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After)-.15 F 1.333(reading that \214le, it)3.833 F .248 (looks for)108 609.6 R F2(~/.bash_pr)2.748 E(o\214le)-.45 E F0(,)A F2 (~/.bash_lo)2.748 E(gin)-.1 E F0 2.748(,a)C(nd)-2.748 E F2(~/.pr)2.748 E (o\214le)-.45 E F0 2.748(,i)C 2.749(nt)-2.748 G .249(hat order)-2.749 F 2.749(,a)-.4 G .249(nd reads and e)-2.749 F -.15(xe)-.15 G .249 (cutes commands from).15 F .076(the \214rst one that e)108 621.6 R .076 (xists and is readable.)-.15 F(The)5.076 E F1(\255\255nopr)2.576 E (o\214le)-.18 E F0 .076 (option may be used when the shell is started to in-)2.576 F (hibit this beha)108 633.6 Q(vior)-.2 E(.)-.55 E 1.104 (When an interacti)108 650.4 R 1.404 -.15(ve l)-.25 H 1.104 (ogin shell e).15 F 1.104(xits, or a non-interacti)-.15 F 1.404 -.15 (ve l)-.25 H 1.104(ogin shell e).15 F -.15(xe)-.15 G 1.104(cutes the).15 F F1(exit)3.604 E F0 -.2(bu)3.604 G 1.104(iltin command,).2 F F1(bash) 108 662.4 Q F0(reads and e)2.5 E -.15(xe)-.15 G (cutes commands from the \214le).15 E F2(~/.bash_lo)2.5 E(gout)-.1 E F0 2.5(,i)C 2.5(fi)-2.5 G 2.5(te)-2.5 G(xists.)-2.65 E 1.698 (When an interacti)108 679.2 R 1.998 -.15(ve s)-.25 H 1.698 (hell that is not a login shell is started,).15 F F1(bash)4.197 E F0 1.697(reads and e)4.197 F -.15(xe)-.15 G 1.697(cutes commands from).15 F F2(~/.bashr)108 691.2 Q(c)-.37 E F0 2.535(,i)C 2.535(ft)-2.535 G .035 (hat \214le e)-2.535 F 2.535(xists. This)-.15 F .036 (may be inhibited by using the)2.535 F F12.536 E(c)-.18 E F0 2.536(option. The)2.536 F F12.536 E(c\214le)-.18 E F2(\214le) 2.536 E F0 .036(option will)2.536 F(force)108 703.2 Q F1(bash)2.5 E F0 (to read and e)2.5 E -.15(xe)-.15 G(cute commands from).15 E F2(\214le) 2.5 E F0(instead of)2.5 E F2(~/.bashr)2.5 E(c)-.37 E F0(.)A(When)108 720 Q F1(bash)5.306 E F0 2.806(is started non-interacti)5.306 F -.15(ve)-.25 G(ly).15 E 5.306(,t)-.65 G 5.306(or)-5.306 G 2.806 (un a shell script, for e)-5.306 F 2.805(xample, it looks for the v)-.15 F(ariable)-.25 E(GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(2) 195.395 E 0 Cg EP %%Page: 3 3 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 9/Times-Bold@0 SF -.27(BA)108 84 S(SH_ENV).27 E F0 1.01(in the en)3.26 F 1.01 (vironment, e)-.4 F 1.01(xpands its v)-.15 F 1.01 (alue if it appears there, and uses the e)-.25 F 1.011(xpanded v)-.15 F 1.011(alue as the)-.25 F(name of a \214le to read and e)108 96 Q -.15 (xe)-.15 G(cute.).15 E/F2 10/Times-Bold@0 SF(Bash)5 E F0(beha)2.5 E -.15 (ve)-.2 G 2.5(sa).15 G 2.5(si)-2.5 G 2.5(ft)-2.5 G(he follo)-2.5 E (wing command were e)-.25 E -.15(xe)-.15 G(cuted:).15 E/F3 10/Courier@0 SF(if [ \255n "$BASH_ENV" ]; then . "$BASH_ENV"; fi)144 114 Q F0 -.2(bu) 108 132 S 2.5(tt).2 G(he v)-2.5 E(alue of the)-.25 E F1 -.666(PA)2.5 G (TH)-.189 E F0 -.25(va)2.25 G (riable is not used to search for the \214lename.).25 E(If)108 148.8 Q F2(bash)3.417 E F0 .917(is in)3.417 F -.2(vo)-.4 G -.1(ke).2 G 3.417(dw) .1 G .917(ith the name)-3.417 F F2(sh)3.417 E F0 3.417(,i)C 3.417(tt) -3.417 G .917(ries to mimic the startup beha)-3.417 F .917 (vior of historical v)-.2 F .917(ersions of)-.15 F F2(sh)3.417 E F0(as) 3.417 E .145 (closely as possible, while conforming to the POSIX standard as well.) 108 160.8 R .145(When in)5.145 F -.2(vo)-.4 G -.1(ke).2 G 2.645(da).1 G 2.645(sa)-2.645 G 2.645(ni)-2.645 G(nteracti)-2.645 E .445 -.15(ve l) -.25 H(ogin).15 E 1.264(shell, or a non-interacti)108 172.8 R 1.564 -.15 (ve s)-.25 H 1.264(hell with the).15 F F2(\255\255login)3.764 E F0 1.264 (option, it \214rst attempts to read and e)3.764 F -.15(xe)-.15 G 1.263 (cute commands).15 F(from)108 184.8 Q/F4 10/Times-Italic@0 SF(/etc/pr) 4.173 E(o\214le)-.45 E F0(and)3.203 E F4(~/.pr)2.523 E(o\214le)-.45 E F0 3.023(,i).18 G 3.024(nt)-3.023 G .524(hat order)-3.024 F 5.524(.T)-.55 G (he)-5.524 E F2(\255\255nopr)3.024 E(o\214le)-.18 E F0 .524 (option may be used to inhibit this beha)3.024 F(vior)-.2 E(.)-.55 E .418(When in)108 196.8 R -.2(vo)-.4 G -.1(ke).2 G 2.918(da).1 G 2.918 (sa)-2.918 G 2.918(ni)-2.918 G(nteracti)-2.918 E .718 -.15(ve s)-.25 H .418(hell with the name).15 F F2(sh)2.918 E F0(,)A F2(bash)2.918 E F0 .418(looks for the v)2.918 F(ariable)-.25 E F1(ENV)2.918 E/F5 9 /Times-Roman@0 SF(,)A F0 -.15(ex)2.667 G .417(pands its v).15 F(alue) -.25 E .171(if it is de\214ned, and uses the e)108 208.8 R .171 (xpanded v)-.15 F .171(alue as the name of a \214le to read and e)-.25 F -.15(xe)-.15 G 2.671(cute. Since).15 F 2.671(as)2.671 G .171(hell in) -2.671 F -.2(vo)-.4 G -.1(ke).2 G(d).1 E(as)108 220.8 Q F2(sh)3.081 E F0 .581(does not attempt to read and e)3.081 F -.15(xe)-.15 G .581 (cute commands from an).15 F 3.08(yo)-.15 G .58 (ther startup \214les, the)-3.08 F F23.08 E(c\214le)-.18 E F0 .58(option has)3.08 F .182(no ef)108 232.8 R 2.682(fect. A)-.25 F (non-interacti)2.682 E .482 -.15(ve s)-.25 H .182(hell in).15 F -.2(vo) -.4 G -.1(ke).2 G 2.682(dw).1 G .182(ith the name)-2.682 F F2(sh)2.682 E F0 .182(does not attempt to read an)2.682 F 2.683(yo)-.15 G .183 (ther startup \214les.)-2.683 F(When in)108 244.8 Q -.2(vo)-.4 G -.1(ke) .2 G 2.5(da).1 G(s)-2.5 E F2(sh)2.5 E F0(,)A F2(bash)2.5 E F0(enters)2.5 E F4(posix)3.75 E F0(mode after the startup \214les are read.)3.03 E (When)108 261.6 Q F2(bash)2.727 E F0 .226(is started in)2.727 F F4 (posix)3.976 E F0 .226(mode, as with the)3.256 F F2(\255\255posix)2.726 E F0 .226(command line option, it follo)2.726 F .226(ws the POSIX stan-) -.25 F .341(dard for startup \214les.)108 273.6 R .341 (In this mode, interacti)5.341 F .641 -.15(ve s)-.25 H .341(hells e).15 F .341(xpand the)-.15 F F1(ENV)2.841 E F0 -.25(va)2.591 G .342 (riable and commands are read and).25 F -.15(exe)108 285.6 S (cuted from the \214le whose name is the e).15 E(xpanded v)-.15 E 2.5 (alue. No)-.25 F(other startup \214les are read.)2.5 E F2(Bash)108 302.4 Q F0 .224(attempts to determine when it is being run with its standard \ input connected to a netw)2.724 F .223(ork connection,)-.1 F .025 (as when e)108 314.4 R -.15(xe)-.15 G .025 (cuted by the remote shell daemon, usually).15 F F4 -.1(rs)2.525 G(hd).1 E F0 2.525(,o)C 2.525(rt)-2.525 G .025(he secure shell daemon)-2.525 F F4(sshd)2.525 E F0 5.025(.I)C(f)-5.025 E F2(bash)2.525 E F0(deter)2.525 E(-)-.2 E .134(mines it is being run in this f)108 326.4 R .134 (ashion, it reads and e)-.1 F -.15(xe)-.15 G .133(cutes commands from) .15 F F4(~/.bashr)2.633 E(c)-.37 E F0 2.633(,i)C 2.633(ft)-2.633 G .133 (hat \214le e)-2.633 F .133(xists and is)-.15 F 2.869(readable. It)108 338.4 R .369(will not do this if in)2.869 F -.2(vo)-.4 G -.1(ke).2 G 2.869(da).1 G(s)-2.869 E F2(sh)2.869 E F0 5.369(.T)C(he)-5.369 E F2 2.869 E(c)-.18 E F0 .369 (option may be used to inhibit this beha)2.869 F(vior)-.2 E 2.869(,a)-.4 G(nd)-2.869 E(the)108 350.4 Q F22.919 E(c\214le)-.18 E F0 .419 (option may be used to force another \214le to be read, b)2.919 F .419 (ut neither)-.2 F F4 -.1(rs)2.919 G(hd).1 E F0(nor)2.919 E F4(sshd)2.919 E F0 .418(generally in)2.919 F -.2(vo)-.4 G -.1(ke).2 G (the shell with those options or allo)108 362.4 Q 2.5(wt)-.25 G (hem to be speci\214ed.)-2.5 E .433(If the shell is started with the ef) 108 379.2 R(fecti)-.25 E .733 -.15(ve u)-.25 H .433 (ser \(group\) id not equal to the real user \(group\) id, and the).15 F F22.934 E F0(op-)2.934 E 1.124(tion is not supplied, no startup \ \214les are read, shell functions are not inherited from the en)108 391.2 R 1.124(vironment, the)-.4 F F1(SHELLOPTS)108 403.2 Q F5(,)A F1 -.27(BA)2.959 G(SHOPTS).27 E F5(,)A F1(CDP)2.959 E -.855(AT)-.666 G(H) .855 E F5(,)A F0(and)2.959 E F1(GLOBIGNORE)3.209 E F0 -.25(va)2.959 G .709(riables, if the).25 F 3.209(ya)-.15 G .71(ppear in the en)-3.209 F .71(vironment, are)-.4 F .905(ignored, and the ef)108 415.2 R(fecti)-.25 E 1.205 -.15(ve u)-.25 H .904(ser id is set to the real user id.).15 F .904(If the)5.904 F F23.404 E F0 .904(option is supplied at in) 3.404 F -.2(vo)-.4 G .904(cation, the).2 F(startup beha)108 427.2 Q (vior is the same, b)-.2 E(ut the ef)-.2 E(fecti)-.25 E .3 -.15(ve u) -.25 H(ser id is not reset.).15 E/F6 10.95/Times-Bold@0 SF(DEFINITIONS) 72 444 Q F0(The follo)108 456 Q (wing de\214nitions are used throughout the rest of this document.)-.25 E F2(blank)108 468 Q F0 2.5(As)144 468 S(pace or tab)-2.5 E(.)-.4 E F2 -.1(wo)108 480 S(rd).1 E F0 2.5(As)144 480 S (equence of characters considered as a single unit by the shell.)-2.5 E (Also kno)5 E(wn as a)-.25 E F2(tok)2.5 E(en)-.1 E F0(.)A F2(name)108 492 Q F0(A)144 492 Q F4(wor)3.005 E(d)-.37 E F0 .165 (consisting only of alphanumeric characters and underscores, and be) 3.435 F .166(ginning with an alpha-)-.15 F (betic character or an underscore.)144 504 Q(Also referred to as an)5 E F2(identi\214er)2.5 E F0(.)A F2(metacharacter)108 516 Q F0 2.5(Ac)144 528 S(haracter that, when unquoted, separates w)-2.5 E 2.5(ords. One)-.1 F(of the follo)2.5 E(wing:)-.25 E F2 5(|&;\(\)<>s)144 540 S 2.5 (pace tab newline)-5 F(contr)108 552 Q(ol operator)-.18 E F0(A)144 564 Q F4(tok)2.5 E(en)-.1 E F0(that performs a control function.)2.5 E (It is one of the follo)5 E(wing symbols:)-.25 E F2 2.5 (|| & && ; ;; ;& ;;& \( \) | |&)144 576 R()10 E F6(RESER)72 592.8 Q(VED W)-.602 E(ORDS)-.11 E F4 .307(Reserved wor)108 604.8 R(ds) -.37 E F0 .307(are w)2.807 F .307(ords that ha)-.1 F .607 -.15(ve a s) -.2 H .306(pecial meaning to the shell.).15 F .306(The follo)5.306 F .306(wing w)-.25 F .306(ords are recognized as)-.1 F(reserv)108 616.8 Q .313(ed when unquoted and either the \214rst w)-.15 F .314 (ord of a command \(see)-.1 F F1 .314(SHELL GRAMMAR)2.814 F F0(belo) 2.564 E .314(w\), the third)-.25 F -.1(wo)108 628.8 S .644(rd of a).1 F F2(case)3.144 E F0(or)3.144 E F2(select)3.143 E F0 .643(command \(only) 3.143 F F2(in)3.143 E F0 .643(is v)3.143 F .643(alid\), or the third w) -.25 F .643(ord of a)-.1 F F2 -.25(fo)3.143 G(r).25 E F0 .643 (command \(only)3.143 F F2(in)3.143 E F0(and)3.143 E F2(do)3.143 E F0 (are v)108 640.8 Q(alid\):)-.25 E F2 11.295(!c)144 657.6 S 8.795 (ase copr)-11.295 F 8.795(oc do done elif else esac \214 f)-.18 F 8.795 (or function if in select then)-.25 F 7.5(until while { } time [[ ]])144 669.6 R F6(SHELL GRAMMAR)72 686.4 Q F2(Simple Commands)87 698.4 Q F0(A) 108 710.4 Q F4 .389(simple command)2.889 F F0 .389 (is a sequence of optional v)2.889 F .388(ariable assignments follo)-.25 F .388(wed by)-.25 F F2(blank)2.888 E F0 .388(-separated w)B .388 (ords and)-.1 F .815(redirections, and terminated by a)108 722.4 R F4 (contr)3.315 E .815(ol oper)-.45 F(ator)-.15 E F0 5.815(.T)C .815 (he \214rst w)-5.815 F .816(ord speci\214es the command to be e)-.1 F -.15(xe)-.15 G(cuted,).15 E(GNU Bash 5.1)72 768 Q(2020 October 29) 141.235 E(3)195.395 E 0 Cg EP %%Page: 4 4 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E (and is passed as ar)108 84 Q(gument zero.)-.18 E(The remaining w)5 E (ords are passed as ar)-.1 E(guments to the in)-.18 E -.2(vo)-.4 G -.1 (ke).2 G 2.5(dc).1 G(ommand.)-2.5 E(The return v)108 100.8 Q(alue of a) -.25 E/F1 10/Times-Italic@0 SF(simple command)2.5 E F0(is its e)2.5 E (xit status, or 128+)-.15 E F1(n)A F0 (if the command is terminated by signal)3.333 E F1(n)2.86 E F0(.).24 E /F2 10/Times-Bold@0 SF(Pipelines)87 117.6 Q F0(A)108 129.6 Q F1 (pipeline)2.996 E F0 .496(is a sequence of one or more commands separat\ ed by one of the control operators)2.996 F F2(|)2.996 E F0(or)2.996 E F2 (|&)2.996 E F0 5.496(.T)C(he)-5.496 E(format for a pipeline is:)108 141.6 Q([)144 158.4 Q F2(time)A F0([)2.5 E F2A F0(]] [ ! ])A F1 (command)2.5 E F0 2.5([[)2.5 G F2(|)-2.5 E/F3 10/Symbol SFA F2(|&)A F0(])A F1(command2)2.5 E F0(... ])2.5 E .231(The standard output of)108 175.2 R F1(command)2.931 E F0 .232 (is connected via a pipe to the standard input of)3.502 F F1(command2) 2.932 E F0 5.232(.T).02 G .232(his connec-)-5.232 F .643 (tion is performed before an)108 187.2 R 3.143(yr)-.15 G .642 (edirections speci\214ed by the command \(see)-3.143 F/F4 9/Times-Bold@0 SF(REDIRECTION)3.142 E F0(belo)2.892 E 3.142(w\). If)-.25 F F2(|&)3.142 E F0(is)3.142 E(used,)108 199.2 Q F1(command)2.663 E F0 1.263 -.55('s s) D .163(tandard error).55 F 2.663(,i)-.4 G 2.663(na)-2.663 G .163 (ddition to its standard output, is connected to)-2.663 F F1(command2) 2.664 E F0 1.264 -.55('s s)D .164(tandard in-).55 F .438 (put through the pipe; it is shorthand for)108 211.2 R F2 .437(2>&1 |) 2.937 F F0 5.437(.T)C .437 (his implicit redirection of the standard error to the stan-)-5.437 F (dard output is performed after an)108 223.2 Q 2.5(yr)-.15 G (edirections speci\214ed by the command.)-2.5 E .48 (The return status of a pipeline is the e)108 240 R .48 (xit status of the last command, unless the)-.15 F F2(pipefail)2.98 E F0 .48(option is enabled.)2.98 F(If)108 252 Q F2(pipefail)2.687 E F0 .187 (is enabled, the pipeline')2.687 F 2.687(sr)-.55 G .186 (eturn status is the v)-2.687 F .186 (alue of the last \(rightmost\) command to e)-.25 F .186(xit with a)-.15 F .61(non-zero status, or zero if all commands e)108 264 R .611 (xit successfully)-.15 F 5.611(.I)-.65 G 3.111(ft)-5.611 G .611 (he reserv)-3.111 F .611(ed w)-.15 F(ord)-.1 E F2(!)3.111 E F0 .611 (precedes a pipeline, the)5.611 F -.15(ex)108 276 S .55 (it status of that pipeline is the logical ne).15 F -.05(ga)-.15 G .55 (tion of the e).05 F .55(xit status as described abo)-.15 F -.15(ve)-.15 G 5.55(.T).15 G .55(he shell w)-5.55 F .55(aits for)-.1 F (all commands in the pipeline to terminate before returning a v)108 288 Q(alue.)-.25 E .298(If the)108 304.8 R F2(time)2.799 E F0(reserv)2.799 E .299(ed w)-.15 F .299(ord precedes a pipeline, the elapsed as well as u\ ser and system time consumed by its)-.1 F -.15(exe)108 316.8 S .14 (cution are reported when the pipeline terminates.).15 F(The)5.139 E F2 2.639 E F0 .139(option changes the output format to that spec-) 2.639 F .302(i\214ed by POSIX.)108 328.8 R .303(When the shell is in) 5.302 F F1 .303(posix mode)2.803 F F0 2.803(,i)C 2.803(td)-2.803 G .303 (oes not recognize)-2.803 F F2(time)2.803 E F0 .303(as a reserv)2.803 F .303(ed w)-.15 F .303(ord if the ne)-.1 F(xt)-.15 E(tok)108 340.8 Q .736 (en be)-.1 F .736(gins with a `-'.)-.15 F(The)5.736 E F4(TIMEFORMA)3.236 E(T)-.855 E F0 -.25(va)2.986 G .736 (riable may be set to a format string that speci\214es ho).25 F 3.235 (wt)-.25 G(he)-3.235 E .879 (timing information should be displayed; see the description of)108 352.8 R F4(TIMEFORMA)3.38 E(T)-.855 E F0(under)3.13 E F2 .88(Shell V) 3.38 F(ariables)-.92 E F0(be-)3.38 E(lo)108 364.8 Q -.65(w.)-.25 G .162 (When the shell is in)108 381.6 R F1 .162(posix mode)2.662 F F0(,)A F2 (time)2.662 E F0 .162(may be follo)2.662 F .161(wed by a ne)-.25 F 2.661 (wline. In)-.25 F .161(this case, the shell displays the to-)2.661 F .243(tal user and system time consumed by the shell and its children.) 108 393.6 R(The)5.243 E F4(TIMEFORMA)2.743 E(T)-.855 E F0 -.25(va)2.493 G .243(riable may be used).25 F (to specify the format of the time information.)108 405.6 Q .656 (Each command in a pipeline is e)108 422.4 R -.15(xe)-.15 G .655 (cuted as a separate process \(i.e., in a subshell\).).15 F(See)5.655 E F4 .655(COMMAND EXE-)3.155 F .05(CUTION ENVIR)108 434.4 R(ONMENT)-.27 E F0 .051(for a description of a subshell en)2.3 F 2.551(vironment. If)-.4 F(the)2.551 E F2(lastpipe)2.551 E F0 .051(option is enabled us-)2.551 F .416(ing the)108 446.4 R F2(shopt)2.916 E F0 -.2(bu)2.916 G .416 (iltin \(see the description of).2 F F2(shopt)2.916 E F0(belo)2.916 E .416(w\), the last element of a pipeline may be run by the)-.25 F (shell process.)108 458.4 Q F2(Lists)87 475.2 Q F0(A)108 487.2 Q F1 (list)2.849 E F0 .349(is a sequence of one or more pipelines separated \ by one of the operators)2.849 F F2(;)2.85 E F0(,)A F2(&)2.85 E F0(,)A F2 (&&)2.85 E F0 2.85(,o)C(r)-2.85 E F2(||)2.85 E F0 2.85(,a)C .35 (nd option-)-2.85 F(ally terminated by one of)108 499.2 Q F2(;)2.5 E F0 (,)A F2(&)2.5 E F0 2.5(,o)C(r)-2.5 E F2()2.5 E F0(.)A .961 (Of these list operators,)108 516 R F2(&&)3.461 E F0(and)3.461 E F2(||) 3.461 E F0(ha)3.461 E 1.261 -.15(ve e)-.2 H .961(qual precedence, follo) .15 F .96(wed by)-.25 F F2(;)3.46 E F0(and)3.46 E F2(&)3.46 E F0 3.46 (,w)C .96(hich ha)-3.46 F 1.26 -.15(ve e)-.2 H .96(qual prece-).15 F (dence.)108 528 Q 2.5(As)108 544.8 S(equence of one or more ne)-2.5 E (wlines may appear in a)-.25 E F1(list)2.5 E F0 (instead of a semicolon to delimit commands.)2.5 E .029 (If a command is terminated by the control operator)108 561.6 R F2(&) 2.529 E F0 2.529(,t)C .029(he shell e)-2.529 F -.15(xe)-.15 G .029 (cutes the command in the).15 F F1(bac)2.529 E(kgr)-.2 E(ound)-.45 E F0 (in)2.529 E 2.678(as)108 573.6 S 2.678(ubshell. The)-2.678 F .178 (shell does not w)2.678 F .178 (ait for the command to \214nish, and the return status is 0.)-.1 F .178 (These are referred)5.178 F .778(to as)108 585.6 R F1(async)3.278 E(hr) -.15 E(onous)-.45 E F0 3.278(commands. Commands)3.278 F .779 (separated by a)3.278 F F2(;)3.279 E F0 .779(are e)3.279 F -.15(xe)-.15 G .779(cuted sequentially; the shell w).15 F .779(aits for)-.1 F (each command to terminate in turn.)108 597.6 Q (The return status is the e)5 E(xit status of the last command e)-.15 E -.15(xe)-.15 G(cuted.).15 E .172(AND and OR lists are sequences of one \ or more pipelines separated by the)108 614.4 R F2(&&)2.671 E F0(and) 2.671 E F2(||)2.671 E F0 .171(control operators, re-)2.671 F(specti)108 626.4 Q -.15(ve)-.25 G(ly).15 E 5(.A)-.65 G(ND and OR lists are e)-5 E -.15(xe)-.15 G(cuted with left associati).15 E(vity)-.25 E 5(.A)-.65 G 2.5(nA)-5 G(ND list has the form)-2.5 E F1(command1)144 643.2 Q F2(&&) 2.5 E F1(command2)2.5 E(command2)108.2 660 Q F0(is e)2.52 E -.15(xe)-.15 G(cuted if, and only if,).15 E F1(command1)2.7 E F0(returns an e)2.5 E (xit status of zero \(success\).)-.15 E(An OR list has the form)108 676.8 Q F1(command1)144 693.6 Q F2(||)2.5 E F1(command2)2.5 E(command2) 108.2 710.4 Q F0 .434(is e)2.954 F -.15(xe)-.15 G .434 (cuted if, and only if,).15 F F1(command1)3.135 E F0 .435 (returns a non-zero e)2.935 F .435(xit status.)-.15 F .435 (The return status of AND)5.435 F(and OR lists is the e)108 722.4 Q (xit status of the last command e)-.15 E -.15(xe)-.15 G (cuted in the list.).15 E(GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(4)195.395 E 0 Cg EP %%Page: 5 5 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10/Times-Bold@0 SF(Compound Commands)87 84 Q F0(A)108 96 Q/F2 10/Times-Italic@0 SF 1.054 (compound command)3.554 F F0 1.054(is one of the follo)3.554 F 3.553 (wing. In)-.25 F 1.053(most cases a)3.553 F F2(list)3.553 E F0 1.053 (in a command')3.553 F 3.553(sd)-.55 G 1.053(escription may be)-3.553 F 1.026(separated from the rest of the command by one or more ne)108 108 R 1.026(wlines, and may be follo)-.25 F 1.027(wed by a ne)-.25 F 1.027 (wline in)-.25 F(place of a semicolon.)108 120 Q(\()108 136.8 Q F2(list) A F0(\))A F2(list)144 136.8 Q F0 .011(is e)2.512 F -.15(xe)-.15 G .011 (cuted in a subshell en).15 F .011(vironment \(see)-.4 F/F3 9 /Times-Bold@0 SF .011(COMMAND EXECUTION ENVIR)2.511 F(ONMENT)-.27 E F0 (belo)2.261 E(w\).)-.25 E -1.11(Va)144 148.8 S .016 (riable assignments and b)1.11 F .016(uiltin commands that af)-.2 F .016 (fect the shell')-.25 F 2.517(se)-.55 G -.4(nv)-2.517 G .017 (ironment do not remain in ef-).4 F(fect after the command completes.) 144 160.8 Q(The return status is the e)5 E(xit status of)-.15 E F2(list) 2.5 E F0(.)A({)108 177.6 Q F2(list)2.5 E F0 2.5(;})C F2(list)144 177.6 Q F0 .402(is simply e)2.902 F -.15(xe)-.15 G .401 (cuted in the current shell en).15 F(vironment.)-.4 E F2(list)5.401 E F0 .401(must be terminated with a ne)2.901 F .401(wline or)-.25 F 3.214 (semicolon. This)144 189.6 R .714(is kno)3.214 F .714(wn as a)-.25 F F2 (gr)3.215 E .715(oup command)-.45 F F0 5.715(.T)C .715 (he return status is the e)-5.715 F .715(xit status of)-.15 F F2(list) 3.215 E F0 5.715(.N)C(ote)-5.715 E .22(that unlik)144 201.6 R 2.72(et) -.1 G .22(he metacharacters)-2.72 F F1(\()2.72 E F0(and)2.72 E F1(\)) 2.72 E F0(,)A F1({)2.72 E F0(and)2.72 E F1(})2.719 E F0(are)2.719 E F2 -.37(re)2.719 G .219(served wor).37 F(ds)-.37 E F0 .219 (and must occur where a reserv)2.719 F(ed)-.15 E -.1(wo)144 213.6 S .256 (rd is permitted to be recognized.).1 F .256(Since the)5.256 F 2.756(yd) -.15 G 2.756(on)-2.756 G .257(ot cause a w)-2.756 F .257(ord break, the) -.1 F 2.757(ym)-.15 G .257(ust be separated)-2.757 F(from)144 225.6 Q F2 (list)2.5 E F0(by whitespace or another shell metacharacter)2.5 E(.)-.55 E(\(\()108 242.4 Q F2 -.2(ex)C(pr).2 E(ession)-.37 E F0(\)\))A(The)144 254.4 Q F2 -.2(ex)2.552 G(pr).2 E(ession)-.37 E F0 .052(is e)2.552 F -.25(va)-.25 G .051(luated according to the rules described belo).25 F 2.551(wu)-.25 G(nder)-2.551 E F3 .051(ARITHMETIC EV)2.551 F(ALU)-1.215 E (A-)-.54 E(TION)144 266.4 Q/F4 9/Times-Roman@0 SF(.)A F0 .411(If the v) 4.91 F .411(alue of the e)-.25 F .411(xpression is non-zero, the return\ status is 0; otherwise the return status)-.15 F(is 1.)144 278.4 Q (This is e)5 E(xactly equi)-.15 E -.25(va)-.25 G(lent to).25 E F1(let ") 2.5 E F2 -.2(ex)C(pr).2 E(ession)-.37 E F1(")A F0(.)A F1([[)108 295.2 Q F2 -.2(ex)2.5 G(pr).2 E(ession)-.37 E F1(]])2.5 E F0 .003 (Return a status of 0 or 1 depending on the e)144 307.2 R -.25(va)-.25 G .003(luation of the conditional e).25 F(xpression)-.15 E F2 -.2(ex)2.503 G(pr).2 E(ession)-.37 E F0 5.003(.E)C(x-)-5.003 E .758 (pressions are composed of the primaries described belo)144 319.2 R 3.259(wu)-.25 G(nder)-3.259 E F3(CONDITION)3.259 E .759(AL EXPRESSIONS) -.18 F F4(.)A F0 -.8(Wo)144 331.2 S .029(rd splitting and pathname e).8 F .029(xpansion are not performed on the w)-.15 F .029(ords between the) -.1 F F1([[)2.528 E F0(and)2.528 E F1(]])2.528 E F0 2.528(;t)C(ilde) -2.528 E -.15(ex)144 343.2 S 3.968(pansion, parameter and v).15 F 3.969 (ariable e)-.25 F 3.969(xpansion, arithmetic e)-.15 F 3.969 (xpansion, command substitution,)-.15 F .571 (process substitution, and quote remo)144 355.2 R -.25(va)-.15 G 3.071 (la).25 G .571(re performed.)-3.071 F .571 (Conditional operators such as)5.571 F F13.07 E F0 .57(must be) 3.07 F(unquoted to be recognized as primaries.)144 367.2 Q (When used with)144 385.2 Q F1([[)2.5 E F0 2.5(,t)C(he)-2.5 E F1(<)2.5 E F0(and)2.5 E F1(>)2.5 E F0(operators sort le)2.5 E (xicographically using the current locale.)-.15 E .502(When the)144 403.2 R F1(==)3.002 E F0(and)3.002 E F1(!=)3.002 E F0 .502(operators ar\ e used, the string to the right of the operator is considered a pat-) 3.002 F .81(tern and matched according to the rules described belo)144 415.2 R 3.31(wu)-.25 G(nder)-3.31 E F1 -.1(Pa)3.31 G(tter).1 E 3.31(nM) -.15 G(atching)-3.31 E F0 3.31(,a)C 3.31(si)-3.31 G 3.31(ft)-3.31 G(he) -3.31 E F1(ext-)3.31 E(glob)144 427.2 Q F0 .313 (shell option were enabled.)2.813 F(The)5.313 E F1(=)2.813 E F0 .313 (operator is equi)2.813 F -.25(va)-.25 G .313(lent to).25 F F1(==)2.813 E F0 5.313(.I)C 2.813(ft)-5.313 G(he)-2.813 E F1(nocasematch)2.813 E F0 .314(shell op-)2.814 F .03 (tion is enabled, the match is performed without re)144 439.2 R -.05(ga) -.15 G .029(rd to the case of alphabetic characters.).05 F .029(The re-) 5.029 F .258(turn v)144 451.2 R .259(alue is 0 if the string matches \() -.25 F F1(==)A F0 2.759(\)o)C 2.759(rd)-2.759 G .259(oes not match \() -2.759 F F1(!=)A F0 2.759(\)t)C .259(he pattern, and 1 otherwise.)-2.759 F(An)5.259 E(y)-.15 E(part of the pattern may be quoted to force the qu\ oted portion to be matched as a string.)144 463.2 Q .243 (An additional binary operator)144 481.2 R(,)-.4 E F1(=~)2.743 E F0 2.743(,i)C 2.743(sa)-2.743 G -.25(va)-2.943 G .243 (ilable, with the same precedence as).25 F F1(==)2.743 E F0(and)2.743 E F1(!=)2.743 E F0 5.243(.W)C .243(hen it is)-5.243 F .182 (used, the string to the right of the operator is considered a POSIX e) 144 493.2 R .182(xtended re)-.15 F .182(gular e)-.15 F .182 (xpression and)-.15 F 2.624(matched accordingly \(using the POSIX)144 505.2 R F2 -.37(re)5.124 G(gcomp)-.03 E F0(and)5.124 E F2 -.37(re)5.124 G -.1(ge)-.03 G(xec)-.1 E F0(interf)5.123 E 2.623 (aces usually described in)-.1 F F2 -.37(re)144 517.2 S -.1(ge)-.03 G(x) -.1 E F0 3.271(\(3\)\). The)B .771(return v)3.271 F .772 (alue is 0 if the string matches the pattern, and 1 otherwise.)-.25 F .772(If the re)5.772 F(gular)-.15 E -.15(ex)144 529.2 S .509 (pression is syntactically incorrect, the conditional e).15 F (xpression')-.15 E 3.008(sr)-.55 G .508(eturn v)-3.008 F .508 (alue is 2.)-.25 F .508(If the)5.508 F F1(nocase-)3.008 E(match)144 541.2 Q F0 1.307 (shell option is enabled, the match is performed without re)3.806 F -.05 (ga)-.15 G 1.307(rd to the case of alphabetic).05 F 3.063 (characters. An)144 553.2 R 3.063(yp)-.15 G .563(art of the pattern may\ be quoted to force the quoted portion to be matched as a)-3.063 F 2.943 (string. Brack)144 565.2 R .443(et e)-.1 F .443(xpressions in re)-.15 F .443(gular e)-.15 F .443(xpressions must be treated carefully)-.15 F 2.944(,s)-.65 G .444(ince normal quoting)-2.944 F .615 (characters lose their meanings between brack)144 577.2 R 3.115(ets. If) -.1 F .614(the pattern is stored in a shell v)3.115 F .614 (ariable, quot-)-.25 F(ing the v)144 589.2 Q(ariable e)-.25 E (xpansion forces the entire pattern to be matched as a string.)-.15 E .838(The pattern will match if it matches an)144 607.2 R 3.338(yp)-.15 G .838(art of the string.)-3.338 F .839(Anchor the pattern using the)5.839 F F1(^)3.339 E F0(and)3.339 E F1($)3.339 E F0(re)144 619.2 Q .847 (gular e)-.15 F .846 (xpression operators to force it to match the entire string.)-.15 F .846 (The array v)5.846 F(ariable)-.25 E F3 -.27(BA)3.346 G(SH_RE-).27 E(MA) 144 631.2 Q(TCH)-.855 E F0 .321 (records which parts of the string matched the pattern.)2.571 F .322 (The element of)5.322 F F3 -.27(BA)2.822 G(SH_REMA).27 E(TCH)-.855 E F0 .583(with inde)144 643.2 R 3.083(x0)-.15 G .582 (contains the portion of the string matching the entire re)-.001 F .582 (gular e)-.15 F 3.082(xpression. Substrings)-.15 F .249 (matched by parenthesized sube)144 655.2 R .249 (xpressions within the re)-.15 F .249(gular e)-.15 F .249 (xpression are sa)-.15 F -.15(ve)-.2 G 2.749(di).15 G 2.75(nt)-2.749 G .25(he remaining)-2.75 F F3 -.27(BA)144 667.2 S(SH_REMA).27 E(TCH)-.855 E F0 1.13(indices. The element of)3.38 F F3 -.27(BA)3.63 G(SH_REMA).27 E (TCH)-.855 E F0 1.13(with inde)3.38 F(x)-.15 E F2(n)3.63 E F0 1.13 (is the portion of the)3.63 F(string matching the)144 679.2 Q F2(n)2.5 E F0(th parenthesized sube)A(xpression.)-.15 E .785 (Expressions may be combined using the follo)144 697.2 R .786 (wing operators, listed in decreasing order of prece-)-.25 F(dence:)144 709.2 Q(GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(5)195.395 E 0 Cg EP %%Page: 6 6 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10/Times-Bold@0 SF(\()144 84 Q/F2 10/Times-Italic@0 SF -.2(ex)2.5 G(pr).2 E(ession)-.37 E F1(\))2.5 E F0 .523(Returns the v)180 96 R .522(alue of)-.25 F F2 -.2 (ex)3.022 G(pr).2 E(ession)-.37 E F0 5.522(.T)C .522 (his may be used to o)-5.522 F -.15(ve)-.15 G .522 (rride the normal precedence of).15 F(operators.)180 108 Q F1(!)144 120 Q F2 -.2(ex)2.5 G(pr).2 E(ession)-.37 E F0 -.35(Tr)180 132 S(ue if).35 E F2 -.2(ex)2.5 G(pr).2 E(ession)-.37 E F0(is f)2.74 E(alse.)-.1 E F2 -.2 (ex)144 144 S(pr).2 E(ession1)-.37 E F1(&&)2.5 E F2 -.2(ex)2.5 G(pr).2 E (ession2)-.37 E F0 -.35(Tr)180 156 S(ue if both).35 E F2 -.2(ex)2.5 G (pr).2 E(ession1)-.37 E F0(and)2.5 E F2 -.2(ex)2.5 G(pr).2 E(ession2) -.37 E F0(are true.)2.52 E F2 -.2(ex)144 168 S(pr).2 E(ession1)-.37 E F1 (||)2.5 E F2 -.2(ex)2.5 G(pr).2 E(ession2)-.37 E F0 -.35(Tr)180 180 S (ue if either).35 E F2 -.2(ex)2.5 G(pr).2 E(ession1)-.37 E F0(or)2.5 E F2 -.2(ex)2.5 G(pr).2 E(ession2)-.37 E F0(is true.)2.52 E(The)144 196.8 Q F1(&&)2.675 E F0(and)2.675 E F1(||)2.675 E F0 .175(operators do not e) 2.675 F -.25(va)-.25 G(luate).25 E F2 -.2(ex)2.675 G(pr).2 E(ession2) -.37 E F0 .175(if the v)2.675 F .175(alue of)-.25 F F2 -.2(ex)2.676 G (pr).2 E(ession1)-.37 E F0 .176(is suf)2.676 F .176(\214cient to de-) -.25 F(termine the return v)144 208.8 Q (alue of the entire conditional e)-.25 E(xpression.)-.15 E F1 -.25(fo) 108 225.6 S(r).25 E F2(name)2.5 E F0 2.5([[)2.5 G F1(in)A F0([)2.5 E F2 (wor)2.5 E 2.5(d.)-.37 G(..)-2.5 E F0 2.5(]];])2.5 G F1(do)A F2(list)2.5 E F0(;)2.5 E F1(done)2.5 E F0 .424(The list of w)144 237.6 R .424 (ords follo)-.1 F(wing)-.25 E F1(in)2.924 E F0 .423(is e)2.924 F .423 (xpanded, generating a list of items.)-.15 F .423(The v)5.423 F(ariable) -.25 E F2(name)2.923 E F0 .423(is set to)2.923 F .653 (each element of this list in turn, and)144 249.6 R F2(list)3.153 E F0 .653(is e)3.153 F -.15(xe)-.15 G .653(cuted each time.).15 F .653 (If the)5.653 F F1(in)3.153 E F2(wor)3.153 E(d)-.37 E F0 .653 (is omitted, the)3.153 F F1 -.25(fo)3.153 G(r).25 E F0 .649(command e) 144 261.6 R -.15(xe)-.15 G(cutes).15 E F2(list)3.149 E F0 .648 (once for each positional parameter that is set \(see)3.148 F/F3 9 /Times-Bold@0 SF -.666(PA)3.148 G(RAMETERS).666 E F0(belo)2.898 E(w\).) -.25 E .153(The return status is the e)144 273.6 R .153 (xit status of the last command that e)-.15 F -.15(xe)-.15 G 2.654 (cutes. If).15 F .154(the e)2.654 F .154(xpansion of the items)-.15 F (follo)144 285.6 Q(wing)-.25 E F1(in)2.5 E F0 (results in an empty list, no commands are e)2.5 E -.15(xe)-.15 G (cuted, and the return status is 0.).15 E F1 -.25(fo)108 302.4 S(r).25 E F0(\(\()2.5 E F2 -.2(ex)2.5 G(pr1).2 E F0(;)2.5 E F2 -.2(ex)2.5 G(pr2).2 E F0(;)2.5 E F2 -.2(ex)2.5 G(pr3).2 E F0(\)\) ;)2.5 E F1(do)2.5 E F2 (list)2.5 E F0(;)2.5 E F1(done)2.5 E F0 1.236(First, the arithmetic e) 144 314.4 R(xpression)-.15 E F2 -.2(ex)3.736 G(pr1).2 E F0 1.235(is e) 3.736 F -.25(va)-.25 G 1.235 (luated according to the rules described belo).25 F 3.735(wu)-.25 G (nder)-3.735 E F3 .561(ARITHMETIC EV)144 326.4 R(ALU)-1.215 E -.855(AT) -.54 G(ION).855 E/F4 9/Times-Roman@0 SF(.)A F0 .561(The arithmetic e) 5.061 F(xpression)-.15 E F2 -.2(ex)3.061 G(pr2).2 E F0 .562(is then e) 3.062 F -.25(va)-.25 G .562(luated repeatedly until).25 F .592(it e)144 338.4 R -.25(va)-.25 G .592(luates to zero.).25 F .592(Each time)5.592 F F2 -.2(ex)3.092 G(pr2).2 E F0 -.25(eva)3.092 G .592 (luates to a non-zero v).25 F(alue,)-.25 E F2(list)3.092 E F0 .591(is e) 3.092 F -.15(xe)-.15 G .591(cuted and the arith-).15 F .228(metic e)144 350.4 R(xpression)-.15 E F2 -.2(ex)2.728 G(pr3).2 E F0 .229(is e)2.728 F -.25(va)-.25 G 2.729(luated. If).25 F(an)2.729 E 2.729(ye)-.15 G .229 (xpression is omitted, it beha)-2.879 F -.15(ve)-.2 G 2.729(sa).15 G 2.729(si)-2.729 G 2.729(fi)-2.729 G 2.729(te)-2.729 G -.25(va)-2.979 G .229(luates to 1.).25 F .228(The return v)144 362.4 R .228 (alue is the e)-.25 F .228(xit status of the last command in)-.15 F F2 (list)2.728 E F0 .227(that is e)2.728 F -.15(xe)-.15 G .227(cuted, or f) .15 F .227(alse if an)-.1 F 2.727(yo)-.15 G 2.727(ft)-2.727 G(he)-2.727 E -.15(ex)144 374.4 S(pressions is in).15 E -.25(va)-.4 G(lid.).25 E F1 (select)108 391.2 Q F2(name)2.5 E F0([)2.5 E F1(in)2.5 E F2(wor)2.5 E(d) -.37 E F0 2.5(];)2.5 G F1(do)A F2(list)2.5 E F0(;)2.5 E F1(done)2.5 E F0 .432(The list of w)144 403.2 R .432(ords follo)-.1 F(wing)-.25 E F1(in) 2.932 E F0 .432(is e)2.932 F .432(xpanded, generating a list of items.) -.15 F .433(The set of e)5.433 F .433(xpanded w)-.15 F(ords)-.1 E .843 (is printed on the standard error)144 415.2 R 3.342(,e)-.4 G .842 (ach preceded by a number)-3.342 F 5.842(.I)-.55 G 3.342(ft)-5.842 G(he) -3.342 E F1(in)3.342 E F2(wor)3.342 E(d)-.37 E F0 .842 (is omitted, the posi-)3.342 F .201(tional parameters are printed \(see) 144 427.2 R F3 -.666(PA)2.701 G(RAMETERS).666 E F0(belo)2.451 E 2.701 (w\). The)-.25 F F3(PS3)2.701 E F0 .201(prompt is then displayed and a) 2.451 F .214(line read from the standard input.)144 439.2 R .213 (If the line consists of a number corresponding to one of the dis-)5.214 F 1.537(played w)144 451.2 R 1.537(ords, then the v)-.1 F 1.537(alue of) -.25 F F2(name)4.397 E F0 1.537(is set to that w)4.217 F 4.037(ord. If) -.1 F 1.538(the line is empty)4.038 F 4.038(,t)-.65 G 1.538(he w)-4.038 F 1.538(ords and)-.1 F .066(prompt are displayed ag)144 463.2 R 2.566 (ain. If)-.05 F .065(EOF is read, the command completes.)2.566 F(An) 5.065 E 2.565(yo)-.15 G .065(ther v)-2.565 F .065(alue read causes)-.25 F F2(name)144.36 475.2 Q F0 .953(to be set to null.)3.633 F .953 (The line read is sa)5.953 F -.15(ve)-.2 G 3.454(di).15 G 3.454(nt) -3.454 G .954(he v)-3.454 F(ariable)-.25 E F3(REPL)3.454 E(Y)-.828 E F4 (.)A F0(The)5.454 E F2(list)3.544 E F0 .954(is e)4.134 F -.15(xe)-.15 G .954(cuted after).15 F .072(each selection until a)144 487.2 R F1(br) 2.571 E(eak)-.18 E F0 .071(command is e)2.571 F -.15(xe)-.15 G 2.571 (cuted. The).15 F -.15(ex)2.571 G .071(it status of).15 F F1(select) 2.571 E F0 .071(is the e)2.571 F .071(xit status of the)-.15 F (last command e)144 499.2 Q -.15(xe)-.15 G(cuted in).15 E F2(list)2.59 E F0 2.5(,o).68 G 2.5(rz)-2.5 G(ero if no commands were e)-2.5 E -.15(xe) -.15 G(cuted.).15 E F1(case)108 516 Q F2(wor)2.5 E(d)-.37 E F1(in)2.5 E F0 2.5([[)2.5 G(\(])-2.5 E F2(pattern)2.5 E F0([)2.5 E F1(|)2.5 E F2 (pattern)2.5 E F0 2.5(].)2.5 G(.. \))-2.5 E F2(list)2.5 E F0(;; ] ...) 2.5 E F1(esac)2.5 E F0(A)144 528 Q F1(case)3.264 E F0 .764 (command \214rst e)3.264 F(xpands)-.15 E F2(wor)3.264 E(d)-.37 E F0 3.264(,a)C .764(nd tries to match it ag)-3.264 F .764(ainst each)-.05 F F2(pattern)3.264 E F0 .765(in turn, using the)3.264 F .884 (matching rules described under)144 540 R F1 -.1(Pa)3.384 G(tter).1 E 3.384(nM)-.15 G(atching)-3.384 E F0(belo)3.384 E 4.684 -.65(w. T)-.25 H (he).65 E F2(wor)3.384 E(d)-.37 E F0 .884(is e)3.384 F .883 (xpanded using tilde e)-.15 F(x-)-.15 E .95(pansion, parameter and v)144 552 R .95(ariable e)-.25 F .95(xpansion, arithmetic e)-.15 F .95 (xpansion, command substitution, process)-.15 F .181 (substitution and quote remo)144 564 R -.25(va)-.15 G 2.681(l. Each).25 F F2(pattern)2.681 E F0 -.15(ex)2.681 G .181(amined is e).15 F .181 (xpanded using tilde e)-.15 F .18(xpansion, param-)-.15 F .103 (eter and v)144 576 R .103(ariable e)-.25 F .103(xpansion, arithmetic e) -.15 F .103(xpansion, command substitution, and process substitution.) -.15 F .687(If the)144 588 R F1(nocasematch)3.187 E F0 .687 (shell option is enabled, the match is performed without re)3.187 F -.05 (ga)-.15 G .687(rd to the case of).05 F .464(alphabetic characters.)144 600 R .464(When a match is found, the corresponding)5.464 F F2(list) 2.964 E F0 .464(is e)2.964 F -.15(xe)-.15 G 2.964(cuted. If).15 F(the) 2.964 E F1(;;)2.964 E F0(opera-)2.964 E .675(tor is used, no subsequent\ matches are attempted after the \214rst pattern match.)144 612 R(Using) 5.674 E F1(;&)3.174 E F0 .674(in place)3.174 F(of)144 624 Q F1(;;)2.866 E F0 .366(causes e)2.866 F -.15(xe)-.15 G .366 (cution to continue with the).15 F F2(list)2.866 E F0 .367 (associated with the ne)2.866 F .367(xt set of patterns.)-.15 F(Using) 5.367 E F1(;;&)2.867 E F0 .596(in place of)144 636 R F1(;;)3.096 E F0 .596(causes the shell to test the ne)3.096 F .595 (xt pattern list in the statement, if an)-.15 F 1.895 -.65(y, a)-.15 H .595(nd e).65 F -.15(xe)-.15 G .595(cute an).15 F(y)-.15 E(associated) 144 648 Q F2(list)2.96 E F0 .461 (on a successful match, continuing the case statement e)2.96 F -.15(xe) -.15 G .461(cution as if the pattern list).15 F .677(had not matched.) 144 660 R .677(The e)5.677 F .677 (xit status is zero if no pattern matches.)-.15 F .676 (Otherwise, it is the e)5.677 F .676(xit status of)-.15 F (the last command e)144 672 Q -.15(xe)-.15 G(cuted in).15 E F2(list)2.5 E F0(.)A F1(if)108 688.8 Q F2(list)2.5 E F0(;)A F1(then)2.5 E F2(list) 2.5 E F0 2.5(;[)C F1(elif)A F2(list)2.5 E F0(;)A F1(then)2.5 E F2(list) 2.5 E F0 2.5(;].)C(.. [)-2.5 E F1(else)2.5 E F2(list)2.5 E F0 2.5(;])C F1<8c>A F0(The)144 700.8 Q F1(if)2.977 E F2(list)3.067 E F0 .478(is e) 3.658 F -.15(xe)-.15 G 2.978(cuted. If).15 F .478(its e)2.978 F .478 (xit status is zero, the)-.15 F F1(then)2.978 E F2(list)2.978 E F0 .478 (is e)2.978 F -.15(xe)-.15 G 2.978(cuted. Otherwise,).15 F(each)2.978 E F1(elif)2.978 E F2(list)2.978 E F0 1.088(is e)144 712.8 R -.15(xe)-.15 G 1.088(cuted in turn, and if its e).15 F 1.087 (xit status is zero, the corresponding)-.15 F F1(then)3.587 E F2(list) 3.587 E F0 1.087(is e)3.587 F -.15(xe)-.15 G 1.087(cuted and the).15 F 1.239(command completes.)144 724.8 R 1.239(Otherwise, the)6.239 F F1 (else)3.739 E F2(list)3.739 E F0 1.239(is e)3.739 F -.15(xe)-.15 G 1.239 (cuted, if present.).15 F 1.24(The e)6.239 F 1.24(xit status is the e) -.15 F(xit)-.15 E(GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(6) 195.395 E 0 Cg EP %%Page: 7 7 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E (status of the last command e)144 84 Q -.15(xe)-.15 G (cuted, or zero if no condition tested true.).15 E/F1 10/Times-Bold@0 SF (while)108 100.8 Q/F2 10/Times-Italic@0 SF(list-1)2.5 E F0(;)A F1(do)2.5 E F2(list-2)2.5 E F0(;)A F1(done)2.5 E(until)108 112.8 Q F2(list-1)2.5 E F0(;)A F1(do)2.5 E F2(list-2)2.5 E F0(;)A F1(done)2.5 E F0(The)144 124.8 Q F1(while)3.45 E F0 .95(command continuously e)3.45 F -.15(xe)-.15 G .95(cutes the list).15 F F2(list-2)3.45 E F0 .95 (as long as the last command in the list)3.45 F F2(list-1)144 136.8 Q F0 .205(returns an e)2.705 F .205(xit status of zero.)-.15 F(The)5.205 E F1 (until)2.705 E F0 .205(command is identical to the)2.705 F F1(while) 2.705 E F0 .205(command, e)2.705 F(xcept)-.15 E .6(that the test is ne) 144 148.8 R -.05(ga)-.15 G(ted:).05 E F2(list-2)3.19 E F0 .6(is e)3.12 F -.15(xe)-.15 G .599(cuted as long as the last command in).15 F F2 (list-1)3.189 E F0 .599(returns a non-zero)3.099 F -.15(ex)144 160.8 S .204(it status.).15 F .204(The e)5.204 F .204(xit status of the)-.15 F F1(while)2.704 E F0(and)2.704 E F1(until)2.704 E F0 .205 (commands is the e)2.704 F .205(xit status of the last command)-.15 F -.15(exe)144 172.8 S(cuted in).15 E F2(list-2)2.5 E F0 2.5(,o)C 2.5(rz) -2.5 G(ero if none w)-2.5 E(as e)-.1 E -.15(xe)-.15 G(cuted.).15 E F1 (Copr)87 189.6 Q(ocesses)-.18 E F0(A)108 201.6 Q F2(copr)3.713 E(ocess) -.45 E F0 1.213(is a shell command preceded by the)3.713 F F1(copr)3.712 E(oc)-.18 E F0(reserv)3.712 E 1.212(ed w)-.15 F 3.712(ord. A)-.1 F 1.212 (coprocess is e)3.712 F -.15(xe)-.15 G 1.212(cuted asyn-).15 F .574(chr\ onously in a subshell, as if the command had been terminated with the) 108 213.6 R F1(&)3.075 E F0 .575(control operator)3.075 F 3.075(,w)-.4 G .575(ith a tw)-3.075 F(o-)-.1 E -.1(wa)108 225.6 S 2.5(yp).1 G (ipe established between the e)-2.5 E -.15(xe)-.15 G (cuting shell and the coprocess.).15 E(The format for a coprocess is:) 108 242.4 Q F1(copr)144 259.2 Q(oc)-.18 E F0([)2.5 E F2 -.27(NA)C(ME).27 E F0(])A F2(command)2.5 E F0([)2.5 E F2 -.37(re)C(dir).37 E(ections)-.37 E F0(])A .709(This creates a coprocess named)108 276 R F2 -.27(NA)3.208 G(ME).27 E F0 5.708(.I)C(f)-5.708 E F2 -.27(NA)3.208 G(ME).27 E F0 .708 (is not supplied, the def)3.208 F .708(ault name is)-.1 F F1(COPR)3.208 E(OC)-.3 E F0(.)A F2 -.27(NA)5.708 G(ME).27 E F0 .64 (must not be supplied if)108 288 R F2(command)3.14 E F0 .64(is a)3.14 F F2 .64(simple command)3.14 F F0 .64(\(see abo)3.14 F -.15(ve)-.15 G .64 (\); otherwise, it is interpreted as the \214rst).15 F -.1(wo)108 300 S .349(rd of the simple command.).1 F .348(When the coprocess is e)5.348 F -.15(xe)-.15 G .348(cuted, the shell creates an array v).15 F .348 (ariable \(see)-.25 F F1(Ar)2.848 E(-)-.37 E(rays)108 312 Q F0(belo) 3.095 E .595(w\) named)-.25 F F2 -.27(NA)3.095 G(ME).27 E F0 .595 (in the conte)3.095 F .595(xt of the e)-.15 F -.15(xe)-.15 G .595 (cuting shell.).15 F .596(The standard output of)5.595 F F2(command) 3.296 E F0 .596(is con-)3.866 F .387 (nected via a pipe to a \214le descriptor in the e)108 324 R -.15(xe) -.15 G .387(cuting shell, and that \214le descriptor is assigned to).15 F F2 -.27(NA)2.886 G(ME).27 E F0([0].)A .57(The standard input of)108 336 R F2(command)3.27 E F0 .571 (is connected via a pipe to a \214le descriptor in the e)3.84 F -.15(xe) -.15 G .571(cuting shell, and that).15 F 1.221 (\214le descriptor is assigned to)108 348 R F2 -.27(NA)3.721 G(ME).27 E F0 3.721([1]. This)B 1.221(pipe is established before an)3.721 F 3.72 (yr)-.15 G 1.22(edirections speci\214ed by the)-3.72 F 1.58 (command \(see)108 360 R/F3 9/Times-Bold@0 SF(REDIRECTION)4.08 E F0 (belo)3.83 E 4.08(w\). The)-.25 F 1.581 (\214le descriptors can be utilized as ar)4.08 F 1.581 (guments to shell com-)-.18 F .149 (mands and redirections using standard w)108 372 R .149(ord e)-.1 F 2.649(xpansions. Other)-.15 F .148(than those created to e)2.649 F -.15 (xe)-.15 G .148(cute command and).15 F 2.462 (process substitutions, the \214le descriptors are not a)108 384 R -.25 (va)-.2 G 2.463(ilable in subshells.).25 F 2.463 (The process ID of the shell)7.463 F(spa)108 396 Q 1.115(wned to e)-.15 F -.15(xe)-.15 G 1.115(cute the coprocess is a).15 F -.25(va)-.2 G 1.115 (ilable as the v).25 F 1.115(alue of the v)-.25 F(ariable)-.25 E F2 -.27 (NA)3.615 G(ME).27 E F0 3.615(_PID. The)B F1(wait)3.615 E F0 -.2(bu) 3.615 G(iltin).2 E(command may be used to w)108 408 Q (ait for the coprocess to terminate.)-.1 E .336 (Since the coprocess is created as an asynchronous command, the)108 424.8 R F1(copr)2.836 E(oc)-.18 E F0 .336(command al)2.836 F -.1(wa)-.1 G .336(ys returns success.).1 F (The return status of a coprocess is the e)108 436.8 Q(xit status of) -.15 E F2(command)2.5 E F0(.)A F1(Shell Function De\214nitions)87 453.6 Q F0 2.698(As)108 465.6 S .198 (hell function is an object that is called lik)-2.698 F 2.698(eas)-.1 G .198(imple command and e)-2.698 F -.15(xe)-.15 G .197 (cutes a compound command with).15 F 2.5(an)108 477.6 S .5 -.25(ew s) -2.5 H(et of positional parameters.).25 E (Shell functions are declared as follo)5 E(ws:)-.25 E F2(fname)108 494.4 Q F0(\(\))2.5 E F2(compound\255command)2.5 E F0([)2.5 E F2 -.37(re)C (dir).37 E(ection)-.37 E F0(])A F1(function)108 506.4 Q F2(fname)2.5 E F0([\(\)])2.5 E F2(compound\255command)2.5 E F0([)2.5 E F2 -.37(re)C (dir).37 E(ection)-.37 E F0(])A .216(This de\214nes a function named)144 518.4 R F2(fname)2.716 E F0 5.217(.T)C .217(he reserv)-5.217 F .217 (ed w)-.15 F(ord)-.1 E F1(function)2.717 E F0 .217(is optional.)2.717 F .217(If the)5.217 F F1(function)2.717 E F0(re-)2.717 E(serv)144 530.4 Q .68(ed w)-.15 F .68(ord is supplied, the parentheses are optional.)-.1 F (The)5.68 E F2(body)3.18 E F0 .68(of the function is the compound)3.18 F (command)144 542.4 Q F2(compound\255command)2.784 E F0(\(see)3.354 E F1 .084(Compound Commands)2.584 F F0(abo)2.584 E -.15(ve)-.15 G 2.584 (\). That).15 F .084(command is usually a)2.584 F F2(list)144 554.4 Q F0 .044(of commands between { and }, b)2.544 F .044(ut may be an)-.2 F 2.544(yc)-.15 G .044(ommand listed under)-2.544 F F1 .044 (Compound Commands)2.544 F F0(abo)144 566.4 Q -.15(ve)-.15 G 2.901(,w) .15 G .401(ith one e)-2.901 F .401(xception: If the)-.15 F F1(function) 2.901 E F0(reserv)2.901 E .401(ed w)-.15 F .401(ord is used, b)-.1 F .402(ut the parentheses are not sup-)-.2 F 1.046 (plied, the braces are required.)144 578.4 R F2(compound\255command) 6.046 E F0 1.046(is e)3.546 F -.15(xe)-.15 G 1.046(cuted whene).15 F -.15(ve)-.25 G(r).15 E F2(fname)3.546 E F0 1.045(is speci\214ed as)3.546 F .365(the name of a simple command.)144 590.4 R .365(When in)5.365 F F2 .366(posix mode)2.865 F F0(,)A F2(fname)2.866 E F0 .366(must be a v) 2.866 F .366(alid shell)-.25 F F2(name)2.866 E F0 .366(and may)2.866 F .894(not be the name of one of the POSIX)144 602.4 R F2 .893(special b) 3.393 F(uiltins)-.2 E F0 5.893(.I)C 3.393(nd)-5.893 G(ef)-3.393 E .893 (ault mode, a function name can be)-.1 F(an)144 614.4 Q 3.649(yu)-.15 G 1.149(nquoted shell w)-3.649 F 1.15(ord that does not contain)-.1 F F1 ($)3.65 E F0 6.15(.A)C 1.45 -.15(ny r)-6.15 H 1.15(edirections \(see).15 F F3(REDIRECTION)3.65 E F0(belo)3.4 E(w\))-.25 E .417(speci\214ed when \ a function is de\214ned are performed when the function is e)144 626.4 R -.15(xe)-.15 G 2.916(cuted. The).15 F -.15(ex)2.916 G .416(it status).15 F .733(of a function de\214nition is zero unless a syntax error occurs \ or a readonly function with the same)144 638.4 R .178(name already e)144 650.4 R 2.678(xists. When)-.15 F -.15(exe)2.678 G .178(cuted, the e).15 F .178(xit status of a function is the e)-.15 F .177 (xit status of the last com-)-.15 F(mand e)144 662.4 Q -.15(xe)-.15 G (cuted in the body).15 E 5(.\()-.65 G(See)-5 E F3(FUNCTIONS)2.5 E F0 (belo)2.25 E -.65(w.)-.25 G(\)).65 E/F4 10.95/Times-Bold@0 SF(COMMENTS) 72 679.2 Q F0 .982(In a non-interacti)108 691.2 R 1.282 -.15(ve s)-.25 H .982(hell, or an interacti).15 F 1.282 -.15(ve s)-.25 H .982 (hell in which the).15 F F1(interacti)3.482 E -.1(ve)-.1 G(_comments).1 E F0 .982(option to the)3.482 F F1(shopt)3.482 E F0 -.2(bu)108 703.2 S .952(iltin is enabled \(see).2 F F3 .952(SHELL B)3.452 F(UIL)-.09 E .952 (TIN COMMANDS)-.828 F F0(belo)3.202 E .952(w\), a w)-.25 F .952(ord be) -.1 F .952(ginning with)-.15 F F1(#)3.451 E F0 .951(causes that w)3.451 F(ord)-.1 E .604 (and all remaining characters on that line to be ignored.)108 715.2 R .605(An interacti)5.605 F .905 -.15(ve s)-.25 H .605(hell without the) .15 F F1(interacti)3.105 E -.1(ve)-.1 G(_com-).1 E(ments)108 727.2 Q F0 1.337(option enabled does not allo)3.837 F 3.837(wc)-.25 G 3.836 (omments. The)-3.837 F F1(interacti)3.836 E -.1(ve)-.1 G(_comments).1 E F0 1.336(option is on by def)3.836 F 1.336(ault in)-.1 F(GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(7)195.395 E 0 Cg EP %%Page: 8 8 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E(interacti)108 84 Q .3 -.15(ve s)-.25 H(hells.).15 E/F1 10.95/Times-Bold@0 SF -.11(QU)72 100.8 S -.438(OT).11 G(ING).438 E/F2 10/Times-Italic@0 SF(Quoting)108 112.8 Q F0 .477(is used to remo)2.977 F .777 -.15(ve t)-.15 H .477 (he special meaning of certain characters or w).15 F .477 (ords to the shell.)-.1 F .478(Quoting can be)5.478 F .185 (used to disable special treatment for special characters, to pre)108 124.8 R -.15(ve)-.25 G .185(nt reserv).15 F .184(ed w)-.15 F .184 (ords from being recognized as)-.1 F(such, and to pre)108 136.8 Q -.15 (ve)-.25 G(nt parameter e).15 E(xpansion.)-.15 E .288(Each of the)108 153.6 R F2(metac)2.788 E(har)-.15 E(acter)-.15 E(s)-.1 E F0 .288 (listed abo)2.788 F .588 -.15(ve u)-.15 H(nder).15 E/F3 9/Times-Bold@0 SF(DEFINITIONS)2.788 E F0 .288 (has special meaning to the shell and must be)2.538 F (quoted if it is to represent itself.)108 165.6 Q 1.345 (When the command history e)108 182.4 R 1.344(xpansion f)-.15 F 1.344 (acilities are being used \(see)-.1 F F3(HIST)3.844 E(OR)-.162 E 3.594 (YE)-.315 G(XP)-3.594 E(ANSION)-.666 E F0(belo)3.594 E 1.344(w\), the) -.25 F F2(history e)108 194.4 Q(xpansion)-.2 E F0(character)2.5 E 2.5 (,u)-.4 G(sually)-2.5 E/F4 10/Times-Bold@0 SF(!)2.5 E F0 2.5(,m)C (ust be quoted to pre)-2.5 E -.15(ve)-.25 G(nt history e).15 E (xpansion.)-.15 E(There are three quoting mechanisms: the)108 211.2 Q F2 (escape c)2.69 E(har)-.15 E(acter)-.15 E F0 2.5(,s).73 G (ingle quotes, and double quotes.)-2.5 E 2.962(An)108 228 S .463 (on-quoted backslash \()-2.962 F F4(\\)A F0 2.963(\)i)C 2.963(st)-2.963 G(he)-2.963 E F2 .463(escape c)3.153 F(har)-.15 E(acter)-.15 E F0 5.463 (.I).73 G 2.963(tp)-5.463 G(reserv)-2.963 E .463(es the literal v)-.15 F .463(alue of the ne)-.25 F .463(xt character that)-.15 F(follo)108 240 Q 1.554(ws, with the e)-.25 F 1.553(xception of . If)-.25 F(a)4.053 E F4(\\)4.053 E F0( pair appears, and the backslash is not itself)-.25 F .347 (quoted, the)108 252 R F4(\\)2.847 E F0( is treated as a line continuation \(that is, it is remo)-.25 F -.15(ve)-.15 G 2.848(df).15 G .348(rom the input stream and ef-)-2.848 F (fecti)108 264 Q -.15(ve)-.25 G(ly ignored\).).15 E .295 (Enclosing characters in single quotes preserv)108 280.8 R .295 (es the literal v)-.15 F .295(alue of each character within the quotes.) -.25 F 2.795(As)5.295 G(in-)-2.795 E (gle quote may not occur between single quotes, e)108 292.8 Q -.15(ve) -.25 G 2.5(nw).15 G(hen preceded by a backslash.)-2.5 E .033 (Enclosing characters in double quotes preserv)108 309.6 R .034 (es the literal v)-.15 F .034 (alue of all characters within the quotes, with the)-.25 F -.15(ex)108 321.6 S .108(ception of).15 F F4($)2.608 E F0(,)A F4<92>2.608 E F0(,)A F4(\\)2.608 E F0 2.608(,a)C .107(nd, when history e)-2.608 F .107 (xpansion is enabled,)-.15 F F4(!)2.607 E F0 5.107(.W)C .107 (hen the shell is in)-5.107 F F2 .107(posix mode)2.607 F F0 2.607(,t)C (he)-2.607 E F4(!)2.607 E F0 .107(has no)2.607 F .46 (special meaning within double quotes, e)108 333.6 R -.15(ve)-.25 G 2.96 (nw).15 G .46(hen history e)-2.96 F .46(xpansion is enabled.)-.15 F .46 (The characters)5.46 F F4($)2.96 E F0(and)2.96 E F4<92>2.96 E F0(re-) 2.96 E .563(tain their special meaning within double quotes.)108 345.6 R .562(The backslash retains its special meaning only when fol-)5.563 F (lo)108 357.6 Q .601(wed by one of the follo)-.25 F .602 (wing characters:)-.25 F F4($)3.102 E F0(,)A F4<92>3.102 E F0(,)A F4(") 3.935 E F0(,).833 E F4(\\)3.102 E F0 3.102(,o)C(r)-3.102 E F4() 3.102 E F0 5.602(.A)C .602(double quote may be quoted within)-2.5 F .131 (double quotes by preceding it with a backslash.)108 369.6 R .131 (If enabled, history e)5.131 F .13(xpansion will be performed unless an) -.15 F F4(!)2.63 E F0 (appearing in double quotes is escaped using a backslash.)108 381.6 Q (The backslash preceding the)5 E F4(!)2.5 E F0(is not remo)5 E -.15(ve) -.15 G(d.).15 E(The special parameters)108 398.4 Q F4(*)2.5 E F0(and)2.5 E F4(@)2.5 E F0(ha)2.5 E .3 -.15(ve s)-.2 H (pecial meaning when in double quotes \(see).15 E F3 -.666(PA)2.5 G (RAMETERS).666 E F0(belo)2.25 E(w\).)-.25 E -.8(Wo)108 415.2 S .211 (rds of the form).8 F F4($)2.711 E F0<08>A F2(string)A F0 2.711<0861>C .211(re treated specially)-2.711 F 5.211(.T)-.65 G .211(he w)-5.211 F .211(ord e)-.1 F .212(xpands to)-.15 F F2(string)2.712 E F0 2.712(,w)C .212(ith backslash-escaped char)-2.712 F(-)-.2 E .605 (acters replaced as speci\214ed by the ANSI C standard.)108 427.2 R .604 (Backslash escape sequences, if present, are decoded)5.605 F(as follo) 108 439.2 Q(ws:)-.25 E F4(\\a)144 451.2 Q F0(alert \(bell\))180 451.2 Q F4(\\b)144 463.2 Q F0(backspace)180 463.2 Q F4(\\e)144 475.2 Q(\\E)144 487.2 Q F0(an escape character)180 487.2 Q F4(\\f)144 499.2 Q F0 (form feed)180 499.2 Q F4(\\n)144 511.2 Q F0(ne)180 511.2 Q 2.5(wl)-.25 G(ine)-2.5 E F4(\\r)144 523.2 Q F0(carriage return)180 523.2 Q F4(\\t) 144 535.2 Q F0(horizontal tab)180 535.2 Q F4(\\v)144 547.2 Q F0 -.15(ve) 180 547.2 S(rtical tab).15 E F4(\\\\)144 559.2 Q F0(backslash)180 559.2 Q F4<5c08>144 571.2 Q F0(single quote)180 571.2 Q F4(\\")144 583.2 Q F0 (double quote)180 583.2 Q F4(\\?)144 595.2 Q F0(question mark)180 595.2 Q F4(\\)144 607.2 Q F2(nnn)A F0(the eight-bit character whose v)180 607.2 Q(alue is the octal v)-.25 E(alue)-.25 E F2(nnn)2.5 E F0 (\(one to three octal digits\))2.5 E F4(\\x)144 619.2 Q F2(HH)A F0 (the eight-bit character whose v)180 619.2 Q(alue is the he)-.25 E (xadecimal v)-.15 E(alue)-.25 E F2(HH)2.5 E F0(\(one or tw)2.5 E 2.5(oh) -.1 G .3 -.15(ex d)-2.5 H(igits\)).15 E F4(\\u)144 631.2 Q F2(HHHH)A F0 1.506(the Unicode \(ISO/IEC 10646\) character whose v)180 643.2 R 1.507 (alue is the he)-.25 F 1.507(xadecimal v)-.15 F(alue)-.25 E F2(HHHH) 4.007 E F0(\(one to four he)180 655.2 Q 2.5(xd)-.15 G(igits\))-2.5 E F4 (\\U)144 667.2 Q F2(HHHHHHHH)A F0 .548 (the Unicode \(ISO/IEC 10646\) character whose v)180 679.2 R .547 (alue is the he)-.25 F .547(xadecimal v)-.15 F(alue)-.25 E F2(HHHHH-) 3.047 E(HHH)180 691.2 Q F0(\(one to eight he)2.5 E 2.5(xd)-.15 G (igits\))-2.5 E F4(\\c)144 703.2 Q F2(x)A F0 2.5(ac)180 703.2 S(ontrol-) -2.5 E F2(x)A F0(character)2.5 E(The e)108 720 Q(xpanded result is sing\ le-quoted, as if the dollar sign had not been present.)-.15 E (GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(8)195.395 E 0 Cg EP %%Page: 9 9 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E 2.64(Ad)108 84 S .14(ouble-quoted string preceded by a dollar sign \()-2.64 F/F1 10 /Times-Bold@0 SF($)A F0(")A/F2 10/Times-Italic@0 SF(string)A F0 .14 ("\) will cause the string to be translated according)B .31 (to the current locale.)108 96 R(The)5.31 E F2 -.1(ge)2.809 G(tte).1 E (xt)-.2 E F0 .309(infrastructure performs the message catalog lookup an\ d translation, using)2.809 F(the)108 108 Q F1(LC_MESSA)2.625 E(GES)-.55 E F0(and)2.625 E F1(TEXTDOMAIN)2.625 E F0 .125(shell v)2.625 F 2.625 (ariables. If)-.25 F .126(the current locale is)2.626 F F1(C)2.626 E F0 (or)2.626 E F1(POSIX)2.626 E F0 2.626(,o)C 2.626(ri)-2.626 G 2.626(ft) -2.626 G(here)-2.626 E .362(are no translations a)108 120 R -.25(va)-.2 G .362(ilable, the dollar sign is ignored.).25 F .362 (If the string is translated and replaced, the replace-)5.362 F (ment is double-quoted.)108 132 Q/F3 10.95/Times-Bold@0 SF -.81(PA)72 148.8 S(RAMETERS).81 E F0(A)108 160.8 Q F2(par)4.574 E(ameter)-.15 E F0 .824(is an entity that stores v)4.054 F 3.324(alues. It)-.25 F .824 (can be a)3.324 F F2(name)3.685 E F0 3.325(,an).18 G(umber)-3.325 E 3.325(,o)-.4 G 3.325(ro)-3.325 G .825(ne of the special characters) -3.325 F .802(listed belo)108 172.8 R 3.302(wu)-.25 G(nder)-3.302 E F1 .802(Special P)3.302 F(arameters)-.1 E F0 5.802(.A)C F2(variable)-2.21 E F0 .802(is a parameter denoted by a)3.482 F F2(name)3.662 E F0 5.801(.A) .18 G -.25(va)-2.5 G .801(riable has a).25 F F2(value)108 184.8 Q F0 .368(and zero or more)2.868 F F2(attrib)2.868 E(utes)-.2 E F0 5.369(.A)C (ttrib)-5.369 E .369(utes are assigned using the)-.2 F F1(declar)2.869 E (e)-.18 E F0 -.2(bu)2.869 G .369(iltin command \(see).2 F F1(declar) 2.869 E(e)-.18 E F0(belo)108 196.8 Q 2.5(wi)-.25 G(n)-2.5 E/F4 9 /Times-Bold@0 SF(SHELL B)2.5 E(UIL)-.09 E(TIN COMMANDS)-.828 E/F5 9 /Times-Roman@0 SF(\).)A F0 2.755(Ap)108 213.6 S .255 (arameter is set if it has been assigned a v)-2.755 F 2.754(alue. The) -.25 F .254(null string is a v)2.754 F .254(alid v)-.25 F 2.754 (alue. 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If) -.25 F .198(the v)2.698 F .198(ariable has its)-.25 F F1(integer)2.698 E F0(attrib)2.698 E .198(ute set, then)-.2 F F2(value)2.988 E F0 .198 (is e)2.878 F -.25(va)-.25 G .199(luated as an arithmetic e).25 F .199 (xpression e)-.15 F -.15(ve)-.25 G(n).15 E .902(if the $\(\(...\)\) e) 108 312 R .902(xpansion is not used \(see)-.15 F F1 .901 (Arithmetic Expansion)3.401 F F0(belo)3.401 E 3.401(w\). W)-.25 F .901 (ord splitting is not performed,)-.8 F 1.178(with the e)108 324 R 1.178 (xception of)-.15 F F1("$@")3.678 E F0 1.178(as e)3.678 F 1.179 (xplained belo)-.15 F 3.679(wu)-.25 G(nder)-3.679 E F1 1.179(Special P) 3.679 F(arameters)-.1 E F0 6.179(.P)C 1.179(athname e)-6.329 F 1.179 (xpansion is not)-.15 F 3.649(performed. Assignment)108 336 R 1.149 (statements may also appear as ar)3.649 F 1.148(guments to the)-.18 F F1 (alias)3.648 E F0(,)A F1(declar)3.648 E(e)-.18 E F0(,)A F1(typeset)3.648 E F0(,)A F1(export)3.648 E F0(,)A F1 -.18(re)108 348 S(adonly).18 E F0 3.288(,a)C(nd)-3.288 E F1(local)3.288 E F0 -.2(bu)3.288 G .788 (iltin commands \().2 F F2(declar)A(ation)-.15 E F0 3.288 (commands\). When)3.288 F(in)3.289 E F2 .789(posix mode)3.289 F F0 3.289 (,t)C .789(hese b)-3.289 F .789(uiltins may)-.2 F 1.496 (appear in a command after one or more instances of the)108 360 R F1 (command)3.996 E F0 -.2(bu)3.996 G 1.496 (iltin and retain these assignment).2 F(statement properties.)108 372 Q .376(In the conte)108 388.8 R .376 (xt where an assignment statement is assigning a v)-.15 F .376 (alue to a shell v)-.25 F .377(ariable or array inde)-.25 F .377 (x, the +=)-.15 F 1.631 (operator can be used to append to or add to the v)108 400.8 R(ariable') -.25 E 4.13(sp)-.55 G(re)-4.13 E 1.63(vious v)-.25 F 4.13(alue. This) -.25 F 1.63(includes ar)4.13 F 1.63(guments to)-.18 F -.2(bu)108 412.8 S .163(iltin commands such as).2 F F1(declar)2.664 E(e)-.18 E F0 .164 (that accept assignment statements \()2.664 F F2(declar)A(ation)-.15 E F0 2.664(commands\). When)2.664 F .164(+= is)2.664 F .252 (applied to a v)108 424.8 R .252(ariable for which the)-.25 F F2(inte) 2.752 E -.1(ge)-.4 G(r).1 E F0(attrib)2.752 E .252(ute has been set,)-.2 F F2(value)2.752 E F0 .251(is e)2.751 F -.25(va)-.25 G .251 (luated as an arithmetic e).25 F(xpres-)-.15 E .05 (sion and added to the v)108 436.8 R(ariable')-.25 E 2.55(sc)-.55 G .05 (urrent v)-2.55 F .05(alue, which is also e)-.25 F -.25(va)-.25 G 2.55 (luated. When).25 F .05(+= is applied to an array v)2.55 F(ari-)-.25 E .459(able using compound assignment \(see)108 448.8 R F1(Arrays)2.959 E F0(belo)2.959 E .459(w\), the v)-.25 F(ariable')-.25 E 2.959(sv)-.55 G .459(alue is not unset \(as it is when using)-3.209 F .265(=\), and ne) 108 460.8 R 2.765(wv)-.25 G .265(alues are appended to the array be) -3.015 F .265(ginning at one greater than the array')-.15 F 2.765(sm) -.55 G .265(aximum inde)-2.765 F 2.765(x\()-.15 G(for)-2.765 E(inde)108 472.8 Q -.15(xe)-.15 G 3.402(da).15 G .902 (rrays\) or added as additional k)-3.402 F -.15(ey)-.1 G.15 E .901 (alue pairs in an associati)-.25 F 1.201 -.15(ve a)-.25 H(rray).15 E 5.901(.W)-.65 G .901(hen applied to a string-)-5.901 F -.25(va)108 484.8 S(lued v).25 E(ariable,)-.25 E F2(value)2.5 E F0(is e)2.5 E (xpanded and appended to the v)-.15 E(ariable')-.25 E 2.5(sv)-.55 G (alue.)-2.75 E 3.382(Av)108 501.6 S .882(ariable can be assigned the) -3.632 F F2(namer)3.382 E(ef)-.37 E F0(attrib)3.382 E .882 (ute using the)-.2 F F13.382 E F0 .882(option to the)3.382 F F1 (declar)3.382 E(e)-.18 E F0(or)3.383 E F1(local)3.383 E F0 -.2(bu)3.383 G .883(iltin com-).2 F .316(mands \(see the descriptions of)108 513.6 R F1(declar)2.816 E(e)-.18 E F0(and)2.816 E F1(local)2.816 E F0(belo)2.816 E .316(w\) to create a)-.25 F F2(namer)2.815 E(ef)-.37 E F0 2.815(,o)C 2.815(rar)-2.815 G .315(eference to another v)-2.815 F(ari-)-.25 E 2.918 (able. This)108 525.6 R(allo)2.918 E .418(ws v)-.25 F .418 (ariables to be manipulated indirectly)-.25 F 5.419(.W)-.65 G(hene) -5.419 E -.15(ve)-.25 G 2.919(rt).15 G .419(he nameref v)-2.919 F .419 (ariable is referenced, as-)-.25 F .133 (signed to, unset, or has its attrib)108 537.6 R .132 (utes modi\214ed \(other than using or changing the)-.2 F F2(namer)2.632 E(ef)-.37 E F0(attrib)2.632 E .132(ute itself\), the)-.2 F 1.356 (operation is actually performed on the v)108 549.6 R 1.357 (ariable speci\214ed by the nameref v)-.25 F(ariable')-.25 E 3.857(sv) -.55 G 3.857(alue. A)-4.107 F 1.357(nameref is)3.857 F .972 (commonly used within shell functions to refer to a v)108 561.6 R .971 (ariable whose name is passed as an ar)-.25 F .971(gument to the)-.18 F 2.5(function. F)108 573.6 R(or instance, if a v)-.15 E (ariable name is passed to a shell function as its \214rst ar)-.25 E (gument, running)-.18 E/F6 10/Courier@0 SF(declare -n ref=$1)144 591.6 Q F0 .302(inside the function creates a nameref v)108 609.6 R(ariable)-.25 E F1 -.18(re)2.803 G(f).18 E F0 .303(whose v)2.803 F .303(alue is the v) -.25 F .303(ariable name passed as the \214rst ar)-.25 F(gu-)-.18 E 3.592(ment. References)108 621.6 R 1.092(and assignments to)3.592 F F1 -.18(re)3.592 G(f).18 E F0 3.592(,a)C 1.092(nd changes to its attrib) -3.592 F 1.092(utes, are treated as references, assign-)-.2 F .143 (ments, and attrib)108 633.6 R .144(ute modi\214cations to the v)-.2 F .144(ariable whose name w)-.25 F .144(as passed as)-.1 F F1($1)2.644 E F0 5.144(.I)C 2.644(ft)-5.144 G .144(he control v)-2.644 F .144 (ariable in a)-.25 F F1 -.25(fo)108 645.6 S(r).25 E F0 .868 (loop has the nameref attrib)3.368 F .868(ute, the list of w)-.2 F .867 (ords can be a list of shell v)-.1 F .867 (ariables, and a name reference)-.25 F .509 (will be established for each w)108 657.6 R .509 (ord in the list, in turn, when the loop is e)-.1 F -.15(xe)-.15 G 3.009 (cuted. Array).15 F -.25(va)3.009 G .509(riables cannot be).25 F(gi)108 669.6 Q -.15(ve)-.25 G 3.032(nt).15 G(he)-3.032 E F1(namer)3.032 E(ef) -.18 E F0(attrib)3.032 E 3.032(ute. Ho)-.2 F(we)-.25 E -.15(ve)-.25 G 1.332 -.4(r, n).15 H .532(ameref v).4 F .531 (ariables can reference array v)-.25 F .531(ariables and subscripted ar) -.25 F(-)-.2 E .533(ray v)108 681.6 R 3.033(ariables. Namerefs)-.25 F .533(can be unset using the)3.033 F F13.033 E F0 .533 (option to the)3.033 F F1(unset)3.033 E F0 -.2(bu)3.034 G 3.034 (iltin. Otherwise,).2 F(if)3.034 E F1(unset)3.034 E F0 .534(is e)3.034 F -.15(xe)-.15 G(-).15 E .443(cuted with the name of a nameref v)108 693.6 R .442(ariable as an ar)-.25 F .442(gument, the v)-.18 F .442 (ariable referenced by the nameref v)-.25 F(ariable)-.25 E (will be unset.)108 705.6 Q(GNU Bash 5.1)72 768 Q(2020 October 29) 141.235 E(9)195.395 E 0 Cg EP %%Page: 10 10 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10/Times-Bold@0 SF -.2(Po)87 84 S(sitional P).2 E(arameters)-.1 E F0(A)108 96 Q/F2 10 /Times-Italic@0 SF .705(positional par)4.455 F(ameter)-.15 E F0 .706(is\ a parameter denoted by one or more digits, other than the single digit\ 0.)3.935 F(Posi-)5.706 E .445 (tional parameters are assigned from the shell')108 108 R 2.944(sa)-.55 G -.18(rg)-2.944 G .444(uments when it is in).18 F -.2(vo)-.4 G -.1(ke) .2 G .444(d, and may be reassigned using).1 F(the)108 120 Q F1(set)3.333 E F0 -.2(bu)3.333 G .833(iltin command.).2 F .834(Positional parameters\ may not be assigned to with assignment statements.)5.833 F(The)5.834 E (positional parameters are temporarily replaced when a shell function i\ s e)108 132 Q -.15(xe)-.15 G(cuted \(see).15 E/F3 9/Times-Bold@0 SF (FUNCTIONS)2.5 E F0(belo)2.25 E(w\).)-.25 E 1.404(When a positional par\ ameter consisting of more than a single digit is e)108 148.8 R 1.403 (xpanded, it must be enclosed in)-.15 F(braces \(see)108 160.8 Q F3(EXP) 2.5 E(ANSION)-.666 E F0(belo)2.25 E(w\).)-.25 E F1(Special P)87 177.6 Q (arameters)-.1 E F0 1.674(The shell treats se)108 189.6 R -.15(ve)-.25 G 1.674(ral parameters specially).15 F 6.675(.T)-.65 G 1.675 (hese parameters may only be referenced; assignment to)-6.675 F (them is not allo)108 201.6 Q(wed.)-.25 E F1(*)108 213.6 Q F0 .224 (Expands to the positional parameters, starting from one.)144 213.6 R .223(When the e)5.224 F .223(xpansion is not within double)-.15 F .662 (quotes, each positional parameter e)144 225.6 R .662 (xpands to a separate w)-.15 F 3.162(ord. In)-.1 F(conte)3.162 E .662 (xts where it is performed,)-.15 F 1.082(those w)144 237.6 R 1.082 (ords are subject to further w)-.1 F 1.081(ord splitting and pathname e) -.1 F 3.581(xpansion. When)-.15 F 1.081(the e)3.581 F(xpansion)-.15 E .914(occurs within double quotes, it e)144 249.6 R .914 (xpands to a single w)-.15 F .915(ord with the v)-.1 F .915 (alue of each parameter sepa-)-.25 F .891 (rated by the \214rst character of the)144 261.6 R F3(IFS)3.39 E F0 .89 (special v)3.14 F 3.39(ariable. That)-.25 F .89(is, ")3.39 F F1($*)A F0 3.39("i)C 3.39(se)-3.39 G(qui)-3.39 E -.25(va)-.25 G .89(lent to ").25 F F1($1)A F2(c)A F1($2)A F2(c)A F1(...)A F0(",)A(where)144 273.6 Q F2(c) 3.532 E F0 .832(is the \214rst character of the v)3.642 F .832 (alue of the)-.25 F F3(IFS)3.332 E F0 -.25(va)3.082 G 3.332(riable. If) .25 F F3(IFS)3.332 E F0 .833(is unset, the parameters are)3.082 F (separated by spaces.)144 285.6 Q(If)5 E F3(IFS)2.5 E F0 (is null, the parameters are joined without interv)2.25 E (ening separators.)-.15 E F1(@)108 297.6 Q F0 .722 (Expands to the positional parameters, starting from one.)144 297.6 R .722(In conte)5.722 F .722(xts where w)-.15 F .722(ord splitting is per) -.1 F(-)-.2 E 1.165(formed, this e)144 309.6 R 1.165 (xpands each positional parameter to a separate w)-.15 F 1.165 (ord; if not within double quotes,)-.1 F .655(these w)144 321.6 R .655 (ords are subject to w)-.1 F .655(ord splitting.)-.1 F .655(In conte) 5.655 F .655(xts where w)-.15 F .654 (ord splitting is not performed, this)-.1 F -.15(ex)144 333.6 S .748 (pands to a single w).15 F .748 (ord with each positional parameter separated by a space.)-.1 F .748 (When the e)5.748 F(xpan-)-.15 E 1.091 (sion occurs within double quotes, each parameter e)144 345.6 R 1.091 (xpands to a separate w)-.15 F 3.59(ord. That)-.1 F 1.09(is, ")3.59 F F1 ($@)A F0 3.59("i)C(s)-3.59 E(equi)144 357.6 Q -.25(va)-.25 G .412 (lent to ").25 F F1($1)A F0 2.912("")C F1($2)-2.912 E F0 2.912(".)C 2.912(.. If)-2.912 F .413(the double-quoted e)2.913 F .413 (xpansion occurs within a w)-.15 F .413(ord, the e)-.1 F .413 (xpansion of)-.15 F .38(the \214rst parameter is joined with the be)144 369.6 R .379(ginning part of the original w)-.15 F .379(ord, and the e) -.1 F .379(xpansion of the)-.15 F .771 (last parameter is joined with the last part of the original w)144 381.6 R 3.271(ord. When)-.1 F .772(there are no positional pa-)3.271 F (rameters, ")144 393.6 Q F1($@)A F0 2.5("a)C(nd)-2.5 E F1($@)2.5 E F0 -.15(ex)2.5 G(pand to nothing \(i.e., the).15 E 2.5(ya)-.15 G(re remo) -2.5 E -.15(ve)-.15 G(d\).).15 E F1(#)108 405.6 Q F0 (Expands to the number of positional parameters in decimal.)144 405.6 Q F1(?)108 417.6 Q F0(Expands to the e)144 417.6 Q (xit status of the most recently e)-.15 E -.15(xe)-.15 G(cuted fore).15 E(ground pipeline.)-.15 E F1108 429.6 Q F0 .882 (Expands to the current option \215ags as speci\214ed upon in)144 429.6 R -.2(vo)-.4 G .881(cation, by the).2 F F1(set)3.381 E F0 -.2(bu)3.381 G .881(iltin command, or).2 F(those set by the shell itself \(such as the) 144 441.6 Q F12.5 E F0(option\).)2.5 E F1($)108 453.6 Q F0 .214 (Expands to the process ID of the shell.)144 453.6 R .214 (In a \(\) subshell, it e)5.214 F .214 (xpands to the process ID of the current)-.15 F (shell, not the subshell.)144 465.6 Q F1(!)108 477.6 Q F0 .499(Expands \ to the process ID of the job most recently placed into the background, \ whether e)144 477.6 R -.15(xe)-.15 G(cuted).15 E (as an asynchronous command or using the)144 489.6 Q F1(bg)2.5 E F0 -.2 (bu)2.5 G(iltin \(see).2 E F3(JOB CONTR)2.5 E(OL)-.27 E F0(belo)2.25 E (w\).)-.25 E F1(0)108 501.6 Q F0 .886 (Expands to the name of the shell or shell script.)144 501.6 R .886 (This is set at shell initialization.)5.886 F(If)5.887 E F1(bash)3.387 E F0 .887(is in-)3.387 F -.2(vo)144 513.6 S -.1(ke).2 G 2.668(dw).1 G .168 (ith a \214le of commands,)-2.668 F F1($0)2.668 E F0 .167 (is set to the name of that \214le.)2.667 F(If)5.167 E F1(bash)2.667 E F0 .167(is started with the)2.667 F F12.667 E F0(op-)2.667 E .895 (tion, then)144 525.6 R F1($0)3.395 E F0 .895(is set to the \214rst ar) 3.395 F .895(gument after the string to be e)-.18 F -.15(xe)-.15 G .896 (cuted, if one is present.).15 F(Other)5.896 E(-)-.2 E (wise, it is set to the \214lename used to in)144 537.6 Q -.2(vo)-.4 G -.1(ke).2 G F1(bash)2.6 E F0 2.5(,a)C 2.5(sg)-2.5 G -2.15 -.25(iv e)-2.5 H 2.5(nb).25 G 2.5(ya)-2.5 G -.18(rg)-2.5 G(ument zero.).18 E F1 (Shell V)87 554.4 Q(ariables)-.92 E F0(The follo)108 566.4 Q(wing v)-.25 E(ariables are set by the shell:)-.25 E F1(_)108 583.2 Q F0 1.526 (At shell startup, set to the pathname used to in)144 583.2 R -.2(vo)-.4 G 1.725 -.1(ke t).2 H 1.525(he shell or shell script being e).1 F -.15 (xe)-.15 G 1.525(cuted as).15 F .173(passed in the en)144 595.2 R .173 (vironment or ar)-.4 F .173(gument list.)-.18 F(Subsequently)5.173 E 2.673(,e)-.65 G .173(xpands to the last ar)-2.823 F .174 (gument to the pre-)-.18 F .337(vious simple command e)144 607.2 R -.15 (xe)-.15 G .337(cuted in the fore).15 F .336(ground, after e)-.15 F 2.836(xpansion. Also)-.15 F .336(set to the full pathname)2.836 F .365 (used to in)144 619.2 R -.2(vo)-.4 G .565 -.1(ke e).2 H .365 (ach command e).1 F -.15(xe)-.15 G .366(cuted and placed in the en).15 F .366(vironment e)-.4 F .366(xported to that command.)-.15 F(When checki\ ng mail, this parameter holds the name of the mail \214le currently bei\ ng check)144 631.2 Q(ed.)-.1 E F1 -.3(BA)108 643.2 S(SH).3 E F0 (Expands to the full \214lename used to in)144 643.2 Q -.2(vo)-.4 G .2 -.1(ke t).2 H(his instance of).1 E F1(bash)2.5 E F0(.)A F1 -.3(BA)108 655.2 S(SHOPTS).3 E F0 2.549(Ac)144 667.2 S .049 (olon-separated list of enabled shell options.)-2.549 F .049(Each w) 5.049 F .049(ord in the list is a v)-.1 F .049(alid ar)-.25 F .049 (gument for the)-.18 F F12.548 E F0 .115(option to the)144 679.2 R F1(shopt)2.616 E F0 -.2(bu)2.616 G .116(iltin command \(see).2 F F3 .116 (SHELL B)2.616 F(UIL)-.09 E .116(TIN COMMANDS)-.828 F F0(belo)2.366 E 2.616(w\). The)-.25 F .116(options ap-)2.616 F 1.067(pearing in)144 691.2 R F3 -.27(BA)3.567 G(SHOPTS).27 E F0 1.067(are those reported as) 3.317 F F2(on)3.797 E F0(by)3.807 E F1(shopt)3.567 E F0 6.066(.I)C 3.566 (ft)-6.066 G 1.066(his v)-3.566 F 1.066(ariable is in the en)-.25 F (vironment)-.4 E(when)144 703.2 Q F1(bash)3.141 E F0 .642(starts up, ea\ ch shell option in the list will be enabled before reading an)3.141 F 3.142(ys)-.15 G .642(tartup \214les.)-3.142 F(This v)144 715.2 Q (ariable is read-only)-.25 E(.)-.65 E(GNU Bash 5.1)72 768 Q (2020 October 29)141.235 E(10)190.395 E 0 Cg EP %%Page: 11 11 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10/Times-Bold@0 SF -.3(BA)108 84 S(SHPID).3 E F0 .188 (Expands to the process ID of the current)144 96 R F1(bash)2.688 E F0 2.687(process. This)2.687 F(dif)2.687 E .187(fers from)-.25 F F1($$) 2.687 E F0 .187(under certain circum-)2.687 F .548 (stances, such as subshells that do not require)144 108 R F1(bash)3.048 E F0 .548(to be re-initialized.)3.048 F .549(Assignments to)5.549 F/F2 9 /Times-Bold@0 SF -.27(BA)3.049 G(SHPID).27 E F0(ha)144 120 Q .3 -.15 (ve n)-.2 H 2.5(oe).15 G -.25(ff)-2.5 G 2.5(ect. If).25 F F1 -.3(BA)2.5 G(SHPID).3 E F0(is unset, it loses its special properties, e)2.5 E -.15 (ve)-.25 G 2.5(ni).15 G 2.5(fi)-2.5 G 2.5(ti)-2.5 G 2.5(ss)-2.5 G (ubsequently reset.)-2.5 E F1 -.3(BA)108 132 S(SH_ALIASES).3 E F0 1.195 (An associati)144 144 R 1.495 -.15(ve a)-.25 H 1.195(rray v).15 F 1.195 (ariable whose members correspond to the internal list of aliases as ma\ in-)-.25 F .16(tained by the)144 156 R F1(alias)2.66 E F0 -.2(bu)2.66 G 2.66(iltin. Elements).2 F .16 (added to this array appear in the alias list; ho)2.66 F(we)-.25 E -.15 (ve)-.25 G .96 -.4(r, u).15 H(nsetting).4 E 4.503 (array elements currently does not cause aliases to be remo)144 168 R -.15(ve)-.15 G 7.003(df).15 G 4.503(rom the alias list.)-7.003 F(If) 9.502 E F1 -.3(BA)144 180 S(SH_ALIASES).3 E F0 (is unset, it loses its special properties, e)2.5 E -.15(ve)-.25 G 2.5 (ni).15 G 2.5(fi)-2.5 G 2.5(ti)-2.5 G 2.5(ss)-2.5 G(ubsequently reset.) -2.5 E F1 -.3(BA)108 192 S(SH_ARGC).3 E F0 .934(An array v)144 204 R .934(ariable whose v)-.25 F .934 (alues are the number of parameters in each frame of the current)-.25 F F1(bash)3.435 E F0 -.15(exe)144 216 S .535(cution call stack.).15 F .535 (The number of parameters to the current subroutine \(shell function or\ script)5.535 F -.15(exe)144 228 S .141(cuted with).15 F F1(.)2.641 E F0 (or)2.641 E F1(sour)2.641 E(ce)-.18 E F0 2.641(\)i)C 2.641(sa)-2.641 G 2.641(tt)-2.641 G .142(he top of the stack.)-2.641 F .142 (When a subroutine is e)5.142 F -.15(xe)-.15 G .142 (cuted, the number of).15 F 1.265(parameters passed is pushed onto)144 240 R F2 -.27(BA)3.765 G(SH_ARGC).27 E/F3 9/Times-Roman@0 SF(.)A F0 1.265(The shell sets)5.765 F F2 -.27(BA)3.765 G(SH_ARGC).27 E F0 1.265 (only when in e)3.515 F(x-)-.15 E .947(tended deb)144 252 R .947 (ugging mode \(see the description of the)-.2 F F1(extdeb)3.447 E(ug)-.2 E F0 .947(option to the)3.447 F F1(shopt)3.447 E F0 -.2(bu)3.448 G .948 (iltin belo).2 F(w\).)-.25 E(Setting)144 264 Q F1(extdeb)3.363 E(ug)-.2 E F0 .863(after the shell has started to e)3.363 F -.15(xe)-.15 G .862 (cute a script, or referencing this v).15 F .862(ariable when)-.25 F F1 (extdeb)144 276 Q(ug)-.2 E F0(is not set, may result in inconsistent v) 2.5 E(alues.)-.25 E F1 -.3(BA)108 288 S(SH_ARGV).3 E F0 .206(An array v) 144 300 R .206(ariable containing all of the parameters in the current) -.25 F F1(bash)2.706 E F0 -.15(exe)2.706 G .207(cution call stack.).15 F .207(The \214-)5.207 F .567(nal parameter of the last subroutine call i\ s at the top of the stack; the \214rst parameter of the initial)144 312 R 1.424(call is at the bottom.)144 324 R 1.424(When a subroutine is e) 6.424 F -.15(xe)-.15 G 1.424 (cuted, the parameters supplied are pushed onto).15 F F2 -.27(BA)144 336 S(SH_ARGV).27 E F3(.)A F0 .854(The shell sets)5.354 F F2 -.27(BA)3.354 G (SH_ARGV).27 E F0 .853(only when in e)3.104 F .853(xtended deb)-.15 F .853(ugging mode \(see the de-)-.2 F .475(scription of the)144 348 R F1 (extdeb)2.975 E(ug)-.2 E F0 .475(option to the)2.975 F F1(shopt)2.975 E F0 -.2(bu)2.975 G .475(iltin belo).2 F 2.975(w\). Setting)-.25 F F1 (extdeb)2.976 E(ug)-.2 E F0 .476(after the shell has)2.976 F .45 (started to e)144 360 R -.15(xe)-.15 G .45 (cute a script, or referencing this v).15 F .45(ariable when)-.25 F F1 (extdeb)2.95 E(ug)-.2 E F0 .45(is not set, may result in in-)2.95 F (consistent v)144 372 Q(alues.)-.25 E F1 -.3(BA)108 384 S(SH_ARGV0).3 E F0 .25(When referenced, this v)144 396 R .25(ariable e)-.25 F .251 (xpands to the name of the shell or shell script \(identical to)-.15 F F1($0)2.751 E F0 2.751(;s)C(ee)-2.751 E .041 (the description of special parameter 0 abo)144 408 R -.15(ve)-.15 G 2.541(\). Assignment).15 F(to)2.541 E F1 -.3(BA)2.541 G(SH_ARGV0).3 E F0 .04(causes the v)2.541 F .04(alue as-)-.25 F .216 (signed to also be assigned to)144 420 R F1($0)2.716 E F0 5.216(.I)C(f) -5.216 E F1 -.3(BA)2.716 G(SH_ARGV0).3 E F0 .216 (is unset, it loses its special properties, e)2.716 F -.15(ve)-.25 G 2.716(ni).15 G(f)-2.716 E(it is subsequently reset.)144 432 Q F1 -.3(BA) 108 444 S(SH_CMDS).3 E F0 .668(An associati)144 456 R .968 -.15(ve a) -.25 H .668(rray v).15 F .668(ariable whose members correspond to the i\ nternal hash table of commands)-.25 F .195(as maintained by the)144 468 R F1(hash)2.695 E F0 -.2(bu)2.695 G 2.695(iltin. Elements).2 F .196 (added to this array appear in the hash table; ho)2.696 F(we)-.25 E -.15 (ve)-.25 G -.4(r,).15 G .852(unsetting array elements currently does no\ t cause command names to be remo)144 480 R -.15(ve)-.15 G 3.352(df).15 G .852(rom the hash)-3.352 F 2.5(table. If)144 492 R F1 -.3(BA)2.5 G (SH_CMDS).3 E F0(is unset, it loses its special properties, e)2.5 E -.15 (ve)-.25 G 2.5(ni).15 G 2.5(fi)-2.5 G 2.5(ti)-2.5 G 2.5(ss)-2.5 G (ubsequently reset.)-2.5 E F1 -.3(BA)108 504 S(SH_COMMAND).3 E F0 1.242 (The command currently being e)144 516 R -.15(xe)-.15 G 1.243 (cuted or about to be e).15 F -.15(xe)-.15 G 1.243 (cuted, unless the shell is e).15 F -.15(xe)-.15 G 1.243(cuting a).15 F .263(command as the result of a trap, in which case it is the command e) 144 528 R -.15(xe)-.15 G .262(cuting at the time of the trap.).15 F(If) 144 540 Q F1 -.3(BA)2.5 G(SH_COMMAND).3 E F0 (is unset, it loses its special properties, e)2.5 E -.15(ve)-.25 G 2.5 (ni).15 G 2.5(fi)-2.5 G 2.5(ti)-2.5 G 2.5(ss)-2.5 G(ubsequently reset.) -2.5 E F1 -.3(BA)108 552 S(SH_EXECUTION_STRING).3 E F0(The command ar) 144 564 Q(gument to the)-.18 E F12.5 E F0(in)2.5 E -.2(vo)-.4 G (cation option.).2 E F1 -.3(BA)108 576 S(SH_LINENO).3 E F0 .692 (An array v)144 588 R .692(ariable whose members are the line numbers i\ n source \214les where each corresponding)-.25 F .97(member of)144 600 R F2(FUNCN)3.47 E(AME)-.18 E F0 -.1(wa)3.22 G 3.47(si).1 G -1.9 -.4(nv o) -3.47 H -.1(ke).4 G(d.).1 E F1(${B)5.969 E(ASH_LINENO[)-.3 E/F4 10 /Times-Italic@0 SF($i)A F1(]})A F0 .969 (is the line number in the source)3.469 F 14.671(\214le \()144 612 R F1 (${B)A(ASH_SOURCE[)-.3 E F4($i+1)A F1(]})A F0 17.171(\)w)C(here)-17.171 E F1(${FUNCN)17.172 E(AME[)-.2 E F4($i)A F1(]})A F0 -.1(wa)17.172 G 17.172(sc).1 G 14.672(alled \(or)-17.172 F F1(${B)144 624 Q(ASH_LINENO[) -.3 E F4($i-1)A F1(]})A F0 .115 (if referenced within another shell function\).)2.615 F(Use)5.115 E F2 (LINENO)2.615 E F0 .115(to obtain the)2.365 F(current line number)144 636 Q(.)-.55 E F1 -.3(BA)108 648 S(SH_LO).3 E(AD)-.4 E(ABLES_P)-.35 E -.95(AT)-.74 G(H).95 E F0 4.07(Ac)144 660 S 1.57(olon-separated list of\ directories in which the shell looks for dynamically loadable b)-4.07 F (uiltins)-.2 E(speci\214ed by the)144 672 Q F1(enable)2.5 E F0(command.) 2.5 E F1 -.3(BA)108 684 S(SH_REMA).3 E(TCH)-.95 E F0 .006(An array v)144 696 R .006(ariable whose members are assigned by the)-.25 F F1(=~)2.506 E F0 .005(binary operator to the)2.506 F F1([[)2.505 E F0 .005 (conditional com-)2.505 F 2.506(mand. The)144 708 R .007 (element with inde)2.506 F 2.507(x0i)-.15 G 2.507(st)-2.507 G .007 (he portion of the string matching the entire re)-2.507 F .007(gular e) -.15 F(xpression.)-.15 E 4.331(The element with inde)144 720 R(x)-.15 E F4(n)6.831 E F0 4.331(is the portion of the string matching the)6.831 F F4(n)6.83 E F0 4.33(th parenthesized)B(GNU Bash 5.1)72 768 Q (2020 October 29)141.235 E(11)190.395 E 0 Cg EP %%Page: 12 12 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E(sube)144 84 Q (xpression.)-.15 E/F1 10/Times-Bold@0 SF -.3(BA)108 96 S(SH_SOURCE).3 E F0 .125(An array v)144 108 R .125(ariable whose members are the source \ \214lenames where the corresponding shell function)-.25 F .781 (names in the)144 120 R/F2 9/Times-Bold@0 SF(FUNCN)3.28 E(AME)-.18 E F0 .78(array v)3.03 F .78(ariable are de\214ned.)-.25 F .78 (The shell function)5.78 F F1(${FUNCN)3.28 E(AME[)-.2 E/F3 10 /Times-Italic@0 SF($i)A F1(]})A F0(is)3.28 E(de\214ned in the \214le)144 132 Q F1(${B)2.5 E(ASH_SOURCE[)-.3 E F3($i)A F1(]})A F0(and called from) 2.5 E F1(${B)2.5 E(ASH_SOURCE[)-.3 E F3($i+1)A F1(]})A F0(.)A F1 -.3(BA) 108 144 S(SH_SUBSHELL).3 E F0 .296 (Incremented by one within each subshell or subshell en)144 156 R .296 (vironment when the shell be)-.4 F .297(gins e)-.15 F -.15(xe)-.15 G (cuting).15 E 1.277(in that en)144 168 R 3.777(vironment. The)-.4 F 1.277(initial v)3.777 F 1.277(alue is 0.)-.25 F(If)6.277 E F1 -.3(BA) 3.777 G(SH_SUBSHELL).3 E F0 1.276(is unset, it loses its special)3.777 F (properties, e)144 180 Q -.15(ve)-.25 G 2.5(ni).15 G 2.5(fi)-2.5 G 2.5 (ti)-2.5 G 2.5(ss)-2.5 G(ubsequently reset.)-2.5 E F1 -.3(BA)108 192 S (SH_VERSINFO).3 E F0 2.644(Ar)144 204 S .144(eadonly array v)-2.644 F .144(ariable whose members hold v)-.25 F .144 (ersion information for this instance of)-.15 F F1(bash)2.645 E F0 5.145 (.T)C(he)-5.145 E -.25(va)144 216 S (lues assigned to the array members are as follo).25 E(ws:)-.25 E F1 -.3 (BA)144 234 S(SH_VERSINFO[).3 E F0(0)A F1(])A F0(The major v)264 234 Q (ersion number \(the)-.15 E F3 -.37(re)2.5 G(lease).37 E F0(\).)A F1 -.3 (BA)144 246 S(SH_VERSINFO[).3 E F0(1)A F1(])A F0(The minor v)264 246 Q (ersion number \(the)-.15 E F3(ver)2.5 E(sion)-.1 E F0(\).)A F1 -.3(BA) 144 258 S(SH_VERSINFO[).3 E F0(2)A F1(])A F0(The patch le)264 258 Q -.15 (ve)-.25 G(l.).15 E F1 -.3(BA)144 270 S(SH_VERSINFO[).3 E F0(3)A F1(])A F0(The b)264 270 Q(uild v)-.2 E(ersion.)-.15 E F1 -.3(BA)144 282 S (SH_VERSINFO[).3 E F0(4)A F1(])A F0(The release status \(e.g.,)264 282 Q F3(beta1)2.5 E F0(\).)A F1 -.3(BA)144 294 S(SH_VERSINFO[).3 E F0(5)A F1 (])A F0(The v)264 294 Q(alue of)-.25 E F2(MA)2.5 E(CHTYPE)-.495 E/F4 9 /Times-Roman@0 SF(.)A F1 -.3(BA)108 306 S(SH_VERSION).3 E F0 (Expands to a string describing the v)144 318 Q (ersion of this instance of)-.15 E F1(bash)2.5 E F0(.)A F1(COMP_CW)108 330 Q(ORD)-.1 E F0 .397(An inde)144 342 R 2.897(xi)-.15 G(nto)-2.897 E F1(${COMP_W)2.896 E(ORDS})-.1 E F0 .396(of the w)2.896 F .396 (ord containing the current cursor position.)-.1 F .396(This v)5.396 F (ari-)-.25 E 1.18(able is a)144 354 R -.25(va)-.2 G 1.181 (ilable only in shell functions in).25 F -.2(vo)-.4 G -.1(ke).2 G 3.681 (db).1 G 3.681(yt)-3.681 G 1.181(he programmable completion f)-3.681 F 1.181(acilities \(see)-.1 F F1(Pr)144 366 Q(ogrammable Completion)-.18 E F0(belo)2.5 E(w\).)-.25 E F1(COMP_KEY)108 378 Q F0(The k)144 390 Q .3 -.15(ey \()-.1 H(or \214nal k).15 E .3 -.15(ey o)-.1 H 2.5(fak).15 G .3 -.15(ey s)-2.6 H(equence\) used to in).15 E -.2(vo)-.4 G .2 -.1(ke t).2 H(he current completion function.).1 E F1(COMP_LINE)108 402 Q F0 1.208 (The current command line.)144 414 R 1.208(This v)6.208 F 1.208 (ariable is a)-.25 F -.25(va)-.2 G 1.208 (ilable only in shell functions and e).25 F 1.207(xternal com-)-.15 F 1.037(mands in)144 426 R -.2(vo)-.4 G -.1(ke).2 G 3.537(db).1 G 3.537 (yt)-3.537 G 1.037(he programmable completion f)-3.537 F 1.037 (acilities \(see)-.1 F F1(Pr)3.537 E 1.037(ogrammable Completion)-.18 F F0(be-)3.537 E(lo)144 438 Q(w\).)-.25 E F1(COMP_POINT)108 450 Q F0 .667 (The inde)144 462 R 3.167(xo)-.15 G 3.167(ft)-3.167 G .666 (he current cursor position relati)-3.167 F .966 -.15(ve t)-.25 H 3.166 (ot).15 G .666(he be)-3.166 F .666(ginning of the current command.)-.15 F .666(If the)5.666 F .534 (current cursor position is at the end of the current command, the v)144 474 R .535(alue of this v)-.25 F .535(ariable is equal to)-.25 F F1 (${#COMP_LINE})144 486 Q F0 5.705(.T)C .705(his v)-5.705 F .704 (ariable is a)-.25 F -.25(va)-.2 G .704 (ilable only in shell functions and e).25 F .704(xternal commands in-) -.15 F -.2(vo)144 498 S -.1(ke).2 G 2.5(db).1 G 2.5(yt)-2.5 G (he programmable completion f)-2.5 E(acilities \(see)-.1 E F1(Pr)2.5 E (ogrammable Completion)-.18 E F0(belo)2.5 E(w\).)-.25 E F1(COMP_TYPE)108 510 Q F0 .041(Set to an inte)144 522 R .041(ger v)-.15 F .041(alue corr\ esponding to the type of completion attempted that caused a completion) -.25 F .338(function to be called:)144 534 R F3 -.5(TA)2.837 G(B).5 E F0 2.837(,f)C .337(or normal completion,)-2.837 F F3(?)2.837 E F0 2.837(,f) C .337(or listing completions after successi)-2.837 F .637 -.15(ve t) -.25 H(abs,).15 E F3(!)144 546 Q F0 3.067(,f)C .567 (or listing alternati)-3.067 F -.15(ve)-.25 G 3.067(so).15 G 3.067(np) -3.067 G .567(artial w)-3.067 F .567(ord completion,)-.1 F F3(@)3.067 E F0 3.067(,t)C 3.067(ol)-3.067 G .567(ist completions if the w)-3.067 F .567(ord is not un-)-.1 F .418(modi\214ed, or)144 558 R F3(%)2.918 E F0 2.918(,f)C .418(or menu completion.)-2.918 F .417(This v)5.417 F .417 (ariable is a)-.25 F -.25(va)-.2 G .417 (ilable only in shell functions and e).25 F(xter)-.15 E(-)-.2 E .704 (nal commands in)144 570 R -.2(vo)-.4 G -.1(ke).2 G 3.204(db).1 G 3.204 (yt)-3.204 G .704(he programmable completion f)-3.204 F .704 (acilities \(see)-.1 F F1(Pr)3.204 E .704(ogrammable Comple-)-.18 F (tion)144 582 Q F0(belo)2.5 E(w\).)-.25 E F1(COMP_W)108 594 Q(ORDBREAKS) -.1 E F0 1.336(The set of characters that the)144 606 R F1 -.18(re)3.836 G(adline).18 E F0 1.336(library treats as w)3.836 F 1.335 (ord separators when performing w)-.1 F(ord)-.1 E 3.125(completion. If) 144 618 R F2(COMP_W)3.125 E(ORDBREAKS)-.09 E F0 .626 (is unset, it loses its special properties, e)2.875 F -.15(ve)-.25 G 3.126(ni).15 G 3.126(fi)-3.126 G 3.126(ti)-3.126 G 3.126(ss)-3.126 G (ubse-)-3.126 E(quently reset.)144 630 Q F1(COMP_W)108 642 Q(ORDS)-.1 E F0 .654(An array v)144 654 R .654(ariable \(see)-.25 F F1(Arrays)3.154 E F0(belo)3.154 E .654(w\) consisting of the indi)-.25 F .653(vidual w) -.25 F .653(ords in the current command)-.1 F 3.191(line. The)144 666 R .692(line is split into w)3.192 F .692(ords as)-.1 F F1 -.18(re)3.192 G (adline).18 E F0 -.1(wo)3.192 G .692(uld split it, using).1 F F2(COMP_W) 3.192 E(ORDBREAKS)-.09 E F0 .692(as de-)2.942 F 1.558(scribed abo)144 678 R -.15(ve)-.15 G 6.558(.T).15 G 1.558(his v)-6.558 F 1.558 (ariable is a)-.25 F -.25(va)-.2 G 1.558 (ilable only in shell functions in).25 F -.2(vo)-.4 G -.1(ke).2 G 4.057 (db).1 G 4.057(yt)-4.057 G 1.557(he programmable)-4.057 F(completion f) 144 690 Q(acilities \(see)-.1 E F1(Pr)2.5 E(ogrammable Completion)-.18 E F0(belo)2.5 E(w\).)-.25 E F1(COPR)108 702 Q(OC)-.3 E F0 .168(An array v) 144 714 R .168(ariable \(see)-.25 F F1(Arrays)2.668 E F0(belo)2.669 E .169 (w\) created to hold the \214le descriptors for output from and input) -.25 F(to an unnamed coprocess \(see)144 726 Q F1(Copr)2.5 E(ocesses) -.18 E F0(abo)2.5 E -.15(ve)-.15 G(\).).15 E(GNU Bash 5.1)72 768 Q (2020 October 29)141.235 E(12)190.395 E 0 Cg EP %%Page: 13 13 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10/Times-Bold@0 SF(DIRST)108 84 Q -.55(AC)-.9 G(K).55 E F0 .79(An array v)144 96 R .79 (ariable \(see)-.25 F F1(Arrays)3.29 E F0(belo)3.289 E .789 (w\) containing the current contents of the directory stack.)-.25 F(Di-) 5.789 E .099(rectories appear in the stack in the order the)144 108 R 2.599(ya)-.15 G .099(re displayed by the)-2.599 F F1(dirs)2.599 E F0 -.2 (bu)2.599 G 2.599(iltin. Assigning).2 F .099(to mem-)2.599 F .84 (bers of this array v)144 120 R .84 (ariable may be used to modify directories already in the stack, b)-.25 F .84(ut the)-.2 F F1(pushd)3.34 E F0(and)144 132 Q F1(popd)3.45 E F0 -.2(bu)3.45 G .951(iltins must be used to add and remo).2 F 1.251 -.15 (ve d)-.15 H 3.451(irectories. Assignment).15 F .951(to this v)3.451 F .951(ariable will)-.25 F .379(not change the current directory)144 144 R 5.379(.I)-.65 G(f)-5.379 E/F2 9/Times-Bold@0 SF(DIRST)2.879 E -.495(AC) -.81 G(K).495 E F0 .378(is unset, it loses its special properties, e) 2.629 F -.15(ve)-.25 G 2.878(ni).15 G 2.878(fi)-2.878 G 2.878(ti)-2.878 G(s)-2.878 E(subsequently reset.)144 156 Q F1(EPOCHREAL)108 168 Q(TIME) -.92 E F0 .337(Each time this parameter is referenced, it e)144 180 R .338(xpands to the number of seconds since the Unix Epoch)-.15 F(\(see) 144 192 Q/F3 10/Times-Italic@0 SF(time)2.917 E F0 .417 (\(3\)\) as a \215oating point v)B .416 (alue with micro-second granularity)-.25 F 5.416(.A)-.65 G .416 (ssignments to)-5.416 F F2(EPOCHRE-)2.916 E(AL)144 204 Q(TIME)-.828 E F0 1.09(are ignored.)3.34 F(If)6.09 E F2(EPOCHREAL)3.59 E(TIME)-.828 E F0 1.09(is unset, it loses its special properties, e)3.34 F -.15(ve)-.25 G 3.591(ni).15 G 3.591(fi)-3.591 G 3.591(ti)-3.591 G(s)-3.591 E (subsequently reset.)144 216 Q F1(EPOCHSECONDS)108 228 Q F0 .338 (Each time this parameter is referenced, it e)144 240 R .337 (xpands to the number of seconds since the Unix Epoch)-.15 F(\(see)144 252 Q F3(time)4.041 E F0 4.041(\(3\)\). Assignments)B(to)4.041 E F2 (EPOCHSECONDS)4.041 E F0 1.542(are ignored.)3.792 F(If)6.542 E F2 (EPOCHSECONDS)4.042 E F0 1.542(is unset, it)3.792 F (loses its special properties, e)144 264 Q -.15(ve)-.25 G 2.5(ni).15 G 2.5(fi)-2.5 G 2.5(ti)-2.5 G 2.5(ss)-2.5 G(ubsequently reset.)-2.5 E F1 (EUID)108 276 Q F0 1.104(Expands to the ef)144 276 R(fecti)-.25 E 1.403 -.15(ve u)-.25 H 1.103(ser ID of the current user).15 F 3.603(,i)-.4 G 1.103(nitialized at shell startup.)-3.603 F 1.103(This v)6.103 F 1.103 (ariable is)-.25 F(readonly)144 288 Q(.)-.65 E F1(FUNCN)108 300 Q(AME) -.2 E F0 .478(An array v)144 312 R .479 (ariable containing the names of all shell functions currently in the e) -.25 F -.15(xe)-.15 G .479(cution call stack.).15 F .277 (The element with inde)144 324 R 2.777(x0i)-.15 G 2.777(st)-2.777 G .276 (he name of an)-2.777 F 2.776(yc)-.15 G(urrently-e)-2.776 E -.15(xe)-.15 G .276(cuting shell function.).15 F .276(The bottom-most)5.276 F .384 (element \(the one with the highest inde)144 336 R .384(x\) is)-.15 F/F4 10/Courier@0 SF("main")2.884 E F0 5.384(.T)C .384(his v)-5.384 F .385 (ariable e)-.25 F .385(xists only when a shell func-)-.15 F .076 (tion is e)144 348 R -.15(xe)-.15 G 2.576(cuting. Assignments).15 F(to) 2.576 E F2(FUNCN)2.576 E(AME)-.18 E F0(ha)2.326 E .376 -.15(ve n)-.2 H 2.576(oe).15 G -.25(ff)-2.576 G 2.576(ect. If).25 F F2(FUNCN)2.575 E (AME)-.18 E F0 .075(is unset, it loses its)2.325 F (special properties, e)144 360 Q -.15(ve)-.25 G 2.5(ni).15 G 2.5(fi)-2.5 G 2.5(ti)-2.5 G 2.5(ss)-2.5 G(ubsequently reset.)-2.5 E .11(This v)144 378 R .111(ariable can be used with)-.25 F F1 -.3(BA)2.611 G(SH_LINENO) .3 E F0(and)2.611 E F1 -.3(BA)2.611 G(SH_SOURCE).3 E F0 5.111(.E)C .111 (ach element of)-5.111 F F1(FUNC-)2.611 E -.2(NA)144 390 S(ME).2 E F0 1.404(has corresponding elements in)3.904 F F1 -.3(BA)3.904 G(SH_LINENO) .3 E F0(and)3.904 E F1 -.3(BA)3.904 G(SH_SOURCE).3 E F0 1.404 (to describe the)3.904 F .012(call stack.)144 402 R -.15(Fo)5.012 G 2.512(ri).15 G(nstance,)-2.512 E F1(${FUNCN)2.512 E(AME[)-.2 E F3($i)A F1(]})A F0 -.1(wa)2.512 G 2.512(sc).1 G .012(alled from the \214le) -2.512 F F1(${B)2.512 E(ASH_SOURCE[)-.3 E F3($i+1)A F1(]})A F0 1.184 (at line number)144 414 R F1(${B)3.684 E(ASH_LINENO[)-.3 E F3($i)A F1 (]})A F0 6.184(.T)C(he)-6.184 E F1(caller)3.683 E F0 -.2(bu)3.683 G 1.183(iltin displays the current call stack using).2 F (this information.)144 426 Q F1(GR)108 438 Q(OUPS)-.3 E F0 1.228 (An array v)144 450 R 1.228(ariable containing the list of groups of wh\ ich the current user is a member)-.25 F 6.229(.A)-.55 G(ssign-)-6.229 E .572(ments to)144 462 R F2(GR)3.072 E(OUPS)-.27 E F0(ha)2.822 E .872 -.15(ve n)-.2 H 3.072(oe).15 G -.25(ff)-3.072 G 3.072(ect. If).25 F F2 (GR)3.072 E(OUPS)-.27 E F0 .572 (is unset, it loses its special properties, e)2.822 F -.15(ve)-.25 G 3.072(ni).15 G 3.071(fi)-3.072 G 3.071(ti)-3.071 G(s)-3.071 E (subsequently reset.)144 474 Q F1(HISTCMD)108 486 Q F0 2.81 (The history number)144 498 R 5.31(,o)-.4 G 5.31(ri)-5.31 G(nde)-5.31 E 5.311(xi)-.15 G 5.311(nt)-5.311 G 2.811 (he history list, of the current command.)-5.311 F 2.811(Assignments to) 7.811 F F2(HISTCMD)144 510 Q F0 1.135(are ignored.)3.385 F(If)6.135 E F2 (HISTCMD)3.635 E F0 1.135(is unset, it loses its special properties, e) 3.385 F -.15(ve)-.25 G 3.634(ni).15 G 3.634(fi)-3.634 G 3.634(ti)-3.634 G 3.634(ss)-3.634 G(ubse-)-3.634 E(quently reset.)144 522 Q F1(HOSTN)108 534 Q(AME)-.2 E F0(Automatically set to the name of the current host.) 144 546 Q F1(HOSTTYPE)108 558 Q F0 .222(Automatically set to a string t\ hat uniquely describes the type of machine on which)144 570 R F1(bash) 2.723 E F0 .223(is e)2.723 F -.15(xe)-.15 G(cut-).15 E 2.5(ing. The)144 582 R(def)2.5 E(ault is system-dependent.)-.1 E F1(LINENO)108 594 Q F0 1.408(Each time this parameter is referenced, the shell substitutes a d\ ecimal number representing the)144 606 R .078(current sequential line n\ umber \(starting with 1\) within a script or function.)144 618 R .079 (When not in a script or)5.078 F .307(function, the v)144 630 R .307 (alue substituted is not guaranteed to be meaningful.)-.25 F(If)5.306 E F2(LINENO)2.806 E F0 .306(is unset, it loses its)2.556 F (special properties, e)144 642 Q -.15(ve)-.25 G 2.5(ni).15 G 2.5(fi)-2.5 G 2.5(ti)-2.5 G 2.5(ss)-2.5 G(ubsequently reset.)-2.5 E F1(MA)108 654 Q (CHTYPE)-.55 E F0 .898(Automatically set to a string that fully describ\ es the system type on which)144 666 R F1(bash)3.398 E F0 .899(is e)3.398 F -.15(xe)-.15 G .899(cuting, in).15 F(the standard GNU)144 678 Q F3 (cpu-company-system)2.5 E F0 2.5(format. The)2.5 F(def)2.5 E (ault is system-dependent.)-.1 E F1(MAPFILE)108 690 Q F0 .294 (An array v)144 702 R .294(ariable \(see)-.25 F F1(Arrays)2.794 E F0 (belo)2.794 E .294(w\) created to hold the te)-.25 F .293 (xt read by the)-.15 F F1(map\214le)2.793 E F0 -.2(bu)2.793 G .293 (iltin when no).2 F -.25(va)144 714 S(riable name is supplied.).25 E (GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(13)190.395 E 0 Cg EP %%Page: 14 14 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10/Times-Bold@0 SF(OLDPWD)108 84 Q F0(The pre)144 96 Q(vious w)-.25 E (orking directory as set by the)-.1 E F1(cd)2.5 E F0(command.)2.5 E F1 (OPT)108 108 Q(ARG)-.9 E F0 1.626(The v)144 120 R 1.627 (alue of the last option ar)-.25 F 1.627(gument processed by the)-.18 F F1(getopts)4.127 E F0 -.2(bu)4.127 G 1.627(iltin command \(see).2 F/F2 9 /Times-Bold@0 SF(SHELL)4.127 E -.09(BU)144 132 S(IL).09 E(TIN COMMANDS) -.828 E F0(belo)2.25 E(w\).)-.25 E F1(OPTIND)108 144 Q F0 1.652 (The inde)144 156 R 4.152(xo)-.15 G 4.152(ft)-4.152 G 1.652(he ne)-4.152 F 1.652(xt ar)-.15 F 1.652(gument to be processed by the)-.18 F F1 (getopts)4.151 E F0 -.2(bu)4.151 G 1.651(iltin command \(see).2 F F2 (SHELL)4.151 E -.09(BU)144 168 S(IL).09 E(TIN COMMANDS)-.828 E F0(belo) 2.25 E(w\).)-.25 E F1(OSTYPE)108 180 Q F0 .329(Automatically set to a s\ tring that describes the operating system on which)144 192 R F1(bash) 2.83 E F0 .33(is e)2.83 F -.15(xe)-.15 G 2.83(cuting. The).15 F(def)144 204 Q(ault is system-dependent.)-.1 E F1(PIPEST)108 216 Q -.95(AT)-.9 G (US).95 E F0 .61(An array v)144 228 R .61(ariable \(see)-.25 F F1 (Arrays)3.11 E F0(belo)3.11 E .61(w\) containing a list of e)-.25 F .61 (xit status v)-.15 F .61(alues from the processes in)-.25 F (the most-recently-e)144 240 Q -.15(xe)-.15 G(cuted fore).15 E (ground pipeline \(which may contain only a single command\).)-.15 E F1 (PPID)108 252 Q F0(The process ID of the shell')144 252 Q 2.5(sp)-.55 G 2.5(arent. This)-2.5 F -.25(va)2.5 G(riable is readonly).25 E(.)-.65 E F1(PWD)108 264 Q F0(The current w)144 264 Q (orking directory as set by the)-.1 E F1(cd)2.5 E F0(command.)2.5 E F1 (RANDOM)108 276 Q F0 .417(Each time this parameter is referenced, it e) 144 288 R .417(xpands to a random inte)-.15 F .417 (ger between 0 and 32767.)-.15 F(As-)5.417 E .551(signing a v)144 300 R .551(alue to)-.25 F F2(RANDOM)3.051 E F0 .551 (initializes \(seeds\) the sequence of random numbers.)2.801 F(If)5.55 E F2(RANDOM)3.05 E F0(is)2.8 E(unset, it loses its special properties, e) 144 312 Q -.15(ve)-.25 G 2.5(ni).15 G 2.5(fi)-2.5 G 2.5(ti)-2.5 G 2.5 (ss)-2.5 G(ubsequently reset.)-2.5 E F1(READLINE_LINE)108 324 Q F0 1.546 (The contents of the)144 336 R F1 -.18(re)4.047 G(adline).18 E F0 1.547 (line b)4.047 F(uf)-.2 E(fer)-.25 E 4.047(,f)-.4 G 1.547(or use with) -4.047 F/F3 10/Courier@0 SF 1.547(bind -x)4.047 F F0(\(see)4.047 E F2 1.547(SHELL B)4.047 F(UIL)-.09 E 1.547(TIN COM-)-.828 F(MANDS)144 348 Q F0(belo)2.25 E(w\).)-.25 E F1(READLINE_MARK)108 360 Q F0 .107 (The position of the mark \(sa)144 372 R -.15(ve)-.2 G 2.607(di).15 G .107(nsertion point\) in the)-2.607 F F1 -.18(re)2.606 G(adline).18 E F0 .106(line b)2.606 F(uf)-.2 E(fer)-.25 E 2.606(,f)-.4 G .106(or use with) -2.606 F F3 .106(bind -x)2.606 F F0(\(see)144 384 Q F2 1.016(SHELL B) 3.516 F(UIL)-.09 E 1.016(TIN COMMANDS)-.828 F F0(belo)3.266 E 3.516 (w\). The)-.25 F 1.017(characters between the insertion point and the) 3.516 F(mark are often called the)144 396 Q/F4 10/Times-Italic@0 SF -.37 (re)2.5 G(gion)-.03 E F0(.)A F1(READLINE_POINT)108 408 Q F0 .314 (The position of the insertion point in the)144 420 R F1 -.18(re)2.813 G (adline).18 E F0 .313(line b)2.813 F(uf)-.2 E(fer)-.25 E 2.813(,f)-.4 G .313(or use with)-2.813 F F3 .313(bind -x)2.813 F F0(\(see)2.813 E F2 (SHELL)2.813 E -.09(BU)144 432 S(IL).09 E(TIN COMMANDS)-.828 E F0(belo) 2.25 E(w\).)-.25 E F1(REPL)108 444 Q(Y)-.92 E F0 (Set to the line of input read by the)144 456 Q F1 -.18(re)2.5 G(ad).18 E F0 -.2(bu)2.5 G(iltin command when no ar).2 E(guments are supplied.) -.18 E F1(SECONDS)108 468 Q F0 .795(Each time this parameter is referen\ ced, the number of seconds since shell in)144 480 R -.2(vo)-.4 G .795 (cation is returned.).2 F .713(If a v)144 492 R .712 (alue is assigned to)-.25 F F2(SECONDS)3.212 E/F5 9/Times-Roman@0 SF(,)A F0 .712(the v)2.962 F .712 (alue returned upon subsequent references is the number)-.25 F .627 (of seconds since the assignment plus the v)144 504 R .627 (alue assigned.)-.25 F .628(The number of seconds at shell in)5.627 F -.2(vo)-.4 G(ca-).2 E .458(tion and the current time is al)144 516 R -.1 (wa)-.1 G .458(ys determined by querying the system clock.).1 F(If)5.457 E F2(SECONDS)2.957 E F0 .457(is un-)2.707 F (set, it loses its special properties, e)144 528 Q -.15(ve)-.25 G 2.5 (ni).15 G 2.5(fi)-2.5 G 2.5(ti)-2.5 G 2.5(ss)-2.5 G(ubsequently reset.) -2.5 E F1(SHELLOPTS)108 540 Q F0 3.262(Ac)144 552 S .763 (olon-separated list of enabled shell options.)-3.262 F .763(Each w) 5.763 F .763(ord in the list is a v)-.1 F .763(alid ar)-.25 F .763 (gument for the)-.18 F F1144 564 Q F0 1.174(option to the)3.674 F F1(set)3.674 E F0 -.2(bu)3.674 G 1.174(iltin command \(see).2 F F2 1.173 (SHELL B)3.673 F(UIL)-.09 E 1.173(TIN COMMANDS)-.828 F F0(belo)3.423 E 3.673(w\). The)-.25 F(options)3.673 E .019(appearing in)144 576 R F2 (SHELLOPTS)2.519 E F0 .019(are those reported as)2.269 F F4(on)2.749 E F0(by)2.759 E F1 .019(set \255o)2.519 F F0 5.019(.I)C 2.519(ft)-5.019 G .019(his v)-2.519 F .02(ariable is in the en)-.25 F(vironment)-.4 E (when)144 588 Q F1(bash)3.142 E F0 .642(starts up, each shell option in\ the list will be enabled before reading an)3.142 F 3.141(ys)-.15 G .641 (tartup \214les.)-3.141 F(This v)144 600 Q(ariable is read-only)-.25 E (.)-.65 E F1(SHL)108 612 Q(VL)-.92 E F0 (Incremented by one each time an instance of)144 624 Q F1(bash)2.5 E F0 (is started.)2.5 E F1(SRANDOM)108 636 Q F0 .76(This v)144 648 R .76 (ariable e)-.25 F .761(xpands to a 32-bit pseudo-random number each tim\ e it is referenced. The random)-.15 F .565 (number generator is not linear on systems that support)144 660 R F3 (/dev/urandom)3.064 E F0(or)3.064 E F4(ar)3.064 E(c4r)-.37 E(andom)-.15 E F0 3.064(,s)C 3.064(oe)-3.064 G(ach)-3.064 E .788 (returned number has no relationship to the numbers preceding it.)144 672 R .788(The random number generator)5.788 F .088 (cannot be seeded, so assignments to this v)144 684 R .087(ariable ha) -.25 F .387 -.15(ve n)-.2 H 2.587(oe).15 G -.25(ff)-2.587 G 2.587 (ect. If).25 F F2(SRANDOM)2.587 E F0 .087(is unset, it loses its)2.337 F (special properties, e)144 696 Q -.15(ve)-.25 G 2.5(ni).15 G 2.5(fi)-2.5 G 2.5(ti)-2.5 G 2.5(ss)-2.5 G(ubsequently reset.)-2.5 E F1(UID)108 708 Q F0(Expands to the user ID of the current user)144 708 Q 2.5(,i)-.4 G (nitialized at shell startup.)-2.5 E(This v)5 E(ariable is readonly)-.25 E(.)-.65 E .993(The follo)108 724.8 R .993(wing v)-.25 F .994 (ariables are used by the shell.)-.25 F .994(In some cases,)5.994 F F1 (bash)3.494 E F0 .994(assigns a def)3.494 F .994(ault v)-.1 F .994 (alue to a v)-.25 F(ariable;)-.25 E(GNU Bash 5.1)72 768 Q (2020 October 29)141.235 E(14)190.395 E 0 Cg EP %%Page: 15 15 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E (these cases are noted belo)108 84 Q -.65(w.)-.25 G/F1 10/Times-Bold@0 SF -.3(BA)108 100.8 S(SH_COMP).3 E -.95(AT)-.74 G F0 .503(The v)144 112.8 R .502(alue is used to set the shell')-.25 F 3.002(sc)-.55 G .502 (ompatibility le)-3.002 F -.15(ve)-.25 G 3.002(l. See).15 F/F2 9 /Times-Bold@0 SF .502(SHELL COMP)3.002 F -.855(AT)-.666 G .502 (IBILITY MODE).855 F F0(be-)2.752 E(lo)144 124.8 Q 2.662(wf)-.25 G .162 (or a description of the v)-2.662 F .162(arious compatibility le)-.25 F -.15(ve)-.25 G .162(ls and their ef).15 F 2.663(fects. The)-.25 F -.25 (va)2.663 G .163(lue may be a dec-).25 F .33 (imal number \(e.g., 4.2\) or an inte)144 136.8 R .33 (ger \(e.g., 42\) corresponding to the desired compatibility le)-.15 F -.15(ve)-.25 G 2.83(l. If).15 F F1 -.3(BA)144 148.8 S(SH_COMP).3 E -.95 (AT)-.74 G F0 .86 (is unset or set to the empty string, the compatibility le)4.31 F -.15 (ve)-.25 G 3.361(li).15 G 3.361(ss)-3.361 G .861(et to the def)-3.361 F (ault)-.1 E .39(for the current v)144 160.8 R 2.89(ersion. If)-.15 F F1 -.3(BA)2.89 G(SH_COMP).3 E -.95(AT)-.74 G F0 .39(is set to a v)3.84 F .39(alue that is not one of the v)-.25 F .39(alid compati-)-.25 F .277 (bility le)144 172.8 R -.15(ve)-.25 G .278 (ls, the shell prints an error message and sets the compatibility le).15 F -.15(ve)-.25 G 2.778(lt).15 G 2.778(ot)-2.778 G .278(he def)-2.778 F .278(ault for the)-.1 F 1.401(current v)144 184.8 R 3.901(ersion. The) -.15 F -.25(va)3.901 G 1.401(lid v).25 F 1.401 (alues correspond to the compatibility le)-.25 F -.15(ve)-.25 G 1.401 (ls described belo).15 F 3.9(wu)-.25 G(nder)-3.9 E F2(BSHELL)144 196.8 Q /F3 9/Times-Roman@0 SF(COMP)A -.999(AT)-.828 G(IBILITY).999 E F2(MODE)A F3(.)A F0 -.15(Fo)4.997 G 2.997(re).15 G .497(xample, 4.2 and 42 are v) -3.147 F .497(alid v)-.25 F .498(alues that correspond to the)-.25 F F1 .774(compat42 shopt)144 208.8 R F0 .774 (option and set the compatibility le)3.274 F -.15(ve)-.25 G 3.274(lt).15 G 3.274(o4)-3.274 G 3.274(2. The)-3.274 F .774(current v)3.274 F .773 (ersion is also a v)-.15 F(alid)-.25 E -.25(va)144 220.8 S(lue.).25 E F1 -.3(BA)108 232.8 S(SH_ENV).3 E F0 .505(If this parameter is set when)144 244.8 R F1(bash)3.005 E F0 .505(is e)3.005 F -.15(xe)-.15 G .506 (cuting a shell script, its v).15 F .506 (alue is interpreted as a \214lename)-.25 F .391 (containing commands to initialize the shell, as in)144 256.8 R/F4 10 /Times-Italic@0 SF(~/.bashr)2.39 E(c)-.37 E F0 5.39(.T).31 G .39(he v) -5.39 F .39(alue of)-.25 F F2 -.27(BA)2.89 G(SH_ENV).27 E F0 .39 (is subjected)2.64 F .525(to parameter e)144 268.8 R .525 (xpansion, command substitution, and arithmetic e)-.15 F .525 (xpansion before being interpreted)-.15 F(as a \214lename.)144 280.8 Q F2 -.666(PA)5 G(TH)-.189 E F0 (is not used to search for the resultant \214lename.)2.25 E F1 -.3(BA) 108 292.8 S(SH_XTRA).3 E(CEFD)-.55 E F0 .481(If set to an inte)144 304.8 R .481(ger corresponding to a v)-.15 F .481(alid \214le descriptor)-.25 F(,)-.4 E F1(bash)2.98 E F0 .48(will write the trace output gener)2.98 F (-)-.2 E 3.114(ated when)144 316.8 R/F5 10/Courier@0 SF 3.114(set -x) 5.614 F F0 3.114(is enabled to that \214le descriptor)5.614 F 8.114(.T) -.55 G 3.114(he \214le descriptor is closed when)-8.114 F F2 -.27(BA)144 328.8 S(SH_XTRA).27 E(CEFD)-.495 E F0 .138(is unset or assigned a ne) 2.388 F 2.638(wv)-.25 G 2.638(alue. Unsetting)-2.888 F F2 -.27(BA)2.638 G(SH_XTRA).27 E(CEFD)-.495 E F0 .138(or assigning it)2.388 F 2.531(the \ empty string causes the trace output to be sent to the standard error) 144 340.8 R 7.531(.N)-.55 G 2.531(ote that setting)-7.531 F F2 -.27(BA) 144 352.8 S(SH_XTRA).27 E(CEFD)-.495 E F0 .74(to 2 \(the standard error\ \214le descriptor\) and then unsetting it will result in the)2.991 F (standard error being closed.)144 364.8 Q F1(CDP)108 376.8 Q -.95(AT) -.74 G(H).95 E F0 1.247(The search path for the)144 388.8 R F1(cd)3.747 E F0 3.747(command. This)3.747 F 1.248 (is a colon-separated list of directories in which the)3.747 F 3.796 (shell looks for destination directories speci\214ed by the)144 400.8 R F1(cd)6.295 E F0 6.295(command. A)6.295 F 3.795(sample v)6.295 F 3.795 (alue is)-.25 F F5(".:~:/usr")144 412.8 Q F0(.)A F1(CHILD_MAX)108 424.8 Q F0 .997(Set the number of e)144 436.8 R .997(xited child status v)-.15 F .997(alues for the shell to remember)-.25 F 5.997(.B)-.55 G .997 (ash will not allo)-5.997 F 3.498(wt)-.25 G(his)-3.498 E -.25(va)144 448.8 S 1.078(lue to be decreased belo).25 F 3.577(waP)-.25 G 1.077 (OSIX-mandated minimum, and there is a maximum v)-3.577 F 1.077 (alue \(cur)-.25 F(-)-.2 E(rently 8192\) that this may not e)144 460.8 Q 2.5(xceed. The)-.15 F(minimum v)2.5 E(alue is system-dependent.)-.25 E F1(COLUMNS)108 472.8 Q F0 .828(Used by the)144 484.8 R F1(select)3.328 E F0 .829(compound command to determine the terminal width when printing \ selection)3.328 F 3.466(lists. Automatically)144 496.8 R .966 (set if the)3.466 F F1(checkwinsize)3.466 E F0 .966 (option is enabled or in an interacti)3.466 F 1.266 -.15(ve s)-.25 H .966(hell upon re-).15 F(ceipt of a)144 508.8 Q F2(SIGWINCH)2.5 E F3(.)A F1(COMPREPL)108 520.8 Q(Y)-.92 E F0 .847(An array v)144 532.8 R .848 (ariable from which)-.25 F F1(bash)3.348 E F0 .848 (reads the possible completions generated by a shell function)3.348 F (in)144 544.8 Q -.2(vo)-.4 G -.1(ke).2 G 2.785(db).1 G 2.785(yt)-2.785 G .285(he programmable completion f)-2.785 F .285(acility \(see)-.1 F F1 (Pr)2.785 E .285(ogrammable Completion)-.18 F F0(belo)2.785 E 2.785 (w\). Each)-.25 F(array element contains one possible completion.)144 556.8 Q F1(EMA)108 568.8 Q(CS)-.55 E F0(If)144 580.8 Q F1(bash)2.535 E F0 .035(\214nds this v)2.535 F .035(ariable in the en)-.25 F .036 (vironment when the shell starts with v)-.4 F(alue)-.25 E F5(t)2.536 E F0 2.536(,i)C 2.536(ta)-2.536 G .036(ssumes that the)-2.536 F (shell is running in an Emacs shell b)144 592.8 Q(uf)-.2 E (fer and disables line editing.)-.25 E F1(ENV)108 604.8 Q F0 .671 (Expanded and e)144 604.8 R -.15(xe)-.15 G .671(cuted similarly to).15 F F2 -.27(BA)3.17 G(SH_ENV).27 E F0(\(see)2.92 E F1(INV)3.17 E(OCA)-.45 E (TION)-.95 E F0(abo)3.17 E -.15(ve)-.15 G 3.17(\)w).15 G .67 (hen an interacti)-3.17 F -.15(ve)-.25 G(shell is in)144 616.8 Q -.2(vo) -.4 G -.1(ke).2 G 2.5(di).1 G(n)-2.5 E F4(posix mode)2.5 E F0(.)A F1 (EXECIGNORE)108 628.8 Q F0 2.716(Ac)144 640.8 S .216 (olon-separated list of shell patterns \(see)-2.716 F F1 -.1(Pa)2.717 G (tter).1 E 2.717(nM)-.15 G(atching)-2.717 E F0 2.717(\)d)C .217 (e\214ning the list of \214lenames to be)-2.717 F .117 (ignored by command search using)144 652.8 R F1 -.74(PA)2.617 G(TH)-.21 E F0 5.117(.F)C .116 (iles whose full pathnames match one of these patterns)-5.117 F 1.432 (are not considered e)144 664.8 R -.15(xe)-.15 G 1.432 (cutable \214les for the purposes of completion and command e).15 F -.15 (xe)-.15 G 1.433(cution via).15 F F1 -.74(PA)144 676.8 S(TH)-.21 E F0 2.909(lookup. This)2.909 F .408(does not af)2.908 F .408(fect the beha) -.25 F .408(vior of the)-.2 F F1([)2.908 E F0(,)A F1(test)2.908 E F0 2.908(,a)C(nd)-2.908 E F1([[)2.908 E F0 2.908(commands. Full)2.908 F (pathnames)2.908 E .364(in the command hash table are not subject to)144 688.8 R F1(EXECIGNORE)2.864 E F0 5.364(.U)C .364(se this v)-5.364 F .364 (ariable to ignore shared)-.25 F 1.37(library \214les that ha)144 700.8 R 1.67 -.15(ve t)-.2 H 1.37(he e).15 F -.15(xe)-.15 G 1.37 (cutable bit set, b).15 F 1.37(ut are not e)-.2 F -.15(xe)-.15 G 1.37 (cutable \214les.).15 F 1.37(The pattern matching)6.37 F (honors the setting of the)144 712.8 Q F1(extglob)2.5 E F0 (shell option.)2.5 E(GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(15) 190.395 E 0 Cg EP %%Page: 16 16 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10/Times-Bold@0 SF(FCEDIT)108 84 Q F0(The def)144 96 Q(ault editor for the)-.1 E F1(fc) 2.5 E F0 -.2(bu)2.5 G(iltin command.).2 E F1(FIGNORE)108 108 Q F0 2.598 (Ac)144 120 S .098(olon-separated list of suf)-2.598 F<8c78>-.25 E .098 (es to ignore when performing \214lename completion \(see)-.15 F/F2 9 /Times-Bold@0 SF(READLINE)2.599 E F0(belo)144 132 Q 2.705(w\). A)-.25 F .205(\214lename whose suf)2.705 F .205 (\214x matches one of the entries in)-.25 F F2(FIGNORE)2.705 E F0 .205 (is e)2.455 F .204(xcluded from the list)-.15 F(of matched \214lenames.) 144 144 Q 2.5(As)5 G(ample v)-2.5 E(alue is)-.25 E/F3 10/Courier@0 SF (".o:~")2.5 E F0(.)A F1(FUNCNEST)108 156 Q F0 .23(If set to a numeric v) 144 168 R .231 (alue greater than 0, de\214nes a maximum function nesting le)-.25 F -.15(ve)-.25 G 2.731(l. Function).15 F(in)2.731 E -.2(vo)-.4 G(-).2 E (cations that e)144 180 Q(xceed this nesting le)-.15 E -.15(ve)-.25 G 2.5(lw).15 G(ill cause the current command to abort.)-2.5 E F1 (GLOBIGNORE)108 192 Q F0 2.924(Ac)144 204 S .423(olon-separated list of\ patterns de\214ning the set of \214le names to be ignored by pathname \ e)-2.924 F(xpan-)-.15 E 2.947(sion. If)144 216 R 2.947<618c>2.947 G .447 (le name matched by a pathname e)-2.947 F .448 (xpansion pattern also matches one of the patterns in)-.15 F F2 (GLOBIGNORE)144 228 Q/F4 9/Times-Roman@0 SF(,)A F0(it is remo)2.25 E -.15(ve)-.15 G 2.5(df).15 G(rom the list of matches.)-2.5 E F1 (HISTCONTR)108 240 Q(OL)-.3 E F0 2.654(Ac)144 252 S .153 (olon-separated list of v)-2.654 F .153(alues controlling ho)-.25 F 2.653(wc)-.25 G .153(ommands are sa)-2.653 F -.15(ve)-.2 G 2.653(do).15 G 2.653(nt)-2.653 G .153(he history list.)-2.653 F .153(If the list) 5.153 F .49(of v)144 264 R .49(alues includes)-.25 F/F5 10 /Times-Italic@0 SF(ignor)3 E(espace)-.37 E F0 2.99(,l).18 G .49 (ines which be)-2.99 F .49(gin with a)-.15 F F1(space)2.99 E F0 .49 (character are not sa)2.99 F -.15(ve)-.2 G 2.99(di).15 G 2.99(nt)-2.99 G .49(he his-)-2.99 F .558(tory list.)144 276 R 3.058(Av)5.558 G .558 (alue of)-3.308 F F5(ignor)3.068 E(edups)-.37 E F0 .558 (causes lines matching the pre)3.328 F .557 (vious history entry to not be sa)-.25 F -.15(ve)-.2 G(d.).15 E 2.925 (Av)144 288 S .425(alue of)-3.175 F F5(ignor)2.935 E(eboth)-.37 E F0 .426(is shorthand for)3.205 F F5(ignor)2.926 E(espace)-.37 E F0(and) 2.926 E F5(ignor)2.926 E(edups)-.37 E F0 5.426(.A)C -.25(va)-2.5 G .426 (lue of).25 F F5(er)3.116 E(asedups)-.15 E F0(causes)3.196 E .699 (all pre)144 300 R .698 (vious lines matching the current line to be remo)-.25 F -.15(ve)-.15 G 3.198(df).15 G .698(rom the history list before that line is)-3.198 F (sa)144 312 Q -.15(ve)-.2 G 2.763(d. An).15 F 2.763(yv)-.15 G .263 (alue not in the abo)-3.013 F .563 -.15(ve l)-.15 H .263 (ist is ignored.).15 F(If)5.263 E F2(HISTCONTR)2.763 E(OL)-.27 E F0 .264 (is unset, or does not include)2.513 F 2.942(av)144 324 S .442(alid v) -3.192 F .442(alue, all lines read by the shell parser are sa)-.25 F -.15(ve)-.2 G 2.941(do).15 G 2.941(nt)-2.941 G .441 (he history list, subject to the v)-2.941 F .441(alue of)-.25 F F2 (HISTIGNORE)144 336 Q F4(.)A F0 1.981(The second and subsequent lines o\ f a multi-line compound command are not)6.481 F (tested, and are added to the history re)144 348 Q -.05(ga)-.15 G (rdless of the v).05 E(alue of)-.25 E F2(HISTCONTR)2.5 E(OL)-.27 E F4(.) A F1(HISTFILE)108 360 Q F0 .181 (The name of the \214le in which command history is sa)144 372 R -.15 (ve)-.2 G 2.681(d\().15 G(see)-2.681 E F2(HIST)2.681 E(OR)-.162 E(Y) -.315 E F0(belo)2.431 E 2.681(w\). The)-.25 F(def)2.681 E .181(ault v) -.1 F(alue)-.25 E(is)144 384 Q F5(~/.bash_history)2.5 E F0 5(.I)C 2.5 (fu)-5 G(nset, the command history is not sa)-2.5 E -.15(ve)-.2 G 2.5 (dw).15 G(hen a shell e)-2.5 E(xits.)-.15 E F1(HISTFILESIZE)108 396 Q F0 1.622(The maximum number of lines contained in the history \214le.)144 408 R 1.623(When this v)6.623 F 1.623(ariable is assigned a)-.25 F -.25 (va)144 420 S .125(lue, the history \214le is truncated, if necessary) .25 F 2.625(,t)-.65 G 2.624(oc)-2.625 G .124 (ontain no more than that number of lines by re-)-2.624 F(mo)144 432 Q .065(ving the oldest entries.)-.15 F .066(The history \214le is also tr\ uncated to this size after writing it when a shell)5.065 F -.15(ex)144 444 S 2.928(its. If).15 F .428(the v)2.928 F .428 (alue is 0, the history \214le is truncated to zero size.)-.25 F .427 (Non-numeric v)5.427 F .427(alues and numeric)-.25 F -.25(va)144 456 S .152(lues less than zero inhibit truncation.).25 F .152 (The shell sets the def)5.152 F .152(ault v)-.1 F .152(alue to the v) -.25 F .152(alue of)-.25 F F1(HISTSIZE)2.652 E F0(after reading an)144 468 Q 2.5(ys)-.15 G(tartup \214les.)-2.5 E F1(HISTIGNORE)108 480 Q F0 2.658(Ac)144 492 S .158(olon-separated list of patterns used to decide \ which command lines should be sa)-2.658 F -.15(ve)-.2 G 2.657(do).15 G 2.657(nt)-2.657 G .157(he his-)-2.657 F .707(tory list.)144 504 R .707 (Each pattern is anchored at the be)5.707 F .708 (ginning of the line and must match the complete line)-.15 F .626 (\(no implicit `)144 516 R F1(*)A F0 3.126('i)C 3.126(sa)-3.126 G 3.126 (ppended\). Each)-3.126 F .626(pattern is tested ag)3.126 F .625 (ainst the line after the checks speci\214ed by)-.05 F F2(HISTCONTR)144 528 Q(OL)-.27 E F0 1.793(are applied.)4.043 F 1.793 (In addition to the normal shell pattern matching characters, `)6.793 F F1(&)A F0(')A 1.44(matches the pre)144 540 R 1.44(vious history line.) -.25 F(`)6.44 E F1(&)A F0 3.94('m)C 1.44 (ay be escaped using a backslash; the backslash is re-)-3.94 F(mo)144 552 Q -.15(ve)-.15 G 3.95(db).15 G 1.45(efore attempting a match.)-3.95 F 1.45(The second and subsequent lines of a multi-line compound)6.45 F 1.269(command are not tested, and are added to the history re)144 564 R -.05(ga)-.15 G 1.269(rdless of the v).05 F 1.269(alue of)-.25 F F2 (HISTIGNORE)3.769 E F4(.)A F0 (The pattern matching honors the setting of the)144 576 Q F1(extglob)2.5 E F0(shell option.)2.5 E F1(HISTSIZE)108 588 Q F0 1.387 (The number of commands to remember in the command history \(see)144 600 R F2(HIST)3.887 E(OR)-.162 E(Y)-.315 E F0(belo)3.637 E 3.887(w\). If) -.25 F(the)3.888 E -.25(va)144 612 S .413(lue is 0, commands are not sa) .25 F -.15(ve)-.2 G 2.913(di).15 G 2.913(nt)-2.913 G .413 (he history list.)-2.913 F .413(Numeric v)5.413 F .412 (alues less than zero result in e)-.25 F(v-)-.25 E .343 (ery command being sa)144 624 R -.15(ve)-.2 G 2.843(do).15 G 2.843(nt) -2.843 G .343(he history list \(there is no limit\).)-2.843 F .344 (The shell sets the def)5.343 F .344(ault v)-.1 F .344(alue to)-.25 F (500 after reading an)144 636 Q 2.5(ys)-.15 G(tartup \214les.)-2.5 E F1 (HISTTIMEFORMA)108 648 Q(T)-.95 E F0 .952(If this v)144 660 R .952 (ariable is set and not null, its v)-.25 F .951 (alue is used as a format string for)-.25 F F5(strftime)3.451 E F0 .951 (\(3\) to print the)B .672 (time stamp associated with each history entry displayed by the)144 672 R F1(history)3.173 E F0 -.2(bu)3.173 G 3.173(iltin. If).2 F .673(this v) 3.173 F .673(ariable is)-.25 F .144 (set, time stamps are written to the history \214le so the)144 684 R 2.644(ym)-.15 G .144(ay be preserv)-2.644 F .144 (ed across shell sessions.)-.15 F(This)5.144 E(uses the history comment\ character to distinguish timestamps from other history lines.)144 696 Q (GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(16)190.395 E 0 Cg EP %%Page: 17 17 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10/Times-Bold@0 SF(HOME)108 84 Q F0 1.27 (The home directory of the current user; the def)144 96 R 1.27(ault ar) -.1 F 1.27(gument for the)-.18 F F1(cd)3.77 E F0 -.2(bu)3.77 G 1.27 (iltin command.).2 F(The)6.27 E -.25(va)144 108 S(lue of this v).25 E (ariable is also used when performing tilde e)-.25 E(xpansion.)-.15 E F1 (HOSTFILE)108 120 Q F0 1.015 (Contains the name of a \214le in the same format as)144 132 R/F2 10 /Times-Italic@0 SF(/etc/hosts)5.181 E F0 1.015 (that should be read when the shell)5.181 F .55 (needs to complete a hostname.)144 144 R .551 (The list of possible hostname completions may be changed while)5.551 F 1.059(the shell is running; the ne)144 156 R 1.059 (xt time hostname completion is attempted after the v)-.15 F 1.058 (alue is changed,)-.25 F F1(bash)144 168 Q F0 .138 (adds the contents of the ne)2.638 F 2.638<778c>-.25 G .138(le to the e) -2.638 F .138(xisting list.)-.15 F(If)5.138 E/F3 9/Times-Bold@0 SF (HOSTFILE)2.638 E F0 .138(is set, b)2.388 F .139(ut has no v)-.2 F .139 (alue, or)-.25 F .518(does not name a readable \214le,)144 180 R F1 (bash)3.018 E F0 .518(attempts to read)3.018 F F2(/etc/hosts)4.683 E F0 .517(to obtain the list of possible host-)4.683 F(name completions.)144 192 Q(When)5 E F3(HOSTFILE)2.5 E F0 (is unset, the hostname list is cleared.)2.25 E F1(IFS)108 204 Q F0(The) 144 204 Q F2 .555(Internal F)3.635 F .555(ield Separ)-.45 F(ator)-.15 E F0 .555(that is used for w)3.785 F .556(ord splitting after e)-.1 F .556 (xpansion and to split lines into)-.15 F -.1(wo)144 216 S(rds with the) .1 E F1 -.18(re)2.5 G(ad).18 E F0 -.2(bu)2.5 G(iltin command.).2 E (The def)5 E(ault v)-.1 E(alue is `)-.25 E(`')-.25 E('.)-.74 E F1(IGNOREEOF)108 228 Q F0 .503 (Controls the action of an interacti)144 240 R .803 -.15(ve s)-.25 H .503(hell on receipt of an).15 F F3(EOF)3.003 E F0 .503 (character as the sole input.)2.753 F .503(If set,)5.503 F .426(the v) 144 252 R .426(alue is the number of consecuti)-.25 F -.15(ve)-.25 G F3 (EOF)3.076 E F0 .426 (characters which must be typed as the \214rst characters)2.676 F .303 (on an input line before)144 264 R F1(bash)2.802 E F0 -.15(ex)2.802 G 2.802(its. If).15 F .302(the v)2.802 F .302(ariable e)-.25 F .302 (xists b)-.15 F .302(ut does not ha)-.2 F .602 -.15(ve a n)-.2 H .302 (umeric v).15 F .302(alue, or has)-.25 F(no v)144 276 Q(alue, the def) -.25 E(ault v)-.1 E(alue is 10.)-.25 E(If it does not e)5 E(xist,)-.15 E F3(EOF)2.5 E F0(signi\214es the end of input to the shell.)2.25 E F1 (INPUTRC)108 288 Q F0 .26(The \214lename for the)144 300 R F1 -.18(re) 2.76 G(adline).18 E F0 .26(startup \214le, o)2.76 F -.15(ve)-.15 G .26 (rriding the def).15 F .261(ault of)-.1 F F2(~/.inputr)4.427 E(c)-.37 E F0(\(see)4.427 E F3(READLINE)2.761 E F0(be-)2.511 E(lo)144 312 Q(w\).) -.25 E F1(INSIDE_EMA)108 324 Q(CS)-.55 E F0 .034(If this v)144 336 R .034(ariable appears in the en)-.25 F .034 (vironment when the shell starts,)-.4 F F1(bash)2.533 E F0 .033 (assumes that it is running in-)2.533 F(side an Emacs shell b)144 348 Q (uf)-.2 E(fer and may disable line editing, depending on the v)-.25 E (alue of)-.25 E F1(TERM)2.5 E F0(.)A F1(LANG)108 360 Q F0 1.239 (Used to determine the locale cate)144 360 R 1.239(gory for an)-.15 F 3.739(yc)-.15 G(ate)-3.739 E 1.24 (gory not speci\214cally selected with a v)-.15 F(ariable)-.25 E (starting with)144 372 Q F1(LC_)2.5 E F0(.)A F1(LC_ALL)108 384 Q F0 .974 (This v)144 396 R .974(ariable o)-.25 F -.15(ve)-.15 G .974 (rrides the v).15 F .973(alue of)-.25 F F3(LANG)3.473 E F0 .973(and an) 3.223 F 3.473(yo)-.15 G(ther)-3.473 E F1(LC_)3.473 E F0 -.25(va)3.473 G .973(riable specifying a locale cate-).25 F(gory)144 408 Q(.)-.65 E F1 (LC_COLLA)108 420 Q(TE)-.95 E F0 .411(This v)144 432 R .412(ariable det\ ermines the collation order used when sorting the results of pathname e) -.25 F(xpansion,)-.15 E 1.465(and determines the beha)144 444 R 1.465 (vior of range e)-.2 F 1.464(xpressions, equi)-.15 F -.25(va)-.25 G 1.464(lence classes, and collating sequences).25 F(within pathname e)144 456 Q(xpansion and pattern matching.)-.15 E F1(LC_CTYPE)108 468 Q F0 1.935(This v)144 480 R 1.936 (ariable determines the interpretation of characters and the beha)-.25 F 1.936(vior of character classes)-.2 F(within pathname e)144 492 Q (xpansion and pattern matching.)-.15 E F1(LC_MESSA)108 504 Q(GES)-.55 E F0(This v)144 516 Q(ariable determines the locale used to translate dou\ ble-quoted strings preceded by a)-.25 E F1($)2.5 E F0(.)A F1(LC_NUMERIC) 108 528 Q F0(This v)144 540 Q(ariable determines the locale cate)-.25 E (gory used for number formatting.)-.15 E F1(LC_TIME)108 552 Q F0(This v) 144 564 Q(ariable determines the locale cate)-.25 E (gory used for data and time formatting.)-.15 E F1(LINES)108 576 Q F0 .055(Used by the)144 576 R F1(select)2.555 E F0 .054(compound command t\ o determine the column length for printing selection lists.)2.555 F .264 (Automatically set if the)144 588 R F1(checkwinsize)2.764 E F0 .264 (option is enabled or in an interacti)2.764 F .565 -.15(ve s)-.25 H .265 (hell upon receipt of a).15 F F3(SIGWINCH)144 600 Q/F4 9/Times-Roman@0 SF(.)A F1(MAIL)108 612 Q F0 .422 (If this parameter is set to a \214le or directory name and the)144 612 R F3(MAILP)2.921 E -.855(AT)-.666 G(H).855 E F0 -.25(va)2.671 G .421 (riable is not set,).25 F F1(bash)2.921 E F0(in-)2.921 E (forms the user of the arri)144 624 Q -.25(va)-.25 G 2.5(lo).25 G 2.5 (fm)-2.5 G(ail in the speci\214ed \214le or Maildir)-2.5 E (-format directory)-.2 E(.)-.65 E F1(MAILCHECK)108 636 Q F0 .098 (Speci\214es ho)144 648 R 2.598(wo)-.25 G .098(ften \(in seconds\)) -2.598 F F1(bash)2.598 E F0 .098(checks for mail.)2.598 F .098(The def) 5.098 F .098(ault is 60 seconds.)-.1 F .099(When it is time)5.099 F .224 (to check for mail, the shell does so before displaying the primary pro\ mpt.)144 660 R .223(If this v)5.223 F .223(ariable is unset,)-.25 F (or set to a v)144 672 Q(alue that is not a number greater than or equa\ l to zero, the shell disables mail checking.)-.25 E F1(MAILP)108 684 Q -.95(AT)-.74 G(H).95 E F0 2.99(Ac)144 696 S .49 (olon-separated list of \214lenames to be check)-2.99 F .49 (ed for mail.)-.1 F .49(The message to be printed when mail)5.49 F(arri) 144 708 Q -.15(ve)-.25 G 2.62(si).15 G 2.62(nap)-2.62 G .12(articular \ \214le may be speci\214ed by separating the \214lename from the message\ with a `?'.)-2.62 F(When used in the te)144 720 Q(xt of the message,) -.15 E F1($_)2.5 E F0 -.15(ex)2.5 G (pands to the name of the current mail\214le.).15 E(Example:)5 E (GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(17)190.395 E 0 Cg EP %%Page: 18 18 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10/Times-Bold@0 SF(MAILP)144 84 Q -.95(AT)-.74 G(H).95 E F0(=\010/v)A(ar/mail/bfox?"Y) -.25 E(ou ha)-1.1 E .3 -.15(ve m)-.2 H (ail":~/shell\255mail?"$_ has mail!"\010).15 E F1(Bash)144 96 Q F0 .015 (can be con\214gured to supply a def)2.515 F .015(ault v)-.1 F .015 (alue for this v)-.25 F .015(ariable \(there is no v)-.25 F .015 (alue by def)-.25 F .015(ault\), b)-.1 F(ut)-.2 E(the location of the u\ ser mail \214les that it uses is system dependent \(e.g., /v)144 108 Q (ar/mail/)-.25 E F1($USER)A F0(\).)A F1(OPTERR)108 120 Q F0 .39 (If set to the v)144 132 R .39(alue 1,)-.25 F F1(bash)2.89 E F0 .389 (displays error messages generated by the)2.889 F F1(getopts)2.889 E F0 -.2(bu)2.889 G .389(iltin command \(see).2 F/F2 9/Times-Bold@0 SF .359 (SHELL B)144 144 R(UIL)-.09 E .359(TIN COMMANDS)-.828 F F0(belo)2.609 E (w\).)-.25 E F2(OPTERR)5.359 E F0 .36 (is initialized to 1 each time the shell is in)2.609 F -.2(vo)-.4 G -.1 (ke).2 G(d).1 E(or a shell script is e)144 156 Q -.15(xe)-.15 G(cuted.) .15 E F1 -.74(PA)108 168 S(TH)-.21 E F0 .588 (The search path for commands.)144 168 R .587 (It is a colon-separated list of directories in which the shell looks) 5.588 F .471(for commands \(see)144 180 R F2 .471(COMMAND EXECUTION) 2.971 F F0(belo)2.722 E 2.972(w\). A)-.25 F .472 (zero-length \(null\) directory name in the)2.972 F -.25(va)144 192 S .536(lue of).25 F F2 -.666(PA)3.036 G(TH)-.189 E F0 .535 (indicates the current directory)2.786 F 5.535(.A)-.65 G .535 (null directory name may appear as tw)-2.5 F 3.035(oa)-.1 G(djacent) -3.035 E .867(colons, or as an initial or trailing colon.)144 204 R .868 (The def)5.868 F .868(ault path is system-dependent, and is set by the) -.1 F(administrator who installs)144 216 Q F1(bash)2.5 E F0 5(.A)C (common v)-2.5 E(alue is)-.25 E/F3 10/Courier@0 SF (/usr/local/bin:/usr/lo-)2.5 E(cal/sbin:/usr/bin:/usr/sbin:/bin:/sbin) 144 228 Q F0(.)A F1(POSIXL)108 240 Q(Y_CORRECT)-.92 E F0 .471(If this v) 144 252 R .471(ariable is in the en)-.25 F .471(vironment when)-.4 F F1 (bash)2.971 E F0 .471(starts, the shell enters)2.971 F/F4 10 /Times-Italic@0 SF .472(posix mode)2.972 F F0 .472(before reading)2.972 F .011(the startup \214les, as if the)144 264 R F1(\255\255posix)2.511 E F0(in)2.511 E -.2(vo)-.4 G .011(cation option had been supplied.).2 F .011(If it is set while the shell is)5.011 F(running,)144 276 Q F1(bash) 4.497 E F0(enables)4.497 E F4 1.997(posix mode)4.497 F F0 4.497(,a)C 4.497(si)-4.497 G 4.497(ft)-4.497 G 1.997(he command)-4.497 F F3 1.997 (set -o posix)4.497 F F0 1.998(had been e)4.497 F -.15(xe)-.15 G(cuted.) .15 E(When the shell enters)144 288 Q F4(posix mode)2.5 E F0 2.5(,i)C 2.5(ts)-2.5 G(ets this v)-2.5 E(ariable if it w)-.25 E (as not already set.)-.1 E F1(PR)108 300 Q(OMPT_COMMAND)-.3 E F0 .155 (If this v)144 312 R .155(ariable is set, and is an array)-.25 F 2.655 (,t)-.65 G .155(he v)-2.655 F .155(alue of each set element is e)-.25 F -.15(xe)-.15 G .155(cuted as a command prior).15 F .407 (to issuing each primary prompt.)144 324 R .407(If this is set b)5.407 F .407(ut not an array v)-.2 F .407(ariable, its v)-.25 F .407 (alue is used as a com-)-.25 F(mand to e)144 336 Q -.15(xe)-.15 G (cute instead.).15 E F1(PR)108 348 Q(OMPT_DIR)-.3 E(TRIM)-.4 E F0 .676 (If set to a number greater than zero, the v)144 360 R .676 (alue is used as the number of trailing directory compo-)-.25 F .923 (nents to retain when e)144 372 R .923(xpanding the)-.15 F F1(\\w)3.423 E F0(and)3.423 E F1(\\W)3.423 E F0 .923(prompt string escapes \(see) 3.423 F F2(PR)3.423 E(OMPTING)-.27 E F0(belo)3.173 E(w\).)-.25 E (Characters remo)144 384 Q -.15(ve)-.15 G 2.5(da).15 G (re replaced with an ellipsis.)-2.5 E F1(PS0)108 396 Q F0 1.174(The v) 144 396 R 1.174(alue of this parameter is e)-.25 F 1.174(xpanded \(see) -.15 F F2(PR)3.674 E(OMPTING)-.27 E F0(belo)3.424 E 1.174 (w\) and displayed by interacti)-.25 F -.15(ve)-.25 G (shells after reading a command and before the command is e)144 408 Q -.15(xe)-.15 G(cuted.).15 E F1(PS1)108 420 Q F0 .064(The v)144 420 R .065(alue of this parameter is e)-.25 F .065(xpanded \(see)-.15 F F2(PR) 2.565 E(OMPTING)-.27 E F0(belo)2.315 E .065 (w\) and used as the primary prompt)-.25 F 2.5(string. The)144 432 R (def)2.5 E(ault v)-.1 E(alue is `)-.25 E(`)-.74 E F1(\\s\255\\v\\$)A F0 -.74('')2.5 G(.).74 E F1(PS2)108 444 Q F0 .118(The v)144 444 R .118 (alue of this parameter is e)-.25 F .118(xpanded as with)-.15 F F2(PS1) 2.617 E F0 .117(and used as the secondary prompt string.)2.367 F(The) 5.117 E(def)144 456 Q(ault is `)-.1 E(`)-.74 E F1(>)A F0 -.74('')2.5 G (.).74 E F1(PS3)108 468 Q F0 1.115(The v)144 468 R 1.115 (alue of this parameter is used as the prompt for the)-.25 F F1(select) 3.615 E F0 1.116(command \(see)3.616 F F2 1.116(SHELL GRAM-)3.616 F(MAR) 144 480 Q F0(abo)2.25 E -.15(ve)-.15 G(\).).15 E F1(PS4)108 492 Q F0 .101(The v)144 492 R .101(alue of this parameter is e)-.25 F .101 (xpanded as with)-.15 F F2(PS1)2.6 E F0 .1(and the v)2.35 F .1 (alue is printed before each command)-.25 F F1(bash)144 504 Q F0 .334 (displays during an e)2.834 F -.15(xe)-.15 G .335(cution trace.).15 F .335(The \214rst character of the e)5.335 F .335(xpanded v)-.15 F .335 (alue of)-.25 F F2(PS4)2.835 E F0 .335(is repli-)2.585 F (cated multiple times, as necessary)144 516 Q 2.5(,t)-.65 G 2.5(oi)-2.5 G(ndicate multiple le)-2.5 E -.15(ve)-.25 G(ls of indirection.).15 E (The def)5 E(ault is `)-.1 E(`)-.74 E F1(+)A F0 -.74('')2.5 G(.).74 E F1 (SHELL)108 528 Q F0 .543(This v)144 540 R .543(ariable e)-.25 F .543 (xpands to the full pathname to the shell.)-.15 F .542 (If it is not set when the shell starts,)5.543 F F1(bash)3.042 E F0 (assigns to it the full pathname of the current user')144 552 Q 2.5(sl) -.55 G(ogin shell.)-2.5 E F1(TIMEFORMA)108 564 Q(T)-.95 E F0 .826(The v) 144 576 R .826 (alue of this parameter is used as a format string specifying ho)-.25 F 3.327(wt)-.25 G .827(he timing information for)-3.327 F .649 (pipelines pre\214x)144 588 R .649(ed with the)-.15 F F1(time)3.149 E F0 (reserv)3.149 E .649(ed w)-.15 F .648(ord should be displayed.)-.1 F (The)5.648 E F1(%)3.148 E F0 .648(character introduces)3.148 F .711 (an escape sequence that is e)144 600 R .711(xpanded to a time v)-.15 F .712(alue or other information.)-.25 F .712(The escape sequences)5.712 F (and their meanings are as follo)144 612 Q (ws; the braces denote optional portions.)-.25 E F1(%%)144 630 Q F0 2.5 (Al)194 630 S(iteral)-2.5 E F1(%)2.5 E F0(.)A F1(%[)144 642 Q F4(p)A F1 (][l]R)A F0(The elapsed time in seconds.)194 642 Q F1(%[)144 654 Q F4(p) A F1(][l]U)A F0(The number of CPU seconds spent in user mode.)194 654 Q F1(%[)144 666 Q F4(p)A F1(][l]S)A F0 (The number of CPU seconds spent in system mode.)194 666 Q F1(%P)144 678 Q F0(The CPU percentage, computed as \(%U + %S\) / %R.)194 678 Q .87 (The optional)144 694.8 R F4(p)3.37 E F0 .87(is a digit specifying the) 3.37 F F4(pr)3.37 E(ecision)-.37 E F0 3.37(,t)C .87 (he number of fractional digits after a decimal)-3.37 F 2.525(point. A) 144 706.8 R -.25(va)2.525 G .025 (lue of 0 causes no decimal point or fraction to be output.).25 F .026 (At most three places after the)5.025 F .538 (decimal point may be speci\214ed; v)144 718.8 R .538(alues of)-.25 F F4 (p)3.038 E F0 .537(greater than 3 are changed to 3.)3.037 F(If)5.537 E F4(p)3.037 E F0 .537(is not speci\214ed,)3.037 F(the v)144 730.8 Q (alue 3 is used.)-.25 E(GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E (18)190.395 E 0 Cg EP %%Page: 19 19 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E .667(The optional) 144 84 R/F1 10/Times-Bold@0 SF(l)3.167 E F0 .668 (speci\214es a longer format, including minutes, of the form)3.168 F/F2 10/Times-Italic@0 SF(MM)3.168 E F0(m)A F2(SS)A F0(.)A F2(FF)A F0 3.168 (s. The)B -.25(va)3.168 G(lue).25 E(of)144 96 Q F2(p)2.5 E F0 (determines whether or not the fraction is included.)2.5 E 13.365 (If this v)144 112.8 R 13.365(ariable is not set,)-.25 F F1(bash)15.865 E F0 13.364(acts as if it had the v)15.865 F(alue)-.25 E F1($\010\\nr) 144 124.8 Q(eal\\t%3lR\\nuser\\t%3lU\\nsys\\t%3lS\010)-.18 E F0 7.113 (.I)C 4.613(ft)-7.113 G 2.113(he v)-4.613 F 2.113 (alue is null, no timing information is dis-)-.25 F 2.5(played. A)144 136.8 R(trailing ne)2.5 E (wline is added when the format string is displayed.)-.25 E F1(TMOUT)108 148.8 Q F0 .941(If set to a v)144 160.8 R .941(alue greater than zero,) -.25 F/F3 9/Times-Bold@0 SF(TMOUT)3.441 E F0 .941(is treated as the def) 3.191 F .941(ault timeout for the)-.1 F F1 -.18(re)3.441 G(ad).18 E F0 -.2(bu)3.441 G(iltin.).2 E(The)144 172.8 Q F1(select)2.81 E F0 .31 (command terminates if input does not arri)2.81 F .611 -.15(ve a)-.25 H (fter).15 E F3(TMOUT)2.811 E F0 .311(seconds when input is com-)2.561 F .886(ing from a terminal.)144 184.8 R .886(In an interacti)5.886 F 1.185 -.15(ve s)-.25 H .885(hell, the v).15 F .885 (alue is interpreted as the number of seconds to)-.25 F -.1(wa)144 196.8 S 1.05(it for a line of input after issuing the primary prompt.).1 F F1 (Bash)6.05 E F0 1.05(terminates after w)3.55 F 1.05(aiting for that)-.1 F(number of seconds if a complete line of input does not arri)144 208.8 Q -.15(ve)-.25 G(.).15 E F1(TMPDIR)108 220.8 Q F0 .391(If set,)144 232.8 R F1(bash)2.891 E F0 .391(uses its v)2.891 F .391 (alue as the name of a directory in which)-.25 F F1(bash)2.89 E F0 .39 (creates temporary \214les for the)2.89 F(shell')144 244.8 Q 2.5(su)-.55 G(se.)-2.5 E F1(auto_r)108 256.8 Q(esume)-.18 E F0 .53(This v)144 268.8 R .53(ariable controls ho)-.25 F 3.03(wt)-.25 G .531 (he shell interacts with the user and job control.)-3.03 F .531 (If this v)5.531 F .531(ariable is set,)-.25 F .539(single w)144 280.8 R .538(ord simple commands without redirections are treated as candidates\ for resumption of an)-.1 F -.15(ex)144 292.8 S .366(isting stopped job) .15 F 5.366(.T)-.4 G .366(here is no ambiguity allo)-5.366 F .366 (wed; if there is more than one job be)-.25 F .367(ginning with)-.15 F 1.125(the string typed, the job most recently accessed is selected.)144 304.8 R(The)6.125 E F2(name)3.985 E F0 1.124(of a stopped job, in this) 3.805 F(conte)144 316.8 Q 1.132 (xt, is the command line used to start it.)-.15 F 1.133(If set to the v) 6.133 F(alue)-.25 E F2 -.2(ex)3.633 G(act).2 E F0 3.633(,t).68 G 1.133 (he string supplied must)-3.633 F .606 (match the name of a stopped job e)144 328.8 R .606(xactly; if set to) -.15 F F2(substring)3.445 E F0 3.105(,t).22 G .605 (he string supplied needs to match a)-3.105 F .884 (substring of the name of a stopped job)144 340.8 R 5.884(.T)-.4 G(he) -5.884 E F2(substring)3.724 E F0 -.25(va)3.604 G .885(lue pro).25 F .885 (vides functionality analogous to)-.15 F(the)144 352.8 Q F1(%?)3.334 E F0 .834(job identi\214er \(see)5.834 F F3 .834(JOB CONTR)3.334 F(OL)-.27 E F0(belo)3.084 E 3.334(w\). If)-.25 F .834(set to an)3.334 F 3.334(yo) -.15 G .834(ther v)-3.334 F .833(alue, the supplied string)-.25 F .315 (must be a pre\214x of a stopped job')144 364.8 R 2.816(sn)-.55 G .316 (ame; this pro)-2.816 F .316(vides functionality analogous to the)-.15 F F1(%)2.816 E F2(string)A F0(job)2.816 E(identi\214er)144 376.8 Q(.)-.55 E F1(histchars)108 388.8 Q F0 .546(The tw)144 400.8 R 3.046(oo)-.1 G 3.046(rt)-3.046 G .546(hree characters which control history e)-3.046 F .545(xpansion and tok)-.15 F .545(enization \(see)-.1 F F3(HIST)3.045 E (OR)-.162 E 2.795(YE)-.315 G(X-)-2.795 E -.666(PA)144 412.8 S(NSION).666 E F0(belo)2.987 E 3.237(w\). The)-.25 F .737(\214rst character is the) 3.237 F F2 .737(history e)3.237 F(xpansion)-.2 E F0(character)3.238 E 3.238(,t)-.4 G .738(he character which sig-)-3.238 F .761 (nals the start of a history e)144 424.8 R .761(xpansion, normally `) -.15 F F1(!)A F0 3.261('. The)B .76(second character is the)3.261 F F2 (quic)3.26 E 3.26(ks)-.2 G(ubstitution)-3.26 E F0(character)144 436.8 Q 3.476(,w)-.4 G .977(hich is used as shorthand for re-running the pre) -3.476 F .977(vious command entered, substituting)-.25 F .131 (one string for another in the command.)144 448.8 R .131(The def)5.131 F .131(ault is `)-.1 F F1(^)A F0 2.63('. The)B .13 (optional third character is the char)2.63 F(-)-.2 E .276(acter which i\ ndicates that the remainder of the line is a comment when found as the \ \214rst character)144 460.8 R .46(of a w)144 472.8 R .46 (ord, normally `)-.1 F F1(#)A F0 2.959('. The)B .459 (history comment character causes history substitution to be skipped) 2.959 F .466(for the remaining w)144 484.8 R .466(ords on the line.)-.1 F .467(It does not necessarily cause the shell parser to treat the rest) 5.467 F(of the line as a comment.)144 496.8 Q F1(Arrays)87 513.6 Q(Bash) 108 525.6 Q F0(pro)3.391 E .891(vides one-dimensional inde)-.15 F -.15 (xe)-.15 G 3.391(da).15 G .891(nd associati)-3.391 F 1.191 -.15(ve a) -.25 H .891(rray v).15 F 3.391(ariables. An)-.25 F 3.391(yv)-.15 G .89 (ariable may be used as an)-3.641 F(inde)108 537.6 Q -.15(xe)-.15 G 2.573(da).15 G .073(rray; the)-2.573 F F1(declar)2.573 E(e)-.18 E F0 -.2 (bu)2.573 G .073(iltin will e).2 F .073(xplicitly declare an array)-.15 F 5.073(.T)-.65 G .074(here is no maximum limit on the size of)-5.073 F .329(an array)108 549.6 R 2.829(,n)-.65 G .329(or an)-2.829 F 2.829(yr) -.15 G .329(equirement that members be inde)-2.829 F -.15(xe)-.15 G 2.829(do).15 G 2.829(ra)-2.829 G .328(ssigned contiguously)-2.829 F 5.328(.I)-.65 G(nde)-5.328 E -.15(xe)-.15 G 2.828(da).15 G .328 (rrays are refer)-2.828 F(-)-.2 E 1.595(enced using inte)108 561.6 R 1.595(gers \(including arithmetic e)-.15 F 1.595 (xpressions\) and are zero-based; associati)-.15 F 1.895 -.15(ve a)-.25 H 1.595(rrays are refer).15 F(-)-.2 E(enced using arbitrary strings.)108 573.6 Q(Unless otherwise noted, inde)5 E -.15(xe)-.15 G 2.5(da).15 G (rray indices must be non-ne)-2.5 E -.05(ga)-.15 G(ti).05 E .3 -.15 (ve i)-.25 H(nte).15 E(gers.)-.15 E 2.463(An inde)108 590.4 R -.15(xe) -.15 G 4.963(da).15 G 2.463(rray is created automatically if an)-4.963 F 4.963(yv)-.15 G 2.462(ariable is assigned to using the syntax)-5.213 F F2(name)4.962 E F0([)A F2(sub-)A(script)108 602.4 Q F0(]=)A F2(value)A F0 5.506(.T)C(he)-5.506 E F2(subscript)3.346 E F0 .507 (is treated as an arithmetic e)3.687 F .507(xpression that must e)-.15 F -.25(va)-.25 G .507(luate to a number).25 F 5.507(.T)-.55 G 3.007(oe) -6.307 G(x-)-3.157 E 1.193(plicitly declare an inde)108 614.4 R -.15(xe) -.15 G 3.693(da).15 G(rray)-3.693 E 3.693(,u)-.65 G(se)-3.693 E F1 (declar)3.693 E 3.693<65ad>-.18 G(a)-3.693 E F2(name)3.693 E F0(\(see) 3.692 E F3 1.192(SHELL B)3.692 F(UIL)-.09 E 1.192(TIN COMMANDS)-.828 F F0(belo)3.442 E(w\).)-.25 E F1(de-)6.192 E(clar)108 626.4 Q 2.5<65ad> -.18 G(a)-2.5 E F2(name)2.5 E F1([)A F2(subscript)A F1(])A F0 (is also accepted; the)2.5 E F2(subscript)2.5 E F0(is ignored.)2.5 E (Associati)108 643.2 Q .3 -.15(ve a)-.25 H(rrays are created using).15 E F1(declar)2.5 E 2.5<65ad>-.18 G(A)-2.5 E F2(name)2.5 E F0(.)A(Attrib)108 660 Q .94(utes may be speci\214ed for an array v)-.2 F .941 (ariable using the)-.25 F F1(declar)3.441 E(e)-.18 E F0(and)3.441 E F1 -.18(re)3.441 G(adonly).18 E F0 -.2(bu)3.441 G 3.441(iltins. Each).2 F (attrib)3.441 E(ute)-.2 E(applies to all members of an array)108 672 Q (.)-.65 E 1.647 (Arrays are assigned to using compound assignments of the form)108 688.8 R F2(name)4.147 E F0(=)A F1(\()A F0 -.25(va)C(lue).25 E F2(1)A F0 1.647 (... v)4.147 F(alue)-.25 E F2(n)A F1(\))A F0 4.147(,w)C 1.647(here each) -4.147 F F2(value)108 700.8 Q F0 .211(may be of the form [)2.711 F F2 (subscript)A F0(]=)A F2(string)A F0 5.211(.I)C(nde)-5.211 E -.15(xe)-.15 G 2.711(da).15 G .212(rray assignments do not require an)-2.711 F .212 (ything b)-.15 F(ut)-.2 E F2(string)2.712 E F0(.)A(Each)108 712.8 Q F2 (value)2.53 E F0 .029(in the list is e)2.529 F .029 (xpanded using all the shell e)-.15 F .029(xpansions described belo)-.15 F 2.529(wu)-.25 G(nder)-2.529 E F3(EXP)2.529 E(ANSION)-.666 E/F4 9 /Times-Roman@0 SF(.)A F0(When)4.529 E .995(assigning to inde)108 724.8 R -.15(xe)-.15 G 3.495(da).15 G .995(rrays, if the optional brack)-3.495 F .996(ets and subscript are supplied, that inde)-.1 F 3.496(xi)-.15 G 3.496(sa)-3.496 G .996(ssigned to;)-3.496 F(GNU Bash 5.1)72 768 Q (2020 October 29)141.235 E(19)190.395 E 0 Cg EP %%Page: 20 20 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E .417 (otherwise the inde)108 84 R 2.917(xo)-.15 G 2.917(ft)-2.917 G .417 (he element assigned is the last inde)-2.917 F 2.917(xa)-.15 G .416 (ssigned to by the statement plus one.)-2.917 F(Inde)5.416 E(x-)-.15 E (ing starts at zero.)108 96 Q 1.288(When assigning to an associati)108 112.8 R 1.588 -.15(ve a)-.25 H(rray).15 E 3.788(,t)-.65 G 1.288(he w) -3.788 F 1.288(ords in a compound assignment may be either assignment) -.1 F .608 (statements, for which the subscript is required, or a list of w)108 124.8 R .608(ords that is interpreted as a sequence of alter)-.1 F(-)-.2 E 1.956(nating k)108 136.8 R -.15(ey)-.1 G 4.456(sa).15 G 1.956(nd v) -4.456 F(alues:)-.25 E/F1 10/Times-Italic@0 SF(name)4.456 E F0(=)A/F2 10 /Times-Bold@0 SF(\()A F1 -.1(ke)4.456 G 1.957(y1 value1 k)-.2 F -.3(ey) -.1 G 4.457(2v).3 G(alue2)-4.457 E F0(...)4.457 E F2(\))A F0 6.957(.T)C 1.957(hese are treated identically to)-6.957 F F1(name)4.457 E F0(=)A F2 (\()A F0([)108 148.8 Q F1 -.1(ke)C(y1)-.2 E F0(]=)A F1(value1)A F0([) 3.133 E F1 -.1(ke)C(y2)-.2 E F0(]=)A F1(value2)A F0(...)3.133 E F2(\))A F0 5.633(.T)C .633(he \214rst w)-5.633 F .633 (ord in the list determines ho)-.1 F 3.132(wt)-.25 G .632 (he remaining w)-3.132 F .632(ords are inter)-.1 F(-)-.2 E .153 (preted; all assignments in a list must be of the same type.)108 160.8 R .154(When using k)5.154 F -.15(ey)-.1 G(/v).15 E .154(alue pairs, the k) -.25 F -.15(ey)-.1 G 2.654(sm).15 G .154(ay not be)-2.654 F (missing or empty; a \214nal missing v)108 172.8 Q(alue is treated lik) -.25 E 2.5(et)-.1 G(he empty string.)-2.5 E .24 (This syntax is also accepted by the)108 189.6 R F2(declar)2.74 E(e)-.18 E F0 -.2(bu)2.739 G 2.739(iltin. Indi).2 F .239 (vidual array elements may be assigned to using the)-.25 F F1(name)108 201.6 Q F0([)A F1(subscript)A F0(]=)A F1(value)A F0 1.917 (syntax introduced abo)4.416 F -.15(ve)-.15 G 6.917(.W).15 G 1.917 (hen assigning to an inde)-6.917 F -.15(xe)-.15 G 4.417(da).15 G(rray) -4.417 E 4.417(,i)-.65 G(f)-4.417 E F1(name)4.777 E F0 1.917(is sub-) 4.597 F .116(scripted by a ne)108 213.6 R -.05(ga)-.15 G(ti).05 E .416 -.15(ve n)-.25 H(umber).15 E 2.616(,t)-.4 G .115 (hat number is interpreted as relati)-2.616 F .415 -.15(ve t)-.25 H 2.615(oo).15 G .115(ne greater than the maximum inde)-2.615 F(x)-.15 E (of)108 225.6 Q F1(name)2.676 E F0 2.676(,s)C 2.676(on)-2.676 G -2.25 -.15(eg a)-2.676 H(ti).15 E .476 -.15(ve i)-.25 H .177 (ndices count back from the end of the array).15 F 2.677(,a)-.65 G .177 (nd an inde)-2.677 F 2.677(xo)-.15 G 2.677<66ad>-2.677 G 2.677(1r)-2.677 G .177(eferences the last el-)-2.677 F(ement.)108 237.6 Q(An)108 254.4 Q 3.576(ye)-.15 G 1.076(lement of an array may be referenced using ${) -3.576 F F1(name)A F0([)A F1(subscript)A F0 3.575(]}. The)B 1.075 (braces are required to a)3.575 F -.2(vo)-.2 G(id).2 E 1.541 (con\215icts with pathname e)108 266.4 R 4.041(xpansion. If)-.15 F F1 (subscript)4.041 E F0(is)4.041 E F2(@)4.041 E F0(or)4.041 E F2(*)4.041 E F0 4.041(,t)C 1.541(he w)-4.041 F 1.541(ord e)-.1 F 1.541 (xpands to all members of)-.15 F F1(name)4.042 E F0(.)A 1.057 (These subscripts dif)108 278.4 R 1.057(fer only when the w)-.25 F 1.057 (ord appears within double quotes.)-.1 F 1.056(If the w)6.056 F 1.056 (ord is double-quoted,)-.1 F(${)108 290.4 Q F1(name)A F0 .52([*]} e)B .52(xpands to a single w)-.15 F .52(ord with the v)-.1 F .521 (alue of each array member separated by the \214rst character)-.25 F 1.375(of the)108 302.4 R/F3 9/Times-Bold@0 SF(IFS)3.875 E F0 1.375 (special v)3.625 F 1.375(ariable, and ${)-.25 F F1(name)A F0 1.375 ([@]} e)B 1.375(xpands each element of)-.15 F F1(name)3.875 E F0 1.374 (to a separate w)3.875 F 3.874(ord. When)-.1 F 2.027 (there are no array members, ${)108 314.4 R F1(name)A F0 2.028([@]} e)B 2.028(xpands to nothing.)-.15 F 2.028(If the double-quoted e)7.028 F 2.028(xpansion occurs)-.15 F .759(within a w)108 326.4 R .759 (ord, the e)-.1 F .759 (xpansion of the \214rst parameter is joined with the be)-.15 F .759 (ginning part of the original w)-.15 F(ord,)-.1 E .515(and the e)108 338.4 R .516(xpansion of the last parameter is joined with the last par\ t of the original w)-.15 F 3.016(ord. This)-.1 F .516(is analogous)3.016 F .228(to the e)108 350.4 R .228(xpansion of the special parameters)-.15 F F2(*)2.728 E F0(and)2.728 E F2(@)2.728 E F0(\(see)2.728 E F2 .228 (Special P)2.728 F(arameters)-.1 E F0(abo)2.727 E -.15(ve)-.15 G 2.727 (\). ${#).15 F F1(name)A F0([)A F1(subscript)A F0(]})A -.15(ex)108 362.4 S .886(pands to the length of ${).15 F F1(name)A F0([)A F1(subscript)A F0 3.386(]}. If)B F1(subscript)3.386 E F0(is)3.386 E F2(*)3.386 E F0(or) 3.386 E F2(@)3.386 E F0 3.386(,t)C .886(he e)-3.386 F .886 (xpansion is the number of ele-)-.15 F .295(ments in the array)108 374.4 R 5.295(.I)-.65 G 2.795(ft)-5.295 G(he)-2.795 E F1(subscript)3.135 E F0 .295(used to reference an element of an inde)3.475 F -.15(xe)-.15 G 2.794(da).15 G .294(rray e)-2.794 F -.25(va)-.25 G .294 (luates to a number).25 F .628 (less than zero, it is interpreted as relati)108 386.4 R .928 -.15(ve t) -.25 H 3.128(oo).15 G .629(ne greater than the maximum inde)-3.128 F 3.129(xo)-.15 G 3.129(ft)-3.129 G .629(he array)-3.129 F 3.129(,s)-.65 G 3.129(on)-3.129 G -2.25 -.15(eg a)-3.129 H(ti).15 E -.15(ve)-.25 G (indices count back from the end of the array)108 398.4 Q 2.5(,a)-.65 G (nd an inde)-2.5 E 2.5(xo)-.15 G 2.5<66ad>-2.5 G 2.5(1r)-2.5 G (eferences the last element.)-2.5 E .595(Referencing an array v)108 415.2 R .595(ariable without a subscript is equi)-.25 F -.25(va)-.25 G .595(lent to referencing the array with a subscript of).25 F 2.5(0. An) 108 427.2 R 2.5(yr)-.15 G(eference to a v)-2.5 E(ariable using a v)-.25 E(alid subscript is le)-.25 E -.05(ga)-.15 G(l, and).05 E F2(bash)2.5 E F0(will create an array if necessary)2.5 E(.)-.65 E(An array v)108 444 Q (ariable is considered set if a subscript has been assigned a v)-.25 E 2.5(alue. The)-.25 F(null string is a v)2.5 E(alid v)-.25 E(alue.)-.25 E .417(It is possible to obtain the k)108 460.8 R -.15(ey)-.1 G 2.918(s\() .15 G .418(indices\) of an array as well as the v)-2.918 F 2.918 (alues. ${)-.25 F F2(!)A F1(name)A F0([)A F1(@)A F0 .418(]} and ${)B F2 (!)A F1(name)A F0([)A F1(*)A F0(]})A -.15(ex)108 472.8 S .75 (pand to the indices assigned in array v).15 F(ariable)-.25 E F1(name) 3.249 E F0 5.749(.T)C .749 (he treatment when in double quotes is similar to)-5.749 F(the e)108 484.8 Q(xpansion of the special parameters)-.15 E F1(@)2.5 E F0(and)2.5 E F1(*)2.5 E F0(within double quotes.)2.5 E(The)108 501.6 Q F2(unset) 2.766 E F0 -.2(bu)2.766 G .267(iltin is used to destro).2 F 2.767(ya)-.1 G(rrays.)-2.767 E F2(unset)5.267 E F1(name)2.767 E F0([)A F1(subscript)A F0 2.767(]d)C(estro)-2.767 E .267(ys the array element at inde)-.1 F(x) -.15 E F1(sub-)2.767 E(script)108 513.6 Q F0 2.858(,f)C .358 (or both inde)-2.858 F -.15(xe)-.15 G 2.858(da).15 G .358(nd associati) -2.858 F .658 -.15(ve a)-.25 H 2.858(rrays. Ne).15 F -.05(ga)-.15 G(ti) .05 E .658 -.15(ve s)-.25 H .358(ubscripts to inde).15 F -.15(xe)-.15 G 2.858(da).15 G .358(rrays are interpreted as de-)-2.858 F 1.204 (scribed abo)108 525.6 R -.15(ve)-.15 G 6.204(.U).15 G 1.204 (nsetting the last element of an array v)-6.204 F 1.205 (ariable does not unset the v)-.25 F(ariable.)-.25 E F2(unset)6.205 E F1 (name)3.705 E F0(,)A(where)108 537.6 Q F1(name)2.5 E F0(is an array)2.5 E 2.5(,o)-.65 G(r)-2.5 E F2(unset)2.5 E F1(name)2.5 E F0([)A F1 (subscript)A F0(], where)A F1(subscript)2.5 E F0(is)2.5 E F2(*)2.5 E F0 (or)2.5 E F2(@)2.5 E F0 2.5(,r)C(emo)-2.5 E -.15(ve)-.15 G 2.5(st).15 G (he entire array)-2.5 E(.)-.65 E .029(When using a v)108 554.4 R .029 (ariable name with a subscript as an ar)-.25 F .028 (gument to a command, such as with)-.18 F F2(unset)2.528 E F0 2.528(,w)C .028(ithout us-)-2.528 F .937(ing the w)108 566.4 R .937(ord e)-.1 F .937(xpansion syntax described abo)-.15 F -.15(ve)-.15 G 3.437(,t).15 G .937(he ar)-3.437 F .938(gument is subject to pathname e)-.18 F 3.438 (xpansion. If)-.15 F(path-)3.438 E(name e)108 578.4 Q (xpansion is not desired, the ar)-.15 E(gument should be quoted.)-.18 E (The)108 595.2 Q F2(declar)2.684 E(e)-.18 E F0(,)A F2(local)2.684 E F0 2.684(,a)C(nd)-2.684 E F2 -.18(re)2.684 G(adonly).18 E F0 -.2(bu)2.684 G .184(iltins each accept a).2 F F22.684 E F0 .184 (option to specify an inde)2.684 F -.15(xe)-.15 G 2.683(da).15 G .183 (rray and a)-2.683 F F22.683 E F0(op-)2.683 E .041 (tion to specify an associati)108 607.2 R .341 -.15(ve a)-.25 H(rray).15 E 5.041(.I)-.65 G 2.541(fb)-5.041 G .041(oth options are supplied,) -2.541 F F22.541 E F0(tak)2.541 E .041(es precedence.)-.1 F(The) 5.041 E F2 -.18(re)2.542 G(ad).18 E F0 -.2(bu)2.542 G .042(iltin ac-).2 F .864(cepts a)108 619.2 R F23.364 E F0 .864 (option to assign a list of w)3.364 F .864 (ords read from the standard input to an array)-.1 F 5.863(.T)-.65 G(he) -5.863 E F2(set)3.363 E F0(and)3.363 E F2(declar)3.363 E(e)-.18 E F0 -.2 (bu)108 631.2 S(iltins display array v).2 E(alues in a w)-.25 E (ay that allo)-.1 E(ws them to be reused as assignments.)-.25 E/F4 10.95 /Times-Bold@0 SF(EXP)72 648 Q(ANSION)-.81 E F0 .76(Expansion is perform\ ed on the command line after it has been split into w)108 660 R 3.26 (ords. There)-.1 F .76(are se)3.26 F -.15(ve)-.25 G 3.26(nk).15 G .76 (inds of)-3.26 F -.15(ex)108 672 S .201(pansion performed:).15 F F1(br) 2.971 E .201(ace e)-.15 F(xpansion)-.2 E F0(,).24 E F1 .201(tilde e) 2.831 F(xpansion)-.2 E F0(,).24 E F1(par)3.951 E .201 (ameter and variable e)-.15 F(xpansion)-.2 E F0(,).24 E F1 .2 (command sub-)2.901 F(stitution)108 684 Q F0(,).24 E F1(arithmetic e) 2.83 E(xpansion)-.2 E F0(,).24 E F1(wor)2.84 E 2.5(ds)-.37 G(plitting) -2.5 E F0 2.5(,a).22 G(nd)-2.5 E F1(pathname e)3.75 E(xpansion)-.2 E F0 (.).24 E .418(The order of e)108 700.8 R .418(xpansions is: brace e)-.15 F .418(xpansion; tilde e)-.15 F .419(xpansion, parameter and v)-.15 F .419(ariable e)-.25 F .419(xpansion, arithmetic)-.15 F -.15(ex)108 712.8 S .196(pansion, and command substitution \(done in a left-to-right f).15 F .195(ashion\); w)-.1 F .195(ord splitting; and pathname e)-.1 F(xpan-) -.15 E(sion.)108 724.8 Q(GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E (20)190.395 E 0 Cg EP %%Page: 21 21 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E .257 (On systems that can support it, there is an additional e)108 84 R .257 (xpansion a)-.15 F -.25(va)-.2 G(ilable:).25 E/F1 10/Times-Italic@0 SF (pr)2.757 E .257(ocess substitution)-.45 F F0 5.257(.T)C .257 (his is per)-5.257 F(-)-.2 E (formed at the same time as tilde, parameter)108 96 Q 2.5(,v)-.4 G (ariable, and arithmetic e)-2.75 E(xpansion and command substitution.) -.15 E .003(After these e)108 112.8 R .003 (xpansions are performed, quote characters present in the original w) -.15 F .002(ord are remo)-.1 F -.15(ve)-.15 G 2.502(du).15 G .002 (nless the)-2.502 F(y)-.15 E(ha)108 124.8 Q .3 -.15(ve b)-.2 H (een quoted themselv).15 E(es \()-.15 E F1(quote r)A(emo)-.37 E(val)-.1 E F0(\).)A .171(Only brace e)108 141.6 R .171(xpansion, w)-.15 F .171 (ord splitting, and pathname e)-.1 F .171 (xpansion can increase the number of w)-.15 F .172(ords of the e)-.1 F (x-)-.15 E .777(pansion; other e)108 153.6 R .776(xpansions e)-.15 F .776(xpand a single w)-.15 F .776(ord to a single w)-.1 F 3.276 (ord. The)-.1 F .776(only e)3.276 F .776(xceptions to this are the e) -.15 F(x-)-.15 E .695(pansions of ")108 165.6 R/F2 10/Times-Bold@0 SF ($@)A F0 3.195("a)C .695(nd ")-3.195 F F2(${)A F1(name)A F2([@]})A F0 .696(", and, in most cases,)B F2($*)3.196 E F0(and)3.196 E F2(${)3.196 E F1(name)A F2([*]})A F0 .696(as e)3.196 F .696(xplained abo)-.15 F .996 -.15(ve \()-.15 H(see).15 E/F3 9/Times-Bold@0 SF -.666(PA)3.196 G(-).666 E(RAMETERS)108 177.6 Q/F4 9/Times-Roman@0 SF(\).)A F2(Brace Expansion)87 194.4 Q F1(Br)108.58 206.4 Q .606(ace e)-.15 F(xpansion)-.2 E F0 .606 (is a mechanism by which arbitrary strings may be generated.)3.346 F .606(This mechanism is similar)5.606 F(to)108 218.4 Q F1 .415 (pathname e)2.915 F(xpansion)-.2 E F0 2.915(,b)C .415 (ut the \214lenames generated need not e)-3.115 F 2.915(xist. P)-.15 F .415(atterns to be brace e)-.15 F .415(xpanded tak)-.15 F 2.915(et)-.1 G (he)-2.915 E .074(form of an optional)108 230.4 R F1(pr)3.823 E(eamble) -.37 E F0 2.573(,f).18 G(ollo)-2.573 E .073 (wed by either a series of comma-separated strings or a sequence e)-.25 F(xpres-)-.15 E .489(sion between a pair of braces, follo)108 242.4 R .489(wed by an optional)-.25 F F1(postscript)4.239 E F0 5.49(.T).68 G .49(he preamble is pre\214x)-5.49 F .49(ed to each string)-.15 F .659(c\ ontained within the braces, and the postscript is then appended to each\ resulting string, e)108 254.4 R .658(xpanding left to)-.15 F(right.)108 266.4 Q .718(Brace e)108 283.2 R .719(xpansions may be nested.)-.15 F .719(The results of each e)5.719 F .719 (xpanded string are not sorted; left to right order is)-.15 F(preserv) 108 295.2 Q 2.5(ed. F)-.15 F(or e)-.15 E(xample, a)-.15 E F2({)A F0 (d,c,b)A F2(})A F0 2.5(ee)C(xpands into `ade ace abe'.)-2.65 E 3.243(As) 108 312 S .743(equence e)-3.243 F .743(xpression tak)-.15 F .743 (es the form)-.1 F F2({)3.243 E F1(x)A F2(..)A F1(y)A F2([..)A F1(incr)A F2(]})A F0 3.243(,w)C(here)-3.243 E F1(x)3.243 E F0(and)3.242 E F1(y) 3.242 E F0 .742(are either inte)3.242 F .742(gers or single characters,) -.15 F(and)108 324 Q F1(incr)3.031 E F0 3.031(,a)C 3.032(no)-3.031 G .532(ptional increment, is an inte)-3.032 F(ger)-.15 E 5.532(.W)-.55 G .532(hen inte)-5.532 F .532(gers are supplied, the e)-.15 F .532 (xpression e)-.15 F .532(xpands to each)-.15 F .078(number between)108 336 R F1(x)2.578 E F0(and)2.578 E F1(y)2.578 E F0 2.578(,i)C(nclusi) -2.578 E -.15(ve)-.25 G 5.078(.S).15 G .078(upplied inte)-5.078 F .077 (gers may be pre\214x)-.15 F .077(ed with)-.15 F F1(0)2.577 E F0 .077 (to force each term to ha)2.577 F .377 -.15(ve t)-.2 H(he).15 E .014 (same width.)108 348 R .014(When either)5.014 F F1(x)2.514 E F0(or)2.514 E F1(y)2.514 E F0(be)2.514 E .015(gins with a zero, the shell attempts \ to force all generated terms to contain)-.15 F 1.143 (the same number of digits, zero-padding where necessary)108 360 R 6.143 (.W)-.65 G 1.143(hen characters are supplied, the e)-6.143 F(xpression) -.15 E -.15(ex)108 372 S 1.064(pands to each character le).15 F 1.064 (xicographically between)-.15 F F1(x)3.564 E F0(and)3.564 E F1(y)3.564 E F0 3.564(,i)C(nclusi)-3.564 E -.15(ve)-.25 G 3.564(,u).15 G 1.064 (sing the def)-3.564 F 1.064(ault C locale.)-.1 F(Note)6.064 E .245 (that both)108 384 R F1(x)2.745 E F0(and)2.745 E F1(y)2.745 E F0 .245 (must be of the same type.)2.745 F .244 (When the increment is supplied, it is used as the dif)5.245 F .244 (ference be-)-.25 F(tween each term.)108 396 Q(The def)5 E (ault increment is 1 or \2551 as appropriate.)-.1 E .581(Brace e)108 412.8 R .581(xpansion is performed before an)-.15 F 3.081(yo)-.15 G .581 (ther e)-3.081 F .581(xpansions, and an)-.15 F 3.082(yc)-.15 G .582 (haracters special to other e)-3.082 F(xpansions)-.15 E .016 (are preserv)108 424.8 R .016(ed in the result.)-.15 F .016 (It is strictly te)5.016 F(xtual.)-.15 E F2(Bash)5.016 E F0 .015 (does not apply an)2.516 F 2.515(ys)-.15 G .015 (yntactic interpretation to the con-)-2.515 F(te)108 436.8 Q (xt of the e)-.15 E(xpansion or the te)-.15 E(xt between the braces.) -.15 E 2.501(Ac)108 453.6 S .001(orrectly-formed brace e)-2.501 F .001(\ xpansion must contain unquoted opening and closing braces, and at least\ one un-)-.15 F .458(quoted comma or a v)108 465.6 R .458 (alid sequence e)-.25 F 2.958(xpression. An)-.15 F 2.958(yi)-.15 G .458 (ncorrectly formed brace e)-2.958 F .457(xpansion is left unchanged.) -.15 F(A)108 477.6 Q F2({)2.521 E F0(or)2.521 E F2(,)2.521 E F0 .021 (may be quoted with a backslash to pre)2.521 F -.15(ve)-.25 G .022 (nt its being considered part of a brace e).15 F 2.522(xpression. T)-.15 F 2.522(oa)-.8 G -.2(vo)-2.722 G(id).2 E .172 (con\215icts with parameter e)108 489.6 R .172(xpansion, the string)-.15 F F2(${)2.672 E F0 .172(is not considered eligible for brace e)2.672 F .172(xpansion, and inhibits)-.15 F(brace e)108 501.6 Q (xpansion until the closing)-.15 E F2(})2.5 E F0(.)A 1.476(This constru\ ct is typically used as shorthand when the common pre\214x of the strin\ gs to be generated is)108 518.4 R(longer than in the abo)108 530.4 Q .3 -.15(ve ex)-.15 H(ample:).15 E(mkdir /usr/local/src/bash/{old,ne)144 547.2 Q -.65(w,)-.25 G(dist,b).65 E(ugs})-.2 E(or)108 559.2 Q(cho)144 571.2 Q(wn root /usr/{ucb/{e)-.25 E(x,edit},lib/{e)-.15 E(x?.?*,ho)-.15 E(w_e)-.25 E(x}})-.15 E .618(Brace e)108 588 R .618 (xpansion introduces a slight incompatibility with historical v)-.15 F .618(ersions of)-.15 F F2(sh)3.118 E F0(.)A F2(sh)5.618 E F0 .618 (does not treat open-)3.118 F .247 (ing or closing braces specially when the)108 600 R 2.747(ya)-.15 G .247 (ppear as part of a w)-2.747 F .248(ord, and preserv)-.1 F .248 (es them in the output.)-.15 F F2(Bash)5.248 E F0(remo)108 612 Q -.15 (ve)-.15 G 3.53(sb).15 G 1.03(races from w)-3.53 F 1.03 (ords as a consequence of brace e)-.1 F 3.53(xpansion. F)-.15 F 1.03 (or e)-.15 F 1.03(xample, a w)-.15 F 1.03(ord entered to)-.1 F F2(sh) 3.53 E F0(as)3.53 E F1(\214le{1,2})108 624 Q F0 .514 (appears identically in the output.)3.014 F .515(The same w)5.515 F .515 (ord is output as)-.1 F F1 .515(\214le1 \214le2)4.925 F F0 .515(after e) 3.035 F .515(xpansion by)-.15 F F2(bash)3.015 E F0(.)A .437 (If strict compatibility with)108 636 R F2(sh)2.936 E F0 .436 (is desired, start)2.936 F F2(bash)2.936 E F0 .436(with the)2.936 F F2 (+B)2.936 E F0 .436(option or disable brace e)2.936 F .436 (xpansion with the)-.15 F F2(+B)108 648 Q F0(option to the)2.5 E F2(set) 2.5 E F0(command \(see)2.5 E F3(SHELL B)2.5 E(UIL)-.09 E(TIN COMMANDS) -.828 E F0(belo)2.25 E(w\).)-.25 E F2 -.18(Ti)87 664.8 S(lde Expansion) .18 E F0 1.086(If a w)108 676.8 R 1.086(ord be)-.1 F 1.086 (gins with an unquoted tilde character \(`)-.15 F F2(~)A F0 1.087 ('\), all of the characters preceding the \214rst unquoted)B .185(slash\ \(or all characters, if there is no unquoted slash\) are considered a) 108 688.8 R F1(tilde-pr)2.685 E(e\214x)-.37 E F0 5.185(.I)C 2.685(fn) -5.185 G .185(one of the characters)-2.685 F .725(in the tilde-pre\214x\ are quoted, the characters in the tilde-pre\214x follo)108 700.8 R .726 (wing the tilde are treated as a possible)-.25 F F1(lo)108 712.8 Q .523 (gin name)-.1 F F0 5.523(.I)C 3.023(ft)-5.523 G .523 (his login name is the null string, the tilde is replaced with the v) -3.023 F .522(alue of the shell parameter)-.25 F F3(HOME)108 724.8 Q F4 (.)A F0(If)6.735 E F3(HOME)4.735 E F0 2.236 (is unset, the home directory of the user e)4.486 F -.15(xe)-.15 G 2.236 (cuting the shell is substituted instead.).15 F(GNU Bash 5.1)72 768 Q (2020 October 29)141.235 E(21)190.395 E 0 Cg EP %%Page: 22 22 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E(Otherwise, the ti\ lde-pre\214x is replaced with the home directory associated with the sp\ eci\214ed login name.)108 84 Q .093 (If the tilde-pre\214x is a `~+', the v)108 100.8 R .092 (alue of the shell v)-.25 F(ariable)-.25 E/F1 9/Times-Bold@0 SF(PWD) 2.592 E F0 .092(replaces the tilde-pre\214x.)2.342 F .092 (If the tilde-pre\214x is)5.092 F 3.403(a`)108 112.8 S .903 (~\255', the v)-3.403 F .903(alue of the shell v)-.25 F(ariable)-.25 E F1(OLDPWD)3.404 E/F2 9/Times-Roman@0 SF(,)A F0 .904 (if it is set, is substituted.)3.154 F .904(If the characters follo) 5.904 F .904(wing the)-.25 F .88 (tilde in the tilde-pre\214x consist of a number)108 124.8 R/F3 10 /Times-Italic@0 SF(N)3.38 E F0 3.38(,o)C .88(ptionally pre\214x)-3.38 F .879(ed by a `+' or a `\255', the tilde-pre\214x is re-)-.15 F .138(pla\ ced with the corresponding element from the directory stack, as it w)108 136.8 R .138(ould be displayed by the)-.1 F/F4 10/Times-Bold@0 SF(dirs) 2.639 E F0 -.2(bu)2.639 G(iltin).2 E(in)108 148.8 Q -.2(vo)-.4 G -.1(ke) .2 G 2.839(dw).1 G .338(ith the tilde-pre\214x as an ar)-2.839 F 2.838 (gument. If)-.18 F .338(the characters follo)2.838 F .338 (wing the tilde in the tilde-pre\214x consist)-.25 F (of a number without a leading `+' or `\255', `+' is assumed.)108 160.8 Q(If the login name is in)108 177.6 Q -.25(va)-.4 G(lid, or the tilde e) .25 E(xpansion f)-.15 E(ails, the w)-.1 E(ord is unchanged.)-.1 E .166 (Each v)108 194.4 R .167(ariable assignment is check)-.25 F .167 (ed for unquoted tilde-pre\214x)-.1 F .167(es immediately follo)-.15 F .167(wing a)-.25 F F4(:)2.667 E F0 .167(or the \214rst)2.667 F F4(=) 2.667 E F0 5.167(.I)C(n)-5.167 E .468(these cases, tilde e)108 206.4 R .468(xpansion is also performed.)-.15 F(Consequently)5.467 E 2.967(,o) -.65 G .467(ne may use \214lenames with tildes in assign-)-2.967 F (ments to)108 218.4 Q F1 -.666(PA)2.5 G(TH)-.189 E F2(,)A F1(MAILP)2.25 E -.855(AT)-.666 G(H).855 E F2(,)A F0(and)2.25 E F1(CDP)2.5 E -.855(AT) -.666 G(H).855 E F2(,)A F0(and the shell assigns the e)2.25 E(xpanded v) -.15 E(alue.)-.25 E .023(Bash also performs tilde e)108 235.2 R .023 (xpansion on w)-.15 F .024(ords satisfying the conditions of v)-.1 F .024(ariable assignments \(as described)-.25 F(abo)108 247.2 Q .77 -.15 (ve u)-.15 H(nder).15 E F1 -.666(PA)2.97 G(RAMETERS).666 E F2(\))A F0 .47(when the)2.72 F 2.969(ya)-.15 G .469(ppear as ar)-2.969 F .469 (guments to simple commands.)-.18 F .469(Bash does not do this,)5.469 F -.15(ex)108 259.2 S(cept for the).15 E F3(declar)2.5 E(ation)-.15 E F0 (commands listed abo)2.5 E -.15(ve)-.15 G 2.5(,w).15 G(hen in)-2.5 E F3 (posix mode)2.5 E F0(.)A F4 -.1(Pa)87 276 S(rameter Expansion).1 E F0 .199(The `)108 288 R F4($)A F0 2.699('c)C .199 (haracter introduces parameter e)-2.699 F .199 (xpansion, command substitution, or arithmetic e)-.15 F 2.7 (xpansion. The)-.15 F(pa-)2.7 E .314(rameter name or symbol to be e)108 300 R .314(xpanded may be enclosed in braces, which are optional b)-.15 F .314(ut serv)-.2 F 2.813(et)-.15 G 2.813(op)-2.813 G(rotect)-2.813 E .414(the v)108 312 R .414(ariable to be e)-.25 F .414 (xpanded from characters immediately follo)-.15 F .415 (wing it which could be interpreted as part of)-.25 F(the name.)108 324 Q 1.19(When braces are used, the matching ending brace is the \214rst `) 108 340.8 R F4(})A F0 3.689('n)C 1.189 (ot escaped by a backslash or within a)-3.689 F .821 (quoted string, and not within an embedded arithmetic e)108 352.8 R .822 (xpansion, command substitution, or parameter e)-.15 F(x-)-.15 E (pansion.)108 364.8 Q(${)108 381.6 Q F3(par)A(ameter)-.15 E F0(})A .106 (The v)144 393.6 R .106(alue of)-.25 F F3(par)2.606 E(ameter)-.15 E F0 .106(is substituted.)2.606 F .106(The braces are required when)5.106 F F3(par)3.856 E(ameter)-.15 E F0 .106(is a positional pa-)3.336 F .11 (rameter with more than one digit, or when)144 405.6 R F3(par)3.86 E (ameter)-.15 E F0 .111(is follo)3.341 F .111 (wed by a character which is not to be)-.25 F .208 (interpreted as part of its name.)144 417.6 R(The)5.208 E F3(par)2.708 E (ameter)-.15 E F0 .208(is a shell parameter as described abo)2.708 F -.15(ve)-.15 G F4 -.74(PA)2.858 G(RAME-).74 E(TERS)144 429.6 Q F0 2.5 (\)o)C 2.5(ra)-2.5 G 2.5(na)-2.5 G(rray reference \()-2.5 E F4(Arrays)A F0(\).)A .346(If the \214rst character of)108 446.4 R F3(par)2.846 E (ameter)-.15 E F0 .346(is an e)2.846 F .346(xclamation point \()-.15 F F4(!)A F0 .346(\), and)B F3(par)2.846 E(ameter)-.15 E F0 .346(is not a) 2.846 F F3(namer)2.846 E(ef)-.37 E F0 2.847(,i)C 2.847(ti)-2.847 G (ntroduces)-2.847 E 2.907(al)108 458.4 S -2.15 -.25(ev e)-2.907 H 2.907 (lo).25 G 2.906(fi)-2.907 G(ndirection.)-2.906 E F4(Bash)5.406 E F0 .406 (uses the v)2.906 F .406(alue formed by e)-.25 F .406 (xpanding the rest of)-.15 F F3(par)2.906 E(ameter)-.15 E F0 .406 (as the ne)2.906 F(w)-.25 E F3(par)2.906 E(ame-)-.15 E(ter)108 470.4 Q F0 2.578(;t)C .078(his is then e)-2.578 F .078(xpanded and that v)-.15 F .079(alue is used in the rest of the e)-.25 F .079 (xpansion, rather than the e)-.15 F .079(xpansion of the)-.15 F (original)108 482.4 Q F3(par)2.543 E(ameter)-.15 E F0 5.043(.T)C .043 (his is kno)-5.043 F .043(wn as)-.25 F F3(indir)2.543 E .043(ect e)-.37 F(xpansion)-.2 E F0 5.043(.T)C .043(he v)-5.043 F .042 (alue is subject to tilde e)-.25 F .042(xpansion, parameter)-.15 F -.15 (ex)108 494.4 S .248(pansion, command substitution, and arithmetic e).15 F 2.748(xpansion. If)-.15 F F3(par)2.749 E(ameter)-.15 E F0 .249 (is a nameref, this e)2.749 F .249(xpands to the)-.15 F 1.51 (name of the parameter referenced by)108 506.4 R F3(par)4.01 E(ameter) -.15 E F0 1.51(instead of performing the complete indirect e)4.01 F (xpansion.)-.15 E .387(The e)108 518.4 R .387 (xceptions to this are the e)-.15 F .387(xpansions of ${)-.15 F F4(!)A F3(pr)A(e\214x)-.37 E F4(*)A F0 2.887(}a)C .387(nd ${)-2.887 F F4(!)A F3 (name)A F0([)A F3(@)A F0 .387(]} described belo)B 4.188 -.65(w. T)-.25 H .388(he e).65 F(xclama-)-.15 E(tion point must immediately follo)108 530.4 Q 2.5(wt)-.25 G(he left brace in order to introduce indirection.) -2.5 E .334(In each of the cases belo)108 547.2 R -.65(w,)-.25 G F3(wor) 3.484 E(d)-.37 E F0 .334(is subject to tilde e)2.834 F .334 (xpansion, parameter e)-.15 F .334(xpansion, command substitution,)-.15 F(and arithmetic e)108 559.2 Q(xpansion.)-.15 E .066 (When not performing substring e)108 576 R .067 (xpansion, using the forms documented belo)-.15 F 2.567(w\()-.25 G (e.g.,)-2.567 E F4(:-)2.567 E F0(\),)A F4(bash)2.567 E F0 .067 (tests for a pa-)2.567 F(rameter that is unset or null.)108 588 Q(Omitt\ ing the colon results in a test only for a parameter that is unset.)5 E (${)108 604.8 Q F3(par)A(ameter)-.15 E F4<3aad>A F3(wor)A(d)-.37 E F0(}) A F4 .723(Use Default V)144 616.8 R(alues)-.92 E F0 5.723(.I)C(f)-5.723 E F3(par)4.473 E(ameter)-.15 E F0 .723(is unset or null, the e)3.953 F .722(xpansion of)-.15 F F3(wor)3.562 E(d)-.37 E F0 .722(is substituted.) 3.992 F(Other)5.722 E(-)-.2 E(wise, the v)144 628.8 Q(alue of)-.25 E F3 (par)3.75 E(ameter)-.15 E F0(is substituted.)3.23 E(${)108 640.8 Q F3 (par)A(ameter)-.15 E F4(:=)A F3(wor)A(d)-.37 E F0(})A F4 .811 (Assign Default V)144 652.8 R(alues)-.92 E F0 5.812(.I)C(f)-5.812 E F3 (par)4.562 E(ameter)-.15 E F0 .812(is unset or null, the e)4.042 F .812 (xpansion of)-.15 F F3(wor)3.652 E(d)-.37 E F0 .812(is assigned to)4.082 F F3(pa-)4.562 E -.15(ra)144 664.8 S(meter).15 E F0 5.742(.T).73 G .742 (he v)-5.742 F .742(alue of)-.25 F F3(par)4.492 E(ameter)-.15 E F0 .742 (is then substituted.)3.972 F .741 (Positional parameters and special parame-)5.742 F (ters may not be assigned to in this w)144 676.8 Q(ay)-.1 E(.)-.65 E(${) 108 688.8 Q F3(par)A(ameter)-.15 E F4(:?)A F3(wor)A(d)-.37 E F0(})A F4 .535(Display Err)144 700.8 R .535(or if Null or Unset)-.18 F F0 5.535 (.I)C(f)-5.535 E F3(par)4.285 E(ameter)-.15 E F0 .535 (is null or unset, the e)3.765 F .535(xpansion of)-.15 F F3(wor)3.035 E (d)-.37 E F0 .535(\(or a mes-)3.035 F .013(sage to that ef)144 712.8 R .013(fect if)-.25 F F3(wor)2.853 E(d)-.37 E F0 .013(is not present\) is\ written to the standard error and the shell, if it is not in-)3.283 F (teracti)144 724.8 Q -.15(ve)-.25 G 2.5(,e).15 G 2.5(xits. Otherwise,) -2.65 F(the v)2.5 E(alue of)-.25 E F3(par)2.5 E(ameter)-.15 E F0 (is substituted.)2.5 E(GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E (22)190.395 E 0 Cg EP %%Page: 23 23 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E(${)108 84 Q/F1 10 /Times-Italic@0 SF(par)A(ameter)-.15 E/F2 10/Times-Bold@0 SF(:+)A F1 (wor)A(d)-.37 E F0(})A F2 .745(Use Alter)144 96 R .745(nate V)-.15 F (alue)-.92 E F0 5.745(.I)C(f)-5.745 E F1(par)4.495 E(ameter)-.15 E F0 .745(is null or unset, nothing is substituted, otherwise the e)3.975 F (xpan-)-.15 E(sion of)144 108 Q F1(wor)2.84 E(d)-.37 E F0 (is substituted.)3.27 E(${)108 120 Q F1(par)A(ameter)-.15 E F2(:)A F1 (of)A(fset)-.18 E F0(})A(${)108 132 Q F1(par)A(ameter)-.15 E F2(:)A F1 (of)A(fset)-.18 E F2(:)A F1(length)A F0(})A F2 .002(Substring Expansion) 144 144 R F0 5.002(.E)C .002(xpands to up to)-5.002 F F1(length)2.502 E F0 .002(characters of the v)2.502 F .002(alue of)-.25 F F1(par)2.502 E (ameter)-.15 E F0 .002(starting at the)2.502 F .235 (character speci\214ed by)144 156 R F1(of)2.735 E(fset)-.18 E F0 5.235 (.I)C(f)-5.235 E F1(par)2.735 E(ameter)-.15 E F0(is)2.735 E F2(@)2.735 E F0 2.735(,a)C 2.735(ni)-2.735 G(nde)-2.735 E -.15(xe)-.15 G 2.735(da).15 G .235(rray subscripted by)-2.735 F F2(@)2.735 E F0(or)2.735 E F2(*) 2.735 E F0 2.735(,o)C 2.735(ra)-2.735 G 2.735(na)-2.735 G(s-)-2.735 E (sociati)144 168 Q 1.578 -.15(ve a)-.25 H 1.278 (rray name, the results dif).15 F 1.277(fer as described belo)-.25 F 5.077 -.65(w. I)-.25 H(f).65 E F1(length)3.777 E F0 1.277(is omitted, e) 3.777 F 1.277(xpands to the)-.15 F .042(substring of the v)144 180 R .042(alue of)-.25 F F1(par)2.542 E(ameter)-.15 E F0 .043 (starting at the character speci\214ed by)2.542 F F1(of)2.543 E(fset) -.18 E F0 .043(and e)2.543 F .043(xtending to the)-.15 F .847 (end of the v)144 192 R(alue.)-.25 E F1(length)5.846 E F0(and)3.346 E F1 (of)3.346 E(fset)-.18 E F0 .846(are arithmetic e)3.346 F .846 (xpressions \(see)-.15 F/F3 9/Times-Bold@0 SF .846(ARITHMETIC EV)3.346 F (ALU)-1.215 E -.855(AT)-.54 G(ION).855 E F0(belo)144 204 Q(w\).)-.25 E (If)144 228 Q F1(of)3.028 E(fset)-.18 E F0 -.25(eva)3.029 G .529 (luates to a number less than zero, the v).25 F .529 (alue is used as an of)-.25 F .529(fset in characters from the)-.25 F .046(end of the v)144 240 R .046(alue of)-.25 F F1(par)2.546 E(ameter) -.15 E F0 5.046(.I)C(f)-5.046 E F1(length)2.546 E F0 -.25(eva)2.546 G .046(luates to a number less than zero, it is interpreted as an).25 F (of)144 252 Q .202(fset in characters from the end of the v)-.25 F .202 (alue of)-.25 F F1(par)2.702 E(ameter)-.15 E F0 .203 (rather than a number of characters, and)2.702 F .558(the e)144 264 R .558(xpansion is the characters between)-.15 F F1(of)3.058 E(fset)-.18 E F0 .558(and that result.)3.058 F .557(Note that a ne)5.557 F -.05(ga) -.15 G(ti).05 E .857 -.15(ve o)-.25 H -.25(ff).15 G .557(set must be).25 F(separated from the colon by at least one space to a)144 276 Q -.2(vo) -.2 G(id being confused with the).2 E F2(:-)2.5 E F0 -.15(ex)2.5 G (pansion.).15 E(If)144 300 Q F1(par)2.958 E(ameter)-.15 E F0(is)2.958 E F2(@)2.958 E F0 2.958(,t)C .458(he result is)-2.958 F F1(length)2.959 E F0 .459(positional parameters be)2.959 F .459(ginning at)-.15 F F1(of) 2.959 E(fset)-.18 E F0 5.459(.A)C(ne)-2.5 E -.05(ga)-.15 G(ti).05 E -.15 (ve)-.25 G F1(of)3.109 E(fset)-.18 E F0 .6(is tak)144 312 R .6 (en relati)-.1 F .9 -.15(ve t)-.25 H 3.1(oo).15 G .6 (ne greater than the greatest positional parameter)-3.1 F 3.1(,s)-.4 G 3.1(oa)-3.1 G 3.1(no)-3.1 G -.25(ff)-3.1 G .6(set of \2551 e).25 F -.25 (va)-.25 G(luates).25 E .639(to the last positional parameter)144 324 R 5.639(.I)-.55 G 3.139(ti)-5.639 G 3.139(sa)-3.139 G 3.139(ne)-3.139 G .639(xpansion error if)-3.289 F F1(length)3.14 E F0 -.25(eva)3.14 G .64 (luates to a number less than).25 F(zero.)144 336 Q(If)144 360 Q F1(par) 3.014 E(ameter)-.15 E F0 .514(is an inde)3.014 F -.15(xe)-.15 G 3.014 (da).15 G .514(rray name subscripted by @ or *, the result is the)-3.014 F F1(length)3.014 E F0 .513(members of)3.013 F 1.081(the array be)144 372 R 1.081(ginning with ${)-.15 F F1(par)A(ameter)-.15 E F0([)A F1(of)A (fset)-.18 E F0 3.581(]}. A)B(ne)3.581 E -.05(ga)-.15 G(ti).05 E -.15 (ve)-.25 G F1(of)3.732 E(fset)-.18 E F0 1.082(is tak)3.582 F 1.082 (en relati)-.1 F 1.382 -.15(ve t)-.25 H 3.582(oo).15 G 1.082(ne greater) -3.582 F 1.08(than the maximum inde)144 384 R 3.58(xo)-.15 G 3.58(ft) -3.58 G 1.08(he speci\214ed array)-3.58 F 6.079(.I)-.65 G 3.579(ti) -6.079 G 3.579(sa)-3.579 G 3.579(ne)-3.579 G 1.079(xpansion error if) -3.729 F F1(length)3.579 E F0 -.25(eva)3.579 G 1.079(luates to a).25 F (number less than zero.)144 396 Q(Substring e)144 420 Q (xpansion applied to an associati)-.15 E .3 -.15(ve a)-.25 H (rray produces unde\214ned results.).15 E .82(Substring inde)144 444 R .821(xing is zero-based unless the positional parameters are used, in w\ hich case the in-)-.15 F(de)144 456 Q .159(xing starts at 1 by def)-.15 F 2.659(ault. If)-.1 F F1(of)2.659 E(fset)-.18 E F0 .159 (is 0, and the positional parameters are used,)2.659 F F2($0)2.659 E F0 .159(is pre\214x)2.659 F .158(ed to)-.15 F(the list.)144 468 Q(${)108 484.8 Q F2(!)A F1(pr)A(e\214x)-.37 E F2(*)A F0(})A(${)108 496.8 Q F2(!)A F1(pr)A(e\214x)-.37 E F2(@)A F0(})A F2 .084(Names matching pr)144 508.8 R(e\214x)-.18 E F0 5.084(.E)C .084(xpands to the names of v)-5.084 F .084(ariables whose names be)-.25 F .085(gin with)-.15 F F1(pr)2.585 E (e\214x)-.37 E F0 2.585(,s)C(epa-)-2.585 E .258 (rated by the \214rst character of the)144 520.8 R F3(IFS)2.758 E F0 .257(special v)2.507 F 2.757(ariable. When)-.25 F F1(@)2.757 E F0 .257 (is used and the e)2.757 F .257(xpansion appears)-.15 F (within double quotes, each v)144 532.8 Q(ariable name e)-.25 E (xpands to a separate w)-.15 E(ord.)-.1 E(${)108 549.6 Q F2(!)A F1(name) A F0([)A F1(@)A F0(]})A(${)108 561.6 Q F2(!)A F1(name)A F0([)A F1(*)A F0 (]})A F2 1.136(List of array k)144 573.6 R(eys)-.1 E F0 6.136(.I)C(f) -6.136 E F1(name)3.636 E F0 1.136(is an array v)3.636 F 1.136 (ariable, e)-.25 F 1.136(xpands to the list of array indices \(k)-.15 F -.15(ey)-.1 G 1.137(s\) as-).15 F .397(signed in)144 585.6 R F1(name) 2.897 E F0 5.397(.I)C(f)-5.397 E F1(name)2.897 E F0 .397 (is not an array)2.897 F 2.897(,e)-.65 G .397(xpands to 0 if)-3.047 F F1 (name)2.897 E F0 .397(is set and null otherwise.)2.897 F(When)5.397 E F1 (@)2.897 E F0(is used and the e)144 597.6 Q (xpansion appears within double quotes, each k)-.15 E .3 -.15(ey ex)-.1 H(pands to a separate w).15 E(ord.)-.1 E(${)108 614.4 Q F2(#)A F1(par)A (ameter)-.15 E F0(})A F2 -.1(Pa)144 626.4 S .47(rameter length).1 F F0 5.47(.T)C .471(he length in characters of the v)-5.47 F .471(alue of) -.25 F F1(par)2.971 E(ameter)-.15 E F0 .471(is substituted.)2.971 F(If) 5.471 E F1(par)4.221 E(ame-)-.15 E(ter)144 638.4 Q F0(is)3.627 E F2(*) 2.897 E F0(or)2.897 E F2(@)2.897 E F0 2.897(,t)C .397(he v)-2.897 F .397 (alue substituted is the number of positional parameters.)-.25 F(If) 5.396 E F1(par)4.146 E(ameter)-.15 E F0 .396(is an ar)3.626 F(-)-.2 E .78(ray name subscripted by)144 650.4 R F2(*)3.28 E F0(or)3.28 E F2(@) 3.28 E F0 3.28(,t)C .78(he v)-3.28 F .781 (alue substituted is the number of elements in the array)-.25 F 5.781 (.I)-.65 G(f)-5.781 E F1(par)145.25 662.4 Q(ameter)-.15 E F0 .456 (is an inde)3.686 F -.15(xe)-.15 G 2.956(da).15 G .456 (rray name subscripted by a ne)-2.956 F -.05(ga)-.15 G(ti).05 E .756 -.15(ve n)-.25 H(umber).15 E 2.955(,t)-.4 G .455 (hat number is interpreted)-2.955 F .972(as relati)144 674.4 R 1.272 -.15(ve t)-.25 H 3.472(oo).15 G .973(ne greater than the maximum inde) -3.472 F 3.473(xo)-.15 G(f)-3.473 E F1(par)3.473 E(ameter)-.15 E F0 3.473(,s)C 3.473(on)-3.473 G -2.25 -.15(eg a)-3.473 H(ti).15 E 1.273 -.15(ve i)-.25 H .973(ndices count back).15 F(from the end of the array) 144 686.4 Q 2.5(,a)-.65 G(nd an inde)-2.5 E 2.5(xo)-.15 G 2.5<66ad>-2.5 G 2.5(1r)-2.5 G(eferences the last element.)-2.5 E(${)108 703.2 Q F1 (par)A(ameter)-.15 E F2(#)A F1(wor)A(d)-.37 E F0(})A(GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(23)190.395 E 0 Cg EP %%Page: 24 24 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E(${)108 84 Q/F1 10 /Times-Italic@0 SF(par)A(ameter)-.15 E/F2 10/Times-Bold@0 SF(##)A F1 (wor)A(d)-.37 E F0(})A F2(Remo)144 96 Q 1.396 -.1(ve m)-.1 H 1.196 (atching pr).1 F 1.196(e\214x patter)-.18 F(n)-.15 E F0 6.196(.T)C(he) -6.196 E F1(wor)4.036 E(d)-.37 E F0 1.196(is e)4.466 F 1.196 (xpanded to produce a pattern just as in path-)-.15 F .543(name e)144 108 R .544(xpansion, and matched ag)-.15 F .544(ainst the e)-.05 F .544 (xpanded v)-.15 F .544(alue of)-.25 F F1(par)4.294 E(ameter)-.15 E F0 .544(using the rules described)3.774 F(under)144 120 Q F2 -.1(Pa)3.133 G (tter).1 E 3.133(nM)-.15 G(atching)-3.133 E F0(belo)3.132 E 4.432 -.65 (w. I)-.25 H 3.132(ft).65 G .632(he pattern matches the be)-3.132 F .632 (ginning of the v)-.15 F .632(alue of)-.25 F F1(par)4.382 E(ameter)-.15 E F0(,).73 E 1.151(then the result of the e)144 132 R 1.151 (xpansion is the e)-.15 F 1.151(xpanded v)-.15 F 1.151(alue of)-.25 F F1 (par)4.902 E(ameter)-.15 E F0 1.152(with the shortest matching)4.382 F .184(pattern \(the `)144 144 R(`)-.74 E F2(#)A F0 1.664 -.74('' c)D .184 (ase\) or the longest matching pattern \(the `).74 F(`)-.74 E F2(##)A F0 1.664 -.74('' c)D .184(ase\) deleted.).74 F(If)5.183 E F1(par)3.933 E (ameter)-.15 E F0(is)3.413 E F2(@)2.683 E F0(or)144 156 Q F2(*)3.018 E F0 3.018(,t)C .518(he pattern remo)-3.018 F -.25(va)-.15 G 3.018(lo).25 G .518 (peration is applied to each positional parameter in turn, and the e) -3.018 F(xpan-)-.15 E .304(sion is the resultant list.)144 168 R(If) 5.304 E F1(par)4.054 E(ameter)-.15 E F0 .303(is an array v)3.533 F .303 (ariable subscripted with)-.25 F F2(@)2.803 E F0(or)2.803 E F2(*)2.803 E F0 2.803(,t)C .303(he pattern re-)-2.803 F(mo)144 180 Q -.25(va)-.15 G 2.987(lo).25 G .487 (peration is applied to each member of the array in turn, and the e) -2.987 F .487(xpansion is the resultant)-.15 F(list.)144 192 Q(${)108 208.8 Q F1(par)A(ameter)-.15 E F2(%)A F1(wor)A(d)-.37 E F0(})A(${)108 220.8 Q F1(par)A(ameter)-.15 E F2(%%)A F1(wor)A(d)-.37 E F0(})A F2(Remo) 144 232.8 Q .347 -.1(ve m)-.1 H .147(atching suf\214x patter).1 F(n)-.15 E F0 5.147(.T)C(he)-5.147 E F1(wor)2.647 E(d)-.37 E F0 .147(is e)2.647 F .146(xpanded to produce a pattern just as in pathname)-.15 F -.15(ex)144 244.8 S .458(pansion, and matched ag).15 F .458(ainst the e)-.05 F .458 (xpanded v)-.15 F .458(alue of)-.25 F F1(par)4.209 E(ameter)-.15 E F0 .459(using the rules described under)3.689 F F2 -.1(Pa)144 256.8 S(tter) .1 E 3.314(nM)-.15 G(atching)-3.314 E F0(belo)3.314 E 4.614 -.65(w. I) -.25 H 3.314(ft).65 G .814 (he pattern matches a trailing portion of the e)-3.314 F .814(xpanded v) -.15 F .814(alue of)-.25 F F1(pa-)4.564 E -.15(ra)144 268.8 S(meter).15 E F0 3.816(,t).73 G 1.316(hen the result of the e)-3.816 F 1.317 (xpansion is the e)-.15 F 1.317(xpanded v)-.15 F 1.317(alue of)-.25 F F1 (par)5.067 E(ameter)-.15 E F0 1.317(with the shortest)4.547 F 1.085 (matching pattern \(the `)144 280.8 R(`)-.74 E F2(%)A F0 2.565 -.74 ('' c)D 1.084(ase\) or the longest matching pattern \(the `).74 F(`)-.74 E F2(%%)A F0 2.564 -.74('' c)D 1.084(ase\) deleted.).74 F(If)6.084 E F1 (par)145.25 292.8 Q(ameter)-.15 E F0(is)3.389 E F2(@)2.659 E F0(or)2.659 E F2(*)2.659 E F0 2.659(,t)C .159(he pattern remo)-2.659 F -.25(va)-.15 G 2.659(lo).25 G .16 (peration is applied to each positional parameter in turn,)-2.659 F .51 (and the e)144 304.8 R .51(xpansion is the resultant list.)-.15 F(If) 5.51 E F1(par)4.259 E(ameter)-.15 E F0 .509(is an array v)3.739 F .509 (ariable subscripted with)-.25 F F2(@)3.009 E F0(or)3.009 E F2(*)3.009 E F0(,)A .422(the pattern remo)144 316.8 R -.25(va)-.15 G 2.922(lo).25 G .422(peration is applied to each member of the array in turn, and the e) -2.922 F .423(xpansion is)-.15 F(the resultant list.)144 328.8 Q(${)108 345.6 Q F1(par)A(ameter)-.15 E F2(/)A F1(pattern)A F2(/)A F1(string)A F0 (})A F2 -.1(Pa)144 357.6 S(tter).1 E 3.607(ns)-.15 G(ubstitution)-3.607 E F0 6.107(.T)C(he)-6.107 E F1(pattern)3.607 E F0 1.107(is e)3.607 F 1.106(xpanded to produce a pattern just as in pathname e)-.15 F(xpan-) -.15 E(sion,)144 369.6 Q F1 -.8(Pa)3.7 G -.15(ra).8 G(meter).15 E F0 1.2 (is e)3.7 F 1.2(xpanded and the longest match of)-.15 F F1(pattern)3.7 E F0(ag)3.7 E 1.2(ainst its v)-.05 F 1.2(alue is replaced with)-.25 F F1 (string)144 381.6 Q F0 5.397(.T)C .397 (he match is performed using the rules described under)-5.397 F F2 -.1 (Pa)2.896 G(tter).1 E 2.896(nM)-.15 G(atching)-2.896 E F0(belo)2.896 E 4.196 -.65(w. I)-.25 H(f).65 E F1(pat-)2.896 E(tern)144 393.6 Q F0(be) 2.569 E .069(gins with)-.15 F F2(/)2.569 E F0 2.569(,a)C .069 (ll matches of)-2.569 F F1(pattern)2.569 E F0 .069(are replaced with) 2.569 F F1(string)2.57 E F0 5.07(.N)C .07 (ormally only the \214rst match is)-5.07 F 2.58(replaced. If)144 405.6 R F1(pattern)2.58 E F0(be)2.58 E .08(gins with)-.15 F F2(#)2.58 E F0 2.58 (,i)C 2.58(tm)-2.58 G .079(ust match at the be)-2.58 F .079 (ginning of the e)-.15 F .079(xpanded v)-.15 F .079(alue of)-.25 F F1 (par)2.579 E(am-)-.15 E(eter)144 417.6 Q F0 5.761(.I)C(f)-5.761 E F1 (pattern)3.261 E F0(be)3.261 E .761(gins with)-.15 F F2(%)3.261 E F0 3.261(,i)C 3.261(tm)-3.261 G .761(ust match at the end of the e)-3.261 F .761(xpanded v)-.15 F .761(alue of)-.25 F F1(par)3.262 E(ameter)-.15 E F0 5.762(.I)C(f)-5.762 E F1(string)144 429.6 Q F0 .958 (is null, matches of)3.458 F F1(pattern)3.458 E F0 .958 (are deleted and the)3.458 F F2(/)3.458 E F0(follo)3.458 E(wing)-.25 E F1(pattern)3.457 E F0 .957(may be omitted.)3.457 F .957(If the)5.957 F F2(nocasematch)144 441.6 Q F0 .492 (shell option is enabled, the match is performed without re)2.992 F -.05 (ga)-.15 G .492(rd to the case of alpha-).05 F .884(betic characters.) 144 453.6 R(If)5.884 E F1(par)4.634 E(ameter)-.15 E F0(is)4.114 E F2(@) 3.384 E F0(or)3.383 E F2(*)3.383 E F0 3.383(,t)C .883 (he substitution operation is applied to each positional)-3.383 F 1.002 (parameter in turn, and the e)144 465.6 R 1.002 (xpansion is the resultant list.)-.15 F(If)6.002 E F1(par)4.752 E (ameter)-.15 E F0 1.002(is an array v)4.232 F 1.002(ariable sub-)-.25 F .159(scripted with)144 477.6 R F2(@)2.659 E F0(or)2.659 E F2(*)2.659 E F0 2.659(,t)C .159(he substitution operation is applied to each member \ of the array in turn, and)-2.659 F(the e)144 489.6 Q (xpansion is the resultant list.)-.15 E(${)108 506.4 Q F1(par)A(ameter) -.15 E F2(^)A F1(pattern)A F0(})A(${)108 518.4 Q F1(par)A(ameter)-.15 E F2(^^)A F1(pattern)A F0(})A(${)108 530.4 Q F1(par)A(ameter)-.15 E F2(,)A F1(pattern)A F0(})A(${)108 542.4 Q F1(par)A(ameter)-.15 E F2(,,)A F1 (pattern)A F0(})A F2 .437(Case modi\214cation)144 554.4 R F0 5.437(.T)C .437(his e)-5.437 F .438 (xpansion modi\214es the case of alphabetic characters in)-.15 F F1(par) 2.938 E(ameter)-.15 E F0 5.438(.T)C(he)-5.438 E F1(pattern)144 566.4 Q F0 .374(is e)2.874 F .374 (xpanded to produce a pattern just as in pathname e)-.15 F 2.874 (xpansion. Each)-.15 F .373(character in the e)2.873 F(x-)-.15 E .513 (panded v)144 578.4 R .513(alue of)-.25 F F1(par)3.013 E(ameter)-.15 E F0 .513(is tested ag)3.013 F(ainst)-.05 E F1(pattern)3.013 E F0 3.013 (,a)C .514(nd, if it matches the pattern, its case is con-)-3.013 F -.15 (ve)144 590.4 S 2.823(rted. The).15 F .323 (pattern should not attempt to match more than one character)2.823 F 5.322(.T)-.55 G(he)-5.322 E F2(^)2.822 E F0 .322(operator con)2.822 F -.15(ve)-.4 G(rts).15 E(lo)144 602.4 Q .18(wercase letters matching)-.25 F F1(pattern)2.681 E F0 .181(to uppercase; the)2.681 F F2(,)2.681 E F0 .181(operator con)2.681 F -.15(ve)-.4 G .181 (rts matching uppercase letters).15 F .085(to lo)144 614.4 R 2.585 (wercase. The)-.25 F F2(^^)2.585 E F0(and)2.585 E F2(,,)2.585 E F0 -.15 (ex)2.585 G .085(pansions con).15 F -.15(ve)-.4 G .085 (rt each matched character in the e).15 F .085(xpanded v)-.15 F .085 (alue; the)-.25 F F2(^)2.585 E F0(and)144 626.4 Q F2(,)3.59 E F0 -.15 (ex)3.59 G 1.09(pansions match and con).15 F -.15(ve)-.4 G 1.091 (rt only the \214rst character in the e).15 F 1.091(xpanded v)-.15 F 3.591(alue. If)-.25 F F1(pattern)3.591 E F0(is)3.591 E 1.121 (omitted, it is treated lik)144 638.4 R 3.621(ea)-.1 G F2(?)A F0 3.621 (,w)C 1.121(hich matches e)-3.621 F -.15(ve)-.25 G 1.121(ry character) .15 F 6.12(.I)-.55 G(f)-6.12 E F1(par)4.87 E(ameter)-.15 E F0(is)4.35 E F2(@)3.62 E F0(or)3.62 E F2(*)3.62 E F0 3.62(,t)C 1.12(he case)-3.62 F .339(modi\214cation operation is applied to each positional parameter i\ n turn, and the e)144 650.4 R .34(xpansion is the re-)-.15 F .25 (sultant list.)144 662.4 R(If)5.25 E F1(par)4 E(ameter)-.15 E F0 .25 (is an array v)3.48 F .249(ariable subscripted with)-.25 F F2(@)2.749 E F0(or)2.749 E F2(*)2.749 E F0 2.749(,t)C .249 (he case modi\214cation oper)-2.749 F(-)-.2 E (ation is applied to each member of the array in turn, and the e)144 674.4 Q(xpansion is the resultant list.)-.15 E(${)108 691.2 Q F1(par)A (ameter)-.15 E F2(@)A F1(oper)A(ator)-.15 E F0(})A F2 -.1(Pa)144 703.2 S .86(rameter transf).1 F(ormation)-.25 E F0 5.86(.T)C .86(he e)-5.86 F .86(xpansion is either a transformation of the v)-.15 F .86(alue of)-.25 F F1(par)3.36 E(ameter)-.15 E F0 .154(or information about)144 715.2 R F1(par)2.654 E(ameter)-.15 E F0 .153(itself, depending on the v)2.654 F .153(alue of)-.25 F F1(oper)2.653 E(ator)-.15 E F0 5.153(.E)C(ach)-5.153 E F1(oper)2.653 E(ator)-.15 E F0 .153(is a sin-)2.653 F(gle letter:)144 727.2 Q(GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(24)190.395 E 0 Cg EP %%Page: 25 25 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10/Times-Bold@0 SF(U)144 84 Q F0 .142(The e)180 84 R .142 (xpansion is a string that is the v)-.15 F .142(alue of)-.25 F/F2 10 /Times-Italic@0 SF(par)2.642 E(ameter)-.15 E F0 .142(with lo)2.642 F .143(wercase alphabetic charac-)-.25 F(ters con)180 96 Q -.15(ve)-.4 G (rted to uppercase.).15 E F1(u)144 108 Q F0 .43(The e)180 108 R .43 (xpansion is a string that is the v)-.15 F .429(alue of)-.25 F F2(par) 2.929 E(ameter)-.15 E F0 .429(with the \214rst character con)2.929 F -.15(ve)-.4 G(rted).15 E(to uppercase, if it is alphabetic.)180 120 Q F1 (L)144 132 Q F0 .124(The e)180 132 R .124 (xpansion is a string that is the v)-.15 F .124(alue of)-.25 F F2(par) 2.624 E(ameter)-.15 E F0 .125(with uppercase alphabetic charac-)2.625 F (ters con)180 144 Q -.15(ve)-.4 G(rted to lo).15 E(wercase.)-.25 E F1(Q) 144 156 Q F0 1.065(The e)180 156 R 1.065 (xpansion is a string that is the v)-.15 F 1.065(alue of)-.25 F F2(par) 3.565 E(ameter)-.15 E F0 1.064(quoted in a format that can be)3.565 F (reused as input.)180 168 Q F1(E)144 180 Q F0 .44(The e)180 180 R .441 (xpansion is a string that is the v)-.15 F .441(alue of)-.25 F F2(par) 2.941 E(ameter)-.15 E F0 .441(with backslash escape sequences)2.941 F -.15(ex)180 192 S(panded as with the).15 E F1($'...)2.5 E(')-.55 E F0 (quoting mechanism.)2.5 E F1(P)144 204 Q F0 1.073(The e)180 204 R 1.073 (xpansion is a string that is the result of e)-.15 F 1.073 (xpanding the v)-.15 F 1.073(alue of)-.25 F F2(par)3.573 E(ameter)-.15 E F0 1.073(as if it)3.573 F(were a prompt string \(see)180 216 Q F1(PR)2.5 E(OMPTING)-.3 E F0(belo)2.5 E(w\).)-.25 E F1(A)144 228 Q F0 1.137(The e) 180 228 R 1.138 (xpansion is a string in the form of an assignment statement or)-.15 F F1(declar)3.638 E(e)-.18 E F0(command)3.638 E(that, if e)180 240 Q -.25 (va)-.25 G(luated, will recreate).25 E F2(par)2.5 E(ameter)-.15 E F0 (with its attrib)2.5 E(utes and v)-.2 E(alue.)-.25 E F1(K)144 252 Q F0 1.34(Produces a possibly-quoted v)180 252 R 1.339(ersion of the v)-.15 F 1.339(alue of)-.25 F F2(par)3.839 E(ameter)-.15 E F0 3.839(,e)C 1.339 (xcept that it prints the)-3.989 F -.25(va)180 264 S .257(lues of inde) .25 F -.15(xe)-.15 G 2.757(da).15 G .257(nd associati)-2.757 F .557 -.15 (ve a)-.25 H .257(rrays as a sequence of quoted k).15 F -.15(ey)-.1 G (-v).15 E .257(alue pairs \(see)-.25 F F1(Ar)2.758 E(-)-.37 E(rays)180 276 Q F0(abo)2.5 E -.15(ve)-.15 G(\).).15 E F1(a)144 288 Q F0(The e)180 288 Q(xpansion is a string consisting of \215ag v)-.15 E (alues representing)-.25 E F2(par)2.5 E(ameter)-.15 E F0 1.1 -.55('s a)D (ttrib).55 E(utes.)-.2 E(If)144 304.8 Q F2(par)4.403 E(ameter)-.15 E F0 (is)3.883 E F1(@)3.153 E F0(or)3.153 E F1(*)3.153 E F0 3.153(,t)C .653(\ he operation is applied to each positional parameter in turn, and the e) -3.153 F(x-)-.15 E .403(pansion is the resultant list.)144 316.8 R(If) 5.403 E F2(par)4.153 E(ameter)-.15 E F0 .403(is an array v)3.633 F .403 (ariable subscripted with)-.25 F F1(@)2.903 E F0(or)2.903 E F1(*)2.903 E F0 2.903(,t)C .403(he opera-)-2.903 F (tion is applied to each member of the array in turn, and the e)144 328.8 Q(xpansion is the resultant list.)-.15 E .708(The result of the e) 144 352.8 R .708(xpansion is subject to w)-.15 F .708 (ord splitting and pathname e)-.1 F .708(xpansion as described be-)-.15 F(lo)144 364.8 Q -.65(w.)-.25 G F1(Command Substitution)87 381.6 Q F2 1.697(Command substitution)108 393.6 R F0(allo)4.197 E 1.697 (ws the output of a command to replace the command name.)-.25 F 1.698 (There are tw)6.698 F(o)-.1 E(forms:)108 405.6 Q F1($\()144 422.4 Q F2 (command)A F1(\))1.666 E F0(or)108 434.4 Q F1<92>144 446.4 Q F2(command) A F1<92>A(Bash)108 463.2 Q F0 .089(performs the e)2.589 F .089 (xpansion by e)-.15 F -.15(xe)-.15 G(cuting).15 E F2(command)2.589 E F0 .088(in a subshell en)2.589 F .088(vironment and replacing the command) -.4 F .41(substitution with the standard output of the command, with an) 108 475.2 R 2.91(yt)-.15 G .41(railing ne)-2.91 F .41(wlines deleted.) -.25 F .41(Embedded ne)5.41 F(w-)-.25 E .192(lines are not deleted, b) 108 487.2 R .192(ut the)-.2 F 2.692(ym)-.15 G .192(ay be remo)-2.692 F -.15(ve)-.15 G 2.692(dd).15 G .192(uring w)-2.692 F .192(ord splitting.) -.1 F .192(The command substitution)5.192 F F1($\(cat)2.691 E F2(\214le) 2.691 E F1(\))A F0(can be replaced by the equi)108 499.2 Q -.25(va)-.25 G(lent b).25 E(ut f)-.2 E(aster)-.1 E F1($\(<)2.5 E F2(\214le)2.5 E F1 (\))A F0(.)A 1.724(When the old-style backquote form of substitution is\ used, backslash retains its literal meaning e)108 516 R(xcept)-.15 E .315(when follo)108 528 R .315(wed by)-.25 F F1($)2.815 E F0(,)A F1<92> 2.815 E F0 2.815(,o)C(r)-2.815 E F1(\\)2.815 E F0 5.315(.T)C .314(he \ \214rst backquote not preceded by a backslash terminates the command su\ b-)-5.315 F 3.886(stitution. When)108 540 R 1.386(using the $\()3.886 F F2(command).833 E F0 3.886(\)f)1.666 G 1.387 (orm, all characters between the parentheses mak)-3.886 F 3.887(eu)-.1 G 3.887(pt)-3.887 G 1.387(he com-)-3.887 F (mand; none are treated specially)108 552 Q(.)-.65 E .894 (Command substitutions may be nested.)108 568.8 R 2.494 -.8(To n)5.894 H .894(est when using the backquoted form, escape the inner back-).8 F (quotes with backslashes.)108 580.8 Q .422 (If the substitution appears within double quotes, w)108 597.6 R .422 (ord splitting and pathname e)-.1 F .423(xpansion are not performed)-.15 F(on the results.)108 609.6 Q F1(Arithmetic Expansion)87 626.4 Q F0 1.035(Arithmetic e)108 638.4 R 1.035(xpansion allo)-.15 F 1.035 (ws the e)-.25 F -.25(va)-.25 G 1.034(luation of an arithmetic e).25 F 1.034(xpression and the substitution of the result.)-.15 F (The format for arithmetic e)108 650.4 Q(xpansion is:)-.15 E F1($\(\() 144 667.2 Q F2 -.2(ex)C(pr).2 E(ession)-.37 E F1(\)\))A F0(The)108 684 Q F2 -.2(ex)2.665 G(pr).2 E(ession)-.37 E F0 .165 (is treated as if it were within double quotes, b)2.905 F .166 (ut a double quote inside the parentheses is not)-.2 F .231 (treated specially)108 696 R 5.231(.A)-.65 G .231(ll tok)-5.231 F .231 (ens in the e)-.1 F .231(xpression under)-.15 F .231(go parameter and v) -.18 F .23(ariable e)-.25 F .23(xpansion, command substi-)-.15 F .048 (tution, and quote remo)108 708 R -.25(va)-.15 G 2.548(l. The).25 F .048 (result is treated as the arithmetic e)2.548 F .048(xpression to be e) -.15 F -.25(va)-.25 G 2.549(luated. Arithmetic).25 F -.15(ex)2.549 G(-) .15 E(pansions may be nested.)108 720 Q(GNU Bash 5.1)72 768 Q (2020 October 29)141.235 E(25)190.395 E 0 Cg EP %%Page: 26 26 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E 1.379(The e)108 84 R -.25(va)-.25 G 1.378 (luation is performed according to the rules listed belo).25 F 3.878(wu) -.25 G(nder)-3.878 E/F1 9/Times-Bold@0 SF 1.378(ARITHMETIC EV)3.878 F (ALU)-1.215 E -.855(AT)-.54 G(ION).855 E/F2 9/Times-Roman@0 SF(.)A F0 (If)5.878 E/F3 10/Times-Italic@0 SF -.2(ex)108 96 S(pr).2 E(ession)-.37 E F0(is in)2.74 E -.25(va)-.4 G(lid,).25 E/F4 10/Times-Bold@0 SF(bash) 2.5 E F0(prints a message indicating f)2.5 E (ailure and no substitution occurs.)-.1 E F4(Pr)87 112.8 Q (ocess Substitution)-.18 E F3(Pr)108 124.8 Q .405(ocess substitution) -.45 F F0(allo)2.905 E .405(ws a process')-.25 F 2.905(si)-.55 G .405 (nput or output to be referred to using a \214lename.)-2.905 F .405 (It tak)5.405 F .405(es the form)-.1 F(of)108 136.8 Q F4(<\()3.251 E F3 (list)A F4(\)).833 E F0(or)3.251 E F4(>\()3.251 E F3(list)A F4(\)).833 E F0 5.751(.T)C .751(he process)-5.751 F F3(list)3.251 E F0 .751 (is run asynchronously)3.251 F 3.251(,a)-.65 G .751 (nd its input or output appears as a \214lename.)-3.251 F .147 (This \214lename is passed as an ar)108 148.8 R .148 (gument to the current command as the result of the e)-.18 F 2.648 (xpansion. If)-.15 F(the)2.648 E F4(>\()2.648 E F3(list)A F4(\)).833 E F0 .56(form is used, writing to the \214le will pro)108 160.8 R .56 (vide input for)-.15 F F3(list)3.059 E F0 5.559(.I)C 3.059(ft)-5.559 G (he)-3.059 E F4(<\()3.059 E F3(list)A F4(\)).833 E F0 .559 (form is used, the \214le passed as an)3.059 F(ar)108 172.8 Q .308 (gument should be read to obtain the output of)-.18 F F3(list)2.808 E F0 5.308(.P)C .309(rocess substitution is supported on systems that sup-) -5.308 F(port named pipes \()108 184.8 Q F3(FIFOs)A F0 2.5(\)o)C 2.5(rt) -2.5 G(he)-2.5 E F4(/de)2.5 E(v/fd)-.15 E F0 (method of naming open \214les.)2.5 E .897(When a)108 201.6 R -.25(va) -.2 G .896(ilable, process substitution is performed simultaneously wit\ h parameter and v).25 F .896(ariable e)-.25 F(xpansion,)-.15 E (command substitution, and arithmetic e)108 213.6 Q(xpansion.)-.15 E F4 -.75(Wo)87 230.4 S(rd Splitting).75 E F0 1.142 (The shell scans the results of parameter e)108 242.4 R 1.143 (xpansion, command substitution, and arithmetic e)-.15 F 1.143 (xpansion that)-.15 F(did not occur within double quotes for)108 254.4 Q F3(wor)2.84 E 2.5(ds)-.37 G(plitting)-2.5 E F0(.).22 E .063 (The shell treats each character of)108 271.2 R F1(IFS)2.563 E F0 .063 (as a delimiter)2.313 F 2.563(,a)-.4 G .063 (nd splits the results of the other e)-2.563 F .063(xpansions into w) -.15 F(ords)-.1 E .207(using these characters as \214eld terminators.) 108 283.2 R(If)5.207 E F1(IFS)2.707 E F0 .207(is unset, or its v)2.457 F .207(alue is e)-.25 F(xactly)-.15 E F4()2.708 E F0 (,)A .837(the def)108 295.2 R .837(ault, then sequences of)-.1 F F4 ()3.337 E F0(,)A F4()3.337 E F0 3.337(,a)C(nd)-3.337 E F4 ()3.337 E F0 .836(at the be)3.336 F .836 (ginning and end of the results of)-.15 F .345(the pre)108 307.2 R .345 (vious e)-.25 F .345(xpansions are ignored, and an)-.15 F 2.845(ys)-.15 G .345(equence of)-2.845 F F1(IFS)2.845 E F0 .345 (characters not at the be)2.595 F .345(ginning or end serv)-.15 F(es) -.15 E 1.237(to delimit w)108 319.2 R 3.737(ords. If)-.1 F F1(IFS)3.737 E F0 1.236(has a v)3.486 F 1.236(alue other than the def)-.25 F 1.236 (ault, then sequences of the whitespace characters)-.1 F F4(space)108 331.2 Q F0(,)A F4(tab)2.506 E F0 2.506(,a)C(nd)-2.506 E F4(newline)2.506 E F0 .006(are ignored at the be)2.506 F .006(ginning and end of the w) -.15 F .007(ord, as long as the whitespace charac-)-.1 F .921 (ter is in the v)108 343.2 R .92(alue of)-.25 F F1(IFS)3.42 E F0(\(an) 3.17 E F1(IFS)3.42 E F0 .92(whitespace character\).)3.17 F(An)5.92 E 3.42(yc)-.15 G .92(haracter in)-3.42 F F1(IFS)3.42 E F0 .92(that is not) 3.17 F F1(IFS)3.42 E F0(whitespace,)3.17 E .428(along with an)108 355.2 R 2.928(ya)-.15 G(djacent)-2.928 E F1(IFS)2.928 E F0 .428 (whitespace characters, delimits a \214eld.)2.678 F 2.928(As)5.428 G .428(equence of)-2.928 F F1(IFS)2.928 E F0 .429(whitespace charac-)2.679 F(ters is also treated as a delimiter)108 367.2 Q 5(.I)-.55 G 2.5(ft)-5 G(he v)-2.5 E(alue of)-.25 E F1(IFS)2.5 E F0(is null, no w)2.25 E (ord splitting occurs.)-.1 E .783(Explicit null ar)108 384 R .783 (guments \()-.18 F F4 .833("").833 G F0(or)2.449 E F4 .833<0808>4.115 G F0 3.282(\)a)C .782 (re retained and passed to commands as empty strings.)-3.282 F .782 (Unquoted im-)5.782 F .178(plicit null ar)108 396 R .179 (guments, resulting from the e)-.18 F .179 (xpansion of parameters that ha)-.15 F .479 -.15(ve n)-.2 H 2.679(ov).15 G .179(alues, are remo)-2.929 F -.15(ve)-.15 G 2.679(d. If).15 F 2.679 (ap)2.679 G(a-)-2.679 E .319(rameter with no v)108 408 R .319(alue is e) -.25 F .319(xpanded within double quotes, a null ar)-.15 F .319 (gument results and is retained and passed)-.18 F (to a command as an empty string.)108 420 Q(When a quoted null ar)5 E .001(gument appears as part of a w)-.18 F .001(ord whose e)-.1 F (xpansion)-.15 E .984(is non-null, the null ar)108 432 R .984 (gument is remo)-.18 F -.15(ve)-.15 G 3.483(d. That).15 F .983 (is, the w)3.483 F(ord)-.1 E/F5 10/Courier@0 SF -5.1673.483 F F0(becomes)3.483 E F53.483 E F0 .983(after w)3.483 F .983 (ord splitting and)-.1 F(null ar)108 444 Q(gument remo)-.18 E -.25(va) -.15 G(l.).25 E(Note that if no e)108 460.8 Q (xpansion occurs, no splitting is performed.)-.15 E F4 -.1(Pa)87 477.6 S (thname Expansion).1 E F0 .37(After w)108 489.6 R .37 (ord splitting, unless the)-.1 F F42.87 E F0 .37 (option has been set,)2.87 F F4(bash)2.87 E F0 .371(scans each w)2.871 F .371(ord for the characters)-.1 F F4(*)2.871 E F0(,)A F4(?)2.871 E F0 2.871(,a)C(nd)-2.871 E F4([)2.871 E F0(.)A .634 (If one of these characters appears, and is not quoted, then the w)108 501.6 R .634(ord is re)-.1 F -.05(ga)-.15 G .633(rded as a).05 F F3 (pattern)4.383 E F0 3.133(,a).24 G .633(nd replaced)-3.133 F 1.34(with \ an alphabetically sorted list of \214lenames matching the pattern \(see) 108 513.6 R F1 -.09(Pa)3.84 G(tter).09 E 3.59(nM)-.135 G(atching)-3.59 E F0(belo)3.59 E 3.84(w\). If)-.25 F(no)3.84 E .534 (matching \214lenames are found, and the shell option)108 525.6 R F4 (nullglob)3.034 E F0 .534(is not enabled, the w)3.034 F .534 (ord is left unchanged.)-.1 F(If)5.534 E(the)108 537.6 Q F4(nullglob) 3.284 E F0 .785(option is set, and no matches are found, the w)3.284 F .785(ord is remo)-.1 F -.15(ve)-.15 G 3.285(d. If).15 F(the)3.285 E F4 (failglob)3.285 E F0 .785(shell option is)3.285 F .754(set, and no matc\ hes are found, an error message is printed and the command is not e)108 549.6 R -.15(xe)-.15 G 3.254(cuted. If).15 F .754(the shell)3.254 F (option)108 561.6 Q F4(nocaseglob)3.263 E F0 .763 (is enabled, the match is performed without re)3.263 F -.05(ga)-.15 G .764(rd to the case of alphabetic characters.).05 F .039 (When a pattern is used for pathname e)108 573.6 R .039 (xpansion, the character)-.15 F F4 -.63(``)2.539 G -.55(.').63 G(')-.08 E F0 .039(at the start of a name or immediately fol-)5.039 F(lo)108 585.6 Q .81(wing a slash must be matched e)-.25 F(xplicitly)-.15 E 3.31 (,u)-.65 G .81(nless the shell option)-3.31 F F4(dotglob)3.31 E F0 .81 (is set.)3.31 F .81(The \214lenames)5.81 F F4 -.63(``)3.31 G -.55(.').63 G(')-.08 E F0(and)5.81 E F4 -.63(``)108 597.6 S(..).63 E -.63('')-.55 G F0 1.182(must al)6.812 F -.1(wa)-.1 G 1.182(ys be matched e).1 F (xplicitly)-.15 E 3.682(,e)-.65 G -.15(ve)-3.932 G 3.682(ni).15 G(f) -3.682 E F4(dotglob)3.682 E F0 1.182(is set.)3.682 F 1.181 (In other cases, the)6.182 F F4 -.63(``)3.681 G -.55(.').63 G(')-.08 E F0 1.181(character is not)6.181 F .613(treated specially)108 609.6 R 5.613(.W)-.65 G .613 (hen matching a pathname, the slash character must al)-5.613 F -.1(wa) -.1 G .614(ys be matched e).1 F .614(xplicitly by a)-.15 F .655 (slash in the pattern, b)108 621.6 R .655(ut in other matching conte)-.2 F .655(xts it can be matched by a special pattern character as de-)-.15 F .719(scribed belo)108 633.6 R 3.219(wu)-.25 G(nder)-3.219 E F1 -.09 (Pa)3.219 G(tter).09 E 2.969(nM)-.135 G(atching)-2.969 E F2(.)A F0 .719 (See the description of)5.219 F F4(shopt)3.219 E F0(belo)3.219 E 3.22 (wu)-.25 G(nder)-3.22 E F1 .72(SHELL B)3.22 F(UIL)-.09 E .72(TIN COM-) -.828 F(MANDS)108 645.6 Q F0(for a description of the)2.25 E F4 (nocaseglob)2.5 E F0(,)A F4(nullglob)2.5 E F0(,)A F4(failglob)2.5 E F0 2.5(,a)C(nd)-2.5 E F4(dotglob)2.5 E F0(shell options.)2.5 E(The)108 662.4 Q F1(GLOBIGNORE)2.562 E F0 .062(shell v)2.312 F .061 (ariable may be used to restrict the set of \214le names matching a)-.25 F F3(pattern)3.811 E F0 5.061(.I).24 G(f)-5.061 E F1(GLO-)2.561 E (BIGNORE)108 674.4 Q F0 1.096(is set, each matching \214le name that al\ so matches one of the patterns in)3.346 F F1(GLOBIGNORE)3.597 E F0 1.097 (is re-)3.347 F(mo)108 686.4 Q -.15(ve)-.15 G 2.851(df).15 G .351 (rom the list of matches.)-2.851 F .351(If the)5.351 F F4(nocaseglob) 2.851 E F0 .351(option is set, the matching ag)2.851 F .351 (ainst the patterns in)-.05 F F1(GLO-)2.85 E(BIGNORE)108 698.4 Q F0 1.48 (is performed without re)3.73 F -.05(ga)-.15 G 1.48(rd to case.).05 F 1.48(The \214lenames)6.48 F F4 -.63(``)3.98 G -.55(.').63 G(')-.08 E F0 (and)6.48 E F4 -.63(``)3.98 G(..).63 E -.63('')-.55 G F0 1.481(are al) 7.11 F -.1(wa)-.1 G 1.481(ys ignored when).1 F F1(GLOBIGNORE)108 710.4 Q F0 .827(is set and not null.)3.077 F(Ho)5.827 E(we)-.25 E -.15(ve)-.25 G 1.627 -.4(r, s).15 H(etting).4 E F1(GLOBIGNORE)3.327 E F0 .827 (to a non-null v)3.077 F .827(alue has the ef)-.25 F .827(fect of)-.25 F .682(enabling the)108 722.4 R F4(dotglob)3.182 E F0 .682 (shell option, so all other \214lenames be)3.182 F .682(ginning with a) -.15 F F4 -.63(``)3.182 G -.55(.').63 G(')-.08 E F0 .682(will match.) 5.682 F 2.283 -.8(To g)5.683 H .683(et the old).8 F(GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(26)190.395 E 0 Cg EP %%Page: 27 27 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E(beha)108 84 Q 1.185(vior of ignoring \214lenames be)-.2 F 1.185(ginning with a)-.15 F /F1 10/Times-Bold@0 SF -.63(``)3.684 G -.55(.').63 G(')-.08 E F0 3.684 (,m)C(ak)-3.684 E(e)-.1 E F1 -.63(``)3.684 G(.*').63 E(')-.63 E F0 1.184 (one of the patterns in)6.184 F/F2 9/Times-Bold@0 SF(GLOBIGNORE)3.684 E /F3 9/Times-Roman@0 SF(.)A F0(The)108 96 Q F1(dotglob)3.131 E F0 .631 (option is disabled when)3.131 F F2(GLOBIGNORE)3.132 E F0 .632 (is unset.)2.882 F .632(The pattern matching honors the setting of)5.632 F(the)108 108 Q F1(extglob)2.5 E F0(shell option.)2.5 E F1 -.1(Pa)108 124.8 S(tter).1 E 2.5(nM)-.15 G(atching)-2.5 E F0(An)108 141.6 Q 3.138 (yc)-.15 G .638(haracter that appears in a pattern, other than the spec\ ial pattern characters described belo)-3.138 F 1.938 -.65(w, m)-.25 H (atches).65 E 2.721(itself. The)108 153.6 R .221 (NUL character may not occur in a pattern.)2.721 F 2.721(Ab)5.221 G .221 (ackslash escapes the follo)-2.721 F .222(wing character; the es-)-.25 F .418(caping backslash is discarded when matching.)108 165.6 R .418 (The special pattern characters must be quoted if the)5.418 F 2.918(ya) -.15 G .418(re to)-2.918 F(be matched literally)108 177.6 Q(.)-.65 E (The special pattern characters ha)108 194.4 Q .3 -.15(ve t)-.2 H (he follo).15 E(wing meanings:)-.25 E F1(*)144 211.2 Q F0 .376 (Matches an)180 211.2 R 2.876(ys)-.15 G .376 (tring, including the null string.)-2.876 F .376(When the)5.376 F F1 (globstar)2.876 E F0 .377(shell option is enabled,)2.876 F(and)180 223.2 Q F1(*)3.275 E F0 .775(is used in a pathname e)3.275 F .775 (xpansion conte)-.15 F .775(xt, tw)-.15 F 3.275(oa)-.1 G(djacent)-3.275 E F1(*)3.275 E F0 3.275(su)C .775(sed as a single pattern)-3.275 F 1.058 (will match all \214les and zero or more directories and subdirectories\ .)180 235.2 R 1.058(If follo)6.058 F 1.058(wed by a)-.25 F F1(/)3.558 E F0(,)A(tw)180 247.2 Q 2.5(oa)-.1 G(djacent)-2.5 E F1(*)2.5 E F0 2.5(sw)C (ill match only directories and subdirectories.)-2.5 E F1(?)144 259.2 Q F0(Matches an)180 259.2 Q 2.5(ys)-.15 G(ingle character)-2.5 E(.)-.55 E F1([...])144 271.2 Q F0 .579(Matches an)180 271.2 R 3.079(yo)-.15 G .579 (ne of the enclosed characters.)-3.079 F 3.079(Ap)5.579 G .578 (air of characters separated by a h)-3.079 F(yphen)-.05 E .684 (denotes a)180 283.2 R/F4 10/Times-Italic@0 SF -.15(ra)3.184 G(ng).15 E 3.184(ee)-.1 G(xpr)-3.384 E(ession)-.37 E F0 3.184(;a)C .984 -.15(ny c) -3.184 H .684(haracter that f).15 F .684(alls between those tw)-.1 F 3.185(oc)-.1 G .685(haracters, inclu-)-3.185 F(si)180 295.2 Q -.15(ve) -.25 G 3.713(,u).15 G 1.213(sing the current locale')-3.713 F 3.712(sc) -.55 G 1.212(ollating sequence and character set, is matched.)-3.712 F 1.212(If the)6.212 F 1.123(\214rst character follo)180 307.2 R 1.123 (wing the)-.25 F F1([)3.623 E F0 1.123(is a)3.623 F F1(!)3.623 E F0 1.124(or a)6.123 F F1(^)3.624 E F0 1.124(then an)3.624 F 3.624(yc)-.15 G 1.124(haracter not enclosed is matched.)-3.624 F .895 (The sorting order of characters in range e)180 319.2 R .894 (xpressions is determined by the current locale)-.15 F .375(and the v) 180 331.2 R .375(alues of the)-.25 F F2(LC_COLLA)2.875 E(TE)-.855 E F0 (or)2.625 E F2(LC_ALL)2.875 E F0 .375(shell v)2.625 F .375 (ariables, if set.)-.25 F 1.976 -.8(To o)5.376 H .376(btain the tra-).8 F .068(ditional interpretation of range e)180 343.2 R .068 (xpressions, where)-.15 F F1([a\255d])2.568 E F0 .067(is equi)2.567 F -.25(va)-.25 G .067(lent to).25 F F1([abcd])2.567 E F0 2.567(,s)C .067 (et v)-2.567 F(alue)-.25 E .156(of the)180 355.2 R F1(LC_ALL)2.656 E F0 .156(shell v)2.656 F .156(ariable to)-.25 F F1(C)2.657 E F0 2.657(,o)C 2.657(re)-2.657 G .157(nable the)-2.657 F F1(globasciiranges)2.657 E F0 .157(shell option.)2.657 F(A)5.157 E F12.657 E F0(may)2.657 E .193(\ be matched by including it as the \214rst or last character in the set.) 180 367.2 R(A)5.193 E F1(])2.693 E F0 .193(may be matched by)2.693 F (including it as the \214rst character in the set.)180 379.2 Q -.4(Wi) 180 397.2 S(thin).4 E F1([)3.07 E F0(and)3.07 E F1(])3.07 E F0(,)A F4 -.15(ch)3.07 G(ar).15 E .571(acter classes)-.15 F F0 .571 (can be speci\214ed using the syntax)3.071 F F1([:)3.071 E F4(class)A F1 (:])A F0 3.071(,w)C(here)-3.071 E F4(class)3.071 E F0 (is one of the follo)180 409.2 Q (wing classes de\214ned in the POSIX standard:)-.25 E F1 5.889 (alnum alpha ascii blank cntrl digit graph lo)180 421.2 R 5.889 (wer print punct space up-)-.1 F 5(per w)180 433.2 R 5(ord xdigit)-.1 F F0 4.289(Ac)180 445.2 S 1.789(haracter class matches an)-4.289 F 4.289 (yc)-.15 G 1.789(haracter belonging to that class.)-4.289 F(The)6.789 E F1 -.1(wo)4.29 G(rd).1 E F0(character)4.29 E (class matches letters, digits, and the character _.)180 457.2 Q -.4(Wi) 180 475.2 S(thin).4 E F1([)4.537 E F0(and)4.537 E F1(])4.537 E F0 4.537 (,a)C(n)-4.537 E F4 2.037(equivalence class)4.537 F F0 2.036 (can be speci\214ed using the syntax)4.536 F F1([=)4.536 E F4(c)A F1(=]) A F0 4.536(,w)C(hich)-4.536 E .125(matches all characters with the same\ collation weight \(as de\214ned by the current locale\) as)180 487.2 R (the character)180 499.2 Q F4(c)2.5 E F0(.)A -.4(Wi)180 517.2 S(thin).4 E F1([)2.5 E F0(and)2.5 E F1(])2.5 E F0 2.5(,t)C(he syntax)-2.5 E F1([.) 2.5 E F4(symbol)A F1(.])A F0(matches the collating symbol)2.5 E F4 (symbol)2.5 E F0(.)A .705(If the)108 534 R F1(extglob)3.205 E F0 .705 (shell option is enabled using the)3.205 F F1(shopt)3.205 E F0 -.2(bu) 3.205 G .704(iltin, se).2 F -.15(ve)-.25 G .704(ral e).15 F .704 (xtended pattern matching operators)-.15 F .255(are recognized.)108 546 R .255(In the follo)5.255 F .255(wing description, a)-.25 F F4 (pattern-list)2.755 E F0 .255 (is a list of one or more patterns separated by a)2.755 F F1(|)2.756 E F0(.)A(Composite patterns may be formed using one or more of the follo) 108 558 Q(wing sub-patterns:)-.25 E F1(?\()144 582 Q F4(pattern-list) .833 E F1(\)).833 E F0(Matches zero or one occurrence of the gi)180 594 Q -.15(ve)-.25 G 2.5(np).15 G(atterns)-2.5 E F1(*\()144 606 Q F4 (pattern-list).833 E F1(\)).833 E F0 (Matches zero or more occurrences of the gi)180 618 Q -.15(ve)-.25 G 2.5 (np).15 G(atterns)-2.5 E F1(+\()144 630 Q F4(pattern-list).833 E F1(\)) .833 E F0(Matches one or more occurrences of the gi)180 642 Q -.15(ve) -.25 G 2.5(np).15 G(atterns)-2.5 E F1(@\()144 654 Q F4(pattern-list).833 E F1(\)).833 E F0(Matches one of the gi)180 666 Q -.15(ve)-.25 G 2.5(np) .15 G(atterns)-2.5 E F1(!\()144 678 Q F4(pattern-list).833 E F1(\)).833 E F0(Matches an)180 690 Q(ything e)-.15 E(xcept one of the gi)-.15 E -.15(ve)-.25 G 2.5(np).15 G(atterns)-2.5 E .969(Complicated e)108 706.8 R .969(xtended pattern matching ag)-.15 F .969 (ainst long strings is slo)-.05 F 2.268 -.65(w, e)-.25 H .968 (specially when the patterns contain).65 F .09 (alternations and the strings contain multiple matches.)108 718.8 R .091 (Using separate matches ag)5.091 F .091(ainst shorter strings, or us-) -.05 F(ing arrays of strings instead of a single long string, may be f) 108 730.8 Q(aster)-.1 E(.)-.55 E(GNU Bash 5.1)72 768 Q(2020 October 29) 141.235 E(27)190.395 E 0 Cg EP %%Page: 28 28 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10/Times-Bold@0 SF(Quote Remo)87 84 Q -.1(va)-.1 G(l).1 E F0 1.113 (After the preceding e)108 96 R 1.113 (xpansions, all unquoted occurrences of the characters)-.15 F F1(\\) 3.613 E F0(,)A F1<08>3.612 E F0 3.612(,a)C(nd)-3.612 E F1(")4.445 E F0 1.112(that did not result)4.445 F(from one of the abo)108 108 Q .3 -.15 (ve ex)-.15 H(pansions are remo).15 E -.15(ve)-.15 G(d.).15 E/F2 10.95 /Times-Bold@0 SF(REDIRECTION)72 124.8 Q F0 .545(Before a command is e) 108 136.8 R -.15(xe)-.15 G .545(cuted, its input and output may be).15 F /F3 10/Times-Italic@0 SF -.37(re)3.045 G(dir).37 E(ected)-.37 E F0 .545 (using a special notation interpreted)3.815 F .405(by the shell.)108 148.8 R .405(Redirection allo)5.405 F .405(ws commands' \214le handles \ to be duplicated, opened, closed, made to refer to)-.25 F(dif)108 160.8 Q 1.019(ferent \214les, and can change the \214les the command reads fr\ om and writes to.)-.25 F 1.02(Redirection may also be)6.02 F .215 (used to modify \214le handles in the current shell e)108 172.8 R -.15 (xe)-.15 G .215(cution en).15 F 2.715(vironment. The)-.4 F(follo)2.715 E .215(wing redirection operators)-.25 F .862(may precede or appear an)108 184.8 R .862(ywhere within a)-.15 F F3 .862(simple command)3.702 F F0 .862(or may follo)4.132 F 3.362(wa)-.25 G F3(command).2 E F0 5.862(.R) .77 G .862(edirections are)-5.862 F(processed in the order the)108 196.8 Q 2.5(ya)-.15 G(ppear)-2.5 E 2.5(,f)-.4 G(rom left to right.)-2.5 E .771 (Each redirection that may be preceded by a \214le descriptor number ma\ y instead be preceded by a w)108 213.6 R .771(ord of)-.1 F .292 (the form {)108 225.6 R F3(varname)A F0 2.793(}. In)B .293 (this case, for each redirection operator e)2.793 F .293 (xcept >&- and <&-, the shell will allocate)-.15 F 3.18<618c>108 237.6 S .679(le descriptor greater than or equal to 10 and assign it to)-3.18 F F3(varname)3.179 E F0 5.679(.I)C 3.179(f>)-5.679 G .679 (&- or <&- is preceded by {)-3.179 F F3(var)A(-)-.2 E(name)108 249.6 Q F0 .599(}, the v)B .599(alue of)-.25 F F3(varname)3.099 E F0 .599 (de\214nes the \214le descriptor to close.)3.099 F .6(If {)5.6 F F3 (varname)A F0 3.1(}i)C 3.1(ss)-3.1 G .6(upplied, the redirection)-3.1 F 1.238(persists be)108 261.6 R 1.238(yond the scope of the command, allo) -.15 F 1.238(wing the shell programmer to manage the \214le descriptor) -.25 F(himself.)108 273.6 Q .283(In the follo)108 290.4 R .284(wing des\ criptions, if the \214le descriptor number is omitted, and the \214rst \ character of the redirect-)-.25 F .513(ion operator is)108 302.4 R F1(<) 3.012 E F0 3.012(,t)C .512 (he redirection refers to the standard input \(\214le descriptor 0\).) -3.012 F .512(If the \214rst character of the)5.512 F (redirection operator is)108 314.4 Q F1(>)2.5 E F0 2.5(,t)C (he redirection refers to the standard output \(\214le descriptor 1\).) -2.5 E .824(The w)108 331.2 R .824(ord follo)-.1 F .824 (wing the redirection operator in the follo)-.25 F .825 (wing descriptions, unless otherwise noted, is sub-)-.25 F .463 (jected to brace e)108 343.2 R .463(xpansion, tilde e)-.15 F .462 (xpansion, parameter and v)-.15 F .462(ariable e)-.25 F .462 (xpansion, command substitution, arith-)-.15 F .866(metic e)108 355.2 R .866(xpansion, quote remo)-.15 F -.25(va)-.15 G .866(l, pathname e).25 F .867(xpansion, and w)-.15 F .867(ord splitting.)-.1 F .867(If it e)5.867 F .867(xpands to more than one)-.15 F -.1(wo)108 367.2 S(rd,).1 E F1 (bash)2.5 E F0(reports an error)2.5 E(.)-.55 E (Note that the order of redirections is signi\214cant.)108 384 Q -.15 (Fo)5 G 2.5(re).15 G(xample, the command)-2.65 E(ls)144 400.8 Q F1(>)2.5 E F0(dirlist 2)2.5 E F1(>&)A F0(1)A (directs both standard output and standard error to the \214le)108 417.6 Q F3(dirlist)2.85 E F0 2.5(,w).68 G(hile the command)-2.5 E(ls 2)144 434.4 Q F1(>&)A F0(1)A F1(>)2.5 E F0(dirlist)2.5 E .505 (directs only the standard output to \214le)108 451.2 R F3(dirlist)3.355 E F0 3.005(,b).68 G .505(ecause the standard error w)-3.005 F .505 (as duplicated from the standard)-.1 F (output before the standard output w)108 463.2 Q(as redirected to)-.1 E F3(dirlist)2.85 E F0(.).68 E F1(Bash)108 480 Q F0 .598(handles se)3.098 F -.15(ve)-.25 G .598(ral \214lenames specially when the).15 F 3.099(ya) -.15 G .599(re used in redirections, as described in the follo)-3.099 F (wing)-.25 E 3.478(table. If)108 492 R .978 (the operating system on which)3.478 F F1(bash)3.478 E F0 .978 (is running pro)3.478 F .977 (vides these special \214les, bash will use them;)-.15 F (otherwise it will emulate them internally with the beha)108 504 Q (vior described belo)-.2 E -.65(w.)-.25 G F1(/de)144 520.8 Q(v/fd/)-.15 E F3(fd)A F0(If)180 532.8 Q F3(fd)2.5 E F0(is a v)2.5 E(alid inte)-.25 E (ger)-.15 E 2.5<2c8c>-.4 G(le descriptor)-2.5 E F3(fd)2.5 E F0 (is duplicated.)2.5 E F1(/de)144 544.8 Q(v/stdin)-.15 E F0 (File descriptor 0 is duplicated.)180 556.8 Q F1(/de)144 568.8 Q (v/stdout)-.15 E F0(File descriptor 1 is duplicated.)180 580.8 Q F1(/de) 144 592.8 Q(v/stderr)-.15 E F0(File descriptor 2 is duplicated.)180 604.8 Q F1(/de)144 616.8 Q(v/tcp/)-.15 E F3(host)A F1(/)A F3(port)A F0 (If)180 628.8 Q F3(host)2.996 E F0 .496(is a v)2.996 F .496 (alid hostname or Internet address, and)-.25 F F3(port)2.997 E F0 .497 (is an inte)2.997 F .497(ger port number or ser)-.15 F(-)-.2 E (vice name,)180 640.8 Q F1(bash)2.5 E F0 (attempts to open the corresponding TCP sock)2.5 E(et.)-.1 E F1(/de)144 652.8 Q(v/udp/)-.15 E F3(host)A F1(/)A F3(port)A F0(If)180 664.8 Q F3 (host)2.997 E F0 .497(is a v)2.997 F .497 (alid hostname or Internet address, and)-.25 F F3(port)2.996 E F0 .496 (is an inte)2.996 F .496(ger port number or ser)-.15 F(-)-.2 E (vice name,)180 676.8 Q F1(bash)2.5 E F0 (attempts to open the corresponding UDP sock)2.5 E(et.)-.1 E 2.5(Af)108 693.6 S(ailure to open or create a \214le causes the redirection to f) -2.6 E(ail.)-.1 E .045(Redirections using \214le descriptors greater th\ an 9 should be used with care, as the)108 710.4 R 2.546(ym)-.15 G .046 (ay con\215ict with \214le de-)-2.546 F (scriptors the shell uses internally)108 722.4 Q(.)-.65 E(GNU Bash 5.1) 72 768 Q(2020 October 29)141.235 E(28)190.395 E 0 Cg EP %%Page: 29 29 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10/Times-Bold@0 SF(Redir)87 84 Q(ecting Input)-.18 E F0 .391 (Redirection of input causes the \214le whose name results from the e) 108 96 R .391(xpansion of)-.15 F/F2 10/Times-Italic@0 SF(wor)3.231 E(d) -.37 E F0 .391(to be opened for read-)3.661 F(ing on \214le descriptor) 108 108 Q F2(n)2.86 E F0 2.5(,o).24 G 2.5(rt)-2.5 G (he standard input \(\214le descriptor 0\) if)-2.5 E F2(n)2.86 E F0 (is not speci\214ed.)2.74 E (The general format for redirecting input is:)108 124.8 Q([)144 141.6 Q F2(n)A F0(])A F1(<)A F2(wor)A(d)-.37 E F1(Redir)87 158.4 Q (ecting Output)-.18 E F0 .174 (Redirection of output causes the \214le whose name results from the e) 108 170.4 R .175(xpansion of)-.15 F F2(wor)3.015 E(d)-.37 E F0 .175 (to be opened for writ-)3.445 F .084(ing on \214le descriptor)108 182.4 R F2(n)2.944 E F0 2.583(,o).24 G 2.583(rt)-2.583 G .083 (he standard output \(\214le descriptor 1\) if)-2.583 F F2(n)2.943 E F0 .083(is not speci\214ed.)2.823 F .083(If the \214le does not e)5.083 F (x-)-.15 E(ist it is created; if it does e)108 194.4 Q (xist it is truncated to zero size.)-.15 E (The general format for redirecting output is:)108 211.2 Q([)144 228 Q F2(n)A F0(])A F1(>)A F2(wor)A(d)-.37 E F0 .154 (If the redirection operator is)108 244.8 R F1(>)2.654 E F0 2.654(,a)C .154(nd the)-2.654 F F1(noclob)2.654 E(ber)-.1 E F0 .154(option to the) 2.654 F F1(set)2.655 E F0 -.2(bu)2.655 G .155 (iltin has been enabled, the redirection).2 F .658(will f)108 256.8 R .658(ail if the \214le whose name results from the e)-.1 F .658 (xpansion of)-.15 F F2(wor)3.158 E(d)-.37 E F0 -.15(ex)3.158 G .657 (ists and is a re).15 F .657(gular \214le.)-.15 F .657(If the redi-) 5.657 F .408(rection operator is)108 268.8 R F1(>|)2.909 E F0 2.909(,o)C 2.909(rt)-2.909 G .409(he redirection operator is)-2.909 F F1(>)2.909 E F0 .409(and the)2.909 F F1(noclob)2.909 E(ber)-.1 E F0 .409 (option to the)2.909 F F1(set)2.909 E F0 -.2(bu)2.909 G .409 (iltin command).2 F(is not enabled, the redirection is attempted e)108 280.8 Q -.15(ve)-.25 G 2.5(ni).15 G 2.5(ft)-2.5 G(he \214le named by) -2.5 E F2(wor)2.5 E(d)-.37 E F0 -.15(ex)2.5 G(ists.).15 E F1 -.25(Ap)87 297.6 S(pending Redir).25 E(ected Output)-.18 E F0 .642 (Redirection of output in this f)108 309.6 R .642 (ashion causes the \214le whose name results from the e)-.1 F .641 (xpansion of)-.15 F F2(wor)3.481 E(d)-.37 E F0 .641(to be)3.911 F .454 (opened for appending on \214le descriptor)108 321.6 R F2(n)3.315 E F0 2.955(,o).24 G 2.955(rt)-2.955 G .455 (he standard output \(\214le descriptor 1\) if)-2.955 F F2(n)3.315 E F0 .455(is not speci\214ed.)3.195 F(If)5.455 E(the \214le does not e)108 333.6 Q(xist it is created.)-.15 E (The general format for appending output is:)108 350.4 Q([)144 367.2 Q F2(n)A F0(])A F1(>>)A F2(wor)A(d)-.37 E F1(Redir)87 384 Q (ecting Standard Output and Standard Err)-.18 E(or)-.18 E F0 .249 (This construct allo)108 396 R .249(ws both the standard output \(\214l\ e descriptor 1\) and the standard error output \(\214le descrip-)-.25 F (tor 2\) to be redirected to the \214le whose name is the e)108 408 Q (xpansion of)-.15 E F2(wor)2.84 E(d)-.37 E F0(.).77 E(There are tw)108 424.8 Q 2.5(of)-.1 G (ormats for redirecting standard output and standard error:)-2.5 E F1 (&>)144 441.6 Q F2(wor)A(d)-.37 E F0(and)108 453.6 Q F1(>&)144 465.6 Q F2(wor)A(d)-.37 E F0(Of the tw)108 482.4 Q 2.5(of)-.1 G (orms, the \214rst is preferred.)-2.5 E(This is semantically equi)5 E -.25(va)-.25 G(lent to).25 E F1(>)144 499.2 Q F2(wor)A(d)-.37 E F0(2)2.5 E F1(>&)A F0(1)A .114(When using the second form,)108 516 R F2(wor)2.614 E(d)-.37 E F0 .114(may not e)2.614 F .114(xpand to a number or)-.15 F F1 2.614 E F0 5.114(.I)C 2.614(fi)-5.114 G 2.615(td)-2.614 G .115 (oes, other redirection operators)-2.615 F(apply \(see)108 528 Q F1 (Duplicating File Descriptors)2.5 E F0(belo)2.5 E (w\) for compatibility reasons.)-.25 E F1 -.25(Ap)87 544.8 S (pending Standard Output and Standard Err).25 E(or)-.18 E F0 .249 (This construct allo)108 556.8 R .249(ws both the standard output \(\ \214le descriptor 1\) and the standard error output \(\214le descrip-) -.25 F(tor 2\) to be appended to the \214le whose name is the e)108 568.8 Q(xpansion of)-.15 E F2(wor)2.84 E(d)-.37 E F0(.).77 E (The format for appending standard output and standard error is:)108 585.6 Q F1(&>>)144 602.4 Q F2(wor)A(d)-.37 E F0 (This is semantically equi)108 619.2 Q -.25(va)-.25 G(lent to).25 E F1 (>>)144 636 Q F2(wor)A(d)-.37 E F0(2)2.5 E F1(>&)A F0(1)A(\(see)108 652.8 Q F1(Duplicating File Descriptors)2.5 E F0(belo)2.5 E(w\).)-.25 E F1(Her)87 669.6 Q 2.5(eD)-.18 G(ocuments)-2.5 E F0 .33(This type of red\ irection instructs the shell to read input from the current source unti\ l a line containing only)108 681.6 R F2(delimiter)108.35 693.6 Q F0 .615 (\(with no trailing blanks\) is seen.)3.845 F .615 (All of the lines read up to that point are then used as the stan-)5.615 F(dard input \(or \214le descriptor)108 705.6 Q F2(n)2.5 E F0(if)2.5 E F2(n)2.5 E F0(is speci\214ed\) for a command.)2.5 E (The format of here-documents is:)108 722.4 Q(GNU Bash 5.1)72 768 Q (2020 October 29)141.235 E(29)190.395 E 0 Cg EP %%Page: 30 30 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E([)144 84 Q/F1 10 /Times-Italic@0 SF(n)A F0(])A/F2 10/Times-Bold@0 SF(<<)A F0([)A F2A F0(])A F1(wor)A(d)-.37 E(her)164 96 Q(e-document)-.37 E(delimiter)144 108 Q F0 .301(No parameter and v)108 124.8 R .302(ariable e)-.25 F .302 (xpansion, command substitution, arithmetic e)-.15 F .302 (xpansion, or pathname e)-.15 F(xpansion)-.15 E .381(is performed on)108 136.8 R F1(wor)3.221 E(d)-.37 E F0 5.381(.I).77 G 2.881(fa)-5.381 G .681 -.15(ny p)-2.881 H .381(art of).15 F F1(wor)3.221 E(d)-.37 E F0 .381 (is quoted, the)3.651 F F1(delimiter)3.231 E F0 .381 (is the result of quote remo)3.611 F -.25(va)-.15 G 2.881(lo).25 G(n) -2.881 E F1(wor)3.221 E(d)-.37 E F0(,).77 E .773 (and the lines in the here-document are not e)108 148.8 R 3.274 (xpanded. If)-.15 F F1(wor)3.274 E(d)-.37 E F0 .774 (is unquoted, all lines of the here-document)3.274 F 1.195 (are subjected to parameter e)108 160.8 R 1.194 (xpansion, command substitution, and arithmetic e)-.15 F 1.194 (xpansion, the character se-)-.15 F(quence)108 172.8 Q F2(\\) 2.5 E F0(is ignored, and)2.5 E F2(\\)2.5 E F0 (must be used to quote the characters)2.5 E F2(\\)2.5 E F0(,)A F2($)2.5 E F0 2.5(,a)C(nd)-2.5 E F2<92>2.5 E F0(.)A .601 (If the redirection operator is)108 189.6 R F2(<<\255)3.101 E F0 3.101 (,t)C .601(hen all leading tab characters are stripped from input lines\ and the line)-3.101 F(containing)108 201.6 Q F1(delimiter)2.85 E F0 5 (.T).73 G(his allo)-5 E (ws here-documents within shell scripts to be indented in a natural f) -.25 E(ashion.)-.1 E F2(Her)87 218.4 Q 2.5(eS)-.18 G(trings)-2.5 E F0 2.5(Av)108 230.4 S(ariant of here documents, the format is:)-2.75 E([) 144 247.2 Q F1(n)A F0(])A F2(<<<)A F1(wor)A(d)-.37 E F0(The)108 264 Q F1 (wor)3.292 E(d)-.37 E F0(under)3.292 E .792(goes tilde e)-.18 F .792 (xpansion, parameter and v)-.15 F .792(ariable e)-.25 F .791 (xpansion, command substitution, arithmetic)-.15 F -.15(ex)108 276 S 1.187(pansion, and quote remo).15 F -.25(va)-.15 G 3.687(l. P).25 F 1.187(athname e)-.15 F 1.187(xpansion and w)-.15 F 1.187 (ord splitting are not performed.)-.1 F 1.188(The result is)6.187 F .375 (supplied as a single string, with a ne)108 288 R .374(wline appended, \ to the command on its standard input \(or \214le descrip-)-.25 F(tor)108 300 Q F1(n)2.5 E F0(if)2.5 E F1(n)2.5 E F0(is speci\214ed\).)2.5 E F2 (Duplicating File Descriptors)87 316.8 Q F0(The redirection operator)108 328.8 Q([)144 345.6 Q F1(n)A F0(])A F2(<&)A F1(wor)A(d)-.37 E F0 .126 (is used to duplicate input \214le descriptors.)108 362.4 R(If)5.127 E F1(wor)2.967 E(d)-.37 E F0 -.15(ex)3.397 G .127 (pands to one or more digits, the \214le descriptor denoted).15 F(by)108 374.4 Q F1(n)3.318 E F0 .458(is made to be a cop)3.198 F 2.958(yo)-.1 G 2.958(ft)-2.958 G .457(hat \214le descriptor)-2.958 F 5.457(.I)-.55 G 2.957(ft)-5.457 G .457(he digits in)-2.957 F F1(wor)3.297 E(d)-.37 E F0 .457(do not specify a \214le descriptor open)3.727 F .149 (for input, a redirection error occurs.)108 386.4 R(If)5.149 E F1(wor) 2.989 E(d)-.37 E F0 -.25(eva)3.419 G .149(luates to).25 F F22.649 E F0 2.65<2c8c>C .15(le descriptor)-2.65 F F1(n)3.01 E F0 .15(is closed.) 2.89 F(If)5.15 E F1(n)3.01 E F0 .15(is not speci\214ed,)2.89 F (the standard input \(\214le descriptor 0\) is used.)108 398.4 Q (The operator)108 415.2 Q([)144 432 Q F1(n)A F0(])A F2(>&)A F1(wor)A(d) -.37 E F0 .444 (is used similarly to duplicate output \214le descriptors.)108 448.8 R (If)5.444 E F1(n)3.304 E F0 .443 (is not speci\214ed, the standard output \(\214le descrip-)3.183 F .565 (tor 1\) is used.)108 460.8 R .565(If the digits in)5.565 F F1(wor)3.406 E(d)-.37 E F0 .566(do not specify a \214le descriptor open for output, \ a redirection error oc-)3.836 F 3.204(curs. If)108 472.8 R F1(wor)3.544 E(d)-.37 E F0 -.25(eva)3.974 G .704(luates to).25 F F23.204 E F0 3.204<2c8c>C .704(le descriptor)-3.204 F F1(n)3.563 E F0 .703 (is closed.)3.443 F .703(As a special case, if)5.703 F F1(n)3.203 E F0 .703(is omitted, and)3.203 F F1(wor)3.203 E(d)-.37 E F0(does)3.203 E .965(not e)108 484.8 R .965(xpand to one or more digits or)-.15 F F2 3.465 E F0 3.466(,t)C .966 (he standard output and standard error are redirected as described) -3.466 F(pre)108 496.8 Q(viously)-.25 E(.)-.65 E F2(Mo)87 513.6 Q (ving File Descriptors)-.1 E F0(The redirection operator)108 525.6 Q([) 144 542.4 Q F1(n)A F0(])A F2(<&)A F1(digit)A F2A F0(mo)108 559.2 Q -.15(ve)-.15 G 3.018(st).15 G .518(he \214le descriptor)-3.018 F F1 (digit)3.018 E F0 .518(to \214le descriptor)3.018 F F1(n)3.378 E F0 3.018(,o).24 G 3.018(rt)-3.018 G .517 (he standard input \(\214le descriptor 0\) if)-3.018 F F1(n)3.017 E F0 .517(is not speci-)3.017 F(\214ed.)108 571.2 Q F1(digit)5 E F0 (is closed after being duplicated to)2.5 E F1(n)2.5 E F0(.)A(Similarly) 108 588 Q 2.5(,t)-.65 G(he redirection operator)-2.5 E([)144 604.8 Q F1 (n)A F0(])A F2(>&)A F1(digit)A F2A F0(mo)108 621.6 Q -.15(ve)-.15 G 2.767(st).15 G .267(he \214le descriptor)-2.767 F F1(digit)2.767 E F0 .267(to \214le descriptor)2.767 F F1(n)3.127 E F0 2.767(,o).24 G 2.767 (rt)-2.767 G .268(he standard output \(\214le descriptor 1\) if)-2.767 F F1(n)2.768 E F0 .268(is not speci-)2.768 F(\214ed.)108 633.6 Q F2 (Opening File Descriptors f)87 650.4 Q(or Reading and Writing)-.25 E F0 (The redirection operator)108 662.4 Q([)144 679.2 Q F1(n)A F0(])A F2(<>) A F1(wor)A(d)-.37 E F0 .518(causes the \214le whose name is the e)108 696 R .518(xpansion of)-.15 F F1(wor)3.358 E(d)-.37 E F0 .518 (to be opened for both reading and writing on \214le de-)3.788 F (scriptor)108 708 Q F1(n)2.86 E F0 2.5(,o).24 G 2.5(ro)-2.5 G 2.5<6e8c> -2.5 G(le descriptor 0 if)-2.5 E F1(n)2.86 E F0(is not speci\214ed.)2.74 E(If the \214le does not e)5 E(xist, it is created.)-.15 E(GNU Bash 5.1) 72 768 Q(2020 October 29)141.235 E(30)190.395 E 0 Cg EP %%Page: 31 31 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10.95 /Times-Bold@0 SF(ALIASES)72 84 Q/F2 10/Times-Italic@0 SF(Aliases)108 96 Q F0(allo)3.173 E 3.173(was)-.25 G .674(tring to be substituted for a w) -3.173 F .674(ord when it is used as the \214rst w)-.1 F .674 (ord of a simple command.)-.1 F .394(The shell maintains a list of alia\ ses that may be set and unset with the)108 108 R/F3 10/Times-Bold@0 SF (alias)2.893 E F0(and)2.893 E F3(unalias)2.893 E F0 -.2(bu)2.893 G .393 (iltin commands).2 F(\(see)108 120 Q/F4 9/Times-Bold@0 SF 1.979(SHELL B) 4.479 F(UIL)-.09 E 1.979(TIN COMMANDS)-.828 F F0(belo)4.229 E 4.48 (w\). The)-.25 F 1.98(\214rst w)4.48 F 1.98 (ord of each simple command, if unquoted, is)-.1 F(check)108 132 Q .473 (ed to see if it has an alias.)-.1 F .473(If so, that w)5.473 F .472 (ord is replaced by the te)-.1 F .472(xt of the alias.)-.15 F .472 (The characters)5.472 F F3(/)2.972 E F0(,)A F3($)2.972 E F0(,)A F3<92> 2.972 E F0(,)A(and)108 144 Q F3(=)3.611 E F0 1.111(and an)3.611 F 3.611 (yo)-.15 G 3.611(ft)-3.611 G 1.111(he shell)-3.611 F F2(metac)3.612 E (har)-.15 E(acter)-.15 E(s)-.1 E F0 1.112 (or quoting characters listed abo)3.612 F 1.412 -.15(ve m)-.15 H 1.112 (ay not appear in an alias).15 F 3.62(name. The)108 156 R 1.12 (replacement te)3.62 F 1.119(xt may contain an)-.15 F 3.619(yv)-.15 G 1.119(alid shell input, including shell metacharacters.)-3.869 F 1.119 (The \214rst)6.119 F -.1(wo)108 168 S .513(rd of the replacement te).1 F .513(xt is tested for aliases, b)-.15 F .513(ut a w)-.2 F .514 (ord that is identical to an alias being e)-.1 F .514(xpanded is)-.15 F .296(not e)108 180 R .296(xpanded a second time.)-.15 F .296 (This means that one may alias)5.296 F F3(ls)2.796 E F0(to)2.796 E F3 .296(ls \255F)2.796 F F0 2.796(,f)C .295(or instance, and)-2.796 F F3 (bash)2.795 E F0 .295(does not try)2.795 F .528(to recursi)108 192 R -.15(ve)-.25 G .528(ly e).15 F .528(xpand the replacement te)-.15 F 3.028(xt. If)-.15 F .528(the last character of the alias v)3.028 F .529 (alue is a)-.25 F F2(blank)3.299 E F0 3.029(,t).67 G .529(hen the ne) -3.029 F(xt)-.15 E(command w)108 204 Q(ord follo)-.1 E (wing the alias is also check)-.25 E(ed for alias e)-.1 E(xpansion.)-.15 E(Aliases are created and listed with the)108 220.8 Q F3(alias)2.5 E F0 (command, and remo)2.5 E -.15(ve)-.15 G 2.5(dw).15 G(ith the)-2.5 E F3 (unalias)2.5 E F0(command.)2.5 E .284 (There is no mechanism for using ar)108 237.6 R .284 (guments in the replacement te)-.18 F 2.784(xt. If)-.15 F(ar)2.784 E .284(guments are needed, a shell func-)-.18 F(tion should be used \(see) 108 249.6 Q F4(FUNCTIONS)2.5 E F0(belo)2.25 E(w\).)-.25 E .282 (Aliases are not e)108 266.4 R .282 (xpanded when the shell is not interacti)-.15 F -.15(ve)-.25 G 2.782(,u) .15 G .282(nless the)-2.782 F F3(expand_aliases)2.783 E F0 .283 (shell option is set us-)2.783 F(ing)108 278.4 Q F3(shopt)2.5 E F0 (\(see the description of)2.5 E F3(shopt)2.5 E F0(under)2.5 E F4 (SHELL B)2.5 E(UIL)-.09 E(TIN COMMANDS)-.828 E F0(belo)2.25 E(w\).)-.25 E .436 (The rules concerning the de\214nition and use of aliases are some)108 295.2 R .435(what confusing.)-.25 F F3(Bash)5.435 E F0(al)2.935 E -.1 (wa)-.1 G .435(ys reads at least).1 F .67 (one complete line of input, and all lines that mak)108 307.2 R 3.17(eu) -.1 G 3.17(pac)-3.17 G .67(ompound command, before e)-3.17 F -.15(xe) -.15 G .67(cuting an).15 F 3.17(yo)-.15 G 3.17(ft)-3.17 G(he)-3.17 E 1.059(commands on that line or the compound command.)108 319.2 R 1.059 (Aliases are e)6.059 F 1.058(xpanded when a command is read, not)-.15 F .074(when it is e)108 331.2 R -.15(xe)-.15 G 2.574(cuted. Therefore,).15 F .075(an alias de\214nition appearing on the same line as another comm\ and does not)2.574 F(tak)108 343.2 Q 2.838(ee)-.1 G -.25(ff)-2.838 G .338(ect until the ne).25 F .338(xt line of input is read.)-.15 F .337 (The commands follo)5.337 F .337 (wing the alias de\214nition on that line are)-.25 F .551(not af)108 355.2 R .551(fected by the ne)-.25 F 3.051(wa)-.25 G 3.051(lias. This) -3.051 F(beha)3.051 E .551(vior is also an issue when functions are e) -.2 F -.15(xe)-.15 G 3.051(cuted. Aliases).15 F .552(are e)3.052 F(x-) -.15 E .426(panded when a function de\214nition is read, not when the f\ unction is e)108 367.2 R -.15(xe)-.15 G .425 (cuted, because a function de\214nition).15 F .403(is itself a command.) 108 379.2 R .403 (As a consequence, aliases de\214ned in a function are not a)5.403 F -.25(va)-.2 G .404(ilable until after that func-).25 F .862(tion is e) 108 391.2 R -.15(xe)-.15 G 3.362(cuted. T).15 F 3.362(ob)-.8 G 3.362(es) -3.362 G .862(afe, al)-3.362 F -.1(wa)-.1 G .862 (ys put alias de\214nitions on a separate line, and do not use).1 F F3 (alias)3.362 E F0 .862(in com-)3.362 F(pound commands.)108 403.2 Q -.15 (Fo)108 420 S 2.5(ra).15 G(lmost e)-2.5 E -.15(ve)-.25 G (ry purpose, aliases are superseded by shell functions.).15 E F1 (FUNCTIONS)72 436.8 Q F0 3.467(As)108 448.8 S .967 (hell function, de\214ned as described abo)-3.467 F 1.267 -.15(ve u)-.15 H(nder).15 E F4 .967(SHELL GRAMMAR)3.467 F/F5 9/Times-Roman@0 SF(,)A F0 .968(stores a series of commands for)3.217 F 1.002(later e)108 460.8 R -.15(xe)-.15 G 3.502(cution. When).15 F 1.002(the name of a shell funct\ ion is used as a simple command name, the list of com-)3.502 F .315 (mands associated with that function name is e)108 472.8 R -.15(xe)-.15 G 2.816(cuted. Functions).15 F .316(are e)2.816 F -.15(xe)-.15 G .316 (cuted in the conte).15 F .316(xt of the current)-.15 F .036 (shell; no ne)108 484.8 R 2.536(wp)-.25 G .036 (rocess is created to interpret them \(contrast this with the e)-2.536 F -.15(xe)-.15 G .036(cution of a shell script\).).15 F .035(When a)5.035 F .639(function is e)108 496.8 R -.15(xe)-.15 G .639(cuted, the ar).15 F .639 (guments to the function become the positional parameters during its e) -.18 F -.15(xe)-.15 G(cution.).15 E .533(The special parameter)108 508.8 R F3(#)3.033 E F0 .532(is updated to re\215ect the change.)3.033 F .532 (Special parameter)5.532 F F3(0)3.032 E F0 .532(is unchanged.)3.032 F .532(The \214rst ele-)5.532 F(ment of the)108 520.8 Q F4(FUNCN)2.5 E (AME)-.18 E F0 -.25(va)2.25 G (riable is set to the name of the function while the function is e).25 E -.15(xe)-.15 G(cuting.).15 E 1.25(All other aspects of the shell e)108 537.6 R -.15(xe)-.15 G 1.25(cution en).15 F 1.25 (vironment are identical between a function and its caller with)-.4 F 1.215(these e)108 549.6 R 1.215(xceptions: the)-.15 F F4(DEB)3.715 E(UG) -.09 E F0(and)3.465 E F3(RETURN)3.715 E F0 1.215 (traps \(see the description of the)3.715 F F3(trap)3.714 E F0 -.2(bu) 3.714 G 1.214(iltin under).2 F F4(SHELL)3.714 E -.09(BU)108 561.6 S(IL) .09 E .478(TIN COMMANDS)-.828 F F0(belo)2.728 E .479 (w\) are not inherited unless the function has been gi)-.25 F -.15(ve) -.25 G 2.979(nt).15 G(he)-2.979 E F3(trace)2.979 E F0(attrib)2.979 E .479(ute \(see)-.2 F .421(the description of the)108 573.6 R F4(declar) 2.92 E(e)-.162 E F0 -.2(bu)2.67 G .42(iltin belo).2 F .42(w\) or the) -.25 F F3 .42(\255o functrace)2.92 F F0 .42 (shell option has been enabled with the)2.92 F F3(set)2.92 E F0 -.2(bu) 108 585.6 S .071(iltin \(in which case all functions inherit the).2 F F3 (DEB)2.572 E(UG)-.1 E F0(and)2.572 E F3(RETURN)2.572 E F0 .072 (traps\), and the)2.572 F F4(ERR)2.572 E F0 .072(trap is not inher)2.322 F(-)-.2 E(ited unless the)108 597.6 Q F3(\255o errtrace)2.5 E F0 (shell option has been enabled.)2.5 E -1.11(Va)108 614.4 S .656 (riables local to the function may be declared with the)1.11 F F3(local) 3.155 E F0 -.2(bu)3.155 G .655(iltin command.).2 F(Ordinarily)5.655 E 3.155(,v)-.65 G .655(ariables and)-3.405 F .05(their v)108 626.4 R .05 (alues are shared between the function and its caller)-.25 F 5.051(.I) -.55 G 2.551(fav)-5.051 G .051(ariable is declared)-2.801 F F3(local) 2.551 E F0 2.551(,t)C .051(he v)-2.551 F(ariable')-.25 E 2.551(sv)-.55 G (isi-)-2.551 E 1.186(ble scope is restricted to that function and its c\ hildren \(including the functions it calls\).)108 638.4 R 1.185(Local v) 6.185 F(ariables)-.25 E("shado)108 650.4 Q .154(w" v)-.25 F .154 (ariables with the same name declared at pre)-.25 F .155(vious scopes.) -.25 F -.15(Fo)5.155 G 2.655(ri).15 G .155(nstance, a local v)-2.655 F .155(ariable declared)-.25 F .67(in a function hides a global v)108 662.4 R .669(ariable of the same name: references and assignments refer\ to the local v)-.25 F(ari-)-.25 E .688(able, lea)108 674.4 R .688 (ving the global v)-.2 F .688(ariable unmodi\214ed.)-.25 F .688 (When the function returns, the global v)5.688 F .688 (ariable is once ag)-.25 F(ain)-.05 E(visible.)108 686.4 Q .727 (The shell uses)108 703.2 R F2 .727(dynamic scoping)3.227 F F0 .726 (to control a v)3.227 F(ariable')-.25 E 3.226(sv)-.55 G .726 (isibility within functions.)-3.226 F -.4(Wi)5.726 G .726 (th dynamic scoping,).4 F .007(visible v)108 715.2 R .007 (ariables and their v)-.25 F .007 (alues are a result of the sequence of function calls that caused e)-.25 F -.15(xe)-.15 G .008(cution to reach).15 F .814(the current function.) 108 727.2 R .813(The v)5.814 F .813(alue of a v)-.25 F .813 (ariable that a function sees depends on its v)-.25 F .813 (alue within its caller)-.25 F 3.313(,i)-.4 G(f)-3.313 E(GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(31)190.395 E 0 Cg EP %%Page: 32 32 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E(an)108 84 Q 2.116 -.65(y, w)-.15 H .816 (hether that caller is the "global" scope or another shell function.).65 F .817(This is also the v)5.816 F .817(alue that a local)-.25 F -.25(va) 108 96 S(riable declaration "shado).25 E(ws", and the v)-.25 E (alue that is restored when the function returns.)-.25 E -.15(Fo)108 112.8 S 2.724(re).15 G .224(xample, if a v)-2.874 F(ariable)-.25 E/F1 10 /Times-Italic@0 SF(var)2.724 E F0 .223(is declared as local in function) 2.724 F F1(func1)2.723 E F0 2.723(,a)C(nd)-2.723 E F1(func1)2.723 E F0 .223(calls another function)2.723 F F1(func2)2.723 E F0(,)A .463 (references to)108 124.8 R F1(var)2.963 E F0 .463(made from within)2.963 F F1(func2)2.963 E F0 .463(will resolv)2.963 F 2.964(et)-.15 G 2.964(ot) -2.964 G .464(he local v)-2.964 F(ariable)-.25 E F1(var)2.964 E F0(from) 2.964 E F1(func1)2.964 E F0 2.964(,s)C(hado)-2.964 E .464(wing an)-.25 F (y)-.15 E(global v)108 136.8 Q(ariable named)-.25 E F1(var)2.5 E F0(.)A (The)108 153.6 Q/F2 10/Times-Bold@0 SF(unset)2.983 E F0 -.2(bu)2.983 G .483(iltin also acts using the same dynamic scope: if a v).2 F .482 (ariable is local to the current scope,)-.25 F F2(unset)2.982 E F0 .19 (will unset it; otherwise the unset will refer to the v)108 165.6 R .19 (ariable found in an)-.25 F 2.69(yc)-.15 G .19 (alling scope as described abo)-2.69 F -.15(ve)-.15 G 5.19(.I).15 G(f) -5.19 E 2.721(av)108 177.6 S .221(ariable at the current local scope is\ unset, it will remain so until it is reset in that scope or until the \ func-)-2.971 F .013(tion returns.)108 189.6 R .013 (Once the function returns, an)5.013 F 2.513(yi)-.15 G .014 (nstance of the v)-2.513 F .014(ariable at a pre)-.25 F .014 (vious scope will become visible.)-.25 F .567(If the unset acts on a v) 108 201.6 R .566(ariable at a pre)-.25 F .566(vious scope, an)-.25 F 3.066(yi)-.15 G .566(nstance of a v)-3.066 F .566 (ariable with that name that had been)-.25 F(shado)108 213.6 Q (wed will become visible.)-.25 E(The)108 230.4 Q F2(FUNCNEST)3.528 E F0 -.25(va)3.528 G 1.028(riable, if set to a numeric v).25 F 1.028 (alue greater than 0, de\214nes a maximum function nesting)-.25 F(le)108 242.4 Q -.15(ve)-.25 G 2.5(l. Function).15 F(in)2.5 E -.2(vo)-.4 G (cations that e).2 E(xceed the limit cause the entire command to abort.) -.15 E .044(If the b)108 259.2 R .043(uiltin command)-.2 F F2 -.18(re) 2.543 G(tur).18 E(n)-.15 E F0 .043(is e)2.543 F -.15(xe)-.15 G .043 (cuted in a function, the function completes and e).15 F -.15(xe)-.15 G .043(cution resumes with).15 F 1.011(the ne)108 271.2 R 1.011 (xt command after the function call.)-.15 F(An)6.011 E 3.511(yc)-.15 G 1.011(ommand associated with the)-3.511 F F2(RETURN)3.512 E F0 1.012 (trap is e)3.512 F -.15(xe)-.15 G(cuted).15 E .214(before e)108 283.2 R -.15(xe)-.15 G .214(cution resumes.).15 F .213 (When a function completes, the v)5.214 F .213 (alues of the positional parameters and the spe-)-.25 F(cial parameter) 108 295.2 Q F2(#)2.5 E F0(are restored to the v)2.5 E(alues the)-.25 E 2.5(yh)-.15 G(ad prior to the function')-2.5 E 2.5(se)-.55 G -.15(xe) -2.65 G(cution.).15 E 1.358 (Function names and de\214nitions may be listed with the)108 312 R F2 3.858 E F0 1.358(option to the)3.858 F F2(declar)3.858 E(e)-.18 E F0(or)3.859 E F2(typeset)3.859 E F0 -.2(bu)3.859 G 1.359(iltin com-).2 F 3.39(mands. The)108 324 R F23.39 E F0 .89(option to)3.39 F F2 (declar)3.39 E(e)-.18 E F0(or)3.39 E F2(typeset)3.39 E F0 .89 (will list the function names only \(and optionally the source)3.39 F .326(\214le and line number)108 336 R 2.826(,i)-.4 G 2.826(ft)-2.826 G (he)-2.826 E F2(extdeb)2.826 E(ug)-.2 E F0 .326 (shell option is enabled\).)2.826 F .327(Functions may be e)5.327 F .327 (xported so that subshells)-.15 F 1.298(automatically ha)108 348 R 1.598 -.15(ve t)-.2 H 1.298(hem de\214ned with the).15 F F23.798 E F0 1.298(option to the)3.798 F F2(export)3.797 E F0 -.2(bu)3.797 G 3.797 (iltin. A).2 F 1.297(function de\214nition may be)3.797 F (deleted using the)108 360 Q F22.5 E F0(option to the)2.5 E F2 (unset)2.5 E F0 -.2(bu)2.5 G(iltin.).2 E .371(Functions may be recursi) 108 376.8 R -.15(ve)-.25 G 5.371(.T).15 G(he)-5.371 E F2(FUNCNEST)2.871 E F0 -.25(va)2.871 G .371 (riable may be used to limit the depth of the function call).25 F .323 (stack and restrict the number of function in)108 388.8 R -.2(vo)-.4 G 2.822(cations. By).2 F(def)2.822 E .322 (ault, no limit is imposed on the number of re-)-.1 F(cursi)108 400.8 Q .3 -.15(ve c)-.25 H(alls.).15 E/F3 10.95/Times-Bold@0 SF(ARITHMETIC EV) 72 417.6 Q(ALU)-1.478 E -1.04(AT)-.657 G(ION)1.04 E F0 1.088 (The shell allo)108 429.6 R 1.088(ws arithmetic e)-.25 F 1.089 (xpressions to be e)-.15 F -.25(va)-.25 G 1.089 (luated, under certain circumstances \(see the).25 F F2(let)3.589 E F0 (and)3.589 E F2(de-)3.589 E(clar)108 441.6 Q(e)-.18 E F0 -.2(bu)3.453 G .953(iltin commands, the).2 F F2(\(\()3.453 E F0 .952 (compound command, and)3.452 F F2 .952(Arithmetic Expansion)3.452 F F0 3.452(\). Ev)B .952(aluation is done in)-.25 F<8c78>108 453.6 Q 1.057 (ed-width inte)-.15 F 1.057(gers with no check for o)-.15 F -.15(ve)-.15 G(r\215o).15 E 2.357 -.65(w, t)-.25 H 1.057(hough di).65 F 1.057 (vision by 0 is trapped and \215agged as an error)-.25 F(.)-.55 E .829 (The operators and their precedence, associati)108 465.6 R(vity)-.25 E 3.329(,a)-.65 G .829(nd v)-3.329 F .829 (alues are the same as in the C language.)-.25 F .828(The fol-)5.828 F (lo)108 477.6 Q .439(wing list of operators is grouped into le)-.25 F -.15(ve)-.25 G .439(ls of equal-precedence operators.).15 F .44(The le) 5.44 F -.15(ve)-.25 G .44(ls are listed in order).15 F (of decreasing precedence.)108 489.6 Q F1(id)108 506.4 Q F2(++)A F1(id) 2.5 E F2A F0 -.25(va)144 518.4 S (riable post-increment and post-decrement).25 E F2 2.5108 530.4 S F0(unary minus and plus)144 530.4 Q F2(++)108 542.4 Q F1(id)A F2 2.5 E F1(id)A F0 -.25(va)144 554.4 S (riable pre-increment and pre-decrement).25 E F2 2.5(!~)108 566.4 S F0 (logical and bitwise ne)144 566.4 Q -.05(ga)-.15 G(tion).05 E F2(**)108 578.4 Q F0 -.15(ex)144 578.4 S(ponentiation).15 E F2 2.5(*/%)108 590.4 S F0(multiplication, di)144 590.4 Q(vision, remainder)-.25 E F2 2.5<2bad> 108 602.4 S F0(addition, subtraction)144 602.4 Q F2(<< >>)108 614.4 Q F0 (left and right bitwise shifts)144 614.4 Q F2(<= >= < >)108 626.4 Q F0 (comparison)144 638.4 Q F2(== !=)108 650.4 Q F0(equality and inequality) 144 650.4 Q F2(&)108 662.4 Q F0(bitwise AND)144 662.4 Q F2(^)108 674.4 Q F0(bitwise e)144 674.4 Q(xclusi)-.15 E .3 -.15(ve O)-.25 H(R).15 E F2(|) 108 686.4 Q F0(bitwise OR)144 686.4 Q F2(&&)108 698.4 Q F0(logical AND) 144 698.4 Q F2(||)108 710.4 Q F0(logical OR)144 710.4 Q(GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(32)190.395 E 0 Cg EP %%Page: 33 33 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10 /Times-Italic@0 SF -.2(ex)108 84 S(pr).2 E/F2 10/Times-Bold@0 SF(?)A F1 -.2(ex)C(pr).2 E F2(:)A F1 -.2(ex)C(pr).2 E F0(conditional operator)144 96 Q F2 2.5(=*)108 108 S 2.5(=/)-2.5 G 2.5(=%)-2.5 G 2.5(=+)-2.5 G 2.5 <3dad>-2.5 G 2.5(=<)-2.5 G(<= >>= &= ^= |=)-2.5 E F0(assignment)144 120 Q F1 -.2(ex)108 132 S(pr1).2 E F2(,)2.5 E F1 -.2(ex)2.5 G(pr2).2 E F0 (comma)144 144 Q .68(Shell v)108 160.8 R .68(ariables are allo)-.25 F .68(wed as operands; parameter e)-.25 F .68 (xpansion is performed before the e)-.15 F .68(xpression is e)-.15 F -.25(va)-.25 G(lu-).25 E 3.507(ated. W)108 172.8 R 1.007(ithin an e)-.4 F 1.007(xpression, shell v)-.15 F 1.007 (ariables may also be referenced by name without using the parameter) -.25 F -.15(ex)108 184.8 S .165(pansion syntax.).15 F 2.665(As)5.165 G .165(hell v)-2.665 F .165(ariable that is null or unset e)-.25 F -.25 (va)-.25 G .165(luates to 0 when referenced by name without us-).25 F .42(ing the parameter e)108 196.8 R .42(xpansion syntax.)-.15 F .42 (The v)5.42 F .421(alue of a v)-.25 F .421(ariable is e)-.25 F -.25(va) -.25 G .421(luated as an arithmetic e).25 F .421(xpression when)-.15 F .154(it is referenced, or when a v)108 208.8 R .154 (ariable which has been gi)-.25 F -.15(ve)-.25 G 2.654(nt).15 G(he) -2.654 E F1(inte)2.654 E -.1(ge)-.4 G(r).1 E F0(attrib)2.654 E .153 (ute using)-.2 F F2(declar)2.653 E 2.653<65ad>-.18 G(i)-2.653 E F0 .153 (is assigned a)2.653 F -.25(va)108 220.8 S 2.857(lue. A).25 F .357 (null v)2.857 F .357(alue e)-.25 F -.25(va)-.25 G .357(luates to 0.).25 F 2.857(As)5.357 G .357(hell v)-2.857 F .357(ariable need not ha)-.25 F .657 -.15(ve i)-.2 H(ts).15 E F1(inte)2.857 E -.1(ge)-.4 G(r).1 E F0 (attrib)2.857 E .357(ute turned on to be used)-.2 F(in an e)108 232.8 Q (xpression.)-.15 E(Inte)108 249.6 Q .518(ger constants follo)-.15 F 3.018(wt)-.25 G .518(he C language de\214nition, without suf)-3.018 F <8c78>-.25 E .517(es or character constants.)-.15 F .517(Constants with) 5.517 F 3.282(al)108 261.6 S .782 (eading 0 are interpreted as octal numbers.)-3.282 F 3.283(Al)5.782 G .783(eading 0x or 0X denotes he)-3.283 F 3.283(xadecimal. Otherwise,) -.15 F(num-)3.283 E .816(bers tak)108 273.6 R 3.316(et)-.1 G .816 (he form [)-3.316 F F1(base#)A F0 .815(]n, where the optional)B F1(base) 3.315 E F0 .815(is a decimal number between 2 and 64 representing)3.315 F .349(the arithmetic base, and)108 285.6 R F1(n)2.849 E F0 .349 (is a number in that base.)2.849 F(If)5.35 E F1(base#)2.85 E F0 .35 (is omitted, then base 10 is used.)2.85 F .35(When speci-)5.35 F(fying) 108 297.6 Q F1(n)2.975 E F0 2.975(,i)C 2.975(fan)-2.975 G .474(on-digit\ is required, the digits greater than 9 are represented by the lo)-2.975 F .474(wercase letters, the up-)-.25 F .518 (percase letters, @, and _, in that order)108 309.6 R 5.518(.I)-.55 G(f) -5.518 E F1(base)3.018 E F0 .518(is less than or equal to 36, lo)3.018 F .518(wercase and uppercase letters)-.25 F (may be used interchangeably to represent numbers between 10 and 35.)108 321.6 Q .235(Operators are e)108 338.4 R -.25(va)-.25 G .235 (luated in order of precedence.).25 F(Sub-e)5.234 E .234 (xpressions in parentheses are e)-.15 F -.25(va)-.25 G .234 (luated \214rst and may).25 F -.15(ove)108 350.4 S (rride the precedence rules abo).15 E -.15(ve)-.15 G(.).15 E/F3 10.95 /Times-Bold@0 SF(CONDITION)72 367.2 Q(AL EXPRESSIONS)-.219 E F0 .255 (Conditional e)108 379.2 R .255(xpressions are used by the)-.15 F F2([[) 2.755 E F0 .255(compound command and the)2.755 F F2(test)2.755 E F0(and) 2.755 E F2([)2.756 E F0 -.2(bu)2.756 G .256(iltin commands to test).2 F .134(\214le attrib)108 391.2 R .134 (utes and perform string and arithmetic comparisons.)-.2 F(The)5.133 E F2(test)2.633 E F0(and)2.633 E F2([)2.633 E F0 .133 (commands determine their be-)2.633 F(ha)108 403.2 Q .197 (vior based on the number of ar)-.2 F .198 (guments; see the descriptions of those commands for an)-.18 F 2.698(yo) -.15 G .198(ther command-)-2.698 F(speci\214c actions.)108 415.2 Q .235 (Expressions are formed from the follo)108 432 R .234 (wing unary or binary primaries.)-.25 F F2(Bash)5.234 E F0 .234 (handles se)2.734 F -.15(ve)-.25 G .234(ral \214lenames spe-).15 F .424 (cially when the)108 444 R 2.924(ya)-.15 G .424(re used in e)-2.924 F 2.925(xpressions. If)-.15 F .425(the operating system on which)2.925 F F2(bash)2.925 E F0 .425(is running pro)2.925 F .425(vides these)-.15 F .345(special \214les, bash will use them; otherwise it will emulate the\ m internally with this beha)108 456 R .344(vior: If an)-.2 F(y)-.15 E F1 (\214le)2.844 E F0(ar)2.844 E(-)-.2 E .805 (gument to one of the primaries is of the form)108 468 R F1(/de)3.305 E (v/fd/n)-.15 E F0 3.306(,t)C .806(hen \214le descriptor)-3.306 F F1(n) 3.306 E F0 .806(is check)3.306 F 3.306(ed. If)-.1 F(the)3.306 E F1 (\214le)3.306 E F0(ar)3.306 E(gu-)-.18 E .03 (ment to one of the primaries is one of)108 480 R F1(/de)2.53 E(v/stdin) -.15 E F0(,)A F1(/de)2.529 E(v/stdout)-.15 E F0 2.529(,o)C(r)-2.529 E F1 (/de)2.529 E(v/stderr)-.15 E F0 2.529<2c8c>C .029 (le descriptor 0, 1, or 2, respec-)-2.529 F(ti)108 492 Q -.15(ve)-.25 G (ly).15 E 2.5(,i)-.65 G 2.5(sc)-2.5 G(heck)-2.5 E(ed.)-.1 E .721 (Unless otherwise speci\214ed, primaries that operate on \214les follo) 108 508.8 R 3.221(ws)-.25 G .722(ymbolic links and operate on the tar) -3.221 F(get)-.18 E(of the link, rather than the link itself.)108 520.8 Q 1.096(When used with)108 538.8 R F2([[)3.596 E F0 3.596(,t)C(he)-3.596 E F2(<)3.596 E F0(and)3.595 E F2(>)3.595 E F0 1.095(operators sort le) 3.595 F 1.095(xicographically using the current locale.)-.15 F(The)6.095 E F2(test)3.595 E F0(com-)3.595 E(mand sorts using ASCII ordering.)108 550.8 Q F2108 574.8 Q F1(\214le)2.5 E F0 -.35(Tr)144 574.8 S (ue if).35 E F1(\214le)2.5 E F0 -.15(ex)2.5 G(ists.).15 E F2108 586.8 Q F1(\214le)2.5 E F0 -.35(Tr)144 586.8 S(ue if).35 E F1(\214le)2.5 E F0 -.15(ex)2.5 G(ists and is a block special \214le.).15 E F2108 598.8 Q F1(\214le)2.5 E F0 -.35(Tr)144 598.8 S(ue if).35 E F1(\214le)2.5 E F0 -.15(ex)2.5 G(ists and is a character special \214le.).15 E F2 108 610.8 Q F1(\214le)2.5 E F0 -.35(Tr)144 610.8 S(ue if).35 E F1 (\214le)2.5 E F0 -.15(ex)2.5 G(ists and is a directory).15 E(.)-.65 E F2 108 622.8 Q F1(\214le)2.5 E F0 -.35(Tr)144 622.8 S(ue if).35 E F1 (\214le)2.5 E F0 -.15(ex)2.5 G(ists.).15 E F2108 634.8 Q F1 (\214le)2.5 E F0 -.35(Tr)144 634.8 S(ue if).35 E F1(\214le)2.5 E F0 -.15 (ex)2.5 G(ists and is a re).15 E(gular \214le.)-.15 E F2108 646.8 Q F1(\214le)2.5 E F0 -.35(Tr)144 646.8 S(ue if).35 E F1(\214le)2.5 E F0 -.15(ex)2.5 G(ists and is set-group-id.).15 E F2108 658.8 Q F1 (\214le)2.5 E F0 -.35(Tr)144 658.8 S(ue if).35 E F1(\214le)2.5 E F0 -.15 (ex)2.5 G(ists and is a symbolic link.).15 E F2108 670.8 Q F1 (\214le)2.5 E F0 -.35(Tr)144 670.8 S(ue if).35 E F1(\214le)2.5 E F0 -.15 (ex)2.5 G(ists and its `).15 E(`stick)-.74 E(y')-.15 E 2.5('b)-.74 G (it is set.)-2.5 E F2108 682.8 Q F1(\214le)2.5 E F0 -.35(Tr)144 682.8 S(ue if).35 E F1(\214le)2.5 E F0 -.15(ex)2.5 G (ists and is a named pipe \(FIFO\).).15 E F2108 694.8 Q F1(\214le) 2.5 E F0 -.35(Tr)144 694.8 S(ue if).35 E F1(\214le)2.5 E F0 -.15(ex)2.5 G(ists and is readable.).15 E F2108 706.8 Q F1(\214le)2.5 E F0 -.35(Tr)144 706.8 S(ue if).35 E F1(\214le)2.5 E F0 -.15(ex)2.5 G (ists and has a size greater than zero.).15 E F2108 718.8 Q F1(fd) 2.5 E F0 -.35(Tr)144 718.8 S(ue if \214le descriptor).35 E F1(fd)4.47 E F0(is open and refers to a terminal.)3.27 E(GNU Bash 5.1)72 768 Q (2020 October 29)141.235 E(33)190.395 E 0 Cg EP %%Page: 34 34 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10/Times-Bold@0 SF108 84 Q/F2 10/Times-Italic@0 SF(\214le)2.5 E F0 -.35(Tr)144 84 S(ue if).35 E F2(\214le)2.5 E F0 -.15(ex)2.5 G(ists and its set-user).15 E(-id bit is set.)-.2 E F1108 96 Q F2(\214le)2.5 E F0 -.35(Tr)144 96 S(ue if).35 E F2(\214le)2.5 E F0 -.15(ex)2.5 G(ists and is writable.) .15 E F1108 108 Q F2(\214le)2.5 E F0 -.35(Tr)144 108 S(ue if).35 E F2(\214le)2.5 E F0 -.15(ex)2.5 G(ists and is e).15 E -.15(xe)-.15 G (cutable.).15 E F1108 120 Q F2(\214le)2.5 E F0 -.35(Tr)144 120 S (ue if).35 E F2(\214le)2.5 E F0 -.15(ex)2.5 G(ists and is o).15 E (wned by the ef)-.25 E(fecti)-.25 E .3 -.15(ve g)-.25 H(roup id.).15 E F1108 132 Q F2(\214le)2.5 E F0 -.35(Tr)144 132 S(ue if).35 E F2 (\214le)2.5 E F0 -.15(ex)2.5 G(ists and is a symbolic link.).15 E F1 108 144 Q F2(\214le)2.5 E F0 -.35(Tr)144 144 S(ue if).35 E F2 (\214le)2.5 E F0 -.15(ex)2.5 G(ists and has been modi\214ed since it w) .15 E(as last read.)-.1 E F1108 156 Q F2(\214le)2.5 E F0 -.35(Tr) 144 156 S(ue if).35 E F2(\214le)2.5 E F0 -.15(ex)2.5 G(ists and is o).15 E(wned by the ef)-.25 E(fecti)-.25 E .3 -.15(ve u)-.25 H(ser id.).15 E F1108 168 Q F2(\214le)2.5 E F0 -.35(Tr)144 168 S(ue if).35 E F2 (\214le)2.5 E F0 -.15(ex)2.5 G(ists and is a sock).15 E(et.)-.1 E F2 (\214le1)108 180 Q F1(\255ef)2.5 E F2(\214le2)2.5 E F0 -.35(Tr)144 192 S (ue if).35 E F2(\214le1)2.5 E F0(and)2.5 E F2(\214le2)2.5 E F0 (refer to the same de)2.5 E(vice and inode numbers.)-.25 E F2(\214le1) 108 204 Q F02.5 E F1(nt)A F2(\214le2)2.5 E F0 -.35(Tr)144 216 S (ue if).35 E F2(\214le1)2.5 E F0(is ne)2.5 E (wer \(according to modi\214cation date\) than)-.25 E F2(\214le2)2.5 E F0 2.5(,o)C 2.5(ri)-2.5 G(f)-2.5 E F2(\214le1)2.5 E F0 -.15(ex)2.5 G (ists and).15 E F2(\214le2)2.5 E F0(does not.)2.5 E F2(\214le1)108 228 Q F02.5 E F1(ot)A F2(\214le2)2.5 E F0 -.35(Tr)144 240 S(ue if).35 E F2 (\214le1)2.5 E F0(is older than)2.5 E F2(\214le2)2.5 E F0 2.5(,o)C 2.5 (ri)-2.5 G(f)-2.5 E F2(\214le2)2.5 E F0 -.15(ex)2.5 G(ists and).15 E F2 (\214le1)2.5 E F0(does not.)2.5 E F1108 252 Q F2(optname)2.5 E F0 -.35(Tr)144 264 S .262(ue if the shell option).35 F F2(optname)2.992 E F0 .262(is enabled.)2.942 F .262 (See the list of options under the description of the)5.262 F F1 2.763 E F0(option to the)144 276 Q F1(set)2.5 E F0 -.2(bu)2.5 G (iltin belo).2 E -.65(w.)-.25 G F1108 288 Q F2(varname)2.5 E F0 -.35(Tr)144 300 S(ue if the shell v).35 E(ariable)-.25 E F2(varname)2.79 E F0(is set \(has been assigned a v)2.68 E(alue\).)-.25 E F1108 312 Q F2(varname)2.5 E F0 -.35(Tr)144 324 S(ue if the shell v).35 E (ariable)-.25 E F2(varname)2.79 E F0(is set and is a name reference.) 2.68 E F1108 336 Q F2(string)2.5 E F0 -.35(Tr)144 348 S (ue if the length of).35 E F2(string)2.5 E F0(is zero.)2.5 E F2(string) 108 360 Q F1108 372 Q F2(string)2.5 E F0 -.35(Tr)144 384 S (ue if the length of).35 E F2(string)2.84 E F0(is non-zero.)2.72 E F2 (string1)108 400.8 Q F1(==)2.5 E F2(string2)2.5 E(string1)108 412.8 Q F1 (=)2.5 E F2(string2)2.5 E F0 -.35(Tr)144 424.8 S .862 (ue if the strings are equal.).35 F F1(=)5.861 E F0 .861 (should be used with the)3.361 F F1(test)3.361 E F0 .861 (command for POSIX conformance.)3.361 F .446(When used with the)144 436.8 R F1([[)2.946 E F0 .446 (command, this performs pattern matching as described abo)2.946 F .747 -.15(ve \()-.15 H F1(Compound).15 E(Commands)144 448.8 Q F0(\).)A F2 (string1)108 465.6 Q F1(!=)2.5 E F2(string2)2.5 E F0 -.35(Tr)144 477.6 S (ue if the strings are not equal.).35 E F2(string1)108 494.4 Q F1(<)2.5 E F2(string2)2.5 E F0 -.35(Tr)144 506.4 S(ue if).35 E F2(string1)2.5 E F0(sorts before)2.5 E F2(string2)2.5 E F0(le)2.5 E(xicographically)-.15 E(.)-.65 E F2(string1)108 523.2 Q F1(>)2.5 E F2(string2)2.5 E F0 -.35 (Tr)144 535.2 S(ue if).35 E F2(string1)2.5 E F0(sorts after)2.5 E F2 (string2)2.5 E F0(le)2.5 E(xicographically)-.15 E(.)-.65 E F2(ar)108.33 552 Q(g1)-.37 E F1(OP)2.5 E F2(ar)2.5 E(g2)-.37 E/F3 9/Times-Bold@0 SF (OP)144 564 Q F0 .385(is one of)2.635 F F1(\255eq)2.885 E F0(,)A F1 (\255ne)2.885 E F0(,)A F1(\255lt)2.885 E F0(,)A F1(\255le)2.885 E F0(,)A F1(\255gt)2.885 E F0 2.885(,o)C(r)-2.885 E F1(\255ge)2.885 E F0 5.385 (.T)C .385(hese arithmetic binary operators return true if)-5.385 F F2 (ar)2.884 E(g1)-.37 E F0 .845(is equal to, not equal to, less than, les\ s than or equal to, greater than, or greater than or equal to)144 576 R F2(ar)144 588 Q(g2)-.37 E F0 3.59(,r)C(especti)-3.59 E -.15(ve)-.25 G (ly).15 E(.)-.65 E F2(Ar)7.1 E(g1)-.37 E F0(and)3.59 E F2(ar)3.92 E(g2) -.37 E F0 1.089(may be positi)3.61 F 1.389 -.15(ve o)-.25 H 3.589(rn).15 G -2.25 -.15(eg a)-3.589 H(ti).15 E 1.389 -.15(ve i)-.25 H(nte).15 E 3.589(gers. When)-.15 F 1.089(used with the)3.589 F F1([[)3.589 E F0 (command,)144 600 Q F2(Ar)4.447 E(g1)-.37 E F0(and)3.437 E F2(Ar)4.447 E (g2)-.37 E F0 .937(are e)3.457 F -.25(va)-.25 G .937 (luated as arithmetic e).25 F .937(xpressions \(see)-.15 F F3 .937 (ARITHMETIC EV)3.437 F(ALU)-1.215 E(A-)-.54 E(TION)144 612 Q F0(abo)2.25 E -.15(ve)-.15 G(\).).15 E/F4 10.95/Times-Bold@0 SF(SIMPLE COMMAND EXP) 72 628.8 Q(ANSION)-.81 E F0 .614(When a simple command is e)108 640.8 R -.15(xe)-.15 G .614(cuted, the shell performs the follo).15 F .613 (wing e)-.25 F .613(xpansions, assignments, and redi-)-.15 F (rections, from left to right, in the follo)108 652.8 Q(wing order)-.25 E(.)-.55 E(1.)108 669.6 Q 1.848(The w)144 669.6 R 1.848 (ords that the parser has mark)-.1 F 1.848(ed as v)-.1 F 1.849 (ariable assignments \(those preceding the command)-.25 F (name\) and redirections are sa)144 681.6 Q -.15(ve)-.2 G 2.5(df).15 G (or later processing.)-2.5 E(2.)108 698.4 Q .18(The w)144 698.4 R .18 (ords that are not v)-.1 F .179 (ariable assignments or redirections are e)-.25 F 2.679(xpanded. If)-.15 F(an)2.679 E 2.679(yw)-.15 G .179(ords remain af-)-2.779 F .346(ter e) 144 710.4 R .346(xpansion, the \214rst w)-.15 F .346(ord is tak)-.1 F .347(en to be the name of the command and the remaining w)-.1 F .347 (ords are)-.1 F(the ar)144 722.4 Q(guments.)-.18 E(GNU Bash 5.1)72 768 Q (2020 October 29)141.235 E(34)190.395 E 0 Cg EP %%Page: 35 35 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E(3.)108 84 Q (Redirections are performed as described abo)144 84 Q .3 -.15(ve u)-.15 H(nder).15 E/F1 9/Times-Bold@0 SF(REDIRECTION)2.5 E/F2 9/Times-Roman@0 SF(.)A F0(4.)108 100.8 Q .717(The te)144 100.8 R .717(xt after the)-.15 F/F3 10/Times-Bold@0 SF(=)3.217 E F0 .717(in each v)3.217 F .717 (ariable assignment under)-.25 F .717(goes tilde e)-.18 F .717 (xpansion, parameter e)-.15 F(xpansion,)-.15 E .339 (command substitution, arithmetic e)144 112.8 R .339 (xpansion, and quote remo)-.15 F -.25(va)-.15 G 2.839(lb).25 G .339 (efore being assigned to the v)-2.839 F(ari-)-.25 E(able.)144 124.8 Q .332(If no command name results, the v)108 141.6 R .332 (ariable assignments af)-.25 F .332(fect the current shell en)-.25 F 2.832(vironment. Otherwise,)-.4 F(the)2.832 E -.25(va)108 153.6 S .757 (riables are added to the en).25 F .757(vironment of the e)-.4 F -.15 (xe)-.15 G .757(cuted command and do not af).15 F .757 (fect the current shell en)-.25 F(vi-)-.4 E 3.177(ronment. If)108 165.6 R(an)3.177 E 3.177(yo)-.15 G 3.177(ft)-3.177 G .677 (he assignments attempts to assign a v)-3.177 F .677 (alue to a readonly v)-.25 F .676(ariable, an error occurs, and)-.25 F (the command e)108 177.6 Q(xits with a non-zero status.)-.15 E .149 (If no command name results, redirections are performed, b)108 194.4 R .149(ut do not af)-.2 F .15(fect the current shell en)-.25 F 2.65 (vironment. A)-.4 F(redirection error causes the command to e)108 206.4 Q(xit with a non-zero status.)-.15 E 1.064 (If there is a command name left after e)108 223.2 R 1.064(xpansion, e) -.15 F -.15(xe)-.15 G 1.064(cution proceeds as described belo).15 F 4.864 -.65(w. O)-.25 H 1.064(therwise, the).65 F .068(command e)108 235.2 R 2.568(xits. If)-.15 F .069(one of the e)2.568 F .069 (xpansions contained a command substitution, the e)-.15 F .069 (xit status of the command)-.15 F .467(is the e)108 247.2 R .466 (xit status of the last command substitution performed.)-.15 F .466 (If there were no command substitutions, the)5.466 F(command e)108 259.2 Q(xits with a status of zero.)-.15 E/F4 10.95/Times-Bold@0 SF (COMMAND EXECUTION)72 276 Q F0 .546 (After a command has been split into w)108 288 R .547 (ords, if it results in a simple command and an optional list of ar)-.1 F(gu-)-.18 E(ments, the follo)108 300 Q(wing actions are tak)-.25 E(en.) -.1 E .379(If the command name contains no slashes, the shell attempts \ to locate it.)108 316.8 R .379(If there e)5.379 F .379 (xists a shell function by)-.15 F .246(that name, that function is in) 108 328.8 R -.2(vo)-.4 G -.1(ke).2 G 2.746(da).1 G 2.746(sd)-2.746 G .246(escribed abo)-2.746 F .546 -.15(ve i)-.15 H(n).15 E F1(FUNCTIONS) 2.746 E F2(.)A F0 .246(If the name does not match a func-)4.746 F (tion, the shell searches for it in the list of shell b)108 340.8 Q 2.5 (uiltins. If)-.2 F 2.5(am)2.5 G(atch is found, that b)-2.5 E (uiltin is in)-.2 E -.2(vo)-.4 G -.1(ke).2 G(d.).1 E .31 (If the name is neither a shell function nor a b)108 357.6 R .309 (uiltin, and contains no slashes,)-.2 F F3(bash)2.809 E F0 .309 (searches each element of)2.809 F(the)108 369.6 Q F1 -.666(PA)3.162 G (TH)-.189 E F0 .662(for a directory containing an e)2.912 F -.15(xe)-.15 G .662(cutable \214le by that name.).15 F F3(Bash)5.662 E F0 .663 (uses a hash table to remember)3.162 F 1.915(the full pathnames of e)108 381.6 R -.15(xe)-.15 G 1.915(cutable \214les \(see).15 F F3(hash)4.415 E F0(under)4.415 E F1 1.915(SHELL B)4.415 F(UIL)-.09 E 1.914(TIN COMMANDS) -.828 F F0(belo)4.164 E 4.414(w\). A)-.25 F(full)4.414 E .719 (search of the directories in)108 393.6 R F1 -.666(PA)3.219 G(TH)-.189 E F0 .72(is performed only if the command is not found in the hash table.) 2.969 F .72(If the)5.72 F .956(search is unsuccessful, the shell search\ es for a de\214ned shell function named)108 405.6 R F3(command_not_f) 3.455 E(ound_han-)-.25 E(dle)108 417.6 Q F0 6.005(.I)C 3.505(ft)-6.005 G 1.005(hat function e)-3.505 F 1.005(xists, it is in)-.15 F -.2(vo)-.4 G -.1(ke).2 G 3.506(di).1 G 3.506(nas)-3.506 G 1.006(eparate e)-3.506 F -.15(xe)-.15 G 1.006(cution en).15 F 1.006 (vironment with the original command)-.4 F .256 (and the original command')108 429.6 R 2.756(sa)-.55 G -.18(rg)-2.756 G .256(uments as its ar).18 F .256(guments, and the function')-.18 F 2.755 (se)-.55 G .255(xit status becomes the e)-2.905 F .255(xit sta-)-.15 F .263(tus of that subshell.)108 441.6 R .263(If that function is not de\ \214ned, the shell prints an error message and returns an e)5.263 F .263 (xit sta-)-.15 F(tus of 127.)108 453.6 Q 1.089(If the search is success\ ful, or if the command name contains one or more slashes, the shell e) 108 470.4 R -.15(xe)-.15 G 1.089(cutes the).15 F .197 (named program in a separate e)108 482.4 R -.15(xe)-.15 G .197 (cution en).15 F 2.698(vironment. Ar)-.4 F .198 (gument 0 is set to the name gi)-.18 F -.15(ve)-.25 G .198 (n, and the remain-).15 F(ing ar)108 494.4 Q (guments to the command are set to the ar)-.18 E(guments gi)-.18 E -.15 (ve)-.25 G(n, if an).15 E -.65(y.)-.15 G 1.049(If this e)108 511.2 R -.15(xe)-.15 G 1.049(cution f).15 F 1.049 (ails because the \214le is not in e)-.1 F -.15(xe)-.15 G 1.048 (cutable format, and the \214le is not a directory).15 F 3.548(,i)-.65 G 3.548(ti)-3.548 G 3.548(sa)-3.548 G(s-)-3.548 E .042(sumed to be a)108 523.2 R/F5 10/Times-Italic@0 SF .042(shell script)2.542 F F0 2.542 (,a\214)C .043(le containing shell commands.)-2.542 F 2.543(As)5.043 G .043(ubshell is spa)-2.543 F .043(wned to e)-.15 F -.15(xe)-.15 G .043 (cute it.).15 F .043(This sub-)5.043 F .275 (shell reinitializes itself, so that the ef)108 535.2 R .274 (fect is as if a ne)-.25 F 2.774(ws)-.25 G .274(hell had been in)-2.774 F -.2(vo)-.4 G -.1(ke).2 G 2.774(dt).1 G 2.774(oh)-2.774 G .274 (andle the script, with the)-2.774 F -.15(ex)108 547.2 S 2.357 (ception that the locations of commands remembered by the parent \(see) .15 F F3(hash)4.858 E F0(belo)4.858 E 4.858(wu)-.25 G(nder)-4.858 E F1 (SHELL)4.858 E -.09(BU)108 559.2 S(IL).09 E(TIN COMMANDS)-.828 E F2(\))A F0(are retained by the child.)2.25 E .348(If the program is a \214le be) 108 576 R .348(ginning with)-.15 F F3(#!)2.848 E F0 2.848(,t)C .347(he \ remainder of the \214rst line speci\214es an interpreter for the pro-) -2.848 F 3.178(gram. The)108 588 R .678(shell e)3.178 F -.15(xe)-.15 G .678(cutes the speci\214ed interpreter on operating systems that do not\ handle this e).15 F -.15(xe)-.15 G(cutable).15 E .206(format themselv) 108 600 R 2.706(es. The)-.15 F(ar)2.706 E .206 (guments to the interpreter consist of a single optional ar)-.18 F .206 (gument follo)-.18 F .206(wing the in-)-.25 F .267 (terpreter name on the \214rst line of the program, follo)108 612 R .268 (wed by the name of the program, follo)-.25 F .268(wed by the com-)-.25 F(mand ar)108 624 Q(guments, if an)-.18 E -.65(y.)-.15 G F4 (COMMAND EXECUTION ENVIR)72 640.8 Q(ONMENT)-.329 E F0(The shell has an) 108 652.8 Q F5 -.2(ex)2.5 G(ecution en).2 E(vir)-.4 E(onment)-.45 E F0 2.5(,w)C(hich consists of the follo)-2.5 E(wing:)-.25 E<83>108 669.6 Q 1.406(open \214les inherited by the shell at in)144 669.6 R -.2(vo)-.4 G 1.405(cation, as modi\214ed by redirections supplied to the).2 F F3 (exec)3.905 E F0 -.2(bu)144 681.6 S(iltin).2 E<83>108 698.4 Q (the current w)144 698.4 Q(orking directory as set by)-.1 E F3(cd)2.5 E F0(,)A F3(pushd)2.5 E F0 2.5(,o)C(r)-2.5 E F3(popd)2.5 E F0 2.5(,o)C 2.5 (ri)-2.5 G(nherited by the shell at in)-2.5 E -.2(vo)-.4 G(cation).2 E <83>108 715.2 Q(the \214le creation mode mask as set by)144 715.2 Q F3 (umask)2.5 E F0(or inherited from the shell')2.5 E 2.5(sp)-.55 G(arent) -2.5 E(GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(35)190.395 E 0 Cg EP %%Page: 36 36 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E<83>108 84 Q (current traps set by)144 84 Q/F1 10/Times-Bold@0 SF(trap)2.5 E F0<83> 108 100.8 Q .256(shell parameters that are set by v)144 100.8 R .256 (ariable assignment or with)-.25 F F1(set)2.756 E F0 .257 (or inherited from the shell')2.756 F 2.757(sp)-.55 G(arent)-2.757 E (in the en)144 112.8 Q(vironment)-.4 E<83>108 129.6 Q (shell functions de\214ned during e)144 129.6 Q -.15(xe)-.15 G (cution or inherited from the shell').15 E 2.5(sp)-.55 G (arent in the en)-2.5 E(vironment)-.4 E<83>108 146.4 Q (options enabled at in)144 146.4 Q -.2(vo)-.4 G(cation \(either by def) .2 E(ault or with command-line ar)-.1 E(guments\) or by)-.18 E F1(set) 2.5 E F0<83>108 163.2 Q(options enabled by)144 163.2 Q F1(shopt)2.5 E F0 <83>108 180 Q(shell aliases de\214ned with)144 180 Q F1(alias)2.5 E F0 <83>108 196.8 Q -.25(va)144 196.8 S (rious process IDs, including those of background jobs, the v).25 E (alue of)-.25 E F1($$)2.5 E F0 2.5(,a)C(nd the v)-2.5 E(alue of)-.25 E /F2 9/Times-Bold@0 SF(PPID)2.5 E F0 .427 (When a simple command other than a b)108 213.6 R .426 (uiltin or shell function is to be e)-.2 F -.15(xe)-.15 G .426 (cuted, it is in).15 F -.2(vo)-.4 G -.1(ke).2 G 2.926(di).1 G 2.926(nas) -2.926 G(eparate)-2.926 E -.15(exe)108 225.6 S .133(cution en).15 F .133 (vironment that consists of the follo)-.4 F 2.634(wing. Unless)-.25 F .134(otherwise noted, the v)2.634 F .134(alues are inherited from)-.25 F (the shell.)108 237.6 Q<83>108 254.4 Q 1.056(the shell')144 254.4 R 3.556(so)-.55 G 1.056(pen \214les, plus an)-3.556 F 3.556(ym)-.15 G 1.056 (odi\214cations and additions speci\214ed by redirections to the com-) -3.556 F(mand)144 266.4 Q<83>108 283.2 Q(the current w)144 283.2 Q (orking directory)-.1 E<83>108 300 Q(the \214le creation mode mask)144 300 Q<83>108 316.8 Q .856(shell v)144 316.8 R .857 (ariables and functions mark)-.25 F .857(ed for e)-.1 F .857 (xport, along with v)-.15 F .857(ariables e)-.25 F .857 (xported for the command,)-.15 F(passed in the en)144 328.8 Q(vironment) -.4 E<83>108 345.6 Q .307(traps caught by the shell are reset to the v) 144 345.6 R .306(alues inherited from the shell')-.25 F 2.806(sp)-.55 G .306(arent, and traps ignored)-2.806 F(by the shell are ignored)144 357.6 Q 2.5(Ac)108 374.4 S(ommand in)-2.5 E -.2(vo)-.4 G -.1(ke).2 G 2.5 (di).1 G 2.5(nt)-2.5 G(his separate en)-2.5 E(vironment cannot af)-.4 E (fect the shell')-.25 E 2.5(se)-.55 G -.15(xe)-2.65 G(cution en).15 E (vironment.)-.4 E .577(Command substitution, commands grouped with pare\ ntheses, and asynchronous commands are in)108 391.2 R -.2(vo)-.4 G -.1 (ke).2 G 3.078(di).1 G(n)-3.078 E 2.745(as)108 403.2 S .245(ubshell en) -2.745 F .245(vironment that is a duplicate of the shell en)-.4 F .244 (vironment, e)-.4 F .244(xcept that traps caught by the shell are)-.15 F .358(reset to the v)108 415.2 R .358 (alues that the shell inherited from its parent at in)-.25 F -.2(vo)-.4 G 2.858(cation. Builtin).2 F .359(commands that are in)2.859 F -.2(vo) -.4 G -.1(ke).2 G(d).1 E .857(as part of a pipeline are also e)108 427.2 R -.15(xe)-.15 G .856(cuted in a subshell en).15 F 3.356 (vironment. Changes)-.4 F .856(made to the subshell en)3.356 F(viron-) -.4 E(ment cannot af)108 439.2 Q(fect the shell')-.25 E 2.5(se)-.55 G -.15(xe)-2.65 G(cution en).15 E(vironment.)-.4 E 1.376(Subshells spa)108 456 R 1.376(wned to e)-.15 F -.15(xe)-.15 G 1.377 (cute command substitutions inherit the v).15 F 1.377(alue of the)-.25 F F13.877 E F0 1.377(option from the parent)3.877 F 2.5(shell. When) 108 468 R(not in)2.5 E/F3 10/Times-Italic@0 SF(posix mode)2.5 E F0(,)A F1(bash)2.5 E F0(clears the)2.5 E F12.5 E F0 (option in such subshells.)2.5 E .405(If a command is follo)108 484.8 R .405(wed by a)-.25 F F1(&)2.905 E F0 .404(and job control is not acti) 2.905 F -.15(ve)-.25 G 2.904(,t).15 G .404(he def)-2.904 F .404 (ault standard input for the command)-.1 F .197(is the empty \214le)108 496.8 R F3(/de)2.697 E(v/null)-.15 E F0 5.197(.O)C .197 (therwise, the in)-5.197 F -.2(vo)-.4 G -.1(ke).2 G 2.697(dc).1 G .198 (ommand inherits the \214le descriptors of the calling shell)-2.697 F (as modi\214ed by redirections.)108 508.8 Q/F4 10.95/Times-Bold@0 SF (ENVIR)72 525.6 Q(ONMENT)-.329 E F0 2.344(When a program is in)108 537.6 R -.2(vo)-.4 G -.1(ke).2 G 4.843(di).1 G 4.843(ti)-4.843 G 4.843(sg) -4.843 G -2.15 -.25(iv e)-4.843 H 4.843(na).25 G 4.843(na)-4.843 G 2.343 (rray of strings called the)-4.843 F F3(en)5.033 E(vir)-.4 E(onment)-.45 E F0 7.343(.T).68 G 2.343(his is a list of)-7.343 F F3(name)108 549.6 Q F0A F3(value)A F0(pairs, of the form)2.5 E F3(name)2.86 E F0(=)A F3 (value)A F0(.).18 E .438(The shell pro)108 566.4 R .438(vides se)-.15 F -.15(ve)-.25 G .438(ral w).15 F .438(ays to manipulate the en)-.1 F 2.938(vironment. On)-.4 F(in)2.938 E -.2(vo)-.4 G .438 (cation, the shell scans its o).2 F .439(wn en-)-.25 F .709(vironment a\ nd creates a parameter for each name found, automatically marking it fo\ r)108 578.4 R F3 -.2(ex)3.208 G(port).2 E F0 .708(to child pro-)3.888 F 2.703(cesses. Ex)108 590.4 R .203(ecuted commands inherit the en)-.15 F 2.703(vironment. The)-.4 F F1(export)2.703 E F0(and)2.703 E F1(declar) 2.703 E 2.703<65ad>-.18 G(x)-2.703 E F0 .203(commands allo)2.703 F 2.704 (wp)-.25 G(aram-)-2.704 E .332 (eters and functions to be added to and deleted from the en)108 602.4 R 2.832(vironment. If)-.4 F .332(the v)2.832 F .332 (alue of a parameter in the en-)-.25 F .131 (vironment is modi\214ed, the ne)108 614.4 R 2.631(wv)-.25 G .131 (alue becomes part of the en)-2.881 F .132 (vironment, replacing the old.)-.4 F .132(The en)5.132 F(vironment)-.4 E .321(inherited by an)108 626.4 R 2.821(ye)-.15 G -.15(xe)-2.971 G .321 (cuted command consists of the shell').15 F 2.821(si)-.55 G .321 (nitial en)-2.821 F .32(vironment, whose v)-.4 F .32(alues may be modi-) -.25 F .533(\214ed in the shell, less an)108 638.4 R 3.033(yp)-.15 G .534(airs remo)-3.033 F -.15(ve)-.15 G 3.034(db).15 G 3.034(yt)-3.034 G (he)-3.034 E F1(unset)3.034 E F0 .534(command, plus an)3.034 F 3.034(ya) -.15 G .534(dditions via the)-3.034 F F1(export)3.034 E F0(and)3.034 E F1(de-)3.034 E(clar)108 650.4 Q 2.5<65ad>-.18 G(x)-2.5 E F0(commands.) 2.5 E .563(The en)108 667.2 R .563(vironment for an)-.4 F(y)-.15 E F3 .563(simple command)3.403 F F0 .562 (or function may be augmented temporarily by pre\214xing it with)3.833 F .202(parameter assignments, as described abo)108 679.2 R .502 -.15(ve i) -.15 H(n).15 E F2 -.666(PA)2.702 G(RAMETERS).666 E/F5 9/Times-Roman@0 SF (.)A F0 .202(These assignment statements af)4.702 F .203(fect only the) -.25 F(en)108 691.2 Q(vironment seen by that command.)-.4 E .81(If the) 108 708 R F13.31 E F0 .81(option is set \(see the)3.31 F F1(set) 3.31 E F0 -.2(bu)3.31 G .81(iltin command belo).2 F .81(w\), then)-.25 F F3(all)3.64 E F0 .81(parameter assignments are placed in)3.82 F(the en) 108 720 Q (vironment for a command, not just those that precede the command name.) -.4 E(GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(36)190.395 E 0 Cg EP %%Page: 37 37 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E(When)108 84 Q/F1 10/Times-Bold@0 SF(bash)3.585 E F0(in)3.585 E -.2(vo)-.4 G -.1(ke).2 G 3.585(sa).1 G 3.585(ne)-3.585 G 1.085(xternal command, the v)-3.735 F (ariable)-.25 E F1(_)3.585 E F0 1.086 (is set to the full \214lename of the command and)3.586 F (passed to that command in its en)108 96 Q(vironment.)-.4 E/F2 10.95 /Times-Bold@0 SF(EXIT ST)72 112.8 Q -1.04(AT)-.986 G(US)1.04 E F0 .151 (The e)108 124.8 R .151(xit status of an e)-.15 F -.15(xe)-.15 G .151 (cuted command is the v).15 F .15(alue returned by the)-.25 F/F3 10 /Times-Italic@0 SF(waitpid)2.65 E F0 .15(system call or equi)2.65 F -.25 (va)-.25 G .15(lent func-).25 F 2.847(tion. Exit)108 136.8 R .347 (statuses f)2.847 F .347(all between 0 and 255, though, as e)-.1 F .347 (xplained belo)-.15 F 1.647 -.65(w, t)-.25 H .347(he shell may use v).65 F .348(alues abo)-.25 F .648 -.15(ve 1)-.15 H(25).15 E(specially)108 148.8 Q 5.507(.E)-.65 G .507(xit statuses from shell b)-5.507 F .507 (uiltins and compound commands are also limited to this range.)-.2 F (Under)5.506 E(certain circumstances, the shell will use special v)108 160.8 Q(alues to indicate speci\214c f)-.25 E(ailure modes.)-.1 E -.15 (Fo)108 177.6 S 3.372(rt).15 G .872(he shell')-3.372 F 3.372(sp)-.55 G .873(urposes, a command which e)-3.372 F .873(xits with a zero e)-.15 F .873(xit status has succeeded.)-.15 F .873(An e)5.873 F .873 (xit status of)-.15 F .049(zero indicates success.)108 189.6 R 2.549(An) 5.049 G .049(on-zero e)-2.549 F .049(xit status indicates f)-.15 F 2.549 (ailure. When)-.1 F 2.549(ac)2.549 G .048(ommand terminates on a f) -2.549 F .048(atal sig-)-.1 F(nal)108 201.6 Q F3(N)2.5 E F0(,)A F1(bash) 2.5 E F0(uses the v)2.5 E(alue of 128+)-.25 E F3(N)A F0(as the e)2.5 E (xit status.)-.15 E .404 (If a command is not found, the child process created to e)108 218.4 R -.15(xe)-.15 G .404(cute it returns a status of 127.).15 F .405 (If a command is)5.405 F(found b)108 230.4 Q(ut is not e)-.2 E -.15(xe) -.15 G(cutable, the return status is 126.).15 E(If a command f)108 247.2 Q(ails because of an error during e)-.1 E (xpansion or redirection, the e)-.15 E(xit status is greater than zero.) -.15 E .081(Shell b)108 264 R .081 (uiltin commands return a status of 0 \()-.2 F F3(true)A F0 2.581(\)i)C 2.581(fs)-2.581 G .08(uccessful, and non-zero \()-2.581 F F3(false)A F0 2.58(\)i)C 2.58(fa)-2.58 G 2.58(ne)-2.58 G .08(rror occurs while)-2.58 F (the)108 276 Q 2.967(ye)-.15 G -.15(xe)-3.117 G 2.967(cute. All).15 F -.2(bu)2.967 G .467(iltins return an e).2 F .468 (xit status of 2 to indicate incorrect usage, generally in)-.15 F -.25 (va)-.4 G .468(lid options or).25 F(missing ar)108 288 Q(guments.)-.18 E F1(Bash)108 304.8 Q F0 .202(itself returns the e)2.702 F .202 (xit status of the last command e)-.15 F -.15(xe)-.15 G .201 (cuted, unless a syntax error occurs, in which case).15 F(it e)108 316.8 Q(xits with a non-zero v)-.15 E 2.5(alue. See)-.25 F(also the)2.5 E F1 (exit)2.5 E F0 -.2(bu)2.5 G(iltin command belo).2 E -.65(w.)-.25 G F2 (SIGN)72 333.6 Q(ALS)-.219 E F0(When)108 345.6 Q F1(bash)2.502 E F0 .002 (is interacti)2.502 F -.15(ve)-.25 G 2.502(,i).15 G 2.502(nt)-2.502 G .002(he absence of an)-2.502 F 2.502(yt)-.15 G .002(raps, it ignores) -2.502 F/F4 9/Times-Bold@0 SF(SIGTERM)2.502 E F0 .002(\(so that)2.252 F F1 .002(kill 0)2.502 F F0 .002(does not kill an in-)2.502 F(teracti)108 357.6 Q 1.216 -.15(ve s)-.25 H .916(hell\), and).15 F F4(SIGINT)3.416 E F0 .915(is caught and handled \(so that the)3.166 F F1(wait)3.415 E F0 -.2(bu)3.415 G .915(iltin is interruptible\).).2 F .915(In all cases,) 5.915 F F1(bash)108 369.6 Q F0(ignores)2.5 E F4(SIGQ)2.5 E(UIT)-.09 E/F5 9/Times-Roman@0 SF(.)A F0(If job control is in ef)4.5 E(fect,)-.25 E F1 (bash)2.5 E F0(ignores)2.5 E F4(SIGTTIN)2.5 E F5(,)A F4(SIGTT)2.25 E(OU) -.162 E F5(,)A F0(and)2.25 E F4(SIGTSTP)2.5 E F5(.)A F0(Non-b)108 386.4 Q 1.064(uiltin commands run by)-.2 F F1(bash)3.564 E F0(ha)3.564 E 1.365 -.15(ve s)-.2 H 1.065(ignal handlers set to the v).15 F 1.065 (alues inherited by the shell from its)-.25 F 3.248(parent. When)108 398.4 R .748(job control is not in ef)3.248 F .747 (fect, asynchronous commands ignore)-.25 F F4(SIGINT)3.247 E F0(and) 2.997 E F4(SIGQ)3.247 E(UIT)-.09 E F0 .747(in addi-)2.997 F .652 (tion to these inherited handlers.)108 410.4 R .653 (Commands run as a result of command substitution ignore the k)5.652 F -.15(ey)-.1 G(board-).15 E(generated job control signals)108 422.4 Q F4 (SIGTTIN)2.5 E F5(,)A F4(SIGTT)2.25 E(OU)-.162 E F5(,)A F0(and)2.25 E F4 (SIGTSTP)2.5 E F5(.)A F0 2.046(The shell e)108 439.2 R 2.046 (xits by def)-.15 F 2.045(ault upon receipt of a)-.1 F F4(SIGHUP)4.545 E F5(.)A F0 2.045(Before e)6.545 F 2.045(xiting, an interacti)-.15 F 2.345 -.15(ve s)-.25 H 2.045(hell resends the).15 F F4(SIGHUP)108 451.2 Q F0 1.004(to all jobs, running or stopped.)3.254 F 1.004 (Stopped jobs are sent)6.004 F F4(SIGCONT)3.505 E F0 1.005 (to ensure that the)3.255 F 3.505(yr)-.15 G(ecei)-3.505 E 1.305 -.15 (ve t)-.25 H(he).15 E F4(SIGHUP)108 463.2 Q F5(.)A F0 2.53 -.8(To p)5.43 H(re).8 E -.15(ve)-.25 G .93(nt the shell from sending the signal to a \ particular job, it should be remo).15 F -.15(ve)-.15 G 3.429(df).15 G .929(rom the)-3.429 F 1.356(jobs table with the)108 475.2 R F1(diso) 3.856 E(wn)-.1 E F0 -.2(bu)3.856 G 1.356(iltin \(see).2 F F4 1.356 (SHELL B)3.856 F(UIL)-.09 E 1.356(TIN COMMANDS)-.828 F F0(belo)3.607 E 1.357(w\) or mark)-.25 F 1.357(ed to not recei)-.1 F -.15(ve)-.25 G F4 (SIGHUP)108 487.2 Q F0(using)2.25 E F1(diso)2.5 E(wn \255h)-.1 E F0(.)A .166(If the)108 504 R F1(huponexit)2.666 E F0 .166 (shell option has been set with)2.666 F F1(shopt)2.666 E F0(,)A F1(bash) 2.666 E F0 .166(sends a)2.666 F F4(SIGHUP)2.666 E F0 .166 (to all jobs when an interacti)2.416 F -.15(ve)-.25 G(login shell e)108 516 Q(xits.)-.15 E(If)108 532.8 Q F1(bash)3.046 E F0 .546(is w)3.046 F .546(aiting for a command to complete and recei)-.1 F -.15(ve)-.25 G 3.046(sas).15 G .546(ignal for which a trap has been set, the trap) -3.046 F .663(will not be e)108 544.8 R -.15(xe)-.15 G .663 (cuted until the command completes.).15 F(When)5.663 E F1(bash)3.163 E F0 .662(is w)3.163 F .662(aiting for an asynchronous command)-.1 F .326 (via the)108 556.8 R F1(wait)2.826 E F0 -.2(bu)2.826 G .327(iltin, the \ reception of a signal for which a trap has been set will cause the).2 F F1(wait)2.827 E F0 -.2(bu)2.827 G .327(iltin to re-).2 F (turn immediately with an e)108 568.8 Q (xit status greater than 128, immediately after which the trap is e)-.15 E -.15(xe)-.15 G(cuted.).15 E F2(JOB CONTR)72 585.6 Q(OL)-.329 E F3 -.25 (Jo)108 597.6 S 3.369(bc).25 G(ontr)-3.369 E(ol)-.45 E F0 .868 (refers to the ability to selecti)3.879 F -.15(ve)-.25 G .868 (ly stop \().15 F F3(suspend)A F0 3.368(\)t)C .868(he e)-3.368 F -.15 (xe)-.15 G .868(cution of processes and continue \().15 F F3 -.37(re)C (-).37 E(sume)108 609.6 Q F0 2.664(\)t)C .164(heir e)-2.664 F -.15(xe) -.15 G .164(cution at a later point.).15 F 2.665(Au)5.165 G .165 (ser typically emplo)-2.665 F .165(ys this f)-.1 F .165 (acility via an interacti)-.1 F .465 -.15(ve i)-.25 H(nterf).15 E .165 (ace sup-)-.1 F(plied jointly by the operating system k)108 621.6 Q (ernel')-.1 E 2.5(st)-.55 G(erminal dri)-2.5 E -.15(ve)-.25 G 2.5(ra).15 G(nd)-2.5 E F1(bash)2.5 E F0(.)A .785(The shell associates a)108 638.4 R F3(job)5.025 E F0 .785(with each pipeline.)3.515 F .784(It k)5.785 F .784(eeps a table of currently e)-.1 F -.15(xe)-.15 G .784 (cuting jobs, which may be).15 F .324(listed with the)108 650.4 R F1 (jobs)2.824 E F0 2.824(command. When)2.824 F F1(bash)2.825 E F0 .325 (starts a job asynchronously \(in the)2.825 F F3(bac)3.095 E(kgr)-.2 E (ound)-.45 E F0 .325(\), it prints a line).77 F(that looks lik)108 662.4 Q(e:)-.1 E([1] 25647)144 679.2 Q .241(indicating that this job is job n\ umber 1 and that the process ID of the last process in the pipeline ass\ ociated)108 696 R .732(with this job is 25647.)108 708 R .733 (All of the processes in a single pipeline are members of the same job) 5.732 F(.)-.4 E F1(Bash)5.733 E F0(uses)3.233 E(the)108 720 Q F3(job) 4.24 E F0(abstraction as the basis for job control.)2.73 E(GNU Bash 5.1) 72 768 Q(2020 October 29)141.235 E(37)190.395 E 0 Cg EP %%Page: 38 38 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E 1.982 -.8(To f)108 84 T .382(acilitate the implementation of the user interf).7 F .382 (ace to job control, the operating system maintains the no-)-.1 F 1.537 (tion of a)108 96 R/F1 10/Times-Italic@0 SF(curr)4.037 E 1.537 (ent terminal pr)-.37 F 1.537(ocess gr)-.45 F 1.537(oup ID)-.45 F F0 6.537(.M)C 1.538(embers of this process group \(processes whose process) -6.537 F .023 (group ID is equal to the current terminal process group ID\) recei)108 108 R .323 -.15(ve k)-.25 H -.15(ey).05 G .023 (board-generated signals such as).15 F/F2 9/Times-Bold@0 SF(SIG-)2.522 E (INT)108 120 Q/F3 9/Times-Roman@0 SF(.)A F0 1.215 (These processes are said to be in the)5.715 F F1(for)5.685 E -.4(eg) -.37 G -.45(ro).4 G(und).45 E F0(.).77 E F1(Bac)6.795 E(kgr)-.2 E(ound) -.45 E F0 1.216(processes are those whose process)4.485 F .146 (group ID dif)108 132 R .146(fers from the terminal')-.25 F .146 (s; such processes are immune to k)-.55 F -.15(ey)-.1 G .145 (board-generated signals.).15 F .145(Only fore-)5.145 F .16 (ground processes are allo)108 144 R .16(wed to read from or)-.25 F 2.66 (,i)-.4 G 2.66(ft)-2.66 G .16(he user so speci\214es with)-2.66 F/F4 10 /Courier@0 SF .16(stty tostop)2.66 F F0 2.66(,w)C .16(rite to the ter) -2.66 F(-)-.2 E 3.052(minal. Background)108 156 R .551 (processes which attempt to read from \(write to when)3.052 F F4 .551 (stty tostop)3.051 F F0 .551(is in ef)3.051 F .551(fect\) the)-.25 F .717(terminal are sent a)108 168 R F2 .717(SIGTTIN \(SIGTT)3.217 F(OU\)) -.162 E F0 .718(signal by the k)2.967 F(ernel')-.1 E 3.218(st)-.55 G .718(erminal dri)-3.218 F -.15(ve)-.25 G 1.518 -.4(r, w).15 H .718 (hich, unless caught, sus-).4 F(pends the process.)108 180 Q 1.088 (If the operating system on which)108 196.8 R/F5 10/Times-Bold@0 SF (bash)3.588 E F0 1.088(is running supports job control,)3.588 F F5(bash) 3.587 E F0 1.087(contains f)3.587 F 1.087(acilities to use it.)-.1 F -.8 (Ty)108 208.8 S .301(ping the).8 F F1(suspend)3.141 E F0 .301 (character \(typically)3.571 F F5(^Z)2.801 E F0 2.801(,C)C .301 (ontrol-Z\) while a process is running causes that process to be)-2.801 F 2.143(stopped and returns control to)108 220.8 R F5(bash)4.642 E F0 7.142(.T)C 2.142(yping the)-7.942 F F1 2.142(delayed suspend)4.992 F F0 2.142(character \(typically)5.412 F F5(^Y)4.642 E F0 4.642(,C)C (ontrol-Y\))-4.642 E .021(causes the process to be stopped when it atte\ mpts to read input from the terminal, and control to be returned)108 232.8 R(to)108 244.8 Q F5(bash)3.392 E F0 5.892(.T)C .892 (he user may then manipulate the state of this job, using the)-5.892 F F5(bg)3.392 E F0 .892(command to continue it in the)3.392 F .17 (background, the)108 256.8 R F5(fg)2.67 E F0 .17 (command to continue it in the fore)2.67 F .17(ground, or the)-.15 F F5 (kill)2.67 E F0 .17(command to kill it.)2.67 F(A)5.17 E F5(^Z)2.67 E F0 (tak)2.67 E .17(es ef-)-.1 F 1.419(fect immediately)108 268.8 R 3.919 (,a)-.65 G 1.418(nd has the additional side ef)-3.919 F 1.418 (fect of causing pending output and typeahead to be dis-)-.25 F(carded.) 108 280.8 Q .777(There are a number of w)108 297.6 R .777 (ays to refer to a job in the shell.)-.1 F .777(The character)5.777 F F5 (%)3.277 E F0 .777(introduces a job speci\214cation)3.277 F(\()108 309.6 Q F1(jobspec)A F0 3.458(\). Job)B(number)3.458 E F1(n)3.818 E F0 .957 (may be referred to as)3.697 F F5(%n)3.457 E F0 5.957(.A)C .957 (job may also be referred to using a pre\214x of the)-2.5 F .59(name us\ ed to start it, or using a substring that appears in its command line.) 108 321.6 R -.15(Fo)5.59 G 3.09(re).15 G(xample,)-3.24 E F5(%ce)3.09 E F0 .59(refers to a)3.09 F .385(stopped job whose command name be)108 333.6 R .385(gins with)-.15 F F5(ce)2.885 E F0 5.385(.I)C 2.885(fap) -5.385 G .385(re\214x matches more than one job,)-2.885 F F5(bash)2.885 E F0 .385(reports an)2.885 F(error)108 345.6 Q 5.194(.U)-.55 G(sing) -5.194 E F5(%?ce)2.694 E F0 2.694(,o)C 2.694(nt)-2.694 G .194 (he other hand, refers to an)-2.694 F 2.694(yj)-.15 G .194 (ob containing the string)-2.694 F F5(ce)2.694 E F0 .194 (in its command line.)2.694 F .194(If the)5.194 F .306 (substring matches more than one job,)108 357.6 R F5(bash)2.806 E F0 .306(reports an error)2.806 F 5.306(.T)-.55 G .306(he symbols)-5.306 F F5(%%)2.806 E F0(and)2.806 E F5(%+)2.806 E F0 .306(refer to the shell') 2.806 F(s)-.55 E .132(notion of the)108 369.6 R F1(curr)2.832 E .133 (ent job)-.37 F F0 2.633(,w).23 G .133 (hich is the last job stopped while it w)-2.633 F .133(as in the fore) -.1 F .133(ground or started in the back-)-.15 F 2.576(ground. The)108 381.6 R F1(pr)3.826 E -.15(ev)-.37 G .076(ious job).15 F F0 .076 (may be referenced using)2.806 F F5<25ad>2.576 E F0 5.076(.I)C 2.576(ft) -5.076 G .075(here is only a single job,)-2.576 F F5(%+)2.575 E F0(and) 2.575 E F5<25ad>2.575 E F0 .075(can both)2.575 F .317 (be used to refer to that job)108 393.6 R 5.317(.I)-.4 G 2.817(no)-5.317 G .317(utput pertaining to jobs \(e.g., the output of the)-2.817 F F5 (jobs)2.817 E F0 .317(command\), the current)2.817 F .033(job is al)108 405.6 R -.1(wa)-.1 G .033(ys \215agged with a).1 F F5(+)2.533 E F0 2.533 (,a)C .033(nd the pre)-2.533 F .033(vious job with a)-.25 F F52.533 E F0 5.033(.A)C .033(single % \(with no accompan)-2.5 F .032 (ying job speci-)-.15 F(\214cation\) also refers to the current job)108 417.6 Q(.)-.4 E .443 (Simply naming a job can be used to bring it into the fore)108 434.4 R (ground:)-.15 E F5(%1)2.944 E F0 .444(is a synon)2.944 F .444(ym for) -.15 F F5 -.63(``)2.944 G .444(fg %1').63 F(')-.63 E F0 2.944(,b)C (ringing)-2.944 E 1.473(job 1 from the background into the fore)108 446.4 R 3.973(ground. Similarly)-.15 F(,)-.65 E F5 -.63(``)3.972 G 1.472 (%1 &').63 F(')-.63 E F0 1.472(resumes job 1 in the background,)3.972 F (equi)108 458.4 Q -.25(va)-.25 G(lent to).25 E F5 -.63(``)2.5 G(bg %1') .63 E(')-.63 E F0(.)A .13(The shell learns immediately whene)108 475.2 R -.15(ve)-.25 G 2.63(raj).15 G .13(ob changes state.)-2.63 F(Normally) 5.131 E(,)-.65 E F5(bash)2.631 E F0 -.1(wa)2.631 G .131 (its until it is about to print a).1 F .158 (prompt before reporting changes in a job')108 487.2 R 2.658(ss)-.55 G .158(tatus so as to not interrupt an)-2.658 F 2.657(yo)-.15 G .157 (ther output.)-2.657 F .157(If the)5.157 F F52.657 E F0 .157 (option to)2.657 F(the)108 499.2 Q F5(set)2.647 E F0 -.2(bu)2.647 G .147 (iltin command is enabled,).2 F F5(bash)2.647 E F0 .148 (reports such changes immediately)2.648 F 5.148(.A)-.65 G .448 -.15 (ny t)-5.148 H .148(rap on).15 F F2(SIGCHLD)2.648 E F0 .148(is e)2.398 F -.15(xe)-.15 G(-).15 E(cuted for each child that e)108 511.2 Q(xits.) -.15 E .033(If an attempt to e)108 528 R(xit)-.15 E F5(bash)2.533 E F0 .033(is made while jobs are stopped \(or)2.533 F 2.532(,i)-.4 G 2.532 (ft)-2.532 G(he)-2.532 E F5(checkjobs)2.532 E F0 .032 (shell option has been enabled)2.532 F 1.002(using the)108 540 R F5 (shopt)3.502 E F0 -.2(bu)3.502 G 1.002 (iltin, running\), the shell prints a w).2 F 1.002 (arning message, and, if the)-.1 F F5(checkjobs)3.503 E F0 1.003 (option is en-)3.503 F .956(abled, lists the jobs and their statuses.) 108 552 R(The)5.955 E F5(jobs)3.455 E F0 .955 (command may then be used to inspect their status.)3.455 F .955(If a) 5.955 F .603(second attempt to e)108 564 R .604 (xit is made without an interv)-.15 F .604 (ening command, the shell does not print another w)-.15 F(arning,)-.1 E (and an)108 576 Q 2.5(ys)-.15 G(topped jobs are terminated.)-2.5 E .645 (When the shell is w)108 592.8 R .645 (aiting for a job or process using the)-.1 F F5(wait)3.144 E F0 -.2(bu) 3.144 G .644(iltin, and job control is enabled,).2 F F5(wait)3.144 E F0 (will)3.144 E .282(return when the job changes state. The)108 604.8 R F5 2.782 E F0 .282(option causes)2.782 F F5(wait)2.782 E F0 .282 (to w)2.782 F .282(ait until the job or process terminates be-)-.1 F (fore returning.)108 616.8 Q/F6 10.95/Times-Bold@0 SF(PR)72 633.6 Q (OMPTING)-.329 E F0 .645(When e)108 645.6 R -.15(xe)-.15 G .645 (cuting interacti).15 F -.15(ve)-.25 G(ly).15 E(,)-.65 E F5(bash)3.145 E F0 .645(displays the primary prompt)3.145 F F2(PS1)3.145 E F0 .645 (when it is ready to read a command,)2.895 F .427 (and the secondary prompt)108 657.6 R F2(PS2)2.927 E F0 .427 (when it needs more input to complete a command.)2.677 F F5(Bash)5.428 E F0(displays)2.928 E F2(PS0)2.928 E F0(after)2.678 E .038 (it reads a command b)108 669.6 R .038(ut before e)-.2 F -.15(xe)-.15 G .038(cuting it.).15 F F5(Bash)5.038 E F0(displays)2.537 E F2(PS4)2.537 E F0 .037(as described abo)2.287 F .337 -.15(ve b)-.15 H .037 (efore tracing each com-).15 F 1.121(mand when the)108 681.6 R F5 3.621 E F0 1.122(option is enabled.)3.621 F F5(Bash)6.122 E F0(allo) 3.622 E 1.122(ws these prompt strings to be customized by inserting a) -.25 F(number of backslash-escaped special characters that are decoded \ as follo)108 693.6 Q(ws:)-.25 E F5(\\a)144 705.6 Q F0 (an ASCII bell character \(07\))180 705.6 Q F5(\\d)144 717.6 Q F0 (the date in "W)180 717.6 Q(eekday Month Date" format \(e.g., "T)-.8 E (ue May 26"\))-.45 E(GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(38) 190.395 E 0 Cg EP %%Page: 39 39 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10/Times-Bold@0 SF(\\D{)144 84 Q/F2 10/Times-Italic@0 SF(format)A F1(})A F0(the)180 96 Q F2(format)3.927 E F0 1.427(is passed to)3.927 F F2(strftime)3.927 E F0 1.427(\(3\) and the result is inserted into the prompt string; an)B (empty)180 108 Q F2(format)2.5 E F0 (results in a locale-speci\214c time representation.)2.5 E (The braces are required)5 E F1(\\e)144 120 Q F0 (an ASCII escape character \(033\))180 120 Q F1(\\h)144 132 Q F0 (the hostname up to the \214rst `.)180 132 Q(')-.7 E F1(\\H)144 144 Q F0 (the hostname)180 144 Q F1(\\j)144 156 Q F0 (the number of jobs currently managed by the shell)180 156 Q F1(\\l)144 168 Q F0(the basename of the shell')180 168 Q 2.5(st)-.55 G(erminal de) -2.5 E(vice name)-.25 E F1(\\n)144 180 Q F0(ne)180 180 Q(wline)-.25 E F1 (\\r)144 192 Q F0(carriage return)180 192 Q F1(\\s)144 204 Q F0 (the name of the shell, the basename of)180 204 Q F1($0)2.5 E F0 (\(the portion follo)2.5 E(wing the \214nal slash\))-.25 E F1(\\t)144 216 Q F0(the current time in 24-hour HH:MM:SS format)180 216 Q F1(\\T) 144 228 Q F0(the current time in 12-hour HH:MM:SS format)180 228 Q F1 (\\@)144 240 Q F0(the current time in 12-hour am/pm format)180 240 Q F1 (\\A)144 252 Q F0(the current time in 24-hour HH:MM format)180 252 Q F1 (\\u)144 264 Q F0(the username of the current user)180 264 Q F1(\\v)144 276 Q F0(the v)180 276 Q(ersion of)-.15 E F1(bash)2.5 E F0 (\(e.g., 2.00\))2.5 E F1(\\V)144 288 Q F0(the release of)180 288 Q F1 (bash)2.5 E F0 2.5(,v)C(ersion + patch le)-2.65 E -.15(ve)-.25 G 2.5 (l\().15 G(e.g., 2.00.0\))-2.5 E F1(\\w)144 300 Q F0 .115(the current w) 180 300 R .115(orking directory)-.1 F 2.615(,w)-.65 G(ith)-2.615 E/F3 9 /Times-Bold@0 SF($HOME)2.615 E F0(abbre)2.365 E .116 (viated with a tilde \(uses the v)-.25 F .116(alue of the)-.25 F F3(PR) 180 312 Q(OMPT_DIR)-.27 E(TRIM)-.36 E F0 -.25(va)2.25 G(riable\)).25 E F1(\\W)144 324 Q F0(the basename of the current w)180 324 Q (orking directory)-.1 E 2.5(,w)-.65 G(ith)-2.5 E F3($HOME)2.5 E F0 (abbre)2.25 E(viated with a tilde)-.25 E F1(\\!)144 336 Q F0 (the history number of this command)180 336 Q F1(\\#)144 348 Q F0 (the command number of this command)180 348 Q F1(\\$)144 360 Q F0 (if the ef)180 360 Q(fecti)-.25 E .3 -.15(ve U)-.25 H(ID is 0, a).15 E F1(#)2.5 E F0 2.5(,o)C(therwise a)-2.5 E F1($)2.5 E(\\)144 372 Q F2(nnn) A F0(the character corresponding to the octal number)180 372 Q F2(nnn) 2.5 E F1(\\\\)144 384 Q F0 2.5(ab)180 384 S(ackslash)-2.5 E F1(\\[)144 396 Q F0(be)180 396 Q 1.257(gin a sequence of non-printing characters, \ which could be used to embed a terminal)-.15 F (control sequence into the prompt)180 408 Q F1(\\])144 420 Q F0 (end a sequence of non-printing characters)180 420 Q .119 (The command number and the history number are usually dif)108 436.8 R .12(ferent: the history number of a command is its)-.25 F .547(position\ in the history list, which may include commands restored from the hist\ ory \214le \(see)108 448.8 R F3(HIST)3.046 E(OR)-.162 E(Y)-.315 E F0 (be-)2.796 E(lo)108 460.8 Q .354(w\), while the command number is the p\ osition in the sequence of commands e)-.25 F -.15(xe)-.15 G .355 (cuted during the current).15 F .823(shell session.)108 472.8 R .822 (After the string is decoded, it is e)5.823 F .822 (xpanded via parameter e)-.15 F .822(xpansion, command substitution,) -.15 F .682(arithmetic e)108 484.8 R .682(xpansion, and quote remo)-.15 F -.25(va)-.15 G .682(l, subject to the v).25 F .683(alue of the)-.25 F F1(pr)3.183 E(omptv)-.18 E(ars)-.1 E F0 .683(shell option \(see the de-) 3.183 F 1.198(scription of the)108 496.8 R F1(shopt)3.698 E F0 1.198 (command under)3.698 F F3 1.197(SHELL B)3.697 F(UIL)-.09 E 1.197 (TIN COMMANDS)-.828 F F0(belo)3.447 E 3.697(w\). This)-.25 F 1.197 (can ha)3.697 F 1.497 -.15(ve u)-.2 H(nw).15 E(anted)-.1 E .322(side ef) 108 508.8 R .322(fects if escaped portions of the string appear within \ command substitution or contain characters spe-)-.25 F(cial to w)108 520.8 Q(ord e)-.1 E(xpansion.)-.15 E/F4 10.95/Times-Bold@0 SF(READLINE) 72 537.6 Q F0 .151 (This is the library that handles reading input when using an interacti) 108 549.6 R .45 -.15(ve s)-.25 H .15(hell, unless the).15 F F1 (\255\255noediting)2.65 E F0(option)2.65 E .384(is gi)108 561.6 R -.15 (ve)-.25 G 2.884(na).15 G 2.884(ts)-2.884 G .384(hell in)-2.884 F -.2 (vo)-.4 G 2.884(cation. Line).2 F .384 (editing is also used when using the)2.884 F F12.885 E F0 .385 (option to the)2.885 F F1 -.18(re)2.885 G(ad).18 E F0 -.2(bu)2.885 G 2.885(iltin. By).2 F(de-)2.885 E -.1(fa)108 573.6 S 1.407 (ult, the line editing commands are similar to those of Emacs.).1 F 3.906(Av)6.406 G 1.406(i-style line editing interf)-3.906 F 1.406 (ace is also)-.1 F -.2(av)108 585.6 S 3.35(ailable. Line)-.05 F .85 (editing can be enabled at an)3.35 F 3.35(yt)-.15 G .85(ime using the) -3.35 F F1 .85(\255o emacs)3.35 F F0(or)3.35 E F1 .85(\255o vi)3.35 F F0 .85(options to the)3.35 F F1(set)3.35 E F0 -.2(bu)3.35 G(iltin).2 E (\(see)108 597.6 Q F3 .763(SHELL B)3.263 F(UIL)-.09 E .763(TIN COMMANDS) -.828 F F0(belo)3.013 E 3.263(w\). T)-.25 F 3.263(ot)-.8 G .763(urn of) -3.263 F 3.263(fl)-.25 G .763 (ine editing after the shell is running, use the)-3.263 F F1(+o)3.262 E (emacs)108 609.6 Q F0(or)2.5 E F1(+o vi)2.5 E F0(options to the)2.5 E F1 (set)2.5 E F0 -.2(bu)2.5 G(iltin.).2 E F1(Readline Notation)87 626.4 Q F0 .463(In this section, the Emacs-style notation is used to denote k) 108 638.4 R -.15(ey)-.1 G(strok).15 E 2.963(es. Control)-.1 F -.1(ke) 2.963 G .463(ys are denoted by C\255)-.05 F F2 -.1(ke)C(y)-.2 E F0(,)A 1.153(e.g., C\255n means Control\255N.)108 650.4 R(Similarly)6.153 E(,) -.65 E F2(meta)4.033 E F0 -.1(ke)3.913 G 1.153(ys are denoted by M\255) -.05 F F2 -.1(ke)C(y)-.2 E F0 3.652(,s)C 3.652(oM)-3.652 G 1.152 (\255x means Meta\255X.)-3.652 F(\(On)6.152 E -.1(ke)108 662.4 S .83 (yboards without a)-.05 F F2(meta)3.71 E F0 -.1(ke)3.59 G 2.13 -.65 (y, M)-.05 H.65 E F2(x)A F0 .83(means ESC)3.33 F F2(x)3.33 E F0 3.33 (,i)C .831(.e., press the Escape k)-3.33 F 1.131 -.15(ey t)-.1 H .831 (hen the).15 F F2(x)4.101 E F0 -.1(ke)3.861 G 4.631 -.65(y. T)-.05 H .831(his mak).65 F(es)-.1 E .6(ESC the)108 674.4 R F2 .6(meta pr)3.1 F (e\214x)-.37 E F0 5.6(.T)C .6(he combination M\255C\255)-5.6 F F2(x)A F0 .599(means ESC\255Control\255)3.099 F F2(x)A F0 3.099(,o)C 3.099(rp) -3.099 G .599(ress the Escape k)-3.099 F .899 -.15(ey t)-.1 H .599 (hen hold).15 F(the Control k)108 686.4 Q .3 -.15(ey w)-.1 H (hile pressing the).15 E F2(x)3.27 E F0 -.1(ke)3.03 G -.65(y.)-.05 G(\)) .65 E .595(Readline commands may be gi)108 703.2 R -.15(ve)-.25 G 3.096 (nn).15 G(umeric)-3.096 E F2(ar)3.426 E(guments)-.37 E F0 3.096(,w).27 G .596(hich normally act as a repeat count.)-3.096 F(Sometimes,)5.596 E (ho)108 715.2 Q(we)-.25 E -.15(ve)-.25 G 1.419 -.4(r, i).15 H 3.119(ti) .4 G 3.119(st)-3.119 G .619(he sign of the ar)-3.119 F .619 (gument that is signi\214cant.)-.18 F -.15(Pa)5.619 G .619(ssing a ne) .15 F -.05(ga)-.15 G(ti).05 E .919 -.15(ve a)-.25 H -.18(rg).15 G .619 (ument to a command that).18 F 2.938(acts in the forw)108 727.2 R 2.938 (ard direction \(e.g.,)-.1 F F1(kill\255line)5.438 E F0 5.438(\)c)C 2.938(auses that command to act in a backw)-5.438 F 2.938 (ard direction.)-.1 F(GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E (39)190.395 E 0 Cg EP %%Page: 40 40 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E (Commands whose beha)108 84 Q(vior with ar)-.2 E(guments de)-.18 E (viates from this are noted belo)-.25 E -.65(w.)-.25 G .812 (When a command is described as)108 100.8 R/F1 10/Times-Italic@0 SF (killing)3.311 E F0(te)3.311 E .811(xt, the te)-.15 F .811 (xt deleted is sa)-.15 F -.15(ve)-.2 G 3.311(df).15 G .811 (or possible future retrie)-3.311 F -.25(va)-.25 G 3.311(l\().25 G F1 (yank-)-3.311 E(ing)108 112.8 Q F0 2.529(\). The)B .029(killed te)2.529 F .029(xt is sa)-.15 F -.15(ve)-.2 G 2.529(di).15 G 2.529(na)-2.529 G F1 .029(kill ring)B F0 5.029(.C)C(onsecuti)-5.029 E .329 -.15(ve k)-.25 H .029(ills cause the te).15 F .029(xt to be accumulated into one unit,) -.15 F .567(which can be yank)108 124.8 R .567(ed all at once.)-.1 F .567(Commands which do not kill te)5.567 F .567 (xt separate the chunks of te)-.15 F .567(xt on the kill)-.15 F(ring.) 108 136.8 Q/F2 10/Times-Bold@0 SF(Readline Initialization)87 153.6 Q F0 .091(Readline is customized by putting commands in an initialization \ \214le \(the)108 165.6 R F1(inputr)2.591 E(c)-.37 E F0 2.591 (\214le\). The)2.591 F .092(name of this \214le)2.591 F .573(is tak)108 177.6 R .573(en from the v)-.1 F .573(alue of the)-.25 F/F3 9 /Times-Bold@0 SF(INPUTRC)3.073 E F0 -.25(va)2.823 G 3.073(riable. If).25 F .573(that v)3.073 F .573(ariable is unset, the def)-.25 F .573 (ault is)-.1 F F1(~/.inputr)2.573 E(c)-.37 E F0 5.572(.I).31 G 3.072(ft) -5.572 G(hat)-3.072 E 3.061(\214le does)108 189.6 R .561(not e)3.061 F .562(xist or cannot be read, the ultimate def)-.15 F .562(ault is)-.1 F F1(/etc/inputr)4.212 E(c)-.37 E F0 5.562(.W).31 G .562 (hen a program which uses the)-5.562 F .175(readline library starts up,\ the initialization \214le is read, and the k)108 201.6 R .474 -.15 (ey b)-.1 H .174(indings and v).15 F .174(ariables are set.)-.25 F .174 (There are)5.174 F .238(only a fe)108 213.6 R 2.738(wb)-.25 G .238 (asic constructs allo)-2.738 F .239 (wed in the readline initialization \214le.)-.25 F .239 (Blank lines are ignored.)5.239 F .239(Lines be)5.239 F(gin-)-.15 E .554 (ning with a)108 225.6 R F2(#)3.054 E F0 .554(are comments.)3.054 F .554 (Lines be)5.554 F .554(ginning with a)-.15 F F2($)3.054 E F0 .554 (indicate conditional constructs.)3.054 F .553(Other lines denote)5.553 F -.1(ke)108 237.6 S 2.5(yb)-.05 G(indings and v)-2.5 E (ariable settings.)-.25 E .986(The def)108 254.4 R .986(ault k)-.1 F -.15(ey)-.1 G .987(-bindings may be changed with an).15 F F1(inputr) 3.497 E(c)-.37 E F0 3.487(\214le. Other)3.797 F .987 (programs that use this library may)3.487 F(add their o)108 266.4 Q (wn commands and bindings.)-.25 E -.15(Fo)108 283.2 S 2.5(re).15 G (xample, placing)-2.65 E(M\255Control\255u: uni)144 300 Q -.15(ve)-.25 G (rsal\255ar).15 E(gument)-.18 E(or)108 312 Q(C\255Meta\255u: uni)144 324 Q -.15(ve)-.25 G(rsal\255ar).15 E(gument)-.18 E(into the)108 336 Q F1 (inputr)2.51 E(c)-.37 E F0 -.1(wo)2.81 G(uld mak).1 E 2.5(eM)-.1 G (\255C\255u e)-2.5 E -.15(xe)-.15 G(cute the readline command).15 E F1 (univer)2.58 E(sal\255ar)-.1 E(gument)-.37 E F0(.).68 E 1.011(The follo) 108 352.8 R 1.011(wing symbolic character names are recognized:)-.25 F F1 -.4(RU)3.511 G(BOUT).4 E F0(,)1.27 E F1(DEL)4.091 E F0(,).53 E F1 (ESC)4.021 E F0(,).72 E F1(LFD)4.091 E F0(,).28 E F1(NEWLINE)4.21 E F0 (,).73 E F1(RET)4.14 E F0(,)1.27 E F1(RETURN)108.63 364.8 Q F0(,)1.1 E F1(SPC)2.83 E F0(,).72 E F1(SP)2.83 E -.3(AC)-.9 G(E).3 E F0 2.5(,a).73 G(nd)-2.5 E F1 -.5(TA)2.5 G(B).5 E F0(.).27 E .209 (In addition to command names, readline allo)108 381.6 R .209(ws k)-.25 F -.15(ey)-.1 G 2.709(st).15 G 2.709(ob)-2.709 G 2.709(eb)-2.709 G .209 (ound to a string that is inserted when the k)-2.709 F .509 -.15(ey i) -.1 H(s).15 E(pressed \(a)108 393.6 Q F1(macr)2.5 E(o)-.45 E F0(\).)A F2 (Readline K)87 410.4 Q(ey Bindings)-.25 E F0 .366 (The syntax for controlling k)108 422.4 R .666 -.15(ey b)-.1 H .366 (indings in the).15 F F1(inputr)2.876 E(c)-.37 E F0 .366 (\214le is simple.)3.176 F .366(All that is required is the name of the) 5.366 F .263(command or the te)108 434.4 R .264(xt of a macro and a k) -.15 F .564 -.15(ey s)-.1 H .264(equence to which it should be bound.) .15 F .264(The name may be speci-)5.264 F .139(\214ed in one of tw)108 446.4 R 2.638(ow)-.1 G .138(ays: as a symbolic k)-2.738 F .438 -.15 (ey n)-.1 H .138(ame, possibly with).15 F F1(Meta\255)2.638 E F0(or) 2.638 E F1(Contr)2.638 E(ol\255)-.45 E F0(pre\214x)2.638 E .138 (es, or as a k)-.15 F .438 -.15(ey s)-.1 H(e-).15 E(quence.)108 458.4 Q .16(When using the form)108 475.2 R F2 -.1(ke)2.66 G(yname).1 E F0(:)A F1(function\255name).833 E F0(or)2.66 E F1(macr)2.66 E(o)-.45 E F0(,)A F1 -.1(ke)2.66 G(yname)-.2 E F0 .161(is the name of a k)2.84 F .461 -.15 (ey s)-.1 H .161(pelled out in Eng-).15 F 2.5(lish. F)108 487.2 R(or e) -.15 E(xample:)-.15 E(Control-u: uni)144 511.2 Q -.15(ve)-.25 G (rsal\255ar).15 E(gument)-.18 E(Meta-Rubout: backw)144 523.2 Q (ard-kill-w)-.1 E(ord)-.1 E(Control-o: "> output")144 535.2 Q .699 (In the abo)108 552 R .998 -.15(ve ex)-.15 H(ample,).15 E F1(C\255u) 3.038 E F0 .698(is bound to the function)3.448 F F2(uni)3.198 E -.1(ve) -.1 G(rsal\255ar).1 E(gument)-.1 E F0(,)A F1(M\255DEL)3.878 E F0 .698 (is bound to the func-)3.728 F(tion)108 564 Q F2(backward\255kill\255w) 2.758 E(ord)-.1 E F0 2.758(,a)C(nd)-2.758 E F1(C\255o)2.598 E F0 .258 (is bound to run the macro e)2.938 F .259 (xpressed on the right hand side \(that is, to)-.15 F(insert the te)108 576 Q(xt)-.15 E/F4 10/Courier@0 SF 6(>o)2.5 G(utput)-6 E F0 (into the line\).)2.5 E .056(In the second form,)108 592.8 R F2("k)2.556 E(eyseq")-.1 E F0(:)A F1(function\255name).833 E F0(or)2.556 E F1(macr) 2.556 E(o)-.45 E F0(,)A F2 -.1(ke)2.556 G(yseq).1 E F0(dif)2.555 E .055 (fers from)-.25 F F2 -.1(ke)2.555 G(yname).1 E F0(abo)2.555 E .355 -.15 (ve i)-.15 H 2.555(nt).15 G .055(hat strings)-2.555 F 1.284 (denoting an entire k)108 604.8 R 1.584 -.15(ey s)-.1 H 1.284(equence m\ ay be speci\214ed by placing the sequence within double quotes.).15 F (Some)6.284 E .386(GNU Emacs style k)108 616.8 R .686 -.15(ey e)-.1 H .385(scapes can be used, as in the follo).15 F .385(wing e)-.25 F .385 (xample, b)-.15 F .385(ut the symbolic character names)-.2 F (are not recognized.)108 628.8 Q("\\C\255u": uni)144 652.8 Q -.15(ve) -.25 G(rsal\255ar).15 E(gument)-.18 E ("\\C\255x\\C\255r": re\255read\255init\255\214le)144 664.8 Q ("\\e[11~": "Function K)144 676.8 Q .3 -.15(ey 1)-.25 H(").15 E .314 (In this e)108 693.6 R(xample,)-.15 E F1(C\255u)2.654 E F0 .314(is ag) 3.064 F .315(ain bound to the function)-.05 F F2(uni)2.815 E -.1(ve)-.1 G(rsal\255ar).1 E(gument)-.1 E F0(.)A F1 .315(C\255x C\255r)5.155 F F0 .315(is bound to the func-)3.545 F(tion)108 705.6 Q F2 -.18(re)2.5 G .18 E(ead\255init\255\214le)-.18 E F0 2.5(,a)C(nd)-2.5 E F1 (ESC [ 1 1 ~)3.01 E F0(is bound to insert the te)3.94 E(xt)-.15 E F4 (Function Key 1)2.5 E F0(.)A (The full set of GNU Emacs style escape sequences is)108 722.4 Q (GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(40)190.395 E 0 Cg EP %%Page: 41 41 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10/Times-Bold@0 SF<5c43ad>144 84 Q F0(control pre\214x)180 84 Q F1<5c4dad>144 96 Q F0 (meta pre\214x)180 96 Q F1(\\e)144 108 Q F0(an escape character)180 108 Q F1(\\\\)144 120 Q F0(backslash)180 120 Q F1(\\")144 132 Q F0 (literal ")180 132 Q F1<5c08>144 144 Q F0(literal \010)180 144 Q(In add\ ition to the GNU Emacs style escape sequences, a second set of backslas\ h escapes is a)108 160.8 Q -.25(va)-.2 G(ilable:).25 E F1(\\a)144 172.8 Q F0(alert \(bell\))180 172.8 Q F1(\\b)144 184.8 Q F0(backspace)180 184.8 Q F1(\\d)144 196.8 Q F0(delete)180 196.8 Q F1(\\f)144 208.8 Q F0 (form feed)180 208.8 Q F1(\\n)144 220.8 Q F0(ne)180 220.8 Q(wline)-.25 E F1(\\r)144 232.8 Q F0(carriage return)180 232.8 Q F1(\\t)144 244.8 Q F0 (horizontal tab)180 244.8 Q F1(\\v)144 256.8 Q F0 -.15(ve)180 256.8 S (rtical tab).15 E F1(\\)144 268.8 Q/F2 10/Times-Italic@0 SF(nnn)A F0 (the eight-bit character whose v)180 268.8 Q(alue is the octal v)-.25 E (alue)-.25 E F2(nnn)2.5 E F0(\(one to three digits\))2.5 E F1(\\x)144 280.8 Q F2(HH)A F0(the eight-bit character whose v)180 280.8 Q (alue is the he)-.25 E(xadecimal v)-.15 E(alue)-.25 E F2(HH)2.5 E F0 (\(one or tw)2.5 E 2.5(oh)-.1 G .3 -.15(ex d)-2.5 H(igits\)).15 E 1.142 (When entering the te)108 297.6 R 1.141(xt of a macro, single or double\ quotes must be used to indicate a macro de\214nition.)-.15 F .089 (Unquoted te)108 309.6 R .089(xt is assumed to be a function name.)-.15 F .09(In the macro body)5.089 F 2.59(,t)-.65 G .09 (he backslash escapes described abo)-2.59 F -.15(ve)-.15 G(are e)108 321.6 Q 2.5(xpanded. Backslash)-.15 F(will quote an)2.5 E 2.5(yo)-.15 G (ther character in the macro te)-2.5 E(xt, including " and \010.)-.15 E F1(Bash)108 338.4 Q F0(allo)2.93 E .43(ws the current readline k)-.25 F .73 -.15(ey b)-.1 H .429(indings to be displayed or modi\214ed with the) .15 F F1(bind)2.929 E F0 -.2(bu)2.929 G .429(iltin command.).2 F .045 (The editing mode may be switched during interacti)108 350.4 R .345 -.15 (ve u)-.25 H .046(se by using the).15 F F12.546 E F0 .046 (option to the)2.546 F F1(set)2.546 E F0 -.2(bu)2.546 G .046 (iltin command).2 F(\(see)108 362.4 Q/F3 9/Times-Bold@0 SF(SHELL B)2.5 E (UIL)-.09 E(TIN COMMANDS)-.828 E F0(belo)2.25 E(w\).)-.25 E F1 (Readline V)87 379.2 Q(ariables)-.92 E F0 .044(Readline has v)108 391.2 R .043(ariables that can be used to further customize its beha)-.25 F (vior)-.2 E 5.043(.A)-.55 G -.25(va)-2.5 G .043 (riable may be set in the).25 F F2(inpu-)2.553 E(tr)108 403.2 Q(c)-.37 E F0(\214le with a statement of the form)2.81 E F1(set)144 420 Q F2 (variable\255name value)2.5 E F0(or using the)108 432 Q F1(bind)2.5 E F0 -.2(bu)2.5 G(iltin command \(see).2 E F3(SHELL B)2.5 E(UIL)-.09 E (TIN COMMANDS)-.828 E F0(belo)2.25 E(w\).)-.25 E .79 (Except where noted, readline v)108 448.8 R .79(ariables can tak)-.25 F 3.29(et)-.1 G .79(he v)-3.29 F(alues)-.25 E F1(On)3.29 E F0(or)3.29 E F1 (Off)3.29 E F0 .79(\(without re)3.29 F -.05(ga)-.15 G .79(rd to case\).) .05 F(Unrecog-)5.79 E .449(nized v)108 460.8 R .448 (ariable names are ignored.)-.25 F .448(When a v)5.448 F .448(ariable v) -.25 F .448(alue is read, empty or null v)-.25 F .448 (alues, "on" \(case-insensi-)-.25 F(ti)108 472.8 Q -.15(ve)-.25 G .467 (\), and "1" are equi).15 F -.25(va)-.25 G .468(lent to).25 F F1(On) 2.968 E F0 5.468(.A)C .468(ll other v)-5.468 F .468(alues are equi)-.25 F -.25(va)-.25 G .468(lent to).25 F F1(Off)2.968 E F0 5.468(.T)C .468 (he v)-5.468 F .468(ariables and their def)-.25 F(ault)-.1 E -.25(va)108 484.8 S(lues are:).25 E F1(bell\255style \(audible\))108 501.6 Q F0 .011 (Controls what happens when readline w)144 513.6 R .011 (ants to ring the terminal bell.)-.1 F .01(If set to)5.01 F F1(none)2.51 E F0 2.51(,r)C .01(eadline ne)-2.51 F -.15(ve)-.25 G(r).15 E .94 (rings the bell.)144 525.6 R .94(If set to)5.94 F F1(visible)3.44 E F0 3.44(,r)C .94(eadline uses a visible bell if one is a)-3.44 F -.25(va) -.2 G 3.44(ilable. If).25 F .94(set to)3.44 F F1(audible)3.44 E F0(,)A (readline attempts to ring the terminal')144 537.6 Q 2.5(sb)-.55 G(ell.) -2.5 E F1(bind\255tty\255special\255chars \(On\))108 549.6 Q F0 .056 (If set to)144 561.6 R F1(On)2.556 E F0 2.556(,r)C .056(eadline attempt\ s to bind the control characters treated specially by the k)-2.556 F (ernel')-.1 E 2.555(st)-.55 G(ermi-)-2.555 E(nal dri)144 573.6 Q -.15 (ve)-.25 G 2.5(rt).15 G 2.5(ot)-2.5 G(heir readline equi)-2.5 E -.25(va) -.25 G(lents.).25 E F1(blink\255matching\255par)108 585.6 Q(en \(Off\)) -.18 E F0 .21(If set to)144 597.6 R F1(On)2.71 E F0 2.71(,r)C .21 (eadline attempts to brie\215y mo)-2.71 F .51 -.15(ve t)-.15 H .21 (he cursor to an opening parenthesis when a closing).15 F (parenthesis is inserted.)144 609.6 Q F1(color)108 621.6 Q (ed\255completion\255pr)-.18 E(e\214x \(Off\))-.18 E F0 .515(If set to) 144 633.6 R F1(On)3.015 E F0 3.015(,w)C .515(hen listing completions, r\ eadline displays the common pre\214x of the set of possible)-3.015 F 2.935(completions using a dif)144 645.6 R 2.935(ferent color)-.25 F 7.936(.T)-.55 G 2.936(he color de\214nitions are tak)-7.936 F 2.936 (en from the v)-.1 F 2.936(alue of the)-.25 F F1(LS_COLORS)144 657.6 Q F0(en)2.5 E(vironment v)-.4 E(ariable.)-.25 E F1(color)108 669.6 Q (ed\255stats \(Off\))-.18 E F0 1.58(If set to)144 681.6 R F1(On)4.08 E F0 4.08(,r)C 1.579(eadline displays possible completions using dif)-4.08 F 1.579(ferent colors to indicate their \214le)-.25 F 2.5(type. The)144 693.6 R(color de\214nitions are tak)2.5 E(en from the v)-.1 E (alue of the)-.25 E F1(LS_COLORS)2.5 E F0(en)2.5 E(vironment v)-.4 E (ariable.)-.25 E F1(comment\255begin \(`)108 705.6 Q(`#')-.63 E('\))-.63 E F0 .884(The string that is inserted when the readline)144 717.6 R F1 (insert\255comment)3.385 E F0 .885(command is e)3.385 F -.15(xe)-.15 G 3.385(cuted. This).15 F(com-)3.385 E(mand is bound to)144 729.6 Q F1 (M\255#)2.5 E F0(in emacs mode and to)2.5 E F1(#)2.5 E F0 (in vi command mode.)2.5 E(GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(41)190.395 E 0 Cg EP %%Page: 42 42 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10/Times-Bold@0 SF(completion\255display\255width \(\2551\))108 84 Q F0 1.453(The numbe\ r of screen columns used to display possible matches when performing co\ mpletion.)144 96 R .193(The v)144 108 R .193(alue is ignored if it is l\ ess than 0 or greater than the terminal screen width.)-.25 F 2.694(Av) 5.194 G .194(alue of 0 will)-2.944 F (cause matches to be displayed one per line.)144 120 Q(The def)5 E (ault v)-.1 E(alue is \2551.)-.25 E F1(completion\255ignor)108 132 Q (e\255case \(Off\))-.18 E F0(If set to)144 144 Q F1(On)2.5 E F0 2.5(,r)C (eadline performs \214lename matching and completion in a case\255insen\ siti)-2.5 E .3 -.15(ve f)-.25 H(ashion.).05 E F1 (completion\255map\255case \(Off\))108 156 Q F0 .094(If set to)144 168 R F1(On)2.593 E F0 2.593(,a)C(nd)-2.593 E F1(completion\255ignor)2.593 E (e\255case)-.18 E F0 .093(is enabled, readline treats h)2.593 F .093 (yphens \()-.05 F/F2 10/Times-Italic@0 SFA F0 2.593(\)a)C .093 (nd underscores)-2.593 F(\()144 180 Q F2(_)A F0 2.5(\)a)C 2.5(se)-2.5 G (qui)-2.5 E -.25(va)-.25 G(lent when performing case\255insensiti).25 E .3 -.15(ve \214)-.25 H(lename matching and completion.).15 E F1 (completion\255pr)108 192 Q(e\214x\255display\255length \(0\))-.18 E F0 .829(The length in characters of the common pre\214x of a list of possi\ ble completions that is displayed)144 204 R 1.275 (without modi\214cation.)144 216 R 1.275(When set to a v)6.275 F 1.274 (alue greater than zero, common pre\214x)-.25 F 1.274 (es longer than this)-.15 F -.25(va)144 228 S(lue are replaced with an \ ellipsis when displaying possible completions.).25 E F1 (completion\255query\255items \(100\))108 240 Q F0 .529 (This determines when the user is queried about vie)144 252 R .53 (wing the number of possible completions gen-)-.25 F .561(erated by the) 144 264 R F1(possible\255completions)3.061 E F0 3.061(command. It)3.061 F .561(may be set to an)3.061 F 3.06(yi)-.15 G(nte)-3.06 E .56(ger v) -.15 F .56(alue greater than or)-.25 F .782(equal to zero.)144 276 R .783(If the number of possible completions is greater than or equal to \ the v)5.782 F .783(alue of this)-.25 F -.25(va)144 288 S .368 (riable, readline will ask whether or not the user wishes to vie).25 F 2.867(wt)-.25 G .367(hem; otherwise the)-2.867 F 2.867(ya)-.15 G .367 (re simply)-2.867 F(listed on the terminal.)144 300 Q F1(con)108 312 Q -.1(ve)-.4 G(rt\255meta \(On\)).1 E F0 .612(If set to)144 324 R F1(On) 3.112 E F0 3.112(,r)C .613(eadline will con)-3.112 F -.15(ve)-.4 G .613 (rt characters with the eighth bit set to an ASCII k).15 F .913 -.15 (ey s)-.1 H .613(equence by).15 F .541 (stripping the eighth bit and pre\214xing an escape character \(in ef) 144 336 R .541(fect, using escape as the)-.25 F F2 .541(meta pr)3.041 F (e-)-.37 E<8c78>144 348 Q F0 2.5(\). The)B(def)2.5 E(ault is)-.1 E F2 (On)2.5 E F0 2.5(,b)C(ut readline will set it to)-2.7 E F2(Of)2.5 E(f) -.18 E F0(if the locale contains eight-bit characters.)2.5 E F1 (disable\255completion \(Off\))108 360 Q F0 .038(If set to)144 372 R F1 (On)2.538 E F0 2.538(,r)C .038(eadline will inhibit w)-2.538 F .038 (ord completion.)-.1 F .038 (Completion characters will be inserted into the)5.038 F(line as if the) 144 384 Q 2.5(yh)-.15 G(ad been mapped to)-2.5 E F1(self-insert)2.5 E F0 (.)A F1(echo\255contr)108 396 Q(ol\255characters \(On\))-.18 E F0 1.211 (When set to)144 408 R F1(On)3.711 E F0 3.711(,o)C 3.711(no)-3.711 G 1.211(perating systems that indicate the)-3.711 F 3.711(ys)-.15 G 1.21 (upport it, readline echoes a character)-3.711 F (corresponding to a signal generated from the k)144 420 Q -.15(ey)-.1 G (board.).15 E F1(editing\255mode \(emacs\))108 432 Q F0 .141 (Controls whether readline be)144 444 R .141(gins with a set of k)-.15 F .441 -.15(ey b)-.1 H .141(indings similar to).15 F F2(Emacs)2.642 E F0 (or)2.642 E F2(vi)2.642 E F0(.)A F1(editing\255mode)5.142 E F0 (can be set to either)144 456 Q F1(emacs)2.5 E F0(or)2.5 E F1(vi)2.5 E F0(.)A F1(emacs\255mode\255string \(@\))108 468 Q F0 .518(If the)144 480 R F2(show\255mode\255in\255pr)3.018 E(ompt)-.45 E F0 -.25(va)3.018 G .517(riable is enabled, this string is displayed immediately before the) .25 F .622 (last line of the primary prompt when emacs editing mode is acti)144 492 R -.15(ve)-.25 G 5.622(.T).15 G .622(he v)-5.622 F .622(alue is e)-.25 F .622(xpanded lik)-.15 F 3.122(ea)-.1 G -.1(ke)144 504 S 3.34(yb)-.05 G .839(inding, so the standard set of meta- and control pre\214x)-3.34 F .839(es and backslash escape sequences is)-.15 F -.2(av)144 516 S 2.798 (ailable. Use)-.05 F .298(the \\1 and \\2 escapes to be)2.798 F .298 (gin and end sequences of non-printing characters, which)-.15 F (can be used to embed a terminal control sequence into the mode string.) 144 528 Q F1(enable\255brack)108 540 Q(eted\255paste \(On\))-.1 E F0 1.222(When set to)144 552 R F1(On)3.721 E F0 3.721(,r)C 1.221 (eadline will con\214gure the terminal in a w)-3.721 F 1.221 (ay that will enable it to insert each)-.1 F .353 (paste into the editing b)144 564 R(uf)-.2 E .353(fer as a single strin\ g of characters, instead of treating each character as if)-.25 F .544 (it had been read from the k)144 576 R -.15(ey)-.1 G 3.043(board. This) .15 F .543(can pre)3.043 F -.15(ve)-.25 G .543 (nt pasted characters from being interpreted as).15 F(editing commands.) 144 588 Q F1(enable\255k)108 600 Q(eypad \(Off\))-.1 E F0 .892 (When set to)144 612 R F1(On)3.393 E F0 3.393(,r)C .893 (eadline will try to enable the application k)-3.393 F -.15(ey)-.1 G .893(pad when it is called.).15 F .893(Some sys-)5.893 F (tems need this to enable the arro)144 624 Q 2.5(wk)-.25 G -.15(ey)-2.6 G(s.).15 E F1(enable\255meta\255k)108 636 Q(ey \(On\))-.1 E F0 .64 (When set to)144 648 R F1(On)3.14 E F0 3.14(,r)C .64 (eadline will try to enable an)-3.14 F 3.14(ym)-.15 G .64 (eta modi\214er k)-3.14 F .94 -.15(ey t)-.1 H .64 (he terminal claims to support).15 F(when it is called.)144 660 Q (On man)5 E 2.5(yt)-.15 G(erminals, the meta k)-2.5 E .3 -.15(ey i)-.1 H 2.5(su).15 G(sed to send eight-bit characters.)-2.5 E F1 (expand\255tilde \(Off\))108 672 Q F0(If set to)144 684 Q F1(On)2.5 E F0 2.5(,t)C(ilde e)-2.5 E(xpansion is performed when readline attempts w) -.15 E(ord completion.)-.1 E F1(history\255pr)108 696 Q(eser)-.18 E -.1 (ve)-.1 G(\255point \(Off\)).1 E F0 .552(If set to)144 708 R F1(On)3.052 E F0 3.052(,t)C .552(he history code attempts to place point at the sam\ e location on each history line re-)-3.052 F(trie)144 720 Q -.15(ve)-.25 G 2.5(dw).15 G(ith)-2.5 E F1(pr)2.5 E -.15(ev)-.18 G(ious-history).15 E F0(or)2.5 E F1(next-history)2.5 E F0(.)A(GNU Bash 5.1)72 768 Q (2020 October 29)141.235 E(42)190.395 E 0 Cg EP %%Page: 43 43 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10/Times-Bold@0 SF(history\255size \(unset\))108 84 Q F0 .949 (Set the maximum number of history entries sa)144 96 R -.15(ve)-.2 G 3.448(di).15 G 3.448(nt)-3.448 G .948(he history list.)-3.448 F .948 (If set to zero, an)5.948 F 3.448(ye)-.15 G(xisting)-3.598 E .482 (history entries are deleted and no ne)144 108 R 2.982(we)-.25 G .483 (ntries are sa)-2.982 F -.15(ve)-.2 G 2.983(d. If).15 F .483(set to a v) 2.983 F .483(alue less than zero, the num-)-.25 F .278 (ber of history entries is not limited.)144 120 R .277(By def)5.278 F .277(ault, the number of history entries is set to the v)-.1 F .277 (alue of)-.25 F(the)144 132 Q F1(HISTSIZE)3.41 E F0 .91(shell v)3.41 F 3.41(ariable. If)-.25 F .911(an attempt is made to set)3.41 F/F2 10 /Times-Italic@0 SF(history\255size)3.411 E F0 .911(to a non-numeric v) 3.411 F(alue,)-.25 E (the maximum number of history entries will be set to 500.)144 144 Q F1 (horizontal\255scr)108 156 Q(oll\255mode \(Off\))-.18 E F0 .449 (When set to)144 168 R F1(On)2.949 E F0 2.949(,m)C(ak)-2.949 E .448 (es readline use a single line for display)-.1 F 2.948(,s)-.65 G .448 (crolling the input horizontally on a)-2.948 F 1.194(single screen line\ when it becomes longer than the screen width rather than wrapping to a\ ne)144 180 R(w)-.25 E 2.5(line. This)144 192 R (setting is automatically enabled for terminals of height 1.)2.5 E F1 (input\255meta \(Off\))108 204 Q F0 1.062(If set to)144 216 R F1(On) 3.562 E F0 3.562(,r)C 1.061(eadline will enable eight-bit input \(that \ is, it will not strip the eighth bit from the)-3.562 F .335 (characters it reads\), re)144 228 R -.05(ga)-.15 G .335 (rdless of what the terminal claims it can support.).05 F .336(The name) 5.336 F F1(meta\255\215ag)2.836 E F0(is)2.836 E 2.865(as)144 240 S(ynon) -2.865 E .365(ym for this v)-.15 F 2.864(ariable. The)-.25 F(def)2.864 E .364(ault is)-.1 F F2(Of)2.864 E(f)-.18 E F0 2.864(,b)C .364 (ut readline will set it to)-3.064 F F2(On)2.864 E F0 .364 (if the locale contains)2.864 F(eight-bit characters.)144 252 Q F1 (isear)108 264 Q(ch\255terminators \(`)-.18 E(`C\255[C\255J')-.63 E('\)) -.63 E F0 .439(The string of characters that should terminate an increm\ ental search without subsequently e)144 276 R -.15(xe)-.15 G(cut-).15 E .935(ing the character as a command.)144 288 R .935(If this v)5.935 F .935(ariable has not been gi)-.25 F -.15(ve)-.25 G 3.434(nav).15 G .934 (alue, the characters)-3.684 F F2(ESC)3.434 E F0(and)144 300 Q F2 (C\255J)2.5 E F0(will terminate an incremental search.)2.5 E F1 -.1(ke) 108 312 S(ymap \(emacs\)).1 E F0 2.02(Set the current readline k)144 324 R -.15(ey)-.1 G 4.521(map. The).15 F 2.021(set of v)4.521 F 2.021 (alid k)-.25 F -.15(ey)-.1 G 2.021(map names is).15 F F2 2.021 (emacs, emacs\255standar)4.521 F(d,)-.37 E .042 (emacs\255meta, emacs\255ctlx, vi, vi\255command)144 336 R F0 2.542(,a)C (nd)-2.542 E F2(vi\255insert)2.832 E F0(.).68 E F2(vi)5.042 E F0 .042 (is equi)2.542 F -.25(va)-.25 G .042(lent to).25 F F2(vi\255command) 2.541 E F0(;)A F2(emacs)2.541 E F0 .448(is equi)144 348 R -.25(va)-.25 G .448(lent to).25 F F2(emacs\255standar)2.948 E(d)-.37 E F0 5.448(.T)C .448(he def)-5.448 F .448(ault v)-.1 F .449(alue is)-.25 F F2(emacs) 3.139 E F0 2.949(;t).27 G .449(he v)-2.949 F .449(alue of)-.25 F F1 (editing\255mode)2.949 E F0 .449(also af-)2.949 F(fects the def)144 360 Q(ault k)-.1 E -.15(ey)-.1 G(map.).15 E F1 -.1(ke)108 372 S (yseq\255timeout \(500\)).1 E F0 .368(Speci\214es the duration)144 384 R F2 -.37(re)2.867 G(adline).37 E F0 .367(will w)2.867 F .367 (ait for a character when reading an ambiguous k)-.1 F .667 -.15(ey s) -.1 H(equence).15 E .524(\(one that can form a complete k)144 396 R .824 -.15(ey s)-.1 H .524(equence using the input read so f).15 F(ar)-.1 E 3.025(,o)-.4 G 3.025(rc)-3.025 G .525(an tak)-3.025 F 3.025(ea)-.1 G .525(dditional in-)-3.025 F .807(put to complete a longer k)144 408 R 1.106 -.15(ey s)-.1 H 3.306(equence\). If).15 F .806(no input is recei) 3.306 F -.15(ve)-.25 G 3.306(dw).15 G .806(ithin the timeout,)-3.306 F F2 -.37(re)3.306 G(adline).37 E F0(will)3.306 E .906(use the shorter b) 144 420 R .907(ut complete k)-.2 F 1.207 -.15(ey s)-.1 H 3.407 (equence. The).15 F -.25(va)3.407 G .907 (lue is speci\214ed in milliseconds, so a v).25 F .907(alue of)-.25 F .05(1000 means that)144 432 R F2 -.37(re)2.55 G(adline).37 E F0 .05 (will w)2.55 F .05(ait one second for additional input.)-.1 F .05 (If this v)5.05 F .05(ariable is set to a v)-.25 F(alue)-.25 E .051 (less than or equal to zero, or to a non-numeric v)144 444 R(alue,)-.25 E F2 -.37(re)2.551 G(adline).37 E F0 .051(will w)2.551 F .051 (ait until another k)-.1 F .352 -.15(ey i)-.1 H 2.552(sp).15 G(ressed) -2.552 E(to decide which k)144 456 Q .3 -.15(ey s)-.1 H (equence to complete.).15 E F1(mark\255dir)108 468 Q(ectories \(On\)) -.18 E F0(If set to)144 480 Q F1(On)2.5 E F0 2.5(,c)C (ompleted directory names ha)-2.5 E .3 -.15(ve a s)-.2 H(lash appended.) .15 E F1(mark\255modi\214ed\255lines \(Off\))108 492 Q F0(If set to)144 504 Q F1(On)2.5 E F0 2.5(,h)C(istory lines that ha)-2.5 E .3 -.15(ve b) -.2 H(een modi\214ed are displayed with a preceding asterisk \().15 E F1 (*)A F0(\).)A F1(mark\255symlink)108 516 Q(ed\255dir)-.1 E (ectories \(Off\))-.18 E F0 .175(If set to)144 528 R F1(On)2.675 E F0 2.675(,c)C .175 (ompleted names which are symbolic links to directories ha)-2.675 F .475 -.15(ve a s)-.2 H .175(lash appended \(sub-).15 F(ject to the v)144 540 Q(alue of)-.25 E F1(mark\255dir)2.5 E(ectories)-.18 E F0(\).)A F1 (match\255hidden\255\214les \(On\))108 552 Q F0 .192(This v)144 564 R .192(ariable, when set to)-.25 F F1(On)2.692 E F0 2.692(,c)C .192 (auses readline to match \214les whose names be)-2.692 F .193 (gin with a `.)-.15 F 2.693('\()-.7 G(hidden)-2.693 E .457 (\214les\) when performing \214lename completion.)144 576 R .456 (If set to)5.456 F F1(Off)2.956 E F0 2.956(,t)C .456(he leading `.) -2.956 F 2.956('m)-.7 G .456(ust be supplied by the)-2.956 F (user in the \214lename to be completed.)144 588 Q F1 (menu\255complete\255display\255pr)108 600 Q(e\214x \(Off\))-.18 E F0 1.585(If set to)144 612 R F1(On)4.085 E F0 4.085(,m)C 1.585(enu complet\ ion displays the common pre\214x of the list of possible completions) -4.085 F(\(which may be empty\) before c)144 624 Q (ycling through the list.)-.15 E F1(output\255meta \(Off\))108 636 Q F0 .507(If set to)144 648 R F1(On)3.007 E F0 3.007(,r)C .507(eadline will \ display characters with the eighth bit set directly rather than as a me\ ta-)-3.007 F(pre\214x)144 660 Q .884(ed escape sequence.)-.15 F .884 (The def)5.884 F .884(ault is)-.1 F F2(Of)3.384 E(f)-.18 E F0 3.384(,b)C .884(ut readline will set it to)-3.584 F F2(On)3.384 E F0 .885 (if the locale contains)3.384 F(eight-bit characters.)144 672 Q F1 (page\255completions \(On\))108 684 Q F0 .809(If set to)144 696 R F1(On) 3.308 E F0 3.308(,r)C .808(eadline uses an internal)-3.308 F F2(mor) 3.308 E(e)-.37 E F0(-lik)A 3.308(ep)-.1 G .808 (ager to display a screenful of possible comple-)-3.308 F (tions at a time.)144 708 Q(GNU Bash 5.1)72 768 Q(2020 October 29) 141.235 E(43)190.395 E 0 Cg EP %%Page: 44 44 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10/Times-Bold@0 SF(print\255completions\255horizontally \(Off\))108 84 Q F0 .227 (If set to)144 96 R F1(On)2.727 E F0 2.727(,r)C .227(eadline will displ\ ay completions with matches sorted horizontally in alphabetical or) -2.727 F(-)-.2 E(der)144 108 Q 2.5(,r)-.4 G(ather than do)-2.5 E (wn the screen.)-.25 E F1 -2.29 -.18(re v)108 120 T (ert\255all\255at\255newline \(Off\)).08 E F0 .699(If set to)144 132 R F1(On)3.199 E F0 3.199(,r)C .699 (eadline will undo all changes to history lines before returning when) -3.199 F F1(accept\255line)3.198 E F0(is)3.198 E -.15(exe)144 144 S 2.686(cuted. By).15 F(def)2.686 E .186 (ault, history lines may be modi\214ed and retain indi)-.1 F .186 (vidual undo lists across calls to)-.25 F F1 -.18(re)144 156 S(adline) .18 E F0(.)A F1(sho)108 168 Q(w\255all\255if\255ambiguous \(Off\))-.1 E F0 .304(This alters the def)144 180 R .304(ault beha)-.1 F .304 (vior of the completion functions.)-.2 F .304(If set to)5.304 F F1(On) 2.804 E F0 2.803(,w)C .303(ords which ha)-2.903 F .603 -.15(ve m)-.2 H (ore).15 E 1.264(than one possible completion cause the matches to be l\ isted immediately instead of ringing the)144 192 R(bell.)144 204 Q F1 (sho)108 216 Q(w\255all\255if\255unmodi\214ed \(Off\))-.1 E F0 5.346 (This alters the def)144 228 R 5.346(ault beha)-.1 F 5.345 (vior of the completion functions in a f)-.2 F 5.345(ashion similar to) -.1 F F1(sho)144 240 Q(w\255all\255if\255ambiguous)-.1 E F0 6.69(.I)C 4.19(fs)-6.69 G 1.691(et to)-4.19 F F1(On)4.191 E F0 4.191(,w)C 1.691 (ords which ha)-4.291 F 1.991 -.15(ve m)-.2 H 1.691 (ore than one possible completion).15 F 1.04(without an)144 252 R 3.54 (yp)-.15 G 1.039 (ossible partial completion \(the possible completions don')-3.54 F 3.539(ts)-.18 G 1.039(hare a common pre\214x\))-3.539 F(cause the match\ es to be listed immediately instead of ringing the bell.)144 264 Q F1 (sho)108 276 Q(w\255mode\255in\255pr)-.1 E(ompt \(Off\))-.18 E F0 1.021 (If set to)144 288 R F1(On)3.521 E F0 3.521(,a)C 1.022 (dd a string to the be)-3.521 F 1.022 (ginning of the prompt indicating the editing mode: emacs, vi)-.15 F (command, or vi insertion.)144 300 Q(The mode strings are user)5 E (-settable \(e.g.,)-.2 E/F2 10/Times-Italic@0 SF (emacs\255mode\255string)2.5 E F0(\).)A F1 (skip\255completed\255text \(Off\))108 312 Q F0 .095(If set to)144 324 R F1(On)2.595 E F0 2.595(,t)C .095(his alters the def)-2.595 F .095 (ault completion beha)-.1 F .094 (vior when inserting a single match into the line.)-.2 F(It')144 336 Q 2.545(so)-.55 G .045(nly acti)-2.545 F .345 -.15(ve w)-.25 H .046 (hen performing completion in the middle of a w).15 F 2.546(ord. If)-.1 F .046(enabled, readline does not)2.546 F 1.394(insert characters from \ the completion that match characters after point in the w)144 348 R 1.394(ord being com-)-.1 F(pleted, so portions of the w)144 360 Q (ord follo)-.1 E(wing the cursor are not duplicated.)-.25 E F1 (vi\255cmd\255mode\255string \(\(cmd\)\))108 372 Q F0 .517(If the)144 384 R F2(show\255mode\255in\255pr)3.017 E(ompt)-.45 E F0 -.25(va)3.017 G .518(riable is enabled, this string is displayed immediately before the) .25 F .475(last line of the primary prompt when vi editing mode is acti) 144 396 R .775 -.15(ve a)-.25 H .475(nd in command mode.).15 F .475 (The v)5.475 F(alue)-.25 E .33(is e)144 408 R .33(xpanded lik)-.15 F 2.83(eak)-.1 G .63 -.15(ey b)-2.93 H .33 (inding, so the standard set of meta- and control pre\214x).15 F .33 (es and backslash es-)-.15 F .245(cape sequences is a)144 420 R -.25(va) -.2 G 2.745(ilable. Use).25 F .244(the \\1 and \\2 escapes to be)2.745 F .244(gin and end sequences of non-printing)-.15 F(characters, which can\ be used to embed a terminal control sequence into the mode string.)144 432 Q F1(vi\255ins\255mode\255string \(\(ins\)\))108 444 Q F0 .517 (If the)144 456 R F2(show\255mode\255in\255pr)3.017 E(ompt)-.45 E F0 -.25(va)3.017 G .518 (riable is enabled, this string is displayed immediately before the).25 F .186(last line of the primary prompt when vi editing mode is acti)144 468 R .486 -.15(ve a)-.25 H .186(nd in insertion mode.).15 F .186(The v) 5.186 F .186(alue is)-.25 F -.15(ex)144 480 S .923(panded lik).15 F 3.423(eak)-.1 G 1.223 -.15(ey b)-3.523 H .924 (inding, so the standard set of meta- and control pre\214x).15 F .924 (es and backslash es-)-.15 F .245(cape sequences is a)144 492 R -.25(va) -.2 G 2.745(ilable. Use).25 F .244(the \\1 and \\2 escapes to be)2.745 F .244(gin and end sequences of non-printing)-.15 F(characters, which can\ be used to embed a terminal control sequence into the mode string.)144 504 Q F1(visible\255stats \(Off\))108 516 Q F0 .846(If set to)144 528 R F1(On)3.346 E F0 3.346(,ac)C .846(haracter denoting a \214le')-3.346 F 3.346(st)-.55 G .846(ype as reported by)-3.346 F F2(stat)3.346 E F0 .846 (\(2\) is appended to the \214lename)B (when listing possible completions.)144 540 Q F1 (Readline Conditional Constructs)87 556.8 Q F0 .05 (Readline implements a f)108 568.8 R .05(acility similar in spirit to t\ he conditional compilation features of the C preprocessor)-.1 F .096 (which allo)108 580.8 R .096(ws k)-.25 F .396 -.15(ey b)-.1 H .096 (indings and v).15 F .096 (ariable settings to be performed as the result of tests.)-.25 F .097 (There are four parser)5.096 F(directi)108 592.8 Q -.15(ve)-.25 G 2.5 (su).15 G(sed.)-2.5 E F1($if)108 609.6 Q F0(The)144 609.6 Q F1($if)2.963 E F0 .463(construct allo)2.963 F .462(ws bindings to be made based on t\ he editing mode, the terminal being used,)-.25 F (or the application using readline.)144 621.6 Q(The te)5 E (xt of the test, after an)-.15 E 2.5(yc)-.15 G(omparison operator)-2.5 E (,)-.4 E -.15(ex)146.5 633.6 S(tends to the end of the line; unless oth\ erwise noted, no characters are required to isolate it.).15 E F1(mode) 144 650.4 Q F0(The)180 650.4 Q F1(mode=)3.711 E F0 1.211(form of the) 3.711 F F1($if)3.711 E F0(directi)3.711 E 1.511 -.15(ve i)-.25 H 3.711 (su).15 G 1.211(sed to test whether readline is in emacs or vi)-3.711 F 3.065(mode. This)180 662.4 R .565(may be used in conjunction with the) 3.065 F F1 .565(set k)3.065 F(eymap)-.1 E F0 .565 (command, for instance, to)3.065 F .735(set bindings in the)180 674.4 R F2(emacs\255standar)3.235 E(d)-.37 E F0(and)3.235 E F2(emacs\255ctlx) 3.235 E F0 -.1(ke)3.235 G .735(ymaps only if readline is starting)-.05 F (out in emacs mode.)180 686.4 Q F1(term)144 703.2 Q F0(The)180 703.2 Q F1(term=)3.197 E F0 .696 (form may be used to include terminal-speci\214c k)3.197 F .996 -.15 (ey b)-.1 H .696(indings, perhaps to bind).15 F .654(the k)180 715.2 R .954 -.15(ey s)-.1 H .654(equences output by the terminal').15 F 3.154 (sf)-.55 G .654(unction k)-3.154 F -.15(ey)-.1 G 3.154(s. The).15 F -.1 (wo)3.154 G .654(rd on the right side of).1 F(the)180 727.2 Q F1(=)3.232 E F0 .732(is tested ag)3.232 F .732(ainst both the full name of the ter\ minal and the portion of the terminal)-.05 F(GNU Bash 5.1)72 768 Q (2020 October 29)141.235 E(44)190.395 E 0 Cg EP %%Page: 45 45 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E (name before the \214rst)180 84 Q/F1 10/Times-Bold@0 SF2.5 E F0 5 (.T)C(his allo)-5 E(ws)-.25 E/F2 10/Times-Italic@0 SF(sun)2.84 E F0 (to match both)2.74 E F2(sun)2.84 E F0(and)2.74 E F2(sun\255cmd)2.84 E F0 2.5(,f).77 G(or instance.)-2.5 E F1 -.1(ve)144 100.8 S(rsion).1 E F0 (The)180 112.8 Q F1 -.1(ve)3.108 G(rsion).1 E F0 .608 (test may be used to perform comparisons ag)3.108 F .609 (ainst speci\214c readline v)-.05 F(ersions.)-.15 E(The)180 124.8 Q F1 -.1(ve)2.772 G(rsion).1 E F0 -.15(ex)2.772 G .272 (pands to the current readline v).15 F 2.771(ersion. The)-.15 F .271 (set of comparison operators in-)2.771 F(cludes)180 136.8 Q F1(=)3.063 E F0 3.063(,\()C(and)-3.063 E F1(==)3.063 E F0(\),)A F1(!=)3.063 E F0(,)A F1(<=)3.063 E F0(,)A F1(>=)3.063 E F0(,)A F1(<)3.063 E F0 3.063(,a)C(nd) -3.063 E F1(>)3.064 E F0 5.564(.T)C .564(he v)-5.564 F .564 (ersion number supplied on the right side)-.15 F .318 (of the operator consists of a major v)180 148.8 R .318(ersion number) -.15 F 2.818(,a)-.4 G 2.818(no)-2.818 G .318 (ptional decimal point, and an op-)-2.818 F .1(tional minor v)180 160.8 R .1(ersion \(e.g.,)-.15 F F1(7.1)2.6 E F0 .1(\). If the minor v)B .101 (ersion is omitted, it is assumed to be)-.15 F F1(0)2.601 E F0 5.101(.T) C(he)-5.101 E .06(operator may be separated from the string)180 172.8 R F1 -.1(ve)2.56 G(rsion).1 E F0 .06(and from the v)2.56 F .06 (ersion number ar)-.15 F(gument)-.18 E(by whitespace.)180 184.8 Q F1 (application)144 201.6 Q F0(The)180 213.6 Q F1(application)3.003 E F0 .503(construct is used to include application-speci\214c settings.)3.003 F .503(Each program)5.503 F .114(using the readline library sets the)180 225.6 R F2 .114(application name)2.614 F F0 2.614(,a)C .114 (nd an initialization \214le can test for a)-2.614 F .5(particular v)180 237.6 R 3(alue. This)-.25 F .501(could be used to bind k)3 F .801 -.15 (ey s)-.1 H .501(equences to functions useful for a spe-).15 F .397 (ci\214c program.)180 249.6 R -.15(Fo)5.397 G 2.896(ri).15 G .396 (nstance, the follo)-2.896 F .396(wing command adds a k)-.25 F .696 -.15 (ey s)-.1 H .396(equence that quotes the).15 F(current or pre)180 261.6 Q(vious w)-.25 E(ord in)-.1 E F1(bash)2.5 E F0(:)A F1($if)180 285.6 Q F0 (Bash)2.5 E 2.5(#Q)180 297.6 S(uote the current or pre)-2.5 E(vious w) -.25 E(ord)-.1 E("\\C\255xq": "\\eb\\"\\ef\\"")180 309.6 Q F1($endif)180 321.6 Q F2(variable)144 338.4 Q F0(The)180 350.4 Q F2(variable)3.776 E F0 1.276(construct pro)3.776 F 1.276 (vides simple equality tests for readline v)-.15 F 1.277(ariables and v) -.25 F(alues.)-.25 E .08(The permitted comparison operators are)180 362.4 R F2(=)2.579 E F0(,)A F2(==)2.579 E F0 2.579(,a)C(nd)-2.579 E F2 (!=)2.579 E F0 5.079(.T)C .079(he v)-5.079 F .079 (ariable name must be sepa-)-.25 F .98(rated from the comparison operat\ or by whitespace; the operator may be separated from)180 374.4 R .13 (the v)180 386.4 R .13(alue on the right hand side by whitespace.)-.25 F .129(Both string and boolean v)5.129 F .129(ariables may be)-.25 F (tested. Boolean v)180 398.4 Q(ariables must be tested ag)-.25 E (ainst the v)-.05 E(alues)-.25 E F2(on)2.5 E F0(and)2.5 E F2(of)2.5 E(f) -.18 E F0(.)A F1($endif)108 415.2 Q F0(This command, as seen in the pre) 144 415.2 Q(vious e)-.25 E(xample, terminates an)-.15 E F1($if)2.5 E F0 (command.)2.5 E F1($else)108 432 Q F0(Commands in this branch of the)144 432 Q F1($if)2.5 E F0(directi)2.5 E .3 -.15(ve a)-.25 H(re e).15 E -.15 (xe)-.15 G(cuted if the test f).15 E(ails.)-.1 E F1($include)108 448.8 Q F0 .356(This directi)144 460.8 R .656 -.15(ve t)-.25 H(ak).15 E .356 (es a single \214lename as an ar)-.1 F .357 (gument and reads commands and bindings from that)-.18 F 2.5(\214le. F) 144 472.8 R(or e)-.15 E(xample, the follo)-.15 E(wing directi)-.25 E .3 -.15(ve w)-.25 H(ould read).05 E F2(/etc/inputr)2.5 E(c)-.37 E F0(:)A F1 ($include)144 496.8 Q F2(/etc/inputr)5.833 E(c)-.37 E F1(Sear)87 513.6 Q (ching)-.18 E F0 .835(Readline pro)108 525.6 R .835 (vides commands for searching through the command history \(see)-.15 F /F3 9/Times-Bold@0 SF(HIST)3.334 E(OR)-.162 E(Y)-.315 E F0(belo)3.084 E .834(w\) for lines)-.25 F(containing a speci\214ed string.)108 537.6 Q (There are tw)5 E 2.5(os)-.1 G(earch modes:)-2.5 E F2(incr)2.51 E (emental)-.37 E F0(and)3.01 E F2(non-incr)2.86 E(emental)-.37 E F0(.).51 E .697(Incremental searches be)108 554.4 R .697 (gin before the user has \214nished typing the search string.)-.15 F .698(As each character of the)5.698 F .113 (search string is typed, readline displays the ne)108 566.4 R .112 (xt entry from the history matching the string typed so f)-.15 F(ar)-.1 E 5.112(.A)-.55 G(n)-5.112 E .542 (incremental search requires only as man)108 578.4 R 3.042(yc)-.15 G .542(haracters as needed to \214nd the desired history entry)-3.042 F 5.542(.T)-.65 G .542(he char)-5.542 F(-)-.2 E .224 (acters present in the v)108 590.4 R .224(alue of the)-.25 F F1(isear) 2.724 E(ch-terminators)-.18 E F0 -.25(va)2.724 G .224 (riable are used to terminate an incremental search.).25 F .66 (If that v)108 602.4 R .66(ariable has not been assigned a v)-.25 F .66 (alue the Escape and Control-J characters will terminate an incre-)-.25 F .097(mental search.)108 614.4 R .096(Control-G will abort an incremen\ tal search and restore the original line.)5.097 F .096 (When the search is)5.096 F(terminated, the history entry containing th\ e search string becomes the current line.)108 626.4 Q 2.938 -.8(To \214) 108 643.2 T 1.339(nd other matching entries in the history list, type C\ ontrol-S or Control-R as appropriate.).8 F 1.339(This will)6.339 F .675 (search backw)108 655.2 R .675(ard or forw)-.1 F .675 (ard in the history for the ne)-.1 F .674 (xt entry matching the search string typed so f)-.15 F(ar)-.1 E 5.674 (.A)-.55 G -.15(ny)-5.674 G .174(other k)108 667.2 R .474 -.15(ey s)-.1 H .174 (equence bound to a readline command will terminate the search and e).15 F -.15(xe)-.15 G .175(cute that command.).15 F -.15(Fo)5.175 G(r).15 E .541(instance, a)108 679.2 R F2(ne)3.041 E(wline)-.15 E F0 .541 (will terminate the search and accept the line, thereby e)3.041 F -.15 (xe)-.15 G .54(cuting the command from the).15 F(history list.)108 691.2 Q .653(Readline remembers the last incremental search string.)108 708 R .653(If tw)5.653 F 3.153(oC)-.1 G .653(ontrol-Rs are typed without an) -3.153 F 3.153(yi)-.15 G(nterv)-3.153 E(en-)-.15 E (ing characters de\214ning a ne)108 720 Q 2.5(ws)-.25 G (earch string, an)-2.5 E 2.5(yr)-.15 G(emembered search string is used.) -2.5 E(GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(45)190.395 E 0 Cg EP %%Page: 46 46 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E .567(Non-incremen\ tal searches read the entire search string before starting to search fo\ r matching history lines.)108 84 R(The search string may be typed by th\ e user or be part of the contents of the current line.)108 96 Q/F1 10 /Times-Bold@0 SF(Readline Command Names)87 112.8 Q F0 1.391(The follo) 108 124.8 R 1.391 (wing is a list of the names of the commands and the def)-.25 F 1.391 (ault k)-.1 F 1.691 -.15(ey s)-.1 H 1.391(equences to which the).15 F 3.892(ya)-.15 G(re)-3.892 E 2.622(bound. Command)108 136.8 R .122 (names without an accompan)2.622 F .122(ying k)-.15 F .421 -.15(ey s)-.1 H .121(equence are unbound by def).15 F 2.621(ault. In)-.1 F .121 (the follo)2.621 F(wing)-.25 E(descriptions,)108 148.8 Q/F2 10 /Times-Italic@0 SF(point)3.41 E F0 .91 (refers to the current cursor position, and)3.41 F F2(mark)3.411 E F0 .911(refers to a cursor position sa)3.411 F -.15(ve)-.2 G 3.411(db).15 G 3.411(yt)-3.411 G(he)-3.411 E F1(set\255mark)108 160.8 Q F0 2.5 (command. The)2.5 F(te)2.5 E (xt between the point and mark is referred to as the)-.15 E F2 -.37(re) 2.5 G(gion)-.03 E F0(.)A F1(Commands f)87 177.6 Q(or Mo)-.25 E(ving)-.1 E(beginning\255of\255line \(C\255a\))108 189.6 Q F0(Mo)144 201.6 Q .3 -.15(ve t)-.15 H 2.5(ot).15 G(he start of the current line.)-2.5 E F1 (end\255of\255line \(C\255e\))108 213.6 Q F0(Mo)144 225.6 Q .3 -.15 (ve t)-.15 H 2.5(ot).15 G(he end of the line.)-2.5 E F1 -.25(fo)108 237.6 S(rward\255char \(C\255f\)).25 E F0(Mo)144 249.6 Q .3 -.15(ve f) -.15 H(orw).15 E(ard a character)-.1 E(.)-.55 E F1 (backward\255char \(C\255b\))108 261.6 Q F0(Mo)144 273.6 Q .3 -.15(ve b) -.15 H(ack a character).15 E(.)-.55 E F1 -.25(fo)108 285.6 S(rward\255w) .25 E(ord \(M\255f\))-.1 E F0(Mo)144 297.6 Q .823 -.15(ve f)-.15 H(orw) .15 E .523(ard to the end of the ne)-.1 F .523(xt w)-.15 F 3.023(ord. W) -.1 F .522(ords are composed of alphanumeric characters \(let-)-.8 F (ters and digits\).)144 309.6 Q F1(backward\255w)108 321.6 Q (ord \(M\255b\))-.1 E F0(Mo)144 333.6 Q 1.71 -.15(ve b)-.15 H 1.41 (ack to the start of the current or pre).15 F 1.41(vious w)-.25 F 3.91 (ord. W)-.1 F 1.41(ords are composed of alphanumeric)-.8 F (characters \(letters and digits\).)144 345.6 Q F1(shell\255f)108 357.6 Q(orward\255w)-.25 E(ord)-.1 E F0(Mo)144 369.6 Q .784 -.15(ve f)-.15 H (orw).15 E .484(ard to the end of the ne)-.1 F .484(xt w)-.15 F 2.984 (ord. W)-.1 F .484(ords are delimited by non-quoted shell metacharac-) -.8 F(ters.)144 381.6 Q F1(shell\255backward\255w)108 393.6 Q(ord)-.1 E F0(Mo)144 405.6 Q .908 -.15(ve b)-.15 H .609 (ack to the start of the current or pre).15 F .609(vious w)-.25 F 3.109 (ord. W)-.1 F .609(ords are delimited by non-quoted shell)-.8 F (metacharacters.)144 417.6 Q F1(pr)108 429.6 Q -.15(ev)-.18 G (ious\255scr).15 E(een\255line)-.18 E F0 .891(Attempt to mo)144 441.6 R 1.191 -.15(ve p)-.15 H .891(oint to the same ph).15 F .891 (ysical screen column on the pre)-.05 F .89(vious ph)-.25 F .89 (ysical screen line.)-.05 F .87(This will not ha)144 453.6 R 1.17 -.15 (ve t)-.2 H .87(he desired ef).15 F .87 (fect if the current Readline line does not tak)-.25 F 3.37(eu)-.1 G 3.37(pm)-3.37 G .87(ore than one)-3.37 F(ph)144 465.6 Q(ysical line or \ if point is not greater than the length of the prompt plus the screen w\ idth.)-.05 E F1(next\255scr)108 477.6 Q(een\255line)-.18 E F0 .638 (Attempt to mo)144 489.6 R .938 -.15(ve p)-.15 H .638 (oint to the same ph).15 F .637(ysical screen column on the ne)-.05 F .637(xt ph)-.15 F .637(ysical screen line. This)-.05 F .008(will not ha) 144 501.6 R .309 -.15(ve t)-.2 H .009(he desired ef).15 F .009 (fect if the current Readline line does not tak)-.25 F 2.509(eu)-.1 G 2.509(pm)-2.509 G .009(ore than one ph)-2.509 F(ysical)-.05 E .772(line\ or if the length of the current Readline line is not greater than the \ length of the prompt plus)144 513.6 R(the screen width.)144 525.6 Q F1 (clear\255display \(M\255C\255l\))108 537.6 Q F0 1.498 (Clear the screen and, if possible, the terminal')144 549.6 R 3.999(ss) -.55 G 1.499(crollback b)-3.999 F(uf)-.2 E(fer)-.25 E 3.999(,t)-.4 G 1.499(hen redra)-3.999 F 3.999(wt)-.15 G 1.499(he current line,)-3.999 F (lea)144 561.6 Q(ving the current line at the top of the screen.)-.2 E F1(clear\255scr)108 573.6 Q(een \(C\255l\))-.18 E F0 1.36 (Clear the screen, then redra)144 585.6 R 3.86(wt)-.15 G 1.36 (he current line, lea)-3.86 F 1.36 (ving the current line at the top of the screen.)-.2 F -.4(Wi)144 597.6 S(th an ar).4 E (gument, refresh the current line without clearing the screen.)-.18 E F1 -.18(re)108 609.6 S(draw\255curr).18 E(ent\255line)-.18 E F0 (Refresh the current line.)144 621.6 Q F1(Commands f)87 638.4 Q (or Manipulating the History)-.25 E(accept\255line \(Newline, Retur)108 650.4 Q(n\))-.15 E F0 .158(Accept the line re)144 662.4 R -.05(ga)-.15 G .158(rdless of where the cursor is.).05 F .158 (If this line is non-empty)5.158 F 2.659(,a)-.65 G .159 (dd it to the history list)-2.659 F .699(according to the state of the) 144 674.4 R/F3 9/Times-Bold@0 SF(HISTCONTR)3.199 E(OL)-.27 E F0 -.25(va) 2.949 G 3.199(riable. If).25 F .699 (the line is a modi\214ed history line, then)3.199 F (restore the history line to its original state.)144 686.4 Q F1(pr)108 698.4 Q -.15(ev)-.18 G(ious\255history \(C\255p\)).15 E F0 (Fetch the pre)144 710.4 Q(vious command from the history list, mo)-.25 E(ving back in the list.)-.15 E(GNU Bash 5.1)72 768 Q(2020 October 29) 141.235 E(46)190.395 E 0 Cg EP %%Page: 47 47 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10/Times-Bold@0 SF(next\255history \(C\255n\))108 84 Q F0(Fetch the ne)144 96 Q (xt command from the history list, mo)-.15 E(ving forw)-.15 E (ard in the list.)-.1 E F1(beginning\255of\255history \(M\255<\))108 108 Q F0(Mo)144 120 Q .3 -.15(ve t)-.15 H 2.5(ot).15 G (he \214rst line in the history)-2.5 E(.)-.65 E F1 (end\255of\255history \(M\255>\))108 132 Q F0(Mo)144 144 Q .3 -.15(ve t) -.15 H 2.5(ot).15 G(he end of the input history)-2.5 E 2.5(,i)-.65 G (.e., the line currently being entered.)-2.5 E F1 -2.29 -.18(re v)108 156 T(erse\255sear).08 E(ch\255history \(C\255r\))-.18 E F0 1.47 (Search backw)144 168 R 1.471(ard starting at the current line and mo) -.1 F 1.471(ving `up' through the history as necessary)-.15 F(.)-.65 E (This is an incremental search.)144 180 Q F1 -.25(fo)108 192 S (rward\255sear).25 E(ch\255history \(C\255s\))-.18 E F0 1.132 (Search forw)144 204 R 1.132(ard starting at the current line and mo)-.1 F 1.131(ving `do)-.15 F 1.131(wn' through the history as necessary)-.25 F(.)-.65 E(This is an incremental search.)144 216 Q F1(non\255incr)108 228 Q(emental\255r)-.18 E -2.3 -.15(ev e)-.18 H(rse\255sear).15 E (ch\255history \(M\255p\))-.18 E F0 .164(Search backw)144 240 R .164(ar\ d through the history starting at the current line using a non-incremen\ tal search for)-.1 F 2.5(as)144 252 S(tring supplied by the user)-2.5 E (.)-.55 E F1(non\255incr)108 264 Q(emental\255f)-.18 E(orward\255sear) -.25 E(ch\255history \(M\255n\))-.18 E F0 1.354(Search forw)144 276 R 1.354(ard through the history using a non-incremental search for a stri\ ng supplied by the)-.1 F(user)144 288 Q(.)-.55 E F1(history\255sear)108 300 Q(ch\255f)-.18 E(orward)-.25 E F0 .248(Search forw)144 312 R .249(a\ rd through the history for the string of characters between the start o\ f the current line)-.1 F(and the point.)144 324 Q (This is a non-incremental search.)5 E F1(history\255sear)108 336 Q (ch\255backward)-.18 E F0 .951(Search backw)144 348 R .951(ard through \ the history for the string of characters between the start of the curre\ nt)-.1 F(line and the point.)144 360 Q (This is a non-incremental search.)5 E F1(history\255substring\255sear) 108 372 Q(ch\255backward)-.18 E F0 .95(Search backw)144 384 R .951(ard \ through the history for the string of characters between the start of t\ he current)-.1 F .007(line and the current cursor position \(the)144 396 R/F2 10/Times-Italic@0 SF(point)2.507 E F0 2.507(\). The)B .007 (search string may match an)2.507 F .006(ywhere in a history)-.15 F 2.5 (line. This)144 408 R(is a non-incremental search.)2.5 E F1 (history\255substring\255sear)108 420 Q(ch\255f)-.18 E(orward)-.25 E F0 .248(Search forw)144 432 R .249(ard through the history for the string \ of characters between the start of the current line)-.1 F .319 (and the point.)144 444 R .319(The search string may match an)5.319 F .319(ywhere in a history line.)-.15 F .318(This is a non-incremental) 5.318 F(search.)144 456 Q F1(yank\255nth\255ar)108 468 Q 2.5(g\()-.1 G <4dad43ad7929>-2.5 E F0 .622(Insert the \214rst ar)144 480 R .622 (gument to the pre)-.18 F .622(vious command \(usually the second w)-.25 F .622(ord on the pre)-.1 F .622(vious line\))-.25 F .773(at point.)144 492 R -.4(Wi)5.773 G .773(th an ar).4 F(gument)-.18 E F2(n)3.633 E F0 3.273(,i).24 G .773(nsert the)-3.273 F F2(n)3.273 E F0 .773(th w)B .773 (ord from the pre)-.1 F .773(vious command \(the w)-.25 F .773 (ords in the)-.1 F(pre)144 504 Q .291(vious command be)-.25 F .291 (gin with w)-.15 F .291(ord 0\).)-.1 F 2.791(An)5.291 G -2.25 -.15(eg a) -2.791 H(ti).15 E .591 -.15(ve a)-.25 H -.18(rg).15 G .291 (ument inserts the).18 F F2(n)2.791 E F0 .291(th w)B .292 (ord from the end of)-.1 F .282(the pre)144 516 R .282(vious command.) -.25 F .282(Once the ar)5.282 F(gument)-.18 E F2(n)2.781 E F0 .281 (is computed, the ar)2.781 F .281(gument is e)-.18 F .281 (xtracted as if the "!)-.15 F F2(n)A F0(")A(history e)144 528 Q (xpansion had been speci\214ed.)-.15 E F1(yank\255last\255ar)108 540 Q 2.5(g\()-.1 G -1.667(M\255. ,)-2.5 F -1.667(M\255_ \))2.5 F F0 1.307 (Insert the last ar)144 552 R 1.307(gument to the pre)-.18 F 1.307 (vious command \(the last w)-.25 F 1.308(ord of the pre)-.1 F 1.308 (vious history entry\).)-.25 F -.4(Wi)144 564 S .204(th a numeric ar).4 F .204(gument, beha)-.18 F .504 -.15(ve ex)-.2 H .204(actly lik).15 F(e) -.1 E F1(yank\255nth\255ar)2.704 E(g)-.1 E F0 5.203(.S)C(uccessi)-5.203 E .503 -.15(ve c)-.25 H .203(alls to).15 F F1(yank\255last\255ar)2.703 E (g)-.1 E F0(mo)144 576 Q .806 -.15(ve b)-.15 H .507 (ack through the history list, inserting the last w).15 F .507 (ord \(or the w)-.1 F .507(ord speci\214ed by the ar)-.1 F(gument)-.18 E .416(to the \214rst call\) of each line in turn.)144 588 R(An)5.416 E 2.916(yn)-.15 G .416(umeric ar)-2.916 F .416 (gument supplied to these successi)-.18 F .715 -.15(ve c)-.25 H .415 (alls de-).15 F 1.217(termines the direction to mo)144 600 R 1.518 -.15 (ve t)-.15 H 1.218(hrough the history).15 F 6.218(.A)-.65 G(ne)-2.5 E -.05(ga)-.15 G(ti).05 E 1.518 -.15(ve a)-.25 H -.18(rg).15 G 1.218 (ument switches the direction).18 F .494 (through the history \(back or forw)144 612 R 2.994(ard\). The)-.1 F .494(history e)2.994 F .494(xpansion f)-.15 F .494 (acilities are used to e)-.1 F .494(xtract the last)-.15 F -.1(wo)144 624 S(rd, as if the "!$" history e).1 E(xpansion had been speci\214ed.) -.15 E F1(shell\255expand\255line \(M\255C\255e\))108 636 Q F0 .622 (Expand the line as the shell does.)144 648 R .622 (This performs alias and history e)5.622 F .623 (xpansion as well as all of the)-.15 F(shell w)144 660 Q(ord e)-.1 E 2.5 (xpansions. See)-.15 F/F3 9/Times-Bold@0 SF(HIST)2.5 E(OR)-.162 E 2.25 (YE)-.315 G(XP)-2.25 E(ANSION)-.666 E F0(belo)2.25 E 2.5(wf)-.25 G (or a description of history e)-2.5 E(xpansion.)-.15 E F1 (history\255expand\255line \(M\255^\))108 672 Q F0 .939 (Perform history e)144 684 R .939(xpansion on the current line.)-.15 F (See)5.939 E F3(HIST)3.439 E(OR)-.162 E 3.189(YE)-.315 G(XP)-3.189 E (ANSION)-.666 E F0(belo)3.189 E 3.438(wf)-.25 G .938(or a descrip-) -3.438 F(tion of history e)144 696 Q(xpansion.)-.15 E(GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(47)190.395 E 0 Cg EP %%Page: 48 48 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10/Times-Bold@0 SF(magic\255space)108 84 Q F0 .437(Perform history e)144 96 R .437 (xpansion on the current line and insert a space.)-.15 F(See)5.438 E/F2 9/Times-Bold@0 SF(HIST)2.938 E(OR)-.162 E 2.688(YE)-.315 G(XP)-2.688 E (ANSION)-.666 E F0(be-)2.688 E(lo)144 108 Q 2.5(wf)-.25 G (or a description of history e)-2.5 E(xpansion.)-.15 E F1 (alias\255expand\255line)108 120 Q F0 .395(Perform alias e)144 132 R .395(xpansion on the current line.)-.15 F(See)5.395 E F2(ALIASES)2.895 E F0(abo)2.645 E .694 -.15(ve f)-.15 H .394(or a description of alias e) .15 F(xpan-)-.15 E(sion.)144 144 Q F1 (history\255and\255alias\255expand\255line)108 156 Q F0 (Perform history and alias e)144 168 Q(xpansion on the current line.) -.15 E F1(insert\255last\255ar)108 180 Q(gument \(M\255.)-.1 E 2.5(,M) .833 G -1.667(\255_ \))-2.5 F F0 2.5(As)144 192 S(ynon)-2.5 E(ym for) -.15 E F1(yank\255last\255ar)2.5 E(g)-.1 E F0(.)A F1 (operate\255and\255get\255next \(C\255o\))108 204 Q F0 .947 (Accept the current line for e)144 216 R -.15(xe)-.15 G .948 (cution and fetch the ne).15 F .948(xt line relati)-.15 F 1.248 -.15 (ve t)-.25 H 3.448(ot).15 G .948(he current line from the)-3.448 F .73 (history for editing.)144 228 R 3.23(An)5.73 G .73(umeric ar)-3.23 F .729 (gument, if supplied, speci\214es the history entry to use instead of) -.18 F(the current line.)144 240 Q F1 (edit\255and\255execute\255command \(C\255x C\255e\))108 252 Q F0(In)144 264 Q -.2(vo)-.4 G .346 -.1(ke a).2 H 2.646(ne).1 G .146 (ditor on the current command line, and e)-2.646 F -.15(xe)-.15 G .146 (cute the result as shell commands.).15 F F1(Bash)5.147 E F0(at-)2.647 E (tempts to in)144 276 Q -.2(vo)-.4 G -.1(ke).2 G F2($VISU)2.6 E(AL)-.54 E/F3 9/Times-Roman@0 SF(,)A F2($EDIT)2.25 E(OR)-.162 E F3(,)A F0(and) 2.25 E/F4 10/Times-Italic@0 SF(emacs)2.5 E F0(as the editor)2.5 E 2.5 (,i)-.4 G 2.5(nt)-2.5 G(hat order)-2.5 E(.)-.55 E F1(Commands f)87 292.8 Q(or Changing T)-.25 E(ext)-.92 E F4(end\255of\255\214le)108 304.8 Q F1 (\(usually C\255d\))2.5 E F0 .799 (The character indicating end-of-\214le as set, for e)144 316.8 R .799 (xample, by)-.15 F/F5 10/Courier@0 SF(stty)3.299 E F0 5.799(.I)C 3.298 (ft)-5.799 G .798(his character is read when)-3.298 F .592 (there are no characters on the line, and point is at the be)144 328.8 R .593(ginning of the line, Readline interprets it)-.15 F (as the end of input and returns)144 340.8 Q F2(EOF)2.5 E F3(.)A F1 (delete\255char \(C\255d\))108 352.8 Q F0 .442 (Delete the character at point.)144 364.8 R .442 (If this function is bound to the same character as the tty)5.442 F F1 (EOF)2.941 E F0(char)2.941 E(-)-.2 E(acter)144 376.8 Q 2.5(,a)-.4 G(s) -2.5 E F1(C\255d)2.5 E F0(commonly is, see abo)2.5 E .3 -.15(ve f)-.15 H (or the ef).15 E(fects.)-.25 E F1(backward\255delete\255char \(Rubout\)) 108 388.8 Q F0 .552(Delete the character behind the cursor)144 400.8 R 5.553(.W)-.55 G .553(hen gi)-5.553 F -.15(ve)-.25 G 3.053(nan).15 G .553 (umeric ar)-3.053 F .553(gument, sa)-.18 F .853 -.15(ve t)-.2 H .553 (he deleted te).15 F .553(xt on)-.15 F(the kill ring.)144 412.8 Q F1 -.25(fo)108 424.8 S(rward\255backward\255delete\255char).25 E F0 .474 (Delete the character under the cursor)144 436.8 R 2.974(,u)-.4 G .474 (nless the cursor is at the end of the line, in which case the)-2.974 F (character behind the cursor is deleted.)144 448.8 Q F1 (quoted\255insert \(C\255q, C\255v\))108 460.8 Q F0 .778(Add the ne)144 472.8 R .779(xt character typed to the line v)-.15 F 3.279 (erbatim. This)-.15 F .779(is ho)3.279 F 3.279(wt)-.25 G 3.279(oi)-3.279 G .779(nsert characters lik)-3.279 F(e)-.1 E F1(C\255q)3.279 E F0 3.279 (,f)C(or)-3.279 E -.15(ex)144 484.8 S(ample.).15 E F1 (tab\255insert \(C\255v T)108 496.8 Q(AB\))-.9 E F0 (Insert a tab character)144 508.8 Q(.)-.55 E F1 (self\255insert \(a, b, A, 1, !, ...\))108 520.8 Q F0 (Insert the character typed.)144 532.8 Q F1 (transpose\255chars \(C\255t\))108 544.8 Q F0 .322 (Drag the character before point forw)144 556.8 R .321(ard o)-.1 F -.15 (ve)-.15 G 2.821(rt).15 G .321(he character at point, mo)-2.821 F .321 (ving point forw)-.15 F .321(ard as well.)-.1 F .372 (If point is at the end of the line, then this transposes the tw)144 568.8 R 2.872(oc)-.1 G .373(haracters before point.)-2.872 F(Ne)5.373 E -.05(ga)-.15 G(ti).05 E .673 -.15(ve a)-.25 H -.2(r-).15 G(guments ha) 144 580.8 Q .3 -.15(ve n)-.2 H 2.5(oe).15 G -.25(ff)-2.5 G(ect.).25 E F1 (transpose\255w)108 592.8 Q(ords \(M\255t\))-.1 E F0 .024(Drag the w)144 604.8 R .024(ord before point past the w)-.1 F .023(ord after point, mo) -.1 F .023(ving point o)-.15 F -.15(ve)-.15 G 2.523(rt).15 G .023(hat w) -2.523 F .023(ord as well.)-.1 F .023(If point)5.023 F (is at the end of the line, this transposes the last tw)144 616.8 Q 2.5 (ow)-.1 G(ords on the line.)-2.6 E F1(upcase\255w)108 628.8 Q (ord \(M\255u\))-.1 E F0 1.698(Uppercase the current \(or follo)144 640.8 R 1.698(wing\) w)-.25 F 4.198(ord. W)-.1 F 1.698(ith a ne)-.4 F -.05(ga)-.15 G(ti).05 E 1.999 -.15(ve a)-.25 H -.18(rg).15 G 1.699 (ument, uppercase the pre).18 F(vious)-.25 E -.1(wo)144 652.8 S(rd, b).1 E(ut do not mo)-.2 E .3 -.15(ve p)-.15 H(oint.).15 E F1(do)108 664.8 Q (wncase\255w)-.1 E(ord \(M\255l\))-.1 E F0(Lo)144 676.8 Q 1.648 (wercase the current \(or follo)-.25 F 1.648(wing\) w)-.25 F 4.148 (ord. W)-.1 F 1.647(ith a ne)-.4 F -.05(ga)-.15 G(ti).05 E 1.947 -.15 (ve a)-.25 H -.18(rg).15 G 1.647(ument, lo).18 F 1.647(wercase the pre) -.25 F(vious)-.25 E -.1(wo)144 688.8 S(rd, b).1 E(ut do not mo)-.2 E .3 -.15(ve p)-.15 H(oint.).15 E F1(capitalize\255w)108 700.8 Q (ord \(M\255c\))-.1 E F0 1.974(Capitalize the current \(or follo)144 712.8 R 1.974(wing\) w)-.25 F 4.474(ord. W)-.1 F 1.974(ith a ne)-.4 F -.05(ga)-.15 G(ti).05 E 2.274 -.15(ve a)-.25 H -.18(rg).15 G 1.975 (ument, capitalize the pre).18 F(vious)-.25 E -.1(wo)144 724.8 S(rd, b) .1 E(ut do not mo)-.2 E .3 -.15(ve p)-.15 H(oint.).15 E(GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(48)190.395 E 0 Cg EP %%Page: 49 49 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10/Times-Bold@0 SF -.1(ove)108 84 S(rwrite\255mode).1 E F0 -.8(To)144 96 S .438(ggle o) .8 F -.15(ve)-.15 G .438(rwrite mode.).15 F -.4(Wi)5.438 G .438(th an e) .4 F .438(xplicit positi)-.15 F .737 -.15(ve n)-.25 H .437(umeric ar).15 F .437(gument, switches to o)-.18 F -.15(ve)-.15 G .437(rwrite mode.).15 F -.4(Wi)144 108 S .78(th an e).4 F .781(xplicit non-positi)-.15 F 1.081 -.15(ve n)-.25 H .781(umeric ar).15 F .781 (gument, switches to insert mode.)-.18 F .781(This command af)5.781 F (fects)-.25 E(only)144 120 Q F1(emacs)4.395 E F0(mode;)4.395 E F1(vi) 4.395 E F0 1.894(mode does o)4.395 F -.15(ve)-.15 G 1.894(rwrite dif).15 F(ferently)-.25 E 6.894(.E)-.65 G 1.894(ach call to)-6.894 F/F2 10 /Times-Italic@0 SF -.37(re)4.394 G(adline\(\)).37 E F0 1.894 (starts in insert)4.394 F 3.968(mode. In)144 132 R -.15(ove)3.968 G 1.468(rwrite mode, characters bound to).15 F F1(self\255insert)3.969 E F0 1.469(replace the te)3.969 F 1.469(xt at point rather than)-.15 F .958(pushing the te)144 144 R .958(xt to the right.)-.15 F .957 (Characters bound to)5.958 F F1(backward\255delete\255char)3.457 E F0 .957(replace the character)3.457 F(before point with a space.)144 156 Q (By def)5 E(ault, this command is unbound.)-.1 E F1(Killing and Y)87 172.8 Q(anking)-.85 E(kill\255line \(C\255k\))108 184.8 Q F0 (Kill the te)144 196.8 Q(xt from point to the end of the line.)-.15 E F1 (backward\255kill\255line \(C\255x Rubout\))108 208.8 Q F0(Kill backw) 144 220.8 Q(ard to the be)-.1 E(ginning of the line.)-.15 E F1 (unix\255line\255discard \(C\255u\))108 232.8 Q F0(Kill backw)144 244.8 Q(ard from point to the be)-.1 E(ginning of the line.)-.15 E (The killed te)5 E(xt is sa)-.15 E -.15(ve)-.2 G 2.5(do).15 G 2.5(nt) -2.5 G(he kill-ring.)-2.5 E F1(kill\255whole\255line)108 256.8 Q F0 (Kill all characters on the current line, no matter where point is.)144 268.8 Q F1(kill\255w)108 280.8 Q(ord \(M\255d\))-.1 E F0 .728 (Kill from point to the end of the current w)144 292.8 R .729 (ord, or if between w)-.1 F .729(ords, to the end of the ne)-.1 F .729 (xt w)-.15 F(ord.)-.1 E -.8(Wo)144 304.8 S (rd boundaries are the same as those used by).8 E F1 -.25(fo)2.5 G (rward\255w).25 E(ord)-.1 E F0(.)A F1(backward\255kill\255w)108 316.8 Q (ord \(M\255Rubout\))-.1 E F0(Kill the w)144 328.8 Q(ord behind point.) -.1 E -.8(Wo)5 G(rd boundaries are the same as those used by).8 E F1 (backward\255w)2.5 E(ord)-.1 E F0(.)A F1(shell\255kill\255w)108 340.8 Q (ord)-.1 E F0 .729(Kill from point to the end of the current w)144 352.8 R .728(ord, or if between w)-.1 F .728(ords, to the end of the ne)-.1 F .728(xt w)-.15 F(ord.)-.1 E -.8(Wo)144 364.8 S (rd boundaries are the same as those used by).8 E F1(shell\255f)2.5 E (orward\255w)-.25 E(ord)-.1 E F0(.)A F1(shell\255backward\255kill\255w) 108 376.8 Q(ord)-.1 E F0 3.025(Kill the w)144 388.8 R 3.025 (ord behind point.)-.1 F -.8(Wo)8.025 G 3.025 (rd boundaries are the same as those used by).8 F F1(shell\255back-) 5.525 E(ward\255w)144 400.8 Q(ord)-.1 E F0(.)A F1(unix\255w)108 412.8 Q (ord\255rubout \(C\255w\))-.1 E F0 .365(Kill the w)144 424.8 R .365 (ord behind point, using white space as a w)-.1 F .364(ord boundary)-.1 F 5.364(.T)-.65 G .364(he killed te)-5.364 F .364(xt is sa)-.15 F -.15 (ve)-.2 G 2.864(do).15 G 2.864(nt)-2.864 G(he)-2.864 E(kill-ring.)144 436.8 Q F1(unix\255\214lename\255rubout)108 448.8 Q F0 .166(Kill the w) 144 460.8 R .166 (ord behind point, using white space and the slash character as the w) -.1 F .167(ord boundaries.)-.1 F(The)5.167 E(killed te)144 472.8 Q (xt is sa)-.15 E -.15(ve)-.2 G 2.5(do).15 G 2.5(nt)-2.5 G(he kill-ring.) -2.5 E F1(delete\255horizontal\255space \(M\255\\\))108 484.8 Q F0 (Delete all spaces and tabs around point.)144 496.8 Q F1(kill\255r)108 508.8 Q(egion)-.18 E F0(Kill the te)144 520.8 Q(xt in the current re) -.15 E(gion.)-.15 E F1(copy\255r)108 532.8 Q(egion\255as\255kill)-.18 E F0(Cop)144 544.8 Q 2.5(yt)-.1 G(he te)-2.5 E(xt in the re)-.15 E (gion to the kill b)-.15 E(uf)-.2 E(fer)-.25 E(.)-.55 E F1 (copy\255backward\255w)108 556.8 Q(ord)-.1 E F0(Cop)144 568.8 Q 4.801 (yt)-.1 G 2.301(he w)-4.801 F 2.301(ord before point to the kill b)-.1 F (uf)-.2 E(fer)-.25 E 7.301(.T)-.55 G 2.301(he w)-7.301 F 2.3 (ord boundaries are the same as)-.1 F F1(back-)4.8 E(ward\255w)144 580.8 Q(ord)-.1 E F0(.)A F1(copy\255f)108 592.8 Q(orward\255w)-.25 E(ord)-.1 E F0(Cop)144 604.8 Q 4.507(yt)-.1 G 2.007(he w)-4.507 F 2.007(ord follo) -.1 F 2.007(wing point to the kill b)-.25 F(uf)-.2 E(fer)-.25 E 7.008 (.T)-.55 G 2.008(he w)-7.008 F 2.008(ord boundaries are the same as)-.1 F F1 -.25(fo)4.508 G -.37(r-).25 G(ward\255w)144 616.8 Q(ord)-.1 E F0(.) A F1(yank \(C\255y\))108 628.8 Q F0 -1(Ya)144 640.8 S (nk the top of the kill ring into the b)1 E(uf)-.2 E(fer at point.)-.25 E F1(yank\255pop \(M\255y\))108 652.8 Q F0 (Rotate the kill ring, and yank the ne)144 664.8 Q 2.5(wt)-.25 G 2.5 (op. Only)-2.5 F -.1(wo)2.5 G(rks follo).1 E(wing)-.25 E F1(yank)2.5 E F0(or)2.5 E F1(yank\255pop)2.5 E F0(.)A F1(Numeric Ar)87 681.6 Q (guments)-.1 E(digit\255ar)108 693.6 Q (gument \(M\2550, M\2551, ..., M\255\255\))-.1 E F0 .367 (Add this digit to the ar)144 705.6 R .367 (gument already accumulating, or start a ne)-.18 F 2.867(wa)-.25 G -.18 (rg)-2.867 G 2.867(ument. M\255\255).18 F .366(starts a ne)2.867 F -.05 (ga)-.15 G(-).05 E(ti)144 717.6 Q .3 -.15(ve a)-.25 H -.18(rg).15 G (ument.).18 E(GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(49)190.395 E 0 Cg EP %%Page: 50 50 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10/Times-Bold@0 SF(uni)108 84 Q -.1(ve)-.1 G(rsal\255ar).1 E(gument)-.1 E F0 .778 (This is another w)144 96 R .779(ay to specify an ar)-.1 F 3.279 (gument. If)-.18 F .779(this command is follo)3.279 F .779 (wed by one or more digits,)-.25 F 1.376 (optionally with a leading minus sign, those digits de\214ne the ar)144 108 R 3.876(gument. If)-.18 F 1.376(the command is fol-)3.876 F(lo)144 120 Q 1.17(wed by digits, e)-.25 F -.15(xe)-.15 G(cuting).15 E F1(uni) 3.67 E -.1(ve)-.1 G(rsal\255ar).1 E(gument)-.1 E F0(ag)3.67 E 1.17 (ain ends the numeric ar)-.05 F 1.17(gument, b)-.18 F 1.17(ut is other) -.2 F(-)-.2 E .899(wise ignored.)144 132 R .898 (As a special case, if this command is immediately follo)5.899 F .898 (wed by a character that is)-.25 F 1.23 (neither a digit nor minus sign, the ar)144 144 R 1.23 (gument count for the ne)-.18 F 1.23(xt command is multiplied by four) -.15 F(.)-.55 E .823(The ar)144 156 R .823 (gument count is initially one, so e)-.18 F -.15(xe)-.15 G .823 (cuting this function the \214rst time mak).15 F .822(es the ar)-.1 F (gument)-.18 E(count four)144 168 Q 2.5(,as)-.4 G(econd time mak)-2.5 E (es the ar)-.1 E(gument count sixteen, and so on.)-.18 E F1(Completing) 87 184.8 Q(complete \(T)108 196.8 Q(AB\))-.9 E F0 1.137 (Attempt to perform completion on the te)144 208.8 R 1.137 (xt before point.)-.15 F F1(Bash)6.137 E F0 1.137 (attempts completion treating the)3.637 F(te)144 220.8 Q .533(xt as a v) -.15 F .533(ariable \(if the te)-.25 F .533(xt be)-.15 F .533(gins with) -.15 F F1($)3.033 E F0 .533(\), username \(if the te)B .532(xt be)-.15 F .532(gins with)-.15 F F1(~)3.032 E F0 .532(\), hostname \(if the)B(te) 144 232.8 Q .701(xt be)-.15 F .701(gins with)-.15 F F1(@)3.201 E F0 .701 (\), or command \(including aliases and functions\) in turn.)B .702 (If none of these pro-)5.701 F (duces a match, \214lename completion is attempted.)144 244.8 Q F1 (possible\255completions \(M\255?\))108 256.8 Q F0 (List the possible completions of the te)144 268.8 Q(xt before point.) -.15 E F1(insert\255completions \(M\255*\))108 280.8 Q F0 .783 (Insert all completions of the te)144 292.8 R .783 (xt before point that w)-.15 F .783(ould ha)-.1 F 1.083 -.15(ve b)-.2 H .783(een generated by).15 F F1(possible\255com-)3.282 E(pletions)144 304.8 Q F0(.)A F1(menu\255complete)108 316.8 Q F0 .928(Similar to)144 328.8 R F1(complete)3.428 E F0 3.428(,b)C .929(ut replaces the w)-3.628 F .929(ord to be completed with a single match from the list of)-.1 F 1.194(possible completions.)144 340.8 R 1.194(Repeated e)6.194 F -.15 (xe)-.15 G 1.194(cution of).15 F F1(menu\255complete)3.694 E F0 1.193 (steps through the list of possible)3.694 F .828 (completions, inserting each match in turn.)144 352.8 R .828 (At the end of the list of completions, the bell is rung)5.828 F .727 (\(subject to the setting of)144 364.8 R F1(bell\255style)3.227 E F0 3.227(\)a)C .727(nd the original te)-3.227 F .727(xt is restored.)-.15 F .727(An ar)5.727 F .727(gument of)-.18 F/F2 10/Times-Italic@0 SF(n)3.227 E F0(mo)3.227 E -.15(ve)-.15 G(s).15 E F2(n)3.227 E F0 1.73 (positions forw)144 376.8 R 1.73(ard in the list of matches; a ne)-.1 F -.05(ga)-.15 G(ti).05 E 2.03 -.15(ve a)-.25 H -.18(rg).15 G 1.73 (ument may be used to mo).18 F 2.03 -.15(ve b)-.15 H(ackw).15 E(ard)-.1 E(through the list.)144 388.8 Q(This command is intended to be bound to) 5 E F1 -.9(TA)2.5 G(B).9 E F0 2.5(,b)C(ut is unbound by def)-2.7 E (ault.)-.1 E F1(menu\255complete\255backward)108 400.8 Q F0 .82 (Identical to)144 412.8 R F1(menu\255complete)3.32 E F0 3.32(,b)C .82 (ut mo)-3.52 F -.15(ve)-.15 G 3.32(sb).15 G(ackw)-3.32 E .82 (ard through the list of possible completions, as if)-.1 F F1 (menu\255complete)144 424.8 Q F0(had been gi)2.5 E -.15(ve)-.25 G 2.5 (nan).15 G -2.25 -.15(eg a)-2.5 H(ti).15 E .3 -.15(ve a)-.25 H -.18(rg) .15 G 2.5(ument. This).18 F(command is unbound by def)2.5 E(ault.)-.1 E F1(delete\255char\255or\255list)108 436.8 Q F0 .234 (Deletes the character under the cursor if not at the be)144 448.8 R .234(ginning or end of the line \(lik)-.15 F(e)-.1 E F1(delete\255char) 2.735 E F0(\).)A .425(If at the end of the line, beha)144 460.8 R -.15 (ve)-.2 G 2.925(si).15 G .425(dentically to)-2.925 F F1 (possible\255completions)2.925 E F0 5.425(.T)C .425 (his command is unbound)-5.425 F(by def)144 472.8 Q(ault.)-.1 E F1 (complete\255\214lename \(M\255/\))108 484.8 Q F0 (Attempt \214lename completion on the te)144 496.8 Q(xt before point.) -.15 E F1(possible\255\214lename\255completions \(C\255x /\))108 508.8 Q F0(List the possible completions of the te)144 520.8 Q (xt before point, treating it as a \214lename.)-.15 E F1 (complete\255user)108 532.8 Q(name \(M\255~\))-.15 E F0 (Attempt completion on the te)144 544.8 Q (xt before point, treating it as a username.)-.15 E F1(possible\255user) 108 556.8 Q(name\255completions \(C\255x ~\))-.15 E F0 (List the possible completions of the te)144 568.8 Q (xt before point, treating it as a username.)-.15 E F1(complete\255v)108 580.8 Q(ariable \(M\255$\))-.1 E F0(Attempt completion on the te)144 592.8 Q(xt before point, treating it as a shell v)-.15 E(ariable.)-.25 E F1(possible\255v)108 604.8 Q(ariable\255completions \(C\255x $\))-.1 E F0(List the possible completions of the te)144 616.8 Q (xt before point, treating it as a shell v)-.15 E(ariable.)-.25 E F1 (complete\255hostname \(M\255@\))108 628.8 Q F0 (Attempt completion on the te)144 640.8 Q (xt before point, treating it as a hostname.)-.15 E F1 (possible\255hostname\255completions \(C\255x @\))108 652.8 Q F0 (List the possible completions of the te)144 664.8 Q (xt before point, treating it as a hostname.)-.15 E F1 (complete\255command \(M\255!\))108 676.8 Q F0 .58 (Attempt completion on the te)144 688.8 R .581 (xt before point, treating it as a command name.)-.15 F .581 (Command comple-)5.581 F .715(tion attempts to match the te)144 700.8 R .715(xt ag)-.15 F .715(ainst aliases, reserv)-.05 F .715(ed w)-.15 F .715(ords, shell functions, shell b)-.1 F .715(uiltins, and)-.2 F (\214nally e)144 712.8 Q -.15(xe)-.15 G (cutable \214lenames, in that order).15 E(.)-.55 E(GNU Bash 5.1)72 768 Q (2020 October 29)141.235 E(50)190.395 E 0 Cg EP %%Page: 51 51 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10/Times-Bold@0 SF(possible\255command\255completions \(C\255x !\))108 84 Q F0 (List the possible completions of the te)144 96 Q (xt before point, treating it as a command name.)-.15 E F1 (dynamic\255complete\255history \(M\255T)108 108 Q(AB\))-.9 E F0 .424 (Attempt completion on the te)144 120 R .425 (xt before point, comparing the te)-.15 F .425(xt ag)-.15 F .425 (ainst lines from the history list)-.05 F (for possible completion matches.)144 132 Q F1(dab)108 144 Q(br)-.1 E -.15(ev)-.18 G(\255expand).15 E F0 .611 (Attempt menu completion on the te)144 156 R .611 (xt before point, comparing the te)-.15 F .61(xt ag)-.15 F .61 (ainst lines from the his-)-.05 F (tory list for possible completion matches.)144 168 Q F1 (complete\255into\255braces \(M\255{\))108 180 Q F0 .4(Perform \214lena\ me completion and insert the list of possible completions enclosed with\ in braces so)144 192 R(the list is a)144 204 Q -.25(va)-.2 G (ilable to the shell \(see).25 E F1(Brace Expansion)2.5 E F0(abo)2.5 E -.15(ve)-.15 G(\).).15 E F1 -.25(Ke)87 220.8 S(yboard Macr).25 E(os)-.18 E(start\255kbd\255macr)108 232.8 Q 2.5(o\()-.18 G(C\255x \()-2.5 E(\)) .833 E F0(Be)144 244.8 Q(gin sa)-.15 E (ving the characters typed into the current k)-.2 E -.15(ey)-.1 G (board macro.).15 E F1(end\255kbd\255macr)108 256.8 Q 2.5(o\()-.18 G (C\255x \))-2.5 E(\)).833 E F0(Stop sa)144 268.8 Q (ving the characters typed into the current k)-.2 E -.15(ey)-.1 G (board macro and store the de\214nition.).15 E F1 (call\255last\255kbd\255macr)108 280.8 Q 2.5(o\()-.18 G(C\255x e\))-2.5 E F0(Re-e)144 292.8 Q -.15(xe)-.15 G 1(cute the last k).15 F -.15(ey)-.1 G .999(board macro de\214ned, by making the characters in the macro app\ ear as if).15 F(typed at the k)144 304.8 Q -.15(ey)-.1 G(board.).15 E F1 (print\255last\255kbd\255macr)108 316.8 Q 2.5(o\()-.18 G(\))-2.5 E F0 (Print the last k)144 328.8 Q -.15(ey)-.1 G (board macro de\214ned in a format suitable for the).15 E/F2 10 /Times-Italic@0 SF(inputr)2.5 E(c)-.37 E F0(\214le.)2.5 E F1 (Miscellaneous)87 345.6 Q -.18(re)108 357.6 S.18 E (ead\255init\255\214le \(C\255x C\255r\))-.18 E F0 1.776 (Read in the contents of the)144 369.6 R F2(inputr)4.276 E(c)-.37 E F0 1.777(\214le, and incorporate an)4.276 F 4.277(yb)-.15 G 1.777 (indings or v)-4.277 F 1.777(ariable assignments)-.25 F(found there.)144 381.6 Q F1(abort \(C\255g\))108 393.6 Q F0 3.249 (Abort the current editing command and ring the terminal')144 405.6 R 5.748(sb)-.55 G 3.248(ell \(subject to the setting of)-5.748 F F1 (bell\255style)144 417.6 Q F0(\).)A F1(do\255lo)108 429.6 Q(wer)-.1 E (case\255v)-.18 E(ersion \(M\255A, M\255B, M\255)-.1 E F2(x)A F1 2.5(,.) C(..\))-2.5 E F0 1.738(If the meta\214ed character)144 441.6 R F2(x) 4.238 E F0 1.739 (is uppercase, run the command that is bound to the corresponding)4.238 F(meta\214ed lo)144 453.6 Q(wercase character)-.25 E 5(.T)-.55 G (he beha)-5 E(vior is unde\214ned if)-.2 E F2(x)2.5 E F0(is already lo) 2.5 E(wercase.)-.25 E F1(pr)108 465.6 Q(e\214x\255meta \(ESC\))-.18 E F0 (Metafy the ne)144 477.6 Q(xt character typed.)-.15 E/F3 9/Times-Bold@0 SF(ESC)5 E F1(f)2.25 E F0(is equi)2.5 E -.25(va)-.25 G(lent to).25 E F1 (Meta\255f)2.5 E F0(.)A F1(undo \(C\255_, C\255x C\255u\))108 489.6 Q F0 (Incremental undo, separately remembered for each line.)144 501.6 Q F1 -2.29 -.18(re v)108 513.6 T(ert\255line \(M\255r\)).08 E F0 .231 (Undo all changes made to this line.)144 525.6 R .231(This is lik)5.231 F 2.731(ee)-.1 G -.15(xe)-2.881 G .23(cuting the).15 F F1(undo)2.73 E F0 .23(command enough times to re-)2.73 F (turn the line to its initial state.)144 537.6 Q F1 (tilde\255expand \(M\255&\))108 549.6 Q F0(Perform tilde e)144 561.6 Q (xpansion on the current w)-.15 E(ord.)-.1 E F1 (set\255mark \(C\255@, M\255\))108 573.6 Q F0 (Set the mark to the point.)144 585.6 Q(If a numeric ar)5 E (gument is supplied, the mark is set to that position.)-.18 E F1 (exchange\255point\255and\255mark \(C\255x C\255x\))108 597.6 Q F0(Sw) 144 609.6 Q .282(ap the point with the mark.)-.1 F .283 (The current cursor position is set to the sa)5.283 F -.15(ve)-.2 G 2.783(dp).15 G .283(osition, and the old)-2.783 F(cursor position is sa) 144 621.6 Q -.15(ve)-.2 G 2.5(da).15 G 2.5(st)-2.5 G(he mark.)-2.5 E F1 (character\255sear)108 633.6 Q(ch \(C\255]\))-.18 E F0 3.036(Ac)144 645.6 S .536(haracter is read and point is mo)-3.036 F -.15(ve)-.15 G 3.035(dt).15 G 3.035(ot)-3.035 G .535(he ne)-3.035 F .535 (xt occurrence of that character)-.15 F 5.535(.A)-.55 G(ne)-2.5 E -.05 (ga)-.15 G(ti).05 E .835 -.15(ve c)-.25 H(ount).15 E(searches for pre) 144 657.6 Q(vious occurrences.)-.25 E F1(character\255sear)108 669.6 Q (ch\255backward \(M\255C\255]\))-.18 E F0 3.543(Ac)144 681.6 S 1.043 (haracter is read and point is mo)-3.543 F -.15(ve)-.15 G 3.544(dt).15 G 3.544(ot)-3.544 G 1.044(he pre)-3.544 F 1.044 (vious occurrence of that character)-.25 F 6.044(.A)-.55 G(ne)-2.5 E -.05(ga)-.15 G(ti).05 E -.15(ve)-.25 G (count searches for subsequent occurrences.)144 693.6 Q F1 (skip\255csi\255sequence)108 705.6 Q F0 1.827 (Read enough characters to consume a multi-k)144 717.6 R 2.126 -.15 (ey s)-.1 H 1.826(equence such as those de\214ned for k).15 F -.15(ey) -.1 G 4.326(sl).15 G(ik)-4.326 E(e)-.1 E .79(Home and End.)144 729.6 R .791(Such sequences be)5.79 F .791 (gin with a Control Sequence Indicator \(CSI\), usually ESC\255[.)-.15 F (GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(51)190.395 E 0 Cg EP %%Page: 52 52 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E .332 (If this sequence is bound to "\\[", k)144 84 R -.15(ey)-.1 G 2.831(sp) .15 G .331(roducing such sequences will ha)-2.831 F .631 -.15(ve n)-.2 H 2.831(oe).15 G -.25(ff)-2.831 G .331(ect unless e).25 F(xplic-)-.15 E .026(itly bound to a readline command, instead of inserting stray chara\ cters into the editing b)144 96 R(uf)-.2 E(fer)-.25 E 5.026(.T)-.55 G (his)-5.026 E(is unbound by def)144 108 Q(ault, b)-.1 E (ut usually bound to ESC\255[.)-.2 E/F1 10/Times-Bold@0 SF (insert\255comment \(M\255#\))108 120 Q F0 -.4(Wi)144 132 S .481 (thout a numeric ar).4 F .481(gument, the v)-.18 F .481 (alue of the readline)-.25 F F1(comment\255begin)2.981 E F0 -.25(va) 2.981 G .48(riable is inserted at the).25 F(be)144 144 Q .244 (ginning of the current line.)-.15 F .245(If a numeric ar)5.244 F .245 (gument is supplied, this command acts as a toggle: if)-.18 F .322 (the characters at the be)144 156 R .321 (ginning of the line do not match the v)-.15 F .321(alue of)-.25 F F1 (comment\255begin)2.821 E F0 2.821(,t)C .321(he v)-2.821 F .321(alue is) -.25 F .831(inserted, otherwise the characters in)144 168 R F1 (comment\255begin)3.331 E F0 .832(are deleted from the be)3.331 F .832 (ginning of the line.)-.15 F 1.469 (In either case, the line is accepted as if a ne)144 180 R 1.468 (wline had been typed.)-.25 F 1.468(The def)6.468 F 1.468(ault v)-.1 F 1.468(alue of)-.25 F F1(com-)3.968 E(ment\255begin)144 192 Q F0 .839 (causes this command to mak)3.339 F 3.339(et)-.1 G .839 (he current line a shell comment.)-3.339 F .84(If a numeric ar)5.84 F (gu-)-.18 E(ment causes the comment character to be remo)144 204 Q -.15 (ve)-.15 G(d, the line will be e).15 E -.15(xe)-.15 G (cuted by the shell.).15 E F1(glob\255complete\255w)108 216 Q (ord \(M\255g\))-.1 E F0 .792(The w)144 228 R .791 (ord before point is treated as a pattern for pathname e)-.1 F .791 (xpansion, with an asterisk implicitly)-.15 F 2.5(appended. This)144 240 R(pattern is used to generate a list of matching \214lenames for possib\ le completions.)2.5 E F1(glob\255expand\255w)108 252 Q(ord \(C\255x *\)) -.1 E F0 .175(The w)144 264 R .176 (ord before point is treated as a pattern for pathname e)-.1 F .176 (xpansion, and the list of matching \214le-)-.15 F .516 (names is inserted, replacing the w)144 276 R 3.016(ord. If)-.1 F 3.016 (an)3.016 G .516(umeric ar)-3.016 F .516 (gument is supplied, an asterisk is appended)-.18 F(before pathname e) 144 288 Q(xpansion.)-.15 E F1(glob\255list\255expansions \(C\255x g\)) 108 300 Q F0 .923(The list of e)144 312 R .923(xpansions that w)-.15 F .923(ould ha)-.1 F 1.223 -.15(ve b)-.2 H .923(een generated by).15 F F1 (glob\255expand\255w)3.423 E(ord)-.1 E F0 .923(is displayed, and)3.423 F .872(the line is redra)144 324 R 3.372(wn. If)-.15 F 3.372(an)3.372 G .872(umeric ar)-3.372 F .872 (gument is supplied, an asterisk is appended before pathname)-.18 F -.15 (ex)144 336 S(pansion.).15 E F1(dump\255functions)108 348 Q F0 .626 (Print all of the functions and their k)144 360 R .926 -.15(ey b)-.1 H .627(indings to the readline output stream.).15 F .627(If a numeric ar) 5.627 F(gu-)-.18 E (ment is supplied, the output is formatted in such a w)144 372 Q (ay that it can be made part of an)-.1 E/F2 10/Times-Italic@0 SF(inputr) 2.5 E(c)-.37 E F0(\214le.)2.5 E F1(dump\255v)108 384 Q(ariables)-.1 E F0 .763(Print all of the settable readline v)144 396 R .762 (ariables and their v)-.25 F .762(alues to the readline output stream.) -.25 F .762(If a nu-)5.762 F .108(meric ar)144 408 R .108 (gument is supplied, the output is formatted in such a w)-.18 F .109 (ay that it can be made part of an)-.1 F F2(in-)2.609 E(putr)144 420 Q (c)-.37 E F0(\214le.)2.5 E F1(dump\255macr)108 432 Q(os)-.18 E F0 .593 (Print all of the readline k)144 444 R .893 -.15(ey s)-.1 H .592 (equences bound to macros and the strings the).15 F 3.092(yo)-.15 G 3.092(utput. If)-3.092 F 3.092(an)3.092 G(umeric)-3.092 E(ar)144 456 Q .528(gument is supplied, the output is formatted in such a w)-.18 F .528 (ay that it can be made part of an)-.1 F F2(inputr)3.028 E(c)-.37 E F0 (\214le.)144 468 Q F1(display\255shell\255v)108 480 Q (ersion \(C\255x C\255v\))-.1 E F0(Display v)144 492 Q (ersion information about the current instance of)-.15 E F1(bash)2.5 E F0(.)A F1(Pr)87 508.8 Q(ogrammable Completion)-.18 E F0 .147(When w)108 520.8 R .147(ord completion is attempted for an ar)-.1 F .147 (gument to a command for which a completion speci\214cation \(a)-.18 F F2(compspec)108 532.8 Q F0 3.828(\)h)C 1.329 (as been de\214ned using the)-3.828 F F1(complete)3.829 E F0 -.2(bu) 3.829 G 1.329(iltin \(see).2 F/F3 9/Times-Bold@0 SF 1.329(SHELL B)3.829 F(UIL)-.09 E 1.329(TIN COMMANDS)-.828 F F0(belo)3.579 E 1.329(w\), the) -.25 F(programmable completion f)108 544.8 Q(acilities are in)-.1 E -.2 (vo)-.4 G -.1(ke).2 G(d.).1 E .498 (First, the command name is identi\214ed.)108 561.6 R .498 (If the command w)5.498 F .497 (ord is the empty string \(completion attempted at)-.1 F .233(the be)108 573.6 R .233(ginning of an empty line\), an)-.15 F 2.733(yc)-.15 G .233 (ompspec de\214ned with the)-2.733 F F12.733 E F0 .233(option to) 2.733 F F1(complete)2.733 E F0 .233(is used.)2.733 F .234(If a comp-) 5.234 F .481(spec has been de\214ned for that command, the compspec is \ used to generate the list of possible completions)108 585.6 R .822 (for the w)108 597.6 R 3.322(ord. If)-.1 F .822(the command w)3.322 F .823(ord is a full pathname, a compspec for the full pathname is search\ ed for)-.1 F 2.867(\214rst. If)108 609.6 R .366(no compspec is found fo\ r the full pathname, an attempt is made to \214nd a compspec for the po\ rtion)2.867 F(follo)108 621.6 Q .298(wing the \214nal slash.)-.25 F .298 (If those searches do not result in a compspec, an)5.298 F 2.799(yc)-.15 G .299(ompspec de\214ned with the)-2.799 F F12.799 E F0 .057 (option to)108 633.6 R F1(complete)2.557 E F0 .056(is used as the def) 2.556 F 2.556(ault. If)-.1 F .056(there is no def)2.556 F .056 (ault compspec,)-.1 F F1(bash)2.556 E F0 .056(attempts alias e)2.556 F .056(xpansion on)-.15 F .332(the command w)108 645.6 R .332(ord as a \ \214nal resort, and attempts to \214nd a compspec for the command w)-.1 F .332(ord from an)-.1 F 2.833(ys)-.15 G(uc-)-2.833 E(cessful e)108 657.6 Q(xpansion.)-.15 E .817(Once a compspec has been found, it is use\ d to generate the list of matching w)108 674.4 R 3.317(ords. If)-.1 F 3.317(ac)3.317 G .817(ompspec is not)-3.317 F(found, the def)108 686.4 Q (ault)-.1 E F1(bash)2.5 E F0(completion as described abo)2.5 E .3 -.15 (ve u)-.15 H(nder).15 E F1(Completing)2.5 E F0(is performed.)2.5 E .463 (First, the actions speci\214ed by the compspec are used.)108 703.2 R .464(Only matches which are pre\214x)5.464 F .464(ed by the w)-.15 F .464(ord being)-.1 F .596(completed are returned.)108 715.2 R .596 (When the)5.596 F F13.096 E F0(or)3.095 E F13.095 E F0 .595 (option is used for \214lename or directory name completion, the)3.095 F (shell v)108 727.2 Q(ariable)-.25 E F3(FIGNORE)2.5 E F0 (is used to \214lter the matches.)2.25 E(GNU Bash 5.1)72 768 Q (2020 October 29)141.235 E(52)190.395 E 0 Cg EP %%Page: 53 53 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E(An)108 84 Q 4.084 (yc)-.15 G 1.584(ompletions speci\214ed by a pathname e)-4.084 F 1.584 (xpansion pattern to the)-.15 F/F1 10/Times-Bold@0 SF4.084 E F0 1.584(option are generated ne)4.084 F 4.084(xt. The)-.15 F -.1(wo)108 96 S .555(rds generated by the pattern need not match the w).1 F .554 (ord being completed.)-.1 F(The)5.554 E/F2 9/Times-Bold@0 SF(GLOBIGNORE) 3.054 E F0 .554(shell v)2.804 F(ari-)-.25 E (able is not used to \214lter the matches, b)108 108 Q(ut the)-.2 E F2 (FIGNORE)2.5 E F0 -.25(va)2.25 G(riable is used.).25 E(Ne)108 124.8 Q .32(xt, the string speci\214ed as the ar)-.15 F .32(gument to the)-.18 F F12.82 E F0 .321(option is considered.)2.821 F .321 (The string is \214rst split using the)5.321 F .413(characters in the) 108 136.8 R F2(IFS)2.913 E F0 .412(special v)2.663 F .412 (ariable as delimiters.)-.25 F .412(Shell quoting is honored.)5.412 F .412(Each w)5.412 F .412(ord is then e)-.1 F(xpanded)-.15 E .091 (using brace e)108 148.8 R .091(xpansion, tilde e)-.15 F .092 (xpansion, parameter and v)-.15 F .092(ariable e)-.25 F .092 (xpansion, command substitution, and arith-)-.15 F 1.397(metic e)108 160.8 R 1.396(xpansion, as described abo)-.15 F 1.696 -.15(ve u)-.15 H (nder).15 E F2(EXP)3.896 E(ANSION)-.666 E/F3 9/Times-Roman@0 SF(.)A F0 1.396(The results are split using the rules described)5.896 F(abo)108 172.8 Q .509 -.15(ve u)-.15 H(nder).15 E F1 -.75(Wo)2.709 G .209 (rd Splitting).75 F F0 5.209(.T)C .209(he results of the e)-5.209 F .209 (xpansion are pre\214x-matched ag)-.15 F .21(ainst the w)-.05 F .21 (ord being com-)-.1 F(pleted, and the matching w)108 184.8 Q (ords become the possible completions.)-.1 E .234 (After these matches ha)108 201.6 R .534 -.15(ve b)-.2 H .234 (een generated, an).15 F 2.734(ys)-.15 G .233 (hell function or command speci\214ed with the)-2.734 F F12.733 E F0(and)2.733 E F12.733 E F0(op-)2.733 E 4.208(tions is in)108 213.6 R -.2(vo)-.4 G -.1(ke).2 G 6.708(d. When).1 F 4.209 (the command or function is in)6.708 F -.2(vo)-.4 G -.1(ke).2 G 4.209 (d, the).1 F F2(COMP_LINE)6.709 E F3(,)A F2(COMP_POINT)6.459 E F3(,)A F2 (COMP_KEY)108 225.6 Q F3(,)A F0(and)2.408 E F2(COMP_TYPE)2.658 E F0 -.25 (va)2.408 G .157(riables are assigned v).25 F .157 (alues as described abo)-.25 F .457 -.15(ve u)-.15 H(nder).15 E F1 .157 (Shell V)2.657 F(ariables)-.92 E F0 5.157(.I)C(f)-5.157 E 3.485(as)108 237.6 S .986(hell function is being in)-3.485 F -.2(vo)-.4 G -.1(ke).2 G .986(d, the).1 F F2(COMP_W)3.486 E(ORDS)-.09 E F0(and)3.236 E F2 (COMP_CW)3.486 E(ORD)-.09 E F0 -.25(va)3.236 G .986 (riables are also set.).25 F(When)5.986 E .347 (the function or command is in)108 249.6 R -.2(vo)-.4 G -.1(ke).2 G .347 (d, the \214rst ar).1 F .346(gument \()-.18 F F1($1)A F0 2.846(\)i)C 2.846(st)-2.846 G .346(he name of the command whose ar)-2.846 F(guments) -.18 E .263(are being completed, the second ar)108 261.6 R .263 (gument \()-.18 F F1($2)A F0 2.763(\)i)C 2.763(st)-2.763 G .264(he w) -2.763 F .264(ord being completed, and the third ar)-.1 F .264 (gument \()-.18 F F1($3)A F0 2.764(\)i)C(s)-2.764 E .629(the w)108 273.6 R .629(ord preceding the w)-.1 F .629 (ord being completed on the current command line.)-.1 F .628 (No \214ltering of the generated)5.629 F .714(completions ag)108 285.6 R .714(ainst the w)-.05 F .714(ord being completed is performed; the func\ tion or command has complete free-)-.1 F(dom in generating the matches.) 108 297.6 Q(An)108 314.4 Q 2.938(yf)-.15 G .437 (unction speci\214ed with)-2.938 F F12.937 E F0 .437(is in)2.937 F -.2(vo)-.4 G -.1(ke).2 G 2.937<648c>.1 G 2.937(rst. The)-2.937 F .437 (function may use an)2.937 F 2.937(yo)-.15 G 2.937(ft)-2.937 G .437 (he shell f)-2.937 F .437(acilities, including)-.1 F(the)108 326.4 Q F1 (compgen)2.956 E F0 -.2(bu)2.956 G .456(iltin described belo).2 F 1.756 -.65(w, t)-.25 H 2.956(og).65 G .456(enerate the matches.)-2.956 F .457 (It must put the possible completions in the)5.456 F F2(COMPREPL)108 338.4 Q(Y)-.828 E F0(array v)2.25 E(ariable, one per array element.)-.25 E(Ne)108 355.2 Q .081(xt, an)-.15 F 2.581(yc)-.15 G .081 (ommand speci\214ed with the)-2.581 F F12.581 E F0 .081 (option is in)2.581 F -.2(vo)-.4 G -.1(ke).2 G 2.581(di).1 G 2.58(na) -2.581 G 2.58(ne)-2.58 G -.4(nv)-2.58 G .08(ironment equi).4 F -.25(va) -.25 G .08(lent to command sub-).25 F 2.858(stitution. It)108 367.2 R .359(should print a list of completions, one per line, to the standard \ output.)2.858 F .359(Backslash may be used)5.359 F(to escape a ne)108 379.2 Q(wline, if necessary)-.25 E(.)-.65 E .377 (After all of the possible completions are generated, an)108 396 R 2.877 <798c>-.15 G .377(lter speci\214ed with the)-2.877 F F12.876 E F0 .376(option is applied to the)2.876 F 3.181(list. The)108 408 R .681 (\214lter is a pattern as used for pathname e)3.181 F .681(xpansion; a) -.15 F F1(&)3.181 E F0 .682(in the pattern is replaced with the te)3.182 F .682(xt of)-.15 F .523(the w)108 420 R .523(ord being completed.)-.1 F 3.023(Al)5.523 G(iteral)-3.023 E F1(&)3.023 E F0 .522 (may be escaped with a backslash; the backslash is remo)3.022 F -.15(ve) -.15 G 3.022(db).15 G(efore)-3.022 E .849(attempting a match.)108 432 R (An)5.849 E 3.349(yc)-.15 G .849 (ompletion that matches the pattern will be remo)-3.349 F -.15(ve)-.15 G 3.35(df).15 G .85(rom the list.)-3.35 F 3.35(Al)5.85 G(eading)-3.35 E F1 (!)3.35 E F0(ne)108 444 Q -.05(ga)-.15 G .764 (tes the pattern; in this case an).05 F 3.264(yc)-.15 G .764 (ompletion not matching the pattern will be remo)-3.264 F -.15(ve)-.15 G 3.264(d. If).15 F(the)3.264 E F1(nocase-)3.264 E(match)108 456 Q F0 (shell option is enabled, the match is performed without re)2.5 E -.05 (ga)-.15 G(rd to the case of alphabetic characters.).05 E(Finally)108 472.8 Q 3.086(,a)-.65 G .886 -.15(ny p)-3.086 H .586(re\214x and suf).15 F .587(\214x speci\214ed with the)-.25 F F13.087 E F0(and)3.087 E F13.087 E F0 .587(options are added to each member of the com-) 3.087 F(pletion list, and the result is returned to the readline comple\ tion code as the list of possible completions.)108 484.8 Q .247 (If the pre)108 501.6 R .247(viously-applied actions do not generate an) -.25 F 2.747(ym)-.15 G .247(atches, and the)-2.747 F F1 .247(\255o dir) 2.747 F(names)-.15 E F0 .247(option w)2.747 F .246(as supplied to)-.1 F F1(complete)108 513.6 Q F0(when the compspec w)2.5 E (as de\214ned, directory name completion is attempted.)-.1 E .461 (If the)108 530.4 R F1 .462(\255o plusdirs)2.961 F F0 .462(option w) 2.962 F .462(as supplied to)-.1 F F1(complete)2.962 E F0 .462 (when the compspec w)2.962 F .462(as de\214ned, directory name com-)-.1 F(pletion is attempted and an)108 542.4 Q 2.5(ym)-.15 G (atches are added to the results of the other actions.)-2.5 E .56 (By def)108 559.2 R .56(ault, if a compspec is found, whate)-.1 F -.15 (ve)-.25 G 3.06(ri).15 G 3.06(tg)-3.06 G .559 (enerates is returned to the completion code as the full set)-3.06 F .631(of possible completions.)108 571.2 R .631(The def)5.631 F(ault)-.1 E F1(bash)3.131 E F0 .631 (completions are not attempted, and the readline def)3.131 F .632 (ault of \214le-)-.1 F .559(name completion is disabled.)108 583.2 R .559(If the)5.559 F F1 .559(\255o bashdefault)3.059 F F0 .559(option w) 3.059 F .559(as supplied to)-.1 F F1(complete)3.058 E F0 .558 (when the compspec)3.058 F -.1(wa)108 595.2 S 3.171(sd).1 G .671 (e\214ned, the)-3.171 F F1(bash)3.171 E F0(def)3.171 E .671 (ault completions are attempted if the compspec generates no matches.) -.1 F .672(If the)5.672 F F13.172 E(default)108 607.2 Q F0 1.207 (option w)3.707 F 1.207(as supplied to)-.1 F F1(complete)3.707 E F0 1.207(when the compspec w)3.707 F 1.207(as de\214ned, readline')-.1 F 3.707(sd)-.55 G(ef)-3.707 E 1.206(ault completion)-.1 F (will be performed if the compspec \(and, if attempted, the def)108 619.2 Q(ault)-.1 E F1(bash)2.5 E F0(completions\) generate no matches.) 2.5 E .245(When a compspec indicates that directory name completion is \ desired, the programmable completion func-)108 636 R .633(tions force r\ eadline to append a slash to completed names which are symbolic links t\ o directories, subject)108 648 R 2.761(to the v)108 660 R 2.761 (alue of the)-.25 F F1(mark\255dir)5.261 E(ectories)-.18 E F0 2.761 (readline v)5.261 F 2.761(ariable, re)-.25 F -.05(ga)-.15 G 2.762 (rdless of the setting of the).05 F F1(mark-sym-)5.262 E(link)108 672 Q (ed\255dir)-.1 E(ectories)-.18 E F0(readline v)2.5 E(ariable.)-.25 E .191(There is some support for dynamically modifying completions.)108 688.8 R .19(This is most useful when used in combina-)5.191 F 1.172 (tion with a def)108 700.8 R 1.172(ault completion speci\214ed with)-.1 F F1 1.172(complete \255D)3.672 F F0 6.172(.I)C(t')-6.172 E 3.672(sp) -.55 G 1.172(ossible for shell functions e)-3.672 F -.15(xe)-.15 G 1.172 (cuted as).15 F .93(completion handlers to indicate that completion sho\ uld be retried by returning an e)108 712.8 R .93(xit status of 124.)-.15 F .93(If a)5.93 F .1(shell function returns 124, and changes the compsp\ ec associated with the command on which completion is)108 724.8 R (GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(53)190.395 E 0 Cg EP %%Page: 54 54 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E .666 (being attempted \(supplied as the \214rst ar)108 84 R .665 (gument when the function is e)-.18 F -.15(xe)-.15 G .665 (cuted\), programmable completion).15 F .083(restarts from the be)108 96 R .084(ginning, with an attempt to \214nd a ne)-.15 F 2.584(wc)-.25 G .084(ompspec for that command.)-2.584 F .084(This allo)5.084 F .084 (ws a set of)-.25 F(completions to be b)108 108 Q(uilt dynamically as c\ ompletion is attempted, rather than being loaded all at once.)-.2 E -.15 (Fo)108 124.8 S 2.637(ri).15 G .137 (nstance, assuming that there is a library of compspecs, each k)-2.637 F .137(ept in a \214le corresponding to the name of)-.1 F (the command, the follo)108 136.8 Q(wing def)-.25 E (ault completion function w)-.1 E(ould load completions dynamically:)-.1 E/F1 10/Courier@0 SF(_completion_loader\(\))108 153.6 Q({)108 165.6 Q 6 (.")144 177.6 S (/etc/bash_completion.d/$1.sh" >/dev/null 2>&1 && return 124)-6 E(})108 189.6 Q(complete -D -F _completion_loader -o bashdefault -o default)108 201.6 Q/F2 10.95/Times-Bold@0 SF(HIST)72 230.4 Q(OR)-.197 E(Y)-.383 E F0 .371(When the)108 242.4 R/F3 10/Times-Bold@0 SF .371(\255o history)2.871 F F0 .371(option to the)2.871 F F3(set)2.872 E F0 -.2(bu)2.872 G .372 (iltin is enabled, the shell pro).2 F .372(vides access to the)-.15 F/F4 10/Times-Italic@0 SF .372(command history)2.872 F F0(,)A .305 (the list of commands pre)108 254.4 R .305(viously typed.)-.25 F .305 (The v)5.305 F .304(alue of the)-.25 F/F5 9/Times-Bold@0 SF(HISTSIZE) 2.804 E F0 -.25(va)2.554 G .304(riable is used as the number of com-).25 F .429(mands to sa)108 266.4 R .729 -.15(ve i)-.2 H 2.929(nah).15 G .429 (istory list.)-2.929 F .429(The te)5.429 F .429(xt of the last)-.15 F F5 (HISTSIZE)2.93 E F0 .43(commands \(def)2.68 F .43(ault 500\) is sa)-.1 F -.15(ve)-.2 G 2.93(d. The).15 F(shell)2.93 E .287 (stores each command in the history list prior to parameter and v)108 278.4 R .287(ariable e)-.25 F .287(xpansion \(see)-.15 F F5(EXP)2.787 E (ANSION)-.666 E F0(abo)2.537 E -.15(ve)-.15 G(\)).15 E -.2(bu)108 290.4 S 4.065(ta).2 G 1.565(fter history e)-4.065 F 1.565 (xpansion is performed, subject to the v)-.15 F 1.565 (alues of the shell v)-.25 F(ariables)-.25 E F5(HISTIGNORE)4.065 E F0 (and)3.816 E F5(HISTCONTR)108 302.4 Q(OL)-.27 E/F6 9/Times-Roman@0 SF(.) A F0 .082 (On startup, the history is initialized from the \214le named by the v) 108 319.2 R(ariable)-.25 E F5(HISTFILE)2.582 E F0(\(def)2.332 E(ault)-.1 E F4(~/.bash_history)2.582 E F0(\).)A .315(The \214le named by the v)108 331.2 R .315(alue of)-.25 F F5(HISTFILE)2.815 E F0 .315 (is truncated, if necessary)2.565 F 2.815(,t)-.65 G 2.815(oc)-2.815 G .315(ontain no more than the number of)-2.815 F .659 (lines speci\214ed by the v)108 343.2 R .659(alue of)-.25 F F5 (HISTFILESIZE)3.158 E F6(.)A F0(If)5.158 E F3(HISTFILESIZE)3.158 E F0 .658(is unset, or set to null, a non-numeric)3.158 F -.25(va)108 355.2 S .142(lue, or a numeric v).25 F .142 (alue less than zero, the history \214le is not truncated.)-.25 F .142 (When the history \214le is read, lines)5.142 F(be)108 367.2 Q 1.605 (ginning with the history comment character follo)-.15 F 1.604 (wed immediately by a digit are interpreted as time-)-.25 F .15 (stamps for the follo)108 379.2 R .15(wing history line.)-.25 F .151 (These timestamps are optionally displayed depending on the v)5.151 F .151(alue of)-.25 F(the)108 391.2 Q F5(HISTTIMEFORMA)3.559 E(T)-.855 E F0 -.25(va)3.309 G 3.559(riable. When).25 F 3.559(as)3.559 G 1.059 (hell with history enabled e)-3.559 F 1.059(xits, the last)-.15 F F5 ($HISTSIZE)3.559 E F0 1.058(lines are)3.309 F .158 (copied from the history list to)108 403.2 R F5($HISTFILE)2.658 E F6(.)A F0 .158(If the)4.658 F F3(histappend)2.658 E F0 .159 (shell option is enabled \(see the description of)2.659 F F3(shopt)108 415.2 Q F0(under)2.582 E F5 .082(SHELL B)2.582 F(UIL)-.09 E .082 (TIN COMMANDS)-.828 F F0(belo)2.332 E .082 (w\), the lines are appended to the history \214le, otherwise the)-.25 F .196(history \214le is o)108 427.2 R -.15(ve)-.15 G 2.696(rwritten. If) .15 F F5(HISTFILE)2.696 E F0 .197(is unset, or if the history \214le is\ unwritable, the history is not sa)2.446 F -.15(ve)-.2 G(d.).15 E .584 (If the)108 439.2 R F5(HISTTIMEFORMA)3.084 E(T)-.855 E F0 -.25(va)2.834 G .584 (riable is set, time stamps are written to the history \214le, mark).25 F .583(ed with the his-)-.1 F 1.147(tory comment character)108 451.2 R 3.647(,s)-.4 G 3.647(ot)-3.647 G(he)-3.647 E 3.647(ym)-.15 G 1.147 (ay be preserv)-3.647 F 1.147(ed across shell sessions.)-.15 F 1.148 (This uses the history comment)6.148 F 1.377 (character to distinguish timestamps from other history lines.)108 463.2 R 1.377(After sa)6.377 F 1.377(ving the history)-.2 F 3.876(,t)-.65 G 1.376(he history \214le is)-3.876 F .756 (truncated to contain no more than)108 475.2 R F5(HISTFILESIZE)3.257 E F0 3.257(lines. If)3.007 F F5(HISTFILESIZE)3.257 E F0 .757 (is unset, or set to null, a non-)3.007 F(numeric v)108 487.2 Q (alue, or a numeric v)-.25 E (alue less than zero, the history \214le is not truncated.)-.25 E .299 (The b)108 504 R .299(uiltin command)-.2 F F3(fc)2.799 E F0(\(see)2.799 E F5 .299(SHELL B)2.799 F(UIL)-.09 E .299(TIN COMMANDS)-.828 F F0(belo) 2.549 E .298(w\) may be used to list or edit and re-e)-.25 F -.15(xe) -.15 G(-).15 E .471(cute a portion of the history list.)108 516 R(The) 5.471 E F3(history)2.971 E F0 -.2(bu)2.971 G .472 (iltin may be used to display or modify the history list and).2 F .002 (manipulate the history \214le.)108 528 R .001 (When using command-line editing, search commands are a)5.002 F -.25(va) -.2 G .001(ilable in each edit-).25 F(ing mode that pro)108 540 Q (vide access to the history list.)-.15 E 1.485(The shell allo)108 556.8 R 1.485(ws control o)-.25 F -.15(ve)-.15 G 3.986(rw).15 G 1.486 (hich commands are sa)-3.986 F -.15(ve)-.2 G 3.986(do).15 G 3.986(nt) -3.986 G 1.486(he history list.)-3.986 F(The)6.486 E F5(HISTCONTR)3.986 E(OL)-.27 E F0(and)3.736 E F5(HISTIGNORE)108 568.8 Q F0 -.25(va)2.708 G .458(riables may be set to cause the shell to sa).25 F .757 -.15(ve o) -.2 H .457(nly a subset of the commands entered.).15 F(The)5.457 E F3 (cmdhist)108 580.8 Q F0 .75 (shell option, if enabled, causes the shell to attempt to sa)3.25 F 1.05 -.15(ve e)-.2 H .75(ach line of a multi-line command in).15 F 1.077 (the same history entry)108 592.8 R 3.577(,a)-.65 G 1.077 (dding semicolons where necessary to preserv)-3.577 F 3.577(es)-.15 G 1.077(yntactic correctness.)-3.577 F(The)6.077 E F3(lithist)3.576 E F0 .373(shell option causes the shell to sa)108 604.8 R .674 -.15(ve t)-.2 H .374(he command with embedded ne).15 F .374 (wlines instead of semicolons.)-.25 F .374(See the)5.374 F .319 (description of the)108 616.8 R F3(shopt)2.819 E F0 -.2(bu)2.819 G .318 (iltin belo).2 F 2.818(wu)-.25 G(nder)-2.818 E F5 .318(SHELL B)2.818 F (UIL)-.09 E .318(TIN COMMANDS)-.828 F F0 .318 (for information on setting and)2.568 F(unsetting shell options.)108 628.8 Q F2(HIST)72 645.6 Q(OR)-.197 E 2.738(YE)-.383 G(XP)-2.738 E (ANSION)-.81 E F0 .61(The shell supports a history e)108 657.6 R .611 (xpansion feature that is similar to the history e)-.15 F .611 (xpansion in)-.15 F F3(csh)3.111 E F0 5.611(.T)C .611(his section)-5.611 F .871(describes what syntax features are a)108 669.6 R -.25(va)-.2 G 3.371(ilable. This).25 F .871(feature is enabled by def)3.371 F .87 (ault for interacti)-.1 F 1.17 -.15(ve s)-.25 H .87(hells, and).15 F .949(can be disabled using the)108 681.6 R F3(+H)3.449 E F0 .949 (option to the)3.449 F F3(set)3.449 E F0 -.2(bu)3.449 G .949 (iltin command \(see).2 F F5 .949(SHELL B)3.449 F(UIL)-.09 E .95 (TIN COMMANDS)-.828 F F0(be-)3.2 E(lo)108 693.6 Q 2.5 (w\). Non-interacti)-.25 F .3 -.15(ve s)-.25 H (hells do not perform history e).15 E(xpansion by def)-.15 E(ault.)-.1 E 1.306(History e)108 710.4 R 1.306(xpansions introduce w)-.15 F 1.306(or\ ds from the history list into the input stream, making it easy to repea\ t)-.1 F .209(commands, insert the ar)108 722.4 R .209(guments to a pre) -.18 F .21 (vious command into the current input line, or \214x errors in pre)-.25 F(vious)-.25 E(GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(54) 190.395 E 0 Cg EP %%Page: 55 55 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E(commands quickly) 108 84 Q(.)-.65 E 1.164(History e)108 100.8 R 1.163(xpansion is perform\ ed immediately after a complete line is read, before the shell breaks i\ t into)-.15 F -.1(wo)108 112.8 S .251 (rds, and is performed on each line indi).1 F .251 (vidually without taking quoting on pre)-.25 F .252 (vious lines into account.)-.25 F(It)5.252 E(tak)108 124.8 Q .146 (es place in tw)-.1 F 2.646(op)-.1 G 2.646(arts. The)-2.646 F .146(\214\ rst is to determine which line from the history list to use during subs\ titution.)2.646 F .766(The second is to select portions of that line fo\ r inclusion into the current one.)108 136.8 R .767 (The line selected from the)5.767 F .254(history is the)108 148.8 R/F1 10/Times-Italic@0 SF -.15(ev)2.754 G(ent).15 E F0 2.753(,a)C .253 (nd the portions of that line that are acted upon are)-2.753 F F1(wor) 2.753 E(ds)-.37 E F0 5.253(.V)C(arious)-6.363 E F1(modi\214er)2.753 E(s) -.1 E F0 .253(are a)2.753 F -.25(va)-.2 G(il-).25 E .538 (able to manipulate the selected w)108 160.8 R 3.038(ords. The)-.1 F .538(line is brok)3.038 F .538(en into w)-.1 F .539(ords in the same f) -.1 F .539(ashion as when reading)-.1 F .573(input, so that se)108 172.8 R -.15(ve)-.25 G(ral).15 E F1(metac)3.073 E(har)-.15 E(acter)-.15 E F0 .572(-separated w)B .572(ords surrounded by quotes are considered one w) -.1 F 3.072(ord. His-)-.1 F .355(tory e)108 184.8 R .355 (xpansions are introduced by the appearance of the history e)-.15 F .355 (xpansion character)-.15 F 2.855(,w)-.4 G .356(hich is)-2.855 F/F2 10 /Times-Bold@0 SF(!)3.689 E F0 .356(by def)3.689 F(ault.)-.1 E .791 (Only backslash \()108 196.8 R F2(\\).833 E F0 3.291(\)a).833 G .79 (nd single quotes can quote the history e)-3.291 F .79 (xpansion character)-.15 F 3.29(,b)-.4 G .79(ut the history e)-3.49 F (xpansion)-.15 E .789(character is also treated as quoted if it immedia\ tely precedes the closing double quote in a double-quoted)108 208.8 R (string.)108 220.8 Q(Se)108 237.6 Q -.15(ve)-.25 G .03 (ral characters inhibit history e).15 F .03 (xpansion if found immediately follo)-.15 F .03(wing the history e)-.25 F .03(xpansion character)-.15 F(,)-.4 E -2.15 -.25(ev e)108 249.6 T 3.162(ni).25 G 3.162(fi)-3.162 G 3.162(ti)-3.162 G 3.162(su)-3.162 G .662(nquoted: space, tab, ne)-3.162 F .662(wline, carriage return, and) -.25 F F2(=)3.162 E F0 5.662(.I)C 3.162(ft)-5.662 G(he)-3.162 E F2 (extglob)3.162 E F0 .662(shell option is enabled,)3.162 F F2(\()3.163 E F0(will also inhibit e)108 261.6 Q(xpansion.)-.15 E(Se)108 278.4 Q -.15 (ve)-.25 G .11(ral shell options settable with the).15 F F2(shopt)2.61 E F0 -.2(bu)2.61 G .109(iltin may be used to tailor the beha).2 F .109 (vior of history e)-.2 F(xpansion.)-.15 E .231(If the)108 290.4 R F2 (histv)2.731 E(erify)-.1 E F0 .231 (shell option is enabled \(see the description of the)2.731 F F2(shopt) 2.731 E F0 -.2(bu)2.731 G .231(iltin belo).2 F .231(w\), and)-.25 F F2 -.18(re)2.731 G(adline).18 E F0 .232(is be-)2.732 F .449(ing used, hist\ ory substitutions are not immediately passed to the shell parser)108 302.4 R 5.449(.I)-.55 G .448(nstead, the e)-5.449 F .448 (xpanded line is)-.15 F 2.228(reloaded into the)108 314.4 R F2 -.18(re) 4.728 G(adline).18 E F0 2.228(editing b)4.728 F(uf)-.2 E 2.228 (fer for further modi\214cation.)-.25 F(If)7.228 E F2 -.18(re)4.728 G (adline).18 E F0 2.228(is being used, and the)4.728 F F2(histr)108 326.4 Q(eedit)-.18 E F0 1.202(shell option is enabled, a f)3.702 F 1.202 (ailed history substitution will be reloaded into the)-.1 F F2 -.18(re) 3.702 G(adline).18 E F0(editing)3.702 E -.2(bu)108 338.4 S -.25(ff).2 G .303(er for correction.).25 F(The)5.303 E F22.803 E F0 .303 (option to the)2.803 F F2(history)2.804 E F0 -.2(bu)2.804 G .304 (iltin command may be used to see what a history e).2 F(x-)-.15 E .52 (pansion will do before using it.)108 350.4 R(The)5.52 E F23.02 E F0 .52(option to the)3.02 F F2(history)3.02 E F0 -.2(bu)3.02 G .52 (iltin may be used to add commands to the).2 F (end of the history list without actually e)108 362.4 Q -.15(xe)-.15 G (cuting them, so that the).15 E 2.5(ya)-.15 G(re a)-2.5 E -.25(va)-.2 G (ilable for subsequent recall.).25 E 1.108(The shell allo)108 379.2 R 1.108(ws control of the v)-.25 F 1.108 (arious characters used by the history e)-.25 F 1.108 (xpansion mechanism \(see the de-)-.15 F .163(scription of)108 391.2 R F2(histchars)2.663 E F0(abo)2.663 E .463 -.15(ve u)-.15 H(nder).15 E F2 .163(Shell V)2.663 F(ariables)-.92 E F0 2.663(\). The)B .162 (shell uses the history comment character to mark)2.663 F (history timestamps when writing the history \214le.)108 403.2 Q F2(Ev) 87 420 Q(ent Designators)-.1 E F0 .204(An e)108 432 R -.15(ve)-.25 G .204(nt designator is a reference to a command line entry in the histor\ y list.).15 F .205(Unless the reference is abso-)5.204 F(lute, e)108 444 Q -.15(ve)-.25 G(nts are relati).15 E .3 -.15(ve t)-.25 H 2.5(ot).15 G (he current position in the history list.)-2.5 E F2(!)108 460.8 Q F0 1.608(Start a history substitution, e)144 460.8 R 1.608 (xcept when follo)-.15 F 1.607(wed by a)-.25 F F2(blank)4.107 E F0 4.107 (,n)C -.25(ew)-4.107 G 1.607(line, carriage return, = or \().25 F (\(when the)144 472.8 Q F2(extglob)2.5 E F0 (shell option is enabled using the)2.5 E F2(shopt)2.5 E F0 -.2(bu)2.5 G (iltin\).).2 E F2(!)108 484.8 Q F1(n)A F0(Refer to command line)144 484.8 Q F1(n)2.86 E F0(.).24 E F2<21ad>108 496.8 Q F1(n)A F0 (Refer to the current command minus)144 496.8 Q F1(n)2.86 E F0(.).24 E F2(!!)108 508.8 Q F0(Refer to the pre)144 508.8 Q(vious command.)-.25 E (This is a synon)5 E(ym for `!\2551'.)-.15 E F2(!)108 520.8 Q F1(string) A F0 .865(Refer to the most recent command preceding the current positi\ on in the history list starting with)144 520.8 R F1(string)144.34 532.8 Q F0(.).22 E F2(!?)108 544.8 Q F1(string)A F2([?])A F0 1.503(Refer to t\ he most recent command preceding the current position in the history li\ st containing)144 556.8 R F1(string)144.34 568.8 Q F0 5.496(.T).22 G .496(he trailing)-5.496 F F2(?)2.996 E F0 .496(may be omitted if)2.996 F F1(string)3.336 E F0 .497(is follo)3.216 F .497(wed immediately by a ne) -.25 F 2.997(wline. If)-.25 F F1(string)2.997 E F0(is)2.997 E .391(miss\ ing, the string from the most recent search is used; it is an error if \ there is no pre)144 580.8 R .39(vious search)-.25 F(string.)144 592.8 Q /F3 12/Times-Bold@0 SF(^)108 609.8 Q F1(string1)-5 I F3(^)5 I F1 (string2)-5 I F3(^)5 I F0 .752(Quick substitution.)144 616.8 R .752 (Repeat the pre)5.752 F .753(vious command, replacing)-.25 F F1(string1) 3.593 E F0(with)3.253 E F1(string2)3.593 E F0 5.753(.E).02 G(qui)-5.753 E -.25(va)-.25 G .753(lent to).25 F -.74(``)144 628.8 S(!!:s).74 E/F4 12 /Times-Roman@0 SF(^)5 I F1(string1)-5 I F4(^)5 I F1(string2)-5 I F4(^)5 I F0 1.48 -.74('' \()-5 L(see).74 E F2(Modi\214ers)2.5 E F0(belo)2.5 E (w\).)-.25 E F2(!#)108 640.8 Q F0(The entire command line typed so f)144 640.8 Q(ar)-.1 E(.)-.55 E F2 -.75(Wo)87 657.6 S(rd Designators).75 E F0 -.8(Wo)108 669.6 S 1.314(rd designators are used to select desired w).8 F 1.314(ords from the e)-.1 F -.15(ve)-.25 G 3.814(nt. A).15 F F2(:) 3.814 E F0 1.313(separates the e)3.813 F -.15(ve)-.25 G 1.313 (nt speci\214cation).15 F .529(from the w)108 681.6 R .529 (ord designator)-.1 F 5.529(.I)-.55 G 3.029(tm)-5.529 G .529 (ay be omitted if the w)-3.029 F .529(ord designator be)-.1 F .529 (gins with a)-.15 F F2(^)3.029 E F0(,)A F2($)3.029 E F0(,)A F2(*)3.029 E F0(,)A F23.029 E F0 3.029(,o)C(r)-3.029 E F2(%)3.029 E F0 5.53(.W)C (ords)-6.33 E .516(are numbered from the be)108 693.6 R .516 (ginning of the line, with the \214rst w)-.15 F .516 (ord being denoted by 0 \(zero\).)-.1 F -.8(Wo)5.515 G .515(rds are in-) .8 F(serted into the current line separated by single spaces.)108 705.6 Q(GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(55)190.395 E 0 Cg EP %%Page: 56 56 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10/Times-Bold@0 SF 2.5(0\()108 84 S(zer)-2.5 E(o\))-.18 E F0(The zeroth w)144 96 Q 2.5 (ord. F)-.1 F(or the shell, this is the command w)-.15 E(ord.)-.1 E/F2 10/Times-Italic@0 SF(n)108.36 108 Q F0(The)144 108 Q F2(n)2.5 E F0(th w) A(ord.)-.1 E F1(^)108 120 Q F0(The \214rst ar)144 120 Q 2.5 (gument. That)-.18 F(is, w)2.5 E(ord 1.)-.1 E F1($)108 132 Q F0 .063 (The last w)144 132 R 2.563(ord. This)-.1 F .063(is usually the last ar) 2.563 F .064(gument, b)-.18 F .064(ut will e)-.2 F .064 (xpand to the zeroth w)-.15 F .064(ord if there is only)-.1 F(one w)144 144 Q(ord in the line.)-.1 E F1(%)108 156 Q F0 1.42(The \214rst w)144 156 R 1.42(ord matched by the most recent `?)-.1 F F2(string)A F0 1.419 (?' search, if the search string be)B 1.419(gins with a)-.15 F (character that is part of a w)144 168 Q(ord.)-.1 E F2(x)108.77 180 Q F1 A F2(y)A F0 2.5(Ar)144 180 S(ange of w)-2.5 E(ords; `\255)-.1 E F2 (y)A F0 2.5('a)C(bbre)-2.5 E(viates `0\255)-.25 E F2(y)A F0('.)A F1(*) 108 192 Q F0 .315(All of the w)144 192 R .315(ords b)-.1 F .315 (ut the zeroth.)-.2 F .315(This is a synon)5.315 F .315(ym for `)-.15 F F2(1\255$)A F0 2.815('. It)B .315(is not an error to use)2.815 F F1(*) 2.816 E F0 .316(if there is)2.816 F(just one w)144 204 Q(ord in the e) -.1 E -.15(ve)-.25 G(nt; the empty string is returned in that case.).15 E F1(x*)108 216 Q F0(Abbre)144 216 Q(viates)-.25 E F2(x\255$)2.5 E F0(.) A F1<78ad>108 228 Q F0(Abbre)144 228 Q(viates)-.25 E F2(x\255$)2.5 E F0 (lik)2.5 E(e)-.1 E F1(x*)2.5 E F0 2.5(,b)C(ut omits the last w)-2.7 E 2.5(ord. If)-.1 F F1(x)2.5 E F0(is missing, it def)2.5 E(aults to 0.)-.1 E(If a w)108 244.8 Q(ord designator is supplied without an e)-.1 E -.15 (ve)-.25 G(nt speci\214cation, the pre).15 E (vious command is used as the e)-.25 E -.15(ve)-.25 G(nt.).15 E F1 (Modi\214ers)87 261.6 Q F0 .184(After the optional w)108 273.6 R .184 (ord designator)-.1 F 2.684(,t)-.4 G .183 (here may appear a sequence of one or more of the follo)-2.684 F .183 (wing modi\214ers,)-.25 F(each preceded by a `:'.)108 285.6 Q (These modify)5 E 2.5(,o)-.65 G 2.5(re)-2.5 G(dit, the w)-2.5 E (ord or w)-.1 E(ords selected from the history e)-.1 E -.15(ve)-.25 G (nt.).15 E F1(h)108 302.4 Q F0(Remo)144 302.4 Q .3 -.15(ve a t)-.15 H (railing \214lename component, lea).15 E(ving only the head.)-.2 E F1(t) 108 314.4 Q F0(Remo)144 314.4 Q .3 -.15(ve a)-.15 H (ll leading \214lename components, lea).15 E(ving the tail.)-.2 E F1(r) 108 326.4 Q F0(Remo)144 326.4 Q .3 -.15(ve a t)-.15 H(railing suf).15 E (\214x of the form)-.25 E F2(.xxx)2.5 E F0 2.5(,l)C(ea)-2.5 E (ving the basename.)-.2 E F1(e)108 338.4 Q F0(Remo)144 338.4 Q .3 -.15 (ve a)-.15 H(ll b).15 E(ut the trailing suf)-.2 E(\214x.)-.25 E F1(p)108 350.4 Q F0(Print the ne)144 350.4 Q 2.5(wc)-.25 G(ommand b)-2.5 E (ut do not e)-.2 E -.15(xe)-.15 G(cute it.).15 E F1(q)108 362.4 Q F0 (Quote the substituted w)144 362.4 Q (ords, escaping further substitutions.)-.1 E F1(x)108 374.4 Q F0 .385 (Quote the substituted w)144 374.4 R .385(ords as with)-.1 F F1(q)2.885 E F0 2.885(,b)C .386(ut break into w)-3.085 F .386(ords at)-.1 F F1 (blanks)2.886 E F0 .386(and ne)2.886 F 2.886(wlines. The)-.25 F F1(q) 2.886 E F0(and)2.886 E F1(x)2.886 E F0(modi\214ers are mutually e)144 386.4 Q(xclusi)-.15 E -.15(ve)-.25 G 2.5(;t).15 G (he last one supplied is used.)-2.5 E F1(s/)108 398.4 Q F2(old)A F1(/)A F2(ne)A(w)-.15 E F1(/)A F0(Substitute)144 410.4 Q F2(ne)3.329 E(w)-.15 E F0 .469(for the \214rst occurrence of)3.279 F F2(old)3.199 E F0 .469 (in the e)3.739 F -.15(ve)-.25 G .469(nt line.).15 F(An)5.469 E 2.969 (yc)-.15 G .469(haracter may be used as the)-2.969 F .953 (delimiter in place of /.)144 422.4 R .953 (The \214nal delimiter is optional if it is the last character of the e) 5.953 F -.15(ve)-.25 G .954(nt line.).15 F .131 (The delimiter may be quoted in)144 434.4 R F2(old)2.861 E F0(and)3.401 E F2(ne)2.991 E(w)-.15 E F0 .131(with a single backslash.)2.941 F .131 (If & appears in)5.131 F F2(ne)2.991 E(w)-.15 E F0 2.631(,i).31 G 2.631 (ti)-2.631 G 2.631(sr)-2.631 G(e-)-2.631 E .619(placed by)144 446.4 R F2 (old)3.349 E F0 5.619(.A).77 G .619(single backslash will quote the &.) -2.5 F(If)5.619 E F2(old)3.349 E F0 .619(is null, it is set to the last) 3.889 F F2(old)3.349 E F0(substi-)3.89 E .487(tuted, or)144 458.4 R 2.987(,i)-.4 G 2.987(fn)-2.987 G 2.987(op)-2.987 G(re)-2.987 E .486 (vious history substitutions took place, the last)-.25 F F2(string)3.326 E F0 .486(in a)3.206 F F1(!?)2.986 E F2(string)A F1([?])A F0 2.986 (search. If)5.486 F F2(ne)144.36 470.4 Q(w)-.15 E F0 (is null, each matching)2.81 E F2(old)2.73 E F0(is deleted.)3.27 E F1(&) 108 482.4 Q F0(Repeat the pre)144 482.4 Q(vious substitution.)-.25 E F1 (g)108 494.4 Q F0 .397(Cause changes to be applied o)144 494.4 R -.15 (ve)-.15 G 2.897(rt).15 G .398(he entire e)-2.897 F -.15(ve)-.25 G .398 (nt line.).15 F .398(This is used in conjunction with `)5.398 F F1(:s)A F0 2.898('\()C(e.g.,)-2.898 E(`)144 506.4 Q F1(:gs/)A F2(old)A F1(/)A F2 (ne)A(w)-.15 E F1(/)A F0 .351('\) or `)B F1(:&)A F0 2.851('. If)B .351 (used with `)2.851 F F1(:s)A F0 .351(', an)B 2.851(yd)-.15 G .35 (elimiter can be used in place of /, and the \214nal de-)-2.851 F (limiter is optional if it is the last character of the e)144 518.4 Q -.15(ve)-.25 G(nt line.).15 E(An)5 E F1(a)2.5 E F0 (may be used as a synon)2.5 E(ym for)-.15 E F1(g)2.5 E F0(.)A F1(G)108 530.4 Q F0(Apply the follo)144 530.4 Q(wing `)-.25 E F1(s)A F0 2.5('o)C 2.5(r`)-2.5 G F1(&)-2.5 E F0 2.5('m)C(odi\214er once to each w)-2.5 E (ord in the e)-.1 E -.15(ve)-.25 G(nt line.).15 E/F3 10.95/Times-Bold@0 SF(SHELL B)72 547.2 Q(UIL)-.11 E(TIN COMMANDS)-1.007 E F0 .062 (Unless otherwise noted, each b)108 559.2 R .062(uiltin command documen\ ted in this section as accepting options preceded by)-.2 F F1108 571.2 Q F0(accepts)3.077 E F13.077 E F0 .577 (to signify the end of the options.)3.077 F(The)5.577 E F1(:)3.077 E F0 (,)A F1(true)3.077 E F0(,)A F1(false)3.077 E F0 3.077(,a)C(nd)-3.077 E F1(test)3.077 E F0(/)A F1([)A F0 -.2(bu)3.077 G .577 (iltins do not accept options).2 F .461(and do not treat)108 583.2 R F1 2.961 E F0(specially)2.961 E 5.461(.T)-.65 G(he)-5.461 E F1(exit) 2.961 E F0(,)A F1(logout)2.961 E F0(,)A F1 -.18(re)2.961 G(tur).18 E(n) -.15 E F0(,)A F1(br)2.961 E(eak)-.18 E F0(,)A F1(continue)2.961 E F0(,)A F1(let)2.961 E F0 2.961(,a)C(nd)-2.961 E F1(shift)2.961 E F0 -.2(bu) 2.962 G .462(iltins accept and).2 F .261(process ar)108 595.2 R .261 (guments be)-.18 F .261(ginning with)-.15 F F12.761 E F0 .261 (without requiring)2.761 F F12.761 E F0 5.261(.O)C .261(ther b) -5.261 F .26(uiltins that accept ar)-.2 F .26(guments b)-.18 F .26 (ut are not)-.2 F 1.154(speci\214ed as accepting options interpret ar) 108 607.2 R 1.154(guments be)-.18 F 1.154(ginning with)-.15 F F1 3.654 E F0 1.154(as in)3.654 F -.25(va)-.4 G 1.154 (lid options and require).25 F F13.654 E F0(to)3.654 E(pre)108 619.2 Q -.15(ve)-.25 G(nt this interpretation.).15 E F1(:)108 637.2 Q F0 ([)2.5 E F2(ar)A(guments)-.37 E F0(])A .452(No ef)144 649.2 R .452 (fect; the command does nothing be)-.25 F .452(yond e)-.15 F(xpanding) -.15 E F2(ar)3.282 E(guments)-.37 E F0 .451(and performing an)3.221 F 2.951(ys)-.15 G(peci\214ed)-2.951 E 2.5(redirections. The)144 661.2 R (return status is zero.)2.5 E F1(.)110.5 678 Q F2(\214lename)6.666 E F0 ([)2.5 E F2(ar)A(guments)-.37 E F0(])A F1(sour)108 690 Q(ce)-.18 E F2 (\214lename)2.5 E F0([)2.5 E F2(ar)A(guments)-.37 E F0(])A 1.02 (Read and e)144 702 R -.15(xe)-.15 G 1.02(cute commands from).15 F F2 (\214lename)5.43 E F0 1.02(in the current shell en)3.7 F 1.02 (vironment and return the e)-.4 F(xit)-.15 E 1.331 (status of the last command e)144 714 R -.15(xe)-.15 G 1.331(cuted from) .15 F F2(\214lename)5.741 E F0 6.331(.I).18 G(f)-6.331 E F2(\214lename) 5.741 E F0 1.33(does not contain a slash, \214le-)4.011 F .488(names in) 144 726 R/F4 9/Times-Bold@0 SF -.666(PA)2.988 G(TH)-.189 E F0 .488 (are used to \214nd the directory containing)2.738 F F2(\214lename)4.899 E F0 5.489(.T).18 G .489(he \214le searched for in)-5.489 F F4 -.666(PA) 2.989 G(TH)-.189 E F0(GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E (56)190.395 E 0 Cg EP %%Page: 57 57 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E .833 (need not be e)144 84 R -.15(xe)-.15 G 3.333(cutable. When).15 F/F1 10 /Times-Bold@0 SF(bash)3.333 E F0 .832(is not in)3.333 F/F2 10 /Times-Italic@0 SF .832(posix mode)3.332 F F0 3.332(,t)C .832 (he current directory is searched if no)-3.332 F .981 (\214le is found in)144 96 R/F3 9/Times-Bold@0 SF -.666(PA)3.481 G(TH) -.189 E/F4 9/Times-Roman@0 SF(.)A F0 .981(If the)5.481 F F1(sour)3.481 E (cepath)-.18 E F0 .981(option to the)3.481 F F1(shopt)3.481 E F0 -.2(bu) 3.481 G .981(iltin command is turned of).2 F .982(f, the)-.25 F F3 -.666 (PA)144 108 S(TH)-.189 E F0 .112(is not searched.)2.363 F .112(If an) 5.112 F(y)-.15 E F2(ar)2.612 E(guments)-.37 E F0 .112(are supplied, the) 2.612 F 2.612(yb)-.15 G .112(ecome the positional parameters when)-2.612 F F2(\214lename)144 120 Q F0 .485(is e)2.985 F -.15(xe)-.15 G 2.985 (cuted. Otherwise).15 F .485(the positional parameters are unchanged.) 2.985 F .485(If the)5.485 F F12.985 E F0 .485(option is en-)2.985 F(abled,)144 132 Q F1(sour)3.325 E(ce)-.18 E F0 .825(inherits an)3.325 F 3.325(yt)-.15 G .825(rap on)-3.325 F F1(DEB)3.325 E(UG)-.1 E F0 3.325 (;i)C 3.325(fi)-3.325 G 3.324(ti)-3.325 G 3.324(sn)-3.324 G .824(ot, an) -3.324 F(y)-.15 E F1(DEB)3.324 E(UG)-.1 E F0 .824(trap string is sa) 3.324 F -.15(ve)-.2 G 3.324(da).15 G .824(nd re-)-3.324 F .817 (stored around the call to)144 144 R F1(sour)3.317 E(ce)-.18 E F0 3.317 (,a)C(nd)-3.317 E F1(sour)3.317 E(ce)-.18 E F0 .817(unsets the)3.317 F F1(DEB)3.317 E(UG)-.1 E F0 .817(trap while it e)3.317 F -.15(xe)-.15 G 3.317(cutes. If).15 F F13.317 E F0(is)3.318 E 1.435 (not set, and the sourced \214le changes the)144 156 R F1(DEB)3.935 E (UG)-.1 E F0 1.435(trap, the ne)3.935 F 3.935(wv)-.25 G 1.435 (alue is retained when)-4.185 F F1(sour)3.935 E(ce)-.18 E F0 3.762 (completes. The)144 168 R 1.262 (return status is the status of the last command e)3.762 F 1.263 (xited within the script \(0 if no)-.15 F(commands are e)144 180 Q -.15 (xe)-.15 G(cuted\), and f).15 E(alse if)-.1 E F2(\214lename)4.41 E F0 (is not found or cannot be read.)2.68 E F1(alias)108 196.8 Q F0([)2.5 E F1A F0 2.5(][)C F2(name)-2.5 E F0([=)A F2(value)A F0 2.5(].)C(..]) -2.5 E F1(Alias)144 208.8 Q F0 2.725(with no ar)5.225 F 2.724 (guments or with the)-.18 F F15.224 E F0 2.724 (option prints the list of aliases in the form)5.224 F F1(alias)5.224 E F2(name)144 220.8 Q F0(=)A F2(value)A F0 .58(on standard output.)3.08 F .58(When ar)5.58 F .58 (guments are supplied, an alias is de\214ned for each)-.18 F F2(name) 3.08 E F0(whose)144 232.8 Q F2(value)2.509 E F0 .009(is gi)2.509 F -.15 (ve)-.25 G 2.509(n. A).15 F .009(trailing space in)2.509 F F2(value) 2.509 E F0 .009(causes the ne)2.509 F .009(xt w)-.15 F .009 (ord to be check)-.1 F .008(ed for alias substi-)-.1 F .579 (tution when the alias is e)144 244.8 R 3.079(xpanded. F)-.15 F .579 (or each)-.15 F F2(name)3.079 E F0 .579(in the ar)3.079 F .579 (gument list for which no)-.18 F F2(value)3.079 E F0 .579(is sup-)3.079 F 1.314(plied, the name and v)144 256.8 R 1.314 (alue of the alias is printed.)-.25 F F1(Alias)6.314 E F0 1.314 (returns true unless a)3.814 F F2(name)3.814 E F0 1.313(is gi)3.814 F -.15(ve)-.25 G 3.813(nf).15 G(or)-3.813 E (which no alias has been de\214ned.)144 268.8 Q F1(bg)108 285.6 Q F0([) 2.5 E F2(jobspec)A F0(...])2.5 E .744(Resume each suspended job)144 297.6 R F2(jobspec)3.244 E F0 .745 (in the background, as if it had been started with)3.244 F F1(&)3.245 E F0 5.745(.I)C(f)-5.745 E F2(job-)4.985 E(spec)144 309.6 Q F0 .672 (is not present, the shell')3.482 F 3.172(sn)-.55 G .672(otion of the) -3.172 F F2(curr)3.172 E .672(ent job)-.37 F F0 .672(is used.)3.172 F F1 (bg)5.671 E F2(jobspec)4.911 E F0 .671(returns 0 unless run)3.481 F .418 (when job control is disabled or)144 321.6 R 2.919(,w)-.4 G .419 (hen run with job control enabled, an)-2.919 F 2.919(ys)-.15 G (peci\214ed)-2.919 E F2(jobspec)2.919 E F0 -.1(wa)2.919 G 2.919(sn).1 G (ot)-2.919 E(found or w)144 333.6 Q(as started without job control.)-.1 E F1(bind)108 350.4 Q F0([)2.5 E F1A F2 -.1(ke)2.5 G(ymap)-.2 E F0 2.5(][)C F1(\255lpsvPSVX)-2.5 E F0(])A F1(bind)108 362.4 Q F0([)2.5 E F1 A F2 -.1(ke)2.5 G(ymap)-.2 E F0 2.5(][)C F1-2.5 E F2 (function)2.5 E F0 2.5(][)C F1-2.5 E F2(function)2.5 E F0 2.5(][)C F1-2.5 E F2 -.1(ke)2.5 G(yseq)-.2 E F0(])A F1(bind)108 374.4 Q F0 ([)2.5 E F1A F2 -.1(ke)2.5 G(ymap)-.2 E F0(])A F12.5 E F2 (\214lename)2.5 E F1(bind)108 386.4 Q F0([)2.5 E F1A F2 -.1(ke)2.5 G(ymap)-.2 E F0(])A F12.5 E F2 -.1(ke)2.5 G(yseq)-.2 E F0(:)A F2 (shell\255command)A F1(bind)108 398.4 Q F0([)2.5 E F1A F2 -.1(ke) 2.5 G(ymap)-.2 E F0(])A F2 -.1(ke)2.5 G(yseq)-.2 E F0(:)A F2 (function\255name)A F1(bind)108 410.4 Q F0([)2.5 E F1A F2 -.1(ke) 2.5 G(ymap)-.2 E F0(])A F2 -.1(ke)2.5 G(yseq)-.2 E F0(:)A F2 -.37(re)C (adline\255command).37 E F0 .239(Display current)144 422.4 R F1 -.18(re) 2.739 G(adline).18 E F0 -.1(ke)2.739 G 2.739(ya)-.05 G .239 (nd function bindings, bind a k)-2.739 F .539 -.15(ey s)-.1 H .238 (equence to a).15 F F1 -.18(re)2.738 G(adline).18 E F0 .238(function or) 2.738 F .475(macro, or set a)144 434.4 R F1 -.18(re)2.975 G(adline).18 E F0 -.25(va)2.975 G 2.975(riable. Each).25 F .476(non-option ar)2.976 F .476(gument is a command as it w)-.18 F .476(ould appear in)-.1 F F2 (.inputr)144.23 446.4 Q(c)-.37 E F0 2.968(,b).31 G .467 (ut each binding or command must be passed as a separate ar)-3.168 F .467(gument; e.g., '"\\C\255x\\C\255r":)-.18 F 2.5 (re\255read\255init\255\214le'. Options,)144 458.4 R(if supplied, ha)2.5 E .3 -.15(ve t)-.2 H(he follo).15 E(wing meanings:)-.25 E F1144 470.4 Q F2 -.1(ke)2.5 G(ymap)-.2 E F0(Use)180 482.4 Q F2 -.1(ke)5.158 G (ymap)-.2 E F0 2.658(as the k)5.348 F -.15(ey)-.1 G 2.658(map to be af) .15 F 2.659(fected by the subsequent bindings.)-.25 F(Acceptable)7.659 E F2 -.1(ke)180 494.4 S(ymap)-.2 E F0 3.193(names are)5.883 F F2 3.193 (emacs, emacs\255standar)5.693 F 3.192 (d, emacs\255meta, emacs\255ctlx, vi, vi\255mo)-.37 F(ve)-.1 E(,)-.1 E (vi\255command)180 506.4 Q F0 4.089(,a)C(nd)-4.089 E F2(vi\255insert) 4.379 E F0(.).68 E F2(vi)6.589 E F0 1.589(is equi)4.089 F -.25(va)-.25 G 1.589(lent to).25 F F2(vi\255command)4.089 E F0(\()4.089 E F2(vi\255mo)A (ve)-.1 E F0 1.59(is also a syn-)4.089 F(on)180 518.4 Q(ym\);)-.15 E F2 (emacs)2.5 E F0(is equi)2.5 E -.25(va)-.25 G(lent to).25 E F2 (emacs\255standar)2.5 E(d)-.37 E F0(.)A F1144 530.4 Q F0 (List the names of all)180 530.4 Q F1 -.18(re)2.5 G(adline).18 E F0 (functions.)2.5 E F1144 542.4 Q F0(Display)180 542.4 Q F1 -.18(re) 2.5 G(adline).18 E F0(function names and bindings in such a w)2.5 E (ay that the)-.1 E 2.5(yc)-.15 G(an be re-read.)-2.5 E F1144 554.4 Q F0(List current)180 554.4 Q F1 -.18(re)2.5 G(adline).18 E F0 (function names and bindings.)2.5 E F1144 566.4 Q F0(Display)180 566.4 Q F1 -.18(re)3.655 G(adline).18 E F0 -.1(ke)3.655 G 3.655(ys)-.05 G 1.155(equences bound to macros and the strings the)-3.655 F 3.655(yo) -.15 G 1.155(utput in such a)-3.655 F -.1(wa)180 578.4 S 2.5(yt).1 G (hat the)-2.5 E 2.5(yc)-.15 G(an be re-read.)-2.5 E F1144 590.4 Q F0(Display)180 590.4 Q F1 -.18(re)2.5 G(adline).18 E F0 -.1(ke)2.5 G 2.5 (ys)-.05 G(equences bound to macros and the strings the)-2.5 E 2.5(yo) -.15 G(utput.)-2.5 E F1144 602.4 Q F0(Display)180 602.4 Q F1 -.18 (re)2.5 G(adline).18 E F0 -.25(va)2.5 G(riable names and v).25 E (alues in such a w)-.25 E(ay that the)-.1 E 2.5(yc)-.15 G (an be re-read.)-2.5 E F1144 614.4 Q F0(List current)180 614.4 Q F1 -.18(re)2.5 G(adline).18 E F0 -.25(va)2.5 G(riable names and v).25 E (alues.)-.25 E F1144 626.4 Q F2(\214lename)2.5 E F0(Read k)180 638.4 Q .3 -.15(ey b)-.1 H(indings from).15 E F2(\214lename)2.5 E F0(.)A F1144 650.4 Q F2(function)2.5 E F0(Query about which k)180 662.4 Q -.15(ey)-.1 G 2.5(si).15 G -1.9 -.4(nv o)-2.5 H .2 -.1(ke t).4 H (he named).1 E F2(function)2.5 E F0(.)A F1144 674.4 Q F2(function) 2.5 E F0(Unbind all k)180 686.4 Q -.15(ey)-.1 G 2.5(sb).15 G (ound to the named)-2.5 E F2(function)2.5 E F0(.)A F1144 698.4 Q F2 -.1(ke)2.5 G(yseq)-.2 E F0(Remo)180 710.4 Q .3 -.15(ve a)-.15 H .3 -.15(ny c).15 H(urrent binding for).15 E F2 -.1(ke)2.5 G(yseq)-.2 E F0 (.)A(GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(57)190.395 E 0 Cg EP %%Page: 58 58 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10/Times-Bold@0 SF144 84 Q/F2 10/Times-Italic@0 SF -.1(ke)2.5 G(yseq)-.2 E F1(:)A F2(shell\255command)A F0(Cause)180 96 Q F2(shell\255command)4.325 E F0 1.825(to be e)4.325 F -.15(xe)-.15 G 1.825(cuted whene).15 F -.15(ve) -.25 G(r).15 E F2 -.1(ke)4.325 G(yseq)-.2 E F0 1.825(is entered.)4.325 F (When)6.825 E F2(shell\255com-)4.325 E(mand)180 108 Q F0 1.765(is e) 4.265 F -.15(xe)-.15 G 1.765(cuted, the shell sets the).15 F/F3 9 /Times-Bold@0 SF(READLINE_LINE)4.265 E F0 -.25(va)4.015 G 1.765 (riable to the contents of the).25 F F1 -.18(re)180 120 S(adline).18 E F0 .375(line b)2.874 F(uf)-.2 E .375(fer and the)-.25 F F3 (READLINE_POINT)2.875 E F0(and)2.625 E F3(READLINE_MARK)2.875 E F0 -.25 (va)2.625 G .375(riables to the).25 F 1.186 (current location of the insertion point and the sa)180 132 R -.15(ve) -.2 G 3.685(di).15 G 1.185(nsertion point \(the mark\), respec-)-3.685 F (ti)180 144 Q -.15(ve)-.25 G(ly).15 E 5.701(.I)-.65 G 3.201(ft)-5.701 G .701(he e)-3.201 F -.15(xe)-.15 G .701(cuted command changes the v).15 F .702(alue of an)-.25 F 3.202(yo)-.15 G(f)-3.202 E F3(READLINE_LINE)3.202 E/F4 9/Times-Roman@0 SF(,)A F3(READ-)2.952 E(LINE_POINT)180 156 Q F4(,)A F0(or)3.581 E F3(READLINE_MARK)3.831 E F4(,)A F0 1.331(those ne)3.581 F 3.831(wv)-.25 G 1.33(alues will be re\215ected in the editing)-4.081 F (state.)180 168 Q F1144 180 Q F0 .829(List all k)180 180 R 1.129 -.15(ey s)-.1 H .829 (equences bound to shell commands and the associated commands in a for) .15 F(-)-.2 E(mat that can be reused as input.)180 192 Q(The return v) 144 208.8 Q(alue is 0 unless an unrecognized option is gi)-.25 E -.15 (ve)-.25 G 2.5(no).15 G 2.5(ra)-2.5 G 2.5(ne)-2.5 G(rror occurred.)-2.5 E F1(br)108 225.6 Q(eak)-.18 E F0([)2.5 E F2(n)A F0(])A .055 (Exit from within a)144 237.6 R F1 -.25(fo)2.555 G(r).25 E F0(,)A F1 (while)2.555 E F0(,)A F1(until)2.555 E F0 2.555(,o)C(r)-2.555 E F1 (select)2.555 E F0 2.555(loop. If)2.555 F F2(n)2.555 E F0 .055 (is speci\214ed, break)2.555 F F2(n)2.555 E F0(le)2.555 E -.15(ve)-.25 G (ls.).15 E F2(n)5.414 E F0 .054(must be)2.794 F/F5 10/Symbol SF2.554 E F0(1.)2.554 E(If)144 249.6 Q F2(n)3.074 E F0 .215(is greater than the\ number of enclosing loops, all enclosing loops are e)2.954 F 2.715 (xited. The)-.15 F .215(return v)2.715 F(alue)-.25 E(is 0 unless)144 261.6 Q F2(n)2.5 E F0(is not greater than or equal to 1.)2.5 E F1 -.2 (bu)108 278.4 S(iltin).2 E F2(shell\255b)2.5 E(uiltin)-.2 E F0([)2.5 E F2(ar)A(guments)-.37 E F0(])A(Ex)144 290.4 Q .771 (ecute the speci\214ed shell b)-.15 F .771(uiltin, passing it)-.2 F F2 (ar)3.601 E(guments)-.37 E F0 3.271(,a).27 G .771(nd return its e)-3.271 F .77(xit status.)-.15 F .77(This is useful)5.77 F .615 (when de\214ning a function whose name is the same as a shell b)144 302.4 R .616(uiltin, retaining the functionality of)-.2 F .57(the b)144 314.4 R .57(uiltin within the function.)-.2 F(The)5.57 E F1(cd)3.07 E F0 -.2(bu)3.07 G .57(iltin is commonly rede\214ned this w).2 F(ay)-.1 E 5.57(.T)-.65 G .57(he return status)-5.57 F(is f)144 326.4 Q(alse if)-.1 E F2(shell\255b)2.84 E(uiltin)-.2 E F0(is not a shell b)2.74 E (uiltin command.)-.2 E F1(caller)108 343.2 Q F0([)2.5 E F2 -.2(ex)C(pr) .2 E F0(])A .253(Returns the conte)144 355.2 R .254(xt of an)-.15 F 2.754(ya)-.15 G(cti)-2.754 E .554 -.15(ve s)-.25 H .254 (ubroutine call \(a shell function or a script e).15 F -.15(xe)-.15 G .254(cuted with the).15 F F1(.)2.754 E F0(or)2.754 E F1(sour)144 367.2 Q (ce)-.18 E F0 -.2(bu)2.825 G 2.825(iltins\). W).2 F(ithout)-.4 E F2 -.2 (ex)2.825 G(pr).2 E F0(,)A F1(caller)2.825 E F0 .324 (displays the line number and source \214lename of the current)2.824 F .253(subroutine call.)144 379.2 R .253(If a non-ne)5.253 F -.05(ga)-.15 G(ti).05 E .553 -.15(ve i)-.25 H(nte).15 E .253(ger is supplied as)-.15 F F2 -.2(ex)2.753 G(pr).2 E F0(,)A F1(caller)2.753 E F0 .254 (displays the line number)2.754 F 2.754(,s)-.4 G(ub-)-2.754 E 1.327(rou\ tine name, and source \214le corresponding to that position in the curr\ ent e)144 391.2 R -.15(xe)-.15 G 1.327(cution call stack.).15 F(This e) 144 403.2 Q(xtra information may be used, for e)-.15 E .001 (xample, to print a stack trace.)-.15 F .001(The current frame is frame) 5.001 F 3.02(0. The)144 415.2 R .52(return v)3.02 F .52 (alue is 0 unless the shell is not e)-.25 F -.15(xe)-.15 G .519 (cuting a subroutine call or).15 F F2 -.2(ex)3.019 G(pr).2 E F0 .519 (does not corre-)3.019 F(spond to a v)144 427.2 Q (alid position in the call stack.)-.25 E F1(cd)108 444 Q F0([)2.5 E F1 A F0(|[)A F1A F0([)2.5 E F1A F0(]] [\255@]] [)A F2 (dir)A F0(])A .321(Change the current directory to)144 456 R F2(dir) 2.821 E F0 5.321(.i)C(f)-5.321 E F2(dir)2.821 E F0 .322 (is not supplied, the v)2.821 F .322(alue of the)-.25 F F3(HOME)2.822 E F0 .322(shell v)2.572 F .322(ariable is)-.25 F 1.036(the def)144 468 R 3.536(ault. An)-.1 F 3.536(ya)-.15 G 1.035(dditional ar)-3.536 F 1.035 (guments follo)-.18 F(wing)-.25 E F2(dir)3.535 E F0 1.035(are ignored.) 3.535 F 1.035(The v)6.035 F(ariable)-.25 E F3(CDP)3.535 E -.855(AT)-.666 G(H).855 E F0(de\214nes)3.285 E .826 (the search path for the directory containing)144 480 R F2(dir)3.676 E F0 3.326(:e).73 G .826(ach directory name in)-3.326 F F3(CDP)3.326 E -.855(AT)-.666 G(H).855 E F0 .827(is searched for)3.077 F F2(dir)144 492 Q F0 5.665(.A)C(lternati)-5.665 E .965 -.15(ve d)-.25 H .665 (irectory names in).15 F F3(CDP)3.165 E -.855(AT)-.666 G(H).855 E F0 .665(are separated by a colon \(:\).)2.915 F 3.165(An)5.665 G .664 (ull directory name)-3.165 F(in)144 504 Q F3(CDP)3.101 E -.855(AT)-.666 G(H).855 E F0 .601(is the same as the current directory)2.851 F 3.102 (,i)-.65 G .602(.e., `)-3.102 F(`)-.74 E F1(.)A F0 -.74('')C 5.602(.I) .74 G(f)-5.602 E F2(dir)3.452 E F0(be)3.832 E .602 (gins with a slash \(/\), then)-.15 F F3(CD-)3.102 E -.666(PA)144 516 S (TH)-.189 E F0 1.003(is not used.)3.254 F(The)6.003 E F13.503 E F0 1.003(option causes)3.503 F F1(cd)3.503 E F0 1.003(to use the ph)3.503 F 1.003(ysical directory structure by resolving)-.05 F .123 (symbolic links while tra)144 528 R -.15(ve)-.2 G(rsing).15 E F2(dir) 2.623 E F0 .123(and before processing instances of)2.623 F F2(..)2.623 E F0(in)2.623 E F2(dir)2.623 E F0 .123(\(see also the)2.623 F F1 2.623 E F0(op-)2.623 E .43(tion to the)144 540 R F1(set)2.93 E F0 -.2 (bu)2.93 G .43(iltin command\); the).2 F F12.929 E F0 .429 (option forces symbolic links to be follo)2.929 F .429(wed by resolving) -.25 F .472(the link after processing instances of)144 552 R F2(..)2.972 E F0(in)2.972 E F2(dir)2.973 E F0 5.473(.I)C(f)-5.473 E F2(..)2.973 E F0 .473(appears in)2.973 F F2(dir)2.973 E F0 2.973(,i)C 2.973(ti)-2.973 G 2.973(sp)-2.973 G .473(rocessed by remo)-2.973 F .473(ving the)-.15 F .948(immediately pre)144 564 R .948(vious pathname component from)-.25 F F2(dir)3.448 E F0 3.448(,b)C .948(ack to a slash or the be)-3.448 F .948 (ginning of)-.15 F F2(dir)3.448 E F0 5.948(.I)C(f)-5.948 E(the)144 576 Q F12.868 E F0 .368(option is supplied with)2.868 F F12.868 E F0 2.868(,a)C .368(nd the current w)-2.868 F .368 (orking directory cannot be successfully deter)-.1 F(-)-.2 E .612 (mined after a successful directory change,)144 588 R F1(cd)3.112 E F0 .612(will return an unsuccessful status.)3.112 F .612(On systems that) 5.612 F .353(support it, the)144 600 R F12.853 E F0 .354 (option presents the e)2.853 F .354(xtended attrib)-.15 F .354 (utes associated with a \214le as a directory)-.2 F 5.354(.A)-.65 G(n) -5.354 E(ar)144 612 Q .072(gument of)-.18 F F12.572 E F0 .072 (is con)2.572 F -.15(ve)-.4 G .072(rted to).15 F F3($OLDPWD)2.572 E F0 .072(before the directory change is attempted.)2.322 F .072 (If a non-empty)5.072 F .054(directory name from)144 624 R F3(CDP)2.554 E -.855(AT)-.666 G(H).855 E F0 .054(is used, or if)2.304 F F12.555 E F0 .055(is the \214rst ar)2.555 F .055 (gument, and the directory change is suc-)-.18 F .168 (cessful, the absolute pathname of the ne)144 636 R 2.668(ww)-.25 G .168 (orking directory is written to the standard output.)-2.768 F(The)5.168 E(return v)144 648 Q(alue is true if the directory w)-.25 E (as successfully changed; f)-.1 E(alse otherwise.)-.1 E F1(command)108 664.8 Q F0([)2.5 E F1(\255pVv)A F0(])A F2(command)2.5 E F0([)2.5 E F2 (ar)A(g)-.37 E F0(...])2.5 E(Run)144 676.8 Q F2(command)2.764 E F0(with) 3.334 E F2(ar)2.894 E(gs)-.37 E F0 .065 (suppressing the normal shell function lookup.)2.834 F .065(Only b)5.065 F .065(uiltin commands or)-.2 F .502(commands found in the)144 688.8 R F3 -.666(PA)3.002 G(TH)-.189 E F0 .502(are e)2.752 F -.15(xe)-.15 G 3.002(cuted. If).15 F(the)3.002 E F13.002 E F0 .502(option is gi) 3.002 F -.15(ve)-.25 G .501(n, the search for).15 F F2(command)3.201 E F0(is)3.771 E .399(performed using a def)144 700.8 R .399(ault v)-.1 F .399(alue for)-.25 F F3 -.666(PA)2.899 G(TH)-.189 E F0 .4 (that is guaranteed to \214nd all of the standard utilities.)2.649 F(If) 5.4 E .175(either the)144 712.8 R F12.675 E F0(or)2.675 E F1 2.675 E F0 .175(option is supplied, a description of)2.675 F F2(command) 2.875 E F0 .174(is printed.)3.445 F(The)5.174 E F12.674 E F0 .174 (option causes)2.674 F 3.317(as)144 724.8 S .817(ingle w)-3.317 F .817 (ord indicating the command or \214lename used to in)-.1 F -.2(vo)-.4 G -.1(ke).2 G F2(command)3.618 E F0 .818(to be displayed; the)4.088 F (GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(58)190.395 E 0 Cg EP %%Page: 59 59 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10/Times-Bold@0 SF144 84 Q F0 .25(option produces a more v)2.75 F .25 (erbose description.)-.15 F .249(If the)5.25 F F12.749 E F0(or) 2.749 E F12.749 E F0 .249(option is supplied, the e)2.749 F .249 (xit status)-.15 F 1.004(is 0 if)144 96 R/F2 10/Times-Italic@0 SF (command)3.704 E F0 -.1(wa)4.274 G 3.504(sf).1 G 1.005 (ound, and 1 if not.)-3.504 F 1.005 (If neither option is supplied and an error occurred or)6.005 F F2 (command)144.2 108 Q F0 1.599(cannot be found, the e)4.869 F 1.599 (xit status is 127.)-.15 F 1.599(Otherwise, the e)6.599 F 1.598 (xit status of the)-.15 F F1(command)4.098 E F0 -.2(bu)144 120 S (iltin is the e).2 E(xit status of)-.15 E F2(command)2.7 E F0(.).77 E F1 (compgen)108 136.8 Q F0([)2.5 E F2(option)A F0 2.5(][)C F2(wor)-2.5 E(d) -.37 E F0(])A .012(Generate possible completion matches for)144 148.8 R F2(wor)2.513 E(d)-.37 E F0 .013(according to the)2.513 F F2(option)2.513 E F0 .013(s, which may be an)B 2.513(yo)-.15 G(ption)-2.513 E .982 (accepted by the)144 160.8 R F1(complete)3.482 E F0 -.2(bu)3.481 G .981 (iltin with the e).2 F .981(xception of)-.15 F F13.481 E F0(and) 3.481 E F13.481 E F0 3.481(,a)C .981(nd write the matches to the) -3.481 F .13(standard output.)144 172.8 R .13(When using the)5.13 F F1 2.63 E F0(or)2.63 E F12.631 E F0 .131(options, the v)2.631 F .131(arious shell v)-.25 F .131(ariables set by the program-)-.25 F (mable completion f)144 184.8 Q(acilities, while a)-.1 E -.25(va)-.2 G (ilable, will not ha).25 E .3 -.15(ve u)-.2 H(seful v).15 E(alues.)-.25 E .352(The matches will be generated in the same w)144 208.8 R .352 (ay as if the programmable completion code had gen-)-.1 F .02(erated th\ em directly from a completion speci\214cation with the same \215ags.)144 220.8 R(If)5.02 E F2(wor)2.52 E(d)-.37 E F0 .02(is speci\214ed, only) 2.52 F(those completions matching)144 232.8 Q F2(wor)2.5 E(d)-.37 E F0 (will be displayed.)2.5 E(The return v)144 256.8 Q (alue is true unless an in)-.25 E -.25(va)-.4 G (lid option is supplied, or no matches were generated.).25 E F1 (complete)108 273.6 Q F0([)2.5 E F1(\255abcdefgjksuv)A F0 2.5(][)C F1 -2.5 E F2(comp-option)2.5 E F0 2.5(][)C F1(\255DEI)-2.5 E F0 2.5 (][)C F1-2.5 E F2(action)2.5 E F0 2.5(][)C F1-2.5 E F2 (globpat)2.5 E F0 2.5(][)C F1-2.5 E F2(wor)2.5 E(dlist)-.37 E F0 (])A([)144 285.6 Q F1A F2(function)2.5 E F0 2.5(][)C F1-2.5 E F2(command)2.5 E F0 2.5(][)C F1-2.5 E F2(\214lterpat)2.5 E F0 2.5(][)C F1-2.5 E F2(pr)2.5 E(e\214x)-.37 E F0 2.5(][)C F1 -2.5 E F2(suf)2.5 E<8c78>-.18 E F0(])A F2(name)2.5 E F0([)2.5 E F2 (name ...)A F0(])A F1(complete \255pr)108 297.6 Q F0([)2.5 E F1(\255DEI) A F0 2.5(][)C F2(name)-2.5 E F0(...])2.5 E .634(Specify ho)144 309.6 R 3.134(wa)-.25 G -.18(rg)-3.134 G .634(uments to each).18 F F2(name)3.134 E F0 .634(should be completed.)3.134 F .633(If the)5.634 F F13.133 E F0 .633(option is supplied, or if no)3.133 F .139 (options are supplied, e)144 321.6 R .139 (xisting completion speci\214cations are printed in a w)-.15 F .14 (ay that allo)-.1 F .14(ws them to be)-.25 F .31(reused as input.)144 333.6 R(The)5.31 E F12.81 E F0 .31(option remo)2.81 F -.15(ve)-.15 G 2.81(sac).15 G .31(ompletion speci\214cation for each)-2.81 F F2(name) 2.81 E F0 2.81(,o)C 1.11 -.4(r, i)-2.81 H 2.81(fn).4 G(o)-2.81 E F2 (name)2.81 E F0(s)A 1.207 (are supplied, all completion speci\214cations.)144 345.6 R(The)6.207 E F13.707 E F0 1.208(option indicates that other supplied options) 3.708 F .5(and actions should apply to the `)144 357.6 R(`def)-.74 E (ault')-.1 E 3('c)-.74 G .5 (ommand completion; that is, completion attempted on)-3 F 3.455(ac)144 369.6 S .955(ommand for which no completion has pre)-3.455 F .955 (viously been de\214ned.)-.25 F(The)5.955 E F13.455 E F0 .955 (option indicates that)3.455 F .876 (other supplied options and actions should apply to `)144 381.6 R (`empty')-.74 E 3.376('c)-.74 G .876(ommand completion; that is, com-) -3.376 F .447(pletion attempted on a blank line.)144 393.6 R(The)5.447 E F12.947 E F0 .448 (option indicates that other supplied options and actions)2.947 F .123 (should apply to completion on the initial non-assignment w)144 405.6 R .123(ord on the line, or after a command de-)-.1 F 1.02(limiter such as) 144 417.6 R F1(;)3.52 E F0(or)3.52 E F1(|)3.52 E F0 3.52(,w)C 1.021 (hich is usually command name completion.)-3.52 F 1.021 (If multiple options are sup-)6.021 F .708(plied, the)144 429.6 R F1 3.208 E F0 .708(option tak)3.208 F .708(es precedence o)-.1 F -.15 (ve)-.15 G(r).15 E F13.208 E F0 3.208(,a)C .708(nd both tak)-3.208 F 3.208(ep)-.1 G .707(recedence o)-3.208 F -.15(ve)-.15 G(r).15 E F1 3.207 E F0 5.707(.I)C 3.207(fa)-5.707 G 1.007 -.15(ny o)-3.207 H (f).15 E F13.207 E F0(,)A F1144 441.6 Q F0 2.603(,o)C(r) -2.603 E F12.603 E F0 .103(are supplied, an)2.603 F 2.603(yo)-.15 G(ther)-2.603 E F2(name)2.603 E F0(ar)2.603 E .103 (guments are ignored; these completions only apply to the)-.18 F (case speci\214ed by the option.)144 453.6 Q .153 (The process of applying these completion speci\214cations when w)144 477.6 R .152(ord completion is attempted is de-)-.1 F(scribed abo)144 489.6 Q .3 -.15(ve u)-.15 H(nder).15 E F1(Pr)2.5 E (ogrammable Completion)-.18 E F0(.)A .555 (Other options, if speci\214ed, ha)144 513.6 R .855 -.15(ve t)-.2 H .555 (he follo).15 F .555(wing meanings.)-.25 F .555(The ar)5.555 F .555 (guments to the)-.18 F F13.056 E F0(,)A F13.056 E F0 3.056 (,a)C(nd)-3.056 E F13.056 E F0 .723(options \(and, if necessary) 144 525.6 R 3.223(,t)-.65 G(he)-3.223 E F13.223 E F0(and)3.223 E F13.223 E F0 .722 (options\) should be quoted to protect them from e)3.223 F(xpan-)-.15 E (sion before the)144 537.6 Q F1(complete)2.5 E F0 -.2(bu)2.5 G (iltin is in).2 E -.2(vo)-.4 G -.1(ke).2 G(d.).1 E F1144 549.6 Q F2(comp-option)2.5 E F0(The)184 561.6 Q F2(comp-option)2.79 E F0 .291 (controls se)2.791 F -.15(ve)-.25 G .291(ral aspects of the compspec') .15 F 2.791(sb)-.55 G(eha)-2.791 E .291(vior be)-.2 F .291 (yond the simple)-.15 F(generation of completions.)184 573.6 Q F2 (comp-option)5 E F0(may be one of:)2.5 E F1(bashdefault)184 585.6 Q F0 .281(Perform the rest of the def)224 597.6 R(ault)-.1 E F1(bash)2.781 E F0 .281(completions if the compspec generates no)2.781 F(matches.)224 609.6 Q F1(default)184 621.6 Q F0 2.875(Use readline')224 621.6 R 5.375 (sd)-.55 G(ef)-5.375 E 2.876 (ault \214lename completion if the compspec generates no)-.1 F(matches.) 224 633.6 Q F1(dir)184 645.6 Q(names)-.15 E F0(Perform directory name c\ ompletion if the compspec generates no matches.)224 657.6 Q F1 (\214lenames)184 669.6 Q F0 -.7(Te)224 681.6 S .137(ll readline that th\ e compspec generates \214lenames, so it can perform an).7 F 2.636<798c> -.15 G(le-)-2.636 E .134(name\255speci\214c processing \(lik)224 693.6 R 2.634(ea)-.1 G .134(dding a slash to directory names, quoting spe-) -2.634 F .45(cial characters, or suppressing trailing spaces\).)224 705.6 R .45(Intended to be used with shell)5.45 F(functions.)224 717.6 Q (GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(59)190.395 E 0 Cg EP %%Page: 60 60 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10/Times-Bold@0 SF(noquote)184 84 Q F0 -.7(Te)224 84 S .814 (ll readline not to quote the completed w).7 F .814(ords if the)-.1 F 3.314(ya)-.15 G .815(re \214lenames \(quoting)-3.314 F (\214lenames is the def)224 96 Q(ault\).)-.1 E F1(nosort)184 108 Q F0 -.7(Te)224 108 S(ll readline not to sort the list of possible completio\ ns alphabetically).7 E(.)-.65 E F1(nospace)184 120 Q F0 -.7(Te)224 120 S .22(ll readline not to append a space \(the def).7 F .22(ault\) to w)-.1 F .22(ords completed at the end)-.1 F(of the line.)224 132 Q F1 (plusdirs)184 144 Q F0 1.985(After an)224 144 R 4.485(ym)-.15 G 1.985 (atches de\214ned by the compspec are generated, directory name)-4.485 F .584(completion is attempted and an)224 156 R 3.084(ym)-.15 G .584 (atches are added to the results of the other)-3.084 F(actions.)224 168 Q F1144 180 Q/F2 10/Times-Italic@0 SF(action)2.5 E F0(The)184 192 Q F2(action)2.5 E F0(may be one of the follo)2.5 E (wing to generate a list of possible completions:)-.25 E F1(alias)184 204 Q F0(Alias names.)224 204 Q(May also be speci\214ed as)5 E F1 2.5 E F0(.)A F1(arrayv)184 216 Q(ar)-.1 E F0(Array v)224 228 Q (ariable names.)-.25 E F1(binding)184 240 Q(Readline)224 240 Q F0 -.1 (ke)2.5 G 2.5(yb)-.05 G(inding names.)-2.5 E F1 -.2(bu)184 252 S(iltin) .2 E F0(Names of shell b)224 252 Q(uiltin commands.)-.2 E (May also be speci\214ed as)5 E F12.5 E F0(.)A F1(command)184 264 Q F0(Command names.)224 276 Q(May also be speci\214ed as)5 E F12.5 E F0(.)A F1(dir)184 288 Q(ectory)-.18 E F0(Directory names.)224 300 Q (May also be speci\214ed as)5 E F12.5 E F0(.)A F1(disabled)184 312 Q F0(Names of disabled shell b)224 324 Q(uiltins.)-.2 E F1(enabled)184 336 Q F0(Names of enabled shell b)224 336 Q(uiltins.)-.2 E F1(export)184 348 Q F0(Names of e)224 348 Q(xported shell v)-.15 E 2.5(ariables. May) -.25 F(also be speci\214ed as)2.5 E F12.5 E F0(.)A F1(\214le)184 360 Q F0(File names.)224 360 Q(May also be speci\214ed as)5 E F1 2.5 E F0(.)A F1(function)184 372 Q F0(Names of shell functions.)224 384 Q F1(gr)184 396 Q(oup)-.18 E F0(Group names.)224 396 Q (May also be speci\214ed as)5 E F12.5 E F0(.)A F1(helptopic)184 408 Q F0(Help topics as accepted by the)224 420 Q F1(help)2.5 E F0 -.2 (bu)2.5 G(iltin.).2 E F1(hostname)184 432 Q F0(Hostnames, as tak)224 444 Q(en from the \214le speci\214ed by the)-.1 E/F3 9/Times-Bold@0 SF (HOSTFILE)2.5 E F0(shell v)2.25 E(ariable.)-.25 E F1(job)184 456 Q F0 (Job names, if job control is acti)224 456 Q -.15(ve)-.25 G 5(.M).15 G (ay also be speci\214ed as)-5 E F12.5 E F0(.)A F1 -.1(ke)184 468 S (yw).1 E(ord)-.1 E F0(Shell reserv)224 480 Q(ed w)-.15 E 2.5(ords. May) -.1 F(also be speci\214ed as)2.5 E F12.5 E F0(.)A F1(running)184 492 Q F0(Names of running jobs, if job control is acti)224 492 Q -.15 (ve)-.25 G(.).15 E F1(ser)184 504 Q(vice)-.1 E F0(Service names.)224 504 Q(May also be speci\214ed as)5 E F12.5 E F0(.)A F1(setopt)184 516 Q F0 -1.11(Va)224 516 S(lid ar)1.11 E(guments for the)-.18 E F12.5 E F0(option to the)2.5 E F1(set)2.5 E F0 -.2(bu)2.5 G(iltin.).2 E F1 (shopt)184 528 Q F0(Shell option names as accepted by the)224 528 Q F1 (shopt)2.5 E F0 -.2(bu)2.5 G(iltin.).2 E F1(signal)184 540 Q F0 (Signal names.)224 540 Q F1(stopped)184 552 Q F0 (Names of stopped jobs, if job control is acti)224 552 Q -.15(ve)-.25 G (.).15 E F1(user)184 564 Q F0(User names.)224 564 Q (May also be speci\214ed as)5 E F12.5 E F0(.)A F1 -.1(va)184 576 S (riable).1 E F0(Names of all shell v)224 576 Q 2.5(ariables. May)-.25 F (also be speci\214ed as)2.5 E F12.5 E F0(.)A F1144 588 Q F2 (command)2.5 E(command)184 600 Q F0 1.055(is e)3.555 F -.15(xe)-.15 G 1.055(cuted in a subshell en).15 F 1.056 (vironment, and its output is used as the possible)-.4 F(completions.) 184 612 Q F1144 624 Q F2(function)2.5 E F0 .114 (The shell function)184 636 R F2(function)2.614 E F0 .114(is e)2.614 F -.15(xe)-.15 G .114(cuted in the current shell en).15 F 2.614 (vironment. When)-.4 F .113(the func-)2.613 F .816(tion is e)184 648 R -.15(xe)-.15 G .816(cuted, the \214rst ar).15 F .816(gument \()-.18 F F1 ($1)A F0 3.316(\)i)C 3.316(st)-3.316 G .817 (he name of the command whose ar)-3.316 F(guments)-.18 E 1.407 (are being completed, the second ar)184 660 R 1.407(gument \()-.18 F F1 ($2)A F0 3.907(\)i)C 3.907(st)-3.907 G 1.407(he w)-3.907 F 1.407 (ord being completed, and the)-.1 F .103(third ar)184 672 R .103 (gument \()-.18 F F1($3)A F0 2.603(\)i)C 2.603(st)-2.603 G .103(he w) -2.603 F .104(ord preceding the w)-.1 F .104 (ord being completed on the current com-)-.1 F .102(mand line.)184 684 R .102(When it \214nishes, the possible completions are retrie)5.102 F -.15(ve)-.25 G 2.601(df).15 G .101(rom the v)-2.601 F .101(alue of the) -.25 F F3(COMPREPL)184 696 Q(Y)-.828 E F0(array v)2.25 E(ariable.)-.25 E (GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(60)190.395 E 0 Cg EP %%Page: 61 61 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10/Times-Bold@0 SF144 84 Q/F2 10/Times-Italic@0 SF(globpat)2.5 E F0 1.007 (The pathname e)184 96 R 1.007(xpansion pattern)-.15 F F2(globpat)3.507 E F0 1.007(is e)3.507 F 1.008(xpanded to generate the possible comple-) -.15 F(tions.)184 108 Q F1144 120 Q F2(pr)2.5 E(e\214x)-.37 E(pr) 184 132 Q(e\214x)-.37 E F0 .535(is added at the be)3.035 F .534 (ginning of each possible completion after all other options ha)-.15 F -.15(ve)-.2 G(been applied.)184 144 Q F1144 156 Q F2(suf)2.5 E <8c78>-.18 E(suf)184 156 Q<8c78>-.18 E F0 (is appended to each possible completion after all other options ha)2.5 E .3 -.15(ve b)-.2 H(een applied.).15 E F1144 168 Q F2(wor)2.5 E (dlist)-.37 E F0(The)184 180 Q F2(wor)3.639 E(dlist)-.37 E F0 1.14 (is split using the characters in the)3.639 F/F3 9/Times-Bold@0 SF(IFS) 3.64 E F0 1.14(special v)3.39 F 1.14(ariable as delimiters, and)-.25 F .981(each resultant w)184 192 R .981(ord is e)-.1 F 3.481 (xpanded. Shell)-.15 F .981(quoting is honored within)3.481 F F2(wor) 3.481 E(dlist)-.37 E F0 3.48(,i)C 3.48(no)-3.48 G .98(rder to)-3.48 F (pro)184 204 Q .765(vide a mechanism for the w)-.15 F .766 (ords to contain shell metacharacters or characters in the)-.1 F -.25 (va)184 216 S 1.965(lue of).25 F F3(IFS)4.465 E/F4 9/Times-Roman@0 SF(.) A F0 1.964 (The possible completions are the members of the resultant list which) 6.465 F(match the w)184 228 Q(ord being completed.)-.1 E F1144 240 Q F2(\214lterpat)2.5 E(\214lterpat)184 252 Q F0 .455 (is a pattern as used for pathname e)2.955 F 2.956(xpansion. It)-.15 F .456(is applied to the list of possible)2.956 F 1.596 (completions generated by the preceding options and ar)184 264 R 1.596 (guments, and each completion)-.18 F(matching)184 276 Q F2(\214lterpat) 3.204 E F0 .704(is remo)3.204 F -.15(ve)-.15 G 3.204(df).15 G .704 (rom the list.)-3.204 F 3.204(Al)5.704 G(eading)-3.204 E F1(!)3.204 E F0 (in)3.204 E F2(\214lterpat)3.205 E F0(ne)3.205 E -.05(ga)-.15 G .705 (tes the pattern;).05 F(in this case, an)184 288 Q 2.5(yc)-.15 G (ompletion not matching)-2.5 E F2(\214lterpat)2.5 E F0(is remo)2.5 E -.15(ve)-.15 G(d.).15 E .467(The return v)144 304.8 R .467 (alue is true unless an in)-.25 F -.25(va)-.4 G .466 (lid option is supplied, an option other than).25 F F12.966 E F0 (or)2.966 E F12.966 E F0 .466(is sup-)2.966 F 1.361 (plied without a)144 316.8 R F2(name)3.861 E F0(ar)3.861 E 1.361 (gument, an attempt is made to remo)-.18 F 1.662 -.15(ve a c)-.15 H 1.362(ompletion speci\214cation for a).15 F F2(name)144 328.8 Q F0 (for which no speci\214cation e)2.5 E (xists, or an error occurs adding a completion speci\214cation.)-.15 E F1(compopt)108 345.6 Q F0([)2.5 E F1A F2(option)2.5 E F0 2.5(][)C F1(\255DEI)-2.5 E F0 2.5(][)C F1(+o)-2.5 E F2(option)2.5 E F0 2.5(][)C F2(name)-2.5 E F0(])A .447(Modify completion options for each)144 357.6 R F2(name)2.947 E F0 .447(according to the)2.947 F F2(option)2.947 E F0 .447(s, or for the currently-e)B -.15(xe)-.15 G(cuting).15 E .725 (completion if no)144 369.6 R F2(name)3.225 E F0 3.225(sa)C .725 (re supplied.)-3.225 F .725(If no)5.725 F F2(option)3.225 E F0 3.225(sa) C .725(re gi)-3.225 F -.15(ve)-.25 G .726 (n, display the completion options for).15 F(each)144 381.6 Q F2(name) 3.224 E F0 .724(or the current completion.)3.224 F .724(The possible v) 5.724 F .724(alues of)-.25 F F2(option)3.224 E F0 .724(are those v)3.224 F .723(alid for the)-.25 F F1(com-)3.223 E(plete)144 393.6 Q F0 -.2(bu) 2.677 G .177(iltin described abo).2 F -.15(ve)-.15 G 5.178(.T).15 G(he) -5.178 E F12.678 E F0 .178 (option indicates that other supplied options should apply to)2.678 F 1.228(the `)144 405.6 R(`def)-.74 E(ault')-.1 E 3.728('c)-.74 G 1.228(o\ mmand completion; that is, completion attempted on a command for which \ no)-3.728 F 2.038(completion has pre)144 417.6 R 2.038 (viously been de\214ned.)-.25 F(The)7.038 E F14.538 E F0 2.039 (option indicates that other supplied options)4.538 F 1.539 (should apply to `)144 429.6 R(`empty')-.74 E 4.039('c)-.74 G 1.538 (ommand completion; that is, completion attempted on a blank line.) -4.039 F(The)144 441.6 Q F13.02 E F0 .52(option indicates that ot\ her supplied options should apply to completion on the initial non-)3.02 F .868(assignment w)144 453.6 R .868 (ord on the line, or after a command delimiter such as)-.1 F F1(;)3.368 E F0(or)3.368 E F1(|)3.368 E F0 3.367(,w)C .867(hich is usually com-) -3.367 F(mand name completion.)144 465.6 Q .431(The return v)144 489.6 R .431(alue is true unless an in)-.25 F -.25(va)-.4 G .431 (lid option is supplied, an attempt is made to modify the op-).25 F (tions for a)144 501.6 Q F2(name)2.5 E F0 (for which no completion speci\214cation e)2.5 E (xists, or an output error occurs.)-.15 E F1(continue)108 518.4 Q F0([) 2.5 E F2(n)A F0(])A .851(Resume the ne)144 530.4 R .851 (xt iteration of the enclosing)-.15 F F1 -.25(fo)3.351 G(r).25 E F0(,)A F1(while)3.351 E F0(,)A F1(until)3.351 E F0 3.351(,o)C(r)-3.351 E F1 (select)3.35 E F0 3.35(loop. If)3.35 F F2(n)3.71 E F0 .85 (is speci\214ed, re-)3.59 F .203(sume at the)144 542.4 R F2(n)2.703 E F0 .203(th enclosing loop.)B F2(n)5.563 E F0 .203(must be)2.943 F/F5 10 /Symbol SF2.703 E F0 2.704(1. If)2.703 F F2(n)3.064 E F0 .204 (is greater than the number of enclosing loops,)2.944 F 1.184 (the last enclosing loop \(the `)144 554.4 R(`top-le)-.74 E -.15(ve)-.25 G(l').15 E 3.684('l)-.74 G 1.184(oop\) is resumed.)-3.684 F 1.183 (The return v)6.184 F 1.183(alue is 0 unless)-.25 F F2(n)3.683 E F0 1.183(is not)3.683 F(greater than or equal to 1.)144 566.4 Q F1(declar) 108 583.2 Q(e)-.18 E F0([)2.5 E F1(\255aAfFgiIlnrtux)A F0 2.5(][)C F1 -2.5 E F0 2.5(][)C F2(name)-2.5 E F0([=)A F2(value)A F0 2.5(].)C (..])-2.5 E F1(typeset)108 595.2 Q F0([)2.5 E F1(\255aAfFgiIlnrtux)A F0 2.5(][)C F1-2.5 E F0 2.5(][)C F2(name)-2.5 E F0([=)A F2(value)A F0 2.5(].)C(..])-2.5 E 1.264(Declare v)144 607.2 R 1.264 (ariables and/or gi)-.25 F 1.564 -.15(ve t)-.25 H 1.264(hem attrib).15 F 3.765(utes. If)-.2 F(no)3.765 E F2(name)3.765 E F0 3.765(sa)C 1.265 (re gi)-3.765 F -.15(ve)-.25 G 3.765(nt).15 G 1.265(hen display the v) -3.765 F 1.265(alues of)-.25 F -.25(va)144 619.2 S 3.46(riables. The).25 F F13.46 E F0 .96(option will display the attrib)3.46 F .96 (utes and v)-.2 F .96(alues of each)-.25 F F2(name)3.82 E F0 5.96(.W).18 G(hen)-5.96 E F13.46 E F0 .96(is used)3.46 F(with)144 631.2 Q F2 (name)2.774 E F0(ar)2.774 E .274 (guments, additional options, other than)-.18 F F12.775 E F0(and) 2.775 E F12.775 E F0 2.775(,a)C .275(re ignored.)-2.775 F(When) 5.275 E F12.775 E F0 .275(is supplied)2.775 F(without)144 643.2 Q F2(name)3.79 E F0(ar)3.79 E 1.29(guments, it will display the attrib) -.18 F 1.289(utes and v)-.2 F 1.289(alues of all v)-.25 F 1.289 (ariables ha)-.25 F 1.289(ving the at-)-.2 F(trib)144 655.2 Q .38 (utes speci\214ed by the additional options.)-.2 F .38 (If no other options are supplied with)5.38 F F12.88 E F0(,)A F1 (declar)2.88 E(e)-.18 E F0(will)2.88 E 1.107(display the attrib)144 667.2 R 1.107(utes and v)-.2 F 1.106(alues of all shell v)-.25 F 3.606 (ariables. The)-.25 F F13.606 E F0 1.106 (option will restrict the display to)3.606 F .299(shell functions.)144 679.2 R(The)5.299 E F12.799 E F0 .299(option inhibits the display\ of function de\214nitions; only the function name)2.799 F 1.54 (and attrib)144 691.2 R 1.54(utes are printed.)-.2 F 1.54(If the)6.54 F F1(extdeb)4.04 E(ug)-.2 E F0 1.54(shell option is enabled using)4.04 F F1(shopt)4.04 E F0 4.04(,t)C 1.54(he source \214le)-4.04 F .648 (name and line number where each)144 703.2 R F2(name)3.148 E F0 .648 (is de\214ned are displayed as well.)3.148 F(The)5.648 E F13.148 E F0 .649(option implies)3.149 F F1144 715.2 Q F0 5.837(.T)C(he) -5.837 E F13.337 E F0 .837(option forces v)3.337 F .836 (ariables to be created or modi\214ed at the global scope, e)-.25 F -.15 (ve)-.25 G 3.336(nw).15 G(hen)-3.336 E F1(de-)3.336 E(clar)144 727.2 Q (e)-.18 E F0 .818(is e)3.318 F -.15(xe)-.15 G .818 (cuted in a shell function.).15 F .818 (It is ignored in all other cases.)5.818 F(The)5.819 E F13.319 E F0 .819(option causes local)3.319 F(GNU Bash 5.1)72 768 Q (2020 October 29)141.235 E(61)190.395 E 0 Cg EP %%Page: 62 62 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E -.25(va)144 84 S .694(riables to inherit the attrib).25 F .694(utes \(e)-.2 F .694 (xcept the)-.15 F/F1 10/Times-Italic@0 SF(namer)3.194 E(ef)-.37 E F0 (attrib)3.194 E .693(ute\) and v)-.2 F .693(alue of an)-.25 F 3.193(ye) -.15 G .693(xisting v)-3.343 F(ariable)-.25 E .82(with the same)144 96 R F1(name)3.32 E F0 .82(at a surrounding scope.)3.32 F .82 (If there is no e)5.82 F .82(xisting v)-.15 F .82(ariable, the local v) -.25 F .82(ariable is)-.25 F .38(initially unset.)144 108 R .38 (The follo)5.38 F .379(wing options can be used to restrict output to v) -.25 F .379(ariables with the speci\214ed)-.25 F(attrib)144 120 Q (ute or to gi)-.2 E .3 -.15(ve v)-.25 H(ariables attrib)-.1 E(utes:)-.2 E/F2 10/Times-Bold@0 SF144 132 Q F0(Each)180 132 Q F1(name)2.5 E F0(is an inde)2.5 E -.15(xe)-.15 G 2.5(da).15 G(rray v)-2.5 E (ariable \(see)-.25 E F2(Arrays)2.5 E F0(abo)2.5 E -.15(ve)-.15 G(\).) .15 E F2144 144 Q F0(Each)180 144 Q F1(name)2.5 E F0 (is an associati)2.5 E .3 -.15(ve a)-.25 H(rray v).15 E(ariable \(see) -.25 E F2(Arrays)2.5 E F0(abo)2.5 E -.15(ve)-.15 G(\).).15 E F2144 156 Q F0(Use function names only)180 156 Q(.)-.65 E F2144 168 Q F0 .557(The v)180 168 R .558(ariable is treated as an inte)-.25 F .558 (ger; arithmetic e)-.15 F -.25(va)-.25 G .558(luation \(see).25 F/F3 9 /Times-Bold@0 SF .558(ARITHMETIC EV)3.058 F(ALU)-1.215 E(A-)-.54 E(TION) 180 180 Q F0(abo)2.25 E -.15(ve)-.15 G 2.5(\)i).15 G 2.5(sp)-2.5 G (erformed when the v)-2.5 E(ariable is assigned a v)-.25 E(alue.)-.25 E F2144 192 Q F0 .91(When the v)180 192 R .909 (ariable is assigned a v)-.25 F .909(alue, all upper)-.25 F .909 (-case characters are con)-.2 F -.15(ve)-.4 G .909(rted to lo).15 F(wer) -.25 E(-)-.2 E 2.5(case. The)180 204 R(upper)2.5 E(-case attrib)-.2 E (ute is disabled.)-.2 E F2144 216 Q F0(Gi)180 216 Q 1.619 -.15 (ve e)-.25 H(ach).15 E F1(name)3.819 E F0(the)3.819 E F1(namer)3.819 E (ef)-.37 E F0(attrib)3.819 E 1.319 (ute, making it a name reference to another v)-.2 F(ariable.)-.25 E .478 (That other v)180 228 R .478(ariable is de\214ned by the v)-.25 F .478 (alue of)-.25 F F1(name)2.978 E F0 5.478(.A)C .478 (ll references, assignments, and at-)-5.478 F(trib)180 240 Q .781 (ute modi\214cations to)-.2 F F1(name)3.281 E F0 3.281(,e)C .782 (xcept those using or changing the)-3.431 F F23.282 E F0(attrib) 3.282 E .782(ute itself, are)-.2 F .809(performed on the v)180 252 R .809(ariable referenced by)-.25 F F1(name)3.308 E F0 1.908 -.55('s v)D 3.308(alue. The).3 F .808(nameref attrib)3.308 F .808(ute cannot be)-.2 F(applied to array v)180 264 Q(ariables.)-.25 E F2144 276 Q F0 (Mak)180 276 Q(e)-.1 E F1(name)3.654 E F0 3.654(sr)C(eadonly)-3.654 E 6.154(.T)-.65 G 1.154(hese names cannot then be assigned v)-6.154 F 1.155(alues by subsequent as-)-.25 F(signment statements or unset.)180 288 Q F2144 300 Q F0(Gi)180 300 Q .73 -.15(ve e)-.25 H(ach).15 E F1(name)2.93 E F0(the)2.929 E F1(tr)2.929 E(ace)-.15 E F0(attrib)2.929 E 2.929(ute. T)-.2 F .429(raced functions inherit the)-.35 F F2(DEB)2.929 E(UG)-.1 E F0(and)2.929 E F2(RETURN)2.929 E F0 (traps from the calling shell.)180 312 Q(The trace attrib)5 E (ute has no special meaning for v)-.2 E(ariables.)-.25 E F2144 324 Q F0 .909(When the v)180 324 R .909(ariable is assigned a v)-.25 F .909 (alue, all lo)-.25 F(wer)-.25 E .909(-case characters are con)-.2 F -.15 (ve)-.4 G .91(rted to upper).15 F(-)-.2 E 2.5(case. The)180 336 R(lo)2.5 E(wer)-.25 E(-case attrib)-.2 E(ute is disabled.)-.2 E F2144 348 Q F0(Mark)180 348 Q F1(name)2.5 E F0 2.5(sf)C(or e)-2.5 E (xport to subsequent commands via the en)-.15 E(vironment.)-.4 E .144 (Using `+' instead of `\255' turns of)144 364.8 R 2.643(ft)-.25 G .143 (he attrib)-2.643 F .143(ute instead, with the e)-.2 F .143 (xceptions that)-.15 F F2(+a)2.643 E F0(and)2.643 E F2(+A)2.643 E F0 .143(may not)2.643 F .578(be used to destro)144 376.8 R 3.079(ya)-.1 G .579(rray v)-3.079 F .579(ariables and)-.25 F F2(+r)3.079 E F0 .579 (will not remo)3.079 F .879 -.15(ve t)-.15 H .579(he readonly attrib).15 F 3.079(ute. When)-.2 F .579(used in a)3.079 F(function,)144 388.8 Q F2 (declar)3.544 E(e)-.18 E F0(and)3.544 E F2(typeset)3.544 E F0(mak)3.544 E 3.544(ee)-.1 G(ach)-3.544 E F1(name)3.543 E F0 1.043 (local, as with the)3.543 F F2(local)3.543 E F0 1.043 (command, unless the)3.543 F F23.543 E F0 1.205 (option is supplied.)144 400.8 R 1.205(If a v)6.205 F 1.205 (ariable name is follo)-.25 F 1.205(wed by =)-.25 F F1(value)A F0 3.705 (,t)C 1.205(he v)-3.705 F 1.205(alue of the v)-.25 F 1.205 (ariable is set to)-.25 F F1(value)144 412.8 Q F0 5.218(.W)C .218 (hen using)-5.218 F F22.718 E F0(or)2.718 E F22.718 E F0 .217(and the compound assignment syntax to create array v)2.717 F .217 (ariables, addi-)-.25 F .882(tional attrib)144 424.8 R .882 (utes do not tak)-.2 F 3.382(ee)-.1 G -.25(ff)-3.382 G .882 (ect until subsequent assignments.).25 F .882(The return v)5.882 F .882 (alue is 0 unless an)-.25 F(in)144 436.8 Q -.25(va)-.4 G .366(lid optio\ n is encountered, an attempt is made to de\214ne a function using).25 F /F4 10/Courier@0 SF .365(\255f foo=bar)2.865 F F0 2.865(,a)C 2.865(na) -2.865 G(t-)-2.865 E .548(tempt is made to assign a v)144 448.8 R .548 (alue to a readonly v)-.25 F .549 (ariable, an attempt is made to assign a v)-.25 F .549(alue to an)-.25 F 1.749(array v)144 460.8 R 1.749 (ariable without using the compound assignment syntax \(see)-.25 F F2 (Arrays)4.248 E F0(abo)4.248 E -.15(ve)-.15 G 1.748(\), one of the).15 F F1(names)144 472.8 Q F0 .359(is not a v)2.858 F .359(alid shell v)-.25 F .359(ariable name, an attempt is made to turn of)-.25 F 2.859(fr)-.25 G .359(eadonly status for a read-)-2.859 F 1.213(only v)144 484.8 R 1.213 (ariable, an attempt is made to turn of)-.25 F 3.713(fa)-.25 G 1.213 (rray status for an array v)-3.713 F 1.212(ariable, or an attempt is) -.25 F(made to display a non-e)144 496.8 Q(xistent function with)-.15 E F22.5 E F0(.)A F2(dirs [\255clpv] [+)108 513.6 Q F1(n)A F2 2.5(][) C-2.5 E F1(n)A F2(])A F0 -.4(Wi)144 525.6 S .328 (thout options, displays the list of currently remembered directories.) .4 F .329(The def)5.329 F .329(ault display is on a)-.1 F 1.238 (single line with directory names separated by spaces.)144 537.6 R 1.238 (Directories are added to the list with the)6.238 F F2(pushd)144 549.6 Q F0 .927(command; the)3.427 F F2(popd)3.428 E F0 .928(command remo)3.428 F -.15(ve)-.15 G 3.428(se).15 G .928(ntries from the list.)-3.428 F .928 (The current directory is al-)5.928 F -.1(wa)144 561.6 S (ys the \214rst directory in the stack.).1 E F2144 573.6 Q F0 (Clears the directory stack by deleting all of the entries.)180 573.6 Q F2144 585.6 Q F0 .882 (Produces a listing using full pathnames; the def)180 585.6 R .881 (ault listing format uses a tilde to denote)-.1 F(the home directory)180 597.6 Q(.)-.65 E F2144 609.6 Q F0 (Print the directory stack with one entry per line.)180 609.6 Q F2 144 621.6 Q F0 .272(Print the directory stack with one entry per line, \ pre\214xing each entry with its inde)180 621.6 R 2.773(xi)-.15 G 2.773 (nt)-2.773 G(he)-2.773 E(stack.)180 633.6 Q F2(+)144 645.6 Q F1(n)A F0 1.565(Displays the)180 645.6 R F1(n)4.065 E F0 1.565 (th entry counting from the left of the list sho)B 1.564(wn by)-.25 F F2 (dirs)4.064 E F0 1.564(when in)4.064 F -.2(vo)-.4 G -.1(ke).2 G(d).1 E (without options, starting with zero.)180 657.6 Q F2144 669.6 Q F1 (n)A F0 1.194(Displays the)180 669.6 R F1(n)3.694 E F0 1.194 (th entry counting from the right of the list sho)B 1.194(wn by)-.25 F F2(dirs)3.694 E F0 1.194(when in)3.694 F -.2(vo)-.4 G -.1(ke).2 G(d).1 E (without options, starting with zero.)180 681.6 Q .258(The return v)144 698.4 R .258(alue is 0 unless an in)-.25 F -.25(va)-.4 G .258 (lid option is supplied or).25 F F1(n)2.758 E F0(inde)2.758 E -.15(xe) -.15 G 2.758(sb).15 G -.15(ey)-2.758 G .258(ond the end of the direc-) .15 F(tory stack.)144 710.4 Q(GNU Bash 5.1)72 768 Q(2020 October 29) 141.235 E(62)190.395 E 0 Cg EP %%Page: 63 63 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10/Times-Bold@0 SF(diso)108 84 Q(wn)-.1 E F0([)2.5 E F1(\255ar)A F0 2.5(][)C F1 -2.5 E F0 2.5(][)C/F2 10/Times-Italic@0 SF(jobspec)-2.5 E F0(... |)2.5 E F2(pid)2.5 E F0(... ])2.5 E -.4(Wi)144 96 S .121(thout options, remo).4 F .422 -.15(ve e)-.15 H(ach).15 E F2(jobspec)4.362 E F0 .122 (from the table of acti)2.932 F .422 -.15(ve j)-.25 H 2.622(obs. If).15 F F2(jobspec)4.362 E F0 .122(is not present, and)2.932 F .096 (neither the)144 108 R F12.596 E F0 .096(nor the)2.596 F F1 2.596 E F0 .096(option is supplied, the)2.596 F F2(curr)2.596 E .096 (ent job)-.37 F F0 .096(is used.)2.596 F .096(If the)5.096 F F1 2.596 E F0 .096(option is gi)2.596 F -.15(ve)-.25 G .096(n, each).15 F F2(jobspec)145.74 120 Q F0 .585(is not remo)3.395 F -.15(ve)-.15 G 3.085 (df).15 G .585(rom the table, b)-3.085 F .585(ut is mark)-.2 F .585 (ed so that)-.1 F/F3 9/Times-Bold@0 SF(SIGHUP)3.085 E F0 .586 (is not sent to the job if the)2.835 F .962(shell recei)144 132 R -.15 (ve)-.25 G 3.462(sa).15 G F3(SIGHUP)A/F4 9/Times-Roman@0 SF(.)A F0 .962 (If no)5.462 F F2(jobspec)5.202 E F0 .962(is supplied, the)3.772 F F1 3.462 E F0 .962(option means to remo)3.462 F 1.262 -.15(ve o)-.15 H 3.462(rm).15 G .962(ark all)-3.462 F 1.358(jobs; the)144 144 R F1 3.858 E F0 1.358(option without a)3.858 F F2(jobspec)5.598 E F0 (ar)4.169 E 1.359(gument restricts operation to running jobs.)-.18 F 1.359(The return)6.359 F -.25(va)144 156 S(lue is 0 unless a).25 E F2 (jobspec)4.24 E F0(does not specify a v)2.81 E(alid job)-.25 E(.)-.4 E F1(echo)108 172.8 Q F0([)2.5 E F1(\255neE)A F0 2.5(][)C F2(ar)-2.5 E(g) -.37 E F0(...])2.5 E .425(Output the)144 184.8 R F2(ar)2.925 E(g)-.37 E F0 .424(s, separated by spaces, follo)B .424(wed by a ne)-.25 F 2.924 (wline. The)-.25 F .424(return status is 0 unless a write)2.924 F .307 (error occurs.)144 196.8 R(If)5.307 E F12.807 E F0 .307 (is speci\214ed, the trailing ne)2.807 F .308(wline is suppressed.)-.25 F .308(If the)5.308 F F12.808 E F0 .308(option is gi)2.808 F -.15 (ve)-.25 G .308(n, inter).15 F(-)-.2 E .198(pretation of the follo)144 208.8 R .198(wing backslash-escaped characters is enabled.)-.25 F(The) 5.198 E F12.698 E F0 .197(option disables the in-)2.697 F .067 (terpretation of these escape characters, e)144 220.8 R -.15(ve)-.25 G 2.567(no).15 G 2.567(ns)-2.567 G .067(ystems where the)-2.567 F 2.567 (ya)-.15 G .067(re interpreted by def)-2.567 F 2.568(ault. The)-.1 F F1 (xpg_echo)144 232.8 Q F0 .602 (shell option may be used to dynamically determine whether or not)3.102 F F1(echo)3.101 E F0 -.15(ex)3.101 G .601(pands these).15 F .658 (escape characters by def)144 244.8 R(ault.)-.1 E F1(echo)5.658 E F0 .659(does not interpret)3.159 F F13.159 E F0 .659 (to mean the end of options.)3.159 F F1(echo)5.659 E F0(inter)3.159 E(-) -.2 E(prets the follo)144 256.8 Q(wing escape sequences:)-.25 E F1(\\a) 144 268.8 Q F0(alert \(bell\))180 268.8 Q F1(\\b)144 280.8 Q F0 (backspace)180 280.8 Q F1(\\c)144 292.8 Q F0(suppress further output)180 292.8 Q F1(\\e)144 304.8 Q(\\E)144 316.8 Q F0(an escape character)180 316.8 Q F1(\\f)144 328.8 Q F0(form feed)180 328.8 Q F1(\\n)144 340.8 Q F0(ne)180 340.8 Q 2.5(wl)-.25 G(ine)-2.5 E F1(\\r)144 352.8 Q F0 (carriage return)180 352.8 Q F1(\\t)144 364.8 Q F0(horizontal tab)180 364.8 Q F1(\\v)144 376.8 Q F0 -.15(ve)180 376.8 S(rtical tab).15 E F1 (\\\\)144 388.8 Q F0(backslash)180 388.8 Q F1(\\0)144 400.8 Q F2(nnn)A F0(the eight-bit character whose v)180 400.8 Q(alue is the octal v)-.25 E(alue)-.25 E F2(nnn)2.5 E F0(\(zero to three octal digits\))2.5 E F1 (\\x)144 412.8 Q F2(HH)A F0(the eight-bit character whose v)180 412.8 Q (alue is the he)-.25 E(xadecimal v)-.15 E(alue)-.25 E F2(HH)2.5 E F0 (\(one or tw)2.5 E 2.5(oh)-.1 G .3 -.15(ex d)-2.5 H(igits\)).15 E F1 (\\u)144 424.8 Q F2(HHHH)A F0 1.507 (the Unicode \(ISO/IEC 10646\) character whose v)180 436.8 R 1.506 (alue is the he)-.25 F 1.506(xadecimal v)-.15 F(alue)-.25 E F2(HHHH) 4.006 E F0(\(one to four he)180 448.8 Q 2.5(xd)-.15 G(igits\))-2.5 E F1 (\\U)144 460.8 Q F2(HHHHHHHH)A F0 .547 (the Unicode \(ISO/IEC 10646\) character whose v)180 472.8 R .547 (alue is the he)-.25 F .548(xadecimal v)-.15 F(alue)-.25 E F2(HHHHH-) 3.048 E(HHH)180 484.8 Q F0(\(one to eight he)2.5 E 2.5(xd)-.15 G (igits\))-2.5 E F1(enable)108 501.6 Q F0([)2.5 E F1A F0 2.5(][)C F1(\255dnps)-2.5 E F0 2.5(][)C F1-2.5 E F2(\214lename)2.5 E F0 2.5 (][)C F2(name)-2.5 E F0(...])2.5 E .278(Enable and disable b)144 513.6 R .278(uiltin shell commands.)-.2 F .278(Disabling a b)5.278 F .278 (uiltin allo)-.2 F .278(ws a disk command which has)-.25 F .833 (the same name as a shell b)144 525.6 R .834(uiltin to be e)-.2 F -.15 (xe)-.15 G .834(cuted without specifying a full pathname, e).15 F -.15 (ve)-.25 G 3.334(nt).15 G(hough)-3.334 E .99 (the shell normally searches for b)144 537.6 R .989 (uiltins before disk commands.)-.2 F(If)5.989 E F13.489 E F0 .989 (is used, each)3.489 F F2(name)3.489 E F0 .989(is dis-)3.489 F .648 (abled; otherwise,)144 549.6 R F2(names)3.148 E F0 .648(are enabled.) 3.148 F -.15(Fo)5.648 G 3.148(re).15 G .648(xample, to use the)-3.298 F F1(test)3.148 E F0 .648(binary found via the)3.148 F F3 -.666(PA)3.148 G (TH)-.189 E F0(in-)2.899 E .539(stead of the shell b)144 561.6 R .538 (uiltin v)-.2 F .538(ersion, run)-.15 F/F5 10/Courier@0 SF .538 (enable -n test)3.038 F F0 5.538(.T)C(he)-5.538 E F13.038 E F0 .538(option means to load the ne)3.038 F(w)-.25 E -.2(bu)144 573.6 S 1.365(iltin command).2 F F2(name)4.225 E F0 1.365(from shared object) 4.045 F F2(\214lename)5.775 E F0 3.865(,o).18 G 3.865(ns)-3.865 G 1.365 (ystems that support dynamic loading.)-3.865 F(The)144 585.6 Q F1 2.867 E F0 .367(option will delete a b)2.867 F .367(uiltin pre)-.2 F .367(viously loaded with)-.25 F F12.866 E F0 5.366(.I)C 2.866(fn) -5.366 G(o)-2.866 E F2(name)2.866 E F0(ar)2.866 E .366(guments are gi) -.18 F -.15(ve)-.25 G .366(n, or).15 F .398(if the)144 597.6 R F1 2.898 E F0 .399(option is supplied, a list of shell b)2.899 F .399 (uiltins is printed.)-.2 F -.4(Wi)5.399 G .399(th no other option ar).4 F .399(guments, the)-.18 F .099(list consists of all enabled shell b)144 609.6 R 2.598(uiltins. If)-.2 F F12.598 E F0 .098 (is supplied, only disabled b)2.598 F .098(uiltins are printed.)-.2 F (If)5.098 E F12.598 E F0 .905 (is supplied, the list printed includes all b)144 621.6 R .905 (uiltins, with an indication of whether or not each is en-)-.2 F 2.873 (abled. If)144 633.6 R F12.873 E F0 .372 (is supplied, the output is restricted to the POSIX)2.873 F F2(special) 2.872 E F0 -.2(bu)2.872 G 2.872(iltins. The).2 F .372(return v)2.872 F .372(alue is)-.25 F 2.5(0u)144 645.6 S(nless a)-2.5 E F2(name)2.86 E F0 (is not a shell b)2.68 E(uiltin or there is an error loading a ne)-.2 E 2.5(wb)-.25 G(uiltin from a shared object.)-2.7 E F1 -2.3 -.15(ev a)108 662.4 T(l).15 E F0([)2.5 E F2(ar)A(g)-.37 E F0(...])2.5 E(The)144 674.4 Q F2(ar)3.17 E(g)-.37 E F0 3.17(sa)C .671 (re read and concatenated together into a single command.)-3.17 F .671 (This command is then read)5.671 F .479(and e)144 686.4 R -.15(xe)-.15 G .479(cuted by the shell, and its e).15 F .479 (xit status is returned as the v)-.15 F .478(alue of)-.25 F F1 -2.3 -.15 (ev a)2.978 H(l).15 E F0 5.478(.I)C 2.978(ft)-5.478 G .478(here are no) -2.978 F F2(ar)3.308 E(gs)-.37 E F0(,).27 E(or only null ar)144 698.4 Q (guments,)-.18 E F1 -2.3 -.15(ev a)2.5 H(l).15 E F0(returns 0.)2.5 E (GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(63)190.395 E 0 Cg EP %%Page: 64 64 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10/Times-Bold@0 SF(exec)108 84 Q F0([)2.5 E F1(\255cl)A F0 2.5(][)C F1-2.5 E/F2 10 /Times-Italic@0 SF(name)2.5 E F0 2.5(][)C F2(command)-2.5 E F0([)2.5 E F2(ar)A(guments)-.37 E F0(]])A(If)144 96 Q F2(command)3.005 E F0 .305 (is speci\214ed, it replaces the shell.)3.575 F .305(No ne)5.305 F 2.805 (wp)-.25 G .306(rocess is created.)-2.805 F(The)5.306 E F2(ar)3.136 E (guments)-.37 E F0(become)3.076 E .177(the ar)144 108 R .177(guments to) -.18 F F2(command)2.676 E F0 5.176(.I)C 2.676(ft)-5.176 G(he)-2.676 E F1 2.676 E F0 .176 (option is supplied, the shell places a dash at the be)2.676 F .176 (ginning of)-.15 F .48(the zeroth ar)144 120 R .48(gument passed to)-.18 F F2(command)3.18 E F0 5.48(.T).77 G .48(his is what)-5.48 F F2(lo)3.07 E(gin)-.1 E F0 .48(\(1\) does.).24 F(The)5.48 E F12.98 E F0 .48 (option causes)2.98 F F2(com-)3.18 E(mand)144 132 Q F0 .639(to be e) 3.909 F -.15(xe)-.15 G .638(cuted with an empty en).15 F 3.138 (vironment. If)-.4 F F13.138 E F0 .638 (is supplied, the shell passes)3.138 F F2(name)3.498 E F0 .638(as the) 3.318 F 1.077(zeroth ar)144 144 R 1.077(gument to the e)-.18 F -.15(xe) -.15 G 1.077(cuted command.).15 F(If)6.077 E F2(command)3.777 E F0 1.077 (cannot be e)4.347 F -.15(xe)-.15 G 1.077(cuted for some reason, a).15 F (non-interacti)144 156 Q .877 -.15(ve s)-.25 H .577(hell e).15 F .577 (xits, unless the)-.15 F F1(execfail)3.077 E F0 .577 (shell option is enabled.)3.077 F .576(In that case, it returns f)5.577 F(ail-)-.1 E 3.32(ure. An)144 168 R(interacti)3.32 E 1.12 -.15(ve s)-.25 H .82(hell returns f).15 F .82(ailure if the \214le cannot be e)-.1 F -.15(xe)-.15 G 3.32(cuted. A).15 F .82(subshell e)3.32 F .82 (xits uncondi-)-.15 F .288(tionally if)144 180 R F1(exec)2.788 E F0 -.1 (fa)2.788 G 2.788(ils. If).1 F F2(command)2.988 E F0 .288 (is not speci\214ed, an)3.558 F 2.787(yr)-.15 G .287(edirections tak) -2.787 F 2.787(ee)-.1 G -.25(ff)-2.787 G .287(ect in the current shell,) .25 F(and the return status is 0.)144 192 Q (If there is a redirection error)5 E 2.5(,t)-.4 G (he return status is 1.)-2.5 E F1(exit)108 208.8 Q F0([)2.5 E F2(n)A F0 (])A .095(Cause the shell to e)144 208.8 R .095(xit with a status of) -.15 F F2(n)2.595 E F0 5.095(.I)C(f)-5.095 E F2(n)2.955 E F0 .096 (is omitted, the e)2.835 F .096(xit status is that of the last command) -.15 F -.15(exe)144 220.8 S 2.5(cuted. A).15 F(trap on)2.5 E/F3 9 /Times-Bold@0 SF(EXIT)2.5 E F0(is e)2.25 E -.15(xe)-.15 G (cuted before the shell terminates.).15 E F1(export)108 237.6 Q F0([)2.5 E F1(\255fn)A F0 2.5(][).833 G F2(name)-2.5 E F0([=)A F2(wor)A(d)-.37 E F0(]] ...)A F1(export \255p)108 249.6 Q F0 .257(The supplied)144 261.6 R F2(names)3.117 E F0 .257(are mark)3.027 F .257(ed for automatic e)-.1 F .257(xport to the en)-.15 F .257(vironment of subsequently e)-.4 F -.15 (xe)-.15 G(cuted).15 E 2.626(commands. If)144 273.6 R(the)2.626 E F1 2.626 E F0 .127(option is gi)2.627 F -.15(ve)-.25 G .127(n, the) .15 F F2(names)2.987 E F0 .127(refer to functions.)2.897 F .127(If no) 5.127 F F2(names)2.987 E F0 .127(are gi)2.897 F -.15(ve)-.25 G .127 (n, or if the).15 F F1144 285.6 Q F0 .048 (option is supplied, a list of names of all e)2.548 F .048(xported v) -.15 F .048(ariables is printed.)-.25 F(The)5.048 E F12.547 E F0 .047(option causes the)2.547 F -.15(ex)144 297.6 S 1.446 (port property to be remo).15 F -.15(ve)-.15 G 3.947(df).15 G 1.447 (rom each)-3.947 F F2(name)3.947 E F0 6.447(.I)C 3.947(fav)-6.447 G 1.447(ariable name is follo)-4.197 F 1.447(wed by =)-.25 F F2(wor)A(d) -.37 E F0 3.947(,t)C(he)-3.947 E -.25(va)144 309.6 S .742(lue of the v) .25 F .742(ariable is set to)-.25 F F2(wor)3.242 E(d)-.37 E F0(.)A F1 (export)5.742 E F0 .742(returns an e)3.242 F .741 (xit status of 0 unless an in)-.15 F -.25(va)-.4 G .741(lid option is) .25 F .031(encountered, one of the)144 321.6 R F2(names)2.531 E F0 .031 (is not a v)2.531 F .032(alid shell v)-.25 F .032(ariable name, or)-.25 F F12.532 E F0 .032(is supplied with a)2.532 F F2(name)2.892 E F0 (that)2.712 E(is not a function.)144 333.6 Q F1(fc)108 350.4 Q F0([)2.5 E F1A F2(ename)2.5 E F0 2.5(][)C F1(\255lnr)-2.5 E F0 2.5(][)C F2 <8c72>-2.5 E(st)-.1 E F0 2.5(][)C F2(last)-2.5 E F0(])A F1(fc \255s)108 362.4 Q F0([)2.5 E F2(pat)A F0(=)A F2 -.37(re)C(p).37 E F0 2.5(][)C F2 (cmd)-2.5 E F0(])A .432 (The \214rst form selects a range of commands from)144 374.4 R F2<8c72> 4.842 E(st)-.1 E F0(to)3.612 E F2(last)3.022 E F0 .431 (from the history list and displays or)3.612 F .141(edits and re-e)144 386.4 R -.15(xe)-.15 G .141(cutes them.).15 F F2 -.45(Fi)5.141 G -.1(rs) .45 G(t).1 E F0(and)3.321 E F2(last)2.731 E F0 .141 (may be speci\214ed as a string \(to locate the last command)3.321 F(be) 144 398.4 Q .311(ginning with that string\) or as a number \(an inde) -.15 F 2.811(xi)-.15 G .31(nto the history list, where a ne)-2.811 F -.05(ga)-.15 G(ti).05 E .61 -.15(ve n)-.25 H(umber).15 E .071 (is used as an of)144 410.4 R .071 (fset from the current command number\).)-.25 F .071(When listing, a) 5.071 F F2<8c72>2.571 E(st)-.1 E F0(or)2.571 E F2(last)2.571 E F0 .071 (of 0 is equi)2.571 F -.25(va)-.25 G(-).25 E .653 (lent to \2551 and \2550 is equi)144 422.4 R -.25(va)-.25 G .653 (lent to the current command \(usually the).25 F F1(fc)3.153 E F0 .653 (command\); otherwise 0 is)3.153 F(equi)144 434.4 Q -.25(va)-.25 G .242 (lent to \2551 and \2550 is in).25 F -.25(va)-.4 G 2.742(lid. If).25 F F2(last)2.832 E F0 .242 (is not speci\214ed, it is set to the current command for list-)3.422 F .093(ing \(so that)144 446.4 R/F4 10/Courier@0 SF .093(fc \255l \25510) 2.593 F F0 .093(prints the last 10 commands\) and to)2.593 F F2<8c72> 4.502 E(st)-.1 E F0 2.592(otherwise. If)3.272 F F2<8c72>4.502 E(st)-.1 E F0 .092(is not speci-)3.272 F(\214ed, it is set to the pre)144 458.4 Q (vious command for editing and \25516 for listing.)-.25 E(The)144 482.4 Q F12.522 E F0 .022 (option suppresses the command numbers when listing.)2.522 F(The)5.022 E F12.522 E F0 .022(option re)2.522 F -.15(ve)-.25 G .022 (rses the order of).15 F .438(the commands.)144 494.4 R .438(If the) 5.438 F F12.938 E F0 .438(option is gi)2.938 F -.15(ve)-.25 G .438 (n, the commands are listed on standard output.).15 F(Otherwise,)5.438 E .334(the editor gi)144 506.4 R -.15(ve)-.25 G 2.834(nb).15 G(y)-2.834 E F2(ename)3.024 E F0 .335(is in)3.014 F -.2(vo)-.4 G -.1(ke).2 G 2.835 (do).1 G 2.835(na\214)-2.835 G .335(le containing those commands.)-2.835 F(If)5.335 E F2(ename)3.025 E F0 .335(is not gi)3.015 F -.15(ve)-.25 G (n,).15 E .631(the v)144 518.4 R .631(alue of the)-.25 F F3(FCEDIT)3.131 E F0 -.25(va)2.881 G .631(riable is used, and the v).25 F .631(alue of) -.25 F F3(EDIT)3.131 E(OR)-.162 E F0(if)2.881 E F3(FCEDIT)3.13 E F0 .63 (is not set.)2.88 F .63(If nei-)5.63 F .005(ther v)144 530.4 R .005 (ariable is set,)-.25 F F2(vi)4.171 E F0 .005(is used.)4.171 F .005 (When editing is complete, the edited commands are echoed and e)5.005 F (x-)-.15 E(ecuted.)144 542.4 Q .789(In the second form,)144 566.4 R F2 (command)3.288 E F0 .788(is re-e)3.288 F -.15(xe)-.15 G .788 (cuted after each instance of).15 F F2(pat)3.288 E F0 .788 (is replaced by)3.288 F F2 -.37(re)3.288 G(p).37 E F0(.)A F2(Com-)5.788 E(mand)144 578.4 Q F0 .171(is interpreted the same as)2.671 F F2<8c72> 2.671 E(st)-.1 E F0(abo)2.671 E -.15(ve)-.15 G 5.171(.A).15 G .172 (useful alias to use with this is)-2.499 F F4 .172(r='fc \255s')2.672 F F0 2.672(,s)C 2.672(ot)-2.672 G(hat)-2.672 E(typing)144 590.4 Q F4 7.166 (rc)3.666 G(c)-7.166 E F0 1.166(runs the last command be)3.666 F 1.166 (ginning with)-.15 F F4(cc)3.666 E F0 1.165(and typing)3.666 F F4(r) 3.665 E F0(re-e)3.665 E -.15(xe)-.15 G 1.165(cutes the last com-).15 F (mand.)144 602.4 Q .142(If the \214rst form is used, the return v)144 626.4 R .142(alue is 0 unless an in)-.25 F -.25(va)-.4 G .142 (lid option is encountered or).25 F F2<8c72>4.552 E(st)-.1 E F0(or)3.322 E F2(last)2.732 E F0 .455(specify history lines out of range.)144 638.4 R .454(If the)5.454 F F12.954 E F0 .454 (option is supplied, the return v)2.954 F .454(alue is the v)-.25 F .454 (alue of the)-.25 F .787(last command e)144 650.4 R -.15(xe)-.15 G .787 (cuted or f).15 F .788 (ailure if an error occurs with the temporary \214le of commands.)-.1 F .788(If the)5.788 F 1.136 (second form is used, the return status is that of the command re-e)144 662.4 R -.15(xe)-.15 G 1.135(cuted, unless).15 F F2(cmd)3.835 E F0 1.135 (does not)4.405 F(specify a v)144 674.4 Q (alid history line, in which case)-.25 E F1(fc)2.5 E F0(returns f)2.5 E (ailure.)-.1 E F1(fg)108 691.2 Q F0([)2.5 E F2(jobspec)A F0(])A(Resume) 144 703.2 Q F2(jobspec)5.653 E F0 1.413(in the fore)4.223 F 1.413 (ground, and mak)-.15 F 3.913(ei)-.1 G 3.913(tt)-3.913 G 1.413 (he current job)-3.913 F 6.413(.I)-.4 G(f)-6.413 E F2(jobspec)5.653 E F0 1.414(is not present, the)4.223 F(shell')144 715.2 Q 3.117(sn)-.55 G .617(otion of the)-3.117 F F2(curr)3.117 E .617(ent job)-.37 F F0 .617 (is used.)3.117 F .617(The return v)5.617 F .616 (alue is that of the command placed into the)-.25 F(fore)144 727.2 Q .362(ground, or f)-.15 F .362 (ailure if run when job control is disabled or)-.1 F 2.862(,w)-.4 G .363 (hen run with job control enabled, if)-2.862 F(GNU Bash 5.1)72 768 Q (2020 October 29)141.235 E(64)190.395 E 0 Cg EP %%Page: 65 65 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10 /Times-Italic@0 SF(jobspec)145.74 84 Q F0(does not specify a v)2.81 E (alid job or)-.25 E F1(jobspec)4.24 E F0(speci\214es a job that w)2.81 E (as started without job control.)-.1 E/F2 10/Times-Bold@0 SF(getopts)108 100.8 Q F1(optstring name)2.5 E F0([)2.5 E F1(ar)A 2.5(g.)-.37 G(..)-2.5 E F0(])A F2(getopts)144 112.8 Q F0 .793 (is used by shell procedures to parse positional parameters.)3.294 F F1 (optstring)6.023 E F0 .793(contains the option)3.513 F .149 (characters to be recognized; if a character is follo)144 124.8 R .15 (wed by a colon, the option is e)-.25 F .15(xpected to ha)-.15 F .45 -.15(ve a)-.2 H(n).15 E(ar)144 136.8 Q .579 (gument, which should be separated from it by white space.)-.18 F .578 (The colon and question mark char)5.579 F(-)-.2 E .636 (acters may not be used as option characters.)144 148.8 R .636 (Each time it is in)5.636 F -.2(vo)-.4 G -.1(ke).2 G(d,).1 E F2(getopts) 3.136 E F0 .636(places the ne)3.136 F .636(xt op-)-.15 F .03 (tion in the shell v)144 160.8 R(ariable)-.25 E F1(name)2.89 E F0 2.53 (,i).18 G(nitializing)-2.53 E F1(name)2.89 E F0 .029(if it does not e) 2.71 F .029(xist, and the inde)-.15 F 2.529(xo)-.15 G 2.529(ft)-2.529 G .029(he ne)-2.529 F .029(xt ar)-.15 F(gu-)-.18 E .065 (ment to be processed into the v)144 172.8 R(ariable)-.25 E/F3 9 /Times-Bold@0 SF(OPTIND)2.565 E/F4 9/Times-Roman@0 SF(.)A F3(OPTIND) 4.565 E F0 .066(is initialized to 1 each time the shell or a)2.315 F .885(shell script is in)144 184.8 R -.2(vo)-.4 G -.1(ke).2 G 3.385 (d. When).1 F .885(an option requires an ar)3.385 F(gument,)-.18 E F2 (getopts)3.385 E F0 .885(places that ar)3.385 F .885(gument into)-.18 F .566(the v)144 196.8 R(ariable)-.25 E F3(OPT)3.066 E(ARG)-.81 E F4(.)A F0 .566(The shell does not reset)5.066 F F3(OPTIND)3.066 E F0 .567 (automatically; it must be manually reset)2.816 F .39 (between multiple calls to)144 208.8 R F2(getopts)2.89 E F0 .39 (within the same shell in)2.89 F -.2(vo)-.4 G .389(cation if a ne).2 F 2.889(ws)-.25 G .389(et of parameters is to)-2.889 F(be used.)144 220.8 Q 2.043(When the end of options is encountered,)144 244.8 R F2(getopts) 4.543 E F0 -.15(ex)4.543 G 2.043(its with a return v).15 F 2.044 (alue greater than zero.)-.25 F F3(OPTIND)144 256.8 Q F0 (is set to the inde)2.25 E 2.5(xo)-.15 G 2.5(ft)-2.5 G (he \214rst non-option ar)-2.5 E(gument, and)-.18 E F1(name)2.5 E F0 (is set to ?.)2.5 E F2(getopts)144 280.8 Q F0 .485 (normally parses the positional parameters, b)2.985 F .485 (ut if more ar)-.2 F .485(guments are supplied as)-.18 F F1(ar)3.315 E (g)-.37 E F0 -.25(va)3.205 G(l-).25 E(ues,)144 292.8 Q F2(getopts)2.5 E F0(parses those instead.)2.5 E F2(getopts)144 316.8 Q F0 .345 (can report errors in tw)2.845 F 2.845(ow)-.1 G 2.845(ays. If)-2.945 F .345(the \214rst character of)2.845 F F1(optstring)3.075 E F0 .345 (is a colon,)3.065 F F1(silent)3.185 E F0 .345(error re-)3.525 F 1.669 (porting is used.)144 328.8 R 1.668 (In normal operation, diagnostic messages are printed when in)6.669 F -.25(va)-.4 G 1.668(lid options or).25 F .393(missing option ar)144 340.8 R .393(guments are encountered.)-.18 F .394(If the v)5.394 F (ariable)-.25 E F3(OPTERR)2.894 E F0 .394 (is set to 0, no error messages)2.644 F(will be displayed, e)144 352.8 Q -.15(ve)-.25 G 2.5(ni).15 G 2.5(ft)-2.5 G(he \214rst character of)-2.5 E F1(optstring)2.73 E F0(is not a colon.)2.72 E .667(If an in)144 376.8 R -.25(va)-.4 G .667(lid option is seen,).25 F F2(getopts)3.167 E F0 .667 (places ? into)3.167 F F1(name)3.527 E F0 .666 (and, if not silent, prints an error message)3.347 F .399(and unsets)144 388.8 R F3(OPT)2.899 E(ARG)-.81 E F4(.)A F0(If)4.899 E F2(getopts)2.899 E F0 .399(is silent, the option character found is placed in)2.899 F F3 (OPT)2.899 E(ARG)-.81 E F0 .4(and no)2.65 F (diagnostic message is printed.)144 400.8 Q 1.242(If a required ar)144 424.8 R 1.242(gument is not found, and)-.18 F F2(getopts)3.741 E F0 1.241(is not silent, a question mark \()3.741 F F2(?).833 E F0 3.741 (\)i).833 G 3.741(sp)-3.741 G 1.241(laced in)-3.741 F F1(name)144.36 436.8 Q F0(,).18 E F3(OPT)2.713 E(ARG)-.81 E F0 .213 (is unset, and a diagnostic message is printed.)2.463 F(If)5.213 E F2 (getopts)2.713 E F0 .213(is silent, then a colon \()2.713 F F2(:).833 E F0(\)).833 E(is placed in)144 448.8 Q F1(name)2.86 E F0(and)2.68 E F3 (OPT)2.5 E(ARG)-.81 E F0(is set to the option character found.)2.25 E F2 (getopts)144 472.8 Q F0 .902 (returns true if an option, speci\214ed or unspeci\214ed, is found.) 3.402 F .902(It returns f)5.902 F .901(alse if the end of)-.1 F (options is encountered or an error occurs.)144 484.8 Q F2(hash)108 501.6 Q F0([)2.5 E F2(\255lr)A F0 2.5(][)C F2-2.5 E F1(\214lename) 2.5 E F0 2.5(][)C F2(\255dt)-2.5 E F0 2.5(][)C F1(name)-2.5 E F0(])A .858(Each time)144 513.6 R F2(hash)3.358 E F0 .858(is in)3.358 F -.2(vo) -.4 G -.1(ke).2 G .858(d, the full pathname of the command).1 F F1(name) 3.718 E F0 .858(is determined by searching)3.538 F .956 (the directories in)144 525.6 R F2($P)3.456 E -.95(AT)-.74 G(H).95 E F0 .956(and remembered.)3.456 F(An)5.956 E 3.456(yp)-.15 G(re)-3.456 E .956 (viously-remembered pathname is discarded.)-.25 F .242(If the)144 537.6 R F22.742 E F0 .243 (option is supplied, no path search is performed, and)2.742 F F1 (\214lename)4.653 E F0 .243(is used as the full \214lename)2.923 F .615 (of the command.)144 549.6 R(The)5.615 E F23.115 E F0 .615 (option causes the shell to for)3.115 F .615 (get all remembered locations.)-.18 F(The)5.615 E F23.115 E F0 (op-)3.115 E .293(tion causes the shell to for)144 561.6 R .293 (get the remembered location of each)-.18 F F1(name)2.794 E F0 5.294(.I) C 2.794(ft)-5.294 G(he)-2.794 E F22.794 E F0 .294 (option is supplied,)2.794 F .028(the full pathname to which each)144 573.6 R F1(name)2.528 E F0 .028(corresponds is printed.)2.528 F .028 (If multiple)5.028 F F1(name)2.528 E F0(ar)2.528 E .028 (guments are sup-)-.18 F .175(plied with)144 585.6 R F22.675 E F0 2.675(,t)C(he)-2.675 E F1(name)2.675 E F0 .175 (is printed before the hashed full pathname.)2.675 F(The)5.175 E F2 2.676 E F0 .176(option causes output to)2.676 F .783 (be displayed in a format that may be reused as input.)144 597.6 R .783 (If no ar)5.783 F .783(guments are gi)-.18 F -.15(ve)-.25 G .783 (n, or if only).15 F F23.283 E F0(is)3.283 E .807 (supplied, information about remembered commands is printed.)144 609.6 R .807(The return status is true unless a)5.807 F F1(name)144.36 621.6 Q F0(is not found or an in)2.68 E -.25(va)-.4 G(lid option is supplied.) .25 E F2(help)108 638.4 Q F0([)2.5 E F2(\255dms)A F0 2.5(][)C F1 (pattern)-2.5 E F0(])A .867(Display helpful information about b)144 650.4 R .867(uiltin commands.)-.2 F(If)5.867 E F1(pattern)4.617 E F0 .866(is speci\214ed,)3.607 F F2(help)3.366 E F0(gi)3.366 E -.15(ve)-.25 G 3.366(sd).15 G(etailed)-3.366 E .223(help on all commands matching)144 662.4 R F1(pattern)3.973 E F0 2.723(;o).24 G .223 (therwise help for all the b)-2.723 F .224 (uiltins and shell control struc-)-.2 F(tures is printed.)144 674.4 Q F2 144 686.4 Q F0(Display a short description of each)180 686.4 Q F1 (pattern)2.5 E F2144 698.4 Q F0(Display the description of each) 180 698.4 Q F1(pattern)2.5 E F0(in a manpage-lik)2.5 E 2.5(ef)-.1 G (ormat)-2.5 E F2144 710.4 Q F0 (Display only a short usage synopsis for each)180 710.4 Q F1(pattern)2.5 E F0(The return status is 0 unless no command matches)144 727.2 Q F1 (pattern)3.75 E F0(.).24 E(GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(65)190.395 E 0 Cg EP %%Page: 66 66 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10/Times-Bold@0 SF(history [)108 84 Q/F2 10/Times-Italic@0 SF(n)A F1(])A(history \255c) 108 96 Q(history \255d)108 108 Q F2(of)2.5 E(fset)-.18 E F1 (history \255d)108 120 Q F2(start)2.5 E F0A F2(end)A F1 (history \255anrw)108 132 Q F0([)2.5 E F2(\214lename)A F0(])A F1 (history \255p)108 144 Q F2(ar)2.5 E(g)-.37 E F0([)2.5 E F2(ar)A 2.5(g.) -.37 G(..)-2.5 E F0(])A F1(history \255s)108 156 Q F2(ar)2.5 E(g)-.37 E F0([)2.5 E F2(ar)A 2.5(g.)-.37 G(..)-2.5 E F0(])A -.4(Wi)144 168 S .752 (th no options, display the command history list with line numbers.).4 F .752(Lines listed with a)5.752 F F1(*)3.251 E F0(ha)3.251 E -.15(ve)-.2 G .38(been modi\214ed.)144 180 R .38(An ar)5.38 F .38(gument of)-.18 F F2(n)3.24 E F0 .38(lists only the last)3.12 F F2(n)3.24 E F0 2.88 (lines. If)3.12 F .38(the shell v)2.88 F(ariable)-.25 E/F3 9 /Times-Bold@0 SF(HISTTIMEFOR-)2.881 E(MA)144 192 Q(T)-.855 E F0 .265 (is set and not null, it is used as a format string for)2.515 F F2 (strftime)2.764 E F0 .264(\(3\) to display the time stamp asso-)B 1.019 (ciated with each displayed history entry)144 204 R 6.019(.N)-.65 G 3.519(oi)-6.019 G(nterv)-3.519 E 1.019 (ening blank is printed between the formatted)-.15 F .176 (time stamp and the history line.)144 216 R(If)5.176 E F2(\214lename) 2.676 E F0 .176 (is supplied, it is used as the name of the history \214le; if)2.676 F (not, the v)144 228 Q(alue of)-.25 E F3(HISTFILE)2.5 E F0(is used.)2.25 E(Options, if supplied, ha)5 E .3 -.15(ve t)-.2 H(he follo).15 E (wing meanings:)-.25 E F1144 240 Q F0 (Clear the history list by deleting all the entries.)180 240 Q F1 144 252 Q F2(of)2.5 E(fset)-.18 E F0 .389 (Delete the history entry at position)180 264 R F2(of)2.889 E(fset)-.18 E F0 5.389(.I)C(f)-5.389 E F2(of)2.889 E(fset)-.18 E F0 .389(is ne)2.889 F -.05(ga)-.15 G(ti).05 E -.15(ve)-.25 G 2.89(,i).15 G 2.89(ti)-2.89 G 2.89(si)-2.89 G .39(nterpreted as relati)-2.89 F -.15(ve)-.25 G .599 (to one greater than the last history position, so ne)180 276 R -.05(ga) -.15 G(ti).05 E .899 -.15(ve i)-.25 H .598 (ndices count back from the end).15 F(of the history)180 288 Q 2.5(,a) -.65 G(nd an inde)-2.5 E 2.5(xo)-.15 G 2.5<66ad>-2.5 G 2.5(1r)-2.5 G (efers to the current)-2.5 E F1(history -d)2.5 E F0(command.)2.5 E F1 144 300 Q F2(start)2.5 E F0A F2(end)A F0 .757 (Delete the history entries between positions)180 312 R F2(start)3.257 E F0(and)3.258 E F2(end)3.258 E F0 3.258(,i)C(nclusi)-3.258 E -.15(ve)-.25 G 5.758(.P).15 G(ositi)-5.758 E 1.058 -.15(ve a)-.25 H .758(nd ne).15 F -.05(ga)-.15 G(-).05 E(ti)180 324 Q .3 -.15(ve v)-.25 H(alues for)-.1 E F2(start)2.5 E F0(and)2.5 E F2(end)2.5 E F0 (are interpreted as described abo)2.5 E -.15(ve)-.15 G(.).15 E F1 144 336 Q F0 .565(Append the `)180 336 R(`ne)-.74 E(w')-.25 E 3.065('h) -.74 G .564(istory lines to the history \214le.)-3.065 F .564 (These are history lines entered since)5.564 F(the be)180 348 Q (ginning of the current)-.15 E F1(bash)2.5 E F0(session, b)2.5 E (ut not already appended to the history \214le.)-.2 E F1144 360 Q F0 .854(Read the history lines not already read from the history \214le\ into the current history list.)180 360 R .773 (These are lines appended to the history \214le since the be)180 372 R .772(ginning of the current)-.15 F F1(bash)3.272 E F0(ses-)3.272 E (sion.)180 384 Q F1144 396 Q F0(Read the contents of the history \ \214le and append them to the current history list.)180 396 Q F1 144 408 Q F0(Write the current history list to the history \214le, o)180 408 Q -.15(ve)-.15 G(rwriting the history \214le').15 E 2.5(sc)-.55 G (ontents.)-2.5 E F1144 420 Q F0 .625 (Perform history substitution on the follo)180 420 R(wing)-.25 E F2(ar) 3.125 E(gs)-.37 E F0 .626(and display the result on the standard)3.125 F 2.975(output. Does)180 432 R .475 (not store the results in the history list.)2.975 F(Each)5.475 E F2(ar) 2.975 E(g)-.37 E F0 .475(must be quoted to disable)2.975 F (normal history e)180 444 Q(xpansion.)-.15 E F1144 456 Q F0 .362 (Store the)180 456 R F2(ar)3.192 E(gs)-.37 E F0 .363 (in the history list as a single entry)3.132 F 5.363(.T)-.65 G .363 (he last command in the history list is)-5.363 F(remo)180 468 Q -.15(ve) -.15 G 2.5(db).15 G(efore the)-2.5 E F2(ar)2.83 E(gs)-.37 E F0 (are added.)2.77 E .146(If the)144 484.8 R F3(HISTTIMEFORMA)2.645 E(T) -.855 E F0 -.25(va)2.395 G .145 (riable is set, the time stamp information associated with each history) .25 F .668(entry is written to the history \214le, mark)144 496.8 R .669 (ed with the history comment character)-.1 F 5.669(.W)-.55 G .669 (hen the history)-5.669 F .956(\214le is read, lines be)144 508.8 R .956 (ginning with the history comment character follo)-.15 F .955 (wed immediately by a digit)-.25 F .832 (are interpreted as timestamps for the follo)144 520.8 R .832 (wing history entry)-.25 F 5.833(.T)-.65 G .833(he return v)-5.833 F .833(alue is 0 unless an in-)-.25 F -.25(va)144 532.8 S .168(lid option\ is encountered, an error occurs while reading or writing the history \ \214le, an in).25 F -.25(va)-.4 G(lid).25 E F2(of)2.668 E(f-)-.18 E(set) 144 544.8 Q F0(is supplied as an ar)2.5 E(gument to)-.18 E F12.5 E F0 2.5(,o)C 2.5(rt)-2.5 G(he history e)-2.5 E (xpansion supplied as an ar)-.15 E(gument to)-.18 E F12.5 E F0 -.1 (fa)2.5 G(ils.).1 E F1(jobs)108 561.6 Q F0([)2.5 E F1(\255lnprs)A F0 2.5 (][)C F2(jobspec)A F0(... ])2.5 E F1(jobs \255x)108 573.6 Q F2(command) 2.5 E F0([)2.5 E F2(ar)2.5 E(gs)-.37 E F0(... ])2.5 E (The \214rst form lists the acti)144 585.6 Q .3 -.15(ve j)-.25 H 2.5 (obs. The).15 F(options ha)2.5 E .3 -.15(ve t)-.2 H(he follo).15 E (wing meanings:)-.25 E F1144 597.6 Q F0 (List process IDs in addition to the normal information.)180 597.6 Q F1 144 609.6 Q F0 .193(Display information only about jobs that ha) 180 609.6 R .494 -.15(ve c)-.2 H .194(hanged status since the user w).15 F .194(as last noti-)-.1 F(\214ed of their status.)180 621.6 Q F1 144 633.6 Q F0(List only the process ID of the job')180 633.6 Q 2.5(sp) -.55 G(rocess group leader)-2.5 E(.)-.55 E F1144 645.6 Q F0 (Display only running jobs.)180 645.6 Q F1144 657.6 Q F0 (Display only stopped jobs.)180 657.6 Q(If)144 674.4 Q F2(jobspec)4.554 E F0 .314(is gi)3.124 F -.15(ve)-.25 G .314 (n, output is restricted to information about that job).15 F 5.313(.T) -.4 G .313(he return status is 0 unless)-5.313 F(an in)144 686.4 Q -.25 (va)-.4 G(lid option is encountered or an in).25 E -.25(va)-.4 G(lid).25 E F2(jobspec)4.24 E F0(is supplied.)2.81 E .394(If the)144 703.2 R F1 2.894 E F0 .394(option is supplied,)2.894 F F1(jobs)2.894 E F0 .394(replaces an)2.894 F(y)-.15 E F2(jobspec)4.634 E F0 .394(found in) 3.204 F F2(command)3.094 E F0(or)3.664 E F2(ar)3.224 E(gs)-.37 E F0 .395 (with the corre-)3.164 F(sponding process group ID, and e)144 715.2 Q -.15(xe)-.15 G(cutes).15 E F2(command)2.7 E F0(passing it)3.27 E F2(ar) 2.83 E(gs)-.37 E F0 2.5(,r).27 G(eturning its e)-2.5 E(xit status.)-.15 E(GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(66)190.395 E 0 Cg EP %%Page: 67 67 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10/Times-Bold@0 SF(kill)108 84 Q F0([)2.5 E F1A/F2 10/Times-Italic@0 SF(sigspec) 2.5 E F0(|)2.5 E F12.5 E F2(signum)2.5 E F0(|)2.5 E F12.5 E F2 (sigspec)A F0 2.5(][)C F2(pid)-2.5 E F0(|)2.5 E F2(jobspec)2.5 E F0 2.5 (].)C(..)-2.5 E F1(kill \255l)108 96 Q F0(|)A F1A F0([)2.5 E F2 (sigspec)A F0(|)2.5 E F2 -.2(ex)2.5 G(it_status).2 E F0(])A .017 (Send the signal named by)144 108 R F2(sigspec)2.857 E F0(or)2.827 E F2 (signum)2.857 E F0 .017(to the processes named by)2.837 F F2(pid)3.767 E F0(or)3.287 E F2(jobspec)4.257 E F0(.).31 E F2(sigspec)5.357 E F0(is) 2.827 E .318(either a case-insensiti)144 120 R .618 -.15(ve s)-.25 H .318(ignal name such as).15 F/F3 9/Times-Bold@0 SF(SIGKILL)2.818 E F0 .319(\(with or without the)2.569 F F3(SIG)2.819 E F0 .319 (pre\214x\) or a signal)2.569 F(number;)144 132 Q F2(signum)3.268 E F0 .427(is a signal number)3.247 F 5.427(.I)-.55 G(f)-5.427 E F2(sigspec) 3.267 E F0 .427(is not present, then)3.237 F F3(SIGTERM)2.927 E F0 .427 (is assumed.)2.677 F .427(An ar)5.427 F(-)-.2 E .313(gument of)144 144 R F12.813 E F0 .314(lists the signal names.)2.814 F .314(If an)5.314 F 2.814(ya)-.15 G -.18(rg)-2.814 G .314(uments are supplied when).18 F F12.814 E F0 .314(is gi)2.814 F -.15(ve)-.25 G .314 (n, the names of).15 F .12(the signals corresponding to the ar)144 156 R .119(guments are listed, and the return status is 0.)-.18 F(The)5.119 E F2 -.2(ex)2.619 G(it_status).2 E F0(ar)2.619 E(-)-.2 E .799(gument to) 144 168 R F13.299 E F0 .799 (is a number specifying either a signal number or the e)3.299 F .8 (xit status of a process termi-)-.15 F .963(nated by a signal.)144 180 R (The)5.962 E F13.462 E F0 .962(option is equi)3.462 F -.25(va)-.25 G .962(lent to).25 F F13.462 E F0(.)A F1(kill)5.962 E F0 .962 (returns true if at least one signal w)3.462 F(as)-.1 E (successfully sent, or f)144 192 Q(alse if an error occurs or an in)-.1 E -.25(va)-.4 G(lid option is encountered.).25 E F1(let)108 208.8 Q F2 (ar)2.5 E(g)-.37 E F0([)2.5 E F2(ar)A(g)-.37 E F0(...])2.5 E(Each)144 220.8 Q F2(ar)3.026 E(g)-.37 E F0 .196(is an arithmetic e)2.916 F .197 (xpression to be e)-.15 F -.25(va)-.25 G .197(luated \(see).25 F F3 .197 (ARITHMETIC EV)2.697 F(ALU)-1.215 E -.855(AT)-.54 G(ION).855 E F0(abo) 2.447 E -.15(ve)-.15 G 2.697(\). If).15 F(the last)144 232.8 Q F2(ar) 2.83 E(g)-.37 E F0 -.25(eva)2.72 G(luates to 0,).25 E F1(let)2.5 E F0 (returns 1; 0 is returned otherwise.)2.5 E F1(local)108 249.6 Q F0([)2.5 E F2(option)A F0 2.5(][)C F2(name)-2.5 E F0([=)A F2(value)A F0 2.5(].)C (.. | \255 ])-2.5 E -.15(Fo)144 261.6 S 2.542(re).15 G .042(ach ar) -2.542 F .042(gument, a local v)-.18 F .042(ariable named)-.25 F F2 (name)2.902 E F0 .042(is created, and assigned)2.722 F F2(value)2.832 E F0 5.042(.T).18 G(he)-5.042 E F2(option)2.542 E F0 .041(can be)2.541 F (an)144 273.6 Q 3.152(yo)-.15 G 3.152(ft)-3.152 G .652 (he options accepted by)-3.152 F F1(declar)3.152 E(e)-.18 E F0 5.652(.W) C(hen)-5.652 E F1(local)3.152 E F0 .653 (is used within a function, it causes the v)3.152 F(ari-)-.25 E(able)144 285.6 Q F2(name)3.282 E F0 .422(to ha)3.102 F .722 -.15(ve a v)-.2 H .422(isible scope restricted to that function and its children.).15 F (If)5.421 E F2(name)2.921 E F0 .421(is \255, the set)2.921 F .509 (of shell options is made local to the function in which)144 297.6 R F1 (local)3.01 E F0 .51(is in)3.01 F -.2(vo)-.4 G -.1(ke).2 G .51 (d: shell options changed us-).1 F 1.171(ing the)144 309.6 R F1(set) 3.671 E F0 -.2(bu)3.671 G 1.171 (iltin inside the function are restored to their original v).2 F 1.17 (alues when the function re-)-.25 F 3.38(turns. The)144 321.6 R .88 (restore is ef)3.38 F .88(fected as if a series of)-.25 F F1(set)3.381 E F0 .881(commands were e)3.381 F -.15(xe)-.15 G .881 (cuted to restore the v).15 F(alues)-.25 E .788 (that were in place before the function.)144 333.6 R -.4(Wi)5.788 G .788 (th no operands,).4 F F1(local)3.288 E F0 .787(writes a list of local v) 3.288 F .787(ariables to)-.25 F .654(the standard output.)144 345.6 R .654(It is an error to use)5.654 F F1(local)3.154 E F0 .654 (when not within a function.)3.154 F .655(The return status is 0)5.654 F (unless)144 357.6 Q F1(local)2.5 E F0(is used outside a function, an in) 2.5 E -.25(va)-.4 G(lid).25 E F2(name)2.86 E F0(is supplied, or)2.68 E F2(name)2.5 E F0(is a readonly v)2.5 E(ariable.)-.25 E F1(logout)108 374.4 Q F0(Exit a login shell.)144 374.4 Q F1(map\214le)108 391.2 Q F0 ([)2.5 E F1A F2(delim)2.5 E F0 2.5(][)C F1-2.5 E F2(count) 2.5 E F0 2.5(][)C F1-2.5 E F2(origin)2.5 E F0 2.5(][)C F1 -2.5 E F2(count)2.5 E F0 2.5(][)C F1-2.5 E F0 2.5(][)C F1 -2.5 E F2(fd)2.5 E F0 2.5(][)C F1-2.5 E F2(callbac)2.5 E(k)-.2 E F0 2.5(][)C F1-2.5 E F2(quantum)2.5 E F0 2.5(][)C F2(arr)-2.5 E (ay)-.15 E F0(])A F1 -.18(re)108 403.2 S(adarray).18 E F0([)2.5 E F1 A F2(delim)2.5 E F0 2.5(][)C F1-2.5 E F2(count)2.5 E F0 2.5 (][)C F1-2.5 E F2(origin)2.5 E F0 2.5(][)C F1-2.5 E F2 (count)2.5 E F0 2.5(][)C F1-2.5 E F0 2.5(][)C F1-2.5 E F2 (fd)2.5 E F0 2.5(][)C F1-2.5 E F2(callbac)2.5 E(k)-.2 E F0 2.5(][) C F1-2.5 E F2(quantum)2.5 E F0 2.5(][)C F2(arr)-2.5 E(ay)-.15 E F0 (])A .159(Read lines from the standard input into the inde)144 415.2 R -.15(xe)-.15 G 2.659(da).15 G .159(rray v)-2.659 F(ariable)-.25 E F2 (arr)2.989 E(ay)-.15 E F0 2.659(,o).32 G 2.658(rf)-2.659 G .158 (rom \214le descriptor)-2.658 F F2(fd)4.628 E F0 1.248(if the)144 427.2 R F13.748 E F0 1.248(option is supplied.)3.748 F 1.249(The v)6.249 F(ariable)-.25 E F3(MAPFILE)3.749 E F0 1.249(is the def)3.499 F(ault)-.1 E F2(arr)3.749 E(ay)-.15 E F0 6.249(.O)C 1.249(ptions, if supplied,) -6.249 F(ha)144 439.2 Q .3 -.15(ve t)-.2 H(he follo).15 E (wing meanings:)-.25 E F1144 451.2 Q F0 .911 (The \214rst character of)180 451.2 R F2(delim)3.411 E F0 .911 (is used to terminate each input line, rather than ne)3.411 F 3.41 (wline. If)-.25 F F2(delim)180 463.2 Q F0(is the empty string,)2.5 E F1 (map\214le)2.5 E F0(will terminate a line when it reads a NUL character) 2.5 E(.)-.55 E F1144 475.2 Q F0(Cop)180 475.2 Q 2.5(ya)-.1 G 2.5 (tm)-2.5 G(ost)-2.5 E F2(count)2.7 E F0 2.5(lines. If)3.18 F F2(count) 2.5 E F0(is 0, all lines are copied.)2.5 E F1144 487.2 Q F0(Be)180 487.2 Q(gin assigning to)-.15 E F2(arr)2.83 E(ay)-.15 E F0(at inde)2.82 E(x)-.15 E F2(origin)2.73 E F0 5(.T).24 G(he def)-5 E(ault inde)-.1 E 2.5(xi)-.15 G 2.5(s0)-2.5 G(.)-2.5 E F1144 499.2 Q F0 (Discard the \214rst)180 499.2 Q F2(count)2.5 E F0(lines read.)2.5 E F1 144 511.2 Q F0(Remo)180 511.2 Q .3 -.15(ve a t)-.15 H(railing).15 E F2(delim)2.5 E F0(\(def)2.5 E(ault ne)-.1 E (wline\) from each line read.)-.25 E F1144 523.2 Q F0 (Read lines from \214le descriptor)180 523.2 Q F2(fd)2.5 E F0 (instead of the standard input.)2.5 E F1144 535.2 Q F0(Ev)180 535.2 Q(aluate)-.25 E F2(callbac)2.7 E(k)-.2 E F0(each time)3.17 E F2 (quantum)2.5 E F0(lines are read.)2.5 E(The)5 E F12.5 E F0 (option speci\214es)2.5 E F2(quantum)2.75 E F0(.).32 E F1144 547.2 Q F0(Specify the number of lines read between each call to)180 547.2 Q F2(callbac)2.7 E(k)-.2 E F0(.).67 E(If)144 564 Q F12.967 E F0 .467 (is speci\214ed without)2.967 F F12.967 E F0 2.967(,t)C .467 (he def)-2.967 F .467(ault quantum is 5000.)-.1 F(When)5.467 E F2 (callbac)2.967 E(k)-.2 E F0 .467(is e)2.967 F -.25(va)-.25 G .467 (luated, it is sup-).25 F .262(plied the inde)144 576 R 2.762(xo)-.15 G 2.762(ft)-2.762 G .262(he ne)-2.762 F .261(xt array element to be assig\ ned and the line to be assigned to that element)-.15 F .274 (as additional ar)144 588 R(guments.)-.18 E F2(callbac)5.274 E(k)-.2 E F0 .274(is e)2.774 F -.25(va)-.25 G .274 (luated after the line is read b).25 F .275 (ut before the array element is)-.2 F(assigned.)144 600 Q (If not supplied with an e)144 616.8 Q(xplicit origin,)-.15 E F1 (map\214le)2.5 E F0(will clear)2.5 E F2(arr)2.5 E(ay)-.15 E F0 (before assigning to it.)2.5 E F1(map\214le)144 633.6 Q F0 .797 (returns successfully unless an in)3.298 F -.25(va)-.4 G .797 (lid option or option ar).25 F .797(gument is supplied,)-.18 F F2(arr) 3.297 E(ay)-.15 E F0 .797(is in-)3.297 F -.25(va)144 645.6 S (lid or unassignable, or if).25 E F2(arr)2.5 E(ay)-.15 E F0 (is not an inde)2.5 E -.15(xe)-.15 G 2.5(da).15 G(rray)-2.5 E(.)-.65 E F1(popd)108 662.4 Q F0<5bad>2.5 E F1(n)A F0 2.5(][)C(+)-2.5 E F2(n)A F0 2.5(][)C-2.5 E F2(n)A F0(])A(Remo)144 674.4 Q -.15(ve)-.15 G 2.799 (se).15 G .299(ntries from the directory stack.)-2.799 F -.4(Wi)5.299 G .299(th no ar).4 F .299(guments, remo)-.18 F -.15(ve)-.15 G 2.799(st).15 G .3(he top directory from the)-2.799 F 1.479(stack, and performs a)144 686.4 R F1(cd)3.979 E F0 1.479(to the ne)3.979 F 3.979(wt)-.25 G 1.479 (op directory)-3.979 F 6.479(.A)-.65 G -.18(rg)-6.479 G 1.478 (uments, if supplied, ha).18 F 1.778 -.15(ve t)-.2 H 1.478(he follo).15 F(wing)-.25 E(meanings:)144 698.4 Q F1144 710.4 Q F0 .551 (Suppresses the normal change of directory when remo)180 710.4 R .551 (ving directories from the stack, so)-.15 F (that only the stack is manipulated.)180 722.4 Q(GNU Bash 5.1)72 768 Q (2020 October 29)141.235 E(67)190.395 E 0 Cg EP %%Page: 68 68 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10/Times-Bold@0 SF(+)144 84 Q/F2 10/Times-Italic@0 SF(n)A F0(Remo)180 84 Q -.15(ve)-.15 G 2.64(st).15 G(he)-2.64 E F2(n)2.64 E F0 .14 (th entry counting from the left of the list sho)B .14(wn by)-.25 F F1 (dirs)2.64 E F0 2.64(,s)C .14(tarting with zero.)-2.64 F -.15(Fo)180 96 S 2.5(re).15 G(xample:)-2.65 E/F3 10/Courier@0 SF(popd +0)2.5 E F0(remo) 2.5 E -.15(ve)-.15 G 2.5(st).15 G(he \214rst directory)-2.5 E(,)-.65 E F3(popd +1)2.5 E F0(the second.)2.5 E F1144 108 Q F2(n)A F0(Remo)180 108 Q -.15(ve)-.15 G 3.759(st).15 G(he)-3.759 E F2(n)3.759 E F0 1.259 (th entry counting from the right of the list sho)B 1.26(wn by)-.25 F F1 (dirs)3.76 E F0 3.76(,s)C 1.26(tarting with)-3.76 F 2.5(zero. F)180 120 R(or e)-.15 E(xample:)-.15 E F3(popd -0)2.5 E F0(remo)2.5 E -.15(ve)-.15 G 2.5(st).15 G(he last directory)-2.5 E(,)-.65 E F3(popd -1)2.5 E F0 (the ne)2.5 E(xt to last.)-.15 E .644(If the)144 136.8 R F1(popd)3.144 E F0 .644(command is successful, a)3.144 F F1(dirs)3.143 E F0 .643 (is performed as well, and the return status is 0.)3.143 F F1(popd)5.643 E F0 .415(returns f)144 148.8 R .415(alse if an in)-.1 F -.25(va)-.4 G .415(lid option is encountered, the directory stack is empty).25 F 2.916 (,an)-.65 G(on-e)-2.916 E .416(xistent direc-)-.15 F (tory stack entry is speci\214ed, or the directory change f)144 160.8 Q (ails.)-.1 E F1(printf)108 177.6 Q F0([)2.5 E F1A F2(var)2.5 E F0 (])A F2(format)2.5 E F0([)2.5 E F2(ar)A(guments)-.37 E F0(])A .358 (Write the formatted)144 189.6 R F2(ar)2.858 E(guments)-.37 E F0 .358 (to the standard output under the control of the)2.858 F F2(format)2.857 E F0 5.357(.T)C(he)-5.357 E F12.857 E F0(op-)2.857 E .714 (tion causes the output to be assigned to the v)144 201.6 R(ariable)-.25 E F2(var)3.214 E F0 .714(rather than being printed to the standard)3.214 F(output.)144 213.6 Q(The)144 237.6 Q F2(format)3.018 E F0 .517(is a ch\ aracter string which contains three types of objects: plain characters,\ which are)3.018 F .704(simply copied to standard output, character esc\ ape sequences, which are con)144 249.6 R -.15(ve)-.4 G .704 (rted and copied to).15 F .036(the standard output, and format speci\ \214cations, each of which causes printing of the ne)144 261.6 R .036 (xt successi)-.15 F -.15(ve)-.25 G F2(ar)144 273.6 Q(gument)-.37 E F0 5.531(.I)C 3.031(na)-5.531 G .531(ddition to the standard)-3.031 F F2 (printf)3.032 E F0 .532(\(1\) format speci\214cations,)B F1(printf)3.032 E F0 .532(interprets the follo)3.032 F(w-)-.25 E(ing e)144 285.6 Q (xtensions:)-.15 E F1(%b)144 297.6 Q F0(causes)180 297.6 Q F1(printf) 2.596 E F0 .096(to e)2.596 F .096 (xpand backslash escape sequences in the corresponding)-.15 F F2(ar) 2.596 E(gument)-.37 E F0 .095(in the)2.595 F(same w)180 309.6 Q(ay as) -.1 E F1(echo \255e)2.5 E F0(.)A F1(%q)144 321.6 Q F0(causes)180 321.6 Q F1(printf)2.51 E F0 .01(to output the corresponding)2.51 F F2(ar)2.51 E (gument)-.37 E F0 .01(in a format that can be reused as shell)2.51 F (input.)180 333.6 Q F1(%\()144 345.6 Q F2(datefmt)A F1(\)T)A F0(causes) 180 357.6 Q F1(printf)4.404 E F0 1.904 (to output the date-time string resulting from using)4.404 F F2(datefmt) 4.404 E F0 1.903(as a format)4.404 F .38(string for)180 369.6 R F2 (strftime)2.881 E F0 2.881(\(3\). The)B(corresponding)2.881 E F2(ar) 2.881 E(gument)-.37 E F0 .381(is an inte)2.881 F .381 (ger representing the number)-.15 F .293(of seconds since the epoch.)180 381.6 R -1 -.8(Tw o)5.293 H .293(special ar)3.593 F .293(gument v)-.18 F .293(alues may be used: \2551 represents the)-.25 F .693 (current time, and \2552 represents the time the shell w)180 393.6 R .693(as in)-.1 F -.2(vo)-.4 G -.1(ke).2 G 3.194(d. If).1 F .694(no ar) 3.194 F .694(gument is speci-)-.18 F .21(\214ed, con)180 405.6 R -.15 (ve)-.4 G .21(rsion beha).15 F -.15(ve)-.2 G 2.71(sa).15 G 2.71(si)-2.71 G 2.71<66ad>-2.71 G 2.71(1h)-2.71 G .21(ad been gi)-2.71 F -.15(ve)-.25 G 2.71(n. This).15 F .21(is an e)2.71 F .21(xception to the usual)-.15 F F1(printf)2.71 E F0(beha)180 417.6 Q(vior)-.2 E(.)-.55 E .901 (The %b, %q, and %T directi)144 434.4 R -.15(ve)-.25 G 3.401(sa).15 G .901(ll use the \214eld width and precision ar)-3.401 F .902 (guments from the format)-.18 F .358(speci\214cation and write that man) 144 446.4 R 2.858(yb)-.15 G .357 (ytes from \(or use that wide a \214eld for\) the e)-2.858 F .357 (xpanded ar)-.15 F(gument,)-.18 E (which usually contains more characters than the original.)144 458.4 Q (Ar)144 475.2 Q .463(guments to non-string format speci\214ers are trea\ ted as C constants, e)-.18 F .464(xcept that a leading plus or)-.15 F 1.259(minus sign is allo)144 487.2 R 1.259 (wed, and if the leading character is a single or double quote, the v) -.25 F 1.258(alue is the)-.25 F(ASCII v)144 499.2 Q(alue of the follo) -.25 E(wing character)-.25 E(.)-.55 E(The)144 516 Q F2(format)2.514 E F0 .015(is reused as necessary to consume all of the)2.514 F F2(ar)2.515 E (guments)-.37 E F0 5.015(.I)C 2.515(ft)-5.015 G(he)-2.515 E F2(format) 2.515 E F0 .015(requires more)2.515 F F2(ar)2.515 E(-)-.2 E(guments)144 528 Q F0 .566(than are supplied, the e)3.066 F .566 (xtra format speci\214cations beha)-.15 F .866 -.15(ve a)-.2 H 3.066(si) .15 G 3.065(faz)-3.066 G .565(ero v)-3.065 F .565(alue or null string,) -.25 F(as appropriate, had been supplied.)144 540 Q(The return v)5 E (alue is zero on success, non-zero on f)-.25 E(ailure.)-.1 E F1(pushd) 108 556.8 Q F0([)2.5 E F1A F0 2.5(][)C(+)-2.5 E F2(n)A F0 2.5(][)C -2.5 E F2(n)A F0(])A F1(pushd)108 568.8 Q F0([)2.5 E F1A F0 2.5(][)C F2(dir)-2.5 E F0(])A .639(Adds a directory to the top of the d\ irectory stack, or rotates the stack, making the ne)144 580.8 R 3.14(wt) -.25 G .64(op of the)-3.14 F .417(stack the current w)144 592.8 R .416 (orking directory)-.1 F 5.416(.W)-.65 G .416(ith no ar)-5.816 F (guments,)-.18 E F1(pushd)2.916 E F0 -.15(ex)2.916 G .416 (changes the top tw).15 F 2.916(od)-.1 G(irectories)-2.916 E 1.625 (and returns 0, unless the directory stack is empty)144 604.8 R 6.625 (.A)-.65 G -.18(rg)-6.625 G 1.625(uments, if supplied, ha).18 F 1.925 -.15(ve t)-.2 H 1.625(he follo).15 F(wing)-.25 E(meanings:)144 616.8 Q F1144 628.8 Q F0 1.811(Suppresses the normal change of directory \ when rotating or adding directories to the)180 628.8 R (stack, so that only the stack is manipulated.)180 640.8 Q F1(+)144 652.8 Q F2(n)A F0 1.267(Rotates the stack so that the)180 652.8 R F2(n) 3.767 E F0 1.268(th directory \(counting from the left of the list sho)B 1.268(wn by)-.25 F F1(dirs)180 664.8 Q F0 2.5(,s)C (tarting with zero\) is at the top.)-2.5 E F1144 676.8 Q F2(n)A F0 .92(Rotates the stack so that the)180 676.8 R F2(n)3.42 E F0 .92 (th directory \(counting from the right of the list sho)B .92(wn by)-.25 F F1(dirs)180 688.8 Q F0 2.5(,s)C(tarting with zero\) is at the top.) -2.5 E F2(dir)144.35 700.8 Q F0(Adds)180 700.8 Q F2(dir)3.137 E F0 .287 (to the directory stack at the top, making it the ne)3.517 F 2.788(wc) -.25 G .288(urrent w)-2.788 F .288(orking directory as)-.1 F (if it had been supplied as the ar)180 712.8 Q(gument to the)-.18 E F1 (cd)2.5 E F0 -.2(bu)2.5 G(iltin.).2 E .489(If the)144 729.6 R F1(pushd) 2.989 E F0 .489(command is successful, a)2.989 F F1(dirs)2.988 E F0 .488 (is performed as well.)2.988 F .488(If the \214rst form is used,)5.488 F F1(pushd)2.988 E F0(GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(68) 190.395 E 0 Cg EP %%Page: 69 69 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E 1.039 (returns 0 unless the cd to)144 84 R/F1 10/Times-Italic@0 SF(dir)3.889 E F0 -.1(fa)4.269 G 3.539(ils. W).1 F 1.039(ith the second form,)-.4 F/F2 10/Times-Bold@0 SF(pushd)3.54 E F0 1.04(returns 0 unless the directory) 3.54 F .847(stack is empty)144 96 R 3.347(,an)-.65 G(on-e)-3.347 E .847 (xistent directory stack element is speci\214ed, or the directory chang\ e to the)-.15 F(speci\214ed ne)144 108 Q 2.5(wc)-.25 G (urrent directory f)-2.5 E(ails.)-.1 E F2(pwd)108 124.8 Q F0([)2.5 E F2 (\255LP)A F0(])A .844(Print the absolute pathname of the current w)144 136.8 R .845(orking directory)-.1 F 5.845(.T)-.65 G .845 (he pathname printed contains no)-5.845 F .182(symbolic links if the)144 148.8 R F22.681 E F0 .181(option is supplied or the)2.681 F F2 .181(\255o ph)2.681 F(ysical)-.15 E F0 .181(option to the)2.681 F F2 (set)2.681 E F0 -.2(bu)2.681 G .181(iltin command is).2 F 3.263 (enabled. If)144 160.8 R(the)3.263 E F23.263 E F0 .763 (option is used, the pathname printed may contain symbolic links.)3.263 F .764(The return)5.764 F .405(status is 0 unless an error occurs while\ reading the name of the current directory or an in)144 172.8 R -.25(va) -.4 G .405(lid op-).25 F(tion is supplied.)144 184.8 Q F2 -.18(re)108 201.6 S(ad).18 E F0([)3.816 E F2(\255ers)A F0 3.816(][)C F2-3.816 E F1(aname)3.816 E F0 3.816(][)C F2-3.816 E F1(delim)3.816 E F0 3.816(][)C F2-3.816 E F1(te)3.816 E(xt)-.2 E F0 3.816(][)C F2 -3.816 E F1(nc)3.816 E(har)-.15 E(s)-.1 E F0 3.817(][)C F2 -3.817 E F1(nc)3.817 E(har)-.15 E(s)-.1 E F0 3.817(][)C F2-3.817 E F1(pr)3.817 E(ompt)-.45 E F0 3.817(][)C F2-3.817 E F1(timeout) 3.817 E F0 3.817(][)C F2-3.817 E F1(fd)3.817 E F0(])A([)108 213.6 Q F1(name)A F0(...])2.5 E .516(One line is read from the standard input\ , or from the \214le descriptor)144 225.6 R F1(fd)3.016 E F0 .516 (supplied as an ar)3.016 F .516(gument to)-.18 F(the)144 237.6 Q F2 2.935 E F0 .435(option, split into w)2.935 F .435 (ords as described abo)-.1 F .735 -.15(ve u)-.15 H(nder).15 E F2 -.75 (Wo)2.935 G .435(rd Splitting).75 F F0 2.935(,a)C .436(nd the \214rst w) -2.935 F .436(ord is as-)-.1 F .376(signed to the \214rst)144 249.6 R F1 (name)3.236 E F0 2.876(,t).18 G .376(he second w)-2.876 F .376 (ord to the second)-.1 F F1(name)3.236 E F0 2.876(,a).18 G .376 (nd so on.)-2.876 F .375(If there are more w)5.376 F(ords)-.1 E .236 (than names, the remaining w)144 261.6 R .237(ords and their interv)-.1 F .237(ening delimiters are assigned to the last)-.15 F F1(name)3.097 E F0 5.237(.I).18 G(f)-5.237 E .875(there are fe)144 273.6 R .875(wer w) -.25 F .875(ords read from the input stream than names, the remaining n\ ames are assigned)-.1 F .517(empty v)144 285.6 R 3.017(alues. The)-.25 F .517(characters in)3.017 F/F3 9/Times-Bold@0 SF(IFS)3.017 E F0 .518 (are used to split the line into w)2.767 F .518 (ords using the same rules the)-.1 F .027(shell uses for e)144 297.6 R .026(xpansion \(described abo)-.15 F .326 -.15(ve u)-.15 H(nder).15 E F2 -.75(Wo)2.526 G .026(rd Splitting).75 F F0 2.526(\). The)B .026 (backslash character \()2.526 F F2(\\)A F0 2.526(\)m)C(ay)-2.526 E .488 (be used to remo)144 309.6 R .788 -.15(ve a)-.15 H .788 -.15(ny s).15 H .488(pecial meaning for the ne).15 F .488 (xt character read and for line continuation.)-.15 F(Op-)5.489 E (tions, if supplied, ha)144 321.6 Q .3 -.15(ve t)-.2 H(he follo).15 E (wing meanings:)-.25 E F2144 333.6 Q F1(aname)2.5 E F0 1.026 (The w)180 345.6 R 1.026 (ords are assigned to sequential indices of the array v)-.1 F(ariable) -.25 E F1(aname)3.855 E F0 3.525(,s).18 G 1.025(tarting at 0.)-3.525 F F1(aname)180.33 357.6 Q F0(is unset before an)2.68 E 2.5(yn)-.15 G .5 -.25(ew va)-2.5 H(lues are assigned.).25 E(Other)5 E F1(name)2.5 E F0 (ar)2.5 E(guments are ignored.)-.18 E F2144 369.6 Q F1(delim)2.5 E F0 .28(The \214rst character of)180 381.6 R F1(delim)2.78 E F0 .281 (is used to terminate the input line, rather than ne)2.78 F 2.781 (wline. If)-.25 F F1(de-)2.781 E(lim)180 393.6 Q F0 (is the empty string,)2.5 E F2 -.18(re)2.5 G(ad).18 E F0 (will terminate a line when it reads a NUL character)2.5 E(.)-.55 E F2 144 405.6 Q F0 .373 (If the standard input is coming from a terminal,)180 405.6 R F2 -.18 (re)2.873 G(adline).18 E F0(\(see)2.873 E F3(READLINE)2.872 E F0(abo) 2.622 E -.15(ve)-.15 G 2.872(\)i).15 G 2.872(su)-2.872 G(sed)-2.872 E .218(to obtain the line.)180 417.6 R .218 (Readline uses the current \(or def)5.218 F .218 (ault, if line editing w)-.1 F .218(as not pre)-.1 F(viously)-.25 E (acti)180 429.6 Q -.15(ve)-.25 G 2.5(\)e).15 G(diting settings, b)-2.5 E (ut uses Readline')-.2 E 2.5(sd)-.55 G(ef)-2.5 E (ault \214lename completion.)-.1 E F2144 441.6 Q F1(te)2.5 E(xt) -.2 E F0(If)180 441.6 Q F2 -.18(re)2.716 G(adline).18 E F0 .216 (is being used to read the line,)2.716 F F1(te)2.716 E(xt)-.2 E F0 .216 (is placed into the editing b)2.716 F(uf)-.2 E .215(fer before edit-) -.25 F(ing be)180 453.6 Q(gins.)-.15 E F2144 465.6 Q F1(nc)2.5 E (har)-.15 E(s)-.1 E F2 -.18(re)180 477.6 S(ad).18 E F0 .322 (returns after reading)2.822 F F1(nc)2.823 E(har)-.15 E(s)-.1 E F0 .323 (characters rather than w)2.823 F .323 (aiting for a complete line of in-)-.1 F(put, b)180 489.6 Q (ut honors a delimiter if fe)-.2 E(wer than)-.25 E F1(nc)2.5 E(har)-.15 E(s)-.1 E F0(characters are read before the delimiter)2.5 E(.)-.55 E F2 144 501.6 Q F1(nc)2.5 E(har)-.15 E(s)-.1 E F2 -.18(re)180 513.6 S (ad).18 E F0 1.269(returns after reading e)3.77 F(xactly)-.15 E F1(nc) 3.769 E(har)-.15 E(s)-.1 E F0 1.269(characters rather than w)3.769 F 1.269(aiting for a complete)-.1 F .274 (line of input, unless EOF is encountered or)180 525.6 R F2 -.18(re) 2.775 G(ad).18 E F0 .275(times out.)2.775 F .275 (Delimiter characters encoun-)5.275 F 1.003 (tered in the input are not treated specially and do not cause)180 537.6 R F2 -.18(re)3.502 G(ad).18 E F0 1.002(to return until)3.502 F F1(nc) 3.502 E(har)-.15 E(s)-.1 E F0 .608(characters are read.)180 549.6 R .608 (The result is not split on the characters in)5.608 F F2(IFS)3.108 E F0 3.108(;t)C .609(he intent is that the)-3.108 F -.25(va)180 561.6 S .67 (riable is assigned e).25 F .669 (xactly the characters read \(with the e)-.15 F .669 (xception of backslash; see the)-.15 F F2180 573.6 Q F0 (option belo)2.5 E(w\).)-.25 E F2144 585.6 Q F1(pr)2.5 E(ompt)-.45 E F0(Display)180 597.6 Q F1(pr)3.66 E(ompt)-.45 E F0 1.161 (on standard error)3.66 F 3.661(,w)-.4 G 1.161(ithout a trailing ne) -3.661 F 1.161(wline, before attempting to read)-.25 F(an)180 609.6 Q 2.5(yi)-.15 G 2.5(nput. The)-2.5 F (prompt is displayed only if input is coming from a terminal.)2.5 E F2 144 621.6 Q F0 .544(Backslash does not act as an escape character) 180 621.6 R 5.543(.T)-.55 G .543 (he backslash is considered to be part of)-5.543 F .492(the line.)180 633.6 R .492(In particular)5.492 F 2.992(,ab)-.4 G(ackslash-ne)-2.992 E .493(wline pair may not then be used as a line continua-)-.25 F(tion.) 180 645.6 Q F2144 657.6 Q F0(Silent mode.)180 657.6 Q (If input is coming from a terminal, characters are not echoed.)5 E F2 144 669.6 Q F1(timeout)2.5 E F0(Cause)180 681.6 Q F2 -.18(re)2.929 G(ad).18 E F0 .428(to time out and return f)2.929 F .428 (ailure if a complete line of input \(or a speci\214ed num-)-.1 F .56 (ber of characters\) is not read within)180 693.6 R F1(timeout)3.061 E F0(seconds.)3.061 E F1(timeout)5.561 E F0 .561(may be a decimal number) 3.061 F(with a fractional portion follo)180 705.6 Q (wing the decimal point.)-.25 E(This option is only ef)5 E(fecti)-.25 E .3 -.15(ve i)-.25 H(f).15 E F2 -.18(re)2.5 G(ad).18 E F0 .506(is readin\ g input from a terminal, pipe, or other special \214le; it has no ef)180 717.6 R .506(fect when reading)-.25 F .59(from re)180 729.6 R .59 (gular \214les.)-.15 F(If)5.59 E F2 -.18(re)3.09 G(ad).18 E F0 .589 (times out,)3.09 F F2 -.18(re)3.089 G(ad).18 E F0(sa)3.089 E -.15(ve)-.2 G 3.089(sa).15 G .889 -.15(ny p)-3.089 H .589 (artial input read into the speci\214ed).15 F(GNU Bash 5.1)72 768 Q (2020 October 29)141.235 E(69)190.395 E 0 Cg EP %%Page: 70 70 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E -.25(va)180 84 S (riable).25 E/F1 10/Times-Italic@0 SF(name)2.77 E F0 5.27(.I)C(f)-5.27 E F1(timeout)2.77 E F0 .27(is 0,)2.77 F/F2 10/Times-Bold@0 SF -.18(re)2.77 G(ad).18 E F0 .27(returns immediately)2.77 F 2.77(,w)-.65 G .27 (ithout trying to read an)-2.77 F 2.77(yd)-.15 G(ata.)-2.77 E 1.12 (The e)180 96 R 1.12(xit status is 0 if input is a)-.15 F -.25(va)-.2 G 1.12(ilable on the speci\214ed \214le descriptor).25 F 3.62(,n)-.4 G 1.12(on-zero other)-3.62 F(-)-.2 E 2.5(wise. The)180 108 R -.15(ex)2.5 G (it status is greater than 128 if the timeout is e).15 E(xceeded.)-.15 E F2144 120 Q F1(fd)2.5 E F0(Read input from \214le descriptor)180 120 Q F1(fd)2.5 E F0(.)A .522(If no)144 136.8 R F1(names)3.382 E F0 .522 (are supplied, the line read, without the ending delimiter b)3.292 F .522(ut otherwise unmodi\214ed, is)-.2 F 1.187(assigned to the v)144 148.8 R(ariable)-.25 E/F3 9/Times-Bold@0 SF(REPL)3.686 E(Y)-.828 E/F4 9 /Times-Roman@0 SF(.)A F0 1.186(The e)5.686 F 1.186 (xit status is zero, unless end-of-\214le is encountered,)-.15 F F2 -.18 (re)3.686 G(ad).18 E F0 .96 (times out \(in which case the status is greater than 128\), a v)144 160.8 R .961(ariable assignment error \(such as as-)-.25 F .707 (signing to a readonly v)144 172.8 R .706(ariable\) occurs, or an in) -.25 F -.25(va)-.4 G .706(lid \214le descriptor is supplied as the ar) .25 F .706(gument to)-.18 F F2144 184.8 Q F0(.)A F2 -.18(re)108 201.6 S(adonly).18 E F0([)2.5 E F2(\255aAf)A F0 2.5(][)C F2-2.5 E F0 2.5(][)C F1(name)-2.5 E F0([=)A F1(wor)A(d)-.37 E F0 2.5(].)C(..]) -2.5 E .77(The gi)144 213.6 R -.15(ve)-.25 G(n).15 E F1(names)3.27 E F0 .77(are mark)3.27 F .77(ed readonly; the v)-.1 F .77(alues of these)-.25 F F1(names)3.63 E F0 .77(may not be changed by subse-)3.54 F 1.097 (quent assignment.)144 225.6 R 1.097(If the)6.097 F F23.597 E F0 1.097(option is supplied, the functions corresponding to the)3.597 F F1 (names)3.596 E F0 1.096(are so)3.596 F(mark)144 237.6 Q 3.334(ed. The) -.1 F F23.334 E F0 .834(option restricts the v)3.334 F .834 (ariables to inde)-.25 F -.15(xe)-.15 G 3.334(da).15 G .834(rrays; the) -3.334 F F23.334 E F0 .834(option restricts the v)3.334 F(ari-) -.25 E .777(ables to associati)144 249.6 R 1.077 -.15(ve a)-.25 H 3.277 (rrays. If).15 F .777(both options are supplied,)3.277 F F23.277 E F0(tak)3.277 E .776(es precedence.)-.1 F .776(If no)5.776 F F1(name) 3.636 E F0(ar)3.456 E(gu-)-.18 E .521(ments are gi)144 261.6 R -.15(ve) -.25 G .521(n, or if the).15 F F23.021 E F0 .521 (option is supplied, a list of all readonly names is printed.)3.021 F .522(The other)5.521 F .295(options may be used to restrict the output \ to a subset of the set of readonly names.)144 273.6 R(The)5.295 E F2 2.795 E F0(option)2.795 E .786 (causes output to be displayed in a format that may be reused as input.) 144 285.6 R .786(If a v)5.786 F .786(ariable name is fol-)-.25 F(lo)144 297.6 Q .718(wed by =)-.25 F F1(wor)A(d)-.37 E F0 3.218(,t)C .718(he v) -3.218 F .718(alue of the v)-.25 F .718(ariable is set to)-.25 F F1(wor) 3.218 E(d)-.37 E F0 5.718(.T)C .718(he return status is 0 unless an in) -5.718 F -.25(va)-.4 G(lid).25 E .26(option is encountered, one of the) 144 309.6 R F1(names)3.12 E F0 .26(is not a v)3.03 F .26(alid shell v) -.25 F .26(ariable name, or)-.25 F F22.76 E F0 .26 (is supplied with a)2.76 F F1(name)144.36 321.6 Q F0 (that is not a function.)2.68 E F2 -.18(re)108 338.4 S(tur).18 E(n)-.15 E F0([)2.5 E F1(n)A F0(])A .021(Causes a function to stop e)144 350.4 R -.15(xe)-.15 G .021(cuting and return the v).15 F .021 (alue speci\214ed by)-.25 F F1(n)2.88 E F0 .02(to its caller)2.76 F 5.02 (.I)-.55 G(f)-5.02 E F1(n)2.88 E F0 .02(is omitted,)2.76 F .596 (the return status is that of the last command e)144 362.4 R -.15(xe) -.15 G .597(cuted in the function body).15 F 5.597(.I)-.65 G(f)-5.597 E F2 -.18(re)3.097 G(tur).18 E(n)-.15 E F0 .597(is e)3.097 F -.15(xe)-.15 G(cuted).15 E .267(by a trap handler)144 374.4 R 2.767(,t)-.4 G .267 (he last command used to determine the status is the last command e) -2.767 F -.15(xe)-.15 G .267(cuted be-).15 F .02(fore the trap handler) 144 386.4 R 5.02(.I)-.55 G(f)-5.02 E F2 -.18(re)2.52 G(tur).18 E(n)-.15 E F0 .02(is e)2.52 F -.15(xe)-.15 G .02(cuted during a).15 F F2(DEB)2.52 E(UG)-.1 E F0 .02(trap, the last command used to deter)2.52 F(-)-.2 E .886(mine the status is the last command e)144 398.4 R -.15(xe)-.15 G .886(cuted by the trap handler before).15 F F2 -.18(re)3.385 G(tur).18 E (n)-.15 E F0 -.1(wa)3.385 G 3.385(si).1 G -1.9 -.4(nv o)-3.385 H -.1(ke) .4 G 3.385(d. If).1 F F2 -.18(re)144 410.4 S(tur).18 E(n)-.15 E F0 .627 (is used outside a function, b)3.127 F .628(ut during e)-.2 F -.15(xe) -.15 G .628(cution of a script by the).15 F F2(.)3.128 E F0(\()5.628 E F2(sour)A(ce)-.18 E F0 3.128(\)c)C .628(ommand, it)-3.128 F .589 (causes the shell to stop e)144 422.4 R -.15(xe)-.15 G .589 (cuting that script and return either).15 F F1(n)3.448 E F0 .588 (or the e)3.328 F .588(xit status of the last com-)-.15 F .325(mand e) 144 434.4 R -.15(xe)-.15 G .325(cuted within the script as the e).15 F .326(xit status of the script.)-.15 F(If)5.326 E F1(n)2.826 E F0 .326 (is supplied, the return v)2.826 F .326(alue is)-.25 F .445 (its least signi\214cant 8 bits.)144 446.4 R .444 (The return status is non-zero if)5.445 F F2 -.18(re)2.944 G(tur).18 E (n)-.15 E F0 .444(is supplied a non-numeric ar)2.944 F(gu-)-.18 E .381 (ment, or is used outside a function and not during e)144 458.4 R -.15 (xe)-.15 G .381(cution of a script by).15 F F2(.)2.881 E F0(or)3.714 E F2(sour)2.881 E(ce)-.18 E F0 5.381(.A)C .681 -.15(ny c)-5.381 H(om-).15 E .75(mand associated with the)144 470.4 R F2(RETURN)3.249 E F0 .749 (trap is e)3.249 F -.15(xe)-.15 G .749(cuted before e).15 F -.15(xe)-.15 G .749(cution resumes after the function).15 F(or script.)144 482.4 Q F2 (set)108 499.2 Q F0([)2.5 E F2(\255\255abefhkmnptuvxBCEHPT)A F0 2.5(][)C F2-2.5 E F1(option\255name)2.5 E F0 2.5(][)C F1(ar)-2.5 E(g)-.37 E F0(...])2.5 E F2(set)108 511.2 Q F0([)2.5 E F2(+abefhkmnptuvxBCEHPT)A F0 2.5(][)C F2(+o)-2.5 E F1(option\255name)2.5 E F0 2.5(][)C F1(ar)-2.5 E (g)-.37 E F0(...])2.5 E -.4(Wi)144 523.2 S .835 (thout options, the name and v).4 F .835(alue of each shell v)-.25 F .836(ariable are displayed in a format that can be)-.25 F .784 (reused as input for setting or resetting the currently-set v)144 535.2 R 3.284(ariables. Read-only)-.25 F -.25(va)3.284 G .783 (riables cannot be).25 F 2.946(reset. In)144 547.2 R F1 .447(posix mode) 2.946 F F0 2.947(,o)C .447(nly shell v)-2.947 F .447 (ariables are listed.)-.25 F .447 (The output is sorted according to the current)5.447 F 3.531 (locale. When)144 559.2 R 1.031(options are speci\214ed, the)3.531 F 3.531(ys)-.15 G 1.031(et or unset shell attrib)-3.531 F 3.53(utes. An) -.2 F 3.53(ya)-.15 G -.18(rg)-3.53 G 1.03(uments remaining).18 F .584 (after option processing are treated as v)144 571.2 R .585 (alues for the positional parameters and are assigned, in or)-.25 F(-) -.2 E(der)144 583.2 Q 2.5(,t)-.4 G(o)-2.5 E F2($1)2.5 E F0(,)A F2($2)2.5 E F0(,)A F2 2.5(... $)2.5 F F1(n)A F0 5(.O)C(ptions, if speci\214ed, ha) -5 E .3 -.15(ve t)-.2 H(he follo).15 E(wing meanings:)-.25 E F2144 595.2 Q F0 1.378(Each v)184 595.2 R 1.377 (ariable or function that is created or modi\214ed is gi)-.25 F -.15(ve) -.25 G 3.877(nt).15 G 1.377(he e)-3.877 F 1.377(xport attrib)-.15 F 1.377(ute and)-.2 F(mark)184 607.2 Q(ed for e)-.1 E(xport to the en)-.15 E(vironment of subsequent commands.)-.4 E F2144 619.2 Q F0 .131 (Report the status of terminated background jobs immediately)184 619.2 R 2.632(,r)-.65 G .132(ather than before the ne)-2.632 F(xt)-.15 E (primary prompt.)184 631.2 Q(This is ef)5 E(fecti)-.25 E .3 -.15(ve o) -.25 H(nly when job control is enabled.).15 E F2144 643.2 Q F0 .088(Exit immediately if a)184 643.2 R F1(pipeline)2.588 E F0 .087 (\(which may consist of a single)2.588 F F1 .087(simple command)2.587 F F0 .087(\), a)B F1(list)2.587 E F0 2.587(,o)C(r)-2.587 E(a)184 655.2 Q F1 1.52(compound command)4.02 F F0(\(see)4.021 E F3 1.521(SHELL GRAMMAR) 4.021 F F0(abo)3.771 E -.15(ve)-.15 G 1.521(\), e).15 F 1.521 (xits with a non-zero status.)-.15 F .08(The shell does not e)184 667.2 R .079(xit if the command that f)-.15 F .079 (ails is part of the command list immediately)-.1 F(follo)184 679.2 Q 1.654(wing a)-.25 F F2(while)4.154 E F0(or)4.154 E F2(until)4.154 E F0 -.1(ke)4.154 G(yw)-.05 E 1.655(ord, part of the test follo)-.1 F 1.655 (wing the)-.25 F F2(if)4.155 E F0(or)4.155 E F2(elif)4.155 E F0(reserv) 4.155 E(ed)-.15 E -.1(wo)184 691.2 S .582(rds, part of an).1 F 3.082(yc) -.15 G .582(ommand e)-3.082 F -.15(xe)-.15 G .581(cuted in a).15 F F2 (&&)3.081 E F0(or)3.081 E F2(||)3.081 E F0 .581(list e)3.081 F .581 (xcept the command follo)-.15 F(wing)-.25 E .917(the \214nal)184 703.2 R F2(&&)3.417 E F0(or)3.417 E F2(||)3.417 E F0 3.417(,a)C 1.217 -.15(ny c) -3.417 H .918(ommand in a pipeline b).15 F .918 (ut the last, or if the command')-.2 F 3.418(sr)-.55 G(eturn)-3.418 E -.25(va)184 715.2 S .661(lue is being in).25 F -.15(ve)-.4 G .661 (rted with).15 F F2(!)3.161 E F0 5.661(.I)C 3.161(fac)-5.661 G .66 (ompound command other than a subshell returns a)-3.161 F 1.112 (non-zero status because a command f)184 727.2 R 1.112(ailed while)-.1 F F23.612 E F0 -.1(wa)3.612 G 3.612(sb).1 G 1.113 (eing ignored, the shell does)-3.612 F(GNU Bash 5.1)72 768 Q (2020 October 29)141.235 E(70)190.395 E 0 Cg EP %%Page: 71 71 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E .178(not e)184 84 R 2.678(xit. A)-.15 F .178(trap on)2.678 F/F1 10/Times-Bold@0 SF(ERR) 2.678 E F0 2.678(,i)C 2.678(fs)-2.678 G .178(et, is e)-2.678 F -.15(xe) -.15 G .178(cuted before the shell e).15 F 2.677(xits. This)-.15 F .177 (option applies to)2.677 F .617(the shell en)184 96 R .617 (vironment and each subshell en)-.4 F .617(vironment separately \(see) -.4 F/F2 9/Times-Bold@0 SF .618(COMMAND EXE-)3.118 F .643(CUTION ENVIR) 184 108 R(ONMENT)-.27 E F0(abo)2.893 E -.15(ve)-.15 G .643 (\), and may cause subshells to e).15 F .643(xit before e)-.15 F -.15 (xe)-.15 G .642(cuting all).15 F(the commands in the subshell.)184 120 Q .998(If a compound command or shell function e)184 138 R -.15(xe)-.15 G .999(cutes in a conte).15 F .999(xt where)-.15 F F13.499 E F0 .999 (is being ig-)3.499 F .089(nored, none of the commands e)184 150 R -.15 (xe)-.15 G .089(cuted within the compound command or function body).15 F .502(will be af)184 162 R .502(fected by the)-.25 F F13.002 E F0 .502(setting, e)3.002 F -.15(ve)-.25 G 3.002(ni).15 G(f)-3.002 E F1 3.002 E F0 .502(is set and a command returns a f)3.002 F .503 (ailure sta-)-.1 F 4.184(tus. If)184 174 R 4.184(ac)4.184 G 1.684 (ompound command or shell function sets)-4.184 F F14.183 E F0 1.683(while e)4.183 F -.15(xe)-.15 G 1.683(cuting in a conte).15 F(xt) -.15 E(where)184 186 Q F13.153 E F0 .653 (is ignored, that setting will not ha)3.153 F .954 -.15(ve a)-.2 H .954 -.15(ny e).15 H -.25(ff).15 G .654(ect until the compound command).25 F (or the command containing the function call completes.)184 198 Q F1 144 210 Q F0(Disable pathname e)184 210 Q(xpansion.)-.15 E F1 144 222 Q F0 .988(Remember the location of commands as the)184 222 R 3.488(ya)-.15 G .988(re look)-3.488 F .988(ed up for e)-.1 F -.15(xe) -.15 G 3.488(cution. This).15 F .987(is en-)3.487 F(abled by def)184 234 Q(ault.)-.1 E F1144 246 Q F0 .513(All ar)184 246 R .514 (guments in the form of assignment statements are placed in the en)-.18 F .514(vironment for a)-.4 F (command, not just those that precede the command name.)184 258 Q F1 144 270 Q F0 .149(Monitor mode.)184 270 R .149 (Job control is enabled.)5.149 F .148(This option is on by def)5.149 F .148(ault for interacti)-.1 F .448 -.15(ve s)-.25 H(hells).15 E .65 (on systems that support it \(see)184 282 R F2 .651(JOB CONTR)3.151 F (OL)-.27 E F0(abo)2.901 E -.15(ve)-.15 G 3.151(\). All).15 F .651 (processes run in a separate)3.151 F .679(process group.)184 294 R .678 (When a background job completes, the shell prints a line containing it\ s)5.679 F -.15(ex)184 306 S(it status.).15 E F1144 318 Q F0 .652 (Read commands b)184 318 R .652(ut do not e)-.2 F -.15(xe)-.15 G .652 (cute them.).15 F .653(This may be used to check a shell script for) 5.652 F(syntax errors.)184 330 Q(This is ignored by interacti)5 E .3 -.15(ve s)-.25 H(hells.).15 E F1144 342 Q/F3 10/Times-Italic@0 SF (option\255name)2.5 E F0(The)184 354 Q F3(option\255name)2.5 E F0 (can be one of the follo)2.5 E(wing:)-.25 E F1(allexport)184 366 Q F0 (Same as)224 378 Q F12.5 E F0(.)A F1(braceexpand)184 390 Q F0 (Same as)224 402 Q F12.5 E F0(.)A F1(emacs)184 414 Q F0 .089 (Use an emacs-style command line editing interf)224 414 R 2.589 (ace. This)-.1 F .089(is enabled by def)2.589 F(ault)-.1 E .95 (when the shell is interacti)224 426 R -.15(ve)-.25 G 3.45(,u).15 G .95 (nless the shell is started with the)-3.45 F F1(\255\255noediting)3.45 E F0 2.5(option. This)224 438 R(also af)2.5 E(fects the editing interf) -.25 E(ace used for)-.1 E F1 -.18(re)2.5 G(ad \255e).18 E F0(.)A F1(err) 184 450 Q(exit)-.18 E F0(Same as)224 450 Q F12.5 E F0(.)A F1 (errtrace)184 462 Q F0(Same as)224 462 Q F12.5 E F0(.)A F1 (functrace)184 474 Q F0(Same as)224 486 Q F12.5 E F0(.)A F1 (hashall)184 498 Q F0(Same as)224 498 Q F12.5 E F0(.)A F1 (histexpand)184 510 Q F0(Same as)224 522 Q F12.5 E F0(.)A F1 (history)184 534 Q F0 .587(Enable command history)224 534 R 3.087(,a) -.65 G 3.087(sd)-3.087 G .587(escribed abo)-3.087 F .887 -.15(ve u)-.15 H(nder).15 E F2(HIST)3.087 E(OR)-.162 E(Y)-.315 E/F4 9/Times-Roman@0 SF (.)A F0 .587(This option is)5.087 F(on by def)224 546 Q (ault in interacti)-.1 E .3 -.15(ve s)-.25 H(hells.).15 E F1(ignor)184 558 Q(eeof)-.18 E F0 1.656(The ef)224 570 R 1.656 (fect is as if the shell command)-.25 F/F5 10/Courier@0 SF(IGNOREEOF=10) 4.157 E F0 1.657(had been e)4.157 F -.15(xe)-.15 G(cuted).15 E(\(see)224 582 Q F1(Shell V)2.5 E(ariables)-.92 E F0(abo)2.5 E -.15(ve)-.15 G(\).) .15 E F1 -.1(ke)184 594 S(yw).1 E(ord)-.1 E F0(Same as)224 606 Q F1 2.5 E F0(.)A F1(monitor)184 618 Q F0(Same as)224 618 Q F12.5 E F0(.)A F1(noclob)184 630 Q(ber)-.1 E F0(Same as)224 642 Q F12.5 E F0(.)A F1(noexec)184 654 Q F0(Same as)224 654 Q F12.5 E F0(.)A F1(noglob)184 666 Q F0(Same as)224 666 Q F12.5 E F0(.)A F1(nolog) 184 678 Q F0(Currently ignored.)224 678 Q F1(notify)184 690 Q F0 (Same as)224 690 Q F12.5 E F0(.)A F1(nounset)184 702 Q F0(Same as) 224 702 Q F12.5 E F0(.)A F1(onecmd)184 714 Q F0(Same as)224 714 Q F12.5 E F0(.)A(GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(71) 190.395 E 0 Cg EP %%Page: 72 72 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10/Times-Bold@0 SF(ph)184 84 Q(ysical)-.15 E F0(Same as)224 84 Q F12.5 E F0(.)A F1 (pipefail)184 96 Q F0 1.03(If set, the return v)224 96 R 1.029 (alue of a pipeline is the v)-.25 F 1.029 (alue of the last \(rightmost\) com-)-.25 F 1.136(mand to e)224 108 R 1.136 (xit with a non-zero status, or zero if all commands in the pipeline) -.15 F -.15(ex)224 120 S(it successfully).15 E 5(.T)-.65 G (his option is disabled by def)-5 E(ault.)-.1 E F1(posix)184 132 Q F0 2.091(Change the beha)224 132 R 2.091(vior of)-.2 F F1(bash)4.591 E F0 2.091(where the def)4.591 F 2.091(ault operation dif)-.1 F 2.091 (fers from the)-.25 F 1.212(POSIX standard to match the standard \()224 144 R/F2 10/Times-Italic@0 SF 1.212(posix mode)B F0 3.712(\). See)B/F3 9 /Times-Bold@0 SF 1.212(SEE ALSO)3.712 F F0(belo)3.463 E(w)-.25 E .955 (for a reference to a document that details ho)224 156 R 3.454(wp)-.25 G .954(osix mode af)-3.454 F .954(fects bash')-.25 F 3.454(sb)-.55 G(e-) -3.454 E(ha)224 168 Q(vior)-.2 E(.)-.55 E F1(pri)184 180 Q(vileged)-.1 E F0(Same as)224 192 Q F12.5 E F0(.)A F1 -.1(ve)184 204 S(rbose).1 E F0(Same as)224 204 Q F12.5 E F0(.)A F1(vi)184 216 Q F0 .209 (Use a vi-style command line editing interf)224 216 R 2.709(ace. This) -.1 F .209(also af)2.709 F .21(fects the editing in-)-.25 F(terf)224 228 Q(ace used for)-.1 E F1 -.18(re)2.5 G(ad \255e).18 E F0(.)A F1(xtrace) 184 240 Q F0(Same as)224 240 Q F12.5 E F0(.)A(If)184 258 Q F1 3.053 E F0 .553(is supplied with no)3.053 F F2(option\255name) 3.053 E F0 3.053(,t)C .553(he v)-3.053 F .552 (alues of the current options are printed.)-.25 F(If)5.552 E F1(+o)184 270 Q F0 1.071(is supplied with no)3.571 F F2(option\255name)3.571 E F0 3.571(,as)C 1.071(eries of)-3.571 F F1(set)3.572 E F0 1.072 (commands to recreate the current)3.572 F (option settings is displayed on the standard output.)184 282 Q F1 144 294 Q F0 -.45(Tu)184 294 S 1.072(rn on).45 F F2(privile)4.822 E -.1 (ge)-.4 G(d).1 E F0 3.572(mode. In)4.342 F 1.072(this mode, the)3.572 F F3($ENV)3.572 E F0(and)3.322 E F3($B)3.572 E(ASH_ENV)-.27 E F0 1.071 (\214les are not pro-)3.322 F 1.5 (cessed, shell functions are not inherited from the en)184 306 R 1.501 (vironment, and the)-.4 F F3(SHELLOPTS)4.001 E/F4 9/Times-Roman@0 SF(,)A F3 -.27(BA)184 318 S(SHOPTS).27 E F4(,)A F3(CDP)2.775 E -.855(AT)-.666 G (H).855 E F4(,)A F0(and)2.775 E F3(GLOBIGNORE)3.025 E F0 -.25(va)2.775 G .524(riables, if the).25 F 3.024(ya)-.15 G .524(ppear in the en)-3.024 F (vironment,)-.4 E .379(are ignored.)184 330 R .379 (If the shell is started with the ef)5.379 F(fecti)-.25 E .679 -.15 (ve u)-.25 H .38(ser \(group\) id not equal to the real).15 F .462 (user \(group\) id, and the)184 342 R F12.961 E F0 .461 (option is not supplied, these actions are tak)2.961 F .461 (en and the ef)-.1 F(fec-)-.25 E(ti)184 354 Q .694 -.15(ve u)-.25 H .394 (ser id is set to the real user id.).15 F .395(If the)5.395 F F1 2.895 E F0 .395(option is supplied at startup, the ef)2.895 F(fecti)-.25 E -.15(ve)-.25 G .387(user id is not reset.)184 366 R -.45(Tu)5.387 G .387(rning this option of).45 F 2.886(fc)-.25 G .386(auses the ef)-2.886 F(fecti)-.25 E .686 -.15(ve u)-.25 H .386(ser and group ids to be).15 F (set to the real user and group ids.)184 378 Q F1144 390 Q F0 (Exit after reading and e)184 390 Q -.15(xe)-.15 G(cuting one command.) .15 E F1144 402 Q F0 -.35(Tr)184 402 S .043(eat unset v).35 F .044 (ariables and parameters other than the special parameters "@" and "*" \ as an)-.25 F .183(error when performing parameter e)184 414 R 2.683 (xpansion. If)-.15 F -.15(ex)2.683 G .182 (pansion is attempted on an unset v).15 F(ari-)-.25 E .746 (able or parameter)184 426 R 3.246(,t)-.4 G .746 (he shell prints an error message, and, if not interacti)-3.246 F -.15 (ve)-.25 G 3.246(,e).15 G .746(xits with a)-3.396 F(non-zero status.)184 438 Q F1144 450 Q F0(Print shell input lines as the)184 450 Q 2.5 (ya)-.15 G(re read.)-2.5 E F1144 462 Q F0 .315(After e)184 462 R .315(xpanding each)-.15 F F2 .315(simple command)2.815 F F0(,)A F1 -.25 (fo)2.815 G(r).25 E F0(command,)2.815 E F1(case)2.815 E F0(command,) 2.815 E F1(select)2.815 E F0(command,)2.815 E 1.235(or arithmetic)184 474 R F1 -.25(fo)3.736 G(r).25 E F0 1.236(command, display the e)3.736 F 1.236(xpanded v)-.15 F 1.236(alue of)-.25 F F3(PS4)3.736 E F4(,)A F0 (follo)3.486 E 1.236(wed by the com-)-.25 F(mand and its e)184 486 Q (xpanded ar)-.15 E(guments or associated w)-.18 E(ord list.)-.1 E F1 144 498 Q F0 1.206(The shell performs brace e)184 498 R 1.206 (xpansion \(see)-.15 F F1 1.205(Brace Expansion)3.705 F F0(abo)3.705 E -.15(ve)-.15 G 3.705(\). This).15 F 1.205(is on by de-)3.705 F -.1(fa) 184 510 S(ult.).1 E F1144 522 Q F0 .213(If set,)184 522 R F1(bash) 2.713 E F0 .213(does not o)2.713 F -.15(ve)-.15 G .214(rwrite an e).15 F .214(xisting \214le with the)-.15 F F1(>)2.714 E F0(,)A F1(>&)2.714 E F0 2.714(,a)C(nd)-2.714 E F1(<>)2.714 E F0 .214(redirection opera-)2.714 F 3.054(tors. This)184 534 R .553(may be o)3.053 F -.15(ve)-.15 G .553 (rridden when creating output \214les by using the redirection opera-) .15 F(tor)184 546 Q F1(>|)2.5 E F0(instead of)2.5 E F1(>)2.5 E F0(.)A F1 144 558 Q F0 .103(If set, an)184 558 R 2.603(yt)-.15 G .103 (rap on)-2.603 F F1(ERR)2.603 E F0 .104 (is inherited by shell functions, command substitutions, and com-)2.603 F .839(mands e)184 570 R -.15(xe)-.15 G .839(cuted in a subshell en).15 F 3.339(vironment. The)-.4 F F1(ERR)3.338 E F0 .838 (trap is normally not inherited in)3.338 F(such cases.)184 582 Q F1 144 594 Q F0(Enable)184 594 Q F1(!)3.031 E F0 .531 (style history substitution.)5.531 F .531(This option is on by def)5.531 F .532(ault when the shell is inter)-.1 F(-)-.2 E(acti)184 606 Q -.15 (ve)-.25 G(.).15 E F1144 618 Q F0 .96 (If set, the shell does not resolv)184 618 R 3.459(es)-.15 G .959 (ymbolic links when e)-3.459 F -.15(xe)-.15 G .959 (cuting commands such as).15 F F1(cd)3.459 E F0 1.452 (that change the current w)184 630 R 1.452(orking directory)-.1 F 6.452 (.I)-.65 G 3.953(tu)-6.452 G 1.453(ses the ph)-3.953 F 1.453 (ysical directory structure in-)-.05 F 3.335(stead. By)184 642 R(def) 3.335 E(ault,)-.1 E F1(bash)3.334 E F0(follo)3.334 E .834 (ws the logical chain of directories when performing com-)-.25 F (mands which change the current directory)184 654 Q(.)-.65 E F1144 666 Q F0 .89(If set, an)184 666 R 3.39(yt)-.15 G .89(raps on)-3.39 F F1 (DEB)3.39 E(UG)-.1 E F0(and)3.39 E F1(RETURN)3.39 E F0 .89 (are inherited by shell functions, command)3.39 F 1.932 (substitutions, and commands e)184 678 R -.15(xe)-.15 G 1.932 (cuted in a subshell en).15 F 4.432(vironment. The)-.4 F F1(DEB)4.432 E (UG)-.1 E F0(and)4.432 E F1(RETURN)184 690 Q F0 (traps are normally not inherited in such cases.)2.5 E F1144 702 Q F0 .4(If no ar)184 702 R .401(guments follo)-.18 F 2.901(wt)-.25 G .401 (his option, then the positional parameters are unset.)-2.901 F (Otherwise,)5.401 E(the positional parameters are set to the)184 714 Q F2(ar)2.5 E(g)-.37 E F0(s, e)A -.15(ve)-.25 G 2.5(ni).15 G 2.5(fs)-2.5 G (ome of them be)-2.5 E(gin with a)-.15 E F12.5 E F0(.)A (GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(72)190.395 E 0 Cg EP %%Page: 73 73 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10/Times-Bold@0 SF144 84 Q F0 .797(Signal the end of options, cause all remaining) 184 84 R/F2 10/Times-Italic@0 SF(ar)3.297 E(g)-.37 E F0 3.297(st)C 3.297 (ob)-3.297 G 3.296(ea)-3.297 G .796(ssigned to the positional pa-)-3.296 F 3.021(rameters. The)184 96 R F13.021 E F0(and)3.022 E F1 3.022 E F0 .522(options are turned of)3.022 F 3.022(f. If)-.25 F .522 (there are no)3.022 F F2(ar)3.022 E(g)-.37 E F0 .522 (s, the positional pa-)B(rameters remain unchanged.)184 108 Q .425 (The options are of)144 124.8 R 2.925(fb)-.25 G 2.925(yd)-2.925 G(ef) -2.925 E .425(ault unless otherwise noted.)-.1 F .425 (Using + rather than \255 causes these options)5.425 F .177 (to be turned of)144 136.8 R 2.677(f. The)-.25 F .178 (options can also be speci\214ed as ar)2.678 F .178(guments to an in) -.18 F -.2(vo)-.4 G .178(cation of the shell.).2 F(The)5.178 E .066 (current set of options may be found in)144 148.8 R F1<24ad>2.566 E F0 5.066(.T)C .066(he return status is al)-5.066 F -.1(wa)-.1 G .066 (ys true unless an in).1 F -.25(va)-.4 G .066(lid option).25 F (is encountered.)144 160.8 Q F1(shift)108 177.6 Q F0([)2.5 E F2(n)A F0 (])A .428(The positional parameters from)144 189.6 R F2(n)2.928 E F0 .429(+1 ... are renamed to)B F1 .429($1 ....)2.929 F F0 -.15(Pa)5.429 G .429(rameters represented by the num-).15 F(bers)144 201.6 Q F1($#)2.583 E F0(do)2.583 E .083(wn to)-.25 F F1($#)2.583 E F0A F2(n)A F0 .083 (+1 are unset.)B F2(n)5.443 E F0 .083(must be a non-ne)2.823 F -.05(ga) -.15 G(ti).05 E .382 -.15(ve n)-.25 H .082(umber less than or equal to) .15 F F1($#)2.582 E F0 5.082(.I)C(f)-5.082 E F2(n)2.942 E F0 .06 (is 0, no parameters are changed.)144 213.6 R(If)5.06 E F2(n)2.92 E F0 .06(is not gi)2.8 F -.15(ve)-.25 G .06(n, it is assumed to be 1.).15 F (If)5.06 E F2(n)2.92 E F0 .06(is greater than)2.8 F F1($#)2.56 E F0 2.56 (,t)C(he)-2.56 E .144(positional parameters are not changed.)144 225.6 R .144(The return status is greater than zero if)5.144 F F2(n)3.003 E F0 .143(is greater than)2.883 F F1($#)2.643 E F0 (or less than zero; otherwise 0.)144 237.6 Q F1(shopt)108 254.4 Q F0([) 2.5 E F1(\255pqsu)A F0 2.5(][)C F1-2.5 E F0 2.5(][)C F2(optname) -2.5 E F0(...])2.5 E -.8(To)144 266.4 S .639(ggle the v).8 F .639 (alues of settings controlling optional shell beha)-.25 F(vior)-.2 E 5.639(.T)-.55 G .64(he settings can be either those)-5.639 F .375 (listed belo)144 278.4 R 1.675 -.65(w, o)-.25 H 1.175 -.4(r, i).65 H 2.875(ft).4 G(he)-2.875 E F12.875 E F0 .375 (option is used, those a)2.875 F -.25(va)-.2 G .375(ilable with the).25 F F12.875 E F0 .374(option to the)2.875 F F1(set)2.874 E F0 -.2 (bu)2.874 G .374(iltin com-).2 F 2.565(mand. W)144 290.4 R .065 (ith no options, or with the)-.4 F F12.566 E F0 .066 (option, a list of all settable options is displayed, with an in-)2.566 F .074(dication of whether or not each is set; if)144 302.4 R F2 (optnames)2.574 E F0 .074 (are supplied, the output is restricted to those op-)2.574 F 3.105 (tions. The)144 314.4 R F13.105 E F0 .605(option causes output to\ be displayed in a form that may be reused as input.)3.105 F(Other)5.605 E(options ha)144 326.4 Q .3 -.15(ve t)-.2 H(he follo).15 E (wing meanings:)-.25 E F1144 338.4 Q F0(Enable \(set\) each)180 338.4 Q F2(optname)2.5 E F0(.)A F1144 350.4 Q F0 (Disable \(unset\) each)180 350.4 Q F2(optname)2.5 E F0(.)A F1144 362.4 Q F0 .003(Suppresses normal output \(quiet mode\); the return sta\ tus indicates whether the)180 362.4 R F2(optname)2.503 E F0(is)2.503 E .255(set or unset.)180 374.4 R .255(If multiple)5.255 F F2(optname)2.755 E F0(ar)2.755 E .256(guments are gi)-.18 F -.15(ve)-.25 G 2.756(nw).15 G (ith)-2.756 E F12.756 E F0 2.756(,t)C .256 (he return status is zero if)-2.756 F(all)180 386.4 Q F2(optnames)2.5 E F0(are enabled; non-zero otherwise.)2.5 E F1144 398.4 Q F0 (Restricts the v)180 398.4 Q(alues of)-.25 E F2(optname)2.5 E F0 (to be those de\214ned for the)2.5 E F12.5 E F0(option to the)2.5 E F1(set)2.5 E F0 -.2(bu)2.5 G(iltin.).2 E .625(If either)144 415.2 R F1 3.125 E F0(or)3.124 E F13.124 E F0 .624(is used with no) 3.124 F F2(optname)3.124 E F0(ar)3.124 E(guments,)-.18 E F1(shopt)3.124 E F0(sho)3.124 E .624(ws only those options which are)-.25 F .983 (set or unset, respecti)144 427.2 R -.15(ve)-.25 G(ly).15 E 5.983(.U) -.65 G .983(nless otherwise noted, the)-5.983 F F1(shopt)3.484 E F0 .984 (options are disabled \(unset\) by de-)3.484 F -.1(fa)144 439.2 S(ult.) .1 E 1.544(The return status when listing options is zero if all)144 456 R F2(optnames)4.044 E F0 1.544(are enabled, non-zero otherwise.)4.044 F .696 (When setting or unsetting options, the return status is zero unless an) 144 468 R F2(optname)3.196 E F0 .696(is not a v)3.196 F .696(alid shell) -.25 F(option.)144 480 Q(The list of)144 496.8 Q F1(shopt)2.5 E F0 (options is:)2.5 E F1(assoc_expand_once)144 514.8 Q F0 1.945 (If set, the shell suppresses multiple e)184 526.8 R -.25(va)-.25 G 1.944(luation of associati).25 F 2.244 -.15(ve a)-.25 H 1.944 (rray subscripts during).15 F .885(arithmetic e)184 538.8 R .885 (xpression e)-.15 F -.25(va)-.25 G .885(luation, while e).25 F -.15(xe) -.15 G .885(cuting b).15 F .885(uiltins that can perform v)-.2 F .885 (ariable as-)-.25 F(signments, and while e)184 550.8 Q -.15(xe)-.15 G (cuting b).15 E(uiltins that perform array dereferencing.)-.2 E F1 (autocd)144 562.8 Q F0 .2 (If set, a command name that is the name of a directory is e)184 562.8 R -.15(xe)-.15 G .199(cuted as if it were the ar).15 F(gu-)-.18 E (ment to the)184 574.8 Q F1(cd)2.5 E F0 2.5(command. This)2.5 F (option is only used by interacti)2.5 E .3 -.15(ve s)-.25 H(hells.).15 E F1(cdable_v)144 586.8 Q(ars)-.1 E F0 .155(If set, an ar)184 598.8 R .155 (gument to the)-.18 F F1(cd)2.655 E F0 -.2(bu)2.655 G .156 (iltin command that is not a directory is assumed to be the).2 F (name of a v)184 610.8 Q(ariable whose v)-.25 E (alue is the directory to change to.)-.25 E F1(cdspell)144 622.8 Q F0 1.055 (If set, minor errors in the spelling of a directory component in a)184 622.8 R F1(cd)3.555 E F0 1.055(command will be)3.555 F 3.987 (corrected. The)184 634.8 R 1.487(errors check)3.987 F 1.487 (ed for are transposed characters, a missing character)-.1 F 3.988(,a) -.4 G(nd)-3.988 E .77(one character too man)184 646.8 R 4.57 -.65(y. I) -.15 H 3.27(fac).65 G .77 (orrection is found, the corrected \214lename is printed, and)-3.27 F (the command proceeds.)184 658.8 Q (This option is only used by interacti)5 E .3 -.15(ve s)-.25 H(hells.) .15 E F1(checkhash)144 670.8 Q F0 .736(If set,)184 682.8 R F1(bash)3.236 E F0 .736(checks that a command found in the hash table e)3.236 F .737 (xists before trying to e)-.15 F -.15(xe)-.15 G(-).15 E(cute it.)184 694.8 Q(If a hashed command no longer e)5 E (xists, a normal path search is performed.)-.15 E F1(checkjobs)144 706.8 Q F0 .449(If set,)184 718.8 R F1(bash)2.949 E F0 .449 (lists the status of an)2.949 F 2.949(ys)-.15 G .448 (topped and running jobs before e)-2.949 F .448(xiting an interacti)-.15 F -.15(ve)-.25 G 3.438(shell. If)184 730.8 R(an)3.438 E 3.438(yj)-.15 G .938(obs are running, this causes the e)-3.438 F .938 (xit to be deferred until a second e)-.15 F .939(xit is)-.15 F (GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(73)190.395 E 0 Cg EP %%Page: 74 74 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E .817 (attempted without an interv)184 84 R .817(ening command \(see)-.15 F/F1 9/Times-Bold@0 SF .816(JOB CONTR)3.316 F(OL)-.27 E F0(abo)3.066 E -.15 (ve)-.15 G 3.316(\). The).15 F .816(shell al-)3.316 F -.1(wa)184 96 S (ys postpones e).1 E(xiting if an)-.15 E 2.5(yj)-.15 G(obs are stopped.) -2.5 E/F2 10/Times-Bold@0 SF(checkwinsize)144 108 Q F0 1.09(If set,)184 120 R F2(bash)3.59 E F0 1.09(checks the windo)3.59 F 3.59(ws)-.25 G 1.09 (ize after each e)-3.59 F 1.09(xternal \(non-b)-.15 F 1.09 (uiltin\) command and, if)-.2 F(necessary)184 132 Q 3.351(,u)-.65 G .851 (pdates the v)-3.351 F .85(alues of)-.25 F F1(LINES)3.35 E F0(and)3.1 E F1(COLUMNS)3.35 E/F3 9/Times-Roman@0 SF(.)A F0 .85 (This option is enabled by de-)5.35 F -.1(fa)184 144 S(ult.).1 E F2 (cmdhist)144 156 Q F0 .172(If set,)184 156 R F2(bash)2.672 E F0 .172 (attempts to sa)2.672 F .472 -.15(ve a)-.2 H .173 (ll lines of a multiple-line command in the same history en-).15 F(try) 184 168 Q 5.597(.T)-.65 G .597(his allo)-5.597 F .597 (ws easy re-editing of multi-line commands.)-.25 F .597 (This option is enabled by de-)5.597 F -.1(fa)184 180 S 1.287(ult, b).1 F 1.288(ut only has an ef)-.2 F 1.288 (fect if command history is enabled, as described abo)-.25 F 1.588 -.15 (ve u)-.15 H(nder).15 E F1(HIST)184 192 Q(OR)-.162 E(Y)-.315 E F3(.)A F2 (compat31)144 204 Q(compat32)144 216 Q(compat40)144 228 Q(compat41)144 240 Q(compat42)144 252 Q(compat43)144 264 Q(compat44)144 276 Q F0 .889 (These control aspects of the shell')184 288 R 3.389(sc)-.55 G .889 (ompatibility mode \(see)-3.389 F F1 .889(SHELL COMP)3.389 F -.855(AT) -.666 G(IBILITY).855 E(MODE)184 300 Q F0(belo)2.25 E(w\).)-.25 E F2 (complete_fullquote)144 316.8 Q F0 .653(If set,)184 328.8 R F2(bash) 3.153 E F0 .653(quotes all shell metacharacters in \214lenames and dire\ ctory names when per)3.153 F(-)-.2 E 1.525(forming completion.)184 340.8 R 1.524(If not set,)6.525 F F2(bash)4.024 E F0(remo)4.024 E -.15(ve)-.15 G 4.024(sm).15 G 1.524(etacharacters such as the dollar sign)-4.024 F 2.667(from the set of characters that will be quoted in completed \214l\ enames when these)184 352.8 R .029(metacharacters appear in shell v)184 364.8 R .028(ariable references in w)-.25 F .028(ords to be completed.) -.1 F .028(This means)5.028 F 1.072(that dollar signs in v)184 376.8 R 1.073(ariable names that e)-.25 F 1.073 (xpand to directories will not be quoted; ho)-.15 F(w-)-.25 E -2.15 -.25 (ev e)184 388.8 T 1.923 -.4(r, a).25 H 1.423 -.15(ny d).4 H 1.123 (ollar signs appearing in \214lenames will not be quoted, either).15 F 6.123(.T)-.55 G 1.122(his is acti)-6.123 F -.15(ve)-.25 G .59 (only when bash is using backslashes to quote completed \214lenames.)184 400.8 R .59(This v)5.59 F .59(ariable is set)-.25 F(by def)184 412.8 Q (ault, which is the def)-.1 E(ault bash beha)-.1 E(vior in v)-.2 E (ersions through 4.2.)-.15 E F2(dir)144 429.6 Q(expand)-.18 E F0 .487 (If set,)184 441.6 R F2(bash)2.987 E F0 .486 (replaces directory names with the results of w)2.986 F .486(ord e)-.1 F .486(xpansion when perform-)-.15 F .179(ing \214lename completion.)184 453.6 R .179(This changes the contents of the readline editing b)5.179 F (uf)-.2 E(fer)-.25 E 5.18(.I)-.55 G 2.68(fn)-5.18 G(ot)-2.68 E(set,)184 465.6 Q F2(bash)2.5 E F0(attempts to preserv)2.5 E 2.5(ew)-.15 G (hat the user typed.)-2.5 E F2(dirspell)144 482.4 Q F0 .859(If set,)184 482.4 R F2(bash)3.359 E F0 .858 (attempts spelling correction on directory names during w)3.359 F .858 (ord completion if)-.1 F (the directory name initially supplied does not e)184 494.4 Q(xist.)-.15 E F2(dotglob)144 511.2 Q F0 .165(If set,)184 511.2 R F2(bash)2.665 E F0 .165(includes \214lenames be)2.665 F .165(ginning with a `.)-.15 F 2.665 ('i)-.7 G 2.665(nt)-2.665 G .165(he results of pathname e)-2.665 F (xpansion.)-.15 E(The \214lenames)184 523.2 Q F2 -.63(``)2.5 G -.55(.') .63 G(')-.08 E F0(and)5 E F2 -.63(``)2.5 G(..).63 E -.63('')-.55 G F0 (must al)5.63 E -.1(wa)-.1 G(ys be matched e).1 E(xplicitly)-.15 E 2.5 (,e)-.65 G -.15(ve)-2.75 G 2.5(ni).15 G(f)-2.5 E F2(dotglob)2.5 E F0 (is set.)2.5 E F2(execfail)144 540 Q F0 .517(If set, a non-interacti)184 540 R .817 -.15(ve s)-.25 H .517(hell will not e).15 F .516 (xit if it cannot e)-.15 F -.15(xe)-.15 G .516 (cute the \214le speci\214ed as an ar).15 F(-)-.2 E(gument to the)184 552 Q F2(exec)2.5 E F0 -.2(bu)2.5 G(iltin command.).2 E(An interacti)5 E .3 -.15(ve s)-.25 H(hell does not e).15 E(xit if)-.15 E F2(exec)2.5 E F0 -.1(fa)2.5 G(ils.).1 E F2(expand_aliases)144 568.8 Q F0 .716 (If set, aliases are e)184 580.8 R .717(xpanded as described abo)-.15 F 1.017 -.15(ve u)-.15 H(nder).15 E F1(ALIASES)3.217 E F3(.)A F0 .717 (This option is enabled)5.217 F(by def)184 592.8 Q(ault for interacti) -.1 E .3 -.15(ve s)-.25 H(hells.).15 E F2(extdeb)144 609.6 Q(ug)-.2 E F0 .17(If set at shell in)184 621.6 R -.2(vo)-.4 G .17 (cation, or in a shell startup \214le, arrange to e).2 F -.15(xe)-.15 G .17(cute the deb).15 F .17(ugger pro\214le)-.2 F 1.081 (before the shell starts, identical to the)184 633.6 R F2 3.582 E(ugger)-.2 E F0 3.582(option. If)3.582 F 1.082(set after in)3.582 F -.2(vo)-.4 G 1.082(cation, be-).2 F(ha)184 645.6 Q (vior intended for use by deb)-.2 E(uggers is enabled:)-.2 E F2(1.)184 662.4 Q F0(The)220 662.4 Q F24.251 E F0 1.751(option to the)4.251 F F2(declar)4.251 E(e)-.18 E F0 -.2(bu)4.251 G 1.751 (iltin displays the source \214le name and line).2 F (number corresponding to each function name supplied as an ar)220 674.4 Q(gument.)-.18 E F2(2.)184 691.2 Q F0 1.667(If the command run by the) 220 691.2 R F2(DEB)4.167 E(UG)-.1 E F0 1.667(trap returns a non-zero v) 4.167 F 1.667(alue, the ne)-.25 F(xt)-.15 E (command is skipped and not e)220 703.2 Q -.15(xe)-.15 G(cuted.).15 E (GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(74)190.395 E 0 Cg EP %%Page: 75 75 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10/Times-Bold@0 SF(3.)184 84 Q F0 .841(If the command run by the)220 84 R F1(DEB)3.341 E (UG)-.1 E F0 .841(trap returns a v)3.341 F .84 (alue of 2, and the shell is)-.25 F -.15(exe)220 96 S .488 (cuting in a subroutine \(a shell function or a shell script e).15 F -.15(xe)-.15 G .488(cuted by the).15 F F1(.)2.988 E F0(or)2.988 E F1 (sour)220 108 Q(ce)-.18 E F0 -.2(bu)2.5 G (iltins\), the shell simulates a call to).2 E F1 -.18(re)2.5 G(tur).18 E (n)-.15 E F0(.)A F1(4.)184 124.8 Q/F2 9/Times-Bold@0 SF -.27(BA)220 124.8 S(SH_ARGC).27 E F0(and)3.154 E F2 -.27(BA)3.404 G(SH_ARGV).27 E F0 .904(are updated as described in their descriptions)3.154 F(abo)220 136.8 Q -.15(ve)-.15 G(.).15 E F1(5.)184 153.6 Q F0 1.637(Function trac\ ing is enabled: command substitution, shell functions, and sub-)220 153.6 R(shells in)220 165.6 Q -.2(vo)-.4 G -.1(ke).2 G 2.5(dw).1 G(ith) -2.5 E F1(\()2.5 E/F3 10/Times-Italic@0 SF(command)2.5 E F1(\))2.5 E F0 (inherit the)2.5 E F1(DEB)2.5 E(UG)-.1 E F0(and)2.5 E F1(RETURN)2.5 E F0 (traps.)2.5 E F1(6.)184 182.4 Q F0 1.082(Error tracing is enabled: comm\ and substitution, shell functions, and subshells)220 182.4 R(in)220 194.4 Q -.2(vo)-.4 G -.1(ke).2 G 2.5(dw).1 G(ith)-2.5 E F1(\()2.5 E F3 (command)2.5 E F1(\))2.5 E F0(inherit the)2.5 E F1(ERR)2.5 E F0(trap.) 2.5 E F1(extglob)144 211.2 Q F0 .4(If set, the e)184 211.2 R .4 (xtended pattern matching features described abo)-.15 F .7 -.15(ve u) -.15 H(nder).15 E F1 -.1(Pa)2.9 G .4(thname Expan-).1 F(sion)184 223.2 Q F0(are enabled.)2.5 E F1(extquote)144 240 Q F0 .86(If set,)184 252 R F1 ($)3.36 E F0<08>A F3(string)A F0 3.36<0861>C(nd)-3.36 E F1($)3.36 E F0 (")A F3(string)A F0 3.36("q)C .86(uoting is performed within)-3.36 F F1 (${)3.36 E F3(par)A(ameter)-.15 E F1(})A F0 -.15(ex)3.36 G .86 (pansions en-).15 F(closed in double quotes.)184 264 Q (This option is enabled by def)5 E(ault.)-.1 E F1(failglob)144 280.8 Q F0 .242(If set, patterns which f)184 280.8 R .243 (ail to match \214lenames during pathname e)-.1 F .243 (xpansion result in an e)-.15 F(x-)-.15 E(pansion error)184 292.8 Q(.) -.55 E F1 -.25(fo)144 309.6 S -.18(rc).25 G(e_\214gnor).18 E(e)-.18 E F0 .937(If set, the suf)184 321.6 R<8c78>-.25 E .936(es speci\214ed by the) -.15 F F2(FIGNORE)3.436 E F0 .936(shell v)3.186 F .936(ariable cause w) -.25 F .936(ords to be ignored)-.1 F .32(when performing w)184 333.6 R .32(ord completion e)-.1 F -.15(ve)-.25 G 2.82(ni).15 G 2.82(ft)-2.82 G .32(he ignored w)-2.82 F .32(ords are the only possible com-)-.1 F 2.948 (pletions. See)184 345.6 R F2 .448(SHELL V)2.948 F(ARIABLES)-1.215 E F0 (abo)2.698 E .748 -.15(ve f)-.15 H .448(or a description of).15 F F2 (FIGNORE)2.947 E/F4 9/Times-Roman@0 SF(.)A F0 .447(This option is)4.947 F(enabled by def)184 357.6 Q(ault.)-.1 E F1(globasciiranges)144 374.4 Q F0 2.518(If set, range e)184 386.4 R 2.519 (xpressions used in pattern matching brack)-.15 F 2.519(et e)-.1 F 2.519 (xpressions \(see)-.15 F F2 -.09(Pa)5.019 G(tter).09 E(n)-.135 E (Matching)184 398.4 Q F0(abo)2.965 E -.15(ve)-.15 G 3.215(\)b).15 G(eha) -3.215 E 1.015 -.15(ve a)-.2 H 3.214(si).15 G 3.214(fi)-3.214 G 3.214 (nt)-3.214 G .714(he traditional C locale when performing comparisons.) -3.214 F 1.02(That is, the current locale')184 410.4 R 3.52(sc)-.55 G 1.02(ollating sequence is not tak)-3.52 F 1.02(en into account, so)-.1 F F1(b)3.52 E F0 1.02(will not)3.52 F .957(collate between)184 422.4 R F1 (A)3.457 E F0(and)3.457 E F1(B)3.457 E F0 3.457(,a)C .957(nd upper) -3.457 F .957(-case and lo)-.2 F(wer)-.25 E .956 (-case ASCII characters will collate)-.2 F(together)184 434.4 Q(.)-.55 E F1(globstar)144 451.2 Q F0 .518(If set, the pattern)184 451.2 R F1(**) 3.018 E F0 .519(used in a pathname e)3.019 F .519(xpansion conte)-.15 F .519(xt will match all \214les and zero)-.15 F .432 (or more directories and subdirectories.)184 463.2 R .431 (If the pattern is follo)5.432 F .431(wed by a)-.25 F F1(/)2.931 E F0 2.931(,o)C .431(nly directories)-2.931 F(and subdirectories match.)184 475.2 Q F1(gnu_errfmt)144 492 Q F0(If set, shell error messages are wri\ tten in the standard GNU error message format.)184 504 Q F1(histappend) 144 520.8 Q F0 .676 (If set, the history list is appended to the \214le named by the v)184 532.8 R .676(alue of the)-.25 F F2(HISTFILE)3.177 E F0 -.25(va)2.927 G (ri-).25 E(able when the shell e)184 544.8 Q(xits, rather than o)-.15 E -.15(ve)-.15 G(rwriting the \214le.).15 E F1(histr)144 561.6 Q(eedit) -.18 E F0 .576(If set, and)184 573.6 R F1 -.18(re)3.076 G(adline).18 E F0 .575(is being used, a user is gi)3.076 F -.15(ve)-.25 G 3.075(nt).15 G .575(he opportunity to re-edit a f)-3.075 F .575(ailed his-)-.1 F (tory substitution.)184 585.6 Q F1(histv)144 602.4 Q(erify)-.1 E F0 .402 (If set, and)184 614.4 R F1 -.18(re)2.903 G(adline).18 E F0 .403 (is being used, the results of history substitution are not immediately) 2.903 F .662(passed to the shell parser)184 626.4 R 5.662(.I)-.55 G .661 (nstead, the resulting line is loaded into the)-5.662 F F1 -.18(re)3.161 G(adline).18 E F0(editing)3.161 E -.2(bu)184 638.4 S -.25(ff).2 G(er).25 E 2.5(,a)-.4 G(llo)-2.5 E(wing further modi\214cation.)-.25 E F1 (hostcomplete)144 655.2 Q F0 1.181(If set, and)184 667.2 R F1 -.18(re) 3.681 G(adline).18 E F0 1.181(is being used,)3.681 F F1(bash)3.682 E F0 1.182(will attempt to perform hostname completion)3.682 F 1.381 (when a w)184 679.2 R 1.381(ord containing a)-.1 F F1(@)3.881 E F0 1.381 (is being completed \(see)3.881 F F1(Completing)3.88 E F0(under)3.88 E F2(READLINE)3.88 E F0(abo)184 691.2 Q -.15(ve)-.15 G 2.5(\). This).15 F (is enabled by def)2.5 E(ault.)-.1 E(GNU Bash 5.1)72 768 Q (2020 October 29)141.235 E(75)190.395 E 0 Cg EP %%Page: 76 76 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10/Times-Bold@0 SF(huponexit)144 84 Q F0(If set,)184 96 Q F1(bash)2.5 E F0(will send)2.5 E/F2 9/Times-Bold@0 SF(SIGHUP)2.5 E F0(to all jobs when an interacti) 2.25 E .3 -.15(ve l)-.25 H(ogin shell e).15 E(xits.)-.15 E F1 (inherit_err)144 112.8 Q(exit)-.18 E F0 .219 (If set, command substitution inherits the v)184 124.8 R .219 (alue of the)-.25 F F1(err)2.719 E(exit)-.18 E F0 .22 (option, instead of unsetting)2.719 F(it in the subshell en)184 136.8 Q 2.5(vironment. This)-.4 F(option is enabled when)2.5 E/F3 10 /Times-Italic@0 SF(posix mode)2.5 E F0(is enabled.)2.5 E F1(interacti) 144 153.6 Q -.1(ve)-.1 G(_comments).1 E F0 .33(If set, allo)184 165.6 R 2.83(waw)-.25 G .33(ord be)-2.93 F .33(ginning with)-.15 F F1(#)2.83 E F0 .33(to cause that w)2.83 F .33(ord and all remaining characters on) -.1 F .967(that line to be ignored in an interacti)184 177.6 R 1.267 -.15(ve s)-.25 H .967(hell \(see).15 F F2(COMMENTS)3.467 E F0(abo)3.217 E -.15(ve)-.15 G 3.467(\). This).15 F .968(option is)3.468 F (enabled by def)184 189.6 Q(ault.)-.1 E F1(lastpipe)144 206.4 Q F0 .066 (If set, and job control is not acti)184 206.4 R -.15(ve)-.25 G 2.566 (,t).15 G .066(he shell runs the last command of a pipeline not e)-2.566 F -.15(xe)-.15 G(-).15 E (cuted in the background in the current shell en)184 218.4 Q(vironment.) -.4 E F1(lithist)144 235.2 Q F0 .654(If set, and the)184 235.2 R F1 (cmdhist)3.154 E F0 .654(option is enabled, multi-line commands are sa) 3.154 F -.15(ve)-.2 G 3.155(dt).15 G 3.155(ot)-3.155 G .655(he history) -3.155 F(with embedded ne)184 247.2 Q (wlines rather than using semicolon separators where possible.)-.25 E F1 (localv)144 264 Q(ar_inherit)-.1 E F0 .422(If set, local v)184 276 R .422(ariables inherit the v)-.25 F .422(alue and attrib)-.25 F .422 (utes of a v)-.2 F .422(ariable of the same name that)-.25 F -.15(ex)184 288 S .173(ists at a pre).15 F .173(vious scope before an)-.25 F 2.673 (yn)-.15 G .673 -.25(ew va)-2.673 H .173(lue is assigned.).25 F .174 (The nameref attrib)5.174 F .174(ute is not)-.2 F(inherited.)184 300 Q F1(localv)144 316.8 Q(ar_unset)-.1 E F0 .329(If set, calling)184 328.8 R F1(unset)2.829 E F0 .329(on local v)2.829 F .329(ariables in pre)-.25 F .328(vious function scopes marks them so subse-)-.25 F .543(quent looku\ ps \214nd them unset until that function returns. This is identical to \ the beha)184 340.8 R(v-)-.2 E(ior of unsetting local v)184 352.8 Q (ariables at the current function scope.)-.25 E F1(login_shell)144 369.6 Q F0 .486 (The shell sets this option if it is started as a login shell \(see)184 381.6 R F2(INV)2.986 E(OCA)-.405 E(TION)-.855 E F0(abo)2.736 E -.15(ve) -.15 G 2.986(\). The).15 F -.25(va)184 393.6 S(lue may not be changed.) .25 E F1(mailwar)144 410.4 Q(n)-.15 E F0 .814(If set, and a \214le that) 184 422.4 R F1(bash)3.314 E F0 .815 (is checking for mail has been accessed since the last time it)3.314 F -.1(wa)184 434.4 S 2.5(sc).1 G(heck)-2.5 E(ed, the message `)-.1 E (`The mail in)-.74 E F3(mail\214le)2.5 E F0(has been read')2.5 E 2.5('i) -.74 G 2.5(sd)-2.5 G(isplayed.)-2.5 E F1(no_empty_cmd_completion)144 451.2 Q F0 .325(If set, and)184 463.2 R F1 -.18(re)2.825 G(adline).18 E F0 .325(is being used,)2.825 F F1(bash)2.824 E F0 .324 (will not attempt to search the)2.824 F F2 -.666(PA)2.824 G(TH)-.189 E F0 .324(for possible)2.574 F (completions when completion is attempted on an empty line.)184 475.2 Q F1(nocaseglob)144 492 Q F0 .436(If set,)184 504 R F1(bash)2.936 E F0 .436(matches \214lenames in a case\255insensiti)2.936 F .737 -.15(ve f) -.25 H .437(ashion when performing pathname).05 F -.15(ex)184 516 S (pansion \(see).15 E F1 -.1(Pa)2.5 G(thname Expansion).1 E F0(abo)2.5 E -.15(ve)-.15 G(\).).15 E F1(nocasematch)144 532.8 Q F0 1.194(If set,)184 544.8 R F1(bash)3.694 E F0 1.194 (matches patterns in a case\255insensiti)3.694 F 1.493 -.15(ve f)-.25 H 1.193(ashion when performing matching).05 F .551(while e)184 556.8 R -.15(xe)-.15 G(cuting).15 E F1(case)3.051 E F0(or)3.051 E F1([[)3.051 E F0 .551(conditional commands, when performing pattern substitution)3.051 F -.1(wo)184 568.8 S .623(rd e).1 F .623(xpansions, or when \214ltering\ possible completions as part of programmable com-)-.15 F(pletion.)184 580.8 Q F1(nullglob)144 597.6 Q F0 .854(If set,)184 609.6 R F1(bash) 3.354 E F0(allo)3.354 E .855(ws patterns which match no \214les \(see) -.25 F F1 -.1(Pa)3.355 G .855(thname Expansion).1 F F0(abo)3.355 E -.15 (ve)-.15 G 3.355(\)t).15 G(o)-3.355 E -.15(ex)184 621.6 S (pand to a null string, rather than themselv).15 E(es.)-.15 E F1(pr)144 638.4 Q(ogcomp)-.18 E F0 .677(If set, the programmable completion f)184 650.4 R .677(acilities \(see)-.1 F F1(Pr)3.176 E .676 (ogrammable Completion)-.18 F F0(abo)3.176 E -.15(ve)-.15 G(\)).15 E (are enabled.)184 662.4 Q(This option is enabled by def)5 E(ault.)-.1 E F1(pr)144 679.2 Q(ogcomp_alias)-.18 E F0 2.124 (If set, and programmable completion is enabled,)184 691.2 R F1(bash) 4.624 E F0 2.124(treats a command name that)4.624 F(doesn')184 703.2 Q 3.289(th)-.18 G -2.25 -.2(av e)-3.289 H(an)3.489 E 3.289(yc)-.15 G .789 (ompletions as a possible alias and attempts alias e)-3.289 F .788 (xpansion. If it has)-.15 F 1.473(an alias,)184 715.2 R F1(bash)3.973 E F0 1.473(attempts programmable completion using the command w)3.973 F 1.473(ord resulting)-.1 F(from the e)184 727.2 Q(xpanded alias.)-.15 E (GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(76)190.395 E 0 Cg EP %%Page: 77 77 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10/Times-Bold@0 SF(pr)144 84 Q(omptv)-.18 E(ars)-.1 E F0 1.448 (If set, prompt strings under)184 96 R 1.448(go parameter e)-.18 F 1.447 (xpansion, command substitution, arithmetic)-.15 F -.15(ex)184 108 S .17 (pansion, and quote remo).15 F -.25(va)-.15 G 2.67(la).25 G .17 (fter being e)-2.67 F .17(xpanded as described in)-.15 F/F2 9 /Times-Bold@0 SF(PR)2.671 E(OMPTING)-.27 E F0(abo)2.421 E -.15(ve)-.15 G (.).15 E(This option is enabled by def)184 120 Q(ault.)-.1 E F1 -.18(re) 144 136.8 S(stricted_shell).18 E F0 1.069 (The shell sets this option if it is started in restricted mode \(see) 184 148.8 R F2 1.069(RESTRICTED SHELL)3.569 F F0(belo)184 160.8 Q 2.86 (w\). The)-.25 F -.25(va)2.86 G .36(lue may not be changed.).25 F .36 (This is not reset when the startup \214les are e)5.36 F -.15(xe)-.15 G (-).15 E(cuted, allo)184 172.8 Q(wing the startup \214les to disco)-.25 E -.15(ve)-.15 G 2.5(rw).15 G(hether or not a shell is restricted.)-2.5 E F1(shift_v)144 189.6 Q(erbose)-.1 E F0 .502(If set, the)184 201.6 R F1 (shift)3.002 E F0 -.2(bu)3.002 G .501 (iltin prints an error message when the shift count e).2 F .501 (xceeds the number)-.15 F(of positional parameters.)184 213.6 Q F1(sour) 144 230.4 Q(cepath)-.18 E F0 .77(If set, the)184 242.4 R F1(sour)3.27 E (ce)-.18 E F0(\()3.27 E F1(.)A F0 3.27(\)b)C .77(uiltin uses the v)-3.47 F .771(alue of)-.25 F F2 -.666(PA)3.271 G(TH)-.189 E F0 .771 (to \214nd the directory containing the)3.021 F (\214le supplied as an ar)184 254.4 Q 2.5(gument. This)-.18 F (option is enabled by def)2.5 E(ault.)-.1 E F1(xpg_echo)144 271.2 Q F0 (If set, the)184 283.2 Q F1(echo)2.5 E F0 -.2(bu)2.5 G(iltin e).2 E (xpands backslash-escape sequences by def)-.15 E(ault.)-.1 E F1(suspend) 108 300 Q F0([)2.5 E F1A F0(])A 1.002(Suspend the e)144 312 R -.15 (xe)-.15 G 1.002(cution of this shell until it recei).15 F -.15(ve)-.25 G 3.501(sa).15 G F2(SIGCONT)A F0 3.501(signal. A)3.251 F 1.001 (login shell cannot be)3.501 F .022(suspended; the)144 324 R F1 2.522 E F0 .022(option can be used to o)2.522 F -.15(ve)-.15 G .022 (rride this and force the suspension.).15 F .023(The return status is) 5.023 F 2.5(0u)144 336 S(nless the shell is a login shell and)-2.5 E F1 2.5 E F0(is not supplied, or if job control is not enabled.)2.5 E F1(test)108 352.8 Q/F3 10/Times-Italic@0 SF -.2(ex)2.5 G(pr).2 E F1([) 108 364.8 Q F3 -.2(ex)2.5 G(pr).2 E F1(])2.5 E F0 .878 (Return a status of 0 \(true\) or 1 \(f)144 364.8 R .877 (alse\) depending on the e)-.1 F -.25(va)-.25 G .877 (luation of the conditional e).25 F(xpression)-.15 E F3 -.2(ex)144 376.8 S(pr).2 E F0 5.53(.E).73 G .53 (ach operator and operand must be a separate ar)-5.53 F 3.03 (gument. Expressions)-.18 F .53(are composed of the)3.03 F 1.361 (primaries described abo)144 388.8 R 1.661 -.15(ve u)-.15 H(nder).15 E F2(CONDITION)3.861 E 1.36(AL EXPRESSIONS)-.18 F/F4 9/Times-Roman@0 SF(.) A F1(test)5.86 E F0 1.36(does not accept an)3.86 F 3.86(yo)-.15 G(p-) -3.86 E(tions, nor does it accept and ignore an ar)144 400.8 Q (gument of)-.18 E F12.5 E F0(as signifying the end of options.)2.5 E .785(Expressions may be combined using the follo)144 418.8 R .786 (wing operators, listed in decreasing order of prece-)-.25 F 3.412 (dence. The)144 430.8 R -.25(eva)3.412 G .912 (luation depends on the number of ar).25 F .911(guments; see belo)-.18 F 4.711 -.65(w. O)-.25 H .911(perator precedence is).65 F (used when there are \214v)144 442.8 Q 2.5(eo)-.15 G 2.5(rm)-2.5 G (ore ar)-2.5 E(guments.)-.18 E F1(!)144 454.8 Q F3 -.2(ex)2.5 G(pr).2 E F0 -.35(Tr)180 454.8 S(ue if).35 E F3 -.2(ex)2.5 G(pr).2 E F0(is f)3.23 E(alse.)-.1 E F1(\()144 466.8 Q F3 -.2(ex)2.5 G(pr).2 E F1(\))2.5 E F0 .26(Returns the v)180 466.8 R .26(alue of)-.25 F F3 -.2(ex)2.76 G(pr).2 E F0 5.26(.T)C .26(his may be used to o)-5.26 F -.15(ve)-.15 G .26 (rride the normal precedence of opera-).15 F(tors.)180 478.8 Q F3 -.2 (ex)144 490.8 S(pr1).2 E F02.5 E F1(a)A F3 -.2(ex)2.5 G(pr2).2 E F0 -.35(Tr)180 502.8 S(ue if both).35 E F3 -.2(ex)2.5 G(pr1).2 E F0(and)2.5 E F3 -.2(ex)2.5 G(pr2).2 E F0(are true.)2.52 E F3 -.2(ex)144 514.8 S (pr1).2 E F02.5 E F1(o)A F3 -.2(ex)2.5 G(pr2).2 E F0 -.35(Tr)180 526.8 S(ue if either).35 E F3 -.2(ex)2.5 G(pr1).2 E F0(or)2.5 E F3 -.2 (ex)2.5 G(pr2).2 E F0(is true.)2.52 E F1(test)144 543.6 Q F0(and)2.5 E F1([)2.5 E F0 -.25(eva)2.5 G(luate conditional e).25 E (xpressions using a set of rules based on the number of ar)-.15 E (guments.)-.18 E 2.5(0a)144 561.6 S -.18(rg)-2.5 G(uments).18 E(The e) 180 573.6 Q(xpression is f)-.15 E(alse.)-.1 E 2.5(1a)144 585.6 S -.18 (rg)-2.5 G(ument).18 E(The e)180 597.6 Q (xpression is true if and only if the ar)-.15 E(gument is not null.)-.18 E 2.5(2a)144 609.6 S -.18(rg)-2.5 G(uments).18 E .37(If the \214rst ar) 180 621.6 R .37(gument is)-.18 F F1(!)2.87 E F0 2.87(,t)C .37(he e)-2.87 F .37(xpression is true if and only if the second ar)-.15 F .37 (gument is null.)-.18 F .379(If the \214rst ar)180 633.6 R .38 (gument is one of the unary conditional operators listed abo)-.18 F .68 -.15(ve u)-.15 H(nder).15 E F2(CONDI-)2.88 E(TION)180 645.6 Q .553 (AL EXPRESSIONS)-.18 F F4(,)A F0 .552(the e)2.802 F .552 (xpression is true if the unary test is true.)-.15 F .552 (If the \214rst ar)5.552 F(gu-)-.18 E(ment is not a v)180 657.6 Q (alid unary conditional operator)-.25 E 2.5(,t)-.4 G(he e)-2.5 E (xpression is f)-.15 E(alse.)-.1 E 2.5(3a)144 669.6 S -.18(rg)-2.5 G (uments).18 E .236(The follo)180 681.6 R .236 (wing conditions are applied in the order listed.)-.25 F .236 (If the second ar)5.236 F .236(gument is one of)-.18 F .855 (the binary conditional operators listed abo)180 693.6 R 1.155 -.15 (ve u)-.15 H(nder).15 E F2(CONDITION)3.355 E .855(AL EXPRESSIONS)-.18 F F4(,)A F0(the)3.104 E .578(result of the e)180 705.6 R .578(xpression i\ s the result of the binary test using the \214rst and third ar)-.15 F (guments)-.18 E 1.333(as operands.)180 717.6 R(The)6.333 E F13.833 E F0(and)3.833 E F13.832 E F0 1.332 (operators are considered binary operators when there are)3.832 F .558 (three ar)180 729.6 R 3.058(guments. If)-.18 F .558(the \214rst ar)3.058 F .558(gument is)-.18 F F1(!)3.058 E F0 3.058(,t)C .558(he v)-3.058 F .558(alue is the ne)-.25 F -.05(ga)-.15 G .558(tion of the tw).05 F (o-ar)-.1 E(gument)-.18 E(GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(77)190.395 E 0 Cg EP %%Page: 78 78 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E .521 (test using the second and third ar)180 84 R 3.021(guments. If)-.18 F .521(the \214rst ar)3.021 F .52(gument is e)-.18 F(xactly)-.15 E/F1 10 /Times-Bold@0 SF(\()3.02 E F0 .52(and the third)3.02 F(ar)180 96 Q .485 (gument is e)-.18 F(xactly)-.15 E F1(\))2.985 E F0 2.985(,t)C .485 (he result is the one-ar)-2.985 F .485(gument test of the second ar)-.18 F 2.985(gument. Other)-.18 F(-)-.2 E(wise, the e)180 108 Q (xpression is f)-.15 E(alse.)-.1 E 2.5(4a)144 120 S -.18(rg)-2.5 G (uments).18 E .385(If the \214rst ar)180 132 R .385(gument is)-.18 F F1 (!)2.885 E F0 2.885(,t)C .385(he result is the ne)-2.885 F -.05(ga)-.15 G .384(tion of the three-ar).05 F .384(gument e)-.18 F .384 (xpression com-)-.15 F .284(posed of the remaining ar)180 144 R 2.784 (guments. Otherwise,)-.18 F .284(the e)2.784 F .284 (xpression is parsed and e)-.15 F -.25(va)-.25 G .285(luated ac-).25 F (cording to precedence using the rules listed abo)180 156 Q -.15(ve)-.15 G(.).15 E 2.5(5o)144 168 S 2.5(rm)-2.5 G(ore ar)-2.5 E(guments)-.18 E 1.635(The e)180 180 R 1.635(xpression is parsed and e)-.15 F -.25(va) -.25 G 1.635(luated according to precedence using the rules listed).25 F (abo)180 192 Q -.15(ve)-.15 G(.).15 E(When used with)144 210 Q F1(test) 2.5 E F0(or)2.5 E F1([)2.5 E F0 2.5(,t)C(he)-2.5 E F1(<)2.5 E F0(and)2.5 E F1(>)2.5 E F0(operators sort le)2.5 E (xicographically using ASCII ordering.)-.15 E F1(times)108 226.8 Q F0 1.229(Print the accumulated user and system times for the shell and for\ processes run from the shell.)144 226.8 R(The return status is 0.)144 238.8 Q F1(trap)108 255.6 Q F0([)2.5 E F1(\255lp)A F0 2.5(][)C([)-2.5 E /F2 10/Times-Italic@0 SF(ar)A(g)-.37 E F0(])A F2(sigspec)2.5 E F0(...]) 2.5 E .683(The command)144 267.6 R F2(ar)3.513 E(g)-.37 E F0 .683 (is to be read and e)3.403 F -.15(xe)-.15 G .682 (cuted when the shell recei).15 F -.15(ve)-.25 G 3.182(ss).15 G (ignal\(s\))-3.182 E F2(sigspec)3.522 E F0 5.682(.I).31 G(f)-5.682 E F2 (ar)3.512 E(g)-.37 E F0(is)3.402 E .608(absent \(and there is a single) 144 279.6 R F2(sigspec)3.108 E F0 3.108(\)o)C(r)-3.108 E F13.108 E F0 3.108(,e)C .608 (ach speci\214ed signal is reset to its original disposition)-3.108 F .659(\(the v)144 291.6 R .659(alue it had upon entrance to the shell\).) -.25 F(If)5.658 E F2(ar)3.488 E(g)-.37 E F0 .658 (is the null string the signal speci\214ed by each)3.378 F F2(sigspec) 144.34 303.6 Q F0 .58(is ignored by the shell and by the commands it in) 3.39 F -.2(vo)-.4 G -.1(ke).2 G 3.081(s. If).1 F F2(ar)3.411 E(g)-.37 E F0 .581(is not present and)3.301 F F13.081 E F0(has)3.081 E 1.215 (been supplied, then the trap commands associated with each)144 315.6 R F2(sigspec)4.054 E F0 1.214(are displayed.)4.024 F 1.214(If no ar)6.214 F(gu-)-.18 E .86(ments are supplied or if only)144 327.6 R F13.36 E F0 .86(is gi)3.36 F -.15(ve)-.25 G(n,).15 E F1(trap)3.36 E F0 .86 (prints the list of commands associated with each)3.36 F 2.83 (signal. The)144 339.6 R F12.83 E F0 .33(option causes the shell \ to print a list of signal names and their corresponding num-)2.83 F 4.31 (bers. Each)144 351.6 R F2(sigspec)4.65 E F0 1.811 (is either a signal name de\214ned in <)4.62 F F2(signal.h)A F0 1.811 (>, or a signal number)B 6.811(.S)-.55 G(ignal)-6.811 E (names are case insensiti)144 363.6 Q .3 -.15(ve a)-.25 H(nd the).15 E /F3 9/Times-Bold@0 SF(SIG)2.5 E F0(pre\214x is optional.)2.25 E .667 (If a)144 381.6 R F2(sigspec)3.507 E F0(is)3.477 E F3(EXIT)3.167 E F0 .667(\(0\) the command)2.917 F F2(ar)3.496 E(g)-.37 E F0 .666(is e)3.386 F -.15(xe)-.15 G .666(cuted on e).15 F .666(xit from the shell.)-.15 F .666(If a)5.666 F F2(sigspec)3.506 E F0(is)3.476 E F3(DE-)3.166 E -.09 (BU)144 393.6 S(G).09 E/F4 9/Times-Roman@0 SF(,)A F0 .483(the command) 2.733 F F2(ar)3.313 E(g)-.37 E F0 .483(is e)3.203 F -.15(xe)-.15 G .484 (cuted before e).15 F -.15(ve)-.25 G(ry).15 E F2 .484(simple command) 2.984 F F0(,)A F2(for)2.984 E F0(command,)2.984 E F2(case)2.984 E F0 (command,)2.984 E F2(select)144 405.6 Q F0 .563(command, e)3.063 F -.15 (ve)-.25 G .563(ry arithmetic).15 F F2(for)3.063 E F0 .563 (command, and before the \214rst command e)3.063 F -.15(xe)-.15 G .562 (cutes in a shell).15 F .622(function \(see)144 417.6 R F3 .622 (SHELL GRAMMAR)3.122 F F0(abo)2.872 E -.15(ve)-.15 G 3.122(\). Refer).15 F .622(to the description of the)3.122 F F1(extdeb)3.122 E(ug)-.2 E F0 .622(option to the)3.122 F F1(shopt)144 429.6 Q F0 -.2(bu)2.996 G .496 (iltin for details of its ef).2 F .496(fect on the)-.25 F F1(DEB)2.996 E (UG)-.1 E F0 2.996(trap. If)2.996 F(a)2.996 E F2(sigspec)3.336 E F0(is) 3.306 E F3(RETURN)2.996 E F4(,)A F0 .496(the command)2.746 F F2(ar) 144.33 441.6 Q(g)-.37 E F0 .18(is e)2.9 F -.15(xe)-.15 G .18 (cuted each time a shell function or a script e).15 F -.15(xe)-.15 G .18 (cuted with the).15 F F1(.)2.68 E F0(or)2.68 E F1(sour)2.68 E(ce)-.18 E F0 -.2(bu)2.68 G .18(iltins \214nishes).2 F -.15(exe)144 453.6 S (cuting.).15 E .961(If a)144 471.6 R F2(sigspec)3.801 E F0(is)3.771 E F3 (ERR)3.461 E F4(,)A F0 .961(the command)3.211 F F2(ar)3.791 E(g)-.37 E F0 .961(is e)3.681 F -.15(xe)-.15 G .961(cuted whene).15 F -.15(ve)-.25 G 3.461(ra).15 G .96(pipeline \(which may consist of a)-.001 F .185(sin\ gle simple command\), a list, or a compound command returns a non\255ze\ ro e)144 483.6 R .185(xit status, subject to)-.15 F .452(the follo)144 495.6 R .452(wing conditions.)-.25 F(The)5.452 E F3(ERR)2.952 E F0 .451 (trap is not e)2.701 F -.15(xe)-.15 G .451(cuted if the f).15 F .451 (ailed command is part of the com-)-.1 F .387 (mand list immediately follo)144 507.6 R .387(wing a)-.25 F F1(while) 2.887 E F0(or)2.887 E F1(until)2.888 E F0 -.1(ke)2.888 G(yw)-.05 E .388 (ord, part of the test in an)-.1 F F2(if)2.898 E F0 .388 (statement, part)4.848 F .778(of a command e)144 519.6 R -.15(xe)-.15 G .778(cuted in a).15 F F1(&&)3.278 E F0(or)3.278 E F1(||)3.278 E F0 .778 (list e)3.278 F .778(xcept the command follo)-.15 F .778 (wing the \214nal)-.25 F F1(&&)3.278 E F0(or)3.278 E F1(||)3.277 E F0 3.277(,a)C -.15(ny)-3.277 G 1.28(command in a pipeline b)144 531.6 R 1.28(ut the last, or if the command')-.2 F 3.78(sr)-.55 G 1.28(eturn v) -3.78 F 1.28(alue is being in)-.25 F -.15(ve)-.4 G 1.28(rted using).15 F F1(!)3.78 E F0(.)A(These are the same conditions obe)144 543.6 Q (yed by the)-.15 E F1(err)2.5 E(exit)-.18 E F0(\()2.5 E F1A F0 2.5 (\)o)C(ption.)-2.5 E .133 (Signals ignored upon entry to the shell cannot be trapped or reset.)144 561.6 R -.35(Tr)5.132 G .132(apped signals that are not be-).35 F .117 (ing ignored are reset to their original v)144 573.6 R .117 (alues in a subshell or subshell en)-.25 F .117 (vironment when one is cre-)-.4 F 2.5(ated. The)144 585.6 R (return status is f)2.5 E(alse if an)-.1 E(y)-.15 E F2(sigspec)2.84 E F0 (is in)2.81 E -.25(va)-.4 G(lid; otherwise).25 E F1(trap)2.5 E F0 (returns true.)2.5 E F1(type)108 602.4 Q F0([)2.5 E F1(\255aftpP)A F0(]) A F2(name)2.5 E F0([)2.5 E F2(name)A F0(...])2.5 E -.4(Wi)144 614.4 S .174(th no options, indicate ho).4 F 2.674(we)-.25 G(ach)-2.674 E F2 (name)3.034 E F0 -.1(wo)2.854 G .173 (uld be interpreted if used as a command name.).1 F .173(If the)5.173 F F1144 626.4 Q F0 .715(option is used,)3.215 F F1(type)3.215 E F0 .715(prints a string which is one of)3.215 F F2(alias)3.545 E F0(,).27 E F2 -.1(ke)3.215 G(ywor)-.2 E(d)-.37 E F0(,).77 E F2(function)5.185 E F0 (,).24 E F2 -.2(bu)3.215 G(iltin).2 E F0 3.215(,o).24 G(r)-3.215 E F2 (\214le)5.125 E F0(if)3.395 E F2(name)144.36 638.4 Q F0 .087 (is an alias, shell reserv)2.767 F .087(ed w)-.15 F .087 (ord, function, b)-.1 F .086(uiltin, or disk \214le, respecti)-.2 F -.15 (ve)-.25 G(ly).15 E 5.086(.I)-.65 G 2.586(ft)-5.086 G(he)-2.586 E F2 (name)2.946 E F0 .086(is not)2.766 F .118 (found, then nothing is printed, and an e)144 650.4 R .118 (xit status of f)-.15 F .118(alse is returned.)-.1 F .119(If the)5.119 F F12.619 E F0 .119(option is used,)2.619 F F1(type)2.619 E F0 .855 (either returns the name of the disk \214le that w)144 662.4 R .855 (ould be e)-.1 F -.15(xe)-.15 G .855(cuted if).15 F F2(name)3.715 E F0 .855(were speci\214ed as a com-)3.535 F .528(mand name, or nothing if) 144 674.4 R/F5 10/Courier@0 SF .528(type -t name)3.028 F F0 -.1(wo)3.028 G .528(uld not return).1 F F2(\214le)4.938 E F0 5.528(.T).18 G(he)-5.528 E F13.028 E F0 .529(option forces a)3.028 F F3 -.666(PA)3.029 G (TH)-.189 E F0 .007(search for each)144 686.4 R F2(name)2.507 E F0 2.507 (,e)C -.15(ve)-2.757 G 2.507(ni).15 G(f)-2.507 E F5 .007(type -t name) 2.507 F F0 -.1(wo)2.507 G .007(uld not return).1 F F2(\214le)4.417 E F0 5.006(.I).18 G 2.506(fac)-5.006 G .006(ommand is hashed,)-2.506 F F1 2.506 E F0(and)144 698.4 Q F13.23 E F0 .73 (print the hashed v)3.23 F .731 (alue, which is not necessarily the \214le that appears \214rst in)-.25 F F3 -.666(PA)3.231 G(TH)-.189 E F4(.)A F0 .731(If the)5.231 F F1 144 710.4 Q F0 .824(option is used,)3.324 F F1(type)3.324 E F0 .824 (prints all of the places that contain an e)3.324 F -.15(xe)-.15 G .823 (cutable named).15 F F2(name)3.683 E F0 5.823(.T).18 G .823(his in-) -5.823 F 1.176(cludes aliases and functions, if and only if the)144 722.4 R F13.676 E F0 1.176(option is not also used.)3.676 F 1.177 (The table of hashed)6.176 F(GNU Bash 5.1)72 768 Q(2020 October 29) 141.235 E(78)190.395 E 0 Cg EP %%Page: 79 79 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E 1.223 (commands is not consulted when using)144 84 R/F1 10/Times-Bold@0 SF 3.723 E F0 6.223(.T)C(he)-6.223 E F13.723 E F0 1.223 (option suppresses shell function lookup, as)3.723 F .325(with the)144 96 R F1(command)2.825 E F0 -.2(bu)2.825 G(iltin.).2 E F1(type)5.325 E F0 .325(returns true if all of the ar)2.825 F .326(guments are found, f) -.18 F .326(alse if an)-.1 F 2.826(ya)-.15 G .326(re not)-2.826 F (found.)144 108 Q F1(ulimit)108 124.8 Q F0([)2.5 E F1(\255HS)A F0(])A F1 2.5 E(ulimit)108 136.8 Q F0([)2.5 E F1(\255HS)A F0 2.5(][)C F1 (\255bcde\214klmnpqrstuvxPR)-2.5 E(T)-.4 E F0([)2.5 E/F2 10 /Times-Italic@0 SF(limit)A F0(]])A(Pro)144 148.8 Q .244(vides control o) -.15 F -.15(ve)-.15 G 2.744(rt).15 G .244(he resources a)-2.744 F -.25 (va)-.2 G .244 (ilable to the shell and to processes started by it, on systems).25 F .943(that allo)144 160.8 R 3.443(ws)-.25 G .943(uch control.)-3.443 F (The)5.943 E F13.443 E F0(and)3.443 E F13.444 E F0 .944 (options specify that the hard or soft limit is set for the)3.444 F(gi) 144 172.8 Q -.15(ve)-.25 G 2.709(nr).15 G 2.709(esource. A)-2.709 F .208 (hard limit cannot be increased by a non-root user once it is set; a so\ ft limit may)2.709 F .425(be increased up to the v)144 184.8 R .425 (alue of the hard limit.)-.25 F .426(If neither)5.425 F F12.926 E F0(nor)2.926 E F12.926 E F0 .426 (is speci\214ed, both the soft and)2.926 F .139(hard limits are set.)144 196.8 R .139(The v)5.139 F .139(alue of)-.25 F F2(limit)2.729 E F0 .139 (can be a number in the unit speci\214ed for the resource or one)3.319 F .741(of the special v)144 208.8 R(alues)-.25 E F1(hard)3.241 E F0(,)A F1 (soft)3.241 E F0 3.241(,o)C(r)-3.241 E F1(unlimited)3.241 E F0 3.241(,w) C .741(hich stand for the current hard limit, the current)-3.241 F .024 (soft limit, and no limit, respecti)144 220.8 R -.15(ve)-.25 G(ly).15 E 5.023(.I)-.65 G(f)-5.023 E F2(limit)2.613 E F0 .023 (is omitted, the current v)3.203 F .023 (alue of the soft limit of the re-)-.25 F .984 (source is printed, unless the)144 232.8 R F13.484 E F0 .984 (option is gi)3.484 F -.15(ve)-.25 G 3.484(n. When).15 F .985 (more than one resource is speci\214ed, the)3.484 F .7 (limit name and unit, if appropriate, are printed before the v)144 244.8 R 3.2(alue. Other)-.25 F .7(options are interpreted as)3.2 F(follo)144 256.8 Q(ws:)-.25 E F1144 268.8 Q F0 (All current limits are reported; no limits are set)180 268.8 Q F1 144 280.8 Q F0(The maximum sock)180 280.8 Q(et b)-.1 E(uf)-.2 E (fer size)-.25 E F1144 292.8 Q F0 (The maximum size of core \214les created)180 292.8 Q F1144 304.8 Q F0(The maximum size of a process')180 304.8 Q 2.5(sd)-.55 G(ata se) -2.5 E(gment)-.15 E F1144 316.8 Q F0 (The maximum scheduling priority \("nice"\))180 316.8 Q F1144 328.8 Q F0 (The maximum size of \214les written by the shell and its children)180 328.8 Q F1144 340.8 Q F0(The maximum number of pending signals)180 340.8 Q F1144 352.8 Q F0 (The maximum number of kqueues that may be allocated)180 352.8 Q F1 144 364.8 Q F0(The maximum size that may be lock)180 364.8 Q (ed into memory)-.1 E F1144 376.8 Q F0 (The maximum resident set size \(man)180 376.8 Q 2.5(ys)-.15 G (ystems do not honor this limit\))-2.5 E F1144 388.8 Q F0 .791(Th\ e maximum number of open \214le descriptors \(most systems do not allo) 180 388.8 R 3.291(wt)-.25 G .791(his v)-3.291 F .791(alue to)-.25 F (be set\))180 400.8 Q F1144 412.8 Q F0 (The pipe size in 512-byte blocks \(this may not be set\))180 412.8 Q F1 144 424.8 Q F0 (The maximum number of bytes in POSIX message queues)180 424.8 Q F1 144 436.8 Q F0(The maximum real-time scheduling priority)180 436.8 Q F1144 448.8 Q F0(The maximum stack size)180 448.8 Q F1144 460.8 Q F0(The maximum amount of cpu time in seconds)180 460.8 Q F1 144 472.8 Q F0(The maximum number of processes a)180 472.8 Q -.25 (va)-.2 G(ilable to a single user).25 E F1144 484.8 Q F0 .47 (The maximum amount of virtual memory a)180 484.8 R -.25(va)-.2 G .47 (ilable to the shell and, on some systems, to).25 F(its children)180 496.8 Q F1144 508.8 Q F0(The maximum number of \214le locks)180 508.8 Q F1144 520.8 Q F0(The maximum number of pseudoterminals)180 520.8 Q F1144 532.8 Q F0(The maximum time a real-time process can\ run before blocking, in microseconds)180 532.8 Q F1144 544.8 Q F0 (The maximum number of threads)180 544.8 Q(If)144 561.6 Q F2(limit)3.058 E F0 .468(is gi)3.648 F -.15(ve)-.25 G .468(n, and the).15 F F1 2.968 E F0 .468(option is not used,)2.968 F F2(limit)2.968 E F0 .468 (is the ne)2.968 F 2.968(wv)-.25 G .468 (alue of the speci\214ed resource.)-3.218 F(If)5.468 E .045 (no option is gi)144 573.6 R -.15(ve)-.25 G .045(n, then).15 F F1 2.545 E F0 .045(is assumed.)2.545 F -1.11(Va)5.045 G .045 (lues are in 1024-byte increments, e)1.11 F .044(xcept for)-.15 F F1 2.544 E F0 2.544(,w)C .044(hich is)-2.544 F .67(in seconds;)144 585.6 R F13.17 E F0 3.17(,w)C .67(hich is in microseconds;)-3.17 F F13.17 E F0 3.17(,w)C .67(hich is in units of 512-byte blocks;) -3.17 F F13.17 E F0(,)A F13.17 E F0(,)A F13.17 E F0(,) A F1144 597.6 Q F0(,)A F13.737 E F0 3.737(,a)C(nd)-3.737 E F13.736 E F0 3.736(,w)C 1.236(hich are unscaled v)-3.736 F 1.236 (alues; and, when in posix mode,)-.25 F F13.736 E F0(and)3.736 E F13.736 E F0 3.736(,w)C 1.236(hich are in)-3.736 F .238 (512-byte increments.)144 609.6 R .238 (The return status is 0 unless an in)5.238 F -.25(va)-.4 G .238 (lid option or ar).25 F .238(gument is supplied, or an)-.18 F (error occurs while setting a ne)144 621.6 Q 2.5(wl)-.25 G(imit.)-2.5 E F1(umask)108 638.4 Q F0([)2.5 E F1A F0 2.5(][)C F1-2.5 E F0 2.5(][)C F2(mode)-2.5 E F0(])A .18 (The user \214le-creation mask is set to)144 650.4 R F2(mode)3.06 E F0 5.18(.I).18 G(f)-5.18 E F2(mode)3.06 E F0(be)2.86 E .18 (gins with a digit, it is interpreted as an octal)-.15 F .066(number; o\ therwise it is interpreted as a symbolic mode mask similar to that acce\ pted by)144 662.4 R F2 -.15(ch)2.566 G(mod).15 E F0(\(1\).).77 E(If)144 674.4 Q F2(mode)3.263 E F0 .382(is omitted, the current v)3.063 F .382 (alue of the mask is printed.)-.25 F(The)5.382 E F12.882 E F0 .382 (option causes the mask to be)2.882 F .547 (printed in symbolic form; the def)144 686.4 R .547 (ault output is an octal number)-.1 F 5.547(.I)-.55 G 3.047(ft)-5.547 G (he)-3.047 E F13.047 E F0 .547(option is supplied, and)3.047 F F2 (mode)144.38 698.4 Q F0 .552 (is omitted, the output is in a form that may be reused as input.)3.232 F .551(The return status is 0 if the)5.551 F(mode w)144 710.4 Q (as successfully changed or if no)-.1 E F2(mode)2.5 E F0(ar)2.5 E (gument w)-.18 E(as supplied, and f)-.1 E(alse otherwise.)-.1 E (GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(79)190.395 E 0 Cg EP %%Page: 80 80 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E/F1 10/Times-Bold@0 SF(unalias)108 84 Q F0<5bad>2.5 E F1(a)A F0 2.5(][)C/F2 10 /Times-Italic@0 SF(name)-2.5 E F0(...])2.5 E(Remo)144 96 Q 1.057 -.15 (ve e)-.15 H(ach).15 E F2(name)3.257 E F0 .757 (from the list of de\214ned aliases.)3.257 F(If)5.758 E F13.258 E F0 .758(is supplied, all alias de\214nitions are re-)3.258 F(mo)144 108 Q -.15(ve)-.15 G 2.5(d. The).15 F(return v)2.5 E (alue is true unless a supplied)-.25 E F2(name)2.86 E F0 (is not a de\214ned alias.)2.68 E F1(unset)108 124.8 Q F0<5bad>2.5 E F1 (fv)A F0 2.5(][)C-2.5 E F1(n)A F0 2.5(][)C F2(name)-2.5 E F0(...]) 2.5 E -.15(Fo)144 136.8 S 3.804(re).15 G(ach)-3.804 E F2(name)4.164 E F0 3.804(,r).18 G(emo)-3.804 E 1.604 -.15(ve t)-.15 H 1.304 (he corresponding v).15 F 1.303(ariable or function.)-.25 F 1.303 (If the)6.303 F F13.803 E F0 1.303(option is gi)3.803 F -.15(ve) -.25 G 1.303(n, each).15 F F2(name)144.36 148.8 Q F0 .464 (refers to a shell v)3.144 F .464(ariable, and that v)-.25 F .464 (ariable is remo)-.25 F -.15(ve)-.15 G 2.965(d. Read-only).15 F -.25(va) 2.965 G .465(riables may not be un-).25 F 2.769(set. If)144 160.8 R F1 2.769 E F0 .269(is speci\214ed, each)2.769 F F2(name)3.129 E F0 .269(refers to a shell function, and the function de\214nition is remo) 2.949 F -.15(ve)-.15 G(d.).15 E .403(If the)144 172.8 R F12.903 E F0 .404(option is supplied, and)2.904 F F2(name)2.904 E F0 .404(is a v) 2.904 F .404(ariable with the)-.25 F F2(namer)2.904 E(ef)-.37 E F0 (attrib)2.904 E(ute,)-.2 E F2(name)2.904 E F0 .404(will be unset)2.904 F .72(rather than the v)144 184.8 R .72(ariable it references.)-.25 F F1 5.72 E F0 .72(has no ef)3.22 F .719(fect if the)-.25 F F1 3.219 E F0 .719(option is supplied.)3.219 F .719(If no options)5.719 F .736(are supplied, each)144 196.8 R F2(name)3.236 E F0 .736 (refers to a v)3.236 F .737(ariable; if there is no v)-.25 F .737 (ariable by that name, a function with)-.25 F 1.762(that name, if an)144 208.8 R 3.062 -.65(y, i)-.15 H 4.262(su).65 G 4.261(nset. Each)-4.262 F 1.761(unset v)4.261 F 1.761(ariable or function is remo)-.25 F -.15(ve) -.15 G 4.261(df).15 G 1.761(rom the en)-4.261 F(vironment)-.4 E 3.171 (passed to subsequent commands.)144 220.8 R 3.172(If an)8.172 F 5.672 (yo)-.15 G(f)-5.672 E/F3 9/Times-Bold@0 SF -.27(BA)5.672 G(SH_ALIASES) .27 E/F4 9/Times-Roman@0 SF(,)A F3 -.27(BA)5.422 G(SH_ARGV0).27 E F4(,)A F3 -.27(BA)5.422 G(SH_CMDS).27 E F4(,)A F3 -.27(BA)144 232.8 S (SH_COMMAND).27 E F4(,)A F3 -.27(BA)11.482 G(SH_SUBSHELL).27 E F4(,)A F3 -.27(BA)11.482 G(SHPID).27 E F4(,)A F3(COMP_W)11.482 E(ORDBREAKS)-.09 E F4(,)A F3(DIRST)11.481 E -.495(AC)-.81 G(K).495 E F4(,)A F3(EPOCHREAL) 144 244.8 Q(TIME)-.828 E F4(,)A F3(EPOCHSECONDS)2.67 E F4(,)A F3(FUNCN) 2.67 E(AME)-.18 E F4(,)A F3(GR)2.67 E(OUPS)-.27 E F4(,)A F3(HISTCMD)2.67 E F4(,)A F3(LINENO)2.67 E F4(,)A F3(RANDOM)2.67 E F4(,)A F3(SECONDS)144 256.8 Q F4(,)A F0(or)4.03 E F3(SRANDOM)4.28 E F0 1.779(are unset, the) 4.03 F 4.279(yl)-.15 G 1.779(ose their special properties, e)-4.279 F -.15(ve)-.25 G 4.279(ni).15 G 4.279(ft)-4.279 G(he)-4.279 E 4.279(ya) -.15 G 1.779(re subse-)-4.279 F(quently reset.)144 268.8 Q(The e)5 E (xit status is true unless a)-.15 E F2(name)2.86 E F0(is readonly)2.68 E (.)-.65 E F1(wait)108 285.6 Q F0([)2.5 E F1(\255fn)A F0 2.5(][)C F1 -2.5 E F2(varname)2.5 E F0 2.5(][)C F2(id ...)-2.5 E F0(])A -.8 (Wa)144 297.6 S .659(it for each speci\214ed child process and return i\ ts termination status.).8 F(Each)5.659 E F2(id)3.169 E F0 .659 (may be a process)3.929 F .009 (ID or a job speci\214cation; if a job spec is gi)144 309.6 R -.15(ve) -.25 G .008(n, all processes in that job').15 F 2.508(sp)-.55 G .008 (ipeline are w)-2.508 F .008(aited for)-.1 F 5.008(.I)-.55 G(f)-5.008 E F2(id)144.01 321.6 Q F0 .441(is not gi)3.711 F -.15(ve)-.25 G(n,).15 E F1(wait)2.941 E F0 -.1(wa)2.941 G .441 (its for all running background jobs and the last-e).1 F -.15(xe)-.15 G .442(cuted process substitu-).15 F .598 (tion, if its process id is the same as)144 333.6 R F1($!)3.098 E F0 3.098(,a)C .598(nd the return status is zero.)-3.098 F .597(If the)5.597 F F13.097 E F0 .597(option is supplied,)3.097 F F1(wait)144 345.6 Q F0 -.1(wa)3.082 G .583(its for a single job from the list of).1 F F2 (id)3.083 E F0 3.083(so)C 1.383 -.4(r, i)-3.083 H 3.083(fn).4 G(o)-3.083 E F2(id)3.083 E F0 3.083(sa)C .583(re supplied, an)-3.083 F 3.083(yj) -.15 G .583(ob, to complete and)-3.083 F .404(returns its e)144 357.6 R .404(xit status.)-.15 F .403(If none of the supplied ar)5.403 F .403 (guments is a child of the shell, or if no ar)-.18 F(guments)-.18 E .572 (are supplied and the shell has no unw)144 369.6 R .573 (aited-for children, the e)-.1 F .573(xit status is 127.)-.15 F .573 (If the)5.573 F F13.073 E F0 .573(option is)3.073 F .39 (supplied, the process or job identi\214er of the job for which the e) 144 381.6 R .39(xit status is returned is assigned to)-.15 F .905(the v) 144 393.6 R(ariable)-.25 E F2(varname)3.405 E F0 .905 (named by the option ar)3.405 F 3.405(gument. The)-.18 F -.25(va)3.405 G .905(riable will be unset initially).25 F 3.405(,b)-.65 G(efore)-3.405 E (an)144 405.6 Q 3.89(ya)-.15 G 3.89(ssignment. 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Ev).15 F(entually)-.15 E 2.888(,t)-.65 G .388(he options will) -2.888 F(be remo)108 717.6 Q -.15(ve)-.15 G 2.5(di).15 G 2.5(nf)-2.5 G -.2(avo)-2.6 G 2.5(ro).2 G(f)-2.5 E F3 -.27(BA)2.5 G(SH_COMP).27 E -.855 (AT)-.666 G F4(.).855 E F0(GNU Bash 5.1)72 768 Q(2020 October 29)141.235 E(80)190.395 E 0 Cg EP %%Page: 81 81 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 137.14(SH\(1\) General).35 F (Commands Manual)2.5 E -.35(BA)139.64 G(SH\(1\)).35 E 1.164 (Bash-5.0 is the \214nal v)108 84 R 1.164 (ersion for which there will be an indi)-.15 F 1.163 (vidual shopt option for the pre)-.25 F 1.163(vious v)-.25 F(ersion.) -.15 E(Users should use)108 96 Q/F1 9/Times-Bold@0 SF -.27(BA)2.5 G (SH_COMP).27 E -.855(AT)-.666 G F0(on bash-5.0 and later v)3.105 E (ersions.)-.15 E 1.613(The follo)108 112.8 R 1.613 (wing table describes the beha)-.25 F 1.613 (vior changes controlled by each compatibility le)-.2 F -.15(ve)-.25 G 4.113(ls).15 G 4.114(etting. 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