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Diffstat (limited to 'upstream/debian-unstable/man1/tabs.1')
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diff --git a/upstream/debian-unstable/man1/tabs.1 b/upstream/debian-unstable/man1/tabs.1 new file mode 100644 index 00000000..d81b1d60 --- /dev/null +++ b/upstream/debian-unstable/man1/tabs.1 @@ -0,0 +1,314 @@ +.\"*************************************************************************** +.\" Copyright 2018-2021,2023 Thomas E. Dickey * +.\" Copyright 2008-2016,2017 Free Software Foundation, Inc. * +.\" * +.\" Permission is hereby granted, free of charge, to any person obtaining a * +.\" copy of this software and associated documentation files (the * +.\" "Software"), to deal in the Software without restriction, including * +.\" without limitation the rights to use, copy, modify, merge, publish, * +.\" distribute, distribute with modifications, sublicense, and/or sell * +.\" copies of the Software, and to permit persons to whom the Software is * +.\" furnished to do so, subject to the following conditions: * +.\" * +.\" The above copyright notice and this permission notice shall be included * +.\" in all copies or substantial portions of the Software. * +.\" * +.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * +.\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * +.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * +.\" IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * +.\" DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * +.\" OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * +.\" THE USE OR OTHER DEALINGS IN THE SOFTWARE. * +.\" * +.\" Except as contained in this notice, the name(s) of the above copyright * +.\" holders shall not be used in advertising or otherwise to promote the * +.\" sale, use or other dealings in this Software without prior written * +.\" authorization. * +.\"*************************************************************************** +.\" +.\" $Id: tabs.1,v 1.52 2023/12/23 16:08:25 tom Exp $ +.TH tabs 1 2023-12-23 "ncurses 6.4" "User commands" +.ie \n(.g \{\ +.ds `` \(lq +.ds '' \(rq +.\} +.el \{\ +.ie t .ds `` `` +.el .ds `` "" +.ie t .ds '' '' +.el .ds '' "" +.\} +. +.de bP +.ie n .IP \(bu 4 +.el .IP \(bu 2 +.. +. +.SH NAME +\fB\%tabs\fP \- +set terminal tab stops +.SH SYNOPSIS +\fBtabs\fP [\fIoptions\fP] [\fItabstop-list\fP] +.SH DESCRIPTION +The \fBtabs\fP program clears and sets tab-stops on the terminal. +This uses the terminfo \fBclear_all_tabs\fP and \fBset_tab\fP capabilities. +If either is absent, \fBtabs\fP is unable to clear/set tab-stops. +The terminal should be configured to use hard tabs, e.g., +.PP +.RS 4 +.EX +stty tab0 +.EE +.RE +.PP +Like \fB\%clear\fP(1), \fBtabs\fP writes to the standard output. +You can redirect the standard output to a file (which prevents +\fBtabs\fP from actually changing the tabstops), +and later \fBcat\fP the file to the screen, setting tabstops at that point. +.PP +These are hardware tabs, which cannot be queried rapidly by applications +running in the terminal, if at all. +Curses and other full-screen applications may use hardware tabs +in optimizing their output to the terminal. +If the hardware tabstops differ from the information in the terminal +database, the result is unpredictable. +Before running curses programs, +you should either reset tab-stops to the standard interval +.PP +.RS 4 +.EX +tabs \-8 +.EE +.RE +.PP +or use the \fBreset\fP program, +since the normal initialization sequences do not ensure that tab-stops +are reset. +.SH OPTIONS +.SS "General Options" +.TP 5 +.BI \-T "name" +Tell \fBtabs\fP which terminal type to use. +If this option is not given, \fBtabs\fP will use the \fB$TERM\fP +environment variable. +If that is not set, it will use the \fIansi+tabs\fP entry. +.TP 5 +.B \-d +The debugging option shows a ruler line, followed by two data lines. +The first data line shows the expected tab-stops marked with asterisks. +The second data line shows the actual tab-stops, marked with asterisks. +.TP 5 +.B \-n +This option tells \fBtabs\fP to check the options and run any debugging +option, but not to modify the terminal settings. +.TP +\fB\-V\fP +reports the version of \fI\%ncurses\fP which was used in this program, +and exits. +.PP +The \fBtabs\fP program processes a single list of tab stops. +The last option to be processed which defines a list is the one that +determines the list to be processed. +.SS "Implicit Lists" +Use a single number as an option, +e.g., \*(``\fB\-5\fP\*('' to set tabs at the given +interval (in this case 1, 6, 11, 16, 21, etc.). +Tabs are repeated up to the right margin of the screen. +.PP +Use \*(``\fB\-0\fP\*('' to clear all tabs. +.PP +Use \*(``\fB\-8\fP\*('' to set tabs to the standard interval. +.SS "Explicit Lists" +An explicit list can be defined after the options +(this does not use a \*(``\-\*(''). +The values in the list must be in increasing numeric order, +and greater than zero. +They are separated by a comma or a blank, for example, +.PP +.RS 4 +.EX +tabs 1,6,11,16,21 +tabs 1 6 11 16 21 +.EE +.RE +.PP +Use a \*(``+\*('' to treat a number +as an increment relative to the previous value, +e.g., +.PP +.RS 4 +.EX +tabs 1,+5,+5,+5,+5 +.EE +.RE +.PP +which is equivalent to the 1,6,11,16,21 example. +.SS "Predefined Tab Stops" +POSIX defines several predefined lists of tab stops. +.TP 5 +.B \-a +Assembler, IBM S/370, first format +.br +1,10,16,36,72 +.TP 5 +.B \-a2 +Assembler, IBM S/370, second format +.br +1,10,16,40,72 +.TP 5 +.B \-c +COBOL, normal format +.br +1,8,12,16,20,55 +.TP 5 +.B \-c2 +COBOL compact format +.br +1,6,10,14,49 +.TP 5 +.B \-c3 +COBOL compact format extended +.br +1,6,10,14,18,22,26,30,34,38,42,46,50,54,58,62,67 +.TP 5 +.B \-f +FORTRAN +.br +1,7,11,15,19,23 +.TP 5 +.B \-p +PL/I +.br +1,5,9,13,17,21,25,29,33,37,41,45,49,53,57,61 +.TP 5 +.B \-s +SNOBOL +.br +1,10,55 +.TP 5 +.B \-u +UNIVAC 1100 Assembler +.br +1,12,20,44 +.SS Margins +A few terminals provide the capability for changing their left/right margins. +The tabs program has an option to use this feature: +.TP 5 +.BI +m \ margin +The effect depends on whether the terminal has the margin capabilities: +.RS +.bP +If the terminal provides the capability for setting the left margin, +tabs uses this, and adjusts the available width for tab-stops. +.bP +If the terminal does not provide the margin capabilities, +tabs imitates the effect, putting the tab stops at the appropriate +place on each line. +The terminal's left-margin is not modified. +.RE +.IP +If the \fImargin\fP parameter is omitted, the default is 10. +Use \fB+m0\fP to reset the left margin, +i.e., to the left edge of the terminal's display. +Before setting a left-margin, +tabs resets the margin to reduce problems which might arise +on moving the cursor before the current left-margin. +.PP +When setting or resetting the left-margin, +tabs may reset the right-margin. +.SH FILES +.TP +.I /usr/share/tabset +tab stop initialization database +.SH PORTABILITY +\fIIEEE Std 1003.1/The Open Group Base Specifications Issue 7\fP (POSIX.1-2008) +describes a \fBtabs\fP utility. +However +.bP +This standard describes a \fB+m\fP option, to set a terminal's left-margin. +Very few of the entries in the terminal database provide the +\fBsmgl\fP (\fBset_left_margin\fP) or +\fBsmglp\fP (\fBset_left_margin_parm\fP) +capability needed to support the feature. +.bP +There is no counterpart in X/Open Curses Issue 7 for this utility, +unlike \fB\%tput\fP(1). +.PP +The \fB\-d\fP (debug) and \fB\-n\fP (no-op) options are extensions not provided +by other implementations. +.SH HISTORY +A \fBtabs\fP utility appeared in PWB/Unix 1.0 (1977). +.\" https://minnie.tuhs.org/cgi-bin/utree.pl?file=PWB1/sys/source/s2/\ +.\" tabs.c +A reduced version shipped in Seventh Edition Unix +(early 1979) +.\" https://minnie.tuhs.org/cgi-bin/utree.pl?file=V7/usr/src/cmd/tabs.c +and in 3BSD +.\" https://minnie.tuhs.org/cgi-bin/utree.pl?file=3BSD/usr/src/cmd/\ +.\" tabs.c +(later the same year); +it supported a \*(``\-n\*('' option to set the first tab stop at the +left margin. +That option is not documented by POSIX. +.PP +The PWB/Unix \fBtabs\fP utility returned in System III (1980), +and used built-in tables rather than the terminal database, +to support a half-dozen hardcopy terminal (printer) types. +It also had built-in logic to support setting the left margin, +as well as a feature for copying the tab settings from a file. +.PP +Versions of the program in later releases of AT&T Unix, +such as SVr4, +.\" https://minnie.tuhs.org/cgi-bin/utree.pl?file=SysVR4/cmd/tabs/tabs.c +added support for the terminal database, +but retained the tables to support the printers. +In an earlier development effort, +the tab stop initialization provided by \fB\%tset\fP(1) (1982), +and incorporated into \fB\%tput\fP(1) uses the terminal database, +.PP +The \fB+m\fP option was documented in the POSIX +Base Specifications Issue 5 +(Unix98, 1997), +then omitted in Issue 6 +(Unix03, 2004) +without express motivation, +though an introductory comment +\fI\*(``and optionally adjusts the margin\*(''\fP remains, +overlooked in the removal. +The \fBtabs\fP utility documented in Issues 6 and later has no mechanism +for setting margins. +The \fB+m\fP option in +.I \%ncurses +\fBtabs\fP differs from the SVr4 feature by using terminal capabilities +rather than built-in tables. +.PP +POSIX documents no limit on the number of tab stops. +Other implementations impose one; +the limit is 20 in PWB/Unix's \fBtabs\fP utility. +While some terminals may not accept an arbitrary number of tab stops, +.I \%ncurses +\fBtabs\fP attempts to set tab stops up to the right margin if the list +thereof is sufficiently long. +.PP +The \*(``Rationale\*('' section of the Issue 6 \fBtabs\fP reference page +.\" https://pubs.opengroup.org/onlinepubs/009604499/utilities/tabs.html +details how the committee considered redesigning the \fBtabs\fP and +\fBtput\fP utilities, +without settling on an improved solution. +It claims that +.RS 5 +.PP +no known historical version of tabs supports the capability of setting +arbitrary tab stops. +.RE +.PP +Nevertheless, +the feature described in subsection \*(``Explicit Lists\*('' above was +implemented in PWB/Unix, +and permits the setting of abitrary tab stops. +.SH SEE ALSO +\fB\%infocmp\fP(1), +\fB\%tset\fP(1), +\fB\%ncurses\fP(3NCURSES), +\fB\%terminfo\fP(5) |