diff options
Diffstat (limited to 'man3/strsignal.3')
| -rw-r--r-- | man3/strsignal.3 | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/man3/strsignal.3 b/man3/strsignal.3 new file mode 100644 index 0000000..3aaacec --- /dev/null +++ b/man3/strsignal.3 @@ -0,0 +1,170 @@ +'\" t +.\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk) +.\" and Copyright (C) 2020 Michael Kerrisk <mtk.manpages@gmail.com> +.\" +.\" SPDX-License-Identifier: Linux-man-pages-copyleft +.\" +.\" References consulted: +.\" Linux libc source code +.\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991) +.\" 386BSD man pages +.\" Modified Sat Jul 24 17:59:03 1993 by Rik Faith (faith@cs.unc.edu) +.TH strsignal 3 2023-07-20 "Linux man-pages 6.05.01" +.SH NAME +strsignal, sigabbrev_np, sigdescr_np, sys_siglist \- +return string describing signal +.SH LIBRARY +Standard C library +.RI ( libc ", " \-lc ) +.SH SYNOPSIS +.nf +.B #include <string.h> +.PP +.BI "char *strsignal(int " sig ); +.BI "const char *sigdescr_np(int " sig ); +.BI "const char *sigabbrev_np(int " sig ); +.PP +.BI "[[deprecated]] extern const char *const " sys_siglist []; +.fi +.PP +.RS -4 +Feature Test Macro Requirements for glibc (see +.BR feature_test_macros (7)): +.RE +.PP +.BR sigabbrev_np (), +.BR sigdescr_np (): +.nf + _GNU_SOURCE +.fi +.PP +.BR strsignal (): +.nf + From glibc 2.10 to glibc 2.31: + _POSIX_C_SOURCE >= 200809L + Before glibc 2.10: + _GNU_SOURCE +.fi +.PP +.IR sys_siglist : +.nf + Since glibc 2.19: + _DEFAULT_SOURCE + glibc 2.19 and earlier: + _BSD_SOURCE +.fi +.SH DESCRIPTION +The +.BR strsignal () +function returns a string describing the signal +number passed in the argument +.IR sig . +The string can be used only until the next call to +.BR strsignal (). +The string returned by +.BR strsignal () +is localized according to the +.B LC_MESSAGES +category in the current locale. +.PP +The +.BR sigdescr_np () +function returns a string describing the signal +number passed in the argument +.IR sig . +Unlike +.BR strsignal () +this string is not influenced by the current locale. +.PP +The +.BR sigabbrev_np () +function returns the abbreviated name of the signal, +.IR sig . +For example, given the value +.BR SIGINT , +it returns the string "INT". +.PP +The (deprecated) array +.I sys_siglist +holds the signal description strings +indexed by signal number. +The +.BR strsignal () +or the +.BR sigdescr_np () +function should be used instead of this array; see also VERSIONS. +.SH RETURN VALUE +The +.BR strsignal () +function returns the appropriate description +string, or an unknown signal message if the signal number is invalid. +On some systems (but not on Linux), NULL may instead be +returned for an invalid signal number. +.PP +The +.BR sigdescr_np () +and +.BR sigabbrev_np () +functions return the appropriate description string. +The returned string is statically allocated and valid for +the lifetime of the program. +These functions return NULL for an invalid signal number. +.SH ATTRIBUTES +For an explanation of the terms used in this section, see +.BR attributes (7). +.TS +allbox; +lb lb lbx +l l l. +Interface Attribute Value +T{ +.na +.nh +.BR strsignal () +T} Thread safety T{ +.na +.nh +MT-Unsafe race:strsignal locale +T} +T{ +.na +.nh +.BR sigdescr_np (), +.BR sigabbrev_np () +T} Thread safety MT-Safe +.TE +.sp 1 +.SH STANDARDS +.TP +.BR strsignal () +POSIX.1-2008. +.TP +.BR sigdescr_np () +.TQ +.BR sigabbrev_np () +GNU. +.TP +.I sys_siglist +None. +.\" glibc commit b1ccfc061feee9ce616444ded8e1cd5acf9fa97f +.SH HISTORY +.TP +.BR strsignal () +POSIX.1-2008. +Solaris, BSD. +.TP +.BR sigdescr_np () +.TQ +.BR sigabbrev_np () +glibc 2.32. +.TP +.I sys_siglist +Removed in glibc 2.32. +.SH NOTES +.BR sigdescr_np () +and +.BR sigabbrev_np () +are thread-safe and async-signal-safe. +.SH SEE ALSO +.BR psignal (3), +.BR strerror (3) |