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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ATTRIBUTES | STANDARDS | HISTORY | NOTES | SEE ALSO | COLOPHON |
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strsignal(3) Library Functions Manual strsignal(3)
strsignal, sigabbrev_np, sigdescr_np, sys_siglist - return string
describing signal
Standard C library (libc, -lc)
#include <string.h>
char *strsignal(int sig);
const char *sigdescr_np(int sig);
const char *sigabbrev_np(int sig);
[[deprecated]] extern const char *const sys_siglist[];
Feature Test Macro Requirements for glibc (see
feature_test_macros(7)):
sigabbrev_np(), sigdescr_np():
_GNU_SOURCE
strsignal():
From glibc 2.10 to glibc 2.31:
_POSIX_C_SOURCE >= 200809L
Before glibc 2.10:
_GNU_SOURCE
sys_siglist:
Since glibc 2.19:
_DEFAULT_SOURCE
glibc 2.19 and earlier:
_BSD_SOURCE
The strsignal() function returns a string describing the signal
number passed in the argument sig. The string can be used only
until the next call to strsignal(). The string returned by
strsignal() is localized according to the LC_MESSAGES category in
the current locale.
The sigdescr_np() function returns a string describing the signal
number passed in the argument sig. Unlike strsignal() this string
is not influenced by the current locale.
The sigabbrev_np() function returns the abbreviated name of the
signal, sig. For example, given the value SIGINT, it returns the
string "INT".
The (deprecated) array sys_siglist holds the signal description
strings indexed by signal number. The strsignal() or the
sigdescr_np() function should be used instead of this array; see
also VERSIONS.
The 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.
The sigdescr_np() and 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.
For an explanation of the terms used in this section, see
attributes(7).
┌────────────────┬───────────────┬───────────────────────────────┐
│ Interface │ Attribute │ Value │
├────────────────┼───────────────┼───────────────────────────────┤
│ strsignal() │ Thread safety │ MT-Unsafe race:strsignal │
│ │ │ locale │
├────────────────┼───────────────┼───────────────────────────────┤
│ sigdescr_np(), │ Thread safety │ MT-Safe │
│ sigabbrev_np() │ │ │
└────────────────┴───────────────┴───────────────────────────────┘
strsignal()
POSIX.1-2008.
sigdescr_np()
sigabbrev_np()
GNU.
sys_siglist
None.
strsignal()
POSIX.1-2008. Solaris, BSD.
sigdescr_np()
sigabbrev_np()
glibc 2.32.
sys_siglist
Removed in glibc 2.32.
sigdescr_np() and sigabbrev_np() are thread-safe and async-signal-
safe.
psignal(3), strerror(3)
This page is part of the man-pages (Linux kernel and C library
user-space interface documentation) project. Information about
the project can be found at
⟨https://www.kernel.org/doc/man-pages/⟩. If you have a bug report
for this manual page, see
⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
This page was obtained from the tarball man-pages-6.15.tar.gz
fetched from
⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
2025-08-11. If you discover any rendering problems in this HTML
version of the page, or you believe there is a better or more up-
to-date source for the page, or you have corrections or
improvements to the information in this COLOPHON (which is not
part of the original manual page), send a mail to
man-pages@man7.org
Linux man-pages 6.15 2025-05-17 strsignal(3)
Pages that refer to this page: psignal(3), strerror(3), signal(7)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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