strsignal, sigdescr_np, sigdescr_np, sys_siglist - return string describing signal
#include <string.h>
char *strsignal(int sig);
char *sigdescr_np(int sig);
char *sigabbrev_np(int sig);
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 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 sigdabbrev_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.
sigdescr_np() and sigdabbrev_np() first appeared in glibc 2.32.
Starting with version 2.32, the sys_siglist
symbol is no
longer exported by glibc.
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(), sigabbrev_np() | Thread safety | MT-Safe |
strsignal(): POSIX.1-2008. Present on Solaris and the BSDs.
sigdescr_np() and sigdabbrev_np() are GNU extensions.
sys_siglist
is nonstandard, but present on many other
systems.
sigdescr_np() and sigdabbrev_np() are thread-safe and async-signal-safe.
This page is part of release 5.10 of the Linux man-pages
project. A description of the project, information about reporting bugs,
and the latest version of this page, can be found at
https://www.kernel.org/doc/man-pages/.