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[];
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.
sigdescr_np() and
sigabbrev_np() first appeared in glibc 2.32.
Starting with glibc 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
sigabbrev_np() are GNU extensions.
sys_siglist is nonstandard, but present on many other systems.
sigdescr_np() and
sigabbrev_np() are thread-safe and
async-signal-safe.
psignal(3),
strerror(3)