strsignal

STRSIGNAL(3)               Linux Programmer's Manual              STRSIGNAL(3)

NAME
       strsignal,  sigdescr_np,  sigdescr_np,  sys_siglist - return string de-
       scribing signal

SYNOPSIS
       #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

DESCRIPTION
       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 num-
       ber 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() func-
       tion should be used instead of this array; see also VERSIONS.

RETURN VALUE
       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.

VERSIONS
       sigdescr_np() and sigdabbrev_np() first appeared in glibc 2.32.

       Starting with version 2.32, the sys_siglist symbol  is  no  longer  ex-
       ported by glibc.

ATTRIBUTES
       For  an  explanation  of  the  terms  used  in  this  section,  see at-
       tributes(7).

       +---------------+---------------+---------------------------------+
       |Interface      | Attribute     | Value                           |
       +---------------+---------------+---------------------------------+
       |strsignal()    | Thread safety | MT-Unsafe race:strsignal locale |
       +---------------+---------------+---------------------------------+
       |sigdescr_np(), | Thread safety | MT-Safe                         |
       |sigabbrev_np() |               |                                 |
       +---------------+---------------+---------------------------------+

CONFORMING TO
       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.

NOTES
       sigdescr_np()  and  sigdabbrev_np()  are  thread-safe and async-signal-
       safe.

SEE ALSO
       psignal(3), strerror(3)

COLOPHON
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       latest    version    of    this    page,    can     be     found     at
       https://www.kernel.org/doc/man-pages/.

GNU                               2020-11-01                      STRSIGNAL(3)