strsignal

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



NAME
       strsignal, sigdescr_np, sigdescr_np, sys_siglist - return string
       describing 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 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.

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 exported
       by glibc.

ATTRIBUTES
       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() │               │                                        │
       └───────────────┴───────────────┴────────────────────────────────────────┘

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
       This page is part of release 5.11 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/.



GNU                                2021-03-22                       STRSIGNAL(3)