strsignal(3) - Linux manual page (original) (raw)

strsignal(3) Library Functions Manual strsignal(3)

NAME top

   strsignal, sigabbrev_np, sigdescr_np, sys_siglist - return string
   describing signal

LIBRARY top

   Standard C library (_libc_, _-lc_)

SYNOPSIS top

   **#include <string.h>**

   **char *strsignal(int** _sig_**);**
   **const char *sigdescr_np(int** _sig_**);**
   **const char *sigabbrev_np(int** _sig_**);**

   **[[deprecated]] extern const char *const** _syssiglist_**[];**

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

   _syssiglist_:
       Since glibc 2.19:
           _DEFAULT_SOURCE
       glibc 2.19 and earlier:
           _BSD_SOURCE

DESCRIPTION top

   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 _syssiglist_ 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 top

   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.

ATTRIBUTES top

   For an explanation of the terms used in this section, see
   [attributes(7)](../man7/attributes.7.html).
   ┌────────────────┬───────────────┬───────────────────────────────┐
   │ **Interface** │ **Attribute** │ **Value** │
   ├────────────────┼───────────────┼───────────────────────────────┤
   │ **strsignal**()    │ Thread safety │ MT-Unsafe race:strsignal      │
   │                │               │ locale                        │
   ├────────────────┼───────────────┼───────────────────────────────┤
   │ **sigdescr_np**(), │ Thread safety │ MT-Safe                       │
   │ **sigabbrev_np**() │               │                               │
   └────────────────┴───────────────┴───────────────────────────────┘

STANDARDS top

   **strsignal**()
          POSIX.1-2008.

   **sigdescr_np**()
   **sigabbrev_np**()
          GNU.

   _syssiglist_
          None.

HISTORY top

   **strsignal**()
          POSIX.1-2008.  Solaris, BSD.

   **sigdescr_np**()
   **sigabbrev_np**()
          glibc 2.32.

   _syssiglist_
          Removed in glibc 2.32.

NOTES top

   **sigdescr_np**() and **sigabbrev_np**() are thread-safe and async-signal-
   safe.

SEE ALSO top

   [psignal(3)](../man3/psignal.3.html), [strerror(3)](../man3/strerror.3.html)

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Linux man-pages 6.10 2024-07-23 strsignal(3)

Pages that refer to this page:psignal(3), strerror(3), signal(7)