man3/strsignal.3

   1 .\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
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  23 .\" References consulted:
  24 .\"     Linux libc source code
  25 .\"     Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
  26 .\"     386BSD man pages
  27 .\" Modified Sat Jul 24 17:59:03 1993 by Rik Faith (faith@cs.unc.edu)
  28 .TH STRSIGNAL 3  2010-09-15 "GNU" "Linux Programmer's Manual"
  29 .SH NAME
  30 strsignal \- return string describing signal
  31 .SH SYNOPSIS
  32 .nf
  33 .B #include <string.h>
  34 .sp
  35 .BI "char *strsignal(int " sig );
  36 .sp
  37 .BI "extern const char * const " sys_siglist [];
  38 .fi
  39 .sp
  40 .in -4n
  41 Feature Test Macro Requirements for glibc (see
  42 .BR feature_test_macros (7)):
  43 .in
  44 .sp
  45 .BR strsignal ():
  46 .br
  47 Since glibc 2.10: _POSIX_C_SOURCE\ >=\ 200809L || _XOPEN_SOURCE\ >=\ 700
  48 .br
  49 Before glibc 2.10:
  50 _GNU_SOURCE
  51 .SH DESCRIPTION
  52 The
  53 .BR strsignal ()
  54 function returns a string describing the signal
  55 number passed in the argument \fIsig\fP.
  56 The string can only be used
  57 until the next call to
  58 .BR strsignal ().
  59 .PP
  60 The array \fIsys_siglist\fP holds the signal description strings
  61 indexed by signal number.
  62 The
  63 .BR strsignal ()
  64 function should be
  65 used if possible instead of this array.
  66 .SH "RETURN VALUE"
  67 The
  68 .BR strsignal ()
  69 function returns the appropriate description
  70 string, or an unknown signal message if the signal number is invalid.
  71 On some systems (but not on Linux), a NULL pointer may be
  72 returned instead for an invalid signal number.
  73 .SH "CONFORMING TO"
  74 POSIX.1-2008.
  75 Present on Solaris and the BSDs.
  76 .SH "SEE ALSO"
  77 .BR psignal (3),
  78 .BR strerror (3),
  79 .BR feature_test_macros (7)