PROLOG

       This  manual  page  is part of the POSIX Programmer's Manual.  The Linux implementation of
       this interface may differ (consult the corresponding Linux  manual  page  for  details  of
       Linux behavior), or the interface may not be implemented on Linux.

NAME

       strsignal — get name of signal

SYNOPSIS

       #include <string.h>

       char *strsignal(int signum);

DESCRIPTION

       The  strsignal()  function  shall  map  the  signal number in signum to an implementation-
       defined string and shall return a pointer to it.  It shall use the same set of messages as
       the psignal() function.

       The  application  shall  not  modify  the  string  returned. The returned pointer might be
       invalidated or the string content might be overwritten by a subsequent call to strsignal()
       or setlocale().

       The  contents  of  the message strings returned by strsignal() should be determined by the
       setting of the LC_MESSAGES category in the current locale.

       The implementation shall  behave  as  if  no  function  defined  in  this  standard  calls
       strsignal().

       Since  no  return  value is reserved to indicate an error, an application wishing to check
       for error situations should set errno to 0, then call strsignal(), then check errno.

       The strsignal() function need not be thread-safe.

RETURN VALUE

       Upon successful completion, strsignal() shall return a pointer to a string. Otherwise,  if
       signum is not a valid signal number, the return value is unspecified.

ERRORS

       No errors are defined.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       None.

RATIONALE

       If signum is not a valid signal number, some implementations return NULL, while for others
       the strsignal() function returns a pointer to a string containing an  unspecified  message
       denoting an unknown signal. POSIX.1‐2008 leaves this return value unspecified.

FUTURE DIRECTIONS

       None.

SEE ALSO

       psiginfo(), setlocale()

       The Base Definitions volume of POSIX.1‐2008, <string.h>

COPYRIGHT

       Portions  of  this  text  are  reprinted  and  reproduced in electronic form from IEEE Std
       1003.1, 2013 Edition, Standard for Information Technology  --  Portable  Operating  System
       Interface  (POSIX),  The Open Group Base Specifications Issue 7, Copyright (C) 2013 by the
       Institute of Electrical and Electronics Engineers, Inc  and  The  Open  Group.   (This  is
       POSIX.1-2008  with  the  2013  Technical  Corrigendum  1  applied.)  In  the  event of any
       discrepancy between this version and the original IEEE and The Open  Group  Standard,  the
       original  IEEE  and The Open Group Standard is the referee document. The original Standard
       can be obtained online at http://www.unix.org/online.html .

       Any typographical or formatting errors that appear in this page are most  likely  to  have
       been  introduced  during  the conversion of the source files to man page format. To report
       such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html .