plucky (3) strsignal.3posix.gz

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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 returned
       pointer might also be invalidated if the calling thread is terminated.

       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.1‐2017, <string.h>


       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1-2017, Standard
       for Information  Technology  --  Portable  Operating  System  Interface  (POSIX),  The  Open  Group  Base
       Specifications  Issue  7, 2018 Edition, Copyright (C) 2018 by the Institute of Electrical and Electronics
       Engineers, Inc and The Open Group.  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.opengroup.org/unix/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 .