string/strsignal.c

/* Copyright (C) 1991, 1994, 1995, 1996, 1997 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public License as
   published by the Free Software Foundation; either version 2 of the
   License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#include <signal.h>
#include <stdio.h>
#include <string.h>


#ifndef	HAVE_GNU_LD
#define	_sys_siglist	sys_siglist
#endif

/* Defined in siglist.c.  */
extern const char *const _sys_siglist[];


/* Return a string describing the meaning of the signal number SIGNUM.  */
char *
strsignal (int signum)
{
  const char *desc;

  if (signum < 0 || signum > NSIG || (desc = _sys_siglist[signum]) == NULL)
    {
      static char buf[512];
      int len = __snprintf (buf, sizeof buf, _("Unknown signal %d"), signum);
      if (len < 0)
	return NULL;
      buf[len - 1] = '\0';
      return buf;
    }

  return (char *) _(desc);
}