glibc/stdio-common/psignal.c

/* Copyright (C) 1991, 1992, 1995, 1996 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., 675 Mass Ave,
Cambridge, MA 02139, USA.  */

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


#ifndef	HAVE_GNU_LD
#define	_sys_siglist	sys_siglist
#endif

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


/* Print out on stderr a line consisting of the test in S, a colon, a space,
   a message describing the meaning of the signal number SIG and a newline.
   If S is NULL or "", the colon and space are omitted.  */
void
psignal (int sig, const char *s)
{
  const char *colon, *desc;

  if (s == NULL || s == '\0')
    s = colon = "";
  else
    colon = ": ";

  if (sig >= 0 && sig < NSIG && (desc = _sys_siglist[sig]) != NULL)
    (void) fprintf (stderr, "%s%s%s\n", s, colon, _(desc));
  else
    (void) fprintf (stderr, _("%s%sUnknown signal %d\n"), s, colon, sig);
}