stdio-common/psignal.c

   1 /* Copyright (C) 1991, 1992, 1995, 1996, 1997, 2001, 2002, 2004, 2005, 2009
   2    Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <stdio.h>
  20 #include <signal.h>
  21 #include <stdlib.h>
  22 #include <libintl.h>
  23 #include <wchar.h>
  24
  25
  26 /* Defined in sys_siglist.c.  */
  27 extern const char *const _sys_siglist[];
  28 extern const char *const _sys_siglist_internal[] attribute_hidden;
  29
  30
  31 /* Print out on stderr a line consisting of the test in S, a colon, a space,
  32    a message describing the meaning of the signal number SIG and a newline.
  33    If S is NULL or "", the colon and space are omitted.  */
  34 void
  35 psignal (int sig, const char *s)
  36 {
  37   const char *colon, *desc;
  38
  39   if (s == NULL || *s == '\0')
  40     s = colon = "";
  41   else
  42     colon = ": ";
  43
  44   if (sig >= 0 && sig < NSIG && (desc = INTUSE(_sys_siglist)[sig]) != NULL)
  45     (void) __fxprintf (NULL, "%s%s%s\n", s, colon, _(desc));
  46   else
  47     {
  48       char *buf;
  49
  50       if (__asprintf (&buf, _("%s%sUnknown signal %d\n"), s, colon, sig) < 0)
  51         (void) __fxprintf (NULL, "%s%s%s\n", s, colon, _("Unknown signal"));
  52       else
  53         {
  54           (void) __fxprintf (NULL, "%s", buf);
  55
  56           free (buf);
  57         }
  58     }
  59 }