stdio-common/psignal.c

   1 /* Copyright (C) 1991-2024 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <stdio.h>
  19 #include <signal.h>
  20 #include <stdlib.h>
  21 #include <libintl.h>
  22 #include <wchar.h>
  23
  24 /* Print out on stderr a line consisting of the test in S, a colon, a space,
  25    a message describing the meaning of the signal number SIG and a newline.
  26    If S is NULL or "", the colon and space are omitted.  */
  27 void
  28 psignal (int sig, const char *s)
  29 {
  30   const char *colon, *desc;
  31
  32   if (s == NULL || *s == '\0')
  33     s = colon = "";
  34   else
  35     colon = ": ";
  36
  37   if (sig >= 0 && sig < NSIG && (desc = __sys_siglist[sig]) != NULL)
  38     (void) __fxprintf (NULL, "%s%s%s\n", s, colon, _(desc));
  39   else
  40     {
  41       char *buf;
  42
  43       if (__asprintf (&buf, _("%s%sUnknown signal %d\n"), s, colon, sig) < 0)
  44         (void) __fxprintf (NULL, "%s%s%s\n", s, colon, _("Unknown signal"));
  45       else
  46         {
  47           (void) __fxprintf (NULL, "%s", buf);
  48
  49           free (buf);
  50         }
  51     }
  52 }