linuxthreads/tst-signal.c

   1 /* Test sigaction wrapper.  */
   2 /* Copyright (C) 2002 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Andreas Schwab <schwab@suse.de>.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <signal.h>
  24
  25 int
  26 main (int argc, char *argv[])
  27 {
  28   struct sigaction old_sa, new_sa;
  29
  30   if (sigaction (SIGHUP, NULL, &old_sa) < 0)
  31     {
  32       printf ("cannot get signal action for SIGHUP: %m\n");
  33       exit (1);
  34     }
  35
  36   if (old_sa.sa_handler != SIG_IGN)
  37     {
  38       printf ("SIGHUP action should be SIG_IGN, is %p\n",
  39               (void *) old_sa.sa_handler);
  40       exit (1);
  41     }
  42
  43   new_sa.sa_handler = SIG_DFL;
  44   if (sigaction (SIGHUP, &new_sa, NULL) < 0)
  45     {
  46       printf ("cannot set signal action for SIGHUP: %m\n");
  47       exit (1);
  48     }
  49
  50   if (sigaction (SIGHUP, NULL, &old_sa) < 0)
  51     {
  52       printf ("cannot get signal action for SIGHUP: %m\n");
  53       exit (1);
  54     }
  55
  56   if (old_sa.sa_handler != SIG_DFL)
  57     {
  58       printf ("SIGHUP action should be SIG_DFL, is %p\n",
  59               (void *) old_sa.sa_handler);
  60       exit (1);
  61     }
  62
  63   return 0;
  64 }