signal/tst-raise.c

   1 /* Copyright (C) 2003-2018 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
   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 <errno.h>
  20 #include <error.h>
  21 #include <signal.h>
  22 #include <stdlib.h>
  23 #include <stdio.h>
  24
  25 volatile int count;
  26
  27 void
  28 sh (int sig)
  29 {
  30   ++count;
  31 }
  32
  33 int
  34 main (void)
  35 {
  36   struct sigaction sa;
  37   sa.sa_handler = sh;
  38   sigemptyset (&sa.sa_mask);
  39   sa.sa_flags = 0;
  40   if (sigaction (SIGUSR1, &sa, NULL) < 0)
  41     {
  42       printf ("sigaction failed: %m\n");
  43       exit (1);
  44     }
  45   if (raise (SIGUSR1) < 0)
  46     {
  47       printf ("first raise failed: %m\n");
  48       exit (1);
  49     }
  50   if (raise (SIGUSR1) < 0)
  51     {
  52       printf ("second raise failed: %m\n");
  53       exit (1);
  54     }
  55   if (count != 2)
  56     {
  57       printf ("signal handler not called 2 times\n");
  58       exit (1);
  59     }
  60   exit (0);
  61 }