signal/tst-raise.c

   1 /* Copyright (C) 2003-2021 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 <errno.h>
  19 #include <error.h>
  20 #include <signal.h>
  21 #include <stdlib.h>
  22 #include <stdio.h>
  23
  24 volatile int count;
  25
  26 void
  27 sh (int sig)
  28 {
  29   ++count;
  30 }
  31
  32 int
  33 main (void)
  34 {
  35   struct sigaction sa;
  36   sa.sa_handler = sh;
  37   sigemptyset (&sa.sa_mask);
  38   sa.sa_flags = 0;
  39   if (sigaction (SIGUSR1, &sa, NULL) < 0)
  40     {
  41       printf ("sigaction failed: %m\n");
  42       exit (1);
  43     }
  44   if (raise (SIGUSR1) < 0)
  45     {
  46       printf ("first raise failed: %m\n");
  47       exit (1);
  48     }
  49   if (raise (SIGUSR1) < 0)
  50     {
  51       printf ("second raise failed: %m\n");
  52       exit (1);
  53     }
  54   if (count != 2)
  55     {
  56       printf ("signal handler not called 2 times\n");
  57       exit (1);
  58     }
  59   exit (0);
  60 }