tests/test-pthread_sigmask1.c

   1 /* Test of pthread_sigmask in a single-threaded program.
   2    Copyright (C) 2011-2024 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation, either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program 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
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 /* Written by Bruno Haible <bruno@clisp.org>, 2011.  */
  18
  19 #include <config.h>
  20
  21 #include <signal.h>
  22
  23 #include "signature.h"
  24 SIGNATURE_CHECK (pthread_sigmask, int, (int, const sigset_t *, sigset_t *));
  25
  26 #include <errno.h>
  27 #include <inttypes.h>
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30 #include <unistd.h>
  31
  32 #include "macros.h"
  33
  34 #if !(defined _WIN32 && !defined __CYGWIN__)
  35
  36 static volatile int sigint_occurred;
  37
  38 static void
  39 sigint_handler (_GL_UNUSED int sig)
  40 {
  41   sigint_occurred++;
  42 }
  43
  44 int
  45 main ()
  46 {
  47   sigset_t set;
  48   intmax_t pid = getpid ();
  49   char command[80];
  50
  51   signal (SIGINT, sigint_handler);
  52
  53   sigemptyset (&set);
  54   sigaddset (&set, SIGINT);
  55
  56   /* Check error handling.  */
  57   ASSERT (pthread_sigmask (1729, &set, NULL) == EINVAL);
  58
  59   /* Block SIGINT.  */
  60   ASSERT (pthread_sigmask (SIG_BLOCK, &set, NULL) == 0);
  61
  62   /* Request a SIGINT signal from outside.  */
  63   sprintf (command, "sh -c 'sleep 1; kill -INT %"PRIdMAX"' &", pid);
  64   ASSERT (system (command) == 0);
  65
  66   /* Wait.  */
  67   sleep (2);
  68
  69   /* The signal should not have arrived yet, because it is blocked.  */
  70   ASSERT (sigint_occurred == 0);
  71
  72   /* Unblock SIGINT.  */
  73   ASSERT (pthread_sigmask (SIG_UNBLOCK, &set, NULL) == 0);
  74
  75   /* The signal should have arrived now, because POSIX says
  76        "If there are any pending unblocked signals after the call to
  77         pthread_sigmask(), at least one of those signals shall be delivered
  78         before the call to pthread_sigmask() returns."  */
  79   ASSERT (sigint_occurred == 1);
  80
  81   return test_exit_status;
  82 }
  83
  84 #else
  85
  86 /* On native Windows, getpid() values and the arguments that are passed to
  87    the (Cygwin?) 'kill' program are not necessarily related.  */
  88
  89 int
  90 main ()
  91 {
  92   fputs ("Skipping test: native Windows platform\n", stderr);
  93   return 77;
  94 }
  95
  96 #endif