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/* Test of pthread_sigmask in a single-threaded program.
Copyright (C) 2011-2024 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
/* Written by Bruno Haible <bruno@clisp.org>, 2011. */
#include <config.h>
#include <signal.h>
#include "signature.h"
SIGNATURE_CHECK (pthread_sigmask, int, (int, const sigset_t *, sigset_t *));
#include <errno.h>
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "macros.h"
#if !(defined _WIN32 && !defined __CYGWIN__)
static volatile int sigint_occurred;
static void
sigint_handler (_GL_UNUSED int sig)
{
sigint_occurred++;
}
int
main ()
{
sigset_t set;
intmax_t pid = getpid ();
char command[80];
signal (SIGINT, sigint_handler);
sigemptyset (&set);
sigaddset (&set, SIGINT);
/* Check error handling. */
ASSERT (pthread_sigmask (1729, &set, NULL) == EINVAL);
/* Block SIGINT. */
ASSERT (pthread_sigmask (SIG_BLOCK, &set, NULL) == 0);
/* Request a SIGINT signal from outside. */
sprintf (command, "sh -c 'sleep 1; kill -INT %"PRIdMAX"' &", pid);
ASSERT (system (command) == 0);
/* Wait. */
sleep (2);
/* The signal should not have arrived yet, because it is blocked. */
ASSERT (sigint_occurred == 0);
/* Unblock SIGINT. */
ASSERT (pthread_sigmask (SIG_UNBLOCK, &set, NULL) == 0);
/* The signal should have arrived now, because POSIX says
"If there are any pending unblocked signals after the call to
pthread_sigmask(), at least one of those signals shall be delivered
before the call to pthread_sigmask() returns." */
ASSERT (sigint_occurred == 1);
return 0;
}
#else
/* On native Windows, getpid() values and the arguments that are passed to
the (Cygwin?) 'kill' program are not necessarily related. */
int
main ()
{
fputs ("Skipping test: native Windows platform\n", stderr);
return 77;
}
#endif
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