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/* Test of sigprocmask.
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 (sigprocmask, 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 (sigprocmask (1729, &set, NULL) == -1);
ASSERT (errno == EINVAL);
/* Block SIGINT. */
ASSERT (sigprocmask (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 (sigprocmask (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
sigprocmask(), at least one of those signals shall be delivered
before the call to sigprocmask() 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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