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86 lines
2.3 KiB
C
86 lines
2.3 KiB
C
/* Check that sigwait does not fail with EINTR (bug 22478).
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Copyright (C) 2017-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <signal.h>
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#include <stdio.h>
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#include <support/check.h>
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#include <support/xunistd.h>
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#include <time.h>
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#include <unistd.h>
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/* Handler for SIGUSR1. */
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static void
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sigusr1_handler (int signo)
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{
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TEST_VERIFY (signo == SIGUSR1);
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}
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/* Spawn a subprocess to send two signals: First SIGUSR1, then
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SIGUSR2. Return the PID of the process. */
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static pid_t
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signal_sender (void)
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{
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pid_t pid = xfork ();
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if (pid == 0)
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{
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static const struct timespec delay = { 1, };
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if (nanosleep (&delay, NULL) != 0)
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FAIL_EXIT1 ("nanosleep: %m");
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if (kill (getppid (), SIGUSR1) != 0)
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FAIL_EXIT1 ("kill (SIGUSR1): %m");
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if (nanosleep (&delay, NULL) != 0)
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FAIL_EXIT1 ("nanosleep: %m");
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if (kill (getppid (), SIGUSR2) != 0)
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FAIL_EXIT1 ("kill (SIGUSR2): %m");
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_exit (0);
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}
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return pid;
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}
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static int
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do_test (void)
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{
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if (signal (SIGUSR1, sigusr1_handler) == SIG_ERR)
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FAIL_EXIT1 ("signal (SIGUSR1): %m\n");
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sigset_t sigs;
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sigemptyset (&sigs);
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sigaddset (&sigs, SIGUSR2);
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if (sigprocmask (SIG_BLOCK, &sigs, NULL) != 0)
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FAIL_EXIT1 ("sigprocmask (SIGBLOCK, SIGUSR2): %m");
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pid_t pid = signal_sender ();
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int signo = 0;
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int ret = sigwait (&sigs, &signo);
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if (ret != 0)
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{
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support_record_failure ();
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errno = ret;
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printf ("error: sigwait failed: %m (%d)\n", ret);
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}
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TEST_VERIFY (signo == SIGUSR2);
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int status;
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xwaitpid (pid, &status, 0);
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TEST_VERIFY (status == 0);
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return 0;
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}
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#include <support/test-driver.c>
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