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/* Copyright (C) 2006-2025 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <intprops.h>
#include <support/check.h>
#include <support/support.h>
#include <support/xsignal.h>
#include <support/xunistd.h>
#include <support/xtime.h>
#include <stdlib.h>
static volatile int handler_called;
static void
handler (int sig)
{
handler_called = 1;
}
static void
test_pselect_basic (void)
{
struct sigaction sa;
sa.sa_handler = handler;
sa.sa_flags = 0;
sigemptyset (&sa.sa_mask);
xsigaction (SIGUSR1, &sa, NULL);
sa.sa_handler = SIG_IGN;
xsigaction (SIGCHLD, &sa, NULL);
sigset_t ss_usr1;
sigemptyset (&ss_usr1);
sigaddset (&ss_usr1, SIGUSR1);
TEST_COMPARE (sigprocmask (SIG_BLOCK, &ss_usr1, NULL), 0);
int fds[2][2];
xpipe (fds[0]);
xpipe (fds[1]);
fd_set rfds;
FD_ZERO (&rfds);
sigset_t ss;
TEST_COMPARE (sigprocmask (SIG_SETMASK, NULL, &ss), 0);
sigdelset (&ss, SIGUSR1);
struct timespec to = { .tv_sec = 0, .tv_nsec = 500000000 };
pid_t parent = getpid ();
pid_t p = xfork ();
if (p == 0)
{
xclose (fds[0][1]);
xclose (fds[1][0]);
FD_SET (fds[0][0], &rfds);
int e;
do
{
if (getppid () != parent)
FAIL_EXIT1 ("getppid()=%d != parent=%d", getppid(), parent);
errno = 0;
e = pselect (fds[0][0] + 1, &rfds, NULL, NULL, &to, &ss);
}
while (e == 0);
TEST_COMPARE (e, -1);
TEST_COMPARE (errno, EINTR);
TEMP_FAILURE_RETRY (write (fds[1][1], "foo", 3));
exit (0);
}
xclose (fds[0][0]);
xclose (fds[1][1]);
FD_SET (fds[1][0], &rfds);
TEST_COMPARE (kill (p, SIGUSR1), 0);
int e = pselect (fds[1][0] + 1, &rfds, NULL, NULL, NULL, &ss);
TEST_COMPARE (e, 1);
TEST_VERIFY (FD_ISSET (fds[1][0], &rfds));
}
static void
test_pselect_large_timeout (void)
{
support_create_timer (0, 100000000, false, NULL);
int fds[2];
xpipe (fds);
fd_set rfds;
FD_ZERO (&rfds);
FD_SET (fds[0], &rfds);
sigset_t ss;
TEST_COMPARE (sigprocmask (SIG_SETMASK, NULL, &ss), 0);
sigdelset (&ss, SIGALRM);
struct timespec ts = { TYPE_MAXIMUM (time_t), 0 };
TEST_COMPARE (pselect (fds[0] + 1, &rfds, NULL, NULL, &ts, &ss), -1);
TEST_VERIFY (errno == EINTR || errno == EOVERFLOW);
}
static int
do_test (void)
{
test_pselect_basic ();
test_pselect_large_timeout ();
return 0;
}
#include <support/test-driver.c>
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