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/* Test for timerfd related functions
Copyright (C) 2021-2024 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 <time.h>
#include <support/check.h>
#include <support/support.h>
#include <support/xunistd.h>
#include <support/timespec.h>
#include <sys/time.h>
#include <sys/timerfd.h>
static void
timerfd_test (void)
{
struct itimerspec settings = { { 0, 0 }, { 2, 0 } };
struct itimerspec val;
int fd, ret;
fd = timerfd_create (CLOCK_REALTIME, 0);
if (fd < 0)
FAIL_EXIT1 ("*** timerfd_create failed: %m");
/* Set the timer. */
ret = timerfd_settime (fd, 0, &settings, NULL);
if (ret != 0)
FAIL_EXIT1 ("*** timerfd_settime failed: %m\n");
/* Sleep for 1 second. */
ret = usleep (1000000);
if (ret != 0)
FAIL_EXIT1 ("*** usleep failed: %m\n");
/* Read the timer just after sleep. */
ret = timerfd_gettime (fd, &val);
if (ret != 0)
FAIL_EXIT1 ("*** timerfd_gettime failed: %m\n");
/* Check difference between timerfd_gettime calls. */
TEST_COMPARE (support_timespec_check_in_range
((struct timespec) { 1, 0 }, val.it_value, 0.9, 1.0), 1);
xclose (fd);
}
static void
timerfd_large_timeout (void)
{
int fd = timerfd_create (CLOCK_REALTIME, 0);
TEST_VERIFY (fd != -1);
support_create_timer (0, 100000000, false, NULL);
struct itimerspec it = { { 0, 0 }, { TYPE_MAXIMUM (time_t), 0 } };
int r = timerfd_settime (fd, 0, &it, NULL);
if (r == 0)
{
uint64_t buf;
TEST_COMPARE (read (fd, &buf, sizeof (buf)), -1);
TEST_VERIFY (errno == EINTR);
}
else
TEST_COMPARE (errno, EOVERFLOW);
}
static int
do_test (void)
{
timerfd_test ();
timerfd_large_timeout ();
return 0;
}
#include <support/test-driver.c>
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