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/* Test for select timeout.
Copyright (C) 2021 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 <time.h>
#include <errno.h>
#include <stdbool.h>
#include <sys/select.h>
#include <support/check.h>
#include <support/xtime.h>
#include <support/timespec.h>
#define TST_SELECT_TIMEOUT 1
#define TST_SELECT_FD_ERR 2
static int
test_select_timeout (bool zero_tmo)
{
const int fds = TST_SELECT_FD_ERR;
int timeout = TST_SELECT_TIMEOUT;
struct timeval to = { 0, 0 };
struct timespec ts;
fd_set rfds;
FD_ZERO (&rfds);
FD_SET (fds, &rfds);
if (zero_tmo)
timeout = 0;
to.tv_sec = timeout;
ts = xclock_now (CLOCK_REALTIME);
ts = timespec_add (ts, (struct timespec) { timeout, 0 });
/* Wait for timeout. */
int ret = select (fds + 1, &rfds, NULL, NULL, &to);
if (ret == -1)
FAIL_EXIT1 ("select failed: %m\n");
TEST_TIMESPEC_NOW_OR_AFTER (CLOCK_REALTIME, ts);
return 0;
}
static int
do_test (void)
{
/* Check if select exits immediately. */
test_select_timeout (true);
/* Check if select exits after specified timeout. */
test_select_timeout (false);
return 0;
}
#include <support/test-driver.c>
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