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/* Basic tests for Linux epoll ioctls.
Copyright (C) 2022-2024 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 <intprops.h>
#include <stdlib.h>
#include <string.h>
#include <support/check.h>
#include <support/process_state.h>
#include <support/support.h>
#include <support/test-driver.h>
#include <support/xsignal.h>
#include <support/xunistd.h>
#include <sys/ioctl.h>
#include <sys/epoll.h>
static void
test_epoll_ioctl (void)
{
int efd = epoll_create1 (0);
TEST_VERIFY_EXIT (efd != -1);
struct epoll_params params;
TEST_COMPARE (ioctl (efd, EPIOCGPARAMS, ¶ms), 0);
/* parameters are all 0 by default */
TEST_COMPARE (params.busy_poll_usecs, 0);
TEST_COMPARE (params.busy_poll_budget, 0);
TEST_COMPARE (params.prefer_busy_poll, 0);
TEST_COMPARE (params.__pad, 0);
/* set custom parameters */
params.busy_poll_usecs = 40;
params.busy_poll_budget = 8;
params.prefer_busy_poll = 1;
params.__pad = 0;
TEST_COMPARE (ioctl (efd, EPIOCSPARAMS, ¶ms), 0);
memset (¶ms, 0, sizeof (params));
TEST_COMPARE (ioctl (efd, EPIOCGPARAMS, ¶ms), 0);
/* check custom values were retrieved after being set */
TEST_COMPARE (params.busy_poll_usecs, 40);
TEST_COMPARE (params.busy_poll_budget, 8);
TEST_COMPARE (params.prefer_busy_poll, 1);
TEST_COMPARE (params.__pad, 0);
xclose (efd);
}
static bool
ioctl_supported (void)
{
int efd = epoll_create1 (0);
TEST_VERIFY_EXIT (efd != -1);
struct epoll_params params;
int r = ioctl (efd, EPIOCGPARAMS, ¶ms);
xclose (efd);
return (r == 0);
}
static int
do_test (void)
{
if (ioctl_supported ())
test_epoll_ioctl ();
else
return EXIT_UNSUPPORTED;
return 0;
}
#include <support/test-driver.c>
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