tests/sched_xetattr.c

/*
 * Copyright (c) 2015-2016 Dmitry V. Levin <ldv@altlinux.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "tests.h"
#include <sys/syscall.h>

#if defined __NR_sched_getattr && defined __NR_sched_setattr

# include <inttypes.h>
# include <stdio.h>
# include <unistd.h>

int
main(void)
{
	static union {
		struct {
			uint32_t size;
			uint32_t sched_policy;
			uint64_t sched_flags;
			uint32_t sched_nice;
			uint32_t sched_priority;
			uint64_t sched_runtime;
			uint64_t sched_deadline;
			uint64_t sched_period;
		} attr;
		char buf[256];
	} sched;

	if (syscall(__NR_sched_getattr, 0, &sched, sizeof(sched), 0))
		perror_msg_and_skip("sched_getattr");

	printf("sched_getattr\\(0, \\{size=%u, sched_policy=SCHED_[A-Z]+, sched_flags=%s, sched_nice=%u, sched_priority=%u, sched_runtime=%" PRIu64 ", sched_deadline=%" PRIu64 ", sched_period=%" PRIu64 "\\}, 256, 0\\) += 0\n",
		sched.attr.size,
		sched.attr.sched_flags ? "SCHED_FLAG_RESET_ON_FORK" : "0",
		sched.attr.sched_nice,
		sched.attr.sched_priority,
		sched.attr.sched_runtime,
		sched.attr.sched_deadline,
		sched.attr.sched_period);

	sched.attr.sched_flags |= 1;
	if (syscall(__NR_sched_setattr, 0, &sched, 0))
		perror_msg_and_skip("sched_setattr");

	printf("sched_setattr\\(0, \\{size=%u, sched_policy=SCHED_[A-Z]+, sched_flags=%s, sched_nice=%u, sched_priority=%u, sched_runtime=%" PRIu64 ", sched_deadline=%" PRIu64 ", sched_period=%" PRIu64 "\\}, 0\\) += 0\n",
		sched.attr.size,
		"SCHED_FLAG_RESET_ON_FORK",
		sched.attr.sched_nice,
		sched.attr.sched_priority,
		sched.attr.sched_runtime,
		sched.attr.sched_deadline,
		sched.attr.sched_period);

	return 0;
}

#else

SKIP_MAIN_UNDEFINED("__NR_sched_getattr && __NR_sched_setattr")

#endif