testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/19-4.c

/*
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2.
 *
 *  This program 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 General Public License for more details.
 *
 *
 * Test that sched_setscheduler() sets errno == EINVAL when
 * the sched_ss_max_repl is not within the inclusive range [1,SS_REPL_MAX]
 *
 * Test the values 0 and SS_REPL_MAX+1.
 *
 * @pt:SS
 */

#include <errno.h>
#include <sched.h>
#include <stdio.h>
#include <unistd.h>
#include "posixtest.h"

#if defined(_POSIX_SPORADIC_SERVER)&&(_POSIX_SPORADIC_SERVER != -1)

int main() {
	int policy, result;
	int result_code = PTS_PASS;
	struct sched_param param;

	if (sched_getparam(0, &param) == -1) {
		perror("An error occurs when calling sched_getparam()");
		return PTS_UNRESOLVED;
	}

	param.sched_priority = sched_get_priority_max(SCHED_SPORADIC);

	/* test when sched_ss_max_repl < 1 */
	param.sched_ss_max_repl = 0;
	result = sched_setscheduler(0, SCHED_SPORADIC, &param);

	if (result != -1) {
		printf("The returned code is not -1 when sched_ss_max_repl < 1.\n");
		result_code = PTS_FAIL;
	} else if (errno == EPERM) {
		printf("This process does not have the permission to set its own scheduling policy.\nTry to launch this test as root.\n");
		result_code = PTS_UNRESOLVED;
	} else if (errno != EINVAL) {
		perror("Unknow error when testing sched_ss_max_repl < 1");
		result_code = PTS_FAIL;
	}

	/* test when sched_ss_max_repl > SS_REPL_MAX */
	param.sched_ss_max_repl = SS_REPL_MAX+1;
	result = sched_setscheduler(0, SCHED_SPORADIC, &param);

	if (result == -1 && errno == EINVAL) {
		if (result_code == PTS_PASS) {
			printf("Test PASSED\n");
		}
		return result_code;
	} else if (result != -1) {
		printf("The returned code is not -1 when sched_ss_max_repl > SS_REPL_MAX.\n");
		return PTS_FAIL;
	} else if (errno == EPERM) {
		if (result_code == PTS_FAIL) {
			printf("This process does not have the permission to set its own scheduling parameter.\nTry to launch this test as root.\n");
			return PTS_FAIL;
		}
		return PTS_UNRESOLVED;
	} else {
		perror("Unknow error when testing sched_ss_max_repl > SS_REPL_MAX");
		return PTS_FAIL;
	}

}
#else
int main()
{
	printf("Does not support SS (SPORADIC SERVER)\n");
	return PTS_UNSUPPORTED;
}

#endif