/*
 * Copyright (c) 2023 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <signal.h>
#include <errno.h>

extern int __libc_sigaction(int sig, const struct sigaction *restrict sa, struct sigaction *restrict old);

int siginterrupt(int sig, int flag)
{
	if (sig-32U < 3 || sig-1U >= _NSIG-1) {
		errno = EINVAL;
		return -1;
	}
	struct sigaction sa;

	__libc_sigaction(sig, 0, &sa);
	if (flag) sa.sa_flags &= ~SA_RESTART;
	else sa.sa_flags |= SA_RESTART;

	return __libc_sigaction(sig, &sa, 0);
}