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/*
* Check decoding of ERESTARTSYS error code.
*
* Copyright (c) 2016-2021 Dmitry V. Levin <ldv@strace.io>
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include <signal.h>
#include <stdio.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <unistd.h>
static int sv[2];
static void
handler(int sig)
{
close(sv[1]);
sv[1] = -1;
}
int
main(void)
{
if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv))
perror_msg_and_skip("socketpair");
const struct sigaction act = {
.sa_handler = handler,
.sa_flags = SA_RESTART
};
if (sigaction(SIGALRM, &act, NULL))
perror_msg_and_fail("sigaction");
sigset_t mask;
sigemptyset(&mask);
sigaddset(&mask, SIGALRM);
if (sigprocmask(SIG_UNBLOCK, &mask, NULL))
perror_msg_and_fail("sigprocmask");
const struct itimerval itv = { .it_value.tv_usec = 123456 };
if (setitimer(ITIMER_REAL, &itv, NULL))
perror_msg_and_fail("setitimer");
if (recvfrom(sv[0], &sv[1], sizeof(sv[1]), 0, NULL, NULL))
perror_msg_and_fail("recvfrom");
printf("recvfrom(%d, %p, %d, 0, NULL, NULL) = ? ERESTARTSYS"
" (To be restarted if SA_RESTART is set)\n",
sv[0], &sv[1], (int) sizeof(sv[1]));
printf("recvfrom(%d, \"\", %d, 0, NULL, NULL) = 0\n",
sv[0], (int) sizeof(sv[1]));
puts("+++ exited with 0 +++");
return 0;
}
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