1 /*
2 * Check decoding of ERESTARTSYS error code.
3 *
4 * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #include "tests.h"
31
32 #include <signal.h>
33 #include <stdio.h>
34 #include <sys/time.h>
35 #include <sys/socket.h>
36 #include <unistd.h>
37
38 static int sv[2];
39
40 static void
handler(int sig)41 handler(int sig)
42 {
43 close(sv[1]);
44 sv[1] = -1;
45 }
46
47 int
main(void)48 main(void)
49 {
50 if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv))
51 perror_msg_and_skip("socketpair");
52
53 const struct sigaction act = {
54 .sa_handler = handler,
55 .sa_flags = SA_RESTART
56 };
57 if (sigaction(SIGALRM, &act, NULL))
58 perror_msg_and_fail("sigaction");
59
60 sigset_t mask;
61 sigemptyset(&mask);
62 sigaddset(&mask, SIGALRM);
63 if (sigprocmask(SIG_UNBLOCK, &mask, NULL))
64 perror_msg_and_fail("sigprocmask");
65
66 const struct itimerval itv = { .it_value.tv_usec = 123456 };
67 if (setitimer(ITIMER_REAL, &itv, NULL))
68 perror_msg_and_fail("setitimer");
69
70 if (recvfrom(sv[0], &sv[1], sizeof(sv[1]), 0, NULL, NULL))
71 perror_msg_and_fail("recvfrom");
72
73 printf("recvfrom(%d, %p, %d, 0, NULL, NULL) = ? ERESTARTSYS"
74 " (To be restarted if SA_RESTART is set)\n",
75 sv[0], &sv[1], (int) sizeof(sv[1]));
76 printf("recvfrom(%d, \"\", %d, 0, NULL, NULL) = 0\n",
77 sv[0], (int) sizeof(sv[1]));
78
79 puts("+++ exited with 0 +++");
80 return 0;
81 }
82