1 /*
2 * Copyright (c) 2016 Linux Test Project
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of
7 * the License, or (at your option) any later version.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * Check that pause() returns on signal with errno == EINTR.
15 */
16 #include <errno.h>
17 #include <signal.h>
18 #include <stdlib.h>
19 #include "tst_test.h"
20
sig_handler(int sig LTP_ATTRIBUTE_UNUSED)21 static void sig_handler(int sig LTP_ATTRIBUTE_UNUSED)
22 {
23 }
24
do_child(void)25 static void do_child(void)
26 {
27 SAFE_SIGNAL(SIGINT, sig_handler);
28
29 TST_CHECKPOINT_WAKE(0);
30
31 TEST(pause());
32 if (TST_RET != -1)
33 tst_res(TFAIL, "pause() succeeded unexpectedly");
34 else if (TST_ERR == EINTR)
35 tst_res(TPASS, "pause() interrupted with EINTR");
36 else
37 tst_res(TFAIL | TTERRNO, "pause() unexpected errno");
38
39 TST_CHECKPOINT_WAKE(0);
40 exit(0);
41 }
42
do_test(void)43 static void do_test(void)
44 {
45 int pid, status;
46
47 pid = SAFE_FORK();
48 if (pid == 0)
49 do_child();
50
51 TST_CHECKPOINT_WAIT(0);
52 TST_PROCESS_STATE_WAIT(pid, 'S');
53 kill(pid, SIGINT);
54
55 /*
56 * TST_CHECKPOINT_WAIT has built-in timeout, if pause() doesn't return,
57 * this checkpoint call will reliably end the test.
58 */
59 TST_CHECKPOINT_WAIT(0);
60 SAFE_WAIT(&status);
61 }
62
63 static struct tst_test test = {
64 .forks_child = 1,
65 .needs_checkpoints = 1,
66 .test_all = do_test,
67 };
68