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cccb6d4e | 1 | /* Check that sigwait does not fail with EINTR (bug 22478). |
04277e02 | 2 | Copyright (C) 2017-2019 Free Software Foundation, Inc. |
cccb6d4e FW |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
17 | <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #include <errno.h> | |
20 | #include <signal.h> | |
21 | #include <stdio.h> | |
22 | #include <support/check.h> | |
23 | #include <support/xunistd.h> | |
24 | #include <time.h> | |
25 | #include <unistd.h> | |
26 | ||
27 | /* Handler for SIGUSR1. */ | |
28 | static void | |
29 | sigusr1_handler (int signo) | |
30 | { | |
31 | TEST_VERIFY (signo == SIGUSR1); | |
32 | } | |
33 | ||
34 | /* Spawn a subprocess to send two signals: First SIGUSR1, then | |
35 | SIGUSR2. Return the PID of the process. */ | |
36 | static pid_t | |
37 | signal_sender (void) | |
38 | { | |
39 | pid_t pid = xfork (); | |
40 | if (pid == 0) | |
41 | { | |
42 | static const struct timespec delay = { 1, }; | |
43 | if (nanosleep (&delay, NULL) != 0) | |
44 | FAIL_EXIT1 ("nanosleep: %m"); | |
45 | if (kill (getppid (), SIGUSR1) != 0) | |
46 | FAIL_EXIT1 ("kill (SIGUSR1): %m"); | |
47 | if (nanosleep (&delay, NULL) != 0) | |
48 | FAIL_EXIT1 ("nanosleep: %m"); | |
49 | if (kill (getppid (), SIGUSR2) != 0) | |
50 | FAIL_EXIT1 ("kill (SIGUSR2): %m"); | |
51 | _exit (0); | |
52 | } | |
53 | return pid; | |
54 | } | |
55 | ||
56 | static int | |
57 | do_test (void) | |
58 | { | |
59 | if (signal (SIGUSR1, sigusr1_handler) == SIG_ERR) | |
60 | FAIL_EXIT1 ("signal (SIGUSR1): %m\n"); | |
61 | ||
62 | sigset_t sigs; | |
63 | sigemptyset (&sigs); | |
64 | sigaddset (&sigs, SIGUSR2); | |
65 | if (sigprocmask (SIG_BLOCK, &sigs, NULL) != 0) | |
66 | FAIL_EXIT1 ("sigprocmask (SIGBLOCK, SIGUSR2): %m"); | |
67 | pid_t pid = signal_sender (); | |
68 | int signo = 0; | |
69 | int ret = sigwait (&sigs, &signo); | |
70 | if (ret != 0) | |
71 | { | |
72 | support_record_failure (); | |
73 | errno = ret; | |
74 | printf ("error: sigwait failed: %m (%d)\n", ret); | |
75 | } | |
76 | TEST_VERIFY (signo == SIGUSR2); | |
77 | ||
78 | int status; | |
79 | xwaitpid (pid, &status, 0); | |
80 | TEST_VERIFY (status == 0); | |
81 | ||
82 | return 0; | |
83 | } | |
84 | ||
85 | #include <support/test-driver.c> |