1 | /* Check that sigwait does not fail with EINTR (bug 22478). |
2 | Copyright (C) 2017-2022 Free Software Foundation, Inc. |
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 | <https://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 (requested_time: &delay, NULL) != 0) |
44 | FAIL_EXIT1 ("nanosleep: %m" ); |
45 | if (kill (pid: getppid (), SIGUSR1) != 0) |
46 | FAIL_EXIT1 ("kill (SIGUSR1): %m" ); |
47 | if (nanosleep (requested_time: &delay, NULL) != 0) |
48 | FAIL_EXIT1 ("nanosleep: %m" ); |
49 | if (kill (pid: 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, handler: 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, set: &sigs, NULL) != 0) |
66 | FAIL_EXIT1 ("sigprocmask (SIGBLOCK, SIGUSR2): %m" ); |
67 | pid_t pid = signal_sender (); |
68 | int signo = 0; |
69 | int ret = sigwait (set: &sigs, sig: &signo); |
70 | if (ret != 0) |
71 | { |
72 | support_record_failure (); |
73 | errno = ret; |
74 | printf (format: "error: sigwait failed: %m (%d)\n" , ret); |
75 | } |
76 | TEST_VERIFY (signo == SIGUSR2); |
77 | |
78 | int status; |
79 | xwaitpid (pid, status: &status, flags: 0); |
80 | TEST_VERIFY (status == 0); |
81 | |
82 | return 0; |
83 | } |
84 | |
85 | #include <support/test-driver.c> |
86 | |