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688903eb | 1 | /* Copyright (C) 2003-2018 Free Software Foundation, Inc. |
71028edd UD |
2 | This file is part of the GNU C Library. |
3 | Contributed by Ulrich Drepper <drepper@redhat.com>, 2003. | |
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 | |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
71028edd UD |
18 | |
19 | #include <pthread.h> | |
20 | #include <signal.h> | |
21 | #include <unistd.h> | |
22 | ||
23 | ||
24 | static int the_sig; | |
25 | ||
26 | ||
27 | static void | |
28 | eintr_handler (int sig) | |
29 | { | |
30 | if (sig != the_sig) | |
31 | { | |
32 | write (STDOUT_FILENO, "eintr_handler: signal number wrong\n", 35); | |
33 | _exit (1); | |
34 | } | |
35 | write (STDOUT_FILENO, ".", 1); | |
36 | } | |
37 | ||
38 | ||
39 | static void * | |
40 | eintr_source (void *arg) | |
41 | { | |
42 | struct timespec ts = { .tv_sec = 0, .tv_nsec = 500000 }; | |
43 | ||
33ebea17 UD |
44 | if (arg == NULL) |
45 | { | |
46 | sigset_t ss; | |
47 | sigemptyset (&ss); | |
48 | sigaddset (&ss, the_sig); | |
49 | pthread_sigmask (SIG_BLOCK, &ss, NULL); | |
50 | } | |
51 | ||
71028edd UD |
52 | while (1) |
53 | { | |
4efdd8d3 UD |
54 | if (arg != NULL) |
55 | pthread_kill (*(pthread_t *) arg, the_sig); | |
56 | else | |
57 | kill (getpid (), the_sig); | |
71028edd UD |
58 | |
59 | nanosleep (&ts, NULL); | |
60 | } | |
757f9fcb UD |
61 | |
62 | /* NOTREACHED */ | |
63 | return NULL; | |
71028edd UD |
64 | } |
65 | ||
66 | ||
67 | static void | |
4efdd8d3 | 68 | setup_eintr (int sig, pthread_t *thp) |
71028edd UD |
69 | { |
70 | struct sigaction sa; | |
71 | sigemptyset (&sa.sa_mask); | |
72 | sa.sa_flags = 0; | |
73 | sa.sa_handler = eintr_handler; | |
74 | if (sigaction (sig, &sa, NULL) != 0) | |
75 | { | |
76 | puts ("setup_eintr: sigaction failed"); | |
77 | exit (1); | |
78 | } | |
79 | the_sig = sig; | |
80 | ||
81 | /* Create the thread which will fire off the signals. */ | |
82 | pthread_t th; | |
4efdd8d3 | 83 | if (pthread_create (&th, NULL, eintr_source, thp) != 0) |
71028edd UD |
84 | { |
85 | puts ("setup_eintr: pthread_create failed"); | |
86 | exit (1); | |
87 | } | |
88 | } |