1 /* Copyright (C) 2003-2022 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18 #include <pthread.h>
19 #include <signal.h>
20 #include <unistd.h>
21 #include <support/xthread.h>
22 #include <support/xsignal.h>
23 #include <support/xthread.h>
24
25
26 static int the_sig;
27
28
29 static void
eintr_handler(int sig)30 eintr_handler (int sig)
31 {
32 if (sig != the_sig)
33 {
34 write (STDOUT_FILENO, "eintr_handler: signal number wrong\n", 35);
35 _exit (1);
36 }
37 write (STDOUT_FILENO, ".", 1);
38 }
39
40
41 static void *
eintr_source(void * arg)42 eintr_source (void *arg)
43 {
44 struct timespec ts = { .tv_sec = 0, .tv_nsec = 500000 };
45
46 if (arg == NULL)
47 {
48 sigset_t ss;
49 sigemptyset (&ss);
50 sigaddset (&ss, the_sig);
51 xpthread_sigmask (SIG_BLOCK, &ss, NULL);
52 }
53
54 while (1)
55 {
56 if (arg != NULL)
57 pthread_kill (*(pthread_t *) arg, the_sig);
58 else
59 kill (getpid (), the_sig);
60
61 nanosleep (&ts, NULL);
62 }
63
64 /* NOTREACHED */
65 return NULL;
66 }
67
68
69 static void
setup_eintr(int sig,pthread_t * thp)70 setup_eintr (int sig, pthread_t *thp)
71 {
72 struct sigaction sa;
73 sigemptyset (&sa.sa_mask);
74 sa.sa_flags = 0;
75 sa.sa_handler = eintr_handler;
76 if (sigaction (sig, &sa, NULL) != 0)
77 {
78 puts ("setup_eintr: sigaction failed");
79 exit (1);
80 }
81 the_sig = sig;
82
83 /* Create the thread which will fire off the signals. */
84 xpthread_create (NULL, eintr_source, thp);
85 }
86