/* Copyright (C) 2003 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2003. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ #include <pthread.h> #include <signal.h> #include <unistd.h> static int the_sig; static void eintr_handler (int sig) { if (sig != the_sig) { write (STDOUT_FILENO, "eintr_handler: signal number wrong\n", 35); _exit (1); } write (STDOUT_FILENO, ".", 1); } static void * eintr_source (void *arg) { struct timespec ts = { .tv_sec = 0, .tv_nsec = 500000 }; if (arg == NULL) { sigset_t ss; sigemptyset (&ss); sigaddset (&ss, the_sig); pthread_sigmask (SIG_BLOCK, &ss, NULL); } while (1) { if (arg != NULL) pthread_kill (*(pthread_t *) arg, the_sig); else kill (getpid (), the_sig); nanosleep (&ts, NULL); } /* NOTREACHED */ return NULL; } static void setup_eintr (int sig, pthread_t *thp) { struct sigaction sa; sigemptyset (&sa.sa_mask); sa.sa_flags = 0; sa.sa_handler = eintr_handler; if (sigaction (sig, &sa, NULL) != 0) { puts ("setup_eintr: sigaction failed"); exit (1); } the_sig = sig; /* Create the thread which will fire off the signals. */ pthread_t th; if (pthread_create (&th, NULL, eintr_source, thp) != 0) { puts ("setup_eintr: pthread_create failed"); exit (1); } }