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7aec73c406
Fix unused result warnings, detected when _FORTIFY_SOURCE is enabled in glibc. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
88 lines
2.1 KiB
C
88 lines
2.1 KiB
C
/* Copyright (C) 2003-2023 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <pthread.h>
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#include <signal.h>
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#include <unistd.h>
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#include <support/xthread.h>
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#include <support/xsignal.h>
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#include <support/xthread.h>
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static int the_sig;
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static void
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eintr_handler (int sig)
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{
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if (sig != the_sig)
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{
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/* empty if statement avoids warn unused result */
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if (write (STDOUT_FILENO,
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"eintr_handler: signal number wrong\n", 35) < 35) {};
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_exit (1);
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}
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if (write (STDOUT_FILENO, ".", 1)) {/* Avoid warn unused result */};
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}
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static void *
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eintr_source (void *arg)
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{
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struct timespec ts = { .tv_sec = 0, .tv_nsec = 500000 };
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if (arg == NULL)
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{
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sigset_t ss;
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sigemptyset (&ss);
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sigaddset (&ss, the_sig);
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xpthread_sigmask (SIG_BLOCK, &ss, NULL);
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}
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while (1)
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{
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if (arg != NULL)
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pthread_kill (*(pthread_t *) arg, the_sig);
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else
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kill (getpid (), the_sig);
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nanosleep (&ts, NULL);
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}
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/* NOTREACHED */
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return NULL;
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}
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static void
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setup_eintr (int sig, pthread_t *thp)
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{
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struct sigaction sa;
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sigemptyset (&sa.sa_mask);
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sa.sa_flags = 0;
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sa.sa_handler = eintr_handler;
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if (sigaction (sig, &sa, NULL) != 0)
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{
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puts ("setup_eintr: sigaction failed");
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exit (1);
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}
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the_sig = sig;
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/* Create the thread which will fire off the signals. */
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xpthread_create (NULL, eintr_source, thp);
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}
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