8750ac0238
Back in 4dffec1459 we stopped using SIGRTMIN+26
and higher on hppa because they were not available. Then they became available
in linux 3.18:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1f25df2eff5b25f52c139d3ff31bc883eee9a0ab
Instead of hard-coding the list based on architecture, let's use a runtime
check like signal(7) says.
(A note about implementation: RTSIG_IF_AVAILABLE is defined to take the full
signal and not just an offset from SIGRTMIN so that it's still possible to
grep for SIGRTMIN\+.)
Add a simple "test" to print the signal values.
Fixes https://bugs.freedesktop.org/show_bug.cgi?id=84931.
82 lines
2.6 KiB
C
82 lines
2.6 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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/***
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This file is part of systemd.
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Copyright 2016 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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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 License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <signal.h>
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#include <unistd.h>
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#include "log.h"
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#include "macro.h"
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#include "signal-util.h"
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#include "process-util.h"
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#define info(sig) log_info(#sig " = " STRINGIFY(sig) " = %d", sig)
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static void test_rt_signals(void) {
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info(SIGRTMIN);
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info(SIGRTMAX);
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/* We use signals SIGRTMIN+0 to SIGRTMIN+24 unconditionally */
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assert(SIGRTMAX - SIGRTMIN >= 24);
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}
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static void test_block_signals(void) {
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sigset_t ss;
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assert_se(sigprocmask(0, NULL, &ss) >= 0);
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assert_se(sigismember(&ss, SIGUSR1) == 0);
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assert_se(sigismember(&ss, SIGALRM) == 0);
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assert_se(sigismember(&ss, SIGVTALRM) == 0);
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{
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BLOCK_SIGNALS(SIGUSR1, SIGVTALRM);
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assert_se(sigprocmask(0, NULL, &ss) >= 0);
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assert_se(sigismember(&ss, SIGUSR1) == 1);
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assert_se(sigismember(&ss, SIGALRM) == 0);
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assert_se(sigismember(&ss, SIGVTALRM) == 1);
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}
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assert_se(sigprocmask(0, NULL, &ss) >= 0);
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assert_se(sigismember(&ss, SIGUSR1) == 0);
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assert_se(sigismember(&ss, SIGALRM) == 0);
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assert_se(sigismember(&ss, SIGVTALRM) == 0);
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}
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static void test_ignore_signals(void) {
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assert_se(ignore_signals(SIGINT, -1) >= 0);
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assert_se(kill(getpid_cached(), SIGINT) >= 0);
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assert_se(ignore_signals(SIGUSR1, SIGUSR2, SIGTERM, SIGPIPE, -1) >= 0);
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assert_se(kill(getpid_cached(), SIGUSR1) >= 0);
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assert_se(kill(getpid_cached(), SIGUSR2) >= 0);
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assert_se(kill(getpid_cached(), SIGTERM) >= 0);
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assert_se(kill(getpid_cached(), SIGPIPE) >= 0);
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assert_se(default_signals(SIGINT, SIGUSR1, SIGUSR2, SIGTERM, SIGPIPE, -1) >= 0);
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}
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int main(int argc, char *argv[]) {
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test_rt_signals();
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test_block_signals();
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test_ignore_signals();
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return 0;
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}
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