From c5fcd473c6f0a74a6f8d408b0d0f3fc2df02eb1c Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Tue, 26 Jan 2016 22:34:46 +0100 Subject: [PATCH] nss: block various signals while running NSS lookups Let's make sure our poll() calls don't get interrupted where they shouldn't (SIGALRM, ...), but allow them to be interrupted where they should (SIGINT, ...). Fixes #1965 --- src/test/test-signal-util.c | 49 +++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 src/test/test-signal-util.c diff --git a/src/test/test-signal-util.c b/src/test/test-signal-util.c new file mode 100644 index 000000000..82acdd33e --- /dev/null +++ b/src/test/test-signal-util.c @@ -0,0 +1,49 @@ +/*** + This file is part of elogind. + + Copyright 2016 Lennart Poettering + + elogind 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. + + elogind 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 elogind; If not, see . +***/ + +#include "signal-util.h" + +static void test_block_signals(void) { + sigset_t ss; + + assert_se(sigprocmask(0, NULL, &ss) >= 0); + + assert_se(sigismember(&ss, SIGUSR1) == 0); + assert_se(sigismember(&ss, SIGALRM) == 0); + assert_se(sigismember(&ss, SIGVTALRM) == 0); + + { + BLOCK_SIGNALS(SIGUSR1, SIGVTALRM); + + assert_se(sigprocmask(0, NULL, &ss) >= 0); + assert_se(sigismember(&ss, SIGUSR1) == 1); + assert_se(sigismember(&ss, SIGALRM) == 0); + assert_se(sigismember(&ss, SIGVTALRM) == 1); + + } + + assert_se(sigprocmask(0, NULL, &ss) >= 0); + assert_se(sigismember(&ss, SIGUSR1) == 0); + assert_se(sigismember(&ss, SIGALRM) == 0); + assert_se(sigismember(&ss, SIGVTALRM) == 0); +} + +int main(int argc, char *argv[]) { + test_block_signals(); +} -- 2.30.2