2 * Check that the specified signal number is blocked/unblocked.
4 * Copyright (c) 2017-2018 Dmitry V. Levin <ldv@altlinux.org>
7 * SPDX-License-Identifier: GPL-2.0-or-later
15 main(int ac, char **av)
18 error_msg_and_fail("usage: check_sigblock 0|1 signum");
20 const int block = !!atoi(av[1]);
21 const int signum = atoi(av[2]);
25 if (sigprocmask(SIG_SETMASK, NULL, &mask))
26 perror_msg_and_fail("sigprocmask");
28 return block ^ sigismember(&mask, signum);