1 /* Copyright (C) 2003-2023 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
37 sigemptyset (&sa.sa_mask);
39 if (sigaction (SIGUSR1, &sa, NULL) < 0)
41 printf ("sigaction failed: %m\n");
44 if (raise (SIGUSR1) < 0)
46 printf ("first raise failed: %m\n");
49 if (raise (SIGUSR1) < 0)
51 printf ("second raise failed: %m\n");
56 printf ("signal handler not called 2 times\n");