1 /* Copyright (C) 1991-2022 Free Software Foundation, Inc. 2 This file is part of the GNU C Library. 3 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. 8 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. 13 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/>. */ 17 18 #include <errno.h> 19 #include <signal.h> 20 #include <sigsetops.h> 21 #include <internal-signals.h> 22 23 /* Add SIGNO to SET. */ 24 int sigaddset(sigset_t * set,int signo)25sigaddset (sigset_t *set, int signo) 26 { 27 if (set == NULL || signo <= 0 || signo >= NSIG 28 || is_internal_signal (signo)) 29 { 30 __set_errno (EINVAL); 31 return -1; 32 } 33 34 __sigaddset (set, signo); 35 return 0; 36 } 37 libc_hidden_def (sigaddset) 38