| /* Add SIG to the calling process' signal mask. |
| Copyright (C) 1998-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998. |
| |
| The GNU C Library 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. |
| |
| The GNU C Library 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 the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #define __need_NULL |
| #include <stddef.h> |
| #include <signal.h> |
| |
| int |
| sighold (int sig) |
| { |
| sigset_t set; |
| |
| sigemptyset (&set); |
| if (sigaddset (&set, sig) < 0) |
| return -1; |
| return __sigprocmask (SIG_BLOCK, &set, NULL); |
| } |
