lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | /* Add SIG to the calling process' signal mask. |
| 2 | Copyright (C) 1998, 2000, 2003 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998. |
| 5 | |
| 6 | The GNU C Library is free software; you can redistribute it and/or |
| 7 | modify it under the terms of the GNU Lesser General Public |
| 8 | License as published by the Free Software Foundation; either |
| 9 | version 2.1 of the License, or (at your option) any later version. |
| 10 | |
| 11 | The GNU C Library is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | Lesser General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU Lesser General Public |
| 17 | License along with the GNU C Library; if not, write to the Free |
| 18 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 19 | 02111-1307 USA. */ |
| 20 | |
| 21 | #define __need_NULL |
| 22 | #include <stddef.h> |
| 23 | #include <signal.h> |
| 24 | |
| 25 | |
| 26 | int sighold (int sig) |
| 27 | { |
| 28 | sigset_t set; |
| 29 | |
| 30 | /* Retrieve current signal set. */ |
| 31 | sigprocmask (SIG_SETMASK, NULL, &set); /* can't fail */ |
| 32 | |
| 33 | /* Bound-check sig, add it to the set. */ |
| 34 | if (sigaddset (&set, sig) < 0) |
| 35 | return -1; |
| 36 | |
| 37 | /* Set the new mask. */ |
| 38 | return sigprocmask (SIG_SETMASK, &set, NULL); |
| 39 | } |