| 1 | /* sigaction.c |
| 2 | * |
| 3 | * Copyright (C) 1995 DJ Delorie |
| 4 | * |
| 5 | * (See the README file in this directory for the copyright and license |
| 6 | * history of this file.) |
| 7 | * |
| 8 | * This file is free software: you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation, either version 3 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This file is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this file. If not, see <http://www.gnu.org/licenses/>. |
| 20 | */ |
| 21 | #include <signal.h> |
| 22 | #include <errno.h> |
| 23 | |
| 24 | int |
| 25 | sigaction(int _sig, const struct sigaction *_act, struct sigaction *_oact) |
| 26 | { |
| 27 | int retval = 0; |
| 28 | |
| 29 | if (_oact) |
| 30 | { |
| 31 | void (*installed_sig)(int) = signal (_sig, SIG_IGN); |
| 32 | |
| 33 | /* FIXME */ |
| 34 | if (installed_sig == SIG_ERR) |
| 35 | { |
| 36 | retval = -1; |
| 37 | errno = EINVAL; |
| 38 | } |
| 39 | else |
| 40 | signal (_sig, installed_sig); |
| 41 | _oact->sa_handler = installed_sig; |
| 42 | retval = sigemptyset (&_oact->sa_mask); |
| 43 | _oact->sa_flags = 0; |
| 44 | } |
| 45 | if (_act) |
| 46 | { |
| 47 | if (signal (_sig, _act->sa_handler) == SIG_ERR) |
| 48 | { |
| 49 | retval = -1; |
| 50 | errno = EINVAL; |
| 51 | } |
| 52 | } |
| 53 | return 0; |
| 54 | } |
| 55 | |
| 56 | |
| 57 | |