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 2, or (at your option) 11 * 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; see the file COPYING. If not, write to 20 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 21 * Boston, MA 02110-1301, USA. 22 */ 23#include <signal.h> 24#include <errno.h> 25 26int 27sigaction(int _sig, const struct sigaction *_act, struct sigaction *_oact) 28{ 29 int retval = 0; 30 31 if (_oact) 32 { 33 void (*installed_sig)(int) = signal (_sig, SIG_IGN); 34 35 /* FIXME */ 36 if (installed_sig == SIG_ERR) 37 { 38 retval = -1; 39 errno = EINVAL; 40 } 41 else 42 signal (_sig, installed_sig); 43 _oact->sa_handler = installed_sig; 44 retval = sigemptyset (&_oact->sa_mask); 45 _oact->sa_flags = 0; 46 } 47 if (_act) 48 { 49 if (signal (_sig, _act->sa_handler) == SIG_ERR) 50 { 51 retval = -1; 52 errno = EINVAL; 53 } 54 } 55 return 0; 56} 57 58 59 60/* arch-tag: 39526405-3d3a-44fe-af28-82a515e0c8e8 61 (do not change this comment) */ 62