mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-11-29 07:58:28 +00:00
58 lines
1.4 KiB
C
58 lines
1.4 KiB
C
/* sigaction.c
|
|
*
|
|
* Copyright (C) 1995 DJ Delorie
|
|
*
|
|
* (See the README file in this directory for the copyright and license
|
|
* history of this file.)
|
|
*
|
|
* This file is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This file 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this file. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
#include <signal.h>
|
|
#include <errno.h>
|
|
|
|
int
|
|
sigaction(int _sig, const struct sigaction *_act, struct sigaction *_oact)
|
|
{
|
|
int retval = 0;
|
|
|
|
if (_oact)
|
|
{
|
|
void (*installed_sig)(int) = signal (_sig, SIG_IGN);
|
|
|
|
/* FIXME */
|
|
if (installed_sig == SIG_ERR)
|
|
{
|
|
retval = -1;
|
|
errno = EINVAL;
|
|
}
|
|
else
|
|
signal (_sig, installed_sig);
|
|
_oact->sa_handler = installed_sig;
|
|
retval = sigemptyset (&_oact->sa_mask);
|
|
_oact->sa_flags = 0;
|
|
}
|
|
if (_act)
|
|
{
|
|
if (signal (_sig, _act->sa_handler) == SIG_ERR)
|
|
{
|
|
retval = -1;
|
|
errno = EINVAL;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
|