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/* 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;
}
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