mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-06 05:10:05 +00:00
55 lines
1.8 KiB
C
55 lines
1.8 KiB
C
/* BSD-like signal function.
|
|
Copyright (C) 1991, 1992, 1996, 1997, 2000 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public License as
|
|
published by the Free Software Foundation; either version 2 of the
|
|
License, or (at your option) any later version.
|
|
|
|
The GNU C Library 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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#include <errno.h>
|
|
#include <signal.h>
|
|
|
|
|
|
sigset_t _sigintr; /* Set by siginterrupt. */
|
|
|
|
/* Set the handler for the signal SIG to HANDLER,
|
|
returning the old handler, or SIG_ERR on error. */
|
|
__sighandler_t
|
|
__bsd_signal (sig, handler)
|
|
int sig;
|
|
__sighandler_t handler;
|
|
{
|
|
struct sigaction act, oact;
|
|
|
|
/* Check signal extents to protect __sigismember. */
|
|
if (handler == SIG_ERR || sig < 1 || sig >= NSIG)
|
|
{
|
|
__set_errno (EINVAL);
|
|
return SIG_ERR;
|
|
}
|
|
|
|
act.sa_handler = handler;
|
|
if (__sigemptyset (&act.sa_mask) < 0
|
|
|| __sigaddset (&act.sa_mask, sig) < 0)
|
|
return SIG_ERR;
|
|
act.sa_flags = __sigismember (&_sigintr, sig) ? 0 : SA_RESTART;
|
|
if (__sigaction (sig, &act, &oact) < 0)
|
|
return SIG_ERR;
|
|
|
|
return oact.sa_handler;
|
|
}
|
|
weak_alias (__bsd_signal, bsd_signal)
|
|
weak_alias (__bsd_signal, signal)
|
|
weak_alias (__bsd_signal, ssignal)
|