mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-06 05:10:05 +00:00
41bdb6e20c
2001-07-06 Paul Eggert <eggert@twinsun.com> * manual/argp.texi: Remove ignored LGPL copyright notice; it's not appropriate for documentation anyway. * manual/libc-texinfo.sh: "Library General Public License" -> "Lesser General Public License". 2001-07-06 Andreas Jaeger <aj@suse.de> * All files under GPL/LGPL version 2: Place under LGPL version 2.1.
82 lines
2.2 KiB
C
82 lines
2.2 KiB
C
/* Copyright (C) 1998, 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 Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#include <errno.h>
|
|
#define __need_NULL
|
|
#include <stddef.h>
|
|
#include <signal.h>
|
|
|
|
|
|
/* Set the disposition for SIG. */
|
|
__sighandler_t
|
|
sigset (sig, disp)
|
|
int sig;
|
|
__sighandler_t disp;
|
|
{
|
|
struct sigaction act, oact;
|
|
sigset_t set;
|
|
|
|
#ifdef SIG_HOLD
|
|
/* Handle SIG_HOLD first. */
|
|
if (disp == SIG_HOLD)
|
|
{
|
|
/* Create an empty signal set. */
|
|
if (__sigemptyset (&set) < 0)
|
|
return SIG_ERR;
|
|
|
|
/* Add the specified signal. */
|
|
if (__sigaddset (&set, sig) < 0)
|
|
return SIG_ERR;
|
|
|
|
/* Add the signal set to the current signal mask. */
|
|
if (__sigprocmask (SIG_BLOCK, &set, NULL) < 0)
|
|
return SIG_ERR;
|
|
|
|
return SIG_HOLD;
|
|
}
|
|
#endif /* SIG_HOLD */
|
|
|
|
/* Check signal extents to protect __sigismember. */
|
|
if (disp == SIG_ERR || sig < 1 || sig >= NSIG)
|
|
{
|
|
__set_errno (EINVAL);
|
|
return SIG_ERR;
|
|
}
|
|
|
|
act.sa_handler = disp;
|
|
if (__sigemptyset (&act.sa_mask) < 0)
|
|
return SIG_ERR;
|
|
act.sa_flags = 0;
|
|
if (__sigaction (sig, &act, &oact) < 0)
|
|
return SIG_ERR;
|
|
|
|
/* Create an empty signal set. */
|
|
if (__sigemptyset (&set) < 0)
|
|
return SIG_ERR;
|
|
|
|
/* Add the specified signal. */
|
|
if (__sigaddset (&set, sig) < 0)
|
|
return SIG_ERR;
|
|
|
|
/* Remove the signal set from the current signal mask. */
|
|
if (__sigprocmask (SIG_UNBLOCK, &set, NULL) < 0)
|
|
return SIG_ERR;
|
|
|
|
return oact.sa_handler;
|
|
}
|