mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-26 23:10:06 +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.
64 lines
1.8 KiB
C
64 lines
1.8 KiB
C
/* Copyright (C) 1992, 93, 94, 95, 97, 98 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>
|
|
#include <hurd.h>
|
|
#include <hurd/signal.h>
|
|
|
|
/* Run signals handlers on the stack specified by SS (if not NULL).
|
|
If OSS is not NULL, it is filled in with the old signal stack status. */
|
|
int
|
|
__sigaltstack (argss, oss)
|
|
const struct sigaltstack *argss;
|
|
struct sigaltstack *oss;
|
|
{
|
|
struct hurd_sigstate *s;
|
|
struct sigaltstack ss, old;
|
|
|
|
/* Fault before taking any locks. */
|
|
if (argss != NULL)
|
|
ss = *argss;
|
|
if (oss != NULL)
|
|
*(volatile struct sigaltstack *) oss = *oss;
|
|
|
|
s = _hurd_self_sigstate ();
|
|
__spin_lock (&s->lock);
|
|
|
|
if (argss != NULL &&
|
|
(ss.ss_flags & SS_DISABLE) && (s->sigaltstack.ss_flags & SS_ONSTACK))
|
|
{
|
|
/* Can't disable a stack that is in use. */
|
|
__spin_unlock (&s->lock);
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
|
|
old = s->sigaltstack;
|
|
|
|
if (argss != NULL)
|
|
s->sigaltstack = ss;
|
|
|
|
__spin_unlock (&s->lock);
|
|
|
|
if (oss != NULL)
|
|
*oss = old;
|
|
|
|
return 0;
|
|
}
|
|
weak_alias(__sigaltstack, sigaltstack)
|