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initial import

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This commit is contained in:
Roland McGrath
1995-02-18 01:27:10 +00:00
commit 28f540f45b
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sysdeps/mach/hurd/sigstack.c Normal file
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/* Copyright (C) 1992 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., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <ansidecl.h>
#include <errno.h>
#include <signal.h>
#include <hurd.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
DEFUN(sigstack, (ss, oss),
CONST struct sigstack *ss AND struct sigstack *oss)
{
struct sigaltstack as, oas;
as.ss_sp = ss->ss_sp;
as.ss_size = 0;
as.ss_flags = 0;
if (sigaltstack (&as, &oas) < 0)
return -1;
if (oss != NULL)
{
oss->ss_sp = oas.ss_sp;
oss->ss_onstack = oas.ss_flags & SA_ONSTACK;
}
return 0;
}