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/* Copyright (C) 1992-2020 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, see
<https://www.gnu.org/licenses/>. */
#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
sigstack (struct sigstack *ss, struct sigstack *oss)
{
stack_t 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 & SS_ONSTACK;
}
return 0;
}
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