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/* Copyright (C) 1991-2017 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
<http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <signal.h>
#include <hurd.h>
#include <hurd/signal.h>
#include <hurd/msg.h>
/* If SET is not NULL, modify the current set of blocked signals
according to HOW, which may be SIG_BLOCK, SIG_UNBLOCK or SIG_SETMASK.
If OSET is not NULL, store the old set of blocked signals in *OSET. */
int
__sigprocmask (int how, const sigset_t *set, sigset_t *oset)
{
struct hurd_sigstate *ss;
sigset_t old, new;
sigset_t pending;
if (set != NULL)
new = *set;
ss = _hurd_self_sigstate ();
__spin_lock (&ss->lock);
old = ss->blocked;
if (set != NULL)
{
switch (how)
{
case SIG_BLOCK:
__sigorset (&ss->blocked, &ss->blocked, &new);
break;
case SIG_UNBLOCK:
ss->blocked &= ~new;
break;
case SIG_SETMASK:
ss->blocked = new;
break;
default:
__spin_unlock (&ss->lock);
errno = EINVAL;
return -1;
}
ss->blocked &= ~_SIG_CANT_MASK;
}
pending = ss->pending & ~ss->blocked;
__spin_unlock (&ss->lock);
if (oset != NULL)
*oset = old;
if (pending)
/* Send a message to the signal thread so it
will wake up and check for pending signals. */
__msg_sig_post (_hurd_msgport, 0, 0, __mach_task_self ());
return 0;
}
libc_hidden_def (__sigprocmask)
weak_alias (__sigprocmask, sigprocmask)
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