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/* Copyright (C) 1991, 1992, 1995, 1996, 1997 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 <stddef.h>
#include <signal.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 (how, set, oset)
int how;
const sigset_t *set;
sigset_t *oset;
{
int mask;
if (set != NULL)
{
mask = *set;
switch (how)
{
case SIG_BLOCK:
mask = __sigblock (mask);
break;
case SIG_UNBLOCK:
mask = __sigblock (0) & ~mask;
/* Fall through. */
case SIG_SETMASK:
mask = __sigsetmask (mask);
break;
default:
__set_errno (EINVAL);
return -1;
}
}
else
mask = __sigblock (0);
if (oset != NULL)
*oset = mask;
return 0;
}
weak_alias (__sigprocmask, sigprocmask)
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