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/* Copyright (C) 1991, 1992, 1995 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 <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
DEFUN(__sigprocmask, (how, set, oset),
int how AND CONST sigset_t *set AND 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:
errno = EINVAL;
return -1;
}
}
else
mask = __sigblock(0);
if (oset != NULL)
*oset = mask;
return 0;
}
weak_alias (__sigprocmask, sigprocmask)
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