posix_sig.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 1994 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* posix signal package
*/
#include <stdio.h>
#include <signal.h>
#include <errno.h>
#define cantmask (sigmask(SIGKILL)|sigmask(SIGSTOP))
extern errno;
/*
* sigemptyset - all known signals
*/
sigemptyset(sigp)
sigset_t *sigp;
{
if (!sigp)
return errno = EINVAL, -1;
*sigp = 0;
return 0;
}
/*
* sigfillset - all known signals
*/
sigfillset(sigp)
sigset_t *sigp;
{
if (!sigp)
return errno = EINVAL, -1;
*sigp = sigmask(NSIG - 1) | (sigmask(NSIG - 1) - 1);
return 0;
}
/*
* add the signal to the set
*/
sigaddset(sigp,signo)
sigset_t* sigp;
{
if (!sigp || signo <= 0 || signo >= NSIG)
return errno = EINVAL, -1;
*sigp |= sigmask(signo);
return 0;
}
/*
* remove the signal from the set
*/
sigdelset(sigp,signo)
sigset_t* sigp;
{
if (!sigp || signo <= 0 || signo >= NSIG)
return errno = EINVAL, -1;
*sigp &= ~sigmask(signo);
return 0;
}
/*
* return true if the signal is in the set (return is 0 or 1)
*/
sigismember(sigp,signo)
sigset_t* sigp;
{
if (!sigp || signo <= 0 || signo >= NSIG)
return errno = EINVAL, -1;
return (*sigp & sigmask(signo)) != 0;
}