alarm.c revision 5d54f3d8999eac1762fe0a8c7177d20f1f201fae
/*
* 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 1990 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* Backwards compatible alarm.
*/
#include <sys/time.h>
unsigned int
alarm(unsigned int secs)
{
struct itimerval it, oitv;
struct itimerval *itp = &it;
timerclear(&itp->it_interval);
itp->it_value.tv_sec = secs;
itp->it_value.tv_usec = 0;
if (setitimer(ITIMER_REAL, itp, &oitv) < 0)
return (-1);
if (oitv.it_value.tv_usec)
oitv.it_value.tv_sec++;
return (oitv.it_value.tv_sec);
}