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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License, Version 1.0 only
      6  * (the "License").  You may not use this file except in compliance
      7  * with the License.
      8  *
      9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
     10  * or http://www.opensolaris.org/os/licensing.
     11  * See the License for the specific language governing permissions
     12  * and limitations under the License.
     13  *
     14  * When distributing Covered Code, include this CDDL HEADER in each
     15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     16  * If applicable, add the following below this CDDL HEADER, with the
     17  * fields enclosed by brackets "[]" replaced with your own identifying
     18  * information: Portions Copyright [yyyy] [name of copyright owner]
     19  *
     20  * CDDL HEADER END
     21  */
     22 /*
     23  * Copyright 1990 Sun Microsystems, Inc.  All rights reserved.
     24  * Use is subject to license terms.
     25  */
     26 
     27 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     28 
     29 /*
     30  * Backwards compatible alarm.
     31  */
     32 #include <sys/time.h>
     33 
     34 unsigned int
     35 alarm(unsigned int secs)
     36 {
     37 	struct itimerval it, oitv;
     38 	struct itimerval *itp = &it;
     39 
     40 	timerclear(&itp->it_interval);
     41 	itp->it_value.tv_sec = secs;
     42 	itp->it_value.tv_usec = 0;
     43 	if (setitimer(ITIMER_REAL, itp, &oitv) < 0)
     44 		return (-1);
     45 	if (oitv.it_value.tv_usec)
     46 		oitv.it_value.tv_sec++;
     47 	return (oitv.it_value.tv_sec);
     48 }
     49