new copyright notice

[unix-history] / usr / src / lib / libc / gen / alarm.c

/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.
 *
 * %sccs.include.redist.c%
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)alarm.c	5.4 (Berkeley) %G%";
#endif /* LIBC_SCCS and not lint */

/*
 * Backwards compatible alarm.
 */
#include <sys/time.h>

alarm(secs)
	int secs;
{
	struct itimerval it, oitv;
	register 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);
}