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

/*
 * Copyright (c) 1983, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * %sccs.include.redist.c%
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)alarm.c	8.1 (Berkeley) %G%";
#endif /* LIBC_SCCS and not lint */

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

unsigned int
alarm(secs)
	unsigned 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);
}
Commit	Line	Data
b8f253e8	1	/*
74155b62 KB	2	* Copyright (c) 1983, 1993
74155b62 KB	3	* The Regents of the University of California. All rights reserved.
d0286ffa	4	*
269a7923	5	* %sccs.include.redist.c%
b8f253e8 KM	6	*/
b8f253e8 KM	7
2ce81398	8	#if defined(LIBC_SCCS) && !defined(lint)
74155b62	9	static char sccsid[] = "@(#)alarm.c 8.1 (Berkeley) %G%";
d0286ffa	10	#endif /* LIBC_SCCS and not lint */
30e720bf SL	11
	12	/*
	13	* Backwards compatible alarm.
	14	*/
	15	#include <sys/time.h>
c5980113	16	#include <unistd.h>
30e720bf	17
c5980113	18	unsigned int
30e720bf	19	alarm(secs)
c5980113	20	unsigned int secs;
30e720bf SL	21	{
	22	struct itimerval it, oitv;
	23	register struct itimerval *itp = ⁢
	24
	25	timerclear(&itp->it_interval);
	26	itp->it_value.tv_sec = secs;
	27	itp->it_value.tv_usec = 0;
	28	if (setitimer(ITIMER_REAL, itp, &oitv) < 0)
	29	return (-1);
27130bed RC	30	if (oitv.it_value.tv_usec)
27130bed RC	31	oitv.it_value.tv_sec++;
30e720bf SL	32	return (oitv.it_value.tv_sec);
30e720bf SL	33	}