xref: /titanic_51/usr/src/lib/libbc/libc/compat/4.1/vtimes.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"

#include <sys/time.h>
#include <sys/resource.h>

/*
 * Backwards compatible vtimes.
 */
struct vtimes {
	int	vm_utime;		/* user time (60'ths) */
	int	vm_stime;		/* system time (60'ths) */
	/* divide next two by utime+stime to get averages */
	unsigned vm_idsrss;		/* integral of d+s rss */
	unsigned vm_ixrss;		/* integral of text rss */
	int	vm_maxrss;		/* maximum rss */
	int	vm_majflt;		/* major page faults */
	int	vm_minflt;		/* minor page faults */
	int	vm_nswap;		/* number of swaps */
	int	vm_inblk;		/* block reads */
	int	vm_oublk;		/* block writes */
};

static void	getvtimes(struct rusage *, struct vtimes *);
static int	scale60(struct timeval *);

int
vtimes(struct vtimes *par, struct vtimes *chi)
{
	struct rusage ru;

	if (par) {
		if (getrusage(RUSAGE_SELF, &ru) < 0)
			return (-1);
		getvtimes(&ru, par);
	}
	if (chi) {
		if (getrusage(RUSAGE_CHILDREN, &ru) < 0)
			return (-1);
		getvtimes(&ru, chi);
	}
	return (0);
}

static void
getvtimes(struct rusage *aru, struct vtimes *avt)
{

	avt->vm_utime = scale60(&aru->ru_utime);
	avt->vm_stime = scale60(&aru->ru_stime);
	avt->vm_idsrss = ((aru->ru_idrss+aru->ru_isrss) / 100) * 60;
	avt->vm_ixrss = aru->ru_ixrss / 100 * 60;
	avt->vm_maxrss = aru->ru_maxrss;
	avt->vm_majflt = aru->ru_majflt;
	avt->vm_minflt = aru->ru_minflt;
	avt->vm_nswap = aru->ru_nswap;
	avt->vm_inblk = aru->ru_inblock;
	avt->vm_oublk = aru->ru_oublock;
}

static int
scale60(struct timeval *tvp)
{

	return (tvp->tv_sec * 60 + tvp->tv_usec / 16667);
}