/*
 * Copyright (c) 1982, 1986, 1989 Regents of the University of California.
 * All rights reserved.
 *
 * %sccs.include.redist.c%
 *
 *	from: @(#)kern_acct.c	7.18 (Berkeley) 5/11/91
 */

#include "param.h"
#include "systm.h"
#include "namei.h"
#include "resourcevar.h"
#include "proc.h"
#include "ioctl.h"
#include "termios.h"
#include "tty.h"
#include "vnode.h"
#include "mount.h"
#include "kernel.h"
#include "file.h"
#include "acct.h"
#include "syslog.h"

/*
 * Values associated with enabling and disabling accounting
 */
int	acctsuspend = 2;	/* stop accounting when < 2% free space left */
int	acctresume = 4;		/* resume when free space risen to > 4% */
struct	timeval chk = { 15, 0 };/* frequency to check space for accounting */

/*
 * Enable or disable process accounting.
 *
 * If a non-null filename is given, that file is used to store accounting
 * records on process exit. If a null filename is given process accounting
 * is suspended. If accounting is enabled, the system checks the amount
 * of freespace on the filesystem at timeval intervals. If the amount of
 * freespace is below acctsuspend percent, accounting is suspended. If
 * accounting has been suspended, and freespace rises above acctresume,
 * accounting is resumed.
 */
/* ARGSUSED */
sysacct(p, uap, retval)
	struct proc *p;
	struct args {
		char	*fname;
	} *uap;
	int *retval;
{

	/*
	 * Body deleted.
	 */
	return (ENOSYS);
}

/*
 * Periodically check the file system to see if accounting
 * should be turned on or off.
 */
acctwatch(resettime)
	struct timeval *resettime;
{
	struct statfs sb;

	if (savacctp) {
		(void)VFS_STATFS(savacctp->v_mount, &sb, (struct proc *)0);
		if (sb.f_bavail > acctresume * sb.f_blocks / 100) {
			acctp = savacctp;
			savacctp = NULL;
			log(LOG_NOTICE, "Accounting resumed\n");
			return;
		}
	}
	if (acctp == NULL)
		return;
	(void)VFS_STATFS(acctp->v_mount, &sb, (struct proc *)0);
	if (sb.f_bavail <= acctsuspend * sb.f_blocks / 100) {
		savacctp = acctp;
		acctp = NULL;
		log(LOG_NOTICE, "Accounting suspended\n");
	}
	timeout(acctwatch, (caddr_t)resettime, hzto(resettime));
}

/*
 * This routine calculates an accounting record for a process and,
 * if accounting is enabled, writes it to the accounting file.
 */
acct(p)
	register struct proc *p;
{

	/*
	 * Body deleted.
	 */
	return;
}