121 lines
3.7 KiB
C
121 lines
3.7 KiB
C
/*-
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* Copyright (c) 1982, 1986, 1989, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)kern_acct.c 8.1 (Berkeley) 6/14/93
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* $Id: kern_acct.c,v 1.3 1994/08/02 07:41:52 davidg Exp $
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/mount.h>
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#include <sys/vnode.h>
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#include <sys/file.h>
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#include <sys/syslog.h>
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#include <sys/kernel.h>
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struct acct_args {
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char *fname;
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};
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int
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acct(a1, a2, a3)
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struct proc *a1;
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struct acct_args *a2;
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int *a3;
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{
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/*
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* Body deleted.
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*/
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return (ENOSYS);
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}
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void
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acct_process(a1)
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struct proc *a1;
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{
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/*
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* Body deleted.
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*/
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return;
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}
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/*
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* Periodically check the file system to see if accounting
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* should be turned on or off.
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*/
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/*
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* Values associated with enabling and disabling accounting
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*/
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int acctsuspend = 2; /* stop accounting when < 2% free space left */
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int acctresume = 4; /* resume when free space risen to > 4% */
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int acctchkfreq = 15; /* frequency (in seconds) to check space */
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/*
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* SHOULD REPLACE THIS WITH A DRIVER THAT CAN BE READ TO SIMPLIFY.
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*/
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struct vnode *acctp;
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struct vnode *savacctp;
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/* ARGSUSED */
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void
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acctwatch(a)
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void *a;
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{
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struct statfs sb;
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if (savacctp) {
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(void)VFS_STATFS(savacctp->v_mount, &sb, (struct proc *)0);
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if (sb.f_bavail > acctresume * sb.f_blocks / 100) {
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acctp = savacctp;
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savacctp = NULL;
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log(LOG_NOTICE, "Accounting resumed\n");
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}
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} else {
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if (acctp == NULL)
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return;
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(void)VFS_STATFS(acctp->v_mount, &sb, (struct proc *)0);
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if (sb.f_bavail <= acctsuspend * sb.f_blocks / 100) {
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savacctp = acctp;
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acctp = NULL;
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log(LOG_NOTICE, "Accounting suspended\n");
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}
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}
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timeout(acctwatch, NULL, acctchkfreq * hz);
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}
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