| 1 | /* |
| 2 | * Copyright (c) 1982, 1986, 1989 Regents of the University of California. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * 3. All advertising materials mentioning features or use of this software |
| 14 | * must display the following acknowledgement: |
| 15 | * This product includes software developed by the University of |
| 16 | * California, Berkeley and its contributors. |
| 17 | * 4. Neither the name of the University nor the names of its contributors |
| 18 | * may be used to endorse or promote products derived from this software |
| 19 | * without specific prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 31 | * SUCH DAMAGE. |
| 32 | * |
| 33 | * from: @(#)kern_acct.c 7.18 (Berkeley) 5/11/91 |
| 34 | */ |
| 35 | |
| 36 | #include "param.h" |
| 37 | #include "systm.h" |
| 38 | #include "namei.h" |
| 39 | #include "resourcevar.h" |
| 40 | #include "proc.h" |
| 41 | #include "ioctl.h" |
| 42 | #include "termios.h" |
| 43 | #include "tty.h" |
| 44 | #include "vnode.h" |
| 45 | #include "mount.h" |
| 46 | #include "kernel.h" |
| 47 | #include "file.h" |
| 48 | #include "acct.h" |
| 49 | #include "syslog.h" |
| 50 | |
| 51 | /* |
| 52 | * Values associated with enabling and disabling accounting |
| 53 | */ |
| 54 | int acctsuspend = 2; /* stop accounting when < 2% free space left */ |
| 55 | int acctresume = 4; /* resume when free space risen to > 4% */ |
| 56 | struct timeval chk = { 15, 0 };/* frequency to check space for accounting */ |
| 57 | struct vnode *acctp; /* file to which to do accounting */ |
| 58 | struct vnode *savacctp; /* file to which to do accounting when space */ |
| 59 | |
| 60 | /* |
| 61 | * Enable or disable process accounting. |
| 62 | * |
| 63 | * If a non-null filename is given, that file is used to store accounting |
| 64 | * records on process exit. If a null filename is given process accounting |
| 65 | * is suspended. If accounting is enabled, the system checks the amount |
| 66 | * of freespace on the filesystem at timeval intervals. If the amount of |
| 67 | * freespace is below acctsuspend percent, accounting is suspended. If |
| 68 | * accounting has been suspended, and freespace rises above acctresume, |
| 69 | * accounting is resumed. |
| 70 | */ |
| 71 | /* ARGSUSED */ |
| 72 | sysacct(p, uap, retval) |
| 73 | struct proc *p; |
| 74 | struct args { |
| 75 | char *fname; |
| 76 | } *uap; |
| 77 | int *retval; |
| 78 | { |
| 79 | |
| 80 | /* |
| 81 | * Body deleted. |
| 82 | */ |
| 83 | return (ENOSYS); |
| 84 | } |
| 85 | |
| 86 | /* |
| 87 | * Periodically check the file system to see if accounting |
| 88 | * should be turned on or off. |
| 89 | */ |
| 90 | acctwatch(resettime) |
| 91 | struct timeval *resettime; |
| 92 | { |
| 93 | struct statfs sb; |
| 94 | |
| 95 | if (savacctp) { |
| 96 | (void)VFS_STATFS(savacctp->v_mount, &sb, (struct proc *)0); |
| 97 | if (sb.f_bavail > acctresume * sb.f_blocks / 100) { |
| 98 | acctp = savacctp; |
| 99 | savacctp = NULL; |
| 100 | log(LOG_NOTICE, "Accounting resumed\n"); |
| 101 | return; |
| 102 | } |
| 103 | } |
| 104 | if (acctp == NULL) |
| 105 | return; |
| 106 | (void)VFS_STATFS(acctp->v_mount, &sb, (struct proc *)0); |
| 107 | if (sb.f_bavail <= acctsuspend * sb.f_blocks / 100) { |
| 108 | savacctp = acctp; |
| 109 | acctp = NULL; |
| 110 | log(LOG_NOTICE, "Accounting suspended\n"); |
| 111 | } |
| 112 | timeout(acctwatch, (caddr_t)resettime, hzto(resettime)); |
| 113 | } |
| 114 | |
| 115 | /* |
| 116 | * This routine calculates an accounting record for a process and, |
| 117 | * if accounting is enabled, writes it to the accounting file. |
| 118 | */ |
| 119 | acct(p) |
| 120 | register struct proc *p; |
| 121 | { |
| 122 | |
| 123 | /* |
| 124 | * Body deleted. |
| 125 | */ |
| 126 | return; |
| 127 | } |