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15637ed4 RG |
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 | */ | |
3c7eb27c DG |
71 | |
72 | struct sysacct_args { | |
73 | char *fname; | |
74 | }; | |
75 | ||
15637ed4 RG |
76 | /* ARGSUSED */ |
77 | sysacct(p, uap, retval) | |
78 | struct proc *p; | |
3c7eb27c | 79 | struct sysacct_args *uap; |
15637ed4 RG |
80 | int *retval; |
81 | { | |
82 | ||
83 | /* | |
84 | * Body deleted. | |
85 | */ | |
86 | return (ENOSYS); | |
87 | } | |
88 | ||
89 | /* | |
90 | * Periodically check the file system to see if accounting | |
91 | * should be turned on or off. | |
92 | */ | |
93 | acctwatch(resettime) | |
94 | struct timeval *resettime; | |
95 | { | |
96 | struct statfs sb; | |
97 | ||
98 | if (savacctp) { | |
99 | (void)VFS_STATFS(savacctp->v_mount, &sb, (struct proc *)0); | |
100 | if (sb.f_bavail > acctresume * sb.f_blocks / 100) { | |
101 | acctp = savacctp; | |
102 | savacctp = NULL; | |
103 | log(LOG_NOTICE, "Accounting resumed\n"); | |
104 | return; | |
105 | } | |
106 | } | |
107 | if (acctp == NULL) | |
108 | return; | |
109 | (void)VFS_STATFS(acctp->v_mount, &sb, (struct proc *)0); | |
110 | if (sb.f_bavail <= acctsuspend * sb.f_blocks / 100) { | |
111 | savacctp = acctp; | |
112 | acctp = NULL; | |
113 | log(LOG_NOTICE, "Accounting suspended\n"); | |
114 | } | |
115 | timeout(acctwatch, (caddr_t)resettime, hzto(resettime)); | |
116 | } | |
117 | ||
118 | /* | |
119 | * This routine calculates an accounting record for a process and, | |
120 | * if accounting is enabled, writes it to the accounting file. | |
121 | */ | |
122 | acct(p) | |
123 | register struct proc *p; | |
124 | { | |
125 | ||
126 | /* | |
127 | * Body deleted. | |
128 | */ | |
129 | return; | |
130 | } |