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1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2/*
3 * BSD Process Accounting for Linux - Definitions
4 *
5 * Author: Marco van Wieringen (mvw@planets.elm.net)
6 *
7 * This header file contains the definitions needed to implement
8 * BSD-style process accounting. The kernel accounting code and all
9 * user-level programs that try to do something useful with the
10 * process accounting log must include this file.
11 *
12 * Copyright (C) 1995 - 1997 Marco van Wieringen - ELM Consultancy B.V.
13 *
14 */
15
16#ifndef _LINUX_ACCT_H
17#define _LINUX_ACCT_H
18
19#include <linux/types.h>
20
21#include <asm/param.h>
22#include <asm/byteorder.h>
23
24/*
25 * comp_t is a 16-bit "floating" point number with a 3-bit base 8
26 * exponent and a 13-bit fraction.
27 * comp2_t is 24-bit with 5-bit base 2 exponent and 20 bit fraction
28 * (leading 1 not stored).
29 * See linux/kernel/acct.c for the specific encoding systems used.
30 */
31
32typedef __u16 comp_t;
33typedef __u32 comp2_t;
34
35/*
36 * accounting file record
37 *
38 * This structure contains all of the information written out to the
39 * process accounting file whenever a process exits.
40 */
41
42#define ACCT_COMM 16
43
44struct acct
45{
46 char ac_flag; /* Flags */
47 char ac_version; /* Always set to ACCT_VERSION */
48 /* for binary compatibility back until 2.0 */
49 __u16 ac_uid16; /* LSB of Real User ID */
50 __u16 ac_gid16; /* LSB of Real Group ID */
51 __u16 ac_tty; /* Control Terminal */
52 /* __u32 range means times from 1970 to 2106 */
53 __u32 ac_btime; /* Process Creation Time */
54 comp_t ac_utime; /* User Time */
55 comp_t ac_stime; /* System Time */
56 comp_t ac_etime; /* Elapsed Time */
57 comp_t ac_mem; /* Average Memory Usage */
58 comp_t ac_io; /* Chars Transferred */
59 comp_t ac_rw; /* Blocks Read or Written */
60 comp_t ac_minflt; /* Minor Pagefaults */
61 comp_t ac_majflt; /* Major Pagefaults */
62 comp_t ac_swaps; /* Number of Swaps */
63/* m68k had no padding here. */
64 __u16 ac_ahz; /* AHZ */
65 __u32 ac_exitcode; /* Exitcode */
66 char ac_comm[ACCT_COMM + 1]; /* Command Name */
67 __u8 ac_etime_hi; /* Elapsed Time MSB */
68 __u16 ac_etime_lo; /* Elapsed Time LSB */
69 __u32 ac_uid; /* Real User ID */
70 __u32 ac_gid; /* Real Group ID */
71};
72
73struct acct_v3
74{
75 char ac_flag; /* Flags */
76 char ac_version; /* Always set to ACCT_VERSION */
77 __u16 ac_tty; /* Control Terminal */
78 __u32 ac_exitcode; /* Exitcode */
79 __u32 ac_uid; /* Real User ID */
80 __u32 ac_gid; /* Real Group ID */
81 __u32 ac_pid; /* Process ID */
82 __u32 ac_ppid; /* Parent Process ID */
83 /* __u32 range means times from 1970 to 2106 */
84 __u32 ac_btime; /* Process Creation Time */
85 float ac_etime; /* Elapsed Time */
86 comp_t ac_utime; /* User Time */
87 comp_t ac_stime; /* System Time */
88 comp_t ac_mem; /* Average Memory Usage */
89 comp_t ac_io; /* Chars Transferred */
90 comp_t ac_rw; /* Blocks Read or Written */
91 comp_t ac_minflt; /* Minor Pagefaults */
92 comp_t ac_majflt; /* Major Pagefaults */
93 comp_t ac_swaps; /* Number of Swaps */
94 char ac_comm[ACCT_COMM]; /* Command Name */
95};
96
97/*
98 * accounting flags
99 */
100 /* bit set when the process/task ... */
101#define AFORK 0x01 /* ... executed fork, but did not exec */
102#define ASU 0x02 /* ... used super-user privileges */
103#define ACOMPAT 0x04 /* ... used compatibility mode (VAX only not used) */
104#define ACORE 0x08 /* ... dumped core */
105#define AXSIG 0x10 /* ... was killed by a signal */
106#define AGROUP 0x20 /* ... was the last task of the process (task group) */
107
108#if defined(__BYTE_ORDER) ? __BYTE_ORDER == __BIG_ENDIAN : defined(__BIG_ENDIAN)
109#define ACCT_BYTEORDER 0x80 /* accounting file is big endian */
110#elif defined(__BYTE_ORDER) ? __BYTE_ORDER == __LITTLE_ENDIAN : defined(__LITTLE_ENDIAN)
111#define ACCT_BYTEORDER 0x00 /* accounting file is little endian */
112#else
113#error unspecified endianness
114#endif
115
116#define ACCT_VERSION 2
117#define AHZ (HZ)
118
119
120#endif /* _LINUX_ACCT_H */