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 _UAPI_LINUX_ACCT_H
17#define _UAPI_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#if !defined(CONFIG_M68K) || !defined(__KERNEL__)
65 __u16 ac_ahz; /* AHZ */
66#endif
67 __u32 ac_exitcode; /* Exitcode */
68 char ac_comm[ACCT_COMM + 1]; /* Command Name */
69 __u8 ac_etime_hi; /* Elapsed Time MSB */
70 __u16 ac_etime_lo; /* Elapsed Time LSB */
71 __u32 ac_uid; /* Real User ID */
72 __u32 ac_gid; /* Real Group ID */
73};
74
75struct acct_v3
76{
77 char ac_flag; /* Flags */
78 char ac_version; /* Always set to ACCT_VERSION */
79 __u16 ac_tty; /* Control Terminal */
80 __u32 ac_exitcode; /* Exitcode */
81 __u32 ac_uid; /* Real User ID */
82 __u32 ac_gid; /* Real Group ID */
83 __u32 ac_pid; /* Process ID */
84 __u32 ac_ppid; /* Parent Process ID */
85 /* __u32 range means times from 1970 to 2106 */
86 __u32 ac_btime; /* Process Creation Time */
87#ifdef __KERNEL__
88 __u32 ac_etime; /* Elapsed Time */
89#else
90 float ac_etime; /* Elapsed Time */
91#endif
92 comp_t ac_utime; /* User Time */
93 comp_t ac_stime; /* System Time */
94 comp_t ac_mem; /* Average Memory Usage */
95 comp_t ac_io; /* Chars Transferred */
96 comp_t ac_rw; /* Blocks Read or Written */
97 comp_t ac_minflt; /* Minor Pagefaults */
98 comp_t ac_majflt; /* Major Pagefaults */
99 comp_t ac_swaps; /* Number of Swaps */
100 char ac_comm[ACCT_COMM]; /* Command Name */
101};
102
103/*
104 * accounting flags
105 */
106 /* bit set when the process/task ... */
107#define AFORK 0x01 /* ... executed fork, but did not exec */
108#define ASU 0x02 /* ... used super-user privileges */
109#define ACOMPAT 0x04 /* ... used compatibility mode (VAX only not used) */
110#define ACORE 0x08 /* ... dumped core */
111#define AXSIG 0x10 /* ... was killed by a signal */
112#define AGROUP 0x20 /* ... was the last task of the process (task group) */
113
114#if defined(__BYTE_ORDER) ? __BYTE_ORDER == __BIG_ENDIAN : defined(__BIG_ENDIAN)
115#define ACCT_BYTEORDER 0x80 /* accounting file is big endian */
116#elif defined(__BYTE_ORDER) ? __BYTE_ORDER == __LITTLE_ENDIAN : defined(__LITTLE_ENDIAN)
117#define ACCT_BYTEORDER 0x00 /* accounting file is little endian */
118#else
119#error unspecified endianness
120#endif
121
122#ifndef __KERNEL__
123#define ACCT_VERSION 2
124#define AHZ (HZ)
125#endif /* __KERNEL */
126
127
128#endif /* _UAPI_LINUX_ACCT_H */
129