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