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 
32 typedef __u16	comp_t;
33 typedef __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 
44 struct 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 
75 struct 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