acct.h

  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 */