acct.h

Go to the documentation of this file.

/*
 *  BSD Process Accounting for Linux - Definitions
 *
 *  Author: Marco van Wieringen ([email protected])
 *
 *  This header file contains the definitions needed to implement
 *  BSD-style process accounting. The kernel accounting code and all
 *  user-level programs that try to do something useful with the
 *  process accounting log must include this file.
 *
 *  Copyright (C) 1995 - 1997 Marco van Wieringen - ELM Consultancy B.V.
 *
 */

#ifndef _UAPI_LINUX_ACCT_H
#define _UAPI_LINUX_ACCT_H

#include <linux/types.h>

#include <asm/param.h>
#include <asm/byteorder.h>

/* 
 *  comp_t is a 16-bit "floating" point number with a 3-bit base 8
 *  exponent and a 13-bit fraction.
 *  comp2_t is 24-bit with 5-bit base 2 exponent and 20 bit fraction
 *  (leading 1 not stored).
 *  See linux/kernel/acct.c for the specific encoding systems used.
 */

typedef __u16   comp_t;
typedef __u32   comp2_t;

/*
 *   accounting file record
 *
 *   This structure contains all of the information written out to the
 *   process accounting file whenever a process exits.
 */

#define ACCT_COMM   16

struct acct
{
    char        ac_flag;        /* Flags */
    char        ac_version;     /* Always set to ACCT_VERSION */
    /* for binary compatibility back until 2.0 */
    __u16       ac_uid16;       /* LSB of Real User ID */
    __u16       ac_gid16;       /* LSB of Real Group ID */
    __u16       ac_tty;         /* Control Terminal */
    __u32       ac_btime;       /* Process Creation Time */
    comp_t      ac_utime;       /* User Time */
    comp_t      ac_stime;       /* System Time */
    comp_t      ac_etime;       /* Elapsed Time */
    comp_t      ac_mem;         /* Average Memory Usage */
    comp_t      ac_io;          /* Chars Transferred */
    comp_t      ac_rw;          /* Blocks Read or Written */
    comp_t      ac_minflt;      /* Minor Pagefaults */
    comp_t      ac_majflt;      /* Major Pagefaults */
    comp_t      ac_swaps;       /* Number of Swaps */
/* m68k had no padding here. */
#if !defined(CONFIG_M68K) || !defined(__KERNEL__)
    __u16       ac_ahz;         /* AHZ */
#endif
    __u32       ac_exitcode;        /* Exitcode */
    char        ac_comm[ACCT_COMM + 1]; /* Command Name */
    __u8        ac_etime_hi;        /* Elapsed Time MSB */
    __u16       ac_etime_lo;        /* Elapsed Time LSB */
    __u32       ac_uid;         /* Real User ID */
    __u32       ac_gid;         /* Real Group ID */
};

struct acct_v3
{
    char        ac_flag;        /* Flags */
    char        ac_version;     /* Always set to ACCT_VERSION */
    __u16       ac_tty;         /* Control Terminal */
    __u32       ac_exitcode;        /* Exitcode */
    __u32       ac_uid;         /* Real User ID */
    __u32       ac_gid;         /* Real Group ID */
    __u32       ac_pid;         /* Process ID */
    __u32       ac_ppid;        /* Parent Process ID */
    __u32       ac_btime;       /* Process Creation Time */
#ifdef __KERNEL__
    __u32       ac_etime;       /* Elapsed Time */
#else
    float       ac_etime;       /* Elapsed Time */
#endif
    comp_t      ac_utime;       /* User Time */
    comp_t      ac_stime;       /* System Time */
    comp_t      ac_mem;         /* Average Memory Usage */
    comp_t      ac_io;          /* Chars Transferred */
    comp_t      ac_rw;          /* Blocks Read or Written */
    comp_t      ac_minflt;      /* Minor Pagefaults */
    comp_t      ac_majflt;      /* Major Pagefaults */
    comp_t      ac_swaps;       /* Number of Swaps */
    char        ac_comm[ACCT_COMM]; /* Command Name */
};

/*
 *  accounting flags
 */
                /* bit set when the process ... */
#define AFORK       0x01    /* ... executed fork, but did not exec */
#define ASU     0x02    /* ... used super-user privileges */
#define ACOMPAT     0x04    /* ... used compatibility mode (VAX only not used) */
#define ACORE       0x08    /* ... dumped core */
#define AXSIG       0x10    /* ... was killed by a signal */

#ifdef __BIG_ENDIAN
#define ACCT_BYTEORDER  0x80    /* accounting file is big endian */
#else
#define ACCT_BYTEORDER  0x00    /* accounting file is little endian */
#endif

#ifndef __KERNEL__
#define ACCT_VERSION    2
#define AHZ     (HZ)
#endif  /* __KERNEL */


#endif /* _UAPI_LINUX_ACCT_H */