bsd/man/man5/acct.5

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  34 .\"     @(#)acct.5      8.1 (Berkeley) 6/5/93
  35 .\"
  36 .Dd June 5, 1993
  37 .Dt ACCT 5
  38 .Os
  39 .Sh NAME
  40 .Nm acct
  41 .Nd execution accounting file
  42 .Sh SYNOPSIS
  43 .Fd #include <sys/acct.h>
  44 .Sh DESCRIPTION
  45 The kernel maintains the following
  46 .Fa acct
  47 information structure for all
  48 processes. If a process terminates, and accounting is enabled,
  49 the kernel calls the
  50 .Xr acct 2
  51 function call to prepare and append the record
  52 to the accounting file.
  53 .Bd -literal
  54 /*
  55  * Accounting structures; these use a comp_t type which is a 3 bits base 8
  56  * exponent, 13 bit fraction ``floating point'' number.  Units are 1/AHZ
  57  * seconds.
  58  */
  59 typedef u_short comp_t;
  60
  61 struct acct {
  62         char    ac_comm[10];    /* name of command */
  63         comp_t  ac_utime;       /* user time */
  64         comp_t  ac_stime;       /* system time */
  65         comp_t  ac_etime;       /* elapsed time */
  66         time_t  ac_btime;       /* starting time */
  67         uid_t   ac_uid;         /* user id */
  68         gid_t   ac_gid;         /* group id */
  69         short   ac_mem;         /* memory usage average */
  70         comp_t  ac_io;          /* count of IO blocks */
  71         dev_t   ac_tty;         /* controlling tty */
  72 #define AFORK   0x01            /* forked but not execed */
  73 #define ASU     0x02            /* used super-user permissions */
  74 #define ACOMPAT 0x04            /* used compatibility mode */
  75 #define ACORE   0x08            /* dumped core */
  76 #define AXSIG   0x10            /* killed by a signal */
  77         char    ac_flag;        /* accounting flags */
  78 };
  79
  80 /*
  81  * 1/AHZ is the granularity of the data encoded in the comp_t fields.
  82  * This is not necessarily equal to hz.
  83  */
  84 #define AHZ     64
  85
  86 #ifdef KERNEL
  87 struct vnode    *acctp;
  88 #endif
  89 .Ed
  90 .Pp
  91 If a terminated process was created by an
  92 .Xr execve 2 ,
  93 the name of the executed file (at most ten characters of it)
  94 is saved in the field
  95 .Fa ac_comm
  96 and its status is saved by setting one of more of the following flags in
  97 .Fa ac_flag:
  98 .Dv AFORK ,
  99 .Dv ASU ,
 100 .Dv ACOMPAT ,
 101 .Dv ACORE
 102 and
 103 .Dv ASIG .
 104 .Sh SEE ALSO
 105 .Xr lastcomm 1 ,
 106 .Xr acct 2 ,
 107 .Xr execve 2 ,
 108 .Xr accton 8 ,
 109 .Xr sa 8
 110 .Sh HISTORY
 111 A
 112 .Nm
 113 file format appeared in
 114 .At v7 .