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NAME

SYNOPSIS

DESCRIPTION

The kernel maintains the following information structure for all processes. If a process terminates, and accounting is enabled, the kernel calls the function call to prepare and append the record to the accounting file. /* * Accounting structures; these use a comp_t type which is a 3 bits base 8
* exponent, 13 bit fraction ‘‘floating point’’ number. Units are 1/AHZ
* seconds.
*/
typedef u_short comp_t;

struct acct {    char    ac_comm[10];    /* name of command */
   comp_t    ac_utime;    /* user time */
   comp_t    ac_stime;    /* system time */
   comp_t    ac_etime;    /* elapsed time */
   time_t    ac_btime;    /* starting time */
   uid_t    ac_uid;        /* user id */
   gid_t    ac_gid;        /* group id */
   short    ac_mem;        /* memory usage average */
   comp_t    ac_io;        /* count of IO blocks */
   dev_t    ac_tty;        /* controlling tty */
#define    AFORK    0x01        /* forked but not execed */ #define    ASU    0x02        /* used super-user permissions */ #define    ACOMPAT    0x04        /* used compatibility mode */ #define    ACORE    0x08        /* dumped core */ #define    AXSIG    0x10        /* killed by a signal */    char    ac_flag;    /* accounting flags */
};

/* * 1/AHZ is the granularity of the data encoded in the comp_t fields.
* This is not necessarily equal to hz.
*/
#define    AHZ    64

#ifdef KERNEL struct vnode    *acctp; #endif If a terminated process was created by an the name of the executed file (at most ten characters of it) is saved in the field and its status is saved by setting one of more of the following flags in and

SEE ALSO

HISTORY

A file format appeared in

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