ACCT(5) MidnightBSD File Formats Manual ACCT(5)

NAME

acct — execution accounting file

SYNOPSIS

#include <sys/types.h>
#include <sys/acct.h>

DESCRIPTION

The kernel maintains the following acct information structure for all processes. If a process terminates, and accounting is enabled, the kernel calls the acct(2) 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;

#define AC_COMM_LEN 16
struct acct {

	char	ac_comm[AC_COMM_LEN]; /* command name */
	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;	/* average memory usage */
	comp_t	ac_io;	/* count of IO blocks */
	dev_t	ac_tty;	/* controlling tty */
#define	AFORK	0x01	/* forked but not exec’ed */
#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

If a terminated process was created by an execve(2), the name of the executed file (at most ten characters of it) is saved in the field ac_comm and its status is saved by setting one of more of the following flags in ac_flag: AFORK, ACOMPAT, ACORE and ASIG. ASU is no longer supported.

SEE ALSO

acct(2), execve(2), sa(8)

HISTORY

A acct file format appeared in Version 7 AT&T UNIX.

MidnightBSD 0.3 June 5, 1993 MidnightBSD 0.3