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132 lines
4.1 KiB
Groff
132 lines
4.1 KiB
Groff
.\" Copyright (c) 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)acct.5 8.1 (Berkeley) 6/5/93
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.\" $FreeBSD$
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.\"
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.Dd May 15, 2007
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.Dt ACCT 5
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.Os
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.Sh NAME
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.Nm acct
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.Nd execution accounting file
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.Sh SYNOPSIS
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.In sys/types.h
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.In sys/acct.h
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.Sh DESCRIPTION
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The kernel maintains the following
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.Fa acct
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information structure for all
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processes.
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If a process terminates, and accounting is enabled,
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the kernel calls the
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.Xr acct 2
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function call to prepare and append the record
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to the accounting file.
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.Bd -literal
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#define AC_COMM_LEN 16
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/*
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* Accounting structure version 2 (current).
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* The first byte is always zero.
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* Time units are microseconds.
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*/
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struct acctv2 {
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uint8_t ac_zero; /* zero identifies new version */
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uint8_t ac_version; /* record version number */
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uint16_t ac_len; /* record length */
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char ac_comm[AC_COMM_LEN]; /* command name */
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float ac_utime; /* user time */
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float ac_stime; /* system time */
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float ac_etime; /* elapsed time */
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time_t ac_btime; /* starting time */
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uid_t ac_uid; /* user id */
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gid_t ac_gid; /* group id */
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float ac_mem; /* average memory usage */
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float ac_io; /* count of IO blocks */
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__dev_t ac_tty; /* controlling tty */
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uint16_t ac_len2; /* record length */
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union {
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__dev_t ac_align; /* force v1 compatible alignment */
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#define AFORK 0x01 /* forked but not exec'ed */
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/* ASU is no longer supported */
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#define ASU 0x02 /* used super-user permissions */
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#define ACOMPAT 0x04 /* used compatibility mode */
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#define ACORE 0x08 /* dumped core */
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#define AXSIG 0x10 /* killed by a signal */
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#define ANVER 0x20 /* new record version */
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uint8_t ac_flag; /* accounting flags */
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} ac_trailer;
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#define ac_flagx ac_trailer.ac_flag
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};
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.Ed
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.Pp
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If a terminated process was created by an
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.Xr execve 2 ,
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the name of the executed file (at most ten characters of it)
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is saved in the field
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.Fa ac_comm
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and its status is saved by setting one of more of the following flags in
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.Fa ac_flag :
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.Dv AFORK ,
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.Dv ACOMPAT ,
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.Dv ACORE
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and
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.Dv ASIG .
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.Dv ASU
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is no longer supported.
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.Dv ANVER
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is always set in the above structure.
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.Sh SEE ALSO
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.Xr lastcomm 1 ,
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.Xr acct 2 ,
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.Xr execve 2 ,
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.Xr sa 8
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.Sh HISTORY
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A
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.Nm
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file format appeared in
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.At v7 .
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The current record format was introduced on May 2007.
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It is backwards compatible with the previous format,
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which is still documented in
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.In sys/acct.h
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and supported by
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.Xr lastcomm 1
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and
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.Xr sa 8 .
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