NAME

acct − execution accounting file

SYNOPSIS

#include <sys/acct.h>

DESCRIPTION

The acct(2) system call arranges for entries to be made in an accounting file for each process that terminates. The accounting file is a sequence of entries whose layout, as defined by the include file is:

/∗
 ∗ 5799-WZQ (C) COPYRIGHT = NONE
 ∗ LICENSED MATERIALS - PROPERTY OF IBM
 ∗/
/∗ $Header:acct.h 12.0$ ∗/
/∗ $ACIS:acct.h 12.0$ ∗/
/∗ $Source: /ibm/acis/usr/sys/h/RCS/acct.h,v $ ∗/
 #if !defined(lint) && !defined(LOCORE) && defined(RCS_HDRS)
static char ∗rcsidacct = "$Header:acct.h 12.0$";
#endif
 #if !defined(KERNEL) && !defined(STANDALONE)
#include <sys/nfs_defines.h>
#endif
 /∗
 ∗ Copyright (c) 1982, 1986 Regents of the University of California.
 ∗ All rights reserved.  The Berkeley software License Agreement
 ∗ specifies the terms and conditions for redistribution.
 ∗
 ∗@(#)acct.h7.1 (Berkeley) 6/4/86
 ∗/
 /∗
 ∗ 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.
 ∗/
typedefu_short comp_t;
 structacct
{
charac_comm[10];/∗ Accounting command name ∗/
comp_tac_utime;/∗ Accounting user time ∗/
comp_tac_stime;/∗ Accounting system time ∗/
comp_tac_etime;/∗ Accounting elapsed time ∗/
time_tac_btime;/∗ Beginning time ∗/
uid_tac_uid;/∗ Accounting user ID ∗/
gid_tac_gid;/∗ Accounting group ID ∗/
shortac_mem;/∗ average memory usage ∗/
comp_tac_io;/∗ number of disk IO blocks ∗/
dev_tac_tty;/∗ control typewriter ∗/
charac_flag;/∗ Accounting flag ∗/
};
 #defineAFORK0001 /∗ has executed fork, but no exec ∗/
#defineASU0002/∗ used super-user privileges ∗/
#defineACOMPAT0004/∗ used compatibility mode ∗/
#defineACORE0010/∗ dumped core ∗/
#defineAXSIG0020/∗ killed by a signal ∗/
 /∗
 ∗ 1/AHZ is the granularity of the data encoded in the various
 ∗ comp_t fields.  This is not necessarily equal to hz.
 ∗/
#define AHZ 64
 #ifdef KERNEL
structacctacctbuf;
#ifdef VFS
structvnode∗acctp;
#else VFS
structinode∗acctp;
#endif VFS
#endif

If the process was created by an execve(2), the first 10 characters of the filename appear in ac_comm.  The accounting flag contains bits indicating whether execve(2) was ever accomplished, and whether the process ever had super-user privileges.

SEE ALSO

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

7th Edition  —  May 19, 1986