NAME

acct − execution accounting file

SYNOPSIS

#include <sys/acct.h>

DESCRIPTION

The acct(2) system call makes entries 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:

/∗@(#)acct.h 2.7 87/03/12 SMI; from UCB 7.1 6/4/86 ∗/
 /∗
 ∗ 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.
 ∗/
 /∗
 ∗ 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
#ifdef SYSACCT
structacctacctbuf;
structvnode∗acctp;
#else
#defineacct()
#endif
#endif

If the process does 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)

Sun Release 4.0  —  Last change: 19 October 1987