PWB1/usr/man/man8/ac.8

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.th AC VIII 5/31/77
.sh NAME
ac \- login accounting
.sh SYNOPSIS
.bd /etc/ac
.bd \-\c
sys
[
.bd \-w
wtmp ] [
.bd \-p
[
people
] ]
.sh DESCRIPTION
.it Ac
produces a printout giving the
connect time
for each user who has logged in
during the life of the current
.it wtmp
file.
A total is also produced.
.it sys
specifies the name of the system
(e.g., A) on which
.it ac
is run.
This information is used for the output heading.
.bd \-w
is used to specify an alternate \fIwtmp\fR file.
.bd \-p
without
.it people
prints all individual totals; without this option,
only system totals are printed.
Any
.it people
specified after the
.bd \-p
option
will limit the
printout to only the specified login names.
If no \fIwtmp\fR file is given,
.it /usr/actg/data/wtmp
is used.
.s3
.it Ac
also updates the file
.it /usr/actg/data/log
with the
last date on which each user-id was logged into the system,
and
.it /usr/actg/data/uacct
with any fees from the previous day,
by reading those fees from
.it /usr/actg/data/fee.
.s3
The accounting file
.it /usr/adm/wtmp
is maintained by
.it init
and
.it login.
Neither of these programs creates the file,
so if it does not exist,
no connect-time accounting is done.
To start accounting, that file should be created with length 0.
On the other hand, if the file is left undisturbed it will
grow without bound,
so the desired information
should be collected periodically, and the file truncated.
.s3
Normally,
.it /usr/adm/wtmp
should be copied into the file specified by the
.bd \-w
option (or, in the absence of that option, into
.it /usr/actg/data/wtmp\^\c
) before
.it ac
is invoked; this is also the time at which
.it /usr/adm/wtmp
should be normally truncated.
.sh FILES
.nf
/usr/adm/wtmp
/usr/actg/data/fee
/usr/actg/data/uacct
/usr/actg/data/log
.fi
.sh "SEE ALSO"
init(VIII), login(I), wtmp(V)