Copyright (c) 1994 Simon J. Gerraty
Copyright (c) 1994 Christopher G. Demetriou
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.Dd February 14, 2020 .Dt AC 8 .Os .Sh NAME .Nm ac .Nd connect time accounting .Sh SYNOPSIS .Nm .Op Fl dp .Op Fl c Ar console
.Op Fl t Ar tty .Op Fl w Ar wtmp .Op Ar users ... .Sh DESCRIPTION If the file

a /var/log/utx.log exists, a record of individual login and logout times are written to it by .Xr login 1 and .Xr init 8 , respectively. The .Nm utility examines these records and writes the accumulated connect time (in hours) for all logins to the standard output.

p The options are as follows: l -tag -width indentXXX t Fl d Display the connect times in 24 hour chunks. .It Fl c Ar console
Use
.Ar console
as the name of the device that local X sessions (ut_host of ":0.0")
originate from. If any login has been recorded on
.Ar console
then these X sessions are ignored unless COMPAT_SUNOS was defined at
compile time.
t Fl p Print individual users' totals. t Fl t Ar tty Only do accounting logins on certain ttys. The .Ar tty specification can start with '!' to indicate not this .Ar tty and end with '*' to indicate all similarly named ttys. Multiple .Fl t flags may be specified. t Fl w Ar wtmp Read connect time data from .Ar wtmp instead of the default file,

a /var/log/utx.log . t Ar users ... Display totals for the given individuals only. .El

p If no arguments are given, .Nm displays the total connect time for all accounts with login sessions recorded in

a utx.log .

p The default

a utx.log file will increase without bound unless it is truncated. It is normally truncated by the daily scripts run by .Xr cron 8 , which rename and rotate the

a utx.log files, keeping a week's worth of data on hand. No login or connect time accounting is performed if

a /var/log/utx.log does not exist. .Sh FILES l -tag -width /var/log/utx.log -compact t Pa /var/log/utx.log connect time accounting file .El .Sh EXIT STATUS .Ex -std .Sh EXAMPLES Allow times recorded in

a modems to be charged out at a different rate than

a other : d -literal -offset indent ac -p -t "ttyd*" > modems ac -p -t "!ttyd*" > other .Ed .Sh SEE ALSO .Xr login 1 , .Xr getutxent 3 , .Xr init 8 , .Xr sa 8 .Sh HISTORY An .Nm command appeared in .At v5 . This version of .Nm was written for .Nx 0.9a from the specification provided by various systems' manual pages. .Sh NOTES
If COMPAT_SUNOS is defined
.Nm ac
ignores the fact that entries with ut_host of ":0.0" are not real
login sessions. Normally such entries are ignored except in the case
of a user being logged in when the
.Pa wtmp
file was rotated, in which case a login with ut_host of ":0.0" may
appear without any preceding console logins.
If no one is logged in on the console, the user is deemed to have
logged in on at the earliest time stamp found in
.Pa wtmp .
Use of
.Pa console
allows
.Nm ac
to identify and correctly process a logout for the user. The default
value for
.Pa console
is usually correct at compile time.