\" $NetBSD: ac.8,v 1.19 2017/07/03 21:35:29 wiz Exp $
\"
\" Copyright (c) 1980, 1991, 1993
\" The Regents of the University of California. All rights reserved.
\" Copyright (c) 1994 Simon J. Gerraty
\" Copyright (c) 1994 Christopher G. Demetriou
\" All rights reserved.
\"
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\" modification, are permitted provided that the following conditions
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\" 3. All advertising materials mentioning features or use of this software
\" must display the following acknowledgements:
\" This product includes software developed by the University of
\" California, Berkeley and its contributors.
\" This product includes software developed by Christopher G. Demetriou.
\" 4. Neither the name of the University nor the names of its contributors
\" may be used to endorse or promote products derived from this software
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\" @(#)ac.8 8.2 (Berkeley) 4/19/94
\"
Dd April 19, 1994
Dt AC 8
Os
Sh NAME
Nm ac
Nd display connect time accounting
Sh SYNOPSIS
Nm
Op Fl d | p
Op Fl t Ar tty
Op Fl w Ar file
Op Ar users ...
Sh DESCRIPTION
If the file
Pa /var/log/wtmp
exists,
a record of individual
login and logout times are written to it by
Xr login 1
and
Xr init 8 ,
respectively.
The program
Nm
examines these
records and writes the accumulated connect time for all logins to the
standard output.
Pp
Options available:
Bl -tag -width indentXXX
It Fl d
Display the connect times in 24 hour chunks.
It Fl p
Display individual user totals.
It Fl t Ar tty
Only do accounting logins on certain ttys.
The
Ar tty
specification can start with
Ql \&!
to indicate not this
Ar tty
and end with
Ql *
to indicate all similarly named ttys.
Multiple
Fl t
flags may be specified.
It Fl w Ar file
Read raw connect time data from
Ar file
instead of the default file
Pa /var/log/wtmp .
It Ar users ...
Display totals for the given individuals
only.
El
Pp
If no arguments are given,
Nm
displays the total amount of login time for all active accounts on the
system.
Pp
The default
Pa wtmp
file is an infinitely increasing file
unless frequently truncated.
This is normally done by the daily daemon scripts scheduled by
Xr cron 8 ,
which rename and rotate the
Pa wtmp
files before truncating them (and keep about a week's worth on hand).
No login times are collected, however, if the file does not exist.
Pp
For example,
Bd -literal -offset indent
ac -p -t "ttyd*" > modems
ac -p -t "!ttyd*" > other
Ed
Pp
allows times recorded in
Pa modems
to be charged out at a different rate than
Pa other .
Sh FILES
Bl -tag -width /var/log/wtmp.[0-7] -compact
It Pa /var/log/wtmp
connect time accounting file
It Pa /var/log/wtmp.[0-7]
rotated files
El
Sh EXIT STATUS
Ex -std ac
Sh SEE ALSO
Xr login 1 ,
Xr utmp 5 ,
Xr init 8 ,
Xr sa 8
Sh HISTORY
An
Nm
command appeared in
At v6 .
This version of
Nm
was written for
Nx 1.0
from the specification provided by various systems' manual pages.
