1.\" 2.\" Copyright (c) 1994 Simon J. Gerraty 3.\" Copyright (c) 1994 Christopher G. Demetriou 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. All advertising materials mentioning features or use of this software 15.\" must display the following acknowledgement: 16.\" This product includes software developed by Christopher G. Demetriou. 17.\" 3. The name of the author may not be used to endorse or promote products 18.\" derived from this software without specific prior written permission 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30.\" 31.\" $FreeBSD: src/usr.sbin/ac/ac.8,v 1.13.2.5 2003/03/11 21:13:47 trhodes Exp $ 32.\" 33.Dd March 15, 1994 34.Dt AC 8 35.Os 36.Sh NAME 37.Nm ac 38.Nd connect time accounting 39.Sh SYNOPSIS 40.Nm 41.Op Fl dp 42.\".Op Fl c Ar console 43.Op Fl t Ar tty 44.Op Fl w Ar wtmp 45.Op Ar users ... 46.Sh DESCRIPTION 47If the file 48.Pa /var/log/wtmp 49exists, a record of individual login and logout 50times are written to it by 51.Xr login 1 52and 53.Xr init 8 , 54respectively. 55The 56.Nm 57utility 58examines these records and writes the accumulated connect time (in hours) 59for all logins to the standard output. 60.Pp 61The options are as follows: 62.Bl -tag -width indentXXX 63.It Fl d 64Display the connect times in 24 hour chunks. 65.\" .It Fl c Ar console 66.\" Use 67.\" .Ar console 68.\" as the name of the device that local X sessions (ut_host of ":0.0") 69.\" originate from. If any login has been recorded on 70.\" .Ar console 71.\" then these X sessions are ignored. 72.It Fl p 73Print individual users' totals. 74.It Fl t Ar tty 75Only do accounting logins on certain ttys. The 76.Ar tty 77specification can start with '!' to indicate not this 78.Ar tty 79and end with '*' to indicate all similarly named ttys. 80Multiple 81.Fl t 82flags may be specified. 83.It Fl w Ar wtmp 84Read connect time data from 85.Ar wtmp 86instead of the default file, 87.Pa /var/log/wtmp . 88.It Ar users ... 89Display totals for the given individuals only. 90.El 91.Pp 92If no arguments are given, 93.Nm 94displays the total connect time for all 95accounts with login sessions recorded in 96.Pa wtmp . 97.Pp 98The default 99.Pa wtmp 100file will increase without bound unless it is truncated. 101It is normally truncated by the daily scripts run 102by 103.Xr cron 8 , 104which rename and rotate the 105.Pa wtmp 106files, keeping a week's worth of data on 107hand. No login or connect time accounting is performed if 108.Pa /var/log/wtmp 109does not exist. 110.Pp 111For example, 112.Bd -literal 113ac -p -t "ttyd*" > modems 114ac -p -t "!ttyd*" > other 115.Ed 116.Pp 117allows times recorded in 118.Pa modems 119to be charged out at a different rate than 120.Pa other . 121.Sh FILES 122.Bl -tag -width /var/log/wtmp -compact 123.It Pa /var/log/wtmp 124connect time accounting file 125.El 126.Sh EXIT STATUS 127.Ex -std 128.Sh SEE ALSO 129.Xr login 1 , 130.Xr utmp 5 , 131.Xr init 8 , 132.Xr sa 8 133