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.\" $DragonFly: src/usr.sbin/ac/ac.8,v 1.3 2006/02/17 19:40:09 swildner Exp $ 33.\" 34.Dd March 15, 1994 35.Dt AC 8 36.Os 37.Sh NAME 38.Nm ac 39.Nd connect time accounting 40.Sh SYNOPSIS 41.Nm 42.Op Fl dp 43.\".Op Fl c Ar console 44.Op Fl t Ar tty 45.Op Fl w Ar wtmp 46.Op Ar users ... 47.Sh DESCRIPTION 48If the file 49.Pa /var/log/wtmp 50exists, a record of individual login and logout 51times are written to it by 52.Xr login 1 53and 54.Xr init 8 , 55respectively. 56The 57.Nm 58utility 59examines these records and writes the accumulated connect time (in hours) 60for all logins to the standard output. 61.Pp 62The options are as follows: 63.Bl -tag -width indentXXX 64.It Fl d 65Display the connect times in 24 hour chunks. 66.\" .It Fl c Ar console 67.\" Use 68.\" .Ar console 69.\" as the name of the device that local X sessions (ut_host of ":0.0") 70.\" originate from. If any login has been recorded on 71.\" .Ar console 72.\" then these X sessions are ignored unless COMPAT_SUNOS was defined at 73.\" compile time. 74.It Fl p 75Print individual users' totals. 76.It Fl t Ar tty 77Only do accounting logins on certain ttys. The 78.Ar tty 79specification can start with '!' to indicate not this 80.Ar tty 81and end with '*' to indicate all similarly named ttys. 82Multiple 83.Fl t 84flags may be specified. 85.It Fl w Ar wtmp 86Read connect time data from 87.Ar wtmp 88instead of the default file, 89.Pa /var/log/wtmp . 90.It Ar users ... 91Display totals for the given individuals only. 92.El 93.Pp 94If no arguments are given, 95.Nm 96displays the total connect time for all 97accounts with login sessions recorded in 98.Pa wtmp . 99.Pp 100The default 101.Pa wtmp 102file will increase without bound unless it is truncated. 103It is normally truncated by the daily scripts run 104by 105.Xr cron 8 , 106which rename and rotate the 107.Pa wtmp 108files, keeping a week's worth of data on 109hand. No login or connect time accounting is performed if 110.Pa /var/log/wtmp 111does not exist. 112.Pp 113For example, 114.Bd -literal -offset 115ac -p -t "ttyd*" > modems 116ac -p -t "!ttyd*" > other 117.Ed 118.Pp 119allows times recorded in 120.Pa modems 121to be charged out at a different rate than 122.Pa other . 123.Sh FILES 124.Bl -tag -width /var/log/wtmp -compact 125.It Pa /var/log/wtmp 126connect time accounting file 127.El 128.Sh DIAGNOSTICS 129.Ex -std 130.Sh SEE ALSO 131.Xr login 1 , 132.Xr utmp 5 , 133.Xr init 8 , 134.Xr sa 8 135.\" .Sh NOTES 136.\" If COMPAT_SUNOS is defined 137.\" .Nm ac 138.\" ignores the fact that entries with ut_host of ":0.0" are not real 139.\" login sessions. Normally such entries are ignored except in the case 140.\" of a user being logged in when the 141.\" .Pa wtmp 142.\" file was rotated, in which case a login with ut_host of ":0.0" may 143.\" appear without any preceding console logins. 144.\" If no one is logged in on the console, the user is deemed to have 145.\" logged in on at the earliest time stamp found in 146.\" .Pa wtmp . 147.\" Use of 148.\" .Pa console 149.\" allows 150.\" .Nm ac 151.\" to identify and correctly process a logout for the user. The default 152.\" value for 153.\" .Pa console 154.\" is usually correct at compile time. 155