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.\" 15.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25.\" 26.\" $FreeBSD: head/usr.sbin/ac/ac.8 248413 2013-03-17 06:54:04Z joel $ 27.\" 28.Dd September 10, 2019 29.Dt AC 8 30.Os 31.Sh NAME 32.Nm ac 33.Nd connect time accounting 34.Sh SYNOPSIS 35.Nm 36.Op Fl dp 37.\".Op Fl c Ar console 38.Op Fl t Ar tty 39.Op Fl w Ar wtmp 40.Op Ar users ... 41.Sh DESCRIPTION 42If the file 43.Pa /var/log/wtmpx 44exists, a record of individual login and logout 45times are written to it by 46.Xr login 1 47and 48.Xr init 8 , 49respectively. 50The 51.Nm 52utility 53examines these records and writes the accumulated connect time (in hours) 54for all logins to the standard output. 55.Pp 56The options are as follows: 57.Bl -tag -width indentXXX 58.It Fl d 59Display the connect times in 24 hour chunks. 60.\" .It Fl c Ar console 61.\" Use 62.\" .Ar console 63.\" as the name of the device that local X sessions (ut_host of ":0.0") 64.\" originate from. If any login has been recorded on 65.\" .Ar console 66.\" then these X sessions are ignored. 67.It Fl p 68Print individual users' totals. 69.It Fl t Ar tty 70Only do accounting logins on certain ttys. 71The 72.Ar tty 73specification can start with '!' to indicate not this 74.Ar tty 75and end with '*' to indicate all similarly named ttys. 76Multiple 77.Fl t 78flags may be specified. 79.It Fl w Ar wtmp 80Read connect time data from 81.Ar wtmp 82instead of the default file, 83.Pa /var/log/wtmpx . 84.It Ar users ... 85Display totals for the given individuals only. 86.El 87.Pp 88If no arguments are given, 89.Nm 90displays the total connect time for all 91accounts with login sessions recorded in 92.Pa wtmpx . 93.Pp 94The default 95.Pa wtmpx 96file will increase without bound unless it is truncated. 97It is normally truncated by the daily scripts run 98by 99.Xr cron 8 , 100which rename and rotate the 101.Pa wtmpx 102files, keeping a week's worth of data on 103hand. 104No login or connect time accounting is performed if 105.Pa /var/log/wtmpx 106does not exist. 107.Sh FILES 108.Bl -tag -width /var/log/wtmpx -compact 109.It Pa /var/log/wtmpx 110connect time accounting file 111.El 112.Sh EXIT STATUS 113.Ex -std 114.Sh EXAMPLES 115Allow times recorded in 116.Pa modems 117to be charged out at a different rate than 118.Pa other : 119.Bd -literal -offset indent 120ac -p -t "ttyd*" > modems 121ac -p -t "!ttyd*" > other 122.Ed 123.Sh SEE ALSO 124.Xr login 1 , 125.Xr getutxent 3 , 126.Xr utmpx 5 , 127.Xr init 8 , 128.Xr sa 8 129