1.\" Copyright (c) 1980, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)ac.8 8.2 (Berkeley) 4/19/94 33.\" 34.Dd April 19, 1994 35.Dt AC 8 36.Os BSD 4 37.Sh NAME 38.Nm ac 39.Nd display connect time accounting 40.Sh SYNOPSIS 41.Nm ac 42.Op Fl d 43.Op Fl p 44.Op Fl w Ar file 45.Op Ar users ... 46.Sh DESCRIPTION 47If the file 48.Pa /var/log/wtmp 49exists, 50a record of individual 51login and logout times are written to it by 52.Xr init 8 53and 54.Xr login 8 55respectively. 56The program 57.Nm ac 58examines these 59records and writes the accumulated connect time for all logins to the 60standard output. 61.Pp 62Options available: 63.Bl -tag -width people 64.It Fl d 65Display the connect times in 24 hour chunks. 66.It Fl p 67Display individual user totals. 68.It Fl w Ar file 69Read raw connect time data from 70.Ar file 71instead of the default file 72.Pa /var/log/wtmp . 73.It Ar users ... 74Display totals for the given individuals 75only. 76.El 77.Pp 78If no arguments are given, 79.Nm 80displays the total amount of login time for all active accounts on the 81system. 82.Pp 83The default 84.Pa wtmp 85file is an infinitely increasing file 86unless frequently truncated. This is normally 87done by the daily daemon scripts scheduled by 88.Xr cron 8 89which rename and rotate the 90.Pa wtmp 91files before truncating them (and keeping about a weeks worth on hand). 92No login times are collected however, if the file does not exist. 93.Sh FILES 94.Bl -tag -width /var/log/wtmp.[0-7] -compact 95.It Pa /var/log/wtmp 96.It Pa /var/log/wtmp.[0-7] 97rotated files 98.El 99.Sh SEE ALSO 100.Xr init 8 , 101.Xr sa 8 , 102.Xr login 1 , 103.Xr utmp 5 . 104.Sh HISTORY 105A 106.Nm 107command appeared in Version 6 AT&T UNIX. 108