1.\" Copyright (c) 1980, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" %sccs.include.redist.man% 5.\" 6.\" @(#)ac.8 8.2 (Berkeley) 04/19/94 7.\" 8.Dd 9.Dt AC 8 10.Os BSD 4 11.Sh NAME 12.Nm ac 13.Nd display connect time accounting 14.Sh SYNOPSIS 15.Nm ac 16.Op Fl d 17.Op Fl p 18.Op Fl w Ar file 19.Op Ar users ... 20.Sh DESCRIPTION 21If the file 22.Pa /var/log/wtmp 23exists, 24a record of individual 25login and logout times are written to it by 26.Xr init 8 27and 28.Xr login 8 29respectively. 30The program 31.Nm ac 32examines these 33records and writes the accumulated connect time for all logins to the 34standard output. 35.Pp 36Options available: 37.Bl -tag -width people 38.It Fl d 39Display the connect times in 24 hour chunks. 40.It Fl p 41Display individual user totals. 42.It Fl w Ar file 43Read raw connect time data from 44.Ar file 45instead of the default file 46.Pa /var/log/wtmp . 47.It Ar users ... 48Display totals for the given individuals 49only. 50.El 51.Pp 52If no arguments are given, 53.Nm 54displays the total amount of login time for all active accounts on the 55system. 56.Pp 57The default 58.Pa wtmp 59file is an infinitely increasing file 60unless frequently truncated. This is normally 61done by the daily daemon scripts scheduled by 62.Xr cron 8 63which rename and rotate the 64.Pa wtmp 65files before truncating them (and keeping about a weeks worth on hand). 66No login times are collected however, if the file does not exist. 67.Sh FILES 68.Bl -tag -width /var/log/wtmp.[0-7] -compact 69.It Pa /var/log/wtmp 70.It Pa /var/log/wtmp.[0-7] 71rotated files 72.El 73.Sh SEE ALSO 74.Xr init 8 , 75.Xr sa 8 , 76.Xr login 1 , 77.Xr utmp 5 . 78.Sh HISTORY 79A 80.Nm 81command appeared in Version 6 AT&T UNIX. 82