Copyright (c) 1980, 1991, 1993
The Regents of the University of California. All rights reserved.
Copyright (c) 1994 Simon J. Gerraty
Copyright (c) 1994 Christopher G. Demetriou
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This product includes software developed by the University of
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This product includes software developed by Christopher G. Demetriou.
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@(#)ac.8 8.2 (Berkeley) 4/19/94
.Dd April 19, 1994 .Dt AC 8 .Os .Sh NAME .Nm ac .Nd display connect time accounting .Sh SYNOPSIS .Nm .Op Fl d | p .Op Fl t Ar tty .Op Fl w Ar file .Op Ar users ... .Sh DESCRIPTION If the file
a /var/log/wtmp exists, a record of individual login and logout times are written to it by .Xr login 1 and .Xr init 8 , respectively. The program .Nm examines these records and writes the accumulated connect time for all logins to the standard output.
p Options available: l -tag -width indentXXX t Fl d Display the connect times in 24 hour chunks. t Fl p Display individual user totals. t Fl t Ar tty Only do accounting logins on certain ttys. The .Ar tty specification can start with .Ql ! to indicate not this .Ar tty and end with .Ql * to indicate all similarly named ttys. Multiple .Fl t flags may be specified. t Fl w Ar file Read raw connect time data from .Ar file instead of the default file
a /var/log/wtmp . t Ar users ... Display totals for the given individuals only. .El
p If no arguments are given, .Nm displays the total amount of login time for all active accounts on the system.
p The default
a wtmp file is an infinitely increasing file unless frequently truncated. This is normally done by the daily daemon scripts scheduled by .Xr cron 8 , which rename and rotate the
a wtmp files before truncating them (and keep about a week's worth on hand). No login times are collected, however, if the file does not exist.
p For example, d -literal -offset indent ac -p -t "ttyd*" \*[Gt] modems ac -p -t "!ttyd*" \*[Gt] other .Ed
p allows times recorded in
a modems to be charged out at a different rate than
a other .
p The .Nm utility exits 0 on success, and \*[Gt]0 if a fatal error occurs. .Sh FILES l -tag -width /var/log/wtmp.[0-7] -compact t Pa /var/log/wtmp connect time accounting file t Pa /var/log/wtmp.[0-7] rotated files .El .Sh SEE ALSO .Xr login 1 , .Xr utmp 5 , .Xr init 8 , .Xr sa 8 .Sh HISTORY An .Nm command appeared in .At v6 . This version of .Nm was written for .Nx 1.0 from the specification provided by various systems' manual pages.