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Command: ac | Section: 8 | Source: NetBSD | File: ac.8
AC(8) FreeBSD System Manager's Manual AC(8)
NAME
ac - display connect time accounting
SYNOPSIS
ac [-d | -p] [-t tty] [-w file] [users ...]
DESCRIPTION
If the file /var/log/wtmp exists, a record of individual login and logout
times are written to it by login(1) and init(8), respectively. The
program ac examines these records and writes the accumulated connect time
for all logins to the standard output.
Options available:
-d Display the connect times in 24 hour chunks.
-p Display individual user totals.
-t tty Only do accounting logins on certain ttys. The tty
specification can start with `!' to indicate not this tty and
end with `*' to indicate all similarly named ttys. Multiple
-t flags may be specified.
-w file Read raw connect time data from file instead of the default
file /var/log/wtmp.
users ... Display totals for the given individuals only.
If no arguments are given, ac displays the total amount of login time for
all active accounts on the system.
The default wtmp file is an infinitely increasing file unless frequently
truncated. This is normally done by the daily daemon scripts scheduled
by cron(8), which rename and rotate the 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.
For example,
ac -p -t "ttyd*" > modems
ac -p -t "!ttyd*" > other
allows times recorded in modems to be charged out at a different rate
than other.
FILES
/var/log/wtmp connect time accounting file
/var/log/wtmp.[0-7] rotated files
EXIT STATUS
The ac utility exits 0 on success, and >0 if an error occurs.
SEE ALSO
login(1), utmp(5), init(8), sa(8)
HISTORY
An ac command appeared in Version 6 AT&T UNIX. This version of ac was
written for NetBSD 1.0 from the specification provided by various
systems' manual pages.
FreeBSD 14.1-RELEASE-p8 April 19, 1994 FreeBSD 14.1-RELEASE-p8