NAME    [Toc]    [Back]

     ac - connect time accounting

SYNOPSIS    [Toc]    [Back]

     ac [-dp] [-t tty] [-w wtmp] [users ...]

DESCRIPTION    [Toc]    [Back]

     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.  ac examines
 these records and writes the accumulated  connect  time
for all logins
     to the standard output.

     The options are as follows:

     -d      Display the connect times in 24 hour chunks.

     -p      Print individual users' 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 wtmp
             Read connect time data from wtmp 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 connect
time for all accounts
 with login sessions recorded in wtmp.

     The default wtmp file will increase without bound unless  it
is truncated.
     It  is  normally  truncated  by  the  daily  scripts  run by
cron(8), which rename
 and rotate the wtmp files, keeping a  week's  worth  of
data on hand.
     No   login  or  connect  time  accounting  is  performed  if
/var/log/wtmp 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.

     The ac utility exits 0 on success or >0 if a fatal error occurred.

FILES    [Toc]    [Back]

     /var/log/wtmp        connect time accounting file
     /var/log/wtmp.[0-7]  rotated files

SEE ALSO    [Toc]    [Back]

     login(1), utmp(5), init(8), sa(8)

HISTORY    [Toc]    [Back]

     An ac command appeared in Version 6 AT&T UNIX.  This version
of ac was
     written  for  NetBSD 0.9A from the specification provided by
various systems'
 manual pages.

OpenBSD     3.6                          March      15,      1994