AC(8) System Manager's Manual AC(8)
ac - login accounting
/usr/etc/ac [ -w wtmp ] [ -p ] [ -d ] [ username ] ...
ac produces a printout giving connect time for each user who has logged
in during the life of the current wtmp file. A total is also produced.
The accounting file /var/adm/wtmp is maintained by init(8) and
login(1). Neither of these programs creates the file, so if it does
not exist no connect-time accounting is done. To start accounting, it
should be created with length 0. On the other hand if the file is left
undisturbed it will grow without bound, so periodically any information
desired should be collected and the file truncated.
Specify an alternate wtmp file.
-p Print individual totals; without this option, only totals are
-d Printout for each midnight to midnight period. Any people will
limit the printout to only the specified login names. If no
wtmp file is given, /var/adm/wtmp is used.
login(1), utmp(5V), init(8), sa(8)
9 September 1987 AC(8)