AC(1M) AC(1M)
NAME
ac - login accounting
SYNOPSIS
ac [ -w wtmp ] [ -p ] [ -d ] [ people ] ...
DESCRIPTION
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. -w is used to specify an alternate
wtmp file. -p prints individual totals; without this
option, only totals are printed. -d causes a 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, /usr/adm/wtmp is used.
The accounting file /usr/adm/wtmp is maintained by init and
login. 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.
FILES
/usr/adm/wtmp
SEE ALSO
init(8), login(1), utmp(5).