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+.TH AC 8
+.CT 1 sa_nonmortals
+.SH NAME
+ac \- login accounting
+.SH SYNOPSIS
+.B /etc/ac
+[
+.I option ...
+]
+[
+.I person ...
+]
+.SH DESCRIPTION
+.I Ac
+prints the total connect time
+recorded in the accounting file,
+.FR /usr/adm/wtmp .
+If
+.I persons
+are named, only those login names are considered.
+The options are
+.TP
+.BI -w " file"
+Use
+.I file
+instead of 
+.FR /usr/adm/wtmp ;
+.L -
+means the standard input.
+.TP
+.B -p
+Print total connect time for each
+user.
+.TP
+.B -d
+Print totals for each day.
+.PP
+The accounting file
+.F /usr/adm/wtmp
+is maintained by
+.I init 
+and
+.IR login (8),
+provided it exists.
+To start accounting, create it with length 0.
+When accounting is turned on, the file grows without limit.
+It is prudent periodically
+to process the data and truncate the file.
+.SH FILES
+.F /usr/adm/wtmp
+.SH "SEE ALSO"
+.IR init (8), 
+.IR sa (8), 
+.IR login (8), 
+.IR utmp (5), 
+.IR who (1)