AC(8) | System Manager's Manual | AC(8) |
ac
— connect time
accounting
ac |
[-dp ] [-t
tty] [-w
wtmp] [user ...] |
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
-p
-t
tty!
’ to
indicate not this tty and end with
‘*
’ to indicate all similarly named
ttys. Multiple -t
flags may be specified.-w
wtmpIf no arguments are given, ac
displays the
total connect time for all accounts with login sessions recorded in
wtmp(5).
The default wtmp file will increase
without bound unless it is truncated. It is normally truncated by
newsyslog(8), which renames and
rotates the wtmp files every week. In order for
ac
to run in sync with the rotation of
wtmp,
newsyslog(8) is configured to run just
after ac
completes.
User accounting information can be mailed weekly to the system administrator: see weekly(8) for more information. No login or connect time accounting is performed if /var/log/wtmp does not exist.
The ac
utility exits 0 on success,
and >0 if an error occurs.
Allow times recorded in modems to be charged out at a different rate than other:
$ ac -p -t "ttyd*" > modems $ ac -p -t "!ttyd*" > other
An ac
command appeared in
Version 5 AT&T UNIX. This version of
ac
was written for NetBSD
0.9A from the specification provided by various systems' manual
pages.
February 8, 2020 | OpenBSD-current |