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ac(8) [opendarwin man page]

AC(8)							    BSD System Manager's Manual 						     AC(8)

NAME
ac -- display connect time accounting SYNOPSIS
ac [-d] [-p] [-w file] [users ...] DESCRIPTION
If the file /var/log/wtmp exists, a record of individual login and logout times are written to it by init(8) and login(8) respectively. The program ac examines these records and writes the accumulated connect time for all logins to the standard output. Options available: -d Display the connect times in 24 hour chunks. -p Display individual user totals. -w file Read raw connect time data from file 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 amount of login time for all active accounts on the system. The default wtmp file is an infinitely increasing file unless frequently truncated. This is normally done by the daily daemon scripts sched- uled by cron(8) which rename and rotate the wtmp files before truncating them (and keeping about a weeks worth on hand). No login times are collected however, if the file does not exist. FILES
/var/log/wtmp /var/log/wtmp.[0-7] rotated files SEE ALSO
init(8), sa(8), login(1), utmp(5). HISTORY
A ac command appeared in Version 6 AT&T UNIX. 4th Berkeley Distribution April 19, 1994 4th Berkeley Distribution

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AC(8)							    BSD System Manager's Manual 						     AC(8)

NAME
ac -- connect time accounting SYNOPSIS
ac [-dp] [-t tty] [-w wtmp] [users ...] DESCRIPTION
If the file /var/log/utx.log exists, a record of individual login and logout times are written to it by login(1) and init(8), respectively. The ac utility examines these records and writes the accumulated connect time (in hours) 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/utx.log. 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 utx.log. The default utx.log 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 utx.log files, keeping a week's worth of data on hand. No login or connect time accounting is performed if /var/log/utx.log does not exist. FILES
/var/log/utx.log connect time accounting file EXIT STATUS
The ac utility exits 0 on success, and >0 if an error occurs. EXAMPLES
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 SEE ALSO
login(1), getutxent(3), init(8), sa(8) BSD
January 21, 2010 BSD

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