ac.tproj/ac.8

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  32 .\"     @(#)ac.8        8.2 (Berkeley) 4/19/94
  33 .\"
  34 .Dd April 19, 1994
  35 .Dt AC 8
  36 .Os BSD 4
  37 .Sh NAME
  38 .Nm ac
  39 .Nd display connect time accounting
  40 .Sh SYNOPSIS
  41 .Nm ac
  42 .Op Fl d
  43 .Op Fl p
  44 .Op Fl w Ar file
  45 .Op Ar users ...
  46 .Sh DESCRIPTION
  47 If the file
  48 .Pa /var/log/wtmp
  49 exists,
  50 a record of individual
  51 login and logout times are written to it by
  52 .Xr init 8
  53 and
  54 .Xr login 8
  55 respectively.
  56 The program
  57 .Nm ac
  58 examines these
  59 records and writes the accumulated connect time for all logins to the
  60 standard output.
  61 .Pp
  62 Options available:
  63 .Bl -tag -width people
  64 .It Fl d
  65 Display the connect times in 24 hour chunks.
  66 .It Fl p
  67 Display individual user totals.
  68 .It Fl w Ar file
  69 Read raw connect time data from
  70 .Ar file
  71 instead of the default file
  72 .Pa /var/log/wtmp .
  73 .It Ar users ...
  74 Display totals for the given individuals
  75 only.
  76 .El
  77 .Pp
  78 If no arguments are given,
  79 .Nm
  80 displays the total amount of login time for all active accounts on the
  81 system.
  82 .Pp
  83 The default
  84 .Pa wtmp
  85 file is an infinitely increasing file
  86 unless frequently truncated.  This is normally
  87 done by the daily daemon scripts scheduled by
  88 .Xr cron 8
  89 which rename and rotate the
  90 .Pa wtmp
  91 files before truncating them (and keeping about a weeks worth on hand).
  92 No login times are collected however, if the file does not exist.
  93 .Sh FILES
  94 .Bl -tag -width /var/log/wtmp.[0-7] -compact
  95 .It Pa /var/log/wtmp
  96 .It Pa /var/log/wtmp.[0-7]
  97 rotated files
  98 .El
  99 .Sh SEE ALSO
 100 .Xr init 8 ,
 101 .Xr sa 8 ,
 102 .Xr login 1 ,
 103 .Xr utmp 5 .
 104 .Sh HISTORY
 105 A
 106 .Nm
 107 command appeared in Version 6 AT&T UNIX.