2.9BSD/usr/man/cat8/ac.8

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AC(8)               UNIX Programmer's Manual                AC(8)

NAME
     ac - login accounting

SYNOPSIS
     ac [ -w wtmp ] [ -p ] [ -d ] [ people ] ...

DESCRIPTION
     _A_c produces a printout giving connect time for each user who
     has logged in during the life of the current _w_t_m_p file.  A
     total is also produced.  Options are:

     -d   Causes a printout for each midnight to midnight period.

     -p   Print individual totals; without this option only
          totals are printed.

     -w   Use _w_t_m_p as an alternate accounting data file.  Any
          _p_e_o_p_l_e will limit the printout to only the specified
          login names.  If no _w_t_m_p file is given, /_u_s_r/_a_d_m/_w_t_m_p
          is used.

     The accounting file, /_u_s_r/_a_d_m/_w_t_m_p, is maintained by _i_n_i_t(8)
     and _l_o_g_i_n(1).  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       default accounting file

SEE ALSO
     login(1), utmp(5), init(8)

Printed 8/2/83                                                  1