4.3BSD-UWisc/man/cat8/ac.8
AC(8) UNIX Programmer's Manual AC(8)
NAME
ac - login accounting
SYNOPSIS
/etc/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. -w is used to specify an alternate
_w_t_m_p file. -p prints individual totals; without this
option, only totals are printed. -d causes a printout for
each midnight to midnight period. 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 and
_l_o_g_i_n. 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
SEE ALSO
init(8), sa(8), login(1), utmp(5).
Printed 12/27/86 April 27, 1985 1