.bp 
.au "TSC \- intro.xx"

.c
The hwo Program

.2
\f(BIhwo\fB is a rewrite of the 
standard 
\f(BIwho\fB program, but with a twist: it tries
to tell you who's using a tty even if they don't have 
an entry in 
the 
.T /etc/utmp
file.

.2
This is useful for xterm entries, amongst other things.

.2
We decide a line is being used if the tty's mtime is under
5 minutes old.

.2
As written, this program only works on BSD-type systems, 
as it ``knows'' the layout of the utmp file and the relationship
between that and tty information.
.bp 
.au "TSC \- intro.xx"

.c
Sample hwo Output

.b
tchrist   console   Aug 11 13:18   
.sp .5
shawn     ttyb      Aug 14 20:14   
.sp .5
(tchrist) ttyp0    (Aug 15 16:13)  
.sp .5
(tchrist) ttyp1    (Aug 14 04:21)  
.sp .5
(tchrist) ttyp2    (Aug 15 15:15)  
.sp .5
(tchrist) ttyp3    (Aug 15 16:13)  
.e