Ausam/doc/man/man1/who.1

.th WHO I 3/4/78
.sh NAME
who  \*-  who is on the system
.sh SYNOPSIS
.bd who
[[[-]f...] ... ]
[ who-file ] [
.bd "am I"
]
.sh DESCRIPTION
.it Who,
without an argument,
lists the name, typewriter channel, and login time
for each current UNIX user.
.s3
There are various flags which list appropriate fields
from the AUSAM password entries:
.lp +20 8
f	first name
.lp +20 8
l	last name
.lp +20 8
o	other ( may be many lines! )
.lp +20 8
d	initial directory
.lp +20 8
s	initial shell
.lp +20 8
C	class mask (translated)
.i0
.dt
.s3
There is also a flag for using
.it who
on fast screens :-
.bd c,
which outputs 20 lines and then waits for a
.it CR
to be typed.
.fl
.s3
Without an argument,
.it who
examines the /etc/utmp
file to obtain its information.
If a file is given, that file is examined.
Typically the given file will be /usr/adm/wtmp,
which contains a record of all the logins since it
was created.
Then
.it who
lists
logins, logouts, and crashes since the creation of
the wtmp file.
Each login is listed with user name,
typewriter name (with `/dev/'
suppressed),
and date and time.
Also,
non-login entries produce suitably descriptive comments.
.fl
.s3
With two arguments,
.it who
behaves as if it had no arguments except for restricting
the printout to the line for the current typewriter.
Thus `who am I' (and also `who are you')
tells you who you are logged in as.
.sh FILES
/etc/utmp
.br
/etc/passwd
.sh "SEE ALSO"
utmp(V), wtmp(V),
.br
su(VIII), getty(VIII), init(VIII), AUSAM(VIII).
.sh DIAGNOSTICS
"bad wtmp" \*- bad entry in [uw]tmp file.
.sh BUGS