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Annotation of src/usr.bin/who/who.1, Revision 1.7

1.7     ! aaron       1: .\"    $OpenBSD: who.1,v 1.6 1998/11/11 23:01:51 aaron Exp $
1.1       deraadt     2: .\"    $NetBSD: who.1,v 1.5 1994/12/07 04:28:47 jtc Exp $
                      3: .\"
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                     23: .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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                     35: .\"     @(#)who.1      8.2 (Berkeley) 12/30/93
                     36: .\"
                     37: .Dd December 6, 1994
                     38: .Dt WHO 1
                     39: .Os
                     40: .Sh NAME
                     41: .Nm who
                     42: .Nd display who is logged in
                     43: .Sh SYNOPSIS
                     44: .Nm who
                     45: .Op Fl mTu
1.7     ! aaron      46: .Op Ar file
1.1       deraadt    47: .Nm who
                     48: .Ar am i
                     49: .Sh DESCRIPTION
1.7     ! aaron      50: The
        !            51: .Nm
1.1       deraadt    52: utility displays a list of all users currently logged on, showing for
                     53: each user the login name, tty name, the date and time of login, and
                     54: hostname if not local.
                     55: .Pp
                     56: Available options:
                     57: .Bl -tag -width file
                     58: .It Fl m
                     59: Only print information about the current terminal.  This is the
                     60: .Tn POSIX
                     61: way of saying
1.7     ! aaron      62: .Nm
1.1       deraadt    63: .Ar am i .
1.4       denny      64: .It Fl q
                     65: (Quick.) List only the names and the number of users currently
                     66: logged on. When this option is used, all other options are ignored.
1.1       deraadt    67: .It Fl T
                     68: Print a character after the user name indicating the state of the
                     69: terminal line:
1.7     ! aaron      70: .Sq +
1.1       deraadt    71: if the terminal is writable;
1.7     ! aaron      72: .Sq \-
1.1       deraadt    73: if it is not;
                     74: and
                     75: .Sq ?
                     76: if a bad line is encountered.
                     77: .It Fl u
                     78: Print the idle time for each user.
1.3       flipk      79: .It Fl H
                     80: Write column headings above the regular output.
1.1       deraadt    81: .It Ar \&am I
1.7     ! aaron      82: Returns the invoker's real user name.
1.1       deraadt    83: .It Ar file
                     84: By default,
1.7     ! aaron      85: .Nm
1.1       deraadt    86: gathers information from the file
                     87: .Pa /var/run/utmp .
                     88: An alternate
                     89: .Ar file
                     90: may be specified which is usually
                     91: .Pa /var/log/wtmp
                     92: (or
                     93: .Pa /var/log/wtmp.[0-6]
                     94: depending on site policy as
                     95: .Pa wtmp
                     96: can grow quite large and daily versions may or may not
                     97: be kept around after compression by
                     98: .Xr ac 8 ) .
                     99: The
                    100: .Pa wtmp
                    101: file contains a record of every login, logout,
                    102: crash, shutdown and date change
                    103: since
                    104: .Pa wtmp
                    105: was last truncated or
                    106: created.
                    107: .El
                    108: .Pp
                    109: If
                    110: .Pa /var/log/wtmp
                    111: is being used as the file, the user name may be empty
1.5       aaron     112: or one of the special characters `|', `}' and `~'.  Logouts produce
1.1       deraadt   113: an output line without any user name.  For more information on the
                    114: special characters, see
                    115: .Xr utmp 5 .
                    116: .Sh FILES
                    117: .Bl -tag -width /var/log/wtmp.[0-6] -compact
                    118: .It Pa /var/run/utmp
                    119: .It Pa /var/log/wtmp
                    120: .It Pa /var/log/wtmp.[0-6]
                    121: .El
                    122: .Sh SEE ALSO
                    123: .Xr last 1 ,
                    124: .Xr mesg 1 ,
                    125: .Xr users 1 ,
                    126: .Xr getuid 2 ,
                    127: .Xr utmp 5
                    128: .Sh HISTORY
                    129: A
                    130: .Nm
                    131: utility appeared in
                    132: .At v6 .
                    133: .Sh STANDARDS
                    134: The
                    135: .Nm
                    136: utility is expected to conform to
                    137: .St -p1003.2-92 .