Annotation of src/usr.bin/who/who.1, Revision 1.4
1.4 ! denny 1: .\" $OpenBSD: who.1,v 1.3 1997/07/28 17:38:53 flipk Exp $
1.1 deraadt 2: .\" $NetBSD: who.1,v 1.5 1994/12/07 04:28:47 jtc Exp $
3: .\"
4: .\" Copyright (c) 1986, 1991, 1993
5: .\" The Regents of the University of California. All rights reserved.
6: .\"
7: .\" Redistribution and use in source and binary forms, with or without
8: .\" modification, are permitted provided that the following conditions
9: .\" are met:
10: .\" 1. Redistributions of source code must retain the above copyright
11: .\" notice, this list of conditions and the following disclaimer.
12: .\" 2. Redistributions in binary form must reproduce the above copyright
13: .\" notice, this list of conditions and the following disclaimer in the
14: .\" documentation and/or other materials provided with the distribution.
15: .\" 3. All advertising materials mentioning features or use of this software
16: .\" must display the following acknowledgement:
17: .\" This product includes software developed by the University of
18: .\" California, Berkeley and its contributors.
19: .\" 4. Neither the name of the University nor the names of its contributors
20: .\" may be used to endorse or promote products derived from this software
21: .\" without specific prior written permission.
22: .\"
23: .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24: .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27: .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: .\" SUCH DAMAGE.
34: .\"
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
46: .Op Ar file
47: .Nm who
48: .Ar am i
49: .Sh DESCRIPTION
50: The
51: .Nm who
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: .Pp
58: .Bl -tag -width file
59: .It Fl m
60: Only print information about the current terminal. This is the
61: .Tn POSIX
62: way of saying
63: .Nm who
64: .Ar am i .
1.4 ! denny 65: .It Fl q
! 66: (Quick.) List only the names and the number of users currently
! 67: logged on. When this option is used, all other options are ignored.
1.1 deraadt 68: .It Fl T
69: Print a character after the user name indicating the state of the
70: terminal line:
71: .Sq +
72: if the terminal is writable;
73: .Sq -
74: if it is not;
75: and
76: .Sq ?
77: if a bad line is encountered.
78: .It Fl u
79: Print the idle time for each user.
1.3 flipk 80: .It Fl H
81: Write column headings above the regular output.
1.1 deraadt 82: .It Ar \&am I
83: Returns the invoker's real user name.
84: .It Ar file
85: By default,
86: .Nm who
87: gathers information from the file
88: .Pa /var/run/utmp .
89: An alternate
90: .Ar file
91: may be specified which is usually
92: .Pa /var/log/wtmp
93: (or
94: .Pa /var/log/wtmp.[0-6]
95: depending on site policy as
96: .Pa wtmp
97: can grow quite large and daily versions may or may not
98: be kept around after compression by
99: .Xr ac 8 ) .
100: The
101: .Pa wtmp
102: file contains a record of every login, logout,
103: crash, shutdown and date change
104: since
105: .Pa wtmp
106: was last truncated or
107: created.
108: .El
109: .Pp
110: If
111: .Pa /var/log/wtmp
112: is being used as the file, the user name may be empty
113: or one of the special characters '|', '}' and '~'. Logouts produce
114: an output line without any user name. For more information on the
115: special characters, see
116: .Xr utmp 5 .
117: .Sh FILES
118: .Bl -tag -width /var/log/wtmp.[0-6] -compact
119: .It Pa /var/run/utmp
120: .It Pa /var/log/wtmp
121: .It Pa /var/log/wtmp.[0-6]
122: .El
123: .Sh SEE ALSO
124: .Xr last 1 ,
125: .Xr mesg 1 ,
126: .Xr users 1 ,
127: .Xr getuid 2 ,
128: .Xr utmp 5
129: .Sh HISTORY
130: A
131: .Nm
132: utility appeared in
133: .At v6 .
134: .Sh STANDARDS
135: The
136: .Nm
137: utility is expected to conform to
138: .St -p1003.2-92 .