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Annotation of 43BSDTahoe/man/man5/utmp.5, revision 1.1.1.1

1.1       root        1: .\" Copyright (c) 1980 Regents of the University of California.
                      2: .\" All rights reserved.  The Berkeley software License Agreement
                      3: .\" specifies the terms and conditions for redistribution.
                      4: .\"
                      5: .\"    @(#)utmp.5      6.3 (Berkeley) 12/9/86
                      6: .\"
                      7: .TH UTMP 5  "December 9, 1986"
                      8: .UC 4
                      9: .SH NAME
                     10: utmp, wtmp \- login records
                     11: .SH SYNOPSIS
                     12: .B #include <utmp.h>
                     13: .SH DESCRIPTION
                     14: The
                     15: .I utmp
                     16: file records information about who is currently using the system.
                     17: The file is a sequence of entries with the following
                     18: structure declared in the include file:
                     19: .RS
                     20: .PP
                     21: .nf
                     22: .so /usr/include/utmp.h
                     23: .fi
                     24: .RE
                     25: .PP
                     26: This structure gives the name of the special file
                     27: associated with the user's terminal, the user's login name,
                     28: and the time of the login in the form of
                     29: .IR time (3C).
                     30: .PP
                     31: The
                     32: .I wtmp
                     33: file records all logins and logouts.
                     34: A null user name indicates a logout on the associated terminal.
                     35: Furthermore, the terminal name `~' indicates that the
                     36: system was rebooted at the indicated time;
                     37: the adjacent pair of entries with terminal names
                     38: `\^|\^' and `{' indicate the system-maintained time just before and just after a
                     39: .I date
                     40: command has changed the system's idea of the time.
                     41: .PP
                     42: .I Wtmp
                     43: is maintained by
                     44: .IR login (1)
                     45: and
                     46: .IR init (8).
                     47: Neither of these programs creates the file,
                     48: so if it is removed record-keeping is turned off.  It is summarized by
                     49: .IR ac (8).
                     50: .SH FILES
                     51: /etc/utmp
                     52: .br
                     53: /usr/adm/wtmp
                     54: .SH "SEE ALSO"
                     55: last(1), login(1), who(1), ac(8), init(8)

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