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Annotation of 43BSDReno/share/man/man5/utmp.5, revision 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      6.6 (Berkeley) 6/23/90
        !             6: .\"
        !             7: .TH UTMP 5  "June 23, 1990"
        !             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 structure, as
        !            18: defined in the include file.
        !            19: .RS
        !            20: .PP
        !            21: .nf
        !            22: #define UT_NAMESIZE    8
        !            23: #define UT_LINESIZE    8
        !            24: #define UT_HOSTSIZE    16
        !            25: struct utmp {
        !            26:        char    ut_line[UT_NAMESIZE];
        !            27:        char    ut_name[UT_LINESIZE];
        !            28:        char    ut_host[UT_HOSTSIZE];
        !            29:        time_t  ut_time;
        !            30: };
        !            31: .ft R
        !            32: .ad
        !            33: .fi
        !            34: .RE
        !            35: .PP
        !            36: This structure gives the name of the special file
        !            37: associated with the user's terminal, the user's login name,
        !            38: and the time of the login in the form of
        !            39: .IR time (3).
        !            40: .PP
        !            41: The
        !            42: .I wtmp
        !            43: file records all logins and logouts.
        !            44: A null user name indicates a logout on the associated terminal.
        !            45: Furthermore, the terminal name `~' indicates that the system was
        !            46: rebooted at the indicated time; in such cases the name will be
        !            47: ``shutdown''.  An adjacent pair of entries with terminal names
        !            48: `\^|\^' and `{' indicate the system-maintained time just before
        !            49: and just after a
        !            50: .I date
        !            51: command has changed the system's idea of the time.  The name for
        !            52: both entries will be ``date''.
        !            53: .PP
        !            54: .I Wtmp
        !            55: is maintained by
        !            56: .IR login (1)
        !            57: and
        !            58: .IR init (8).
        !            59: Neither of these programs creates the file, so if it is removed
        !            60: record-keeping is turned off.  It is summarized by
        !            61: .IR last (1)
        !            62: and
        !            63: .IR ac (8).
        !            64: .SH FILES
        !            65: /var/run/utmp
        !            66: .br
        !            67: /var/log/wtmp
        !            68: .SH "SEE ALSO"
        !            69: last(1), login(1), who(1), ac(8), init(8)

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