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Annotation of researchv10dc/man/man5/utmp.5, revision 1.1

1.1     ! root        1: .TH UTMP 5
        !             2: .CT 1 sa_mortals
        !             3: .SH NAME
        !             4: utmp, wtmp \- login records
        !             5: .SH SYNOPSIS
        !             6: .B #include <utmp.h>
        !             7: .SH DESCRIPTION
        !             8: The
        !             9: .I utmp
        !            10: file allows one to discover information about who is currently
        !            11: logged in.
        !            12: The file is a sequence of entries with the following
        !            13: structure declared in the include file:
        !            14: .IP
        !            15: .EX
        !            16: .ta .5i +.5i +\w'ut_name[8];  'u
        !            17: struct utmp {
        !            18:        char    ut_line[8];             /* tty name */
        !            19:        char    ut_name[8];             /* user id */
        !            20:        long    ut_time;                /* time on */
        !            21: };
        !            22: .EE
        !            23: .PP
        !            24: This structure gives the name of the special file
        !            25: associated with the user's terminal, the user's login name,
        !            26: and the time of the login in the form of
        !            27: .IR time (2).
        !            28: .PP
        !            29: The
        !            30: .I wtmp
        !            31: file records logins and logouts.
        !            32: Its format is exactly like
        !            33: .I utmp
        !            34: except that
        !            35: a null user name indicates a logout on the associated
        !            36: terminal.
        !            37: Furthermore, the terminal name 
        !            38: .L ~
        !            39: indicates that the
        !            40: system was rebooted at the indicated time;
        !            41: the adjacent pair of entries with terminal names
        !            42: .L |
        !            43: and 
        !            44: .L }
        !            45: indicate the system-maintained time
        !            46: just before and just after a
        !            47: .IR date (1)
        !            48: command changed the system's idea of the time.
        !            49: .PP
        !            50: .I Wtmp
        !            51: is maintained by
        !            52: .IR login (8)
        !            53: and
        !            54: .IR init (8).
        !            55: Neither of these programs creates the file,
        !            56: so if it is removed record-keeping is turned off.
        !            57: It is summarized by
        !            58: .IR ac (8).
        !            59: .SH FILES
        !            60: .F /etc/utmp
        !            61: .br
        !            62: .F /usr/adm/wtmp
        !            63: .SH "SEE ALSO"
        !            64: .IR login (8), 
        !            65: .IR init (8), 
        !            66: .IR who (1), 
        !            67: .IR ac (8)

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