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UTMPX(5)                 DragonFly File Formats Manual                UTMPX(5)


NAME

     utmpx, wtmpx, lastlogx - user accounting database


SYNOPSIS

     #include <utmpx.h>


DESCRIPTION

     In contrast to the formerly used legacy utmp and wtmp, the extended
     databases in utmpx and wtmpx reserve more space for logging hostnames,
     and also information on a process' ID, termination signal and exit
     status.

     The <utmpx.h> header defines the structures and functions for logging
     user.  Currently logged in users are tracked in /var/run/utmpx, a list of
     all logins and logouts, as well as all shutdowns, reboots and date
     changes, is kept in /var/log/wtmpx, and the last login of each user is
     noted in /var/log/lastlogx.

     The interface to the utmpx file is described in getutxent(3).

     The wtmpx file can grow rapidly on busy systems, and is normally rotated
     with newsyslog(8).

     In the event of a date change, a shutdown, or a reboot, the following
     items are logged in the wtmpx file:
           date        The system time has been manually or automatically
                       updated by date(1).  The command name date is recorded
                       in the field ut_name.  In the field ut_line, the
                       character `|' indicates the time prior to the change,
                       and the character `{' indicates the new time.
           reboot
           shutdown    A system reboot or shutdown has been initiated.  The
                       character `~' is placed in the field ut_line, and
                       reboot or shutdown in the field ut_name (see
                       shutdown(8) and reboot(8)), using logwtmpx(3).


FILES

     /var/run/utmpx     The utmpx file.
     /var/log/wtmpx     The wtmpx file.
     /var/log/lastlogx  The lastlogx file.


SEE ALSO

     last(1), login(1), rwho(1), w(1), who(1), wtmpcvt(1), endutxent(3),
     logwtmpx(3), ac(8), init(8), newsyslog(8), reboot(8)

DragonFly 5.7-DEVELOPMENT     September 11, 2019     DragonFly 5.7-DEVELOPMENT

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