NAME
utmpx, wtmpx,
lastlogx —
user accounting database
SYNOPSIS
#include
<utmpx.h>
DESCRIPTION
In contrast to 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. rebootshutdown- A system reboot or shutdown has been initiated. The character
‘
~’ is placed in the field ut_line, andrebootorshutdownin the field ut_name (see shutdown(8) and reboot(8)), using logwtmpx(3).
FILES
- /var/run/utmpx
- The
utmpxfile. - /var/log/wtmpx
- The
wtmpxfile. - /var/log/lastlogx
- The
lastlogxfile.
SEE ALSO
last(1), login(1), rwho(1), w(1), who(1), endutxent(3), logwtmpx(3), utmp(5), ac(8), init(8), newsyslog(8), reboot(8)