wtmpx(5) - NetBSD Manual Pages

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UTMPX(5)                  NetBSD File Formats Manual                  UTMPX(5)

utmpx, wtmpx, lastlogx -- user accounting database
#include <utmpx.h>
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 files are not automatically created if they do not exist; they must be created manually. 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 char- acter `|' 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).
/var/run/utmpx The utmpx file. /var/log/wtmpx The wtmpx file. /var/log/lastlogx The lastlogx file.
last(1), login(1), rwho(1), w(1), who(1), endutxent(3), logwtmpx(3), utmp(5), ac(8), init(8), newsyslog(8), reboot(8) NetBSD 4.0 September 18, 2006 NetBSD 4.0
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