utmpd(1M)utmpd(1M)NAMEutmpd - user accounting database daemon
user accounting database daemon, manages the user accounting database
which is the database of currently logged-in users. This was previ‐
ously maintained by and files on HP-UX.
Upon startup, writes its pid to the file Applications can add, update,
or query entries into the database using the APIs. See the getuts(3C)
manual page for more information.
utmpd(1M) takes care of synchronizing the legacy file and its own in-
memory database. The synchronization is bi-directional from the data‐
base to the and from the file to database. However, this synchroniza‐
tion does not happen in real time. There is a time lag which could
span from a few seconds on a lightly loaded system to a few minutes on
a heavily loaded system.
Perform graceful shutdown.
This causes the daemon to write its in-memory
user accounting database to the file and exit.
logs error messages to the system log using syslog(3C).
If is shutdown using synchronization between file and the file does not
take place. should not be shutdown by the user unless it is for debug‐
ging purpose. On restart, utmpd(1M) rebuilds its database from the
was developed by Hewlett-Packard Company.
FILESSEE ALSOrlogind(1), telnetd(1), who(1), init(1M), bwtmps(3C), getuts(3C),
getutx(3C), btmps(4), utmp(4), utmpx(4), wtmps(4).