db_checkpoint - Periodically checkpoint the security
database log (Enhanced Security)
/usr/tcb/bin/db_checkpoint [-1v] [-h home] [-k bytes] [-L
file] [-p min]
Checkpoint the log once, and then exit. Specify a home
directory for the database. The correct directory for
enhanced security is /var/tcb/files. Checkpoint the
database at least as often as every kbytes of log file
written. Log the execution of the db_checkpoint utility
to the specified file in the following format, where ###
is the process ID, and the date is the time the utility
db_checkpoint: ### Wed Jun 15 01:23:45 EDT 1995
This file is removed if the db_checkpoint utility
exits gracefully. Checkpoint the database at least
every min minutes. Write the time of each checkpoint
to the standard output.
At least one of the -1, -k and -p options must be specified.
A customized version of the Berkeley Database (Berkeley
DB) is embedded in the operating system to provide highperformance
database support for critical security files.
The DB includes full transactional support and database
recovery, using write-ahead logging and checkpointing to
The db_checkpoint utility is a daemon process that monitors
the database log and periodically checkpoints it.
Since other database functions also cause checkpoint
records to be written to the log, db_checkpoint is normally
used as a one-time function to guarantee a checkpoint
before archiving the database.
The db_checkpoint utility utility attaches to one or more
of the Berkeley DB shared memory regions. In order to
avoid region corruption, it should always be given the
chance to detach and exit gracefully. To cause db_checkpoint
to clean up after itself and exit, send it an interrupt
The db_checkpoint utility does not attempt to create the
Berkeley DB shared memory regions if they do not already
exist. The application which creates the region should be
started first, and then, once the region is created, the
db_checkpoint utility should be started.
The db_checkpoint utility exits 0 on success, and >0 if an
ENVIRONMENT VARIABLES [Toc] [Back]
If the -h option is not specified and the environment
variable DB_HOME is set, it is used as the path of the
database home. The home directory for security is
Commands: db_archive(8), db_printlog(8), db_recover(8),
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