db_checkpoint - Periodically checkpoint the security database log (Enhanced
/usr/tcb/bin/db_checkpoint [-1v] [-h home]
[-k bytes] [-L file] [-p min]
-1 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
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 starting running.
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.
-v 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 high-performance database support for crit-
ical security files. The DB includes full transactional support and data-
base recovery, using write-ahead logging and checkpointing to record
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 nor-
mally used as a one-time function to guarantee a checkpoint before archiv-
ing 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 sig-
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 error occurs.
DB_HOME 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 /var/tcb/files.
Commands: db_archive(8), db_printlog(8), db_recover(8), db_stat(8), seccon-