db_checkpoint(8)db_checkpoint(8)NAMEdb_checkpoint - Periodically checkpoint the security database log
(Enhanced Security)
SYNOPSIS
/usr/tcb/bin/db_checkpoint [-1v] [-h home] [-k bytes] [-L file] [-p
min]
OPTIONS
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 starting running.
db_checkpoint: ### Wed Jun 15 01:23:45 EDT 1995
This file is removed if the db_checkpoint utility exits grace‐
fully. 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.
DESCRIPTION
A customized version of the Berkeley Database (Berkeley DB) is embedded
in the operating system to provide high-performance database support
for critical security files. The DB includes full transactional support
and database recovery, using write-ahead logging and checkpointing to
record changes.
The db_checkpoint utility is a daemon process that monitors the data‐
base log and periodically checkpoints it. Since other database func‐
tions also cause checkpoint records to be written to the log, db_check‐
point 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 Berke‐
ley 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 signal (SIGINT).
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.
RETURN VALUES
The db_checkpoint utility exits 0 on success, and >0 if an error
occurs.
ENVIRONMENT VARIABLES
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.
FILES
/var/tcb/files/auth.db
/var/tcb/files/dblogs/*
SEE ALSO
Commands: db_archive(8), db_printlog(8), db_recover(8), db_stat(8),
secconfig(8)db_checkpoint(8)
