db_dump, db_dump185 - Reads and writes the security
databases (Enhanced Security)
/usr/tcb/bin/db_dump [-dN] [-f output] db_file
[/usr/tcb/bin/db_dump] [-p] [-f output] [-h home] db_file
[/usr/tcb/bin/db_dump185] [-p] [-f output] db_file
Dump the specified database in a format helpful for debugging
the Berkeley DB library routines. The output format
of the -d option is not standard and may change without
notice between releases of the Berkeley DB library. Write
to the specified file instead of to the standard output
Specify a home directory for the database. The correct
directory for enhanced security is /var/tcb/files. Do not
acquire shared region locks while searching the database.
This option is intended only for debugging and should not
be used under any other circumstances. If characters in
either the key or data items are printing characters (as
defined by isprint, use printing characters in file to
represent them. This option permits users to use standard
text editors and tools to modify the contents of
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_dump utility reads the security database file
db_file and writes it to the standard output using a
portable flat-text format understood by the db_load utility.
The db_dump and db_dump185 utilities are included in Tru64
UNIX for use by installation and update utilities, and are
not recommended for use by system administration. The
edauth utility provides a supported means of copying
records from the security databases.
Earlier versions of Tru64 UNIX used Version 1.85 of the
Berkeley DB for enhanced security databases. So the
db_dump185 utility, which is similar to the db_dump utility
except that it reads databases in the format used by
Berkeley DB Versions 1.85 and 1.86, is included with Tru64
Dumping and reloading hash databases that use user-defined
hash functions will result in new databases that use the
default hash function. While using the default hash function
may not be optimal for the new database, it will continue
to work correctly.
Dumping and reloading btree databases that use a userdefined
prefix or comparison functions results in new
databases that use the default prefix and comparison functions.
In this case, it is quite likely that the database
will be damaged beyond repair permitting neither record
storage or retrieval.
The only available workaround for either case is to modify
the sources for the db_load utility to load the database
using the correct hash, prefix and comparison functions.
The db_dump utility exits 0 on success, and >0 if an error
The db_dump185 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: edauth(8), db_load(8)
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