db_load - Loads standard input to a database files
(Enhanced Security)
/usr/tcb/bin/db_load [-nT] [-c name=value] [-f file] [-h
home] [-t btree | hash | recno] db_file
Specify configuration options for the DB_INFO structure
provided to db_open ignoring any value they may have been
based on the input. The command-line format is name=value.
The following keywords are supported: The minimum
number of keys per page. The byte order for integers
in the stored database metadata. The size of
pages used for nodes in the tree, in bytes. The
value of the DB_DUP flag. The density within the
hash table. The size of the hash table. Specify
fixed-length records of the specified length.
Specify the fixed-length record pad character. The
value of the DB_RECNUM flag. The value of the
DB_RENUMBER flag. The parenthetical listing specifies
how the value part of the name=value pair is
interpreted. Items listed as (boolean) expect value
to be 1 (set) or 0 (unset). Items listed as (number)
convert value to a number. Items listed as
(string) use the characters of value directly.
Read from the specified input file, instead of from
the standard input. Specify a home directory for
the database. The correct directory for enhanced
security is /var/tcb/files. Do not overwrite
existing keys in the database when loading into an
already existing database. If a key/data pair cannot
be loaded into the database for this reason, a
warning message is displayed on the standard error
output and the key/data pair are skipped. The -T
option allows non-Berkeley DB applications to easily
load text files into databases.
If the database to be created is of type btree or
hash, the input must be paired lines of text, where
the first line of the pair is the key item, and the
second line of the pair is its corresponding data
item. If the database to be created is of type
recno, the input must be lines of text, where each
line is a new data item for the database.
A simple escape mechanism, where newline and backslash
(\) characters are special, is applied to the
text input. Newline characters are interpreted as
record separators. Backslash characters in the text
will be interpreted in one of two ways: If the
backslash character precedes another backslash
character, the pair will be interpreted as a literal
backslash. If the backslash character precedes
any other character, the two characters following
the backslash will be interpreted as hexadecimal
specification of a single character, that is, \0a
is a newline character in the ASCII character set.
For this reason, any backslash or newline characters
that naturally occur in the text input must be
escaped to avoid misinterpretation by db_load.
If the -T option is specified, the underlying
access method type must be specified using the -t
option. Specifies the underlying access method. If
no -t option is specified, the database will be
loaded into a database of the same type as was
dumped, that is, a hash database is created if a
hash database was dumped.
The btree and hash databases may be converted from
one to the other. The recno databases may not be
converted to any other database type or from any
other database type.
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
record changes.
The db_load utility reads from the standard input and
loads it into the db_file database . The database db_file
is created if it does not already exist.
The input to db_load must be in the output format specified
by the db_dump utility or as specified for the -T
option.
The db_load 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_load to clean up
after itself and exit, send it an interrupt signal (SIGINT).
The db_load utility can be used to load text files into
the security databases. It is used by Tru64 UNIX utilities
and is not recommended for use by system administration.
The edauth utility provides a supported means of loading
records correctly into the security databases.
The db_load utility exits 0 on success, and >0 if one or
more key/data pairs were not loaded into the database
because the key already existed, and with >1 if an error
occurs.
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
/var/tcb/files.
/var/tcb/files/auth.db
/var/tcb/files/dblogs/*
Files: authcap(4)
Commands: edauth(8), db_dump(8)
db_load(8)
[ Back ] |
