db_load(8)db_load(8)NAMEdb_load - Loads standard input to a database files (Enhanced Security)
SYNOPSIS
/usr/tcb/bin/db_load [-nT] [-c name=value] [-f file] [-h home] [-t
btree | hash | recno] db_file
OPTIONS
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 speci‐
fies 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 over‐
write 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 (\) char‐
acters are special, is applied to the text input. Newline char‐
acters are interpreted as record separators. Backslash charac‐
ters 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 back‐
slash character precedes any other character, the two characters
following the backslash will be interpreted as hexadecimal spec‐
ification of a single character, that is, \0a is a newline char‐
acter in the ASCII character set.
For this reason, any backslash or newline characters that natu‐
rally occur in the text input must be escaped to avoid misinter‐
pretation 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.
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_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 sup‐
ported means of loading records correctly into the security databases.
RETURN VALUES
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
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
Files: authcap(4)
Commands: edauth(8), db_dump(8)db_load(8)
