SYNOPSIS
kdb get <key name>
Where key name
is the name of the key.
DESCRIPTION
This command is used to retrieve the value of a key.
If you enter a key name
starting with a leading /
, then a cascading lookup will be performed in order to attempt to locate the key. In this case, using the -v
option allows the user to see the full key name of the key if it is found.
LIMITATIONS
Only keys within the mount point or below the <key name>
will be considered during a cascading lookup. A workaround is to pass the -a
option. Use the command kdb get -v <key name>
to see if an override or a fallback was considered by the lookup.
RETURN VALUES
This command will return the following values as an exit status:
- 0: No errors.
- 1-10: standard exit codes, see kdb(1)
- 11: No key found.
OPTIONS
-H
, --help
: Show the man page.
-V
, --version
: Print version info.
-p
, --profile <profile>
: Use a different kdb profile.
-C
, --color <when>
: Print never/auto(default)/always colored output.
-a
, --all
: Consider all of the keys.
-n
, --no-newline
: Suppress the newline at the end of the output.
-v
, --verbose
: Explain what is happening. Gives a complete trace of all tried keys. Very useful to debug fallback and overrides.
-d
, --debug
: Give debug information. Prints additional debug information in case of errors/warnings.
EXAMPLES
# Backup-and-Restore: user:/tests/get/examples
# We use the `dump` plugin, since some storage plugins, e.g. INI,
# create intermediate keys.
sudo kdb mount get.ecf user:/tests/get/examples/kdb-get dump
sudo kdb mount get.ecf spec:/tests/get/examples/kdb-get dump
# Create the keys we use for the examples
kdb set user:/tests/get/examples/kdb-get/key myKey
kdb meta-set spec:/tests/get/examples/kdb-get/anotherKey default defaultValue
# To get the value of a key:
kdb get user:/tests/get/examples/kdb-get/key
#> myKey
# To get the value of a key using a cascading lookup:
kdb get /tests/get/examples/kdb-get/key
#> myKey
# To get the value of a key without adding a newline to the end of it:
kdb get -n /tests/get/examples/kdb-get/key
#> myKey
# To explain why a specific key was used (for cascading keys):
kdb get -v /tests/get/examples/kdb-get/key
#> got 3 keys
#> searching spec:/tests/get/examples/kdb-get/key, found: <nothing>, options: KDB_O_CALLBACK
#> searching proc:/tests/get/examples/kdb-get/key, found: <nothing>
#> searching dir:/tests/get/examples/kdb-get/key, found: <nothing>
#> searching user:/tests/get/examples/kdb-get/key, found: user:/tests/get/examples/kdb-get/key
#> The resulting keyname is user:/tests/get/examples/kdb-get/key
#> The resulting value size is 6
#> myKey
# Output if only a default value is set for a key:
kdb get -v /tests/get/examples/kdb-get/anotherKey
#> got 3 keys
#> searching spec:/tests/get/examples/kdb-get/anotherKey, found: spec:/tests/get/examples/kdb-get/anotherKey, options: KDB_O_CALLBACK
#> The key was not found in any other namespace, taking the default
#> The resulting keyname is default:/tests/get/examples/kdb-get/anotherKey
#> The resulting value size is 13
#> defaultValue
kdb rm user:/tests/get/examples/kdb-get/key
kdb rm spec:/tests/get/examples/kdb-get/anotherKey
sudo kdb umount user:/tests/get/examples/kdb-get
sudo kdb umount spec:/tests/get/examples/kdb-get
To use bookmarks:
kdb get +kdb/format
This command will actually get user:/sw/elektra/kdb/#0/current/format
if the bookmarks commands from kdb-set(1) man pages are executed before.
SEE ALSO