babeltrace-query(1)
===================
:manpagetype: command
:revdate: 5 October 2017


NAME
----
babeltrace-query - Query object from a component class


SYNOPSIS
--------
[verse]
*babeltrace query* ['GENERAL OPTIONS'] [opt:--omit-home-plugin-path]
                 [opt:--omit-system-plugin-path]
                 [opt:--plugin-path='PATH'[:__PATH__]...]
                 [opt:--params='PARAMS'] 'TYPE.PLUGIN.COMPCLS' 'OBJECT'


DESCRIPTION
-----------
The `query` command queries the object named 'OBJECT' from the component
class 'COMPCLS' of the type 'TYPE' found in the Babeltrace plugin
'PLUGIN' and prints the results.

See man:babeltrace-intro(7) to learn more about the Babeltrace
project and its core concepts.

The available values for 'TYPE' are:

`source`::
`src`::
    Source component class.

`filter`::
`flt`::
    Filter component class.

`sink`::
    Sink component class.

The exact object names and the parameters that a given component class
expects are described in its documentation. man:babeltrace-help(1) can
generally provide this information.

You can use the opt:--params='PARAMS' option to pass parameters to the
component class's query function. See <<params-fmt,Parameters format>>
for the exact format of 'PARAMS'.

The output of the `query` command looks like YAML, although it is not
guaranteed that it is YAML-compliant.

See <<examples,EXAMPLES>> for usage examples.


include::common-cmd-params-format.txt[]

include::common-cmd-plugin-path.txt[]


OPTIONS
-------
include::common-gen-options.txt[]


Query parameters
~~~~~~~~~~~~~~~~
opt:-p 'PARAMS', opt:--params='PARAMS'::
    Set the query parameters to 'PARAMS'. See <<params-fmt,Parameters
    format>> for the exact format of 'PARAMS'.


include::common-plugin-path-options.txt[]

include::common-cmd-info-options.txt[]


[[examples]]
EXAMPLES
--------
.Query the available sessions of the LTTng live source component class.
====
[role="term"]
----
$ babeltrace query src.ctf.lttng-live sessions \
                   --params='url="net://RHOST/host/TGTHOST"'
----
====

.Query the metadata info (includes the decoded text) of a CTF trace located on the local file system.
====
[role="term"]
----
$ babeltrace query src.ctf.fs metadata-info \
                   --params='path="/path/to/trace"'
----
====

.Query the trace info of CTF traces located on the local file system.
====
[role="term"]
----
$ babeltrace query src.ctf.fs trace-info \
                   --params='path="/path/to/trace"'
----
====

.Query some object from a sink component class without parameters.
====
[role="term"]
----
$ babeltrace query sink.my-plugin.my-sink some-object
----
====


include::common-cli-env.txt[]

include::common-cli-files.txt[]

include::common-cmd-footer.txt[]


SEE ALSO
--------
man:babeltrace(1),
man:babeltrace-intro(7)