HAL-GET-PROPERTY(1M) Maintenance Commands HAL-GET-PROPERTY(1M)


NAME


hal-get-property, hal-set-property - get and set HAL device properties

SYNOPSIS


hal-get-property --udi udi --key key [--help] [--verbose]
[--version]


hal-set-property --udi udi --key key {--int value | --uint64 value
| --string value | --bool value | --strlist-pre value
| --strlist-post value | --strlist-rem value | --double value
| --remove value} [--direct] [--help] [--version]


DESCRIPTION


The Hardware Abstraction Layer (HAL) provides a view of the various
hardware attached to a system. This view is updated dynamically as
hardware configuration changes by means of hotplug or other mechanisms.
HAL represents a piece of hardware as a device object. A device object is
identified by a unique identifier and carries a set of key/value pairs,
referred to as device properties. Some properties are derived from the
actual hardware, some are merged from device information files (.fdi
files), and some are related to the actual device configuration.


The hal-get-property and hal-set-property commands allow you to get and
set properties of hardware that conforms to HAL specifications.

OPTIONS


The following options are supported:

--udi udi

Unique device ID.


--key key

Key of the property to set.


--int

Set value to an integer. Accepts decimal or hexadecimal value
prefixed with 0x or x.


--uint64

Set value to an integer. Accepts decimal or hexadecimal value
prefixed with 0x or x.


--string value

Set value to a string.


--double value

Set value to a floating point number.


--boolean value

Set value to a boolean, that is, true or false


--strlist-pre value

Prepend a string to a list.


--strlist-post value

Append a string to a list.


--strlist-rem value

Remove a string from a list.


--remove value

Indicates that the property should be removed.


--direct

Use direct HAL connection


--version

Display version and exit.


--help

Display list of options and exit


ATTRIBUTES


See attributes(5) for descriptions of the following attributes:


+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | Volatile |
+--------------------+-----------------+

SEE ALSO


hald(1M), attributes(5), hal(5)


September 7, 2018 HAL-GET-PROPERTY(1M)