PPS object types

Device publishers write device information to multiple PPS objects in fixed locations. Applications can monitor these objects to learn of device updates and to retrieve information that enables access to device contents.

Publishers output the following types of PPS objects for each device:

Type	Description	Location
Device information object	Contains physical and logical connectivity information specific to the device's hardware type. This information might include: device's vendor ID mediastore type product serial number details on temperature and drive mechanism state slot information	/pps/qnx/device/
Device control object	Accepts commands for performing device actions, such as toggling the power on a USB hub port or ejecting a disc. Can also contain command outcomes, depending on the publisher. Note: The device control objects are PPS server objects. For information on using server objects, see the Persistent Publish/Subscribe Developer's Guide.	/pps/qnx/device/`type`_ctrl, where `type` is either `usb` or `cd0`
Driver object	Contains driver information, such as the process name and ID (pid), and a reference to the device information object associated with the driver	/pps/qnx/driver/
Mount object	Contains information on the device's filesystem, including: mountpoint filesystem type partition label other hardware-specific fields	/pps/qnx/mount/