Applications can perform actions on a CD by writing commands to the cdpub device control object. The cdpub process creates this PPS server object. By default, the object's path is /pps/qnx/device/cd0_ctrl but you can change this path through cdpub command options. When cdpub receives updates (i.e., data from the object), it executes the specified commands.
name::parameter
| Command | Description | Parameter type and purpose |
|---|---|---|
| eject | Eject the device | Integer indicating the slot numbera |
| enable | Request that the drive enable or disable media access operations | Integer set to one of the following values: 0 (to stop the disc), 1 (to start the disc and read the TOC), 2 (to stop the disc and eject it if possible), or 3 (to load the disc) |
| load | Load the device | Integer indicating the slot numbera |
| power_condition | Request that the drive be put into a specific power state | Integer between the values of 0 and 5. The power states supported are vendor-specific. |
| prevent_media_removal | Adjust setting for preventing disc from being ejected | Integer set to one of the following values: 0 to allow disc removal or 1 to prevent it |
| reload | Reload the device | Integer indicating the slot numbera |
| temperature_simulation | Enable or disable simulation of temperature value and state | Integer set to one of the following values: 0 to enable simulation or 1 to disable it |
| temperature_state | Set temperature state (in simulation) | Integer set to one of the following values: 0 for unknown, 1 for normal, 2 for overtemp, 3 for unsupported, or 4 for undertemp |
| temperature_value | Set temperature value (in simulation) | Integer whose range is device-specific |
| unload | Unload the device | Integer indicating the slot numbera |