pub fn control_sysname(card_id: u32) -> Result<GString, Error>Expand description
Allocate sysname of control device for the sound card and return it if exists.
Nodes under sound subsystem in sysfs are used to gather the information.
§card_id
The numeridcal ID of sound card.
§Returns
true when the overall operation finishes successfully, else false.
§sysname
The string for sysname of control device for the sound card.