ALSACtlget_control_sysname

gboolean
alsactl_get_control_sysname (
  guint card_id,
  char** sysname,
  GError** error
)

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`	`guint`
	The numeridcal ID of sound card.
`sysname`	`char**`
	The string for sysname of control device for the sound card.
	The argument will be set by the function.
	The called function takes ownership of the data, and is responsible for freeing it.
	The value is a NUL terminated UTF-8 string.
`error`	`GError **`
	The return location for a `GError*`, or `NULL`.

Returns:	`gboolean`
	`TRUE` when the overall operation finishes successfully, else `FALSE`.