ALSACtlget_control_devnode

gboolean
alsactl_get_control_devnode (
  guint card_id,
  char** devnode,
  GError** error
)

Allocate string of devnode for control device of the sound card and return it if exists.

Nodes under sound subsystem in sysfs are used to gather the information.

`card_id`	`guint`
	The numeric ID of sound card.
`devnode`	`char**`
	The string for devnode 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`.