vgroup_id	IN:	Vgroup identifier returned by Vattach
	vgroup_name	OUT:	Name of the vgroup

	Purpose	Retrieves the name of a vgroup.
	Return value	Returns SUCCEED (or 0) if successful and FAIL (or -1) otherwise.
	Description	Vgetname retrieves the name of the vgroup identified by the parameter vgroup_id into the buffer vgroup_name. The maximum length of the name is defined by VGNAMELENMAX (or 64).

	FORTRAN	integer function vfgnam(vgroup_id, vgroup_name)
		integer vgroup_id
		character*(*) vgroup_name