getallitems = function()
	local textures = {}
	for name,def in pairs(minetest.registered_nodes) do
		textures[name] = def.tiles
		print(dump(textures[name]))
	end
end

minetest.register_chatcommand("items", {
	params = "",
	description = "List all items",
	privs = {server=true},
	func = function(name, param)
		getallitems()
	end,
})