|1.||magic cookie - Something passed between routines or programs that enables the receiver to perform some operation; a capability ticket or opaque identifier. Especially used of small data objects that contain data encoded in a strange or intrinsically machine-dependent way. E.g. on non-Unix operating systems with a non-byte-stream model of files, the result of "ftell" may be a magic cookie rather than a byte offset; it can be passed to "fseek", but not operated on in any meaningful way. The phrase "it hands you a magic cookie" means it returns a result whose contents are not defined but which can be passed back to the same or some other program later.|
|2.||magic cookie - An in-band code for changing graphic rendition (e.g. inverse
video or underlining) or performing other control functions.
Some older terminals would leave a blank on the screen
corresponding to mode-change magic cookies; this was also
called a glitch (or occasionally a "turd"; compare mouse droppings).|
See also cookie.