magic cookie

(1)Something passed between routines or programs that enablesthe receiver to perform some operation; a capability ticketor opaque identifier. Especially used of small data objectsthat contain data encoded in a strange or intrinsicallymachine-dependent way. E.g. on non-Unix operating systemswith a non-byte-stream model of files, the result of "ftell"may be a magic cookie rather than a byte offset; it can bepassed to "fseek", but not operated on in any meaningfulway. The phrase "it hands you a magic cookie" means itreturns a result whose contents are not defined but which canbe passed back to the same or some other program later.

magic cookie

(2)An in-band code for changing graphic rendition (e.g. inversevideo or underlining) or performing other control functions.Some older terminals would leave a blank on the screencorresponding to mode-change magic cookies; this was alsocalled a glitch (or occasionally a "turd"; compare mouse droppings).

See also cookie.

magic cookie

A small data file passed from one program to another and sent back without change. Typically used in Unix systems, a magic cookie may be an identification token or password that activates a function. The "magic" implies some obscure data known only to the software and not the user. The Web cookie term was coined after magic cookie. See cookie.

单词	magic cookie
释义	DictionarySeecookie magic cookie magic cookie (1)Something passed between routines or programs that enablesthe receiver to perform some operation; a capability ticketor opaque identifier. Especially used of small data objectsthat contain data encoded in a strange or intrinsicallymachine-dependent way. E.g. on non-Unix operating systemswith a non-byte-stream model of files, the result of "ftell"may be a magic cookie rather than a byte offset; it can bepassed to "fseek", but not operated on in any meaningfulway. The phrase "it hands you a magic cookie" means itreturns a result whose contents are not defined but which canbe passed back to the same or some other program later. magic cookie (2)An in-band code for changing graphic rendition (e.g. inversevideo or underlining) or performing other control functions.Some older terminals would leave a blank on the screencorresponding to mode-change magic cookies; this was alsocalled a glitch (or occasionally a "turd"; compare mouse droppings). See also cookie. magic cookie A small data file passed from one program to another and sent back without change. Typically used in Unix systems, a magic cookie may be an identification token or password that activates a function. The "magic" implies some obscure data known only to the software and not the user. The Web cookie term was coined after magic cookie. See cookie. MedicalSeeCookie
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