Part 23
1. The code you put in a system (say, a telephone switch) to make sure that the users can't do any damage. Since users always want to be able to do everything but never want to suffer for any mistakes, the construction of a firewall is a question not only of defensive coding but also of interface presentation, so that users don't even get curious about those corners of a system where they can burn themselves. 2. Any sanity check inserted to catch a can't happen error. Wise programmers often change code to fix a bug twice: once to fix the bug, and once to insert a firewall which would have arrested the bug before it did quite as much damage.
Node:firewall machine, Next:fireworks mode, Previous:firewall code, Up:= F =
firewall machine n.
A dedicated gateway machine with special security precautions on it, used to service outside network connections and dial-in lines. The idea is to protect a cluster of more loosely administered machines hidden behind it from crackers. The typical firewall is an inexpensive micro-based Unix box kept clean of critical data, with a bunch of modems and public network ports on it but just one carefully watched connection back to the rest of the cluster. The special precautions may include threat monitoring, callback, and even a complete iron box keyable to particular incoming IDs or activity patterns. Syn. flytrap, Venus flytrap.
[When first coined in the mid-1980s this term was pure jargon. Now (1999) it is techspeak, and has been retained only as an example of uptake --ESR]
Node:fireworks mode, Next:firmware, Previous:firewall machine, Up:= F =
fireworks mode n.
1. The mode a machine is sometimes said to be in when it is performing a crash and burn operation. 2. There is (or was) a more specific meaning of this term in the Amiga community. The word fireworks described the effects of a particularly serious crash which prevented the video pointer(s) from getting reset at the start of the vertical blank. This caused the DAC to scroll through the entire contents of CHIP (video or video+CPU) memory. Since each bit plane would scroll separately this was quite a spectacular effect.
Node:firmware, Next:firmy, Previous:fireworks mode, Up:= F =
firmware /ferm'weir/ n.
Embedded software contained in EPROM or flash memory. It isn't quite hardware, but at least doesn't have to be loaded from a disk like regular software. Hacker usage differs from straight techspeak in that hackers don't normally apply it to stuff that you can't possibly get at, such as the program that runs a pocket calculator. Instead, it implies that the firmware could be changed, even if doing so would mean opening a box and plugging in a new chip. A computer's BIOS is the classic example, although nowadays there is firmware in disk controllers, modems, video cards and even CD-ROM drives.
Node:firmy, Next:fish, Previous:firmware, Up:= F =
firmy /fer'mee/ n.
Syn. stiffy (a 3.5-inch floppy disk).
Node:fish, Next:FISH queue, Previous:firmy, Up:= F =
fish n.
[Adelaide University, Australia] 1. Another metasyntactic variable. See foo. Derived originally from the Monty Python skit in the middle of "The Meaning of Life" entitled "Find the Fish". 2. A pun for `microfiche'. A microfiche file cabinet may be referred to as a `fish tank'.
Node:FISH queue, Next:FITNR, Previous:fish, Up:= F =
FISH queue n.
[acronym, by analogy with FIFO (First In, First Out)] `First In, Still Here'. A joking way of pointing out that processing of a particular sequence of events or requests has stopped dead. Also `FISH mode' and `FISHnet'; the latter may be applied to any network that is running really slowly or exhibiting extreme flakiness.
Node:FITNR, Next:fix, Previous:FISH queue, Up:= F =
FITNR // adj.
[Thinking Machines, Inc.] Fixed In The Next Release. A written-only notation attached to bug reports. Often wishful thinking.
Node:fix, Next:FIXME, Previous:FITNR, Up:= F =
fix n.,v.
What one does when a problem has been reported too many times to be ignored.
Node:FIXME, Next:flag, Previous:fix, Up:= F =
FIXME imp.
[common] A standard tag often put in C comments near a piece of code that needs work. The point of doing so is that a grep or a similar pattern-matching tool can find all such places quickly.
/* FIXME: note this is common in GNU code. */
Compare XXX.
Node:flag, Next:flag day, Previous:FIXME, Up:= F =
flag n.
[very common] A variable or quantity that can take on one of two values; a bit, particularly one that is used to indicate one of two outcomes or is used to control which of two things is to be done. "This flag controls whether to clear the screen before printing the message." "The program status word contains several flag bits." Used of humans analogously to bit. See also hidden flag, mode bit.
Node:flag day, Next:flaky, Previous:flag, Up:= F =
flag day n.
A software change that is neither forward- nor backward-compatible, and which is costly to make and costly to reverse. "Can we install that without causing a flag day for all users?" This term has nothing to do with the use of the word flag to mean a variable that has two values. It came into use when a massive change was made to the Multics timesharing system to convert from the short-lived 1965 version of the ASCII code to the 1967 version (in draft at the time); this was scheduled for Flag Day (a U.S. holiday), June 14, 1966. The actual change moved the code point for the ASCII newline character; this required that all of the Multics source code, documentation, and device drivers be changed simultaneously. See also backward combatability.
Node:flaky, Next:flamage, Previous:flag day, Up:= F =
flaky adj.
(var sp. `flakey') Subject to frequent lossage. This use is of course related to the common slang use of the word to describe a person as eccentric, crazy, or just unreliable. A system that is flaky is working, sort of -- enough that you are tempted to try to use it -- but fails frequently enough that the odds in favor of finishing what you start are low. Commonwealth hackish prefers dodgy or wonky.
Node:flamage, Next:flame, Previous:flaky, Up:= F =
flamage /flay'm*j/ n.
[very common] Flaming verbiage, esp. high-noise, low-signal postings to Usenet or other electronic fora. Often in the phrase `the usual flamage'. `Flaming' is the act itself; `flamage' the content; a `flame' is a single flaming message. See flame, also dahmum.
Node:flame, Next:flame bait, Previous:flamage, Up:= F =
flame
[at MIT, orig. from the phrase `flaming asshole'] 1. vi. To post an email message intended to insult and provoke. 2. vi. To speak incessantly and/or rabidly on some relatively uninteresting subject or with a patently ridiculous attitude. 3. vt. Either of senses 1 or 2, directed with hostility at a particular person or people. 4. n. An instance of flaming. When a discussion degenerates into useless controversy, one might tell the
## participants "Now you're just flaming" or "Stop all that
flamage!" to try to get them to cool down (so to speak).
The term may have been independently invented at several different places. It has been reported from MIT, Carleton College and RPI (among many other places) from as far back as 1969, and from the University of Virginia in the early 1960s.
It is possible that the hackish sense of `flame' is much older than that. The poet Chaucer was also what passed for a wizard hacker in his time; he wrote a treatise on the astrolabe, the most advanced computing device of the day. In Chaucer's "Troilus and Cressida", Cressida laments her inability to grasp the proof of a particular mathematical theorem; her uncle Pandarus then observes that it's called "the fleminge of wrecches." This phrase seems to have been intended in context as "that which puts the wretches to flight" but was probably just as ambiguous in Middle English as "the flaming of wretches" would be today. One suspects that Chaucer would feel right at home on Usenet.
Node:flame bait, Next:flame on, Previous:flame, Up:= F =
flame bait n.
[common] A posting intended to trigger a flame war, or one that invites flames in reply. See also troll.
Node:flame on, Next:flame war, Previous:flame bait, Up:= F =
flame on vi.,interj.
1. To begin to flame. The punning reference to Marvel Comics's Human Torch is no longer widely recognized. 2. To continue to flame. See rave, burble.
Node:flame war, Next:flamer, Previous:flame on, Up:= F =
flame war n.
[common] (var. `flamewar') An acrimonious dispute, especially when conducted on a public electronic forum such as Usenet.
Node:flamer, Next:flap, Previous:flame war, Up:= F =
flamer n.
[common] One who habitually flames. Said esp. of obnoxious Usenet personalities.
Node:flap, Next:flarp, Previous:flamer, Up:= F =
flap vt.
1. [obs.] To unload a DECtape (so it goes flap, flap, flap...). Old-time hackers at MIT tell of the days when the disk was device 0 and DEC microtapes were 1, 2,... and attempting to flap device 0 would instead start a motor banging inside a cabinet near the disk. 2. By extension, to unload any magnetic tape. See also macrotape. Modern cartridge tapes no longer actually flap, but the usage has remained. (The term could well be re-applied to DEC's TK50 cartridge tape drive, a spectacularly misengineered contraption which makes a loud flapping sound, almost like an old reel-type lawnmower, in one of its many tape-eating failure modes.)
Node:flarp, Next:flash crowd, Previous:flap, Up:= F =
flarp /flarp/ n.
[Rutgers University] Yet another metasyntactic variable (see foo). Among those who use it, it is associated with a legend that any program not containing the word `flarp' somewhere will not work. The legend is discreetly silent on the reliability of programs which do contain the magic word.
Node:flash crowd, Next:flat, Previous:flarp, Up:= F =
flash crowd
Larry Niven's 1973 SF short story "Flash Crowd" predicted that one consequence of cheap teleportation would be huge crowds materializing almost instantly at the sites of interesting news stories. Twenty years later the term passed into common use on the Internet to describe exponential spikes in website or server usage when one passes a certain threshold of popular interest (this may also be called slashdot effect).
Node:flat, Next:flat-ASCII, Previous:flash crowd, Up:= F =
flat adj.
1. [common] Lacking any complex internal structure. "That bitty box has only a flat filesystem, not a hierarchical one." The verb form is flatten. 2. Said of a memory architecture (like that of the VAX or 680x0) that is one big linear address space (typically with each possible value of a processor register corresponding to a unique core address), as opposed to a `segmented' architecture (like that of the 80x86) in which addresses are composed from a base-register/offset pair (segmented designs are generally considered cretinous).
Note that sense 1 (at least with respect to filesystems) is usually used pejoratively, while sense 2 is a Good Thing.
Node:flat-ASCII, Next:flat-file, Previous:flat, Up:= F =
flat-ASCII adj.
[common] Said of a text file that contains only 7-bit ASCII characters and uses only ASCII-standard control characters (that is, has no embedded codes specific to a particular text formatter markup language, or output device, and no meta-characters). Syn. plain-ASCII. Compare flat-file.
Node:flat-file, Next:flatten, Previous:flat-ASCII, Up:= F =
flat-file adj.
A flattened representation of some database or tree or network structure as a single file from which the structure could implicitly be rebuilt, esp. one in flat-ASCII form. See also sharchive.
Node:flatten, Next:flavor, Previous:flat-file, Up:= F =
flatten vt.
[common] To remove structural information, esp. to filter something with an implicit tree structure into a simple sequence of leaves; also tends to imply mapping to flat-ASCII. "This code flattens an expression with parentheses into an equivalent canonical form."
Node:flavor, Next:flavorful, Previous:flatten, Up:= F =
flavor n.
1. [common] Variety, type, kind. "DDT commands come in two flavors." "These lights come in two flavors, big red ones and small green ones." "Linux is a flavor of Unix" See vanilla. 2. The attribute that causes something to be flavorful. Usually used in the phrase "yields additional flavor". "This convention yields additional flavor by allowing one to print text either right-side-up or upside-down." See vanilla. This usage was certainly reinforced by the terminology of quantum chromodynamics, in which quarks (the constituents of, e.g., protons) come in six flavors (up, down, strange, charm, top, bottom) and three colors (red, blue, green) -- however, hackish use of `flavor' at MIT predated QCD. 3. The term for `class' (in the object-oriented sense) in the LISP Machine Flavors system. Though the Flavors design has been superseded (notably by the Common LISP CLOS facility), the term `flavor' is still used as a general synonym for `class' by some LISP hackers.
Node:flavorful, Next:flippy, Previous:flavor, Up:= F =
flavorful adj.
Full of flavor (sense 2); esthetically pleasing. See random and losing for antonyms. See also the entries for taste and elegant.
Node:flippy, Next:flood, Previous:flavorful, Up:= F =
flippy /flip'ee/ n.
A single-sided floppy disk altered for double-sided use by addition of a second write-notch, so called because it must be flipped over for the second side to be accessible. No longer common.
Node:flood, Next:flowchart, Previous:flippy, Up:= F =
flood v.
[common] 1. To overwhelm a network channel with mechanically-generated traffic; especially used of IP, TCP/IP, UDP, or ICMP denial-of-service attacks. 2. To dump large amounts of text onto an IRC channel. This is especially rude when the text is uninteresting and the other users are trying to carry on a serious conversation. Also used in a similar sense on Usenet. 3. [Usenet] To post an unusually large number or volume of files on a related topic.
Node:flowchart, Next:flower key, Previous:flood, Up:= F =
flowchart n.
[techspeak] An archaic form of visual control-flow specification employing arrows and `speech balloons' of various shapes. Hackers never use flowcharts, consider them extremely silly, and associate them with COBOL programmers, card wallopers, and other lower forms of life. This attitude follows from the observations that flowcharts (at least from a hacker's point of view) are no easier to read than code, are less precise, and tend to fall out of sync with the code (so that they either obfuscate it rather than explaining it, or require extra maintenance effort that doesn't improve the code). See also PDL, sense 1.
Node:flower key, Next:flush, Previous:flowchart, Up:= F =
flower key n.
[Mac users] See feature key.
Node:flush, Next:flypage, Previous:flower key, Up:= F =
flush v.
1. [common] To delete something, usually superfluous, or to abort an operation. "All that nonsense has been flushed." 2. [Unix/C] To force buffered I/O to disk, as with an fflush(3) call. This is not an abort or deletion as in sense 1, but a demand for early completion! 3. To leave at the end of a day's work (as opposed to leaving for a meal). "I'm going to flush now." "Time to flush." 4. To exclude someone from an activity, or to ignore a person.
`Flush' was standard ITS terminology for aborting an output operation; one spoke of the text that would have been printed, but was not, as having been flushed. It is speculated that this term arose from a vivid image of flushing unwanted characters by hosing down the internal output buffer, washing the characters away before they could be printed. The Unix/C usage, on the other hand, was propagated by the fflush(3) call in C's standard I/O library (though it is reported to have been in use among BLISS programmers at DEC and on Honeywell and IBM machines as far back as 1965). Unix/C hackers found the ITS usage confusing, and vice versa.
Node:flypage, Next:Flyspeck 3, Previous:flush, Up:= F =
flypage /fli:'payj/ n.
(alt. `fly page') A banner, sense 1.
Node:Flyspeck 3, Next:flytrap, Previous:flypage, Up:= F =
Flyspeck 3 n.
Standard name for any font that is so tiny as to be unreadable (by analogy with names like `Helvetica 10' for 10-point Helvetica). Legal boilerplate is usually printed in Flyspeck 3.
Node:flytrap, Next:FM, Previous:Flyspeck 3, Up:= F =
flytrap n.
[rare] See firewall machine.
Node:FM, Next:fnord, Previous:flytrap, Up:= F =
FM /F-M/ n.
1. [common] Not `Frequency Modulation' but rather an abbreviation for `Fucking Manual', the back-formation from RTFM. Used to refer to the manual itself in the RTFM. "Have you seen the Networking FM lately?" 2. Abbreviation for "Fucking Magic", used in the sense of black magic.
Node:fnord, Next:FOAF, Previous:FM, Up:= F =
fnord n.
[from the "Illuminatus Trilogy"] 1. A word used in email and news postings to tag utterances as surrealist mind-play or humor, esp. in connection with Discordianism and elaborate conspiracy theories. "I heard that David Koresh is sharing an apartment in Argentina with Hitler. (Fnord.)" "Where can I fnord get the Principia Discordia from?" 2. A metasyntactic variable, commonly used by hackers with ties to Discordianism or the Church of the SubGenius.
Node:FOAF, Next:FOD, Previous:fnord, Up:= F =
FOAF // n.
[Usenet; common] Acronym for `Friend Of A Friend'. The source of an unverified, possibly untrue story. This term was not originated by hackers (it is used in Jan Brunvand's books on urban folklore), but is much better recognized on Usenet and elsewhere than in mainstream English.
Node:FOD, Next:fold case, Previous:FOAF, Up:= F =
FOD /fod/ v.
[Abbreviation for `Finger of Death', originally a spell-name from fantasy gaming] To terminate with extreme prejudice and with no regard for other people. From MUDs where the wizard command `FOD <player>' results in the immediate and total death of <player>, usually as punishment for obnoxious behavior. This usage migrated to other circumstances, such as "I'm going to fod the process that is burning all the cycles." Compare gun.
In aviation, FOD means Foreign Object Damage, e.g., what happens when a jet engine sucks up a rock on the runway or a bird in flight. Finger of Death is a distressingly apt description of what this generally does to the engine.
Node:fold case, Next:followup, Previous:FOD, Up:= F =
fold case v.
See smash case. This term tends to be used more by people who don't mind that their tools smash case. It also connotes that case is ignored but case distinctions in data processed by the tool in question aren't destroyed.
Node:followup, Next:fontology, Previous:fold case, Up:= F =
followup n.
[common] On Usenet, a posting generated in response to another posting (as opposed to a reply, which goes by email rather than being broadcast). Followups include the ID of the parent message in their headers; smart news-readers can use this information to present Usenet news in `conversation' sequence rather than order-of-arrival. See thread.
Node:fontology, Next:foo, Previous:followup, Up:= F =
fontology n.
[XEROX PARC] The body of knowledge dealing with the construction and use of new fonts (e.g., for window systems and typesetting software). It has been said that fontology recapitulates file-ogeny.
[Unfortunately, this reference to the embryological dictum that "Ontogeny recapitulates phylogeny" is not merely a joke. On the Macintosh, for example, System 7 has to go through contortions to compensate for an earlier design error that created a whole different set of abstractions for fonts parallel to `files' and `folders' --ESR]
Node:foo, Next:foobar, Previous:fontology, Up:= F =
foo /foo/
1. interj. Term of disgust. 2. [very common] Used very generally as a sample name for absolutely anything, esp. programs and files (esp. scratch files). 3. First on the standard list of metasyntactic variables used in syntax examples. See also bar, baz, qux, quux, corge, grault, garply, waldo, fred, plugh, xyzzy, thud.
When `foo' is used in connection with `bar' it has generally traced to the WWII-era Army slang acronym FUBAR (`Fucked Up Beyond All Repair'), later modified to foobar. Early versions of the Jargon File interpreted this change as a post-war bowdlerization, but it it now seems more likely that FUBAR was itself a derivative of `foo' perhaps influenced by German `furchtbar' (terrible) - `foobar' may actually have been the original form.
For, it seems, the word `foo' itself had an immediate prewar history in comic strips and cartoons. The earliest documented uses were in the "Smokey Stover" comic strip popular in the 1930s, which frequently included the word "foo". Bill Holman, the author of the strip, filled it with odd jokes and personal contrivances, including other nonsense phrases such as "Notary Sojac" and "1506 nix nix". According to the Warner Brothers Cartoon Companion Holman claimed to have found the word "foo" on the bottom of a Chinese figurine. This is plausible; Chinese statuettes often have apotropaic inscriptions, and this may have been the Chinese word `fu' (sometimes transliterated `foo'), which can mean "happiness" when spoken with the proper tone (the lion-dog guardians flanking the steps of many Chinese restaurants are properly called "fu dogs"). English speakers' reception of Holman's `foo' nonsense word was undoubtedly influenced by Yiddish `feh' and English `fooey' and `fool'.
Holman's strip featured a firetruck called the Foomobile that rode on two wheels. The comic strip was tremendously popular in the late 1930s, and legend has it that a manufacturer in Indiana even produced an operable version of Holman's Foomobile. According to the Encyclopedia of American Comics, `Foo' fever swept the U.S., finding its way into popular songs and generating over 500 `Foo Clubs.' The fad left `foo' references embedded in popular culture (including a couple of appearances in Warner Brothers cartoons of 1938-39) but with their origins rapidly forgotten.
One place they are known to have remained live is in the U.S. military during the WWII years. In 1944-45, the term `foo fighters' was in use by radar operators for the kind of mysterious or spurious trace that would later be called a UFO (the older term resurfaced in popular American usage in 1995 via the name of one of the better grunge-rock bands). Informants connected the term to the Smokey Stover strip.
The U.S. and British militaries frequently swapped slang terms during the war (see kluge and kludge for another important example) Period sources reported that `FOO' became a semi-legendary subject of WWII British-army graffiti more or less equivalent to the American Kilroy. Where British troops went, the graffito "FOO was here" or something similar showed up. Several slang dictionaries aver that FOO probably came from Forward Observation Officer, but this (like the contemporaneous "FUBAR") was probably a backronym . Forty years later, Paul Dickson's excellent book "Words" (Dell, 1982, ISBN 0-440-52260-7) traced "Foo" to an unspecified British naval magazine in 1946, quoting as follows: "Mr. Foo is a mysterious Second World War product, gifted with bitter omniscience and sarcasm."
Earlier versions of this entry suggested the possibility that hacker usage actually sprang from "FOO, Lampoons and Parody", the title of a comic book first issued in September 1958, a joint project of Charles and Robert Crumb. Though Robert Crumb (then in his mid-teens) later became one of the most important and influential artists in underground comics, this venture was hardly a success; indeed, the brothers later burned most of the existing copies in disgust. The title FOO was featured in large letters on the front cover. However, very few copies of this comic actually circulated, and students of Crumb's `oeuvre' have established that this title was a reference to the earlier Smokey Stover comics. The Crumbs may also have been influenced by a short-lived Canadian parody magazine named `Foo' published in 1951-52.
An old-time member reports that in the 1959 "Dictionary of the TMRC Language", compiled at TMRC, there was an entry that went something like this:
FOO: The first syllable of the sacred chant phrase "FOO MANE PADME HUM." Our first obligation is to keep the foo counters turning.