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open in:
MacOS 8.1
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Win98
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DOS
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view as text
This file was processed as: Mailbox/MIME Entity
(archive/mbox).
Confidence | Program | Detection | Match Type | Support
|
---|
100%
| dexvert
| Newsgroup Content (archive/news)
| magic
| Supported |
100%
| dexvert
| Mailbox/MIME Entity (archive/mbox)
| magic
| Supported |
1%
| dexvert
| Text File (text/txt)
| fallback
| Supported |
100%
| file
| news text
| default
| |
99%
| file
| C source, ASCII text
| default
| |
100%
| checkBytes
| Printable ASCII
| default
| |
100%
| dexmagic
| PrintFox/Pagefox WEAK
| default
| |
100%
| perlTextCheck
| Likely Text (Perl)
| default
| |
100%
| siegfried
| fmt/950 MIME Email (1.0)
| default
| |
100%
| detectItEasy
| Format: plain text[LF]
| default (weak)
| |
100%
| xdgMime
| message/news
| default
|
|
hex view+--------+-------------------------+-------------------------+--------+--------+
|00000000| 50 61 74 68 3a 20 6e 65 | 74 6c 69 6e 65 2d 66 64 |Path: ne|tline-fd|
|00000010| 64 69 2e 6a 70 6c 2e 6e | 61 73 61 2e 67 6f 76 21 |di.jpl.n|asa.gov!|
|00000020| 75 73 65 6e 65 74 0a 46 | 72 6f 6d 3a 20 6b 64 71 |usenet.F|rom: kdq|
|00000030| 40 65 6d 6f 72 79 69 2e | 6a 70 6c 2e 6e 61 73 61 |@emoryi.|jpl.nasa|
|00000040| 2e 67 6f 76 20 28 4b 65 | 76 69 6e 20 44 2e 20 51 |.gov (Ke|vin D. Q|
|00000050| 75 69 74 74 29 0a 4e 65 | 77 73 67 72 6f 75 70 73 |uitt).Ne|wsgroups|
|00000060| 3a 20 63 6f 6d 70 2e 6c | 61 6e 67 2e 63 0a 53 75 |: comp.l|ang.c.Su|
|00000070| 62 6a 65 63 74 3a 20 52 | 65 3a 20 48 6f 77 20 74 |bject: R|e: How t|
|00000080| 6f 20 75 73 65 20 61 73 | 73 65 72 74 28 20 29 0a |o use as|sert( ).|
|00000090| 44 61 74 65 3a 20 57 65 | 64 2c 20 31 37 20 41 70 |Date: We|d, 17 Ap|
|000000a0| 72 20 31 39 39 36 20 32 | 32 3a 31 32 3a 34 34 20 |r 1996 2|2:12:44 |
|000000b0| 47 4d 54 0a 4f 72 67 61 | 6e 69 7a 61 74 69 6f 6e |GMT.Orga|nization|
|000000c0| 3a 20 4a 65 74 20 50 72 | 6f 70 75 6c 73 69 6f 6e |: Jet Pr|opulsion|
|000000d0| 20 4c 61 62 6f 72 61 74 | 6f 72 79 0a 4d 65 73 73 | Laborat|ory.Mess|
|000000e0| 61 67 65 2d 49 44 3a 20 | 3c 33 31 37 35 36 39 65 |age-ID: |<317569e|
|000000f0| 32 2e 37 36 33 34 31 34 | 38 33 40 6e 65 74 6c 69 |2.763414|83@netli|
|00000100| 6e 65 2d 66 64 64 69 2e | 6a 70 6c 2e 6e 61 73 61 |ne-fddi.|jpl.nasa|
|00000110| 2e 67 6f 76 3e 0a 52 65 | 66 65 72 65 6e 63 65 73 |.gov>.Re|ferences|
|00000120| 3a 20 3c 34 6b 63 33 6b | 37 24 64 75 72 40 6f 72 |: <4kc3k|7$dur@or|
|00000130| 69 6f 6e 2e 63 79 62 65 | 72 63 6f 6d 2e 6e 65 74 |ion.cybe|rcom.net|
|00000140| 3e 20 3c 33 31 36 62 65 | 34 38 62 2e 33 33 35 34 |> <316be|48b.3354|
|00000150| 39 32 38 40 6e 65 77 73 | 2e 6e 65 74 76 69 73 69 |928@news|.netvisi|
|00000160| 6f 6e 2e 6e 65 74 2e 69 | 6c 3e 20 3c 34 6b 69 69 |on.net.i|l> <4kii|
|00000170| 72 62 24 68 6c 6c 40 73 | 70 61 72 63 73 65 72 76 |rb$hll@s|parcserv|
|00000180| 65 72 2e 6c 72 7a 2d 6d | 75 65 6e 63 68 65 6e 2e |er.lrz-m|uenchen.|
|00000190| 64 65 3e 20 3c 73 6d 72 | 79 61 6e 44 70 71 42 76 |de> <smr|yanDpqBv|
|000001a0| 37 2e 45 35 36 40 6e 65 | 74 63 6f 6d 2e 63 6f 6d |7.E56@ne|tcom.com|
|000001b0| 3e 20 3c 64 70 6d 69 6b | 65 73 65 2e 31 34 2e 30 |> <dpmik|ese.14.0|
|000001c0| 30 35 45 41 37 43 30 40 | 69 6e 67 72 2e 63 6f 6d |05EA7C0@|ingr.com|
|000001d0| 3e 20 3c 73 6d 72 79 61 | 6e 44 70 73 38 70 46 2e |> <smrya|nDps8pF.|
|000001e0| 38 37 74 40 6e 65 74 63 | 6f 6d 2e 63 6f 6d 3e 0a |87t@netc|om.com>.|
|000001f0| 52 65 70 6c 79 2d 54 6f | 3a 20 6b 64 71 40 65 6d |Reply-To|: kdq@em|
|00000200| 6f 72 79 69 2e 6a 70 6c | 2e 6e 61 73 61 2e 67 6f |oryi.jpl|.nasa.go|
|00000210| 76 0a 4e 4e 54 50 2d 50 | 6f 73 74 69 6e 67 2d 48 |v.NNTP-P|osting-H|
|00000220| 6f 73 74 3a 20 65 6d 6f | 72 79 69 2e 6a 70 6c 2e |ost: emo|ryi.jpl.|
|00000230| 6e 61 73 61 2e 67 6f 76 | 0a 4d 69 6d 65 2d 56 65 |nasa.gov|.Mime-Ve|
|00000240| 72 73 69 6f 6e 3a 20 31 | 2e 30 0a 43 6f 6e 74 65 |rsion: 1|.0.Conte|
|00000250| 6e 74 2d 54 79 70 65 3a | 20 74 65 78 74 2f 70 6c |nt-Type:| text/pl|
|00000260| 61 69 6e 3b 20 63 68 61 | 72 73 65 74 3d 55 53 2d |ain; cha|rset=US-|
|00000270| 41 53 43 49 49 0a 43 6f | 6e 74 65 6e 74 2d 54 72 |ASCII.Co|ntent-Tr|
|00000280| 61 6e 73 66 65 72 2d 45 | 6e 63 6f 64 69 6e 67 3a |ansfer-E|ncoding:|
|00000290| 20 37 62 69 74 0a 58 2d | 4e 65 77 73 72 65 61 64 | 7bit.X-|Newsread|
|000002a0| 65 72 3a 20 46 6f 72 74 | 65 20 41 67 65 6e 74 20 |er: Fort|e Agent |
|000002b0| 2e 39 39 64 2f 33 32 2e | 31 38 32 0a 0a 4f 6e 20 |.99d/32.|182..On |
|000002c0| 53 61 74 2c 20 31 33 20 | 41 70 72 20 31 39 39 36 |Sat, 13 |Apr 1996|
|000002d0| 20 30 34 3a 30 35 3a 33 | 39 20 47 4d 54 2c 20 73 | 04:05:3|9 GMT, s|
|000002e0| 6d 72 79 61 6e 40 6e 65 | 74 63 6f 6d 2e 63 6f 6d |mryan@ne|tcom.com|
|000002f0| 20 28 40 23 24 25 21 3f | 21 29 20 77 72 6f 74 65 | (@#$%!?|!) wrote|
|00000300| 3a 0a 3e 49 74 20 73 74 | 69 6c 6c 20 6c 65 61 76 |:.>It st|ill leav|
|00000310| 65 73 20 74 68 65 20 69 | 73 73 75 65 20 74 68 61 |es the i|ssue tha|
|00000320| 74 20 77 68 61 74 20 64 | 6f 20 79 6f 75 20 77 61 |t what d|o you wa|
|00000330| 6e 74 20 74 6f 20 64 6f | 20 69 66 20 74 68 65 20 |nt to do| if the |
|00000340| 70 72 6f 67 72 61 6d 20 | 66 61 69 6c 73 3a 0a 3e |program |fails:.>|
|00000350| 53 61 79 20 6d 65 61 20 | 63 75 6c 70 61 20 61 6e |Say mea |culpa an|
|00000360| 64 20 77 72 69 74 65 20 | 6f 75 74 20 65 6e 6f 75 |d write |out enou|
|00000370| 67 68 20 69 6e 66 6f 72 | 6d 61 74 69 6f 6e 20 74 |gh infor|mation t|
|00000380| 68 61 74 20 74 68 65 20 | 73 65 6c 6c 65 72 20 6d |hat the |seller m|
|00000390| 69 67 68 74 0a 3e 61 63 | 74 75 61 6c 6c 79 20 74 |ight.>ac|tually t|
|000003a0| 72 61 63 6b 20 64 6f 77 | 6e 20 74 68 65 20 70 72 |rack dow|n the pr|
|000003b0| 6f 62 6c 65 6d 2c 20 6f | 72 20 6c 65 74 20 74 68 |oblem, o|r let th|
|000003c0| 65 20 63 75 73 74 6f 6d | 65 72 20 66 75 6d 65 20 |e custom|er fume |
|000003d0| 61 6e 64 20 66 72 65 74 | 20 6f 76 65 72 0a 3e 61 |and fret| over.>a|
|000003e0| 20 6d 79 73 74 65 72 69 | 6f 75 73 6c 79 20 62 72 | mysteri|ously br|
|000003f0| 6f 6b 65 6e 20 70 72 6f | 64 75 63 74 3f 20 41 6e |oken pro|duct? An|
|00000400| 64 20 6a 75 73 74 20 68 | 6f 77 20 65 61 73 79 20 |d just h|ow easy |
|00000410| 69 73 20 69 74 20 64 75 | 70 6c 69 63 61 74 65 20 |is it du|plicate |
|00000420| 28 61 6e 64 0a 3e 69 64 | 65 6e 74 69 66 79 29 20 |(and.>id|entify) |
|00000430| 61 20 62 75 67 20 69 6e | 20 61 6e 20 69 6e 74 65 |a bug in| an inte|
|00000440| 72 61 63 74 69 76 65 20 | 70 72 6f 64 75 63 74 3f |ractive |product?|
|00000450| 0a 0a 57 69 74 68 20 73 | 75 63 68 20 61 20 70 72 |..With s|uch a pr|
|00000460| 6f 62 6c 65 6d 2c 20 49 | 20 75 73 65 64 20 74 68 |oblem, I| used th|
|00000470| 65 20 66 6f 6c 6c 6f 77 | 69 6e 67 20 74 65 63 68 |e follow|ing tech|
|00000480| 6e 69 71 75 65 73 3a 20 | 20 45 76 65 72 79 20 6b |niques: | Every k|
|00000490| 65 79 73 74 72 6f 6b 65 | 2c 0a 66 75 6e 63 74 69 |eystroke|,.functi|
|000004a0| 6f 6e 20 65 6e 74 72 79 | 20 61 6e 64 20 65 78 69 |on entry| and exi|
|000004b0| 74 20 61 6e 64 20 75 73 | 65 20 6f 66 20 6d 61 6c |t and us|e of mal|
|000004c0| 6c 6f 63 2f 66 72 65 65 | 20 77 61 73 20 72 65 63 |loc/free| was rec|
|000004d0| 6f 72 64 65 64 20 61 6e | 64 20 74 69 6d 65 2d 74 |orded an|d time-t|
|000004e0| 61 67 67 65 64 2e 0a 28 | 4b 65 79 73 74 72 6f 6b |agged..(|Keystrok|
|000004f0| 65 73 20 77 65 72 65 20 | 6b 65 70 74 20 69 6e 20 |es were |kept in |
|00000500| 61 20 72 69 6e 67 20 62 | 75 66 66 65 72 20 77 69 |a ring b|uffer wi|
|00000510| 74 68 20 65 6e 6f 75 67 | 68 20 72 6f 6f 6d 20 66 |th enoug|h room f|
|00000520| 6f 72 20 31 2f 32 20 68 | 6f 75 72 20 6f 66 0a 74 |or 1/2 h|our of.t|
|00000530| 79 70 69 63 61 6c 20 75 | 73 65 2e 29 20 20 20 41 |ypical u|se.) A|
|00000540| 6c 6c 20 76 61 72 69 61 | 62 6c 65 73 20 77 65 72 |ll varia|bles wer|
|00000550| 65 20 6b 65 70 74 20 69 | 6e 20 61 20 73 69 6e 67 |e kept i|n a sing|
|00000560| 6c 65 20 73 74 72 75 63 | 74 20 28 77 69 74 68 20 |le struc|t (with |
|00000570| 61 20 72 65 61 73 6f 6e | 61 62 6c 65 0a 63 6f 6d |a reason|able.com|
|00000580| 70 69 6c 65 72 2c 20 74 | 68 69 73 20 6d 61 6b 65 |piler, t|his make|
|00000590| 73 20 6e 6f 20 63 6f 64 | 65 20 6f 72 20 65 78 65 |s no cod|e or exe|
|000005a0| 63 75 74 69 6f 6e 20 73 | 70 65 65 64 20 64 69 66 |cution s|peed dif|
|000005b0| 66 65 72 65 6e 63 65 29 | 2e 20 20 45 61 63 68 20 |ference)|. Each |
|000005c0| 66 75 6e 63 74 69 6f 6e | 27 73 0a 76 61 72 69 61 |function|'s.varia|
|000005d0| 62 6c 65 73 20 77 65 72 | 65 20 70 6c 61 63 65 64 |bles wer|e placed|
|000005e0| 20 69 6e 20 65 69 74 68 | 65 72 20 61 20 73 74 61 | in eith|er a sta|
|000005f0| 74 69 63 20 6f 72 20 61 | 75 74 6f 6d 61 74 69 63 |tic or a|utomatic|
|00000600| 20 73 74 72 75 63 74 2c | 20 61 6e 64 20 77 65 72 | struct,| and wer|
|00000610| 65 20 6c 69 6e 6b 65 64 | 0a 74 6f 20 74 68 65 20 |e linked|.to the |
|00000620| 6d 61 69 6e 20 73 74 72 | 75 63 74 20 61 74 20 66 |main str|uct at f|
|00000630| 75 6e 63 74 69 6f 6e 20 | 65 6e 74 72 79 20 28 74 |unction |entry (t|
|00000640| 68 65 20 61 75 74 6f 6d | 61 74 69 63 73 20 77 65 |he autom|atics we|
|00000650| 72 65 20 75 6e 6c 69 6e | 6b 65 64 20 61 74 20 66 |re unlin|ked at f|
|00000660| 75 6e 63 74 69 6f 6e 0a | 65 78 69 74 29 2e 20 20 |unction.|exit). |
|00000670| 57 68 65 6e 20 73 6f 6d | 65 74 68 69 6e 67 20 62 |When som|ething b|
|00000680| 61 64 20 68 61 70 70 65 | 6e 65 64 2c 20 74 68 65 |ad happe|ned, the|
|00000690| 20 70 72 6f 67 72 61 6d | 20 77 6f 75 6c 64 20 64 | program| would d|
|000006a0| 75 6d 70 20 61 6c 6c 20 | 74 68 65 20 76 61 72 69 |ump all |the vari|
|000006b0| 61 62 6c 65 73 2c 0a 65 | 78 65 63 75 74 69 6f 6e |ables,.e|xecution|
|000006c0| 20 68 69 73 74 6f 72 79 | 2c 20 65 74 63 2e 2c 20 | history|, etc., |
|000006d0| 61 6e 64 20 74 68 65 20 | 75 73 65 72 20 77 6f 75 |and the |user wou|
|000006e0| 6c 64 20 62 65 20 61 64 | 76 69 73 65 64 20 74 68 |ld be ad|vised th|
|000006f0| 61 74 20 74 68 65 72 65 | 20 77 61 73 20 61 6e 20 |at there| was an |
|00000700| 65 72 72 6f 72 0a 61 6e | 64 20 74 6f 20 63 6f 6e |error.an|d to con|
|00000710| 74 61 63 74 20 75 73 3b | 20 61 20 70 6f 6f 72 2d |tact us;| a poor-|
|00000720| 6d 61 6e 27 73 20 63 6f | 72 65 20 64 75 6d 70 2e |man's co|re dump.|
|00000730| 20 20 28 54 68 65 73 65 | 20 75 73 65 72 73 20 77 | (These| users w|
|00000740| 65 72 65 20 62 65 74 61 | 20 74 65 73 74 65 72 73 |ere beta| testers|
|00000750| 2e 29 0a 0a 49 6e 20 6d | 6f 73 74 20 63 61 73 65 |.)..In m|ost case|
|00000760| 73 2c 20 74 68 65 20 75 | 73 65 72 20 6c 69 65 64 |s, the u|ser lied|
|00000770| 5e 57 20 77 61 73 20 77 | 72 6f 6e 67 20 61 62 6f |^W was w|rong abo|
|00000780| 75 74 20 74 68 65 20 73 | 65 71 75 65 6e 63 65 20 |ut the s|equence |
|00000790| 6f 66 20 65 76 65 6e 74 | 73 20 77 72 74 20 6b 65 |of event|s wrt ke|
|000007a0| 79 0a 73 74 72 6f 6b 65 | 73 2c 20 66 75 6e 63 74 |y.stroke|s, funct|
|000007b0| 69 6f 6e 73 20 75 73 65 | 64 2c 20 65 74 63 2e 20 |ions use|d, etc. |
|000007c0| 20 54 68 65 20 64 75 6d | 70 65 64 20 68 69 73 74 | The dum|ped hist|
|000007d0| 6f 72 79 20 61 6c 6c 6f | 77 65 64 20 75 73 20 74 |ory allo|wed us t|
|000007e0| 6f 20 66 69 78 20 6d 61 | 6e 79 0a 70 72 65 76 69 |o fix ma|ny.previ|
|000007f0| 6f 75 73 6c 79 20 6d 79 | 73 74 65 72 69 6f 75 73 |ously my|sterious|
|00000800| 20 62 75 67 73 2c 20 61 | 6e 64 20 62 75 6c 6c 65 | bugs, a|nd bulle|
|00000810| 74 2d 70 72 6f 6f 66 20 | 74 68 65 20 63 6f 64 65 |t-proof |the code|
|00000820| 20 66 72 6f 6d 20 69 6e | 63 6f 6d 70 65 74 65 6e | from in|competen|
|00000830| 74 5e 57 0a 73 6c 6f 70 | 70 79 20 75 73 65 72 73 |t^W.slop|py users|
|00000840| 2e 0a 0a 28 49 20 77 6f | 75 6c 64 20 6c 69 6b 65 |...(I wo|uld like|
|00000850| 20 74 6f 20 70 6f 69 6e | 74 20 6f 75 74 20 74 68 | to poin|t out th|
|00000860| 61 74 20 74 68 65 20 6f | 6e 6c 79 20 70 61 72 74 |at the o|nly part|
|00000870| 20 6f 66 20 74 68 69 73 | 20 73 79 73 74 65 6d 20 | of this| system |
|00000880| 74 68 61 74 20 49 20 77 | 6f 72 6b 65 64 20 6f 6e |that I w|orked on|
|00000890| 0a 77 61 73 20 74 68 65 | 20 68 69 73 74 6f 72 79 |.was the| history|
|000008a0| 20 6d 65 63 68 61 6e 69 | 73 6d 2c 20 61 6e 64 20 | mechani|sm, and |
|000008b0| 69 74 20 68 61 64 20 6e | 6f 20 70 72 6f 62 6c 65 |it had n|o proble|
|000008c0| 6d 73 2e 29 0a 0a 2d 2d | 20 0a 23 69 6e 63 6c 75 |ms.)..--| .#inclu|
|000008d0| 64 65 20 3c 73 74 61 6e | 64 61 72 64 5f 64 69 73 |de <stan|dard_dis|
|000008e0| 63 6c 61 69 6d 65 72 2e | 68 3e 20 20 20 20 20 20 |claimer.|h> |
|000008f0| 20 20 20 20 20 20 20 20 | 20 20 20 68 74 74 70 3a | | http:|
|00000900| 2f 2f 65 6d 6f 72 79 69 | 2e 6a 70 6c 2e 6e 61 73 |//emoryi|.jpl.nas|
|00000910| 61 2e 67 6f 76 2f 0a 20 | 5f 0a 4b 65 76 69 6e 20 |a.gov/. |_.Kevin |
|00000920| 44 20 51 75 69 74 74 20 | 20 55 53 41 20 39 31 33 |D Quitt | USA 913|
|00000930| 35 31 2d 34 34 35 34 20 | 20 20 20 20 20 20 20 20 |51-4454 | |
|00000940| 20 20 39 36 2e 33 37 25 | 20 6f 66 20 61 6c 6c 20 | 96.37%| of all |
|00000950| 73 74 61 74 69 73 74 69 | 63 73 20 61 72 65 20 6d |statisti|cs are m|
|00000960| 61 64 65 20 75 70 0a | |ade up. | |
+--------+-------------------------+-------------------------+--------+--------+