Landon Curt Noll
d2a42f42e8
We we move 1988-2004 entries from all of a year's winning entries in a single directory to each winner being in their own sub-directory under the given year directory.
91 lines
4.1 KiB
Plaintext
91 lines
4.1 KiB
Plaintext
Best Utility:
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Byron Rakitzis Sean Dorward
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Princeton University Princeton University
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5707 Old Lodge Dr. 10274 Burleigh Cottage Lane
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Houston, TX 77066 Ellicott City, MD 21043
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USA USA
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Judges' comments:
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This program implements a subject a well known Un*x utility whose
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original source was considered to be extremely obfuscated by many
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people, excluding its author. In fact, this utility one a major
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inspiration for the formation of this contest.
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The author supplied us with a slightly smaller unformatted version
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of the program which we include below:
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#define D ,close(
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char*c,q[512],m[256],*v[99],**u,*i[3];int f[2],p;main(){for(m[m[60]=m[62]=
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32]=m[*m=124[m]=9]=6;e(-8),gets(1+(c=q))||exit(0);r(0,0))for(;*++c;);}
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r(t,o){*i=i[2]=0;for(u=v+98;m[*--c]^9;m[*c]&32?i[*c&2]=
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*u,u-v^98&&++u:3)if(!m[*c]){for(*++c=0;!m[*--c];);*--u=
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++c;}u-v^98?strcmp(*u,"cd")?*c?pipe(f),o=f[1]:1,(p=fork())?e(p),o?
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r(o,0)D o)D*f):4,wait(0):(o?dup2(*f,0)D*f)D o):*i?1 D
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0),e(open(*i,0)):5,t?dup2(t,1)D t):i[2]?9 D
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1),e(creat(i[2],438)):2,e(execvp(*u,u))):e(chdir(u[1])*2):6;}
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e(x){x<0?write(2,"?\n$ "-x/4,2),x+1||exit(1):5;}
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Selected notes from the author: (rot13 to read)
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Guvf cebtenz vf n ehqvzragnel furyy. Vg qbrf v/b erqverpgvba, cvcrf
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naq pq. Vg syntf reebef ba snvyrq puqve'f, bcra'f, perng'f
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rkrpic'f, sbex'f naq n srj flagnk reebef.
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Guvf cebtenz vf boshfpngrq va n srj abgnoyr jnlf: ncneg sebz gur
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ynlbhg (na hasbeznggrq (ohg pehapurq) irefvba vf vapyhqrq sbe
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crbcyr jub jnag gb chg guvf guebhtu po) vg znxrf pyrire hfr bs n
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jevgr fgngrzrag, fb gung gur fnzr fgngrzrag pna or hfrq gb cevag
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reebef naq gur cebzcg. Ol pnyyvat gur reebe shapgvba jvgu gur inyhr
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-8, gur cbvagre bssfrg va gur rkcerffvba "?\a$ "-k/4 tbrf sebz 0 gb
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2. Cerfgb! N cebzcg. Sbe reebef jvgu ahzoref fznyyre guna -4
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(v.r., HAVK flfgrz pnyyf) n dhrfgvba znex vf cevagrq.
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Gur reebe inyhr bs puqve vf qbhoyrq fb gung jr qba'g rkvg sebz gur
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cnerag furyy ba n puqve reebe (fvapr r() rkvgf ba -1 reebef bayl).
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Nyy bgure flfgrz pnyy snvyherf rkvg fvapr gurl ner sebz fhofuryyf.
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Erphefvba vf farnxvyl rzcyblrq gb nibvq n frpbaq pnyy gb sbex(),
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naq gur yvar vf cnefrq va n snveyl ovmneer snfuvba: onpxjneqf. Gur
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urneg bs gur cebtenz, gung vf, gur cneg juvpu cresbezf nyy sbexf,
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rkrpf, bcraf, rgp. vf BAR P FGNGRZRAG.
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Gur zrgn-inyhrf neenl vf vavgvnyvmrq va n ovmneer snfuvba, naq gur
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fhofrdhrag purpxf sbe gur '<' naq '>' ner cresbezrq va n fvatyr
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fgngrzrag hfvat n znfx, fvapr lbh xabj gung '>'&2 vf 0, jurernf
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'<'&2 vf 2. Bgure fhpu zvpeb-boshfpngvbaf nobhaq.
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Svanyyl, vg vf abgnoyr gung gur pbqr jnf unpxrq sbe zvavznyvgl. Vs
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lbh ybbx ng gur pbzcerffrq irefvba, lbh jvyy or uneq-cerffrq gb
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ryvzvangr zber guna n srj punenpgref (jr pna'g frr ubj gb znxr vg
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nal fznyyre!). 550 punenpgref vf cerggl yrna sbe n furyy gung qbrf
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guvf zhpu.
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OHTF
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Gur flagnk bs gur furyy unf abg orra shyyl rkcyberq, ohg vs lbh gel
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gb erqverpg va gur fnzr qverpgvba zber guna bapr, bayl bar
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erqverpgvba vf cresbezrq. Guvf vf n "srngher" bs gur jnl gur yvar
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vf cnefrq; n cbvagre gb gur fgnpx bs nethzragf vf nffvtarq naq na
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nethzrag vf fgbyra rirel gvzr n ">" be "<" vf rapbhagrerq. Gur
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furyy syntf na reebe vs ab nethzragf ner ba gur fgnpx. Guhf, sbe
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rknzcyr:
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png > sbb > one
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pngf gb sbb, fvapr vg jnf chfurq ynfg, ohg
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png > > sbb one
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pngf gb one, fvapr one jnf chfurq haqre sbb. (erzrzore jr'er
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cnefvat evtug-yrsg)
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Qrcraqvat ba lbhe synibe bs HA*K, pq jvgubhg na nethzrag jvyy
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rvgure cebqhpr na reebe be whfg qb abguvat.
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Gurer vf whfg bar reebe zrffntr, gur dhrfgvba znex, ohg url, gung'f
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nyy rq qbrf gbb.
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Copyright (c) 1990, Landon Curt Noll & Larry Bassel.
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All Rights Reserved. Permission for personal, educational or non-profit use is
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granted provided this this copyright and notice are included in its entirety
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and remains unaltered. All other uses must receive prior permission in writing
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from both Landon Curt Noll and Larry Bassel.
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