ÿØÿà JFIF 

  
 
  ÿÛ „ 	 ( %"1!%)+...383,7(-.+




-+++--++++---+-+-----+---------------+---+-++7-----ÿÀ  ß â
" 

ÿÄ   

           
 ÿÄ H 
     
 !1AQaq"‘¡2B±ÁÑð#R“Ò Tbr‚²á3csƒ’ÂñDS¢³$CÿÄ 
 


            
ÿÄ %

 
       
!1AQa"23‘ÿÚ 
  ? ôÿ ¨pŸªáÿ —åYõõ\?àÒü©ŠÄï¨pŸªáÿ —åYõõ\?àÓü©ŠÄá 0Ÿªáÿ Ÿå[úƒ	ú®ði~TÁb
qÐ8OÕpÿ ƒOò¤Oè`–RÂáœá™êi€ßÉ< FtŸI“öÌ8úDf´°å}“¾œ6
öFá°y¥jñÇh†ˆ¢ã/ÃÐ:ªcÈ
"Y¡ðÑl>ÿ ”ÏËte:qž\oäŠe÷󲍷˜HT4&ÿ ÓÐü6ö®¿øþßèô	Ÿ•7Ñi’•j|“ñì>b…þS?*Óôÿ ÓÐü*h¥£ír¶ü UãSç‚Ÿ[AÐaè[ûª•õ&õj?†Éö+EzP—WeÒírJFt	‘BŒ†Ï‡%#tE Øz ¥OÛ«!1›üä±Í™%º<!vB™'èÔ6´Ña¿«e`Àà0U[-ÂБ4)M÷YK*³hï÷%ÎÎkÇ«m‘-íWŽLsã?nÂ~«†üö®þ¡ÂlÃaÿ ‰ÿ l©°Õ¥ åÜá¿r ºL[Çâ°(Çè'Vãôl8´ÏRÀvLvPõ:…ÙNçF™÷ë>Íãö]°î(–:@<‹ŒÊö×òÆt¦ãº+‡¦%ÌÁ²h´OƒJŒtMÜ>ÀÜÊw3
Y´•牋4ǍýʏTì>œú=Íwhyë,¾Ôò×õ¿ßÊa»«þˆѪQ|%6ž™A	õ%:øj<>É—ÿ Å_ˆCbõ¥š±ý¯Ýƒï…¶|RëócÍf溪“t.СøTÿ *Ä¿-{†çàczůŽ_–^XþŒ±miB[X±d 1,é”zEù»&
î9gœf™9Ð'.;—™i}!ôšåîqêÛ٤ёý£½ÆA–àôe"A$˝Úsäÿ 
÷Û	#°xŸëí(l
	 »ý3—¥5m!
rt`†0~'j2(]S¦¦kv,ÚÇl¦øJA£Šƒ
J3E8ÙiŽ:cÉžúeZ°€¯\®kÖ(79«Ž:¯X”¾³Š&¡* ….‰Ž(ÜíŸ2¥ª‡×Hi²TF¤ò[¨íÈRëÉ䢍mgÑ.Ÿ<öäS0í„ǹÁU´f#Vß;Õ–…P@3ío<ä-±»Ž.L|kªÀê›fÂ6@»eu‚|ÓaÞÆŸ…¨ááå>åŠ?cKü6ùTÍÆ”†sĤÚ;H2RÚ†õ\Ö·Ÿn'¾ ñ#ºI¤Å´%çÁ­‚â7›‹qT3Iï¨Ö
Ú5I7Ë!ÅOóŸ¶øÝñØôת¦$Tcö‘[«Ö³šÒ';Aþ ¸èíg
A2Z
"i¸vdÄ÷.iõ®§)¿]¤À†–‡É&ä{V¶iŽ”.Ó×Õÿ û?h¬Mt–íª[ÿ Ñÿ ÌV(í}=ibÔ¡›¥¢±b
 Lô¥‡piη_Z<‡z§èŒ)iÖwiÇ 2hÙ3·=’d÷8éŽ1¦¸c¤µ€7›7Ø	ð\á)}	¹fËí›pAÃL%âc2 í§æQz¿;T8sæ°qø)QFMð‰XŒÂ±
N¢aF¨…8¯!U		Z©RÊ ÖPVÄÀÍin™Ì-GˆªÅËŠ›•zË}º±ŽÍFò¹}Uw×#ä5B¤{î}Ð<ÙD
é©¤&‡ïDbàÁôMÁ."
¤‡ú*õ'VŽ|¼´Úgllº¼klz[Æüï÷Aób‡Eÿ dÑ»Xx9ÃÜ£ÁT/`¼¸vI±Ýµ·Ë‚“G³þ*Ÿû´r|*}<¨îºœ @¦mÄ’M¹”.œ«Y–|6ÏU¤jç¥ÕÞqO
˜kDÆÁ¨5ÿ š;Њ¦¦€GÙk \
	–Þ=â¼=SͧµªS°ÚÍpÜãQűÀõ¬?ÃÁ1Ñ•õZà?hóœ€
L¦l{Y*K˜Ù›zc˜–ˆâø+¾	­-Ök¥%ùEÜA'}ˆ><ÊIè“bpÍ/qÞâvoX€w,\úªò6Z[XdÒæ­@Ö—€$òJí#é>'°Ú
ôª˜<)4ryÙ£|óAÅn5žêŸyÒäMÝ2{"}‰–¤l÷ûWX\l¾Á¸góÉOÔ /óñB¤f¸çñ[.P˜ZsÊË*ßT܈§QN¢’¡¨§V¼(Üù*eÕ“”5T¨‹Âê¥FŒã½Dü[8'Ò¥a…Ú¶k7a
*•›¼'Ò·\8¨ª\@\õ¢¦íq+DÙrmÎ…_ªæ»ŠÓœ¡¯’Ré9MÅ×D™lælffc+ŒÑ,ý™ÿ ¯þǤ=Å’Á7µ÷ÚÛ/“Ü
€ñýã¼àí¾ÕÑ+ƒ,uµMâÀÄbm:ÒÎPæ{˜Gz[ƒ¯«® KHà`ßØŠéí¯P8Aq.C‰ à€kòpj´kN¶qô€…Õ,ÜNŠª-­{Zö’æû44‰sŽè‰îVíRœÕm"
6?³D9¡ÇTíÅꋇ`4«¸ÝÁô ï’ýorqКÇZ«x4Žâéþuïf¹µö[P ,Q£éaX±`PÉÍZ ¸äYúgüAx
’6Lê‚xÝÓ*äQ
Ï’¨hÍ
=²,6ï#rÃ<¯–£»ƒ‹,–ê•€ aÛsñ'%Æ"®ÛüìBᝠHÚ3ß°©$“XnœÖ’î2ËTeûìxîß
¦å¿çÉ
ðK§þ{‘t‚Ϋ¬jéîZ[”š7L¥4VÚCE×]m¤Øy”ä4-dz£œ§¸x.*ã
ÊÊ b÷•h:©‡¦s`BTÁRû¾g⻩‹jø sF¢àJøFl‘È•Xᓁà~*j¯ +(ÚÕ6-£¯÷GŠØy‚<Ç’.F‹Hœw(+)ÜÜâÈzÄäT§FߘãÏ;DmVœ3Àu@mÚüXÝü•3B¨òÌÁÛ<·ÃÜz,Ì@õÅ·d2]ü8s÷IôÞ¯^Ç9¢u„~ëAŸï4«M?
K]­ÅàPl@s_ p:°¬ZR”´›JC[CS.h‹ƒïËœ«Æ]–÷ó‚wR×k7X‰k›‘´ù¦=¡«‰¨¨Â')—71ó’c‡Ðúµ
`é.{§p¹ój\Ž{1h{o±Ý=áUÊïGÖŒõ–-BÄm+AZX¶¡
ïHðæ¥JmÙ;…ä¡Ÿˆ¦ ° äšiÉg«$üMk5¤L“’çÊvïâï	,=f“"íἊ5ô¬x6{ɏžID0e¸vçmi'︧ºð9$ò¹÷*£’9ÿ ²TÔ…×>JV¥}Œ}$p[bÔ®*[jzS*8
”·T›Í–ñUîƒwo$áè=LT™ç—~ô·¤ÈÚ$榍q‰„+´kFm)ž‹©i–ËqÞŠ‰à¶ü( ‚•§ •°ò·‡#5ª•µÊ﯅¡X¨šÁ*F#TXJÊ
ušJVÍ&=iÄs1‚3•'fý§5Ñ<=[íÞ­
PÚ;ѱÌ_~Ä££8rÞ
²w;’hDT°>ÈG¬8Á²ÚzŽ®ò®qZcqJêäÞ-ö[ܘbň±çb“Š¶31²n×iƒðÕ;1¶þÉ
ªX‰,ßqÏ$>•î íZ¥Z 1{ç൵+ƒÕµ¥°T$§K]á»Ûï*·¤tMI’ÂZbŽÕiÒ˜}bÓ0£ª5›¨[5Ž^ÝœWøÂÝh°
¢OWun£¤5 a2Z.G2³YL]jåtì”
ä	ÁÓ‘%"©<ÔúÊ°sº UZvä‡ÄiÆÒM .÷V·™ø#kèýií<NçŽôª¦„lË»{ƒ®<
[¦Y‹éƒ}j•*‚±€I‡e&gbéšp9å^!®€ö?ù^àTzo@Q¨Aêœ& [”…üÔ}пF’Hq‚©´{“ëH·?.½%úå»É Á´9¿¼Ò‰Á¼Ì¥Ús¼zW¶aÃhwÖ…ÑÏ$mò´ë:×Ñγ|”x§
µ0Âз$·aÆn µ†šÇ³£‰Ì®ž
õ@kŽ«gtí䢩ÒP×5¤?µÿ m´Ì^ ‡8¸Á8‹”žÆWÑ ¡™„,Ì“»à‹ÃéV¸®á›ÐÇŽBÀ®Ã…Z”ØÛë8;é|Ñ5)7aÕ&2Ù¸÷©ö—Ð;‡¬7"¿"7M·d
ñœÒÌf5”ê ;"Ãp5¯¬3‹ùJÚÝG›½&¯<{òñKÎÖ“3:¦ÀòGPÅS¨;
à‘Ün´öpð±W)z'¬öÀÖ#Xf2& æ
Œ‹é¾"‹\!Ñ9…
0±2A›*ØMÄ $X
끫ØXÖ,X¥ ô'ËnFÍãlqJXçuaJ4¦„ëµ7ê;h"Zã¾Áä£,vÛ‹’N©E(Öu÷)…ÁaÜÇÔkˆ$‘1kmG¨øtÛ>Ì–ª)µT[)BˆõÑ
xB¾B€ÖT¨.¥~ð@VĶr#¸ü*åZNDŽH;âi 
],©£öØpù(šºãö¼T.uCê•4@ÿ GÕÛ)Cx›®0ø#:ÏðFÒbR\(€€Ä
®fã4Þ‰Fä¯HXƒÅ,†öEÑÔÜ]Öv²?tLÃvBY£ú6Êu5ÅAQ³1‘’¬x–HŒÐ‡ ^	¸KwJôÖŽ5×CÚ¨vÜ«/B0$×k°=ðbÇ(Ï)w±A†Á†	11Í=èQšµ626ŒÜ/`G«µ<}—-Ö7KEHÈÉðóȤmݱû±·ø«Snmá=“ä«šmݱŸ¡¶~ó·“äUóJæúòB|E LêŽy´jDÔ$G¢þÐñ7óR8ýÒ…Ç›	WVe#·Ÿ	p·Fx~•ݤF÷0Èÿ K¯æS<6’¡WШ
;´ÿ ¥Êø\Òuî†åÝ–VNœkÒ7oòX¨Á­Ø÷FÎÑä±g÷ÿ M~Çî=p,X´
ÝÌÚÅ‹
’ÃjÖ.ØöÏñ
qïQ¤ÓZE†° =6·]܈ s¸>v•Ž^Ý\wq9r‰Î\¸¡kURÒ$­*‹Nq?Þª*!sŠÆ:TU_u±T+øX¡
®¹¡,ÄâÃBTsÜ$Ø›4m椴zÜK]’’›Pƒ@€#â˜`é¹=I‡fiV•Ôî“nRm+µFPOhÍ0B£
€+¬5c
v•:P'ÒyÎ ‰V~‚Ó†ÖuókDoh$å\*ö%Ю=£«…aȼ½÷Û.-½VŒŠ¼'lyî±1¬3ó#ÞE¿ÔS¤gV£m›<HqÚ,sVºóÆß¼Hïô…¹…Méi‡Ò" µùEîØÏj|ÓøVOuœ"f’aÞÞëx…˜ÌO`dHHš×4K*H$‡5×
ÚÄ
Â×CUÅAŠŒsr»2°ÄÁiÚ±Çéõe•¶_SÕÆÃ3ˆ•-3´‘¸¡‡cgDîÚ¦ÃcX}'êûJè½9ñìÓ­ä±	×ÓûçÁmO”üVÞ¸÷¥ I~“ÒôhhûýÑwxlïZ¹G¡4ž=”)º£ò
®vÆŽ%UqÝ4qž©­hûÎí‡š§é1R±cÜèðà y' °ôy¦£q§Ýï¬;šÖõ„Sÿ ›  z('S†$Ï}*evÚ¾Kýº8ý
¨å	jÛ]´-‚6«¶ÖK+8ÊiS45jrœèËQDüDØ]R”˜SPÃ
xJÕl>
=§\û"—WU¤ÚǼÿ ÂnÁ
GŒÃ
‚õN	D³õNÚíŒÕ;HôyÄÈ©P¹Ä{:?R‘Ô¨âF÷ø£bÅó® JS|‚R÷ivýáâ€Æé¡è³´IئÑT!§˜•Øª‚¬â@q€wnïCWÄ@JU€ê¯m6]Ï:£âx
'+ÒðXvÓ¦Úm=–´7œ $ì“B£~p%ÕŸUþ« N@¼üï~w˜ñø5®—'Ôe»¤5ã//€ž~‰Tþ›Å7•#¤×Íö
pÄ$ùeåì*«ÓŠEØWEÈsßg¦ûvžSsLpºÊW–âµEWöˬH;™!CYõZÃÄf æ#1W.
\uWâ\,\Çfj’<qTbên›Î[vxx£ë 'ö¨1›˜ÀM¼Pÿ H)ƒêêŒA7s,|F“꺸k³9Ìö*ç®;Ö!Ö$Eiž•¹ÒÚ†ýóéÝû¾ÕS®ó$’NÝäŸz¤5r¦ãÄÃD÷Üø!°ø‡Ô&@m™Ì^Ãä­d	q5Lnÿ N;.6½·N|#ä"1Nƒx“ã<3('&ñß
t  ~ªu”1Tb㫨9ê–›–bìd$ߣ=#ÕãÒmU¯eí$EFù5ýYô櫨æ왍Ǘ±ssM]·á¿
0ÕåJRÓªîiƒ+O58ÖñªŠÒx"	\µâá¨i’¤i
—Ö
”
M+M¤ë9‚‰A¦°Qõ¾ßøK~¼Ã‘g…Ö´~÷Ï[3GUœÒ½#…kàÔ®Ò”‰³·dWV‰IP‰Ú8u¹”E
ÖqLj¾êÕCBš{A^Âß;–¨`¯¬ìö
˼	×tìø.tƐm*n¨y4o&Àx¥n¦×î‡aupáÛj8¿m›è¶ã!o½;ß0y^ý×^EÑ¿ÒjzŒ­)vÚÑnÄL
…^ªô× ‡—‚3k	Îý­hï]içå–îÏ*÷ñþ»Ô
CÒjøjÍznˆ´
¹#b'Fô‹
‰v¥'’à'T´ƒHýÍ%M‰ ƒ&ÆÇŒï1 ‘	–Þ
‰i¬s žR-Ÿ kŠ¬á¬7:þ 0ŒÅÒÕ/aÙ¬ÃÝ#Úøœ
©aiVc‰. ¹¦ãµ”
›Yg¦›ÆÎýº°f³7ƒhá·¸­}&D9¡ÂsÉÙÞèŠõØàC™¨ñbFC|´Ü(ŸƒÚÒ-%»'a	Ì¿)ËÇn¿úÿ ÞŽX…4ÊÅH^ôΑí@ù¹Eh¶“L8Çjù
¼ÎåVªóR©Ï5uÃ
V4lZß®=€xÖŸ–ÑÈ
÷”¨°¾__yM1tÉ?uÆþIkÄgæ@þ[¢†°XÃJ£j·:nkÅ¢u‘}âGzö­/IµèŠ¬¼48q¦F°ŽR¼=ûì{´¯RýicS
ÕÛ íNtÍÙï£,w4rêì®»~x(©Uñ§#Ñ&œÕ¤>ÎåÍÓ9’Ö{9eV­[Öjâ²ãu]˜å2›qÑšÕJç0€sÄ|Êëè0튔bÁ>“{×_F`Ø©ºê:µä,v¤ðfc1±"«ÔÍän1#=·
Âøv~H<Q-Ìk7Æ;•L´©ÙC°.7
¯hKL@ävÊâž$´4¸ð‚¦­R–ÂZ7ÕÃj±·¿rÓrªJ_PÕ.#g¤gÀ)©`ª<KžèÝ'ä©èÒ3rwû€Ø¦ÒƒLf¤
,¿I½{Ƕ8‘$KÝU/Oi>½ÐßA¾¿Ü€Óš]Õ; I¾÷ç‚Qi†î¹9ywÔKG˜áñ zQY—§ÃÕZ07§X‚Áh;ÁM)iÌCH-¯T‘ë|A0{Ò½LÚ–TâÖkÜ’dÀ“rmm»”جPF³ÖcbE§T€ÒxKºû’Ó®7±²(\4ŽÃ¸Uu@j™yĵ;³µ!Á¢b.W¤=mõ´êµKk
¸K^ÜÛ#p*Ü14qkZç5ïë†°5Ï%ÍÛ<Õ¤×Ô¥ê†C	Õ´¼ú$ƒÖ“”]Ù¬qÞÚ[4©ý!ûÏ—Áb쳐XµA¬â~`›Çr¸8ìùÝ䫦<>ä÷«?xs´ÇÑ	/á;¹øüÊÈÙà{"@Žïzâ¬[âß‚ U_<ÇŸ½4èN˜ú61®qŠu ¦þF£»äJ_ˆÙÎ~ ÞAã–Ý„Ï—rŠD;xTž‘ô`É«…suãO`?³à™ô
Lý#Íc5öoæØ‚y´´÷«ZR§<&JÇ+éâô´€i!Àˆ0æAoàðLèÖ-2ŸõW.’t^–(KÁmHµV@xÜÇy®Ñø­â^:Ú3w· 7½¹°ñ¸â¹®:',«Mœ—n­Á+Ãbš
LÈ‘ÄnRÓÅœ%¦²‰¨ùQ:¤f‚ "PÕtô¸…cæl…&˜Ú˜Ôkv‹ž+vŠ,=¢v­6—X
y*¥t£«<™:“aï<QÝ&Ó]i4音äzçáíHÚÕxcòãæäÝÔm퐡 `Â)C×ehÀdHP6ÅMEöZ®Í¨	é¾Tr뢘6*¶;´sÙì]ÊŽŽÛíÉwRÈ´up* Ã	‚m´:Û{·”MUë©õ̤êÔo7:ŽÕ
qÏ'E ˆk^uãT€$Ú$Æ{•ŸBP°al¾Ž©ŒÃ^}äA
,º­$Ü]ºÚ.í:‹¤ÜöXnno7X€¥BÂà ±1ã>Œºîϲ=¦6rO]XI¿Œ÷¤zÚ­›¶ 6÷”w\dü~v®ˆÌk«^m<ÿ ¢‰Õ\)ùºŽ;… lîÙÅEŠ®cѾ@vnMÏ,¼“
ñ•ŽBxðÃzãÇç%3ˆ"}Ù•Åî>
BÉú;Ò]V+P˜F_´ßé>
Øše|ï‡ÄOmFæÇ ãqÞ$/xÐx­z`ï9"œÜij‚!7.\Td…9M‡•iŽ‹¾‘50ÞŽn¥ß4ÉôO¹*í^QêËÜÇÌ8=Ž
§s‰'ÂëÙ«á%Pú[O
†ÅP¯VsŽ°.‰,kc¶ ¬A9n˜XÎ-ÞšN["¹QÕ‰ƒMýÁߺXJæÍaLj¾×Ãmã¾ãÚ uñÒþåQô¦¥
/ÄUx:‚ÍÜ’ Đ©ØÝ3V¨‰ÕnÐ6ó*óúK­«…c ¯U òhsý­jóÔj#,ímŒRµ«lbïUTŒÑ8†Ä0œÏr`ð¡¬É	Ї
ë"À²

™	6¥ f¶¢ÚoܱԷ-<Àî)†a¶ž'Ú»¨TXqØæ¶÷Y
ÄHy˜9ÈIW­YÀuMFë
ºÏ’AqÌ4·/Ú
†ô'i$øä­=Ä
Ý|öK×40è|È6p‘0§)o¥ctî§H+CA-“ xØ|ÐXŠç
l8íºð3Ø:³¤¬KX¯UÿÙ#!/bin/bash
#                               -*- Mode: Sh -*-
# updateConfFile.sh ---
# Author           : Manoj Srivastava ( srivasta@glaurung.green-gryphon.com )
# Created On       : Fri Feb  1 03:41:47 2002
# Created On Node  : glaurung.green-gryphon.com
# Last Modified By : Manoj Srivastava
# Last Modified On : Tue Jun  6 09:48:22 2006
# Last Machine Used: glaurung.internal.golden-gryphon.com
# Update Count     : 186
# Status           : Unknown, Use with caution!
# HISTORY          :
# Description      :
#
# This script attempts to provide conffile like handling for files not
# shipped in a Debian package, but handled by the postinst. Using this
# script, one may ship a bunch of default cofiguration files somewhere
# in /usr (/usr/share/<pkg> is a good location), and maintain files in
# /etc.
#
# The motivation for this script was to provide conffile like handling
# for start files for emacs lisp packages (for example,
# /etc/emacs21/site-stard.d/50psgml-init.el) These start files are not
# shipped with the package, instead, they are installed during the
# post installation configuration phase by the script
# /usr/lib/emacsen-common/emacs-package-install $package_name.
#
# This script is meant to be invoked by the packages install script at
# /usr/lib/emacsen-common/packages/install/$package_name for each
# flavour of installed emacsen by calling it with the proper values of
# new file (/usr/share/emacs/site-lisp/<pkg>/<pkg>-init.el), and dest file
# (/etc/emacs21/site-stard.d/50<pkg>-init.el)), and it should do the rest.
#

# make sure we exit on error
set -e

# set the version and revision
progname="$(basename $0)"
pversion='Revision: 3.00 '

unset GREP_OPTIONS

######################################################################
########                                                     #########
########              Utility functions                      #########
########                                                     #########
######################################################################
setq() {
    # Variable Value Doc_string
    if [ "x$2" = "x" ]; then
	echo >&2 "$progname: Unable to determine $3"
	exit 1;
    else
	if [ "x$VERBOSE" != "x" ]; then
	    echo >&2 "$progname: $3 is $2";
	fi
	eval "$1=\"\$2\"";
    fi
}

# Usage: get_file_metadate file_name
get_file_metadata()
{
    if [ -e "$1" ]; then
        # get file modification date without the nanoseconds and timezone info
        local moddate="$(date +"%F %T" --date $(stat --format '@%Y' "$1"))"
        # print file_name user.group permissions above_date
        stat --format "%n %U.%G 0%a $moddate" "$1"
    else
        echo "/dev/null"
    fi
}

# Runs the diff command with approrpiate arguments
# Usage run_diff diff|sdiff diff_opts old_file new_file
run_diff()
{
    local diff_cmd="$1"
    local diff_opt="$2"
    local old_file="$3"
    local new_file="$4"

    # Note: get_file_metadata not in quotes to ignore "\n" characters
    local old_file_label=$(get_file_metadata "$old_file")
    local new_file_label=$(get_file_metadata "$new_file")

    [ -e "$old_file" ] || old_file=/dev/null
    [ -e "$new_file" ] || new_file=/dev/null

    if [ "$diff_cmd" = "diff" ] ; then
      diff "$diff_opt" --label "$old_file_label" "$old_file" \
            --label "$new_file_label" "$new_file" || true
    elif [ "$diff_cmd" = "sdiff" ] ; then
      # unfortunatelly the sdiff command does not support --label option
      local out="$(sdiff "$diff_opt" "$old_file" "$new_file")" || true
      [ -z "$out" ] || printf "Old file: %s\nNew file: %s\n\n%s" \
                               "$old_file_label" "$new_file_label" "$out"
    else
      echo "Unknown diff command: $diff_cmd" >&2
      exit 1
    fi
}


# Use debconf to show the differences
# Usage: show_diff actual_file_differences file_stat_differences
show_diff() {
    if [ -z "$1" ]; then
	DIFF="There are no non-white space differences in the files."
    else
        if  [ 99999 -lt "$(echo $1 | wc -c | awk '{print $1; }')" ]; then
            DIFF="The differences between the files are too large to display."
        else
            DIFF="$1"
        fi
    fi
    if [ "$DEBCONF_OK" = "YES" ] && [ "$DEBIAN_HAS_FRONTEND" ]; then
	templ=ucf/show_diff
	db_capb escape
	db_subst $templ DIFF "$(printf %s "$DIFF" | debconf-escape -e)"
	db_fset $templ seen false
	db_input critical $templ || true
	db_go || true
	db_get $templ
	# may contain sensitive information, so clear
	# immediatly after use so it is never written
	# to disk
	db_subst $templ DIFF ""
	db_reset $templ
	db_capb
    else
        if [ -z "$my_pager" ]; then
	    echo "$DIFF" | sensible-pager
        else
	    echo "$DIFF" | $my_pager
        fi
    fi
}

withecho () {
        echo "$@" >&2
        "$@"
}

usageversion () {
        cat >&2 <<END
Debian GNU/Linux $progname $pversion.
           Copyright (C) 2002-2005 Manoj Srivastava.
This is free software; see the GNU General Public Licence for copying
conditions.  There is NO warranty.

Usage: $progname  [options] new_file  destination
Options:
     -h,     --help          print this message
     -s foo, --src-dir  foo  Set the src dir (historical md5sums live here)
             --sum-file bar  Force the historical md5sums to be read from
                             this file.  Overrides any setting of --src-dir.
     -d[n], --debug=[n]      Set the Debug level to N. Please note there must
                             be no spaces before the debug level
     -n,     --no-action     Dry run. No action is actually taken.
     -v,     --verbose       Make the script verbose
             --three-way     Register this file in the cache, and turn on the
                             diff3 option allowing the merging of maintainer
                             changes into a (potentially modified) local
                             configuration file. )
             --state-dir bar Set the state directory to bar instead of the
                             default '/var/lib/ucf'. Used mostly for testing.
             --debconf-ok    Indicate that it is ok for ucf to use an already
                             running debconf instance for prompting.
             --debconf-template bar
                             Specify an alternate, caller-provided debconf
                             template to use for prompting.
Usage: $progname  -p  destination
     -p,     --purge         Remove any reference to destination from records

By default, the directory the new_file lives in is assumed to be the src-dir,
which is where we look for any historical md5sums.

END

}

######################################################################
########                                                     #########
########        file and hash save/restore functions         #########
########                                                     #########
######################################################################
purge_md5sum () {
    for i in $(/usr/bin/seq 6 -1 0); do
	if [ -e "${statedir}/hashfile.${i}" ]; then
	    if [ "X$docmd" = "XYES" ]; then
		cp -pf "${statedir}/hashfile.${i}" \
		    "${statedir}/hashfile.$(($i+1))"
	    else
		echo cp -pf "${statedir}/hashfile.${i}" \
                          "${statedir}/hashfile.$(($i+1))"
	    fi
	fi
    done
    if [ -e "$statedir/hashfile" ]; then
	if [ "X$docmd" = "XYES" ]; then
	    cp -pf "$statedir/hashfile"  "$statedir/hashfile.0"
	else
	    echo cp -pf "$statedir/hashfile"  "$statedir/hashfile.0"
	fi
	if [ "X$docmd" = "XYES" ]; then
	    set +e
	    if [ "X$VERBOSE" != "X" ]; then
		echo >&2 "egrep -v [[:space:]]${safe_dest_file}$ $statedir/hashfile"
		egrep -v "[[:space:]]${safe_dest_file}$"  "$statedir/hashfile" >&2 \
		    || true;
	    fi
	    #echo "egrep -v [[:space:]]${safe_dest_file}$ $statedir/hashfile"
	    egrep -v "[[:space:]]${safe_dest_file}$" "$statedir/hashfile" > \
		"$statedir/hashfile.tmp" || true;
	    if [ "X$docmd" = "XYES" ]; then
		mv -f "$statedir/hashfile.tmp"  "$statedir/hashfile"
	    else
		echo mv -f "$statedir/hashfile.tmp"  "$statedir/hashfile"
	    fi
	    set -e
	fi
    fi
    test -n "$VERBOSE" && echo >&2 "The cache file is $cached_file"
    if [ ! -z "$cached_file" -a -f "$statedir/cache/$cached_file" ]; then
	$action rm -f "$statedir/cache/$cached_file"
    fi
}

replace_md5sum () {
    for i in $(/usr/bin/seq 6 -1 0); do
	if [ -e "${statedir}/hashfile.${i}" ]; then
	    if [ "X$docmd" = "XYES" ]; then
		cp -pf "${statedir}/hashfile.${i}" \
		    "${statedir}/hashfile.$(($i+1))"
	    else
		echo cp -pf "${statedir}/hashfile.${i}" \
		    "${statedir}/hashfile.$(($i+1))"
	    fi
	fi
    done
    if [ -e "$statedir/hashfile" ]; then
	if [ "X$docmd" = "XYES" ]; then
	    cp -pf "$statedir/hashfile"  "$statedir/hashfile.0"
	else
	    echo cp -pf "$statedir/hashfile"  "$statedir/hashfile.0"
	fi
	if [ "X$docmd" = "XYES" ]; then
	    set +e
	    if [ "X$VERBOSE" != "X" ]; then
		echo >&2 "(egrep -v \"[[:space:]]${safe_dest_file}$\" \"$statedir/hashfile\";"
		egrep -v "[[:space:]]${safe_dest_file}$"  "$statedir/hashfile" >&2 || true;
		md5sum "$orig_new_file" | sed "s|$orig_new_file|$dest_file|" >&2;
	    fi
	    egrep -v "[[:space:]]${safe_dest_file}$" "$statedir/hashfile" > \
		"$statedir/hashfile.tmp" || true;
	    md5sum "$orig_new_file" | sed "s|$orig_new_file|$dest_file|" >> \
		"$statedir/hashfile.tmp";
	    mv -f "$statedir/hashfile.tmp"  "$statedir/hashfile"
	    set -e
	else
	    echo "(egrep -v \"[[:space:]]${safe_dest_file}$\" \"$statedir/hashfile\""
	    echo " md5sum \"$orig_new_file\" | sed \"s|$orig_new_file|$dest_file|\"; "
	    echo ") | sort > \"$statedir/hashfile\""
	fi
    else
	if [ "X$docmd" = "XYES" ]; then
	    md5sum "$orig_new_file" | sed "s|$orig_new_file|$dest_file|"  > \
		"$statedir/hashfile"
	else
	    echo " md5sum \"$orig_new_file\" | sed \"s|$orig_new_file|$dest_file|\" >" \
		"\"$statedir/hashfile\""
	fi
    fi
    file_size=$(stat -c '%s' "$orig_new_file")
    if [ "X$THREEWAY" != "X" ] || [ "$file_size" -lt 25600 ]; then
	$action cp -pf "$orig_new_file" "$statedir/cache/$cached_file"
    fi
    # cp -pf "$orig_new_file" "$dest_file.${DIST_SUFFIX}"
}

replace_conf_file () {
    # do not mangle $dest_file since it's the one registered in the hashfile
    # or we have been ask to register
    real_file="$dest_file"
    if [ -L "$dest_file" ]; then
	real_file="$(readlink -nf $dest_file || :)"
	if [ "x$real_file" = "x" ]; then
	    echo >&2 "$dest_file is a broken symlink!"
	    $action rm -f "$dest_file";
	    real_file="$dest_file"
	fi
    fi
    if [ -e "$real_file" ]; then
	if [ -z "$RETAIN_OLD" ]; then
	    #echo "Saving  ${real_file}.${OLD_SUFFIX},  in case."
	    if [ "x$VERBOSE" != "x" ]; then
		echo >&2 "Not saving ${real_file}, since it was unmodified"
	    fi
	else
	    $action cp -pf "${real_file}" "${real_file}.${OLD_SUFFIX}"
	fi
    fi
    $action cp -pf "$new_file" "${real_file}"
    replace_md5sum;
}

# Escape single quotes in the arguments passed in
quote_single() {
    echo "$1" | sed -e "s,','\\\\'',g"
}



######################################################################
########                                                     #########
########              Command line args                      #########
########                                                     #########
######################################################################
#
# Long term variables#
#
docmd='YES'
action='withecho'
action=
DEBUG=0
VERBOSE=''
statedir='/var/lib/ucf';
THREEWAY=

DIST_SUFFIX="ucf-dist"
NEW_SUFFIX="ucf-new"
OLD_SUFFIX="ucf-old"
ERR_SUFFIX="merge-error"
# save up the cmdline with proper quoting/escaping
for arg in "$@"; do
    saved="${saved:+$saved }'$(quote_single "$arg")'"
done

# Note that we use `"$@"' to let each command-line parameter expand to a
# separate word. The quotes around `$@' are essential!
# We need TEMP as the `eval set --' would nuke the return value of getopt.
TEMP=$(getopt -a -o hs:d::D::nv -n "$progname" \
      --long help,src-dir:,sum-file:,dest-dir:,debug::,DEBUG::,no-action,purge,verbose,three-way,debconf-ok,debconf-template:,state-dir: \
             -- "$@")

# Note the quotes around `$TEMP': they are essential!
eval set -- "$TEMP"

while true ; do
    case "$1" in
	-h|--help) usageversion;                        exit 0 ;;
	-n|--no-action) action='echo'; docmd='NO';      shift  ;;
	-v|--verbose) VERBOSE=1;                        shift  ;;
	-s|--src-dir)
	    opt_source_dir="$2";                       shift 2 ;;
	--sum-file)
	    opt_old_mdsum_file="$2";		  shift 2 ;;
	--state-dir)
	    opt_state_dir="$2";                        shift 2 ;;
	--debconf-template)
	    override_template="$2";                    shift 2 ;;
	-D|-d|--debug|--DEBUG)
            # d has an optional argument. As we are in quoted mode,
            # an empty parameter will be generated if its optional
            # argument is not found.
	    case "$2" in
		"") setq DEBUG 1    "The Debug value"; shift 2 ;;
		*)  setq DEBUG "$2" "The Debug value"; shift 2 ;;
	    esac ;;
        -p|--purge) PURGE=YES;                         shift   ;;
       --three-way) THREEWAY=YES;                       shift   ;;
       --debconf-ok) DEBCONF_OK=YES;                    shift   ;;
	--)  shift ;                                   break   ;;
	*) echo >&2 "Internal error!" ; exit 1 ;;
    esac
done


######################################################################
########                                                     #########
########              Sanity checking                        #########
########                                                     #########
######################################################################
# Need to run as root, or else the
if test "$(id -u)" != 0; then
    if [ "$docmd" = "YES" ]; then
        echo "$progname: Need to be run as root." >&2
        echo "$progname: Setting up no action mode." >&2
        action='echo'; docmd='NO';
    fi
fi

if [ "X$PURGE" = "XYES" ]; then
    if [ $# != 1 ]; then
	echo >&2 "*** ERROR: Need exactly one argument when purging, got $#";
	echo >&2 ""
	usageversion;
	exit 2 ;
    fi
    temp_dest_file="$1";
    if [ -e "$temp_dest_file" ]; then
        setq dest_file "$(readlink -q -m $temp_dest_file)" "The Destination file";
    else
        setq dest_file "$temp_dest_file" "The Destination file";
    fi
else
    if [ $# != 2 ]; then
	echo >&2 "*** ERROR: Need exactly two arguments, got $#";
	echo >&2 ""
	usageversion;
	exit 2 ;
    fi
    temp_new_file="$1";
    temp_dest_file="$2";

    if [ ! -e "${temp_new_file}" ]; then
	echo >&2 "Error: The new file ${temp_new_file} does not exist!";
	exit 1;
    fi
    setq new_file  "$(readlink -q -m $temp_new_file)"  "The new file";
    if [ -e "$temp_dest_file" ]; then
        setq dest_file "$(readlink -q -m $temp_dest_file)" "The Destination file";
    else
        setq dest_file "$temp_dest_file" "The Destination file";
    fi
fi


safe_dest_file=$(echo "$dest_file" | perl -nle 'print "\Q$_\E\n"')



######################################################################
########                                                     #########
########              Set Default Values                     #########
########                                                     #########
######################################################################
# Load site defaults and over rides.
if [ -f /etc/ucf.conf ]; then
    . /etc/ucf.conf
fi

# Command line, env variable, config file, or default
if [ ! "x$opt_source_dir" = "x" ]; then
    setq source_dir "$opt_source_dir" "The Source directory"
elif [ ! "x$UCF_SOURCE_DIR" = "x" ]; then
    setq source_dir "$UCF_SOURCE_DIR" "The Source directory"
elif [ ! "x$conf_source_dir" = "x" ]; then
    setq source_dir "$conf_source_dir" "The Source directory"
else
    if [ "X$new_file" != "X" ]; then
	setq source_dir "$(dirname $new_file)" "The Source directory"
    else
	setq source_dir "/tmp" "The Source directory"
    fi

fi

if [ "X$PAGER" != "X" ] && which "$PAGER" >/dev/null 2>&1 ; then
    my_pager="$(which $PAGER)";
elif [ -s /usr/bin/pager ] &&
     [ "X$(readlink -e /usr/bin/pager || :)" != "X" ]; then
    my_pager=/usr/bin/pager
elif [ -x /usr/bin/sensible-pager ]; then
    my_pager=/usr/bin/sensible-pager
elif [ -x /bin/more ]; then
    my_pager=/bin/more
else
    my_pager=
fi


# Command line, env variable, config file, or default
if [ ! "x$opt_state_dir" = "x" ]; then
    setq statedir "$opt_state_dir" "The State directory"
elif [ ! "x$UCF_STATE_DIR" = "x" ]; then
    setq statedir "$UCF_STATE_DIR" "The State directory"
elif [ ! "x$conf_state_dir" = "x" ]; then
    setq statedir "$conf_state_dir" "The State directory"
else
    setq statedir '/var/lib/ucf'  "The State directory"
fi

# Command line, env variable, config file, or default
if [ ! "x$opt_force_conffold" = "x" ]; then
    setq force_conffold "$opt_force_conffold" "Keep the old file"
elif [ ! "x$UCF_FORCE_CONFFOLD" = "x" ]; then
    setq force_conffold "$UCF_FORCE_CONFFOLD" "Keep the old file"
elif [ ! "x$conf_force_conffold" = "x" ]; then
    setq force_conffold "$conf_force_conffold" "Keep the old file"
else
    force_conffold=''
fi

# Command line, env variable, config file, or default
if [ ! "x$opt_force_conffnew" = "x" ]; then
    setq force_conffnew "$opt_force_conffnew" "Replace the old file"
elif [ ! "x$UCF_FORCE_CONFFNEW" = "x" ]; then
    setq force_conffnew "$UCF_FORCE_CONFFNEW" "Replace the old file"
elif [ ! "x$conf_force_conffnew" = "x" ]; then
    setq force_conffnew "$conf_force_conffnew" "Replace the old file"
else
    force_conffnew=''
fi

# Command line, env variable, config file, or default
if [ ! "x$opt_force_conffmiss" = "x" ]; then
    setq force_conffmiss "$opt_force_conffmiss" "Replace any missing files"
elif [ ! "x$UCF_FORCE_CONFFMISS" = "x" ]; then
    setq force_conffmiss "$UCF_FORCE_CONFFMISS" "Replace any missing files"
elif [ ! "x$conf_force_conffmiss" = "x" ]; then
    setq force_conffmiss "$conf_force_conffmiss" "Replace any missing files"
else
    force_conffmiss=''
fi

if [ -n "$opt_old_mdsum_file" ]; then
    setq old_mdsum_file "$opt_old_mdsum_file" "The md5sum is found here"
elif [ ! "x$UCF_OLD_MDSUM_FILE" = "x" ]; then
    setq old_mdsum_file "$UCF_OLD_MDSUM_FILE" "The md5sum is found here"
elif [ ! "x$conf_old_mdsum_file" = "x" ]; then
    setq old_mdsum_file "$conf_old_mdsum_file" "Replace the old file"
elif [ ! "x${new_file}" = "x" ]; then
    old_mdsum_file="$source_dir/$(basename ${new_file}).md5sum";
else
    old_mdsum_file="";
fi


######################################################################
########                                                     #########
########               More Sanity checking                  #########
########                                                     #########
######################################################################
if [ "X$force_conffold" != "X" -a "X$force_conffnew" != "X" ]; then
    echo >&2 "Error: Only one of force_conffold and force_conffnew should";
    echo >&2 "       be set";
    exit 1;
fi

# VERBOSE of 0 is supposed to be the same as not setting VERBOSE
if [ "X$VERBOSE" = "X0" ]; then
    VERBOSE=''
fi


#
if [ -e "$statedir/hashfile" -a ! -w "$statedir/hashfile" ]; then
    echo >&2 "ucf: do not have write privilege to the state data"
    if [ "X$docmd" = "XYES" ]; then
	exit 1;
    fi
fi

if [ ! -d $statedir/cache ]; then
    $action mkdir -p $statedir/cache ;
fi

# test and see if this file exists in the database
if [ -e "$statedir/hashfile" ]; then
    if [ "X$VERBOSE" != "X" ]; then
	echo >&2 "The hash file exists"
	echo >&2 egrep "[[:space:]]${safe_dest_file}$" "$statedir/hashfile"
	egrep "[[:space:]]${safe_dest_file}$" "$statedir/hashfile" >&2 || true
    fi
    lastsum=$(egrep "[[:space:]]${safe_dest_file}$" "$statedir/hashfile" | \
                   awk '{print $1;}' )
fi

if [ ! "x${new_file}" = "x" ]; then
    old_mdsum_dir="$source_dir/"$(basename "${new_file}")".md5sum.d";
else
    old_mdsum_dir="";
fi

cached_file="$(echo $dest_file | tr / :)"
######################################################################
########                                                     #########
########                  Debugging dump                     #########
########                                                     #########
######################################################################

if [ $DEBUG -gt 0 ]; then
    cat >&2 <<EOF
The new start file is      \`$new_file\'
The destination is         \`$dest_file\' (\`$safe_dest_file\')
The history is kept under  \'$source_dir\'
The file may be cached at \'$statedir/cache/$cached_file\'
EOF
    if [ -s "$dest_file" ]; then
	echo "The destination file exists, and has md5sum:"
	md5sum "$dest_file"
    else
	echo "The destination file does not exist."
    fi
    if [ "X$lastsum" != "X" ]; then
	echo "The old md5sum exists, and is:"
	echo "$lastsum"
    else
	echo "The old md5sum does not exist."
        if [ -d "$old_mdsum_dir" -o -f "$old_mdsum_file" ]; then
            echo "However, there are historical md5sums around."
        fi
    fi
    if [ -e "$new_file" ]; then
	echo "The new file exists, and has md5sum:"
	md5sum "$new_file"
    else
	echo "The new file does not exist."
    fi
    if [ -d "$old_mdsum_dir" ]; then
	echo "The historical md5sum dir $old_mdsum_dir exists"
    elif [ -f "$old_mdsum_file" ]; then
	echo "The historical md5sum file $old_mdsum_file exists"
    else
	echo "Historical md5sums are not available"
    fi
fi

######################################################################
########                                                     #########
########        Short circuit if we are purging              #########
########                                                     #########
######################################################################

if [ "X$PURGE" = "XYES" ]; then
    if [ "X$VERBOSE" != "X" ]; then
	echo >&2 "Preparing to purge ${dest_file}"
    fi
    purge_md5sum;
    exit 0;
fi


# now we can restore $@
eval set -- "$saved"

######################################################################
########                                                     #########
########                  DebConf stuff                      #########
########                                                     #########
######################################################################

# Is debconf already running? Kinda tricky, because it will be after the
# confmodule is sourced, so only test before that.
if [ -z "$DEBCONF_ALREADY_RUNNING" ]; then
    if [ "$DEBIAN_HAS_FRONTEND" ]; then
	DEBCONF_ALREADY_RUNNING='YES'
    else
	DEBCONF_ALREADY_RUNNING='NO'
    fi
fi

export DEBCONF_ALREADY_RUNNING

if [ -z "$DEBCONF_OK" ]; then
    if [ "$DEBCONF_ALREADY_RUNNING" = 'YES' ]; then
	DEBCONF_OK='NO'
    else
	DEBCONF_OK='YES'
    fi
fi

# Time to start nagging the users who call ucf without debconf-ok
if [ "$DEBCONF_ALREADY_RUNNING"  = 'YES' ] && [ "$DEBCONF_OK" = NO ]; then
	# Commented out for now, uncomment after a while to begin nagging
	# maintainers to fix their scripts.
	cat \
<<END
*** WARNING: ucf was run from a maintainer script that uses debconf, but
             the script did not pass --debconf-ok to ucf. The maintainer
             script should be fixed to not stop debconf before calling ucf,
             and pass it this parameter. For now, ucf will revert to using
             old-style, non-debconf prompting. Ugh!

             Please inform the package maintainer about this problem.
END
fi

# Start up debconf or at least get the db_* commands available
if [ -e /usr/share/debconf/confmodule ]; then
    if test "$(id -u)" = 0; then
	. /usr/share/debconf/confmodule

	# Load our templates, just in case our template has
	# not been loaded or the Debconf DB lost or corrupted
	# since then, but only if it is OK to use debconf.
        if [ "$DEBCONF_OK" = 'YES' ]; then
            db_x_loadtemplatefile "$(dpkg-query --control-path ucf templates)" ucf
        fi
    else
        echo >&2 "$progname: Not loading confmodule, since we are not running as root."
    fi
    # Only set the title if debconf was not already running.
    # If it was running, then we do not want to clobber the
    # title used for configuring the whole package with debconf.
    if [ "$DEBCONF_ALREADY_RUNNING" = 'NO' ]; then
	if ! db_settitle ucf/title 2>/dev/null; then
      	    # Older debconf that does not support that command.
            if test "$(id -u)" = 0; then
		db_title "Modified configuration file"
            else
                echo >&2 "$progname: Not changing title, since we are not running as root."
            fi
	fi
    fi
fi



######################################################################
########                                                     #########
########                Start Processing                     #########
########                                                     #########
######################################################################

orig_new_file="$new_file"	# Since sometimes we replace the newfile below
newsum=$(md5sum "$new_file" | awk '{print $1}')

# Determine the action for the current file. The default is to ask,
# with non-replacement being the norm.
# If the config dir exists
#   if file in always overwrite, state +=1;
#   fi
#   if file in never overwrite, state +=2;
#   fi
#   if file in ask; state +=4
#   fi
#   if state == 0; then state = default
#   if state >= 4; ask
#   if state == 3;  ask
#   if state == 2; exit
#   if state == 1; then replace_conffile; exit

######################################################################
########                                                     #########
########               Do the replacement                    #########
########                                                     #########
######################################################################
# Step 1: If we have no record of this file, and dest file
#         does, We need to determine how to initialize the
#         ${old_mdsum_prefix}.old file..
if [ -e "$dest_file" ]; then
    destsum=$(md5sum "$dest_file"  | awk '{print $1}');
    if [ "X$lastsum" = "X" ]; then
#      a: If we have a directory containing historical md5sums of this
#         file in question, we should look and see if the currently
#         installed file matches any of the old md5sums; in which case
#         it can be silently replaced.
	if [ -d "$old_mdsum_dir" -o -f "$old_mdsum_file" ]; then
	    if [ -d "$old_mdsum_dir"  ]; then
		for file in ${old_mdsum_dir}/*; do
		    oldsum="$(awk '{print $1}' $file)";
		    if [ "$oldsum" = "$destsum"  ]; then
			if [ "X$force_conffold" = "X" ]; then
#                           Bingo! replace, set the md5sum, and we are done
			    if [ "X$VERBOSE" != "X" ]; then
				echo >&2 \
				    "Replacing config file $dest_file with new version"
			    fi
			    replace_conf_file;
			    exit 0;
			else
			    replace_md5sum;
			    cp -pf "$orig_new_file" "$dest_file.${DIST_SUFFIX}"
			    exit 0;
			fi
		    fi
		done
	    elif [ -f "$old_mdsum_file" ]; then
		oldsum=$(egrep "^${destsum}" "$old_mdsum_file" || true)
		if [ "X$oldsum" != "X" ]; then
#                    Bingo
		    if [ "X$force_conffold" = "X" ]; then
			if [ "X$VERBOSE" != "X" ]; then
			    echo >&2 \
				"Replacing config file $dest_file with new version"
			fi
			replace_conf_file;
			exit 0;
		    else
			replace_md5sum;
			cp -pf "$orig_new_file" "$dest_file.${DIST_SUFFIX}"
			exit 0;
		    fi
		fi
	    fi
#	   Well, nothing matched. We now check to see if the
#	   maintainer has an opinion on how to set the ``md5sum of the
#	   previously installed version'', since we have no way of
#	   determining that automatically. Please note that unless
#	   there are limited number of previously released packages
#	   (like just one), the maintainer is also making a guess at
#	   this point by supplying a historical md5sum default file.
	    if [ "X$VERBOSE" != "X" ]; then
		echo >&2 "Histotical md5sums did not match."
	    fi
	    if [ -d "$old_mdsum_dir"  ]; then
		if [ -e "${old_mdsum_dir}/default" ]; then
		    if [ "X$VERBOSE" != "X" ]; then
			echo >&2 "However, a default entry exists, using it."
		    fi
		    lastsum="$(awk '{print $1;}' ${old_mdsum_dir}/default)"
		    do_replace_md5sum=1;
		fi
	    elif [ -f "$old_mdsum_file" ]; then
		oldsum=$(egrep "[[:space:]]default$" "$old_mdsum_file" | \
		    awk '{print $1;}')
		if [ "X$oldsum" != "X" ]; then
#                    Bingo
		    lastsum=$oldsum;
		    do_replace_md5sum=1;
		fi
	    fi
	fi

#       At this point, we are almost certain that either the
#       historical record of md5sums is not complete, or the user has
#       changed the configuration file. Rather than guessing and
#       chosing one of the historical md5sums, we fall through to the
#       solution used if there had been no historical md5sums
#       directory/file.
	if [ "X$lastsum" = "X" ]; then
#      b: We do not have a historical list of md5sums, or none
#         matched, and we still need to initialize the
#         ${old_mdsum_prefix}.old file. We can't determine whther or
#         not they made any changes, so we err on the side of caution
#         and ask'
	    if [ "X$VERBOSE" != "X" ]; then
		echo >&2 "No match found, we shall ask."
	    fi
	    lastsum='AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA';
	fi # the old md5sum file does not exist, and the historical
	   # record failed
    fi # the old md5sum file does not exist (bug))
else  # "$dest_file" does not exist
# Step 2: If destfile does not exist, create it, set the file
#         "${old_mdsum_prefix}.old" to the md5sum of the new file, and we
#         are done
    if [ "X$lastsum" = "X" ]; then
        # Ok, so there is no indication that the package was ever
        # installed on this machine.
	echo >&2 ""
	echo >&2 "Creating config file $dest_file with new version"
	replace_conf_file;
	exit 0;
    elif [ "$lastsum" = "$newsum" ]; then
        # OK, new version of the file is the same as the last version
        # we saw. Since the user apparently has deleted the file,
        # nothing needs be done, unless we have been told differently
        if [ "X$force_conffmiss" != "X" ]; then
            echo >&2 ""
	    echo >&2 "Recreating deleted config file $dest_file with new version, as asked"
	    replace_conf_file;
	    exit 0;
        else
            echo >&2 "Not replacing deleted config file $dest_file";
        fi

    else
        # OK. New upstream version.
        if [ "X$force_conffmiss" != "X" ]; then
            # User has said to replace missing files, so we do so, no
            # questions asked.
            echo >&2 ""
	    echo >&2 "Recreating deleted config file $dest_file with new version, as asked"
	    replace_conf_file;
	    exit 0;
        else
            # Even though the user has deleted this file, they should
            # be asked now, unless specified otherwise.
            if [ "X$force_conffold" = "X" ]; then
                destsum='AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA';
            else
                exit 0;
	    fi
        fi
    fi
fi

# Here, the destfile exists.

# step 3: If the old md5sum and the md5sum of the new file
#         do not match, we need to take action.
if [ "$lastsum" = "$newsum" ]; then
    if [ "X$VERBOSE" != "X" ]; then
	echo >&2 "md5sums match, nothing needs be done."
    fi
    if [ "X$do_replace_md5sum" != "X" ]; then
	replace_md5sum;
    fi
    exit 0;			# Hah. Match. We are done.
fi
#      a: If the md5sum of the dest file is the same as lastsum, replace the
#         destfile, saying we are replacing old config files
if [ "$destsum" = "$lastsum" ]; then
    if [ "X$force_conffold" = "X" ]; then
	echo >&2 "Replacing config file $dest_file with new version"
	replace_conf_file;
	exit 0;
    else
	replace_md5sum;
	cp -pf "$orig_new_file" "$dest_file.${DIST_SUFFIX}"
	exit 0;
    fi
else
#      b: If the md5sum of the dest file differs from lastsum, we need to ask
#         the user what action to take.
    if [ "X$force_conffnew" != "X" ]; then
	echo >&2 "Replacing config file $dest_file with new version"
	echo >&2 "since you asked for it."
        if [ "$destsum" = "$newsum" ]; then
            echo >&2 "The new and the old files are identical, AFAICS"
        else
            echo >&2 "The new and the old files are different"
        fi
	replace_conf_file;
	exit 0;
    fi
    if [ "X$force_conffold" != "X" ]; then
	replace_md5sum;
	cp -pf "$orig_new_file" "$dest_file.${DIST_SUFFIX}"
	exit 0;
    fi
#      c: If the destination file is the same as the new maintianer provided one,
#         we need do nothing.
    if [ "$newsum" = "$destsum" ]; then
	if [ "X$VERBOSE" != "X" ]; then
	    echo >&2 "md5sums of the file in place matches, nothing needs be done."
	fi
	replace_md5sum;
	exit 0;			# Hah. Match. We are done.
    fi


    done='NO';
    while [ "X$done" = "XNO" ]; do
	if [ "$DEBCONF_OK" = "YES" ] && [ "$DEBIAN_HAS_FRONTEND" ]; then
		# Use debconf to prompt.
		if [ -e "$statedir/cache/$cached_file" ] && [ "X$THREEWAY" != "X" ]; then
			templ=ucf/changeprompt_threeway
		else
			templ=ucf/changeprompt
		fi
		if [ "X$override_template" != "X" ]; then
			choices="$(db_metaget $templ Choices-C)"
			choices2="$(db_metaget $override_template Choices-C)"
			if [ "$choices" = "$choices2" ]; then
				templ=$override_template
			fi
		fi
		db_fset "$templ" seen false
		db_reset "$templ"
		db_subst "$templ" FILE "$dest_file"
		db_subst "$templ" NEW  "$new_file"
		db_subst "$templ" BASENAME "$(basename $dest_file)"
		db_input critical "$templ" || true
		if ! db_go; then
			# The current ucf interface does not provide a way for it
			# to tell its caller that the user chose to back up.
			# However, we could get here, if the caller turned on
			# debconf's backup capb. The best thing to do seems to be
			# to ignore requests to back up.
			continue
		fi
		db_get "$templ"
		ANSWER="$RET"
	else
            echo >&2 "Need debconf to interact"
            exit 2
########################################################################################
# 		# Prompt without using debconf.                                        #
# 		cat >&2 <<EOPRMT                                                       #
# Configuration file \`$dest_file'                                                     #
#  ==> File on system created by you or by a script.                                   #
#  ==> File also in package provided by package maintainer.                            #
#    What would you like to do about it ?  Your options are:                           #
#     Y or I  : install the package maintainer's version                               #
#     N or O  : keep your currently-installed version                                  #
#       D     : show the differences between the versions                              #
#       S     : show the side-by-side differences between the versions                 #
# EOPRMT                                                                               #
# 		if [ "X$THREEWAY" != "X" -a -e "$statedir/cache/$cached_file" ]; then  #
# 			cat >&2 <<EOTD                                                 #
#     3 or T  : show a three way difference between current, older,                    #
#               and new versions of the file                                           #
#       M     : Do a 3 way merge between current, older,                               #
#               and new versions of the file [Very Experimental]                       #
# EOTD                                                                                 #
# 		fi                                                                     #
# 		cat >&2 <<EOPEND                                                       #
#       Z     : start a new shell to examine the situation                             #
#  The default action is to keep your current version.                                 #
# EOPEND                                                                               #
# 		if [ "X$THREEWAY" != "X" -a -e "$statedir/cache/$cached_file" ]; then  #
# 			echo -n >&2 "*** " $(basename "$dest_file") \                  #
# 			    " (Y/I/N/O/D/3/T/M/Z) [default=N] ?"                       #
# 		else                                                                   #
# 			echo -n >&2 "*** " $(basename "$dest_file") \                  #
# 			    " (Y/I/N/O/D/Z) [default=N] ?"                             #
# 		fi                                                                     #
#   		read -e ANSWER </dev/tty                                               #
########################################################################################
	fi

	case "$ANSWER" in
	    install_new|y|Y|I|i)
		echo >&2 "Replacing config file $dest_file with new version"
		RETAIN_OLD=YES
		replace_conf_file;
		exit 0;
		;;
	    diff|D|d)
		DIFF="$(run_diff diff -uBbwt "$dest_file" "$new_file")"
		show_diff "$DIFF"
		;;
	    sdiff|S|s)
		DIFF="$(run_diff sdiff -BbW "$dest_file" "$new_file")"
		show_diff "$DIFF"
		;;
	    diff_threeway|3|t|T)
		if [ -e "$statedir/cache/$cached_file" \
		    -a "X$THREEWAY" != "X" ]; then
                    if [ -e "$dest_file" ]; then
		        DIFF="$(diff3 -L Current -L Older -L New -A \
			    "$dest_file" "$statedir/cache/$cached_file" \
			    "$new_file")"  || true
                    else
                        DIFF="$(diff3 -L Current -L Older -L New -A \
			    /dev/null "$statedir/cache/$cached_file" \
			    "$new_file")"  || true
                    fi
		    show_diff "$DIFF"
		else
		    DIFF="$(run_diff diff -uBbwt "$dest_file" "$new_file")"
		    show_diff "$DIFF"
		fi
		;;
	    merge_threeway|M|m)
		echo >&2 "Merging changes into the new version"
		if [ -e "$statedir/cache/$cached_file" \
		    -a "X$THREEWAY" != "X" ]; then
		    ret=0
		    diff3 -L Current -L Older -L New -m \
			"$dest_file" "$statedir/cache/$cached_file" \
			"$new_file" > "$dest_file.${NEW_SUFFIX}" || ret=$?
                    case "$ret" in
                        0)
		            new_file="$dest_file.${NEW_SUFFIX}"
		            RETAIN_OLD=YES
		            replace_conf_file
			    rm -f "$dest_file.${NEW_SUFFIX}" # don't need this around no mo'
			    exit 0
                            ;;
                        *)
			    mv "$dest_file.${NEW_SUFFIX}" "$dest_file.${ERR_SUFFIX}"
			    db_subst ucf/conflicts_found dest_file "$dest_file"
			    db_subst ucf/conflicts_found ERR_SUFFIX "${ERR_SUFFIX}"
			    db_input critical ucf/conflicts_found || true
			    db_go || true
			    ;;
                    esac
		else
		    replace_conf_file
		    rm -f "$dest_file.${NEW_SUFFIX}" # don't need this around no mo'
		    exit 0
		fi
		;;
	    shell|Z|z)
                # We explicitly connect STDIN and STDOUT to the
                # script's controlling terminal, so even if STDIN is
                # fed by a pipe, as is the case when run from
                # /usr/bin/debconf, the shell should be fully
                # functional. However, the test for a controlling
                # terminal uses /usr/bin/tty, which consults only
                # STDIN. As far as I can tell, when run from debconf,
                # ucf will _never_ use the current terminal. If the
                # goal is to check for access to a terminal, the test
                # should be for foreground process group membership,
                # not a terminal connected to STDIN (tty -s), and not
                # a terminal it doesn't necessarily own (tty -s
                # </dev/tty). The easiest way do this from a shell is
                # probably with /bin/ps.
                if ps -o stat= --ppid $$ | grep -q '+'; then
		    bash >/dev/tty </dev/tty || true
                elif [ -n "$DISPLAY" ]; then
                    x-terminal-emulator || true
                else
                    # Don't know what to do
                    echo >&2 "No terminal, and no DISPLAY set, can't fork shell."
                    sleep 3;
                fi
		;;
	    keep_current|n|N|o|O|'')
		replace_md5sum;

		cp -pf "$orig_new_file" "$dest_file.${DIST_SUFFIX}"
		exit 0;
		;;
	    *)
		if [ "$DEBCONF_OK" = "YES" ]; then
			echo "Error: unknown response from debconf:'$RET'" >&2
			exit 1
		else
			echo
			echo "Please answer with one of the single letters listed." >&2
			echo
		fi
	esac
    done
fi

db_stop

exit 0;