Linuxers September 2002

linuxers@mm.ilug-bom.org.in

92 participants
165 discussions

Re: [ILUG-BOM] whats obfuscation
by Sankha Subhra Som 26 Sep '02

26 Sep '02

Hi Yes it prints n! and is pretty good at doing that(large precision) I commented out the #include<stdio.h> and ran the preprocessor on the original file. Then i ran indent on the result to give it a decent look. Then i changed all the variables to more meaningful ones. The thirteenth line looks something like this for (l = 0; l < 14; putchar ("\t\"8)>l\"9!.)>vl"[l] ^ 'L'), ++l); It is supposed to print something like "Enter number: " The perplexing part is the putchar() in the loop Taking a close look at it you can see that he has a 14 character striing in the quotes "\t\"8)>l\"9!.)>vl" .This he indexes by [l]. While the loop executes he extracts each character systematically and does an bitwise exclusive OR with 'L' and prints the resulting character.This prints the string. Now the question why does he do an XOR with 'L' is easy. He could have done an XOR with nethin for the matter but then the string in quotes would have been different. If a XOR b = c then a XOR c = b This explains the 13th line. Will try to make sense out of the remaining code. -- SANKHA SUBHRA SOM ATC - BIOINFORMATICS TCS KLK BUILDING. HYDERABAD-1 Ph:(040)6787980-1024 ******************************************************** An anonymous digitoid ******************************************************** Everything happens to everybody sooner or later if there is time enough.

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Re: Buggy C prog
by Amish Mehta 26 Sep '02

26 Sep '02

Hint: 1) You cant bury someone without digging hole. If you dont make(allocate) space you cant store(read) things. 2) Think gets() Amish. Nikhil Joshi wrote: >I've tried this simple prog to encrypt a file using XOR > >But it gives "Segmentation Fault " in 'interactive' mode (pls see the >source code)

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Re: whats obfuscation..FUN
by Gurpreet Singh 26 Sep '02

26 Sep '02

hi i did go thru the confusy contest. the code i wrote was not as confusing as the one just posted on the LUG (wish i had checked mail earlier). i used names like pepsi coke sprite, burger, pizza etc etc by #defines for printf scanf etc etc . even used mullllllllllllllllltiple function jumps to just do simple things. It was real FUN... results will comeout tomm let see. i think i messed up in the debugging round... gurpreet

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Sendmail smtp problem
by Satsonic 26 Sep '02

26 Sep '02

i need suggestion from u, theres some configuration problem i h've setup linux 7.3 Redhat with iptables firewall, n squid proxy server now i want to configure sendmail as a mail server for internal lan user the requirement is users from lan should able to send mails through windows machine with the help of outlook express, i already have a pop3 address for receiving mails from internet for example xyz.com, so receiving is not a problem but i need to configure my gateway such a way that user from lan (windows 98 / 2000 + outlook express installed ) should able to send mails to anyone from outlook express through gatway. pls tell me abt this from scratch that how should i setup sendmail to do this task, i dont h've any registered domain name i h've 64 kbps leased line with static ip n isp dns if i use mail programme on gateway to send mails to xyz(a)yahoo.com it works now i want same thing should happen from client machine i h've done SNAT on some machines Thanx Satsonic

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[Announce] [ACM] Seminar: Resource Description Framework - Sep 27
by Philip S Tellis 26 Sep '02

26 Sep '02

Hello friends, We at ACM Mumbai are organizing a seminar on RDF, which is a general purpose language for representing information in the WWW and meant primarily for representing metadata about web-resources. The seminar titled "Resource Description Framework" is to be held on Fri Sep 27, 2002 -- *6:30 pm* at NCST, Gulmohar Cross Road 9, Juhu, Mumbai 400049. [Landmark: Copper Chimney Restaurant]. (road map available at http://www.ncst.ernet.in/contactus/) Please note that the seminar is at 6:30pm and NOT at 5:35pm as written erroneously in the ACM Mumbai newsletter. We look forward to seeing you at the seminar. The abstract of the seminar is given below: Resource Description Framework(RDF) is a emerging standard monitored by W3C for describing resources on the web. The seminar will cover what exactly RDF is, how it can be useful to describe not only resources on the web but any metadata, and the future of RDF. The talk will be full of examples and practical discussion on RDF. About the speaker: Dharmesh Maniyar is a Staff Scientist in Education Technology Unit(ETU) working at NCST Kharghar. His areas of interest are Online Learning, Data Mining and Machine Learning. - JJH for ACM, Mumbai.

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Re: Simputer....
by WERNER K HEISENBERG 26 Sep '02

26 Sep '02

>From: "Vinay L Deshpande" <vinay(a)ncoretech.com> >Subject: [india-gii] Reply to Scott McCollum on his >article on Simputer ..schnitt........... Way to go, Mr Vinay. That was one heck of a verbal gut punch. Fantastic oratory! Anyone with even an iota of self-respect would lie down and die quietly, after that. I guess [and hope] that puts paid to the paleface! I hope the following line would round off the massacre! "Amateurs built the Ark! Professionals built the Titanic." Keep it up! A billion plus are behind you, I'm sure, only they don't know it yet. Brgds Werner ____________________________________________________________ Tired of all the SPAM in your inbox? Switch to LYCOS MAIL PLUS http://www.mail.lycos.com/brandPage.shtml?pageId=plus

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whats obfuscation
by Gurpreet Singh 26 Sep '02

26 Sep '02

hi can someone plz tell me what obfuscation exactly is, and how to obfuscate some code given to u. actually we have an upcoming comptt. in goa college of engg. and there is this even which is called "dubugsy n obfuscy" where we have to obfuscate and debug some code tha'll be gven ot us and do this ON PAPER... SOS aaaaaaaaeee Gurpreet

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installing linux from hdd
by Harsh R Busa 25 Sep '02

25 Sep '02

i have a linux 7.1 installed along windows managed by lilo while upgrading to rh7.3 the cdrom cudnt live upto it and stops reading midway. this messed up my earlier installation. i got rh7.3 cds dumped on my hdd e:\rh73 (which is /dev/hda6 iguess) tree is soemthing like this e:\rh73 -> images -> dosutils -> RedHat -> RPMS -> base etc i started the installation from command prompt using autoboot.bat a part of dosutils now installation starts and asks me to select partition and then enter directory names. i have tried every possible dir names and partition name plz tell me how to identify / specify directory names holding installation files.. take care harsh

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help in GNOME installtion
by Sachin 25 Sep '02

25 Sep '02

hi there i have tried to install gnome1.4 i have got some problem [errors] can u suggest what is GLIBC_2.3 ? is it provided by glibc-2.290 if not then what provides GLIBC_2.3 btwn my rpm installer is not very best at configuration thanx sachin #-------------------------------------------------------------------------------------------------------------------------------- 83:gnome-session ########################################### [ 82%] gconftool-2: /lib/libc.so.6: version `GLIBC_2.3' not found (required by /usr/lib/libpopt.so.0) gconftool-2: /lib/libc.so.6: version `GLIBC_2.3' not found (required by /usr/lib/libpopt.so.0) error: execution of %post scriptlet from gnome-session-2.0.7.0.200209080026-0.snap.ximian.1 failed, exit status 1 84:gnome-system-monitor ########################################### [ 83%] gconftool-2: /lib/libc.so.6: version `GLIBC_2.3' not found (required by /usr/lib/libpopt.so.0) gconftool-2: /lib/libc.so.6: version `GLIBC_2.3' not found (required by /usr/lib/libpopt.so.0) error: execution of %post scriptlet from gnome-system-monitor-2.0.2.0.200209080026-0.snap.ximian.1 failed, exit status 1 85:gnome-utils2 ########################################### [ 84%] gconftool-2: /lib/libc.so.6: version `GLIBC_2.3' not found (required by /usr/lib/libpopt.so.0) gconftool-2: /lib/libc.so.6: version `GLIBC_2.3' not found (required by /usr/lib/libpopt.so.0) error: execution of %post scriptlet from gnome-utils2-2.0.4.0.200209080026-0.snap.ximian.1 failed, exit status 1 -- ~=~=~=~=~=~=~=~=~=~=~=~=~=~= sachin(a)mediaibc.com MediaIBC ~=~=~=~=~=~=~=~=~=~=~=~=~=~= It is more rational to sacrifice one life than six. -- Spock, "The Galileo Seven", stardate 2822.3 ~=~=~=~=~=~=~=~=~=~=~=~=~=~=

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[ot] movie tonight
by q u a s i 25 Sep '02

25 Sep '02

tonight HBO 2315hrs : Pirates of the Silicon Valley. About Steve Jobs & Bill Gates.

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Linuxers September 2002