Linuxers November 2001

linuxers@mm.ilug-bom.org.in

69 participants
112 discussions

Unix Baby Command Man Page
by Bhushan Tiwari 10 Nov '01

10 Nov '01

BABY(1) USER COMMANDS BABY(1) NAME baby - create new process from two parents SYNOPSIS baby -sex m|f [ -name name ] DESCRIPTION Baby is initiated when one parent process polls another server process through a socket connection in the BSD version or through pipes in the System V implementation. Baby runs at a low priority for approximately forty weeks and then terminates with a heavy system load. Most systems require constant monitoring when baby reaches its final stages of execution. Older implementations of baby did not require both initiating processes to be present at the time of completion. In those versions, the initiating process which was not present was awakened and notified of the results upon completion. It has since been determined that the presence of both parent processes results in generally lower system loads at the completion, and thus current versions of baby expect both parent processes to be active during the final stages. Successful completion of baby(1) results in the creation and naming of a new process. Parent processes then broadcast messages to all other processes, local and remote, informing them of their new status. OPTIONS -sex............define the gender of the created process -name.........assign the name name to the new process EXAMPLES % baby -sex f -name Jacqueline % completed successfully on July 9, 1992 at 9:11PM % vital statistics: 8 pounds 3oz, 20 inches, dark hair % The parent process, Kim Dunbar, is reportedly doing fine SEE ALSO cigar(6),dump(5),cry(3) BUGS Despite its complexity, baby only knows one signal, SIGCHLD, (or SIGCLD in the System V implementation), which it uses to contact the parent processes. One or both parent processes must then inspect the baby process to determine the signal's cause. The sleep command may not work as expected on either parent process for some time afterward, as each new instance of baby sends intermittent signals to the parent processes which must be handled by the parents immediately. A baby process will frequently dump core, requiring either or both parent processes to clean up after it. Despite the reams of available documentation on invoking and maintaining baby, most parent processes are overwhelmed. BABY BUG REPORT: Mr. Dunbar distributed the man pages for baby(1) this morning. I wish to confirm some known bugs, give possible solutions, and to warn him of several undocumented bugs. We have also experienced the following undesirable behavior (as documented in the man pages) following the use of the baby(1) command using the syntax shown below: baby -sex f -name Beth (in 1989) baby -sex m -name Daniel (in 1991) For the first 1.552e+07 seconds after the child process was started, neither parent process was able to execute the sleep command when the argument exceeded 600. While this bug was noted in the baby man page, the man page clearly states that the child process will only send SIGCHLD signals. Experience demonstrated that the child process sent SIGURG signals as well as SIGCHLD signals, even though the conditions requiring urgent processind did not exist with the child process. Extensive research indicated that most signals were generally related to an I/O problem with the child process. In almost all cases, the signals indicated the child process either required input, or the output bin was full. In the case of the output bin full, the condition can be easily detected with the diapercheck(1) command using the -smell qualifier. However, in some cases, the child process continued to send the SIGURG signals for unknown reasons after the I/O problem was rectified. In these cases the kill(1) command was considered as a possible alternative, but was considered unacceptable by the system administrator. Additionally, we found that the first child process (-name Beth) began executing whine(2) continuously for no apparent reason beginning 1.5 years after the process startup. This condition appears to be ongoing even though the process has been running for 3.5 years. Unfortunately, it appears that this bug is getting steadily worse. The condition surrounding the bug is still being investigated, and no solution has been discovered to date. ******************************************************************** Anyone w/out a Sense of Humor Is At The Mercy of The Rest of Us. :-) ******************************************************************** Bhushan Tiwari _________________________________________________________ Do You Yahoo!? Get your free @yahoo.com address at http://mail.yahoo.com

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[OT] Balancing of the AVL trees
by Kinjal Sonpal 10 Nov '01

10 Nov '01

Dear all !! I'm here with one more problem. This might not be toatlly related to Linux (other than myself using gcc on Linux), but I'm a bit confused with this problem. So plz help. The question : While balancing a disturbed AVL tree, we normally adapt the bottom-up approach (This is the only approach, I guess), ie, we start by balancing the lowermost subtree in the tree and go on to balance the very next upper tree. Now, my questions is that, is it okay to rebalance an already balanced subtree in order to achieve proper balance of it's parent tree? In other words, if the balance of a subtree is within the aceptable limits, can we still rearrange the tree? Hope ppl on the list won't mind this OT question. Thanks a lot in advance. Regs, Kinjal Sonpal

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System Crash
by Q u a s i 09 Nov '01

09 Nov '01

Folks, I tried to mount a multi-session disk made with Nero and the Box Crashed... I had to use reset. I am running Debian (unstable). quasi _________________________________________________________ Do You Yahoo!? Get your free @yahoo.com address at http://mail.yahoo.com

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(no subject)
by Vishwanath V 09 Nov '01

09 Nov '01

Hi guys, I got my cable net connection yesterday. The client spftware used by my cable wala is cyberoam client. i found out one for linux. But it says authentication failure check username and password...... I have made appropriate changes in the conf files. Any body knows how to make cyberoam client work on windows ......... ___________________________________________________________________ *NEW* Yahoo! Messenger for SMS. Now on your Celforce phone *NEW* Visit http://in.mobile.yahoo.com/smsmgr_signin.html

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Re: [ILUG-BOM] To be a part of the game you have to play game
by nici bhatt 09 Nov '01

09 Nov '01

hi i do appreciate your prompt reply about this mail but you didnt pick my word I am well aware about SAMBA but things which I am looking for is just install one protocol and u r through. You dont have to configure any thing. You tell me how much configuration is involved in getting SAMBA up I know it. how can you aspect one dum user of windows network to do all this configuration. So I am in search of one protocol which will help me to minimize this hard efforts and your desktop is on highway straight-away nici >From: Philip S Tellis <philip.tellis(a)iname.com> >Reply-To: linuxers(a)mm.ilug-bom.org.in >To: <linuxers(a)mm.ilug-bom.org.in> >Subject: Re: [ILUG-BOM] To be a part of the game you have to play game >Date: Thu, 8 Nov 2001 18:36:58 +0530 (IST) > >On Thu, 8 Nov 2001, nici bhatt wrote: > > > so first what i am looking for is protocol the way we look entire > > network in win95/win98/w2k that is uses netbui protocol if you > > remove this and you will see nothing so is there anybody who can > > contribute to this development on linux where by you can easily plug > > your desktop in this kind of protocol and look around full network. > >It's called SaMBa, and there's a client called Linneighbourhood that >acts like network neighbourhood in windows. Allows you to brows the >entire windows network, as well as other samba servers. Needs a little >more work though. > > > > i know this will not help much because your file system will be > > different so it's of no help but still this can help us to the > > protocol level where all services talking to each other in windows > > network and you have that, then your work is much simple to push the > > desktop in this kind of network. We can work out at file system > > level at second stage. > >It has nothing to do with your filesystem. Over the network, there is >no filesystem. Samba takes care of everything. > >Philip > >-- >Television -- teacher, mother, secret lover! > > -- Homer Simpson > Treehouse of Horror V > > >Visit my webpage at http://www.ncst.ernet.in/~philip/ >Read my writings at http://www.ncst.ernet.in/~philip/writings/ > > MSN philiptellis Yahoo! philiptellis > AIM philiptellis ICQ 129711328 > >_______________________________________________ > >http://mm.ilug-bom.org.in/mailman/listinfo/linuxers > _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp

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Using Win2000 Boot Loader.
by Abhishek Gupta 09 Nov '01

09 Nov '01

Hi there, Just wanted to ask about how do we boot linux using the windows 2000 boot loader. One way is mentioned in the linuxdocs that we extract first 512 bytes using dd= .... command, and copy this image to the windows drive , adding it to the boot.ini. but this doesnt work et al. So if anyone pl. can help on this..... Regards, Abhishek Gupta.

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Using Win2000 Boot Loader.
by Abhishek Gupta 09 Nov '01

09 Nov '01

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Re: [ILUG-BOM] Wat abt our Linux in Schools/Colleges initiative
by Bhushan Tiwari 09 Nov '01

09 Nov '01

I suggest is, we can have a big Workshop/Seminar of one full day. Our volunteers will visit different colleges and invite students and also professors for the workshop. Volunteers will give a brief Linux introduction at the colleges and invite them for advanced topics ( Custom Distro, Programming, Linux Localization, Server Setups etc..) at the Seminar. Having seminars at different colleges is very time consuming, we can at the most have only 2-3 seminars a month, by the time we reach 6-7 colleges, their regular exams will be getting started and also with the number of volunteers we have, reaching 6 colleges in 2 months is a big task. The Seminar/Workshop can be held at any college auditorium, or may be at HBCSE. When I had taken a lecture on Linux at Patkar college, Goregaon, students there were more keen to know the alternatives to MS Applications and how could they implement it. Giving them a customised distro wouldn't be helpfull if they don't even know the applications available in Linux. I support the development of customised Distro, instead we can involve interested students from colleges in this process who in turn will be promoting it in their respective circles. Having a common seminar for everyone will help us present in a better way. There won't be a time barrier as when doing at colleges. This way we can target large and interested audience. We can invite private institutions also and can have sponsors for the seminar. Some volunteers can go to commercial organisations for sponsorship. Bhushan Tiwari _________________________________________________________ Do You Yahoo!? Get your free @yahoo.com address at http://mail.yahoo.com

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Cable net client for LINUX
by Vishwanath V 09 Nov '01

09 Nov '01

Hi guys, I got my cable net connection yesterday. The client spftware used by my cable wala is cyberoam client. i found out one for linux. http://sourceforge.net/projects/cyberoam/ But it says authentication failure check username and password...... I have made appropriate changes in the conf files. Any body knows how to make cyberoam client work on Linux......... ___________________________________________________________________ *NEW* Yahoo! Messenger for SMS. Now on your Celforce phone *NEW* Visit http://in.mobile.yahoo.com/smsmgr_signin.html

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To be a part of the game you have to play game
by nici bhatt 09 Nov '01

09 Nov '01

Hi my subject make's it more clear what my intension is. and that is if you want to push linux as major desktop os then you have to play the game the way your competitor play. so first what i am looking for is protocol the way we look entire network in win95/win98/w2k that is uses netbui protocol if you remove this and you will see nothing so is there anybody who can contribute to this development on linux where by you can easily plug your desktop in this kind of protocol and look around full network. i know this will not help much because your file system will be different so it's of no help but still this can help us to the protocol level where all services talking to each other in windows network and you have that, then your work is much simple to push the desktop in this kind of network. We can work out at file system level at second stage. So is there anyone who can contribute to protocol level development or some one interested in such idiot work I know this sounds like crazy idea but some how I faced this problem and I want to overcome this. So anybody there..? nici _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp

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Linuxers November 2001