Unix System Programs

Assignment by Bhagyashree Pandit (UNIX Dec 2013 batch)

Q : Why did you do this programs?
Bhagyashree : As UNIX was in the syllabus of my last semester, Theory as well as University practical. So, sir (Dr Vijay Gokhale) told in class to refer Advanced Programming in the UNIX Environment – By W. Richard Stevens (now referred as book), as it gives the practical idea of “The Design of the UNIX Operating System by Maurice J. Bach”.
So when I start reading this book, first I solved the practical assignments with the help of this book, after that sir told me to do programs given in this book, so I started solving the same and I finished the last chapter of the book last month only.

Q : How it helped you to understand UNIX operating system ?
Bhagyashree : Well, it’s worth in many ways. First, if you know UNIX, you can understand many other operating systems since UNIX seems to be as the base (or Mother ) of most operating systems (for eg: OSX ) and secondly, many servers runs on UNIX. Also, it is fun knowing stuff most people never heard of. It can never hurt to learn as much as your interest is peaked, since I am still a student.

Most importantly you realize ‘why’ we are doing the things inside the operating system as the way we are doing. While reading operating system algorithms in Bach, it always remains back of the mind that we have to provide ‘such and such’ system call to the application programmer using which application programmer is going to write his application.

And if application programmer is to get that built in behaviour via system call then operating system has to implement it. To implement that behaviour, all this is going on. That’s how the logical chain proceeds. That means as an application programmer, I just call a fork() to create a new process. While learning allocreg, attachreg etc. I keep that in mind.

Programs are uploaded here

5 Sep. 2014
12:00 AM

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Lets change with time

[ For My Present/Past/Future Students Only ]

Hello Students,
Straight from my shoulders, I am going to bang on the target directly.

Here is that Bang :

What?
I am planning to change the course structure of our June-to-December curriculum to add the newest advancement in Microsoft Windows Development, that is — WinRT. This is to include new style of Desktop apps, called “Metro/Store Apps” along with their painless porting to Microsoft Windows Tablets, Surfaces and Mobiles.

When?
June 2014 to December 2014; Monday/Tuesday/Wednesday; 8.30 PM to 10.30 PM

Where?
Anandashram ( Next to NMV School, Bajirao Road, Near ABC Chowk, Pune ).

Which?

  • Win32 :
    • Event Driven Architecture ( Hello Windows )
    • DLL
    • Using needed Win32 Command Line Developer Tools
  • COM :
    • Basics,
    • DLL ClassFactory Server/Client,
    • Containment ( Philosophy only ),
    • Aggregation Server/Client ( if possible ),
    • DLL Automation Server/Client,
    • Using needed COM related Command Line Developer Tools
  • WinRT :
    • Basics ( Hello WinRT ), Under The Hood,
    • C++11 & C++/CX ( As Needed ),
    • XAML Syntax ( Whenever Needed Only ),
    • Asynchronous Programming,
    • WinRT Component,
    • Using Windows Runtime Library
    • Interoperability
    • Porting to Windows Phone 8
    • Using needed WinRT Command Line Developer Tools
  • IDE :
    • Microsoft Visual Studio 2012/2013 on Windows 8.x

Wealth?
Rs. 10,000/- ( Rupees Ten Thousand Only )

NOTE :

It has been the tradition of the class since it’s inception that class fee is decided with the consent of the students. This is for the first time, I am declaring the panel of those students with their opinions Consolidated Replies about fees, who participated in the discussion process. After going through the student’s opinions, I chose to go for less than the average.

Some may find above announcement ‘well enough’. But for those who want to know “Why”,may continue from here ___

IF  INTERESTED  ONLY :

Why?

Why I want to stop teaching .net framework architecture ?

I have been teaching Win32, COM and .NET Framework, for this particular period of June-to-December, either in full-length mode ( 6 months each ) or in partial mode ( 2 + 3 + 1 = 6 months, all-in-one ), since the year 2002, which is a considerably long duration.

As any doctor has to go to the root of the disease to treat a patient, same applies to any other professions and therefore, for computer developers too.

I have always felt very sorry for our “most Indian IT-developer mentality” of choosing the EASY than choosing the RIGHT. They only give a very infamous argument, the so called “The Deadline”, to hide their incompetence. Currently very few have just heard about Win32 and many even don’t know ( or they do not want to know ) about COM and say that Win32 and COM are outdated. Are they really?

I have only one line to say about Win32 ( and that is enough ) : Win32 is the “only” doorway to enter the Windows OS. Thats it. Period.

COM is “the technology” which shoulders the burden of ‘being the key underlying and essential technology’ for the existence other mighty technologies/softwares such as :-

  • – All DirectX Technologies
  • – All the MS Office Applications
  • – Media Player
  • – Movie Maker
  • – IIS, Internet Explorer
  • – Windows Explorer, Windows Shell Extensions
  • – MTS, Speech, Telephony, Messaging, Audio/Video Streaming
  • – and many many more ( many are yet unknown to me )

.Net Lovers/Developers/labours, please hold your breath : CLR is itself written in Win32 and COM ( Don Box ).

In short Win32 and COM are so basic ( and hence many say it is so advanced ) that they are must for every aspiring Windows Developer.

This fact compelled me to study “the basics” and therefore obviously I followed the long way.

In Object Oriented Principles, every abstraction is made for “rapid development” but not for the “core development”.In other words, if you know the “core development”, then and then only you can go for the “rapid development”. Much in the same manner as any IDE is made for those who can manage the things without the IDE from the “command line”, but now want to go rapidly to save the time using IDE.

Today how many of us know each and every command that gets executed when we press any button in an IDE? We just don’t know. In my quite long and painful teaching experience, very few working individuals knew that cl.exe is the C/CPP compiler for Visual C++ IDE. That is why I first started learning and then teaching Win32 and COM.

I teach Win32, because, in my experience no other development philosophy can teach event mechanism, message loop, event handlers and callback mechanism, as elegantly as Win32,not even Cocoa, Java and .Net. Rather they say “message Loop is there but you don’t need to know it”. Actually speaking, the message loop is the Heart of any Window-based application ( Charles Petzold/Jeff Prosise ). How could any genuine developers live without knowing it?It is as absurd as imagining “a doctor who does not know anything about Heart” and as you know, first of all, I am a Doctor.

[ NOTE : In reality, learning above concepts is possible using XWindows/Xlib in Unix/Linux.But it is far easier and intuitive to learn them in Win32. Many will agree with me. ]

I teach COM, because, first, I love it; second, that was the technology I used in my first real-world project (API/SAPI/TAPI /DirectX ) and third, after facing complexity of COM ( as everybody says COM is difficult ), facing other complexities is NOTHING. My past COM students might recall the days of Aggregation /Automation /Marshalling.

The reason I was teaching .Net framework architecture ( without syntax ) was that the CLR itself is written Win32 and COM foundations ( Don Box ). Learning .Net is to apply the philosophy of ‘binary contract’ given by COM. Though I like philosophy of .Net framework,I personally never liked somebody to collect my garbage if I still have my hands and feet working well. So although I love “CLR Via C#” by Richter and “Advanced .Net Debugging” by Mario very much, I don’t like managed world as my area of development. It may be due to my inherent nature to live in ‘unsafe real world’ rather than in ‘verifiably type-safe matrix’.

Why am I switching myself to teach WinRT?
As per my reading, .Net is geared mainly towards WEB and not for the domains where “speed does matter” like System programming, fast/fluid/immersive/responsive UI, Graphics or DirectX and many more.

Therefore, there had been a prolonged demand for the Native Development Environment which has now been fulfilled by the Microsoft’s mobile technologies, better known as ‘WinRT’. And Microsoft once again has put its faith in its legendary, immortal, showstopper methodology i.e. ‘COM’ to build ‘WinRT’.

To quote straight from the horse’s mouth, ‘Everything old, comes back as gold’.

Surprisingly almost every article/video/book about WinRT, repeatedly convince their audience, that it is NATIVE and it is COM. Microsoft needed to shout “native, native and native” so loudly because of failure of .Net based WPF ( Reference : MSDN Channel 9 videos ). They also mention it very promptly that COM for WinRT is easier than legacy COM, though conceptually both are similar.

Finally, for many days I wanted to teach some technology which has many real-world applications of COM and yet it is easy to deliver to all sorts of students ( Teaching DirectX to everyone is difficult ) who are ready to embrace it with the breadth of Win32 and the depth of COM.

[
Oh Sorry, I forgot to mention that an “able” WinRT programmer, single handedly and independently, can deploy his/her Metro/Store Apps on Windows Store and can earn a lot of money by working from home.AFTER ALL, AT THE END OF THE DAY, EVERYTHING COMES TO MONEY !!!
]

1 Jan. 2014
4:00 PM

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Invitation by Wen-mei Hwu

Invitation to Gokhale sir by Dr. Wen-mei Hwu to assist coursera cuda heterogeneous/GPU parallel computing.

Wen-mei W. Hwu is the Walter J. (“Jerry”) Sanders III-Advanced Micro Devices Endowed Chair in Electrical and Computer Engineering in the Coordinated Science Laboratory of the University of Illinois at Urbana-Champaign. Dr. Hwu received his Ph.D. degree in Computer Science from the University of California, Berkeley, 1987.
From 1997 to 1999, Prof. Hwu served as chairman of the Computer Engineering Program at the University of Illinois. In 2007 he introduced a new engineering course in massively parallel processing, which he co-taught with David Kirk, Chief Scientist of NVIDIA. In 2008, he was named co-director of one of two Universal Parallel Computing Research Centers sponsored by Microsoft and Intel.

Invitation by Wen-mei Hwu

Invitation by Wen-mei Hwu

3 Dec. 2013
3:30 PM

Achievement : The Adobe Certified Expert

Hello Students ,
After Apple Final Cut Master Pro and Parallel Programming (Coursera) certification, recently I (Dr. Vijay D. Gokhale) Successfully completed certification of “Adobe Certified Expert for Premiere Pro CS6“.
I am so excited even after 11 certifications, since it was tremendously difficult. Yes, even much much more difficult than all Apple certification. Apple never sent such a mail that you can see in this attachment, appreciating the certified person. Apple’s mails were all of official format. As usual, I am more willing to share this to all of students.

Certificate-Mail-By-Adobe

Certificate-Mail-By-Adobe

Regards,
Dr. Vijay D. Gokhale

14 Nov. 2013
11:54 AM

|| गुरु खरा तोची जाणावा ||

गुरु कसा असावा?
असा प्रश्न विचारण्यात आला.
काय द्यावे उत्तर हेच कोण उमजे ना.

गुरु कुठला असावा?
असा प्रश्न विचारण्यात आला.
काय करू देवा वाचा कोणाचीच फुटेना.

मग एके दिवशी भेटली एक व्यक्ती,
आणि मग सुचली एक युक्ती.
गुरु म्हणजे ज्ञानाचा झरा.
गुरु म्हणजे आसमंत सारा.
गुरु उन्हात सावली.
गुरु साक्षात माउली.

संस्काराचा पाया आई घरात उभारी,
तोच करी भक्कम गुरु ज्ञानाच्या द्वारी.

आई आपल्या देते दाणा हा टिपायला,
म्हणे दाणा देयील बळ उद्या आकाशात उडायला.

गुरु हेच तर करी,फरक करू नका काही.
मग गुरूंनाच आपण आई का म्हणू नाही?

गुरु म्हणजे आरसा असावा , खरं तेच सांगणारा,
गुरु म्हणजे देव मानवा, जनास आवडणारा .

गुरु म्हणजे माणूस जाणावा हाडा मांसाचा,
माणसातल्या देवाशीच गुंफण घालणारा .

मी पाहिलंय मझ्या गुरूंना प्राण पणान शिकवताना,
हसत मुखाने सहन करतात ते खूप मूक यातना.

ठेवा थोडी जाण त्या महान माणसाची,
जो काळजी करत नाही त्या कपाळावरच्या दवबिंदू पुसण्याची,

गुरु समवेत वसते सरस्वती ठायी ठायी,
अर्पिते ह्या ओळी फक्त आपल्या सरांच्या पायीं.

—
सोनल सुनील सालकाडे.

4 Jan. 2012
5:59 PM

Inevitable Consequences of Admission Process

From : Somebody (Sir does not want to disclose the name).
date : Sat, Dec 10, 2011 at 8:12 PM
subject : “AstroMediComp Contact: WORST MANAGEMENT”

Message:
 Respected Gokhale Sir,
I don’t know you will see this or not but i am sorry to say that this
time i have seen one of the worst management skills from your side.
The people who are managing UNIX Admissions showed the worst attitude
they can. Whenever you do something do it right it is something i
learned from you only.Well i don’t think this all stuff is good enough
now. I don’t like people with priorities its the same as doing
partiality.

————————————————————————————————————————————————

A note from website administrators and admission controllers (NOT FROM GOKHALE SIR !!!)
The above written mail was sent to Dr. Vijay Gokhale sir after day II of admissions (10-Dec-2011) by an IT professional aspirant who couldn’t get admission (we won’t dare to call him student !!! … students certainly DO NOT talk/write in this manner !!!). We strongly believe that a Vidyarthi as defined in Sanskrit is “Yad Vidya, Arhate Iti Vidyarthi (a student is someone who aspires for knowledge (not for admission to any particular tuition))”.
All we are sensitive about is unfair rejection of genuine and deserving students. Above e-mail forced us to rethink on the conventional policies, using which we have been fairly doing admissions for years. This e-mail panicked us to change the policies on 11th hour which created a tiny wave of confusion and dissatisfaction among the real genuine students. And some such students couldn’t get admission due to the changed policies. We owe them a very very very sincere apology. Here we would like to clarify that the policies were changed only only and only to give a fair chance of admission to all.Thank you all the genuine students who trusted in our noble motives, showed great sportsmanship and accepted their repudiation …. Gokhale sir still loves you a lot !!!

Here Gokhale sir has something to say to above e-mail writer and to all those people who think alike.
– Website administrators and admission controllers

————————————————————————————————————————————————

— On Sun, 12/11/11, DR.VIJAY GOKHALE wrote:

> From: DR.VIJAY GOKHALE
> Subject: Re :AstroMediComp Contact: WORST MANAGEMENT
> To: Mr. Somebody (to the one who sent mail, we are not disclosing name)
> Date: Sunday, December 11, 2011, 5:00 AM
Date: Sunday, December 11, 2011, 5:00 AM
Hello Mr Somebody

Let me tell you , https://astromedicomp.org/ is the site  started and  maintained by my students. Even I myself refused its  membership. Obviously  your mail first received by Shrenik Vikam ( Admin of the site ) and he  forwarded it to me. Its 1-30 AM ( late night 25-30 ). I am  replying you.

First thing first. I will not thank you for bringing “said  injustice” to  my attention — “BY EMAIL”. I don’t like this “IT”way.  I am  a believer of  Person-To-Person and Eye-To-Eye contact. So please,  come  forward. Prove  your allegation. You have nothing to loose neither to  fear from.
By the way ___ Are you my student? ( line in your mail “learned from  you”  is misguiding )  If yes, then why didn’t you directly  mailed/called/meet me?  My student  might have done that before writing directly something  like this. Alright,  Still its never too late. Come today ( its sunday so  probably you will have holiday ) at 9-30 PM to meet me in  the class. If your allegations are true,  action will be taken immediately in your presence and  with  presence of all others.  If you are not my student, then you don’t know me nor  my  philosophy nor  my student’s attitude. If they are rude, then yes,  that is  due to me.  I am a very orthodox, rude, shrewd, impractical  teacher and  all my students  ( from Class/DAC/WiMC/DiVESD/DACA ) know that very  well and  also bear me  very well up till now.

Many times I myself prioritise things using my own  rights  to those who  prove worthy of that priority ( not partiality ). For  Example, out of crying twins, mother chooses one to  feed,  keeping other one to wait for a  while. I don’t think someone will call that mother  “partial”. I myself, being a teacher ( who is considered  third, after mother and father ) have  rights to choose who should be admitted and who should  not.  As my class  runs with — no computers, no banners, no boards, no  advertisements,  no guarantees, no warranties, no syllabus  considerations,  no promises,  no welcomes and with “student decided” fees without  any  receipts, I do  have all those rights with me. These things are OPEN  TO ALL. KNOWN TO ALL. NEVER HIDDEN. Just like Bachchan said in Agneepath,  “Main  Kala Dhanda Bhi Andhere Mein Nahi Karata”.
NOTE : By the way, using these rights, I am going to  choose  some extra  admissions on my own for those who proved  themselves worthy of it. As like for every batch, these admissions will be free of costs.

*** Somebody, do you think this is  partiality?  oh yes, it is. If you met me before ( just like them ), you might be part of this quota/partiality after  proving worthy of it. If you don’t know this, then its sure that you are  not my student. Because every batch has this quota/partiality.

If you are not my student, then you loose all above details. My class always begins with first 3 days about “WHO SHOULD NOT  ATTEND MY CLASS”.  Many of my students have audio recordings of those 3  days.  After listening  or knowing their contents, you may found that  whatever  happened was good  and you got saved from wasting your precious money  and  time. you may also  found that my class may not be a proper place for  great  soul like you. So please, I request you, do not attend my classes  ever. My class may not be worthy of your presence. Actually I  am  disappointed by that person who  recommended my class for you.  My students are my pride and they make me proud. I  have  blind faith for  them. If you are my student, obviously you are one of  them.  Do you know,  Once I told one of my relative that I don’t need  “your”  support for my coffin as I do have my students to do that. Do you know this?  My students do.

If your allegation gets proved, then all efforts taken  by  me up till now are just wasted and there remains no reason for  building/cultivating the morals henceforth. So please  come  forward to prove this failure. Prove  your allegation. You have nothing to loose neither to  fear  from.

PS: Are you surprised to see how one can write so  “lengthy”  email, at so late night, when recipient himself ( means you )
may  be under sweet, deep sleep? Are you really my student?

Still …..
God bless you.
Dr. Gokhale Sir.

12 Dec. 2011
9:55 AM

Article about Sir

Pune Parichay is carrying an article about Gokhle Sir. Click here for the full article.

आयुष्यातील अनेकविध वाटा वळणांवर परिचयात आलेली काही व्यक्तीमत्व अशी असतात की त्यांच्यामध्ये कर्तुत्व, जिद्द, मेहनत, आत्मविश्वास, उतकृष्ट नियोजन या सर्व गुणग्राहकतेमुळे त्यांच्यापुढे नतमस्तक व्हावेसे वाटते. ‘इच्छा तेथे मार्ग’ हे प्रत्यक्ष कृतीत उतरवणारे असेच एक आगळे वेगळे आणि आदर्श शिक्षक म्हणजे पुण्यातील डॉ. विजय गोखले. शिक्षकाने कसे असावे व विद्यार्थीवर्गाने खरे मार्गदर्शक म्हणुन कोणाला निवडावे याचे अचूक म्हणजेही गोखले सर…

2 Mar. 2011
2:34 PM

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