Welcome to SWE2024 - SKKUcsi.skku.edu/wp-content/uploads/0_introduction-2.pdf · 2019-09-04 · Text editor –Vim (2) §Vim has 6 modes •Normal mode •Insert mode •Visual mode

Welcome to SWE2024System Programming Lab

Prof. Euiseong SeoTA – Hyeonsu Lee ([email protected])

TA – Seungmin Oh ([email protected])Computer System Laboratory

Sungkyunkwan Universityhttp://csi.skku.edu

2SWE2024: System Programming Lab | Fall 2019 | Euiseong Seo

Introduction§ Schedule

• 18:00 – 21:45 (Wednesday)• Lecture room: #21514 (Engineering Building)

§ Announcement & Assignment submission• We will use http://csi.skku.edu/course/swe2024-43/

for this lecture.• We will use Icampus to submit the programming

assignments.

http://csi.skku.edu/course/swe2024-43/


About TA§ Donggyu Choi / Jongseok Kim

• TA of this class• Computer System Laboratory• Office : 산학협력센터 #85533 (5th floor)• Email : Hyeonsu Lee à [email protected]

Seungmin Oh à [email protected]• We prefer email, don’t send icampus note.• Please add “[SWE2024]” in the title.

(It is difficult to find student’s emails in our mail box.)


Course Outline (1)

Operating System (Kernel)

System Call Interface

CPU MEM I/O DevicesHardware

KernelSpace

UserSpace

cd ls vi wget


Course Outline (2)

§ Why we use Linux?• Used in many scientific and industrial settings• Internet servers and services run on Linux• It’s free!

§ How to use Linux?§ How to make [advanced] programs on Linux?

• We will learn various system calls provided by Linux systems


Course Outline (3)§ Very basic Linux commands

• Shell, text editor, compiler

§ Basic Linux system calls• File I/O, Process management• Inter-Process Communication (IPC)

§ Network programming• Sockets

§ Concurrent programming• Processes, Threads


Reference§ Computer Systems: A Programmer’s Perspective

• Randal E. Bryant and David R. O’Hallaron,Third Edition,Pearson Education Inc.2015.

• http://csapp.cs.cmu.edu

http://csapp.cs.cmu.edu/


Class Policies (1)§ Grading Policy

• Class attendance (10%)• 3 Programming assignments (15 + 15 + 20 à 50%)• Final Exam (40%)

§ There will be no midterm exam.


Class Policies (2)§ Cheating Policy (Important)

• What is cheating?– Copying another student’s solution (or one from the Internet)

and submitting it as your own– Allowing another student to copy your solution

• What is NOT cheating?– Helping others use systems or tools– Helping others with high-level design issues– Helping others debug their code

• Penalty for cheating:– Severe penalty on the grade and report to dept. chair

• Ask helps to us if you experience any difficulty!


Any Questions?

Coding in Linux

Prof. Euiseong SeoTA – Hyeonsu Lee ([email protected])

TA – Seungmin Oh ([email protected])Computer System Laboratory

Sungkyunkwan Universityhttp://csi.skku.edu


Contents§ Coding standard

§ Debugging tool

§ Text editor


Coding standard (1)§ A rule for writing a source code

§ Pros• Specify a common format

for the source code and comments• Allows developers to easily share code.• Looks better!

§ Cons• It’s bothering


Coding standard (2)§ There are many coding standards§ The most important thing is consistency

§ You can use “Linux kernel coding style”• Korean : https://wiki.kldp.org/wiki.php/LinuxKernelCodingStyle

• English : https://www.kernel.org/doc/Documentation/process/coding-style.rst

§ But, we think 4 spaces is good.

https://wiki.kldp.org/wiki.php/LinuxKernelCodingStyle

https://www.kernel.org/doc/Documentation/process/coding-style.rst


Debugging tool (1)§ Still use “printf”?

• In multithread program?

• You have to compile the source code every time• How about “segmentation fault”?

§ GDB• Debugging tool for GNU project• $ sudo apt-get install gdb• Compiler option ‘-g’ needed• Usage : gdb <Executable File>


Debugging tool (2)§ Commands for GDB

• R : Run program• B [FuncName/FileName:LineNum] : Set breakpoint• P : Print variables• S : Step (Go in to function)• N : Next (Skip function)• C : Continue until gdb meets breakpoint• Bt : Print backtrace of all stack frame

(Use this when segmentation fault occurs)• Q : Quit• H : Help


Text editor – Vim (1)§ Vi & Vim

• Vi is the default editor in all UNIX operating systems • It may be hard to learn, but it is useful• Vi in Linux is usually Vim (Vi Improved)• You can easily install Vim

(maybe there are already installed.)– $ sudo apt-get install vim


Text editor – Vim (2)§ Vim has 6 modes

• Normal mode• Insert mode• Visual mode & select mode• Command-line mode & Ex-mode

§ You can easily change between modes.

Normal mode (default) Insert mode

Command-line mode

For navigation and manipulation of text

For inserting new text.

For entering editor commands

Visual modeFor navigation and manipulation of text selections


Text editor – Vim (3)§ Basic interface

• i, a, o, s : Insert mode• v : Visual mode• h, j, k, l or ( cursor keys ) : Cursor movement• ‘:’ ‘/’ : Command mode• ‘Esc’ : return to normal mode


Text editor – Vim (4)§ Cursor movement in command mode

Up cursork

Down cursorj

Left cursorh

Right cursorl


Text editor – Vim (5)§ Exiting Vim in command-line mode

• To save file– :w (name) – (If the file have been saved, you can omit the name)

• To quit without saving – :q

• To forcefully exit without saving changes– :q!

• To save and exit (recommended)– :wq


Text editor – Vim (7)


Text editor – Vim (8)


Text editor – Vim (9)§ For learning Vim ..

• Vim Adventures (Game)– http://vim-adventures.com/

• Vim Tutorial– http://www.openvim.com/tutorial.html

§ Repeat, repeat, and repeat.

http://vim-adventures.com/

http://www.openvim.com/tutorial.html

Setting Up a Ubuntu VM(or Changing your OS to Ubuntu)


Steps1. Install VirtualBox on your computer

2. Create a virtual machine (VM)

3. Install Ubuntu on the VM

4. Fun


Installing VirtualBox (1)§ Go to VirtualBox website

• https://www.virtualbox.org/

§ Download installation binary

https://www.virtualbox.org/


Installing VirtualBox (2)§ Next, Next, Next, Yes, Install, Yes … Finish!


Installing VirtualBox (3)


Creating a VM (1)§ Include “linux” into your VM name


Creating a VM (2)


Creating a VM (3)


Creating a VM (4)


Creating a VM (5)§ Double Click VM, or Click Start button


Installing Ubuntu on the VM (1)§ Go to

http://www.ubuntu.com/download/desktoporhttp://ftp.daumkakao.com/ubuntu-releases

§ Download a desktop image

http://www.ubuntu.com/download/desktop

http://ftp.daumkakao.com/ubuntu-releases


Installing Ubuntu on the VM (2)§ Select “Ubuntu-18.04.3,,,.iso” file.


Installing Ubuntu on the VM (3)§ Select Korean or English


Installing Ubuntu on the VM (4)§ Just click install, yes, next, continue§ And fill your name(user) and password


Installing Ubuntu on the VM (5)§ Restart,,, and Finish!


Installing Ubuntu on the VM (6)§ Let’s test your VM.§ Press Ctrl + Alt + T to launch a terminal (shell)§ Type the following commands:

$ sudo apt-get update$ sudo apt-get upgrade


Any Questions?

Documents

Welcome to SWE2024 - SKKUcsi.skku.edu/wp-content/uploads/0_introduction-2.pdf · 2019-09-04 · Text editor –Vim (2) §Vim has 6 modes •Normal mode •Insert mode •Visual mode