lakshminarayanannn / skerl

A basic, yet a powerful implementation of shell in C for unix/linux systems

skerl

In this project we have developed a basic, yet powerful shell --skerl for the unix/linux systems.

Getting Started

These instructions will get you a copy of the project and ready for use on your local unix/linux machine.

Prerequisites

The shell developed is target for unix/linux systems only.

Quick Access

• Click on the link to download skerl - skerl.zip

• Extract the zip folder

Release

• You can download the latest release of skerl from here.

Developer Style

• GNU GCC complier

• Clone this repository using the command:

    git clone https://github.com/KrishnanSG/skerl.git
    cd skerl
  

• Complie and create executable

    gcc skerl.c -o skerl.out
  

How to Use

You're almost there. The following steps will guide you on how to get start with skerl.

1. Open your favourite terminal
2. Starting skerl shell

        ./skerl.out
   

3. Enjoy skerl 😀.

You may use the help command to get help regarding the shell

What can skerl do?

• Parse and tokenize the given command
• Execute any given program
• Maintains history of all commands for quick access
• Input redirection

eg: /home/user$ wc -l < story.txt

• Output redirection

eg: /home/user$ ls > out.txt
/home/user$ ls >> out.txt	// append mode

• Pipes

eg: /home/user$ cat story.txt | wc -l 

• Execute process in background when suffixed with (&)

eg: /home/user$ program.o -arg1 -arg2 &

• Provides stats on usage of shell. Try out the following internal commands.

globalusage
averageusage

How does this work?

This is a really interesting section as developer you would love to visit. Keeping this in mind we have provide a pretty detailed explaination.

The report we have created contains:

• What is a shell?
• Lifetime of a shell
• Internal vs External commands
• Implementation of skerl
• Working of skerl
• Conclusion

Authors

• Krishnan S G - @KrishnanSG
• Sadham Hussain - @Sadham-Hussian