Exsh — A Custom Unix Shell in C

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Welcome to Exsh, A Unix like shell written in pure C. This project mimics the core behavior of Unix shells — covering command parsing, pipes, input/output redirection, process creation with fork(), and execution using execvp().

🔬 Designed for learning, OS-level process management, and understanding how real shells like Bash work.

🌟 Features

Shell Feature	Exsh Implementation
Interactive Prompt	Tracks command histroy, <C-r> search and cursor control
Command Execution	Runs system commands with arguments
Pipes	Connects output of one command to input of another
Input/Output Redirection (>, >>, <)	Redirects stdin/stdout to files
Built-in Commands	cd, exit
Process Management	fork(), execvp(), wait() for process control

🚀 Getting Started

Requirements

• libc
• gcc
• make
• libreadline (optional)
• Unix based OS

🔧 Build

cd exsh/src
make
./exsh

📚 Usage Examples

$ ls -l
$ cd folder
$ ls | grep txt > out.txt
$ exit

Exsh Architecture

Readmore here: Exsh Blog

🤝 Contributing

We ❤️ contributors!

To contribute:

1. Fork the repository.
2. Clone it locally:

   git clone [repo]
   cd exsh/src
   git checkout -b feature/my-improvement

License

@Meerthika