Custom kali shell

A minimal yet feature-rich Unix-like shell written in C — inspired by Kali Linux workflows.
It supports common shell features such as command execution, pipelines, redirection, aliases, and job control, all wrapped in a lightweight interactive shell environment.

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🌟 Features

• ✅ Command Execution — Runs standard commands using $PATH.
• 🔄 Pipes (|) — Chain commands with output-to-input piping.
• 📂 Redirection
  • >: Redirect stdout to a file (overwrite)
  • >>: Append stdout to a file
  • <: Redirect stdin from a file
• 🧠 Built-in Commands
  • cd, exit, help, alias, unalias, history, jobs, fg, bg
• 📜 Alias System
  • Define aliases in ~/.kali_shellrc with:

    alias ll='ls -la'

• 🧠 Command History
  • Automatically saves history to .kali_shell_history
  • Integrated with GNU Readline
• ⚡ Tab Completion
  • Smart auto-completion for built-in commands and executables in PATH
• 🛠️ Job Control
  • Supports background tasks (&) and notifications when they complete
• 🎨 Configurable Prompt
  • Prompt rendering is customizable through internal config

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📁 File Structure

kali_shell/
├── include/ # Header files (parser.h, executor.h, utils.h, etc.)
├── src/ # Source files
│ ├── main.c # Shell entry point
│ ├── parser.c # Input parsing and command struct creation
│ ├── executor.c # Handles execution logic, redirection, pipelines
│ ├── builtins.c # Implements built-in commands
│ ├── history.c # Read/write shell history
│ ├── config.c # Prompt configuration and aliases
│ ├── prompt.c # Custom prompt rendering
│ └── utils.c # Utility helpers like trim_whitespace
├── Makefile # Build script
└── README.md # Project overview

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🚀 Build & Run

🧱 Requirements

• Linux or Unix-based system
• GCC compiler
• libreadline-dev installed

🔧 Build

make

▶️ Run

./kali_shell

🛠 Sample .kali_shellrc File

Place this file in your home directory (~/.kali_shellrc) to load custom aliases on startup:

alias ll='ls -la'
alias gs='git status'
alias ..='cd ..'

❓Example Usage

kali_shell> echo hello > out.txt
kali_shell> cat < out.txt | grep h
hello
kali_shell> alias hi='echo hello world'
kali_shell> hi
hello world

🧠 Why This Shell?

This project was created as a custom Linux terminal emulator focused on simplicity and extendability, especially for penetration testing workflows (e.g., quickly running recon commands). It serves as a solid foundation for scripting, automation, or building more advanced interactive tools.

📜 License

This project is licensed under the MIT License.

🙌 Credits

Fully built by me, ANONYMOUSx46 Developed using C11 and GNU Readline Inspired by Unix shell behavior and the Kali Linux environment