Custom Unix Shell in C

Overview

Welcome to my custom Unix shell written in C! This shell is designed to provide an advanced command-line environment with features such as symbol tables, word expansion, tilde expansion, and more. Whether you're a Unix veteran or a newcomer, this shell aims to enhance your command-line experience.

Features

This Unix shell project includes the following features:

• Command Execution: Execute basic commands like ls, cd, pwd, exit, and more.

• Job Control: Bring jobs to the foreground with fg, send them to the background with bg, and list current jobs with jobs.

• Built-in Commands: Access a variety of commands built directly into the shell.

• Signal Handling: Handle signals like SIGINT (Ctrl+C) and SIGTSTP (Ctrl+Z) gracefully.

• Custom Prompt: Customize your shell prompt to suit your preferences.

• Symbol Tables: Efficiently manage variables and streamline command parsing using advanced symbol tables.

• Word Expansion: Experience flexible and dynamic command input with powerful word expansion capabilities.

• Tilde Expansion: Seamlessly reference home directories using integrated tilde expansion for convenient shortcuts.

• ...and more: The shell incorporates various advanced concepts to deliver a comprehensive Unix experience.

Building the Project

To build this project, you will need to have make and gcc installed on your system. Once you have these prerequisites, you can build the project by following these steps:

1. Open a terminal and navigate to the root directory of the project.

2. Run the make command:

   make

File Structure

.
├── builtins
│   ├── builtins.c
│   └── dump.c
├── executor.c
├── executor.h
├── initsh.c
├── main.c
├── Makefile
├── node.c
├── node.h
├── parser.c
├── parser.h
├── pattern.c
├── prompt.c
├── Readme.md
├── scanner.c
├── scanner.h
├── shell.h
├── shunt.c
├── source.c
├── source.h
├── strings.c
├── symtab
│   ├── symtab.c
│   └── symtab.h
└── wordexp.c

Code Formatting

This project uses clang-format for code formatting. The style is defined in the .clang-format file in the root directory of the project.

To format your code, navigate to the root directory of the project in your terminal and run the following command:

find . -iname '*.c' -o -iname '*.h' | xargs clang-format -i

Author

This project was created by Huzaifa Naseer.

Connect with me on LinkedIn.