Simple Shell

This is a simple shell program written in C that provides basic command-line functionality. It supports a subset of common shell commands and features.

Table of Contents

• Features
• Getting Started
• Usage
• Allowed Functions and System Calls
• Contributing
• License

Features

• Basic command execution
• Path resolution for command execution
• Environment variable handling
• Built-in commands: cd, env, setenv, unsetenv, alias
• Error handling for common system calls

Getting Started

Prerequisites

• GCC (GNU Compiler Collection)
• Linux/Unix environment

Building the Shell

gcc *.c -o simple_shell

Running the Shell

./simple_shell

Usage

Once the shell is running, you can enter commands as you would in a regular shell. Here are some examples:

$ ls
$ cd /path/to/directory
$ setenv MY_VARIABLE my_value
$ alias myalias='echo Hello, World!'
$ myalias

Allowed Functions and System Calls

The following functions and system calls are allowed in this shell:

• access, chdir, close, closedir, execve, exit, _exit
• fflush, fork, free, getcwd, getline, getpid, isatty
• kill, malloc, open, opendir, perror, read, readdir
• signal, stat, lstat, fstat, strtok, wait, waitpid, wait3, wait4
• write

Contributing

Contributions are welcome! If you have any improvements or bug fixes, feel free to submit a pull request.

1. Fork the repository
2. Create your feature branch (git checkout -b feature/my-feature)
3. Commit your changes (git commit -m 'Add some feature')
4. Push to the branch (git push origin feature/my-feature)
5. Open a pull request

License

This project is licensed under the MIT License - see the LICENSE file for details.