Simple Shell

This project is an implementation of a simple Unix shell in C. The shell serves as the interface for users to interact with the operating system by entering commands. It reads and executes commands from either a file or the terminal, providing a way for users to communicate with the operating system.

Learning Objectives

• Understand the design and implementation of the original Unix operating system.
• Recognize key figures involved in the development of Unix, including creators of the first Unix shell and the B programming language.
• Comprehend the working principles of a shell and differentiate between a function and a system call.
• Manipulate the environment of the current process and create new processes.
• Utilize system calls, such as fork, execve, and wait, to manage processes.
• Understand the concept of a process ID (PID) and parent process ID (PPID).
• Implement a basic shell that can execute commands and manage environment variables.

Requirements

General

• Allowed editors: vi, vim, emacs
• Compiled on Ubuntu 20.04 LTS using gcc with options -Wall -Werror -Wextra -pedantic -std=gnu89
• Code follows the Betty style and passes checks with betty-style.pl and betty-doc.pl
• No memory leaks in the shell
• No more than 5 functions per file
• All header files include guards
• Use system calls only when necessary

GitHub

• One project repository per group, with collaborators added
• Follow the specified structure for the project repository

Output

• Shell produces the exact same output and error output as /bin/sh

List of Allowed Functions and System Calls

• List of Allowed Functions and System Calls

Compilation

Compile the shell using the following command:

gcc -Wall -Werror -Wextra -pedantic -std=gnu89 *.c -o hsh

## How to add Author file
`Bash script for generating the list of authors in git repo`

#!/bin/sh

git shortlog -se
| perl -spe 's/^\s+\d+\s+//'
| sed -e '/^CommitSyncScript.*$/d' \

AUTHORS