42 Minishell Project

Minishell

As the name implies, this project is about creating a simple shell in C, taking bash as a reference. Impementation of clasic bash written completely from scratch with Yusuf Anıl Turgut as part of 42 Ciriculum.

• This custom shell has most of the features from original bash like custom enironment, builtins, pipes, multiple redirections, logical operators and parenthesis, signal and error handling.
• It works by geting input from user. Then dividing it into tokens. Then parsing it into varios data structures and executing.

GETTING STARTED

Prerequisites

• GCC compiler
• Make utility
• GNU readline

Building

Clone the repository:

$ git clone https://github.com/badi361/Minishell

Change directory to the project directory and compile;

$ cd minishell && make

To run the shell, simply execute the following command:

$ ./minishell

FEATURES

Command execution

• The shell supports executing external commands, built-in commands, and pipeline commands.

Input/output redirection

• The shell supports input/output redirection using the < and > characters.

Signal handling

• The shell handles the following signals:

• SIGINT (Interrupt signal)

• SIGQUIT (Quit signal)

Environment variables

• The shell supports creating, modifying, and deleting environment variables using the export and unset built-in commands.

Command history

• The shell supports command history using the readline library.

Built-in commands

• The shell supports the following built-in commands:

• echo - displays a message

• cd - changes the current directory

• pwd - prints the current working directory

• export - creates or modifies an environment variable

• unset - deletes an environment variable

• env - prints the environment variables

Acknowledgments

• This project was inspired by the Unix shell, and was built using the following resources:

• The readline library documentation

• The Bash shell documentation