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 Ahmet Hakan Gunes 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/csalihburak/minishell.git

# 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