Minishell

As beautiful as a shell

Minishell is a project aimed at creating a simple shell, similar to Bash. This project will enhance your understanding of processes and file descriptors in Unix-like operating systems.

How to use it

git clone https://github.com/mendes-jv/minishell zapshell && cd zapshell && make && ./minishell

Contents

• I. Introduction
• II. Mandatory Part
• III. Bonus Part

I. Introduction

The existence of shells is fundamental to the field of computing. They provide a way for users to interact with computers through command lines rather than low-level hardware manipulations. Minishell allows you to step back in time and tackle the challenges faced before modern GUI environments, providing a hands-on experience with shell programming.

II. Mandatory Part

• Program Name: minishell

• Turn In Files: Makefile, *.h, *.c

• Arguments:

  • Use external functions like readline, printf, malloc, etc.

• Libft Authorized: Yes

• Description: Implement a shell that:

  • Displays a prompt when waiting for a command.
  • Maintains a command history.
  • Searches and executes commands based on the PATH variable or relative/absolute paths.
  • Avoids using more than one global variable for signal handling.
  • Implements quote handling for both single (') and double (") quotes.
  • Implements input/output redirection and piping.
  • Expands environment variables and the exit status of the last command.
  • Handles control signals (ctrl-C, ctrl-D, ctrl-\) appropriately.

• Builtins to Implement:

  • echo (with -n)
  • cd (with paths)
  • pwd
  • export
  • unset
  • env
  • exit

III. Bonus Part

To receive bonus credit, your implementation must include:

• Logical operators (&&, ||) with proper priority handling.
• Support for wildcard (*) expansion in the current directory.

Bonus evaluation is contingent on the mandatory part being perfect.

Grade