🖥️ Minishell

📝 Presentation

Minishell is a project aimed at recreating a basic command-line interpreter, inspired by Bash.
This project explores process management, inter-process communication, and file & descriptor manipulation in C.

The objective is to implement a shell capable of executing Unix commands while handling advanced features such as pipes, redirections, and signals.

🛠️ Features

✅ Mandatory Features:

• Display a prompt (minishell$) waiting for user input.
• Command history management using readline().
• Execute commands via execve().
• Handle both relative and absolute paths (PATH).
• File redirections:
  • < : Input redirection.
  • > : Output redirection.
  • << : Heredoc with a delimiter.
  • >> : Append mode output redirection.
• Pipe management (|) to chain multiple commands.
• Environment variable management ($VAR).
• Expand $? to retrieve the exit code of the last command.
• Signal handling (ctrl-C, ctrl-D, ctrl-\):
  • ctrl-C displays a new prompt.
  • ctrl-D closes the shell.
  • ctrl-\ does nothing.
• Implementation of the following built-in commands:
  • echo (with -n option).
  • cd (with absolute or relative path).
  • pwd (prints the current directory).
  • export (add/modify environment variables).
  • unset (remove environment variables).
  • env (display environment variables).
  • exit (exit the shell with a status code).

🎯 Bonus Features (if implemented):

• Logical operators (&&, ||) with priority management (()).
• Wildcard (*) support to list matching files in the current directory.

📌 Technologies Used

• C (Norminette-compliant)
• Process management (fork(), execve(), wait(), signal())
• File redirections (dup2())
• Pipes (pipe())
• Environment variable manipulation (getenv(), setenv())
• User input handling (readline())