Minishell 42 project

This project is aimed at creating a shell called "minishell". This shell is designed to provide a command-line interface similar to other Unix-like shells such as Bash. It's capable of interpreting commands, executing programs, handling signals, and implementing various features expected from a shell environment.

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Installation:

1. Clone the repository:

   git clone git@github.com:evan-ite/minishell.git

2. Navigate to the project directory:

   cd minishell

3. Compile the project using make:

   make

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Usage:

Run minishell by executing the following command:

./minishell

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Rules and Functionality

• Prompt Display:
  The shell displays a prompt when waiting for a new command.
• History Support:
  A working history feature is implemented, allowing users to access previously entered commands.
• Executable Search:
  The shell searches and launches the correct executable based on the PATH variable or using relative or absolute paths.
• Global Variable Usage:
  To ensure robustness, only one global variable is used to indicate a received signal, preventing potential conflicts with signal handlers.
• Quoting Support:
  The shell handles single quotes ('), double quotes ("), and escapes () appropriately, preventing unintended interpretation of metacharacters.
• Redirections:
  Supports input (<), output (>), and append mode (>>) redirections. Also handles heredoc redirection (<<).
• Pipes:
  Implements the pipe (|) character to connect the output of one command to the input of another.
• Environment Variables:
  Supports expansion of environment variables ($ followed by a sequence of characters) to their values.
• Special Variables:
  Handles $? expansion to the exit status of the most recently executed foreground pipeline.
• Signal Handling:
  Behaves similarly to Bash for ctrl-C, ctrl-D, and ctrl-\ signals.
• Built-in Commands:
  Implements several built-in commands such as echo, cd, pwd, export, unset, env, and exit.
• Memory Management:
  Ensures no memory leaks in the codebase, although readline() function may cause memory leaks, which are left unfixed.

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Acknowledgements

• Elise van Iterson
• Tobias Surma