Minimalistic-Shell

The Simple Minimalistic Shell is a program designed for launching other programs within a Linux environment. It provides users with a textual interface to enter commands, which are then executed by the shell. The project implements both interactive and batch modes of execution.

Basic Functionalities

Interactive Mode

• Users can enter commands interactively.
• Each command line starts with a prompt displaying the current working directory and ends with the % character.
• Commands are executed in child processes, and the output is displayed within the shell.
• The shell waits for new commands after executing each one.
• Typing "quit" exits the shell.

Batch Mode

• Users can write a text file containing multiple commands, each on a distinct line.
• The shell executes commands sequentially from the file.
• Commands are executed one by one until the end of the file or the "quit" command is encountered.

Command Types

• Simple Command: Executes a single program with its specified arguments.
• Compound Command: Contains special operations such as ;, &, &&, and || for sequential or parallel execution of commands or | pipe for output redirection.

Examples of Compound Commands:

* cmd1 ; cmd2 ; cmd3
* cmd1 && cmd2
* cmd1 | cmd2
* cmd1 && cmd2 ; cmd3 || cmd4 ; cmd5

Implementation Details

• The project is developed under a Linux environment.
• It does not use the system() function and relies on system calls such as open(), fork(), exec(), and wait().