Operational Simulation of a Mini Operating System (C++ OOP Demo)

A C++17 project demonstrating a "mini operating system" concept using Object-Oriented Programming (OOP).
This project simulates two classic OS modules — Process Management and File System — by implementing process scheduling and basic file operations (create/read/delete/rename/move/list).

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Structure

mini-os/
├── main.cpp         # Entry point: demo of process scheduling + file operations
├── Process.h        # Declaration of Process class (name, priority, sort/print methods)
├── Process.cpp      # Implementation of Process class
├── FileSystem.h     # Declaration of FileSystem class (CRUD, rename, move, list)
├── FileSystem.cpp   # Implementation of FileSystem class (using <filesystem> and std::rename)
└── Makefile         # Build script (g++ -std=c++17)

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Requirements

• g++ 9+ or any compiler supporting C++17
• OS: Linux / macOS / WSL

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Build & Run

make          # build the mini_os executable
./mini_os     # run demo
make clean    # remove executable

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Features

1. Process Management

• Sorting: sort by priority (ascending order)
• Printing: print processes in scheduling order
• Interfaces: Process::sortProcesses, Process::printProcesses

2. File System

• Create: createFile(name, content)
• Read: readFile(name) (read one line for demo)
• Delete: deleteFile(name)
• Rename: renameFile(oldName, newName)
• List: listDirectory(path) (display absolute path + file list)
• Move: moveFile(src, dst) (uses create_directories then std::rename)

Why Move/Rename uses std::rename?
On the same filesystem, rename/move simply updates the directory entry pointing to an inode —
it does not actually move the physical data blocks. That’s why it’s very fast and almost atomic.