C++ System Monitor

A Linux system monitor application built with C++ that displays real-time system information similar to htop. This project is part of the Udacity C++ Nanodegree Program.

Screenshots

System Monitor in Action

Starting Monitor

Overview

This system monitor displays:

• System information (OS, Kernel version, CPU, Memory, Uptime)
• CPU utilization
• Memory usage
• Running processes with their CPU/Memory usage, uptime, and command
• Real-time updates using ncurses display

Dependencies

• cmake >= 2.6
  • All OSes: click here for installation instructions
• make >= 4.1 (Linux)
  • Linux: sudo apt-get install build-essential
• gcc/g++ >= 5.4
  • Linux: sudo apt-get install build-essential
• ncurses
  • Linux: sudo apt-get install libncurses5-dev libncursesw5-dev

Build Instructions

1. Clone this repository
2. Make a build directory: mkdir build && cd build
3. Compile: cmake .. && make
4. Alternative: Use the Makefile directly: make build

Run Instructions

1. After building, run the executable:

   ./build/monitor

   Or using the Makefile:

   make run

Project Structure

.
├── include/              # Header files
│   ├── format.h         # Time formatting utilities
│   ├── linux_parser.h   # Linux system parsing functions
│   ├── ncurses_display.h # Display interface
│   ├── process.h        # Process class
│   ├── processor.h      # Processor class
│   └── system.h         # System class
├── src/                 # Source files
│   ├── format.cpp
│   ├── linux_parser.cpp
│   ├── main.cpp
│   ├── ncurses_display.cpp
│   ├── process.cpp
│   ├── processor.cpp
│   └── system.cpp
├── CMakeLists.txt       # CMake configuration
├── Makefile             # Build automation
└── README.md

Key Components

• System: Main class that aggregates system information
• Processor: Handles CPU utilization calculations
• Process: Represents individual processes with their metrics
• LinuxParser: Parses /proc filesystem for system information
• NCursesDisplay: Provides terminal-based UI using ncurses
• Format: Utility functions for formatting time and other data

Implementation Notes

• Uses C++17 standard
• Reads from Linux /proc filesystem for system information
• Compiles with -Wall -Wextra flags for strict error checking
• Real-time display updates using ncurses library

License

This project is licensed under the MIT License - see the LICENSE file for details.

Copyright (c) 2019 Udacity