Linux System Monitor

A system monitor for Linux developed in C++ 17 like the htop utility based on the ncurses display.

This implementation is based on the starter code for System Monitor Project in the Object Oriented Programming Course of the Udacity C++ Nanodegree Program.

ncurses

ncurses is a library that facilitates text-based graphical output in the terminal. This project relies on ncurses for display output.

You can install ncurses within your own Linux environment: sudo apt install libncurses5-dev libncursesw5-dev

How to build

1. Clone the project repository: git clone https://github.com/itornaza/cpp-system-monitor.git

2. Build the project: make build

3. Run the resulting executable: ./build/monitor

Make

This project uses Make. The Makefile has four targets:

• build compiles the source code and generates an executable
• format applies ClangFormat to style the source code
• debug compiles the source code and generates an executable, including debugging symbols
• clean deletes the build/ directory, including all of the build artifacts

System information

System information for the process manager is derived from the following system files:

1. Kernel information - /proc/version
2. Operating system - /etc/os-release
3. Memory utilization - /proc/meminfo
4. Total processes - /proc/meminfo
5. Running processes - /proc/meminfo
6. Up time - /proc/uptime
7. CPU usage - /proc/stat

Processes information also resides mainly in the /proc/ directory:

1. PID - /proc/[pid] where pid is in any directory having an integer for its name
2. UID - /proc/[pid]/status
3. Username - /etc/passwd
4. Processor utilization - /proc/[pid]/stat
5. Memory utilization - /proc/[pid]/stat
6. Command - /proc/[pid]/cmdline

More information about proc in the man page or enter man proc at the command line.