Coding a Keylogger in Raw C - No Libraries

A hands-on walkthrough of building a keylogger in raw C on Linux without external libraries, exploiting the Linux 'everything is a file' philosophy. The tutorial reads directly from /dev/input event files using low-level system calls (open, read) and the kernel's input_event struct from linux/input.h. It covers opening device files with proper permissions (sudo), filtering events by type (EV_KEY) and value (key-down = 1) to avoid duplicate events, and mapping key codes to printable characters via a large if-else chain. The result captures keystrokes globally across all applications.