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How Terminals Work

how-terminals-work.vercel.app · 1,515 words · saved by 1 readers

Learn how terminal emulators and TUIs work through interactive demos. Explore the grid model, escape sequences, keyboard input, and more.

Sends SIGINT (signal interrupt) to the foreground process. Most programs respond by stopping immediately. It's how you cancel a long-running command or exit a program that's stuck. Sends SIGTSTP (signal terminal stop) to suspend the process. The program pauses but stays in memory. Use `fg` to resume it in the foreground, or `bg` to continue it in the background. Signals are a way for the operating system to communicate with running programs. When you press Ctrl+C, your terminal sends a byte (0x03) to the PTY—but the kernel intercepts it and converts it into a signal before your program ever se

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