命令行C和键盘快捷键（在Mac OS中）

Question

How can I execute a command when user press a key in a command-line C application? Is it possible when window isn't focused

Answer 1

Depends on the program itself, you could do either of those:

1. block on unbuffered getc you get the key strokes as they come and not when users hits return.

2. create some sort of event loop, using select/epoll or event framework like ( libevent / libev ) and get a callback whenever a user hits a key.

3. use a toolkit like ncurses which provides a pseudo graphical command line interface and an event loop.

4. if the keys you're interesting in capturing are things like CTRL + C , you need signal handlers.