Add signal handler to yes.c

[su8]

Example: https://github.com/su8/iu-coreutils/blob/master/yes.c

[emmiegit]

Why does yes need a signal handler? If it receieves SIGPIPE the default action is to die, no?

[su8]

Why does yes need a signal handler?

To exit gracefully, so we don't end up allocating memory in the middle and interup the program without freeing it.

If it receieves SIGPIPE the default action is to die, no?

Can you test this since the program ismrunning in a infinite loop. Just raise() the signal and see what happens. I don't have computer around to test this.