Add select sample code.
tty is in line mode and using select while tty in line mode will have problem.
Add "-f" for "rm" command.
Add "-f" for "rm" command.
Switch tty from line mode to raw mode and then every input char can be detected by select.
Sample of tty from line mode to raw mode.
Add signal handler to prevent from zombie process.
Add main3.c
Add sample for readdir.