nitpick - EOF is not a signal, it just flushes the current line content without needing a newline in cooked mode and doing this on an empty line results in a 0 byte read(), which most apps interpret as EOF
and the terminal emulator is not itself sending the signals, its always just sending raw characters to the pty device - it is the kernel's pty layer sending a signal if the right flags are on and doing line buffering, local echo, etc. and signals go to the foreground process group (which is set by the shell making a tcsetpgrp syscall)
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[ 3.6 ms ] story [ 23.6 ms ] threadand the terminal emulator is not itself sending the signals, its always just sending raw characters to the pty device - it is the kernel's pty layer sending a signal if the right flags are on and doing line buffering, local echo, etc. and signals go to the foreground process group (which is set by the shell making a tcsetpgrp syscall)