bug#69929: Can grep -q report matches in incomplete lines?

[Paul Eggert]

On 3/21/24 06:57, Niels Möller wrote:
> I'm having grep -q read input from a pipe. I would like grep to exit
> successfully as soon as a match occurs, without requiring the line to be
> terminated by newline or EOF (unless the grep pattern includes '$', that
> is).

Grep used to behave almost that way. It did wait for a newline but it 
did not wait for EOF. But people started complaining about that behavior 
so we changed it.

Perhaps there should be an option to switch between old and new behaviors.

However, not waiting for a newline is problematic; although doable it 
would be a bit of a pain to program and not sure it's worth the effort. 
Grep didn't used to do that.