How can I know how much to read from a subprocess

[Grant Edwards]

On 2007-09-18, spam.noam at gmail.com <spam.noam at gmail.com> wrote:

> But even if it's fast enough, how do you know how many times you
> should call read(1)? If you do it too much, you'll be blocked until
> more output is available.

You don't know.  That's why you use non-blocking mode.

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