what happens to Popen()'s parent-side file descriptors?

[Lawrence D'Oliveiro]

In message <pan.2010.10.15.06.27.02.360000 at nowhere.com>, Nobody wrote:

> Another gotcha regarding pipes: the reader only sees EOF once there are no
> writers, i.e. when the *last* writer closes their end.

Been there, been bitten by that.