Ludovic Courtès <ludo@gnu.org> skribis:

> But this illustrates another problem: in the child process, right before
> ‘execve’, the finalization thread may be restarted, in which case it
> creates a new pipe.
>
> In the example below, the finalization pipe is on FDs 9 and 7, but
> ‘install-current-ports!’ blindly dups to FD 7, thereby closing one end
> of the finalization pipe that was just created:

The hack below addresses that (mostly) by reserving low-number file
descriptors before the signal and finalization threads create their
pipe.  (In practice, we can only reserve FDs above 5; FDs 3 and 4 are
the “sleep pipe” I believe.)

It seems to be good enough though.

Thoughts?

Ludo’.