[Mimedefang] Like action_replace_with_url(), but not quite

[David F. Skoll]

On Fri, 31 Aug 2012 13:56:12 +0900
Nathan Findley <nathan at zenlok.com> wrote:

> When CHILD calls exec how is it that sendmail able to find the
> message data on STDIN?

The UNIX execve system call (which is ultimately what Perl's exec boils
down to) leaves all open file descriptors alone.  So the original forked
child's stdin becomes sendmail's stdin.

Regards,

David.