popen read and write?

[Michal Kolodziejczyk <miko@...>]

Hello,
I can see that popen() can be used either to read or to write data
from/to the process. Is there any hope it would be able to read and
write data at the same time?
How do you use lua when trying do write and read to/from the same
process? (under linux if this matters)

Regards,
miko