Re: CGI-Output truncated - what does POLLHUP mean?

> You are supposed to get a POLLHUP if the pipe closed unexpectedly, i.e.
> if there is an error on the pipe.

 It's been a few years since I've experimented with this, and newer
kernels might have changed behaviours, but I remember getting POLLHUPs
on Linux in some normal EOF situations.
 It happened either with pipes or with sockets - I don't remember which
one: when the last batch of data (followed by EOF) arrived, poll()
returned *both* POLLIN and POLLHUP. In other situations, the last
batch of data just triggered POLLIN, and subsequent poll()s returned
POLLHUP.

 The workaround for me was to always handle POLLIN first, and POLLHUP
later, in the poll() loop, so the data, if any, gets read first, and
the connection gets closed later.
Moving the "if (x[blah].revents & POLLHUP) break ;" line to the end
of the loop should make things work in every case.

-- 
 Laurent