realname "Unix I/O support for Pipe"

define PIPE_UNIXFD_IO
modset unix,beos

load_on auto

<add>
fd_unix.h
fd_unix.cpp
</add>

<os>
aix
beos
cygwin
darwin
freebsd
dragonfly
hpux
irix
linux
netbsd
openbsd
qnx
solaris
tru64
</os>
