My problem with fdopen and sockets........

[Steven M. Bellovin]

In article <9556 at cit-vax.Caltech.Edu>, wen-king at cit-vax.Caltech.Edu (King Su) writes:
} Secondly, you do not need two sockets, you just need two FILEs.  You can
} apply fdopen on the same file twice.  You don't need to dup it either.
} For example:
} 
} in  = fdopen(soc,"r");
} out = fdopen(soc,"w");

That is not correct for System V; you do indeed need to do the dup().
Please note that I'm speaking empirically... (i.e., it broke on me
the other way.)