Re: file descriptor passing (jail related question)

From: David S. Miller (davem@redhat.com)
Date: Fri Jul 19 2002 - 16:53:24 EST


   From: Shaya Potter <spotter@cs.columbia.edu>
   Date: 19 Jul 2002 17:58:07 -0400

   How does file descriptor passing work. From what I can tell it uses the
   sendmsg and recvmsg calls. Is this only process to process over a non
   ip socket on the same machine (what's the right terminology for this,
   just a plain FIFO?), or could one conceivably pass a file descriptor
   over an ip socket?
   
File descriptors can only be passed over AF_UNIX sockets.
These are like fancy FIFO's on the local host using the
socket APIs for the communication and synchronization.
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