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Subject: Re: file descriptor passing (jail related question)
From: Shaya Potter <spotter@cs.columbia.edu>
To: "David S. Miller" <davem@redhat.com>
Cc: linux-kernel@vger.kernel.org
In-Reply-To: <20020719.145324.122050429.davem@redhat.com>
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	<20020719.145324.122050429.davem@redhat.com>
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Date: 19 Jul 2002 18:35:24 -0400
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thanks, that AF_UNIX bit was what I needed to find it in stevens.

shaya potter

On Fri, 2002-07-19 at 17:53, David S. Miller wrote:
> 
>    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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