Roger Heflin wrote:
> Devices don't export across nfs, they are a way for you to reference a 
> "device" in the kernel and don't work across 2 separate machines.

That makes sense. Though depending on what layer network redirection 
occurs at, I'd expect the NFS layer to see the device as a file, with 
the kernel translating the file I/O to device I/O at a lower layer. It 
might make a difference whether you're using a kernel or user-space NFS 
server.


> Named pipes don't export either...

Are you sure? This I'm more skeptical of. I'll have to try an experiment 
and see what happens when a named pipe is read from via NFS, SMB, and 
sshfs. My expectation is that the network file system daemon will pass 
on the file I/O operations to the named pipe, and the underlying file 
system driver and the kernel will implement the pipe I/O.

What you say is backed up by this FAQ:
http://www.unixguide.net/unix/programming/2.10.4.shtml
  and:
http://developers.sun.com/solaris/articles/named_pipes.html

but it doesn't give an explanation of why it doesn't work.

I couldn't find anything definitive saying named pipes don't work with 
SMB, but I couldn't find anything definitive saying they do, either. The 
issue gets muddy, because some of the search hits are talking about 
enhancing Samba client libraries to support named pipes on Windows servers.

  -Tom


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