John Baldwin 61e69c80e4 Add support for fifos to UDF:
- Add a separate set of vnode operations that inherits from the fifo ops
  and use it for fifo nodes.
- Add a VOP_SETATTR() method that allows setting the size (by silently
  ignoring the requests) of fifos.  This is to allow O_TRUNC opens of
  fifo devices (e.g. I/O redirection in shells using ">").
- Add a VOP_PRINT() handler while I'm here.
2009-02-06 20:09:14 +00:00
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