cp hangs when copying pipes

[Andrew Burgess]

To reproduce:

  mkdir /tmp/zzz
  mknod /tmp/pipe p
  cp -dpuxv --parents --backup=numbered /tmp/pipe /tmp/zzz

  /tmp -> /tmp/zzz/tmp
  `/tmp/pipe' -> `/tmp/zzz/tmp/pipe'

  <hangs here>

Oddly, this invocation does work:

  cp -auxv /tmp/pipe /tmp/zzz
  `/tmp/pipe' -> `/tmp/zzz/pipe'

This is fileutils 4.1 from Redhat rpm fileutils-4.1-10.i386.rpm
running on linux 2.4.18 with low latency patch

I hope this is useful
Andrew