Bug 211692

Description of problem:
Kadischi (in movefiles.py) uses shutil.copytree() to copy files from the livecd
directory into the system directory.  Unfortunately, copytree() doesn't work
with device special files.  This becomes a problem when copying the contents of
the /etc/udev directory as there may be precreated device files in one of the
subdirectories.

Version-Release number of selected component (if applicable):
kadischi cvs checkout 10-20-2006

How reproducible:
Always

Steps to Reproduce:
1. Have kadischi install the xorg-x11-drv-nvidia package from livna into the livecd.
2. This package creates /etc/udev/devices/* files which are device files
3. kadischi invokes movefiles.py which runs shutil.copytree().  When copytree()
tries to copy the device files, it raises an exception.
  
Actual results:
Exception is raised and kadischi terminates

Expected results:
Kadischi handles the exception and continues.

Additional info:
shutil.py copytree() has a note in the code that it doesn't handle sockets nad
device files properly.  It looks like we may need to make our own version that
does  (Maybe upstream would be interested in it as well.)

There's an if-then-else in shutil that checks for symlinks and directories.  It
also needs to check for device special files using stat before it can decide
that it's just a regular file and perform a normal copy.

Note: With the current implementation of copytree(), if the device files
reference a device built into the buildhost's kernel, we'll probably end up
reading from the device and outputting that data to the other directory.