coreutils 6.12-2 on 1.7: du /proc/registry/KEY fails

[Christian Franke <Christian dot Franke at t-online dot de>]

du.exe from coreutils 6.12-2 does not work with /proc/registry/KEY:

$ du /proc/registry/HKEY_LOCAL_MACHINE
du: cannot access `/proc/registry/HKEY_LOCAL_MACHINE/HARDWARE': No such 
file or directory
du: cannot access `/proc/registry/HKEY_LOCAL_MACHINE/SAM': No such file 
or directory
du: cannot access `/proc/registry/HKEY_LOCAL_MACHINE/SECURITY': No such 
file or directory
du: cannot access `/proc/registry/HKEY_LOCAL_MACHINE/SOFTWARE': No such 
file or directory
du: cannot access `/proc/registry/HKEY_LOCAL_MACHINE/SYSTEM': No such 
file or directory
0       /proc/registry/HKEY_LOCAL_MACHINE

This results in a .stackdump.

According to strace output, the problem probably occurs due to a failing 
dup() call:

fhandler_virtual::opendir: 0x6BB5F8 = opendir 
(/proc/registry/HKEY_LOCAL_MACHINE)
dtable::dup2: dup2 (3, 4)
...
fhandler_base::dup: dup(/proc/registry/HKEY_LOCAL_MACHINE) failed, 
handle 80000002, Win32 error 6
...
dtable::dup_worker: oldfh->dup failed


No problem if a subkey is used as argument:

$ du -b /proc/registry/HKEY_LOCAL_MACHINE/SYSTEM
56      /proc/registry/HKEY_LOCAL_MACHINE/SYSTEM/ControlSet001/Control/AGP
...

The problem can also be reproduced with cygwin 1.7.0-31, so this is 
unrelated to my recent registry patches.

find and ls work as expected on /proc/registry/KEY.
du.exe from Cygwin 1.5 (coreutils 6.10-2), also works as expected on 1.7.


Christian


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