On 11/29/18 4:32 PM, Mark Raymond wrote:
This sounds similar to a problem I have just encountered.
If I have filesystems mounted at:
/mnt/foo
/mnt/foo/subfs
then do
mount --bind /mnt/foo /mnt/bar
then the contents of `/mnt/foo` and `/mnt/bar` are different, because
`/mnt/foo/subfs` has contents but `/mnt/bar/subfs` does not have
contents. However
diff -r /mnt/foo /mnt/bar
returns no results. However in my case, rsync is also unable to show the
differences.
POSIX says that a file is uniquely determined by its inode and device
number. If you have a file system that reports the same device for
different contents, your file system is broken, and it's no wonder that
LOTS of Unix tools will fail to see the differences, because your file
system is lying. We can't fix it in diffutils; that would have to be a
fix in the kernel implementation of your file system driver.
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3266
Virtualization: qemu.org | libvirt.org
