Mail Archives: cygwin/2005/01/19/07:49:48
Wim Heemskerk Lists wrote:
> I (want to) use rsync under cygwin to sync files from a Linux box to a
> WinXP box. I want to maintain a full backup, including the file
> permissions.
Without something like NIS or LDAP to synchronize the user and group
databases between the machines, I think you will have problems with that
goal.
> -> rsync locks itself out sometimes: when I sync a file my way with
> permissions like this: rwxrwx--- user1:user1 rsync will make it just
> fine. But: when it wishes to update that file next time, it has no
> access.
Are you running rsync as the SYSTEM user?
> -> rsync handles this rather badly btw: it goes to 100% CPU use and
> stays there forever and ever, not getting any further
I've seen this before, but only on a Win98 box, where it would freeze
the machine, hard. I have no more information on the problem beyond
that, and won't be able to investigate it because that box has since
been replaced by a WinXP box.
> -> WinXP info tell me that to get this special access the application
> must use the NTFS back-ups API. Apperently cygwin+rsync does not.. how
> can I change that?
Such an effort would be best done with a native port of rsync, I'd
think. Adding Win32-specific calls to Cygwin rsync would be missing the
whole point of Cygwin, I think.
Bottom line, I think if I had a hard requirement to back up files with
permissions from a Linux box to a Win32 box, I'd just tar them up and
send the tar file to the PC. If you don't compress the tar file,
there's a nonzero chance that rsync can still save some I/O when
synchronizing after the first copy.
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