Rsync seems to work as if I had used the --numeric-ids
If rsync doesn't find a username match, it will fall-back to using the ID directly, so I would assume that the problem is that the ID names on your cygwin system aren't matching the ID names on your linux system (and perhaps they aren't what you think).
On the client side, under cygwin :
ls -l => testdir owned by testuser:mkgroup_ ls -ln => testdir owned by 11385:10513
On the server side, under linux, with winbind running with "winbind use default domain = yes", a directory on which I run "chown testuser: dir" becomes:
ls -l => directory owned by testuser:'Domain user' (group translated from French)
ls -ln => directory owned by 10000:10000
Knowing that "gentent passwd | grep testuser" shows:
testuser:x:10000:10000:testuser:/home/DOMAIN/testuser:/bin/false
When I set "winbind use default domain = no", I get th following:
DOMAIN\testuser:x:10000:10000:testuser:/home/DOMAIN/testuser:/bin/false
But, in both case, after a rsync -avP testdir $BACKUPSERVER::backuptest I get testdir owned by 11385:10513, which are unknow user/group on the server.
I had originally misread your question as one wanting to get the cygwin rsync to set ownership of the files. Towards this goal, I think we need a better "am I root" check for cygwin. The attached patch attempts to provide this. Is anyone familiar enough with cygwin to be able to comment on the appropriateness of this idiom?
Why does the rsync running on the client must be root ? It just has to send the name of the owner of the file to the server which will chown it. And my server is running as root on the linux machine.
Thank you for the time you already spent on my problem !
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