On Wed, 8 Sep 2004, Wayne Davison wrote:
On Wed, Sep 08, 2004 at 10:30:44AM +0200, Essyug wrote: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).
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?
It's only appropriate if /etc/group is correct.
People who use rsync to backup to Cygwin systems are probably inspired to keep their local /etc/group and /etc/passwd files in sync with the underlying OS. From personal experience, I know that I can't keep /etc/group current on all these Cygwin systems. If only I could use a tool like rsync to fix a broken /etc/group. :-)
I don't think "am I root" is the correct check. I think you want to know "can I chown". Chownability varies with the filesystem and within a filesystem based on metadata beyond our control (well within cygwin anyway), such as acls. As far as I know, the only reliable way to test if you can chown() a file, is to call chown().
I can think of 4 usefull modes:
1 The default, don't try to chown(). 2 --owner If rsync thinks it is root, then try to chown() 3 --owner-whining Always try to chown() and whine if it doesn't work. 4 --owner-no-whining Always try to chown(), don't whine if it doesn't work.
Where modes 1 and 2 are the current behaviour. Changing the current behaviour would be bad.
If there are systems where failed chown() calls are really slow, then you may want a fifth mode:
5 --owner-try-once Try to chown(), if it fails on the first call, stop
trying.Mode 4 is because the time consuming part of a failed chown() is the act of sending the error message.
Most of the above isn't specific to cygwin. The man page on a handy Linux system says:
"The chown() semantics are deliberately violated on NFS file systems ..."
Many network file systems have surprising chown() semantics.
I won't feel hurt if you don't like "whining" in the option names.
-- Paul Haas [EMAIL PROTECTED] -- To unsubscribe or change options: http://lists.samba.org/mailman/listinfo/rsync Before posting, read: http://www.catb.org/~esr/faqs/smart-questions.html
