You should be fine as long as you don't add --delete. I would start with rsync -vai --dry-run SOURCE/ TARGET/ Add whatever the OSX specific option is (I think -E)
Yes, --dry-run shows you what it would have done without --dry-run and
yes, if you can't read all the files then you need to run it as root.
On 02/22/2017 08:57 AM, David Epstein wrote:
> All the files and directories I want to talk about are on the same machine (a
> Mac). I have a directory that I will call SOURCE. This contains a a number
> of files, some of which are directories containing further files. I want to
> copy these files to another directory, which I will call TARGET. Please
> assume that SOURCE and TARGET include absolute path-names. I think they
> should also end in a slash (subject to correction).
>
> If a top-level file/directory is present in TARGET, but not in SOURCE, I do
> not want it to be disturbed.
> If a top-level file/directory is not present in TARGET, but is present in
> SOURCE, I want it to be recursively copied into TARGET
> If a top-level file/directory is present in TARGET and also present in
> SOURCE, I want it to overwrite, so that the ccorresponding file/directory in
> TARGET at the end of the rsync job is a copy of what is in SOURCE, with the
> same permissions and date-stamps.
>
> Since it’s on a Mac, I also want to transfer extended attributes.
>
> I would be grateful for the recommended recipe.
>
> Would dry-run tell me what rsync proposed to delete as well as what it
> proposed to install. It’s because I don’t understand the option dry-run fully
> that I’m reluctant to use trial-and-error to get to the right command.
>
> I think I would have to use “sudo” since some of the files are not readable
> by me when I am an ordinaty user.
>
> Thanks
>
>
>
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