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Re: copy directory tree, mapping to new owners

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On 12/09/21 12:52 pm, Greg Wooledge wrote:
> On Sun, Sep 12, 2021 at 12:43:29PM +1200, Richard Hector wrote:
>> The context of my question is that I'm creating (or updating) a test copy of
>> a website. The files are owned by one of two owners, depending on whether
>> they were written by the server (actually php-fpm).
>> 
>> To do that, I want all the permissions to remain the same, but the ownership
>> should be changed according to a provided map. For example, if the old file
>> was owned by 'mysite', the copy should be owned by 'mysite_test'. If the old
>> file was owned by 'mysite-run' (the user php runs as), the copy should be
>> owned by 'mysite_test-run' (if that has to be 'mysite-run_test' to make
>> things easier, I can live with that).
> 
> cd /src
> mkdir -p /dest
> rsync -a . /dest/      # The trailing / matters.
> cd /dest
> find . -user mysite -exec chown mysite_test {} +
> find . -user mysite-run -exec chown mysite-run_test {} +

Thanks, that looks reasonable. It does mean, though, that the files 
exist for a while with the wrong ownership. That probably doesn't 
matter, but somehow 'feels wrong' to me.

My habits would also lead me to do all of the above from above the two 
directories in question (in my case, /srv - for /srv/mysite/doc_root and 
/srv/mysite_test/doc_root) So:

cd /srv

# actually not necessary? rsync will create it
mkdir -p mysite_test/doc_root

# The trailing / matters. Does it matter on the source as well?
# I generally include it.
rsync -a mysite/doc_root/ mysite_test/doc_root/      # The trailing / 
matters.

find mysite_dest -user mysite -exec chown mysite_test {} +

# I prefer mysite_test-run; it keeps consistency with
# the ${sitename}-run pattern used elsewhere
find mysite_dest -user mysite-run -exec chown mysite_test-run {} +

Have I broken anything there?

> This is what I would do.  And I would do it *interactively*.
> 
> If you insist on making a script, then it will be slightly more
> complicated, because you'll need to add error checking.

The trouble with doing it interactively, when it needs to be done many 
times (and on several sites), is that each time there's opportunity to 
make a mistake. And it means the process needs to be documented 
separately from the script.

In fact, I'd incorporate the above in a larger script, which does things 
like copying the database (and changing the db name in the site config).

Error checking in shell scripts is something I certainly need to learn 
and practice more - I tend to rely somewhat on 'knowing' what I'm 
working with, which is probably not a good idea.

Thanks,
Richard

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copy directory tree, mapping to new owners Richard Hector <richard@walnut.gen.nz> - 2021-09-12 02:50 +0200
  Re: copy directory tree, mapping to new owners Greg Wooledge <greg@wooledge.org> - 2021-09-12 03:00 +0200
    Re: copy directory tree, mapping to new owners Richard Hector <richard@walnut.gen.nz> - 2021-09-12 03:50 +0200
      Re: copy directory tree, mapping to new owners john doe <johndoe65534@mail.com> - 2021-09-12 09:00 +0200
        Re: copy directory tree, mapping to new owners Andrei POPESCU <andreimpopescu@gmail.com> - 2021-09-12 12:30 +0200
        Re: copy directory tree, mapping to new owners Richard Hector <richard@walnut.gen.nz> - 2021-09-13 01:50 +0200
          Re: copy directory tree, mapping to new owners <tomas@tuxteam.de> - 2021-09-13 09:10 +0200
            Re: copy directory tree, mapping to new owners Richard Hector <richard@walnut.gen.nz> - 2021-09-14 08:20 +0200
              Re: copy directory tree, mapping to new owners <tomas@tuxteam.de> - 2021-09-14 09:00 +0200
                Re: copy directory tree, mapping to new owners David Wright <deblis@lionunicorn.co.uk> - 2021-09-14 15:50 +0200
                Re: copy directory tree, mapping to new owners Richard Hector <richard@walnut.gen.nz> - 2021-09-15 01:00 +0200
      Re: copy directory tree, mapping to new owners l0f4r0@tuta.io - 2021-09-12 09:00 +0200
        Re: copy directory tree, mapping to new owners Curt <curty@free.fr> - 2021-09-12 16:30 +0200
          Re: copy directory tree, mapping to new owners l0f4r0@tuta.io - 2021-09-12 18:40 +0200
        Re: copy directory tree, mapping to new owners Richard Hector <richard@walnut.gen.nz> - 2021-09-13 01:50 +0200
      Re: copy directory tree, mapping to new owners l0f4r0@tuta.io - 2021-09-12 09:20 +0200
  Re: copy directory tree, mapping to new owners Teemu Likonen <tlikonen@iki.fi> - 2021-09-12 09:50 +0200
    Re: copy directory tree, mapping to new owners <tomas@tuxteam.de> - 2021-09-12 10:10 +0200
    Re: copy directory tree, mapping to new owners Richard Hector <richard@walnut.gen.nz> - 2021-09-13 02:10 +0200

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