find + xargs - move files from one subdir to another

Question

My folder structure is like this:

/volume1
  /photoTest
    /folderA
      /@eaDir
      /eaDir_tmp 
    /folderB
      /@eaDir
      /eaDir_tmp 
    /folder with space
      /@eaDir
      /eaDir_tmp 

What I'm trying to do is copy files from each eaDir_tmp to their respective @eaDir folder.

I was able to get it going via:

for a in $(find /volume1/photoTest -type d -name eaDir_tmp); do rsync -vhar --chmod=a+rwx $a/ $a/../@eaDir; done;

until I hit the folder with spaces. The above script simply craps out.

After lots of googling, I tried:

find /volume1/photoTest -type d -name eaDir_tmp -print0 | xargs -0 rsync -vhra --chmod=a+rwx {} {}/../@eaDir

Dry run of this command runs without issues. But the actual run gets stuck after printing this.

sending incremental file list
@eaDir/subdir1/

And gets stuck thereon.

ps -elf | grep rsync shows bunch of rsync processes on wait and poll_s state.

Does anyone have any idea what's going on? And what the solution might be?

Update: Some clarification based on the comment:

• Move or Copy? Well the ultimate goal is to "move". But I'd like to know how to copy as well.
• What's going on - yes I'd like to know what's going on and why my commands are not working as expected. I'm hoping to learn something as I'm not a regular linux user.
• What the solution might be? Well, I'd like to know this too. :)
• What's inside eaDir folders? More folders, and then some files inside them. If it helps, the whole thing started with this: https://github.com/mbrrg/synology-thumbgen. The author suggests to delete existing @eaDir folders and simply rename eaDir_tmp. But I can't do that because existing folders contains files that I'd like to keep. I can explain but I think that'll muddy the question further.
• execdir works - in the sense it doesn't say invalid argument or throw any error. But it doesn't achieve the goal - i.e. copy the files correctly.
• How rich is my find? This is inside my Synology NAS, which I think is running BusyBox? Not sure though. How do I find out?
• If destination files exists, then I'd like to overwrite it if source is newer. Otherwise not.

Answer 1

Not sure why rsync gets stuck. but I was able to make some progress using 2 commands:

First, copy all files via:

find /volume1/photo -type d -name eaDir_tmp -exec cp -a -t {}/../@eaDir {}/. \;

Second, change file permissions:

find /volume1/photo -type d -name @eaDir -exec chmod 777 {} -R \;

Not only is this clumsy and slow, but this feels like I'm dealing with MS-DOS. Where are the linux gurus?