rsync always reporting exit status 0 when ran with eval in the script, even when failing

**Describe the bug**  
Exit status not reported correctly when rsync is ran with eval within the script

**To Reproduce**  
Run shrink-backup where rsync fails for one reason or another

**Additional context**  
The eval line always returns exit status 0 even if it fails.
If for example rsync is not installed, eval will still report exit status 0 (success)
