Shell script that lists files with different owner that the folder

[Zwiebi]

Hello, I'm trying to write a script which is listing files based on different preferences, like filetype or permissions. All is fine, except for one: I want to list files in /home which has a different owner than the home directory it is in.

Here is an example:
/home/UserA is the directory, and /home/UserA/foobar.txt is the file, that is owned by UserB.
If I would have to use a fixed user, this wouldn't be a problem, as I could just do

find /home/UserA \! -user UserA -exec echo "{}" is not owned by UserA \;

But I don't know, how can I use variables, that modifies the output and the checking based on who's home directory (for a /home/UserB/foobar.txt owned by UserA scenario) it is in. I was thinking about using awk to get the owner of the home directory and the file and compare it, but it doesn't feel right.
Basically I just have to find a way, to cycle through the home directories and replace the 3 UserA in my script, like this:

/home/UserA
/home/UserB
/home/UserC

find /home/UserA \! -user UserA -exec echo "{}" is not owned by UserA \;
find /home/UserB \! -user UserB -exec echo "{}" is not owned by UserB \;
find /home/UserC \! -user UserC -exec echo "{}" is not owned by UserC \;

I would appreciate any idea.

[rch1231]

Hello,

What you are trying to do is really what unix shells were designed for. Try this:

for x in `/bin/ls /home`
do
find /home/$x \! -user $x -exec echo "{}" is not owned by $x \;
done

This executes the command
/bin/ls /home
and puts the results in that place in the for loop. The reason you use/bin/ls instead of just ls is that most shells have ls aliased to color the output based on the file type and the color escape sequences wreck havoc with your code...

[Zwiebi]

Thank you for your answer!
With some help, I managed to merge my different codes together, and this is the result:

#!/bin/bash

cd /home
DIR=$( ls -l | awk '{print $3}' )

for dir in $DIR
do
  user=$( basename $dir )
  find $dir ! -user $user -type f -exec echo "{}" is not owned by $user \;
done

It's pretty much the same as yours, except this one uses the actual owners, not the foldername, which is prettier. :-)
However, I like your code, it is nice and compact. :-)