Your code executes ls for each file that is newer than the file named by <file_name> and if one of those files is a directory, you'll list the contents of that directory instead of the directory itself.

I think you want something like:

Code:

ls -lrt | awk -v file=<file_name> 'BEGIN        {found=0}
        found==1        {print}
        $9 == file      {found=1}'

Note, however, that this will not work if the file name indicated by <file_name> contains any whitespace characters or if any filename older than that file has a name that starts with that name and is immediately followed by a whitespace character. I assume you can work around this limitation.