This script assumes that both dcraw and identify (from ImageMagick) are installed and available in your system's PATH.
https://www.dechifro.org/dcraw/
https://imagemagick.org/script/identify.php
If not, you may need to provide the full paths to the executables in the script.
sudo apt-get install dcrawchmod +x checkCR2.shcheckCR2.sh /path/to/folder_with_cr2_files/to_check
This script
- creates a list of all subdirectories given the parent directory passed in as argument
- leaves the original files untouched
- checks the CR2 files metadata
- checks the extracted JPEG file from the CR2 file for corruption
- if no file corruption is found in the temporary JPEG file the JPEG file is deleted
- if file corruption is present the affected CR2 file will be copied to a "damaged" folder in the current path, the temporary JPEG file will be deleted and not copied to the "damaged" folder
- checks the JPEG, PNG and GIF files with identify
- if file corruption is present in a JPEG, PNG or GIF file, the affected file will be copied to a "damaged" folder in the current path
- a detailed file report will be generated
- a list of all damaged files will be generated
- if all files are ok all log files and temporary files will be deleted
- all original modification times and creation times of all directories and all subdirectories are stored and restored before the script completes