Snippets to extract path, filename, and extension from a full path input in bash. More info: https://gfxhacks.com/renaming-files-by-date-from-metadata/#extracting-path-filename-and-extension

extractPathDetails.sh

FILEPATH=`dirname path/to/file.ext`
# returns: path/to

FILENAME=`basename path/to/file.ext`
# returns: file.ext

FILENAME=`basename path/to/file.ext | rev | cut -d . -f 2- | rev`
# returns: file

FILEEXT=`rev <<< path/to/file.ext | cut -d . -f 1 | rev`
# returns: ext