LowerIt

#!/bin/bash
##
## "LowerIt"
##
## Original code found here:  http://www.linuxjournal.com/content/convert-filenames-lowercase ;  though this looks nothing like it.
## Modified by Maiya78 to change directory names, to work recursively, and to support unicode filenames on GNU systems.  I also copyedited the comments.  :3
##
## From the current directory, recursively convert to lower case all file and directory names
## Should ask for verification before overwriting an existing file.
##
## ------------------------------------------------------------------------------------------------------------

## Make sure we're in the right directory
export strStartDir="$(pwd)"

## Write in a function the loop that we'll use for to edit the files
function editingloop {
    if [[ -d "$strDir" ]]; then
        cd "$strDir"
        ## Check to make sure current directory isn't empty
#        if [[ $(echo $strDir/*) != $(echo $strDir'/*') ]]; then  ## Doesn't seem to be working.  :\
            echo '
_______________________________________________________________________
Entering current directory:  '"$strDir"
            echo '
Current directory before edit:  ' && ls
            ## Start the editing loop
            for strItem in "$(ls -a)"; do
                ## Save the computer some breath on . and ..
                if [[ "$strItem" != '.' || '..' ]]; then
                    ## Set a variable equal to the lowercased vesion of the original filename
                    strLowerCasedItem=$(echo "$strItem" | sed 's/[[:upper:]]*/\L&/')
                    ## If this variable is the same as the original, then the original was already lowercased, so we skip it.
                    if [[ "$strLowerCasedItem" != "$strItem" ]]; then
                        mv -i $(echo "$strDir"'/'"$strItem") $(echo "$strDir"'/'"$strLowerCasedItem")  ## '-i' makes sure that we check with the user before clobbering
                    fi
                fi
            done
            echo '
Current directory after edit:  ' && ls
#        fi
    fi
}

## Lowercase all items in the starting directory
export strDir="$strStartDir"
editingloop
unset strDir

## This loops the main loop through each subdirectory of the starting directory
for strDir in $(echo "$strStartDir"/*); do
editingloop
done

exit 0