schnippets/windows_safe_filenames.sh

#!/usr/bin/env bash

# Copied from slhck on
# https://superuser.com/questions/538161/how-to-bulk-rename-files-with-invalid-encoding-or-bulk-replace-invalid-encoded-c/858671#858671

find "$1" -depth -print0 | while IFS= read -r -d '' file; do
  d="$( dirname "$file" )"
  f="$( basename "$file" )"
  #new="${f//[^a-zA-Z0-9\/\._\-]/}"
  new="${f//[\\\/\:\*\?\"<>|]/}"
  if [ "$f" != "$new" ]      # if equal, name is already clean, so leave alone
  then
    if [ -e "$d/$new" ]
    then
      echo "Notice: \"$new\" and \"$f\" both exist in "$d":"
      ls -ld "$d/$new" "$d/$f"
    else
      echo mv "$file" "$d/$new"      # remove "echo" to actually rename things
    fi
  fi
done