#!/bin/bash
#enter input encoding here
FROM_ENCODING="ISO_8859-1"
#output encoding(UTF-8)
TO_ENCODING="UTF-8"
#convert
CONVERT="iconv -f $FROM_ENCODING -t $TO_ENCODING"
#loop to convert multiple files
for file in ./*.txt; do
  encoding=$(file -I "$file" | awk '{print $3}')
  if [ "$encoding" == "charset=iso-8859-1" ]; then
    $CONVERT "$file" >"$file.new" &&
    mv -f "$file.new" "$file"
  fi

done
exit 0