#! /bin/sh

for A do

 AB=`basename "$A"`
 TEMP=`mktemp -t "${AB}.XXXXXX"`
 BAK=`mktemp -t "${AB}.XXXXXX"`

 iconv -f windows-1250 "$A" > "$TEMP"

 mv -f "$A" "$BAK"

 mv "$TEMP" "$A"

done