Esta é a resposta:
#! /bin/bash
#clear
_temp="/tmp/answer.$$"
STRING=""
COUNTER=0
for i in $(ls /mnt/home/$USER/shell_logs/*.log ); do
let COUNTER=COUNTER+1
STRING=$(echo $STRING $i \"$COUNTER\" \"OFF\" )
done
dialog --backtitle "Radiolist" --radiolist "test" 0 0 0 $STRING 2>$_temp
result='cat $_temp'
clear
cat $result