Asterisk AGI and Bash

#!/bin/bash

# Consume all variables sent by Asterisk
while read VAR && [ -n ${VAR} ] ; do : ; done

# Answer the call.
echo "ANSWER"
read RESPONSE
r=$(hostname  -i)
sql=$(mysql -Dasterisk -uroot -p1234 -se "SELECT src FROM cdr limit 0,1")
space=$(df -h  | awk '{print $5}'  | awk 'NR==2')
# Say the letters of "Hello World"
#echo "SAY ALPHA "Hello World" """

#echo "EXEC "Dial" "SIP/callcentric/411" """
echo  "EXEC "saydigits" "$1" """
echo "EXEC "read" "d,demo-thanks" """
echo "SET VARIABLE "x"  "$r" "
echo "SET VARIABLE "y"  "$sql" "
echo "SET VARIABLE "dk"  "$space" "

read RESPONSE

exit 0


----------------------------------------
[channel]

exten => 500,1,AGI(/root/hello.sh,${EXTEN})
same=>n,saydigits(${d})
same=>n,sayalpha(${x})
same=>n,saydigits(${y})
same=>n,saynumber(${dk})
same=>n,sayalpha(%)