Shell Programming and Scripting

$ echo "$getip"
173,194,78,95
173,194,78,100
2,19,63,139173,194,78,95
173,194,78,100
2,19,63,139

getip=$(netstat -antup 2>/dev/null | awk '
/firefox/ { 
        destip=$5
        sub(/:.*$/, "", destip)
        dest[destip]++
        }
END {
        for ( ip in dest ) print ip
        }
'
)


echo "$getip"

for ip in $getip
do
        echo "ip:$ip"
done

 if [ "$c" == "${white[${c//./}]}" ]

+ for c in '"${ip[@]}"'
+ '[' 173.194.41.66 == '' ']'

if [ "$c" == "${white[${c}]}" ]    
./test: line 13: 173.194.41.66: syntax error: invalid arithmetic operator (error token is ".194.41.66")

# associative array bash 4.0 or ksh93
# bash --version
declare -A white   # bash
#typeset -A white # ksh93

for c in 192.168.10.20 192.168.20.20 192.168.10.20
do
        [ "${white[$c]}" = "$c" ] && echo "it's in the white"
        [ "${white[$c]}" != "$c" ] && white[$c]=$c
done

for c in "${!white[@]}"
do
        echo "$c"
done