Android Chroot DNS Updater Script (Linux Deploy / Nethunter)

and-chroot-dns.sh

#!/system/xbin/bash

# Android Linux chroot DNS Updater Script
# Written by: Geofferey @ XDA / IG
# For updating /etc/resolv.conf in chroot
# Tested on Kali Nethunter / Linux Deploy
# Chroot placed in directory not file.img
# Works on Android Version Nougat 7.1.2 
# Place in init.d of Nethunter or Android

## Begin main loop

while true; do

##Retrieve current Android DNS setting & assign to var

CHROOT_RESOLV_CONF=/data/local/nhsystem/kali-armhf/etc/resolv.conf

DNS_1="$(getprop net.dns1)"

## Begin secondary loop

while true; do

## Retrieve comparison Android DNS setting & assing to var

DNS_COMP="$(getprop net.dns1)"

sleep 5

## Compare the vars, if diff break secondary loop

if [ "$DNS_COMP" != "$DNS_1" ]; then
break
fi

done

## Obtain & set the name servers in chroot resolv.conf

DNS_1="$(getprop net.dns1)"
DNS_2="$(getprop net.dns2)"

echo "nameserver" $DNS_1 > $CHROOT_RESOLV_CONF
echo "nameserver" $DNS_2 >> $CHROOT_RESOLV_CONF

done