Set timezone by geolocation on Android using root sheel, Termux and IPgeolocation.io

set-timezone-from-gps.sh

#!/bin/sh

#
# Proof-of-concept geolocation-based timezone changer
#
# Requires:
#
#  * Termux with termux-api package installed
#  * Fine locatiin permission granted
#  * Free API ey from https://ipgeolocation.io
#  * Root access
#
# Author: Vasyl Gello <[email protected]>
# License: Apache-2.0
#

# Change this to your IPGeolocation.io API key

IPGEOLOCATION_API_KEY=""

GEOLOCATION=$(termux-location | jq -r '"lat=\(.latitude)&long=\(.longitude)"')
RESPONSE=$(curl "https://api.ipgeolocation.io/timezone?apiKey=$IPGEOLOCATION_API_KEY&$GEOLOCATION")

if [ ! -z "$RESPONSE" ]; then
	TIMEZONE=$(echo "$RESPONSE" | jq -r '.timezone')

	if [ -z "$TIMEZONE" ]; then
		echo "ERROR: Timezone response is empty"
		exit 1
	fi

	# Call AlarmManager.setTimeZone on LineageOS 14.1 (Android 7.1.2)
	# Idea taken from:
	# http://v-kompany.blogspot.com/2014/07/how-to-call-system-service-in-adb.html

	su -c "service call alarm 3 s16 \"$TIMEZONE\" | \
		grep \"Result: Parcel(00000000 \" \
		1>/dev/null 2>/dev/null"

	if [ $? -eq 0 ]; then
		echo "Timezone set to: $TIMEZONE"
	else
		echo "ERROR: Cannot call AlarmManager.setTimezone!"
	fi
else
	echo "ERROR: Timezone response is empty"
	exit 1
fi