[BASH] KeepTime on OSX with Dead Battery

#!/bin/bash


# This script was designed to keep time for Laptop's running *NIX systems with dead CMOS batteries
# Specfically Mac OSX but it can be adapted to other *NIX Systems, use a launch daemon to run on osx

#Written By:
#Geofferey A. Eakins


#Set up directories & create .conf file

if [ $(find /usr/share/fixes | wc -l ) -eq 0 ]; then
echo "";
echo "Setting up directories & creating .conf file...";
sleep 1;
mkdir -p /usr/share/fixes/time;
cp ./set-time /usr/share/fixes/time;
cp ./com.geofferey.keeptime.plist /Library/LaunchDaemons/com.geofferey.keeptime.plist;
chmod 0755 /usr/share/fixes/time/set-time;
ln -s /usr/share/fixes/time/set-time /usr/bin/set-time;
chmod 0644 /Library/LaunchDaemons/com.geofferey.keeptime.plist;
fi

if [ $(find /usr/share/fixes/time -name time.conf | wc -l) -eq 0 ]; then
touch /usr/share/fixes/time/time.conf;
echo "SAVEDTIME=" >> /usr/share/fixes/time/time.conf
fi


#Use variables from .conf file

. /usr/share/fixes/time/time.conf


#Variables

DATE=$(date +%m%d%H%M%Y)
YEAR=$(date +%Y)


#Check year & set time from variable in .conf file

echo ""
echo "Checking year and setting date/time if reset..."
sleep 1

[ $YEAR -lt 2014 ] && date $SAVEDTIME


#Check for active connection to internet & continue script if pass or fails

echo ""
echo "Checking for active internet connection before continuing..."
sleep 1

for i in {1..1000};
do ping -c1 www.google.com > /dev/null 2> /dev/null  && break;
done


#Update time via ntp server

echo ""
echo "Updating time via ntp server..."
sleep 1

ntpdate -u $(systemsetup -getnetworktimeserver|awk '{print $4}') > /dev/null 2> /dev/null


#Save time to variable in .conf file if year is greater than 2001

echo ""
echo "Saving date & time to file..."
sleep 1

if [ $YEAR -gt 2001 ] ; then
sed -i -e "s/^SAVEDTIME=.*/SAVEDTIME=$DATE/" /usr/share/fixes/time/time.conf &&
rm /usr/share/fixes/time/time.conf-e
fi

echo ""
sleep 1
echo "Done!"
echo ""


exit 0