Updates the Sao_Paulo Timezone (2012..2016) and does some basic checking after that

timezone-Sao_Paulo.sh

#!/bin/bash

# Updates the Sao_Paulo Timezone (2012..2016) and does some basic checking after that

echo -n 'Checking for zic: '
which zic &>/dev/null
if [ ${?} -eq 0 ]
then
	echo -ne 'OK\n'
else
	echo -ne 'FAILED\n'
	exit 1
fi

echo -n 'Checking for zdump: '
which zdump &>/dev/null
if [ ${?} -eq 0 ]
then
	echo -ne 'OK\n'
else
	echo -ne 'FAILED\n'
	exit 1
fi

echo 'Backing up /etc/localtime to /etc/localtime.bkp'
sudo cp /etc/localtime{,.bkp}

echo "Passing timezone rules to zic @ ${HOSTNAME}"
cat <<EOF | sudo zic
	Rule Brazil 2012 only - Feb 26 00:00 0 S
	Rule Brazil 2012 only - Oct 21 00:00 1 D
	Rule Brazil 2013 only - Feb 17 00:00 0 S
	Rule Brazil 2013 only - Oct 20 00:00 1 D
	Rule Brazil 2014 only - Feb 16 00:00 0 S
	Rule Brazil 2014 only - Oct 19 00:00 1 D
	Rule Brazil 2015 only - Feb 22 00:00 0 S
	Rule Brazil 2015 only - Oct 18 00:00 1 D
	Rule Brazil 2016 only - Feb 21 00:00 0 S
	Zone Brazil/East -3:00 Brazil BR%sT
EOF


echo "Checking up years between 2012 and 2016..."
for i in `seq 2 6`
do
	contents=`zdump -v /etc/localtime | grep -e "201[${i}]"`
	echo -ne "\n201${i}: "
	[ "${contents}" != "" ] && echo -ne "OK\n${contents}\n" || echo -ne 'FAILED\n'
done