#! /bin/bash

# upgrade lenny -> squeeze fuer kiru/sirius

set -u
set -e 

LANG=C
LC_ALL=C

#SUFFIX=`date +%F`
SUFFIX=lenny-squeeze

DPKG_OPTIONS=""
#export UCF_FORCE_CONFFOLD=1
#DPKG_OPTIONS='-o Dpkg::Options::="--force-confdef" -o Dpkg::Options::="--force-confold" -f -m --force-yes' 
#DPKG_OPTIONS='-o Dpkg::Options::=--force-confdef -o Dpkg::Options::=--force-confold' 
#if [ -f $DIRNAME/config.dat ]; then
#	export DEBCONF_DB_FALLBACK=File{$DIRNAME/config.dat} 
#	export DEBCONF_DB_OVERRIDE=File{$DIRNAME/config.dat}
#fi
#export DEBIAN_FRONTEND=noninteractive

CHECK_SERVICES=${CHECK_SERVICES:-true}
RESTART_SERVICES=${RESTART_SERVICES:-true}
EXCLUDE_SERVICES=''

GARNIX_CODE=${GARNIX_CODE:-1}

#DIRNAME=`dirname $0`
DIRNAME=$(dirname `readlink -f $0`)
if [ "${DIRNAME%/*}" != /root ] ; then
	echo "wir sollten lieber ein Verzeichnis unter /root anlegen"
	exit $GARNIX_CODE
elif [ `cat /etc/debian_version | cut -b1` = "6" ] ; then
	echo "`hostname` ist schon squeeze"
	#exit $GARNIX_CODE
	exit 0
elif  pgrep -l apt-get || pgrep -l aptitude ; then
	echo "laeuft schon einer"
	exit $GARNIX_CODE
# schon im Host-Skript
#elif [ -f RUNNING ]; then
#	echo "File RUNNING existiert"
#	exit $GARNIX_CODE
else
	touch RUNNING
fi

#trap 'rm -f RUNNING' EXIT


exit_status=0

grep -q /etc/bash_completion /root/.bashrc || echo . /etc/bash_completion >> /root/.bashrc

apt-get -y --allow-unauthenticated=true install vo lihas-keyring

dpkg --get-selections '*' > $DIRNAME/dpkg-get-selections
#cp -axi /etc  "$DIRNAME"
echo "tar -czf $DIRNAME/etc-`date +%F`.tgz /etc ..."
tar -czf $DIRNAME/etc-`date +%F`.tgz /etc   

find /etc -name '*.*-dist' -exec cp -v '{}' '{}'-lenny \;
# find /etc ..vo..

repos="ftp.de.debian.org"
#repos="approx:9999"

cat << EOF > /etc/apt/sources.list
deb     http://$repos/debian/ squeeze main contrib non-free
deb     http://$repos/debian-security/ squeeze/updates main contrib non-free
deb     http://$repos/debian/ squeeze-updates main contrib non-free
deb     http://$repos/debian/ squeeze-proposed-updates main contrib non-free
#deb     http://$repos/debian-backports squeeze-backports main contrib non-free 
EOF

echo deb http://ftp.lihas.de/debian/ stable main > /etc/apt/sources.list.d/lihas.list
rm -f /etc/apt/sources.list.d/lihas

cat << EOF > /etc/apt/preferences
Package:  *
Pin:  release a=squeeze-backports
Pin-Priority:  200

Package:  *
Pin:  release n=sid
Pin-Priority:  98

Package:  *
Pin:  release a=wheezy
Pin-Priority:  99

Package:  *
Pin:  release a=squeeze
Pin-Priority:  510

Package:  *
Pin:  release n=squeeze-proposed-updates
Pin-Priority:  510

Package:  *
Pin:  release n=squeeze-updates
Pin-Priority:  510

Package:  *
Pin:  release a=experimental
Pin-Priority:  9
EOF

##### Funktionen zur Diensteueberpruefung nach Upgrade #####

search_running_services_func () {
	ps  cft '?' | grep -v '\_' | awk '{print $NF}' | sort -u
	return 0
}

find_missing_services_func () {
	sleep 2
	services_after=`search_running_services_func`
	services_diff=`diff <(echo "$services_before")  <(echo "$services_after")` || true
	missing_servs=$(echo "$services_diff" | grep '^<'  | cut -d' ' -f2 |
			while read s; do
				[ -z "$s" ] && continue
				for e in $EXCLUDE_SERVICES; do
					[ "$s" = "${e:0:15}" ] && continue 2
				done
				echo "$s"
			done
			)
	return 0
}

### Funktionen f. Konfigurationsprobleme ###

apache_config_func () {
	if ! pgrep -x apache2 && [ -f /etc/apache2/envvars.dpkg-dist ]	; then
		cp -av	/etc/apache2/envvars  /etc/apache2/envvars.$SUFFIX &&
		cat /etc/apache2/envvars.dpkg-dist		   >  /etc/apache2/envvars &&
		echo -e "\n##### Upgrade $SUFFIX #####\n"	   >> /etc/apache2/envvars &&
		cat /etc/apache2/envvars.$SUFFIX | grep '^[^#]' >> /etc/apache2/envvars 
	
		/etc/init.d/apache2 restart
		sleep 1
	fi
}

php5_config_func () {
	cp -av /etc/php5/apache2/php.ini /etc/php5/apache2/php.ini.$SUFFIX &&
	echo -e "##### Upgrade $SUFFIX #####\nsession.use_only_cookies = 0\n" | cat - /etc/php5/apache2/php.ini.$SUFFIX > /etc/php5/apache2/php.ini

	/etc/init.d/apache2 reload
	sleep 1
}

services_before=`$CHECK_SERVICES && search_running_services_func`


#apt-get clean
apt-get -y update
apt-get -y upgrade $DPKG_OPTIONS 
apt-get -y dist-upgrade $DPKG_OPTIONS

#apache_config_func
#php5_config_func

apt-get -y install dialog locales less vim  screen tzdata debconf ssh psmisc ncurses-term   mktemp file debian-keyring  logrotate debsums debconf-utils rsyslog
sed '/imklog/s/^/#/' < /etc/rsyslog.conf > /etc/rsyslog.conf.new ; mv /etc/rsyslog.conf.new /etc/rsyslog.conf
#apt-get -y install nullmailer heirloom-mailx
apt-get clean

# stoerende Dienste deaktivieren
[ -f /etc/init.d/hwclock.sh ] && update-rc.d hwclock.sh stop 99 0 1 2 3 4 5 6 S .
[ -f /etc/init.d/checkfs.sh ] && update-rc.d checkfs.sh stop 99 0 1 2 3 4 5 6 S .


[ ! -e /dev/fd ] && ln -s /proc/self/fd /dev/fd

if $CHECK_SERVICES ; then 
	find_missing_services_func
	if [ -n "$missing_servs" ] ; then
		if $RESTART_SERVICES; then
			for s in $missing_servs; do
				[ "$s" = master ] && s=postfix
				if [ -x /etc/init.d/$s ] ; then
					/etc/init.d/$s start || true 
				elif s=${s%-*}; [ -x /etc/init.d/$s ] ; then
					/etc/init.d/$s start || true
				fi
				started_services+="$s "
			done
			find_missing_services_func
		fi
		if [ -n "$missing_servs" ] ; then
			echo  "gestoppte Dienste nach dem Upgrade: "$missing_servs
			echo  "davon versucht zu restarten: "$started_services
			exit_status=1
		fi
	fi
	new_servs=`echo "$services_diff" | grep '^>'  | cut -d' ' -f2` 
	#if [ -n "$new_servs" ] ; then
	#	echo "neu gestartete Dienste nach dem Upgrade: "$new_servs
	#	exit_status=1
	#fi
fi


exit $exit_status