OMV installation fixes

Tested on Armbian and 'foreign' Jessie and Stretch installations

softy

@@ -308,11 +308,11 @@ case $distribution in
 		;;
 esac
 
-sed -i "s/^# en_US.UTF-8/en_US.UTF-8/" /etc/locale.gen
-locale-gen
-	
-wget -qO - https://packages.openmediavault.org/public/archive.key | apt-key add -
-apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 7AA630A1EDEE7D73
+export APT_LISTCHANGES_FRONTEND=none
+if [ ! -f /etc/armbian-release ]; then
+	sed -i "s/^# en_US.UTF-8/en_US.UTF-8/" /etc/locale.gen
+	locale-gen
+fi
 
 cat > /etc/apt/sources.list.d/openmediavault.list << EOF
 deb https://openmediavault.github.io/packages/ ${OMV_Name} main
@@ -325,18 +325,27 @@ deb https://openmediavault.github.io/packages/ ${OMV_Name}-proposed main
 # deb https://openmediavault.github.io/packages/ ${OMV_Name} partner
 EOF
 
+debconf-apt-progress -- apt-get update
+apt-get --allow-unauthenticated install openmediavault-keyring
+apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 7AA630A1EDEE7D73
+
 read HOSTNAME </etc/hostname
 read TZ </etc/timezone
-debconf-apt-progress -- apt-get update
 debconf-set-selections <<< "postfix postfix/mailname string ${HOSTNAME}"
-debconf-apt-progress -- apt-get -y --allow-unauthenticated --fix-missing --no-install-recommends install openmediavault postfix
+SPACE_NEEDED=$(apt-get --assume-no --fix-missing --no-install-recommends install openmediavault postfix 2>/dev/null | awk -F" " '/additional disk space will be used/ {print $4}')
+SPACE_AVAIL=$(df -k / | awk -F" " '/\/$/ {printf ("%0.0f",$4/1200); }')
+if [ ${SPACE_AVAIL} -lt ${SPACE_NEEDED} ]; then
+	dialog --backtitle "$backtitle" --title "No space left on device" --msgbox "\nOpenMediaVault needs ${SPACE_NEEDED} MB for installation while only ${SPACE_AVAIL} MB are available." 7 52
+	exit 1
+fi
+apt-get -y --fix-missing --no-install-recommends install openmediavault postfix
 FILE=`mktemp`; wget "$OMV_EXTRAS_URL" -qO $FILE && dpkg -i $FILE; rm $FILE
 /usr/sbin/omv-update
 
 # Install flashmemory plugin and netatalk by default, use nice logo for the latter,
 # disable OMV monitoring by default
 . /usr/share/openmediavault/scripts/helper-functions
-apt-get -y -q --allow-unauthenticated install openmediavault-flashmemory openmediavault-netatalk
+apt-get -y --fix-missing --no-install-recommends --auto-remove install openmediavault-flashmemory openmediavault-netatalk
 AFP_Options="mimic model = Macmini"
 SMB_Options="min receivefile size = 16384\nwrite cache size = 524288\ngetwd cache = yes\nsocket options = TCP_NODELAY IPTOS_LOWDELAY"
 xmlstarlet ed -L -u "/config/services/afp/extraoptions" -v "$(echo -e "${AFP_Options}")" ${OMV_CONFIG_FILE}
@@ -353,15 +362,25 @@ sed -i 's|-j /var/lib/rrdcached/journal/ ||' /etc/init.d/rrdcached
 for i in netatalk samba flashmemory ssh ntp timezone monit rrdcached collectd ; do
 	/usr/sbin/omv-mkconf $i
 done
-/sbin/folder2ram -enablesystemd
+# /sbin/folder2ram -enablesystemd
 
-# Prevent accidentally destroying board performance by clicking around in OMV UI
+# Prevent accidentally destroying board performance by clicking around in OMV UI since
+# OMV sets 'powersave' governor when touching 'Power Management' settings. 
 if [ -f /etc/default/cpufrequtils ]; then
 	. /etc/default/cpufrequtils
-	echo -e "OMV_CPUFREQUTILS_GOVERNOR=${GOVERNOR}" >>/etc/default/openmediavault
-	echo -e "OMV_CPUFREQUTILS_MINSPEED=${MIN_SPEED}" >>/etc/default/openmediavault
-	echo -e "OMV_CPUFREQUTILS_MAXSPEED=${MAX_SPEED}" >>/etc/default/openmediavault
+else
+	DEFAULT_GOV="$(zgrep "^CONFIG_CPU_FREQ_DEFAULT_GOV_" /proc/config.gz 2>/dev/null | sed 's/CONFIG_CPU_FREQ_DEFAULT_GOV_//')"
+	if [ -n "${DEFAULT_GOV}" ]; then
+		GOVERNOR=$(cut -f1 -d= <<<"${DEFAULT_GOV}" | tr '[:upper:]' '[:lower:]')
+	else
+		GOVERNOR=ondemand
+	fi
+	MIN_SPEED="0"
+	MAX_SPEED="0"
 fi
+echo -e "OMV_CPUFREQUTILS_GOVERNOR=${GOVERNOR}" >>/etc/default/openmediavault
+echo -e "OMV_CPUFREQUTILS_MINSPEED=${MIN_SPEED}" >>/etc/default/openmediavault
+echo -e "OMV_CPUFREQUTILS_MAXSPEED=${MAX_SPEED}" >>/etc/default/openmediavault
 
 /usr/sbin/omv-initsystem
 check_port 80
@@ -890,9 +909,11 @@ fi
 
 # Install basic stuff
 #
-echo "First start. Checking dependencies. This might take a while."
+export LANG=C
+echo -e "\nChecking dependencies. This might take a while."
 apt-get -qq -y --no-install-recommends install debconf-utils unzip build-essential html2text apt-transport-https dialog whiptail \
 lsb-release bc expect html2text > /dev/null
+export DEBIAN_FRONTEND=noninteractive
 
 # gather some info
 #