diff --git a/board/common/mkimage.sh b/board/common/mkimage.sh
index 2e9ccedfd2..6ec4fb8c8c 100755
--- a/board/common/mkimage.sh
+++ b/board/common/mkimage.sh
@@ -28,7 +28,7 @@ GUARD_SIZE="10"  # MB
 DISK_SIZE=$((ROOT_START + ROOT_SIZE + GUARD_SIZE))
 
 COMMON_DIR=$(cd $IMG_DIR/../../../board/common; pwd)
-OS_NAME=$(source $COMMON_DIR/overlay/etc/version && echo $os_short_name)
+OS_NAME=$(source $COMMON_DIR/overlay/etc/version && echo $OS_SHORT_NAME)
 
 # boot filesystem
 msg "creating boot loop device"
@@ -73,19 +73,19 @@ tar -xpsf $ROOT_SRC -C $ROOT
 if [ -f $ROOT/etc/version ]; then
     if [ -n "$THINGOS_NAME" ]; then
         msg "setting OS name to $THINGOS_NAME"
-        sed -ri "s/os_name=\".*\"/os_name=\"$THINGOS_NAME\"/" $ROOT/etc/version
+        sed -ri "s/OS_NAME=\".*\"/OS_NAME=\"$THINGOS_NAME\"/" $ROOT/etc/version
     fi
     if [ -n "$THINGOS_SHORT_NAME" ]; then
         msg "setting OS short name to $THINGOS_SHORT_NAME"
-        sed -ri "s/os_short_name=\".*\"/os_short_name=\"$THINGOS_SHORT_NAME\"/" $ROOT/etc/version
+        sed -ri "s/OS_SHORT_NAME=\".*\"/OS_SHORT_NAME=\"$THINGOS_SHORT_NAME\"/" $ROOT/etc/version
     fi
     if [ -n "$THINGOS_PREFIX" ]; then
         msg "setting OS prefix to $THINGOS_PREFIX"
-        sed -ri "s/os_prefix=\".*\"/os_prefix=\"$THINGOS_PREFIX\"/" $ROOT/etc/version
+        sed -ri "s/OS_PREFIX=\".*\"/OS_PREFIX=\"$THINGOS_PREFIX\"/" $ROOT/etc/version
     fi
     if [ -n "$THINGOS_VERSION" ]; then
         msg "setting OS version to $THINGOS_VERSION"
-        sed -ri "s/os_version=\".*\"/os_version=\"$THINGOS_VERSION\"/" $ROOT/etc/version
+        sed -ri "s/OS_VERSION=\".*\"/OS_VERSION=\"$THINGOS_VERSION\"/" $ROOT/etc/version
     fi
 fi
 
diff --git a/board/common/overlay/etc/init.d/S00datapart b/board/common/overlay/etc/init.d/S00datapart
index f8b2747c07..7bf25bdc27 100755
--- a/board/common/overlay/etc/init.d/S00datapart
+++ b/board/common/overlay/etc/init.d/S00datapart
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-test -n "$os_version" || source /etc/init.d/base
+test -n "$OS_VERSION" || source /etc/init.d/base
 
 case "$1" in
     start)
diff --git a/board/common/overlay/etc/init.d/S01mountall b/board/common/overlay/etc/init.d/S01mountall
index 71065f714d..8354d3054c 100755
--- a/board/common/overlay/etc/init.d/S01mountall
+++ b/board/common/overlay/etc/init.d/S01mountall
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-test -n "$os_version" || source /etc/init.d/base
+test -n "$OS_VERSION" || source /etc/init.d/base
 
 mount_fs() {
     msg_begin "Mounting filesystems"
@@ -22,8 +22,8 @@ remount_rw() {
 }
 
 mk_tty_login() {
-    test -z "$os_tty_login" && os_tty_login=tty1
-    ln -sf /dev/$os_tty_login /dev/ttylogin
+    test -z "$OS_TTY_LOGIN" && OS_TTY_LOGIN=tty1
+    ln -sf /dev/$OS_TTY_LOGIN /dev/ttylogin
 }
 
 case "$1" in
@@ -31,8 +31,8 @@ case "$1" in
         mount_fs
 
         # we need to source conf again, now that /data is available
-        test -n "$os_debug" || source /etc/init.d/conf
-        test "$os_debug" == "true" && remount_rw
+        test -n "$OS_DEBUG" || source /etc/init.d/os_conf
+        test "$OS_DEBUG" == "true" && remount_rw
         mk_tty_login
         ;;
 
diff --git a/board/common/overlay/etc/init.d/S02modules b/board/common/overlay/etc/init.d/S02modules
index 685f63a5fb..4190059f95 100755
--- a/board/common/overlay/etc/init.d/S02modules
+++ b/board/common/overlay/etc/init.d/S02modules
@@ -1,20 +1,26 @@
 #!/bin/bash
 
-sys_modules_file="/etc/modules"
-modules_file="/data/etc/modules"
+SYS_MODULES_FILE="/etc/modules"
+BOOT_MODULES_FILE="/boot/modules"
+MODULES_FILE="/data/etc/modules"
 
-test -n "$os_version" || source /etc/init.d/base
+
+test -n "$OS_VERSION" || source /etc/init.d/base
 
 case "$1" in
     start)
         msg_begin "Loading kernel modules"
 
-        if [[ -r $sys_modules_file ]]; then
-            cat $sys_modules_file | while read line; do test -n "$line" && /sbin/modprobe $line &>/dev/null; done
+        if [[ -r $SYS_MODULES_FILE ]]; then
+            cat $SYS_MODULES_FILE | while read line; do test -n "$line" && /sbin/modprobe $line &>/dev/null; done
         fi
 
-        if [[ -r $modules_file ]]; then
-            cat $modules_file | while read line; do test -n "$line" && /sbin/modprobe $line &>/dev/null; done
+        if [[ -r $BOOT_MODULES_FILE ]]; then
+            cat $BOOT_MODULES_FILE | while read line; do test -n "$line" && /sbin/modprobe $line &>/dev/null; done
+        fi
+
+        if [[ -r $MODULES_FILE ]]; then
+            cat $MODULES_FILE | while read line; do test -n "$line" && /sbin/modprobe $line &>/dev/null; done
         fi
 
         msg_done
diff --git a/board/common/overlay/etc/init.d/S03hostname b/board/common/overlay/etc/init.d/S03hostname
index 8b886e838d..5660423ad9 100755
--- a/board/common/overlay/etc/init.d/S03hostname
+++ b/board/common/overlay/etc/init.d/S03hostname
@@ -1,27 +1,22 @@
 #!/bin/bash
 
-sys_hostname_file="/etc/hostname"
-boot_hostname_file="/boot/hostname"
-hostname_file="/data/etc/hostname"
+SYS_HOSTNAME_FILE="/etc/hostname"
+BOOT_HOSTNAME_FILE="/boot/hostname"
+HOSTNAME_FILE="/data/etc/hostname"
 
-test -n "$os_version" || source /etc/init.d/base
+
+test -n "$OS_VERSION" || source /etc/init.d/base
 
 case "$1" in
     start)
         msg_begin "Setting hostname"
 
-        if ! [[ -f $hostname_file ]]; then
-            if [[ -f $boot_hostname_file ]]; then
-                cp $boot_hostname_file $hostname_file
-            elif [[ -f $sys_hostname_file ]]; then
-                cp $sys_hostname_file $hostname_file
-            fi
-        fi
+        prepare_conf $HOSTNAME_FILE $SYS_HOSTNAME_FILE $BOOT_HOSTNAME_FILE
 
-        if [[ -f $hostname_file ]]; then
-            hostname=$(cat $hostname_file)
+        if [[ -f $HOSTNAME_FILE ]]; then
+            hostname=$(cat $HOSTNAME_FILE)
         else
-            hostname="$os_prefix-$board_sn"
+            hostname="$OS_PREFIX-$BOARD_SN"
         fi
 
         /bin/hostname $hostname
diff --git a/board/common/overlay/etc/init.d/S04syslog b/board/common/overlay/etc/init.d/S04syslog
index b7a1eb3ac4..7eba761d12 100755
--- a/board/common/overlay/etc/init.d/S04syslog
+++ b/board/common/overlay/etc/init.d/S04syslog
@@ -1,16 +1,17 @@
 #!/bin/bash
 
-test -n "$os_version" || source /etc/init.d/base
+test -n "$OS_VERSION" || source /etc/init.d/base
+
+DMESG_LOG="/var/log/dmesg.log"
 
-dmesg_log="/var/log/dmesg.log"
 
 case "$1" in
     start)
         msg_begin "Starting syslogd"
         syslogd
         test $? == 0 && msg_done || msg_fail
-        echo "---- booting $os_name $os_version ----" >> $dmesg_log
-        dmesg -T -w >> $dmesg_log &
+        echo "---- booting $OS_NAME $OS_VERSION ----" >> $DMESG_LOG
+        dmesg -T -w >> $DMESG_LOG &
         ;;
 
     stop)
diff --git a/board/common/overlay/etc/init.d/S12udev b/board/common/overlay/etc/init.d/S12udev
index ce1c2af7f8..73d187e397 100755
--- a/board/common/overlay/etc/init.d/S12udev
+++ b/board/common/overlay/etc/init.d/S12udev
@@ -1,10 +1,13 @@
 #!/bin/bash
 
-test -f /etc/udev/udev.conf || exit 0
+CONF=/etc/udev/udev.conf
 
-test -n "$os_version" || source /etc/init.d/base
 
-source /etc/udev/udev.conf
+test -f $CONF || exit 0
+
+test -n "$OS_VERSION" || source /etc/init.d/base
+
+source $CONF
 
 start() {
     msg_begin "Starting eudev"
diff --git a/board/common/overlay/etc/init.d/S13watchdog b/board/common/overlay/etc/init.d/S13watchdog
index 2ef0f11278..3ffe16881a 100755
--- a/board/common/overlay/etc/init.d/S13watchdog
+++ b/board/common/overlay/etc/init.d/S13watchdog
@@ -2,7 +2,7 @@
 
 test -c /dev/watchdog || exit 0
 
-test -n "$os_version" || source /etc/init.d/base
+test -n "$OS_VERSION" || source /etc/init.d/base
 
 case "$1" in
     start)
diff --git a/board/common/overlay/etc/init.d/S14postupgrade b/board/common/overlay/etc/init.d/S14postupgrade
index 65c0adf96b..4820f340af 100755
--- a/board/common/overlay/etc/init.d/S14postupgrade
+++ b/board/common/overlay/etc/init.d/S14postupgrade
@@ -1,19 +1,18 @@
 #!/bin/bash
 
-test -n "$os_version" || source /etc/init.d/base
+SYS_VERSION_FILE="/etc/version"
+VERSION_FILE="/data/etc/version"
+POST_UPGRADE_DIR="/usr/share/post-upgrade"
 
-sys_version_file="/etc/version"
-version_file="/data/etc/version"
-post_upgrade_dir="/usr/share/post-upgrade"
-sys_os_conf="/etc/os.conf"
-os_conf="/data/etc/os.conf"
 
-hash=$(md5sum $version_file 2>/dev/null | cut -d ' ' -f 1)
-sys_hash=$(md5sum $sys_version_file 2>/dev/null | cut -d ' ' -f 1)
+test -n "$OS_VERSION" || source /etc/init.d/base
+
+hash=$(md5sum $VERSION_FILE 2>/dev/null | cut -d ' ' -f 1)
+sys_hash=$(md5sum $SYS_VERSION_FILE 2>/dev/null | cut -d ' ' -f 1)
 
 test "$hash" == "$sys_hash" && exit 0
 
-test -d $post_upgrade_dir || exit 0
+test -d $POST_UPGRADE_DIR || exit 0
 
 function version_gt() {
     if [[ "$1" != "$2" ]] && [[ $(echo -e "$2\n$1" | sort -t . | head -n 1) == "$2" ]]; then
@@ -24,37 +23,24 @@ function version_gt() {
 }
 
 function run_post_upgrade() {
-    version="$(source $version_file 2>/dev/null && echo $os_version)"
-    sys_version="$(source $sys_version_file 2>/dev/null && echo $os_version)"
+    version="$(source $VERSION_FILE 2>/dev/null && echo $OS_VERSION)"
+    sys_version="$(source $SYS_VERSION_FILE 2>/dev/null && echo $OS_VERSION)"
 
-    versions=$(ls -1 $post_upgrade_dir | cut -d '.' -f 1)
+    versions=$(ls -1 $POST_UPGRADE_DIR | cut -d '.' -f 1)
     for v in $versions; do
         if [[ -z "$version" ]] || version_gt $v $version; then
             msg_begin "Post-upgrading to version $v"
-            out=$($post_upgrade_dir/$v.sh 2>&1)
+            out=$($POST_UPGRADE_DIR/$v.sh 2>&1)
             test $? == 0 && msg_done || msg_fail
             echo "$out" | logger -t post-upgrade
         fi
     done
 }
 
-function update_os_conf() {
-    source $sys_os_conf
-    sys_vars=$(cat $sys_os_conf | cut -d '=' -f 1)
-    for var in $sys_vars; do
-        if ! grep "$var=" $os_conf &>/dev/null; then
-            msg_begin "Adding $var to os.conf"
-            echo "$var=\"${!var}\"" >> $os_conf
-            msg_done
-        fi
-    done
-}
-
 case "$1" in
     start)
         run_post_upgrade
-        cp $sys_version_file $version_file
-        update_os_conf
+        cp $SYS_VERSION_FILE $VERSION_FILE
         ;;
 
     stop)
diff --git a/board/common/overlay/etc/init.d/S30dbus b/board/common/overlay/etc/init.d/S30dbus
index 946aa5271d..c6391f624d 100755
--- a/board/common/overlay/etc/init.d/S30dbus
+++ b/board/common/overlay/etc/init.d/S30dbus
@@ -1,15 +1,16 @@
 #!/bin/bash
 
-sys_btconf="/etc/bluetooth.conf"
-boot_btconf="/boot/bluetooth.conf"
-btconf="/data/etc/bluetooth.conf"
+SYS_BTCONF="/etc/bluetooth.conf"
+BOOT_BTCONF="/boot/bluetooth.conf"
+BTCONF="/data/etc/bluetooth.conf"
+
 
 # dbus is currently only used by bluez
-test -f $btconf || test -f $boot_btconf || test -f $sys_btconf || exit 0
+test -f $BTCONF || test -f $BOOT_BTCONF || test -f $SYS_BTCONF || exit 0
 
 test -x /usr/bin/dbus-daemon || exit 0
 
-test -n "$os_version" || source /etc/init.d/base
+test -n "$OS_VERSION" || source /etc/init.d/base
 
 start() {
     mkdir -p /tmp/dbus
diff --git a/board/common/overlay/etc/init.d/S33hostapd b/board/common/overlay/etc/init.d/S33hostapd
index b8d6759589..7704e31ecc 100755
--- a/board/common/overlay/etc/init.d/S33hostapd
+++ b/board/common/overlay/etc/init.d/S33hostapd
@@ -1,30 +1,25 @@
 #!/bin/bash
 
-sys_conf="/etc/hostapd.conf"
-boot_conf="/boot/hostapd.conf"
-conf="/data/etc/hostapd.conf"
+SYS_CONF="/etc/hostapd.conf"
+BOOT_CONF="/boot/hostapd.conf"
+CONF="/data/etc/hostapd.conf"
 
-log="/var/log/hostapd.log"
-prog="/usr/sbin/hostapd"
+LOG="/var/log/hostapd.log"
+PROG="/usr/sbin/hostapd"
 
-watch_conf="/data/etc/watch.conf"
+WATCH_CONF="/data/etc/watch.conf"
 
 link_watch=yes
 link_watch_timeout=20
 
-test -f $watch_conf && source $watch_conf
 
-if ! [[ -f $conf ]]; then
-    if [[ -f $boot_conf ]]; then
-        cp $boot_conf $conf
-    elif [[ -f $sys_conf ]]; then
-        cp $sys_conf $conf
-    fi
-fi
+test -n "$OS_VERSION" || source /etc/init.d/base
 
-test -f $conf || exit 0
+prepare_conf $CONF $SYS_CONF $BOOT_CONF
+test -f $CONF || exit 0
+
+test -f $WATCH_CONF && source $WATCH_CONF
 
-test -n "$os_version" || source /etc/init.d/base
 
 running() {
     killall -0 hostapd &> /dev/null
@@ -55,11 +50,11 @@ start() {
         fi
     done
 
-    iface=$(cat $conf | grep interface | cut -d '=' -f 2)
+    iface=$(cat $CONF | grep interface | cut -d '=' -f 2)
     module=$(basename $(readlink /sys/class/net/$iface/device/driver/module 2>/dev/null) 2>/dev/null)
 
     iwconfig $iface power off &> /dev/null
-    $prog $conf &> $log &
+    $PROG $CONF &> $LOG &
 
     if [[ "$link_watch" == "yes" ]]; then
         watch &
diff --git a/board/common/overlay/etc/init.d/S35wifi b/board/common/overlay/etc/init.d/S35wifi
index 7ab6635531..8dd54f2725 100755
--- a/board/common/overlay/etc/init.d/S35wifi
+++ b/board/common/overlay/etc/init.d/S35wifi
@@ -1,49 +1,35 @@
 #!/bin/bash
 
-sys_conf="/etc/wpa_supplicant.conf"
-boot_conf="/boot/wpa_supplicant.conf"
-conf="/data/etc/wpa_supplicant.conf"
+SYS_CONF="/etc/wpa_supplicant.conf"
+BOOT_CONF="/boot/wpa_supplicant.conf"
+CONF="/data/etc/wpa_supplicant.conf"
 
-log="/var/log/wpa_supplicant.log"
-prog="/usr/sbin/wpa_supplicant"
-driver=nl80211,wext
+LOG="/var/log/wpa_supplicant.log"
+PROG="/usr/sbin/wpa_supplicant"
+DRIVER=nl80211,wext
 
-sys_watch_conf="/etc/watch.conf"
-boot_watch_conf="/boot/watch.conf"
-watch_conf="/data/etc/watch.conf"
+SYS_WATCH_CONF="/etc/watch.conf"
+BOOT_WATCH_CONF="/boot/watch.conf"
+WATCH_CONF="/data/etc/watch.conf"
 
-if ! [[ -f $watch_conf ]]; then
-    if [[ -f $boot_watch_conf ]]; then
-        cp $boot_watch_conf $watch_conf
-    elif [[ -f $sys_watch_conf ]]; then
-        cp $sys_watch_conf $watch_conf
-    fi
-fi
 
-source $watch_conf
+test -n "$OS_VERSION" || source /etc/init.d/base
 
-if ! [[ -f $conf ]]; then
-    if [[ -f $boot_conf ]]; then
-        cp $boot_conf $conf
-    elif [[ -f $sys_conf ]]; then
-        cp $sys_conf $conf
-    fi
-fi
+prepare_conf $WATCH_CONF $SYS_WATCH_CONF $BOOT_WATCH_CONF
+source $WATCH_CONF
 
-test -f $conf || exit 0
+prepare_conf $CONF $SYS_CONF $BOOT_CONF
+test -f $CONF || exit 0
 
-# we want only Unix newlines here
-sed -i 's/\r//g' $conf
-
-ssid=$(cat $conf | grep ssid | grep -v scan_ssid | cut -d '"' -f 2)
+ssid=$(cat $CONF | grep ssid | grep -v scan_ssid | cut -d '"' -f 2)
 test -n "$ssid" || exit 0
 
-test -n "$os_version" || source /etc/init.d/base
 
-test "$os_networkless" == "true" && exit 0
+test "$OS_NETWORKLESS" == "true" && exit 0
+
 
 connected() {
-    ip link show dev $os_wlan 2>&1 | grep LOWER_UP &> /dev/null && return 0 || return 1
+    ip link show dev $OS_WLAN 2>&1 | grep LOWER_UP &> /dev/null && return 0 || return 1
 }
 
 watch() {
@@ -65,13 +51,13 @@ watch() {
 }
 
 start() {
-    test -n "$os_country" && iw reg set $os_country
+    test -n "$OS_COUNTRY" && iw reg set $OS_COUNTRY
 
     msg_begin "Starting wpa_supplicant"
 
     # wait up to 5 seconds for interface
     count=0
-    while ! ifconfig $os_wlan >/dev/null 2>&1; do
+    while ! ifconfig $OS_WLAN >/dev/null 2>&1; do
         sleep 1
         count=$(($count + 1))
         if [[ $count -ge 5 ]]; then
@@ -80,11 +66,11 @@ start() {
         fi
     done
     
-    module=$(basename $(readlink /sys/class/net/$os_wlan/device/driver/module 2>/dev/null) 2>/dev/null)
+    module=$(basename $(readlink /sys/class/net/$OS_WLAN/device/driver/module 2>/dev/null) 2>/dev/null)
 
-    iwconfig $os_wlan power off &> /dev/null
-    iw $os_wlan set power_save off &> /dev/null
-    $prog -i$os_wlan -c$conf -D$driver -B &> $log
+    iwconfig $OS_WLAN power off &> /dev/null
+    iw $OS_WLAN set power_save off &> /dev/null
+    $PROG -i$OS_WLAN -c$CONF -D$DRIVER -B &> $LOG
     count=0
     while true; do
         sleep 1
diff --git a/board/common/overlay/etc/init.d/S36ppp b/board/common/overlay/etc/init.d/S36ppp
index c67f7253e6..76a0484993 100755
--- a/board/common/overlay/etc/init.d/S36ppp
+++ b/board/common/overlay/etc/init.d/S36ppp
@@ -1,33 +1,29 @@
 #!/bin/bash
 
-sys_conf="/etc/ppp/default"
-boot_conf="/boot/ppp"
-conf="/data/etc/ppp"
+SYS_CONF="/etc/ppp/default"
+BOOT_CONF="/boot/ppp"
+CONF="/data/etc/ppp"
 
-prog="/usr/sbin/pppd"
-provider="mobile"
+PROG="/usr/sbin/pppd"
+PROVIDER="mobile"
 
-watch_conf="/data/etc/watch.conf"
+WATCH_CONF="/data/etc/watch.conf"
 
-source $watch_conf
 
-if ! [[ -d $conf ]]; then
-    if [[ -d $boot_conf ]]; then
-        cp -r $boot_conf $conf
-    elif [[ -d $sys_conf ]]; then
-        cp -r $sys_conf $conf
-    fi
-fi
+test -n "$OS_VERSION" || source /etc/init.d/base
 
-test -e $conf/modem || exit 0
-test -e $conf/apn || exit 0
+prepare_conf $CONF $SYS_CONF $BOOT_CONF
 
-test -n "$os_version" || source /etc/init.d/base
+test -e $CONF/modem || exit 0
+test -e $CONF/apn || exit 0
+
+source $WATCH_CONF
+
+test "$OS_NETWORKLESS" == "true" && exit 0
 
-test "$os_networkless" == "true" && exit 0
 
 connected() {
-    ifconfig | grep $os_ppp &>/dev/null && return 0 || return 1
+    ifconfig | grep $OS_PPP &>/dev/null && return 0 || return 1
 }
 
 watch() {
@@ -55,15 +51,15 @@ udev_trigger_add() {
 }
 
 start() {
-    test -e $conf/auth || touch $conf/auth
-    test -e $conf/extra || touch $conf/extra
-    test -e $conf/pin || touch $conf/pin
+    test -e $CONF/auth || touch $CONF/auth
+    test -e $CONF/extra || touch $CONF/extra
+    test -e $CONF/pin || touch $CONF/pin
     mknod /dev/ppp c 108 0 &>/dev/null
 
     msg_begin "Starting pppd"
 
     # wait for modem
-    modem=$(head -n 1 $conf/modem)
+    modem=$(head -n 1 $CONF/modem)
     if ! [[ -e /dev/$modem ]]; then
         udev_trigger_add 4 &
     fi
@@ -83,7 +79,7 @@ start() {
         return
     fi
 
-    $prog call $provider
+    $PROG call $PROVIDER
     count=0
     while true; do
         sleep 1
diff --git a/board/common/overlay/etc/init.d/S37bluetooth b/board/common/overlay/etc/init.d/S37bluetooth
index 76e570ab00..7b1a1b56d9 100755
--- a/board/common/overlay/etc/init.d/S37bluetooth
+++ b/board/common/overlay/etc/init.d/S37bluetooth
@@ -1,18 +1,14 @@
 #!/bin/bash
 
-sys_conf="/etc/bluetooth.conf"
-boot_conf="/boot/bluetooth.conf"
-conf="/data/etc/bluetooth.conf"
+SYS_CONF="/etc/bluetooth.conf"
+BOOT_CONF="/boot/bluetooth.conf"
+CONF="/data/etc/bluetooth.conf"
 
-if ! [[ -f $conf ]]; then
-    if [[ -f $boot_conf ]]; then
-        cp $boot_conf $conf
-    elif [[ -f $sys_conf ]]; then
-        cp $sys_conf $conf
-    fi
-fi
 
-test -f $conf || exit 0
+test -n "$OS_VERSION" || source /etc/init.d/base
+
+prepare_conf $CONF $SYS_CONF $BOOT_CONF
+test -f $CONF || exit 0
 
 hci=hci0
 bluetoothd=/usr/libexec/bluetooth/bluetoothd
@@ -22,12 +18,11 @@ run_conf=/var/lib/bluetooth.conf
 
 test -x $bluetoothd || exit 0
 
-test -n "$os_version" || source /etc/init.d/base
 
 configure() {
     mkdir -p $run_data_dir
     ln -sf $run_data_dir $data_dir
-    cp $conf $run_conf
+    cp $CONF $run_conf
 
     # if no specific name configured, use hostname
     if ! grep -E 'Name\s*=' $run_conf &>/dev/null; then
diff --git a/board/common/overlay/etc/init.d/S40network b/board/common/overlay/etc/init.d/S40network
index 93b03c81af..060662bd86 100755
--- a/board/common/overlay/etc/init.d/S40network
+++ b/board/common/overlay/etc/init.d/S40network
@@ -1,33 +1,29 @@
 #!/bin/bash
 
+DH_CONF="/var/cache/dhclient.conf"
+SYS_STATIC_CONF="/etc/static_ip.conf"
+BOOT_STATIC_CONF="/boot/static_ip.conf"
+STATIC_CONF="/data/etc/static_ip.conf"
+WATCH_CONF="/data/etc/watch.conf"
+
+LINK_NEGO_TIMEOUT=10
+
+
+test -n "$OS_VERSION" || source /etc/init.d/base
+
+source $WATCH_CONF
+
+prepare_conf $STATIC_CONF $SYS_STATIC_CONF $BOOT_STATIC_CONF
+test -r $STATIC_CONF && source $STATIC_CONF
+
 mkdir -p /var/lib/dhcp
-dh_conf="/var/cache/dhclient.conf"
-sys_static_conf="/etc/static_ip.conf"
-boot_static_conf="/boot/static_ip.conf"
-static_conf="/data/etc/static_ip.conf"
-watch_conf="/data/etc/watch.conf"
 
-link_nego_timeout=10
-
-source $watch_conf
-
-if ! [[ -f $static_conf ]]; then
-    if [[ -f $boot_static_conf ]]; then
-        cp $boot_static_conf $static_conf
-    elif [[ -f $sys_static_conf ]]; then
-        cp $sys_static_conf $static_conf
-    fi
-fi
-
-test -r $static_conf && source $static_conf
-
-test -n "$os_version" || source /etc/init.d/base
 
 watch_eth() {
     count=0
     while true; do
         sleep 5
-        if [[ "$(cat /sys/class/net/$os_eth/operstate 2>/dev/null)" == "up" ]]; then
+        if [[ "$(cat /sys/class/net/$OS_ETH/operstate 2>/dev/null)" == "up" ]]; then
             count=0
         else
             if [[ $count -lt $link_watch_timeout ]]; then
@@ -66,31 +62,31 @@ start_lo() {
 
 start_wlan() {
     msg_begin "Configuring wireless network"
-    if ! ifconfig $os_wlan &>/dev/null; then
+    if ! ifconfig $OS_WLAN &>/dev/null; then
         msg_fail "no device"
         return 1
     fi
 
-    if [[ "$(cat /sys/class/net/$os_wlan/carrier 2>/dev/null)" != "1" ]]; then
+    if [[ "$(cat /sys/class/net/$OS_WLAN/carrier 2>/dev/null)" != "1" ]]; then
         msg_fail "no link"
         return 1
     fi
 
     if [[ -n "$mtu" ]]; then
-        ip link set mtu $mtu dev $os_wlan
+        ip link set mtu $mtu dev $OS_WLAN
     fi
 
     if [[ -n "$static_ip" ]]; then
         msg_done $static_ip
-        ifconfig $os_wlan $static_ip up
+        ifconfig $OS_WLAN $static_ip up
         static_ip="" # won't be used again
     else
         msg_done dhcp
-        dhclient -cf "$dh_conf" $os_wlan
+        dhclient -cf "$DH_CONF" $OS_WLAN
     fi
 
-    if [[ "$ip_watch" == "true" ]] && ip addr show dev $os_wlan | grep inet &>/dev/null; then
-        watch_ip $os_wlan &
+    if [[ "$ip_watch" == "true" ]] && ip addr show dev $OS_WLAN | grep inet &>/dev/null; then
+        watch_ip $OS_WLAN &
     fi
 }
 
@@ -100,7 +96,7 @@ start_eth() {
     # wait for driver
     w=3
     count=0
-    while ! ifconfig $os_eth >/dev/null 2>&1; do
+    while ! ifconfig $OS_ETH >/dev/null 2>&1; do
         sleep 1
         count=$(($count + 1))
         if [[ $count -ge $w ]]; then
@@ -110,12 +106,12 @@ start_eth() {
     done
 
     # bring it up
-    ifconfig $os_eth up
+    ifconfig $OS_ETH up
 
     # wait for operstate
     w=3
     count=0
-    while [[ "$(cat /sys/class/net/$os_eth/operstate 2>&1)" == "unknown" ]]; do
+    while [[ "$(cat /sys/class/net/$OS_ETH/operstate 2>&1)" == "unknown" ]]; do
         sleep 1
         count=$(($count + 1))
         if [[ $count -ge $w ]]; then
@@ -125,36 +121,36 @@ start_eth() {
     done
 
     # wait for link
-    test "$link_watch" == "true" || link_nego_timeout=5
+    test "$link_watch" == "true" || LINK_NEGO_TIMEOUT=5
     count=0
-    while [[ "$(cat /sys/class/net/$os_eth/carrier 2>&1)" != "1" ]]; do
+    while [[ "$(cat /sys/class/net/$OS_ETH/carrier 2>&1)" != "1" ]]; do
         sleep 1
         count=$(($count + 1))
-        if [[ $count -ge $link_nego_timeout ]]; then
+        if [[ $count -ge $LINK_NEGO_TIMEOUT ]]; then
             msg_done "no link"
             return 1
         fi
     done
     
     if [[ -n "$mtu" ]]; then
-        ip link set mtu $mtu dev $os_eth
+        ip link set mtu $mtu dev $OS_ETH
     fi
 
     if [[ -n "$static_ip" ]]; then
         msg_done $static_ip
-        ifconfig $os_eth $static_ip up
+        ifconfig $OS_ETH $static_ip up
         static_ip="" # won't be used again
     else
         msg_done dhcp
-        dhclient -cf "$dh_conf" $os_eth
+        dhclient -cf "$DH_CONF" $OS_ETH
     fi
 
     if [[ "$link_watch" == "true" ]]; then
         watch_eth &
     fi
 
-    if [[ "$ip_watch" == "true" ]] && ip addr show dev $os_eth | grep inet &>/dev/null; then
-        watch_ip $os_eth &
+    if [[ "$ip_watch" == "true" ]] && ip addr show dev $OS_ETH | grep inet &>/dev/null; then
+        watch_ip $OS_ETH &
     fi
 }
 
@@ -164,12 +160,12 @@ start() {
 
     start_lo
 
-    test "$os_networkless" == "true" && return 0
+    test "$OS_NETWORKLESS" == "true" && return 0
 
     ssid=$(cat /data/etc/wpa_supplicant.conf 2>&1 | grep ssid | grep -v scan_ssid | cut -d '"' -f 2)
     test -n "$ssid" && start_wlan && wlan_ok="ok"
     
-    test -r /data/etc/ppp/modem && ifconfig | grep $os_ppp &>/dev/null && ppp_ok="ok"
+    test -r /data/etc/ppp/modem && ifconfig | grep $OS_PPP &>/dev/null && ppp_ok="ok"
     
     # if wifi or ppp link ok, start eth in background
     if [[ "$wlan_ok" == "ok" ]] || [[ "$ppp_ok" == "ok" ]]; then
diff --git a/board/common/overlay/etc/init.d/S41netwatch b/board/common/overlay/etc/init.d/S41netwatch
index a7bd496f32..ef2d743d97 100755
--- a/board/common/overlay/etc/init.d/S41netwatch
+++ b/board/common/overlay/etc/init.d/S41netwatch
@@ -1,29 +1,31 @@
 #!/bin/bash
 
-watch_conf="/data/etc/watch.conf"
-netwatch_retries=3
-netwatch_timeout=5
-netwatch_interval=20
+WATCH_CONF="/data/etc/watch.conf"
+NETWATCH_RETRIES=3
+NETWATCH_TIMEOUT=5
+NETWATCH_INTERVAL=20
 
-test -f $watch_conf && source $watch_conf || exit 0
 
-if [[ -z "$netwatch_host" ]] || [[ -z "$netwatch_port" ]]; then
+test -f $WATCH_CONF && source $WATCH_CONF || exit 0
+
+if [[ -z "$netwatch_host" || -z "$netwatch_port" ]]; then
     exit 0
 fi
 
-test -n "$os_version" || source /etc/init.d/base
+test -n "$OS_VERSION" || source /etc/init.d/base
+
+test "$OS_NETWORKLESS" == "true" && exit 0
 
-test "$os_networkless" == "true" && exit 0
 
 watch() {
     count=0
-    netwatch_retries=$(($netwatch_retries - 1))
+    NETWATCH_RETRIES=$(($NETWATCH_RETRIES - 1))
     while true; do
-        sleep $netwatch_interval
-        if nc -z -w $netwatch_timeout $netwatch_host $netwatch_port </dev/null >/dev/null 2>&1; then
+        sleep $NETWATCH_INTERVAL
+        if nc -z -w $NETWATCH_TIMEOUT $netwatch_host $netwatch_port </dev/null >/dev/null 2>&1; then
             count=0
         else
-            if [[ $count -lt $netwatch_retries ]]; then
+            if [[ $count -lt $NETWATCH_RETRIES ]]; then
                 logger -t netwatch -s "cannot connect to $netwatch_host:$netwatch_port"
                 count=$(($count + 1))
                 continue
diff --git a/board/common/overlay/etc/init.d/S43firewall b/board/common/overlay/etc/init.d/S43firewall
index 3e049c18d8..cdd700d9ad 100755
--- a/board/common/overlay/etc/init.d/S43firewall
+++ b/board/common/overlay/etc/init.d/S43firewall
@@ -1,25 +1,19 @@
 #!/bin/bash
 
-sys_conf="/etc/firewall.sh"
-boot_conf="/boot/firewall.sh"
-conf="/data/etc/firewall.sh"
+SYS_CONF="/etc/firewall.sh"
+BOOT_CONF="/boot/firewall.sh"
+CONF="/data/etc/firewall.sh"
 
-if ! [[ -f $conf ]]; then
-    if [[ -f $boot_conf ]]; then
-        cp $boot_conf $conf
-    elif [[ -f $sys_conf ]]; then
-        cp $sys_conf $conf
-    fi
-fi
 
-test -f $conf || exit 0
+test -n "$OS_VERSION" || source /etc/init.d/base
 
-test -n "$os_version" || source /etc/init.d/base
+prepare_conf $CONF $SYS_CONF $BOOT_CONF
+test -f $CONF || exit 0
 
 start() {
     msg_begin "Starting firewall"
 
-    bash $conf  
+    bash $CONF  
 
     test $? == 0 && msg_done || msg_fail
 }
diff --git a/board/common/overlay/etc/init.d/S45dnsmasq b/board/common/overlay/etc/init.d/S45dnsmasq
index e6c7c3ffed..419964cd49 100755
--- a/board/common/overlay/etc/init.d/S45dnsmasq
+++ b/board/common/overlay/etc/init.d/S45dnsmasq
@@ -1,33 +1,28 @@
 #!/bin/bash
 
-sys_conf="/etc/dnsmasq.conf"
-boot_conf="/boot/dnsmasq.conf"
-conf="/data/etc/dnsmasq.conf"
+SYS_CONF="/etc/dnsmasq.conf"
+BOOT_CONF="/boot/dnsmasq.conf"
+CONF="/data/etc/dnsmasq.conf"
 
-log="/var/log/dnsmasq.log"
-prog="/usr/sbin/dnsmasq"
+LOG="/var/log/dnsmasq.log"
+PROG="/usr/sbin/dnsmasq"
 
-if ! [[ -f $conf ]]; then
-    if [[ -f $boot_conf ]]; then
-        cp $boot_conf $conf
-    elif [[ -f $sys_conf ]]; then
-        cp $sys_conf $conf
-    fi
-fi
 
-test -f $conf || exit 0
+test -n "$OS_VERSION" || source /etc/init.d/base
+
+prepare_conf $CONF $SYS_CONF $BOOT_CONF
+test -f $CONF || exit 0
 
-test -n "$os_version" || source /etc/init.d/base
 
 start() {
     msg_begin "Starting dnsmasq"
     
-    iface=$(cat $conf | grep interface | cut -d '=' -f 2)
-    ip=$(cat $conf | grep range | cut -d '=' -f 2 | cut -d '.' -f 1,2,3).1
+    iface=$(cat $CONF | grep interface | cut -d '=' -f 2)
+    ip=$(cat $CONF | grep range | cut -d '=' -f 2 | cut -d '.' -f 1,2,3).1
     
     ifconfig $iface $ip
 
-    $prog -C $conf --log-facility=$log
+    $PROG -C $CONF --log-facility=$LOG
 
     test $? == 0 && msg_done || msg_fail
 }
diff --git a/board/common/overlay/etc/init.d/S50date b/board/common/overlay/etc/init.d/S50date
index 0390037222..941e741f4d 100755
--- a/board/common/overlay/etc/init.d/S50date
+++ b/board/common/overlay/etc/init.d/S50date
@@ -1,60 +1,49 @@
 #!/bin/bash
 
 # Date executable points to /bin/busybox\ date explicitly in the cases that date binary gets overwritten
-date_exec=/bin/busybox\ date
+DATE_PROG=/bin/busybox\ date
 
-sys_conf="/etc/date.conf"
-boot_conf="/boot/date.conf"
-conf="/data/etc/date.conf"
+SYS_CONF="/etc/date.conf"
+BOOT_CONF="/boot/date.conf"
+CONF="/data/etc/date.conf"
 
-sys_ntp_conf="/etc/ntp.conf"
-boot_ntp_conf="/boot/ntp.conf"
-ntp_conf="/data/etc/ntp.conf"
+SYS_NTP_CONF="/etc/ntp.conf"
+BOOT_NTP_CONF="/boot/ntp.conf"
+NTP_CONF="/data/etc/ntp.conf"
 
-if ! [[ -f $conf ]]; then
-    if [[ -f $boot_conf ]]; then
-        cp $boot_conf $conf
-    elif [[ -f $sys_conf ]]; then
-        cp $sys_conf $conf
-    fi
-fi
 
-if ! [[ -f $ntp_conf ]]; then
-    if [[ -f $boot_ntp_conf ]]; then
-        cp $boot_ntp_conf $ntp_conf
-    elif [[ -f $sys_ntp_conf ]]; then
-        cp $sys_ntp_conf $ntp_conf
-    fi
-fi
+test -n "$OS_VERSION" || source /etc/init.d/base
 
-test -f $conf || exit 0
+prepare_conf $CONF $SYS_CONF $BOOT_CONF
+prepare_conf $NTP_CONF $SYS_NTP_CONF $BOOT_NTP_CONF
 
-test -n "$os_version" || source /etc/init.d/base
+test -f $CONF || exit 0
 
-test "$os_networkless" == "true" && exit 0
+test "$OS_NETWORKLESS" == "true" && exit 0
 
 date_timeout=10
 date_method=http
 date_host="google.com"
 date_interval="900"
 
-source $conf
+source $CONF
+
 
 set_current_date_http() {
     date_str=$(curl -v -s -m $date_timeout -X GET http://$date_host 2>&1 | grep Date | sed -e 's/< Date: //')
     test -z "$date_str" && return 1
-    $date_exec -u -D "%a, %d %b %Y %H:%M:%S" -s "$date_str" > /dev/null
+    $DATE_PROG -u -D "%a, %d %b %Y %H:%M:%S" -s "$date_str" > /dev/null
     return $?
 }
 
 set_current_date_ntp() {
-    cat $ntp_conf | grep server | head -n 1 | cut -d ' ' -f 2 | xargs ntpdate -t $date_timeout -s
+    cat $NTP_CONF | grep server | head -n 1 | cut -d ' ' -f 2 | xargs ntpdate -t $date_timeout -s
 }
 
 start_http() {
     msg_begin "Setting current date using http"
     set_current_date_http || set_current_date_http
-    test $? == 0 && msg_done "$($date_exec)" || msg_fail
+    test $? == 0 && msg_done "$($DATE_PROG)" || msg_fail
     
     msg_begin "Starting http date updater"
     while true; do
@@ -67,23 +56,23 @@ start_http() {
 start_ntp() {
     mkdir -p /var/lib/ntp
 
-    cat $ntp_conf | grep -v iburst > ${ntp_conf}.tmp
+    cat $NTP_CONF | grep -v iburst > ${NTP_CONF}.tmp
 
     if [[ -n "$date_ntp_server" ]]; then
-        echo "server $date_ntp_server iburst" > $ntp_conf
+        echo "server $date_ntp_server iburst" > $NTP_CONF
     else
-        cat $sys_ntp_conf | grep iburst > $ntp_conf
+        cat $SYS_NTP_CONF | grep iburst > $NTP_CONF
     fi
 
-    cat ${ntp_conf}.tmp >> $ntp_conf
-    rm ${ntp_conf}.tmp
+    cat ${NTP_CONF}.tmp >> $NTP_CONF
+    rm ${NTP_CONF}.tmp
 
     msg_begin "Setting current date using ntp"
     set_current_date_ntp || set_current_date_ntp
-    test $? == 0 && msg_done "$($date_exec)" || msg_fail
+    test $? == 0 && msg_done "$($DATE_PROG)" || msg_fail
 
     msg_begin "Starting ntpd"
-    ntpd -g -c $ntp_conf
+    ntpd -g -c $NTP_CONF
     test $? == 0 && msg_done || msg_fail
 }
 
@@ -106,7 +95,7 @@ start() {
         start_ntp
     fi
 
-    echo "system date is $($date_exec '+%Y-%m-%d %H:%M:%S')" > /dev/kmsg
+    echo "system date is $($DATE_PROG '+%Y-%m-%d %H:%M:%S')" > /dev/kmsg
 }
 
 stop() {
diff --git a/board/common/overlay/etc/init.d/S51crond b/board/common/overlay/etc/init.d/S51crond
index 618b482e12..b825a52453 100755
--- a/board/common/overlay/etc/init.d/S51crond
+++ b/board/common/overlay/etc/init.d/S51crond
@@ -1,19 +1,19 @@
 #!/bin/bash
 
-sys_conf="/etc/crontabs"
-conf="/data/etc/crontabs"
+SYS_CONF="/etc/crontabs"
+CONF="/data/etc/crontabs"
 
-test -n "$os_version" || source /etc/init.d/base
+test -n "$OS_VERSION" || source /etc/init.d/base
 
 start() {
     msg_begin "Starting crond"
     
-    if [[ -d $sys_conf ]];  then
-        /usr/sbin/crond -c $sys_conf
+    if [[ -d $SYS_CONF ]];  then
+        /usr/sbin/crond -c $SYS_CONF
     fi
 
-    mkdir -p $conf
-    /usr/sbin/crond -c $conf
+    mkdir -p $CONF
+    /usr/sbin/crond -c $CONF
 
     test $? == 0 && msg_done || msg_fail
 }
diff --git a/board/common/overlay/etc/init.d/S60sshd b/board/common/overlay/etc/init.d/S60sshd
index 2dcd04ac7b..04db9febcd 100755
--- a/board/common/overlay/etc/init.d/S60sshd
+++ b/board/common/overlay/etc/init.d/S60sshd
@@ -1,12 +1,12 @@
 #!/bin/bash
 
-conf="/etc/sshd_config"
+CONF="/etc/sshd_config"
 
-test -f $conf || exit 0
+test -f $CONF || exit 0
 
-test -n "$os_version" || source /etc/init.d/base
+test -n "$OS_VERSION" || source /etc/init.d/base
 
-test "$os_networkless" == "true" && exit 0
+test "$OS_NETWORKLESS" == "true" && exit 0
 
 start() {
     msg_begin "Starting sshd"
@@ -22,7 +22,7 @@ start() {
     echo "Welcome to $hostname!" > /var/cache/sshd_banner
     sync
 
-    /usr/sbin/sshd -f $conf
+    /usr/sbin/sshd -f $CONF
     test $? == 0 && msg_done || msg_fail
 }
 
diff --git a/board/common/overlay/etc/init.d/S98userinit b/board/common/overlay/etc/init.d/S98userinit
index ffaf1dfb10..1b3f861e50 100755
--- a/board/common/overlay/etc/init.d/S98userinit
+++ b/board/common/overlay/etc/init.d/S98userinit
@@ -1,15 +1,16 @@
 #!/bin/bash
 
-userinit_sh="/data/etc/userinit.sh"
+USERINIT="/data/etc/userinit.sh"
 
-test -f $userinit_sh || exit 0
 
-test -n "$os_version" || source /etc/init.d/base
+test -f $USERINIT || exit 0
+
+test -n "$OS_VERSION" || source /etc/init.d/base
 
 case "$1" in
     start)
         msg_begin "Executing user init script"
-        /bin/bash $userinit_sh
+        /bin/bash $USERINIT
         test $? == 0 && msg_done || msg_fail
         ;;
 
diff --git a/board/common/overlay/etc/init.d/S99showinfo b/board/common/overlay/etc/init.d/S99showinfo
index fac00a387d..65862148da 100755
--- a/board/common/overlay/etc/init.d/S99showinfo
+++ b/board/common/overlay/etc/init.d/S99showinfo
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-test -n "$os_version" || source /etc/init.d/base
+test -n "$OS_VERSION" || source /etc/init.d/base
 
 msg_info() {
     echo " # $1"
@@ -24,9 +24,9 @@ show_dns() {
 
 case "$1" in
     start)
-        show_iface_ip_addr $os_eth
-        show_iface_ip_addr $os_wlan
-        show_iface_ip_addr $os_ppp
+        show_iface_ip_addr $OS_ETH
+        show_iface_ip_addr $OS_WLAN
+        show_iface_ip_addr $OS_PPP
         show_gateway
         show_dns
         ;;
diff --git a/board/common/overlay/etc/init.d/base b/board/common/overlay/etc/init.d/base
old mode 100755
new mode 100644
index 7b08c9384d..1d262a6e7c
--- a/board/common/overlay/etc/init.d/base
+++ b/board/common/overlay/etc/init.d/base
@@ -1,13 +1,13 @@
-#!/bin/bash
 
 source /etc/version
-board_sn=$(/etc/init.d/boardsn)
-board_name=$(cat /etc/board)
+BOARD_SN=$(/etc/init.d/boardsn)
+BOARD_NAME=$(cat /etc/board)
 
-test -n "$os_debug" || source /etc/init.d/conf
+test -n "$OS_DEBUG" || source /etc/init.d/os_conf
 
 source /etc/init.d/panic
 
+
 msg_begin() {
     echo -n " * $1: "
 }
@@ -24,3 +24,37 @@ msg_background() {
     test -n "$1" && echo $1 || echo "pending"
 }
 
+prepare_conf() {
+    # $1 - actual config file
+    # $2 - system-provided config file
+    # $3 - user-provided config file
+    
+    # long story short:
+    #  * user conf file takes precedence, if present
+    #  * system conf file is used by default, if actual file absent
+    
+    actual_conf="$1"
+    system_conf="$2"
+    user_conf="$3"
+    
+    if [[ -n "$user_conf" && -e "$user_conf" ]]; then
+        cp -rf "$user_conf" "$actual_conf"
+        grep -E "/boot .*ro[\s,]" /proc/mounts &>/dev/null
+        RO=$?
+        test $RO == 0 && mount -o remount,rw /boot
+        rm -rf $user_conf
+        test $RO == 0 && mount -o remount,ro /boot
+    fi
+
+    if [[ ! -e "$actual_conf" && -e "$system_conf" ]]; then
+        cp "$system_conf" "$actual_conf"
+    fi
+
+    # we want only Unix newlines in conf files
+    if [[ -f "$actual_conf" ]]; then
+        sed -i 's/\r//g' "$actual_conf"
+    elif [[ -d "$actual_conf" ]]; then
+        find "$actual_conf" -type f | xargs -L1 sed -i 's/\r//g'
+    fi
+}
+
diff --git a/board/common/overlay/etc/init.d/bootdone b/board/common/overlay/etc/init.d/bootdone
index 14ca681cfc..38e16f566b 100755
--- a/board/common/overlay/etc/init.d/bootdone
+++ b/board/common/overlay/etc/init.d/bootdone
@@ -3,5 +3,5 @@
 source /etc/init.d/panic
 
 # reset panic counter after a successful boot
-echo 0 > ${_PANIC_COUNTER_FILE}
+echo 0 > ${PANIC_COUNTER_FILE}
 
diff --git a/board/common/overlay/etc/init.d/conf b/board/common/overlay/etc/init.d/conf
deleted file mode 100644
index 46ab1a6378..0000000000
--- a/board/common/overlay/etc/init.d/conf
+++ /dev/null
@@ -1,29 +0,0 @@
-#!/bin/bash
-
-_sys_conf="/etc/os.conf"
-_boot_conf="/boot/os.conf"
-_conf="/data/etc/os.conf"
-
-if ! [[ -d /data/etc ]]; then
-    # use boot/system variants if we don't have the data partition mounted
-    if [[ -f $_boot_conf ]]; then
-        source $_boot_conf
-    elif [[ -f $_sys_conf ]]; then
-        source $_sys_conf
-    fi
-
-    return
-fi
-
-if ! [[ -f $_conf ]]; then
-    if [[ -f $_boot_conf ]]; then
-        cp $_boot_conf $_conf
-    elif [[ -f $_sys_conf ]]; then
-        cp $_sys_conf $_conf
-    fi
-fi
-
-if [[ -f $_conf ]]; then
-    source $_conf
-fi
-
diff --git a/board/common/overlay/etc/init.d/os_conf b/board/common/overlay/etc/init.d/os_conf
new file mode 100644
index 0000000000..8d5f011674
--- /dev/null
+++ b/board/common/overlay/etc/init.d/os_conf
@@ -0,0 +1,21 @@
+
+sys_conf="/etc/os.conf"
+boot_conf="/boot/os.conf"
+data_conf="/data/etc/os.conf"
+
+
+# source in all conf files in order of precedence
+if [[ -f $sys_conf ]]; then
+    source $sys_conf
+fi
+
+if [[ -f $data_conf ]]; then
+    source $data_conf
+fi
+
+if [[ -f $boot_conf ]]; then
+    source $boot_conf
+fi
+
+unset sys_conf boot_conf data_conf
+
diff --git a/board/common/overlay/etc/init.d/panic b/board/common/overlay/etc/init.d/panic
old mode 100755
new mode 100644
index fcf6724e54..4c6c992c20
--- a/board/common/overlay/etc/init.d/panic
+++ b/board/common/overlay/etc/init.d/panic
@@ -1,20 +1,19 @@
-#!/bin/bash
 
-_PANIC_COUNTER_FILE="/var/lib/panic_counter"
-_PANIC_REBOOT_DELAY_FACTOR=10
-_PANIC_REBOOT_DELAY_MAX=3600  # reboot at least once an hour in case of panic
+PANIC_COUNTER_FILE="/var/lib/panic_counter"
+PANIC_REBOOT_DELAY_FACTOR=10
+PANIC_REBOOT_DELAY_MAX=3600  # reboot at least once an hour in case of panic
 
 
 panic_action() {
     # read counter from file
-    panic_counter=$(cat ${_PANIC_COUNTER_FILE} 2>/dev/null || echo 0)
+    panic_counter=$(cat ${PANIC_COUNTER_FILE} 2>/dev/null || echo 0)
     
     # write increased counter back to file
-    echo $((panic_counter + 1)) > ${_PANIC_COUNTER_FILE}
+    echo $((panic_counter + 1)) > ${PANIC_COUNTER_FILE}
     
-    delay=$((_PANIC_REBOOT_DELAY_FACTOR * panic_counter))
-    if [[ "${delay}" -gt "${_PANIC_REBOOT_DELAY_MAX}" ]]; then
-        delay=${_PANIC_REBOOT_DELAY_MAX}
+    delay=$((PANIC_REBOOT_DELAY_FACTOR * panic_counter))
+    if [[ "${delay}" -gt "${PANIC_REBOOT_DELAY_MAX}" ]]; then
+        delay=${PANIC_REBOOT_DELAY_MAX}
     fi
     
     if [[ "${delay}" -gt 0 ]]; then
diff --git a/board/common/overlay/etc/init.d/rcK b/board/common/overlay/etc/init.d/rcK
index 7d08910c5b..e56f000d5d 100755
--- a/board/common/overlay/etc/init.d/rcK
+++ b/board/common/overlay/etc/init.d/rcK
@@ -5,7 +5,7 @@ pid_file=/tmp/rc.pid
 
 source /etc/init.d/base
 
-echo "---- shutting down $os_name $os_version ----" >> $boot_log
+echo "---- shutting down $OS_NAME $OS_VERSION ----" >> $boot_log
 
 # stop all init scripts in /etc/init.d,
 # executing them in reverse numerical order.
diff --git a/board/common/overlay/etc/init.d/rcS b/board/common/overlay/etc/init.d/rcS
index d15157610f..f4b0dab1b6 100755
--- a/board/common/overlay/etc/init.d/rcS
+++ b/board/common/overlay/etc/init.d/rcS
@@ -6,7 +6,7 @@ pid_file=/tmp/rc.pid
 
 source /etc/init.d/base
 
-echo "---- booting $os_name $os_version ----" >> $tmp_boot_log
+echo "---- booting $OS_NAME $OS_VERSION ----" >> $tmp_boot_log
 
 # start all init scripts in /etc/init.d,
 # executing them in numerical order.
diff --git a/board/common/overlay/etc/os.conf b/board/common/overlay/etc/os.conf
index 56f584fbd9..6c759e1e75 100644
--- a/board/common/overlay/etc/os.conf
+++ b/board/common/overlay/etc/os.conf
@@ -1,12 +1,12 @@
-os_debug="false"
-os_prereleases="false"
-os_tty_login="tty1"
-os_eth="eth0"
-os_wlan="wlan0"
-os_ppp="ppp0"
-os_networkless="false"
-os_country="GB"
-os_firmware_method="github"
-os_firmware_repo="ccrisan/motioneyeos"
-os_firmware_username=""
-os_firmware_password=""
+OS_DEBUG="false"
+OS_PRERELEASES="false"
+OS_TTY_LOGIN="tty1"
+OS_ETH="eth0"
+OS_WLAN="wlan0"
+OS_PPP="ppp0"
+OS_NETWORKLESS="false"
+OS_COUNTRY="GB"
+OS_FIRMWARE_METHOD="github"
+OS_FIRMWARE_REPO="ccrisan/motioneyeos"
+OS_FIRMWARE_USERNAME=""
+OS_FIRMWARE_PASSWORD=""
diff --git a/board/common/overlay/etc/version b/board/common/overlay/etc/version
index bb599ad14e..140cdc1f3f 100644
--- a/board/common/overlay/etc/version
+++ b/board/common/overlay/etc/version
@@ -1,4 +1,4 @@
-os_name="motionEyeOS"
-os_short_name="motioneyeos"
-os_prefix="meye"
-os_version="unknown"
+OS_NAME="motionEyeOS"
+OS_SHORT_NAME="motioneyeos"
+OS_PREFIX="meye"
+OS_VERSION="unknown"
diff --git a/board/common/overlay/sbin/fwupdate b/board/common/overlay/sbin/fwupdate
index adb7c4be0d..a383615700 100755
--- a/board/common/overlay/sbin/fwupdate
+++ b/board/common/overlay/sbin/fwupdate
@@ -4,14 +4,14 @@
 #### usage ####
 
 function exit_usage() {
-    echo "Usage: fwupdate versions [-j]             (lists available versions, optionally outputting json)"
-    echo "       fwupdate current                   (shows the current version"
-    echo "       fwupdate download <version|url>    (downloads a firmware version)"
-    echo "       fwupdate extract                   (extracts the downloaded firmware archive)"
-    echo "       fwupdate flashboot                 (flashes the boot partition from extracted image)"
-    echo "       fwupdate flashreboot               (prepares for reboot + root partititon flash)"
-    echo "       fwupdate status                    (shows the current firmware updating status; see below)"
-    echo "       fwupdate upgrade <version|url>     (performs all the operations necessary for upgrading)"
+    echo "Usage: fwupdate versions [-j]                 (lists available versions, optionally outputting json)"
+    echo "       fwupdate current                       (shows the current version"
+    echo "       fwupdate download <version|url|file>   (downloads a firmware version)"
+    echo "       fwupdate extract                       (extracts the downloaded firmware archive)"
+    echo "       fwupdate flashboot                     (flashes the boot partition from extracted image)"
+    echo "       fwupdate flashreboot                   (prepares for reboot + root partititon flash)"
+    echo "       fwupdate status                        (shows the current firmware updating status; see below)"
+    echo "       fwupdate upgrade <version|url|file>    (performs all the operations necessary for upgrading)"
     echo ""
     echo "Statuses:"
     echo "       idle"
@@ -35,7 +35,6 @@ fi
 
 SYS_VERSION_FILE=/etc/version
 SYS_BOARD_FILE=/etc/board
-OS_CONF=/data/etc/os.conf
 
 MIN_FREE_DISK=$((500*1024))  # 500 MB
 VER_FILE=version
@@ -78,21 +77,22 @@ fi
 #### versions ####
 
 function show_versions() {
-    source $OS_CONF
+    source /etc/init.d/os_conf  # we need this for the OS_ vars
+    
     board=$(cat $SYS_BOARD_FILE)
     show_json=$1
   
     # the /usr/libexec/list-versions-* helpers return a table with the following format:
     #     <version>|<prerelease>|<board>|<url>|<date>
-    versions=$(FW_USERNAME=$os_firmware_username FW_PASSWORD=$os_firmware_password \
-               /usr/libexec/list-versions-$os_firmware_method $os_firmware_repo)
+    versions=$(FW_USERNAME=$OS_FIRMWARE_USERNAME FW_PASSWORD=$OS_FIRMWARE_PASSWORD \
+               /usr/libexec/list-versions-$OS_FIRMWARE_METHOD $OS_FIRMWARE_REPO)
 
     for version in ${versions[@]}; do
         OIFS=$IFS
         IFS="|"
         varr=($version)
         IFS=$OIFS
-        if [ "$os_prereleases" == "false" ] && [ "${varr[1]}" == "true" ]; then
+        if [ "$OS_PRERELEASES" == "false" ] && [ "${varr[1]}" == "true" ]; then
             continue  # skip prereleases
         fi
         if [ "$board" != "${varr[2]}" ]; then
@@ -114,7 +114,7 @@ function show_versions() {
 function show_current() {
     source $SYS_VERSION_FILE
     
-    echo $os_version
+    echo $OS_VERSION
 }
 
 
@@ -123,11 +123,29 @@ function show_current() {
 function do_download() {
     echo "downloading..."
 
-    rm -f $FW_DIR/$FW_FILE_GZ $FW_DIR/$FW_FILE_XZ
-    rm -f $FW_DIR/$FW_FILE_EXTR
-    rm -f $FW_DIR/$BOOT_READY_FILE
+    rm -rf $FW_DIR/*
+    mkdir -p $FW_DIR
 
-    source $OS_CONF
+    # Look for local file first
+    if [ -f "$1" ]; then
+        version="custom"
+        FNAME=`basename $1`
+        FILEEXT=${FNAME##*.}
+        DST_FNAME=""
+        if [ "$FILEEXT" == "xz" ]; then
+            DST_FNAME="$FW_DIR/$FW_FILE_XZ"
+        elif [ "$FILEEXT" == "gz" ]; then
+            DST_FNAME="$FW_DIR/$FW_FILE_GZ"
+        fi
+        if [ -n "$DST_FNAME" ]; then
+            cp -f $1 $DST_FNAME
+            echo $version > $FW_DIR/$VER_FILE
+            return
+        fi
+    fi
+
+    source /etc/init.d/os_conf  # we need this for the OS_ vars
+    
     board=$(cat $SYS_BOARD_FILE)
     url=$1
     version=$1
@@ -155,13 +173,11 @@ function do_download() {
         outfile=$FW_DIR/$FW_FILE_XZ
     fi
 
-    rm -rf $FW_DIR/*
-    mkdir -p $FW_DIR
     echo $version > $FW_DIR/$VER_FILE
 
     curl_opts="-S -f -L"
-    if [ -n "$os_firmware_username" ]; then
-        curl_opts+=" --user $os_firmware_username:$os_firmware_password"
+    if [ -n "$OS_FIRMWARE_USERNAME" ]; then
+        curl_opts+=" --user $OS_FIRMWARE_USERNAME:$OS_FIRMWARE_PASSWORD"
     fi
 
     curl $curl_opts -o $outfile "$url" &> $FW_DIR/$CURL_LOG_FILE &
diff --git a/board/nanopineo/os.conf b/board/nanopineo/os.conf
index dc77b07e6d..bbfeece44c 100644
--- a/board/nanopineo/os.conf
+++ b/board/nanopineo/os.conf
@@ -1,2 +1,2 @@
-os_tty_login="ttyS0"
+OS_TTY_LOGIN="ttyS0"
 
diff --git a/board/nanopineo2/os.conf b/board/nanopineo2/os.conf
index dc77b07e6d..bbfeece44c 100644
--- a/board/nanopineo2/os.conf
+++ b/board/nanopineo2/os.conf
@@ -1,2 +1,2 @@
-os_tty_login="ttyS0"
+OS_TTY_LOGIN="ttyS0"
 
diff --git a/board/odroidc1/os.conf b/board/odroidc1/os.conf
index dc77b07e6d..bbfeece44c 100644
--- a/board/odroidc1/os.conf
+++ b/board/odroidc1/os.conf
@@ -1,2 +1,2 @@
-os_tty_login="ttyS0"
+OS_TTY_LOGIN="ttyS0"
 
diff --git a/board/odroidc2/os.conf b/board/odroidc2/os.conf
index dc77b07e6d..bbfeece44c 100644
--- a/board/odroidc2/os.conf
+++ b/board/odroidc2/os.conf
@@ -1,2 +1,2 @@
-os_tty_login="ttyS0"
+OS_TTY_LOGIN="ttyS0"
 
diff --git a/board/odroidxu4/overlay/etc/init.d/S02waiteth b/board/odroidxu4/overlay/etc/init.d/S02waiteth
index 6873243889..4b891c7d71 100755
--- a/board/odroidxu4/overlay/etc/init.d/S02waiteth
+++ b/board/odroidxu4/overlay/etc/init.d/S02waiteth
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-test -n "$os_version" || source /etc/init.d/base
+test -n "$OS_VERSION" || source /etc/init.d/base
 
 case "$1" in
     start)
diff --git a/board/raspberrypi/overlay/etc/init.d/S05cpufreq b/board/raspberrypi/overlay/etc/init.d/S05cpufreq
index 82ae420f49..0644c34e22 100755
--- a/board/raspberrypi/overlay/etc/init.d/S05cpufreq
+++ b/board/raspberrypi/overlay/etc/init.d/S05cpufreq
@@ -1,18 +1,19 @@
 #!/bin/bash
 
-test -n "$os_version" || source /etc/init.d/base
+GOV="ondemand"
+CPUFREQDIR="/sys/devices/system/cpu/cpu0/cpufreq"
+GOVDIR="/sys/devices/system/cpu/cpufreq/$GOV"
 
-gov="ondemand"
-cpufreqdir="/sys/devices/system/cpu/cpu0/cpufreq"
-govdir="/sys/devices/system/cpu/cpufreq/$gov"
+
+test -n "$OS_VERSION" || source /etc/init.d/base
 
 configure() {
-    echo $gov > $cpufreqdir/scaling_governor
-    if [[ $gov == "ondemand" ]]; then
-        echo 50 > $govdir/up_threshold
-        echo 100000 > $govdir/sampling_rate
-        echo 50 > $govdir/sampling_down_factor
-        echo 1 > $govdir/io_is_busy
+    echo $GOV > $CPUFREQDIR/scaling_governor
+    if [[ $GOV == "ondemand" ]]; then
+        echo 50 > $GOVDIR/up_threshold
+        echo 100000 > $GOVDIR/sampling_rate
+        echo 50 > $GOVDIR/sampling_down_factor
+        echo 1 > $GOVDIR/io_is_busy
     fi
 }
 
diff --git a/board/raspberrypi/overlay/etc/init.d/S11throttlewatch b/board/raspberrypi/overlay/etc/init.d/S11throttlewatch
index a06374158c..b8ea3272f3 100755
--- a/board/raspberrypi/overlay/etc/init.d/S11throttlewatch
+++ b/board/raspberrypi/overlay/etc/init.d/S11throttlewatch
@@ -1,8 +1,9 @@
 #!/bin/bash
 
-check_interval=30
+CHECK_INTERVAL=30
 
-test -n "$os_version" || source /etc/init.d/base
+
+test -n "$OS_VERSION" || source /etc/init.d/base
 
 get_throttled_now() {
     t=$(vcgencmd get_throttled | cut -d '=' -f 2)
@@ -25,7 +26,7 @@ watch_now() {
             logger -t throttlewatch -s "currently: $t"
         fi
 
-        sleep $check_interval
+        sleep $CHECK_INTERVAL
     done
 }
 
@@ -37,7 +38,7 @@ watch_since_boot() {
             break
         fi
         
-        sleep $check_interval
+        sleep $CHECK_INTERVAL
     done
 }
 
diff --git a/board/raspberrypi/overlay/etc/init.d/S13btuart b/board/raspberrypi/overlay/etc/init.d/S13btuart
index f5d51a4148..c874c8b9ef 100755
--- a/board/raspberrypi/overlay/etc/init.d/S13btuart
+++ b/board/raspberrypi/overlay/etc/init.d/S13btuart
@@ -1,14 +1,15 @@
 #!/bin/bash
 
-sys_conf="/etc/bluetooth.conf"
-boot_conf="/boot/bluetooth.conf"
-conf="/data/etc/bluetooth.conf"
+SYS_CONF="/etc/bluetooth.conf"
+BOOT_CONF="/boot/bluetooth.conf"
+CONF="/data/etc/bluetooth.conf"
 
-test -f $conf || test -f $boot_conf || test -f $sys_conf || exit 0
+
+test -f $CONF || test -f $BOOT_CONF || test -f $SYS_CONF || exit 0
 
 test -d "/proc/device-tree/soc/gpio@7e200000/uart0_pins" || exit 0  # no rpi bluetooth detected
 
-test -n "$os_version" || source /etc/init.d/base
+test -n "$OS_VERSION" || source /etc/init.d/base
 
 function start() {
     if [[ "$(cat /proc/device-tree/aliases/uart0)" = "$(cat /proc/device-tree/aliases/serial1)" ]] ; then
diff --git a/board/raspberrypi2/overlay/etc/init.d/S05cpufreq b/board/raspberrypi2/overlay/etc/init.d/S05cpufreq
index 82ae420f49..0644c34e22 100755
--- a/board/raspberrypi2/overlay/etc/init.d/S05cpufreq
+++ b/board/raspberrypi2/overlay/etc/init.d/S05cpufreq
@@ -1,18 +1,19 @@
 #!/bin/bash
 
-test -n "$os_version" || source /etc/init.d/base
+GOV="ondemand"
+CPUFREQDIR="/sys/devices/system/cpu/cpu0/cpufreq"
+GOVDIR="/sys/devices/system/cpu/cpufreq/$GOV"
 
-gov="ondemand"
-cpufreqdir="/sys/devices/system/cpu/cpu0/cpufreq"
-govdir="/sys/devices/system/cpu/cpufreq/$gov"
+
+test -n "$OS_VERSION" || source /etc/init.d/base
 
 configure() {
-    echo $gov > $cpufreqdir/scaling_governor
-    if [[ $gov == "ondemand" ]]; then
-        echo 50 > $govdir/up_threshold
-        echo 100000 > $govdir/sampling_rate
-        echo 50 > $govdir/sampling_down_factor
-        echo 1 > $govdir/io_is_busy
+    echo $GOV > $CPUFREQDIR/scaling_governor
+    if [[ $GOV == "ondemand" ]]; then
+        echo 50 > $GOVDIR/up_threshold
+        echo 100000 > $GOVDIR/sampling_rate
+        echo 50 > $GOVDIR/sampling_down_factor
+        echo 1 > $GOVDIR/io_is_busy
     fi
 }
 
diff --git a/board/raspberrypi2/overlay/etc/init.d/S11throttlewatch b/board/raspberrypi2/overlay/etc/init.d/S11throttlewatch
index a06374158c..b8ea3272f3 100755
--- a/board/raspberrypi2/overlay/etc/init.d/S11throttlewatch
+++ b/board/raspberrypi2/overlay/etc/init.d/S11throttlewatch
@@ -1,8 +1,9 @@
 #!/bin/bash
 
-check_interval=30
+CHECK_INTERVAL=30
 
-test -n "$os_version" || source /etc/init.d/base
+
+test -n "$OS_VERSION" || source /etc/init.d/base
 
 get_throttled_now() {
     t=$(vcgencmd get_throttled | cut -d '=' -f 2)
@@ -25,7 +26,7 @@ watch_now() {
             logger -t throttlewatch -s "currently: $t"
         fi
 
-        sleep $check_interval
+        sleep $CHECK_INTERVAL
     done
 }
 
@@ -37,7 +38,7 @@ watch_since_boot() {
             break
         fi
         
-        sleep $check_interval
+        sleep $CHECK_INTERVAL
     done
 }
 
diff --git a/board/raspberrypi3/overlay/etc/init.d/S05cpufreq b/board/raspberrypi3/overlay/etc/init.d/S05cpufreq
index 82ae420f49..0644c34e22 100755
--- a/board/raspberrypi3/overlay/etc/init.d/S05cpufreq
+++ b/board/raspberrypi3/overlay/etc/init.d/S05cpufreq
@@ -1,18 +1,19 @@
 #!/bin/bash
 
-test -n "$os_version" || source /etc/init.d/base
+GOV="ondemand"
+CPUFREQDIR="/sys/devices/system/cpu/cpu0/cpufreq"
+GOVDIR="/sys/devices/system/cpu/cpufreq/$GOV"
 
-gov="ondemand"
-cpufreqdir="/sys/devices/system/cpu/cpu0/cpufreq"
-govdir="/sys/devices/system/cpu/cpufreq/$gov"
+
+test -n "$OS_VERSION" || source /etc/init.d/base
 
 configure() {
-    echo $gov > $cpufreqdir/scaling_governor
-    if [[ $gov == "ondemand" ]]; then
-        echo 50 > $govdir/up_threshold
-        echo 100000 > $govdir/sampling_rate
-        echo 50 > $govdir/sampling_down_factor
-        echo 1 > $govdir/io_is_busy
+    echo $GOV > $CPUFREQDIR/scaling_governor
+    if [[ $GOV == "ondemand" ]]; then
+        echo 50 > $GOVDIR/up_threshold
+        echo 100000 > $GOVDIR/sampling_rate
+        echo 50 > $GOVDIR/sampling_down_factor
+        echo 1 > $GOVDIR/io_is_busy
     fi
 }
 
diff --git a/board/raspberrypi3/overlay/etc/init.d/S11throttlewatch b/board/raspberrypi3/overlay/etc/init.d/S11throttlewatch
index a06374158c..b8ea3272f3 100755
--- a/board/raspberrypi3/overlay/etc/init.d/S11throttlewatch
+++ b/board/raspberrypi3/overlay/etc/init.d/S11throttlewatch
@@ -1,8 +1,9 @@
 #!/bin/bash
 
-check_interval=30
+CHECK_INTERVAL=30
 
-test -n "$os_version" || source /etc/init.d/base
+
+test -n "$OS_VERSION" || source /etc/init.d/base
 
 get_throttled_now() {
     t=$(vcgencmd get_throttled | cut -d '=' -f 2)
@@ -25,7 +26,7 @@ watch_now() {
             logger -t throttlewatch -s "currently: $t"
         fi
 
-        sleep $check_interval
+        sleep $CHECK_INTERVAL
     done
 }
 
@@ -37,7 +38,7 @@ watch_since_boot() {
             break
         fi
         
-        sleep $check_interval
+        sleep $CHECK_INTERVAL
     done
 }
 
diff --git a/board/raspberrypi3/overlay/etc/init.d/S13btuart b/board/raspberrypi3/overlay/etc/init.d/S13btuart
index 513842ba6a..c874c8b9ef 100755
--- a/board/raspberrypi3/overlay/etc/init.d/S13btuart
+++ b/board/raspberrypi3/overlay/etc/init.d/S13btuart
@@ -1,12 +1,15 @@
 #!/bin/bash
 
-sys_conf="/etc/bluetooth.conf"
-boot_conf="/boot/bluetooth.conf"
-conf="/data/etc/bluetooth.conf"
+SYS_CONF="/etc/bluetooth.conf"
+BOOT_CONF="/boot/bluetooth.conf"
+CONF="/data/etc/bluetooth.conf"
 
-test -f $conf || test -f $boot_conf || test -f $sys_conf || exit 0
 
-test -n "$os_version" || source /etc/init.d/base
+test -f $CONF || test -f $BOOT_CONF || test -f $SYS_CONF || exit 0
+
+test -d "/proc/device-tree/soc/gpio@7e200000/uart0_pins" || exit 0  # no rpi bluetooth detected
+
+test -n "$OS_VERSION" || source /etc/init.d/base
 
 function start() {
     if [[ "$(cat /proc/device-tree/aliases/uart0)" = "$(cat /proc/device-tree/aliases/serial1)" ]] ; then