installer: add double confirmation before actuall install process (formating disk)

add custom install where only KERNEL and SYSTEM files are copied to System partition, closes #1985

someone should go over the changes just to be sure that there is no errors

packages/tools/installer/scripts/installer

@@ -50,6 +50,9 @@
 # cumulative, e.g., "\Zb\Z1" makes the following text bold (perhaps bright)
 # red. Restore normal settings with "\Zn".
 
+# disable Ctrl+C - can be very dangerous
+trap '' 2
+
 [ -f /etc/installer.conf ] && . /etc/installer.conf || exit 0
 
 dbglg() {
@@ -171,22 +174,23 @@ do_install_mbr() {
 }
 
 do_install_quick() {
-
   # show menu
     MSG_TITLE="\Z4[ QUICK INSTALL MENU ]\Zn"
     MSG_MENU="\nUse the up/down arrows to select the correct device.\n\n Please select a device:"
     MSG_CANCEL="Back"
+    DIALOG_OPTIONS="--defaultno"
 
     create_device_list
 
     dialog --colors --backtitle "$BACKTITLE" --cancel-label "$MSG_CANCEL" \
-      --title "$MSG_TITLE" --menu "$MSG_MENU" 20 50 5 \
+      $DIALOG_OPTIONS --title "$MSG_TITLE" --menu "$MSG_MENU" 20 50 5 \
       $DEVICE_LIST 2> $TMPDIR/device_for_install
 
   # now we must do everything
     case $? in
       0)
         INSTALL_DEVICE=$(cat "$TMPDIR/device_for_install")
+        INSTALL_DEVICE_FULL=$(echo $DEVICE_LIST | sed "s|.*$INSTALL_DEVICE \([^ ]*\).*|$INSTALL_DEVICE \1|")
 
         prompt_gpt
         prompt_ssh
@@ -197,6 +201,25 @@ do_install_quick() {
           EXTLINUX_SSH="ssh"
         fi
 
+        # check for confirmation (twice!)
+        MSG_TITLE="\Z1[ Confirmation before installing ]\Zn"
+        MSG_DETAIL="\nIf you continue the target disk will be wiped out:\n\n$INSTALL_DEVICE_FULL\n\n"
+        DIALOG_OPTIONS="--defaultno"
+        dialog --colors --backtitle "$BACKTITLE" --title "$MSG_TITLE" \
+          $DIALOG_OPTIONS --yesno "$MSG_DETAIL" 0 0
+        if [ $? -ne 0 ]; then
+          menu_main
+        fi
+
+        MSG_TITLE="\Z1[ Confirmation before installing ]\Zn"
+        MSG_DETAIL="\nThis is last chance to abort the installation!\n\nIf you continue the target disk will be wiped out:\n\n$INSTALL_DEVICE_FULL\n\n\n"
+        DIALOG_OPTIONS="--defaultno"
+        dialog --colors --backtitle "$BACKTITLE" --title "$MSG_TITLE" \
+          $DIALOG_OPTIONS --yesno "$MSG_DETAIL" 0 0
+        if [ $? -ne 0 ]; then
+          menu_main
+        fi
+
         # remove all partitions
           msg_progress_install "1" "get all partitions $INSTALL_DEVICE"
             get_partition $INSTALL_DEVICE
@@ -316,6 +339,124 @@ do_install_quick() {
     esac
 }
 
+do_install_custom() {
+  # show menu
+    MSG_TITLE="\Z4[ CUSTOM INSTALL MENU ]\Zn"
+    MSG_MENU="\nUse the up/down arrows to select the correct partition where you want to overwrite KERNEL and SYSTEM files.\n\n Please select a partition:"
+    MSG_CANCEL="Back"
+    DIALOG_OPTIONS="--defaultno"
+
+    get_device_unmount
+
+    if [ "$DEVICES" = "" ]; then
+      msg_no_device
+    fi
+
+    PARTITION_LIST=""
+    for device in $DEVICES; do
+      get_partition $device
+      for partition in $PARTITIONS; do
+        LABEL=$(tune2fs -l $device$partition | awk 'BEGIN {FS=":"} /Filesystem volume name/ {gsub(/ /,"",$2); print $2}')
+        if [ "$LABEL" = "$DISKLABEL_SYSTEM" ]; then
+          DEVICE_MODEL=$(parted -s $device -m print | grep ^$device | cut -f7 -d ":" | sed "s/;//")
+          DEVICE_SIZE=$(parted -s $device -m print | grep ^$device | cut -f2 -d ":")
+          DEVICE_NAME=$(echo $DEVICE_MODEL ${DEVICE_SIZE} | sed 's/ /_/g')
+          PARTITION_LIST="$PARTITION_LIST $device$partition $DEVICE_NAME"
+        fi
+      done
+    done
+
+    if [ "$PARTITION_LIST" = "" ]; then
+      msg_no_device
+    fi
+
+    dialog --colors --backtitle "$BACKTITLE" --cancel-label "$MSG_CANCEL" \
+      $DIALOG_OPTIONS --title "$MSG_TITLE" --menu "$MSG_MENU" 20 50 5 \
+      $PARTITION_LIST 2> $TMPDIR/device_for_install
+
+  # now we must do everything
+    case $? in
+      0)
+        INSTALL_PARTITION=$(cat "$TMPDIR/device_for_install")
+        INSTALL_PARTITION_FULL=$(echo $PARTITION_LIST | sed "s|.*$INSTALL_PARTITION \([^ ]*\).*|$INSTALL_PARTITION \1|")
+
+        # check for confirmation (twice!)
+        MSG_TITLE="\Z1[ Confirmation before copying ]\Zn"
+        MSG_DETAIL="\nIf you continue the target partition will be\noverwritten with new KERNEL and SYSTEM files:\n\n$INSTALL_PARTITION_FULL\n\n"
+        DIALOG_OPTIONS="--defaultno"
+        dialog --colors --backtitle "$BACKTITLE" --title "$MSG_TITLE" \
+          $DIALOG_OPTIONS --yesno "$MSG_DETAIL" 0 0
+        if [ $? -ne 0 ]; then
+          menu_main
+        fi
+
+        MSG_TITLE="\Z1[ Confirmation before copying ]\Zn"
+        MSG_DETAIL="\nThis is last chance to abort the copying!\n\nIf you continue the target partition will be\noverwritten with new KERNEL and SYSTEM files:\n\n$INSTALL_PARTITION_FULL\n\n\n"
+        DIALOG_OPTIONS="--defaultno"
+        dialog --colors --backtitle "$BACKTITLE" --title "$MSG_TITLE" \
+          $DIALOG_OPTIONS --yesno "$MSG_DETAIL" 0 0
+        if [ $? -ne 0 ]; then
+          menu_main
+        fi
+
+        # mount system partition
+          msg_progress_install "5" "creating $TMPDIR/part1"
+            mkdir -p $TMPDIR/part1 >> $LOGFILE 2>&1
+
+          msg_progress_install "10" "mounting $INSTALL_PARTITION to $TMPDIR/part1"
+            mount -t ext4 $INSTALL_PARTITION $TMPDIR/part1 >> $LOGFILE 2>&1
+
+        # check for enough target space
+          msg_progress_install "15" "checking for space on $INSTALL_PARTITION"
+
+          KERNEL_SIZE=$(stat -t /flash/KERNEL | awk '{print $2}')
+          SYSTEM_SIZE=$(stat -t /flash/SYSTEM | awk '{print $2}')
+          SRC_SIZE=$(( $KERNEL_SIZE + $SYSTEM_SIZE ))
+
+          DEST_SIZE=$(df $TMPDIR/part1 | awk '/[0-9]%/{print $4}')
+          DEST_SIZE=$(( $DEST_SIZE * 1024 ))
+          if [ -f $TMPDIR/part1/KERNEL ]; then
+            KERNEL_SIZE=$(stat -t $TMPDIR/part1/KERNEL | awk '{print $2}')
+            DEST_SIZE=$(( $DEST_SIZE + $KERNEL_SIZE ))
+          fi
+          if [ -f $TMPDIR/part1/SYSTEM ]; then
+            SYSTEM_SIZE=$(stat -t $TMPDIR/part1/SYSTEM | awk '{print $2}')
+            DEST_SIZE=$(( $DEST_SIZE + $SYSTEM_SIZE ))
+          fi
+
+          if [ $SRC_SIZE -ge $DEST_SIZE ]; then
+            umount $TMPDIR/part1 >> $LOGFILE 2>&1
+            rmdir $TMPDIR/part1 >> $LOGFILE 2>&1
+            msg_target_space
+            menu_main
+          fi
+
+        # install system files
+          msg_progress_install "20" "installing Kernel"
+            cp /flash/KERNEL $TMPDIR/part1 >> $LOGFILE 2>&1
+
+          msg_progress_install "40" "installing System"
+            cp /flash/SYSTEM $TMPDIR/part1 >> $LOGFILE 2>&1
+            sync
+
+        # umount system partition, remove mountpoint
+          msg_progress_install "95" "unmount $TMPDIR/part1"
+            umount $TMPDIR/part1 >> $LOGFILE 2>&1
+
+          msg_progress_install "100" "remove $TMPDIR/part1"
+            rmdir $TMPDIR/part1 >> $LOGFILE 2>&1
+
+        menu_main
+        ;;
+      1)
+        menu_main
+        ;;
+      255)
+        do_poweroff
+        ;;
+    esac
+}
+
 msg_not_implemented() {
   # show a dialog that this function is not yet implemented
     MSG_TITLE="\Z2[ WORK IN PROGRESS ]\Zn"
@@ -350,6 +491,16 @@ msg_no_device() {
     menu_main
 }
 
+msg_target_space() {
+  # show an error dialog for missing space
+    MSG_TITLE="\Z1[ TARGET SPACE ]\Zn"
+    MSG_INFOBOX="\nNot enough target space!\nCopying aborted.\n"
+
+    dialog --colors --backtitle "$BACKTITLE" --title "$MSG_TITLE" --msgbox "$MSG_INFOBOX" 8 70
+
+    menu_main
+}
+
 msg_install_ready() {
   # show a dialog that we have installed
     MSG_TITLE="\Z1[ INFORMATION ]\Zn"
@@ -452,7 +603,7 @@ menu_main() {
         ITEM_MAINMENU=$(cat "$TMPDIR/mainmenu")
         case $ITEM_MAINMENU in
           1) do_install_quick; break;;
-          2) menu_custom; break;;
+          2) do_install_custom; break;;
           3) menu_setup; break;;
           4) menu_bios; break;;
           5) logfile_show; break;;
@@ -503,12 +654,6 @@ menu_bios() {
     esac
 }
 
-menu_custom() {
-  # TODO: show the installmenu
-    msg_not_implemented
-    menu_main
-}
-
 bios_backup() {
   # create a backup of the installed bios
     if [ "$BIOS_UPDATE" = "yes" -a -f "$BIOS_FILE" ]; then