busybox: initial /storage fs resizing support

... work in progress. do not use

packages/sysutils/busybox/scripts/fs-resize

@@ -25,5 +25,47 @@
 #
 
 if [ -e /storage/.please_resize_me ] ; then
- rm -f /storage/.please_resize_me
+  # get the disk. /storage on 2nd partition
+  PART=$(grep "/storage " /proc/mounts | cut -d" " -f1 | grep '2$')
+
+  # get disk: /dev/sdx2 -> /dev/sdx, /dev/mmcblkxp2 -> /dev/mmcblkx
+  case $PART in
+    "/dev/mmcblk"*)
+      DISK=$(echo $PART | sed s/p2$//g)
+      ;;
+    *)
+      DISK=$(echo $PART | sed s/2$//g)
+      ;;
+  esac
+
+  # just in case
+  if [ ! -z "$DISK" -a ! -z "$PART" ] ; then
+    # get storage partition start
+    PART_START=$(parted -s -m $DISK unit b print |grep -v ^/dev |grep -v BYT | grep ^2: |  cut -f2 -d ":")
+
+    # failed to get partition start offset ?
+    if [ ! -z "$PART_START" ] ; then
+      rm -f /storage/.please_resize_me
+      sync
+      umount $PART
+      # TODO: clean up debug
+      echo resizing /storage...
+      echo ""
+      echo ... parted -s -m $DISK rm 2
+      parted -s -m $DISK rm 2 &>/dev/null
+      echo ""
+      echo ... parted -s -m $DISK unit b mkpart primary $PART_START 100%
+      parted -s -m $DISK unit b mkpart primary $PART_START 100% &>/dev/null
+      echo ""
+      echo ... e2fsck -f -p $PART
+      e2fsck -f -p $PART &>/dev/null
+      echo ""
+      echo ... resize2fs $PART
+      resize2fs $PART &>/dev/null
+      echo ""
+      echo ...done. rebooting in 30s
+      sleep 30
+      reboot
+    fi
+  fi
 fi