package/block-mount/files/60_pivot_usb_root

   1 #!/bin/sh
   2 # Copyright (C) 2010 Vertical Communications
   3
   4 # This is free software, licensed under the GNU General Public License v2.
   5 # See /LICENSE for more information.
   6
   7 # Determine if we are requested to mount external root
   8
   9 external_root_pivot() {
  10         check_skip || [ "$pi_extroot_mount_success" != "true" ] || {
  11                 echo "switching to external rootfs"
  12                 if [ "$ER_OVERLAY_ROM" = "/overlay" ]; then
  13                         if [ "$ER_IS_SQUASHFS" = "true" ]; then
  14                                 umount /tmp/overlay
  15                         fi
  16                         mount -o remount,ro / && fopivot /overlay /rom && pi_mount_skip_next=true
  17                 elif [ "$ER_OVERLAY_ROM" = "/rom" ]; then
  18                         if [ "$ER_IS_SQUASHFS" = "true" ]; then
  19                                 umount /tmp/overlay
  20                         fi
  21                         mount -o remount,ro / && pivot_rom /rom /rom && pi_mount_skip_next=true
  22                 fi
  23         }
  24 }
  25
  26 boot_hook_add preinit_mount_root external_root_pivot
  27