[package] block-mount: Merged block-mount, block-extroot, and block-hotplug into...

[openwrt.git] / package / block-mount / files / 60_pivot_usb_root

diff --git a/package/block-mount/files/60_pivot_usb_root b/package/block-mount/files/60_pivot_usb_root
new file mode 100644 (file)
index 0000000..b610a4a
--- /dev/null
+++ b/package/block-mount/files/60_pivot_usb_root
@@ -0,0 +1,27 @@
+#!/bin/sh
+# Copyright (C) 2010 Vertical Communications
+
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+
+# Determine if we are requested to mount external root
+
+external_root_pivot() {
+       check_skip || [ "$pi_extroot_mount_success" != "true" ] || {
+               echo "switching to external rootfs"
+               if [ "$ER_OVERLAY_ROM" = "/overlay" ]; then
+                       if [ "$ER_IS_SQUASHFS" = "true" ]; then
+                               umount /tmp/overlay
+                       fi
+                       mount -o remount,ro / && fopivot /overlay /rom && pi_mount_skip_next=true
+               elif [ "$ER_OVERLAY_ROM" = "/rom" ]; then
+                       if [ "$ER_IS_SQUASHFS" = "true" ]; then
+                               umount /tmp/overlay
+                       fi
+                       mount -o remount,ro / && pivot_rom /rom /rom && pi_mount_skip_next=true
+               fi
+       }
+}
+
+boot_hook_add preinit_mount_root external_root_pivot
+