add block-extroot, a package for using an external filesystem as rootfs (patch by cshore)

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@19880 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 20 insertions, 0 deletions

diff --git a/package/block-extroot/files/60_pivot_usb_root b/package/block-extroot/files/60_pivot_usb_root
new file mode 100644
index 000000000..c8572a35f
--- /dev/null
+++ b/package/block-extroot/files/60_pivot_usb_root
@@ -0,0 +1,20 @@
+#!/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_IS_SQUASHFS" = "true" ]; then
+			umount /jffs
+		fi
+		mount -o remount,ro / && fopivot /overlay /rom && pi_mount_skip_next=true
+	}
+}
+
+boot_hook_add preinit_mount_root external_root_pivot
+