From 6cd7a4809342fbe99c3713134ef3b8a61525813d Mon Sep 17 00:00:00 2001
From: nbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73>
Date: Sat, 22 Oct 2005 19:54:33 +0000
Subject: add base-files change from whiterussian

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@2257 3c298f89-4303-0410-b956-a3cf2f4a3e73
---
 openwrt/package/base-files/default/sbin/mount_root | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

(limited to 'openwrt/package/base-files/default')

diff --git a/openwrt/package/base-files/default/sbin/mount_root b/openwrt/package/base-files/default/sbin/mount_root
index bc8d69c79..c8edaaa2f 100755
--- a/openwrt/package/base-files/default/sbin/mount_root
+++ b/openwrt/package/base-files/default/sbin/mount_root
@@ -1,10 +1,15 @@
 #!/bin/sh
 . /etc/nvram.sh
+is_clean() {
+	OFFSET="$((0x$(dd if=/dev/mtdblock/1 bs=1 skip=$((0x14)) count=2 2>&- | hexdump | grep 0000000 | cut -d ' ' -f 2) - 1))"
+	dd if=/dev/mtdblock/1 bs=1 skip=$OFFSET count=1 2>&- | hexdump -v | grep ' 0000' > /dev/null && return 255 || return 0
+}
+
 if [ "$1" != "failsafe" ]; then 
 	mount | grep jffs2 >&-
 	if [ $? = 0 ] ; then
 		if [ $(cat /proc/mtd | wc -l) = 6 ]; then
-			[ -f /proc/sys/diag ] && echo 5 > /proc/sys/diag
+			echo 5 > /proc/sys/diag
 			mtd unlock linux
 			mtd erase OpenWrt
 			jffs2root --move
@@ -13,7 +18,11 @@ if [ "$1" != "failsafe" ]; then
 			mount -o remount,rw /dev/root /
 		fi
 	else
-		if [ \! -x /usr/sbin/nvram -o -z "$(nvram get no_root_swap)" ]; then
+		if [ -z "$(nvram get no_root_swap)" ]; then
+			is_clean || {
+				mtd erase OpenWrt
+				jffs2root --clean
+			}
 			mtd unlock OpenWrt
 			mount -t jffs2 /dev/mtdblock/4 /jffs
 			pivot_root /jffs /jffs/rom
-- 
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