From: Felix Fietkau <nbd@openwrt.org>
Date: Sat, 22 Oct 2005 19:46:41 +0000 (+0000)
Subject: add support for the 'dirty flag' in the boot scripts - a squashfs image will now... 
X-Git-Tag: whiterussian_rc4~88
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=89673e089e42346e900124f0bcb31ce8f9c5c473;p=openwrt%2Fsvn-archive%2Fopenwrt.git

add support for the 'dirty flag' in the boot scripts - a squashfs image will now always clear the jffs2 part on the first boot after flashing

SVN-Revision: 2254
---

diff --git a/openwrt/package/base-files/default/sbin/mount_root b/openwrt/package/base-files/default/sbin/mount_root
index 29c5126ba1..7bcf80c6f1 100755
--- a/openwrt/package/base-files/default/sbin/mount_root
+++ b/openwrt/package/base-files/default/sbin/mount_root
@@ -1,4 +1,9 @@
 #!/bin/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
@@ -13,6 +18,10 @@ if [ "$1" != "failsafe" ]; then
 		fi
 	else
 		if [ -z "$(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