add support for the 'dirty flag' in the boot scripts - a squashfs image will now...

SVN-Revision: 2254

diff --git a/openwrt/package/base-files/default/sbin/mount_root b/openwrt/package/base-files/default/sbin/mount_root
index 29c5126ba195fb1a8bbd86e7bfec478ec6fc2bcb..7bcf80c6f1234e4e50308cc3c4a47742c121f604 100755 (executable)
--- 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