openwrt/target/linux/brcm-2.4/base-files/default/sbin/mount_root

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#!/bin/sh
# Copyright (C) 2006 OpenWrt.org
. /etc/functions.sh
is_dirty() {
mtdpart="$(find_mtd_part linux)"
grep Broadcom /proc/cpuinfo >&- || return 1
OFFSET="$(($(hexdump -v $mtdpart -s 20 -n 2 -e '"%d"')-1))"
return $(hexdump -v $mtdpart -s $OFFSET -n 1 -e '"%d"')
}
if [ "$1" != "failsafe" ]; then
mtd unlock linux
mount | grep jffs2 >&-
if [ $? = 0 ] ; then
mount -o remount,rw /dev/root /
else
. /bin/firstboot
is_dirty
[ $? != 0 ] && {
echo "switching to jffs2"
mount $(find_mtd_part OpenWrt) /jffs -t jffs2
fopivot /jffs /rom
} || {
echo "jffs2 not ready yet; using ramdisk"
ramoverlay
}
fi
fi