source: freewrt/target/linux/package/base-files/files/au1000-2.6/sbin/mount_root@ 475ad56

#!/bin/sh
size=$(awk '/Mem:/ {l=5242880;print((s=$2/2)<l)?$2-l:s}' /proc/meminfo)
mount none /tmp -t tmpfs -o size=$size

if [ "$1" != "failsafe" ]; then 
        mtd unlock filesystem
        mount | grep jffs2 >&-
        if [ $? = 0 ] ; then
                if [ $(cat /proc/mtd | wc -l) = 6 ]; then
                        mtd erase filesystem
                        jffs2root --move
                else
                        mount -o remount,rw /dev/root /
                fi
        else
                . /bin/firstboot
        fi
fi

mount none /tmp -t tmpfs -o remount,nosuid,nodev,mode=1777
mkdir -p /dev/pts
mount none /dev/pts -t devpts
mount -t sysfs none /sys 2>&-