#!/bin/sh
size=$(awk '/Mem:/ {l=5242880;print((s=$2/2)<l)?$2-l:s}' /proc/meminfo)
mount none /proc -t proc
mount none /tmp -t tmpfs -o size=$size,nosuid,nodev,mode=1777
mkdir -p /dev/pts
mount none /dev/pts -t devpts
mount -t sysfs none /sys 2>&-
mount -o remount,rw /dev/root /