package/base-files/brcm-2.6/sbin/mount_root

   1 #!/bin/sh
   2 # Copyright (C) 2006 OpenWrt.org
   3
   4 is_dirty() {
   5         grep Broadcom /proc/cpuinfo >&- || return 1
   6         OFFSET="$(($(hexdump -v /dev/mtdblock/1 -s 20 -n 2 -e '"%d"')-1))"
   7         return $(hexdump -v /dev/mtdblock/1 -s $OFFSET -n 1 -e '"%d"')
   8 }
   9
  10 size=$(awk '/Mem:/ {l=5242880;print((s=$2/2)<l)?$2-l:s}' /proc/meminfo)
  11 mount none /tmp -t tmpfs -o size=$size
  12
  13 if [ "$1" != "failsafe" ]; then
  14         mtd unlock linux
  15         mount | grep jffs2 >&-
  16         if [ $? = 0 ] ; then
  17                 mount -o remount,rw /dev/root /
  18         else
  19                 . /bin/firstboot
  20                 is_dirty
  21                 [ $? != 0 ] && {
  22                         echo "switching to jffs2"
  23                         mount /dev/mtdblock/4 /jffs -t jffs2
  24                         pivot /jffs /rom
  25                 } || {
  26                         echo "jffs2 unusable; using ramdisk"
  27                         ramoverlay
  28                 }
  29         fi
  30 fi
  31
  32 mount none /tmp -t tmpfs -o remount,nosuid,nodev,mode=1777
  33 mkdir -p /dev/pts
  34 mount none /dev/pts -t devpts
  35 mount -t sysfs none /sys 2>&-