openwrt/package/base-files/default/sbin/mount_root

   1 #!/bin/sh
   2 is_dirty() {
   3         grep Broadcom /proc/cpuinfo >&- || return 1
   4         OFFSET="$(($(hexdump -v /dev/mtdblock/1 -s 20 -n 2 -e '"%d"')-1))"
   5         return $(hexdump -v /dev/mtdblock/1 -s $OFFSET -n 1 -e '"%d"')
   6 }
   7
   8 size=$(awk '/Mem:/ {l=5242880;print((s=$2/2)<l)?$2-l:s}' /proc/meminfo)
   9 mount none /tmp -t tmpfs -o size=$size
  10
  11 if [ "$1" != "failsafe" ]; then
  12         mtd unlock linux
  13         mount | grep jffs2 >&-
  14         if [ $? = 0 ] ; then
  15                 if [ $(cat /proc/mtd | wc -l) = 6 ]; then
  16                         mtd erase OpenWrt
  17                         jffs2root --move
  18                 else
  19                         mount -o remount,rw /dev/root /
  20                 fi
  21         else
  22                 . /bin/firstboot
  23                 is_dirty
  24                 [ $? != 0 ] && {
  25                         echo "switching to jffs2"
  26                         mount /dev/mtdblock/4 /jffs -t jffs2
  27                         pivot /jffs /rom
  28                 } || {
  29                         echo "jffs2 unusable; using ramdisk"
  30                         ramoverlay
  31                 }
  32         fi
  33 fi
  34
  35 mount none /tmp -t tmpfs -o remount,nosuid,nodev,mode=1777
  36 mkdir -p /dev/pts
  37 mount none /dev/pts -t devpts
  38 mount -t sysfs none /sys 2>&-