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

   1 #!/bin/sh
   2 . /etc/nvram.sh
   3 is_clean() {
   4         OFFSET="$((0x$(dd if=/dev/mtdblock/1 bs=1 skip=$((0x14)) count=2 2>&- | hexdump | grep 0000000 | cut -d ' ' -f 2) - 1))"
   5         dd if=/dev/mtdblock/1 bs=1 skip=$OFFSET count=1 2>&- | hexdump -v | grep ' 0000' > /dev/null && return 255 || return 0
   6 }
   7
   8 if [ "$1" != "failsafe" ]; then
   9         mount | grep jffs2 >&-
  10         if [ $? = 0 ] ; then
  11                 if [ $(cat /proc/mtd | wc -l) = 6 ]; then
  12                         echo 5 > /proc/sys/diag
  13                         mtd unlock linux
  14                         mtd erase OpenWrt
  15                         jffs2root --move
  16                 else
  17                         mtd unlock rootfs
  18                         mount -o remount,rw /dev/root /
  19                 fi
  20         else
  21                 if [ -z "$(nvram get no_root_swap)" ]; then
  22                         is_clean || {
  23                                 mtd erase OpenWrt
  24                                 jffs2root --clean
  25                         }
  26                         mtd unlock OpenWrt
  27                         mount -t jffs2 /dev/mtdblock/4 /jffs
  28                         pivot_root /jffs /jffs/rom
  29                         mount none /proc -t proc
  30                         mount none /dev -t devfs
  31                         umount /rom/proc rom/dev >&-
  32                 fi
  33         fi
  34 fi
  35 mount none /tmp -t tmpfs -o nosuid,nodev,mode=1777,size=50%
  36 mkdir -p /dev/pts
  37 mount none /dev/pts -t devpts