package/base-files/files/sbin/mount_root

   1 #!/bin/sh
   2 # Copyright (C) 2006 OpenWrt.org
   3 . /etc/functions.sh
   4
   5 mount none /proc -t proc
   6
   7 size=$(awk '/MemTotal:/ {l=5242880;mt=($2*1024);print((s=mt/2)<l)?mt-l:s}' /proc/meminfo)
   8 mount none /tmp -t tmpfs -o size=$size,nosuid,nodev,mode=1777
   9
  10 if grep devfs /proc/filesystems >/dev/null; then
  11         mount none /dev -t devfs
  12 else
  13         mount -t tmpfs tmpfs /dev -o size=512K
  14         mknod /dev/console c 5 1
  15         exec >/dev/console </dev/console 2>&1
  16 fi
  17
  18 mkdir /dev/shm
  19
  20 if grep sysfs /proc/filesystems >/dev/null; then
  21         mount -t sysfs none /sys
  22         HOTPLUG=""
  23         # use a minimal ruleset only for creating device nodes
  24         /sbin/hotplug2 --no-persistent --coldplug --set-rules-file /etc/hotplug2-init.rules
  25 else
  26         HOTPLUG="/sbin/hotplug2-dnode"
  27 fi
  28 echo "$HOTPLUG" > /proc/sys/kernel/hotplug
  29
  30 mkdir -p /dev/pts
  31 mount none /dev/pts -t devpts
  32
  33 jffs2_ready () {
  34         mtdpart="$(find_mtd_part rootfs_data)"
  35         magic=$(hexdump $mtdpart -n 4 -e '4/1 "%02x"')
  36         [ "$magic" != "deadc0de" ]
  37 }
  38
  39 [ failsafe != "$1" ] && {
  40         grep rootfs /proc/mtd >/dev/null 2>/dev/null && {
  41                 mtd unlock rootfs
  42                 grep rootfs_data /proc/mtd >/dev/null 2>/dev/null && {
  43                         . /bin/firstboot
  44                         jffs2_ready && {
  45                                 echo "switching to jffs2"
  46                                 mount "$(find_mtd_part rootfs_data)" /jffs -t jffs2
  47                                 fopivot /jffs /rom
  48                         } || {
  49                                 echo "jffs2 not ready yet; using ramdisk"
  50                                 ramoverlay
  51                         }
  52                 }
  53         } || mount -o remount,rw /dev/root /
  54 }