target/linux/generic-2.6/base-files/init

   1 #!/bin/sh
   2 # Copyright (C) 2006 OpenWrt.org
   3
   4 export PATH=/bin:/sbin:/usr/bin:/usr/sbin
   5 mount none /proc -t proc
   6
   7 if grep devfs /proc/filesystems > /dev/null; then
   8         mount none /dev -t devfs
   9 else
  10         mount -t sysfs none /sys
  11         mount -t tmpfs tmpfs /dev -o size=512K
  12         mknod /dev/console c 5 1
  13         mkdir /dev/pts
  14         mkdir /dev/shm
  15         /sbin/hotplug2 --no-persistent --coldplug --max_children 1
  16 fi
  17
  18 mount none /dev/pts -t devpts
  19
  20 # the root mount point can come from the kernel command line
  21 # or it can be overridden in the preinit.arch file
  22 [ -f /etc/preinit.arch ] && . /etc/preinit.arch
  23
  24 # if we have no root parameter, just go to running from ramfs
  25 [ -z $rootfs ] && {
  26   export NOMOUNT="No Root"
  27   exec /sbin/init
  28 }
  29
  30 #if we have a failsafe boot selected, dont bother
  31 #trying to find or wait for a root mount point
  32 [ -z "$FAILSAFE" ] || {
  33   exec /bin/busybox init
  34 }
  35
  36 # Load the modules we have in initramfs, this should
  37 # make the media accessible, but, it may take some time
  38 . /etc/functions.sh
  39 load_modules /etc/modules /etc/modules.d/*
  40
  41 #wait 10 seconds for the disc to show up
  42 #usb stick typically takes 4 to 6 seconds
  43 #till it's readable
  44 #it's quite possible the disc never shows up
  45 #if we netbooted this kernel
  46 COUNTER=0
  47 while [ $COUNTER -lt 10 ]; do
  48   sleep 1
  49   [ -e $rootfs ] && let COUNTER=10;
  50   let COUNTER=COUNTER+1
  51 done
  52 [ -e $rootfs ] || {
  53   export FAILSAFE="NoDisc"
  54   exec /bin/busybox init
  55 }
  56
  57 # now we'll try mount it, again with a timeout
  58 # This will fail if the inserted stick is formatted
  59 # in a manner we dont understand
  60 COUNTER=0
  61 while [ $COUNTER -lt 10 ]; do
  62   sleep 1
  63   mount $rootfs /mnt
  64   [ $? -eq "0" ] && let COUNTER=100;
  65   let COUNTER=COUNTER+1
  66 done
  67 [ $? -ne "0" ] && {
  68   export FAILSAFE="MountFail"
  69   exec /bin/busybox init
  70 }
  71
  72 #It mounted, lets look for a postinit file, again, give it time
  73 #I've seen this take 6 seconds to actually complete
  74 COUNTER=0
  75 while [ $COUNTER -lt 10 ]; do
  76   sleep 1
  77   [ -e /mnt/etc/banner ] && let COUNTER=10;
  78   let COUNTER=COUNTER+1
  79 done
  80 [ -e /mnt/etc/banner ] || {
  81   export FAILSAFE="No Openwrt FS"
  82   exec /bin/busybox init
  83 }
  84
  85 unset rootfs
  86
  87 mount -o move /proc /mnt/proc
  88 mount -o move /dev /mnt/dev
  89 mount -o move /dev/pts /mnt/dev/pts
  90 mount -o move /tmp /mnt/tmp
  91 mount -o move /sys /mnt/sys
  92 mount none /tmp -t tmpfs
  93 exec switch_root -c /dev/console /mnt /sbin/init