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

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