target/linux/generic-2.6/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 mount none /dev -t devfs
   7
   8 # the root mount point can come from the kernel command line
   9 # or it can be overridden in the preinit.arch file
  10 [ -f /etc/preinit.arch ] && . /etc/preinit.arch
  11
  12 # if we have no root parameter, just go to running from ramfs
  13 [ -z $rootfs ] && {
  14   export NOMOUNT="No Root"
  15   exec /sbin/init
  16 }
  17
  18 #if we have a failsafe boot selected, dont bother
  19 #trying to find or wait for a root mount point
  20 [ -z "$FAILSAFE" ] || {
  21   exec /bin/busybox init
  22 }
  23
  24 # Load the modules we have in initramfs, this should
  25 # make the media accessible, but, it may take some time
  26 . /etc/functions.sh
  27 load_modules /etc/modules /etc/modules.d/*
  28
  29 #wait 10 seconds for the disc to show up
  30 #usb stick typically takes 4 to 6 seconds
  31 #till it's readable
  32 #it's quite possible the disc never shows up
  33 #if we netbooted this kernel
  34 COUNTER=0
  35 while [ $COUNTER -lt 10 ]; do
  36   sleep 1
  37   [ -e $rootfs ] && let COUNTER=10;
  38   let COUNTER=COUNTER+1
  39 done
  40 [ -e $rootfs ] || {
  41   export FAILSAFE="NoDisc"
  42   exec /bin/busybox init
  43 }
  44
  45 # now we'll try mount it, again with a timeout
  46 # This will fail if the inserted stick is formatted
  47 # in a manner we dont understand
  48 COUNTER=0
  49 while [ $COUNTER -lt 10 ]; do
  50   sleep 1
  51   mount $rootfs /mnt
  52   [ $? -eq "0" ] && let COUNTER=100;
  53   let COUNTER=COUNTER+1
  54 done
  55 [ $? -ne "0" ] && {
  56   export FAILSAFE="MountFail"
  57   exec /bin/busybox init
  58 }
  59
  60 #It mounted, lets look for a postinit file, again, give it time
  61 #I've seen this take 6 seconds to actually complete
  62 COUNTER=0
  63 while [ $COUNTER -lt 10 ]; do
  64   sleep 1
  65   [ -e /mnt/postinit ] && let COUNTER=10;
  66   let COUNTER=COUNTER+1
  67 done
  68 [ -e /mnt/postinit ] || {
  69   export FAILSAFE="No postinit"
  70   exec /bin/busybox init
  71 }
  72
  73 unset rootfs
  74
  75 mount -o move /proc /mnt/proc
  76 mount -o move /dev /mnt/dev
  77 mount -o move /tmp /mnt/tmp
  78 mount -o move /sys /mnt/sys
  79
  80 exec switch_root -c /dev/console /mnt /postinit