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