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