gpxe/contrib/initrd/linuxrc

   1 #!/bin/sh
   2 # $Id$
   3
   4 PATH=/sbin:/bin
   5
   6 echo Busybox /linuxrc starting
   7
   8 echo Mounting /proc filesystem
   9 mount -t proc none /proc
  10
  11 echo=echo
  12 if grep '\bquiet\b' /proc/cmdline > /dev/null; then
  13   echo=true
  14   quiet=1
  15 fi
  16
  17 $echo Creating root device
  18 mknod /dev/root b 1 0 2>/dev/null
  19 chmod 700 /dev/root
  20 echo 0x100 > /proc/sys/kernel/real-root-dev
  21
  22 $echo Inserting modules
  23 if [ -z "$quiet" ]; then
  24   /bin/insert-modules
  25 else
  26   /bin/insert-modules >/dev/null
  27 fi
  28
  29 $echo Bringing up loopback interface
  30 ifconfig lo 127.0.0.1 up
  31 route add -net 127.0.0.0 netmask 255.0.0.0 lo
  32
  33 # Hack required for prism2 cards
  34 # It is not yet possible to use iwconfig to configure these cards,
  35 # so we need wlanctl.
  36 if ifconfig wlan0 down 2> /dev/null; then
  37   $echo Setting up wireless link
  38   wlanctl wlan0 lnxreq_ifstate ifstate=enable
  39   wlanctl wlan0 lnxreq_autojoin ssid= authtype=opensystem
  40 fi
  41
  42 $echo Obtaining IP address via DHCP
  43 $echo Trying to obtain IP address via wired link [eth0]
  44 if udhcpc -i eth0 -f -n -q -s /bin/udhcpc-post; then
  45   $echo Successfully obtained IP address via wired link [eth0]
  46 else
  47   $echo Failed to obtain IP address via wired link [eth0]
  48   $echo Trying to obtain IP address via wireless link [wlan0]
  49   udhcpc -i wlan0 -f -n -q -s /bin/udhcpc-post
  50 fi
  51
  52 if [ -d /sysroot/initrd ]; then
  53   $echo Unmounting /proc prior to pivot_root
  54   umount /proc
  55
  56   $echo Pivoting root to /sysroot
  57   pivot_root /sysroot /sysroot/initrd
  58   cd /
  59
  60   $echo Remounting devfs at correct place
  61   mount -t devfs none /dev
  62
  63   $echo Releasing locks on old devfs
  64   exec 0</dev/null
  65   exec 1>/dev/console
  66   exec 2>/dev/console
  67
  68   $echo Unmounting old devfs
  69   umount /initrd/dev
  70 else
  71   # Failed to mount root: report error and hang
  72   echo FATAL ERROR: Failed to mount root filesystem
  73   echo Press Alt-SysRq-B or hit the reset switch to reboot
  74   while : ; do sleep 6000 ; done
  75 fi
  76