#!/bin/sh
# IBM(c) 2007 EPL license http://www.eclipse.org/legal/epl-v10.html
for parm in `cat /proc/cmdline`; do
  key=`echo $parm|awk -F= '{print $1}'`
  if [ "$key" == "xcatd" ]; then
    XCATDEST=`echo $parm|awk -F= '{print $2}'`
  fi
done
export XCATMASTER=`echo $XCATDEST | awk -F: '{print $1}'`
export XCATPORT=`echo $XCATDEST | awk -F: '{print $2}'`


while :; do
  DESTINY=`grep destiny /tmp/destiny | awk -F'>' '{print $2}'|awk -F'<' '{print $1}'`
  DEST=`echo $DESTINY|awk -F= '{print $1}'` #No bash, no tricks
  TARG=`echo $DESTINY|awk -F= '{print $2}'` #No bash, no tricks
  DESTINY=`echo $DESTINY|awk '{print $1}'` #No bash, no tricks
  if [ $DESTINY == "standby" ]; then
    echo "Server notified us of standby condition, please check chain table".
    echo "Retrying destiny in 15 seconds"
    usleep 15000000 # something may be transiently wrong, check back in 15 seconds
    while ! getdestiny; do
        echo "Retrying destiny retrieval"
        usleep 300000
    done
    exec $0
  fi
  if [ $DESTINY == "shell" ]; then
    echo "Server notified us to stay in shell state, stopping destiny requests"
    exit
  fi
  if [ $DESTINY == "discover" ]; then
    echo "MAC discovery begins"
    minixcatd.awk &
    usleep 500000 #Mitigate occurrances of 'failed to notify node'
    while [ ! -r /restart ]; do
      ifconfig -a|grep HWaddr|grep -v sit|awk '{print $1 "|" $5}'
      MTM="unknown"
      SERIAL="unknown"
      if [ -x /bin/vpddecode ]; then
        MTM=`(/bin/vpddecode|grep Type || echo "unknown unknown: unknown")|awk '{print $3}'`
        SERIAL=`(/bin/vpddecode|grep "Box Serial" || echo "unknown unknown unknown: unknown")|awk '{print $4}'`
      fi
      if [ "$MTM" == "unknown" -a -x /bin/dmidecode ]; then #This gets a bit hackish... iDataplex
        MTM=`dmidecode |grep -A4 "^System Information"|grep "Product Name"|awk -F'[' '{print $2}'|awk -F']' '{print $1}'`
        SERIAL=`dmidecode |grep -A4 "^System Information"|grep "Serial Number"|awk -F: '{print $2}'`
      fi
      if [ -r /proc/device-tree/model ]; then
        MTM=`cat /proc/device-tree/model |awk -F, '{print $2}'`
      fi
      (
      echo "<xcatrequest>"
      echo "<command>findme</command>"
      echo "<arch>"`uname -m`"</arch>"
      for i in `ifconfig -a|grep HWaddr|grep -v sit|awk '{print $1 "|" $5}'`; do 
        IFACE=`echo $i|awk -F'|' '{print $1}'`
        DRIVER=`ethtool -i $IFACE|grep ^driver|awk '{print $2}'`
        echo "<mac>$DRIVER|$i</mac>"
      done
      modprobe ipmi_devintf
      if modprobe ipmi_si; then
        echo "<mac>bmc|bmc|"`ipmitool lan print 1|grep ^MAC|awk '{print $4}'`"</mac>"
      fi
      rmmod ipmi_si
      rmmod ipmi_devintf
      if [ "$MTM" != "unknown" ]; then
        echo "<mtm>$MTM</mtm>"
      fi
      if [ "$SERIAL" != "unknown" ]; then
        echo "<serial>$SERIAL</serial>"
      fi
      echo "</xcatrequest>" ) > /tmp/discout
      cat /tmp/discout | udpcat.awk $XCATMASTER $XCATPORT & #can't figure out how to make a hung gawk behave..
      if usleep 8000000 #Give the preferred method 5 seconds to complete before resorting
      then
        #if usleep succeeded, that means it wasn't killed and therefore, no answer yet
        killall udpcat.awk #reap hung ones
        cat /tmp/discout | udpcat.awk `cat /tmp/dhcpserver` $XCATPORT &
        usleep 8000000
      fi
      killall udpcat.awk #reap hung ones
    done
    #Discovery complete, restart requested.
    exec /bin/restart
  fi
  if [ $DESTINY == "reboot" -o $DESTINY == "boot" ]; then
    while ! nextdestiny ; do
        echo "Retrying next destiny..."
    done
    reboot -f
  fi
  if [ $DEST == "runcmd" ]; then
    while ! nextdestiny ; do
        echo "Retrying next destiny..."
    done
    $TARG
  fi
  if [ $DESTINY == "install" -o $DESTINY == "netboot" ]; then
    IMGSERVER=`grep imgserver /tmp/destiny | awk -F'>' '{print $2}'|awk -F'<' '{print $1}'`
    INITRD=`grep initrd /tmp/destiny | awk -F'>' '{print $2}'|awk -F'<' '{print $1}'`
    KERNEL=`grep kernel /tmp/destiny | awk -F'>' '{print $2}'|awk -F'<' '{print $1}'`
    KCMD=`grep kcmdline /tmp/destiny | awk -F'>' '{print $2}'|awk -F'<' '{print $1}'`
    wget http://$IMGSERVER/tftpboot/$KERNEL -O /tmp/kernel
    wget http://$IMGSERVER/tftpboot/$INITRD -O /tmp/initrd
    #START getting ready for kexec
    for mod in `lsmod|awk '{print $1}'|grep -v Module`; do
        rmmod $mod
    done
    kexec -f --append="$KCMD" --initrd=/tmp/initrd /tmp/kernel
    reboot -f #If script is here, kexec failed, reboot in case it wasn't a linux kernel and let the boot loader handle it instead
  fi
  if [ $DEST == "runimage" ]; then
    mkdir /tmp/$TARG
    cd /tmp/$TARG
    wget $TARG
    while ! nextdestiny ; do
        echo "Retrying next destiny..."
    done
    tar zxvf $TARG
    /tmp/$TARG/runme.sh
    cd -
  fi
done