#!/bin/sh
# IBM(c) 2007 EPL license http://www.eclipse.org/legal/epl-v10.html
#####################################################
#
#   Generic xCAT post script for diskless nodes
#   This script is called in the following different palces:
#      updatenode -P ... --> xcatdsklspost 1 ...
#      updatenode -S --> xcatdsklspost 2 otherpkgs
#      moncfg rmcmon --> xcatdsklspost 3 configrmcnodes
#      node deployment  --> xcatdsklspost
#      statelite mode   --> xcatdsklspost 4
#
#####################################################
download_postscripts()
{
    server=$1
    if [ -z $server ]; then
	return 1;
    fi

    max_retries=5
    retry=0
    rc=1 
    while [ 0 -eq 0 ]; do
	wget -l inf -N -r --waitretry=10 --random-wait -T 60 ftp://$server/postscripts 2> /tmp/wget.log
        rc=$?
        
	if [ $rc -eq 0 ]; then
	    return 0;
        fi

	retry=$(($retry+1))
	if [ $retry -eq $max_retries ]; then
            break
	fi

	let sli=$RANDOM%20
	sleep $sli
    done
    return $rc
}

MODE=$1 

if [ ! `uname` == Linux ]; then
   MYDIR=`dirname $0`
   exec $MYDIR/xcatdsklspost.aix
   exit
fi
let SLI=$RANDOM%10
sleep $SLI

if [ ! -d /xcatpost ]; then
    mkdir -p /xcatpost; 
fi

if [ ! -d /tmp/postage ]; then
    mkdir -p /tmp/postage
fi
rm -R -f /xcatpost/*
rm -R -f /tmp/postage/*

#here we get all the postscripts.  Please do not change this behaviour because some scripts depend on others
cd /tmp/postage

argnum=$#;

if [ "$MODE" != "4" ]; then # not statelite mode
    downloaded=0;
    #open the xcatinfo file to look for the master if it is not set
    if [ -f /opt/xcat/xcatinfo ]; then
        SIP=`grep 'XCATSERVER' /opt/xcat/xcatinfo |cut -d= -f2`
        if [ -n "$SIP" ]; then
	        download_postscripts $SIP
	        if [ $? -eq 0 ]; then 
	            downloaded=1
	        fi
        fi
    fi   
else # for statelite mode
    # We have written the xCATSERVER info into the kernel command line!!
    for i in `cat /proc/cmdline`; do
        KEY=`echo $i | awk -F= '{print $1}'`
        if [ "$KEY" ==  "XCAT" ]; then
            TMP=`echo $i | awk -F= '{print $2}'`
            XCATSERVER=`echo $TMP | cut -d: -f1`
            echo "XCATSERVER=$XCATSERVER" > /opt/xcat/xcatinfo
            break
        fi
    done

    if [ -f /opt/xcat/xcatinfo ]; then
        SIP=`cut -d= -f2 /opt/xcat/xcatinfo`;
    else
        echo "xCAT management server IP can't be determined.\nexiting...";
        logger -t xCAT "xcatdsklspost:xCAT management server IP can't be determined.\nexiting...";
        exit;
    fi
fi

if [ "$MODE" != "4" ]; then # NOSTATELITE: NOT for statelite MODE

#try the -m if it is specified, -m is passed in the updatenode command
if [ $downloaded -eq 0 ]; then
   #get the -m
    while [ $# -gt 0 ]
    do
	case "$1" in
	    -m) SIP="$2"; break;;
	    -M) SIP="$2"; new_ms=$SIP;  break;;
	esac
	shift
    done
    if [ -n "$SIP" ]; then
	download_postscripts $SIP
	if [ $? -eq 0 ]; then 
	    downloaded=1
	fi
    fi
fi 


#try the dhcp server, this is used for initial boot for the node.
if [ $downloaded -eq 0 ]; then
  #setup $OSVER ,for SLES11
    if [ -e '/etc/SuSE-release' ]; then
	OSVER=`grep -h VERSION /etc/SuSE-release |awk '{print $3}'`
    fi
    SIPS=`grep -h dhcp-server-identifier /var/lib/dhclient/dhclient*.leases 2> /dev/null|awk '{print $3}'|sed -e 's/;//'`
    if [ -z "$SIPS" ]; then
	SIPS=`grep -h DHCPSID /var/lib/dhcpcd/*.info 2> /dev/null|awk -F= '{print $2}'|sed -e s/\'//g`
    fi
    SIP=`echo $SIPS|awk '{printf $NF}' | tail -n 1` #Pick one for wget
    if [ -n "$SIP" ]; then
	download_postscripts $SIP
	if [ $? -eq 0 ]; then 
	    downloaded=1
	fi
    elif [ -x "/sbin/dhcpcd" ]; then
        # New dhcpcd doesn't creates *.info files.
        for lease in $(ls "/var/lib/dhcpcd/"); do
            iface="$(echo "$lease" | sed -n -e 's/^dhcpcd-\(.*\)\.lease$/\1/p')"
            if [ -n "$iface" ]; then
                SIP="$(dhcpcd -q -T "$iface" | sed -n -e '/new_dhcp_server_identifier/ s/.*=//p')"
                if [ -n "$SIP" ]; then
                    download_postscripts $SIP
                    if [ $? -eq 0 ]; then
                        downloaded=1
                        break
                    fi
                fi
            fi
        done
    fi
fi


#no hope, now let's get out of here.
if [ $downloaded -eq 0 ]; then
    hn=`hostname`
    echo "Cannot download the postscripts from the xCAT server for node $hn"
    logger -t xCAT "xcatdsklspost:Cannot download the postscripts from the xCAT server for node $hn"
    exit  
fi

fi  #END NOSTATELITE

if grep 'rw /rw tmpfs ' /proc/mounts  >& /dev/null; then
    touch /var/lock/subsys/xcatmounts
    echo '#!/bin/bash' > /etc/rc6.d/K10xcatmounts
    echo umount -l /ro >> /etc/rc6.d/K10xcatmounts
    echo umount -l /rw >> /etc/rc6.d/K10xcatmounts
    chmod 755 /etc/rc6.d/K10xcatmounts
    ln -sf /etc/rc6.d/K10xcatmounts /etc/rc0.d/K10xcatmounts
fi


if [ "$MODE" != "4" ]; then
    
    #wget -l inf -N -r --waitretry=10 --random-wait --retry-connrefused -t 0 -T 60 ftp://$SIP/postscripts 2> /tmp/wget.log
    
    #mv $SIP/install/postscripts/* /xcatpost; 
    mv $SIP/postscripts/* /xcatpost; 
    rm -rf $SIP
else  # for statelite mode
    MAX=10
    TRIES=1
    while ! mount $SIP:/install/postscripts /xcatpost -r -n -o nolock
    do
        if [ "$TRIES" = "$MAX" ]
        then
            echo "can't mount $SIP:/install/postscripts. I give up... ">/dev/console
            logger -t xCAT "xcatdsklspost:Can't mount $SIP:/install/postscripts. exiting... "
            exit
        fi
        TRIES=`expr $TRIES + 1`
        S=`expr $RANDOM % 20`
        echo "Can't mount $SIP:/install/postscripts... Sleeping $S seconds then trying again" >/dev/console
        logger -t xCAT "xcatdsklspost:Can't mount $SIP:/install/postscripts... Sleeping $S seconds then trying again" 
        sleep $S
    done

fi

cd /xcatpost; 
PATH=/xcatpost:$PATH
export PATH
if [ "$MODE" != "4" ]; then
    chmod +x /xcatpost/*; # no effect for statelite mode, since the directory are readonly
fi
#echo "PATH=$PATH" 


if [ -x /usr/bin/openssl ]; then
     XCATSERVER="$SIP:3001"
     export XCATSERVER
     USEOPENSSLFORXCAT=1 #Though this is the only method going forward, flag to allow backward compatibility with 2.2 generated netboot images
     export USEOPENSSLFORXCAT
fi


/xcatpost/getpostscript.awk | sed  -e 's/<[^>]*>//g'|egrep -v '^ *$'|sed -e 's/^ *//' >  /tmp/mypostscript; 
MYCONT=`grep MASTER /tmp/mypostscript`
#echo "MYCONT=$MYCONT"
#if getpostscript.awk fails, the postscript will fall into infinit loop
#so one retry_number is added to avoid sunc a condition
MAX_RETRIES=10
RETRY=0
while [ -z "$MYCONT" ]; do
    RETRY=$(($RETRY+1))
    if [ $RETRY -eq $MAX_RETRIES ]
    then
        break
    fi

    let SLI=$RANDOM%10
    let SLI=10+$SLI
    sleep $SLI
    if [ "$MODE" != "4" ]; then
        for SIP in $SIPS; do #Attempt against several candidates
            if [ -x /usr/bin/openssl ]; then
                XCATSERVER="$SIP:3001"
                export XCATSERVER
                USEOPENSSLFORXCAT=1 #Though this is the only method going forward, flag to allow backward compatibility with 2.2 generated netboot images
                export USEOPENSSLFORXCAT
            fi
            /xcatpost/getpostscript.awk | sed  -e 's/<[^>]*>//g'|egrep -v '^ *$'|sed -e 's/^ *//' >  /tmp/mypostscript; 
            MYCONT=`grep MASTER /tmp/mypostscript`
            if [ ! -z "$MYCONT" ]; then
                break;
            fi
        done
    else    # for statelite mode
        /xcatpost/getpostscript.awk | sed  -e 's/<[^>]*>//g'|egrep -v '^ *$'|sed -e 's/^ *//' >  /tmp/mypostscript;
        MYCONT=`grep MASTER /tmp/mypostscript`
        if [ ! -z "$MYCONT" ]; then
            break;
        fi
    fi
#    echo "MYCONT=$MYCONT"
done

#save the MASTER into the xcatinfo file for node deployment case, 
#for updatenode case, only save it when -M is specified
if [ $argnum -eq 0 ]; then
    new_ms=`grep '^MASTER' /tmp/mypostscript |cut -d= -f2`
fi
if [ -n "$new_ms" ]; then
    if [ ! -f /opt/xcat/xcatinfo ]; then
	mkdir -p /opt/xcat
	touch /opt/xcat/xcatinfo
    fi
    grep 'XCATSERVER' /opt/xcat/xcatinfo 2>&1 > /dev/null
    if [ $? -eq 0 ]; then
	sed -i "s/XCATSERVER=.*/XCATSERVER=$new_ms/" /opt/xcat/xcatinfo
    else
	echo "XCATSERVER=$new_ms" >> /opt/xcat/xcatinfo
    fi
fi
    

# when called by the updatenode command
#modify the UPDATENODE flag to 1 
if [ $argnum -gt 0 ]; then
  TMP=`sed -e 's/UPDATENODE=0/UPDATENODE=1/g' /tmp/mypostscript`;
  echo "$TMP" > /tmp/mypostscript;
fi

# postscript name is specified with the updatenode
if [ $argnum -gt 2 ]; then
  POSTS=$3
  #remove all the postbootscripts
  TMP=`sed "/postbootscripts-start-here/,/postbootscripts-end-here/ d" /tmp/mypostscript`
  echo "$TMP" > /tmp/mypostscript
  #remove all the postscripts
  TMP=`sed "/postscripts-start-here/,/postscripts-end-here/ d" /tmp/mypostscript`
  echo "$TMP" > /tmp/mypostscript
  echo "# postscripts-start-here\n" >> /tmp/mypostscript
  #add requested postscripts in
  echo "$POSTS" | tr "," "\n" >> /tmp/mypostscript
  echo "# postscripts-end-here\n" >> /tmp/mypostscript
fi

#ADDSITEYUM is set by post.rh and post.rh.iscsi for full installtion
#if [[ "$ADDSITEYUM" = "1" ]]; then
#  TMP=`sed "/postscripts-start-here/ a addsiteyum" /tmp/mypostscript`
#  echo "$TMP" > /tmp/mypostscript
#fi

#MYCONT=`cat /tmp/mypostscript`
#echo "$MYCONT"

# use the run_ps subroutine to run the postscripts
TMP=`sed "/postscripts-start-here/,/postscripts-end-here/ s/\(.*\)/run_ps \1/;s/run_ps\s*#/#/;s/run_ps\s*$//" /tmp/mypostscript`
echo "
# subroutine used to run postscripts
run_ps () { 
 if [[ -f \$1 ]]; then 
  echo \"Running postscript: \$1\"
  OUTPUT=\`./\$1 2>&1\`
  if [[ -n \$OUTPUT ]]; then
    echo \"\$OUTPUT\"
  fi
 else
  echo \"Postscript \$1 does NOT exist.\"
 fi
}
# subroutine end

" > /tmp/mypostscript
echo "$TMP" >> /tmp/mypostscript
TMP=`sed "/postbootscripts-start-here/,/postbootscripts-end-here/ s/\(.*\)/run_ps \1/;s/run_ps\s*#/#/;s/run_ps\s*$//" /tmp/mypostscript`
echo "$TMP" > /tmp/mypostscript 

if [ $argnum -eq 0 ]; then
  #notify the server that we are done with netbooting
  CNS=`grep NODESTATUS= /tmp/mypostscript |awk -F = '{print $2}'`
  if [ -z "$CNS" ] || [ "$CNS" != "'0'" -a   "$CNS" != "'N'"  -a  "$CNS" != "'n'" ]; then
      echo "updateflag.awk \$MASTER 3002 \"installstatus booted\"" >> /tmp/mypostscript
  fi
fi

DHCP_TMP=`sed 's/\(DHCPINTERFACES=\)\(.*\)$/\1"\2"/' /tmp/mypostscript`
echo "$DHCP_TMP" > /tmp/mypostscript

chmod +x /tmp/mypostscript
if [ -x /tmp/mypostscript ];then
   /tmp/mypostscript
fi
#rm -f /tmp/mypostscript

#tell user it is done when this is called by updatenode command
if [ $argnum -gt 0 ]; then
  echo "returned from postscript"
fi