#!/bin/sh
if [ "$1" = "-v" ];then echo "\$Header: /cvs/G/DRV/misc/App/scripts/bootlink,v 1.4 2008/04/28 07:52:01 zimoch Exp $";exit;fi
if [ $# -lt 2 ] || [ "$1" = "-?" ]
then 
    echo "using: $0 (<newbase>|-) <IOC> [<IOC2> [...]]"
    echo "change boot path for list of IOCs"
    echo "if <newbase> = \"-\" it shows the current links"
    exit
fi
if [ -z "$ORACLE_HOME" ] ; then
if [ -d /usr/oracle-9.2 ] ; then
        export ORACLE_HOME=/usr/oracle-9.2
else
        export ORACLE_HOME=/usr/oracle-8.1.7
	export LD_LIBRARY_PATH=$ORACLE_HOME/lib:$LD_LIBRARY_PATH
fi
fi

targetbase=$1
if [ "$(chkslsbase.sh $targetbase)" = "" ] && [ "$targetbase" != "-" ]
then
    echo -ne "first argument (\"$targetbase\") has to be one out of\n$SLSBASELIST\n"
    exit
fi
shift
for ioc in $*
do
    list=$(echo $(
    $ORACLE_HOME/bin/sqlplus -s gfa_public/pub01@GFAPRD << EOF
    SET HEADING OFF;
    SELECT BOOTPC,SLSBASE FROM HOSTS.IOC_LASTBOOTED WHERE  SYSTEM = '$ioc';
    EXIT
    EOF
    ))
    if [ "$list" = "no rows selected" ]
    then
	    echo "IOC $ioc not in bootinfo DB"
	    exit
    fi
    bootpc=$(echo $list|awk '{print $1}' );

    slsbase=$(echo $list|awk '{print $2}');

    #echo "BootPC=$bootpc"
    if [ "$slsbase" = "$targetbase" ]
    then
        echo "according to bootinfo, IOC $ioc already has SLSBASE=$slsbase"
        echo "continue anyway"
    fi
    old=$(ssh $bootpc readlink /ioc/$ioc)
    if [ "-" = "$targetbase" ]
    then
        old=$(ssh $bootpc readlink /ioc/$ioc)
        echo "link on $bootpc for $ioc is \"$old\""
        continue
    fi
    new="$targetbase/iocBoot/ioc/$ioc"
    if [ "$old" = "$new" ] 
    then
        echo "no operation: on $bootpc \"/ioc/$ioc\" already points to \"$old\""
        continue
    fi
    if [ -d "$new" ]
    then
        ssh $bootpc rm -f /ioc/$ioc
        ssh $bootpc ln -s $new /ioc/$ioc
        rep=$(ssh $bootpc readlink /ioc/$ioc)
        if [ "$rep" = "$new" ] 
        then
            echo "changed on $bootpc from \"$old\" to \"$new\""
        else
            echo "ERROR: change on $bootpc from \"$old\" to \"$new\" failed"
            echo "link points now to \"$req\". Check permissions:"
            ssh $bootpc ls -l /ioc/$ioc
        fi  
    else
        echo "target dir \"$tdir\" does not exist"
        continue
    fi
done