#!/usr/bin/perl -w
#use Data::Dumper;
use Getopt::Long;

sub usage{
    print "Usage: dhcphelper -h \n";
    print "\n";
    print "       dhcphelper -r|--rm -m|--mac <mac address> [ -a|--ip <ip address>] [ -n|--name <node name>]\n";
    print "       delete the dhcp lease of specified <mac>,<ip address> and <node name>\n";
    print "\n";
}

my $help;
my $rmop;
my $mac;
my $ip;
my $hostname;
GetOptions ("m|mac=s" => \$mac,    # numeric
            "a|ip=s"   => \$ip,      # string
            "n|name=s"   => \$hostname,      # string
            "r|rm"   => \$rmop,      # flag
            "h|help"  => \$help)   # flag
or &usage;

if($help){
    &usage;
    exit 0;
}elsif($rmop){
    my $out=qx(tabdump -w key==omapi -w username==xcat_key  passwd |tail -n1|awk -F, '{print \$2","\$3}');
    $out =~ s/("|\n)//g;
    my ($id,$passwd)=split(',',$out);
    if(-z "$id" || -z "$passwd" ){
        print "Error: no 'omapi' entry defined in passwd table!";
        exit 1;
    }
    
    my $omshell;
    open($omshell, "|/usr/bin/omshell >/dev/null");
    print $omshell "key "
      . $id . " \""
      . $passwd . "\"\n";
    print $omshell "connect\n";
    
    if($hostname){
        print $omshell "new host\n";
        print $omshell
          "set name = \"$hostname\"\n";    #Find and destroy conflict name
        print $omshell "open\n";
        print $omshell "remove\n";
        print $omshell "close\n";
    }
    
    if ($mac)
    {
        print $omshell "new host\n";
        print $omshell "set hardware-address = " . $mac
          . "\n";                      #find and destroy mac conflict
        print $omshell "open\n";
        print $omshell "remove\n";
        print $omshell "close\n";
    }
    
    if($ip){
       print $omshell "new host\n";
       print $omshell
        "set ip-address = $ip\n";    #find and destroy ip conflict
       print $omshell "open\n";
       print $omshell "remove\n";
       print $omshell "close\n";
    }
    close($omshell);
}else{
    &usage;
    exit 1;
}


#print "$mac-$ip-$hostname\n"
exit 0;