#!/usr/bin/env perl
BEGIN
{
    $::XCATROOT = $ENV{'XCATROOT'} ? $ENV{'XCATROOT'} : '/opt/xcat';
}
use lib "$::XCATROOT/lib/perl";

use File::Basename;
use File::Path;
use File::Copy;
use File::Find;
use Getopt::Long;
use Cwd qw(realpath);
#use strict;
Getopt::Long::Configure("bundling");
Getopt::Long::Configure("pass_through");

my $prinic; #TODO be flexible on node primary nic
my $othernics; #TODO be flexible on node primary nic
my $netdriver;
my @yumdirs;
my $arch;
my %libhash;
my @filestoadd;
my $profile;
my $osver;
my $pathtofiles=dirname($0);
my $fullpath=realpath($pathtofiles);
my $name = basename($0);
my $onlyinitrd=0;
if ($name =~ /geninitrd/) {
   $onlyinitrd=1;
}
my $rootlimit;
my $tmplimit;
my $installroot = "/install";
my $kernelver = ""; #`uname -r`;
my $basekernelver; # = $kernelver;
my $customdir=$fullpath;
$customdir =~ s/.*share\/xcat/$installroot\/custom/;
my $imagename;
my $pkglist;
my $srcdir;
my $destdir;
my $srcdir_otherpkgs;
my $otherpkglist;
my $postinstall_filename;
my $rootimg_dir;

sub xdie {
   system("rm -rf /tmp/xcatinitrd.$$");
   die @_;
}

#-- fetch current version form CVS (overwrite locally changed versions)
# if (opendir(CVS,"$pathtofiles/CVS")){
#   close CVS;
#   my $cvsout = qx/cd $pathtofiles; cvs update -C 2>&1/;
#   chomp $cvsout;
#   if ( $cvsout ne "cvs update: Updating ." ) {
#     print "Difference of local copy from CVS detected\n";
#     print $cvsout,"\n";
#     print "Trying to re-run $name\n";
#     print("$pathtofiles/$name ",join(" ",@ARGV),"\n");
#     exec("$pathtofiles/$name",@ARGV);
#   }
# }


$SIG{INT} = $SIG{TERM} = sub { xdie "Interrupted" };
GetOptions(
   'a=s' => \$arch,
   'p=s' => \$profile,
   'o=s' => \$osver,
   'n=s' => \$netdriver,
   'i=s' => \$prinic,
   'r=s' => \$othernics,
   'l=s' => \$rootlimit,
   't=s' => \$tmplimit,
   'k=s' => \$kernelver
);
if (@ARGV > 0) {
    $imagename=$ARGV[0];
    if ($arch or $osver or $profile) {
	print "-o, -p and -a options are not allowed when a image name is specified.\n";
        exit 1;
    }
    #load the module in memory
    eval {require("$::XCATROOT/lib/perl/xCAT/Table.pm")};
    if ($@) {
	print $@;
	exit 1;
    }
   
    #get the info from the osimage and linux 
    my $osimagetab=xCAT::Table->new('osimage', -create=>1);
    if (!$osimagetab) {
	print "The osimage table cannot be opened.\n";
	exit 1;
    }
    my $linuximagetab=xCAT::Table->new('linuximage', -create=>1);
    if (!$linuximagetab) {
	print "The linuximage table cannot be opened.\n";
	exit 1;
    }
    (my $ref) = $osimagetab->getAttribs({imagename => $imagename}, 'osvers', 'osarch', 'profile', 'provmethod');
    if (!$ref) {
	print "Cannot find image \'$imagename\' from the osimage table.\n";
	exit 1;
    }
    (my $ref1) = $linuximagetab->getAttribs({imagename => $imagename}, 'pkglist', 'pkgdir', 'otherpkglist', 'otherpkgdir', 'postinstall', 'rootimgdir');
    if (!$ref1) {
	print "Cannot find $imagename from the linuximage table\n";
	exit 1;
    }

    $osver=$ref->{'osvers'};
    $arch=$ref->{'osarch'};
    $profile=$ref->{'profile'};
    my $provmethod=$ref->{'provmethod'};
    
    unless ($osver and $arch and $profile and $provmethod) {
	print"osimage.osvers, osimage.osarch, osimage.profile and osimage.provmethod must be specified for the image $imagename in the database.\n";
	exit 1;
    }

    if ($provmethod ne 'netboot') {
	print "\'$imagename\' cannot be used to build diskless image. Make sure osimage.provmethod is 'netboot'.";
	exit 1;
    }

    if (! $ref1->{'pkglist'}) {
	print"A .pkglist file must be specified for image \'$imagename\' in the linuximage table.\n";
        exit 0;
    }
    $pkglist =$ref1->{'pkglist'};

    $srcdir=$ref1->{'pkgdir'};
    if ($srcdir) { $srcdir="$srcdir/1"; }
    $srcdir_otherpkgs=$ref1->{'otherpkgdir'};
    $otherpkglist=$ref1->{'otherpkglist'};
    $postinstall_filename=$ref1->{'postinstall'};
    $destdir=$ref1->{'rootimgdir'};
}

if (!$arch) {
    my $arch = `uname -m`;
    chomp($arch);
    if ($arch =~ /i.86$/) {
	$arch = "x86";
    }
}

if (!$srcdir) { 
    $srcdir="$installroot/$osver/$arch/1";
}

if (!$srcdir_otherpkgs) { 
    $srcdir_otherpkgs = "$installroot/post/otherpkgs/$osver/$arch"; 
}

if (!$destdir)
{
    $destdir="$installroot/netboot/$osver/$arch/$profile";
}
$rootimg_dir="$destdir/rootimg";


#Default to the first kernel found in the install image if nothing specified explicitly.
#A more accurate guess than whatever the image build server happens to be running
#If specified, that takes precedence.
#if image has one, that is used
#if all else fails, resort to uname -r like this script did before
my @KVERS= <$rootimg_dir/lib/modules/*>;
if (scalar(@KVERS)) {
    $basekernelver = basename($KVERS[0]);
}
unless ($basekernelver) {
    $basekernelver = `uname -r`;
}
unless ($kernelver) {
    $kernelver=$basekernelver;
}
chomp($kernelver);
unless ($osver and $profile and $netdriver and $prinic) {
   print 'Usage: genimage -i <nodebootif> -n <nodenetdrivers> [-r <otherifaces>] -k <KERNELVER> -o <OSVER> -p <PROFILE> -a <ARCH>'."\n";
   print '       genimage -i <nodebootif> -n <nodenetdrivers> [-r <otherifaces>] -k <KERNELVER> <imagename>'."\n";
   print "Examples:\n";
   print " genimage -i eth0 -n tg3 -o centos5.1 -p compute\n";
   print " genimage -i eth0 -r eth1,eth2 -n tg3,bnx2 -o centos5.1 -p compute\n";
   print " genimage -i eth0 -ntg3 myimagename\n";
   exit 1;
}
my @ndrivers;
foreach (split /,/,$netdriver) {
   unless (/\.ko$/) {
      s/$/.ko/;
   }
   if (/^$/) {
      next;
   }
   push @ndrivers,$_;
}
unless (grep /af_packet/,@ndrivers) {
   unshift(@ndrivers,"af_packet.ko");
}

my $osver_host;
if(`grep VERSION /etc/SuSE-release` =~ /VERSION = (\d+)/) {
    $osver_host=$1;
} else {
    $osver_host=11;
}


unless ($onlyinitrd) {
   my %extra_hash=get_extra_package_names();


   mkpath "$rootimg_dir/etc";
   mkpath "$rootimg_dir/dev";
   #system "mount -o bind /dev $rootimg_dir/dev";
   system "mknod $rootimg_dir/dev/zero c 1 5";
   system "mknod $rootimg_dir/dev/null c 1 3"; #that's neccessary for SLES11
   open($fd,">>","$rootimg_dir/etc/fstab");
   print $fd "#Dummy fstab for rpm postscripts to see\n";
   close($fd);
   if($osver_host == 11) {#zypper in SLES11 is different
	   if(-e "$rootimg_dir/etc/zypp/repos.d/$osver.repo") {
		   system("rm -rf $rootimg_dir/etc/zypp/repos.d/$osver.repo");
	   }
	   system("zypper -R $rootimg_dir ar file:$srcdir $osver");
   }else {
	   system("zypper -R $rootimg_dir sa file:$srcdir");
   }

   #remove the old repository for extra packages
   my $result=`zypper -R $rootimg_dir sl |grep otherpkg|cut -f2 -d '|'|tr "\n" " "`;
   if ($result =~ /\S/) {
       system("zypper -R $rootimg_dir sd $result");
   }

   #add the new repository for extra packages
   my $extrapkgnames; 
   if($osver_host == 11) {	#SLES11
      if(-e "$rootimg_dir/etc/zypp/repos.d/otherpkg.repo") {
	  system("rm -rf $rootimg_dir/etc/zypp/repos.d/otherpkg.repo");
      }
   }
   my $index=1;
   foreach (keys(%extra_hash)) {
       if (($_ eq "PRE_REMOVE") || ($_ eq "POST_REMOVE")) { next;} 
       my $whole_path="$srcdir_otherpkgs/$_";
       if (-r "$srcdir_otherpkgs/$_/repodata/repomd.xml") {
	   if($osver_host == 11) { 
	       system("zypper -R $rootimg_dir ar file:$srcdir_otherpkgs/$_  otherpkg$index");
	   }else {
	       system("zypper -R $rootimg_dir sa file:$srcdir_otherpkgs/$_");
	   }
       } else {
	   if($osver_host == 11) { 
	       system("zypper -R $rootimg_dir ar -t Plaindir file:$srcdir_otherpkgs/$_  otherpkg$index");
	   }else {
	       system("zypper -R $rootimg_dir sa -t Plaindir file:$srcdir_otherpkgs/$_");
	   }
       }
       $index++;

       my $pa=$extra_hash{$_};
       $extrapkgnames .= " " . join(' ', @$pa);
   }

   #-- add custom repositories to the image  
   #TODO: should we add the support to otherpkgs for this? we have too many list files and it seems only SLES supports this
   my $repolist;
   if ( -r "$pathtofiles/$profile.$osver.$arch.repolist") {
       $repolist = "$pathtofiles/$profile.$osver.$arch.repolist";
   }elsif ( -r "$pathtofiles/$profile.$osver.repolist") {
       $repolist = "$pathtofiles/$profile.$osver.repolist";
   }elsif ( -r "$pathtofiles/$profile.repolist") {
       $repolist = "$pathtofiles/$profile.repolist";
   }

   if ( -r "$repolist") {
     print "Reading custom repositories\n";
     open($repoconfig,"<","$repolist");
     while (<$repoconfig>) {
       chomp;
       next if /^\s*#/;
       my ($repotype,$repourl,$repoalias) = split m/\|/;
       system("zypper -R $rootimg_dir ar $repourl $repoalias");
     }
   }

   #my $yumcmd = "yum -y -c /tmp/genimage.$$.yum.conf --installroot=$rootimg_dir --disablerepo=* ";
   #$yumcmd .= "install ";
   #mkpath("$rootimg_dir/var/lib/yum");
   my $yumcmd;
   if($osver =~ /sles11/ && $osver_host == 11) {
       $yumcmd = "zypper -R $rootimg_dir install -l "; #add -l for SLES11
   }else {
        $yumcmd = "zypper -R $rootimg_dir install ";
   }
   if (!$imagename) {
       $pkglist= get_pkglist_file_name($customdir);
       if (!$pkglist) {
	   $pkglist= get_pkglist_file_name($pathtofiles);
       } 
   }
   #print "pkglist=$pkglist\n";

   if (!$pkglist) {
      print "Unable to find package list for $profile!";
      exit 1;
   }

   my $pkgnames;
   open($yumconfig,"<","$pkglist");
   while (<$yumconfig>) {
      chomp; 
      s/\s*#.*//;      #-- remove comments 
      next if /^\s*$/; #-- skip empty lines
      $pkgnames .= $_ . " ";
   }
   close($yumconfig);
   

   #$yumcmd =~ s/ $/\n/;
   #print "$yumcmd $pkgnames\n";
   my $rc = system("$yumcmd $pkgnames");
   if ($rc) { 
      print "zypper invocation failed\n";
      exit 1;
   }

   #remove the packages that are specified in the otherpkgs.list files with leading '-'
   my $yumcmd_remove= "zypper -R $rootimg_dir remove "; 
   if ((%extra_hash) && (exists ($extra_hash{'PRE_REMOVE'}))) {
       my $pa=$extra_hash{'PRE_REMOVE'};
       my $rm_packges= join(' ', @$pa);
       if ($rm_packges) {
	   $rc = system("$yumcmd_remove $rm_packges");
       }
   }
   

   #add extra packages in the list
   if ($extrapkgnames) {
       #print "$yumcmd $extrapkgnames\n";
       $rc = system("$yumcmd $extrapkgnames");
       if ($rc) { 
	   print "zypper invocation failed\n";
	   exit 1;
       }
   }

   #remove the packages that are specified in the otherpkgs.list files with leading '--'
   if ((%extra_hash) && (exists ($extra_hash{'POST_REMOVE'}))) {
       my $pa=$extra_hash{'POST_REMOVE'};
       my $rm_packges= join(' ', @$pa);
       if ($rm_packges) {
	   $rc = system("$yumcmd_remove $rm_packges");
       }
   }


   postscripts(); #run 'postscripts'
}
unlink "/tmp/genimage.$$.yum.conf";

#-- run postinstall script
if (!$imagename) {
    $postinstall_filename= get_postinstall_file_name($customdir);
    if (!$postinstall_filename) {
	$postinstall_filename= get_postinstall_file_name($pathtofiles);
    }
} 

if (($postinstall_filename) && (-x $postinstall_filename)) {
    my $rc = system($postinstall_filename, $rootimg_dir,$osver,$arch,$profile);
    if($rc) {
        print "postinstall script failed\n";
        exit 1;
    }
}

#some rpms mounts the imageroot/proc on the /proc, need to release it, 
#otherwise got kernal panic when installing 
#sometimes, the proc fs is not mounted, so one warning/error message will display,
#and I add one check point here.
my $MTABFD;
open MTABFD, "/etc/mtab";
my @lines = <MTABFD>;
close MTABFD;

my $ret = grep m{$rootimg_dir/proc}, @lines;
if($ret > 0) {
    system("umount $rootimg_dir/proc");
}

mkinitrd();


sub getlibs {
	my $file = shift;
	my $liblist = `chroot $rootimg_dir ldd $file`;
	my @libs = split/\n/,$liblist;
	my @return;
	foreach (@libs) {
      unless (/=>/) {
         (my $wjnk, my $lib,my $jnk) = split /\s+/,$_,3;
         $lib =~ s/^\///;
         $libhash{$lib}=1;
         next;
      }
		(my $temp1,my $temp2) = split />/,$_,2;
		(my $whitespace,$temp1,$temp2) = split /\s+/,$temp2,4;
		unless ($temp1 =~ /\//) {
			next;
		}
      $temp1 =~ s/^\///;
		$libhash{$temp1}=1;
   }
}

sub mkinitrd {
	mkpath("/tmp/xcatinitrd.$$/bin");
	if($basekernelver eq $kernelver) {
        if (-f "$rootimg_dir/boot/vmlinuz-$kernelver") {
		    rename(<$rootimg_dir/boot/vmlinuz*>,"$destdir/kernel");
	         } elsif (-f "$rootimg_dir/boot/vmlinux-$kernelver"){
                    rename(<$rootimg_dir/boot/vmlinux*>,"$destdir/kernel");
                 }
        }
	else {
	    if(-r "$rootimg_dir/boot/vmlinuz-$kernelver") {
		    rename("$rootimg_dir/boot/vmlinuz-$kernelver","$destdir/kernel");
        } elsif(-r "$rootimg_dir/boot/vmlinux-$kernelver") {
            rename("$rootimg_dir/boot/vmlinux-$kernelver","$destdir/kernel");
        }  elsif(-r "/boot/vmlinuz-$kernelver") {
		    copy("/boot/vmlinuz-$kernelver","$destdir/kernel");
	    } elsif(-r "/boot/vmlinux-$kernelver") {#for SLES10,11
			copy("/boot/vmlinux-$kernelver","$destdir/kernel");
	    }
	    else {
		    xdie("Cannot read /boot/vmlinuz-$kernelver");
	    }
	}
	symlink("bin","/tmp/xcatinitrd.$$/sbin");
	mkpath("/tmp/xcatinitrd.$$/usr/bin");
	mkpath("/tmp/xcatinitrd.$$/usr/sbin");
	mkpath("/tmp/xcatinitrd.$$/usr/lib");
	mkpath("/tmp/xcatinitrd.$$/usr/lib64");
	mkpath("/tmp/xcatinitrd.$$/lib/firmware");
	mkpath("/tmp/xcatinitrd.$$/tmp");
	mkpath("/tmp/xcatinitrd.$$/var/run");
	mkpath("/tmp/xcatinitrd.$$/lib64/firmware");
	if($osver =~ /sles/ && $arch eq "ppc64") {#SLES for Power6
	    mkpath("/tmp/xcatinitrd.$$/lib64/power6");
	}
	mkpath("/tmp/xcatinitrd.$$/lib/power6");#SLES10
	mkpath("/tmp/xcatinitrd.$$/lib/mkinitrd/bin");
	mkpath("/tmp/xcatinitrd.$$/proc");
	mkpath("/tmp/xcatinitrd.$$/sys");
	mkpath("/tmp/xcatinitrd.$$/dev/mapper");
	mkpath("/tmp/xcatinitrd.$$/sysroot");
	mkpath("/tmp/xcatinitrd.$$/etc/ld.so.conf.d");
	mkpath("/tmp/xcatinitrd.$$/var/lib/dhcpcd");
	my $inifile;
	open($inifile,">","/tmp/xcatinitrd.$$/init");
	print $inifile "#!/bin/bash -x\n";
	print $inifile "mount -t proc /proc /proc\n";
	print $inifile "mount -t sysfs /sys /sys\n";
   print $inifile "mount -o mode=0755 -t tmpfs /dev /dev\n";
   print $inifile "mkdir /dev/pts\n";
   print $inifile "mount -t devpts -o gid=5,mode=620 /dev/pts /dev/pts\n";
   print $inifile "mkdir /dev/shm\n";
   print $inifile "mkdir /dev/mapper\n";

   print $inifile "mknod /dev/random c 1 8\n";
   print $inifile "mknod /dev/urandom c 1 9\n";
   print $inifile "mknod /dev/null c 1 3\n";
   print $inifile "mknod /dev/zero c 1 5\n";
   print $inifile "mknod /dev/systty c 4 0\n";
   print $inifile "mknod /dev/tty c 5 0\n";
   print $inifile "mknod /dev/console c 5 1\n";
   print $inifile "mknod /dev/ptmx c 5 2\n";
   print $inifile "mknod /dev/rtc c 10 135\n";
   print $inifile "mknod /dev/tty0 c 4 0\n";
   print $inifile "mknod /dev/tty1 c 4 1\n";
   print $inifile "mknod /dev/tty2 c 4 2\n";
   print $inifile "mknod /dev/tty3 c 4 3\n";
   print $inifile "mknod /dev/tty4 c 4 4\n";
   print $inifile "mknod /dev/tty5 c 4 5\n";
   print $inifile "mknod /dev/tty6 c 4 6\n";
   print $inifile "mknod /dev/tty7 c 4 7\n";
   print $inifile "mknod /dev/tty8 c 4 8\n";
   print $inifile "mknod /dev/tty9 c 4 9\n";
   print $inifile "mknod /dev/tty10 c 4 10\n";
   print $inifile "mknod /dev/tty11 c 4 11\n";
   print $inifile "mknod /dev/tty12 c 4 12\n";
   print $inifile "mknod /dev/ttyS0 c 4 64\n";
   print $inifile "mknod /dev/ttyS1 c 4 65\n";
   print $inifile "mknod /dev/ttyS2 c 4 66\n";
   print $inifile "mknod /dev/ttyS3 c 4 67\n";
   foreach (@ndrivers) {
      print $inifile "insmod /lib/$_\n";
   }
   print $inifile <<EOMS;
netstart
ip addr add dev lo 127.0.0.1/8
ip link set lo up
cd /
for i in `cat /proc/cmdline`; do
   KEY=`echo \$i |awk -F= '{print \$1}'`
   if [ "\$KEY" == 'imgurl' ]; then
      VALUE=`echo \$i |awk -F= '{print \$2}'`
      if [ "http" == "`echo \$VALUE|awk -F: '{print \$1}'`" ]; then
        #NOTE needs FT retry code to scale
        #NOTE: should prob have max count
        FILENAME=`echo \$VALUE|awk -F/ '{print \$NF}'`
        while [ ! -r "\$FILENAME" ]; do
          echo Getting \$VALUE...
          if ! wget \$VALUE; then
            sleep 5 #should be random, exponential for scale
            rm -f \$FILENAME
          fi
        done
        NFS=0
      fi
      if [ "nfs" == "`echo \$VALUE|awk -F: '{print \$1}'`" ]; then
        NFS=1
        SERVER=`echo \$VALUE|awk -F/ '{print \$3}'`
        ROOTDIR=`echo \$VALUE|awk -F/ '{for(i=4;i<=NF;i++) printf "/%s",\$i}'`
      fi
   fi
done
if [ "\$NFS" = "1" ]; then
  echo Setting up nfs with ram overlay.
  mknod /dev/loop0 b 7 0
  mkdir -p /ro
  mkdir -p /rw
  #NOTE: should prob have max count
  while [ ! -d /ro/bin ]; do
    echo mounting \$SERVER:\$ROOTDIR on /ro
    mount \$SERVER:\$ROOTDIR /ro -r -n -o nolock,rsize=32768,udp,nfsvers=3,timeo=14
    sleep 5 #should be random, exponential for scale
  done
  mount -t tmpfs rw /rw
  mkdir -p /rw/etc
  mkdir -p /rw/var/lib/dhcpcd
  mount -t aufs -o dirs=/rw:/ro mergedroot  /sysroot
  mkdir -p /sysroot/ro
  mkdir -p /sysroot/rw
  mount --move /ro /sysroot/ro
  mount --move /rw /sysroot/rw
elif [ -r /rootimg.sfs ]; then
  echo Setting up squashfs with ram overlay.
  mknod /dev/loop0 b 7 0
  mkdir -p /ro
  mkdir -p /rw
  mount -t squashfs /rootimg.sfs /ro
  mount -t tmpfs rw /rw
  mount -t aufs -o dirs=/rw:/ro mergedroot /sysroot
  mkdir -p /sysroot/ro
  mkdir -p /sysroot/rw
  mount --move /ro /sysroot/ro
  mount --move /rw /sysroot/rw
EOMS
   print $inifile "elif [ -r /rootimg.gz ]; then\n";
   print $inifile "echo Setting up RAM-root tmpfs.\n";
   if ($rootlimit) {
      print $inifile "  mount -o size=$rootlimit -t tmpfs rootfs /sysroot\n";
   } else {
      print $inifile "  mount -t tmpfs rootfs /sysroot\n";
   }
   print $inifile "  cd /sysroot\n";
   print $inifile "  echo -n \"Extracting root filesystem:\"\n";
   print $inifile "  if [ -x /bin/cpio ]; then\n";
   print $inifile "  zcat /rootimg.gz |/bin/cpio -idum\n";
   print $inifile "  else\n";
   print $inifile "  zcat /rootimg.gz |cpio -idum\n";
   print $inifile "  fi\n";
   print $inifile "  echo Done\n";
   print $inifile "else\n";
   print $inifile "  echo -n Failed to download image, panicing in 5...\n";
   print $inifile "  for i in 4 3 2 1 0; do\n";
   print $inifile "    /bin/sleep 1\n";
   print $inifile "    echo -n \$i...\n";
   print $inifile "  done\n";
   print $inifile "  echo\n";
 print $inifile <<EOMS;
  echo "You're dead.  rpower nodename reset to play again.

* Did you packimage with -m cpio, -m squashfs, or -m nfs?
* If using -m squashfs did you include aufs.ko with geninitrd?
  e.g.:  -n tg3,squashfs,aufs,loop
* If using -m nfs did you export NFS and sync rootimg?  And
  did you include the aufs and nfs modules in the proper order:
  e.g.:  -n tg3,aufs,loop,sunrpc,lockd,nfs_acl,nfs

"
  sleep 5
EOMS
   print $inifile "  exit\n";
   print $inifile "fi\n";
   print $inifile "cd /\n";
   print $inifile "mkdir /sysroot/var/lib/dhcpcd/\n";	#neccessary for SLES11, not sure for SLES10
   print $inifile "cp /var/lib/dhcpcd/* /sysroot/var/lib/dhcpcd/\n";
   print $inifile "cp /etc/resolv.conf /sysroot/etc/\n";
   print $inifile "cp /etc/HOSTNAME /sysroot/etc/\n";
   print $inifile "mknod /sysroot/dev/console c 5 1\n";
   print $inifile "exec /lib/mkinitrd/bin/run-init -c /dev/console /sysroot /sbin/init\n";
   close($inifile);
   open($inifile,">"."/tmp/xcatinitrd.$$/bin/netstart");
   print $inifile "#!/bin/bash\n";
   print $inifile "dhcpcd $prinic\n";

   #-- Bring other NICs up in /bin/netstart in initrd for NIC failover
   foreach (split /,/,$othernics) {
      if (/^$/) { next; }
      print $inifile "dhcpcd $_\n";
   }

   print $inifile <<END;
cat /var/lib/dhcpcd/*info | grep DOMAIN | uniq | awk -F= '{print \"search\",\$2}' | sed \"s/'//g\" >> /etc/resolv.conf
cat /var/lib/dhcpcd/*info | grep HOSTNAME | uniq | awk -F= '{print \$2}'| sed \"s/'//g\" >> /etc/HOSTNAME
for names in \$(cat /var/lib/dhcpcd/*info | grep DNS | uniq | awk -F= '{print \$2}' | sed 's/,/\\n/'); do
  echo nameserver \$names >> /etc/resolv.conf
done
END

   close($inifile);
	chmod(0755,"/tmp/xcatinitrd.$$/init");
	chmod(0755,"/tmp/xcatinitrd.$$/bin/netstart");
   @filestoadd=();
   foreach (@ndrivers) {
     if (-f "$customdir/$_") {
         push @filestoadd,[$_,"lib/$_"];
     } elsif (-f "$pathtofiles/$_") {
         push @filestoadd,[$_,"lib/$_"];
     }
   }
   foreach ("usr/bin/grep","bin/cpio","bin/sleep","bin/mount","sbin/dhcpcd","bin/bash","sbin/insmod","bin/mkdir","bin/mknod","sbin/ip","bin/cat","usr/bin/awk","usr/bin/wget","bin/cp","usr/bin/cpio","usr/bin/zcat","usr/bin/gzip","lib/mkinitrd/bin/run-init","usr/bin/uniq","usr/bin/sed") {
      getlibs($_); #there's one small bug for getlibs
      push @filestoadd,$_;
   }
   if ($arch =~ /x86_64/) {
      push @filestoadd,"lib64/libnss_dns.so.2";
   }
   else {
      push @filestoadd,"lib/libnss_dns.so.2";
   }
   push @filestoadd,keys %libhash;
	if($basekernelver ne $kernelver) {
		system("rm -rf $rootimg_dir/lib/modules/$basekernelver");
        unless (-d "$rootimg_dir/lib/modules/$kernelver") {
		    if(-d "/lib/modules/$kernelver") {
		    	system("cd /lib/modules;cp -r $kernelver $rootimg_dir/lib/modules/");
		    }
		    else {
		    	xdie("Cannot read /lib/modules/$kernelver");
		    }
        }
	}
   find(\&isnetdriver, <$rootimg_dir/lib/modules/$kernelver/*>);
   foreach (@filestoadd) {
      if (ref($_)) {
         #print "$_->[0], $_->[1]\n";
         my $srcpath = "$rootimg_dir/".$_->[0];
         if (-f "$customdir/".$_->[0]) {
            $srcpath="$customdir/".$_->[0];
         } elsif (-f "$pathtofiles/".$_->[0]) {
            $srcpath="$pathtofiles/".$_->[0];
         }
         copy($srcpath,"/tmp/xcatinitrd.$$/".$_->[1]);
         chmod 0755,"/tmp/xcatinitrd.$$/".$_->[1];
      } else {
         #print "$_\n";
         my $srcpath = "$rootimg_dir/$_";
         if (-f "$customdir/$_") {
            $srcpath = "$customdir/$_";
         } elsif (-f "$pathtofiles/$_") {
            $srcpath = "$pathtofiles/$_";
         }
         copy("$srcpath","/tmp/xcatinitrd.$$/$_");
         chmod 0755,"/tmp/xcatinitrd.$$/".$_;
      }
   }

   #copy("$rootimg_dir/lib/modules/*d","/tmp/xcatinitrd.$$/$_");
   system("cd /tmp/xcatinitrd.$$/bin/; ln -sf bash sh");	#neccessary for SLES11
   system("cd /tmp/xcatinitrd.$$;find .|cpio -H newc -o|gzip -9 -c - > $destdir/initrd.gz");
   system("rm -rf /tmp/xcatinitrd.$$");

}

sub isyumdir {
   if ($File::Find::name =~ /\/repodata$/) {
      my $location = $File::Find::name;
      $location =~ s/\/repodata$//;
      push @yumdirs,$location;
   }
}

sub isnetdriver {
   foreach (@ndrivers) {
      if ($File::Find::name =~ /\/$_/) {
         my $filetoadd = $File::Find::name;
         $filetoadd =~ s!$rootimg_dir!!;
         push @filestoadd,[$filetoadd,"lib/$_"];
      }
   }
}
      	






sub postscripts { # TODO: customized postscripts
   generic_post();
   if (-d "$installroot/postscripts/hostkeys") {
      for my $key (<$installroot/postscripts/hostkeys/*key>) {
         copy ($key,"$rootimg_dir/etc/ssh/");
      }
      chmod 0600,<$rootimg_dir/etc/ssh/*key>;
   }
   if (-d "/$installroot/postscripts/.ssh") {
      mkpath("$rootimg_dir/root/.ssh");
      chmod(0700,"$rootimg_dir/root/.ssh/");
      for my $file (</$installroot/postscripts/.ssh/*>) {
         copy ($file,"$rootimg_dir/root/.ssh/");
      }
      chmod(0600,<$rootimg_dir/root/.ssh/*>);
   }

}

sub generic_post { #This function is meant to leave the image in a state approximating a normal install
   my $cfgfile;
   unlink("$rootimg_dir/dev/null");
   system("mknod $rootimg_dir/dev/null c 1 3");
   open($cfgfile,">","$rootimg_dir/etc/fstab");
   print $cfgfile "devpts  /dev/pts devpts   gid=5,mode=620 0 0\n";
   print $cfgfile "tmpfs   /dev/shm tmpfs    defaults       0 0\n";
   print $cfgfile "proc    /proc    proc     defaults       0 0\n";
   print $cfgfile "sysfs   /sys     sysfs    defaults       0 0\n";
   if ($tmplimit) {
      print $cfgfile "tmpfs   /tmp     tmpfs    defaults       0 0\n";
      print $cfgfile "tmpfs   /var/tmp     tmpfs    defaults       0 0\n";
   }
   close($cfgfile);
   open($cfgfile,">","$rootimg_dir/etc/sysconfig/network");
   print $cfgfile "NETWORKING=yes\n";
   close($cfgfile);
   open($cfgfile,">","$rootimg_dir/etc/resolv.conf");
   print $cfgfile "#Dummy resolv.conf to make boot cleaner";
   close($cfgfile);
   open($cfgfile,">","$rootimg_dir/etc/sysconfig/network-scripts/ifcfg-$prinic");
   print $cfgfile "ONBOOT=yes\nBOOTPROTO=dhcp\nDEVICE=$prinic\n";
   close($cfgfile);
   foreach (split /,/,$othernics) {
      if (/^$/) { next; }
      open($cfgfile,">","$rootimg_dir/etc/sysconfig/network-scripts/ifcfg-$_");
      print $cfgfile "ONBOOT=yes\nBOOTPROTO=dhcp\nDEVICE=$_\n";
      close($cfgfile);
   }
   open($cfgfile,">>","$rootimg_dir/etc/securetty");
   print $cfgfile "ttyS0\n";
   print $cfgfile "ttyS1\n";
   print $cfgfile "console\n";
   close($cfgfile);
   my @passwd;
   open($cfgfile,"<","$rootimg_dir/etc/passwd");
   @passwd = <$cfgfile>;
   close($cfgfile);
   open($cfgfile,">","$rootimg_dir/etc/passwd");
   foreach (@passwd) {
      if (/^root:/) {
         s/^root:\*/root:x/
      }
      print $cfgfile $_;
   }
   close($cfgfile);
   foreach (<$rootimg_dir/etc/skel/.*>) {
      if (basename($_) eq '.' or basename($_) eq '..') {
         next;
      }
      copy $_,"$rootimg_dir/root/";
   }
   open($cfgfile,">","$rootimg_dir/etc/init.d/gettyset");
   print $cfgfile "#!/bin/bash\n"; 
   print $cfgfile "for i in `cat /proc/cmdline`; do\n"; 
   print $cfgfile '  KEY=`echo $i|cut -d= -f 1`'."\n";
   print $cfgfile "  if [ \"\$KEY\" == \"console\" -a \"\$i\" != \"console=tty0\" ]; then\n";
   print $cfgfile "    VALUE=`echo \$i | cut -d= -f 2`\n"; 
   print $cfgfile "     COTTY=`echo \$VALUE|cut -d, -f 1`\n";
   print $cfgfile "     COSPEED=`echo \$VALUE|cut -d, -f 2|cut -dn -f 1`\n";
   print $cfgfile "     if echo \$VALUE | grep n8r; then\n";
   print $cfgfile "        FLOWFLAG=\"-h\"\n";
   print $cfgfile "     fi\n";
   print $cfgfile "     echo xco:2345:respawn:/sbin/agetty \$FLOWFLAG \$COTTY \$COSPEED xterm >> /etc/inittab\n";
   print $cfgfile "     init q\n";
   print $cfgfile "  fi\n";
   print $cfgfile "done\n";
   print $cfgfile "/etc/init.d/boot.localnet start\n";
   print $cfgfile "/opt/xcat/xcatdsklspost\n";
   close($cfgfile);
   chmod(0755,"$rootimg_dir/etc/init.d/gettyset");
   #link("$rootimg_dir/sbin/init","$rootimg_dir/init");
   my $rc = system("grep sshd $rootimg_dir/etc/init.d/.depend.start");
   if ($rc) {
      system("sed -i '".'s/^\(TARGETS = .*\)$/\1 sshd/'."' $rootimg_dir/etc/init.d/.depend.start");
      system("ln -s ../sshd $rootimg_dir/etc/init.d/rc3.d/S20sshd");
   }
   my $rc = system("grep gettyset $rootimg_dir/etc/init.d/.depend.start");
   if ($rc) {
      system("sed -i '".'s/^\(TARGETS = .*\)$/\1 gettyset/'."' $rootimg_dir/etc/init.d/.depend.start");
      system("ln -s ../gettyset $rootimg_dir/etc/init.d/rc3.d/S60gettyset");
   }
   if(($osver =~ /sles11/) || ($osver =~ /sles10/)) {#for sles11,sles10
	   rename(<$rootimg_dir/boot/vmlinux*>,"$destdir/kernel");
   }else {
   	   rename(<$rootimg_dir/boot/vmlinuz*>,"$destdir/kernel");
   }
}

#get th extra package name
sub get_extra_package_names {
    if (!$imagename) {
	$otherpkglist=get_extra_pkglist_file_name($customdir);
	if (!$otherpkglist) { $otherpkglist=get_extra_pkglist_file_name($pathtofiles); }
    }

   #print "customdir=$customdir,pathtofiles=$pathtofiles,otherpkglist=$otherpkglist\n";
   my %pkgnames=();  
   my @tmp_array=();


   if ($otherpkglist) {
     my $pkgfile;
     open($pkgfile,"<","$otherpkglist");
     while (<$pkgfile>) {
        chomp;
	s/\s+$//;   #remove trailing white spaces
	next if /^\s*$/; #-- skip empty lines
	push(@tmp_array,$_);
     }
     close($pkgfile);

     if ( @tmp_array > 0) {
        my $pkgtext=join(',',@tmp_array);
      
        #handle the #INLCUDE# tag recursively
        my $idir = dirname($otherpkglist);
        my $doneincludes=0;
	while (not $doneincludes) {
	    $doneincludes=1;
	    if ($pkgtext =~ /#INCLUDE:[^#]+#/) {
		$doneincludes=0;
		$pkgtext =~ s/#INCLUDE:([^#]+)#/include_file($1,$idir)/eg;
	    }
	}
     
        print "pkgtext=$pkgtext\n";
	my @tmp=split(',', $pkgtext);
	foreach (@tmp) {
	    my $idir;
	    if (/^--/) {	
		$idir="POST_REMOVE";   #line starts with -- means the package should be removed after otherpkgs are installed
		s/^--//;
            } elsif  (/^-/) {
		$idir="PRE_REMOVE"; #line starts with single - means the package should be removed before otherpkgs are installed
		s/^-//;
            } else { 
		$idir=dirname($_); 
	    }
	    my $fn=basename($_);
	    if (exists($pkgnames{$idir})) {
		my $pa=$pkgnames{$idir};
		push(@$pa, $fn);
	    } else {
		$pkgnames{$idir}=[$fn];
	    }
	}
     }
   }

   return %pkgnames;
}


sub include_file
{
   my $file = shift;
   my $idir = shift;
   my @text = ();
   unless ($file =~ /^\//) {
       $file = $idir."/".$file;
   }
   
   open(INCLUDE,$file) || \
       return "#INCLUDEBAD:cannot open $file#";
   
   while(<INCLUDE>) {
       chomp($_);
       s/\s+$//;  #remove trailing spaces
       next if /^\s*$/; #-- skip empty lines
       push(@text, $_);
   }
   
   close(INCLUDE);
   
   return join(',', @text);
}

sub get_extra_pkglist_file_name {
   my $base=shift;
   if (-r "$base/$profile.$osver.$arch.otherpkgs.pkglist") {
      return  "$base/$profile.$osver.$arch.otherpkgs.pkglist";
   } elsif (-r "$base/$profile.$arch.otherpkgs.pkglist") {
      return "$base/$profile.$arch.otherpkgs.pkglist";
   } elsif (-r "$base/$profile.$osver.otherpkgs.pkglist") {
      return "$base/$profile.$osver.otherpkgs.pkglist";
   } elsif (-r "$base/$profile.otherpkgs.pkglist") {
      return "$base/$profile.otherpkgs.pkglist";
   } 
   return "";
}

sub get_pkglist_file_name {
   my $base=shift;
   if (-r "$base/$profile.$osver.$arch.pkglist") {
      return "$base/$profile.$osver.$arch.pkglist";
   } elsif (-r "$base/$profile.$arch.pkglist") {
      return "$base/$profile.$arch.pkglist";
   } elsif (-r "$base/$profile.$osver.pkglist") {
      return "$base/$profile.$osver.pkglist";
   } elsif (-r "$base/$profile.pkglist") {
      return "$base/$profile.pkglist";
   } 

   return "";
}


sub get_postinstall_file_name {
   my $base=shift;
   if (-x "$base/$profile.$osver.$arch.postinstall") {
      return "$base/$profile.$osver.$arch.postinstall";
   } elsif (-x "$base/$profile.$arch.postinstall") {
      return "$base/$profile.$arch.postinstall";
   } elsif (-x "$base/$profile.$osver.postinstall") {
      return "$base/$profile.$osver.postinstall";
   } elsif (-x "$base/$profile.postinstall") {
      return "$base/$profile.postinstall";
   } 

   return "";
}