#!/usr/bin/env perl
# generate the image for mic 
# Since the root file system for mic is generated on the host by
# micctrl command, this script only help to generate the /etc/hosts,
# /root/.ssh from the management node to the root file system.

BEGIN
{
    $::XCATROOT = $ENV{'XCATROOT'} ? $ENV{'XCATROOT'} : '/opt/xcat';
}
use lib "$::XCATROOT/lib/perl";

use strict;
use File::Path;
use File::Basename;
use File::Copy;
use Getopt::Long;
Getopt::Long::Configure("bundling");
Getopt::Long::Configure("pass_through");

my $pkglist;
my $srcdir;
GetOptions(
   'pkglist=s' => \$pkglist,
   'srcdir=s' => \$srcdir,
);

my $fsdir = "$srcdir/opt/intel/mic/filesystem";
my $systemdir = "$fsdir/overlay/system";
mkpath ($systemdir);

# this is the file list which includes the files which should be copied 
# from MN to the root file system
my @sysfilelist = (
  "/etc/hosts", 
  "/etc/group", 
  "/etc/passwd", 
  "/etc/shadow",
  "/etc/resolv.conf", 
  "/etc/nsswitch.conf",
  "/etc/ssh/ssh_host_rsa_key",
  "/etc/ssh/ssh_config",
  "/etc/ssh/ssh_host_key",
  "/etc/ssh/sshd_config",
  "/etc/ssh/ssh_host_dsa_key",
  "/etc/ssh/ssh_host_key.pub",
  "/root/.ssh/id_rsa",
  "/root/.ssh/id_rsa.pub",
  "/root/.ssh/authorized_keys",);

# do the copy
foreach my $file (@sysfilelist) {
    my $dirname = dirname("$systemdir/$file");
    unless (-d $dirname) {
        mkpath ($dirname);
    }
    copy ($file, "$systemdir/$file");
}

#Change the /bin/bash to /bin/sh in the /etc/passwd since base file system of mic only has sh.
my $cmd = "sed \"s/\\/bin\\/bash/\\/bin\\/sh/\" $systemdir/etc/passwd > /tmp/passwd.mic; mv /tmp/passwd.mic $systemdir/etc/passwd;";
system ($cmd);

# Create emtpy common dir and common.filelist for later using
mkpath ("$fsdir/common");
system ("touch $fsdir/common.filelist");


print "Genimage for mic has been done.\n";

1;