#!/usr/bin/perl
# IBM(c) 2007 EPL license http://www.eclipse.org/legal/epl-v10.html
#(C)IBM Corp

#-----------------------------------------------------------------------------

=head1   confignimsh

	This sample customization script can be used to automatically configure
	the NIM nimsh (NIM service handler).  It will also configure NIMSH to 
	use OpenSSL in the NIM environment.

	It assumes that the openssl software has already been installed on the 
	node.

	This script also assumes that you have run "nimconfig -c" on the NIM 
	master for the nodes.  

	This script should only be run on AIX standalone (diskfull) cluster compute 
	nodes. It should NOT be run on the xCAT management node, service nodes or
	diskless nodes.

	Note:  This script will also remove the .rhosts file (actually back it up).
	If you don't want it removed then comment out those lines.

=cut

#-----------------------------------------------------------------------------

use Socket;

# this script gets run from an xCAT post script that sets the MASTER and NODE
# environment variables.

# NIM needs the short hostnames
#get short hostname for master
my $master = $ENV{'MASTER'};
my $mhost;
my $shortmaster;
if ($master =~ /\d+\.\d+\.\d+\.\d+/)
{
	my $packedaddr = inet_aton($master);
	$mhost = gethostbyaddr($packedaddr, AF_INET);
} else {
	$mhost = $master;
}
($shortmaster = $mhost) =~ s/\..*$//;
chomp $shortmaster;

# get short hostname for node
my $name = $ENV{'NODE'};
my $nhost;
my $shortname;
if ($name =~ /\d+\.\d+\.\d+\.\d+/)
{
    my $packedaddr = inet_aton($name);
    $nhost = gethostbyaddr($packedaddr, AF_INET);
} else {
    $nhost = $name;
}
($shortname = $nhost) =~ s/\..*$//;
chomp $shortname;

# save off the existing niminfo file
if (-f "/etc/niminfo") {
	runcmd("mv /etc/niminfo /etc/niminfo.bak");
}

# create new niminfo file and start nimsh daemon etc.
runcmd("niminit -a name=$shortname -a master=$shortmaster -a connect='nimsh'");

# configure nimsh to use ssl 
runcmd("nimclient -c");

# get rid of the .rhost - ????
if (-f "/.rhosts") {
	runcmd("mv /.rhost /.rhost.orig");
}

exit 0;

sub runcmd {
	my $cmd = shift @_;
	$cmd .= ' 2>&1';
	my @output = `$cmd`;
	my $rc = $? >> 8;
	if ($rc) {
		system("logger -t xcat -p local4.err 'confignimsh: command $cmd failed with rc $rc: " . join('',@output) . "'");
		exit $rc;
	}
}