spewleds.in 2.13 KB
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#!/usr/bin/perl -wT

#
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# Copyright (c) 2004, 2005 University of Utah and the Flux Group.
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# 
# {{{EMULAB-LICENSE
# 
# This file is part of the Emulab network testbed software.
# 
# This file is free software: you can redistribute it and/or modify it
# under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or (at
# your option) any later version.
# 
# This file is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public
# License for more details.
# 
# You should have received a copy of the GNU Affero General Public License
# along with this file.  If not, see <http://www.gnu.org/licenses/>.
# 
# }}}
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#

#
# Simple script to connect to the LED status port on a stargate and spew the LED status
# to stdout
#

use English;
use Getopt::Std;
use IO::Socket;

use lib '@prefix@/lib';
use libdb;

my $LED_STATUS_PORT = 1812;

# Make output unbuffered
$| = 1;

#
# Args
#
if (@ARGV != 1) {
    die "Usage: spewleds mote\n";
}

my ($mote) = @ARGV;

#
# Untaint the argument. 
#
if ($mote =~ /^([-\w.]+)$/) {
	$mote = $1;
} else {
    die("Tainted node name: $mote");
}

#
# Make sure they have permissions to see this node
#
if (! TBNodeAccessCheck($UID, TB_NODEACCESS_READINFO, $mote)) {
    print STDERR
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    "*** spewleds: Not enough permission to view that node!\n";
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    exit 1;
}

#
# Make sure it's a stargate or garcia (XXX garcia should be temporary)
#
my ($type, $class) = TBNodeType($mote);
if ($type ne "garcia" && $class ne "sg") {
    die "Node $mote is not of the correct type ($type,$class)\n";
}

#
# Connect to the LED status port
#
my $sock = new IO::Socket::INET (
                                  PeerAddr => "$mote",
                                  PeerPort => "$LED_STATUS_PORT",
                                  Proto => 'tcp',
                                 );
die "Could not create socket: $!\n" unless $sock;

#
# Okie, just loop on this guy forever
#
while (my $string = <$sock>) {
    print "$string"
}

close $sock;
exit 0;