ctop

#!/usr/bin/perl -w

# The MIT License
#
# Copyright (c) 2014 Adrian Tan <atks@umich.edu>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.

use strict;
use warnings;

my $node;
if (@ARGV==1)
{
    $node = $ARGV[0];
}
else
{
    print STDERR "Please define a node as an argument\n";
    exit(1);
}
#print "NODE: $node\n";

my $executablePath = __FILE__;
$executablePath =~ s/[^\/]+$//;
my $defaultUser = "atks";
my $configFile = $executablePath . ".config";
if (-e $configFile)
{
    open(IN, $configFile) || die "Cannot open config file";
    $defaultUser = <IN>;
    chomp($defaultUser);
    close(IN);   
}
else
{
    print STDERR "Please create a .config file containing your user name in the directory of cluster tools.\n";
    exit(1);
}

my $result = `mosctl whois $node 2>&1`;

#print "CHECK: $result\n";

if ($result=~/No particular MOSIX node number is associated with/)
{
    $result = `srun --nodelist=$node top -b -n1 | grep -P 'PID|$defaultUser'`;
}
else
{
    $result = `mosbatch -E/tmp -r$node /bin/bash -c \"top -b -n1 | grep -P 'PID|$defaultUser'\"`;
}


print "$result\n";