#  WMI_PS.pl
#  Example 9.14:
#  ----------------------------------------
#  From "Win32 Perl Scripting: Administrators Handbook" by Dave Roth
#  Published by New Riders Publishing.
#  ISBN # 1-57870-215-1
#
#  This script uses WMI to generate a process list from remote machines.
#
print "From the book 'Win32 Perl Scripting: The Administrator's Handbook' by Dave Roth\n\n";


use Win32::OLE qw( in );

$Machine = "." unless( $Machine = shift @ARGV );
$Machine =~ s#^[\\/]+## if( $ARGV[0] =~ m#^[\\/]{2}# );

# This is the WMI moniker that will connect to a machine's 
# CIM (Common Information Model) repository
$CLASS = "WinMgmts:{impersonationLevel=impersonate}!//$Machine";

# Get the WMI (Microsoft's implementation of WBEM) interface
$WMI = Win32::OLE->GetObject( $CLASS ) 
  || die "Unable to connect to \\$Machine:" . Win32::OLE->LastError();

# Get the collection of Win32_Process objects
$ProcList = $WMI->InstancesOf( "Win32_Process" );

$~ = PROCESS_HEADER;
write;
$~ = PROCESS_INFO;

# Cycle through each Win32_Process object 
# and write out its details...
foreach $Proc ( sort( SortProcs ( in( $ProcList ) ) ) )
{
    write;
}

sub SortProcs 
{
  lc $a->{Name} cmp lc $b->{Name};
}

sub FormatNumber
{
    my( $Number ) = @_;
    my( $Suffix ) = "";
    my $K = 1024;
    my $M = 1024 * $K;

    if( $M <= $Number )
    {
        $Suffix = "M";
        $Number /= $M;
    }
    elsif( $K <= $Number )
    {
        $Suffix = "K";
        $Number /= $K;
    }

    $Number =~ s/(\.\d{0,2})\d*$/$1/;

    {} while ($Number =~ s/^(-?\d+)(\d{3})/$1,$2/);

    return( $Number . $Suffix );
}

sub FormatDate
{
    my( $Date ) = @_;
    $Date =~ s/(\d{4})(\d{2})(\d{2})(\d{2})(\d{2})(\d{2}).*/$1.$2.$3 $4:$5:$6/;
    return( $Date );
}

format PROCESS_HEADER =
@||| @||||| @|||||||||||||||| @|||| @|||||| @||||||| @||||||||||||||||||
PID, Parent, "Process Name", "Thrds", "Memory", "Mem Peak", "Created"
---- ------ ----------------- ----- ------- -------- -------------------
.

format PROCESS_INFO =
@||| @||||| @<<<<<<<<<<<<<<<< @>>>> @>>>>>> @>>>>>>> @>>>>>>>>>>>>>>>>>>
$Proc->{'ProcessID'}, $Proc->{'ParentProcessID'}, $Proc->{Name}, $Proc->{'ThreadCount'}, FormatNumber( $Proc->{'WorkingSetSize'} ), FormatNumber( $Proc->{'PeakWorkingSetSize'} ), FormatDate( $Proc->{'CreationDate'} )
.