#!/usr/local/bin/perl -w
#-*-perl-*-
#

use strict;
use vars qw ( @WhoList );
use Win32;
use Win32::NetAdmin;
use Date::Calc qw( Delta_DHMS );

my ($VERSION) = '$Revision: 1.0 $' =~ /([.\d]+)/;

my $warnings = 0;

# Print a usuage message on a unknown option.

$SIG {__WARN__} = sub {
    if (substr ($_ [0], 0, 14) eq "Unknown option") {die "Usage"};
    require File::Basename;
    $0 = File::Basename::basename ($0);
    $warnings = 1;
    warn "$0: @_";
};

$SIG {__DIE__} = sub {
    require File::Basename;
    $0 = File::Basename::basename ($0);
    if (substr ($_ [0], 0,  5) eq "Usage") {
        die <<EOF;
$0 (NT Perl bin utils) $VERSION
$0 [ -h ]
EOF
    }
    die "$0: @_";
};

die "Usage" if $ARGV[0];

my $Server = "";

my @Month = (
        "Jan",
        "Feb",
        "Mar",
        "Apr",
        "May",
        "Jun",
        "Jul",
        "Aug",
        "Sep",
        "Oct",
        "Nov",
        "Dec"
        );

Win32::NetAdmin::LoggedOnUsers (
                $Server, 
                \@WhoList
                   ) 
  or die "$^E\n";

my $Reboot = time - ( Win32::GetTickCount() / 1000 );
my @Neht = localtime ( $Reboot );
my @Won = localtime ( time );

$#Neht = 5;
my @Then = reverse @Neht;
$#Won = 5;
my @Now = reverse @Won;

my @Diff = Delta_DHMS ( 
               @Then,
               @Now 
              );

my $UserPlural = "user";
$UserPlural = $UserPlural . "s" if $#WhoList > 0;

printf " %2d:%2d    up %d days, %2d:%2d, %2d %s\n", $Now[3], $Now[4], 
+$Diff[0], $Diff[1], $Diff[2], $#WhoList + 1, $UserPlural;

=pod

=head1 NAME

B<uptime> - show how long the system has been up

=head1 SYNOPSIS

B<uptime> [ -h ]

=head1 DESCRIPTION

The B<uptime> command prints the current time, the length of time the 
+system has been up, and the number of users logged on.

=head2 OPTIONS

The following options are supported:

=over 4

=item -h

Display syntax.

=back

=head1 EXAMPLE

Below is an example of the output B<uptime> provides:

C:\> uptime
 10:10    up 0 days, 18:40,  2 users

=head1 ENVIRONMENT

The working of B<uptime> is not influenced by any environment variable
+s.

=head1 BUGS

B<uptime> returns an approximate uptime.  It uses the Win32::GetTickCo
+unt() function, an imprecise mechanism.  A better way to derrive the 
+last boot is to query the event log for the most recent 6005 or 6009 
+event and grab that time.  If log files are large, this can be time c
+onsuming.

If you need this kind of resolution, use B<who -b>.

B<printf> does not seem to want to pad numbers with '0's.

=head1 STANDARDS

It does not make sense to talk about standards in a B<uptime> manual p
+age.

=head1 REVISION HISTORY

    uptime
    Revision 1.0  2000/06/22 10:05:57  idnopheq
    Initial revision

=head1 AUTHOR

The Perl implementation of B<uptime> was written by Dexter Coffin, I<i
+dnopheq@home.com>.

=head1 COPYRIGHT and LICENSE

This program is copyright by Dexter Coffin 2000.

This program is free and open software. You may use, copy, modify, dis
+tribute,
and sell this program (and any modified variants) in any way you wish,
provided you do not restrict others from doing the same.

=head1 SEE ALSO

=for html
<a href="who.html">who</a><p>

=head1 NEXT TOPIC

=cut

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