manage_reservations.in 24 KB
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#!/usr/bin/perl -w
#
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# Copyright (c) 2000-2017 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/>.
# 
# }}}
#
use English;
use strict;
use Getopt::Std;
use XML::Simple;
use Data::Dumper;
use CGI;
use POSIX ":sys_wait_h";
use Date::Parse;

#
# Back-end script to manage APT profiles.
#
sub usage()
{
    print("Usage: manage_reservations [-a <urn>] list [-u uid | -p pid]\n");
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    print("Usage: manage_reservations [-a <urn>] delete pid uuid\n");
    print("Usage: manage_reservations [-a <urn>] approve -p portal uuid\n");
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    print("Usage: manage_reservations [-a <urn>] systeminfo\n");
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    print("Usage: manage_reservations [-a <urn>] prediction\n");
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    exit(-1);
}
my $optlist     = "dt:a:";
my $debug       = 0;
my $webtask_id;
my $webtask;
my $authority;
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my $aggregate;
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#
# Configure variables
#
my $TB		= "@prefix@";
my $TBOPS       = "@TBOPSEMAIL@";
my $OURDOMAIN	= "@OURDOMAIN@";
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my $ANNOUNCE    = "$TB/sbin/announce";
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my $MYURN	= "urn:publicid:IDN+${OURDOMAIN}+authority+cm";

#
# Untaint the path
#
$ENV{'PATH'} = "$TB/bin:$TB/sbin:/bin:/usr/bin:/usr/bin:/usr/sbin";
delete @ENV{'IFS', 'CDPATH', 'ENV', 'BASH_ENV'};

#
# Turn off line buffering on output
#
$| = 1;

#
# Load the Testbed support stuff.
#
use lib "@prefix@/lib";
use EmulabConstants;
use emdb;
use emutil;
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use Brand;
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use User;
use Project;
use Reservation;
use EmulabConstants;
use libEmulab;
use libtestbed;
use WebTask;
use APT_Geni;
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use APT_Aggregate;
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use GeniResponse;
use GeniUser;

# Protos
sub fatal($);
sub DoReserve();
sub DoList();
sub DoDelete();
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sub DoApprove();
sub DoSystemInfo();
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sub DoPrediction();
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sub readfile($);
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sub AddAnnouncement($$$$$$$);
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sub DeleteAnnouncement($);
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#
# Parse command arguments. Once we return from getopts, all that should be
# left are the required arguments.
#
my %options = ();
if (! getopts($optlist, \%options)) {
    usage();
}
if (defined($options{"t"})) {
    $webtask_id = $options{"t"};
    $webtask = WebTask->Lookup($webtask_id);
    if (!defined($webtask)) {
	fatal("Could not lookup webtask $webtask_id");
    }
    # Convenient.
    $webtask->AutoStore(1);
}
if (defined($options{"d"})) {
    $debug++;
}
if (@ARGV < 1) {
    usage();
}
my $action = shift(@ARGV);

#
# Default to local cluster
#
if (defined($options{"a"})) {
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    if (GeniHRN::IsValid($options{"a"})) {
	$aggregate = APT_Aggregate->Lookup($options{"a"});
    }
    else {
	$aggregate = APT_Aggregate->LookupByNickname($options{"a"});
    }
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}
else {
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    $aggregate = APT_Aggregate->Lookup($MYURN);
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}
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if (!defined($aggregate)) {
    fatal("Could not lookup aggregate");
}
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$authority = APT_Geni::GetAuthority($aggregate->urn());
if (!defined($authority)) {
    fatal("Could not look up authority");
}
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# For credentials.
my $this_user = User->ThisUser();
if (! defined($this_user)) {
    fatal("You ($UID) do not exist!");
}
my $geniuser = GeniUser->CreateFromLocal($this_user);

if ($action eq "reserve") {
    DoReserve();
}
elsif ($action eq "list") {
    DoList();
}
elsif ($action eq "delete") {
    DoDelete();
}
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elsif ($action eq "approve") {
    DoApprove();
}
elsif ($action eq "systeminfo") {
    DoSystemInfo();
}
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elsif ($action eq "prediction") {
    DoPrediction();
}
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else {
    usage();
}
exit(0);

#
# Create a reservation.
#
sub DoReserve()
{
    #
    # We allow for a user or project argument.
    #
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    my $optlist = "t:s:e:nN:u:p:";
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    my ($start, $end, $type, $reason, $update);
    my $checkonly = 0;
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    my $portal;
    my $brand;
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    my %rpcargs = ();
    my $context;
    my ($credential,$speaksfor);
    
    my %options = ();
    if (! getopts($optlist, \%options)) {
	usage();
    }
    usage()
	if (@ARGV < 2);
    my $project = Project->Lookup($ARGV[0]);
    my $count   = $ARGV[1];

    if (defined($options{"s"})) {
	$start = $options{"s"};
    }
    if (defined($options{"e"})) {
	$end = $options{"e"};
    }
    if (defined($options{"t"})) {
	$type = $options{"t"};
    }
    if (defined($options{"u"})) {
	$update = $options{"u"};
    }
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    if (defined($options{"p"})) {
	$portal = $options{"p"};
    }
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    if (defined($options{"N"})) {
	$reason = readfile($options{"N"});
    }
    if (defined($options{"n"})) {
	$checkonly = 1;
    }
    usage()
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	if (!defined($project));
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    # Need brand for email. No portal argument means emulab brand.
    $brand = Brand->Create($portal);
    if (!defined($brand)) {
	fatal("Bad branding");
    }
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    if (defined($update)) {
	usage()
	    if (! (defined($count) || defined($start) || defined($end)));
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    }
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    else {
	usage()
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	    if (! (defined($count) && defined($type) && defined($end)));
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	if ($type !~ /^[-\w]+$/) {
	    fatal("Type is not a string");
	}
    }
    if (defined($count) && $count !~ /^\d+$/) {
	fatal("Count is not an integer");
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    }
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    if (defined($start) &&
	!($start =~ /^\d+$/ || str2time($start))) {
	fatal("Start is not a unix timestamp or datetime");
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    }
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    if (defined($end) &&
	!($end =~ /^\d+$/ || str2time($end))) {
	fatal("End is not a unix timestamp or datetime");
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    }
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    $rpcargs{"start"} = TBDateStringGMT($start) if (defined($start));
    $rpcargs{"end"}   = TBDateStringGMT($end) if (defined($end));
    $rpcargs{"count"} = $count if (defined($count));
    $rpcargs{"type"}  = $type if (!defined($update));
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    $rpcargs{"check"} = $checkonly;
    $rpcargs{"reason"}= $reason if (defined($reason));
    $rpcargs{"update"}= $update if (defined($update));
    
    if ($this_user->IsAdmin()) {
	#
	# We do not have a very good notion of cross site admin.
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	# So first we make sure that the user exists at the cluster
	# and then we make an "admin" call as the root authority.
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	#
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	if (APT_Geni::CreatePortalUser($authority, $geniuser)) {
	    fatal("Could not create admin user at remote cluster");
	}
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	$rpcargs{"project_urn"} = $project->urn()->asString();
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	$rpcargs{"user_urn"} = $geniuser->urn()->asString();
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    }
    else {
	if (!$project->AccessCheck($this_user, TB_PROJECT_CREATEEXPT())) {
	    fatal("No permission to access reservation list for $project")
	}
	($credential,$speaksfor) =
	    APT_Geni::GenProjectCredential($project, $geniuser);
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	fatal("Could not generate credentials")
	    if (!defined($credential));
	my $credentials = [$credential->asString()];
	if (defined($speaksfor)) {
	    $credentials = [@$credentials, $speaksfor->asString()];
	}
	$rpcargs{"credentials"} = $credentials;
	$context = APT_Geni::GeniContext();
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    }
    my $response =
	APT_Geni::PortalRPC($authority, $context, "Reserve", \%rpcargs);
    if (GeniResponse::IsError($response)) {
	#
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	# Watch for a refused error, we want to tell the user that.
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	#
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	if ($response->code() == GENIRESPONSE_REFUSED) {
	    UserError($response->output());
	}
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	fatal($response->output());
    }
    print Dumper($response);
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    #
    # Exit with different status if the reservation is feasible but
    # needs to be approved. The value is a boolean indicating
    # approved.  Note that this applies even in "check" mode; the
    # approval code indicates if the request is feasible and will be
    # immediately approved.
    #
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    my $approved;
    my $uuid;
    my $idx;

    if (ref($response->value()) eq "HASH") {
	my $blob  = $response->value();
	$approved = $blob->{'approved'};
	$uuid     = $blob->{'uuid'} if (exists($blob->{'uuid'}));
	$idx      = $blob->{'idx'} if (exists($blob->{'idx'}));
	if (defined($idx) && $idx !~ /^\d*$/) {
	    fatal("Bad format for index from cluster");
	}
	if (defined($uuid) && !ValidUUID($uuid)) {
	    fatal("Bad format for uuid from cluster");
	}
    }
    else {
	# Backwards compat.
	$approved = $response->value();
    }
    if ($checkonly) {
	exit($approved ? 0 : 2);
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    }
    #
    # Needs to be approved, exit with special status.
    #
    # If this was not $checkonly, then we want to send email locally
    # since the email was generated to the tbops but not the portal
    # email lists.
    #
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    if (!$approved) {
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	my $this_uid   = $this_user->uid();
	my $this_email = $this_user->email();
	my $url        = $brand->wwwBase() . "/list-reservations.php";
    
	$brand->SendEmail($brand->ExtensionsEmailAddress(),
	  "Pending reservation request needs approval",
	  "A reservation request was made by $this_uid, but it needs approval.".
	  "\n\n".
	  "See: $url", $this_email);
    }
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    elsif (defined($uuid)) {
	#
	# Schedule an announcement for the user.
	#
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	AddAnnouncement($portal, $brand, $uuid, $this_user, $count, $type, $start);
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    }
    if (defined($webtask)) {
	$webtask->approved($approved);
	$webtask->idx($idx) if (defined($idx));
	$webtask->uuid($uuid) if (defined($uuid));
    }
    exit($approved ? 0 : 2);
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}

#
# Ask for a list of reservations.
#
sub DoList()
{
    #
    # We allow for a user or project argument.
    #
    my $optlist = "u:p:Ai:";
    my $anon    = 0;
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    my $uuid;
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    my $project;
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    my $user;
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    my %rpcargs = ();
    my $context;
    
    my %options = ();
    if (! getopts($optlist, \%options)) {
	usage();
    }
    if (defined($options{"A"})) {
	$anon = 1;
    }
    if (defined($options{"i"})) {
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	$uuid = $options{"i"};
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    }
    if (defined($options{"u"})) {
	$user = User->Lookup($options{"u"});
	if (!defined($user)) {
	    fatal("No such user");
	}
	if (!$this_user->IsAdmin() && !$this_user->SameUser($user)) {
	    fatal("No permission to access reservation list for $user")
	}
	$geniuser = $this_user->CreateFromLocal($user);
    }
    if (defined($options{"p"})) {
	$project = Project->Lookup($options{"p"});

	if (!defined($project)) {
	    fatal("No such project");
	}
	if (!$this_user->IsAdmin() &&
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	    !$project->AccessCheck($this_user, TB_PROJECT_CREATEEXPT())) {
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	    fatal("No permission to access reservation list for $project")
	}
    }
    if ($this_user->IsAdmin() || $anon) {
	#
	# We do not have a very good notion of cross site admin. Get
	# the entire list, we will filter here.
	#
    }
    else {
	my ($credential,$speaksfor);
	
	if (defined($project)) {
	    ($credential,$speaksfor) =
		APT_Geni::GenProjectCredential($project, $geniuser);
	}
	else {
	    ($credential,$speaksfor) =
		APT_Geni::GenUserCredential($geniuser);
	}
	fatal("Could not generate credentials")
	    if (!defined($credential));
	
	my $credentials = [$credential->asString()];
	if (defined($speaksfor)) {
	    $credentials = [@$credentials, $speaksfor->asString()];
	}
	$rpcargs{"credentials"} = $credentials;
	$context = APT_Geni::GeniContext();
    }
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    if (defined($uuid)) {
	$rpcargs{"uuid"} = $uuid;
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    }
    my $response =
	APT_Geni::PortalRPC($authority, $context, "Reservations", (\%rpcargs));
    if (GeniResponse::IsError($response)) {
	#
	# All errors are fatal.
	#
	fatal($response->output());
    }
    my $list = $response->value()->{'reservations'};
    #
    # Map remote URNs to local projects and users. Not all of them can
    # be mapped of course, we leave those as is. 
    #
    foreach my $details (values(%$list)) {
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	my $userhrn  = GeniHRN->new($details->{'user'});
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	my $geniuser = GeniUser->Lookup($details->{'user'}, 1);
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	if (defined($geniuser) && $geniuser->IsLocal()) {
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	    #print Dumper($geniuser);
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	    $details->{'uid'}     = $geniuser->uid();
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	    $details->{'uid_idx'} = $geniuser->idx();
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	}
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	else {
	    $details->{'uid'}     = $userhrn->id();
	}
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	my $projhrn = GeniHRN->new($details->{'project'});
	if ($projhrn->domain() eq $OURDOMAIN && defined($projhrn->project())) {
	    my $project = Project->Lookup($projhrn->project());
	    if (defined(($project))) {
		$details->{'pid'}     = $project->pid();
		$details->{'pid_idx'} = $project->pid_idx();
	    }
	}
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	else {
	    $details->{'pid'} = $projhrn->id();
	}
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    }
    #
    # Strip out unwanted results if we asked as an admin for a specific
    # user or project.
    #
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    if ($this_user->IsAdmin() && (defined($project) || defined($user))) {
	my $tmp = {};
	
	foreach my $key (keys(%$list)) {
	    my $details = $list->{$key};
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	    if (defined($project)) {
		next
		    if (!defined($details->{'pid_idx'}) ||
			$details->{'pid_idx'} != $project->pid_idx());
	    }
	    else {
		next
		    if (!defined($details->{'uid_idx'}) ||
			$details->{'uid_idx'} != $user->uid_idx());
	    }
	    $tmp->{$key} = $details;
	}
	$list = $tmp;
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    }
    if (defined($webtask)) {
	$webtask->value($list);
	$webtask->Exited(0);
    }
    else {
	print Dumper($list);
    }
    exit(0);
}

#
# Delete a reservation.
#
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# This is not doing proper permission checks or credentials. Need to fix.
#
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sub DoDelete()
{
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    #
    # We allow for admins to pass a reason (deny with cause).
    #
    my $optlist = "N:";
    my $reason;
    
    my %options = ();
    if (! getopts($optlist, \%options)) {
	usage();
    }
    if (defined($options{"N"})) {
	$reason = readfile($options{"N"});
	chomp($reason);
    }
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    usage()
	if (@ARGV != 2);
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    my $pid  = shift(@ARGV);
    my $uuid = shift(@ARGV);
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    # Check this since Reservation->Lookup() does not validate.
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    fatal("Invalid uuid")
	if (!ValidUUID($uuid));
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    my $project = Project->Lookup($pid);
    fatal("No such project")
	if (!defined($project));
    
    if (!$this_user->IsAdmin() &&
	!$project->AccessCheck($this_user, TB_PROJECT_CREATEEXPT())) {
	fatal("No permission to access reservation list for $project")
    }
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    my $blob = { "uuid" => $uuid,
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		 "project" => $project->urn()->asString()
    };
    if ($this_user->IsAdmin() && defined($reason) && $reason ne "") {
	$blob->{'reason'} = $reason;
    }
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    my $response =
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	APT_Geni::PortalRPC($authority, undef, "DeleteReservation", $blob);
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    if (GeniResponse::IsError($response)) {
	#
	# All errors are fatal.
	#
	fatal($response->output());
    }
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    DeleteAnnouncement($uuid);
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    if (defined($webtask)) {
	$webtask->Exited(0);
    }
    else {
	print Dumper($response);
    }
    exit(0);
}

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#
# Approve a reservation.
#
sub DoApprove()
{
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    my $optlist = "p:";
    my $portal;

    my %options = ();
    if (! getopts($optlist, \%options)) {
	usage();
    }
    if (defined($options{"p"})) {
	$portal = $options{"p"}
    }
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    usage()
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	if (@ARGV != 1 || !defined($portal));
    my $uuid = shift(@ARGV);
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    # Check this since Reservation->Lookup() does not validate.
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    fatal("Invalid uuid")
	if (!ValidUUID($uuid));

    my $brand = Brand->Create($portal);
    if (!defined($brand)) {
	fatal("Bad branding");
    }
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    if (!$this_user->IsAdmin()) {
	fatal("No permission to approve reservations")
    }
    # PortalRPC will use the root context in this case, which is
    # essentially saying the caller is an admin.
    my $response =
	APT_Geni::PortalRPC($authority, undef, "ApproveReservation",
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			    {"uuid" => $uuid});
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    if (GeniResponse::IsError($response)) {
	#
	# All errors are fatal.
	#
	fatal($response->output());
    }
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    #
    # Schedule an announcement for the user.
    #
    my $blob = $response->value();
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    if (exists($blob->{'user'})) {
	my $geniuser = GeniUser->Lookup($blob->{'user'}, 1);
	if (defined($geniuser) && $geniuser->IsLocal()) {
	    AddAnnouncement($portal, $brand, $uuid, $geniuser->emulab_user(),
			    $blob->{'nodes'}, $blob->{'type'}, $blob->{'start'});
	}
    }
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    if (defined($webtask)) {
	$webtask->Exited(0);
    }
    else {
	print Dumper($response);
    }
    exit(0);
}

#
# Get the reservation system info.
#
sub DoSystemInfo()
{
    my $optlist = "p:";
    my $portal;
    my $errmsg;
    my @aggregates = ($authority);
    my @webtasks   = ();

    my %options = ();
    if (! getopts($optlist, \%options)) {
	usage();
    }
    if (defined($options{"p"})) {
	$portal = $options{"p"}
    }
    usage()
	if (@ARGV);

    #
    # Portal argument says to ignore aggregate argument, and contact
    # all aggregates listed for the portal. 
    #
    if (defined($portal)) {
	@aggregates = ();
	
	my @list = APT_Aggregate->LookupForPortal($portal);
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	foreach my $agg (@list) {
	    my $authority = APT_Geni::GetAuthority($agg->urn());
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	    if (!defined($authority)) {
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		$errmsg = "Cannot lookup authority for $agg";
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		goto bad;
	    }
	    push(@aggregates, $authority);
	}
    }

    my $coderef = sub {
	my ($blob) = @_;
	my $authority = $blob->{"authority"};
	my $webtask   = $blob->{"webtask"};
	
	# PortalRPC will use the root context in this case, which is
	# essentially saying the caller is an admin. But thats okay
	# for this call, it is just informational.
	my $response =
	    APT_Geni::PortalRPC($authority, undef, "ReservationSystemInfo");
	
	if (GeniResponse::IsError($response)) {
	    #
	    # All errors are fatal.
	    #
	    if (defined($webtask)) {
		$webtask->output($response->output());
		$webtask->Exited(-1);
	    }
	    else {
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		print STDERR "$authority: " . $response->output() . "\n";
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	    }
	    return -1;
	}
	if (defined($webtask)) {
	    $webtask->value($response->value());
	    $webtask->Exited(0);
	}
	return 0;
    };
    #
    # Multiple aggregates, we use parrun. We need a webtask for each
    # authority to communicate the results back to the parent, who
    # then combines them all.
    #
    my @return_codes = ();
    my @agglist = ();

    foreach my $auth (@aggregates) {
	my $temptask = WebTask->CreateAnonymous();
	# For delete below.
	push(@webtasks, $temptask);
	push(@agglist, {"authority" => $auth,
			"webtask"   => $temptask});
    }
    if (ParRun({"maxwaittime" => 60,
		"maxchildren" => scalar(@agglist)},
	    \@return_codes, $coderef, @agglist)) {
	#
	# The parent caught a signal. Leave things intact so that we can
	# kill things cleanly later.
	#
	$errmsg = "Internal error get reservation info";
	goto bad;
    }
    #
    # Check the exit codes, create return structure for the web interface.
    #
    my $blob = {};
    
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    foreach my $agg (@agglist) {
	my $code  = shift(@return_codes);
	my $auth  = $agg->{'authority'};
	my $wtask = $agg->{'webtask'};

	$wtask->Refresh();

	if ($code) {
	    $errmsg  = "$auth: " . $wtask->output();
	    goto bad;
	}
	$blob->{$auth->urn()} = $wtask->value();
    }
    if (defined($webtask)) {
	$webtask->value($blob);
	$webtask->Exited(0);
    }
    else {
	print Dumper($blob);
    }
    foreach my $temptask (@webtasks) {
	$temptask->Delete();
    }
    exit(0);

  bad:
    foreach my $temptask (@webtasks) {
	$temptask->Delete();
    }
    fatal($errmsg);
}

#
# Get the prediction data.
#
sub DoPrediction()
{
    my $optlist = "p:";
    my $portal;
    my $errmsg;
    my @aggregates = ($authority);
    my @webtasks   = ();
    my @projlist   = ();

    my %options = ();
    if (! getopts($optlist, \%options)) {
	usage();
    }
    if (defined($options{"p"})) {
	$portal = $options{"p"}
    }
    # Argument is a list of projects, else we generate one for user.
    if (@ARGV) {
	foreach my $pid (@ARGV) {
	    my $project = Project->Lookup($pid);
	    if (!defined($project)) {
		fatal("No such project: $pid");
	    }
	    push(@projlist, $project->urn());
	}
    }
    else {
	my @plist;
	if ($this_user->ProjectMembershipList(\@plist)) {
	    fatal("Could not get project membership list");
	}
	foreach my $project (@plist) {
	    if ($project->AccessCheck($this_user, TB_PROJECT_CREATEEXPT())) {
		push(@projlist, $project->urn());
	    }
	}
	if (!@projlist) {
	    fatal("No projects to create experiments in");
	}
    }

    #
    # Portal argument says to ignore aggregate argument, and contact
    # all aggregates listed for the portal. 
    #
    if (defined($portal)) {
	@aggregates = ();
	
	my @list = APT_Aggregate->LookupForPortal($portal);
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	foreach my $agg (@list) {
	    my $authority = APT_Geni::GetAuthority($agg->urn());
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	    if (!defined($authority)) {
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		$errmsg = "Cannot lookup authority for $agg";
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		goto bad;
	    }
	    push(@aggregates, $authority);
	}
    }

    my $coderef = sub {
	my ($blob) = @_;
	my $authority = $blob->{"authority"};
	my $webtask   = $blob->{"webtask"};
	
	# PortalRPC will use the root context in this case, which is
	# essentially saying the caller is an admin. But thats okay
	# for this call, it is just informational.
	my $response =
	    APT_Geni::PortalRPC($authority, undef,
				"ReservationPrediction",
				{"projlist" => \@projlist});
	
	if (GeniResponse::IsError($response)) {
	    #
	    # All errors are fatal.
	    #
	    if (defined($webtask)) {
		$webtask->output($response->output());
		$webtask->Exited(-1);
	    }
	    else {
		print STDERR "$authority: " . $response->output() . "\n";
	    }
	    return -1;
	}
	if (defined($webtask)) {
	    $webtask->value($response->value());
	    $webtask->Exited(0);
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	    $webtask->Store();
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	}
	return 0;
    };
    #
    # Multiple aggregates, we use parrun. We need a webtask for each
    # authority to communicate the results back to the parent, who
    # then combines them all.
    #
    my @return_codes = ();
    my @agglist = ();

    foreach my $auth (@aggregates) {
	my $temptask = WebTask->CreateAnonymous();
	# For delete below.
	push(@webtasks, $temptask);
	push(@agglist, {"authority" => $auth,
			"webtask"   => $temptask});
    }
    if (ParRun({"maxwaittime" => 60,
		"maxchildren" => scalar(@agglist)},
	    \@return_codes, $coderef, @agglist)) {
	#
	# The parent caught a signal. Leave things intact so that we can
	# kill things cleanly later.
	#
	$errmsg = "Internal error get reservation prediction info";
	goto bad;
    }
    #
    # Check the exit codes, create return structure for the web interface.
    #
    my $blob = {};
    
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    foreach my $agg (@agglist) {
	my $code  = shift(@return_codes);
	my $auth  = $agg->{'authority'};
	my $wtask = $agg->{'webtask'};

	$wtask->Refresh();

	if ($code) {
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	    $errmsg  = "$auth: " . $wtask->output();
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	    goto bad;
	}
	$blob->{$auth->urn()} = $wtask->value();
    }
    if (defined($webtask)) {
	$webtask->value($blob);
	$webtask->Exited(0);
    }
    else {
	print Dumper($blob);
    }
    foreach my $temptask (@webtasks) {
	$temptask->Delete();
    }
    exit(0);

  bad:
    foreach my $temptask (@webtasks) {
	$temptask->Delete();
    }
    fatal($errmsg);
}

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sub fatal($)
{
    my ($mesg) = @_;

    if (defined($webtask)) {
	$webtask->output($mesg);
	$webtask->code(-1);
    }
    print STDERR "*** $0:\n".
	         "    $mesg\n";
    # Exit with negative status so web interface treats it as system error.
    exit(-1);
}

sub UserError($)
{
    my ($mesg) = @_;

    if (defined($webtask)) {
	$webtask->output($mesg);
	$webtask->code(1);
    }
    print STDERR "*** $0:\n".
	         "    $mesg\n";
    exit(1);
}

sub readfile($) {
    local $/ = undef;
    my ($filename) = @_;
    open(FILE, $filename) or fatal("Could not open $filename: $!");
    my $contents = <FILE>;
    close(FILE);
    return $contents;
}

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#
# Add or Edit a reservation announcement.
#
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sub AddAnnouncement($$$$$$$)
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{
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    my ($portal, $brand, $uuid, $user, $nodes, $type, $start) = @_;
    my $this_uid = $user->uid();
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    my $nickname = $aggregate->nickname();
    my $name     = $aggregate->name();
    my $url      = $brand->wwwBase() .
	"/reserve.php?edit=1&uuid=${uuid}&cluster=${nickname}";
    my $text = "You have a reservation at $name for $nodes $type ".
	"node(s) starting soon.";
    my $command;
    my $dateopt = "";

    #
    # If the reservation is more then 24 hours out, schedule an announcement
    # for 24 hours ahead. 
    #
    if (defined($start)) {
	if ($start !~ /^\d+$/) {
	    $start = str2time($start);
	}
	if ($start - time() > (3600 * 24)) {
	    $dateopt = "-S " . ($start - (3600 * 23));
	}
    }

    # This is awkward, the announcement stuff should be a library some day.
    my $query_result =
	emdb::DBQueryWarn("select idx from apt_announcements where uuid='$uuid'");
    return
	if (!$query_result);
    # Update mode.
    if ($query_result->numrows) {
	$command = "$ANNOUNCE -A $uuid -b 'View Reservation' ".
	    "-u '$url' $dateopt '$text'";
    }
    else {
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	$command = "$ANNOUNCE -a -p $portal -U $this_uid -I 4 ".
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	    "-b 'View Reservation' -u '$url' -t $uuid $dateopt '$text'";
    }
    system($command);
}
sub DeleteAnnouncement($)
{
    my ($uuid) = @_;

    system("$ANNOUNCE -R $uuid");    
}