changeleader.in 4.22 KB
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#!/usr/bin/perl -wT
#
# Copyright (c) 2004, 2006, 2007 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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#
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use strict;
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use English;
use Getopt::Std;

#
# Change the project leader of a project, such as when a PI moves on.
# The old leader is switched to local root, so that we do not have to
# worry about existing experiments and subgroups. 
#
sub usage()
{
    print(STDERR "Usage: changeleader <pid> <newuid>\n");
    exit(-1);
}
my $optlist = "df";
my $debug   = 0;
my $force   = 0;

#
# Configure variables
#
my $TB		= "@prefix@";

#
# Testbed Support libraries
#
use lib "@prefix@/lib";
use libaudit;
use libdb;
use libtestbed;
use Project;
use User;

# Protos.
sub fatal($);

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

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

#
# This script is setuid, so please do not run it as root. Hard to track
# what has happened.
#
if ($UID == 0) {
    die("*** $0:\n".
	"    Please do not run this as root! Its already setuid!\n");
}

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# Map invoking user to object.
my $this_user = User->ThisUser();
if (! defined($this_user)) {
    fatal("You ($UID) do not exist!");
}
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# Only admin types!
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if (! $this_user->IsAdmin()) {
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    die("*** $0:\n".
	"    Only TB administrators can run this script!\n");
}

#
# Parse command arguments. Once we return from getopts, all that should be
# left are the required arguments.
#
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my %options = ();
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if (! getopts($optlist, \%options)) {
    usage();
}
if (defined($options{"d"})) {
    $debug = 1;
}
if (defined($options{"f"})) {
    $force = 1;
}
if (@ARGV != 2) {
    usage();
}
my $pid    = shift(@ARGV);
my $newuid = shift(@ARGV);

#
# This script is always audited. Mail is sent automatically upon exit.
#
if (AuditStart(0)) {
    #
    # Parent exits normally
    #
    exit(0);
}

# Map project to object.
my $project = Project->Lookup($pid);
if (! defined($pid)) {
    fatal("$pid does not exist!");
}

# Map target user to object.
my $target_user = User->Lookup($newuid);
if (! defined($target_user)) {
    fatal("$newuid does not exist!");
}

#
# Only operate on approved users.
# 
if ($target_user->status() ne USERSTATUS_ACTIVE()) {
    fatal("User '$newuid' must be an active user!");
}

my $projleader = $project->GetLeader();
if (! defined($projleader)) {
    fatal("Could not map project leader for $project to its object!");
}
if ($projleader->SameUser($target_user)) {
    fatal("$target_user is already the leader of $project!");
}

#
# First change the membership setting for old/new users. We set the old
# leader to local_root so that we do not have to worry about existing
# experiments and subgroups.
#
my $olduser_membership = $project->LookupUser($projleader);
if (!defined($olduser_membership)) {
    fatal("Could not get membership object for $projleader in $project!");
}
my $target_membership = $project->LookupUser($target_user);
if (!defined($target_membership)) {
    fatal("Could not get membership object for $target_user in $project!");
}

if ($olduser_membership->ModifyTrust($Group::MemberShip::TRUSTSTRING_LOCALROOT)
    != 0) {
    fatal("Could not change $olduser_membership to local root!");
}
if ($target_membership->ModifyTrust($Group::MemberShip::TRUSTSTRING_PROJROOT)
    != 0) {
    fatal("Could not change $target_membership to project root!");
}
# Now change the leader ...
if ($project->ChangeLeader($target_user) != 0) {
    fatal("Could not change leader for $project to $target_user!");
}
exit(0);

sub fatal($) {
    my($mesg) = $_[0];

    die("*** $0:\n".
	"    $mesg\n");
}