changecreator.in 4.81 KB
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#!/usr/bin/perl -w
#
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# Copyright (c) 2008-2009 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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#
use strict;
use English;
use Getopt::Std;

#
# Change the creator of a swapped out experiment.
#
sub usage()
{
    print(STDERR "Usage: changecreator <pid,eid> <newuid>\n");
    exit(-1);
}
my $optlist = "df";
my $debug   = 0;
my $force   = 0;

#
# Configure variables
#
my $TB		= "@prefix@";
my $CHOWN       = "/usr/sbin/chown";

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

# libdb
my $EXPT_PRELOAD  = TBDB_STATS_PRELOAD();
my $EXPT_START    = TBDB_STATS_START();

# 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");
}

# Map invoking user to object.
my $this_user = User->ThisUser();
if (! defined($this_user)) {
    fatal("You ($UID) do not exist!");
}
# Only admin types!
if (! $this_user->IsAdmin()) {
    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.
#
my %options = ();
if (! getopts($optlist, \%options)) {
    usage();
}
if (defined($options{"d"})) {
    $debug = 1;
}
if (defined($options{"f"})) {
    $force = 1;
}
if (@ARGV != 2) {
    usage();
}
my $pideid = shift(@ARGV);
my $newuid = shift(@ARGV);

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

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

#
# User must be in the same project as the experiment.
#
if (!defined($experiment->GetProject()->LookupUser($target_user))) {
    fatal("$target_user is not in the same project as $experiment");
}

#
# Only operate on approved users and swapped out experiments.
# 
if ($target_user->status() ne USERSTATUS_ACTIVE()) {
    fatal("User '$newuid' must be an active user!");
}
if ($experiment->state() ne EXPTSTATE_SWAPPED()) {
    fatal("$experiment must be swapped out!");
}
my $exptidx = $experiment->idx();

#
# Only change the resource record if the experiment was never swapped in
# or modified, so that the first resource record matches the creator in
# the experiment_stats and experiments table.
#
if (!defined($experiment->lastidx())) {
    my $rsrcidx = $experiment->rsrcidx();

    DBQueryFatal("update experiment_resources set uid_idx=$target_idx ".
		 "where idx=$rsrcidx");
}

DBQueryFatal("update experiment_stats set ".
	     "  creator='$target_uid',creator_idx=$target_idx ".
	     "where exptidx=$exptidx");

#
# Change the very first testbed_stats record to be consistent.
#
DBQueryFatal("update testbed_stats set ".
	     "  uid='$target_uid',uid_idx=$target_idx ".
	     "where exptidx=$exptidx and ".
	     "      (action='$EXPT_PRELOAD' or action='$EXPT_START')");

#
# No need to change the swapper; if it was never swapped in there is
# no swapper, and if it was swapped in, its obviously swapped out now,
# and it is safe to leave it as is.
#
DBQueryFatal("update experiments set ".
	     "  expt_head_uid='$target_uid',creator_idx=$target_idx ".
	     "where idx=$exptidx");

#
# Now chown the three directories.
#
my $workdir = $experiment->WorkDir();
my $userdir = $experiment->UserDir();
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my $infodir = $experiment->InfoDir();
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if (system("$CHOWN $target_uid $workdir")) {
    fatal("Failed: '$CHOWN $target_user $workdir'");
}
if (system("$CHOWN $target_uid $userdir")) {
    fatal("Failed: '$CHOWN $target_user $userdir'");
}
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if (system("$CHOWN $target_uid $infodir")) {
    fatal("Failed: '$CHOWN $target_user $infodir'");
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}
	     
exit(0);

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

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