/usr/share/horde/wicked/diff.php is in php-horde-wicked 2.0.7-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/**
* Copyright 2003-2016 Horde LLC (http://www.horde.org/)
*
* See the enclosed file COPYING for license information (GPL). If you
* did not receive this file, see http://www.horde.org/licenses/gpl.
*
* @author Chuck Hagenbuch <chuck@horde.org>
*/
require_once __DIR__ . '/lib/Application.php';
Horde_Registry::appInit('wicked');
$v1 = Horde_Util::getFormData('v1');
$v2 = Horde_Util::getFormData('v2');
/* Bail out if we didn't get any versions - at least one of these has
* to be non-empty. */
if (!$v1 && !$v2) {
Horde::url('history.php', true)
->add('page', Horde_Util::getFormData('page'))
->redirect();
}
/* Make sure that $v2 is a higher version than $v1. Empty string is
* the current version of the page, so is always highest. Also, '?' is a
* wildcard for the previous version, so it's always the lowest. */
if (!$v1 || ($v2 && version_compare($v1, $v2) > 0) || $v2 == '?') {
$tmp = $v1;
$v1 = $v2;
$v2 = $tmp;
}
try {
$page = Wicked_Page::getPage(Horde_Util::getFormData('page'), $v2);
} catch (Wicked_Exception $e) {
$notification->push(sprintf(_("Internal error viewing requested page: %s"), $e->getMessage()), 'horde.error');
Wicked::url('Wiki/Home', true)->redirect();
}
if ($v1 == '?') {
$v1 = $page->previousVersion();
}
/* Kick back to the display page if we're not allowed to diff this
* page. */
if (!$page->allows(Wicked::MODE_DIFF)) {
Wicked::url($page->pageName(), true)
->add('actionID', 'diff')
->redirect();
}
Wicked::setTopbar();
$page_output->header(array(
'title' => sprintf(_("Diff for %s between %s and %s"), $page->pageName(), $v1, $page->version())
));
$notification->notify(array('listeners' => 'status'));
$page->render(Wicked::MODE_DIFF, $v1);
$page_output->footer();
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