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<?php
/*
* ecl.php
*
* Copyright (c) 2010-2015 Electric Sheep Fencing, LLC. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
require_once("globals.inc");
require_once("functions.inc");
require_once("config.lib.inc");
require_once("config.inc");
$debug = false;
function get_boot_disk() {
global $g, $debug;
$disk = exec("/sbin/mount | /usr/bin/grep \"on / \" | /usr/bin/cut -d'/' -f3 | /usr/bin/cut -d' ' -f1");
return $disk;
}
function get_swap_disks() {
exec("/usr/sbin/swapinfo | /usr/bin/sed '/^\/dev/!d; s,^/dev/,,; s, .*\$,,'", $disks);
return $disks;
}
function get_disk_slices($disk) {
global $g, $debug;
$slices = glob("/dev/" . $disk . "s*");
$slices = str_replace("/dev/", "", $slices);
return $slices;
}
function get_disks() {
global $g, $debug;
$disks_array = array();
$disks_s = explode(" ", get_single_sysctl("kern.disks"));
foreach ($disks_s as $disk) {
if (trim($disk)) {
$disks_array[] = $disk;
}
}
return $disks_array;
}
function discover_config($mountpoint) {
global $g, $debug;
$locations_to_check = array("/", "/config");
foreach ($locations_to_check as $ltc) {
$tocheck = "/tmp/mnt/cf{$ltc}config.xml";
if ($debug) {
echo "\nChecking for $tocheck";
if (file_exists($tocheck)) {
echo " -> found!";
}
}
if (file_exists($tocheck)) {
return $tocheck;
}
}
return "";
}
function test_config($file_location) {
global $g, $debug;
if (!$file_location) {
return;
}
// config.xml was found. ensure it is sound.
$root_obj = trim("<{$g['xml_rootobj']}>");
$xml_file_head = exec("/usr/bin/head -2 " . escapeshellarg($file_location) . " | /usr/bin/tail -n1");
if ($debug) {
echo "\nroot obj = $root_obj";
echo "\nfile head = $xml_file_head";
}
if ($xml_file_head == $root_obj) {
// Now parse config to make sure
$config_status = config_validate($file_location);
if ($config_status) {
return true;
}
}
return false;
}
// Probes all disks looking for config.xml
function find_config_xml() {
global $g, $debug;
$disks = get_disks();
// Safety check.
if (!is_array($disks)) {
return;
}
$boot_disk = get_boot_disk();
$swap_disks = get_swap_disks();
exec("/bin/mkdir -p /tmp/mnt/cf");
foreach ($disks as $disk) {
$slices = get_disk_slices($disk);
if (is_array($slices)) {
foreach ($slices as $slice) {
if ($slice == "") {
continue;
}
if (stristr($slice, $boot_disk)) {
if ($debug) {
echo "\nSkipping boot device slice $slice";
}
continue;
}
if (in_array($slice, $swap_disks)) {
if ($debug) {
echo "\nSkipping swap device slice $slice";
}
continue;
}
echo " $slice";
// First try msdos fs
if ($debug) {
echo "\n/sbin/mount -t msdosfs /dev/{$slice} /tmp/mnt/cf 2>/dev/null \n";
}
$result = exec("/sbin/mount -t msdosfs /dev/{$slice} /tmp/mnt/cf 2>/dev/null");
// Next try regular fs (ufs)
if (!$result) {
if ($debug) {
echo "\n/sbin/mount /dev/{$slice} /tmp/mnt/cf 2>/dev/null \n";
}
$result = exec("/sbin/mount /dev/{$slice} /tmp/mnt/cf 2>/dev/null");
}
$mounted = trim(exec("/sbin/mount | /usr/bin/grep -v grep | /usr/bin/grep '/tmp/mnt/cf' | /usr/bin/wc -l"));
if ($debug) {
echo "\nmounted: $mounted ";
}
if (intval($mounted) > 0) {
// Item was mounted - look for config.xml file
$config_location = discover_config($slice);
if ($config_location) {
if (test_config($config_location)) {
// We have a valid configuration. Install it.
echo " -> found config.xml\n";
echo "Backing up old configuration...\n";
backup_config();
echo "Restoring [{$slice}] {$config_location}...\n";
restore_backup($config_location);
echo "Cleaning up...\n";
exec("/sbin/umount /tmp/mnt/cf");
exit;
}
}
exec("/sbin/umount /tmp/mnt/cf");
}
}
}
}
}
echo "External config loader 1.0 is now starting...";
find_config_xml();
echo "\n";
?>
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