mirror of
https://github.com/moodle/moodle.git
synced 2025-01-19 14:27:22 +01:00
658 lines
23 KiB
PHP
658 lines
23 KiB
PHP
<?php //$Id$
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//This file contains all the general function needed (file manipulation...)
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//not directly part of the backup/restore utility
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require_once($CFG->dirroot.'/lib/uploadlib.php');
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//Sets a name/value pair in backup_config table
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function backup_set_config($name, $value) {
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if (get_field("backup_config", "name", "name", $name)) {
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return set_field("backup_config", "value", $value, "name", $name);
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} else {
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$config->name = $name;
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$config->value = $value;
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return insert_record("backup_config", $config);
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}
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}
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//Gets all the information from backup_config table
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function backup_get_config() {
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$backup_config = null;
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if ($configs = get_records("backup_config")) {
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foreach ($configs as $config) {
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$backup_config[$config->name] = $config->value;
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}
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}
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return (object)$backup_config;
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}
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//Delete old data in backup tables (if exists)
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//Four hours seem to be appropiate now that backup is stable
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function backup_delete_old_data() {
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global $CFG;
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//Change this if you want !!
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$hours = 4;
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//End change this
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$seconds = $hours * 60 * 60;
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$delete_from = time()-$seconds;
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//Now delete from tables
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$status = execute_sql("DELETE FROM {$CFG->prefix}backup_ids
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WHERE backup_code < '$delete_from'",false);
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if ($status) {
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$status = execute_sql("DELETE FROM {$CFG->prefix}backup_files
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WHERE backup_code < '$delete_from'",false);
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}
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//Now, delete old directory (if exists)
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if ($status) {
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$status = backup_delete_old_dirs($delete_from);
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}
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return($status);
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}
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//Function to delete dirs/files into temp/backup directory
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//older than $delete_from
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function backup_delete_old_dirs($delete_from) {
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global $CFG;
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$status = true;
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//Get files and directories in the temp backup dir witout descend
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$list = get_directory_list($CFG->dataroot."/temp/backup", "", false, true, true);
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foreach ($list as $file) {
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$file_path = $CFG->dataroot."/temp/backup/".$file;
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$moddate = filemtime($file_path);
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if ($status && $moddate < $delete_from) {
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//If directory, recurse
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if (is_dir($file_path)) {
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$status = delete_dir_contents($file_path);
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//There is nothing, delete the directory itself
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if ($status) {
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$status = rmdir($file_path);
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}
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//If file
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} else {
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unlink("$file_path");
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}
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}
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}
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return $status;
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}
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//Function to check and create the needed dir to
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//save all the backup
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function check_and_create_backup_dir($backup_unique_code) {
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global $CFG;
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$status = check_dir_exists($CFG->dataroot."/temp",true);
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if ($status) {
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$status = check_dir_exists($CFG->dataroot."/temp/backup",true);
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}
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if ($status) {
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$status = check_dir_exists($CFG->dataroot."/temp/backup/".$backup_unique_code,true);
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}
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return $status;
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}
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//Function to delete all the directory contents recursively
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//it supports a excluded dit too
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//Copied from the web !!
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function delete_dir_contents ($dir,$excludeddir="") {
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$slash = "/";
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// Create arrays to store files and directories
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$dir_files = array();
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$dir_subdirs = array();
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// Make sure we can delete it
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chmod($dir, 0777);
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if ((($handle = opendir($dir))) == FALSE) {
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// The directory could not be opened
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return false;
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}
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// Loop through all directory entries, and construct two temporary arrays containing files and sub directories
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while($entry = readdir($handle)) {
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if (is_dir($dir. $slash .$entry) && $entry != ".." && $entry != "." && $entry != $excludeddir) {
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$dir_subdirs[] = $dir. $slash .$entry;
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}
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else if ($entry != ".." && $entry != "." && $entry != $excludeddir) {
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$dir_files[] = $dir. $slash .$entry;
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}
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}
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// Delete all files in the curent directory return false and halt if a file cannot be removed
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for($i=0; $i<count($dir_files); $i++) {
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chmod($dir_files[$i], 0777);
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if (((unlink($dir_files[$i]))) == FALSE) {
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return false;
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}
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}
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// Empty sub directories and then remove the directory
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for($i=0; $i<count($dir_subdirs); $i++) {
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chmod($dir_subdirs[$i], 0777);
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if (delete_dir_contents($dir_subdirs[$i]) == FALSE) {
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return false;
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}
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else {
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if (rmdir($dir_subdirs[$i]) == FALSE) {
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return false;
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}
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}
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}
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// Close directory
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closedir($handle);
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// Success, every thing is gone return true
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return true;
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}
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//Function to clear (empty) the contents of the backup_dir
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function clear_backup_dir($backup_unique_code) {
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global $CFG;
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$rootdir = $CFG->dataroot."/temp/backup/".$backup_unique_code;
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//Delete recursively
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$status = delete_dir_contents($rootdir);
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return $status;
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}
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//Returns the module type of a course_module's id in a course
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function get_module_type ($courseid,$moduleid) {
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global $CFG;
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$results = get_records_sql ("SELECT cm.id, m.name
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FROM {$CFG->prefix}course_modules cm,
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{$CFG->prefix}modules m
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WHERE cm.course = '$courseid' AND
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cm.id = '$moduleid' AND
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m.id = cm.module");
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if ($results) {
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$name = $results[$moduleid]->name;
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} else {
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$name = false;
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}
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return $name;
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}
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//This function return the names of all directories under a give directory
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//Not recursive
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function list_directories ($rootdir) {
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$results = null;
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$dir = opendir($rootdir);
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while ($file=readdir($dir)) {
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if ($file=="." || $file=="..") {
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continue;
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}
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if (is_dir($rootdir."/".$file)) {
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$results[$file] = $file;
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}
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}
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closedir($dir);
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return $results;
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}
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//This function return the names of all directories and files under a give directory
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//Not recursive
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function list_directories_and_files ($rootdir) {
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$results = "";
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$dir = opendir($rootdir);
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while ($file=readdir($dir)) {
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if ($file=="." || $file=="..") {
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continue;
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}
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$results[$file] = $file;
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}
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closedir($dir);
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return $results;
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}
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//This function clean data from backup tables and
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//delete all temp files used
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function clean_temp_data ($preferences) {
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global $CFG;
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$status = true;
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//true->do it, false->don't do it. To debug if necessary.
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if (true) {
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//Now delete from tables
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$status = execute_sql("DELETE FROM {$CFG->prefix}backup_ids
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WHERE backup_code = '$preferences->backup_unique_code'",false);
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if ($status) {
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$status = execute_sql("DELETE FROM {$CFG->prefix}backup_files
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WHERE backup_code = '$preferences->backup_unique_code'",false);
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}
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//Now, delete temp directory (if exists)
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$file_path = $CFG->dataroot."/temp/backup/".$preferences->backup_unique_code;
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if (is_dir($file_path)) {
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$status = delete_dir_contents($file_path);
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//There is nothing, delete the directory itself
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if ($status) {
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$status = rmdir($file_path);
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}
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}
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}
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return $status;
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}
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// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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//This functions are used to copy any file or directory ($from_file)
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//to a new file or directory ($to_file). It works recursively and
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//mantains file perms.
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//I've copied it from: http://www.php.net/manual/en/function.copy.php
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//Little modifications done
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function backup_copy_file ($from_file,$to_file,$log_clam=false) {
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global $CFG;
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if (is_file($from_file)) {
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//echo "<br />Copying ".$from_file." to ".$to_file; //Debug
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//$perms=fileperms($from_file);
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//return copy($from_file,$to_file) && chmod($to_file,$perms);
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umask(0000);
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if (copy($from_file,$to_file)) {
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chmod($to_file,$CFG->directorypermissions);
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if (!empty($log_clam)) {
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clam_log_upload($to_file,null,true);
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}
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return true;
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}
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return false;
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}
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else if (is_dir($from_file)) {
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return backup_copy_dir($from_file,$to_file);
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}
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else{
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//echo "<br />Error: not file or dir ".$from_file; //Debug
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return false;
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}
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}
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function backup_copy_dir($from_file,$to_file) {
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global $CFG;
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$status = true; // Initialize this, next code will change its value if needed
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if (!is_dir($to_file)) {
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//echo "<br />Creating ".$to_file; //Debug
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umask(0000);
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$status = mkdir($to_file,$CFG->directorypermissions);
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}
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$dir = opendir($from_file);
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while ($file=readdir($dir)) {
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if ($file=="." || $file=="..") {
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continue;
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}
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$status = backup_copy_file ("$from_file/$file","$to_file/$file");
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}
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closedir($dir);
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return $status;
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}
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///Ends copy file/dirs functions
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// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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function upgrade_backup_db($continueto) {
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/// This function upgrades the backup tables, if necessary
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/// It's called from admin/index.php, also backup.php and restore.php
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global $CFG, $db;
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require_once ("$CFG->dirroot/backup/version.php"); // Get code versions
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if (empty($CFG->backup_version)) { // Backup has never been installed.
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$strdatabaseupgrades = get_string("databaseupgrades");
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print_header($strdatabaseupgrades, $strdatabaseupgrades, $strdatabaseupgrades, "",
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'<script type="text/javascript" src="' . $CFG->wwwroot . '/lib/scroll_to_errors.js"></script>',
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false, " ", " ");
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upgrade_log_start();
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$db->debug=true;
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if (modify_database("$CFG->dirroot/backup/db/$CFG->dbtype.sql")) {
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$db->debug = false;
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if (set_config("backup_version", $backup_version) and set_config("backup_release", $backup_release)) {
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notify(get_string("databasesuccess"), "green");
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notify(get_string("databaseupgradebackups", "", $backup_version), "green");
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print_continue($continueto);
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exit;
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} else {
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error("Upgrade of backup system failed! (Could not update version in config table)");
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}
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} else {
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error("Backup tables could NOT be set up successfully!");
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}
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}
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if ($backup_version > $CFG->backup_version) { // Upgrade tables
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$strdatabaseupgrades = get_string("databaseupgrades");
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print_header($strdatabaseupgrades, $strdatabaseupgrades, $strdatabaseupgrades, '',
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'<script type="text/javascript" src="' . $CFG->wwwroot . '/lib/scroll_to_errors.js"></script>');
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upgrade_log_start();
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require_once ("$CFG->dirroot/backup/db/$CFG->dbtype.php");
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$db->debug=true;
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if (backup_upgrade($CFG->backup_version)) {
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$db->debug=false;
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if (set_config("backup_version", $backup_version) and set_config("backup_release", $backup_release)) {
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notify(get_string("databasesuccess"), "green");
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notify(get_string("databaseupgradebackups", "", $backup_version), "green");
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print_continue($continueto);
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exit;
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} else {
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error("Upgrade of backup system failed! (Could not update version in config table)");
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}
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} else {
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$db->debug=false;
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error("Upgrade failed! See backup/version.php");
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}
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} else if ($backup_version < $CFG->backup_version) {
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upgrade_log_start();
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notify("WARNING!!! The code you are using is OLDER than the version that made these databases!");
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upgrade_log_finish();
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}
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}
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//This function is used to insert records in the backup_ids table
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//If the info field is greater than max_db_storage, then its info
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//is saved to filesystem
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function backup_putid ($backup_unique_code, $table, $old_id, $new_id, $info="") {
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global $CFG;
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$max_db_storage = 128; //Max bytes to save to db, else save to file
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$status = true;
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//First delete to avoid PK duplicates
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$status = backup_delid($backup_unique_code, $table, $old_id);
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//Now, serialize info
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$info_ser = serialize($info);
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//Now, if the size of $info_ser > $max_db_storage, save it to filesystem and
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//insert a "infile" in the info field
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if (strlen($info_ser) > $max_db_storage) {
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//Calculate filename (in current_backup_dir, $backup_unique_code_$table_$old_id.info)
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$filename = $CFG->dataroot."/temp/backup/".$backup_unique_code."/".$backup_unique_code."_".$table."_".$old_id.".info";
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//Save data to file
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$status = backup_data2file($filename,$info_ser);
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//Set info_to save
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$info_to_save = "infile";
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} else {
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//Saving to db, addslashes
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$info_to_save = addslashes($info_ser);
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}
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//Now, insert the record
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if ($status) {
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//Build the record
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$rec->backup_code = $backup_unique_code;
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$rec->table_name = $table;
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$rec->old_id = $old_id;
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$rec->new_id = ($new_id === null? 0 : $new_id);
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$rec->info = $info_to_save;
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if (!insert_record('backup_ids', $rec, false)) {
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$status = false;
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}
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}
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return $status;
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}
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//This function is used to delete recods from the backup_ids table
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//If the info field is "infile" then the file is deleted too
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function backup_delid ($backup_unique_code, $table, $old_id) {
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global $CFG;
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$status = true;
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$status = execute_sql("DELETE FROM {$CFG->prefix}backup_ids
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WHERE backup_code = $backup_unique_code AND
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table_name = '$table' AND
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old_id = '$old_id'",false);
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return $status;
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}
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//This function is used to get a record from the backup_ids table
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//If the info field is "infile" then its info
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//is read from filesystem
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function backup_getid ($backup_unique_code, $table, $old_id) {
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global $CFG;
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$status = true;
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$status2 = true;
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$status = get_record ("backup_ids","backup_code",$backup_unique_code,
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"table_name",$table,
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"old_id", $old_id);
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//If info field = "infile", get file contents
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if (!empty($status->info) && $status->info == "infile") {
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$filename = $CFG->dataroot."/temp/backup/".$backup_unique_code."/".$backup_unique_code."_".$table."_".$old_id.".info";
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//Read data from file
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$status2 = backup_file2data($filename,$info);
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if ($status2) {
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//unserialize data
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$status->info = unserialize($info);
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} else {
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$status = false;
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}
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} else {
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//Only if status (record exists)
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if ($status) {
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////First strip slashes
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$temp = stripslashes($status->info);
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//Now unserialize
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$status->info = unserialize($temp);
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}
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}
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return $status;
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}
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//This function is used to add slashes (and decode from UTF-8 if needed)
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//It's used intensivelly when restoring modules and saving them in db
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function backup_todb ($data) {
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global $CFG;
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if (empty($CFG->unicodedb)) {
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return restore_decode_absolute_links(addslashes(utf8_decode($data)));
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} else {
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return restore_decode_absolute_links(addslashes($data));
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}
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}
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//This function is used to check that every necessary function to
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//backup/restore exists in the current php installation. Thanks to
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//gregb@crowncollege.edu by the idea.
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function backup_required_functions($justcheck=false) {
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if(!function_exists('utf8_encode')) {
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if (empty($justcheck)) {
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error('You need to add XML support to your PHP installation');
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} else {
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return false;
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}
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}
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return true;
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}
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//This function send n white characters to the browser and flush the
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//output buffer. Used to avoid browser timeouts and to show the progress.
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function backup_flush($n=0,$time=false) {
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if (defined('RESTORE_SILENTLY_NOFLUSH')) {
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return;
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}
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if ($time) {
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$ti = strftime("%X",time());
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} else {
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$ti = "";
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}
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echo str_repeat(" ", $n) . $ti . "\n";
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flush();
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}
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//This function creates the filename and write data to it
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//returning status as result
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function backup_data2file ($file,&$data) {
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|
|
|
$status = true;
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|
$status2 = true;
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|
|
|
$f = fopen($file,"w");
|
|
$status = fwrite($f,$data);
|
|
$status2 = fclose($f);
|
|
|
|
return ($status && $status2);
|
|
}
|
|
|
|
//This function read the filename and read data from it
|
|
function backup_file2data ($file,&$data) {
|
|
|
|
$status = true;
|
|
$status2 = true;
|
|
|
|
$f = fopen($file,"r");
|
|
$data = fread ($f,filesize($file));
|
|
$status2 = fclose($f);
|
|
|
|
return ($status && $status2);
|
|
}
|
|
|
|
/** this function will restore an entire backup.zip into the specified course
|
|
* using standard moodle backup/restore functions, but silently.
|
|
* @param string $pathtofile the absolute path to the backup file.
|
|
* @param int $destinationcourse the course id to restore to.
|
|
* @param boolean $emptyfirst whether to delete all coursedata first.
|
|
* @param boolean $userdata whether to include any userdata that may be in the backup file.
|
|
*/
|
|
function import_backup_file_silently($pathtofile,$destinationcourse,$emptyfirst=false,$userdata=false) {
|
|
global $CFG,$SESSION,$USER; // is there such a thing on cron? I guess so..
|
|
|
|
if (empty($USER)) {
|
|
$USER = get_admin();
|
|
$USER->admin = 1; // not sure why, but this doesn't get set
|
|
}
|
|
|
|
define('RESTORE_SILENTLY',true); // don't output all the stuff to us.
|
|
|
|
$debuginfo = 'import_backup_file_silently: ';
|
|
$cleanupafter = false;
|
|
$errorstr = ''; // passed by reference to restore_precheck to get errors from.
|
|
|
|
if (!$course = get_record('course','id',$destinationcourse)) {
|
|
mtrace($debuginfo.'Course with id $destinationcourse was not a valid course!');
|
|
return false;
|
|
}
|
|
|
|
// first check we have a valid file.
|
|
if (!file_exists($pathtofile) || !is_readable($pathtofile)) {
|
|
mtrace($debuginfo.'File '.$pathtofile.' either didn\'t exist or wasn\'t readable');
|
|
return false;
|
|
}
|
|
|
|
// now make sure it's a zip file
|
|
require_once($CFG->dirroot.'/lib/filelib.php');
|
|
$filename = substr($pathtofile,strrpos($pathtofile,'/')+1);
|
|
$mimetype = mimeinfo("type", $filename);
|
|
if ($mimetype != 'application/zip') {
|
|
mtrace($debuginfo.'File '.$pathtofile.' was of wrong mimetype ('.$mimetype.')' );
|
|
return false;
|
|
}
|
|
|
|
// restore_precheck wants this within dataroot, so lets put it there if it's not already..
|
|
if (strstr($pathtofile,$CFG->dataroot) === false) {
|
|
// first try and actually move it..
|
|
if (!check_dir_exists($CFG->dataroot.'/temp/backup/',true)) {
|
|
mtrace($debuginfo.'File '.$pathtofile.' outside of dataroot and couldn\'t move it! ');
|
|
return false;
|
|
}
|
|
if (!copy($pathtofile,$CFG->dataroot.'/temp/backup/'.$filename)) {
|
|
mtrace($debuginfo.'File '.$pathtofile.' outside of dataroot and couldn\'t move it! ');
|
|
return false;
|
|
} else {
|
|
$pathtofile = 'temp/backup/'.$filename;
|
|
$cleanupafter = true;
|
|
}
|
|
} else {
|
|
// it is within dataroot, so take it off the path for restore_precheck.
|
|
$pathtofile = substr($pathtofile,strlen($CFG->dataroot.'/'));
|
|
}
|
|
|
|
if (!backup_required_functions()) {
|
|
mtrace($debuginfo.'Required function check failed (see backup_required_functions)');
|
|
return false;
|
|
}
|
|
|
|
@ini_set("max_execution_time","3000");
|
|
raise_memory_limit("128M");
|
|
|
|
if (!$backup_unique_code = restore_precheck($destinationcourse,$pathtofile,$errorstr,true)) {
|
|
mtrace($debuginfo.'Failed restore_precheck (error was '.$errorstr.')');
|
|
return false;
|
|
}
|
|
|
|
restore_setup_for_check($SESSION->restore,$backup_unique_code);
|
|
|
|
// add on some extra stuff we need...
|
|
$SESSION->restore->restoreto = 1;
|
|
$SESSION->restore->course_id = $destinationcourse;
|
|
$SESSION->restore->deleting = $emptyfirst;
|
|
|
|
// maybe we need users (defaults to 2 in restore_setup_for_check)
|
|
if (!empty($userdata)) {
|
|
$SESSION->restore->users = 1;
|
|
}
|
|
|
|
// we also need modules...
|
|
if ($allmods = get_records("modules")) {
|
|
foreach ($allmods as $mod) {
|
|
$modname = $mod->name;
|
|
//Now check that we have that module info in the backup file
|
|
if (isset($SESSION->info->mods[$modname]) && $SESSION->info->mods[$modname]->backup == "true") {
|
|
$SESSION->restore->mods[$modname]->restore = true;
|
|
$SESSION->restore->mods[$modname]->userinfo = $userdata;
|
|
}
|
|
}
|
|
}
|
|
if (!restore_execute($SESSION->restore,$SESSION->info,$SESSION->course_header,$errorstr)) {
|
|
mtrace($debuginfo.'Failed restore_execute (error was '.$errorstr.')');
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
?>
|