Fixed: FS#2418 - PHP: Timezone ID 'CEST' is invalid

Author: tbrehm

install/install.php

@@ -104,16 +104,7 @@
 
 //** Select the language and set default timezone
 $conf['language'] = $inst->simple_query('Select language', array('en','de'), 'en');
-
-exec('date +%z', $tmp_out);
-$tmp_zone = intval($tmp_out[0]);
-if(substr($tmp_out[0],0,1) == '+') {
-	$conf['timezone'] = 'Etc/GMT+'.$tmp_zone;
-} else {
-	$conf['timezone'] = 'Etc/GMT-'.$tmp_zone;
-}
-unset($tmp_out);
-unset($tmp_zone);
+$conf['timezone'] = get_system_timezone();
 
 //* Set defaukt theme
 $conf['theme'] = 'default';

install/lib/install.lib.php

@@ -750,6 +750,55 @@ function is_ispconfig_ssl_enabled() {
 	}
 }
 
+/** 
+  Function to find the hash file for timezone detection
+  (c) 2012 Marius Cramer, pixcept KG, m.cramer@pixcept.de
+*/
+function find_hash_file($hash, $dir, $basedir = '') {
+    $res = opendir($dir);
+    if(!$res) return false;
+    
+    if(substr($dir, -1) === '/') $dir = substr($dir, 0, strlen($dir) - 1);
+    if($basedir === '') $basedir = $dir;
+    
+    while($cur = readdir($res)) {
+        if($cur == '.' || $cur == '..') continue;
+        $entry = $dir.'/'.$cur;
+        if(is_dir($entry)) {
+            $result = find_hash_file($hash, $entry, $basedir);
+            if($result !== false) return $result;
+        } elseif(md5_file($entry) === $hash) {
+            $entry = substr($entry, strlen($basedir));
+            if(substr($entry, 0, 7) === '/posix/') $entry = substr($entry, 7);
+            return $entry;
+        }
+    }
+    closedir($res);
+    return false;
+}
+
+/** 
+  Function to get the timezone of the Linux system
+  (c) 2012 Marius Cramer, pixcept KG, m.cramer@pixcept.de
+*/
+function get_system_timezone() {
+	if(is_link('/etc/localtime')) {
+		$timezone = readlink('/etc/localtime');
+		$timezone = str_replace('/usr/share/zoneinfo/', '', $timezone);
+		if(substr($timezone, 0, 6) === 'posix/') $timezone = substr($timezone, 6);
+	} else {
+		$hash = md5_file('/etc/localtime');
+		$timezone = find_hash_file($hash, '/usr/share/zoneinfo');
+	}
+
+	if(!$timezone) {
+		exec('date +%Z', $tzinfo);
+		$timezone = $tzinfo[0];
+	}
+
+	return $timezone;
+}
+
 
 
 ?>