diff --git a/apps/files_external/3rdparty/composer.json b/apps/files_external/3rdparty/composer.json
index 4ae2b7d011..4c130404ad 100644
--- a/apps/files_external/3rdparty/composer.json
+++ b/apps/files_external/3rdparty/composer.json
@@ -8,7 +8,7 @@
 		"classmap-authoritative": true
 	},
 	"require": {
-		"icewind/smb": "1.0.4",
+		"icewind/smb": "1.0.5",
 		"icewind/streams": "0.2"
 	}
 }
diff --git a/apps/files_external/3rdparty/composer.lock b/apps/files_external/3rdparty/composer.lock
index 033a5a17a1..7bfb48a2c0 100644
--- a/apps/files_external/3rdparty/composer.lock
+++ b/apps/files_external/3rdparty/composer.lock
@@ -4,20 +4,21 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "hash": "5c612406bc1235075305b09a5d6996a9",
+    "hash": "669663944c7232473a1c51a6d160319d",
+    "content-hash": "7612ced4391f6287fb3e50534500d217",
     "packages": [
         {
             "name": "icewind/smb",
-            "version": "v1.0.4",
+            "version": "v1.0.5",
             "source": {
                 "type": "git",
                 "url": "https://github.com/icewind1991/SMB.git",
-                "reference": "9277bd20262a01b38a33cc7356e98055f2262d32"
+                "reference": "acb94a0a85290d653cd64c883175b855ada5022f"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/icewind1991/SMB/zipball/9277bd20262a01b38a33cc7356e98055f2262d32",
-                "reference": "9277bd20262a01b38a33cc7356e98055f2262d32",
+                "url": "https://api.github.com/repos/icewind1991/SMB/zipball/acb94a0a85290d653cd64c883175b855ada5022f",
+                "reference": "acb94a0a85290d653cd64c883175b855ada5022f",
                 "shasum": ""
             },
             "require": {
@@ -25,7 +26,8 @@
                 "php": ">=5.3"
             },
             "require-dev": {
-                "satooshi/php-coveralls": "dev-master"
+                "phpunit/phpunit": "^4.8",
+                "satooshi/php-coveralls": "v1.0.0"
             },
             "type": "library",
             "autoload": {
@@ -45,7 +47,7 @@
                 }
             ],
             "description": "php wrapper for smbclient and libsmbclient-php",
-            "time": "2015-08-17 14:20:38"
+            "time": "2016-01-20 13:12:36"
         },
         {
             "name": "icewind/streams",
diff --git a/apps/files_external/3rdparty/composer/LICENSE b/apps/files_external/3rdparty/composer/LICENSE
new file mode 100644
index 0000000000..c8d57af8b2
--- /dev/null
+++ b/apps/files_external/3rdparty/composer/LICENSE
@@ -0,0 +1,21 @@
+
+Copyright (c) 2015 Nils Adermann, Jordi Boggiano
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is furnished
+to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+
diff --git a/apps/files_external/3rdparty/composer/autoload_classmap.php b/apps/files_external/3rdparty/composer/autoload_classmap.php
index d5b0d51e82..5b0f2511e1 100644
--- a/apps/files_external/3rdparty/composer/autoload_classmap.php
+++ b/apps/files_external/3rdparty/composer/autoload_classmap.php
@@ -22,6 +22,7 @@ return array(
     'Icewind\\SMB\\Exception\\InvalidHostException' => $vendorDir . '/icewind/smb/src/Exception/InvalidHostException.php',
     'Icewind\\SMB\\Exception\\InvalidPathException' => $vendorDir . '/icewind/smb/src/Exception/InvalidPathException.php',
     'Icewind\\SMB\\Exception\\InvalidRequestException' => $vendorDir . '/icewind/smb/src/Exception/InvalidRequestException.php',
+    'Icewind\\SMB\\Exception\\InvalidResourceException' => $vendorDir . '/icewind/smb/src/Exception/InvalidResourceException.php',
     'Icewind\\SMB\\Exception\\InvalidTypeException' => $vendorDir . '/icewind/smb/src/Exception/InvalidTypeException.php',
     'Icewind\\SMB\\Exception\\NoLoginServerException' => $vendorDir . '/icewind/smb/src/Exception/NoLoginServerException.php',
     'Icewind\\SMB\\Exception\\NoRouteToHostException' => $vendorDir . '/icewind/smb/src/Exception/NoRouteToHostException.php',
@@ -40,6 +41,14 @@ return array(
     'Icewind\\SMB\\RawConnection' => $vendorDir . '/icewind/smb/src/RawConnection.php',
     'Icewind\\SMB\\Server' => $vendorDir . '/icewind/smb/src/Server.php',
     'Icewind\\SMB\\Share' => $vendorDir . '/icewind/smb/src/Share.php',
+    'Icewind\\SMB\\System' => $vendorDir . '/icewind/smb/src/System.php',
+    'Icewind\\SMB\\Test\\AbstractShare' => $vendorDir . '/icewind/smb/tests/AbstractShare.php',
+    'Icewind\\SMB\\Test\\NativeShare' => $vendorDir . '/icewind/smb/tests/NativeShare.php',
+    'Icewind\\SMB\\Test\\NativeStream' => $vendorDir . '/icewind/smb/tests/NativeStream.php',
+    'Icewind\\SMB\\Test\\Parser' => $vendorDir . '/icewind/smb/tests/Parser.php',
+    'Icewind\\SMB\\Test\\Server' => $vendorDir . '/icewind/smb/tests/Server.php',
+    'Icewind\\SMB\\Test\\Share' => $vendorDir . '/icewind/smb/tests/Share.php',
+    'Icewind\\SMB\\Test\\TestCase' => $vendorDir . '/icewind/smb/tests/TestCase.php',
     'Icewind\\SMB\\TimeZoneProvider' => $vendorDir . '/icewind/smb/src/TimeZoneProvider.php',
     'Icewind\\Streams\\CallbackWrapper' => $vendorDir . '/icewind/streams/src/CallbackWrapper.php',
     'Icewind\\Streams\\Directory' => $vendorDir . '/icewind/streams/src/Directory.php',
diff --git a/apps/files_external/3rdparty/composer/installed.json b/apps/files_external/3rdparty/composer/installed.json
index 89c8ed5652..6e0b5d0d8f 100644
--- a/apps/files_external/3rdparty/composer/installed.json
+++ b/apps/files_external/3rdparty/composer/installed.json
@@ -43,17 +43,17 @@
     },
     {
         "name": "icewind/smb",
-        "version": "v1.0.4",
-        "version_normalized": "1.0.4.0",
+        "version": "v1.0.5",
+        "version_normalized": "1.0.5.0",
         "source": {
             "type": "git",
             "url": "https://github.com/icewind1991/SMB.git",
-            "reference": "9277bd20262a01b38a33cc7356e98055f2262d32"
+            "reference": "acb94a0a85290d653cd64c883175b855ada5022f"
         },
         "dist": {
             "type": "zip",
-            "url": "https://api.github.com/repos/icewind1991/SMB/zipball/9277bd20262a01b38a33cc7356e98055f2262d32",
-            "reference": "9277bd20262a01b38a33cc7356e98055f2262d32",
+            "url": "https://api.github.com/repos/icewind1991/SMB/zipball/acb94a0a85290d653cd64c883175b855ada5022f",
+            "reference": "acb94a0a85290d653cd64c883175b855ada5022f",
             "shasum": ""
         },
         "require": {
@@ -61,9 +61,10 @@
             "php": ">=5.3"
         },
         "require-dev": {
-            "satooshi/php-coveralls": "dev-master"
+            "phpunit/phpunit": "^4.8",
+            "satooshi/php-coveralls": "v1.0.0"
         },
-        "time": "2015-08-17 14:20:38",
+        "time": "2016-01-20 13:12:36",
         "type": "library",
         "installation-source": "source",
         "autoload": {
diff --git a/apps/files_external/3rdparty/icewind/smb/composer.json b/apps/files_external/3rdparty/icewind/smb/composer.json
index 593eb72871..2e1fd35f7a 100644
--- a/apps/files_external/3rdparty/icewind/smb/composer.json
+++ b/apps/files_external/3rdparty/icewind/smb/composer.json
@@ -13,7 +13,8 @@
 		"icewind/streams": "0.2.*"
 	},
 	"require-dev": {
-		"satooshi/php-coveralls"  : "dev-master"
+		"satooshi/php-coveralls"  : "v1.0.0",
+		"phpunit/phpunit": "^4.8"
 	},
 	"autoload"         : {
 		"psr-4": {
diff --git a/apps/files_external/3rdparty/icewind/smb/src/Connection.php b/apps/files_external/3rdparty/icewind/smb/src/Connection.php
index c857398c32..f48dcb766e 100644
--- a/apps/files_external/3rdparty/icewind/smb/src/Connection.php
+++ b/apps/files_external/3rdparty/icewind/smb/src/Connection.php
@@ -39,13 +39,22 @@ class Connection extends RawConnection {
 		if (!$this->isValid()) {
 			throw new ConnectionException('Connection not valid');
 		}
-		$line = $this->readLine(); //first line is prompt
-		$this->checkConnectionError($line);
+		$promptLine = $this->readLine(); //first line is prompt
+		$this->checkConnectionError($promptLine);
 
 		$output = array();
 		$line = $this->readLine();
 		if ($line === false) {
-			throw new ConnectException('Unknown error');
+			if ($promptLine) { //maybe we have some error we missed on the previous line
+				throw new ConnectException('Unknown error (' . $promptLine . ')');
+			} else {
+				$error = $this->readError(); // maybe something on stderr
+				if ($error) {
+					throw new ConnectException('Unknown error (' . $error . ')');
+				} else {
+					throw new ConnectException('Unknown error');
+				}
+			}
 		}
 		$length = mb_strlen(self::DELIMITER);
 		while (mb_substr($line, 0, $length) !== self::DELIMITER) { //next prompt functions as delimiter
diff --git a/apps/files_external/3rdparty/icewind/smb/src/Exception/InvalidRequestException.php b/apps/files_external/3rdparty/icewind/smb/src/Exception/InvalidRequestException.php
index 0dccd8b909..882bf1677b 100644
--- a/apps/files_external/3rdparty/icewind/smb/src/Exception/InvalidRequestException.php
+++ b/apps/files_external/3rdparty/icewind/smb/src/Exception/InvalidRequestException.php
@@ -18,7 +18,10 @@ class InvalidRequestException extends Exception {
 	 * @param int $code
 	 */
 	public function __construct($path, $code = 0) {
-		parent::__construct('Invalid request for ' . $path, $code);
+		$class = get_class($this);
+		$parts = explode('\\', $class);
+		$baseName = array_pop($parts);
+		parent::__construct('Invalid request for ' . $path . ' (' . $baseName . ')', $code);
 		$this->path = $path;
 	}
 
diff --git a/apps/files_external/3rdparty/icewind/smb/src/Exception/InvalidResourceException.php b/apps/files_external/3rdparty/icewind/smb/src/Exception/InvalidResourceException.php
new file mode 100644
index 0000000000..b5fdb851ca
--- /dev/null
+++ b/apps/files_external/3rdparty/icewind/smb/src/Exception/InvalidResourceException.php
@@ -0,0 +1,11 @@
+<?php
+/**
+ * Copyright (c) 2014 Robin Appelman <icewind@owncloud.com>
+ * This file is licensed under the Licensed under the MIT license:
+ * http://opensource.org/licenses/MIT
+ */
+
+namespace Icewind\SMB\Exception;
+
+class InvalidResourceException extends Exception {
+}
diff --git a/apps/files_external/3rdparty/icewind/smb/src/NativeShare.php b/apps/files_external/3rdparty/icewind/smb/src/NativeShare.php
index 1f1d225c00..0b184fd585 100644
--- a/apps/files_external/3rdparty/icewind/smb/src/NativeShare.php
+++ b/apps/files_external/3rdparty/icewind/smb/src/NativeShare.php
@@ -7,6 +7,9 @@
 
 namespace Icewind\SMB;
 
+use Icewind\SMB\Exception\InvalidPathException;
+use Icewind\SMB\Exception\InvalidResourceException;
+
 class NativeShare extends AbstractShare {
 	/**
 	 * @var Server $server
@@ -193,11 +196,30 @@ class NativeShare extends AbstractShare {
 	 *
 	 * @throws \Icewind\SMB\Exception\NotFoundException
 	 * @throws \Icewind\SMB\Exception\InvalidTypeException
+	 * @throws \Icewind\SMB\Exception\InvalidPathException
+	 * @throws \Icewind\SMB\Exception\InvalidResourceException
 	 */
 	public function get($source, $target) {
+		if (!$target) {
+			throw new InvalidPathException('Invalid target path: Filename cannot be empty');
+		}
+		$targetHandle = @fopen($target, 'wb');
+		if (!$targetHandle) {
+			$error = error_get_last();
+			if (is_array($error)) {
+				$reason = $error['message'];
+			} else {
+				$reason = 'Unknown error';
+			}
+			throw new InvalidResourceException('Failed opening local file "' . $target . '" for writing: ' . $reason);
+		}
+
 		$this->connect();
 		$sourceHandle = $this->state->open($this->buildUrl($source), 'r');
-		$targetHandle = fopen($target, 'wb');
+		if (!$sourceHandle) {
+			fclose($targetHandle);
+			throw new InvalidResourceException('Failed opening remote file "' . $source . '" for reading');
+		}
 
 		while ($data = $this->state->read($sourceHandle, 4096)) {
 			fwrite($targetHandle, $data);
diff --git a/apps/files_external/3rdparty/icewind/smb/src/Parser.php b/apps/files_external/3rdparty/icewind/smb/src/Parser.php
index 6af70143c5..fc1d7f283a 100644
--- a/apps/files_external/3rdparty/icewind/smb/src/Parser.php
+++ b/apps/files_external/3rdparty/icewind/smb/src/Parser.php
@@ -11,6 +11,7 @@ use Icewind\SMB\Exception\AccessDeniedException;
 use Icewind\SMB\Exception\AlreadyExistsException;
 use Icewind\SMB\Exception\Exception;
 use Icewind\SMB\Exception\FileInUseException;
+use Icewind\SMB\Exception\InvalidResourceException;
 use Icewind\SMB\Exception\InvalidTypeException;
 use Icewind\SMB\Exception\NotEmptyException;
 use Icewind\SMB\Exception\NotFoundException;
@@ -42,6 +43,13 @@ class Parser {
 					$error = $part;
 				}
 			}
+
+			$notFoundMsg = 'Error opening local file ';
+			if (substr($output[0], 0, strlen($notFoundMsg)) === $notFoundMsg) {
+				$localPath = substr($output[0], strlen($notFoundMsg));
+				throw new InvalidResourceException('Failed opening local file "' . $localPath . '" for writing');
+			}
+
 			switch ($error) {
 				case ErrorCodes::PathNotFound:
 				case ErrorCodes::ObjectNotFound:
diff --git a/apps/files_external/3rdparty/icewind/smb/src/RawConnection.php b/apps/files_external/3rdparty/icewind/smb/src/RawConnection.php
index 15478511a7..88ab046ef3 100644
--- a/apps/files_external/3rdparty/icewind/smb/src/RawConnection.php
+++ b/apps/files_external/3rdparty/icewind/smb/src/RawConnection.php
@@ -94,6 +94,15 @@ class RawConnection {
 		return stream_get_line($this->getOutputStream(), 4086, "\n");
 	}
 
+	/**
+	 * read a line of output
+	 *
+	 * @return string
+	 */
+	public function readError() {
+		return trim(stream_get_line($this->getErrorStream(), 4086));
+	}
+
 	/**
 	 * get all output until the process closes
 	 *
diff --git a/apps/files_external/3rdparty/icewind/smb/src/Server.php b/apps/files_external/3rdparty/icewind/smb/src/Server.php
index bbc0475d5e..25f1720139 100644
--- a/apps/files_external/3rdparty/icewind/smb/src/Server.php
+++ b/apps/files_external/3rdparty/icewind/smb/src/Server.php
@@ -11,7 +11,6 @@ use Icewind\SMB\Exception\AuthenticationException;
 use Icewind\SMB\Exception\InvalidHostException;
 
 class Server {
-	const CLIENT = 'smbclient';
 	const LOCALE = 'en_US.UTF-8';
 
 	/**
@@ -34,6 +33,16 @@ class Server {
 	 */
 	protected $workgroup;
 
+	/**
+	 * @var \Icewind\SMB\System
+	 */
+	private $system;
+
+	/**
+	 * @var TimeZoneProvider
+	 */
+	private $timezoneProvider;
+
 	/**
 	 * Check if the smbclient php extension is available
 	 *
@@ -54,6 +63,8 @@ class Server {
 		$this->user = $user;
 		$this->workgroup = $workgroup;
 		$this->password = $password;
+		$this->system = new System();
+		$this->timezoneProvider = new TimeZoneProvider($host, $this->system);
 	}
 
 	/**
@@ -115,8 +126,12 @@ class Server {
 	 */
 	public function listShares() {
 		$workgroupArgument = ($this->workgroup) ? ' -W ' . escapeshellarg($this->workgroup) : '';
-		$command = Server::CLIENT . $workgroupArgument . ' --authentication-file=/proc/self/fd/3' .
-			' -gL ' . escapeshellarg($this->getHost());
+		$command = sprintf('%s %s --authentication-file=%s -gL %s',
+			$this->system->getSmbclientPath(),
+			$workgroupArgument,
+			System::getFD(3),
+			escapeshellarg($this->getHost())
+		);
 		$connection = new RawConnection($command);
 		$connection->writeAuthentication($this->getUser(), $this->getPassword());
 		$output = $connection->readAll();
@@ -166,7 +181,6 @@ class Server {
 	 * @return string
 	 */
 	public function getTimeZone() {
-		$command = 'net time zone -S ' . escapeshellarg($this->getHost());
-		return exec($command);
+		return $this->timezoneProvider->get();
 	}
 }
diff --git a/apps/files_external/3rdparty/icewind/smb/src/Share.php b/apps/files_external/3rdparty/icewind/smb/src/Share.php
index d9ab729025..694bd30bd0 100644
--- a/apps/files_external/3rdparty/icewind/smb/src/Share.php
+++ b/apps/files_external/3rdparty/icewind/smb/src/Share.php
@@ -34,6 +34,11 @@ class Share extends AbstractShare {
 	 */
 	protected $parser;
 
+	/**
+	 * @var \Icewind\SMB\System
+	 */
+	private $system;
+
 	/**
 	 * @param Server $server
 	 * @param string $name
@@ -42,7 +47,8 @@ class Share extends AbstractShare {
 		parent::__construct();
 		$this->server = $server;
 		$this->name = $name;
-		$this->parser = new Parser(new TimeZoneProvider($this->server->getHost()));
+		$this->system = new System();
+		$this->parser = new Parser(new TimeZoneProvider($this->server->getHost(), $this->system));
 	}
 
 	/**
@@ -55,9 +61,10 @@ class Share extends AbstractShare {
 			return;
 		}
 		$workgroupArgument = ($this->server->getWorkgroup()) ? ' -W ' . escapeshellarg($this->server->getWorkgroup()) : '';
-		$command = sprintf('%s %s --authentication-file=/proc/self/fd/3 %s',
-			Server::CLIENT,
+		$command = sprintf('%s %s --authentication-file=%s %s',
+			$this->system->getSmbclientPath(),
 			$workgroupArgument,
+			System::getFD(3),
 			escapeshellarg('//' . $this->server->getHost() . '/' . $this->name)
 		);
 		$this->connection = new Connection($command);
@@ -257,14 +264,15 @@ class Share extends AbstractShare {
 		// since returned stream is closed by the caller we need to create a new instance
 		// since we can't re-use the same file descriptor over multiple calls
 		$workgroupArgument = ($this->server->getWorkgroup()) ? ' -W ' . escapeshellarg($this->server->getWorkgroup()) : '';
-		$command = sprintf('%s %s --authentication-file=/proc/self/fd/3 %s',
-			Server::CLIENT,
+		$command = sprintf('%s %s --authentication-file=%s %s',
+			$this->system->getSmbclientPath(),
 			$workgroupArgument,
+			System::getFD(3),
 			escapeshellarg('//' . $this->server->getHost() . '/' . $this->name)
 		);
 		$connection = new Connection($command);
 		$connection->writeAuthentication($this->server->getUser(), $this->server->getPassword());
-		$connection->write('get ' . $source . ' /proc/self/fd/5');
+		$connection->write('get ' . $source . ' ' . System::getFD(5));
 		$connection->write('exit');
 		$fh = $connection->getFileOutputStream();
 		stream_context_set_option($fh, 'file', 'connection', $connection);
@@ -285,16 +293,17 @@ class Share extends AbstractShare {
 		// since returned stream is closed by the caller we need to create a new instance
 		// since we can't re-use the same file descriptor over multiple calls
 		$workgroupArgument = ($this->server->getWorkgroup()) ? ' -W ' . escapeshellarg($this->server->getWorkgroup()) : '';
-		$command = sprintf('%s %s --authentication-file=/proc/self/fd/3 %s',
-			Server::CLIENT,
+		$command = sprintf('%s %s --authentication-file=%s %s',
+			$this->system->getSmbclientPath(),
 			$workgroupArgument,
+			System::getFD(3),
 			escapeshellarg('//' . $this->server->getHost() . '/' . $this->name)
 		);
 		$connection = new Connection($command);
 		$connection->writeAuthentication($this->server->getUser(), $this->server->getPassword());
 		$fh = $connection->getFileInputStream();
 
-		$connection->write('put /proc/self/fd/4 ' . $target);
+		$connection->write('put ' . System::getFD(4) . ' ' . $target);
 		$connection->write('exit');
 
 		// use a close callback to ensure the upload is finished before continuing
diff --git a/apps/files_external/3rdparty/icewind/smb/src/System.php b/apps/files_external/3rdparty/icewind/smb/src/System.php
new file mode 100644
index 0000000000..192a0b3877
--- /dev/null
+++ b/apps/files_external/3rdparty/icewind/smb/src/System.php
@@ -0,0 +1,43 @@
+<?php
+/**
+ * Copyright (c) 2014 Robin Appelman <icewind@owncloud.com>
+ * This file is licensed under the Licensed under the MIT license:
+ * http://opensource.org/licenses/MIT
+ */
+
+namespace Icewind\SMB;
+
+use Icewind\SMB\Exception\Exception;
+
+class System {
+	private $smbclient;
+
+	private $net;
+
+	public static function getFD($num) {
+		$folders = array(
+			'/proc/self/fd',
+			'/dev/fd'
+		);
+		foreach ($folders as $folder) {
+			if (file_exists($folder)) {
+				return $folder . '/' . $num;
+			}
+		}
+		throw new Exception('Cant find file descriptor path');
+	}
+
+	public function getSmbclientPath() {
+		if (!$this->smbclient) {
+			$this->smbclient = trim(`which smbclient`);
+		}
+		return $this->smbclient;
+	}
+
+	public function getNetPath() {
+		if (!$this->net) {
+			$this->net = trim(`which net`);
+		}
+		return $this->net;
+	}
+}
diff --git a/apps/files_external/3rdparty/icewind/smb/src/TimeZoneProvider.php b/apps/files_external/3rdparty/icewind/smb/src/TimeZoneProvider.php
index 22406a4f95..86d7859a6f 100644
--- a/apps/files_external/3rdparty/icewind/smb/src/TimeZoneProvider.php
+++ b/apps/files_external/3rdparty/icewind/smb/src/TimeZoneProvider.php
@@ -19,16 +19,31 @@ class TimeZoneProvider {
 	private $timeZone;
 
 	/**
-	 * @param string $host
+	 * @var System
 	 */
-	function __construct($host) {
+	private $system;
+
+	/**
+	 * @param string $host
+	 * @param System $system
+	 */
+	function __construct($host, System $system) {
 		$this->host = $host;
+		$this->system = $system;
 	}
 
 	public function get() {
 		if (!$this->timeZone) {
-			$command = 'net time zone -S ' . escapeshellarg($this->host);
-			$this->timeZone = exec($command);
+			$net = $this->system->getNetPath();
+			if ($net) {
+				$command = sprintf('%s time zone -S %s',
+					$net,
+					escapeshellarg($this->host)
+				);
+				$this->timeZone = exec($command);
+			} else { // fallback to server timezone
+				$this->timeZone = date_default_timezone_get();
+			}
 		}
 		return $this->timeZone;
 	}