SimpleSAML_Utilities: Add getTempDir()-function.

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@1761 44740490-163a-0410-bde0-09ae8108e29a

config-templates/config.php

@@ -29,6 +29,13 @@ $config = array (
 	'dictionarydir'         => 'dictionaries/',
 	'loggingdir'            => 'log/',
 
+	/*
+	 * A directory where simpleSAMLphp can save temporary files.
+	 *
+	 * SimpleSAMLphp will attempt to create this directory if it doesn't exist.
+	 */
+	'tempdir'               => '/tmp/simplesaml',
+
 	'version'				=>	'trunk',
 	
 	/**

lib/SimpleSAML/Utilities.php

@@ -2027,6 +2027,36 @@ class SimpleSAML_Utilities {
 		}
 	}
 
+
+	/**
+	 * Get temp directory path.
+	 *
+	 * This function retrieves the path to a directory where
+	 * temporary files can be saved.
+	 *
+	 * @return string  Path to temp directory, without a trailing '/'.
+	 */
+	public static function getTempDir() {
+
+		$globalConfig = SimpleSAML_Configuration::getInstance();
+
+		$tempDir = $globalConfig->getString('tempdir', '/tmp/simplesaml');
+
+		while (substr($tempDir, -1) === '/') {
+			$tempDir = substr($tempDir, 0, -1);
+		}
+
+		if (!is_dir($tempDir)) {
+			$ret = mkdir($tempDir, 0700, TRUE);
+			if (!$ret) {
+				throw new SimpleSAML_Error_Exception('Error creating temp dir ' .
+					var_export($tempDir, TRUE) . ': ' . SimpleSAML_Utilities::getLastError());
+			}
+		}
+
+		return $tempDir;
+	}
+
 }
 
 ?>
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