If we are invoked from the command line, log the messages to standard error,...

If we are invoked from the command line, log the messages to standard error, instead of ignoring them.

lib/SimpleSAML/Logger.php

@@ -365,6 +365,8 @@ class Logger
             $sh = new \SimpleSAML_Logger_LoggingHandlerFile();
         } elseif ($handler === 'errorlog') {
             $sh = new \SimpleSAML_Logger_LoggingHandlerErrorLog();
+        } elseif ($handler === 'stderr') {
+            $sh = new \SimpleSAML\Logger\StandardError();
         } else {
             throw new \Exception(
                 'Invalid value for the [logging.handler] configuration option. Unknown handler: '.$handler
@@ -381,12 +383,17 @@ class Logger
 
     private static function log($level, $string, $statsLog = false)
     {
-        if (php_sapi_name() === 'cli' || defined('STDIN')) {
-            // we are being executed from the CLI, nowhere to log
+        if (self::$loggingHandler === false) {
+            // some error occurred while initializing logging
+            self::defer($level, $string, $statsLog);
             return;
-        }
-
-        if (self::$loggingHandler === null) {
+        } elseif (php_sapi_name() === 'cli' || defined('STDIN')) {
+            // we are being executed from the CLI, nowhere to log
+            if (is_null(self::$loggingHandler)) {
+                self::createLoggingHandler('stderr');
+            }
+            $_SERVER['REMOTE_ADDR'] = "CLI";
+        } elseif (self::$loggingHandler === null) {
             // Initialize logging
             self::createLoggingHandler();
 
@@ -396,9 +403,6 @@ class Logger
                     self::log($msg['level'], $msg['string'], $msg['statsLog']);
                 }
             }
-        } elseif (self::$loggingHandler === false) {
-            self::defer($level, $string, $statsLog);
-            return;
         }
 
         if (self::$captureLog) {