diff --git a/indra/newview/app_settings/settings.xml b/indra/newview/app_settings/settings.xml
index 7254fff664a6a0e64f2b15cca2cc55e04102b11d..da7caad21e50829fc26343e4331337d56c3fc36d 100644
--- a/indra/newview/app_settings/settings.xml
+++ b/indra/newview/app_settings/settings.xml
@@ -5473,7 +5473,18 @@
     <key>QAModeEventHostPort</key>
     <map>
       <key>Comment</key>
-      <string>Enable Testing Features.</string>
+      <string>Port on which lleventhost should listen</string>
+      <key>Persist</key>
+      <integer>0</integer>
+      <key>Type</key>
+      <string>S32</string>
+      <key>Value</key>
+      <integer>-1</integer>
+    </map>
+    <key>QAModeTermCode</key>
+    <map>
+      <key>Comment</key>
+      <string>On LL_ERRS, terminate with this code instead of OS message box</string>
       <key>Persist</key>
       <integer>0</integer>
       <key>Type</key>
diff --git a/indra/newview/llappviewer.cpp b/indra/newview/llappviewer.cpp
index 873215169ee95b974d948ce0db2c0093cb642c64..e95eec47412194fbdd35e25fe063388893d4dda4 100644
--- a/indra/newview/llappviewer.cpp
+++ b/indra/newview/llappviewer.cpp
@@ -620,7 +620,19 @@ bool LLAppViewer::init()
 	
 	if (!initConfiguration())
 		return false;
-	
+
+	// Although initLogging() is the right place to mess with
+	// setFatalFunction(), we can't query gSavedSettings until after
+	// initConfiguration().
+	S32 rc(gSavedSettings.getS32("QAModeTermCode"));
+	if (rc >= 0)
+	{
+		// QAModeTermCode set, terminate with that rc on LL_ERRS. Use _exit()
+		// rather than exit() because normal cleanup depends too much on
+		// successful startup!
+		LLError::setFatalFunction(boost::bind(_exit, rc));
+	}
+
     mAlloc.setProfilingEnabled(gSavedSettings.getBOOL("MemProfiling"));
 
     // *NOTE:Mani - LLCurl::initClass is not thread safe. 
@@ -1665,7 +1677,7 @@ bool LLAppViewer::initLogging()
 	LLError::initForApplication(
 				gDirUtilp->getExpandedFilename(LL_PATH_APP_SETTINGS, ""));
 	LLError::setFatalFunction(errorCallback);
-	
+
 	// Remove the last ".old" log file.
 	std::string old_log_file = gDirUtilp->getExpandedFilename(LL_PATH_LOGS,
 							     "SecondLife.old");