Instead of using the NO_SIGNALS environment variable, use SUPPORTS_SIGNALS

lib/shutdown.js

@@ -75,7 +75,7 @@ exports.handleTerminationSignals = function(app, callback) {
     };
   }
 
-  if (!process.env.NO_SIGNALS) {
+  if (process.env.SUPPORTS_SIGNALS) {
     process.on('SIGINT', endIt('INT')).on('SIGTERM', endIt('TERM')).on('SIGQUIT', endIt('QUIT'));
   }
 };

scripts/run_locally.js

@@ -79,17 +79,17 @@ if (config.get('env').substr(0,5) === 'test_') {
 }
 
 // Windows can't use signals, so lets figure out if we should use them
-// To force signals, NO_SIGNALS=true.
+// To force signals, set the environment variable SUPPORTS_SIGNALS=true.
 // Otherwise, they will be feature-detected.
-var SIGNALS_PROP = 'NO_SIGNALS';
-if (!(SINGALS_PROP in process.env)) {
+var SIGNALS_PROP = 'SUPPORTS_SIGNALS';
+if (!(SIGNALS_PROP in process.env)) {
   try {
     function signals_test() {}
     process.on('SIGINT', signals_test);
     process.removeListener('SIGINT', signals_test);
-    process.env[SIGNALS_PROP] = false;
-  } catch (noSignals) {
     process.env[SIGNALS_PROP] = true;
+  } catch (noSignals) {
+    process.env[SIGNALS_PROP] = false;
   }
 }
 
@@ -150,7 +150,7 @@ daemonNames.forEach(function(dn) {
   });
 });
 
-if (!process.env[SIGNALS_PROP]) {
+if (process.env[SIGNALS_PROP]) {
   process.on('SIGINT', function () {
     console.log('\nSIGINT recieved! trying to shut down gracefully...');
     Object.keys(daemons).forEach(function (k) { daemons[k].kill('SIGINT'); });