fix shutdown. sigint/sighup handlers.

example/index.js

@@ -12,10 +12,15 @@ bitcoind.start(function(err) {
   bitcoind.on('open', function(status) {
     setTimeout(function() {
       var genesis = '0x000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f';
-      return bitcoind.getBlock(genesis, function(err, block) {
-        if (err) return console.log(err.message);
-        print(block);
-      });
+      (function next(hash) {
+        return bitcoind.getBlock(hash, function(err, block) {
+          if (err) return console.log(err.message);
+          print(block);
+          if (process.argv[2] === '-r' && block.nextblockhash) {
+            setTimeout(next.bind(null, block.nextblockhash), 200);
+          }
+        });
+      })(genesis);
     }, 1000);
     console.log('bitcoind: status="%s"', status);
   });

lib/bitcoind.js

@@ -36,8 +36,29 @@ Bitcoin.prototype.start = function(callback) {
   var errorCaught = none;
 
   this.log_pipe = bitcoindjs.start(function(err, status) {
-    process.on('SIGINT', self.stop.bind(self));
-    process.on('SIGHUP', self.stop.bind(self));
+    process.on('SIGINT', function() {
+      if (process.listeners('SIGINT').length > 1) {
+        return;
+      }
+      if (!self._shutdown) {
+        process.exit(0);
+      } else {
+        self.stop();
+        exitCaught = 0;
+      }
+    });
+
+    process.on('SIGHUP', function() {
+      if (process.listeners('SIGHUP').length > 1) {
+        return;
+      }
+      if (!self._shutdown) {
+        process.exit(0);
+      } else {
+        self.stop();
+        exitCaught = 0;
+      }
+    });
 
     var exit = process.exit;
     self._exit = function() {
@@ -94,7 +115,7 @@ Bitcoin.prototype.start = function(callback) {
       delete self._shutdown;
 
       if (exitCaught !== none) {
-        return self._exit(0);
+        return self._exit(exitCaught);
       }
 
       if (errorCaught !== none) {