added port check to prevent komodod sigint

package.json

@@ -34,6 +34,7 @@
     "md5": "^2.2.1",
     "mkdirp": "^0.5.1",
     "pm2": "^2.3.0",
+    "portscanner": "^2.1.1",
     "ps-node": "^0.1.4",
     "request": "^2.80.0",
     "rimraf": "^2.6.1",

routes/ports.js

@@ -0,0 +1,52 @@
+const assetChainPorts = {
+  'komodod': '7771',
+  'SUPERNET': '11341',
+  'REVS': '10196',
+  'WLC': '11667',
+  'PANGEA': '10074',
+  'DEX': '9503',
+  'JUMBLR': '10789',
+  'BET': '11222',
+  'CRYPTO': '10420',
+  'HODL': '8010',
+  'SHARK': '14104',
+  'BOTS': '10151',
+  'MGW': '15524',
+  'MVP': '11676',
+  'KV': '9747',
+  'CEAL': '13097',
+  'MESH': '8400',
+  'USD': '13967',
+  'CHF': '15312',
+  'CAD': '8720',
+  'BRL': '9914',
+  'BGN': '9110',
+  'AUD': '8045',
+  'PLN': '13493',
+  'PHP': '11181',
+  'NZD': '10915',
+  'NOK': '11588',
+  'MYR': '10688',
+  'MXN': '13970',
+  'KRW': '14020',
+  'JPY': '13145',
+  'INR': '10536',
+  'ILS': '14638',
+  'IDR': '14459',
+  'HKD': '15409',
+  'HUF': '13699',
+  'GBP': '11505',
+  'EUR': '8065',
+  'DKK': '13830',
+  'CNY': '10384',
+  'ZAR': '15160',
+  'TRY': '13924',
+  'THB': '11847',
+  'SGD': '14475',
+  'SEK': '11447',
+  'RON': '8675',
+  'RUB': '8199',
+  'CZK': '9482'
+};
+
+module.exports = assetChainPorts;

routes/shepherd.js

@@ -15,7 +15,8 @@ const electron = require('electron'),
       pm2 = require('pm2'),
       request = require('request'),
       async = require('async'),
-      rimraf = require('rimraf');
+      rimraf = require('rimraf'),
+      portscanner = require('portscanner');
 
 Promise = require('bluebird');
 
@@ -23,6 +24,7 @@ const fixPath = require('fix-path');
 var ps = require('ps-node'),
     setconf = require('../private/setconf.js'),
     kmdcli = require('../private/kmdcli.js'),
+    assetChainPorts = require('./ports.js')
     shepherd = express.Router();
 
 // IGUANA FILES AND CONFIG SETTINGS
@@ -650,26 +652,35 @@ function herder(flock, data) {
       console.log('komodod debug.log access err: ' + e);
     }
 
+    // get komodod instance port
+    var _port = assetChainPorts[data.ac_name];
+
     try {
-      pm2.connect(true, function(err) { // start up pm2 god
+      // check if komodod instance is already running
-        if (err) {
+      portscanner.checkPortStatus(_port, '127.0.0.1', function(error, status) {
-          console.error(err);
+        // Status is 'open' if currently in use or 'closed' if available 
-          process.exit(2);
+        if (status === 'closed') {
-        }
+          pm2.connect(true, function(err) { // start up pm2 god
+            if (err) {
+              console.error(err);
+              process.exit(2);
+            }
 
-        data.ac_options.push('-reindex &');
+            pm2.start({
-
+              script: komododBin, // path to binary
-        pm2.start({
+              name: data.ac_name, // REVS, USD, EUR etc.
-          script: komododBin, // path to binary
+              exec_mode : 'fork',
-          name: data.ac_name, // REVS, USD, EUR etc.
+              cwd: komodoDir,
-          exec_mode : 'fork',
+              args: data.ac_options
-          cwd: komodoDir,
+            }, function(err, apps) {
-          args: data.ac_options
+              pm2.disconnect();   // Disconnect from PM2
-        }, function(err, apps) {
+                if (err)
-          pm2.disconnect();   // Disconnect from PM2
+                  throw err;
-            if (err)
+            });
-              throw err;
+          });          
-        });
+        } else {
+          console.log('port ' + _port + ' (' + data.ac_name + ') is already in use');
+        }
       });
     } catch(e) {
       console.log('failed to start komodod err: ' + e);