From 6687d499415151bd62489fed5331f414576ec354 Mon Sep 17 00:00:00 2001
From: Unitech <strzelewicz.alexandre@gmail.com>
Date: Fri, 2 Feb 2018 15:32:54 +0100
Subject: [PATCH] feat: pm2 pid <app_name> command

---
 bin/pm2          |  6 ++++++
 lib/API/Extra.js | 28 ++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+)

diff --git a/bin/pm2 b/bin/pm2
index d8f8db781..81dca3a95 100755
--- a/bin/pm2
+++ b/bin/pm2
@@ -310,6 +310,12 @@ commander.command('startOrReload <json>')
     pm2._startJson(file, commander, 'reloadProcessId');
   });
 
+commander.command('pid [app_name]')
+  .description('return pid of [app_name] or all')
+  .action(function(app) {
+    pm2.getPID(app);
+  });
+
 commander.command('startOrGracefulReload <json>')
   .description('start or gracefully reload JSON file')
   .action(function(file) {
diff --git a/lib/API/Extra.js b/lib/API/Extra.js
index 0c017ab6e..00f445dde 100644
--- a/lib/API/Extra.js
+++ b/lib/API/Extra.js
@@ -117,6 +117,34 @@ module.exports = function(CLI) {
     });
   };
 
+  CLI.prototype.getPID = function(app_name, cb) {
+    var that = this;
+
+    if (typeof(app_name) === 'function') {
+      cb = app_name;
+      app_name = null;
+    }
+
+    this.Client.executeRemote('getMonitorData', {}, function(err, list) {
+      if (err) {
+        Common.printError(cst.PREFIX_MSG_ERR + err);
+        return cb ? cb(Common.retErr(err)) : that.exitCli(cst.ERROR_EXIT);
+      }
+
+      var pids = [];
+
+      list.forEach(function(app) {
+        if (!app_name || app_name == app.name)
+          pids.push(app.pid);
+      })
+
+      if (!cb) {
+        Common.printOut(pids.join("\n"))
+        return that.exitCli(cst.SUCCESS_EXIT);
+      }
+      return cb(null, pids);
+    })
+  }
   /**
    * Create PM2 memory snapshot
    * @method getVersion