versions() added docker, postfix

CHANGELOG.md

@@ -100,6 +100,7 @@ Other changes
 
 | Version        | Date           | Comment  |
 | -------------- | -------------- | -------- |
+| 3.47.0         | 2018-11-06     | `versions()` added docker, postfix |
 | 3.46.0         | 2018-11-05     | fixed issue `versions()`, added system openssl version |
 | 3.45.10        | 2018-11-03     | fixed issue `battery()`, modified `package.json` - files |
 | 3.45.9         | 2018-10-22     | fixed node 4 incompatibility |

README.md

@@ -59,13 +59,13 @@ async function cpu() {
 
 (last 7 major and minor version releases)
 
-- Version 3.46.0: `version()` added system openssl version (besides the one insode node.js)
+- Version 3.47.0: `version()` added docker, postfix)
+- Version 3.46.0: `version()` added system openssl version (besides the one inside node.js)
 - Version 3.45.0: `diskLayout()` added S.M.A.R.T. status
 - Version 3.44.0: `battery()` added type, model, manufacturer, serial, timeremaining
 - Version 3.43.0: added speed per CPU core `cpuCurrentspeed()`
 - Version 3.42.0: added parent process PID `processes()`
 - Version 3.41.0: first partial `SunOS` support
-- Version 3.40.0: extended `versions()` (php, redis, mongodb)
 - ...
 
 You can find all changes here: [detailed changelog][changelog-url]

lib/osinfo.js

@@ -291,11 +291,13 @@ function versions(callback) {
         redis: '',
         mongodb: '',
         nginx: '',
-        php: ''
+        php: '',
+        docker: '',
+        postfix: ''
       };
 
       let functionProcessed = (function () {
-        let totalFunctions = 14;
+        let totalFunctions = 16;
         return function () {
           if (--totalFunctions === 0) {
             if (callback) {
@@ -425,6 +427,21 @@ function versions(callback) {
           }
           functionProcessed();
         });
+        exec('docker --version', function (error, stdout) {
+          if (!error) {
+            const docker = stdout.toString().split('\n')[0] || '';
+            const parts = docker.split(' ');
+            result.docker = parts.length > 2 && parts[2].endsWith(',') ? parts[2].slice(0, -1) : '';
+          }
+          functionProcessed();
+        });
+        exec('postconf -d | grep mail_version', function (error, stdout) {
+          if (!error) {
+            const postfix = stdout.toString().split('\n') || [];
+            result.postfix = util.getValue(postfix, 'mail_version', '=', true);
+          }
+          functionProcessed();
+        });
         exec('mongod --version', function (error, stdout) {
           if (!error) {
             result.mongodb = stdout.toString().split('\n')[0] || '';