ok ... config.user has more problems than I expected - removed at least for...

ok ... config.user has more problems than I expected - removed at least for now capability to select a uid - still checking if node has been launched with sudo and go down permission to original user id

debomatic-webui/index.js

@@ -41,20 +41,21 @@ if (config.routes.preferences)
   app.get(config.routes.preferences, routes.preferences)
 
 // Listening
-var server = app.listen(config.port, config.host, null, function(){
+var server = app.listen(config.port, config.host, null, function(err){
 
-  // set uid e gid - drop root privileges
-  try {
-    process.setgid(config.user);
-    process.setuid(config.user);
-  } catch (err) {
-    if (err.code == 'EPERM') {
-      console.error('Changing user id %s: permission denied. Running as %s.', config.user, process.getuid());
-    }
-    else {
-      console.error('Error changing user id.', err)
-      process.exit(1)
-    }
+  if (err) {
+    console.log(err)
+    return
+  }
+
+  // Checking nodejs with sudo:
+  // Find out which user used sudo through the environment variable
+  // and set his user id
+  var uid = parseInt(process.env.SUDO_UID);
+  if (uid) {
+    console.log("Please do not run nodejs with sudo. Changing user to %d", uid)
+    process.setgid(uid);
+    process.setuid(uid);
   }
 
   // statuses

debomatic-webui/lib/config.js

@@ -8,9 +8,13 @@
 // #start config-auto-export
 var config = {}
 
+/*
+ * Configure host and port.
+ *  Please for ports < 1000 use authbind. DO NOT RUN nodejs as root.
+ *  $ authbind nodejs index.js
+ */
 config.host = 'localhost'
 config.port = 3000
-config.user = 'www-data'  // who will run server [not fully tested yet]
 
 config.socket = {}
 config.socket.log = false
@@ -117,14 +121,15 @@ function _merge(object1, object2) {
 try {
   user_config = require('../user.config.js')
   console.log("Reading user configutation ...")
-  module.exports = _merge(config, user_config)
+  config = _merge(config, user_config)
 } catch (err) {
   if (err.code == 'MODULE_NOT_FOUND') {
     console.log("User configutation not found. Using global settings.")
-    module.exports = config
   }
   else {
-    console.error("Error reading user configutation", err)
+    console.error("Error reading user configutation", err);
     process.exit(1)
   }
-}
\ No newline at end of file
+} finally {
+  module.exports = config
+}