Merge pull request #3699 from new-sashok724/unix-sockets

Support listening on the unix socket

src/services/port.js

@@ -6,7 +6,7 @@ const dataDir = require('./data_dir');
 function parseAndValidate(portStr, source) {
     const portNum = parseInt(portStr);
 
-    if (!portNum || portNum < 0 || portNum >= 65536) {
+    if (!portNum && portNum !== 0 || portNum < 0 || portNum >= 65536) {
         console.log(`FATAL ERROR: Invalid port value "${portStr}" from ${source}, should be a number between 0 and 65536.`);
         process.exit(-1);
     }

src/www

@@ -100,9 +100,14 @@ async function startTrilium() {
      */
 
     httpServer.keepAliveTimeout = 120000 * 5;
-    httpServer.listen(port, host);
+    const listenTcp = port !== 0;
+    if (listenTcp) {
+      httpServer.listen(port, host); // TCP socket.
+    } else {
+      httpServer.listen(host); // Unix socket.
+    }
     httpServer.on('error', error => {
-            if (error.syscall !== 'listen') {
+            if (!listenTcp || error.syscall !== 'listen') {
                 throw error;
             }
 
@@ -124,7 +129,13 @@ async function startTrilium() {
         }
     )
 
-    httpServer.on('listening', () => log.info(`Listening on port ${httpServer.address().port}`));
+    httpServer.on('listening', () => {
+        if (listenTcp) {
+            log.info(`Listening on port ${port}`)
+        } else {
+            log.info(`Listening on unix socket ${host}`)
+        }
+    });
 
     ws.init(httpServer, sessionParser);