From ab80450b66469a582b4df63491a8163c931e124c Mon Sep 17 00:00:00 2001
From: Sergey Krashevich <svk@svk.su>
Date: Fri, 13 Feb 2026 11:11:10 +0300
Subject: [PATCH] Expose process PID in API and UI

Include the process PID in the API info payload and surface it in the frontend. apiHandler now adds app.Info["pid"] = os.Getpid(); openapi.yaml documents the new pid property as an integer with an example; www/index.html is updated to show pid alongside version and config. This aids debugging and identifying the running process.
---
 internal/api/api.go      | 1 +
 website/api/openapi.yaml | 1 +
 www/index.html           | 7 ++++++-
 3 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/internal/api/api.go b/internal/api/api.go
index dfb65117..878bd6aa 100644
--- a/internal/api/api.go
+++ b/internal/api/api.go
@@ -238,6 +238,7 @@ var mu sync.Mutex
 func apiHandler(w http.ResponseWriter, r *http.Request) {
 	mu.Lock()
 	app.Info["host"] = r.Host
+	app.Info["pid"] = os.Getpid()
 	mu.Unlock()
 
 	ResponseJSON(w, app.Info)
diff --git a/website/api/openapi.yaml b/website/api/openapi.yaml
index b6110572..16611230 100644
--- a/website/api/openapi.yaml
+++ b/website/api/openapi.yaml
@@ -123,6 +123,7 @@ paths:
                 properties:
                   config_path: { type: string, example: "/config/go2rtc.yaml" }
                   host: { type: string, example: "192.168.1.123:1984" }
+                  pid: { type: integer, example: 12345 }
                   rtsp:
                     type: object
                     properties:
diff --git a/www/index.html b/www/index.html
index 69126e6f..34ad2c9d 100644
--- a/www/index.html
+++ b/www/index.html
@@ -147,7 +147,12 @@
     const url = new URL('api', location.href);
     fetch(url, {cache: 'no-cache'}).then(r => r.json()).then(data => {
         const info = document.querySelector('.info');
-        info.innerText = `version: ${data.version} / config: ${data.config_path}`;
+        const parts = [
+            `version: ${data.version}`,
+            `pid: ${data.pid}`,
+            `config: ${data.config_path}`,
+        ];
+        info.innerText = parts.join(' / ');
     });
 
     reload();