From f88deb928a0f7dc02f427473f8c29e8f2bed14a3 Mon Sep 17 00:00:00 2001
From: Vaxry <vaxry@vaxry.net>
Date: Wed, 17 Dec 2025 19:26:10 +0000
Subject: [PATCH] compositor: warn on start via a log about start-hyprland

---
 src/Compositor.cpp | 3 ++-
 src/Compositor.hpp | 2 +-
 src/main.cpp       | 8 +++++++-
 3 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/src/Compositor.cpp b/src/Compositor.cpp
index 00e5a2d86..f4e92ee9b 100644
--- a/src/Compositor.cpp
+++ b/src/Compositor.cpp
@@ -142,8 +142,9 @@ static void aqLog(Aquamarine::eBackendLogLevel level, std::string msg) {
     Debug::log(aqLevelToHl(level), "[AQ] {}", msg);
 }
 
-void CCompositor::setWatchdogFd(int fd) {
+bool CCompositor::setWatchdogFd(int fd) {
     m_watchdogWriteFd = Hyprutils::OS::CFileDescriptor{fd};
+    return m_watchdogWriteFd.isValid() && !m_watchdogWriteFd.isClosed();
 }
 
 void CCompositor::bumpNofile() {
diff --git a/src/Compositor.hpp b/src/Compositor.hpp
index ca65a12d1..7671d8f0e 100644
--- a/src/Compositor.hpp
+++ b/src/Compositor.hpp
@@ -67,7 +67,7 @@ class CCompositor {
     void                                         cleanup();
     void                                         bumpNofile();
     void                                         restoreNofile();
-    void                                         setWatchdogFd(int fd);
+    bool                                         setWatchdogFd(int fd);
 
     bool                                         m_readyToProcess = false;
     bool                                         m_sessionActive  = true;
diff --git a/src/main.cpp b/src/main.cpp
index ed436934e..49d44a09a 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -211,10 +211,16 @@ int main(int argc, char** argv) {
 
     reapZombieChildrenAutomatically();
 
+    bool watchdogOk = watchdogFd > 0;
+
     if (watchdogFd > 0)
-        g_pCompositor->setWatchdogFd(watchdogFd);
+        watchdogOk = g_pCompositor->setWatchdogFd(watchdogFd);
     if (safeMode)
         g_pCompositor->m_safeMode = true;
+
+    if (!watchdogOk)
+        Debug::log(WARN, "WARNING: Hyprland is being launched without start-hyprland. This is highly advised against.");
+
     g_pCompositor->initServer(socketName, socketFd);
 
     if (verifyConfig)