From d990f65805dca69bdfd725457569209c7c64fb07 Mon Sep 17 00:00:00 2001
From: Max Lv <max.c.lv@gmail.com>
Date: Wed, 14 Oct 2026 16:26:54 +0800
Subject: [PATCH] Reinitialize the event loop after daemonize()

The loop is created before the programs fork into the background, and
kqueue/epoll descriptors do not survive fork(), so ss-server -f (which
ss-manager always uses) died as soon as it ran. Call uv_loop_fork() in
the child.
---
 src/event/program.hpp | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/event/program.hpp b/src/event/program.hpp
index 1701b2e2..c253ef3c 100644
--- a/src/event/program.hpp
+++ b/src/event/program.hpp
@@ -29,6 +29,18 @@ public:
     Status init() noexcept { return loop_.init(); }
     Loop &loop() noexcept { return loop_; }
 
+    // In the child after daemonize(): kqueue and epoll descriptors do not
+    // survive fork().
+    Status after_fork() noexcept
+    {
+#ifndef _WIN32
+        if (uv_loop_fork(loop_.native()) != 0) {
+            return fail(Errc::io);
+        }
+#endif
+        return {};
+    }
+
     // SIGINT and SIGTERM end the run (and SIGUSR1 with `usr1`). With
     // `plugin_alive`, SIGCHLD ends it with exit code -1 once that reports
     // the plugin gone. Signals libuv cannot watch on this platform are