patch monado to respect terminate signals

Although it doesn't terminate properly with this it seems to make
`systemctl --user restart monado` work

0001-ipc-shutdown-ipc-server-on-SIGTERM.patch

@@ -0,0 +1,68 @@
+From 8d75be68315bec605a95b50edf7d2a6c56772b7f Mon Sep 17 00:00:00 2001
+From: Sapphire <imsapphire0@gmail.com>
+Date: Tue, 25 Nov 2025 23:20:46 -0600
+Subject: [PATCH] ipc: shutdown ipc server on SIGTERM
+
+---
+ src/xrt/ipc/server/ipc_server_process.c | 24 ++++++++++++++++++++++++
+ 1 file changed, 24 insertions(+)
+
+diff --git a/src/xrt/ipc/server/ipc_server_process.c b/src/xrt/ipc/server/ipc_server_process.c
+index 92c232904..47a4a70bc 100644
+--- a/src/xrt/ipc/server/ipc_server_process.c
++++ b/src/xrt/ipc/server/ipc_server_process.c
+@@ -50,6 +50,10 @@
+ #include <timeapi.h>
+ #endif
+ 
++#if defined(XRT_OS_UNIX)
++#include <signal.h>
++#endif
++
+ 
+ /*
+  *
+@@ -1062,6 +1066,16 @@ ipc_server_get_system_properties(struct ipc_server *vs, struct xrt_system_proper
+ 	return XRT_SUCCESS;
+ }
+ 
++#ifdef XRT_OS_UNIX
++struct ipc_server *g_server;
++static void handle_signal(int signal)
++{
++	if (g_server && signal == SIGTERM) {
++		ipc_server_handle_shutdown_signal(g_server);
++	}
++}
++#endif
++
+ int
+ ipc_server_main_common(const struct ipc_server_main_info *ismi,
+                        const struct ipc_server_callbacks *callbacks,
+@@ -1086,6 +1100,11 @@ ipc_server_main_common(const struct ipc_server_main_info *ismi,
+ 	timeBeginPeriod(1);
+ #endif
+ 
++#ifdef XRT_OS_UNIX
++	g_server = s;
++	signal(SIGTERM, handle_signal);
++#endif
++
+ 	/*
+ 	 * Need to create early before any vars are added. Not created in
+ 	 * init_all since that function is shared with Android and the debug
+@@ -1127,6 +1146,11 @@ ipc_server_main_common(const struct ipc_server_main_info *ismi,
+ 	// Stop the UI before tearing everything down.
+ 	u_debug_gui_stop(&s->debug_gui);
+ 
++#ifdef XRT_OS_UNIX
++	signal(SIGTERM, NULL);
++	g_server = NULL;
++#endif
++
+ 	// Done after UI stopped.
+ 	teardown_all(s);
+ 	free(s);
+-- 
+2.52.0
+

vr-overlay.nix

@@ -25,7 +25,9 @@
           rev = "2ebbca83e896e0802185277ce0a0a463db7a7892";
           hash = "sha256-JjlKHXd1SD9M8OpgFERZCvAhM0eMxjME96YU38DlKNw=";
         };
-        patches = [];
+        patches = [
+          ./0001-ipc-shutdown-ipc-server-on-SIGTERM.patch
+        ];
       });
     })
   ];