From 6b48cd4b57211fbb75e91cb80771c6e0aa4b8e9f Mon Sep 17 00:00:00 2001
From: Simon Rettberg
Date: Mon, 21 Oct 2019 15:05:53 +0200
Subject: Guess proper dbus socket

---
 src/warn.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/src/warn.c b/src/warn.c
index c02829e..b3f6460 100644
--- a/src/warn.c
+++ b/src/warn.c
@@ -2,6 +2,10 @@
 #include "util.h"
 #include <stdio.h>
 #include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <pwd.h>
 
 struct action {
 	const char *message;
@@ -66,7 +70,20 @@ void warn_showCustomWarning( const struct user *usr, const char *title, const ch
 	if ( *usr->display ) {
 		// notify-send
 		if ( doublefork() ) {
+			char buf[300];
+			uid_t uid;
+			struct passwd *u = getpwnam( usr->user );
+			struct stat tmp;
+			if ( u == NULL ) {
+				uid = geteuid();
+			} else {
+				uid = u->pw_uid;
+			}
 			switchUserSafe( usr->user );
+			snprintf( buf, sizeof(buf), "unix:path=/run/user/%u/bus", (unsigned int)uid );
+			if ( stat( buf + 10, &tmp ) == 0 ) {
+				setenv( "DBUS_SESSION_BUS_ADDRESS", buf, 1 );
+			}
 			setenv( "DISPLAY", usr->display, 1 );
 			if ( usr->xauth[0] != '\0' && usr->xauth[0] != '-' ) {
 				setenv( "XAUTHORITY", usr->xauth, 1 );
-- 
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