From 0e098b15c76e222f7de381203c0c35a75a5b2f24 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Thu, 7 Oct 2010 02:34:17 +0200
Subject: util: never use sizeof(sa_family_t) when calculating sockaddr sizes

---
 src/systemctl.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'src/systemctl.c')

diff --git a/src/systemctl.c b/src/systemctl.c
index 45249aaa3b..918dcbe8b5 100644
--- a/src/systemctl.c
+++ b/src/systemctl.c
@@ -31,6 +31,7 @@
 #include <fcntl.h>
 #include <sys/socket.h>
 #include <sys/stat.h>
+#include <stddef.h>
 
 #include <dbus/dbus.h>
 
@@ -4875,7 +4876,7 @@ static int send_shutdownd(usec_t t, char mode, bool warn, const char *message) {
 
         zero(msghdr);
         msghdr.msg_name = &sockaddr;
-        msghdr.msg_namelen = sizeof(sa_family_t) + 1 + sizeof("/org/freedesktop/systemd1/shutdownd") - 1;
+        msghdr.msg_namelen = offsetof(struct sockaddr_un, sun_path) + 1 + sizeof("/org/freedesktop/systemd1/shutdownd") - 1;
 
         msghdr.msg_iov = &iovec;
         msghdr.msg_iovlen = 1;
-- 
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