From 760f409a4add18e1b6ca773c2ccab01162885b9f Mon Sep 17 00:00:00 2001
From: Tom Gundersen <teg@jklm.no>
Date: Tue, 3 Feb 2015 21:33:04 +0100
Subject: [PATCH] sd-rtnl: allow sd_rtnl_open_fd() to be used on bound sockets

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

diff --git a/src/libsystemd/sd-rtnl/sd-rtnl.c b/src/libsystemd/sd-rtnl/sd-rtnl.c
index 45ba50a85..ae49c77e0 100644
--- a/src/libsystemd/sd-rtnl/sd-rtnl.c
+++ b/src/libsystemd/sd-rtnl/sd-rtnl.c
@@ -146,7 +146,8 @@ static int rtnl_open_fd_ap(sd_rtnl **ret, int fd, unsigned n_groups, va_list ap)
         addrlen = sizeof(rtnl->sockaddr);
 
         r = bind(fd, &rtnl->sockaddr.sa, addrlen);
-        if (r < 0)
+        /* ignore EINVAL to allow opening an already bound socket */
+        if (r < 0 && errno != EINVAL)
                 return -errno;
 
         r = getsockname(fd, &rtnl->sockaddr.sa, &addrlen);
-- 
2.30.2