ip: detect rtnl_listen errors while monitoring netns

If rtnl_listen detects error (such as netlink socket EOF),
then exit with status 2 like other iproute2 monitor commands.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>

diff --git a/ip/ipnetns.c b/ip/ipnetns.c
index 0ae46a874a0c9d8914d4173a4c59a5010eae6aa6..594b2ef15d0cce0fc777881e8b3450c4dec6c29a 100644 (file)
--- a/ip/ipnetns.c
+++ b/ip/ipnetns.c
@@ -96,7 +96,8 @@ static int ipnetns_have_nsid(void)
                        close(fd);
                        return 0;
                }
-               rtnl_listen(&rth, ipnetns_accept_msg, NULL);
+               if (rtnl_listen(&rth, ipnetns_accept_msg, NULL) < 0)
+                       exit(2);
                close(fd);
        }