This seems sufficient for ifup and ifdown to actually work

as advertised.  Works for me (at least with glibc)

2 files changed, 4 insertions, 0 deletions

diff --git a/networking/libiproute/ip_parse_common_args.c b/networking/libiproute/ip_parse_common_args.c
index ac9d94916..4b4355ac1 100644
--- a/networking/libiproute/ip_parse_common_args.c
+++ b/networking/libiproute/ip_parse_common_args.c
@@ -47,6 +47,8 @@ void ip_parse_common_args(int *argcp, char ***argvp)
                 if (matches(opt, "-family") == 0) {
                         argc--;
                         argv++;
+                        if (! argv[1]) 
+                            show_usage();
                         if (strcmp(argv[1], "inet") == 0)
                                 preferred_family = AF_INET;
                         else if (strcmp(argv[1], "inet6") == 0)
diff --git a/networking/libiproute/ipaddress.c b/networking/libiproute/ipaddress.c
index 88438179d..8eba90c77 100644
--- a/networking/libiproute/ipaddress.c
+++ b/networking/libiproute/ipaddress.c
@@ -524,8 +524,10 @@ extern int ipaddr_list_or_flush(int argc, char **argv, int flush)
                                 exit(1);
                         }
                         if (filter.flushed == 0) {
+#if 0
                                 if (round == 0)
                                         fprintf(stderr, "Nothing to flush.\n");
+#endif
                                 fflush(stdout);
                                 return 0;
                         }