libbb: introduce and use bb_getsockname()

function                                             old     new   delta
bb_getsockname                                         -      18     +18
xrtnl_open                                            88      83      -5
do_iplink                                           1216    1209      -7
arping_main                                         1686    1668     -18
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 0/3 up/down: 18/-30)            Total: -12 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 2 insertions, 3 deletions

diff --git a/networking/inetd.c b/networking/inetd.c
index 4dfa0089a..6843845fb 100644
--- a/networking/inetd.c
+++ b/networking/inetd.c
@@ -497,10 +497,9 @@ static void register_rpc(servtab_t *sep)
 {
         int n;
         struct sockaddr_in ir_sin;
-        socklen_t size;
 
-        size = sizeof(ir_sin);
-        if (getsockname(sep->se_fd, (struct sockaddr *) &ir_sin, &size) < 0) {
+        if (bb_getsockname(sep->se_fd, (struct sockaddr *) &ir_sin, sizeof(ir_sin)) < 0) {
+//TODO: verify that such failure is even possible in Linux kernel
                 bb_perror_msg("getsockname");
                 return;
         }