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authorDenys Vlasenko <vda.linux@googlemail.com>2018-02-11 14:55:46 +0100
committerDenys Vlasenko <vda.linux@googlemail.com>2018-02-11 14:55:46 +0100
commitba3b9dbf065438402d89655d7baefb0ccc6f0663 (patch)
tree4669edd0fb031940a794eaf8942bdbf314efea2e /libbb
parentd3162773d5c722cc1f5c5b1ea5171c8d3c208135 (diff)
downloadbusybox-ba3b9dbf065438402d89655d7baefb0ccc6f0663.tar.gz
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>
Diffstat (limited to 'libbb')
-rw-r--r--libbb/bb_getsockname.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/libbb/bb_getsockname.c b/libbb/bb_getsockname.c
new file mode 100644
index 000000000..1af9b39b9
--- /dev/null
+++ b/libbb/bb_getsockname.c
@@ -0,0 +1,19 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Utility routines.
+ *
+ * Licensed under GPLv2, see file LICENSE in this source tree.
+ */
+//kbuild:lib-y += bb_getsockname.o
+
+#include "libbb.h"
+
+int FAST_FUNC bb_getsockname(int sockfd, void *addr, socklen_t addrlen)
+{
+ /* The usefullness of this function is that for getsockname(),
+ * addrlen must go on stack (to _have_ an address to be passed),
+ * but many callers do not need its modified value.
+ * By using this shim, they can avoid unnecessary stack spillage.
+ */
+ return getsockname(sockfd, (struct sockaddr *)addr, &addrlen);
+}