From ba3b9dbf065438402d89655d7baefb0ccc6f0663 Mon Sep 17 00:00:00 2001 From: Denys Vlasenko Date: Sun, 11 Feb 2018 14:55:46 +0100 Subject: 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 --- libbb/bb_getsockname.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) create mode 100644 libbb/bb_getsockname.c (limited to 'libbb/bb_getsockname.c') 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); +} -- cgit v1.2.3