telnetd: fill hostname field in utmp/wtmp records

function                                             old     new   delta
get_lsa                                                -     109    +109
make_new_session                                     438     504     +66
get_peer_lsa                                           -      10     +10
ftpd_main                                           2340    2267     -73
get_sock_lsa                                         101      10     -91
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 1/2 up/down: 185/-164)           Total: 21 bytes

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

1 files changed, 13 insertions, 3 deletions

diff --git a/libbb/xconnect.c b/libbb/xconnect.c
index d8c8d02d5..c3ee633e4 100644
--- a/libbb/xconnect.c
+++ b/libbb/xconnect.c
@@ -47,25 +47,35 @@ int FAST_FUNC setsockopt_bindtodevice(int fd UNUSED_PARAM,
 }
 #endif
 
-len_and_sockaddr* FAST_FUNC get_sock_lsa(int fd)
+static len_and_sockaddr* get_lsa(int fd, int (*get_name)(int fd, struct sockaddr *addr, socklen_t *addrlen))
 {
         len_and_sockaddr lsa;
         len_and_sockaddr *lsa_ptr;
 
         lsa.len = LSA_SIZEOF_SA;
-        if (getsockname(fd, &lsa.u.sa, &lsa.len) != 0)
+        if (get_name(fd, &lsa.u.sa, &lsa.len) != 0)
                 return NULL;
 
         lsa_ptr = xzalloc(LSA_LEN_SIZE + lsa.len);
         if (lsa.len > LSA_SIZEOF_SA) { /* rarely (if ever) happens */
                 lsa_ptr->len = lsa.len;
-                getsockname(fd, &lsa_ptr->u.sa, &lsa_ptr->len);
+                get_name(fd, &lsa_ptr->u.sa, &lsa_ptr->len);
         } else {
                 memcpy(lsa_ptr, &lsa, LSA_LEN_SIZE + lsa.len);
         }
         return lsa_ptr;
 }
 
+len_and_sockaddr* FAST_FUNC get_sock_lsa(int fd)
+{
+        return get_lsa(fd, getsockname);
+}
+
+len_and_sockaddr* FAST_FUNC get_peer_lsa(int fd)
+{
+        return get_lsa(fd, getpeername);
+}
+
 void FAST_FUNC xconnect(int s, const struct sockaddr *s_addr, socklen_t addrlen)
 {
         if (connect(s, s_addr, addrlen) < 0) {