introduce and use xdup2(int, int)

stop checking whether setsockopt_reuseaddr(int fd) was successful (it always is)
remove second parameter (sockllen) from xmalloc_sockaddr2xxxxx functions

sockaddr2str                                         142     156     +14
collect_blk                                          467     474      +7
xdup2                                                 28      33      +5
singlemount                                         4456    4454      -2
print_host                                           214     212      -2
nslookup_main                                        139     137      -2
ftpgetput_main                                       414     412      -2
udhcpd_main                                         1258    1255      -3
udhcpc_main                                         2405    2402      -3
traceroute_main                                     4125    4122      -3
nc_main                                             1072    1069      -3
buffer_fill_and_print                                 76      73      -3
xmalloc_sockaddr2hostonly_noport                      18      14      -4
xmalloc_sockaddr2host_noport                          18      14      -4
xmalloc_sockaddr2host                                 15      11      -4
xmalloc_sockaddr2dotted_noport                        18      14      -4
xmalloc_sockaddr2dotted                               18      14      -4
wget_main                                           2618    2614      -4
ping_main                                            393     389      -4
ip_port_str                                          120     115      -5
dhcprelay_main                                      1146    1141      -5
dnsd_main                                           1531    1525      -6
passwd_main                                         1110    1102      -8
udhcp_kernel_packet                                  206     197      -9
udhcp_listen_socket                                  154     144     -10
getty_main                                          2576    2566     -10
setup                                                655     640     -15
xmove_fd                                              51      34     -17
dolisten                                             759     742     -17
tcpudpsvd_main                                      1866    1836     -30
startservice                                         339     299     -40

1 files changed, 7 insertions, 7 deletions

diff --git a/include/libbb.h b/include/libbb.h
index 52bc33940..651c48ba1 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -241,6 +241,7 @@ extern char *bb_get_last_path_component(char *path);
 
 int ndelay_on(int fd);
 int ndelay_off(int fd);
+void xdup2(int, int);
 void xmove_fd(int, int);
 
 
@@ -288,8 +289,7 @@ ssize_t xsendto(int s, const void *buf, size_t len, const struct sockaddr *to,
  * time out. Linux does not allow multiple live binds on same ip:port
  * regardless of SO_REUSEADDR (unlike some other flavors of Unix).
  * Turn it on before you call bind(). */
-//TODO: it seems like in Linux this never fails. Change to void, eliminate error checks
-int setsockopt_reuseaddr(int fd);
+void setsockopt_reuseaddr(int fd); /* On Linux this never fails. */
 int setsockopt_broadcast(int fd);
 /* NB: returns port in host byte order */
 unsigned bb_lookup_port(const char *port, const char *protocol, unsigned default_port);
@@ -360,14 +360,14 @@ void set_nport(len_and_sockaddr *lsa, unsigned port);
 /* Retrieve sin[6]_port or return -1 for non-INET[6] lsa's */
 int get_nport(const struct sockaddr *sa);
 /* Reverse DNS. Returns NULL on failure. */
-char* xmalloc_sockaddr2host(const struct sockaddr *sa, socklen_t salen);
+char* xmalloc_sockaddr2host(const struct sockaddr *sa);
 /* This one doesn't append :PORTNUM */
-char* xmalloc_sockaddr2host_noport(const struct sockaddr *sa, socklen_t salen);
+char* xmalloc_sockaddr2host_noport(const struct sockaddr *sa);
 /* This one also doesn't fall back to dotted IP (returns NULL) */
-char* xmalloc_sockaddr2hostonly_noport(const struct sockaddr *sa, socklen_t salen);
+char* xmalloc_sockaddr2hostonly_noport(const struct sockaddr *sa);
 /* inet_[ap]ton on steroids */
-char* xmalloc_sockaddr2dotted(const struct sockaddr *sa, socklen_t salen);
-char* xmalloc_sockaddr2dotted_noport(const struct sockaddr *sa, socklen_t salen);
+char* xmalloc_sockaddr2dotted(const struct sockaddr *sa);
+char* xmalloc_sockaddr2dotted_noport(const struct sockaddr *sa);
 // "old" (ipv4 only) API
 // users: traceroute.c hostname.c - use _list_ of all IPs
 struct hostent *xgethostbyname(const char *name);