udhcp: many small fixes:

* arpping(): smaller and even probably fixed
* lots of variables/params converted: ulong -> uint32_t
* uptime() nuked in favor of monotonic_sec()
* udhcp_get_packet(): only one "bad vendor", simplify

function                                             old     new   delta
reservedIp                                            36      35      -1
udhcpc_main                                         2462    2460      -2
addStaticLease                                        64      62      -2
static.broken_vendors                                 16       -     -16
uptime                                                19       -     -19
udhcpd_main                                         1273    1238     -35
udhcp_get_packet                                     223     184     -39
.rodata                                           144162  144106     -56
arpping                                              690     609     -81
------------------------------------------------------------------------------
(add/remove: 0/2 grow/shrink: 0/7 up/down: 0/-251)           Total: -251 bytes
   text    data     bss     dec     hex filename
 734241    3028   14400  751669   b7835 busybox_old
 734005    3028   14400  751433   b7749 busybox_unstripped

1 files changed, 2 insertions, 22 deletions

diff --git a/networking/udhcp/common.c b/networking/udhcp/common.c
index 76f8bf703..108ab2e95 100644
--- a/networking/udhcp/common.c
+++ b/networking/udhcp/common.c
@@ -10,31 +10,10 @@
  * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
  */
 
-#include <syslog.h>
-
 #include "common.h"
 
-
 const uint8_t MAC_BCAST_ADDR[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 
-long uptime(void)
-{
-        struct sysinfo info;
-        sysinfo(&info);
-        return info.uptime;
-}
-
-static void create_pidfile(const char *pidfile)
-{
-        if (!pidfile)
-                return;
-
-        if (!write_pidfile(pidfile)) {
-                bb_perror_msg("cannot create pidfile %s", pidfile);
-                return;
-        }
-}
-
 void udhcp_make_pidfile(const char *pidfile)
 {
         /* Make sure fd 0,1,2 are open */
@@ -44,7 +23,8 @@ void udhcp_make_pidfile(const char *pidfile)
         setlinebuf(stdout);
 
         /* Create pidfile */
-        create_pidfile(pidfile);
+        if (pidfile && !write_pidfile(pidfile))
+                bb_perror_msg("cannot create pidfile %s", pidfile);
 
         bb_info_msg("%s (v%s) started", applet_name, BB_VER);
 }