Patch from Shaun Jackman:

Replace uptime with time(NULL). time is more portable than uptime and
eliminates the need to define uptime, reducing code size slightly.

networking/udhcp/arpping.c

@@ -79,7 +79,7 @@ int arpping(uint32_t yiaddr, uint32_t ip, uint8_t *mac, char *interface)
 
 	/* wait arp reply, and check it */
 	tm.tv_usec = 0;
-	prevTime = uptime();
+	prevTime = time(NULL);
 	while (timeout > 0) {
 		FD_ZERO(&fdset);
 		FD_SET(s, &fdset);
@@ -97,8 +97,8 @@ int arpping(uint32_t yiaddr, uint32_t ip, uint8_t *mac, char *interface)
 				break;
 			}
 		}
-		timeout -= uptime() - prevTime;
-		prevTime = uptime();
+		timeout -= time(NULL) - prevTime;
+		prevTime = time(NULL);
 	}
 	close(s);
 	DEBUG(LOG_INFO, "%salid arp replies for this address", rv ? "No v" : "V");	

networking/udhcp/common.c

@@ -37,14 +37,6 @@
 
 static int daemonized;
 
-long uptime(void)
-{
-	struct sysinfo info;
-	sysinfo(&info);
-	return info.uptime;
-}
-
-
 /*
  * This function makes sure our first socket calls
  * aren't going to fd 1 (printf badness...) and are

networking/udhcp/common.h

@@ -39,7 +39,6 @@ enum syslog_levels {
 #include <syslog.h>
 #endif
 
-long uptime(void);
 void background(const char *pidfile);
 void start_log_and_pid(const char *client_server, const char *pidfile);
 void background(const char *pidfile);

networking/udhcp/dhcpc.c

@@ -310,7 +310,7 @@ int main(int argc, char *argv[])
 
 	for (;;) {
 
-		tv.tv_sec = timeout - uptime();
+		tv.tv_sec = timeout - time(NULL);
 		tv.tv_usec = 0;
 
 		if (listen_mode != LISTEN_NONE && fd < 0) {
@@ -330,7 +330,7 @@ int main(int argc, char *argv[])
 			retval = select(max_fd + 1, &rfds, NULL, NULL, &tv);
 		} else retval = 0; /* If we already timed out, fall through */
 
-		now = uptime();
+		now = time(NULL);
 		if (retval == 0) {
 			/* timeout dropped to zero */
 			switch (state) {