? sbin/dhcpcd/.gdbinit
Index: dist/if-bsd.c
===================================================================
RCS file: /cvsroot/src/external/bsd/dhcpcd/dist/if-bsd.c,v
retrieving revision 1.6
diff -u -p -r1.6 if-bsd.c
--- dist/if-bsd.c	14 Jun 2014 20:55:37 -0000	1.6
+++ dist/if-bsd.c	1 Jul 2014 13:24:58 -0000
@@ -779,6 +779,7 @@ if_managelink(struct dhcpcd_ctx *ctx)
 #endif
 
 	bytes = read(ctx->link_fd, msg, sizeof(msg));
+syslog(LOG_INFO, "%s: read %d bytes\n", __func__, (int)bytes);
 	if (bytes == -1)
 		return -1;
 	if (bytes == 0)
@@ -786,19 +787,23 @@ if_managelink(struct dhcpcd_ctx *ctx)
 	e = msg + bytes;
 	for (p = msg; p < e; p += rtm->rtm_msglen) {
 		rtm = (struct rt_msghdr *)(void *)p;
+syslog(LOG_INFO, "%s: rtm pid %d type %d", __func__, rtm->rtm_pid, rtm->rtm_type);
 		// Ignore messages generated by us
-		if (rtm->rtm_pid == getpid())
+		if (rtm->rtm_pid == getpid()) {syslog(LOG_INFO, "skipped %d", rtm->rtm_msglen);
 			break;
+		}
 		switch(rtm->rtm_type) {
 #ifdef RTM_IFANNOUNCE
 		case RTM_IFANNOUNCE:
 			ifan = (struct if_announcemsghdr *)(void *)p;
 			switch(ifan->ifan_what) {
 			case IFAN_ARRIVAL:
+syslog(LOG_INFO, "%s: IFAN_ARRIVAL", __func__);
 				dhcpcd_handleinterface(ctx, 1,
 				    ifan->ifan_name);
 				break;
 			case IFAN_DEPARTURE:
+syslog(LOG_INFO, "%s: IFAN_DEPARTURE", __func__);
 				dhcpcd_handleinterface(ctx, -1,
 				    ifan->ifan_name);
 				break;
@@ -808,16 +813,22 @@ if_managelink(struct dhcpcd_ctx *ctx)
 		case RTM_IFINFO:
 			ifm = (struct if_msghdr *)(void *)p;
 			memset(ifname, 0, sizeof(ifname));
+
 			if (!(if_indextoname(ifm->ifm_index, ifname)))
 				break;
+
 			switch (ifm->ifm_data.ifi_link_state) {
 			case LINK_STATE_DOWN:
+syslog(LOG_INFO, "%s: LINK_STATE_DOWN", __func__);
 				len = LINK_DOWN;
 				break;
 			case LINK_STATE_UP:
+syslog(LOG_INFO, "%s: LINK_STATE_UP", __func__);
 				len = LINK_UP;
 				break;
 			default:
+syslog(LOG_INFO, "%s: RTM_IFINFO default", __func__);
+syslog(LOG_INFO, "%s: ifm->ifm_flags %x", __func__, ifm->ifm_flags);
 				/* handle_carrier will re-load
 				 * the interface flags and check for
 				 * IFF_RUNNING as some drivers that
@@ -839,6 +850,7 @@ if_managelink(struct dhcpcd_ctx *ctx)
 			sa = (struct sockaddr *)(void *)cp;
 			if (sa->sa_family != AF_INET)
 				break;
+syslog(LOG_INFO, "%s: RTM_DELETE", __func__);
 #ifdef INET
 			get_addrs(rtm->rtm_addrs, cp, rti_info);
 			memset(&rt, 0, sizeof(rt));