commit 949dcccda1d14e3d064ea50212fa0af6f1198505
Author: Richard Kettlewell <rjk@greenend.org.uk>
Date:   Sat Jul 2 20:40:34 2011 +0100

    If 'route' fails, log its exit status.

diff --git a/tun.c b/tun.c
index 7d1053a..8728676 100644
--- a/tun.c
+++ b/tun.c
@@ -148,7 +148,7 @@ static bool_t tun_set_route(void *sst, struct netlink_client *routes)
     string_t network, mask, secnetaddr;
     struct subnet_list *nets;
     int32_t i;
-    int fd=-1;
+    int fd=-1, rv;
 
     if (routes->up == routes->kup) return False;
     if (st->route_type==TUN_CONFIG_IOCTL) {
@@ -174,17 +174,17 @@ static bool_t tun_set_route(void *sst, struct netlink_client *routes)
 		nets->list[i].len,routes->up?"to":"from");
 	switch (st->route_type) {
 	case TUN_CONFIG_LINUX:
-	    sys_cmd(st->route_path,"route",routes->up?"add":"del",
-		    "-net",network,"netmask",mask,
-		    "gw",secnetaddr,(char *)0);
+	    rv = sys_cmd(st->route_path,"route",routes->up?"add":"del",
+		         "-net",network,"netmask",mask,
+		         "gw",secnetaddr,(char *)0);
 	    break;
 	case TUN_CONFIG_BSD:
-	    sys_cmd(st->route_path,"route",routes->up?"add":"del",
-		    "-net",network,secnetaddr,mask,(char *)0);
+	    rv = sys_cmd(st->route_path,"route",routes->up?"add":"del",
+		         "-net",network,secnetaddr,mask,(char *)0);
 	    break;
 	case TUN_CONFIG_SOLARIS25:
-	    sys_cmd(st->route_path,"route",routes->up?"add":"del",
-		    network,secnetaddr,(char *)0);
+	    rv = sys_cmd(st->route_path,"route",routes->up?"add":"del",
+		         network,secnetaddr,(char *)0);
 	    break;
 	case TUN_CONFIG_IOCTL:
 	{
@@ -209,6 +209,7 @@ static bool_t tun_set_route(void *sst, struct netlink_client *routes)
 	    if (ioctl(fd,action,&rt)<0) {
 		fatal_perror("tun_set_route: ioctl()");
 	    }
+	    rv = 0;
 #else
 	    fatal("tun_set_route: ioctl method not supported");
 #endif
@@ -218,6 +219,8 @@ static bool_t tun_set_route(void *sst, struct netlink_client *routes)
 	    fatal("tun_set_route: unsupported route command type");
 	    break;
 	}
+	if(rv != 0)
+	    Message(M_ERR, "tun_set_route: route exited with status %#x\n", rv);
 	free(network); free(mask);
     }
     free(secnetaddr);