From 0498e6a433e23cfc6e3b6397328019d5d6cd9973 Mon Sep 17 00:00:00 2001
From: Steven Xu <stevenxxiu@gmail.com>
Date: Mon, 17 May 2021 19:12:22 +1000
Subject: [PATCH] feat: make `gw_iface` work with `downspeedgraph` &
 `upspeedgraph`, e.g. `${downspeedgraph ${gw_iface}}`

---
 src/net_stat.cc | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/net_stat.cc b/src/net_stat.cc
index 9673ac7b..9e889f61 100644
--- a/src/net_stat.cc
+++ b/src/net_stat.cc
@@ -335,6 +335,14 @@ void parse_net_stat_graph_arg(struct text_object *obj, const char *arg,
 
   // default to DEFAULTNETDEV
   if (buf != nullptr) {
+#if defined(__linux__)
+    if (0 == (strcmp("$gw_iface", buf)) || 0 == (strcmp("${gw_iface}", buf))) {
+      update_gateway_info();
+      obj->data.opaque = get_net_stat(e_iface, obj, free_at_crash);
+      free(buf);
+      return;
+    }
+#endif
     obj->data.opaque = get_net_stat(buf, obj, free_at_crash);
     free(buf);
     return;