From da2c0b2200148ae5754f00ac2e7953b4b55eb88f Mon Sep 17 00:00:00 2001
From: nacho <nacho@ownyourbits.com>
Date: Wed, 19 Sep 2018 18:13:15 -0600
Subject: [PATCH] autodetect default interface

---
 qemu-pi.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/qemu-pi.sh b/qemu-pi.sh
index 729f8b0..fce07c9 100755
--- a/qemu-pi.sh
+++ b/qemu-pi.sh
@@ -28,7 +28,6 @@ IMG=$1
 KERNEL=kernel-qemu-4.4.34-jessie
 
 NO_NETWORK=1            # set to 1 to skip network configuration
-IFACE=enp3s0            # interface that we currently use for internet
 BRIDGE=br0              # name for the bridge we will create to share network with the raspbian img
 MAC='52:54:be:36:42:a9' # comment this line for random MAC (maybe annoying if on DHCP)
 BINARY_PATH=/usr/bin    # path prefix for binaries
@@ -38,6 +37,7 @@ NO_GRAPHIC=0            # set to 1 to start in no graphic mode
 type qemu-system-arm &>/dev/null || { echo "QEMU ARM not found"       ; exit 1; }
 test -f $IMG && test -f $KERNEL  || { echo "$IMG or $KERNEL not found"; exit 1; }
 
+IFACE="$( ip r | grep "default via" | awk '{ print $5 }' | head -1 )"
 [[ "$IFACE" == "" ]] || [[ "$BRIDGE" == "" ]] && NO_NETWORK=1
 
 # some more checks