From 280a9b13d28b9f581259ba3aa8affb2f049f05a0 Mon Sep 17 00:00:00 2001
From: Toni Uhlig <matzeton@googlemail.com>
Date: Wed, 5 Sep 2018 19:39:12 +0200
Subject: - Makefile should not create symlinks if they exist already - uid/gid
 set to 0/0 in CPIO archive - provide the debian qemu-ifup script (used if
 /etc/qemu-ifup does not exist) - image-reinstall deletes the initramfs but
 leaves all other targets intact

Signed-off-by: Toni Uhlig <matzeton@googlemail.com>
---
 scripts/qemu-ifup | 43 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100755 scripts/qemu-ifup

(limited to 'scripts')

diff --git a/scripts/qemu-ifup b/scripts/qemu-ifup
new file mode 100755
index 0000000..20c10de
--- /dev/null
+++ b/scripts/qemu-ifup
@@ -0,0 +1,43 @@
+#! /bin/sh
+# Script to bring a network (tap) device for qemu up.
+# The idea is to add the tap device to the same bridge
+# as we have default routing to.
+
+
+# in order to be able to find brctl
+PATH=$PATH:/sbin:/usr/sbin
+ip=$(which ip)
+
+if [ -n "$ip" ]; then
+   ip link set "$1" up
+else
+   brctl=$(which brctl)
+   if [ ! "$ip" -o ! "$brctl" ]; then
+     echo "W: $0: not doing any bridge processing: neither ip nor brctl utility not found" >&2
+     exit 0
+   fi
+   ifconfig "$1" 0.0.0.0 up
+fi
+
+switch=$(ip route ls | \
+    awk '/^default / {
+          for(i=0;i<NF;i++) { if ($i == "dev") { print $(i+1); next; } }
+         }'
+        )
+
+# only add the interface to default-route bridge if we
+# have such interface (with default route) and if that
+# interface is actually a bridge.
+# It is possible to have several default routes too
+for br in $switch; do
+    if [ -d /sys/class/net/$br/bridge/. ]; then
+        if [ -n "$ip" ]; then
+          ip link set "$1" master "$br"
+        else
+          brctl addif $br "$1"
+        fi
+        exit	# exit with status of the previous command
+    fi
+done
+
+echo "W: $0: no bridge for guest interface found" >&2
-- 
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