read boot interface at boot

debian-devuan-netboot.sh

@@ -23,15 +23,11 @@ keyurl=https://code.ungleich.ch/ungleich-public/__ungleich_staff_ssh_access/raw/
 
 debootstrap "${suite}" "${dir}"
 
-chroot ${dir} apt install  -y openssh-server rdnssd linux-image-amd64
+# need non-free for firmware-bnx2
+echo 'deb http://pkgmaster.devuan.org/merged ${suite} main contrib non-free' > ${dir}/etc/apt/sources.list
 
-cat > ${dir}/etc/network/interfaces << EOF
-auto lo
-iface lo inet loopback
+chroot ${dir} apt install  -y openssh-server rdnssd linux-image-amd64 firmware-bnx2
 
-auto eth0
-iface eth0 inet6 auto
-EOF
 
 cp ${dir}/boot/vmlinuz-* ${kernel}
 
@@ -43,6 +39,33 @@ for key in balazs dominique jinguk nico; do
     curl -s ${keyurl}/${key}.pub >> ${dir}/root/.ssh/authorized_keys
 done
 
+################################################################################
+# networking
+
+# always lo
+cat > ${dir}/etc/network/interfaces << EOF
+auto lo
+iface lo inet loopback
+
+EOF
+
+# find the boot interfaces at boot
+cat > ${dir}/etc/rc.local <<EOF
+mac=\$(cat /proc/cmdline | tr ' ' '\n' | awk -F= '/bootdev/ { print \$2 }')
+dev=\$(ip -o link | awk -F: "/\$mac/ { print \\\$2 }" | sed 's/ *//g')
+
+cat > /etc/network/interfaces.d/bootinterface << eof
+auto \$dev
+iface \$dev inet6 auto
+eof
+
+ifup "\${dev}"
+
+exit 0
+
+
+EOF
+
 # ensure there is /init in the initramfs -> otherwise there is a kernel panic
 # reason: initramfs is designed to be PRE regular os, so /init usually hands over to /sbin/init
 # in our case, they are just the same