Chroot: Generate interfaces network config

debian/chroot.install

@@ -198,6 +198,28 @@ grep "/var/tmp" /target/etc/fstab  || echo "/tmp                  /var/tmp    no
 
 ### Remove all occurrences to /target
 sed -i 's;/target;;g' /target/etc/fstab
+## }}}
+## Network {{{
+net_device=$(ip r | grep "^default" | head -1 | cut -d" " -f5)
+net_address=$(ip r | grep -vE "(^default|metric)" | grep "${net_device}.*src" | head -1 | awk -F" " '{print $NF}')
+net_netmask=$(ipcalc "${net_address}" | awk '/Netmask:/{print $2;}')
+net_broadcast=$(ip a s dev "${net_device}" | awk '/inet.*brd/{print $4}')
+net_network=$(ip r | grep -vE "(^default|metric)" | grep "src ${net_address}" | head -1 | cut -d"/" -f1)
+net_gateway=$(ip r | grep "^default" | head -1 | cut -d" " -f3)
+
+printf '%b' "auto lo
+iface lo inet loopback
+
+auto ${net_device}
+iface ${net_device} inet static
+	address ${net_address}
+	netmask ${net_netmask}
+	network ${net_network}
+	broadcast ${net_broadcast}
+	gateway ${net_gateway}
+
+source-directory /etc/network/interfaces.d" > /target/etc/network/interfaces
+
 ## }}}
 # }}}
 # Finish {{{