add network up script

creator_functions.sh

@@ -18,21 +18,22 @@ echo_red() {
 
 create_dirs() {
   rm -rf "$ROOT" 2>/dev/null
-  mkdir -p "$ROOT" "${ROOT}/usr/bin/"
-  mkdir -p ${ROOT}/usr/bin
-  mkdir -p ${ROOT}/usr/lib
-  mkdir -p ${ROOT}/dev
-  mkdir -p ${ROOT}/proc
-  mkdir -p ${ROOT}/run
-  mkdir -p ${ROOT}/tmp
-  mkdir -p ${ROOT}/var
-  ln -s usr/bin ${ROOT}/bin
-  ln -s usr/bin ${ROOT}/sbin
-  ln -s usr/lib ${ROOT}/lib
-  ln -s usr/lib ${ROOT}/lib64
-  ln -s lib ${ROOT}/usr/lib64
-  ln -s bin ${ROOT}/usr/sbin
-  ln -s ../run ${ROOT}/var/run
+  mkdir -p "${ROOT}/usr/bin/"
+  mkdir -p "${ROOT}/usr/bin"
+  mkdir -p "${ROOT}/usr/lib"
+  mkdir -p "${ROOT}/dev"
+  mkdir -p "${ROOT}/etc"
+  mkdir -p "${ROOT}/proc"
+  mkdir -p "${ROOT}/run"
+  mkdir -p "${ROOT}/tmp"
+  mkdir -p "${ROOT}/var"
+  ln -s usr/bin "${ROOT}/bin"
+  ln -s usr/bin "${ROOT}/sbin"
+  ln -s usr/lib "${ROOT}/lib"
+  ln -s usr/lib "${ROOT}/lib64"
+  ln -s lib "${ROOT}/usr/lib64"
+  ln -s bin "${ROOT}/usr/sbin"
+  ln -s ../run "${ROOT}/var/run"
 }
 
 # Installs a library. Expects absolute path.

init.sh

@@ -2,5 +2,6 @@
 source /init_functions.sh
 create_mounts
 load_modules
+setup_network
 mount_root
 exec switch_root /mnt /sbin/init "$@"

init_functions.sh

@@ -33,6 +33,25 @@ create_mounts() {
     ln -sfT /proc/self/fd/2 /dev/stderr
 }
 
+# expects kernel param in this format: detee_net=192.168.122.140_24_192.168.122.1_1.1.1.1
+setup_network() {
+  local settings='' ip_addr='' mask='' cidr='' gateway='' nameserver=''
+  settings=$(cat /proc/cmdline | grep -oE 'detee_net=[0-9a-z\_\:\.]+' | cut -d '=' -f2)
+  # TODO: replace with exit 0 when you are ready to force a kernel panic
+  [[ -z "$settings" ]] && return 0
+  settings="${settings#detee_net=}"
+  ip_addr="$( echo ${settings} | cut -d'_' -f1 )"
+  mask="$( echo ${settings} | cut -d'_' -f2 )"
+  cidr="${ip_addr}/${mask}"
+  gateway="$( echo ${settings} | cut -d'_' -f4 )"
+  nameserver="$( echo ${settings} | cut -d'_' -f5 )"
+
+  ip addr add $cidr dev eth0
+  ip link set eth0 up
+  ip route add default via $gateway
+  echo nameserver $nameserver > /etc/resolv.conf
+}
+
 mount_root() {
   mkdir /mnt
   mount /dev/vda3 /mnt