busybox: add initial systemd support

Signed-off-by: Stephan Raue <stephan@openelec.tv>

packages/sysutils/busybox/install

@@ -72,6 +72,10 @@ USER_PWD="`$ROOT/$TOOLCHAIN/bin/cryptpw -m sha512 $USER_PASSWORD`"
   # create /etc/hostname
     ln -sf /proc/sys/kernel/hostname $INSTALL/etc/hostname
 
+  # systemd wahts /usr/bin/mkdir
+    mkdir -p $INSTALL/usr/bin
+      ln -sf /bin/busybox $INSTALL/usr/bin/mkdir
+
   # add webroot
     mkdir -p $INSTALL/usr/www
       echo "It works" > $INSTALL/usr/www/index.html
@@ -84,3 +88,7 @@ USER_PWD="`$ROOT/$TOOLCHAIN/bin/cryptpw -m sha512 $USER_PASSWORD`"
       mkdir -p $INSTALL/etc/init.d
       cp $PKG_DIR/scripts/09_crond $INSTALL/etc/init.d/
     fi
+
+  enable_service debug-shell.service
+  enable_service var.mount
+

packages/sysutils/busybox/system.d/debug-shell.service

@@ -0,0 +1,19 @@
+[Unit]
+Description=Debug Shell
+ConditionKernelCommandLine=debugging
+
+[Service]
+Environment=HOME=/storage TERM=linux
+WorkingDirectory=/storage
+ExecStart=/sbin/getty -n 38400 tty3
+Restart=always
+RestartSec=0
+TimeoutSec=0
+KillMode=process
+
+# Some login implementations ignore SIGTERM, so we send SIGHUP
+# instead, to ensure that login terminates cleanly.
+KillSignal=SIGHUP
+
+[Install]
+WantedBy=multi-user.target

packages/sysutils/busybox/system.d/var.mount

@@ -0,0 +1,22 @@
+#  This file is part of systemd.
+#
+#  systemd is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU Lesser General Public License as published by
+#  the Free Software Foundation; either version 2.1 of the License, or
+#  (at your option) any later version.
+
+[Unit]
+Description=Variable Directory
+Documentation=man:hier(7)
+Documentation=http://www.freedesktop.org/wiki/Software/systemd/APIFileSystems
+DefaultDependencies=no
+Conflicts=umount.target
+Before=local-fs.target umount.target
+
+[Mount]
+What=tmpfs
+Where=/var
+Type=tmpfs
+
+[Install]
+WantedBy=local-fs.target