integrate with busybox init system

busybox's init uses /etc/inittab for configuration just like sysvinit,
however it doesn't use any runlevels.

the tty part of inittab is appended to "/dev/", and it becomes connected
to the stdout of the spawned process

Signed-off-by: Petros Angelatos <petrosagg@gmail.com>

entry.sh

@@ -1,45 +1,22 @@
 #!/bin/sh
 
-set -e
+set -o errexit
 
 [ -d /dev/net ] ||
     mkdir -p /dev/net
 [ -c /dev/net/tun ] ||
     mknod /dev/net/tun c 10 200
 
-cd /app
-
-mkdir -p /var/log/supervisor && touch /var/log/supervisor/supervisord.log
-mkdir -p /var/run/resin
 mount -t tmpfs -o size=1m tmpfs /var/run/resin
 
-if [ -z "$GOSUPER_SOCKET" ]; then
-	export GOSUPER_SOCKET=/var/run/resin/gosuper.sock
-fi
-if [ -z "$DOCKER_SOCKET" ]; then
-	export DOCKER_SOCKET=/run/docker.sock
-fi
-if [ -z "$HOST_PROC" ]; then
-	export HOST_PROC=/mnt/root/proc
-fi
-
-export DBUS_SYSTEM_BUS_ADDRESS="unix:path=/mnt/root/run/dbus/system_bus_socket"
-
 # If DOCKER_ROOT isn't set then default it
 if [ -z "${DOCKER_ROOT}" ]; then
 	DOCKER_ROOT=/mnt/root/var/lib/rce
 fi
+
 # Mount the DOCKER_ROOT path equivalent in the container fs
 DOCKER_LIB_PATH=${DOCKER_ROOT#/mnt/root}
+
 if [ ! -d "${DOCKER_LIB_PATH}" ]; then
 	ln -s "${DOCKER_ROOT}" "${DOCKER_LIB_PATH}"
 fi
-
-/usr/bin/supervisord -c /etc/supervisor/supervisord.conf
-
-supervisorctl start resin-supervisor
-supervisorctl start go-supervisor
-
-tail -F \
-	/var/log/supervisor/supervisord.log \
-	/var/log/resin_supervisor_stdout.log

inittab

@@ -0,0 +1,7 @@
+# busybox inittab
+# format: tty:ignored:action:command
+
+stdout::sysinit:/usr/src/app/entry.sh
+
+stdout::respawn:/usr/src/app/run.sh node /usr/src/app/src/app.js
+stdout::respawn:/usr/src/app/run.sh /usr/src/app/gosuper

package.json

@@ -3,8 +3,7 @@
   "version": "2.1.1",
   "scripts": {
     "start": "./entry.sh",
-    "lint": "resin-lint src/",
+    "lint": "resin-lint src/"
-    "start": "./entry.sh"
   },
   "dependencies": {
     "JSONStream": "^1.1.2",

run.sh

@@ -0,0 +1,22 @@
+#!/bin/sh
+
+if [ -z "$GOSUPER_SOCKET" ]; then
+	export GOSUPER_SOCKET=/var/run/resin/gosuper.sock
+fi
+
+if [ -z "$DOCKER_SOCKET" ]; then
+	export DOCKER_SOCKET=/run/docker.sock
+fi
+
+if [ -z "$HOST_PROC" ]; then
+	export HOST_PROC=/mnt/root/proc
+fi
+
+export DBUS_SYSTEM_BUS_ADDRESS="unix:path=/mnt/root/run/dbus/system_bus_socket"
+
+# If DOCKER_ROOT isn't set then default it
+if [ -z "${DOCKER_ROOT}" ]; then
+	DOCKER_ROOT=/mnt/root/var/lib/rce
+fi
+
+exec $@