add wayland session manager

recipes-diya/diya-session-manager/files/daemon.conf

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+# this file is the configuration file for the SessionMaganer daemon
+# daemon
+# By default, the daemon will look for this file in the following locations
+# /etc/diya/daemon.conf
+# or it can be specified using the -c option
+# example: diya-session-manager -c /path/to/daemon.conf
+
+# Login session command
+# The command to run to start a login session
+# this command will handle the user input and send user
+# credentials to the daemon via Dbus message
+login_session_command = diya-session-launch diyac -x diya-login-shell
+
+# login session user
+# The user that owns the login session, root by default
+# if this setting is not set
+login_session_user = xdg
+
+# User session command
+# The command to run to start a user session after the
+# login session is successful
+# the logged in user will own this session
+
+user_session_command = diya-session-launch diyac -x diya-shell

recipes-diya/diya-session-manager/files/dbus-diya.conf

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+<!DOCTYPE busconfig PUBLIC
+          "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
+          "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
+<busconfig>
+
+  <!-- Only root can own the service -->
+  <policy user="root">
+    <allow own="dev.iohub.diya.SessionManager"/>
+  </policy>
+  
+  <!--deny all access from another user-->
+    <policy context="default">
+        <deny send_destination="dev.iohub.diya.SessionManager"/>
+        <deny receive_sender="dev.iohub.diya.SessionManager"/>
+  </policy>
+  
+  <policy user="xdg">
+    <allow send_destination="dev.iohub.diya.SessionManager"/>
+    <allow receive_sender="dev.iohub.diya.SessionManager"/>
+  </policy>
+  
+  <policy user="root">
+    <allow send_destination="dev.iohub.diya.SessionManager"/>
+    <allow receive_sender="dev.iohub.diya.SessionManager"/>
+  </policy>
+
+</busconfig>

recipes-diya/diya-session-manager/files/diya-session-launch

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+#! /bin/sh
+
+handle()
+{
+    echo "SIGINT detected. continue."
+}
+
+# start dbus session and get env:
+#
+# DBUS_SESSION_BUS_ADDRESS='unix:path=/tmp/dbus-...
+# export DBUS_SESSION_BUS_ADDRESS;
+# DBUS_SESSION_BUS_PID=3598;
+
+
+# shellcheck disable=SC1091
+. /etc/profile
+
+eval "$(dbus-launch --auto-syntax)"
+
+# trap the sigint
+trap 'handle' INT
+"$@"
+
+# stop the
+kill -9 "$DBUS_SESSION_BUS_PID"
+echo "Session closed"

recipes-diya/diya-session-manager/files/diya-sessiond

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+#! /bin/sh
+### BEGIN INIT INFO
+# Provides:          diya
+# Short-Description: simple session manager
+# Description:       session manager that allows user login and
+#                    start user session
+### END INIT INFO
+#
+# -*- coding: utf-8 -*-
+
+# set -e
+
+# shellcheck disable=SC1091
+. /etc/init.d/functions
+
+DAEMON=/usr/bin/diya-session-manager
+NAME=diya-sessiond
+PIDFILE=/var/run/diya/sessiond.pid
+DESC="Diya session manager"
+DAEMONUSER="root"
+PARAMS="-c /etc/diya/daemon.conf"
+test -x $DAEMON || exit 0
+
+start_it_up()
+{
+  mkdir -p "$(dirname $PIDFILE)"
+  if [ -e $PIDFILE ]; then
+    PIDDIR=/proc/$(cat $PIDFILE)
+    if [ -d ${PIDDIR} -a  "$(readlink -f ${PIDDIR}/exe)" = "${DAEMON}" ]; then 
+      echo "$DESC already started; not starting."
+    else
+      echo "Removing stale PID file $PIDFILE."
+      rm -f $PIDFILE
+    fi
+  fi
+
+  echo -n "Starting $DESC: "
+  start-stop-daemon -o --start --quiet --pidfile $PIDFILE \
+    --user $DAEMONUSER --exec $DAEMON -- $PARAMS
+  echo "$NAME."
+}
+
+shut_it_down()
+{
+  echo -n "Stopping $DESC: "
+  start-stop-daemon -o --stop  --quiet --pidfile $PIDFILE \
+    --user $DAEMONUSER
+  # We no longer include these arguments so that start-stop-daemon
+  # can do its job even given that we may have been upgraded.
+  # We rely on the pidfile being sanely managed
+  # --exec $DAEMON -- --system $PARAMS
+  echo "$NAME."
+  rm -f $PIDFILE
+}
+
+case "$1" in
+  start)
+    start_it_up
+  ;;
+  stop)
+    shut_it_down
+  ;;
+  status)
+    status $DAEMON
+    exit $?
+  ;;
+  restart)
+    shut_it_down
+    sleep 1
+    start_it_up
+  ;;
+  *)
+    echo "Usage: /etc/init.d/$NAME {start|stop|status|restart}" >&2
+    exit 1
+  ;;
+esac
+
+exit 0