daemon: Start of work on daemon

.gitignore

@@ -47,3 +47,10 @@ rpm-ostree-*.tar.xz
 rpm-ostree-*.rpm
 
 rpm-ostree.1
+
+rpm-ostreed
+rpm-ostreed.1
+org.projectatomic.rpmostree1.service
+rpm-ostreed.service
+rpm-ostreed-generated.c
+rpm-ostreed-generated.h

Makefile-daemon.am

@@ -0,0 +1,84 @@
+libexec_PROGRAMS += rpm-ostreed
+
+dbus_built_sources = rpm-ostreed-generated.h rpm-ostreed-generated.c
+
+rpm-ostreed-generated.h: rpm-ostreed-generated.c
+rpm-ostreed-generated.c: Makefile.am $(top_srcdir)/src/daemon/org.projectatomic.rpmostree1.xml
+	$(AM_V_GEN) gdbus-codegen \
+		--interface-prefix org.projectatomic.rpmostree1 \
+		--c-namespace RPMOSTree \
+		--c-generate-object-manager \
+		--generate-c-code rpm-ostreed-generated \
+		$(top_srcdir)/src/daemon/org.projectatomic.rpmostree1.xml \
+		$(NULL)
+BUILT_SOURCES += $(dbus_built_sources)
+CLEANFILES += rpm-ostreed-generated*
+
+noinst_LTLIBRARIES += librpmostreed.la
+nodist_librpmostreed_la_SOURCES = $(dbus_built_sources)
+
+librpmostreed_la_SOURCES = \
+	src/daemon/daemon.h \
+	src/daemon/daemon.c \
+	$(NULL)
+
+librpmostreed_la_CFLAGS = \
+	$(AM_CFLAGS) \
+	$(PKGDEP_RPMOSTREE_CFLAGS) \
+	-DG_LOG_DOMAIN=\"rpm-ostreed\" \
+	-I$(srcdir)/src/daemon \
+	-I$(srcdir)/libglnx \
+	-I$(srcdir)/src/lib \
+	$(NULL)
+
+librpmostreed_la_LIBADD = \
+	$(AM_LDFLAGS) \
+	$(PKGDEP_RPMOSTREE_LIBS) \
+	librpmostree-1.la \
+	$(CAP_LIBS)
+	$(NULL)
+
+rpm_ostreed_SOURCES = \
+	src/daemon/main.c \
+	$(NULL)
+
+rpm_ostreed_CFLAGS = \
+	$(AM_CFLAGS) \
+	-DPKGLIBDIR=\"$(pkglibdir)\" \
+	$(PKGDEP_RPMOSTREE_CFLAGS) \
+	-I$(srcdir)/src/daemon \
+	-I$(srcdir)/libglnx \
+	-DG_LOG_DOMAIN=\"rpm-ostreed\" \
+	$(NULL)
+
+rpm_ostreed_LDADD = \
+	librpmostreed.la \
+	$(AM_LDFLAGS) \
+	$(PKGDEP_RPMOSTREE_LIBS) \
+	$(NULL)
+
+dbusconf_DATA = $(srcdir)/src/daemon/org.projectatomic.rpmostree1.conf
+dbusconfdir = ${sysconfdir}/dbus-1/system.d
+
+systemdunit_in_files = $(srcdir)/src/daemon/rpm-ostreed.service.in
+systemdunit_DATA     = $(systemdunit_in_files:.service.in=.service)
+systemdunitdir       = $(prefix)/lib/systemd/system/
+$(systemdunit_DATA):
+	$(SED_SUBST) $@.in > $@
+
+service_in_files = $(srcdir)/src/daemon/org.projectatomic.rpmostree1.service.in
+service_DATA     = $(service_in_files:.service.in=.service)
+servicedir       = $(dbusservicedir)
+$(service_DATA):
+	$(SED_SUBST) $@.in > $@
+
+EXTRA_DIST += \
+	$(dbusservice_DATA) \
+	$(service_in_files) \
+	$(systemdunit_in_files) \
+	$(NULL)
+
+CLEANFILES += \
+	$(service_DATA) \
+	$(systemdunit_DATA) \
+	$(NULL)

Makefile-rpm-ostree.am

@@ -18,6 +18,8 @@
 bin_PROGRAMS += rpm-ostree
 
 rpm_ostree_SOURCES = src/app/main.c \
+	rpm-ostreed-generated.h \
+	rpm-ostreed-generated.c \
 	src/app/rpmostree-builtins.h \
 	src/app/rpmostree-db-builtins.h \
 	src/app/rpmostree-compose-builtins.h \

Makefile.am

@@ -35,9 +35,13 @@ AM_CFLAGS += $(WARN_CFLAGS)
 
 EXTRA_DIST += autogen.sh COPYING
 
+SED_SUBST = sed \
+        -e 's,[@]libexecdir[@],$(libexecdir),g' \
+        $(NULL)
+
 libglnx_srcpath := $(srcdir)/libglnx
 libglnx_cflags := $(PKGDEP_GIO_UNIX_CFLAGS) -I$(libglnx_srcpath) -fvisibility=hidden
-libglnx_ldflags := 
+libglnx_ldflags :=
 libglnx_libs := $(PKGDEP_GIO_UNIX_LIBS)
 
 include $(INTROSPECTION_MAKEFILE)
@@ -48,6 +52,7 @@ include libglnx/Makefile-libglnx.am
 noinst_LTLIBRARIES += libglnx.la
 include Makefile-libpriv.am
 include Makefile-lib.am
+include Makefile-daemon.am
 include Makefile-rpm-ostree.am
 include Makefile-tests.am
 include Makefile-man.am

configure.ac

@@ -13,6 +13,19 @@ AC_SYS_LARGEFILE
 AC_PROG_CC
 AM_PROG_CC_C_O
 
+# dbus system dir
+AC_MSG_CHECKING(for dbus system services directory)
+if test "$enable_prefix_only" = "yes"; then
+  dbusservicedir='${datadir}/dbus-1/system-services'
+else
+  dbusservicedir='${datadir}/dbus-1/system-services'
+  if test "$dbusservicedir" = ""; then
+    AC_MSG_ERROR(Couldn't find dbus services directory. Try installing dbus-devel)
+  fi
+fi
+AC_SUBST([dbusservicedir], [$dbusservicedir])
+AC_MSG_RESULT(dbusservicedir)
+
 changequote(,)dnl
 if test "x$GCC" = "xyes"; then
   WARN_CFLAGS="-Wall -Wstrict-prototypes -Werror=missing-prototypes \

packaging/rpm-ostree.spec.in

@@ -52,6 +52,10 @@ find $RPM_BUILD_ROOT -name '*.la' -delete
 %{_mandir}/man1/*
 %{_libdir}/*.so.1*
 %{_libdir}/girepository-1.0/*.typelib
+%{_libexecdir}/rpm-ostreed
+%{_datadir}/dbus-1/system-services/org.projectatomic.rpmostree1.service
+%{_prefix}/lib/systemd/system/rpm-ostreed.service
+%{_sysconfdir}/dbus-1/system.d/org.projectatomic.rpmostree1.conf
 
 %files devel
 %{_libdir}/lib*.so

src/daemon/daemon.c

@@ -0,0 +1,313 @@
+/*
+* Copyright (C) 2015 Red Hat, Inc.
+*
+* This program is free software; you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation; either version 2 of the License, or
+* (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program; if not, write to the Free Software
+* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+*/
+
+#include "config.h"
+
+#include "daemon.h"
+#include "types.h"
+
+#include "libgsystem.h"
+
+/**
+ * SECTION:daemon
+ * @title: Daemon
+ * @short_description: Main daemon object
+ *
+ * Object holding all global state.
+ */
+
+enum {
+  FINISHED,
+  NUM_SIGNALS
+};
+
+static guint signals[NUM_SIGNALS] = { 0, };
+
+typedef struct _DaemonClass DaemonClass;
+
+/**
+ * Daemon:
+ *
+ * The #Daemon structure contains only private data and should only be
+ * accessed using the provided API.
+ */
+struct _Daemon
+{
+  GObject parent_instance;
+
+  gint name_owner_id;
+  gboolean name_owned;
+  gboolean on_message_bus;
+
+  gint64 last_message;
+  guint ticker_id;
+
+  GMutex mutex;
+  gint num_tasks;
+
+  gchar *sysroot_path;
+
+  GDBusConnection *connection;
+  GDBusObjectManagerServer *object_manager;
+};
+
+
+struct _DaemonClass
+{
+  GObjectClass parent_class;
+};
+
+static Daemon *_daemon_instance;
+
+enum
+{
+  PROP_0,
+  PROP_CONNECTION,
+  PROP_OBJECT_MANAGER,
+  PROP_SYSROOT_PATH,
+  PROP_ON_MESSAGE_BUS,
+};
+
+G_DEFINE_TYPE (Daemon, daemon, G_TYPE_OBJECT);
+
+typedef struct {
+  GAsyncReadyCallback callback;
+  gpointer callback_data;
+  gpointer proxy_source;
+} DaemonTaskData;
+
+
+static void
+daemon_finalize (GObject *object)
+{
+  Daemon *self = DAEMON (object);
+  if (self->name_owner_id)
+    g_bus_unown_name (self->name_owner_id);
+
+  g_clear_object (&self->object_manager);
+  self->object_manager = NULL;
+
+  g_object_unref (self->connection);
+
+  if (self->ticker_id > 0)
+    g_source_remove (self->ticker_id);
+
+  g_mutex_clear (&self->mutex);
+
+  g_free (self->sysroot_path);
+  G_OBJECT_CLASS (daemon_parent_class)->finalize (object);
+
+  _daemon_instance = NULL;
+}
+
+
+static void
+daemon_get_property (GObject *object,
+                     guint prop_id,
+                     GValue *value,
+                     GParamSpec *pspec)
+{
+  Daemon *self = DAEMON (object);
+
+  switch (prop_id)
+    {
+    case PROP_OBJECT_MANAGER:
+      g_value_set_object (value, self->object_manager);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+    }
+}
+
+
+static void
+daemon_set_property (GObject *object,
+                     guint prop_id,
+                     const GValue *value,
+                     GParamSpec *pspec)
+{
+  Daemon *self = DAEMON (object);
+
+  switch (prop_id)
+    {
+    case PROP_CONNECTION:
+      g_assert (self->connection == NULL);
+      self->connection = g_value_dup_object (value);
+      break;
+    case PROP_SYSROOT_PATH:
+      g_assert (self->sysroot_path == NULL);
+      self->sysroot_path = g_value_dup_string (value);
+      break;
+   case PROP_ON_MESSAGE_BUS:
+      self->on_message_bus = g_value_get_boolean (value);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+    }
+}
+
+
+static void
+daemon_init (Daemon *self)
+{
+  g_assert (_daemon_instance == NULL);
+  _daemon_instance = self;
+
+  self->num_tasks = 0;
+  self->last_message = g_get_monotonic_time ();
+  self->sysroot_path = NULL;
+
+  g_mutex_init (&self->mutex);
+}
+
+static void
+on_name_lost (GDBusConnection *connection,
+              const gchar *name,
+              gpointer user_data)
+{
+  Daemon *self = user_data;
+  self->name_owned = FALSE;
+}
+
+static void
+on_name_acquired (GDBusConnection *connection,
+                  const gchar *bus_name,
+                  gpointer user_data)
+{
+  Daemon *self = user_data;
+  self->name_owned = TRUE;
+}
+
+static void
+daemon_constructed (GObject *_object)
+{
+  Daemon *self;
+  GError *error = NULL;
+  gs_free gchar *path = NULL;
+
+  self = DAEMON (_object);
+  self->object_manager = g_dbus_object_manager_server_new (BASE_DBUS_PATH);
+  /* Export the ObjectManager */
+  g_dbus_object_manager_server_set_connection (self->object_manager, self->connection);
+  g_debug ("exported object manager");
+
+  if (self->on_message_bus)
+    {
+      self->name_owner_id = g_bus_own_name_on_connection (self->connection,
+                                                          DBUS_NAME,
+                                                          G_BUS_NAME_OWNER_FLAGS_NONE,
+                                                          on_name_acquired,
+                                                          on_name_lost,
+                                                          self,
+                                                          NULL);
+    }
+
+  G_OBJECT_CLASS (daemon_parent_class)->constructed (_object);
+
+  g_dbus_connection_start_message_processing (self->connection);
+
+  g_debug ("daemon constructed");
+  g_clear_error (&error);
+}
+
+static void
+daemon_class_init (DaemonClass *klass)
+{
+  GObjectClass *gobject_class;
+  gobject_class = G_OBJECT_CLASS (klass);
+  gobject_class->finalize     = daemon_finalize;
+  gobject_class->constructed  = daemon_constructed;
+  gobject_class->set_property = daemon_set_property;
+  gobject_class->get_property = daemon_get_property;
+
+  /**
+   * Daemon:connection:
+   *
+   * The #GDBusConnection the daemon is for.
+   */
+  g_object_class_install_property (gobject_class,
+                                   PROP_CONNECTION,
+                                   g_param_spec_object ("connection",
+                                                        "Connection",
+                                                        "The D-Bus connection the daemon is for",
+                                                        G_TYPE_DBUS_CONNECTION,
+                                                        G_PARAM_WRITABLE |
+                                                        G_PARAM_CONSTRUCT_ONLY |
+                                                        G_PARAM_STATIC_STRINGS));
+  /**
+   * Daemon:object-manager:
+   *
+   * The #GDBusObjectManager used by the daemon
+   */
+  g_object_class_install_property (gobject_class,
+                                   PROP_OBJECT_MANAGER,
+                                   g_param_spec_object ("object-manager",
+                                                        "Object Manager",
+                                                        "The D-Bus Object Manager server used by the daemon",
+                                                        G_TYPE_DBUS_OBJECT_MANAGER_SERVER,
+                                                        G_PARAM_READABLE |
+                                                        G_PARAM_STATIC_STRINGS));
+
+  g_object_class_install_property (gobject_class,
+                                   PROP_SYSROOT_PATH,
+                                   g_param_spec_string ("sysroot-path",
+                                                         "Sysroot Path",
+                                                         "Sysroot location on the filesystem",
+                                                         FALSE,
+                                                         G_PARAM_WRITABLE |
+                                                         G_PARAM_CONSTRUCT_ONLY |
+                                                         G_PARAM_STATIC_STRINGS));
+
+  g_object_class_install_property (gobject_class,
+                                   PROP_ON_MESSAGE_BUS,
+                                   g_param_spec_boolean ("on-message-bus",
+                                                         "On Message Bus",
+                                                         "Are we listining on the message bus",
+                                                         TRUE,
+                                                         G_PARAM_WRITABLE |
+                                                         G_PARAM_CONSTRUCT_ONLY |
+                                                         G_PARAM_STATIC_STRINGS));
+
+  signals[FINISHED] = g_signal_new ("finished",
+                                    TYPE_DAEMON,
+                                    G_SIGNAL_RUN_LAST,
+                                    0, NULL, NULL,
+                                    g_cclosure_marshal_generic,
+                                    G_TYPE_NONE, 0);
+}
+
+/**
+ * daemon_get:
+ *
+ * Returns: (transfer none): The singleton #Daemon instance
+ */
+Daemon *
+daemon_get (void)
+{
+  g_assert (_daemon_instance);
+  return _daemon_instance;
+}
+
+gboolean
+daemon_on_message_bus (Daemon *self)
+{
+  return self->on_message_bus;
+}

src/daemon/daemon.h

@@ -0,0 +1,63 @@
+/*
+* Copyright (C) 2015 Red Hat, Inc.
+*
+* This program is free software; you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation; either version 2 of the License, or
+* (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program; if not, write to the Free Software
+* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+*/
+
+#ifndef RPM_OSTREED_DAEMON_H__
+#define RPM_OSTREED_DAEMON_H__
+
+#include "types.h"
+
+G_BEGIN_DECLS
+
+#define TYPE_DAEMON   (daemon_get_type ())
+#define DAEMON(o)     (G_TYPE_CHECK_INSTANCE_CAST ((o), TYPE_DAEMON, Daemon))
+#define IS_DAEMON(o)  (G_TYPE_CHECK_INSTANCE_TYPE ((o), TYPE_DAEMON))
+
+#define DBUS_NAME "org.projectatomic.rpmostree1"
+#define BASE_DBUS_PATH "/org/projectatomic/rpmostree1"
+
+GType                      daemon_get_type           (void) G_GNUC_CONST;
+
+Daemon *                   daemon_get                (void);
+
+gboolean                   daemon_on_message_bus     (Daemon *self);
+
+Daemon *                   daemon_new                (GDBusConnection *connection,
+                                                      gboolean persist);
+
+void                       daemon_publish            (Daemon *self,
+                                                      const gchar *path,
+                                                      gboolean uniquely,
+                                                      gpointer thing);
+
+void                       daemon_unpublish          (Daemon *self,
+                                                      const gchar *path,
+                                                      gpointer thing);
+
+GTask *                    daemon_get_new_task        (Daemon *self,
+                                                       gpointer source_object,
+                                                       GCancellable *cancellable,
+                                                       GAsyncReadyCallback callback,
+                                                       gpointer callback_data);
+
+GDBusInterface *           daemon_get_interface       (Daemon *self,
+                                                       const gchar *object_path,
+                                                       const gchar *interface_name);
+
+G_END_DECLS
+
+#endif /* RPM_OSTREED_DAEMON_H__ */

src/daemon/main.c

@@ -0,0 +1,385 @@
+/*
+* Copyright (C) 2007-2010 David Zeuthen <zeuthen@gmail.com>
+* Copyright (C) 2013-2015 Red Hat, Inc.
+*
+* This program is free software; you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation; either version 2 of the License, or
+* (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program; if not, write to the Free Software
+* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+*/
+#include "config.h"
+#include "daemon.h"
+#include <glib/gi18n.h>
+#include <glib-unix.h>
+#include <gio/gio.h>
+#include <syslog.h>
+#include "libgsystem.h"
+
+/* ---------------------------------------------------------------------------------------------------- */
+static GMainLoop *loop = NULL;
+static gboolean opt_debug = FALSE;
+static char *opt_sysroot = "/";
+static gint service_dbus_fd = -1;
+static GOptionEntry opt_entries[] =
+{
+  {"debug", 'd', 0, G_OPTION_ARG_NONE, &opt_debug, "Print debug information on stderr", NULL},
+  { "sysroot", 0, 0, G_OPTION_ARG_STRING, &opt_sysroot, "Use system root SYSROOT (default: /)", "SYSROOT" },
+  { "dbus-peer", 0, 0, G_OPTION_ARG_INT, &service_dbus_fd, "Use a peer to peer dbus connection on this fd", NULL },
+  {NULL }
+};
+
+
+static void
+on_close (Daemon *daemon, gpointer data)
+{
+  g_object_unref (daemon);
+  g_main_loop_quit (loop);
+}
+
+static void
+start_daemon (GDBusConnection *connection,
+              gboolean on_messsage_bus,
+              gpointer user_data)
+{
+  Daemon **daemon = user_data;
+  *daemon = g_object_new (TYPE_DAEMON,
+                          "connection", connection,
+                          "sysroot-path", opt_sysroot,
+                          "on-message-bus", on_messsage_bus,
+                          NULL);
+  g_signal_connect (*daemon, "finished",
+                    G_CALLBACK (on_close), NULL);
+}
+
+
+static void
+on_bus_acquired (GObject *source,
+                 GAsyncResult *res,
+                 gpointer user_data)
+{
+  GDBusConnection *connection;
+  GError *error = NULL;
+  connection = g_bus_get_finish (res, &error);
+  if (error != NULL)
+    {
+      g_warning ("Couldn't connect to system bus: %s", error->message);
+      g_error_free (error);
+      g_main_loop_quit (loop);
+    }
+  else
+    {
+      g_debug ("Connected to the system bus");
+      start_daemon (connection, TRUE, user_data);
+    }
+}
+
+
+static void
+on_peer_acquired (GObject *source,
+                  GAsyncResult *result,
+                  gpointer user_data)
+{
+  GDBusConnection *connection;
+  GError *error = NULL;
+
+  connection = g_dbus_connection_new_finish (result, &error);
+  if (error != NULL)
+    {
+      g_warning ("Couldn't connect to peer: %s", error->message);
+      g_main_loop_quit (loop);
+      g_error_free (error);
+    }
+  else
+    {
+      g_debug ("connected to peer");
+      start_daemon (connection, FALSE, user_data);
+    }
+}
+
+
+static gboolean
+on_sigint (gpointer user_data)
+{
+  Daemon **daemon = user_data;
+  g_info ("Caught signal. Initiating shutdown");
+  on_close (*daemon, NULL);
+  return FALSE;
+}
+
+
+static gboolean
+on_stdin_close (GIOChannel *channel,
+                GIOCondition condition,
+                gpointer data)
+{
+  /* Nowhere to log */
+  syslog (LOG_INFO, "%s", "output closed");
+  g_main_loop_quit (loop);
+  return FALSE;
+}
+
+
+static void
+on_log_debug (const gchar *log_domain,
+             GLogLevelFlags log_level,
+             const gchar *message,
+             gpointer user_data)
+{
+  GString *string;
+  const gchar *progname;
+  const gchar *level;
+
+  string = g_string_new (NULL);
+  switch (log_level & G_LOG_LEVEL_MASK)
+    {
+      case G_LOG_LEVEL_DEBUG:
+        level = "DEBUG";
+        break;
+      case G_LOG_LEVEL_INFO:
+        level = "INFO";
+        break;
+      default:
+        level = "";
+        break;
+    }
+
+
+  progname = g_get_prgname ();
+  if (progname == NULL)
+    progname = "process";
+
+  if (message == NULL)
+    message = "(NULL) message";
+
+  g_string_append_printf (string, "(%s:%lu): ", progname, (gulong) getpid ());
+
+  if (log_domain != NULL)
+    g_string_append_printf (string, "%s-", log_domain);
+
+  g_string_append_printf (string, "%s: %s", level, message);
+
+  g_printerr ("%s\n", string->str);
+
+  g_string_free (string, TRUE);
+}
+
+
+static void
+on_log_handler (const gchar *log_domain,
+                GLogLevelFlags log_level,
+                const gchar *message,
+                gpointer user_data)
+{
+  static gboolean have_called_openlog = FALSE;
+  const gchar *domains;
+  int priority;
+
+  if (!have_called_openlog)
+    {
+      have_called_openlog = TRUE;
+      openlog (G_LOG_DOMAIN, LOG_CONS | LOG_NDELAY | LOG_PID, LOG_DAEMON);
+    }
+
+  /*
+  * Note: we should not call GLib fucntions here.
+  *
+  * Mapping glib log levels to syslog priorities
+  * is not at all obvious.
+  */
+  switch (log_level & G_LOG_LEVEL_MASK)
+    {
+    /*
+    * In GLib this is always fatal, caller of this
+    * function aborts()
+    */
+
+    case G_LOG_LEVEL_ERROR:
+      priority = LOG_CRIT;
+      break;
+
+    /*
+    * By convention in GLib applications, critical warnings
+    * are usually internal programmer error (ie: precondition
+    * failures). This maps well to LOG_CRIT.
+    */
+    case G_LOG_LEVEL_CRITICAL:
+      priority = LOG_CRIT;
+      break;
+
+    /*
+    * By convention in GLib apps, g_warning() is used for
+    * non-fatal problems, but ones that should be corrected
+    * or not be encountered in normal system behavior.
+    */
+    case G_LOG_LEVEL_WARNING:
+      priority = LOG_WARNING;
+      break;
+
+    /*
+    * These are related to bad input, or other hosts behaving
+    * badly. Map well to syslog warnings.
+    */
+    case G_LOG_LEVEL_MESSAGE:
+    default:
+      priority = LOG_WARNING;
+      break;
+
+    /* Informational messages, startup, shutdown etc. */
+    case G_LOG_LEVEL_INFO:
+      priority = LOG_INFO;
+      break;
+
+    /* Debug messages. */
+    case G_LOG_LEVEL_DEBUG:
+      domains = g_getenv ("G_MESSAGES_DEBUG");
+      if (domains == NULL ||
+          (strcmp (domains, "all") != 0 && (!log_domain || !strstr (domains, log_domain))))
+        return;
+
+      priority = LOG_INFO;
+      break;
+    }
+
+  syslog (priority, "%s", message);
+}
+
+
+static gboolean
+connect_to_bus_or_peer (gpointer daemon_p)
+{
+  gs_unref_object GSocketConnection *stream = NULL;
+  gs_unref_object GSocket *socket = NULL;
+  GError *error = NULL;
+  gs_free gchar *guid = NULL;
+  gboolean ret = FALSE;
+
+  if (service_dbus_fd == -1)
+    {
+      g_bus_get (G_BUS_TYPE_SYSTEM, NULL, &on_bus_acquired, daemon_p);
+      ret = TRUE;
+      goto out;
+    }
+
+  socket = g_socket_new_from_fd (service_dbus_fd, &error);
+  if (error != NULL)
+    {
+      g_warning ("Couldn't create socket: %s", error->message);
+      goto out;
+    }
+
+  stream = g_socket_connection_factory_create_connection (socket);
+  if (!stream)
+    {
+      g_warning ("Couldn't create socket stream");
+      goto out;
+    }
+
+  guid = g_dbus_generate_guid ();
+  g_dbus_connection_new (G_IO_STREAM (stream), guid,
+                         G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_SERVER |
+                         G_DBUS_CONNECTION_FLAGS_DELAY_MESSAGE_PROCESSING,
+                         NULL, NULL, on_peer_acquired, daemon_p);
+  ret = TRUE;
+
+out:
+  g_clear_error (&error);
+  return ret;
+}
+
+
+int
+main (int argc,
+      char **argv)
+{
+  GError *error;
+  GOptionContext *opt_context;
+  GIOChannel *channel;
+  Daemon *daemon = NULL;
+  gint ret;
+
+  ret = 1;
+  loop = NULL;
+  opt_context = NULL;
+
+  #if !GLIB_CHECK_VERSION(2,36,0)
+  g_type_init ();
+  #endif
+
+  /* See glib/gio/gsocket.c */
+  signal (SIGPIPE, SIG_IGN);
+
+  /* avoid gvfs (http://bugzilla.gnome.org/show_bug.cgi?id=526454) */
+  if (!g_setenv ("GIO_USE_VFS", "local", TRUE))
+    {
+      g_printerr ("Error setting GIO_USE_GVFS\n");
+      goto out;
+    }
+
+  opt_context = g_option_context_new ("rpm-ostreed -- rpm-ostree daemon");
+  g_option_context_add_main_entries (opt_context, opt_entries, NULL);
+  error = NULL;
+  if (!g_option_context_parse (opt_context, &argc, &argv, &error))
+    {
+      g_printerr ("Error parsing options: %s\n", error->message);
+      g_error_free (error);
+      goto out;
+    }
+
+  if (opt_debug)
+    {
+      g_log_set_handler (G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG | G_LOG_LEVEL_INFO, on_log_debug, NULL);
+      g_log_set_always_fatal (G_LOG_LEVEL_ERROR | G_LOG_LEVEL_CRITICAL | G_LOG_LEVEL_WARNING);
+
+      /* When in debug mode (often testing) we exit when stdin closes */
+      channel = g_io_channel_unix_new (0);
+      g_io_add_watch (channel, G_IO_HUP, on_stdin_close, NULL);
+      g_io_channel_unref (channel);
+    }
+  else
+    {
+      /* When not in debug mode, send all logging to syslog */
+      g_log_set_default_handler (on_log_handler, NULL);
+    }
+
+  if (g_getenv ("PATH") == NULL)
+    g_setenv ("PATH", "/usr/bin:/bin:/usr/sbin:/sbin", TRUE);
+
+  g_info ("rpm-ostreed starting");
+
+  loop = g_main_loop_new (NULL, FALSE);
+
+  g_unix_signal_add (SIGINT, on_sigint, &daemon);
+  g_unix_signal_add (SIGTERM, on_sigint, &daemon);
+
+  if (!connect_to_bus_or_peer (&daemon))
+    {
+      ret = 1;
+      goto out;
+    }
+
+  g_debug ("Entering main event loop");
+
+  g_main_loop_run (loop);
+
+  ret = 0;
+
+out:
+  if (loop != NULL)
+    g_main_loop_unref (loop);
+
+  if (opt_context != NULL)
+    g_option_context_free (opt_context);
+
+  g_info ("rpm-ostreed exiting");
+
+  return ret;
+}

src/daemon/org.projectatomic.rpmostree1.conf

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8"?> <!-- -*- XML -*- -->
+
+<!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="org.projectatomic.rpmostree1"/>
+  </policy>
+
+  <policy context="default">
+    <allow send_destination="org.projectatomic.rpmostree1"/>
+  </policy>
+</busconfig>

src/daemon/org.projectatomic.rpmostree1.service.in

@@ -0,0 +1,4 @@
+[D-BUS Service]
+Name=org.projectatomic.rpmostree1
+Exec=@libexecdir@/rpm-ostreed
+User=root

src/daemon/org.projectatomic.rpmostree1.xml

@@ -0,0 +1,11 @@
+<!DOCTYPE node PUBLIC
+"-//freedesktop//DTD D-BUS Object Introspection 1.0//EN"
+"http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd">
+<node name="/" xmlns:doc="http://www.freedesktop.org/dbus/1.0/doc.dtd">
+
+  <interface name="org.projectatomic.rpmostree1.Sysroot">
+    <!-- The booted OSName -->
+    <property name="Booted" type="o" access="read"/>
+
+  </interface>
+</node>

src/daemon/rpm-ostreed.service.in

@@ -0,0 +1,7 @@
+[Unit]
+Description=RPM OSTree Manager
+
+[Service]
+Type=dbus
+BusName=org.projectatomic.rpmostree1
+ExecStart=@libexecdir@/rpm-ostreed

src/daemon/types.h

@@ -0,0 +1,33 @@
+/*
+* Copyright (C) 2015 Red Hat, Inc.
+*
+* This program is free software; you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation; either version 2 of the License, or
+* (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program; if not, write to the Free Software
+* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+*/
+
+#ifndef RPM_OSTREED_TYPES_H__
+#define RPM_OSTREED_TYPES_H__
+
+#include <glib-unix.h>
+#include <gio/gio.h>
+
+#include "rpm-ostreed-generated.h"
+
+#include <stdint.h>
+#include <string.h>
+
+struct _Daemon;
+typedef struct _Daemon Daemon;
+
+#endif /* RPM_OSTREED_TYPES_H__ */