[jhbuild/wip/rootowned: 1/2] helpr bits

[Colin Walters <walters src gnome org>]

commit f31838b37a434a72fd95eef87916818cc9fed85b
Author: Colin Walters <walters verbum org>
Date:   Wed Oct 5 18:00:44 2011 -0400

    helpr bits

 configure.ac                     |   11 ++
 jhbuild/Makefile.am              |    5 +
 jhbuild/jhbuild-install-helper.c |  216 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 232 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 357a7b1..39a097a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -21,6 +21,17 @@ AC_DEFINE_UNQUOTED([GETTEXT_PACKAGE], "$GETTEXT_PACKAGE", [Gettext package])
 AC_PROG_CC
 PKG_PROG_PKG_CONFIG
 
+AC_ARG_ENABLE(
+	os-building,
+	AS_HELP_STRING([--enable-os-building=@<:@no/yes@:>@], [If specified, provide support for root-owned builds]),
+	[enable_os_building=$enableval],
+	[enable_os_building=no])
+
+if test x$enable_os_building = xyes; then
+   PKG_CHECK_MODULES(GIO_UNIX, [gio-unix-2.0])
+fi
+AM_CONDITIONAL(OS_BUILDING, test x$enable_os_building=xyes)
+
 # Documentation
 AC_ARG_ENABLE(
 	doc_installation,
diff --git a/jhbuild/Makefile.am b/jhbuild/Makefile.am
index cd5fde4..7c327fe 100644
--- a/jhbuild/Makefile.am
+++ b/jhbuild/Makefile.am
@@ -11,3 +11,8 @@ app_PYTHON = \
 	moduleset.py \
 	monkeypatch.py
 
+libexec_PROGRAMS = jhbuild-install-helper
+
+jhbuild_install_helper_SOURCES = jhbuild-install-helper.c
+jhbuild_install_helper_CFLAGS = $(GIO_UNIX_CFLAGS)
+jhbuild_install_helper_LIBS = $(GIO_UNIX_LIBS)
diff --git a/jhbuild/jhbuild-install-helper.c b/jhbuild/jhbuild-install-helper.c
new file mode 100644
index 0000000..b2598e1
--- /dev/null
+++ b/jhbuild/jhbuild-install-helper.c
@@ -0,0 +1,216 @@
+#include <glib.h>
+
+#ifdef G_OS_UNIX
+#include <gio/gunixfdlist.h>
+/* For STDOUT_FILENO */
+#include <unistd.h>
+#endif
+
+#ifndef JHBUILD_ROOT
+#error JHBUILD_ROOT must be specified
+#endif
+
+typedef struct {
+  GDBusConnection *system_bus;
+
+  char *root;
+} JhbuildInstallHelper;
+
+static GDBusNodeInfo *introspection_data = NULL;
+
+static const gchar introspection_xml[] =
+  "<node>"
+  "  <interface name='org.gnome.JhbuildInstallHelper'>"
+  "    <method name='RootRebase'>"
+  "      <annotation name='org.gtk.GDBus.Annotation' value='OnMethod'/>"
+  "      <arg type='s' name='rootid' direction='in'/>"
+  "    </method>"
+  "    <method name='RootUpdateWithArtifact'>"
+  "      <annotation name='org.gtk.GDBus.Annotation' value='OnMethod'/>"
+  "      <arg type='s' name='rootid' direction='in'/>"
+  "      <arg type='h' name='tardata' direction='in'/>"
+  "    </method>"
+  "  </interface>"
+  "</node>";
+
+/* ---------------------------------------------------------------------------------------------------- */
+
+static void
+handle_method_call (GDBusConnection       *connection,
+                    const gchar           *sender,
+                    const gchar           *object_path,
+                    const gchar           *interface_name,
+                    const gchar           *method_name,
+                    GVariant              *parameters,
+                    GDBusMethodInvocation *invocation,
+                    gpointer               user_data)
+{
+  if (g_strcmp0 (method_name, "HelloWorld") == 0)
+    {
+      const gchar *greeting;
+
+      g_variant_get (parameters, "(&s)", &greeting);
+
+      if (g_strcmp0 (greeting, "Return Unregistered") == 0)
+        {
+          g_dbus_method_invocation_return_error (invocation,
+                                                 G_IO_ERROR,
+                                                 G_IO_ERROR_FAILED_HANDLED,
+                                                 "As requested, here's a GError not registered (G_IO_ERROR_FAILED_HANDLED)");
+        }
+      else if (g_strcmp0 (greeting, "Return Registered") == 0)
+        {
+          g_dbus_method_invocation_return_error (invocation,
+                                                 G_DBUS_ERROR,
+                                                 G_DBUS_ERROR_MATCH_RULE_NOT_FOUND,
+                                                 "As requested, here's a GError that is registered (G_DBUS_ERROR_MATCH_RULE_NOT_FOUND)");
+        }
+      else if (g_strcmp0 (greeting, "Return Raw") == 0)
+        {
+          g_dbus_method_invocation_return_dbus_error (invocation,
+                                                      "org.gtk.GDBus.SomeErrorName",
+                                                      "As requested, here's a raw D-Bus error");
+        }
+      else
+        {
+          gchar *response;
+          response = g_strdup_printf ("You greeted me with '%s'. Thanks!", greeting);
+          g_dbus_method_invocation_return_value (invocation,
+                                                 g_variant_new ("(s)", response));
+          g_free (response);
+        }
+    }
+  else if (g_strcmp0 (method_name, "EmitSignal") == 0)
+    {
+      GError *local_error;
+      gdouble speed_in_mph;
+      gchar *speed_as_string;
+
+      g_variant_get (parameters, "(d)", &speed_in_mph);
+      speed_as_string = g_strdup_printf ("%g mph!", speed_in_mph);
+
+      local_error = NULL;
+      g_dbus_connection_emit_signal (connection,
+                                     NULL,
+                                     object_path,
+                                     interface_name,
+                                     "VelocityChanged",
+                                     g_variant_new ("(ds)",
+                                                    speed_in_mph,
+                                                    speed_as_string),
+                                     &local_error);
+      g_assert_no_error (local_error);
+      g_free (speed_as_string);
+
+      g_dbus_method_invocation_return_value (invocation, NULL);
+    }
+  else if (g_strcmp0 (method_name, "GimmeStdout") == 0)
+    {
+#ifdef G_OS_UNIX
+      if (g_dbus_connection_get_capabilities (connection) & G_DBUS_CAPABILITY_FLAGS_UNIX_FD_PASSING)
+        {
+          GDBusMessage *reply;
+          GUnixFDList *fd_list;
+          GError *error;
+
+          fd_list = g_unix_fd_list_new ();
+          error = NULL;
+          g_unix_fd_list_append (fd_list, STDOUT_FILENO, &error);
+          g_assert_no_error (error);
+
+          reply = g_dbus_message_new_method_reply (g_dbus_method_invocation_get_message (invocation));
+          g_dbus_message_set_unix_fd_list (reply, fd_list);
+
+          error = NULL;
+          g_dbus_connection_send_message (connection,
+                                          reply,
+                                          G_DBUS_SEND_MESSAGE_FLAGS_NONE,
+                                          NULL, /* out_serial */
+                                          &error);
+          g_assert_no_error (error);
+
+          g_object_unref (invocation);
+          g_object_unref (fd_list);
+          g_object_unref (reply);
+        }
+      else
+        {
+          g_dbus_method_invocation_return_dbus_error (invocation,
+                                                      "org.gtk.GDBus.Failed",
+                                                      "Your message bus daemon does not support file descriptor passing (need D-Bus >= 1.3.0)");
+        }
+#else
+      g_dbus_method_invocation_return_dbus_error (invocation,
+                                                  "org.gtk.GDBus.NotOnUnix",
+                                                  "Your OS does not support file descriptor passing");
+#endif
+    }
+}
+
+static void
+on_bus_acquired (GDBusConnection  *connection,
+		 const char       *name,
+		 gpointer          user_data)
+{
+  JhbuildInstallHelper *helper = user_data;
+
+  helper->system_bus = g_object_ref (connection);
+}
+
+static void
+on_name_acquired (GDBusConnection  *connection,
+		  const char       *name,
+		  gpointer          user_data)
+{
+  JhbuildInstallHelper *helper = user_data;
+
+  
+}
+
+static void
+on_name_lost (GDBusConnection     *connection,
+	      const char          *name,
+	      gpointer             user_data)
+{
+  JhbuildInstallHelper *helper = user_data;
+  
+  
+}
+	      
+static void
+install_helper_run (JhbuildInstallHelper *helper)
+{
+  GError *error = NULL;
+  
+  helper->system_bus = g_bus_get_sync (G_BUS_TYPE_SYSTEM, NULL, &error);
+  if (!helper->system_bus)
+    g_error ("%s", error->message);
+
+  g_bus_own_name (G_BUS_TYPE_SYSTEM,
+		  "org.gnome.JhbuildInstallHelper",
+		  G_BUS_NAME_OWNER_FLAGS_ALLOW_REPLACEMENT,
+		  on_bus_acquired,
+		  on_name_acquired,
+		  on_name_lost,
+		  helper,
+		  NULL);
+}
+
+int
+main (int    argc,
+      char **argv,
+      char **envp)
+{
+  GMainLoop *loop;
+  JhbuildInstallHelper helper;
+
+  g_type_init ();
+
+  loop = g_main_loop_new (NULL, TRUE);
+  
+  install_helper_run (&helper);
+
+  g_main_loop_run (loop);
+
+  return 0;
+}