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-rw-r--r--src/hotplug-sniffer/hotplug-sniffer.c298
1 files changed, 298 insertions, 0 deletions
diff --git a/src/hotplug-sniffer/hotplug-sniffer.c b/src/hotplug-sniffer/hotplug-sniffer.c
new file mode 100644
index 0000000..fd087fd
--- /dev/null
+++ b/src/hotplug-sniffer/hotplug-sniffer.c
@@ -0,0 +1,298 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+/*
+ * Copyright (C) 2011 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, see <http://www.gnu.org/licenses/>.
+ *
+ * Authors: David Zeuthen <davidz@redhat.com>
+ * Cosimo Cecchi <cosimoc@redhat.com>
+ *
+ */
+
+#include "shell-mime-sniffer.h"
+#include "hotplug-mimetypes.h"
+
+/* Set the environment variable HOTPLUG_SNIFFER_DEBUG to show debug */
+static void print_debug (const gchar *str, ...);
+
+#define BUS_NAME "org.gnome.Shell.HotplugSniffer"
+#define AUTOQUIT_TIMEOUT 5
+
+static const gchar introspection_xml[] =
+ "<node>"
+ " <interface name='org.gnome.Shell.HotplugSniffer'>"
+ " <method name='SniffURI'>"
+ " <arg type='s' name='uri' direction='in'/>"
+ " <arg type='as' name='content_types' direction='out'/>"
+ " </method>"
+ " </interface>"
+ "</node>";
+
+static GDBusNodeInfo *introspection_data = NULL;
+static GMainLoop *loop = NULL;
+static guint autoquit_id = 0;
+
+static gboolean
+autoquit_timeout_cb (gpointer _unused)
+{
+ print_debug ("Timeout reached, quitting...");
+
+ autoquit_id = 0;
+ g_main_loop_quit (loop);
+
+ return FALSE;
+}
+
+static void
+ensure_autoquit_off (void)
+{
+ if (g_getenv ("HOTPLUG_SNIFFER_PERSIST") != NULL)
+ return;
+
+ g_clear_handle_id (&autoquit_id, g_source_remove);
+}
+
+static void
+ensure_autoquit_on (void)
+{
+ if (g_getenv ("HOTPLUG_SNIFFER_PERSIST") != NULL)
+ return;
+
+ autoquit_id =
+ g_timeout_add_seconds (AUTOQUIT_TIMEOUT,
+ autoquit_timeout_cb, NULL);
+ g_source_set_name_by_id (autoquit_id, "[gnome-shell] autoquit_timeout_cb");
+}
+
+typedef struct {
+ GVariant *parameters;
+ GDBusMethodInvocation *invocation;
+} InvocationData;
+
+static InvocationData *
+invocation_data_new (GVariant *params,
+ GDBusMethodInvocation *invocation)
+{
+ InvocationData *ret;
+
+ ret = g_slice_new0 (InvocationData);
+ ret->parameters = g_variant_ref (params);
+ ret->invocation = g_object_ref (invocation);
+
+ return ret;
+}
+
+static void
+invocation_data_free (InvocationData *data)
+{
+ g_variant_unref (data->parameters);
+ g_clear_object (&data->invocation);
+
+ g_slice_free (InvocationData, data);
+}
+
+static void
+sniff_async_ready_cb (GObject *source,
+ GAsyncResult *res,
+ gpointer user_data)
+{
+ InvocationData *data = user_data;
+ gchar **types;
+ GError *error = NULL;
+
+ types = shell_mime_sniffer_sniff_finish (SHELL_MIME_SNIFFER (source),
+ res, &error);
+
+ if (error != NULL)
+ {
+ g_dbus_method_invocation_return_gerror (data->invocation, error);
+ g_error_free (error);
+ goto out;
+ }
+
+ g_dbus_method_invocation_return_value (data->invocation,
+ g_variant_new ("(^as)", types));
+ g_strfreev (types);
+
+ out:
+ invocation_data_free (data);
+ ensure_autoquit_on ();
+}
+
+static void
+handle_sniff_uri (InvocationData *data)
+{
+ ShellMimeSniffer *sniffer;
+ const gchar *uri;
+ GFile *file;
+
+ ensure_autoquit_off ();
+
+ g_variant_get (data->parameters,
+ "(&s)", &uri,
+ NULL);
+ file = g_file_new_for_uri (uri);
+
+ print_debug ("Initiating sniff for uri %s", uri);
+
+ sniffer = shell_mime_sniffer_new (file);
+ shell_mime_sniffer_sniff_async (sniffer,
+ sniff_async_ready_cb,
+ data);
+
+ g_object_unref (sniffer);
+ g_object_unref (file);
+}
+
+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)
+{
+ InvocationData *data;
+
+ data = invocation_data_new (parameters, invocation);
+
+ if (g_strcmp0 (method_name, "SniffURI") == 0)
+ handle_sniff_uri (data);
+ else
+ g_assert_not_reached ();
+}
+
+static const GDBusInterfaceVTable interface_vtable =
+{
+ handle_method_call,
+ NULL, /* get_property */
+ NULL, /* set_property */
+};
+
+static void
+on_bus_acquired (GDBusConnection *connection,
+ const gchar *name,
+ gpointer user_data)
+{
+ GError *error = NULL;
+
+ print_debug ("Connected to the session bus: %s", name);
+
+ g_dbus_connection_register_object (connection,
+ "/org/gnome/Shell/HotplugSniffer",
+ introspection_data->interfaces[0],
+ &interface_vtable,
+ NULL,
+ NULL,
+ &error);
+
+ if (error != NULL)
+ {
+ g_printerr ("Error exporting object on the session bus: %s",
+ error->message);
+ g_error_free (error);
+
+ _exit(1);
+ }
+
+ print_debug ("Object exported on the session bus");
+}
+
+static void
+on_name_lost (GDBusConnection *connection,
+ const gchar *name,
+ gpointer user_data)
+{
+ print_debug ("Lost bus name: %s, exiting", name);
+
+ g_main_loop_quit (loop);
+}
+
+static void
+on_name_acquired (GDBusConnection *connection,
+ const gchar *name,
+ gpointer user_data)
+{
+ print_debug ("Acquired bus name: %s", name);
+}
+
+int
+main (int argc,
+ char **argv)
+{
+ guint name_owner_id;
+
+ introspection_data = g_dbus_node_info_new_for_xml (introspection_xml, NULL);
+ g_assert (introspection_data != NULL);
+
+ ensure_autoquit_on ();
+ loop = g_main_loop_new (NULL, FALSE);
+
+ name_owner_id = g_bus_own_name (G_BUS_TYPE_SESSION,
+ BUS_NAME, 0,
+ on_bus_acquired,
+ on_name_acquired,
+ on_name_lost,
+ NULL,
+ NULL);
+
+ g_main_loop_run (loop);
+
+ if (name_owner_id != 0)
+ g_bus_unown_name (name_owner_id);
+
+ if (loop != NULL)
+ g_main_loop_unref (loop);
+
+ return 0;
+}
+
+/* ---------------------------------------------------------------------------------------------------- */
+
+static void __attribute__((format(printf, 1, 0)))
+print_debug (const gchar *format, ...)
+{
+ g_autofree char *s = NULL;
+ g_autofree char *timestamp = NULL;
+ va_list ap;
+ g_autoptr (GDateTime) now = NULL;
+ static volatile gsize once_init_value = 0;
+ static gboolean show_debug = FALSE;
+ static guint pid = 0;
+
+ if (g_once_init_enter (&once_init_value))
+ {
+ show_debug = (g_getenv ("HOTPLUG_SNIFFER_DEBUG") != NULL);
+ pid = getpid ();
+ g_once_init_leave (&once_init_value, 1);
+ }
+
+ if (!show_debug)
+ goto out;
+
+ now = g_date_time_new_now_local ();
+ timestamp = g_date_time_format (now, "%H:%M:%S");
+
+ va_start (ap, format);
+ s = g_strdup_vprintf (format, ap);
+ va_end (ap);
+
+ g_print ("gnome-shell-hotplug-sniffer[%d]: %s.%03d: %s\n",
+ pid, timestamp, g_date_time_get_microsecond (now), s);
+ out:
+ ;
+}
+
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