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GDBus: add 'monitor' verb to gdbus(1)

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This uncovered a bug in name watching if the name wasn't activatable.

Also provoked the need for on_connection variants of g_bus_watch_name
(added g_bus_watch_proxy's variant as well).
This commit is contained in:
David Zeuthen 2010-05-12 23:12:14 -04:00
parent 9695c23d4c
commit ea1e0496b0
8 changed files with 489 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
docs/reference/gio/gdbus.xml
View File

@ -23,6 +23,19 @@
<arg choice="plain">--dest <replaceable>bus_name</replaceable></arg>
<arg choice="plain">--object-path <replaceable>/path/to/object</replaceable></arg>
</cmdsynopsis>
<cmdsynopsis>
<command>gdbus</command>
<arg choice="plain">monitor</arg>
<group>
<arg choice="plain">--system</arg>
<arg choice="plain">--session</arg>
<arg choice="plain">--address <replaceable>address</replaceable></arg>
</group>
<arg choice="plain">--dest <replaceable>bus_name</replaceable></arg>
<group>
<arg choice="plain">--object-path <replaceable>/path/to/object</replaceable></arg>
</group>
</cmdsynopsis>
<cmdsynopsis>
<command>gdbus</command>
<arg choice="plain">call</arg>
@ -60,6 +73,13 @@
<literal>org.freedesktop.DBus.Introspectable</literal> interface.
</para></listitem>
</varlistentry>
<varlistentry>
<term><option>monitor</option></term>
<listitem><para>
Monitors one or all objects owned by the owned of
<replaceable>bus_name</replaceable>.
</para></listitem>
</varlistentry>
<varlistentry>
<term><option>call</option></term>
<listitem><para>
@ -189,6 +209,29 @@ $ gdbus call --session \
5000
(uint32 12,)
</programlisting>
<para>
Monitoring all objects on a service:
</para>
<programlisting>
$ gdbus monitor --system --dest org.freedesktop.ConsoleKit
Monitoring signals from all objects owned by org.freedesktop.ConsoleKit
The name org.freedesktop.ConsoleKit is owned by :1.15
/org/freedesktop/ConsoleKit/Session2: org.freedesktop.ConsoleKit.Session.ActiveChanged (false,)
/org/freedesktop/ConsoleKit/Seat1: org.freedesktop.ConsoleKit.Seat.ActiveSessionChanged ('',)
/org/freedesktop/ConsoleKit/Session2: org.freedesktop.ConsoleKit.Session.ActiveChanged (true,)
/org/freedesktop/ConsoleKit/Seat1: org.freedesktop.ConsoleKit.Seat.ActiveSessionChanged ('/org/freedesktop/ConsoleKit/Session2',)
</programlisting>
<para>
Monitoring a single object on a service:
</para>
<programlisting>
$ gdbus monitor --system --dest org.freedesktop.ConsoleKit --object-path /org/freedesktop/ConsoleKit/Session2
Monitoring signals on object /org/freedesktop/ConsoleKit/Session2 owned by org.freedesktop.ConsoleKit
The name org.freedesktop.ConsoleKit is owned by :1.15
/org/freedesktop/ConsoleKit/Session2: org.freedesktop.ConsoleKit.Session.ActiveChanged (false,)
/org/freedesktop/ConsoleKit/Session2: org.freedesktop.ConsoleKit.Session.ActiveChanged (true,)
</programlisting>
</refsect1>
<refsect1>

2
docs/reference/gio/gio-sections.txt
View File

@ -2446,6 +2446,7 @@ GBusNameAppearedCallback
GBusNameVanishedCallback
GBusNameWatcherFlags
g_bus_watch_name
g_bus_watch_name_on_connection
g_bus_unwatch_name
</SECTION>
@ -2454,6 +2455,7 @@ g_bus_unwatch_name
GBusProxyAppearedCallback
GBusProxyVanishedCallback
g_bus_watch_proxy
g_bus_watch_proxy_on_connection
g_bus_unwatch_proxy
</SECTION>

253
gio/gdbus-tool.c
View File

@ -92,6 +92,7 @@ usage (gint *argc, gchar **argv[], gboolean use_stdout)
s = g_strdup_printf (_("Commands:\n"
" help Shows this information\n"
" introspect Introspect a remote object\n"
" monitor Monitor a remote object\n"
" call Invoke a method on a remote object\n"
"\n"
"Use \"%s COMMAND --help\" to get help on each command.\n"),
@ -1380,6 +1381,246 @@ handle_introspect (gint *argc,
/* ---------------------------------------------------------------------------------------------------- */
static gchar *opt_monitor_dest = NULL;
static gchar *opt_monitor_object_path = NULL;
static guint monitor_filter_id = 0;
static void
monitor_signal_cb (GDBusConnection *connection,
const gchar *sender_name,
const gchar *object_path,
const gchar *interface_name,
const gchar *signal_name,
GVariant *parameters,
gpointer user_data)
{
gchar *s;
s = g_variant_print (parameters, TRUE);
g_print ("%s: %s.%s %s\n",
object_path,
interface_name,
signal_name,
s);
g_free (s);
}
static void
monitor_on_name_appeared (GDBusConnection *connection,
const gchar *name,
const gchar *name_owner,
gpointer user_data)
{
g_print ("The name %s is owned by %s\n", name, name_owner);
g_assert (monitor_filter_id == 0);
monitor_filter_id = g_dbus_connection_signal_subscribe (connection,
name_owner,
NULL, /* any interface */
NULL, /* any member */
opt_monitor_object_path,
NULL, /* arg0 */
monitor_signal_cb,
NULL, /* user_data */
NULL); /* user_data destroy notify */
}
static void
monitor_on_name_vanished (GDBusConnection *connection,
const gchar *name,
gpointer user_data)
{
g_print ("The name %s does not have an owner\n", name);
if (monitor_filter_id != 0)
{
g_dbus_connection_signal_unsubscribe (connection, monitor_filter_id);
monitor_filter_id = 0;
}
}
static const GOptionEntry monitor_entries[] =
{
{ "dest", 'd', 0, G_OPTION_ARG_STRING, &opt_monitor_dest, N_("Destination name to monitor"), NULL},
{ "object-path", 'o', 0, G_OPTION_ARG_STRING, &opt_monitor_object_path, N_("Object path to monitor"), NULL},
{ NULL }
};
static gboolean
handle_monitor (gint *argc,
gchar **argv[],
gboolean request_completion,
const gchar *completion_cur,
const gchar *completion_prev)
{
gint ret;
GOptionContext *o;
gchar *s;
GError *error;
GDBusConnection *c;
GVariant *result;
GDBusNodeInfo *node;
gboolean complete_names;
gboolean complete_paths;
GMainLoop *loop;
ret = FALSE;
c = NULL;
node = NULL;
result = NULL;
modify_argv0_for_command (argc, argv, "monitor");
o = g_option_context_new (NULL);
if (request_completion)
g_option_context_set_ignore_unknown_options (o, TRUE);
g_option_context_set_help_enabled (o, FALSE);
g_option_context_set_summary (o, _("Monitor a remote object."));
g_option_context_add_main_entries (o, monitor_entries, NULL /* GETTEXT_PACKAGE*/);
g_option_context_add_group (o, connection_get_group ());
complete_names = FALSE;
if (request_completion && *argc > 1 && g_strcmp0 ((*argv)[(*argc)-1], "--dest") == 0)
{
complete_names = TRUE;
remove_arg ((*argc) - 1, argc, argv);
}
complete_paths = FALSE;
if (request_completion && *argc > 1 && g_strcmp0 ((*argv)[(*argc)-1], "--object-path") == 0)
{
complete_paths = TRUE;
remove_arg ((*argc) - 1, argc, argv);
}
if (!g_option_context_parse (o, argc, argv, NULL))
{
if (!request_completion)
{
s = g_option_context_get_help (o, FALSE, NULL);
g_printerr ("%s", s);
g_free (s);
goto out;
}
}
error = NULL;
c = connection_get_dbus_connection (&error);
if (c == NULL)
{
if (request_completion)
{
if (g_strcmp0 (completion_prev, "--address") == 0)
{
g_print ("unix:\n"
"tcp:\n"
"nonce-tcp:\n");
}
else
{
g_print ("--system \n--session \n--address \n");
}
}
else
{
g_printerr (_("Error connecting: %s\n"), error->message);
g_error_free (error);
}
goto out;
}
if (g_dbus_connection_get_unique_name (c) != NULL)
{
if (complete_names)
{
print_names (c, FALSE);
goto out;
}
/* this only makes sense on message bus connections */
if (opt_monitor_dest == NULL)
{
if (request_completion)
g_print ("--dest \n");
else
g_printerr (_("Error: Destination is not specified\n"));
goto out;
}
if (request_completion && g_strcmp0 ("--dest", completion_prev) == 0)
{
print_names (c, g_str_has_prefix (opt_monitor_dest, ":"));
goto out;
}
}
if (complete_paths)
{
print_paths (c, opt_monitor_dest, "/");
goto out;
}
if (opt_monitor_object_path == NULL)
{
if (request_completion)
{
g_print ("--object-path \n");
goto out;
}
/* it's fine to not have an object path */
}
if (request_completion && g_strcmp0 ("--object-path", completion_prev) == 0)
{
gchar *p;
s = g_strdup (opt_monitor_object_path);
p = strrchr (s, '/');
if (p != NULL)
{
if (p == s)
p++;
*p = '\0';
}
print_paths (c, opt_monitor_dest, s);
g_free (s);
goto out;
}
if (!request_completion && (opt_monitor_object_path != NULL && !g_variant_is_object_path (opt_monitor_object_path)))
{
g_printerr (_("Error: %s is not a valid object path\n"), opt_monitor_object_path);
goto out;
}
/* All done with completion now */
if (request_completion)
goto out;
if (opt_monitor_object_path != NULL)
g_print ("Monitoring signals on object %s owned by %s\n", opt_monitor_object_path, opt_monitor_dest);
else
g_print ("Monitoring signals from all objects owned by %s\n", opt_monitor_dest);
loop = g_main_loop_new (NULL, FALSE);
g_bus_watch_name_on_connection (c,
opt_monitor_dest,
G_BUS_NAME_WATCHER_FLAGS_AUTO_START,
monitor_on_name_appeared,
monitor_on_name_vanished,
NULL,
NULL);
g_main_loop_run (loop);
g_main_loop_unref (loop);
ret = TRUE;
out:
if (node != NULL)
g_dbus_node_info_unref (node);
if (result != NULL)
g_variant_unref (result);
if (c != NULL)
g_object_unref (c);
g_option_context_free (o);
return ret;
}
/* ---------------------------------------------------------------------------------------------------- */
static gchar *
pick_word_at (const gchar *s,
gint cursor,
@ -1476,6 +1717,16 @@ main (gint argc, gchar *argv[])
ret = 0;
goto out;
}
else if (g_strcmp0 (command, "monitor") == 0)
{
if (handle_monitor (&argc,
&argv,
request_completion,
completion_cur,
completion_prev))
ret = 0;
goto out;
}
else if (g_strcmp0 (command, "complete") == 0 && argc == 4 && !request_completion)
{
const gchar *completion_line;
@ -1545,7 +1796,7 @@ main (gint argc, gchar *argv[])
{
if (request_completion)
{
g_print ("help \ncall \nintrospect \n");
g_print ("help \ncall \nintrospect \nmonitor \n");
ret = 0;
goto out;
}

69
gio/gdbusnamewatching.c
View File

@ -417,10 +417,11 @@ start_service_by_name_cb (GObject *source_object,
* org.freedesktop.DBus.Error.ServiceUnknown: The name org.gnome.Epiphany2
* was not provided by any .service files
*
* so just report vanished.
* This doesn't mean that the name doesn't have an owner, just
* that it's not provided by a .service file. So proceed to
* invoke GetNameOwner().
*/
call_vanished_handler (client, FALSE);
client->initialized = TRUE;
invoke_get_name_owner (client);
}
if (result != NULL)
@ -586,6 +587,68 @@ g_bus_watch_name (GBusType bus_type,
return client->id;
}
/**
* g_bus_watch_name_on_connection:
* @connection: A #GDBusConnection that is not closed.
* @name: The name (well-known or unique) to watch.
* @flags: Flags from the #GBusNameWatcherFlags enumeration.
* @name_appeared_handler: Handler to invoke when @name is known to exist or %NULL.
* @name_vanished_handler: Handler to invoke when @name is known to not exist or %NULL.
* @user_data: User data to pass to handlers.
* @user_data_free_func: Function for freeing @user_data or %NULL.
*
* Like g_bus_watch_name() but takes a #GDBusConnection instead of a
* #GBusType.
*
* Returns: An identifier (never 0) that an be used with
* g_bus_unwatch_name() to stop watching the name.
*
* Since: 2.26
*/
guint g_bus_watch_name_on_connection (GDBusConnection *connection,
const gchar *name,
GBusNameWatcherFlags flags,
GBusNameAppearedCallback name_appeared_handler,
GBusNameVanishedCallback name_vanished_handler,
gpointer user_data,
GDestroyNotify user_data_free_func)
{
Client *client;
g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), 0);
g_return_val_if_fail (g_dbus_is_name (name), 0);
G_LOCK (lock);
client = g_new0 (Client, 1);
client->ref_count = 1;
client->id = next_global_id++; /* TODO: uh oh, handle overflow */
client->name = g_strdup (name);
client->flags = flags;
client->name_appeared_handler = name_appeared_handler;
client->name_vanished_handler = name_vanished_handler;
client->user_data = user_data;
client->user_data_free_func = user_data_free_func;
client->main_context = g_main_context_get_thread_default ();
if (client->main_context != NULL)
g_main_context_ref (client->main_context);
if (map_id_to_client == NULL)
{
map_id_to_client = g_hash_table_new (g_direct_hash, g_direct_equal);
}
g_hash_table_insert (map_id_to_client,
GUINT_TO_POINTER (client->id),
client);
client->connection = g_object_ref (connection);
G_UNLOCK (lock);
has_connection (client);
return client->id;
}
/**
* g_bus_unwatch_name:
* @watcher_id: An identifier obtained from g_bus_watch_name()

7
gio/gdbusnamewatching.h
View File

@ -65,6 +65,13 @@ guint g_bus_watch_name (GBusType bus_type,
GBusNameVanishedCallback name_vanished_handler,
gpointer user_data,
GDestroyNotify user_data_free_func);
guint g_bus_watch_name_on_connection (GDBusConnection *connection,
const gchar *name,
GBusNameWatcherFlags flags,
GBusNameAppearedCallback name_appeared_handler,
GBusNameVanishedCallback name_vanished_handler,
gpointer user_data,
GDestroyNotify user_data_free_func);
void g_bus_unwatch_name (guint watcher_id);
G_END_DECLS

86
gio/gdbusproxywatching.c
View File

@ -25,6 +25,7 @@
#include <stdlib.h>
#include "gdbusutils.h"
#include "gdbusconnection.h"
#include "gdbusnamewatching.h"
#include "gdbusproxywatching.h"
#include "gdbuserror.h"
@ -362,6 +363,91 @@ g_bus_watch_proxy (GBusType bus_type,
return client->id;
}
/**
* g_bus_watch_proxy_on_connection:
* @connection: A #GDBusConnection that is not closed.
* @name: The name (well-known or unique) to watch.
* @flags: Flags from the #GBusNameWatcherFlags enumeration.
* @object_path: The object path of the remote object to watch.
* @interface_name: The D-Bus interface name for the proxy.
* @interface_type: The #GType for the kind of proxy to create. This must be a #GDBusProxy derived type.
* @proxy_flags: Flags from #GDBusProxyFlags to use when constructing the proxy.
* @proxy_appeared_handler: Handler to invoke when @name is known to exist and the
* requested proxy is available.
* @proxy_vanished_handler: Handler to invoke when @name is known to not exist
* and the previously created proxy is no longer available.
* @user_data: User data to pass to handlers.
* @user_data_free_func: Function for freeing @user_data or %NULL.
*
* Like g_bus_watch_proxy() but takes a #GDBusConnection instead of a
* #GBusType.
*
* Returns: An identifier (never 0) that can be used with
* g_bus_unwatch_proxy() to stop watching the remote object.
*
* Since: 2.26
*/
guint
g_bus_watch_proxy_on_connection (GDBusConnection *connection,
const gchar *name,
GBusNameWatcherFlags flags,
const gchar *object_path,
const gchar *interface_name,
GType interface_type,
GDBusProxyFlags proxy_flags,
GBusProxyAppearedCallback proxy_appeared_handler,
GBusProxyVanishedCallback proxy_vanished_handler,
gpointer user_data,
GDestroyNotify user_data_free_func)
{
Client *client;
g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), 0);
g_return_val_if_fail (g_dbus_is_name (name), 0);
g_return_val_if_fail (g_variant_is_object_path (object_path), 0);
g_return_val_if_fail (g_dbus_is_interface_name (interface_name), 0);
g_return_val_if_fail (g_type_is_a (interface_type, G_TYPE_DBUS_PROXY), 0);
G_LOCK (lock);
client = g_new0 (Client, 1);
client->id = next_global_id++; /* TODO: uh oh, handle overflow */
client->name = g_strdup (name);
client->proxy_appeared_handler = proxy_appeared_handler;
client->proxy_vanished_handler = proxy_vanished_handler;
client->user_data = user_data;
client->user_data_free_func = user_data_free_func;
client->main_context = g_main_context_get_thread_default ();
if (client->main_context != NULL)
g_main_context_ref (client->main_context);
client->name_watcher_id = g_bus_watch_name_on_connection (connection,
name,
flags,
on_name_appeared,
on_name_vanished,
client,
NULL);
client->object_path = g_strdup (object_path);
client->interface_name = g_strdup (interface_name);
client->interface_type = interface_type;
client->proxy_flags = proxy_flags;
client->initial_construction = TRUE;
if (map_id_to_client == NULL)
{
map_id_to_client = g_hash_table_new (g_direct_hash, g_direct_equal);
}
g_hash_table_insert (map_id_to_client,
GUINT_TO_POINTER (client->id),
client);
G_UNLOCK (lock);
return client->id;
}
/**
* g_bus_unwatch_proxy:
* @watcher_id: An identifier obtained from g_bus_watch_proxy()

11
gio/gdbusproxywatching.h
View File

@ -74,6 +74,17 @@ guint g_bus_watch_proxy (GBusType bus_type,
GBusProxyVanishedCallback proxy_vanished_handler,
gpointer user_data,
GDestroyNotify user_data_free_func);
guint g_bus_watch_proxy_on_connection (GDBusConnection *connection,
const gchar *name,
GBusNameWatcherFlags flags,
const gchar *object_path,
const gchar *interface_name,
GType interface_type,
GDBusProxyFlags proxy_flags,
GBusProxyAppearedCallback proxy_appeared_handler,
GBusProxyVanishedCallback proxy_vanished_handler,
gpointer user_data,
GDestroyNotify user_data_free_func);
void g_bus_unwatch_proxy (guint watcher_id);
G_END_DECLS

2
gio/gio.symbols
View File

@ -1652,6 +1652,7 @@ g_bus_unown_name
#if IN_HEADER(__G_DBUS_NAME_WATCHING_H__)
#if IN_FILE(__G_DBUS_NAME_WATCHING_C__)
g_bus_watch_name
g_bus_watch_name_on_connection
g_bus_unwatch_name
#endif
#endif
@ -1683,6 +1684,7 @@ g_dbus_proxy_call_sync
#if IN_HEADER(__G_DBUS_PROXY_WATCHING_H__)
#if IN_FILE(__G_DBUS_PROXY_WATCHING_C__)
g_bus_watch_proxy
g_bus_watch_proxy_on_connection
g_bus_unwatch_proxy
#endif
#endif