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GDBus: Add support for D-Bus type 'h' (ie. G_VARIANT_TYPE_HANDLE)

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This allows sending and receiving D-Bus messages with instances of the
'h' D-Bus type. Unlike libdbus-1's dbus_message_iter_get_basic()
method, g_variant_get_handle() does not return a duplicated unix file
descriptor (that must be closed with close(2)) - instead, it returns
an index that can be used to get/dup the file descriptor from a
GUnixFDList object that can be obtained from the GDBusMessage object.

Signed-off-by: David Zeuthen <davidz@redhat.com>
This commit is contained in:
David Zeuthen 2010-07-20 11:38:23 -04:00
parent 66388120d2
commit 2be167f57c
2 changed files with 50 additions and 0 deletions
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22
gio/gdbusmessage.c
View File

@ -1006,6 +1006,19 @@ parse_value_from_blob (GMemoryInputStream *mis,
g_free (v); g_free (v);
} }
} }
else if (g_variant_type_equal (type, G_VARIANT_TYPE_HANDLE))
{
if (!ensure_input_padding (mis, 4, &local_error))
goto fail;
if (!just_align)
{
gint32 v;
v = g_data_input_stream_read_int32 (dis, NULL, &local_error);
if (local_error != NULL)
goto fail;
ret = g_variant_new_handle (v);
}
}
else if (g_variant_type_is_array (type)) else if (g_variant_type_is_array (type))
{ {
guint32 array_len; guint32 array_len;
@ -1701,6 +1714,15 @@ append_value_to_blob (GVariant *value,
g_data_output_stream_put_byte (dos, '\0', NULL, NULL); g_data_output_stream_put_byte (dos, '\0', NULL, NULL);
} }
} }
else if (g_variant_type_equal (type, G_VARIANT_TYPE_HANDLE))
{
padding_added = ensure_output_padding (mos, dos, 4);
if (value != NULL)
{
gint32 v = g_variant_get_handle (value);
g_data_output_stream_put_int32 (dos, v, NULL, NULL);
}
}
else if (g_variant_type_is_array (type)) else if (g_variant_type_is_array (type))
{ {
GVariant *item; GVariant *item;

28
gio/tests/gdbus-serialization.c
View File

@ -405,6 +405,18 @@ dbus_1_message_append (GString *s,
break; break;
} }
#ifdef DBUS_TYPE_UNIX_FD
case DBUS_TYPE_UNIX_FD:
{
/* unfortunately there's currently no way to get just the
* protocol value, since dbus_message_iter_get_basic() wants
* to be 'helpful' and dup the fd for the user...
*/
g_string_append (s, "unix-fd: (not extracted)\n");
break;
}
#endif
case DBUS_TYPE_VARIANT: case DBUS_TYPE_VARIANT:
g_string_append_printf (s, "variant:\n"); g_string_append_printf (s, "variant:\n");
dbus_message_iter_recurse (iter, &sub); dbus_message_iter_recurse (iter, &sub);
@ -672,6 +684,22 @@ message_serialize_complex (void)
" string: `cwd'\n" " string: `cwd'\n"
" variant:\n" " variant:\n"
" string: `/home/davidz/Hacking/glib/gio/tests'\n"); " string: `/home/davidz/Hacking/glib/gio/tests'\n");
#ifdef DBUS_TYPE_UNIX_FD
value = g_variant_parse (G_VARIANT_TYPE ("(hah)"),
"(42, [43, 44])",
NULL, NULL, &error);
g_assert_no_error (error);
g_assert (value != NULL);
/* about (not extracted), see comment in DBUS_TYPE_UNIX_FD case in
* dbus_1_message_append() above.
*/
check_serialization (value,
"value 0: unix-fd: (not extracted)\n"
"value 1: array:\n"
" unix-fd: (not extracted)\n"
" unix-fd: (not extracted)\n");
#endif
} }