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config: Return errors as negative numbers, device ids as positive numbers. 

Update dbus-api documentation.
This commit is contained in:
Peter Hutterer 2007-04-19 12:00:24 +09:30
parent ae75afcb1b
commit 9c30f74221
2 changed files with 12 additions and 11 deletions
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3
config/config.c
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@ -308,12 +308,15 @@ configMessage(DBusConnection *connection, DBusMessage *message, void *closure)
if (ret != BadDrawable && ret != BadAlloc) {
if (!strlen(dbus_message_get_signature(reply)))
{
ret = -ret; /* return errors as negative numbers */
if (!dbus_message_iter_append_basic(&r_iter, DBUS_TYPE_INT32, &ret)) {
ErrorF("[config] couldn't append to iterator\n");
dbus_message_unref(reply);
dbus_error_free(&error);
return DBUS_HANDLER_RESULT_HANDLED;
}
}
if (!dbus_connection_send(bus, reply, NULL))
ErrorF("[config] failed to send reply\n");

20
config/dbus-api
View File

@ -15,25 +15,23 @@ org.x.config.input:
Option names beginning with _ are not allowed; they are reserved
for internal use.
Returns one int32, which is an X Status, as defined in X.h. If
everything is successful, Success will be returned. BadMatch will
be returned if the options given do not match any device. BadValue
is returned for a malformed message.
Returns one signed int32, which is the device id of the new device.
If the return value is a negative number, it represents the X
Status, as defined in X.h. BadMatch will be returned if the options
given do not match any device. BadValue is returned for a malformed
message. (Example: 8 is new device id 8. -8 is BadMatch.)
Notably, BadAlloc is never returned: the server internally signals
to D-BUS that the attempt failed for lack of memory.
The return does not notify the client of which devices were created
or modified as a result of this request: clients are encouraged to
listen for the XInput DevicePresenceNotify event to monitor changes
in the device list.
org.x.config.input.remove:
Takes one int32 argument, which is the device ID to remove, i.e.:
i
is the signature.
Same return values as org.x.config.input.add.
Returns one signed int32 which represents an X status as defined in
X.h. See org.x.config.input.add. Error codes are negative numbers.
org.x.config.input.listDevices:
Lists the currently active devices.
Lists the currently active devices. No argument.
Return value is sequence of <id> <name> <id> <name> ...