zbus::blocking::fdo

Struct InterfacesAdded

pub struct InterfacesAdded(/* private fields */);

Expand description

A InterfacesAdded signal.

Implementations§

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impl InterfacesAdded

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pub fn from_message<M>(msg: M) -> Option<Self>
where M: Into<Arc<Message>>,

Try to construct a InterfacesAdded from a ::zbus::Message.

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Methods from Deref<Target = Message>§

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pub fn take_fds(&self) -> Vec<OwnedFd>

Take ownership of the associated file descriptors in the message.

When a message is received over a AF_UNIX socket, it may contain associated FDs. To prevent the message from closing those FDs on drop, call this method that returns all the received FDs with their ownership.

This function is Unix-specific.

Note: the message will continue to reference the files, so you must keep them open for as long as the message itself.

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pub fn body_signature(&self) -> Result<Signature<'_>>

The signature of the body.

Note: While zbus treats multiple arguments as a struct (to allow you to use the tuple syntax), D-Bus does not. Since this method gives you the signature expected on the wire by D-Bus, the trailing and leading STRUCT signature parenthesis will not be present in case of multiple arguments.

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pub fn primary_header(&self) -> &MessagePrimaryHeader

Deserialize the header.

Note: prefer using the direct access methods if possible; they are more efficient.

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pub fn fields(&self) -> Result<MessageFields<'_>>

Deserialize the fields.

Note: prefer using the direct access methods if possible; they are more efficient.

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pub fn message_type(&self) -> MessageType

The message type.

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pub fn path(&self) -> Option<ObjectPath<'_>>

The object to send a call to, or the object a signal is emitted from.

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pub fn interface(&self) -> Option<InterfaceName<'_>>

The interface to invoke a method call on, or that a signal is emitted from.

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pub fn member(&self) -> Option<MemberName<'_>>

The member, either the method name or signal name.

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pub fn reply_serial(&self) -> Option<u32>

The serial number of the message this message is a reply to.

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pub fn body_unchecked<'d, 'm: 'd, B>(&'m self) -> Result
where B: Deserialize<'d> + Type,

Deserialize the body (without checking signature matching).

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pub fn body<'d, 'm: 'd, B>(&'m self) -> Result
where B: DynamicDeserialize<'d>,

Deserialize the body using the contained signature.

§Example

let send_body = (7i32, (2i32, "foo"), vec!["bar"]);
let message = Message::method(None::<&str>, Some("zbus.test"), "/", Some("zbus.test"), "ping", &send_body)?;
let body : zbus::zvariant::Structure = message.body()?;
let fields = body.fields();
assert!(matches!(fields[0], zvariant::Value::I32(7)));
assert!(matches!(fields[1], zvariant::Value::Structure(_)));
assert!(matches!(fields[2], zvariant::Value::Array(_)));

let reply_msg = Message::method_reply(None::<&str>, &message, &body)?;
let reply_value : (i32, (i32, &str), Vec<String>) = reply_msg.body()?;

assert_eq!(reply_value.0, 7);
assert_eq!(reply_value.2.len(), 1);

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pub fn as_bytes(&self) -> &[u8] ⓘ

Get a reference to the byte encoding of the message.

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pub fn body_as_bytes(&self) -> Result<&[u8]>

Get a reference to the byte encoding of the body of the message.

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pub fn recv_position(&self) -> MessageSequence

Get the receive ordering of a message.

This may be used to identify how two events were ordered on the bus. It only produces a useful ordering for messages that were produced by the same zbus::Connection.

This is completely unrelated to the serial number on the message, which is set by the peer and might not be ordered at all.