sd_bus_reply_method

Name

sd_bus_reply_method_return, sd_bus_reply_method_returnv — Reply to a D-Bus method call

Synopsis

#include <systemd/sd-bus.h>

`int sd_bus_reply_method_return(`	sd_bus_message *`call`,
	const char *`types`,
	...`)`;

`int sd_bus_reply_method_returnv(`	sd_bus_message *`call`,
	const char *`types`,
	va_list `ap)`;

Description¶

sd_bus_reply_method_return() sends a reply to the call message. The type string types and the arguments that follow it must adhere to the format described in sd_bus_message_append(3). If no reply is expected to call, this function succeeds without sending a reply.

Return Value¶

On success, this function returns a non-negative integer. On failure, it returns a negative errno-style error code.

Errors¶

Returned errors may indicate the following problems:

-EINVAL¶

The input parameter call is NULL.

Message call is not a method call message.

Message call is not attached to a bus.

Message m is not a method reply message.

-EPERM¶

Message call has been sealed.

-ENOTCONN¶

The bus to which message call is attached is not connected.

-ENOMEM¶

Memory allocation failed.

In addition, any error returned by sd_bus_send(1) may be returned.

Notes¶

Functions described here are available as a shared library, which can be compiled against and linked to with the libsystemd pkg-config(1) file.

The code described here uses getenv(3), which is declared to be not multi-thread-safe. This means that the code calling the functions described here must not call setenv(3) from a parallel thread. It is recommended to only do calls to setenv() from an early phase of the program when no other threads have been started.