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

#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);

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.

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

Returned errors may indicate the following problems:


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.


Message call has been sealed.


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


Memory allocation failed.

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

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.

systemd(1), sd-bus(3), sd_bus_message_new_method_return(3)

systemd 254