Index · Directives systemd 250


sd_bus_reply_method_error, sd_bus_reply_method_errorf, sd_bus_reply_method_errorfv, sd_bus_reply_method_errno, sd_bus_reply_method_errnof, sd_bus_reply_method_errnofv — Reply with an error to a D-Bus method call


#include <systemd/sd-bus.h>
int sd_bus_reply_method_error(sd_bus_message *call,
 const sd_bus_error *e);
int sd_bus_reply_method_errorf(sd_bus_message *call,
 const char *name,
 const char *format,
int sd_bus_reply_method_errorfv(sd_bus_message *call,
 const char *name,
 const char *format,
 va_list ap);
int sd_bus_reply_method_errno(sd_bus_message *call,
 int error,
 const sd_bus_error *p);
int sd_bus_reply_method_errnof(sd_bus_message *call,
 int error,
 const char *format,
int sd_bus_reply_method_errnofv(sd_bus_message *call,
 int error,
 const char *format,
 va_list ap);


The sd_bus_reply_method_error() function sends an error reply to the call message. The error structure e specifies the error to send, and is used as described in sd_bus_message_new_method_error(3). If no reply is expected to call, this function succeeds without sending a reply.

The sd_bus_reply_method_errorf() is to sd_bus_reply_method_error() what sd_bus_message_new_method_errorf() is to sd_bus_message_new_method_error().

The sd_bus_reply_method_errno() is to sd_bus_reply_method_error() what sd_bus_message_new_method_errno() is to sd_bus_message_new_method_error().

The sd_bus_reply_method_errnof() is to sd_bus_reply_method_error() what sd_bus_message_new_method_errnof() is to sd_bus_message_new_method_error().

Return Value

This function returns a non-negative integer if the error reply was successfully sent or if call does not expect a reply. 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.

The error parameter e to sd_bus_reply_method_error() is not set, see sd_bus_error_is_set(3).


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.


These APIs are implemented as a shared library, which can be compiled and linked to with the libsystemd pkg-config(1) file.

See Also

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