ответить с ошибкой на вызов метода D-Bus (reply with an error to a D-Bus method call)
Имя (Name)
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
Синопсис (Synopsis)
#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);
Описание (Description)
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().
Возвращаемое значение (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.
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.
The error parameter e to sd_bus_reply_method_error() is not
set, see sd_bus_error_is_set(3).
-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.
Примечание (Note)
These APIs are implemented as a shared library, which can be
compiled and linked to with the libsystemd pkg-config(1) file.
Смотри также (See also)
systemd(1), sd-bus(3), sd_bus_message_new_method_error(3)
