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()
.
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:
-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.
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.