sd_bus_reply_method_return - Man Page
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.
Added in version 246.
- -EPERM
Message call has been sealed.
Added in version 246.
- -ENOTCONN
The bus to which message call is attached is not connected.
Added in version 246.
- -ENOMEM
Memory allocation failed.
Added in version 246.
In addition, any error returned by sd_bus_send(3) 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.
See Also
Referenced By
sd-bus(3), sd_bus_add_object(3), sd_bus_send(3), systemd.directives(7), systemd.index(7).
The man page sd_bus_reply_method_returnv(3) is an alias of sd_bus_reply_method_return(3).