sd_bus_message_set_destination, sd_bus_message_get_destination, sd_bus_message_get_path, sd_bus_message_get_interface, sd_bus_message_get_member, sd_bus_message_set_sender, sd_bus_message_get_sender — Set and query bus message addressing information
|const char *destination|
|const char *sender|
sd_bus_message_set_destination() sets the destination service name
for the specified bus message object. The specified name must be a valid unique or well-known
sd_bus_message_get_member() return the destination, path, interface, and
member fields from
message header. The return value will be
NULL or the
message is of a type that doesn't use those fields or the message doesn't have them set. See
for more discussion of those values.
sd_bus_message_set_sender() sets the sender service name for the specified bus message
object. The specified name must be a valid unique or well-known service name. This function is useful only for
messages to send on direct connections as for connections to bus brokers the broker will fill in the destination
field anyway, and the sender field set by original sender is ignored.
sd_bus_message_get_sender() returns the sender field from
When a string is returned, it is a pointer to internal storage, and may not be modified or
freed. It is only valid as long as the
message remains referenced and
this field hasn't been changed by a different call.
On success, these calls return 0 or a positive integer. On failure, these calls return a negative errno-style error code.
These APIs are implemented as a shared
library, which can be compiled and linked to with the