sd_bus_set_sender, sd_bus_get_sender - Configure default sender for outgoing
int sd_bus_set_sender(sd_bus *bus,
const char* name);
int sd_bus_get_sender(sd_bus *bus,
const char** name);
sd_bus_set_sender() configures the default sender service name to use for
outgoing messages. The service name specified in the name parameter is
set on all outgoing messages that are sent on the connection and have no
sender set yet, for example through sd_bus_message_set_sender(3). Note
that this function is only supported on direct connections, i.e. not on
connections to a bus broker as the broker will fill in the sender service name
automatically anyway. By default no sender name is configured, and hence
messages are sent without sender field set. If the name parameter is
specified as NULL the default sender service name is cleared, returning
to the default state if a default sender service name was set before. If
passed as non-NULL the specified name must be a valid unique or
well-known service name.
sd_bus_get_sender() may be used to query the current
default service name for outgoing messages.
On success, these functions return 0 or a positive integer. On failure, they
return a negative errno-style error code.
Returned errors may indicate the following problems:
The bus connection has been created in a different
The specified bus connection object is a not a direct but
a brokered connection.
These APIs are implemented as a shared library, which can be compiled and linked
to with the libsystemd pkg-config(1) file.