NAME

       sd_bus_set_sender, sd_bus_get_sender - Configure default sender for outgoing messages

SYNOPSIS

       #include <systemd/sd-bus.h>

       int sd_bus_set_sender(sd_bus *bus, const char* name);

       int sd_bus_get_sender(sd_bus *bus, const char** name);

DESCRIPTION

       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.

RETURN VALUE

       On success, these functions return 0 or a positive integer. On failure, they return a negative
       errno-style error code.

   Errors
       Returned errors may indicate the following problems:

       -ECHILD
           The bus connection has been created in a different process, library or module instance.

       -EPERM
           The specified bus connection object is a not a direct but a brokered connection.

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.

HISTORY

       sd_bus_set_sender() and sd_bus_get_sender() were added in version 237.

SEE ALSO

       systemd(1), sd-bus(3), sd_bus_message_set_sender(3)