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)