sd_bus_set_sender

systemd
sd_bus_set_sender 3
sd_bus_set_sender sd_bus_get_sender Configure default sender for outgoing messages

    #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.

`-EPERM`

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

## See Also

systemd 1, sd-bus 3, sd_bus_message_set_sender 3