systemd sd_bus_message_set_destination 3 sd_bus_message_set_destination sd_bus_message_set_sender Set the destination or sender service name of a bus message #include <systemd/sd-bus.h> int sd_bus_message_set_destination sd_bus_message *message const char *destination int sd_bus_message_set_sender sd_bus_message *message 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 service name. 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. On success, these calls return 0 or a positive integer. On failure, these calls return a negative errno-style error code. Returned errors may indicate the following problems: -EINVAL A specified parameter is invalid. -EPERM The message is already sealed. -EEXIST The message already has a destination or sender field set. systemd1, sd-bus3, sd_bus_new3, sd_bus_set_sender3