SD_BUS_MESSAGE_SET_DESTIsd_bus_message_set_deSD_BUS_MESSAGE_SET_DESTINATION(3)

NAME
       sd_bus_message_set_destination, sd_bus_message_get_destination,
       sd_bus_message_get_path, sd_bus_message_get_interface,
       sd_bus_message_get_member, sd_bus_message_set_sender,
       sd_bus_message_get_sender - Set and query bus message addressing
       information

SYNOPSIS
       #include <systemd/sd-bus.h>

       int sd_bus_message_set_destination(sd_bus_message *message,
                                          const char *destination);

       const char* sd_bus_message_get_destination(sd_bus_message *message);

       const char* sd_bus_message_get_path(sd_bus_message *message);

       const char* sd_bus_message_get_interface(sd_bus_message *message);

       const char* sd_bus_message_get_member(sd_bus_message *message);

       int sd_bus_message_set_sender(sd_bus_message *message,
                                     const char *sender);

       const char* sd_bus_message_get_sender(sd_bus_message *message);

DESCRIPTION
       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_get_destination(), sd_bus_message_get_path(),
       sd_bus_message_get_interface(), and sd_bus_message_get_member() return
       the destination, path, interface, and member fields from message
       header. The return value will be NULL is message is NULL or the message
       is of a type that doesn't use those fields or the message doesn't have
       them set. See sd_bus_message_new_method_call(3) and
       sd_bus_message_set_destination(3) for more discussion of those values.

       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.

       sd_bus_message_get_sender() returns the sender field from message.

       When a string is returned, it is a pointer to internal storage, and may
       not be modified or freed. It is only valid as long as the message
       remains referenced and this field hasn't been changed by a different
       call.

RETURN VALUE
       On success, these calls return 0 or a positive integer. On failure,
       these calls return a negative errno-style error code.

   Errors
       Returned errors may indicate the following problems:

       -EINVAL
           The message parameter or the output parameter are NULL.

       -EPERM
           For sd_bus_message_set_destination() and
           sd_bus_message_set_sender(), the message is already sealed.

       -EEXIST
           The message already has a destination or sender field set.

NOTES
       These APIs are implemented as a shared library, which can be compiled
       and linked to with the libsystemd pkg-config(1) file.

SEE ALSO
       systemd(1), sd-bus(3), sd_bus_new(3), sd_bus_set_sender(3)

systemd 252                                  SD_BUS_MESSAGE_SET_DESTINATION(3)

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