sd_bus_message_set_destination(3) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | NOTES | SEE ALSO | COLOPHON

SD_BUS_MESSAGE_SET_DESTINATION(3)sage_set_destinationSAGE_SET_DESTINATION(3)

NAME         top

       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         top

       #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         top

       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         top

       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         top

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

SEE ALSO         top

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

COLOPHON         top

       This page is part of the systemd (systemd system and service manager)
       project.  Information about the project can be found at 
       ⟨http://www.freedesktop.org/wiki/Software/systemd⟩.  If you have a bug
       report for this manual page, see
       ⟨http://www.freedesktop.org/wiki/Software/systemd/#bugreports⟩.  This
       page was obtained from the project's upstream Git repository
       ⟨https://github.com/systemd/systemd.git⟩ on 2020-06-09.  (At that
       time, the date of the most recent commit that was found in the repos‐
       itory was 2020-06-09.)  If you discover any rendering problems in
       this HTML version of the page, or you believe there is a better or
       more up-to-date source for the page, or you have corrections or
       improvements to the information in this COLOPHON (which is not part
       of the original manual page), send a mail to man-pages@man7.org

systemd 245                                SD_BUS_MESSAGE_SET_DESTINATION(3)

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