sd_bus_set_sender(3) — Linux manual page


SD_BUS_SET_SENDER(3)        sd_bus_set_sender       SD_BUS_SET_SENDER(3)

NAME         top

       sd_bus_set_sender, sd_bus_get_sender - Configure default sender
       for outgoing messages

SYNOPSIS         top

       #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         top

       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         top

       On success, these functions return 0 or a positive integer. On
       failure, they return a negative errno-style error code.

       Returned errors may indicate the following problems:

           The bus connection has been created in a different process,
           library or module instance.

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

NOTES         top

       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

HISTORY         top

       sd_bus_set_sender() and sd_bus_get_sender() were added in version

SEE ALSO         top

       systemd(1), sd-bus(3), sd_bus_message_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
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       This page was obtained from the project's upstream Git repository
       ⟨⟩ on 2023-12-22.  (At that
       time, the date of the most recent commit that was found in the
       repository was 2023-12-22.)  If you discover any rendering
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       (which is not part of the original manual page), send a mail to

systemd 255                                         SD_BUS_SET_SENDER(3)

Pages that refer to this page: sd-bus(3)sd_bus_message_set_destination(3)systemd.directives(7)systemd.index(7)