NAME

       sd_bus_set_connected_signal, sd_bus_get_connected_signal - Control emmission of local connection
       establishment signal on bus connections

SYNOPSIS

       #include <systemd/sd-bus.h>

       int sd_bus_set_connected_signal(sd_bus *bus, int b);

       int sd_bus_get_connected_signal(sd_bus *bus);

DESCRIPTION

       sd_bus_set_connected_signal() may be used to control whether a local, synthetic Connected() signal
       message shall be generated and enqueued for dispatching when the connection is fully established. If the
       b parameter is zero the message is not generated (the default), otherwise it is generated.

       sd_bus_get_connected_signal() may be used to query whether this feature is enabled. It returns zero if
       not, positive otherwise.

       The Connected() signal message is generated from the "org.freedesktop.DBus.Local" service and interface,
       and "/org/freedesktop/DBus/Local" object path. Use sd_bus_match_signal_async(3) to match on this signal.

       This message is particularly useful on slow transports where connections take a long time to be
       established. This is especially the case when sd_bus_set_watch_bind(3) is used. The signal is generated
       when the sd_bus_is_ready(3) returns positive for the first time.

       The Connected() signal corresponds with the Disconnected() signal that is synthesized locally when the
       connection is terminated. The latter is generated unconditionally however, unlike the former which needs
       to be enabled explicitly before it is generated, with sd_bus_set_connected_signal().

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.

NOTES

       sd_bus_set_connected_signal() and sd_bus_get_connected_signal() are available 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_match_signal_async(3), sd_bus_set_watch_bind(3), sd_bus_is_ready(3)