dbus-broker-30

# dbus-broker - Linux D-Bus Message Broker

## CHANGES WITH 30:

    * Pull in subprojects via meson wraps. Subprojects are no longer
      included via git submodules, but instead pulled in at build-time via
      meson. All subprojects are converted to follow semver-style
      versioning, and dbus-broker pulls them in via a versioned dependency.
      All subprojects are still statically linked and considered part of
      dbus-broker. Any critical update to any subproject will cause a new
      release of dbus-broker, as it always did. Distributions are not
      required to monitor the subprojects manually.
      The official release-tarballs of dbus-broker include up-to-date
      subproject sources and can be used for offline builds. Distributions
      are free to use newer subproject sources for their rebuilds, and this
      is explicitly supported.
      Please refer to the meson documentation for details on how to manage
      subprojects. You can still pull in other versions of the dependencies
      by putting the sources into ./subprojects/. This change merely makes
      meson pull in the newest sources via a meson-wrap-file, if, and only
      if, no other sources have been provided.
      This change requires `meson-0.60` or newer.

    * Systemd units with failed `Condition*=` directives are now correctly
      considered failed, even if they report success.

    * Failed service activations now report more detailed information on
      the activation failure back through the activating client. The exact
      error information is now transmitted back from the launcher to the
      broker and then included in the dbus error message to the client.

    * Order the broker unit explicitly after `dbus.socket` to enforce the
      dependency even if the broker is disable temporarily. When the unit
      is enabled, this dependency is implicit due to the used alias to
      `dbus.service`.

    * The broker now runs in `session.slice` if applicable. The broker is
      thus considered more vital to the session and thus is less likely to
      be collected on resource exhaustion.

    * The `GetStats()` call on `org.freedeskop.DBus.Debug` now properly
      returns reply-owner statistics. Before, those were always set to 0.

    * Fix incorrect resource accounting of connecting peers. Before, only
      the data a peer actually transmitted/received was accounted, but the
      management object of the peer itself was not. This is now fixed to
      properly account all resources a peer uses.

    * Fix NULL-derefs in the XML configuration parser. Empty XML tags could
      have caused NULL-derefs before. This is now fixed.

    * Fix a buffer-overflow in shell-quote parsing, used by the `Exec=`
      line in activation service files.

    * Fix the launcher to obtain service-paths from systemd directly rather
      than building them manually. This will correctly resolve unit aliases
      and other quirks of systemd units.

    Contributions from: David Rheinsberg, Hugo Osvaldo Barrera, Luca
                        Boccassi, Zbigniew Jędrzejewski-Szmek, msizanoen1

    - Dußlingen, 2022-05-10