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authorWilliam Jon McCann <jmccann@redhat.com>2008-07-30 17:37:24 -0400
committerWilliam Jon McCann <jmccann@redhat.com>2008-07-30 17:37:24 -0400
commitedad750e967458f55b9e761af966f325213ce9fe (patch)
treed068c3e14113e3c6067185b4f5e25ef219438273 /doc/xml/ck-terms.xml
parent77fe8e2e89af7cd21357116e9668b23d958fb2a5 (diff)
reorganize the docs a bit
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-<chapter id="terms">
- <title>Terminology</title>
-
- <sect1>
- <title>Session</title>
- <para>
-A session is a collection of all processes that share knowledge of a
-secret. In the typical (or ideal) case, these processes all originate
-from a single common ancestor.
- </para>
- <para>
-As an implementation detail, for now, this secret should be stored in
-the process environment by the session leader under the name
-XDG_SESSION_COOKIE. When and if we are able to take advantage of a
-mechanism in the underlying system to store session registration
-information - we will. However, such a mechanism is not known at the
-present time.
- </para>
- <para>
-Using an environment variable does have certain advantages. For one,
-it is quite easy for a process to opt-out of a Session by simply
-unsetting the XDG_SESSION_COOKIE variable.
- </para>
- <para>
-Limitations of using an environment variable implementation include
-not being able to strictly limit visibility of the secret to a particular
-process ancestry. So, it is not possible to enforce session boundaries
-other than on a per-user basis. For example, we don't yet have a way
-to prevent a process from moving between sessions owned by the same
-user.
- </para>
- </sect1>
-
- <sect1>
- <title>Session leader</title>
- <para>
-The session leader is the process that requests that a new session be
-opened. It does this by connecting to the D-Bus system bus and using
-either org.freedesktop.ConsoleKit.Manager.OpenSession() or
-org.freedesktop.ConsoleKit.Manager.OpenSessionWithParameters(). The session
-that it registers will remain open until the connection to the system
-bus is lost or it calls org.freedesktop.ConsoleKit.Manager.CloseSession().
- </para>
- <para>
-The session leader is the only process for which CloseSession() will
-be allowed.
- </para>
- </sect1>
-
- <sect1>
- <title>Seat</title>
- <para>
-A seat is a collection of sessions and a set of hardware (usually at
-least a keyboard and mouse). Only one session may be active on a
-seat at a time.
- </para>
- <para>
-At the present time, all Sessions that are considered "local" to
-a system will be added the the first Seat and every other Session
-will be added to its own Seat.
- </para>
- <para>
-True, hardware, multi-seat capabilities will be added in a later release.
- </para>
- </sect1>
-
-</chapter>