GDM includes support for publishing user login information with the user
and login session accounting framework known as ConsoleKit. ConsoleKit
is able to keep track of all the users currently logged in. In this
respect, it can be used as a replacement for the utmp or utmpx files that
are available on most Unix-like Operating Systems.
When GDM is about to create a new login process for a user it will call
a privileged method of ConsoleKit in order to open a new session for this
user. At this time GDM also provides ConsoleKit with information about
this user session such as: the user ID, the X11 Display name that will be
associated with the session, the host-name from which the session
originates (useful in the case of an XDMCP session), whether or not this
session is attached, etc. As the entity that initiates the user process,
GDM is in a unique position to know about the user session and to be
trusted to provide these bits of information. The use of this privileged
method is restricted by the use of the D-Bus system message bus security
policy.
In case a user with an existing session has authenticated
at GDM and requests to resume that existing session, GDM calls a
privileged method of ConsoleKit to unlock that session. The exact
details of what happens when the session receives this unlock signal are
undefined and session-specific. However, most sessions will unlock a
screensaver in response.
When the user chooses to log out, or if GDM or the session quit
unexpectedly the user session will be unregistered from ConsoleKit.
Tentang
Hak Cipta
- Hak Cipta © 1998, 1999 Martin K. Petersen
- Hak Cipta © 2001, 2003, 2004 George Lebl
- Hak Cipta © 2003, 2007, 2008 Red Hat, Inc.
- Hak Cipta © 2003, 2011 Oracle dan/atau afiliasinya. Semua hak dipertahankan.
- Hak Cipta © 2010. Andika Triwidada (andika@gmail.com)
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