|
|
| (5 intermediate revisions by 5 users not shown) |
| Line 1: |
Line 1: |
| == Startkde Script ==
| | {{Moved To Userbase}} |
| | |
| The KDE startup sequence starts with the '''startkde''' script. In most cases this
| |
| script gets called from the display manager (KDM) once the user has been authenticated.
| |
| There are two very important lines in the startkde script:
| |
| <code>
| |
| LD_BIND_NOW=true kdeinit +kcminit +knotify
| |
| </code>
| |
| and
| |
| <code>
| |
| kwrapper ksmserver $KDEWM
| |
| </code>
| |
| The first line starts the kdeinit master process. This process is used to start all other
| |
| KDE processes. The arguments behind kdeinit are the names of additional services to be started.
| |
| The '''+''' indicates that kdeinit needs to wait till the service has finished.
| |
| | |
| The second line asks kdeinit to start the ksmserver session manager process.
| |
| The session manager determines the lifetime of the session. When this process exits, the user is logged out.
| |
| | |
| == Background Services ==
| |
| All KDE background services are user specific, unlike system daemons they are not shared between users.
| |
| Apart from being unique per user they are unique per X-server display as well.
| |
| | |
| === kdeinit: Kicking Everything Off ===
| |
| kdeinit is used to start all other KDE programs. kdeinit can start normal binary program files as well
| |
| as kdeinit loadable modules (KLMs). KLMs work just like binary program files but can be started
| |
| more efficiently. The drawback is that programs started this way appear as ''kdeinit'' in the output
| |
| of <tt>top</tt> and <tt>ps</tt>. Use <tt>top -c</tt> or <tt>ps aux</tt> to see the actual program name.
| |
| For example:
| |
| <code>
| |
| > ps aux
| |
| waba 23184 0.2 2.1 23428 11124 ? S 21:41 0:00 kdeinit: Running...
| |
| waba 23187 0.1 2.1 23200 11124 ? S 21:41 0:00 kdeinit: dcopserver --nosid
| |
| waba 23189 0.2 2.4 25136 12496 ? S 21:41 0:00 kdeinit: klauncher
| |
| waba 23192 0.7 2.8 25596 14772 ? S 21:41 0:00 kdeinit: kded
| |
| waba 23203 0.8 3.4 31516 17892 ? S 21:41 0:00 kdeinit: knotify
| |
| </code>
| |
| <tt>kdeinit: Running...</tt> indicates the master kdeinit process. The other processes listed
| |
| are programs started as KLMs.
| |
| | |
| When kdeinit starts for the first time it will launch klauncher and kded, as well as any additional
| |
| programs specified on its command line in the startkde script. Normally that is kcminit and knotify.
| |
| | |
| === dbus-daemon: Inter-process Communication ===
| |
| dbus-daemon is a background process (daemon) which provides inter-process communication (IPC) facilities to all KDE
| |
| applications as well as several other system components, such as HAL, network manager, power manager and various non-KDE desktop applications. It is a cross-desktop, portable IPC project which is hosted at freedesktop.org.
| |
| | |
| D-Bus facilities are accessible from the command shell via the qdcop command line tool and can be explored using the graphical dcop-viewer application. D-Bus is essential for all KDE applications and should autostart when requested.
| |
| | |
| === klauncher: Service Activation ===
| |
| klauncher is a deamon which is responsible for service activation within KDE. It operates in close connection with the kdeinit master process to start new processes. KDE applications communicate with klauncher over the D-Bus in order to start new applications or services.
| |
| | |
| === kded: Background Services ===
| |
| kded is a generic KDE daemon. It has the ability to load various service modules and run these in the background. Each kded service module is described by a .desktop file installed under {{path|$KDEDIR/share/services/kded/}} The '''Service Manager''' in the Control Center can be used to
| |
| monitor the status of the service modules and to disable certain services.
| |
| | |
| === kcminit: Initialization Services ===
| |
| kcminit executes initialization services during startup. Initialization services are specified in the .desktop files of applications or services via the X-KDE-Init line. Initialization services are typically used for initializing hardware based on user specified settings.
| |
| | |
| <tt>kcminit --list</tt> can be used to show all initialization services and <tt>kcminit <service></tt> can be used to execute a single service explicitly. This can be useful when investigating start-up problems.
| |
| | |
| === knotify: Notification Services ===
| |
| The primary task of <tt>knotify</tt> is to relay notifications to appropriate sub-systems. For instance, sound alerts are sent to the sound system, visual alerts are showed on-screen using passive popups or dialogs, logged messages are written out to disk, etc. The actions are user configurable and support user interaction.
| |
| | |
| === ksmserver: Session Management and Autostart ===
| |
| | |
| {{improve|When the fd.o autostart spec is finalized and implemented in KDE4, update this section}}
| |
| | |
| <tt>ksmserver</tt> is KDE's session manager. On startup the session manager starts auto-start applications and it restores applications from the previous session.
| |
| | |
| The applications to auto-start are indicated by .desktop files in the {{path|$KDEDIR/share/autostart}} directory. Auto-start of an application can be made conditional upon the '''X-KDE-autostart-condition''' entry in the .desktop file. The {{path|ktip.desktop}} file for example contains:
| |
| | |
| <code>
| |
| X-KDE-autostart-condition=ktiprc:TipOfDay:RunOnStart:true
| |
| </code>
| |
| | |
| This means that the '''ktiprc''' configuration file is checked for a '''RunOnStart''' entry in the '''[TipOfDay]''' section. If no such entry is found, '''true''' is assumed, which means that ktip is one of the applications that is auto-started by default.
| |
| | |
| {{improve|This may change in KDE4. Check back closer to release.}}
| |
| | |
| There is an additional auto-start directory, {{path|$KDEHOME/Autostart}} that is sourced later. Note that this autostart path differs from the {{path|$KDEDIR/share/autostart}} directory used by the session manager. While {{path|$KDEDIR/share/autostart}} must contain .desktop files, $KDEHOME/Autostart may contain all kinds of files. The files will be opened as if they were clicked upon by the user.
| |
| | |
| The KDE session manager also restores one of the previous sessions. A session contains of a collection of applications as well as application specific information that reflects the state of the applications at the time the session was saved. Sessions are stored in the {{path|ksmserverrc}} configuration file and contains references to application specific state information. The application specific state infomation is saved in {{path|$KDEHOME/share/config/session}}.
| |
| | |
| For example if ksmserverrc contains:
| |
| <code>
| |
| restartCommand1=kwin,-session,110a0a0002000106760689100000019360000_1083342151_608625
| |
| restartCommand2=konsole,-session,10378ac070000108334204700000277690000_1083342151_552722
| |
| </code>
| |
| Then the application specific state information for <tt>kwin</tt> and <tt>konsole</tt> can be found in
| |
| <code>
| |
| $KDEHOME/share/config/session/kwin_110a0a0002000106760689100000019360000_1083342151_608625
| |
| </code>
| |
| and
| |
| <code>
| |
| $KDEHOME/share/config/session/konsole_10378ac070000108334204700000277690000_1083342151_552722
| |
| </code>
| |
| respectively.
| |
| | |
| The state information of kwin contains the location of the application windows of all the other applications in the session.
| |
| | |
| | |
| == Desktop Components ==
| |
| The three major components of the desktop are the window manager, command executer and workspace (desktop and panels).
| |
| | |
| === kwin: Window Manager ===
| |
| The window manager is always started by the session manager as part of the session restoration.
| |
| The window manager is responsible for managing all the windows across the virtual desktops,
| |
| including initial placement, minimizing, maximizing, raising, lowering of the windows and
| |
| focus switching between windows.
| |
| | |
| By default, KWin is started as the window manager in a KDE session. This can be overriden by defining the <tt>KDEWM</tt> environment variable to be name of an alternate window manager.
| |
| | |
| === krunner: Run Dialog, Task List, Screensaver ===
| |
| | |
| <tt>krunner</tt> is auto-started by the session manager by means of {{path|$KDEDIR/share/autostart/krunner.desktop}}. It is responsible for activating the screensaver, application start feedback, the Run Command (Alt-F2) dialog, and the task list window and is meant to run for the lifetime of the session.
| |
| | |
| === Plasma ===
| |
| | |
| {{improve|when plasma enters the start up sequence document it here.}}
| |
| | |
| KDesktop is auto-started by the session manager by means of {{path|$KDEDIR/share/autostart/plasma.desktop}}
| |
