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diff --git a/doc/kdm/kdmrc-ref.docbook b/doc/kdm/kdmrc-ref.docbook new file mode 100644 index 000000000..9ebcfbdd3 --- /dev/null +++ b/doc/kdm/kdmrc-ref.docbook @@ -0,0 +1,2316 @@ +<!-- generated from ../../kdm/config.def - DO NOT EDIT! --> + +<chapter id="kdm-files"> +<title>The Files &kdm; Uses for Configuration</title> + +<para>This chapter documents the files that control &kdm;'s behavior. +Some of this can be also controlled from the &kcontrol; module, but +not all.</para> + +<sect1 id="kdmrc"> +<title>&kdmrc; - The &kdm; master configuration file</title> + +<para>The basic format of the file is <quote>INI-like</quote>. +Options are key/value pairs, placed in sections. +Everything in the file is case sensitive. +Syntactic errors and unrecognized key/section identifiers cause &kdm; to +issue non-fatal error messages.</para> + +<para>Lines beginning with <literal>#</literal> are comments; empty lines +are ignored as well.</para> + +<para>Sections are denoted by +<literal>[</literal><replaceable>Name of Section</replaceable><literal>]</literal>. +</para> + +<para>You can configure every X-display individually.</para> +<para>Every display has a display name, which consists of a host name +(which is empty for local displays specified in <option>StaticServers</option> +or <option>ReserveServers</option>), a colon, and a display number. +Additionally, a display belongs to a +display class (which can be ignored in most cases).</para> + +<para>Sections with display-specific settings have the formal syntax +<literal>[X-</literal> <replaceable>host</replaceable> [ <literal>:</literal> <replaceable>number</replaceable> [ <literal>_</literal> <replaceable>class</replaceable> ] ] <literal>-</literal> <replaceable>sub-section</replaceable> <literal>]</literal> +</para> +<para>All sections with the same <replaceable>sub-section</replaceable> +make up a section class.</para> + +<para>You can use the wildcard <literal>*</literal> (match any) for +<replaceable>host</replaceable>, <replaceable>number</replaceable>, +and <replaceable>class</replaceable>. You may omit trailing components; +they are assumed to be <literal>*</literal> then. The host part may be a +domain specification like <replaceable>.inf.tu-dresden.de</replaceable> +or the wildcard <literal>+</literal> (match non-empty).</para> + +<para>From which section a setting is actually taken is determined by +these rules:</para> + +<itemizedlist> +<listitem> +<para>An exact match takes precedence over a partial match (for the +host part), which in turn takes precedence over a wildcard +(<literal>+</literal> taking precendence over <literal>*</literal>).</para> +</listitem> + +<listitem> +<para>Precedence decreases from left to right for equally exact matches.</para> +</listitem> + +<listitem> + +<para> +Example: display name <quote>myhost.foo:0</quote>, class <quote>dpy</quote> +</para> +<itemizedlist> +<listitem> +<para>[X-myhost.foo:0_dpy] precedes</para> +</listitem> +<listitem> +<para>[X-myhost.foo:0_*] (same as [X-myhost.foo:0]) precedes</para> +</listitem> +<listitem> +<para>[X-myhost.foo:*_dpy] precedes</para> +</listitem> +<listitem> +<para>[X-myhost.foo:*_*] (same as [X-myhost.foo]) precedes</para> +</listitem> +<listitem> +<para>[X-.foo:*_*] (same as [X-.foo]) precedes</para> +</listitem> +<listitem> +<para>[X-+:0_dpy] precedes</para> +</listitem> +<listitem> +<para>[X-*:0_dpy] precedes</para> +</listitem> +<listitem> +<para>[X-*:0_*] (same as [X-*:0]) precedes</para> +</listitem> +<listitem> +<para>[X-*:*_*] (same as [X-*]).</para> +</listitem> +<listitem> +<para>These sections do <emphasis>not</emphasis> match this display:</para> +<para>[X-hishost], [X-myhost.foo:0_dec], [X-*:1], [X-:*]</para> +</listitem> +</itemizedlist> + +</listitem> + +</itemizedlist> + +<para>Common sections are [X-*] (all displays), [X-:*] (all local displays) +and [X-:0] (the first local display).</para> + +<para>The format for all keys is +<userinput><option><replaceable>key</replaceable></option> <literal>=</literal> <parameter>value</parameter></userinput>. +Keys are only valid in the section class they are defined for. +Some keys do not apply to particular displays, in which case they are ignored. +</para> + +<para>If a setting is not found in any matching section, the default +is used.</para> + +<para>Special characters need to be backslash-escaped (leading and trailing +spaces (<literal>\s</literal>), tab (<literal>\t</literal>), linefeed +(<literal>\n</literal>), carriage return (<literal>\r</literal>) and the +backslash itself (<literal>\\</literal>)).</para> +<para>In lists, fields are separated with commas without whitespace in between. +</para> +<para>Some command strings are subject to simplified sh-style word splitting: +single quotes (<literal>'</literal>) and double quotes (<literal>"</literal>) +have the usual meaning; the backslash quotes everything (not only special +characters). Note that the backslashes need to be doubled because of the +two levels of quoting.</para> + +<note><para>A pristine &kdmrc; is very thoroughly commented. +All comments will be lost if you change this file with the +kcontrol frontend.</para></note> + + +<sect2 id="kdmrc-general"> +<title>The [General] section of &kdmrc;</title> + +<para> +This section contains global options that do not fit into any specific section. +</para> + +<variablelist> + +<varlistentry> +<term id="option-configversion"><option>ConfigVersion</option></term> +<listitem> +<para> +This option exists solely for the purpose of clean automatic upgrades. +<emphasis>Do not</emphasis> change it, you may interfere with future +upgrades and this could result in &kdm; failing to run. +</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-staticservers"><option>StaticServers</option></term> +<listitem> +<para> +List of displays (&X-Server;s) permanently managed by &kdm;. Displays with a +hostname are foreign displays which are expected to be already running, +the others are local displays for which &kdm; starts an own &X-Server;; +see <option>ServerCmd</option>. Each display may belong to a display class; +append it to the display name separated by an underscore. +See <xref linkend="kdmrc-xservers"/> for the details. +</para> +<para>The default is <quote>:0</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-reserveservers"><option>ReserveServers</option></term> +<listitem> +<para> +List of on-demand displays. See <option>StaticServers</option> for syntax. +</para> +<para>Empty by default.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-servervts"><option>ServerVTs</option></term> +<listitem> +<para> +List of Virtual Terminals to allocate to &X-Server;s. For negative numbers the +absolute value is used, and the <acronym>VT</acronym> will be allocated only +if the kernel says it is free. If &kdm; exhausts this list, it will allocate +free <acronym>VT</acronym>s greater than the absolute value of the last entry +in this list. +Currently Linux only. +</para> +<para>Empty by default.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-consolettys"><option>ConsoleTTYs</option></term> +<listitem> +<para> +This option is for operating systems (<acronym>OS</acronym>s) with support +for virtual terminals (<acronym>VT</acronym>s), by both &kdm; and the +<acronym>OS</acronym>s itself. +Currently this applies only to Linux. +</para><para> +When &kdm; switches to console mode, it starts monitoring all +<acronym>TTY</acronym> lines listed here (without the leading +<literal>/dev/</literal>). +If none of them is active for some time, &kdm; switches back to the X login. +</para> +<para>Empty by default.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-pidfile"><option>PidFile</option></term> +<listitem> +<para> +The filename specified will be created to contain an ASCII representation +of the process ID of the main &kdm; process; the PID will not be stored +if the filename is empty. +</para> +<para>Empty by default.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-lockpidfile"><option>LockPidFile</option></term> +<listitem> +<para> +This option controls whether &kdm; uses file locking to keep multiple +display managers from running onto each other. +</para> +<para>The default is <quote>true</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-authdir"><option>AuthDir</option></term> +<listitem> +<para> +This names a directory under which &kdm; stores &X-Server; authorization +files while initializing the session. &kdm; expects the system to clean up +this directory from stale files on reboot. +</para><para> +The authorization file to be used for a particular display can be +specified with the <option>AuthFile</option> option in [X-*-Core]. +</para> +<para>The default is <quote>/var/run/xauth</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-autorescan"><option>AutoRescan</option></term> +<listitem> +<para> +This boolean controls whether &kdm; automatically re-reads its +configuration files if it finds them to have changed. +</para> +<para>The default is <quote>true</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-exportlist"><option>ExportList</option></term> +<listitem> +<para> +Additional environment variables &kdm; should pass on to all programs it runs. +<envar>LD_LIBRARY_PATH</envar> and <envar>XCURSOR_THEME</envar> are good candidates; +otherwise, it should not be necessary very often. +</para> +<para>Empty by default.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-randomfile"><option>RandomFile</option></term> +<listitem> +<para> +If the system has no native entropy source like /dev/urandom (see +<option>RandomDevice</option>) and no entropy daemon like EGD (see +<option>PrngdSocket</option> and <option>PrngdPort</option>) is running, +&kdm; will fall back to its own pseudo-random number generator +that will, among other things, successively checksum parts of this file +(which, obviously, should change frequently). +</para><para> +This option does not exist on Linux and various BSDs. +</para> +<para>The default is <quote>/dev/mem</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-prngdsocket"><option>PrngdSocket</option></term> +<listitem> +<para> +If the system has no native entropy source like /dev/urandom (see +<option>RandomDevice</option>), read random data from a Pseudo-Random +Number Generator Daemon, +like EGD (http://egd.sourceforge.net) via this UNIX domain socket. +</para><para> +This option does not exist on Linux and various BSDs. +</para> +<para>Empty by default.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-prngdport"><option>PrngdPort</option></term> +<listitem> +<para> +Same as <option>PrngdSocket</option>, only use a TCP socket on localhost. +</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-randomdevice"><option>RandomDevice</option></term> +<listitem> +<para> +The path to a character device which &kdm; should read random data from. +Empty means to use the system's preferred entropy device if there is one. +</para><para> +This option does not exist on OpenBSD, as it uses the arc4_random +function instead. +</para> +<para>Empty by default.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-fifodir"><option>FifoDir</option></term> +<listitem> +<para> +The directory in which the command <acronym>FiFo</acronym>s should +be created; make it empty to disable them. +</para> +<para>The default is <quote>/var/run/xdmctl</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-fifogroup"><option>FifoGroup</option></term> +<listitem> +<para> +The group to which the global command <acronym>FiFo</acronym> should belong; +can be either a name or a numerical ID. +</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-datadir"><option>DataDir</option></term> +<listitem> +<para> +The directory in which &kdm; should store persistent working data; such data +is, for example, the previous user that logged in on a particular display. +</para> +<para>The default is <quote>/var/lib/kdm</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-dmrcdir"><option>DmrcDir</option></term> +<listitem> +<para> +The directory in which &kdm; should store users' <filename>.dmrc</filename> files. This is only +needed if the home directories are not readable before actually logging in +(like with AFS). +</para> +<para>Empty by default.</para> +</listitem> +</varlistentry> + +</variablelist> +</sect2> + + +<sect2 id="kdmrc-xdmcp"> +<title>The [Xdmcp] section of &kdmrc;</title> + +<para> +This section contains options that control &kdm;'s handling of +&XDMCP; requests. +</para> + +<variablelist> + +<varlistentry> +<term id="option-enable"><option>Enable</option></term> +<listitem> +<para> +Whether &kdm; should listen to incoming &XDMCP; requests. +</para> +<para>The default is <quote>true</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-port"><option>Port</option></term> +<listitem> +<para> +This indicates the UDP port number which &kdm; uses to listen for incoming +&XDMCP; requests. Unless you need to debug the system, leave this with its +default value. +</para> +<para>The default is <quote>177</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-keyfile"><option>KeyFile</option></term> +<listitem> +<para> +XDM-AUTHENTICATION-1 style &XDMCP; authentication requires a private +key to be shared between &kdm; and the terminal. This option specifies +the file containing those values. Each entry in the file consists of a +display name and the shared key. +</para> +<para>Empty by default.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-xaccess"><option>Xaccess</option></term> +<listitem> +<para> +To prevent unauthorized &XDMCP; service and to allow forwarding of &XDMCP; +IndirectQuery requests, this file contains a database of hostnames which +are either allowed direct access to this machine, or have a list of hosts +to which queries should be forwarded to. The format of this file is +described in <xref linkend="kdmrc-xaccess"/>. +</para> +<para>The default is <quote>${<envar>kde_confdir</envar>}/kdm/Xaccess</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-choicetimeout"><option>ChoiceTimeout</option></term> +<listitem> +<para> +Number of seconds to wait for the display to respond after the user has +selected a host from the chooser. If the display sends an &XDMCP; +IndirectQuery within this time, the request is forwarded to the chosen +host; otherwise, it is assumed to be from a new session and the chooser +is offered again. +</para> +<para>The default is <quote>15</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-removedomainname"><option>RemoveDomainname</option></term> +<listitem> +<para> +When computing the display name for &XDMCP; clients, the name resolver will +typically create a fully qualified host name for the terminal. As this is +sometimes confusing, &kdm; will remove the domain name portion of the host +name if it is the same as the domain name of the local host when this option +is enabled. +</para> +<para>The default is <quote>true</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-sourceaddress"><option>SourceAddress</option></term> +<listitem> +<para> +Use the numeric IP address of the incoming connection on multihomed hosts +instead of the host name. This is to avoid trying to connect on the wrong +interface which might be down at this time. +</para> +<para>The default is <quote>false</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-willing"><option>Willing</option></term> +<listitem> +<para> +This specifies a program which is run (as +<systemitem class="username">root</systemitem>) when an &XDMCP; +DirectQuery or BroadcastQuery is received and this host is configured +to offer &XDMCP; display management. The output of this program may be +displayed in a chooser window. If no program is specified, the string +<quote>Willing to manage</quote> is sent. +</para> +<para>Empty by default.</para> +</listitem> +</varlistentry> + +</variablelist> +</sect2> + + +<sect2 id="kdmrc-shutdown"> +<title>The [Shutdown] section of &kdmrc;</title> + +<para> +This section contains global options concerning system shutdown. +</para> + +<variablelist> + +<varlistentry> +<term id="option-haltcmd"><option>HaltCmd</option></term> +<listitem> +<para> +The command (subject to word splitting) to run to halt/poweroff the system. +</para><para> +The default is something reasonable for the system on which &kdm; was built, like +<command>/sbin/shutdown <option>-h</option> <parameter>now</parameter></command>. +</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-rebootcmd"><option>RebootCmd</option></term> +<listitem> +<para> +The command (subject to word splitting) to run to reboot the system. +</para><para> +The default is something reasonable for the system &kdm; on which was built, like +<command>/sbin/shutdown <option>-r</option> <parameter>now</parameter></command>. +</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-allowfifo"><option>AllowFifo</option></term> +<listitem> +<para> +Whether it is allowed to shut down the system via the global command <acronym>FiFo</acronym>. +</para> +<para>The default is <quote>false</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-allowfifonow"><option>AllowFifoNow</option></term> +<listitem> +<para> +Whether it is allowed to abort active sessions when shutting down the +system via the global command <acronym>FiFo</acronym>. +</para><para> +This will have no effect unless <option>AllowFifo</option> is enabled. +</para> +<para>The default is <quote>true</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-bootmanager"><option>BootManager</option></term> +<listitem> +<para> +The boot manager &kdm; should use for offering boot options in the +shutdown dialog. +</para> +<variablelist> +<varlistentry> +<term><parameter>None</parameter></term> +<listitem><para>no boot manager</para></listitem> +</varlistentry> +<varlistentry> +<term><parameter>Grub</parameter></term> +<listitem><para>Grub boot manager</para></listitem> +</varlistentry> +<varlistentry> +<term><parameter>Lilo</parameter></term> +<listitem><para>Lilo boot manager (Linux on i386 & x86-64 only)</para></listitem> +</varlistentry> +</variablelist> +<para>The default is <quote>None</quote>.</para> +</listitem> +</varlistentry> + +</variablelist> +</sect2> + + +<sect2 id="kdmrc-core"> +<title>The [X-*-Core] section class of &kdmrc;</title> + +<para> +This section class contains options concerning the configuration +of the &kdm; backend (core). +</para> + +<variablelist> + +<varlistentry> +<term id="option-opendelay"><option>OpenDelay</option></term> +<listitem> +<para> +See <option>OpenRepeat</option>. +</para> +<para>The default is <quote>15</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-opentimeout"><option>OpenTimeout</option></term> +<listitem> +<para> +See <option>OpenRepeat</option>. +</para> +<para>The default is <quote>120</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-openrepeat"><option>OpenRepeat</option></term> +<listitem> +<para> +These options control the behavior of &kdm; when attempting to open a +connection to an &X-Server;. <option>OpenDelay</option> is the length +of the pause (in seconds) between successive attempts, +<option>OpenRepeat</option> is the number of attempts to make and +<option>OpenTimeout</option> is the amount of time to spend on a +connection attempt. After <option>OpenRepeat</option> attempts have been +made, or if <option>OpenTimeout</option> seconds elapse in any particular +connection attempt, the start attempt is considered failed. +</para> +<para>The default is <quote>5</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-startattempts"><option>StartAttempts</option></term> +<listitem> +<para> +How many times &kdm; should attempt to start a <literal>foreign</literal> +display listed in <option>StaticServers</option> before giving up +and disabling it. +Local displays are attempted only once, and &XDMCP; displays are retried +indefinitely by the client (unless the option <option>-once</option> +was given to the &X-Server;). +</para> +<para>The default is <quote>4</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-serverattempts"><option>ServerAttempts</option></term> +<listitem> +<para> +How many times &kdm; should attempt to start up a local &X-Server;. +Starting up includes executing it and waiting for it to come up. +</para> +<para>The default is <quote>1</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-servertimeout"><option>ServerTimeout</option></term> +<listitem> +<para> +How many seconds &kdm; should wait for a local &X-Server; to come up. +</para> +<para>The default is <quote>15</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-servercmd"><option>ServerCmd</option></term> +<listitem> +<para> +The command line to start the &X-Server;, without display number and VT spec. +This string is subject to word splitting. +</para><para> +The default is something reasonable for the system on which &kdm; was built, +like <command>/usr/X11R6/bin/X</command>. +</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-serverargslocal"><option>ServerArgsLocal</option></term> +<listitem> +<para> +Additional arguments for the &X-Server;s for local sessions. +This string is subject to word splitting. +</para> +<para>Empty by default.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-serverargsremote"><option>ServerArgsRemote</option></term> +<listitem> +<para> +Additional arguments for the &X-Server;s for remote sessions. +This string is subject to word splitting. +</para> +<para>Empty by default.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-servervt"><option>ServerVT</option></term> +<listitem> +<para> +The VT the &X-Server; should run on. +<option>ServerVTs</option> should be used instead of this option. +Leave it zero to let &kdm; assign a <acronym>VT</acronym> automatically. +Set it to <literal>-1</literal> to avoid assigning a <acronym>VT</acronym> +alltogether - this is required for setups with multiple physical consoles. +Currently Linux only. +</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-servertty"><option>ServerTTY</option></term> +<listitem> +<para> +This option is for <acronym>OS</acronym>s without support for +<acronym>VT</acronym>s, either by &kdm; or the <acronym>OS</acronym> itself. +Currently this applies to all <acronym>OS</acronym>s but Linux. +</para><para> +When &kdm; switches to console mode, it starts monitoring this +<acronym>TTY</acronym> line (specified without the leading +<literal>/dev/</literal>) for activity. If the line is not used for some time, +&kdm; switches back to the X login. +</para> +<para>Empty by default.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-pinginterval"><option>PingInterval</option></term> +<listitem> +<para> +See <option>PingTimeout</option>. +</para> +<para>The default is <quote>5</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-pingtimeout"><option>PingTimeout</option></term> +<listitem> +<para> +To discover when <emphasis>remote</emphasis> displays disappear, &kdm; +regularly pings them. +<option>PingInterval</option> specifies the time (in minutes) between the +pings and <option>PingTimeout</option> specifies the maximum amount of +time (in minutes) to wait for the terminal to respond to the request. If +the terminal does not respond, the session is declared dead and terminated. +</para><para> +If you frequently use X terminals which can become isolated from +the managing host, you may wish to increase the timeout. The only worry +is that sessions will continue to exist after the terminal has been +accidentally disabled. +</para> +<para>The default is <quote>5</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-terminateserver"><option>TerminateServer</option></term> +<listitem> +<para> +Whether &kdm; should restart the local &X-Server; after session exit instead +of resetting it. Use this if the &X-Server; leaks memory or crashes the system +on reset attempts. +</para> +<para>The default is <quote>false</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-resetsignal"><option>ResetSignal</option></term> +<listitem> +<para> +The signal number to use to reset the local &X-Server;. +</para> +<para>The default is <quote>1 (SIGHUP)</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-termsignal"><option>TermSignal</option></term> +<listitem> +<para> +The signal number to use to terminate the local &X-Server;. +</para> +<para>The default is <quote>15 (SIGTERM)</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-authorize"><option>Authorize</option></term> +<listitem> +<para> +Controls whether &kdm; generates and uses authorization for +<emphasis>local</emphasis> &X-Server; connections. +For &XDMCP; displays the authorization requested by the display is used; +foreign non-&XDMCP; displays do not support authorization at all. +</para> +<para>The default is <quote>true</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-authnames"><option>AuthNames</option></term> +<listitem> +<para> +If <option>Authorize</option> is true, use the authorization mechanisms +listed herein. The MIT-MAGIC-COOKIE-1 authorization is always available; +XDM-AUTHORIZATION-1, SUN-DES-1 and MIT-KERBEROS-5 might be available as well, +depending on the build configuration. +</para> +<para>The default is <quote>DEF_AUTH_NAME</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-resetforauth"><option>ResetForAuth</option></term> +<listitem> +<para> +Some <emphasis>old</emphasis> &X-Server;s re-read the authorization file +at &X-Server; reset time, instead of when checking the initial connection. +As &kdm; generates the authorization information just before connecting to +the display, an old &X-Server; would not get up-to-date authorization +information. This option causes &kdm; to send SIGHUP to the &X-Server; +after setting up the file, causing an additional &X-Server; reset to occur, +during which time the new authorization information will be read. +</para> +<para>The default is <quote>false</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-authfile"><option>AuthFile</option></term> +<listitem> +<para> +This file is used to communicate the authorization data from &kdm; to +the &X-Server;, using the <option>-auth</option> &X-Server; command line +option. It should be kept in a directory which is not world-writable +as it could easily be removed, disabling the authorization mechanism in +the &X-Server;. If not specified, a random name is generated from +<option>AuthDir</option> and the name of the display. +</para> +<para>Empty by default.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-resources"><option>Resources</option></term> +<listitem> +<para> +This option specifies the name of the file to be loaded by +<command>xrdb</command> as the resource database onto the root window +of screen 0 of the display. KDE programs generally do not use +X-resources, so this option is only needed if the <option>Setup</option> +program needs some X-resources. +</para> +<para>Empty by default.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-xrdb"><option>Xrdb</option></term> +<listitem> +<para> +The <command>xrdb</command> program to use to read the X-resources file +specified in <option>Recources</option>. +The command is subject to word splitting. +</para> +<para>The default is <quote>${<envar>x_bindir</envar>}/xrdb</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-setup"><option>Setup</option></term> +<listitem> +<para> +This string is subject to word splitting. +It specifies a program which is run (as +<systemitem class="username">root</systemitem>) before offering the +greeter window. This may be used to change the appearance of the screen +around the greeter window or to put up other windows (e.g., you may want +to run <command>xconsole</command> here). +The conventional name for a program used here is <command>Xsetup</command>. +See <xref linkend="kdmrc-xsetup"/>. +</para> +<para>Empty by default.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-startup"><option>Startup</option></term> +<listitem> +<para> +This string is subject to word splitting. +It specifies a program which is run (as +<systemitem class="username">root</systemitem>) after the user +authentication process succeeds. +The conventional name for a program used here is <command>Xstartup</command>. +See <xref linkend="kdmrc-xstartup"/>. +</para> +<para>Empty by default.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-reset"><option>Reset</option></term> +<listitem> +<para> +This string is subject to word splitting. +It specifies a program which is run (as +<systemitem class="username">root</systemitem>) after the session +terminates. +The conventional name for a program used here is <command>Xreset</command>. +See <xref linkend="kdmrc-xreset"/>. +</para> +<para>Empty by default.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-session"><option>Session</option></term> +<listitem> +<para> +This string is subject to word splitting. +It specifies the session program to be executed (as the user owning +the session). +The conventional name for a program used here is <command>Xsession</command>. +See <xref linkend="kdmrc-xsession"/>. +</para> +<para>The default is <quote>${<envar>x_bindir</envar>}/xterm -ls -T</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-failsafeclient"><option>FailsafeClient</option></term> +<listitem> +<para> +If the <option>Session</option> program fails to execute, &kdm; will +fall back to this program. This program is executed with no arguments, +but executes using the same environment variables as the session would +have had (see <xref linkend="kdmrc-xsession"/>). +</para> +<para>The default is <quote>${<envar>x_bindir</envar>}/xterm</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-userpath"><option>UserPath</option></term> +<listitem> +<para> +The <envar>PATH</envar> environment variable for +non-<systemitem class="username">root</systemitem> <option>Session</option>s. +</para><para> +The default depends on the system &kdm; was built on. +</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-systempath"><option>SystemPath</option></term> +<listitem> +<para> +The <envar>PATH</envar> environment variable for all programs but +non-<systemitem class="username">root</systemitem> +<option>Session</option>s. Note that it is good practice not to include +<literal>.</literal> (the current directory) into this entry. +</para><para> +The default depends on the system &kdm; was built on. +</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-systemshell"><option>SystemShell</option></term> +<listitem> +<para> +The <envar>SHELL</envar> environment variable for all programs but the +<option>Session</option>. +</para> +<para>The default is <quote>/bin/sh</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-userauthdir"><option>UserAuthDir</option></term> +<listitem> +<para> +When &kdm; is unable to write to the usual user authorization file +($<envar>HOME</envar>/.Xauthority), it creates a unique file name in this +directory and points the environment variable <envar>XAUTHORITY</envar> +at the created file. +</para> +<para>The default is <quote>/tmp</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-autorelogin"><option>AutoReLogin</option></term> +<listitem> +<para> +If enabled, &kdm; will automatically restart a session after an &X-Server; +crash (or if it is killed by Alt-Ctrl-BackSpace). Note that enabling this +feature opens a security hole: a secured display lock can be circumvented +(unless &kde;'s built-in screen locker is used). +</para> +<para>The default is <quote>false</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-allowrootlogin"><option>AllowRootLogin</option></term> +<listitem> +<para> +If disabled, do not allow <systemitem class="username">root</systemitem> +(and any other user with UID = 0) to log in directly. +</para> +<para>The default is <quote>true</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-allownullpasswd"><option>AllowNullPasswd</option></term> +<listitem> +<para> +If disabled, only users that have passwords assigned can log in. +</para> +<para>The default is <quote>true</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-allowshutdown"><option>AllowShutdown</option></term> +<listitem> +<para> +Who is allowed to shut down the system. This applies both to the +greeter and to the command <acronym>FiFo</acronym>. +</para> +<variablelist> +<varlistentry> +<term><parameter>None</parameter></term> +<listitem><para>no <guilabel>Shutdown...</guilabel> menu entry is shown at all</para></listitem> +</varlistentry> +<varlistentry> +<term><parameter>Root</parameter></term> +<listitem><para>the <systemitem class="username">root</systemitem> password must be entered to shut down</para></listitem> +</varlistentry> +<varlistentry> +<term><parameter>All</parameter></term> +<listitem><para>everybody can shut down the machine</para></listitem> +</varlistentry> +</variablelist> +<para>The default is <quote>All</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-allowsdforcenow"><option>AllowSdForceNow</option></term> +<listitem> +<para> +Who is allowed to abort active sessions when shutting down. +</para> +<variablelist> +<varlistentry> +<term><parameter>None</parameter></term> +<listitem><para>no forced shutdown is allowed at all</para></listitem> +</varlistentry> +<varlistentry> +<term><parameter>Root</parameter></term> +<listitem><para>the <systemitem class="username">root</systemitem> password must be entered to shut down forcibly</para></listitem> +</varlistentry> +<varlistentry> +<term><parameter>All</parameter></term> +<listitem><para>everybody can shut down the machine forcibly</para></listitem> +</varlistentry> +</variablelist> +<para>The default is <quote>All</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-defaultsdmode"><option>DefaultSdMode</option></term> +<listitem> +<para> +The default choice for the shutdown condition/timing. +</para> +<variablelist> +<varlistentry> +<term><parameter>Schedule</parameter></term> +<listitem><para>shut down after all active sessions exit (possibly at once)</para></listitem> +</varlistentry> +<varlistentry> +<term><parameter>TryNow</parameter></term> +<listitem><para>shut down, if no active sessions are open; otherwise, do nothing</para></listitem> +</varlistentry> +<varlistentry> +<term><parameter>ForceNow</parameter></term> +<listitem><para>shut down unconditionally</para></listitem> +</varlistentry> +</variablelist> +<para>The default is <quote>Schedule</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-scheduledsd"><option>ScheduledSd</option></term> +<listitem> +<para> +How to offer shutdown scheduling options: +</para> +<variablelist> +<varlistentry> +<term><parameter>Never</parameter></term> +<listitem><para>not at all</para></listitem> +</varlistentry> +<varlistentry> +<term><parameter>Optional</parameter></term> +<listitem><para>as a button in the simple shutdown dialogs</para></listitem> +</varlistentry> +<varlistentry> +<term><parameter>Always</parameter></term> +<listitem><para>instead of the simple shutdown dialogs</para></listitem> +</varlistentry> +</variablelist> +<para>The default is <quote>Never</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-nopassenable"><option>NoPassEnable</option></term> +<listitem> +<para> +Enable password-less logins on this display. <emphasis>Use with extreme care!</emphasis> +</para> +<para>The default is <quote>false</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-nopassusers"><option>NoPassUsers</option></term> +<listitem> +<para> +The users that do not need to provide a password to log in. +Items which are prefixed with <literal>@</literal> represent all users in the +user group named by that item. +<literal>*</literal> means all users but +<systemitem class="username">root</systemitem> +(and any other user with UID = 0). +<emphasis>Never</emphasis> list <systemitem class="username">root</systemitem>. +</para> +<para>Empty by default.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-autologinenable"><option>AutoLoginEnable</option></term> +<listitem> +<para> +Enable automatic login. <emphasis>Use with extreme care!</emphasis> +</para> +<para>The default is <quote>false</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-autologinagain"><option>AutoLoginAgain</option></term> +<listitem> +<para> +If true, auto-login after logout. If false, auto-login is performed only +when a display session starts up. +</para> +<para>The default is <quote>false</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-autologindelay"><option>AutoLoginDelay</option></term> +<listitem> +<para> +The delay in seconds before automatic login kicks in. This is also known as +<quote>Timed Login</quote>. +</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-autologinuser"><option>AutoLoginUser</option></term> +<listitem> +<para> +The user to log in automatically. <emphasis>Never</emphasis> specify <systemitem class="username">root</systemitem>! +</para> +<para>Empty by default.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-autologinpass"><option>AutoLoginPass</option></term> +<listitem> +<para> +The password for the user to log in automatically. This is <emphasis>not</emphasis> required +unless the user is logged into a <acronym>NIS</acronym> or Kerberos domain. If you use this +option, you should <command>chmod <option>600</option> <filename>kdmrc</filename></command> for obvious reasons. +</para> +<para>Empty by default.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-autologinlocked"><option>AutoLoginLocked</option></term> +<listitem> +<para> +Immediately lock the automatically started session. This works only with +KDE sessions. +</para> +<para>The default is <quote>false</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-sessionsdirs"><option>SessionsDirs</option></term> +<listitem> +<para> +A list of directories containing session type definitions. +</para> +<para>The default is <quote>${<envar>kde_datadir</envar>}/kdm/sessions</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-clientlogfile"><option>ClientLogFile</option></term> +<listitem> +<para> +The file (relative to the user's home directory) to redirect the session +output to. One occurrence of <parameter>%s</parameter> in this string will be +substituted with the display name. Use <parameter>%%</parameter> to obtain a +literal <literal>%</literal>. +</para> +<para>The default is <quote>.xsession-errors</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-usesessreg"><option>UseSessReg</option></term> +<listitem> +<para> +Specify whether &kdm;'s built-in utmp/wtmp/lastlog registration should +be used. If it is not, the tool <command>sessreg</command> should be used +in the <option>Startup</option> and <option>Reset</option> scripts, or, +alternatively, the pam_lastlog module should be used on +<acronym>PAM</acronym>-enabled systems. +</para> +<para>The default is <quote>true</quote>.</para> +</listitem> +</varlistentry> + +</variablelist> +</sect2> + + +<sect2 id="kdmrc-greeter"> +<title>The [X-*-Greeter] section class of &kdmrc;</title> + +<para> +This section class contains options concerning the configuration +of the &kdm; frontend (greeter). +</para> + +<variablelist> + +<varlistentry> +<term id="option-guistyle"><option>GUIStyle</option></term> +<listitem> +<para> +Specify the widget style for the greeter. Empty means to use the +built-in default which currently is <literal>Plastik</literal>. +</para> +<para>Empty by default.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-colorscheme"><option>ColorScheme</option></term> +<listitem> +<para> +Specify the widget color scheme for the greeter. Empty means to use +the built-in default which currently is yellowish grey with some light +blue and yellow elements. +</para> +<para>Empty by default.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-logoarea"><option>LogoArea</option></term> +<listitem> +<para> +What should be shown in the greeter righthand of the input lines (if +<option>UserList</option> is disabled) or above them (if +<option>UserList</option> is enabled): +</para> +<variablelist> +<varlistentry> +<term><parameter>None</parameter></term> +<listitem><para>nothing</para></listitem> +</varlistentry> +<varlistentry> +<term><parameter>Logo</parameter></term> +<listitem><para>the image specified by <option>LogoPixmap</option></para></listitem> +</varlistentry> +<varlistentry> +<term><parameter>Clock</parameter></term> +<listitem><para>a neat analog clock</para></listitem> +</varlistentry> +</variablelist> +<para>The default is <quote>Clock</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-logopixmap"><option>LogoPixmap</option></term> +<listitem> +<para> +The image to show in the greeter if <option>LogoArea</option> is +<literal>Logo</literal>. +</para> +<para>Empty by default.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-greeterpos"><option>GreeterPos</option></term> +<listitem> +<para> +The relative coordinates (percentages of the screen size; X,Y) at which +the center of the greeter is put. &kdm; aligns the greeter to the edges +of the screen it would cross otherwise. +</para> +<para>The default is <quote>50,50</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-greeterscreen"><option>GreeterScreen</option></term> +<listitem> +<para> +The screen the greeter should be displayed on in multi-headed and Xinerama +setups. The numbering starts with 0. For Xinerama, it corresponds to the +listing order in the active ServerLayout section of XF86Config; -1 means +to use the upper-left screen, -2 means to use the upper-right screen. +</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-greetstring"><option>GreetString</option></term> +<listitem> +<para> +The headline in the greeter. An empty greeting means none at all. +</para><para> +The following character pairs are replaced by their value: +<variablelist> +<varlistentry> +<term><parameter>%d</parameter></term> +<listitem><para>name of the current display</para></listitem> +</varlistentry> +<varlistentry> +<term><parameter>%h</parameter></term> +<listitem><para>local host name, possibly with the + domain name</para></listitem> +</varlistentry> +<varlistentry> +<term><parameter>%n</parameter></term> +<listitem><para>local node name, most probably the host name without the + domain name</para></listitem> +</varlistentry> +<varlistentry> +<term><parameter>%s</parameter></term> +<listitem><para>operating system</para></listitem> +</varlistentry> +<varlistentry> +<term><parameter>%r</parameter></term> +<listitem><para>operating system version</para></listitem> +</varlistentry> +<varlistentry> +<term><parameter>%m</parameter></term> +<listitem><para>machine (hardware) type</para></listitem> +</varlistentry> +<varlistentry> +<term><parameter>%%</parameter></term> +<listitem><para>a single <literal>%</literal></para></listitem> +</varlistentry> +</variablelist> +</para> +<para>The default is <quote>Welcome to %s at %n</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-antialiasing"><option>AntiAliasing</option></term> +<listitem> +<para> +Whether the fonts used in the greeter should be antialiased. +</para> +<para>The default is <quote>false</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-greetfont"><option>GreetFont</option></term> +<listitem> +<para> +The font for the greeter headline. +</para> +<para>The default is <quote>Serif,20,bold</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-stdfont"><option>StdFont</option></term> +<listitem> +<para> +The normal font used in the greeter. +</para> +<para>The default is <quote>Sans Serif,10</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-failfont"><option>FailFont</option></term> +<listitem> +<para> +The font used for the <quote>Login Failed</quote> message. +</para> +<para>The default is <quote>Sans Serif,10,bold</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-numlock"><option>NumLock</option></term> +<listitem> +<para> +What to do with the Num Lock modifier for the time the greeter is running: +</para> +<variablelist> +<varlistentry> +<term><parameter>Off</parameter></term> +<listitem><para>turn off</para></listitem> +</varlistentry> +<varlistentry> +<term><parameter>On</parameter></term> +<listitem><para>turn on</para></listitem> +</varlistentry> +<varlistentry> +<term><parameter>Keep</parameter></term> +<listitem><para>do not change the state</para></listitem> +</varlistentry> +</variablelist> +<para>The default is <quote>Keep</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-language"><option>Language</option></term> +<listitem> +<para> +Language and locale to use in the greeter, encoded like $<envar>LC_LANG</envar>. +</para> +<para>The default is <quote>en_US</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-usercompletion"><option>UserCompletion</option></term> +<listitem> +<para> +Enable autocompletion in the username line edit. +</para> +<para>The default is <quote>false</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-userlist"><option>UserList</option></term> +<listitem> +<para> +Show a user list with unix login names, real names, and images in the greeter. +</para> +<para>The default is <quote>true</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-showusers"><option>ShowUsers</option></term> +<listitem> +<para> +This option controls which users will be shown in the user view +(<option>UserList</option>) and/or offered for autocompletion +(<option>UserCompletion</option>). +If it is <literal>Selected</literal>, <option>SelectedUsers</option> contains +the final list of users. +If it is <literal>NotHidden</literal>, the initial user list contains all users +found on the system. Users contained in <option>HiddenUsers</option> are +removed from the list, just like all users with a UID greater than specified +in <option>MaxShowUID</option> and users with a non-zero UID less than +specified in <option>MinShowUID</option>. +Items in <option>SelectedUsers</option> and <option>HiddenUsers</option> +which are prefixed with <literal>@</literal> represent all users in the +user group named by that item. +Finally, the user list will be sorted alphabetically, if +<option>SortUsers</option> is enabled. +</para> +<para>The default is <quote>NotHidden</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-selectedusers"><option>SelectedUsers</option></term> +<listitem> +<para> +See <option>ShowUsers</option>. +</para> +<para>Empty by default.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-hiddenusers"><option>HiddenUsers</option></term> +<listitem> +<para> +See <option>ShowUsers</option>. +</para> +<para>Empty by default.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-minshowuid"><option>MinShowUID</option></term> +<listitem> +<para> +See <option>ShowUsers</option>. +</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-maxshowuid"><option>MaxShowUID</option></term> +<listitem> +<para> +See <option>ShowUsers</option>. +</para> +<para>The default is <quote>65535</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-sortusers"><option>SortUsers</option></term> +<listitem> +<para> +See <option>ShowUsers</option>. +</para> +<para>The default is <quote>true</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-facesource"><option>FaceSource</option></term> +<listitem> +<para> +If <option>UserList</option> is enabled, this specifies where &kdm; gets the +images from: +</para> +<variablelist> +<varlistentry> +<term><parameter>AdminOnly</parameter></term> +<listitem><para>from <filename><<option>FaceDir</option>>/$<envar>USER</envar>.face[.icon]</filename></para></listitem> +</varlistentry> +<varlistentry> +<term><parameter>PreferAdmin</parameter></term> +<listitem><para>prefer <<option>FaceDir</option>>, fallback on $<envar>HOME</envar></para></listitem> +</varlistentry> +<varlistentry> +<term><parameter>PreferUser</parameter></term> +<listitem><para>... and the other way round</para></listitem> +</varlistentry> +<varlistentry> +<term><parameter>UserOnly</parameter></term> +<listitem><para>from the user's <filename>$<envar>HOME</envar>/.face[.icon]</filename></para></listitem> +</varlistentry> +</variablelist> + +<para> +The images can be in any format Qt recognizes, but the filename +must match &kdm;'s expectations: <literal>.face.icon</literal> should be a +48x48 icon, while <literal>.face</literal> should be a 300x300 image. +Currently the big image is used only as a fallback and is scaled down, +but in the future it might be displayed full-size in the logo area or a +tooltip. +</para> +<para>The default is <quote>AdminOnly</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-facedir"><option>FaceDir</option></term> +<listitem> +<para> +See <option>FaceSource</option>. +</para> +<para>The default is <quote>${<envar>kde_datadir</envar>}/kdm/faces</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-preselectuser"><option>PreselectUser</option></term> +<listitem> +<para> +Specify, if/which user should be preselected for log in: +</para> +<variablelist> +<varlistentry> +<term><parameter>None</parameter></term> +<listitem><para>do not preselect any user</para></listitem> +</varlistentry> +<varlistentry> +<term><parameter>Previous</parameter></term> +<listitem><para>the user which successfully logged in last time</para></listitem> +</varlistentry> +<varlistentry> +<term><parameter>Default</parameter></term> +<listitem><para>the user specified in the <option>DefaultUser</option> option</para></listitem> +</varlistentry> +</variablelist> + +<para> +If <option>FocusPasswd</option> is enabled and a user was preselected, +the cursor is placed in the password input field automatically. +</para> +<note><para>Enabling user preselection can be considered a security hole, +as it presents a valid login name to a potential attacker, so he +<quote>only</quote> needs to guess the password. On the other hand, +one could set <option>DefaultUser</option> to a fake login name.</para></note> +<para> +</para> +<para>The default is <quote>None</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-defaultuser"><option>DefaultUser</option></term> +<listitem> +<para> +See <option>PreselectUser</option>. +</para> +<para>Empty by default.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-focuspasswd"><option>FocusPasswd</option></term> +<listitem> +<para> +See <option>PreselectUser</option>. +</para> +<para>The default is <quote>false</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-echomode"><option>EchoMode</option></term> +<listitem> +<para> +The password input fields cloak the typed in text. Specify, how to do it: +</para> +<variablelist> +<varlistentry> +<term><parameter>OneStar</parameter></term> +<listitem><para><literal>*</literal> is shown for every typed +character</para></listitem> +</varlistentry> +<varlistentry> +<term><parameter>ThreeStars</parameter></term> +<listitem><para><literal>***</literal> is shown for every typed +character</para></listitem> +</varlistentry> +<varlistentry> +<term><parameter>NoEcho</parameter></term> +<listitem><para>nothing is shown at all, the cursor does not move</para></listitem> +</varlistentry> +</variablelist> +<para>The default is <quote>OneStar</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-usebackground"><option>UseBackground</option></term> +<listitem> +<para> +If enabled, &kdm; will automatically start the <command>krootimage</command> +program to set up the background; otherwise, the <option>Setup</option> +program is responsible for the background. +</para> +<para>The default is <quote>true</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-backgroundcfg"><option>BackgroundCfg</option></term> +<listitem> +<para> +The configuration file to be used by <command>krootimage</command>. +It contains a section named <literal>[Desktop0]</literal> like +<filename>kdesktoprc</filename> does. Its options are not described +herein; guess their meanings or use the control center. +</para> +<para>The default is <quote>${<envar>kde_confdir</envar>}/kdm/backgroundrc</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-grabserver"><option>GrabServer</option></term> +<listitem> +<para> +To improve security, the greeter grabs the &X-Server; and then the keyboard +when it starts up. This option specifies if the &X-Server; grab should be held +for the duration of the name/password reading. When disabled, the &X-Server; +is ungrabbed after the keyboard grab succeeds; otherwise, the &X-Server; is +grabbed until just before the session begins. +</para> +<note><para>Enabling this option disables <option>UseBackground</option> and +<option>Setup</option>.</para></note> +<para> +</para> +<para>The default is <quote>false</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-grabtimeout"><option>GrabTimeout</option></term> +<listitem> +<para> +This option specifies the maximum time &kdm; will wait for the grabs to +succeed. A grab may fail if some other X-client has the &X-Server; or the +keyboard grabbed, or possibly if the network latencies are very high. You +should be cautious when raising the timeout, as a user can be spoofed by +a look-alike window on the display. If a grab fails, &kdm; kills and +restarts the &X-Server; (if possible) and the session. +</para> +<para>The default is <quote>3</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-authcomplain"><option>AuthComplain</option></term> +<listitem> +<para> +Warn, if a display has no X-authorization. This will be the case if +<itemizedlist> + <listitem><para> + the authorization file for a local &X-Server; could not be created, + </para></listitem> + <listitem><para> + a remote display from &XDMCP; did not request any authorization or + </para></listitem> + <listitem><para> + the display is a <quote>foreign</quote> display specified in + <option>StaticServers</option>. + </para></listitem> +</itemizedlist> +</para> +<para>The default is <quote>true</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-loginmode"><option>LoginMode</option></term> +<listitem> +<para> +Specify whether the greeter of local displays should start up in host chooser +(remote) or login (local) mode and whether it is allowed to switch to the +other mode. +</para> +<variablelist> +<varlistentry> +<term><parameter>LocalOnly</parameter></term> +<listitem><para>only local login possible</para></listitem> +</varlistentry> +<varlistentry> +<term><parameter>DefaultLocal</parameter></term> +<listitem><para>start up in local mode, but allow switching to remote mode</para></listitem> +</varlistentry> +<varlistentry> +<term><parameter>DefaultRemote</parameter></term> +<listitem><para>... and the other way round</para></listitem> +</varlistentry> +<varlistentry> +<term><parameter>RemoteOnly</parameter></term> +<listitem><para>only choice of remote host possible</para></listitem> +</varlistentry> +</variablelist> +<para>The default is <quote>LocalOnly</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-chooserhosts"><option>ChooserHosts</option></term> +<listitem> +<para> +A list of hosts to be automatically added to the remote login menu. +The special name <literal>*</literal> means broadcast. +Has no effect if <option>LoginMode</option> is <literal>LocalOnly</literal>. +</para> +<para>The default is <quote>*</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-forgingseed"><option>ForgingSeed</option></term> +<listitem> +<para> +Use this number as a random seed when forging saved session types, etc. of +unknown users. This is used to avoid telling an attacker about existing users +by reverse conclusion. This value should be random but constant across the +login domain. +</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-showlog"><option>ShowLog</option></term> +<listitem> +<para> +Enable &kdm;'s built-in <command>xconsole</command>. +Note that this can be enabled for only one display at a time. +This option is available only if &kdm; was <command>configure</command>d +with <option>--enable-kdm-xconsole</option>. +</para> +<para>The default is <quote>false</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-logsource"><option>LogSource</option></term> +<listitem> +<para> +The data source for &kdm;'s built-in <command>xconsole</command>. +If empty, a console log redirection is requested from +<filename>/dev/console</filename>. +Has no effect if <option>ShowLog</option> is disabled. +</para> +<para>Empty by default.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-pluginslogin"><option>PluginsLogin</option></term> +<listitem> +<para> +Specify conversation plugins for the login dialog; the first in the list +is selected initially. +Each plugin can be specified as a base name (which expands to +<filename>$<envar>kde_modulesdir</envar>/kgreet_<replaceable>base</replaceable></filename>) +or as a full pathname. +</para><para> +Conversation plugins are modules for the greeter which obtain authentication +data from the user. Currently only the <literal>classic</literal> plugin is +shipped with &kde;; it presents the well-known username and password form. +</para> +<para>The default is <quote>classic</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-pluginsshutdown"><option>PluginsShutdown</option></term> +<listitem> +<para> +Same as <option>PluginsLogin</option>, but for the shutdown dialog. +</para> +<para>The default is <quote>classic</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-pluginoptions"><option>PluginOptions</option></term> +<listitem> +<para> +A list of options of the form +<replaceable>Key</replaceable><literal>=</literal><replaceable>Value</replaceable>. +The conversation plugins can query these settings; it is up to them what +possible keys are. +</para> +<para>Empty by default.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-allowconsole"><option>AllowConsole</option></term> +<listitem> +<para> +Show the <guilabel>Console Login</guilabel> action in the greeter (if <option>ServerTTY</option>/<option>ConsoleTTYs</option> +is configured). +</para> +<para>The default is <quote>true</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-allowclose"><option>AllowClose</option></term> +<listitem> +<para> +Show the <guilabel>Restart X Server</guilabel>/<guilabel>Close Connection</guilabel> action in the greeter. +</para> +<para>The default is <quote>true</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-preloader"><option>Preloader</option></term> +<listitem> +<para> +A program to run while the greeter is visible. It is supposed to preload +as much as possible of the session that is going to be started (most +probably). +</para> +<para>Empty by default.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-usetheme"><option>UseTheme</option></term> +<listitem> +<para> +Whether the greeter should be themed. +</para> +<para>The default is <quote>false</quote>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term id="option-theme"><option>Theme</option></term> +<listitem> +<para> +The theme to use for the greeter. Can point to either a directory or an XML +file. +</para> +<para>Empty by default.</para> +</listitem> +</varlistentry> + +</variablelist> +</sect2> + + + +</sect1> + +<sect1 id="kdmrc-xservers"> +<title>Specifying permanent &X-Server;s</title> + +<para>Each entry in the <option>StaticServers</option> list indicates a +display which should constantly be +managed and which is not using &XDMCP;. This method is typically used only for +local &X-Server;s that are started by &kdm;, but &kdm; can manage externally +started (<quote>foreign</quote>) &X-Server;s as well, may they run on the +local machine or rather remotely.</para> + +<para>The formal syntax of a specification is +<screen> +<userinput><replaceable>display name</replaceable> [<literal>_</literal><replaceable>display class</replaceable>]</userinput> +</screen> +for all &X-Server;s. <quote>Foreign</quote> displays differ in having +a host name in the display name, may it be <literal>localhost</literal>.</para> + +<para>The <replaceable>display name</replaceable> must be something that can +be passed in the <option>-display</option> option to an X program. This string +is used to generate the display-specific section names, so be careful to match +the names. +The display name of &XDMCP; displays is derived from the display's address by +reverse host name resolution. For configuration purposes, the +<literal>localhost</literal> prefix from locally running &XDMCP; displays is +<emphasis>not</emphasis> stripped to make them distinguishable from local +&X-Server;s started by &kdm;.</para> + +<para>The <replaceable>display class</replaceable> portion is also used in the +display-specific sections. This is useful if you have a large collection of +similar displays (such as a corral of X terminals) and would like to set +options for groups of them. +When using &XDMCP;, the display is required to specify the display class, +so the manual for your particular X terminal should document the display +class string for your device. If it does not, you can run &kdm; in debug +mode and <command>grep</command> the log for <quote>class</quote>.</para> + +<para>The displays specified in <option>ReserveServers</option> will not be +started when &kdm; starts up, but when it is explicitly requested via +the command socket (or <acronym>FiFo</acronym>). +If reserve displays are specified, the &kde; menu will have a +<guilabel>Start New Session</guilabel> item near the bottom; use that to +activate a reserve display with a new login session. The monitor will switch +to the new display, and you will have a minute to login. If there are no more +reserve displays available, the menu item will be disabled.</para> + +<para>When &kdm; starts a session, it sets up authorization data for the +&X-Server;. For local servers, &kdm; passes +<command><option>-auth</option> <filename><replaceable>filename</replaceable></filename></command> +on the &X-Server;'s command line to point it at its authorization data. +For &XDMCP; displays, &kdm; passes the authorization data to the &X-Server; +via the <quote>Accept</quote> &XDMCP; message.</para> + +</sect1> + +<sect1 id="kdmrc-xaccess"> +<title>&XDMCP; access control</title> + +<para>The file specified by the <option>AccessFile</option> option provides +information which &kdm; uses to control access from displays requesting service +via &XDMCP;. +The file contains four types of entries: entries which control the response +to <quote>Direct</quote> and <quote>Broadcast</quote> queries, entries which +control the response to <quote>Indirect</quote> queries, macro definitions for +<quote>Indirect</quote> entries, and entries which control on which network +interfaces &kdm; listens for &XDMCP; queries. +Blank lines are ignored, <literal>#</literal> is treated as a comment +delimiter causing the rest of that line to be ignored, and <literal>\</literal> +causes an immediately following newline to be ignored, allowing indirect host +lists to span multiple lines. +</para> + +<para>The format of the <quote>Direct</quote> entries is simple, either a +host name or a pattern, which is compared against the host name of the display +device. +Patterns are distinguished from host names by the inclusion of one or more +meta characters; <literal>*</literal> matches any sequence of 0 or more +characters, and <literal>?</literal> matches any single character. +If the entry is a host name, all comparisons are done using network addresses, +so any name which converts to the correct network address may be used. Note +that only the first network address returned for a host name is used. +For patterns, only canonical host names are used in the comparison, so ensure +that you do not attempt to match aliases. +Host names from &XDMCP; queries always contain the local domain name +even if the reverse lookup returns a short name, so you can use +patterns for the local domain. +Preceding the entry with a <literal>!</literal> character causes hosts which +match that entry to be excluded. +To only respond to <quote>Direct</quote> queries for a host or pattern, +it can be followed by the optional <literal>NOBROADCAST</literal> keyword. +This can be used to prevent a &kdm; server from appearing on menus based on +<quote>Broadcast</quote> queries.</para> + +<para>An <quote>Indirect</quote> entry also contains a host name or pattern, +but follows it with a list of host names or macros to which the queries +should be forwarded. <quote>Indirect</quote> entries can be excluding as well, +in which case a (valid) dummy host name must be supplied to make the entry +distinguishable from a <quote>Direct</quote> entry. +If compiled with IPv6 support, multicast address groups may also be included +in the list of addresses the queries are forwarded to. +<!-- Not actually implemented! +Multicast addresses may be followed by an optional <literal>/</literal> +character and hop count. If no hop count is specified, the multicast hop count +defaults to 1, keeping the packet on the local network. For IPv4 multicasting, +the hop count is used as the TTL. +--> +If the indirect host list contains the keyword <literal>CHOOSER</literal>, +<quote>Indirect</quote> queries are not forwarded, but instead a host chooser +dialog is displayed by &kdm;. The chooser will send a <quote>Direct</quote> +query to each of the remaining host names in the list and offer a menu of +all the hosts that respond. The host list may contain the keyword +<literal>BROADCAST</literal>, to make the chooser send a +<quote>Broadcast</quote> query as well; note that on some operating systems, +UDP packets cannot be broadcast, so this feature will not work. +</para> + +<para>When checking access for a particular display host, each entry is scanned +in turn and the first matching entry determines the response. +<quote>Direct</quote> and <quote>Broadcast</quote> entries are ignored when +scanning for an <quote>Indirect</quote> entry and vice-versa.</para> + +<para>A macro definition contains a macro name and a list of host names and +other macros that the macro expands to. To distinguish macros from hostnames, +macro names start with a <literal>%</literal> character.</para> + +<para>The last entry type is the <literal>LISTEN</literal> directive. +The formal syntax is +<screen> +<userinput> <literal>LISTEN</literal> [<replaceable>interface</replaceable> [<replaceable>multicast list</replaceable>]]</userinput> +</screen> +If one or more <literal>LISTEN</literal> lines are specified, &kdm; listens +for &XDMCP; requests only on the specified interfaces. +<replaceable>interface</replaceable> may be a hostname or IP address +representing a network interface on this machine, or the wildcard +<literal>*</literal> to represent all available network interfaces. +If multicast group addresses are listed on a <literal>LISTEN</literal> line, +&kdm; joins the multicast groups on the given interface. For IPv6 multicasts, +the IANA has assigned ff0<replaceable>X</replaceable>:0:0:0:0:0:0:12b as the +permanently assigned range of multicast addresses for &XDMCP;. The +<replaceable>X</replaceable> in the prefix may be replaced by any valid scope +identifier, such as 1 for Node-Local, 2 for Link-Local, 5 for Site-Local, and +so on (see IETF RFC 2373 or its replacement for further details and scope +definitions). &kdm; defaults to listening on the Link-Local scope address +ff02:0:0:0:0:0:0:12b to most closely match the IPv4 subnet broadcast behavior. +If no <literal>LISTEN</literal> lines are given, &kdm; listens on all +interfaces and joins the default &XDMCP; IPv6 multicast group (when +compiled with IPv6 support). +To disable listening for &XDMCP; requests altogether, a +<literal>LISTEN</literal> line with no addresses may be specified, but using +the <literal>[Xdmcp]</literal> <option>Enable</option> option is preferred. +</para> + +</sect1> + +<sect1 id="kdm-scripts"> +<title>Supplementary programs</title> + +<para> +The following programs are run by &kdm; at various stages of a session. +They typically are shell scripts. +</para> + +<para> +The Setup, Startup and Reset programs are run as +<systemitem class="username">root</systemitem>, so they should be careful +about security. +Their first argument is <literal>auto</literal> if the session results +from an automatic login; otherwise, no arguments are passed to them. +</para> + +<sect2 id="kdmrc-xsetup"> +<title>Setup program</title> + +<para> +The <filename>Xsetup</filename> program is run after the &X-Server; is +started or reset, but before the greeter is offered. +This is the place to change the root background (if +<option>UseBackground</option> is disabled) or bring up other windows that +should appear on the screen along with the greeter. +</para> + +<para> +In addition to any specified by <option>ExportList</option>, +the following environment variables are passed:</para> +<variablelist> + <varlistentry> + <term>DISPLAY</term> + <listitem><para>the associated display name</para></listitem> + </varlistentry> + <varlistentry> + <term>PATH</term> + <listitem><para>the value of <option>SystemPath</option></para></listitem> + </varlistentry> + <varlistentry> + <term>SHELL</term> + <listitem><para>the value of <option>SystemShell</option></para></listitem> + </varlistentry> + <varlistentry> + <term>XAUTHORITY</term> + <listitem><para>may be set to an authority file</para></listitem> + </varlistentry> + <varlistentry> + <term>DM_CONTROL</term> + <listitem><para>the value of <option>FifoDir</option></para></listitem> + </varlistentry> +</variablelist> + +<para> Note that since &kdm; grabs the keyboard, any other windows will not be +able to receive keyboard input. They will be able to interact with the mouse, +however; beware of potential security holes here. If <option>GrabServer</option> +is set, <filename>Xsetup</filename> will not be able to connect to the display +at all. Resources for this program can be put into the file named by +<option>Resources</option>. +</para> + +</sect2> + +<sect2 id="kdmrc-xstartup"> +<title>Startup program</title> + +<para>The <filename>Xstartup</filename> program is run as +<systemitem class="username">root</systemitem> when the user logs in. +This is the place to put commands which add entries to +<filename>utmp</filename> (the <command>sessreg</command> program +may be useful here), mount users' home directories from file servers, +or abort the session if some requirements are not met (but note that on +modern systems, many of these tasks are already taken care of by +<acronym>PAM</acronym> modules).</para> + +<para>In addition to any specified by <option>ExportList</option>, +the following environment variables are passed:</para> +<variablelist> + <varlistentry> + <term>DISPLAY</term> + <listitem><para>the associated display name</para></listitem> + </varlistentry> + <varlistentry> + <term>HOME</term> + <listitem><para>the initial working directory of the user</para></listitem> + </varlistentry> + <varlistentry> + <term>LOGNAME</term> + <listitem><para>the username</para></listitem> + </varlistentry> + <varlistentry> + <term>USER</term> + <listitem><para>the username</para></listitem> + </varlistentry> + <varlistentry> + <term>PATH</term> + <listitem><para>the value of <option>SystemPath</option></para></listitem> + </varlistentry> + <varlistentry> + <term>SHELL</term> + <listitem><para>the value of <option>SystemShell</option></para></listitem> + </varlistentry> + <varlistentry> + <term>XAUTHORITY</term> + <listitem><para>may be set to an authority file</para></listitem> + </varlistentry> + <varlistentry> + <term>DM_CONTROL</term> + <listitem><para>the value of <option>FifoDir</option></para></listitem> + </varlistentry> +</variablelist> + +<para>&kdm; waits until this program exits before starting the user session. +If the exit value of this program is non-zero, &kdm; discontinues the session +and starts another authentication cycle.</para> + +</sect2> + +<sect2 id="kdmrc-xsession"> +<title>Session program</title> + +<para>The <filename>Xsession</filename> program is the command which is run +as the user's session. It is run with the permissions of the authorized user. +One of the keywords <literal>failsafe</literal>, <literal>default</literal> +or <literal>custom</literal>, or a string to <command>eval</command> by a +Bourne-compatible shell is passed as the first argument.</para> + +<para>In addition to any specified by <option>ExportList</option>, +the following environment variables are passed:</para> +<variablelist> + <varlistentry> + <term>DISPLAY</term> + <listitem><para>the associated display name</para></listitem> + </varlistentry> + <varlistentry> + <term>HOME</term> + <listitem><para>the initial working directory of the user</para></listitem> + </varlistentry> + <varlistentry> + <term>LOGNAME</term> + <listitem><para>the username</para></listitem> + </varlistentry> + <varlistentry> + <term>USER</term> + <listitem><para>the username</para></listitem> + </varlistentry> + <varlistentry> + <term>PATH</term> + <listitem><para>the value of <option>UserPath</option> + (or <option>SystemPath</option> for + <systemitem class="username">root</systemitem> user sessions)</para> + </listitem> + </varlistentry> + <varlistentry> + <term>SHELL</term> + <listitem><para>the user's default shell</para></listitem> + </varlistentry> + <varlistentry> + <term>XAUTHORITY</term> + <listitem><para>may be set to a non-standard authority file</para></listitem> + </varlistentry> + <varlistentry> + <term>KRBTKFILE</term> + <listitem><para>may be set to a Kerberos4 credentials cache name</para> + </listitem> + </varlistentry> + <varlistentry> + <term>KRB5CCNAME</term> + <listitem><para>may be set to a Kerberos5 credentials cache name</para> + </listitem> + </varlistentry> + <varlistentry> + <term>DM_CONTROL</term> + <listitem><para>the value of <option>FifoDir</option></para></listitem> + </varlistentry> + <varlistentry> + <term>XDM_MANAGED</term> + <listitem><para>will contain a comma-separated list of parameters the + session might find interesting, like the location of the command + <acronym>FiFo</acronym> and its capabilities, and which conversation + plugin was used for the login</para> + </listitem> + </varlistentry> + <varlistentry> + <term>DESKTOP_SESSION</term> + <listitem><para>the name of the session the user has chosen to run</para> + </listitem> + </varlistentry> +</variablelist> + +</sect2> + +<sect2 id="kdmrc-xreset"> +<title>Reset program</title> + +<para>Symmetrical with <filename>Xstartup</filename>, the +<filename>Xreset</filename> program is run after the user session has +terminated. Run as <systemitem class="username">root</systemitem>, it should +contain commands that undo the effects of commands in +<filename>Xstartup</filename>, removing entries from <filename>utmp</filename> +or unmounting directories from file servers.</para> + +<para>The environment variables that were passed to +<filename>Xstartup</filename> are also passed to <filename>Xreset</filename>. +</para> + +</sect2> + +</sect1> + +</chapter> |