82 lines
2.9 KiB
HTML
82 lines
2.9 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
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<HTML>
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<HEAD>
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<META NAME="GENERATOR" CONTENT="SGML-Tools 1.0.9">
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<TITLE>PATH HOWTO: XFree86</TITLE>
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<LINK HREF="Path-10.html" REL=next>
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<LINK HREF="Path-8.html" REL=previous>
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<LINK HREF="Path.html#toc9" REL=contents>
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</HEAD>
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<BODY>
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<A HREF="Path-10.html">Next</A>
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<A HREF="Path-8.html">Previous</A>
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<A HREF="Path.html#toc9">Contents</A>
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<HR>
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<H2><A NAME="s9">9. XFree86</A></H2>
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<P>
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<P>
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<H2><A NAME="ss9.1">9.1 XDM</A>
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</H2>
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<P>
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<P>XDM is the most common way to log in to a graphical terminal. It a bit
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looks like login but it is internally totally different.
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<P>In directory /etc/X11/xdm there are configuration files that are
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executed on different login phases. Xstartup (and Xstartup_0 specially
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for screen 0) contains commands to be run after the user has logged in
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(commands are run as user root).
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<P>The path that is set for users is in /etc/X11/xdm/xdm-config. There
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are lines:
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<P>
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<BLOCKQUOTE><CODE>
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<PRE>
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DisplayManager*userPath: /usr/local/bin:/usr/bin:/bin:/usr/bin/X11:/usr/games
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DisplayManager*systemPath: /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/bin/X11
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</PRE>
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</CODE></BLOCKQUOTE>
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<P>That will be a default path for normal and root users respectively. It
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is very important that /usr/bin/X11 is available for X users. If X
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user logs in to another machine to start and X client application, he
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should get /usr/bin/X11 to his path even he don't seem to come
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directly from X terminal.
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<P>After running Xstartup the XDM runs /etc/X11/Xsession that is run as
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the final user. Local configuration is meant to be done in
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/etc/environment that is sourced (included) from Xsession if available
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(Xsession is run with /bin/sh and thus /etc/environment must be a sh
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file). This clashes with ssh that supposes that /etc/environment is a
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file that contains just lines of form VAR=VALUE.
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<P>
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<P>
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<H2><A NAME="ss9.2">9.2 xterm -ls</A>
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</H2>
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<P>
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<P>By default the path for all the commands invoked from X window manager
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menus is the path inherited from XDM. To use something different it
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must be set explicitly. To start a terminal emulator with a path that
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is "normal" some special option must be used. In xterm the option -ls
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(login shell) must be used to get a login shell with path specified in
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shell login initialization files.
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<P>
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<P>
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<H2><A NAME="ss9.3">9.3 Window manager menus and buttons</A>
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</H2>
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<P>
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<P>Window manager inherits environment of XDM. All the programs started
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by the window manager inherit the environment of the window manager.
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<P>User shell environment does not affect the programs that are started
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from window manager buttons and menus. For example, if program is
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started from 'xterm -ls', it has the default environment of login
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shell but if it is started from menu, it has just environment of the
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window manager.
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<P>
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<P>
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<HR>
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<A HREF="Path-10.html">Next</A>
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<A HREF="Path-8.html">Previous</A>
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<A HREF="Path.html#toc9">Contents</A>
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</BODY>
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</HTML>
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