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'''olpc-utils''' is a collection of OLPC-specific utilities and configurations.
== olpc-utils localization and configuration subsystem ==


Source:
The current configuration scheme is implemented in [http://dev.laptop.org/git/projects/olpc-utils olpc-utils]
* git://dev.laptop.org/projects/olpc-utils
(before, it was scattered through initscripts, sugar and pilgrim).
* http://dev.laptop.org/git/projects/olpc-utils
* http://dev.laptop.org/pub/source/olpc-utils/


Current maintainer: [[User:Quozl|James Cameron]]
We strive to minimize the number of system files we write to,
and keep our deviations from Linux as backwards compatible
as possible. User controlled files are kept in /home/olpc, so
they get automatically preserved on updates.


Questions and contributions should be sent to the devel [[Mailing lists|mailing list]].


=== Configuration files ===
== Contents ==


=== olpc-configure ===
; <tt>/home/olpc/.i18n</tt>: Contains the LANG tag for the olpc user session


Runs early at system boot to do some OLPC-specific initializations and the first-boot configuration.
; <tt>/etc/sysconfig/i18n</tt>: Used only for the system startup scripts and daemons. Should always contain <tt>LANG=C</tt> for performance reasons.

; <tt>/etc/sysconfig/keyboard</tt>: Contains the keyboard configuration for X11 (XKB) and for the Linux console. Can be overridden per-user by creating a file named <tt>/home/olpc/.kbd</tt>.


=== /etc/init.d/olpc-configure ===

Runs early at system boot to do some OLPC-specific
initializations and the first-boot configuration.


The first-boot configuration is conditionalized on the <tt>/home/olpc/.olpc-configured</tt> flag.
The first-boot configuration is conditionalized on the <tt>/home/olpc/.olpc-configured</tt> flag.
Line 28: Line 20:
olpc-configure writes language and keyboard settings to <tt>/home/olpc/.i18n</tt>, overridable by users.
olpc-configure writes language and keyboard settings to <tt>/home/olpc/.i18n</tt>, overridable by users.


<tt>/etc/sysconfig/keyboard</tt> is programmed with keyboard information from the manufacturing data. We preferably specify XKB keyboards with the <tt>layout(variant)</tt> syntax because it's more intuitive when you have two or multiple layouts. The separate layout and variant syntax is still supported.
<tt>/etc/sysconfig/i18n</tt> is only used by initscripts, and
should contain LANG=C for improved performance (cuts 5-6 seconds from the boot).


=== /usr/share/olpc-utils/xorg.conf.d ===
We preferably specify XKB keyboards with the <tt>layout(variant)</tt>
syntax because it's more intuitive when you have two or multiple
layouts. The separate layout and variant syntax is still supported.


This directory contains X configuration files for the various XO laptop models, and sisusbvga output.
For MP machines, we set the keyboard directly from mfg data,
without a hardcoded table to map mfg tags to XKB layout names.


olpc-configure maintains hardlinks to these files in /etc/xorg.conf.d, dynamically configured on each boot.
The Linux console keyboard is still not being set accordingly.
Not sure if we really want to do it. Power users can run loadkeys
themselves if they really want to.


=== /etc/X11/xorg.conf ===

xorg.conf is now a symlink created by olpc-configure,
pointing to one of two possible fixed configuration files,
that don't need exceptional handling for the update process.

We still handle some differences between Geode+DCON and
emulators. I'd like to get X to autodetect these things
better so we could kill off the configuration files altogether.

We're currently missing a way to allow user customizations in
xorg.conf. In the future, we could make olpc-dm check for
<tt>/home/olpc/.xorg.conf</tt> and use it if present.
On the other hand, customizing xorg.conf is for power users
who may also want to customize other <tt>/etc</tt> entries.
So if we really want to support these use cases, we'd be better
off finding a generic way to preserve user customizations.


It is our hope that these configurations shrink with time to the point where they can just exist as one static file.


=== /usr/sbin/olpc-dm ===
=== /usr/sbin/olpc-dm ===


This is our ''display manager'', a streamlined equivalent of
This is our ''display manager'', a streamlined equivalent of GDM or KDM.
GDM or KDM. So streamlined that it doesn't even have a UI.
It could be extented to support multiple users, XDMCP and other
fancy things.

olpc-dm currently spawns the X server and the session through
startx and xinit, but there are plans to make it do it directly.
This will also allow us to do something smarter than SysVinit's
once/respawn modes for restarting X.

'''BUG''': olpc-dm still hogs the console and dies when you hit <tt>^C</tt>.
The fix is not a one-liner, and it's not a critical bug, but
we're planning to fix it some day.


=== /usr/bin/olpc-session ===
=== /usr/bin/olpc-session ===


This is responsible for launching the configured shell (Sugar/GNOME).
This script replaces <tt>/home/olpc/.xinitrc</tt>. It sources
<tt>/home/olpc/.i18n</tt> for $LANG, $XKB_LAYOUT and, optionally,
$XKB_VARIANT.

The last action olpc-session does is spawning the Sugar shell.


=== /home/olpc/.xsession ===

This is an "extensibility hook" for customizing your session.
It gets sourced near the end of <tt>/usr/bin/olpc-session</tt>.
A default is provided as .xsession-example, with some tips
you may want to review.

This file also replaces the old <tt>/home/olpc/.sugar.debug</tt>


== Related pages ==
* [[Localization]]
* [[XO_l10n]]


[[Category:XO localization]]
[[Category:XO startup]]
[[Category:XO startup]]

Latest revision as of 02:37, 21 October 2014

olpc-utils is a collection of OLPC-specific utilities and configurations.

Source:

Current maintainer: James Cameron

Questions and contributions should be sent to the devel mailing list.

Contents

olpc-configure

Runs early at system boot to do some OLPC-specific initializations and the first-boot configuration.

The first-boot configuration is conditionalized on the /home/olpc/.olpc-configured flag.

olpc-configure writes language and keyboard settings to /home/olpc/.i18n, overridable by users.

/etc/sysconfig/keyboard is programmed with keyboard information from the manufacturing data. We preferably specify XKB keyboards with the layout(variant) syntax because it's more intuitive when you have two or multiple layouts. The separate layout and variant syntax is still supported.

/usr/share/olpc-utils/xorg.conf.d

This directory contains X configuration files for the various XO laptop models, and sisusbvga output.

olpc-configure maintains hardlinks to these files in /etc/xorg.conf.d, dynamically configured on each boot.

It is our hope that these configurations shrink with time to the point where they can just exist as one static file.

/usr/sbin/olpc-dm

This is our display manager, a streamlined equivalent of GDM or KDM.

/usr/bin/olpc-session

This is responsible for launching the configured shell (Sugar/GNOME).