Sorry if a repost
Hi,
Whith the release of dachstein CD (I didn't tried it yet), I think it's time
to explain what
I am coding now. ( It's not yet ready for a release but you can get the
ideas.
I might be usefull to store config files on a floppy
Introduction:
I consider myself as a 'semi-idiot' creating EigerStein/Dachstein for a
dozen of "super-idiots"
All of them have the same kind of Internet connexion (ADSL with pppoe).
Some of them wanted to have secure tunnels between 2 leaf so I had the
requirement to change
the internal network addressing quite easily
Goal:
- How to keep the configurations files separate from the rest of the
packages
- How to manage the modifications made to configuration file so that I can
remember what I did
some months before.
- How to ease some manipulations of the config files
Acknowoledgments
I stole a lot of ideas from Oxygen, EigerStein, Dachstien, fli4l.... And
added a few of mine ;-)
I want to thanks the LRP/LEAF gurus for building such a great thing...)
the leaf project is really a gold mine for the one who wants to learn shell
programming
Design
The Main idea is to keep copies of modified configuration files in the
/myconfig directory
copy them in the right place early in the boot process.
the template of config files contains tags that can be replaced by the
actual values stored
in a file on the boot device (out of the .lrp easier to edit whithout
booting the floppy)
Description
I've built a package called MYCONFIG.LRP that contains
-- a directory called
/myconfig
/bin : some scripts
/templates : templates of config files stored in subdirectories
bu package name
(see templates.conf)
/sbin : some scripts copied to /usr/local/sbin ( tools)
/config : folder containing the copy of the config directory
stored on the boot
filesystem out of the packages
myconfig.txt contains variables definitions
/scripts : scripts that are called by the unconfigured.sh to
setup things that cannot
be done with the templates ( creating the
dnscache file /etc/dnscache/root/ip/internal net
-- a script in /sbin/unconfigured.sh
Files:
/myconfig/templates.conf
This file describes the templates. it has the following format
Package template destination owner group perm
package: package owning this config file
template: name of template in the /myconfig/templates/$package directory
destination: full path name where the file must be put
owner group perm ( if present, chown chgrp chmod are done on the dest
file
/sbin/unconfigured.sh
this script (if present, of course ) is called by the boot process after
packages extractions and before the /etc/init.d
it calls /myconfig/bin/setup.sh ( todo: change this filename)
/myconfig/bin/setup.sh
this scripts does the following
- temporarly mount /proc because it will be mounted later during the boot
- mount boot device
- install all package stored in /boot/addons ( to overcome the command line
lenght limit)
- look in /boot/config for the first file named *.cfg (eg. a.cfg )
- if found copy it as /myconfig/config/myconfig.txt
- copy all files from /boot/config/a/*.* to /myconfig/templates/config
that way I can store out of the packages all configuration data
- variables from myconfig.txt
- other templates (ssh key files...)
- call /myconfig/bin/processtemplate
- call all scripts in /myconfig/scripts
- unmount /proc and boot device
/myconfig/bin/processtemplate
this script converts the myconfig.txt file into a sed script
in: var=val
out: s/##var##/val/g
for all templates in /myconfig/templates.conf
execute the sed script write the output at destination pathname
set owner group and permissions
next
Conclusions.
It's working but not yet finished.
I wanted to store all my modifications in a new package so that a can simply
overwrite a .LRP with a new one without losing my changes.
How to use.
- basically instead of modifiying a config file from the menus, you copy the
file in
the /myconfig/template/xx.in
- edit it to use the ##tagname## if it's defined in the myconfig.txt
- or simply edit it
- backup myconfig.lrp.
if you want to upgrade a package, you can replace the old one with a new
downloaded one
and review the config file to compare it with your template.
TODO:
better comment_stripping ( remove LF if file editied in dos/win)
..bug fixes
documentation
URL:
http://users.skynet.be/Etienne.Charlier/myconfig.lrp
If this can give some ideas to the true gurus, .....
It's just a draft, I'm coding/testing before writing docs...
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