[johannes@caldera.de: Comments on Chapter 17 (cron) of the LSB Spec]
The following proposal was made a few months ago, and drew no comments.
I'm reposting this an attempt to (re)start the discussion on this
proposal, since Johannes as sent me patches which implement his
suggestions with the request that they be checked in, and I'm loathe to
do that without at least someone saying that they agree with his
proposal.
Please say "yay" if you like it; and if you don't please describe what
you don't like about it.
Many thanks,
- Ted
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Date: Mon, 12 Jun 2000 07:12:58 +0200
From: Johannes Poehlmann <johannes@caldera.de>
To: lsb-spec@lists.linuxbase.org
Subject: Comments on Chapter 17 (cron) of the LSB Spec
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Comments on Chapter 17 (cron) of the LSB Spec
=============================================
1 It is desirable to control the order of execution of the scripts
put in one of the "periodic scripts directories" ( /etc/cron.daily etc.).
This can be done by adapting the naming scheme inside /etc/init.d,
using two digit prefixes, which control the order of execution.
2 It should be possible to move the scripts from one "periodic scripts dir."
to one other, to control frequency of execution.
3. Both requirements 1. and 2. make it difficult for package managers to
cleanly remove or update because the script names and path can change.
4. This is why Caldera uses a common cron script repository
(/etc/cron.d/lib in OpenLinux 2.4) and uses soft links to these
repository from the periodic scripts directories. (modeled
after /etc/init.d/) The soft links must be named XXname, where
XX is 2 digits and name is the name of the script pointed to.
Example: /etc/cron.d/Daily/40cleandir ->../lib/cleandir
The local system administrator now can rename and move these
soft links inside the periodic scripts directories, but the
package manager can get the information which soft links point
to which script. As the scripts are part of a package, the
package manager could completely control these soft links.
5. /etc Name space pollution
The actual proposal enforces 5 cron related directories in /etc.
(Or even 6 if our cron script repository idea is used). This can
get even worse, if somebody wishes more periodic scripts directories,
say /etc/cron.biweekly.
This is why we propose to keep the historical place /etc/cron.d/
and put the following directories inside:
/etc/cron.d/
&
+-Monthly periodic scripts directories (Capitalized Names)
+-Weekly
+-Daily
+-Hourly
+-[A-Z]* more periodic scripts directories allowed
|
+-scripts cron scripts repository
+-tabs cron tab snippets dropped by packages
( is /etc/cron.d in the lsb-spec )
- --
______ ___
/ ___/__/ / Caldera (Deutschland) GmbH
/ /_/ _ / /__ Naegelsbachstr. 49c, 91052 Erlangen, Germany
/_____/_/ /____/ software developer / lsb project
==== /____/ ===== Dipl. Inf. Johannes Poehlmann, mail: jhp@caldera.de
Caldera OpenLinux phone: ++49 9131 7192 336, fax: ++49 9131 7192 399
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