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- From: veit@du9ds3.fb9dv.uni-duisburg.de (Holger Veit)
- Newsgroups: comp.unix.bsd
- Subject: On patchkit and large fixes (was: XFree86...)
- Date: 17 Nov 92 07:54:18 GMT
- Organization: Uni-Duisburg FB9 Datenverarbeitung
- Lines: 111
- Message-ID: <veit.721986858@du9ds3>
- References: <veit.721670337@du9ds3> <STARK.92Nov14094333@sbstark.cs.sunysb.edu> <veit.721901127@du9ds3> <1992Nov16.222149.4904@fcom.cc.utah.edu>
- Reply-To: veit@du9ds3.uni-duisburg.de
- NNTP-Posting-Host: du9ds3.fb9dv.uni-duisburg.de
-
- In <1992Nov16.222149.4904@fcom.cc.utah.edu> terry@cs.weber.edu (A Wizard of Earth C) writes:
-
- >In article <veit.721901127@du9ds3> veit@du9ds3.uni-duisburg.de writes:
- >>In <STARK.92Nov14094333@sbstark.cs.sunysb.edu> stark@cs.sunysb.edu (Gene Stark) writes:
- [...on "codrv", an alternative console device with (currently) emphasis on
- X11 support, integration into the patchkit, and patches pending...]
-
- >By all means, send your 50-60 patches to Nate or myself, or put them on
- >ref.tfs.com, and we'll grab them! I think the long delay in putting out
- >new patches has beenlargely due to Nate and I being confused
- >over who's going to integrate patches first.
-
- Most of these 50-60 patches, I mentioned were already published in c.u.b.,
- so you should be aware of them. The essential patch that is included in
- the codrv package, fixes the problem that pty's are further used after
- closing the device, causing the console to hang after return from X. I sent
- this fix to Nate, but even with the enclosed explanation it seems nobody
- has ever done something with it. This may be because of the "confusion"
- you mentioned above.
-
- >>The idea of codrv was the avoidance of these "small, reliable patches".
- >>Natural growth of software was rarely a good base of software development.
- >>You might not need keyboard overloading, others might, you may require
- >>bell and keyboard fixes, others do not, but they might want to have other
- >>"bells and whistles". So how would you find an integration platform (I
- >>guess you won't, or at least haven't thought about it yet)? Codrv is
- >>a product for the future, not for current restricted requirements. This is
- >>why it has been marked "incomplete".
-
- >This touches a sacred cow of mine, which is configuration. There is
- >absolutely no reason why you should not be able to pick one of several
- >console drivers, several of many ethernet drivers, or one or more disk
- >drivers from those available.
-
- I agree completely. I offered this driver to the community, because I think
- that it is an improvement over the existing one. It is quite natural to defend
- one's own work, but I don't force anyone to use it. Normally, there is
- "no problem" to replace one ethernet driver with another for the same board,
- and it is strongly recommended to take the one with the highest throughput.
- This holds for SCSIand other disk drivers as well. The problem with the
- console driver is a bit different: There may be - and there are - a number
- of builtin functions (ioctl's) in particular, which must be there for
- some important task, but unfortunately make software that uses them very
- driver dependent. It is unfortunately not possible to extract some good
- feature, such as font loading, from codrv, without also taking part of
- the ESC-sequence handler (because font switching uses ESC codes). For some
- things this works: the "Setbell" or "keyboard LED" code fragments are
- quite independent. No problem to build a patch to insert this into pccons,
- but this fix will be in there forever. In the long term you might get
- a "pccons with old X support and bells and whistles", one with VT100 emulator,
- one for X11, one with multiple virtual screens, etc. I would not maintain
- a user application which must first detect which driver it has, and then
- enable or disable special features.
-
- >It should be possible to run "codrv" and still maintain the current
- >patch level of pccons without effecting it adversely (or even using the
- >pccons code at all if you don't want to.
-
- Codrv carries the old pccons with it (with an encapsulation, that allows
- building a kernel with only one of codrv and pccons), the original patches
- (with some interleave) can still be applied to this file.
-
- > SVR4 definitely has Berkeley
- >beat in this area; at a minimum, the files.i386 file ought to be
- >created from a set of specific "drop in" files to allow drop in (if not
- >drop out) of new driver/file system modules. Some of this is apparently
- >being addressed in 0.2 from what I hear, but loadable modules don't go
- >sufficiently far in this direction.
-
- I also heard of Bill's plans, but it is to early to decide now what will
- go and what won't. Truly loadable and unloadable modules could help
- (Regarding the former discussion on that topic, I am beginning to change
- my opinion, don't be surprised).
-
- >It's true that good software tends to be revolutionary instead of
- >evolutionary (exceptions for BSD and vi 8-)), and there should be some
- >kind of non-conflicting drop-in mechanism for new kernel subsystems
- >(like codrv). I'm not suggesting a "micro" kernel, but a layered
- >approach couldn't hurt. One thing I'd like to see is a binary command
- >line configurator so that, unlike SVR4, we don't have to rebuild all
- >of our "space.c" equivalents each time.
-
- >Another thing that would help is a packaging/versioning tool, such as is
- >provided by SCO, and a logical break-up into "packages" (other than etc,
- >bin, and src) for the software we normally see on 386BSD.
-
- I would also consider this to be a fine extension.
-
- >Meanwhile, keep posting/uploading/mailing/ftping patches until we (the
- >users of 386BSD) can get something more permanent worked out.
-
-
- > Terry Lambert
- > terry@icarus.weber.edu
- > terry_lambert@novell.com
- >---
- >Any opinions in this posting are my own and not those of my present
- >or previous employers.
- >--
- >-------------------------------------------------------------------------------
- > "I have an 8 user poetic license" - me
- > Get the 386bsd FAQ from agate.berkeley.edu:/pub/386BSD/386bsd-0.1/unofficial
- >-------------------------------------------------------------------------------
-
- Holger
-
- --
- | | / Dr. Holger Veit | INTERNET: veit@du9ds3.fb9dv.uni-duisburg.de
- |__| / University of Duisburg | "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
- | | / Dept. of Electr. Eng. | Sorry, the above really good fortune has
- | |/ Inst. f. Dataprocessing | been CENSORED because of obscenity"
-