Linux-Misc Digest #216, Volume #19 Sat, 27 Feb 99 20:13:16 EST
Contents:
Re: Encryption of passwords for AuthUserFile on Apache server? ("Duane Elmer
Smeckert")
Linux Boxes & Internet (DaStOp)
Re: Best Free Unix? (why FreeBSD?) (Zenin)
BBS software for linux? ([EMAIL PROTECTED])
Re: Turning 'ping' off, please help. (Lew Pitcher)
Re: Cannot get to LILO boot: anymore (Tom Oswald)
General unix question: find & replace string in a set of files (Phillip George
Geiger)
Re: Best Free Unix? (why FreeBSD?) (david parsons)
Re: how to start programming in Linux (Bloody Viking)
Re: making bzip2 work with xman pages (Tom Phelps)
Re: glibc Netscape 4.5 dies when encounters java (Student)
Re: Should IBM port Visual Age for Java to Linux? ("news.spacelab.net")
Re: RealPlayer 5.0 on Kernel 2.2.2 (Sam Vere)
spinner.com music app for Linux ([EMAIL PROTECTED])
Re: HELP: Linux crashing with fsck error (David Kirkpatrick)
interested in linux... (Paul Erdos)
Re: Compiling Apache Jserv (Robert Lynch)
Re: Digital Cameras (Kyle Dansie)
Re: Microkernels are an abstraction inversion (Barry Margolin)
Re: Digital Cameras ("Michael Faurot")
----------------------------------------------------------------------------
From: "Duane Elmer Smeckert" <[EMAIL PROTECTED]>
Crossposted-To: comp.os.linux.admin,comp.os.linux.questions
Subject: Re: Encryption of passwords for AuthUserFile on Apache server?
Date: Sat, 27 Feb 1999 15:52:43 -0800
man crypt should help.
>How, exactly does one encrypt these
>passwords into a file other than /etc/passwd?
>I really don't want to have to write my own tool
>for this, I have too many other rods
> in the fire already.
Heh Heh, you said "rod."
------------------------------
From: DaStOp <[EMAIL PROTECTED]>
Subject: Linux Boxes & Internet
Date: Fri, 26 Feb 1999 23:43:28 GMT
I would like to know if it is possible to have 2 Linux Boxes connected via
Ethernet that share tha same modem/Internet connection simultaneously, maybe
also running XWindows.
Thank you in advance for your help. :)
Da$top
===== O ===== O ===== O ===== O ===== O ===== O ===== O ===== O =====
Check out these discussions lists:
http://www.dejanews.com/~hiphopstyle/j.xp?j=hiphopstyle
http://www.dejanews.com/~linuxandwindows/j.xp?j=linuxandwindows
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------------------------------
Subject: Re: Best Free Unix? (why FreeBSD?)
From: Zenin <[EMAIL PROTECTED]>
Crossposted-To:
comp.unix.questions,comp.unix.advocacy,comp.unix.misc,comp.unix.bsd.freebsd.misc
Date: 27 Feb 99 00:03:16 GMT
[posted & mailed]
brian moore <[EMAIL PROTECTED]> wrote:
: On 26 Feb 1999 13:58:39 -0600,
: Leslie Mikesell <[EMAIL PROTECTED]> wrote:
>snip<
: > >Even things that are non-free and have unreasonable licensing (say, RSA
: > >and Diffie-Hellman in the US until '97) managed to become standards.
: > >Try to use HTTPS without RSA.
: >
: > Try to use it along with any GPL'd code.
:
: Okay, mod_perl (which does have tons of GPL'd code)
Please show me a single line of GPL code in mod_perl, I must have
missed it. But then, I'm only human so maybe I should let a
computer look for me:
$ cd mod_perl-1.18
$ grep -il GPL `find . -type f`
$
Hmm, maybe it would work better if I used GNU grep and find?
: works great with Apache (BSD-ish license) and RSAREF (mutant license).
Yes, it does, because does not carry the GPL.
It's a bad idea to try and use nearly anything from the Perl world
as support for the GPL. Perl as well as nearly ever "free" project
created with it, is dual licensed GPL/Artistic license; The user is
allowed to choose which they would like to abide by so long as they
abide by at least one of them.
While the AL is far more restrictive then BSD, it's still light
years away from the GPL and unlike the GPL it doesn't go out of its
way to explicitly lie to its users.
>snip<
: Actually, that's the argument you have been presenting: you argue that the
: BSD license is better because it allows you to take code from others and
: not share your changes.
What right should *you* have over the life of *my* code?
--
-Zenin ([EMAIL PROTECTED]) From The Blue Camel we learn:
BSD: A psychoactive drug, popular in the 80s, probably developed at UC
Berkeley or thereabouts. Similar in many ways to the prescription-only
medication called "System V", but infinitely more useful. (Or, at least,
more fun.) The full chemical name is "Berkeley Standard Distribution".
------------------------------
From: [EMAIL PROTECTED]
Subject: BBS software for linux?
Date: Fri, 26 Feb 1999 23:09:52 GMT
I run a text based (old fashioned) BBS in DOS, and I was wanting to use linux
instead so that I have multiple incomming telnet sessions. does anybody know
of some good BBS software that is native to *nix that will run on linux RH5.1?
In addition, I am looking for FIDONET style mailers and tossers to round out
the entire system.
I'm trying to keep this all *nix native, without having to use DOSEMU to do
any of it.
So far, I've found BBBS, Waffle, and possibly LoraBBS (I have the c++ code and
makefile to compile it), but still, I have no mailer or tosser.
-Regards
Darryl Perry
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------------------------------
From: Lew Pitcher <[EMAIL PROTECTED]>
Subject: Re: Turning 'ping' off, please help.
Date: Fri, 26 Feb 1999 19:48:57 -0500
Ali Bharmal wrote:
>
> Chad M. Townsend <[EMAIL PROTECTED]> wrote:
> > If I _do not_ want my computers to return a ping (besides turning them off)
> > how to I disable ping?
>
> Firewall them or diable the UDP port (7 IIRC). How you do the latter is a
> little beyond me.
UDP port 7 is used by the 'echo' server, which has *nothing* to do with
ping (ICMP echo). A UDP packet sent to port 7 will be returned verbatim,
but this is not a ping.
You should be able to disable the echo server by removing it from your
system startup (if it's started standalone), or by removing it from your
Inetd superserver (/etc/inetd.conf). But this doesn't prevent ICMP from
generating ICMP echo replies ('ping' replies).
------------------------------
From: Tom Oswald <[EMAIL PROTECTED]>
Crossposted-To:
comp.os.ms-windows.nt.software,comp.os.ms-windows.nt.misc,comp.os.linux.networking,comp.os.linux.help,comp.os.linux,cino,is,ns-windows.nt
Subject: Re: Cannot get to LILO boot: anymore
Date: Fri, 26 Feb 1999 16:02:27 -0800
Dean Plude wrote:
>
> Michelle Xu Zhao wrote:
>
> > Hi, I installed a scanner software/drivers and rebooted
> > and found that the computer hang at printing the 'LILO boot:'
> > prompt. It will print 'LI' then hang forever.
> >
> > I used to have winnt on partition 1 and linux on partition 4
> > and run them selectively via the 'LILO boot:' manager.
> >
> > Now the boot manager seemed damaged by the scanner installation.
> >
> > And I cannot boot either of the two OS since I cannot get to
> > the prompt.
> >
> > The question is: How do I go fixing the boot manager and get
> > back the prompt? (get over the hang)
> >
> > Thanks in advance.
> >
> > Michelle
>
> Boot from rescue and then type lilo But be warned you scanner software
> had a virus on it
Make sure your bios is still set up properly. I had the same problem
when windows wrote to the bios and changed the number of sectors to a
block. Lilo does a relative offset in sectors to find the higher parts
of LILO. My Linux disk was formated with 4K per node so I had to set 8
sectors per block in the bios. The bios setting must match the node
size you used for ext2.
Tom
--
=== Tom Oswald = mailto:[EMAIL PROTECTED] = (360)817-8484 ===
Imaging Division Sharp Labs
Camas, WA, 97223
Standard Disclaimers Apply, including:
"Any ideas or opinions expressed here do not necessarily
reflect the ideas or opinions of my employer." :^)
===================================================================
------------------------------
From: [EMAIL PROTECTED] (Phillip George Geiger)
Subject: General unix question: find & replace string in a set of files
Date: 27 Feb 1999 00:54:19 GMT
I have a lot of files that need to be updated in a very similar manner.
Is there a simple (or cryptic) unix command to go through every file
in a directory, find every occurrence of "12 January" and replace it
with "26 February"? All of the files are plain old text files.
I'm just dreading the thought of opening every one of them in emacs
and doing a find and replace....
Thanks in advance!
--
Phil Geiger
[EMAIL PROTECTED]
------------------------------
From: o r c @ p e l l . p o r t l a n d . o r . u s (david parsons)
Crossposted-To:
comp.unix.questions,comp.unix.advocacy,comp.unix.misc,comp.unix.bsd.freebsd.misc
Subject: Re: Best Free Unix? (why FreeBSD?)
Date: 26 Feb 1999 15:43:08 -0800
In article <[EMAIL PROTECTED]>,
Zoltan Kocsi <[EMAIL PROTECTED]> wrote:
>I write a clone of Someprogram which is a commercial SW.
>I make lots of enhancements because I'm such a clever guy.
>If I then release it under GPL then obviously BloodyCorporation, Inc.,
>creators of Someprogram can not use my code to buff up their stuff.
Don't bet money on that assumption.
____
david parsons \bi/ Yes, I've put GPLed code into commercial products
\/ and raked in the big buck for doing it.
------------------------------
From: Bloody Viking <[EMAIL PROTECTED]>
Crossposted-To: comp.os.linux.advocacy
Subject: Re: how to start programming in Linux
Date: 28 Feb 1999 00:19:37 GMT
In comp.os.linux.advocacy Brian Moore <[EMAIL PROTECTED]> wrote:
: I have found that learning programming depends to a huge degree
: on what you are trying to accomplish. I frequently write programs
: for various numerical applications, basically numbers in <-> numbers
: out. I used to do this all in FORTRAN. When I switched over to
: linux I used f2c for a while and then finally bit the bullet
: and now do everything in C. It took a surprisingly small amount of
: time to make the switchover. But I don't really *know* C in the
: sense that most people mean when they say they know it. I'd
: be totally lost trying to write a device driver or something.
I use C mostly for math type stuff. For that, it's reasonably
straighforward. For processing text, C gets harder as it gets low-level
real quick and I lack the attention span required. I normally code for
stdin and stdout and use shell scripts to redirect stuff. I can cause C to
open a file, but I normally choose the lazy way. :) Here is one of my
classic math proggies:
---begin fat.c---
#include <stdio.h>
#include <math.h>
float mass, height, output, ideal;
main()
{
/* The Fat Programme */
/* */
/* The variables "mass" is your weight in pounds and "height" is in */
/* inches. The output of the programme is your Body Mass Index. */
printf("Enter your weight in Pounds:\n");
scanf("%f", &mass);
printf("Enter your Height in inches:\n");
scanf("%f", &height);
output = mass * 703 / (height * height);
ideal = 25 * height * height / 703;
printf("\n%f", output);
/* Fun note here is the first if-then and the strategic placement of */
/* lone printf return key afterwards. */
if(output<25)
{
printf(" is your Official Body Mass Index! Congratulations for being");
printf(" healthy!\n");
printf("You're doing America a favour!");
}
printf("\n");
/* Now, for an "if-then" routine that embeds a second one... */
if(output>=25)
{
if(output<30)
{
printf("You're a Fat Slob! Lose some weight!");
}
}
/* Now, for a simple if-then.... */
if(output>=30)
{
printf("You're a fucking blimp! What have you got to say for
yourself?\n");
printf("Lose some god damn weight NOW!!!!");
}
printf("\n");
if(output>=25)
{
printf("\n");
printf("%f pounds is how much you've got to lose, slob.", mass-ideal);
printf("\n");
}
}
---end fat.c---
This gem is the government's official body fat formula made into a C
proggie. It's GNU. Note the conditionals and the flames in the output. :)
This example is an illustration of my admittedly crude coding style. I
originally learned BASIC before I took up C. I don't know about FORTRAN,
but I do know Linux has it. So, if you feel like coding in Fortran, go
right ahead and enjoy. What is missing is a good QBASIC for Linux.
However, I found a QBASIC to C translator so if I get stuck in C, I can
code the routine in BASIC and examine the output. Then, I can edit the
output and compile. I thus get to learn some C and get the best of both
worlds with the QBASIC to C converter. I like the QBASIC to C converter
idea best. It's better than a real QBASIC as it spits out C and I can edit
the code to taste.
I used the QBASIC to C converter to learn how to make the conditionals
like in the above code. Since I use a similarly crude style in BASIC, the
output of the converter is similar to my coding style! I'm going to have
to try text manipulation with the QBASIC to C converter. Since translator
proggies create crude code, they are good for learning when you're a crude
programmer. I'm not complaining! I wouldn't be surprised if there's a
Fortran to C converter floating around out there. With it, you can have an
easier time changing over. Please note that proggies like this do have
limitations. You can't get too esoteric in the original code. In my case,
that's no problem. :)
The above sourcecode is copyrighted under the GNU Public Licence by me,
the creator.
--
CAUTION: Email Spam Killer in use. Leave this line in your reply! 152680
Humans never fly. They either ride a flying bus or drive it.
3566553 bytes of spam mail deleted. http://www.wwa.com/~nospam/
------------------------------
From: [EMAIL PROTECTED] (Tom Phelps)
Subject: Re: making bzip2 work with xman pages
Date: 27 Feb 1999 00:58:09 GMT
I haven't tested this, but if your man pages are either bzip2
compressed or uncompressed, not a mix of bzip2 and gzip comression,
then you can trivially configure TkMan, a much better man page browser
than xman (see http://www.cs.berkeley.edu/~phelps/tcltk/) to use bzip2
instead by setting a few variables in the Makefile:
zcat = "bzip -dcf"
compress = bzip
zlist = bz2
Let me know how well this works,
Tom
------------------------------
From: Student <[EMAIL PROTECTED]>
Crossposted-To: linux.debian.user
Subject: Re: glibc Netscape 4.5 dies when encounters java
Date: Sat, 27 Feb 1999 15:07:40 -0500
I would like to confirm that I have a similar problem. When trying to view a web
page
that has java or javascript, netscape crashes. I have no idea what the problem,
so I just
disable java and javascript. Any help would certainly be appreciated.
Brian
[EMAIL PROTECTED]
[EMAIL PROTECTED] wrote:
> Netscape 4.5 would just die when I visit any site that has java.
>
------------------------------
From: "news.spacelab.net" <[EMAIL PROTECTED]>
Crossposted-To: comp.os.linux,comp.os.linux.advocacy,comp.lang.smalltalk
Subject: Re: Should IBM port Visual Age for Java to Linux?
Date: Tue, 23 Feb 1999 16:21:29 -0500
Just to update this. Objectshare has released there linux
version and you can get if for free ( the nc version) or pay
just under $500 a copy for a copy.
Reality is a point of view wrote in message <7av260$eoa$[EMAIL PROTECTED]>...
>[note: crosspost added c.l.s, Cc'd tmurphy for kicks]
>
> +---- [EMAIL PROTECTED] wrote (Tue, 23 Feb 1999
10:18:54 -0600):
> | Well..in order for IBM to port VisualAge Java to Linux they would have
> | to port VisualAge Smalltalk to Linux because VA-Java is just a
> | VA-Smalltalk application. I would be heavily in favor of them porting
> | VA-Smalltalk to Linux because VA-Smalltalk is a much better development
> | tool than VA-Java anyway.
> |
> | They could probably do it fairly easily because they already have
> | VA-Smalltalk running on Windows, OS/2, AIX, Solaris, HP/UX, MVS, etc...
> +----
>
>Pressure from that other proprietary Smalltalk, ObjectShare's
>VW Smalltalk, will probably speed the port of VA Smalltalk.
>
>For those that aren't aware, VW Smalltalk for Linux has been
>announced, or possibly just preannounced. A lot of MIS style
>Smalltalkers like it. If I'm not mistaken ObjectShare intends
>to make a splash at a certain upcoming conference. If they do
>keep an eye out of 'deployment licensing' (see their
>preannoucement, posted to USENET, for previous plans to seek
>deployment fees), it hasn't been determined if they will retain
>that sort of silliness (but rumblings seem to indicate they
>will drop them, though encouragement couldn't hurt).
>
>--
>Gary Johnson [EMAIL PROTECTED]
>Privacy on the net is still illegal.
------------------------------
From: [EMAIL PROTECTED] (Sam Vere)
Subject: Re: RealPlayer 5.0 on Kernel 2.2.2
Date: Sat, 27 Feb 1999 01:03:35 GMT
Reply-To: [EMAIL PROTECTED]
On Fri, 26 Feb 1999 18:50:01 GMT, [EMAIL PROTECTED] (Bob
Schreibmaier) wrote:
>I just upgraded to kernel 2.2.2, using XFree86 3.3.3.1, and
>noticed that RealPlayer 5.0 has stopped working. It starts
>up with the usual window, but gives the dreaded "Error 1" as
>soon as it starts playing the movie.
>
>If it matters at all, this is an upgraded Slackware 3.6 system,
>running on a K6-233 with 64 MB of RAM, 128 MB of swap. It looks
>like the system has never used the swap space at all. The output
>of the /usr/src/linux/scripts/ver_linux script looks like this:
>
>-- Versions installed: (if some fields are empty or looks
>-- unusual then possibly you have very old versions)
>Linux dxis 2.2.2 #1 Fri Feb 26 11:56:47 EST 1999 i586 unknown
>Kernel modules 2.1.121
>Gnu C 2.7.2.3
>Binutils 2.8.1.0.23
>Linux C Library 5.4.46
>Dynamic linker ldd: version 1.9.9
>Procps 1.2.7
>Mount 2.7l
>Net-tools (1998-03-02)
>Kbd command
>Sh-utils 1.16
>
>Has anyone else seen this behavior? Is there a workaround?
>Besides going back to 2.0.36. 8^{)
According to the kernal docoumentation, RealPlayer 5.0 exploited a bug
in the sound system that no longer exists in the 2.2.x kernals.
I understand that steps are being taken to solve this. Perhaps they'll
upgrade it to G2 whilst they're at it...
>Thanks in advance.
You're welcome.
>Bob
<-------------------REMOVE SPAMTO TO DIRECT REPLY------------------->
[EMAIL PROTECTED] | THERE IS NO TERIYAKI, ONLY ZUUL!
[EMAIL PROTECTED] | - Akane's cooking,
| The Varaiyah Cycle
------------------------------
From: [EMAIL PROTECTED]
Subject: spinner.com music app for Linux
Date: Sat, 27 Feb 1999 23:36:09 GMT
Does anyone know if a spinner.com music player exists for Linux?
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------------------------------
From: David Kirkpatrick <[EMAIL PROTECTED]>
Subject: Re: HELP: Linux crashing with fsck error
Date: Fri, 26 Feb 1999 20:07:01 +0000
Reply-To: [EMAIL PROTECTED]
Tony,
Possibly your paritions were not made correctly at the
beginning. If this happened you can get a load and fail later as
your seeing. OR just plain old HW problem. You system is messed
up as it looks like its trying to free a page the kernel does not
own. Linux will not notmally do this when everything is running
correctly.
I had my mother board mis-strapped on advice from the vendor
and would load and run for hours then fail, crash and mess up the
file pointer so it would recover on the way up. Eventually after
several crashes over a week or two it would fail perminantly.
But when it worked it would run without problems for days. Since
the re-strapping its been up for three weeks and heavily loaded
and running fine without any problems. Just in case I include an
fdisk message.
Mem may not be seated, cables loose. Are you using consistant
applications all matched for your kernel i.e. have you loaded any
modules or binaries that may be for a different release?
[EMAIL PROTECTED] wrote:
>
> Hello,
>
> Our linux system is regularly crashing with the following error messages:
>
> Login: 0ops: 0000
> EIP: 0010:001398f6
> EFLAGS: 00010202
> eax: 00000000 ebx: 00e75915 ecx: 0000008 edx: 00e75d98
> esi: 00000000 edi: 00e75458 ebp: 00000000 esp: 001b30a0
> ds: 0018 es: 0018 fs: 002b gs: 0018 ss:0018
> Process Swapper (pid:0, process nr: 0, Stackpage=001b120c)
> Stack: 0052ece4 0052ed4a 001be1f0 00000001 00000024
> 00139de4
> 00006800
> call trace: 00139de4 00186b0f 00134e6d 0011b6ce
> code: 83 7e 14 00 74 09 8b 53 14 8b 43 18 89 42 18 6a 01 8b 43 0c
> Aiee; killing interrupt handler
> kfree of non-kmalloced memory: 001b3204, next=00000000, order=1116370
> task[0] (swapper) killed: unable to recover
> kernel panic: trying to free up swapper memory space
> in swapper task - not syncing
>
> ON REBOOT (messages):
>
> Parallelizing fsck version 0.5b (14-Feb-95)
> Duplicate a bad blocks in use!
> /dev/sda2: Unexpected consistency; Run fsck manually
>
> ********************************************
> fsck returned error code - REBOOT NOW!
> ********************************************
>
> The system then reboots on its own and starts working ok, until the next
> repeat of the crash.
>
> I have tried booting from a boot disk and then running the �e2fsck -av'
> function, but this just returns the errors as seen above.
>
> Any help that anyone can give, would be most appreciated.
>
> Thanks
> Tony
>
> -----------== Posted via Deja News, The Discussion Network ==----------
> http://www.dejanews.com/ Search, Read, Discuss, or Start Your Own
--
[EMAIL PROTECTED]
[EMAIL PROTECTED]
[EMAIL PROTECTED]
------------------------------
From: [EMAIL PROTECTED] (Paul Erdos)
Subject: interested in linux...
Date: 27 Feb 1999 07:22:45 GMT
i first heard of linux about a year ago, and it sounded interesting so i
decided to give it a try. i bought the "linux for dummies" book (since i didn't
know anything about linux, i figured that was the right book for me), which
included a cd in the back with redhat 5.0. i got it installed on my computer
no problem, as a dual-boot between linux and win95. this is probably due to my
lack of knowledge about linux, but it is not clear to me why linux is
preferable to windows. as a high school senior whose primary use of the
computer is: writing papers (ms word), programming (ms visual c++), and going
online (aol), i didn't know how to do these same things in linux. is linux
right for me, or is windows preferable for doing those limited tasks?
please don't misunderstand the intent of this message. it comes from a genuine
interest in linux, and how it might be useful in my use of the computer.
because i am completely ignorant of what linux can and cannot do, i am asking
all of you out there.
if you could email me at <[EMAIL PROTECTED]>, that would be appreciated since i
do not check this newsgroup on a regular basis.
thanx in advance for your response,
jerry
------------------------------
Date: Sat, 27 Feb 1999 16:32:48 -0800
From: Robert Lynch <[EMAIL PROTECTED]>
Crossposted-To:
comp.infosystems.www.authoring.misc,comp.infosystems.www.authoring.tools,comp.infosystems.www.misc,comp.infosystems.www.servers.unix
Subject: Re: Compiling Apache Jserv
Noel wrote:
>
> I am running Redhat Linux 5.2 with Apache 1.3. I downloaded JServ 1.0b3 but
> I am having trouble compiling. Has anyone compiled it on Redhat or is there
> an RPM for this current version.
>
> I don't have the apache source installed, and everytime I tried to run the
> configure script I got the message could not find source in . or ..
>
> Some help!
>
> Thanks in Advanced!
>
> Noel
I've done it, got running, don't remember too many problems. Have you
looked at the excellent tutorial:
http://www.magiccookie.com/computers/apache-jserv/
HTH. Bob L.
--
Robert Lynch-Berkeley CA [EMAIL PROTECTED]
http://www.best.com/~rmlynch/
------------------------------
Date: Sat, 27 Feb 1999 17:50:26 -0700
From: Kyle Dansie <[EMAIL PROTECTED]>
Crossposted-To: comp.os.linux.advocacy,comp.os.linux.hardware
Subject: Re: Digital Cameras
The Infernal One wrote:
>
> Does anyone either know or have good source information on
> which digital cameras support linux? TIA.
I plan on buying one of the Sony cameras that write to a floppy disk. I
think that the images are a standard format like gif that you can read
in Linux.
Cheers,
Kyle
--
========================================================
Linux Rules Iomega Zip Drive Mini - HOWTO
-
http://njtcom.com/dansie/zip-drive.html
or
http://metalab.unc.edu/mdw/HOWTO/mini/ZIP-Drive.html
========================================================
------------------------------
From: Barry Margolin <[EMAIL PROTECTED]>
Crossposted-To: gnu.misc.discuss,comp.os.linux.advocacy
Subject: Re: Microkernels are an abstraction inversion
Date: Sat, 27 Feb 1999 23:29:35 GMT
In article <[EMAIL PROTECTED]>,
Francois-Rene Rideau <[EMAIL PROTECTED]> wrote:
>Barry Margolin <[EMAIL PROTECTED]> writes:
>> There can also be benefits in reliability and security [in a �K].
>> In a macrokernel,
>> the potential interactions between kernel modules are almost unlimited,
>> making it very difficult to verify these attributes. A microkernel
>> typically provides a limited messaging interface between the higher layer
>> modules, and each module can be debugged independently.
>That's the typical fascist approach to programming:
>when a wrong is possible, build a barrier to FORBID the wrong,
Is there something about microkernels that FORBIDS people from adding code
to the kernel itself, rather than writing servers? I don't think so. It's
just not encouraged.
However, I do appreciate your point of view. One of my favorite systems
was the Symbolics Lisp Machine, which is the polar opposite of a
microkernel -- the entire environment, both system and user code, is a
single monolithic Lisp address space (it has things called "processes", but
they're like what we now call threads). Reliability was achieved through
the use of Lisp as the implementation language; it doesn't have explicit
pointers (although they added pointer-like objects for use by low-level OS
code, so it's possible to bypass the abstractions if you try hard, but at
least these pointers interacted with the GC properly) and garbage
collection prevented most dangling pointer problems.
A number of "modern" operating systems, like MacOS and Windows 9X, are
monolithic like this, but since they, and their applications, are written
in less safe languages we suffer from many memory management bugs that can
take down the entire system.
--
Barry Margolin, [EMAIL PROTECTED]
GTE Internetworking, Powered by BBN, Burlington, MA
*** DON'T SEND TECHNICAL QUESTIONS DIRECTLY TO ME, post them to newsgroups.
Please DON'T copy followups to me -- I'll assume it wasn't posted to the group.
------------------------------
From: "Michael Faurot" <[EMAIL PROTECTED]>
Crossposted-To: comp.os.linux.advocacy,comp.os.linux.hardware
Subject: Re: Digital Cameras
Date: 27 Feb 1999 23:39:00 GMT
In comp.os.linux.hardware The Infernal One <[EMAIL PROTECTED]> wrote:
: Does anyone either know or have good source information on
: which digital cameras support linux? TIA.
The Sony Mavica line of digital cameras. All images are stored on a
floppy. Thus any OS (including Linux) that can read a floppy with an
MS-DOS filesystem on it can use it.
--
==============================================================================
Michael | mfaurot | Many people are unenthusiastic about their work.
Faurot | phzzzt.atww.org |
------------------------------
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