From jtao at cct.lsu.edu  Thu Oct 12 15:24:35 2006
From: jtao at cct.lsu.edu (jtao at cct.lsu.edu)
Date: Thu, 12 Oct 2006 15:24:35 -0500
Subject: [Users] math expression evaluator in Cactus
Message-ID: <20061012152435.ked39oirwg4soos0@webmail.cct.lsu.edu>

Hi,

Considering the following expression where a(x, t), b(x, t) and
c(x, t) are arbitrary functions of x and t.

         / 2         \           / 2         \
         |d          |           |d          |
a(x, t) |--- f(x, t)| + b(x, t) |--- f(x, t)| + c(x, t) = 0
         |  2        |           |  2        |
         \dt         /           \dx         /

A generic solver can be written to deal with this kind of equations.
The thorn gets the expressions of a(x, t), b(x, t) and c(x, t) from
a parameter file.

e.g.
...
coef_a = "(x^2)*exp(t)"
coef_b = "-ln(x/t)"
coef_a = "x*t"
...

A node tree will be built for each expression. coef_[a|b|c] can be
evaluated pointwisely in the code with the node tree.

A single expression can be used too if one defines the finite
difference operators in the code.

My thorn was later rewritten with libmatheval, a GNU project. I am not
sure if anyone has something similar or is interested in this. It will be
great to combine the efforts.

Ideas and suggestions ?

Regards,
Jian



From baiotti at aei.mpg.de  Fri Oct 13 04:28:00 2006
From: baiotti at aei.mpg.de (Luca Baiotti)
Date: Fri, 13 Oct 2006 11:28:00 +0200
Subject: [Users] PsiKadelia
Message-ID: <452F5C20.5000602@aei.mpg.de>

Hi,

I get the following complilation error about PsiKadelia. Is this a known 
issue?

Luca.



Preprocessing 
/data1/baiotti/Cactus/arrangements/CactusEinstein/PsiKadelia/src/PsiKadelia.F
Compiling 
/data1/baiotti/Cactus/arrangements/CactusEinstein/PsiKadelia/src/PsiKadelia.F
PGF90-S-0038-Symbol, spatial_order, has not been explicitly declared 
(/data1/baiotti/Cactus/configs/belladonna/build/PsiKadelia/PsiKadelia.f)
   0 inform,   0 warnings,   1 severes, 0 fatal for psikadelia
gmake[3]: *** [PsiKadelia.F.o] Error 2
gmake[2]: *** [make.checked] Error 2
gmake[1]: *** 
[/data1/baiotti/Cactus/configs/belladonna/lib/libthorn_PsiKadelia.a] Error 2
gmake: *** [belladonna] Error 2


From schnetter at cct.lsu.edu  Fri Oct 13 08:04:08 2006
From: schnetter at cct.lsu.edu (Erik Schnetter)
Date: Fri, 13 Oct 2006 08:04:08 -0500
Subject: [Users] PsiKadelia
In-Reply-To: <452F5C20.5000602@aei.mpg.de>
References: <452F5C20.5000602@aei.mpg.de>
Message-ID: <FB756381-CFC5-4891-95F4-F7FDD76D82FD@cct.lsu.edu>

On Oct 13, 2006, at 04:28:00, Luca Baiotti wrote:

> Hi,
>
> I get the following complilation error about PsiKadelia. Is this a  
> known
> issue?

Are you sure that you have an up to date version?  Maybe you updated  
some files and not others?

-erik

-- 
Erik Schnetter <schnetter at cct.lsu.edu>

My email is as private as my paper mail.  I therefore support encrypting
and signing email messages.  Get my PGP key from www.keyserver.net.



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From baiotti at aei.mpg.de  Fri Oct 13 08:15:38 2006
From: baiotti at aei.mpg.de (Luca Baiotti)
Date: Fri, 13 Oct 2006 15:15:38 +0200
Subject: [Users] PsiKadelia
In-Reply-To: <FB756381-CFC5-4891-95F4-F7FDD76D82FD@cct.lsu.edu>
References: <452F5C20.5000602@aei.mpg.de>
	<FB756381-CFC5-4891-95F4-F7FDD76D82FD@cct.lsu.edu>
Message-ID: <452F917A.8020804@aei.mpg.de>

Hi Erik,

Erik Schnetter wrote:
> On Oct 13, 2006, at 04:28:00, Luca Baiotti wrote:
> 
>> Hi,
>>
>> I get the following complilation error about PsiKadelia. Is this a  known
>> issue?
> 
> 
> Are you sure that you have an up to date version?  Maybe you updated  
> some files and not others?

I think I have all up to date, because I issued the command

LB-peyoteC PsiKadelia > cvs update -Ad
? doc/documentation.aux
? doc/documentation.dvi
? doc/documentation.log
? doc/documentation.out
cvs update: Updating .
cvs update: Updating doc
cvs update: Updating helpers
cvs update: Updating maple
cvs update: Updating math
cvs update: Updating par
cvs update: Updating src
cvs update: Updating src/include
cvs update: Updating test
cvs update: Updating test/teuktest
cvs update: Updating test/teuktest2
cvs update: Updating test/teuktest4


My Psikadelia.F file version is

----------------------------
revision 1.2
date: 2006/07/07 00:28:36;  author: schnetter;  state: Exp;  lines: +42 -19
Use ADMMacros for finite differencing in PsiKadelia.  This makes it
possible to be 4th order accurate, depending on
ADMMacros::spatial_order.
----------------------------


Is this the latest?


Luca.


From schnetter at cct.lsu.edu  Fri Oct 13 08:50:01 2006
From: schnetter at cct.lsu.edu (Erik Schnetter)
Date: Fri, 13 Oct 2006 08:50:01 -0500
Subject: [Users] PsiKadelia
In-Reply-To: <452F917A.8020804@aei.mpg.de>
References: <452F5C20.5000602@aei.mpg.de>
	<FB756381-CFC5-4891-95F4-F7FDD76D82FD@cct.lsu.edu>
	<452F917A.8020804@aei.mpg.de>
Message-ID: <F3AD822D-9B1D-42BE-A05A-E77DE6A69E4D@cct.lsu.edu>

On Oct 13, 2006, at 08:15:38, Luca Baiotti wrote:

> Hi Erik,
>
> Erik Schnetter wrote:
>> On Oct 13, 2006, at 04:28:00, Luca Baiotti wrote:
>>
>>> Hi,
>>>
>>> I get the following complilation error about PsiKadelia. Is this  
>>> a  known
>>> issue?
>>
>>
>> Are you sure that you have an up to date version?  Maybe you updated
>> some files and not others?
>
> I think I have all up to date, because I issued the command
>
> LB-peyoteC PsiKadelia > cvs update -Ad
> ? doc/documentation.aux
> ? doc/documentation.dvi
> ? doc/documentation.log
> ? doc/documentation.out
> cvs update: Updating .
> cvs update: Updating doc
> cvs update: Updating helpers
> cvs update: Updating maple
> cvs update: Updating math
> cvs update: Updating par
> cvs update: Updating src
> cvs update: Updating src/include
> cvs update: Updating test
> cvs update: Updating test/teuktest
> cvs update: Updating test/teuktest2
> cvs update: Updating test/teuktest4
>
>
> My Psikadelia.F file version is
>
> ----------------------------
> revision 1.2
> date: 2006/07/07 00:28:36;  author: schnetter;  state: Exp;  lines:  
> +42 -19
> Use ADMMacros for finite differencing in PsiKadelia.  This makes it
> possible to be 4th order accurate, depending on
> ADMMacros::spatial_order.
> ----------------------------
>
>
> Is this the latest?

Do you also have revision 1.8 of param.ccl?

-erik

-- 
Erik Schnetter <schnetter at cct.lsu.edu>

My email is as private as my paper mail.  I therefore support encrypting
and signing email messages.  Get my PGP key from www.keyserver.net.



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From baiotti at aei.mpg.de  Fri Oct 13 08:56:47 2006
From: baiotti at aei.mpg.de (Luca Baiotti)
Date: Fri, 13 Oct 2006 15:56:47 +0200
Subject: [Users] PsiKadelia
In-Reply-To: <F3AD822D-9B1D-42BE-A05A-E77DE6A69E4D@cct.lsu.edu>
References: <452F5C20.5000602@aei.mpg.de>	<FB756381-CFC5-4891-95F4-F7FDD76D82FD@cct.lsu.edu>	<452F917A.8020804@aei.mpg.de>
	<F3AD822D-9B1D-42BE-A05A-E77DE6A69E4D@cct.lsu.edu>
Message-ID: <452F9B1F.1080904@aei.mpg.de>

Erik Schnetter wrote:
> On Oct 13, 2006, at 08:15:38, Luca Baiotti wrote:
> 
>> Hi Erik,
>>
>> Erik Schnetter wrote:
>>
>>> On Oct 13, 2006, at 04:28:00, Luca Baiotti wrote:
>>>
>>>> Hi,
>>>>
>>>> I get the following complilation error about PsiKadelia. Is this  a  
>>>> known
>>>> issue?
>>>
>>>
>>>
>>> Are you sure that you have an up to date version?  Maybe you updated
>>> some files and not others?
>>
>>
>> I think I have all up to date, because I issued the command
>>
>> LB-peyoteC PsiKadelia > cvs update -Ad
>> ? doc/documentation.aux
>> ? doc/documentation.dvi
>> ? doc/documentation.log
>> ? doc/documentation.out
>> cvs update: Updating .
>> cvs update: Updating doc
>> cvs update: Updating helpers
>> cvs update: Updating maple
>> cvs update: Updating math
>> cvs update: Updating par
>> cvs update: Updating src
>> cvs update: Updating src/include
>> cvs update: Updating test
>> cvs update: Updating test/teuktest
>> cvs update: Updating test/teuktest2
>> cvs update: Updating test/teuktest4
>>
>>
>> My Psikadelia.F file version is
>>
>> ----------------------------
>> revision 1.2
>> date: 2006/07/07 00:28:36;  author: schnetter;  state: Exp;  lines:  
>> +42 -19
>> Use ADMMacros for finite differencing in PsiKadelia.  This makes it
>> possible to be 4th order accurate, depending on
>> ADMMacros::spatial_order.
>> ----------------------------
>>
>>
>> Is this the latest?
> 
> 
> Do you also have revision 1.8 of param.ccl?

Yes:

LB-peyoteC PsiKadelia > cvs status param.ccl
===================================================================
File: param.ccl         Status: Up-to-date

    Working revision:    1.8
    Repository revision: 1.8 
/cactusdevcvs/CactusEinstein/PsiKadelia/param.ccl,v
    Sticky Tag:          (none)
    Sticky Date:         (none)
    Sticky Options:      (none)


From schnetter at cct.lsu.edu  Fri Oct 13 09:05:32 2006
From: schnetter at cct.lsu.edu (Erik Schnetter)
Date: Fri, 13 Oct 2006 09:05:32 -0500
Subject: [Users] PsiKadelia
In-Reply-To: <452F9B1F.1080904@aei.mpg.de>
References: <452F5C20.5000602@aei.mpg.de>	<FB756381-CFC5-4891-95F4-F7FDD76D82FD@cct.lsu.edu>	<452F917A.8020804@aei.mpg.de>
	<F3AD822D-9B1D-42BE-A05A-E77DE6A69E4D@cct.lsu.edu>
	<452F9B1F.1080904@aei.mpg.de>
Message-ID: <5C67E4DC-0EB1-443C-B8F9-628BFEED0D0B@cct.lsu.edu>

Luca,

I'm confused: Your param.ccl declares the parameter spatial_order, so  
it should be known.  Maybe your build has become confused?  Try a  
make *-realclean to see if that helps.  If not, I can have a look at  
your source tree.

-erik

-- 
Erik Schnetter <schnetter at cct.lsu.edu>

My email is as private as my paper mail.  I therefore support encrypting
and signing email messages.  Get my PGP key from www.keyserver.net.



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From baiotti at aei.mpg.de  Fri Oct 13 10:35:36 2006
From: baiotti at aei.mpg.de (Luca Baiotti)
Date: Fri, 13 Oct 2006 17:35:36 +0200
Subject: [Users] PsiKadelia
In-Reply-To: <5C67E4DC-0EB1-443C-B8F9-628BFEED0D0B@cct.lsu.edu>
References: <452F5C20.5000602@aei.mpg.de>	<FB756381-CFC5-4891-95F4-F7FDD76D82FD@cct.lsu.edu>	<452F917A.8020804@aei.mpg.de>	<F3AD822D-9B1D-42BE-A05A-E77DE6A69E4D@cct.lsu.edu>	<452F9B1F.1080904@aei.mpg.de>
	<5C67E4DC-0EB1-443C-B8F9-628BFEED0D0B@cct.lsu.edu>
Message-ID: <452FB248.5040801@aei.mpg.de>

Eirk,

Erik Schnetter wrote:
> Luca,
> 
> I'm confused: Your param.ccl declares the parameter spatial_order, so  
> it should be known.  Maybe your build has become confused?  Try a  make 
> *-realclean to see if that helps.  If not, I can have a look at  your 
> source tree.

I was building a new configuration from scratch.

Anyway (mysteries of cvs + cactus), after deleting my Psikadelia 
checkout and downloading a new one and building the configuration from 
scratch (all this also after more suggestions by Jonathan T.), it now 
compiles.


Thanks,

Luca.


From dprideout at gmail.com  Fri Oct 13 12:12:20 2006
From: dprideout at gmail.com (David Rideout)
Date: Fri, 13 Oct 2006 18:12:20 +0100
Subject: [Users] make ThornGuide
Message-ID: <1ce81abb0610131012q232a2fa1n946c68044f555e3f@mail.gmail.com>

When I try to build the ThornGuide I get something without any titles
for the thorns on the table of contents, nor in the thorns themselves.
 There are no "part" titles.  Neither is there anything in the *.ccl
sections.  (Well actually there is something -- just a bunch of empty
placeholders for what is found in the files.  e.g. it seems to read
the number of parameters and their type, but not their names or
descriptions.)

I tried this with a fresh checkout from cactusdevcvs, with just
CactusBase in my arrangements directory.  Am I missing something??  I
tried this on Linux and a Mac, with the same results for each.

Thanks,
David

From yye00 at cct.lsu.edu  Tue Oct 17 14:07:53 2006
From: yye00 at cct.lsu.edu (Yaakoub Y El Khamra)
Date: Tue, 17 Oct 2006 14:07:53 -0500
Subject: [Users] CactusCode.org is back
Message-ID: <45352A09.60302@cct.lsu.edu>


Greetings
We are happy to inform you that the cactus website is now up. Please let 
us know if you encounter problems or if anything is still broken.

Regards
Yaakoub

From yye00 at cct.lsu.edu  Mon Oct 16 12:33:38 2006
From: yye00 at cct.lsu.edu (Yaakoub Y El Khamra)
Date: Mon, 16 Oct 2006 12:33:38 -0500
Subject: [Users] Cactus website is down
Message-ID: <4533C272.7030107@cct.lsu.edu>


Greetings
The cactus website is down, I am working on it right now. Sorry for the
inconvenience.

Regards
Yaakoub


From yye00 at cct.lsu.edu  Tue Oct 17 14:48:50 2006
From: yye00 at cct.lsu.edu (Yaakoub Y El Khamra)
Date: Tue, 17 Oct 2006 14:48:50 -0500
Subject: [Users] Cactus website is down
In-Reply-To: <4533C272.7030107@cct.lsu.edu>
References: <4533C272.7030107@cct.lsu.edu>
Message-ID: <453533A2.8080606@cct.lsu.edu>


Please ignore this message, it has been sitting in the queue since last 
friday.

Yaakoub Y El Khamra wrote:
> Greetings
> The cactus website is down, I am working on it right now. Sorry for the
> inconvenience.
>
> Regards
> Yaakoub
>
> _______________________________________________
> Users mailing list
> Users at cactuscode.org
> http://www.cactuscode.org/mailman/listinfo/users
>
>   


From yye00 at cct.lsu.edu  Fri Oct 13 21:51:31 2006
From: yye00 at cct.lsu.edu (Yaakoub El Khamra)
Date: Fri, 13 Oct 2006 21:51:31 -0500
Subject: [Users] Cactus website is down
Message-ID: <453050B3.5020801@cct.lsu.edu>


Greetings
The cactus website is down, I am working on it right now. Sorry for the 
inconvenience.

Regards
Yaakoub

From liuhaibo256 at 163.com  Sat Oct 21 00:08:27 2006
From: liuhaibo256 at 163.com (=?gb2312?B?wfW6o7Kp?=)
Date: Sat, 21 Oct 2006 13:08:27 +0800 (CST)
Subject: [Users] help:when I use the perl script to check out cactus code it
 always telled me time out!
Message-ID: <4539AB4B.000001.22298@bj163app47.163.com>



I am from China.I planed to use cactus code in a GIS project.But I can not check out cactus code with the script.Also ,I can not open cvs_anon at cvs.cactuscode.ort:/cactus,with info "404,can not found the web on this server.I don't known why.
yours.
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From yye00 at cct.lsu.edu  Sat Oct 21 00:55:11 2006
From: yye00 at cct.lsu.edu (Yaakoub El Khamra)
Date: Sat, 21 Oct 2006 00:55:11 -0500
Subject: [Users] help:when I use the perl script to check out cactus
 code it always telled me time out!
In-Reply-To: <4539AB4B.000001.22298@bj163app47.163.com>
References: <4539AB4B.000001.22298@bj163app47.163.com>
Message-ID: <4539B63F.9070506@cct.lsu.edu>


Greetings
out of curiosity, which script are you using and are you using cvs
(concurrent versioning system) to access cvs.cactuscode.org? I could be
wrong but 404 errors usually occur when a web browser cannot find a
webpage or a file.

Regards
Yaakoub

?????? wrote:
>
>
> I am from China.I planed to use cactus code in a GIS project.But I can
> not check out cactus code with the script.Also ,I can not open
> cvs_anon at cvs.cactuscode.ort:/cactus,with info "404,can not found the
> web on this server.I don't known why.
> yours.
>
>
>
>
>
>
> 3G ?? ?? ?? ?? ?????? ?? ?? ?? ???? ?? ?? ?? ??
> ?? ?? ?? ?? ?? 3G ?? ?? ?? ?? ?? ?? ??280 ?? ?? ?? ?? ?? ?? ?? ?? ??
> ?? ?? ?? ?? <http://www.126.com/>
> ------------------------------------------------------------------------
>
> _______________________________________________
> Users mailing list
> Users at cactuscode.org
> http://www.cactuscode.org/mailman/listinfo/users
>   


From dprideout at gmail.com  Sat Oct 21 05:48:17 2006
From: dprideout at gmail.com (David Rideout)
Date: Sat, 21 Oct 2006 11:48:17 +0100
Subject: [Users] help:when I use the perl script to check out cactus
	code it always telled me time out!
In-Reply-To: <4539AB4B.000001.22298@bj163app47.163.com>
References: <4539AB4B.000001.22298@bj163app47.163.com>
Message-ID: <1ce81abb0610210348u4ff1f604qf1a642af22a3e4f0@mail.gmail.com>

Try downloading Cactus from
http://www.cactuscode.org/cactus_cgi-bin/download.pl

For "Action" select "Generate Tar File".

Cheers,
David

On 10/21/06, ?????? <liuhaibo256 at 163.com> wrote:
>
>
> I am from China.I planed to use cactus code in a GIS project.But I can not
> check out cactus code with the script.Also ,I can not open
> cvs_anon at cvs.cactuscode.ort:/cactus,with info "404,can not found the web on
> this server.I don't known why.
> yours.
>
>
>
>
>
>
>  3G ?? ?? ?? ?? ?????? ?? ?? ?? ?? ?? ?? ?? ?? ??
>  ?? ?? ?? ?? ?? 3G ?? ?? ?? ?? ?? ?? ??280 ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ??
> _______________________________________________
> Users mailing list
> Users at cactuscode.org
> http://www.cactuscode.org/mailman/listinfo/users
>
>
>


From schnetter at cct.lsu.edu  Thu Oct 26 09:42:30 2006
From: schnetter at cct.lsu.edu (Erik Schnetter)
Date: Thu, 26 Oct 2006 16:42:30 +0200
Subject: [Users] [CactusMaint] compile & link error at IntelMac with
	IntelFortran
In-Reply-To: <0AFE1E5A-D58F-4D09-979C-35FDB5820322@is.oit.ac.jp>
References: <7C9EB34B-D742-4528-B28F-8F6199CEAF6F@is.oit.ac.jp>
	<5FFD86BD-7842-4038-87A1-3BF26CA78871@cct.lsu.edu>
	<50F671F7-EE65-49B7-AB91-DBEC766C1B5B@is.oit.ac.jp>
	<BECD4B74-75DB-467D-861A-C37CED3BC5E2@cct.lsu.edu>
	<0AFE1E5A-D58F-4D09-979C-35FDB5820322@is.oit.ac.jp>
Message-ID: <56674272-7D28-4DE3-94A0-AE080742A232@cct.lsu.edu>

Hisaaki,

your configuration output shows that you are trying to combine gcc, g+ 
+, and ifort.  It is usually much easier to choose C++ and Fortran  
compilers from a single vendor, i.e., Intel in your case.  Try the  
options

CC=icc
CXX=icpc
F90=ifort
F77=ifort

to select everything explicitly.

You build output does not contain any error messages.  Either your  
build went fine, or you forgot to capture the error messages.  Make  
sure to redirect both stdout and stderr.

-erik

-- 
Erik Schnetter <schnetter at cct.lsu.edu>

My email is as private as my paper mail.  I therefore support encrypting
and signing email messages.  Get my PGP key from www.keyserver.net.



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From schnetter at cct.lsu.edu  Mon Oct 30 07:56:23 2006
From: schnetter at cct.lsu.edu (Erik Schnetter)
Date: Mon, 30 Oct 2006 14:56:23 +0100
Subject: [Users] [Carpet] checkpoint at run-time request
In-Reply-To: <4545F7C1.9050305@aei.mpg.de>
References: <200610181615.59366.szilagyi@aei.mpg.de>
	<6D11DCED-8F90-42A5-97AB-B275305D1721@cct.lsu.edu>
	<4545F7C1.9050305@aei.mpg.de>
Message-ID: <618ED602-A54E-4C59-9FB6-B4C7A78270B1@cct.lsu.edu>

On Oct 30, 2006, at 14:01:53, Frank Loeffler wrote:

> Hi,
>
>> On Oct 18, 2006, at 09:15:59, Bela Szilagyi wrote:
>>> I know there is the web-interface
>>> option of
>>> steering parameters, but I never trusted that enough to try...
>
>>> More generically, it would be quite useful to have a simple,   
>>> usable, and
>>> trustworthy way of modifying parameters of a run, while it's
>>> running.
>
> Erik Schnetter wrote:
>> Cactus has a web server thorn.
>
> I think this is what Bela meant by 'web interface' and what is somehow
> connected to 'insecure' in my mind - without reasons to directly  
> put my
> finger on at the moment. Does someone already did a security audit  
> on this?

Steve White looked at the code extensively a while ago; he corrected  
all the string manipulations.  Your finding is probably a leftover  
oversight, a missing check for an error condition.

The routines that display images, grid functions, or parameters are  
insecure if the web server runs multi-threaded (which it should),  
since then the web server follows pointers which may vanish at any  
time.  The parameter steering, however, seems secure, since the  
steering requests are batched up until a specific point in time in  
the evolution.

-erik

-- 
Erik Schnetter <schnetter at cct.lsu.edu>

My email is as private as my paper mail.  I therefore support encrypting
and signing email messages.  Get my PGP key from www.keyserver.net.



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From steve.white at aei.mpg.de  Mon Oct 30 08:43:41 2006
From: steve.white at aei.mpg.de (Steve White)
Date: Mon, 30 Oct 2006 15:43:41 +0100
Subject: [Users] [Carpet] checkpoint at run-time request
In-Reply-To: <618ED602-A54E-4C59-9FB6-B4C7A78270B1@cct.lsu.edu>
References: <200610181615.59366.szilagyi@aei.mpg.de>
	<6D11DCED-8F90-42A5-97AB-B275305D1721@cct.lsu.edu>
	<4545F7C1.9050305@aei.mpg.de>
	<618ED602-A54E-4C59-9FB6-B4C7A78270B1@cct.lsu.edu>
Message-ID: <20061030144340.GA6690@xeon01.aei.mpg.de>

Erik,

I didn't finish my overhaul of the thorn.  (My understanding is, a student
will be assigned to it any moment now.)

The corrections I made were mostly in the HTML generation code.
I don't think I did much work on the file in question.

As to the code Frank points out in Authorisaton.c, yes that is a bug.

As to a security audit or something: never mind that.  The whole thing
is little more than a proof-of-concept; it was never intended to be secure
in any sense.

A good solution would be to run this interface through some secure
channel, which would check user's credentials and encrypt everything. 
This shouldn't be hard; maybe the D-Grid guys are working on
something like that. (?)

Cheers!


On 30.10.06, Erik Schnetter wrote:
> On Oct 30, 2006, at 14:01:53, Frank Loeffler wrote:
> 
> >Hi,
> >
> >>On Oct 18, 2006, at 09:15:59, Bela Szilagyi wrote:
> >>>I know there is the web-interface
> >>>option of
> >>>steering parameters, but I never trusted that enough to try...
> >
> >>>More generically, it would be quite useful to have a simple,   
> >>>usable, and
> >>>trustworthy way of modifying parameters of a run, while it's
> >>>running.
> >
> >Erik Schnetter wrote:
> >>Cactus has a web server thorn.
> >
> >I think this is what Bela meant by 'web interface' and what is somehow
> >connected to 'insecure' in my mind - without reasons to directly  
> >put my
> >finger on at the moment. Does someone already did a security audit  
> >on this?
> 
> Steve White looked at the code extensively a while ago; he corrected  
> all the string manipulations.  Your finding is probably a leftover  
> oversight, a missing check for an error condition.
> 
> The routines that display images, grid functions, or parameters are  
> insecure if the web server runs multi-threaded (which it should),  
> since then the web server follows pointers which may vanish at any  
> time.  The parameter steering, however, seems secure, since the  
> steering requests are batched up until a specific point in time in  
> the evolution.
> 
> -erik
> 
> -- 
> Erik Schnetter <schnetter at cct.lsu.edu>
> 
> My email is as private as my paper mail.  I therefore support encrypting
> and signing email messages.  Get my PGP key from www.keyserver.net.
> 
> 
> 



> _______________________________________________
> Users mailing list
> Users at cactuscode.org
> http://www.cactuscode.org/mailman/listinfo/users


-- 
Steve White : Programmer
Max-Planck-Institut f?r Gravitationsphysik      Albert-Einstein-Institut
Am M?hlenberg 1, D-14476 Golm, Germany                  +49-331-567-7625


From tradke at aei.mpg.de  Mon Oct 30 12:39:06 2006
From: tradke at aei.mpg.de (Thomas Radke)
Date: Mon, 30 Oct 2006 19:39:06 +0100
Subject: [Users] [Carpet] checkpoint at run-time request
In-Reply-To: <20061030144340.GA6690@xeon01.aei.mpg.de>
References: <200610181615.59366.szilagyi@aei.mpg.de>	<6D11DCED-8F90-42A5-97AB-B275305D1721@cct.lsu.edu>	<4545F7C1.9050305@aei.mpg.de>	<618ED602-A54E-4C59-9FB6-B4C7A78270B1@cct.lsu.edu>
	<20061030144340.GA6690@xeon01.aei.mpg.de>
Message-ID: <454646CA.3030204@aei.mpg.de>

Steve White wrote:
> Erik,
> 
> I didn't finish my overhaul of the thorn.  (My understanding is, a student
> will be assigned to it any moment now.)
> 
> The corrections I made were mostly in the HTML generation code.
> I don't think I did much work on the file in question.
> 
> As to the code Frank points out in Authorisaton.c, yes that is a bug.
> 
> As to a security audit or something: never mind that.  The whole thing
> is little more than a proof-of-concept; it was never intended to be secure
> in any sense.
> 
> A good solution would be to run this interface through some secure
> channel, which would check user's credentials and encrypt everything. 
> This shouldn't be hard; maybe the D-Grid guys are working on
> something like that. (?)

Indeed, monitoring/steering methods for Cactus are on our list (for next 
year). For sure they will also provide secure access and user 
authentication/authorisation.

However, what Frank and Erik probably meant by 'secure access' is more 
likely safety in terms of code stability, I guess. You fixed quite some 
bugs in the HTML generation code by introducing your SString routines. 
Apparently these routines aren't used everywhere so there are 
potentially still bugs left in the code - one of them was pointed out by 
Frank.
It would be good if someone could just go through all the code in 
HTTPD/HTTPDExtra and make use of SString routines consistently. You said 
you have a student for this job ?

-- 
Cheers, Thomas.