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From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2006-11-06 07:22:23


Wow; I could have sworn that @foo@ was evaluated during
Values::EvaluateString.

In light of all that, I looked more closely at your patch. I had
assumed that you were modifying Values.pm and didn't even notice that
you were modifying DoCommand.pm (doh!). So in light of that, I have
no objections to the patch, but I still don't think it's necessary. :-)

On Nov 3, 2006, at 4:30 PM, Ethan Mallove wrote:

> On Fri, Nov/03/2006 03:31:40PM, Jeff Squyres wrote:
>> No, @foo@ is evaluated when shell_command is evaluated.
>
> There's this block in Test/Run.pm, but I don't see the analogous
> block anywhere else (e.g., Build or Install).
>
> {{{
> while ($exec =~ m/@(.+?)@/) {
> my $val = $ini->val($mpi_details_section, $1);
> if (!$val) {
> Warning("Used undefined key @$1@ in exec value;
> skipping");
> return;
> }
> $exec =~ s/@(.+?)@/$val/;
> }
> }}}
>
>
>> So it would have it's " chopped before it was folded into
>> shell_command, resulting in a the following:
>>
>
>> ./configure CFLAGS=-g -O
>>
>> which would be wrong.
>>
>> I admit to not having looked closely at your patch; would
>> it handle this scenario properly?
>>
>
> No, the always erroneous command-wrapping quotes get chopped
> just before they're passed to exec() in DoCommand. It would
> not chop the trailing quote, because there's no leading
> quote.
>
> -Ethan
>
>
>>
>> On Nov 3, 2006, at 1:21 PM, Jeff Squyres wrote:
>>
>>> On Nov 3, 2006, at 12:08 PM, Ethan Mallove wrote:
>>>
>>>> Point taken about being literal. My thinking is that most
>>>> will be only guessing about the quoting mechanism of
>>>> funclets (as I was for a bit), and there would never be a
>>>> real case for sending '"cmd"' to exec().
>>>
>>> How about a doc fix then?
>>>
>>> I'm not so worried about a '"cmd"' to exec(), but more about other
>>> fields. Remember that shell commands are a very small portion of
>>> the fields used in MTT - there's others that are explicitly used as
>>> portions of commands. For example you could do something like this:
>>>
>>> shell_command = ./configure @foo@
>>> foo = "CFLAGS=-g -O"
>>>
>>> which then wouldn't work.
>>>
>>> --
>>> Jeff Squyres
>>> Server Virtualization Business Unit
>>> Cisco Systems
>>>
>>> _______________________________________________
>>> mtt-users mailing list
>>> mtt-users_at_[hidden]
>>> http://www.open-mpi.org/mailman/listinfo.cgi/mtt-users
>>
>>
>> --
>> Jeff Squyres
>> Server Virtualization Business Unit
>> Cisco Systems
>>
>> _______________________________________________
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>> mtt-users_at_[hidden]
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-- 
Jeff Squyres
Server Virtualization Business Unit
Cisco Systems