[pmwiki-users] Error when using 'call system' in code block

[Luis]

I tested using system(etc) in normal text and it produces the same error. I
guess that Patrick is right, and it is all about an overzealous
mod_security. Thanks for the reply,


Luis

On 5/6/07, Patrick R. Michaud <pmichaud at pobox.com> wrote:
>
> On Sat, May 05, 2007 at 08:39:43PM +1200, Luis wrote:
> >    (:source lang=SAS:)[@
> >    data _null_;
> >        call system('c:\simproj\analysis.bat');
> >    run;
> >    @]
> >
> >    when saving the page I get the error message ""The server is
> temporarily
> >    unable to service your request due to maintenance downtime or
> capacity
> >    problems". I have tried several code examples, and have problems only
> with
> >    call system.
> >
> >    Does anybody:
> >    1. Know why is this happening?
> >    2. have a workaround?
>
> My guess is that your server has mod_security enabled, and
> mod_security is disallowing the "system(" part of your post
> as being a possible site attack.
>
> The easy way to verify this would be to simply create a post
> that doesn't contain any sourceblock directive -- i.e., edit
> a page and put just the text "system(" or "system('...')".
> If the server still blocks the post, it's likely a mod_security
> issue.
>
> See http://www.pmwiki.org/wiki/PmWiki/Troubleshooting#mod_security .
>
> If this is indeed the problem, then you'll want to either disable
> mod_security for your PmWiki site, or else figure out a way to
> write the content such that it doesn't trigger mod_security.
>
> In other cases I've recommended using [=...=] as a workaround to
> separate the "system" from the "(" ... i.e., writing "[=system=]("
> or "system[==](".  But since this text is already inside of a [@...@]
> section, that's not going to work.  Maybe someone else has an idea.
>
> Anyway, that's my guess as to the problem -- please let us know
> how it turns out!
>
> Pm
>



-- 
Dr Luis A. Apiolaza
School of Forestry
University of Canterbury
Private Bag 4800
Christchurch
New Zealand

'We can only see a short distance ahead, but we can
see plenty there that needs to be done'--Alan Turing
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