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Re: pre-2.1.15 -> 2.1.18 upgrade warning


From: christian pearce
Subject: Re: pre-2.1.15 -> 2.1.18 upgrade warning
Date: Tue, 31 Jan 2006 13:55:30 -0500

Brendan,

Are you stuck with broken configs at this point?  I am faced with the
same quandry.  I am at 2.1.15 but my code is not compatible with
2.1.18.  And last I checked when I tried to fixed the code to work
with 2.1.18 it won't work under 2.1.15.  What are you doing to get
around this?

On 1/31/06, Brendan Strejcek <address@hidden> wrote:
> I'm still having issues with the quotation rules for ReturnsZero, though
> I did find a workaround. I am trying to embed a command like:
>
>     /bin/sh -c "/usr/bin/python -c \"import asdf\""
>
> But I don't seem to be able to get the backslashes down to the shell. I
> would expect this to work, escaping the backslashes, as it does in C:
>
>     ReturnsZero("/bin/sh -c \"${python} -c \\\"import asdf\\\"\"")
>
> But it does not. With an echo on the front, it seems clear that the parser
> is not being greedy enough, as the output I get is:
>
>     /usr/local/bin/python -c \
>
> So it is throwing away everything after the underlined section:
>
>     ReturnsZero("/bin/sh -c \"${python} -c \\\"import asdf\\\"\"")
>                             ^^^^^^^^^^^^^^^^^^^
>
> I did find that the following works:
>
>     ReturnsZero("/bin/sh -c \"${python} -c ${quote}import asdf${quote}\"")
>
> So maybe there is a bug with escaping backslashes.
>
> I guess I will add a paragraph to my best practices document saying that
> one should avoid complicated escaping. It is hard to read, anyways.
>
> Best,
> Brendan
>
> --
> Senior System Administrator
> The University of Chicago
> Department of Computer Science
>
> http://www.cs.uchicago.edu/people/brendan
> http://praksys.blogspot.com/
>
>
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> Help-cfengine mailing list
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>


--
Christian Pearce




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