Running C processes, where do I put the C file?

[Adam Akhtar-2]

Hi there

I make a call jsut like this:

value = `./simulated_annealing`

Which is a C Object file, but Rails tells me it cannot find that file. I
put it in the same dir that the rest of the models files (since it's
called by one of those models), but I guess it should be in any other
place.

What do I have to do?
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[Frederick Cheung-2]

On Nov 7, 12:24 pm, Victor Martin <rails-mailing-l...@...>
wrote:

> Hi there
>
> I make a call jsut like this:
>
> value = `./simulated_annealing`
>
> Which is a C Object file, but Rails tells me it cannot find that file. I
> put it in the same dir that the rest of the models files (since it's
> called by one of those models), but I guess it should be in any other
> place.
>
> What do I have to do?

What the current directory is might depend on how you start the app,
but in general it is the top level of your app. Either chdir to the
folder containing your binary, use an absolute path or specify the
path relative to the current directory.


Fred
> --
> Posted viahttp://www.ruby-forum.com/.
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[Adam Akhtar-2]

Frederick Cheung wrote:

> What the current directory is might depend on how you start the app,
> but in general it is the top level of your app. Either chdir to the
> folder containing your binary, use an absolute path or specify the
> path relative to the current directory.
>
>
> Fred

Oh, I feel stupid. I just ran a "ls" command and it's just as you say,
it's in the top level.

Thanks!
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[Adam Akhtar-2]

Victor Martin wrote:

> Frederick Cheung wrote:
>
>> What the current directory is might depend on how you start the app,
>> but in general it is the top level of your app. Either chdir to the
>> folder containing your binary, use an absolute path or specify the
>> path relative to the current directory.
>>
>>
>> Fred
>
> Oh, I feel stupid. I just ran a "ls" command and it's just as you say,
> it's in the top level.

File.dirname(__FILE__) is great for constructing absolute paths on the
fly.

>
> Thanks!
Best,
--
Marnen Laibow-Koser
http://www.marnen.org
marnen@...
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[Adam Akhtar-2]

Victor Martin wrote:

> Hi there
>
> I make a call jsut like this:
>
> value = `./simulated_annealing`
>
> Which is a C Object file, but Rails tells me it cannot find that file. I
> put it in the same dir that the rest of the models files (since it's
> called by one of those models), but I guess it should be in any other
> place.
>
> What do I have to do?

Hi Victor,

 Best option is to use absolute path for running the program. For ex.,
you can create a directory "bin" under your rails application top level
directory. Place your program under "bin" directory. Then you can
execute the program something like -

 cmd = "#{RAILS_ROOT}/bin/cbin arg1 arg2"
 value = `#{cmd}`

Thanks
-- Prasad
http://roorky.com
Interactive Programming Books
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