Re: [Haskell-cafe] Setting environment variables on Windows

On Wednesday 14 October 2009 04:50:56 pm Sönke Hahn wrote:

On Friday 09 October 2009 07:19:30 pm Peter Verswyvelen wrote:

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Mmm, that seems like a shortcoming.

Well, you could just wrap the C functions yourself, like this (two possibilities, no error checking yet, quick hack): http://hpaste.org/fastcgi/hpaste.fcgi/view?id=10565#a10565

Note that using SetEnvironmentVariable does not seem to be compatible with getEnv, but calling _putenv does work.

Both solutions seem to work on my system. Using c_putenv doesn't require linking additional libraries in my case, so i'm going with that. You've been very helpful, thank you very much.

...

So I guess someone should add this setEnv wrapper to the System.Environment module? Ticket?

Once i figure out, how to implement functions differently for linux and windows, i'll write a ticket with an example module based on your suggestion.

Here's the ticket: http://hackage.haskell.org/trac/ghc/ticket/3587

Again, many thanks,

Sönke

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On Fri, Oct 9, 2009 at 5:37 PM, Sönke Hahn wrote:

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Hi!

I need to set an environment variable from Haskell and i would like to do

that

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cross-platform. There is System.Posix.Env.setEnv, which does exactly, what

i

...

want on Linux. There is the module System.Environment, which seems to be cross-platform, but it does not contain functions to manipulate the environment (, just to inspect it). At first glance, I didn't find

anything

...

relevant in the sub-modules of System.Win32.

Is this just not implemented? How could i implement it myself?

Grateful for any comment,

Sönke _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

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