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Today's Topics:
1. system and FilePath with space (PICCA Frederic-Emmanuel)
2. Re: system and FilePath with space (Frerich Raabe)
3. Re: system and FilePath with space (PICCA Frederic-Emmanuel)
4. Re: system and FilePath with space (Michael Snoyman)
5. Re: system and FilePath with space (PICCA Frederic-Emmanuel)
----------------------------------------------------------------------
Message: 1
Date: Thu, 26 Jan 2017 09:50:47 +0000
From: PICCA Frederic-Emmanuel
<frederic-emmanuel.pi...@synchrotron-soleil.fr>
To: "The Haskell-Beginners Mailing List - Discussion of primarily
beginner-level topics related to Haskell" <beginners@haskell.org>
Subject: [Haskell-beginners] system and FilePath with space
Message-ID:
<a2a20ec3b8560d408356cac2fc148e53bb332...@sun-dag3.synchrotron-soleil.fr>
Content-Type: text/plain; charset="us-ascii"
Hello
I try to execute a command using system.
my code is like this
system (unwords ["python", p])
where
p :: FilePath
p = "/my super/script.py"
has you can see this path contain a space.
When I try to run it I get an error
python: can't open file '/my':
So the system command is wrong.
I understand that I need to escape the space in the command, like this
p = "/my\ super/script.py"
now is there a function in haskell for this.
a sort of sanitizer for FilePath when used by system.
Thanks
Frederic
------------------------------
Message: 2
Date: Thu, 26 Jan 2017 11:03:42 +0100
From: Frerich Raabe <ra...@froglogic.com>
To: The Haskell-Beginners Mailing List - Discussion of primarily
beginner-level topics related to Haskell <beginners@haskell.org>
Subject: Re: [Haskell-beginners] system and FilePath with space
Message-ID: <1c681ea7e9acb4a0b4038a946ec50...@froglogic.com>
Content-Type: text/plain; charset=US-ASCII; format=flowed
On 2017-01-26 10:50, PICCA Frederic-Emmanuel wrote:
> Hello
>
> I try to execute a command using system.
>
> my code is like this
>
>
> system (unwords ["python", p])
An easier way to execute programs is to use the functions defined in
System.Process, e.g.:
import System.Process
main :: IO ()
main = callProcess "/usr/bin/python" ["/my super/script.py"]
Note that 'callProcess' takes a list of strings, each element being one
argument. The elements may contain spaces.
--
Frerich Raabe - ra...@froglogic.com
www.froglogic.com - Multi-Platform GUI Testing
------------------------------
Message: 3
Date: Thu, 26 Jan 2017 10:19:37 +0000
From: PICCA Frederic-Emmanuel
<frederic-emmanuel.pi...@synchrotron-soleil.fr>
To: "The Haskell-Beginners Mailing List - Discussion of primarily
beginner-level topics related to Haskell" <beginners@haskell.org>
Subject: Re: [Haskell-beginners] system and FilePath with space
Message-ID:
<a2a20ec3b8560d408356cac2fc148e53bb332...@sun-dag3.synchrotron-soleil.fr>
Content-Type: text/plain; charset="us-ascii"
thanks but I do not have a recent enough ghc in order to use this method
(debian jessie)
maybe I can use proc in order to prepare my command line ?
------------------------------
Message: 4
Date: Thu, 26 Jan 2017 12:21:56 +0200
From: Michael Snoyman <mich...@snoyman.com>
To: The Haskell-Beginners Mailing List - Discussion of primarily
beginner-level topics related to Haskell <beginners@haskell.org>
Subject: Re: [Haskell-beginners] system and FilePath with space
Message-ID:
<caka2jgk8sq5jdgq+ggnkgpdyrflr17sn1pz3nqczhjx+to+...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
You can use the rawSystem function on older versions of the process package.
On Thu, Jan 26, 2017 at 12:19 PM, PICCA Frederic-Emmanuel <
frederic-emmanuel.pi...@synchrotron-soleil.fr> wrote:
> thanks but I do not have a recent enough ghc in order to use this method
> (debian jessie)
>
>
> maybe I can use proc in order to prepare my command line ?
> _______________________________________________
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Message: 5
Date: Thu, 26 Jan 2017 10:33:27 +0000
From: PICCA Frederic-Emmanuel
<frederic-emmanuel.pi...@synchrotron-soleil.fr>
To: "The Haskell-Beginners Mailing List - Discussion of primarily
beginner-level topics related to Haskell" <beginners@haskell.org>
Subject: Re: [Haskell-beginners] system and FilePath with space
Message-ID:
<a2a20ec3b8560d408356cac2fc148e53bb332...@sun-dag3.synchrotron-soleil.fr>
Content-Type: text/plain; charset="us-ascii"
>You can use the rawSystem function on older versions of the process package.
thanks , it is exactly what I wanted.
Cheers
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