On Mon, Jan 10, 2011 at 01:43:16PM +0100, Bert Freudenberg wrote:
> On 10.01.2011, at 13:20, arunabh2k wrote:
> 
> > Hi All,
> > 
> > I am trying to find out a way to call external executable and grab the input
> > from the same when a button(which I would be creating) is clicked.
> > As I am new to squeak programming it would be great help if anyone can guide
> > me how to achieve this.
> 
> As a beginner you should ask this kind of question in the beginners forum:
> 
> 	http://forum.world.st/Squeak-Beginners-f107673.html
> 
> Here on squeak-dev the answer you would typically get is "use OSProcess" and you're kind-of expected to work out most of the rest yourself ;)
>

Well here are a couple more clues ;)

If you are using Unix, Linux or Mac OS X, then you can use OSProcess and
CommandShell for this. Use a Monticello browser to load these packages
from SqueakSource:

  http://www.squeaksource.com/OSProcess
  http://www.squeaksource.com/CommandShell

Look for classes ProxyPipeline and PipeableOSProcess. Either of these will
do what you want. Based on your description of what you want to do, I
think that ProxyPipeline may be the better choice, because it works at
a higher level and cleans up after itself after you run the command.

The basic idea is to evaluate something like this:

  (ProxyPipeline command: 'ls | cat | wc') upToEndOfFile

So if you hook this up to your button, you should have what you want.

Additional information is here:

  http://wiki.squeak.org/squeak/708
  http://wiki.squeak.org/squeak/1914

If you are using Windows, this will not quite work, so look for package
ProcessWrapper on SqueakSource.

Dave