Passive Shell Commands

Ray Horsley ray at
Tue Oct 8 23:05:47 EDT 2013

Ahh!  Now it's really working well.

Monte, thanks.  Very helpful.


On 10/8/2013 10:57 PM, Monte Goulding wrote:
> On 09/10/2013, at 1:45 PM, Ray Horsley wrote:
>> First time using open process for me.  Fascinating!  Thanks Monte. Not quite sure on the write and read syntax.
>> My original shell command which works fine is:
>>    get shell(""&appPath&" "&srcPath&" "&trgPath&"")
>> where the app is a command line utility which converts a PDF file to multiple JPEG's
>> I can't get the app to show up in 'the openProcess' using the 'neither' option.  When I call 'open process appPath for update' it works fine, but then how would I send the open process a command to start the conversion?
> Ah, I assumed you didn't need to read from the process. If you don't need to read or know when it's done then:
> open process appPath&" "&srcPath&" "&trgPath for neither
> If you need to know when it's done then something like this should do it (untested hacking in email client)
> put appPath&" "&srcPath&" "&trgPath into tProcess
> open process tProcess for read
> send "ReadProcess tProcess" to me in 0 milliseconds
> on ReadProcess pProcess
>    local tOut
>    repeat
>       read from process pProcess in 5 milliseconds
>       put it after tOut
>       wait 20 milliseconds with messages
>       if the result is "eof" then
>          close process pProcess
>          exit repeat
>       end if
>    end repeat
>    PDFExported tOut
> end ReadProcess
> on PDFExported pOutput
>    -- let the user know
> end PDFExported
> --
> M E R Goulding
> Software development services
> Bespoke application development for vertical markets
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