[Cuis-dev] OSProcess command: '.....' --> How do I detect if the process has terminated?

[lewis at mail.msen.com]

Hello Hannes,

Try this:

child := OSProcess command: 'ps'.
child printString. "==> 'an ExternalUnixOSProcess with pid 42622 on 
/bin/sh (complete, normal termination with status 0)'  "
child isComplete. "==> true"

When using OSProcess like this, you are creating a child unix process 
that runs the /bin/sh executable program, which is a unix shell that 
then runs the /usr/bin/ps program (or whatever other program you want to 
run). From the Cuis image, the /bin/sh program is the child of your VM 
image, and the /usr/bin/ps program is the child of the /bin/sh program. 
 From Cuis, you can see the run status (and exit status) of the /bin/sh 
program, although you cannot directly see the results of the program 
that the shell was running. Although limited, this should be enough 
information to tell you if your program has run to completion.

Better handling of child processes, pipes, exit status and so forth is 
provided by the CommandShell package, which is designed to work with 
OSProcess. However, CommandShell is not yet available for Cuis. 
Nevertheless, the simple OSProcess class>>command: implementation is 
sufficient for many things.

HTH,

Dave

On 2025-03-10 21:15, H. Hirzel via Cuis-dev wrote:

> Hi
> 
> I want to use OSProcess to  do file conversions with pandoc *
> 
> OSProcess command: 'pandoc  --from=Markdown  --to=DocBook  
> C:\Users\Hirzel\Documents\Cuis-Smalltalk-7061-UserFiles\manual.txt 
> --output=C:\Users\Hirzel\Documents\manual.xml'
> 
> The conversion process runs in a separate thread. How can I determine 
> if the thread has terminated e.g. to start processing manual.xml.
> 
> I do not necessarily mind if the UI is blocked.
> 
> Regards
> 
> Hannes
> 
> ------------------------------
> 
> * https://pandoc.org/
> 
> a universal document converter, e.g. from Markdown to Docbook, docx, 
> html etc.
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