comp.lang.idl-pvwave archive: archive » Capturing output from SPAWN

Home » Public Forums » archive » Capturing output from SPAWN

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: Capturing output [message #31283 is a reply to message #11565]

Mon, 24 June 2002 12:48

Craig Markwardt
Messages: 1869
Registered: November 1996

Senior Member

"Ian Dean" <Ian.d.dean@baesystems.com> writes:
> Hi,
> A long shot, as I'm using IDL 5.4 under OpenVMS 7.1.
>
> Is there a way of running a sub-process (perhaps using SPAWN) and capture
> its output as it happens to a text widget. I am aware I could use the RESULT
> keyword, but that is only available when the SPAWNed process completes.
>
> It may be possible to use a CALL_EXTERNAL using mailboxes to communicate,
> but this seems a bit heavy handed.
>
> I can always supply more info if required.

The only way to do this directly appears to be with the UNIT keyword,
which is not available from VMS.

However, as Reimar says, perhaps you can write the data to a file. If
you SPAWN it using NOWAIT, then your IDL process regains control
immediately while the job runs in parallel. Then your IDL process can
periodically check the temporary file for more output and load it into
the widget as needed.

Craig

Report message to a moderator

[Message index]

		Capturing output from SPAWN By: Dan Peduzzi on Fri, 17 April 1998 00:00
		Re: Capturing output By: Dave Greenwood on Mon, 24 June 2002 13:27
		Re: Capturing output By: Craig Markwardt on Mon, 24 June 2002 12:48
		Re: Capturing output By: R.Bauer on Mon, 24 June 2002 08:54

Previous Topic:	"Program Code area full" error message
Next Topic:	Re: axis is too thin? - test.ps (0/1)

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Thu Oct 16 20:47:08 PDT 2025

Total time taken to generate the page: 0.01820 seconds