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Re: Subject : locks, semaphores, and such [message #29110 is a reply to message #29027]

Wed, 30 January 2002 15:18

Ken Mankoff
Messages: 158
Registered: February 2000

Senior Member

On Wed, 30 Jan 2002, Nigel Wade wrote:

> Ken Mankoff wrote:
>> On Tue, 29 Jan 2002, Nigel Wade wrote:
>>> If you're going to spawn a process, why not base the directory name on
>>> the PID of the spawned process, and return the directory name to IDL? Two
>>> concurrent processes cannot have the same PID.
>>
>> This would work too... a brief expriment tells me that I do not know
>> how to capture a pid through IDL. Do you have any ideas (or code? :)
>
> Do you need to know the PID in IDL? I'd just return the directory name
> created by the spawned process. Output sent to stdout by a spawned process
> is returned to IDL in the final argument to the SPAWN command:
>
>>> spawn,'echo hello',result
>
> would return the output 'hello' in the variable result. So all you would
> need to do is echo the name of the directory created (and make sure that's
> all that the spawned process outputs) and you get what you need.
>

Hi,

The PID approach has solved it. I am now using this:

SPAWN, 'true', PID=PID

and then generating a directory off of a combination of the PID and
SYSTIME(1)

Thanks for the help,
Ken Mankoff

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Kenneth Mankoff
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http://lasp.colorado.edu/~mankoff/
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[Message index]

		Re: Subject : locks, semaphores, and such By: Nigel Wade on Wed, 30 January 2002 03:55
		Re: Subject : locks, semaphores, and such By: Craig Markwardt on Tue, 29 January 2002 19:25
		Re: Subject : locks, semaphores, and such By: Ken Mankoff on Tue, 29 January 2002 09:20
		Re: Subject : locks, semaphores, and such By: Nigel Wade on Tue, 29 January 2002 08:42
		Re: Subject : locks, semaphores, and such By: Ken Mankoff on Tue, 29 January 2002 07:32
		Re: Subject : locks, semaphores, and such By: Martin Downing on Tue, 29 January 2002 05:28
		Re: Subject : locks, semaphores, and such By: Ken Mankoff on Mon, 28 January 2002 09:17
		Re: Subject : locks, semaphores, and such By: Paul van Delst on Mon, 28 January 2002 07:25
		Re: Subject : locks, semaphores, and such By: Ken Mankoff on Wed, 30 January 2002 15:18

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