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Re: spawn question [message #60610 is a reply to message #60609]

Sat, 31 May 2008 04:59

Kenneth P. Bowman
Messages: 585
Registered: May 2000

Senior Member

In article
<33a84552-1576-4ca3-a670-3f37064bf63c@59g2000hsb.googlegroups.com>,
russ <rlayberry@hotmail.com> wrote:

> this may be a tupid question and it might be that i am an idiot,
> but...
>
> i want to spawn a process
>
> cmd='ls -l'
> spawn,cmd
>
> i am actually doing this with a GET command and it sometimes hangs
>
> if i try
>
> spawn,cmd,/nowait
>
> it tells me
>
> Keyword NOWAIT not allowed in call to: SPAWN
>
> but it says it is in the help?

/NOWAIT only works on Windows. Are you running on Unix/Linux/Mac OS?

Use the standard Unix syntax to run a procedure in the background

SPAWN, 'ls -l &', result

Of course, then you get this

IDL> spawn, 'ls -l &', result
IDL> help, result
RESULT STRING = Array[1]
IDL> print, result
[1] 4624

If you want to actually see the output of ls, you will have to run
it in the foreground

IDL> spawn, 'ls -l', result
IDL> help, result
RESULT STRING = Array[41]

Ken Bowman

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[Message index]

		Re: spawn question By: Kenneth P. Bowman on Mon, 02 June 2008 06:48
		Re: spawn question By: Vince Hradil on Sun, 01 June 2008 15:41
		Re: spawn question By: russ[1] on Sun, 01 June 2008 12:25
		Re: spawn question By: Vince Hradil on Sun, 01 June 2008 11:33
		Re: spawn question By: russ[1] on Sun, 01 June 2008 11:09
		Re: spawn question By: Vince Hradil on Sat, 31 May 2008 09:21
		Re: spawn question By: Kenneth P. Bowman on Sat, 31 May 2008 04:59

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