Getting Rev control back after shell()

Frank D. Engel, Jr. fde101 at fjrhome.net
Wed Jan 12 11:18:40 EST 2005


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That works fine in Terminal, but Rev still waits for the command to 
finish.  Quite stupid, really.

Under Windows, there is a "start" command that can be jury-rigged to do 
this.  Not sure how to handle it under OS X/*nix (believe me, I've been 
trying to figure that one out too).

On Jan 12, 2005, at 10:38 AM, Ken Ray wrote:

> On 1/12/05 9:29 AM, "RGould8 at aol.com" <RGould8 at aol.com> wrote:
>
>>
>> In a message dated 1/11/05 4:04:01 PM, kray at sonsothunder.com writes:
>>
>>
>>> On 1/11/05 2:04 PM, "RGould8 at aol.com" <RGould8 at aol.com> wrote:
>>>
>>>> If I've got a shell() call that executes a unix command that takes 
>>>> awhile
>>> to
>>>> complete (up to 3 minutes), is there a way to give control back to
>>> Revolution
>>>> while it's taking place?
>>>
>>> It depends... do you need to get data back from shell or is it 
>>> purely an
>>> "execute this command" situation?
>>>
>>>
>>>
>> This is a unix call for imaging drives, but I have figured out a way 
>> to route
>> the output from that unix call to a text file.   My hope was to 
>> somehow have
>> Rev start up the disk imaging call process, get control back 
>> immediately, and
>> have Revolution read that text file every 5 seconds to check on the 
>> status.
>> It's the "getting control back immediately" part that's presently the 
>> problem.
>>   Since the same issue occurs when executing the call in Terminal, I 
>> know
>> it's not Rev's fault.   I guess I could just use some unix advice on
>> sublaunching
>> processes.
>
> My understanding is that if you put a "&" after the command for the
> terminal, it causes it to become asynchronous and immediately return. I
> haven't tried it yet, though. You'll need to use the "sh" shell, 
> however.
>
> Here's where I got that info:
>
>   http://www.dartmouth.edu/~rc/classes/ksh/print_pages.shtml
>
> Give it a shot and let us know if it works...
>
>
> Ken Ray
> Sons of Thunder Software
> Web site: http://www.sonsothunder.com/
> Email: kray at sonsothunder.com
>
>
> _______________________________________________
> use-revolution mailing list
> use-revolution at lists.runrev.com
> http://lists.runrev.com/mailman/listinfo/use-revolution
>
>
- -----------------------------------------------------------
Frank D. Engel, Jr.  <fde101 at fjrhome.net>

$ ln -s /usr/share/kjvbible /usr/manual
$ true | cat /usr/manual | grep "John 3:16"
John 3:16 For God so loved the world, that he gave his only begotten 
Son, that whosoever believeth in him should not perish, but have 
everlasting life.
$
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