[PD] popen vs shell bug

[Hans-Christoph Steiner]

On Jul 8, 2010, at 3:30 AM, IOhannes m zmoelnig wrote:

> On 2010-07-08 01:09, Hans-Christoph Steiner wrote:
>>
>> I guess there should be a third inlet for the signals?  I see  
>> something
>> like this:
>>
>> STDIN      signals         process name
>> |                  |                    |
>> |                  |                    |
>> [process /usr/sbin/httpd]
>> |                  |                    |
>> |                  |                    |
>> STDOUT  STDERR     status messages, like PID, current process name,
>> state, etc.
>
>
>
> hmm, iirc "process name" is there mainly to override the process given
> as the argument.
>
> sending a new "process name" (e.g. "/usr/sbin/apache2") into the last
> inlet surely won't start the new process, would it?
> for me starting a new process seems to be a very "hot" action.
>
> then i don't see a reason why we need different inlets for "process
> name" and "signals", as both are there to control the the current/ 
> future
> process from "outside".
>
> so i would basically simplify this to the attached interface.
>
>
> as for sending signals: even though i like signals very much, there is
> no such concept on w32 (or at least it is not readily available for  
> the
> little programmer).
> personally i would hate to have the 5th object for the same task  
> that is
> still highly platform dependent.

Your example seems backwards to me.  STDIN is definitely a hot action,  
and most likely the inlet that is going to be used the most.  I  
imagine many users would never change the program that is being run.   
STDOUT will most likely be the main outlet used, i.e the result, so  
that really should be the first outlet.  The process information is  
meta/info/status stuff like in [hid], [comport], etc. so it should be  
the right outlet like them.

I could see combining the signal and process inlets into one second  
meta inlet, but it seems to me that since there are just two messages  
(run and signal), why not just make each have their own inlet and  
spare the patcher from having to build up messages as much.

.hc

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