Re: Is this program open?
Re: Is this program open?
- Subject: Re: Is this program open?
- From: John Stiles <email@hidden>
- Date: Thu, 13 Apr 2006 11:27:15 -0700
On Apr 13, 2006, at 11:16 AM, Douglas Davidson wrote:
On Apr 13, 2006, at 11:07 AM, John Stiles wrote:
I don't know the details here, but I do know that the Carbon
Process Manager can reliably tell you the location of any process
with a PSN. It's also apparently less work than the
alternatives ;) So I'm still leaning that way, although it's
imperfect.
Bear in mind that a running process need not necessarily have a
location in the file system. For example, it is perfectly possible
to launch an executable, leave it running, and delete the file from
which it was launched, leaving the process none the worse. It
sounds like the Carbon Process Manager is what you are looking for,
but what you want may not always be achievable.
Here's the original question. I think it's an achievable goal.
Given a path (or FSRef/NSURL/whatever) to an application's executable:
/Volumes/MyHD/MyApp.app/Contents/MacOS/MyApp
I want to check to see if this executable is running, hopefully in
a semi-lightweight way (I may be doing this several times for
different apps). It would be cool if the same technique worked for
command-line tools too, but that's not a strict requirement.
Everything else in the discussion is just a means to this end.
The only case where I can see this being impossible is transient cases
—i.e., I see that the app is not running, so I flag it as all-clear,
and then the app starts running a second later. However, that's not
something I'm really concerned about in practice. (It would basically
require the end user to sabotage my app on purpose, and in that case,
so what :) )
The question got turned around because that's how -
launchedApplications works. _______________________________________________
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