I've tried all of them. -n -O one other. Apparently looking at the google 
results, lsof is simply by nature DOG SLOW. I mean dying dog with 2 broken legs 
and a clowder of cats scratching it's eyes out slow. I've checked Applescript 
forums too. Apprently there is no damned good way to tell if a file is open on 
a Mac without using the API provided by the OS. Sometimes Apple takes my breath 
away. And not in a good way. 

Bob S


> On May 17, 2019, at 17:07 , Mark Wieder via use-livecode 
> <use-livecode@lists.runrev.com> wrote:
> 
> On 5/17/19 4:59 PM, Bob Sneidar via use-livecode wrote:
>> Okay I am using lsof in a shell command to see if the file open flag is set. 
>> It's taking SIXTEEN SECONDS! Any ideas on a better way to check to see if a 
>> file is open?
> 
> What options are you using for the lsof command?
> 
> 
> -- 
> Mark Wieder
> ahsoftw...@gmail.com


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