How to check for a new file in a given directory? 1

[HotMadras]

The subject says it all really. I want to be able to trigger an event when a new file is discovered in a given directory. I have a VB program that's rather cumbersome and doesn't really suit the environment it's being used in that I'd like to port to tcl. It uses a timer to decide when to check for new files. I was hoping to be able to use something like fileevent instead, so that the reaction is as near instantaneous as possible.

 

[Bong]

Fileevent is really a socket or channel function. It doesn't do what you want ("Execute a script when a channel becomes readable or writable&quot. I would probably use "glob" and keep an old list to compare to the result. Bob Rashkin
rrashkin@csc.com

 

[HotMadras]

Thanks, I think I've come up with a routine that will do what you suggested. I presume I'll have to run it with some sort of timer, then?

 

[Bong]

Either that or based on events in your code when you would act on that information. Bob Rashkin
rrashkin@csc.com

 

[HotMadras]

Thanks for your replies. I think that, provided the overhead doesn't turn out to be too horrible, I'm going to use "after" to pause the application between checks. I have to poll the directory as I've got no other way of determining if something new has arrived.

Thanks again.

 

[AviaTraining]

You might also want to check the Tcl'ers Wiki (

http://wiki.tcl.tk).

It has a page called, "directory notification package in Tcl,"

http://mini.net/tcl/3643,

which has some interesting comments and suggestions regarding what you're trying to do. - Ken Jones, President, ken@avia-training.com
Avia Training and Consulting,

http://www.avia-training.com

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