[Israel.pm] How to detect a new file in a directory without busy wait ?

[Yossi Itzkovich]

Thanks 

-----Original Message-----
From: perl-bounces at perl.org.il [mailto:perl-bounces at perl.org.il] On
Behalf Of Tal Kelrich
Sent: Thursday, March 27, 2008 1:06 PM
To: perl at perl.org.il
Subject: Re: [Israel.pm] How to detect a new file in a directory without
busy wait ?

On Thu, 27 Mar 2008 12:36:18 +0200
Yossi Itzkovich <Yossi.Itzkovich at ecitele.com> wrote:

> Tal,
> I work on Solaris. Isn't there a portable module around ?
> 
> Yossi 
> 

Not as far as I can tell...

You could try using FAM[1] with SGI::FAM, but I suspect that would fall
back to polling.

A couple of other options might be to stat the directory, check
modification timestamp, rescan if needed.

This[2] discussion looks relevant, but I can't tell if the
file_events_notification thing there is usable.

	Tal

[1] http://oss.sgi.com/projects/fam/
[2]
http://groups.google.ca/group/comp.lang.java.programmer/browse_thread/th
read/c1db45121f5d8530/c826c6952326274b?lnk=raot

> -----Original Message-----
> From: perl-bounces at perl.org.il [mailto:perl-bounces at perl.org.il] On
> Behalf Of Tal Kelrich
> Sent: Thursday, March 27, 2008 12:29 PM
> To: perl at perl.org.il
> Subject: Re: [Israel.pm] How to detect a new file in a directory
> without busy wait ?
> 
> On Thu, 27 Mar 2008 11:50:35 +0200
> Yossi Itzkovich <Yossi.Itzkovich at ecitele.com> wrote:
> 
> > Hi,
> > 
> > I have a script that should wait for a new file to be created, and
> > then start processing it. I don't know the filename, just the
> > pattern (known prefix).  I can do it  like this
> > 
> > While (1)
> > {
> > 	get directory content
> > 	check each file for filename pattern. If found - last.
> > 	sleep for few 100ms
> > }
> > 
> > But I guess there is a more elegant way.  Is there ?
> > 
> 
> You should look at Win32::ChangeNotify and Linux::Inotify2, depending
> on your platform.
> 
> Cheers,
> 	Tal

-- 
Tal Kelrich
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