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Date: Thu, 14 Feb 2013 15:36:55 +0100
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Subject: Re: [PHP-DEV] File system watcher/monitoring
From: ivan.enderlin@hoa-project.net ("Ivan Enderlin @ Hoa")

Hi Mike,

On 14/02/13 15:18, Mike Ho wrote:
> Just a quick note, FileSystemWatcher in .NET is actually not recommende=
d for use by Microsoft.
>
> It does not guarantee that an event will be raised on every new file or=
 file mod in a given folder=85 and it's even less determinstic when tryin=
g to deal with network share drives.
>
> Microsoft's own developer blogs usually recommend that people roll thei=
r own polling-based solution instead of depending on FileSystemWatcher (g=
oogling FileSystemWatcher will yield many many results regarding this).
>
> I'm not necessarily saying that the overall idea is without merit=85 bu=
t it's just that if someone does want to try and implement something like=
 this on Windows, they should try and avoid whatever Win32 API calls that=
 FileSystemWatcher uses.
Ok, thank you for the note. I didn't look deeply in Windows API, just=20
Mac OS X and Linux for the moment=85 Thank you again.


>
> --Mike
>
> On Feb 14, 2013, at 6:03 AM, Ivan Enderlin @ Hoa <ivan.enderlin@hoa-pro=
ject.net> wrote:
>
>> Hi internal,
>>
>> A missing feature in PHP is a file system watcher/monitoring available=
 for almost all platforms. On Linux, we have inotify (available in PHP th=
rough pecl/inotify), on Mac OS X, we have /dev/fsevents (not available in=
 PHP, since we need ioctl to do that in pure PHP =97and sudo=97, no C ext=
ension needed), on FreeBSD, we have FAM, and on Windows, we have FileSyst=
emWatcher in .NET. All major platforms have a solution ready to use.
>>
>> By now, if we didn't use these solutions, we should use a finder (than=
ks to RecursiveIteratorIterator and DirectoryIterator in SPL) that runs e=
very n seconds and compute a diff with the previous run. This solution wo=
rks fine for a small set of files but it can slow for a big one. This is =
just a tricky solution, not a proper one.
>>
>> Possible domains where it is needed: test, CI, log, file transfering, =
security etc.
>>
>> Is it possible to have such a feature landing in PHP (core if karma al=
lows it)? or do you want such a feature?
>>
>> Best regards :-).
>>
>> --=20
>> Ivan Enderlin
>> Developer of Hoa
>> http://hoa-project.net/
>>
>> PhD. student at DISC/Femto-ST (Vesontio) and INRIA (Cassis)
>> http://disc.univ-fcomte.fr/ and http://www.inria.fr/
>>
>> Member of HTML and WebApps Working Group of W3C
>> http://w3.org/
>>
>>
>>
>> --
>> PHP Internals - PHP Runtime Development Mailing List
>> To unsubscribe, visit: http://www.php.net/unsub.php
>>
>

--=20
Ivan Enderlin
Developer of Hoa
http://hoa-project.net/

PhD. student at DISC/Femto-ST (Vesontio) and INRIA (Cassis)
http://disc.univ-fcomte.fr/ and http://www.inria.fr/

Member of HTML and WebApps Working Group of W3C
http://w3.org/