note 44638 added to ref.fam
| From: | benadler-at-gmx-d-o-t-net at osu1 dot php dot net | Date: | Wed, 11 Aug 2004 17:57:22 +0000 |
| Subject: | note 44638 added to ref.fam | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-74484@lists.php.net to get a copy of this message | ||
in the example above, I would not use the while(1) and sleep() functions, since then you're
back at waiting and polling for file changes, which you were trying to avoid using fam.
Instead, you can use while(fam_next_event($resource)), which blocks until there is an event. No
polling, no useless wasting of cpu cycles.
Anyway, I have some problems with fam: It is very limited and almost useless.
- You cannot monitor a directory tree easily, since fam_monitor_directory() is non-recursive. Its
an ugly hack, but you can go through each subdir and also monitor it with fam_monitor_directory().
- When you do that, you will have another problem: The events you get contain the code and the
filename, but not the pathname of the file that caused the event. Thus, if you monitor two or more
directories, and they possibly contain files with the same basename, you cannot find out what file
has changed. One ugly solution might be to create a new fam_resource for each directory you want to
monitor, but then you cannot use fam_next_event() in your while loop anymore.
- When a big file is saved (i.e. with photoshop via samba), you get file_changed events pretty much
every second the file is being written to. It is not possible to receive ONE event AFTER the file
operation is done.
I'm not sure, but I think most of this is not PHPs fault. Its just that fam (or dnotify, which
fam uses on linux) sucks very badly. If you search on google, it seems everyone hates fam/dnotify
(even linus), but noone has done anything about it yet.
If you find out how to work around thing, or if I'm completely wrong about all of this, please
post here! Thanks!
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