Re: Using KQueue events to watch files
Re: Using KQueue events to watch files
- Subject: Re: Using KQueue events to watch files
- From: Keith Ray <email@hidden>
- Date: Fri, 8 Oct 2004 13:42:12 -0700
>
Check out Mike McCracken's stakeout code -
>
http://michael-mccracken.net/blog/blosxom.pl/computers/mac/programming/
>
meetWatch.html, or Calum's variation at
>
http://homepage.mac.com/calumr/main.m
I've had a problem with "folder-watching" in that the app gets
notified of a new file in the folder when the Finder (or whatever)
first creates the file in that folder -- not after the file is
completely written to the folder. If the finder is copying a large
file from a slow server, it could take a while for the file to be
completely written to that folder.
What's worse, unlike MacOS 9 or Windows, is that on MacOS X, opening
and reading the file is allowed even if another process is currently
writing to it. (MacOS X 10.1 used to change the file-type while the
copy was in-process, but 10.2 and 10.3 don't do that, plus we need to
allow users to use other file-copying tools.)
Any idea how we can find out when the file has been closed -- no
longer open in any process?
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