Date: Fri, 17 Sep 1999 08:53:10 -0700 (PDT) From: John Polstra <jdp@polstra.com> To: John-Mark Gurney <gurney_j@resnet.uoregon.edu> Cc: current@FreeBSD.ORG Subject: Re: An FS question perhaps... non blocking I/O. Message-ID: <XFMail.990917085310.jdp@polstra.com> In-Reply-To: <19990916232849.35971@hydrogen.fircrest.net>
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John-Mark Gurney wrote: > John Polstra scribbled this message on Sep 12: >> >> Just to avoid duplicated effort: I currently have work in progress >> on a "fslog" pseudo-device. It enables you to monitor a filesystem >> and receive notifications for all interesting changes to files and >> directories. This includes reads, writes, renames, file creations, >> unlinks, links, etc. -- anything that changes the stat(2) results >> for a file, or causes directory entries to be created, destroyed, or >> changed. The device itself is working, but so far I have implemented >> the support for only a few of the event types. It won't take much >> more work to finish it. > > ugh, why aren't you extending poll to work on files and directories to > get this info?? it would make MUCH more sense to extend poll to do this.. > > any specific reason why it wasn't done this way? Yes. Last time I checked, our CVS repository contained 50,000 files in 13,000 directories. Somehow the thought of a 63,000-element pollfd array leaves me cold. Sometimes you want to know about all changes in a whole tree of files. Poll isn't well-suited for that. John --- John Polstra jdp@polstra.com John D. Polstra & Co., Inc. Seattle, Washington USA "No matter how cynical I get, I just can't keep up." -- Nora Ephron To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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