In article <mailman.1104.1252376076.2854.python-l...@python.org>, <exar...@twistedmatrix.com> wrote: >On 12:57 am, a...@pythoncraft.com wrote: >>In article <d103be2b-3f1e- = >>46f3-9a03-46f7125f5...@r5g2000yqi.googlegroups.com>, >>Nicolas Dumazet <nicd...@gmail.com> wrote: >>> >>>kqueue has the limitation that kern.kq_calloutmax is usually set >>>at 4096. Meaning that one could not use this on a big (Mercurial) >>>repository with 5k files. FSEvents on the other hand saves us the >>>trouble to have to register each file individually. Also, I am not >>>quite sure if we can use kqueue to register a directory, to be warned >>>when a file is created in this directory. >> >><sigh> %(obscenity)s I didn't realize that you had to register each >>file individually with kqueue. We were hoping to avoid having to write >>watcher code because that is not reliable for renames (especially >>multiple renames in quick succession). >> >>Maybe we'll try using /dev/fsevents directly.... > >Just a guess, but since the kqueue interface is based on file >descriptors, not on file names, following renames reliably shouldn't be >a problem with it. If someone knows about this for sure though, it'd >be nice to hear about it. :) All of the kqueue documentation I've seen >has been rather incomplete.
You misunderstood: * The problem with kqueue is that you are limited in the number of files you can watch * The problem with FSEVents is that you don't get informed about changes to individual files There's no direct equivalent to Linux inotify or Windows ReadDirectoryChangesW. Supposedly you can use /dev/fsevents directly to obtain the raw info used by FSEvents, but you have to run as root, and it's not a documented API. There's the kauth API (designed for virus checkers), but that requires writing code that hooks directly into the kernel, with concommitant care. http://www.osxbook.com/blog/2008/07/23/extending-hfsdebug/ -- Aahz (a...@pythoncraft.com) <*> http://www.pythoncraft.com/ "To me vi is Zen. To use vi is to practice zen. Every command is a koan. Profound to the user, unintelligible to the uninitiated. You discover truth everytime you use it." --re...@lion.austin.ibm.com -- http://mail.python.org/mailman/listinfo/python-list
