Hi Steve, > Several months ago I did a proof of concept shellscript using > inotifywait, which detected USB thumb drive insertion and removal. It > worked just fine, and if I'd wanted to spend more than 30 minutes, a > combination of tweaking sudoers and writing a few shellscripts could > have given instant mounting of thumb drives (and probably DVDs).
That's basically what vdevd-user would do. The only difference between using inotifywait is that the user would be able to transfer his/her knowledge of setting up vdevd to setting up vdevd-user (since they use the same config file format). Of course, the choice is entirely the user's--vdevd-user would be only one of many approaches to running unprivileged code in response to a device appearing or disappearing :) > I understand that FreeBSD has kqueue and kevent, which apparently do > some of the same things. According to > http://en.wikipedia.org/wiki/Kqueue , it's available in all the major > BSDs. So your idea sounds doable, always assuming you can make a high > level interface that calls either inotify or kqueue. It's already done by libkqueue: https://github.com/mheily/libkqueue. vdevd-user would just link against libkqueue. -Jude On Tue, Mar 17, 2015 at 10:16 AM, Steve Litt <[email protected]> wrote: > On Tue, 17 Mar 2015 04:48:46 -0400 > Jude Nelson <[email protected]> wrote: > > > > How would that "watching" work? > > > > vdevd-user would have an inotify(2)-based back-end (hopefully via > > libkqueue, so it would be portable). The back-end would set up > > inotify watches on /dev and its descendant directories, and translate > > creat(2) and unlink(2) events from inotify into a vdev-specific > > device event with the relevant information (e.g. by querying the > > device metadata that the system's vdevd puts into /dev/vdev/...). > > > > -Jude > > Several months ago I did a proof of concept shellscript using > inotifywait, which detected USB thumb drive insertion and removal. It > worked just fine, and if I'd wanted to spend more than 30 minutes, a > combination of tweaking sudoers and writing a few shellscripts could > have given instant mounting of thumb drives (and probably DVDs). > > I understand that FreeBSD has kqueue and kevent, which apparently do > some of the same things. According to > http://en.wikipedia.org/wiki/Kqueue , it's available in all the major > BSDs. So your idea sounds doable, always assuming you can make a high > level interface that calls either inotify or kqueue. > > > SteveT > > Steve Litt * http://www.troubleshooters.com/ > Troubleshooting Training * Human Performance > > _______________________________________________ > Dng mailing list > [email protected] > https://mailinglists.dyne.org/cgi-bin/mailman/listinfo/dng >
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