-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Bernd Walter wrote: > On Sat, Jun 07, 2008 at 01:18:41PM -0400, Chuck Robey wrote: >> -----BEGIN PGP SIGNED MESSAGE----- >> Hash: SHA1 >> >> I can't seem to find how many /dev/usbN bus devices there can be. I'm >> writing >> some code that scans them all looking for anything that has my device, but I >> while I know to start at usb0, just how high do I go? There seem to be 128 >> device minors, is that the number? (from dev/usb/usb.h) > > There shouldn't be a limit anymore. > I can't see any definition of 128 in usb.h that limits the number of > busses. > The major/minor differenciation is long time ago. > You must be looking at old code. >
I was trying to find a good way to do scanning, whjen I create the files like /dev/usb0, how far to go in my loop? Does the lowest available device always get created? That would imply that as soon as I began to get "No such device" errors, I could stop iterating. If the rules for picking device filenames are pretty loose, then I could (for instance) stop scanning, say, 4 numbers past the first "No such device" returnee. Any idea on this? I didn't see this i nthe code, but I just need some sane limit on what filenames to scan about in. I look for item info, and if the usb vendor and prodict look friendly, I just snag the filename involved, and use that. Like, a scan of the usb1 bus might yield me a uhid0 which might be my meat, whereupon I coulld drop the usb1 open, and replace it with a uhid0 open. There's more than 1 place that my devices could show, depending on the user's kernel devices. I just want to have some sane limit on how many usb buses I open for my scanning. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.4 (FreeBSD) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFIS+m6z62J6PPcoOkRAgBoAJ0XYYfUat/fJDChSybpNtFzCwUr9ACdGxNf UoCeHzvriXfQ+bj5LDxE8vA= =sTcT -----END PGP SIGNATURE----- _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]"