Messages in this thread | | | Date | Wed, 12 Nov 2003 18:32:01 +0100 | From | Jens Axboe <> | Subject | Re: ide cdrom sg like access / rpcmgr ? |
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On Wed, Nov 12 2003, Linus Torvalds wrote: > > On Wed, 12 Nov 2003, Jens Axboe wrote: > > > > To make the below work, all you probably need to do is change sgio() to > > use CDROM_SEND_PACKET for instance. That'll work in 2.4 and 2.6. You > > just need to fill a cdrom_generic_command and send it to the cdrom fd. > > Don't forget: you also need to open the device with "O_NONBLOCK", so as to > not make the kernel try to figure out the media etc. Otherwise you can't > do anything with media that the kernel can't figure out (ie empty media > that hasn't been written to, or even no media at all). > > Depending on what your tool is for, this may or may not be a problem, of > course. If you only want to send commands to a drive that already has a > readable media in it, you can skip the O_NONBLOCK.
Yes of course, you are absolutely right.
-- Jens Axboe
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