Messages in this thread | | | Date | Fri, 19 Feb 1999 18:28:43 +0000 | From | Harald Koenig <> | Subject | Re: Ejecting a mounted CD-ROM works :-( |
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On Feb 19, Raphael Becker wrote:
> Jeff Epler wrote: > > > > On Fri, Feb 19, 1999 at 08:30:14AM +0100, Gerd Knorr wrote: > > > If you ask the kernel for ejecting the cdrom (CDROMEJECT ioctl), you'll > > > get a EBUSY. > > > > > > cdrecord talks directly to the device (via generic scsi), therefore > > > the kernel can't block the eject attempt. > > > > Should we disallow generic scsi access to a device that's otherwise in use? > > How hard is this to do? > > The kernel should allow access to only a specific device (eg the > cd-recorder). accesses to other devices sould be blocked by the kernel > (in the kernel-setup you have to give a list of BUS/ID/LUN-Komponents > the kernel should allow to control by software OR you have an external > software, which tells the kernel which device may be accessed by using > general scsi-interface). > This feature should make roasting a cd less unsecure and we may think > about a non-root cd-record.
completely blocking generic scsi access for a device in use is a _bad_ idea because then /dev/sg* can't be used anymore for mode selects, config changes etc. on the (mounted) system disk.
using an `external program' to (b)lock/un(b)lock some devices (CDR) might be a better idea...
Harald -- All SCSI disks will from now on ___ _____ be required to send an email notice 0--,| /OOOOOOO\ 24 hours prior to complete hardware failure! <_/ / /OOOOOOOOOOO\ \ \/OOOOOOOOOOOOOOO\ \ OOOOOOOOOOOOOOOOO|// Harald Koenig, \/\/\/\/\/\/\/\/\/ Inst.f.Theoret.Astrophysik // / \\ \ koenig@tat.physik.uni-tuebingen.de ^^^^^ ^^^^^
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