On Mon, Jan 24 2005, Kasper Sandberg wrote:
> On Mon, 2005-01-24 at 11:46 +1000, Tim Fairchild wrote:
> > On Monday 24 Jan 2005 06:59, Alessandro Suardi wrote:
> > > On Sun, 23 Jan 2005 21:26:55 +0100, Volker Armin Hemmann
> > >
> > > <[EMAIL PROTECTED]> wrote:
> > > > Hi,
> > > >
> > > > have you checked, that cdrecord is not suid root, and
> > > > growisofs/dvd+rw-tools is?
> > > >
> > > > I had some probs, solved with a simple chmod +s growisofs :)
> > >
> > > Lucky you. Burning as root here, cdrecord not suid. Tried also
> > > burning with a +s growisofs, but...
> >
> > You can test if it's the kernel/growisofs clashing by hacking the
> > drivers/block/scsi_ioctl.c code
> >
> > It's around line 193 in 2.6.9, and line 196 in 2.6.10
> > not sure about 2.6.11
> at line 196
> >
> > find the code:
> >
> > /* Write-safe commands just require a writable open.. */
> > if (type & CMD_WRITE_SAFE) {
> > if (file->f_mode & FMODE_WRITE)
> > return 0;
> > }
> >
> > edit it to something like:
> >
> > /* Write-safe commands just require a writable open.. */
> > if (type & CMD_WRITE_SAFE) {
> > printk ("Write safe command in ");
> > if (file->f_mode & FMODE_WRITE)
> > printk ("write mode.\n");
> > else
> > printk ("read mode.\n");
> > return 0;
> > }
> >
> > Compile the kernel with that and that may make it work and burn dvd and let
> > you know if it's growisofs sending incorrect commands. You'll get messages
> > in
> > dmesg like
> >
> > Write safe command in read mode.
> >
> > which means growisofs is still not right. Maybe later version fixed this?
> i got the latest version, and i just did this, nothing of this appeared
> in dmesg, but also, i dont see what scsi_ioctl has to do with anything?
> i dont use scsi emulation
it doesn't have anything to do with ide-scsi scsi emulation,
direct-to-device SG_IO uses drivers/block/scsi_ioctl.c (note the block/
directory, not scsi/).
strange that it doesn't catch anything...
--
Jens Axboe
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