Messages in this thread | | | Date | Wed, 11 Apr 2007 12:31:02 +0100 | From | Alan Cox <> | Subject | Re: broken device locking, sg vs. sg_io on block devices |
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> > Can we do following without having side effects: > > > > open("/dev/sr0",O_EXCL|O_RDWR); /* no matter what it returns */ > > fcntl(..., F_SETLK); /* no matter what it returns */ > > ioctl(f, SCSI_IOCTL_GET_IDLUN, &x); > > ioctl(f, SCSI_IOCTL_GET_BUS_NUMBER, &jo); > > > > Can you guarantee us that bit?
open() has side effects. The CD layer allows you to open with O_NDELAY if you want to avoid them.
> [1] and when we get real critical questions then everything we get is > radio silence? Very kindly. NOT.
Given the attitude that was shown before be glad I'm even bothering to reply to this.
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