Arjan van de Ven <[email protected]> wrote:
> On Wed, 2006-08-16 at 14:37 -0400, Lennart Sorensen wrote:
>> Perhaps the real problem is that some @#$@#$ user space task is
>> constantly trying to mount the disc while something else is trying to
>> write to it.
>>
>> gnome and kde both seem very eager to implement such things. perhaps
>> there should be a way to prevent any access by such processes while
>> writing to the disc.
>
> there is. O_EXCL works for this.
> Any sane desktop app and cd burning app use O_EXCL already for this
> purpose...
This was discussed to death:
HAL using O_EXCL will randomly prevent burning/mounting/etc by causing a
race condition, so it can't do that. HAL not using O_EXCL will OTOH succeed
in opening despite of O_EXCL used by the burning process and thereby
prevent burning by opening a busy device. The proposed solution was
introducing O_NONE or O_HARMLESS to prevent side-effects from opening
the device.
This will, however, not prevent other users from maliciously destroying the
CD by not using O_EXCL. Chowning the device is not a real solution, since
users should be able to fusermount the CD.
Maybe it's possible to cache the result and thereby prevent repeated
opening from disturbing the burning process.
--
Ich danke GMX dafür, die Verwendung meiner Adressen mittels per SPF
verbreiteten Lügen zu sabotieren.
http://david.woodhou.se/why-not-spf.html
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