looking for error codes

Warner Losh imp at bsdimp.com
Mon Apr 4 03:35:23 UTC 2011

On Apr 3, 2011, at 12:06 PM, Pawel Jakub Dawidek wrote:

> On Fri, Apr 01, 2011 at 06:18:54PM +0300, Andriy Gapon wrote:
>> on 01/04/2011 18:04 Andrew Duane said the following:
>>> AFAIK, FreeBSD does not really detect read-only media. This was something I had to add as a small project here at work, and was considering cleaning up to try to get into CURRENT. If there's a real need for it, I could speed that up.
>> Yes, that's exactly the problem that I am looking at.
>> So if you have anything to share it will be greatly appreciated at least by me.
>> But I think many more people could benefit from it (e.g. those having SD/SDHC/etc
>> cards).
> Once you detect read-only media, I suggest to implement the support by
> adding new DISKFLAG_READONLY to disk(9) API and simply deny write access
> in g_disk_access() when DISKFLAG_READONLY is set.

And if I pop out the SD card and flip the switch, what then?


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