[Mono-list] Problem calling ioctl() on 32bit systems, works on 64bit
Natalia Portillo
claunia at claunia.com
Fri Jan 29 04:12:30 UTC 2016
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Ok I found the problem, the ioctl number must be 32bit (still works
like that on 64bit systems) or displaces the pointer.
El 29/1/16 a las 3:51, Natalia Portillo escribió:
> On a follow up I have made a little C snippet to intercept the
> ioctl() call.
>
> On 64 bit: Received fd=3, request=8837, pointer=0x7ffce86ac3b8
>
> On 32 bit: Received fd=3, request=8837, pointer=(nil)
>
> El 29/1/16 a las 2:36, Natalia Portillo escribió:
>> Hi all,
>
>> I've got stuck trying to solve why calling Linux ioctl() on 64bit
>> systems works perfectly but on 32bit ones doesn't.
>
>> I have checked the marshalling size, and is as expected (64
>> bytes). Trying to strace on my 32bit system give "ioctl(3, SG_IO,
>> 0)".
>
>> I have the structure defined in
>> https://github.com/claunia/DiscImageChef/blob/master/DiscImageChef.De
v
>
>>
ic
>
>
>
> es/Linux/Structs.cs
>
>> DllImport defined in
>> https://github.com/claunia/DiscImageChef/blob/master/DiscImageChef.De
v
>
>>
ic
>
>
>
> es/Linux/Extern.cs
>
>> And the calling code in
>> https://github.com/claunia/DiscImageChef/blob/master/DiscImageChef.De
v
>
>>
ic
>
>
>
> es/Linux/Command.cs
>> method SendScsiCommand()
>
>> I have absolutely no clue at this time on why this is happening,
>> so any help is welcome.
>
>> Regards, Natalia Portillo
>> _______________________________________________ Mono-list
>> maillist - Mono-list at lists.ximian.com
>> http://lists.ximian.com/mailman/listinfo/mono-list
>
> _______________________________________________ Mono-list maillist
> - Mono-list at lists.ximian.com
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