[Mono-list] Problem calling ioctl() on 32bit systems, works on 64bit

Natalia Portillo claunia at claunia.com
Fri Jan 29 03:51:24 UTC 2016


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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.Dev
ic
>
>
> 
es/Linux/Structs.cs
> 
> DllImport defined in 
> https://github.com/claunia/DiscImageChef/blob/master/DiscImageChef.Dev
ic
>
>
> 
es/Linux/Extern.cs
> 
> And the calling code in 
> https://github.com/claunia/DiscImageChef/blob/master/DiscImageChef.Dev
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
> 
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