Re: [Cdrtools-support] Can I use libscg to send vendor specific SCSI command cross-platform?

[Tao W. <twa...@gm...>]

On 18 January 2016 at 23:42, Joerg Schilling
<Joe...@fo...> wrote:
>
>
> Libscg is the most portable solution you may find.
>
> OS X is the only non-orthogonal OS in the list of supported OS. Note that
> libscg supports aprox. 30 different OS types.
>
> Does your project already work on more than one platform?
> If yes, how does it implement this feature?


We generalized the API we need, such as 'scsi_read()' and
'scsi_write()',  then, implemented those API for Linux and Windows
separately.

Here is the implementation:
https://github.com/asalamon74/pktriggercord/blob/master/pslr_scsi_linux.c
https://github.com/asalamon74/pktriggercord/blob/master/pslr_scsi_win.c

So, basically, we use '/sys/class/scsi_generic' with 'ioctl()'  for
Linux, and 'DeviceIoControl()' with 'IOCTL_SCSI_PASS_THROUGH_DIRECT'
for Windows.


> BTW: If you ever write an own driver or if you find somebody who did or who is
> willing to do this for you, please keep me informed as I would be interested to
> use this for better OS X support in libscg.
>
> Jörg

There are 2 driver candidates I might look into if I'm going to
implement my own OSX kernel driver.

The first one is the blog written by Joel Reymont:

http://wagerlabs.com/blog/2008/02/04/writing-a-mac-osx-usb-device-driver-that-implements-scsi-pass-through/

And here is the code for it:

https://github.com/wagerlabs/seaforth24

Another one is 'OS-X-SAT-SMART-Driver' written for 'smartmontools':

https://github.com/kasbert/OS-X-SAT-SMART-Driver

I hope these will help.

Best Regards,
Tao Wang