[8730] in linux-scsi channel archive
Re: How to send scsi command using sd interface ?
daemon@ATHENA.MIT.EDU (Douglas Gilbert)
Sun Apr 30 23:28:10 2000
Message-ID: <390CED8C.6BD532F@interlog.com>
Date: Sun, 30 Apr 2000 22:35:56 -0400
From: Douglas Gilbert <dgilbert@interlog.com>
MIME-Version: 1.0
To: Sergey Vichik <SVichik@store-age.com>
Cc: linux-scsi@vger.rutgers.edu
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Sergey Vichik wrote:
>
> Hello,
>
> If any body knows how to send SCSI command using sd file : for example
> /dev/sda,
> Please let me know .
>
> I tried ioctl() using SCSI_IOCTL_SEND_COMMAND command, it doesn't work.
>
> SCSI_IOCTL_SEND_COMMAND equals to 1, it seems to be too small value for
> such ioctl command.
Within the limits put on SCSI_IOCTL_SEND_COMMAND (e.g. no transfer
greater than PAGE_SIZE length) it seems to work quite well.
Even though the sg driver is an alternate way to do the same thing,
there is an example of using that ioctl() [in scsi_inquiry.c]
in the utilities package. Also the sg documentation outlines
that ioctl's usage. See the information at:
http://www.torque.net/sg
The only successful return value from that ioctl() is 0, all other
values imply some error.
Doug Gilbert
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