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/*
* Copyright (C) 2007-2008 Intel Corporation
*
* Retrieve drive serial numbers for scsi disks
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <string.h>
#include <scsi/scsi.h>
#include <scsi/sg.h>
#include <sys/ioctl.h>
int scsi_get_serial(int fd, void *buf, size_t buf_len)
{
unsigned char rsp_buf[255];
unsigned char inq_cmd[] = {INQUIRY, 1, 0x80, 0, sizeof(rsp_buf), 0};
unsigned char sense[32];
struct sg_io_hdr io_hdr;
int rv;
unsigned int rsp_len;
memset(&io_hdr, 0, sizeof(io_hdr));
io_hdr.interface_id = 'S';
io_hdr.cmdp = inq_cmd;
io_hdr.cmd_len = sizeof(inq_cmd);
io_hdr.dxferp = rsp_buf;
io_hdr.dxfer_len = sizeof(rsp_buf);
io_hdr.dxfer_direction = SG_DXFER_FROM_DEV;
io_hdr.sbp = sense;
io_hdr.mx_sb_len = sizeof(sense);
io_hdr.timeout = 5000;
rv = ioctl(fd, SG_IO, &io_hdr);
if (rv)
return rv;
rsp_len = rsp_buf[3];
if (!rsp_len || buf_len < rsp_len)
return -1;
memcpy(buf, &rsp_buf[4], rsp_len);
return 0;
}
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