/*
* Copyright (C) 2007-2008 Intel Corporation
*
- * Retrieve drive serial numbers for scsi disks
+ * 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,
int scsi_get_serial(int fd, void *buf, size_t buf_len)
{
- unsigned char inq_cmd[] = {INQUIRY, 1, 0x80, 0, buf_len, 0};
+ 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 = buf;
- io_hdr.dxfer_len = buf_len;
+ 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;
- return ioctl(fd, SG_IO, &io_hdr);
+ rv = ioctl(fd, SG_IO, &io_hdr);
+
+ if (rv)
+ return rv;
+
+ if ((io_hdr.info & SG_INFO_OK_MASK) != SG_INFO_OK)
+ return -1;
+
+ rsp_len = rsp_buf[3];
+
+ if (!rsp_len || buf_len < rsp_len)
+ return -1;
+
+ memcpy(buf, &rsp_buf[4], rsp_len);
+
+ return 0;
}