sc_inquiry.c

对SCSI设备 直接存取的通用库

/*
  sc_inquiry -- inquiry
  Copyright (C) 1996 Dieter Baron and Armin Obersteiner

  This file is part of libscsi, a library for direct scsi device access
  The authors can be contacted at
	<[e-mail]>
	<[e-mail]>

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include <scsi/all.h>



int
sc_inquiry(SCSI *fd, struct sc_inquiry *page)
{
    static unsigned char cmd[6] = { 0x12, 0x00, 0x00, 0x00, 255, 0x00 };
    u_char b[256];
    char i;
    int len;
    int result;

    if ((result=sc_send(fd, SC_READ, 6, cmd, 255, b)) < 0)
	return result;

    memcpy(page, b, 4);
    *(((char *)page)+4) = b[7];

    for (i=7; i>=0 && b[i+8]==' '; --i)
	;
    page->vendor = (char *)malloc(i+2);
    strncpy(page->vendor, b+8, i+1);
    page->vendor[i+1] = '\0';
    
    for (i=15; i>=0 && b[i+16]==' '; --i)
	;
    page->product = (char *)malloc(i+2);
    strncpy(page->product, b+16, i+1);
    page->product[i+1] = '\0';

    for (i=3; i>=0 && b[i+32]==' '; --i)
	;
    page->revision = (char *)malloc(i+2);
    strncpy(page->revision, b+32, i+1);
    page->revision[i+1] = '\0';

    page->vlen1 = page->vlen2 = 0;
    len = b[4] - 35;

    if (len > 60) {
	page->vlen2 = len-60;
	page->vspec2 = (u_char *)malloc(len-60);
	memcpy(page->vspec2, b+96, len-60);
    }
    if (len > 20)
	len = 20;
    if (len > 0) {
	page->vlen1 = len;
	page->vspec1 = (u_char *)malloc(len);
	memcpy(page->vspec1, b+36, len);
    }

    return 0;
}