zip_get_lock.c

对SCSI设备 直接存取的通用库

/*
  zip_get_lock -- get locking state of disk (for Iomega Zip)
  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/zip.h>



int
sc_zip_get_lock(SCSI *fd, struct sc_zip_lock *lock)
{
    static unsigned char cmd[6] = { 0x06, 0x00, 0x02, 0x00, 0x016, 0x00 };
    static char b[22];
    int result;

    if ((result=sc_send(fd, SC_READ, 6, cmd, 22, b)) < 0)
	return result;

    lock->state = b[21];
    lock->len = 0;

    return 0;
}