da_start_stop_unit.c

来自「对SCSI设备 直接存取的通用库」· C语言 代码 · 共 40 行

/*
  da_start_stop_unit -- start/stop unit (also used for eject)
  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 <stddef.h>
#include <scsi/da.h>



int
sc_da_start_stop_unit(SCSI *fd, int imm, int loej, int start)
{
    static unsigned char cmd[6] = { 0x1b };

    cmd[1] = (imm ? 1 : 0);
    cmd[4] = (loej ? 0x2 : 0) | (start ? 0x1 : 0);

    return sc_send(fd, 0, 6, cmd, 0, NULL);
}