scsi.h.in

对SCSI设备 直接存取的通用库

#ifndef HAD_SCSI_H
#define HAD_SCSI_H

/*
  scsi.h -- general include file
  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 <sys/types.h>

#define SC_BIGENDIAN	@WORDS_BIGENDIAN@

#define SC_READ		1
#define SC_WRITE	2

#if SC_BIGENDIAN
#define sc_store_l(s, l)	\
	(*((u_long *)(s)) = l)
#define sc_store_s(s, l)	\
	(*((u_short *)(s)) = l)
#define sc_fetch_l(l, s)	\
	(l = *((u_long *)(s)))
#define sc_fetch_s(l, s)	\
	(l = *((u_short *)(s)))
#else
#define sc_store_l(s, l)	\
	((s)[0]=(((l)>>24)&255), (s)[1]=(((l)>>16)&255), \
	 (s)[2]=(((l)>>8)&255), (s)[3]=((l)&255))
#define sc_store_s(s, l)	\
	((s)[0]=(((l)>>8)&255), (s)[1]=((l)&255))
#define sc_fetch_l(l, s)	\
	((l)=((s)[0]<<24) | ((s)[1]<<16) | ((s)[2]<<8) | ((s)[3]))
#define sc_fetch_s(l, s)	\
	((l)=((s)[0]<<8) | ((s)[1]))
#endif

struct sc_sense_data {
#if SC_BIGENDIAN
    u_char vaild:1, ecode:7;
#else
    u_char ecode:7, vaild:1;
#endif
    u_char segnr;
#if SC_BIGENDIAN
    u_char fmark:1, eom:1, ili:1, :1, skey:4;
#else
    u_char skey:4, :1, ili:1, eom:1, fmark:1;
#endif
    u_char info[4];
    u_char length;
    u_char cspec[4];
    u_char asc;
    u_char asq;
    u_char fruc;
    u_char kspec[4];
    u_char additional[1];
};

struct sc_sense {
    int status;
    int len;
    struct sc_sense_data data;
};

#include <scsi/os.h>

SCSI *sc_open(char *device);
int sc_close(SCSI *s);

int sc_send(SCSI *s, int direction, int cmdlen, char *cmd,
	    int datalen, char *data);

int sc_set_timeout(SCSI *s, u_long timeout);


/*int sc_fstatus(SCSI *s, FILE *f, char *prg, char *msg, int vlevel);*/
void sc_clearerr(SCSI *fd);


#endif /* scsi.h */