tape-ops.h

开源备份软件源码 AMANDA, the Advanced Maryland Automatic Network Disk Archiver, is a backup system that a

/*
 * Copyright (c) 2005 Zmanda, Inc.  All Rights Reserved.
 * 
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License version 2.1 as 
 * published by the Free Software Foundation.
 * 
 * This library 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 Lesser General Public
 * License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library; if not, write to the Free Software Foundation,
 * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA.
 * 
 * Contact information: Zmanda Inc., 505 N Mathlida Ave, Suite 120
 * Sunnyvale, CA 94085, USA, or: http://www.zmanda.com
 */

#ifndef TAPE_OPS_H

#include <glib.h>
#include "tape-device.h"
#include "amanda.h"

#ifdef HAVE_SYS_TAPE_H
# include <sys/tape.h>
#endif
#ifdef HAVE_SYS_MTIO_H
# include <sys/mtio.h>
#endif

/* Return codes for tape_eod */
#define TAPE_OP_ERROR -1
#define TAPE_POSITION_UNKNOWN -2

/* Real Operations (always return FALSE if not implemented). These are
 * implemented in one of tape-{uware,aix,xenix,posix}.c, depending on
 * the platform. */
gboolean tape_rewind(int fd);
gboolean tape_fsf(int fd, guint count);
gboolean tape_bsf(int fd, guint count);
gboolean tape_fsr(int fd, guint count);
gboolean tape_bsr(int fd, guint count);
/* Returns tape position file number, or one of the return codes above. */
gint tape_eod(int fd);
gboolean tape_weof(int fd, guint8 count);
gboolean tape_setcompression(int fd, gboolean on);

typedef enum {
    TAPE_CHECK_SUCCESS,
    TAPE_CHECK_UNKNOWN,
    TAPE_CHECK_FAILURE
} TapeCheckResult;
TapeCheckResult tape_is_tape_device(int fd);
TapeCheckResult tape_is_ready(int fd);

/* Also implemented in above files. Sets properties on the device. */
void tape_device_discover_capabilities(TapeDevice * self);

#endif