111 lines
2.7 KiB
C
111 lines
2.7 KiB
C
/*
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$Id: _cdio_generic.c,v 1.1 2003/03/29 17:32:00 rocky Exp $
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Copyright (C) 2001 Herbert Valerio Riedel <hvr@gnu.org>
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Copyright (C) 2002,2003 Rocky Bernstein <rocky@panix.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/* This file contains Linux-specific code and implements low-level
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control of the CD drive.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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static const char _rcsid[] = "$Id: _cdio_generic.c,v 1.1 2003/03/29 17:32:00 rocky Exp $";
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#include "cdio_assert.h"
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#include "cdio_private.h"
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#include "sector.h"
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#include "util.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <linux/cdrom.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <sys/ioctl.h>
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/*!
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Release and free resources associated with cd.
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*/
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void
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cdio_generic_free (void *user_data)
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{
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generic_img_private_t *_obj = user_data;
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if (NULL == _obj) return;
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free (_obj->source_name);
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if (_obj->fd >= 0)
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close (_obj->fd);
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free (_obj);
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}
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/*!
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Reads into buf the next size bytes.
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Returns -1 on error.
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Is in fact libc's read().
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*/
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off_t
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cdio_generic_lseek (void *user_data, off_t offset, int whence)
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{
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generic_img_private_t *_obj = user_data;
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return lseek(_obj->fd, offset, whence);
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}
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/*!
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Reads into buf the next size bytes.
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Returns -1 on error.
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Is in fact libc's read().
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*/
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ssize_t
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cdio_generic_read (void *user_data, void *buf, size_t size)
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{
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generic_img_private_t *_obj = user_data;
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return read(_obj->fd, buf, size);
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}
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int
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cdio_generic_read_mode2_sectors (CdIo *obj, void *buf, lsn_t lsn,
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bool mode2raw, unsigned num_sectors)
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{
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char *_buf = buf;
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const int blocksize = mode2raw ? M2RAW_SECTOR_SIZE : M2F1_SECTOR_SIZE;
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int n, rc;
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cdio_assert (obj != NULL);
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cdio_assert (buf != NULL);
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cdio_assert (obj->op.read_mode2_sector != NULL);
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for (n = 0; n < num_sectors; n++)
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if ((rc = cdio_read_mode2_sector (obj, &_buf[n * blocksize],
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lsn + n, mode2raw)))
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return rc;
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return 0;
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}
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