cmd/cdrw/mmc.c

	mmc.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#include <sys/types.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#include "transport.h"
#include "mmc.h"
#include "util.h"
#include "main.h"

int
test_unit_ready(int fd)
{
    struct uscsi_cmd *scmd;

    scmd = get_uscsi_cmd();
    scmd->uscsi_flags = USCSI_SILENT;
    scmd->uscsi_timeout = DEFAULT_SCSI_TIMEOUT;
    /* give length of cdb structure */
    scmd->uscsi_cdblen = 6;
    if ((uscsi_error = uscsi(fd, scmd)) < 0)
        return (0);
    return (1);
}

int
inquiry(int fd, uchar_t *inq)
{
    struct uscsi_cmd *scmd;

    scmd = get_uscsi_cmd();
    scmd->uscsi_flags = USCSI_READ|USCSI_SILENT;
    scmd->uscsi_timeout = DEFAULT_SCSI_TIMEOUT;
    scmd->uscsi_cdb[0] = INQUIRY_CMD;
    scmd->uscsi_cdb[4] = INQUIRY_DATA_LENGTH;
    scmd->uscsi_cdblen = 6;
    scmd->uscsi_bufaddr = (char *)inq;
    scmd->uscsi_buflen = INQUIRY_DATA_LENGTH;
    if ((uscsi_error = uscsi(fd, scmd)) < 0)
        return (0);
    return (1);
}

int
read_capacity(int fd, uchar_t *capbuf)
{
    struct uscsi_cmd *scmd;

    scmd = get_uscsi_cmd();
    scmd->uscsi_flags = USCSI_READ|USCSI_SILENT;
    scmd->uscsi_timeout = DEFAULT_SCSI_TIMEOUT;
    scmd->uscsi_cdb[0] = READ_CAP_CMD;
    scmd->uscsi_cdblen = 10;
    scmd->uscsi_bufaddr = (char *)capbuf;
    scmd->uscsi_buflen = 8;
    if ((uscsi_error = uscsi(fd, scmd)) < 0)
        return (0);
    return (1);
}

int
mode_sense(int fd, uchar_t pc, int dbd, int page_len, uchar_t *buffer)
{
    struct uscsi_cmd *scmd;

    scmd = get_uscsi_cmd();
    scmd->uscsi_flags = USCSI_READ|USCSI_SILENT;
    scmd->uscsi_buflen = page_len;
    scmd->uscsi_bufaddr = (char *)buffer;
    scmd->uscsi_timeout = DEFAULT_SCSI_TIMEOUT;
    scmd->uscsi_cdblen = 0xa;
    scmd->uscsi_cdb[0] = MODE_SENSE_10_CMD;
    if (dbd) {
        /* don't return any block descriptors */
        scmd->uscsi_cdb[1] = 0x8;
    }
    /* the page code we want */
    scmd->uscsi_cdb[2] = pc;
    /* allocation length */
    scmd->uscsi_cdb[7] = (page_len >> 8) & 0xff;
    scmd->uscsi_cdb[8] = page_len & 0xff;

    if ((uscsi_error = uscsi(fd, scmd)) < 0)
        return (0);
    return (1);
}

int
mode_select(int fd, int page_len, uchar_t *buffer)
{
    struct uscsi_cmd *scmd;

    scmd = get_uscsi_cmd();
    scmd->uscsi_flags = USCSI_WRITE|USCSI_SILENT;
    scmd->uscsi_buflen = page_len;
    scmd->uscsi_bufaddr = (char *)buffer;
    scmd->uscsi_timeout = DEFAULT_SCSI_TIMEOUT;
    scmd->uscsi_cdblen = 0xa;

    /* mode select (10) command */
    scmd->uscsi_cdb[0] = MODE_SELECT_10_CMD;
    scmd->uscsi_cdb[1] = 0x10;

    /* parameter list length */
    scmd->uscsi_cdb[7] = (page_len >> 8) & 0xff;
    scmd->uscsi_cdb[8] = page_len & 0xff;

    if ((uscsi_error = uscsi(fd, scmd)) < 0)
        return (0);
    return (1);
}

int
read_track_info(int fd, int trackno, uchar_t *ti)
{
    struct uscsi_cmd *scmd;

    scmd = get_uscsi_cmd();
    scmd->uscsi_flags = USCSI_READ|USCSI_SILENT;
    scmd->uscsi_timeout = DEFAULT_SCSI_TIMEOUT;
    scmd->uscsi_cdb[0] = READ_TRACK_CMD;

    /* tell device we are giving it a track number */
    scmd->uscsi_cdb[1] = 1;

    /* track number to read */
    if (trackno == -1)
        if (device_type == CD_RW) {
            ((uchar_t *)scmd->uscsi_cdb)[5] = 0xff;
        } else {
            /* only 1 track is allowed on DVD media */
            scmd->uscsi_cdb[1] = 0;
            ((uchar_t *)scmd->uscsi_cdb)[5] = 0;
        }
    else
        scmd->uscsi_cdb[5] = (uchar_t)trackno;

    scmd->uscsi_cdb[8] = TRACK_INFO_SIZE;
    scmd->uscsi_cdblen = 10;
    scmd->uscsi_bufaddr = (char *)ti;
    scmd->uscsi_buflen = TRACK_INFO_SIZE;
    if ((uscsi_error = uscsi(fd, scmd)) < 0)
        return (0);
    return (1);
}

int
read_toc(int fd, int format, int trackno, int buflen, uchar_t *buf)
{
    struct uscsi_cmd *scmd;

    scmd = get_uscsi_cmd();
    scmd->uscsi_flags = USCSI_READ|USCSI_SILENT;
    scmd->uscsi_timeout = DEFAULT_SCSI_TIMEOUT;
    scmd->uscsi_cdb[0] = READ_TOC_CMD;
    scmd->uscsi_cdb[2] = format & 0xf;
    scmd->uscsi_cdb[6] = trackno;
    scmd->uscsi_cdb[8] = buflen & 0xff;
    scmd->uscsi_cdb[7] = (buflen >> 8) & 0xff;
    scmd->uscsi_cdblen = 10;
    scmd->uscsi_bufaddr = (char *)buf;
    scmd->uscsi_buflen = buflen;
    if ((uscsi_error = uscsi(fd, scmd)) < 0)
        return (0);

    /* Fix for old SONY drives */
    if ((format == 0) && (buflen == 4) && (buf[0] == 0) && (buf[1] == 2)) {
        uint16_t toc_size;

        toc_size = (((uint16_t)(buf[3] + 1)) * 8) + 2;
        load_scsi16(buf, toc_size);
    }
    return (1);
}

int
read_header(int fd, uint32_t lba, uchar_t *buf)
{
    struct uscsi_cmd *scmd;

    scmd = get_uscsi_cmd();
    scmd->uscsi_flags = USCSI_READ|USCSI_SILENT;
    scmd->uscsi_timeout = DEFAULT_SCSI_TIMEOUT;
    scmd->uscsi_cdb[0] = READ_HDR_CMD;

    /* Logical block address */
    load_scsi32(&scmd->uscsi_cdb[2], lba);

    /* allocation length */
    scmd->uscsi_cdb[8] = 8;
    scmd->uscsi_cdblen = 10;
    scmd->uscsi_bufaddr = (char *)buf;
    scmd->uscsi_buflen = 8;
    if ((uscsi_error = uscsi(fd, scmd)) < 0)
        return (0);
    return (1);
}

int
read_disc_info(int fd, uchar_t *di)
{
    struct uscsi_cmd *scmd;

    scmd = get_uscsi_cmd();
    scmd->uscsi_flags = USCSI_READ|USCSI_SILENT;
    scmd->uscsi_timeout = DEFAULT_SCSI_TIMEOUT;
    scmd->uscsi_cdb[0] = READ_INFO_CMD;
    scmd->uscsi_cdb[8] = DISC_INFO_BLOCK_SIZE;
    scmd->uscsi_cdblen = 10;
    scmd->uscsi_bufaddr = (char *)di;
    scmd->uscsi_buflen = DISC_INFO_BLOCK_SIZE;
    if ((uscsi_error = uscsi(fd, scmd)) < 0)
        return (0);
    return (1);
}

int
get_configuration(int fd, uint16_t feature, int bufsize, uchar_t *buf)
{
    struct uscsi_cmd *scmd;

    scmd = get_uscsi_cmd();
    scmd->uscsi_flags = USCSI_READ|USCSI_SILENT;
    scmd->uscsi_timeout = DEFAULT_SCSI_TIMEOUT;
    scmd->uscsi_cdb[0] = GET_CONFIG_CMD;
    if (feature == 0)
        scmd->uscsi_cdb[1] = 0x2;
    else
        scmd->uscsi_cdb[1] = 0x1;
    scmd->uscsi_cdb[1] = 0x2;
    scmd->uscsi_cdb[2] = (feature >> 8) & 0xff;
    scmd->uscsi_cdb[3] = feature & 0xff;
    scmd->uscsi_cdb[7] = (bufsize >> 8) & 0xff;
    scmd->uscsi_cdb[8] = bufsize & 0xff;
    scmd->uscsi_cdblen = 10;
    scmd->uscsi_bufaddr = (char *)buf;
    scmd->uscsi_buflen = bufsize;
    if ((uscsi_error = uscsi(fd, scmd)) < 0)
        return (0);
    return (1);
}

int
read10(int fd, uint32_t start_blk, uint16_t nblk, uchar_t *buf,
    uint32_t bufsize)
{
    struct uscsi_cmd *scmd;

    scmd = get_uscsi_cmd();
    scmd->uscsi_flags = USCSI_READ|USCSI_SILENT;
    scmd->uscsi_timeout = DEFAULT_SCSI_TIMEOUT;
    scmd->uscsi_cdb[0] = READ_10_CMD;
    load_scsi32(&scmd->uscsi_cdb[2], start_blk);
    scmd->uscsi_cdb[8] = nblk & 0xff;
    scmd->uscsi_cdb[7] = (nblk >> 8) & 0xff;
    scmd->uscsi_cdblen = 10;
    scmd->uscsi_bufaddr = (char *)buf;
    scmd->uscsi_buflen = bufsize;
    if ((uscsi_error = uscsi(fd, scmd)) < 0)
        return (0);
    return (1);
}

int
write10(int fd, uint32_t start_blk, uint16_t nblk, uchar_t *buf,
    uint32_t bufsize)
{
    struct uscsi_cmd *scmd;

    scmd = get_uscsi_cmd();
    scmd->uscsi_flags = USCSI_WRITE|USCSI_SILENT;
    /*
     * Some DVD drives take longer to write than
     * the standard time, since they tend to generate
     * the media TOC on the fly when the cache is full
     */
    scmd->uscsi_timeout = DEFAULT_SCSI_TIMEOUT * 3;
    scmd->uscsi_cdb[0] = WRITE_10_CMD;
    load_scsi32(&scmd->uscsi_cdb[2], start_blk);
    scmd->uscsi_cdb[8] = nblk & 0xff;
    scmd->uscsi_cdb[7] = (nblk >> 8) & 0xff;
    scmd->uscsi_cdblen = 10;
    scmd->uscsi_bufaddr = (char *)buf;
    scmd->uscsi_buflen = bufsize;
    if ((uscsi_error = uscsi(fd, scmd)) < 0)
        return (0);
    return (1);
}

int
close_track(int fd, int trackno, int close_session, int immediate)
{
    struct uscsi_cmd *scmd;

    scmd = get_uscsi_cmd();
    scmd->uscsi_flags = USCSI_SILENT;
    scmd->uscsi_cdb[0] = CLOSE_TRACK_CMD;
    if (immediate) {
        scmd->uscsi_timeout = DEFAULT_SCSI_TIMEOUT;
        scmd->uscsi_cdb[1] = 1;
    } else {
        scmd->uscsi_timeout = 240;
    }
    if ((close_session) || (device_type == DVD_PLUS) ||
        (device_type == DVD_PLUS_W)) {
        /* close the session */
        scmd->uscsi_cdb[2] = 2;

    } else {
        /* Close the track but leave session open */
        scmd->uscsi_cdb[2] = 1;
        scmd->uscsi_cdb[5] = trackno & 0xff;
    }

    /*
     * DVD+R media are already formatted, we are using
     * a special case to notify that drive to close
     * track/session and null-fill the remaining space.
     */
    if (device_type == DVD_PLUS) {
        scmd->uscsi_cdb[5] = 1; /* only 1 track */

        if (close_session) {
            scmd->uscsi_cdb[2] = 6; /* session */
        } else {
            scmd->uscsi_cdb[2] = 1; /* track */
        }
    }

    scmd->uscsi_cdblen = 10;
    if ((uscsi_error = uscsi(fd, scmd)) < 0)
        return (0);
    return (1);
}

int
blank_disc(int fd, int type, int immediate)
{
    struct uscsi_cmd *scmd;

    scmd = get_uscsi_cmd();
    scmd->uscsi_flags = USCSI_SILENT;

    if (immediate) {
        scmd->uscsi_timeout = DEFAULT_SCSI_TIMEOUT;
        scmd->uscsi_cdb[1] = 0x10;
    } else {
        scmd->uscsi_timeout = 0x12c0;
    }
    ((uchar_t *)scmd->uscsi_cdb)[0] = BLANK_CMD;

    /* tell it to blank the last session or all of the disk */
    scmd->uscsi_cdb[1] |= type & 0x07;
    scmd->uscsi_cdblen = 12;

    if ((uscsi_error = uscsi(fd, scmd)) < 0)
        return (0);
    return (1);
}

int
read_cd(int fd, uint32_t start_blk, uint16_t nblk, uchar_t sector_type,
    uchar_t *buf, uint32_t bufsize)
{
    struct uscsi_cmd *scmd;

    scmd = get_uscsi_cmd();
    scmd->uscsi_flags = USCSI_READ|USCSI_SILENT;
    scmd->uscsi_timeout = DEFAULT_SCSI_TIMEOUT;
    ((uchar_t *)scmd->uscsi_cdb)[0] = READ_CD_CMD;
    scmd->uscsi_cdb[1] = (sector_type & 0x7) << 2;
    scmd->uscsi_cdb[5] = start_blk & 0xff;
    scmd->uscsi_cdb[4] = (start_blk >> 8) & 0xff;
    scmd->uscsi_cdb[3] = (start_blk >> 16) & 0xff;
    scmd->uscsi_cdb[2] = (start_blk >> 24) & 0xff;
    scmd->uscsi_cdb[8] = nblk & 0xff;
    scmd->uscsi_cdb[7] = (nblk >> 8) & 0xff;
    scmd->uscsi_cdb[9] = 0x10;
    scmd->uscsi_cdblen = 12;
    scmd->uscsi_bufaddr = (char *)buf;
    scmd->uscsi_buflen = bufsize;
    if ((uscsi_error = uscsi(fd, scmd)) < 0)
        return (0);
    return (1);
}

int
load_unload(int fd, int load)
{
    struct uscsi_cmd *scmd;

    scmd = get_uscsi_cmd();
    scmd->uscsi_flags = USCSI_SILENT;
    scmd->uscsi_timeout = DEFAULT_SCSI_TIMEOUT;
    scmd->uscsi_cdb[0] = START_STOP_CMD;
    if (load == 0) {
        /* unload medium */
        scmd->uscsi_cdb[4] = 2;
    } else {
        /* load medium */
        scmd->uscsi_cdb[4] = 3;
    }
    scmd->uscsi_cdblen = 6;

    if ((uscsi_error = uscsi(fd, scmd)) < 0)
        return (0);
    return (1);
}

int
prevent_allow_mr(int fd, int op)
{
    struct uscsi_cmd *scmd;

    scmd = get_uscsi_cmd();
    scmd->uscsi_flags = USCSI_SILENT;
    scmd->uscsi_timeout = DEFAULT_SCSI_TIMEOUT;
    scmd->uscsi_cdb[0] = PREVENT_ALLOW_CMD;
    if (!op) {  /* prevent */
        scmd->uscsi_cdb[4] = 1;
    }
    scmd->uscsi_cdblen = 6;
    if ((uscsi_error = uscsi(fd, scmd)) < 0)
        return (0);
    return (1);
}

int
set_cd_speed(int fd, uint16_t read_speed, uint16_t write_speed)
{
    struct uscsi_cmd *scmd;

    scmd = get_uscsi_cmd();
    scmd->uscsi_flags = USCSI_SILENT;
    scmd->uscsi_timeout = DEFAULT_SCSI_TIMEOUT;
    scmd->uscsi_cdblen = 0xc;
    ((uchar_t *)scmd->uscsi_cdb)[0] = SET_CD_SPEED;
    scmd->uscsi_cdb[2] = (read_speed >> 8) & 0xff;
    scmd->uscsi_cdb[3] = read_speed & 0xff;
    scmd->uscsi_cdb[4] = (write_speed >> 8) & 0xff;
    scmd->uscsi_cdb[5] = write_speed & 0xff;

    if ((uscsi_error = uscsi(fd, scmd)) < 0)
        return (0);
    return (1);
}

int
get_performance(int fd, int get_write_performance, uchar_t *perf)
{
    struct uscsi_cmd *scmd;

    scmd = get_uscsi_cmd();
    scmd->uscsi_flags = USCSI_READ|USCSI_SILENT;
    scmd->uscsi_buflen = GET_PERF_DATA_LEN;
    scmd->uscsi_bufaddr = (char *)perf;
    scmd->uscsi_timeout = DEFAULT_SCSI_TIMEOUT;
    scmd->uscsi_cdblen = 0xc;
    ((uchar_t *)scmd->uscsi_cdb)[0] = GET_PERFORMANCE_CMD;
    scmd->uscsi_cdb[1] = 0x10;
    if (get_write_performance)
        scmd->uscsi_cdb[1] |= 4;
    scmd->uscsi_cdb[9] = 2;
    if ((uscsi_error = uscsi(fd, scmd)) < 0)
        return (0);
    return (1);
}

int
set_streaming(int fd, uchar_t *buf)
{
    struct uscsi_cmd *scmd;

    scmd = get_uscsi_cmd();
    scmd->uscsi_flags = USCSI_WRITE|USCSI_SILENT;
    scmd->uscsi_buflen = SET_STREAM_DATA_LEN;
    scmd->uscsi_bufaddr = (char *)buf;
    scmd->uscsi_timeout = DEFAULT_SCSI_TIMEOUT;
    scmd->uscsi_cdblen = 0xc;
    ((uchar_t *)scmd->uscsi_cdb)[0] = STREAM_CMD;
    scmd->uscsi_cdb[10] = SET_STREAM_DATA_LEN;
    if ((uscsi_error = uscsi(fd, scmd)) < 0)
        return (0);
    return (1);
}

int
rezero_unit(int fd)
{
    struct uscsi_cmd *scmd;

    scmd = get_uscsi_cmd();
    scmd->uscsi_flags = USCSI_SILENT;
    scmd->uscsi_timeout = DEFAULT_SCSI_TIMEOUT;
    scmd->uscsi_cdblen = 0x6;
    scmd->uscsi_cdb[0] = REZERO_UNIT_CMD;
    if ((uscsi_error = uscsi(fd, scmd)) < 0)
        return (0);
    return (1);
}

int
start_stop(int fd, int start)
{
    struct uscsi_cmd *scmd;

    scmd = get_uscsi_cmd();
    scmd->uscsi_flags = USCSI_SILENT;
    scmd->uscsi_timeout = DEFAULT_SCSI_TIMEOUT;
    scmd->uscsi_cdblen = 0x6;
    scmd->uscsi_cdb[0] = START_STOP_CMD;
    if (start) {
        scmd->uscsi_cdb[4] = 1;
    }
    if ((uscsi_error = uscsi(fd, scmd)) < 0)
        return (0);
    return (1);
}

int
flush_cache(int fd)
{
    struct uscsi_cmd *scmd;

    scmd = get_uscsi_cmd();
    scmd->uscsi_flags = USCSI_SILENT;
    scmd->uscsi_timeout = DEFAULT_SCSI_TIMEOUT;
    scmd->uscsi_cdblen = 10;
    scmd->uscsi_cdb[0] = SYNC_CACHE_CMD;
    if (device_type != CD_RW) {
        scmd->uscsi_cdb[1] = 0x2; /* Immediate */
    }

    if ((uscsi_error = uscsi(fd, scmd)) < 0)
        return (0);
    return (1);
}

/*
 * used for DVD- to reserve the size we want to write.
 * This is used by the drive to generate a TOC.
 */
int
set_reservation(int fd, ulong_t size)
{
    struct uscsi_cmd *scmd;

    scmd = get_uscsi_cmd();
    scmd->uscsi_flags = USCSI_READ|USCSI_SILENT;
    scmd->uscsi_timeout = DEFAULT_SCSI_TIMEOUT;
    scmd->uscsi_cdb[0] = SET_RESERVATION_CMD;
    scmd->uscsi_cdblen = 10;
    scmd->uscsi_cdb[5] = (uchar_t)(size >> 24);
    scmd->uscsi_cdb[6] = (uchar_t)(size >> 16);
    scmd->uscsi_cdb[7] = (uchar_t)(size >> 8);
    scmd->uscsi_cdb[8] = (uchar_t)size;
    if ((uscsi_error = uscsi(fd, scmd)) < 0)
        return (0);
    return (1);
}

/*
 * Used for DVD+RW media to prepare the disk to write.
 * It will also be used for packet mode writing when
 * it becomes supported.
 */
int
format_media(int fd)
{
    struct uscsi_cmd *scmd;
    uchar_t buf[20];

    (void) memset(buf, 0, 20);
    scmd = get_uscsi_cmd();
    scmd->uscsi_flags = USCSI_READ|USCSI_SILENT;
    scmd->uscsi_timeout = DEFAULT_SCSI_TIMEOUT;

    scmd->uscsi_cdblen = 12;
    scmd->uscsi_cdb[0] = READ_FORMAT_CAP_CMD;
    scmd->uscsi_cdb[8] = 0x14; /* buffer length */
    scmd->uscsi_buflen = 20;
    scmd->uscsi_bufaddr = (char *)buf;

    if ((uscsi_error = uscsi(fd, scmd)) < 0)
        return (0);

    /* RE-use cap structure */

    scmd->uscsi_flags = USCSI_WRITE|USCSI_SILENT;
    scmd->uscsi_timeout = DEFAULT_SCSI_TIMEOUT;
    scmd->uscsi_cdblen = 6;
    scmd->uscsi_cdb[0] = FORMAT_UNIT_CMD;
    /* full format */
    scmd->uscsi_cdb[1] = 0x11;
    scmd->uscsi_buflen = 12;
    buf[1] = 0x82; /* immediate and FOV */
    buf[3] = 8; /* descriptor length */
    buf[8] = 0x98;  /* type = 26 DVD+RW format */
    buf[10] = 0;

    if ((uscsi_error = uscsi(fd, scmd)) < 0)
        return (0);
    return (1);
}


/*
 * Prefered method of reading the media size. This is
 * the only supported method on several newer drives.
 */
uint32_t
read_format_capacity(int fd, uint_t *bsize)
{
    struct uscsi_cmd *scmd;
    uint32_t filesize;
    char buf[20];

    scmd = get_uscsi_cmd();
    scmd->uscsi_flags = USCSI_READ|USCSI_SILENT;
    scmd->uscsi_timeout = DEFAULT_SCSI_TIMEOUT;
    scmd->uscsi_cdblen = 12;
    scmd->uscsi_cdb[0] = READ_FORMAT_CAP_CMD;
    scmd->uscsi_cdb[8] = 0x14;
    scmd->uscsi_buflen = 20;
    scmd->uscsi_bufaddr = buf;

    if ((uscsi_error = uscsi(fd, scmd)) < 0)
        return (0);

    filesize =  (uint32_t)(((uchar_t)buf[4] << 24) +
        ((uchar_t)buf[5] << 16) + ((uchar_t)buf[6] << 8) + (uchar_t)buf[7]);

    *bsize = (uint16_t)(((uchar_t)buf[10] << 8) + (uchar_t)buf[11]);

    return (filesize);
}