InfoMagic Source Code 1993 July/THE_SOURCE_CODE_CD_ROM.iso/bsd_srcs/usr.sbin/flcopy/flcopy.c

C/C++ Source or Header | 1991-04-20 | 4.8 KB | 202 lines

/*
 * Copyright (c) 1989 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    This product includes software developed by the University of
 *    California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1989 The Regents of the University of California.\n\
 All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)flcopy.c    5.4 (Berkeley) 1/20/91";
#endif /* not lint */

#include <sys/file.h>
#include <stdio.h>
#include "pathnames.h"

int    floppydes;
char    *flopname = _PATH_FLOPPY;
long    dsize = 77 * 26 * 128;
int    hflag;
int    rflag;

main(argc, argv)
    register char **argv;
{
    extern char *optarg;
    extern int optind;
    static char buff[512];
    register long count;
    register startad = -26 * 128;
    register int n, file;
    register char *cp;
    int ch;

    while ((ch = getopt(argc, argv, "f:hrt:")) != EOF)
        switch(ch) {
        case 'f':
            flopname = optarg;
            break;
        case 'h':
            hflag = 1;
            printf("Halftime!\n");
            if ((file = open("floppy", 0)) < 0) {
                printf("can't open \"floppy\"\n");
                exit(1);
            }
            break;
        case 'r':
            rflag = 1;
            break;
        case 't':
            dsize = atoi(optarg);
            if (dsize <= 0 || dsize > 77) {
                (void)fprintf(stderr,
                    "flcopy: bad number of tracks (0 - 77).\n");
                exit(2);
            }
            dsize *= 26 * 128;
            break;
        case '?':
        default:
            usage();
        }
    argc -= optind;
    argv += optind;

    if (!hflag) {
        file = open("floppy", O_RDWR|O_CREAT|O_TRUNC, 0666);
        if (file < 0) {
            printf("can't open \"floppy\"\n");
            exit(1);
        }
        for (count = dsize; count > 0 ; count -= 512) {
            n = count > 512 ? 512 : count;
            lread(startad, n, buff);
            write(file, buff, n);
            startad += 512;
        }
    }
    if (rflag)
        exit(0);
    printf("Change Floppy, Hit return when done.\n");
    gets(buff);
    lseek(file, 0, 0);
    count = dsize;
    startad = -26 * 128;
    for ( ; count > 0 ; count -= 512) {
        n = count > 512 ? 512 : count;
        read(file, buff, n);
        lwrite(startad, n, buff);
        startad += 512;
    }
    exit(0);
}

rt_init()
{
    static initized = 0;
    int mode = 2;

    if (initized)
        return;
    if (rflag)
        mode = 0;
    initized = 1;
    if ((floppydes = open(flopname, mode)) < 0) {
        printf("Floppy open failed\n");
        exit(1);
    }
}

/*
 * Logical to physical adress translation
 */
long
trans(logical)
    register int logical;
{
    register int sector, bytes, track;

    logical += 26 * 128;
    bytes = (logical & 127);
    logical >>= 7;
    sector = logical % 26;
    if (sector >= 13)
        sector = sector*2 +1;
    else
        sector *= 2;
    sector += 26 + ((track = (logical / 26)) - 1) * 6;
    sector %= 26;
    return ((((track *26) + sector) << 7) + bytes);
}

lread(startad, count, obuff)
    register startad, count;
    register char *obuff;
{
    long trans();
    extern floppydes;

    rt_init();
    while ((count -= 128) >= 0) {
        lseek(floppydes, trans(startad), 0);
        read(floppydes, obuff, 128);
        obuff += 128;
        startad += 128;
    }
}

lwrite(startad, count, obuff)
    register startad, count;
    register char *obuff;
{
    long trans();
    extern floppydes;

    rt_init();
    while ((count -= 128) >= 0) {
        lseek(floppydes, trans(startad), 0);
        write(floppydes, obuff, 128);
        obuff += 128;
        startad += 128;
    }
}

usage()
{
    (void)fprintf(stderr, "usage: flcopy [-hr] [-f file] [-t ntracks]\n");
    exit(1);
}