/*      $OpenBSD: fdformat.c,v 1.25 2022/12/04 23:50:50 cheloha Exp $   */

/*
 * Copyright (C) 1992-1994 by Joerg Wunsch, Dresden
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``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 AUTHOR(S) 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.
 */

/*
 * FreeBSD:
 * format a floppy disk
 * 
 * Added FD_GTYPE ioctl, verifying, proportional indicators.
 * Serge Vakulenko, vak@zebub.msk.su
 * Sat Dec 18 17:45:47 MSK 1993
 *
 * Final adaptation, change format/verify logic, add separate
 * format gap/interleave values
 * Andrew A. Chernov, ache@astral.msk.su
 * Thu Jan 27 00:47:24 MSK 1994
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <limits.h>
#include <ctype.h>
#include <err.h>
#include <util.h>

#include <errno.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <machine/ioctl_fd.h>

extern const char *__progname;

static void
format_track(int fd, int cyl, int secs, int head, int rate, int gaplen,
    int secsize, int fill, int interleave)
{
        struct fd_formb f;
        int i,j;
        int il[FD_MAX_NSEC + 1];

        memset(il,0,sizeof il);
        for(j = 0, i = 1; i <= secs; i++) {
                while(il[(j%secs)+1])
                        j++;
                il[(j%secs)+1] = i;
                j += interleave;
        }

        f.format_version = FD_FORMAT_VERSION;
        f.head = head;
        f.cyl = cyl;
        f.transfer_rate = rate;

        f.fd_formb_secshift = secsize;
        f.fd_formb_nsecs = secs;
        f.fd_formb_gaplen = gaplen;
        f.fd_formb_fillbyte = fill;
        for(i = 0; i < secs; i++) {
                f.fd_formb_cylno(i) = cyl;
                f.fd_formb_headno(i) = head;
                f.fd_formb_secno(i) = il[i+1];
                f.fd_formb_secsize(i) = secsize;
        }
        if (ioctl(fd, FD_FORM, (caddr_t)&f) == -1)
                err(1, "FD_FORM");
}

static int
verify_track(int fd, int track, int tracksize)
{
        static char *buf = 0;
        static int bufsz = 0;
        int fdopts = -1, ofdopts, rv = 0;

        if (ioctl(fd, FD_GOPTS, &fdopts) == -1)
                warn("FD_GOPTS");
        else {
                ofdopts = fdopts;
                fdopts |= FDOPT_NORETRY;
                (void)ioctl(fd, FD_SOPTS, &fdopts);
        }
        
        if (bufsz < tracksize) {
                free(buf);
                bufsz = tracksize;
                buf = 0;
        }
        if (! buf)
                buf = malloc(bufsz);
        if (! buf) {
                fprintf (stderr, "\nfdformat: out of memory\n");
                exit (2);
        }
        if (lseek (fd, (off_t) track*tracksize, SEEK_SET) == -1)
                rv = -1;
        /* try twice reading it, without using the normal retrier */
        else if (read (fd, buf, tracksize) != tracksize
                 && read (fd, buf, tracksize) != tracksize)
                rv = -1;
        if (fdopts != -1)
                (void)ioctl(fd, FD_SOPTS, &ofdopts);
        return (rv);
}

static void
usage(void)
{
        printf("usage: %s [-nqv] [-c cyls] [-F fillbyte] [-g gap3len] "
            "[-h heads]\n"
            "   [-i intleave] [-r rate] [-S secshft] [-s secs]\n"
            "   [-t steps_per_track] device_name\n", __progname);
        exit(2);
}

static int
yes(void)
{
        char reply[256], *p;

        for (;;) {
                fflush(stdout);
                if (!fgets(reply, sizeof(reply), stdin))
                        return (0);
                for (p=reply; *p==' ' || *p=='\t'; ++p)
                        continue;
                if (*p=='y' || *p=='Y')
                        return (1);
                if (*p=='n' || *p=='N' || *p=='\n' || *p=='\r')
                        return (0);
                printf("Answer `yes' or `no': ");
        }
}

int
main(int argc, char *argv[])
{
        int cyls = -1, secs = -1, heads = -1, intleave = -1;
        int rate = -1, gaplen = -1, secsize = -1, steps = -1;
        int fill = 0xf6, quiet = 0, verify = 1, verify_only = 0;
        int fd, c, track, error, tracks_per_dot, bytes_per_track, errs;
        const char *errstr;
        char *devname;
        struct fd_type fdt;

        while((c = getopt(argc, argv, "c:s:h:r:g:S:F:t:i:qvn")) != -1)
                switch (c) {
                case 'c':       /* # of cyls */
                        cyls = strtonum(optarg, 1, INT_MAX, &errstr);
                        if (errstr)
                                errx(1, "-c %s: %s", optarg, errstr);
                        break;

                case 's':       /* # of secs per track */
                        secs = strtonum(optarg, 1, INT_MAX, &errstr);
                        if (errstr)
                                errx(1, "-s %s: %s", optarg, errstr);
                        break;

                case 'h':       /* # of heads */
                        heads = strtonum(optarg, 1, INT_MAX, &errstr);
                        if (errstr)
                                errx(1, "-h %s: %s", optarg, errstr);
                        break;

                case 'r':       /* transfer rate, kilobyte/sec */
                        rate = strtonum(optarg, 1, INT_MAX, &errstr);
                        if (errstr)
                                errx(1, "-r %s: %s", optarg, errstr);
                        break;

                case 'g':       /* length of GAP3 to format with */
                        gaplen = strtonum(optarg, 1, INT_MAX, &errstr);
                        if (errstr)
                                errx(1, "-g %s: %s", optarg, errstr);
                        break;

                case 'S':       /* sector size shift factor (1 << S)*128 */
                        secsize = strtonum(optarg, 0, INT_MAX, &errstr);
                        if (errstr)
                                errx(1, "-S %s: %s", optarg, errstr);
                        break;

                case 'F':       /* fill byte, C-like notation allowed */
                        fill = (int)strtol(optarg, NULL, 0);
                        break;

                case 't':       /* steps per track */
                        steps = strtonum(optarg, 1, INT_MAX, &errstr);
                        if (errstr)
                                errx(1, "-t %s: %s", optarg, errstr);
                        break;

                case 'i':       /* interleave factor */
                        intleave = strtonum(optarg, 1, INT_MAX, &errstr);
                        if (errstr)
                                errx(1, "-i %s: %s", optarg, errstr);
                        break;

                case 'q':
                        quiet = 1;
                        break;

                case 'n':
                        verify = 0;
                        break;

                case 'v':
                        verify = 1;
                        verify_only = 1;
                        break;

                default:
                        usage();
                }

        if (optind != argc - 1)
                usage();

        if ((fd = opendev(argv[optind], O_RDWR, OPENDEV_PART, &devname)) == -1)
                err(1, "%s", devname);

        if (ioctl(fd, FD_GTYPE, &fdt) == -1)
                errx(1, "not a floppy disk: %s", devname);

        switch (rate) {
        case -1:
                break;
        case 250:
                fdt.rate = FDC_250KBPS;
                break;
        case 300:
                fdt.rate = FDC_300KBPS;
                break;
        case 500:
                fdt.rate = FDC_500KBPS;
                break;
        default:
                errx(1, "invalid transfer rate: %d", rate);
        }

        if (cyls >= 0)
                fdt.tracks = cyls;
        if (secs >= 0)
                fdt.sectrac = secs;
        if (fdt.sectrac > FD_MAX_NSEC)
                errx(1, "too many sectors per track, max value is %d",
                        FD_MAX_NSEC);
        if (heads >= 0)
                fdt.heads = heads;
        if (gaplen >= 0)
                fdt.gap2 = gaplen;
        if (secsize >= 0)
                fdt.secsize = secsize;
        if (steps >= 0)
                fdt.step = steps;

        bytes_per_track = fdt.sectrac * (1<<fdt.secsize) * 128;
        tracks_per_dot = fdt.tracks * fdt.heads / 40;
        if (tracks_per_dot == 0)
                tracks_per_dot++;

        if (verify_only) {
                if (!quiet)
                        printf("Verify %dK floppy `%s'.\n",
                                fdt.tracks * fdt.heads * bytes_per_track / 1024,
                                devname);
        }
        else if (!quiet) {
                printf("Format %dK floppy `%s'? (y/n): ",
                        fdt.tracks * fdt.heads * bytes_per_track / 1024,
                        devname);
                if (!yes()) {
                        printf("Not confirmed.\n");
                        exit(0);
                }
        }

        /*
         * Formatting.
         */
        if (!quiet) {
                printf("Processing ");
                for (track = 0; track < fdt.tracks * fdt.heads; track++) {
                        if (!((track + 1) % tracks_per_dot))
                                putchar('-');
                }
                putchar('\r');
                printf("Processing ");
                fflush(stdout);
        }

        error = errs = 0;

        for (track = 0; track < fdt.tracks * fdt.heads; track++) {
                if (!verify_only) {
                        format_track(fd, track / fdt.heads, fdt.sectrac,
                                track % fdt.heads, fdt.rate, fdt.gap2,
                                     fdt.secsize, fill,
                                     intleave >= 0 ? intleave : 1);
                        if (!quiet && !((track + 1) % tracks_per_dot)) {
                                putchar('F');
                                fflush(stdout);
                        }
                }
                if (verify) {
                        if (verify_track(fd, track, bytes_per_track) < 0)
                                error = errs = 1;
                        if (!quiet && !((track + 1) % tracks_per_dot)) {
                                if (!verify_only)
                                        putchar('\b');
                                if (error) {
                                        putchar('E');
                                        error = 0;
                                }
                                else
                                        putchar('V');
                                fflush(stdout);
                        }
                }
        }
        close(fd);
        if (!quiet)
                printf(" done.\n");

        exit(errs);
}