/*      $NetBSD: newdisk.c,v 1.11 2014/03/26 08:17:59 christos Exp $    */

/*-
 * Copyright (c) 1999 Minoura Makoto
 * 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 ``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 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.
 */

/*
 * Create the disk mark for x68k SCSI IPL.
 * It used to be a shell/awk script, but is rewritten in order to be fit with
 * the install kernel.
 *
 * Usage: /usr/mdec/newdisk [-vnfc] [-m /usr/mdec/mboot] /dev/rsd?c
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <err.h>
#include <fcntl.h>
#include <unistd.h>
#include <util.h>
#include <sys/param.h>
#include <sys/disklabel.h>
#include <sys/dkio.h>
#include <sys/ioctl.h>

const char *mboot = MBOOT;
char dev[MAXPATHLEN];
char buf[4096 + 1];

const char copyright[] = "NetBSD/x68k SCSI Primary Boot. ";

int verbose = 0, dry_run = 0, force = 0, check_only = 0, mark_only = 0;

void usage(void) __attribute__((__noreturn__));
int main(int, char *[]);

void
usage(void)
{
        fprintf(stderr,
                "Usage: %s [-v] [-n] [-f] [-c] [-m /usr/mdec/mboot] "
                "/dev/rsdXc\n", getprogname());
        exit(1);
        /* NOTREACHED */
}

int
main(int argc, char *argv[])
{
        int ch;
        int fd;
        struct disklabel label;

        while ((ch = getopt(argc, argv, "vnfcm:p")) != -1) {
                switch (ch) {
                case 'v':
                        verbose = 1;
                        break;
                case 'n':
                        dry_run = 1;
                        break;
                case 'f':
                        force = 1;
                        break;
                case 'c':
                        check_only = 1;
                        break;
                case 'm':
                        mboot = optarg;
                        break;
                case 'p':
                        mark_only = 1;
                        break;
                default:
                        usage();
                }
        }
        argc -= optind;
        argv += optind;

        if (argc != 1)
                usage();

        fd = opendisk(argv[0], O_RDONLY, dev, MAXPATHLEN, 0);
        if (fd < 0)
                err(1, "opening %s", dev);
        if (access(mboot, R_OK) < 0)
                err(1, "checking %s", mboot);

        if (read(fd, buf, 512) < 0)
                err(1, "reading %s", dev);
        if (strncmp(buf, "X68SCSI1", 8) == 0 && !force)
                errx(1, "%s is already marked.  "
                        "Use -f to overwrite the existing mark.", dev);
        if (check_only)
                return 0;

        if (verbose)
                fprintf(stderr, "Inspecting %s... ", dev);

        if (ioctl(fd, DIOCGDINFO, &label) < 0)
                err(1, "inspecting %s", dev);
        close(fd);
        if (label.d_secsize != 512)
                errx(1, "This type of disk is not supported by NetBSD.");

        if (verbose)
                fprintf(stderr, "total number of sector is %d.\n",
                        label.d_secperunit);

        if (verbose)
                fprintf(stderr, "Building disk mark... ");
        memset(buf, 0, 3072);
#define n label.d_secperunit
        snprintf(buf, sizeof(buf), "X68SCSI1%c%c%c%c%c%c%c%c%s",
                2, 0,
                (n/16777216)%256, (n/65536)%256, (n/256)%256, n%256,
                1, 0, copyright);
#undef n
        if (verbose)
                fprintf(stderr, "done.\n");

        if (verbose)
                fprintf(stderr, "Merging %s... ", mboot);
        fd = open(mboot, O_RDONLY);
        if (fd < 0)
                err(1, "opening %s", mboot);
        if (read(fd, buf+1024, 1024) < 0)
                err(1, "reading %s", mboot);
        close(fd);
        if (verbose)
                fprintf(stderr, "done.\n");

        if (!mark_only) {
                if (verbose)
                        fprintf(stderr,
                                "Creating an empty partition table... ");
#define n (label.d_secperunit/2)
                snprintf(buf + 2048, sizeof(buf) - 2048,
                        "X68K%c%c%c%c%c%c%c%c%c%c%c%c",
                        0, 0, 0, 32,
                        (n/16777215)%256, (n/65536)%256, (n/256)%256, n%256,
                        (n/16777215)%256, (n/65536)%256, (n/256)%256, n%256);
#undef n
                if (verbose)
                        fprintf(stderr, "done.\n");
        }

        if (dry_run) {
                char filename[MAXPATHLEN] = "/tmp/diskmarkXXXXX";
                fd = mkstemp(filename);
                if (fd < 0)
                        err(1, "opening %s", filename);
                if (write(fd, buf, 4096) < 0)
                        err(1, "writing %s", filename);
                close(fd);
                fprintf(stderr, "Disk mark is kept in %s.\n", filename);
        } else {
                int mode = 1;

                if (verbose)
                        fprintf(stderr, "Writing... ");
                fd = open(dev, O_WRONLY);
                if (fd < 0)
                        err(1, "opening %s", dev);
                if (ioctl(fd, DIOCWLABEL, (char *)&mode) < 0)
                        err(1, "DIOCWLABEL %s", dev);
                if (write(fd, buf, 4096) != 4096) {
                        mode = 0;
                        ioctl(fd, DIOCWLABEL, (char *)&mode);
                        err(1, "DIOCWLABEL %s", dev);
                }
                ioctl(fd, DIOCWLABEL, (char *)&mode);
                if (verbose)
                        fprintf(stderr, "done.\n");
                close(fd);
        }

        return 0;
}