/*-
 * Copyright (c) 2002 Marcel Moolenaar
 * 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.
 *
 * $FreeBSD: src/sbin/gpt/destroy.c,v 1.6 2005/08/31 01:47:19 marcel Exp $
 */

#include <sys/types.h>

#include <err.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "gpt.h"

static bool recoverable = false;

static void
usage_destroy(void)
{
        fprintf(stderr,
                "usage: %s [-r] device ...\n", getprogname());
        exit(1);
}

void
destroy(int fd, bool quiet)
{
        map_t *pri_hdr, *sec_hdr;

        pri_hdr = map_find(MAP_TYPE_GPT_PRI_HDR);
        sec_hdr = map_find(MAP_TYPE_GPT_SEC_HDR);

        if (pri_hdr == NULL && sec_hdr == NULL) {
                if (!quiet) {
                        warnx("%s: error: device doesn't contain a GPT",
                              device_name);
                }
                return;
        }

        if (recoverable && sec_hdr == NULL) {
                warnx("%s: error: recoverability not possible", device_name);
                return;
        }

        if (pri_hdr != NULL) {
                bzero(pri_hdr->map_data, secsz);
                gpt_write(fd, pri_hdr);
        }

        if (!recoverable && sec_hdr != NULL) {
                bzero(sec_hdr->map_data, secsz);
                gpt_write(fd, sec_hdr);
        }
}

int
cmd_destroy(int argc, char *argv[])
{
        int ch, fd;

        while ((ch = getopt(argc, argv, "hr")) != -1) {
                switch(ch) {
                case 'r':
                        recoverable = true;
                        break;
                case 'h':
                default:
                        usage_destroy();
                }
        }

        if (argc == optind)
                usage_destroy();

        while (optind < argc) {
                fd = gpt_open(argv[optind++]);
                if (fd == -1) {
                        warn("unable to open device '%s'", device_name);
                        continue;
                }

                destroy(fd, false);

                gpt_close(fd);
        }

        return (0);
}