/*
 * Copyright (c) 2007 The DragonFly Project.  All rights reserved.
 * 
 * This code is derived from software contributed to The DragonFly Project
 * by Matthew Dillon <dillon@backplane.com>
 * 
 * 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. Neither the name of The DragonFly Project 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 COPYRIGHT HOLDERS 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
 * COPYRIGHT HOLDERS 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.
 */

#define DKTYPENAMES
#include <sys/param.h>
#include <sys/fcntl.h>
#include <sys/dtype.h>
#include <sys/diskslice.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <uuid.h>

static int quietMode;
static int extendedMode;

static void dumppart(const char *path, struct partinfo *dpart);
static void usage(const char *av0);

int
main(int ac, char **av)
{
        struct partinfo dpart;
        int i;
        int ch;
        int fd;

        while ((ch = getopt(ac, av, "qx")) != -1) {
                switch(ch) {
                case 'q':
                        quietMode = 1;
                        break;
                case 'x':
                        extendedMode = 1;
                        break;
                default:
                        usage(av[0]);
                }
        }
        for (i = optind; i < ac; ++i) {
                if ((fd = open(av[i], O_RDONLY)) < 0) {
                        if (errno != ENXIO || quietMode == 0)
                                printf("%-16s %s\n", av[i], strerror(errno));
                        continue;
                }
                bzero(&dpart, sizeof(dpart));
                if (ioctl(fd, DIOCGPART, &dpart) < 0) {
                        printf("%-16s %s\n", av[i], strerror(errno));
                } else if (dpart.media_size == 0 && dpart.fstype == 0 &&
                           uuid_is_nil(&dpart.fstype_uuid, NULL)) {
                        if (quietMode == 0)
                                printf("%-16s unused\n", av[i]);
                } else {
                        dumppart(av[i], &dpart);
                }
                close(fd);
        }
        return(0);
}

static
void
dumppart(const char *path, struct partinfo *dpart)
{
        printf("%-16s ", path);
        printf("blksize=%-4d offset=0x%012jx size=0x%012jx ",
                dpart->media_blksize,
                (uintmax_t)dpart->media_offset,
                (uintmax_t)dpart->media_size
        );
        if (dpart->media_size >= 100LL*1024*1024*1024) {
                printf("%7.2f GB", 
                        (double)dpart->media_size / 
                        (1024.0*1024.0*1024.0)
                );
        } else if (dpart->media_size >= 1024*1024) {
                printf("%7.2f MB", 
                        (double)dpart->media_size / 
                        (1024.0*1024.0)
                );
        } else {
                printf("%7.2f KB", 
                        (double)dpart->media_size / 1024.0
                );
        }
        if (extendedMode) {
                if (!uuid_is_nil(&dpart->fstype_uuid, NULL)) {
                        char *str;
                        uuid_addr_lookup(&dpart->fstype_uuid, &str, NULL);
                        if (str == NULL)
                                uuid_to_string(&dpart->fstype_uuid, &str, NULL);
                        printf(" fstype='%s'", str ? str : "<illegal>");
                }
                if (dpart->fstype) {
                        printf(" ofstype=");
                        if (dpart->fstype < 0 || 
                            dpart->fstype >= (int)FSMAXTYPES) {
                                printf("%d", dpart->fstype);
                        } else {
                                printf("%s", fstypenames[dpart->fstype]);
                        }
                }
                if (!uuid_is_nil(&dpart->storage_uuid, NULL)) {
                        char *str = NULL;
                        uuid_to_string(&dpart->storage_uuid, &str, NULL);
                        printf(" storage_uuid='%s'", str ? str : "<illegal>");
                }
                if (dpart->reserved_blocks) {
                        /*
                         * note: rsvdlabel is inclusive of rsvdplat. i.e.
                         * they are not relative to each other.
                         */
                        printf(" reserved=%jd",
                                (intmax_t)dpart->reserved_blocks);
                }
        }
        printf("\n");
}

static
void
usage(const char *av0)
{
        fprintf(stderr, "%s [-qx] device ...\n", av0);
        exit(1);
}