/*
 * Copyright (c) 2007,2020 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.
 */
/*
 * Copyright (c) 1987, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Symmetric Computer Systems.
 *
 * 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 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.
 *
 * @(#)disklabel.c      1.2 (Symmetric) 11/28/85
 * @(#)disklabel.c      8.2 (Berkeley) 1/7/94
 * $FreeBSD: src/sbin/disklabel/disklabel.c,v 1.28.2.15 2003/01/24 16:18:16 des Exp $
 */

#include <sys/param.h>
#include <sys/stat.h>
#include <sys/wait.h>
#define DKTYPENAMES
#include <sys/disklabel64.h>
#include <sys/diskslice.h>
#include <sys/diskmbr.h>
#include <sys/dtype.h>
#include <sys/sysctl.h>
#include <disktab.h>
#include <fcntl.h>
#include <fstab.h>

#include <vfs/ufs/dinode.h>
#include <vfs/ufs/fs.h>

#include <unistd.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <stdarg.h>
#include <stddef.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <uuid.h>
#include "pathnames.h"

extern uint32_t crc32(const void *buf, size_t size);

static void     makelabel(const char *, const char *, struct disklabel64 *);
static int      writelabel(int, struct disklabel64 *);
static int      expandlabel(int f, struct disklabel64 *lp, int *wbackp);
static void     l_perror(const char *);
static void     display(FILE *, const struct disklabel64 *);
static int      edit(struct disklabel64 *, int);
static int      editit(void);
static char     *skip(char *);
static char     *word(char *);
static int      parse_field_val(char **, char **, u_int64_t *, int);
static int      getasciilabel(FILE *, struct disklabel64 *);
static int      getasciipartspec(char *, struct disklabel64 *, int, int, uint32_t);
static int      getasciipartuuid(char *, struct disklabel64 *, int, int, uint32_t);
static int      checklabel(struct disklabel64 *);
static void     Warning(const char *, ...) __printflike(1, 2);
static void     usage(void);
static struct disklabel64 *getvirginlabel(void);
static struct disklabel64 *readlabel(int);
static struct disklabel64 *makebootarea(int);

#define DEFEDITOR       _PATH_VI
#define streq(a,b)      (strcmp(a,b) == 0)

static char     *dkname;
static char     *specname;
static char     tmpfil[] = PATH_TMPFILE;

static struct   disklabel64 lab;

#define MAX_PART ('z')
#define MAX_NUM_PARTS (1 + MAX_PART - 'a')
static char     part_size_type[MAX_NUM_PARTS];
static char     part_offset_type[MAX_NUM_PARTS];
static int      part_set[MAX_NUM_PARTS];

static int      installboot;
static int      expandopt;
static int      boot1size;
static int      boot1lsize;
static int      boot2size;
static char     *boot1buf;
static char     *boot2buf;
static char     *boot1path;
static char     *boot2path;

static enum {
        UNSPEC, EDIT, NOWRITE, READ, RESTORE, WRITE, WRITEABLE, WRITEBOOT,
        EXPAND
} op = UNSPEC;

static int      rflag;
static int      Vflag;
static int      disable_write;   /* set to disable writing to disk label */

#ifdef DEBUG
static int      debug;
#define OPTIONS "BNRWb:denrs:Vwx"
#else
#define OPTIONS "BNRWb:enrs:Vwx"
#endif

int
main(int argc, char *argv[])
{
        struct disklabel64 *lp;
        FILE *t;
        int ch, f = 0, flag, error = 0;
        const char *name = NULL;
        const char *dtype = NULL;

        while ((ch = getopt(argc, argv, OPTIONS)) != -1)
                switch (ch) {
                        case 'B':
                                ++installboot;
                                break;
                        case 'b':
                                boot1path = optarg;
                                break;

                        case 's':
                                boot2path = optarg;
                                break;
                        case 'N':
                                if (op != UNSPEC)
                                        usage();
                                op = NOWRITE;
                                break;
                        case 'n':
                                disable_write = 1;
                                break;
                        case 'R':
                                if (op != UNSPEC)
                                        usage();
                                op = RESTORE;
                                break;
                        case 'W':
                                if (op != UNSPEC)
                                        usage();
                                op = WRITEABLE;
                                break;
                        case 'e':
                                if (op != UNSPEC)
                                        usage();
                                op = EDIT;
                                break;
                        case 'V':
                                ++Vflag;
                                break;
                        case 'r':
                                ++rflag;
                                break;
                        case 'w':
                                if (op != UNSPEC)
                                        usage();
                                op = WRITE;
                                break;
                        case 'x':
                                expandopt++;
                                op = EXPAND;
                                break;
#ifdef DEBUG
                        case 'd':
                                debug++;
                                break;
#endif
                        case '?':
                        default:
                                usage();
                }
        argc -= optind;
        argv += optind;
        if (installboot) {
                rflag++;
                if (op == UNSPEC)
                        op = WRITEBOOT;
        } else {
                if (op == UNSPEC)
                        op = READ;
                boot1path = NULL;
                boot2path = NULL;
        }
        if (argc < 1)
                usage();

        dkname = getdevpath(argv[0], 0);
        specname = dkname;
        f = open(specname, op == READ ? O_RDONLY : O_RDWR);
        if (f < 0)
                err(4, "%s", specname);

        switch(op) {

        case UNSPEC:
                break;

        case EDIT:
                if (argc != 1)
                        usage();
                lp = readlabel(f);
                error = edit(lp, f);
                break;

        case NOWRITE:
                flag = 0;
                if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0)
                        err(4, "ioctl DIOCWLABEL");
                break;

        case READ:
                if (argc != 1)
                        usage();
                lp = readlabel(f);
                display(stdout, lp);
                error = checklabel(lp);
                break;

        case EXPAND:
                {
                        int wback = 0;

                        lp = readlabel(f);
                        error = expandlabel(f, lp, &wback);
                        if (checklabel(lp) == 0 && wback)
                                error = writelabel(f, lp);
                }
                break;

        case RESTORE:
                if (installboot && argc == 3) {
                        makelabel(argv[2], 0, &lab);
                        argc--;

                        /*
                         * We only called makelabel() for its side effect
                         * of setting the bootstrap file names.  Discard
                         * all changes to `lab' so that all values in the
                         * final label come from the ASCII label.
                         */
                        bzero((char *)&lab, sizeof(lab));
                }
                if (argc != 2)
                        usage();
                if (!(t = fopen(argv[1], "r")))
                        err(4, "%s", argv[1]);
                if (!getasciilabel(t, &lab))
                        exit(1);
                lp = makebootarea(f);
                bcopy(&lab.d_magic, &lp->d_magic,
                      sizeof(lab) - offsetof(struct disklabel64, d_magic));
                error = writelabel(f, lp);
                break;

        case WRITE:
                if (argc == 3) {
                        name = argv[2];
                        argc--;
                }
                if (argc == 2)
                        dtype = argv[1];
                else if (argc == 1)
                        dtype = "auto";
                else
                        usage();
                makelabel(dtype, name, &lab);
                lp = makebootarea(f);
                bcopy(&lab.d_magic, &lp->d_magic,
                      sizeof(lab) - offsetof(struct disklabel64, d_magic));
                if (checklabel(lp) == 0)
                        error = writelabel(f, lp);
                break;

        case WRITEABLE:
                flag = 1;
                if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0)
                        err(4, "ioctl DIOCWLABEL");
                break;

        case WRITEBOOT:
        {
                struct disklabel64 tlab;

                lp = readlabel(f);
                tlab = *lp;
                if (argc == 2)
                        makelabel(argv[1], 0, &lab);
                lp = makebootarea(f);
                bcopy(&tlab.d_magic, &lp->d_magic,
                      sizeof(tlab) - offsetof(struct disklabel64, d_magic));
                if (checklabel(lp) == 0)
                        error = writelabel(f, lp);
                break;
        }
        }
        exit(error);
}

/*
 * Construct a prototype disklabel from /etc/disktab.  As a side
 * effect, set the names of the primary and secondary boot files
 * if specified.
 */
static void
makelabel(const char *type, const char *name, struct disklabel64 *lp)
{
        struct disklabel64 *dp;

        if (streq(type, "auto"))
                dp = getvirginlabel();
        else
                errx(1, "no disktab(5) support yet; only 'auto' allowed");
        *lp = *dp;

        if (name)
                strlcpy((char *)lp->d_packname, name, sizeof(lp->d_packname));
}

static int
writelabel(int f, struct disklabel64 *lp)
{
        struct disklabel64 *blp;
        int flag;
        int r;
        size_t lpsize;
        size_t lpcrcsize;

        lpsize = offsetof(struct disklabel64, d_partitions[lp->d_npartitions]);
        lpcrcsize = lpsize - offsetof(struct disklabel64, d_magic);

        if (disable_write) {
                Warning("write to disk label suppressed - label was as follows:");
                display(stdout, lp);
                return (0);
        } else {
                lp->d_magic = DISKMAGIC64;
                lp->d_crc = 0;
                lp->d_crc = crc32(&lp->d_magic, lpcrcsize);
                if (rflag) {
                        /*
                         * Make sure the boot area is not too large
                         */
                        if (boot2buf) {
                                int lpbsize = (int)(lp->d_pbase - lp->d_bbase);
                                if (lp->d_pbase == 0) {
                                        errx(1, "no space was set aside in "
                                                "the disklabel for boot2!");
                                }
                                if (boot2size > lpbsize) {
                                        errx(1, "label did not reserve enough "
                                                "space for boot!  %d/%d",
                                             boot2size, lpbsize);
                                }
                        }

                        /*
                         * First set the kernel disk label,
                         * then write a label to the raw disk.
                         * If the SDINFO ioctl fails because it is
                         * unimplemented, keep going; otherwise, the kernel
                         * consistency checks may prevent us from changing
                         * the current (in-core) label.
                         */
                        if (ioctl(f, DIOCSDINFO64, lp) < 0 &&
                                errno != ENODEV && errno != ENOTTY) {
                                l_perror("ioctl DIOCSDINFO");
                                return (1);
                        }
                        lseek(f, (off_t)0, SEEK_SET);

                        /*
                         * The disklabel embeds areas which we may not
                         * have wanted to change.  Merge those areas in
                         * from disk.
                         */
                        blp = makebootarea(f);
                        if (blp != lp) {
                                bcopy(&lp->d_magic, &blp->d_magic,
                                      sizeof(*lp) -
                                      offsetof(struct disklabel64, d_magic));
                        }

                        /*
                         * write enable label sector before write
                         * (if necessary), disable after writing.
                         */
                        flag = 1;
                        if (ioctl(f, DIOCWLABEL, &flag) < 0)
                                warn("ioctl DIOCWLABEL");

                        r = write(f, boot1buf, boot1lsize);
                        if (r != (ssize_t)boot1lsize) {
                                warn("write");
                                return (1);
                        }
                        /*
                         * Output the remainder of the disklabel
                         */
                        if (boot2buf) {
                                lseek(f, lp->d_bbase, 0);
                                r = write(f, boot2buf, boot2size);
                                if (r != boot2size) {
                                        warn("write");
                                        return(1);
                                }
                        }
                        flag = 0;
                        ioctl(f, DIOCWLABEL, &flag);
                } else if (ioctl(f, DIOCWDINFO64, lp) < 0) {
                        l_perror("ioctl DIOCWDINFO64");
                        return (1);
                }
        }
        return (0);
}

static void
l_perror(const char *s)
{
        switch (errno) {

        case ESRCH:
                warnx("%s: no disk label on disk;", s);
                fprintf(stderr, "add \"-r\" to install initial label\n");
                break;

        case EINVAL:
                warnx("%s: label magic number or checksum is wrong!", s);
                fprintf(stderr, "(disklabel or kernel is out of date?)\n");
                break;

        case EBUSY:
                warnx("%s: open partition would move or shrink", s);
                break;

        case ENOATTR:
                warnx("%s: the disk already has a label of a different type,\n"
                      "probably a 32 bit disklabel.  It must be cleaned out "
                      "first.\n", s);
                break;

        default:
                warn(NULL);
                break;
        }
}

/*
 * Fetch disklabel for disk.
 * Use ioctl to get label unless -r flag is given.
 */
static struct disklabel64 *
readlabel(int f)
{
        struct disklabel64 *lp;
        u_int32_t savecrc;
        size_t lpcrcsize;

        if (rflag) {
                /*
                 * Allocate space for the label.  The boot1 code, if any,
                 * is embedded in the label.  The label overlaps the boot1
                 * code.
                 */
                lp = makebootarea(f);
                lpcrcsize = offsetof(struct disklabel64,
                                     d_partitions[lp->d_npartitions]) -
                            offsetof(struct disklabel64, d_magic);
                savecrc = lp->d_crc;
                lp->d_crc = 0;
                if (lp->d_magic != DISKMAGIC64)
                        errx(1, "bad pack magic number");
                if (lp->d_npartitions > MAXPARTITIONS64 ||
                    savecrc != crc32(&lp->d_magic, lpcrcsize)
                ) {
                        errx(1, "corrupted disklabel64");
                }
                lp->d_crc = savecrc;
        } else {
                /*
                 * Just use a static structure to hold the label.  Note
                 * that DIOCSDINFO64 does not overwrite the boot1 area
                 * even though it is part of the disklabel64 structure.
                 */
                lp = &lab;
                if (Vflag) {
                        if (ioctl(f, DIOCGDVIRGIN64, lp) < 0) {
                                l_perror("ioctl DIOCGDVIRGIN64");
                                exit(4);
                        }
                } else {
                        if (ioctl(f, DIOCGDINFO64, lp) < 0) {
                                l_perror("ioctl DIOCGDINFO64");
                                exit(4);
                        }
                }
        }
        return (lp);
}

/*
 * Construct a boot area for boot1 and boot2 and return the location of
 * the label within the area.  The caller will overwrite the label so
 * we don't actually have to read it.
 */
static struct disklabel64 *
makebootarea(int f)
{
        struct disklabel64 *lp;
        struct partinfo info;
        u_int32_t secsize;
        struct stat st;
        int fd;
        int r;

        if (ioctl(f, DIOCGPART, &info) == 0)
                secsize = info.media_blksize;
        else
                secsize = 512;

        if (boot1buf == NULL) {
                size_t rsize;

                rsize = roundup2(sizeof(struct disklabel64), secsize);
                boot1size = offsetof(struct disklabel64, d_magic);
                boot1lsize = rsize;
                boot1buf = malloc(rsize);
                bzero(boot1buf, rsize);
                r = read(f, boot1buf, rsize);
                if (r != (int)rsize) {
                        free(boot1buf);
                        err(4, "%s", specname);
                }
        }
        lp = (void *)boot1buf;

        if (installboot == 0)
                return(lp);

        if (boot2buf == NULL) {
                boot2size = BOOT2SIZE64;
                boot2buf = malloc(boot2size);
                bzero(boot2buf, boot2size);
        }

        /*
         * If installing the boot code, read it into the appropriate portions
         * of the buffer(s)
         */
        if (boot1path == NULL)
                asprintf(&boot1path, "%s/boot1_64", _PATH_BOOTDIR);
        if (boot2path == NULL)
                asprintf(&boot2path, "%s/boot2_64", _PATH_BOOTDIR);

        if ((fd = open(boot1path, O_RDONLY)) < 0)
                err(4, "%s", boot1path);
        if (fstat(fd, &st) < 0)
                err(4, "%s", boot1path);
        if (st.st_size > boot1size)
                err(4, "%s must be exactly %d bytes!", boot1path, boot1size);
        if (read(fd, boot1buf, boot1size) != boot1size)
                err(4, "%s must be exactly %d bytes!", boot1path, boot1size);
        close(fd);

        if ((fd = open(boot2path, O_RDONLY)) < 0)
                err(4, "%s", boot2path);
        if (fstat(fd, &st) < 0)
                err(4, "%s", boot2path);
        if (st.st_size > boot2size)
                err(4, "%s must be <= %d bytes!", boot2path, boot2size);
        if ((r = read(fd, boot2buf, boot2size)) < 1)
                err(4, "%s is empty!", boot2path);
        boot2size = roundup2(r, secsize);
        close(fd);

        /*
         * XXX dangerously dedicated support goes here XXX
         */
        return (lp);
}

static void
display(FILE *f, const struct disklabel64 *lp)
{
        const struct partition64 *pp;
        char *str;
        unsigned int part;
        int didany;
        uint32_t blksize;

        /*
         * Use a human readable block size if possible.  This is for
         * display and editing purposes only.
         */
        if (lp->d_align > 1024)
                blksize = 1024;
        else
                blksize = lp->d_align;

        fprintf(f, "# %s:\n", specname);
        fprintf(f, "#\n");
        fprintf(f, "# Calculated informational fields for the slice:\n");
        fprintf(f, "#\n");
        fprintf(f, "# boot space: %10ju bytes\n",
                (uintmax_t)(lp->d_pbase - lp->d_bbase));
        fprintf(f, "# data space: %10ju blocks\t# %6.2f MB (%ju bytes)\n",
                        (uintmax_t)(lp->d_pstop - lp->d_pbase) / blksize,
                        (double)(lp->d_pstop - lp->d_pbase) / 1024.0 / 1024.0,
                        (uintmax_t)(lp->d_pstop - lp->d_pbase));
        fprintf(f, "#\n");
        fprintf(f, "# NOTE: The partition data base and stop are physically\n");
        fprintf(f, "#       aligned instead of slice-relative aligned.\n");
        fprintf(f, "#\n");
        fprintf(f, "# All byte equivalent offsets must be aligned.\n");
        fprintf(f, "#\n");

        uuid_to_string(&lp->d_stor_uuid, &str, NULL);
        fprintf(f, "diskid: %s\n", str ? str : "<unknown>");
        free(str);

        fprintf(f, "label: %s\n", lp->d_packname);
        fprintf(f, "boot2 data base:      0x%012jx\n", (uintmax_t)lp->d_bbase);
        fprintf(f, "partitions data base: 0x%012jx\n", (uintmax_t)lp->d_pbase);
        fprintf(f, "partitions data stop: 0x%012jx\n", (uintmax_t)lp->d_pstop);
        fprintf(f, "backup label:         0x%012jx\n", (uintmax_t)lp->d_abase);
        fprintf(f, "total size:           0x%012jx\t# %6.2f MB\n",
                (uintmax_t)lp->d_total_size,
                (double)lp->d_total_size / 1024.0 / 1024.0);
        fprintf(f, "alignment: %u\n", lp->d_align);
        fprintf(f, "display block size: %u\t# for partition display and edit only\n",
                blksize);

        fprintf(f, "\n");
        fprintf(f, "%u partitions:\n", lp->d_npartitions);
        fprintf(f, "#          size     offset    fstype   fsuuid\n");
        didany = 0;
        for (part = 0; part < lp->d_npartitions; part++) {
                pp = &lp->d_partitions[part];
                const u_long onemeg = 1024 * 1024;

                if (pp->p_bsize == 0)
                        continue;
                didany = 1;
                fprintf(f, "  %c: ", 'a' + part);

                if (pp->p_bsize % lp->d_align)
                    fprintf(f, "%10s  ", "ILLEGAL");
                else
                    fprintf(f, "%10ju ", (uintmax_t)pp->p_bsize / blksize);

                if ((pp->p_boffset - lp->d_pbase) % lp->d_align)
                    fprintf(f, "%10s  ", "ILLEGAL");
                else
                    fprintf(f, "%10ju  ",
                            (uintmax_t)(pp->p_boffset - lp->d_pbase) / blksize);

                if (pp->p_fstype < FSMAXTYPES)
                        fprintf(f, "%8.8s", fstypenames[pp->p_fstype]);
                else
                        fprintf(f, "%8d", pp->p_fstype);
                fprintf(f, "\t# %11.3fMB", (double)pp->p_bsize / onemeg);
                fprintf(f, "\n");
        }
        for (part = 0; part < lp->d_npartitions; part++) {
                pp = &lp->d_partitions[part];

                if (pp->p_bsize == 0)
                        continue;

                if (uuid_is_nil(&lp->d_stor_uuid, NULL) == 0) {
                        fprintf(f, "  %c-stor_uuid: ", 'a' + part);
                        str = NULL;
                        uuid_to_string(&pp->p_stor_uuid, &str, NULL);
                        if (str) {
                                fprintf(f, "%s", str);
                                free(str);
                        }
                        fprintf(f, "\n");
                }
        }
        if (didany == 0) {
                fprintf(f, "# EXAMPLE\n");
                fprintf(f, "#a:          4g          0    4.2BSD\n");
                fprintf(f, "#a:          *           *    4.2BSD\n");

        }
        fflush(f);
}

static int
edit(struct disklabel64 *lp, int f)
{
        int c, fd;
        struct disklabel64 label;
        FILE *fp;

        if ((fd = mkstemp(tmpfil)) == -1 ||
            (fp = fdopen(fd, "w")) == NULL) {
                warnx("can't create %s", tmpfil);
                return (1);
        }
        display(fp, lp);
        fclose(fp);
        for (;;) {
                if (!editit())
                        break;
                fp = fopen(tmpfil, "r");
                if (fp == NULL) {
                        warnx("can't reopen %s for reading", tmpfil);
                        break;
                }
                bzero((char *)&label, sizeof(label));
                if (getasciilabel(fp, &label)) {
                        *lp = label;
                        if (writelabel(f, lp) == 0) {
                                fclose(fp);
                                unlink(tmpfil);
                                return (0);
                        }
                }
                fclose(fp);
                printf("re-edit the label? [y]: "); fflush(stdout);
                c = getchar();
                if (c != EOF && c != (int)'\n')
                        while (getchar() != (int)'\n')
                                ;
                if  (c == (int)'n')
                        break;
        }
        unlink(tmpfil);
        return (1);
}

static int
editit(void)
{
        int pid, xpid;
        int status, omask;
        const char *ed;

        omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP));
        while ((pid = fork()) < 0) {
                if (errno == EPROCLIM) {
                        warnx("you have too many processes");
                        return(0);
                }
                if (errno != EAGAIN) {
                        warn("fork");
                        return(0);
                }
                sleep(1);
        }
        if (pid == 0) {
                sigsetmask(omask);
                setgid(getgid());
                setuid(getuid());
                if ((ed = getenv("EDITOR")) == NULL)
                        ed = DEFEDITOR;
                execlp(ed, ed, tmpfil, NULL);
                err(1, "%s", ed);
        }
        while ((xpid = wait(&status)) >= 0)
                if (xpid == pid)
                        break;
        sigsetmask(omask);
        return(!status);
}

static char *
skip(char *cp)
{

        while (*cp != '\0' && isspace(*cp))
                cp++;
        if (*cp == '\0' || *cp == '#')
                return (NULL);
        return (cp);
}

static char *
word(char *cp)
{
        char c;

        while (*cp != '\0' && !isspace(*cp) && *cp != '#')
                cp++;
        if ((c = *cp) != '\0') {
                *cp++ = '\0';
                if (c != '#')
                        return (skip(cp));
        }
        return (NULL);
}

/*
 * Read an ascii label in from fd f,
 * in the same format as that put out by display(),
 * and fill in lp.
 */
static int
getasciilabel(FILE *f, struct disklabel64 *lp)
{
        char *cp;
        u_int part;
        char *tp, line[BUFSIZ];
        u_long v;
        uint32_t blksize = 0;
        uint64_t vv;
        int lineno = 0, errors = 0;
        char empty[] = "";

        bzero(&part_set, sizeof(part_set));
        bzero(&part_size_type, sizeof(part_size_type));
        bzero(&part_offset_type, sizeof(part_offset_type));
        while (fgets(line, sizeof(line) - 1, f)) {
                lineno++;
                if ((cp = strchr(line,'\n')) != NULL)
                        *cp = '\0';
                cp = skip(line);
                if (cp == NULL)
                        continue;
                tp = strchr(cp, ':');
                if (tp == NULL) {
                        fprintf(stderr, "line %d: syntax error\n", lineno);
                        errors++;
                        continue;
                }
                *tp++ = '\0', tp = skip(tp);
                if (sscanf(cp, "%lu partitions", &v) == 1) {
                        if (v == 0 || v > MAXPARTITIONS64) {
                                fprintf(stderr,
                                    "line %d: bad # of partitions\n", lineno);
                                lp->d_npartitions = MAXPARTITIONS64;
                                errors++;
                        } else
                                lp->d_npartitions = v;
                        continue;
                }
                if (tp == NULL)
                        tp = empty;

                if (streq(cp, "diskid")) {
                        uint32_t status = 0;
                        uuid_from_string(tp, &lp->d_stor_uuid, &status);
                        if (status != uuid_s_ok) {
                                fprintf(stderr,
                                    "line %d: %s: illegal UUID\n",
                                    lineno, tp);
                                errors++;
                        }
                        continue;
                }
                if (streq(cp, "label")) {
                        strlcpy((char *)lp->d_packname, tp, sizeof(lp->d_packname));
                        continue;
                }

                if (streq(cp, "alignment")) {
                        v = strtoul(tp, NULL, 0);
                        if (v <= 0 || (v & DEV_BMASK) != 0 || v > 1024*1024) {
                                fprintf(stderr,
                                    "line %d: %s: bad alignment\n",
                                    lineno, tp);
                                errors++;
                        } else {
                                lp->d_align = v;
                        }
                        continue;
                }
                if (streq(cp, "total size")) {
                        vv = strtoull(tp, NULL, 0);
                        if (vv == 0 || vv == (uint64_t)-1) {
                                fprintf(stderr, "line %d: %s: bad %s\n",
                                    lineno, tp, cp);
                                errors++;
                        } else {
                                lp->d_total_size = vv;
                        }
                        continue;
                }
                if (streq(cp, "boot2 data base")) {
                        vv = strtoull(tp, NULL, 0);
                        if (vv == 0 || vv == (uint64_t)-1) {
                                fprintf(stderr, "line %d: %s: bad %s\n",
                                    lineno, tp, cp);
                                errors++;
                        } else {
                                lp->d_bbase = vv;
                        }
                        continue;
                }
                if (streq(cp, "partitions data base")) {
                        vv = strtoull(tp, NULL, 0);
                        if (vv == 0 || vv == (uint64_t)-1) {
                                fprintf(stderr, "line %d: %s: bad %s\n",
                                    lineno, tp, cp);
                                errors++;
                        } else {
                                lp->d_pbase = vv;
                        }
                        continue;
                }
                if (streq(cp, "partitions data stop")) {
                        vv = strtoull(tp, NULL, 0);
                        if (vv == 0 || vv == (uint64_t)-1) {
                                fprintf(stderr, "line %d: %s: bad %s\n",
                                    lineno, tp, cp);
                                errors++;
                        } else {
                                lp->d_pstop = vv;
                        }
                        continue;
                }
                if (streq(cp, "backup label")) {
                        vv = strtoull(tp, NULL, 0);
                        if (vv == 0 || vv == (uint64_t)-1) {
                                fprintf(stderr, "line %d: %s: bad %s\n",
                                    lineno, tp, cp);
                                errors++;
                        } else {
                                lp->d_abase = vv;
                        }
                        continue;
                }
                if (streq(cp, "display block size")) {
                        v = strtoul(tp, NULL, 0);
                        if (v <= 0 || (v & DEV_BMASK) != 0 || v > 1024*1024) {
                                fprintf(stderr, "line %d: %s: bad %s\n",
                                    lineno, tp, cp);
                                errors++;
                        } else {
                                blksize = v;
                        }
                        continue;
                }

                /* the ':' was removed above */

                /*
                 * Handle main partition data, e.g. a:, b:, etc.
                 */
                if (*cp < 'a' || *cp > MAX_PART) {
                        fprintf(stderr,
                            "line %d: %s: Unknown disklabel field\n", lineno,
                            cp);
                        errors++;
                        continue;
                }

                /* Process a partition specification line. */
                part = *cp - 'a';
                if (part >= lp->d_npartitions) {
                        fprintf(stderr,
                            "line %d: partition name out of range a-%c: %s\n",
                            lineno, 'a' + lp->d_npartitions - 1, cp);
                        errors++;
                        continue;
                }

                if (blksize == 0) {
                        fprintf(stderr, "block size to use for partition "
                                        "display was not specified!\n");
                        errors++;
                        continue;
                }

                if (strcmp(cp + 1, "-stor_uuid") == 0) {
                        if (getasciipartuuid(tp, lp, part, lineno, blksize)) {
                                errors++;
                                break;
                        }
                        continue;
                } else if (cp[1] == 0) {
                        part_set[part] = 1;
                        if (getasciipartspec(tp, lp, part, lineno, blksize)) {
                                errors++;
                                break;
                        }
                        continue;
                }
                fprintf(stderr, "line %d: %s: Unknown disklabel field\n",
                        lineno, cp);
                errors++;
                continue;
        }
        errors += checklabel(lp);
        return (errors == 0);
}

static int
parse_field_val(char **tp, char **cp, u_int64_t *vv, int lineno)
{
        char *tmp;

        if (*tp == NULL || **tp == 0) {
                fprintf(stderr, "line %d: too few numeric fields\n", lineno);
                return(-1);
        }
        *cp = *tp;
        *tp = word(*cp);
        *vv = strtoull(*cp, &tmp, 0);
        if (*vv == ULLONG_MAX) {
                fprintf(stderr, "line %d: illegal number\n", lineno);
                return(-1);
        }
        if (tmp)
                return(*tmp);
        else
                return(0);
}

/*
 * Read a partition line into partition `part' in the specified disklabel.
 * Return 0 on success, 1 on failure.
 */
static int
getasciipartspec(char *tp, struct disklabel64 *lp, int part,
                 int lineno, uint32_t blksize)
{
        struct partition64 *pp;
        char *cp;
        const char **cpp;
        int r;
        u_long v;
        uint64_t vv;
        uint64_t mpx;

        pp = &lp->d_partitions[part];
        cp = NULL;

        /*
         * size
         */
        r = parse_field_val(&tp, &cp, &vv, lineno);
        if (r < 0)
                return (1);

        mpx = 1;
        switch(r) {
        case 0:
                mpx = blksize;
                break;
        case '%':
                /* mpx = 1; */
                break;
        case '*':
                mpx = 0;
                break;
        case 't':
        case 'T':
                mpx *= 1024ULL;
                /* fall through */
        case 'g':
        case 'G':
                mpx *= 1024ULL;
                /* fall through */
        case 'm':
        case 'M':
                mpx *= 1024ULL;
                /* fall through */
        case 'k':
        case 'K':
                mpx *= 1024ULL;
                r = 0;                  /* eat the suffix */
                break;
        default:
                Warning("unknown size specifier '%c' (*/%%/K/M/G/T are valid)",
                        r);
                return(1);
        }

        part_size_type[part] = r;
        if (vv == 0 && r != '*') {
                fprintf(stderr,
                    "line %d: %s: bad partition size (0)\n", lineno, cp);
                return (1);
        }
        pp->p_bsize = vv * mpx;

        /*
         * offset
         */
        r = parse_field_val(&tp, &cp, &vv, lineno);
        if (r < 0)
                return (1);
        part_offset_type[part] = r;
        switch(r) {
        case '*':
                pp->p_boffset = 0;
                break;
        case 0:
                pp->p_boffset = vv * blksize + lp->d_pbase;
                break;
        default:
                fprintf(stderr,
                    "line %d: %s: bad suffix on partition offset (%c)\n",
                    lineno, cp, r);
                return (1);
        }

        /*
         * fstype
         */
        if (tp == NULL) {
                fprintf(stderr,
                    "line %d: no filesystem type was specified\n", lineno);
                return(1);
        }
        cp = tp;
        tp = word(cp);
        for (cpp = fstypenames; cpp < &fstypenames[FSMAXTYPES]; cpp++) {
                if (*cpp && strcasecmp(*cpp, cp) == 0)
                        break;
        }
        if (*cpp != NULL) {
                pp->p_fstype = cpp - fstypenames;
        } else {
                if (isdigit(*cp))
                        v = strtoul(cp, NULL, 0);
                else
                        v = FSMAXTYPES;
                if (v >= FSMAXTYPES) {
                        fprintf(stderr,
                            "line %d: Warning, unknown filesystem type %s\n",
                            lineno, cp);
                        v = FS_UNUSED;
                }
                pp->p_fstype = v;
        }

        cp = tp;
        if (tp) {
                fprintf(stderr, "line %d: Warning, extra data on line\n",
                        lineno);
        }
        return(0);
}

static int
getasciipartuuid(char *tp, struct disklabel64 *lp, int part,
                 int lineno, uint32_t blksize __unused)
{
        struct partition64 *pp;
        uint32_t status;
        char *cp;

        pp = &lp->d_partitions[part];

        cp = tp;
        tp = word(cp);
        uuid_from_string(cp, &pp->p_stor_uuid, &status);
        if (status != uuid_s_ok) {
                fprintf(stderr, "line %d: Illegal storage uuid specification\n",
                        lineno);
                return(1);
        }
        return(0);
}

/*
 * Check disklabel for errors and fill in
 * derived fields according to supplied values.
 */
static int
checklabel(struct disklabel64 *lp)
{
        struct partition64 *pp;
        int errors = 0;
        char part;
        u_int64_t total_size;
        u_int64_t current_offset;
        u_long total_percent;
        int seen_default_offset;
        int hog_part;
        int i, j;
        struct partition64 *pp2;
        u_int64_t off;

        if (lp->d_align < 512 ||
            (lp->d_align ^ (lp->d_align - 1)) != lp->d_align * 2 - 1) {
                Warning("Illegal alignment specified: %u\n", lp->d_align);
                return (1);
        }
        if (lp->d_npartitions > MAXPARTITIONS64) {
                Warning("number of partitions (%u) > MAXPARTITIONS (%d)",
                        lp->d_npartitions, MAXPARTITIONS64);
                return (1);
        }
        off = offsetof(struct disklabel64, d_partitions[lp->d_npartitions]);
        off = (off + lp->d_align - 1) & ~(int64_t)(lp->d_align - 1);

        if (lp->d_bbase < off || lp->d_bbase % lp->d_align) {
                Warning("illegal boot2 data base ");
                return (1);
        }

        /*
         * pbase can be unaligned slice-relative but will be
         * aligned physically.
         */
        if (lp->d_pbase < lp->d_bbase) {
                Warning("illegal partition data base");
                return (1);
        }
        if (lp->d_pstop < lp->d_pbase) {
                Warning("illegal partition data stop");
                return (1);
        }
        if (lp->d_pstop > lp->d_total_size) {
                printf("%012jx\n%012jx\n",
                        (uintmax_t)lp->d_pstop, (uintmax_t)lp->d_total_size);
                Warning("disklabel control info is beyond the total size");
                return (1);
        }
        if (lp->d_abase &&
            (lp->d_abase < lp->d_pstop ||
             lp->d_abase > lp->d_total_size - off)) {
                Warning("illegal backup label location");
                return (1);
        }

        /* first allocate space to the partitions, then offsets */
        total_size = 0;         /* in bytes */
        total_percent = 0;      /* in percent */
        hog_part = -1;
        /* find all fixed partitions */
        for (i = 0; i < (int)lp->d_npartitions; i++) {
                pp = &lp->d_partitions[i];
                if (part_set[i]) {
                        if (part_size_type[i] == '*') {
                                if (part_offset_type[i] != '*') {
                                        if (total_size < pp->p_boffset)
                                                total_size = pp->p_boffset;
                                }
                                if (hog_part != -1) {
                                        Warning("Too many '*' partitions (%c and %c)",
                                            hog_part + 'a',i + 'a');
                                } else {
                                        hog_part = i;
                                }
                        } else {
                                off_t size;

                                size = pp->p_bsize;
                                if (part_size_type[i] == '%') {
                                        /*
                                         * don't count %'s yet
                                         */
                                        total_percent += size;
                                } else {
                                        /*
                                         * Value has already been converted
                                         * to bytes.
                                         */
                                        if (size % lp->d_align != 0) {
                                                Warning("partition %c's size is not properly aligned",
                                                        i + 'a');
                                        }
                                        total_size += size;
                                }
                        }
                }
        }
        /* handle % partitions - note %'s don't need to add up to 100! */
        if (total_percent != 0) {
                int64_t free_space;
                int64_t space_left;

                free_space = (int64_t)(lp->d_pstop - lp->d_pbase - total_size);
                free_space &= ~(u_int64_t)(lp->d_align - 1);

                space_left = free_space;
                if (total_percent > 100) {
                        fprintf(stderr,"total percentage %lu is greater than 100\n",
                            total_percent);
                        errors++;
                }

                if (free_space > 0) {
                        for (i = 0; i < (int)lp->d_npartitions; i++) {
                                pp = &lp->d_partitions[i];
                                if (part_set[i] && part_size_type[i] == '%') {
                                        /* careful of overflows! and integer roundoff */
                                        pp->p_bsize = ((double)pp->p_bsize/100) * free_space;
                                        pp->p_bsize = (pp->p_bsize + lp->d_align - 1) & ~(u_int64_t)(lp->d_align - 1);
                                        if ((int64_t)pp->p_bsize > space_left)
                                                pp->p_bsize = (u_int64_t)space_left;
                                        total_size += pp->p_bsize;
                                        space_left -= pp->p_bsize;
                                }
                        }
                } else {
                        fprintf(stderr, "%jd bytes available to give to "
                                        "'*' and '%%' partitions\n",
                                (intmax_t)free_space);
                        errors++;
                        /* fix?  set all % partitions to size 0? */
                }
        }
        /* give anything remaining to the hog partition */
        if (hog_part != -1) {
                off = lp->d_pstop - lp->d_pbase - total_size;
                off &= ~(u_int64_t)(lp->d_align - 1);
                lp->d_partitions[hog_part].p_bsize = off;
                total_size = lp->d_pstop - lp->d_pbase;
        }

        /* Now set the offsets for each partition */
        current_offset = lp->d_pbase;
        seen_default_offset = 0;
        for (i = 0; i < (int)lp->d_npartitions; i++) {
                part = 'a' + i;
                pp = &lp->d_partitions[i];
                if (pp->p_bsize == 0)
                        continue;
                if (part_set[i]) {
                        if (part_offset_type[i] == '*') {
                                pp->p_boffset = current_offset;
                                seen_default_offset = 1;
                        } else {
                                /* allow them to be out of order for old-style tables */
                                if (pp->p_boffset < current_offset &&
                                    seen_default_offset &&
                                    pp->p_fstype != FS_VINUM) {
                                        fprintf(stderr,
"Offset 0x%012jx for partition %c overlaps previous partition which ends at 0x%012jx\n",
                                            (uintmax_t)pp->p_boffset,
                                            i + 'a',
                                            (uintmax_t)current_offset);
                                        fprintf(stderr,
"Labels with any *'s for offset must be in ascending order by sector\n");
                                        errors++;
                                } else if (pp->p_boffset != current_offset &&
                                           seen_default_offset) {
                                        /*
                                         * this may give unneeded warnings if
                                         * partitions are out-of-order
                                         */
                                        Warning(
"Offset 0x%012jx for partition %c doesn't match expected value 0x%012jx",
                                            pp->p_boffset, i + 'a',
                                            (intmax_t)current_offset);
                                }
                        }
                        current_offset = pp->p_boffset + pp->p_bsize;
                }
        }

        for (i = 0; i < (int)lp->d_npartitions; i++) {
                part = 'a' + i;
                pp = &lp->d_partitions[i];
                if (pp->p_bsize == 0 && pp->p_boffset != 0)
                        Warning("partition %c: size 0, but offset 0x%012jx",
                                part, (intmax_t)pp->p_boffset);
                if (pp->p_bsize == 0) {
                        pp->p_boffset = 0;
                        continue;
                }
                if (uuid_is_nil(&pp->p_stor_uuid, NULL))
                        uuid_create(&pp->p_stor_uuid, NULL);

                if (pp->p_boffset < lp->d_pbase) {
                        fprintf(stderr,
                            "partition %c: offset out of bounds (%jd)\n",
                            part, (intmax_t)(pp->p_boffset - lp->d_pbase));
                        errors++;
                }
                if (pp->p_boffset > lp->d_pstop) {
                        fprintf(stderr,
                            "partition %c: offset out of bounds (%jd)\n",
                            part, (intmax_t)(pp->p_boffset - lp->d_pbase));
                        errors++;
                }
                if (pp->p_boffset + pp->p_bsize > lp->d_pstop) {
                        fprintf(stderr,
                            "partition %c: size out of bounds (%jd)\n",
                            part, (intmax_t)(pp->p_boffset - lp->d_pbase));
                        errors++;
                }

                /* check for overlaps */
                /* this will check for all possible overlaps once and only once */
                for (j = 0; j < i; j++) {
                        pp2 = &lp->d_partitions[j];
                        if (pp->p_fstype != FS_VINUM &&
                            pp2->p_fstype != FS_VINUM &&
                            part_set[i] && part_set[j]) {
                                if (pp2->p_boffset < pp->p_boffset + pp->p_bsize &&
                                    (pp2->p_boffset + pp2->p_bsize > pp->p_boffset ||
                                        pp2->p_boffset >= pp->p_boffset)) {
                                        fprintf(stderr,"partitions %c and %c overlap!\n",
                                            j + 'a', i + 'a');
                                        errors++;
                                }
                        }
                }
        }
        for (; i < (int)lp->d_npartitions; i++) {
                part = 'a' + i;
                pp = &lp->d_partitions[i];
                if (pp->p_bsize || pp->p_boffset)
                        Warning("unused partition %c: size 0x%012jx "
                                "offset 0x%012jx",
                                'a' + i, (intmax_t)pp->p_bsize,
                                (intmax_t)pp->p_boffset);
        }
        return (errors);
}

static int
expandlabel(int f, struct disklabel64 *lp, int *wbackp)
{
        const uint64_t onemeg = 1024 * 1024;
        uint64_t pstop;
        uint64_t abase;
        uint64_t tsize;
        uint64_t bsize;
        struct partinfo info;
        struct partition64 *part;
        struct partition64 *best;
        struct stat st;
        uint32_t n;

        if (ioctl(f, DIOCGPART, &info) == 0) {
                st.st_size = info.media_size;
        } else if (fstat(f, &st) == 0) {
                ;
        } else {
                fprintf(stderr, "disklabel64: cannot ioctl/stat device\n");
                return EINVAL;
        }
        abase = st.st_size - 4096;
        pstop = abase & ~(onemeg - 1);
        tsize = st.st_size;

        printf("partitions data stop:  %ld -> %ld\n", lp->d_pstop, pstop);
        printf("backup label:          %ld -> %ld\n", lp->d_abase, abase);
        printf("total size:            %ld -> %ld\n", lp->d_total_size, tsize);

        /*
         * This directive does not shrink disklabels!!!
         */
        if (lp->d_pstop > pstop ||
            lp->d_abase > abase ||
            lp->d_total_size > tsize) {
                fprintf(stderr, "disklabel64: cannot expand "
                                "disklabel because it would "
                                "shrink!\n");
                return 1;
        }


        if (lp->d_pstop == pstop &&
            lp->d_abase == abase &&
            lp->d_total_size == tsize) {
                printf("disklabel64: expand: "
                       "no change in disklabel "
                       "size\n");
        } else {
                lp->d_pstop = pstop;
                lp->d_abase = abase;
                lp->d_total_size = tsize;
                *wbackp = 1;
        }

        /*
         * Resize the last partition
         */
        if (expandopt > 1) {
                best = NULL;
                for (n = 0; n < lp->d_npartitions; ++n) {
                        part = &lp->d_partitions[n];
                        if (best == NULL || best->p_boffset < part->p_boffset)
                                best = part;
                }
                if (best) {
                        bsize = lp->d_pstop - best->p_boffset;
                        if (best->p_bsize > bsize) {
                                printf("disklabel64: cannot expand "
                                       "partition because it would "
                                       "shrink!\n");
                                return 1;
                        } else if (best->p_bsize == bsize) {
                                printf("disklabel64: expand: "
                                       "no change in partition "
                                       "size\n");
                        } else {
                                printf("disklabel64: expand: increase part "
                                       "%ld to %ld bytes\n",
                                       best->p_bsize,
                                       bsize);
                                best->p_bsize = bsize;
                                *wbackp = 1;
                        }
                }
        }

        return 0;
}

/*
 * When operating on a "virgin" disk, try getting an initial label
 * from the associated device driver.  This might work for all device
 * drivers that are able to fetch some initial device parameters
 * without even having access to a (BSD) disklabel, like SCSI disks,
 * most IDE drives, or vn devices.
 *
 * The device name must be given in its "canonical" form.
 */
static struct disklabel64 dlab;

static struct disklabel64 *
getvirginlabel(void)
{
        struct disklabel64 *dl = &dlab;
        int f;

        if ((f = open(dkname, O_RDONLY)) == -1) {
                warn("cannot open %s", dkname);
                return (NULL);
        }

        /*
         * Generate a virgin disklabel via ioctl
         */
        if (ioctl(f, DIOCGDVIRGIN64, dl) < 0) {
                l_perror("ioctl DIOCGDVIRGIN64");
                close(f);
                return (NULL);
        }
        close(f);
        return (dl);
}

/*VARARGS1*/
static void
Warning(const char *fmt, ...)
{
        va_list ap;

        fprintf(stderr, "Warning, ");
        va_start(ap, fmt);
        vfprintf(stderr, fmt, ap);
        fprintf(stderr, "\n");
        va_end(ap);
}

static void
usage(void)
{
        fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
                "usage: disklabel64 [-r] disk",
                "\t\t(to read label)",
                "       disklabel64 -w [-r] [-n] disk [type [packid]]",
                "\t\t(to write label with existing boot program)",
                "       disklabel64 -e [-r] [-n] disk",
                "\t\t(to edit label)",
                "       disklabel64 -R [-r] [-n] disk protofile",
                "\t\t(to restore label with existing boot program)",
                "       disklabel64 -B [-n] [-b boot1 -s boot2] disk [type]",
                "\t\t(to install boot program with existing label)",
                "       disklabel64 -w -B [-n] [-b boot1 -s boot2] disk [type [packid]]",
                "\t\t(to write label and boot program)",
                "       disklabel64 -R -B [-n] [-b boot1 -s boot2] disk protofile [type]",
                "\t\t(to restore label and boot program)",
                "       disklabel64 [-NW] disk",
                "\t\t(to write disable/enable label)");
        exit(1);
}