/*
 * 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.
 *
 * @(#) Copyright (c) 1987, 1993 The Regents of the University of California.  All rights reserved.
 * @(#)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/disklabel32.h>
#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 <ctype.h>
#include <err.h>
#include <errno.h>
#include "pathnames.h"

/*
 * Disklabel32: read and write 32 bit disklabels.
 * The label is usually placed on one of the first sectors of the disk.
 * Many machines also place a bootstrap in the same area,
 * in which case the label is embedded in the bootstrap.
 * The bootstrap source must leave space at the proper offset
 * for the label on such machines.
 */

#ifndef BBSIZE
#define BBSIZE  8192                    /* size of boot area, with label */
#endif

/* FIX!  These are too low, but are traditional */
#define DEFAULT_NEWFS_BLOCK  8192U
#define DEFAULT_NEWFS_FRAG   1024U
#define DEFAULT_NEWFS_CPG    16U

#define BIG_NEWFS_BLOCK  16384U
#define BIG_NEWFS_FRAG   2048U
#define BIG_NEWFS_CPG    64U

#define NUMBOOT 2

void    makelabel(const char *, const char *, struct disklabel32 *);
int     writelabel(int, const char *, struct disklabel32 *);
void    l_perror(const char *);
struct disklabel32 *readlabel(int);
struct disklabel32 *makebootarea(char *, struct disklabel32 *, int);
void    display(FILE *, const struct disklabel32 *);
int     edit(struct disklabel32 *, int);
int     editit(void);
char    *skip(char *);
char    *word(char *);
int     getasciilabel(FILE *, struct disklabel32 *);
int     getasciipartspec(char *, struct disklabel32 *, int, int);
int     checklabel(struct disklabel32 *);
void    setbootflag(struct disklabel32 *);
void    Warning(const char *, ...) __printflike(1, 2);
void    usage(void) __dead2;
int     checkoldboot(int, const char *);
const char *fixlabel(int, struct disklabel32 *, int);
struct disklabel32 *getvirginlabel(void);
struct disklabel32 *getdisklabelfromdisktab(const char *name);

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

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

char    namebuf[BBSIZE];
struct  disklabel32 lab;
char    bootarea[BBSIZE];

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

#if NUMBOOT > 0
int     installboot;    /* non-zero if we should install a boot program */
char    *bootbuf;       /* pointer to buffer with remainder of boot prog */
int     bootsize;       /* size of remaining boot program */
char    *xxboot;        /* primary boot */
char    *bootxx;        /* secondary boot */
char    boot0[MAXPATHLEN];
char    boot1[MAXPATHLEN];
#endif

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

int     rflag;
int     disable_write;   /* set to disable writing to disk label */
int     forceflag;
u_int32_t slice_start_lba;

#ifdef DEBUG
int     debug;
#define OPTIONS "BNRWb:def:nrs:w"
#else
#define OPTIONS "BNRWb:ef:nrs:w"
#endif

int
main(int argc, char *argv[])
{
        struct disklabel32 *lp;
        FILE *t;
        int ch, f = 0, flag, error = 0;
        char *name = NULL;

        while ((ch = getopt(argc, argv, OPTIONS)) != -1)
                switch (ch) {
#if NUMBOOT > 0
                        case 'B':
                                ++installboot;
                                break;
                        case 'b':
                                xxboot = optarg;
                                break;

                        case 'f':
                                forceflag = 1;
                                slice_start_lba = strtoul(optarg, NULL, 0);
                                break;
#if NUMBOOT > 1
                        case 's':
                                bootxx = optarg;
                                break;
#endif
#endif
                        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 'r':
                                ++rflag;
                                break;
                        case 'w':
                                if (op != UNSPEC)
                                        usage();
                                op = WRITE;
                                break;
#ifdef DEBUG
                        case 'd':
                                debug++;
                                break;
#endif
                        case '?':
                        default:
                                usage();
                }
        argc -= optind;
        argv += optind;
#if NUMBOOT > 0
        if (installboot) {
                rflag++;
                if (op == UNSPEC)
                        op = WRITEBOOT;
        } else {
                if (op == UNSPEC)
                        op = READ;
                xxboot = bootxx = NULL;
        }
#else
        if (op == UNSPEC)
                op = READ;
#endif
        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);
                if (checkoldboot(f, NULL))
                        warnx("Warning, old bootblocks detected, install new bootblocks & reinstall the disklabel");
                break;

        case RESTORE:
#if NUMBOOT > 0
                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));
                }
#endif
                if (argc != 2)
                        usage();
                if (!(t = fopen(argv[1], "r")))
                        err(4, "%s", argv[1]);
                if (!getasciilabel(t, &lab))
                        exit(1);
                lp = makebootarea(bootarea, &lab, f);
                *lp = lab;
                error = writelabel(f, bootarea, lp);
                break;

        case WRITE:
                if (argc == 3) {
                        name = argv[2];
                        argc--;
                }
                if (argc != 2)
                        usage();
                makelabel(argv[1], name, &lab);
                lp = makebootarea(bootarea, &lab, f);
                *lp = lab;
                if (checklabel(lp) == 0)
                        error = writelabel(f, bootarea, lp);
                break;

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

#if NUMBOOT > 0
        case WRITEBOOT:
        {
                struct disklabel32 tlab;

                lp = readlabel(f);
                tlab = *lp;
                if (argc == 2)
                        makelabel(argv[1], 0, &lab);
                lp = makebootarea(bootarea, &lab, f);
                *lp = tlab;
                if (checklabel(lp) == 0)
                        error = writelabel(f, bootarea, lp);
                break;
        }
#endif
        }
        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.
 */
void
makelabel(const char *type, const char *name, struct disklabel32 *lp)
{
        struct disklabel32 *dp;

        if (strcmp(type, "auto") == 0)
                dp = getvirginlabel();
        else
                dp = getdisklabelfromdisktab(type);
        if (dp == NULL)
                errx(1, "%s: unknown disk type", type);
        *lp = *dp;

        /*
         * NOTE: boot control files may no longer be specified in disktab.
         */
        if (name)
                strncpy(lp->d_packname, name, sizeof(lp->d_packname));
}

int
writelabel(int f, const char *boot, struct disklabel32 *lp)
{
        const char *msg;
        int flag;
        int r;

        if (disable_write) {
                Warning("write to disk label suppressed - label was as follows:");
                display(stdout, lp);
                return (0);
        } else {
                /* make sure we are not overwriting our boot code */
                if (checkoldboot(f, boot))
                        errx(4, "Will not overwrite old bootblocks w/ label, install new boot blocks first!");
                setbootflag(lp);
                lp->d_magic = DISKMAGIC32;
                lp->d_magic2 = DISKMAGIC32;
                lp->d_checksum = 0;
                lp->d_checksum = dkcksum32(lp);
                if (rflag) {
                        /*
                         * 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, DIOCSDINFO32, lp) < 0 &&
                                errno != ENODEV && errno != ENOTTY) {
                                l_perror("ioctl DIOCSDINFO32");
                                return (1);
                        }
                        lseek(f, (off_t)0, SEEK_SET);

                        /*
                         * write enable label sector before write
                         * (if necessary), disable after writing.
                         */
                        flag = 1;
                        if (ioctl(f, DIOCWLABEL, &flag) < 0)
                                warn("ioctl DIOCWLABEL");
                        msg = fixlabel(f, lp, 1);
                        if (msg) {
                                warn("%s", msg);
                                return (1);
                        }
                        r = write(f, boot, lp->d_bbsize);
                        fixlabel(f, lp, 0);
                        if (r != ((ssize_t)lp->d_bbsize)) {
                                warn("write");
                                return (1);
                        }
#if NUMBOOT > 0
                        /*
                         * Output the remainder of the disklabel
                         */
                        if (bootbuf) {
                                fixlabel(f, lp, 1);
                                r = write(f, bootbuf, bootsize);
                                fixlabel(f, lp, 0);
                                if (r != bootsize) {
                                        warn("write");
                                        return(1);
                                }
                        }
#endif
                        flag = 0;
                        ioctl(f, DIOCWLABEL, &flag);
                } else if (ioctl(f, DIOCWDINFO32, lp) < 0) {
                        l_perror("ioctl DIOCWDINFO32");
                        return (1);
                }
        }
        return (0);
}

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 EXDEV:
                warnx("%s: '%c' partition must start at beginning of disk",
                    s, 'a' + RAW_PART);
                break;

        case ENOATTR:
                warnx("%s: the disk already has a label of a different type,\n"
                      "probably a 64 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.
 */
struct disklabel32 *
readlabel(int f)
{
        const char *msg;
        struct disklabel32 *lp;
        int r;

        if (rflag) {
                r = read(f, bootarea, BBSIZE);
                if (r < BBSIZE)
                        err(4, "%s", specname);
                for (lp = (struct disklabel32 *)bootarea;
                    lp <= (struct disklabel32 *)(bootarea + BBSIZE - sizeof(*lp));
                    lp = (struct disklabel32 *)((char *)lp + 16)) {
                        if (lp->d_magic == DISKMAGIC32 &&
                            lp->d_magic2 == DISKMAGIC32)
                                break;
                }
                if (lp > (struct disklabel32 *)(bootarea+BBSIZE-sizeof(*lp)) ||
                    lp->d_magic != DISKMAGIC32 || lp->d_magic2 != DISKMAGIC32 ||
                    dkcksum32(lp) != 0) {
                        errx(1, "bad pack magic number (label is damaged, "
                                "or pack is unlabeled)");
                }
                if ((msg = fixlabel(f, lp, 0)) != NULL)
                        errx(1, "%s", msg);
        } else {
                lp = &lab;
                if (ioctl(f, DIOCGDINFO32, lp) < 0) {
                        l_perror("ioctl DIOCGDINFO32");
                        exit(4);
                }
        }
        return (lp);
}

/*
 * Construct a bootarea (d_bbsize bytes) in the specified buffer ``boot''
 * Returns a pointer to the disklabel portion of the bootarea.
 */
struct disklabel32 *
makebootarea(char *boot, struct disklabel32 *dp, int f)
{
        struct disklabel32 *lp;
        char *p;
        int b;
#if NUMBOOT > 0
        struct stat sb;
#endif

        /* XXX */
        if (dp->d_secsize == 0) {
                dp->d_secsize = DEV_BSIZE;
                dp->d_bbsize = BBSIZE;
        }
        lp = (struct disklabel32 *)
                (boot + (LABELSECTOR32 * dp->d_secsize) + LABELOFFSET32);
        bzero((char *)lp, sizeof *lp);
#if NUMBOOT > 0
        /*
         * If we are not installing a boot program but we are installing a
         * label on disk then we must read the current bootarea so we don't
         * clobber the existing boot.
         */
        if (!installboot) {
                if (rflag) {
                        if (read(f, boot, BBSIZE) < BBSIZE)
                                err(4, "%s", specname);
                        bzero((char *)lp, sizeof *lp);
                }
                return (lp);
        }
        /*
         * We are installing a boot program.  Determine the name(s) and
         * read them into the appropriate places in the boot area.
         */
        if (!xxboot || !bootxx) {
                if (!xxboot) {
                        sprintf(boot0, "%s/boot1", _PATH_BOOTDIR);
                        xxboot = boot0;
                }
#if NUMBOOT > 1
                if (!bootxx) {
                        sprintf(boot1, "%s/boot2", _PATH_BOOTDIR);
                        bootxx = boot1;
                }
#endif
        }
#ifdef DEBUG
        if (debug)
                fprintf(stderr, "bootstraps: xxboot = %s, bootxx = %s\n",
                        xxboot, bootxx ? bootxx : "NONE");
#endif

        /*
         * Strange rules:
         * 1. One-piece bootstrap (hp300/hp800)
         *      up to d_bbsize bytes of ``xxboot'' go in bootarea, the rest
         *      is remembered and written later following the bootarea.
         * 2. Two-piece bootstraps (vax/i386?/mips?)
         *      up to d_secsize bytes of ``xxboot'' go in first d_secsize
         *      bytes of bootarea, remaining d_bbsize-d_secsize filled
         *      from ``bootxx''.
         */
        b = open(xxboot, O_RDONLY);
        if (b < 0)
                err(4, "%s", xxboot);
#if NUMBOOT > 1
        if (read(b, boot, (int)dp->d_secsize) < 0)
                err(4, "%s", xxboot);
        close(b);
        b = open(bootxx, O_RDONLY);
        if (b < 0)
                err(4, "%s", bootxx);
        if (fstat(b, &sb) != 0)
                err(4, "%s", bootxx);
        if (dp->d_secsize + sb.st_size > dp->d_bbsize)
                errx(4, "%s too large", bootxx);
        if (read(b, &boot[dp->d_secsize],
                 (int)(dp->d_bbsize-dp->d_secsize)) < 0)
                err(4, "%s", bootxx);
#else /* !(NUMBOOT > 1) */
        if (read(b, boot, (int)dp->d_bbsize) < 0)
                err(4, "%s", xxboot);
        if (fstat(b, &sb) != 0)
                err(4, "%s", xxboot);
        bootsize = (int)sb.st_size - dp->d_bbsize;
        if (bootsize > 0) {
                /* XXX assume d_secsize is a power of two */
                bootsize = roundup2(bootsize, dp->d_secsize);
                bootbuf = (char *)malloc((size_t)bootsize);
                if (bootbuf == NULL)
                        err(4, "%s", xxboot);
                if (read(b, bootbuf, bootsize) < 0) {
                        free(bootbuf);
                        err(4, "%s", xxboot);
                }
        }
#endif /* NUMBOOT > 1 */
        close(b);
#endif /* NUMBOOT > 0 */
        /*
         * Make sure no part of the bootstrap is written in the area
         * reserved for the label.
         */
        for (p = (char *)lp; p < (char *)lp + sizeof(struct disklabel32); p++)
                if (*p)
                        errx(2, "bootstrap doesn't leave room for disk label");
        return (lp);
}

void
display(FILE *f, const struct disklabel32 *lp)
{
        int i, j;
        const struct partition32 *pp;

        fprintf(f, "# %s:\n", specname);
        if (lp->d_type < DKMAXTYPES)
                fprintf(f, "type: %s\n", dktypenames[lp->d_type]);
        else
                fprintf(f, "type: %u\n", lp->d_type);
        fprintf(f, "disk: %.*s\n", (int)sizeof(lp->d_typename),
                lp->d_typename);
        fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname),
                lp->d_packname);
        fprintf(f, "flags:");
        fprintf(f, "\n");
        fprintf(f, "bytes/sector: %lu\n", (u_long)lp->d_secsize);
        fprintf(f, "sectors/track: %lu\n", (u_long)lp->d_nsectors);
        fprintf(f, "tracks/cylinder: %lu\n", (u_long)lp->d_ntracks);
        fprintf(f, "sectors/cylinder: %lu\n", (u_long)lp->d_secpercyl);
        fprintf(f, "cylinders: %lu\n", (u_long)lp->d_ncylinders);
        fprintf(f, "sectors/unit: %lu\n", (u_long)lp->d_secperunit);
        fprintf(f, "rpm: %u\n", lp->d_rpm);
        fprintf(f, "interleave: %u\n", lp->d_interleave);
        fprintf(f, "trackskew: %u\n", lp->d_trackskew);
        fprintf(f, "cylinderskew: %u\n", lp->d_cylskew);
        fprintf(f, "headswitch: %lu\t\t# milliseconds\n",
            (u_long)lp->d_headswitch);
        fprintf(f, "track-to-track seek: %ld\t# milliseconds\n",
            (u_long)lp->d_trkseek);
        fprintf(f, "drivedata: ");
        for (i = NDDATA32 - 1; i >= 0; i--) {
                if (lp->d_drivedata[i])
                        break;
        }
        if (i < 0)
                i = 0;
        for (j = 0; j <= i; j++)
                fprintf(f, "%lu ", (u_long)lp->d_drivedata[j]);
        fprintf(f, "\n\n%u partitions:\n", lp->d_npartitions);
        fprintf(f,
            "#          size     offset    fstype\n");
        pp = lp->d_partitions;
        for (i = 0; i < lp->d_npartitions; i++, pp++) {
                if (pp->p_size) {
                        u_long onemeg = 1024 * 1024 / lp->d_secsize;
                        fprintf(f, "  %c: ", 'a' + i);

                        fprintf(f, "%10lu ", (u_long)pp->p_size);
                        fprintf(f, "%10lu  ", (u_long)pp->p_offset);
                        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_size / onemeg);
                        fprintf(f, "\n");
                }
        }
        fflush(f);
}

int
edit(struct disklabel32 *lp, int f)
{
        int c, fd;
        struct disklabel32 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, bootarea, 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);
}

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);
}

char *
skip(char *cp)
{

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

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.
 */
int
getasciilabel(FILE *f, struct disklabel32 *lp)
{
        char *cp;
        const char **cpp;
        u_int part;
        char *tp, line[BUFSIZ];
        u_long v;
        int lineno = 0, errors = 0;
        int i;
        char empty[] = "";
        char unknown[] = "unknown";

        bzero(&part_set, sizeof(part_set));
        bzero(&part_size_type, sizeof(part_size_type));
        bzero(&part_offset_type, sizeof(part_offset_type));
        lp->d_bbsize = BBSIZE;                          /* XXX */
        lp->d_sbsize = SBSIZE;                          /* XXX */
        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 (streq(cp, "type")) {
                        if (tp == NULL)
                                tp = unknown;
                        cpp = dktypenames;
                        for (; cpp < &dktypenames[DKMAXTYPES]; cpp++) {
                                if (*cpp && strcasecmp(*cpp, tp) == 0) {
                                        lp->d_type = cpp - dktypenames;
                                        break;
                                }
                        }
                        if (cpp < &dktypenames[DKMAXTYPES])
                                continue;
                        v = strtoul(tp, NULL, 10);
                        if (v >= DKMAXTYPES) {
                                fprintf(stderr, "line %d:%s %lu\n", lineno,
                                    "Warning, unknown disk type", v);
                        }
                        lp->d_type = v;
                        continue;
                }
                if (streq(cp, "flags")) {
                        for (v = 0; (cp = tp) && *cp != '\0';) {
                                tp = word(cp);
                                if (streq(cp, "removeable"))
                                        v |= 0; /* obsolete */
                                else if (streq(cp, "ecc"))
                                        v |= 0; /* obsolete */
                                else if (streq(cp, "badsect"))
                                        v |= 0; /* obsolete */
                                else {
                                        fprintf(stderr,
                                            "line %d: %s: bad flag\n",
                                            lineno, cp);
                                        errors++;
                                }
                        }
                        lp->d_flags = v;
                        continue;
                }
                if (streq(cp, "drivedata")) {
                        for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA32;) {
                                lp->d_drivedata[i++] = strtoul(cp, NULL, 10);
                                tp = word(cp);
                        }
                        continue;
                }
                if (sscanf(cp, "%lu partitions", &v) == 1) {
                        if (v == 0 || v > MAXPARTITIONS32) {
                                fprintf(stderr,
                                    "line %d: bad # of partitions\n", lineno);
                                lp->d_npartitions = MAXPARTITIONS32;
                                errors++;
                        } else
                                lp->d_npartitions = v;
                        continue;
                }
                if (tp == NULL)
                        tp = empty;
                if (streq(cp, "disk")) {
                        strncpy(lp->d_typename, tp, sizeof (lp->d_typename));
                        continue;
                }
                if (streq(cp, "label")) {
                        strncpy(lp->d_packname, tp, sizeof (lp->d_packname));
                        continue;
                }
                if (streq(cp, "bytes/sector")) {
                        v = strtoul(tp, NULL, 10);
                        if (v == 0 || (v % DEV_BSIZE) != 0) {
                                fprintf(stderr,
                                    "line %d: %s: bad sector size\n",
                                    lineno, tp);
                                errors++;
                        } else
                                lp->d_secsize = v;
                        continue;
                }
                if (streq(cp, "sectors/track")) {
                        v = strtoul(tp, NULL, 10);
#if (ULONG_MAX != 0xffffffffUL)
                        if (v == 0 || v > 0xffffffff) {
#else
                        if (v == 0) {
#endif
                                fprintf(stderr, "line %d: %s: bad %s\n",
                                    lineno, tp, cp);
                                errors++;
                        } else
                                lp->d_nsectors = v;
                        continue;
                }
                if (streq(cp, "sectors/cylinder")) {
                        v = strtoul(tp, NULL, 10);
                        if (v == 0) {
                                fprintf(stderr, "line %d: %s: bad %s\n",
                                    lineno, tp, cp);
                                errors++;
                        } else
                                lp->d_secpercyl = v;
                        continue;
                }
                if (streq(cp, "tracks/cylinder")) {
                        v = strtoul(tp, NULL, 10);
                        if (v == 0) {
                                fprintf(stderr, "line %d: %s: bad %s\n",
                                    lineno, tp, cp);
                                errors++;
                        } else
                                lp->d_ntracks = v;
                        continue;
                }
                if (streq(cp, "cylinders")) {
                        v = strtoul(tp, NULL, 10);
                        if (v == 0) {
                                fprintf(stderr, "line %d: %s: bad %s\n",
                                    lineno, tp, cp);
                                errors++;
                        } else
                                lp->d_ncylinders = v;
                        continue;
                }
                if (streq(cp, "sectors/unit")) {
                        v = strtoul(tp, NULL, 10);
                        if (v == 0) {
                                fprintf(stderr, "line %d: %s: bad %s\n",
                                    lineno, tp, cp);
                                errors++;
                        } else
                                lp->d_secperunit = v;
                        continue;
                }
                if (streq(cp, "rpm")) {
                        v = strtoul(tp, NULL, 10);
                        if (v == 0 || v > USHRT_MAX) {
                                fprintf(stderr, "line %d: %s: bad %s\n",
                                    lineno, tp, cp);
                                errors++;
                        } else
                                lp->d_rpm = v;
                        continue;
                }
                if (streq(cp, "interleave")) {
                        v = strtoul(tp, NULL, 10);
                        if (v == 0 || v > USHRT_MAX) {
                                fprintf(stderr, "line %d: %s: bad %s\n",
                                    lineno, tp, cp);
                                errors++;
                        } else
                                lp->d_interleave = v;
                        continue;
                }
                if (streq(cp, "trackskew")) {
                        v = strtoul(tp, NULL, 10);
                        if (v > USHRT_MAX) {
                                fprintf(stderr, "line %d: %s: bad %s\n",
                                    lineno, tp, cp);
                                errors++;
                        } else
                                lp->d_trackskew = v;
                        continue;
                }
                if (streq(cp, "cylinderskew")) {
                        v = strtoul(tp, NULL, 10);
                        if (v > USHRT_MAX) {
                                fprintf(stderr, "line %d: %s: bad %s\n",
                                    lineno, tp, cp);
                                errors++;
                        } else
                                lp->d_cylskew = v;
                        continue;
                }
                if (streq(cp, "headswitch")) {
                        v = strtoul(tp, NULL, 10);
                        lp->d_headswitch = v;
                        continue;
                }
                if (streq(cp, "track-to-track seek")) {
                        v = strtoul(tp, NULL, 10);
                        lp->d_trkseek = v;
                        continue;
                }
                /* the ':' was removed above */
                if (*cp < 'a' || *cp > MAX_PART || cp[1] != '\0') {
                        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;
                }
                part_set[part] = 1;

                if (getasciipartspec(tp, lp, part, lineno) != 0) {
                        errors++;
                        break;
                }
        }
        errors += checklabel(lp);
        return (errors == 0);
}

#define NXTNUM(n) do { \
        if (tp == NULL) { \
                fprintf(stderr, "line %d: too few numeric fields\n", lineno); \
                return (1); \
        } else { \
                cp = tp, tp = word(cp); \
                (n) = strtoul(cp, NULL, 10); \
        } \
} while (0)

/* retain 1 character following number */
#define NXTWORD(w,n) do { \
        if (tp == NULL) { \
                fprintf(stderr, "line %d: too few numeric fields\n", lineno); \
                return (1); \
        } else { \
                char *tmp; \
                cp = tp, tp = word(cp); \
                (n) = strtoul(cp, &tmp, 10); \
                if (tmp) (w) = *tmp; \
        } \
} while (0)

/*
 * Read a partition line into partition `part' in the specified disklabel.
 * Return 0 on success, 1 on failure.
 */
int
getasciipartspec(char *tp, struct disklabel32 *lp, int part, int lineno)
{
        struct partition32 *pp;
        char *cp;
        const char **cpp;
        u_long v;

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

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

        /*
         * offset
         */
        v = 0;
        NXTWORD(part_offset_type[part],v);
        if (v == 0 && part_offset_type[part] != '*' &&
            part_offset_type[part] != '\0') {
                fprintf(stderr,
                    "line %d: %s: bad partition offset\n", lineno, cp);
                return (1);
        }
        pp->p_offset = v;

        /*
         * 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, 10);
                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;
        }

        pp->p_fsize = 0;
        pp->p_frag = 0;
        pp->p_cpg = 0;

        cp = tp;
        if (tp) {
                fprintf(stderr, "line %d: Warning, fragment, block, "
                                "and bps/cpg fields are no\n"
                                "longer supported and must be specified "
                                "via newfs options instead.\n",
                        lineno);
        }
        return(0);
}

/*
 * Check disklabel for errors and fill in
 * derived fields according to supplied values.
 */
int
checklabel(struct disklabel32 *lp)
{
        struct partition32 *pp;
        int i, errors = 0;
        char part;
        u_long base_offset, needed, total_size, total_percent, current_offset;
        long free_space;
        int seen_default_offset;
        int hog_part;
        int j;
        struct partition32 *pp2;

        if (lp->d_secsize == 0) {
                fprintf(stderr, "sector size 0\n");
                return (1);
        }
        if (lp->d_nsectors == 0) {
                fprintf(stderr, "sectors/track 0\n");
                return (1);
        }
        if (lp->d_ntracks == 0) {
                fprintf(stderr, "tracks/cylinder 0\n");
                return (1);
        }
        if  (lp->d_ncylinders == 0) {
                fprintf(stderr, "cylinders/unit 0\n");
                errors++;
        }
        if (lp->d_rpm == 0)
                Warning("revolutions/minute 0");
        if (lp->d_secpercyl == 0)
                lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks;
        if (lp->d_secperunit == 0)
                lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders;
        if (lp->d_bbsize == 0) {
                fprintf(stderr, "boot block size 0\n");
                errors++;
        } else if (lp->d_bbsize % lp->d_secsize)
                Warning("boot block size %% sector-size != 0");
        if (lp->d_sbsize == 0) {
                fprintf(stderr, "super block size 0\n");
                errors++;
        } else if (lp->d_sbsize % lp->d_secsize)
                Warning("super block size %% sector-size != 0");
        if (lp->d_npartitions > MAXPARTITIONS32)
                Warning("number of partitions (%lu) > MAXPARTITIONS (%d)",
                    (u_long)lp->d_npartitions, MAXPARTITIONS32);

        /* first allocate space to the partitions, then offsets */
        total_size = 0; /* in sectors */
        total_percent = 0; /* in percent */
        hog_part = -1;
        /* find all fixed partitions */
        for (i = 0; i < lp->d_npartitions; i++) {
                pp = &lp->d_partitions[i];
                if (part_set[i]) {

                        if (part_size_type[i] == '*') {
                                if (i == RAW_PART) {
                                        pp->p_size = lp->d_secperunit;
                                } else {
                                        if (part_offset_type[i] != '*') {
                                                if (total_size < pp->p_offset)
                                                        total_size = pp->p_offset;
                                        }
                                        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_size;
                                switch (part_size_type[i]) {
                                case '%':
                                        total_percent += size;
                                        break;
                                case 't':
                                case 'T':
                                        size *= 1024ULL;
                                        /* FALLTHROUGH */
                                case 'g':
                                case 'G':
                                        size *= 1024ULL;
                                        /* FALLTHROUGH */
                                case 'm':
                                case 'M':
                                        size *= 1024ULL;
                                        /* FALLTHROUGH */
                                case 'k':
                                case 'K':
                                        size *= 1024ULL;
                                        break;
                                case '\0':
                                        break;
                                default:
                                        Warning("unknown size specifier '%c' (K/M/G/T are valid)",part_size_type[i]);
                                        break;
                                }
                                /* don't count %'s yet */
                                if (part_size_type[i] != '%') {
                                        /*
                                         * for all not in sectors, convert to
                                         * sectors
                                         */
                                        if (part_size_type[i] != '\0') {
                                                if (size % lp->d_secsize != 0)
                                                        Warning("partition %c not an integer number of sectors",
                                                            i + 'a');
                                                size /= lp->d_secsize;
                                                pp->p_size = size;
                                        }
                                        /* else already in sectors */
                                        if (i != RAW_PART)
                                                total_size += size;
                                }
                        }
                }
        }

        /* Find out the total free space, excluding the boot block area. */
        base_offset = BBSIZE / lp->d_secsize;
        free_space = 0;
        for (i = 0; i < lp->d_npartitions; i++) {
                pp = &lp->d_partitions[i];
                if (!part_set[i] || i == RAW_PART ||
                    part_size_type[i] == '%' || part_size_type[i] == '*')
                        continue;
                if (pp->p_offset > base_offset)
                        free_space += pp->p_offset - base_offset;
                if (pp->p_offset + pp->p_size > base_offset)
                        base_offset = pp->p_offset + pp->p_size;
        }
        if (base_offset < lp->d_secperunit)
                free_space += lp->d_secperunit - base_offset;

        /* handle % partitions - note %'s don't need to add up to 100! */
        if (total_percent != 0) {
                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 < 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_size = ((double)pp->p_size/100) * free_space;
                                        total_size += pp->p_size;

                                        /* FIX we can lose a sector or so due to roundoff per
                                           partition.  A more complex algorithm could avoid that */
                                }
                        }
                } else {
                        fprintf(stderr,
                            "%ld sectors available to give to '*' and '%%' partitions\n",
                            free_space);
                        errors++;
                        /* fix?  set all % partitions to size 0? */
                }
        }
        /* give anything remaining to the hog partition */
        if (hog_part != -1) {
                /*
                 * Find the range of offsets usable by '*' partitions around
                 * the hog partition and how much space they need.
                 */
                needed = 0;
                base_offset = BBSIZE / lp->d_secsize;
                for (i = hog_part - 1; i >= 0; i--) {
                        pp = &lp->d_partitions[i];
                        if (!part_set[i] || i == RAW_PART)
                                continue;
                        if (part_offset_type[i] == '*') {
                                needed += pp->p_size;
                                continue;
                        }
                        base_offset = pp->p_offset + pp->p_size;
                        break;
                }
                current_offset = lp->d_secperunit;
                for (i = lp->d_npartitions - 1; i > hog_part; i--) {
                        pp = &lp->d_partitions[i];
                        if (!part_set[i] || i == RAW_PART)
                                continue;
                        if (part_offset_type[i] == '*') {
                                needed += pp->p_size;
                                continue;
                        }
                        current_offset = pp->p_offset;
                }

                if (current_offset - base_offset <= needed) {
                        fprintf(stderr, "Cannot find space for partition %c\n",
                            hog_part + 'a');
                        fprintf(stderr,
                            "Need more than %lu sectors between %lu and %lu\n",
                            needed, base_offset, current_offset);
                        errors++;
                        lp->d_partitions[hog_part].p_size = 0;
                } else {
                        lp->d_partitions[hog_part].p_size = current_offset -
                            base_offset - needed;
                        total_size += lp->d_partitions[hog_part].p_size;
                }
        }

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

        for (i = 0; i < lp->d_npartitions; i++) {
                part = 'a' + i;
                pp = &lp->d_partitions[i];
                if (pp->p_size == 0 && pp->p_offset != 0)
                        Warning("partition %c: size 0, but offset %lu",
                            part, (u_long)pp->p_offset);
#ifdef notdef
                if (pp->p_size % lp->d_secpercyl)
                        Warning("partition %c: size %% cylinder-size != 0",
                            part);
                if (pp->p_offset % lp->d_secpercyl)
                        Warning("partition %c: offset %% cylinder-size != 0",
                            part);
#endif
                if (pp->p_offset > lp->d_secperunit) {
                        fprintf(stderr,
                            "partition %c: offset past end of unit\n", part);
                        errors++;
                }
                if (pp->p_offset + pp->p_size > lp->d_secperunit) {
                        fprintf(stderr,
                        "partition %c: partition extends past end of unit\n",
                            part);
                        errors++;
                }
                if (i == RAW_PART)
                {
                        if (pp->p_fstype != FS_UNUSED)
                                Warning("partition %c is not marked as unused!",part);
                        if (pp->p_offset != 0)
                                Warning("partition %c doesn't start at 0!",part);
                        if (pp->p_size != lp->d_secperunit)
                                Warning("partition %c doesn't cover the whole unit!",part);

                        if ((pp->p_fstype != FS_UNUSED) || (pp->p_offset != 0) ||
                            (pp->p_size != lp->d_secperunit)) {
                                Warning("An incorrect partition %c may cause problems for "
                                    "standard system utilities",part);
                        }
                }

                /* 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 (j != RAW_PART && i != RAW_PART &&
                            pp->p_fstype != FS_VINUM &&
                            pp2->p_fstype != FS_VINUM &&
                            part_set[i] && part_set[j]) {
                                if (pp2->p_offset < pp->p_offset + pp->p_size &&
                                    (pp2->p_offset + pp2->p_size > pp->p_offset ||
                                        pp2->p_offset >= pp->p_offset)) {
                                        fprintf(stderr,"partitions %c and %c overlap!\n",
                                            j + 'a', i + 'a');
                                        errors++;
                                }
                        }
                }
        }
        for (; i < 8 || i < lp->d_npartitions; i++) {
                part = 'a' + i;
                pp = &lp->d_partitions[i];
                if (pp->p_size || pp->p_offset)
                        Warning("unused partition %c: size %d offset %lu",
                            'a' + i, pp->p_size, (u_long)pp->p_offset);
        }
        return (errors);
}

/*
 * 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.
 */
static struct disklabel32 dlab;

struct disklabel32 *
getvirginlabel(void)
{
        struct partinfo info;
        struct disklabel32 *dl = &dlab;
        int f;

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

        /*
         * Check to see if the media is too big for a 32 bit disklabel.
         */
        if (ioctl(f, DIOCGPART, &info) == 0) {
                 if (info.media_size >= 0x100000000ULL * 512) {
                        warnx("The media is too large for a 32 bit disklabel,"
                              " please use disklabel64.");
                        return (NULL);
                 }
        }

        /*
         * Generate a virgin disklabel via ioctl
         */
        if (ioctl(f, DIOCGDVIRGIN32, dl) < 0) {
                l_perror("ioctl DIOCGDVIRGIN32");
                close(f);
                return(NULL);
        }
        close(f);
        return (dl);
}

struct disklabel32 *
getdisklabelfromdisktab(const char *name)
{
        struct disktab *dt;
        struct disklabel32 *dl = &dlab;
        int i;

        if ((dt = getdisktabbyname(name)) == NULL)
                return(NULL);
        dl->d_magic = DISKMAGIC32;
        dl->d_type = dt->d_typeid;
        dl->d_subtype = 0;
        dl->d_secsize = dt->d_media_blksize;
        dl->d_nsectors = dt->d_secpertrack;
        dl->d_ntracks = dt->d_nheads;
        dl->d_ncylinders = dt->d_ncylinders;
        dl->d_secpercyl = dt->d_secpercyl;
        dl->d_secperunit = dt->d_media_blocks;
        dl->d_rpm = dt->d_rpm;
        dl->d_interleave = dt->d_interleave;
        dl->d_trackskew = dt->d_trackskew;
        dl->d_cylskew = dt->d_cylskew;
        dl->d_headswitch = dt->d_headswitch;
        dl->d_trkseek = dt->d_trkseek;
        dl->d_magic2 = DISKMAGIC32;
        dl->d_npartitions = dt->d_npartitions;
        dl->d_bbsize = dt->d_bbsize;
        dl->d_sbsize = dt->d_sbsize;
        for (i = 0; i < dt->d_npartitions; ++i) {
                struct partition32 *dlp = &dl->d_partitions[i];
                struct dt_partition *dtp = &dt->d_partitions[i];

                dlp->p_size     = dtp->p_size;
                dlp->p_offset   = dtp->p_offset;
                dlp->p_fsize    = dtp->p_fsize;
                dlp->p_fstype   = dtp->p_fstype;
                dlp->p_frag     = dtp->p_fsize;
        }
        return(dl);
}

/*
 * If we are installing a boot program that doesn't fit in d_bbsize
 * we need to mark those partitions that the boot overflows into.
 * This allows newfs to prevent creation of a filesystem where it might
 * clobber bootstrap code.
 */
void
setbootflag(struct disklabel32 *lp)
{
        struct partition32 *pp;
        int i, errors = 0;
        char part;
        u_long boffset;

        if (bootbuf == NULL)
                return;
        boffset = bootsize / lp->d_secsize;
        for (i = 0; i < lp->d_npartitions; i++) {
                part = 'a' + i;
                pp = &lp->d_partitions[i];
                if (pp->p_size == 0)
                        continue;
                if (boffset <= pp->p_offset) {
                        if (pp->p_fstype == FS_BOOT)
                                pp->p_fstype = FS_UNUSED;
                } else if (pp->p_fstype != FS_BOOT) {
                        if (pp->p_fstype != FS_UNUSED) {
                                fprintf(stderr,
                                        "boot overlaps used partition %c\n",
                                        part);
                                errors++;
                        } else {
                                pp->p_fstype = FS_BOOT;
                                Warning("boot overlaps partition %c, %s",
                                        part, "marked as FS_BOOT");
                        }
                }
        }
        if (errors)
                errx(4, "cannot install boot program");
}

/*VARARGS1*/
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);
}

/*
 * Check to see if the bootblocks are in the wrong place.  FBsd5 bootblocks
 * and earlier DFly bb's are packed against the old disklabel and a new
 * disklabel would blow them up.  This is a hack that should be removed
 * in 2006 sometime (if ever).
 */

int
checkoldboot(int f, const char *bootbuffer)
{
        char buf[BBSIZE];

        if (bootbuffer && strncmp(bootbuffer + 0x402, "BTX", 3) == 0)
                return(0);
        lseek(f, (off_t)0, SEEK_SET);
        if (read(f, buf, sizeof(buf)) != sizeof(buf))
                return(0);
        if (strncmp(buf + 0x402, "BTX", 3) == 0)  /* new location */
                return(0);
        if (strncmp(buf + 0x316, "BTX", 3) == 0)  /* old location */
                return(1);
        return(0);
}

/*
 * Traditional 32 bit disklabels actually use absolute sector numbers on
 * disk, NOT slice relative sector numbres.   The OS hides this from us
 * when we use DIOC ioctls to access the label, but newer versions of
 * Dragonfly no longer adjusts the disklabel when snooping reads or writes
 * so we have to figure it out ourselves.
 */
const char *
fixlabel(int f, struct disklabel32 *lp, int writeadj)
{
        const char *msg = NULL;
        struct partinfo info;
        struct partition32 *pp;
        u_int64_t start;
        u_int64_t end;
        u_int64_t offset;
        int part;
        int rev;
        size_t rev_len = sizeof(rev);

        if (sysctlbyname("kern.osrevision", &rev, &rev_len, NULL, 0) < 0) {
                errx(1, "Cannot use raw mode on non-DragonFly systems\n");
        }
        if (rev < 200701) {
                warnx("Warning running new disklabel on old DragonFly systems,\n"
                      "assuming the disk layer will fixup the label.\n");
                sleep(3);
                return(NULL);
        }

        pp = &lp->d_partitions[RAW_PART];

        if (forceflag) {
                info.media_offset = slice_start_lba * lp->d_secsize;
                info.media_blocks = pp->p_size;
                info.media_blksize = lp->d_secsize;
        } else if (ioctl(f, DIOCGPART, &info) < 0) {
                msg = "Unable to extract the slice starting LBA, "
                      "you must use the -f <slice_start_lba> option\n"
                      "to specify it manually, or perhaps try without "
                      "using -r and let the kernel deal with it\n";
                return(msg);
        }

        if (lp->d_magic != DISKMAGIC32 || lp->d_magic2 != DISKMAGIC32)
                return ("fixlabel: invalid magic");
        if (dkcksum32(lp) != 0)
                return ("fixlabel: invalid checksum");

        /*
         * What a mess.  For ages old backwards compatibility the disklabel
         * on-disk stores absolute offsets instead of slice-relative offsets.
         * So fix it up when reading, writing, or snooping.
         *
         * The in-core label is always slice-relative.
         */
        if (writeadj) {
                /*
                 * incore -> disk
                 */
                start = 0;
                offset = info.media_offset / info.media_blksize;
        } else {
                /*
                 * disk -> incore
                 */
                start = info.media_offset / info.media_blksize;
                offset = -info.media_offset / info.media_blksize;
        }
        if (pp->p_offset != start)
                return ("fixlabel: raw partition offset != slice offset");
        if (pp->p_size != info.media_blocks) {
                if (pp->p_size > info.media_blocks)
                        return ("fixlabel: raw partition size > slice size");
        }
        end = start + info.media_blocks;
        if (start > end)
                return ("fixlabel: slice wraps");
        if (lp->d_secpercyl <= 0)
                return ("fixlabel: d_secpercyl <= 0");
        pp -= RAW_PART;
        for (part = 0; part < lp->d_npartitions; part++, pp++) {
                if (pp->p_offset != 0 || pp->p_size != 0) {
                        if (pp->p_offset < start
                            || pp->p_offset + pp->p_size > end
                            || pp->p_offset + pp->p_size < pp->p_offset) {
                                /* XXX else silently discard junk. */
                                bzero(pp, sizeof *pp);
                        } else {
                                pp->p_offset += offset;
                        }
                }
        }
        lp->d_checksum = 0;
        lp->d_checksum = dkcksum32(lp);
        return (NULL);
}

void
usage(void)
{
#if NUMBOOT > 0
        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: disklabel32 [-r] disk",
                "\t\t(to read label)",
                "       disklabel32 -w [-r] [-n] disk type [packid]",
                "\t\t(to write label with existing boot program)",
                "       disklabel32 -e [-r] [-n] disk",
                "\t\t(to edit label)",
                "       disklabel32 -R [-r] [-n] disk protofile",
                "\t\t(to restore label with existing boot program)",
#if NUMBOOT > 1
                "       disklabel32 -B [-n] [-b boot1 -s boot2] disk [type]",
                "\t\t(to install boot program with existing label)",
                "       disklabel32 -w -B [-n] [-b boot1 -s boot2] disk type [packid]",
                "\t\t(to write label and boot program)",
                "       disklabel32 -R -B [-n] [-b boot1 -s boot2] disk protofile [type]",
                "\t\t(to restore label and boot program)",
#else
                "       disklabel32 -B [-n] [-b bootprog] disk [type]",
                "\t\t(to install boot program with existing on-disk label)",
                "       disklabel32 -w -B [-n] [-b bootprog] disk type [packid]",
                "\t\t(to write label and install boot program)",
                "       disklabel32 -R -B [-n] [-b bootprog] disk protofile [type]",
                "\t\t(to restore label and install boot program)",
#endif
                "       disklabel32 [-NW] disk",
                "\t\t(to write disable/enable label)");
#else
        fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
                "usage: disklabel32 [-r] disk", "(to read label)",
                "       disklabel32 -w [-r] [-n] disk type [packid]",
                "\t\t(to write label)",
                "       disklabel32 -e [-r] [-n] disk",
                "\t\t(to edit label)",
                "       disklabel32 -R [-r] [-n] disk protofile",
                "\t\t(to restore label)",
                "       disklabel32 [-NW] disk",
                "\t\t(to write disable/enable label)");
#endif
        fprintf(stderr, "%s\n%s\n",
                "       disklabel32 [-f slice_start_lba] [options]",
                "\t\t(to force using manual offset)");
        exit(1);
}