sbin/disklabel/disklabel.c

   1 /*
   2  * Copyright (c) 1987, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Symmetric Computer Systems.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  * @(#) Copyright (c) 1987, 1993 The Regents of the University of California.  All rights reserved.
  37  * @(#)disklabel.c      1.2 (Symmetric) 11/28/85
  38  * @(#)disklabel.c      8.2 (Berkeley) 1/7/94
  39  * $FreeBSD: src/sbin/disklabel/disklabel.c,v 1.28.2.15 2003/01/24 16:18:16 des Exp $
  40  * $DragonFly: src/sbin/disklabel/disklabel.c,v 1.28 2008/08/21 21:22:36 thomas Exp $
  41  */
  42
  43 #include <sys/param.h>
  44 #include <sys/file.h>
  45 #include <sys/stat.h>
  46 #include <sys/wait.h>
  47 #define DKTYPENAMES
  48 #include <sys/disklabel32.h>
  49 #include <sys/disklabel64.h>
  50 #include <sys/diskslice.h>
  51 #include <sys/diskmbr.h>
  52 #include <sys/dtype.h>
  53 #include <sys/sysctl.h>
  54 #include <disktab.h>
  55 #include <fstab.h>
  56
  57 #include <vfs/ufs/dinode.h>
  58 #include <vfs/ufs/fs.h>
  59
  60 #include <unistd.h>
  61 #include <string.h>
  62 #include <stdio.h>
  63 #include <stdlib.h>
  64 #include <signal.h>
  65 #include <stdarg.h>
  66 #include <ctype.h>
  67 #include <err.h>
  68 #include <errno.h>
  69 #include <disktab.h>
  70 #include "pathnames.h"
  71
  72 /*
  73  * Disklabel: read and write disklabels.
  74  * The label is usually placed on one of the first sectors of the disk.
  75  * Many machines also place a bootstrap in the same area,
  76  * in which case the label is embedded in the bootstrap.
  77  * The bootstrap source must leave space at the proper offset
  78  * for the label on such machines.
  79  */
  80
  81 #ifndef BBSIZE
  82 #define BBSIZE  8192                    /* size of boot area, with label */
  83 #endif
  84
  85 /* FIX!  These are too low, but are traditional */
  86 #define DEFAULT_NEWFS_BLOCK  8192U
  87 #define DEFAULT_NEWFS_FRAG   1024U
  88 #define DEFAULT_NEWFS_CPG    16U
  89
  90 #define BIG_NEWFS_BLOCK  16384U
  91 #define BIG_NEWFS_FRAG   2048U
  92 #define BIG_NEWFS_CPG    64U
  93
  94 #define NUMBOOT 2
  95
  96 void    makelabel(const char *, const char *, struct disklabel32 *);
  97 int     writelabel(int, const char *, struct disklabel32 *);
  98 void    l_perror(const char *);
  99 struct disklabel32 *readlabel(int);
 100 struct disklabel32 *makebootarea(char *, struct disklabel32 *, int);
 101 void    display(FILE *, const struct disklabel32 *);
 102 int     edit(struct disklabel32 *, int);
 103 int     editit(void);
 104 char    *skip(char *);
 105 char    *word(char *);
 106 int     getasciilabel(FILE *, struct disklabel32 *);
 107 int     getasciipartspec(char *, struct disklabel32 *, int, int);
 108 int     checklabel(struct disklabel32 *);
 109 void    setbootflag(struct disklabel32 *);
 110 void    Warning(const char *, ...) __printflike(1, 2);
 111 void    usage(void);
 112 int     checkoldboot(int, const char *);
 113 const char *fixlabel(int, struct disklabel32 *, int);
 114 struct disklabel32 *getvirginlabel(void);
 115 struct disklabel32 *getdisklabelfromdisktab(const char *name);
 116
 117 #define DEFEDITOR       _PATH_VI
 118 #define streq(a,b)      (strcmp(a,b) == 0)
 119
 120 char    *dkname;
 121 char    *specname;
 122 char    tmpfil[] = PATH_TMPFILE;
 123
 124 char    namebuf[BBSIZE];
 125 struct  disklabel32 lab;
 126 char    bootarea[BBSIZE];
 127
 128 #define MAX_PART ('z')
 129 #define MAX_NUM_PARTS (1 + MAX_PART - 'a')
 130 char    part_size_type[MAX_NUM_PARTS];
 131 char    part_offset_type[MAX_NUM_PARTS];
 132 int     part_set[MAX_NUM_PARTS];
 133
 134 #if NUMBOOT > 0
 135 int     installboot;    /* non-zero if we should install a boot program */
 136 char    *bootbuf;       /* pointer to buffer with remainder of boot prog */
 137 int     bootsize;       /* size of remaining boot program */
 138 char    *xxboot;        /* primary boot */
 139 char    *bootxx;        /* secondary boot */
 140 char    boot0[MAXPATHLEN];
 141 char    boot1[MAXPATHLEN];
 142 #endif
 143
 144 enum    {
 145         UNSPEC, EDIT, NOWRITE, READ, RESTORE, WRITE, WRITEABLE, WRITEBOOT
 146 } op = UNSPEC;
 147
 148 int     rflag;
 149 int     disable_write;   /* set to disable writing to disk label */
 150 int     forceflag;
 151 u_int32_t slice_start_lba;
 152
 153 #ifdef DEBUG
 154 int     debug;
 155 #define OPTIONS "BNRWb:def:nrs:w"
 156 #else
 157 #define OPTIONS "BNRWb:ef:nrs:w"
 158 #endif
 159
 160 int
 161 main(int argc, char *argv[])
 162 {
 163         struct disklabel32 *lp;
 164         FILE *t;
 165         int ch, f = 0, flag, error = 0;
 166         char *name = 0;
 167
 168         while ((ch = getopt(argc, argv, OPTIONS)) != -1)
 169                 switch (ch) {
 170 #if NUMBOOT > 0
 171                         case 'B':
 172                                 ++installboot;
 173                                 break;
 174                         case 'b':
 175                                 xxboot = optarg;
 176                                 break;
 177
 178                         case 'f':
 179                                 forceflag = 1;
 180                                 slice_start_lba = strtoul(optarg, NULL, 0);
 181                                 break;
 182 #if NUMBOOT > 1
 183                         case 's':
 184                                 bootxx = optarg;
 185                                 break;
 186 #endif
 187 #endif
 188                         case 'N':
 189                                 if (op != UNSPEC)
 190                                         usage();
 191                                 op = NOWRITE;
 192                                 break;
 193                         case 'n':
 194                                 disable_write = 1;
 195                                 break;
 196                         case 'R':
 197                                 if (op != UNSPEC)
 198                                         usage();
 199                                 op = RESTORE;
 200                                 break;
 201                         case 'W':
 202                                 if (op != UNSPEC)
 203                                         usage();
 204                                 op = WRITEABLE;
 205                                 break;
 206                         case 'e':
 207                                 if (op != UNSPEC)
 208                                         usage();
 209                                 op = EDIT;
 210                                 break;
 211                         case 'r':
 212                                 ++rflag;
 213                                 break;
 214                         case 'w':
 215                                 if (op != UNSPEC)
 216                                         usage();
 217                                 op = WRITE;
 218                                 break;
 219 #ifdef DEBUG
 220                         case 'd':
 221                                 debug++;
 222                                 break;
 223 #endif
 224                         case '?':
 225                         default:
 226                                 usage();
 227                 }
 228         argc -= optind;
 229         argv += optind;
 230 #if NUMBOOT > 0
 231         if (installboot) {
 232                 rflag++;
 233                 if (op == UNSPEC)
 234                         op = WRITEBOOT;
 235         } else {
 236                 if (op == UNSPEC)
 237                         op = READ;
 238                 xxboot = bootxx = 0;
 239         }
 240 #else
 241         if (op == UNSPEC)
 242                 op = READ;
 243 #endif
 244         if (argc < 1)
 245                 usage();
 246
 247         dkname = getdevpath(argv[0], 0);
 248         specname = dkname;
 249         f = open(specname, op == READ ? O_RDONLY : O_RDWR);
 250         if (f < 0)
 251                 err(4, "%s", specname);
 252
 253         switch(op) {
 254
 255         case UNSPEC:
 256                 break;
 257
 258         case EDIT:
 259                 if (argc != 1)
 260                         usage();
 261                 lp = readlabel(f);
 262                 error = edit(lp, f);
 263                 break;
 264
 265         case NOWRITE:
 266                 flag = 0;
 267                 if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0)
 268                         err(4, "ioctl DIOCWLABEL");
 269                 break;
 270
 271         case READ:
 272                 if (argc != 1)
 273                         usage();
 274                 lp = readlabel(f);
 275                 display(stdout, lp);
 276                 error = checklabel(lp);
 277                 if (checkoldboot(f, NULL))
 278                         warnx("Warning, old bootblocks detected, install new bootblocks & reinstall the disklabel");
 279                 break;
 280
 281         case RESTORE:
 282 #if NUMBOOT > 0
 283                 if (installboot && argc == 3) {
 284                         makelabel(argv[2], 0, &lab);
 285                         argc--;
 286
 287                         /*
 288                          * We only called makelabel() for its side effect
 289                          * of setting the bootstrap file names.  Discard
 290                          * all changes to `lab' so that all values in the
 291                          * final label come from the ASCII label.
 292                          */
 293                         bzero((char *)&lab, sizeof(lab));
 294                 }
 295 #endif
 296                 if (argc != 2)
 297                         usage();
 298                 if (!(t = fopen(argv[1], "r")))
 299                         err(4, "%s", argv[1]);
 300                 if (!getasciilabel(t, &lab))
 301                         exit(1);
 302                 lp = makebootarea(bootarea, &lab, f);
 303                 *lp = lab;
 304                 error = writelabel(f, bootarea, lp);
 305                 break;
 306
 307         case WRITE:
 308                 if (argc == 3) {
 309                         name = argv[2];
 310                         argc--;
 311                 }
 312                 if (argc != 2)
 313                         usage();
 314                 makelabel(argv[1], name, &lab);
 315                 lp = makebootarea(bootarea, &lab, f);
 316                 *lp = lab;
 317                 if (checklabel(lp) == 0)
 318                         error = writelabel(f, bootarea, lp);
 319                 break;
 320
 321         case WRITEABLE:
 322                 flag = 1;
 323                 if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0)
 324                         err(4, "ioctl DIOCWLABEL");
 325                 break;
 326
 327 #if NUMBOOT > 0
 328         case WRITEBOOT:
 329         {
 330                 struct disklabel32 tlab;
 331
 332                 lp = readlabel(f);
 333                 tlab = *lp;
 334                 if (argc == 2)
 335                         makelabel(argv[1], 0, &lab);
 336                 lp = makebootarea(bootarea, &lab, f);
 337                 *lp = tlab;
 338                 if (checklabel(lp) == 0)
 339                         error = writelabel(f, bootarea, lp);
 340                 break;
 341         }
 342 #endif
 343         }
 344         exit(error);
 345 }
 346
 347 /*
 348  * Construct a prototype disklabel from /etc/disktab.  As a side
 349  * effect, set the names of the primary and secondary boot files
 350  * if specified.
 351  */
 352 void
 353 makelabel(const char *type, const char *name, struct disklabel32 *lp)
 354 {
 355         struct disklabel32 *dp;
 356
 357         if (strcmp(type, "auto") == 0)
 358                 dp = getvirginlabel();
 359         else
 360                 dp = getdisklabelfromdisktab(type);
 361         if (dp == NULL)
 362                 errx(1, "%s: unknown disk type", type);
 363         *lp = *dp;
 364
 365         /*
 366          * NOTE: boot control files may no longer be specified in disktab.
 367          */
 368         if (name)
 369                 strncpy(lp->d_packname, name, sizeof(lp->d_packname));
 370 }
 371
 372 int
 373 writelabel(int f, const char *boot, struct disklabel32 *lp)
 374 {
 375         const char *msg;
 376         int flag;
 377         int r;
 378
 379         if (disable_write) {
 380                 Warning("write to disk label suppressed - label was as follows:");
 381                 display(stdout, lp);
 382                 return (0);
 383         } else {
 384                 /* make sure we are not overwriting our boot code */
 385                 if (checkoldboot(f, boot))
 386                         errx(4, "Will not overwrite old bootblocks w/ label, install new boot blocks first!");
 387                 setbootflag(lp);
 388                 lp->d_magic = DISKMAGIC32;
 389                 lp->d_magic2 = DISKMAGIC32;
 390                 lp->d_checksum = 0;
 391                 lp->d_checksum = dkcksum32(lp);
 392                 if (rflag) {
 393                         /*
 394                          * First set the kernel disk label,
 395                          * then write a label to the raw disk.
 396                          * If the SDINFO ioctl fails because it is unimplemented,
 397                          * keep going; otherwise, the kernel consistency checks
 398                          * may prevent us from changing the current (in-core)
 399                          * label.
 400                          */
 401                         if (ioctl(f, DIOCSDINFO32, lp) < 0 &&
 402                                 errno != ENODEV && errno != ENOTTY) {
 403                                 l_perror("ioctl DIOCSDINFO32");
 404                                 return (1);
 405                         }
 406                         lseek(f, (off_t)0, SEEK_SET);
 407
 408                         /*
 409                          * write enable label sector before write
 410                          * (if necessary), disable after writing.
 411                          */
 412                         flag = 1;
 413                         if (ioctl(f, DIOCWLABEL, &flag) < 0)
 414                                 warn("ioctl DIOCWLABEL");
 415                         msg = fixlabel(f, lp, 1);
 416                         if (msg) {
 417                                 warn(msg);
 418                                 return (1);
 419                         }
 420                         r = write(f, boot, lp->d_bbsize);
 421                         fixlabel(f, lp, 0);
 422                         if (r != ((ssize_t)lp->d_bbsize)) {
 423                                 warn("write");
 424                                 return (1);
 425                         }
 426 #if NUMBOOT > 0
 427                         /*
 428                          * Output the remainder of the disklabel
 429                          */
 430                         if (bootbuf) {
 431                                 fixlabel(f, lp, 1);
 432                                 r = write(f, bootbuf, bootsize);
 433                                 fixlabel(f, lp, 0);
 434                                 if (r != bootsize) {
 435                                         warn("write");
 436                                         return(1);
 437                                 }
 438                         }
 439 #endif
 440                         flag = 0;
 441                         ioctl(f, DIOCWLABEL, &flag);
 442                 } else if (ioctl(f, DIOCWDINFO32, lp) < 0) {
 443                         l_perror("ioctl DIOCWDINFO32");
 444                         return (1);
 445                 }
 446         }
 447         return (0);
 448 }
 449
 450 void
 451 l_perror(const char *s)
 452 {
 453         switch (errno) {
 454
 455         case ESRCH:
 456                 warnx("%s: no disk label on disk;", s);
 457                 fprintf(stderr, "add \"-r\" to install initial label\n");
 458                 break;
 459
 460         case EINVAL:
 461                 warnx("%s: label magic number or checksum is wrong!", s);
 462                 fprintf(stderr, "(disklabel or kernel is out of date?)\n");
 463                 break;
 464
 465         case EBUSY:
 466                 warnx("%s: open partition would move or shrink", s);
 467                 break;
 468
 469         case EXDEV:
 470                 warnx("%s: '%c' partition must start at beginning of disk",
 471                     s, 'a' + RAW_PART);
 472                 break;
 473
 474         case ENOATTR:
 475                 warnx("%s: the disk already has a label of a different type,\n"
 476                       "probably a 64 bit disklabel.  It must be cleaned out "
 477                       "first.\n", s);
 478                 break;
 479
 480         default:
 481                 warn(NULL);
 482                 break;
 483         }
 484 }
 485
 486 /*
 487  * Fetch disklabel for disk.
 488  * Use ioctl to get label unless -r flag is given.
 489  */
 490 struct disklabel32 *
 491 readlabel(int f)
 492 {
 493         const char *msg;
 494         struct disklabel32 *lp;
 495         int r;
 496
 497         if (rflag) {
 498                 r = read(f, bootarea, BBSIZE);
 499                 if (r < BBSIZE)
 500                         err(4, "%s", specname);
 501                 for (lp = (struct disklabel32 *)bootarea;
 502                     lp <= (struct disklabel32 *)(bootarea + BBSIZE - sizeof(*lp));
 503                     lp = (struct disklabel32 *)((char *)lp + 16)) {
 504                         if (lp->d_magic == DISKMAGIC32 &&
 505                             lp->d_magic2 == DISKMAGIC32)
 506                                 break;
 507                 }
 508                 if (lp > (struct disklabel32 *)(bootarea+BBSIZE-sizeof(*lp)) ||
 509                     lp->d_magic != DISKMAGIC32 || lp->d_magic2 != DISKMAGIC32 ||
 510                     dkcksum32(lp) != 0) {
 511                         errx(1, "bad pack magic number (label is damaged, "
 512                                 "or pack is unlabeled)");
 513                 }
 514                 if ((msg = fixlabel(f, lp, 0)) != NULL)
 515                         errx(1, msg);
 516         } else {
 517                 lp = &lab;
 518                 if (ioctl(f, DIOCGDINFO32, lp) < 0) {
 519                         l_perror("ioctl DIOCGDINFO32");
 520                         exit(4);
 521                 }
 522         }
 523         return (lp);
 524 }
 525
 526 /*
 527  * Construct a bootarea (d_bbsize bytes) in the specified buffer ``boot''
 528  * Returns a pointer to the disklabel portion of the bootarea.
 529  */
 530 struct disklabel32 *
 531 makebootarea(char *boot, struct disklabel32 *dp, int f)
 532 {
 533         struct disklabel32 *lp;
 534         char *p;
 535         int b;
 536 #if NUMBOOT > 0
 537         struct stat sb;
 538 #endif
 539 #ifdef __i386__
 540         char *tmpbuf;
 541         unsigned int i, found;
 542 #endif
 543
 544         /* XXX */
 545         if (dp->d_secsize == 0) {
 546                 dp->d_secsize = DEV_BSIZE;
 547                 dp->d_bbsize = BBSIZE;
 548         }
 549         lp = (struct disklabel32 *)
 550                 (boot + (LABELSECTOR32 * dp->d_secsize) + LABELOFFSET32);
 551         bzero((char *)lp, sizeof *lp);
 552 #if NUMBOOT > 0
 553         /*
 554          * If we are not installing a boot program but we are installing a
 555          * label on disk then we must read the current bootarea so we don't
 556          * clobber the existing boot.
 557          */
 558         if (!installboot) {
 559                 if (rflag) {
 560                         if (read(f, boot, BBSIZE) < BBSIZE)
 561                                 err(4, "%s", specname);
 562                         bzero((char *)lp, sizeof *lp);
 563                 }
 564                 return (lp);
 565         }
 566         /*
 567          * We are installing a boot program.  Determine the name(s) and
 568          * read them into the appropriate places in the boot area.
 569          */
 570         if (!xxboot || !bootxx) {
 571                 if (!xxboot) {
 572                         sprintf(boot0, "%s/boot1", _PATH_BOOTDIR);
 573                         xxboot = boot0;
 574                 }
 575 #if NUMBOOT > 1
 576                 if (!bootxx) {
 577                         sprintf(boot1, "%s/boot2", _PATH_BOOTDIR);
 578                         bootxx = boot1;
 579                 }
 580 #endif
 581         }
 582 #ifdef DEBUG
 583         if (debug)
 584                 fprintf(stderr, "bootstraps: xxboot = %s, bootxx = %s\n",
 585                         xxboot, bootxx ? bootxx : "NONE");
 586 #endif
 587
 588         /*
 589          * Strange rules:
 590          * 1. One-piece bootstrap (hp300/hp800)
 591          *      up to d_bbsize bytes of ``xxboot'' go in bootarea, the rest
 592          *      is remembered and written later following the bootarea.
 593          * 2. Two-piece bootstraps (vax/i386?/mips?)
 594          *      up to d_secsize bytes of ``xxboot'' go in first d_secsize
 595          *      bytes of bootarea, remaining d_bbsize-d_secsize filled
 596          *      from ``bootxx''.
 597          */
 598         b = open(xxboot, O_RDONLY);
 599         if (b < 0)
 600                 err(4, "%s", xxboot);
 601 #if NUMBOOT > 1
 602 #ifdef __i386__
 603         /*
 604          * XXX Botch alert.
 605          * The i386 has the so-called fdisk table embedded into the
 606          * primary bootstrap.  We take care to not clobber it, but
 607          * only if it does already contain some data.  (Otherwise,
 608          * the xxboot provides a template.)
 609          */
 610         if ((tmpbuf = (char *)malloc((int)dp->d_secsize)) == 0)
 611                 err(4, "%s", xxboot);
 612         memcpy((void *)tmpbuf, (void *)boot, (int)dp->d_secsize);
 613 #endif /* i386 */
 614         if (read(b, boot, (int)dp->d_secsize) < 0)
 615                 err(4, "%s", xxboot);
 616         close(b);
 617 #ifdef __i386__
 618         for (i = DOSPARTOFF, found = 0;
 619              !found && i < DOSPARTOFF + NDOSPART*sizeof(struct dos_partition);
 620              i++)
 621                 found = tmpbuf[i] != 0;
 622         if (found)
 623                 memcpy((void *)&boot[DOSPARTOFF],
 624                        (void *)&tmpbuf[DOSPARTOFF],
 625                        NDOSPART * sizeof(struct dos_partition));
 626         free(tmpbuf);
 627 #endif /* i386 */
 628         b = open(bootxx, O_RDONLY);
 629         if (b < 0)
 630                 err(4, "%s", bootxx);
 631         if (fstat(b, &sb) != 0)
 632                 err(4, "%s", bootxx);
 633         if (dp->d_secsize + sb.st_size > dp->d_bbsize)
 634                 errx(4, "%s too large", bootxx);
 635         if (read(b, &boot[dp->d_secsize],
 636                  (int)(dp->d_bbsize-dp->d_secsize)) < 0)
 637                 err(4, "%s", bootxx);
 638 #else /* !(NUMBOOT > 1) */
 639         if (read(b, boot, (int)dp->d_bbsize) < 0)
 640                 err(4, "%s", xxboot);
 641         if (fstat(b, &sb) != 0)
 642                 err(4, "%s", xxboot);
 643         bootsize = (int)sb.st_size - dp->d_bbsize;
 644         if (bootsize > 0) {
 645                 /* XXX assume d_secsize is a power of two */
 646                 bootsize = (bootsize + dp->d_secsize-1) & ~(dp->d_secsize-1);
 647                 bootbuf = (char *)malloc((size_t)bootsize);
 648                 if (bootbuf == 0)
 649                         err(4, "%s", xxboot);
 650                 if (read(b, bootbuf, bootsize) < 0) {
 651                         free(bootbuf);
 652                         err(4, "%s", xxboot);
 653                 }
 654         }
 655 #endif /* NUMBOOT > 1 */
 656         close(b);
 657 #endif /* NUMBOOT > 0 */
 658         /*
 659          * Make sure no part of the bootstrap is written in the area
 660          * reserved for the label.
 661          */
 662         for (p = (char *)lp; p < (char *)lp + sizeof(struct disklabel32); p++)
 663                 if (*p)
 664                         errx(2, "bootstrap doesn't leave room for disk label");
 665         return (lp);
 666 }
 667
 668 void
 669 display(FILE *f, const struct disklabel32 *lp)
 670 {
 671         int i, j;
 672         const struct partition32 *pp;
 673
 674         fprintf(f, "# %s:\n", specname);
 675         if (lp->d_type < DKMAXTYPES)
 676                 fprintf(f, "type: %s\n", dktypenames[lp->d_type]);
 677         else
 678                 fprintf(f, "type: %u\n", lp->d_type);
 679         fprintf(f, "disk: %.*s\n", (int)sizeof(lp->d_typename),
 680                 lp->d_typename);
 681         fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname),
 682                 lp->d_packname);
 683         fprintf(f, "flags:");
 684         fprintf(f, "\n");
 685         fprintf(f, "bytes/sector: %lu\n", (u_long)lp->d_secsize);
 686         fprintf(f, "sectors/track: %lu\n", (u_long)lp->d_nsectors);
 687         fprintf(f, "tracks/cylinder: %lu\n", (u_long)lp->d_ntracks);
 688         fprintf(f, "sectors/cylinder: %lu\n", (u_long)lp->d_secpercyl);
 689         fprintf(f, "cylinders: %lu\n", (u_long)lp->d_ncylinders);
 690         fprintf(f, "sectors/unit: %lu\n", (u_long)lp->d_secperunit);
 691         fprintf(f, "rpm: %u\n", lp->d_rpm);
 692         fprintf(f, "interleave: %u\n", lp->d_interleave);
 693         fprintf(f, "trackskew: %u\n", lp->d_trackskew);
 694         fprintf(f, "cylinderskew: %u\n", lp->d_cylskew);
 695         fprintf(f, "headswitch: %lu\t\t# milliseconds\n",
 696             (u_long)lp->d_headswitch);
 697         fprintf(f, "track-to-track seek: %ld\t# milliseconds\n",
 698             (u_long)lp->d_trkseek);
 699         fprintf(f, "drivedata: ");
 700         for (i = NDDATA32 - 1; i >= 0; i--) {
 701                 if (lp->d_drivedata[i])
 702                         break;
 703         }
 704         if (i < 0)
 705                 i = 0;
 706         for (j = 0; j <= i; j++)
 707                 fprintf(f, "%lu ", (u_long)lp->d_drivedata[j]);
 708         fprintf(f, "\n\n%u partitions:\n", lp->d_npartitions);
 709         fprintf(f,
 710             "#          size     offset    fstype\n");
 711         pp = lp->d_partitions;
 712         for (i = 0; i < lp->d_npartitions; i++, pp++) {
 713                 if (pp->p_size) {
 714                         u_long onemeg = 1024 * 1024 / lp->d_secsize;
 715                         fprintf(f, "  %c: ", 'a' + i);
 716
 717                         fprintf(f, "%10lu ", (u_long)pp->p_size);
 718                         fprintf(f, "%10lu  ", (u_long)pp->p_offset);
 719                         if (pp->p_fstype < FSMAXTYPES)
 720                                 fprintf(f, "%8.8s", fstypenames[pp->p_fstype]);
 721                         else
 722                                 fprintf(f, "%8d", pp->p_fstype);
 723
 724                         fprintf(f, "\t# %11.3fMB", (double)pp->p_size / onemeg);
 725                         fprintf(f, "\n");
 726                 }
 727         }
 728         fflush(f);
 729 }
 730
 731 int
 732 edit(struct disklabel32 *lp, int f)
 733 {
 734         int c, fd;
 735         struct disklabel32 label;
 736         FILE *fp;
 737
 738         if ((fd = mkstemp(tmpfil)) == -1 ||
 739             (fp = fdopen(fd, "w")) == NULL) {
 740                 warnx("can't create %s", tmpfil);
 741                 return (1);
 742         }
 743         display(fp, lp);
 744         fclose(fp);
 745         for (;;) {
 746                 if (!editit())
 747                         break;
 748                 fp = fopen(tmpfil, "r");
 749                 if (fp == NULL) {
 750                         warnx("can't reopen %s for reading", tmpfil);
 751                         break;
 752                 }
 753                 bzero((char *)&label, sizeof(label));
 754                 if (getasciilabel(fp, &label)) {
 755                         *lp = label;
 756                         if (writelabel(f, bootarea, lp) == 0) {
 757                                 fclose(fp);
 758                                 unlink(tmpfil);
 759                                 return (0);
 760                         }
 761                 }
 762                 fclose(fp);
 763                 printf("re-edit the label? [y]: "); fflush(stdout);
 764                 c = getchar();
 765                 if (c != EOF && c != (int)'\n')
 766                         while (getchar() != (int)'\n')
 767                                 ;
 768                 if  (c == (int)'n')
 769                         break;
 770         }
 771         unlink(tmpfil);
 772         return (1);
 773 }
 774
 775 int
 776 editit(void)
 777 {
 778         int pid, xpid;
 779         int status, omask;
 780         const char *ed;
 781
 782         omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP));
 783         while ((pid = fork()) < 0) {
 784                 if (errno == EPROCLIM) {
 785                         warnx("you have too many processes");
 786                         return(0);
 787                 }
 788                 if (errno != EAGAIN) {
 789                         warn("fork");
 790                         return(0);
 791                 }
 792                 sleep(1);
 793         }
 794         if (pid == 0) {
 795                 sigsetmask(omask);
 796                 setgid(getgid());
 797                 setuid(getuid());
 798                 if ((ed = getenv("EDITOR")) == NULL)
 799                         ed = DEFEDITOR;
 800                 execlp(ed, ed, tmpfil, NULL);
 801                 err(1, "%s", ed);
 802         }
 803         while ((xpid = wait(&status)) >= 0)
 804                 if (xpid == pid)
 805                         break;
 806         sigsetmask(omask);
 807         return(!status);
 808 }
 809
 810 char *
 811 skip(char *cp)
 812 {
 813
 814         while (*cp != '\0' && isspace(*cp))
 815                 cp++;
 816         if (*cp == '\0' || *cp == '#')
 817                 return (NULL);
 818         return (cp);
 819 }
 820
 821 char *
 822 word(char *cp)
 823 {
 824         char c;
 825
 826         while (*cp != '\0' && !isspace(*cp) && *cp != '#')
 827                 cp++;
 828         if ((c = *cp) != '\0') {
 829                 *cp++ = '\0';
 830                 if (c != '#')
 831                         return (skip(cp));
 832         }
 833         return (NULL);
 834 }
 835
 836 /*
 837  * Read an ascii label in from fd f,
 838  * in the same format as that put out by display(),
 839  * and fill in lp.
 840  */
 841 int
 842 getasciilabel(FILE *f, struct disklabel32 *lp)
 843 {
 844         char *cp;
 845         const char **cpp;
 846         u_int part;
 847         char *tp, line[BUFSIZ];
 848         u_long v;
 849         int lineno = 0, errors = 0;
 850         int i;
 851         char empty[] = "";
 852         char unknown[] = "unknown";
 853
 854         bzero(&part_set, sizeof(part_set));
 855         bzero(&part_size_type, sizeof(part_size_type));
 856         bzero(&part_offset_type, sizeof(part_offset_type));
 857         lp->d_bbsize = BBSIZE;                          /* XXX */
 858         lp->d_sbsize = SBSIZE;                          /* XXX */
 859         while (fgets(line, sizeof(line) - 1, f)) {
 860                 lineno++;
 861                 if ((cp = strchr(line,'\n')) != 0)
 862                         *cp = '\0';
 863                 cp = skip(line);
 864                 if (cp == NULL)
 865                         continue;
 866                 tp = strchr(cp, ':');
 867                 if (tp == NULL) {
 868                         fprintf(stderr, "line %d: syntax error\n", lineno);
 869                         errors++;
 870                         continue;
 871                 }
 872                 *tp++ = '\0', tp = skip(tp);
 873                 if (streq(cp, "type")) {
 874                         if (tp == NULL)
 875                                 tp = unknown;
 876                         cpp = dktypenames;
 877                         for (; cpp < &dktypenames[DKMAXTYPES]; cpp++) {
 878                                 if (*cpp && strcasecmp(*cpp, tp) == 0) {
 879                                         lp->d_type = cpp - dktypenames;
 880                                         break;
 881                                 }
 882                         }
 883                         if (cpp < &dktypenames[DKMAXTYPES])
 884                                 continue;
 885                         v = strtoul(tp, NULL, 10);
 886                         if (v >= DKMAXTYPES) {
 887                                 fprintf(stderr, "line %d:%s %lu\n", lineno,
 888                                     "Warning, unknown disk type", v);
 889                         }
 890                         lp->d_type = v;
 891                         continue;
 892                 }
 893                 if (streq(cp, "flags")) {
 894                         for (v = 0; (cp = tp) && *cp != '\0';) {
 895                                 tp = word(cp);
 896                                 if (streq(cp, "removeable"))
 897                                         v |= 0; /* obsolete */
 898                                 else if (streq(cp, "ecc"))
 899                                         v |= 0; /* obsolete */
 900                                 else if (streq(cp, "badsect"))
 901                                         v |= 0; /* obsolete */
 902                                 else {
 903                                         fprintf(stderr,
 904                                             "line %d: %s: bad flag\n",
 905                                             lineno, cp);
 906                                         errors++;
 907                                 }
 908                         }
 909                         lp->d_flags = v;
 910                         continue;
 911                 }
 912                 if (streq(cp, "drivedata")) {
 913                         for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA32;) {
 914                                 lp->d_drivedata[i++] = strtoul(cp, NULL, 10);
 915                                 tp = word(cp);
 916                         }
 917                         continue;
 918                 }
 919                 if (sscanf(cp, "%lu partitions", &v) == 1) {
 920                         if (v == 0 || v > MAXPARTITIONS32) {
 921                                 fprintf(stderr,
 922                                     "line %d: bad # of partitions\n", lineno);
 923                                 lp->d_npartitions = MAXPARTITIONS32;
 924                                 errors++;
 925                         } else
 926                                 lp->d_npartitions = v;
 927                         continue;
 928                 }
 929                 if (tp == NULL)
 930                         tp = empty;
 931                 if (streq(cp, "disk")) {
 932                         strncpy(lp->d_typename, tp, sizeof (lp->d_typename));
 933                         continue;
 934                 }
 935                 if (streq(cp, "label")) {
 936                         strncpy(lp->d_packname, tp, sizeof (lp->d_packname));
 937                         continue;
 938                 }
 939                 if (streq(cp, "bytes/sector")) {
 940                         v = strtoul(tp, NULL, 10);
 941                         if (v == 0 || (v % DEV_BSIZE) != 0) {
 942                                 fprintf(stderr,
 943                                     "line %d: %s: bad sector size\n",
 944                                     lineno, tp);
 945                                 errors++;
 946                         } else
 947                                 lp->d_secsize = v;
 948                         continue;
 949                 }
 950                 if (streq(cp, "sectors/track")) {
 951                         v = strtoul(tp, NULL, 10);
 952 #if (ULONG_MAX != 0xffffffffUL)
 953                         if (v == 0 || v > 0xffffffff) {
 954 #else
 955                         if (v == 0) {
 956 #endif
 957                                 fprintf(stderr, "line %d: %s: bad %s\n",
 958                                     lineno, tp, cp);
 959                                 errors++;
 960                         } else
 961                                 lp->d_nsectors = v;
 962                         continue;
 963                 }
 964                 if (streq(cp, "sectors/cylinder")) {
 965                         v = strtoul(tp, NULL, 10);
 966                         if (v == 0) {
 967                                 fprintf(stderr, "line %d: %s: bad %s\n",
 968                                     lineno, tp, cp);
 969                                 errors++;
 970                         } else
 971                                 lp->d_secpercyl = v;
 972                         continue;
 973                 }
 974                 if (streq(cp, "tracks/cylinder")) {
 975                         v = strtoul(tp, NULL, 10);
 976                         if (v == 0) {
 977                                 fprintf(stderr, "line %d: %s: bad %s\n",
 978                                     lineno, tp, cp);
 979                                 errors++;
 980                         } else
 981                                 lp->d_ntracks = v;
 982                         continue;
 983                 }
 984                 if (streq(cp, "cylinders")) {
 985                         v = strtoul(tp, NULL, 10);
 986                         if (v == 0) {
 987                                 fprintf(stderr, "line %d: %s: bad %s\n",
 988                                     lineno, tp, cp);
 989                                 errors++;
 990                         } else
 991                                 lp->d_ncylinders = v;
 992                         continue;
 993                 }
 994                 if (streq(cp, "sectors/unit")) {
 995                         v = strtoul(tp, NULL, 10);
 996                         if (v == 0) {
 997                                 fprintf(stderr, "line %d: %s: bad %s\n",
 998                                     lineno, tp, cp);
 999                                 errors++;
1000                         } else
1001                                 lp->d_secperunit = v;
1002                         continue;
1003                 }
1004                 if (streq(cp, "rpm")) {
1005                         v = strtoul(tp, NULL, 10);
1006                         if (v == 0 || v > USHRT_MAX) {
1007                                 fprintf(stderr, "line %d: %s: bad %s\n",
1008                                     lineno, tp, cp);
1009                                 errors++;
1010                         } else
1011                                 lp->d_rpm = v;
1012                         continue;
1013                 }
1014                 if (streq(cp, "interleave")) {
1015                         v = strtoul(tp, NULL, 10);
1016                         if (v == 0 || v > USHRT_MAX) {
1017                                 fprintf(stderr, "line %d: %s: bad %s\n",
1018                                     lineno, tp, cp);
1019                                 errors++;
1020                         } else
1021                                 lp->d_interleave = v;
1022                         continue;
1023                 }
1024                 if (streq(cp, "trackskew")) {
1025                         v = strtoul(tp, NULL, 10);
1026                         if (v > USHRT_MAX) {
1027                                 fprintf(stderr, "line %d: %s: bad %s\n",
1028                                     lineno, tp, cp);
1029                                 errors++;
1030                         } else
1031                                 lp->d_trackskew = v;
1032                         continue;
1033                 }
1034                 if (streq(cp, "cylinderskew")) {
1035                         v = strtoul(tp, NULL, 10);
1036                         if (v > USHRT_MAX) {
1037                                 fprintf(stderr, "line %d: %s: bad %s\n",
1038                                     lineno, tp, cp);
1039                                 errors++;
1040                         } else
1041                                 lp->d_cylskew = v;
1042                         continue;
1043                 }
1044                 if (streq(cp, "headswitch")) {
1045                         v = strtoul(tp, NULL, 10);
1046                         lp->d_headswitch = v;
1047                         continue;
1048                 }
1049                 if (streq(cp, "track-to-track seek")) {
1050                         v = strtoul(tp, NULL, 10);
1051                         lp->d_trkseek = v;
1052                         continue;
1053                 }
1054                 /* the ':' was removed above */
1055                 if (*cp < 'a' || *cp > MAX_PART || cp[1] != '\0') {
1056                         fprintf(stderr,
1057                             "line %d: %s: Unknown disklabel field\n", lineno,
1058                             cp);
1059                         errors++;
1060                         continue;
1061                 }
1062
1063                 /* Process a partition specification line. */
1064                 part = *cp - 'a';
1065                 if (part >= lp->d_npartitions) {
1066                         fprintf(stderr,
1067                             "line %d: partition name out of range a-%c: %s\n",
1068                             lineno, 'a' + lp->d_npartitions - 1, cp);
1069                         errors++;
1070                         continue;
1071                 }
1072                 part_set[part] = 1;
1073
1074                 if (getasciipartspec(tp, lp, part, lineno) != 0) {
1075                         errors++;
1076                         break;
1077                 }
1078         }
1079         errors += checklabel(lp);
1080         return (errors == 0);
1081 }
1082
1083 #define NXTNUM(n) do { \
1084         if (tp == NULL) { \
1085                 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \
1086                 return (1); \
1087         } else { \
1088                 cp = tp, tp = word(cp); \
1089                 (n) = strtoul(cp, NULL, 10); \
1090         } \
1091 } while (0)
1092
1093 /* retain 1 character following number */
1094 #define NXTWORD(w,n) do { \
1095         if (tp == NULL) { \
1096                 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \
1097                 return (1); \
1098         } else { \
1099                 char *tmp; \
1100                 cp = tp, tp = word(cp); \
1101                 (n) = strtoul(cp, &tmp, 10); \
1102                 if (tmp) (w) = *tmp; \
1103         } \
1104 } while (0)
1105
1106 /*
1107  * Read a partition line into partition `part' in the specified disklabel.
1108  * Return 0 on success, 1 on failure.
1109  */
1110 int
1111 getasciipartspec(char *tp, struct disklabel32 *lp, int part, int lineno)
1112 {
1113         struct partition32 *pp;
1114         char *cp;
1115         const char **cpp;
1116         u_long v;
1117
1118         pp = &lp->d_partitions[part];
1119         cp = NULL;
1120
1121         /*
1122          * size
1123          */
1124         v = 0;
1125         NXTWORD(part_size_type[part],v);
1126         if (v == 0 && part_size_type[part] != '*') {
1127                 fprintf(stderr,
1128                     "line %d: %s: bad partition size\n", lineno, cp);
1129                 return (1);
1130         }
1131         pp->p_size = v;
1132
1133         /*
1134          * offset
1135          */
1136         v = 0;
1137         NXTWORD(part_offset_type[part],v);
1138         if (v == 0 && part_offset_type[part] != '*' &&
1139             part_offset_type[part] != '\0') {
1140                 fprintf(stderr,
1141                     "line %d: %s: bad partition offset\n", lineno, cp);
1142                 return (1);
1143         }
1144         pp->p_offset = v;
1145
1146         /*
1147          * fstype
1148          */
1149         if (tp == NULL) {
1150                 fprintf(stderr,
1151                     "line %d: no filesystem type was specified\n", lineno);
1152                return(1);
1153         }
1154         cp = tp;
1155         tp = word(cp);
1156         for (cpp = fstypenames; cpp < &fstypenames[FSMAXTYPES]; cpp++) {
1157                 if (*cpp && strcasecmp(*cpp, cp) == 0)
1158                         break;
1159         }
1160         if (*cpp != NULL) {
1161                 pp->p_fstype = cpp - fstypenames;
1162         } else {
1163                 if (isdigit(*cp))
1164                         v = strtoul(cp, NULL, 10);
1165                 else
1166                         v = FSMAXTYPES;
1167                 if (v >= FSMAXTYPES) {
1168                         fprintf(stderr,
1169                             "line %d: Warning, unknown filesystem type %s\n",
1170                             lineno, cp);
1171                         v = FS_UNUSED;
1172                 }
1173                 pp->p_fstype = v;
1174         }
1175
1176         pp->p_fsize = 0;
1177         pp->p_frag = 0;
1178         pp->p_cpg = 0;
1179
1180         cp = tp;
1181         if (tp) {
1182                 fprintf(stderr, "line %d: Warning, fragment, block, "
1183                                 "and bps/cpg fields are no\n"
1184                                 "longer supported and must be specified "
1185                                 "via newfs options instead.\n",
1186                         lineno);
1187         }
1188         return(0);
1189 }
1190
1191 /*
1192  * Check disklabel for errors and fill in
1193  * derived fields according to supplied values.
1194  */
1195 int
1196 checklabel(struct disklabel32 *lp)
1197 {
1198         struct partition32 *pp;
1199         int i, errors = 0;
1200         char part;
1201         u_long base_offset, needed, total_size, total_percent, current_offset;
1202         long free_space;
1203         int seen_default_offset;
1204         int hog_part;
1205         int j;
1206         struct partition32 *pp2;
1207
1208         if (lp->d_secsize == 0) {
1209                 fprintf(stderr, "sector size 0\n");
1210                 return (1);
1211         }
1212         if (lp->d_nsectors == 0) {
1213                 fprintf(stderr, "sectors/track 0\n");
1214                 return (1);
1215         }
1216         if (lp->d_ntracks == 0) {
1217                 fprintf(stderr, "tracks/cylinder 0\n");
1218                 return (1);
1219         }
1220         if  (lp->d_ncylinders == 0) {
1221                 fprintf(stderr, "cylinders/unit 0\n");
1222                 errors++;
1223         }
1224         if (lp->d_rpm == 0)
1225                 Warning("revolutions/minute 0");
1226         if (lp->d_secpercyl == 0)
1227                 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks;
1228         if (lp->d_secperunit == 0)
1229                 lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders;
1230         if (lp->d_bbsize == 0) {
1231                 fprintf(stderr, "boot block size 0\n");
1232                 errors++;
1233         } else if (lp->d_bbsize % lp->d_secsize)
1234                 Warning("boot block size %% sector-size != 0");
1235         if (lp->d_sbsize == 0) {
1236                 fprintf(stderr, "super block size 0\n");
1237                 errors++;
1238         } else if (lp->d_sbsize % lp->d_secsize)
1239                 Warning("super block size %% sector-size != 0");
1240         if (lp->d_npartitions > MAXPARTITIONS32)
1241                 Warning("number of partitions (%lu) > MAXPARTITIONS (%d)",
1242                     (u_long)lp->d_npartitions, MAXPARTITIONS32);
1243
1244         /* first allocate space to the partitions, then offsets */
1245         total_size = 0; /* in sectors */
1246         total_percent = 0; /* in percent */
1247         hog_part = -1;
1248         /* find all fixed partitions */
1249         for (i = 0; i < lp->d_npartitions; i++) {
1250                 pp = &lp->d_partitions[i];
1251                 if (part_set[i]) {
1252
1253                         if (part_size_type[i] == '*') {
1254                                 if (i == RAW_PART) {
1255                                         pp->p_size = lp->d_secperunit;
1256                                 } else {
1257                                         if (part_offset_type[i] != '*') {
1258                                                 if (total_size < pp->p_offset)
1259                                                         total_size = pp->p_offset;
1260                                         }
1261                                         if (hog_part != -1)
1262                                                 Warning("Too many '*' partitions (%c and %c)",
1263                                                     hog_part + 'a',i + 'a');
1264                                         else
1265                                                 hog_part = i;
1266                                 }
1267                         } else {
1268                                 off_t size;
1269
1270                                 size = pp->p_size;
1271                                 switch (part_size_type[i]) {
1272                                 case '%':
1273                                         total_percent += size;
1274                                         break;
1275                                 case 'k':
1276                                 case 'K':
1277                                         size *= 1024ULL;
1278                                         break;
1279                                 case 'm':
1280                                 case 'M':
1281                                         size *= 1024ULL * 1024ULL;
1282                                         break;
1283                                 case 'g':
1284                                 case 'G':
1285                                         size *= 1024ULL * 1024ULL * 1024ULL;
1286                                         break;
1287                                 case '\0':
1288                                         break;
1289                                 default:
1290                                         Warning("unknown size specifier '%c' (K/M/G are valid)",part_size_type[i]);
1291                                         break;
1292                                 }
1293                                 /* don't count %'s yet */
1294                                 if (part_size_type[i] != '%') {
1295                                         /*
1296                                          * for all not in sectors, convert to
1297                                          * sectors
1298                                          */
1299                                         if (part_size_type[i] != '\0') {
1300                                                 if (size % lp->d_secsize != 0)
1301                                                         Warning("partition %c not an integer number of sectors",
1302                                                             i + 'a');
1303                                                 size /= lp->d_secsize;
1304                                                 pp->p_size = size;
1305                                         }
1306                                         /* else already in sectors */
1307                                         if (i != RAW_PART)
1308                                                 total_size += size;
1309                                 }
1310                         }
1311                 }
1312         }
1313
1314         /* Find out the total free space, excluding the boot block area. */
1315         base_offset = BBSIZE / lp->d_secsize;
1316         free_space = 0;
1317         for (i = 0; i < lp->d_npartitions; i++) {
1318                 pp = &lp->d_partitions[i];
1319                 if (!part_set[i] || i == RAW_PART ||
1320                     part_size_type[i] == '%' || part_size_type[i] == '*')
1321                         continue;
1322                 if (pp->p_offset > base_offset)
1323                         free_space += pp->p_offset - base_offset;
1324                 if (pp->p_offset + pp->p_size > base_offset)
1325                         base_offset = pp->p_offset + pp->p_size;
1326         }
1327         if (base_offset < lp->d_secperunit)
1328                 free_space += lp->d_secperunit - base_offset;
1329
1330         /* handle % partitions - note %'s don't need to add up to 100! */
1331         if (total_percent != 0) {
1332                 if (total_percent > 100) {
1333                         fprintf(stderr,"total percentage %lu is greater than 100\n",
1334                             total_percent);
1335                         errors++;
1336                 }
1337
1338                 if (free_space > 0) {
1339                         for (i = 0; i < lp->d_npartitions; i++) {
1340                                 pp = &lp->d_partitions[i];
1341                                 if (part_set[i] && part_size_type[i] == '%') {
1342                                         /* careful of overflows! and integer roundoff */
1343                                         pp->p_size = ((double)pp->p_size/100) * free_space;
1344                                         total_size += pp->p_size;
1345
1346                                         /* FIX we can lose a sector or so due to roundoff per
1347                                            partition.  A more complex algorithm could avoid that */
1348                                 }
1349                         }
1350                 } else {
1351                         fprintf(stderr,
1352                             "%ld sectors available to give to '*' and '%%' partitions\n",
1353                             free_space);
1354                         errors++;
1355                         /* fix?  set all % partitions to size 0? */
1356                 }
1357         }
1358         /* give anything remaining to the hog partition */
1359         if (hog_part != -1) {
1360                 /*
1361                  * Find the range of offsets usable by '*' partitions around
1362                  * the hog partition and how much space they need.
1363                  */
1364                 needed = 0;
1365                 base_offset = BBSIZE / lp->d_secsize;
1366                 for (i = hog_part - 1; i >= 0; i--) {
1367                         pp = &lp->d_partitions[i];
1368                         if (!part_set[i] || i == RAW_PART)
1369                                 continue;
1370                         if (part_offset_type[i] == '*') {
1371                                 needed += pp->p_size;
1372                                 continue;
1373                         }
1374                         base_offset = pp->p_offset + pp->p_size;
1375                         break;
1376                 }
1377                 current_offset = lp->d_secperunit;
1378                 for (i = lp->d_npartitions - 1; i > hog_part; i--) {
1379                         pp = &lp->d_partitions[i];
1380                         if (!part_set[i] || i == RAW_PART)
1381                                 continue;
1382                         if (part_offset_type[i] == '*') {
1383                                 needed += pp->p_size;
1384                                 continue;
1385                         }
1386                         current_offset = pp->p_offset;
1387                 }
1388
1389                 if (current_offset - base_offset <= needed) {
1390                         fprintf(stderr, "Cannot find space for partition %c\n",
1391                             hog_part + 'a');
1392                         fprintf(stderr,
1393                             "Need more than %lu sectors between %lu and %lu\n",
1394                             needed, base_offset, current_offset);
1395                         errors++;
1396                         lp->d_partitions[hog_part].p_size = 0;
1397                 } else {
1398                         lp->d_partitions[hog_part].p_size = current_offset -
1399                             base_offset - needed;
1400                         total_size += lp->d_partitions[hog_part].p_size;
1401                 }
1402         }
1403
1404         /* Now set the offsets for each partition */
1405         current_offset = BBSIZE / lp->d_secsize; /* in sectors */
1406         seen_default_offset = 0;
1407         for (i = 0; i < lp->d_npartitions; i++) {
1408                 part = 'a' + i;
1409                 pp = &lp->d_partitions[i];
1410                 if (part_set[i]) {
1411                         if (part_offset_type[i] == '*') {
1412                                 if (i == RAW_PART) {
1413                                         pp->p_offset = 0;
1414                                 } else {
1415                                         pp->p_offset = current_offset;
1416                                         seen_default_offset = 1;
1417                                 }
1418                         } else {
1419                                 /* allow them to be out of order for old-style tables */
1420                                 if (pp->p_offset < current_offset &&
1421                                     seen_default_offset && i != RAW_PART &&
1422                                     pp->p_fstype != FS_VINUM) {
1423                                         fprintf(stderr,
1424 "Offset %ld for partition %c overlaps previous partition which ends at %lu\n",
1425                                             (long)pp->p_offset,i+'a',current_offset);
1426                                         fprintf(stderr,
1427 "Labels with any *'s for offset must be in ascending order by sector\n");
1428                                         errors++;
1429                                 } else if (pp->p_offset != current_offset &&
1430                                     i != RAW_PART && seen_default_offset) {
1431                                         /*
1432                                          * this may give unneeded warnings if
1433                                          * partitions are out-of-order
1434                                          */
1435                                         Warning(
1436 "Offset %ld for partition %c doesn't match expected value %ld",
1437                                             (long)pp->p_offset, i + 'a', current_offset);
1438                                 }
1439                         }
1440                         if (i != RAW_PART)
1441                                 current_offset = pp->p_offset + pp->p_size;
1442                 }
1443         }
1444
1445         for (i = 0; i < lp->d_npartitions; i++) {
1446                 part = 'a' + i;
1447                 pp = &lp->d_partitions[i];
1448                 if (pp->p_size == 0 && pp->p_offset != 0)
1449                         Warning("partition %c: size 0, but offset %lu",
1450                             part, (u_long)pp->p_offset);
1451 #ifdef notdef
1452                 if (pp->p_size % lp->d_secpercyl)
1453                         Warning("partition %c: size %% cylinder-size != 0",
1454                             part);
1455                 if (pp->p_offset % lp->d_secpercyl)
1456                         Warning("partition %c: offset %% cylinder-size != 0",
1457                             part);
1458 #endif
1459                 if (pp->p_offset > lp->d_secperunit) {
1460                         fprintf(stderr,
1461                             "partition %c: offset past end of unit\n", part);
1462                         errors++;
1463                 }
1464                 if (pp->p_offset + pp->p_size > lp->d_secperunit) {
1465                         fprintf(stderr,
1466                         "partition %c: partition extends past end of unit\n",
1467                             part);
1468                         errors++;
1469                 }
1470                 if (i == RAW_PART)
1471                 {
1472                         if (pp->p_fstype != FS_UNUSED)
1473                                 Warning("partition %c is not marked as unused!",part);
1474                         if (pp->p_offset != 0)
1475                                 Warning("partition %c doesn't start at 0!",part);
1476                         if (pp->p_size != lp->d_secperunit)
1477                                 Warning("partition %c doesn't cover the whole unit!",part);
1478
1479                         if ((pp->p_fstype != FS_UNUSED) || (pp->p_offset != 0) ||
1480                             (pp->p_size != lp->d_secperunit)) {
1481                                 Warning("An incorrect partition %c may cause problems for "
1482                                     "standard system utilities",part);
1483                         }
1484                 }
1485
1486                 /* check for overlaps */
1487                 /* this will check for all possible overlaps once and only once */
1488                 for (j = 0; j < i; j++) {
1489                         pp2 = &lp->d_partitions[j];
1490                         if (j != RAW_PART && i != RAW_PART &&
1491                             pp->p_fstype != FS_VINUM &&
1492                             pp2->p_fstype != FS_VINUM &&
1493                             part_set[i] && part_set[j]) {
1494                                 if (pp2->p_offset < pp->p_offset + pp->p_size &&
1495                                     (pp2->p_offset + pp2->p_size > pp->p_offset ||
1496                                         pp2->p_offset >= pp->p_offset)) {
1497                                         fprintf(stderr,"partitions %c and %c overlap!\n",
1498                                             j + 'a', i + 'a');
1499                                         errors++;
1500                                 }
1501                         }
1502                 }
1503         }
1504         for (; i < 8 || i < lp->d_npartitions; i++) {
1505                 part = 'a' + i;
1506                 pp = &lp->d_partitions[i];
1507                 if (pp->p_size || pp->p_offset)
1508                         Warning("unused partition %c: size %d offset %lu",
1509                             'a' + i, pp->p_size, (u_long)pp->p_offset);
1510         }
1511         return (errors);
1512 }
1513
1514 /*
1515  * When operating on a "virgin" disk, try getting an initial label
1516  * from the associated device driver.  This might work for all device
1517  * drivers that are able to fetch some initial device parameters
1518  * without even having access to a (BSD) disklabel, like SCSI disks,
1519  * most IDE drives, or vn devices.
1520  */
1521 static struct disklabel32 dlab;
1522
1523 struct disklabel32 *
1524 getvirginlabel(void)
1525 {
1526         struct partinfo info;
1527         struct disklabel32 *dl = &dlab;
1528         int f;
1529
1530         if ((f = open(dkname, O_RDONLY)) == -1) {
1531                 warn("cannot open %s", dkname);
1532                 return (NULL);
1533         }
1534
1535         /*
1536          * Check to see if the media is too big for a 32 bit disklabel.
1537          */
1538         if (ioctl(f, DIOCGPART, &info) == 0) {
1539                  if (info.media_size >= 0x100000000ULL * 512) {
1540                         warnx("The media is too large for a 32 bit disklabel,"
1541                               " please use disklabel64.");
1542                         return (NULL);
1543                  }
1544         }
1545
1546         /*
1547          * Generate a virgin disklabel via ioctl
1548          */
1549         if (ioctl(f, DIOCGDVIRGIN32, dl) < 0) {
1550                 l_perror("ioctl DIOCGDVIRGIN32");
1551                 close(f);
1552                 return(NULL);
1553         }
1554         close(f);
1555         return (dl);
1556 }
1557
1558 struct disklabel32 *
1559 getdisklabelfromdisktab(const char *name)
1560 {
1561         struct disktab *dt;
1562         struct disklabel32 *dl = &dlab;
1563         int i;
1564
1565         if ((dt = getdisktabbyname(name)) == NULL)
1566                 return(NULL);
1567         dl->d_magic = DISKMAGIC32;
1568         dl->d_type = dt->d_typeid;
1569         dl->d_subtype = 0;
1570         dl->d_secsize = dt->d_media_blksize;
1571         dl->d_nsectors = dt->d_secpertrack;
1572         dl->d_ntracks = dt->d_nheads;
1573         dl->d_ncylinders = dt->d_ncylinders;
1574         dl->d_secpercyl = dt->d_secpercyl;
1575         dl->d_secperunit = dt->d_media_blocks;
1576         dl->d_rpm = dt->d_rpm;
1577         dl->d_interleave = dt->d_interleave;
1578         dl->d_trackskew = dt->d_trackskew;
1579         dl->d_cylskew = dt->d_cylskew;
1580         dl->d_headswitch = dt->d_headswitch;
1581         dl->d_trkseek = dt->d_trkseek;
1582         dl->d_magic2 = DISKMAGIC32;
1583         dl->d_npartitions = dt->d_npartitions;
1584         dl->d_bbsize = dt->d_bbsize;
1585         dl->d_sbsize = dt->d_sbsize;
1586         for (i = 0; i < dt->d_npartitions; ++i) {
1587                 struct partition32 *dlp = &dl->d_partitions[i];
1588                 struct dt_partition *dtp = &dt->d_partitions[i];
1589
1590                 dlp->p_size     = dtp->p_size;
1591                 dlp->p_offset   = dtp->p_offset;
1592                 dlp->p_fsize    = dtp->p_fsize;
1593                 dlp->p_fstype   = dtp->p_fstype;
1594                 dlp->p_frag     = dtp->p_fsize;
1595         }
1596         return(dl);
1597 }
1598
1599 /*
1600  * If we are installing a boot program that doesn't fit in d_bbsize
1601  * we need to mark those partitions that the boot overflows into.
1602  * This allows newfs to prevent creation of a filesystem where it might
1603  * clobber bootstrap code.
1604  */
1605 void
1606 setbootflag(struct disklabel32 *lp)
1607 {
1608         struct partition32 *pp;
1609         int i, errors = 0;
1610         char part;
1611         u_long boffset;
1612
1613         if (bootbuf == 0)
1614                 return;
1615         boffset = bootsize / lp->d_secsize;
1616         for (i = 0; i < lp->d_npartitions; i++) {
1617                 part = 'a' + i;
1618                 pp = &lp->d_partitions[i];
1619                 if (pp->p_size == 0)
1620                         continue;
1621                 if (boffset <= pp->p_offset) {
1622                         if (pp->p_fstype == FS_BOOT)
1623                                 pp->p_fstype = FS_UNUSED;
1624                 } else if (pp->p_fstype != FS_BOOT) {
1625                         if (pp->p_fstype != FS_UNUSED) {
1626                                 fprintf(stderr,
1627                                         "boot overlaps used partition %c\n",
1628                                         part);
1629                                 errors++;
1630                         } else {
1631                                 pp->p_fstype = FS_BOOT;
1632                                 Warning("boot overlaps partition %c, %s",
1633                                         part, "marked as FS_BOOT");
1634                         }
1635                 }
1636         }
1637         if (errors)
1638                 errx(4, "cannot install boot program");
1639 }
1640
1641 /*VARARGS1*/
1642 void
1643 Warning(const char *fmt, ...)
1644 {
1645         va_list ap;
1646
1647         fprintf(stderr, "Warning, ");
1648         va_start(ap, fmt);
1649         vfprintf(stderr, fmt, ap);
1650         fprintf(stderr, "\n");
1651         va_end(ap);
1652 }
1653
1654 /*
1655  * Check to see if the bootblocks are in the wrong place.  FBsd5 bootblocks
1656  * and earlier DFly bb's are packed against the old disklabel and a new
1657  * disklabel would blow them up.  This is a hack that should be removed
1658  * in 2006 sometime (if ever).
1659  */
1660
1661 int
1662 checkoldboot(int f, const char *bootbuffer)
1663 {
1664         char buf[BBSIZE];
1665
1666         if (bootbuffer && strncmp(bootbuffer + 0x402, "BTX", 3) == 0)
1667                 return(0);
1668         lseek(f, (off_t)0, SEEK_SET);
1669         if (read(f, buf, sizeof(buf)) != sizeof(buf))
1670                 return(0);
1671         if (strncmp(buf + 0x402, "BTX", 3) == 0)  /* new location */
1672                 return(0);
1673         if (strncmp(buf + 0x316, "BTX", 3) == 0)  /* old location */
1674                 return(1);
1675         return(0);
1676 }
1677
1678 /*
1679  * Traditional 32 bit disklabels actually use absolute sector numbers on
1680  * disk, NOT slice relative sector numbres.   The OS hides this from us
1681  * when we use DIOC ioctls to access the label, but newer versions of
1682  * Dragonfly no longer adjusts the disklabel when snooping reads or writes
1683  * so we have to figure it out ourselves.
1684  */
1685 const char *
1686 fixlabel(int f, struct disklabel32 *lp, int writeadj)
1687 {
1688         const char *msg = NULL;
1689         struct partinfo info;
1690         struct partition32 *pp;
1691         u_int64_t start;
1692         u_int64_t end;
1693         u_int64_t offset;
1694         int part;
1695         int rev;
1696         size_t rev_len = sizeof(rev);
1697
1698         if (sysctlbyname("kern.osrevision", &rev, &rev_len, NULL, 0) < 0) {
1699                 errx(1, "Cannot use raw mode on non-DragonFly systems\n");
1700         }
1701         if (rev < 200701) {
1702                 warnx("Warning running new disklabel on old DragonFly systems,\n"
1703                       "assuming the disk layer will fixup the label.\n");
1704                 sleep(3);
1705                 return(NULL);
1706         }
1707
1708         pp = &lp->d_partitions[RAW_PART];
1709
1710         if (forceflag) {
1711                 info.media_offset = slice_start_lba * lp->d_secsize;
1712                 info.media_blocks = pp->p_size;
1713                 info.media_blksize = lp->d_secsize;
1714         } else if (ioctl(f, DIOCGPART, &info) < 0) {
1715                 msg = "Unable to extract the slice starting LBA, "
1716                       "you must use the -f <slice_start_lba> option\n"
1717                       "to specify it manually, or perhaps try without "
1718                       "using -r and let the kernel deal with it\n";
1719                 return(msg);
1720         }
1721
1722         if (lp->d_magic != DISKMAGIC32 || lp->d_magic2 != DISKMAGIC32)
1723                 return ("fixlabel: invalid magic");
1724         if (dkcksum32(lp) != 0)
1725                 return ("fixlabel: invalid checksum");
1726
1727         /*
1728          * What a mess.  For ages old backwards compatibility the disklabel
1729          * on-disk stores absolute offsets instead of slice-relative offsets.
1730          * So fix it up when reading, writing, or snooping.
1731          *
1732          * The in-core label is always slice-relative.
1733          */
1734         if (writeadj) {
1735                 /*
1736                  * incore -> disk
1737                  */
1738                 start = 0;
1739                 offset = info.media_offset / info.media_blksize;
1740         } else {
1741                 /*
1742                  * disk -> incore
1743                  */
1744                 start = info.media_offset / info.media_blksize;
1745                 offset = -info.media_offset / info.media_blksize;
1746         }
1747         if (pp->p_offset != start)
1748                 return ("fixlabel: raw partition offset != slice offset");
1749         if (pp->p_size != info.media_blocks) {
1750                 if (pp->p_size > info.media_blocks)
1751                         return ("fixlabel: raw partition size > slice size");
1752         }
1753         end = start + info.media_blocks;
1754         if (start > end)
1755                 return ("fixlabel: slice wraps");
1756         if (lp->d_secpercyl <= 0)
1757                 return ("fixlabel: d_secpercyl <= 0");
1758         pp -= RAW_PART;
1759         for (part = 0; part < lp->d_npartitions; part++, pp++) {
1760                 if (pp->p_offset != 0 || pp->p_size != 0) {
1761                         if (pp->p_offset < start
1762                             || pp->p_offset + pp->p_size > end
1763                             || pp->p_offset + pp->p_size < pp->p_offset) {
1764                                 /* XXX else silently discard junk. */
1765                                 bzero(pp, sizeof *pp);
1766                         } else {
1767                                 pp->p_offset += offset;
1768                         }
1769                 }
1770         }
1771         lp->d_checksum = 0;
1772         lp->d_checksum = dkcksum32(lp);
1773         return (NULL);
1774 }
1775
1776 void
1777 usage(void)
1778 {
1779 #if NUMBOOT > 0
1780         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",
1781                 "usage: disklabel [-r] disk",
1782                 "\t\t(to read label)",
1783                 "       disklabel -w [-r] [-n] disk type [ packid ]",
1784                 "\t\t(to write label with existing boot program)",
1785                 "       disklabel -e [-r] [-n] disk",
1786                 "\t\t(to edit label)",
1787                 "       disklabel -R [-r] [-n] disk protofile",
1788                 "\t\t(to restore label with existing boot program)",
1789 #if NUMBOOT > 1
1790                 "       disklabel -B [-n] [ -b boot1 [ -s boot2 ] ] disk [ type ]",
1791                 "\t\t(to install boot program with existing label)",
1792                 "       disklabel -w -B [-n] [ -b boot1 [ -s boot2 ] ] disk type [ packid ]",
1793                 "\t\t(to write label and boot program)",
1794                 "       disklabel -R -B [-n] [ -b boot1 [ -s boot2 ] ] disk protofile [ type ]",
1795                 "\t\t(to restore label and boot program)",
1796 #else
1797                 "       disklabel -B [-n] [ -b bootprog ] disk [ type ]",
1798                 "\t\t(to install boot program with existing on-disk label)",
1799                 "       disklabel -w -B [-n] [ -b bootprog ] disk type [ packid ]",
1800                 "\t\t(to write label and install boot program)",
1801                 "       disklabel -R -B [-n] [ -b bootprog ] disk protofile [ type ]",
1802                 "\t\t(to restore label and install boot program)",
1803 #endif
1804                 "       disklabel [-NW] disk",
1805                 "\t\t(to write disable/enable label)");
1806 #else
1807         fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
1808                 "usage: disklabel [-r] disk", "(to read label)",
1809                 "       disklabel -w [-r] [-n] disk type [ packid ]",
1810                 "\t\t(to write label)",
1811                 "       disklabel -e [-r] [-n] disk",
1812                 "\t\t(to edit label)",
1813                 "       disklabel -R [-r] [-n] disk protofile",
1814                 "\t\t(to restore label)",
1815                 "       disklabel [-NW] disk",
1816                 "\t\t(to write disable/enable label)");
1817 #endif
1818         fprintf(stderr, "%s\n%s\n",
1819                 "       disklabel [-f slice_start_lba] [options]",
1820                 "\t\t(to force using manual offset)");
1821         exit(1);
1822 }