sbin/disklabel64/disklabel64.c

   1 /*
   2  * Copyright (c) 2007 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Matthew Dillon <dillon@backplane.com>
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  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
  15  *    the documentation and/or other materials provided with the
  16  *    distribution.
  17  * 3. Neither the name of The DragonFly Project nor the names of its
  18  *    contributors may be used to endorse or promote products derived
  19  *    from this software without specific, prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  24  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  25  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  27  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  28  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  29  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  30  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  31  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  * $DragonFly: src/sbin/disklabel64/disklabel64.c,v 1.2 2007/06/19 06:38:33 dillon Exp $
  35  */
  36 /*
  37  * Copyright (c) 1987, 1993
  38  *      The Regents of the University of California.  All rights reserved.
  39  *
  40  * This code is derived from software contributed to Berkeley by
  41  * Symmetric Computer Systems.
  42  *
  43  * Redistribution and use in source and binary forms, with or without
  44  * modification, are permitted provided that the following conditions
  45  * are met:
  46  * 1. Redistributions of source code must retain the above copyright
  47  *    notice, this list of conditions and the following disclaimer.
  48  * 2. Redistributions in binary form must reproduce the above copyright
  49  *    notice, this list of conditions and the following disclaimer in the
  50  *    documentation and/or other materials provided with the distribution.
  51  * 3. All advertising materials mentioning features or use of this software
  52  *    must display the following acknowledgement:
  53  *      This product includes software developed by the University of
  54  *      California, Berkeley and its contributors.
  55  * 4. Neither the name of the University nor the names of its contributors
  56  *    may be used to endorse or promote products derived from this software
  57  *    without specific prior written permission.
  58  *
  59  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  60  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  61  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  62  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  63  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  64  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  65  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  66  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  67  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  68  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  69  * SUCH DAMAGE.
  70  *
  71  * @(#)disklabel.c      1.2 (Symmetric) 11/28/85
  72  * @(#)disklabel.c      8.2 (Berkeley) 1/7/94
  73  * $FreeBSD: src/sbin/disklabel/disklabel.c,v 1.28.2.15 2003/01/24 16:18:16 des Exp $
  74  * $DragonFly: src/sbin/disklabel64/disklabel64.c,v 1.2 2007/06/19 06:38:33 dillon Exp $
  75  */
  76
  77 #include <sys/param.h>
  78 #include <sys/file.h>
  79 #include <sys/stat.h>
  80 #include <sys/wait.h>
  81 #define DKTYPENAMES
  82 #include <sys/disklabel64.h>
  83 #include <sys/diskslice.h>
  84 #include <sys/diskmbr.h>
  85 #include <sys/dtype.h>
  86 #include <sys/sysctl.h>
  87 #include <disktab.h>
  88
  89 #include <vfs/ufs/dinode.h>
  90 #include <vfs/ufs/fs.h>
  91
  92 #include <unistd.h>
  93 #include <string.h>
  94 #include <stdio.h>
  95 #include <stdlib.h>
  96 #include <signal.h>
  97 #include <stdarg.h>
  98 #include <stddef.h>
  99 #include <ctype.h>
 100 #include <err.h>
 101 #include <errno.h>
 102 #include <disktab.h>
 103 #include <uuid.h>
 104 #include "pathnames.h"
 105
 106 extern uint32_t crc32(const void *buf, size_t size);
 107
 108 /*
 109  * Disklabel: read and write disklabels.
 110  * The label is usually placed on one of the first sectors of the disk.
 111  * Many machines also place a bootstrap in the same area,
 112  * in which case the label is embedded in the bootstrap.
 113  * The bootstrap source must leave space at the proper offset
 114  * for the label on such machines.
 115  */
 116
 117 #define LABELSIZE       ((sizeof(struct disklabel64) + 4095) & ~4095)
 118 #define BOOTSIZE        32768
 119
 120 /* FIX!  These are too low, but are traditional */
 121 #define DEFAULT_NEWFS_BLOCK  8192U
 122 #define DEFAULT_NEWFS_FRAG   1024U
 123 #define DEFAULT_NEWFS_CPG    16U
 124
 125 #define BIG_NEWFS_BLOCK  16384U
 126 #define BIG_NEWFS_FRAG   2048U
 127 #define BIG_NEWFS_CPG    64U
 128
 129 void    makelabel(const char *, const char *, struct disklabel64 *);
 130 int     writelabel(int, struct disklabel64 *);
 131 void    l_perror(const char *);
 132 struct disklabel64 *readlabel(int);
 133 struct disklabel64 *makebootarea(int);
 134 void    display(FILE *, const struct disklabel64 *);
 135 int     edit(struct disklabel64 *, int);
 136 int     editit(void);
 137 char    *skip(char *);
 138 char    *word(char *);
 139 int     getasciilabel(FILE *, struct disklabel64 *);
 140 int     getasciipartspec(char *, struct disklabel64 *, int, int, uint32_t);
 141 int     getasciipartuuid(char *, struct disklabel64 *, int, int, uint32_t);
 142 int     checklabel(struct disklabel64 *);
 143 void    Warning(const char *, ...) __printflike(1, 2);
 144 void    usage(void);
 145 struct disklabel64 *getvirginlabel(void);
 146
 147 #define DEFEDITOR       _PATH_VI
 148 #define streq(a,b)      (strcmp(a,b) == 0)
 149
 150 char    *dkname;
 151 char    *specname;
 152 char    tmpfil[] = PATH_TMPFILE;
 153
 154 struct  disklabel64 lab;
 155
 156 #define MAX_PART ('z')
 157 #define MAX_NUM_PARTS (1 + MAX_PART - 'a')
 158 char    part_size_type[MAX_NUM_PARTS];
 159 char    part_offset_type[MAX_NUM_PARTS];
 160 int     part_set[MAX_NUM_PARTS];
 161
 162 int     installboot;    /* non-zero if we should install a boot program */
 163 int     boot1size;
 164 int     boot1lsize;
 165 int     boot2size;
 166 char    *boot1buf;
 167 char    *boot2buf;
 168 char    *boot1path;
 169 char    *boot2path;
 170
 171 enum    {
 172         UNSPEC, EDIT, NOWRITE, READ, RESTORE, WRITE, WRITEABLE, WRITEBOOT
 173 } op = UNSPEC;
 174
 175 int     rflag;
 176 int     Vflag;
 177 int     disable_write;   /* set to disable writing to disk label */
 178 u_int32_t slice_start_lba;
 179
 180 #ifdef DEBUG
 181 int     debug;
 182 #define OPTIONS "BNRWb:denrs:Vw"
 183 #else
 184 #define OPTIONS "BNRWb:enrs:Vw"
 185 #endif
 186
 187 int
 188 main(int argc, char *argv[])
 189 {
 190         struct disklabel64 *lp;
 191         FILE *t;
 192         int ch, f = 0, flag, error = 0;
 193         char *name = 0;
 194
 195         while ((ch = getopt(argc, argv, OPTIONS)) != -1)
 196                 switch (ch) {
 197                         case 'B':
 198                                 ++installboot;
 199                                 break;
 200                         case 'b':
 201                                 boot1path = optarg;
 202                                 break;
 203
 204                         case 's':
 205                                 boot2path = optarg;
 206                                 break;
 207                         case 'N':
 208                                 if (op != UNSPEC)
 209                                         usage();
 210                                 op = NOWRITE;
 211                                 break;
 212                         case 'n':
 213                                 disable_write = 1;
 214                                 break;
 215                         case 'R':
 216                                 if (op != UNSPEC)
 217                                         usage();
 218                                 op = RESTORE;
 219                                 break;
 220                         case 'W':
 221                                 if (op != UNSPEC)
 222                                         usage();
 223                                 op = WRITEABLE;
 224                                 break;
 225                         case 'e':
 226                                 if (op != UNSPEC)
 227                                         usage();
 228                                 op = EDIT;
 229                                 break;
 230                         case 'V':
 231                                 ++Vflag;
 232                                 break;
 233                         case 'r':
 234                                 ++rflag;
 235                                 break;
 236                         case 'w':
 237                                 if (op != UNSPEC)
 238                                         usage();
 239                                 op = WRITE;
 240                                 break;
 241 #ifdef DEBUG
 242                         case 'd':
 243                                 debug++;
 244                                 break;
 245 #endif
 246                         case '?':
 247                         default:
 248                                 usage();
 249                 }
 250         argc -= optind;
 251         argv += optind;
 252         if (installboot) {
 253                 rflag++;
 254                 if (op == UNSPEC)
 255                         op = WRITEBOOT;
 256         } else {
 257                 if (op == UNSPEC)
 258                         op = READ;
 259                 boot1path = NULL;
 260                 boot2path = NULL;
 261         }
 262         if (argc < 1)
 263                 usage();
 264
 265         dkname = argv[0];
 266         if (dkname[0] != '/') {
 267                 asprintf(&specname, "%s%s", _PATH_DEV, dkname);
 268         } else {
 269                 specname = dkname;
 270         }
 271         f = open(specname, op == READ ? O_RDONLY : O_RDWR);
 272         if (f < 0 && errno == ENOENT && dkname[0] != '/') {
 273                 asprintf(&specname, "%s%s", _PATH_DEV, dkname);
 274                 f = open(specname, op == READ ? O_RDONLY : O_RDWR);
 275         }
 276         if (f < 0)
 277                 err(4, "%s", specname);
 278
 279         switch(op) {
 280
 281         case UNSPEC:
 282                 break;
 283
 284         case EDIT:
 285                 if (argc != 1)
 286                         usage();
 287                 lp = readlabel(f);
 288                 error = edit(lp, f);
 289                 break;
 290
 291         case NOWRITE:
 292                 flag = 0;
 293                 if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0)
 294                         err(4, "ioctl DIOCWLABEL");
 295                 break;
 296
 297         case READ:
 298                 if (argc != 1)
 299                         usage();
 300                 lp = readlabel(f);
 301                 display(stdout, lp);
 302                 error = checklabel(lp);
 303                 break;
 304
 305         case RESTORE:
 306                 if (installboot && argc == 3) {
 307                         makelabel(argv[2], 0, &lab);
 308                         argc--;
 309
 310                         /*
 311                          * We only called makelabel() for its side effect
 312                          * of setting the bootstrap file names.  Discard
 313                          * all changes to `lab' so that all values in the
 314                          * final label come from the ASCII label.
 315                          */
 316                         bzero((char *)&lab, sizeof(lab));
 317                 }
 318                 if (argc != 2)
 319                         usage();
 320                 if (!(t = fopen(argv[1], "r")))
 321                         err(4, "%s", argv[1]);
 322                 if (!getasciilabel(t, &lab))
 323                         exit(1);
 324                 lp = makebootarea(f);
 325                 bcopy(&lab.d_magic, &lp->d_magic,
 326                       sizeof(lab) - offsetof(struct disklabel64, d_magic));
 327                 error = writelabel(f, lp);
 328                 break;
 329
 330         case WRITE:
 331                 if (argc == 3) {
 332                         name = argv[2];
 333                         argc--;
 334                 }
 335                 if (argc != 2)
 336                         usage();
 337                 makelabel(argv[1], name, &lab);
 338                 lp = makebootarea(f);
 339                 bcopy(&lab.d_magic, &lp->d_magic,
 340                       sizeof(lab) - offsetof(struct disklabel64, d_magic));
 341                 if (checklabel(lp) == 0)
 342                         error = writelabel(f, lp);
 343                 break;
 344
 345         case WRITEABLE:
 346                 flag = 1;
 347                 if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0)
 348                         err(4, "ioctl DIOCWLABEL");
 349                 break;
 350
 351         case WRITEBOOT:
 352         {
 353                 struct disklabel64 tlab;
 354
 355                 lp = readlabel(f);
 356                 tlab = *lp;
 357                 if (argc == 2)
 358                         makelabel(argv[1], 0, &lab);
 359                 lp = makebootarea(f);
 360                 bcopy(&tlab.d_magic, &lp->d_magic,
 361                       sizeof(tlab) - offsetof(struct disklabel64, d_magic));
 362                 if (checklabel(lp) == 0)
 363                         error = writelabel(f, lp);
 364                 break;
 365         }
 366         }
 367         exit(error);
 368 }
 369
 370 /*
 371  * Construct a prototype disklabel from /etc/disktab.  As a side
 372  * effect, set the names of the primary and secondary boot files
 373  * if specified.
 374  */
 375 void
 376 makelabel(const char *type, const char *name, struct disklabel64 *lp)
 377 {
 378         struct disklabel64 *dp;
 379
 380         if (strcmp(type, "auto") == 0)
 381                 dp = getvirginlabel();
 382         else
 383                 dp = NULL;
 384         if (dp == NULL)
 385                 errx(1, "%s: unknown disk type", type);
 386         *lp = *dp;
 387
 388         /*
 389          * NOTE: boot control files may no longer be specified in disktab.
 390          */
 391         if (name)
 392                 strncpy(lp->d_packname, name, sizeof(lp->d_packname));
 393 }
 394
 395 int
 396 writelabel(int f, struct disklabel64 *lp)
 397 {
 398         struct disklabel64 *blp;
 399         int flag;
 400         int r;
 401         size_t lpsize;
 402         size_t lpcrcsize;
 403
 404         lpsize = offsetof(struct disklabel64, d_partitions[lp->d_npartitions]);
 405         lpcrcsize = lpsize - offsetof(struct disklabel64, d_magic);
 406
 407         if (disable_write) {
 408                 Warning("write to disk label supressed - label was as follows:");
 409                 display(stdout, lp);
 410                 return (0);
 411         } else {
 412                 lp->d_magic = DISKMAGIC64;
 413                 lp->d_crc = 0;
 414                 lp->d_crc = crc32(&lp->d_magic, lpcrcsize);
 415                 if (rflag) {
 416                         /*
 417                          * Make sure the boot area is not too large
 418                          */
 419                         if (boot2buf) {
 420                                 int lpbsize = (int)(lp->d_pbase - lp->d_bbase);
 421                                 if (lp->d_pbase == 0) {
 422                                         errx(1, "no space was set aside in "
 423                                                 "the disklabel for boot2!");
 424                                 }
 425                                 if (boot2size > lpbsize) {
 426                                         errx(1, "label did not reserve enough "
 427                                                 "space for boot!  %d/%d",
 428                                              boot2size, lpbsize);
 429                                 }
 430                         }
 431
 432                         /*
 433                          * First set the kernel disk label,
 434                          * then write a label to the raw disk.
 435                          * If the SDINFO ioctl fails because it is
 436                          * unimplemented, keep going; otherwise, the kernel
 437                          * consistency checks may prevent us from changing
 438                          * the current (in-core) label.
 439                          */
 440                         if (ioctl(f, DIOCSDINFO64, lp) < 0 &&
 441                                 errno != ENODEV && errno != ENOTTY) {
 442                                 l_perror("ioctl DIOCSDINFO");
 443                                 return (1);
 444                         }
 445                         lseek(f, (off_t)0, SEEK_SET);
 446
 447                         /*
 448                          * The disklabel embeds areas which we may not
 449                          * have wanted to change.  Merge those areas in
 450                          * from disk.
 451                          */
 452                         blp = makebootarea(f);
 453                         if (blp != lp) {
 454                                 bcopy(&lp->d_magic, &blp->d_magic,
 455                                       sizeof(*lp) -
 456                                       offsetof(struct disklabel64, d_magic));
 457                         }
 458
 459                         /*
 460                          * write enable label sector before write
 461                          * (if necessary), disable after writing.
 462                          */
 463                         flag = 1;
 464                         if (ioctl(f, DIOCWLABEL, &flag) < 0)
 465                                 warn("ioctl DIOCWLABEL");
 466
 467                         r = write(f, boot1buf, boot1lsize);
 468                         if (r != (ssize_t)boot1lsize) {
 469                                 warn("write");
 470                                 return (1);
 471                         }
 472                         /*
 473                          * Output the remainder of the disklabel
 474                          */
 475                         if (boot2buf) {
 476                                 lseek(f, lp->d_bbase, 0);
 477                                 r = write(f, boot2buf, boot2size);
 478                                 if (r != boot2size) {
 479                                         warn("write");
 480                                         return(1);
 481                                 }
 482                         }
 483                         flag = 0;
 484                         ioctl(f, DIOCWLABEL, &flag);
 485                 } else if (ioctl(f, DIOCWDINFO64, lp) < 0) {
 486                         l_perror("ioctl DIOCWDINFO64");
 487                         return (1);
 488                 }
 489         }
 490         return (0);
 491 }
 492
 493 void
 494 l_perror(const char *s)
 495 {
 496         switch (errno) {
 497
 498         case ESRCH:
 499                 warnx("%s: no disk label on disk;", s);
 500                 fprintf(stderr, "add \"-r\" to install initial label\n");
 501                 break;
 502
 503         case EINVAL:
 504                 warnx("%s: label magic number or checksum is wrong!", s);
 505                 fprintf(stderr, "(disklabel or kernel is out of date?)\n");
 506                 break;
 507
 508         case EBUSY:
 509                 warnx("%s: open partition would move or shrink", s);
 510                 break;
 511
 512         case ENOATTR:
 513                 warnx("%s: the disk already has a label of a different type,\n"
 514                       "probably a 32 bit disklabel.  It must be cleaned out "
 515                       "first.\n", s);
 516                 break;
 517
 518         default:
 519                 warn((char *)NULL);
 520                 break;
 521         }
 522 }
 523
 524 /*
 525  * Fetch disklabel for disk.
 526  * Use ioctl to get label unless -r flag is given.
 527  */
 528 struct disklabel64 *
 529 readlabel(int f)
 530 {
 531         struct disklabel64 *lp;
 532         u_int32_t savecrc;
 533         size_t lpcrcsize;
 534
 535         if (rflag) {
 536                 /*
 537                  * Allocate space for the label.  The boot1 code, if any,
 538                  * is embedded in the label.  The label overlaps the boot1
 539                  * code.
 540                  */
 541                 lp = makebootarea(f);
 542                 lpcrcsize = offsetof(struct disklabel64,
 543                                      d_partitions[lp->d_npartitions]) -
 544                             offsetof(struct disklabel64, d_magic);
 545                 savecrc = lp->d_crc;
 546                 lp->d_crc = 0;
 547                 if (lp->d_magic != DISKMAGIC64)
 548                         errx(1, "bad pack magic number");
 549                 if (lp->d_npartitions > MAXPARTITIONS64 ||
 550                     savecrc != crc32(&lp->d_magic, lpcrcsize)
 551                 ) {
 552                         errx(1, "corrupted disklabel64");
 553                 }
 554                 lp->d_crc = savecrc;
 555         } else {
 556                 /*
 557                  * Just use a static structure to hold the label.  Note
 558                  * that DIOCSDINFO64 does not overwrite the boot1 area
 559                  * even though it is part of the disklabel64 structure.
 560                  */
 561                 lp = &lab;
 562                 if (Vflag) {
 563                         if (ioctl(f, DIOCGDVIRGIN64, lp) < 0) {
 564                                 l_perror("ioctl DIOCGDVIRGIN64");
 565                                 exit(4);
 566                         }
 567                 } else {
 568                         if (ioctl(f, DIOCGDINFO64, lp) < 0) {
 569                                 l_perror("ioctl DIOCGDINFO64");
 570                                 exit(4);
 571                         }
 572                 }
 573         }
 574         return (lp);
 575 }
 576
 577 /*
 578  * Construct a boot area for boot1 and boot2 and return the location of
 579  * the label within the area.  The caller will overwrite the label so
 580  * we don't actually have to read it.
 581  */
 582 struct disklabel64 *
 583 makebootarea(int f)
 584 {
 585         struct disklabel64 *lp;
 586         struct partinfo info;
 587         u_int32_t secsize;
 588         struct stat st;
 589         int fd;
 590         int r;
 591
 592         if (ioctl(f, DIOCGPART, &info) == 0)
 593                 secsize = info.media_blksize;
 594         else
 595                 secsize = 512;
 596
 597         if (boot1buf == NULL) {
 598                 size_t rsize;
 599
 600                 rsize = (sizeof(struct disklabel64) + secsize - 1) &
 601                         ~(secsize - 1);
 602                 boot1size = offsetof(struct disklabel64, d_magic);
 603                 boot1lsize = rsize;
 604                 boot1buf = malloc(rsize);
 605                 bzero(boot1buf, rsize);
 606                 r = read(f, boot1buf, rsize);
 607                 if (r != (int)rsize)
 608                         err(4, "%s", specname);
 609         }
 610         lp = (void *)boot1buf;
 611
 612         if (installboot == 0)
 613                 return(lp);
 614
 615         if (boot2buf == NULL) {
 616                 boot2size = 32768;
 617                 boot2buf = malloc(boot2size);
 618                 bzero(boot2buf, boot2size);
 619         }
 620
 621         /*
 622          * If installing the boot code, read it into the appropriate portions
 623          * of the buffer(s)
 624          */
 625         if (boot1path == NULL)
 626                 asprintf(&boot1path, "%s/boot1_64", _PATH_BOOTDIR);
 627         if (boot2path == NULL)
 628                 asprintf(&boot2path, "%s/boot2_64", _PATH_BOOTDIR);
 629
 630         if ((fd = open(boot1path, O_RDONLY)) < 0)
 631                 err(4, "%s", boot1path);
 632         if (fstat(fd, &st) < 0)
 633                 err(4, "%s", boot1path);
 634         if (st.st_size > boot1size)
 635                 err(4, "%s must be exactly %d bytes!", boot1path, boot1size);
 636         if (read(fd, boot1buf, boot1size) != boot1size)
 637                 err(4, "%s must be exactly %d bytes!", boot1path, boot1size);
 638         close(fd);
 639
 640         if ((fd = open(boot2path, O_RDONLY)) < 0)
 641                 err(4, "%s", boot2path);
 642         if (fstat(fd, &st) < 0)
 643                 err(4, "%s", boot2path);
 644         if (st.st_size > boot2size)
 645                 err(4, "%s must be <= %d bytes!", boot2path, boot2size);
 646         if ((r = read(fd, boot2buf, boot2size)) < 1)
 647                 err(4, "%s is empty!", boot2path);
 648         boot2size = (r + secsize - 1) & ~(secsize - 1);
 649         close(fd);
 650
 651         /*
 652          * XXX dangerously dedicated support goes here XXX
 653          */
 654         return (lp);
 655 }
 656
 657 void
 658 display(FILE *f, const struct disklabel64 *lp)
 659 {
 660         const struct partition64 *pp;
 661         char *str;
 662         unsigned int part;
 663         int didany;
 664         uint32_t blksize;
 665
 666         /*
 667          * Use a human readable block size if possible.  This is for
 668          * display and editing purposes only.
 669          */
 670         if (lp->d_align > 1024)
 671                 blksize = 1024;
 672         else
 673                 blksize = lp->d_align;
 674
 675         fprintf(f, "# %s:\n", specname);
 676         fprintf(f, "#\n");
 677         fprintf(f, "# Informational fields calculated from the above\n");
 678         fprintf(f, "# All byte equivalent offsets must be aligned\n");
 679         fprintf(f, "#\n");
 680         fprintf(f, "# boot space: %10llu bytes\n", lp->d_pbase - lp->d_bbase);
 681         fprintf(f, "# data space: %10llu blocks\t# %6.2f MB (%llu bytes)\n",
 682                         (lp->d_pstop - lp->d_pbase) / blksize,
 683                         (double)(lp->d_pstop - lp->d_pbase) / 1024.0 / 1024.0,
 684                         lp->d_pstop - lp->d_pbase);
 685         fprintf(f, "#\n");
 686
 687         uuid_to_string(&lp->d_stor_uuid, &str, NULL);
 688         fprintf(f, "diskid: %s\n", str ? str : "<unknown>");
 689         free(str);
 690
 691         fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname),
 692                 lp->d_packname);
 693         fprintf(f, "boot2 data base:      0x%012llx\n", lp->d_bbase);
 694         fprintf(f, "partitions data base: 0x%012llx\n", lp->d_pbase);
 695         fprintf(f, "partitions data stop: 0x%012llx\n", lp->d_pstop);
 696         fprintf(f, "backup label:         0x%012llx\n", lp->d_abase);
 697         fprintf(f, "total size:           0x%012llx\t# %6.2f MB\n",
 698                 lp->d_total_size,
 699                 (double)lp->d_total_size / 1024.0 / 1024.0);
 700         fprintf(f, "alignment: %u\n", lp->d_align);
 701         fprintf(f, "display block size: %u\t# for partition display only\n",
 702                 blksize);
 703
 704         fprintf(f, "\n");
 705         fprintf(f, "%u partitions:\n", lp->d_npartitions);
 706         fprintf(f, "#          size     offset    fstype   fsuuid\n");
 707         didany = 0;
 708         for (part = 0; part < lp->d_npartitions; part++) {
 709                 pp = &lp->d_partitions[part];
 710                 const u_long onemeg = 1024 * 1024;
 711
 712                 if (pp->p_bsize == 0)
 713                         continue;
 714                 didany = 1;
 715                 fprintf(f, "  %c: ", 'a' + part);
 716
 717                 if (pp->p_bsize % lp->d_align)
 718                     fprintf(f, "%10s  ", "ILLEGAL");
 719                 else
 720                     fprintf(f, "%10llu ", pp->p_bsize / blksize);
 721                 if (pp->p_boffset % lp->d_align)
 722                     fprintf(f, "%10s  ", "ILLEGAL");
 723                 else
 724                     fprintf(f, "%10llu  ", (pp->p_boffset - lp->d_pbase) / blksize);
 725                 if (pp->p_fstype < FSMAXTYPES)
 726                         fprintf(f, "%8.8s", fstypenames[pp->p_fstype]);
 727                 else
 728                         fprintf(f, "%8d", pp->p_fstype);
 729                 fprintf(f, "\t# %11.3fM", (double)pp->p_bsize / onemeg);
 730                 fprintf(f, "\n");
 731         }
 732         for (part = 0; part < lp->d_npartitions; part++) {
 733                 pp = &lp->d_partitions[part];
 734
 735                 if (pp->p_bsize == 0)
 736                         continue;
 737
 738                 if (uuid_is_nil(&lp->d_stor_uuid, NULL) == 0) {
 739                         fprintf(f, "  %c-stor_uuid: ", 'a' + part);
 740                         str = NULL;
 741                         uuid_to_string(&pp->p_stor_uuid, &str, NULL);
 742                         if (str) {
 743                                 fprintf(f, "%s", str);
 744                                 free(str);
 745                         }
 746                         fprintf(f, "\n");
 747                 }
 748         }
 749         if (didany == 0) {
 750                 fprintf(f, "# EXAMPLE\n");
 751                 fprintf(f, "#a:          4g          0    4.2BSD\n");
 752                 fprintf(f, "#a:          *           *    4.2BSD\n");
 753
 754         }
 755         fflush(f);
 756 }
 757
 758 int
 759 edit(struct disklabel64 *lp, int f)
 760 {
 761         int c, fd;
 762         struct disklabel64 label;
 763         FILE *fp;
 764
 765         if ((fd = mkstemp(tmpfil)) == -1 ||
 766             (fp = fdopen(fd, "w")) == NULL) {
 767                 warnx("can't create %s", tmpfil);
 768                 return (1);
 769         }
 770         display(fp, lp);
 771         fclose(fp);
 772         for (;;) {
 773                 if (!editit())
 774                         break;
 775                 fp = fopen(tmpfil, "r");
 776                 if (fp == NULL) {
 777                         warnx("can't reopen %s for reading", tmpfil);
 778                         break;
 779                 }
 780                 bzero((char *)&label, sizeof(label));
 781                 if (getasciilabel(fp, &label)) {
 782                         *lp = label;
 783                         if (writelabel(f, lp) == 0) {
 784                                 fclose(fp);
 785                                 unlink(tmpfil);
 786                                 return (0);
 787                         }
 788                 }
 789                 fclose(fp);
 790                 printf("re-edit the label? [y]: "); fflush(stdout);
 791                 c = getchar();
 792                 if (c != EOF && c != (int)'\n')
 793                         while (getchar() != (int)'\n')
 794                                 ;
 795                 if  (c == (int)'n')
 796                         break;
 797         }
 798         unlink(tmpfil);
 799         return (1);
 800 }
 801
 802 int
 803 editit(void)
 804 {
 805         int pid, xpid;
 806         int status, omask;
 807         const char *ed;
 808
 809         omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP));
 810         while ((pid = fork()) < 0) {
 811                 if (errno == EPROCLIM) {
 812                         warnx("you have too many processes");
 813                         return(0);
 814                 }
 815                 if (errno != EAGAIN) {
 816                         warn("fork");
 817                         return(0);
 818                 }
 819                 sleep(1);
 820         }
 821         if (pid == 0) {
 822                 sigsetmask(omask);
 823                 setgid(getgid());
 824                 setuid(getuid());
 825                 if ((ed = getenv("EDITOR")) == (char *)0)
 826                         ed = DEFEDITOR;
 827                 execlp(ed, ed, tmpfil, (char *)0);
 828                 err(1, "%s", ed);
 829         }
 830         while ((xpid = wait(&status)) >= 0)
 831                 if (xpid == pid)
 832                         break;
 833         sigsetmask(omask);
 834         return(!status);
 835 }
 836
 837 char *
 838 skip(char *cp)
 839 {
 840
 841         while (*cp != '\0' && isspace(*cp))
 842                 cp++;
 843         if (*cp == '\0' || *cp == '#')
 844                 return (NULL);
 845         return (cp);
 846 }
 847
 848 char *
 849 word(char *cp)
 850 {
 851         char c;
 852
 853         while (*cp != '\0' && !isspace(*cp) && *cp != '#')
 854                 cp++;
 855         if ((c = *cp) != '\0') {
 856                 *cp++ = '\0';
 857                 if (c != '#')
 858                         return (skip(cp));
 859         }
 860         return (NULL);
 861 }
 862
 863 /*
 864  * Read an ascii label in from fd f,
 865  * in the same format as that put out by display(),
 866  * and fill in lp.
 867  */
 868 int
 869 getasciilabel(FILE *f, struct disklabel64 *lp)
 870 {
 871         char *cp;
 872         u_int part;
 873         char *tp, line[BUFSIZ];
 874         u_long v;
 875         uint32_t blksize = 0;
 876         uint64_t vv;
 877         int lineno = 0, errors = 0;
 878         char empty[] = "";
 879
 880         bzero(&part_set, sizeof(part_set));
 881         bzero(&part_size_type, sizeof(part_size_type));
 882         bzero(&part_offset_type, sizeof(part_offset_type));
 883         while (fgets(line, sizeof(line) - 1, f)) {
 884                 lineno++;
 885                 if ((cp = strchr(line,'\n')) != 0)
 886                         *cp = '\0';
 887                 cp = skip(line);
 888                 if (cp == NULL)
 889                         continue;
 890                 tp = strchr(cp, ':');
 891                 if (tp == NULL) {
 892                         fprintf(stderr, "line %d: syntax error\n", lineno);
 893                         errors++;
 894                         continue;
 895                 }
 896                 *tp++ = '\0', tp = skip(tp);
 897                 if (sscanf(cp, "%lu partitions", &v) == 1) {
 898                         if (v == 0 || v > MAXPARTITIONS64) {
 899                                 fprintf(stderr,
 900                                     "line %d: bad # of partitions\n", lineno);
 901                                 lp->d_npartitions = MAXPARTITIONS64;
 902                                 errors++;
 903                         } else
 904                                 lp->d_npartitions = v;
 905                         continue;
 906                 }
 907                 if (tp == NULL)
 908                         tp = empty;
 909
 910                 if (streq(cp, "diskid")) {
 911                         uint32_t status = 0;
 912                         uuid_from_string(tp, &lp->d_stor_uuid, &status);
 913                         if (status != uuid_s_ok) {
 914                                 fprintf(stderr,
 915                                     "line %d: %s: illegal UUID\n",
 916                                     lineno, tp);
 917                                 errors++;
 918                         }
 919                         continue;
 920                 }
 921                 if (streq(cp, "label")) {
 922                         strncpy(lp->d_packname, tp, sizeof (lp->d_packname));
 923                         continue;
 924                 }
 925
 926                 if (streq(cp, "alignment")) {
 927                         v = strtoul(tp, NULL, 0);
 928                         if (v <= 0 || (v & DEV_BMASK) != 0 || v > 1024*1024) {
 929                                 fprintf(stderr,
 930                                     "line %d: %s: bad alignment\n",
 931                                     lineno, tp);
 932                                 errors++;
 933                         } else {
 934                                 lp->d_align = v;
 935                         }
 936                         continue;
 937                 }
 938                 if (streq(cp, "total size")) {
 939                         vv = strtoull(tp, NULL, 0);
 940                         if (vv == 0 || vv == (uint64_t)-1) {
 941                                 fprintf(stderr, "line %d: %s: bad %s\n",
 942                                     lineno, tp, cp);
 943                                 errors++;
 944                         } else {
 945                                 lp->d_total_size = vv;
 946                         }
 947                         continue;
 948                 }
 949                 if (streq(cp, "boot2 data base")) {
 950                         vv = strtoull(tp, NULL, 0);
 951                         if (vv == 0 || vv == (uint64_t)-1) {
 952                                 fprintf(stderr, "line %d: %s: bad %s\n",
 953                                     lineno, tp, cp);
 954                                 errors++;
 955                         } else {
 956                                 lp->d_bbase = vv;
 957                         }
 958                         continue;
 959                 }
 960                 if (streq(cp, "partitions data base")) {
 961                         vv = strtoull(tp, NULL, 0);
 962                         if (vv == 0 || vv == (uint64_t)-1) {
 963                                 fprintf(stderr, "line %d: %s: bad %s\n",
 964                                     lineno, tp, cp);
 965                                 errors++;
 966                         } else {
 967                                 lp->d_pbase = vv;
 968                         }
 969                         continue;
 970                 }
 971                 if (streq(cp, "partitions data stop")) {
 972                         vv = strtoull(tp, NULL, 0);
 973                         if (vv == 0 || vv == (uint64_t)-1) {
 974                                 fprintf(stderr, "line %d: %s: bad %s\n",
 975                                     lineno, tp, cp);
 976                                 errors++;
 977                         } else {
 978                                 lp->d_pstop = vv;
 979                         }
 980                         continue;
 981                 }
 982                 if (streq(cp, "backup label")) {
 983                         vv = strtoull(tp, NULL, 0);
 984                         if (vv == 0 || vv == (uint64_t)-1) {
 985                                 fprintf(stderr, "line %d: %s: bad %s\n",
 986                                     lineno, tp, cp);
 987                                 errors++;
 988                         } else {
 989                                 lp->d_abase = vv;
 990                         }
 991                         continue;
 992                 }
 993                 if (streq(cp, "display block size")) {
 994                         v = strtoul(tp, NULL, 0);
 995                         if (v <= 0 || (v & DEV_BMASK) != 0 || v > 1024*1024) {
 996                                 fprintf(stderr,
 997                                     "line %d: %s: bad alignment\n",
 998                                     lineno, tp);
 999                                 errors++;
1000                         } else {
1001                                 blksize = v;
1002                         }
1003                         continue;
1004                 }
1005
1006                 /* the ':' was removed above */
1007
1008                 /*
1009                  * Handle main partition data, e.g. a:, b:, etc.
1010                  */
1011                 if (*cp < 'a' || *cp > MAX_PART) {
1012                         fprintf(stderr,
1013                             "line %d: %s: Unknown disklabel field\n", lineno,
1014                             cp);
1015                         errors++;
1016                         continue;
1017                 }
1018
1019                 /* Process a partition specification line. */
1020                 part = *cp - 'a';
1021                 if (part >= lp->d_npartitions) {
1022                         fprintf(stderr,
1023                             "line %d: partition name out of range a-%c: %s\n",
1024                             lineno, 'a' + lp->d_npartitions - 1, cp);
1025                         errors++;
1026                         continue;
1027                 }
1028
1029                 if (blksize == 0) {
1030                         fprintf(stderr, "block size to use for partition "
1031                                         "display was not specified!\n");
1032                         errors++;
1033                         continue;
1034                 }
1035
1036                 if (strcmp(cp + 1, "-stor_uuid") == 0) {
1037                         if (getasciipartuuid(tp, lp, part, lineno, blksize)) {
1038                                 errors++;
1039                                 break;
1040                         }
1041                         continue;
1042                 } else if (cp[1] == 0) {
1043                         part_set[part] = 1;
1044                         if (getasciipartspec(tp, lp, part, lineno, blksize)) {
1045                                 errors++;
1046                                 break;
1047                         }
1048                         continue;
1049                 }
1050                 fprintf(stderr, "line %d: %s: Unknown disklabel field\n",
1051                         lineno, cp);
1052                 errors++;
1053                 continue;
1054         }
1055         errors += checklabel(lp);
1056         return (errors == 0);
1057 }
1058
1059 static
1060 int
1061 parse_field_val(char **tp, char **cp, u_int64_t *vv, int lineno)
1062 {
1063         char *tmp;
1064
1065         if (*tp == NULL || **tp == 0) {
1066                 fprintf(stderr, "line %d: too few numeric fields\n", lineno);
1067                 return(-1);
1068         }
1069         *cp = *tp;
1070         *tp = word(*cp);
1071         *vv = strtoull(*cp, &tmp, 0);
1072         if (*vv == ULLONG_MAX) {
1073                 fprintf(stderr, "line %d: illegal number\n", lineno);
1074                 return(-1);
1075         }
1076         if (tmp)
1077                 return(*tmp);
1078         else
1079                 return(0);
1080 }
1081
1082 /*
1083  * Read a partition line into partition `part' in the specified disklabel.
1084  * Return 0 on success, 1 on failure.
1085  */
1086 int
1087 getasciipartspec(char *tp, struct disklabel64 *lp, int part,
1088                  int lineno, uint32_t blksize)
1089 {
1090         struct partition64 *pp;
1091         char *cp;
1092         const char **cpp;
1093         int r;
1094         u_long v;
1095         uint64_t vv;
1096         uint64_t mpx;
1097
1098         pp = &lp->d_partitions[part];
1099         cp = NULL;
1100
1101         /*
1102          * size
1103          */
1104         r = parse_field_val(&tp, &cp, &vv, lineno);
1105         if (r < 0)
1106                 return (1);
1107
1108         mpx = 1;
1109         switch(r) {
1110         case 0:
1111                 mpx = blksize;
1112                 break;
1113         case '%':
1114                 /* mpx = 1; */
1115                 break;
1116         case '*':
1117                 mpx = 0;
1118                 break;
1119         case 'g':
1120         case 'G':
1121                 mpx *= 1024ULL;
1122                 /* fall through */
1123         case 'm':
1124         case 'M':
1125                 mpx *= 1024ULL;
1126                 /* fall through */
1127         case 'k':
1128         case 'K':
1129                 mpx *= 1024ULL;
1130                 r = 0;                  /* eat the suffix */
1131                 break;
1132         default:
1133                 Warning("unknown size specifier '%c' (*/%%/K/M/G are valid)",
1134                         r);
1135                 return(1);
1136         }
1137
1138         part_size_type[part] = r;
1139         if (vv == 0 && r != '*') {
1140                 fprintf(stderr,
1141                     "line %d: %s: bad partition size (0)\n", lineno, cp);
1142                 return (1);
1143         }
1144         pp->p_bsize = vv * mpx;
1145
1146         /*
1147          * offset
1148          */
1149         r = parse_field_val(&tp, &cp, &vv, lineno);
1150         if (r < 0)
1151                 return (1);
1152         part_offset_type[part] = r;
1153         switch(r) {
1154         case '*':
1155                 pp->p_boffset = 0;
1156                 break;
1157         case 0:
1158                 pp->p_boffset = vv * blksize + lp->d_pbase;
1159                 break;
1160         default:
1161                 fprintf(stderr,
1162                     "line %d: %s: bad suffix on partition offset (%c)\n",
1163                     lineno, cp, r);
1164                 return (1);
1165         }
1166
1167         /*
1168          * fstype
1169          */
1170         cp = tp;
1171         tp = word(cp);
1172         for (cpp = fstypenames; cpp < &fstypenames[FSMAXTYPES]; cpp++)
1173                 if (*cpp && streq(*cpp, cp))
1174                         break;
1175         if (*cpp != NULL) {
1176                 pp->p_fstype = cpp - fstypenames;
1177         } else {
1178                 if (isdigit(*cp))
1179                         v = strtoul(cp, NULL, 0);
1180                 else
1181                         v = FSMAXTYPES;
1182                 if (v >= FSMAXTYPES) {
1183                         fprintf(stderr,
1184                             "line %d: Warning, unknown filesystem type %s\n",
1185                             lineno, cp);
1186                         v = FS_UNUSED;
1187                 }
1188                 pp->p_fstype = v;
1189         }
1190
1191         cp = tp;
1192         if (tp) {
1193                 fprintf(stderr, "line %d: Warning, extra data on line\n",
1194                         lineno);
1195         }
1196         return(0);
1197 }
1198
1199 int
1200 getasciipartuuid(char *tp, struct disklabel64 *lp, int part,
1201                  int lineno, uint32_t blksize __unused)
1202 {
1203         struct partition64 *pp;
1204         uint32_t status;
1205         char *cp;
1206
1207         pp = &lp->d_partitions[part];
1208
1209         cp = tp;
1210         tp = word(cp);
1211         uuid_from_string(cp, &pp->p_stor_uuid, &status);
1212         if (status != uuid_s_ok) {
1213                 fprintf(stderr, "line %d: Illegal storage uuid specification\n",
1214                         lineno);
1215                 return(1);
1216         }
1217         return(0);
1218 }
1219
1220 /*
1221  * Check disklabel for errors and fill in
1222  * derived fields according to supplied values.
1223  */
1224 int
1225 checklabel(struct disklabel64 *lp)
1226 {
1227         struct partition64 *pp;
1228         int errors = 0;
1229         char part;
1230         u_int64_t total_size;
1231         u_int64_t current_offset;
1232         u_long total_percent;
1233         int seen_default_offset;
1234         int hog_part;
1235         int i, j;
1236         struct partition64 *pp2;
1237         u_int64_t off;
1238
1239         if (lp->d_align < 512 ||
1240             (lp->d_align ^ (lp->d_align - 1)) != lp->d_align * 2 - 1) {
1241                 Warning("Illegal alignment specified: %u\n", lp->d_align);
1242                 return (1);
1243         }
1244         if (lp->d_npartitions > MAXPARTITIONS64) {
1245                 Warning("number of partitions (%u) > MAXPARTITIONS (%d)",
1246                         lp->d_npartitions, MAXPARTITIONS64);
1247                 return (1);
1248         }
1249         off = offsetof(struct disklabel64, d_partitions[lp->d_npartitions]);
1250         off = (off + lp->d_align - 1) & ~(int64_t)(lp->d_align - 1);
1251
1252         if (lp->d_bbase < off || lp->d_bbase % lp->d_align) {
1253                 Warning("illegal boot2 data base ");
1254                 return (1);
1255         }
1256         if (lp->d_pbase < lp->d_bbase || lp->d_pbase % lp->d_align) {
1257                 Warning("illegal partition data base");
1258                 return (1);
1259         }
1260         if (lp->d_pstop < lp->d_pbase || lp->d_pstop % lp->d_align) {
1261                 Warning("illegal partition data stop");
1262                 return (1);
1263         }
1264         if (lp->d_pstop > lp->d_total_size) {
1265                 printf("%012llx\n%012llx\n", lp->d_pstop, lp->d_total_size);
1266                 Warning("disklabel control info is beyond the total size");
1267                 return (1);
1268         }
1269         if (lp->d_abase &&
1270             (lp->d_abase < lp->d_pstop || lp->d_pstop % lp->d_align ||
1271              lp->d_abase > lp->d_total_size - off)) {
1272                 Warning("illegal backup label location");
1273                 return (1);
1274         }
1275
1276         /* first allocate space to the partitions, then offsets */
1277         total_size = 0;         /* in bytes */
1278         total_percent = 0;      /* in percent */
1279         hog_part = -1;
1280         /* find all fixed partitions */
1281         for (i = 0; i < (int)lp->d_npartitions; i++) {
1282                 pp = &lp->d_partitions[i];
1283                 if (part_set[i]) {
1284                         if (part_size_type[i] == '*') {
1285                                 if (hog_part != -1)
1286                                         Warning("Too many '*' partitions (%c and %c)",
1287                                             hog_part + 'a',i + 'a');
1288                                 else
1289                                         hog_part = i;
1290                         } else {
1291                                 off_t size;
1292
1293                                 size = pp->p_bsize;
1294                                 if (part_size_type[i] == '%') {
1295                                         /*
1296                                          * don't count %'s yet
1297                                          */
1298                                         total_percent += size;
1299                                 } else {
1300                                         /*
1301                                          * Value has already been converted
1302                                          * to bytes.
1303                                          */
1304                                         if (size % lp->d_align != 0) {
1305                                                 Warning("partition %c's size is not properly aligned",
1306                                                         i + 'a');
1307                                         }
1308                                         total_size += size;
1309                                 }
1310                         }
1311                 }
1312         }
1313         /* handle % partitions - note %'s don't need to add up to 100! */
1314         if (total_percent != 0) {
1315                 int64_t free_space;
1316                 int64_t space_left;
1317
1318                 free_space = (int64_t)(lp->d_pstop - lp->d_pbase - total_size);
1319                 space_left = free_space;
1320                 if (total_percent > 100) {
1321                         fprintf(stderr,"total percentage %lu is greater than 100\n",
1322                             total_percent);
1323                         errors++;
1324                 }
1325
1326                 if (free_space > 0) {
1327                         for (i = 0; i < (int)lp->d_npartitions; i++) {
1328                                 pp = &lp->d_partitions[i];
1329                                 if (part_set[i] && part_size_type[i] == '%') {
1330                                         /* careful of overflows! and integer roundoff */
1331                                         pp->p_bsize = ((double)pp->p_bsize/100) * free_space;
1332                                         pp->p_bsize = (pp->p_bsize + lp->d_align - 1) & ~(u_int64_t)(lp->d_align - 1);
1333                                         if ((int64_t)pp->p_bsize > space_left)
1334                                                 pp->p_bsize = (u_int64_t)space_left;
1335                                         total_size += pp->p_bsize;
1336                                         space_left -= pp->p_bsize;
1337                                 }
1338                         }
1339                 } else {
1340                         fprintf(stderr,
1341                             "%lld bytes available to give to '*' and '%%' partitions\n",
1342                             free_space);
1343                         errors++;
1344                         /* fix?  set all % partitions to size 0? */
1345                 }
1346         }
1347         /* give anything remaining to the hog partition */
1348         if (hog_part != -1) {
1349                 lp->d_partitions[hog_part].p_bsize = lp->d_pstop - lp->d_pbase - total_size;
1350                 total_size = lp->d_pstop - lp->d_pbase;
1351         }
1352
1353         /* Now set the offsets for each partition */
1354         current_offset = lp->d_pbase;
1355         seen_default_offset = 0;
1356         for (i = 0; i < (int)lp->d_npartitions; i++) {
1357                 part = 'a' + i;
1358                 pp = &lp->d_partitions[i];
1359                 if (pp->p_bsize == 0)
1360                         continue;
1361                 if (part_set[i]) {
1362                         if (part_offset_type[i] == '*') {
1363                                 pp->p_boffset = current_offset;
1364                                 seen_default_offset = 1;
1365                         } else {
1366                                 /* allow them to be out of order for old-style tables */
1367                                 if (pp->p_boffset < current_offset &&
1368                                     seen_default_offset &&
1369                                     pp->p_fstype != FS_VINUM) {
1370                                         fprintf(stderr,
1371 "Offset 0x%012llx for partition %c overlaps previous partition which ends at 0x%012llx\n",
1372                                             pp->p_boffset, i + 'a',
1373                                             current_offset);
1374                                         fprintf(stderr,
1375 "Labels with any *'s for offset must be in ascending order by sector\n");
1376                                         errors++;
1377                                 } else if (pp->p_boffset != current_offset &&
1378                                            seen_default_offset) {
1379                                         /*
1380                                          * this may give unneeded warnings if
1381                                          * partitions are out-of-order
1382                                          */
1383                                         Warning(
1384 "Offset 0x%012llx for partition %c doesn't match expected value 0x%012llx",
1385                                             pp->p_boffset, i + 'a',
1386                                             current_offset);
1387                                 }
1388                         }
1389                         current_offset = pp->p_boffset + pp->p_bsize;
1390                 }
1391         }
1392
1393         for (i = 0; i < (int)lp->d_npartitions; i++) {
1394                 part = 'a' + i;
1395                 pp = &lp->d_partitions[i];
1396                 if (pp->p_bsize == 0 && pp->p_boffset != 0)
1397                         Warning("partition %c: size 0, but offset 0x%012llx",
1398                             part, pp->p_boffset);
1399                 if (pp->p_bsize == 0) {
1400                         pp->p_boffset = 0;
1401                         continue;
1402                 }
1403                 if (uuid_is_nil(&pp->p_stor_uuid, NULL))
1404                         uuid_create(&pp->p_stor_uuid, NULL);
1405
1406                 if (pp->p_boffset < lp->d_pbase) {
1407                         fprintf(stderr,
1408                             "partition %c: offset out of bounds (%lld)\n",
1409                             part, pp->p_boffset - lp->d_pbase);
1410                         errors++;
1411                 }
1412                 if (pp->p_boffset > lp->d_pstop) {
1413                         fprintf(stderr,
1414                             "partition %c: offset out of bounds (%lld)\n",
1415                             part, pp->p_boffset - lp->d_pbase);
1416                         errors++;
1417                 }
1418                 if (pp->p_boffset + pp->p_bsize > lp->d_pstop) {
1419                         fprintf(stderr,
1420                             "partition %c: size out of bounds (%lld)\n",
1421                             part, pp->p_boffset - lp->d_pbase);
1422                         errors++;
1423                 }
1424
1425                 /* check for overlaps */
1426                 /* this will check for all possible overlaps once and only once */
1427                 for (j = 0; j < i; j++) {
1428                         pp2 = &lp->d_partitions[j];
1429                         if (pp->p_fstype != FS_VINUM &&
1430                             pp2->p_fstype != FS_VINUM &&
1431                             part_set[i] && part_set[j]) {
1432                                 if (pp2->p_boffset < pp->p_boffset + pp->p_bsize &&
1433                                     (pp2->p_boffset + pp2->p_bsize > pp->p_boffset ||
1434                                         pp2->p_boffset >= pp->p_boffset)) {
1435                                         fprintf(stderr,"partitions %c and %c overlap!\n",
1436                                             j + 'a', i + 'a');
1437                                         errors++;
1438                                 }
1439                         }
1440                 }
1441         }
1442         for (; i < (int)lp->d_npartitions; i++) {
1443                 part = 'a' + i;
1444                 pp = &lp->d_partitions[i];
1445                 if (pp->p_bsize || pp->p_boffset)
1446                         Warning("unused partition %c: size 0x%012llx offset 0x%012llx",
1447                             'a' + i, pp->p_bsize, pp->p_boffset);
1448         }
1449         return (errors);
1450 }
1451
1452 /*
1453  * When operating on a "virgin" disk, try getting an initial label
1454  * from the associated device driver.  This might work for all device
1455  * drivers that are able to fetch some initial device parameters
1456  * without even having access to a (BSD) disklabel, like SCSI disks,
1457  * most IDE drives, or vn devices.
1458  *
1459  * The device name must be given in its "canonical" form.
1460  */
1461 static struct disklabel64 dlab;
1462
1463 struct disklabel64 *
1464 getvirginlabel(void)
1465 {
1466         struct disklabel64 *dl = &dlab;
1467         char *path;
1468         int f;
1469
1470         if (dkname[0] == '/') {
1471                 warnx("\"auto\" requires the usage of a canonical disk name");
1472                 return (NULL);
1473         }
1474         asprintf(&path, "%s%s", _PATH_DEV, dkname);
1475         if ((f = open(path, O_RDONLY)) == -1) {
1476                 warn("cannot open %s", path);
1477                 return (NULL);
1478         }
1479
1480         /*
1481          * Try to use the new get-virgin-label ioctl.  If it fails,
1482          * fallback to the old get-disk-info ioctl.
1483          */
1484         if (ioctl(f, DIOCGDVIRGIN64, dl) < 0) {
1485                 l_perror("ioctl DIOCGDVIRGIN64");
1486                 close(f);
1487                 return (NULL);
1488         }
1489         close(f);
1490         return (dl);
1491 }
1492
1493 /*VARARGS1*/
1494 void
1495 Warning(const char *fmt, ...)
1496 {
1497         va_list ap;
1498
1499         fprintf(stderr, "Warning, ");
1500         va_start(ap, fmt);
1501         vfprintf(stderr, fmt, ap);
1502         fprintf(stderr, "\n");
1503         va_end(ap);
1504 }
1505
1506 void
1507 usage(void)
1508 {
1509         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",
1510                 "usage: disklabel [-r] disk",
1511                 "\t\t(to read label)",
1512                 "       disklabel -w [-r] [-n] disk type [ packid ]",
1513                 "\t\t(to write label with existing boot program)",
1514                 "       disklabel -e [-r] [-n] disk",
1515                 "\t\t(to edit label)",
1516                 "       disklabel -R [-r] [-n] disk protofile",
1517                 "\t\t(to restore label with existing boot program)",
1518                 "       disklabel -B [-n] [ -b boot1 [ -s boot2 ] ] disk [ type ]",
1519                 "\t\t(to install boot program with existing label)",
1520                 "       disklabel -w -B [-n] [ -b boot1 [ -s boot2 ] ] disk type [ packid ]",
1521                 "\t\t(to write label and boot program)",
1522                 "       disklabel -R -B [-n] [ -b boot1 [ -s boot2 ] ] disk protofile [ type ]",
1523                 "\t\t(to restore label and boot program)",
1524                 "       disklabel [-NW] disk",
1525                 "\t\t(to write disable/enable label)");
1526         exit(1);
1527 }