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 /*
  35  * Copyright (c) 1987, 1993
  36  *      The Regents of the University of California.  All rights reserved.
  37  *
  38  * This code is derived from software contributed to Berkeley by
  39  * Symmetric Computer Systems.
  40  *
  41  * Redistribution and use in source and binary forms, with or without
  42  * modification, are permitted provided that the following conditions
  43  * are met:
  44  * 1. Redistributions of source code must retain the above copyright
  45  *    notice, this list of conditions and the following disclaimer.
  46  * 2. Redistributions in binary form must reproduce the above copyright
  47  *    notice, this list of conditions and the following disclaimer in the
  48  *    documentation and/or other materials provided with the distribution.
  49  * 3. Neither the name of the University nor the names of its contributors
  50  *    may be used to endorse or promote products derived from this software
  51  *    without specific prior written permission.
  52  *
  53  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  54  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  55  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  56  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  57  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  58  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  59  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  60  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  61  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  62  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  63  * SUCH DAMAGE.
  64  *
  65  * @(#)disklabel.c      1.2 (Symmetric) 11/28/85
  66  * @(#)disklabel.c      8.2 (Berkeley) 1/7/94
  67  * $FreeBSD: src/sbin/disklabel/disklabel.c,v 1.28.2.15 2003/01/24 16:18:16 des Exp $
  68  */
  69
  70 #include <sys/param.h>
  71 #include <sys/file.h>
  72 #include <sys/stat.h>
  73 #include <sys/wait.h>
  74 #define DKTYPENAMES
  75 #include <sys/disklabel64.h>
  76 #include <sys/diskslice.h>
  77 #include <sys/diskmbr.h>
  78 #include <sys/dtype.h>
  79 #include <sys/sysctl.h>
  80 #include <disktab.h>
  81 #include <fstab.h>
  82
  83 #include <vfs/ufs/dinode.h>
  84 #include <vfs/ufs/fs.h>
  85
  86 #include <unistd.h>
  87 #include <string.h>
  88 #include <stdio.h>
  89 #include <stdlib.h>
  90 #include <signal.h>
  91 #include <stdarg.h>
  92 #include <stddef.h>
  93 #include <ctype.h>
  94 #include <err.h>
  95 #include <errno.h>
  96 #include <uuid.h>
  97 #include "pathnames.h"
  98
  99 extern uint32_t crc32(const void *buf, size_t size);
 100
 101 /*
 102  * Disklabel64: read and write 64 bit disklabels.
 103  * The label is usually placed on one of the first sectors of the disk.
 104  * Many machines also place a bootstrap in the same area,
 105  * in which case the label is embedded in the bootstrap.
 106  * The bootstrap source must leave space at the proper offset
 107  * for the label on such machines.
 108  */
 109
 110 #define LABELSIZE       ((sizeof(struct disklabel64) + 4095) & ~4095)
 111 #define BOOTSIZE        32768
 112
 113 /* FIX!  These are too low, but are traditional */
 114 #define DEFAULT_NEWFS_BLOCK  8192U
 115 #define DEFAULT_NEWFS_FRAG   1024U
 116 #define DEFAULT_NEWFS_CPG    16U
 117
 118 #define BIG_NEWFS_BLOCK  16384U
 119 #define BIG_NEWFS_FRAG   2048U
 120 #define BIG_NEWFS_CPG    64U
 121
 122 void    makelabel(const char *, const char *, struct disklabel64 *);
 123 int     writelabel(int, struct disklabel64 *);
 124 void    l_perror(const char *);
 125 struct disklabel64 *readlabel(int);
 126 struct disklabel64 *makebootarea(int);
 127 void    display(FILE *, const struct disklabel64 *);
 128 int     edit(struct disklabel64 *, int);
 129 int     editit(void);
 130 char    *skip(char *);
 131 char    *word(char *);
 132 int     getasciilabel(FILE *, struct disklabel64 *);
 133 int     getasciipartspec(char *, struct disklabel64 *, int, int, uint32_t);
 134 int     getasciipartuuid(char *, struct disklabel64 *, int, int, uint32_t);
 135 int     checklabel(struct disklabel64 *);
 136 void    Warning(const char *, ...) __printflike(1, 2);
 137 void    usage(void);
 138 struct disklabel64 *getvirginlabel(void);
 139
 140 #define DEFEDITOR       _PATH_VI
 141 #define streq(a,b)      (strcmp(a,b) == 0)
 142
 143 char    *dkname;
 144 char    *specname;
 145 char    tmpfil[] = PATH_TMPFILE;
 146
 147 struct  disklabel64 lab;
 148
 149 #define MAX_PART ('z')
 150 #define MAX_NUM_PARTS (1 + MAX_PART - 'a')
 151 char    part_size_type[MAX_NUM_PARTS];
 152 char    part_offset_type[MAX_NUM_PARTS];
 153 int     part_set[MAX_NUM_PARTS];
 154
 155 int     installboot;    /* non-zero if we should install a boot program */
 156 int     boot1size;
 157 int     boot1lsize;
 158 int     boot2size;
 159 char    *boot1buf;
 160 char    *boot2buf;
 161 char    *boot1path;
 162 char    *boot2path;
 163
 164 enum    {
 165         UNSPEC, EDIT, NOWRITE, READ, RESTORE, WRITE, WRITEABLE, WRITEBOOT
 166 } op = UNSPEC;
 167
 168 int     rflag;
 169 int     Vflag;
 170 int     disable_write;   /* set to disable writing to disk label */
 171 u_int32_t slice_start_lba;
 172
 173 #ifdef DEBUG
 174 int     debug;
 175 #define OPTIONS "BNRWb:denrs:Vw"
 176 #else
 177 #define OPTIONS "BNRWb:enrs:Vw"
 178 #endif
 179
 180 int
 181 main(int argc, char *argv[])
 182 {
 183         struct disklabel64 *lp;
 184         FILE *t;
 185         int ch, f = 0, flag, error = 0;
 186         char *name = NULL;
 187
 188         while ((ch = getopt(argc, argv, OPTIONS)) != -1)
 189                 switch (ch) {
 190                         case 'B':
 191                                 ++installboot;
 192                                 break;
 193                         case 'b':
 194                                 boot1path = optarg;
 195                                 break;
 196
 197                         case 's':
 198                                 boot2path = optarg;
 199                                 break;
 200                         case 'N':
 201                                 if (op != UNSPEC)
 202                                         usage();
 203                                 op = NOWRITE;
 204                                 break;
 205                         case 'n':
 206                                 disable_write = 1;
 207                                 break;
 208                         case 'R':
 209                                 if (op != UNSPEC)
 210                                         usage();
 211                                 op = RESTORE;
 212                                 break;
 213                         case 'W':
 214                                 if (op != UNSPEC)
 215                                         usage();
 216                                 op = WRITEABLE;
 217                                 break;
 218                         case 'e':
 219                                 if (op != UNSPEC)
 220                                         usage();
 221                                 op = EDIT;
 222                                 break;
 223                         case 'V':
 224                                 ++Vflag;
 225                                 break;
 226                         case 'r':
 227                                 ++rflag;
 228                                 break;
 229                         case 'w':
 230                                 if (op != UNSPEC)
 231                                         usage();
 232                                 op = WRITE;
 233                                 break;
 234 #ifdef DEBUG
 235                         case 'd':
 236                                 debug++;
 237                                 break;
 238 #endif
 239                         case '?':
 240                         default:
 241                                 usage();
 242                 }
 243         argc -= optind;
 244         argv += optind;
 245         if (installboot) {
 246                 rflag++;
 247                 if (op == UNSPEC)
 248                         op = WRITEBOOT;
 249         } else {
 250                 if (op == UNSPEC)
 251                         op = READ;
 252                 boot1path = NULL;
 253                 boot2path = NULL;
 254         }
 255         if (argc < 1)
 256                 usage();
 257
 258         dkname = getdevpath(argv[0], 0);
 259         specname = dkname;
 260         f = open(specname, op == READ ? O_RDONLY : O_RDWR);
 261         if (f < 0)
 262                 err(4, "%s", specname);
 263
 264         switch(op) {
 265
 266         case UNSPEC:
 267                 break;
 268
 269         case EDIT:
 270                 if (argc != 1)
 271                         usage();
 272                 lp = readlabel(f);
 273                 error = edit(lp, f);
 274                 break;
 275
 276         case NOWRITE:
 277                 flag = 0;
 278                 if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0)
 279                         err(4, "ioctl DIOCWLABEL");
 280                 break;
 281
 282         case READ:
 283                 if (argc != 1)
 284                         usage();
 285                 lp = readlabel(f);
 286                 display(stdout, lp);
 287                 error = checklabel(lp);
 288                 break;
 289
 290         case RESTORE:
 291                 if (installboot && argc == 3) {
 292                         makelabel(argv[2], 0, &lab);
 293                         argc--;
 294
 295                         /*
 296                          * We only called makelabel() for its side effect
 297                          * of setting the bootstrap file names.  Discard
 298                          * all changes to `lab' so that all values in the
 299                          * final label come from the ASCII label.
 300                          */
 301                         bzero((char *)&lab, sizeof(lab));
 302                 }
 303                 if (argc != 2)
 304                         usage();
 305                 if (!(t = fopen(argv[1], "r")))
 306                         err(4, "%s", argv[1]);
 307                 if (!getasciilabel(t, &lab))
 308                         exit(1);
 309                 lp = makebootarea(f);
 310                 bcopy(&lab.d_magic, &lp->d_magic,
 311                       sizeof(lab) - offsetof(struct disklabel64, d_magic));
 312                 error = writelabel(f, lp);
 313                 break;
 314
 315         case WRITE:
 316                 if (argc == 3) {
 317                         name = argv[2];
 318                         argc--;
 319                 }
 320                 if (argc != 2)
 321                         usage();
 322                 makelabel(argv[1], name, &lab);
 323                 lp = makebootarea(f);
 324                 bcopy(&lab.d_magic, &lp->d_magic,
 325                       sizeof(lab) - offsetof(struct disklabel64, d_magic));
 326                 if (checklabel(lp) == 0)
 327                         error = writelabel(f, lp);
 328                 break;
 329
 330         case WRITEABLE:
 331                 flag = 1;
 332                 if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0)
 333                         err(4, "ioctl DIOCWLABEL");
 334                 break;
 335
 336         case WRITEBOOT:
 337         {
 338                 struct disklabel64 tlab;
 339
 340                 lp = readlabel(f);
 341                 tlab = *lp;
 342                 if (argc == 2)
 343                         makelabel(argv[1], 0, &lab);
 344                 lp = makebootarea(f);
 345                 bcopy(&tlab.d_magic, &lp->d_magic,
 346                       sizeof(tlab) - offsetof(struct disklabel64, d_magic));
 347                 if (checklabel(lp) == 0)
 348                         error = writelabel(f, lp);
 349                 break;
 350         }
 351         }
 352         exit(error);
 353 }
 354
 355 /*
 356  * Construct a prototype disklabel from /etc/disktab.  As a side
 357  * effect, set the names of the primary and secondary boot files
 358  * if specified.
 359  */
 360 void
 361 makelabel(const char *type, const char *name, struct disklabel64 *lp)
 362 {
 363         struct disklabel64 *dp;
 364
 365         if (strcmp(type, "auto") == 0)
 366                 dp = getvirginlabel();
 367         else
 368                 dp = NULL;
 369         if (dp == NULL)
 370                 errx(1, "%s: unknown disk type", type);
 371         *lp = *dp;
 372
 373         /*
 374          * NOTE: boot control files may no longer be specified in disktab.
 375          */
 376         if (name)
 377                 strncpy(lp->d_packname, name, sizeof(lp->d_packname));
 378 }
 379
 380 int
 381 writelabel(int f, struct disklabel64 *lp)
 382 {
 383         struct disklabel64 *blp;
 384         int flag;
 385         int r;
 386         size_t lpsize;
 387         size_t lpcrcsize;
 388
 389         lpsize = offsetof(struct disklabel64, d_partitions[lp->d_npartitions]);
 390         lpcrcsize = lpsize - offsetof(struct disklabel64, d_magic);
 391
 392         if (disable_write) {
 393                 Warning("write to disk label suppressed - label was as follows:");
 394                 display(stdout, lp);
 395                 return (0);
 396         } else {
 397                 lp->d_magic = DISKMAGIC64;
 398                 lp->d_crc = 0;
 399                 lp->d_crc = crc32(&lp->d_magic, lpcrcsize);
 400                 if (rflag) {
 401                         /*
 402                          * Make sure the boot area is not too large
 403                          */
 404                         if (boot2buf) {
 405                                 int lpbsize = (int)(lp->d_pbase - lp->d_bbase);
 406                                 if (lp->d_pbase == 0) {
 407                                         errx(1, "no space was set aside in "
 408                                                 "the disklabel for boot2!");
 409                                 }
 410                                 if (boot2size > lpbsize) {
 411                                         errx(1, "label did not reserve enough "
 412                                                 "space for boot!  %d/%d",
 413                                              boot2size, lpbsize);
 414                                 }
 415                         }
 416
 417                         /*
 418                          * First set the kernel disk label,
 419                          * then write a label to the raw disk.
 420                          * If the SDINFO ioctl fails because it is
 421                          * unimplemented, keep going; otherwise, the kernel
 422                          * consistency checks may prevent us from changing
 423                          * the current (in-core) label.
 424                          */
 425                         if (ioctl(f, DIOCSDINFO64, lp) < 0 &&
 426                                 errno != ENODEV && errno != ENOTTY) {
 427                                 l_perror("ioctl DIOCSDINFO");
 428                                 return (1);
 429                         }
 430                         lseek(f, (off_t)0, SEEK_SET);
 431
 432                         /*
 433                          * The disklabel embeds areas which we may not
 434                          * have wanted to change.  Merge those areas in
 435                          * from disk.
 436                          */
 437                         blp = makebootarea(f);
 438                         if (blp != lp) {
 439                                 bcopy(&lp->d_magic, &blp->d_magic,
 440                                       sizeof(*lp) -
 441                                       offsetof(struct disklabel64, d_magic));
 442                         }
 443
 444                         /*
 445                          * write enable label sector before write
 446                          * (if necessary), disable after writing.
 447                          */
 448                         flag = 1;
 449                         if (ioctl(f, DIOCWLABEL, &flag) < 0)
 450                                 warn("ioctl DIOCWLABEL");
 451
 452                         r = write(f, boot1buf, boot1lsize);
 453                         if (r != (ssize_t)boot1lsize) {
 454                                 warn("write");
 455                                 return (1);
 456                         }
 457                         /*
 458                          * Output the remainder of the disklabel
 459                          */
 460                         if (boot2buf) {
 461                                 lseek(f, lp->d_bbase, 0);
 462                                 r = write(f, boot2buf, boot2size);
 463                                 if (r != boot2size) {
 464                                         warn("write");
 465                                         return(1);
 466                                 }
 467                         }
 468                         flag = 0;
 469                         ioctl(f, DIOCWLABEL, &flag);
 470                 } else if (ioctl(f, DIOCWDINFO64, lp) < 0) {
 471                         l_perror("ioctl DIOCWDINFO64");
 472                         return (1);
 473                 }
 474         }
 475         return (0);
 476 }
 477
 478 void
 479 l_perror(const char *s)
 480 {
 481         switch (errno) {
 482
 483         case ESRCH:
 484                 warnx("%s: no disk label on disk;", s);
 485                 fprintf(stderr, "add \"-r\" to install initial label\n");
 486                 break;
 487
 488         case EINVAL:
 489                 warnx("%s: label magic number or checksum is wrong!", s);
 490                 fprintf(stderr, "(disklabel or kernel is out of date?)\n");
 491                 break;
 492
 493         case EBUSY:
 494                 warnx("%s: open partition would move or shrink", s);
 495                 break;
 496
 497         case ENOATTR:
 498                 warnx("%s: the disk already has a label of a different type,\n"
 499                       "probably a 32 bit disklabel.  It must be cleaned out "
 500                       "first.\n", s);
 501                 break;
 502
 503         default:
 504                 warn(NULL);
 505                 break;
 506         }
 507 }
 508
 509 /*
 510  * Fetch disklabel for disk.
 511  * Use ioctl to get label unless -r flag is given.
 512  */
 513 struct disklabel64 *
 514 readlabel(int f)
 515 {
 516         struct disklabel64 *lp;
 517         u_int32_t savecrc;
 518         size_t lpcrcsize;
 519
 520         if (rflag) {
 521                 /*
 522                  * Allocate space for the label.  The boot1 code, if any,
 523                  * is embedded in the label.  The label overlaps the boot1
 524                  * code.
 525                  */
 526                 lp = makebootarea(f);
 527                 lpcrcsize = offsetof(struct disklabel64,
 528                                      d_partitions[lp->d_npartitions]) -
 529                             offsetof(struct disklabel64, d_magic);
 530                 savecrc = lp->d_crc;
 531                 lp->d_crc = 0;
 532                 if (lp->d_magic != DISKMAGIC64)
 533                         errx(1, "bad pack magic number");
 534                 if (lp->d_npartitions > MAXPARTITIONS64 ||
 535                     savecrc != crc32(&lp->d_magic, lpcrcsize)
 536                 ) {
 537                         errx(1, "corrupted disklabel64");
 538                 }
 539                 lp->d_crc = savecrc;
 540         } else {
 541                 /*
 542                  * Just use a static structure to hold the label.  Note
 543                  * that DIOCSDINFO64 does not overwrite the boot1 area
 544                  * even though it is part of the disklabel64 structure.
 545                  */
 546                 lp = &lab;
 547                 if (Vflag) {
 548                         if (ioctl(f, DIOCGDVIRGIN64, lp) < 0) {
 549                                 l_perror("ioctl DIOCGDVIRGIN64");
 550                                 exit(4);
 551                         }
 552                 } else {
 553                         if (ioctl(f, DIOCGDINFO64, lp) < 0) {
 554                                 l_perror("ioctl DIOCGDINFO64");
 555                                 exit(4);
 556                         }
 557                 }
 558         }
 559         return (lp);
 560 }
 561
 562 /*
 563  * Construct a boot area for boot1 and boot2 and return the location of
 564  * the label within the area.  The caller will overwrite the label so
 565  * we don't actually have to read it.
 566  */
 567 struct disklabel64 *
 568 makebootarea(int f)
 569 {
 570         struct disklabel64 *lp;
 571         struct partinfo info;
 572         u_int32_t secsize;
 573         struct stat st;
 574         int fd;
 575         int r;
 576
 577         if (ioctl(f, DIOCGPART, &info) == 0)
 578                 secsize = info.media_blksize;
 579         else
 580                 secsize = 512;
 581
 582         if (boot1buf == NULL) {
 583                 size_t rsize;
 584
 585                 rsize = roundup2(sizeof(struct disklabel64), secsize);
 586                 boot1size = offsetof(struct disklabel64, d_magic);
 587                 boot1lsize = rsize;
 588                 boot1buf = malloc(rsize);
 589                 bzero(boot1buf, rsize);
 590                 r = read(f, boot1buf, rsize);
 591                 if (r != (int)rsize)
 592                         err(4, "%s", specname);
 593         }
 594         lp = (void *)boot1buf;
 595
 596         if (installboot == 0)
 597                 return(lp);
 598
 599         if (boot2buf == NULL) {
 600                 boot2size = 32768;
 601                 boot2buf = malloc(boot2size);
 602                 bzero(boot2buf, boot2size);
 603         }
 604
 605         /*
 606          * If installing the boot code, read it into the appropriate portions
 607          * of the buffer(s)
 608          */
 609         if (boot1path == NULL)
 610                 asprintf(&boot1path, "%s/boot1_64", _PATH_BOOTDIR);
 611         if (boot2path == NULL)
 612                 asprintf(&boot2path, "%s/boot2_64", _PATH_BOOTDIR);
 613
 614         if ((fd = open(boot1path, O_RDONLY)) < 0)
 615                 err(4, "%s", boot1path);
 616         if (fstat(fd, &st) < 0)
 617                 err(4, "%s", boot1path);
 618         if (st.st_size > boot1size)
 619                 err(4, "%s must be exactly %d bytes!", boot1path, boot1size);
 620         if (read(fd, boot1buf, boot1size) != boot1size)
 621                 err(4, "%s must be exactly %d bytes!", boot1path, boot1size);
 622         close(fd);
 623
 624         if ((fd = open(boot2path, O_RDONLY)) < 0)
 625                 err(4, "%s", boot2path);
 626         if (fstat(fd, &st) < 0)
 627                 err(4, "%s", boot2path);
 628         if (st.st_size > boot2size)
 629                 err(4, "%s must be <= %d bytes!", boot2path, boot2size);
 630         if ((r = read(fd, boot2buf, boot2size)) < 1)
 631                 err(4, "%s is empty!", boot2path);
 632         boot2size = roundup2(r, secsize);
 633         close(fd);
 634
 635         /*
 636          * XXX dangerously dedicated support goes here XXX
 637          */
 638         return (lp);
 639 }
 640
 641 void
 642 display(FILE *f, const struct disklabel64 *lp)
 643 {
 644         const struct partition64 *pp;
 645         char *str;
 646         unsigned int part;
 647         int didany;
 648         uint32_t blksize;
 649
 650         /*
 651          * Use a human readable block size if possible.  This is for
 652          * display and editing purposes only.
 653          */
 654         if (lp->d_align > 1024)
 655                 blksize = 1024;
 656         else
 657                 blksize = lp->d_align;
 658
 659         fprintf(f, "# %s:\n", specname);
 660         fprintf(f, "#\n");
 661         fprintf(f, "# Informational fields calculated from the above\n");
 662         fprintf(f, "# All byte equivalent offsets must be aligned\n");
 663         fprintf(f, "#\n");
 664         fprintf(f, "# boot space: %10ju bytes\n",
 665                 (intmax_t)(lp->d_pbase - lp->d_bbase));
 666         fprintf(f, "# data space: %10ju blocks\t# %6.2f MB (%ju bytes)\n",
 667                         (intmax_t)(lp->d_pstop - lp->d_pbase) / blksize,
 668                         (double)(lp->d_pstop - lp->d_pbase) / 1024.0 / 1024.0,
 669                         (intmax_t)(lp->d_pstop - lp->d_pbase));
 670         fprintf(f, "#\n");
 671         fprintf(f, "# NOTE: If the partition data base looks odd it may be\n");
 672         fprintf(f, "#       physically aligned instead of slice-aligned\n");
 673         fprintf(f, "#\n");
 674
 675         uuid_to_string(&lp->d_stor_uuid, &str, NULL);
 676         fprintf(f, "diskid: %s\n", str ? str : "<unknown>");
 677         free(str);
 678
 679         fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname),
 680                 lp->d_packname);
 681         fprintf(f, "boot2 data base:      0x%012jx\n", (intmax_t)lp->d_bbase);
 682         fprintf(f, "partitions data base: 0x%012jx\n", (intmax_t)lp->d_pbase);
 683         fprintf(f, "partitions data stop: 0x%012jx\n", (intmax_t)lp->d_pstop);
 684         fprintf(f, "backup label:         0x%012jx\n", (intmax_t)lp->d_abase);
 685         fprintf(f, "total size:           0x%012jx\t# %6.2f MB\n",
 686                 (intmax_t)lp->d_total_size,
 687                 (double)lp->d_total_size / 1024.0 / 1024.0);
 688         fprintf(f, "alignment: %u\n", lp->d_align);
 689         fprintf(f, "display block size: %u\t# for partition display only\n",
 690                 blksize);
 691
 692         fprintf(f, "\n");
 693         fprintf(f, "%u partitions:\n", lp->d_npartitions);
 694         fprintf(f, "#          size     offset    fstype   fsuuid\n");
 695         didany = 0;
 696         for (part = 0; part < lp->d_npartitions; part++) {
 697                 pp = &lp->d_partitions[part];
 698                 const u_long onemeg = 1024 * 1024;
 699
 700                 if (pp->p_bsize == 0)
 701                         continue;
 702                 didany = 1;
 703                 fprintf(f, "  %c: ", 'a' + part);
 704
 705                 if (pp->p_bsize % lp->d_align)
 706                     fprintf(f, "%10s  ", "ILLEGAL");
 707                 else
 708                     fprintf(f, "%10ju ", (intmax_t)pp->p_bsize / blksize);
 709
 710                 if ((pp->p_boffset - lp->d_pbase) % lp->d_align)
 711                     fprintf(f, "%10s  ", "ILLEGAL");
 712                 else
 713                     fprintf(f, "%10ju  ",
 714                             (intmax_t)(pp->p_boffset - lp->d_pbase) / blksize);
 715
 716                 if (pp->p_fstype < FSMAXTYPES)
 717                         fprintf(f, "%8.8s", fstypenames[pp->p_fstype]);
 718                 else
 719                         fprintf(f, "%8d", pp->p_fstype);
 720                 fprintf(f, "\t# %11.3fMB", (double)pp->p_bsize / onemeg);
 721                 fprintf(f, "\n");
 722         }
 723         for (part = 0; part < lp->d_npartitions; part++) {
 724                 pp = &lp->d_partitions[part];
 725
 726                 if (pp->p_bsize == 0)
 727                         continue;
 728
 729                 if (uuid_is_nil(&lp->d_stor_uuid, NULL) == 0) {
 730                         fprintf(f, "  %c-stor_uuid: ", 'a' + part);
 731                         str = NULL;
 732                         uuid_to_string(&pp->p_stor_uuid, &str, NULL);
 733                         if (str) {
 734                                 fprintf(f, "%s", str);
 735                                 free(str);
 736                         }
 737                         fprintf(f, "\n");
 738                 }
 739         }
 740         if (didany == 0) {
 741                 fprintf(f, "# EXAMPLE\n");
 742                 fprintf(f, "#a:          4g          0    4.2BSD\n");
 743                 fprintf(f, "#a:          *           *    4.2BSD\n");
 744
 745         }
 746         fflush(f);
 747 }
 748
 749 int
 750 edit(struct disklabel64 *lp, int f)
 751 {
 752         int c, fd;
 753         struct disklabel64 label;
 754         FILE *fp;
 755
 756         if ((fd = mkstemp(tmpfil)) == -1 ||
 757             (fp = fdopen(fd, "w")) == NULL) {
 758                 warnx("can't create %s", tmpfil);
 759                 return (1);
 760         }
 761         display(fp, lp);
 762         fclose(fp);
 763         for (;;) {
 764                 if (!editit())
 765                         break;
 766                 fp = fopen(tmpfil, "r");
 767                 if (fp == NULL) {
 768                         warnx("can't reopen %s for reading", tmpfil);
 769                         break;
 770                 }
 771                 bzero((char *)&label, sizeof(label));
 772                 if (getasciilabel(fp, &label)) {
 773                         *lp = label;
 774                         if (writelabel(f, lp) == 0) {
 775                                 fclose(fp);
 776                                 unlink(tmpfil);
 777                                 return (0);
 778                         }
 779                 }
 780                 fclose(fp);
 781                 printf("re-edit the label? [y]: "); fflush(stdout);
 782                 c = getchar();
 783                 if (c != EOF && c != (int)'\n')
 784                         while (getchar() != (int)'\n')
 785                                 ;
 786                 if  (c == (int)'n')
 787                         break;
 788         }
 789         unlink(tmpfil);
 790         return (1);
 791 }
 792
 793 int
 794 editit(void)
 795 {
 796         int pid, xpid;
 797         int status, omask;
 798         const char *ed;
 799
 800         omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP));
 801         while ((pid = fork()) < 0) {
 802                 if (errno == EPROCLIM) {
 803                         warnx("you have too many processes");
 804                         return(0);
 805                 }
 806                 if (errno != EAGAIN) {
 807                         warn("fork");
 808                         return(0);
 809                 }
 810                 sleep(1);
 811         }
 812         if (pid == 0) {
 813                 sigsetmask(omask);
 814                 setgid(getgid());
 815                 setuid(getuid());
 816                 if ((ed = getenv("EDITOR")) == NULL)
 817                         ed = DEFEDITOR;
 818                 execlp(ed, ed, tmpfil, NULL);
 819                 err(1, "%s", ed);
 820         }
 821         while ((xpid = wait(&status)) >= 0)
 822                 if (xpid == pid)
 823                         break;
 824         sigsetmask(omask);
 825         return(!status);
 826 }
 827
 828 char *
 829 skip(char *cp)
 830 {
 831
 832         while (*cp != '\0' && isspace(*cp))
 833                 cp++;
 834         if (*cp == '\0' || *cp == '#')
 835                 return (NULL);
 836         return (cp);
 837 }
 838
 839 char *
 840 word(char *cp)
 841 {
 842         char c;
 843
 844         while (*cp != '\0' && !isspace(*cp) && *cp != '#')
 845                 cp++;
 846         if ((c = *cp) != '\0') {
 847                 *cp++ = '\0';
 848                 if (c != '#')
 849                         return (skip(cp));
 850         }
 851         return (NULL);
 852 }
 853
 854 /*
 855  * Read an ascii label in from fd f,
 856  * in the same format as that put out by display(),
 857  * and fill in lp.
 858  */
 859 int
 860 getasciilabel(FILE *f, struct disklabel64 *lp)
 861 {
 862         char *cp;
 863         u_int part;
 864         char *tp, line[BUFSIZ];
 865         u_long v;
 866         uint32_t blksize = 0;
 867         uint64_t vv;
 868         int lineno = 0, errors = 0;
 869         char empty[] = "";
 870
 871         bzero(&part_set, sizeof(part_set));
 872         bzero(&part_size_type, sizeof(part_size_type));
 873         bzero(&part_offset_type, sizeof(part_offset_type));
 874         while (fgets(line, sizeof(line) - 1, f)) {
 875                 lineno++;
 876                 if ((cp = strchr(line,'\n')) != NULL)
 877                         *cp = '\0';
 878                 cp = skip(line);
 879                 if (cp == NULL)
 880                         continue;
 881                 tp = strchr(cp, ':');
 882                 if (tp == NULL) {
 883                         fprintf(stderr, "line %d: syntax error\n", lineno);
 884                         errors++;
 885                         continue;
 886                 }
 887                 *tp++ = '\0', tp = skip(tp);
 888                 if (sscanf(cp, "%lu partitions", &v) == 1) {
 889                         if (v == 0 || v > MAXPARTITIONS64) {
 890                                 fprintf(stderr,
 891                                     "line %d: bad # of partitions\n", lineno);
 892                                 lp->d_npartitions = MAXPARTITIONS64;
 893                                 errors++;
 894                         } else
 895                                 lp->d_npartitions = v;
 896                         continue;
 897                 }
 898                 if (tp == NULL)
 899                         tp = empty;
 900
 901                 if (streq(cp, "diskid")) {
 902                         uint32_t status = 0;
 903                         uuid_from_string(tp, &lp->d_stor_uuid, &status);
 904                         if (status != uuid_s_ok) {
 905                                 fprintf(stderr,
 906                                     "line %d: %s: illegal UUID\n",
 907                                     lineno, tp);
 908                                 errors++;
 909                         }
 910                         continue;
 911                 }
 912                 if (streq(cp, "label")) {
 913                         strncpy(lp->d_packname, tp, sizeof (lp->d_packname));
 914                         continue;
 915                 }
 916
 917                 if (streq(cp, "alignment")) {
 918                         v = strtoul(tp, NULL, 0);
 919                         if (v <= 0 || (v & DEV_BMASK) != 0 || v > 1024*1024) {
 920                                 fprintf(stderr,
 921                                     "line %d: %s: bad alignment\n",
 922                                     lineno, tp);
 923                                 errors++;
 924                         } else {
 925                                 lp->d_align = v;
 926                         }
 927                         continue;
 928                 }
 929                 if (streq(cp, "total size")) {
 930                         vv = strtoull(tp, NULL, 0);
 931                         if (vv == 0 || vv == (uint64_t)-1) {
 932                                 fprintf(stderr, "line %d: %s: bad %s\n",
 933                                     lineno, tp, cp);
 934                                 errors++;
 935                         } else {
 936                                 lp->d_total_size = vv;
 937                         }
 938                         continue;
 939                 }
 940                 if (streq(cp, "boot2 data base")) {
 941                         vv = strtoull(tp, NULL, 0);
 942                         if (vv == 0 || vv == (uint64_t)-1) {
 943                                 fprintf(stderr, "line %d: %s: bad %s\n",
 944                                     lineno, tp, cp);
 945                                 errors++;
 946                         } else {
 947                                 lp->d_bbase = vv;
 948                         }
 949                         continue;
 950                 }
 951                 if (streq(cp, "partitions data base")) {
 952                         vv = strtoull(tp, NULL, 0);
 953                         if (vv == 0 || vv == (uint64_t)-1) {
 954                                 fprintf(stderr, "line %d: %s: bad %s\n",
 955                                     lineno, tp, cp);
 956                                 errors++;
 957                         } else {
 958                                 lp->d_pbase = vv;
 959                         }
 960                         continue;
 961                 }
 962                 if (streq(cp, "partitions data stop")) {
 963                         vv = strtoull(tp, NULL, 0);
 964                         if (vv == 0 || vv == (uint64_t)-1) {
 965                                 fprintf(stderr, "line %d: %s: bad %s\n",
 966                                     lineno, tp, cp);
 967                                 errors++;
 968                         } else {
 969                                 lp->d_pstop = vv;
 970                         }
 971                         continue;
 972                 }
 973                 if (streq(cp, "backup label")) {
 974                         vv = strtoull(tp, NULL, 0);
 975                         if (vv == 0 || vv == (uint64_t)-1) {
 976                                 fprintf(stderr, "line %d: %s: bad %s\n",
 977                                     lineno, tp, cp);
 978                                 errors++;
 979                         } else {
 980                                 lp->d_abase = vv;
 981                         }
 982                         continue;
 983                 }
 984                 if (streq(cp, "display block size")) {
 985                         v = strtoul(tp, NULL, 0);
 986                         if (v <= 0 || (v & DEV_BMASK) != 0 || v > 1024*1024) {
 987                                 fprintf(stderr,
 988                                     "line %d: %s: bad alignment\n",
 989                                     lineno, tp);
 990                                 errors++;
 991                         } else {
 992                                 blksize = v;
 993                         }
 994                         continue;
 995                 }
 996
 997                 /* the ':' was removed above */
 998
 999                 /*
1000                  * Handle main partition data, e.g. a:, b:, etc.
1001                  */
1002                 if (*cp < 'a' || *cp > MAX_PART) {
1003                         fprintf(stderr,
1004                             "line %d: %s: Unknown disklabel field\n", lineno,
1005                             cp);
1006                         errors++;
1007                         continue;
1008                 }
1009
1010                 /* Process a partition specification line. */
1011                 part = *cp - 'a';
1012                 if (part >= lp->d_npartitions) {
1013                         fprintf(stderr,
1014                             "line %d: partition name out of range a-%c: %s\n",
1015                             lineno, 'a' + lp->d_npartitions - 1, cp);
1016                         errors++;
1017                         continue;
1018                 }
1019
1020                 if (blksize == 0) {
1021                         fprintf(stderr, "block size to use for partition "
1022                                         "display was not specified!\n");
1023                         errors++;
1024                         continue;
1025                 }
1026
1027                 if (strcmp(cp + 1, "-stor_uuid") == 0) {
1028                         if (getasciipartuuid(tp, lp, part, lineno, blksize)) {
1029                                 errors++;
1030                                 break;
1031                         }
1032                         continue;
1033                 } else if (cp[1] == 0) {
1034                         part_set[part] = 1;
1035                         if (getasciipartspec(tp, lp, part, lineno, blksize)) {
1036                                 errors++;
1037                                 break;
1038                         }
1039                         continue;
1040                 }
1041                 fprintf(stderr, "line %d: %s: Unknown disklabel field\n",
1042                         lineno, cp);
1043                 errors++;
1044                 continue;
1045         }
1046         errors += checklabel(lp);
1047         return (errors == 0);
1048 }
1049
1050 static
1051 int
1052 parse_field_val(char **tp, char **cp, u_int64_t *vv, int lineno)
1053 {
1054         char *tmp;
1055
1056         if (*tp == NULL || **tp == 0) {
1057                 fprintf(stderr, "line %d: too few numeric fields\n", lineno);
1058                 return(-1);
1059         }
1060         *cp = *tp;
1061         *tp = word(*cp);
1062         *vv = strtoull(*cp, &tmp, 0);
1063         if (*vv == ULLONG_MAX) {
1064                 fprintf(stderr, "line %d: illegal number\n", lineno);
1065                 return(-1);
1066         }
1067         if (tmp)
1068                 return(*tmp);
1069         else
1070                 return(0);
1071 }
1072
1073 /*
1074  * Read a partition line into partition `part' in the specified disklabel.
1075  * Return 0 on success, 1 on failure.
1076  */
1077 int
1078 getasciipartspec(char *tp, struct disklabel64 *lp, int part,
1079                  int lineno, uint32_t blksize)
1080 {
1081         struct partition64 *pp;
1082         char *cp;
1083         const char **cpp;
1084         int r;
1085         u_long v;
1086         uint64_t vv;
1087         uint64_t mpx;
1088
1089         pp = &lp->d_partitions[part];
1090         cp = NULL;
1091
1092         /*
1093          * size
1094          */
1095         r = parse_field_val(&tp, &cp, &vv, lineno);
1096         if (r < 0)
1097                 return (1);
1098
1099         mpx = 1;
1100         switch(r) {
1101         case 0:
1102                 mpx = blksize;
1103                 break;
1104         case '%':
1105                 /* mpx = 1; */
1106                 break;
1107         case '*':
1108                 mpx = 0;
1109                 break;
1110         case 't':
1111         case 'T':
1112                 mpx *= 1024ULL;
1113                 /* fall through */
1114         case 'g':
1115         case 'G':
1116                 mpx *= 1024ULL;
1117                 /* fall through */
1118         case 'm':
1119         case 'M':
1120                 mpx *= 1024ULL;
1121                 /* fall through */
1122         case 'k':
1123         case 'K':
1124                 mpx *= 1024ULL;
1125                 r = 0;                  /* eat the suffix */
1126                 break;
1127         default:
1128                 Warning("unknown size specifier '%c' (*/%%/K/M/G/T are valid)",
1129                         r);
1130                 return(1);
1131         }
1132
1133         part_size_type[part] = r;
1134         if (vv == 0 && r != '*') {
1135                 fprintf(stderr,
1136                     "line %d: %s: bad partition size (0)\n", lineno, cp);
1137                 return (1);
1138         }
1139         pp->p_bsize = vv * mpx;
1140
1141         /*
1142          * offset
1143          */
1144         r = parse_field_val(&tp, &cp, &vv, lineno);
1145         if (r < 0)
1146                 return (1);
1147         part_offset_type[part] = r;
1148         switch(r) {
1149         case '*':
1150                 pp->p_boffset = 0;
1151                 break;
1152         case 0:
1153                 pp->p_boffset = vv * blksize + lp->d_pbase;
1154                 break;
1155         default:
1156                 fprintf(stderr,
1157                     "line %d: %s: bad suffix on partition offset (%c)\n",
1158                     lineno, cp, r);
1159                 return (1);
1160         }
1161
1162         /*
1163          * fstype
1164          */
1165         if (tp == NULL) {
1166                 fprintf(stderr,
1167                     "line %d: no filesystem type was specified\n", lineno);
1168                 return(1);
1169         }
1170         cp = tp;
1171         tp = word(cp);
1172         for (cpp = fstypenames; cpp < &fstypenames[FSMAXTYPES]; cpp++) {
1173                 if (*cpp && strcasecmp(*cpp, cp) == 0)
1174                         break;
1175         }
1176         if (*cpp != NULL) {
1177                 pp->p_fstype = cpp - fstypenames;
1178         } else {
1179                 if (isdigit(*cp))
1180                         v = strtoul(cp, NULL, 0);
1181                 else
1182                         v = FSMAXTYPES;
1183                 if (v >= FSMAXTYPES) {
1184                         fprintf(stderr,
1185                             "line %d: Warning, unknown filesystem type %s\n",
1186                             lineno, cp);
1187                         v = FS_UNUSED;
1188                 }
1189                 pp->p_fstype = v;
1190         }
1191
1192         cp = tp;
1193         if (tp) {
1194                 fprintf(stderr, "line %d: Warning, extra data on line\n",
1195                         lineno);
1196         }
1197         return(0);
1198 }
1199
1200 int
1201 getasciipartuuid(char *tp, struct disklabel64 *lp, int part,
1202                  int lineno, uint32_t blksize __unused)
1203 {
1204         struct partition64 *pp;
1205         uint32_t status;
1206         char *cp;
1207
1208         pp = &lp->d_partitions[part];
1209
1210         cp = tp;
1211         tp = word(cp);
1212         uuid_from_string(cp, &pp->p_stor_uuid, &status);
1213         if (status != uuid_s_ok) {
1214                 fprintf(stderr, "line %d: Illegal storage uuid specification\n",
1215                         lineno);
1216                 return(1);
1217         }
1218         return(0);
1219 }
1220
1221 /*
1222  * Check disklabel for errors and fill in
1223  * derived fields according to supplied values.
1224  */
1225 int
1226 checklabel(struct disklabel64 *lp)
1227 {
1228         struct partition64 *pp;
1229         int errors = 0;
1230         char part;
1231         u_int64_t total_size;
1232         u_int64_t current_offset;
1233         u_long total_percent;
1234         int seen_default_offset;
1235         int hog_part;
1236         int i, j;
1237         struct partition64 *pp2;
1238         u_int64_t off;
1239
1240         if (lp->d_align < 512 ||
1241             (lp->d_align ^ (lp->d_align - 1)) != lp->d_align * 2 - 1) {
1242                 Warning("Illegal alignment specified: %u\n", lp->d_align);
1243                 return (1);
1244         }
1245         if (lp->d_npartitions > MAXPARTITIONS64) {
1246                 Warning("number of partitions (%u) > MAXPARTITIONS (%d)",
1247                         lp->d_npartitions, MAXPARTITIONS64);
1248                 return (1);
1249         }
1250         off = offsetof(struct disklabel64, d_partitions[lp->d_npartitions]);
1251         off = (off + lp->d_align - 1) & ~(int64_t)(lp->d_align - 1);
1252
1253         if (lp->d_bbase < off || lp->d_bbase % lp->d_align) {
1254                 Warning("illegal boot2 data base ");
1255                 return (1);
1256         }
1257
1258         /*
1259          * pbase can be unaligned slice-relative but will be
1260          * aligned physically.
1261          */
1262         if (lp->d_pbase < lp->d_bbase) {
1263                 Warning("illegal partition data base");
1264                 return (1);
1265         }
1266         if (lp->d_pstop < lp->d_pbase) {
1267                 Warning("illegal partition data stop");
1268                 return (1);
1269         }
1270         if (lp->d_pstop > lp->d_total_size) {
1271                 printf("%012jx\n%012jx\n",
1272                         (intmax_t)lp->d_pstop, (intmax_t)lp->d_total_size);
1273                 Warning("disklabel control info is beyond the total size");
1274                 return (1);
1275         }
1276         if (lp->d_abase &&
1277             (lp->d_abase < lp->d_pstop ||
1278              lp->d_abase > lp->d_total_size - off)) {
1279                 Warning("illegal backup label location");
1280                 return (1);
1281         }
1282
1283         /* first allocate space to the partitions, then offsets */
1284         total_size = 0;         /* in bytes */
1285         total_percent = 0;      /* in percent */
1286         hog_part = -1;
1287         /* find all fixed partitions */
1288         for (i = 0; i < (int)lp->d_npartitions; i++) {
1289                 pp = &lp->d_partitions[i];
1290                 if (part_set[i]) {
1291                         if (part_size_type[i] == '*') {
1292                                 if (part_offset_type[i] != '*') {
1293                                         if (total_size < pp->p_boffset)
1294                                                 total_size = pp->p_boffset;
1295                                 }
1296                                 if (hog_part != -1) {
1297                                         Warning("Too many '*' partitions (%c and %c)",
1298                                             hog_part + 'a',i + 'a');
1299                                 } else {
1300                                         hog_part = i;
1301                                 }
1302                         } else {
1303                                 off_t size;
1304
1305                                 size = pp->p_bsize;
1306                                 if (part_size_type[i] == '%') {
1307                                         /*
1308                                          * don't count %'s yet
1309                                          */
1310                                         total_percent += size;
1311                                 } else {
1312                                         /*
1313                                          * Value has already been converted
1314                                          * to bytes.
1315                                          */
1316                                         if (size % lp->d_align != 0) {
1317                                                 Warning("partition %c's size is not properly aligned",
1318                                                         i + 'a');
1319                                         }
1320                                         total_size += size;
1321                                 }
1322                         }
1323                 }
1324         }
1325         /* handle % partitions - note %'s don't need to add up to 100! */
1326         if (total_percent != 0) {
1327                 int64_t free_space;
1328                 int64_t space_left;
1329
1330                 free_space = (int64_t)(lp->d_pstop - lp->d_pbase - total_size);
1331                 free_space &= ~(u_int64_t)(lp->d_align - 1);
1332
1333                 space_left = free_space;
1334                 if (total_percent > 100) {
1335                         fprintf(stderr,"total percentage %lu is greater than 100\n",
1336                             total_percent);
1337                         errors++;
1338                 }
1339
1340                 if (free_space > 0) {
1341                         for (i = 0; i < (int)lp->d_npartitions; i++) {
1342                                 pp = &lp->d_partitions[i];
1343                                 if (part_set[i] && part_size_type[i] == '%') {
1344                                         /* careful of overflows! and integer roundoff */
1345                                         pp->p_bsize = ((double)pp->p_bsize/100) * free_space;
1346                                         pp->p_bsize = (pp->p_bsize + lp->d_align - 1) & ~(u_int64_t)(lp->d_align - 1);
1347                                         if ((int64_t)pp->p_bsize > space_left)
1348                                                 pp->p_bsize = (u_int64_t)space_left;
1349                                         total_size += pp->p_bsize;
1350                                         space_left -= pp->p_bsize;
1351                                 }
1352                         }
1353                 } else {
1354                         fprintf(stderr, "%jd bytes available to give to "
1355                                         "'*' and '%%' partitions\n",
1356                                 (intmax_t)free_space);
1357                         errors++;
1358                         /* fix?  set all % partitions to size 0? */
1359                 }
1360         }
1361         /* give anything remaining to the hog partition */
1362         if (hog_part != -1) {
1363                 off = lp->d_pstop - lp->d_pbase - total_size;
1364                 off &= ~(u_int64_t)(lp->d_align - 1);
1365                 lp->d_partitions[hog_part].p_bsize = off;
1366                 total_size = lp->d_pstop - lp->d_pbase;
1367         }
1368
1369         /* Now set the offsets for each partition */
1370         current_offset = lp->d_pbase;
1371         seen_default_offset = 0;
1372         for (i = 0; i < (int)lp->d_npartitions; i++) {
1373                 part = 'a' + i;
1374                 pp = &lp->d_partitions[i];
1375                 if (pp->p_bsize == 0)
1376                         continue;
1377                 if (part_set[i]) {
1378                         if (part_offset_type[i] == '*') {
1379                                 pp->p_boffset = current_offset;
1380                                 seen_default_offset = 1;
1381                         } else {
1382                                 /* allow them to be out of order for old-style tables */
1383                                 if (pp->p_boffset < current_offset &&
1384                                     seen_default_offset &&
1385                                     pp->p_fstype != FS_VINUM) {
1386                                         fprintf(stderr,
1387 "Offset 0x%012jx for partition %c overlaps previous partition which ends at 0x%012jx\n",
1388                                             (intmax_t)pp->p_boffset,
1389                                             i + 'a',
1390                                             (intmax_t)current_offset);
1391                                         fprintf(stderr,
1392 "Labels with any *'s for offset must be in ascending order by sector\n");
1393                                         errors++;
1394                                 } else if (pp->p_boffset != current_offset &&
1395                                            seen_default_offset) {
1396                                         /*
1397                                          * this may give unneeded warnings if
1398                                          * partitions are out-of-order
1399                                          */
1400                                         Warning(
1401 "Offset 0x%012jx for partition %c doesn't match expected value 0x%012jx",
1402                                             pp->p_boffset, i + 'a',
1403                                             (intmax_t)current_offset);
1404                                 }
1405                         }
1406                         current_offset = pp->p_boffset + pp->p_bsize;
1407                 }
1408         }
1409
1410         for (i = 0; i < (int)lp->d_npartitions; i++) {
1411                 part = 'a' + i;
1412                 pp = &lp->d_partitions[i];
1413                 if (pp->p_bsize == 0 && pp->p_boffset != 0)
1414                         Warning("partition %c: size 0, but offset 0x%012jx",
1415                                 part, (intmax_t)pp->p_boffset);
1416                 if (pp->p_bsize == 0) {
1417                         pp->p_boffset = 0;
1418                         continue;
1419                 }
1420                 if (uuid_is_nil(&pp->p_stor_uuid, NULL))
1421                         uuid_create(&pp->p_stor_uuid, NULL);
1422
1423                 if (pp->p_boffset < lp->d_pbase) {
1424                         fprintf(stderr,
1425                             "partition %c: offset out of bounds (%jd)\n",
1426                             part, (intmax_t)(pp->p_boffset - lp->d_pbase));
1427                         errors++;
1428                 }
1429                 if (pp->p_boffset > lp->d_pstop) {
1430                         fprintf(stderr,
1431                             "partition %c: offset out of bounds (%jd)\n",
1432                             part, (intmax_t)(pp->p_boffset - lp->d_pbase));
1433                         errors++;
1434                 }
1435                 if (pp->p_boffset + pp->p_bsize > lp->d_pstop) {
1436                         fprintf(stderr,
1437                             "partition %c: size out of bounds (%jd)\n",
1438                             part, (intmax_t)(pp->p_boffset - lp->d_pbase));
1439                         errors++;
1440                 }
1441
1442                 /* check for overlaps */
1443                 /* this will check for all possible overlaps once and only once */
1444                 for (j = 0; j < i; j++) {
1445                         pp2 = &lp->d_partitions[j];
1446                         if (pp->p_fstype != FS_VINUM &&
1447                             pp2->p_fstype != FS_VINUM &&
1448                             part_set[i] && part_set[j]) {
1449                                 if (pp2->p_boffset < pp->p_boffset + pp->p_bsize &&
1450                                     (pp2->p_boffset + pp2->p_bsize > pp->p_boffset ||
1451                                         pp2->p_boffset >= pp->p_boffset)) {
1452                                         fprintf(stderr,"partitions %c and %c overlap!\n",
1453                                             j + 'a', i + 'a');
1454                                         errors++;
1455                                 }
1456                         }
1457                 }
1458         }
1459         for (; i < (int)lp->d_npartitions; i++) {
1460                 part = 'a' + i;
1461                 pp = &lp->d_partitions[i];
1462                 if (pp->p_bsize || pp->p_boffset)
1463                         Warning("unused partition %c: size 0x%012jx "
1464                                 "offset 0x%012jx",
1465                                 'a' + i, (intmax_t)pp->p_bsize,
1466                                 (intmax_t)pp->p_boffset);
1467         }
1468         return (errors);
1469 }
1470
1471 /*
1472  * When operating on a "virgin" disk, try getting an initial label
1473  * from the associated device driver.  This might work for all device
1474  * drivers that are able to fetch some initial device parameters
1475  * without even having access to a (BSD) disklabel, like SCSI disks,
1476  * most IDE drives, or vn devices.
1477  *
1478  * The device name must be given in its "canonical" form.
1479  */
1480 static struct disklabel64 dlab;
1481
1482 struct disklabel64 *
1483 getvirginlabel(void)
1484 {
1485         struct disklabel64 *dl = &dlab;
1486         int f;
1487
1488         if ((f = open(dkname, O_RDONLY)) == -1) {
1489                 warn("cannot open %s", dkname);
1490                 return (NULL);
1491         }
1492
1493         /*
1494          * Try to use the new get-virgin-label ioctl.  If it fails,
1495          * fallback to the old get-disk-info ioctl.
1496          */
1497         if (ioctl(f, DIOCGDVIRGIN64, dl) < 0) {
1498                 l_perror("ioctl DIOCGDVIRGIN64");
1499                 close(f);
1500                 return (NULL);
1501         }
1502         close(f);
1503         return (dl);
1504 }
1505
1506 /*VARARGS1*/
1507 void
1508 Warning(const char *fmt, ...)
1509 {
1510         va_list ap;
1511
1512         fprintf(stderr, "Warning, ");
1513         va_start(ap, fmt);
1514         vfprintf(stderr, fmt, ap);
1515         fprintf(stderr, "\n");
1516         va_end(ap);
1517 }
1518
1519 void
1520 usage(void)
1521 {
1522         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",
1523                 "usage: disklabel64 [-r] disk",
1524                 "\t\t(to read label)",
1525                 "       disklabel64 -w [-r] [-n] disk type [packid]",
1526                 "\t\t(to write label with existing boot program)",
1527                 "       disklabel64 -e [-r] [-n] disk",
1528                 "\t\t(to edit label)",
1529                 "       disklabel64 -R [-r] [-n] disk protofile",
1530                 "\t\t(to restore label with existing boot program)",
1531                 "       disklabel64 -B [-n] [-b boot1 -s boot2] disk [type]",
1532                 "\t\t(to install boot program with existing label)",
1533                 "       disklabel64 -w -B [-n] [-b boot1 -s boot2] disk type [packid]",
1534                 "\t\t(to write label and boot program)",
1535                 "       disklabel64 -R -B [-n] [-b boot1 -s boot2] disk protofile [type]",
1536                 "\t\t(to restore label and boot program)",
1537                 "       disklabel64 [-NW] disk",
1538                 "\t\t(to write disable/enable label)");
1539         exit(1);
1540 }