sbin/bsdlabel/bsdlabel.c

   1 /*
   2  * Copyright (c) 1987, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Symmetric Computer Systems.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  */
  36
  37 #ifndef lint
  38 static const char copyright[] =
  39 "@(#) Copyright (c) 1987, 1993\n\
  40         The Regents of the University of California.  All rights reserved.\n";
  41 #endif /* not lint */
  42
  43 #ifndef lint
  44 #if 0
  45 static char sccsid[] = "@(#)disklabel.c 8.2 (Berkeley) 1/7/94";
  46 /* from static char sccsid[] = "@(#)disklabel.c 1.2 (Symmetric) 11/28/85"; */
  47 #endif
  48 static const char rcsid[] =
  49   "$FreeBSD$";
  50 #endif /* not lint */
  51
  52 #include <sys/param.h>
  53 #include <sys/file.h>
  54 #include <sys/stat.h>
  55 #include <sys/wait.h>
  56 #define DKTYPENAMES
  57 #include <sys/disklabel.h>
  58 #include <ufs/ffs/fs.h>
  59 #include <unistd.h>
  60 #include <string.h>
  61 #include <stdio.h>
  62 #include <stdlib.h>
  63 #include <signal.h>
  64 #include <stdarg.h>
  65 #include <ctype.h>
  66 #include <err.h>
  67 #include <errno.h>
  68 #include "pathnames.h"
  69
  70 /*
  71  * Disklabel: read and write disklabels.
  72  * The label is usually placed on one of the first sectors of the disk.
  73  * Many machines also place a bootstrap in the same area,
  74  * in which case the label is embedded in the bootstrap.
  75  * The bootstrap source must leave space at the proper offset
  76  * for the label on such machines.
  77  */
  78
  79 #ifndef BBSIZE
  80 #define BBSIZE  8192                    /* size of boot area, with label */
  81 #endif
  82
  83 /* FIX!  These are too low, but are traditional */
  84 #define DEFAULT_NEWFS_BLOCK  8192U
  85 #define DEFAULT_NEWFS_FRAG   1024U
  86 #define DEFAULT_NEWFS_CPG    16U
  87
  88 #define BIG_NEWFS_BLOCK  16384U
  89 #define BIG_NEWFS_FRAG   4096U
  90 #define BIG_NEWFS_CPG    64U
  91
  92 #ifdef tahoe
  93 #define NUMBOOT 0
  94 #else
  95 #if defined(__alpha__) || defined(hp300) || defined(hp800)
  96 #define NUMBOOT 1
  97 #else
  98 #define NUMBOOT 2
  99 #endif
 100 #endif
 101
 102 void    makelabel       __P((char *, char *, struct disklabel *));
 103 int     writelabel      __P((int, char *, struct disklabel *));
 104 void    l_perror        __P((char *));
 105 struct disklabel * readlabel __P((int));
 106 struct disklabel * makebootarea __P((char *, struct disklabel *, int));
 107 void    display         __P((FILE *, struct disklabel *));
 108 int     edit            __P((struct disklabel *, int));
 109 int     editit          __P((void));
 110 char *  skip            __P((char *));
 111 char *  word            __P((char *));
 112 int     getasciilabel   __P((FILE *, struct disklabel *));
 113 int     checklabel      __P((struct disklabel *));
 114 void    setbootflag     __P((struct disklabel *));
 115 void    Warning         (char *, ...) __printflike(1, 2);
 116 void    usage           __P((void));
 117 struct disklabel * getvirginlabel __P((void));
 118
 119 #define DEFEDITOR       _PATH_VI
 120 #define streq(a,b)      (strcmp(a,b) == 0)
 121
 122 char    *dkname;
 123 char    *specname;
 124 char    tmpfil[] = PATH_TMPFILE;
 125
 126 char    namebuf[BBSIZE], *np = namebuf;
 127 struct  disklabel lab;
 128 char    bootarea[BBSIZE];
 129
 130 /* partition 'c' is the full disk and is special */
 131 #define FULL_DISK_PART 2
 132 #define MAX_PART ('z')
 133 #define MAX_NUM_PARTS (1 + MAX_PART - 'a')
 134 char    part_size_type[MAX_NUM_PARTS];
 135 char    part_offset_type[MAX_NUM_PARTS];
 136 int     part_set[MAX_NUM_PARTS];
 137
 138 #if NUMBOOT > 0
 139 int     installboot;    /* non-zero if we should install a boot program */
 140 char    *bootbuf;       /* pointer to buffer with remainder of boot prog */
 141 int     bootsize;       /* size of remaining boot program */
 142 char    *xxboot;        /* primary boot */
 143 char    *bootxx;        /* secondary boot */
 144 char    boot0[MAXPATHLEN];
 145 char    boot1[MAXPATHLEN];
 146 #endif
 147
 148 enum    {
 149         UNSPEC, EDIT, NOWRITE, READ, RESTORE, WRITE, WRITEABLE, WRITEBOOT
 150 } op = UNSPEC;
 151
 152 int     rflag;
 153 int     disable_write;   /* set to disable writing to disk label */
 154
 155 #ifdef DEBUG
 156 int     debug;
 157 #define OPTIONS "BNRWb:denrs:w"
 158 #else
 159 #define OPTIONS "BNRWb:enrs:w"
 160 #endif
 161
 162 int
 163 main(argc, argv)
 164         int argc;
 165         char *argv[];
 166 {
 167         register struct disklabel *lp;
 168         FILE *t;
 169         int ch, f = 0, flag, error = 0;
 170         char *name = 0;
 171
 172         while ((ch = getopt(argc, argv, OPTIONS)) != -1)
 173                 switch (ch) {
 174 #if NUMBOOT > 0
 175                         case 'B':
 176                                 ++installboot;
 177                                 break;
 178                         case 'b':
 179                                 xxboot = optarg;
 180                                 break;
 181 #if NUMBOOT > 1
 182                         case 's':
 183                                 bootxx = optarg;
 184                                 break;
 185 #endif
 186 #endif
 187                         case 'N':
 188                                 if (op != UNSPEC)
 189                                         usage();
 190                                 op = NOWRITE;
 191                                 break;
 192                         case 'n':
 193                                 disable_write = 1;
 194                                 break;
 195                         case 'R':
 196                                 if (op != UNSPEC)
 197                                         usage();
 198                                 op = RESTORE;
 199                                 break;
 200                         case 'W':
 201                                 if (op != UNSPEC)
 202                                         usage();
 203                                 op = WRITEABLE;
 204                                 break;
 205                         case 'e':
 206                                 if (op != UNSPEC)
 207                                         usage();
 208                                 op = EDIT;
 209                                 break;
 210                         case 'r':
 211                                 ++rflag;
 212                                 break;
 213                         case 'w':
 214                                 if (op != UNSPEC)
 215                                         usage();
 216                                 op = WRITE;
 217                                 break;
 218 #ifdef DEBUG
 219                         case 'd':
 220                                 debug++;
 221                                 break;
 222 #endif
 223                         case '?':
 224                         default:
 225                                 usage();
 226                 }
 227         argc -= optind;
 228         argv += optind;
 229 #if NUMBOOT > 0
 230         if (installboot) {
 231                 rflag++;
 232                 if (op == UNSPEC)
 233                         op = WRITEBOOT;
 234         } else {
 235                 if (op == UNSPEC)
 236                         op = READ;
 237                 xxboot = bootxx = 0;
 238         }
 239 #else
 240         if (op == UNSPEC)
 241                 op = READ;
 242 #endif
 243         if (argc < 1)
 244                 usage();
 245
 246         dkname = argv[0];
 247         if (dkname[0] != '/') {
 248                 (void)sprintf(np, "%s%s%c", _PATH_DEV, dkname, 'a' + RAW_PART);
 249                 specname = np;
 250                 np += strlen(specname) + 1;
 251         } else
 252                 specname = dkname;
 253         f = open(specname, op == READ ? O_RDONLY : O_RDWR);
 254         if (f < 0 && errno == ENOENT && dkname[0] != '/') {
 255                 (void)sprintf(specname, "%s%s", _PATH_DEV, dkname);
 256                 np = namebuf + strlen(specname) + 1;
 257                 f = open(specname, op == READ ? O_RDONLY : O_RDWR);
 258         }
 259         if (f < 0)
 260                 err(4, "%s", specname);
 261
 262         switch(op) {
 263
 264         case UNSPEC:
 265                 break;
 266
 267         case EDIT:
 268                 if (argc != 1)
 269                         usage();
 270                 lp = readlabel(f);
 271                 error = edit(lp, f);
 272                 break;
 273
 274         case NOWRITE:
 275                 flag = 0;
 276                 if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0)
 277                         err(4, "ioctl DIOCWLABEL");
 278                 break;
 279
 280         case READ:
 281                 if (argc != 1)
 282                         usage();
 283                 lp = readlabel(f);
 284                 display(stdout, lp);
 285                 error = checklabel(lp);
 286                 break;
 287
 288         case RESTORE:
 289 #if NUMBOOT > 0
 290                 if (installboot && argc == 3) {
 291                         makelabel(argv[2], 0, &lab);
 292                         argc--;
 293
 294                         /*
 295                          * We only called makelabel() for its side effect
 296                          * of setting the bootstrap file names.  Discard
 297                          * all changes to `lab' so that all values in the
 298                          * final label come from the ASCII label.
 299                          */
 300                         bzero((char *)&lab, sizeof(lab));
 301                 }
 302 #endif
 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(bootarea, &lab, f);
 310                 *lp = lab;
 311                 error = writelabel(f, bootarea, lp);
 312                 break;
 313
 314         case WRITE:
 315                 if (argc == 3) {
 316                         name = argv[2];
 317                         argc--;
 318                 }
 319                 if (argc != 2)
 320                         usage();
 321                 makelabel(argv[1], name, &lab);
 322                 lp = makebootarea(bootarea, &lab, f);
 323                 *lp = lab;
 324                 if (checklabel(lp) == 0)
 325                         error = writelabel(f, bootarea, lp);
 326                 break;
 327
 328         case WRITEABLE:
 329                 flag = 1;
 330                 if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0)
 331                         err(4, "ioctl DIOCWLABEL");
 332                 break;
 333
 334 #if NUMBOOT > 0
 335         case WRITEBOOT:
 336         {
 337                 struct disklabel tlab;
 338
 339                 lp = readlabel(f);
 340                 tlab = *lp;
 341                 if (argc == 2)
 342                         makelabel(argv[1], 0, &lab);
 343                 lp = makebootarea(bootarea, &lab, f);
 344                 *lp = tlab;
 345                 if (checklabel(lp) == 0)
 346                         error = writelabel(f, bootarea, lp);
 347                 break;
 348         }
 349 #endif
 350         }
 351         exit(error);
 352 }
 353
 354 /*
 355  * Construct a prototype disklabel from /etc/disktab.  As a side
 356  * effect, set the names of the primary and secondary boot files
 357  * if specified.
 358  */
 359 void
 360 makelabel(type, name, lp)
 361         char *type, *name;
 362         register struct disklabel *lp;
 363 {
 364         register struct disklabel *dp;
 365
 366         if (strcmp(type, "auto") == 0)
 367                 dp = getvirginlabel();
 368         else
 369                 dp = getdiskbyname(type);
 370         if (dp == NULL)
 371                 errx(1, "%s: unknown disk type", type);
 372         *lp = *dp;
 373 #if NUMBOOT > 0
 374         /*
 375          * Set bootstrap name(s).
 376          * 1. If set from command line, use those,
 377          * 2. otherwise, check if disktab specifies them (b0 or b1),
 378          * 3. otherwise, makebootarea() will choose ones based on the name
 379          *    of the disk special file. E.g. /dev/ra0 -> raboot, bootra
 380          */
 381         if (!xxboot && lp->d_boot0) {
 382                 if (*lp->d_boot0 != '/')
 383                         (void)sprintf(boot0, "%s/%s",
 384                                       _PATH_BOOTDIR, lp->d_boot0);
 385                 else
 386                         (void)strcpy(boot0, lp->d_boot0);
 387                 xxboot = boot0;
 388         }
 389 #if NUMBOOT > 1
 390         if (!bootxx && lp->d_boot1) {
 391                 if (*lp->d_boot1 != '/')
 392                         (void)sprintf(boot1, "%s/%s",
 393                                       _PATH_BOOTDIR, lp->d_boot1);
 394                 else
 395                         (void)strcpy(boot1, lp->d_boot1);
 396                 bootxx = boot1;
 397         }
 398 #endif
 399 #endif
 400         /* d_packname is union d_boot[01], so zero */
 401         bzero(lp->d_packname, sizeof(lp->d_packname));
 402         if (name)
 403                 (void)strncpy(lp->d_packname, name, sizeof(lp->d_packname));
 404 }
 405
 406 int
 407 writelabel(f, boot, lp)
 408         int f;
 409         char *boot;
 410         register struct disklabel *lp;
 411 {
 412         int flag;
 413 #ifdef __alpha__
 414         u_long *p, sum;
 415         int i;
 416 #endif
 417 #ifdef vax
 418         register int i;
 419 #endif
 420
 421         if (disable_write) {
 422                 Warning("write to disk label supressed - label was as follows:");
 423                 display(stdout, lp);
 424                 return (0);
 425         } else {
 426                 setbootflag(lp);
 427                 lp->d_magic = DISKMAGIC;
 428                 lp->d_magic2 = DISKMAGIC;
 429                 lp->d_checksum = 0;
 430                 lp->d_checksum = dkcksum(lp);
 431                 if (rflag) {
 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 unimplemented,
 436                          * keep going; otherwise, the kernel consistency checks
 437                          * may prevent us from changing the current (in-core)
 438                          * label.
 439                          */
 440                         if (ioctl(f, DIOCSDINFO, lp) < 0 &&
 441                                 errno != ENODEV && errno != ENOTTY) {
 442                                 l_perror("ioctl DIOCSDINFO");
 443                                 return (1);
 444                         }
 445                         (void)lseek(f, (off_t)0, SEEK_SET);
 446
 447 #ifdef __alpha__
 448                         /*
 449                          * Generate the bootblock checksum for the SRM console.
 450                          */
 451                         for (p = (u_long *)boot, i = 0, sum = 0; i < 63; i++)
 452                                 sum += p[i];
 453                         p[63] = sum;
 454 #endif
 455
 456                         /*
 457                          * write enable label sector before write (if necessary),
 458                          * disable after writing.
 459                          */
 460                         flag = 1;
 461                         if (ioctl(f, DIOCWLABEL, &flag) < 0)
 462                                 warn("ioctl DIOCWLABEL");
 463                         if (write(f, boot, lp->d_bbsize) != lp->d_bbsize) {
 464                                 warn("write");
 465                                 return (1);
 466                         }
 467 #if NUMBOOT > 0
 468                         /*
 469                          * Output the remainder of the disklabel
 470                          */
 471                         if (bootbuf && write(f, bootbuf, bootsize) != bootsize) {
 472                                 warn("write");
 473                                 return(1);
 474                         }
 475 #endif
 476                         flag = 0;
 477                         (void) ioctl(f, DIOCWLABEL, &flag);
 478                 } else if (ioctl(f, DIOCWDINFO, lp) < 0) {
 479                         l_perror("ioctl DIOCWDINFO");
 480                         return (1);
 481                 }
 482 #ifdef vax
 483                 if (lp->d_type == DTYPE_SMD && lp->d_flags & D_BADSECT) {
 484                         daddr_t alt;
 485
 486                         alt = lp->d_ncylinders * lp->d_secpercyl - lp->d_nsectors;
 487                         for (i = 1; i < 11 && i < lp->d_nsectors; i += 2) {
 488                                 (void)lseek(f, (off_t)((alt + i) * lp->d_secsize),
 489                                                         SEEK_SET);
 490                                 if (write(f, boot, lp->d_secsize) < lp->d_secsize)
 491                                         warn("alternate label %d write", i/2);
 492                         }
 493                 }
 494 #endif
 495         }
 496         return (0);
 497 }
 498
 499 void
 500 l_perror(s)
 501         char *s;
 502 {
 503         switch (errno) {
 504
 505         case ESRCH:
 506                 warnx("%s: no disk label on disk;", s);
 507                 fprintf(stderr, "add \"-r\" to install initial label\n");
 508                 break;
 509
 510         case EINVAL:
 511                 warnx("%s: label magic number or checksum is wrong!", s);
 512                 fprintf(stderr, "(disklabel or kernel is out of date?)\n");
 513                 break;
 514
 515         case EBUSY:
 516                 warnx("%s: open partition would move or shrink", s);
 517                 break;
 518
 519         case EXDEV:
 520                 warnx("%s: '%c' partition must start at beginning of disk",
 521                     s, 'a' + RAW_PART);
 522                 break;
 523
 524         default:
 525                 warn((char *)NULL);
 526                 break;
 527         }
 528 }
 529
 530 /*
 531  * Fetch disklabel for disk.
 532  * Use ioctl to get label unless -r flag is given.
 533  */
 534 struct disklabel *
 535 readlabel(f)
 536         int f;
 537 {
 538         register struct disklabel *lp;
 539
 540         if (rflag) {
 541                 if (read(f, bootarea, BBSIZE) < BBSIZE)
 542                         err(4, "%s", specname);
 543                 for (lp = (struct disklabel *)bootarea;
 544                     lp <= (struct disklabel *)(bootarea + BBSIZE - sizeof(*lp));
 545                     lp = (struct disklabel *)((char *)lp + 16))
 546                         if (lp->d_magic == DISKMAGIC &&
 547                             lp->d_magic2 == DISKMAGIC)
 548                                 break;
 549                 if (lp > (struct disklabel *)(bootarea+BBSIZE-sizeof(*lp)) ||
 550                     lp->d_magic != DISKMAGIC || lp->d_magic2 != DISKMAGIC ||
 551                     dkcksum(lp) != 0)
 552                         errx(1,
 553             "bad pack magic number (label is damaged, or pack is unlabeled)");
 554         } else {
 555                 lp = &lab;
 556                 if (ioctl(f, DIOCGDINFO, lp) < 0)
 557                         err(4, "ioctl DIOCGDINFO");
 558         }
 559         return (lp);
 560 }
 561
 562 /*
 563  * Construct a bootarea (d_bbsize bytes) in the specified buffer ``boot''
 564  * Returns a pointer to the disklabel portion of the bootarea.
 565  */
 566 struct disklabel *
 567 makebootarea(boot, dp, f)
 568         char *boot;
 569         register struct disklabel *dp;
 570         int f;
 571 {
 572         struct disklabel *lp;
 573         register char *p;
 574         int b;
 575 #if NUMBOOT > 0
 576         char *dkbasename;
 577         struct stat sb;
 578 #endif
 579 #ifdef __alpha__
 580         u_long *bootinfo;
 581         int n;
 582 #endif
 583 #ifdef __i386__
 584         char *tmpbuf;
 585         int i, found;
 586 #endif
 587
 588         /* XXX */
 589         if (dp->d_secsize == 0) {
 590                 dp->d_secsize = DEV_BSIZE;
 591                 dp->d_bbsize = BBSIZE;
 592         }
 593         lp = (struct disklabel *)
 594                 (boot + (LABELSECTOR * dp->d_secsize) + LABELOFFSET);
 595         bzero((char *)lp, sizeof *lp);
 596 #if NUMBOOT > 0
 597         /*
 598          * If we are not installing a boot program but we are installing a
 599          * label on disk then we must read the current bootarea so we don't
 600          * clobber the existing boot.
 601          */
 602         if (!installboot) {
 603                 if (rflag) {
 604                         if (read(f, boot, BBSIZE) < BBSIZE)
 605                                 err(4, "%s", specname);
 606                         bzero((char *)lp, sizeof *lp);
 607                 }
 608                 return (lp);
 609         }
 610         /*
 611          * We are installing a boot program.  Determine the name(s) and
 612          * read them into the appropriate places in the boot area.
 613          */
 614         if (!xxboot || !bootxx) {
 615                 dkbasename = np;
 616                 if ((p = rindex(dkname, '/')) == NULL)
 617                         p = dkname;
 618                 else
 619                         p++;
 620                 while (*p && !isdigit(*p))
 621                         *np++ = *p++;
 622                 *np++ = '\0';
 623
 624                 if (!xxboot) {
 625                         (void)sprintf(boot0, "%s/boot1", _PATH_BOOTDIR);
 626                         xxboot = boot0;
 627                 }
 628 #if NUMBOOT > 1
 629                 if (!bootxx) {
 630                         (void)sprintf(boot1, "%s/boot2", _PATH_BOOTDIR);
 631                         bootxx = boot1;
 632                 }
 633 #endif
 634         }
 635 #ifdef DEBUG
 636         if (debug)
 637                 fprintf(stderr, "bootstraps: xxboot = %s, bootxx = %s\n",
 638                         xxboot, bootxx ? bootxx : "NONE");
 639 #endif
 640
 641         /*
 642          * Strange rules:
 643          * 1. One-piece bootstrap (hp300/hp800)
 644          *      up to d_bbsize bytes of ``xxboot'' go in bootarea, the rest
 645          *      is remembered and written later following the bootarea.
 646          * 2. Two-piece bootstraps (vax/i386?/mips?)
 647          *      up to d_secsize bytes of ``xxboot'' go in first d_secsize
 648          *      bytes of bootarea, remaining d_bbsize-d_secsize filled
 649          *      from ``bootxx''.
 650          */
 651         b = open(xxboot, O_RDONLY);
 652         if (b < 0)
 653                 err(4, "%s", xxboot);
 654 #if NUMBOOT > 1
 655 #ifdef __i386__
 656         /*
 657          * XXX Botch alert.
 658          * The i386 has the so-called fdisk table embedded into the
 659          * primary bootstrap.  We take care to not clobber it, but
 660          * only if it does already contain some data.  (Otherwise,
 661          * the xxboot provides a template.)
 662          */
 663         if ((tmpbuf = (char *)malloc((int)dp->d_secsize)) == 0)
 664                 err(4, "%s", xxboot);
 665         memcpy((void *)tmpbuf, (void *)boot, (int)dp->d_secsize);
 666 #endif /* i386 */
 667         if (read(b, boot, (int)dp->d_secsize) < 0)
 668                 err(4, "%s", xxboot);
 669         (void)close(b);
 670 #ifdef __i386__
 671         for (i = DOSPARTOFF, found = 0;
 672              !found && i < DOSPARTOFF + NDOSPART*sizeof(struct dos_partition);
 673              i++)
 674                 found = tmpbuf[i] != 0;
 675         if (found)
 676                 memcpy((void *)&boot[DOSPARTOFF],
 677                        (void *)&tmpbuf[DOSPARTOFF],
 678                        NDOSPART * sizeof(struct dos_partition));
 679         free(tmpbuf);
 680 #endif /* i386 */
 681         b = open(bootxx, O_RDONLY);
 682         if (b < 0)
 683                 err(4, "%s", bootxx);
 684         if (fstat(b, &sb) != 0)
 685                 err(4, "%s", bootxx);
 686         if (dp->d_secsize + sb.st_size > dp->d_bbsize)
 687                 errx(4, "%s too large", bootxx);
 688         if (read(b, &boot[dp->d_secsize],
 689                  (int)(dp->d_bbsize-dp->d_secsize)) < 0)
 690                 err(4, "%s", bootxx);
 691 #else /* !(NUMBOOT > 1) */
 692 #ifdef __alpha__
 693         /*
 694          * On the alpha, the primary bootstrap starts at the
 695          * second sector of the boot area.  The first sector
 696          * contains the label and must be edited to contain the
 697          * size and location of the primary bootstrap.
 698          */
 699         n = read(b, boot + dp->d_secsize, (int)dp->d_bbsize);
 700         if (n < 0)
 701                 err(4, "%s", xxboot);
 702         bootinfo = (u_long *)(boot + 480);
 703         bootinfo[0] = (n + dp->d_secsize - 1) / dp->d_secsize;
 704         bootinfo[1] = 1;        /* start at sector 1 */
 705         bootinfo[2] = 0;        /* flags (must be zero) */
 706 #else /* !__alpha__ */
 707         if (read(b, boot, (int)dp->d_bbsize) < 0)
 708                 err(4, "%s", xxboot);
 709 #endif /* __alpha__ */
 710         if (fstat(b, &sb) != 0)
 711                 err(4, "%s", xxboot);
 712         bootsize = (int)sb.st_size - dp->d_bbsize;
 713         if (bootsize > 0) {
 714                 /* XXX assume d_secsize is a power of two */
 715                 bootsize = (bootsize + dp->d_secsize-1) & ~(dp->d_secsize-1);
 716                 bootbuf = (char *)malloc((size_t)bootsize);
 717                 if (bootbuf == 0)
 718                         err(4, "%s", xxboot);
 719                 if (read(b, bootbuf, bootsize) < 0) {
 720                         free(bootbuf);
 721                         err(4, "%s", xxboot);
 722                 }
 723         }
 724 #endif /* NUMBOOT > 1 */
 725         (void)close(b);
 726 #endif /* NUMBOOT > 0 */
 727         /*
 728          * Make sure no part of the bootstrap is written in the area
 729          * reserved for the label.
 730          */
 731         for (p = (char *)lp; p < (char *)lp + sizeof(struct disklabel); p++)
 732                 if (*p)
 733                         errx(2, "bootstrap doesn't leave room for disk label");
 734         return (lp);
 735 }
 736
 737 void
 738 display(f, lp)
 739         FILE *f;
 740         register struct disklabel *lp;
 741 {
 742         register int i, j;
 743         register struct partition *pp;
 744
 745         fprintf(f, "# %s:\n", specname);
 746         if ((unsigned) lp->d_type < DKMAXTYPES)
 747                 fprintf(f, "type: %s\n", dktypenames[lp->d_type]);
 748         else
 749                 fprintf(f, "type: %u\n", lp->d_type);
 750         fprintf(f, "disk: %.*s\n", (int)sizeof(lp->d_typename),
 751                 lp->d_typename);
 752         fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname),
 753                 lp->d_packname);
 754         fprintf(f, "flags:");
 755         if (lp->d_flags & D_REMOVABLE)
 756                 fprintf(f, " removeable");
 757         if (lp->d_flags & D_ECC)
 758                 fprintf(f, " ecc");
 759         if (lp->d_flags & D_BADSECT)
 760                 fprintf(f, " badsect");
 761         fprintf(f, "\n");
 762         fprintf(f, "bytes/sector: %lu\n", (u_long)lp->d_secsize);
 763         fprintf(f, "sectors/track: %lu\n", (u_long)lp->d_nsectors);
 764         fprintf(f, "tracks/cylinder: %lu\n", (u_long)lp->d_ntracks);
 765         fprintf(f, "sectors/cylinder: %lu\n", (u_long)lp->d_secpercyl);
 766         fprintf(f, "cylinders: %lu\n", (u_long)lp->d_ncylinders);
 767         fprintf(f, "sectors/unit: %lu\n", (u_long)lp->d_secperunit);
 768         fprintf(f, "rpm: %u\n", lp->d_rpm);
 769         fprintf(f, "interleave: %u\n", lp->d_interleave);
 770         fprintf(f, "trackskew: %u\n", lp->d_trackskew);
 771         fprintf(f, "cylinderskew: %u\n", lp->d_cylskew);
 772         fprintf(f, "headswitch: %lu\t\t# milliseconds\n",
 773             (u_long)lp->d_headswitch);
 774         fprintf(f, "track-to-track seek: %ld\t# milliseconds\n",
 775             (u_long)lp->d_trkseek);
 776         fprintf(f, "drivedata: ");
 777         for (i = NDDATA - 1; i >= 0; i--)
 778                 if (lp->d_drivedata[i])
 779                         break;
 780         if (i < 0)
 781                 i = 0;
 782         for (j = 0; j <= i; j++)
 783                 fprintf(f, "%lu ", (u_long)lp->d_drivedata[j]);
 784         fprintf(f, "\n\n%u partitions:\n", lp->d_npartitions);
 785         fprintf(f,
 786             "#        size   offset    fstype   [fsize bsize bps/cpg]\n");
 787         pp = lp->d_partitions;
 788         for (i = 0; i < lp->d_npartitions; i++, pp++) {
 789                 if (pp->p_size) {
 790                         fprintf(f, "  %c: %8lu %8lu  ", 'a' + i,
 791                            (u_long)pp->p_size, (u_long)pp->p_offset);
 792                         if ((unsigned) pp->p_fstype < FSMAXTYPES)
 793                                 fprintf(f, "%8.8s", fstypenames[pp->p_fstype]);
 794                         else
 795                                 fprintf(f, "%8d", pp->p_fstype);
 796                         switch (pp->p_fstype) {
 797
 798                         case FS_UNUSED:                         /* XXX */
 799                                 fprintf(f, "    %5lu %5lu %5.5s ",
 800                                     (u_long)pp->p_fsize,
 801                                     (u_long)(pp->p_fsize * pp->p_frag), "");
 802                                 break;
 803
 804                         case FS_BSDFFS:
 805                                 fprintf(f, "    %5lu %5lu %5u ",
 806                                     (u_long)pp->p_fsize,
 807                                     (u_long)(pp->p_fsize * pp->p_frag),
 808                                     pp->p_cpg);
 809                                 break;
 810
 811                         case FS_BSDLFS:
 812                                 fprintf(f, "    %5lu %5lu %5d",
 813                                     (u_long)pp->p_fsize,
 814                                     (u_long)(pp->p_fsize * pp->p_frag),
 815                                     pp->p_cpg);
 816                                 break;
 817
 818                         default:
 819                                 fprintf(f, "%20.20s", "");
 820                                 break;
 821                         }
 822                         fprintf(f, "\t# (Cyl. %4lu",
 823                             (u_long)(pp->p_offset / lp->d_secpercyl));
 824                         if (pp->p_offset % lp->d_secpercyl)
 825                             putc('*', f);
 826                         else
 827                             putc(' ', f);
 828                         fprintf(f, "- %lu",
 829                             (u_long)((pp->p_offset + pp->p_size +
 830                             lp->d_secpercyl - 1) /
 831                             lp->d_secpercyl - 1));
 832                         if (pp->p_size % lp->d_secpercyl)
 833                             putc('*', f);
 834                         fprintf(f, ")\n");
 835                 }
 836         }
 837         fflush(f);
 838 }
 839
 840 int
 841 edit(lp, f)
 842         struct disklabel *lp;
 843         int f;
 844 {
 845         register int c, fd;
 846         struct disklabel label;
 847         FILE *fp;
 848
 849         if ((fd = mkstemp(tmpfil)) == -1 ||
 850             (fp = fdopen(fd, "w")) == NULL) {
 851                 warnx("can't create %s", tmpfil);
 852                 return (1);
 853         }
 854         display(fp, lp);
 855         fclose(fp);
 856         for (;;) {
 857                 if (!editit())
 858                         break;
 859                 fp = fopen(tmpfil, "r");
 860                 if (fp == NULL) {
 861                         warnx("can't reopen %s for reading", tmpfil);
 862                         break;
 863                 }
 864                 bzero((char *)&label, sizeof(label));
 865                 if (getasciilabel(fp, &label)) {
 866                         *lp = label;
 867                         if (writelabel(f, bootarea, lp) == 0) {
 868                                 fclose(fp);
 869                                 (void) unlink(tmpfil);
 870                                 return (0);
 871                         }
 872                 }
 873                 fclose(fp);
 874                 printf("re-edit the label? [y]: "); fflush(stdout);
 875                 c = getchar();
 876                 if (c != EOF && c != (int)'\n')
 877                         while (getchar() != (int)'\n')
 878                                 ;
 879                 if  (c == (int)'n')
 880                         break;
 881         }
 882         (void) unlink(tmpfil);
 883         return (1);
 884 }
 885
 886 int
 887 editit()
 888 {
 889         register int pid, xpid;
 890         int stat, omask;
 891
 892         omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP));
 893         while ((pid = fork()) < 0) {
 894                 if (errno == EPROCLIM) {
 895                         warnx("you have too many processes");
 896                         return(0);
 897                 }
 898                 if (errno != EAGAIN) {
 899                         warn("fork");
 900                         return(0);
 901                 }
 902                 sleep(1);
 903         }
 904         if (pid == 0) {
 905                 register char *ed;
 906
 907                 sigsetmask(omask);
 908                 setgid(getgid());
 909                 setuid(getuid());
 910                 if ((ed = getenv("EDITOR")) == (char *)0)
 911                         ed = DEFEDITOR;
 912                 execlp(ed, ed, tmpfil, (char *)0);
 913                 err(1, "%s", ed);
 914         }
 915         while ((xpid = wait(&stat)) >= 0)
 916                 if (xpid == pid)
 917                         break;
 918         sigsetmask(omask);
 919         return(!stat);
 920 }
 921
 922 char *
 923 skip(cp)
 924         register char *cp;
 925 {
 926
 927         while (*cp != '\0' && isspace(*cp))
 928                 cp++;
 929         if (*cp == '\0' || *cp == '#')
 930                 return ((char *)NULL);
 931         return (cp);
 932 }
 933
 934 char *
 935 word(cp)
 936         register char *cp;
 937 {
 938         register char c;
 939
 940         while (*cp != '\0' && !isspace(*cp) && *cp != '#')
 941                 cp++;
 942         if ((c = *cp) != '\0') {
 943                 *cp++ = '\0';
 944                 if (c != '#')
 945                         return (skip(cp));
 946         }
 947         return ((char *)NULL);
 948 }
 949
 950 /*
 951  * Read an ascii label in from fd f,
 952  * in the same format as that put out by display(),
 953  * and fill in lp.
 954  */
 955 int
 956 getasciilabel(f, lp)
 957         FILE    *f;
 958         register struct disklabel *lp;
 959 {
 960         register char **cpp, *cp;
 961         register struct partition *pp;
 962         unsigned int part;
 963         char *tp, *s, line[BUFSIZ];
 964         int v, lineno = 0, errors = 0;
 965
 966         lp->d_bbsize = BBSIZE;                          /* XXX */
 967         lp->d_sbsize = SBSIZE;                          /* XXX */
 968         while (fgets(line, sizeof(line) - 1, f)) {
 969                 lineno++;
 970                 if ((cp = index(line,'\n')) != 0)
 971                         *cp = '\0';
 972                 cp = skip(line);
 973                 if (cp == NULL)
 974                         continue;
 975                 tp = index(cp, ':');
 976                 if (tp == NULL) {
 977                         fprintf(stderr, "line %d: syntax error\n", lineno);
 978                         errors++;
 979                         continue;
 980                 }
 981                 *tp++ = '\0', tp = skip(tp);
 982                 if (streq(cp, "type")) {
 983                         if (tp == NULL)
 984                                 tp = "unknown";
 985                         cpp = dktypenames;
 986                         for (; cpp < &dktypenames[DKMAXTYPES]; cpp++)
 987                                 if ((s = *cpp) && streq(s, tp)) {
 988                                         lp->d_type = cpp - dktypenames;
 989                                         goto next;
 990                                 }
 991                         v = atoi(tp);
 992                         if ((unsigned)v >= DKMAXTYPES)
 993                                 fprintf(stderr, "line %d:%s %d\n", lineno,
 994                                     "Warning, unknown disk type", v);
 995                         lp->d_type = v;
 996                         continue;
 997                 }
 998                 if (streq(cp, "flags")) {
 999                         for (v = 0; (cp = tp) && *cp != '\0';) {
1000                                 tp = word(cp);
1001                                 if (streq(cp, "removeable"))
1002                                         v |= D_REMOVABLE;
1003                                 else if (streq(cp, "ecc"))
1004                                         v |= D_ECC;
1005                                 else if (streq(cp, "badsect"))
1006                                         v |= D_BADSECT;
1007                                 else {
1008                                         fprintf(stderr,
1009                                             "line %d: %s: bad flag\n",
1010                                             lineno, cp);
1011                                         errors++;
1012                                 }
1013                         }
1014                         lp->d_flags = v;
1015                         continue;
1016                 }
1017                 if (streq(cp, "drivedata")) {
1018                         register int i;
1019
1020                         for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA;) {
1021                                 lp->d_drivedata[i++] = atoi(cp);
1022                                 tp = word(cp);
1023                         }
1024                         continue;
1025                 }
1026                 if (sscanf(cp, "%d partitions", &v) == 1) {
1027                         if (v == 0 || (unsigned)v > MAXPARTITIONS) {
1028                                 fprintf(stderr,
1029                                     "line %d: bad # of partitions\n", lineno);
1030                                 lp->d_npartitions = MAXPARTITIONS;
1031                                 errors++;
1032                         } else
1033                                 lp->d_npartitions = v;
1034                         continue;
1035                 }
1036                 if (tp == NULL)
1037                         tp = "";
1038                 if (streq(cp, "disk")) {
1039                         strncpy(lp->d_typename, tp, sizeof (lp->d_typename));
1040                         continue;
1041                 }
1042                 if (streq(cp, "label")) {
1043                         strncpy(lp->d_packname, tp, sizeof (lp->d_packname));
1044                         continue;
1045                 }
1046                 if (streq(cp, "bytes/sector")) {
1047                         v = atoi(tp);
1048                         if (v <= 0 || (v % DEV_BSIZE) != 0) {
1049                                 fprintf(stderr,
1050                                     "line %d: %s: bad sector size\n",
1051                                     lineno, tp);
1052                                 errors++;
1053                         } else
1054                                 lp->d_secsize = v;
1055                         continue;
1056                 }
1057                 if (streq(cp, "sectors/track")) {
1058                         v = atoi(tp);
1059                         if (v <= 0) {
1060                                 fprintf(stderr, "line %d: %s: bad %s\n",
1061                                     lineno, tp, cp);
1062                                 errors++;
1063                         } else
1064                                 lp->d_nsectors = v;
1065                         continue;
1066                 }
1067                 if (streq(cp, "sectors/cylinder")) {
1068                         v = atoi(tp);
1069                         if (v <= 0) {
1070                                 fprintf(stderr, "line %d: %s: bad %s\n",
1071                                     lineno, tp, cp);
1072                                 errors++;
1073                         } else
1074                                 lp->d_secpercyl = v;
1075                         continue;
1076                 }
1077                 if (streq(cp, "tracks/cylinder")) {
1078                         v = atoi(tp);
1079                         if (v <= 0) {
1080                                 fprintf(stderr, "line %d: %s: bad %s\n",
1081                                     lineno, tp, cp);
1082                                 errors++;
1083                         } else
1084                                 lp->d_ntracks = v;
1085                         continue;
1086                 }
1087                 if (streq(cp, "cylinders")) {
1088                         v = atoi(tp);
1089                         if (v <= 0) {
1090                                 fprintf(stderr, "line %d: %s: bad %s\n",
1091                                     lineno, tp, cp);
1092                                 errors++;
1093                         } else
1094                                 lp->d_ncylinders = v;
1095                         continue;
1096                 }
1097                 if (streq(cp, "sectors/unit")) {
1098                         v = atoi(tp);
1099                         if (v <= 0) {
1100                                 fprintf(stderr, "line %d: %s: bad %s\n",
1101                                     lineno, tp, cp);
1102                                 errors++;
1103                         } else
1104                                 lp->d_secperunit = v;
1105                         continue;
1106                 }
1107                 if (streq(cp, "rpm")) {
1108                         v = atoi(tp);
1109                         if (v <= 0) {
1110                                 fprintf(stderr, "line %d: %s: bad %s\n",
1111                                     lineno, tp, cp);
1112                                 errors++;
1113                         } else
1114                                 lp->d_rpm = v;
1115                         continue;
1116                 }
1117                 if (streq(cp, "interleave")) {
1118                         v = atoi(tp);
1119                         if (v <= 0) {
1120                                 fprintf(stderr, "line %d: %s: bad %s\n",
1121                                     lineno, tp, cp);
1122                                 errors++;
1123                         } else
1124                                 lp->d_interleave = v;
1125                         continue;
1126                 }
1127                 if (streq(cp, "trackskew")) {
1128                         v = atoi(tp);
1129                         if (v < 0) {
1130                                 fprintf(stderr, "line %d: %s: bad %s\n",
1131                                     lineno, tp, cp);
1132                                 errors++;
1133                         } else
1134                                 lp->d_trackskew = v;
1135                         continue;
1136                 }
1137                 if (streq(cp, "cylinderskew")) {
1138                         v = atoi(tp);
1139                         if (v < 0) {
1140                                 fprintf(stderr, "line %d: %s: bad %s\n",
1141                                     lineno, tp, cp);
1142                                 errors++;
1143                         } else
1144                                 lp->d_cylskew = v;
1145                         continue;
1146                 }
1147                 if (streq(cp, "headswitch")) {
1148                         v = atoi(tp);
1149                         if (v < 0) {
1150                                 fprintf(stderr, "line %d: %s: bad %s\n",
1151                                     lineno, tp, cp);
1152                                 errors++;
1153                         } else
1154                                 lp->d_headswitch = v;
1155                         continue;
1156                 }
1157                 if (streq(cp, "track-to-track seek")) {
1158                         v = atoi(tp);
1159                         if (v < 0) {
1160                                 fprintf(stderr, "line %d: %s: bad %s\n",
1161                                     lineno, tp, cp);
1162                                 errors++;
1163                         } else
1164                                 lp->d_trkseek = v;
1165                         continue;
1166                 }
1167                 /* the ':' was removed above */
1168                 if ('a' <= *cp && *cp <= MAX_PART && cp[1] == '\0') {
1169                         part = *cp - 'a';
1170                         if (part >= lp->d_npartitions) {
1171                                 fprintf(stderr,
1172                                     "line %d: partition name out of range a-%c: %s\n",
1173                                     lineno, 'a' + lp->d_npartitions - 1, cp);
1174                                 errors++;
1175                                 continue;
1176                         }
1177                         pp = &lp->d_partitions[part];
1178                         part_set[part] = 1;
1179 #define NXTNUM(n) { \
1180         if (tp == NULL) { \
1181                 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \
1182                 errors++; \
1183                 break; \
1184         } else { \
1185                 cp = tp, tp = word(cp); \
1186                 if (tp == NULL) \
1187                         tp = cp; \
1188                 (n) = atoi(cp); \
1189         } \
1190      }
1191 /* retain 1 character following number */
1192 #define NXTWORD(w,n) { \
1193         if (tp == NULL) { \
1194                 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \
1195                 errors++; \
1196                 break; \
1197         } else { \
1198                 char *tmp; \
1199                 cp = tp, tp = word(cp); \
1200                 if (tp == NULL) \
1201                         tp = cp; \
1202                 (n) = strtol(cp,&tmp,10); \
1203                 if (tmp) (w) = *tmp; \
1204         } \
1205      }
1206                         v = 0;
1207                         NXTWORD(part_size_type[part],v);
1208                         if (v < 0 || (v == 0 && part_size_type[part] != '*')) {
1209                                 fprintf(stderr,
1210                                     "line %d: %s: bad partition size\n",
1211                                     lineno, cp);
1212                                 errors++;
1213                                 break;
1214                         } else {
1215                                 pp->p_size = v;
1216
1217                                 v = 0;
1218                                 NXTWORD(part_offset_type[part],v);
1219                                 if (v < 0 || (v == 0 &&
1220                                     part_offset_type[part] != '*' &&
1221                                     part_offset_type[part] != '\0')) {
1222                                         fprintf(stderr,
1223                                             "line %d: %s: bad partition offset\n",
1224                                             lineno, cp);
1225                                         errors++;
1226                                         break;
1227                                 } else {
1228                                         pp->p_offset = v;
1229                                         cp = tp, tp = word(cp);
1230                                         cpp = fstypenames;
1231                                         for (; cpp < &fstypenames[FSMAXTYPES]; cpp++)
1232                                                 if ((s = *cpp) && streq(s, cp)) {
1233                                                         pp->p_fstype = cpp -
1234                                                             fstypenames;
1235                                                         goto gottype;
1236                                                 }
1237                                         if (isdigit(*cp))
1238                                                 v = atoi(cp);
1239                                         else
1240                                                 v = FSMAXTYPES;
1241                                         if ((unsigned)v >= FSMAXTYPES) {
1242                                                 fprintf(stderr,
1243                                                     "line %d: Warning, unknown "
1244                                                     "filesystem type %s\n",
1245                                                     lineno, cp);
1246                                                 v = FS_UNUSED;
1247                                         }
1248                                         pp->p_fstype = v;
1249                                 gottype:;
1250                                         /*
1251                                          * Note: NXTNUM will break us out of the
1252                                          * switch only!
1253                                          */
1254                                         switch (pp->p_fstype) {
1255                                         case FS_UNUSED:
1256                                                 /*
1257                                                  * allow us to accept defaults for
1258                                                  * fsize/frag/cpg
1259                                                  */
1260                                                 if (tp) {
1261                                                         NXTNUM(pp->p_fsize);
1262                                                         if (pp->p_fsize == 0)
1263                                                                 break;
1264                                                         NXTNUM(v);
1265                                                         pp->p_frag = v / pp->p_fsize;
1266                                                 }
1267                                                 /* else default to 0's */
1268                                                 break;
1269
1270                                         /* These happen to be the same */
1271                                         case FS_BSDFFS:
1272                                         case FS_BSDLFS:
1273                                                 if (tp) {
1274                                                         NXTNUM(pp->p_fsize);
1275                                                         if (pp->p_fsize == 0)
1276                                                                 break;
1277                                                         NXTNUM(v);
1278                                                         pp->p_frag = v / pp->p_fsize;
1279                                                         NXTNUM(pp->p_cpg);
1280                                                 } else {
1281                                                         /*
1282                                                          * FIX! poor attempt at
1283                                                          * adaptive
1284                                                          */
1285                                                         /* 1 GB */
1286                                                         if (pp->p_size < 1*1024*1024*1024/lp->d_secsize) {
1287 /* FIX!  These are too low, but are traditional */
1288                                                                 pp->p_fsize = DEFAULT_NEWFS_BLOCK;
1289                                                                 pp->p_frag  = (unsigned char) DEFAULT_NEWFS_FRAG;
1290                                                                 pp->p_cpg   = DEFAULT_NEWFS_CPG;
1291                                                         } else {
1292                                                                 pp->p_fsize = BIG_NEWFS_BLOCK;
1293                                                                 pp->p_frag  = (unsigned char) BIG_NEWFS_FRAG;
1294                                                                 pp->p_cpg   = BIG_NEWFS_CPG;
1295                                                         }
1296                                                 }
1297                                                 break;
1298                                         default:
1299                                                 break;
1300                                         }
1301
1302                                         /*
1303                                          * note: we may not have
1304                                          * gotten all the entries for
1305                                          * the fs though if we didn't,
1306                                          * errors will be set.
1307                                          */
1308                                 }
1309                         }
1310                         continue;
1311                 }
1312                 fprintf(stderr, "line %d: %s: Unknown disklabel field\n",
1313                     lineno, cp);
1314                 errors++;
1315         next:;
1316         }
1317         errors += checklabel(lp);
1318         return (errors == 0);
1319 }
1320
1321 /*
1322  * Check disklabel for errors and fill in
1323  * derived fields according to supplied values.
1324  */
1325 int
1326 checklabel(lp)
1327         register struct disklabel *lp;
1328 {
1329         register struct partition *pp;
1330         int i, errors = 0;
1331         char part;
1332         unsigned long total_size, total_percent, current_offset;
1333         int seen_default_offset;
1334         int hog_part;
1335         int j;
1336         struct partition *pp2;
1337
1338         if (lp->d_secsize == 0) {
1339                 fprintf(stderr, "sector size 0\n");
1340                 return (1);
1341         }
1342         if (lp->d_nsectors == 0) {
1343                 fprintf(stderr, "sectors/track 0\n");
1344                 return (1);
1345         }
1346         if (lp->d_ntracks == 0) {
1347                 fprintf(stderr, "tracks/cylinder 0\n");
1348                 return (1);
1349         }
1350         if  (lp->d_ncylinders == 0) {
1351                 fprintf(stderr, "cylinders/unit 0\n");
1352                 errors++;
1353         }
1354         if (lp->d_rpm == 0)
1355                 Warning("revolutions/minute 0");
1356         if (lp->d_secpercyl == 0)
1357                 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks;
1358         if (lp->d_secperunit == 0)
1359                 lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders;
1360         if (lp->d_bbsize == 0) {
1361                 fprintf(stderr, "boot block size 0\n");
1362                 errors++;
1363         } else if (lp->d_bbsize % lp->d_secsize)
1364                 Warning("boot block size %% sector-size != 0");
1365         if (lp->d_sbsize == 0) {
1366                 fprintf(stderr, "super block size 0\n");
1367                 errors++;
1368         } else if (lp->d_sbsize % lp->d_secsize)
1369                 Warning("super block size %% sector-size != 0");
1370         if (lp->d_npartitions > MAXPARTITIONS)
1371                 Warning("number of partitions (%lu) > MAXPARTITIONS (%d)",
1372                     (u_long)lp->d_npartitions, MAXPARTITIONS);
1373
1374         /* first allocate space to the partitions, then offsets */
1375         total_size = 0; /* in sectors */
1376         total_percent = 0; /* in percent */
1377         hog_part = -1;
1378         /* find all fixed partitions */
1379         for (i = 0; i < lp->d_npartitions; i++) {
1380                 pp = &lp->d_partitions[i];
1381                 if (part_set[i]) {
1382                         if (part_size_type[i] == '*') {
1383                                 /* partition 2 ('c') is special */
1384                                 if (i == FULL_DISK_PART) {
1385                                         pp->p_size = lp->d_secperunit;
1386                                 } else {
1387                                         if (hog_part != -1)
1388                                                 Warning("Too many '*' partitions (%c and %c)",
1389                                                     hog_part + 'a',i + 'a');
1390                                         else
1391                                                 hog_part = i;
1392                                 }
1393                         } else {
1394                                 off_t size;
1395
1396                                 size = pp->p_size;
1397                                 switch (part_size_type[i]) {
1398                                 case '%':
1399                                         total_percent += size;
1400                                         break;
1401                                 case 'k':
1402                                 case 'K':
1403                                         size *= 1024ULL;
1404                                         break;
1405                                 case 'm':
1406                                 case 'M':
1407                                         size *= 1024ULL * 1024ULL;
1408                                         break;
1409                                 case 'g':
1410                                 case 'G':
1411                                         size *= 1024ULL * 1024ULL * 1024ULL;
1412                                         break;
1413                                 case '\0':
1414                                         break;
1415                                 default:
1416                                         Warning("unknown size specifier '%c' (K/M/G are valid)",part_size_type[i]);
1417                                         break;
1418                                 }
1419                                 /* don't count %'s yet */
1420                                 if (part_size_type[i] != '%') {
1421                                         /*
1422                                          * for all not in sectors, convert to
1423                                          * sectors
1424                                          */
1425                                         if (part_size_type[i] != '\0') {
1426                                                 if (size % lp->d_secsize != 0)
1427                                                         Warning("partition %c not an integer number of sectors",
1428                                                             i + 'a');
1429                                                 size /= lp->d_secsize;
1430                                                 pp->p_size = size;
1431                                         }
1432                                         /* else already in sectors */
1433                                         /* partition 2 ('c') is special */
1434                                         if (i != FULL_DISK_PART)
1435                                                 total_size += size;
1436                                 }
1437                         }
1438                 }
1439         }
1440         /* handle % partitions - note %'s don't need to add up to 100! */
1441         if (total_percent != 0) {
1442                 long free_space = lp->d_secperunit - total_size;
1443                 if (total_percent > 100) {
1444                         fprintf(stderr,"total percentage %d is greater than 100\n",
1445                             total_percent);
1446                         errors++;
1447                 }
1448
1449                 if (free_space > 0) {
1450                         for (i = 0; i < lp->d_npartitions; i++) {
1451                                 pp = &lp->d_partitions[i];
1452                                 if (part_set[i] && part_size_type[i] == '%') {
1453                                         /* careful of overflows! and integer roundoff */
1454                                         pp->p_size = ((double)pp->p_size/100) * free_space;
1455                                         total_size += pp->p_size;
1456
1457                                         /* FIX we can lose a sector or so due to roundoff per
1458                                            partition.  A more complex algorithm could avoid that */
1459                                 }
1460                         }
1461                 } else {
1462                         fprintf(stderr,
1463                             "%ld sectors available to give to '*' and '%' partitions\n",
1464                             free_space);
1465                         errors++;
1466                         /* fix?  set all % partitions to size 0? */
1467                 }
1468         }
1469         /* give anything remaining to the hog partition */
1470         if (hog_part != -1) {
1471                 lp->d_partitions[hog_part].p_size = lp->d_secperunit - total_size;
1472                 total_size = lp->d_secperunit;
1473         }
1474
1475         /* Now set the offsets for each partition */
1476         current_offset = 0; /* in sectors */
1477         seen_default_offset = 0;
1478         for (i = 0; i < lp->d_npartitions; i++) {
1479                 part = 'a' + i;
1480                 pp = &lp->d_partitions[i];
1481                 if (part_set[i]) {
1482                         if (part_offset_type[i] == '*') {
1483                                 /* partition 2 ('c') is special */
1484                                 if (i == FULL_DISK_PART) {
1485                                         pp->p_offset = 0;
1486                                 } else {
1487                                         pp->p_offset = current_offset;
1488                                         seen_default_offset = 1;
1489                                 }
1490                         } else {
1491                                 /* allow them to be out of order for old-style tables */
1492                                 /* partition 2 ('c') is special */
1493                                 if (pp->p_offset < current_offset &&
1494                                     seen_default_offset && i != FULL_DISK_PART) {
1495                                         fprintf(stderr,
1496 "Offset %ld for partition %c overlaps previous partition which ends at %ld\n",
1497                                             pp->p_offset,i+'a',current_offset);
1498                                         fprintf(stderr,
1499 "Labels with any *'s for offset must be in ascending order by sector\n");
1500                                         errors++;
1501                                 } else if (pp->p_offset != current_offset &&
1502                                     i != FULL_DISK_PART && seen_default_offset) {
1503                                         /*
1504                                          * this may give unneeded warnings if
1505                                          * partitions are out-of-order
1506                                          */
1507                                         Warning(
1508 "Offset %ld for partition %c doesn't match expected value %ld",
1509                                             pp->p_offset, i + 'a', current_offset);
1510                                 }
1511                         }
1512                         /* partition 2 ('c') is special */
1513                         if (i != FULL_DISK_PART)
1514                                 current_offset = pp->p_offset + pp->p_size;
1515                 }
1516         }
1517
1518         for (i = 0; i < lp->d_npartitions; i++) {
1519                 part = 'a' + i;
1520                 pp = &lp->d_partitions[i];
1521                 if (pp->p_size == 0 && pp->p_offset != 0)
1522                         Warning("partition %c: size 0, but offset %lu",
1523                             part, (u_long)pp->p_offset);
1524 #ifdef notdef
1525                 if (pp->p_size % lp->d_secpercyl)
1526                         Warning("partition %c: size %% cylinder-size != 0",
1527                             part);
1528                 if (pp->p_offset % lp->d_secpercyl)
1529                         Warning("partition %c: offset %% cylinder-size != 0",
1530                             part);
1531 #endif
1532                 if (pp->p_offset > lp->d_secperunit) {
1533                         fprintf(stderr,
1534                             "partition %c: offset past end of unit\n", part);
1535                         errors++;
1536                 }
1537                 if (pp->p_offset + pp->p_size > lp->d_secperunit) {
1538                         fprintf(stderr,
1539                         "partition %c: partition extends past end of unit\n",
1540                             part);
1541                         errors++;
1542                 }
1543                 if (i == FULL_DISK_PART)
1544                 {
1545                         if (pp->p_fstype != FS_UNUSED)
1546                                 Warning("partition %c is not marked as unused!",part);
1547                         if (pp->p_offset != 0)
1548                                 Warning("partition %c doesn't start at 0!",part);
1549                         if (pp->p_size != lp->d_secperunit)
1550                                 Warning("partition %c doesn't cover the whole unit!",part);
1551
1552                         if ((pp->p_fstype != FS_UNUSED) || (pp->p_offset != 0) ||
1553                             (pp->p_size != lp->d_secperunit)) {
1554                                 Warning("An incorrect partition %c may cause problems for "
1555                                     "standard system utilities",part);
1556                         }
1557                 }
1558
1559                 /* check for overlaps */
1560                 /* this will check for all possible overlaps once and only once */
1561                 for (j = 0; j < i; j++) {
1562                         /* partition 2 ('c') is special */
1563                         if (j != FULL_DISK_PART && i != FULL_DISK_PART &&
1564                             part_set[i] && part_set[j]) {
1565                                 pp2 = &lp->d_partitions[j];
1566                                 if (pp2->p_offset < pp->p_offset + pp->p_size &&
1567                                     (pp2->p_offset + pp2->p_size > pp->p_offset ||
1568                                         pp2->p_offset >= pp->p_offset)) {
1569                                         fprintf(stderr,"partitions %c and %c overlap!\n",
1570                                             j + 'a', i + 'a');
1571                                         errors++;
1572                                 }
1573                         }
1574                 }
1575         }
1576         for (; i < MAXPARTITIONS; i++) {
1577                 part = 'a' + i;
1578                 pp = &lp->d_partitions[i];
1579                 if (pp->p_size || pp->p_offset)
1580                         Warning("unused partition %c: size %d offset %lu",
1581                             'a' + i, pp->p_size, (u_long)pp->p_offset);
1582         }
1583         return (errors);
1584 }
1585
1586 /*
1587  * When operating on a "virgin" disk, try getting an initial label
1588  * from the associated device driver.  This might work for all device
1589  * drivers that are able to fetch some initial device parameters
1590  * without even having access to a (BSD) disklabel, like SCSI disks,
1591  * most IDE drives, or vn devices.
1592  *
1593  * The device name must be given in its "canonical" form.
1594  */
1595 struct disklabel *
1596 getvirginlabel(void)
1597 {
1598         static struct disklabel lab;
1599         char namebuf[BBSIZE];
1600         int f;
1601
1602         if (dkname[0] == '/') {
1603                 warnx("\"auto\" requires the usage of a canonical disk name");
1604                 return (NULL);
1605         }
1606         (void)snprintf(namebuf, BBSIZE, "%s%s", _PATH_DEV, dkname);
1607         if ((f = open(namebuf, O_RDONLY)) == -1) {
1608                 warn("cannot open %s", namebuf);
1609                 return (NULL);
1610         }
1611
1612         /*
1613          * Try to use the new get-virgin-label ioctl.  If it fails,
1614          * fallback to the old get-disdk-info ioctl.
1615          */
1616         if (ioctl(f, DIOCGDVIRGIN, &lab) == 0)
1617                 goto out;
1618         if (ioctl(f, DIOCGDINFO, &lab) == 0)
1619                 goto out;
1620         close(f);
1621         (void)snprintf(namebuf, BBSIZE, "%s%s%c", _PATH_DEV, dkname,
1622             'a' + RAW_PART);
1623         if ((f = open(namebuf, O_RDONLY)) == -1) {
1624                 warn("cannot open %s", namebuf);
1625                 return (NULL);
1626         }
1627         if (ioctl(f, DIOCGDINFO, &lab) == 0)
1628                 goto out;
1629         close(f);
1630         warn("No virgin disklabel found %s", namebuf);
1631         return (NULL);
1632     out:
1633         close(f);
1634         lab.d_boot0 = NULL;
1635         lab.d_boot1 = NULL;
1636         return (&lab);
1637 }
1638
1639 /*
1640  * If we are installing a boot program that doesn't fit in d_bbsize
1641  * we need to mark those partitions that the boot overflows into.
1642  * This allows newfs to prevent creation of a filesystem where it might
1643  * clobber bootstrap code.
1644  */
1645 void
1646 setbootflag(lp)
1647         register struct disklabel *lp;
1648 {
1649         register struct partition *pp;
1650         int i, errors = 0;
1651         char part;
1652         u_long boffset;
1653
1654         if (bootbuf == 0)
1655                 return;
1656         boffset = bootsize / lp->d_secsize;
1657         for (i = 0; i < lp->d_npartitions; i++) {
1658                 part = 'a' + i;
1659                 pp = &lp->d_partitions[i];
1660                 if (pp->p_size == 0)
1661                         continue;
1662                 if (boffset <= pp->p_offset) {
1663                         if (pp->p_fstype == FS_BOOT)
1664                                 pp->p_fstype = FS_UNUSED;
1665                 } else if (pp->p_fstype != FS_BOOT) {
1666                         if (pp->p_fstype != FS_UNUSED) {
1667                                 fprintf(stderr,
1668                                         "boot overlaps used partition %c\n",
1669                                         part);
1670                                 errors++;
1671                         } else {
1672                                 pp->p_fstype = FS_BOOT;
1673                                 Warning("boot overlaps partition %c, %s",
1674                                         part, "marked as FS_BOOT");
1675                         }
1676                 }
1677         }
1678         if (errors)
1679                 errx(4, "cannot install boot program");
1680 }
1681
1682 /*VARARGS1*/
1683 void
1684 Warning(char *fmt, ...)
1685 {
1686         va_list ap;
1687
1688         fprintf(stderr, "Warning, ");
1689         va_start(ap, fmt);
1690         vfprintf(stderr, fmt, ap);
1691         fprintf(stderr, "\n");
1692         va_end(ap);
1693 }
1694
1695 void
1696 usage()
1697 {
1698 #if NUMBOOT > 0
1699         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",
1700                 "usage: disklabel [-r] disk",
1701                 "\t\t(to read label)",
1702                 "       disklabel -w [-r] [-n] disk type [ packid ]",
1703                 "\t\t(to write label with existing boot program)",
1704                 "       disklabel -e [-r] [-n] disk",
1705                 "\t\t(to edit label)",
1706                 "       disklabel -R [-r] [-n] disk protofile",
1707                 "\t\t(to restore label with existing boot program)",
1708 #if NUMBOOT > 1
1709                 "       disklabel -B [-n] [ -b boot1 [ -s boot2 ] ] disk [ type ]",
1710                 "\t\t(to install boot program with existing label)",
1711                 "       disklabel -w -B [-n] [ -b boot1 [ -s boot2 ] ] disk type [ packid ]",
1712                 "\t\t(to write label and boot program)",
1713                 "       disklabel -R -B [-n] [ -b boot1 [ -s boot2 ] ] disk protofile [ type ]",
1714                 "\t\t(to restore label and boot program)",
1715 #else
1716                 "       disklabel -B [-n] [ -b bootprog ] disk [ type ]",
1717                 "\t\t(to install boot program with existing on-disk label)",
1718                 "       disklabel -w -B [-n] [ -b bootprog ] disk type [ packid ]",
1719                 "\t\t(to write label and install boot program)",
1720                 "       disklabel -R -B [-n] [ -b bootprog ] disk protofile [ type ]",
1721                 "\t\t(to restore label and install boot program)",
1722 #endif
1723                 "       disklabel [-NW] disk",
1724                 "\t\t(to write disable/enable label)");
1725 #else
1726         fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
1727                 "usage: disklabel [-r] disk", "(to read label)",
1728                 "       disklabel -w [-r] [-n] disk type [ packid ]",
1729                 "\t\t(to write label)",
1730                 "       disklabel -e [-r] [-n] disk",
1731                 "\t\t(to edit label)",
1732                 "       disklabel -R [-r] [-n] disk protofile",
1733                 "\t\t(to restore label)",
1734                 "       disklabel [-NW] disk",
1735                 "\t\t(to write disable/enable label)");
1736 #endif
1737         exit(1);
1738 }