sbin/bsdlabel/bsdlabel.c

   1 /*
   2  * Copyright (c) 1994, 1995 Gordon W. Ross
   3  * Copyright (c) 1994 Theo de Raadt
   4  * All rights reserved.
   5  * Copyright (c) 1987, 1993
   6  *      The Regents of the University of California.  All rights reserved.
   7  *
   8  * This code is derived from software contributed to Berkeley by
   9  * Symmetric Computer Systems.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. All advertising materials mentioning features or use of this software
  20  *    must display the following acknowledgement:
  21  *      This product includes software developed by the University of
  22  *      California, Berkeley and its contributors.
  23  *      This product includes software developed by Theo de Raadt.
  24  * 4. Neither the name of the University nor the names of its contributors
  25  *    may be used to endorse or promote products derived from this software
  26  *    without specific prior written permission.
  27  *
  28  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  29  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  30  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  31  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  32  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  36  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  37  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  38  * SUCH DAMAGE.
  39  *
  40  *      from: $NetBSD: disksubr.c,v 1.13 2000/12/17 22:39:18 pk $
  41  */
  42
  43 #ifndef lint
  44 static const char copyright[] =
  45 "@(#) Copyright (c) 1987, 1993\n\
  46         The Regents of the University of California.  All rights reserved.\n";
  47 #endif /* not lint */
  48
  49 #ifndef lint
  50 #if 0
  51 static char sccsid[] = "@(#)disklabel.c 8.2 (Berkeley) 1/7/94";
  52 /* from static char sccsid[] = "@(#)disklabel.c 1.2 (Symmetric) 11/28/85"; */
  53 #endif
  54 static const char rcsid[] =
  55   "$FreeBSD$";
  56 #endif /* not lint */
  57
  58 #include <sys/param.h>
  59 #include <sys/file.h>
  60 #include <sys/stat.h>
  61 #include <sys/wait.h>
  62 #define DKTYPENAMES
  63 #include <sys/disklabel.h>
  64 #ifdef __sparc64__
  65 #include <sys/sun_disklabel.h>
  66 #endif
  67 #include <unistd.h>
  68 #include <string.h>
  69 #include <stdio.h>
  70 #include <stdlib.h>
  71 #include <signal.h>
  72 #include <stdarg.h>
  73 #include <ctype.h>
  74 #include <err.h>
  75 #include <errno.h>
  76 #include "pathnames.h"
  77
  78 /*
  79  * Disklabel: read and write disklabels.
  80  * The label is usually placed on one of the first sectors of the disk.
  81  * Many machines also place a bootstrap in the same area,
  82  * in which case the label is embedded in the bootstrap.
  83  * The bootstrap source must leave space at the proper offset
  84  * for the label on such machines.
  85  */
  86
  87 #ifndef BBSIZE
  88 #define BBSIZE  8192                    /* size of boot area, with label */
  89 #endif
  90
  91 /* FIX!  These are too low, but are traditional */
  92 #define DEFAULT_NEWFS_BLOCK  8192U
  93 #define DEFAULT_NEWFS_FRAG   1024U
  94 #define DEFAULT_NEWFS_CPG    16U
  95
  96 #define BIG_NEWFS_BLOCK  16384U
  97 #define BIG_NEWFS_FRAG   4096U
  98 #define BIG_NEWFS_CPG    64U
  99
 100 #if defined(__i386__) || defined(__ia64__)
 101 #define NUMBOOT 2
 102 #elif defined(__alpha__) || defined(__sparc64__)
 103 #define NUMBOOT 1
 104 #else
 105 #error  I do not know about this architecture.
 106 #endif
 107
 108 void    makelabel(const char *, const char *, struct disklabel *);
 109 int     writelabel(int, const char *, struct disklabel *);
 110 void    l_perror(const char *);
 111 struct disklabel *readlabel(int);
 112 struct disklabel *makebootarea(char *, struct disklabel *, int);
 113 void    display(FILE *, const struct disklabel *);
 114 int     edit(struct disklabel *, int);
 115 int     editit(void);
 116 char    *skip(char *);
 117 char    *word(char *);
 118 int     getasciilabel(FILE *, struct disklabel *);
 119 int     checklabel(struct disklabel *);
 120 void    setbootflag(struct disklabel *);
 121 void    Warning(const char *, ...) __printflike(1, 2);
 122 void    usage(void);
 123 struct disklabel *getvirginlabel(void);
 124
 125 #define DEFEDITOR       _PATH_VI
 126 #define streq(a,b)      (strcmp(a,b) == 0)
 127
 128 char    *dkname;
 129 char    *specname;
 130 char    tmpfil[] = PATH_TMPFILE;
 131
 132 char    namebuf[BBSIZE], *np = namebuf;
 133 struct  disklabel lab;
 134 char    bootarea[BBSIZE];
 135
 136 #define MAX_PART ('z')
 137 #define MAX_NUM_PARTS (1 + MAX_PART - 'a')
 138 char    part_size_type[MAX_NUM_PARTS];
 139 char    part_offset_type[MAX_NUM_PARTS];
 140 int     part_set[MAX_NUM_PARTS];
 141
 142 #if NUMBOOT > 0
 143 int     installboot;    /* non-zero if we should install a boot program */
 144 char    *bootbuf;       /* pointer to buffer with remainder of boot prog */
 145 int     bootsize;       /* size of remaining boot program */
 146 char    *xxboot;        /* primary boot */
 147 char    *bootxx;        /* secondary boot */
 148 char    boot0[MAXPATHLEN];
 149 char    boot1[MAXPATHLEN];
 150 #endif
 151
 152 enum    {
 153         UNSPEC, EDIT, NOWRITE, READ, RESTORE, WRITE, WRITEABLE, WRITEBOOT
 154 } op = UNSPEC;
 155
 156 int     rflag;
 157 int     disable_write;   /* set to disable writing to disk label */
 158
 159 #define OPTIONS "BNRWb:enrs:w"
 160
 161 int
 162 main(int argc, char *argv[])
 163 {
 164         struct disklabel *lp;
 165         FILE *t;
 166         int ch, f = 0, flag, error = 0;
 167         char *name = 0;
 168
 169         while ((ch = getopt(argc, argv, OPTIONS)) != -1)
 170                 switch (ch) {
 171 #if NUMBOOT > 0
 172                         case 'B':
 173                                 ++installboot;
 174                                 break;
 175                         case 'b':
 176                                 xxboot = optarg;
 177                                 break;
 178 #if NUMBOOT > 1
 179                         case 's':
 180                                 bootxx = optarg;
 181                                 break;
 182 #endif
 183 #endif
 184                         case 'N':
 185                                 if (op != UNSPEC)
 186                                         usage();
 187                                 op = NOWRITE;
 188                                 break;
 189                         case 'n':
 190                                 disable_write = 1;
 191                                 break;
 192                         case 'R':
 193                                 if (op != UNSPEC)
 194                                         usage();
 195                                 op = RESTORE;
 196                                 break;
 197                         case 'W':
 198                                 if (op != UNSPEC)
 199                                         usage();
 200                                 op = WRITEABLE;
 201                                 break;
 202                         case 'e':
 203                                 if (op != UNSPEC)
 204                                         usage();
 205                                 op = EDIT;
 206                                 break;
 207                         case 'r':
 208                                 ++rflag;
 209                                 break;
 210                         case 'w':
 211                                 if (op != UNSPEC)
 212                                         usage();
 213                                 op = WRITE;
 214                                 break;
 215                         case '?':
 216                         default:
 217                                 usage();
 218                 }
 219         argc -= optind;
 220         argv += optind;
 221 #if NUMBOOT > 0
 222         if (installboot) {
 223                 rflag++;
 224                 if (op == UNSPEC)
 225                         op = WRITEBOOT;
 226         } else {
 227                 if (op == UNSPEC)
 228                         op = READ;
 229                 xxboot = bootxx = 0;
 230         }
 231 #else
 232         if (op == UNSPEC)
 233                 op = READ;
 234 #endif
 235         if (argc < 1)
 236                 usage();
 237
 238         dkname = argv[0];
 239         if (dkname[0] != '/') {
 240                 (void)sprintf(np, "%s%s%c", _PATH_DEV, dkname, 'a' + RAW_PART);
 241                 specname = np;
 242                 np += strlen(specname) + 1;
 243         } else
 244                 specname = dkname;
 245         f = open(specname, op == READ ? O_RDONLY : O_RDWR);
 246         if (f < 0 && errno == ENOENT && dkname[0] != '/') {
 247                 (void)sprintf(specname, "%s%s", _PATH_DEV, dkname);
 248                 np = namebuf + strlen(specname) + 1;
 249                 f = open(specname, op == READ ? O_RDONLY : O_RDWR);
 250         }
 251         if (f < 0)
 252                 err(4, "%s", specname);
 253
 254         switch(op) {
 255
 256         case UNSPEC:
 257                 break;
 258
 259         case EDIT:
 260                 if (argc != 1)
 261                         usage();
 262                 lp = readlabel(f);
 263                 error = edit(lp, f);
 264                 break;
 265
 266         case NOWRITE:
 267                 flag = 0;
 268                 if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0)
 269                         err(4, "ioctl DIOCWLABEL");
 270                 break;
 271
 272         case READ:
 273                 if (argc != 1)
 274                         usage();
 275                 lp = readlabel(f);
 276                 display(stdout, lp);
 277                 error = checklabel(lp);
 278                 break;
 279
 280         case RESTORE:
 281 #if NUMBOOT > 0
 282                 if (installboot && argc == 3) {
 283                         makelabel(argv[2], 0, &lab);
 284                         argc--;
 285
 286                         /*
 287                          * We only called makelabel() for its side effect
 288                          * of setting the bootstrap file names.  Discard
 289                          * all changes to `lab' so that all values in the
 290                          * final label come from the ASCII label.
 291                          */
 292                         bzero((char *)&lab, sizeof(lab));
 293                 }
 294 #endif
 295                 if (argc != 2)
 296                         usage();
 297                 if (!(t = fopen(argv[1], "r")))
 298                         err(4, "%s", argv[1]);
 299                 if (!getasciilabel(t, &lab))
 300                         exit(1);
 301                 lp = makebootarea(bootarea, &lab, f);
 302                 *lp = lab;
 303                 error = writelabel(f, bootarea, lp);
 304                 break;
 305
 306         case WRITE:
 307                 if (argc == 3) {
 308                         name = argv[2];
 309                         argc--;
 310                 }
 311                 if (argc != 2)
 312                         usage();
 313                 makelabel(argv[1], name, &lab);
 314                 lp = makebootarea(bootarea, &lab, f);
 315                 *lp = lab;
 316                 if (checklabel(lp) == 0)
 317                         error = writelabel(f, bootarea, lp);
 318                 break;
 319
 320         case WRITEABLE:
 321                 flag = 1;
 322                 if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0)
 323                         err(4, "ioctl DIOCWLABEL");
 324                 break;
 325
 326 #if NUMBOOT > 0
 327         case WRITEBOOT:
 328         {
 329                 struct disklabel tlab;
 330
 331                 lp = readlabel(f);
 332                 tlab = *lp;
 333                 if (argc == 2)
 334                         makelabel(argv[1], 0, &lab);
 335                 lp = makebootarea(bootarea, &lab, f);
 336                 *lp = tlab;
 337                 if (checklabel(lp) == 0)
 338                         error = writelabel(f, bootarea, lp);
 339                 break;
 340         }
 341 #endif
 342         }
 343         exit(error);
 344 }
 345
 346 /*
 347  * Construct a prototype disklabel from /etc/disktab.  As a side
 348  * effect, set the names of the primary and secondary boot files
 349  * if specified.
 350  */
 351 void
 352 makelabel(const char *type, const char *name, struct disklabel *lp)
 353 {
 354         struct disklabel *dp;
 355
 356         if (strcmp(type, "auto") == 0)
 357                 dp = getvirginlabel();
 358         else
 359                 dp = getdiskbyname(type);
 360         if (dp == NULL)
 361                 errx(1, "%s: unknown disk type", type);
 362         *lp = *dp;
 363         bzero(lp->d_packname, sizeof(lp->d_packname));
 364         if (name)
 365                 (void)strncpy(lp->d_packname, name, sizeof(lp->d_packname));
 366 }
 367
 368 int
 369 writelabel(int f, const char *boot, struct disklabel *lp)
 370 {
 371         int flag;
 372 #ifdef __alpha__
 373         u_long *p, sum;
 374         int i;
 375 #endif
 376 #ifdef __sparc64__
 377         struct sun_disklabel *sl;
 378         u_short cksum, *sp1, *sp2;
 379         struct partition *npp;
 380         struct sun_dkpart *spp;
 381         int i, secpercyl;
 382 #endif
 383
 384         if (disable_write) {
 385                 Warning("write to disk label supressed - label was as follows:");
 386                 display(stdout, lp);
 387                 return (0);
 388         } else {
 389                 setbootflag(lp);
 390                 lp->d_magic = DISKMAGIC;
 391                 lp->d_magic2 = DISKMAGIC;
 392                 lp->d_checksum = 0;
 393                 lp->d_checksum = dkcksum(lp);
 394                 if (rflag) {
 395                         /*
 396                          * First set the kernel disk label,
 397                          * then write a label to the raw disk.
 398                          * If the SDINFO ioctl fails because it is unimplemented,
 399                          * keep going; otherwise, the kernel consistency checks
 400                          * may prevent us from changing the current (in-core)
 401                          * label.
 402                          */
 403                         if (ioctl(f, DIOCSDINFO, lp) < 0 &&
 404                                 errno != ENODEV && errno != ENOTTY) {
 405                                 l_perror("ioctl DIOCSDINFO");
 406                                 return (1);
 407                         }
 408                         (void)lseek(f, (off_t)0, SEEK_SET);
 409
 410 #ifdef __alpha__
 411                         /*
 412                          * Generate the bootblock checksum for the SRM console.
 413                          */
 414                         for (p = (u_long *)boot, i = 0, sum = 0; i < 63; i++)
 415                                 sum += p[i];
 416                         p[63] = sum;
 417 #endif
 418 #ifdef __sparc64__
 419                         /*
 420                          * Generate a Sun disklabel around the BSD label for
 421                          * PROM compatability.
 422                          */
 423                         sl = (struct sun_disklabel *)boot;
 424                         memcpy(sl->sl_text, lp->d_packname, sizeof(lp->d_packname));
 425                         sl->sl_rpm = lp->d_rpm;
 426                         sl->sl_pcylinders = lp->d_ncylinders +
 427                             lp->d_acylinders; /* XXX */
 428                         sl->sl_sparespercyl = lp->d_sparespercyl;
 429                         sl->sl_interleave = lp->d_interleave;
 430                         sl->sl_ncylinders = lp->d_ncylinders;
 431                         sl->sl_acylinders = lp->d_acylinders;
 432                         sl->sl_ntracks = lp->d_ntracks;
 433                         sl->sl_nsectors = lp->d_nsectors;
 434                         sl->sl_magic = SUN_DKMAGIC;
 435                         secpercyl = sl->sl_nsectors * sl->sl_ntracks;
 436                         for (i = 0; i < 8; i++) {
 437                                 spp = &sl->sl_part[i];
 438                                 npp = &lp->d_partitions[i];
 439                                 /*
 440                                  * SunOS partitions must start on a cylinder
 441                                  * boundary. Note this restriction is forced
 442                                  * upon FreeBSD/sparc64 labels too, since we
 443                                  * want to keep both labels synchronised.
 444                                  */
 445                                 spp->sdkp_cyloffset = npp->p_offset / secpercyl;
 446                                 spp->sdkp_nsectors = npp->p_size;
 447                         }
 448
 449                         /* Compute the XOR checksum. */
 450                         sp1 = (u_short *)sl;
 451                         sp2 = (u_short *)(sl + 1);
 452                         sl->sl_cksum = cksum = 0;
 453                         while (sp1 < sp2)
 454                                 cksum ^= *sp1++;
 455                         sl->sl_cksum = cksum;
 456 #endif
 457                         /*
 458                          * write enable label sector before write (if necessary),
 459                          * disable after writing.
 460                          */
 461                         flag = 1;
 462                         if (ioctl(f, DIOCWLABEL, &flag) < 0)
 463                                 warn("ioctl DIOCWLABEL");
 464                         if (write(f, boot, lp->d_bbsize) != lp->d_bbsize) {
 465                                 warn("write");
 466                                 return (1);
 467                         }
 468 #if NUMBOOT > 0
 469                         /*
 470                          * Output the remainder of the disklabel
 471                          */
 472                         if (bootbuf && write(f, bootbuf, bootsize) != bootsize) {
 473                                 warn("write");
 474                                 return(1);
 475                         }
 476 #endif
 477                         flag = 0;
 478                         (void) ioctl(f, DIOCWLABEL, &flag);
 479                 } else if (ioctl(f, DIOCWDINFO, lp) < 0) {
 480                         l_perror("ioctl DIOCWDINFO");
 481                         return (1);
 482                 }
 483         }
 484         return (0);
 485 }
 486
 487 void
 488 l_perror(const char *s)
 489 {
 490         switch (errno) {
 491
 492         case ESRCH:
 493                 warnx("%s: no disk label on disk;", s);
 494                 fprintf(stderr, "add \"-r\" to install initial label\n");
 495                 break;
 496
 497         case EINVAL:
 498                 warnx("%s: label magic number or checksum is wrong!", s);
 499                 fprintf(stderr, "(disklabel or kernel is out of date?)\n");
 500                 break;
 501
 502         case EBUSY:
 503                 warnx("%s: open partition would move or shrink", s);
 504                 break;
 505
 506         case EXDEV:
 507                 warnx("%s: '%c' partition must start at beginning of disk",
 508                     s, 'a' + RAW_PART);
 509                 break;
 510
 511         default:
 512                 warn((char *)NULL);
 513                 break;
 514         }
 515 }
 516
 517 /*
 518  * Fetch disklabel for disk.
 519  * Use ioctl to get label unless -r flag is given.
 520  */
 521 struct disklabel *
 522 readlabel(int f)
 523 {
 524         struct disklabel *lp;
 525
 526         if (rflag) {
 527                 if (read(f, bootarea, BBSIZE) < BBSIZE)
 528                         err(4, "%s", specname);
 529                 for (lp = (struct disklabel *)bootarea;
 530                     lp <= (struct disklabel *)(bootarea + BBSIZE - sizeof(*lp));
 531                     lp = (struct disklabel *)((char *)lp + 16))
 532                         if (lp->d_magic == DISKMAGIC &&
 533                             lp->d_magic2 == DISKMAGIC)
 534                                 break;
 535                 if (lp > (struct disklabel *)(bootarea+BBSIZE-sizeof(*lp)) ||
 536                     lp->d_magic != DISKMAGIC || lp->d_magic2 != DISKMAGIC ||
 537                     dkcksum(lp) != 0)
 538                         errx(1,
 539             "bad pack magic number (label is damaged, or pack is unlabeled)");
 540         } else {
 541                 lp = &lab;
 542                 if (ioctl(f, DIOCGDINFO, lp) < 0)
 543                         err(4, "ioctl DIOCGDINFO");
 544         }
 545         return (lp);
 546 }
 547
 548 /*
 549  * Construct a bootarea (d_bbsize bytes) in the specified buffer ``boot''
 550  * Returns a pointer to the disklabel portion of the bootarea.
 551  */
 552 struct disklabel *
 553 makebootarea(char *boot, struct disklabel *dp, int f)
 554 {
 555         struct disklabel *lp;
 556         char *p;
 557         int b;
 558 #if NUMBOOT > 0
 559         char *dkbasename;
 560         struct stat sb;
 561 #endif
 562 #ifdef __alpha__
 563         u_long *bootinfo;
 564         int n;
 565 #endif
 566 #ifdef __i386__
 567         char *tmpbuf;
 568         int i, found;
 569 #endif
 570
 571         /* XXX */
 572         if (dp->d_secsize == 0) {
 573                 dp->d_secsize = DEV_BSIZE;
 574                 dp->d_bbsize = BBSIZE;
 575         }
 576         lp = (struct disklabel *)
 577                 (boot + (LABELSECTOR * dp->d_secsize) + LABELOFFSET);
 578         bzero((char *)lp, sizeof *lp);
 579 #if NUMBOOT > 0
 580         /*
 581          * If we are not installing a boot program but we are installing a
 582          * label on disk then we must read the current bootarea so we don't
 583          * clobber the existing boot.
 584          */
 585         if (!installboot) {
 586                 if (rflag) {
 587                         if (read(f, boot, BBSIZE) < BBSIZE)
 588                                 err(4, "%s", specname);
 589                         bzero((char *)lp, sizeof *lp);
 590                 }
 591                 return (lp);
 592         }
 593         /*
 594          * We are installing a boot program.  Determine the name(s) and
 595          * read them into the appropriate places in the boot area.
 596          */
 597         if (!xxboot || !bootxx) {
 598                 dkbasename = np;
 599                 if ((p = rindex(dkname, '/')) == NULL)
 600                         p = dkname;
 601                 else
 602                         p++;
 603                 while (*p && !isdigit(*p))
 604                         *np++ = *p++;
 605                 *np++ = '\0';
 606
 607                 if (!xxboot) {
 608                         (void)sprintf(boot0, "%s/boot1", _PATH_BOOTDIR);
 609                         xxboot = boot0;
 610                 }
 611 #if NUMBOOT > 1
 612                 if (!bootxx) {
 613                         (void)sprintf(boot1, "%s/boot2", _PATH_BOOTDIR);
 614                         bootxx = boot1;
 615                 }
 616 #endif
 617         }
 618
 619         /*
 620          * Strange rules:
 621          * 1. One-piece bootstrap (hp300/hp800)
 622          * 1. One-piece bootstrap (alpha/sparc64)
 623          *      up to d_bbsize bytes of ``xxboot'' go in bootarea, the rest
 624          *      is remembered and written later following the bootarea.
 625          * 2. Two-piece bootstraps (i386/ia64)
 626          *      up to d_secsize bytes of ``xxboot'' go in first d_secsize
 627          *      bytes of bootarea, remaining d_bbsize-d_secsize filled
 628          *      from ``bootxx''.
 629          */
 630         b = open(xxboot, O_RDONLY);
 631         if (b < 0)
 632                 err(4, "%s", xxboot);
 633 #if NUMBOOT > 1
 634 #ifdef __i386__
 635         /*
 636          * XXX Botch alert.
 637          * The i386 has the so-called fdisk table embedded into the
 638          * primary bootstrap.  We take care to not clobber it, but
 639          * only if it does already contain some data.  (Otherwise,
 640          * the xxboot provides a template.)
 641          */
 642         if ((tmpbuf = (char *)malloc((int)dp->d_secsize)) == 0)
 643                 err(4, "%s", xxboot);
 644         memcpy((void *)tmpbuf, (void *)boot, (int)dp->d_secsize);
 645 #endif /* i386 */
 646         if (read(b, boot, (int)dp->d_secsize) < 0)
 647                 err(4, "%s", xxboot);
 648         (void)close(b);
 649 #ifdef __i386__
 650         for (i = DOSPARTOFF, found = 0;
 651              !found && i < DOSPARTOFF + NDOSPART*sizeof(struct dos_partition);
 652              i++)
 653                 found = tmpbuf[i] != 0;
 654         if (found)
 655                 memcpy((void *)&boot[DOSPARTOFF],
 656                        (void *)&tmpbuf[DOSPARTOFF],
 657                        NDOSPART * sizeof(struct dos_partition));
 658         free(tmpbuf);
 659 #endif /* i386 */
 660         b = open(bootxx, O_RDONLY);
 661         if (b < 0)
 662                 err(4, "%s", bootxx);
 663         if (fstat(b, &sb) != 0)
 664                 err(4, "%s", bootxx);
 665         if (dp->d_secsize + sb.st_size > dp->d_bbsize)
 666                 errx(4, "%s too large", bootxx);
 667         if (read(b, &boot[dp->d_secsize],
 668                  (int)(dp->d_bbsize-dp->d_secsize)) < 0)
 669                 err(4, "%s", bootxx);
 670 #else /* !(NUMBOOT > 1) */
 671 #ifdef __alpha__
 672         /*
 673          * On the alpha, the primary bootstrap starts at the
 674          * second sector of the boot area.  The first sector
 675          * contains the label and must be edited to contain the
 676          * size and location of the primary bootstrap.
 677          */
 678         n = read(b, boot + dp->d_secsize, (int)dp->d_bbsize);
 679         if (n < 0)
 680                 err(4, "%s", xxboot);
 681         bootinfo = (u_long *)(boot + 480);
 682         bootinfo[0] = (n + dp->d_secsize - 1) / dp->d_secsize;
 683         bootinfo[1] = 1;        /* start at sector 1 */
 684         bootinfo[2] = 0;        /* flags (must be zero) */
 685 #else /* !__alpha__ */
 686         if (read(b, boot, (int)dp->d_bbsize) < 0)
 687                 err(4, "%s", xxboot);
 688 #endif /* __alpha__ */
 689         if (fstat(b, &sb) != 0)
 690                 err(4, "%s", xxboot);
 691         bootsize = (int)sb.st_size - dp->d_bbsize;
 692         if (bootsize > 0) {
 693                 /* XXX assume d_secsize is a power of two */
 694                 bootsize = (bootsize + dp->d_secsize-1) & ~(dp->d_secsize-1);
 695                 bootbuf = (char *)malloc((size_t)bootsize);
 696                 if (bootbuf == 0)
 697                         err(4, "%s", xxboot);
 698                 if (read(b, bootbuf, bootsize) < 0) {
 699                         free(bootbuf);
 700                         err(4, "%s", xxboot);
 701                 }
 702         }
 703 #endif /* NUMBOOT > 1 */
 704         (void)close(b);
 705 #endif /* NUMBOOT > 0 */
 706         /*
 707          * Make sure no part of the bootstrap is written in the area
 708          * reserved for the label.
 709          */
 710         for (p = (char *)lp; p < (char *)lp + sizeof(struct disklabel); p++)
 711                 if (*p)
 712                         errx(2, "bootstrap doesn't leave room for disk label");
 713         return (lp);
 714 }
 715
 716 void
 717 display(FILE *f, const struct disklabel *lp)
 718 {
 719         int i, j;
 720         const struct partition *pp;
 721
 722         fprintf(f, "# %s:\n", specname);
 723         if ((unsigned) lp->d_type < DKMAXTYPES)
 724                 fprintf(f, "type: %s\n", dktypenames[lp->d_type]);
 725         else
 726                 fprintf(f, "type: %u\n", lp->d_type);
 727         fprintf(f, "disk: %.*s\n", (int)sizeof(lp->d_typename),
 728                 lp->d_typename);
 729         fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname),
 730                 lp->d_packname);
 731         fprintf(f, "flags:");
 732         if (lp->d_flags & D_REMOVABLE)
 733                 fprintf(f, " removeable");
 734         if (lp->d_flags & D_ECC)
 735                 fprintf(f, " ecc");
 736         if (lp->d_flags & D_BADSECT)
 737                 fprintf(f, " badsect");
 738         fprintf(f, "\n");
 739         fprintf(f, "bytes/sector: %lu\n", (u_long)lp->d_secsize);
 740         fprintf(f, "sectors/track: %lu\n", (u_long)lp->d_nsectors);
 741         fprintf(f, "tracks/cylinder: %lu\n", (u_long)lp->d_ntracks);
 742         fprintf(f, "sectors/cylinder: %lu\n", (u_long)lp->d_secpercyl);
 743         fprintf(f, "cylinders: %lu\n", (u_long)lp->d_ncylinders);
 744         fprintf(f, "sectors/unit: %lu\n", (u_long)lp->d_secperunit);
 745         fprintf(f, "rpm: %u\n", lp->d_rpm);
 746         fprintf(f, "interleave: %u\n", lp->d_interleave);
 747         fprintf(f, "trackskew: %u\n", lp->d_trackskew);
 748         fprintf(f, "cylinderskew: %u\n", lp->d_cylskew);
 749         fprintf(f, "headswitch: %lu\t\t# milliseconds\n",
 750             (u_long)lp->d_headswitch);
 751         fprintf(f, "track-to-track seek: %ld\t# milliseconds\n",
 752             (u_long)lp->d_trkseek);
 753         fprintf(f, "drivedata: ");
 754         for (i = NDDATA - 1; i >= 0; i--)
 755                 if (lp->d_drivedata[i])
 756                         break;
 757         if (i < 0)
 758                 i = 0;
 759         for (j = 0; j <= i; j++)
 760                 fprintf(f, "%lu ", (u_long)lp->d_drivedata[j]);
 761         fprintf(f, "\n\n%u partitions:\n", lp->d_npartitions);
 762         fprintf(f,
 763             "#        size   offset    fstype   [fsize bsize bps/cpg]\n");
 764         pp = lp->d_partitions;
 765         for (i = 0; i < lp->d_npartitions; i++, pp++) {
 766                 if (pp->p_size) {
 767                         fprintf(f, "  %c: %8lu %8lu  ", 'a' + i,
 768                            (u_long)pp->p_size, (u_long)pp->p_offset);
 769                         if ((unsigned) pp->p_fstype < FSMAXTYPES)
 770                                 fprintf(f, "%8.8s", fstypenames[pp->p_fstype]);
 771                         else
 772                                 fprintf(f, "%8d", pp->p_fstype);
 773                         switch (pp->p_fstype) {
 774
 775                         case FS_UNUSED:                         /* XXX */
 776                                 fprintf(f, "    %5lu %5lu %5.5s ",
 777                                     (u_long)pp->p_fsize,
 778                                     (u_long)(pp->p_fsize * pp->p_frag), "");
 779                                 break;
 780
 781                         case FS_BSDFFS:
 782                                 fprintf(f, "    %5lu %5lu %5u ",
 783                                     (u_long)pp->p_fsize,
 784                                     (u_long)(pp->p_fsize * pp->p_frag),
 785                                     pp->p_cpg);
 786                                 break;
 787
 788                         case FS_BSDLFS:
 789                                 fprintf(f, "    %5lu %5lu %5d",
 790                                     (u_long)pp->p_fsize,
 791                                     (u_long)(pp->p_fsize * pp->p_frag),
 792                                     pp->p_cpg);
 793                                 break;
 794
 795                         default:
 796                                 fprintf(f, "%20.20s", "");
 797                                 break;
 798                         }
 799                         fprintf(f, "\t# (Cyl. %4lu",
 800                             (u_long)(pp->p_offset / lp->d_secpercyl));
 801                         if (pp->p_offset % lp->d_secpercyl)
 802                             putc('*', f);
 803                         else
 804                             putc(' ', f);
 805                         fprintf(f, "- %lu",
 806                             (u_long)((pp->p_offset + pp->p_size +
 807                             lp->d_secpercyl - 1) /
 808                             lp->d_secpercyl - 1));
 809                         if (pp->p_size % lp->d_secpercyl)
 810                             putc('*', f);
 811                         fprintf(f, ")\n");
 812                 }
 813         }
 814         fflush(f);
 815 }
 816
 817 int
 818 edit(struct disklabel *lp, int f)
 819 {
 820         int c, fd;
 821         struct disklabel label;
 822         FILE *fp;
 823
 824         if ((fd = mkstemp(tmpfil)) == -1 ||
 825             (fp = fdopen(fd, "w")) == NULL) {
 826                 warnx("can't create %s", tmpfil);
 827                 return (1);
 828         }
 829         display(fp, lp);
 830         fclose(fp);
 831         for (;;) {
 832                 if (!editit())
 833                         break;
 834                 fp = fopen(tmpfil, "r");
 835                 if (fp == NULL) {
 836                         warnx("can't reopen %s for reading", tmpfil);
 837                         break;
 838                 }
 839                 bzero((char *)&label, sizeof(label));
 840                 if (getasciilabel(fp, &label)) {
 841                         *lp = label;
 842                         if (writelabel(f, bootarea, lp) == 0) {
 843                                 fclose(fp);
 844                                 (void) unlink(tmpfil);
 845                                 return (0);
 846                         }
 847                 }
 848                 fclose(fp);
 849                 printf("re-edit the label? [y]: "); fflush(stdout);
 850                 c = getchar();
 851                 if (c != EOF && c != (int)'\n')
 852                         while (getchar() != (int)'\n')
 853                                 ;
 854                 if  (c == (int)'n')
 855                         break;
 856         }
 857         (void) unlink(tmpfil);
 858         return (1);
 859 }
 860
 861 int
 862 editit(void)
 863 {
 864         int pid, xpid;
 865         int stat, omask;
 866         char *ed;
 867
 868         omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP));
 869         while ((pid = fork()) < 0) {
 870                 if (errno == EPROCLIM) {
 871                         warnx("you have too many processes");
 872                         return(0);
 873                 }
 874                 if (errno != EAGAIN) {
 875                         warn("fork");
 876                         return(0);
 877                 }
 878                 sleep(1);
 879         }
 880         if (pid == 0) {
 881                 sigsetmask(omask);
 882                 setgid(getgid());
 883                 setuid(getuid());
 884                 if ((ed = getenv("EDITOR")) == (char *)0)
 885                         ed = DEFEDITOR;
 886                 execlp(ed, ed, tmpfil, (char *)0);
 887                 err(1, "%s", ed);
 888         }
 889         while ((xpid = wait(&stat)) >= 0)
 890                 if (xpid == pid)
 891                         break;
 892         sigsetmask(omask);
 893         return(!stat);
 894 }
 895
 896 char *
 897 skip(char *cp)
 898 {
 899
 900         while (*cp != '\0' && isspace(*cp))
 901                 cp++;
 902         if (*cp == '\0' || *cp == '#')
 903                 return (NULL);
 904         return (cp);
 905 }
 906
 907 char *
 908 word(char *cp)
 909 {
 910         char c;
 911
 912         while (*cp != '\0' && !isspace(*cp) && *cp != '#')
 913                 cp++;
 914         if ((c = *cp) != '\0') {
 915                 *cp++ = '\0';
 916                 if (c != '#')
 917                         return (skip(cp));
 918         }
 919         return (NULL);
 920 }
 921
 922 /*
 923  * Read an ascii label in from fd f,
 924  * in the same format as that put out by display(),
 925  * and fill in lp.
 926  */
 927 int
 928 getasciilabel(FILE *f, struct disklabel *lp)
 929 {
 930         char *cp;
 931         const char **cpp;
 932         struct partition *pp;
 933         unsigned int part;
 934         char *tp, line[BUFSIZ];
 935         int v, lineno = 0, errors = 0;
 936         int i;
 937
 938         lp->d_bbsize = BBSIZE;                          /* XXX */
 939         lp->d_sbsize = 0;                               /* XXX */
 940         while (fgets(line, sizeof(line) - 1, f)) {
 941                 lineno++;
 942                 if ((cp = index(line,'\n')) != 0)
 943                         *cp = '\0';
 944                 cp = skip(line);
 945                 if (cp == NULL)
 946                         continue;
 947                 tp = index(cp, ':');
 948                 if (tp == NULL) {
 949                         fprintf(stderr, "line %d: syntax error\n", lineno);
 950                         errors++;
 951                         continue;
 952                 }
 953                 *tp++ = '\0', tp = skip(tp);
 954                 if (streq(cp, "type")) {
 955                         if (tp == NULL)
 956                                 tp = "unknown";
 957                         cpp = dktypenames;
 958                         for (; cpp < &dktypenames[DKMAXTYPES]; cpp++)
 959                                 if (*cpp && streq(*cpp, tp)) {
 960                                         lp->d_type = cpp - dktypenames;
 961                                         goto next;
 962                                 }
 963                         v = atoi(tp);
 964                         if ((unsigned)v >= DKMAXTYPES)
 965                                 fprintf(stderr, "line %d:%s %d\n", lineno,
 966                                     "Warning, unknown disk type", v);
 967                         lp->d_type = v;
 968                         continue;
 969                 }
 970                 if (streq(cp, "flags")) {
 971                         for (v = 0; (cp = tp) && *cp != '\0';) {
 972                                 tp = word(cp);
 973                                 if (streq(cp, "removeable"))
 974                                         v |= D_REMOVABLE;
 975                                 else if (streq(cp, "ecc"))
 976                                         v |= D_ECC;
 977                                 else if (streq(cp, "badsect"))
 978                                         v |= D_BADSECT;
 979                                 else {
 980                                         fprintf(stderr,
 981                                             "line %d: %s: bad flag\n",
 982                                             lineno, cp);
 983                                         errors++;
 984                                 }
 985                         }
 986                         lp->d_flags = v;
 987                         continue;
 988                 }
 989                 if (streq(cp, "drivedata")) {
 990                         for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA;) {
 991                                 lp->d_drivedata[i++] = atoi(cp);
 992                                 tp = word(cp);
 993                         }
 994                         continue;
 995                 }
 996                 if (sscanf(cp, "%d partitions", &v) == 1) {
 997                         if (v == 0 || (unsigned)v > MAXPARTITIONS) {
 998                                 fprintf(stderr,
 999                                     "line %d: bad # of partitions\n", lineno);
1000                                 lp->d_npartitions = MAXPARTITIONS;
1001                                 errors++;
1002                         } else
1003                                 lp->d_npartitions = v;
1004                         continue;
1005                 }
1006                 if (tp == NULL)
1007                         tp = "";
1008                 if (streq(cp, "disk")) {
1009                         strncpy(lp->d_typename, tp, sizeof (lp->d_typename));
1010                         continue;
1011                 }
1012                 if (streq(cp, "label")) {
1013                         strncpy(lp->d_packname, tp, sizeof (lp->d_packname));
1014                         continue;
1015                 }
1016                 if (streq(cp, "bytes/sector")) {
1017                         v = atoi(tp);
1018                         if (v <= 0 || (v % DEV_BSIZE) != 0) {
1019                                 fprintf(stderr,
1020                                     "line %d: %s: bad sector size\n",
1021                                     lineno, tp);
1022                                 errors++;
1023                         } else
1024                                 lp->d_secsize = v;
1025                         continue;
1026                 }
1027                 if (streq(cp, "sectors/track")) {
1028                         v = atoi(tp);
1029                         if (v <= 0) {
1030                                 fprintf(stderr, "line %d: %s: bad %s\n",
1031                                     lineno, tp, cp);
1032                                 errors++;
1033                         } else
1034                                 lp->d_nsectors = v;
1035                         continue;
1036                 }
1037                 if (streq(cp, "sectors/cylinder")) {
1038                         v = atoi(tp);
1039                         if (v <= 0) {
1040                                 fprintf(stderr, "line %d: %s: bad %s\n",
1041                                     lineno, tp, cp);
1042                                 errors++;
1043                         } else
1044                                 lp->d_secpercyl = v;
1045                         continue;
1046                 }
1047                 if (streq(cp, "tracks/cylinder")) {
1048                         v = atoi(tp);
1049                         if (v <= 0) {
1050                                 fprintf(stderr, "line %d: %s: bad %s\n",
1051                                     lineno, tp, cp);
1052                                 errors++;
1053                         } else
1054                                 lp->d_ntracks = v;
1055                         continue;
1056                 }
1057                 if (streq(cp, "cylinders")) {
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_ncylinders = v;
1065                         continue;
1066                 }
1067                 if (streq(cp, "sectors/unit")) {
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_secperunit = v;
1075                         continue;
1076                 }
1077                 if (streq(cp, "rpm")) {
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_rpm = v;
1085                         continue;
1086                 }
1087                 if (streq(cp, "interleave")) {
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_interleave = v;
1095                         continue;
1096                 }
1097                 if (streq(cp, "trackskew")) {
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_trackskew = v;
1105                         continue;
1106                 }
1107                 if (streq(cp, "cylinderskew")) {
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_cylskew = v;
1115                         continue;
1116                 }
1117                 if (streq(cp, "headswitch")) {
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_headswitch = v;
1125                         continue;
1126                 }
1127                 if (streq(cp, "track-to-track seek")) {
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_trkseek = v;
1135                         continue;
1136                 }
1137                 /* the ':' was removed above */
1138                 if ('a' <= *cp && *cp <= MAX_PART && cp[1] == '\0') {
1139                         part = *cp - 'a';
1140                         if (part >= lp->d_npartitions) {
1141                                 fprintf(stderr,
1142                                     "line %d: partition name out of range a-%c: %s\n",
1143                                     lineno, 'a' + lp->d_npartitions - 1, cp);
1144                                 errors++;
1145                                 continue;
1146                         }
1147                         pp = &lp->d_partitions[part];
1148                         part_set[part] = 1;
1149 #define NXTNUM(n) { \
1150         if (tp == NULL) { \
1151                 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \
1152                 errors++; \
1153                 break; \
1154         } else { \
1155                 cp = tp, tp = word(cp); \
1156                 if (tp == NULL) \
1157                         tp = cp; \
1158                 (n) = atoi(cp); \
1159         } \
1160      }
1161 /* retain 1 character following number */
1162 #define NXTWORD(w,n) { \
1163         if (tp == NULL) { \
1164                 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \
1165                 errors++; \
1166                 break; \
1167         } else { \
1168                 char *tmp; \
1169                 cp = tp, tp = word(cp); \
1170                 if (tp == NULL) \
1171                         tp = cp; \
1172                 (n) = strtol(cp,&tmp,10); \
1173                 if (tmp) (w) = *tmp; \
1174         } \
1175      }
1176                         v = 0;
1177                         NXTWORD(part_size_type[part],v);
1178                         if (v < 0 || (v == 0 && part_size_type[part] != '*')) {
1179                                 fprintf(stderr,
1180                                     "line %d: %s: bad partition size\n",
1181                                     lineno, cp);
1182                                 errors++;
1183                                 break;
1184                         } else {
1185                                 pp->p_size = v;
1186
1187                                 v = 0;
1188                                 NXTWORD(part_offset_type[part],v);
1189                                 if (v < 0 || (v == 0 &&
1190                                     part_offset_type[part] != '*' &&
1191                                     part_offset_type[part] != '\0')) {
1192                                         fprintf(stderr,
1193                                             "line %d: %s: bad partition offset\n",
1194                                             lineno, cp);
1195                                         errors++;
1196                                         break;
1197                                 } else {
1198                                         pp->p_offset = v;
1199                                         cp = tp, tp = word(cp);
1200                                         cpp = fstypenames;
1201                                         for (; cpp < &fstypenames[FSMAXTYPES]; cpp++)
1202                                                 if (*cpp && streq(*cpp, cp)) {
1203                                                         pp->p_fstype = cpp -
1204                                                             fstypenames;
1205                                                         goto gottype;
1206                                                 }
1207                                         if (isdigit(*cp))
1208                                                 v = atoi(cp);
1209                                         else
1210                                                 v = FSMAXTYPES;
1211                                         if ((unsigned)v >= FSMAXTYPES) {
1212                                                 fprintf(stderr,
1213                                                     "line %d: Warning, unknown "
1214                                                     "filesystem type %s\n",
1215                                                     lineno, cp);
1216                                                 v = FS_UNUSED;
1217                                         }
1218                                         pp->p_fstype = v;
1219                                 gottype:;
1220                                         /*
1221                                          * Note: NXTNUM will break us out of the
1222                                          * switch only!
1223                                          */
1224                                         switch (pp->p_fstype) {
1225                                         case FS_UNUSED:
1226                                                 /*
1227                                                  * allow us to accept defaults for
1228                                                  * fsize/frag/cpg
1229                                                  */
1230                                                 if (tp) {
1231                                                         NXTNUM(pp->p_fsize);
1232                                                         if (pp->p_fsize == 0)
1233                                                                 break;
1234                                                         NXTNUM(v);
1235                                                         pp->p_frag = v / pp->p_fsize;
1236                                                 }
1237                                                 /* else default to 0's */
1238                                                 break;
1239
1240                                         /* These happen to be the same */
1241                                         case FS_BSDFFS:
1242                                         case FS_BSDLFS:
1243                                                 if (tp) {
1244                                                         NXTNUM(pp->p_fsize);
1245                                                         if (pp->p_fsize == 0)
1246                                                                 break;
1247                                                         NXTNUM(v);
1248                                                         pp->p_frag = v / pp->p_fsize;
1249                                                         NXTNUM(pp->p_cpg);
1250                                                 } else {
1251                                                         /*
1252                                                          * FIX! poor attempt at
1253                                                          * adaptive
1254                                                          */
1255                                                         /* 1 GB */
1256                                                         if (pp->p_size < 1*1024*1024*1024/lp->d_secsize) {
1257 /* FIX!  These are too low, but are traditional */
1258                                                                 pp->p_fsize = DEFAULT_NEWFS_BLOCK;
1259                                                                 pp->p_frag  = (unsigned char) DEFAULT_NEWFS_FRAG;
1260                                                                 pp->p_cpg   = DEFAULT_NEWFS_CPG;
1261                                                         } else {
1262                                                                 pp->p_fsize = BIG_NEWFS_BLOCK;
1263                                                                 pp->p_frag  = (unsigned char) BIG_NEWFS_FRAG;
1264                                                                 pp->p_cpg   = BIG_NEWFS_CPG;
1265                                                         }
1266                                                 }
1267                                                 break;
1268                                         default:
1269                                                 break;
1270                                         }
1271
1272                                         /*
1273                                          * note: we may not have
1274                                          * gotten all the entries for
1275                                          * the fs though if we didn't,
1276                                          * errors will be set.
1277                                          */
1278                                 }
1279                         }
1280                         continue;
1281                 }
1282                 fprintf(stderr, "line %d: %s: Unknown disklabel field\n",
1283                     lineno, cp);
1284                 errors++;
1285         next:;
1286         }
1287         errors += checklabel(lp);
1288         return (errors == 0);
1289 }
1290
1291 /*
1292  * Check disklabel for errors and fill in
1293  * derived fields according to supplied values.
1294  */
1295 int
1296 checklabel(struct disklabel *lp)
1297 {
1298         struct partition *pp;
1299         int i, errors = 0;
1300         char part;
1301         unsigned long total_size, total_percent, current_offset;
1302         int seen_default_offset;
1303         int hog_part;
1304         int j;
1305         struct partition *pp2;
1306
1307         if (lp->d_secsize == 0) {
1308                 fprintf(stderr, "sector size 0\n");
1309                 return (1);
1310         }
1311         if (lp->d_nsectors == 0) {
1312                 fprintf(stderr, "sectors/track 0\n");
1313                 return (1);
1314         }
1315         if (lp->d_ntracks == 0) {
1316                 fprintf(stderr, "tracks/cylinder 0\n");
1317                 return (1);
1318         }
1319         if  (lp->d_ncylinders == 0) {
1320                 fprintf(stderr, "cylinders/unit 0\n");
1321                 errors++;
1322         }
1323         if (lp->d_rpm == 0)
1324                 Warning("revolutions/minute 0");
1325         if (lp->d_secpercyl == 0)
1326                 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks;
1327         if (lp->d_secperunit == 0)
1328                 lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders;
1329         if (lp->d_bbsize == 0) {
1330                 fprintf(stderr, "boot block size 0\n");
1331                 errors++;
1332         } else if (lp->d_bbsize % lp->d_secsize)
1333                 Warning("boot block size %% sector-size != 0");
1334         if (lp->d_npartitions > MAXPARTITIONS)
1335                 Warning("number of partitions (%lu) > MAXPARTITIONS (%d)",
1336                     (u_long)lp->d_npartitions, MAXPARTITIONS);
1337
1338         /* first allocate space to the partitions, then offsets */
1339         total_size = 0; /* in sectors */
1340         total_percent = 0; /* in percent */
1341         hog_part = -1;
1342         /* find all fixed partitions */
1343         for (i = 0; i < lp->d_npartitions; i++) {
1344                 pp = &lp->d_partitions[i];
1345                 if (part_set[i]) {
1346                         if (part_size_type[i] == '*') {
1347                                 if (i == RAW_PART) {
1348                                         pp->p_size = lp->d_secperunit;
1349                                 } else {
1350                                         if (hog_part != -1)
1351                                                 Warning("Too many '*' partitions (%c and %c)",
1352                                                     hog_part + 'a',i + 'a');
1353                                         else
1354                                                 hog_part = i;
1355                                 }
1356                         } else {
1357                                 off_t size;
1358
1359                                 size = pp->p_size;
1360                                 switch (part_size_type[i]) {
1361                                 case '%':
1362                                         total_percent += size;
1363                                         break;
1364                                 case 'k':
1365                                 case 'K':
1366                                         size *= 1024ULL;
1367                                         break;
1368                                 case 'm':
1369                                 case 'M':
1370                                         size *= 1024ULL * 1024ULL;
1371                                         break;
1372                                 case 'g':
1373                                 case 'G':
1374                                         size *= 1024ULL * 1024ULL * 1024ULL;
1375                                         break;
1376                                 case '\0':
1377                                         break;
1378                                 default:
1379                                         Warning("unknown size specifier '%c' (K/M/G are valid)",part_size_type[i]);
1380                                         break;
1381                                 }
1382                                 /* don't count %'s yet */
1383                                 if (part_size_type[i] != '%') {
1384                                         /*
1385                                          * for all not in sectors, convert to
1386                                          * sectors
1387                                          */
1388                                         if (part_size_type[i] != '\0') {
1389                                                 if (size % lp->d_secsize != 0)
1390                                                         Warning("partition %c not an integer number of sectors",
1391                                                             i + 'a');
1392                                                 size /= lp->d_secsize;
1393                                                 pp->p_size = size;
1394                                         }
1395                                         /* else already in sectors */
1396                                         if (i != RAW_PART)
1397                                                 total_size += size;
1398                                 }
1399                         }
1400                 }
1401         }
1402         /* handle % partitions - note %'s don't need to add up to 100! */
1403         if (total_percent != 0) {
1404                 long free_space = lp->d_secperunit - total_size;
1405                 if (total_percent > 100) {
1406                         fprintf(stderr,"total percentage %lu is greater than 100\n",
1407                             total_percent);
1408                         errors++;
1409                 }
1410
1411                 if (free_space > 0) {
1412                         for (i = 0; i < lp->d_npartitions; i++) {
1413                                 pp = &lp->d_partitions[i];
1414                                 if (part_set[i] && part_size_type[i] == '%') {
1415                                         /* careful of overflows! and integer roundoff */
1416                                         pp->p_size = ((double)pp->p_size/100) * free_space;
1417                                         total_size += pp->p_size;
1418
1419                                         /* FIX we can lose a sector or so due to roundoff per
1420                                            partition.  A more complex algorithm could avoid that */
1421                                 }
1422                         }
1423                 } else {
1424                         fprintf(stderr,
1425                             "%ld sectors available to give to '*' and '%%' partitions\n",
1426                             free_space);
1427                         errors++;
1428                         /* fix?  set all % partitions to size 0? */
1429                 }
1430         }
1431         /* give anything remaining to the hog partition */
1432         if (hog_part != -1) {
1433                 lp->d_partitions[hog_part].p_size = lp->d_secperunit - total_size;
1434                 total_size = lp->d_secperunit;
1435         }
1436
1437         /* Now set the offsets for each partition */
1438         current_offset = 0; /* in sectors */
1439         seen_default_offset = 0;
1440         for (i = 0; i < lp->d_npartitions; i++) {
1441                 part = 'a' + i;
1442                 pp = &lp->d_partitions[i];
1443                 if (part_set[i]) {
1444                         if (part_offset_type[i] == '*') {
1445                                 if (i == RAW_PART) {
1446                                         pp->p_offset = 0;
1447                                 } else {
1448                                         pp->p_offset = current_offset;
1449                                         seen_default_offset = 1;
1450                                 }
1451                         } else {
1452                                 /* allow them to be out of order for old-style tables */
1453                                 if (pp->p_offset < current_offset &&
1454                                     seen_default_offset && i != RAW_PART) {
1455                                         fprintf(stderr,
1456 "Offset %ld for partition %c overlaps previous partition which ends at %lu\n",
1457                                             (long)pp->p_offset,i+'a',current_offset);
1458                                         fprintf(stderr,
1459 "Labels with any *'s for offset must be in ascending order by sector\n");
1460                                         errors++;
1461                                 } else if (pp->p_offset != current_offset &&
1462                                     i != RAW_PART && seen_default_offset) {
1463                                         /*
1464                                          * this may give unneeded warnings if
1465                                          * partitions are out-of-order
1466                                          */
1467                                         Warning(
1468 "Offset %ld for partition %c doesn't match expected value %ld",
1469                                             (long)pp->p_offset, i + 'a', current_offset);
1470                                 }
1471                         }
1472                         if (i != RAW_PART)
1473                                 current_offset = pp->p_offset + pp->p_size;
1474                 }
1475         }
1476
1477         for (i = 0; i < lp->d_npartitions; i++) {
1478                 part = 'a' + i;
1479                 pp = &lp->d_partitions[i];
1480                 if (pp->p_size == 0 && pp->p_offset != 0)
1481                         Warning("partition %c: size 0, but offset %lu",
1482                             part, (u_long)pp->p_offset);
1483 #ifdef __sparc64__
1484                 /* See comment in writelabel(). */
1485                 if (pp->p_offset % lp->d_secpercyl != 0) {
1486                         fprintf(stderr, "partition %c: does not start on a "
1487                             "cylinder boundary!\n", part);
1488                         errors++;
1489                 }
1490 #endif
1491 #ifdef notdef
1492                 if (pp->p_size % lp->d_secpercyl)
1493                         Warning("partition %c: size %% cylinder-size != 0",
1494                             part);
1495                 if (pp->p_offset % lp->d_secpercyl)
1496                         Warning("partition %c: offset %% cylinder-size != 0",
1497                             part);
1498 #endif
1499                 if (pp->p_offset > lp->d_secperunit) {
1500                         fprintf(stderr,
1501                             "partition %c: offset past end of unit\n", part);
1502                         errors++;
1503                 }
1504                 if (pp->p_offset + pp->p_size > lp->d_secperunit) {
1505                         fprintf(stderr,
1506                         "partition %c: partition extends past end of unit\n",
1507                             part);
1508                         errors++;
1509                 }
1510                 if (i == RAW_PART)
1511                 {
1512                         if (pp->p_fstype != FS_UNUSED)
1513                                 Warning("partition %c is not marked as unused!",part);
1514                         if (pp->p_offset != 0)
1515                                 Warning("partition %c doesn't start at 0!",part);
1516                         if (pp->p_size != lp->d_secperunit)
1517                                 Warning("partition %c doesn't cover the whole unit!",part);
1518
1519                         if ((pp->p_fstype != FS_UNUSED) || (pp->p_offset != 0) ||
1520                             (pp->p_size != lp->d_secperunit)) {
1521                                 Warning("An incorrect partition %c may cause problems for "
1522                                     "standard system utilities",part);
1523                         }
1524                 }
1525
1526                 /* check for overlaps */
1527                 /* this will check for all possible overlaps once and only once */
1528                 for (j = 0; j < i; j++) {
1529                         if (j != RAW_PART && i != RAW_PART &&
1530                             part_set[i] && part_set[j]) {
1531                                 pp2 = &lp->d_partitions[j];
1532                                 if (pp2->p_offset < pp->p_offset + pp->p_size &&
1533                                     (pp2->p_offset + pp2->p_size > pp->p_offset ||
1534                                         pp2->p_offset >= pp->p_offset)) {
1535                                         fprintf(stderr,"partitions %c and %c overlap!\n",
1536                                             j + 'a', i + 'a');
1537                                         errors++;
1538                                 }
1539                         }
1540                 }
1541         }
1542         for (; i < MAXPARTITIONS; i++) {
1543                 part = 'a' + i;
1544                 pp = &lp->d_partitions[i];
1545                 if (pp->p_size || pp->p_offset)
1546                         Warning("unused partition %c: size %d offset %lu",
1547                             'a' + i, pp->p_size, (u_long)pp->p_offset);
1548         }
1549         return (errors);
1550 }
1551
1552 /*
1553  * When operating on a "virgin" disk, try getting an initial label
1554  * from the associated device driver.  This might work for all device
1555  * drivers that are able to fetch some initial device parameters
1556  * without even having access to a (BSD) disklabel, like SCSI disks,
1557  * most IDE drives, or vn devices.
1558  *
1559  * The device name must be given in its "canonical" form.
1560  */
1561 struct disklabel *
1562 getvirginlabel(void)
1563 {
1564         static struct disklabel lab;
1565         char namebuf[BBSIZE];
1566         int f;
1567
1568         if (dkname[0] == '/') {
1569                 warnx("\"auto\" requires the usage of a canonical disk name");
1570                 return (NULL);
1571         }
1572         (void)snprintf(namebuf, BBSIZE, "%s%s", _PATH_DEV, dkname);
1573         if ((f = open(namebuf, O_RDONLY)) == -1) {
1574                 warn("cannot open %s", namebuf);
1575                 return (NULL);
1576         }
1577
1578         /*
1579          * Try to use the new get-virgin-label ioctl.  If it fails,
1580          * fallback to the old get-disdk-info ioctl.
1581          */
1582         if (ioctl(f, DIOCGDVIRGIN, &lab) == 0)
1583                 goto out;
1584         if (ioctl(f, DIOCGDINFO, &lab) == 0)
1585                 goto out;
1586         close(f);
1587         (void)snprintf(namebuf, BBSIZE, "%s%s%c", _PATH_DEV, dkname,
1588             'a' + RAW_PART);
1589         if ((f = open(namebuf, O_RDONLY)) == -1) {
1590                 warn("cannot open %s", namebuf);
1591                 return (NULL);
1592         }
1593         if (ioctl(f, DIOCGDINFO, &lab) == 0)
1594                 goto out;
1595         close(f);
1596         warn("No virgin disklabel found %s", namebuf);
1597         return (NULL);
1598     out:
1599         close(f);
1600         return (&lab);
1601 }
1602
1603 /*
1604  * If we are installing a boot program that doesn't fit in d_bbsize
1605  * we need to mark those partitions that the boot overflows into.
1606  * This allows newfs to prevent creation of a filesystem where it might
1607  * clobber bootstrap code.
1608  */
1609 void
1610 setbootflag(struct disklabel *lp)
1611 {
1612         struct partition *pp;
1613         int i, errors = 0;
1614         char part;
1615         u_long boffset;
1616
1617         if (bootbuf == 0)
1618                 return;
1619         boffset = bootsize / lp->d_secsize;
1620         for (i = 0; i < lp->d_npartitions; i++) {
1621                 part = 'a' + i;
1622                 pp = &lp->d_partitions[i];
1623                 if (pp->p_size == 0)
1624                         continue;
1625                 if (boffset <= pp->p_offset) {
1626                         if (pp->p_fstype == FS_BOOT)
1627                                 pp->p_fstype = FS_UNUSED;
1628                 } else if (pp->p_fstype != FS_BOOT) {
1629                         if (pp->p_fstype != FS_UNUSED) {
1630                                 fprintf(stderr,
1631                                         "boot overlaps used partition %c\n",
1632                                         part);
1633                                 errors++;
1634                         } else {
1635                                 pp->p_fstype = FS_BOOT;
1636                                 Warning("boot overlaps partition %c, %s",
1637                                         part, "marked as FS_BOOT");
1638                         }
1639                 }
1640         }
1641         if (errors)
1642                 errx(4, "cannot install boot program");
1643 }
1644
1645 /*VARARGS1*/
1646 void
1647 Warning(const char *fmt, ...)
1648 {
1649         va_list ap;
1650
1651         fprintf(stderr, "Warning, ");
1652         va_start(ap, fmt);
1653         vfprintf(stderr, fmt, ap);
1654         fprintf(stderr, "\n");
1655         va_end(ap);
1656 }
1657
1658 void
1659 usage(void)
1660 {
1661 #if NUMBOOT > 0
1662         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",
1663                 "usage: disklabel [-r] disk",
1664                 "\t\t(to read label)",
1665                 "       disklabel -w [-r] [-n] disk type [ packid ]",
1666                 "\t\t(to write label with existing boot program)",
1667                 "       disklabel -e [-r] [-n] disk",
1668                 "\t\t(to edit label)",
1669                 "       disklabel -R [-r] [-n] disk protofile",
1670                 "\t\t(to restore label with existing boot program)",
1671 #if NUMBOOT > 1
1672                 "       disklabel -B [-n] [ -b boot1 [ -s boot2 ] ] disk [ type ]",
1673                 "\t\t(to install boot program with existing label)",
1674                 "       disklabel -w -B [-n] [ -b boot1 [ -s boot2 ] ] disk type [ packid ]",
1675                 "\t\t(to write label and boot program)",
1676                 "       disklabel -R -B [-n] [ -b boot1 [ -s boot2 ] ] disk protofile [ type ]",
1677                 "\t\t(to restore label and boot program)",
1678 #else
1679                 "       disklabel -B [-n] [ -b bootprog ] disk [ type ]",
1680                 "\t\t(to install boot program with existing on-disk label)",
1681                 "       disklabel -w -B [-n] [ -b bootprog ] disk type [ packid ]",
1682                 "\t\t(to write label and install boot program)",
1683                 "       disklabel -R -B [-n] [ -b bootprog ] disk protofile [ type ]",
1684                 "\t\t(to restore label and install boot program)",
1685 #endif
1686                 "       disklabel [-NW] disk",
1687                 "\t\t(to write disable/enable label)");
1688 #else
1689         fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
1690                 "usage: disklabel [-r] disk", "(to read label)",
1691                 "       disklabel -w [-r] [-n] disk type [ packid ]",
1692                 "\t\t(to write label)",
1693                 "       disklabel -e [-r] [-n] disk",
1694                 "\t\t(to edit label)",
1695                 "       disklabel -R [-r] [-n] disk protofile",
1696                 "\t\t(to restore label)",
1697                 "       disklabel [-NW] disk",
1698                 "\t\t(to write disable/enable label)");
1699 #endif
1700         exit(1);
1701 }