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 #endif /* not lint */
  55
  56 #include <sys/cdefs.h>
  57 __FBSDID("$FreeBSD$");
  58
  59 #include <sys/param.h>
  60 #include <sys/file.h>
  61 #include <sys/stat.h>
  62 #include <sys/wait.h>
  63 #define DKTYPENAMES
  64 #define FSTYPENAMES
  65 #include <sys/disklabel.h>
  66 #ifdef __sparc64__
  67 #include <sys/sun_disklabel.h>
  68 #endif
  69
  70 #include <unistd.h>
  71 #include <string.h>
  72 #include <stdio.h>
  73 #include <stdlib.h>
  74 #include <signal.h>
  75 #include <stdarg.h>
  76 #include <ctype.h>
  77 #include <err.h>
  78 #include <errno.h>
  79
  80 #include "pathnames.h"
  81
  82 /*
  83  * Disklabel: read and write disklabels.
  84  * The label is usually placed on one of the first sectors of the disk.
  85  * Many machines also place a bootstrap in the same area,
  86  * in which case the label is embedded in the bootstrap.
  87  * The bootstrap source must leave space at the proper offset
  88  * for the label on such machines.
  89  */
  90
  91 #ifndef BBSIZE
  92 #define BBSIZE  8192                    /* size of boot area, with label */
  93 #endif
  94
  95 /* FIX!  These are too low, but are traditional */
  96 #define DEFAULT_NEWFS_BLOCK  8192U
  97 #define DEFAULT_NEWFS_FRAG   1024U
  98 #define DEFAULT_NEWFS_CPG    16U
  99
 100 #define BIG_NEWFS_BLOCK  16384U
 101 #define BIG_NEWFS_FRAG   2048U
 102 #define BIG_NEWFS_CPG    64U
 103
 104 #if defined(__i386__) || defined(__ia64__)
 105 #define NUMBOOT 2
 106 #elif defined(__alpha__) || defined(__sparc64__) || defined(__powerpc__)
 107 #define NUMBOOT 1
 108 #else
 109 #error  I do not know about this architecture.
 110 #endif
 111
 112 void    makelabel(const char *, const char *, struct disklabel *);
 113 int     writelabel(int, const char *, struct disklabel *);
 114 void    l_perror(const char *);
 115 struct disklabel *readlabel(int);
 116 struct disklabel *makebootarea(char *, struct disklabel *, int);
 117 void    display(FILE *, const struct disklabel *);
 118 int     edit(struct disklabel *, int);
 119 int     editit(void);
 120 char    *skip(char *);
 121 char    *word(char *);
 122 int     getasciilabel(FILE *, struct disklabel *);
 123 int     getasciipartspec(char *, struct disklabel *, int, int);
 124 int     checklabel(struct disklabel *);
 125 void    setbootflag(struct disklabel *);
 126 void    Warning(const char *, ...) __printflike(1, 2);
 127 void    usage(void);
 128 struct disklabel *getvirginlabel(void);
 129
 130 #define DEFEDITOR       _PATH_VI
 131 #define streq(a,b)      (strcmp(a,b) == 0)
 132
 133 char    *dkname;
 134 char    *specname;
 135 char    tmpfil[] = PATH_TMPFILE;
 136
 137 char    namebuf[BBSIZE], *np = namebuf;
 138 struct  disklabel lab;
 139 char    bootarea[BBSIZE];
 140 char    blank[] = "";
 141 char    unknown[] = "unknown";
 142
 143 #define MAX_PART ('z')
 144 #define MAX_NUM_PARTS (1 + MAX_PART - 'a')
 145 char    part_size_type[MAX_NUM_PARTS];
 146 char    part_offset_type[MAX_NUM_PARTS];
 147 int     part_set[MAX_NUM_PARTS];
 148
 149 #if NUMBOOT > 0
 150 int     installboot;    /* non-zero if we should install a boot program */
 151 char    *bootbuf;       /* pointer to buffer with remainder of boot prog */
 152 int     bootsize;       /* size of remaining boot program */
 153 char    *xxboot;        /* primary boot */
 154 char    *bootxx;        /* secondary boot */
 155 char    boot0[MAXPATHLEN];
 156 char    boot1[MAXPATHLEN];
 157 #endif
 158
 159 enum    {
 160         UNSPEC, EDIT, NOWRITE, READ, RESTORE, WRITE, WRITEABLE, WRITEBOOT
 161 } op = UNSPEC;
 162
 163 int     rflag;
 164 int     disable_write;   /* set to disable writing to disk label */
 165
 166 #define OPTIONS "BNRWb:enrs:w"
 167
 168 int
 169 main(int argc, char *argv[])
 170 {
 171         struct disklabel *lp;
 172         FILE *t;
 173         int ch, f = 0, flag, error = 0;
 174         char *name = 0;
 175
 176         while ((ch = getopt(argc, argv, OPTIONS)) != -1)
 177                 switch (ch) {
 178 #if NUMBOOT > 0
 179                         case 'B':
 180                                 ++installboot;
 181                                 break;
 182                         case 'b':
 183                                 xxboot = optarg;
 184                                 break;
 185 #if NUMBOOT > 1
 186                         case 's':
 187                                 bootxx = optarg;
 188                                 break;
 189 #endif
 190 #endif
 191                         case 'N':
 192                                 if (op != UNSPEC)
 193                                         usage();
 194                                 op = NOWRITE;
 195                                 break;
 196                         case 'n':
 197                                 disable_write = 1;
 198                                 break;
 199                         case 'R':
 200                                 if (op != UNSPEC)
 201                                         usage();
 202                                 op = RESTORE;
 203                                 break;
 204                         case 'W':
 205                                 if (op != UNSPEC)
 206                                         usage();
 207                                 op = WRITEABLE;
 208                                 break;
 209                         case 'e':
 210                                 if (op != UNSPEC)
 211                                         usage();
 212                                 op = EDIT;
 213                                 break;
 214                         case 'r':
 215                                 ++rflag;
 216                                 break;
 217                         case 'w':
 218                                 if (op != UNSPEC)
 219                                         usage();
 220                                 op = WRITE;
 221                                 break;
 222                         case '?':
 223                         default:
 224                                 usage();
 225                 }
 226         argc -= optind;
 227         argv += optind;
 228 #if NUMBOOT > 0
 229         if (installboot) {
 230                 rflag++;
 231                 if (op == UNSPEC)
 232                         op = WRITEBOOT;
 233         } else {
 234                 if (op == UNSPEC)
 235                         op = READ;
 236                 xxboot = bootxx = 0;
 237         }
 238 #else
 239         if (op == UNSPEC)
 240                 op = READ;
 241 #endif
 242         if (argc < 1)
 243                 usage();
 244
 245         dkname = argv[0];
 246         if (dkname[0] != '/') {
 247                 (void)sprintf(np, "%s%s%c", _PATH_DEV, dkname, 'a' + RAW_PART);
 248                 specname = np;
 249                 np += strlen(specname) + 1;
 250         } else
 251                 specname = dkname;
 252         f = open(specname, op == READ ? O_RDONLY : O_RDWR);
 253         if (f < 0 && errno == ENOENT && dkname[0] != '/') {
 254                 (void)sprintf(specname, "%s%s", _PATH_DEV, dkname);
 255                 np = namebuf + strlen(specname) + 1;
 256                 f = open(specname, op == READ ? O_RDONLY : O_RDWR);
 257         }
 258         if (f < 0)
 259                 err(4, "%s", specname);
 260
 261         switch(op) {
 262
 263         case UNSPEC:
 264                 break;
 265
 266         case EDIT:
 267                 if (argc != 1)
 268                         usage();
 269                 lp = readlabel(f);
 270                 error = edit(lp, f);
 271                 break;
 272
 273         case NOWRITE:
 274                 flag = 0;
 275                 if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0)
 276                         err(4, "ioctl DIOCWLABEL");
 277                 break;
 278
 279         case READ:
 280                 if (argc != 1)
 281                         usage();
 282                 lp = readlabel(f);
 283                 display(stdout, lp);
 284                 error = checklabel(lp);
 285                 break;
 286
 287         case RESTORE:
 288 #if NUMBOOT > 0
 289                 if (installboot && argc == 3) {
 290                         makelabel(argv[2], 0, &lab);
 291                         argc--;
 292
 293                         /*
 294                          * We only called makelabel() for its side effect
 295                          * of setting the bootstrap file names.  Discard
 296                          * all changes to `lab' so that all values in the
 297                          * final label come from the ASCII label.
 298                          */
 299                         bzero((char *)&lab, sizeof(lab));
 300                 }
 301 #endif
 302                 if (argc != 2)
 303                         usage();
 304                 if (!(t = fopen(argv[1], "r")))
 305                         err(4, "%s", argv[1]);
 306                 if (!getasciilabel(t, &lab))
 307                         exit(1);
 308                 lp = makebootarea(bootarea, &lab, f);
 309                 *lp = lab;
 310                 error = writelabel(f, bootarea, lp);
 311                 break;
 312
 313         case WRITE:
 314                 if (argc == 3) {
 315                         name = argv[2];
 316                         argc--;
 317                 }
 318                 if (argc != 2)
 319                         usage();
 320                 makelabel(argv[1], name, &lab);
 321                 lp = makebootarea(bootarea, &lab, f);
 322                 *lp = lab;
 323                 if (checklabel(lp) == 0)
 324                         error = writelabel(f, bootarea, lp);
 325                 break;
 326
 327         case WRITEABLE:
 328                 flag = 1;
 329                 if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0)
 330                         err(4, "ioctl DIOCWLABEL");
 331                 break;
 332
 333 #if NUMBOOT > 0
 334         case WRITEBOOT:
 335         {
 336                 struct disklabel tlab;
 337
 338                 lp = readlabel(f);
 339                 tlab = *lp;
 340                 if (argc == 2)
 341                         makelabel(argv[1], 0, &lab);
 342                 lp = makebootarea(bootarea, &lab, f);
 343                 *lp = tlab;
 344                 if (checklabel(lp) == 0)
 345                         error = writelabel(f, bootarea, lp);
 346                 break;
 347         }
 348 #endif
 349         }
 350         exit(error);
 351 }
 352
 353 /*
 354  * Construct a prototype disklabel from /etc/disktab.  As a side
 355  * effect, set the names of the primary and secondary boot files
 356  * if specified.
 357  */
 358 void
 359 makelabel(const char *type, const char *name, struct disklabel *lp)
 360 {
 361         struct disklabel *dp;
 362
 363         if (strcmp(type, "auto") == 0)
 364                 dp = getvirginlabel();
 365         else
 366                 dp = getdiskbyname(type);
 367         if (dp == NULL)
 368                 errx(1, "%s: unknown disk type", type);
 369         *lp = *dp;
 370         bzero(lp->d_packname, sizeof(lp->d_packname));
 371         if (name)
 372                 (void)strncpy(lp->d_packname, name, sizeof(lp->d_packname));
 373 }
 374
 375 int
 376 writelabel(int f, const char *boot, struct disklabel *lp)
 377 {
 378         int flag;
 379 #ifdef __alpha__
 380         u_long *p, sum;
 381         int i;
 382 #endif
 383 #ifdef __sparc64__
 384         struct sun_disklabel *sl;
 385         u_short cksum, *sp1, *sp2;
 386         struct partition *npp;
 387         struct sun_dkpart *spp;
 388         int i, secpercyl;
 389 #endif
 390
 391         if (disable_write) {
 392                 Warning("write to disk label supressed - label was as follows:");
 393                 display(stdout, lp);
 394                 return (0);
 395         } else {
 396                 setbootflag(lp);
 397                 lp->d_magic = DISKMAGIC;
 398                 lp->d_magic2 = DISKMAGIC;
 399                 lp->d_checksum = 0;
 400                 lp->d_checksum = dkcksum(lp);
 401                 if (rflag) {
 402                         /*
 403                          * First set the kernel disk label,
 404                          * then write a label to the raw disk.
 405                          * If the SDINFO ioctl fails because it is unimplemented,
 406                          * keep going; otherwise, the kernel consistency checks
 407                          * may prevent us from changing the current (in-core)
 408                          * label.
 409                          */
 410                         if (ioctl(f, DIOCSDINFO, lp) < 0 &&
 411                                 errno != ENODEV && errno != ENOTTY) {
 412                                 l_perror("ioctl DIOCSDINFO");
 413                                 return (1);
 414                         }
 415                         (void)lseek(f, (off_t)0, SEEK_SET);
 416
 417 #ifdef __alpha__
 418                         /*
 419                          * Generate the bootblock checksum for the SRM console.
 420                          */
 421                         for (p = (u_long *)boot, i = 0, sum = 0; i < 63; i++)
 422                                 sum += p[i];
 423                         p[63] = sum;
 424 #endif
 425 #ifdef __sparc64__
 426                         /*
 427                          * Generate a Sun disklabel around the BSD label for
 428                          * PROM compatability.
 429                          */
 430                         sl = (struct sun_disklabel *)boot;
 431                         memcpy(sl->sl_text, lp->d_packname, sizeof(lp->d_packname));
 432                         sl->sl_rpm = lp->d_rpm;
 433                         sl->sl_pcylinders = lp->d_ncylinders +
 434                             lp->d_acylinders; /* XXX */
 435                         sl->sl_sparespercyl = lp->d_sparespercyl;
 436                         sl->sl_interleave = lp->d_interleave;
 437                         sl->sl_ncylinders = lp->d_ncylinders;
 438                         sl->sl_acylinders = lp->d_acylinders;
 439                         sl->sl_ntracks = lp->d_ntracks;
 440                         sl->sl_nsectors = lp->d_nsectors;
 441                         sl->sl_magic = SUN_DKMAGIC;
 442                         secpercyl = sl->sl_nsectors * sl->sl_ntracks;
 443                         for (i = 0; i < 8; i++) {
 444                                 spp = &sl->sl_part[i];
 445                                 npp = &lp->d_partitions[i];
 446                                 /*
 447                                  * SunOS partitions must start on a cylinder
 448                                  * boundary. Note this restriction is forced
 449                                  * upon FreeBSD/sparc64 labels too, since we
 450                                  * want to keep both labels synchronised.
 451                                  */
 452                                 spp->sdkp_cyloffset = npp->p_offset / secpercyl;
 453                                 spp->sdkp_nsectors = npp->p_size;
 454                         }
 455
 456                         /* Compute the XOR checksum. */
 457                         sp1 = (u_short *)sl;
 458                         sp2 = (u_short *)(sl + 1);
 459                         sl->sl_cksum = cksum = 0;
 460                         while (sp1 < sp2)
 461                                 cksum ^= *sp1++;
 462                         sl->sl_cksum = cksum;
 463 #endif
 464                         /*
 465                          * write enable label sector before write (if necessary),
 466                          * disable after writing.
 467                          */
 468                         flag = 1;
 469                         if (ioctl(f, DIOCWLABEL, &flag) < 0)
 470                                 warn("ioctl DIOCWLABEL");
 471                         if (write(f, boot, lp->d_bbsize) != (int)lp->d_bbsize) {
 472                                 warn("write");
 473                                 return (1);
 474                         }
 475 #if NUMBOOT > 0
 476                         /*
 477                          * Output the remainder of the disklabel
 478                          */
 479                         if (bootbuf && write(f, bootbuf, bootsize) != bootsize) {
 480                                 warn("write");
 481                                 return(1);
 482                         }
 483 #endif
 484                         flag = 0;
 485                         (void) ioctl(f, DIOCWLABEL, &flag);
 486                 } else if (ioctl(f, DIOCWDINFO, lp) < 0) {
 487                         l_perror("ioctl DIOCWDINFO");
 488                         return (1);
 489                 }
 490         }
 491         return (0);
 492 }
 493
 494 void
 495 l_perror(const char *s)
 496 {
 497         switch (errno) {
 498
 499         case ESRCH:
 500                 warnx("%s: no disk label on disk;", s);
 501                 fprintf(stderr, "add \"-r\" to install initial label\n");
 502                 break;
 503
 504         case EINVAL:
 505                 warnx("%s: label magic number or checksum is wrong!", s);
 506                 fprintf(stderr, "(disklabel or kernel is out of date?)\n");
 507                 break;
 508
 509         case EBUSY:
 510                 warnx("%s: open partition would move or shrink", s);
 511                 break;
 512
 513         case EXDEV:
 514                 warnx("%s: '%c' partition must start at beginning of disk",
 515                     s, 'a' + RAW_PART);
 516                 break;
 517
 518         default:
 519                 warn((char *)NULL);
 520                 break;
 521         }
 522 }
 523
 524 /*
 525  * Fetch disklabel for disk.
 526  * Use ioctl to get label unless -r flag is given.
 527  */
 528 struct disklabel *
 529 readlabel(int f)
 530 {
 531         struct disklabel *lp;
 532
 533         if (rflag) {
 534                 if (read(f, bootarea, BBSIZE) < BBSIZE)
 535                         err(4, "%s", specname);
 536                 for (lp = (struct disklabel *)bootarea;
 537                     lp <= (struct disklabel *)(bootarea + BBSIZE - sizeof(*lp));
 538                     lp = (struct disklabel *)((char *)lp + 16))
 539                         if (lp->d_magic == DISKMAGIC &&
 540                             lp->d_magic2 == DISKMAGIC)
 541                                 break;
 542                 if (lp > (struct disklabel *)(bootarea+BBSIZE-sizeof(*lp)) ||
 543                     lp->d_magic != DISKMAGIC || lp->d_magic2 != DISKMAGIC ||
 544                     dkcksum(lp) != 0)
 545                         errx(1,
 546             "bad pack magic number (label is damaged, or pack is unlabeled)");
 547         } else {
 548                 lp = &lab;
 549                 if (ioctl(f, DIOCGDINFO, lp) < 0)
 550                         err(4, "ioctl DIOCGDINFO");
 551         }
 552         return (lp);
 553 }
 554
 555 /*
 556  * Construct a bootarea (d_bbsize bytes) in the specified buffer ``boot''
 557  * Returns a pointer to the disklabel portion of the bootarea.
 558  */
 559 struct disklabel *
 560 makebootarea(char *boot, struct disklabel *dp, int f)
 561 {
 562         struct disklabel *lp;
 563         char *p;
 564         int b;
 565 #if NUMBOOT > 0
 566         char *dkbasename;
 567         struct stat sb;
 568 #endif
 569 #ifdef __alpha__
 570         u_long *bootinfo;
 571         int n;
 572 #endif
 573 #ifdef __i386__
 574         char *tmpbuf;
 575         int i, found;
 576 #endif
 577
 578         /* XXX */
 579         if (dp->d_secsize == 0) {
 580                 dp->d_secsize = DEV_BSIZE;
 581                 dp->d_bbsize = BBSIZE;
 582         }
 583         lp = (struct disklabel *)
 584                 (boot + (LABELSECTOR * dp->d_secsize) + LABELOFFSET);
 585         bzero((char *)lp, sizeof *lp);
 586 #if NUMBOOT > 0
 587         /*
 588          * If we are not installing a boot program but we are installing a
 589          * label on disk then we must read the current bootarea so we don't
 590          * clobber the existing boot.
 591          */
 592         if (!installboot) {
 593                 if (rflag) {
 594                         if (read(f, boot, BBSIZE) < BBSIZE)
 595                                 err(4, "%s", specname);
 596                         bzero((char *)lp, sizeof *lp);
 597                 }
 598                 return (lp);
 599         }
 600         /*
 601          * We are installing a boot program.  Determine the name(s) and
 602          * read them into the appropriate places in the boot area.
 603          */
 604         if (!xxboot || !bootxx) {
 605                 dkbasename = np;
 606                 if ((p = rindex(dkname, '/')) == NULL)
 607                         p = dkname;
 608                 else
 609                         p++;
 610                 while (*p && !isdigit(*p))
 611                         *np++ = *p++;
 612                 *np++ = '\0';
 613
 614                 if (!xxboot) {
 615                         (void)sprintf(boot0, "%s/boot1", _PATH_BOOTDIR);
 616                         xxboot = boot0;
 617                 }
 618 #if NUMBOOT > 1
 619                 if (!bootxx) {
 620                         (void)sprintf(boot1, "%s/boot2", _PATH_BOOTDIR);
 621                         bootxx = boot1;
 622                 }
 623 #endif
 624         }
 625
 626         /*
 627          * Strange rules:
 628          * 1. One-piece bootstrap (hp300/hp800)
 629          * 1. One-piece bootstrap (alpha/sparc64)
 630          *      up to d_bbsize bytes of ``xxboot'' go in bootarea, the rest
 631          *      is remembered and written later following the bootarea.
 632          * 2. Two-piece bootstraps (i386/ia64)
 633          *      up to d_secsize bytes of ``xxboot'' go in first d_secsize
 634          *      bytes of bootarea, remaining d_bbsize-d_secsize filled
 635          *      from ``bootxx''.
 636          */
 637         b = open(xxboot, O_RDONLY);
 638         if (b < 0)
 639                 err(4, "%s", xxboot);
 640 #if NUMBOOT > 1
 641 #ifdef __i386__
 642         /*
 643          * XXX Botch alert.
 644          * The i386 has the so-called fdisk table embedded into the
 645          * primary bootstrap.  We take care to not clobber it, but
 646          * only if it does already contain some data.  (Otherwise,
 647          * the xxboot provides a template.)
 648          */
 649         if ((tmpbuf = (char *)malloc((int)dp->d_secsize)) == 0)
 650                 err(4, "%s", xxboot);
 651         memcpy((void *)tmpbuf, (void *)boot, (int)dp->d_secsize);
 652 #endif /* __i386__ */
 653         if (read(b, boot, (int)dp->d_secsize) < 0)
 654                 err(4, "%s", xxboot);
 655         (void)close(b);
 656 #ifdef __i386__
 657         for (i = DOSPARTOFF, found = 0;
 658              !found && i < (int)(DOSPARTOFF + NDOSPART*sizeof(struct dos_partition));
 659              i++)
 660                 found = tmpbuf[i] != 0;
 661         if (found)
 662                 memcpy((void *)&boot[DOSPARTOFF],
 663                        (void *)&tmpbuf[DOSPARTOFF],
 664                        NDOSPART * sizeof(struct dos_partition));
 665         free(tmpbuf);
 666 #endif /* __i386__ */
 667         b = open(bootxx, O_RDONLY);
 668         if (b < 0)
 669                 err(4, "%s", bootxx);
 670         if (fstat(b, &sb) != 0)
 671                 err(4, "%s", bootxx);
 672         if (dp->d_secsize + sb.st_size > dp->d_bbsize)
 673                 errx(4, "%s too large", bootxx);
 674         if (read(b, &boot[dp->d_secsize],
 675                  (int)(dp->d_bbsize-dp->d_secsize)) < 0)
 676                 err(4, "%s", bootxx);
 677 #else /* !(NUMBOOT > 1) */
 678 #ifdef __alpha__
 679         /*
 680          * On the alpha, the primary bootstrap starts at the
 681          * second sector of the boot area.  The first sector
 682          * contains the label and must be edited to contain the
 683          * size and location of the primary bootstrap.
 684          */
 685         n = read(b, boot + dp->d_secsize, (int)dp->d_bbsize);
 686         if (n < 0)
 687                 err(4, "%s", xxboot);
 688         bootinfo = (u_long *)(boot + 480);
 689         bootinfo[0] = (n + dp->d_secsize - 1) / dp->d_secsize;
 690         bootinfo[1] = 1;        /* start at sector 1 */
 691         bootinfo[2] = 0;        /* flags (must be zero) */
 692 #else /* !__alpha__ */
 693         if (read(b, boot, (int)dp->d_bbsize) < 0)
 694                 err(4, "%s", xxboot);
 695 #endif /* __alpha__ */
 696         if (fstat(b, &sb) != 0)
 697                 err(4, "%s", xxboot);
 698         bootsize = (int)sb.st_size - dp->d_bbsize;
 699         if (bootsize > 0) {
 700                 /* XXX assume d_secsize is a power of two */
 701                 bootsize = (bootsize + dp->d_secsize-1) & ~(dp->d_secsize-1);
 702                 bootbuf = (char *)malloc((size_t)bootsize);
 703                 if (bootbuf == 0)
 704                         err(4, "%s", xxboot);
 705                 if (read(b, bootbuf, bootsize) < 0) {
 706                         free(bootbuf);
 707                         err(4, "%s", xxboot);
 708                 }
 709         }
 710 #endif /* NUMBOOT > 1 */
 711         (void)close(b);
 712 #endif /* NUMBOOT > 0 */
 713         /*
 714          * Make sure no part of the bootstrap is written in the area
 715          * reserved for the label.
 716          */
 717         for (p = (char *)lp; p < (char *)lp + sizeof(struct disklabel); p++)
 718                 if (*p)
 719                         errx(2, "bootstrap doesn't leave room for disk label");
 720         return (lp);
 721 }
 722
 723 void
 724 display(FILE *f, const struct disklabel *lp)
 725 {
 726         int i, j;
 727         const struct partition *pp;
 728
 729         fprintf(f, "# %s:\n", specname);
 730         if ((unsigned) lp->d_type < DKMAXTYPES)
 731                 fprintf(f, "type: %s\n", dktypenames[lp->d_type]);
 732         else
 733                 fprintf(f, "type: %u\n", lp->d_type);
 734         fprintf(f, "disk: %.*s\n", (int)sizeof(lp->d_typename),
 735                 lp->d_typename);
 736         fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname),
 737                 lp->d_packname);
 738         fprintf(f, "flags:");
 739         if (lp->d_flags & D_REMOVABLE)
 740                 fprintf(f, " removeable");
 741         if (lp->d_flags & D_ECC)
 742                 fprintf(f, " ecc");
 743         if (lp->d_flags & D_BADSECT)
 744                 fprintf(f, " badsect");
 745         fprintf(f, "\n");
 746         fprintf(f, "bytes/sector: %lu\n", (u_long)lp->d_secsize);
 747         fprintf(f, "sectors/track: %lu\n", (u_long)lp->d_nsectors);
 748         fprintf(f, "tracks/cylinder: %lu\n", (u_long)lp->d_ntracks);
 749         fprintf(f, "sectors/cylinder: %lu\n", (u_long)lp->d_secpercyl);
 750         fprintf(f, "cylinders: %lu\n", (u_long)lp->d_ncylinders);
 751         fprintf(f, "sectors/unit: %lu\n", (u_long)lp->d_secperunit);
 752         fprintf(f, "rpm: %u\n", lp->d_rpm);
 753         fprintf(f, "interleave: %u\n", lp->d_interleave);
 754         fprintf(f, "trackskew: %u\n", lp->d_trackskew);
 755         fprintf(f, "cylinderskew: %u\n", lp->d_cylskew);
 756         fprintf(f, "headswitch: %lu\t\t# milliseconds\n",
 757             (u_long)lp->d_headswitch);
 758         fprintf(f, "track-to-track seek: %ld\t# milliseconds\n",
 759             (u_long)lp->d_trkseek);
 760         fprintf(f, "drivedata: ");
 761         for (i = NDDATA - 1; i >= 0; i--)
 762                 if (lp->d_drivedata[i])
 763                         break;
 764         if (i < 0)
 765                 i = 0;
 766         for (j = 0; j <= i; j++)
 767                 fprintf(f, "%lu ", (u_long)lp->d_drivedata[j]);
 768         fprintf(f, "\n\n%u partitions:\n", lp->d_npartitions);
 769         fprintf(f,
 770             "#        size   offset    fstype   [fsize bsize bps/cpg]\n");
 771         pp = lp->d_partitions;
 772         for (i = 0; i < lp->d_npartitions; i++, pp++) {
 773                 if (pp->p_size) {
 774                         fprintf(f, "  %c: %8lu %8lu  ", 'a' + i,
 775                            (u_long)pp->p_size, (u_long)pp->p_offset);
 776                         if ((unsigned) pp->p_fstype < FSMAXTYPES)
 777                                 fprintf(f, "%8.8s", fstypenames[pp->p_fstype]);
 778                         else
 779                                 fprintf(f, "%8d", pp->p_fstype);
 780                         switch (pp->p_fstype) {
 781
 782                         case FS_UNUSED:                         /* XXX */
 783                                 fprintf(f, "    %5lu %5lu %5.5s ",
 784                                     (u_long)pp->p_fsize,
 785                                     (u_long)(pp->p_fsize * pp->p_frag), "");
 786                                 break;
 787
 788                         case FS_BSDFFS:
 789                                 fprintf(f, "    %5lu %5lu %5u ",
 790                                     (u_long)pp->p_fsize,
 791                                     (u_long)(pp->p_fsize * pp->p_frag),
 792                                     pp->p_cpg);
 793                                 break;
 794
 795                         case FS_BSDLFS:
 796                                 fprintf(f, "    %5lu %5lu %5d",
 797                                     (u_long)pp->p_fsize,
 798                                     (u_long)(pp->p_fsize * pp->p_frag),
 799                                     pp->p_cpg);
 800                                 break;
 801
 802                         default:
 803                                 fprintf(f, "%20.20s", "");
 804                                 break;
 805                         }
 806                         fprintf(f, "\t# (Cyl. %4lu",
 807                             (u_long)(pp->p_offset / lp->d_secpercyl));
 808                         if (pp->p_offset % lp->d_secpercyl)
 809                             putc('*', f);
 810                         else
 811                             putc(' ', f);
 812                         fprintf(f, "- %lu",
 813                             (u_long)((pp->p_offset + pp->p_size +
 814                             lp->d_secpercyl - 1) /
 815                             lp->d_secpercyl - 1));
 816                         if (pp->p_size % lp->d_secpercyl)
 817                             putc('*', f);
 818                         fprintf(f, ")\n");
 819                 }
 820         }
 821         fflush(f);
 822 }
 823
 824 int
 825 edit(struct disklabel *lp, int f)
 826 {
 827         int c, fd;
 828         struct disklabel label;
 829         FILE *fp;
 830
 831         if ((fd = mkstemp(tmpfil)) == -1 ||
 832             (fp = fdopen(fd, "w")) == NULL) {
 833                 warnx("can't create %s", tmpfil);
 834                 return (1);
 835         }
 836         display(fp, lp);
 837         fclose(fp);
 838         for (;;) {
 839                 if (!editit())
 840                         break;
 841                 fp = fopen(tmpfil, "r");
 842                 if (fp == NULL) {
 843                         warnx("can't reopen %s for reading", tmpfil);
 844                         break;
 845                 }
 846                 bzero((char *)&label, sizeof(label));
 847                 if (getasciilabel(fp, &label)) {
 848                         *lp = label;
 849                         if (writelabel(f, bootarea, lp) == 0) {
 850                                 fclose(fp);
 851                                 (void) unlink(tmpfil);
 852                                 return (0);
 853                         }
 854                 }
 855                 fclose(fp);
 856                 printf("re-edit the label? [y]: "); fflush(stdout);
 857                 c = getchar();
 858                 if (c != EOF && c != (int)'\n')
 859                         while (getchar() != (int)'\n')
 860                                 ;
 861                 if  (c == (int)'n')
 862                         break;
 863         }
 864         (void) unlink(tmpfil);
 865         return (1);
 866 }
 867
 868 int
 869 editit(void)
 870 {
 871         int pid, xpid;
 872         int locstat, omask;
 873         const char *ed;
 874
 875         omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP));
 876         while ((pid = fork()) < 0) {
 877                 if (errno == EPROCLIM) {
 878                         warnx("you have too many processes");
 879                         return(0);
 880                 }
 881                 if (errno != EAGAIN) {
 882                         warn("fork");
 883                         return(0);
 884                 }
 885                 sleep(1);
 886         }
 887         if (pid == 0) {
 888                 sigsetmask(omask);
 889                 setgid(getgid());
 890                 setuid(getuid());
 891                 if ((ed = getenv("EDITOR")) == (char *)0)
 892                         ed = DEFEDITOR;
 893                 execlp(ed, ed, tmpfil, (char *)0);
 894                 err(1, "%s", ed);
 895         }
 896         while ((xpid = wait(&locstat)) >= 0)
 897                 if (xpid == pid)
 898                         break;
 899         sigsetmask(omask);
 900         return(!locstat);
 901 }
 902
 903 char *
 904 skip(char *cp)
 905 {
 906
 907         while (*cp != '\0' && isspace(*cp))
 908                 cp++;
 909         if (*cp == '\0' || *cp == '#')
 910                 return (NULL);
 911         return (cp);
 912 }
 913
 914 char *
 915 word(char *cp)
 916 {
 917         char c;
 918
 919         while (*cp != '\0' && !isspace(*cp) && *cp != '#')
 920                 cp++;
 921         if ((c = *cp) != '\0') {
 922                 *cp++ = '\0';
 923                 if (c != '#')
 924                         return (skip(cp));
 925         }
 926         return (NULL);
 927 }
 928
 929 /*
 930  * Read an ascii label in from fd f,
 931  * in the same format as that put out by display(),
 932  * and fill in lp.
 933  */
 934 int
 935 getasciilabel(FILE *f, struct disklabel *lp)
 936 {
 937         char *cp;
 938         const char **cpp;
 939         unsigned int part;
 940         char *tp, line[BUFSIZ];
 941         int v, lineno = 0, errors = 0;
 942         int i;
 943
 944         lp->d_bbsize = BBSIZE;                          /* XXX */
 945         lp->d_sbsize = 0;                               /* XXX */
 946         while (fgets(line, sizeof(line) - 1, f)) {
 947                 lineno++;
 948                 if ((cp = index(line,'\n')) != 0)
 949                         *cp = '\0';
 950                 cp = skip(line);
 951                 if (cp == NULL)
 952                         continue;
 953                 tp = index(cp, ':');
 954                 if (tp == NULL) {
 955                         fprintf(stderr, "line %d: syntax error\n", lineno);
 956                         errors++;
 957                         continue;
 958                 }
 959                 *tp++ = '\0', tp = skip(tp);
 960                 if (streq(cp, "type")) {
 961                         if (tp == NULL)
 962                                 tp = unknown;
 963                         cpp = dktypenames;
 964                         for (; cpp < &dktypenames[DKMAXTYPES]; cpp++)
 965                                 if (*cpp && streq(*cpp, tp)) {
 966                                         lp->d_type = cpp - dktypenames;
 967                                         break;
 968                                 }
 969                         if (cpp < &dktypenames[DKMAXTYPES])
 970                                 continue;
 971                         v = atoi(tp);
 972                         if ((unsigned)v >= DKMAXTYPES)
 973                                 fprintf(stderr, "line %d:%s %d\n", lineno,
 974                                     "Warning, unknown disk type", v);
 975                         lp->d_type = v;
 976                         continue;
 977                 }
 978                 if (streq(cp, "flags")) {
 979                         for (v = 0; (cp = tp) && *cp != '\0';) {
 980                                 tp = word(cp);
 981                                 if (streq(cp, "removeable"))
 982                                         v |= D_REMOVABLE;
 983                                 else if (streq(cp, "ecc"))
 984                                         v |= D_ECC;
 985                                 else if (streq(cp, "badsect"))
 986                                         v |= D_BADSECT;
 987                                 else {
 988                                         fprintf(stderr,
 989                                             "line %d: %s: bad flag\n",
 990                                             lineno, cp);
 991                                         errors++;
 992                                 }
 993                         }
 994                         lp->d_flags = v;
 995                         continue;
 996                 }
 997                 if (streq(cp, "drivedata")) {
 998                         for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA;) {
 999                                 lp->d_drivedata[i++] = atoi(cp);
1000                                 tp = word(cp);
1001                         }
1002                         continue;
1003                 }
1004                 if (sscanf(cp, "%d partitions", &v) == 1) {
1005                         if (v == 0 || (unsigned)v > MAXPARTITIONS) {
1006                                 fprintf(stderr,
1007                                     "line %d: bad # of partitions\n", lineno);
1008                                 lp->d_npartitions = MAXPARTITIONS;
1009                                 errors++;
1010                         } else
1011                                 lp->d_npartitions = v;
1012                         continue;
1013                 }
1014                 if (tp == NULL)
1015                         tp = blank;
1016                 if (streq(cp, "disk")) {
1017                         strncpy(lp->d_typename, tp, sizeof (lp->d_typename));
1018                         continue;
1019                 }
1020                 if (streq(cp, "label")) {
1021                         strncpy(lp->d_packname, tp, sizeof (lp->d_packname));
1022                         continue;
1023                 }
1024                 if (streq(cp, "bytes/sector")) {
1025                         v = atoi(tp);
1026                         if (v <= 0 || (v % DEV_BSIZE) != 0) {
1027                                 fprintf(stderr,
1028                                     "line %d: %s: bad sector size\n",
1029                                     lineno, tp);
1030                                 errors++;
1031                         } else
1032                                 lp->d_secsize = v;
1033                         continue;
1034                 }
1035                 if (streq(cp, "sectors/track")) {
1036                         v = atoi(tp);
1037                         if (v <= 0) {
1038                                 fprintf(stderr, "line %d: %s: bad %s\n",
1039                                     lineno, tp, cp);
1040                                 errors++;
1041                         } else
1042                                 lp->d_nsectors = v;
1043                         continue;
1044                 }
1045                 if (streq(cp, "sectors/cylinder")) {
1046                         v = atoi(tp);
1047                         if (v <= 0) {
1048                                 fprintf(stderr, "line %d: %s: bad %s\n",
1049                                     lineno, tp, cp);
1050                                 errors++;
1051                         } else
1052                                 lp->d_secpercyl = v;
1053                         continue;
1054                 }
1055                 if (streq(cp, "tracks/cylinder")) {
1056                         v = atoi(tp);
1057                         if (v <= 0) {
1058                                 fprintf(stderr, "line %d: %s: bad %s\n",
1059                                     lineno, tp, cp);
1060                                 errors++;
1061                         } else
1062                                 lp->d_ntracks = v;
1063                         continue;
1064                 }
1065                 if (streq(cp, "cylinders")) {
1066                         v = atoi(tp);
1067                         if (v <= 0) {
1068                                 fprintf(stderr, "line %d: %s: bad %s\n",
1069                                     lineno, tp, cp);
1070                                 errors++;
1071                         } else
1072                                 lp->d_ncylinders = v;
1073                         continue;
1074                 }
1075                 if (streq(cp, "sectors/unit")) {
1076                         v = atoi(tp);
1077                         if (v <= 0) {
1078                                 fprintf(stderr, "line %d: %s: bad %s\n",
1079                                     lineno, tp, cp);
1080                                 errors++;
1081                         } else
1082                                 lp->d_secperunit = v;
1083                         continue;
1084                 }
1085                 if (streq(cp, "rpm")) {
1086                         v = atoi(tp);
1087                         if (v <= 0) {
1088                                 fprintf(stderr, "line %d: %s: bad %s\n",
1089                                     lineno, tp, cp);
1090                                 errors++;
1091                         } else
1092                                 lp->d_rpm = v;
1093                         continue;
1094                 }
1095                 if (streq(cp, "interleave")) {
1096                         v = atoi(tp);
1097                         if (v <= 0) {
1098                                 fprintf(stderr, "line %d: %s: bad %s\n",
1099                                     lineno, tp, cp);
1100                                 errors++;
1101                         } else
1102                                 lp->d_interleave = v;
1103                         continue;
1104                 }
1105                 if (streq(cp, "trackskew")) {
1106                         v = atoi(tp);
1107                         if (v < 0) {
1108                                 fprintf(stderr, "line %d: %s: bad %s\n",
1109                                     lineno, tp, cp);
1110                                 errors++;
1111                         } else
1112                                 lp->d_trackskew = v;
1113                         continue;
1114                 }
1115                 if (streq(cp, "cylinderskew")) {
1116                         v = atoi(tp);
1117                         if (v < 0) {
1118                                 fprintf(stderr, "line %d: %s: bad %s\n",
1119                                     lineno, tp, cp);
1120                                 errors++;
1121                         } else
1122                                 lp->d_cylskew = v;
1123                         continue;
1124                 }
1125                 if (streq(cp, "headswitch")) {
1126                         v = atoi(tp);
1127                         if (v < 0) {
1128                                 fprintf(stderr, "line %d: %s: bad %s\n",
1129                                     lineno, tp, cp);
1130                                 errors++;
1131                         } else
1132                                 lp->d_headswitch = v;
1133                         continue;
1134                 }
1135                 if (streq(cp, "track-to-track seek")) {
1136                         v = atoi(tp);
1137                         if (v < 0) {
1138                                 fprintf(stderr, "line %d: %s: bad %s\n",
1139                                     lineno, tp, cp);
1140                                 errors++;
1141                         } else
1142                                 lp->d_trkseek = v;
1143                         continue;
1144                 }
1145                 /* the ':' was removed above */
1146                 if (*cp < 'a' || *cp > MAX_PART || cp[1] != '\0') {
1147                         fprintf(stderr,
1148                             "line %d: %s: Unknown disklabel field\n", lineno,
1149                             cp);
1150                         errors++;
1151                         continue;
1152                 }
1153
1154                 /* Process a partition specification line. */
1155                 part = *cp - 'a';
1156                 if (part >= lp->d_npartitions) {
1157                         fprintf(stderr,
1158                             "line %d: partition name out of range a-%c: %s\n",
1159                             lineno, 'a' + lp->d_npartitions - 1, cp);
1160                         errors++;
1161                         continue;
1162                 }
1163                 part_set[part] = 1;
1164
1165                 if (getasciipartspec(tp, lp, part, lineno) != 0) {
1166                         errors++;
1167                         break;
1168                 }
1169         }
1170         errors += checklabel(lp);
1171         return (errors == 0);
1172 }
1173
1174 #define NXTNUM(n) do { \
1175         if (tp == NULL) { \
1176                 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \
1177                 return (1); \
1178         } else { \
1179                 cp = tp, tp = word(cp); \
1180                 (n) = atoi(cp); \
1181         } \
1182 } while (0)
1183
1184 /* retain 1 character following number */
1185 #define NXTWORD(w,n) do { \
1186         if (tp == NULL) { \
1187                 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \
1188                 return (1); \
1189         } else { \
1190                 char *tmp; \
1191                 cp = tp, tp = word(cp); \
1192                 (n) = strtol(cp,&tmp,10); \
1193                 if (tmp) (w) = *tmp; \
1194         } \
1195 } while (0)
1196
1197 /*
1198  * Read a partition line into partition `part' in the specified disklabel.
1199  * Return 0 on success, 1 on failure.
1200  */
1201 int
1202 getasciipartspec(char *tp, struct disklabel *lp, int part, int lineno)
1203 {
1204         struct partition *pp;
1205         char *cp;
1206         const char **cpp;
1207         int v;
1208
1209         pp = &lp->d_partitions[part];
1210         cp = NULL;
1211
1212         v = 0;
1213         NXTWORD(part_size_type[part],v);
1214         if (v < 0 || (v == 0 && part_size_type[part] != '*')) {
1215                 fprintf(stderr, "line %d: %s: bad partition size\n", lineno,
1216                     cp);
1217                 return (1);
1218         }
1219         pp->p_size = v;
1220
1221         v = 0;
1222         NXTWORD(part_offset_type[part],v);
1223         if (v < 0 || (v == 0 && part_offset_type[part] != '*' &&
1224             part_offset_type[part] != '\0')) {
1225                 fprintf(stderr, "line %d: %s: bad partition offset\n", lineno,
1226                     cp);
1227                 return (1);
1228         }
1229         pp->p_offset = v;
1230         cp = tp, tp = word(cp);
1231         for (cpp = fstypenames; cpp < &fstypenames[FSMAXTYPES]; cpp++)
1232                 if (*cpp && streq(*cpp, cp))
1233                         break;
1234         if (*cpp != NULL) {
1235                 pp->p_fstype = cpp - fstypenames;
1236         } else {
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 file system type %s\n",
1244                             lineno, cp);
1245                         v = FS_UNUSED;
1246                 }
1247                 pp->p_fstype = v;
1248         }
1249
1250         switch (pp->p_fstype) {
1251         case FS_UNUSED:
1252                 /*
1253                  * allow us to accept defaults for
1254                  * fsize/frag/cpg
1255                  */
1256                 if (tp) {
1257                         NXTNUM(pp->p_fsize);
1258                         if (pp->p_fsize == 0)
1259                                 break;
1260                         NXTNUM(v);
1261                         pp->p_frag = v / pp->p_fsize;
1262                 }
1263                 /* else default to 0's */
1264                 break;
1265
1266         /* These happen to be the same */
1267         case FS_BSDFFS:
1268         case FS_BSDLFS:
1269                 if (tp) {
1270                         NXTNUM(pp->p_fsize);
1271                         if (pp->p_fsize == 0)
1272                                 break;
1273                         NXTNUM(v);
1274                         pp->p_frag = v / pp->p_fsize;
1275                         NXTNUM(pp->p_cpg);
1276                 } else {
1277                         /*
1278                          * FIX! poor attempt at adaptive
1279                          */
1280                         /* 1 GB */
1281                         if (pp->p_size < 1024*1024*1024 / lp->d_secsize) {
1282                                 /*
1283                                  * FIX! These are too low, but are traditional
1284                                  */
1285                                 pp->p_fsize = DEFAULT_NEWFS_FRAG;
1286                                 pp->p_frag = DEFAULT_NEWFS_BLOCK /
1287                                     DEFAULT_NEWFS_FRAG;
1288                                 pp->p_cpg = DEFAULT_NEWFS_CPG;
1289                         } else {
1290                                 pp->p_fsize = BIG_NEWFS_FRAG;
1291                                 pp->p_frag = BIG_NEWFS_BLOCK /
1292                                     BIG_NEWFS_FRAG;
1293                                 pp->p_cpg = BIG_NEWFS_CPG;
1294                         }
1295                 }
1296         default:
1297                 break;
1298         }
1299         return (0);
1300 }
1301
1302 /*
1303  * Check disklabel for errors and fill in
1304  * derived fields according to supplied values.
1305  */
1306 int
1307 checklabel(struct disklabel *lp)
1308 {
1309         struct partition *pp;
1310         int i, errors = 0;
1311         char part;
1312         unsigned long total_size, total_percent, current_offset;
1313         int seen_default_offset;
1314         int hog_part;
1315         int j;
1316         struct partition *pp2;
1317
1318         if (lp->d_secsize == 0) {
1319                 fprintf(stderr, "sector size 0\n");
1320                 return (1);
1321         }
1322         if (lp->d_nsectors == 0) {
1323                 fprintf(stderr, "sectors/track 0\n");
1324                 return (1);
1325         }
1326         if (lp->d_ntracks == 0) {
1327                 fprintf(stderr, "tracks/cylinder 0\n");
1328                 return (1);
1329         }
1330         if  (lp->d_ncylinders == 0) {
1331                 fprintf(stderr, "cylinders/unit 0\n");
1332                 errors++;
1333         }
1334         if (lp->d_rpm == 0)
1335                 Warning("revolutions/minute 0");
1336         if (lp->d_secpercyl == 0)
1337                 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks;
1338         if (lp->d_secperunit == 0)
1339                 lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders;
1340         if (lp->d_bbsize == 0) {
1341                 fprintf(stderr, "boot block size 0\n");
1342                 errors++;
1343         } else if (lp->d_bbsize % lp->d_secsize)
1344                 Warning("boot block size %% sector-size != 0");
1345         if (lp->d_npartitions > MAXPARTITIONS)
1346                 Warning("number of partitions (%lu) > MAXPARTITIONS (%d)",
1347                     (u_long)lp->d_npartitions, MAXPARTITIONS);
1348
1349         /* first allocate space to the partitions, then offsets */
1350         total_size = 0; /* in sectors */
1351         total_percent = 0; /* in percent */
1352         hog_part = -1;
1353         /* find all fixed partitions */
1354         for (i = 0; i < lp->d_npartitions; i++) {
1355                 pp = &lp->d_partitions[i];
1356                 if (part_set[i]) {
1357                         if (part_size_type[i] == '*') {
1358                                 if (i == RAW_PART) {
1359                                         pp->p_size = lp->d_secperunit;
1360                                 } else {
1361                                         if (hog_part != -1)
1362                                                 Warning("Too many '*' partitions (%c and %c)",
1363                                                     hog_part + 'a',i + 'a');
1364                                         else
1365                                                 hog_part = i;
1366                                 }
1367                         } else {
1368                                 off_t size;
1369
1370                                 size = pp->p_size;
1371                                 switch (part_size_type[i]) {
1372                                 case '%':
1373                                         total_percent += size;
1374                                         break;
1375                                 case 'k':
1376                                 case 'K':
1377                                         size *= 1024ULL;
1378                                         break;
1379                                 case 'm':
1380                                 case 'M':
1381                                         size *= 1024ULL * 1024ULL;
1382                                         break;
1383                                 case 'g':
1384                                 case 'G':
1385                                         size *= 1024ULL * 1024ULL * 1024ULL;
1386                                         break;
1387                                 case '\0':
1388                                         break;
1389                                 default:
1390                                         Warning("unknown size specifier '%c' (K/M/G are valid)",part_size_type[i]);
1391                                         break;
1392                                 }
1393                                 /* don't count %'s yet */
1394                                 if (part_size_type[i] != '%') {
1395                                         /*
1396                                          * for all not in sectors, convert to
1397                                          * sectors
1398                                          */
1399                                         if (part_size_type[i] != '\0') {
1400                                                 if (size % lp->d_secsize != 0)
1401                                                         Warning("partition %c not an integer number of sectors",
1402                                                             i + 'a');
1403                                                 size /= lp->d_secsize;
1404                                                 pp->p_size = size;
1405                                         }
1406                                         /* else already in sectors */
1407                                         if (i != RAW_PART)
1408                                                 total_size += size;
1409                                 }
1410                         }
1411                 }
1412         }
1413         /* handle % partitions - note %'s don't need to add up to 100! */
1414         if (total_percent != 0) {
1415                 long free_space = lp->d_secperunit - total_size;
1416                 if (total_percent > 100) {
1417                         fprintf(stderr,"total percentage %lu is greater than 100\n",
1418                             total_percent);
1419                         errors++;
1420                 }
1421
1422                 if (free_space > 0) {
1423                         for (i = 0; i < lp->d_npartitions; i++) {
1424                                 pp = &lp->d_partitions[i];
1425                                 if (part_set[i] && part_size_type[i] == '%') {
1426                                         /* careful of overflows! and integer roundoff */
1427                                         pp->p_size = ((double)pp->p_size/100) * free_space;
1428                                         total_size += pp->p_size;
1429
1430                                         /* FIX we can lose a sector or so due to roundoff per
1431                                            partition.  A more complex algorithm could avoid that */
1432                                 }
1433                         }
1434                 } else {
1435                         fprintf(stderr,
1436                             "%ld sectors available to give to '*' and '%%' partitions\n",
1437                             free_space);
1438                         errors++;
1439                         /* fix?  set all % partitions to size 0? */
1440                 }
1441         }
1442         /* give anything remaining to the hog partition */
1443         if (hog_part != -1) {
1444                 lp->d_partitions[hog_part].p_size = lp->d_secperunit - total_size;
1445                 total_size = lp->d_secperunit;
1446         }
1447
1448         /* Now set the offsets for each partition */
1449         current_offset = 0; /* in sectors */
1450         seen_default_offset = 0;
1451         for (i = 0; i < lp->d_npartitions; i++) {
1452                 part = 'a' + i;
1453                 pp = &lp->d_partitions[i];
1454                 if (part_set[i]) {
1455                         if (part_offset_type[i] == '*') {
1456                                 if (i == RAW_PART) {
1457                                         pp->p_offset = 0;
1458                                 } else {
1459                                         pp->p_offset = current_offset;
1460                                         seen_default_offset = 1;
1461                                 }
1462                         } else {
1463                                 /* allow them to be out of order for old-style tables */
1464                                 if (pp->p_offset < current_offset &&
1465                                     seen_default_offset && i != RAW_PART) {
1466                                         fprintf(stderr,
1467 "Offset %ld for partition %c overlaps previous partition which ends at %lu\n",
1468                                             (long)pp->p_offset,i+'a',current_offset);
1469                                         fprintf(stderr,
1470 "Labels with any *'s for offset must be in ascending order by sector\n");
1471                                         errors++;
1472                                 } else if (pp->p_offset != current_offset &&
1473                                     i != RAW_PART && seen_default_offset) {
1474                                         /*
1475                                          * this may give unneeded warnings if
1476                                          * partitions are out-of-order
1477                                          */
1478                                         Warning(
1479 "Offset %ld for partition %c doesn't match expected value %ld",
1480                                             (long)pp->p_offset, i + 'a', current_offset);
1481                                 }
1482                         }
1483                         if (i != RAW_PART)
1484                                 current_offset = pp->p_offset + pp->p_size;
1485                 }
1486         }
1487
1488         for (i = 0; i < lp->d_npartitions; i++) {
1489                 part = 'a' + i;
1490                 pp = &lp->d_partitions[i];
1491                 if (pp->p_size == 0 && pp->p_offset != 0)
1492                         Warning("partition %c: size 0, but offset %lu",
1493                             part, (u_long)pp->p_offset);
1494 #ifdef __sparc64__
1495                 /* See comment in writelabel(). */
1496                 if (pp->p_offset % lp->d_secpercyl != 0) {
1497                         fprintf(stderr, "partition %c: does not start on a "
1498                             "cylinder boundary!\n", part);
1499                         errors++;
1500                 }
1501 #endif
1502 #ifdef notdef
1503                 if (pp->p_size % lp->d_secpercyl)
1504                         Warning("partition %c: size %% cylinder-size != 0",
1505                             part);
1506                 if (pp->p_offset % lp->d_secpercyl)
1507                         Warning("partition %c: offset %% cylinder-size != 0",
1508                             part);
1509 #endif
1510                 if (pp->p_offset > lp->d_secperunit) {
1511                         fprintf(stderr,
1512                             "partition %c: offset past end of unit\n", part);
1513                         errors++;
1514                 }
1515                 if (pp->p_offset + pp->p_size > lp->d_secperunit) {
1516                         fprintf(stderr,
1517                         "partition %c: partition extends past end of unit\n",
1518                             part);
1519                         errors++;
1520                 }
1521                 if (i == RAW_PART)
1522                 {
1523                         if (pp->p_fstype != FS_UNUSED)
1524                                 Warning("partition %c is not marked as unused!",part);
1525                         if (pp->p_offset != 0)
1526                                 Warning("partition %c doesn't start at 0!",part);
1527                         if (pp->p_size != lp->d_secperunit)
1528                                 Warning("partition %c doesn't cover the whole unit!",part);
1529
1530                         if ((pp->p_fstype != FS_UNUSED) || (pp->p_offset != 0) ||
1531                             (pp->p_size != lp->d_secperunit)) {
1532                                 Warning("An incorrect partition %c may cause problems for "
1533                                     "standard system utilities",part);
1534                         }
1535                 }
1536
1537                 /* check for overlaps */
1538                 /* this will check for all possible overlaps once and only once */
1539                 for (j = 0; j < i; j++) {
1540                         if (j != RAW_PART && i != RAW_PART &&
1541                             part_set[i] && part_set[j]) {
1542                                 pp2 = &lp->d_partitions[j];
1543                                 if (pp2->p_offset < pp->p_offset + pp->p_size &&
1544                                     (pp2->p_offset + pp2->p_size > pp->p_offset ||
1545                                         pp2->p_offset >= pp->p_offset)) {
1546                                         fprintf(stderr,"partitions %c and %c overlap!\n",
1547                                             j + 'a', i + 'a');
1548                                         errors++;
1549                                 }
1550                         }
1551                 }
1552         }
1553         for (; i < MAXPARTITIONS; i++) {
1554                 part = 'a' + i;
1555                 pp = &lp->d_partitions[i];
1556                 if (pp->p_size || pp->p_offset)
1557                         Warning("unused partition %c: size %d offset %lu",
1558                             'a' + i, pp->p_size, (u_long)pp->p_offset);
1559         }
1560         return (errors);
1561 }
1562
1563 /*
1564  * When operating on a "virgin" disk, try getting an initial label
1565  * from the associated device driver.  This might work for all device
1566  * drivers that are able to fetch some initial device parameters
1567  * without even having access to a (BSD) disklabel, like SCSI disks,
1568  * most IDE drives, or vn devices.
1569  *
1570  * The device name must be given in its "canonical" form.
1571  */
1572 struct disklabel *
1573 getvirginlabel(void)
1574 {
1575         static struct disklabel loclab;
1576         char lnamebuf[BBSIZE];
1577         int f;
1578
1579         if (dkname[0] == '/') {
1580                 warnx("\"auto\" requires the usage of a canonical disk name");
1581                 return (NULL);
1582         }
1583         (void)snprintf(lnamebuf, BBSIZE, "%s%s", _PATH_DEV, dkname);
1584         if ((f = open(lnamebuf, O_RDONLY)) == -1) {
1585                 warn("cannot open %s", lnamebuf);
1586                 return (NULL);
1587         }
1588
1589         /*
1590          * Try to use the new get-virgin-label ioctl.  If it fails,
1591          * fallback to the old get-disdk-info ioctl.
1592          */
1593         if (ioctl(f, DIOCGDVIRGIN, &loclab) == 0)
1594                 goto out;
1595         if (ioctl(f, DIOCGDINFO, &loclab) == 0)
1596                 goto out;
1597         close(f);
1598         (void)snprintf(lnamebuf, BBSIZE, "%s%s%c", _PATH_DEV, dkname,
1599             'a' + RAW_PART);
1600         if ((f = open(lnamebuf, O_RDONLY)) == -1) {
1601                 warn("cannot open %s", lnamebuf);
1602                 return (NULL);
1603         }
1604         if (ioctl(f, DIOCGDINFO, &loclab) == 0)
1605                 goto out;
1606         close(f);
1607         warn("No virgin disklabel found %s", lnamebuf);
1608         return (NULL);
1609     out:
1610         close(f);
1611         return (&loclab);
1612 }
1613
1614 /*
1615  * If we are installing a boot program that doesn't fit in d_bbsize
1616  * we need to mark those partitions that the boot overflows into.
1617  * This allows newfs to prevent creation of a file system where it might
1618  * clobber bootstrap code.
1619  */
1620 void
1621 setbootflag(struct disklabel *lp)
1622 {
1623         struct partition *pp;
1624         int i, errors = 0;
1625         char part;
1626         u_long boffset;
1627
1628         if (bootbuf == 0)
1629                 return;
1630         boffset = bootsize / lp->d_secsize;
1631         for (i = 0; i < lp->d_npartitions; i++) {
1632                 part = 'a' + i;
1633                 pp = &lp->d_partitions[i];
1634                 if (pp->p_size == 0)
1635                         continue;
1636                 if (boffset <= pp->p_offset) {
1637                         if (pp->p_fstype == FS_BOOT)
1638                                 pp->p_fstype = FS_UNUSED;
1639                 } else if (pp->p_fstype != FS_BOOT) {
1640                         if (pp->p_fstype != FS_UNUSED) {
1641                                 fprintf(stderr,
1642                                         "boot overlaps used partition %c\n",
1643                                         part);
1644                                 errors++;
1645                         } else {
1646                                 pp->p_fstype = FS_BOOT;
1647                                 Warning("boot overlaps partition %c, %s",
1648                                         part, "marked as FS_BOOT");
1649                         }
1650                 }
1651         }
1652         if (errors)
1653                 errx(4, "cannot install boot program");
1654 }
1655
1656 /*VARARGS1*/
1657 void
1658 Warning(const char *fmt, ...)
1659 {
1660         va_list ap;
1661
1662         fprintf(stderr, "Warning, ");
1663         va_start(ap, fmt);
1664         vfprintf(stderr, fmt, ap);
1665         fprintf(stderr, "\n");
1666         va_end(ap);
1667 }
1668
1669 void
1670 usage(void)
1671 {
1672 #if NUMBOOT > 0
1673         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",
1674                 "usage: disklabel [-r] disk",
1675                 "\t\t(to read label)",
1676                 "       disklabel -w [-r] [-n] disk type [ packid ]",
1677                 "\t\t(to write label with existing boot program)",
1678                 "       disklabel -e [-r] [-n] disk",
1679                 "\t\t(to edit label)",
1680                 "       disklabel -R [-r] [-n] disk protofile",
1681                 "\t\t(to restore label with existing boot program)",
1682 #if NUMBOOT > 1
1683                 "       disklabel -B [-n] [ -b boot1 [ -s boot2 ] ] disk [ type ]",
1684                 "\t\t(to install boot program with existing label)",
1685                 "       disklabel -w -B [-n] [ -b boot1 [ -s boot2 ] ] disk type [ packid ]",
1686                 "\t\t(to write label and boot program)",
1687                 "       disklabel -R -B [-n] [ -b boot1 [ -s boot2 ] ] disk protofile [ type ]",
1688                 "\t\t(to restore label and boot program)",
1689 #else
1690                 "       disklabel -B [-n] [ -b bootprog ] disk [ type ]",
1691                 "\t\t(to install boot program with existing on-disk label)",
1692                 "       disklabel -w -B [-n] [ -b bootprog ] disk type [ packid ]",
1693                 "\t\t(to write label and install boot program)",
1694                 "       disklabel -R -B [-n] [ -b bootprog ] disk protofile [ type ]",
1695                 "\t\t(to restore label and install boot program)",
1696 #endif
1697                 "       disklabel [-NW] disk",
1698                 "\t\t(to write disable/enable label)");
1699 #else
1700         fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
1701                 "usage: disklabel [-r] disk", "(to read label)",
1702                 "       disklabel -w [-r] [-n] disk type [ packid ]",
1703                 "\t\t(to write label)",
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)",
1708                 "       disklabel [-NW] disk",
1709                 "\t\t(to write disable/enable label)");
1710 #endif
1711         exit(1);
1712 }