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 #include <sys/disk.h>
  64 #define DKTYPENAMES
  65 #define FSTYPENAMES
  66 #include <sys/disklabel.h>
  67 #include <sys/diskmbr.h>
  68 #ifdef __sparc64__
  69 #include <sys/sun_disklabel.h>
  70 #endif
  71
  72 #include <unistd.h>
  73 #include <string.h>
  74 #include <stdio.h>
  75 #include <stdlib.h>
  76 #include <signal.h>
  77 #include <stdarg.h>
  78 #include <ctype.h>
  79 #include <err.h>
  80 #include <errno.h>
  81
  82 #include "pathnames.h"
  83
  84 /*
  85  * Disklabel: read and write disklabels.
  86  * The label is usually placed on one of the first sectors of the disk.
  87  * Many machines also place a bootstrap in the same area,
  88  * in which case the label is embedded in the bootstrap.
  89  * The bootstrap source must leave space at the proper offset
  90  * for the label on such machines.
  91  */
  92
  93 #ifndef BBSIZE
  94 #define BBSIZE  8192                    /* size of boot area, with label */
  95 #endif
  96
  97 /* FIX!  These are too low, but are traditional */
  98 #define DEFAULT_NEWFS_BLOCK  8192U
  99 #define DEFAULT_NEWFS_FRAG   1024U
 100 #define DEFAULT_NEWFS_CPG    16U
 101
 102 #define BIG_NEWFS_BLOCK  16384U
 103 #define BIG_NEWFS_FRAG   2048U
 104 #define BIG_NEWFS_CPG    64U
 105
 106 #if defined(__i386__) || defined(__ia64__)
 107 #define NUMBOOT 2
 108 #elif defined(__alpha__) || defined(__sparc64__) || defined(__powerpc__)
 109 #define NUMBOOT 1
 110 #else
 111 #error  I do not know about this architecture.
 112 #endif
 113
 114 void    makelabel(const char *, const char *, struct disklabel *);
 115 int     writelabel(int, const char *, struct disklabel *);
 116 void    l_perror(const char *);
 117 struct disklabel *readlabel(int);
 118 struct disklabel *makebootarea(char *, struct disklabel *, int);
 119 void    display(FILE *, const struct disklabel *);
 120 int     edit(struct disklabel *, int);
 121 int     editit(void);
 122 char    *skip(char *);
 123 char    *word(char *);
 124 int     getasciilabel(FILE *, struct disklabel *);
 125 int     getasciipartspec(char *, struct disklabel *, int, int);
 126 int     checklabel(struct disklabel *);
 127 void    setbootflag(struct disklabel *);
 128 void    Warning(const char *, ...) __printflike(1, 2);
 129 void    usage(void);
 130 struct disklabel *getvirginlabel(void);
 131
 132 #define DEFEDITOR       _PATH_VI
 133 #define streq(a,b)      (strcmp(a,b) == 0)
 134
 135 char    *dkname;
 136 char    *specname;
 137 char    tmpfil[] = PATH_TMPFILE;
 138
 139 char    namebuf[BBSIZE], *np = namebuf;
 140 struct  disklabel lab;
 141 char    bootarea[BBSIZE];
 142 char    blank[] = "";
 143 char    unknown[] = "unknown";
 144
 145 #define MAX_PART ('z')
 146 #define MAX_NUM_PARTS (1 + MAX_PART - 'a')
 147 char    part_size_type[MAX_NUM_PARTS];
 148 char    part_offset_type[MAX_NUM_PARTS];
 149 int     part_set[MAX_NUM_PARTS];
 150
 151 #if NUMBOOT > 0
 152 int     installboot;    /* non-zero if we should install a boot program */
 153 char    *bootbuf;       /* pointer to buffer with remainder of boot prog */
 154 int     bootsize;       /* size of remaining boot program */
 155 char    *xxboot;        /* primary boot */
 156 char    *bootxx;        /* secondary boot */
 157 char    boot0[MAXPATHLEN];
 158 char    boot1[MAXPATHLEN];
 159 #endif
 160
 161 enum    {
 162         UNSPEC, EDIT, NOWRITE, READ, RESTORE, WRITE, WRITEABLE, WRITEBOOT
 163 } op = UNSPEC;
 164
 165 int     rflag;
 166 int     disable_write;   /* set to disable writing to disk label */
 167
 168 #define OPTIONS "BNRWb:enrs:w"
 169
 170 int
 171 main(int argc, char *argv[])
 172 {
 173         struct disklabel *lp;
 174         FILE *t;
 175         int ch, f = 0, flag, error = 0;
 176         char *name = 0;
 177
 178         while ((ch = getopt(argc, argv, OPTIONS)) != -1)
 179                 switch (ch) {
 180 #if NUMBOOT > 0
 181                         case 'B':
 182                                 ++installboot;
 183                                 break;
 184                         case 'b':
 185                                 xxboot = optarg;
 186                                 break;
 187 #if NUMBOOT > 1
 188                         case 's':
 189                                 bootxx = optarg;
 190                                 break;
 191 #endif
 192 #endif
 193                         case 'N':
 194                                 if (op != UNSPEC)
 195                                         usage();
 196                                 op = NOWRITE;
 197                                 break;
 198                         case 'n':
 199                                 disable_write = 1;
 200                                 break;
 201                         case 'R':
 202                                 if (op != UNSPEC)
 203                                         usage();
 204                                 op = RESTORE;
 205                                 break;
 206                         case 'W':
 207                                 if (op != UNSPEC)
 208                                         usage();
 209                                 op = WRITEABLE;
 210                                 break;
 211                         case 'e':
 212                                 if (op != UNSPEC)
 213                                         usage();
 214                                 op = EDIT;
 215                                 break;
 216                         case 'r':
 217                                 ++rflag;
 218                                 break;
 219                         case 'w':
 220                                 if (op != UNSPEC)
 221                                         usage();
 222                                 op = WRITE;
 223                                 break;
 224                         case '?':
 225                         default:
 226                                 usage();
 227                 }
 228         argc -= optind;
 229         argv += optind;
 230 #if NUMBOOT > 0
 231         if (installboot) {
 232                 rflag++;
 233                 if (op == UNSPEC)
 234                         op = WRITEBOOT;
 235         } else {
 236                 if (op == UNSPEC)
 237                         op = READ;
 238                 xxboot = bootxx = 0;
 239         }
 240 #else
 241         if (op == UNSPEC)
 242                 op = READ;
 243 #endif
 244         if (argc < 1)
 245                 usage();
 246
 247         dkname = argv[0];
 248         if (dkname[0] != '/') {
 249                 (void)sprintf(np, "%s%s%c", _PATH_DEV, dkname, 'a' + RAW_PART);
 250                 specname = np;
 251                 np += strlen(specname) + 1;
 252         } else
 253                 specname = dkname;
 254         f = open(specname, op == READ ? O_RDONLY : O_RDWR);
 255         if (f < 0 && errno == ENOENT && dkname[0] != '/') {
 256                 (void)sprintf(specname, "%s%s", _PATH_DEV, dkname);
 257                 np = namebuf + strlen(specname) + 1;
 258                 f = open(specname, op == READ ? O_RDONLY : O_RDWR);
 259         }
 260         if (f < 0)
 261                 err(4, "%s", specname);
 262
 263         switch(op) {
 264
 265         case UNSPEC:
 266                 break;
 267
 268         case EDIT:
 269                 if (argc != 1)
 270                         usage();
 271                 lp = readlabel(f);
 272                 error = edit(lp, f);
 273                 break;
 274
 275         case NOWRITE:
 276                 flag = 0;
 277                 if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0)
 278                         err(4, "ioctl DIOCWLABEL");
 279                 break;
 280
 281         case READ:
 282                 if (argc != 1)
 283                         usage();
 284                 lp = readlabel(f);
 285                 display(stdout, lp);
 286                 error = checklabel(lp);
 287                 break;
 288
 289         case RESTORE:
 290 #if NUMBOOT > 0
 291                 if (installboot && argc == 3) {
 292                         makelabel(argv[2], 0, &lab);
 293                         argc--;
 294
 295                         /*
 296                          * We only called makelabel() for its side effect
 297                          * of setting the bootstrap file names.  Discard
 298                          * all changes to `lab' so that all values in the
 299                          * final label come from the ASCII label.
 300                          */
 301                         bzero((char *)&lab, sizeof(lab));
 302                 }
 303 #endif
 304                 if (argc != 2)
 305                         usage();
 306                 if (!(t = fopen(argv[1], "r")))
 307                         err(4, "%s", argv[1]);
 308                 if (!getasciilabel(t, &lab))
 309                         exit(1);
 310                 lp = makebootarea(bootarea, &lab, f);
 311                 *lp = lab;
 312                 error = writelabel(f, bootarea, lp);
 313                 break;
 314
 315         case WRITE:
 316                 if (argc == 3) {
 317                         name = argv[2];
 318                         argc--;
 319                 }
 320                 if (argc != 2)
 321                         usage();
 322                 makelabel(argv[1], name, &lab);
 323                 lp = makebootarea(bootarea, &lab, f);
 324                 *lp = lab;
 325                 if (checklabel(lp) == 0)
 326                         error = writelabel(f, bootarea, lp);
 327                 break;
 328
 329         case WRITEABLE:
 330                 flag = 1;
 331                 if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0)
 332                         err(4, "ioctl DIOCWLABEL");
 333                 break;
 334
 335 #if NUMBOOT > 0
 336         case WRITEBOOT:
 337         {
 338                 struct disklabel tlab;
 339
 340                 lp = readlabel(f);
 341                 tlab = *lp;
 342                 if (argc == 2)
 343                         makelabel(argv[1], 0, &lab);
 344                 lp = makebootarea(bootarea, &lab, f);
 345                 *lp = tlab;
 346                 if (checklabel(lp) == 0)
 347                         error = writelabel(f, bootarea, lp);
 348                 break;
 349         }
 350 #endif
 351         }
 352         exit(error);
 353 }
 354
 355 /*
 356  * Construct a prototype disklabel from /etc/disktab.  As a side
 357  * effect, set the names of the primary and secondary boot files
 358  * if specified.
 359  */
 360 void
 361 makelabel(const char *type, const char *name, struct disklabel *lp)
 362 {
 363         struct disklabel *dp;
 364
 365         if (strcmp(type, "auto") == 0)
 366                 dp = getvirginlabel();
 367         else
 368                 dp = getdiskbyname(type);
 369         if (dp == NULL)
 370                 errx(1, "%s: unknown disk type", type);
 371         *lp = *dp;
 372         bzero(lp->d_packname, sizeof(lp->d_packname));
 373         if (name)
 374                 (void)strncpy(lp->d_packname, name, sizeof(lp->d_packname));
 375 }
 376
 377 int
 378 writelabel(int f, const char *boot, struct disklabel *lp)
 379 {
 380         int flag;
 381 #ifdef __alpha__
 382         u_long *p, sum;
 383         int i;
 384 #endif
 385 #ifdef __sparc64__
 386         struct sun_disklabel *sl;
 387         u_short cksum, *sp1, *sp2;
 388         struct partition *npp;
 389         struct sun_dkpart *spp;
 390         int i, secpercyl;
 391 #endif
 392
 393         if (disable_write) {
 394                 Warning("write to disk label supressed - label was as follows:");
 395                 display(stdout, lp);
 396                 return (0);
 397         } else {
 398                 setbootflag(lp);
 399                 lp->d_magic = DISKMAGIC;
 400                 lp->d_magic2 = DISKMAGIC;
 401                 lp->d_checksum = 0;
 402                 lp->d_checksum = dkcksum(lp);
 403                 if (rflag) {
 404                         /*
 405                          * First set the kernel disk label,
 406                          * then write a label to the raw disk.
 407                          * If the SDINFO ioctl fails because it is unimplemented,
 408                          * keep going; otherwise, the kernel consistency checks
 409                          * may prevent us from changing the current (in-core)
 410                          * label.
 411                          */
 412                         if (ioctl(f, DIOCSDINFO, lp) < 0 &&
 413                                 errno != ENODEV && errno != ENOTTY) {
 414                                 l_perror("ioctl DIOCSDINFO");
 415                                 return (1);
 416                         }
 417                         (void)lseek(f, (off_t)0, SEEK_SET);
 418
 419 #ifdef __alpha__
 420                         /*
 421                          * Generate the bootblock checksum for the SRM console.
 422                          */
 423                         for (p = (u_long *)boot, i = 0, sum = 0; i < 63; i++)
 424                                 sum += p[i];
 425                         p[63] = sum;
 426 #endif
 427 #ifdef __sparc64__
 428                         /*
 429                          * Generate a Sun disklabel around the BSD label for
 430                          * PROM compatability.
 431                          */
 432                         sl = (struct sun_disklabel *)boot;
 433                         memcpy(sl->sl_text, lp->d_packname, sizeof(lp->d_packname));
 434                         sl->sl_rpm = lp->d_rpm;
 435                         sl->sl_pcylinders = lp->d_ncylinders +
 436                             lp->d_acylinders; /* XXX */
 437                         sl->sl_sparespercyl = lp->d_sparespercyl;
 438                         sl->sl_interleave = lp->d_interleave;
 439                         sl->sl_ncylinders = lp->d_ncylinders;
 440                         sl->sl_acylinders = lp->d_acylinders;
 441                         sl->sl_ntracks = lp->d_ntracks;
 442                         sl->sl_nsectors = lp->d_nsectors;
 443                         sl->sl_magic = SUN_DKMAGIC;
 444                         secpercyl = sl->sl_nsectors * sl->sl_ntracks;
 445                         for (i = 0; i < 8; i++) {
 446                                 spp = &sl->sl_part[i];
 447                                 npp = &lp->d_partitions[i];
 448                                 /*
 449                                  * SunOS partitions must start on a cylinder
 450                                  * boundary. Note this restriction is forced
 451                                  * upon FreeBSD/sparc64 labels too, since we
 452                                  * want to keep both labels synchronised.
 453                                  */
 454                                 spp->sdkp_cyloffset = npp->p_offset / secpercyl;
 455                                 spp->sdkp_nsectors = npp->p_size;
 456                         }
 457
 458                         /* Compute the XOR checksum. */
 459                         sp1 = (u_short *)sl;
 460                         sp2 = (u_short *)(sl + 1);
 461                         sl->sl_cksum = cksum = 0;
 462                         while (sp1 < sp2)
 463                                 cksum ^= *sp1++;
 464                         sl->sl_cksum = cksum;
 465 #endif
 466                         /*
 467                          * write enable label sector before write (if necessary),
 468                          * disable after writing.
 469                          */
 470                         flag = 1;
 471                         (void)ioctl(f, DIOCWLABEL, &flag);
 472                         if (write(f, boot, lp->d_bbsize) != (int)lp->d_bbsize) {
 473                                 warn("write");
 474                                 return (1);
 475                         }
 476 #if NUMBOOT > 0
 477                         /*
 478                          * Output the remainder of the disklabel
 479                          */
 480                         if (bootbuf && write(f, bootbuf, bootsize) != bootsize) {
 481                                 warn("write");
 482                                 return(1);
 483                         }
 484 #endif
 485                         flag = 0;
 486                         (void) ioctl(f, DIOCWLABEL, &flag);
 487                 } else if (ioctl(f, DIOCWDINFO, lp) < 0) {
 488                         l_perror("ioctl DIOCWDINFO");
 489                         return (1);
 490                 }
 491         }
 492         return (0);
 493 }
 494
 495 void
 496 l_perror(const char *s)
 497 {
 498         switch (errno) {
 499
 500         case ESRCH:
 501                 warnx("%s: no disk label on disk;", s);
 502                 fprintf(stderr, "add \"-r\" to install initial label\n");
 503                 break;
 504
 505         case EINVAL:
 506                 warnx("%s: label magic number or checksum is wrong!", s);
 507                 fprintf(stderr, "(disklabel or kernel is out of date?)\n");
 508                 break;
 509
 510         case EBUSY:
 511                 warnx("%s: open partition would move or shrink", s);
 512                 break;
 513
 514         case EXDEV:
 515                 warnx("%s: '%c' partition must start at beginning of disk",
 516                     s, 'a' + RAW_PART);
 517                 break;
 518
 519         default:
 520                 warn((char *)NULL);
 521                 break;
 522         }
 523 }
 524
 525 /*
 526  * Fetch disklabel for disk.
 527  * Use ioctl to get label unless -r flag is given.
 528  */
 529 struct disklabel *
 530 readlabel(int f)
 531 {
 532         struct disklabel *lp;
 533
 534         if (rflag) {
 535                 if (read(f, bootarea, BBSIZE) < BBSIZE)
 536                         err(4, "%s", specname);
 537                 for (lp = (struct disklabel *)bootarea;
 538                     lp <= (struct disklabel *)(bootarea + BBSIZE - sizeof(*lp));
 539                     lp = (struct disklabel *)((char *)lp + 16))
 540                         if (lp->d_magic == DISKMAGIC &&
 541                             lp->d_magic2 == DISKMAGIC)
 542                                 break;
 543                 if (lp > (struct disklabel *)(bootarea+BBSIZE-sizeof(*lp)) ||
 544                     lp->d_magic != DISKMAGIC || lp->d_magic2 != DISKMAGIC ||
 545                     dkcksum(lp) != 0)
 546                         errx(1,
 547             "bad pack magic number (label is damaged, or pack is unlabeled)");
 548         } else {
 549                 lp = &lab;
 550                 if (ioctl(f, DIOCGDINFO, lp) < 0)
 551                         err(4, "ioctl DIOCGDINFO");
 552         }
 553         return (lp);
 554 }
 555
 556 /*
 557  * Construct a bootarea (d_bbsize bytes) in the specified buffer ``boot''
 558  * Returns a pointer to the disklabel portion of the bootarea.
 559  */
 560 struct disklabel *
 561 makebootarea(char *boot, struct disklabel *dp, int f)
 562 {
 563         struct disklabel *lp;
 564         char *p;
 565         int b;
 566 #if NUMBOOT > 0
 567         char *dkbasename;
 568         struct stat sb;
 569 #endif
 570 #ifdef __alpha__
 571         u_long *bootinfo;
 572         int n;
 573 #endif
 574 #ifdef __i386__
 575         char *tmpbuf;
 576         int i, found;
 577 #endif
 578
 579         /* XXX */
 580         if (dp->d_secsize == 0) {
 581                 dp->d_secsize = DEV_BSIZE;
 582                 dp->d_bbsize = BBSIZE;
 583         }
 584         lp = (struct disklabel *)
 585                 (boot + (LABELSECTOR * dp->d_secsize) + LABELOFFSET);
 586         bzero((char *)lp, sizeof *lp);
 587 #if NUMBOOT > 0
 588         /*
 589          * If we are not installing a boot program but we are installing a
 590          * label on disk then we must read the current bootarea so we don't
 591          * clobber the existing boot.
 592          */
 593         if (!installboot) {
 594                 if (rflag) {
 595                         if (read(f, boot, BBSIZE) < BBSIZE)
 596                                 err(4, "%s", specname);
 597                         bzero((char *)lp, sizeof *lp);
 598                 }
 599                 return (lp);
 600         }
 601         /*
 602          * We are installing a boot program.  Determine the name(s) and
 603          * read them into the appropriate places in the boot area.
 604          */
 605         if (!xxboot || !bootxx) {
 606                 dkbasename = np;
 607                 if ((p = rindex(dkname, '/')) == NULL)
 608                         p = dkname;
 609                 else
 610                         p++;
 611                 while (*p && !isdigit(*p))
 612                         *np++ = *p++;
 613                 *np++ = '\0';
 614
 615                 if (!xxboot) {
 616                         (void)sprintf(boot0, "%s/boot1", _PATH_BOOTDIR);
 617                         xxboot = boot0;
 618                 }
 619 #if NUMBOOT > 1
 620                 if (!bootxx) {
 621                         (void)sprintf(boot1, "%s/boot2", _PATH_BOOTDIR);
 622                         bootxx = boot1;
 623                 }
 624 #endif
 625         }
 626
 627         /*
 628          * Strange rules:
 629          * 1. One-piece bootstrap (hp300/hp800)
 630          * 1. One-piece bootstrap (alpha/sparc64)
 631          *      up to d_bbsize bytes of ``xxboot'' go in bootarea, the rest
 632          *      is remembered and written later following the bootarea.
 633          * 2. Two-piece bootstraps (i386/ia64)
 634          *      up to d_secsize bytes of ``xxboot'' go in first d_secsize
 635          *      bytes of bootarea, remaining d_bbsize-d_secsize filled
 636          *      from ``bootxx''.
 637          */
 638         b = open(xxboot, O_RDONLY);
 639         if (b < 0)
 640                 err(4, "%s", xxboot);
 641 #if NUMBOOT > 1
 642 #ifdef __i386__
 643         /*
 644          * XXX Botch alert.
 645          * The i386 has the so-called fdisk table embedded into the
 646          * primary bootstrap.  We take care to not clobber it, but
 647          * only if it does already contain some data.  (Otherwise,
 648          * the xxboot provides a template.)
 649          */
 650         if ((tmpbuf = (char *)malloc((int)dp->d_secsize)) == 0)
 651                 err(4, "%s", xxboot);
 652         memcpy((void *)tmpbuf, (void *)boot, (int)dp->d_secsize);
 653 #endif /* __i386__ */
 654         if (read(b, boot, (int)dp->d_secsize) < 0)
 655                 err(4, "%s", xxboot);
 656         (void)close(b);
 657 #ifdef __i386__
 658         for (i = DOSPARTOFF, found = 0;
 659              !found && i < (int)(DOSPARTOFF + NDOSPART*sizeof(struct dos_partition));
 660              i++)
 661                 found = tmpbuf[i] != 0;
 662         if (found)
 663                 memcpy((void *)&boot[DOSPARTOFF],
 664                        (void *)&tmpbuf[DOSPARTOFF],
 665                        NDOSPART * sizeof(struct dos_partition));
 666         free(tmpbuf);
 667 #endif /* __i386__ */
 668         b = open(bootxx, O_RDONLY);
 669         if (b < 0)
 670                 err(4, "%s", bootxx);
 671         if (fstat(b, &sb) != 0)
 672                 err(4, "%s", bootxx);
 673         if (dp->d_secsize + sb.st_size > dp->d_bbsize)
 674                 errx(4, "%s too large", bootxx);
 675         if (read(b, &boot[dp->d_secsize],
 676                  (int)(dp->d_bbsize-dp->d_secsize)) < 0)
 677                 err(4, "%s", bootxx);
 678 #else /* !(NUMBOOT > 1) */
 679 #ifdef __alpha__
 680         /*
 681          * On the alpha, the primary bootstrap starts at the
 682          * second sector of the boot area.  The first sector
 683          * contains the label and must be edited to contain the
 684          * size and location of the primary bootstrap.
 685          */
 686         n = read(b, boot + dp->d_secsize, (int)dp->d_bbsize);
 687         if (n < 0)
 688                 err(4, "%s", xxboot);
 689         bootinfo = (u_long *)(boot + 480);
 690         bootinfo[0] = (n + dp->d_secsize - 1) / dp->d_secsize;
 691         bootinfo[1] = 1;        /* start at sector 1 */
 692         bootinfo[2] = 0;        /* flags (must be zero) */
 693 #else /* !__alpha__ */
 694         if (read(b, boot, (int)dp->d_bbsize) < 0)
 695                 err(4, "%s", xxboot);
 696 #endif /* __alpha__ */
 697         if (fstat(b, &sb) != 0)
 698                 err(4, "%s", xxboot);
 699         bootsize = (int)sb.st_size - dp->d_bbsize;
 700         if (bootsize > 0) {
 701                 /* XXX assume d_secsize is a power of two */
 702                 bootsize = (bootsize + dp->d_secsize-1) & ~(dp->d_secsize-1);
 703                 bootbuf = (char *)malloc((size_t)bootsize);
 704                 if (bootbuf == 0)
 705                         err(4, "%s", xxboot);
 706                 if (read(b, bootbuf, bootsize) < 0) {
 707                         free(bootbuf);
 708                         err(4, "%s", xxboot);
 709                 }
 710         }
 711 #endif /* NUMBOOT > 1 */
 712         (void)close(b);
 713 #endif /* NUMBOOT > 0 */
 714         /*
 715          * Make sure no part of the bootstrap is written in the area
 716          * reserved for the label.
 717          */
 718         for (p = (char *)lp; p < (char *)lp + sizeof(struct disklabel); p++)
 719                 if (*p)
 720                         errx(2, "bootstrap doesn't leave room for disk label");
 721         return (lp);
 722 }
 723
 724 void
 725 display(FILE *f, const struct disklabel *lp)
 726 {
 727         int i, j;
 728         const struct partition *pp;
 729
 730         fprintf(f, "# %s:\n", specname);
 731         if ((unsigned) lp->d_type < DKMAXTYPES)
 732                 fprintf(f, "type: %s\n", dktypenames[lp->d_type]);
 733         else
 734                 fprintf(f, "type: %u\n", lp->d_type);
 735         fprintf(f, "disk: %.*s\n", (int)sizeof(lp->d_typename),
 736                 lp->d_typename);
 737         fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname),
 738                 lp->d_packname);
 739         fprintf(f, "flags:");
 740         if (lp->d_flags & D_REMOVABLE)
 741                 fprintf(f, " removeable");
 742         if (lp->d_flags & D_ECC)
 743                 fprintf(f, " ecc");
 744         if (lp->d_flags & D_BADSECT)
 745                 fprintf(f, " badsect");
 746         fprintf(f, "\n");
 747         fprintf(f, "bytes/sector: %lu\n", (u_long)lp->d_secsize);
 748         fprintf(f, "sectors/track: %lu\n", (u_long)lp->d_nsectors);
 749         fprintf(f, "tracks/cylinder: %lu\n", (u_long)lp->d_ntracks);
 750         fprintf(f, "sectors/cylinder: %lu\n", (u_long)lp->d_secpercyl);
 751         fprintf(f, "cylinders: %lu\n", (u_long)lp->d_ncylinders);
 752         fprintf(f, "sectors/unit: %lu\n", (u_long)lp->d_secperunit);
 753         fprintf(f, "rpm: %u\n", lp->d_rpm);
 754         fprintf(f, "interleave: %u\n", lp->d_interleave);
 755         fprintf(f, "trackskew: %u\n", lp->d_trackskew);
 756         fprintf(f, "cylinderskew: %u\n", lp->d_cylskew);
 757         fprintf(f, "headswitch: %lu\t\t# milliseconds\n",
 758             (u_long)lp->d_headswitch);
 759         fprintf(f, "track-to-track seek: %ld\t# milliseconds\n",
 760             (u_long)lp->d_trkseek);
 761         fprintf(f, "drivedata: ");
 762         for (i = NDDATA - 1; i >= 0; i--)
 763                 if (lp->d_drivedata[i])
 764                         break;
 765         if (i < 0)
 766                 i = 0;
 767         for (j = 0; j <= i; j++)
 768                 fprintf(f, "%lu ", (u_long)lp->d_drivedata[j]);
 769         fprintf(f, "\n\n%u partitions:\n", lp->d_npartitions);
 770         fprintf(f,
 771             "#        size   offset    fstype   [fsize bsize bps/cpg]\n");
 772         pp = lp->d_partitions;
 773         for (i = 0; i < lp->d_npartitions; i++, pp++) {
 774                 if (pp->p_size) {
 775                         fprintf(f, "  %c: %8lu %8lu  ", 'a' + i,
 776                            (u_long)pp->p_size, (u_long)pp->p_offset);
 777                         if ((unsigned) pp->p_fstype < FSMAXTYPES)
 778                                 fprintf(f, "%8.8s", fstypenames[pp->p_fstype]);
 779                         else
 780                                 fprintf(f, "%8d", pp->p_fstype);
 781                         switch (pp->p_fstype) {
 782
 783                         case FS_UNUSED:                         /* XXX */
 784                                 fprintf(f, "    %5lu %5lu %5.5s ",
 785                                     (u_long)pp->p_fsize,
 786                                     (u_long)(pp->p_fsize * pp->p_frag), "");
 787                                 break;
 788
 789                         case FS_BSDFFS:
 790                                 fprintf(f, "    %5lu %5lu %5u ",
 791                                     (u_long)pp->p_fsize,
 792                                     (u_long)(pp->p_fsize * pp->p_frag),
 793                                     pp->p_cpg);
 794                                 break;
 795
 796                         case FS_BSDLFS:
 797                                 fprintf(f, "    %5lu %5lu %5d",
 798                                     (u_long)pp->p_fsize,
 799                                     (u_long)(pp->p_fsize * pp->p_frag),
 800                                     pp->p_cpg);
 801                                 break;
 802
 803                         default:
 804                                 fprintf(f, "%20.20s", "");
 805                                 break;
 806                         }
 807                         fprintf(f, "\t# (Cyl. %4lu",
 808                             (u_long)(pp->p_offset / lp->d_secpercyl));
 809                         if (pp->p_offset % lp->d_secpercyl)
 810                             putc('*', f);
 811                         else
 812                             putc(' ', f);
 813                         fprintf(f, "- %lu",
 814                             (u_long)((pp->p_offset + pp->p_size +
 815                             lp->d_secpercyl - 1) /
 816                             lp->d_secpercyl - 1));
 817                         if (pp->p_size % lp->d_secpercyl)
 818                             putc('*', f);
 819                         fprintf(f, ")\n");
 820                 }
 821         }
 822         fflush(f);
 823 }
 824
 825 int
 826 edit(struct disklabel *lp, int f)
 827 {
 828         int c, fd;
 829         struct disklabel label;
 830         FILE *fp;
 831
 832         if ((fd = mkstemp(tmpfil)) == -1 ||
 833             (fp = fdopen(fd, "w")) == NULL) {
 834                 warnx("can't create %s", tmpfil);
 835                 return (1);
 836         }
 837         display(fp, lp);
 838         fclose(fp);
 839         for (;;) {
 840                 if (!editit())
 841                         break;
 842                 fp = fopen(tmpfil, "r");
 843                 if (fp == NULL) {
 844                         warnx("can't reopen %s for reading", tmpfil);
 845                         break;
 846                 }
 847                 bzero((char *)&label, sizeof(label));
 848                 if (getasciilabel(fp, &label)) {
 849                         *lp = label;
 850                         if (writelabel(f, bootarea, lp) == 0) {
 851                                 fclose(fp);
 852                                 (void) unlink(tmpfil);
 853                                 return (0);
 854                         }
 855                 }
 856                 fclose(fp);
 857                 printf("re-edit the label? [y]: "); fflush(stdout);
 858                 c = getchar();
 859                 if (c != EOF && c != (int)'\n')
 860                         while (getchar() != (int)'\n')
 861                                 ;
 862                 if  (c == (int)'n')
 863                         break;
 864         }
 865         (void) unlink(tmpfil);
 866         return (1);
 867 }
 868
 869 int
 870 editit(void)
 871 {
 872         int pid, xpid;
 873         int locstat, omask;
 874         const char *ed;
 875
 876         omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP));
 877         while ((pid = fork()) < 0) {
 878                 if (errno == EPROCLIM) {
 879                         warnx("you have too many processes");
 880                         return(0);
 881                 }
 882                 if (errno != EAGAIN) {
 883                         warn("fork");
 884                         return(0);
 885                 }
 886                 sleep(1);
 887         }
 888         if (pid == 0) {
 889                 sigsetmask(omask);
 890                 setgid(getgid());
 891                 setuid(getuid());
 892                 if ((ed = getenv("EDITOR")) == (char *)0)
 893                         ed = DEFEDITOR;
 894                 execlp(ed, ed, tmpfil, (char *)0);
 895                 err(1, "%s", ed);
 896         }
 897         while ((xpid = wait(&locstat)) >= 0)
 898                 if (xpid == pid)
 899                         break;
 900         sigsetmask(omask);
 901         return(!locstat);
 902 }
 903
 904 char *
 905 skip(char *cp)
 906 {
 907
 908         while (*cp != '\0' && isspace(*cp))
 909                 cp++;
 910         if (*cp == '\0' || *cp == '#')
 911                 return (NULL);
 912         return (cp);
 913 }
 914
 915 char *
 916 word(char *cp)
 917 {
 918         char c;
 919
 920         while (*cp != '\0' && !isspace(*cp) && *cp != '#')
 921                 cp++;
 922         if ((c = *cp) != '\0') {
 923                 *cp++ = '\0';
 924                 if (c != '#')
 925                         return (skip(cp));
 926         }
 927         return (NULL);
 928 }
 929
 930 /*
 931  * Read an ascii label in from fd f,
 932  * in the same format as that put out by display(),
 933  * and fill in lp.
 934  */
 935 int
 936 getasciilabel(FILE *f, struct disklabel *lp)
 937 {
 938         char *cp;
 939         const char **cpp;
 940         unsigned int part;
 941         char *tp, line[BUFSIZ];
 942         int v, lineno = 0, errors = 0;
 943         int i;
 944
 945         lp->d_bbsize = BBSIZE;                          /* XXX */
 946         lp->d_sbsize = 0;                               /* XXX */
 947         while (fgets(line, sizeof(line) - 1, f)) {
 948                 lineno++;
 949                 if ((cp = index(line,'\n')) != 0)
 950                         *cp = '\0';
 951                 cp = skip(line);
 952                 if (cp == NULL)
 953                         continue;
 954                 tp = index(cp, ':');
 955                 if (tp == NULL) {
 956                         fprintf(stderr, "line %d: syntax error\n", lineno);
 957                         errors++;
 958                         continue;
 959                 }
 960                 *tp++ = '\0', tp = skip(tp);
 961                 if (streq(cp, "type")) {
 962                         if (tp == NULL)
 963                                 tp = unknown;
 964                         cpp = dktypenames;
 965                         for (; cpp < &dktypenames[DKMAXTYPES]; cpp++)
 966                                 if (*cpp && streq(*cpp, tp)) {
 967                                         lp->d_type = cpp - dktypenames;
 968                                         break;
 969                                 }
 970                         if (cpp < &dktypenames[DKMAXTYPES])
 971                                 continue;
 972                         v = atoi(tp);
 973                         if ((unsigned)v >= DKMAXTYPES)
 974                                 fprintf(stderr, "line %d:%s %d\n", lineno,
 975                                     "Warning, unknown disk type", v);
 976                         lp->d_type = v;
 977                         continue;
 978                 }
 979                 if (streq(cp, "flags")) {
 980                         for (v = 0; (cp = tp) && *cp != '\0';) {
 981                                 tp = word(cp);
 982                                 if (streq(cp, "removeable"))
 983                                         v |= D_REMOVABLE;
 984                                 else if (streq(cp, "ecc"))
 985                                         v |= D_ECC;
 986                                 else if (streq(cp, "badsect"))
 987                                         v |= D_BADSECT;
 988                                 else {
 989                                         fprintf(stderr,
 990                                             "line %d: %s: bad flag\n",
 991                                             lineno, cp);
 992                                         errors++;
 993                                 }
 994                         }
 995                         lp->d_flags = v;
 996                         continue;
 997                 }
 998                 if (streq(cp, "drivedata")) {
 999                         for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA;) {
1000                                 lp->d_drivedata[i++] = atoi(cp);
1001                                 tp = word(cp);
1002                         }
1003                         continue;
1004                 }
1005                 if (sscanf(cp, "%d partitions", &v) == 1) {
1006                         if (v == 0 || (unsigned)v > MAXPARTITIONS) {
1007                                 fprintf(stderr,
1008                                     "line %d: bad # of partitions\n", lineno);
1009                                 lp->d_npartitions = MAXPARTITIONS;
1010                                 errors++;
1011                         } else
1012                                 lp->d_npartitions = v;
1013                         continue;
1014                 }
1015                 if (tp == NULL)
1016                         tp = blank;
1017                 if (streq(cp, "disk")) {
1018                         strncpy(lp->d_typename, tp, sizeof (lp->d_typename));
1019                         continue;
1020                 }
1021                 if (streq(cp, "label")) {
1022                         strncpy(lp->d_packname, tp, sizeof (lp->d_packname));
1023                         continue;
1024                 }
1025                 if (streq(cp, "bytes/sector")) {
1026                         v = atoi(tp);
1027                         if (v <= 0 || (v % DEV_BSIZE) != 0) {
1028                                 fprintf(stderr,
1029                                     "line %d: %s: bad sector size\n",
1030                                     lineno, tp);
1031                                 errors++;
1032                         } else
1033                                 lp->d_secsize = v;
1034                         continue;
1035                 }
1036                 if (streq(cp, "sectors/track")) {
1037                         v = atoi(tp);
1038                         if (v <= 0) {
1039                                 fprintf(stderr, "line %d: %s: bad %s\n",
1040                                     lineno, tp, cp);
1041                                 errors++;
1042                         } else
1043                                 lp->d_nsectors = v;
1044                         continue;
1045                 }
1046                 if (streq(cp, "sectors/cylinder")) {
1047                         v = atoi(tp);
1048                         if (v <= 0) {
1049                                 fprintf(stderr, "line %d: %s: bad %s\n",
1050                                     lineno, tp, cp);
1051                                 errors++;
1052                         } else
1053                                 lp->d_secpercyl = v;
1054                         continue;
1055                 }
1056                 if (streq(cp, "tracks/cylinder")) {
1057                         v = atoi(tp);
1058                         if (v <= 0) {
1059                                 fprintf(stderr, "line %d: %s: bad %s\n",
1060                                     lineno, tp, cp);
1061                                 errors++;
1062                         } else
1063                                 lp->d_ntracks = v;
1064                         continue;
1065                 }
1066                 if (streq(cp, "cylinders")) {
1067                         v = atoi(tp);
1068                         if (v <= 0) {
1069                                 fprintf(stderr, "line %d: %s: bad %s\n",
1070                                     lineno, tp, cp);
1071                                 errors++;
1072                         } else
1073                                 lp->d_ncylinders = v;
1074                         continue;
1075                 }
1076                 if (streq(cp, "sectors/unit")) {
1077                         v = atoi(tp);
1078                         if (v <= 0) {
1079                                 fprintf(stderr, "line %d: %s: bad %s\n",
1080                                     lineno, tp, cp);
1081                                 errors++;
1082                         } else
1083                                 lp->d_secperunit = v;
1084                         continue;
1085                 }
1086                 if (streq(cp, "rpm")) {
1087                         v = atoi(tp);
1088                         if (v <= 0) {
1089                                 fprintf(stderr, "line %d: %s: bad %s\n",
1090                                     lineno, tp, cp);
1091                                 errors++;
1092                         } else
1093                                 lp->d_rpm = v;
1094                         continue;
1095                 }
1096                 if (streq(cp, "interleave")) {
1097                         v = atoi(tp);
1098                         if (v <= 0) {
1099                                 fprintf(stderr, "line %d: %s: bad %s\n",
1100                                     lineno, tp, cp);
1101                                 errors++;
1102                         } else
1103                                 lp->d_interleave = v;
1104                         continue;
1105                 }
1106                 if (streq(cp, "trackskew")) {
1107                         v = atoi(tp);
1108                         if (v < 0) {
1109                                 fprintf(stderr, "line %d: %s: bad %s\n",
1110                                     lineno, tp, cp);
1111                                 errors++;
1112                         } else
1113                                 lp->d_trackskew = v;
1114                         continue;
1115                 }
1116                 if (streq(cp, "cylinderskew")) {
1117                         v = atoi(tp);
1118                         if (v < 0) {
1119                                 fprintf(stderr, "line %d: %s: bad %s\n",
1120                                     lineno, tp, cp);
1121                                 errors++;
1122                         } else
1123                                 lp->d_cylskew = v;
1124                         continue;
1125                 }
1126                 if (streq(cp, "headswitch")) {
1127                         v = atoi(tp);
1128                         if (v < 0) {
1129                                 fprintf(stderr, "line %d: %s: bad %s\n",
1130                                     lineno, tp, cp);
1131                                 errors++;
1132                         } else
1133                                 lp->d_headswitch = v;
1134                         continue;
1135                 }
1136                 if (streq(cp, "track-to-track seek")) {
1137                         v = atoi(tp);
1138                         if (v < 0) {
1139                                 fprintf(stderr, "line %d: %s: bad %s\n",
1140                                     lineno, tp, cp);
1141                                 errors++;
1142                         } else
1143                                 lp->d_trkseek = v;
1144                         continue;
1145                 }
1146                 /* the ':' was removed above */
1147                 if (*cp < 'a' || *cp > MAX_PART || cp[1] != '\0') {
1148                         fprintf(stderr,
1149                             "line %d: %s: Unknown disklabel field\n", lineno,
1150                             cp);
1151                         errors++;
1152                         continue;
1153                 }
1154
1155                 /* Process a partition specification line. */
1156                 part = *cp - 'a';
1157                 if (part >= lp->d_npartitions) {
1158                         fprintf(stderr,
1159                             "line %d: partition name out of range a-%c: %s\n",
1160                             lineno, 'a' + lp->d_npartitions - 1, cp);
1161                         errors++;
1162                         continue;
1163                 }
1164                 part_set[part] = 1;
1165
1166                 if (getasciipartspec(tp, lp, part, lineno) != 0) {
1167                         errors++;
1168                         break;
1169                 }
1170         }
1171         errors += checklabel(lp);
1172         return (errors == 0);
1173 }
1174
1175 #define NXTNUM(n) do { \
1176         if (tp == NULL) { \
1177                 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \
1178                 return (1); \
1179         } else { \
1180                 cp = tp, tp = word(cp); \
1181                 (n) = atoi(cp); \
1182         } \
1183 } while (0)
1184
1185 /* retain 1 character following number */
1186 #define NXTWORD(w,n) do { \
1187         if (tp == NULL) { \
1188                 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \
1189                 return (1); \
1190         } else { \
1191                 char *tmp; \
1192                 cp = tp, tp = word(cp); \
1193                 (n) = strtol(cp,&tmp,10); \
1194                 if (tmp) (w) = *tmp; \
1195         } \
1196 } while (0)
1197
1198 /*
1199  * Read a partition line into partition `part' in the specified disklabel.
1200  * Return 0 on success, 1 on failure.
1201  */
1202 int
1203 getasciipartspec(char *tp, struct disklabel *lp, int part, int lineno)
1204 {
1205         struct partition *pp;
1206         char *cp;
1207         const char **cpp;
1208         int v;
1209
1210         pp = &lp->d_partitions[part];
1211         cp = NULL;
1212
1213         v = 0;
1214         NXTWORD(part_size_type[part],v);
1215         if (v < 0 || (v == 0 && part_size_type[part] != '*')) {
1216                 fprintf(stderr, "line %d: %s: bad partition size\n", lineno,
1217                     cp);
1218                 return (1);
1219         }
1220         pp->p_size = v;
1221
1222         v = 0;
1223         NXTWORD(part_offset_type[part],v);
1224         if (v < 0 || (v == 0 && part_offset_type[part] != '*' &&
1225             part_offset_type[part] != '\0')) {
1226                 fprintf(stderr, "line %d: %s: bad partition offset\n", lineno,
1227                     cp);
1228                 return (1);
1229         }
1230         pp->p_offset = v;
1231         cp = tp, tp = word(cp);
1232         for (cpp = fstypenames; cpp < &fstypenames[FSMAXTYPES]; cpp++)
1233                 if (*cpp && streq(*cpp, cp))
1234                         break;
1235         if (*cpp != NULL) {
1236                 pp->p_fstype = cpp - fstypenames;
1237         } else {
1238                 if (isdigit(*cp))
1239                         v = atoi(cp);
1240                 else
1241                         v = FSMAXTYPES;
1242                 if ((unsigned)v >= FSMAXTYPES) {
1243                         fprintf(stderr,
1244                             "line %d: Warning, unknown file system type %s\n",
1245                             lineno, cp);
1246                         v = FS_UNUSED;
1247                 }
1248                 pp->p_fstype = v;
1249         }
1250
1251         switch (pp->p_fstype) {
1252         case FS_UNUSED:
1253                 /*
1254                  * allow us to accept defaults for
1255                  * fsize/frag/cpg
1256                  */
1257                 if (tp) {
1258                         NXTNUM(pp->p_fsize);
1259                         if (pp->p_fsize == 0)
1260                                 break;
1261                         NXTNUM(v);
1262                         pp->p_frag = v / pp->p_fsize;
1263                 }
1264                 /* else default to 0's */
1265                 break;
1266
1267         /* These happen to be the same */
1268         case FS_BSDFFS:
1269         case FS_BSDLFS:
1270                 if (tp) {
1271                         NXTNUM(pp->p_fsize);
1272                         if (pp->p_fsize == 0)
1273                                 break;
1274                         NXTNUM(v);
1275                         pp->p_frag = v / pp->p_fsize;
1276                         NXTNUM(pp->p_cpg);
1277                 } else {
1278                         /*
1279                          * FIX! poor attempt at adaptive
1280                          */
1281                         /* 1 GB */
1282                         if (pp->p_size < 1024*1024*1024 / lp->d_secsize) {
1283                                 /*
1284                                  * FIX! These are too low, but are traditional
1285                                  */
1286                                 pp->p_fsize = DEFAULT_NEWFS_FRAG;
1287                                 pp->p_frag = DEFAULT_NEWFS_BLOCK /
1288                                     DEFAULT_NEWFS_FRAG;
1289                                 pp->p_cpg = DEFAULT_NEWFS_CPG;
1290                         } else {
1291                                 pp->p_fsize = BIG_NEWFS_FRAG;
1292                                 pp->p_frag = BIG_NEWFS_BLOCK /
1293                                     BIG_NEWFS_FRAG;
1294                                 pp->p_cpg = BIG_NEWFS_CPG;
1295                         }
1296                 }
1297         default:
1298                 break;
1299         }
1300         return (0);
1301 }
1302
1303 /*
1304  * Check disklabel for errors and fill in
1305  * derived fields according to supplied values.
1306  */
1307 int
1308 checklabel(struct disklabel *lp)
1309 {
1310         struct partition *pp;
1311         int i, errors = 0;
1312         char part;
1313         unsigned long total_size, total_percent, current_offset;
1314         int seen_default_offset;
1315         int hog_part;
1316         int j;
1317         struct partition *pp2;
1318
1319         if (lp->d_secsize == 0) {
1320                 fprintf(stderr, "sector size 0\n");
1321                 return (1);
1322         }
1323         if (lp->d_nsectors == 0) {
1324                 fprintf(stderr, "sectors/track 0\n");
1325                 return (1);
1326         }
1327         if (lp->d_ntracks == 0) {
1328                 fprintf(stderr, "tracks/cylinder 0\n");
1329                 return (1);
1330         }
1331         if  (lp->d_ncylinders == 0) {
1332                 fprintf(stderr, "cylinders/unit 0\n");
1333                 errors++;
1334         }
1335         if (lp->d_rpm == 0)
1336                 Warning("revolutions/minute 0");
1337         if (lp->d_secpercyl == 0)
1338                 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks;
1339         if (lp->d_secperunit == 0)
1340                 lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders;
1341         if (lp->d_bbsize == 0) {
1342                 fprintf(stderr, "boot block size 0\n");
1343                 errors++;
1344         } else if (lp->d_bbsize % lp->d_secsize)
1345                 Warning("boot block size %% sector-size != 0");
1346         if (lp->d_npartitions > MAXPARTITIONS)
1347                 Warning("number of partitions (%lu) > MAXPARTITIONS (%d)",
1348                     (u_long)lp->d_npartitions, MAXPARTITIONS);
1349
1350         /* first allocate space to the partitions, then offsets */
1351         total_size = 0; /* in sectors */
1352         total_percent = 0; /* in percent */
1353         hog_part = -1;
1354         /* find all fixed partitions */
1355         for (i = 0; i < lp->d_npartitions; i++) {
1356                 pp = &lp->d_partitions[i];
1357                 if (part_set[i]) {
1358                         if (part_size_type[i] == '*') {
1359                                 if (i == RAW_PART) {
1360                                         pp->p_size = lp->d_secperunit;
1361                                 } else {
1362                                         if (hog_part != -1)
1363                                                 Warning("Too many '*' partitions (%c and %c)",
1364                                                     hog_part + 'a',i + 'a');
1365                                         else
1366                                                 hog_part = i;
1367                                 }
1368                         } else {
1369                                 off_t size;
1370
1371                                 size = pp->p_size;
1372                                 switch (part_size_type[i]) {
1373                                 case '%':
1374                                         total_percent += size;
1375                                         break;
1376                                 case 'k':
1377                                 case 'K':
1378                                         size *= 1024ULL;
1379                                         break;
1380                                 case 'm':
1381                                 case 'M':
1382                                         size *= 1024ULL * 1024ULL;
1383                                         break;
1384                                 case 'g':
1385                                 case 'G':
1386                                         size *= 1024ULL * 1024ULL * 1024ULL;
1387                                         break;
1388                                 case '\0':
1389                                         break;
1390                                 default:
1391                                         Warning("unknown size specifier '%c' (K/M/G are valid)",part_size_type[i]);
1392                                         break;
1393                                 }
1394                                 /* don't count %'s yet */
1395                                 if (part_size_type[i] != '%') {
1396                                         /*
1397                                          * for all not in sectors, convert to
1398                                          * sectors
1399                                          */
1400                                         if (part_size_type[i] != '\0') {
1401                                                 if (size % lp->d_secsize != 0)
1402                                                         Warning("partition %c not an integer number of sectors",
1403                                                             i + 'a');
1404                                                 size /= lp->d_secsize;
1405                                                 pp->p_size = size;
1406                                         }
1407                                         /* else already in sectors */
1408                                         if (i != RAW_PART)
1409                                                 total_size += size;
1410                                 }
1411                         }
1412                 }
1413         }
1414         /* handle % partitions - note %'s don't need to add up to 100! */
1415         if (total_percent != 0) {
1416                 long free_space = lp->d_secperunit - total_size;
1417                 if (total_percent > 100) {
1418                         fprintf(stderr,"total percentage %lu is greater than 100\n",
1419                             total_percent);
1420                         errors++;
1421                 }
1422
1423                 if (free_space > 0) {
1424                         for (i = 0; i < lp->d_npartitions; i++) {
1425                                 pp = &lp->d_partitions[i];
1426                                 if (part_set[i] && part_size_type[i] == '%') {
1427                                         /* careful of overflows! and integer roundoff */
1428                                         pp->p_size = ((double)pp->p_size/100) * free_space;
1429                                         total_size += pp->p_size;
1430
1431                                         /* FIX we can lose a sector or so due to roundoff per
1432                                            partition.  A more complex algorithm could avoid that */
1433                                 }
1434                         }
1435                 } else {
1436                         fprintf(stderr,
1437                             "%ld sectors available to give to '*' and '%%' partitions\n",
1438                             free_space);
1439                         errors++;
1440                         /* fix?  set all % partitions to size 0? */
1441                 }
1442         }
1443         /* give anything remaining to the hog partition */
1444         if (hog_part != -1) {
1445                 lp->d_partitions[hog_part].p_size = lp->d_secperunit - total_size;
1446                 total_size = lp->d_secperunit;
1447         }
1448
1449         /* Now set the offsets for each partition */
1450         current_offset = 0; /* in sectors */
1451         seen_default_offset = 0;
1452         for (i = 0; i < lp->d_npartitions; i++) {
1453                 part = 'a' + i;
1454                 pp = &lp->d_partitions[i];
1455                 if (part_set[i]) {
1456                         if (part_offset_type[i] == '*') {
1457                                 if (i == RAW_PART) {
1458                                         pp->p_offset = 0;
1459                                 } else {
1460                                         pp->p_offset = current_offset;
1461                                         seen_default_offset = 1;
1462                                 }
1463                         } else {
1464                                 /* allow them to be out of order for old-style tables */
1465                                 if (pp->p_offset < current_offset &&
1466                                     seen_default_offset && i != RAW_PART) {
1467                                         fprintf(stderr,
1468 "Offset %ld for partition %c overlaps previous partition which ends at %lu\n",
1469                                             (long)pp->p_offset,i+'a',current_offset);
1470                                         fprintf(stderr,
1471 "Labels with any *'s for offset must be in ascending order by sector\n");
1472                                         errors++;
1473                                 } else if (pp->p_offset != current_offset &&
1474                                     i != RAW_PART && seen_default_offset) {
1475                                         /*
1476                                          * this may give unneeded warnings if
1477                                          * partitions are out-of-order
1478                                          */
1479                                         Warning(
1480 "Offset %ld for partition %c doesn't match expected value %ld",
1481                                             (long)pp->p_offset, i + 'a', current_offset);
1482                                 }
1483                         }
1484                         if (i != RAW_PART)
1485                                 current_offset = pp->p_offset + pp->p_size;
1486                 }
1487         }
1488
1489         for (i = 0; i < lp->d_npartitions; i++) {
1490                 part = 'a' + i;
1491                 pp = &lp->d_partitions[i];
1492                 if (pp->p_size == 0 && pp->p_offset != 0)
1493                         Warning("partition %c: size 0, but offset %lu",
1494                             part, (u_long)pp->p_offset);
1495 #ifdef __sparc64__
1496                 /* See comment in writelabel(). */
1497                 if (pp->p_offset % lp->d_secpercyl != 0) {
1498                         fprintf(stderr, "partition %c: does not start on a "
1499                             "cylinder boundary!\n", part);
1500                         errors++;
1501                 }
1502 #endif
1503 #ifdef notdef
1504                 if (pp->p_size % lp->d_secpercyl)
1505                         Warning("partition %c: size %% cylinder-size != 0",
1506                             part);
1507                 if (pp->p_offset % lp->d_secpercyl)
1508                         Warning("partition %c: offset %% cylinder-size != 0",
1509                             part);
1510 #endif
1511                 if (pp->p_offset > lp->d_secperunit) {
1512                         fprintf(stderr,
1513                             "partition %c: offset past end of unit\n", part);
1514                         errors++;
1515                 }
1516                 if (pp->p_offset + pp->p_size > lp->d_secperunit) {
1517                         fprintf(stderr,
1518                         "partition %c: partition extends past end of unit\n",
1519                             part);
1520                         errors++;
1521                 }
1522                 if (i == RAW_PART)
1523                 {
1524                         if (pp->p_fstype != FS_UNUSED)
1525                                 Warning("partition %c is not marked as unused!",part);
1526                         if (pp->p_offset != 0)
1527                                 Warning("partition %c doesn't start at 0!",part);
1528                         if (pp->p_size != lp->d_secperunit)
1529                                 Warning("partition %c doesn't cover the whole unit!",part);
1530
1531                         if ((pp->p_fstype != FS_UNUSED) || (pp->p_offset != 0) ||
1532                             (pp->p_size != lp->d_secperunit)) {
1533                                 Warning("An incorrect partition %c may cause problems for "
1534                                     "standard system utilities",part);
1535                         }
1536                 }
1537
1538                 /* check for overlaps */
1539                 /* this will check for all possible overlaps once and only once */
1540                 for (j = 0; j < i; j++) {
1541                         if (j != RAW_PART && i != RAW_PART &&
1542                             part_set[i] && part_set[j]) {
1543                                 pp2 = &lp->d_partitions[j];
1544                                 if (pp2->p_offset < pp->p_offset + pp->p_size &&
1545                                     (pp2->p_offset + pp2->p_size > pp->p_offset ||
1546                                         pp2->p_offset >= pp->p_offset)) {
1547                                         fprintf(stderr,"partitions %c and %c overlap!\n",
1548                                             j + 'a', i + 'a');
1549                                         errors++;
1550                                 }
1551                         }
1552                 }
1553         }
1554         for (; i < MAXPARTITIONS; i++) {
1555                 part = 'a' + i;
1556                 pp = &lp->d_partitions[i];
1557                 if (pp->p_size || pp->p_offset)
1558                         Warning("unused partition %c: size %d offset %lu",
1559                             'a' + i, pp->p_size, (u_long)pp->p_offset);
1560         }
1561         return (errors);
1562 }
1563
1564 /*
1565  * When operating on a "virgin" disk, try getting an initial label
1566  * from the associated device driver.  This might work for all device
1567  * drivers that are able to fetch some initial device parameters
1568  * without even having access to a (BSD) disklabel, like SCSI disks,
1569  * most IDE drives, or vn devices.
1570  *
1571  * The device name must be given in its "canonical" form.
1572  */
1573 struct disklabel *
1574 getvirginlabel(void)
1575 {
1576         static struct disklabel loclab;
1577         struct partition *dp;
1578         char lnamebuf[BBSIZE];
1579         int f;
1580         u_int secsize, u;
1581         off_t mediasize;
1582
1583         if (dkname[0] == '/') {
1584                 warnx("\"auto\" requires the usage of a canonical disk name");
1585                 return (NULL);
1586         }
1587         (void)snprintf(lnamebuf, BBSIZE, "%s%s", _PATH_DEV, dkname);
1588         if ((f = open(lnamebuf, O_RDONLY)) == -1) {
1589                 warn("cannot open %s", lnamebuf);
1590                 return (NULL);
1591         }
1592
1593         /* New world order */
1594         if ((ioctl(f, DIOCGMEDIASIZE, &mediasize) != 0) ||
1595             (ioctl(f, DIOCGSECTORSIZE, &secsize) != 0)) {
1596                 close (f);
1597                 return (NULL);
1598         }
1599         memset(&loclab, 0, sizeof loclab);
1600         loclab.d_magic = DISKMAGIC;
1601         loclab.d_magic2 = DISKMAGIC;
1602         loclab.d_secsize = secsize;
1603         loclab.d_secperunit = mediasize / secsize;
1604
1605         /*
1606          * Nobody in these enligthened days uses the CHS geometry for
1607          * anything, but nontheless try to get it right.  If we fail
1608          * to get any good ideas from the device, construct something
1609          * which is IBM-PC friendly.
1610          */
1611         if (ioctl(f, DIOCGFWSECTORS, &u) == 0)
1612                 loclab.d_nsectors = u;
1613         else
1614                 loclab.d_nsectors = 63;
1615         if (ioctl(f, DIOCGFWHEADS, &u) == 0)
1616                 loclab.d_ntracks = u;
1617         else if (loclab.d_secperunit <= 63*1*1024)
1618                 loclab.d_ntracks = 1;
1619         else if (loclab.d_secperunit <= 63*16*1024)
1620                 loclab.d_ntracks = 16;
1621         else
1622                 loclab.d_ntracks = 255;
1623         loclab.d_secpercyl = loclab.d_ntracks * loclab.d_nsectors;
1624         loclab.d_ncylinders = loclab.d_secperunit / loclab.d_secpercyl;
1625         loclab.d_npartitions = MAXPARTITIONS;
1626
1627         /* Various (unneeded) compat stuff */
1628         loclab.d_rpm = 3600;
1629         loclab.d_bbsize = BBSIZE;
1630         loclab.d_interleave = 1;;
1631         strncpy(loclab.d_typename, "amnesiac",
1632             sizeof(loclab.d_typename));
1633
1634         dp = &loclab.d_partitions[RAW_PART];
1635         dp->p_size = loclab.d_secperunit;
1636         loclab.d_checksum = dkcksum(&loclab);
1637         close (f);
1638         return (&loclab);
1639 }
1640
1641 /*
1642  * If we are installing a boot program that doesn't fit in d_bbsize
1643  * we need to mark those partitions that the boot overflows into.
1644  * This allows newfs to prevent creation of a file system where it might
1645  * clobber bootstrap code.
1646  */
1647 void
1648 setbootflag(struct disklabel *lp)
1649 {
1650         struct partition *pp;
1651         int i, errors = 0;
1652         char part;
1653         u_long boffset;
1654
1655         if (bootbuf == 0)
1656                 return;
1657         boffset = bootsize / lp->d_secsize;
1658         for (i = 0; i < lp->d_npartitions; i++) {
1659                 part = 'a' + i;
1660                 pp = &lp->d_partitions[i];
1661                 if (pp->p_size == 0)
1662                         continue;
1663                 if (boffset <= pp->p_offset) {
1664                         if (pp->p_fstype == FS_BOOT)
1665                                 pp->p_fstype = FS_UNUSED;
1666                 } else if (pp->p_fstype != FS_BOOT) {
1667                         if (pp->p_fstype != FS_UNUSED) {
1668                                 fprintf(stderr,
1669                                         "boot overlaps used partition %c\n",
1670                                         part);
1671                                 errors++;
1672                         } else {
1673                                 pp->p_fstype = FS_BOOT;
1674                                 Warning("boot overlaps partition %c, %s",
1675                                         part, "marked as FS_BOOT");
1676                         }
1677                 }
1678         }
1679         if (errors)
1680                 errx(4, "cannot install boot program");
1681 }
1682
1683 /*VARARGS1*/
1684 void
1685 Warning(const char *fmt, ...)
1686 {
1687         va_list ap;
1688
1689         fprintf(stderr, "Warning, ");
1690         va_start(ap, fmt);
1691         vfprintf(stderr, fmt, ap);
1692         fprintf(stderr, "\n");
1693         va_end(ap);
1694 }
1695
1696 void
1697 usage(void)
1698 {
1699 #if NUMBOOT > 0
1700         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",
1701                 "usage: disklabel [-r] disk",
1702                 "\t\t(to read label)",
1703                 "       disklabel -w [-r] [-n] disk type [ packid ]",
1704                 "\t\t(to write label with existing boot program)",
1705                 "       disklabel -e [-r] [-n] disk",
1706                 "\t\t(to edit label)",
1707                 "       disklabel -R [-r] [-n] disk protofile",
1708                 "\t\t(to restore label with existing boot program)",
1709 #if NUMBOOT > 1
1710                 "       disklabel -B [-n] [ -b boot1 [ -s boot2 ] ] disk [ type ]",
1711                 "\t\t(to install boot program with existing label)",
1712                 "       disklabel -w -B [-n] [ -b boot1 [ -s boot2 ] ] disk type [ packid ]",
1713                 "\t\t(to write label and boot program)",
1714                 "       disklabel -R -B [-n] [ -b boot1 [ -s boot2 ] ] disk protofile [ type ]",
1715                 "\t\t(to restore label and boot program)",
1716 #else
1717                 "       disklabel -B [-n] [ -b bootprog ] disk [ type ]",
1718                 "\t\t(to install boot program with existing on-disk label)",
1719                 "       disklabel -w -B [-n] [ -b bootprog ] disk type [ packid ]",
1720                 "\t\t(to write label and install boot program)",
1721                 "       disklabel -R -B [-n] [ -b bootprog ] disk protofile [ type ]",
1722                 "\t\t(to restore label and install boot program)",
1723 #endif
1724                 "       disklabel [-NW] disk",
1725                 "\t\t(to write disable/enable label)");
1726 #else
1727         fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
1728                 "usage: disklabel [-r] disk", "(to read label)",
1729                 "       disklabel -w [-r] [-n] disk type [ packid ]",
1730                 "\t\t(to write label)",
1731                 "       disklabel -e [-r] [-n] disk",
1732                 "\t\t(to edit label)",
1733                 "       disklabel -R [-r] [-n] disk protofile",
1734                 "\t\t(to restore label)",
1735                 "       disklabel [-NW] disk",
1736                 "\t\t(to write disable/enable label)");
1737 #endif
1738         exit(1);
1739 }