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 #if 0
  44 #ifndef lint
  45 static const char copyright[] =
  46 "@(#) Copyright (c) 1987, 1993\n\
  47         The Regents of the University of California.  All rights reserved.\n";
  48 #endif /* not lint */
  49
  50 #ifndef lint
  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 /* not lint */
  54 #endif
  55 #include <sys/cdefs.h>
  56 __FBSDID("$FreeBSD$");
  57
  58 #include <sys/param.h>
  59 #include <stdint.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 #define MAXPARTITIONS   26
  67 #include <sys/disklabel.h>
  68
  69 #include <unistd.h>
  70 #include <string.h>
  71 #include <stdio.h>
  72 #include <libgeom.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 static void     makelabel(const char *, struct disklabel *);
  83 static int      geom_bsd_available(void);
  84 static int      writelabel(void);
  85 static int      readlabel(int flag);
  86 static void     display(FILE *, const struct disklabel *);
  87 static int      edit(void);
  88 static int      editit(void);
  89 static void     fixlabel(struct disklabel *);
  90 static char     *skip(char *);
  91 static char     *word(char *);
  92 static int      getasciilabel(FILE *, struct disklabel *);
  93 static int      getasciipartspec(char *, struct disklabel *, int, int);
  94 static int      checklabel(struct disklabel *);
  95 static void     usage(void);
  96 static struct disklabel *getvirginlabel(void);
  97
  98 #define DEFEDITOR       _PATH_VI
  99 #define DEFPARTITIONS   8
 100
 101 static char     *specname;
 102 static char     *pname;
 103 static char     tmpfil[] = PATH_TMPFILE;
 104
 105 static struct   disklabel lab;
 106 static u_char   bootarea[BBSIZE];
 107 static off_t    mediasize;
 108 static ssize_t  secsize;
 109 static char     blank[] = "";
 110 static char     unknown[] = "unknown";
 111
 112 #define MAX_PART ('z')
 113 #define MAX_NUM_PARTS (1 + MAX_PART - 'a')
 114 static char    part_size_type[MAX_NUM_PARTS];
 115 static char    part_offset_type[MAX_NUM_PARTS];
 116 static int     part_set[MAX_NUM_PARTS];
 117
 118 static int      installboot;    /* non-zero if we should install a boot program */
 119 static int      allfields;      /* present all fields in edit */
 120 static char const *xxboot;      /* primary boot */
 121
 122 static uint32_t lba_offset;
 123 #ifndef LABELSECTOR
 124 #define LABELSECTOR -1
 125 #endif
 126 #ifndef LABELOFFSET
 127 #define LABELOFFSET -1
 128 #endif
 129 static int labelsoffset = LABELSECTOR;
 130 static int labeloffset = LABELOFFSET;
 131 static int bbsize = BBSIZE;
 132
 133 enum    {
 134         UNSPEC, EDIT, READ, RESTORE, WRITE, WRITEBOOT
 135 } op = UNSPEC;
 136
 137
 138 static int      disable_write;   /* set to disable writing to disk label */
 139 static int      is_file;        /* work on a file (abs. pathname), "-f" opt. */
 140
 141 int
 142 main(int argc, char *argv[])
 143 {
 144         FILE *t;
 145         int ch, error, fd;
 146         const char *name;
 147
 148         error = 0;
 149         name = NULL;
 150
 151         while ((ch = getopt(argc, argv, "ABb:efm:nRrw")) != -1)
 152                 switch (ch) {
 153                         case 'A':
 154                                 allfields = 1;
 155                                 break;
 156                         case 'B':
 157                                 ++installboot;
 158                                 break;
 159                         case 'b':
 160                                 xxboot = optarg;
 161                                 break;
 162                         case 'f':
 163                                 is_file=1;
 164                                 break;
 165                         case 'm':
 166                                 if (!strcmp(optarg, "i386") ||
 167                                     !strcmp(optarg, "amd64") ||
 168                                     !strcmp(optarg, "ia64") ||
 169                                     !strcmp(optarg, "pc98")) {
 170                                         labelsoffset = 1;
 171                                         labeloffset = 0;
 172                                         bbsize = 8192;
 173                                 } else {
 174                                         errx(1, "Unsupported architecture");
 175                                 }
 176                                 break;
 177                         case 'n':
 178                                 disable_write = 1;
 179                                 break;
 180                         case 'R':
 181                                 if (op != UNSPEC)
 182                                         usage();
 183                                 op = RESTORE;
 184                                 break;
 185                         case 'e':
 186                                 if (op != UNSPEC)
 187                                         usage();
 188                                 op = EDIT;
 189                                 break;
 190                         case 'r':
 191                                 /*
 192                                  * We accept and ignode -r for compatibility with
 193                                  * historically disklabel usage.
 194                                  */
 195                                 break;
 196                         case 'w':
 197                                 if (op != UNSPEC)
 198                                         usage();
 199                                 op = WRITE;
 200                                 break;
 201                         case '?':
 202                         default:
 203                                 usage();
 204                 }
 205         argc -= optind;
 206         argv += optind;
 207
 208         if (argc < 1)
 209                 usage();
 210         if (labelsoffset < 0 || labeloffset < 0)
 211                 errx(1, "a -m <architecture> option must be specified");
 212
 213         /* Figure out the names of the thing we're working on */
 214         if (is_file) {
 215                 specname = argv[0];
 216         } else {
 217                 specname = g_device_path(argv[0]);
 218                 if (specname == NULL) {
 219                         warn("unable to get correct path for %s", argv[0]);
 220                         return(1);
 221                 }
 222                 fd = open(specname, O_RDONLY);
 223                 if (fd < 0) {
 224                         warn("error opening %s", specname);
 225                         return(1);
 226                 }
 227                 pname = g_providername(fd);
 228                 if (pname == NULL) {
 229                         warn("error getting providername for %s", specname);
 230                         close(fd);
 231                         return(1);
 232                 }
 233                 close(fd);
 234         }
 235
 236         if (installboot && op == UNSPEC)
 237                 op = WRITEBOOT;
 238         else if (op == UNSPEC)
 239                 op = READ;
 240
 241         switch(op) {
 242
 243         case UNSPEC:
 244                 break;
 245
 246         case EDIT:
 247                 if (argc != 1)
 248                         usage();
 249                 readlabel(1);
 250                 fixlabel(&lab);
 251                 error = edit();
 252                 break;
 253
 254         case READ:
 255                 if (argc != 1)
 256                         usage();
 257                 readlabel(1);
 258                 display(stdout, NULL);
 259                 error = checklabel(NULL);
 260                 break;
 261
 262         case RESTORE:
 263                 if (argc != 2)
 264                         usage();
 265                 if (!(t = fopen(argv[1], "r")))
 266                         err(4, "fopen %s", argv[1]);
 267                 readlabel(0);
 268                 if (!getasciilabel(t, &lab))
 269                         exit(1);
 270                 error = writelabel();
 271                 break;
 272
 273         case WRITE:
 274                 if (argc == 2)
 275                         name = argv[1];
 276                 else if (argc == 1)
 277                         name = "auto";
 278                 else
 279                         usage();
 280                 readlabel(0);
 281                 makelabel(name, &lab);
 282                 fixlabel(&lab);
 283                 if (checklabel(NULL) == 0)
 284                         error = writelabel();
 285                 break;
 286
 287         case WRITEBOOT:
 288
 289                 readlabel(1);
 290                 fixlabel(&lab);
 291                 if (argc == 2)
 292                         makelabel(argv[1], &lab);
 293                 if (checklabel(NULL) == 0)
 294                         error = writelabel();
 295                 break;
 296         }
 297         exit(error);
 298 }
 299
 300 static void
 301 fixlabel(struct disklabel *lp)
 302 {
 303         struct partition *dp;
 304         int i;
 305
 306         for (i = 0; i < lp->d_npartitions; i++) {
 307                 if (i == RAW_PART)
 308                         continue;
 309                 if (lp->d_partitions[i].p_size)
 310                         return;
 311         }
 312
 313         dp = &lp->d_partitions[0];
 314         dp->p_offset = BBSIZE / secsize;
 315         dp->p_size = lp->d_secperunit - dp->p_offset;
 316 }
 317
 318 /*
 319  * Construct a prototype disklabel from /etc/disktab.
 320  */
 321 static void
 322 makelabel(const char *type, struct disklabel *lp)
 323 {
 324         struct disklabel *dp;
 325
 326         if (strcmp(type, "auto") == 0)
 327                 dp = getvirginlabel();
 328         else
 329                 dp = getdiskbyname(type);
 330         if (dp == NULL)
 331                 errx(1, "%s: unknown disk type", type);
 332         *lp = *dp;
 333         bzero(lp->d_packname, sizeof(lp->d_packname));
 334 }
 335
 336 static void
 337 readboot(void)
 338 {
 339         int fd;
 340         struct stat st;
 341
 342         if (xxboot == NULL)
 343                 xxboot = "/boot/boot";
 344         fd = open(xxboot, O_RDONLY);
 345         if (fd < 0)
 346                 err(1, "cannot open %s", xxboot);
 347         fstat(fd, &st);
 348         if (st.st_size <= BBSIZE) {
 349                 if (read(fd, bootarea, st.st_size) != st.st_size)
 350                         err(1, "read error %s", xxboot);
 351                 return;
 352         }
 353         errx(1, "boot code %s is wrong size", xxboot);
 354 }
 355
 356 static int
 357 geom_bsd_available(void)
 358 {
 359         struct gclass *class;
 360         struct gmesh mesh;
 361         int error;
 362
 363         error = geom_gettree(&mesh);
 364         if (error != 0)
 365                 errc(1, error, "Cannot get GEOM tree");
 366
 367         LIST_FOREACH(class, &mesh.lg_class, lg_class) {
 368                 if (strcmp(class->lg_name, "BSD") == 0) {
 369                         geom_deletetree(&mesh);
 370                         return (1);
 371                 }
 372         }
 373
 374         geom_deletetree(&mesh);
 375
 376         return (0);
 377 }
 378
 379 static int
 380 writelabel(void)
 381 {
 382         int i, fd, serrno;
 383         struct gctl_req *grq;
 384         char const *errstr;
 385         struct disklabel *lp = &lab;
 386
 387         if (disable_write) {
 388                 warnx("write to disk label supressed - label was as follows:");
 389                 display(stdout, NULL);
 390                 return (0);
 391         }
 392
 393         lp->d_magic = DISKMAGIC;
 394         lp->d_magic2 = DISKMAGIC;
 395         lp->d_checksum = 0;
 396         lp->d_checksum = dkcksum(lp);
 397         if (installboot)
 398                 readboot();
 399         for (i = 0; i < lab.d_npartitions; i++)
 400                 if (lab.d_partitions[i].p_size)
 401                         lab.d_partitions[i].p_offset += lba_offset;
 402         bsd_disklabel_le_enc(bootarea + labeloffset + labelsoffset * secsize,
 403             lp);
 404
 405         fd = open(specname, O_RDWR);
 406         if (fd < 0) {
 407                 if (is_file) {
 408                         warn("cannot open file %s for writing label", specname);
 409                         return(1);
 410                 } else
 411                         serrno = errno;
 412
 413                 /* Give up if GEOM_BSD is not available. */
 414                 if (geom_bsd_available() == 0) {
 415                         warnc(serrno, "%s", specname);
 416                         return (1);
 417                 }
 418
 419                 grq = gctl_get_handle();
 420                 gctl_ro_param(grq, "verb", -1, "write label");
 421                 gctl_ro_param(grq, "class", -1, "BSD");
 422                 gctl_ro_param(grq, "geom", -1, pname);
 423                 gctl_ro_param(grq, "label", 148+16*8,
 424                         bootarea + labeloffset + labelsoffset * secsize);
 425                 errstr = gctl_issue(grq);
 426                 if (errstr != NULL) {
 427                         warnx("%s", errstr);
 428                         gctl_free(grq);
 429                         return(1);
 430                 }
 431                 gctl_free(grq);
 432                 if (installboot) {
 433                         grq = gctl_get_handle();
 434                         gctl_ro_param(grq, "verb", -1, "write bootcode");
 435                         gctl_ro_param(grq, "class", -1, "BSD");
 436                         gctl_ro_param(grq, "geom", -1, pname);
 437                         gctl_ro_param(grq, "bootcode", BBSIZE, bootarea);
 438                         errstr = gctl_issue(grq);
 439                         if (errstr != NULL) {
 440                                 warnx("%s", errstr);
 441                                 gctl_free(grq);
 442                                 return (1);
 443                         }
 444                         gctl_free(grq);
 445                 }
 446         } else {
 447                 if (write(fd, bootarea, bbsize) != bbsize) {
 448                         warn("write %s", specname);
 449                         close (fd);
 450                         return (1);
 451                 }
 452                 close (fd);
 453         }
 454         return (0);
 455 }
 456
 457 static void
 458 get_file_parms(int f)
 459 {
 460         int i;
 461         struct stat sb;
 462
 463         if (fstat(f, &sb) != 0)
 464                 err(4, "fstat failed");
 465         i = sb.st_mode & S_IFMT;
 466         if (i != S_IFREG && i != S_IFLNK)
 467                 errx(4, "%s is not a valid file or link", specname);
 468         secsize = DEV_BSIZE;
 469         mediasize = sb.st_size;
 470 }
 471
 472 /*
 473  * Fetch disklabel for disk.
 474  */
 475 static int
 476 readlabel(int flag)
 477 {
 478         ssize_t nbytes;
 479         uint32_t lba;
 480         int f, i;
 481         int error;
 482
 483         f = open(specname, O_RDONLY);
 484         if (f < 0)
 485                 err(1, specname);
 486         if (is_file)
 487                 get_file_parms(f);
 488         else {
 489                 mediasize = g_mediasize(f);
 490                 secsize = g_sectorsize(f);
 491                 if (secsize < 0 || mediasize < 0)
 492                         err(4, "cannot get disk geometry");
 493         }
 494         if (mediasize > (off_t)0xffffffff * secsize)
 495                 errx(1,
 496                     "disks with more than 2^32-1 sectors are not supported");
 497         (void)lseek(f, (off_t)0, SEEK_SET);
 498         nbytes = read(f, bootarea, BBSIZE);
 499         if (nbytes == -1)
 500                 err(4, "%s read", specname);
 501         if (nbytes != BBSIZE)
 502                 errx(4, "couldn't read %d bytes from %s", BBSIZE, specname);
 503         close (f);
 504         error = bsd_disklabel_le_dec(
 505             bootarea + (labeloffset + labelsoffset * secsize),
 506             &lab, MAXPARTITIONS);
 507         if (flag && error)
 508                 errx(1, "%s: no valid label found", specname);
 509
 510         if (is_file)
 511                 return(0);
 512
 513         /*
 514          * Compensate for absolute block addressing by finding the
 515          * smallest partition offset and if the offset of the 'c'
 516          * partition is equal to that, subtract it from all offsets.
 517          */
 518         lba = ~0;
 519         for (i = 0; i < lab.d_npartitions; i++) {
 520                 if (lab.d_partitions[i].p_size)
 521                         lba = MIN(lba, lab.d_partitions[i].p_offset);
 522         }
 523         if (lba != 0 && lab.d_partitions[RAW_PART].p_offset == lba) {
 524                 for (i = 0; i < lab.d_npartitions; i++) {
 525                         if (lab.d_partitions[i].p_size)
 526                                 lab.d_partitions[i].p_offset -= lba;
 527                 }
 528                 /*
 529                  * Save the offset so that we can write the label
 530                  * back with absolute block addresses.
 531                  */
 532                 lba_offset = lba;
 533         }
 534         return (error);
 535 }
 536
 537
 538 static void
 539 display(FILE *f, const struct disklabel *lp)
 540 {
 541         int i, j;
 542         const struct partition *pp;
 543
 544         if (lp == NULL)
 545                 lp = &lab;
 546
 547         fprintf(f, "# %s:\n", specname);
 548         if (allfields) {
 549                 if (lp->d_type < DKMAXTYPES)
 550                         fprintf(f, "type: %s\n", dktypenames[lp->d_type]);
 551                 else
 552                         fprintf(f, "type: %u\n", lp->d_type);
 553                 fprintf(f, "disk: %.*s\n", (int)sizeof(lp->d_typename),
 554                         lp->d_typename);
 555                 fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname),
 556                         lp->d_packname);
 557                 fprintf(f, "flags:");
 558                 if (lp->d_flags & D_REMOVABLE)
 559                         fprintf(f, " removeable");
 560                 if (lp->d_flags & D_ECC)
 561                         fprintf(f, " ecc");
 562                 if (lp->d_flags & D_BADSECT)
 563                         fprintf(f, " badsect");
 564                 fprintf(f, "\n");
 565                 fprintf(f, "bytes/sector: %lu\n", (u_long)lp->d_secsize);
 566                 fprintf(f, "sectors/track: %lu\n", (u_long)lp->d_nsectors);
 567                 fprintf(f, "tracks/cylinder: %lu\n", (u_long)lp->d_ntracks);
 568                 fprintf(f, "sectors/cylinder: %lu\n", (u_long)lp->d_secpercyl);
 569                 fprintf(f, "cylinders: %lu\n", (u_long)lp->d_ncylinders);
 570                 fprintf(f, "sectors/unit: %lu\n", (u_long)lp->d_secperunit);
 571                 fprintf(f, "rpm: %u\n", lp->d_rpm);
 572                 fprintf(f, "interleave: %u\n", lp->d_interleave);
 573                 fprintf(f, "trackskew: %u\n", lp->d_trackskew);
 574                 fprintf(f, "cylinderskew: %u\n", lp->d_cylskew);
 575                 fprintf(f, "headswitch: %lu\t\t# milliseconds\n",
 576                     (u_long)lp->d_headswitch);
 577                 fprintf(f, "track-to-track seek: %ld\t# milliseconds\n",
 578                     (u_long)lp->d_trkseek);
 579                 fprintf(f, "drivedata: ");
 580                 for (i = NDDATA - 1; i >= 0; i--)
 581                         if (lp->d_drivedata[i])
 582                                 break;
 583                 if (i < 0)
 584                         i = 0;
 585                 for (j = 0; j <= i; j++)
 586                         fprintf(f, "%lu ", (u_long)lp->d_drivedata[j]);
 587                 fprintf(f, "\n\n");
 588         }
 589         fprintf(f, "%u partitions:\n", lp->d_npartitions);
 590         fprintf(f,
 591             "#          size     offset    fstype   [fsize bsize bps/cpg]\n");
 592         pp = lp->d_partitions;
 593         for (i = 0; i < lp->d_npartitions; i++, pp++) {
 594                 if (pp->p_size) {
 595                         fprintf(f, "  %c: %10lu %10lu  ", 'a' + i,
 596                            (u_long)pp->p_size, (u_long)pp->p_offset);
 597                         if (pp->p_fstype < FSMAXTYPES)
 598                                 fprintf(f, "%8.8s", fstypenames[pp->p_fstype]);
 599                         else
 600                                 fprintf(f, "%8d", pp->p_fstype);
 601                         switch (pp->p_fstype) {
 602
 603                         case FS_UNUSED:                         /* XXX */
 604                                 fprintf(f, "    %5lu %5lu %2s",
 605                                     (u_long)pp->p_fsize,
 606                                     (u_long)(pp->p_fsize * pp->p_frag), "");
 607                                 break;
 608
 609                         case FS_BSDFFS:
 610                                 fprintf(f, "    %5lu %5lu %5u",
 611                                     (u_long)pp->p_fsize,
 612                                     (u_long)(pp->p_fsize * pp->p_frag),
 613                                     pp->p_cpg);
 614                                 break;
 615
 616                         case FS_BSDLFS:
 617                                 fprintf(f, "    %5lu %5lu %5d",
 618                                     (u_long)pp->p_fsize,
 619                                     (u_long)(pp->p_fsize * pp->p_frag),
 620                                     pp->p_cpg);
 621                                 break;
 622
 623                         default:
 624                                 fprintf(f, "%20.20s", "");
 625                                 break;
 626                         }
 627                         if (i == RAW_PART) {
 628                                 fprintf(f, "  # \"raw\" part, don't edit");
 629                         }
 630                         fprintf(f, "\n");
 631                 }
 632         }
 633         fflush(f);
 634 }
 635
 636 static int
 637 edit(void)
 638 {
 639         int c, fd;
 640         struct disklabel label;
 641         FILE *fp;
 642
 643         if ((fd = mkstemp(tmpfil)) == -1 ||
 644             (fp = fdopen(fd, "w")) == NULL) {
 645                 warnx("can't create %s", tmpfil);
 646                 return (1);
 647         }
 648         display(fp, NULL);
 649         fclose(fp);
 650         for (;;) {
 651                 if (!editit())
 652                         break;
 653                 fp = fopen(tmpfil, "r");
 654                 if (fp == NULL) {
 655                         warnx("can't reopen %s for reading", tmpfil);
 656                         break;
 657                 }
 658                 bzero((char *)&label, sizeof(label));
 659                 c = getasciilabel(fp, &label);
 660                 fclose(fp);
 661                 if (c) {
 662                         lab = label;
 663                         if (writelabel() == 0) {
 664                                 (void) unlink(tmpfil);
 665                                 return (0);
 666                         }
 667                 }
 668                 printf("re-edit the label? [y]: ");
 669                 fflush(stdout);
 670                 c = getchar();
 671                 if (c != EOF && c != (int)'\n')
 672                         while (getchar() != (int)'\n')
 673                                 ;
 674                 if  (c == (int)'n')
 675                         break;
 676         }
 677         (void) unlink(tmpfil);
 678         return (1);
 679 }
 680
 681 static int
 682 editit(void)
 683 {
 684         int pid, xpid;
 685         int locstat, omask;
 686         const char *ed;
 687
 688         omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP));
 689         while ((pid = fork()) < 0) {
 690                 if (errno == EPROCLIM) {
 691                         warnx("you have too many processes");
 692                         return(0);
 693                 }
 694                 if (errno != EAGAIN) {
 695                         warn("fork");
 696                         return(0);
 697                 }
 698                 sleep(1);
 699         }
 700         if (pid == 0) {
 701                 sigsetmask(omask);
 702                 setgid(getgid());
 703                 setuid(getuid());
 704                 if ((ed = getenv("EDITOR")) == (char *)0)
 705                         ed = DEFEDITOR;
 706                 execlp(ed, ed, tmpfil, (char *)0);
 707                 err(1, "%s", ed);
 708         }
 709         while ((xpid = wait(&locstat)) >= 0)
 710                 if (xpid == pid)
 711                         break;
 712         sigsetmask(omask);
 713         return(!locstat);
 714 }
 715
 716 static char *
 717 skip(char *cp)
 718 {
 719
 720         while (*cp != '\0' && isspace(*cp))
 721                 cp++;
 722         if (*cp == '\0' || *cp == '#')
 723                 return (NULL);
 724         return (cp);
 725 }
 726
 727 static char *
 728 word(char *cp)
 729 {
 730         char c;
 731
 732         while (*cp != '\0' && !isspace(*cp) && *cp != '#')
 733                 cp++;
 734         if ((c = *cp) != '\0') {
 735                 *cp++ = '\0';
 736                 if (c != '#')
 737                         return (skip(cp));
 738         }
 739         return (NULL);
 740 }
 741
 742 /*
 743  * Read an ascii label in from fd f,
 744  * in the same format as that put out by display(),
 745  * and fill in lp.
 746  */
 747 static int
 748 getasciilabel(FILE *f, struct disklabel *lp)
 749 {
 750         char *cp, *endp;
 751         const char **cpp;
 752         u_int part;
 753         char *tp, line[BUFSIZ];
 754         u_long v;
 755         int lineno = 0, errors = 0;
 756         int i;
 757
 758         makelabel("auto", lp);
 759         bzero(&part_set, sizeof(part_set));
 760         bzero(&part_size_type, sizeof(part_size_type));
 761         bzero(&part_offset_type, sizeof(part_offset_type));
 762         lp->d_bbsize = BBSIZE;                          /* XXX */
 763         lp->d_sbsize = 0;                               /* XXX */
 764         while (fgets(line, sizeof(line) - 1, f)) {
 765                 lineno++;
 766                 if ((cp = index(line,'\n')) != 0)
 767                         *cp = '\0';
 768                 cp = skip(line);
 769                 if (cp == NULL)
 770                         continue;
 771                 tp = index(cp, ':');
 772                 if (tp == NULL) {
 773                         fprintf(stderr, "line %d: syntax error\n", lineno);
 774                         errors++;
 775                         continue;
 776                 }
 777                 *tp++ = '\0', tp = skip(tp);
 778                 if (!strcmp(cp, "type")) {
 779                         if (tp == NULL)
 780                                 tp = unknown;
 781                         cpp = dktypenames;
 782                         for (; cpp < &dktypenames[DKMAXTYPES]; cpp++)
 783                                 if (*cpp && !strcmp(*cpp, tp)) {
 784                                         lp->d_type = cpp - dktypenames;
 785                                         break;
 786                                 }
 787                         if (cpp < &dktypenames[DKMAXTYPES])
 788                                 continue;
 789                         errno = 0;
 790                         v = strtoul(tp, &endp, 10);
 791                         if (errno != 0 || *endp != '\0')
 792                                 v = DKMAXTYPES;
 793                         if (v >= DKMAXTYPES)
 794                                 fprintf(stderr, "line %d:%s %lu\n", lineno,
 795                                     "Warning, unknown disk type", v);
 796                         else
 797                                 lp->d_type = v;
 798                         continue;
 799                 }
 800                 if (!strcmp(cp, "flags")) {
 801                         for (v = 0; (cp = tp) && *cp != '\0';) {
 802                                 tp = word(cp);
 803                                 if (!strcmp(cp, "removeable"))
 804                                         v |= D_REMOVABLE;
 805                                 else if (!strcmp(cp, "ecc"))
 806                                         v |= D_ECC;
 807                                 else if (!strcmp(cp, "badsect"))
 808                                         v |= D_BADSECT;
 809                                 else {
 810                                         fprintf(stderr,
 811                                             "line %d: %s: bad flag\n",
 812                                             lineno, cp);
 813                                         errors++;
 814                                 }
 815                         }
 816                         lp->d_flags = v;
 817                         continue;
 818                 }
 819                 if (!strcmp(cp, "drivedata")) {
 820                         for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA;) {
 821                                 lp->d_drivedata[i++] = strtoul(cp, NULL, 10);
 822                                 tp = word(cp);
 823                         }
 824                         continue;
 825                 }
 826                 if (sscanf(cp, "%lu partitions", &v) == 1) {
 827                         if (v == 0 || v > MAXPARTITIONS) {
 828                                 fprintf(stderr,
 829                                     "line %d: bad # of partitions\n", lineno);
 830                                 lp->d_npartitions = MAXPARTITIONS;
 831                                 errors++;
 832                         } else
 833                                 lp->d_npartitions = v;
 834                         continue;
 835                 }
 836                 if (tp == NULL)
 837                         tp = blank;
 838                 if (!strcmp(cp, "disk")) {
 839                         strncpy(lp->d_typename, tp, sizeof (lp->d_typename));
 840                         continue;
 841                 }
 842                 if (!strcmp(cp, "label")) {
 843                         strncpy(lp->d_packname, tp, sizeof (lp->d_packname));
 844                         continue;
 845                 }
 846                 if (!strcmp(cp, "bytes/sector")) {
 847                         v = strtoul(tp, NULL, 10);
 848                         if (v == 0 || (v % DEV_BSIZE) != 0) {
 849                                 fprintf(stderr,
 850                                     "line %d: %s: bad sector size\n",
 851                                     lineno, tp);
 852                                 errors++;
 853                         } else
 854                                 lp->d_secsize = v;
 855                         continue;
 856                 }
 857                 if (!strcmp(cp, "sectors/track")) {
 858                         v = strtoul(tp, NULL, 10);
 859 #if (ULONG_MAX != 0xffffffffUL)
 860                         if (v == 0 || v > 0xffffffff)
 861 #else
 862                         if (v == 0)
 863 #endif
 864                         {
 865                                 fprintf(stderr, "line %d: %s: bad %s\n",
 866                                     lineno, tp, cp);
 867                                 errors++;
 868                         } else
 869                                 lp->d_nsectors = v;
 870                         continue;
 871                 }
 872                 if (!strcmp(cp, "sectors/cylinder")) {
 873                         v = strtoul(tp, NULL, 10);
 874                         if (v == 0) {
 875                                 fprintf(stderr, "line %d: %s: bad %s\n",
 876                                     lineno, tp, cp);
 877                                 errors++;
 878                         } else
 879                                 lp->d_secpercyl = v;
 880                         continue;
 881                 }
 882                 if (!strcmp(cp, "tracks/cylinder")) {
 883                         v = strtoul(tp, NULL, 10);
 884                         if (v == 0) {
 885                                 fprintf(stderr, "line %d: %s: bad %s\n",
 886                                     lineno, tp, cp);
 887                                 errors++;
 888                         } else
 889                                 lp->d_ntracks = v;
 890                         continue;
 891                 }
 892                 if (!strcmp(cp, "cylinders")) {
 893                         v = strtoul(tp, NULL, 10);
 894                         if (v == 0) {
 895                                 fprintf(stderr, "line %d: %s: bad %s\n",
 896                                     lineno, tp, cp);
 897                                 errors++;
 898                         } else
 899                                 lp->d_ncylinders = v;
 900                         continue;
 901                 }
 902                 if (!strcmp(cp, "sectors/unit")) {
 903                         v = strtoul(tp, NULL, 10);
 904                         if (v == 0) {
 905                                 fprintf(stderr, "line %d: %s: bad %s\n",
 906                                     lineno, tp, cp);
 907                                 errors++;
 908                         } else
 909                                 lp->d_secperunit = v;
 910                         continue;
 911                 }
 912                 if (!strcmp(cp, "rpm")) {
 913                         v = strtoul(tp, NULL, 10);
 914                         if (v == 0 || v > USHRT_MAX) {
 915                                 fprintf(stderr, "line %d: %s: bad %s\n",
 916                                     lineno, tp, cp);
 917                                 errors++;
 918                         } else
 919                                 lp->d_rpm = v;
 920                         continue;
 921                 }
 922                 if (!strcmp(cp, "interleave")) {
 923                         v = strtoul(tp, NULL, 10);
 924                         if (v == 0 || v > USHRT_MAX) {
 925                                 fprintf(stderr, "line %d: %s: bad %s\n",
 926                                     lineno, tp, cp);
 927                                 errors++;
 928                         } else
 929                                 lp->d_interleave = v;
 930                         continue;
 931                 }
 932                 if (!strcmp(cp, "trackskew")) {
 933                         v = strtoul(tp, NULL, 10);
 934                         if (v > USHRT_MAX) {
 935                                 fprintf(stderr, "line %d: %s: bad %s\n",
 936                                     lineno, tp, cp);
 937                                 errors++;
 938                         } else
 939                                 lp->d_trackskew = v;
 940                         continue;
 941                 }
 942                 if (!strcmp(cp, "cylinderskew")) {
 943                         v = strtoul(tp, NULL, 10);
 944                         if (v > USHRT_MAX) {
 945                                 fprintf(stderr, "line %d: %s: bad %s\n",
 946                                     lineno, tp, cp);
 947                                 errors++;
 948                         } else
 949                                 lp->d_cylskew = v;
 950                         continue;
 951                 }
 952                 if (!strcmp(cp, "headswitch")) {
 953                         v = strtoul(tp, NULL, 10);
 954                         lp->d_headswitch = v;
 955                         continue;
 956                 }
 957                 if (!strcmp(cp, "track-to-track seek")) {
 958                         v = strtoul(tp, NULL, 10);
 959                         lp->d_trkseek = v;
 960                         continue;
 961                 }
 962                 /* the ':' was removed above */
 963                 if (*cp < 'a' || *cp > MAX_PART || cp[1] != '\0') {
 964                         fprintf(stderr,
 965                             "line %d: %s: Unknown disklabel field\n", lineno,
 966                             cp);
 967                         errors++;
 968                         continue;
 969                 }
 970
 971                 /* Process a partition specification line. */
 972                 part = *cp - 'a';
 973                 if (part >= lp->d_npartitions) {
 974                         fprintf(stderr,
 975                             "line %d: partition name out of range a-%c: %s\n",
 976                             lineno, 'a' + lp->d_npartitions - 1, cp);
 977                         errors++;
 978                         continue;
 979                 }
 980                 part_set[part] = 1;
 981
 982                 if (getasciipartspec(tp, lp, part, lineno) != 0) {
 983                         errors++;
 984                         break;
 985                 }
 986         }
 987         errors += checklabel(lp);
 988         return (errors == 0);
 989 }
 990
 991 #define NXTNUM(n) do { \
 992         if (tp == NULL) { \
 993                 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \
 994                 return (1); \
 995         } else { \
 996                 cp = tp, tp = word(cp); \
 997                 (n) = strtoul(cp, NULL, 10); \
 998         } \
 999 } while (0)
1000
1001 /* retain 1 character following number */
1002 #define NXTWORD(w,n) do { \
1003         if (tp == NULL) { \
1004                 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \
1005                 return (1); \
1006         } else { \
1007                 char *tmp; \
1008                 cp = tp, tp = word(cp); \
1009                 (n) = strtoul(cp, &tmp, 10); \
1010                 if (tmp) (w) = *tmp; \
1011         } \
1012 } while (0)
1013
1014 /*
1015  * Read a partition line into partition `part' in the specified disklabel.
1016  * Return 0 on success, 1 on failure.
1017  */
1018 static int
1019 getasciipartspec(char *tp, struct disklabel *lp, int part, int lineno)
1020 {
1021         struct partition *pp;
1022         char *cp, *endp;
1023         const char **cpp;
1024         u_long v;
1025
1026         pp = &lp->d_partitions[part];
1027         cp = NULL;
1028
1029         v = 0;
1030         NXTWORD(part_size_type[part],v);
1031         if (v == 0 && part_size_type[part] != '*') {
1032                 fprintf(stderr,
1033                     "line %d: %s: bad partition size\n", lineno, cp);
1034                 return (1);
1035         }
1036         pp->p_size = v;
1037
1038         v = 0;
1039         NXTWORD(part_offset_type[part],v);
1040         if (v == 0 && part_offset_type[part] != '*' &&
1041             part_offset_type[part] != '\0') {
1042                 fprintf(stderr,
1043                     "line %d: %s: bad partition offset\n", lineno, cp);
1044                 return (1);
1045         }
1046         pp->p_offset = v;
1047         if (tp == NULL) {
1048                 fprintf(stderr, "line %d: missing file system type\n", lineno);
1049                 return (1);
1050         }
1051         cp = tp, tp = word(cp);
1052         for (cpp = fstypenames; cpp < &fstypenames[FSMAXTYPES]; cpp++)
1053                 if (*cpp && !strcmp(*cpp, cp))
1054                         break;
1055         if (*cpp != NULL) {
1056                 pp->p_fstype = cpp - fstypenames;
1057         } else {
1058                 if (isdigit(*cp)) {
1059                         errno = 0;
1060                         v = strtoul(cp, &endp, 10);
1061                         if (errno != 0 || *endp != '\0')
1062                                 v = FSMAXTYPES;
1063                 } else
1064                         v = FSMAXTYPES;
1065                 if (v >= FSMAXTYPES) {
1066                         fprintf(stderr,
1067                             "line %d: Warning, unknown file system type %s\n",
1068                             lineno, cp);
1069                         v = FS_UNUSED;
1070                 }
1071                 pp->p_fstype = v;
1072         }
1073
1074         switch (pp->p_fstype) {
1075         case FS_UNUSED:
1076         case FS_BSDFFS:
1077         case FS_BSDLFS:
1078                 /* accept defaults for fsize/frag/cpg */
1079                 if (tp) {
1080                         NXTNUM(pp->p_fsize);
1081                         if (pp->p_fsize == 0)
1082                                 break;
1083                         NXTNUM(v);
1084                         pp->p_frag = v / pp->p_fsize;
1085                         if (tp != NULL)
1086                                 NXTNUM(pp->p_cpg);
1087                 }
1088                 /* else default to 0's */
1089                 break;
1090         default:
1091                 break;
1092         }
1093         return (0);
1094 }
1095
1096 /*
1097  * Check disklabel for errors and fill in
1098  * derived fields according to supplied values.
1099  */
1100 static int
1101 checklabel(struct disklabel *lp)
1102 {
1103         struct partition *pp;
1104         int i, errors = 0;
1105         char part;
1106         u_long base_offset, needed, total_size, total_percent, current_offset;
1107         long free_space;
1108         int seen_default_offset;
1109         int hog_part;
1110         int j;
1111         struct partition *pp2;
1112
1113         if (lp == NULL)
1114                 lp = &lab;
1115
1116         if (allfields) {
1117
1118                 if (lp->d_secsize == 0) {
1119                         fprintf(stderr, "sector size 0\n");
1120                         return (1);
1121                 }
1122                 if (lp->d_nsectors == 0) {
1123                         fprintf(stderr, "sectors/track 0\n");
1124                         return (1);
1125                 }
1126                 if (lp->d_ntracks == 0) {
1127                         fprintf(stderr, "tracks/cylinder 0\n");
1128                         return (1);
1129                 }
1130                 if  (lp->d_ncylinders == 0) {
1131                         fprintf(stderr, "cylinders/unit 0\n");
1132                         errors++;
1133                 }
1134                 if (lp->d_rpm == 0)
1135                         warnx("revolutions/minute 0");
1136                 if (lp->d_secpercyl == 0)
1137                         lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks;
1138                 if (lp->d_secperunit == 0)
1139                         lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders;
1140                 if (lp->d_bbsize == 0) {
1141                         fprintf(stderr, "boot block size 0\n");
1142                         errors++;
1143                 } else if (lp->d_bbsize % lp->d_secsize)
1144                         warnx("boot block size %% sector-size != 0");
1145                 if (lp->d_npartitions > MAXPARTITIONS)
1146                         warnx("number of partitions (%lu) > MAXPARTITIONS (%d)",
1147                             (u_long)lp->d_npartitions, MAXPARTITIONS);
1148         } else {
1149                 struct disklabel *vl;
1150
1151                 vl = getvirginlabel();
1152                 lp->d_secsize = vl->d_secsize;
1153                 lp->d_nsectors = vl->d_nsectors;
1154                 lp->d_ntracks = vl->d_ntracks;
1155                 lp->d_ncylinders = vl->d_ncylinders;
1156                 lp->d_rpm = vl->d_rpm;
1157                 lp->d_interleave = vl->d_interleave;
1158                 lp->d_secpercyl = vl->d_secpercyl;
1159                 lp->d_secperunit = vl->d_secperunit;
1160                 lp->d_bbsize = vl->d_bbsize;
1161                 lp->d_npartitions = vl->d_npartitions;
1162         }
1163
1164
1165         /* first allocate space to the partitions, then offsets */
1166         total_size = 0; /* in sectors */
1167         total_percent = 0; /* in percent */
1168         hog_part = -1;
1169         /* find all fixed partitions */
1170         for (i = 0; i < lp->d_npartitions; i++) {
1171                 pp = &lp->d_partitions[i];
1172                 if (part_set[i]) {
1173                         if (part_size_type[i] == '*') {
1174                                 if (i == RAW_PART) {
1175                                         pp->p_size = lp->d_secperunit;
1176                                 } else {
1177                                         if (hog_part != -1)
1178                                                 warnx("Too many '*' partitions (%c and %c)",
1179                                                     hog_part + 'a',i + 'a');
1180                                         else
1181                                                 hog_part = i;
1182                                 }
1183                         } else {
1184                                 off_t size;
1185
1186                                 size = pp->p_size;
1187                                 switch (part_size_type[i]) {
1188                                 case '%':
1189                                         total_percent += size;
1190                                         break;
1191                                 case 't':
1192                                 case 'T':
1193                                         size *= 1024ULL;
1194                                         /* FALLTHROUGH */
1195                                 case 'g':
1196                                 case 'G':
1197                                         size *= 1024ULL;
1198                                         /* FALLTHROUGH */
1199                                 case 'm':
1200                                 case 'M':
1201                                         size *= 1024ULL;
1202                                         /* FALLTHROUGH */
1203                                 case 'k':
1204                                 case 'K':
1205                                         size *= 1024ULL;
1206                                         break;
1207                                 case '\0':
1208                                         break;
1209                                 default:
1210                                         warnx("unknown multiplier suffix '%c' for partition %c (should be K, M, G or T)",
1211                                             part_size_type[i], i + 'a');
1212                                         break;
1213                                 }
1214                                 /* don't count %'s yet */
1215                                 if (part_size_type[i] != '%') {
1216                                         /*
1217                                          * for all not in sectors, convert to
1218                                          * sectors
1219                                          */
1220                                         if (part_size_type[i] != '\0') {
1221                                                 if (size % lp->d_secsize != 0)
1222                                                         warnx("partition %c not an integer number of sectors",
1223                                                             i + 'a');
1224                                                 size /= lp->d_secsize;
1225                                                 pp->p_size = size;
1226                                         }
1227                                         /* else already in sectors */
1228                                         if (i != RAW_PART)
1229                                                 total_size += size;
1230                                 }
1231                         }
1232                 }
1233         }
1234
1235         /* Find out the total free space, excluding the boot block area. */
1236         base_offset = BBSIZE / secsize;
1237         free_space = 0;
1238         for (i = 0; i < lp->d_npartitions; i++) {
1239                 pp = &lp->d_partitions[i];
1240                 if (!part_set[i] || i == RAW_PART ||
1241                     part_size_type[i] == '%' || part_size_type[i] == '*')
1242                         continue;
1243                 if (pp->p_offset > base_offset)
1244                         free_space += pp->p_offset - base_offset;
1245                 if (pp->p_offset + pp->p_size > base_offset)
1246                         base_offset = pp->p_offset + pp->p_size;
1247         }
1248         if (base_offset < lp->d_secperunit)
1249                 free_space += lp->d_secperunit - base_offset;
1250
1251         /* handle % partitions - note %'s don't need to add up to 100! */
1252         if (total_percent != 0) {
1253                 if (total_percent > 100) {
1254                         fprintf(stderr,"total percentage %lu is greater than 100\n",
1255                             total_percent);
1256                         errors++;
1257                 }
1258
1259                 if (free_space > 0) {
1260                         for (i = 0; i < lp->d_npartitions; i++) {
1261                                 pp = &lp->d_partitions[i];
1262                                 if (part_set[i] && part_size_type[i] == '%') {
1263                                         /* careful of overflows! and integer roundoff */
1264                                         pp->p_size = ((double)pp->p_size/100) * free_space;
1265                                         total_size += pp->p_size;
1266
1267                                         /* FIX we can lose a sector or so due to roundoff per
1268                                            partition.  A more complex algorithm could avoid that */
1269                                 }
1270                         }
1271                 } else {
1272                         fprintf(stderr,
1273                             "%ld sectors available to give to '*' and '%%' partitions\n",
1274                             free_space);
1275                         errors++;
1276                         /* fix?  set all % partitions to size 0? */
1277                 }
1278         }
1279         /* give anything remaining to the hog partition */
1280         if (hog_part != -1) {
1281                 /*
1282                  * Find the range of offsets usable by '*' partitions around
1283                  * the hog partition and how much space they need.
1284                  */
1285                 needed = 0;
1286                 base_offset = BBSIZE / secsize;
1287                 for (i = hog_part - 1; i >= 0; i--) {
1288                         pp = &lp->d_partitions[i];
1289                         if (!part_set[i] || i == RAW_PART)
1290                                 continue;
1291                         if (part_offset_type[i] == '*') {
1292                                 needed += pp->p_size;
1293                                 continue;
1294                         }
1295                         base_offset = pp->p_offset + pp->p_size;
1296                         break;
1297                 }
1298                 current_offset = lp->d_secperunit;
1299                 for (i = lp->d_npartitions - 1; i > hog_part; i--) {
1300                         pp = &lp->d_partitions[i];
1301                         if (!part_set[i] || i == RAW_PART)
1302                                 continue;
1303                         if (part_offset_type[i] == '*') {
1304                                 needed += pp->p_size;
1305                                 continue;
1306                         }
1307                         current_offset = pp->p_offset;
1308                 }
1309
1310                 if (current_offset - base_offset <= needed) {
1311                         fprintf(stderr, "Cannot find space for partition %c\n",
1312                             hog_part + 'a');
1313                         fprintf(stderr,
1314                             "Need more than %lu sectors between %lu and %lu\n",
1315                             needed, base_offset, current_offset);
1316                         errors++;
1317                         lp->d_partitions[hog_part].p_size = 0;
1318                 } else {
1319                         lp->d_partitions[hog_part].p_size = current_offset -
1320                             base_offset - needed;
1321                         total_size += lp->d_partitions[hog_part].p_size;
1322                 }
1323         }
1324
1325         /* Now set the offsets for each partition */
1326         current_offset = BBSIZE / secsize; /* in sectors */
1327         seen_default_offset = 0;
1328         for (i = 0; i < lp->d_npartitions; i++) {
1329                 part = 'a' + i;
1330                 pp = &lp->d_partitions[i];
1331                 if (part_set[i]) {
1332                         if (part_offset_type[i] == '*') {
1333                                 if (i == RAW_PART) {
1334                                         pp->p_offset = 0;
1335                                 } else {
1336                                         pp->p_offset = current_offset;
1337                                         seen_default_offset = 1;
1338                                 }
1339                         } else {
1340                                 /* allow them to be out of order for old-style tables */
1341                                 if (pp->p_offset < current_offset &&
1342                                     seen_default_offset && i != RAW_PART &&
1343                                     pp->p_fstype != FS_VINUM) {
1344                                         fprintf(stderr,
1345 "Offset %ld for partition %c overlaps previous partition which ends at %lu\n",
1346                                             (long)pp->p_offset,i+'a',current_offset);
1347                                         fprintf(stderr,
1348 "Labels with any *'s for offset must be in ascending order by sector\n");
1349                                         errors++;
1350                                 } else if (pp->p_offset != current_offset &&
1351                                     i != RAW_PART && seen_default_offset) {
1352                                         /*
1353                                          * this may give unneeded warnings if
1354                                          * partitions are out-of-order
1355                                          */
1356                                         warnx(
1357 "Offset %ld for partition %c doesn't match expected value %ld",
1358                                             (long)pp->p_offset, i + 'a', current_offset);
1359                                 }
1360                         }
1361                         if (i != RAW_PART)
1362                                 current_offset = pp->p_offset + pp->p_size;
1363                 }
1364         }
1365
1366         for (i = 0; i < lp->d_npartitions; i++) {
1367                 part = 'a' + i;
1368                 pp = &lp->d_partitions[i];
1369                 if (pp->p_size == 0 && pp->p_offset != 0)
1370                         warnx("partition %c: size 0, but offset %lu",
1371                             part, (u_long)pp->p_offset);
1372 #ifdef notdef
1373                 if (pp->p_size % lp->d_secpercyl)
1374                         warnx("partition %c: size %% cylinder-size != 0",
1375                             part);
1376                 if (pp->p_offset % lp->d_secpercyl)
1377                         warnx("partition %c: offset %% cylinder-size != 0",
1378                             part);
1379 #endif
1380                 if (pp->p_offset > lp->d_secperunit) {
1381                         fprintf(stderr,
1382                             "partition %c: offset past end of unit\n", part);
1383                         errors++;
1384                 }
1385                 if (pp->p_offset + pp->p_size > lp->d_secperunit) {
1386                         fprintf(stderr,
1387                         "partition %c: partition extends past end of unit\n",
1388                             part);
1389                         errors++;
1390                 }
1391                 if (i == RAW_PART) {
1392                         if (pp->p_fstype != FS_UNUSED)
1393                                 warnx("partition %c is not marked as unused!",part);
1394                         if (pp->p_offset != 0)
1395                                 warnx("partition %c doesn't start at 0!",part);
1396                         if (pp->p_size != lp->d_secperunit)
1397                                 warnx("partition %c doesn't cover the whole unit!",part);
1398
1399                         if ((pp->p_fstype != FS_UNUSED) || (pp->p_offset != 0) ||
1400                             (pp->p_size != lp->d_secperunit)) {
1401                                 warnx("An incorrect partition %c may cause problems for "
1402                                     "standard system utilities",part);
1403                         }
1404                 }
1405
1406                 /* check for overlaps */
1407                 /* this will check for all possible overlaps once and only once */
1408                 for (j = 0; j < i; j++) {
1409                         pp2 = &lp->d_partitions[j];
1410                         if (j != RAW_PART && i != RAW_PART &&
1411                             pp->p_fstype != FS_VINUM &&
1412                             pp2->p_fstype != FS_VINUM &&
1413                             part_set[i] && part_set[j]) {
1414                                 if (pp2->p_offset < pp->p_offset + pp->p_size &&
1415                                     (pp2->p_offset + pp2->p_size > pp->p_offset ||
1416                                         pp2->p_offset >= pp->p_offset)) {
1417                                         fprintf(stderr,"partitions %c and %c overlap!\n",
1418                                             j + 'a', i + 'a');
1419                                         errors++;
1420                                 }
1421                         }
1422                 }
1423         }
1424         for (; i < lp->d_npartitions; i++) {
1425                 part = 'a' + i;
1426                 pp = &lp->d_partitions[i];
1427                 if (pp->p_size || pp->p_offset)
1428                         warnx("unused partition %c: size %d offset %lu",
1429                             'a' + i, pp->p_size, (u_long)pp->p_offset);
1430         }
1431         return (errors);
1432 }
1433
1434 /*
1435  * When operating on a "virgin" disk, try getting an initial label
1436  * from the associated device driver.  This might work for all device
1437  * drivers that are able to fetch some initial device parameters
1438  * without even having access to a (BSD) disklabel, like SCSI disks,
1439  * most IDE drives, or vn devices.
1440  *
1441  * The device name must be given in its "canonical" form.
1442  */
1443 static struct disklabel *
1444 getvirginlabel(void)
1445 {
1446         static struct disklabel loclab;
1447         struct partition *dp;
1448         int f;
1449         u_int u;
1450
1451         if ((f = open(specname, O_RDONLY)) == -1) {
1452                 warn("cannot open %s", specname);
1453                 return (NULL);
1454         }
1455
1456         if (is_file)
1457                 get_file_parms(f);
1458         else {
1459                 mediasize = g_mediasize(f);
1460                 secsize = g_sectorsize(f);
1461                 if (secsize < 0 || mediasize < 0) {
1462                         close (f);
1463                         return (NULL);
1464                 }
1465         }
1466         memset(&loclab, 0, sizeof loclab);
1467         loclab.d_magic = DISKMAGIC;
1468         loclab.d_magic2 = DISKMAGIC;
1469         loclab.d_secsize = secsize;
1470         loclab.d_secperunit = mediasize / secsize;
1471
1472         /*
1473          * Nobody in these enligthened days uses the CHS geometry for
1474          * anything, but nontheless try to get it right.  If we fail
1475          * to get any good ideas from the device, construct something
1476          * which is IBM-PC friendly.
1477          */
1478         if (ioctl(f, DIOCGFWSECTORS, &u) == 0)
1479                 loclab.d_nsectors = u;
1480         else
1481                 loclab.d_nsectors = 63;
1482         if (ioctl(f, DIOCGFWHEADS, &u) == 0)
1483                 loclab.d_ntracks = u;
1484         else if (loclab.d_secperunit <= 63*1*1024)
1485                 loclab.d_ntracks = 1;
1486         else if (loclab.d_secperunit <= 63*16*1024)
1487                 loclab.d_ntracks = 16;
1488         else
1489                 loclab.d_ntracks = 255;
1490         loclab.d_secpercyl = loclab.d_ntracks * loclab.d_nsectors;
1491         loclab.d_ncylinders = loclab.d_secperunit / loclab.d_secpercyl;
1492         loclab.d_npartitions = DEFPARTITIONS;
1493
1494         /* Various (unneeded) compat stuff */
1495         loclab.d_rpm = 3600;
1496         loclab.d_bbsize = BBSIZE;
1497         loclab.d_interleave = 1;
1498         strncpy(loclab.d_typename, "amnesiac",
1499             sizeof(loclab.d_typename));
1500
1501         dp = &loclab.d_partitions[RAW_PART];
1502         dp->p_size = loclab.d_secperunit;
1503         loclab.d_checksum = dkcksum(&loclab);
1504         close (f);
1505         return (&loclab);
1506 }
1507
1508 static void
1509 usage(void)
1510 {
1511
1512         fprintf(stderr,
1513         "%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",
1514         "usage: bsdlabel disk",
1515         "\t\t(to read label)",
1516         "       bsdlabel -w [-n] [-m machine] disk [type]",
1517         "\t\t(to write label with existing boot program)",
1518         "       bsdlabel -e [-n] [-m machine] disk",
1519         "\t\t(to edit label)",
1520         "       bsdlabel -R [-n] [-m machine] disk protofile",
1521         "\t\t(to restore label with existing boot program)",
1522         "       bsdlabel -B [-b boot] [-m machine] disk",
1523         "\t\t(to install boot program with existing on-disk label)",
1524         "       bsdlabel -w -B [-n] [-b boot] [-m machine] disk [type]",
1525         "\t\t(to write label and install boot program)",
1526         "       bsdlabel -R -B [-n] [-b boot] [-m machine] disk protofile",
1527                 "\t\t(to restore label and install boot program)"
1528         );
1529         exit(1);
1530 }