sbin/disklabel/disklabel.c

   1 /*
   2  * Copyright (c) 1987, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Symmetric Computer Systems.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  */
  36
  37 #ifndef lint
  38 static const char copyright[] =
  39 "@(#) Copyright (c) 1987, 1993\n\
  40         The Regents of the University of California.  All rights reserved.\n";
  41 #endif /* not lint */
  42
  43 #ifndef lint
  44 #if 0
  45 static char sccsid[] = "@(#)disklabel.c 8.2 (Berkeley) 1/7/94";
  46 /* from static char sccsid[] = "@(#)disklabel.c 1.2 (Symmetric) 11/28/85"; */
  47 #endif
  48 static const char rcsid[] =
  49   "$FreeBSD: src/sbin/disklabel/disklabel.c,v 1.28.2.15 2003/01/24 16:18:16 des Exp $";
  50 #endif /* not lint */
  51
  52 #include <sys/param.h>
  53 #include <sys/file.h>
  54 #include <sys/stat.h>
  55 #include <sys/wait.h>
  56 #define DKTYPENAMES
  57 #include <sys/disklabel.h>
  58 #include <ufs/ffs/fs.h>
  59 #include <unistd.h>
  60 #include <string.h>
  61 #include <stdio.h>
  62 #include <stdlib.h>
  63 #include <signal.h>
  64 #include <stdarg.h>
  65 #include <ctype.h>
  66 #include <err.h>
  67 #include <errno.h>
  68 #include "pathnames.h"
  69
  70 /*
  71  * Disklabel: read and write disklabels.
  72  * The label is usually placed on one of the first sectors of the disk.
  73  * Many machines also place a bootstrap in the same area,
  74  * in which case the label is embedded in the bootstrap.
  75  * The bootstrap source must leave space at the proper offset
  76  * for the label on such machines.
  77  */
  78
  79 #ifndef BBSIZE
  80 #define BBSIZE  8192                    /* size of boot area, with label */
  81 #endif
  82
  83 /* FIX!  These are too low, but are traditional */
  84 #define DEFAULT_NEWFS_BLOCK  8192U
  85 #define DEFAULT_NEWFS_FRAG   1024U
  86 #define DEFAULT_NEWFS_CPG    16U
  87
  88 #define BIG_NEWFS_BLOCK  16384U
  89 #define BIG_NEWFS_FRAG   2048U
  90 #define BIG_NEWFS_CPG    64U
  91
  92 #ifdef tahoe
  93 #define NUMBOOT 0
  94 #else
  95 #if defined(__alpha__) || defined(hp300) || defined(hp800)
  96 #define NUMBOOT 1
  97 #else
  98 #define NUMBOOT 2
  99 #endif
 100 #endif
 101
 102 void    makelabel(const char *, const char *, struct disklabel *);
 103 int     writelabel(int, const char *, struct disklabel *);
 104 void    l_perror(const char *);
 105 struct disklabel *readlabel(int);
 106 struct disklabel *makebootarea(char *, struct disklabel *, int);
 107 void    display(FILE *, const struct disklabel *);
 108 int     edit(struct disklabel *, int);
 109 int     editit(void);
 110 char    *skip(char *);
 111 char    *word(char *);
 112 int     getasciilabel(FILE *, struct disklabel *);
 113 int     getasciipartspec(char *, struct disklabel *, int, int);
 114 int     checklabel(struct disklabel *);
 115 void    setbootflag(struct disklabel *);
 116 void    Warning(const char *, ...) __printflike(1, 2);
 117 void    usage(void);
 118 struct disklabel *getvirginlabel(void);
 119
 120 #define DEFEDITOR       _PATH_VI
 121 #define streq(a,b)      (strcmp(a,b) == 0)
 122
 123 char    *dkname;
 124 char    *specname;
 125 char    tmpfil[] = PATH_TMPFILE;
 126
 127 char    namebuf[BBSIZE], *np = namebuf;
 128 struct  disklabel lab;
 129 char    bootarea[BBSIZE];
 130
 131 #define MAX_PART ('z')
 132 #define MAX_NUM_PARTS (1 + MAX_PART - 'a')
 133 char    part_size_type[MAX_NUM_PARTS];
 134 char    part_offset_type[MAX_NUM_PARTS];
 135 int     part_set[MAX_NUM_PARTS];
 136
 137 #if NUMBOOT > 0
 138 int     installboot;    /* non-zero if we should install a boot program */
 139 char    *bootbuf;       /* pointer to buffer with remainder of boot prog */
 140 int     bootsize;       /* size of remaining boot program */
 141 char    *xxboot;        /* primary boot */
 142 char    *bootxx;        /* secondary boot */
 143 char    boot0[MAXPATHLEN];
 144 char    boot1[MAXPATHLEN];
 145 #endif
 146
 147 enum    {
 148         UNSPEC, EDIT, NOWRITE, READ, RESTORE, WRITE, WRITEABLE, WRITEBOOT
 149 } op = UNSPEC;
 150
 151 int     rflag;
 152 int     disable_write;   /* set to disable writing to disk label */
 153
 154 #ifdef DEBUG
 155 int     debug;
 156 #define OPTIONS "BNRWb:denrs:w"
 157 #else
 158 #define OPTIONS "BNRWb:enrs:w"
 159 #endif
 160
 161 int
 162 main(int argc, char *argv[])
 163 {
 164         struct disklabel *lp;
 165         FILE *t;
 166         int ch, f = 0, flag, error = 0;
 167         char *name = 0;
 168
 169         while ((ch = getopt(argc, argv, OPTIONS)) != -1)
 170                 switch (ch) {
 171 #if NUMBOOT > 0
 172                         case 'B':
 173                                 ++installboot;
 174                                 break;
 175                         case 'b':
 176                                 xxboot = optarg;
 177                                 break;
 178 #if NUMBOOT > 1
 179                         case 's':
 180                                 bootxx = optarg;
 181                                 break;
 182 #endif
 183 #endif
 184                         case 'N':
 185                                 if (op != UNSPEC)
 186                                         usage();
 187                                 op = NOWRITE;
 188                                 break;
 189                         case 'n':
 190                                 disable_write = 1;
 191                                 break;
 192                         case 'R':
 193                                 if (op != UNSPEC)
 194                                         usage();
 195                                 op = RESTORE;
 196                                 break;
 197                         case 'W':
 198                                 if (op != UNSPEC)
 199                                         usage();
 200                                 op = WRITEABLE;
 201                                 break;
 202                         case 'e':
 203                                 if (op != UNSPEC)
 204                                         usage();
 205                                 op = EDIT;
 206                                 break;
 207                         case 'r':
 208                                 ++rflag;
 209                                 break;
 210                         case 'w':
 211                                 if (op != UNSPEC)
 212                                         usage();
 213                                 op = WRITE;
 214                                 break;
 215 #ifdef DEBUG
 216                         case 'd':
 217                                 debug++;
 218                                 break;
 219 #endif
 220                         case '?':
 221                         default:
 222                                 usage();
 223                 }
 224         argc -= optind;
 225         argv += optind;
 226 #if NUMBOOT > 0
 227         if (installboot) {
 228                 rflag++;
 229                 if (op == UNSPEC)
 230                         op = WRITEBOOT;
 231         } else {
 232                 if (op == UNSPEC)
 233                         op = READ;
 234                 xxboot = bootxx = 0;
 235         }
 236 #else
 237         if (op == UNSPEC)
 238                 op = READ;
 239 #endif
 240         if (argc < 1)
 241                 usage();
 242
 243         dkname = argv[0];
 244         if (dkname[0] != '/') {
 245                 (void)sprintf(np, "%s%s%c", _PATH_DEV, dkname, 'a' + RAW_PART);
 246                 specname = np;
 247                 np += strlen(specname) + 1;
 248         } else
 249                 specname = dkname;
 250         f = open(specname, op == READ ? O_RDONLY : O_RDWR);
 251         if (f < 0 && errno == ENOENT && dkname[0] != '/') {
 252                 (void)sprintf(specname, "%s%s", _PATH_DEV, dkname);
 253                 np = namebuf + strlen(specname) + 1;
 254                 f = open(specname, op == READ ? O_RDONLY : O_RDWR);
 255         }
 256         if (f < 0)
 257                 err(4, "%s", specname);
 258
 259         switch(op) {
 260
 261         case UNSPEC:
 262                 break;
 263
 264         case EDIT:
 265                 if (argc != 1)
 266                         usage();
 267                 lp = readlabel(f);
 268                 error = edit(lp, f);
 269                 break;
 270
 271         case NOWRITE:
 272                 flag = 0;
 273                 if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0)
 274                         err(4, "ioctl DIOCWLABEL");
 275                 break;
 276
 277         case READ:
 278                 if (argc != 1)
 279                         usage();
 280                 lp = readlabel(f);
 281                 display(stdout, lp);
 282                 error = checklabel(lp);
 283                 break;
 284
 285         case RESTORE:
 286 #if NUMBOOT > 0
 287                 if (installboot && argc == 3) {
 288                         makelabel(argv[2], 0, &lab);
 289                         argc--;
 290
 291                         /*
 292                          * We only called makelabel() for its side effect
 293                          * of setting the bootstrap file names.  Discard
 294                          * all changes to `lab' so that all values in the
 295                          * final label come from the ASCII label.
 296                          */
 297                         bzero((char *)&lab, sizeof(lab));
 298                 }
 299 #endif
 300                 if (argc != 2)
 301                         usage();
 302                 if (!(t = fopen(argv[1], "r")))
 303                         err(4, "%s", argv[1]);
 304                 if (!getasciilabel(t, &lab))
 305                         exit(1);
 306                 lp = makebootarea(bootarea, &lab, f);
 307                 *lp = lab;
 308                 error = writelabel(f, bootarea, lp);
 309                 break;
 310
 311         case WRITE:
 312                 if (argc == 3) {
 313                         name = argv[2];
 314                         argc--;
 315                 }
 316                 if (argc != 2)
 317                         usage();
 318                 makelabel(argv[1], name, &lab);
 319                 lp = makebootarea(bootarea, &lab, f);
 320                 *lp = lab;
 321                 if (checklabel(lp) == 0)
 322                         error = writelabel(f, bootarea, lp);
 323                 break;
 324
 325         case WRITEABLE:
 326                 flag = 1;
 327                 if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0)
 328                         err(4, "ioctl DIOCWLABEL");
 329                 break;
 330
 331 #if NUMBOOT > 0
 332         case WRITEBOOT:
 333         {
 334                 struct disklabel tlab;
 335
 336                 lp = readlabel(f);
 337                 tlab = *lp;
 338                 if (argc == 2)
 339                         makelabel(argv[1], 0, &lab);
 340                 lp = makebootarea(bootarea, &lab, f);
 341                 *lp = tlab;
 342                 if (checklabel(lp) == 0)
 343                         error = writelabel(f, bootarea, lp);
 344                 break;
 345         }
 346 #endif
 347         }
 348         exit(error);
 349 }
 350
 351 /*
 352  * Construct a prototype disklabel from /etc/disktab.  As a side
 353  * effect, set the names of the primary and secondary boot files
 354  * if specified.
 355  */
 356 void
 357 makelabel(const char *type, const char *name, struct disklabel *lp)
 358 {
 359         struct disklabel *dp;
 360
 361         if (strcmp(type, "auto") == 0)
 362                 dp = getvirginlabel();
 363         else
 364                 dp = getdiskbyname(type);
 365         if (dp == NULL)
 366                 errx(1, "%s: unknown disk type", type);
 367         *lp = *dp;
 368 #if NUMBOOT > 0
 369         /*
 370          * Set bootstrap name(s).
 371          * 1. If set from command line, use those,
 372          * 2. otherwise, check if disktab specifies them (b0 or b1),
 373          * 3. otherwise, makebootarea() will choose ones based on the name
 374          *    of the disk special file. E.g. /dev/ra0 -> raboot, bootra
 375          */
 376         if (!xxboot && lp->d_boot0) {
 377                 if (*lp->d_boot0 != '/')
 378                         (void)sprintf(boot0, "%s/%s",
 379                                       _PATH_BOOTDIR, lp->d_boot0);
 380                 else
 381                         (void)strcpy(boot0, lp->d_boot0);
 382                 xxboot = boot0;
 383         }
 384 #if NUMBOOT > 1
 385         if (!bootxx && lp->d_boot1) {
 386                 if (*lp->d_boot1 != '/')
 387                         (void)sprintf(boot1, "%s/%s",
 388                                       _PATH_BOOTDIR, lp->d_boot1);
 389                 else
 390                         (void)strcpy(boot1, lp->d_boot1);
 391                 bootxx = boot1;
 392         }
 393 #endif
 394 #endif
 395         /* d_packname is union d_boot[01], so zero */
 396         bzero(lp->d_packname, sizeof(lp->d_packname));
 397         if (name)
 398                 (void)strncpy(lp->d_packname, name, sizeof(lp->d_packname));
 399 }
 400
 401 int
 402 writelabel(int f, const char *boot, struct disklabel *lp)
 403 {
 404         int flag;
 405 #ifdef __alpha__
 406         u_long *p, sum;
 407         int i;
 408 #endif
 409 #ifdef vax
 410         register int i;
 411 #endif
 412
 413         if (disable_write) {
 414                 Warning("write to disk label supressed - label was as follows:");
 415                 display(stdout, lp);
 416                 return (0);
 417         } else {
 418                 setbootflag(lp);
 419                 lp->d_magic = DISKMAGIC;
 420                 lp->d_magic2 = DISKMAGIC;
 421                 lp->d_checksum = 0;
 422                 lp->d_checksum = dkcksum(lp);
 423                 if (rflag) {
 424                         /*
 425                          * First set the kernel disk label,
 426                          * then write a label to the raw disk.
 427                          * If the SDINFO ioctl fails because it is unimplemented,
 428                          * keep going; otherwise, the kernel consistency checks
 429                          * may prevent us from changing the current (in-core)
 430                          * label.
 431                          */
 432                         if (ioctl(f, DIOCSDINFO, lp) < 0 &&
 433                                 errno != ENODEV && errno != ENOTTY) {
 434                                 l_perror("ioctl DIOCSDINFO");
 435                                 return (1);
 436                         }
 437                         (void)lseek(f, (off_t)0, SEEK_SET);
 438
 439 #ifdef __alpha__
 440                         /*
 441                          * Generate the bootblock checksum for the SRM console.
 442                          */
 443                         for (p = (u_long *)boot, i = 0, sum = 0; i < 63; i++)
 444                                 sum += p[i];
 445                         p[63] = sum;
 446 #endif
 447
 448                         /*
 449                          * write enable label sector before write (if necessary),
 450                          * disable after writing.
 451                          */
 452                         flag = 1;
 453                         if (ioctl(f, DIOCWLABEL, &flag) < 0)
 454                                 warn("ioctl DIOCWLABEL");
 455                         if (write(f, boot, lp->d_bbsize) != lp->d_bbsize) {
 456                                 warn("write");
 457                                 return (1);
 458                         }
 459 #if NUMBOOT > 0
 460                         /*
 461                          * Output the remainder of the disklabel
 462                          */
 463                         if (bootbuf && write(f, bootbuf, bootsize) != bootsize) {
 464                                 warn("write");
 465                                 return(1);
 466                         }
 467 #endif
 468                         flag = 0;
 469                         (void) ioctl(f, DIOCWLABEL, &flag);
 470                 } else if (ioctl(f, DIOCWDINFO, lp) < 0) {
 471                         l_perror("ioctl DIOCWDINFO");
 472                         return (1);
 473                 }
 474 #ifdef vax
 475                 if (lp->d_type == DTYPE_SMD && lp->d_flags & D_BADSECT) {
 476                         daddr_t alt;
 477
 478                         alt = lp->d_ncylinders * lp->d_secpercyl - lp->d_nsectors;
 479                         for (i = 1; i < 11 && i < lp->d_nsectors; i += 2) {
 480                                 (void)lseek(f, (off_t)((alt + i) * lp->d_secsize),
 481                                                         SEEK_SET);
 482                                 if (write(f, boot, lp->d_secsize) < lp->d_secsize)
 483                                         warn("alternate label %d write", i/2);
 484                         }
 485                 }
 486 #endif
 487         }
 488         return (0);
 489 }
 490
 491 void
 492 l_perror(const char *s)
 493 {
 494         switch (errno) {
 495
 496         case ESRCH:
 497                 warnx("%s: no disk label on disk;", s);
 498                 fprintf(stderr, "add \"-r\" to install initial label\n");
 499                 break;
 500
 501         case EINVAL:
 502                 warnx("%s: label magic number or checksum is wrong!", s);
 503                 fprintf(stderr, "(disklabel or kernel is out of date?)\n");
 504                 break;
 505
 506         case EBUSY:
 507                 warnx("%s: open partition would move or shrink", s);
 508                 break;
 509
 510         case EXDEV:
 511                 warnx("%s: '%c' partition must start at beginning of disk",
 512                     s, 'a' + RAW_PART);
 513                 break;
 514
 515         default:
 516                 warn((char *)NULL);
 517                 break;
 518         }
 519 }
 520
 521 /*
 522  * Fetch disklabel for disk.
 523  * Use ioctl to get label unless -r flag is given.
 524  */
 525 struct disklabel *
 526 readlabel(int f)
 527 {
 528         struct disklabel *lp;
 529
 530         if (rflag) {
 531                 if (read(f, bootarea, BBSIZE) < BBSIZE)
 532                         err(4, "%s", specname);
 533                 for (lp = (struct disklabel *)bootarea;
 534                     lp <= (struct disklabel *)(bootarea + BBSIZE - sizeof(*lp));
 535                     lp = (struct disklabel *)((char *)lp + 16))
 536                         if (lp->d_magic == DISKMAGIC &&
 537                             lp->d_magic2 == DISKMAGIC)
 538                                 break;
 539                 if (lp > (struct disklabel *)(bootarea+BBSIZE-sizeof(*lp)) ||
 540                     lp->d_magic != DISKMAGIC || lp->d_magic2 != DISKMAGIC ||
 541                     dkcksum(lp) != 0)
 542                         errx(1,
 543             "bad pack magic number (label is damaged, or pack is unlabeled)");
 544         } else {
 545                 lp = &lab;
 546                 if (ioctl(f, DIOCGDINFO, lp) < 0)
 547                         err(4, "ioctl DIOCGDINFO");
 548         }
 549         return (lp);
 550 }
 551
 552 /*
 553  * Construct a bootarea (d_bbsize bytes) in the specified buffer ``boot''
 554  * Returns a pointer to the disklabel portion of the bootarea.
 555  */
 556 struct disklabel *
 557 makebootarea(char *boot, struct disklabel *dp, int f)
 558 {
 559         struct disklabel *lp;
 560         char *p;
 561         int b;
 562 #if NUMBOOT > 0
 563         char *dkbasename;
 564         struct stat sb;
 565 #endif
 566 #ifdef __alpha__
 567         u_long *bootinfo;
 568         int n;
 569 #endif
 570 #ifdef __i386__
 571         char *tmpbuf;
 572         int i, found;
 573 #endif
 574
 575         /* XXX */
 576         if (dp->d_secsize == 0) {
 577                 dp->d_secsize = DEV_BSIZE;
 578                 dp->d_bbsize = BBSIZE;
 579         }
 580         lp = (struct disklabel *)
 581                 (boot + (LABELSECTOR * dp->d_secsize) + LABELOFFSET);
 582         bzero((char *)lp, sizeof *lp);
 583 #if NUMBOOT > 0
 584         /*
 585          * If we are not installing a boot program but we are installing a
 586          * label on disk then we must read the current bootarea so we don't
 587          * clobber the existing boot.
 588          */
 589         if (!installboot) {
 590                 if (rflag) {
 591                         if (read(f, boot, BBSIZE) < BBSIZE)
 592                                 err(4, "%s", specname);
 593                         bzero((char *)lp, sizeof *lp);
 594                 }
 595                 return (lp);
 596         }
 597         /*
 598          * We are installing a boot program.  Determine the name(s) and
 599          * read them into the appropriate places in the boot area.
 600          */
 601         if (!xxboot || !bootxx) {
 602                 dkbasename = np;
 603                 if ((p = rindex(dkname, '/')) == NULL)
 604                         p = dkname;
 605                 else
 606                         p++;
 607                 while (*p && !isdigit(*p))
 608                         *np++ = *p++;
 609                 *np++ = '\0';
 610
 611                 if (!xxboot) {
 612                         (void)sprintf(boot0, "%s/boot1", _PATH_BOOTDIR);
 613                         xxboot = boot0;
 614                 }
 615 #if NUMBOOT > 1
 616                 if (!bootxx) {
 617                         (void)sprintf(boot1, "%s/boot2", _PATH_BOOTDIR);
 618                         bootxx = boot1;
 619                 }
 620 #endif
 621         }
 622 #ifdef DEBUG
 623         if (debug)
 624                 fprintf(stderr, "bootstraps: xxboot = %s, bootxx = %s\n",
 625                         xxboot, bootxx ? bootxx : "NONE");
 626 #endif
 627
 628         /*
 629          * Strange rules:
 630          * 1. One-piece bootstrap (hp300/hp800)
 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 (vax/i386?/mips?)
 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 < 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 (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 (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 stat, omask;
 874         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(&stat)) >= 0)
 898                 if (xpid == pid)
 899                         break;
 900         sigsetmask(omask);
 901         return(!stat);
 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         char **cpp;
 940         u_int part;
 941         char *tp, line[BUFSIZ];
 942         u_long v;
 943         int lineno = 0, errors = 0;
 944         int i;
 945
 946         bzero(&part_set, sizeof(part_set));
 947         bzero(&part_size_type, sizeof(part_size_type));
 948         bzero(&part_offset_type, sizeof(part_offset_type));
 949         lp->d_bbsize = BBSIZE;                          /* XXX */
 950         lp->d_sbsize = SBSIZE;                          /* XXX */
 951         while (fgets(line, sizeof(line) - 1, f)) {
 952                 lineno++;
 953                 if ((cp = index(line,'\n')) != 0)
 954                         *cp = '\0';
 955                 cp = skip(line);
 956                 if (cp == NULL)
 957                         continue;
 958                 tp = index(cp, ':');
 959                 if (tp == NULL) {
 960                         fprintf(stderr, "line %d: syntax error\n", lineno);
 961                         errors++;
 962                         continue;
 963                 }
 964                 *tp++ = '\0', tp = skip(tp);
 965                 if (streq(cp, "type")) {
 966                         if (tp == NULL)
 967                                 tp = "unknown";
 968                         cpp = dktypenames;
 969                         for (; cpp < &dktypenames[DKMAXTYPES]; cpp++)
 970                                 if (*cpp && streq(*cpp, tp)) {
 971                                         lp->d_type = cpp - dktypenames;
 972                                         break;
 973                                 }
 974                         if (cpp < &dktypenames[DKMAXTYPES])
 975                                 continue;
 976                         v = strtoul(tp, NULL, 10);
 977                         if (v >= DKMAXTYPES)
 978                                 fprintf(stderr, "line %d:%s %lu\n", lineno,
 979                                     "Warning, unknown disk type", v);
 980                         lp->d_type = v;
 981                         continue;
 982                 }
 983                 if (streq(cp, "flags")) {
 984                         for (v = 0; (cp = tp) && *cp != '\0';) {
 985                                 tp = word(cp);
 986                                 if (streq(cp, "removeable"))
 987                                         v |= D_REMOVABLE;
 988                                 else if (streq(cp, "ecc"))
 989                                         v |= D_ECC;
 990                                 else if (streq(cp, "badsect"))
 991                                         v |= D_BADSECT;
 992                                 else {
 993                                         fprintf(stderr,
 994                                             "line %d: %s: bad flag\n",
 995                                             lineno, cp);
 996                                         errors++;
 997                                 }
 998                         }
 999                         lp->d_flags = v;
1000                         continue;
1001                 }
1002                 if (streq(cp, "drivedata")) {
1003                         for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA;) {
1004                                 lp->d_drivedata[i++] = strtoul(cp, NULL, 10);
1005                                 tp = word(cp);
1006                         }
1007                         continue;
1008                 }
1009                 if (sscanf(cp, "%lu partitions", &v) == 1) {
1010                         if (v == 0 || v > MAXPARTITIONS) {
1011                                 fprintf(stderr,
1012                                     "line %d: bad # of partitions\n", lineno);
1013                                 lp->d_npartitions = MAXPARTITIONS;
1014                                 errors++;
1015                         } else
1016                                 lp->d_npartitions = v;
1017                         continue;
1018                 }
1019                 if (tp == NULL)
1020                         tp = "";
1021                 if (streq(cp, "disk")) {
1022                         strncpy(lp->d_typename, tp, sizeof (lp->d_typename));
1023                         continue;
1024                 }
1025                 if (streq(cp, "label")) {
1026                         strncpy(lp->d_packname, tp, sizeof (lp->d_packname));
1027                         continue;
1028                 }
1029                 if (streq(cp, "bytes/sector")) {
1030                         v = strtoul(tp, NULL, 10);
1031                         if (v == 0 || (v % DEV_BSIZE) != 0) {
1032                                 fprintf(stderr,
1033                                     "line %d: %s: bad sector size\n",
1034                                     lineno, tp);
1035                                 errors++;
1036                         } else
1037                                 lp->d_secsize = v;
1038                         continue;
1039                 }
1040                 if (streq(cp, "sectors/track")) {
1041                         v = strtoul(tp, NULL, 10);
1042 #if (ULONG_MAX != 0xffffffffUL)
1043                         if (v == 0 || v > 0xffffffff) {
1044 #else
1045                         if (v == 0) {
1046 #endif
1047                                 fprintf(stderr, "line %d: %s: bad %s\n",
1048                                     lineno, tp, cp);
1049                                 errors++;
1050                         } else
1051                                 lp->d_nsectors = v;
1052                         continue;
1053                 }
1054                 if (streq(cp, "sectors/cylinder")) {
1055                         v = strtoul(tp, NULL, 10);
1056                         if (v == 0) {
1057                                 fprintf(stderr, "line %d: %s: bad %s\n",
1058                                     lineno, tp, cp);
1059                                 errors++;
1060                         } else
1061                                 lp->d_secpercyl = v;
1062                         continue;
1063                 }
1064                 if (streq(cp, "tracks/cylinder")) {
1065                         v = strtoul(tp, NULL, 10);
1066                         if (v == 0) {
1067                                 fprintf(stderr, "line %d: %s: bad %s\n",
1068                                     lineno, tp, cp);
1069                                 errors++;
1070                         } else
1071                                 lp->d_ntracks = v;
1072                         continue;
1073                 }
1074                 if (streq(cp, "cylinders")) {
1075                         v = strtoul(tp, NULL, 10);
1076                         if (v == 0) {
1077                                 fprintf(stderr, "line %d: %s: bad %s\n",
1078                                     lineno, tp, cp);
1079                                 errors++;
1080                         } else
1081                                 lp->d_ncylinders = v;
1082                         continue;
1083                 }
1084                 if (streq(cp, "sectors/unit")) {
1085                         v = strtoul(tp, NULL, 10);
1086                         if (v == 0) {
1087                                 fprintf(stderr, "line %d: %s: bad %s\n",
1088                                     lineno, tp, cp);
1089                                 errors++;
1090                         } else
1091                                 lp->d_secperunit = v;
1092                         continue;
1093                 }
1094                 if (streq(cp, "rpm")) {
1095                         v = strtoul(tp, NULL, 10);
1096                         if (v == 0 || v > USHRT_MAX) {
1097                                 fprintf(stderr, "line %d: %s: bad %s\n",
1098                                     lineno, tp, cp);
1099                                 errors++;
1100                         } else
1101                                 lp->d_rpm = v;
1102                         continue;
1103                 }
1104                 if (streq(cp, "interleave")) {
1105                         v = strtoul(tp, NULL, 10);
1106                         if (v == 0 || v > USHRT_MAX) {
1107                                 fprintf(stderr, "line %d: %s: bad %s\n",
1108                                     lineno, tp, cp);
1109                                 errors++;
1110                         } else
1111                                 lp->d_interleave = v;
1112                         continue;
1113                 }
1114                 if (streq(cp, "trackskew")) {
1115                         v = strtoul(tp, NULL, 10);
1116                         if (v > USHRT_MAX) {
1117                                 fprintf(stderr, "line %d: %s: bad %s\n",
1118                                     lineno, tp, cp);
1119                                 errors++;
1120                         } else
1121                                 lp->d_trackskew = v;
1122                         continue;
1123                 }
1124                 if (streq(cp, "cylinderskew")) {
1125                         v = strtoul(tp, NULL, 10);
1126                         if (v > USHRT_MAX) {
1127                                 fprintf(stderr, "line %d: %s: bad %s\n",
1128                                     lineno, tp, cp);
1129                                 errors++;
1130                         } else
1131                                 lp->d_cylskew = v;
1132                         continue;
1133                 }
1134                 if (streq(cp, "headswitch")) {
1135                         v = strtoul(tp, NULL, 10);
1136                         lp->d_headswitch = v;
1137                         continue;
1138                 }
1139                 if (streq(cp, "track-to-track seek")) {
1140                         v = strtoul(tp, NULL, 10);
1141                         lp->d_trkseek = v;
1142                         continue;
1143                 }
1144                 /* the ':' was removed above */
1145                 if (*cp < 'a' || *cp > MAX_PART || cp[1] != '\0') {
1146                         fprintf(stderr,
1147                             "line %d: %s: Unknown disklabel field\n", lineno,
1148                             cp);
1149                         errors++;
1150                         continue;
1151                 }
1152
1153                 /* Process a partition specification line. */
1154                 part = *cp - 'a';
1155                 if (part >= lp->d_npartitions) {
1156                         fprintf(stderr,
1157                             "line %d: partition name out of range a-%c: %s\n",
1158                             lineno, 'a' + lp->d_npartitions - 1, cp);
1159                         errors++;
1160                         continue;
1161                 }
1162                 part_set[part] = 1;
1163
1164                 if (getasciipartspec(tp, lp, part, lineno) != 0) {
1165                         errors++;
1166                         break;
1167                 }
1168         }
1169         errors += checklabel(lp);
1170         return (errors == 0);
1171 }
1172
1173 #define NXTNUM(n) do { \
1174         if (tp == NULL) { \
1175                 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \
1176                 return (1); \
1177         } else { \
1178                 cp = tp, tp = word(cp); \
1179                 (n) = strtoul(cp, NULL, 10); \
1180         } \
1181 } while (0)
1182
1183 /* retain 1 character following number */
1184 #define NXTWORD(w,n) do { \
1185         if (tp == NULL) { \
1186                 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \
1187                 return (1); \
1188         } else { \
1189                 char *tmp; \
1190                 cp = tp, tp = word(cp); \
1191                 (n) = strtoul(cp, &tmp, 10); \
1192                 if (tmp) (w) = *tmp; \
1193         } \
1194 } while (0)
1195
1196 /*
1197  * Read a partition line into partition `part' in the specified disklabel.
1198  * Return 0 on success, 1 on failure.
1199  */
1200 int
1201 getasciipartspec(char *tp, struct disklabel *lp, int part, int lineno)
1202 {
1203         struct partition *pp;
1204         char *cp;
1205         char **cpp;
1206         u_long v;
1207
1208         pp = &lp->d_partitions[part];
1209         cp = NULL;
1210
1211         v = 0;
1212         NXTWORD(part_size_type[part],v);
1213         if (v == 0 && part_size_type[part] != '*') {
1214                 fprintf(stderr,
1215                     "line %d: %s: bad partition size\n", lineno, cp);
1216                 return (1);
1217         }
1218         pp->p_size = v;
1219
1220         v = 0;
1221         NXTWORD(part_offset_type[part],v);
1222         if (v == 0 && part_offset_type[part] != '*' &&
1223             part_offset_type[part] != '\0') {
1224                 fprintf(stderr,
1225                     "line %d: %s: bad partition offset\n", lineno, cp);
1226                 return (1);
1227         }
1228         pp->p_offset = v;
1229         cp = tp, tp = word(cp);
1230         for (cpp = fstypenames; cpp < &fstypenames[FSMAXTYPES]; cpp++)
1231                 if (*cpp && streq(*cpp, cp))
1232                         break;
1233         if (*cpp != NULL) {
1234                 pp->p_fstype = cpp - fstypenames;
1235         } else {
1236                 if (isdigit(*cp))
1237                         v = strtoul(cp, NULL, 10);
1238                 else
1239                         v = FSMAXTYPES;
1240                 if (v >= FSMAXTYPES) {
1241                         fprintf(stderr,
1242                             "line %d: Warning, unknown filesystem type %s\n",
1243                             lineno, cp);
1244                         v = FS_UNUSED;
1245                 }
1246                 pp->p_fstype = v;
1247         }
1248
1249         switch (pp->p_fstype) {
1250         case FS_UNUSED:
1251                 /*
1252                  * allow us to accept defaults for
1253                  * fsize/frag/cpg
1254                  */
1255                 if (tp) {
1256                         NXTNUM(pp->p_fsize);
1257                         if (pp->p_fsize == 0)
1258                                 break;
1259                         NXTNUM(v);
1260                         pp->p_frag = v / pp->p_fsize;
1261                 }
1262                 /* else default to 0's */
1263                 break;
1264
1265         /* These happen to be the same */
1266         case FS_BSDFFS:
1267         case FS_BSDLFS:
1268                 if (tp) {
1269                         NXTNUM(pp->p_fsize);
1270                         if (pp->p_fsize == 0)
1271                                 break;
1272                         NXTNUM(v);
1273                         pp->p_frag = v / pp->p_fsize;
1274                         NXTNUM(pp->p_cpg);
1275                 } else {
1276                         /*
1277                          * FIX! poor attempt at adaptive
1278                          */
1279                         /* 1 GB */
1280                         if (pp->p_size < 1024*1024*1024 / lp->d_secsize) {
1281                                 /*
1282                                  * FIX! These are too low, but are traditional
1283                                  */
1284                                 pp->p_fsize = DEFAULT_NEWFS_FRAG;
1285                                 pp->p_frag = DEFAULT_NEWFS_BLOCK /
1286                                     DEFAULT_NEWFS_FRAG;
1287                                 pp->p_cpg = DEFAULT_NEWFS_CPG;
1288                         } else {
1289                                 pp->p_fsize = BIG_NEWFS_FRAG;
1290                                 pp->p_frag = BIG_NEWFS_BLOCK /
1291                                     BIG_NEWFS_FRAG;
1292                                 pp->p_cpg = BIG_NEWFS_CPG;
1293                         }
1294                 }
1295         default:
1296                 break;
1297         }
1298         return (0);
1299 }
1300
1301 /*
1302  * Check disklabel for errors and fill in
1303  * derived fields according to supplied values.
1304  */
1305 int
1306 checklabel(struct disklabel *lp)
1307 {
1308         struct partition *pp;
1309         int i, errors = 0;
1310         char part;
1311         u_long total_size, total_percent, current_offset;
1312         int seen_default_offset;
1313         int hog_part;
1314         int j;
1315         struct partition *pp2;
1316
1317         if (lp->d_secsize == 0) {
1318                 fprintf(stderr, "sector size 0\n");
1319                 return (1);
1320         }
1321         if (lp->d_nsectors == 0) {
1322                 fprintf(stderr, "sectors/track 0\n");
1323                 return (1);
1324         }
1325         if (lp->d_ntracks == 0) {
1326                 fprintf(stderr, "tracks/cylinder 0\n");
1327                 return (1);
1328         }
1329         if  (lp->d_ncylinders == 0) {
1330                 fprintf(stderr, "cylinders/unit 0\n");
1331                 errors++;
1332         }
1333         if (lp->d_rpm == 0)
1334                 Warning("revolutions/minute 0");
1335         if (lp->d_secpercyl == 0)
1336                 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks;
1337         if (lp->d_secperunit == 0)
1338                 lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders;
1339         if (lp->d_bbsize == 0) {
1340                 fprintf(stderr, "boot block size 0\n");
1341                 errors++;
1342         } else if (lp->d_bbsize % lp->d_secsize)
1343                 Warning("boot block size %% sector-size != 0");
1344         if (lp->d_sbsize == 0) {
1345                 fprintf(stderr, "super block size 0\n");
1346                 errors++;
1347         } else if (lp->d_sbsize % lp->d_secsize)
1348                 Warning("super block size %% sector-size != 0");
1349         if (lp->d_npartitions > MAXPARTITIONS)
1350                 Warning("number of partitions (%lu) > MAXPARTITIONS (%d)",
1351                     (u_long)lp->d_npartitions, MAXPARTITIONS);
1352
1353         /* first allocate space to the partitions, then offsets */
1354         total_size = 0; /* in sectors */
1355         total_percent = 0; /* in percent */
1356         hog_part = -1;
1357         /* find all fixed partitions */
1358         for (i = 0; i < lp->d_npartitions; i++) {
1359                 pp = &lp->d_partitions[i];
1360                 if (part_set[i]) {
1361                         if (part_size_type[i] == '*') {
1362                                 if (i == RAW_PART) {
1363                                         pp->p_size = lp->d_secperunit;
1364                                 } else {
1365                                         if (hog_part != -1)
1366                                                 Warning("Too many '*' partitions (%c and %c)",
1367                                                     hog_part + 'a',i + 'a');
1368                                         else
1369                                                 hog_part = i;
1370                                 }
1371                         } else {
1372                                 off_t size;
1373
1374                                 size = pp->p_size;
1375                                 switch (part_size_type[i]) {
1376                                 case '%':
1377                                         total_percent += size;
1378                                         break;
1379                                 case 'k':
1380                                 case 'K':
1381                                         size *= 1024ULL;
1382                                         break;
1383                                 case 'm':
1384                                 case 'M':
1385                                         size *= 1024ULL * 1024ULL;
1386                                         break;
1387                                 case 'g':
1388                                 case 'G':
1389                                         size *= 1024ULL * 1024ULL * 1024ULL;
1390                                         break;
1391                                 case '\0':
1392                                         break;
1393                                 default:
1394                                         Warning("unknown size specifier '%c' (K/M/G are valid)",part_size_type[i]);
1395                                         break;
1396                                 }
1397                                 /* don't count %'s yet */
1398                                 if (part_size_type[i] != '%') {
1399                                         /*
1400                                          * for all not in sectors, convert to
1401                                          * sectors
1402                                          */
1403                                         if (part_size_type[i] != '\0') {
1404                                                 if (size % lp->d_secsize != 0)
1405                                                         Warning("partition %c not an integer number of sectors",
1406                                                             i + 'a');
1407                                                 size /= lp->d_secsize;
1408                                                 pp->p_size = size;
1409                                         }
1410                                         /* else already in sectors */
1411                                         if (i != RAW_PART)
1412                                                 total_size += size;
1413                                 }
1414                         }
1415                 }
1416         }
1417         /* handle % partitions - note %'s don't need to add up to 100! */
1418         if (total_percent != 0) {
1419                 long free_space = lp->d_secperunit - total_size;
1420                 if (total_percent > 100) {
1421                         fprintf(stderr,"total percentage %lu is greater than 100\n",
1422                             total_percent);
1423                         errors++;
1424                 }
1425
1426                 if (free_space > 0) {
1427                         for (i = 0; i < lp->d_npartitions; i++) {
1428                                 pp = &lp->d_partitions[i];
1429                                 if (part_set[i] && part_size_type[i] == '%') {
1430                                         /* careful of overflows! and integer roundoff */
1431                                         pp->p_size = ((double)pp->p_size/100) * free_space;
1432                                         total_size += pp->p_size;
1433
1434                                         /* FIX we can lose a sector or so due to roundoff per
1435                                            partition.  A more complex algorithm could avoid that */
1436                                 }
1437                         }
1438                 } else {
1439                         fprintf(stderr,
1440                             "%ld sectors available to give to '*' and '%%' partitions\n",
1441                             free_space);
1442                         errors++;
1443                         /* fix?  set all % partitions to size 0? */
1444                 }
1445         }
1446         /* give anything remaining to the hog partition */
1447         if (hog_part != -1) {
1448                 lp->d_partitions[hog_part].p_size = lp->d_secperunit - total_size;
1449                 total_size = lp->d_secperunit;
1450         }
1451
1452         /* Now set the offsets for each partition */
1453         current_offset = 0; /* in sectors */
1454         seen_default_offset = 0;
1455         for (i = 0; i < lp->d_npartitions; i++) {
1456                 part = 'a' + i;
1457                 pp = &lp->d_partitions[i];
1458                 if (part_set[i]) {
1459                         if (part_offset_type[i] == '*') {
1460                                 if (i == RAW_PART) {
1461                                         pp->p_offset = 0;
1462                                 } else {
1463                                         pp->p_offset = current_offset;
1464                                         seen_default_offset = 1;
1465                                 }
1466                         } else {
1467                                 /* allow them to be out of order for old-style tables */
1468                                 if (pp->p_offset < current_offset &&
1469                                     seen_default_offset && i != RAW_PART &&
1470                                     pp->p_fstype != FS_VINUM) {
1471                                         fprintf(stderr,
1472 "Offset %ld for partition %c overlaps previous partition which ends at %lu\n",
1473                                             (long)pp->p_offset,i+'a',current_offset);
1474                                         fprintf(stderr,
1475 "Labels with any *'s for offset must be in ascending order by sector\n");
1476                                         errors++;
1477                                 } else if (pp->p_offset != current_offset &&
1478                                     i != RAW_PART && seen_default_offset) {
1479                                         /*
1480                                          * this may give unneeded warnings if
1481                                          * partitions are out-of-order
1482                                          */
1483                                         Warning(
1484 "Offset %ld for partition %c doesn't match expected value %ld",
1485                                             (long)pp->p_offset, i + 'a', current_offset);
1486                                 }
1487                         }
1488                         if (i != RAW_PART)
1489                                 current_offset = pp->p_offset + pp->p_size;
1490                 }
1491         }
1492
1493         for (i = 0; i < lp->d_npartitions; i++) {
1494                 part = 'a' + i;
1495                 pp = &lp->d_partitions[i];
1496                 if (pp->p_size == 0 && pp->p_offset != 0)
1497                         Warning("partition %c: size 0, but offset %lu",
1498                             part, (u_long)pp->p_offset);
1499 #ifdef notdef
1500                 if (pp->p_size % lp->d_secpercyl)
1501                         Warning("partition %c: size %% cylinder-size != 0",
1502                             part);
1503                 if (pp->p_offset % lp->d_secpercyl)
1504                         Warning("partition %c: offset %% cylinder-size != 0",
1505                             part);
1506 #endif
1507                 if (pp->p_offset > lp->d_secperunit) {
1508                         fprintf(stderr,
1509                             "partition %c: offset past end of unit\n", part);
1510                         errors++;
1511                 }
1512                 if (pp->p_offset + pp->p_size > lp->d_secperunit) {
1513                         fprintf(stderr,
1514                         "partition %c: partition extends past end of unit\n",
1515                             part);
1516                         errors++;
1517                 }
1518                 if (i == RAW_PART)
1519                 {
1520                         if (pp->p_fstype != FS_UNUSED)
1521                                 Warning("partition %c is not marked as unused!",part);
1522                         if (pp->p_offset != 0)
1523                                 Warning("partition %c doesn't start at 0!",part);
1524                         if (pp->p_size != lp->d_secperunit)
1525                                 Warning("partition %c doesn't cover the whole unit!",part);
1526
1527                         if ((pp->p_fstype != FS_UNUSED) || (pp->p_offset != 0) ||
1528                             (pp->p_size != lp->d_secperunit)) {
1529                                 Warning("An incorrect partition %c may cause problems for "
1530                                     "standard system utilities",part);
1531                         }
1532                 }
1533
1534                 /* check for overlaps */
1535                 /* this will check for all possible overlaps once and only once */
1536                 for (j = 0; j < i; j++) {
1537                         pp2 = &lp->d_partitions[j];
1538                         if (j != RAW_PART && i != RAW_PART &&
1539                             pp->p_fstype != FS_VINUM &&
1540                             pp2->p_fstype != FS_VINUM &&
1541                             part_set[i] && part_set[j]) {
1542                                 if (pp2->p_offset < pp->p_offset + pp->p_size &&
1543                                     (pp2->p_offset + pp2->p_size > pp->p_offset ||
1544                                         pp2->p_offset >= pp->p_offset)) {
1545                                         fprintf(stderr,"partitions %c and %c overlap!\n",
1546                                             j + 'a', i + 'a');
1547                                         errors++;
1548                                 }
1549                         }
1550                 }
1551         }
1552         for (; i < MAXPARTITIONS; i++) {
1553                 part = 'a' + i;
1554                 pp = &lp->d_partitions[i];
1555                 if (pp->p_size || pp->p_offset)
1556                         Warning("unused partition %c: size %d offset %lu",
1557                             'a' + i, pp->p_size, (u_long)pp->p_offset);
1558         }
1559         return (errors);
1560 }
1561
1562 /*
1563  * When operating on a "virgin" disk, try getting an initial label
1564  * from the associated device driver.  This might work for all device
1565  * drivers that are able to fetch some initial device parameters
1566  * without even having access to a (BSD) disklabel, like SCSI disks,
1567  * most IDE drives, or vn devices.
1568  *
1569  * The device name must be given in its "canonical" form.
1570  */
1571 struct disklabel *
1572 getvirginlabel(void)
1573 {
1574         static struct disklabel lab;
1575         char namebuf[BBSIZE];
1576         int f;
1577
1578         if (dkname[0] == '/') {
1579                 warnx("\"auto\" requires the usage of a canonical disk name");
1580                 return (NULL);
1581         }
1582         (void)snprintf(namebuf, BBSIZE, "%s%s", _PATH_DEV, dkname);
1583         if ((f = open(namebuf, O_RDONLY)) == -1) {
1584                 warn("cannot open %s", namebuf);
1585                 return (NULL);
1586         }
1587
1588         /*
1589          * Try to use the new get-virgin-label ioctl.  If it fails,
1590          * fallback to the old get-disdk-info ioctl.
1591          */
1592         if (ioctl(f, DIOCGDVIRGIN, &lab) < 0) {
1593                 if (ioctl(f, DIOCGDINFO, &lab) < 0) {
1594                         warn("ioctl DIOCGDINFO");
1595                         close(f);
1596                         return (NULL);
1597                 }
1598         }
1599         close(f);
1600         lab.d_boot0 = NULL;
1601         lab.d_boot1 = NULL;
1602         return (&lab);
1603 }
1604
1605 /*
1606  * If we are installing a boot program that doesn't fit in d_bbsize
1607  * we need to mark those partitions that the boot overflows into.
1608  * This allows newfs to prevent creation of a filesystem where it might
1609  * clobber bootstrap code.
1610  */
1611 void
1612 setbootflag(struct disklabel *lp)
1613 {
1614         struct partition *pp;
1615         int i, errors = 0;
1616         char part;
1617         u_long boffset;
1618
1619         if (bootbuf == 0)
1620                 return;
1621         boffset = bootsize / lp->d_secsize;
1622         for (i = 0; i < lp->d_npartitions; i++) {
1623                 part = 'a' + i;
1624                 pp = &lp->d_partitions[i];
1625                 if (pp->p_size == 0)
1626                         continue;
1627                 if (boffset <= pp->p_offset) {
1628                         if (pp->p_fstype == FS_BOOT)
1629                                 pp->p_fstype = FS_UNUSED;
1630                 } else if (pp->p_fstype != FS_BOOT) {
1631                         if (pp->p_fstype != FS_UNUSED) {
1632                                 fprintf(stderr,
1633                                         "boot overlaps used partition %c\n",
1634                                         part);
1635                                 errors++;
1636                         } else {
1637                                 pp->p_fstype = FS_BOOT;
1638                                 Warning("boot overlaps partition %c, %s",
1639                                         part, "marked as FS_BOOT");
1640                         }
1641                 }
1642         }
1643         if (errors)
1644                 errx(4, "cannot install boot program");
1645 }
1646
1647 /*VARARGS1*/
1648 void
1649 Warning(const char *fmt, ...)
1650 {
1651         va_list ap;
1652
1653         fprintf(stderr, "Warning, ");
1654         va_start(ap, fmt);
1655         vfprintf(stderr, fmt, ap);
1656         fprintf(stderr, "\n");
1657         va_end(ap);
1658 }
1659
1660 void
1661 usage(void)
1662 {
1663 #if NUMBOOT > 0
1664         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",
1665                 "usage: disklabel [-r] disk",
1666                 "\t\t(to read label)",
1667                 "       disklabel -w [-r] [-n] disk type [ packid ]",
1668                 "\t\t(to write label with existing boot program)",
1669                 "       disklabel -e [-r] [-n] disk",
1670                 "\t\t(to edit label)",
1671                 "       disklabel -R [-r] [-n] disk protofile",
1672                 "\t\t(to restore label with existing boot program)",
1673 #if NUMBOOT > 1
1674                 "       disklabel -B [-n] [ -b boot1 [ -s boot2 ] ] disk [ type ]",
1675                 "\t\t(to install boot program with existing label)",
1676                 "       disklabel -w -B [-n] [ -b boot1 [ -s boot2 ] ] disk type [ packid ]",
1677                 "\t\t(to write label and boot program)",
1678                 "       disklabel -R -B [-n] [ -b boot1 [ -s boot2 ] ] disk protofile [ type ]",
1679                 "\t\t(to restore label and boot program)",
1680 #else
1681                 "       disklabel -B [-n] [ -b bootprog ] disk [ type ]",
1682                 "\t\t(to install boot program with existing on-disk label)",
1683                 "       disklabel -w -B [-n] [ -b bootprog ] disk type [ packid ]",
1684                 "\t\t(to write label and install boot program)",
1685                 "       disklabel -R -B [-n] [ -b bootprog ] disk protofile [ type ]",
1686                 "\t\t(to restore label and install boot program)",
1687 #endif
1688                 "       disklabel [-NW] disk",
1689                 "\t\t(to write disable/enable label)");
1690 #else
1691         fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
1692                 "usage: disklabel [-r] disk", "(to read label)",
1693                 "       disklabel -w [-r] [-n] disk type [ packid ]",
1694                 "\t\t(to write label)",
1695                 "       disklabel -e [-r] [-n] disk",
1696                 "\t\t(to edit label)",
1697                 "       disklabel -R [-r] [-n] disk protofile",
1698                 "\t\t(to restore label)",
1699                 "       disklabel [-NW] disk",
1700                 "\t\t(to write disable/enable label)");
1701 #endif
1702         exit(1);
1703 }