usr.sbin/diskpart/diskpart.c

   1 /*
   2  * Copyright (c) 1983, 1988, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * @(#) Copyright (c) 1983, 1988, 1993 The Regents of the University of California.  All rights reserved.
  34  * @(#)diskpart.c       8.3 (Berkeley) 11/30/94
  35  * $FreeBSD: src/usr.sbin/diskpart/diskpart.c,v 1.11.2.2 2002/12/04 16:24:08 roam Exp $
  36  * $DragonFly: src/usr.sbin/diskpart/Attic/diskpart.c,v 1.7 2005/03/16 17:54:59 y0netan1 Exp $
  37  */
  38
  39 /*
  40  * Program to calculate standard disk partition sizes.
  41  */
  42 #include <sys/param.h>
  43 #define DKTYPENAMES
  44 #include <sys/disklabel.h>
  45
  46 #include <ctype.h>
  47 #include <err.h>
  48 #include <stdio.h>
  49 #include <unistd.h>
  50
  51 #define for_now                 /* show all of `c' partition for disklabel */
  52 #define NPARTITIONS     8
  53 #define PART(x)         (x - 'a')
  54
  55 /*
  56  * Default partition sizes, where they exist.
  57  */
  58 #define NDEFAULTS       4
  59 int     defpart[NDEFAULTS][NPARTITIONS] = {
  60    { 15884, 66880, 0, 15884, 307200, 0, 0, 291346 },    /* ~ 356+ Mbytes */
  61    { 15884, 33440, 0, 15884, 55936, 0, 0, 291346 },     /* ~ 206-355 Mbytes */
  62    { 15884, 33440, 0, 15884, 55936, 0, 0, 0 },          /* ~ 61-205 Mbytes */
  63    { 15884, 10032, 0, 15884, 0, 0, 0, 0 },              /* ~ 20-60 Mbytes */
  64 };
  65
  66 /*
  67  * Each array defines a layout for a disk;
  68  * that is, the collection of partitions totally
  69  * covers the physical space on a disk.
  70  */
  71 #define NLAYOUTS        3
  72 char    layouts[NLAYOUTS][NPARTITIONS] = {
  73    { 'a', 'b', 'h', 'g' },
  74    { 'a', 'b', 'h', 'd', 'e', 'f' },
  75    { 'c' },
  76 };
  77
  78 /*
  79  * Default disk block and disk block fragment
  80  * sizes for each file system.  Those file systems
  81  * with zero block and frag sizes are special cases
  82  * (e.g. swap areas or for access to the entire device).
  83  */
  84 struct  partition defparam[NPARTITIONS] = {
  85         { 0, 0, 1024, FS_UNUSED, 8, 0 },                /* a */
  86         { 0, 0, 1024, FS_SWAP,   8, 0 },                /* b */
  87         { 0, 0, 1024, FS_UNUSED, 8, 0 },                /* c */
  88         { 0, 0,  512, FS_UNUSED, 8, 0 },                /* d */
  89         { 0, 0, 1024, FS_UNUSED, 8, 0 },                /* e */
  90         { 0, 0, 1024, FS_UNUSED, 8, 0 },                /* f */
  91         { 0, 0, 1024, FS_UNUSED, 8, 0 },                /* g */
  92         { 0, 0, 1024, FS_UNUSED, 8, 0 }                 /* h */
  93 };
  94
  95 /*
  96  * Each disk has some space reserved for a bad sector
  97  * forwarding table.  DEC standard 144 uses the first
  98  * 5 even numbered sectors in the last track of the
  99  * last cylinder for replicated storage of the bad sector
 100  * table; another 126 sectors past this is needed as a
 101  * pool of replacement sectors.
 102  */
 103 int     badsecttable = 126;     /* # sectors */
 104
 105 int     pflag;                  /* print device driver partition tables */
 106 int     dflag;                  /* print disktab entry */
 107
 108 struct  disklabel *promptfordisk();
 109 static void usage(void);
 110
 111 int
 112 main(int argc, char **argv)
 113 {
 114         struct disklabel *dp;
 115         int curcyl, spc, def, part, layout, j;
 116         int threshhold, numcyls[NPARTITIONS], startcyl[NPARTITIONS];
 117         int totsize = 0;
 118         char *lp, *tyname;
 119         int ch;
 120
 121         while ((ch = getopt(argc, argv, "dps:")) != EOF)
 122                 switch (ch) {
 123                         case 'd':
 124                                 dflag++;
 125                                 break;
 126
 127                         case 'p':
 128                                 pflag++;
 129                                 break;
 130
 131                         case 's':
 132                                 totsize = atoi(optarg);
 133                                 break;
 134                 }
 135         argc -= optind;
 136         argv += optind;
 137
 138         if (dflag && pflag)
 139                 usage();
 140         if (argc < 1)
 141                 usage();
 142         dp = getdiskbyname(*argv);
 143         if (dp == NULL) {
 144                 if (isatty(0))
 145                         dp = promptfordisk(*argv);
 146                 if (dp == NULL)
 147                         errx(2, "%s: unknown disk type", *argv);
 148         } else {
 149                 if (dp->d_flags & D_REMOVABLE)
 150                         tyname = "removable";
 151                 else if (dp->d_flags & D_RAMDISK)
 152                         tyname = "simulated";
 153                 else
 154                         tyname = "winchester";
 155         }
 156         spc = dp->d_secpercyl;
 157         /*
 158          * Bad sector table contains one track for the replicated
 159          * copies of the table and enough full tracks preceding
 160          * the last track to hold the pool of free blocks to which
 161          * bad sectors are mapped.
 162          * If disk size was specified explicitly, use specified size.
 163          */
 164         if (dp->d_type == DTYPE_SMD && dp->d_flags & D_BADSECT &&
 165             totsize == 0) {
 166                 badsecttable = dp->d_nsectors +
 167                     roundup(badsecttable, dp->d_nsectors);
 168                 threshhold = howmany(spc, badsecttable);
 169         } else {
 170                 badsecttable = 0;
 171                 threshhold = 0;
 172         }
 173         /*
 174          * If disk size was specified, recompute number of cylinders
 175          * that may be used, and set badsecttable to any remaining
 176          * fraction of the last cylinder.
 177          */
 178         if (totsize != 0) {
 179                 dp->d_ncylinders = howmany(totsize, spc);
 180                 badsecttable = spc * dp->d_ncylinders - totsize;
 181         }
 182
 183         /*
 184          * Figure out if disk is large enough for
 185          * expanded swap area and 'd', 'e', and 'f'
 186          * partitions.  Otherwise, use smaller defaults
 187          * based on RK07.
 188          */
 189         for (def = 0; def < NDEFAULTS; def++) {
 190                 curcyl = 0;
 191                 for (part = PART('a'); part < NPARTITIONS; part++)
 192                         curcyl += howmany(defpart[def][part], spc);
 193                 if (curcyl < dp->d_ncylinders - threshhold)
 194                         break;
 195         }
 196         if (def >= NDEFAULTS)
 197                 errx(3, "%s: disk too small, calculate by hand", *argv);
 198
 199         /*
 200          * Calculate number of cylinders allocated to each disk
 201          * partition.  We may waste a bit of space here, but it's
 202          * in the interest of (very backward) compatibility
 203          * (for mixed disk systems).
 204          */
 205         for (curcyl = 0, part = PART('a'); part < NPARTITIONS; part++) {
 206                 numcyls[part] = 0;
 207                 if (defpart[def][part] != 0) {
 208                         numcyls[part] = howmany(defpart[def][part], spc);
 209                         curcyl += numcyls[part];
 210                 }
 211         }
 212         numcyls[PART('f')] = dp->d_ncylinders - curcyl;
 213         numcyls[PART('g')] =
 214                 numcyls[PART('d')] + numcyls[PART('e')] + numcyls[PART('f')];
 215         numcyls[PART('c')] = dp->d_ncylinders;
 216         defpart[def][PART('f')] = numcyls[PART('f')] * spc - badsecttable;
 217         defpart[def][PART('g')] = numcyls[PART('g')] * spc - badsecttable;
 218         defpart[def][PART('c')] = numcyls[PART('c')] * spc;
 219 #ifndef for_now
 220         if (totsize || !pflag)
 221 #else
 222         if (totsize)
 223 #endif
 224                 defpart[def][PART('c')] -= badsecttable;
 225
 226         /*
 227          * Calculate starting cylinder number for each partition.
 228          * Note the 'h' partition is physically located before the
 229          * 'g' or 'd' partition.  This is reflected in the layout
 230          * arrays defined above.
 231          */
 232         for (layout = 0; layout < NLAYOUTS; layout++) {
 233                 curcyl = 0;
 234                 for (lp = layouts[layout]; *lp != 0; lp++) {
 235                         startcyl[PART(*lp)] = curcyl;
 236                         curcyl += numcyls[PART(*lp)];
 237                 }
 238         }
 239
 240         if (pflag) {
 241                 printf("}, %s_sizes[%d] = {\n", dp->d_typename, NPARTITIONS);
 242                 for (part = PART('a'); part < NPARTITIONS; part++) {
 243                         if (numcyls[part] == 0) {
 244                                 printf("\t0,\t0,\n");
 245                                 continue;
 246                         }
 247                         if (dp->d_type != DTYPE_MSCP) {
 248                                printf("\t%d,\t%d,\t\t/* %c=cyl %d thru %d */\n",
 249                                         defpart[def][part], startcyl[part],
 250                                         'A' + part, startcyl[part],
 251                                         startcyl[part] + numcyls[part] - 1);
 252                                 continue;
 253                         }
 254                         printf("\t%d,\t%d,\t\t/* %c=sectors %d thru %d */\n",
 255                                 defpart[def][part], spc * startcyl[part],
 256                                 'A' + part, spc * startcyl[part],
 257                                 spc * startcyl[part] + defpart[def][part] - 1);
 258                 }
 259                 exit(0);
 260         }
 261         if (dflag) {
 262                 int nparts;
 263
 264                 /*
 265                  * In case the disk is in the ``in-between'' range
 266                  * where the 'g' partition is smaller than the 'h'
 267                  * partition, reverse the frag sizes so the /usr partition
 268                  * is always set up with a frag size larger than the
 269                  * user's partition.
 270                  */
 271                 if (defpart[def][PART('g')] < defpart[def][PART('h')]) {
 272                         int temp;
 273
 274                         temp = defparam[PART('h')].p_fsize;
 275                         defparam[PART('h')].p_fsize =
 276                                 defparam[PART('g')].p_fsize;
 277                         defparam[PART('g')].p_fsize = temp;
 278                 }
 279                 printf("%s:\\\n", dp->d_typename);
 280                 printf("\t:ty=%s:ns#%d:nt#%d:nc#%d:", tyname,
 281                         dp->d_nsectors, dp->d_ntracks, dp->d_ncylinders);
 282                 if (dp->d_secpercyl != dp->d_nsectors * dp->d_ntracks)
 283                         printf("sc#%d:", dp->d_secpercyl);
 284                 if (dp->d_type == DTYPE_SMD && dp->d_flags & D_BADSECT)
 285                         printf("sf:");
 286                 printf("\\\n\t:dt=%s:", dktypenames[dp->d_type]);
 287                 for (part = NDDATA - 1; part >= 0; part--)
 288                         if (dp->d_drivedata[part])
 289                                 break;
 290                 for (j = 0; j <= part; j++)
 291                         printf("d%d#%d:", j, dp->d_drivedata[j]);
 292                 printf("\\\n");
 293                 for (nparts = 0, part = PART('a'); part < NPARTITIONS; part++)
 294                         if (defpart[def][part] != 0)
 295                                 nparts++;
 296                 for (part = PART('a'); part < NPARTITIONS; part++) {
 297                         if (defpart[def][part] == 0)
 298                                 continue;
 299                         printf("\t:p%c#%d:", 'a' + part, defpart[def][part]);
 300                         printf("o%c#%d:b%c#%d:f%c#%d:",
 301                             'a' + part, spc * startcyl[part],
 302                             'a' + part,
 303                             defparam[part].p_frag * defparam[part].p_fsize,
 304                             'a' + part, defparam[part].p_fsize);
 305                         if (defparam[part].p_fstype == FS_SWAP)
 306                                 printf("t%c=swap:", 'a' + part);
 307                         nparts--;
 308                         printf("%s\n", nparts > 0 ? "\\" : "");
 309                 }
 310 #ifdef for_now
 311                 defpart[def][PART('c')] -= badsecttable;
 312                 part = PART('c');
 313                 printf("#\t:p%c#%d:", 'a' + part, defpart[def][part]);
 314                 printf("o%c#%d:b%c#%d:f%c#%d:\n",
 315                     'a' + part, spc * startcyl[part],
 316                     'a' + part,
 317                     defparam[part].p_frag * defparam[part].p_fsize,
 318                     'a' + part, defparam[part].p_fsize);
 319 #endif
 320                 exit(0);
 321         }
 322         printf("%s: #sectors/track=%d, #tracks/cylinder=%d #cylinders=%d\n",
 323                 dp->d_typename, dp->d_nsectors, dp->d_ntracks,
 324                 dp->d_ncylinders);
 325         printf("\n    Partition\t   Size\t Offset\t   Range\n");
 326         for (part = PART('a'); part < NPARTITIONS; part++) {
 327                 printf("\t%c\t", 'a' + part);
 328                 if (numcyls[part] == 0) {
 329                         printf(" unused\n");
 330                         continue;
 331                 }
 332                 printf("%7d\t%7d\t%4d - %d%s\n",
 333                         defpart[def][part], startcyl[part] * spc,
 334                         startcyl[part], startcyl[part] + numcyls[part] - 1,
 335                         defpart[def][part] % spc ? "*" : "");
 336         }
 337 }
 338
 339 static void
 340 usage(void)
 341 {
 342         fprintf(stderr, "usage: diskpart [-p] [-d] [-s size] disk-type\n");
 343         exit(1);
 344 }
 345
 346 struct disklabel disk;
 347
 348 struct  field {
 349         char            *f_name;
 350         char            *f_defaults;
 351         u_int32_t       *f_location;
 352 } fields[] = {
 353         { "sector size",                "512",  &disk.d_secsize },
 354         { "#sectors/track",             0,      &disk.d_nsectors },
 355         { "#tracks/cylinder",           0,      &disk.d_ntracks },
 356         { "#cylinders",                 0,      &disk.d_ncylinders },
 357         { 0, 0, 0 },
 358 };
 359
 360 char *
 361 mygets(char *buf)
 362 {
 363         size_t len;
 364
 365         if (fgets(buf, BUFSIZ, stdin) == NULL)
 366                 buf[0] = '\0';
 367         len = strlen(buf);
 368         if (len != 0 && buf[len - 1] == '\n')
 369                 buf[len - 1] = '\0';
 370         return (buf);
 371 }
 372
 373 struct disklabel *
 374 promptfordisk(char *name)
 375 {
 376         struct disklabel *dp = &disk;
 377         struct field *fp;
 378         int i;
 379         char buf[BUFSIZ], *cp;
 380         const char **tp;
 381
 382         strncpy(dp->d_typename, name, sizeof(dp->d_typename));
 383         fprintf(stderr,
 384                 "%s: unknown disk type, want to supply parameters (y/n)? ",
 385                 name);
 386         mygets(buf);
 387         if (*buf != 'y')
 388                 return ((struct disklabel *)0);
 389         for (;;) {
 390                 fprintf(stderr, "Disk/controller type (%s)? ", dktypenames[1]);
 391                 mygets(buf);
 392                 if (buf[0] == 0) {
 393                         dp->d_type = 1;
 394                         break;
 395                 }
 396                 if ((i = gettype(buf, dktypenames)) >= 0) {
 397                         dp->d_type = i;
 398                         break;
 399                 }
 400                 fprintf(stderr, "%s: unrecognized controller type\n", buf);
 401                 fprintf(stderr, "use one of:\n");
 402                 for (tp = dktypenames; *tp; tp++)
 403                         if (strchr(*tp, ' ') == 0)
 404                                 fprintf(stderr, "\t%s\n", *tp);
 405         }
 406 gettype:
 407         dp->d_flags = 0;
 408         fprintf(stderr, "type (winchester|removable|simulated)? ");
 409         mygets(buf);
 410         if (strcmp(buf, "removable") == 0)
 411                 dp->d_flags = D_REMOVABLE;
 412         else if (strcmp(buf, "simulated") == 0)
 413                 dp->d_flags = D_RAMDISK;
 414         else if (strcmp(buf, "winchester")) {
 415                 fprintf(stderr, "%s: bad disk type\n", buf);
 416                 goto gettype;
 417         }
 418         strncpy(dp->d_typename, buf, sizeof(dp->d_typename));
 419         fprintf(stderr, "(type <cr> to get default value, if only one)\n");
 420         if (dp->d_type == DTYPE_SMD)
 421            fprintf(stderr, "Do %ss support bad144 bad block forwarding (yes)? ",
 422                 dp->d_typename);
 423         mygets(buf);
 424         if (*buf != 'n')
 425                 dp->d_flags |= D_BADSECT;
 426         for (fp = fields; fp->f_name != NULL; fp++) {
 427 again:
 428                 fprintf(stderr, "%s ", fp->f_name);
 429                 if (fp->f_defaults != NULL)
 430                         fprintf(stderr, "(%s)", fp->f_defaults);
 431                 fprintf(stderr, "? ");
 432                 cp = mygets(buf);
 433                 if (*cp == '\0') {
 434                         if (fp->f_defaults == NULL) {
 435                                 fprintf(stderr, "no default value\n");
 436                                 goto again;
 437                         }
 438                         cp = fp->f_defaults;
 439                 }
 440                 *fp->f_location = atol(cp);
 441                 if (*fp->f_location == 0) {
 442                         fprintf(stderr, "%s: bad value\n", cp);
 443                         goto again;
 444                 }
 445         }
 446         fprintf(stderr, "sectors/cylinder (%d)? ",
 447             dp->d_nsectors * dp->d_ntracks);
 448         mygets(buf);
 449         if (buf[0] == 0)
 450                 dp->d_secpercyl = dp->d_nsectors * dp->d_ntracks;
 451         else
 452                 dp->d_secpercyl = atol(buf);
 453         fprintf(stderr, "Drive-type-specific parameters, <cr> to terminate:\n");
 454         for (i = 0; i < NDDATA; i++) {
 455                 fprintf(stderr, "d%d? ", i);
 456                 mygets(buf);
 457                 if (buf[0] == 0)
 458                         break;
 459                 dp->d_drivedata[i] = atol(buf);
 460         }
 461         return (dp);
 462 }
 463
 464 int
 465 gettype(const char *t, const char **names)
 466 {
 467         const char **nm;
 468
 469         for (nm = names; *nm; nm++)
 470                 if (ustrcmp(t, *nm) == 0)
 471                         return (nm - names);
 472         if (isdigit(*t))
 473                 return (atoi(t));
 474         return (-1);
 475 }
 476
 477 ustrcmp(char *s1, char *s2)
 478 {
 479 #define lower(c)        (islower(c) ? (c) : tolower(c))
 480
 481         for (; *s1; s1++, s2++) {
 482                 if (*s1 == *s2)
 483                         continue;
 484                 if (isalpha(*s1) && isalpha(*s2) &&
 485                     lower(*s1) == lower(*s2))
 486                         continue;
 487                 return (*s2 - *s1);
 488         }
 489         return (0);
 490 }