diskpart.c revision 1.18
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. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 #ifndef lint 32 __COPYRIGHT("@(#) Copyright (c) 1983, 1988, 1993\ 33 The Regents of the University of California. All rights reserved."); 34 #endif /* not lint */ 35 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "from: @(#)diskpart.c 8.3 (Berkeley) 11/30/94"; 39 #else 40 __RCSID("$NetBSD: diskpart.c,v 1.18 2009/04/15 05:41:09 lukem Exp $"); 41 #endif 42 #endif /* not lint */ 43 44 /* 45 * Program to calculate standard disk partition sizes. 46 */ 47 #include <sys/param.h> 48 #define DKTYPENAMES 49 #include <sys/disklabel.h> 50 51 #include <ctype.h> 52 #include <disktab.h> 53 #include <limits.h> 54 #include <stdio.h> 55 #include <stdlib.h> 56 #include <string.h> 57 #include <unistd.h> 58 59 #define for_now /* show all of `c' partition for disklabel */ 60 #define NPARTITIONS 8 61 #define PART(x) (x - 'a') 62 63 /* 64 * Default partition sizes, where they exist. 65 */ 66 #define NDEFAULTS 4 67 int defpart[NDEFAULTS][NPARTITIONS] = { 68 { 15884, 66880, 0, 15884, 307200, 0, 0, 291346 }, /* ~ 356+ Mbytes */ 69 { 15884, 33440, 0, 15884, 55936, 0, 0, 291346 }, /* ~ 206-355 Mbytes */ 70 { 15884, 33440, 0, 15884, 55936, 0, 0, 0 }, /* ~ 61-205 Mbytes */ 71 { 15884, 10032, 0, 15884, 0, 0, 0, 0 }, /* ~ 20-60 Mbytes */ 72 }; 73 74 /* 75 * Each array defines a layout for a disk; 76 * that is, the collection of partitions totally 77 * covers the physical space on a disk. 78 */ 79 #define NLAYOUTS 3 80 char layouts[NLAYOUTS][NPARTITIONS] = { 81 { 'a', 'b', 'h', 'g' }, 82 { 'a', 'b', 'h', 'd', 'e', 'f' }, 83 { 'c' }, 84 }; 85 86 /* 87 * Default disk block and disk block fragment 88 * sizes for each file system. Those file systems 89 * with zero block and frag sizes are special cases 90 * (e.g. swap areas or for access to the entire device). 91 */ 92 struct partition defparam[NPARTITIONS] = { 93 { 0, 0, { 1024 }, FS_UNUSED, 8, { 0 }, }, /* a */ 94 { 0, 0, { 1024 }, FS_SWAP, 8, { 0 }, }, /* b */ 95 { 0, 0, { 1024 }, FS_UNUSED, 8, { 0 }, }, /* c */ 96 { 0, 0, { 512 }, FS_UNUSED, 8, { 0 }, }, /* d */ 97 { 0, 0, { 1024 }, FS_UNUSED, 8, { 0 }, }, /* e */ 98 { 0, 0, { 1024 }, FS_UNUSED, 8, { 0 }, }, /* f */ 99 { 0, 0, { 1024 }, FS_UNUSED, 8, { 0 }, }, /* g */ 100 { 0, 0, { 1024 }, FS_UNUSED, 8, { 0 }, } /* h */ 101 }; 102 103 /* 104 * Each disk has some space reserved for a bad sector 105 * forwarding table. DEC standard 144 uses the first 106 * 5 even numbered sectors in the last track of the 107 * last cylinder for replicated storage of the bad sector 108 * table; another 126 sectors past this is needed as a 109 * pool of replacement sectors. 110 */ 111 int badsecttable = 126; /* # sectors */ 112 113 int pflag; /* print device driver partition tables */ 114 int dflag; /* print disktab entry */ 115 116 int gettype __P((const char *, const char *const *)); 117 int main __P((int, char **)); 118 struct disklabel *promptfordisk __P((const char *)); 119 void usage __P((void)); 120 121 int 122 main(argc, argv) 123 int argc; 124 char *argv[]; 125 { 126 struct disklabel *dp; 127 int spc, def, part, layout, j, ch; 128 uint32_t curcyl; 129 int threshhold, numcyls[NPARTITIONS], startcyl[NPARTITIONS]; 130 off_t totsize = 0; 131 const char *tyname; 132 char *lp; 133 134 while ((ch = getopt(argc, argv, "pds:")) != -1) { 135 switch (ch) { 136 case 'd': 137 dflag++; 138 break; 139 140 case 'p': 141 pflag++; 142 break; 143 144 case 's': 145 totsize = strtoul(optarg, &lp, 10); 146 if (*lp != '\0') 147 usage(); 148 break; 149 150 case '?': 151 default: 152 usage(); 153 /* NOTREACHED */ 154 } 155 } 156 argc -= optind; 157 argv += optind; 158 159 if (argc != 1) { 160 usage(); 161 /* NOTREACHED */ 162 } 163 164 dp = getdiskbyname(*argv); 165 if (dp == NULL) { 166 if (isatty(0)) 167 dp = promptfordisk(*argv); 168 if (dp == NULL) { 169 fprintf(stderr, "%s: unknown disk type\n", *argv); 170 exit(1); 171 } 172 } 173 if (dp->d_flags & D_REMOVABLE) 174 tyname = "removable"; 175 else if (dp->d_flags & D_RAMDISK) 176 tyname = "simulated"; 177 else 178 tyname = "winchester"; 179 spc = dp->d_secpercyl; 180 /* 181 * Bad sector table contains one track for the replicated 182 * copies of the table and enough full tracks preceding 183 * the last track to hold the pool of free blocks to which 184 * bad sectors are mapped. 185 * If disk size was specified explicitly, use specified size. 186 */ 187 if (dp->d_type == DTYPE_SMD && dp->d_flags & D_BADSECT && 188 totsize == 0) { 189 badsecttable = dp->d_nsectors + 190 roundup(badsecttable, dp->d_nsectors); 191 threshhold = howmany(spc, badsecttable); 192 } else { 193 badsecttable = 0; 194 threshhold = 0; 195 } 196 /* 197 * If disk size was specified, recompute number of cylinders 198 * that may be used, and set badsecttable to any remaining 199 * fraction of the last cylinder. 200 */ 201 if (totsize != 0) { 202 dp->d_ncylinders = howmany(totsize, spc); 203 badsecttable = spc * dp->d_ncylinders - totsize; 204 } 205 206 /* 207 * Figure out if disk is large enough for 208 * expanded swap area and 'd', 'e', and 'f' 209 * partitions. Otherwise, use smaller defaults 210 * based on RK07. 211 */ 212 for (def = 0; def < NDEFAULTS; def++) { 213 curcyl = 0; 214 for (part = PART('a'); part < NPARTITIONS; part++) 215 curcyl += howmany(defpart[def][part], spc); 216 if (curcyl < dp->d_ncylinders - threshhold) 217 break; 218 } 219 if (def >= NDEFAULTS) { 220 fprintf(stderr, "%s: disk too small, calculate by hand\n", 221 *argv); 222 exit(1); 223 } 224 225 /* 226 * Calculate number of cylinders allocated to each disk 227 * partition. We may waste a bit of space here, but it's 228 * in the interest of (very backward) compatibility 229 * (for mixed disk systems). 230 */ 231 for (curcyl = 0, part = PART('a'); part < NPARTITIONS; part++) { 232 numcyls[part] = 0; 233 if (defpart[def][part] != 0) { 234 numcyls[part] = howmany(defpart[def][part], spc); 235 curcyl += numcyls[part]; 236 } 237 } 238 numcyls[PART('f')] = dp->d_ncylinders - curcyl; 239 numcyls[PART('g')] = 240 numcyls[PART('d')] + numcyls[PART('e')] + numcyls[PART('f')]; 241 numcyls[PART('c')] = dp->d_ncylinders; 242 defpart[def][PART('f')] = numcyls[PART('f')] * spc - badsecttable; 243 defpart[def][PART('g')] = numcyls[PART('g')] * spc - badsecttable; 244 defpart[def][PART('c')] = numcyls[PART('c')] * spc; 245 #ifndef for_now 246 if (totsize || !pflag) 247 #else 248 if (totsize) 249 #endif 250 defpart[def][PART('c')] -= badsecttable; 251 252 /* 253 * Calculate starting cylinder number for each partition. 254 * Note the 'h' partition is physically located before the 255 * 'g' or 'd' partition. This is reflected in the layout 256 * arrays defined above. 257 */ 258 for (layout = 0; layout < NLAYOUTS; layout++) { 259 curcyl = 0; 260 for (lp = layouts[layout]; *lp != 0; lp++) { 261 startcyl[PART(*lp)] = curcyl; 262 curcyl += numcyls[PART(*lp)]; 263 } 264 } 265 266 if (pflag) { 267 printf("}, %s_sizes[%d] = {\n", dp->d_typename, NPARTITIONS); 268 for (part = PART('a'); part < NPARTITIONS; part++) { 269 if (numcyls[part] == 0) { 270 printf("\t0,\t0,\n"); 271 continue; 272 } 273 if (dp->d_type != DTYPE_MSCP) { 274 printf("\t%d,\t%d,\t\t/* %c=cyl %d thru %d */\n", 275 defpart[def][part], startcyl[part], 276 'A' + part, startcyl[part], 277 startcyl[part] + numcyls[part] - 1); 278 continue; 279 } 280 printf("\t%d,\t%d,\t\t/* %c=sectors %d thru %d */\n", 281 defpart[def][part], spc * startcyl[part], 282 'A' + part, spc * startcyl[part], 283 spc * startcyl[part] + defpart[def][part] - 1); 284 } 285 exit(0); 286 } 287 if (dflag) { 288 int nparts; 289 290 /* 291 * In case the disk is in the ``in-between'' range 292 * where the 'g' partition is smaller than the 'h' 293 * partition, reverse the frag sizes so the /usr partition 294 * is always set up with a frag size larger than the 295 * user's partition. 296 */ 297 if (defpart[def][PART('g')] < defpart[def][PART('h')]) { 298 int temp; 299 300 temp = defparam[PART('h')].p_fsize; 301 defparam[PART('h')].p_fsize = 302 defparam[PART('g')].p_fsize; 303 defparam[PART('g')].p_fsize = temp; 304 } 305 printf("%s:\\\n", dp->d_typename); 306 printf("\t:ty=%s:ns#%d:nt#%d:nc#%d:", tyname, 307 dp->d_nsectors, dp->d_ntracks, dp->d_ncylinders); 308 if (dp->d_secpercyl != dp->d_nsectors * dp->d_ntracks) 309 printf("sc#%d:", dp->d_secpercyl); 310 if (dp->d_type == DTYPE_SMD && dp->d_flags & D_BADSECT) 311 printf("sf:"); 312 printf("\\\n\t:dt=%s:", dktypenames[dp->d_type]); 313 for (part = NDDATA - 1; part >= 0; part--) 314 if (dp->d_drivedata[part]) 315 break; 316 for (j = 0; j <= part; j++) 317 printf("d%d#%d:", j, dp->d_drivedata[j]); 318 printf("\\\n"); 319 for (nparts = 0, part = PART('a'); part < NPARTITIONS; part++) 320 if (defpart[def][part] != 0) 321 nparts++; 322 for (part = PART('a'); part < NPARTITIONS; part++) { 323 if (defpart[def][part] == 0) 324 continue; 325 printf("\t:p%c#%d:", 'a' + part, defpart[def][part]); 326 printf("o%c#%d:b%c#%d:f%c#%d:", 327 'a' + part, spc * startcyl[part], 328 'a' + part, 329 defparam[part].p_frag * defparam[part].p_fsize, 330 'a' + part, defparam[part].p_fsize); 331 if (defparam[part].p_fstype == FS_SWAP) 332 printf("t%c=swap:", 'a' + part); 333 nparts--; 334 printf("%s\n", nparts > 0 ? "\\" : ""); 335 } 336 #ifdef for_now 337 defpart[def][PART('c')] -= badsecttable; 338 part = PART('c'); 339 printf("#\t:p%c#%d:", 'a' + part, defpart[def][part]); 340 printf("o%c#%d:b%c#%d:f%c#%d:\n", 341 'a' + part, spc * startcyl[part], 342 'a' + part, 343 defparam[part].p_frag * defparam[part].p_fsize, 344 'a' + part, defparam[part].p_fsize); 345 #endif 346 exit(0); 347 } 348 printf("%s: #sectors/track=%d, #tracks/cylinder=%d #cylinders=%d\n", 349 dp->d_typename, dp->d_nsectors, dp->d_ntracks, 350 dp->d_ncylinders); 351 printf("\n Partition\t Size\t Offset\t Range\n"); 352 for (part = PART('a'); part < NPARTITIONS; part++) { 353 printf("\t%c\t", 'a' + part); 354 if (numcyls[part] == 0) { 355 printf(" unused\n"); 356 continue; 357 } 358 printf("%7d\t%7d\t%4d - %d%s\n", 359 defpart[def][part], startcyl[part] * spc, 360 startcyl[part], startcyl[part] + numcyls[part] - 1, 361 defpart[def][part] % spc ? "*" : ""); 362 } 363 exit(0); 364 } 365 366 struct disklabel disk; 367 368 struct field { 369 const char *f_name; 370 const char *f_defaults; 371 u_int32_t *f_location; 372 } fields[] = { 373 { "sector size", "512", &disk.d_secsize }, 374 { "#sectors/track", NULL, &disk.d_nsectors }, 375 { "#tracks/cylinder", NULL, &disk.d_ntracks }, 376 { "#cylinders", NULL, &disk.d_ncylinders }, 377 { NULL, NULL, 0 }, 378 }; 379 380 struct disklabel * 381 promptfordisk(name) 382 const char *name; 383 { 384 struct disklabel *dp = &disk; 385 struct field *fp; 386 int i; 387 const char *const *tp; 388 char buf[BUFSIZ], *cp; 389 390 strncpy(dp->d_typename, name, sizeof(dp->d_typename)); 391 fprintf(stderr, 392 "%s: unknown disk type, want to supply parameters (y/n)? ", 393 name); 394 if ((fgets(buf, BUFSIZ, stdin) == NULL) || buf[0] != 'y') 395 return ((struct disklabel *)0); 396 for (;;) { 397 fprintf(stderr, "Disk/controller type (%s)? ", dktypenames[1]); 398 if (fgets(buf, BUFSIZ, stdin) == NULL) 399 return ((struct disklabel *)0); 400 if ((cp = strchr(buf, '\n')) != NULL) 401 *cp = '\0'; 402 if (buf[0] == '\0') { 403 dp->d_type = 1; 404 break; 405 } 406 if ((i = gettype(buf, dktypenames)) >= 0) { 407 dp->d_type = i; 408 break; 409 } 410 fprintf(stderr, "%s: unrecognized controller type\n", buf); 411 fprintf(stderr, "use one of:\n"); 412 for (tp = dktypenames; *tp; tp++) 413 if (strchr(*tp, ' ') == 0) 414 fprintf(stderr, "\t%s\n", *tp); 415 } 416 gettype: 417 dp->d_flags = 0; 418 fprintf(stderr, "type (winchester|removable|simulated)? "); 419 if (fgets(buf, BUFSIZ, stdin) == NULL) 420 return ((struct disklabel *)0); 421 if ((cp = strchr(buf, '\n')) != NULL) 422 *cp = '\0'; 423 if (buf[0] == '\0') 424 goto gettype; 425 switch (buf[0]) { 426 case 'r': 427 dp->d_flags = D_REMOVABLE; 428 break; 429 case 's': 430 dp->d_flags = D_RAMDISK; 431 break; 432 case 'w': 433 break; 434 default: 435 fprintf(stderr, "%s: bad disk type\n", buf); 436 /* FALLTHROUGH */ 437 case '\0': 438 goto gettype; 439 } 440 fprintf(stderr, "(type <cr> to get default value, if only one)\n"); 441 if (dp->d_type == DTYPE_SMD) { 442 fprintf(stderr, 443 "Do '%s' disks support bad144 bad block forwarding (yes)? ", 444 dp->d_typename); 445 if (fgets(buf, BUFSIZ, stdin) == NULL) 446 return ((struct disklabel *)0); 447 if (buf[0] != 'n') 448 dp->d_flags |= D_BADSECT; 449 } 450 for (fp = fields; fp->f_name != NULL; fp++) { 451 again: 452 fprintf(stderr, "%s ", fp->f_name); 453 if (fp->f_defaults != NULL) 454 fprintf(stderr, "(%s)", fp->f_defaults); 455 fprintf(stderr, "? "); 456 if (fgets(buf, BUFSIZ, stdin) == NULL) 457 return ((struct disklabel *)0); 458 if ((cp = strchr(buf, '\n')) != NULL) 459 *cp = '\0'; 460 cp = buf; 461 if (*cp == '\0') { 462 if (fp->f_defaults == NULL) { 463 fprintf(stderr, "no default value\n"); 464 goto again; 465 } 466 /* XXX __UNCONST */ 467 cp = __UNCONST(fp->f_defaults); 468 } 469 *fp->f_location = atol(cp); 470 if (*fp->f_location == 0) { 471 fprintf(stderr, "%s: bad value\n", cp); 472 goto again; 473 } 474 } 475 fprintf(stderr, "sectors/cylinder (%d)? ", 476 dp->d_nsectors * dp->d_ntracks); 477 if (fgets(buf, BUFSIZ, stdin) == NULL) 478 return ((struct disklabel *)0); 479 if ((cp = strchr(buf, '\n')) != NULL) 480 *cp = '\0'; 481 if (buf[0] == 0) 482 dp->d_secpercyl = dp->d_nsectors * dp->d_ntracks; 483 else 484 dp->d_secpercyl = atol(buf); 485 fprintf(stderr, "Drive-type-specific parameters, <cr> to terminate:\n"); 486 for (i = 0; i < NDDATA; i++) { 487 fprintf(stderr, "d%d? ", i); 488 if (fgets(buf, BUFSIZ, stdin) == NULL) 489 return ((struct disklabel *)0); 490 if ((cp = strchr(buf, '\n')) != NULL) 491 *cp = '\0'; 492 if (buf[0] == 0) 493 break; 494 dp->d_drivedata[i] = atol(buf); 495 } 496 return (dp); 497 } 498 499 int 500 gettype(t, names) 501 const char *t; 502 const char *const *names; 503 { 504 const char *const *nm; 505 506 for (nm = names; *nm; nm++) 507 if (strcasecmp(t, *nm) == 0) 508 return (nm - names); 509 if (isdigit((unsigned char)*t)) 510 return (atoi(t)); 511 return (-1); 512 } 513 514 void 515 usage(void) 516 { 517 (void)fprintf(stderr, "usage: diskpart [-dp] [-s size] disk-type\n"); 518 exit(1); 519 } 520
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