diskpart.c revision 1.8
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 34 #ifndef lint 35 static char copyright[] = 36 "@(#) Copyright (c) 1983, 1988, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 /* static char sccsid[] = "from: @(#)diskpart.c 8.3 (Berkeley) 11/30/94"; */ 42 static char rcsid[] = "$NetBSD: diskpart.c,v 1.8 1997/06/21 09:07:09 lukem Exp $"; 43 #endif /* not lint */ 44 45 /* 46 * Program to calculate standard disk partition sizes. 47 */ 48 #include <sys/param.h> 49 #define DKTYPENAMES 50 #include <sys/disklabel.h> 51 52 #include <ctype.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 struct disklabel *promptfordisk __P((const char *)); 117 void usage __P((void)); 118 int gettype __P((const char *, char **)); 119 120 int 121 main(argc, argv) 122 int argc; 123 char *argv[]; 124 { 125 126 struct disklabel *dp; 127 int curcyl, spc, def, part, layout, j, ch; 128 int threshhold, numcyls[NPARTITIONS], startcyl[NPARTITIONS]; 129 off_t totsize = 0; 130 char *lp, *tyname; 131 132 while ((ch = getopt(argc, argv, "pds:")) != -1) { 133 switch (ch) { 134 case 'd': 135 dflag++; 136 break; 137 138 case 'p': 139 pflag++; 140 break; 141 142 case 's': 143 totsize = strtoul(optarg, &lp, 10); 144 if (*lp != '\0') 145 usage(); 146 break; 147 148 case '?': 149 default: 150 usage(); 151 /* NOTREACHED */ 152 } 153 } 154 argc -= optind; 155 argv += optind; 156 157 if (argc != 1) { 158 usage(); 159 /* NOTREACHED */ 160 } 161 162 dp = getdiskbyname(*argv); 163 if (dp == NULL) { 164 if (isatty(0)) 165 dp = promptfordisk(*argv); 166 if (dp == NULL) { 167 fprintf(stderr, "%s: unknown disk type\n", *argv); 168 exit(1); 169 } 170 } 171 if (dp->d_flags & D_REMOVABLE) 172 tyname = "removable"; 173 else if (dp->d_flags & D_RAMDISK) 174 tyname = "simulated"; 175 else 176 tyname = "winchester"; 177 spc = dp->d_secpercyl; 178 /* 179 * Bad sector table contains one track for the replicated 180 * copies of the table and enough full tracks preceding 181 * the last track to hold the pool of free blocks to which 182 * bad sectors are mapped. 183 * If disk size was specified explicitly, use specified size. 184 */ 185 if (dp->d_type == DTYPE_SMD && dp->d_flags & D_BADSECT && 186 totsize == 0) { 187 badsecttable = dp->d_nsectors + 188 roundup(badsecttable, dp->d_nsectors); 189 threshhold = howmany(spc, badsecttable); 190 } else { 191 badsecttable = 0; 192 threshhold = 0; 193 } 194 /* 195 * If disk size was specified, recompute number of cylinders 196 * that may be used, and set badsecttable to any remaining 197 * fraction of the last cylinder. 198 */ 199 if (totsize != 0) { 200 dp->d_ncylinders = howmany(totsize, spc); 201 badsecttable = spc * dp->d_ncylinders - totsize; 202 } 203 204 /* 205 * Figure out if disk is large enough for 206 * expanded swap area and 'd', 'e', and 'f' 207 * partitions. Otherwise, use smaller defaults 208 * based on RK07. 209 */ 210 for (def = 0; def < NDEFAULTS; def++) { 211 curcyl = 0; 212 for (part = PART('a'); part < NPARTITIONS; part++) 213 curcyl += howmany(defpart[def][part], spc); 214 if (curcyl < dp->d_ncylinders - threshhold) 215 break; 216 } 217 if (def >= NDEFAULTS) { 218 fprintf(stderr, "%s: disk too small, calculate by hand\n", 219 *argv); 220 exit(1); 221 } 222 223 /* 224 * Calculate number of cylinders allocated to each disk 225 * partition. We may waste a bit of space here, but it's 226 * in the interest of (very backward) compatibility 227 * (for mixed disk systems). 228 */ 229 for (curcyl = 0, part = PART('a'); part < NPARTITIONS; part++) { 230 numcyls[part] = 0; 231 if (defpart[def][part] != 0) { 232 numcyls[part] = howmany(defpart[def][part], spc); 233 curcyl += numcyls[part]; 234 } 235 } 236 numcyls[PART('f')] = dp->d_ncylinders - curcyl; 237 numcyls[PART('g')] = 238 numcyls[PART('d')] + numcyls[PART('e')] + numcyls[PART('f')]; 239 numcyls[PART('c')] = dp->d_ncylinders; 240 defpart[def][PART('f')] = numcyls[PART('f')] * spc - badsecttable; 241 defpart[def][PART('g')] = numcyls[PART('g')] * spc - badsecttable; 242 defpart[def][PART('c')] = numcyls[PART('c')] * spc; 243 #ifndef for_now 244 if (totsize || !pflag) 245 #else 246 if (totsize) 247 #endif 248 defpart[def][PART('c')] -= badsecttable; 249 250 /* 251 * Calculate starting cylinder number for each partition. 252 * Note the 'h' partition is physically located before the 253 * 'g' or 'd' partition. This is reflected in the layout 254 * arrays defined above. 255 */ 256 for (layout = 0; layout < NLAYOUTS; layout++) { 257 curcyl = 0; 258 for (lp = layouts[layout]; *lp != 0; lp++) { 259 startcyl[PART(*lp)] = curcyl; 260 curcyl += numcyls[PART(*lp)]; 261 } 262 } 263 264 if (pflag) { 265 printf("}, %s_sizes[%d] = {\n", dp->d_typename, NPARTITIONS); 266 for (part = PART('a'); part < NPARTITIONS; part++) { 267 if (numcyls[part] == 0) { 268 printf("\t0,\t0,\n"); 269 continue; 270 } 271 if (dp->d_type != DTYPE_MSCP) { 272 printf("\t%d,\t%d,\t\t/* %c=cyl %d thru %d */\n", 273 defpart[def][part], startcyl[part], 274 'A' + part, startcyl[part], 275 startcyl[part] + numcyls[part] - 1); 276 continue; 277 } 278 printf("\t%d,\t%d,\t\t/* %c=sectors %d thru %d */\n", 279 defpart[def][part], spc * startcyl[part], 280 'A' + part, spc * startcyl[part], 281 spc * startcyl[part] + defpart[def][part] - 1); 282 } 283 exit(0); 284 } 285 if (dflag) { 286 int nparts; 287 288 /* 289 * In case the disk is in the ``in-between'' range 290 * where the 'g' partition is smaller than the 'h' 291 * partition, reverse the frag sizes so the /usr partition 292 * is always set up with a frag size larger than the 293 * user's partition. 294 */ 295 if (defpart[def][PART('g')] < defpart[def][PART('h')]) { 296 int temp; 297 298 temp = defparam[PART('h')].p_fsize; 299 defparam[PART('h')].p_fsize = 300 defparam[PART('g')].p_fsize; 301 defparam[PART('g')].p_fsize = temp; 302 } 303 printf("%s:\\\n", dp->d_typename); 304 printf("\t:ty=%s:ns#%d:nt#%d:nc#%d:", tyname, 305 dp->d_nsectors, dp->d_ntracks, dp->d_ncylinders); 306 if (dp->d_secpercyl != dp->d_nsectors * dp->d_ntracks) 307 printf("sc#%d:", dp->d_secpercyl); 308 if (dp->d_type == DTYPE_SMD && dp->d_flags & D_BADSECT) 309 printf("sf:"); 310 printf("\\\n\t:dt=%s:", dktypenames[dp->d_type]); 311 for (part = NDDATA - 1; part >= 0; part--) 312 if (dp->d_drivedata[part]) 313 break; 314 for (j = 0; j <= part; j++) 315 printf("d%d#%d:", j, dp->d_drivedata[j]); 316 printf("\\\n"); 317 for (nparts = 0, part = PART('a'); part < NPARTITIONS; part++) 318 if (defpart[def][part] != 0) 319 nparts++; 320 for (part = PART('a'); part < NPARTITIONS; part++) { 321 if (defpart[def][part] == 0) 322 continue; 323 printf("\t:p%c#%d:", 'a' + part, defpart[def][part]); 324 printf("o%c#%d:b%c#%d:f%c#%d:", 325 'a' + part, spc * startcyl[part], 326 'a' + part, 327 defparam[part].p_frag * defparam[part].p_fsize, 328 'a' + part, defparam[part].p_fsize); 329 if (defparam[part].p_fstype == FS_SWAP) 330 printf("t%c=swap:", 'a' + part); 331 nparts--; 332 printf("%s\n", nparts > 0 ? "\\" : ""); 333 } 334 #ifdef for_now 335 defpart[def][PART('c')] -= badsecttable; 336 part = PART('c'); 337 printf("#\t:p%c#%d:", 'a' + part, defpart[def][part]); 338 printf("o%c#%d:b%c#%d:f%c#%d:\n", 339 'a' + part, spc * startcyl[part], 340 'a' + part, 341 defparam[part].p_frag * defparam[part].p_fsize, 342 'a' + part, defparam[part].p_fsize); 343 #endif 344 exit(0); 345 } 346 printf("%s: #sectors/track=%d, #tracks/cylinder=%d #cylinders=%d\n", 347 dp->d_typename, dp->d_nsectors, dp->d_ntracks, 348 dp->d_ncylinders); 349 printf("\n Partition\t Size\t Offset\t Range\n"); 350 for (part = PART('a'); part < NPARTITIONS; part++) { 351 printf("\t%c\t", 'a' + part); 352 if (numcyls[part] == 0) { 353 printf(" unused\n"); 354 continue; 355 } 356 printf("%7d\t%7d\t%4d - %d%s\n", 357 defpart[def][part], startcyl[part] * spc, 358 startcyl[part], startcyl[part] + numcyls[part] - 1, 359 defpart[def][part] % spc ? "*" : ""); 360 } 361 exit(0); 362 } 363 364 struct disklabel disk; 365 366 struct field { 367 char *f_name; 368 char *f_defaults; 369 u_int32_t *f_location; 370 } fields[] = { 371 { "sector size", "512", &disk.d_secsize }, 372 { "#sectors/track", 0, &disk.d_nsectors }, 373 { "#tracks/cylinder", 0, &disk.d_ntracks }, 374 { "#cylinders", 0, &disk.d_ncylinders }, 375 { 0, 0, 0 }, 376 }; 377 378 struct disklabel * 379 promptfordisk(name) 380 const char *name; 381 { 382 struct disklabel *dp = &disk; 383 struct field *fp; 384 int i; 385 char buf[BUFSIZ], **tp, *cp; 386 387 strncpy(dp->d_typename, name, sizeof(dp->d_typename)); 388 fprintf(stderr, 389 "%s: unknown disk type, want to supply parameters (y/n)? ", 390 name); 391 if ((fgets(buf, BUFSIZ, stdin) == NULL) || buf[0] != 'y') 392 return ((struct disklabel *)0); 393 for (;;) { 394 fprintf(stderr, "Disk/controller type (%s)? ", dktypenames[1]); 395 if (fgets(buf, BUFSIZ, stdin) == NULL) 396 return ((struct disklabel *)0); 397 if ((cp = strchr(buf, '\n')) != NULL) 398 *cp = '\0'; 399 if (buf[0] == '\0') { 400 dp->d_type = 1; 401 break; 402 } 403 if ((i = gettype(buf, dktypenames)) >= 0) { 404 dp->d_type = i; 405 break; 406 } 407 fprintf(stderr, "%s: unrecognized controller type\n", buf); 408 fprintf(stderr, "use one of:\n"); 409 for (tp = dktypenames; *tp; tp++) 410 if (strchr(*tp, ' ') == 0) 411 fprintf(stderr, "\t%s\n", *tp); 412 } 413 gettype: 414 dp->d_flags = 0; 415 fprintf(stderr, "type (winchester|removable|simulated)? "); 416 if (fgets(buf, BUFSIZ, stdin) == NULL) 417 return ((struct disklabel *)0); 418 if ((cp = strchr(buf, '\n')) != NULL) 419 *cp = '\0'; 420 if (buf[0] == '\0') 421 goto gettype; 422 switch (buf[0]) { 423 case 'r': 424 dp->d_flags = D_REMOVABLE; 425 break; 426 case 's': 427 dp->d_flags = D_RAMDISK; 428 break; 429 case 'w': 430 break; 431 default: 432 fprintf(stderr, "%s: bad disk type\n", buf); 433 /* FALLTHROUGH */ 434 case '\0': 435 goto gettype; 436 } 437 fprintf(stderr, "(type <cr> to get default value, if only one)\n"); 438 if (dp->d_type == DTYPE_SMD) { 439 fprintf(stderr, 440 "Do '%s' disks support bad144 bad block forwarding (yes)? ", 441 dp->d_typename); 442 if (fgets(buf, BUFSIZ, stdin) == NULL) 443 return ((struct disklabel *)0); 444 if (buf[0] != 'n') 445 dp->d_flags |= D_BADSECT; 446 } 447 for (fp = fields; fp->f_name != NULL; fp++) { 448 again: 449 fprintf(stderr, "%s ", fp->f_name); 450 if (fp->f_defaults != NULL) 451 fprintf(stderr, "(%s)", fp->f_defaults); 452 fprintf(stderr, "? "); 453 if (fgets(buf, BUFSIZ, stdin) == NULL) 454 return ((struct disklabel *)0); 455 if ((cp = strchr(buf, '\n')) != NULL) 456 *cp = '\0'; 457 cp = buf; 458 if (*cp == '\0') { 459 if (fp->f_defaults == NULL) { 460 fprintf(stderr, "no default value\n"); 461 goto again; 462 } 463 cp = fp->f_defaults; 464 } 465 *fp->f_location = atol(cp); 466 if (*fp->f_location == 0) { 467 fprintf(stderr, "%s: bad value\n", cp); 468 goto again; 469 } 470 } 471 fprintf(stderr, "sectors/cylinder (%d)? ", 472 dp->d_nsectors * dp->d_ntracks); 473 if (fgets(buf, BUFSIZ, stdin) == NULL) 474 return ((struct disklabel *)0); 475 if ((cp = strchr(buf, '\n')) != NULL) 476 *cp = '\0'; 477 if (buf[0] == 0) 478 dp->d_secpercyl = dp->d_nsectors * dp->d_ntracks; 479 else 480 dp->d_secpercyl = atol(buf); 481 fprintf(stderr, "Drive-type-specific parameters, <cr> to terminate:\n"); 482 for (i = 0; i < NDDATA; i++) { 483 fprintf(stderr, "d%d? ", i); 484 if (fgets(buf, BUFSIZ, stdin) == NULL) 485 return ((struct disklabel *)0); 486 if ((cp = strchr(buf, '\n')) != NULL) 487 *cp = '\0'; 488 if (buf[0] == 0) 489 break; 490 dp->d_drivedata[i] = atol(buf); 491 } 492 return (dp); 493 } 494 495 int 496 gettype(t, names) 497 const char *t; 498 char **names; 499 { 500 char **nm; 501 502 for (nm = names; *nm; nm++) 503 if (strcasecmp(t, *nm) == 0) 504 return (nm - names); 505 if (isdigit(*t)) 506 return (atoi(t)); 507 return (-1); 508 } 509 510 void 511 usage(void) 512 { 513 (void)fprintf(stderr, "Usage: diskpart [-dp] [-s size] disk-type\n"); 514 exit(1); 515 } 516
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