1 /* $NetBSD: fsck.c,v 1.30 2003/08/07 10:04:15 agc Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-3-Clause 5 * 6 * Copyright (c) 1996 Christos Zoulas. All rights reserved. 7 * Copyright (c) 1980, 1989, 1993, 1994 8 * The Regents of the University of California. All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * From: @(#)mount.c 8.19 (Berkeley) 4/19/94 35 * From: $NetBSD: mount.c,v 1.24 1995/11/18 03:34:29 cgd Exp 36 * $NetBSD: fsck.c,v 1.30 2003/08/07 10:04:15 agc Exp $ 37 */ 38 39 #include <sys/cdefs.h> 40 __FBSDID("$FreeBSD$"); 41 42 #include <sys/param.h> 43 #include <sys/mount.h> 44 #include <sys/queue.h> 45 #include <sys/wait.h> 46 #include <sys/disk.h> 47 #include <sys/ioctl.h> 48 49 #include <ctype.h> 50 #include <err.h> 51 #include <errno.h> 52 #include <fstab.h> 53 #include <fcntl.h> 54 #include <paths.h> 55 #include <signal.h> 56 #include <stdio.h> 57 #include <stdlib.h> 58 #include <string.h> 59 #include <unistd.h> 60 61 #include "fsutil.h" 62 63 static enum { IN_LIST, NOT_IN_LIST } which = NOT_IN_LIST; 64 65 static TAILQ_HEAD(fstypelist, entry) opthead, selhead; 66 67 struct entry { 68 char *type; 69 char *options; 70 TAILQ_ENTRY(entry) entries; 71 }; 72 73 static char *options = NULL; 74 static int flags = 0; 75 static int forceflag = 0; 76 77 static int checkfs(const char *, const char *, const char *, const char *, pid_t *); 78 static int selected(const char *); 79 static void addoption(char *); 80 static const char *getoptions(const char *); 81 static void addentry(struct fstypelist *, const char *, const char *); 82 static void maketypelist(char *); 83 static void catopt(char **, const char *); 84 static void mangle(char *, int *, const char ** volatile *, int *); 85 static const char *getfstype(const char *); 86 static void usage(void) __dead2; 87 static int isok(struct fstab *); 88 89 static struct { 90 const char *ptype; 91 const char *name; 92 } ptype_map[] = { 93 { "ufs", "ffs" }, 94 { "ffs", "ffs" }, 95 { "fat", "msdosfs" }, 96 { "efi", "msdosfs" }, 97 { NULL, NULL }, 98 }; 99 100 int 101 main(int argc, char *argv[]) 102 { 103 struct fstab *fs; 104 int i, rval = 0; 105 const char *vfstype = NULL; 106 char globopt[3]; 107 const char *etc_fstab; 108 109 globopt[0] = '-'; 110 globopt[2] = '\0'; 111 112 TAILQ_INIT(&selhead); 113 TAILQ_INIT(&opthead); 114 115 etc_fstab = NULL; 116 while ((i = getopt(argc, argv, "BCdvpfFnyl:t:T:c:")) != -1) 117 switch (i) { 118 case 'B': 119 if (flags & CHECK_BACKGRD) 120 errx(1, "Cannot specify -B and -F."); 121 flags |= DO_BACKGRD; 122 break; 123 124 case 'd': 125 flags |= CHECK_DEBUG; 126 break; 127 128 case 'v': 129 flags |= CHECK_VERBOSE; 130 break; 131 132 case 'F': 133 if (flags & DO_BACKGRD) 134 errx(1, "Cannot specify -B and -F."); 135 flags |= CHECK_BACKGRD; 136 break; 137 138 case 'p': 139 flags |= CHECK_PREEN; 140 /*FALLTHROUGH*/ 141 case 'C': 142 flags |= CHECK_CLEAN; 143 /*FALLTHROUGH*/ 144 case 'n': 145 case 'y': 146 globopt[1] = i; 147 catopt(&options, globopt); 148 break; 149 150 case 'f': 151 forceflag = 1; 152 globopt[1] = i; 153 catopt(&options, globopt); 154 break; 155 156 case 'l': 157 warnx("Ignoring obsolete -l option\n"); 158 break; 159 160 case 'T': 161 if (*optarg) 162 addoption(optarg); 163 break; 164 165 case 't': 166 if (!TAILQ_EMPTY(&selhead)) 167 errx(1, "only one -t option may be specified."); 168 169 maketypelist(optarg); 170 vfstype = optarg; 171 break; 172 173 case 'c': 174 etc_fstab = optarg; 175 break; 176 177 case '?': 178 default: 179 usage(); 180 /* NOTREACHED */ 181 } 182 183 argc -= optind; 184 argv += optind; 185 186 if (etc_fstab != NULL) 187 setfstab(etc_fstab); 188 189 if (argc == 0) 190 return checkfstab(flags, isok, checkfs); 191 192 #define BADTYPE(type) \ 193 (strcmp(type, FSTAB_RO) && \ 194 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ)) 195 196 197 for (; argc--; argv++) { 198 const char *spec, *mntpt, *type, *cp; 199 char device[MAXPATHLEN]; 200 struct statfs *mntp; 201 202 mntpt = NULL; 203 spec = *argv; 204 cp = strrchr(spec, '/'); 205 if (cp == NULL) { 206 (void)snprintf(device, sizeof(device), "%s%s", 207 _PATH_DEV, spec); 208 spec = device; 209 } 210 mntp = getmntpt(spec); 211 if (mntp != NULL) { 212 spec = mntp->f_mntfromname; 213 mntpt = mntp->f_mntonname; 214 } 215 if ((fs = getfsfile(spec)) == NULL && 216 (fs = getfsspec(spec)) == NULL) { 217 if (vfstype == NULL) 218 vfstype = getfstype(spec); 219 if (vfstype == NULL) 220 vfstype = "ufs"; 221 type = vfstype; 222 devcheck(spec); 223 } else { 224 spec = fs->fs_spec; 225 type = fs->fs_vfstype; 226 mntpt = fs->fs_file; 227 if (BADTYPE(fs->fs_type)) 228 errx(1, "%s has unknown file system type.", 229 spec); 230 } 231 if ((flags & CHECK_BACKGRD) && 232 checkfs(type, spec, mntpt, "-F", NULL) == 0) { 233 printf("%s: DEFER FOR BACKGROUND CHECKING\n", *argv); 234 continue; 235 } 236 if ((flags & DO_BACKGRD) && forceflag == 0 && 237 checkfs(type, spec, mntpt, "-F", NULL) != 0) 238 continue; 239 240 rval |= checkfs(type, spec, mntpt, NULL, NULL); 241 } 242 243 return rval; 244 } 245 246 247 static int 248 isok(struct fstab *fs) 249 { 250 int i; 251 252 if (fs->fs_passno == 0) 253 return (0); 254 if (BADTYPE(fs->fs_type)) 255 return (0); 256 if (!selected(fs->fs_vfstype)) 257 return (0); 258 /* 259 * If the -B flag has been given, then process the needed 260 * background checks. Background checks cannot be run on 261 * file systems that will be mounted read-only or that were 262 * not mounted at boot time (typically those marked `noauto'). 263 * If these basic tests are passed, check with the file system 264 * itself to see if it is willing to do background checking 265 * by invoking its check program with the -F flag. 266 */ 267 if (flags & DO_BACKGRD) { 268 if (!strcmp(fs->fs_type, FSTAB_RO)) 269 return (0); 270 if (getmntpt(fs->fs_spec) == NULL) 271 return (0); 272 if (checkfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file, "-F", 0)) 273 return (0); 274 return (1); 275 } 276 /* 277 * If the -F flag has been given, then consider deferring the 278 * check to background. Background checks cannot be run on 279 * file systems that will be mounted read-only or that will 280 * not be mounted at boot time (e.g., marked `noauto'). If 281 * these basic tests are passed, check with the file system 282 * itself to see if it is willing to defer to background 283 * checking by invoking its check program with the -F flag. 284 */ 285 if ((flags & CHECK_BACKGRD) == 0 || !strcmp(fs->fs_type, FSTAB_RO)) 286 return (1); 287 for (i = strlen(fs->fs_mntops) - 6; i >= 0; i--) 288 if (!strncmp(&fs->fs_mntops[i], "noauto", 6)) 289 break; 290 if (i >= 0) 291 return (1); 292 if (checkfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file, "-F", NULL) != 0) 293 return (1); 294 printf("%s: DEFER FOR BACKGROUND CHECKING\n", fs->fs_spec); 295 return (0); 296 } 297 298 299 static int 300 checkfs(const char *pvfstype, const char *spec, const char *mntpt, 301 const char *auxopt, pid_t *pidp) 302 { 303 const char ** volatile argv; 304 pid_t pid; 305 int argc, i, status, maxargc; 306 char *optbuf, execbase[MAXPATHLEN]; 307 char *vfstype = NULL; 308 const char *extra = NULL; 309 310 #ifdef __GNUC__ 311 /* Avoid vfork clobbering */ 312 (void) &optbuf; 313 (void) &vfstype; 314 #endif 315 /* 316 * We convert the vfstype to lowercase and any spaces to underscores 317 * to not confuse the issue 318 * 319 * XXX This is a kludge to make automatic filesystem type guessing 320 * from the disklabel work for "4.2BSD" filesystems. It does a 321 * very limited subset of transliteration to a normalised form of 322 * filesystem name, and we do not seem to enforce a filesystem 323 * name character set. 324 */ 325 vfstype = strdup(pvfstype); 326 if (vfstype == NULL) 327 perr("strdup(pvfstype)"); 328 for (i = 0; i < (int)strlen(vfstype); i++) { 329 vfstype[i] = tolower(vfstype[i]); 330 if (vfstype[i] == ' ') 331 vfstype[i] = '_'; 332 } 333 334 extra = getoptions(vfstype); 335 optbuf = NULL; 336 if (options) 337 catopt(&optbuf, options); 338 if (extra) 339 catopt(&optbuf, extra); 340 if (auxopt) 341 catopt(&optbuf, auxopt); 342 else if (flags & DO_BACKGRD) 343 catopt(&optbuf, "-B"); 344 345 maxargc = 64; 346 argv = emalloc(sizeof(char *) * maxargc); 347 348 (void) snprintf(execbase, sizeof(execbase), "fsck_%s", vfstype); 349 argc = 0; 350 argv[argc++] = execbase; 351 if (optbuf) 352 mangle(optbuf, &argc, &argv, &maxargc); 353 argv[argc++] = spec; 354 argv[argc] = NULL; 355 356 if (flags & (CHECK_DEBUG|CHECK_VERBOSE)) { 357 (void)printf("start %s %swait", mntpt, 358 pidp ? "no" : ""); 359 for (i = 0; i < argc; i++) 360 (void)printf(" %s", argv[i]); 361 (void)printf("\n"); 362 } 363 364 switch (pid = vfork()) { 365 case -1: /* Error. */ 366 warn("vfork"); 367 if (optbuf) 368 free(optbuf); 369 free(vfstype); 370 return (1); 371 372 case 0: /* Child. */ 373 if ((flags & CHECK_DEBUG) && auxopt == NULL) 374 _exit(0); 375 376 /* Go find an executable. */ 377 execvP(execbase, _PATH_SYSPATH, __DECONST(char * const *, argv)); 378 if (spec) 379 warn("exec %s for %s in %s", execbase, spec, _PATH_SYSPATH); 380 else 381 warn("exec %s in %s", execbase, _PATH_SYSPATH); 382 _exit(1); 383 /* NOTREACHED */ 384 385 default: /* Parent. */ 386 if (optbuf) 387 free(optbuf); 388 389 free(vfstype); 390 391 if (pidp) { 392 *pidp = pid; 393 return 0; 394 } 395 396 if (waitpid(pid, &status, 0) < 0) { 397 warn("waitpid"); 398 return (1); 399 } 400 401 if (WIFEXITED(status)) { 402 if (WEXITSTATUS(status) != 0) 403 return (WEXITSTATUS(status)); 404 } 405 else if (WIFSIGNALED(status)) { 406 warnx("%s: %s", spec, strsignal(WTERMSIG(status))); 407 return (1); 408 } 409 break; 410 } 411 412 return (0); 413 } 414 415 416 static int 417 selected(const char *type) 418 { 419 struct entry *e; 420 421 /* If no type specified, it's always selected. */ 422 TAILQ_FOREACH(e, &selhead, entries) 423 if (!strncmp(e->type, type, MFSNAMELEN)) 424 return which == IN_LIST ? 1 : 0; 425 426 return which == IN_LIST ? 0 : 1; 427 } 428 429 430 static const char * 431 getoptions(const char *type) 432 { 433 struct entry *e; 434 435 TAILQ_FOREACH(e, &opthead, entries) 436 if (!strncmp(e->type, type, MFSNAMELEN)) 437 return e->options; 438 return ""; 439 } 440 441 442 static void 443 addoption(char *optstr) 444 { 445 char *newoptions; 446 struct entry *e; 447 448 if ((newoptions = strchr(optstr, ':')) == NULL) 449 errx(1, "Invalid option string"); 450 451 *newoptions++ = '\0'; 452 453 TAILQ_FOREACH(e, &opthead, entries) 454 if (!strncmp(e->type, optstr, MFSNAMELEN)) { 455 catopt(&e->options, newoptions); 456 return; 457 } 458 addentry(&opthead, optstr, newoptions); 459 } 460 461 462 static void 463 addentry(struct fstypelist *list, const char *type, const char *opts) 464 { 465 struct entry *e; 466 467 e = emalloc(sizeof(struct entry)); 468 e->type = estrdup(type); 469 e->options = estrdup(opts); 470 TAILQ_INSERT_TAIL(list, e, entries); 471 } 472 473 474 static void 475 maketypelist(char *fslist) 476 { 477 char *ptr; 478 479 if ((fslist == NULL) || (fslist[0] == '\0')) 480 errx(1, "empty type list"); 481 482 if (fslist[0] == 'n' && fslist[1] == 'o') { 483 fslist += 2; 484 which = NOT_IN_LIST; 485 } 486 else 487 which = IN_LIST; 488 489 while ((ptr = strsep(&fslist, ",")) != NULL) 490 addentry(&selhead, ptr, ""); 491 492 } 493 494 495 static void 496 catopt(char **sp, const char *o) 497 { 498 char *s; 499 size_t i, j; 500 501 s = *sp; 502 if (s) { 503 i = strlen(s); 504 j = i + 1 + strlen(o) + 1; 505 s = erealloc(s, j); 506 (void)snprintf(s + i, j, ",%s", o); 507 } else 508 s = estrdup(o); 509 *sp = s; 510 } 511 512 513 static void 514 mangle(char *opts, int *argcp, const char ** volatile *argvp, int *maxargcp) 515 { 516 char *p, *s; 517 int argc, maxargc; 518 const char **argv; 519 520 argc = *argcp; 521 argv = *argvp; 522 maxargc = *maxargcp; 523 524 for (s = opts; (p = strsep(&s, ",")) != NULL;) { 525 /* Always leave space for one more argument and the NULL. */ 526 if (argc >= maxargc - 3) { 527 maxargc <<= 1; 528 argv = erealloc(argv, maxargc * sizeof(char *)); 529 } 530 if (*p != '\0') { 531 if (*p == '-') { 532 argv[argc++] = p; 533 p = strchr(p, '='); 534 if (p) { 535 *p = '\0'; 536 argv[argc++] = p+1; 537 } 538 } else { 539 argv[argc++] = "-o"; 540 argv[argc++] = p; 541 } 542 } 543 } 544 545 *argcp = argc; 546 *argvp = argv; 547 *maxargcp = maxargc; 548 } 549 550 static const char * 551 getfstype(const char *str) 552 { 553 struct diocgattr_arg attr; 554 int fd, i; 555 556 if ((fd = open(str, O_RDONLY)) == -1) 557 err(1, "cannot open `%s'", str); 558 559 strncpy(attr.name, "PART::type", sizeof(attr.name)); 560 memset(&attr.value, 0, sizeof(attr.value)); 561 attr.len = sizeof(attr.value); 562 if (ioctl(fd, DIOCGATTR, &attr) == -1) { 563 (void) close(fd); 564 return(NULL); 565 } 566 (void) close(fd); 567 for (i = 0; ptype_map[i].ptype != NULL; i++) 568 if (strstr(attr.value.str, ptype_map[i].ptype) != NULL) 569 return (ptype_map[i].name); 570 return (NULL); 571 } 572 573 574 static void 575 usage(void) 576 { 577 static const char common[] = 578 "[-Cdfnpvy] [-B | -F] [-T fstype:fsoptions] [-t fstype] [-c fstab]"; 579 580 (void)fprintf(stderr, "usage: %s %s [special | node] ...\n", 581 getprogname(), common); 582 exit(1); 583 } 584