1 /* $NetBSD: fsck.c,v 1.46 2007/07/17 20:12:40 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1996 Christos Zoulas. All rights reserved. 5 * Copyright (c) 1980, 1989, 1993, 1994 6 * The Regents of the University of California. All rights reserved. 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. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * From: @(#)mount.c 8.19 (Berkeley) 4/19/94 33 * From: NetBSD: mount.c,v 1.24 1995/11/18 03:34:29 cgd Exp 34 * 35 */ 36 37 #include <sys/cdefs.h> 38 #ifndef lint 39 __RCSID("$NetBSD: fsck.c,v 1.46 2007/07/17 20:12:40 christos Exp $"); 40 #endif /* not lint */ 41 42 #include <sys/param.h> 43 #include <sys/mount.h> 44 #include <sys/queue.h> 45 #include <sys/wait.h> 46 #define FSTYPENAMES 47 #define FSCKNAMES 48 #include <sys/disk.h> 49 #include <sys/disklabel.h> 50 #include <sys/ioctl.h> 51 52 #include <err.h> 53 #include <errno.h> 54 #include <fstab.h> 55 #include <fcntl.h> 56 #include <paths.h> 57 #include <signal.h> 58 #include <stdio.h> 59 #include <stdlib.h> 60 #include <string.h> 61 #include <unistd.h> 62 #include <util.h> 63 64 #include "pathnames.h" 65 #include "fsutil.h" 66 67 static enum { IN_LIST, NOT_IN_LIST } which = NOT_IN_LIST; 68 69 TAILQ_HEAD(fstypelist, entry) opthead, selhead; 70 71 struct entry { 72 char *type; 73 char *options; 74 TAILQ_ENTRY(entry) entries; 75 }; 76 77 static int maxrun = 0; 78 static char *options = NULL; 79 static int flags = 0; 80 81 static int checkfs(const char *, const char *, const char *, void *, pid_t *); 82 static int selected(const char *); 83 static void addoption(char *); 84 static const char *getoptions(const char *); 85 static void addentry(struct fstypelist *, const char *, const char *); 86 static void maketypelist(char *); 87 static void catopt(char **, const char *); 88 static void mangle(char *, int *, const char ** volatile *, int *); 89 static const char *getfslab(const char *); 90 static void usage(void); 91 static void *isok(struct fstab *); 92 93 int 94 main(int argc, char *argv[]) 95 { 96 struct fstab *fs; 97 int i, rval = 0; 98 const char *vfstype = NULL; 99 char globopt[3]; 100 101 globopt[0] = '-'; 102 globopt[2] = '\0'; 103 104 TAILQ_INIT(&selhead); 105 TAILQ_INIT(&opthead); 106 107 while ((i = getopt(argc, argv, "dfl:nPpqT:t:vy")) != -1) { 108 switch (i) { 109 case 'd': 110 flags |= CHECK_DEBUG; 111 continue; 112 113 case 'f': 114 flags |= CHECK_FORCE; 115 break; 116 117 case 'n': 118 flags |= CHECK_NOFIX; 119 break; 120 121 case 'p': 122 flags |= CHECK_PREEN; 123 break; 124 125 case 'P': 126 flags |= CHECK_PROGRESS; 127 break; 128 129 case 'q': 130 break; 131 132 case 'l': 133 maxrun = atoi(optarg); 134 continue; 135 136 case 'T': 137 if (*optarg) 138 addoption(optarg); 139 continue; 140 141 case 't': 142 if (TAILQ_FIRST(&selhead) != NULL) 143 errx(1, "only one -t option may be specified."); 144 145 maketypelist(optarg); 146 vfstype = optarg; 147 continue; 148 149 case 'v': 150 flags |= CHECK_VERBOSE; 151 continue; 152 153 case 'y': 154 break; 155 156 case '?': 157 default: 158 usage(); 159 /* NOTREACHED */ 160 } 161 162 /* Pass option to fsck_xxxfs */ 163 globopt[1] = i; 164 catopt(&options, globopt); 165 } 166 167 /* Don't do progress meters if we're debugging. */ 168 if (flags & CHECK_DEBUG) 169 flags &= ~CHECK_PROGRESS; 170 171 /* 172 * If progress meters are being used, force max parallel to 1 173 * so the progress meter outputs don't interfere with one another. 174 */ 175 if (flags & CHECK_PROGRESS) 176 maxrun = 1; 177 178 argc -= optind; 179 argv += optind; 180 181 if (argc == 0) 182 return checkfstab(flags, maxrun, isok, checkfs); 183 184 #define BADTYPE(type) \ 185 (strcmp(type, FSTAB_RO) && \ 186 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ)) 187 188 189 for (; argc--; argv++) { 190 const char *spec, *type, *cp; 191 char device[MAXPATHLEN]; 192 193 spec = *argv; 194 cp = strrchr(spec, '/'); 195 if (cp == 0) { 196 (void)snprintf(device, sizeof(device), "%s%s", 197 _PATH_DEV, spec); 198 spec = device; 199 } 200 if ((fs = getfsfile(spec)) == NULL && 201 (fs = getfsspec(spec)) == NULL) { 202 if (vfstype == NULL) 203 vfstype = getfslab(spec); 204 type = vfstype; 205 } 206 else { 207 spec = fs->fs_spec; 208 type = fs->fs_vfstype; 209 if (BADTYPE(fs->fs_type)) 210 errx(1, "%s has unknown file system type.", 211 spec); 212 } 213 214 rval |= checkfs(type, blockcheck(spec), *argv, NULL, NULL); 215 } 216 217 return rval; 218 } 219 220 221 static void * 222 isok(struct fstab *fs) 223 { 224 225 if (fs->fs_passno == 0) 226 return NULL; 227 228 if (BADTYPE(fs->fs_type)) 229 return NULL; 230 231 if (!selected(fs->fs_vfstype)) 232 return NULL; 233 234 return fs; 235 } 236 237 238 static int 239 checkfs(const char *vfst, const char *spec, const char *mntpt, void *auxarg, 240 pid_t *pidp) 241 { 242 /* List of directories containing fsck_xxx subcommands. */ 243 static const char *edirs[] = { 244 #ifdef RESCUEDIR 245 RESCUEDIR, 246 #endif 247 _PATH_SBIN, 248 _PATH_USRSBIN, 249 NULL 250 }; 251 const char ** volatile argv, **edir; 252 const char * volatile vfstype = vfst; 253 pid_t pid; 254 int argc, i, status, maxargc; 255 char *optb; 256 char *volatile optbuf; 257 char execname[MAXPATHLEN + 1], execbase[MAXPATHLEN]; 258 const char *extra = getoptions(vfstype); 259 260 if (!strcmp(vfstype, "ufs")) 261 vfstype = MOUNT_UFS; 262 263 optb = NULL; 264 if (options) 265 catopt(&optb, options); 266 if (extra) 267 catopt(&optb, extra); 268 optbuf = optb; 269 270 maxargc = 64; 271 argv = emalloc(sizeof(char *) * maxargc); 272 273 (void) snprintf(execbase, sizeof(execbase), "fsck_%s", vfstype); 274 argc = 0; 275 argv[argc++] = execbase; 276 if (optbuf) 277 mangle(optbuf, &argc, &argv, &maxargc); 278 argv[argc++] = spec; 279 argv[argc] = NULL; 280 281 if (flags & (CHECK_DEBUG|CHECK_VERBOSE)) { 282 (void)printf("start %s %swait", mntpt, 283 pidp ? "no" : ""); 284 for (i = 0; i < argc; i++) 285 (void)printf(" %s", argv[i]); 286 (void)printf("\n"); 287 } 288 289 switch (pid = vfork()) { 290 case -1: /* Error. */ 291 warn("vfork"); 292 if (optbuf) 293 free(optbuf); 294 free(argv); 295 return (1); 296 297 case 0: /* Child. */ 298 if ((flags & CHECK_FORCE) == 0) { 299 struct statvfs sfs; 300 301 /* 302 * if mntpt is a mountpoint of a mounted file 303 * system and it's mounted read-write, skip it 304 * unless -f is given. 305 */ 306 if ((statvfs(mntpt, &sfs) == 0) && 307 (strcmp(mntpt, sfs.f_mntonname) == 0) && 308 ((sfs.f_flag & MNT_RDONLY) == 0)) { 309 printf( 310 "%s: file system is mounted read-write on %s; not checking\n", 311 spec, mntpt); 312 if ((flags & CHECK_PREEN) && auxarg != NULL) 313 _exit(0); /* fsck -p */ 314 else 315 _exit(1); /* fsck [[-p] ...] */ 316 } 317 } 318 319 if (flags & CHECK_DEBUG) 320 _exit(0); 321 322 /* Go find an executable. */ 323 edir = edirs; 324 do { 325 (void)snprintf(execname, 326 sizeof(execname), "%s/%s", *edir, execbase); 327 execv(execname, (char * const *)__UNCONST(argv)); 328 if (errno != ENOENT) { 329 if (spec) 330 warn("exec %s for %s", execname, spec); 331 else 332 warn("exec %s", execname); 333 } 334 } while (*++edir != NULL); 335 336 if (errno == ENOENT) { 337 if (spec) 338 warn("exec %s for %s", execname, spec); 339 else 340 warn("exec %s", execname); 341 } 342 _exit(1); 343 /* NOTREACHED */ 344 345 default: /* Parent. */ 346 if (optbuf) 347 free(optbuf); 348 free(argv); 349 350 if (pidp) { 351 *pidp = pid; 352 return 0; 353 } 354 355 if (waitpid(pid, &status, 0) < 0) { 356 warn("waitpid"); 357 return (1); 358 } 359 360 if (WIFEXITED(status)) { 361 if (WEXITSTATUS(status) != 0) 362 return (WEXITSTATUS(status)); 363 } 364 else if (WIFSIGNALED(status)) { 365 warnx("%s: %s", spec, strsignal(WTERMSIG(status))); 366 return (1); 367 } 368 break; 369 } 370 371 return (0); 372 } 373 374 375 static int 376 selected(const char *type) 377 { 378 struct entry *e; 379 380 /* If no type specified, it's always selected. */ 381 TAILQ_FOREACH(e, &selhead, entries) 382 if (!strcmp(e->type, type)) 383 return which == IN_LIST ? 1 : 0; 384 385 return which == IN_LIST ? 0 : 1; 386 } 387 388 389 static const char * 390 getoptions(const char *type) 391 { 392 struct entry *e; 393 394 TAILQ_FOREACH(e, &opthead, entries) 395 if (!strcmp(e->type, type)) 396 return e->options; 397 return ""; 398 } 399 400 401 static void 402 addoption(char *optstr) 403 { 404 char *newoptions; 405 struct entry *e; 406 407 if ((newoptions = strchr(optstr, ':')) == NULL) 408 errx(1, "Invalid option string"); 409 410 *newoptions++ = '\0'; 411 412 TAILQ_FOREACH(e, &opthead, entries) 413 if (!strcmp(e->type, optstr)) { 414 catopt(&e->options, newoptions); 415 return; 416 } 417 addentry(&opthead, optstr, newoptions); 418 } 419 420 421 static void 422 addentry(struct fstypelist *list, const char *type, const char *opts) 423 { 424 struct entry *e; 425 426 e = emalloc(sizeof(struct entry)); 427 e->type = estrdup(type); 428 e->options = estrdup(opts); 429 TAILQ_INSERT_TAIL(list, e, entries); 430 } 431 432 433 static void 434 maketypelist(char *fslist) 435 { 436 char *ptr; 437 438 if ((fslist == NULL) || (fslist[0] == '\0')) 439 errx(1, "empty type list"); 440 441 if (fslist[0] == 'n' && fslist[1] == 'o') { 442 fslist += 2; 443 which = NOT_IN_LIST; 444 } 445 else 446 which = IN_LIST; 447 448 while ((ptr = strsep(&fslist, ",")) != NULL) 449 addentry(&selhead, ptr, ""); 450 451 } 452 453 454 static void 455 catopt(char **sp, const char *o) 456 { 457 char *s; 458 size_t i, j; 459 460 s = *sp; 461 if (s) { 462 i = strlen(s); 463 j = i + 1 + strlen(o) + 1; 464 s = erealloc(s, j); 465 (void)snprintf(s + i, j, ",%s", o); 466 } else 467 s = estrdup(o); 468 *sp = s; 469 } 470 471 472 static void 473 mangle(char *opts, int *argcp, const char ** volatile *argvp, int *maxargcp) 474 { 475 char *p, *s; 476 int argc, maxargc; 477 const char **argv; 478 479 argc = *argcp; 480 argv = *argvp; 481 maxargc = *maxargcp; 482 483 for (s = opts; (p = strsep(&s, ",")) != NULL;) { 484 /* Always leave space for one more argument and the NULL. */ 485 if (argc >= maxargc - 3) { 486 maxargc <<= 1; 487 argv = erealloc(argv, maxargc * sizeof(char *)); 488 } 489 if (*p != '\0') { 490 if (*p == '-') { 491 argv[argc++] = p; 492 p = strchr(p, '='); 493 if (p) { 494 *p = '\0'; 495 argv[argc++] = p+1; 496 } 497 } else { 498 argv[argc++] = "-o"; 499 argv[argc++] = p; 500 } 501 } 502 } 503 504 *argcp = argc; 505 *argvp = argv; 506 *maxargcp = maxargc; 507 } 508 509 static const char * 510 getfslab(const char *str) 511 { 512 static struct dkwedge_info dkw; 513 struct disklabel dl; 514 int fd; 515 char p; 516 const char *vfstype; 517 u_char t; 518 519 /* deduce the file system type from the disk label */ 520 if ((fd = open(str, O_RDONLY)) == -1) 521 err(1, "cannot open `%s'", str); 522 523 /* First check to see if it's a wedge. */ 524 if (ioctl(fd, DIOCGWEDGEINFO, &dkw) == 0) { 525 /* Yup, this is easy. */ 526 (void) close(fd); 527 return (dkw.dkw_ptype); 528 } 529 530 if (ioctl(fd, DIOCGDINFO, &dl) == -1) 531 err(1, "cannot get disklabel for `%s'", str); 532 533 (void) close(fd); 534 535 p = str[strlen(str) - 1]; 536 537 if ((p - 'a') >= dl.d_npartitions) 538 errx(1, "partition `%s' is not defined on disk", str); 539 540 if ((t = dl.d_partitions[p - 'a'].p_fstype) >= FSMAXTYPES) 541 errx(1, "partition `%s' is not of a legal vfstype", 542 str); 543 544 if ((vfstype = fscknames[t]) == NULL) 545 errx(1, "vfstype `%s' on partition `%s' is not supported", 546 fstypenames[t], str); 547 548 return vfstype; 549 } 550 551 552 static void 553 usage(void) 554 { 555 static const char common[] = 556 "[-dfnPpqvy] [-l maxparallel] [-T fstype:fsoptions]\n\t\t[-t fstype]"; 557 558 (void)fprintf(stderr, "usage: %s %s [special|node]...\n", 559 getprogname(), common); 560 exit(1); 561 } 562