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