1 /* $NetBSD: fsck.c,v 1.53 2023/01/24 08:09:37 mlelstv 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 1.53 2023/01/24 08:09:37 mlelstv 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 #include "exitvalues.h"
67
68 static enum { IN_LIST, NOT_IN_LIST } which = NOT_IN_LIST;
69
TAILQ_HEAD(fstypelist,entry)70 TAILQ_HEAD(fstypelist, entry) opthead, selhead, omhead;
71
72 struct entry {
73 char *type;
74 char *options;
75 TAILQ_ENTRY(entry) entries;
76 };
77
78 static int maxrun = 0;
79 static char *options = NULL;
80 static int flags = 0;
81
82 static int checkfs(const char *, const char *, const char *, void *, pid_t *);
83 static int selected(const char *);
84 static int omitted(const char *);
85 static void addoption(char *);
86 static const char *getoptions(const char *);
87 static void addentry(struct fstypelist *, const char *, const char *);
88 static void maketypelist(char *);
89 static void catopt(char **, const char *);
90 static void mangle(char *, int *, const char ** volatile *, int *);
91 static const char *getfslab(const char *);
92 __dead static void usage(void);
93 static void *isok(struct fstab *);
94
95 int
main(int argc,char * argv[])96 main(int argc, char *argv[])
97 {
98 struct fstab *fs;
99 int i, rval;
100 const char *vfstype = NULL;
101 char globopt[3];
102 int ret = FSCK_EXIT_OK;
103 char buf[MAXPATHLEN];
104
105 globopt[0] = '-';
106 globopt[2] = '\0';
107
108 TAILQ_INIT(&selhead);
109 TAILQ_INIT(&opthead);
110 TAILQ_INIT(&omhead);
111
112 while ((i = getopt(argc, argv, "dfl:nPpqT:t:vx:y")) != -1) {
113 switch (i) {
114 case 'd':
115 flags |= CHECK_DEBUG;
116 continue;
117
118 case 'f':
119 flags |= CHECK_FORCE;
120 break;
121
122 case 'n':
123 flags |= CHECK_NOFIX;
124 break;
125
126 case 'p':
127 flags |= CHECK_PREEN;
128 break;
129
130 case 'P':
131 flags |= CHECK_PROGRESS;
132 break;
133
134 case 'q':
135 break;
136
137 case 'l':
138 maxrun = atoi(optarg);
139 continue;
140
141 case 'T':
142 if (*optarg)
143 addoption(optarg);
144 continue;
145
146 case 't':
147 if (TAILQ_FIRST(&selhead) != NULL)
148 errx(1, "only one -t option may be specified.");
149
150 maketypelist(optarg);
151 vfstype = optarg;
152 continue;
153
154 case 'v':
155 flags |= CHECK_VERBOSE;
156 continue;
157
158 case 'x':
159 addentry(&omhead, optarg, "");
160 continue;
161
162 case 'y':
163 break;
164
165 case '?':
166 default:
167 usage();
168 /* NOTREACHED */
169 }
170
171 /* Pass option to fsck_xxxfs */
172 globopt[1] = i;
173 catopt(&options, globopt);
174 }
175
176 /* Don't do progress meters if we're debugging. */
177 if (flags & CHECK_DEBUG)
178 flags &= ~CHECK_PROGRESS;
179
180 /*
181 * If progress meters are being used, force max parallel to 1
182 * so the progress meter outputs don't interfere with one another.
183 */
184 if (flags & CHECK_PROGRESS)
185 maxrun = 1;
186
187 argc -= optind;
188 argv += optind;
189
190 if (argc == 0)
191 return checkfstab(flags, maxrun, isok, checkfs);
192
193 #define BADTYPE(type) \
194 (strcmp(type, FSTAB_RO) && \
195 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ))
196
197
198 for (; argc--; argv++) {
199 const char *spec, *spec2, *mntpt, *type, *cp;
200 char device[MAXPATHLEN];
201
202 spec = mntpt = *argv;
203 spec2 = getfsspecname(buf, sizeof(buf), spec);
204 if (spec2 == NULL)
205 spec2 = spec;
206
207 cp = strrchr(spec2, '/');
208 if (cp == 0) {
209 (void)snprintf(device, sizeof(device), "%s%s",
210 _PATH_DEV, spec2);
211 spec2 = device;
212 }
213
214 fs = getfsfile(spec);
215 if (fs == NULL)
216 fs = getfsspec(spec);
217 if (fs == NULL && spec != spec2) {
218 fs = getfsspec(spec2);
219 spec = spec2;
220 }
221
222 if (fs) {
223 spec = getfsspecname(buf, sizeof(buf), fs->fs_spec);
224 if (spec == NULL)
225 err(FSCK_EXIT_CHECK_FAILED, "%s", buf);
226 type = fs->fs_vfstype;
227 if (BADTYPE(fs->fs_type))
228 errx(FSCK_EXIT_CHECK_FAILED,
229 "%s has unknown file system type.",
230 spec);
231 } else {
232 if (vfstype == NULL)
233 vfstype = getfslab(spec);
234 type = vfstype;
235 }
236
237 rval = checkfs(type, blockcheck(spec), *argv, NULL, NULL);
238 if (rval > ret)
239 ret = rval;
240 }
241
242 return ret;
243 }
244
245
246 static void *
isok(struct fstab * fs)247 isok(struct fstab *fs)
248 {
249
250 if (fs->fs_passno == 0)
251 return NULL;
252
253 if (BADTYPE(fs->fs_type))
254 return NULL;
255
256 if (!selected(fs->fs_vfstype))
257 return NULL;
258
259 if (omitted(fs->fs_file))
260 return NULL;
261
262 return fs;
263 }
264
265
266 static int
checkfs(const char * vfst,const char * spec,const char * mntpt,void * auxarg,pid_t * pidp)267 checkfs(const char *vfst, const char *spec, const char *mntpt, void *auxarg,
268 pid_t *pidp)
269 {
270 /* List of directories containing fsck_xxx subcommands. */
271 static const char *edirs[] = {
272 #ifdef RESCUEDIR
273 RESCUEDIR,
274 #endif
275 _PATH_SBIN,
276 _PATH_USRSBIN,
277 NULL
278 };
279 const char ** volatile argv, **edir;
280 const char * volatile vfstype = vfst;
281 pid_t pid;
282 int argc, i, status, maxargc;
283 char *optb;
284 char *volatile optbuf;
285 char execname[MAXPATHLEN + 1], execbase[MAXPATHLEN];
286 const char *extra = getoptions(vfstype);
287
288 if (!strcmp(vfstype, "ufs"))
289 vfstype = MOUNT_UFS;
290
291 optb = NULL;
292 if (options)
293 catopt(&optb, options);
294 if (extra)
295 catopt(&optb, extra);
296 optbuf = optb;
297
298 maxargc = 64;
299 argv = emalloc(sizeof(char *) * maxargc);
300
301 (void) snprintf(execbase, sizeof(execbase), "fsck_%s", vfstype);
302 argc = 0;
303 argv[argc++] = execbase;
304 if (optbuf)
305 mangle(optbuf, &argc, &argv, &maxargc);
306 argv[argc++] = spec;
307 argv[argc] = NULL;
308
309 if (flags & (CHECK_DEBUG|CHECK_VERBOSE)) {
310 (void)printf("start %s %swait", mntpt,
311 pidp ? "no" : "");
312 for (i = 0; i < argc; i++)
313 (void)printf(" %s", argv[i]);
314 (void)printf("\n");
315 }
316
317 switch (pid = vfork()) {
318 case -1: /* Error. */
319 warn("vfork");
320 if (optbuf)
321 free(optbuf);
322 free(argv);
323 return FSCK_EXIT_CHECK_FAILED;
324
325 case 0: /* Child. */
326 if ((flags & CHECK_FORCE) == 0) {
327 struct statvfs sfs;
328
329 /*
330 * if mntpt is a mountpoint of a mounted file
331 * system and it's mounted read-write, skip it
332 * unless -f is given.
333 */
334 if ((statvfs(mntpt, &sfs) == 0) &&
335 (strcmp(mntpt, sfs.f_mntonname) == 0) &&
336 ((sfs.f_flag & MNT_RDONLY) == 0)) {
337 printf(
338 "%s: file system is mounted read-write on %s; not checking\n",
339 spec, mntpt);
340 if ((flags & CHECK_PREEN) && auxarg != NULL)
341 _exit(FSCK_EXIT_OK); /* fsck -p */
342 else
343 _exit(FSCK_EXIT_CHECK_FAILED); /* fsck [[-p] ...] */
344 }
345 }
346
347 if (flags & CHECK_DEBUG)
348 _exit(FSCK_EXIT_OK);
349
350 /* Go find an executable. */
351 edir = edirs;
352 do {
353 (void)snprintf(execname,
354 sizeof(execname), "%s/%s", *edir, execbase);
355 execv(execname, (char * const *)__UNCONST(argv));
356 if (errno != ENOENT) {
357 if (spec)
358 warn("exec %s for %s", execname, spec);
359 else
360 warn("exec %s", execname);
361 }
362 } while (*++edir != NULL);
363
364 if (errno == ENOENT) {
365 if (spec)
366 warn("exec %s for %s", execname, spec);
367 else
368 warn("exec %s", execname);
369 }
370 _exit(FSCK_EXIT_CHECK_FAILED);
371 /* NOTREACHED */
372
373 default: /* Parent. */
374 if (optbuf)
375 free(optbuf);
376 free(argv);
377
378 if (pidp) {
379 *pidp = pid;
380 return FSCK_EXIT_OK;
381 }
382
383 if (waitpid(pid, &status, 0) < 0) {
384 warn("waitpid");
385 return FSCK_EXIT_CHECK_FAILED;
386 }
387
388 if (WIFEXITED(status)) {
389 if (WEXITSTATUS(status) != 0)
390 return WEXITSTATUS(status);
391 }
392 else if (WIFSIGNALED(status)) {
393 warnx("%s: %s", spec, strsignal(WTERMSIG(status)));
394 return FSCK_EXIT_CHECK_FAILED;
395 }
396 break;
397 }
398
399 return FSCK_EXIT_OK;
400 }
401
402
403 static int
selected(const char * type)404 selected(const char *type)
405 {
406 struct entry *e;
407
408 /* If no type specified, it's always selected. */
409 TAILQ_FOREACH(e, &selhead, entries)
410 if (!strcmp(e->type, type))
411 return which == IN_LIST ? 1 : 0;
412
413 return which == IN_LIST ? 0 : 1;
414 }
415
416
417 static int
omitted(const char * mountedon)418 omitted(const char *mountedon)
419 {
420 struct entry *e;
421
422 /* If no type specified, it's always selected. */
423 TAILQ_FOREACH(e, &omhead, entries)
424 if (!strcmp(e->type, mountedon))
425 return 1;
426
427 return 0;
428 }
429
430
431 static const char *
getoptions(const char * type)432 getoptions(const char *type)
433 {
434 struct entry *e;
435
436 TAILQ_FOREACH(e, &opthead, entries)
437 if (!strcmp(e->type, type))
438 return e->options;
439 return "";
440 }
441
442
443 static void
addoption(char * optstr)444 addoption(char *optstr)
445 {
446 char *newoptions;
447 struct entry *e;
448
449 if ((newoptions = strchr(optstr, ':')) == NULL)
450 errx(1, "Invalid option string");
451
452 *newoptions++ = '\0';
453
454 TAILQ_FOREACH(e, &opthead, entries)
455 if (!strcmp(e->type, optstr)) {
456 catopt(&e->options, newoptions);
457 return;
458 }
459 addentry(&opthead, optstr, newoptions);
460 }
461
462
463 static void
addentry(struct fstypelist * list,const char * type,const char * opts)464 addentry(struct fstypelist *list, const char *type, const char *opts)
465 {
466 struct entry *e;
467
468 e = emalloc(sizeof(struct entry));
469 e->type = estrdup(type);
470 e->options = estrdup(opts);
471 TAILQ_INSERT_TAIL(list, e, entries);
472 }
473
474
475 static void
maketypelist(char * fslist)476 maketypelist(char *fslist)
477 {
478 char *ptr;
479
480 if ((fslist == NULL) || (fslist[0] == '\0'))
481 errx(1, "empty type list");
482
483 if (fslist[0] == 'n' && fslist[1] == 'o') {
484 fslist += 2;
485 which = NOT_IN_LIST;
486 }
487 else
488 which = IN_LIST;
489
490 while ((ptr = strsep(&fslist, ",")) != NULL)
491 addentry(&selhead, ptr, "");
492
493 }
494
495
496 static void
catopt(char ** sp,const char * o)497 catopt(char **sp, const char *o)
498 {
499 char *s;
500 size_t i, j;
501
502 s = *sp;
503 if (s) {
504 i = strlen(s);
505 j = i + 1 + strlen(o) + 1;
506 s = erealloc(s, j);
507 (void)snprintf(s + i, j, ",%s", o);
508 } else
509 s = estrdup(o);
510 *sp = s;
511 }
512
513
514 static void
mangle(char * opts,int * argcp,const char ** volatile * argvp,int * maxargcp)515 mangle(char *opts, int *argcp, const char ** volatile *argvp, int *maxargcp)
516 {
517 char *p, *s;
518 int argc, maxargc;
519 const char **argv;
520
521 argc = *argcp;
522 argv = *argvp;
523 maxargc = *maxargcp;
524
525 for (s = opts; (p = strsep(&s, ",")) != NULL;) {
526 /* Always leave space for one more argument and the NULL. */
527 if (argc >= maxargc - 3) {
528 maxargc <<= 1;
529 argv = erealloc(argv, maxargc * sizeof(char *));
530 }
531 if (*p != '\0') {
532 if (*p == '-') {
533 argv[argc++] = p;
534 p = strchr(p, '=');
535 if (p) {
536 *p = '\0';
537 argv[argc++] = p+1;
538 }
539 } else {
540 argv[argc++] = "-o";
541 argv[argc++] = p;
542 }
543 }
544 }
545
546 *argcp = argc;
547 *argvp = argv;
548 *maxargcp = maxargc;
549 }
550
551 static const char *
getfslab(const char * str)552 getfslab(const char *str)
553 {
554 static struct dkwedge_info dkw;
555 struct disklabel dl;
556 int fd;
557 char p;
558 const char *vfstype;
559 u_char t;
560 char buf[MAXPATHLEN];
561
562 /* deduce the file system type from the disk label */
563 if ((fd = opendisk(str, O_RDONLY, buf, sizeof(buf), 0)) == -1)
564 err(1, "cannot open `%s'", buf);
565
566 /* First check to see if it's a wedge. */
567 if (ioctl(fd, DIOCGWEDGEINFO, &dkw) == 0) {
568 /* Yup, this is easy. */
569 (void) close(fd);
570 return (dkw.dkw_ptype);
571 }
572
573 if (ioctl(fd, DIOCGDINFO, &dl) == -1)
574 err(1, "cannot get disklabel for `%s'", buf);
575
576 (void) close(fd);
577
578 p = buf[strlen(buf) - 1];
579
580 if ((p - 'a') >= dl.d_npartitions)
581 errx(1, "partition `%s' is not defined on disk", buf);
582
583 if ((t = dl.d_partitions[p - 'a'].p_fstype) >= FSMAXTYPES)
584 errx(1, "partition `%s' is not of a legal vfstype",
585 buf);
586
587 if ((vfstype = fscknames[t]) == NULL)
588 errx(1, "vfstype `%s' on partition `%s' is not supported",
589 fstypenames[t], buf);
590
591 return vfstype;
592 }
593
594
595 static void
usage(void)596 usage(void)
597 {
598 static const char common[] =
599 "[-dfnPpqvy] [-x excludemount] [-l maxparallel] [-T fstype:fsoptions]\n\t\t[-t fstype]";
600
601 (void)fprintf(stderr, "usage: %s %s [special|node]...\n",
602 getprogname(), common);
603 exit(FSCK_EXIT_USAGE);
604 }
605