1 /* $NetBSD: fsck.c,v 1.52 2014/10/25 22:00:19 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 1.52 2014/10/25 22:00:19 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 #if defined(__minix)
188 /* parallel checking heuristic doesn't work for minix currently */
189 maxrun = 1;
190 #endif /* !defined(__minix) */
191 argc -= optind;
192 argv += optind;
193
194 if (argc == 0)
195 return checkfstab(flags, maxrun, isok, checkfs);
196
197 #define BADTYPE(type) \
198 (strcmp(type, FSTAB_RO) && \
199 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ))
200
201
202 for (; argc--; argv++) {
203 const char *spec, *spec2, *mntpt, *type, *cp;
204 char device[MAXPATHLEN];
205
206 spec = mntpt = *argv;
207 spec2 = getfsspecname(buf, sizeof(buf), spec);
208 if (spec2 == NULL)
209 spec2 = spec;
210
211 cp = strrchr(spec2, '/');
212 if (cp == 0) {
213 (void)snprintf(device, sizeof(device), "%s%s",
214 _PATH_DEV, spec2);
215 spec2 = device;
216 }
217
218 fs = getfsfile(spec);
219 if (fs == NULL)
220 fs = getfsspec(spec);
221 if (fs == NULL && spec != spec2) {
222 fs = getfsspec(spec2);
223 spec = spec2;
224 }
225
226 if (fs) {
227 spec = getfsspecname(buf, sizeof(buf), fs->fs_spec);
228 if (spec == NULL)
229 err(FSCK_EXIT_CHECK_FAILED, "%s", buf);
230 type = fs->fs_vfstype;
231 if (BADTYPE(fs->fs_type))
232 errx(FSCK_EXIT_CHECK_FAILED,
233 "%s has unknown file system type.",
234 spec);
235 } else {
236 if (vfstype == NULL)
237 vfstype = getfslab(spec);
238 type = vfstype;
239 }
240
241 rval = checkfs(type, blockcheck(spec), *argv, NULL, NULL);
242 if (rval > ret)
243 ret = rval;
244 }
245
246 return ret;
247 }
248
249
250 static void *
isok(struct fstab * fs)251 isok(struct fstab *fs)
252 {
253
254 if (fs->fs_passno == 0)
255 return NULL;
256
257 if (BADTYPE(fs->fs_type))
258 return NULL;
259
260 if (!selected(fs->fs_vfstype))
261 return NULL;
262
263 if (omitted(fs->fs_file))
264 return NULL;
265
266 return fs;
267 }
268
269
270 static int
checkfs(const char * vfst,const char * spec,const char * mntpt,void * auxarg,pid_t * pidp)271 checkfs(const char *vfst, const char *spec, const char *mntpt, void *auxarg,
272 pid_t *pidp)
273 {
274 /* List of directories containing fsck_xxx subcommands. */
275 static const char *edirs[] = {
276 #ifdef RESCUEDIR
277 RESCUEDIR,
278 #endif
279 _PATH_SBIN,
280 _PATH_USRSBIN,
281 #if defined(__minix)
282 "/usr/pkg/sbin/",
283 #endif /* defined(__minix) */
284 NULL
285 };
286 const char ** volatile argv, **edir;
287 const char * volatile vfstype = vfst;
288 pid_t pid;
289 int argc, i, status, maxargc;
290 char *optb;
291 char *volatile optbuf;
292 char execname[MAXPATHLEN + 1], execbase[MAXPATHLEN];
293 const char *extra = getoptions(vfstype);
294
295 if (!strcmp(vfstype, "ufs"))
296 vfstype = MOUNT_UFS;
297
298 optb = NULL;
299 if (options)
300 catopt(&optb, options);
301 if (extra)
302 catopt(&optb, extra);
303 optbuf = optb;
304
305 maxargc = 64;
306 argv = emalloc(sizeof(char *) * maxargc);
307
308 (void) snprintf(execbase, sizeof(execbase), "fsck_%s", vfstype);
309 argc = 0;
310 argv[argc++] = execbase;
311 if (optbuf)
312 mangle(optbuf, &argc, &argv, &maxargc);
313 argv[argc++] = spec;
314 argv[argc] = NULL;
315
316 if (flags & (CHECK_DEBUG|CHECK_VERBOSE)) {
317 (void)printf("start %s %swait", mntpt,
318 pidp ? "no" : "");
319 for (i = 0; i < argc; i++)
320 (void)printf(" %s", argv[i]);
321 (void)printf("\n");
322 }
323
324 switch (pid = vfork()) {
325 case -1: /* Error. */
326 warn("vfork");
327 if (optbuf)
328 free(optbuf);
329 free(argv);
330 return FSCK_EXIT_CHECK_FAILED;
331
332 case 0: /* Child. */
333 if ((flags & CHECK_FORCE) == 0) {
334 struct statvfs sfs;
335
336 /*
337 * if mntpt is a mountpoint of a mounted file
338 * system and it's mounted read-write, skip it
339 * unless -f is given.
340 */
341 if ((statvfs(mntpt, &sfs) == 0) &&
342 (strcmp(mntpt, sfs.f_mntonname) == 0) &&
343 ((sfs.f_flag & MNT_RDONLY) == 0)) {
344 printf(
345 "%s: file system is mounted read-write on %s; not checking\n",
346 spec, mntpt);
347 if ((flags & CHECK_PREEN) && auxarg != NULL)
348 _exit(FSCK_EXIT_OK); /* fsck -p */
349 else
350 _exit(FSCK_EXIT_CHECK_FAILED); /* fsck [[-p] ...] */
351 }
352 }
353
354 if (flags & CHECK_DEBUG)
355 _exit(FSCK_EXIT_OK);
356
357 /* Go find an executable. */
358 edir = edirs;
359 do {
360 (void)snprintf(execname,
361 sizeof(execname), "%s/%s", *edir, execbase);
362 execv(execname, (char * const *)__UNCONST(argv));
363 if (errno != ENOENT) {
364 if (spec)
365 warn("exec %s for %s", execname, spec);
366 else
367 warn("exec %s", execname);
368 }
369 } while (*++edir != NULL);
370
371 if (errno == ENOENT) {
372 if (spec)
373 warn("exec %s for %s", execname, spec);
374 else
375 warn("exec %s", execname);
376 }
377 _exit(FSCK_EXIT_CHECK_FAILED);
378 /* NOTREACHED */
379
380 default: /* Parent. */
381 if (optbuf)
382 free(optbuf);
383 free(argv);
384
385 if (pidp) {
386 *pidp = pid;
387 return FSCK_EXIT_OK;
388 }
389
390 if (waitpid(pid, &status, 0) < 0) {
391 warn("waitpid");
392 return FSCK_EXIT_CHECK_FAILED;
393 }
394
395 if (WIFEXITED(status)) {
396 if (WEXITSTATUS(status) != 0)
397 return WEXITSTATUS(status);
398 }
399 else if (WIFSIGNALED(status)) {
400 warnx("%s: %s", spec, strsignal(WTERMSIG(status)));
401 return FSCK_EXIT_CHECK_FAILED;
402 }
403 break;
404 }
405
406 return FSCK_EXIT_OK;
407 }
408
409
410 static int
selected(const char * type)411 selected(const char *type)
412 {
413 struct entry *e;
414
415 /* If no type specified, it's always selected. */
416 TAILQ_FOREACH(e, &selhead, entries)
417 if (!strcmp(e->type, type))
418 return which == IN_LIST ? 1 : 0;
419
420 return which == IN_LIST ? 0 : 1;
421 }
422
423
424 static int
omitted(const char * mountedon)425 omitted(const char *mountedon)
426 {
427 struct entry *e;
428
429 /* If no type specified, it's always selected. */
430 TAILQ_FOREACH(e, &omhead, entries)
431 if (!strcmp(e->type, mountedon))
432 return 1;
433
434 return 0;
435 }
436
437
438 static const char *
getoptions(const char * type)439 getoptions(const char *type)
440 {
441 struct entry *e;
442
443 TAILQ_FOREACH(e, &opthead, entries)
444 if (!strcmp(e->type, type))
445 return e->options;
446 return "";
447 }
448
449
450 static void
addoption(char * optstr)451 addoption(char *optstr)
452 {
453 char *newoptions;
454 struct entry *e;
455
456 if ((newoptions = strchr(optstr, ':')) == NULL)
457 errx(1, "Invalid option string");
458
459 *newoptions++ = '\0';
460
461 TAILQ_FOREACH(e, &opthead, entries)
462 if (!strcmp(e->type, optstr)) {
463 catopt(&e->options, newoptions);
464 return;
465 }
466 addentry(&opthead, optstr, newoptions);
467 }
468
469
470 static void
addentry(struct fstypelist * list,const char * type,const char * opts)471 addentry(struct fstypelist *list, const char *type, const char *opts)
472 {
473 struct entry *e;
474
475 e = emalloc(sizeof(struct entry));
476 e->type = estrdup(type);
477 e->options = estrdup(opts);
478 TAILQ_INSERT_TAIL(list, e, entries);
479 }
480
481
482 static void
maketypelist(char * fslist)483 maketypelist(char *fslist)
484 {
485 char *ptr;
486
487 if ((fslist == NULL) || (fslist[0] == '\0'))
488 errx(1, "empty type list");
489
490 if (fslist[0] == 'n' && fslist[1] == 'o') {
491 fslist += 2;
492 which = NOT_IN_LIST;
493 }
494 else
495 which = IN_LIST;
496
497 while ((ptr = strsep(&fslist, ",")) != NULL)
498 addentry(&selhead, ptr, "");
499
500 }
501
502
503 static void
catopt(char ** sp,const char * o)504 catopt(char **sp, const char *o)
505 {
506 char *s;
507 size_t i, j;
508
509 s = *sp;
510 if (s) {
511 i = strlen(s);
512 j = i + 1 + strlen(o) + 1;
513 s = erealloc(s, j);
514 (void)snprintf(s + i, j, ",%s", o);
515 } else
516 s = estrdup(o);
517 *sp = s;
518 }
519
520
521 static void
mangle(char * opts,int * argcp,const char ** volatile * argvp,int * maxargcp)522 mangle(char *opts, int *argcp, const char ** volatile *argvp, int *maxargcp)
523 {
524 char *p, *s;
525 int argc, maxargc;
526 const char **argv;
527
528 argc = *argcp;
529 argv = *argvp;
530 maxargc = *maxargcp;
531
532 for (s = opts; (p = strsep(&s, ",")) != NULL;) {
533 /* Always leave space for one more argument and the NULL. */
534 if (argc >= maxargc - 3) {
535 maxargc <<= 1;
536 argv = erealloc(argv, maxargc * sizeof(char *));
537 }
538 if (*p != '\0') {
539 if (*p == '-') {
540 argv[argc++] = p;
541 p = strchr(p, '=');
542 if (p) {
543 *p = '\0';
544 argv[argc++] = p+1;
545 }
546 } else {
547 argv[argc++] = "-o";
548 argv[argc++] = p;
549 }
550 }
551 }
552
553 *argcp = argc;
554 *argvp = argv;
555 *maxargcp = maxargc;
556 }
557
558 static const char *
getfslab(const char * str)559 getfslab(const char *str)
560 {
561 #if defined(__minix)
562 errx(1, "cannot determine vfstype under minix");
563 #else
564 static struct dkwedge_info dkw;
565 struct disklabel dl;
566 int fd;
567 char p;
568 const char *vfstype;
569 u_char t;
570
571 /* deduce the file system type from the disk label */
572 if ((fd = open(str, O_RDONLY)) == -1)
573 err(1, "cannot open `%s'", str);
574
575 /* First check to see if it's a wedge. */
576 if (ioctl(fd, DIOCGWEDGEINFO, &dkw) == 0) {
577 /* Yup, this is easy. */
578 (void) close(fd);
579 return (dkw.dkw_ptype);
580 }
581
582 if (ioctl(fd, DIOCGDINFO, &dl) == -1)
583 err(1, "cannot get disklabel for `%s'", str);
584
585 (void) close(fd);
586
587 p = str[strlen(str) - 1];
588
589 if ((p - 'a') >= dl.d_npartitions)
590 errx(1, "partition `%s' is not defined on disk", str);
591
592 if ((t = dl.d_partitions[p - 'a'].p_fstype) >= FSMAXTYPES)
593 errx(1, "partition `%s' is not of a legal vfstype",
594 str);
595
596 if ((vfstype = fscknames[t]) == NULL)
597 errx(1, "vfstype `%s' on partition `%s' is not supported",
598 fstypenames[t], str);
599
600 return vfstype;
601 #endif /* defined(__minix) */
602 }
603
604
605 static void
usage(void)606 usage(void)
607 {
608 static const char common[] =
609 "[-dfnPpqvy] [-x excludemount] [-l maxparallel] [-T fstype:fsoptions]\n\t\t[-t fstype]";
610
611 (void)fprintf(stderr, "usage: %s %s [special|node]...\n",
612 getprogname(), common);
613 exit(FSCK_EXIT_USAGE);
614 }
615