1/* $NetBSD: fsck.c,v 1.30 2003/08/07 10:04:15 agc 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 * $NetBSD: fsck.c,v 1.30 2003/08/07 10:04:15 agc Exp $
35 */
36
37#include <sys/cdefs.h>
|
38__FBSDID("$FreeBSD: head/sbin/fsck/fsck.c 241806 2012-10-21 12:01:11Z uqs $");
|
| 38__FBSDID("$FreeBSD: head/sbin/fsck/fsck.c 241807 2012-10-21 12:01:19Z uqs $"); |
39
40#include <sys/param.h>
41#include <sys/mount.h>
42#include <sys/queue.h>
43#include <sys/wait.h>
44#define FSTYPENAMES
45#include <sys/disklabel.h>
46#include <sys/ioctl.h>
47
48#include <ctype.h>
49#include <err.h>
50#include <errno.h>
51#include <fstab.h>
52#include <fcntl.h>
53#include <paths.h>
54#include <signal.h>
55#include <stdio.h>
56#include <stdlib.h>
57#include <string.h>
58#include <unistd.h>
59
60#include "fsutil.h"
61
62static enum { IN_LIST, NOT_IN_LIST } which = NOT_IN_LIST;
63
64static TAILQ_HEAD(fstypelist, entry) opthead, selhead;
65
66struct entry {
67 char *type;
68 char *options;
69 TAILQ_ENTRY(entry) entries;
70};
71
72static char *options = NULL;
73static int flags = 0;
74static int forceflag = 0;
75
|
76static int checkfs(const char *, const char *, const char *, char *, pid_t *);
|
| 76static int checkfs(const char *, const char *, const char *, const char *, pid_t *); |
77static int selected(const char *);
78static void addoption(char *);
79static const char *getoptions(const char *);
80static void addentry(struct fstypelist *, const char *, const char *);
81static void maketypelist(char *);
82static void catopt(char **, const char *);
|
83static void mangle(char *, int *, const char ***, int *);
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| 83static void mangle(char *, int *, const char ** volatile *, int *); |
84static const char *getfslab(const char *);
85static void usage(void) __dead2;
86static int isok(struct fstab *);
87
88int
89main(int argc, char *argv[])
90{
91 struct fstab *fs;
92 int i, rval = 0;
93 const char *vfstype = NULL;
94 char globopt[3];
95 const char *etc_fstab;
96
97 globopt[0] = '-';
98 globopt[2] = '\0';
99
100 TAILQ_INIT(&selhead);
101 TAILQ_INIT(&opthead);
102
103 etc_fstab = NULL;
104 while ((i = getopt(argc, argv, "BCdvpfFnyl:t:T:c:")) != -1)
105 switch (i) {
106 case 'B':
107 if (flags & CHECK_BACKGRD)
108 errx(1, "Cannot specify -B and -F.");
109 flags |= DO_BACKGRD;
110 break;
111
112 case 'd':
113 flags |= CHECK_DEBUG;
114 break;
115
116 case 'v':
117 flags |= CHECK_VERBOSE;
118 break;
119
120 case 'F':
121 if (flags & DO_BACKGRD)
122 errx(1, "Cannot specify -B and -F.");
123 flags |= CHECK_BACKGRD;
124 break;
125
126 case 'p':
127 flags |= CHECK_PREEN;
128 /*FALLTHROUGH*/
129 case 'C':
130 flags |= CHECK_CLEAN;
131 /*FALLTHROUGH*/
132 case 'n':
133 case 'y':
134 globopt[1] = i;
135 catopt(&options, globopt);
136 break;
137
138 case 'f':
139 forceflag = 1;
140 globopt[1] = i;
141 catopt(&options, globopt);
142 break;
143
144 case 'l':
145 warnx("Ignoring obsolete -l option\n");
146 break;
147
148 case 'T':
149 if (*optarg)
150 addoption(optarg);
151 break;
152
153 case 't':
154 if (!TAILQ_EMPTY(&selhead))
155 errx(1, "only one -t option may be specified.");
156
157 maketypelist(optarg);
158 vfstype = optarg;
159 break;
160
161 case 'c':
162 etc_fstab = optarg;
163 break;
164
165 case '?':
166 default:
167 usage();
168 /* NOTREACHED */
169 }
170
171 argc -= optind;
172 argv += optind;
173
174 if (etc_fstab != NULL)
175 setfstab(etc_fstab);
176
177 if (argc == 0)
178 return checkfstab(flags, isok, checkfs);
179
180#define BADTYPE(type) \
181 (strcmp(type, FSTAB_RO) && \
182 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ))
183
184
185 for (; argc--; argv++) {
186 const char *spec, *mntpt, *type, *cp;
187 char device[MAXPATHLEN];
188 struct statfs *mntp;
189
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| 190 mntpt = NULL; |
191 spec = *argv;
192 cp = strrchr(spec, '/');
193 if (cp == 0) {
194 (void)snprintf(device, sizeof(device), "%s%s",
195 _PATH_DEV, spec);
196 spec = device;
197 }
198 mntp = getmntpt(spec);
199 if (mntp != NULL) {
200 spec = mntp->f_mntfromname;
201 mntpt = mntp->f_mntonname;
202 }
203 if ((fs = getfsfile(spec)) == NULL &&
204 (fs = getfsspec(spec)) == NULL) {
205 if (vfstype == NULL)
206 vfstype = getfslab(spec);
207 if (vfstype == NULL)
208 errx(1, "Could not determine filesystem type");
209 type = vfstype;
210 devcheck(spec);
211 } else {
212 spec = fs->fs_spec;
213 type = fs->fs_vfstype;
214 mntpt = fs->fs_file;
215 if (BADTYPE(fs->fs_type))
216 errx(1, "%s has unknown file system type.",
217 spec);
218 }
219 if ((flags & CHECK_BACKGRD) &&
220 checkfs(type, spec, mntpt, "-F", NULL) == 0) {
221 printf("%s: DEFER FOR BACKGROUND CHECKING\n", *argv);
222 continue;
223 }
224 if ((flags & DO_BACKGRD) && forceflag == 0 &&
225 checkfs(type, spec, mntpt, "-F", NULL) != 0)
226 continue;
227
228 rval |= checkfs(type, spec, mntpt, NULL, NULL);
229 }
230
231 return rval;
232}
233
234
235static int
236isok(struct fstab *fs)
237{
238 int i;
239
240 if (fs->fs_passno == 0)
241 return (0);
242 if (BADTYPE(fs->fs_type))
243 return (0);
244 if (!selected(fs->fs_vfstype))
245 return (0);
246 /*
247 * If the -B flag has been given, then process the needed
248 * background checks. Background checks cannot be run on
249 * file systems that will be mounted read-only or that were
250 * not mounted at boot time (typically those marked `noauto').
251 * If these basic tests are passed, check with the file system
252 * itself to see if it is willing to do background checking
253 * by invoking its check program with the -F flag.
254 */
255 if (flags & DO_BACKGRD) {
256 if (!strcmp(fs->fs_type, FSTAB_RO))
257 return (0);
258 if (getmntpt(fs->fs_spec) == NULL)
259 return (0);
260 if (checkfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file, "-F", 0))
261 return (0);
262 return (1);
263 }
264 /*
265 * If the -F flag has been given, then consider deferring the
266 * check to background. Background checks cannot be run on
267 * file systems that will be mounted read-only or that will
268 * not be mounted at boot time (e.g., marked `noauto'). If
269 * these basic tests are passed, check with the file system
270 * itself to see if it is willing to defer to background
271 * checking by invoking its check program with the -F flag.
272 */
273 if ((flags & CHECK_BACKGRD) == 0 || !strcmp(fs->fs_type, FSTAB_RO))
274 return (1);
275 for (i = strlen(fs->fs_mntops) - 6; i >= 0; i--)
276 if (!strncmp(&fs->fs_mntops[i], "noauto", 6))
277 break;
278 if (i >= 0)
279 return (1);
280 if (checkfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file, "-F", NULL) != 0)
281 return (1);
282 printf("%s: DEFER FOR BACKGROUND CHECKING\n", fs->fs_spec);
283 return (0);
284}
285
286
287static int
288checkfs(const char *pvfstype, const char *spec, const char *mntpt,
|
288 char *auxopt, pid_t *pidp)
|
| 289 const char *auxopt, pid_t *pidp) |
290{
|
290 const char **argv;
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| 291 const char ** volatile argv; |
292 pid_t pid;
293 int argc, i, status, maxargc;
294 char *optbuf, execbase[MAXPATHLEN];
295 char *vfstype = NULL;
296 const char *extra = NULL;
297
298#ifdef __GNUC__
299 /* Avoid vfork clobbering */
300 (void) &optbuf;
301 (void) &vfstype;
302#endif
303 /*
304 * We convert the vfstype to lowercase and any spaces to underscores
305 * to not confuse the issue
306 *
307 * XXX This is a kludge to make automatic filesystem type guessing
308 * from the disklabel work for "4.2BSD" filesystems. It does a
309 * very limited subset of transliteration to a normalised form of
310 * filesystem name, and we do not seem to enforce a filesystem
311 * name character set.
312 */
313 vfstype = strdup(pvfstype);
314 if (vfstype == NULL)
315 perr("strdup(pvfstype)");
|
315 for (i = 0; i < strlen(vfstype); i++) {
|
| 316 for (i = 0; i < (int)strlen(vfstype); i++) { |
317 vfstype[i] = tolower(vfstype[i]);
318 if (vfstype[i] == ' ')
319 vfstype[i] = '_';
320 }
321
322 extra = getoptions(vfstype);
323 optbuf = NULL;
324 if (options)
325 catopt(&optbuf, options);
326 if (extra)
327 catopt(&optbuf, extra);
328 if (auxopt)
329 catopt(&optbuf, auxopt);
330 else if (flags & DO_BACKGRD)
331 catopt(&optbuf, "-B");
332
333 maxargc = 64;
334 argv = emalloc(sizeof(char *) * maxargc);
335
336 (void) snprintf(execbase, sizeof(execbase), "fsck_%s", vfstype);
337 argc = 0;
338 argv[argc++] = execbase;
339 if (optbuf)
340 mangle(optbuf, &argc, &argv, &maxargc);
341 argv[argc++] = spec;
342 argv[argc] = NULL;
343
344 if (flags & (CHECK_DEBUG|CHECK_VERBOSE)) {
345 (void)printf("start %s %swait", mntpt,
346 pidp ? "no" : "");
347 for (i = 0; i < argc; i++)
348 (void)printf(" %s", argv[i]);
349 (void)printf("\n");
350 }
351
352 switch (pid = vfork()) {
353 case -1: /* Error. */
354 warn("vfork");
355 if (optbuf)
356 free(optbuf);
357 free(vfstype);
358 return (1);
359
360 case 0: /* Child. */
361 if ((flags & CHECK_DEBUG) && auxopt == NULL)
362 _exit(0);
363
364 /* Go find an executable. */
|
364 execvP(execbase, _PATH_SYSPATH, (char * const *)argv);
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| 365 execvP(execbase, _PATH_SYSPATH, __DECONST(char * const *, argv)); |
366 if (spec)
367 warn("exec %s for %s in %s", execbase, spec, _PATH_SYSPATH);
368 else
369 warn("exec %s in %s", execbase, _PATH_SYSPATH);
370 _exit(1);
371 /* NOTREACHED */
372
373 default: /* Parent. */
374 if (optbuf)
375 free(optbuf);
376
377 free(vfstype);
378
379 if (pidp) {
380 *pidp = pid;
381 return 0;
382 }
383
384 if (waitpid(pid, &status, 0) < 0) {
385 warn("waitpid");
386 return (1);
387 }
388
389 if (WIFEXITED(status)) {
390 if (WEXITSTATUS(status) != 0)
391 return (WEXITSTATUS(status));
392 }
393 else if (WIFSIGNALED(status)) {
394 warnx("%s: %s", spec, strsignal(WTERMSIG(status)));
395 return (1);
396 }
397 break;
398 }
399
400 return (0);
401}
402
403
404static int
405selected(const char *type)
406{
407 struct entry *e;
408
409 /* If no type specified, it's always selected. */
410 TAILQ_FOREACH(e, &selhead, entries)
411 if (!strncmp(e->type, type, MFSNAMELEN))
412 return which == IN_LIST ? 1 : 0;
413
414 return which == IN_LIST ? 0 : 1;
415}
416
417
418static const char *
419getoptions(const char *type)
420{
421 struct entry *e;
422
423 TAILQ_FOREACH(e, &opthead, entries)
424 if (!strncmp(e->type, type, MFSNAMELEN))
425 return e->options;
426 return "";
427}
428
429
430static void
431addoption(char *optstr)
432{
433 char *newoptions;
434 struct entry *e;
435
436 if ((newoptions = strchr(optstr, ':')) == NULL)
437 errx(1, "Invalid option string");
438
439 *newoptions++ = '\0';
440
441 TAILQ_FOREACH(e, &opthead, entries)
442 if (!strncmp(e->type, optstr, MFSNAMELEN)) {
443 catopt(&e->options, newoptions);
444 return;
445 }
446 addentry(&opthead, optstr, newoptions);
447}
448
449
450static void
451addentry(struct fstypelist *list, const char *type, const char *opts)
452{
453 struct entry *e;
454
455 e = emalloc(sizeof(struct entry));
456 e->type = estrdup(type);
457 e->options = estrdup(opts);
458 TAILQ_INSERT_TAIL(list, e, entries);
459}
460
461
462static void
463maketypelist(char *fslist)
464{
465 char *ptr;
466
467 if ((fslist == NULL) || (fslist[0] == '\0'))
468 errx(1, "empty type list");
469
470 if (fslist[0] == 'n' && fslist[1] == 'o') {
471 fslist += 2;
472 which = NOT_IN_LIST;
473 }
474 else
475 which = IN_LIST;
476
477 while ((ptr = strsep(&fslist, ",")) != NULL)
478 addentry(&selhead, ptr, "");
479
480}
481
482
483static void
484catopt(char **sp, const char *o)
485{
486 char *s;
487 size_t i, j;
488
489 s = *sp;
490 if (s) {
491 i = strlen(s);
492 j = i + 1 + strlen(o) + 1;
493 s = erealloc(s, j);
494 (void)snprintf(s + i, j, ",%s", o);
495 } else
496 s = estrdup(o);
497 *sp = s;
498}
499
500
501static void
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501mangle(char *opts, int *argcp, const char ***argvp, int *maxargcp)
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| 502mangle(char *opts, int *argcp, const char ** volatile *argvp, int *maxargcp) |
503{
504 char *p, *s;
505 int argc, maxargc;
506 const char **argv;
507
508 argc = *argcp;
509 argv = *argvp;
510 maxargc = *maxargcp;
511
512 for (s = opts; (p = strsep(&s, ",")) != NULL;) {
513 /* Always leave space for one more argument and the NULL. */
514 if (argc >= maxargc - 3) {
515 maxargc <<= 1;
516 argv = erealloc(argv, maxargc * sizeof(char *));
517 }
518 if (*p != '\0') {
519 if (*p == '-') {
520 argv[argc++] = p;
521 p = strchr(p, '=');
522 if (p) {
523 *p = '\0';
524 argv[argc++] = p+1;
525 }
526 } else {
527 argv[argc++] = "-o";
528 argv[argc++] = p;
529 }
530 }
531 }
532
533 *argcp = argc;
534 *argvp = argv;
535 *maxargcp = maxargc;
536}
537
538
|
538const static char *
|
| 539static const char * |
540getfslab(const char *str)
541{
542 struct disklabel dl;
543 int fd;
544 char p;
545 const char *vfstype;
546 u_char t;
547
548 /* deduce the file system type from the disk label */
549 if ((fd = open(str, O_RDONLY)) == -1)
550 err(1, "cannot open `%s'", str);
551
552 if (ioctl(fd, DIOCGDINFO, &dl) == -1) {
553 (void) close(fd);
554 return(NULL);
555 }
556
557 (void) close(fd);
558
559 p = str[strlen(str) - 1];
560
561 if ((p - 'a') >= dl.d_npartitions)
562 errx(1, "partition `%s' is not defined on disk", str);
563
564 if ((t = dl.d_partitions[p - 'a'].p_fstype) >= FSMAXTYPES)
565 errx(1, "partition `%s' is not of a legal vfstype",
566 str);
567
568 if ((vfstype = fstypenames[t]) == NULL)
569 errx(1, "vfstype `%s' on partition `%s' is not supported",
570 fstypenames[t], str);
571
572 return vfstype;
573}
574
575
576static void
577usage(void)
578{
579 static const char common[] =
580 "[-Cdfnpvy] [-B | -F] [-T fstype:fsoptions] [-t fstype] [-c fstab]";
581
582 (void)fprintf(stderr, "usage: %s %s [special | node] ...\n",
583 getprogname(), common);
584 exit(1);
585}
|