summaryrefslogtreecommitdiff
path: root/sbin/fsck/fsck.c
blob: 5d1a150975be050612043f4c30d9bc102ab2c982 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
/*	$OpenBSD: fsck.c,v 1.1 1996/10/20 08:36:24 tholo Exp $	*/
/*	$NetBSD: fsck.c,v 1.7 1996/10/03 20:06:30 christos Exp $	*/

/*
 * Copyright (c) 1996 Christos Zoulas. All rights reserved.
 * Copyright (c) 1980, 1989, 1993, 1994
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * From: @(#)mount.c	8.19 (Berkeley) 4/19/94
 * From: NetBSD: mount.c,v 1.24 1995/11/18 03:34:29 cgd Exp 
 *
 */

static char rcsid[] = "$NetBSD: fsck.c,v 1.7 1996/10/03 20:06:30 christos Exp $";

#include <sys/param.h>
#include <sys/mount.h>
#include <sys/queue.h>
#include <sys/wait.h>

#include <err.h>
#include <errno.h>
#include <fstab.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "pathnames.h"
#include "fsutil.h"

static enum { IN_LIST, NOT_IN_LIST } which = NOT_IN_LIST;

TAILQ_HEAD(fstypelist, entry) opthead, selhead;

struct entry {
	char *type;
	char *options;
	TAILQ_ENTRY(entry) entries;
};

static int maxrun = 0;
static char *options = NULL;
static int flags = 0;

int main __P((int, char *[]));

static int checkfs __P((const char *, const char *, const char *, void *,
    pid_t *));
static int selected __P((const char *));
static void addoption __P((char *));
static const char *getoptions __P((const char *));
static void addentry __P((struct fstypelist *, const char *, const char *));
static void maketypelist __P((char *));
static char *catopt __P((char *, const char *, int));
static void mangle __P((char *, int *, const char ***, int *));
static void usage __P((void));
static void *isok __P((struct fstab *));


int
main(argc, argv)
	int argc;
	char *argv[];
{
	struct fstab *fs;
	int i, rval = 0;
	char *vfstype = NULL;
	char globopt[3];

	globopt[0] = '-';
	globopt[2] = '\0';

	TAILQ_INIT(&selhead);
	TAILQ_INIT(&opthead);

	while ((i = getopt(argc, argv, "dvpfnyl:t:T:")) != -1)
		switch (i) {
		case 'd':
			flags |= CHECK_DEBUG;
			break;

		case 'v':
			flags |= CHECK_VERBOSE;
			break;

		case 'p':
			flags |= CHECK_PREEN;
			/*FALLTHROUGH*/
		case 'n':
		case 'f':
		case 'y':
			globopt[1] = i;
			options = catopt(options, globopt, 1);
			break;

		case 'l':
			maxrun = atoi(optarg);
			break;

		case 'T':
			if (*optarg)
				addoption(optarg);
			break;

		case 't':
			if (selhead.tqh_first != NULL)
				errx(1, "only one -t option may be specified.");

			maketypelist(optarg);
			vfstype = optarg;
			break;

		case '?':
		default:
			usage();
			/* NOTREACHED */
		}

	argc -= optind;
	argv += optind;

	if (argc == 0)
		return checkfstab(flags, maxrun, isok, checkfs);

#define	BADTYPE(type)							\
	(strcmp(type, FSTAB_RO) &&					\
	    strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ))


	for (; argc--; argv++) {
		char *spec, *type;

		if ((fs = getfsfile(*argv)) == NULL &&
		    (fs = getfsspec(*argv)) == NULL) {
			if (vfstype == NULL)
				errx(1,
				    "%s: unknown special file or file system.",
				    *argv);
			spec = *argv;
			type = vfstype;
		}
		else {
			spec = fs->fs_spec;
			type = fs->fs_vfstype;
			if (BADTYPE(fs->fs_type))
				errx(1, "%s has unknown file system type.",
				    *argv);
		}

		rval |= checkfs(type, blockcheck(spec), *argv, NULL, NULL);
	}

	return rval;
}


static void *
isok(fs)
	struct fstab *fs;
{
	if (fs->fs_passno == 0)
		return NULL;

	if (BADTYPE(fs->fs_type))
		return NULL;

	if (!selected(fs->fs_vfstype))
		return NULL;

	return fs;
}


static int
checkfs(vfstype, spec, mntpt, auxarg, pidp)
	const char *vfstype, *spec, *mntpt;
	void *auxarg;
	pid_t *pidp;
{
	/* List of directories containing fsck_xxx subcommands. */
	static const char *edirs[] = {
		_PATH_SBIN,
		_PATH_USRSBIN,
		NULL
	};
	const char **argv, **edir;
	pid_t pid;
	int argc, i, status, maxargc;
	char *optbuf = NULL, execname[MAXPATHLEN + 1];
	const char *extra = getoptions(vfstype);

#ifdef __GNUC__
	/* Avoid vfork clobbering */
	(void) &optbuf;
#endif

	if (strcmp(vfstype, "ufs") == 0)
		vfstype = MOUNT_UFS;

	maxargc = 100;
	argv = emalloc(sizeof(char *) * maxargc);

	argc = 0;
	argv[argc++] = vfstype;

	if (options) {
		if (extra != NULL)
			optbuf = catopt(options, extra, 0);
		else
			optbuf = estrdup(options);
	}
	else if (extra)
		optbuf = estrdup(extra);

	if (optbuf)
		mangle(optbuf, &argc, &argv, &maxargc);

	argv[argc++] = spec;
	argv[argc] = NULL;

	if (flags & (CHECK_DEBUG|CHECK_VERBOSE)) {
		(void)printf("start %s %swait fsck_%s", mntpt, 
			pidp ? "no" : "", vfstype);
		for (i = 1; i < argc; i++)
			(void)printf(" %s", argv[i]);
		(void)printf("\n");
	}

	switch (pid = vfork()) {
	case -1:				/* Error. */
		warn("vfork");
		if (optbuf)
			free(optbuf);
		return (1);

	case 0:					/* Child. */
		if (flags & CHECK_DEBUG)
			_exit(0);

		/* Go find an executable. */
		edir = edirs;
		do {
			(void)snprintf(execname,
			    sizeof(execname), "%s/fsck_%s", *edir, vfstype);
			execv(execname, (char * const *)argv);
			if (errno != ENOENT)
				if (spec)
					warn("exec %s for %s", execname, spec);
				else
					warn("exec %s", execname);
		} while (*++edir != NULL);

		if (errno == ENOENT)
			if (spec)
				warn("exec %s for %s", execname, spec);
			else
				warn("exec %s", execname);
		exit(1);
		/* NOTREACHED */

	default:				/* Parent. */
		if (optbuf)
			free(optbuf);

		if (pidp) {
			*pidp = pid;
			return 0;
		}

		if (waitpid(pid, &status, 0) < 0) {
			warn("waitpid");
			return (1);
		}

		if (WIFEXITED(status)) {
			if (WEXITSTATUS(status) != 0)
				return (WEXITSTATUS(status));
		}
		else if (WIFSIGNALED(status)) {
			warnx("%s: %s", spec, strsignal(WTERMSIG(status)));
			return (1);
		}
		break;
	}

	return (0);
}


static int
selected(type)
	const char *type;
{
	struct entry *e;

	/* If no type specified, it's always selected. */
	for (e = selhead.tqh_first; e != NULL; e = e->entries.tqe_next)
		if (!strncmp(e->type, type, MFSNAMELEN))
			return which == IN_LIST ? 1 : 0;

	return which == IN_LIST ? 0 : 1;
}


static const char *
getoptions(type)
	const char *type;
{
	struct entry *e;

	for (e = opthead.tqh_first; e != NULL; e = e->entries.tqe_next)
		if (!strncmp(e->type, type, MFSNAMELEN))
			return e->options;
	return "";
}


static void
addoption(optstr)
	char *optstr;
{
	char *newoptions;
	struct entry *e;

	if ((newoptions = strchr(optstr, ':')) == NULL)
		errx(1, "Invalid option string");

	*newoptions++ = '\0';

	for (e = opthead.tqh_first; e != NULL; e = e->entries.tqe_next)
		if (!strncmp(e->type, optstr, MFSNAMELEN)) {
			e->options = catopt(e->options, newoptions, 1);
			return;
		}
	addentry(&opthead, optstr, newoptions);
}


static void
addentry(list, type, opts)
	struct fstypelist *list;
	const char *type;
	const char *opts;
{
	struct entry *e;

	e = emalloc(sizeof(struct entry));
	e->type = estrdup(type);
	e->options = estrdup(opts);
	TAILQ_INSERT_TAIL(list, e, entries);
}


static void
maketypelist(fslist)
	char *fslist;
{
	char *ptr;

	if ((fslist == NULL) || (fslist[0] == '\0'))
		errx(1, "empty type list");

	if (fslist[0] == 'n' && fslist[1] == 'o') {
		fslist += 2;
		which = NOT_IN_LIST;
	}
	else
		which = IN_LIST;

	while ((ptr = strsep(&fslist, ",")) != NULL)
		addentry(&selhead, ptr, "");

}


static char *
catopt(s0, s1, fr)
	char *s0;
	const char *s1;
	int fr;
{
	size_t i;
	char *cp;

	if (s0 && *s0) {
		i = strlen(s0) + strlen(s1) + 1 + 1;
		cp = emalloc(i);
		(void)snprintf(cp, i, "%s,%s", s0, s1);
	}
	else
		cp = estrdup(s1);

	if (s0 && fr)
		free(s0);
	return (cp);
}


static void
mangle(opts, argcp, argvp, maxargcp)
	char *opts;
	int *argcp;
	const char ***argvp;
	int *maxargcp;
{
	char *p, *s;
	int argc = *argcp, maxargc = *maxargcp;
	const char **argv = *argvp;

	argc = *argcp;
	maxargc = *maxargcp;

	for (s = opts; (p = strsep(&s, ",")) != NULL;) {
		/* always leave space for one more argument and the NULL */
		if (argc >= maxargc - 3) {
			maxargc += 50;
			argv = erealloc(argv, maxargc * sizeof(char *));
		}
		if (*p != '\0')
			if (*p == '-') {
				argv[argc++] = p;
				p = strchr(p, '=');
				if (p) {
					*p = '\0';
					argv[argc++] = p+1;
				}
			}
			else {
				argv[argc++] = "-o";
				argv[argc++] = p;
			}
	}

	*argcp = argc;
	*argvp = argv;
	*maxargcp = maxargc;
}


static void
usage()
{
	extern char *__progname;
	static const char common[] =
	    "[-dpvlyn] [-T fstype:fsoptions] [-t fstype]";

	(void)fprintf(stderr, "Usage: %s %s [special|node]...\n",
	    __progname, common);
	exit(1);
}