fsck.c revision 1.35 
1/*	$OpenBSD: fsck.c,v 1.35 2015/04/18 18:28:37 deraadt Exp $	*/
2/*	$NetBSD: fsck.c,v 1.7 1996/10/03 20:06:30 christos Exp $	*/
3
4/*
5 * Copyright (c) 1996 Christos Zoulas. All rights reserved.
6 * Copyright (c) 1980, 1989, 1993, 1994
7 *	The Regents of the University of California.  All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * From: @(#)mount.c	8.19 (Berkeley) 4/19/94
34 * From: NetBSD: mount.c,v 1.24 1995/11/18 03:34:29 cgd Exp
35 *
36 */
37
38#include <sys/types.h>
39#include <sys/mount.h>
40#include <sys/queue.h>
41#include <sys/resource.h>
42#include <sys/wait.h>
43
44#include <err.h>
45#include <errno.h>
46#include <fstab.h>
47#include <signal.h>
48#include <stdio.h>
49#include <stdlib.h>
50#include <string.h>
51#include <unistd.h>
52#include <limits.h>
53#include <util.h>
54
55#include "pathnames.h"
56#include "fsutil.h"
57
58static enum { IN_LIST, NOT_IN_LIST } which = NOT_IN_LIST;
59static enum { NONET_FILTER, NET_FILTER } filter = NONET_FILTER;
60
61TAILQ_HEAD(fstypelist, entry) opthead, selhead;
62
63struct entry {
64	char *type;
65	char *options;
66	TAILQ_ENTRY(entry) entries;
67};
68
69static int maxrun;
70static char *options;
71static int flags;
72
73int main(int, char *[]);
74
75static int checkfs(const char *, const char *, const char *, void *, pid_t *);
76static int selected(const char *);
77static void addoption(char *);
78static const char *getoptions(const char *);
79static void addentry(struct fstypelist *, const char *, const char *);
80static void maketypelist(char *);
81static char *catopt(char *, const char *, int);
82static void mangle(char *, int *, const char ***, int *);
83static void usage(void);
84static void *isok(struct fstab *);
85static int hasopt(const char *, const char *);
86
87
88int
89main(int argc, char *argv[])
90{
91	const char *errstr;
92	struct fstab *fs;
93	int i, rval = 0;
94	char *vfstype = NULL;
95	char *p, globopt[3];
96	struct rlimit rl;
97
98	/* Increase our data size to the max */
99	if (getrlimit(RLIMIT_DATA, &rl) == 0) {
100		if (geteuid() == 0)
101			rl.rlim_cur = rl.rlim_max = RLIM_INFINITY;
102		else
103			rl.rlim_cur = rl.rlim_max;
104		if (setrlimit(RLIMIT_DATA, &rl) < 0)
105			warn("Can't set resource limit to max data size");
106	} else
107		warn("Can't get resource limit for data size");
108
109	globopt[0] = '-';
110	globopt[2] = '\0';
111
112	TAILQ_INIT(&selhead);
113	TAILQ_INIT(&opthead);
114
115	while ((i = getopt(argc, argv, "b:dfl:nNpT:t:vy")) != -1)
116		switch (i) {
117		case 'd':
118			flags |= CHECK_DEBUG;
119			break;
120
121		case 'v':
122			flags |= CHECK_VERBOSE;
123			break;
124
125		case 'p':
126			flags |= CHECK_PREEN;
127			/*FALLTHROUGH*/
128		case 'n':
129		case 'f':
130		case 'y':
131			globopt[1] = i;
132			options = catopt(options, globopt, 1);
133			break;
134
135		case 'b':
136			if (asprintf(&p, "-b %s", optarg) == -1)
137				err(1, "malloc failed");
138			options = catopt(options, p, 1);
139			free(p);
140			break;
141
142		case 'l':
143			maxrun = strtonum(optarg, 0, INT_MAX, &errstr);
144			if (errstr)
145				errx(1, "-l %s: %s", optarg, errstr);
146
147			break;
148
149		case 'T':
150			if (*optarg)
151				addoption(optarg);
152			break;
153
154		case 't':
155			if (!TAILQ_EMPTY(&selhead))
156				errx(1, "only one -t option may be specified.");
157
158			maketypelist(optarg);
159			vfstype = optarg;
160			break;
161
162		case 'N':
163			filter = NET_FILTER;
164			break;
165
166		case '?':
167		default:
168			usage();
169			/* NOTREACHED */
170		}
171
172	argc -= optind;
173	argv += optind;
174
175	if (argc == 0)
176		return checkfstab(flags, maxrun, isok, checkfs);
177
178#define	BADTYPE(type)							\
179	(strcmp(type, FSTAB_RO) &&					\
180	    strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ))
181
182
183	for (; argc--; argv++) {
184		char *spec, *type;
185
186		if ((strncmp(*argv, "/dev/", 5) == 0 || isduid(*argv, 0)) &&
187		    (type = readlabelfs(*argv, 0))) {
188			spec = *argv;
189		} else if ((fs = getfsfile(*argv)) == NULL &&
190		    (fs = getfsspec(*argv)) == NULL) {
191			if (vfstype == NULL)
192				errx(1,
193				    "%s: unknown special file or file system.",
194				    *argv);
195			spec = *argv;
196			type = vfstype;
197		} else {
198			spec = fs->fs_spec;
199			type = fs->fs_vfstype;
200			if (BADTYPE(fs->fs_type))
201				errx(1, "%s has unknown file system type.",
202				    *argv);
203		}
204
205		rval |= checkfs(type, blockcheck(spec), *argv, NULL, NULL);
206	}
207
208	return rval;
209}
210
211
212static void *
213isok(struct fstab *fs)
214{
215	if (fs->fs_passno == 0)
216		return NULL;
217
218	if (BADTYPE(fs->fs_type))
219		return NULL;
220
221	switch (filter) {
222	case NET_FILTER:
223		if (!hasopt(fs->fs_mntops, "net"))
224			return NULL;
225		break;
226	case NONET_FILTER:
227		if (hasopt(fs->fs_mntops, "net"))
228			return NULL;
229		break;
230	}
231	if (!selected(fs->fs_vfstype))
232		return NULL;
233
234	return fs;
235}
236
237
238static int
239checkfs(const char *vfstype, const char *spec, const char *mntpt, void *auxarg,
240    pid_t *pidp)
241{
242	/* List of directories containing fsck_xxx subcommands. */
243	static const char *edirs[] = {
244		_PATH_SBIN,
245		_PATH_USRSBIN,
246		NULL
247	};
248	const char **argv, **edir;
249	pid_t pid;
250	int argc, i, status, maxargc;
251	char *optbuf = NULL, fsname[PATH_MAX], execname[PATH_MAX];
252	const char *extra = getoptions(vfstype);
253
254	if (strcmp(vfstype, "ufs") == 0)
255		vfstype = MOUNT_UFS;
256
257	maxargc = 100;
258	argv = ereallocarray(NULL, maxargc, sizeof(char *));
259
260	argc = 0;
261	(void)snprintf(fsname, sizeof(fsname), "fsck_%s", vfstype);
262	argv[argc++] = fsname;
263
264	if (options) {
265		if (extra != NULL)
266			optbuf = catopt(options, extra, 0);
267		else
268			optbuf = estrdup(options);
269	}
270	else if (extra)
271		optbuf = estrdup(extra);
272
273	if (optbuf)
274		mangle(optbuf, &argc, &argv, &maxargc);
275
276	argv[argc++] = spec;
277	argv[argc] = NULL;
278
279	if (flags & (CHECK_DEBUG|CHECK_VERBOSE)) {
280		(void)printf("start %s %swait %s", mntpt,
281			pidp ? "no" : "", fsname);
282		for (i = 1; i < argc; i++)
283			(void)printf(" %s", argv[i]);
284		(void)printf("\n");
285	}
286
287	switch (pid = fork()) {
288	case -1:				/* Error. */
289		warn("fork");
290		if (optbuf)
291			free(optbuf);
292		free(argv);
293		return (1);
294
295	case 0:					/* Child. */
296		if (flags & CHECK_DEBUG)
297			_exit(0);
298
299		/* Go find an executable. */
300		edir = edirs;
301		do {
302			(void)snprintf(execname,
303			    sizeof(execname), "%s/fsck_%s", *edir, vfstype);
304			execv(execname, (char * const *)argv);
305			if (errno != ENOENT) {
306				if (spec)
307					warn("exec %s for %s", execname, spec);
308				else
309					warn("exec %s", execname);
310			}
311		} while (*++edir != NULL);
312
313		if (errno == ENOENT) {
314			if (spec)
315				warn("exec %s for %s", execname, spec);
316			else
317				warn("exec %s", execname);
318		}
319		exit(1);
320		/* NOTREACHED */
321
322	default:				/* Parent. */
323		if (optbuf)
324			free(optbuf);
325		free(argv);
326
327		if (pidp) {
328			*pidp = pid;
329			return 0;
330		}
331
332		if (waitpid(pid, &status, 0) < 0) {
333			warn("waitpid");
334			return (1);
335		}
336
337		if (WIFEXITED(status)) {
338			if (WEXITSTATUS(status) != 0)
339				return (WEXITSTATUS(status));
340		}
341		else if (WIFSIGNALED(status)) {
342			warnx("%s: %s", spec, strsignal(WTERMSIG(status)));
343			return (1);
344		}
345		break;
346	}
347
348	return (0);
349}
350
351
352static int
353selected(const char *type)
354{
355	struct entry *e;
356
357	/* If no type specified, it's always selected. */
358	TAILQ_FOREACH(e, &selhead, entries)
359		if (!strncmp(e->type, type, MFSNAMELEN))
360			return which == IN_LIST ? 1 : 0;
361
362	return which == IN_LIST ? 0 : 1;
363}
364
365
366static const char *
367getoptions(const char *type)
368{
369	struct entry *e;
370
371	TAILQ_FOREACH(e, &opthead, entries)
372		if (!strncmp(e->type, type, MFSNAMELEN))
373			return e->options;
374	return "";
375}
376
377
378static void
379addoption(char *optstr)
380{
381	char *newoptions;
382	struct entry *e;
383
384	if ((newoptions = strchr(optstr, ':')) == NULL)
385		errx(1, "Invalid option string");
386
387	*newoptions++ = '\0';
388
389	TAILQ_FOREACH(e, &opthead, entries)
390		if (!strncmp(e->type, optstr, MFSNAMELEN)) {
391			e->options = catopt(e->options, newoptions, 1);
392			return;
393		}
394	addentry(&opthead, optstr, newoptions);
395}
396
397
398static void
399addentry(struct fstypelist *list, const char *type, const char *opts)
400{
401	struct entry *e;
402
403	e = emalloc(sizeof(struct entry));
404	e->type = estrdup(type);
405	e->options = estrdup(opts);
406	TAILQ_INSERT_TAIL(list, e, entries);
407}
408
409
410static void
411maketypelist(char *fslist)
412{
413	char *ptr;
414
415	if ((fslist == NULL) || (fslist[0] == '\0'))
416		errx(1, "empty type list");
417
418	if (fslist[0] == 'n' && fslist[1] == 'o') {
419		fslist += 2;
420		which = NOT_IN_LIST;
421	}
422	else
423		which = IN_LIST;
424
425	while ((ptr = strsep(&fslist, ",")) != NULL)
426		addentry(&selhead, ptr, "");
427
428}
429
430
431static char *
432catopt(char *s0, const char *s1, int fr)
433{
434	char *cp;
435
436	if (s0 && *s0) {
437		if (asprintf(&cp, "%s,%s", s0, s1) == -1)
438			err(1, "malloc failed");
439	} else
440		cp = estrdup(s1);
441
442	if (s0 && fr)
443		free(s0);
444	return (cp);
445}
446
447
448static void
449mangle(char *opts, int *argcp, const char ***argvp, int *maxargcp)
450{
451	char *p, *s;
452	int argc = *argcp, maxargc = *maxargcp;
453	const char **argv = *argvp;
454
455	argc = *argcp;
456	maxargc = *maxargcp;
457
458	for (s = opts; (p = strsep(&s, ",")) != NULL;) {
459		/* always leave space for one more argument and the NULL */
460		if (argc >= maxargc - 3) {
461			int newmaxargc = maxargc + 50;
462
463			argv = ereallocarray(argv, newmaxargc, sizeof(char *));
464			maxargc = newmaxargc;
465		}
466		if (*p != '\0') {
467			if (*p == '-') {
468				argv[argc++] = p;
469				p = strchr(p, '=');
470				if (p) {
471					*p = '\0';
472					argv[argc++] = p+1;
473				}
474			}
475			else {
476				argv[argc++] = "-o";
477				argv[argc++] = p;
478			}
479		}
480	}
481
482	*argcp = argc;
483	*argvp = argv;
484	*maxargcp = maxargc;
485}
486
487static int
488hasopt(const char *mntopts, const char *option)
489{
490	int found;
491	char *opt, *optbuf;
492
493	if (mntopts == NULL)
494		return (0);
495	optbuf = strdup(mntopts);
496	found = 0;
497	for (opt = optbuf; !found && opt != NULL; strsep(&opt, ","))
498		found = !strncmp(opt, option, strlen(option));
499	free(optbuf);
500	return (found);
501}
502
503
504static void
505usage(void)
506{
507	extern char *__progname;
508
509	fprintf(stderr, "usage: %s "
510	    "[-dfNnpvy] [-b block#] [-l maxparallel] [-T fstype:fsoptions]\n"
511	    "            [-t fstype] [special | node ...]\n", __progname);
512	exit(1);
513}
514