fsck.c revision 1.33 
1/*	$OpenBSD: fsck.c,v 1.33 2015/01/16 06:39:57 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	struct fstab *fs;
92	int i, rval = 0;
93	char *vfstype = NULL;
94	char *p, globopt[3];
95	struct rlimit rl;
96
97	/* Increase our data size to the max */
98	if (getrlimit(RLIMIT_DATA, &rl) == 0) {
99		if (geteuid() == 0)
100			rl.rlim_cur = rl.rlim_max = RLIM_INFINITY;
101		else
102			rl.rlim_cur = rl.rlim_max;
103		if (setrlimit(RLIMIT_DATA, &rl) < 0)
104			warn("Can't get resource limit to max data size");
105	} else
106		warn("Can't get resource limit for data size");
107
108	globopt[0] = '-';
109	globopt[2] = '\0';
110
111	TAILQ_INIT(&selhead);
112	TAILQ_INIT(&opthead);
113
114	while ((i = getopt(argc, argv, "b:dfl:nNpT:t:vy")) != -1)
115		switch (i) {
116		case 'd':
117			flags |= CHECK_DEBUG;
118			break;
119
120		case 'v':
121			flags |= CHECK_VERBOSE;
122			break;
123
124		case 'p':
125			flags |= CHECK_PREEN;
126			/*FALLTHROUGH*/
127		case 'n':
128		case 'f':
129		case 'y':
130			globopt[1] = i;
131			options = catopt(options, globopt, 1);
132			break;
133
134		case 'b':
135			if (asprintf(&p, "-b %s", optarg) == -1)
136				err(1, "malloc failed");
137			options = catopt(options, p, 1);
138			free(p);
139			break;
140
141		case 'l':
142			maxrun = atoi(optarg);
143			break;
144
145		case 'T':
146			if (*optarg)
147				addoption(optarg);
148			break;
149
150		case 't':
151			if (!TAILQ_EMPTY(&selhead))
152				errx(1, "only one -t option may be specified.");
153
154			maketypelist(optarg);
155			vfstype = optarg;
156			break;
157
158		case 'N':
159			filter = NET_FILTER;
160			break;
161
162		case '?':
163		default:
164			usage();
165			/* NOTREACHED */
166		}
167
168	argc -= optind;
169	argv += optind;
170
171	if (argc == 0)
172		return checkfstab(flags, maxrun, isok, checkfs);
173
174#define	BADTYPE(type)							\
175	(strcmp(type, FSTAB_RO) &&					\
176	    strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ))
177
178
179	for (; argc--; argv++) {
180		char *spec, *type;
181
182		if ((strncmp(*argv, "/dev/", 5) == 0 || isduid(*argv, 0)) &&
183		    (type = readlabelfs(*argv, 0))) {
184			spec = *argv;
185		} else if ((fs = getfsfile(*argv)) == NULL &&
186		    (fs = getfsspec(*argv)) == NULL) {
187			if (vfstype == NULL)
188				errx(1,
189				    "%s: unknown special file or file system.",
190				    *argv);
191			spec = *argv;
192			type = vfstype;
193		} else {
194			spec = fs->fs_spec;
195			type = fs->fs_vfstype;
196			if (BADTYPE(fs->fs_type))
197				errx(1, "%s has unknown file system type.",
198				    *argv);
199		}
200
201		rval |= checkfs(type, blockcheck(spec), *argv, NULL, NULL);
202	}
203
204	return rval;
205}
206
207
208static void *
209isok(struct fstab *fs)
210{
211	if (fs->fs_passno == 0)
212		return NULL;
213
214	if (BADTYPE(fs->fs_type))
215		return NULL;
216
217	switch (filter) {
218	case NET_FILTER:
219		if (!hasopt(fs->fs_mntops, "net"))
220			return NULL;
221		break;
222	case NONET_FILTER:
223		if (hasopt(fs->fs_mntops, "net"))
224			return NULL;
225		break;
226	}
227	if (!selected(fs->fs_vfstype))
228		return NULL;
229
230	return fs;
231}
232
233
234static int
235checkfs(const char *vfstype, const char *spec, const char *mntpt, void *auxarg,
236    pid_t *pidp)
237{
238	/* List of directories containing fsck_xxx subcommands. */
239	static const char *edirs[] = {
240		_PATH_SBIN,
241		_PATH_USRSBIN,
242		NULL
243	};
244	const char **argv, **edir;
245	pid_t pid;
246	int argc, i, status, maxargc;
247	char *optbuf = NULL, fsname[PATH_MAX], execname[PATH_MAX];
248	const char *extra = getoptions(vfstype);
249
250	if (strcmp(vfstype, "ufs") == 0)
251		vfstype = MOUNT_UFS;
252
253	maxargc = 100;
254	argv = ereallocarray(NULL, maxargc, sizeof(char *));
255
256	argc = 0;
257	(void)snprintf(fsname, sizeof(fsname), "fsck_%s", vfstype);
258	argv[argc++] = fsname;
259
260	if (options) {
261		if (extra != NULL)
262			optbuf = catopt(options, extra, 0);
263		else
264			optbuf = estrdup(options);
265	}
266	else if (extra)
267		optbuf = estrdup(extra);
268
269	if (optbuf)
270		mangle(optbuf, &argc, &argv, &maxargc);
271
272	argv[argc++] = spec;
273	argv[argc] = NULL;
274
275	if (flags & (CHECK_DEBUG|CHECK_VERBOSE)) {
276		(void)printf("start %s %swait %s", mntpt,
277			pidp ? "no" : "", fsname);
278		for (i = 1; i < argc; i++)
279			(void)printf(" %s", argv[i]);
280		(void)printf("\n");
281	}
282
283	switch (pid = fork()) {
284	case -1:				/* Error. */
285		warn("fork");
286		if (optbuf)
287			free(optbuf);
288		free(argv);
289		return (1);
290
291	case 0:					/* Child. */
292		if (flags & CHECK_DEBUG)
293			_exit(0);
294
295		/* Go find an executable. */
296		edir = edirs;
297		do {
298			(void)snprintf(execname,
299			    sizeof(execname), "%s/fsck_%s", *edir, vfstype);
300			execv(execname, (char * const *)argv);
301			if (errno != ENOENT) {
302				if (spec)
303					warn("exec %s for %s", execname, spec);
304				else
305					warn("exec %s", execname);
306			}
307		} while (*++edir != NULL);
308
309		if (errno == ENOENT) {
310			if (spec)
311				warn("exec %s for %s", execname, spec);
312			else
313				warn("exec %s", execname);
314		}
315		exit(1);
316		/* NOTREACHED */
317
318	default:				/* Parent. */
319		if (optbuf)
320			free(optbuf);
321		free(argv);
322
323		if (pidp) {
324			*pidp = pid;
325			return 0;
326		}
327
328		if (waitpid(pid, &status, 0) < 0) {
329			warn("waitpid");
330			return (1);
331		}
332
333		if (WIFEXITED(status)) {
334			if (WEXITSTATUS(status) != 0)
335				return (WEXITSTATUS(status));
336		}
337		else if (WIFSIGNALED(status)) {
338			warnx("%s: %s", spec, strsignal(WTERMSIG(status)));
339			return (1);
340		}
341		break;
342	}
343
344	return (0);
345}
346
347
348static int
349selected(const char *type)
350{
351	struct entry *e;
352
353	/* If no type specified, it's always selected. */
354	TAILQ_FOREACH(e, &selhead, entries)
355		if (!strncmp(e->type, type, MFSNAMELEN))
356			return which == IN_LIST ? 1 : 0;
357
358	return which == IN_LIST ? 0 : 1;
359}
360
361
362static const char *
363getoptions(const char *type)
364{
365	struct entry *e;
366
367	TAILQ_FOREACH(e, &opthead, entries)
368		if (!strncmp(e->type, type, MFSNAMELEN))
369			return e->options;
370	return "";
371}
372
373
374static void
375addoption(char *optstr)
376{
377	char *newoptions;
378	struct entry *e;
379
380	if ((newoptions = strchr(optstr, ':')) == NULL)
381		errx(1, "Invalid option string");
382
383	*newoptions++ = '\0';
384
385	TAILQ_FOREACH(e, &opthead, entries)
386		if (!strncmp(e->type, optstr, MFSNAMELEN)) {
387			e->options = catopt(e->options, newoptions, 1);
388			return;
389		}
390	addentry(&opthead, optstr, newoptions);
391}
392
393
394static void
395addentry(struct fstypelist *list, const char *type, const char *opts)
396{
397	struct entry *e;
398
399	e = emalloc(sizeof(struct entry));
400	e->type = estrdup(type);
401	e->options = estrdup(opts);
402	TAILQ_INSERT_TAIL(list, e, entries);
403}
404
405
406static void
407maketypelist(char *fslist)
408{
409	char *ptr;
410
411	if ((fslist == NULL) || (fslist[0] == '\0'))
412		errx(1, "empty type list");
413
414	if (fslist[0] == 'n' && fslist[1] == 'o') {
415		fslist += 2;
416		which = NOT_IN_LIST;
417	}
418	else
419		which = IN_LIST;
420
421	while ((ptr = strsep(&fslist, ",")) != NULL)
422		addentry(&selhead, ptr, "");
423
424}
425
426
427static char *
428catopt(char *s0, const char *s1, int fr)
429{
430	char *cp;
431
432	if (s0 && *s0) {
433		if (asprintf(&cp, "%s,%s", s0, s1) == -1)
434			err(1, "malloc failed");
435	} else
436		cp = estrdup(s1);
437
438	if (s0 && fr)
439		free(s0);
440	return (cp);
441}
442
443
444static void
445mangle(char *opts, int *argcp, const char ***argvp, int *maxargcp)
446{
447	char *p, *s;
448	int argc = *argcp, maxargc = *maxargcp;
449	const char **argv = *argvp;
450
451	argc = *argcp;
452	maxargc = *maxargcp;
453
454	for (s = opts; (p = strsep(&s, ",")) != NULL;) {
455		/* always leave space for one more argument and the NULL */
456		if (argc >= maxargc - 3) {
457			int newmaxargc = maxargc + 50;
458
459			argv = ereallocarray(argv, newmaxargc, sizeof(char *));
460			maxargc = newmaxargc;
461		}
462		if (*p != '\0') {
463			if (*p == '-') {
464				argv[argc++] = p;
465				p = strchr(p, '=');
466				if (p) {
467					*p = '\0';
468					argv[argc++] = p+1;
469				}
470			}
471			else {
472				argv[argc++] = "-o";
473				argv[argc++] = p;
474			}
475		}
476	}
477
478	*argcp = argc;
479	*argvp = argv;
480	*maxargcp = maxargc;
481}
482
483static int
484hasopt(const char *mntopts, const char *option)
485{
486	int found;
487	char *opt, *optbuf;
488
489	if (mntopts == NULL)
490		return (0);
491	optbuf = strdup(mntopts);
492	found = 0;
493	for (opt = optbuf; !found && opt != NULL; strsep(&opt, ","))
494		found = !strncmp(opt, option, strlen(option));
495	free(optbuf);
496	return (found);
497}
498
499
500static void
501usage(void)
502{
503	extern char *__progname;
504
505	fprintf(stderr, "usage: %s "
506	    "[-dfNnpvy] [-b block#] [-l maxparallel] [-T fstype:fsoptions]\n"
507	    "            [-t fstype] [special | node ...]\n", __progname);
508	exit(1);
509}
510