main.c revision 1.34 
1/*	$NetBSD: main.c,v 1.34 2009/10/19 18:41:08 bouyer Exp $	*/
2
3/*
4 * Copyright (c) 1980, 1986, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32/*
33 * Copyright (c) 1997 Manuel Bouyer.
34 *
35 * Redistribution and use in source and binary forms, with or without
36 * modification, are permitted provided that the following conditions
37 * are met:
38 * 1. Redistributions of source code must retain the above copyright
39 *    notice, this list of conditions and the following disclaimer.
40 * 2. Redistributions in binary form must reproduce the above copyright
41 *    notice, this list of conditions and the following disclaimer in the
42 *    documentation and/or other materials provided with the distribution.
43 *
44 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
45 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
46 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
47 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
48 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
49 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
50 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
51 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
52 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
53 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
54 */
55
56#include <sys/cdefs.h>
57#ifndef lint
58__COPYRIGHT("@(#) Copyright (c) 1980, 1986, 1993\
59 The Regents of the University of California.  All rights reserved.");
60#endif /* not lint */
61
62#ifndef lint
63#if 0
64static char sccsid[] = "@(#)main.c	8.2 (Berkeley) 1/23/94";
65#else
66__RCSID("$NetBSD: main.c,v 1.34 2009/10/19 18:41:08 bouyer Exp $");
67#endif
68#endif /* not lint */
69
70#include <sys/param.h>
71#include <sys/time.h>
72#include <sys/mount.h>
73#include <ufs/ufs/ufsmount.h>
74#include <ufs/ext2fs/ext2fs_dinode.h>
75#include <ufs/ext2fs/ext2fs.h>
76#include <fstab.h>
77#include <stdlib.h>
78#include <string.h>
79#include <ctype.h>
80#include <stdio.h>
81#include <time.h>
82#include <unistd.h>
83#include <signal.h>
84
85#include "fsck.h"
86#include "extern.h"
87#include "fsutil.h"
88#include "exitvalues.h"
89
90int	returntosingle = 0;
91
92
93static int	argtoi(int, const char *, const char *, int);
94static int	checkfilesys(const char *, char *, long, int);
95static void	usage(void) __dead;
96
97int
98main(int argc, char *argv[])
99{
100	int ch;
101	int ret = FSCK_EXIT_OK;
102
103	sync();
104	skipclean = 1;
105	while ((ch = getopt(argc, argv, "b:dfm:npPqUy")) != -1) {
106		switch (ch) {
107		case 'b':
108			skipclean = 0;
109			bflag = argtoi('b', "number", optarg, 10);
110			printf("Alternate super block location: %d\n", bflag);
111			break;
112
113		case 'd':
114			debug++;
115			break;
116
117		case 'f':
118			skipclean = 0;
119			break;
120
121		case 'm':
122			lfmode = argtoi('m', "mode", optarg, 8);
123			if (lfmode &~ 07777)
124				errexit("bad mode to -m: %o", lfmode);
125			printf("** lost+found creation mode %o\n", lfmode);
126			break;
127
128		case 'n':
129			nflag++;
130			yflag = 0;
131			break;
132
133		case 'p':
134			preen++;
135			break;
136
137		case 'P':
138			/* Progress meter not implemented. */
139			break;
140
141		case 'q':		/* Quiet not implemented */
142			break;
143
144#ifndef SMALL
145		case 'U':
146			Uflag++;
147			break;
148#endif
149
150		case 'y':
151			yflag++;
152			nflag = 0;
153			break;
154
155		default:
156			usage();
157		}
158	}
159
160	argc -= optind;
161	argv += optind;
162
163	if (!argc)
164		usage();
165
166	if (signal(SIGINT, SIG_IGN) != SIG_IGN)
167		(void)signal(SIGINT, catch);
168	if (preen)
169		(void)signal(SIGQUIT, catchquit);
170
171	while (argc-- > 0) {
172		int nret = checkfilesys(blockcheck(*argv++), 0, 0L, 0);
173		if (ret < nret)
174			ret = nret;
175	}
176
177	return returntosingle ? FSCK_EXIT_UNRESOLVED : ret;
178}
179
180static int
181argtoi(int flag, const char *req, const char *str, int base)
182{
183	char *cp;
184	int ret;
185
186	ret = (int)strtol(str, &cp, base);
187	if (cp == str || *cp)
188		errexit("-%c flag requires a %s", flag, req);
189	return (ret);
190}
191
192/*
193 * Check the specified filesystem.
194 */
195/* ARGSUSED */
196static int
197checkfilesys(const char *filesys, char *mntpt, long auxdata, int child)
198{
199	daddr_t n_bfree;
200	struct dups *dp;
201	struct zlncnt *zlnp;
202	int i;
203
204	if (preen && child)
205		(void)signal(SIGQUIT, voidquit);
206	setcdevname(filesys, preen);
207	if (debug && preen)
208		pwarn("starting\n");
209	switch (setup(filesys)) {
210	case 0:
211		if (preen)
212			pfatal("CAN'T CHECK FILE SYSTEM.");
213	case -1:
214		return FSCK_EXIT_OK;
215	}
216	/*
217	 * 1: scan inodes tallying blocks used
218	 */
219	if (preen == 0) {
220		if (sblock.e2fs.e2fs_rev > E2FS_REV0) {
221			printf("** Last Mounted on %s\n",
222			    sblock.e2fs.e2fs_fsmnt);
223		}
224		if (hotroot())
225			printf("** Root file system\n");
226		printf("** Phase 1 - Check Blocks and Sizes\n");
227	}
228	pass1();
229
230	/*
231	 * 1b: locate first references to duplicates, if any
232	 */
233	if (duplist) {
234		if (preen)
235			pfatal("INTERNAL ERROR: dups with -p");
236		printf("** Phase 1b - Rescan For More DUPS\n");
237		pass1b();
238	}
239
240	/*
241	 * 2: traverse directories from root to mark all connected directories
242	 */
243	if (preen == 0)
244		printf("** Phase 2 - Check Pathnames\n");
245	pass2();
246
247	/*
248	 * 3: scan inodes looking for disconnected directories
249	 */
250	if (preen == 0)
251		printf("** Phase 3 - Check Connectivity\n");
252	pass3();
253
254	/*
255	 * 4: scan inodes looking for disconnected files; check reference counts
256	 */
257	if (preen == 0)
258		printf("** Phase 4 - Check Reference Counts\n");
259	pass4();
260
261	/*
262	 * 5: check and repair resource counts in cylinder groups
263	 */
264	if (preen == 0)
265		printf("** Phase 5 - Check Cyl groups\n");
266	pass5();
267
268	/*
269	 * print out summary statistics
270	 */
271	n_bfree = sblock.e2fs.e2fs_fbcount;
272
273	pwarn("%lld files, %lld used, %lld free\n",
274	    (long long)n_files, (long long)n_blks, (long long)n_bfree);
275	if (debug &&
276		/* 9 reserved and unused inodes in FS */
277	    (n_files -= maxino - 9 - sblock.e2fs.e2fs_ficount))
278		printf("%lld files missing\n", (long long)n_files);
279	if (debug) {
280		for (i = 0; i < sblock.e2fs_ncg; i++)
281			n_blks +=  cgoverhead(i);
282		n_blks += sblock.e2fs.e2fs_first_dblock;
283		if (n_blks -= maxfsblock - n_bfree)
284			printf("%lld blocks missing\n", (long long)n_blks);
285		if (duplist != NULL) {
286			printf("The following duplicate blocks remain:");
287			for (dp = duplist; dp; dp = dp->next)
288				printf(" %lld,", (long long)dp->dup);
289			printf("\n");
290		}
291		if (zlnhead != NULL) {
292			printf("The following zero link count inodes remain:");
293			for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
294				printf(" %llu,",
295				    (unsigned long long)zlnp->zlncnt);
296			printf("\n");
297		}
298	}
299	zlnhead = (struct zlncnt *)0;
300	duplist = (struct dups *)0;
301	muldup = (struct dups *)0;
302	inocleanup();
303	if (fsmodified) {
304		time_t t;
305		(void)time(&t);
306		sblock.e2fs.e2fs_wtime = t;
307		sblock.e2fs.e2fs_lastfsck = t;
308		sbdirty();
309	}
310	ckfini(1);
311	free(blockmap);
312	free(statemap);
313	free((char *)lncntp);
314	if (!fsmodified)
315		return FSCK_EXIT_OK;
316	if (!preen)
317		printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
318	if (rerun)
319		printf("\n***** PLEASE RERUN FSCK *****\n");
320	if (hotroot()) {
321		struct statvfs stfs_buf;
322		/*
323		 * We modified the root.  Do a mount update on
324		 * it, unless it is read-write, so we can continue.
325		 */
326		if (statvfs("/", &stfs_buf) == 0) {
327			long flags = stfs_buf.f_flag;
328			struct ufs_args args;
329
330			if (flags & MNT_RDONLY) {
331				args.fspec = 0;
332				flags |= MNT_UPDATE | MNT_RELOAD;
333				if (mount(MOUNT_EXT2FS, "/", flags,
334				    &args, sizeof args) == 0)
335					return FSCK_EXIT_OK;
336			}
337		}
338		if (!preen)
339			printf("\n***** REBOOT NOW *****\n");
340		sync();
341		return FSCK_EXIT_ROOT_CHANGED;
342	}
343	return FSCK_EXIT_OK;
344}
345
346static void
347usage(void)
348{
349
350	(void) fprintf(stderr,
351	    "usage: %s [-dfnpUy] [-b block] [-c level] [-m mode] filesystem ...\n",
352	    getprogname());
353	exit(FSCK_EXIT_USAGE);
354}
355
356