main.c revision 1.27 
1/*	$NetBSD: main.c,v 1.27 2008/02/23 21:41:48 christos 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 * 3. All advertising materials mentioning features or use of this software
44 *    must display the following acknowledgement:
45 *	This product includes software developed by Manuel Bouyer.
46 * 4. The name of the author may not be used to endorse or promote products
47 *    derived from this software without specific prior written permission.
48 *
49 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
50 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
51 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
52 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
53 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
54 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
55 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
56 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
57 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
58 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
59 */
60
61#include <sys/cdefs.h>
62#ifndef lint
63__COPYRIGHT("@(#) Copyright (c) 1980, 1986, 1993\n\
64	The Regents of the University of California.  All rights reserved.\n");
65#endif /* not lint */
66
67#ifndef lint
68#if 0
69static char sccsid[] = "@(#)main.c	8.2 (Berkeley) 1/23/94";
70#else
71__RCSID("$NetBSD: main.c,v 1.27 2008/02/23 21:41:48 christos Exp $");
72#endif
73#endif /* not lint */
74
75#include <sys/param.h>
76#include <sys/time.h>
77#include <sys/mount.h>
78#include <ufs/ufs/ufsmount.h>
79#include <ufs/ext2fs/ext2fs_dinode.h>
80#include <ufs/ext2fs/ext2fs.h>
81#include <fstab.h>
82#include <stdlib.h>
83#include <string.h>
84#include <ctype.h>
85#include <stdio.h>
86#include <time.h>
87#include <unistd.h>
88#include <signal.h>
89
90#include "fsck.h"
91#include "extern.h"
92#include "fsutil.h"
93#include "exitvalues.h"
94
95int	returntosingle = 0;
96
97
98static int	argtoi(int, const char *, const char *, int);
99static int	checkfilesys(const char *, char *, long, int);
100static void	usage(void) __dead;
101
102int
103main(int argc, char *argv[])
104{
105	int ch;
106	int ret = FSCK_EXIT_OK;
107
108	sync();
109	skipclean = 1;
110	while ((ch = getopt(argc, argv, "b:dfm:npqy")) != -1) {
111		switch (ch) {
112		case 'b':
113			skipclean = 0;
114			bflag = argtoi('b', "number", optarg, 10);
115			printf("Alternate super block location: %d\n", bflag);
116			break;
117
118		case 'd':
119			debug++;
120			break;
121
122		case 'f':
123			skipclean = 0;
124			break;
125
126		case 'm':
127			lfmode = argtoi('m', "mode", optarg, 8);
128			if (lfmode &~ 07777)
129				errexit("bad mode to -m: %o\n", lfmode);
130			printf("** lost+found creation mode %o\n", lfmode);
131			break;
132
133		case 'n':
134			nflag++;
135			yflag = 0;
136			break;
137
138		case 'p':
139			preen++;
140			break;
141
142		case 'P':
143			/* Progress meter not implemented. */
144			break;
145
146		case 'q':		/* Quiet not implemented */
147			break;
148
149		case 'y':
150			yflag++;
151			nflag = 0;
152			break;
153
154		default:
155			usage();
156		}
157	}
158
159	argc -= optind;
160	argv += optind;
161
162	if (!argc)
163		usage();
164
165	if (signal(SIGINT, SIG_IGN) != SIG_IGN)
166		(void)signal(SIGINT, catch);
167	if (preen)
168		(void)signal(SIGQUIT, catchquit);
169
170	while (argc-- > 0) {
171		int nret = checkfilesys(blockcheck(*argv++), 0, 0L, 0);
172		if (ret < nret)
173			ret = nret;
174	}
175
176	return returntosingle ? FSCK_EXIT_UNRESOLVED : ret;
177}
178
179static int
180argtoi(int flag, const char *req, const char *str, int base)
181{
182	char *cp;
183	int ret;
184
185	ret = (int)strtol(str, &cp, base);
186	if (cp == str || *cp)
187		errexit("-%c flag requires a %s\n", flag, req);
188	return (ret);
189}
190
191/*
192 * Check the specified filesystem.
193 */
194/* ARGSUSED */
195static int
196checkfilesys(const char *filesys, char *mntpt, long auxdata, int child)
197{
198	daddr_t n_bfree;
199	struct dups *dp;
200	struct zlncnt *zlnp;
201	int i;
202
203	if (preen && child)
204		(void)signal(SIGQUIT, voidquit);
205	setcdevname(filesys, preen);
206	if (debug && preen)
207		pwarn("starting\n");
208	switch (setup(filesys)) {
209	case 0:
210		if (preen)
211			pfatal("CAN'T CHECK FILE SYSTEM.");
212	case -1:
213		return FSCK_EXIT_OK;
214	}
215	/*
216	 * 1: scan inodes tallying blocks used
217	 */
218	if (preen == 0) {
219		if (sblock.e2fs.e2fs_rev > E2FS_REV0) {
220			printf("** Last Mounted on %s\n",
221			    sblock.e2fs.e2fs_fsmnt);
222		}
223		if (hotroot())
224			printf("** Root file system\n");
225		printf("** Phase 1 - Check Blocks and Sizes\n");
226	}
227	pass1();
228
229	/*
230	 * 1b: locate first references to duplicates, if any
231	 */
232	if (duplist) {
233		if (preen)
234			pfatal("INTERNAL ERROR: dups with -p");
235		printf("** Phase 1b - Rescan For More DUPS\n");
236		pass1b();
237	}
238
239	/*
240	 * 2: traverse directories from root to mark all connected directories
241	 */
242	if (preen == 0)
243		printf("** Phase 2 - Check Pathnames\n");
244	pass2();
245
246	/*
247	 * 3: scan inodes looking for disconnected directories
248	 */
249	if (preen == 0)
250		printf("** Phase 3 - Check Connectivity\n");
251	pass3();
252
253	/*
254	 * 4: scan inodes looking for disconnected files; check reference counts
255	 */
256	if (preen == 0)
257		printf("** Phase 4 - Check Reference Counts\n");
258	pass4();
259
260	/*
261	 * 5: check and repair resource counts in cylinder groups
262	 */
263	if (preen == 0)
264		printf("** Phase 5 - Check Cyl groups\n");
265	pass5();
266
267	/*
268	 * print out summary statistics
269	 */
270	n_bfree = sblock.e2fs.e2fs_fbcount;
271
272	pwarn("%lld files, %lld used, %lld free\n",
273	    (long long)n_files, (long long)n_blks, (long long)n_bfree);
274	if (debug &&
275		/* 9 reserved and unused inodes in FS */
276	    (n_files -= maxino - 9 - sblock.e2fs.e2fs_ficount))
277		printf("%lld files missing\n", (long long)n_files);
278	if (debug) {
279		for (i = 0; i < sblock.e2fs_ncg; i++)
280			n_blks +=  cgoverhead(i);
281		n_blks += sblock.e2fs.e2fs_first_dblock;
282		if (n_blks -= maxfsblock - n_bfree)
283			printf("%lld blocks missing\n", (long long)n_blks);
284		if (duplist != NULL) {
285			printf("The following duplicate blocks remain:");
286			for (dp = duplist; dp; dp = dp->next)
287				printf(" %lld,", (long long)dp->dup);
288			printf("\n");
289		}
290		if (zlnhead != NULL) {
291			printf("The following zero link count inodes remain:");
292			for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
293				printf(" %llu,",
294				    (unsigned long long)zlnp->zlncnt);
295			printf("\n");
296		}
297	}
298	zlnhead = (struct zlncnt *)0;
299	duplist = (struct dups *)0;
300	muldup = (struct dups *)0;
301	inocleanup();
302	if (fsmodified) {
303		time_t t;
304		(void)time(&t);
305		sblock.e2fs.e2fs_wtime = t;
306		sblock.e2fs.e2fs_lastfsck = t;
307		sbdirty();
308	}
309	ckfini(1);
310	free(blockmap);
311	free(statemap);
312	free((char *)lncntp);
313	if (!fsmodified)
314		return FSCK_EXIT_OK;
315	if (!preen)
316		printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
317	if (rerun)
318		printf("\n***** PLEASE RERUN FSCK *****\n");
319	if (hotroot()) {
320		struct statvfs stfs_buf;
321		/*
322		 * We modified the root.  Do a mount update on
323		 * it, unless it is read-write, so we can continue.
324		 */
325		if (statvfs("/", &stfs_buf) == 0) {
326			long flags = stfs_buf.f_flag;
327			struct ufs_args args;
328
329			if (flags & MNT_RDONLY) {
330				args.fspec = 0;
331				flags |= MNT_UPDATE | MNT_RELOAD;
332				if (mount(MOUNT_EXT2FS, "/", flags,
333				    &args, sizeof args) == 0)
334					return FSCK_EXIT_OK;
335			}
336		}
337		if (!preen)
338			printf("\n***** REBOOT NOW *****\n");
339		sync();
340		return FSCK_EXIT_ROOT_CHANGED;
341	}
342	return FSCK_EXIT_OK;
343}
344
345static void
346usage(void)
347{
348
349	(void) fprintf(stderr,
350	    "Usage: %s [-dfnpy] [-b block] [-c level] [-m mode] filesystem ...\n",
351	    getprogname());
352	exit(FSCK_EXIT_USAGE);
353}
354
355