1/*	$NetBSD: main.c,v 1.36 2010/01/07 01:39:56 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 *
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 1.36 2010/01/07 01:39:56 christos 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
90volatile sig_atomic_t	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	ckfinish = ckfini;
104	sync();
105	skipclean = 1;
106	while ((ch = getopt(argc, argv, "b:dfm:npPqUy")) != -1) {
107		switch (ch) {
108		case 'b':
109			skipclean = 0;
110			bflag = argtoi('b', "number", optarg, 10);
111			printf("Alternate super block location: %d\n", bflag);
112			break;
113
114		case 'd':
115			debug++;
116			break;
117
118		case 'f':
119			skipclean = 0;
120			break;
121
122		case 'm':
123			lfmode = argtoi('m', "mode", optarg, 8);
124			if (lfmode &~ 07777)
125				errexit("bad mode to -m: %o", lfmode);
126			printf("** lost+found creation mode %o\n", lfmode);
127			break;
128
129		case 'n':
130			nflag++;
131			yflag = 0;
132			break;
133
134		case 'p':
135			preen++;
136			break;
137
138		case 'P':
139			/* Progress meter not implemented. */
140			break;
141
142		case 'q':		/* Quiet not implemented */
143			break;
144
145#ifndef SMALL
146		case 'U':
147			Uflag++;
148			break;
149#endif
150
151		case 'y':
152			yflag++;
153			nflag = 0;
154			break;
155
156		default:
157			usage();
158		}
159	}
160
161	argc -= optind;
162	argv += optind;
163
164	if (!argc)
165		usage();
166
167	if (signal(SIGINT, SIG_IGN) != SIG_IGN)
168		(void)signal(SIGINT, catch);
169	if (preen)
170		(void)signal(SIGQUIT, catchquit);
171
172	while (argc-- > 0) {
173		int nret = checkfilesys(blockcheck(*argv++), 0, 0L, 0);
174		if (ret < nret)
175			ret = nret;
176	}
177
178	return returntosingle ? FSCK_EXIT_UNRESOLVED : ret;
179}
180
181static int
182argtoi(int flag, const char *req, const char *str, int base)
183{
184	char *cp;
185	int ret;
186
187	ret = (int)strtol(str, &cp, base);
188	if (cp == str || *cp)
189		errexit("-%c flag requires a %s", flag, req);
190	return (ret);
191}
192
193/*
194 * Check the specified filesystem.
195 */
196/* ARGSUSED */
197static int
198checkfilesys(const char *filesys, char *mntpt, long auxdata, int child)
199{
200	daddr_t n_bfree;
201	struct dups *dp;
202	struct zlncnt *zlnp;
203	int i;
204
205	if (preen && child)
206		(void)signal(SIGQUIT, voidquit);
207	setcdevname(filesys, preen);
208	if (debug && preen)
209		pwarn("starting\n");
210	switch (setup(filesys)) {
211	case 0:
212		if (preen)
213			pfatal("CAN'T CHECK FILE SYSTEM.");
214	case -1:
215		return FSCK_EXIT_OK;
216	}
217	/*
218	 * 1: scan inodes tallying blocks used
219	 */
220	if (preen == 0) {
221		if (sblock.e2fs.e2fs_rev > E2FS_REV0) {
222			printf("** Last Mounted on %s\n",
223			    sblock.e2fs.e2fs_fsmnt);
224		}
225		if (hotroot())
226			printf("** Root file system\n");
227		printf("** Phase 1 - Check Blocks and Sizes\n");
228	}
229	pass1();
230
231	/*
232	 * 1b: locate first references to duplicates, if any
233	 */
234	if (duplist) {
235		if (preen)
236			pfatal("INTERNAL ERROR: dups with -p");
237		printf("** Phase 1b - Rescan For More DUPS\n");
238		pass1b();
239	}
240
241	/*
242	 * 2: traverse directories from root to mark all connected directories
243	 */
244	if (preen == 0)
245		printf("** Phase 2 - Check Pathnames\n");
246	pass2();
247
248	/*
249	 * 3: scan inodes looking for disconnected directories
250	 */
251	if (preen == 0)
252		printf("** Phase 3 - Check Connectivity\n");
253	pass3();
254
255	/*
256	 * 4: scan inodes looking for disconnected files; check reference counts
257	 */
258	if (preen == 0)
259		printf("** Phase 4 - Check Reference Counts\n");
260	pass4();
261
262	/*
263	 * 5: check and repair resource counts in cylinder groups
264	 */
265	if (preen == 0)
266		printf("** Phase 5 - Check Cyl groups\n");
267	pass5();
268
269	/*
270	 * print out summary statistics
271	 */
272	n_bfree = sblock.e2fs.e2fs_fbcount;
273
274	pwarn("%lld files, %lld used, %lld free\n",
275	    (long long)n_files, (long long)n_blks, (long long)n_bfree);
276	if (debug &&
277		/* 9 reserved and unused inodes in FS */
278	    (n_files -= maxino - 9 - sblock.e2fs.e2fs_ficount))
279		printf("%lld files missing\n", (long long)n_files);
280	if (debug) {
281		for (i = 0; i < sblock.e2fs_ncg; i++)
282			n_blks +=  cgoverhead(i);
283		n_blks += sblock.e2fs.e2fs_first_dblock;
284		if (n_blks -= maxfsblock - n_bfree)
285			printf("%lld blocks missing\n", (long long)n_blks);
286		if (duplist != NULL) {
287			printf("The following duplicate blocks remain:");
288			for (dp = duplist; dp; dp = dp->next)
289				printf(" %lld,", (long long)dp->dup);
290			printf("\n");
291		}
292		if (zlnhead != NULL) {
293			printf("The following zero link count inodes remain:");
294			for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
295				printf(" %llu,",
296				    (unsigned long long)zlnp->zlncnt);
297			printf("\n");
298		}
299	}
300	zlnhead = (struct zlncnt *)0;
301	duplist = (struct dups *)0;
302	muldup = (struct dups *)0;
303	inocleanup();
304	if (fsmodified) {
305		time_t t;
306		(void)time(&t);
307		sblock.e2fs.e2fs_wtime = t;
308		sblock.e2fs.e2fs_lastfsck = t;
309		sbdirty();
310	}
311	ckfini(1);
312	free(blockmap);
313	free(statemap);
314	free((char *)lncntp);
315	if (!fsmodified)
316		return FSCK_EXIT_OK;
317	if (!preen)
318		printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
319	if (rerun)
320		printf("\n***** PLEASE RERUN FSCK *****\n");
321	if (hotroot()) {
322		struct statvfs stfs_buf;
323		/*
324		 * We modified the root.  Do a mount update on
325		 * it, unless it is read-write, so we can continue.
326		 */
327		if (statvfs("/", &stfs_buf) == 0) {
328			long flags = stfs_buf.f_flag;
329			struct ufs_args args;
330
331			if (flags & MNT_RDONLY) {
332				args.fspec = 0;
333				flags |= MNT_UPDATE | MNT_RELOAD;
334				if (mount(MOUNT_EXT2FS, "/", flags,
335				    &args, sizeof args) == 0)
336					return FSCK_EXIT_OK;
337			}
338		}
339		if (!preen)
340			printf("\n***** REBOOT NOW *****\n");
341		sync();
342		return FSCK_EXIT_ROOT_CHANGED;
343	}
344	return FSCK_EXIT_OK;
345}
346
347static void
348usage(void)
349{
350
351	(void) fprintf(stderr,
352	    "usage: %s [-dfnpUy] [-b block] [-c level] [-m mode] filesystem ...\n",
353	    getprogname());
354	exit(FSCK_EXIT_USAGE);
355}
356
357