xref: /netbsd-src/sbin/fsck_ext2fs/main.c (revision b5677b36047b601b9addaaa494a58ceae82c2a6c)
1 /*	$NetBSD: main.c,v 1.32 2008/10/12 20:49:43 wiz 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\
64  The Regents of the University of California.  All rights reserved.");
65 #endif /* not lint */
66 
67 #ifndef lint
68 #if 0
69 static char sccsid[] = "@(#)main.c	8.2 (Berkeley) 1/23/94";
70 #else
71 __RCSID("$NetBSD: main.c,v 1.32 2008/10/12 20:49:43 wiz 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 
95 int	returntosingle = 0;
96 
97 
98 static int	argtoi(int, const char *, const char *, int);
99 static int	checkfilesys(const char *, char *, long, int);
100 static void	usage(void) __dead;
101 
102 int
103 main(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:npqUy")) != -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", 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 #ifndef SMALL
150 		case 'U':
151 			Uflag++;
152 			break;
153 #endif
154 
155 		case 'y':
156 			yflag++;
157 			nflag = 0;
158 			break;
159 
160 		default:
161 			usage();
162 		}
163 	}
164 
165 	argc -= optind;
166 	argv += optind;
167 
168 	if (!argc)
169 		usage();
170 
171 	if (signal(SIGINT, SIG_IGN) != SIG_IGN)
172 		(void)signal(SIGINT, catch);
173 	if (preen)
174 		(void)signal(SIGQUIT, catchquit);
175 
176 	while (argc-- > 0) {
177 		int nret = checkfilesys(blockcheck(*argv++), 0, 0L, 0);
178 		if (ret < nret)
179 			ret = nret;
180 	}
181 
182 	return returntosingle ? FSCK_EXIT_UNRESOLVED : ret;
183 }
184 
185 static int
186 argtoi(int flag, const char *req, const char *str, int base)
187 {
188 	char *cp;
189 	int ret;
190 
191 	ret = (int)strtol(str, &cp, base);
192 	if (cp == str || *cp)
193 		errexit("-%c flag requires a %s", flag, req);
194 	return (ret);
195 }
196 
197 /*
198  * Check the specified filesystem.
199  */
200 /* ARGSUSED */
201 static int
202 checkfilesys(const char *filesys, char *mntpt, long auxdata, int child)
203 {
204 	daddr_t n_bfree;
205 	struct dups *dp;
206 	struct zlncnt *zlnp;
207 	int i;
208 
209 	if (preen && child)
210 		(void)signal(SIGQUIT, voidquit);
211 	setcdevname(filesys, preen);
212 	if (debug && preen)
213 		pwarn("starting\n");
214 	switch (setup(filesys)) {
215 	case 0:
216 		if (preen)
217 			pfatal("CAN'T CHECK FILE SYSTEM.");
218 	case -1:
219 		return FSCK_EXIT_OK;
220 	}
221 	/*
222 	 * 1: scan inodes tallying blocks used
223 	 */
224 	if (preen == 0) {
225 		if (sblock.e2fs.e2fs_rev > E2FS_REV0) {
226 			printf("** Last Mounted on %s\n",
227 			    sblock.e2fs.e2fs_fsmnt);
228 		}
229 		if (hotroot())
230 			printf("** Root file system\n");
231 		printf("** Phase 1 - Check Blocks and Sizes\n");
232 	}
233 	pass1();
234 
235 	/*
236 	 * 1b: locate first references to duplicates, if any
237 	 */
238 	if (duplist) {
239 		if (preen)
240 			pfatal("INTERNAL ERROR: dups with -p");
241 		printf("** Phase 1b - Rescan For More DUPS\n");
242 		pass1b();
243 	}
244 
245 	/*
246 	 * 2: traverse directories from root to mark all connected directories
247 	 */
248 	if (preen == 0)
249 		printf("** Phase 2 - Check Pathnames\n");
250 	pass2();
251 
252 	/*
253 	 * 3: scan inodes looking for disconnected directories
254 	 */
255 	if (preen == 0)
256 		printf("** Phase 3 - Check Connectivity\n");
257 	pass3();
258 
259 	/*
260 	 * 4: scan inodes looking for disconnected files; check reference counts
261 	 */
262 	if (preen == 0)
263 		printf("** Phase 4 - Check Reference Counts\n");
264 	pass4();
265 
266 	/*
267 	 * 5: check and repair resource counts in cylinder groups
268 	 */
269 	if (preen == 0)
270 		printf("** Phase 5 - Check Cyl groups\n");
271 	pass5();
272 
273 	/*
274 	 * print out summary statistics
275 	 */
276 	n_bfree = sblock.e2fs.e2fs_fbcount;
277 
278 	pwarn("%lld files, %lld used, %lld free\n",
279 	    (long long)n_files, (long long)n_blks, (long long)n_bfree);
280 	if (debug &&
281 		/* 9 reserved and unused inodes in FS */
282 	    (n_files -= maxino - 9 - sblock.e2fs.e2fs_ficount))
283 		printf("%lld files missing\n", (long long)n_files);
284 	if (debug) {
285 		for (i = 0; i < sblock.e2fs_ncg; i++)
286 			n_blks +=  cgoverhead(i);
287 		n_blks += sblock.e2fs.e2fs_first_dblock;
288 		if (n_blks -= maxfsblock - n_bfree)
289 			printf("%lld blocks missing\n", (long long)n_blks);
290 		if (duplist != NULL) {
291 			printf("The following duplicate blocks remain:");
292 			for (dp = duplist; dp; dp = dp->next)
293 				printf(" %lld,", (long long)dp->dup);
294 			printf("\n");
295 		}
296 		if (zlnhead != NULL) {
297 			printf("The following zero link count inodes remain:");
298 			for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
299 				printf(" %llu,",
300 				    (unsigned long long)zlnp->zlncnt);
301 			printf("\n");
302 		}
303 	}
304 	zlnhead = (struct zlncnt *)0;
305 	duplist = (struct dups *)0;
306 	muldup = (struct dups *)0;
307 	inocleanup();
308 	if (fsmodified) {
309 		time_t t;
310 		(void)time(&t);
311 		sblock.e2fs.e2fs_wtime = t;
312 		sblock.e2fs.e2fs_lastfsck = t;
313 		sbdirty();
314 	}
315 	ckfini(1);
316 	free(blockmap);
317 	free(statemap);
318 	free((char *)lncntp);
319 	if (!fsmodified)
320 		return FSCK_EXIT_OK;
321 	if (!preen)
322 		printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
323 	if (rerun)
324 		printf("\n***** PLEASE RERUN FSCK *****\n");
325 	if (hotroot()) {
326 		struct statvfs stfs_buf;
327 		/*
328 		 * We modified the root.  Do a mount update on
329 		 * it, unless it is read-write, so we can continue.
330 		 */
331 		if (statvfs("/", &stfs_buf) == 0) {
332 			long flags = stfs_buf.f_flag;
333 			struct ufs_args args;
334 
335 			if (flags & MNT_RDONLY) {
336 				args.fspec = 0;
337 				flags |= MNT_UPDATE | MNT_RELOAD;
338 				if (mount(MOUNT_EXT2FS, "/", flags,
339 				    &args, sizeof args) == 0)
340 					return FSCK_EXIT_OK;
341 			}
342 		}
343 		if (!preen)
344 			printf("\n***** REBOOT NOW *****\n");
345 		sync();
346 		return FSCK_EXIT_ROOT_CHANGED;
347 	}
348 	return FSCK_EXIT_OK;
349 }
350 
351 static void
352 usage(void)
353 {
354 
355 	(void) fprintf(stderr,
356 	    "usage: %s [-dfnpUy] [-b block] [-c level] [-m mode] filesystem ...\n",
357 	    getprogname());
358 	exit(FSCK_EXIT_USAGE);
359 }
360 
361