main.c revision 1.1 
1/*	$NetBSD: main.c,v 1.1 1997/06/11 11:21:50 bouyer Exp $	*/
2
3/*
4 * Copyright (c) 1997 Manuel Bouyer.
5 * Copyright (c) 1980, 1986, 1993
6 *	The Regents of the University of California.  All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by the University of
19 *	California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37#ifndef lint
38static char copyright[] =
39"@(#) Copyright (c) 1980, 1986, 1993\n\
40	The Regents of the University of California.  All rights reserved.\n";
41#endif /* not lint */
42
43#ifndef lint
44#if 0
45static char sccsid[] = "@(#)main.c	8.2 (Berkeley) 1/23/94";
46#else
47static char rcsid[] = "$NetBSD: main.c,v 1.1 1997/06/11 11:21:50 bouyer Exp $";
48#endif
49#endif /* not lint */
50
51#include <sys/param.h>
52#include <sys/time.h>
53#include <sys/mount.h>
54#include <ufs/ext2fs/ext2fs_dinode.h>
55#include <ufs/ext2fs/ext2fs.h>
56#include <fstab.h>
57#include <stdlib.h>
58#include <string.h>
59#include <ctype.h>
60#include <stdio.h>
61#include <unistd.h>
62
63#include "fsck.h"
64#include "extern.h"
65#include "fsutil.h"
66
67int	returntosingle;
68
69int	main __P((int, char *[]));
70
71static int	argtoi __P((int, char *, char *, int));
72static int	checkfilesys __P((char *, char *, long, int));
73static int	docheck __P((struct fstab *));
74static  void usage __P((void));
75
76
77int
78main(argc, argv)
79	int	argc;
80	char	*argv[];
81{
82	int ch;
83	int ret = 0;
84	extern char *optarg;
85	extern int optind;
86
87	sync();
88	skipclean = 1;
89	while ((ch = getopt(argc, argv, "b:c:dfm:npy")) != EOF) {
90		switch (ch) {
91		case 'b':
92			skipclean = 0;
93			bflag = argtoi('b', "number", optarg, 10);
94			printf("Alternate super block location: %d\n", bflag);
95			break;
96
97		case 'd':
98			debug++;
99			break;
100
101		case 'f':
102			skipclean = 0;
103			break;
104
105		case 'm':
106			lfmode = argtoi('m', "mode", optarg, 8);
107			if (lfmode &~ 07777)
108				errexit("bad mode to -m: %o\n", lfmode);
109			printf("** lost+found creation mode %o\n", lfmode);
110			break;
111
112		case 'n':
113			nflag++;
114			yflag = 0;
115			break;
116
117		case 'p':
118			preen++;
119			break;
120
121		case 'y':
122			yflag++;
123			nflag = 0;
124			break;
125
126		default:
127			usage();
128		}
129	}
130
131	argc -= optind;
132	argv += optind;
133
134	if (!argc)
135		usage();
136
137	if (signal(SIGINT, SIG_IGN) != SIG_IGN)
138		(void)signal(SIGINT, catch);
139	if (preen)
140		(void)signal(SIGQUIT, catchquit);
141
142	while (argc-- > 0)
143		(void)checkfilesys(blockcheck(*argv++), 0, 0L, 0);
144
145	if (returntosingle)
146		ret = 2;
147
148	exit(ret);
149}
150
151static int
152argtoi(flag, req, str, base)
153	int flag;
154	char *req, *str;
155	int base;
156{
157	char *cp;
158	int ret;
159
160	ret = (int)strtol(str, &cp, base);
161	if (cp == str || *cp)
162		errexit("-%c flag requires a %s\n", flag, req);
163	return (ret);
164}
165
166/*
167 * Determine whether a filesystem should be checked.
168 */
169static int
170docheck(fsp)
171	register struct fstab *fsp;
172{
173
174	if ( strcmp(fsp->fs_vfstype, "ext2fs") ||
175	    (strcmp(fsp->fs_type, FSTAB_RW) &&
176	     strcmp(fsp->fs_type, FSTAB_RO)) ||
177	    fsp->fs_passno == 0)
178		return (0);
179	return (1);
180}
181
182/*
183 * Check the specified filesystem.
184 */
185/* ARGSUSED */
186static int
187checkfilesys(filesys, mntpt, auxdata, child)
188	char *filesys, *mntpt;
189	long auxdata;
190	int child;
191{
192	daddr_t n_bfree;
193	struct dups *dp;
194	struct zlncnt *zlnp;
195	int cylno;
196
197	if (preen && child)
198		(void)signal(SIGQUIT, voidquit);
199	setcdevname(filesys, preen);
200	if (debug && preen)
201		pwarn("starting\n");
202	switch (setup(filesys)) {
203	case 0:
204		if (preen)
205			pfatal("CAN'T CHECK FILE SYSTEM.");
206	case -1:
207		return (0);
208	}
209	/*
210	 * 1: scan inodes tallying blocks used
211	 */
212	if (preen == 0) {
213		if (hotroot())
214			printf("** Root file system\n");
215		printf("** Phase 1 - Check Blocks and Sizes\n");
216	}
217	pass1();
218
219	/*
220	 * 1b: locate first references to duplicates, if any
221	 */
222	if (duplist) {
223		if (preen)
224			pfatal("INTERNAL ERROR: dups with -p");
225		printf("** Phase 1b - Rescan For More DUPS\n");
226		pass1b();
227	}
228
229	/*
230	 * 2: traverse directories from root to mark all connected directories
231	 */
232	if (preen == 0)
233		printf("** Phase 2 - Check Pathnames\n");
234	pass2();
235
236	/*
237	 * 3: scan inodes looking for disconnected directories
238	 */
239	if (preen == 0)
240		printf("** Phase 3 - Check Connectivity\n");
241	pass3();
242
243	/*
244	 * 4: scan inodes looking for disconnected files; check reference counts
245	 */
246	if (preen == 0)
247		printf("** Phase 4 - Check Reference Counts\n");
248	pass4();
249
250	/*
251	 * 5: check and repair resource counts in cylinder groups
252	 */
253	if (preen == 0)
254		printf("** Phase 5 - Check Cyl groups\n");
255	pass5();
256
257	/*
258	 * print out summary statistics
259	 */
260	n_bfree = sblock.e2fs.e2fs_fbcount;
261
262	pwarn("%d files, %d used, %d free\n",
263	    n_files, n_blks, n_bfree);
264	if (debug &&
265		/* 9 reserved and unused inodes in FS */
266	    (n_files -= maxino - 9 - sblock.e2fs.e2fs_ficount))
267		printf("%d files missing\n", n_files);
268	if (debug) {
269		n_blks += sblock.e2fs_ncg * cgoverhead;
270		n_blks += sblock.e2fs.e2fs_first_dblock;
271		if (n_blks -= maxfsblock - n_bfree)
272			printf("%d blocks missing\n", n_blks);
273		if (duplist != NULL) {
274			printf("The following duplicate blocks remain:");
275			for (dp = duplist; dp; dp = dp->next)
276				printf(" %d,", dp->dup);
277			printf("\n");
278		}
279		if (zlnhead != NULL) {
280			printf("The following zero link count inodes remain:");
281			for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
282				printf(" %u,", zlnp->zlncnt);
283			printf("\n");
284		}
285	}
286	zlnhead = (struct zlncnt *)0;
287	duplist = (struct dups *)0;
288	muldup = (struct dups *)0;
289	inocleanup();
290	if (fsmodified) {
291		time_t t;
292		(void)time(&t);
293		sblock.e2fs.e2fs_wtime = t;
294		sblock.e2fs.e2fs_lastfsck = t;
295		sbdirty();
296	}
297	ckfini(1);
298	free(blockmap);
299	free(statemap);
300	free((char *)lncntp);
301	if (!fsmodified)
302		return (0);
303	if (!preen)
304		printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
305	if (rerun)
306		printf("\n***** PLEASE RERUN FSCK *****\n");
307	if (hotroot()) {
308		struct statfs stfs_buf;
309		/*
310		 * We modified the root.  Do a mount update on
311		 * it, unless it is read-write, so we can continue.
312		 */
313		if (statfs("/", &stfs_buf) == 0) {
314			long flags = stfs_buf.f_flags;
315			struct ufs_args args;
316			int ret;
317
318			if (flags & MNT_RDONLY) {
319				args.fspec = 0;
320				args.export.ex_flags = 0;
321				args.export.ex_root = 0;
322				flags |= MNT_UPDATE | MNT_RELOAD;
323				ret = mount(MOUNT_EXT2FS, "/", flags, &args);
324				if (ret == 0)
325					return(0);
326			}
327		}
328		if (!preen)
329			printf("\n***** REBOOT NOW *****\n");
330		sync();
331		return (4);
332	}
333	return (0);
334}
335
336static void
337usage()
338{
339	extern char *__progname;
340
341	(void) fprintf(stderr,
342	    "Usage: %s [-dfnpy] [-b block] [-c level] [-m mode] filesystem ...\n",
343	    __progname);
344	exit(1);
345}
346
347