main.c revision 34266 
1/*
2 * Copyright (c) 1980, 1986, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35static const char copyright[] =
36"@(#) Copyright (c) 1980, 1986, 1993\n\
37	The Regents of the University of California.  All rights reserved.\n";
38#endif /* not lint */
39
40#ifndef lint
41#if 0
42static char sccsid[] = "@(#)main.c	8.6 (Berkeley) 5/14/95";
43#endif
44static const char rcsid[] =
45	"$Id: main.c,v 1.12 1997/12/20 22:24:32 bde Exp $";
46#endif /* not lint */
47
48#include <sys/param.h>
49#include <sys/time.h>
50#include <sys/mount.h>
51
52#include <ufs/ufs/dinode.h>
53#include <ufs/ufs/ufsmount.h>
54#include <ufs/ffs/fs.h>
55
56#include <ctype.h>
57#include <err.h>
58#include <fstab.h>
59#include <string.h>
60
61#include "fsck.h"
62
63int	returntosingle;
64
65static int argtoi __P((int flag, char *req, char *str, int base));
66static int docheck __P((struct fstab *fsp));
67static int checkfilesys __P((char *filesys, char *mntpt, long auxdata,
68		int child));
69int main __P((int argc, char *argv[]));
70
71int
72main(argc, argv)
73	int	argc;
74	char	*argv[];
75{
76	int ch;
77	int ret, maxrun = 0;
78
79	sync();
80	while ((ch = getopt(argc, argv, "dfpnNyYb:c:l:m:")) != -1) {
81		switch (ch) {
82		case 'p':
83			preen++;
84			break;
85
86		case 'b':
87			bflag = argtoi('b', "number", optarg, 10);
88			printf("Alternate super block location: %d\n", bflag);
89			break;
90
91		case 'c':
92			cvtlevel = argtoi('c', "conversion level", optarg, 10);
93			break;
94
95		case 'd':
96			debug++;
97			break;
98
99		case 'f':
100			fflag++;
101			break;
102
103		case 'l':
104			maxrun = argtoi('l', "number", optarg, 10);
105			break;
106
107		case 'm':
108			lfmode = argtoi('m', "mode", optarg, 8);
109			if (lfmode &~ 07777)
110				errx(EEXIT, "bad mode to -m: %o", lfmode);
111			printf("** lost+found creation mode %o\n", lfmode);
112			break;
113
114		case 'n':
115		case 'N':
116			nflag++;
117			yflag = 0;
118			break;
119
120		case 'y':
121		case 'Y':
122			yflag++;
123			nflag = 0;
124			break;
125
126		default:
127			errx(EEXIT, "%c option?", ch);
128		}
129	}
130	argc -= optind;
131	argv += optind;
132	if (signal(SIGINT, SIG_IGN) != SIG_IGN)
133		(void)signal(SIGINT, catch);
134	if (preen)
135		(void)signal(SIGQUIT, catchquit);
136	if (argc) {
137		while (argc-- > 0)
138			(void)checkfilesys(blockcheck(*argv++), 0, 0L, 0);
139		exit(0);
140	}
141	ret = checkfstab(preen, maxrun, docheck, checkfilesys);
142	if (returntosingle)
143		exit(2);
144	exit(ret);
145}
146
147static int
148argtoi(flag, req, str, base)
149	int flag;
150	char *req, *str;
151	int base;
152{
153	char *cp;
154	int ret;
155
156	ret = (int)strtol(str, &cp, base);
157	if (cp == str || *cp)
158		errx(EEXIT, "-%c flag requires a %s", flag, req);
159	return (ret);
160}
161
162/*
163 * Determine whether a filesystem should be checked.
164 */
165static int
166docheck(fsp)
167	register struct fstab *fsp;
168{
169
170	if (strcmp(fsp->fs_vfstype, "ufs") ||
171	    (strcmp(fsp->fs_type, FSTAB_RW) &&
172	     strcmp(fsp->fs_type, FSTAB_RO)) ||
173	    fsp->fs_passno == 0)
174		return (0);
175	return (1);
176}
177
178/*
179 * Check the specified filesystem.
180 */
181/* ARGSUSED */
182static int
183checkfilesys(filesys, mntpt, auxdata, child)
184	char *filesys, *mntpt;
185	long auxdata;
186	int child;
187{
188	ufs_daddr_t n_ffree, n_bfree;
189	struct dups *dp;
190	struct zlncnt *zlnp;
191	int cylno, flags;
192
193	if (preen && child)
194		(void)signal(SIGQUIT, voidquit);
195	cdevname = filesys;
196	if (debug && preen)
197		pwarn("starting\n");
198	switch (setup(filesys)) {
199	case 0:
200		if (preen)
201			pfatal("CAN'T CHECK FILE SYSTEM.");
202		return (0);
203	case -1:
204		pwarn("clean, %ld free ", sblock.fs_cstotal.cs_nffree +
205		    sblock.fs_frag * sblock.fs_cstotal.cs_nbfree);
206		printf("(%d frags, %d blocks, %.1f%% fragmentation)\n",
207		    sblock.fs_cstotal.cs_nffree, sblock.fs_cstotal.cs_nbfree,
208		    sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize);
209		return (0);
210	}
211
212	/*
213	 * Cleared if any questions answered no. Used to decide if
214	 * the superblock should be marked clean.
215	 */
216	resolved = 1;
217	/*
218	 * 1: scan inodes tallying blocks used
219	 */
220	if (preen == 0) {
221		printf("** Last Mounted on %s\n", sblock.fs_fsmnt);
222		if (hotroot)
223			printf("** Root file system\n");
224		printf("** Phase 1 - Check Blocks and Sizes\n");
225	}
226	pass1();
227
228	/*
229	 * 1b: locate first references to duplicates, if any
230	 */
231	if (duplist) {
232		if (preen || usedsoftdep)
233			pfatal("INTERNAL ERROR: dups with -p");
234		printf("** Phase 1b - Rescan For More DUPS\n");
235		pass1b();
236	}
237
238	/*
239	 * 2: traverse directories from root to mark all connected directories
240	 */
241	if (preen == 0)
242		printf("** Phase 2 - Check Pathnames\n");
243	pass2();
244
245	/*
246	 * 3: scan inodes looking for disconnected directories
247	 */
248	if (preen == 0)
249		printf("** Phase 3 - Check Connectivity\n");
250	pass3();
251
252	/*
253	 * 4: scan inodes looking for disconnected files; check reference counts
254	 */
255	if (preen == 0)
256		printf("** Phase 4 - Check Reference Counts\n");
257	pass4();
258
259	/*
260	 * 5: check and repair resource counts in cylinder groups
261	 */
262	if (preen == 0)
263		printf("** Phase 5 - Check Cyl groups\n");
264	pass5();
265
266	/*
267	 * print out summary statistics
268	 */
269	n_ffree = sblock.fs_cstotal.cs_nffree;
270	n_bfree = sblock.fs_cstotal.cs_nbfree;
271	pwarn("%ld files, %ld used, %ld free ",
272	    n_files, n_blks, n_ffree + sblock.fs_frag * n_bfree);
273	printf("(%d frags, %d blocks, %.1f%% fragmentation)\n",
274	    n_ffree, n_bfree, n_ffree * 100.0 / sblock.fs_dsize);
275	if (debug &&
276	    (n_files -= maxino - ROOTINO - sblock.fs_cstotal.cs_nifree))
277		printf("%d files missing\n", n_files);
278	if (debug) {
279		n_blks += sblock.fs_ncg *
280			(cgdmin(&sblock, 0) - cgsblock(&sblock, 0));
281		n_blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0);
282		n_blks += howmany(sblock.fs_cssize, sblock.fs_fsize);
283		if (n_blks -= maxfsblock - (n_ffree + sblock.fs_frag * n_bfree))
284			printf("%d blocks missing\n", n_blks);
285		if (duplist != NULL) {
286			printf("The following duplicate blocks remain:");
287			for (dp = duplist; dp; dp = dp->next)
288				printf(" %d,", 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(" %u,", 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		(void)time(&sblock.fs_time);
304		sbdirty();
305	}
306	if (cvtlevel && sblk.b_dirty) {
307		/*
308		 * Write out the duplicate super blocks
309		 */
310		for (cylno = 0; cylno < sblock.fs_ncg; cylno++)
311			bwrite(fswritefd, (char *)&sblock,
312			    fsbtodb(&sblock, cgsblock(&sblock, cylno)), SBSIZE);
313	}
314	if (rerun)
315		resolved = 0;
316	flags = 0;
317	if (hotroot) {
318		struct statfs stfs_buf;
319		/*
320		 * Check to see if root is mounted read-write.
321		 */
322		if (statfs("/", &stfs_buf) == 0)
323			flags = stfs_buf.f_flags;
324		if ((flags & MNT_RDONLY) == 0)
325			resolved = 0;
326	}
327	ckfini(resolved);
328	free(blockmap);
329	free(statemap);
330	free((char *)lncntp);
331	if (!fsmodified)
332		return (0);
333	if (!preen)
334		printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
335	if (rerun)
336		printf("\n***** PLEASE RERUN FSCK *****\n");
337	if (hotroot) {
338		struct ufs_args args;
339		int ret;
340		/*
341		 * We modified the root.  Do a mount update on
342		 * it, unless it is read-write, so we can continue.
343		 */
344		if (flags & MNT_RDONLY) {
345			args.fspec = 0;
346			args.export.ex_flags = 0;
347			args.export.ex_root = 0;
348			flags |= MNT_UPDATE | MNT_RELOAD;
349			ret = mount("ufs", "/", flags, &args);
350			if (ret == 0)
351				return (0);
352		}
353		if (!preen)
354			printf("\n***** REBOOT NOW *****\n");
355		sync();
356		return (4);
357	}
358	return (0);
359}
360