main.c revision 8871 
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
41static const char sccsid[] = "@(#)main.c	8.2 (Berkeley) 1/23/94";
42#endif /* not lint */
43
44#include <sys/param.h>
45#include <sys/time.h>
46#include <sys/proc.h>
47#include <sys/mount.h>
48#include <ufs/ufs/dinode.h>
49#include <ufs/ffs/fs.h>
50#include <fstab.h>
51#include <stdlib.h>
52#include <unistd.h>
53#include <string.h>
54#include <ctype.h>
55#include <stdio.h>
56#include "fsck.h"
57static int	argtoi __P((int flag, char *req, char *str, int base));
58static int	docheck __P((struct fstab *fsp));
59static int	checkfilesys __P((char *filesys, char *mntpt, long auxdata,
60				  int child));
61
62int
63main(argc, argv)
64	int	argc;
65	char	*argv[];
66{
67	int ch;
68	int ret, maxrun = 0;
69	extern char *optarg;
70	extern int optind;
71
72	sync();
73	while ((ch = getopt(argc, argv, "dfpnNyYb:c:l:m:")) != EOF) {
74		switch (ch) {
75		case 'p':
76			preen++;
77			break;
78
79		case 'b':
80			bflag = argtoi('b', "number", optarg, 10);
81			printf("Alternate super block location: %d\n", bflag);
82			break;
83
84		case 'c':
85			cvtlevel = argtoi('c', "conversion level", optarg, 10);
86			break;
87
88		case 'd':
89			debug++;
90			break;
91
92		case 'f':
93			fflag++;
94			break;
95
96		case 'l':
97			maxrun = argtoi('l', "number", optarg, 10);
98			break;
99
100		case 'm':
101			lfmode = argtoi('m', "mode", optarg, 8);
102			if (lfmode &~ 07777)
103				errexit("bad mode to -m: %o\n", lfmode);
104			printf("** lost+found creation mode %o\n", lfmode);
105			break;
106
107		case 'n':
108		case 'N':
109			nflag++;
110			yflag = 0;
111			break;
112
113		case 'y':
114		case 'Y':
115			yflag++;
116			nflag = 0;
117			break;
118
119		default:
120			errexit("%c option?\n", ch);
121		}
122	}
123	argc -= optind;
124	argv += optind;
125	if (signal(SIGINT, SIG_IGN) != SIG_IGN)
126		(void)signal(SIGINT, catch);
127	if (preen)
128		(void)signal(SIGQUIT, catchquit);
129	if (argc) {
130		while (argc-- > 0)
131			(void)checkfilesys(blockcheck(*argv++), 0, 0L, 0);
132		exit(0);
133	}
134	ret = checkfstab(preen, maxrun, docheck, checkfilesys);
135	if (returntosingle)
136		exit(2);
137	exit(ret);
138}
139
140int
141argtoi(flag, req, str, base)
142	int flag;
143	char *req, *str;
144	int base;
145{
146	char *cp;
147	int ret;
148
149	ret = (int)strtol(str, &cp, base);
150	if (cp == str || *cp)
151		errexit("-%c flag requires a %s\n", flag, req);
152	return (ret);
153}
154
155/*
156 * Determine whether a filesystem should be checked.
157 */
158int
159docheck(fsp)
160	register struct fstab *fsp;
161{
162
163	if (strcmp(fsp->fs_vfstype, "ufs") ||
164	    (strcmp(fsp->fs_type, FSTAB_RW) &&
165	     strcmp(fsp->fs_type, FSTAB_RO)) ||
166	    fsp->fs_passno == 0)
167		return (0);
168	return (1);
169}
170
171/*
172 * Check the specified filesystem.
173 */
174/* ARGSUSED */
175int
176checkfilesys(filesys, mntpt, auxdata, child)
177	char *filesys, *mntpt;
178	long auxdata;
179	int child;
180{
181	daddr_t n_ffree, n_bfree;
182	struct dups *dp;
183	struct zlncnt *zlnp;
184	int cylno;
185
186	if (preen && child)
187		(void)signal(SIGQUIT, voidquit);
188	cdevname = filesys;
189	if (debug && preen)
190		pwarn("starting\n");
191	if (setup(filesys) == 0) {
192		if (preen)
193			pfatal("CAN'T CHECK FILE SYSTEM.");
194		return (0);
195	}
196
197	if (preen && sblock.fs_clean && !fflag) {
198		pwarn("clean, %ld free ", sblock.fs_cstotal.cs_nffree +
199			sblock.fs_frag * sblock.fs_cstotal.cs_nbfree);
200		printf("(%ld frags, %ld blocks, %.1f%% fragmentation)\n",
201			sblock.fs_cstotal.cs_nffree,
202			sblock.fs_cstotal.cs_nbfree,
203			(float)(sblock.fs_cstotal.cs_nffree * 100) /
204			sblock.fs_dsize);
205		return(0);
206	}
207
208	/*
209	 * 1: scan inodes tallying blocks used
210	 */
211	if (preen == 0) {
212		printf("** Last Mounted on %s\n", sblock.fs_fsmnt);
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_ffree = sblock.fs_cstotal.cs_nffree;
261	n_bfree = sblock.fs_cstotal.cs_nbfree;
262	pwarn("%ld files, %ld used, %ld free ",
263	    n_files, n_blks, n_ffree + sblock.fs_frag * n_bfree);
264	printf("(%ld frags, %ld blocks, %ld.%ld%% fragmentation)\n",
265	    n_ffree, n_bfree, (n_ffree * 100) / sblock.fs_dsize,
266	    ((n_ffree * 1000 + sblock.fs_dsize / 2) / sblock.fs_dsize) % 10);
267	if (debug &&
268	    (n_files -= maxino - ROOTINO - sblock.fs_cstotal.cs_nifree))
269		printf("%ld files missing\n", n_files);
270	if (debug) {
271		n_blks += sblock.fs_ncg *
272			(cgdmin(&sblock, 0) - cgsblock(&sblock, 0));
273		n_blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0);
274		n_blks += howmany(sblock.fs_cssize, sblock.fs_fsize);
275		if (n_blks -= maxfsblock - (n_ffree + sblock.fs_frag * n_bfree))
276			printf("%ld blocks missing\n", n_blks);
277		if (duplist != NULL) {
278			printf("The following duplicate blocks remain:");
279			for (dp = duplist; dp; dp = dp->next)
280				printf(" %ld,", dp->dup);
281			printf("\n");
282		}
283		if (zlnhead != NULL) {
284			printf("The following zero link count inodes remain:");
285			for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
286				printf(" %lu,", zlnp->zlncnt);
287			printf("\n");
288		}
289	}
290	zlnhead = (struct zlncnt *)0;
291	duplist = (struct dups *)0;
292	muldup = (struct dups *)0;
293	inocleanup();
294	if (fsmodified) {
295		(void)time(&sblock.fs_time);
296		sbdirty();
297	}
298	if (cvtlevel && sblk.b_dirty) {
299		/*
300		 * Write out the duplicate super blocks
301		 */
302		for (cylno = 0; cylno < sblock.fs_ncg; cylno++)
303			bwrite(fswritefd, (char *)&sblock,
304			    fsbtodb(&sblock, cgsblock(&sblock, cylno)), SBSIZE);
305	}
306	ckfini();
307	free(blockmap);
308	free(statemap);
309	free((char *)lncntp);
310	if (!fsmodified)
311		return (0);
312	if (!preen)
313		printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
314	if (hotroot) {
315		struct statfs stfs_buf;
316		/*
317		 * We modified the root.  Do a mount update on
318		 * it, unless it is read-write, so we can continue.
319		 */
320		if (statfs("/", &stfs_buf) == 0) {
321			long flags = stfs_buf.f_flags;
322			struct ufs_args args;
323			int ret;
324
325			if (flags & MNT_RDONLY) {
326				args.fspec = 0;
327				args.export.ex_flags = 0;
328				args.export.ex_root = 0;
329				flags |= MNT_UPDATE | MNT_RELOAD;
330				ret = mount(MOUNT_UFS, "/", flags, &args);
331				if (ret == 0)
332					return(0);
333			}
334		}
335		if (!preen)
336			printf("\n***** REBOOT NOW *****\n");
337		sync();
338		return (4);
339	}
340	return (0);
341}
342