main.c revision 2153 
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 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 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 <string.h>
53#include <ctype.h>
54#include <stdio.h>
55#include "fsck.h"
56
57void	catch(), catchquit(), voidquit();
58int	returntosingle;
59
60main(argc, argv)
61	int	argc;
62	char	*argv[];
63{
64	int ch;
65	int ret, maxrun = 0;
66	extern int docheck(), checkfilesys();
67	extern char *optarg, *blockcheck();
68	extern int optind;
69
70	sync();
71	while ((ch = getopt(argc, argv, "dfpnNyYb:c:l:m:")) != EOF) {
72		switch (ch) {
73		case 'p':
74			preen++;
75			break;
76
77		case 'b':
78			bflag = argtoi('b', "number", optarg, 10);
79			printf("Alternate super block location: %d\n", bflag);
80			break;
81
82		case 'c':
83			cvtlevel = argtoi('c', "conversion level", optarg, 10);
84			break;
85
86		case 'd':
87			debug++;
88			break;
89
90		case 'f':
91			fflag++;
92			break;
93
94		case 'l':
95			maxrun = argtoi('l', "number", optarg, 10);
96			break;
97
98		case 'm':
99			lfmode = argtoi('m', "mode", optarg, 8);
100			if (lfmode &~ 07777)
101				errexit("bad mode to -m: %o\n", lfmode);
102			printf("** lost+found creation mode %o\n", lfmode);
103			break;
104
105		case 'n':
106		case 'N':
107			nflag++;
108			yflag = 0;
109			break;
110
111		case 'y':
112		case 'Y':
113			yflag++;
114			nflag = 0;
115			break;
116
117		default:
118			errexit("%c option?\n", ch);
119		}
120	}
121	argc -= optind;
122	argv += optind;
123	if (signal(SIGINT, SIG_IGN) != SIG_IGN)
124		(void)signal(SIGINT, catch);
125	if (preen)
126		(void)signal(SIGQUIT, catchquit);
127	if (argc) {
128		while (argc-- > 0)
129			(void)checkfilesys(blockcheck(*argv++), 0, 0L, 0);
130		exit(0);
131	}
132	ret = checkfstab(preen, maxrun, docheck, checkfilesys);
133	if (returntosingle)
134		exit(2);
135	exit(ret);
136}
137
138argtoi(flag, req, str, base)
139	int flag;
140	char *req, *str;
141	int base;
142{
143	char *cp;
144	int ret;
145
146	ret = (int)strtol(str, &cp, base);
147	if (cp == str || *cp)
148		errexit("-%c flag requires a %s\n", flag, req);
149	return (ret);
150}
151
152/*
153 * Determine whether a filesystem should be checked.
154 */
155docheck(fsp)
156	register struct fstab *fsp;
157{
158
159	if (strcmp(fsp->fs_vfstype, "ufs") ||
160	    (strcmp(fsp->fs_type, FSTAB_RW) &&
161	     strcmp(fsp->fs_type, FSTAB_RO)) ||
162	    fsp->fs_passno == 0)
163		return (0);
164	return (1);
165}
166
167/*
168 * Check the specified filesystem.
169 */
170/* ARGSUSED */
171checkfilesys(filesys, mntpt, auxdata, child)
172	char *filesys, *mntpt;
173	long auxdata;
174{
175	daddr_t n_ffree, n_bfree;
176	struct dups *dp;
177	struct zlncnt *zlnp;
178	int cylno;
179
180	if (preen && child)
181		(void)signal(SIGQUIT, voidquit);
182	cdevname = filesys;
183	if (debug && preen)
184		pwarn("starting\n");
185	if (setup(filesys) == 0) {
186		if (preen)
187			pfatal("CAN'T CHECK FILE SYSTEM.");
188		return (0);
189	}
190
191	if (preen && sblock.fs_clean && !fflag) {
192		pwarn("clean, %ld free ", sblock.fs_cstotal.cs_nffree +
193			sblock.fs_frag * sblock.fs_cstotal.cs_nbfree);
194		printf("(%ld frags, %ld blocks, %.1f%% fragmentation)\n",
195			sblock.fs_cstotal.cs_nffree,
196			sblock.fs_cstotal.cs_nbfree,
197			(float)(sblock.fs_cstotal.cs_nffree * 100) /
198			sblock.fs_dsize);
199		return(0);
200	}
201
202	/*
203	 * 1: scan inodes tallying blocks used
204	 */
205	if (preen == 0) {
206		printf("** Last Mounted on %s\n", sblock.fs_fsmnt);
207		if (hotroot)
208			printf("** Root file system\n");
209		printf("** Phase 1 - Check Blocks and Sizes\n");
210	}
211	pass1();
212
213	/*
214	 * 1b: locate first references to duplicates, if any
215	 */
216	if (duplist) {
217		if (preen)
218			pfatal("INTERNAL ERROR: dups with -p");
219		printf("** Phase 1b - Rescan For More DUPS\n");
220		pass1b();
221	}
222
223	/*
224	 * 2: traverse directories from root to mark all connected directories
225	 */
226	if (preen == 0)
227		printf("** Phase 2 - Check Pathnames\n");
228	pass2();
229
230	/*
231	 * 3: scan inodes looking for disconnected directories
232	 */
233	if (preen == 0)
234		printf("** Phase 3 - Check Connectivity\n");
235	pass3();
236
237	/*
238	 * 4: scan inodes looking for disconnected files; check reference counts
239	 */
240	if (preen == 0)
241		printf("** Phase 4 - Check Reference Counts\n");
242	pass4();
243
244	/*
245	 * 5: check and repair resource counts in cylinder groups
246	 */
247	if (preen == 0)
248		printf("** Phase 5 - Check Cyl groups\n");
249	pass5();
250
251	/*
252	 * print out summary statistics
253	 */
254	n_ffree = sblock.fs_cstotal.cs_nffree;
255	n_bfree = sblock.fs_cstotal.cs_nbfree;
256	pwarn("%ld files, %ld used, %ld free ",
257	    n_files, n_blks, n_ffree + sblock.fs_frag * n_bfree);
258	printf("(%ld frags, %ld blocks, %d.%d%% fragmentation)\n",
259	    n_ffree, n_bfree, (n_ffree * 100) / sblock.fs_dsize,
260	    ((n_ffree * 1000 + sblock.fs_dsize / 2) / sblock.fs_dsize) % 10);
261	if (debug &&
262	    (n_files -= maxino - ROOTINO - sblock.fs_cstotal.cs_nifree))
263		printf("%ld files missing\n", n_files);
264	if (debug) {
265		n_blks += sblock.fs_ncg *
266			(cgdmin(&sblock, 0) - cgsblock(&sblock, 0));
267		n_blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0);
268		n_blks += howmany(sblock.fs_cssize, sblock.fs_fsize);
269		if (n_blks -= maxfsblock - (n_ffree + sblock.fs_frag * n_bfree))
270			printf("%ld blocks missing\n", n_blks);
271		if (duplist != NULL) {
272			printf("The following duplicate blocks remain:");
273			for (dp = duplist; dp; dp = dp->next)
274				printf(" %ld,", dp->dup);
275			printf("\n");
276		}
277		if (zlnhead != NULL) {
278			printf("The following zero link count inodes remain:");
279			for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
280				printf(" %lu,", zlnp->zlncnt);
281			printf("\n");
282		}
283	}
284	zlnhead = (struct zlncnt *)0;
285	duplist = (struct dups *)0;
286	muldup = (struct dups *)0;
287	inocleanup();
288	if (fsmodified || (!sblock.fs_clean && preen && !nflag && !hotroot)) {
289		sblock.fs_clean = 1;
290		(void)time(&sblock.fs_time);
291		sbdirty();
292	}
293	if (cvtlevel && sblk.b_dirty) {
294		/*
295		 * Write out the duplicate super blocks
296		 */
297		for (cylno = 0; cylno < sblock.fs_ncg; cylno++)
298			bwrite(fswritefd, (char *)&sblock,
299			    fsbtodb(&sblock, cgsblock(&sblock, cylno)), SBSIZE);
300	}
301	ckfini();
302	free(blockmap);
303	free(statemap);
304	free((char *)lncntp);
305	if (!fsmodified)
306		return (0);
307	if (!preen)
308		printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
309	if (hotroot) {
310		struct statfs stfs_buf;
311		/*
312		 * We modified the root.  Do a mount update on
313		 * it, unless it is read-write, so we can continue.
314		 */
315		if (statfs("/", &stfs_buf) == 0) {
316			long flags = stfs_buf.f_flags;
317			struct ufs_args args;
318			int ret;
319
320			if (flags & MNT_RDONLY) {
321				args.fspec = 0;
322				args.export.ex_flags = 0;
323				args.export.ex_root = 0;
324				flags |= MNT_UPDATE | MNT_RELOAD;
325				ret = mount(MOUNT_UFS, "/", flags, &args);
326				if (ret == 0)
327					return(0);
328			}
329		}
330		if (!preen)
331			printf("\n***** REBOOT NOW *****\n");
332		sync();
333		return (4);
334	}
335	return (0);
336}
337