main.c revision 31903 
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	8.6 (Berkeley) 5/14/95";
42#endif /* not lint */
43
44#include <sys/param.h>
45#include <sys/time.h>
46#include <sys/mount.h>
47
48#include <ufs/ufs/dinode.h>
49#include <ufs/ufs/ufsmount.h>
50#include <ufs/ffs/fs.h>
51
52#include <ctype.h>
53#include <err.h>
54#include <fstab.h>
55#include <string.h>
56
57#include "fsck.h"
58
59int	returntosingle;
60
61static int argtoi __P((int flag, char *req, char *str, int base));
62static int docheck __P((struct fstab *fsp));
63static int checkfilesys __P((char *filesys, char *mntpt, long auxdata,
64		int child));
65int main __P((int argc, char *argv[]));
66
67int
68main(argc, argv)
69	int	argc;
70	char	*argv[];
71{
72	int ch;
73	int ret, maxrun = 0;
74
75	sync();
76	while ((ch = getopt(argc, argv, "dfpnNyYb:c:l:m:")) != -1) {
77		switch (ch) {
78		case 'p':
79			preen++;
80			break;
81
82		case 'b':
83			bflag = argtoi('b', "number", optarg, 10);
84			printf("Alternate super block location: %d\n", bflag);
85			break;
86
87		case 'c':
88			cvtlevel = argtoi('c', "conversion level", optarg, 10);
89			break;
90
91		case 'd':
92			debug++;
93			break;
94
95		case 'f':
96			fflag++;
97			break;
98
99		case 'l':
100			maxrun = argtoi('l', "number", optarg, 10);
101			break;
102
103		case 'm':
104			lfmode = argtoi('m', "mode", optarg, 8);
105			if (lfmode &~ 07777)
106				errx(EEXIT, "bad mode to -m: %o", lfmode);
107			printf("** lost+found creation mode %o\n", lfmode);
108			break;
109
110		case 'n':
111		case 'N':
112			nflag++;
113			yflag = 0;
114			break;
115
116		case 'y':
117		case 'Y':
118			yflag++;
119			nflag = 0;
120			break;
121
122		default:
123			errx(EEXIT, "%c option?", ch);
124		}
125	}
126	argc -= optind;
127	argv += optind;
128	if (signal(SIGINT, SIG_IGN) != SIG_IGN)
129		(void)signal(SIGINT, catch);
130	if (preen)
131		(void)signal(SIGQUIT, catchquit);
132	if (argc) {
133		while (argc-- > 0)
134			(void)checkfilesys(blockcheck(*argv++), 0, 0L, 0);
135		exit(0);
136	}
137	ret = checkfstab(preen, maxrun, docheck, checkfilesys);
138	if (returntosingle)
139		exit(2);
140	exit(ret);
141}
142
143static int
144argtoi(flag, req, str, base)
145	int flag;
146	char *req, *str;
147	int base;
148{
149	char *cp;
150	int ret;
151
152	ret = (int)strtol(str, &cp, base);
153	if (cp == str || *cp)
154		errx(EEXIT, "-%c flag requires a %s", flag, req);
155	return (ret);
156}
157
158/*
159 * Determine whether a filesystem should be checked.
160 */
161static int
162docheck(fsp)
163	register struct fstab *fsp;
164{
165
166	if (strcmp(fsp->fs_vfstype, "ufs") ||
167	    (strcmp(fsp->fs_type, FSTAB_RW) &&
168	     strcmp(fsp->fs_type, FSTAB_RO)) ||
169	    fsp->fs_passno == 0)
170		return (0);
171	return (1);
172}
173
174/*
175 * Check the specified filesystem.
176 */
177/* ARGSUSED */
178static int
179checkfilesys(filesys, mntpt, auxdata, child)
180	char *filesys, *mntpt;
181	long auxdata;
182	int child;
183{
184	ufs_daddr_t n_ffree, n_bfree;
185	struct dups *dp;
186	struct zlncnt *zlnp;
187	int cylno, flags;
188
189	if (preen && child)
190		(void)signal(SIGQUIT, voidquit);
191	cdevname = filesys;
192	if (debug && preen)
193		pwarn("starting\n");
194	switch (setup(filesys)) {
195	case 0:
196		if (preen)
197			pfatal("CAN'T CHECK FILE SYSTEM.");
198		return (0);
199	case -1:
200		pwarn("clean, %ld free ", sblock.fs_cstotal.cs_nffree +
201			sblock.fs_frag * sblock.fs_cstotal.cs_nbfree);
202		printf("(%ld frags, %ld blocks, %.1f%% fragmentation)\n",
203			sblock.fs_cstotal.cs_nffree,
204			sblock.fs_cstotal.cs_nbfree,
205			(float)(sblock.fs_cstotal.cs_nffree * 100) /
206			sblock.fs_dsize);
207		return(0);
208	}
209
210	/*
211	 * 1: scan inodes tallying blocks used
212	 */
213	if (preen == 0) {
214		printf("** Last Mounted on %s\n", sblock.fs_fsmnt);
215		if (hotroot)
216			printf("** Root file system\n");
217		printf("** Phase 1 - Check Blocks and Sizes\n");
218	}
219	pass1();
220
221	/*
222	 * 1b: locate first references to duplicates, if any
223	 */
224	if (duplist) {
225		if (preen)
226			pfatal("INTERNAL ERROR: dups with -p");
227		printf("** Phase 1b - Rescan For More DUPS\n");
228		pass1b();
229	}
230
231	/*
232	 * 2: traverse directories from root to mark all connected directories
233	 */
234	if (preen == 0)
235		printf("** Phase 2 - Check Pathnames\n");
236	pass2();
237
238	/*
239	 * 3: scan inodes looking for disconnected directories
240	 */
241	if (preen == 0)
242		printf("** Phase 3 - Check Connectivity\n");
243	pass3();
244
245	/*
246	 * 4: scan inodes looking for disconnected files; check reference counts
247	 */
248	if (preen == 0)
249		printf("** Phase 4 - Check Reference Counts\n");
250	pass4();
251
252	/*
253	 * 5: check and repair resource counts in cylinder groups
254	 */
255	if (preen == 0)
256		printf("** Phase 5 - Check Cyl groups\n");
257	pass5();
258
259	/*
260	 * print out summary statistics
261	 */
262	n_ffree = sblock.fs_cstotal.cs_nffree;
263	n_bfree = sblock.fs_cstotal.cs_nbfree;
264	pwarn("%ld files, %ld used, %ld free ",
265	    n_files, n_blks, n_ffree + sblock.fs_frag * n_bfree);
266	printf("(%ld frags, %ld blocks, %ld.%ld%% fragmentation)\n",
267	    n_ffree, n_bfree, (n_ffree * 100) / sblock.fs_dsize,
268	    ((n_ffree * 1000 + sblock.fs_dsize / 2) / sblock.fs_dsize) % 10);
269	if (debug &&
270	    (n_files -= maxino - ROOTINO - sblock.fs_cstotal.cs_nifree))
271		printf("%ld files missing\n", n_files);
272	if (debug) {
273		n_blks += sblock.fs_ncg *
274			(cgdmin(&sblock, 0) - cgsblock(&sblock, 0));
275		n_blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0);
276		n_blks += howmany(sblock.fs_cssize, sblock.fs_fsize);
277		if (n_blks -= maxfsblock - (n_ffree + sblock.fs_frag * n_bfree))
278			printf("%ld blocks missing\n", n_blks);
279		if (duplist != NULL) {
280			printf("The following duplicate blocks remain:");
281			for (dp = duplist; dp; dp = dp->next)
282				printf(" %ld,", dp->dup);
283			printf("\n");
284		}
285		if (zlnhead != NULL) {
286			printf("The following zero link count inodes remain:");
287			for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
288				printf(" %lu,", zlnp->zlncnt);
289			printf("\n");
290		}
291	}
292	zlnhead = (struct zlncnt *)0;
293	duplist = (struct dups *)0;
294	muldup = (struct dups *)0;
295	inocleanup();
296	if (fsmodified) {
297		(void)time(&sblock.fs_time);
298		sbdirty();
299	}
300	if (cvtlevel && sblk.b_dirty) {
301		/*
302		 * Write out the duplicate super blocks
303		 */
304		for (cylno = 0; cylno < sblock.fs_ncg; cylno++)
305			bwrite(fswritefd, (char *)&sblock,
306			    fsbtodb(&sblock, cgsblock(&sblock, cylno)), SBSIZE);
307	}
308	if (!hotroot) {
309		ckfini(1);
310	} else {
311		struct statfs stfs_buf;
312		/*
313		 * Check to see if root is mounted read-write.
314		 */
315		if (statfs("/", &stfs_buf) == 0)
316			flags = stfs_buf.f_flags;
317		else
318			flags = 0;
319		ckfini(flags & MNT_RDONLY);
320	}
321	free(blockmap);
322	free(statemap);
323	free((char *)lncntp);
324	if (!fsmodified)
325		return (0);
326	if (!preen)
327		printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
328	if (rerun)
329		printf("\n***** PLEASE RERUN FSCK *****\n");
330	if (hotroot) {
331		struct ufs_args args;
332		int ret;
333		/*
334		 * We modified the root.  Do a mount update on
335		 * it, unless it is read-write, so we can continue.
336		 */
337		if (flags & MNT_RDONLY) {
338			args.fspec = 0;
339			args.export.ex_flags = 0;
340			args.export.ex_root = 0;
341			flags |= MNT_UPDATE | MNT_RELOAD;
342			ret = mount("ufs", "/", flags, &args);
343			if (ret == 0)
344				return (0);
345		}
346		if (!preen)
347			printf("\n***** REBOOT NOW *****\n");
348		sync();
349		return (4);
350	}
351	return (0);
352}
353