main.c revision 50476 
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  "$FreeBSD: head/sbin/fsck_ffs/main.c 50476 1999-08-28 00:22:10Z peter $";
46#endif /* not lint */
47
48#include <sys/param.h>
49#include <sys/time.h>
50#include <sys/mount.h>
51#include <sys/resource.h>
52
53#include <ufs/ufs/dinode.h>
54#include <ufs/ufs/ufsmount.h>
55#include <ufs/ffs/fs.h>
56
57#include <err.h>
58#include <fstab.h>
59
60#include "fsck.h"
61
62static int argtoi __P((int flag, char *req, char *str, int base));
63static int docheck __P((struct fstab *fsp));
64static int checkfilesys __P((char *filesys, char *mntpt, long auxdata,
65		int child));
66int main __P((int argc, char *argv[]));
67
68int
69main(argc, argv)
70	int	argc;
71	char	*argv[];
72{
73	int ch;
74	int ret, maxrun = 0;
75	struct rlimit rlimit;
76
77	sync();
78	while ((ch = getopt(argc, argv, "dfpnNyYb:c:l:m:")) != -1) {
79		switch (ch) {
80		case 'p':
81			preen++;
82			break;
83
84		case 'b':
85			bflag = argtoi('b', "number", optarg, 10);
86			printf("Alternate super block location: %d\n", bflag);
87			break;
88
89		case 'c':
90			cvtlevel = argtoi('c', "conversion level", optarg, 10);
91			break;
92
93		case 'd':
94			debug++;
95			break;
96
97		case 'f':
98			fflag++;
99			break;
100
101		case 'l':
102			maxrun = argtoi('l', "number", optarg, 10);
103			break;
104
105		case 'm':
106			lfmode = argtoi('m', "mode", optarg, 8);
107			if (lfmode &~ 07777)
108				errx(EEXIT, "bad mode to -m: %o", lfmode);
109			printf("** lost+found creation mode %o\n", lfmode);
110			break;
111
112		case 'n':
113		case 'N':
114			nflag++;
115			yflag = 0;
116			break;
117
118		case 'y':
119		case 'Y':
120			yflag++;
121			nflag = 0;
122			break;
123
124		default:
125			errx(EEXIT, "%c option?", ch);
126		}
127	}
128	argc -= optind;
129	argv += optind;
130	if (signal(SIGINT, SIG_IGN) != SIG_IGN)
131		(void)signal(SIGINT, catch);
132	if (preen)
133		(void)signal(SIGQUIT, catchquit);
134	/*
135	 * Push up our allowed memory limit so we can cope
136	 * with huge filesystems.
137	 */
138	if (getrlimit(RLIMIT_DATA, &rlimit) == 0) {
139		rlimit.rlim_cur = rlimit.rlim_max;
140		(void)setrlimit(RLIMIT_DATA, &rlimit);
141	}
142	if (argc) {
143		while (argc-- > 0) {
144			char *path = blockcheck(*argv);
145
146			if (path == NULL)
147				pfatal("Can't check %s\n", *argv);
148			else
149				(void)checkfilesys(path, 0, 0L, 0);
150			++argv;
151		}
152		exit(0);
153	}
154	ret = checkfstab(preen, maxrun, docheck, checkfilesys);
155	if (returntosingle)
156		exit(2);
157	exit(ret);
158}
159
160static int
161argtoi(flag, req, str, base)
162	int flag;
163	char *req, *str;
164	int base;
165{
166	char *cp;
167	int ret;
168
169	ret = (int)strtol(str, &cp, base);
170	if (cp == str || *cp)
171		errx(EEXIT, "-%c flag requires a %s", flag, req);
172	return (ret);
173}
174
175/*
176 * Determine whether a filesystem should be checked.
177 */
178static int
179docheck(fsp)
180	register struct fstab *fsp;
181{
182
183	if (strcmp(fsp->fs_vfstype, "ufs") ||
184	    (strcmp(fsp->fs_type, FSTAB_RW) &&
185	     strcmp(fsp->fs_type, FSTAB_RO)) ||
186	    fsp->fs_passno == 0)
187		return (0);
188	return (1);
189}
190
191/*
192 * Check the specified filesystem.
193 */
194/* ARGSUSED */
195static int
196checkfilesys(filesys, mntpt, auxdata, child)
197	char *filesys, *mntpt;
198	long auxdata;
199	int child;
200{
201	ufs_daddr_t n_ffree, n_bfree;
202	struct dups *dp;
203	struct zlncnt *zlnp;
204	int cylno, flags;
205
206	if (preen && child)
207		(void)signal(SIGQUIT, voidquit);
208	cdevname = filesys;
209	if (debug && preen)
210		pwarn("starting\n");
211	switch (setup(filesys)) {
212	case 0:
213		if (preen)
214			pfatal("CAN'T CHECK FILE SYSTEM.");
215		return (0);
216	case -1:
217		pwarn("clean, %ld free ", sblock.fs_cstotal.cs_nffree +
218		    sblock.fs_frag * sblock.fs_cstotal.cs_nbfree);
219		printf("(%d frags, %d blocks, %.1f%% fragmentation)\n",
220		    sblock.fs_cstotal.cs_nffree, sblock.fs_cstotal.cs_nbfree,
221		    sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize);
222		return (0);
223	}
224
225	/*
226	 * Cleared if any questions answered no. Used to decide if
227	 * the superblock should be marked clean.
228	 */
229	resolved = 1;
230	/*
231	 * 1: scan inodes tallying blocks used
232	 */
233	if (preen == 0) {
234		printf("** Last Mounted on %s\n", sblock.fs_fsmnt);
235		if (hotroot)
236			printf("** Root file system\n");
237		printf("** Phase 1 - Check Blocks and Sizes\n");
238	}
239	pass1();
240
241	/*
242	 * 1b: locate first references to duplicates, if any
243	 */
244	if (duplist) {
245		if (preen || usedsoftdep)
246			pfatal("INTERNAL ERROR: dups with -p");
247		printf("** Phase 1b - Rescan For More DUPS\n");
248		pass1b();
249	}
250
251	/*
252	 * 2: traverse directories from root to mark all connected directories
253	 */
254	if (preen == 0)
255		printf("** Phase 2 - Check Pathnames\n");
256	pass2();
257
258	/*
259	 * 3: scan inodes looking for disconnected directories
260	 */
261	if (preen == 0)
262		printf("** Phase 3 - Check Connectivity\n");
263	pass3();
264
265	/*
266	 * 4: scan inodes looking for disconnected files; check reference counts
267	 */
268	if (preen == 0)
269		printf("** Phase 4 - Check Reference Counts\n");
270	pass4();
271
272	/*
273	 * 5: check and repair resource counts in cylinder groups
274	 */
275	if (preen == 0)
276		printf("** Phase 5 - Check Cyl groups\n");
277	pass5();
278
279	/*
280	 * print out summary statistics
281	 */
282	n_ffree = sblock.fs_cstotal.cs_nffree;
283	n_bfree = sblock.fs_cstotal.cs_nbfree;
284	pwarn("%ld files, %ld used, %ld free ",
285	    n_files, n_blks, n_ffree + sblock.fs_frag * n_bfree);
286	printf("(%d frags, %d blocks, %.1f%% fragmentation)\n",
287	    n_ffree, n_bfree, n_ffree * 100.0 / sblock.fs_dsize);
288	if (debug &&
289	    (n_files -= maxino - ROOTINO - sblock.fs_cstotal.cs_nifree))
290		printf("%d files missing\n", n_files);
291	if (debug) {
292		n_blks += sblock.fs_ncg *
293			(cgdmin(&sblock, 0) - cgsblock(&sblock, 0));
294		n_blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0);
295		n_blks += howmany(sblock.fs_cssize, sblock.fs_fsize);
296		if (n_blks -= maxfsblock - (n_ffree + sblock.fs_frag * n_bfree))
297			printf("%d blocks missing\n", n_blks);
298		if (duplist != NULL) {
299			printf("The following duplicate blocks remain:");
300			for (dp = duplist; dp; dp = dp->next)
301				printf(" %d,", dp->dup);
302			printf("\n");
303		}
304		if (zlnhead != NULL) {
305			printf("The following zero link count inodes remain:");
306			for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
307				printf(" %u,", zlnp->zlncnt);
308			printf("\n");
309		}
310	}
311	zlnhead = (struct zlncnt *)0;
312	duplist = (struct dups *)0;
313	muldup = (struct dups *)0;
314	inocleanup();
315	if (fsmodified) {
316		sblock.fs_time = time(NULL);
317		sbdirty();
318	}
319	if (cvtlevel && sblk.b_dirty) {
320		/*
321		 * Write out the duplicate super blocks
322		 */
323		for (cylno = 0; cylno < sblock.fs_ncg; cylno++)
324			bwrite(fswritefd, (char *)&sblock,
325			    fsbtodb(&sblock, cgsblock(&sblock, cylno)), SBSIZE);
326	}
327	if (rerun)
328		resolved = 0;
329	flags = 0;
330	if (hotroot) {
331		struct statfs stfs_buf;
332		/*
333		 * Check to see if root is mounted read-write.
334		 */
335		if (statfs("/", &stfs_buf) == 0)
336			flags = stfs_buf.f_flags;
337		if ((flags & MNT_RDONLY) == 0)
338			resolved = 0;
339	}
340	ckfini(resolved);
341
342	for (cylno = 0; cylno < sblock.fs_ncg; cylno++)
343		if (inostathead[cylno].il_stat != NULL)
344			free((char *)inostathead[cylno].il_stat);
345	free((char *)inostathead);
346	inostathead = NULL;
347	if (fsmodified && !preen)
348		printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
349	if (rerun)
350		printf("\n***** PLEASE RERUN FSCK *****\n");
351	if (hotroot) {
352		struct ufs_args args;
353		int ret;
354		/*
355		 * We modified the root.  Do a mount update on
356		 * it, unless it is read-write, so we can continue.
357		 */
358		if (flags & MNT_RDONLY) {
359			args.fspec = 0;
360			args.export.ex_flags = 0;
361			args.export.ex_root = 0;
362			flags |= MNT_UPDATE | MNT_RELOAD;
363			ret = mount("ufs", "/", flags, &args);
364			if (ret == 0)
365				return (0);
366		}
367		if (!fsmodified)
368			return (0);
369		if (!preen)
370			printf("\n***** REBOOT NOW *****\n");
371		sync();
372		return (4);
373	}
374	return (0);
375}
376