Remove a check that is always false.
[dragonfly.git] / sbin / fsck / main.c
CommitLineData
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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.
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32 *
33 * @(#) Copyright (c) 1980, 1986, 1993 The Regents of the University of California. All rights reserved.
34 * @(#)main.c 8.6 (Berkeley) 5/14/95
35 * $FreeBSD: src/sbin/fsck/main.c,v 1.21.2.1 2001/01/23 23:11:07 iedowse Exp $
feb65525 36 * $DragonFly: src/sbin/fsck/main.c,v 1.9 2005/11/06 12:13:53 swildner Exp $
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37 */
38
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39#include <sys/param.h>
40#include <sys/stat.h>
41#include <sys/time.h>
42#include <sys/mount.h>
43#include <sys/resource.h>
44
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45#include <vfs/ufs/dinode.h>
46#include <vfs/ufs/ufsmount.h>
47#include <vfs/ufs/fs.h>
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48
49#include <err.h>
50#include <errno.h>
51#include <fstab.h>
52#include <paths.h>
8af0d623 53#include <string.h>
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54
55#include "fsck.h"
56
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57static int argtoi(int flag, char *req, char *str, int base);
58static int docheck(struct fstab *fsp);
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59static int checkfilesys(char *filesys, char *mntpt, long auxdata,
60 int child);
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61static struct statfs *getmntpt(const char *);
62int main(int argc, char *argv[]);
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63
64int
b5744197 65main(int argc, char **argv)
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66{
67 int ch;
68 int ret, maxrun = 0;
69 struct rlimit rlimit;
70
71 sync();
72 while ((ch = getopt(argc, argv, "dfpnNyYb:c:l:m:")) != -1) {
73 switch (ch) {
74 case 'p':
75 preen++;
76 break;
77
78 case 'b':
79 bflag = argtoi('b', "number", optarg, 10);
80 printf("Alternate super block location: %d\n", bflag);
81 break;
82
83 case 'c':
84 cvtlevel = argtoi('c', "conversion level", optarg, 10);
85 break;
86
87 case 'd':
88 debug++;
89 break;
90
91 case 'f':
92 fflag++;
93 break;
94
95 case 'l':
96 maxrun = argtoi('l', "number", optarg, 10);
97 break;
98
99 case 'm':
100 lfmode = argtoi('m', "mode", optarg, 8);
101 if (lfmode &~ 07777)
102 errx(EEXIT, "bad mode to -m: %o", lfmode);
103 printf("** lost+found creation mode %o\n", lfmode);
104 break;
105
106 case 'n':
107 case 'N':
108 nflag++;
109 yflag = 0;
110 break;
111
112 case 'y':
113 case 'Y':
114 yflag++;
115 nflag = 0;
116 break;
117
118 default:
119 errx(EEXIT, "%c option?", ch);
120 }
121 }
122 argc -= optind;
123 argv += optind;
124 if (signal(SIGINT, SIG_IGN) != SIG_IGN)
7cee7052 125 signal(SIGINT, catch);
984263bc 126 if (preen)
7cee7052 127 signal(SIGQUIT, catchquit);
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128 signal(SIGINFO, infohandler);
129 /*
130 * Push up our allowed memory limit so we can cope
131 * with huge filesystems.
132 */
133 if (getrlimit(RLIMIT_DATA, &rlimit) == 0) {
134 rlimit.rlim_cur = rlimit.rlim_max;
7cee7052 135 setrlimit(RLIMIT_DATA, &rlimit);
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136 }
137 if (argc) {
138 while (argc-- > 0) {
139 char *path = blockcheck(*argv);
140
141 if (path == NULL)
142 pfatal("Can't check %s\n", *argv);
143 else
7cee7052 144 checkfilesys(path, 0, 0L, 0);
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145 ++argv;
146 }
147 exit(0);
148 }
149 ret = checkfstab(preen, maxrun, docheck, checkfilesys);
150 if (returntosingle)
151 exit(2);
152 exit(ret);
153}
154
155static int
b5744197 156argtoi(int flag, char *req, char *str, int base)
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157{
158 char *cp;
159 int ret;
160
161 ret = (int)strtol(str, &cp, base);
162 if (cp == str || *cp)
163 errx(EEXIT, "-%c flag requires a %s", flag, req);
164 return (ret);
165}
166
167/*
168 * Determine whether a filesystem should be checked.
169 */
170static int
feb65525 171docheck(struct fstab *fsp)
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172{
173
174 if (strcmp(fsp->fs_vfstype, "ufs") ||
175 (strcmp(fsp->fs_type, FSTAB_RW) &&
176 strcmp(fsp->fs_type, FSTAB_RO)) ||
177 fsp->fs_passno == 0)
178 return (0);
179 return (1);
180}
181
182/*
183 * Check the specified filesystem.
184 */
185/* ARGSUSED */
186static int
b5744197 187checkfilesys(char *filesys, char *mntpt, long auxdata, int child)
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188{
189 ufs_daddr_t n_ffree, n_bfree;
190 struct dups *dp;
191 struct statfs *mntbuf;
192 struct zlncnt *zlnp;
193 int cylno;
194
195 if (preen && child)
7cee7052 196 signal(SIGQUIT, voidquit);
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197 cdevname = filesys;
198 if (debug && preen)
199 pwarn("starting\n");
200 switch (setup(filesys)) {
201 case 0:
202 if (preen)
203 pfatal("CAN'T CHECK FILE SYSTEM.");
204 return (0);
205 case -1:
206 pwarn("clean, %ld free ", sblock.fs_cstotal.cs_nffree +
207 sblock.fs_frag * sblock.fs_cstotal.cs_nbfree);
208 printf("(%d frags, %d blocks, %.1f%% fragmentation)\n",
209 sblock.fs_cstotal.cs_nffree, sblock.fs_cstotal.cs_nbfree,
210 sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize);
211 return (0);
212 }
213 got_siginfo = 0;
214
215 /*
216 * Get the mount point information of the filesystem, if
217 * it is available.
218 */
219 mntbuf = getmntpt(filesys);
220
221 /*
222 * Cleared if any questions answered no. Used to decide if
223 * the superblock should be marked clean.
224 */
225 resolved = 1;
226 /*
227 * 1: scan inodes tallying blocks used
228 */
229 if (preen == 0) {
230 printf("** Last Mounted on %s\n", sblock.fs_fsmnt);
231 if (mntbuf != NULL && mntbuf->f_flags & MNT_ROOTFS)
232 printf("** Root file system\n");
233 printf("** Phase 1 - Check Blocks and Sizes\n");
234 }
235 pass1();
236
237 /*
238 * 1b: locate first references to duplicates, if any
239 */
240 if (duplist) {
241 if (preen || usedsoftdep)
242 pfatal("INTERNAL ERROR: dups with -p");
243 printf("** Phase 1b - Rescan For More DUPS\n");
244 pass1b();
245 }
246
247 /*
248 * 2: traverse directories from root to mark all connected directories
249 */
250 if (preen == 0)
251 printf("** Phase 2 - Check Pathnames\n");
252 pass2();
253
254 /*
255 * 3: scan inodes looking for disconnected directories
256 */
257 if (preen == 0)
258 printf("** Phase 3 - Check Connectivity\n");
259 pass3();
260
261 /*
262 * 4: scan inodes looking for disconnected files; check reference counts
263 */
264 if (preen == 0)
265 printf("** Phase 4 - Check Reference Counts\n");
266 pass4();
267
268 /*
269 * 5: check and repair resource counts in cylinder groups
270 */
271 if (preen == 0)
272 printf("** Phase 5 - Check Cyl groups\n");
273 pass5();
274
275 /*
276 * print out summary statistics
277 */
278 n_ffree = sblock.fs_cstotal.cs_nffree;
279 n_bfree = sblock.fs_cstotal.cs_nbfree;
280 pwarn("%ld files, %ld used, %ld free ",
281 n_files, n_blks, n_ffree + sblock.fs_frag * n_bfree);
282 printf("(%d frags, %d blocks, %.1f%% fragmentation)\n",
283 n_ffree, n_bfree, n_ffree * 100.0 / sblock.fs_dsize);
284 if (debug &&
285 (n_files -= maxino - ROOTINO - sblock.fs_cstotal.cs_nifree))
286 printf("%d files missing\n", n_files);
287 if (debug) {
288 n_blks += sblock.fs_ncg *
289 (cgdmin(&sblock, 0) - cgsblock(&sblock, 0));
290 n_blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0);
291 n_blks += howmany(sblock.fs_cssize, sblock.fs_fsize);
292 if (n_blks -= maxfsblock - (n_ffree + sblock.fs_frag * n_bfree))
293 printf("%d blocks missing\n", n_blks);
294 if (duplist != NULL) {
295 printf("The following duplicate blocks remain:");
296 for (dp = duplist; dp; dp = dp->next)
297 printf(" %d,", dp->dup);
298 printf("\n");
299 }
300 if (zlnhead != NULL) {
301 printf("The following zero link count inodes remain:");
302 for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
303 printf(" %u,", zlnp->zlncnt);
304 printf("\n");
305 }
306 }
307 zlnhead = (struct zlncnt *)0;
308 duplist = (struct dups *)0;
309 muldup = (struct dups *)0;
310 inocleanup();
311 if (fsmodified) {
312 sblock.fs_time = time(NULL);
313 sbdirty();
314 }
315 if (cvtlevel && sblk.b_dirty) {
316 /*
317 * Write out the duplicate super blocks
318 */
319 for (cylno = 0; cylno < sblock.fs_ncg; cylno++)
320 bwrite(fswritefd, (char *)&sblock,
321 fsbtodb(&sblock, cgsblock(&sblock, cylno)), SBSIZE);
322 }
323 if (rerun)
324 resolved = 0;
325
326 /*
327 * Check to see if the filesystem is mounted read-write.
328 */
329 if (mntbuf != NULL && (mntbuf->f_flags & MNT_RDONLY) == 0)
330 resolved = 0;
331 ckfini(resolved);
332
333 for (cylno = 0; cylno < sblock.fs_ncg; cylno++)
334 if (inostathead[cylno].il_stat != NULL)
335 free((char *)inostathead[cylno].il_stat);
336 free((char *)inostathead);
337 inostathead = NULL;
338 if (fsmodified && !preen)
339 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
340 if (rerun)
341 printf("\n***** PLEASE RERUN FSCK *****\n");
342 if (mntbuf != NULL) {
343 struct ufs_args args;
344 int ret;
345 /*
346 * We modified a mounted filesystem. Do a mount update on
347 * it unless it is read-write, so we can continue using it
348 * as safely as possible.
349 */
350 if (mntbuf->f_flags & MNT_RDONLY) {
351 args.fspec = 0;
352 args.export.ex_flags = 0;
353 args.export.ex_root = 0;
354 ret = mount("ufs", mntbuf->f_mntonname,
355 mntbuf->f_flags | MNT_UPDATE | MNT_RELOAD, &args);
356 if (ret == 0)
357 return (0);
358 pwarn("mount reload of '%s' failed: %s\n\n",
359 mntbuf->f_mntonname, strerror(errno));
360 }
361 if (!fsmodified)
362 return (0);
363 if (!preen)
364 printf("\n***** REBOOT NOW *****\n");
365 sync();
366 return (4);
367 }
368 return (0);
369}
370
371/*
372 * Get the directory that the device is mounted on.
373 */
374static struct statfs *
b5744197 375getmntpt(const char *name)
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376{
377 struct stat devstat, mntdevstat;
378 char device[sizeof(_PATH_DEV) - 1 + MNAMELEN];
379 char *devname;
380 struct statfs *mntbuf;
381 int i, mntsize;
382
383 if (stat(name, &devstat) != 0 ||
384 !(S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode)))
385 return (NULL);
386 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
387 for (i = 0; i < mntsize; i++) {
388 if (strcmp(mntbuf[i].f_fstypename, "ufs") != 0)
389 continue;
390 devname = mntbuf[i].f_mntfromname;
391 if (*devname != '/') {
392 strcpy(device, _PATH_DEV);
393 strcat(device, devname);
394 devname = device;
395 }
396 if (stat(devname, &mntdevstat) == 0 &&
397 mntdevstat.st_rdev == devstat.st_rdev)
398 return (&mntbuf[i]);
399 }
400 return (NULL);
401}