1 /* $NetBSD: main.c,v 1.41 2020/04/05 15:25:39 joerg Exp $ */
2
3 /*
4 * Copyright (c) 1980, 1986, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 /*
33 * Copyright (c) 1997 Manuel Bouyer.
34 *
35 * Redistribution and use in source and binary forms, with or without
36 * modification, are permitted provided that the following conditions
37 * are met:
38 * 1. Redistributions of source code must retain the above copyright
39 * notice, this list of conditions and the following disclaimer.
40 * 2. Redistributions in binary form must reproduce the above copyright
41 * notice, this list of conditions and the following disclaimer in the
42 * documentation and/or other materials provided with the distribution.
43 *
44 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
45 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
46 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
47 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
48 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
49 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
50 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
51 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
52 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
53 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
54 */
55
56 #include <sys/cdefs.h>
57 #ifndef lint
58 __COPYRIGHT("@(#) Copyright (c) 1980, 1986, 1993\
59 The Regents of the University of California. All rights reserved.");
60 #endif /* not lint */
61
62 #ifndef lint
63 #if 0
64 static char sccsid[] = "@(#)main.c 8.2 (Berkeley) 1/23/94";
65 #else
66 __RCSID("$NetBSD: main.c,v 1.41 2020/04/05 15:25:39 joerg Exp $");
67 #endif
68 #endif /* not lint */
69
70 #include <sys/param.h>
71 #include <sys/time.h>
72 #include <sys/mount.h>
73 #include <ufs/ufs/ufsmount.h>
74 #include <ufs/ext2fs/ext2fs_dinode.h>
75 #include <ufs/ext2fs/ext2fs.h>
76 #include <fstab.h>
77 #include <stdlib.h>
78 #include <string.h>
79 #include <ctype.h>
80 #include <stdio.h>
81 #include <time.h>
82 #include <unistd.h>
83 #include <signal.h>
84
85 #include "fsck.h"
86 #include "extern.h"
87 #include "fsutil.h"
88 #include "exitvalues.h"
89
90 struct bufarea bufhead;
91 struct bufarea sblk;
92 struct bufarea asblk;
93 struct bufarea *pdirbp;
94 struct bufarea *pbp;
95 struct bufarea *getdatablk(daddr_t, long);
96 struct m_ext2fs sblock;
97 struct dups *duplist;
98 struct dups *muldup;
99 struct zlncnt *zlnhead;
100 struct inoinfo **inphead, **inpsort;
101 long numdirs, listmax, inplast;
102 long dev_bsize;
103 long secsize;
104 char nflag;
105 char yflag;
106 int bflag;
107 int Uflag;
108 int debug;
109 int preen;
110 char havesb;
111 char skipclean;
112 int fsmodified;
113 int fsreadfd;
114 int fswritefd;
115 int rerun;
116 daddr_t maxfsblock;
117 char *blockmap;
118 ino_t maxino;
119 ino_t lastino;
120 char *statemap;
121 u_char *typemap;
122 int16_t *lncntp;
123 ino_t lfdir;
124 daddr_t n_blks;
125 daddr_t n_files;
126 struct ext2fs_dinode zino;
127
128 static int argtoi(int, const char *, const char *, int);
129 static int checkfilesys(const char *, char *, long, int);
130 static void usage(void) __dead;
131
132 int
main(int argc,char * argv[])133 main(int argc, char *argv[])
134 {
135 int ch;
136 int ret = FSCK_EXIT_OK;
137
138 ckfinish = ckfini;
139 sync();
140 skipclean = 1;
141 while ((ch = getopt(argc, argv, "b:dfm:npPqUy")) != -1) {
142 switch (ch) {
143 case 'b':
144 skipclean = 0;
145 bflag = argtoi('b', "number", optarg, 10);
146 printf("Alternate super block location: %d\n", bflag);
147 break;
148
149 case 'd':
150 debug++;
151 break;
152
153 case 'f':
154 skipclean = 0;
155 break;
156
157 case 'm':
158 lfmode = argtoi('m', "mode", optarg, 8);
159 if (lfmode &~ 07777)
160 errexit("bad mode to -m: %o", lfmode);
161 printf("** lost+found creation mode %o\n", lfmode);
162 break;
163
164 case 'n':
165 nflag++;
166 yflag = 0;
167 break;
168
169 case 'p':
170 preen++;
171 break;
172
173 case 'P':
174 /* Progress meter not implemented. */
175 break;
176
177 case 'q': /* Quiet not implemented */
178 break;
179
180 #ifndef SMALL
181 case 'U':
182 Uflag++;
183 break;
184 #endif
185
186 case 'y':
187 yflag++;
188 nflag = 0;
189 break;
190
191 default:
192 usage();
193 }
194 }
195
196 argc -= optind;
197 argv += optind;
198
199 if (!argc)
200 usage();
201
202 if (signal(SIGINT, SIG_IGN) != SIG_IGN)
203 (void)signal(SIGINT, catch);
204 if (preen)
205 (void)signal(SIGQUIT, catchquit);
206
207 while (argc-- > 0) {
208 int nret = checkfilesys(blockcheck(*argv++), 0, 0L, 0);
209 if (ret < nret)
210 ret = nret;
211 }
212
213 return returntosingle ? FSCK_EXIT_UNRESOLVED : ret;
214 }
215
216 static int
argtoi(int flag,const char * req,const char * str,int base)217 argtoi(int flag, const char *req, const char *str, int base)
218 {
219 char *cp;
220 int ret;
221
222 ret = (int)strtol(str, &cp, base);
223 if (cp == str || *cp)
224 errexit("-%c flag requires a %s", flag, req);
225 return (ret);
226 }
227
228 /*
229 * Check the specified filesystem.
230 */
231 /* ARGSUSED */
232 static int
checkfilesys(const char * filesys,char * mntpt,long auxdata,int child)233 checkfilesys(const char *filesys, char *mntpt, long auxdata, int child)
234 {
235 daddr_t n_bfree;
236 struct dups *dp;
237 struct zlncnt *zlnp;
238 int i;
239
240 if (preen && child)
241 (void)signal(SIGQUIT, voidquit);
242 setcdevname(filesys, preen);
243 if (debug && preen)
244 pwarn("starting\n");
245 switch (setup(filesys)) {
246 case 0:
247 if (preen)
248 pfatal("CAN'T CHECK FILE SYSTEM.");
249 /* FALLTHROUGH */
250 case -1:
251 return FSCK_EXIT_OK;
252 }
253 /*
254 * 1: scan inodes tallying blocks used
255 */
256 if (preen == 0) {
257 if (sblock.e2fs.e2fs_rev > E2FS_REV0) {
258 printf("** Last Mounted on %s\n",
259 sblock.e2fs.e2fs_fsmnt);
260 }
261 if (hotroot())
262 printf("** Root file system\n");
263 printf("** Phase 1 - Check Blocks and Sizes\n");
264 }
265 pass1();
266
267 /*
268 * 1b: locate first references to duplicates, if any
269 */
270 if (duplist) {
271 if (preen)
272 pfatal("INTERNAL ERROR: dups with -p");
273 printf("** Phase 1b - Rescan For More DUPS\n");
274 pass1b();
275 }
276
277 /*
278 * 2: traverse directories from root to mark all connected directories
279 */
280 if (preen == 0)
281 printf("** Phase 2 - Check Pathnames\n");
282 pass2();
283
284 /*
285 * 3: scan inodes looking for disconnected directories
286 */
287 if (preen == 0)
288 printf("** Phase 3 - Check Connectivity\n");
289 pass3();
290
291 /*
292 * 4: scan inodes looking for disconnected files; check reference counts
293 */
294 if (preen == 0)
295 printf("** Phase 4 - Check Reference Counts\n");
296 pass4();
297
298 /*
299 * 5: check and repair resource counts in cylinder groups
300 */
301 if (preen == 0)
302 printf("** Phase 5 - Check Cyl groups\n");
303 pass5();
304
305 /*
306 * print out summary statistics
307 */
308 n_bfree = sblock.e2fs.e2fs_fbcount;
309
310 pwarn("%lld files, %lld used, %lld free\n",
311 (long long)n_files, (long long)n_blks, (long long)n_bfree);
312 if (debug &&
313 /* 9 reserved and unused inodes in FS */
314 (n_files -= maxino - 9 - sblock.e2fs.e2fs_ficount))
315 printf("%lld files missing\n", (long long)n_files);
316 if (debug) {
317 for (i = 0; i < sblock.e2fs_ncg; i++)
318 n_blks += cgoverhead(i);
319 n_blks += sblock.e2fs.e2fs_first_dblock;
320 if (n_blks -= maxfsblock - n_bfree)
321 printf("%lld blocks missing\n", (long long)n_blks);
322 if (duplist != NULL) {
323 printf("The following duplicate blocks remain:");
324 for (dp = duplist; dp; dp = dp->next)
325 printf(" %lld,", (long long)dp->dup);
326 printf("\n");
327 }
328 if (zlnhead != NULL) {
329 printf("The following zero link count inodes remain:");
330 for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
331 printf(" %llu,",
332 (unsigned long long)zlnp->zlncnt);
333 printf("\n");
334 }
335 }
336 zlnhead = (struct zlncnt *)0;
337 duplist = (struct dups *)0;
338 muldup = (struct dups *)0;
339 inocleanup();
340 if (fsmodified) {
341 time_t t;
342 (void)time(&t);
343 sblock.e2fs.e2fs_wtime = t;
344 sblock.e2fs.e2fs_lastfsck = t;
345 sbdirty();
346 }
347 ckfini(1);
348 free(blockmap);
349 free(statemap);
350 free((char *)lncntp);
351 if (!fsmodified)
352 return FSCK_EXIT_OK;
353 if (!preen)
354 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
355 if (rerun)
356 printf("\n***** PLEASE RERUN FSCK *****\n");
357 if (hotroot()) {
358 struct statvfs stfs_buf;
359 /*
360 * We modified the root. Do a mount update on
361 * it, unless it is read-write, so we can continue.
362 */
363 if (statvfs("/", &stfs_buf) == 0) {
364 long flags = stfs_buf.f_flag;
365 struct ufs_args args;
366
367 if (flags & MNT_RDONLY) {
368 args.fspec = 0;
369 flags |= MNT_UPDATE | MNT_RELOAD;
370 if (mount(MOUNT_EXT2FS, "/", flags,
371 &args, sizeof args) == 0)
372 return FSCK_EXIT_OK;
373 }
374 }
375 if (!preen)
376 printf("\n***** REBOOT NOW *****\n");
377 sync();
378 return FSCK_EXIT_ROOT_CHANGED;
379 }
380 return FSCK_EXIT_OK;
381 }
382
383 static void
usage(void)384 usage(void)
385 {
386
387 (void) fprintf(stderr,
388 "usage: %s [-dfnpUy] [-b block] [-m mode] filesystem ...\n",
389 getprogname());
390 exit(FSCK_EXIT_USAGE);
391 }
392