1 /* $NetBSD: main.c,v 1.55 2020/04/03 19:36:33 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 #include <sys/param.h>
33 #include <sys/time.h>
34 #include <sys/mount.h>
35
36 #include <ufs/lfs/lfs.h>
37 #include <ufs/lfs/lfs_accessors.h>
38
39 #include <fstab.h>
40 #include <stdbool.h>
41 #include <stdarg.h>
42 #include <stdlib.h>
43 #include <string.h>
44 #include <ctype.h>
45 #include <stdio.h>
46 #include <unistd.h>
47 #include <err.h>
48 #include <util.h>
49 #include <signal.h>
50
51 #include "fsck.h"
52 #include "extern.h"
53 #include "fsutil.h"
54 #include "exitvalues.h"
55
56 int Uflag;
57
58 static int argtoi(int, const char *, const char *, int);
59 static int checkfilesys(const char *, char *, long, int);
60 static void usage(void);
61 static void efun(int, const char *, ...);
62
63 static void
efun(int eval,const char * fmt,...)64 efun(int eval, const char *fmt, ...)
65 {
66 va_list ap;
67 va_start(ap, fmt);
68 verr(EEXIT, fmt, ap);
69 va_end(ap);
70 }
71
72 int
main(int argc,char ** argv)73 main(int argc, char **argv)
74 {
75 int ch;
76 int ret = FSCK_EXIT_OK;
77 const char *optstring = "b:dfi:m:npPqUy";
78 bool reallypreen;
79
80 reallypreen = false;
81 ckfinish = ckfini;
82 skipclean = 1;
83 exitonfail = 0;
84 idaddr = 0x0;
85 panic_func = vmsg;
86 esetfunc(efun);
87 while ((ch = getopt(argc, argv, optstring)) != -1) {
88 switch (ch) {
89 case 'b':
90 skipclean = 0;
91 bflag = argtoi('b', "number", optarg, 0);
92 printf("Alternate super block location: %d\n", bflag);
93 break;
94 case 'd':
95 debug++;
96 break;
97 case 'e':
98 exitonfail++;
99 break;
100 case 'f':
101 skipclean = 0;
102 reallypreen = true;
103 break;
104 case 'i':
105 idaddr = strtol(optarg, NULL, 0);
106 break;
107 case 'm':
108 lfmode = argtoi('m', "mode", optarg, 8);
109 if (lfmode & ~07777)
110 err(1, "bad mode to -m: %o", lfmode);
111 printf("** lost+found creation mode %o\n", lfmode);
112 break;
113
114 case 'n':
115 nflag++;
116 yflag = 0;
117 break;
118
119 case 'p':
120 preen++;
121 break;
122
123 case 'P': /* Progress meter not implemented. */
124 break;
125
126 case 'q':
127 quiet++;
128 break;
129 #ifndef SMALL
130 case 'U':
131 Uflag++;
132 break;
133 #endif
134 case 'y':
135 yflag++;
136 nflag = 0;
137 break;
138
139 default:
140 usage();
141 }
142 }
143
144 argc -= optind;
145 argv += optind;
146
147 if (!argc)
148 usage();
149
150 /*
151 * Don't do anything in preen mode. This is a replacement for
152 * version 1.111 of src/distrib/utils/sysinst/disks.c, which
153 * disabled fsck on installer-generated lfs partitions. That
154 * isn't the right way to do it; better to run fsck but have
155 * it not do anything, so that when the issues in fsck get
156 * resolved it can be turned back on.
157 *
158 * If you really want to run fsck in preen mode you can do:
159 * fsck_lfs -p -f image
160 *
161 * This was prompted by
162 * http://mail-index.netbsd.org/tech-kern/2010/02/09/msg007306.html.
163 *
164 * It would be nice if someone prepared a more detailed report
165 * of the problems.
166 *
167 * XXX.
168 */
169 if (preen && !reallypreen) {
170 return ret;
171 }
172
173 if (signal(SIGINT, SIG_IGN) != SIG_IGN)
174 (void) signal(SIGINT, catch);
175 if (preen)
176 (void) signal(SIGQUIT, catchquit);
177
178 while (argc-- > 0) {
179 int nret = checkfilesys(blockcheck(*argv++), 0, 0L, 0);
180 if (ret < nret)
181 ret = nret;
182 }
183
184 return returntosingle ? FSCK_EXIT_UNRESOLVED : ret;
185 }
186
187 static int
argtoi(int flag,const char * req,const char * str,int base)188 argtoi(int flag, const char *req, const char *str, int base)
189 {
190 char *cp;
191 int ret;
192
193 ret = (int) strtol(str, &cp, base);
194 if (cp == str || *cp)
195 err(FSCK_EXIT_USAGE, "-%c flag requires a %s", flag, req);
196 return (ret);
197 }
198
199 /*
200 * Check the specified filesystem.
201 */
202
203 /* ARGSUSED */
204 static int
checkfilesys(const char * filesys,char * mntpt,long auxdata,int child)205 checkfilesys(const char *filesys, char *mntpt, long auxdata, int child)
206 {
207 struct dups *dp;
208 struct zlncnt *zlnp;
209
210 if (preen && child)
211 (void) signal(SIGQUIT, voidquit);
212 setcdevname(filesys, preen);
213 if (debug && preen)
214 pwarn("starting\n");
215 switch (setup(filesys)) {
216 case 0:
217 if (preen)
218 pfatal("CAN'T CHECK FILE SYSTEM.");
219 /* FALLTHROUGH */
220 case -1:
221 return FSCK_EXIT_OK;
222 }
223
224 /*
225 * For LFS, "preen" means "roll forward". We don't check anything
226 * else.
227 */
228 if (preen == 0) {
229 printf("** Last Mounted on %s\n", lfs_sb_getfsmnt(fs));
230 if (hotroot())
231 printf("** Root file system\n");
232 /*
233 * 0: check segment checksums, inode ranges
234 */
235 printf("** Phase 0 - Check Inode Free List\n");
236 }
237
238 /*
239 * Check inode free list - we do this even if idaddr is set,
240 * since if we're writing we don't want to write a bad list.
241 */
242 pass0();
243
244 if (preen == 0) {
245 /*
246 * 1: scan inodes tallying blocks used
247 */
248 printf("** Phase 1 - Check Blocks and Sizes\n");
249 pass1();
250
251 /*
252 * 2: traverse directories from root to mark all connected directories
253 */
254 printf("** Phase 2 - Check Pathnames\n");
255 pass2();
256
257 /*
258 * 3: scan inodes looking for disconnected directories
259 */
260 printf("** Phase 3 - Check Connectivity\n");
261 pass3();
262
263 /*
264 * 4: scan inodes looking for disconnected files; check reference counts
265 */
266 printf("** Phase 4 - Check Reference Counts\n");
267 pass4();
268 }
269
270 /*
271 * 5: check segment byte totals and dirty flags, and cleanerinfo
272 */
273 if (!preen)
274 printf("** Phase 5 - Check Segment Block Accounting\n");
275 pass5();
276
277 if (debug && !preen) {
278 if (duplist != NULL) {
279 printf("The following duplicate blocks remain:");
280 for (dp = duplist; dp; dp = dp->next)
281 printf(" %lld,", (long long) dp->dup);
282 printf("\n");
283 }
284 if (zlnhead != NULL) {
285 printf("The following zero link count inodes remain:");
286 for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
287 printf(" %llu,",
288 (unsigned long long)zlnp->zlncnt);
289 printf("\n");
290 }
291 }
292
293 if (!rerun) {
294 if (!preen) {
295 if (reply("ROLL FILESYSTEM FORWARD") == 1) {
296 printf("** Phase 6 - Roll Forward\n");
297 pass6();
298 }
299 }
300 else {
301 pass6();
302 }
303 }
304 zlnhead = (struct zlncnt *) 0;
305 orphead = (struct zlncnt *) 0;
306 duplist = (struct dups *) 0;
307 muldup = (struct dups *) 0;
308 inocleanup();
309
310 /*
311 * print out summary statistics
312 */
313 pwarn("%ju files, %jd used, %jd free\n",
314 (uintmax_t) n_files, (intmax_t) n_blks,
315 (intmax_t) lfs_sb_getbfree(fs));
316
317 ckfini(1);
318
319 free(blockmap);
320 free(statemap);
321 free((char *)lncntp);
322 if (!fsmodified) {
323 return FSCK_EXIT_OK;
324 }
325 if (!preen)
326 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
327 if (rerun)
328 printf("\n***** PLEASE RERUN FSCK *****\n");
329 if (hotroot()) {
330 struct statvfs stfs_buf;
331 /*
332 * We modified the root. Do a mount update on
333 * it, unless it is read-write, so we can continue.
334 */
335 if (statvfs("/", &stfs_buf) == 0) {
336 long flags = stfs_buf.f_flag;
337 struct ulfs_args args;
338
339 if (flags & MNT_RDONLY) {
340 args.fspec = 0;
341 flags |= MNT_UPDATE | MNT_RELOAD;
342 if (mount(MOUNT_LFS, "/", flags,
343 &args, sizeof args) == 0)
344 return FSCK_EXIT_OK;
345 }
346 }
347 if (!preen)
348 printf("\n***** REBOOT NOW *****\n");
349 sync();
350 return FSCK_EXIT_ROOT_CHANGED;
351 }
352 return FSCK_EXIT_OK;
353 }
354
355 static void
usage(void)356 usage(void)
357 {
358
359 (void) fprintf(stderr,
360 "Usage: %s [-dfpqU] [-b block] [-m mode] [-y | -n] filesystem ...\n",
361 getprogname());
362 exit(FSCK_EXIT_USAGE);
363 }
364