1 /* $NetBSD: main.c,v 1.48 2014/07/13 02:44:21 dholland 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 #include <ufs/lfs/lfs.h> 36 37 #include <fstab.h> 38 #include <stdbool.h> 39 #include <stdarg.h> 40 #include <stdlib.h> 41 #include <string.h> 42 #include <ctype.h> 43 #include <stdio.h> 44 #include <unistd.h> 45 #include <err.h> 46 #include <util.h> 47 #include <signal.h> 48 49 #include "fsck.h" 50 #include "extern.h" 51 #include "fsutil.h" 52 #include "exitvalues.h" 53 54 volatile sig_atomic_t returntosingle = 0; 55 56 static int argtoi(int, const char *, const char *, int); 57 static int checkfilesys(const char *, char *, long, int); 58 static void usage(void); 59 static void efun(int, const char *, ...); 60 extern void (*panic_func)(int, const char *, va_list); 61 62 static void 63 efun(int eval, const char *fmt, ...) 64 { 65 va_list ap; 66 va_start(ap, fmt); 67 verr(EEXIT, fmt, ap); 68 va_end(ap); 69 } 70 71 int 72 main(int argc, char **argv) 73 { 74 int ch; 75 int ret = FSCK_EXIT_OK; 76 const char *optstring = "b:dfi:m:npPqUy"; 77 bool reallypreen; 78 79 reallypreen = false; 80 ckfinish = ckfini; 81 skipclean = 1; 82 exitonfail = 0; 83 idaddr = 0x0; 84 panic_func = vmsg; 85 esetfunc(efun); 86 while ((ch = getopt(argc, argv, optstring)) != -1) { 87 switch (ch) { 88 case 'b': 89 skipclean = 0; 90 bflag = argtoi('b', "number", optarg, 0); 91 printf("Alternate super block location: %d\n", bflag); 92 break; 93 case 'd': 94 debug++; 95 break; 96 case 'e': 97 exitonfail++; 98 break; 99 case 'f': 100 skipclean = 0; 101 reallypreen = true; 102 break; 103 case 'i': 104 idaddr = strtol(optarg, NULL, 0); 105 break; 106 case 'm': 107 lfmode = argtoi('m', "mode", optarg, 8); 108 if (lfmode & ~07777) 109 err(1, "bad mode to -m: %o\n", lfmode); 110 printf("** lost+found creation mode %o\n", lfmode); 111 break; 112 113 case 'n': 114 nflag++; 115 yflag = 0; 116 break; 117 118 case 'p': 119 preen++; 120 break; 121 122 case 'P': /* Progress meter not implemented. */ 123 break; 124 125 case 'q': 126 quiet++; 127 break; 128 #ifndef SMALL 129 case 'U': 130 Uflag++; 131 break; 132 #endif 133 case 'y': 134 yflag++; 135 nflag = 0; 136 break; 137 138 default: 139 usage(); 140 } 141 } 142 143 argc -= optind; 144 argv += optind; 145 146 if (!argc) 147 usage(); 148 149 /* 150 * Don't do anything in preen mode. This is a replacement for 151 * version 1.111 of src/distrib/utils/sysinst/disks.c, which 152 * disabled fsck on installer-generated lfs partitions. That 153 * isn't the right way to do it; better to run fsck but have 154 * it not do anything, so that when the issues in fsck get 155 * resolved it can be turned back on. 156 * 157 * If you really want to run fsck in preen mode you can do: 158 * fsck_lfs -p -f image 159 * 160 * This was prompted by 161 * http://mail-index.netbsd.org/tech-kern/2010/02/09/msg007306.html. 162 * 163 * It would be nice if someone prepared a more detailed report 164 * of the problems. 165 * 166 * XXX. 167 */ 168 if (preen && !reallypreen) { 169 return ret; 170 } 171 172 if (signal(SIGINT, SIG_IGN) != SIG_IGN) 173 (void) signal(SIGINT, catch); 174 if (preen) 175 (void) signal(SIGQUIT, catchquit); 176 177 while (argc-- > 0) { 178 int nret = checkfilesys(blockcheck(*argv++), 0, 0L, 0); 179 if (ret < nret) 180 ret = nret; 181 } 182 183 return returntosingle ? FSCK_EXIT_UNRESOLVED : ret; 184 } 185 186 static int 187 argtoi(int flag, const char *req, const char *str, int base) 188 { 189 char *cp; 190 int ret; 191 192 ret = (int) strtol(str, &cp, base); 193 if (cp == str || *cp) 194 err(FSCK_EXIT_USAGE, "-%c flag requires a %s\n", flag, req); 195 return (ret); 196 } 197 198 /* 199 * Check the specified filesystem. 200 */ 201 202 /* ARGSUSED */ 203 static int 204 checkfilesys(const char *filesys, char *mntpt, long auxdata, int child) 205 { 206 struct dups *dp; 207 struct zlncnt *zlnp; 208 209 if (preen && child) 210 (void) signal(SIGQUIT, voidquit); 211 setcdevname(filesys, preen); 212 if (debug && preen) 213 pwarn("starting\n"); 214 switch (setup(filesys)) { 215 case 0: 216 if (preen) 217 pfatal("CAN'T CHECK FILE SYSTEM."); 218 case -1: 219 return FSCK_EXIT_OK; 220 } 221 222 /* 223 * For LFS, "preen" means "roll forward". We don't check anything 224 * else. 225 */ 226 if (preen == 0) { 227 printf("** Last Mounted on %s\n", fs->lfs_fsmnt); 228 if (hotroot()) 229 printf("** Root file system\n"); 230 /* 231 * 0: check segment checksums, inode ranges 232 */ 233 printf("** Phase 0 - Check Inode Free List\n"); 234 } 235 236 /* 237 * Check inode free list - we do this even if idaddr is set, 238 * since if we're writing we don't want to write a bad list. 239 */ 240 pass0(); 241 242 if (preen == 0) { 243 /* 244 * 1: scan inodes tallying blocks used 245 */ 246 printf("** Phase 1 - Check Blocks and Sizes\n"); 247 pass1(); 248 249 /* 250 * 2: traverse directories from root to mark all connected directories 251 */ 252 printf("** Phase 2 - Check Pathnames\n"); 253 pass2(); 254 255 /* 256 * 3: scan inodes looking for disconnected directories 257 */ 258 printf("** Phase 3 - Check Connectivity\n"); 259 pass3(); 260 261 /* 262 * 4: scan inodes looking for disconnected files; check reference counts 263 */ 264 printf("** Phase 4 - Check Reference Counts\n"); 265 pass4(); 266 } 267 268 /* 269 * 5: check segment byte totals and dirty flags, and cleanerinfo 270 */ 271 if (!preen) 272 printf("** Phase 5 - Check Segment Block Accounting\n"); 273 pass5(); 274 275 if (debug && !preen) { 276 if (duplist != NULL) { 277 printf("The following duplicate blocks remain:"); 278 for (dp = duplist; dp; dp = dp->next) 279 printf(" %lld,", (long long) dp->dup); 280 printf("\n"); 281 } 282 if (zlnhead != NULL) { 283 printf("The following zero link count inodes remain:"); 284 for (zlnp = zlnhead; zlnp; zlnp = zlnp->next) 285 printf(" %llu,", 286 (unsigned long long)zlnp->zlncnt); 287 printf("\n"); 288 } 289 } 290 291 if (!rerun) { 292 if (!preen) { 293 if (reply("ROLL FILESYSTEM FORWARD") == 1) { 294 printf("** Phase 6 - Roll Forward\n"); 295 pass6(); 296 } 297 } 298 else { 299 pass6(); 300 } 301 } 302 zlnhead = (struct zlncnt *) 0; 303 orphead = (struct zlncnt *) 0; 304 duplist = (struct dups *) 0; 305 muldup = (struct dups *) 0; 306 inocleanup(); 307 308 /* 309 * print out summary statistics 310 */ 311 pwarn("%llu files, %lld used, %lld free\n", 312 (unsigned long long)n_files, (long long) n_blks, 313 (long long) fs->lfs_bfree); 314 315 ckfini(1); 316 317 free(blockmap); 318 free(statemap); 319 free((char *)lncntp); 320 if (!fsmodified) { 321 return FSCK_EXIT_OK; 322 } 323 if (!preen) 324 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 325 if (rerun) 326 printf("\n***** PLEASE RERUN FSCK *****\n"); 327 if (hotroot()) { 328 struct statvfs stfs_buf; 329 /* 330 * We modified the root. Do a mount update on 331 * it, unless it is read-write, so we can continue. 332 */ 333 if (statvfs("/", &stfs_buf) == 0) { 334 long flags = stfs_buf.f_flag; 335 struct ulfs_args args; 336 337 if (flags & MNT_RDONLY) { 338 args.fspec = 0; 339 flags |= MNT_UPDATE | MNT_RELOAD; 340 if (mount(MOUNT_LFS, "/", flags, 341 &args, sizeof args) == 0) 342 return FSCK_EXIT_OK; 343 } 344 } 345 if (!preen) 346 printf("\n***** REBOOT NOW *****\n"); 347 sync(); 348 return FSCK_EXIT_ROOT_CHANGED; 349 } 350 return FSCK_EXIT_OK; 351 } 352 353 static void 354 usage(void) 355 { 356 357 (void) fprintf(stderr, 358 "Usage: %s [-dfpqU] [-b block] [-m mode] [-y | -n] filesystem ...\n", 359 getprogname()); 360 exit(FSCK_EXIT_USAGE); 361 } 362