1 /* $OpenBSD: main.c,v 1.29 2021/01/27 05:03:23 deraadt Exp $ */ 2 /* $NetBSD: main.c,v 1.1 1997/06/11 11:21:50 bouyer Exp $ */ 3 4 /* 5 * Copyright (c) 1997 Manuel Bouyer. 6 * Copyright (c) 1980, 1986, 1993 7 * The Regents of the University of California. All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. 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 #include <sys/types.h> 35 #include <sys/signal.h> 36 #include <sys/time.h> 37 #include <sys/mount.h> 38 #include <ufs/ext2fs/ext2fs_dinode.h> 39 #include <ufs/ext2fs/ext2fs.h> 40 #include <fstab.h> 41 #include <stdlib.h> 42 #include <string.h> 43 #include <ctype.h> 44 #include <stdio.h> 45 #include <time.h> 46 #include <unistd.h> 47 #include <err.h> 48 49 #include "fsck.h" 50 #include "extern.h" 51 #include "fsutil.h" 52 53 volatile sig_atomic_t returntosingle; 54 55 int main(int, char *[]); 56 57 static int argtoi(int, char *, char *, int); 58 static int checkfilesys(char *, char *, long, int); 59 static void usage(void); 60 61 struct bufarea bufhead; /* head of list of other blks in filesys */ 62 struct bufarea sblk; /* file system superblock */ 63 struct bufarea asblk; /* first alternate superblock */ 64 struct bufarea *pdirbp; /* current directory contents */ 65 struct bufarea *pbp; /* current inode block */ 66 struct bufarea *getdatablk(daddr32_t, long); 67 struct m_ext2fs sblock; 68 69 struct dups *duplist; /* head of dup list */ 70 struct dups *muldup; /* end of unique duplicate dup block numbers */ 71 72 struct zlncnt *zlnhead; /* head of zero link count list */ 73 74 struct inoinfo **inphead, **inpsort; 75 long numdirs, listmax, inplast; 76 77 long secsize; /* actual disk sector size */ 78 char nflag; /* assume a no response */ 79 char yflag; /* assume a yes response */ 80 int bflag; /* location of alternate super block */ 81 int debug; /* output debugging info */ 82 int preen; /* just fix normal inconsistencies */ 83 char havesb; /* superblock has been read */ 84 char skipclean; /* skip clean file systems if preening */ 85 int fsmodified; /* 1 => write done to file system */ 86 int fsreadfd; /* file descriptor for reading file system */ 87 int fswritefd; /* file descriptor for writing file system */ 88 int rerun; /* rerun fsck. Only used in non-preen mode */ 89 90 daddr32_t maxfsblock; /* number of blocks in the file system */ 91 char *blockmap; /* ptr to primary blk allocation map */ 92 ino_t maxino; /* number of inodes in file system */ 93 ino_t lastino; /* last inode in use */ 94 char *statemap; /* ptr to inode state table */ 95 u_char *typemap; /* ptr to inode type table */ 96 int16_t *lncntp; /* ptr to link count table */ 97 98 ino_t lfdir; /* lost & found directory inode number */ 99 100 daddr32_t n_blks; /* number of blocks in use */ 101 daddr32_t n_files; /* number of files in use */ 102 103 struct ext2fs_dinode zino; 104 105 int 106 main(int argc, char *argv[]) 107 { 108 int ch; 109 int ret = 0; 110 111 checkroot(); 112 113 sync(); 114 skipclean = 1; 115 while ((ch = getopt(argc, argv, "b:dfm:npy")) != -1) { 116 switch (ch) { 117 case 'b': 118 skipclean = 0; 119 bflag = argtoi('b', "number", optarg, 10); 120 printf("Alternate super block location: %d\n", bflag); 121 break; 122 123 case 'd': 124 debug = 1; 125 break; 126 127 case 'f': 128 skipclean = 0; 129 break; 130 131 case 'm': 132 lfmode = argtoi('m', "mode", optarg, 8); 133 if (lfmode &~ 07777) 134 errexit("bad mode to -m: %o\n", lfmode); 135 printf("** lost+found creation mode %o\n", lfmode); 136 break; 137 138 case 'n': 139 nflag = 1; 140 yflag = 0; 141 break; 142 143 case 'p': 144 preen = 1; 145 break; 146 147 case 'y': 148 yflag = 1; 149 nflag = 0; 150 break; 151 152 default: 153 usage(); 154 } 155 } 156 157 argc -= optind; 158 argv += optind; 159 160 if (argc != 1) 161 usage(); 162 163 if (signal(SIGINT, SIG_IGN) != SIG_IGN) 164 (void)signal(SIGINT, catch); 165 if (preen) 166 (void)signal(SIGQUIT, catchquit); 167 168 (void)checkfilesys(blockcheck(*argv), 0, 0L, 0); 169 170 if (returntosingle) 171 ret = 2; 172 173 exit(ret); 174 } 175 176 static int 177 argtoi(int flag, char *req, char *str, int base) 178 { 179 char *cp; 180 int ret; 181 182 ret = (int)strtol(str, &cp, base); 183 if (cp == str || *cp) 184 errexit("-%c flag requires a %s\n", flag, req); 185 return (ret); 186 } 187 188 /* 189 * Check the specified filesystem. 190 */ 191 /* ARGSUSED */ 192 static int 193 checkfilesys(char *filesys, char *mntpt, long auxdata, int child) 194 { 195 daddr32_t n_bfree; 196 struct dups *dp; 197 struct zlncnt *zlnp; 198 int i; 199 200 if (preen && child) 201 (void)signal(SIGQUIT, voidquit); 202 setcdevname(filesys, NULL, preen); 203 if (debug && preen) 204 pwarn("starting\n"); 205 206 switch (setup(filesys)) { 207 case 0: 208 if (preen) 209 pfatal("CAN'T CHECK FILE SYSTEM."); 210 case -1: 211 return (0); 212 } 213 /* 214 * 1: scan inodes tallying blocks used 215 */ 216 if (preen == 0) { 217 if (sblock.e2fs.e2fs_rev > E2FS_REV0) { 218 printf("** Last Mounted on %s\n", 219 sblock.e2fs.e2fs_fsmnt); 220 } 221 if (hotroot()) 222 printf("** Root file system\n"); 223 printf("** Phase 1 - Check Blocks and Sizes\n"); 224 } 225 pass1(); 226 227 /* 228 * 1b: locate first references to duplicates, if any 229 */ 230 if (duplist) { 231 if (preen) 232 pfatal("INTERNAL ERROR: dups with -p"); 233 printf("** Phase 1b - Rescan For More DUPS\n"); 234 pass1b(); 235 } 236 237 /* 238 * 2: traverse directories from root to mark all connected directories 239 */ 240 if (preen == 0) 241 printf("** Phase 2 - Check Pathnames\n"); 242 pass2(); 243 244 /* 245 * 3: scan inodes looking for disconnected directories 246 */ 247 if (preen == 0) 248 printf("** Phase 3 - Check Connectivity\n"); 249 pass3(); 250 251 /* 252 * 4: scan inodes looking for disconnected files; check reference counts 253 */ 254 if (preen == 0) 255 printf("** Phase 4 - Check Reference Counts\n"); 256 pass4(); 257 258 /* 259 * 5: check and repair resource counts in cylinder groups 260 */ 261 if (preen == 0) 262 printf("** Phase 5 - Check Cyl groups\n"); 263 pass5(); 264 265 /* 266 * print out summary statistics 267 */ 268 n_bfree = sblock.e2fs.e2fs_fbcount; 269 270 pwarn("%d files, %d used, %d free\n", 271 n_files, n_blks, n_bfree); 272 if (debug && 273 /* 9 reserved and unused inodes in FS */ 274 (n_files -= maxino - 9 - sblock.e2fs.e2fs_ficount)) 275 printf("%d files missing\n", n_files); 276 if (debug) { 277 for (i = 0; i < sblock.e2fs_ncg; i++) 278 n_blks += cgoverhead(i); 279 n_blks += sblock.e2fs.e2fs_first_dblock; 280 if (n_blks -= maxfsblock - n_bfree) 281 printf("%d blocks missing\n", n_blks); 282 if (duplist != NULL) { 283 printf("The following duplicate blocks remain:"); 284 for (dp = duplist; dp; dp = dp->next) 285 printf(" %d,", dp->dup); 286 printf("\n"); 287 } 288 if (zlnhead != NULL) { 289 printf("The following zero link count inodes remain:"); 290 for (zlnp = zlnhead; zlnp; zlnp = zlnp->next) 291 printf(" %llu,", 292 (unsigned long long)zlnp->zlncnt); 293 printf("\n"); 294 } 295 } 296 zlnhead = NULL; 297 duplist = NULL; 298 muldup = NULL; 299 inocleanup(); 300 if (fsmodified) { 301 time_t t; 302 (void)time(&t); 303 sblock.e2fs.e2fs_wtime = t; 304 sblock.e2fs.e2fs_lastfsck = t; 305 sbdirty(); 306 } 307 ckfini(1); 308 free(blockmap); 309 free(statemap); 310 free((char *)lncntp); 311 if (!fsmodified) 312 return (0); 313 if (!preen) 314 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 315 if (rerun) 316 printf("\n***** PLEASE RERUN FSCK *****\n"); 317 if (hotroot()) { 318 struct statfs stfs_buf; 319 /* 320 * We modified the root. Do a mount update on 321 * it, unless it is read-write, so we can continue. 322 */ 323 if (statfs("/", &stfs_buf) == 0) { 324 long flags = stfs_buf.f_flags; 325 struct ufs_args args; 326 int ret; 327 328 if (flags & MNT_RDONLY) { 329 args.fspec = 0; 330 args.export_info.ex_flags = 0; 331 args.export_info.ex_root = 0; 332 flags |= MNT_UPDATE | MNT_RELOAD; 333 ret = mount(MOUNT_EXT2FS, "/", flags, &args); 334 if (ret == 0) 335 return(0); 336 } 337 } 338 if (!preen) 339 printf("\n***** REBOOT NOW *****\n"); 340 sync(); 341 return (4); 342 } 343 return (0); 344 } 345 346 static void 347 usage(void) 348 { 349 extern char *__progname; 350 351 (void) fprintf(stderr, 352 "usage: %s [-dfnpy] [-b block#] [-m mode] filesystem\n", 353 __progname); 354 exit(1); 355 } 356