1 /* $OpenBSD: main.c,v 1.30 2023/03/08 04:43:06 guenther 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 static int 192 checkfilesys(char *filesys, char *mntpt, long auxdata, int child) 193 { 194 daddr32_t n_bfree; 195 struct dups *dp; 196 struct zlncnt *zlnp; 197 int i; 198 199 if (preen && child) 200 (void)signal(SIGQUIT, voidquit); 201 setcdevname(filesys, NULL, preen); 202 if (debug && preen) 203 pwarn("starting\n"); 204 205 switch (setup(filesys)) { 206 case 0: 207 if (preen) 208 pfatal("CAN'T CHECK FILE SYSTEM."); 209 case -1: 210 return (0); 211 } 212 /* 213 * 1: scan inodes tallying blocks used 214 */ 215 if (preen == 0) { 216 if (sblock.e2fs.e2fs_rev > E2FS_REV0) { 217 printf("** Last Mounted on %s\n", 218 sblock.e2fs.e2fs_fsmnt); 219 } 220 if (hotroot()) 221 printf("** Root file system\n"); 222 printf("** Phase 1 - Check Blocks and Sizes\n"); 223 } 224 pass1(); 225 226 /* 227 * 1b: locate first references to duplicates, if any 228 */ 229 if (duplist) { 230 if (preen) 231 pfatal("INTERNAL ERROR: dups with -p"); 232 printf("** Phase 1b - Rescan For More DUPS\n"); 233 pass1b(); 234 } 235 236 /* 237 * 2: traverse directories from root to mark all connected directories 238 */ 239 if (preen == 0) 240 printf("** Phase 2 - Check Pathnames\n"); 241 pass2(); 242 243 /* 244 * 3: scan inodes looking for disconnected directories 245 */ 246 if (preen == 0) 247 printf("** Phase 3 - Check Connectivity\n"); 248 pass3(); 249 250 /* 251 * 4: scan inodes looking for disconnected files; check reference counts 252 */ 253 if (preen == 0) 254 printf("** Phase 4 - Check Reference Counts\n"); 255 pass4(); 256 257 /* 258 * 5: check and repair resource counts in cylinder groups 259 */ 260 if (preen == 0) 261 printf("** Phase 5 - Check Cyl groups\n"); 262 pass5(); 263 264 /* 265 * print out summary statistics 266 */ 267 n_bfree = sblock.e2fs.e2fs_fbcount; 268 269 pwarn("%d files, %d used, %d free\n", 270 n_files, n_blks, n_bfree); 271 if (debug && 272 /* 9 reserved and unused inodes in FS */ 273 (n_files -= maxino - 9 - sblock.e2fs.e2fs_ficount)) 274 printf("%d files missing\n", n_files); 275 if (debug) { 276 for (i = 0; i < sblock.e2fs_ncg; i++) 277 n_blks += cgoverhead(i); 278 n_blks += sblock.e2fs.e2fs_first_dblock; 279 if (n_blks -= maxfsblock - n_bfree) 280 printf("%d blocks missing\n", n_blks); 281 if (duplist != NULL) { 282 printf("The following duplicate blocks remain:"); 283 for (dp = duplist; dp; dp = dp->next) 284 printf(" %d,", dp->dup); 285 printf("\n"); 286 } 287 if (zlnhead != NULL) { 288 printf("The following zero link count inodes remain:"); 289 for (zlnp = zlnhead; zlnp; zlnp = zlnp->next) 290 printf(" %llu,", 291 (unsigned long long)zlnp->zlncnt); 292 printf("\n"); 293 } 294 } 295 zlnhead = NULL; 296 duplist = NULL; 297 muldup = NULL; 298 inocleanup(); 299 if (fsmodified) { 300 time_t t; 301 (void)time(&t); 302 sblock.e2fs.e2fs_wtime = t; 303 sblock.e2fs.e2fs_lastfsck = t; 304 sbdirty(); 305 } 306 ckfini(1); 307 free(blockmap); 308 free(statemap); 309 free((char *)lncntp); 310 if (!fsmodified) 311 return (0); 312 if (!preen) 313 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 314 if (rerun) 315 printf("\n***** PLEASE RERUN FSCK *****\n"); 316 if (hotroot()) { 317 struct statfs stfs_buf; 318 /* 319 * We modified the root. Do a mount update on 320 * it, unless it is read-write, so we can continue. 321 */ 322 if (statfs("/", &stfs_buf) == 0) { 323 long flags = stfs_buf.f_flags; 324 struct ufs_args args; 325 int ret; 326 327 if (flags & MNT_RDONLY) { 328 args.fspec = 0; 329 args.export_info.ex_flags = 0; 330 args.export_info.ex_root = 0; 331 flags |= MNT_UPDATE | MNT_RELOAD; 332 ret = mount(MOUNT_EXT2FS, "/", flags, &args); 333 if (ret == 0) 334 return(0); 335 } 336 } 337 if (!preen) 338 printf("\n***** REBOOT NOW *****\n"); 339 sync(); 340 return (4); 341 } 342 return (0); 343 } 344 345 static void 346 usage(void) 347 { 348 extern char *__progname; 349 350 (void) fprintf(stderr, 351 "usage: %s [-dfnpy] [-b block#] [-m mode] filesystem\n", 352 __progname); 353 exit(1); 354 } 355