1 /* $OpenBSD: main.c,v 1.50 2016/09/09 15:37:15 tb Exp $ */ 2 /* $NetBSD: main.c,v 1.22 1996/10/11 20:15:48 thorpej Exp $ */ 3 4 /* 5 * Copyright (c) 1980, 1986, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #include <sys/time.h> 34 #include <sys/signal.h> 35 #include <sys/mount.h> 36 #include <ufs/ufs/dinode.h> 37 #include <ufs/ffs/fs.h> 38 #include <stdlib.h> 39 #include <string.h> 40 #include <ctype.h> 41 #include <stdio.h> 42 #include <unistd.h> 43 #include <err.h> 44 45 #include "fsck.h" 46 #include "extern.h" 47 #include "fsutil.h" 48 49 volatile sig_atomic_t returntosingle; 50 51 int argtoi(int, char *, char *, int); 52 int checkfilesys(char *, char *, long, int); 53 int main(int, char *[]); 54 55 extern char *__progname; 56 57 void 58 usage(void) 59 { 60 fprintf(stderr, "usage: %s [-fnpy] [-b block#] [-c level] " 61 "[-m mode] filesystem\n", __progname); 62 exit(1); 63 } 64 int 65 main(int argc, char *argv[]) 66 { 67 int ch; 68 int ret = 0; 69 70 sync(); 71 skipclean = 1; 72 while ((ch = getopt(argc, argv, "dfpnNyYb:c:m:")) != -1) { 73 switch (ch) { 74 case 'p': 75 preen = 1; 76 break; 77 78 case 'b': 79 skipclean = 0; 80 bflag = argtoi('b', "number", optarg, 10); 81 printf("Alternate super block location: %d\n", bflag); 82 break; 83 84 case 'c': 85 skipclean = 0; 86 cvtlevel = argtoi('c', "conversion level", optarg, 10); 87 if (cvtlevel < 3) 88 errexit("cannot do level %d conversion\n", 89 cvtlevel); 90 break; 91 92 case 'd': 93 debug = 1; 94 break; 95 96 case 'f': 97 skipclean = 0; 98 break; 99 100 case 'm': 101 lfmode = argtoi('m', "mode", optarg, 8); 102 if (lfmode &~ 07777) 103 errexit("bad mode to -m: %o\n", lfmode); 104 printf("** lost+found creation mode %o\n", lfmode); 105 break; 106 107 case 'n': 108 case 'N': 109 nflag = 1; 110 yflag = 0; 111 break; 112 113 case 'y': 114 case 'Y': 115 yflag = 1; 116 nflag = 0; 117 break; 118 119 default: 120 usage(); 121 } 122 } 123 argc -= optind; 124 argv += optind; 125 126 if (argc != 1) 127 usage(); 128 129 if (signal(SIGINT, SIG_IGN) != SIG_IGN) 130 (void)signal(SIGINT, catch); 131 if (preen) 132 (void)signal(SIGQUIT, catchquit); 133 catchinfo(0); 134 135 (void)checkfilesys(blockcheck(*argv), 0, 0L, 0); 136 137 if (returntosingle) 138 ret = 2; 139 140 exit(ret); 141 } 142 143 int 144 argtoi(int flag, char *req, char *str, int base) 145 { 146 char *cp; 147 int ret; 148 149 ret = (int)strtol(str, &cp, base); 150 if (cp == str || *cp) 151 errexit("-%c flag requires a %s\n", flag, req); 152 return (ret); 153 } 154 155 /* 156 * Check the specified filesystem. 157 */ 158 /* ARGSUSED */ 159 int 160 checkfilesys(char *filesys, char *mntpt, long auxdata, int child) 161 { 162 daddr_t n_ffree, n_bfree; 163 struct dups *dp; 164 struct zlncnt *zlnp; 165 int cylno; 166 167 if (preen && child) 168 (void)signal(SIGQUIT, voidquit); 169 setcdevname(filesys, NULL, preen); 170 if (debug && preen) 171 pwarn("starting\n"); 172 173 switch (setup(filesys, 0)) { 174 case 0: 175 if (preen) 176 pfatal("CAN'T CHECK FILE SYSTEM."); 177 /* FALLTHROUGH */ 178 case -1: 179 if (fsreadfd != -1) { 180 (void)close(fsreadfd); 181 fsreadfd = -1; 182 } 183 if (fswritefd != -1) { 184 (void)close(fswritefd); 185 fswritefd = -1; 186 } 187 return (0); 188 } 189 info_filesys = filesys; 190 191 /* 192 * Cleared if any questions answered no. Used to decide if 193 * the superblock should be marked clean. 194 */ 195 resolved = 1; 196 197 /* 198 * 1: scan inodes tallying blocks used 199 */ 200 if (preen == 0) { 201 printf("** Last Mounted on %s\n", sblock.fs_fsmnt); 202 if (hotroot()) 203 printf("** Root file system\n"); 204 printf("** Phase 1 - Check Blocks and Sizes\n"); 205 } 206 pass1(); 207 208 /* 209 * 1b: locate first references to duplicates, if any 210 */ 211 if (duplist) { 212 if (preen || usedsoftdep) 213 pfatal("INTERNAL ERROR: dups with -p"); 214 printf("** Phase 1b - Rescan For More DUPS\n"); 215 pass1b(); 216 } 217 218 /* 219 * 2: traverse directories from root to mark all connected directories 220 */ 221 if (preen == 0) 222 printf("** Phase 2 - Check Pathnames\n"); 223 pass2(); 224 225 /* 226 * 3: scan inodes looking for disconnected directories 227 */ 228 if (preen == 0) 229 printf("** Phase 3 - Check Connectivity\n"); 230 pass3(); 231 232 /* 233 * 4: scan inodes looking for disconnected files; check reference counts 234 */ 235 if (preen == 0) 236 printf("** Phase 4 - Check Reference Counts\n"); 237 pass4(); 238 239 /* 240 * 5: check and repair resource counts in cylinder groups 241 */ 242 if (preen == 0) 243 printf("** Phase 5 - Check Cyl groups\n"); 244 pass5(); 245 246 /* 247 * print out summary statistics 248 */ 249 n_ffree = sblock.fs_cstotal.cs_nffree; 250 n_bfree = sblock.fs_cstotal.cs_nbfree; 251 pwarn("%lld files, %lld used, %lld free ", 252 n_files, (long long)n_blks, 253 (long long)(n_ffree + sblock.fs_frag * n_bfree)); 254 printf("(%lld frags, %lld blocks, %lld.%lld%% fragmentation)\n", 255 (long long)n_ffree, (long long)n_bfree, 256 (long long)((n_ffree * 100) / sblock.fs_dsize), 257 (long long)(((n_ffree * 1000 + sblock.fs_dsize / 2) / 258 sblock.fs_dsize) % 10)); 259 if (debug && 260 (n_files -= maxino - ROOTINO - sblock.fs_cstotal.cs_nifree)) 261 printf("%lld files missing\n", n_files); 262 if (debug) { 263 n_blks += sblock.fs_ncg * 264 (cgdmin(&sblock, 0) - cgsblock(&sblock, 0)); 265 n_blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0); 266 n_blks += howmany(sblock.fs_cssize, sblock.fs_fsize); 267 if (n_blks -= maxfsblock - (n_ffree + sblock.fs_frag * n_bfree)) 268 printf("%lld blocks missing\n", (long long)n_blks); 269 if (duplist != NULL) { 270 printf("The following duplicate blocks remain:"); 271 for (dp = duplist; dp; dp = dp->next) 272 printf(" %lld,", (long long)dp->dup); 273 printf("\n"); 274 } 275 if (zlnhead != NULL) { 276 printf("The following zero link count inodes remain:"); 277 for (zlnp = zlnhead; zlnp; zlnp = zlnp->next) 278 printf(" %llu,", 279 (unsigned long long)zlnp->zlncnt); 280 printf("\n"); 281 } 282 } 283 zlnhead = NULL; 284 duplist = NULL; 285 muldup = NULL; 286 inocleanup(); 287 if (fsmodified) { 288 sblock.fs_time = (time_t)time(NULL); 289 sbdirty(); 290 } 291 if (cvtlevel && sblk.b_dirty) { 292 /* 293 * Write out the duplicate super blocks 294 */ 295 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 296 bwrite(fswritefd, (char *)&sblock, 297 fsbtodb(&sblock, cgsblock(&sblock, cylno)), SBSIZE); 298 } 299 if (rerun) 300 resolved = 0; 301 ckfini(resolved); /* Don't mark fs clean if fsck needs to be re-run */ 302 303 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 304 free(inostathead[cylno].il_stat); 305 free(inostathead); 306 inostathead = NULL; 307 308 free(blockmap); 309 blockmap = NULL; 310 free(sblock.fs_csp); 311 free(sblk.b_un.b_buf); 312 free(asblk.b_un.b_buf); 313 314 if (!fsmodified) 315 return (0); 316 if (!preen) 317 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 318 if (rerun || !resolved) 319 printf("\n***** PLEASE RERUN FSCK *****\n"); 320 if (hotroot()) { 321 struct statfs stfs_buf; 322 /* 323 * We modified the root. Do a mount update on 324 * it, unless it is read-write, so we can continue. 325 */ 326 if (statfs("/", &stfs_buf) == 0) { 327 long flags = stfs_buf.f_flags; 328 struct ufs_args args; 329 int ret; 330 331 if (flags & MNT_RDONLY) { 332 args.fspec = 0; 333 args.export_info.ex_flags = 0; 334 args.export_info.ex_root = 0; 335 flags |= MNT_UPDATE | MNT_RELOAD; 336 ret = mount(MOUNT_FFS, "/", flags, &args); 337 if (ret == 0) 338 return(0); 339 } 340 } 341 if (!preen) 342 printf("\n***** REBOOT NOW *****\n"); 343 sync(); 344 return (4); 345 } 346 return (0); 347 } 348