1 /* $OpenBSD: main.c,v 1.33 2008/06/10 23:10:29 otto 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 #ifndef lint 34 static const char copyright[] = 35 "@(#) Copyright (c) 1980, 1986, 1993\n\ 36 The Regents of the University of California. All rights reserved.\n"; 37 #endif /* not lint */ 38 39 #ifndef lint 40 #if 0 41 static char sccsid[] = "@(#)main.c 8.2 (Berkeley) 1/23/94"; 42 #else 43 static const char rcsid[] = "$OpenBSD: main.c,v 1.33 2008/06/10 23:10:29 otto Exp $"; 44 #endif 45 #endif /* not lint */ 46 47 #include <sys/param.h> 48 #include <sys/time.h> 49 #include <sys/mount.h> 50 #include <ufs/ufs/dinode.h> 51 #include <ufs/ffs/fs.h> 52 #include <fstab.h> 53 #include <stdlib.h> 54 #include <string.h> 55 #include <ctype.h> 56 #include <stdio.h> 57 #include <unistd.h> 58 59 #include "fsck.h" 60 #include "extern.h" 61 #include "fsutil.h" 62 63 volatile sig_atomic_t returntosingle; 64 65 int argtoi(int, char *, char *, int); 66 int checkfilesys(char *, char *, long, int); 67 int docheck(struct fstab *); 68 int main(int, char *[]); 69 70 extern char *__progname; 71 72 int 73 main(int argc, char *argv[]) 74 { 75 int ch; 76 int ret = 0; 77 78 sync(); 79 skipclean = 1; 80 while ((ch = getopt(argc, argv, "dfpnNyYb:c:m:")) != -1) { 81 switch (ch) { 82 case 'p': 83 preen++; 84 break; 85 86 case 'b': 87 skipclean = 0; 88 bflag = argtoi('b', "number", optarg, 10); 89 printf("Alternate super block location: %d\n", bflag); 90 break; 91 92 case 'c': 93 skipclean = 0; 94 cvtlevel = argtoi('c', "conversion level", optarg, 10); 95 break; 96 97 case 'd': 98 debug++; 99 break; 100 101 case 'f': 102 skipclean = 0; 103 break; 104 105 case 'm': 106 lfmode = argtoi('m', "mode", optarg, 8); 107 if (lfmode &~ 07777) 108 errexit("bad mode to -m: %o\n", lfmode); 109 printf("** lost+found creation mode %o\n", lfmode); 110 break; 111 112 case 'n': 113 case 'N': 114 nflag++; 115 yflag = 0; 116 break; 117 118 case 'y': 119 case 'Y': 120 yflag++; 121 nflag = 0; 122 break; 123 124 default: 125 errexit("usage: %s [-fnpy] [-b block#] [-c level] " 126 "[-m mode] filesystem ...\n", __progname); 127 } 128 } 129 argc -= optind; 130 argv += optind; 131 if (signal(SIGINT, SIG_IGN) != SIG_IGN) 132 (void)signal(SIGINT, catch); 133 if (preen) 134 (void)signal(SIGQUIT, catchquit); 135 (void)signal(SIGINFO, catchinfo); 136 137 if (argc) 138 while (argc-- > 0) 139 (void)checkfilesys(blockcheck(*argv++), 0, 0L, 0); 140 141 if (returntosingle) 142 ret = 2; 143 144 exit(ret); 145 } 146 147 int 148 argtoi(int flag, char *req, char *str, int base) 149 { 150 char *cp; 151 int ret; 152 153 ret = (int)strtol(str, &cp, base); 154 if (cp == str || *cp) 155 errexit("-%c flag requires a %s\n", flag, req); 156 return (ret); 157 } 158 159 /* 160 * Determine whether a filesystem should be checked. 161 */ 162 int 163 docheck(struct fstab *fsp) 164 { 165 166 if ((strcmp(fsp->fs_vfstype, "ufs") && 167 strcmp(fsp->fs_vfstype, "ffs")) || 168 (strcmp(fsp->fs_type, FSTAB_RW) && 169 strcmp(fsp->fs_type, FSTAB_RO)) || 170 fsp->fs_passno == 0) 171 return (0); 172 return (1); 173 } 174 175 /* 176 * Check the specified filesystem. 177 */ 178 /* ARGSUSED */ 179 int 180 checkfilesys(char *filesys, char *mntpt, long auxdata, int child) 181 { 182 daddr64_t n_ffree, n_bfree; 183 struct dups *dp; 184 struct zlncnt *zlnp; 185 int cylno; 186 187 if (preen && child) 188 (void)signal(SIGQUIT, voidquit); 189 setcdevname(filesys, preen); 190 if (debug && preen) 191 pwarn("starting\n"); 192 switch (setup(filesys)) { 193 case 0: 194 if (preen) 195 pfatal("CAN'T CHECK FILE SYSTEM."); 196 /* FALLTHROUGH */ 197 case -1: 198 if (fsreadfd != -1) { 199 (void)close(fsreadfd); 200 fsreadfd = -1; 201 } 202 if (fswritefd != -1) { 203 (void)close(fswritefd); 204 fswritefd = -1; 205 } 206 return (0); 207 } 208 info_filesys = filesys; 209 210 /* 211 * Cleared if any questions answered no. Used to decide if 212 * the superblock should be marked clean. 213 */ 214 resolved = 1; 215 216 /* 217 * 1: scan inodes tallying blocks used 218 */ 219 if (preen == 0) { 220 printf("** Last Mounted on %s\n", sblock.fs_fsmnt); 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 || usedsoftdep) 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_ffree = sblock.fs_cstotal.cs_nffree; 269 n_bfree = sblock.fs_cstotal.cs_nbfree; 270 pwarn("%lld files, %lld used, %lld free ", 271 n_files, n_blks, n_ffree + sblock.fs_frag * n_bfree); 272 printf("(%lld frags, %lld blocks, %lld.%lld%% fragmentation)\n", 273 n_ffree, n_bfree, (n_ffree * 100) / sblock.fs_dsize, 274 ((n_ffree * 1000 + sblock.fs_dsize / 2) / sblock.fs_dsize) % 10); 275 if (debug && 276 (n_files -= maxino - ROOTINO - sblock.fs_cstotal.cs_nifree)) 277 printf("%lld files missing\n", n_files); 278 if (debug) { 279 n_blks += sblock.fs_ncg * 280 (cgdmin(&sblock, 0) - cgsblock(&sblock, 0)); 281 n_blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0); 282 n_blks += howmany(sblock.fs_cssize, sblock.fs_fsize); 283 if (n_blks -= maxfsblock - (n_ffree + sblock.fs_frag * n_bfree)) 284 printf("%lld blocks missing\n", n_blks); 285 if (duplist != NULL) { 286 printf("The following duplicate blocks remain:"); 287 for (dp = duplist; dp; dp = dp->next) 288 printf(" %lld,", dp->dup); 289 printf("\n"); 290 } 291 if (zlnhead != NULL) { 292 printf("The following zero link count inodes remain:"); 293 for (zlnp = zlnhead; zlnp; zlnp = zlnp->next) 294 printf(" %u,", zlnp->zlncnt); 295 printf("\n"); 296 } 297 } 298 zlnhead = NULL; 299 duplist = NULL; 300 muldup = NULL; 301 inocleanup(); 302 if (fsmodified) { 303 sblock.fs_time = (time_t)time(NULL); 304 sbdirty(); 305 } 306 if (cvtlevel && sblk.b_dirty) { 307 /* 308 * Write out the duplicate super blocks 309 */ 310 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 311 bwrite(fswritefd, (char *)&sblock, 312 fsbtodb(&sblock, cgsblock(&sblock, cylno)), SBSIZE); 313 } 314 if (rerun) 315 resolved = 0; 316 ckfini(resolved); /* Don't mark fs clean if fsck needs to be re-run */ 317 free(blockmap); 318 blockmap = NULL; 319 free(stmap); 320 stmap = NULL; 321 free(lncntp); 322 lncntp = NULL; 323 free(sblock.fs_csp); 324 free(sblk.b_un.b_buf); 325 free(asblk.b_un.b_buf); 326 327 if (!fsmodified) 328 return (0); 329 if (!preen) 330 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 331 if (rerun || !resolved) 332 printf("\n***** PLEASE RERUN FSCK *****\n"); 333 if (hotroot()) { 334 struct statfs stfs_buf; 335 /* 336 * We modified the root. Do a mount update on 337 * it, unless it is read-write, so we can continue. 338 */ 339 if (statfs("/", &stfs_buf) == 0) { 340 long flags = stfs_buf.f_flags; 341 struct ufs_args args; 342 int ret; 343 344 if (flags & MNT_RDONLY) { 345 args.fspec = 0; 346 args.export_info.ex_flags = 0; 347 args.export_info.ex_root = 0; 348 flags |= MNT_UPDATE | MNT_RELOAD; 349 ret = mount(MOUNT_FFS, "/", flags, &args); 350 if (ret == 0) 351 return(0); 352 } 353 } 354 if (!preen) 355 printf("\n***** REBOOT NOW *****\n"); 356 sync(); 357 return (4); 358 } 359 return (0); 360 } 361