main.c revision 41474
1/* 2 * Copyright (c) 1980, 1986, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. 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#ifndef lint 35static const char copyright[] = 36"@(#) Copyright (c) 1980, 1986, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38#endif /* not lint */ 39 40#ifndef lint 41static const char sccsid[] = "@(#)main.c 8.6 (Berkeley) 5/14/95"; 42#endif /* not lint */ 43 44#include <sys/param.h> 45#include <sys/time.h> 46#include <sys/mount.h> 47#include <sys/resource.h> 48 49#include <ufs/ufs/dinode.h> 50#include <ufs/ufs/ufsmount.h> 51#include <ufs/ffs/fs.h> 52 53#include <err.h> 54#include <fstab.h> 55#include <string.h> 56 57#include "fsck.h" 58 59static int argtoi __P((int flag, char *req, char *str, int base)); 60static int docheck __P((struct fstab *fsp)); 61static int checkfilesys __P((char *filesys, char *mntpt, long auxdata, 62 int child)); 63int main __P((int argc, char *argv[])); 64 65int 66main(argc, argv) 67 int argc; 68 char *argv[]; 69{ 70 int ch; 71 int ret, maxrun = 0; 72 struct rlimit rlimit; 73 74 sync(); 75 while ((ch = getopt(argc, argv, "dfpnNyYb:c:l:m:")) != -1) { 76 switch (ch) { 77 case 'p': 78 preen++; 79 break; 80 81 case 'b': 82 bflag = argtoi('b', "number", optarg, 10); 83 printf("Alternate super block location: %d\n", bflag); 84 break; 85 86 case 'c': 87 cvtlevel = argtoi('c', "conversion level", optarg, 10); 88 break; 89 90 case 'd': 91 debug++; 92 break; 93 94 case 'f': 95 fflag++; 96 break; 97 98 case 'l': 99 maxrun = argtoi('l', "number", optarg, 10); 100 break; 101 102 case 'm': 103 lfmode = argtoi('m', "mode", optarg, 8); 104 if (lfmode &~ 07777) 105 errx(EEXIT, "bad mode to -m: %o", lfmode); 106 printf("** lost+found creation mode %o\n", lfmode); 107 break; 108 109 case 'n': 110 case 'N': 111 nflag++; 112 yflag = 0; 113 break; 114 115 case 'y': 116 case 'Y': 117 yflag++; 118 nflag = 0; 119 break; 120 121 default: 122 errx(EEXIT, "%c option?", ch); 123 } 124 } 125 argc -= optind; 126 argv += optind; 127 if (signal(SIGINT, SIG_IGN) != SIG_IGN) 128 (void)signal(SIGINT, catch); 129 if (preen) 130 (void)signal(SIGQUIT, catchquit); 131 /* 132 * Push up our allowed memory limit so we can cope 133 * with huge filesystems. 134 */ 135 if (getrlimit(RLIMIT_DATA, &rlimit) == 0) { 136 rlimit.rlim_cur = rlimit.rlim_max; 137 (void)setrlimit(RLIMIT_DATA, &rlimit); 138 } 139 if (argc) { 140 while (argc-- > 0) { 141 char *path = blockcheck(*argv); 142 143 if (path == NULL) 144 pfatal("Can't check %s\n", *argv); 145 else 146 (void)checkfilesys(path, 0, 0L, 0); 147 ++argv; 148 } 149 exit(0); 150 } 151 ret = checkfstab(preen, maxrun, docheck, checkfilesys); 152 if (returntosingle) 153 exit(2); 154 exit(ret); 155} 156 157static int 158argtoi(flag, req, str, base) 159 int flag; 160 char *req, *str; 161 int base; 162{ 163 char *cp; 164 int ret; 165 166 ret = (int)strtol(str, &cp, base); 167 if (cp == str || *cp) 168 errx(EEXIT, "-%c flag requires a %s", flag, req); 169 return (ret); 170} 171 172/* 173 * Determine whether a filesystem should be checked. 174 */ 175static int 176docheck(fsp) 177 register struct fstab *fsp; 178{ 179 180 if (strcmp(fsp->fs_vfstype, "ufs") || 181 (strcmp(fsp->fs_type, FSTAB_RW) && 182 strcmp(fsp->fs_type, FSTAB_RO)) || 183 fsp->fs_passno == 0) 184 return (0); 185 return (1); 186} 187 188/* 189 * Check the specified filesystem. 190 */ 191/* ARGSUSED */ 192static int 193checkfilesys(filesys, mntpt, auxdata, child) 194 char *filesys, *mntpt; 195 long auxdata; 196 int child; 197{ 198 ufs_daddr_t n_ffree, n_bfree; 199 struct dups *dp; 200 struct zlncnt *zlnp; 201 int cylno, flags; 202 203 if (preen && child) 204 (void)signal(SIGQUIT, voidquit); 205 cdevname = filesys; 206 if (debug && preen) 207 pwarn("starting\n"); 208 switch (setup(filesys)) { 209 case 0: 210 if (preen) 211 pfatal("CAN'T CHECK FILE SYSTEM."); 212 /* fall through */ 213 case -1: 214 return (0); 215 } 216 /* 217 * Cleared if any questions answered no. Used to decide if 218 * the superblock should be marked clean. 219 */ 220 resolved = 1; 221 /* 222 * 1: scan inodes tallying blocks used 223 */ 224 if (preen == 0) { 225 printf("** Last Mounted on %s\n", sblock.fs_fsmnt); 226 if (hotroot) 227 printf("** Root file system\n"); 228 printf("** Phase 1 - Check Blocks and Sizes\n"); 229 } 230 pass1(); 231 232 /* 233 * 1b: locate first references to duplicates, if any 234 */ 235 if (duplist) { 236 if (preen || usedsoftdep) 237 pfatal("INTERNAL ERROR: dups with -p"); 238 printf("** Phase 1b - Rescan For More DUPS\n"); 239 pass1b(); 240 } 241 242 /* 243 * 2: traverse directories from root to mark all connected directories 244 */ 245 if (preen == 0) 246 printf("** Phase 2 - Check Pathnames\n"); 247 pass2(); 248 249 /* 250 * 3: scan inodes looking for disconnected directories 251 */ 252 if (preen == 0) 253 printf("** Phase 3 - Check Connectivity\n"); 254 pass3(); 255 256 /* 257 * 4: scan inodes looking for disconnected files; check reference counts 258 */ 259 if (preen == 0) 260 printf("** Phase 4 - Check Reference Counts\n"); 261 pass4(); 262 263 /* 264 * 5: check and repair resource counts in cylinder groups 265 */ 266 if (preen == 0) 267 printf("** Phase 5 - Check Cyl groups\n"); 268 pass5(); 269 270 /* 271 * print out summary statistics 272 */ 273 n_ffree = sblock.fs_cstotal.cs_nffree; 274 n_bfree = sblock.fs_cstotal.cs_nbfree; 275 pwarn("%ld files, %ld used, %ld free ", 276 n_files, n_blks, n_ffree + sblock.fs_frag * n_bfree); 277 printf("(%d frags, %d blocks, %.1f%% fragmentation)\n", 278 n_ffree, n_bfree, n_ffree * 100.0 / sblock.fs_dsize); 279 if (debug && 280 (n_files -= maxino - ROOTINO - sblock.fs_cstotal.cs_nifree)) 281 printf("%d files missing\n", n_files); 282 if (debug) { 283 n_blks += sblock.fs_ncg * 284 (cgdmin(&sblock, 0) - cgsblock(&sblock, 0)); 285 n_blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0); 286 n_blks += howmany(sblock.fs_cssize, sblock.fs_fsize); 287 if (n_blks -= maxfsblock - (n_ffree + sblock.fs_frag * n_bfree)) 288 printf("%d blocks missing\n", n_blks); 289 if (duplist != NULL) { 290 printf("The following duplicate blocks remain:"); 291 for (dp = duplist; dp; dp = dp->next) 292 printf(" %d,", dp->dup); 293 printf("\n"); 294 } 295 if (zlnhead != NULL) { 296 printf("The following zero link count inodes remain:"); 297 for (zlnp = zlnhead; zlnp; zlnp = zlnp->next) 298 printf(" %u,", zlnp->zlncnt); 299 printf("\n"); 300 } 301 } 302 zlnhead = (struct zlncnt *)0; 303 duplist = (struct dups *)0; 304 muldup = (struct dups *)0; 305 inocleanup(); 306 if (fsmodified) { 307 sblock.fs_time = time(NULL); 308 sbdirty(); 309 } 310 if (cvtlevel && sblk.b_dirty) { 311 /* 312 * Write out the duplicate super blocks 313 */ 314 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 315 bwrite(fswritefd, (char *)&sblock, 316 fsbtodb(&sblock, cgsblock(&sblock, cylno)), SBSIZE); 317 } 318 if (rerun) 319 resolved = 0; 320 flags = 0; 321 if (hotroot) { 322 struct statfs stfs_buf; 323 /* 324 * Check to see if root is mounted read-write. 325 */ 326 if (statfs("/", &stfs_buf) == 0) 327 flags = stfs_buf.f_flags; 328 if ((flags & MNT_RDONLY) == 0) 329 resolved = 0; 330 } 331 ckfini(resolved); 332 333 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 334 if (inostathead[cylno].il_stat != NULL) 335 free((char *)inostathead[cylno].il_stat); 336 free((char *)inostathead); 337 inostathead = NULL; 338 if (fsmodified && !preen) 339 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 340 if (rerun) 341 printf("\n***** PLEASE RERUN FSCK *****\n"); 342 if (hotroot) { 343 struct ufs_args args; 344 int ret; 345 /* 346 * We modified the root. Do a mount update on 347 * it, unless it is read-write, so we can continue. 348 */ 349 if (flags & MNT_RDONLY) { 350 args.fspec = 0; 351 args.export.ex_flags = 0; 352 args.export.ex_root = 0; 353 flags |= MNT_UPDATE | MNT_RELOAD; 354 ret = mount("ufs", "/", flags, &args); 355 if (ret == 0) 356 return (0); 357 } 358 if (!fsmodified) 359 return (0); 360 if (!preen) 361 printf("\n***** REBOOT NOW *****\n"); 362 sync(); 363 return (4); 364 } 365 return (0); 366} 367