main.c revision 37000
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 41#if 0 42static char sccsid[] = "@(#)main.c 8.6 (Berkeley) 5/14/95"; 43#endif 44static const char rcsid[] = 45 "$Id: main.c,v 1.13 1998/03/08 09:55:26 julian Exp $"; 46#endif /* not lint */ 47 48#include <sys/param.h> 49#include <sys/time.h> 50#include <sys/mount.h> 51 52#include <ufs/ufs/dinode.h> 53#include <ufs/ufs/ufsmount.h> 54#include <ufs/ffs/fs.h> 55 56#include <err.h> 57#include <fstab.h> 58 59#include "fsck.h" 60 61int returntosingle; 62 63static int argtoi __P((int flag, char *req, char *str, int base)); 64static int docheck __P((struct fstab *fsp)); 65static int checkfilesys __P((char *filesys, char *mntpt, long auxdata, 66 int child)); 67int main __P((int argc, char *argv[])); 68 69int 70main(argc, argv) 71 int argc; 72 char *argv[]; 73{ 74 int ch; 75 int ret, maxrun = 0; 76 77 sync(); 78 while ((ch = getopt(argc, argv, "dfpnNyYb:c:l:m:")) != -1) { 79 switch (ch) { 80 case 'p': 81 preen++; 82 break; 83 84 case 'b': 85 bflag = argtoi('b', "number", optarg, 10); 86 printf("Alternate super block location: %d\n", bflag); 87 break; 88 89 case 'c': 90 cvtlevel = argtoi('c', "conversion level", optarg, 10); 91 break; 92 93 case 'd': 94 debug++; 95 break; 96 97 case 'f': 98 fflag++; 99 break; 100 101 case 'l': 102 maxrun = argtoi('l', "number", optarg, 10); 103 break; 104 105 case 'm': 106 lfmode = argtoi('m', "mode", optarg, 8); 107 if (lfmode &~ 07777) 108 errx(EEXIT, "bad mode to -m: %o", 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 errx(EEXIT, "%c option?", ch); 126 } 127 } 128 argc -= optind; 129 argv += optind; 130 if (signal(SIGINT, SIG_IGN) != SIG_IGN) 131 (void)signal(SIGINT, catch); 132 if (preen) 133 (void)signal(SIGQUIT, catchquit); 134 if (argc) { 135 while (argc-- > 0) 136 (void)checkfilesys(blockcheck(*argv++), 0, 0L, 0); 137 exit(0); 138 } 139 ret = checkfstab(preen, maxrun, docheck, checkfilesys); 140 if (returntosingle) 141 exit(2); 142 exit(ret); 143} 144 145static int 146argtoi(flag, req, str, base) 147 int flag; 148 char *req, *str; 149 int base; 150{ 151 char *cp; 152 int ret; 153 154 ret = (int)strtol(str, &cp, base); 155 if (cp == str || *cp) 156 errx(EEXIT, "-%c flag requires a %s", flag, req); 157 return (ret); 158} 159 160/* 161 * Determine whether a filesystem should be checked. 162 */ 163static int 164docheck(fsp) 165 register struct fstab *fsp; 166{ 167 168 if (strcmp(fsp->fs_vfstype, "ufs") || 169 (strcmp(fsp->fs_type, FSTAB_RW) && 170 strcmp(fsp->fs_type, FSTAB_RO)) || 171 fsp->fs_passno == 0) 172 return (0); 173 return (1); 174} 175 176/* 177 * Check the specified filesystem. 178 */ 179/* ARGSUSED */ 180static int 181checkfilesys(filesys, mntpt, auxdata, child) 182 char *filesys, *mntpt; 183 long auxdata; 184 int child; 185{ 186 ufs_daddr_t n_ffree, n_bfree; 187 struct dups *dp; 188 struct zlncnt *zlnp; 189 int cylno, flags; 190 191 if (preen && child) 192 (void)signal(SIGQUIT, voidquit); 193 cdevname = filesys; 194 if (debug && preen) 195 pwarn("starting\n"); 196 switch (setup(filesys)) { 197 case 0: 198 if (preen) 199 pfatal("CAN'T CHECK FILE SYSTEM."); 200 return (0); 201 case -1: 202 pwarn("clean, %ld free ", sblock.fs_cstotal.cs_nffree + 203 sblock.fs_frag * sblock.fs_cstotal.cs_nbfree); 204 printf("(%d frags, %d blocks, %.1f%% fragmentation)\n", 205 sblock.fs_cstotal.cs_nffree, sblock.fs_cstotal.cs_nbfree, 206 sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize); 207 return (0); 208 } 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 * 1: scan inodes tallying blocks used 217 */ 218 if (preen == 0) { 219 printf("** Last Mounted on %s\n", sblock.fs_fsmnt); 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 || usedsoftdep) 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_ffree = sblock.fs_cstotal.cs_nffree; 268 n_bfree = sblock.fs_cstotal.cs_nbfree; 269 pwarn("%ld files, %ld used, %ld free ", 270 n_files, n_blks, n_ffree + sblock.fs_frag * n_bfree); 271 printf("(%d frags, %d blocks, %.1f%% fragmentation)\n", 272 n_ffree, n_bfree, n_ffree * 100.0 / sblock.fs_dsize); 273 if (debug && 274 (n_files -= maxino - ROOTINO - sblock.fs_cstotal.cs_nifree)) 275 printf("%d files missing\n", n_files); 276 if (debug) { 277 n_blks += sblock.fs_ncg * 278 (cgdmin(&sblock, 0) - cgsblock(&sblock, 0)); 279 n_blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0); 280 n_blks += howmany(sblock.fs_cssize, sblock.fs_fsize); 281 if (n_blks -= maxfsblock - (n_ffree + sblock.fs_frag * n_bfree)) 282 printf("%d blocks missing\n", n_blks); 283 if (duplist != NULL) { 284 printf("The following duplicate blocks remain:"); 285 for (dp = duplist; dp; dp = dp->next) 286 printf(" %d,", dp->dup); 287 printf("\n"); 288 } 289 if (zlnhead != NULL) { 290 printf("The following zero link count inodes remain:"); 291 for (zlnp = zlnhead; zlnp; zlnp = zlnp->next) 292 printf(" %u,", zlnp->zlncnt); 293 printf("\n"); 294 } 295 } 296 zlnhead = (struct zlncnt *)0; 297 duplist = (struct dups *)0; 298 muldup = (struct dups *)0; 299 inocleanup(); 300 if (fsmodified) { 301 (void)time(&sblock.fs_time); 302 sbdirty(); 303 } 304 if (cvtlevel && sblk.b_dirty) { 305 /* 306 * Write out the duplicate super blocks 307 */ 308 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 309 bwrite(fswritefd, (char *)&sblock, 310 fsbtodb(&sblock, cgsblock(&sblock, cylno)), SBSIZE); 311 } 312 if (rerun) 313 resolved = 0; 314 flags = 0; 315 if (hotroot) { 316 struct statfs stfs_buf; 317 /* 318 * Check to see if root is mounted read-write. 319 */ 320 if (statfs("/", &stfs_buf) == 0) 321 flags = stfs_buf.f_flags; 322 if ((flags & MNT_RDONLY) == 0) 323 resolved = 0; 324 } 325 ckfini(resolved); 326 free(blockmap); 327 free(statemap); 328 free((char *)lncntp); 329 if (!fsmodified) 330 return (0); 331 if (!preen) 332 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 333 if (rerun) 334 printf("\n***** PLEASE RERUN FSCK *****\n"); 335 if (hotroot) { 336 struct ufs_args args; 337 int ret; 338 /* 339 * We modified the root. Do a mount update on 340 * it, unless it is read-write, so we can continue. 341 */ 342 if (flags & MNT_RDONLY) { 343 args.fspec = 0; 344 args.export.ex_flags = 0; 345 args.export.ex_root = 0; 346 flags |= MNT_UPDATE | MNT_RELOAD; 347 ret = mount("ufs", "/", flags, &args); 348 if (ret == 0) 349 return (0); 350 } 351 if (!preen) 352 printf("\n***** REBOOT NOW *****\n"); 353 sync(); 354 return (4); 355 } 356 return (0); 357} 358