1 /* $OpenBSD: main.c,v 1.18 2011/03/12 17:50:47 deraadt 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/param.h> 35 #include <sys/time.h> 36 #include <sys/mount.h> 37 #include <ufs/ext2fs/ext2fs_dinode.h> 38 #include <ufs/ext2fs/ext2fs.h> 39 #include <fstab.h> 40 #include <stdlib.h> 41 #include <string.h> 42 #include <ctype.h> 43 #include <stdio.h> 44 #include <time.h> 45 #include <unistd.h> 46 47 #include "fsck.h" 48 #include "extern.h" 49 #include "fsutil.h" 50 51 volatile sig_atomic_t returntosingle; 52 53 int main(int, char *[]); 54 55 static int argtoi(int, char *, char *, int); 56 static int checkfilesys(char *, char *, long, int); 57 static void usage(void); 58 59 60 int 61 main(int argc, char *argv[]) 62 { 63 int ch; 64 int ret = 0; 65 66 sync(); 67 skipclean = 1; 68 while ((ch = getopt(argc, argv, "b:dfm:npy")) != -1) { 69 switch (ch) { 70 case 'b': 71 skipclean = 0; 72 bflag = argtoi('b', "number", optarg, 10); 73 printf("Alternate super block location: %d\n", bflag); 74 break; 75 76 case 'd': 77 debug++; 78 break; 79 80 case 'f': 81 skipclean = 0; 82 break; 83 84 case 'm': 85 lfmode = argtoi('m', "mode", optarg, 8); 86 if (lfmode &~ 07777) 87 errexit("bad mode to -m: %o\n", lfmode); 88 printf("** lost+found creation mode %o\n", lfmode); 89 break; 90 91 case 'n': 92 nflag++; 93 yflag = 0; 94 break; 95 96 case 'p': 97 preen++; 98 break; 99 100 case 'y': 101 yflag++; 102 nflag = 0; 103 break; 104 105 default: 106 usage(); 107 } 108 } 109 110 argc -= optind; 111 argv += optind; 112 113 if (!argc) 114 usage(); 115 116 if (signal(SIGINT, SIG_IGN) != SIG_IGN) 117 (void)signal(SIGINT, catch); 118 if (preen) 119 (void)signal(SIGQUIT, catchquit); 120 121 while (argc-- > 0) 122 (void)checkfilesys(blockcheck(*argv++), 0, 0L, 0); 123 124 if (returntosingle) 125 ret = 2; 126 127 exit(ret); 128 } 129 130 static int 131 argtoi(int flag, char *req, char *str, int base) 132 { 133 char *cp; 134 int ret; 135 136 ret = (int)strtol(str, &cp, base); 137 if (cp == str || *cp) 138 errexit("-%c flag requires a %s\n", flag, req); 139 return (ret); 140 } 141 142 /* 143 * Check the specified filesystem. 144 */ 145 /* ARGSUSED */ 146 static int 147 checkfilesys(char *filesys, char *mntpt, long auxdata, int child) 148 { 149 daddr32_t n_bfree; 150 struct dups *dp; 151 struct zlncnt *zlnp; 152 int i; 153 154 if (preen && child) 155 (void)signal(SIGQUIT, voidquit); 156 setcdevname(filesys, NULL, preen); 157 if (debug && preen) 158 pwarn("starting\n"); 159 switch (setup(filesys)) { 160 case 0: 161 if (preen) 162 pfatal("CAN'T CHECK FILE SYSTEM."); 163 case -1: 164 return (0); 165 } 166 /* 167 * 1: scan inodes tallying blocks used 168 */ 169 if (preen == 0) { 170 if (sblock.e2fs.e2fs_rev > E2FS_REV0) { 171 printf("** Last Mounted on %s\n", 172 sblock.e2fs.e2fs_fsmnt); 173 } 174 if (hotroot()) 175 printf("** Root file system\n"); 176 printf("** Phase 1 - Check Blocks and Sizes\n"); 177 } 178 pass1(); 179 180 /* 181 * 1b: locate first references to duplicates, if any 182 */ 183 if (duplist) { 184 if (preen) 185 pfatal("INTERNAL ERROR: dups with -p"); 186 printf("** Phase 1b - Rescan For More DUPS\n"); 187 pass1b(); 188 } 189 190 /* 191 * 2: traverse directories from root to mark all connected directories 192 */ 193 if (preen == 0) 194 printf("** Phase 2 - Check Pathnames\n"); 195 pass2(); 196 197 /* 198 * 3: scan inodes looking for disconnected directories 199 */ 200 if (preen == 0) 201 printf("** Phase 3 - Check Connectivity\n"); 202 pass3(); 203 204 /* 205 * 4: scan inodes looking for disconnected files; check reference counts 206 */ 207 if (preen == 0) 208 printf("** Phase 4 - Check Reference Counts\n"); 209 pass4(); 210 211 /* 212 * 5: check and repair resource counts in cylinder groups 213 */ 214 if (preen == 0) 215 printf("** Phase 5 - Check Cyl groups\n"); 216 pass5(); 217 218 /* 219 * print out summary statistics 220 */ 221 n_bfree = sblock.e2fs.e2fs_fbcount; 222 223 pwarn("%d files, %d used, %d free\n", 224 n_files, n_blks, n_bfree); 225 if (debug && 226 /* 9 reserved and unused inodes in FS */ 227 (n_files -= maxino - 9 - sblock.e2fs.e2fs_ficount)) 228 printf("%d files missing\n", n_files); 229 if (debug) { 230 for (i = 0; i < sblock.e2fs_ncg; i++) 231 n_blks += cgoverhead(i); 232 n_blks += sblock.e2fs.e2fs_first_dblock; 233 if (n_blks -= maxfsblock - n_bfree) 234 printf("%d blocks missing\n", n_blks); 235 if (duplist != NULL) { 236 printf("The following duplicate blocks remain:"); 237 for (dp = duplist; dp; dp = dp->next) 238 printf(" %d,", dp->dup); 239 printf("\n"); 240 } 241 if (zlnhead != NULL) { 242 printf("The following zero link count inodes remain:"); 243 for (zlnp = zlnhead; zlnp; zlnp = zlnp->next) 244 printf(" %u,", zlnp->zlncnt); 245 printf("\n"); 246 } 247 } 248 zlnhead = (struct zlncnt *)0; 249 duplist = (struct dups *)0; 250 muldup = (struct dups *)0; 251 inocleanup(); 252 if (fsmodified) { 253 time_t t; 254 (void)time(&t); 255 sblock.e2fs.e2fs_wtime = t; 256 sblock.e2fs.e2fs_lastfsck = t; 257 sbdirty(); 258 } 259 ckfini(1); 260 free(blockmap); 261 free(statemap); 262 free((char *)lncntp); 263 if (!fsmodified) 264 return (0); 265 if (!preen) 266 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 267 if (rerun) 268 printf("\n***** PLEASE RERUN FSCK *****\n"); 269 if (hotroot()) { 270 struct statfs stfs_buf; 271 /* 272 * We modified the root. Do a mount update on 273 * it, unless it is read-write, so we can continue. 274 */ 275 if (statfs("/", &stfs_buf) == 0) { 276 long flags = stfs_buf.f_flags; 277 struct ufs_args args; 278 int ret; 279 280 if (flags & MNT_RDONLY) { 281 args.fspec = 0; 282 args.export_info.ex_flags = 0; 283 args.export_info.ex_root = 0; 284 flags |= MNT_UPDATE | MNT_RELOAD; 285 ret = mount(MOUNT_EXT2FS, "/", flags, &args); 286 if (ret == 0) 287 return(0); 288 } 289 } 290 if (!preen) 291 printf("\n***** REBOOT NOW *****\n"); 292 sync(); 293 return (4); 294 } 295 return (0); 296 } 297 298 static void 299 usage(void) 300 { 301 extern char *__progname; 302 303 (void) fprintf(stderr, 304 "usage: %s [-dfnpy] [-b block#] [-m mode] filesystem ...\n", 305 __progname); 306 exit(1); 307 } 308 309