1 /* $OpenBSD: main.c,v 1.22 2015/02/07 02:09:13 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/types.h> 35 #include <sys/signal.h> 36 #include <sys/time.h> 37 #include <sys/mount.h> 38 #include <ufs/ext2fs/ext2fs_dinode.h> 39 #include <ufs/ext2fs/ext2fs.h> 40 #include <fstab.h> 41 #include <stdlib.h> 42 #include <string.h> 43 #include <ctype.h> 44 #include <stdio.h> 45 #include <time.h> 46 #include <unistd.h> 47 48 #include "fsck.h" 49 #include "extern.h" 50 #include "fsutil.h" 51 52 volatile sig_atomic_t returntosingle; 53 54 int main(int, char *[]); 55 56 static int argtoi(int, char *, char *, int); 57 static int checkfilesys(char *, char *, long, int); 58 static void usage(void); 59 60 61 int 62 main(int argc, char *argv[]) 63 { 64 int ch; 65 int ret = 0; 66 67 sync(); 68 skipclean = 1; 69 while ((ch = getopt(argc, argv, "b:dfm:npy")) != -1) { 70 switch (ch) { 71 case 'b': 72 skipclean = 0; 73 bflag = argtoi('b', "number", optarg, 10); 74 printf("Alternate super block location: %d\n", bflag); 75 break; 76 77 case 'd': 78 debug = 1; 79 break; 80 81 case 'f': 82 skipclean = 0; 83 break; 84 85 case 'm': 86 lfmode = argtoi('m', "mode", optarg, 8); 87 if (lfmode &~ 07777) 88 errexit("bad mode to -m: %o\n", lfmode); 89 printf("** lost+found creation mode %o\n", lfmode); 90 break; 91 92 case 'n': 93 nflag = 1; 94 yflag = 0; 95 break; 96 97 case 'p': 98 preen = 1; 99 break; 100 101 case 'y': 102 yflag = 1; 103 nflag = 0; 104 break; 105 106 default: 107 usage(); 108 } 109 } 110 111 argc -= optind; 112 argv += optind; 113 114 if (!argc) 115 usage(); 116 117 if (signal(SIGINT, SIG_IGN) != SIG_IGN) 118 (void)signal(SIGINT, catch); 119 if (preen) 120 (void)signal(SIGQUIT, catchquit); 121 122 while (argc-- > 0) 123 (void)checkfilesys(blockcheck(*argv++), 0, 0L, 0); 124 125 if (returntosingle) 126 ret = 2; 127 128 exit(ret); 129 } 130 131 static int 132 argtoi(int flag, char *req, char *str, int base) 133 { 134 char *cp; 135 int ret; 136 137 ret = (int)strtol(str, &cp, base); 138 if (cp == str || *cp) 139 errexit("-%c flag requires a %s\n", flag, req); 140 return (ret); 141 } 142 143 /* 144 * Check the specified filesystem. 145 */ 146 /* ARGSUSED */ 147 static int 148 checkfilesys(char *filesys, char *mntpt, long auxdata, int child) 149 { 150 daddr32_t n_bfree; 151 struct dups *dp; 152 struct zlncnt *zlnp; 153 int i; 154 155 if (preen && child) 156 (void)signal(SIGQUIT, voidquit); 157 setcdevname(filesys, NULL, preen); 158 if (debug && preen) 159 pwarn("starting\n"); 160 switch (setup(filesys)) { 161 case 0: 162 if (preen) 163 pfatal("CAN'T CHECK FILE SYSTEM."); 164 case -1: 165 return (0); 166 } 167 /* 168 * 1: scan inodes tallying blocks used 169 */ 170 if (preen == 0) { 171 if (sblock.e2fs.e2fs_rev > E2FS_REV0) { 172 printf("** Last Mounted on %s\n", 173 sblock.e2fs.e2fs_fsmnt); 174 } 175 if (hotroot()) 176 printf("** Root file system\n"); 177 printf("** Phase 1 - Check Blocks and Sizes\n"); 178 } 179 pass1(); 180 181 /* 182 * 1b: locate first references to duplicates, if any 183 */ 184 if (duplist) { 185 if (preen) 186 pfatal("INTERNAL ERROR: dups with -p"); 187 printf("** Phase 1b - Rescan For More DUPS\n"); 188 pass1b(); 189 } 190 191 /* 192 * 2: traverse directories from root to mark all connected directories 193 */ 194 if (preen == 0) 195 printf("** Phase 2 - Check Pathnames\n"); 196 pass2(); 197 198 /* 199 * 3: scan inodes looking for disconnected directories 200 */ 201 if (preen == 0) 202 printf("** Phase 3 - Check Connectivity\n"); 203 pass3(); 204 205 /* 206 * 4: scan inodes looking for disconnected files; check reference counts 207 */ 208 if (preen == 0) 209 printf("** Phase 4 - Check Reference Counts\n"); 210 pass4(); 211 212 /* 213 * 5: check and repair resource counts in cylinder groups 214 */ 215 if (preen == 0) 216 printf("** Phase 5 - Check Cyl groups\n"); 217 pass5(); 218 219 /* 220 * print out summary statistics 221 */ 222 n_bfree = sblock.e2fs.e2fs_fbcount; 223 224 pwarn("%d files, %d used, %d free\n", 225 n_files, n_blks, n_bfree); 226 if (debug && 227 /* 9 reserved and unused inodes in FS */ 228 (n_files -= maxino - 9 - sblock.e2fs.e2fs_ficount)) 229 printf("%d files missing\n", n_files); 230 if (debug) { 231 for (i = 0; i < sblock.e2fs_ncg; i++) 232 n_blks += cgoverhead(i); 233 n_blks += sblock.e2fs.e2fs_first_dblock; 234 if (n_blks -= maxfsblock - n_bfree) 235 printf("%d blocks missing\n", n_blks); 236 if (duplist != NULL) { 237 printf("The following duplicate blocks remain:"); 238 for (dp = duplist; dp; dp = dp->next) 239 printf(" %d,", dp->dup); 240 printf("\n"); 241 } 242 if (zlnhead != NULL) { 243 printf("The following zero link count inodes remain:"); 244 for (zlnp = zlnhead; zlnp; zlnp = zlnp->next) 245 printf(" %llu,", 246 (unsigned long long)zlnp->zlncnt); 247 printf("\n"); 248 } 249 } 250 zlnhead = (struct zlncnt *)0; 251 duplist = (struct dups *)0; 252 muldup = (struct dups *)0; 253 inocleanup(); 254 if (fsmodified) { 255 time_t t; 256 (void)time(&t); 257 sblock.e2fs.e2fs_wtime = t; 258 sblock.e2fs.e2fs_lastfsck = t; 259 sbdirty(); 260 } 261 ckfini(1); 262 free(blockmap); 263 free(statemap); 264 free((char *)lncntp); 265 if (!fsmodified) 266 return (0); 267 if (!preen) 268 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 269 if (rerun) 270 printf("\n***** PLEASE RERUN FSCK *****\n"); 271 if (hotroot()) { 272 struct statfs stfs_buf; 273 /* 274 * We modified the root. Do a mount update on 275 * it, unless it is read-write, so we can continue. 276 */ 277 if (statfs("/", &stfs_buf) == 0) { 278 long flags = stfs_buf.f_flags; 279 struct ufs_args args; 280 int ret; 281 282 if (flags & MNT_RDONLY) { 283 args.fspec = 0; 284 args.export_info.ex_flags = 0; 285 args.export_info.ex_root = 0; 286 flags |= MNT_UPDATE | MNT_RELOAD; 287 ret = mount(MOUNT_EXT2FS, "/", flags, &args); 288 if (ret == 0) 289 return(0); 290 } 291 } 292 if (!preen) 293 printf("\n***** REBOOT NOW *****\n"); 294 sync(); 295 return (4); 296 } 297 return (0); 298 } 299 300 static void 301 usage(void) 302 { 303 extern char *__progname; 304 305 (void) fprintf(stderr, 306 "usage: %s [-dfnpy] [-b block#] [-m mode] filesystem ...\n", 307 __progname); 308 exit(1); 309 } 310