1 /* $OpenBSD: main.c,v 1.28 2018/09/24 21:26:02 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 #include <err.h> 48 49 #include "fsck.h" 50 #include "extern.h" 51 #include "fsutil.h" 52 53 volatile sig_atomic_t returntosingle; 54 55 int main(int, char *[]); 56 57 static int argtoi(int, char *, char *, int); 58 static int checkfilesys(char *, char *, long, int); 59 static void usage(void); 60 61 62 int 63 main(int argc, char *argv[]) 64 { 65 int ch; 66 int ret = 0; 67 68 checkroot(); 69 70 sync(); 71 skipclean = 1; 72 while ((ch = getopt(argc, argv, "b:dfm:npy")) != -1) { 73 switch (ch) { 74 case 'b': 75 skipclean = 0; 76 bflag = argtoi('b', "number", optarg, 10); 77 printf("Alternate super block location: %d\n", bflag); 78 break; 79 80 case 'd': 81 debug = 1; 82 break; 83 84 case 'f': 85 skipclean = 0; 86 break; 87 88 case 'm': 89 lfmode = argtoi('m', "mode", optarg, 8); 90 if (lfmode &~ 07777) 91 errexit("bad mode to -m: %o\n", lfmode); 92 printf("** lost+found creation mode %o\n", lfmode); 93 break; 94 95 case 'n': 96 nflag = 1; 97 yflag = 0; 98 break; 99 100 case 'p': 101 preen = 1; 102 break; 103 104 case 'y': 105 yflag = 1; 106 nflag = 0; 107 break; 108 109 default: 110 usage(); 111 } 112 } 113 114 argc -= optind; 115 argv += optind; 116 117 if (argc != 1) 118 usage(); 119 120 if (signal(SIGINT, SIG_IGN) != SIG_IGN) 121 (void)signal(SIGINT, catch); 122 if (preen) 123 (void)signal(SIGQUIT, catchquit); 124 125 (void)checkfilesys(blockcheck(*argv), 0, 0L, 0); 126 127 if (returntosingle) 128 ret = 2; 129 130 exit(ret); 131 } 132 133 static int 134 argtoi(int flag, char *req, char *str, int base) 135 { 136 char *cp; 137 int ret; 138 139 ret = (int)strtol(str, &cp, base); 140 if (cp == str || *cp) 141 errexit("-%c flag requires a %s\n", flag, req); 142 return (ret); 143 } 144 145 /* 146 * Check the specified filesystem. 147 */ 148 /* ARGSUSED */ 149 static int 150 checkfilesys(char *filesys, char *mntpt, long auxdata, int child) 151 { 152 daddr32_t n_bfree; 153 struct dups *dp; 154 struct zlncnt *zlnp; 155 int i; 156 157 if (preen && child) 158 (void)signal(SIGQUIT, voidquit); 159 setcdevname(filesys, NULL, preen); 160 if (debug && preen) 161 pwarn("starting\n"); 162 163 switch (setup(filesys)) { 164 case 0: 165 if (preen) 166 pfatal("CAN'T CHECK FILE SYSTEM."); 167 case -1: 168 return (0); 169 } 170 /* 171 * 1: scan inodes tallying blocks used 172 */ 173 if (preen == 0) { 174 if (sblock.e2fs.e2fs_rev > E2FS_REV0) { 175 printf("** Last Mounted on %s\n", 176 sblock.e2fs.e2fs_fsmnt); 177 } 178 if (hotroot()) 179 printf("** Root file system\n"); 180 printf("** Phase 1 - Check Blocks and Sizes\n"); 181 } 182 pass1(); 183 184 /* 185 * 1b: locate first references to duplicates, if any 186 */ 187 if (duplist) { 188 if (preen) 189 pfatal("INTERNAL ERROR: dups with -p"); 190 printf("** Phase 1b - Rescan For More DUPS\n"); 191 pass1b(); 192 } 193 194 /* 195 * 2: traverse directories from root to mark all connected directories 196 */ 197 if (preen == 0) 198 printf("** Phase 2 - Check Pathnames\n"); 199 pass2(); 200 201 /* 202 * 3: scan inodes looking for disconnected directories 203 */ 204 if (preen == 0) 205 printf("** Phase 3 - Check Connectivity\n"); 206 pass3(); 207 208 /* 209 * 4: scan inodes looking for disconnected files; check reference counts 210 */ 211 if (preen == 0) 212 printf("** Phase 4 - Check Reference Counts\n"); 213 pass4(); 214 215 /* 216 * 5: check and repair resource counts in cylinder groups 217 */ 218 if (preen == 0) 219 printf("** Phase 5 - Check Cyl groups\n"); 220 pass5(); 221 222 /* 223 * print out summary statistics 224 */ 225 n_bfree = sblock.e2fs.e2fs_fbcount; 226 227 pwarn("%d files, %d used, %d free\n", 228 n_files, n_blks, n_bfree); 229 if (debug && 230 /* 9 reserved and unused inodes in FS */ 231 (n_files -= maxino - 9 - sblock.e2fs.e2fs_ficount)) 232 printf("%d files missing\n", n_files); 233 if (debug) { 234 for (i = 0; i < sblock.e2fs_ncg; i++) 235 n_blks += cgoverhead(i); 236 n_blks += sblock.e2fs.e2fs_first_dblock; 237 if (n_blks -= maxfsblock - n_bfree) 238 printf("%d blocks missing\n", n_blks); 239 if (duplist != NULL) { 240 printf("The following duplicate blocks remain:"); 241 for (dp = duplist; dp; dp = dp->next) 242 printf(" %d,", dp->dup); 243 printf("\n"); 244 } 245 if (zlnhead != NULL) { 246 printf("The following zero link count inodes remain:"); 247 for (zlnp = zlnhead; zlnp; zlnp = zlnp->next) 248 printf(" %llu,", 249 (unsigned long long)zlnp->zlncnt); 250 printf("\n"); 251 } 252 } 253 zlnhead = NULL; 254 duplist = NULL; 255 muldup = NULL; 256 inocleanup(); 257 if (fsmodified) { 258 time_t t; 259 (void)time(&t); 260 sblock.e2fs.e2fs_wtime = t; 261 sblock.e2fs.e2fs_lastfsck = t; 262 sbdirty(); 263 } 264 ckfini(1); 265 free(blockmap); 266 free(statemap); 267 free((char *)lncntp); 268 if (!fsmodified) 269 return (0); 270 if (!preen) 271 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 272 if (rerun) 273 printf("\n***** PLEASE RERUN FSCK *****\n"); 274 if (hotroot()) { 275 struct statfs stfs_buf; 276 /* 277 * We modified the root. Do a mount update on 278 * it, unless it is read-write, so we can continue. 279 */ 280 if (statfs("/", &stfs_buf) == 0) { 281 long flags = stfs_buf.f_flags; 282 struct ufs_args args; 283 int ret; 284 285 if (flags & MNT_RDONLY) { 286 args.fspec = 0; 287 args.export_info.ex_flags = 0; 288 args.export_info.ex_root = 0; 289 flags |= MNT_UPDATE | MNT_RELOAD; 290 ret = mount(MOUNT_EXT2FS, "/", flags, &args); 291 if (ret == 0) 292 return(0); 293 } 294 } 295 if (!preen) 296 printf("\n***** REBOOT NOW *****\n"); 297 sync(); 298 return (4); 299 } 300 return (0); 301 } 302 303 static void 304 usage(void) 305 { 306 extern char *__progname; 307 308 (void) fprintf(stderr, 309 "usage: %s [-dfnpy] [-b block#] [-m mode] filesystem\n", 310 __progname); 311 exit(1); 312 } 313