1 /* $OpenBSD: main.c,v 1.27 2016/03/16 15:41:10 krw 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 sync(); 69 skipclean = 1; 70 while ((ch = getopt(argc, argv, "b:dfm:npy")) != -1) { 71 switch (ch) { 72 case 'b': 73 skipclean = 0; 74 bflag = argtoi('b', "number", optarg, 10); 75 printf("Alternate super block location: %d\n", bflag); 76 break; 77 78 case 'd': 79 debug = 1; 80 break; 81 82 case 'f': 83 skipclean = 0; 84 break; 85 86 case 'm': 87 lfmode = argtoi('m', "mode", optarg, 8); 88 if (lfmode &~ 07777) 89 errexit("bad mode to -m: %o\n", lfmode); 90 printf("** lost+found creation mode %o\n", lfmode); 91 break; 92 93 case 'n': 94 nflag = 1; 95 yflag = 0; 96 break; 97 98 case 'p': 99 preen = 1; 100 break; 101 102 case 'y': 103 yflag = 1; 104 nflag = 0; 105 break; 106 107 default: 108 usage(); 109 } 110 } 111 112 argc -= optind; 113 argv += optind; 114 115 if (argc != 1) 116 usage(); 117 118 if (signal(SIGINT, SIG_IGN) != SIG_IGN) 119 (void)signal(SIGINT, catch); 120 if (preen) 121 (void)signal(SIGQUIT, catchquit); 122 123 (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"); 160 161 switch (setup(filesys)) { 162 case 0: 163 if (preen) 164 pfatal("CAN'T CHECK FILE SYSTEM."); 165 case -1: 166 return (0); 167 } 168 /* 169 * 1: scan inodes tallying blocks used 170 */ 171 if (preen == 0) { 172 if (sblock.e2fs.e2fs_rev > E2FS_REV0) { 173 printf("** Last Mounted on %s\n", 174 sblock.e2fs.e2fs_fsmnt); 175 } 176 if (hotroot()) 177 printf("** Root file system\n"); 178 printf("** Phase 1 - Check Blocks and Sizes\n"); 179 } 180 pass1(); 181 182 /* 183 * 1b: locate first references to duplicates, if any 184 */ 185 if (duplist) { 186 if (preen) 187 pfatal("INTERNAL ERROR: dups with -p"); 188 printf("** Phase 1b - Rescan For More DUPS\n"); 189 pass1b(); 190 } 191 192 /* 193 * 2: traverse directories from root to mark all connected directories 194 */ 195 if (preen == 0) 196 printf("** Phase 2 - Check Pathnames\n"); 197 pass2(); 198 199 /* 200 * 3: scan inodes looking for disconnected directories 201 */ 202 if (preen == 0) 203 printf("** Phase 3 - Check Connectivity\n"); 204 pass3(); 205 206 /* 207 * 4: scan inodes looking for disconnected files; check reference counts 208 */ 209 if (preen == 0) 210 printf("** Phase 4 - Check Reference Counts\n"); 211 pass4(); 212 213 /* 214 * 5: check and repair resource counts in cylinder groups 215 */ 216 if (preen == 0) 217 printf("** Phase 5 - Check Cyl groups\n"); 218 pass5(); 219 220 /* 221 * print out summary statistics 222 */ 223 n_bfree = sblock.e2fs.e2fs_fbcount; 224 225 pwarn("%d files, %d used, %d free\n", 226 n_files, n_blks, n_bfree); 227 if (debug && 228 /* 9 reserved and unused inodes in FS */ 229 (n_files -= maxino - 9 - sblock.e2fs.e2fs_ficount)) 230 printf("%d files missing\n", n_files); 231 if (debug) { 232 for (i = 0; i < sblock.e2fs_ncg; i++) 233 n_blks += cgoverhead(i); 234 n_blks += sblock.e2fs.e2fs_first_dblock; 235 if (n_blks -= maxfsblock - n_bfree) 236 printf("%d blocks missing\n", n_blks); 237 if (duplist != NULL) { 238 printf("The following duplicate blocks remain:"); 239 for (dp = duplist; dp; dp = dp->next) 240 printf(" %d,", dp->dup); 241 printf("\n"); 242 } 243 if (zlnhead != NULL) { 244 printf("The following zero link count inodes remain:"); 245 for (zlnp = zlnhead; zlnp; zlnp = zlnp->next) 246 printf(" %llu,", 247 (unsigned long long)zlnp->zlncnt); 248 printf("\n"); 249 } 250 } 251 zlnhead = NULL; 252 duplist = NULL; 253 muldup = NULL; 254 inocleanup(); 255 if (fsmodified) { 256 time_t t; 257 (void)time(&t); 258 sblock.e2fs.e2fs_wtime = t; 259 sblock.e2fs.e2fs_lastfsck = t; 260 sbdirty(); 261 } 262 ckfini(1); 263 free(blockmap); 264 free(statemap); 265 free((char *)lncntp); 266 if (!fsmodified) 267 return (0); 268 if (!preen) 269 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 270 if (rerun) 271 printf("\n***** PLEASE RERUN FSCK *****\n"); 272 if (hotroot()) { 273 struct statfs stfs_buf; 274 /* 275 * We modified the root. Do a mount update on 276 * it, unless it is read-write, so we can continue. 277 */ 278 if (statfs("/", &stfs_buf) == 0) { 279 long flags = stfs_buf.f_flags; 280 struct ufs_args args; 281 int ret; 282 283 if (flags & MNT_RDONLY) { 284 args.fspec = 0; 285 args.export_info.ex_flags = 0; 286 args.export_info.ex_root = 0; 287 flags |= MNT_UPDATE | MNT_RELOAD; 288 ret = mount(MOUNT_EXT2FS, "/", flags, &args); 289 if (ret == 0) 290 return(0); 291 } 292 } 293 if (!preen) 294 printf("\n***** REBOOT NOW *****\n"); 295 sync(); 296 return (4); 297 } 298 return (0); 299 } 300 301 static void 302 usage(void) 303 { 304 extern char *__progname; 305 306 (void) fprintf(stderr, 307 "usage: %s [-dfnpy] [-b block#] [-m mode] filesystem\n", 308 __progname); 309 exit(1); 310 } 311