| 1 | /* |
| 2 | * Copyright (c) 1980 Regents of the University of California. |
| 3 | * All rights reserved. The Berkeley software License Agreement |
| 4 | * specifies the terms and conditions for redistribution. |
| 5 | */ |
| 6 | |
| 7 | #ifndef lint |
| 8 | char copyright[] = |
| 9 | "@(#) Copyright (c) 1980 Regents of the University of California.\n\ |
| 10 | All rights reserved.\n"; |
| 11 | #endif not lint |
| 12 | |
| 13 | #ifndef lint |
| 14 | static char sccsid[] = "@(#)main.c 5.5 (Berkeley) %G%"; |
| 15 | #endif not lint |
| 16 | |
| 17 | #include <sys/param.h> |
| 18 | #include <sys/inode.h> |
| 19 | #include <sys/fs.h> |
| 20 | #include <sys/stat.h> |
| 21 | #include <sys/wait.h> |
| 22 | #include <fstab.h> |
| 23 | #include <strings.h> |
| 24 | #include "fsck.h" |
| 25 | |
| 26 | char *rawname(), *unrawname(), *blockcheck(); |
| 27 | int catch(), catchquit(), voidquit(); |
| 28 | int returntosingle; |
| 29 | int (*signal())(); |
| 30 | |
| 31 | main(argc, argv) |
| 32 | int argc; |
| 33 | char *argv[]; |
| 34 | { |
| 35 | struct fstab *fsp; |
| 36 | int pid, passno, anygtr, sumstatus; |
| 37 | char *name; |
| 38 | |
| 39 | sync(); |
| 40 | while (--argc > 0 && **++argv == '-') { |
| 41 | switch (*++*argv) { |
| 42 | |
| 43 | case 'p': |
| 44 | preen++; |
| 45 | break; |
| 46 | |
| 47 | case 'b': |
| 48 | if (argv[0][1] != '\0') { |
| 49 | bflag = atoi(argv[0]+1); |
| 50 | } else { |
| 51 | bflag = atoi(*++argv); |
| 52 | argc--; |
| 53 | } |
| 54 | printf("Alternate super block location: %d\n", bflag); |
| 55 | break; |
| 56 | |
| 57 | case 'd': |
| 58 | debug++; |
| 59 | break; |
| 60 | |
| 61 | case 'n': /* default no answer flag */ |
| 62 | case 'N': |
| 63 | nflag++; |
| 64 | yflag = 0; |
| 65 | break; |
| 66 | |
| 67 | case 'y': /* default yes answer flag */ |
| 68 | case 'Y': |
| 69 | yflag++; |
| 70 | nflag = 0; |
| 71 | break; |
| 72 | |
| 73 | default: |
| 74 | errexit("%c option?\n", **argv); |
| 75 | } |
| 76 | } |
| 77 | if (signal(SIGINT, SIG_IGN) != SIG_IGN) |
| 78 | (void)signal(SIGINT, catch); |
| 79 | if (preen) |
| 80 | (void)signal(SIGQUIT, catchquit); |
| 81 | if (argc) { |
| 82 | while (argc-- > 0) { |
| 83 | hotroot = 0; |
| 84 | name = blockcheck(*argv++); |
| 85 | checkfilesys(name); |
| 86 | } |
| 87 | exit(0); |
| 88 | } |
| 89 | sumstatus = 0; |
| 90 | passno = 1; |
| 91 | do { |
| 92 | anygtr = 0; |
| 93 | if (setfsent() == 0) |
| 94 | errexit("Can't open checklist file: %s\n", FSTAB); |
| 95 | while ((fsp = getfsent()) != 0) { |
| 96 | if (strcmp(fsp->fs_type, FSTAB_RW) && |
| 97 | strcmp(fsp->fs_type, FSTAB_RO) && |
| 98 | strcmp(fsp->fs_type, FSTAB_RQ)) |
| 99 | continue; |
| 100 | if (preen == 0 || |
| 101 | passno == 1 && fsp->fs_passno == passno) { |
| 102 | name = blockcheck(fsp->fs_spec); |
| 103 | if (name != NULL) |
| 104 | checkfilesys(name); |
| 105 | else if (preen) |
| 106 | exit(8); |
| 107 | } else if (fsp->fs_passno > passno) { |
| 108 | anygtr = 1; |
| 109 | } else if (fsp->fs_passno == passno) { |
| 110 | pid = fork(); |
| 111 | if (pid < 0) { |
| 112 | perror("fork"); |
| 113 | exit(8); |
| 114 | } |
| 115 | if (pid == 0) { |
| 116 | (void)signal(SIGQUIT, voidquit); |
| 117 | name = blockcheck(fsp->fs_spec); |
| 118 | if (name == NULL) |
| 119 | exit(8); |
| 120 | checkfilesys(name); |
| 121 | exit(0); |
| 122 | } |
| 123 | } |
| 124 | } |
| 125 | if (preen) { |
| 126 | union wait status; |
| 127 | while (wait(&status) != -1) |
| 128 | sumstatus |= status.w_retcode; |
| 129 | } |
| 130 | passno++; |
| 131 | } while (anygtr); |
| 132 | if (sumstatus) |
| 133 | exit(8); |
| 134 | (void)endfsent(); |
| 135 | if (returntosingle) |
| 136 | exit(2); |
| 137 | exit(0); |
| 138 | } |
| 139 | |
| 140 | checkfilesys(filesys) |
| 141 | char *filesys; |
| 142 | { |
| 143 | daddr_t n_ffree, n_bfree; |
| 144 | struct dups *dp; |
| 145 | struct zlncnt *zlnp; |
| 146 | |
| 147 | devname = filesys; |
| 148 | if (setup(filesys) == 0) { |
| 149 | if (preen) |
| 150 | pfatal("CAN'T CHECK FILE SYSTEM."); |
| 151 | return; |
| 152 | } |
| 153 | /* |
| 154 | * 1: scan inodes tallying blocks used |
| 155 | */ |
| 156 | if (preen == 0) { |
| 157 | printf("** Last Mounted on %s\n", sblock.fs_fsmnt); |
| 158 | if (hotroot) |
| 159 | printf("** Root file system\n"); |
| 160 | printf("** Phase 1 - Check Blocks and Sizes\n"); |
| 161 | } |
| 162 | pass1(); |
| 163 | |
| 164 | /* |
| 165 | * 1b: locate first references to duplicates, if any |
| 166 | */ |
| 167 | if (duplist) { |
| 168 | if (preen) |
| 169 | pfatal("INTERNAL ERROR: dups with -p"); |
| 170 | printf("** Phase 1b - Rescan For More DUPS\n"); |
| 171 | pass1b(); |
| 172 | } |
| 173 | |
| 174 | /* |
| 175 | * 2: traverse directories from root to mark all connected directories |
| 176 | */ |
| 177 | if (preen == 0) |
| 178 | printf("** Phase 2 - Check Pathnames\n"); |
| 179 | pass2(); |
| 180 | |
| 181 | /* |
| 182 | * 3: scan inodes looking for disconnected directories |
| 183 | */ |
| 184 | if (preen == 0) |
| 185 | printf("** Phase 3 - Check Connectivity\n"); |
| 186 | pass3(); |
| 187 | |
| 188 | /* |
| 189 | * 4: scan inodes looking for disconnected files; check reference counts |
| 190 | */ |
| 191 | if (preen == 0) |
| 192 | printf("** Phase 4 - Check Reference Counts\n"); |
| 193 | pass4(); |
| 194 | |
| 195 | /* |
| 196 | * 5: check and repair resource counts in cylinder groups |
| 197 | */ |
| 198 | if (preen == 0) |
| 199 | printf("** Phase 5 - Check Cyl groups\n"); |
| 200 | pass5(); |
| 201 | |
| 202 | /* |
| 203 | * print out summary statistics |
| 204 | */ |
| 205 | n_ffree = sblock.fs_cstotal.cs_nffree; |
| 206 | n_bfree = sblock.fs_cstotal.cs_nbfree; |
| 207 | pwarn("%d files, %d used, %d free ", |
| 208 | n_files, n_blks, n_ffree + sblock.fs_frag * n_bfree); |
| 209 | printf("(%d frags, %d blocks, %.1f%% fragmentation)\n", |
| 210 | n_ffree, n_bfree, (float)(n_ffree * 100) / sblock.fs_dsize); |
| 211 | if (debug && (n_files -= imax - ROOTINO - sblock.fs_cstotal.cs_nifree)) |
| 212 | printf("%d files missing\n", n_files); |
| 213 | if (debug) { |
| 214 | n_blks += sblock.fs_ncg * |
| 215 | (cgdmin(&sblock, 0) - cgsblock(&sblock, 0)); |
| 216 | n_blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0); |
| 217 | n_blks += howmany(sblock.fs_cssize, sblock.fs_fsize); |
| 218 | if (n_blks -= fmax - (n_ffree + sblock.fs_frag * n_bfree)) |
| 219 | printf("%d blocks missing\n", n_blks); |
| 220 | if (duplist != NULL) { |
| 221 | printf("The following duplicate blocks remain:"); |
| 222 | for (dp = duplist; dp; dp = dp->next) |
| 223 | printf(" %d,", dp->dup); |
| 224 | printf("\n"); |
| 225 | } |
| 226 | if (zlnhead != NULL) { |
| 227 | printf("The following zero link count inodes remain:"); |
| 228 | for (zlnp = zlnhead; zlnp; zlnp = zlnp->next) |
| 229 | printf(" %d,", zlnp->zlncnt); |
| 230 | printf("\n"); |
| 231 | } |
| 232 | } |
| 233 | zlnhead = (struct zlncnt *)0; |
| 234 | duplist = (struct dups *)0; |
| 235 | if (dfile.mod) { |
| 236 | (void)time(&sblock.fs_time); |
| 237 | sbdirty(); |
| 238 | } |
| 239 | ckfini(); |
| 240 | free(blockmap); |
| 241 | free(statemap); |
| 242 | free((char *)lncntp); |
| 243 | if (!dfile.mod) |
| 244 | return; |
| 245 | if (!preen) { |
| 246 | printf("\n***** FILE SYSTEM WAS MODIFIED *****\n"); |
| 247 | if (hotroot) |
| 248 | printf("\n***** REBOOT UNIX *****\n"); |
| 249 | } |
| 250 | if (hotroot) { |
| 251 | sync(); |
| 252 | exit(4); |
| 253 | } |
| 254 | } |
| 255 | |
| 256 | char * |
| 257 | blockcheck(name) |
| 258 | char *name; |
| 259 | { |
| 260 | struct stat stslash, stblock, stchar; |
| 261 | char *raw; |
| 262 | int looped = 0; |
| 263 | |
| 264 | hotroot = 0; |
| 265 | if (stat("/", &stslash) < 0){ |
| 266 | printf("Can't stat root\n"); |
| 267 | return (0); |
| 268 | } |
| 269 | retry: |
| 270 | if (stat(name, &stblock) < 0){ |
| 271 | printf("Can't stat %s\n", name); |
| 272 | return (0); |
| 273 | } |
| 274 | if ((stblock.st_mode & S_IFMT) == S_IFBLK) { |
| 275 | raw = rawname(name); |
| 276 | if (stat(raw, &stchar) < 0){ |
| 277 | printf("Can't stat %s\n", raw); |
| 278 | return (0); |
| 279 | } |
| 280 | if ((stchar.st_mode & S_IFMT) == S_IFCHR) { |
| 281 | if (stslash.st_dev == stblock.st_rdev) { |
| 282 | hotroot++; |
| 283 | raw = unrawname(name); |
| 284 | } |
| 285 | return (raw); |
| 286 | } else { |
| 287 | printf("%s is not a character device\n", raw); |
| 288 | return (0); |
| 289 | } |
| 290 | } else if ((stblock.st_mode & S_IFMT) == S_IFCHR) { |
| 291 | if (looped) { |
| 292 | printf("Can't make sense out of name %s\n", name); |
| 293 | return (0); |
| 294 | } |
| 295 | name = unrawname(name); |
| 296 | looped++; |
| 297 | goto retry; |
| 298 | } |
| 299 | printf("Can't make sense out of name %s\n", name); |
| 300 | return (0); |
| 301 | } |
| 302 | |
| 303 | char * |
| 304 | unrawname(cp) |
| 305 | char *cp; |
| 306 | { |
| 307 | char *dp = rindex(cp, '/'); |
| 308 | struct stat stb; |
| 309 | |
| 310 | if (dp == 0) |
| 311 | return (cp); |
| 312 | if (stat(cp, &stb) < 0) |
| 313 | return (cp); |
| 314 | if ((stb.st_mode&S_IFMT) != S_IFCHR) |
| 315 | return (cp); |
| 316 | if (*(dp+1) != 'r') |
| 317 | return (cp); |
| 318 | (void)strcpy(dp+1, dp+2); |
| 319 | return (cp); |
| 320 | } |
| 321 | |
| 322 | char * |
| 323 | rawname(cp) |
| 324 | char *cp; |
| 325 | { |
| 326 | static char rawbuf[32]; |
| 327 | char *dp = rindex(cp, '/'); |
| 328 | |
| 329 | if (dp == 0) |
| 330 | return (0); |
| 331 | *dp = 0; |
| 332 | (void)strcpy(rawbuf, cp); |
| 333 | *dp = '/'; |
| 334 | (void)strcat(rawbuf, "/r"); |
| 335 | (void)strcat(rawbuf, dp+1); |
| 336 | return (rawbuf); |
| 337 | } |