1 /* 2 * Copyright (c) 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. 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 #ifndef lint 35 static const char sccsid[] = "@(#)preen.c 8.1 (Berkeley) 6/5/93"; 36 #endif /* not lint */ 37 38 #include <sys/param.h> 39 #include <sys/stat.h> 40 #include <sys/wait.h> 41 #include <ufs/ufs/dinode.h> 42 #include <fstab.h> 43 #include <string.h> 44 #include <stdio.h> 45 #include <unistd.h> 46 #include <stdlib.h> 47 #include <ctype.h> 48 #include <fstab.h> 49 #include "fsck.h" 50 51 struct part { 52 struct part *next; /* forward link of partitions on disk */ 53 char *name; /* device name */ 54 char *fsname; /* mounted filesystem name */ 55 long auxdata; /* auxillary data for application */ 56 } *badlist, **badnext = &badlist; 57 58 struct disk { 59 char *name; /* disk base name */ 60 struct disk *next; /* forward link for list of disks */ 61 struct part *part; /* head of list of partitions on disk */ 62 int pid; /* If != 0, pid of proc working on */ 63 } *disks; 64 65 static void addpart __P((char *name, char *fsname, long auxdata)); 66 static int startdisk __P((struct disk *dk, int (*checkit)())); 67 static struct disk *finddisk __P((char *name)); 68 static char *unrawname __P((char *name)); 69 static char *rawname __P((char *name)); 70 71 int nrun, ndisks; 72 char hotroot; 73 74 int 75 checkfstab(preen, maxrun, docheck, chkit) 76 int preen, maxrun; 77 int (*docheck)(), (*chkit)(); 78 { 79 register struct fstab *fsp; 80 register struct disk *dk, *nextdisk; 81 register struct part *pt; 82 int ret, pid, retcode, passno, sumstatus, status; 83 long auxdata; 84 char *name; 85 86 sumstatus = 0; 87 for (passno = 1; passno <= 2; passno++) { 88 if (setfsent() == 0) { 89 fprintf(stderr, "Can't open checklist file: %s\n", 90 _PATH_FSTAB); 91 return (8); 92 } 93 while ((fsp = getfsent()) != 0) { 94 if ((auxdata = (*docheck)(fsp)) == 0) 95 continue; 96 if (!preen || (passno == 1 && fsp->fs_passno == 1)) { 97 name = blockcheck(fsp->fs_spec); 98 if (name) { 99 sumstatus = (*chkit)(name, 100 fsp->fs_file, auxdata, 0); 101 if (sumstatus) 102 return (sumstatus); 103 } else if (preen) 104 return (8); 105 } else if (passno == 2 && fsp->fs_passno > 1) { 106 if ((name = blockcheck(fsp->fs_spec)) == NULL) { 107 fprintf(stderr, "BAD DISK NAME %s\n", 108 fsp->fs_spec); 109 sumstatus |= 8; 110 continue; 111 } 112 addpart(name, fsp->fs_file, auxdata); 113 } 114 } 115 if (preen == 0) 116 return (0); 117 } 118 if (preen) { 119 if (maxrun == 0) 120 maxrun = ndisks; 121 if (maxrun > ndisks) 122 maxrun = ndisks; 123 nextdisk = disks; 124 for (passno = 0; passno < maxrun; ++passno) { 125 while ((ret = startdisk(nextdisk, chkit)) != 0 && 126 nrun > 0) 127 sleep(10); 128 if (ret) 129 return (ret); 130 nextdisk = nextdisk->next; 131 } 132 while ((pid = wait(&status)) != -1) { 133 for (dk = disks; dk; dk = dk->next) 134 if (dk->pid == pid) 135 break; 136 if (dk == 0) { 137 printf("Unknown pid %d\n", pid); 138 continue; 139 } 140 if (WIFEXITED(status)) 141 retcode = WEXITSTATUS(status); 142 else 143 retcode = 0; 144 if (WIFSIGNALED(status)) { 145 printf("%s (%s): EXITED WITH SIGNAL %d\n", 146 dk->part->name, dk->part->fsname, 147 WTERMSIG(status)); 148 retcode = 8; 149 } 150 if (retcode != 0) { 151 sumstatus |= retcode; 152 *badnext = dk->part; 153 badnext = &dk->part->next; 154 dk->part = dk->part->next; 155 *badnext = NULL; 156 } else 157 dk->part = dk->part->next; 158 dk->pid = 0; 159 nrun--; 160 if (dk->part == NULL) 161 ndisks--; 162 163 if (nextdisk == NULL) { 164 if (dk->part) { 165 while ((ret = startdisk(dk, chkit)) != 0 166 && nrun > 0) 167 sleep(10); 168 if (ret) 169 return (ret); 170 } 171 } else if (nrun < maxrun && nrun < ndisks) { 172 for ( ;; ) { 173 if ((nextdisk = nextdisk->next) == NULL) 174 nextdisk = disks; 175 if (nextdisk->part != NULL && 176 nextdisk->pid == 0) 177 break; 178 } 179 while ((ret = startdisk(nextdisk, chkit)) != 0 180 && nrun > 0) 181 sleep(10); 182 if (ret) 183 return (ret); 184 } 185 } 186 } 187 if (sumstatus) { 188 if (badlist == 0) 189 return (sumstatus); 190 fprintf(stderr, "THE FOLLOWING FILE SYSTEM%s HAD AN %s\n\t", 191 badlist->next ? "S" : "", "UNEXPECTED INCONSISTENCY:"); 192 for (pt = badlist; pt; pt = pt->next) 193 fprintf(stderr, "%s (%s)%s", pt->name, pt->fsname, 194 pt->next ? ", " : "\n"); 195 return (sumstatus); 196 } 197 (void)endfsent(); 198 return (0); 199 } 200 201 struct disk * 202 finddisk(name) 203 char *name; 204 { 205 register struct disk *dk, **dkp; 206 register char *p; 207 size_t len = 0; 208 209 for (p = name + strlen(name) - 1; p >= name; --p) 210 if (isdigit(*p)) { 211 len = p - name + 1; 212 break; 213 } 214 if (p < name) 215 len = strlen(name); 216 217 for (dk = disks, dkp = &disks; dk; dkp = &dk->next, dk = dk->next) { 218 if (strncmp(dk->name, name, len) == 0 && 219 dk->name[len] == 0) 220 return (dk); 221 } 222 if ((*dkp = (struct disk *)malloc(sizeof(struct disk))) == NULL) { 223 fprintf(stderr, "out of memory"); 224 exit (8); 225 } 226 dk = *dkp; 227 if ((dk->name = malloc(len + 1)) == NULL) { 228 fprintf(stderr, "out of memory"); 229 exit (8); 230 } 231 (void)strncpy(dk->name, name, len); 232 dk->name[len] = '\0'; 233 dk->part = NULL; 234 dk->next = NULL; 235 dk->pid = 0; 236 ndisks++; 237 return (dk); 238 } 239 240 void 241 addpart(name, fsname, auxdata) 242 char *name, *fsname; 243 long auxdata; 244 { 245 struct disk *dk = finddisk(name); 246 register struct part *pt, **ppt = &dk->part; 247 248 for (pt = dk->part; pt; ppt = &pt->next, pt = pt->next) 249 if (strcmp(pt->name, name) == 0) { 250 printf("%s in fstab more than once!\n", name); 251 return; 252 } 253 if ((*ppt = (struct part *)malloc(sizeof(struct part))) == NULL) { 254 fprintf(stderr, "out of memory"); 255 exit (8); 256 } 257 pt = *ppt; 258 if ((pt->name = malloc(strlen(name) + 1)) == NULL) { 259 fprintf(stderr, "out of memory"); 260 exit (8); 261 } 262 (void)strcpy(pt->name, name); 263 if ((pt->fsname = malloc(strlen(fsname) + 1)) == NULL) { 264 fprintf(stderr, "out of memory"); 265 exit (8); 266 } 267 (void)strcpy(pt->fsname, fsname); 268 pt->next = NULL; 269 pt->auxdata = auxdata; 270 } 271 272 int 273 startdisk(dk, checkit) 274 register struct disk *dk; 275 int (*checkit)(); 276 { 277 register struct part *pt = dk->part; 278 279 dk->pid = fork(); 280 if (dk->pid < 0) { 281 perror("fork"); 282 return (8); 283 } 284 if (dk->pid == 0) 285 exit((*checkit)(pt->name, pt->fsname, pt->auxdata, 1)); 286 nrun++; 287 return (0); 288 } 289 290 char * 291 blockcheck(name) 292 char *name; 293 { 294 struct stat stslash, stblock, stchar; 295 char *raw; 296 struct fstab *fsinfo; 297 int retried = 0, l; 298 299 hotroot = 0; 300 if (stat("/", &stslash) < 0) { 301 perror("/"); 302 printf("Can't stat root\n"); 303 return (0); 304 } 305 retry: 306 if (stat(name, &stblock) < 0) { 307 perror(name); 308 printf("Can't stat %s\n", name); 309 return (0); 310 } 311 if ((stblock.st_mode & S_IFMT) == S_IFBLK) { 312 if (stslash.st_dev == stblock.st_rdev) 313 hotroot++; 314 raw = rawname(name); 315 if (stat(raw, &stchar) < 0) { 316 perror(raw); 317 printf("Can't stat %s\n", raw); 318 return (name); 319 } 320 if ((stchar.st_mode & S_IFMT) == S_IFCHR) { 321 return (raw); 322 } else { 323 printf("%s is not a character device\n", raw); 324 return (name); 325 } 326 } else if ((stblock.st_mode & S_IFMT) == S_IFCHR && !retried) { 327 name = unrawname(name); 328 retried++; 329 goto retry; 330 } else if ((stblock.st_mode & S_IFMT) == S_IFDIR && !retried) { 331 l = strlen(name) - 1; 332 if (l > 0 && name[l] == '/') 333 /* remove trailing slash */ 334 name[l] = '\0'; 335 if(!(fsinfo=getfsfile(name))) { 336 printf("Can't resolve %s to character special device", 337 name); 338 return (0); 339 } 340 name = fsinfo->fs_spec; 341 retried++; 342 goto retry; 343 } 344 printf("Warning: Can't find blockdevice corresponding to name %s\n", 345 name); 346 return (name); 347 } 348 349 char * 350 unrawname(name) 351 char *name; 352 { 353 char *dp; 354 struct stat stb; 355 356 if ((dp = rindex(name, '/')) == 0) 357 return (name); 358 if (stat(name, &stb) < 0) 359 return (name); 360 if ((stb.st_mode & S_IFMT) != S_IFCHR) 361 return (name); 362 if (dp[1] != 'r') 363 return (name); 364 (void)strcpy(&dp[1], &dp[2]); 365 return (name); 366 } 367 368 char * 369 rawname(name) 370 char *name; 371 { 372 static char rawbuf[32]; 373 char *dp; 374 375 if ((dp = rindex(name, '/')) == 0) 376 return (0); 377 *dp = 0; 378 (void)strcpy(rawbuf, name); 379 *dp = '/'; 380 (void)strcat(rawbuf, "/r"); 381 (void)strcat(rawbuf, &dp[1]); 382 return (rawbuf); 383 } 384