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 8.5 (Berkeley) 4/28/95"; 36 #endif /* not lint */ 37 38 #include <sys/param.h> 39 #include <sys/stat.h> 40 #include <sys/wait.h> 41 42 #include <ufs/ufs/dinode.h> 43 44 #include <ctype.h> 45 #include <fstab.h> 46 #include <string.h> 47 48 #include "fsck.h" 49 50 struct part { 51 struct part *next; /* forward link of partitions on disk */ 52 char *name; /* device name */ 53 char *fsname; /* mounted filesystem name */ 54 long auxdata; /* auxillary data for application */ 55 } *badlist, **badnext = &badlist; 56 57 struct disk { 58 char *name; /* disk base name */ 59 struct disk *next; /* forward link for list of disks */ 60 struct part *part; /* head of list of partitions on disk */ 61 int pid; /* If != 0, pid of proc working on */ 62 } *disks; 63 64 int nrun, ndisks; 65 char hotroot; 66 67 static void addpart __P((char *name, char *fsname, long auxdata)); 68 static struct disk *finddisk __P((char *name)); 69 static char *rawname __P((char *name)); 70 static int startdisk __P((struct disk *dk, 71 int (*checkit)(char *, char *, long, int))); 72 static char *unrawname __P((char *name)); 73 74 int 75 checkfstab(preen, maxrun, docheck, chkit) 76 int preen; 77 int maxrun; 78 int (*docheck)(struct fstab *); 79 int (*chkit)(char *, char *, long, int); 80 { 81 register struct fstab *fsp; 82 register struct disk *dk, *nextdisk; 83 register struct part *pt; 84 int ret, pid, retcode, passno, sumstatus, status; 85 long auxdata; 86 char *name; 87 88 sumstatus = 0; 89 for (passno = 1; passno <= 2; passno++) { 90 if (setfsent() == 0) { 91 fprintf(stderr, "Can't open checklist file: %s\n", 92 _PATH_FSTAB); 93 return (8); 94 } 95 while ((fsp = getfsent()) != 0) { 96 if ((auxdata = (*docheck)(fsp)) == 0) 97 continue; 98 if (preen == 0 || 99 (passno == 1 && fsp->fs_passno == 1)) { 100 if ((name = blockcheck(fsp->fs_spec)) != 0) { 101 if ((sumstatus = (*chkit)(name, 102 fsp->fs_file, auxdata, 0)) != 0) 103 return (sumstatus); 104 } else if (preen) 105 return (8); 106 } else if (passno == 2 && fsp->fs_passno > 1) { 107 if ((name = blockcheck(fsp->fs_spec)) == NULL) { 108 fprintf(stderr, "BAD DISK NAME %s\n", 109 fsp->fs_spec); 110 sumstatus |= 8; 111 continue; 112 } 113 addpart(name, fsp->fs_file, auxdata); 114 } 115 } 116 if (preen == 0) 117 return (0); 118 } 119 if (preen) { 120 if (maxrun == 0) 121 maxrun = ndisks; 122 if (maxrun > ndisks) 123 maxrun = ndisks; 124 nextdisk = disks; 125 for (passno = 0; passno < maxrun; ++passno) { 126 while ((ret = startdisk(nextdisk, chkit)) && 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)) && 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)) && 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 static struct disk * 202 finddisk(name) 203 char *name; 204 { 205 register struct disk *dk, **dkp; 206 register char *p; 207 size_t len; 208 209 for (len = strlen(name), p = name + len - 1; p >= name; --p) 210 if (isdigit(*p)) { 211 len = p - name + 1; 212 break; 213 } 214 215 for (dk = disks, dkp = &disks; dk; dkp = &dk->next, dk = dk->next) { 216 if (strncmp(dk->name, name, len) == 0 && 217 dk->name[len] == 0) 218 return (dk); 219 } 220 if ((*dkp = (struct disk *)malloc(sizeof(struct disk))) == NULL) { 221 fprintf(stderr, "out of memory"); 222 exit (8); 223 } 224 dk = *dkp; 225 if ((dk->name = malloc(len + 1)) == NULL) { 226 fprintf(stderr, "out of memory"); 227 exit (8); 228 } 229 (void)strncpy(dk->name, name, len); 230 dk->name[len] = '\0'; 231 dk->part = NULL; 232 dk->next = NULL; 233 dk->pid = 0; 234 ndisks++; 235 return (dk); 236 } 237 238 static void 239 addpart(name, fsname, auxdata) 240 char *name, *fsname; 241 long auxdata; 242 { 243 struct disk *dk = finddisk(name); 244 register struct part *pt, **ppt = &dk->part; 245 246 for (pt = dk->part; pt; ppt = &pt->next, pt = pt->next) 247 if (strcmp(pt->name, name) == 0) { 248 printf("%s in fstab more than once!\n", name); 249 return; 250 } 251 if ((*ppt = (struct part *)malloc(sizeof(struct part))) == NULL) { 252 fprintf(stderr, "out of memory"); 253 exit (8); 254 } 255 pt = *ppt; 256 if ((pt->name = malloc(strlen(name) + 1)) == NULL) { 257 fprintf(stderr, "out of memory"); 258 exit (8); 259 } 260 (void)strcpy(pt->name, name); 261 if ((pt->fsname = malloc(strlen(fsname) + 1)) == NULL) { 262 fprintf(stderr, "out of memory"); 263 exit (8); 264 } 265 (void)strcpy(pt->fsname, fsname); 266 pt->next = NULL; 267 pt->auxdata = auxdata; 268 } 269 270 static int 271 startdisk(dk, checkit) 272 register struct disk *dk; 273 int (*checkit)(char *, char *, long, int); 274 { 275 register struct part *pt = dk->part; 276 277 dk->pid = fork(); 278 if (dk->pid < 0) { 279 perror("fork"); 280 return (8); 281 } 282 if (dk->pid == 0) 283 exit((*checkit)(pt->name, pt->fsname, pt->auxdata, 1)); 284 nrun++; 285 return (0); 286 } 287 288 char * 289 blockcheck(origname) 290 char *origname; 291 { 292 struct stat stslash, stblock, stchar; 293 char *newname, *raw; 294 struct fstab *fsinfo; 295 int retried = 0, l; 296 297 hotroot = 0; 298 if (stat("/", &stslash) < 0) { 299 perror("/"); 300 printf("Can't stat root\n"); 301 return (origname); 302 } 303 newname = origname; 304 retry: 305 if (stat(newname, &stblock) < 0) { 306 perror(newname); 307 printf("Can't stat %s\n", newname); 308 return (origname); 309 } 310 if ((stblock.st_mode & S_IFMT) == S_IFBLK) { 311 if (stslash.st_dev == stblock.st_rdev) 312 hotroot++; 313 raw = rawname(newname); 314 if (stat(raw, &stchar) < 0) { 315 perror(raw); 316 printf("Can't stat %s\n", raw); 317 return (origname); 318 } 319 if ((stchar.st_mode & S_IFMT) == S_IFCHR) { 320 return (raw); 321 } else { 322 printf("%s is not a character device\n", raw); 323 return (origname); 324 } 325 } else if ((stblock.st_mode & S_IFMT) == S_IFCHR && !retried) { 326 newname = unrawname(origname); 327 retried++; 328 goto retry; 329 } else if ((stblock.st_mode & S_IFMT) == S_IFDIR && !retried) { 330 l = strlen(origname) - 1; 331 if (l > 0 && origname[l] == '/') 332 /* remove trailing slash */ 333 origname[l] = '\0'; 334 if(!(fsinfo=getfsfile(origname))) { 335 printf("Can't resolve %s to character special device", 336 origname); 337 return (0); 338 } 339 newname = fsinfo->fs_spec; 340 retried++; 341 goto retry; 342 } 343 /* 344 * Not a block or character device, just return name and 345 * let the user decide whether to use it. 346 */ 347 return (origname); 348 } 349 350 static char * 351 unrawname(name) 352 char *name; 353 { 354 char *dp; 355 struct stat stb; 356 357 if ((dp = strrchr(name, '/')) == 0) 358 return (name); 359 if (stat(name, &stb) < 0) 360 return (name); 361 if ((stb.st_mode & S_IFMT) != S_IFCHR) 362 return (name); 363 if (dp[1] != 'r') 364 return (name); 365 (void)strcpy(&dp[1], &dp[2]); 366 return (name); 367 } 368 369 static char * 370 rawname(name) 371 char *name; 372 { 373 static char rawbuf[32]; 374 char *dp; 375 376 if ((dp = strrchr(name, '/')) == 0) 377 return (0); 378 *dp = 0; 379 (void)strcpy(rawbuf, name); 380 *dp = '/'; 381 (void)strcat(rawbuf, "/r"); 382 (void)strcat(rawbuf, &dp[1]); 383 return (rawbuf); 384 } 385