1 /* 2 * Copyright (c) 1983 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char sccsid[] = "@(#)dirs.c 5.15 (Berkeley) 02/26/91"; 10 #endif /* not lint */ 11 12 #include "restore.h" 13 #include <protocols/dumprestore.h> 14 #include <sys/file.h> 15 #include <ufs/dir.h> 16 #include "pathnames.h" 17 18 /* 19 * Symbol table of directories read from tape. 20 */ 21 #define HASHSIZE 1000 22 #define INOHASH(val) (val % HASHSIZE) 23 struct inotab { 24 struct inotab *t_next; 25 ino_t t_ino; 26 daddr_t t_seekpt; 27 long t_size; 28 }; 29 static struct inotab *inotab[HASHSIZE]; 30 extern struct inotab *inotablookup(); 31 extern struct inotab *allocinotab(); 32 33 /* 34 * Information retained about directories. 35 */ 36 struct modeinfo { 37 ino_t ino; 38 struct timeval timep[2]; 39 short mode; 40 short uid; 41 short gid; 42 }; 43 44 /* 45 * Definitions for library routines operating on directories. 46 */ 47 #undef DIRBLKSIZ 48 #define DIRBLKSIZ 1024 49 struct dirdesc { 50 int dd_fd; 51 long dd_loc; 52 long dd_size; 53 char dd_buf[DIRBLKSIZ]; 54 }; 55 extern DIR *opendirfile(); 56 extern off_t rst_telldir(); 57 extern void rst_seekdir(); 58 59 /* 60 * Global variables for this file. 61 */ 62 static daddr_t seekpt; 63 static FILE *df, *mf; 64 static DIR *dirp; 65 static char dirfile[32] = "#"; /* No file */ 66 static char modefile[32] = "#"; /* No file */ 67 static char dot[2] = "."; /* So it can be modified */ 68 extern ino_t search(); 69 struct direct *rst_readdir(); 70 extern void rst_seekdir(); 71 72 /* 73 * Format of old style directories. 74 */ 75 #define ODIRSIZ 14 76 struct odirect { 77 u_short d_ino; 78 char d_name[ODIRSIZ]; 79 }; 80 81 /* 82 * Extract directory contents, building up a directory structure 83 * on disk for extraction by name. 84 * If genmode is requested, save mode, owner, and times for all 85 * directories on the tape. 86 */ 87 extractdirs(genmode) 88 int genmode; 89 { 90 register int i; 91 register struct dinode *ip; 92 struct inotab *itp; 93 struct direct nulldir; 94 int putdir(), null(); 95 96 vprintf(stdout, "Extract directories from tape\n"); 97 (void) sprintf(dirfile, "%s/rstdir%d", _PATH_TMP, dumpdate); 98 df = fopen(dirfile, "w"); 99 if (df == 0) { 100 fprintf(stderr, 101 "restore: %s - cannot create directory temporary\n", 102 dirfile); 103 perror("fopen"); 104 done(1); 105 } 106 if (genmode != 0) { 107 (void) sprintf(modefile, "%s/rstmode%d", _PATH_TMP, dumpdate); 108 mf = fopen(modefile, "w"); 109 if (mf == 0) { 110 fprintf(stderr, 111 "restore: %s - cannot create modefile \n", 112 modefile); 113 perror("fopen"); 114 done(1); 115 } 116 } 117 nulldir.d_ino = 0; 118 nulldir.d_namlen = 1; 119 (void) strcpy(nulldir.d_name, "/"); 120 nulldir.d_reclen = DIRSIZ(&nulldir); 121 for (;;) { 122 curfile.name = "<directory file - name unknown>"; 123 curfile.action = USING; 124 ip = curfile.dip; 125 if (ip == NULL || (ip->di_mode & IFMT) != IFDIR) { 126 (void) fclose(df); 127 dirp = opendirfile(dirfile); 128 if (dirp == NULL) 129 perror("opendirfile"); 130 if (mf != NULL) 131 (void) fclose(mf); 132 i = dirlookup(dot); 133 if (i == 0) 134 panic("Root directory is not on tape\n"); 135 return; 136 } 137 itp = allocinotab(curfile.ino, ip, seekpt); 138 getfile(putdir, null); 139 putent(&nulldir); 140 flushent(); 141 itp->t_size = seekpt - itp->t_seekpt; 142 } 143 } 144 145 /* 146 * skip over all the directories on the tape 147 */ 148 skipdirs() 149 { 150 151 while ((curfile.dip->di_mode & IFMT) == IFDIR) { 152 skipfile(); 153 } 154 } 155 156 /* 157 * Recursively find names and inumbers of all files in subtree 158 * pname and pass them off to be processed. 159 */ 160 treescan(pname, ino, todo) 161 char *pname; 162 ino_t ino; 163 long (*todo)(); 164 { 165 register struct inotab *itp; 166 register struct direct *dp; 167 register struct entry *np; 168 int namelen; 169 daddr_t bpt; 170 char locname[MAXPATHLEN + 1]; 171 172 itp = inotablookup(ino); 173 if (itp == NULL) { 174 /* 175 * Pname is name of a simple file or an unchanged directory. 176 */ 177 (void) (*todo)(pname, ino, LEAF); 178 return; 179 } 180 /* 181 * Pname is a dumped directory name. 182 */ 183 if ((*todo)(pname, ino, NODE) == FAIL) 184 return; 185 /* 186 * begin search through the directory 187 * skipping over "." and ".." 188 */ 189 (void) strncpy(locname, pname, MAXPATHLEN); 190 (void) strncat(locname, "/", MAXPATHLEN); 191 namelen = strlen(locname); 192 rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt); 193 dp = rst_readdir(dirp); /* "." */ 194 if (dp != NULL && strcmp(dp->d_name, ".") == 0) 195 dp = rst_readdir(dirp); /* ".." */ 196 else 197 fprintf(stderr, "Warning: `.' missing from directory %s\n", 198 pname); 199 if (dp != NULL && strcmp(dp->d_name, "..") == 0) 200 dp = rst_readdir(dirp); /* first real entry */ 201 else 202 fprintf(stderr, "Warning: `..' missing from directory %s\n", 203 pname); 204 bpt = rst_telldir(dirp); 205 /* 206 * a zero inode signals end of directory 207 */ 208 while (dp != NULL && dp->d_ino != 0) { 209 locname[namelen] = '\0'; 210 if (namelen + dp->d_namlen >= MAXPATHLEN) { 211 fprintf(stderr, "%s%s: name exceeds %d char\n", 212 locname, dp->d_name, MAXPATHLEN); 213 } else { 214 (void) strncat(locname, dp->d_name, (int)dp->d_namlen); 215 treescan(locname, dp->d_ino, todo); 216 rst_seekdir(dirp, bpt, itp->t_seekpt); 217 } 218 dp = rst_readdir(dirp); 219 bpt = rst_telldir(dirp); 220 } 221 if (dp == NULL) 222 fprintf(stderr, "corrupted directory: %s.\n", locname); 223 } 224 225 /* 226 * Search the directory tree rooted at inode ROOTINO 227 * for the path pointed at by n 228 */ 229 ino_t 230 psearch(n) 231 char *n; 232 { 233 register char *cp, *cp1; 234 ino_t ino; 235 char c; 236 237 ino = ROOTINO; 238 if (*(cp = n) == '/') 239 cp++; 240 next: 241 cp1 = cp + 1; 242 while (*cp1 != '/' && *cp1) 243 cp1++; 244 c = *cp1; 245 *cp1 = 0; 246 ino = search(ino, cp); 247 if (ino == 0) { 248 *cp1 = c; 249 return(0); 250 } 251 *cp1 = c; 252 if (c == '/') { 253 cp = cp1+1; 254 goto next; 255 } 256 return(ino); 257 } 258 259 /* 260 * search the directory inode ino 261 * looking for entry cp 262 */ 263 ino_t 264 search(inum, cp) 265 ino_t inum; 266 char *cp; 267 { 268 register struct direct *dp; 269 register struct inotab *itp; 270 int len; 271 272 itp = inotablookup(inum); 273 if (itp == NULL) 274 return(0); 275 rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt); 276 len = strlen(cp); 277 do { 278 dp = rst_readdir(dirp); 279 if (dp == NULL || dp->d_ino == 0) 280 return (0); 281 } while (dp->d_namlen != len || strncmp(dp->d_name, cp, len) != 0); 282 return(dp->d_ino); 283 } 284 285 /* 286 * Put the directory entries in the directory file 287 */ 288 putdir(buf, size) 289 char *buf; 290 int size; 291 { 292 struct direct cvtbuf; 293 register struct odirect *odp; 294 struct odirect *eodp; 295 register struct direct *dp; 296 long loc, i; 297 extern int Bcvt; 298 299 if (cvtflag) { 300 eodp = (struct odirect *)&buf[size]; 301 for (odp = (struct odirect *)buf; odp < eodp; odp++) 302 if (odp->d_ino != 0) { 303 dcvt(odp, &cvtbuf); 304 putent(&cvtbuf); 305 } 306 } else { 307 for (loc = 0; loc < size; ) { 308 dp = (struct direct *)(buf + loc); 309 if (Bcvt) { 310 swabst("l2s", (char *) dp); 311 } 312 i = DIRBLKSIZ - (loc & (DIRBLKSIZ - 1)); 313 if ((dp->d_reclen & 0x3) != 0 || 314 dp->d_reclen > i || 315 dp->d_reclen < DIRSIZ(dp) || 316 dp->d_namlen > MAXNAMLEN) { 317 vprintf(stdout, "Mangled directory\n"); 318 loc += i; 319 continue; 320 } 321 loc += dp->d_reclen; 322 if (dp->d_ino != 0) { 323 putent(dp); 324 } 325 } 326 } 327 } 328 329 /* 330 * These variables are "local" to the following two functions. 331 */ 332 char dirbuf[DIRBLKSIZ]; 333 long dirloc = 0; 334 long prev = 0; 335 336 /* 337 * add a new directory entry to a file. 338 */ 339 putent(dp) 340 struct direct *dp; 341 { 342 dp->d_reclen = DIRSIZ(dp); 343 if (dirloc + dp->d_reclen > DIRBLKSIZ) { 344 ((struct direct *)(dirbuf + prev))->d_reclen = 345 DIRBLKSIZ - prev; 346 (void) fwrite(dirbuf, 1, DIRBLKSIZ, df); 347 dirloc = 0; 348 } 349 bcopy((char *)dp, dirbuf + dirloc, (long)dp->d_reclen); 350 prev = dirloc; 351 dirloc += dp->d_reclen; 352 } 353 354 /* 355 * flush out a directory that is finished. 356 */ 357 flushent() 358 { 359 360 ((struct direct *)(dirbuf + prev))->d_reclen = DIRBLKSIZ - prev; 361 (void) fwrite(dirbuf, (int)dirloc, 1, df); 362 seekpt = ftell(df); 363 dirloc = 0; 364 } 365 366 dcvt(odp, ndp) 367 register struct odirect *odp; 368 register struct direct *ndp; 369 { 370 371 bzero((char *)ndp, (long)(sizeof *ndp)); 372 ndp->d_ino = odp->d_ino; 373 (void) strncpy(ndp->d_name, odp->d_name, ODIRSIZ); 374 ndp->d_namlen = strlen(ndp->d_name); 375 ndp->d_reclen = DIRSIZ(ndp); 376 } 377 378 /* 379 * Seek to an entry in a directory. 380 * Only values returned by rst_telldir should be passed to rst_seekdir. 381 * This routine handles many directories in a single file. 382 * It takes the base of the directory in the file, plus 383 * the desired seek offset into it. 384 */ 385 void 386 rst_seekdir(dirp, loc, base) 387 register DIR *dirp; 388 daddr_t loc, base; 389 { 390 391 if (loc == rst_telldir(dirp)) 392 return; 393 loc -= base; 394 if (loc < 0) 395 fprintf(stderr, "bad seek pointer to rst_seekdir %d\n", loc); 396 (void) lseek(dirp->dd_fd, base + (loc & ~(DIRBLKSIZ - 1)), 0); 397 dirp->dd_loc = loc & (DIRBLKSIZ - 1); 398 if (dirp->dd_loc != 0) 399 dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ); 400 } 401 402 /* 403 * get next entry in a directory. 404 */ 405 struct direct * 406 rst_readdir(dirp) 407 register DIR *dirp; 408 { 409 register struct direct *dp; 410 411 for (;;) { 412 if (dirp->dd_loc == 0) { 413 dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf, 414 DIRBLKSIZ); 415 if (dirp->dd_size <= 0) { 416 dprintf(stderr, "error reading directory\n"); 417 return NULL; 418 } 419 } 420 if (dirp->dd_loc >= dirp->dd_size) { 421 dirp->dd_loc = 0; 422 continue; 423 } 424 dp = (struct direct *)(dirp->dd_buf + dirp->dd_loc); 425 if (dp->d_reclen == 0 || 426 dp->d_reclen > DIRBLKSIZ + 1 - dirp->dd_loc) { 427 dprintf(stderr, "corrupted directory: bad reclen %d\n", 428 dp->d_reclen); 429 return NULL; 430 } 431 dirp->dd_loc += dp->d_reclen; 432 if (dp->d_ino == 0 && strcmp(dp->d_name, "/") != 0) 433 continue; 434 if (dp->d_ino >= maxino) { 435 dprintf(stderr, "corrupted directory: bad inum %d\n", 436 dp->d_ino); 437 continue; 438 } 439 return (dp); 440 } 441 } 442 443 /* 444 * Simulate the opening of a directory 445 */ 446 DIR * 447 rst_opendir(name) 448 char *name; 449 { 450 struct inotab *itp; 451 ino_t ino; 452 453 if ((ino = dirlookup(name)) > 0 && 454 (itp = inotablookup(ino)) != NULL) { 455 rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt); 456 return (dirp); 457 } 458 return (0); 459 } 460 461 /* 462 * Simulate finding the current offset in the directory. 463 */ 464 off_t 465 rst_telldir(dirp) 466 DIR *dirp; 467 { 468 off_t lseek(); 469 470 return (lseek(dirp->dd_fd, 0L, 1) - dirp->dd_size + dirp->dd_loc); 471 } 472 473 /* 474 * Open a directory file. 475 */ 476 DIR * 477 opendirfile(name) 478 char *name; 479 { 480 register DIR *dirp; 481 register int fd; 482 483 if ((fd = open(name, 0)) == -1) 484 return NULL; 485 if ((dirp = (DIR *)malloc(sizeof(DIR))) == NULL) { 486 close (fd); 487 return NULL; 488 } 489 dirp->dd_fd = fd; 490 dirp->dd_loc = 0; 491 return dirp; 492 } 493 494 /* 495 * Set the mode, owner, and times for all new or changed directories 496 */ 497 setdirmodes() 498 { 499 FILE *mf; 500 struct modeinfo node; 501 struct entry *ep; 502 char *cp; 503 504 vprintf(stdout, "Set directory mode, owner, and times.\n"); 505 (void) sprintf(modefile, "%s/rstmode%d", _PATH_TMP, dumpdate); 506 mf = fopen(modefile, "r"); 507 if (mf == NULL) { 508 perror("fopen"); 509 fprintf(stderr, "cannot open mode file %s\n", modefile); 510 fprintf(stderr, "directory mode, owner, and times not set\n"); 511 return; 512 } 513 clearerr(mf); 514 for (;;) { 515 (void) fread((char *)&node, 1, sizeof(struct modeinfo), mf); 516 if (feof(mf)) 517 break; 518 ep = lookupino(node.ino); 519 if (command == 'i' || command == 'x') { 520 if (ep == NIL) 521 continue; 522 if (ep->e_flags & EXISTED) { 523 ep->e_flags &= ~NEW; 524 continue; 525 } 526 if (node.ino == ROOTINO && 527 reply("set owner/mode for '.'") == FAIL) 528 continue; 529 } 530 if (ep == NIL) { 531 panic("cannot find directory inode %d\n", node.ino); 532 } else { 533 cp = myname(ep); 534 (void) chown(cp, node.uid, node.gid); 535 (void) chmod(cp, node.mode); 536 utimes(cp, node.timep); 537 ep->e_flags &= ~NEW; 538 } 539 } 540 if (ferror(mf)) 541 panic("error setting directory modes\n"); 542 (void) fclose(mf); 543 } 544 545 /* 546 * Generate a literal copy of a directory. 547 */ 548 genliteraldir(name, ino) 549 char *name; 550 ino_t ino; 551 { 552 register struct inotab *itp; 553 int ofile, dp, i, size; 554 char buf[BUFSIZ]; 555 556 itp = inotablookup(ino); 557 if (itp == NULL) 558 panic("Cannot find directory inode %d named %s\n", ino, name); 559 if ((ofile = creat(name, 0666)) < 0) { 560 fprintf(stderr, "%s: ", name); 561 (void) fflush(stderr); 562 perror("cannot create file"); 563 return (FAIL); 564 } 565 rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt); 566 dp = dup(dirp->dd_fd); 567 for (i = itp->t_size; i > 0; i -= BUFSIZ) { 568 size = i < BUFSIZ ? i : BUFSIZ; 569 if (read(dp, buf, (int) size) == -1) { 570 fprintf(stderr, 571 "write error extracting inode %d, name %s\n", 572 curfile.ino, curfile.name); 573 perror("read"); 574 done(1); 575 } 576 if (!Nflag && write(ofile, buf, (int) size) == -1) { 577 fprintf(stderr, 578 "write error extracting inode %d, name %s\n", 579 curfile.ino, curfile.name); 580 perror("write"); 581 done(1); 582 } 583 } 584 (void) close(dp); 585 (void) close(ofile); 586 return (GOOD); 587 } 588 589 /* 590 * Determine the type of an inode 591 */ 592 inodetype(ino) 593 ino_t ino; 594 { 595 struct inotab *itp; 596 597 itp = inotablookup(ino); 598 if (itp == NULL) 599 return (LEAF); 600 return (NODE); 601 } 602 603 /* 604 * Allocate and initialize a directory inode entry. 605 * If requested, save its pertinent mode, owner, and time info. 606 */ 607 struct inotab * 608 allocinotab(ino, dip, seekpt) 609 ino_t ino; 610 struct dinode *dip; 611 daddr_t seekpt; 612 { 613 register struct inotab *itp; 614 struct modeinfo node; 615 616 itp = (struct inotab *)calloc(1, sizeof(struct inotab)); 617 if (itp == 0) 618 panic("no memory directory table\n"); 619 itp->t_next = inotab[INOHASH(ino)]; 620 inotab[INOHASH(ino)] = itp; 621 itp->t_ino = ino; 622 itp->t_seekpt = seekpt; 623 if (mf == NULL) 624 return(itp); 625 node.ino = ino; 626 node.timep[0].tv_sec = dip->di_atime; 627 node.timep[0].tv_usec = 0; 628 node.timep[1].tv_sec = dip->di_mtime; 629 node.timep[1].tv_usec = 0; 630 node.mode = dip->di_mode; 631 node.uid = dip->di_uid; 632 node.gid = dip->di_gid; 633 (void) fwrite((char *)&node, 1, sizeof(struct modeinfo), mf); 634 return(itp); 635 } 636 637 /* 638 * Look up an inode in the table of directories 639 */ 640 struct inotab * 641 inotablookup(ino) 642 ino_t ino; 643 { 644 register struct inotab *itp; 645 646 for (itp = inotab[INOHASH(ino)]; itp != NULL; itp = itp->t_next) 647 if (itp->t_ino == ino) 648 return(itp); 649 return ((struct inotab *)0); 650 } 651 652 /* 653 * Clean up and exit 654 */ 655 done(exitcode) 656 int exitcode; 657 { 658 659 closemt(); 660 if (modefile[0] != '#') 661 (void) unlink(modefile); 662 if (dirfile[0] != '#') 663 (void) unlink(dirfile); 664 exit(exitcode); 665 } 666