sbin/restore/dirs.c

   1 /*
   2  * Copyright (c) 1983, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  * (c) UNIX System Laboratories, Inc.
   5  * All or some portions of this file are derived from material licensed
   6  * to the University of California by American Telephone and Telegraph
   7  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
   8  * the permission of UNIX System Laboratories, Inc.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  * @(#)dirs.c   8.7 (Berkeley) 5/1/95
  35  * $FreeBSD: src/sbin/restore/dirs.c,v 1.14.2.5 2001/10/15 13:44:45 dd Exp $
  36  * $DragonFly: src/sbin/restore/dirs.c,v 1.10 2006/04/03 01:58:49 dillon Exp $
  37  */
  38
  39 #include <sys/param.h>
  40 #include <sys/file.h>
  41 #include <sys/stat.h>
  42 #include <sys/time.h>
  43
  44 #include <vfs/ufs/dinode.h>
  45 #include <vfs/ufs/dir.h>
  46 #include <protocols/dumprestore.h>
  47
  48 #include <err.h>
  49 #include <errno.h>
  50 #include <paths.h>
  51 #include <stdio.h>
  52 #include <stdlib.h>
  53 #include <string.h>
  54 #include <unistd.h>
  55
  56 #include "restore.h"
  57 #include "extern.h"
  58
  59 /*
  60  * Symbol table of directories read from tape.
  61  */
  62 #define HASHSIZE        1000
  63 #define INOHASH(val) (val % HASHSIZE)
  64 struct inotab {
  65         struct  inotab *t_next;
  66         ufs1_ino_t      t_ino;
  67         int32_t t_seekpt;
  68         int32_t t_size;
  69 };
  70 static struct inotab *inotab[HASHSIZE];
  71
  72 /*
  73  * Information retained about directories.
  74  */
  75 struct modeinfo {
  76         ufs1_ino_t ino;
  77         struct timeval timep[2];
  78         mode_t mode;
  79         uid_t uid;
  80         gid_t gid;
  81         int flags;
  82 };
  83
  84 /*
  85  * Definitions for library routines operating on directories.
  86  */
  87 #undef DIRBLKSIZ
  88 #define DIRBLKSIZ 1024
  89 struct rstdirdesc {
  90         int     dd_fd;
  91         int32_t dd_loc;
  92         int32_t dd_size;
  93         char    dd_buf[DIRBLKSIZ];
  94 };
  95
  96 /*
  97  * Global variables for this file.
  98  */
  99 static long     seekpt;
 100 static FILE     *df, *mf;
 101 static RST_DIR  *dirp;
 102 static char     dirfile[MAXPATHLEN] = "#";      /* No file */
 103 static char     modefile[MAXPATHLEN] = "#";     /* No file */
 104 static char     dot[2] = ".";                   /* So it can be modified */
 105
 106 /*
 107  * Format of old style directories.
 108  */
 109 #define ODIRSIZ 14
 110 struct odirect {
 111         u_short d_ino;
 112         char    d_name[ODIRSIZ];
 113 };
 114
 115 static struct inotab    *allocinotab(ufs1_ino_t, struct ufs1_dinode *, long);
 116 static void              dcvt(struct odirect *, struct direct *);
 117 static void              flushent(void);
 118 static struct inotab    *inotablookup(ufs1_ino_t);
 119 static RST_DIR          *opendirfile(const char *);
 120 static void              putdir(char *, long);
 121 static void              putent(struct direct *);
 122 static void              rst_seekdir(RST_DIR *, long, long);
 123 static long              rst_telldir(RST_DIR *);
 124 static struct direct    *searchdir(ufs1_ino_t, char *);
 125
 126 /*
 127  *      Extract directory contents, building up a directory structure
 128  *      on disk for extraction by name.
 129  *      If genmode is requested, save mode, owner, and times for all
 130  *      directories on the tape.
 131  */
 132 void
 133 extractdirs(int genmode)
 134 {
 135         int i;
 136         struct ufs1_dinode *ip;
 137         struct inotab *itp;
 138         struct direct nulldir;
 139         int fd;
 140         const char *tmpdir;
 141
 142         vprintf(stdout, "Extract directories from tape\n");
 143         if ((tmpdir = getenv("TMPDIR")) == NULL || tmpdir[0] == '\0')
 144                 tmpdir = _PATH_TMP;
 145         sprintf(dirfile, "%s/rstdir%ld", tmpdir, (long)dumpdate);
 146         if (command != 'r' && command != 'R') {
 147                 (void *) strcat(dirfile, "-XXXXXX");
 148                 fd = mkstemp(dirfile);
 149         } else
 150                 fd = open(dirfile, O_RDWR|O_CREAT|O_EXCL, 0666);
 151         if (fd == -1 || (df = fdopen(fd, "w")) == NULL) {
 152                 if (fd != -1)
 153                         close(fd);
 154                 warn("%s - cannot create directory temporary\nfopen", dirfile);
 155                 done(1);
 156         }
 157         if (genmode != 0) {
 158                 sprintf(modefile, "%s/rstmode%ld", tmpdir, (long)dumpdate);
 159                 if (command != 'r' && command != 'R') {
 160                         (void *) strcat(modefile, "-XXXXXX");
 161                         fd = mkstemp(modefile);
 162                 } else
 163                         fd = open(modefile, O_RDWR|O_CREAT|O_EXCL, 0666);
 164                 if (fd == -1 || (mf = fdopen(fd, "w")) == NULL) {
 165                         if (fd != -1)
 166                                 close(fd);
 167                         warn("%s - cannot create modefile\nfopen", modefile);
 168                         done(1);
 169                 }
 170         }
 171         nulldir.d_ino = 0;
 172         nulldir.d_type = DT_DIR;
 173         nulldir.d_namlen = 1;
 174         strcpy(nulldir.d_name, "/");
 175         nulldir.d_reclen = DIRSIZ(0, &nulldir);
 176         for (;;) {
 177                 curfile.name = "<directory file - name unknown>";
 178                 curfile.action = USING;
 179                 ip = curfile.dip;
 180                 if (ip == NULL || (ip->di_mode & IFMT) != IFDIR) {
 181                         fclose(df);
 182                         dirp = opendirfile(dirfile);
 183                         if (dirp == NULL)
 184                                 fprintf(stderr, "opendirfile: %s\n",
 185                                     strerror(errno));
 186                         if (mf != NULL)
 187                                 fclose(mf);
 188                         i = dirlookup(dot);
 189                         if (i == 0)
 190                                 panic("Root directory is not on tape\n");
 191                         return;
 192                 }
 193                 itp = allocinotab(curfile.ino, ip, seekpt);
 194                 getfile(putdir, xtrnull);
 195                 putent(&nulldir);
 196                 flushent();
 197                 itp->t_size = seekpt - itp->t_seekpt;
 198         }
 199 }
 200
 201 /*
 202  * skip over all the directories on the tape
 203  */
 204 void
 205 skipdirs(void)
 206 {
 207
 208         while (curfile.dip && (curfile.dip->di_mode & IFMT) == IFDIR) {
 209                 skipfile();
 210         }
 211 }
 212
 213 /*
 214  *      Recursively find names and inumbers of all files in subtree
 215  *      pname and pass them off to be processed.
 216  */
 217 void
 218 treescan(char *pname, ufs1_ino_t ino, long (*todo) (char *, ufs1_ino_t, int))
 219 {
 220         struct inotab *itp;
 221         struct direct *dp;
 222         int namelen;
 223         long bpt;
 224         char locname[MAXPATHLEN + 1];
 225
 226         itp = inotablookup(ino);
 227         if (itp == NULL) {
 228                 /*
 229                  * Pname is name of a simple file or an unchanged directory.
 230                  */
 231                 (*todo)(pname, ino, LEAF);
 232                 return;
 233         }
 234         /*
 235          * Pname is a dumped directory name.
 236          */
 237         if ((*todo)(pname, ino, NODE) == FAIL)
 238                 return;
 239         /*
 240          * begin search through the directory
 241          * skipping over "." and ".."
 242          */
 243         strncpy(locname, pname, sizeof(locname) - 1);
 244         locname[sizeof(locname) - 1] = '\0';
 245         strncat(locname, "/", sizeof(locname) - strlen(locname));
 246         namelen = strlen(locname);
 247         rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 248         dp = rst_readdir(dirp); /* "." */
 249         if (dp != NULL && strcmp(dp->d_name, ".") == 0)
 250                 dp = rst_readdir(dirp); /* ".." */
 251         else
 252                 fprintf(stderr, "Warning: `.' missing from directory %s\n",
 253                         pname);
 254         if (dp != NULL && strcmp(dp->d_name, "..") == 0)
 255                 dp = rst_readdir(dirp); /* first real entry */
 256         else
 257                 fprintf(stderr, "Warning: `..' missing from directory %s\n",
 258                         pname);
 259         bpt = rst_telldir(dirp);
 260         /*
 261          * a zero inode signals end of directory
 262          */
 263         while (dp != NULL) {
 264                 locname[namelen] = '\0';
 265                 if (namelen + dp->d_namlen >= sizeof(locname)) {
 266                         fprintf(stderr, "%s%s: name exceeds %d char\n",
 267                                 locname, dp->d_name, sizeof(locname) - 1);
 268                 } else {
 269                         strncat(locname, dp->d_name, (int)dp->d_namlen);
 270                         treescan(locname, dp->d_ino, todo);
 271                         rst_seekdir(dirp, bpt, itp->t_seekpt);
 272                 }
 273                 dp = rst_readdir(dirp);
 274                 bpt = rst_telldir(dirp);
 275         }
 276 }
 277
 278 /*
 279  * Lookup a pathname which is always assumed to start from the ROOTINO.
 280  */
 281 struct direct *
 282 pathsearch(const char *pathname)
 283 {
 284         ufs1_ino_t ino;
 285         struct direct *dp;
 286         char *path, *name, buffer[MAXPATHLEN];
 287
 288         strcpy(buffer, pathname);
 289         path = buffer;
 290         ino = ROOTINO;
 291         while (*path == '/')
 292                 path++;
 293         dp = NULL;
 294         while ((name = strsep(&path, "/")) != NULL && *name != '\0') {
 295                 if ((dp = searchdir(ino, name)) == NULL)
 296                         return (NULL);
 297                 ino = dp->d_ino;
 298         }
 299         return (dp);
 300 }
 301
 302 /*
 303  * Lookup the requested name in directory inum.
 304  * Return its inode number if found, zero if it does not exist.
 305  */
 306 static struct direct *
 307 searchdir(ufs1_ino_t inum, char *name)
 308 {
 309         struct direct *dp;
 310         struct inotab *itp;
 311         int len;
 312
 313         itp = inotablookup(inum);
 314         if (itp == NULL)
 315                 return (NULL);
 316         rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 317         len = strlen(name);
 318         do {
 319                 dp = rst_readdir(dirp);
 320                 if (dp == NULL)
 321                         return (NULL);
 322         } while (dp->d_namlen != len || strncmp(dp->d_name, name, len) != 0);
 323         return (dp);
 324 }
 325
 326 /*
 327  * Put the directory entries in the directory file
 328  */
 329 static void
 330 putdir(char *buf, long size)
 331 {
 332         struct direct cvtbuf;
 333         struct odirect *odp;
 334         struct odirect *eodp;
 335         struct direct *dp;
 336         long loc, i;
 337
 338         if (cvtflag) {
 339                 eodp = (struct odirect *)&buf[size];
 340                 for (odp = (struct odirect *)buf; odp < eodp; odp++)
 341                         if (odp->d_ino != 0) {
 342                                 dcvt(odp, &cvtbuf);
 343                                 putent(&cvtbuf);
 344                         }
 345         } else {
 346                 for (loc = 0; loc < size; ) {
 347                         dp = (struct direct *)(buf + loc);
 348                         if (Bcvt)
 349                                 swabst((u_char *)"ls", (u_char *) dp);
 350                         if (oldinofmt && dp->d_ino != 0) {
 351 #                               if BYTE_ORDER == BIG_ENDIAN
 352                                         if (Bcvt)
 353                                                 dp->d_namlen = dp->d_type;
 354 #                               else
 355                                         if (!Bcvt)
 356                                                 dp->d_namlen = dp->d_type;
 357 #                               endif
 358                                 dp->d_type = DT_UNKNOWN;
 359                         }
 360                         i = DIRBLKSIZ - (loc & (DIRBLKSIZ - 1));
 361                         if ((dp->d_reclen & 0x3) != 0 ||
 362                             dp->d_reclen > i ||
 363                             dp->d_reclen < DIRSIZ(0, dp) ||
 364                             dp->d_namlen > NAME_MAX) {
 365                                 vprintf(stdout, "Mangled directory: ");
 366                                 if ((dp->d_reclen & 0x3) != 0)
 367                                         vprintf(stdout,
 368                                            "reclen not multiple of 4 ");
 369                                 if (dp->d_reclen < DIRSIZ(0, dp))
 370                                         vprintf(stdout,
 371                                            "reclen less than DIRSIZ (%d < %d) ",
 372                                            dp->d_reclen, DIRSIZ(0, dp));
 373                                 if (dp->d_namlen > NAME_MAX)
 374                                         vprintf(stdout,
 375                                            "reclen name too big (%d > %d) ",
 376                                            dp->d_namlen, NAME_MAX);
 377                                 vprintf(stdout, "\n");
 378                                 loc += i;
 379                                 continue;
 380                         }
 381                         loc += dp->d_reclen;
 382                         if (dp->d_ino != 0) {
 383                                 putent(dp);
 384                         }
 385                 }
 386         }
 387 }
 388
 389 /*
 390  * These variables are "local" to the following two functions.
 391  */
 392 char dirbuf[DIRBLKSIZ];
 393 long dirloc = 0;
 394 long prev = 0;
 395
 396 /*
 397  * add a new directory entry to a file.
 398  */
 399 static void
 400 putent(struct direct *dp)
 401 {
 402         dp->d_reclen = DIRSIZ(0, dp);
 403         if (dirloc + dp->d_reclen > DIRBLKSIZ) {
 404                 ((struct direct *)(dirbuf + prev))->d_reclen =
 405                     DIRBLKSIZ - prev;
 406                 fwrite(dirbuf, 1, DIRBLKSIZ, df);
 407                 dirloc = 0;
 408         }
 409         memmove(dirbuf + dirloc, dp, (long)dp->d_reclen);
 410         prev = dirloc;
 411         dirloc += dp->d_reclen;
 412 }
 413
 414 /*
 415  * flush out a directory that is finished.
 416  */
 417 static void
 418 flushent(void)
 419 {
 420         ((struct direct *)(dirbuf + prev))->d_reclen = DIRBLKSIZ - prev;
 421         fwrite(dirbuf, (int)dirloc, 1, df);
 422         seekpt = ftell(df);
 423         dirloc = 0;
 424 }
 425
 426 static void
 427 dcvt(struct odirect *odp, struct direct *ndp)
 428 {
 429
 430         memset(ndp, 0, (long)(sizeof *ndp));
 431         ndp->d_ino =  odp->d_ino;
 432         ndp->d_type = DT_UNKNOWN;
 433         strncpy(ndp->d_name, odp->d_name, ODIRSIZ);
 434         ndp->d_namlen = strlen(ndp->d_name);
 435         ndp->d_reclen = DIRSIZ(0, ndp);
 436 }
 437
 438 /*
 439  * Seek to an entry in a directory.
 440  * Only values returned by rst_telldir should be passed to rst_seekdir.
 441  * This routine handles many directories in a single file.
 442  * It takes the base of the directory in the file, plus
 443  * the desired seek offset into it.
 444  */
 445 static void
 446 rst_seekdir(RST_DIR *dirp, long loc, long base)
 447 {
 448
 449         if (loc == rst_telldir(dirp))
 450                 return;
 451         loc -= base;
 452         if (loc < 0)
 453                 fprintf(stderr, "bad seek pointer to rst_seekdir %ld\n", loc);
 454         lseek(dirp->dd_fd, base + (loc & ~(DIRBLKSIZ - 1)), SEEK_SET);
 455         dirp->dd_loc = loc & (DIRBLKSIZ - 1);
 456         if (dirp->dd_loc != 0)
 457                 dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ);
 458 }
 459
 460 /*
 461  * get next entry in a directory.
 462  */
 463 struct direct *
 464 rst_readdir(RST_DIR *dirp)
 465 {
 466         struct direct *dp;
 467
 468         for (;;) {
 469                 if (dirp->dd_loc == 0) {
 470                         dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf,
 471                             DIRBLKSIZ);
 472                         if (dirp->dd_size <= 0) {
 473                                 dprintf(stderr, "error reading directory\n");
 474                                 return (NULL);
 475                         }
 476                 }
 477                 if (dirp->dd_loc >= dirp->dd_size) {
 478                         dirp->dd_loc = 0;
 479                         continue;
 480                 }
 481                 dp = (struct direct *)(dirp->dd_buf + dirp->dd_loc);
 482                 if (dp->d_reclen == 0 ||
 483                     dp->d_reclen > DIRBLKSIZ + 1 - dirp->dd_loc) {
 484                         dprintf(stderr, "corrupted directory: bad reclen %d\n",
 485                                 dp->d_reclen);
 486                         return (NULL);
 487                 }
 488                 dirp->dd_loc += dp->d_reclen;
 489                 if (dp->d_ino == 0 && strcmp(dp->d_name, "/") == 0)
 490                         return (NULL);
 491                 if (dp->d_ino >= maxino) {
 492                         dprintf(stderr, "corrupted directory: bad inum %d\n",
 493                                 dp->d_ino);
 494                         continue;
 495                 }
 496                 return (dp);
 497         }
 498 }
 499
 500 /*
 501  * Simulate the opening of a directory
 502  */
 503 RST_DIR *
 504 rst_opendir(const char *name)
 505 {
 506         struct inotab *itp;
 507         RST_DIR *dirp;
 508         ufs1_ino_t ino;
 509
 510         if ((ino = dirlookup(name)) > 0 &&
 511             (itp = inotablookup(ino)) != NULL) {
 512                 dirp = opendirfile(dirfile);
 513                 rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 514                 return (dirp);
 515         }
 516         return (NULL);
 517 }
 518
 519 /*
 520  * In our case, there is nothing to do when closing a directory.
 521  */
 522 void
 523 rst_closedir(RST_DIR *dirp)
 524 {
 525
 526         close(dirp->dd_fd);
 527         free(dirp);
 528         return;
 529 }
 530
 531 /*
 532  * Simulate finding the current offset in the directory.
 533  */
 534 static long
 535 rst_telldir(RST_DIR *dirp)
 536 {
 537         return ((long)lseek(dirp->dd_fd,
 538             (off_t)0, SEEK_CUR) - dirp->dd_size + dirp->dd_loc);
 539 }
 540
 541 /*
 542  * Open a directory file.
 543  */
 544 static RST_DIR *
 545 opendirfile(const char *name)
 546 {
 547         RST_DIR *dirp;
 548         int fd;
 549
 550         if ((fd = open(name, O_RDONLY)) == -1)
 551                 return (NULL);
 552         if ((dirp = malloc(sizeof(RST_DIR))) == NULL) {
 553                 close(fd);
 554                 return (NULL);
 555         }
 556         dirp->dd_fd = fd;
 557         dirp->dd_loc = 0;
 558         return (dirp);
 559 }
 560
 561 /*
 562  * Set the mode, owner, and times for all new or changed directories
 563  */
 564 void
 565 setdirmodes(int flags)
 566 {
 567         FILE *mf;
 568         struct modeinfo node;
 569         struct entry *ep;
 570         char *cp;
 571         const char *tmpdir;
 572
 573         vprintf(stdout, "Set directory mode, owner, and times.\n");
 574         if ((tmpdir = getenv("TMPDIR")) == NULL || tmpdir[0] == '\0')
 575                 tmpdir = _PATH_TMP;
 576         if (command == 'r' || command == 'R')
 577                 sprintf(modefile, "%s/rstmode%ld", tmpdir, (long)dumpdate);
 578         if (modefile[0] == '#') {
 579                 panic("modefile not defined\n");
 580                 fprintf(stderr, "directory mode, owner, and times not set\n");
 581                 return;
 582         }
 583         mf = fopen(modefile, "r");
 584         if (mf == NULL) {
 585                 fprintf(stderr, "fopen: %s\n", strerror(errno));
 586                 fprintf(stderr, "cannot open mode file %s\n", modefile);
 587                 fprintf(stderr, "directory mode, owner, and times not set\n");
 588                 return;
 589         }
 590         clearerr(mf);
 591         for (;;) {
 592                 fread((char *)&node, 1, sizeof(struct modeinfo), mf);
 593                 if (feof(mf))
 594                         break;
 595                 ep = lookupino(node.ino);
 596                 if (command == 'i' || command == 'x') {
 597                         if (ep == NULL)
 598                                 continue;
 599                         if ((flags & FORCE) == 0 && ep->e_flags & EXISTED) {
 600                                 ep->e_flags &= ~NEW;
 601                                 continue;
 602                         }
 603                         if (node.ino == ROOTINO &&
 604                             reply("set owner/mode for '.'") == FAIL)
 605                                 continue;
 606                 }
 607                 if (ep == NULL) {
 608                         panic("cannot find directory inode %d\n", node.ino);
 609                 } else {
 610                         cp = myname(ep);
 611                         if (!Nflag) {
 612                                 chown(cp, node.uid, node.gid);
 613                                 chmod(cp, node.mode);
 614                                 utimes(cp, node.timep);
 615                                 chflags(cp, node.flags);
 616                         }
 617                         ep->e_flags &= ~NEW;
 618                 }
 619         }
 620         if (ferror(mf))
 621                 panic("error setting directory modes\n");
 622         fclose(mf);
 623 }
 624
 625 /*
 626  * Generate a literal copy of a directory.
 627  */
 628 int
 629 genliteraldir(char *name, ufs1_ino_t ino)
 630 {
 631         struct inotab *itp;
 632         int ofile, dp, i, size;
 633         char buf[BUFSIZ];
 634
 635         itp = inotablookup(ino);
 636         if (itp == NULL)
 637                 panic("Cannot find directory inode %d named %s\n", ino, name);
 638         if ((ofile = open(name, O_WRONLY | O_CREAT | O_TRUNC, 0666)) < 0) {
 639                 fprintf(stderr, "%s: ", name);
 640                 fflush(stderr);
 641                 fprintf(stderr, "cannot create file: %s\n", strerror(errno));
 642                 return (FAIL);
 643         }
 644         rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 645         dp = dup(dirp->dd_fd);
 646         for (i = itp->t_size; i > 0; i -= BUFSIZ) {
 647                 size = i < BUFSIZ ? i : BUFSIZ;
 648                 if (read(dp, buf, (int) size) == -1) {
 649                         fprintf(stderr,
 650                                 "write error extracting inode %d, name %s\n",
 651                                 curfile.ino, curfile.name);
 652                         fprintf(stderr, "read: %s\n", strerror(errno));
 653                         done(1);
 654                 }
 655                 if (!Nflag && write(ofile, buf, (int) size) == -1) {
 656                         fprintf(stderr,
 657                                 "write error extracting inode %d, name %s\n",
 658                                 curfile.ino, curfile.name);
 659                         fprintf(stderr, "write: %s\n", strerror(errno));
 660                         done(1);
 661                 }
 662         }
 663         close(dp);
 664         close(ofile);
 665         return (GOOD);
 666 }
 667
 668 /*
 669  * Determine the type of an inode
 670  */
 671 int
 672 inodetype(ufs1_ino_t ino)
 673 {
 674         struct inotab *itp;
 675
 676         itp = inotablookup(ino);
 677         if (itp == NULL)
 678                 return (LEAF);
 679         return (NODE);
 680 }
 681
 682 /*
 683  * Allocate and initialize a directory inode entry.
 684  * If requested, save its pertinent mode, owner, and time info.
 685  */
 686 static struct inotab *
 687 allocinotab(ufs1_ino_t ino, struct ufs1_dinode *dip, long seekpt)
 688 {
 689         struct inotab   *itp;
 690         struct modeinfo node;
 691
 692         itp = calloc(1, sizeof(struct inotab));
 693         if (itp == NULL)
 694                 panic("no memory directory table\n");
 695         itp->t_next = inotab[INOHASH(ino)];
 696         inotab[INOHASH(ino)] = itp;
 697         itp->t_ino = ino;
 698         itp->t_seekpt = seekpt;
 699         if (mf == NULL)
 700                 return (itp);
 701         node.ino = ino;
 702         node.timep[0].tv_sec = dip->di_atime;
 703         node.timep[0].tv_usec = dip->di_atimensec / 1000;
 704         node.timep[1].tv_sec = dip->di_mtime;
 705         node.timep[1].tv_usec = dip->di_mtimensec / 1000;
 706         node.mode = dip->di_mode;
 707         node.flags = dip->di_flags;
 708         node.uid = dip->di_uid;
 709         node.gid = dip->di_gid;
 710         fwrite((char *)&node, 1, sizeof(struct modeinfo), mf);
 711         return (itp);
 712 }
 713
 714 /*
 715  * Look up an inode in the table of directories
 716  */
 717 static struct inotab *
 718 inotablookup(ufs1_ino_t ino)
 719 {
 720         struct inotab *itp;
 721
 722         for (itp = inotab[INOHASH(ino)]; itp != NULL; itp = itp->t_next)
 723                 if (itp->t_ino == ino)
 724                         return (itp);
 725         return (NULL);
 726 }
 727
 728 /*
 729  * Clean up and exit
 730  */
 731 void
 732 done(int exitcode)
 733 {
 734
 735         closemt();
 736         if (modefile[0] != '#')
 737                 unlink(modefile);
 738         if (dirfile[0] != '#')
 739                 unlink(dirfile);
 740         exit(exitcode);
 741 }