restore/dirs.c

   1 /*
   2  *      Ported to Linux's Second Extended File System as part of the
   3  *      dump and restore backup suit
   4  *      Remy Card <card@Linux.EU.Org>, 1994-1997
   5  *      Stelian Pop <pop@noos.fr>, 1999-2000
   6  *      Stelian Pop <pop@noos.fr> - Alcôve <www.alcove.fr>, 2000
   7  */
   8
   9 /*
  10  * Copyright (c) 1983, 1993
  11  *      The Regents of the University of California.  All rights reserved.
  12  * (c) UNIX System Laboratories, Inc.
  13  * All or some portions of this file are derived from material licensed
  14  * to the University of California by American Telephone and Telegraph
  15  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
  16  * the permission of UNIX System Laboratories, Inc.
  17  *
  18  * Redistribution and use in source and binary forms, with or without
  19  * modification, are permitted provided that the following conditions
  20  * are met:
  21  * 1. Redistributions of source code must retain the above copyright
  22  *    notice, this list of conditions and the following disclaimer.
  23  * 2. Redistributions in binary form must reproduce the above copyright
  24  *    notice, this list of conditions and the following disclaimer in the
  25  *    documentation and/or other materials provided with the distribution.
  26  * 3. All advertising materials mentioning features or use of this software
  27  *    must display the following acknowledgement:
  28  *      This product includes software developed by the University of
  29  *      California, Berkeley and its contributors.
  30  * 4. Neither the name of the University nor the names of its contributors
  31  *    may be used to endorse or promote products derived from this software
  32  *    without specific prior written permission.
  33  *
  34  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  35  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  36  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  37  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  38  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  39  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  40  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  41  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  42  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  43  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  44  * SUCH DAMAGE.
  45  */
  46
  47 #ifndef lint
  48 static const char rcsid[] =
  49         "$Id: dirs.c,v 1.11 2000/12/04 15:43:17 stelian Exp $";
  50 #endif /* not lint */
  51
  52 #include <sys/param.h>
  53 #include <sys/file.h>
  54 #include <sys/stat.h>
  55
  56 #ifdef  __linux__
  57 #include <linux/ext2_fs.h>
  58 #include <bsdcompat.h>
  59 #else   /* __linux__ */
  60 #include <ufs/ufs/dinode.h>
  61 #include <ufs/ufs/dir.h>
  62 #endif  /* __linux__ */
  63 #include <protocols/dumprestore.h>
  64
  65 #include <compaterr.h>
  66 #include <errno.h>
  67 #include <stdio.h>
  68 #include <stdlib.h>
  69 #include <string.h>
  70 #include <unistd.h>
  71
  72 #ifdef  __linux__
  73 #include <endian.h>
  74 #else
  75 #include <machine/endian.h>
  76 #endif
  77
  78 #include "pathnames.h"
  79 #include "restore.h"
  80 #include "extern.h"
  81
  82 /*
  83  * Symbol table of directories read from tape.
  84  */
  85 #define HASHSIZE        1000
  86 #define INOHASH(val) (val % HASHSIZE)
  87 struct inotab {
  88         struct  inotab *t_next;
  89         ino_t   t_ino;
  90         int32_t t_seekpt;
  91         int32_t t_size;
  92 };
  93 static struct inotab *inotab[HASHSIZE];
  94
  95 /*
  96  * Information retained about directories.
  97  */
  98 struct modeinfo {
  99         ino_t ino;
 100         struct timeval timep[2];
 101         mode_t mode;
 102         uid_t uid;
 103         gid_t gid;
 104         unsigned int flags;
 105 };
 106
 107 /*
 108  * Definitions for library routines operating on directories.
 109  */
 110 #undef DIRBLKSIZ
 111 #define DIRBLKSIZ 1024
 112 struct rstdirdesc {
 113         int     dd_fd;
 114         int32_t dd_loc;
 115         int32_t dd_size;
 116         char    dd_buf[DIRBLKSIZ];
 117 };
 118
 119 /*
 120  * Global variables for this file.
 121  */
 122 static long     seekpt;
 123 static FILE     *df, *mf;
 124 static RST_DIR  *dirp;
 125 static char     dirfile[MAXPATHLEN] = "#";      /* No file */
 126 static char     modefile[MAXPATHLEN] = "#";     /* No file */
 127 static char     dot[2] = ".";                   /* So it can be modified */
 128
 129 /*
 130  * Format of old style directories.
 131  */
 132 #define ODIRSIZ 14
 133 struct odirect {
 134         u_short d_ino;
 135         char    d_name[ODIRSIZ];
 136 };
 137
 138 #ifdef  __linux__
 139 static struct inotab    *allocinotab __P((ino_t, struct new_bsd_inode *, long));
 140 #else
 141 static struct inotab    *allocinotab __P((ino_t, struct dinode *, long));
 142 #endif
 143 static void              dcvt __P((struct odirect *, struct direct *));
 144 static void              flushent __P((void));
 145 static struct inotab    *inotablookup __P((ino_t));
 146 static RST_DIR          *opendirfile __P((const char *));
 147 static void              putdir __P((char *, size_t));
 148 static void              putent __P((struct direct *));
 149 static void              rst_seekdir __P((RST_DIR *, long, long));
 150 static long              rst_telldir __P((RST_DIR *));
 151 static struct direct    *searchdir __P((ino_t, char *));
 152
 153 /*
 154  *      Extract directory contents, building up a directory structure
 155  *      on disk for extraction by name.
 156  *      If genmode is requested, save mode, owner, and times for all
 157  *      directories on the tape.
 158  */
 159 void
 160 extractdirs(int genmode)
 161 {
 162         register int i;
 163 #ifdef  __linux__
 164         register struct new_bsd_inode *ip;
 165 #else
 166         register struct dinode *ip;
 167 #endif
 168         struct inotab *itp;
 169         struct direct nulldir;
 170         int fd;
 171
 172         Vprintf(stdout, "Extract directories from tape\n");
 173         (void) snprintf(dirfile, sizeof(dirfile), "%s/rstdir%ld", tmpdir,
 174                 (long)dumpdate);
 175         if (command != 'r' && command != 'R') {
 176                 (void) strncat(dirfile, "-XXXXXX",
 177                         sizeof(dirfile) - strlen(dirfile));
 178                 fd = mkstemp(dirfile);
 179         } else
 180                 fd = open(dirfile, O_RDWR|O_CREAT|O_EXCL, 0666);
 181         if (fd == -1 || (df = fdopen(fd, "w")) == NULL) {
 182                 if (fd != -1)
 183                         close(fd);
 184                 err(1, "cannot create directory temporary %s", dirfile);
 185         }
 186         if (genmode != 0) {
 187                 (void) snprintf(modefile, sizeof(modefile), "%s/rstmode%ld", tmpdir, (long)dumpdate);
 188                 if (command != 'r' && command != 'R') {
 189                         (void) strncat(modefile, "-XXXXXX",
 190                                 sizeof(modefile) - strlen(modefile));
 191                         fd = mkstemp(modefile);
 192                 } else
 193                         fd = open(modefile, O_RDWR|O_CREAT|O_EXCL, 0666);
 194                 if (fd == -1 || (mf = fdopen(fd, "w")) == NULL) {
 195                         if (fd != -1)
 196                                 close(fd);
 197                         err(1, "cannot create modefile %s", modefile);
 198                 }
 199         }
 200         nulldir.d_ino = 0;
 201         nulldir.d_type = DT_DIR;
 202         nulldir.d_namlen = 1;
 203         nulldir.d_name[0] = '/';
 204         nulldir.d_name[1] = '\0';
 205         nulldir.d_reclen = DIRSIZ(0, &nulldir);
 206         for (;;) {
 207                 curfile.name = "<directory file - name unknown>";
 208                 curfile.action = USING;
 209                 ip = curfile.dip;
 210                 if (ip == NULL || (ip->di_mode & IFMT) != IFDIR) {
 211                         (void) fclose(df);
 212                         dirp = opendirfile(dirfile);
 213                         if (dirp == NULL)
 214                                 warn("opendirfile");
 215                         if (mf != NULL)
 216                                 (void) fclose(mf);
 217                         i = dirlookup(dot);
 218                         if (i == 0)
 219                                 panic("Root directory is not on tape\n");
 220                         return;
 221                 }
 222                 itp = allocinotab(curfile.ino, ip, seekpt);
 223                 getfile(putdir, xtrnull);
 224                 putent(&nulldir);
 225                 flushent();
 226                 itp->t_size = seekpt - itp->t_seekpt;
 227         }
 228 }
 229
 230 /*
 231  * skip over all the directories on the tape
 232  */
 233 void
 234 skipdirs(void)
 235 {
 236
 237         while (curfile.dip && (curfile.dip->di_mode & IFMT) == IFDIR) {
 238                 skipfile();
 239         }
 240 }
 241
 242 /*
 243  *      Recursively find names and inumbers of all files in subtree
 244  *      pname and pass them off to be processed.
 245  */
 246 void
 247 treescan(char *pname, ino_t ino, long (*todo) __P((char *, ino_t, int)))
 248 {
 249         register struct inotab *itp;
 250         register struct direct *dp;
 251         int namelen;
 252         long bpt;
 253         char locname[MAXPATHLEN + 1];
 254
 255         itp = inotablookup(ino);
 256         if (itp == NULL) {
 257                 /*
 258                  * Pname is name of a simple file or an unchanged directory.
 259                  */
 260                 (void) (*todo)(pname, ino, LEAF);
 261                 return;
 262         }
 263         /*
 264          * Pname is a dumped directory name.
 265          */
 266         if ((*todo)(pname, ino, NODE) == FAIL)
 267                 return;
 268         /*
 269          * begin search through the directory
 270          * skipping over "." and ".."
 271          */
 272         namelen = snprintf(locname, sizeof(locname), "%s/", pname);
 273         if (namelen >= sizeof(locname))
 274                 namelen = sizeof(locname) - 1;
 275         rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 276         dp = rst_readdir(dirp); /* "." */
 277         if (dp != NULL && strcmp(dp->d_name, ".") == 0)
 278                 dp = rst_readdir(dirp); /* ".." */
 279         else
 280                 fprintf(stderr, "Warning: `.' missing from directory %s\n",
 281                         pname);
 282         if (dp != NULL && strcmp(dp->d_name, "..") == 0)
 283                 dp = rst_readdir(dirp); /* first real entry */
 284         else
 285                 fprintf(stderr, "Warning: `..' missing from directory %s\n",
 286                         pname);
 287         bpt = rst_telldir(dirp);
 288         /*
 289          * a zero inode signals end of directory
 290          */
 291         while (dp != NULL) {
 292                 locname[namelen] = '\0';
 293                 if (namelen + dp->d_namlen >= sizeof(locname)) {
 294                         fprintf(stderr, "%s%s: name exceeds %ld char\n",
 295                                 locname, dp->d_name, (long)sizeof(locname) - 1);
 296                 } else {
 297                         (void) strncat(locname, dp->d_name, (int)dp->d_namlen);
 298                         treescan(locname, dp->d_ino, todo);
 299                         rst_seekdir(dirp, bpt, itp->t_seekpt);
 300                 }
 301                 dp = rst_readdir(dirp);
 302                 bpt = rst_telldir(dirp);
 303         }
 304 }
 305
 306 /*
 307  * Lookup a pathname which is always assumed to start from the ROOTINO.
 308  */
 309 struct direct *
 310 pathsearch(const char *pathname)
 311 {
 312         ino_t ino;
 313         struct direct *dp;
 314         char *path, *name, buffer[MAXPATHLEN];
 315
 316         strcpy(buffer, pathname);
 317         path = buffer;
 318         ino = ROOTINO;
 319         while (*path == '/')
 320                 path++;
 321         dp = NULL;
 322         while ((name = strsep(&path, "/")) != NULL && *name /* != NULL */) {
 323                 if ((dp = searchdir(ino, name)) == NULL)
 324                         return (NULL);
 325                 ino = dp->d_ino;
 326         }
 327         return (dp);
 328 }
 329
 330 /*
 331  * Lookup the requested name in directory inum.
 332  * Return its inode number if found, zero if it does not exist.
 333  */
 334 static struct direct *
 335 searchdir(ino_t inum, char *name)
 336 {
 337         register struct direct *dp;
 338         register struct inotab *itp;
 339         int len;
 340
 341         itp = inotablookup(inum);
 342         if (itp == NULL)
 343                 return (NULL);
 344         rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 345         len = strlen(name);
 346         do {
 347                 dp = rst_readdir(dirp);
 348                 if (dp == NULL)
 349                         return (NULL);
 350         } while (dp->d_namlen != len || strncmp(dp->d_name, name, len) != 0);
 351         return (dp);
 352 }
 353
 354 /*
 355  * Put the directory entries in the directory file
 356  */
 357 static void
 358 putdir(char *buf, size_t size)
 359 {
 360         struct direct cvtbuf;
 361         register struct odirect *odp;
 362         struct odirect *eodp;
 363         register struct direct *dp;
 364         long loc, i;
 365
 366         if (cvtflag) {
 367                 eodp = (struct odirect *)&buf[size];
 368                 for (odp = (struct odirect *)buf; odp < eodp; odp++)
 369                         if (odp->d_ino != 0) {
 370                                 dcvt(odp, &cvtbuf);
 371                                 putent(&cvtbuf);
 372                         }
 373         } else {
 374                 for (loc = 0; loc < size; ) {
 375                         dp = (struct direct *)(buf + loc);
 376 #ifdef  DIRDEBUG
 377                         printf ("reclen = %d, namlen = %d, type = %d\n",
 378                                 dp->d_reclen, dp->d_namlen, dp->d_type);
 379 #endif
 380                         if (Bcvt)
 381                                 swabst((u_char *)"is", (u_char *) dp);
 382                         if (oldinofmt && dp->d_ino != 0) {
 383 #                               if BYTE_ORDER == BIG_ENDIAN
 384                                         if (Bcvt)
 385                                                 dp->d_namlen = dp->d_type;
 386 #                               else
 387                                         if (!Bcvt)
 388                                                 dp->d_namlen = dp->d_type;
 389 #                               endif
 390                                 dp->d_type = DT_UNKNOWN;
 391                         }
 392 #ifdef  DIRDEBUG
 393                         printf ("reclen = %d, namlen = %d, type = %d\n",
 394                                 dp->d_reclen, dp->d_namlen, dp->d_type);
 395 #endif
 396                         i = DIRBLKSIZ - (loc & (DIRBLKSIZ - 1));
 397                         if ((dp->d_reclen & 0x3) != 0 ||
 398                             dp->d_reclen > i ||
 399                             dp->d_reclen < DIRSIZ(0, dp) ||
 400                             dp->d_namlen > MAXNAMLEN) {
 401                                 Vprintf(stdout, "Mangled directory: ");
 402                                 if ((dp->d_reclen & 0x3) != 0)
 403                                         Vprintf(stdout,
 404                                            "reclen not multiple of 4 ");
 405                                 if (dp->d_reclen < DIRSIZ(0, dp))
 406                                         Vprintf(stdout,
 407                                            "reclen less than DIRSIZ (%d < %d) ",
 408                                            dp->d_reclen, DIRSIZ(0, dp));
 409                                 if (dp->d_namlen > MAXNAMLEN)
 410                                         Vprintf(stdout,
 411                                            "reclen name too big (%d > %d) ",
 412                                            dp->d_namlen, MAXNAMLEN);
 413                                 Vprintf(stdout, "\n");
 414                                 loc += i;
 415                                 continue;
 416                         }
 417                         loc += dp->d_reclen;
 418                         if (dp->d_ino != 0) {
 419                                 putent(dp);
 420                         }
 421                 }
 422         }
 423 }
 424
 425 /*
 426  * These variables are "local" to the following two functions.
 427  */
 428 char dirbuf[DIRBLKSIZ];
 429 long dirloc = 0;
 430 long prev = 0;
 431
 432 /*
 433  * add a new directory entry to a file.
 434  */
 435 static void
 436 putent(struct direct *dp)
 437 {
 438         dp->d_reclen = DIRSIZ(0, dp);
 439         if (dirloc + dp->d_reclen > DIRBLKSIZ) {
 440                 ((struct direct *)(dirbuf + prev))->d_reclen =
 441                     DIRBLKSIZ - prev;
 442                 (void) fwrite(dirbuf, 1, DIRBLKSIZ, df);
 443                 dirloc = 0;
 444         }
 445         memmove(dirbuf + dirloc, dp, (size_t)dp->d_reclen);
 446         prev = dirloc;
 447         dirloc += dp->d_reclen;
 448 }
 449
 450 /*
 451  * flush out a directory that is finished.
 452  */
 453 static void
 454 flushent(void)
 455 {
 456         ((struct direct *)(dirbuf + prev))->d_reclen = DIRBLKSIZ - prev;
 457         (void) fwrite(dirbuf, (int)dirloc, 1, df);
 458         seekpt = ftell(df);
 459         dirloc = 0;
 460 }
 461
 462 static void
 463 dcvt(struct odirect *odp, struct direct *ndp)
 464 {
 465
 466         memset(ndp, 0, (size_t)(sizeof *ndp));
 467         ndp->d_ino =  odp->d_ino;
 468         ndp->d_type = DT_UNKNOWN;
 469         (void) strncpy(ndp->d_name, odp->d_name, ODIRSIZ);
 470         ndp->d_namlen = strlen(ndp->d_name);
 471         ndp->d_reclen = DIRSIZ(0, ndp);
 472 }
 473
 474 /*
 475  * Seek to an entry in a directory.
 476  * Only values returned by rst_telldir should be passed to rst_seekdir.
 477  * This routine handles many directories in a single file.
 478  * It takes the base of the directory in the file, plus
 479  * the desired seek offset into it.
 480  */
 481 static void
 482 rst_seekdir(RST_DIR *dirp, long loc, long base)
 483 {
 484
 485         if (loc == rst_telldir(dirp))
 486                 return;
 487         loc -= base;
 488         if (loc < 0)
 489                 fprintf(stderr, "bad seek pointer to rst_seekdir %ld\n", loc);
 490         (void) lseek(dirp->dd_fd, base + (loc & ~(DIRBLKSIZ - 1)), SEEK_SET);
 491         dirp->dd_loc = loc & (DIRBLKSIZ - 1);
 492         if (dirp->dd_loc != 0)
 493                 dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ);
 494 }
 495
 496 /*
 497  * get next entry in a directory.
 498  */
 499 struct direct *
 500 rst_readdir(RST_DIR *dirp)
 501 {
 502         register struct direct *dp;
 503
 504         for (;;) {
 505                 if (dirp->dd_loc == 0) {
 506                         dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf,
 507                             DIRBLKSIZ);
 508                         if (dirp->dd_size <= 0) {
 509                                 Dprintf(stderr, "error reading directory\n");
 510                                 return (NULL);
 511                         }
 512                 }
 513                 if (dirp->dd_loc >= dirp->dd_size) {
 514                         dirp->dd_loc = 0;
 515                         continue;
 516                 }
 517                 dp = (struct direct *)(dirp->dd_buf + dirp->dd_loc);
 518                 if (dp->d_reclen == 0 ||
 519                     dp->d_reclen > DIRBLKSIZ + 1 - dirp->dd_loc) {
 520                         Dprintf(stderr, "corrupted directory: bad reclen %d\n",
 521                                 dp->d_reclen);
 522                         return (NULL);
 523                 }
 524                 dirp->dd_loc += dp->d_reclen;
 525                 if (dp->d_ino == 0 && strcmp(dp->d_name, "/") == 0)
 526                         return (NULL);
 527                 if (dp->d_ino >= maxino) {
 528                         Dprintf(stderr, "corrupted directory: bad inum %d\n",
 529                                 dp->d_ino);
 530                         continue;
 531                 }
 532                 return (dp);
 533         }
 534 }
 535
 536 /*
 537  * Simulate the opening of a directory
 538  */
 539 RST_DIR *
 540 rst_opendir(const char *name)
 541 {
 542         struct inotab *itp;
 543         RST_DIR *dirp;
 544         ino_t ino;
 545
 546         if ((ino = dirlookup(name)) > 0 &&
 547             (itp = inotablookup(ino)) != NULL) {
 548                 dirp = opendirfile(dirfile);
 549                 rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 550                 return (dirp);
 551         }
 552         return (NULL);
 553 }
 554
 555 /*
 556  * In our case, there is nothing to do when closing a directory.
 557  */
 558 void
 559 rst_closedir(RST_DIR *dirp)
 560 {
 561
 562         (void)close(dirp->dd_fd);
 563         free(dirp);
 564         return;
 565 }
 566
 567 /*
 568  * Simulate finding the current offset in the directory.
 569  */
 570 static long
 571 rst_telldir(RST_DIR *dirp)
 572 {
 573         return ((long)lseek(dirp->dd_fd,
 574             (off_t)0, SEEK_CUR) - dirp->dd_size + dirp->dd_loc);
 575 }
 576
 577 /*
 578  * Open a directory file.
 579  */
 580 static RST_DIR *
 581 opendirfile(const char *name)
 582 {
 583         register RST_DIR *dirp;
 584         register int fd;
 585
 586         if ((fd = open(name, O_RDONLY)) == -1)
 587                 return (NULL);
 588         if ((dirp = malloc(sizeof(RST_DIR))) == NULL) {
 589                 (void)close(fd);
 590                 return (NULL);
 591         }
 592         dirp->dd_fd = fd;
 593         dirp->dd_loc = 0;
 594         return (dirp);
 595 }
 596
 597 /*
 598  * Set the mode, owner, and times for all new or changed directories
 599  */
 600 void
 601 setdirmodes(int flags)
 602 {
 603         FILE *mf;
 604         struct modeinfo node;
 605         struct entry *ep;
 606         char *cp;
 607
 608         Vprintf(stdout, "Set directory mode, owner, and times.\n");
 609         if (command == 'r' || command == 'R')
 610                 (void) snprintf(modefile, sizeof(modefile), "%s/rstmode%lu", tmpdir, (long)dumpdate);
 611         if (modefile[0] == '#') {
 612                 panic("modefile not defined\n");
 613                 fprintf(stderr, "directory mode, owner, and times not set\n");
 614                 return;
 615         }
 616         mf = fopen(modefile, "r");
 617         if (mf == NULL) {
 618                 warn("fopen");
 619                 fprintf(stderr, "cannot open mode file %s\n", modefile);
 620                 fprintf(stderr, "directory mode, owner, and times not set\n");
 621                 return;
 622         }
 623         clearerr(mf);
 624         for (;;) {
 625                 (void) fread((char *)&node, 1, sizeof(struct modeinfo), mf);
 626                 if (feof(mf))
 627                         break;
 628                 ep = lookupino(node.ino);
 629                 if (command == 'i' || command == 'x') {
 630                         if (ep == NULL)
 631                                 continue;
 632                         if ((flags & FORCE) == 0 && ep->e_flags & EXISTED) {
 633                                 ep->e_flags &= ~NEW;
 634                                 continue;
 635                         }
 636                         if (node.ino == ROOTINO &&
 637                             reply("set owner/mode for '.'") == FAIL)
 638                                 continue;
 639                 }
 640                 if (ep == NULL) {
 641                         panic("cannot find directory inode %d\n", node.ino);
 642                 } else {
 643                         cp = myname(ep);
 644                         (void) chown(cp, node.uid, node.gid);
 645                         (void) chmod(cp, node.mode);
 646                         if (node.flags)
 647 #ifdef  __linux__
 648                                 (void) fsetflags(cp, node.flags);
 649 #else
 650                                 (void) chflags(cp, node.flags);
 651 #endif
 652                         utimes(cp, node.timep);
 653                         ep->e_flags &= ~NEW;
 654                 }
 655         }
 656         if (ferror(mf))
 657                 panic("error setting directory modes\n");
 658         (void) fclose(mf);
 659 }
 660
 661 /*
 662  * Generate a literal copy of a directory.
 663  */
 664 int
 665 genliteraldir(char *name, ino_t ino)
 666 {
 667         register struct inotab *itp;
 668         int ofile, dp, i, size;
 669         char buf[BUFSIZ];
 670
 671         itp = inotablookup(ino);
 672         if (itp == NULL)
 673                 panic("Cannot find directory inode %d named %s\n", ino, name);
 674         if ((ofile = open(name, O_WRONLY | O_CREAT | O_TRUNC, 0666)) < 0) {
 675                 warn("%s: cannot create file\n", name);
 676                 return (FAIL);
 677         }
 678         rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 679         dp = dup(dirp->dd_fd);
 680         for (i = itp->t_size; i > 0; i -= BUFSIZ) {
 681                 size = i < BUFSIZ ? i : BUFSIZ;
 682                 if (read(dp, buf, (int) size) == -1) {
 683                         warnx("write error extracting inode %lu, name %s\n",
 684                                 (unsigned long)curfile.ino, curfile.name);
 685                         err(1, "read");
 686                 }
 687                 if (!Nflag && write(ofile, buf, (int) size) == -1) {
 688                         warnx("write error extracting inode %lu, name %s\n",
 689                                 (unsigned long)curfile.ino, curfile.name);
 690                         err(1, "write");
 691                 }
 692         }
 693         (void) close(dp);
 694         (void) close(ofile);
 695         return (GOOD);
 696 }
 697
 698 /*
 699  * Determine the type of an inode
 700  */
 701 int
 702 inodetype(ino_t ino)
 703 {
 704         struct inotab *itp;
 705
 706         itp = inotablookup(ino);
 707         if (itp == NULL)
 708                 return (LEAF);
 709         return (NODE);
 710 }
 711
 712 /*
 713  * Allocate and initialize a directory inode entry.
 714  * If requested, save its pertinent mode, owner, and time info.
 715  */
 716 static struct inotab *
 717 #ifdef  __linux__
 718 allocinotab(ino_t ino, struct new_bsd_inode *dip, long seekpt)
 719 #else
 720 allocinotab(ino_t ino, struct dinode *dip, long seekpt)
 721 #endif
 722 {
 723         register struct inotab  *itp;
 724         struct modeinfo node;
 725
 726         itp = calloc(1, sizeof(struct inotab));
 727         if (itp == NULL)
 728                 panic("no memory directory table\n");
 729         itp->t_next = inotab[INOHASH(ino)];
 730         inotab[INOHASH(ino)] = itp;
 731         itp->t_ino = ino;
 732         itp->t_seekpt = seekpt;
 733         if (mf == NULL)
 734                 return (itp);
 735         node.ino = ino;
 736 #ifdef  __linux__
 737         node.timep[0].tv_sec = dip->di_atime.tv_sec;
 738         node.timep[0].tv_usec = dip->di_atime.tv_usec;
 739         node.timep[1].tv_sec = dip->di_mtime.tv_sec;
 740         node.timep[1].tv_usec = dip->di_mtime.tv_usec;
 741 #else   /* __linux__ */
 742         node.timep[0].tv_sec = dip->di_atime;
 743         node.timep[0].tv_usec = dip->di_atimensec / 1000;
 744         node.timep[1].tv_sec = dip->di_mtime;
 745         node.timep[1].tv_usec = dip->di_mtimensec / 1000;
 746 #endif  /* __linux__ */
 747         node.mode = dip->di_mode;
 748         node.flags = dip->di_flags;
 749         node.uid = dip->di_uid;
 750         node.gid = dip->di_gid;
 751         (void) fwrite((char *)&node, 1, sizeof(struct modeinfo), mf);
 752         return (itp);
 753 }
 754
 755 /*
 756  * Look up an inode in the table of directories
 757  */
 758 static struct inotab *
 759 inotablookup(ino_t ino)
 760 {
 761         register struct inotab *itp;
 762
 763         for (itp = inotab[INOHASH(ino)]; itp != NULL; itp = itp->t_next)
 764                 if (itp->t_ino == ino)
 765                         return (itp);
 766         return (NULL);
 767 }
 768
 769 /*
 770  * Clean up and exit
 771  */
 772 void
 773 cleanup(void)
 774 {
 775         closemt();
 776         if (modefile[0] != '#')
 777                 (void) unlink(modefile);
 778         if (dirfile[0] != '#')
 779                 (void) unlink(dirfile);
 780 }