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@cybercable.fr>, 1999
   6  *
   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 #if 0
  49 static char sccsid[] = "@(#)dirs.c      8.7 (Berkeley) 5/1/95";
  50 #endif
  51 static const char rcsid[] =
  52         "$Id: dirs.c,v 1.3 1999/10/11 12:59:19 stelian Exp $";
  53 #endif /* not lint */
  54
  55 #include <sys/param.h>
  56 #include <sys/file.h>
  57 #include <sys/stat.h>
  58
  59 #ifdef  __linux__
  60 #include <linux/ext2_fs.h>
  61 #include <bsdcompat.h>
  62 #else   /* __linux__ */
  63 #include <ufs/ufs/dinode.h>
  64 #include <ufs/ufs/dir.h>
  65 #endif  /* __linux__ */
  66 #include <protocols/dumprestore.h>
  67
  68 #include <compaterr.h>
  69 #include <errno.h>
  70 #include <stdio.h>
  71 #include <stdlib.h>
  72 #include <string.h>
  73 #include <unistd.h>
  74
  75 #ifdef  __linux__
  76 #include <endian.h>
  77 #else
  78 #include <machine/endian.h>
  79 #endif
  80
  81 #include "pathnames.h"
  82 #include "restore.h"
  83 #include "extern.h"
  84
  85 /*
  86  * Symbol table of directories read from tape.
  87  */
  88 #define HASHSIZE        1000
  89 #define INOHASH(val) (val % HASHSIZE)
  90 struct inotab {
  91         struct  inotab *t_next;
  92         ino_t   t_ino;
  93         int32_t t_seekpt;
  94         int32_t t_size;
  95 };
  96 static struct inotab *inotab[HASHSIZE];
  97
  98 /*
  99  * Information retained about directories.
 100  */
 101 struct modeinfo {
 102         ino_t ino;
 103         struct timeval timep[2];
 104         mode_t mode;
 105         uid_t uid;
 106         gid_t gid;
 107         unsigned int flags;
 108 };
 109
 110 /*
 111  * Definitions for library routines operating on directories.
 112  */
 113 #undef DIRBLKSIZ
 114 #define DIRBLKSIZ 1024
 115 struct rstdirdesc {
 116         int     dd_fd;
 117         int32_t dd_loc;
 118         int32_t dd_size;
 119         char    dd_buf[DIRBLKSIZ];
 120 };
 121
 122 /*
 123  * Global variables for this file.
 124  */
 125 static long     seekpt;
 126 static FILE     *df, *mf;
 127 static RST_DIR  *dirp;
 128 static char     dirfile[MAXPATHLEN] = "#";      /* No file */
 129 static char     modefile[MAXPATHLEN] = "#";     /* No file */
 130 static char     dot[2] = ".";                   /* So it can be modified */
 131
 132 /*
 133  * Format of old style directories.
 134  */
 135 #define ODIRSIZ 14
 136 struct odirect {
 137         u_short d_ino;
 138         char    d_name[ODIRSIZ];
 139 };
 140
 141 #ifdef  __linux__
 142 static struct inotab    *allocinotab __P((ino_t, struct new_bsd_inode *, long));
 143 #else
 144 static struct inotab    *allocinotab __P((ino_t, struct dinode *, long));
 145 #endif
 146 static void              dcvt __P((struct odirect *, struct direct *));
 147 static void              flushent __P((void));
 148 static struct inotab    *inotablookup __P((ino_t));
 149 static RST_DIR          *opendirfile __P((const char *));
 150 static void              putdir __P((char *, size_t));
 151 static void              putent __P((struct direct *));
 152 static void              rst_seekdir __P((RST_DIR *, long, long));
 153 static long              rst_telldir __P((RST_DIR *));
 154 static struct direct    *searchdir __P((ino_t, char *));
 155
 156 /*
 157  *      Extract directory contents, building up a directory structure
 158  *      on disk for extraction by name.
 159  *      If genmode is requested, save mode, owner, and times for all
 160  *      directories on the tape.
 161  */
 162 void
 163 extractdirs(int genmode)
 164 {
 165         register int i;
 166 #ifdef  __linux__
 167         register struct new_bsd_inode *ip;
 168 #else
 169         register struct dinode *ip;
 170 #endif
 171         struct inotab *itp;
 172         struct direct nulldir;
 173         int fd;
 174
 175         Vprintf(stdout, "Extract directories from tape\n");
 176         (void) snprintf(dirfile, sizeof(dirfile), "%s/rstdir%ld", tmpdir,
 177                 (long)dumpdate);
 178         if (command != 'r' && command != 'R') {
 179                 (void) strncat(dirfile, "-XXXXXX",
 180                         sizeof(dirfile) - strlen(dirfile));
 181                 fd = mkstemp(dirfile);
 182         } else
 183                 fd = open(dirfile, O_RDWR|O_CREAT|O_EXCL, 0666);
 184         if (fd == -1 || (df = fdopen(fd, "w")) == NULL) {
 185                 if (fd != -1)
 186                         close(fd);
 187                 err(1, "cannot create directory temporary %s", dirfile);
 188         }
 189         if (genmode != 0) {
 190                 (void) snprintf(modefile, sizeof(modefile), "%s/rstmode%ld", tmpdir, (long)dumpdate);
 191                 if (command != 'r' && command != 'R') {
 192                         (void) strncat(modefile, "-XXXXXX",
 193                                 sizeof(modefile) - strlen(modefile));
 194                         fd = mkstemp(modefile);
 195                 } else
 196                         fd = open(modefile, O_RDWR|O_CREAT|O_EXCL, 0666);
 197                 if (fd == -1 || (mf = fdopen(fd, "w")) == NULL) {
 198                         if (fd != -1)
 199                                 close(fd);
 200                         err(1, "cannot create modefile %s", modefile);
 201                 }
 202         }
 203         nulldir.d_ino = 0;
 204         nulldir.d_type = DT_DIR;
 205         nulldir.d_namlen = 1;
 206         nulldir.d_name[0] = '/';
 207         nulldir.d_name[1] = '\0';
 208         nulldir.d_reclen = DIRSIZ(0, &nulldir);
 209         for (;;) {
 210                 curfile.name = "<directory file - name unknown>";
 211                 curfile.action = USING;
 212                 ip = curfile.dip;
 213                 if (ip == NULL || (ip->di_mode & IFMT) != IFDIR) {
 214                         (void) fclose(df);
 215                         dirp = opendirfile(dirfile);
 216                         if (dirp == NULL)
 217                                 warn("opendirfile");
 218                         if (mf != NULL)
 219                                 (void) fclose(mf);
 220                         i = dirlookup(dot);
 221                         if (i == 0)
 222                                 panic("Root directory is not on tape\n");
 223                         return;
 224                 }
 225                 itp = allocinotab(curfile.ino, ip, seekpt);
 226                 getfile(putdir, xtrnull);
 227                 putent(&nulldir);
 228                 flushent();
 229                 itp->t_size = seekpt - itp->t_seekpt;
 230         }
 231 }
 232
 233 /*
 234  * skip over all the directories on the tape
 235  */
 236 void
 237 skipdirs(void)
 238 {
 239
 240         while (curfile.dip && (curfile.dip->di_mode & IFMT) == IFDIR) {
 241                 skipfile();
 242         }
 243 }
 244
 245 /*
 246  *      Recursively find names and inumbers of all files in subtree
 247  *      pname and pass them off to be processed.
 248  */
 249 void
 250 treescan(char *pname, ino_t ino, long (*todo) __P((char *, ino_t, int)))
 251 {
 252         register struct inotab *itp;
 253         register struct direct *dp;
 254         int namelen;
 255         long bpt;
 256         char locname[MAXPATHLEN + 1];
 257
 258         itp = inotablookup(ino);
 259         if (itp == NULL) {
 260                 /*
 261                  * Pname is name of a simple file or an unchanged directory.
 262                  */
 263                 (void) (*todo)(pname, ino, LEAF);
 264                 return;
 265         }
 266         /*
 267          * Pname is a dumped directory name.
 268          */
 269         if ((*todo)(pname, ino, NODE) == FAIL)
 270                 return;
 271         /*
 272          * begin search through the directory
 273          * skipping over "." and ".."
 274          */
 275         namelen = snprintf(locname, sizeof(locname), "%s/", pname);
 276         if (namelen >= sizeof(locname))
 277                 namelen = sizeof(locname) - 1;
 278         rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 279         dp = rst_readdir(dirp); /* "." */
 280         if (dp != NULL && strcmp(dp->d_name, ".") == 0)
 281                 dp = rst_readdir(dirp); /* ".." */
 282         else
 283                 fprintf(stderr, "Warning: `.' missing from directory %s\n",
 284                         pname);
 285         if (dp != NULL && strcmp(dp->d_name, "..") == 0)
 286                 dp = rst_readdir(dirp); /* first real entry */
 287         else
 288                 fprintf(stderr, "Warning: `..' missing from directory %s\n",
 289                         pname);
 290         bpt = rst_telldir(dirp);
 291         /*
 292          * a zero inode signals end of directory
 293          */
 294         while (dp != NULL) {
 295                 locname[namelen] = '\0';
 296                 if (namelen + dp->d_namlen >= sizeof(locname)) {
 297                         fprintf(stderr, "%s%s: name exceeds %ld char\n",
 298                                 locname, dp->d_name, (long)sizeof(locname) - 1);
 299                 } else {
 300                         (void) strncat(locname, dp->d_name, (int)dp->d_namlen);
 301                         treescan(locname, dp->d_ino, todo);
 302                         rst_seekdir(dirp, bpt, itp->t_seekpt);
 303                 }
 304                 dp = rst_readdir(dirp);
 305                 bpt = rst_telldir(dirp);
 306         }
 307 }
 308
 309 /*
 310  * Lookup a pathname which is always assumed to start from the ROOTINO.
 311  */
 312 struct direct *
 313 pathsearch(const char *pathname)
 314 {
 315         ino_t ino;
 316         struct direct *dp;
 317         char *path, *name, buffer[MAXPATHLEN];
 318
 319         strcpy(buffer, pathname);
 320         path = buffer;
 321         ino = ROOTINO;
 322         while (*path == '/')
 323                 path++;
 324         dp = NULL;
 325         while ((name = strsep(&path, "/")) != NULL && *name /* != NULL */) {
 326                 if ((dp = searchdir(ino, name)) == NULL)
 327                         return (NULL);
 328                 ino = dp->d_ino;
 329         }
 330         return (dp);
 331 }
 332
 333 /*
 334  * Lookup the requested name in directory inum.
 335  * Return its inode number if found, zero if it does not exist.
 336  */
 337 static struct direct *
 338 searchdir(ino_t inum, char *name)
 339 {
 340         register struct direct *dp;
 341         register struct inotab *itp;
 342         int len;
 343
 344         itp = inotablookup(inum);
 345         if (itp == NULL)
 346                 return (NULL);
 347         rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 348         len = strlen(name);
 349         do {
 350                 dp = rst_readdir(dirp);
 351                 if (dp == NULL)
 352                         return (NULL);
 353         } while (dp->d_namlen != len || strncmp(dp->d_name, name, len) != 0);
 354         return (dp);
 355 }
 356
 357 /*
 358  * Put the directory entries in the directory file
 359  */
 360 static void
 361 putdir(char *buf, size_t size)
 362 {
 363         struct direct cvtbuf;
 364         register struct odirect *odp;
 365         struct odirect *eodp;
 366         register struct direct *dp;
 367         long loc, i;
 368
 369         if (cvtflag) {
 370                 eodp = (struct odirect *)&buf[size];
 371                 for (odp = (struct odirect *)buf; odp < eodp; odp++)
 372                         if (odp->d_ino != 0) {
 373                                 dcvt(odp, &cvtbuf);
 374                                 putent(&cvtbuf);
 375                         }
 376         } else {
 377                 for (loc = 0; loc < size; ) {
 378                         dp = (struct direct *)(buf + loc);
 379 #ifdef  DIRDEBUG
 380                         printf ("reclen = %d, namlen = %d, type = %d\n",
 381                                 dp->d_reclen, dp->d_namlen, dp->d_type);
 382 #endif
 383                         if (Bcvt)
 384                                 swabst((u_char *)"is", (u_char *) dp);
 385                         if (oldinofmt && dp->d_ino != 0) {
 386 #ifdef  __linux__
 387                                 if (Bcvt)
 388                                         swabst((u_char *)"s", (u_char *)&dp->d_namlen);
 389 #else
 390 #                               if BYTE_ORDER == BIG_ENDIAN
 391                                         if (Bcvt)
 392                                                 dp->d_namlen = dp->d_type;
 393 #                               else
 394                                         if (!Bcvt)
 395                                                 dp->d_namlen = dp->d_type;
 396 #                               endif
 397 #endif  /* __linux__ */
 398                                 dp->d_type = DT_UNKNOWN;
 399                         }
 400 #ifdef  __linux__
 401                         /*
 402                          * Horrible hack to read FreeBSD 2.0 dumps
 403                          */
 404                         if (!oldinofmt)
 405                                 swabst((u_char *)"6bs", (u_char *) dp);
 406 #endif  /* __linux__ */
 407 #ifdef  DIRDEBUG
 408                         printf ("reclen = %d, namlen = %d, type = %d\n",
 409                                 dp->d_reclen, dp->d_namlen, dp->d_type);
 410 #endif
 411                         i = DIRBLKSIZ - (loc & (DIRBLKSIZ - 1));
 412                         if ((dp->d_reclen & 0x3) != 0 ||
 413                             dp->d_reclen > i ||
 414                             dp->d_reclen < DIRSIZ(0, dp) ||
 415                             dp->d_namlen > NAME_MAX) {
 416                                 Vprintf(stdout, "Mangled directory: ");
 417                                 if ((dp->d_reclen & 0x3) != 0)
 418                                         Vprintf(stdout,
 419                                            "reclen not multiple of 4 ");
 420                                 if (dp->d_reclen < DIRSIZ(0, dp))
 421                                         Vprintf(stdout,
 422                                            "reclen less than DIRSIZ (%d < %d) ",
 423                                            dp->d_reclen, DIRSIZ(0, dp));
 424                                 if (dp->d_namlen > NAME_MAX)
 425                                         Vprintf(stdout,
 426                                            "reclen name too big (%d > %d) ",
 427                                            dp->d_namlen, NAME_MAX);
 428                                 Vprintf(stdout, "\n");
 429                                 loc += i;
 430                                 continue;
 431                         }
 432                         loc += dp->d_reclen;
 433                         if (dp->d_ino != 0) {
 434                                 putent(dp);
 435                         }
 436                 }
 437         }
 438 }
 439
 440 /*
 441  * These variables are "local" to the following two functions.
 442  */
 443 char dirbuf[DIRBLKSIZ];
 444 long dirloc = 0;
 445 long prev = 0;
 446
 447 /*
 448  * add a new directory entry to a file.
 449  */
 450 static void
 451 putent(struct direct *dp)
 452 {
 453         dp->d_reclen = DIRSIZ(0, dp);
 454         if (dirloc + dp->d_reclen > DIRBLKSIZ) {
 455                 ((struct direct *)(dirbuf + prev))->d_reclen =
 456                     DIRBLKSIZ - prev;
 457                 (void) fwrite(dirbuf, 1, DIRBLKSIZ, df);
 458                 dirloc = 0;
 459         }
 460         memmove(dirbuf + dirloc, dp, (size_t)dp->d_reclen);
 461         prev = dirloc;
 462         dirloc += dp->d_reclen;
 463 }
 464
 465 /*
 466  * flush out a directory that is finished.
 467  */
 468 static void
 469 flushent(void)
 470 {
 471         ((struct direct *)(dirbuf + prev))->d_reclen = DIRBLKSIZ - prev;
 472         (void) fwrite(dirbuf, (int)dirloc, 1, df);
 473         seekpt = ftell(df);
 474         dirloc = 0;
 475 }
 476
 477 static void
 478 dcvt(struct odirect *odp, struct direct *ndp)
 479 {
 480
 481         memset(ndp, 0, (size_t)(sizeof *ndp));
 482         ndp->d_ino =  odp->d_ino;
 483         ndp->d_type = DT_UNKNOWN;
 484         (void) strncpy(ndp->d_name, odp->d_name, ODIRSIZ);
 485         ndp->d_namlen = strlen(ndp->d_name);
 486         ndp->d_reclen = DIRSIZ(0, ndp);
 487 }
 488
 489 /*
 490  * Seek to an entry in a directory.
 491  * Only values returned by rst_telldir should be passed to rst_seekdir.
 492  * This routine handles many directories in a single file.
 493  * It takes the base of the directory in the file, plus
 494  * the desired seek offset into it.
 495  */
 496 static void
 497 rst_seekdir(RST_DIR *dirp, long loc, long base)
 498 {
 499
 500         if (loc == rst_telldir(dirp))
 501                 return;
 502         loc -= base;
 503         if (loc < 0)
 504                 fprintf(stderr, "bad seek pointer to rst_seekdir %ld\n", loc);
 505         (void) lseek(dirp->dd_fd, base + (loc & ~(DIRBLKSIZ - 1)), SEEK_SET);
 506         dirp->dd_loc = loc & (DIRBLKSIZ - 1);
 507         if (dirp->dd_loc != 0)
 508                 dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ);
 509 }
 510
 511 /*
 512  * get next entry in a directory.
 513  */
 514 struct direct *
 515 rst_readdir(RST_DIR *dirp)
 516 {
 517         register struct direct *dp;
 518
 519         for (;;) {
 520                 if (dirp->dd_loc == 0) {
 521                         dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf,
 522                             DIRBLKSIZ);
 523                         if (dirp->dd_size <= 0) {
 524                                 Dprintf(stderr, "error reading directory\n");
 525                                 return (NULL);
 526                         }
 527                 }
 528                 if (dirp->dd_loc >= dirp->dd_size) {
 529                         dirp->dd_loc = 0;
 530                         continue;
 531                 }
 532                 dp = (struct direct *)(dirp->dd_buf + dirp->dd_loc);
 533                 if (dp->d_reclen == 0 ||
 534                     dp->d_reclen > DIRBLKSIZ + 1 - dirp->dd_loc) {
 535                         Dprintf(stderr, "corrupted directory: bad reclen %d\n",
 536                                 dp->d_reclen);
 537                         return (NULL);
 538                 }
 539                 dirp->dd_loc += dp->d_reclen;
 540                 if (dp->d_ino == 0 && strcmp(dp->d_name, "/") == 0)
 541                         return (NULL);
 542                 if (dp->d_ino >= maxino) {
 543                         Dprintf(stderr, "corrupted directory: bad inum %d\n",
 544                                 dp->d_ino);
 545                         continue;
 546                 }
 547                 return (dp);
 548         }
 549 }
 550
 551 /*
 552  * Simulate the opening of a directory
 553  */
 554 RST_DIR *
 555 rst_opendir(const char *name)
 556 {
 557         struct inotab *itp;
 558         RST_DIR *dirp;
 559         ino_t ino;
 560
 561         if ((ino = dirlookup(name)) > 0 &&
 562             (itp = inotablookup(ino)) != NULL) {
 563                 dirp = opendirfile(dirfile);
 564                 rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 565                 return (dirp);
 566         }
 567         return (NULL);
 568 }
 569
 570 /*
 571  * In our case, there is nothing to do when closing a directory.
 572  */
 573 void
 574 rst_closedir(RST_DIR *dirp)
 575 {
 576
 577         (void)close(dirp->dd_fd);
 578         free(dirp);
 579         return;
 580 }
 581
 582 /*
 583  * Simulate finding the current offset in the directory.
 584  */
 585 static long
 586 rst_telldir(RST_DIR *dirp)
 587 {
 588         return ((long)lseek(dirp->dd_fd,
 589             (off_t)0, SEEK_CUR) - dirp->dd_size + dirp->dd_loc);
 590 }
 591
 592 /*
 593  * Open a directory file.
 594  */
 595 static RST_DIR *
 596 opendirfile(const char *name)
 597 {
 598         register RST_DIR *dirp;
 599         register int fd;
 600
 601         if ((fd = open(name, O_RDONLY)) == -1)
 602                 return (NULL);
 603         if ((dirp = malloc(sizeof(RST_DIR))) == NULL) {
 604                 (void)close(fd);
 605                 return (NULL);
 606         }
 607         dirp->dd_fd = fd;
 608         dirp->dd_loc = 0;
 609         return (dirp);
 610 }
 611
 612 /*
 613  * Set the mode, owner, and times for all new or changed directories
 614  */
 615 void
 616 setdirmodes(int flags)
 617 {
 618         FILE *mf;
 619         struct modeinfo node;
 620         struct entry *ep;
 621         char *cp;
 622
 623         Vprintf(stdout, "Set directory mode, owner, and times.\n");
 624         if (command == 'r' || command == 'R')
 625                 (void) snprintf(modefile, sizeof(modefile), "%s/rstmode%lu", tmpdir, (long)dumpdate);
 626         if (modefile[0] == '#') {
 627                 panic("modefile not defined\n");
 628                 fprintf(stderr, "directory mode, owner, and times not set\n");
 629                 return;
 630         }
 631         mf = fopen(modefile, "r");
 632         if (mf == NULL) {
 633                 warn("fopen");
 634                 fprintf(stderr, "cannot open mode file %s\n", modefile);
 635                 fprintf(stderr, "directory mode, owner, and times not set\n");
 636                 return;
 637         }
 638         clearerr(mf);
 639         for (;;) {
 640                 (void) fread((char *)&node, 1, sizeof(struct modeinfo), mf);
 641                 if (feof(mf))
 642                         break;
 643                 ep = lookupino(node.ino);
 644                 if (command == 'i' || command == 'x') {
 645                         if (ep == NULL)
 646                                 continue;
 647                         if ((flags & FORCE) == 0 && ep->e_flags & EXISTED) {
 648                                 ep->e_flags &= ~NEW;
 649                                 continue;
 650                         }
 651                         if (node.ino == ROOTINO &&
 652                             reply("set owner/mode for '.'") == FAIL)
 653                                 continue;
 654                 }
 655                 if (ep == NULL) {
 656                         panic("cannot find directory inode %d\n", node.ino);
 657                 } else {
 658                         cp = myname(ep);
 659                         (void) chown(cp, node.uid, node.gid);
 660                         (void) chmod(cp, node.mode);
 661 #ifdef  __linux__
 662                         (void) setflags(cp, node.flags);
 663 #else
 664                         (void) chflags(cp, node.flags);
 665 #endif
 666                         utimes(cp, node.timep);
 667                         ep->e_flags &= ~NEW;
 668                 }
 669         }
 670         if (ferror(mf))
 671                 panic("error setting directory modes\n");
 672         (void) fclose(mf);
 673 }
 674
 675 /*
 676  * Generate a literal copy of a directory.
 677  */
 678 int
 679 genliteraldir(char *name, ino_t ino)
 680 {
 681         register struct inotab *itp;
 682         int ofile, dp, i, size;
 683         char buf[BUFSIZ];
 684
 685         itp = inotablookup(ino);
 686         if (itp == NULL)
 687                 panic("Cannot find directory inode %d named %s\n", ino, name);
 688         if ((ofile = open(name, O_WRONLY | O_CREAT | O_TRUNC, 0666)) < 0) {
 689                 warn("%s: cannot create file\n", name);
 690                 return (FAIL);
 691         }
 692         rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 693         dp = dup(dirp->dd_fd);
 694         for (i = itp->t_size; i > 0; i -= BUFSIZ) {
 695                 size = i < BUFSIZ ? i : BUFSIZ;
 696                 if (read(dp, buf, (int) size) == -1) {
 697                         warnx("write error extracting inode %lu, name %s\n",
 698                                 (unsigned long)curfile.ino, curfile.name);
 699                         err(1, "read");
 700                 }
 701                 if (!Nflag && write(ofile, buf, (int) size) == -1) {
 702                         warnx("write error extracting inode %lu, name %s\n",
 703                                 (unsigned long)curfile.ino, curfile.name);
 704                         err(1, "write");
 705                 }
 706         }
 707         (void) close(dp);
 708         (void) close(ofile);
 709         return (GOOD);
 710 }
 711
 712 /*
 713  * Determine the type of an inode
 714  */
 715 int
 716 inodetype(ino_t ino)
 717 {
 718         struct inotab *itp;
 719
 720         itp = inotablookup(ino);
 721         if (itp == NULL)
 722                 return (LEAF);
 723         return (NODE);
 724 }
 725
 726 /*
 727  * Allocate and initialize a directory inode entry.
 728  * If requested, save its pertinent mode, owner, and time info.
 729  */
 730 static struct inotab *
 731 #ifdef  __linux__
 732 allocinotab(ino_t ino, struct new_bsd_inode *dip, long seekpt)
 733 #else
 734 allocinotab(ino_t ino, struct dinode *dip, long seekpt)
 735 #endif
 736 {
 737         register struct inotab  *itp;
 738         struct modeinfo node;
 739
 740         itp = calloc(1, sizeof(struct inotab));
 741         if (itp == NULL)
 742                 panic("no memory directory table\n");
 743         itp->t_next = inotab[INOHASH(ino)];
 744         inotab[INOHASH(ino)] = itp;
 745         itp->t_ino = ino;
 746         itp->t_seekpt = seekpt;
 747         if (mf == NULL)
 748                 return (itp);
 749         node.ino = ino;
 750 #ifdef  __linux__
 751         node.timep[0].tv_sec = dip->di_atime.tv_sec;
 752         node.timep[0].tv_usec = dip->di_atime.tv_usec;
 753         node.timep[1].tv_sec = dip->di_mtime.tv_sec;
 754         node.timep[1].tv_usec = dip->di_mtime.tv_usec;
 755 #else   /* __linux__ */
 756         node.timep[0].tv_sec = dip->di_atime;
 757         node.timep[0].tv_usec = dip->di_atimensec / 1000;
 758         node.timep[1].tv_sec = dip->di_mtime;
 759         node.timep[1].tv_usec = dip->di_mtimensec / 1000;
 760 #endif  /* __linux__ */
 761         node.mode = dip->di_mode;
 762         node.flags = dip->di_flags;
 763         node.uid = dip->di_uid;
 764         node.gid = dip->di_gid;
 765         (void) fwrite((char *)&node, 1, sizeof(struct modeinfo), mf);
 766         return (itp);
 767 }
 768
 769 /*
 770  * Look up an inode in the table of directories
 771  */
 772 static struct inotab *
 773 inotablookup(ino_t ino)
 774 {
 775         register struct inotab *itp;
 776
 777         for (itp = inotab[INOHASH(ino)]; itp != NULL; itp = itp->t_next)
 778                 if (itp->t_ino == ino)
 779                         return (itp);
 780         return (NULL);
 781 }
 782
 783 /*
 784  * Clean up and exit
 785  */
 786 void
 787 cleanup(void)
 788 {
 789         closemt();
 790         if (modefile[0] != '#')
 791                 (void) unlink(modefile);
 792         if (dirfile[0] != '#')
 793                 (void) unlink(dirfile);
 794 }