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 <stelian@popies.net>, 1999-2000
   6  *      Stelian Pop <stelian@popies.net> - Alcôve <www.alcove.com>, 2000-2002
   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 1.22 2003/01/10 14:42:51 stelian Exp $";
  50 #endif /* not lint */
  51
  52 #include <config.h>
  53 #include <sys/param.h>
  54 #include <sys/file.h>
  55 #include <sys/stat.h>
  56
  57 #ifdef  __linux__
  58 #ifdef HAVE_EXT2FS_EXT2_FS_H
  59 #include <ext2fs/ext2_fs.h>
  60 #else
  61 #include <linux/ext2_fs.h>
  62 #endif
  63 #include <bsdcompat.h>
  64 #else   /* __linux__ */
  65 #include <ufs/ufs/dinode.h>
  66 #include <ufs/ufs/dir.h>
  67 #endif  /* __linux__ */
  68 #include <protocols/dumprestore.h>
  69
  70 #include <compaterr.h>
  71 #include <errno.h>
  72 #include <stdio.h>
  73 #include <stdlib.h>
  74 #include <string.h>
  75 #include <unistd.h>
  76
  77 #ifdef  __linux__
  78 #include <endian.h>
  79 #else
  80 #include <machine/endian.h>
  81 #endif
  82
  83 #include "pathnames.h"
  84 #include "restore.h"
  85 #include "extern.h"
  86
  87 /*
  88  * Symbol table of directories read from tape.
  89  */
  90 #define HASHSIZE        1000
  91 #define INOHASH(val) (val % HASHSIZE)
  92 struct inotab {
  93         struct  inotab *t_next;
  94         dump_ino_t t_ino;
  95         int32_t t_seekpt;
  96         int32_t t_size;
  97 };
  98 static struct inotab *inotab[HASHSIZE];
  99
 100 /*
 101  * Information retained about directories.
 102  */
 103 struct modeinfo {
 104         dump_ino_t ino;
 105         struct timeval timep[2];
 106         mode_t mode;
 107         uid_t uid;
 108         gid_t gid;
 109         unsigned int flags;
 110 };
 111
 112 /*
 113  * Definitions for library routines operating on directories.
 114  */
 115 #undef DIRBLKSIZ
 116 #define DIRBLKSIZ 1024
 117 struct rstdirdesc {
 118         int     dd_fd;
 119         int32_t dd_loc;
 120         int32_t dd_size;
 121         char    dd_buf[DIRBLKSIZ];
 122 };
 123
 124 /*
 125  * Global variables for this file.
 126  */
 127 static long     seekpt;
 128 static FILE     *df, *mf;
 129 static RST_DIR  *dirp;
 130 static char     dirfile[MAXPATHLEN] = "#";      /* No file */
 131 static char     modefile[MAXPATHLEN] = "#";     /* No file */
 132 static char     dot[2] = ".";                   /* So it can be modified */
 133
 134 /*
 135  * Format of old style directories.
 136  */
 137 #define ODIRSIZ 14
 138 struct odirect {
 139         u_short d_ino;
 140         char    d_name[ODIRSIZ];
 141 };
 142
 143 #if defined(__linux__) || defined(sunos)
 144 static struct inotab    *allocinotab __P((dump_ino_t, struct new_bsd_inode *, long));
 145 #else
 146 static struct inotab    *allocinotab __P((dump_ino_t, struct dinode *, long));
 147 #endif
 148 static void              dcvt __P((struct odirect *, struct direct *));
 149 static void              flushent __P((void));
 150 static struct inotab    *inotablookup __P((dump_ino_t));
 151 static RST_DIR          *opendirfile __P((const char *));
 152 static void              putdir __P((char *, size_t));
 153 static void              putent __P((struct direct *));
 154 static void              rst_seekdir __P((RST_DIR *, long, long));
 155 static long              rst_telldir __P((RST_DIR *));
 156 static struct direct    *searchdir __P((dump_ino_t, char *));
 157
 158 /*
 159  *      Extract directory contents, building up a directory structure
 160  *      on disk for extraction by name.
 161  *      If genmode is requested, save mode, owner, and times for all
 162  *      directories on the tape.
 163  */
 164 void
 165 extractdirs(int genmode)
 166 {
 167         int i;
 168 #if defined(__linux__) || defined(sunos)
 169         struct new_bsd_inode *ip;
 170 #else
 171         struct dinode *ip;
 172 #endif
 173         struct inotab *itp;
 174         struct direct nulldir;
 175         int fd;
 176
 177         Vprintf(stdout, "Extract directories from tape\n");
 178         (void) snprintf(dirfile, sizeof(dirfile), "%s/rstdir%ld", tmpdir,
 179                 (long)dumpdate);
 180         if (command != 'r' && command != 'R') {
 181                 (void) strncat(dirfile, "-XXXXXX",
 182                         sizeof(dirfile) - strlen(dirfile));
 183                 fd = mkstemp(dirfile);
 184         } else
 185                 fd = open(dirfile, O_RDWR|O_CREAT|O_EXCL, 0666);
 186         if (fd == -1 || (df = fdopen(fd, "w")) == NULL) {
 187                 if (fd != -1)
 188                         close(fd);
 189                 err(1, "cannot create directory temporary %s", dirfile);
 190         }
 191         if (genmode != 0) {
 192                 (void) snprintf(modefile, sizeof(modefile), "%s/rstmode%ld", tmpdir, (long)dumpdate);
 193                 if (command != 'r' && command != 'R') {
 194                         (void) strncat(modefile, "-XXXXXX",
 195                                 sizeof(modefile) - strlen(modefile));
 196                         fd = mkstemp(modefile);
 197                 } else
 198                         fd = open(modefile, O_RDWR|O_CREAT|O_EXCL, 0666);
 199                 if (fd == -1 || (mf = fdopen(fd, "w")) == NULL) {
 200                         if (fd != -1)
 201                                 close(fd);
 202                         err(1, "cannot create modefile %s", modefile);
 203                 }
 204         }
 205         nulldir.d_ino = 0;
 206         nulldir.d_type = DT_DIR;
 207         nulldir.d_namlen = 1;
 208         nulldir.d_name[0] = '/';
 209         nulldir.d_name[1] = '\0';
 210         nulldir.d_reclen = DIRSIZ(0, &nulldir);
 211         for (;;) {
 212                 curfile.name = "<directory file - name unknown>";
 213                 curfile.action = USING;
 214                 ip = curfile.dip;
 215                 if (ip == NULL || (ip->di_mode & IFMT) != IFDIR) {
 216                         if ( fclose(df) == EOF )
 217                                 err(1, "cannot write to file %s", dirfile);
 218                         dirp = opendirfile(dirfile);
 219                         if (dirp == NULL)
 220                                 warn("opendirfile");
 221                         if (mf != NULL && fclose(mf) == EOF )
 222                                 err(1, "cannot write to file %s", dirfile);
 223                         i = dirlookup(dot);
 224                         if (i == 0)
 225                                 panic("Root directory is not on tape\n");
 226                         return;
 227                 }
 228                 itp = allocinotab(curfile.ino, ip, seekpt);
 229                 getfile(putdir, xtrnull);
 230                 putent(&nulldir);
 231                 flushent();
 232                 itp->t_size = seekpt - itp->t_seekpt;
 233         }
 234 }
 235
 236 /*
 237  * skip over all the directories on the tape
 238  */
 239 void
 240 skipdirs(void)
 241 {
 242
 243         while (curfile.dip && (curfile.dip->di_mode & IFMT) == IFDIR) {
 244                 skipfile();
 245         }
 246 }
 247
 248 /*
 249  *      Recursively find names and inumbers of all files in subtree
 250  *      pname and pass them off to be processed.
 251  */
 252 void
 253 treescan(char *pname, dump_ino_t ino, long (*todo) __P((char *, dump_ino_t, int)))
 254 {
 255         struct inotab *itp;
 256         struct direct *dp;
 257         int namelen;
 258         long bpt;
 259         char locname[MAXPATHLEN + 1];
 260
 261         itp = inotablookup(ino);
 262         if (itp == NULL) {
 263                 /*
 264                  * Pname is name of a simple file or an unchanged directory.
 265                  */
 266                 (void) (*todo)(pname, ino, LEAF);
 267                 return;
 268         }
 269         /*
 270          * Pname is a dumped directory name.
 271          */
 272         if ((*todo)(pname, ino, NODE) == FAIL)
 273                 return;
 274         /*
 275          * begin search through the directory
 276          * skipping over "." and ".."
 277          */
 278         namelen = snprintf(locname, sizeof(locname), "%s/", pname);
 279         if (namelen >= (int)sizeof(locname))
 280                 namelen = sizeof(locname) - 1;
 281         rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 282         dp = rst_readdir(dirp); /* "." */
 283         if (dp != NULL && strcmp(dp->d_name, ".") == 0)
 284                 dp = rst_readdir(dirp); /* ".." */
 285         else
 286                 fprintf(stderr, "Warning: `.' missing from directory %s\n",
 287                         pname);
 288         if (dp != NULL && strcmp(dp->d_name, "..") == 0)
 289                 dp = rst_readdir(dirp); /* first real entry */
 290         else
 291                 fprintf(stderr, "Warning: `..' missing from directory %s\n",
 292                         pname);
 293         bpt = rst_telldir(dirp);
 294         /*
 295          * a zero inode signals end of directory
 296          */
 297         while (dp != NULL) {
 298                 locname[namelen] = '\0';
 299                 if (namelen + dp->d_namlen >= (int)sizeof(locname)) {
 300                         fprintf(stderr, "%s%s: name exceeds %ld char\n",
 301                                 locname, dp->d_name, (long)sizeof(locname) - 1);
 302                 } else {
 303                         (void) strncat(locname, dp->d_name, (int)dp->d_namlen);
 304                         treescan(locname, dp->d_ino, todo);
 305                         rst_seekdir(dirp, bpt, itp->t_seekpt);
 306                 }
 307                 dp = rst_readdir(dirp);
 308                 bpt = rst_telldir(dirp);
 309         }
 310 }
 311
 312 /*
 313  * Lookup a pathname which is always assumed to start from the ROOTINO.
 314  */
 315 struct direct *
 316 pathsearch(const char *pathname)
 317 {
 318         dump_ino_t ino;
 319         struct direct *dp;
 320         char *path, *name, buffer[MAXPATHLEN];
 321
 322         strcpy(buffer, pathname);
 323         path = buffer;
 324         ino = ROOTINO;
 325         while (*path == '/')
 326                 path++;
 327         dp = NULL;
 328 #ifdef __linux__
 329         while ((name = strsep(&path, "/")) != NULL && *name /* != NULL */) {
 330 #else
 331         while ((name = strtok_r(NULL, "/", &path)) != NULL && *name /* != NULL */) {
 332 #endif
 333                 if ((dp = searchdir(ino, name)) == NULL)
 334                         return (NULL);
 335                 ino = dp->d_ino;
 336         }
 337         return (dp);
 338 }
 339
 340 /*
 341  * Lookup the requested name in directory inum.
 342  * Return its inode number if found, zero if it does not exist.
 343  */
 344 static struct direct *
 345 searchdir(dump_ino_t inum, char *name)
 346 {
 347         struct direct *dp;
 348         struct inotab *itp;
 349         int len;
 350
 351         itp = inotablookup(inum);
 352         if (itp == NULL)
 353                 return (NULL);
 354         rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 355         len = strlen(name);
 356         do {
 357                 dp = rst_readdir(dirp);
 358                 if (dp == NULL)
 359                         return (NULL);
 360         } while (dp->d_namlen != len || strncmp(dp->d_name, name, len) != 0);
 361         return (dp);
 362 }
 363
 364 /*
 365  * Put the directory entries in the directory file
 366  */
 367 static void
 368 putdir(char *buf, size_t size)
 369 {
 370         struct direct cvtbuf;
 371         struct odirect *odp;
 372         struct odirect *eodp;
 373         struct direct *dp;
 374         long loc, i;
 375
 376         if (cvtflag) {
 377                 eodp = (struct odirect *)&buf[size];
 378                 for (odp = (struct odirect *)buf; odp < eodp; odp++)
 379                         if (odp->d_ino != 0) {
 380                                 dcvt(odp, &cvtbuf);
 381                                 putent(&cvtbuf);
 382                         }
 383         } else {
 384                 for (loc = 0; loc < (long)size; ) {
 385                         dp = (struct direct *)(buf + loc);
 386 #ifdef  DIRDEBUG
 387                         printf ("reclen = %d, namlen = %d, type = %d\n",
 388                                 dp->d_reclen, dp->d_namlen, dp->d_type);
 389 #endif
 390                         if (Bcvt)
 391                                 swabst((u_char *)"is", (u_char *) dp);
 392                         if (oldinofmt && dp->d_ino != 0) {
 393 #                               if BYTE_ORDER == BIG_ENDIAN
 394                                         if (Bcvt)
 395                                                 dp->d_namlen = dp->d_type;
 396 #                               else
 397                                         if (!Bcvt)
 398                                                 dp->d_namlen = dp->d_type;
 399 #                               endif
 400                                 if (dp->d_namlen == 0 && dp->d_type != 0)
 401                                         dp->d_namlen = dp->d_type;
 402                                 dp->d_type = DT_UNKNOWN;
 403                         }
 404 #ifdef  DIRDEBUG
 405                         printf ("reclen = %d, namlen = %d, type = %d\n",
 406                                 dp->d_reclen, dp->d_namlen, dp->d_type);
 407 #endif
 408                         i = DIRBLKSIZ - (loc & (DIRBLKSIZ - 1));
 409                         if ((dp->d_reclen & 0x3) != 0 ||
 410                             dp->d_reclen > i ||
 411                             dp->d_reclen < DIRSIZ(0, dp) ||
 412                             dp->d_namlen > MAXNAMLEN) {
 413                                 Vprintf(stdout, "Mangled directory: ");
 414                                 if ((dp->d_reclen & 0x3) != 0)
 415                                         Vprintf(stdout,
 416                                            "reclen not multiple of 4 ");
 417                                 if (dp->d_reclen < DIRSIZ(0, dp))
 418                                         Vprintf(stdout,
 419                                            "reclen less than DIRSIZ (%d < %d) ",
 420                                            dp->d_reclen, DIRSIZ(0, dp));
 421                                 if (dp->d_namlen > MAXNAMLEN)
 422                                         Vprintf(stdout,
 423                                            "reclen name too big (%d > %d) ",
 424                                            dp->d_namlen, MAXNAMLEN);
 425                                 Vprintf(stdout, "\n");
 426                                 loc += i;
 427                                 continue;
 428                         }
 429                         loc += dp->d_reclen;
 430                         if (dp->d_ino != 0) {
 431                                 putent(dp);
 432                         }
 433                 }
 434         }
 435 }
 436
 437 /*
 438  * These variables are "local" to the following two functions.
 439  */
 440 static char dirbuf[DIRBLKSIZ];
 441 static long dirloc = 0;
 442 static long prev = 0;
 443
 444 /*
 445  * add a new directory entry to a file.
 446  */
 447 static void
 448 putent(struct direct *dp)
 449 {
 450         dp->d_reclen = DIRSIZ(0, dp);
 451         if (dirloc + dp->d_reclen > DIRBLKSIZ) {
 452                 ((struct direct *)(dirbuf + prev))->d_reclen =
 453                     DIRBLKSIZ - prev;
 454                 if ( fwrite(dirbuf, 1, DIRBLKSIZ, df) != DIRBLKSIZ )
 455                         err(1,"cannot write to file %s", dirfile);
 456                 dirloc = 0;
 457         }
 458         memmove(dirbuf + dirloc, dp, (size_t)dp->d_reclen);
 459         prev = dirloc;
 460         dirloc += dp->d_reclen;
 461 }
 462
 463 /*
 464  * flush out a directory that is finished.
 465  */
 466 static void
 467 flushent(void)
 468 {
 469         ((struct direct *)(dirbuf + prev))->d_reclen = DIRBLKSIZ - prev;
 470         if ( fwrite(dirbuf, (int)dirloc, 1, df) != 1 )
 471                 err(1, "cannot write to file %s", dirfile);
 472         seekpt = ftell(df);
 473         if (seekpt == -1)
 474                 err(1, "cannot write to file %s", dirfile);
 475         dirloc = 0;
 476 }
 477
 478 static void
 479 dcvt(struct odirect *odp, struct direct *ndp)
 480 {
 481
 482         memset(ndp, 0, (size_t)(sizeof *ndp));
 483         ndp->d_ino =  odp->d_ino;
 484         ndp->d_type = DT_UNKNOWN;
 485         (void) strncpy(ndp->d_name, odp->d_name, ODIRSIZ);
 486         ndp->d_namlen = strlen(ndp->d_name);
 487         ndp->d_reclen = DIRSIZ(0, ndp);
 488 }
 489
 490 /*
 491  * Seek to an entry in a directory.
 492  * Only values returned by rst_telldir should be passed to rst_seekdir.
 493  * This routine handles many directories in a single file.
 494  * It takes the base of the directory in the file, plus
 495  * the desired seek offset into it.
 496  */
 497 static void
 498 rst_seekdir(RST_DIR *dirp, long loc, long base)
 499 {
 500
 501         if (loc == rst_telldir(dirp))
 502                 return;
 503         loc -= base;
 504         if (loc < 0)
 505                 fprintf(stderr, "bad seek pointer to rst_seekdir %ld\n", loc);
 506         (void) lseek(dirp->dd_fd, base + (loc & ~(DIRBLKSIZ - 1)), SEEK_SET);
 507         dirp->dd_loc = loc & (DIRBLKSIZ - 1);
 508         if (dirp->dd_loc != 0)
 509                 dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ);
 510 }
 511
 512 /*
 513  * get next entry in a directory.
 514  */
 515 struct direct *
 516 rst_readdir(RST_DIR *dirp)
 517 {
 518         struct direct *dp;
 519
 520         for (;;) {
 521                 if (dirp->dd_loc == 0) {
 522                         dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf,
 523                             DIRBLKSIZ);
 524                         if (dirp->dd_size <= 0) {
 525                                 Dprintf(stderr, "error reading directory\n");
 526                                 return (NULL);
 527                         }
 528                 }
 529                 if (dirp->dd_loc >= dirp->dd_size) {
 530                         dirp->dd_loc = 0;
 531                         continue;
 532                 }
 533                 dp = (struct direct *)(dirp->dd_buf + dirp->dd_loc);
 534                 if (dp->d_reclen == 0 ||
 535                     dp->d_reclen > DIRBLKSIZ + 1 - dirp->dd_loc) {
 536                         Dprintf(stderr, "corrupted directory: bad reclen %d\n",
 537                                 dp->d_reclen);
 538                         return (NULL);
 539                 }
 540                 dirp->dd_loc += dp->d_reclen;
 541                 if (dp->d_ino == 0 && strcmp(dp->d_name, "/") == 0)
 542                         return (NULL);
 543                 if (dp->d_ino >= maxino) {
 544                         Dprintf(stderr, "corrupted directory: bad inum %d\n",
 545                                 dp->d_ino);
 546                         continue;
 547                 }
 548                 return (dp);
 549         }
 550 }
 551
 552 /*
 553  * Simulate the opening of a directory
 554  */
 555 RST_DIR *
 556 rst_opendir(const char *name)
 557 {
 558         struct inotab *itp;
 559         RST_DIR *dirp;
 560         dump_ino_t ino;
 561
 562         if ((ino = dirlookup(name)) > 0 &&
 563             (itp = inotablookup(ino)) != NULL) {
 564                 dirp = opendirfile(dirfile);
 565                 rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 566                 return (dirp);
 567         }
 568         return (NULL);
 569 }
 570
 571 /*
 572  * In our case, there is nothing to do when closing a directory.
 573  */
 574 void
 575 rst_closedir(RST_DIR *dirp)
 576 {
 577
 578         (void)close(dirp->dd_fd);
 579         free(dirp);
 580         return;
 581 }
 582
 583 /*
 584  * Simulate finding the current offset in the directory.
 585  */
 586 static long
 587 rst_telldir(RST_DIR *dirp)
 588 {
 589         return ((long)lseek(dirp->dd_fd,
 590             (OFF_T)0, SEEK_CUR) - dirp->dd_size + dirp->dd_loc);
 591 }
 592
 593 /*
 594  * Open a directory file.
 595  */
 596 static RST_DIR *
 597 opendirfile(const char *name)
 598 {
 599         RST_DIR *dirp;
 600         int fd;
 601
 602         if ((fd = open(name, O_RDONLY)) == -1)
 603                 return (NULL);
 604         if ((dirp = malloc(sizeof(RST_DIR))) == NULL) {
 605                 (void)close(fd);
 606                 return (NULL);
 607         }
 608         dirp->dd_fd = fd;
 609         dirp->dd_loc = 0;
 610         return (dirp);
 611 }
 612
 613 /*
 614  * Set the mode, owner, and times for all new or changed directories
 615  */
 616 void
 617 setdirmodes(int flags)
 618 {
 619         FILE *mf;
 620         struct modeinfo node;
 621         struct entry *ep;
 622         char *cp;
 623
 624         Vprintf(stdout, "Set directory mode, owner, and times.\n");
 625         if (command == 'r' || command == 'R')
 626                 (void) snprintf(modefile, sizeof(modefile), "%s/rstmode%lu", tmpdir, (long)dumpdate);
 627         if (modefile[0] == '#') {
 628                 panic("modefile not defined\n");
 629                 fprintf(stderr, "directory mode, owner, and times not set\n");
 630                 return;
 631         }
 632         mf = fopen(modefile, "r");
 633         if (mf == NULL) {
 634                 warn("fopen");
 635                 fprintf(stderr, "cannot open mode file %s\n", modefile);
 636                 fprintf(stderr, "directory mode, owner, and times not set\n");
 637                 return;
 638         }
 639         clearerr(mf);
 640         for (;;) {
 641                 (void) fread((char *)&node, 1, sizeof(struct modeinfo), mf);
 642                 if (feof(mf))
 643                         break;
 644                 ep = lookupino(node.ino);
 645                 if (command == 'i' || command == 'x') {
 646                         if (ep == NULL)
 647                                 continue;
 648                         if ((flags & FORCE) == 0 && ep->e_flags & EXISTED) {
 649                                 ep->e_flags &= ~NEW;
 650                                 continue;
 651                         }
 652                         if ((flags & FORCE) == 0 &&
 653                             node.ino == ROOTINO &&
 654                             reply("set owner/mode for '.'") == FAIL)
 655                                 continue;
 656                 }
 657                 if (ep == NULL) {
 658                         panic("cannot find directory inode %d\n", node.ino);
 659                 } else {
 660                         cp = myname(ep);
 661                         (void) chown(cp, node.uid, node.gid);
 662                         (void) chmod(cp, node.mode);
 663                         if (node.flags)
 664 #ifdef  __linux__
 665                                 (void) fsetflags(cp, node.flags);
 666 #else
 667                                 (void) chflags(cp, node.flags);
 668 #endif
 669                         utimes(cp, node.timep);
 670                         ep->e_flags &= ~NEW;
 671                 }
 672         }
 673         if (ferror(mf))
 674                 panic("error setting directory modes\n");
 675         (void) fclose(mf);
 676 }
 677
 678 /*
 679  * Generate a literal copy of a directory.
 680  */
 681 int
 682 genliteraldir(char *name, dump_ino_t ino)
 683 {
 684         struct inotab *itp;
 685         int ofile, dp, i, size;
 686         char buf[BUFSIZ];
 687
 688         itp = inotablookup(ino);
 689         if (itp == NULL)
 690                 panic("Cannot find directory inode %d named %s\n", ino, name);
 691         if ((ofile = open(name, O_WRONLY | O_CREAT | O_TRUNC, 0666)) < 0) {
 692                 warn("%s: cannot create file\n", name);
 693                 return (FAIL);
 694         }
 695         rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 696         dp = dup(dirp->dd_fd);
 697         for (i = itp->t_size; i > 0; i -= BUFSIZ) {
 698                 size = i < BUFSIZ ? i : BUFSIZ;
 699                 if (read(dp, buf, (int) size) == -1) {
 700                         warnx("write error extracting inode %lu, name %s\n",
 701                                 (unsigned long)curfile.ino, curfile.name);
 702                         err(1, "read");
 703                 }
 704                 if (!Nflag && write(ofile, buf, (int) size) == -1) {
 705                         warnx("write error extracting inode %lu, name %s\n",
 706                                 (unsigned long)curfile.ino, curfile.name);
 707                         err(1, "write");
 708                 }
 709         }
 710         (void) close(dp);
 711         (void) close(ofile);
 712         return (GOOD);
 713 }
 714
 715 /*
 716  * Determine the type of an inode
 717  */
 718 int
 719 inodetype(dump_ino_t ino)
 720 {
 721         struct inotab *itp;
 722
 723         itp = inotablookup(ino);
 724         if (itp == NULL)
 725                 return (LEAF);
 726         return (NODE);
 727 }
 728
 729 /*
 730  * Allocate and initialize a directory inode entry.
 731  * If requested, save its pertinent mode, owner, and time info.
 732  */
 733 static struct inotab *
 734 #ifdef  __linux__
 735 allocinotab(dump_ino_t ino, struct new_bsd_inode *dip, long seekpt)
 736 #else
 737 allocinotab(dump_ino_t ino, struct dinode *dip, long seekpt)
 738 #endif
 739 {
 740         struct inotab   *itp;
 741         struct modeinfo node;
 742
 743         itp = calloc(1, sizeof(struct inotab));
 744         if (itp == NULL)
 745                 panic("no memory directory table\n");
 746         itp->t_next = inotab[INOHASH(ino)];
 747         inotab[INOHASH(ino)] = itp;
 748         itp->t_ino = ino;
 749         itp->t_seekpt = seekpt;
 750         if (mf == NULL)
 751                 return (itp);
 752         node.ino = ino;
 753 #ifdef  __linux__
 754         node.timep[0].tv_sec = dip->di_atime.tv_sec;
 755         node.timep[0].tv_usec = dip->di_atime.tv_usec;
 756         node.timep[1].tv_sec = dip->di_mtime.tv_sec;
 757         node.timep[1].tv_usec = dip->di_mtime.tv_usec;
 758 #else   /* __linux__ */
 759         node.timep[0].tv_sec = dip->di_atime;
 760         node.timep[0].tv_usec = dip->di_atimensec / 1000;
 761         node.timep[1].tv_sec = dip->di_mtime;
 762         node.timep[1].tv_usec = dip->di_mtimensec / 1000;
 763 #endif  /* __linux__ */
 764         node.mode = dip->di_mode;
 765         node.flags = dip->di_flags;
 766         node.uid = dip->di_uid;
 767         node.gid = dip->di_gid;
 768         if ( fwrite((char *)&node, 1, sizeof(struct modeinfo), mf) != sizeof(struct modeinfo) )
 769                 err(1,"cannot write to file %s", modefile);
 770         return (itp);
 771 }
 772
 773 /*
 774  * Look up an inode in the table of directories
 775  */
 776 static struct inotab *
 777 inotablookup(dump_ino_t ino)
 778 {
 779         struct inotab *itp;
 780
 781         for (itp = inotab[INOHASH(ino)]; itp != NULL; itp = itp->t_next)
 782                 if (itp->t_ino == ino)
 783                         return (itp);
 784         return (NULL);
 785 }
 786
 787 /*
 788  * Clean up and exit
 789  */
 790 void
 791 cleanup(void)
 792 {
 793         closemt();
 794         if (modefile[0] != '#')
 795                 (void) unlink(modefile);
 796         if (dirfile[0] != '#')
 797                 (void) unlink(dirfile);
 798 }