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 1.14 2001/03/20 10:02:48 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 #include <linux/ext2_fs.h>
  59 #include <bsdcompat.h>
  60 #else   /* __linux__ */
  61 #include <ufs/ufs/dinode.h>
  62 #include <ufs/ufs/dir.h>
  63 #endif  /* __linux__ */
  64 #include <protocols/dumprestore.h>
  65
  66 #include <compaterr.h>
  67 #include <errno.h>
  68 #include <stdio.h>
  69 #include <stdlib.h>
  70 #include <string.h>
  71 #include <unistd.h>
  72
  73 #ifdef  __linux__
  74 #include <endian.h>
  75 #else
  76 #include <machine/endian.h>
  77 #endif
  78
  79 #include "pathnames.h"
  80 #include "restore.h"
  81 #include "extern.h"
  82
  83 /*
  84  * Symbol table of directories read from tape.
  85  */
  86 #define HASHSIZE        1000
  87 #define INOHASH(val) (val % HASHSIZE)
  88 struct inotab {
  89         struct  inotab *t_next;
  90         dump_ino_t t_ino;
  91         int32_t t_seekpt;
  92         int32_t t_size;
  93 };
  94 static struct inotab *inotab[HASHSIZE];
  95
  96 /*
  97  * Information retained about directories.
  98  */
  99 struct modeinfo {
 100         dump_ino_t ino;
 101         struct timeval timep[2];
 102         mode_t mode;
 103         uid_t uid;
 104         gid_t gid;
 105         unsigned int flags;
 106 };
 107
 108 /*
 109  * Definitions for library routines operating on directories.
 110  */
 111 #undef DIRBLKSIZ
 112 #define DIRBLKSIZ 1024
 113 struct rstdirdesc {
 114         int     dd_fd;
 115         int32_t dd_loc;
 116         int32_t dd_size;
 117         char    dd_buf[DIRBLKSIZ];
 118 };
 119
 120 /*
 121  * Global variables for this file.
 122  */
 123 static long     seekpt;
 124 static FILE     *df, *mf;
 125 static RST_DIR  *dirp;
 126 static char     dirfile[MAXPATHLEN] = "#";      /* No file */
 127 static char     modefile[MAXPATHLEN] = "#";     /* No file */
 128 static char     dot[2] = ".";                   /* So it can be modified */
 129
 130 /*
 131  * Format of old style directories.
 132  */
 133 #define ODIRSIZ 14
 134 struct odirect {
 135         u_short d_ino;
 136         char    d_name[ODIRSIZ];
 137 };
 138
 139 #ifdef  __linux__
 140 static struct inotab    *allocinotab __P((dump_ino_t, struct new_bsd_inode *, long));
 141 #else
 142 static struct inotab    *allocinotab __P((dump_ino_t, struct dinode *, long));
 143 #endif
 144 static void              dcvt __P((struct odirect *, struct direct *));
 145 static void              flushent __P((void));
 146 static struct inotab    *inotablookup __P((dump_ino_t));
 147 static RST_DIR          *opendirfile __P((const char *));
 148 static void              putdir __P((char *, size_t));
 149 static void              putent __P((struct direct *));
 150 static void              rst_seekdir __P((RST_DIR *, long, long));
 151 static long              rst_telldir __P((RST_DIR *));
 152 static struct direct    *searchdir __P((dump_ino_t, char *));
 153
 154 /*
 155  *      Extract directory contents, building up a directory structure
 156  *      on disk for extraction by name.
 157  *      If genmode is requested, save mode, owner, and times for all
 158  *      directories on the tape.
 159  */
 160 void
 161 extractdirs(int genmode)
 162 {
 163         register int i;
 164 #ifdef  __linux__
 165         register struct new_bsd_inode *ip;
 166 #else
 167         register struct dinode *ip;
 168 #endif
 169         struct inotab *itp;
 170         struct direct nulldir;
 171         int fd;
 172
 173         Vprintf(stdout, "Extract directories from tape\n");
 174         (void) snprintf(dirfile, sizeof(dirfile), "%s/rstdir%ld", tmpdir,
 175                 (long)dumpdate);
 176         if (command != 'r' && command != 'R') {
 177                 (void) strncat(dirfile, "-XXXXXX",
 178                         sizeof(dirfile) - strlen(dirfile));
 179                 fd = mkstemp(dirfile);
 180         } else
 181                 fd = open(dirfile, O_RDWR|O_CREAT|O_EXCL, 0666);
 182         if (fd == -1 || (df = fdopen(fd, "w")) == NULL) {
 183                 if (fd != -1)
 184                         close(fd);
 185                 err(1, "cannot create directory temporary %s", dirfile);
 186         }
 187         if (genmode != 0) {
 188                 (void) snprintf(modefile, sizeof(modefile), "%s/rstmode%ld", tmpdir, (long)dumpdate);
 189                 if (command != 'r' && command != 'R') {
 190                         (void) strncat(modefile, "-XXXXXX",
 191                                 sizeof(modefile) - strlen(modefile));
 192                         fd = mkstemp(modefile);
 193                 } else
 194                         fd = open(modefile, O_RDWR|O_CREAT|O_EXCL, 0666);
 195                 if (fd == -1 || (mf = fdopen(fd, "w")) == NULL) {
 196                         if (fd != -1)
 197                                 close(fd);
 198                         err(1, "cannot create modefile %s", modefile);
 199                 }
 200         }
 201         nulldir.d_ino = 0;
 202         nulldir.d_type = DT_DIR;
 203         nulldir.d_namlen = 1;
 204         nulldir.d_name[0] = '/';
 205         nulldir.d_name[1] = '\0';
 206         nulldir.d_reclen = DIRSIZ(0, &nulldir);
 207         for (;;) {
 208                 curfile.name = "<directory file - name unknown>";
 209                 curfile.action = USING;
 210                 ip = curfile.dip;
 211                 if (ip == NULL || (ip->di_mode & IFMT) != IFDIR) {
 212                         if ( fclose(df) == EOF )
 213                                 err(1, "cannot write to file %s", dirfile);
 214                         dirp = opendirfile(dirfile);
 215                         if (dirp == NULL)
 216                                 warn("opendirfile");
 217                         if (mf != NULL && fclose(mf) == EOF )
 218                                 err(1, "cannot write to file %s", dirfile);
 219                         i = dirlookup(dot);
 220                         if (i == 0)
 221                                 panic("Root directory is not on tape\n");
 222                         return;
 223                 }
 224                 itp = allocinotab(curfile.ino, ip, seekpt);
 225                 getfile(putdir, xtrnull);
 226                 putent(&nulldir);
 227                 flushent();
 228                 itp->t_size = seekpt - itp->t_seekpt;
 229         }
 230 }
 231
 232 /*
 233  * skip over all the directories on the tape
 234  */
 235 void
 236 skipdirs(void)
 237 {
 238
 239         while (curfile.dip && (curfile.dip->di_mode & IFMT) == IFDIR) {
 240                 skipfile();
 241         }
 242 }
 243
 244 /*
 245  *      Recursively find names and inumbers of all files in subtree
 246  *      pname and pass them off to be processed.
 247  */
 248 void
 249 treescan(char *pname, dump_ino_t ino, long (*todo) __P((char *, dump_ino_t, int)))
 250 {
 251         register struct inotab *itp;
 252         register struct direct *dp;
 253         int namelen;
 254         long bpt;
 255         char locname[MAXPATHLEN + 1];
 256
 257         itp = inotablookup(ino);
 258         if (itp == NULL) {
 259                 /*
 260                  * Pname is name of a simple file or an unchanged directory.
 261                  */
 262                 (void) (*todo)(pname, ino, LEAF);
 263                 return;
 264         }
 265         /*
 266          * Pname is a dumped directory name.
 267          */
 268         if ((*todo)(pname, ino, NODE) == FAIL)
 269                 return;
 270         /*
 271          * begin search through the directory
 272          * skipping over "." and ".."
 273          */
 274         namelen = snprintf(locname, sizeof(locname), "%s/", pname);
 275         if (namelen >= sizeof(locname))
 276                 namelen = sizeof(locname) - 1;
 277         rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 278         dp = rst_readdir(dirp); /* "." */
 279         if (dp != NULL && strcmp(dp->d_name, ".") == 0)
 280                 dp = rst_readdir(dirp); /* ".." */
 281         else
 282                 fprintf(stderr, "Warning: `.' missing from directory %s\n",
 283                         pname);
 284         if (dp != NULL && strcmp(dp->d_name, "..") == 0)
 285                 dp = rst_readdir(dirp); /* first real entry */
 286         else
 287                 fprintf(stderr, "Warning: `..' missing from directory %s\n",
 288                         pname);
 289         bpt = rst_telldir(dirp);
 290         /*
 291          * a zero inode signals end of directory
 292          */
 293         while (dp != NULL) {
 294                 locname[namelen] = '\0';
 295                 if (namelen + dp->d_namlen >= sizeof(locname)) {
 296                         fprintf(stderr, "%s%s: name exceeds %ld char\n",
 297                                 locname, dp->d_name, (long)sizeof(locname) - 1);
 298                 } else {
 299                         (void) strncat(locname, dp->d_name, (int)dp->d_namlen);
 300                         treescan(locname, dp->d_ino, todo);
 301                         rst_seekdir(dirp, bpt, itp->t_seekpt);
 302                 }
 303                 dp = rst_readdir(dirp);
 304                 bpt = rst_telldir(dirp);
 305         }
 306 }
 307
 308 /*
 309  * Lookup a pathname which is always assumed to start from the ROOTINO.
 310  */
 311 struct direct *
 312 pathsearch(const char *pathname)
 313 {
 314         dump_ino_t ino;
 315         struct direct *dp;
 316         char *path, *name, buffer[MAXPATHLEN];
 317
 318         strcpy(buffer, pathname);
 319         path = buffer;
 320         ino = ROOTINO;
 321         while (*path == '/')
 322                 path++;
 323         dp = NULL;
 324         while ((name = strsep(&path, "/")) != NULL && *name /* != NULL */) {
 325                 if ((dp = searchdir(ino, name)) == NULL)
 326                         return (NULL);
 327                 ino = dp->d_ino;
 328         }
 329         return (dp);
 330 }
 331
 332 /*
 333  * Lookup the requested name in directory inum.
 334  * Return its inode number if found, zero if it does not exist.
 335  */
 336 static struct direct *
 337 searchdir(dump_ino_t inum, char *name)
 338 {
 339         register struct direct *dp;
 340         register struct inotab *itp;
 341         int len;
 342
 343         itp = inotablookup(inum);
 344         if (itp == NULL)
 345                 return (NULL);
 346         rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 347         len = strlen(name);
 348         do {
 349                 dp = rst_readdir(dirp);
 350                 if (dp == NULL)
 351                         return (NULL);
 352         } while (dp->d_namlen != len || strncmp(dp->d_name, name, len) != 0);
 353         return (dp);
 354 }
 355
 356 /*
 357  * Put the directory entries in the directory file
 358  */
 359 static void
 360 putdir(char *buf, size_t size)
 361 {
 362         struct direct cvtbuf;
 363         register struct odirect *odp;
 364         struct odirect *eodp;
 365         register struct direct *dp;
 366         long loc, i;
 367
 368         if (cvtflag) {
 369                 eodp = (struct odirect *)&buf[size];
 370                 for (odp = (struct odirect *)buf; odp < eodp; odp++)
 371                         if (odp->d_ino != 0) {
 372                                 dcvt(odp, &cvtbuf);
 373                                 putent(&cvtbuf);
 374                         }
 375         } else {
 376                 for (loc = 0; loc < size; ) {
 377                         dp = (struct direct *)(buf + loc);
 378 #ifdef  DIRDEBUG
 379                         printf ("reclen = %d, namlen = %d, type = %d\n",
 380                                 dp->d_reclen, dp->d_namlen, dp->d_type);
 381 #endif
 382                         if (Bcvt)
 383                                 swabst((u_char *)"is", (u_char *) dp);
 384                         if (oldinofmt && dp->d_ino != 0) {
 385 #                               if BYTE_ORDER == BIG_ENDIAN
 386                                         if (Bcvt)
 387                                                 dp->d_namlen = dp->d_type;
 388 #                               else
 389                                         if (!Bcvt)
 390                                                 dp->d_namlen = dp->d_type;
 391 #                               endif
 392                                 dp->d_type = DT_UNKNOWN;
 393                         }
 394 #ifdef  DIRDEBUG
 395                         printf ("reclen = %d, namlen = %d, type = %d\n",
 396                                 dp->d_reclen, dp->d_namlen, dp->d_type);
 397 #endif
 398                         i = DIRBLKSIZ - (loc & (DIRBLKSIZ - 1));
 399                         if ((dp->d_reclen & 0x3) != 0 ||
 400                             dp->d_reclen > i ||
 401                             dp->d_reclen < DIRSIZ(0, dp) ||
 402                             dp->d_namlen > MAXNAMLEN) {
 403                                 Vprintf(stdout, "Mangled directory: ");
 404                                 if ((dp->d_reclen & 0x3) != 0)
 405                                         Vprintf(stdout,
 406                                            "reclen not multiple of 4 ");
 407                                 if (dp->d_reclen < DIRSIZ(0, dp))
 408                                         Vprintf(stdout,
 409                                            "reclen less than DIRSIZ (%d < %d) ",
 410                                            dp->d_reclen, DIRSIZ(0, dp));
 411                                 if (dp->d_namlen > MAXNAMLEN)
 412                                         Vprintf(stdout,
 413                                            "reclen name too big (%d > %d) ",
 414                                            dp->d_namlen, MAXNAMLEN);
 415                                 Vprintf(stdout, "\n");
 416                                 loc += i;
 417                                 continue;
 418                         }
 419                         loc += dp->d_reclen;
 420                         if (dp->d_ino != 0) {
 421                                 putent(dp);
 422                         }
 423                 }
 424         }
 425 }
 426
 427 /*
 428  * These variables are "local" to the following two functions.
 429  */
 430 char dirbuf[DIRBLKSIZ];
 431 long dirloc = 0;
 432 long prev = 0;
 433
 434 /*
 435  * add a new directory entry to a file.
 436  */
 437 static void
 438 putent(struct direct *dp)
 439 {
 440         dp->d_reclen = DIRSIZ(0, dp);
 441         if (dirloc + dp->d_reclen > DIRBLKSIZ) {
 442                 ((struct direct *)(dirbuf + prev))->d_reclen =
 443                     DIRBLKSIZ - prev;
 444                 if ( fwrite(dirbuf, 1, DIRBLKSIZ, df) != DIRBLKSIZ )
 445                         err(1,"cannot write to file %s", dirfile);
 446                 dirloc = 0;
 447         }
 448         memmove(dirbuf + dirloc, dp, (size_t)dp->d_reclen);
 449         prev = dirloc;
 450         dirloc += dp->d_reclen;
 451 }
 452
 453 /*
 454  * flush out a directory that is finished.
 455  */
 456 static void
 457 flushent(void)
 458 {
 459         ((struct direct *)(dirbuf + prev))->d_reclen = DIRBLKSIZ - prev;
 460         if ( fwrite(dirbuf, (int)dirloc, 1, df) != 1 )
 461                 err(1, "cannot write to file %s", dirfile);
 462         seekpt = ftell(df);
 463         if (seekpt == -1)
 464                 err(1, "cannot write to file %s", dirfile);
 465         dirloc = 0;
 466 }
 467
 468 static void
 469 dcvt(struct odirect *odp, struct direct *ndp)
 470 {
 471
 472         memset(ndp, 0, (size_t)(sizeof *ndp));
 473         ndp->d_ino =  odp->d_ino;
 474         ndp->d_type = DT_UNKNOWN;
 475         (void) strncpy(ndp->d_name, odp->d_name, ODIRSIZ);
 476         ndp->d_namlen = strlen(ndp->d_name);
 477         ndp->d_reclen = DIRSIZ(0, ndp);
 478 }
 479
 480 /*
 481  * Seek to an entry in a directory.
 482  * Only values returned by rst_telldir should be passed to rst_seekdir.
 483  * This routine handles many directories in a single file.
 484  * It takes the base of the directory in the file, plus
 485  * the desired seek offset into it.
 486  */
 487 static void
 488 rst_seekdir(RST_DIR *dirp, long loc, long base)
 489 {
 490
 491         if (loc == rst_telldir(dirp))
 492                 return;
 493         loc -= base;
 494         if (loc < 0)
 495                 fprintf(stderr, "bad seek pointer to rst_seekdir %ld\n", loc);
 496         (void) lseek(dirp->dd_fd, base + (loc & ~(DIRBLKSIZ - 1)), SEEK_SET);
 497         dirp->dd_loc = loc & (DIRBLKSIZ - 1);
 498         if (dirp->dd_loc != 0)
 499                 dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ);
 500 }
 501
 502 /*
 503  * get next entry in a directory.
 504  */
 505 struct direct *
 506 rst_readdir(RST_DIR *dirp)
 507 {
 508         register struct direct *dp;
 509
 510         for (;;) {
 511                 if (dirp->dd_loc == 0) {
 512                         dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf,
 513                             DIRBLKSIZ);
 514                         if (dirp->dd_size <= 0) {
 515                                 Dprintf(stderr, "error reading directory\n");
 516                                 return (NULL);
 517                         }
 518                 }
 519                 if (dirp->dd_loc >= dirp->dd_size) {
 520                         dirp->dd_loc = 0;
 521                         continue;
 522                 }
 523                 dp = (struct direct *)(dirp->dd_buf + dirp->dd_loc);
 524                 if (dp->d_reclen == 0 ||
 525                     dp->d_reclen > DIRBLKSIZ + 1 - dirp->dd_loc) {
 526                         Dprintf(stderr, "corrupted directory: bad reclen %d\n",
 527                                 dp->d_reclen);
 528                         return (NULL);
 529                 }
 530                 dirp->dd_loc += dp->d_reclen;
 531                 if (dp->d_ino == 0 && strcmp(dp->d_name, "/") == 0)
 532                         return (NULL);
 533                 if (dp->d_ino >= maxino) {
 534                         Dprintf(stderr, "corrupted directory: bad inum %d\n",
 535                                 dp->d_ino);
 536                         continue;
 537                 }
 538                 return (dp);
 539         }
 540 }
 541
 542 /*
 543  * Simulate the opening of a directory
 544  */
 545 RST_DIR *
 546 rst_opendir(const char *name)
 547 {
 548         struct inotab *itp;
 549         RST_DIR *dirp;
 550         dump_ino_t ino;
 551
 552         if ((ino = dirlookup(name)) > 0 &&
 553             (itp = inotablookup(ino)) != NULL) {
 554                 dirp = opendirfile(dirfile);
 555                 rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 556                 return (dirp);
 557         }
 558         return (NULL);
 559 }
 560
 561 /*
 562  * In our case, there is nothing to do when closing a directory.
 563  */
 564 void
 565 rst_closedir(RST_DIR *dirp)
 566 {
 567
 568         (void)close(dirp->dd_fd);
 569         free(dirp);
 570         return;
 571 }
 572
 573 /*
 574  * Simulate finding the current offset in the directory.
 575  */
 576 static long
 577 rst_telldir(RST_DIR *dirp)
 578 {
 579         return ((long)lseek(dirp->dd_fd,
 580             (off_t)0, SEEK_CUR) - dirp->dd_size + dirp->dd_loc);
 581 }
 582
 583 /*
 584  * Open a directory file.
 585  */
 586 static RST_DIR *
 587 opendirfile(const char *name)
 588 {
 589         register RST_DIR *dirp;
 590         register int fd;
 591
 592         if ((fd = open(name, O_RDONLY)) == -1)
 593                 return (NULL);
 594         if ((dirp = malloc(sizeof(RST_DIR))) == NULL) {
 595                 (void)close(fd);
 596                 return (NULL);
 597         }
 598         dirp->dd_fd = fd;
 599         dirp->dd_loc = 0;
 600         return (dirp);
 601 }
 602
 603 /*
 604  * Set the mode, owner, and times for all new or changed directories
 605  */
 606 void
 607 setdirmodes(int flags)
 608 {
 609         FILE *mf;
 610         struct modeinfo node;
 611         struct entry *ep;
 612         char *cp;
 613
 614         Vprintf(stdout, "Set directory mode, owner, and times.\n");
 615         if (command == 'r' || command == 'R')
 616                 (void) snprintf(modefile, sizeof(modefile), "%s/rstmode%lu", tmpdir, (long)dumpdate);
 617         if (modefile[0] == '#') {
 618                 panic("modefile not defined\n");
 619                 fprintf(stderr, "directory mode, owner, and times not set\n");
 620                 return;
 621         }
 622         mf = fopen(modefile, "r");
 623         if (mf == NULL) {
 624                 warn("fopen");
 625                 fprintf(stderr, "cannot open mode file %s\n", modefile);
 626                 fprintf(stderr, "directory mode, owner, and times not set\n");
 627                 return;
 628         }
 629         clearerr(mf);
 630         for (;;) {
 631                 (void) fread((char *)&node, 1, sizeof(struct modeinfo), mf);
 632                 if (feof(mf))
 633                         break;
 634                 ep = lookupino(node.ino);
 635                 if (command == 'i' || command == 'x') {
 636                         if (ep == NULL)
 637                                 continue;
 638                         if ((flags & FORCE) == 0 && ep->e_flags & EXISTED) {
 639                                 ep->e_flags &= ~NEW;
 640                                 continue;
 641                         }
 642                         if (node.ino == ROOTINO &&
 643                             reply("set owner/mode for '.'") == FAIL)
 644                                 continue;
 645                 }
 646                 if (ep == NULL) {
 647                         panic("cannot find directory inode %d\n", node.ino);
 648                 } else {
 649                         cp = myname(ep);
 650                         (void) chown(cp, node.uid, node.gid);
 651                         (void) chmod(cp, node.mode);
 652                         if (node.flags)
 653 #ifdef  __linux__
 654                                 (void) fsetflags(cp, node.flags);
 655 #else
 656                                 (void) chflags(cp, node.flags);
 657 #endif
 658                         utimes(cp, node.timep);
 659                         ep->e_flags &= ~NEW;
 660                 }
 661         }
 662         if (ferror(mf))
 663                 panic("error setting directory modes\n");
 664         (void) fclose(mf);
 665 }
 666
 667 /*
 668  * Generate a literal copy of a directory.
 669  */
 670 int
 671 genliteraldir(char *name, dump_ino_t ino)
 672 {
 673         register struct inotab *itp;
 674         int ofile, dp, i, size;
 675         char buf[BUFSIZ];
 676
 677         itp = inotablookup(ino);
 678         if (itp == NULL)
 679                 panic("Cannot find directory inode %d named %s\n", ino, name);
 680         if ((ofile = open(name, O_WRONLY | O_CREAT | O_TRUNC, 0666)) < 0) {
 681                 warn("%s: cannot create file\n", name);
 682                 return (FAIL);
 683         }
 684         rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 685         dp = dup(dirp->dd_fd);
 686         for (i = itp->t_size; i > 0; i -= BUFSIZ) {
 687                 size = i < BUFSIZ ? i : BUFSIZ;
 688                 if (read(dp, buf, (int) size) == -1) {
 689                         warnx("write error extracting inode %lu, name %s\n",
 690                                 (unsigned long)curfile.ino, curfile.name);
 691                         err(1, "read");
 692                 }
 693                 if (!Nflag && write(ofile, buf, (int) size) == -1) {
 694                         warnx("write error extracting inode %lu, name %s\n",
 695                                 (unsigned long)curfile.ino, curfile.name);
 696                         err(1, "write");
 697                 }
 698         }
 699         (void) close(dp);
 700         (void) close(ofile);
 701         return (GOOD);
 702 }
 703
 704 /*
 705  * Determine the type of an inode
 706  */
 707 int
 708 inodetype(dump_ino_t ino)
 709 {
 710         struct inotab *itp;
 711
 712         itp = inotablookup(ino);
 713         if (itp == NULL)
 714                 return (LEAF);
 715         return (NODE);
 716 }
 717
 718 /*
 719  * Allocate and initialize a directory inode entry.
 720  * If requested, save its pertinent mode, owner, and time info.
 721  */
 722 static struct inotab *
 723 #ifdef  __linux__
 724 allocinotab(dump_ino_t ino, struct new_bsd_inode *dip, long seekpt)
 725 #else
 726 allocinotab(dump_ino_t ino, struct dinode *dip, long seekpt)
 727 #endif
 728 {
 729         register struct inotab  *itp;
 730         struct modeinfo node;
 731
 732         itp = calloc(1, sizeof(struct inotab));
 733         if (itp == NULL)
 734                 panic("no memory directory table\n");
 735         itp->t_next = inotab[INOHASH(ino)];
 736         inotab[INOHASH(ino)] = itp;
 737         itp->t_ino = ino;
 738         itp->t_seekpt = seekpt;
 739         if (mf == NULL)
 740                 return (itp);
 741         node.ino = ino;
 742 #ifdef  __linux__
 743         node.timep[0].tv_sec = dip->di_atime.tv_sec;
 744         node.timep[0].tv_usec = dip->di_atime.tv_usec;
 745         node.timep[1].tv_sec = dip->di_mtime.tv_sec;
 746         node.timep[1].tv_usec = dip->di_mtime.tv_usec;
 747 #else   /* __linux__ */
 748         node.timep[0].tv_sec = dip->di_atime;
 749         node.timep[0].tv_usec = dip->di_atimensec / 1000;
 750         node.timep[1].tv_sec = dip->di_mtime;
 751         node.timep[1].tv_usec = dip->di_mtimensec / 1000;
 752 #endif  /* __linux__ */
 753         node.mode = dip->di_mode;
 754         node.flags = dip->di_flags;
 755         node.uid = dip->di_uid;
 756         node.gid = dip->di_gid;
 757         if ( fwrite((char *)&node, 1, sizeof(struct modeinfo), mf) != sizeof(struct modeinfo) )
 758                 err(1,"cannot write to file %s", modefile);
 759         return (itp);
 760 }
 761
 762 /*
 763  * Look up an inode in the table of directories
 764  */
 765 static struct inotab *
 766 inotablookup(dump_ino_t ino)
 767 {
 768         register struct inotab *itp;
 769
 770         for (itp = inotab[INOHASH(ino)]; itp != NULL; itp = itp->t_next)
 771                 if (itp->t_ino == ino)
 772                         return (itp);
 773         return (NULL);
 774 }
 775
 776 /*
 777  * Clean up and exit
 778  */
 779 void
 780 cleanup(void)
 781 {
 782         closemt();
 783         if (modefile[0] != '#')
 784                 (void) unlink(modefile);
 785         if (dirfile[0] != '#')
 786                 (void) unlink(dirfile);
 787 }