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 1.12 2000/12/05 15:43:49 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                         if ( fclose(df) == EOF )
 212                                 err(1, "cannot write to file %s", dirfile);
 213                         dirp = opendirfile(dirfile);
 214                         if (dirp == NULL)
 215                                 warn("opendirfile");
 216                         if (mf != NULL && fclose(mf) == EOF )
 217                                 err(1, "cannot write to file %s", dirfile);
 218                         i = dirlookup(dot);
 219                         if (i == 0)
 220                                 panic("Root directory is not on tape\n");
 221                         return;
 222                 }
 223                 itp = allocinotab(curfile.ino, ip, seekpt);
 224                 getfile(putdir, xtrnull);
 225                 putent(&nulldir);
 226                 flushent();
 227                 itp->t_size = seekpt - itp->t_seekpt;
 228         }
 229 }
 230
 231 /*
 232  * skip over all the directories on the tape
 233  */
 234 void
 235 skipdirs(void)
 236 {
 237
 238         while (curfile.dip && (curfile.dip->di_mode & IFMT) == IFDIR) {
 239                 skipfile();
 240         }
 241 }
 242
 243 /*
 244  *      Recursively find names and inumbers of all files in subtree
 245  *      pname and pass them off to be processed.
 246  */
 247 void
 248 treescan(char *pname, ino_t ino, long (*todo) __P((char *, ino_t, int)))
 249 {
 250         register struct inotab *itp;
 251         register struct direct *dp;
 252         int namelen;
 253         long bpt;
 254         char locname[MAXPATHLEN + 1];
 255
 256         itp = inotablookup(ino);
 257         if (itp == NULL) {
 258                 /*
 259                  * Pname is name of a simple file or an unchanged directory.
 260                  */
 261                 (void) (*todo)(pname, ino, LEAF);
 262                 return;
 263         }
 264         /*
 265          * Pname is a dumped directory name.
 266          */
 267         if ((*todo)(pname, ino, NODE) == FAIL)
 268                 return;
 269         /*
 270          * begin search through the directory
 271          * skipping over "." and ".."
 272          */
 273         namelen = snprintf(locname, sizeof(locname), "%s/", pname);
 274         if (namelen >= sizeof(locname))
 275                 namelen = sizeof(locname) - 1;
 276         rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 277         dp = rst_readdir(dirp); /* "." */
 278         if (dp != NULL && strcmp(dp->d_name, ".") == 0)
 279                 dp = rst_readdir(dirp); /* ".." */
 280         else
 281                 fprintf(stderr, "Warning: `.' missing from directory %s\n",
 282                         pname);
 283         if (dp != NULL && strcmp(dp->d_name, "..") == 0)
 284                 dp = rst_readdir(dirp); /* first real entry */
 285         else
 286                 fprintf(stderr, "Warning: `..' missing from directory %s\n",
 287                         pname);
 288         bpt = rst_telldir(dirp);
 289         /*
 290          * a zero inode signals end of directory
 291          */
 292         while (dp != NULL) {
 293                 locname[namelen] = '\0';
 294                 if (namelen + dp->d_namlen >= sizeof(locname)) {
 295                         fprintf(stderr, "%s%s: name exceeds %ld char\n",
 296                                 locname, dp->d_name, (long)sizeof(locname) - 1);
 297                 } else {
 298                         (void) strncat(locname, dp->d_name, (int)dp->d_namlen);
 299                         treescan(locname, dp->d_ino, todo);
 300                         rst_seekdir(dirp, bpt, itp->t_seekpt);
 301                 }
 302                 dp = rst_readdir(dirp);
 303                 bpt = rst_telldir(dirp);
 304         }
 305 }
 306
 307 /*
 308  * Lookup a pathname which is always assumed to start from the ROOTINO.
 309  */
 310 struct direct *
 311 pathsearch(const char *pathname)
 312 {
 313         ino_t ino;
 314         struct direct *dp;
 315         char *path, *name, buffer[MAXPATHLEN];
 316
 317         strcpy(buffer, pathname);
 318         path = buffer;
 319         ino = ROOTINO;
 320         while (*path == '/')
 321                 path++;
 322         dp = NULL;
 323         while ((name = strsep(&path, "/")) != NULL && *name /* != NULL */) {
 324                 if ((dp = searchdir(ino, name)) == NULL)
 325                         return (NULL);
 326                 ino = dp->d_ino;
 327         }
 328         return (dp);
 329 }
 330
 331 /*
 332  * Lookup the requested name in directory inum.
 333  * Return its inode number if found, zero if it does not exist.
 334  */
 335 static struct direct *
 336 searchdir(ino_t inum, char *name)
 337 {
 338         register struct direct *dp;
 339         register struct inotab *itp;
 340         int len;
 341
 342         itp = inotablookup(inum);
 343         if (itp == NULL)
 344                 return (NULL);
 345         rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 346         len = strlen(name);
 347         do {
 348                 dp = rst_readdir(dirp);
 349                 if (dp == NULL)
 350                         return (NULL);
 351         } while (dp->d_namlen != len || strncmp(dp->d_name, name, len) != 0);
 352         return (dp);
 353 }
 354
 355 /*
 356  * Put the directory entries in the directory file
 357  */
 358 static void
 359 putdir(char *buf, size_t size)
 360 {
 361         struct direct cvtbuf;
 362         register struct odirect *odp;
 363         struct odirect *eodp;
 364         register struct direct *dp;
 365         long loc, i;
 366
 367         if (cvtflag) {
 368                 eodp = (struct odirect *)&buf[size];
 369                 for (odp = (struct odirect *)buf; odp < eodp; odp++)
 370                         if (odp->d_ino != 0) {
 371                                 dcvt(odp, &cvtbuf);
 372                                 putent(&cvtbuf);
 373                         }
 374         } else {
 375                 for (loc = 0; loc < size; ) {
 376                         dp = (struct direct *)(buf + loc);
 377 #ifdef  DIRDEBUG
 378                         printf ("reclen = %d, namlen = %d, type = %d\n",
 379                                 dp->d_reclen, dp->d_namlen, dp->d_type);
 380 #endif
 381                         if (Bcvt)
 382                                 swabst((u_char *)"is", (u_char *) dp);
 383                         if (oldinofmt && dp->d_ino != 0) {
 384 #                               if BYTE_ORDER == BIG_ENDIAN
 385                                         if (Bcvt)
 386                                                 dp->d_namlen = dp->d_type;
 387 #                               else
 388                                         if (!Bcvt)
 389                                                 dp->d_namlen = dp->d_type;
 390 #                               endif
 391                                 dp->d_type = DT_UNKNOWN;
 392                         }
 393 #ifdef  DIRDEBUG
 394                         printf ("reclen = %d, namlen = %d, type = %d\n",
 395                                 dp->d_reclen, dp->d_namlen, dp->d_type);
 396 #endif
 397                         i = DIRBLKSIZ - (loc & (DIRBLKSIZ - 1));
 398                         if ((dp->d_reclen & 0x3) != 0 ||
 399                             dp->d_reclen > i ||
 400                             dp->d_reclen < DIRSIZ(0, dp) ||
 401                             dp->d_namlen > MAXNAMLEN) {
 402                                 Vprintf(stdout, "Mangled directory: ");
 403                                 if ((dp->d_reclen & 0x3) != 0)
 404                                         Vprintf(stdout,
 405                                            "reclen not multiple of 4 ");
 406                                 if (dp->d_reclen < DIRSIZ(0, dp))
 407                                         Vprintf(stdout,
 408                                            "reclen less than DIRSIZ (%d < %d) ",
 409                                            dp->d_reclen, DIRSIZ(0, dp));
 410                                 if (dp->d_namlen > MAXNAMLEN)
 411                                         Vprintf(stdout,
 412                                            "reclen name too big (%d > %d) ",
 413                                            dp->d_namlen, MAXNAMLEN);
 414                                 Vprintf(stdout, "\n");
 415                                 loc += i;
 416                                 continue;
 417                         }
 418                         loc += dp->d_reclen;
 419                         if (dp->d_ino != 0) {
 420                                 putent(dp);
 421                         }
 422                 }
 423         }
 424 }
 425
 426 /*
 427  * These variables are "local" to the following two functions.
 428  */
 429 char dirbuf[DIRBLKSIZ];
 430 long dirloc = 0;
 431 long prev = 0;
 432
 433 /*
 434  * add a new directory entry to a file.
 435  */
 436 static void
 437 putent(struct direct *dp)
 438 {
 439         dp->d_reclen = DIRSIZ(0, dp);
 440         if (dirloc + dp->d_reclen > DIRBLKSIZ) {
 441                 ((struct direct *)(dirbuf + prev))->d_reclen =
 442                     DIRBLKSIZ - prev;
 443                 if ( fwrite(dirbuf, 1, DIRBLKSIZ, df) != DIRBLKSIZ )
 444                         err(1,"cannot write to file %s", dirfile);
 445                 dirloc = 0;
 446         }
 447         memmove(dirbuf + dirloc, dp, (size_t)dp->d_reclen);
 448         prev = dirloc;
 449         dirloc += dp->d_reclen;
 450 }
 451
 452 /*
 453  * flush out a directory that is finished.
 454  */
 455 static void
 456 flushent(void)
 457 {
 458         ((struct direct *)(dirbuf + prev))->d_reclen = DIRBLKSIZ - prev;
 459         if ( fwrite(dirbuf, (int)dirloc, 1, df) != 1 )
 460                 err(1, "cannot write to file %s", dirfile);
 461         seekpt = ftell(df);
 462         if (seekpt == -1)
 463                 err(1, "cannot write to file %s", dirfile);
 464         dirloc = 0;
 465 }
 466
 467 static void
 468 dcvt(struct odirect *odp, struct direct *ndp)
 469 {
 470
 471         memset(ndp, 0, (size_t)(sizeof *ndp));
 472         ndp->d_ino =  odp->d_ino;
 473         ndp->d_type = DT_UNKNOWN;
 474         (void) strncpy(ndp->d_name, odp->d_name, ODIRSIZ);
 475         ndp->d_namlen = strlen(ndp->d_name);
 476         ndp->d_reclen = DIRSIZ(0, ndp);
 477 }
 478
 479 /*
 480  * Seek to an entry in a directory.
 481  * Only values returned by rst_telldir should be passed to rst_seekdir.
 482  * This routine handles many directories in a single file.
 483  * It takes the base of the directory in the file, plus
 484  * the desired seek offset into it.
 485  */
 486 static void
 487 rst_seekdir(RST_DIR *dirp, long loc, long base)
 488 {
 489
 490         if (loc == rst_telldir(dirp))
 491                 return;
 492         loc -= base;
 493         if (loc < 0)
 494                 fprintf(stderr, "bad seek pointer to rst_seekdir %ld\n", loc);
 495         (void) lseek(dirp->dd_fd, base + (loc & ~(DIRBLKSIZ - 1)), SEEK_SET);
 496         dirp->dd_loc = loc & (DIRBLKSIZ - 1);
 497         if (dirp->dd_loc != 0)
 498                 dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ);
 499 }
 500
 501 /*
 502  * get next entry in a directory.
 503  */
 504 struct direct *
 505 rst_readdir(RST_DIR *dirp)
 506 {
 507         register struct direct *dp;
 508
 509         for (;;) {
 510                 if (dirp->dd_loc == 0) {
 511                         dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf,
 512                             DIRBLKSIZ);
 513                         if (dirp->dd_size <= 0) {
 514                                 Dprintf(stderr, "error reading directory\n");
 515                                 return (NULL);
 516                         }
 517                 }
 518                 if (dirp->dd_loc >= dirp->dd_size) {
 519                         dirp->dd_loc = 0;
 520                         continue;
 521                 }
 522                 dp = (struct direct *)(dirp->dd_buf + dirp->dd_loc);
 523                 if (dp->d_reclen == 0 ||
 524                     dp->d_reclen > DIRBLKSIZ + 1 - dirp->dd_loc) {
 525                         Dprintf(stderr, "corrupted directory: bad reclen %d\n",
 526                                 dp->d_reclen);
 527                         return (NULL);
 528                 }
 529                 dirp->dd_loc += dp->d_reclen;
 530                 if (dp->d_ino == 0 && strcmp(dp->d_name, "/") == 0)
 531                         return (NULL);
 532                 if (dp->d_ino >= maxino) {
 533                         Dprintf(stderr, "corrupted directory: bad inum %d\n",
 534                                 dp->d_ino);
 535                         continue;
 536                 }
 537                 return (dp);
 538         }
 539 }
 540
 541 /*
 542  * Simulate the opening of a directory
 543  */
 544 RST_DIR *
 545 rst_opendir(const char *name)
 546 {
 547         struct inotab *itp;
 548         RST_DIR *dirp;
 549         ino_t ino;
 550
 551         if ((ino = dirlookup(name)) > 0 &&
 552             (itp = inotablookup(ino)) != NULL) {
 553                 dirp = opendirfile(dirfile);
 554                 rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 555                 return (dirp);
 556         }
 557         return (NULL);
 558 }
 559
 560 /*
 561  * In our case, there is nothing to do when closing a directory.
 562  */
 563 void
 564 rst_closedir(RST_DIR *dirp)
 565 {
 566
 567         (void)close(dirp->dd_fd);
 568         free(dirp);
 569         return;
 570 }
 571
 572 /*
 573  * Simulate finding the current offset in the directory.
 574  */
 575 static long
 576 rst_telldir(RST_DIR *dirp)
 577 {
 578         return ((long)lseek(dirp->dd_fd,
 579             (off_t)0, SEEK_CUR) - dirp->dd_size + dirp->dd_loc);
 580 }
 581
 582 /*
 583  * Open a directory file.
 584  */
 585 static RST_DIR *
 586 opendirfile(const char *name)
 587 {
 588         register RST_DIR *dirp;
 589         register int fd;
 590
 591         if ((fd = open(name, O_RDONLY)) == -1)
 592                 return (NULL);
 593         if ((dirp = malloc(sizeof(RST_DIR))) == NULL) {
 594                 (void)close(fd);
 595                 return (NULL);
 596         }
 597         dirp->dd_fd = fd;
 598         dirp->dd_loc = 0;
 599         return (dirp);
 600 }
 601
 602 /*
 603  * Set the mode, owner, and times for all new or changed directories
 604  */
 605 void
 606 setdirmodes(int flags)
 607 {
 608         FILE *mf;
 609         struct modeinfo node;
 610         struct entry *ep;
 611         char *cp;
 612
 613         Vprintf(stdout, "Set directory mode, owner, and times.\n");
 614         if (command == 'r' || command == 'R')
 615                 (void) snprintf(modefile, sizeof(modefile), "%s/rstmode%lu", tmpdir, (long)dumpdate);
 616         if (modefile[0] == '#') {
 617                 panic("modefile not defined\n");
 618                 fprintf(stderr, "directory mode, owner, and times not set\n");
 619                 return;
 620         }
 621         mf = fopen(modefile, "r");
 622         if (mf == NULL) {
 623                 warn("fopen");
 624                 fprintf(stderr, "cannot open mode file %s\n", modefile);
 625                 fprintf(stderr, "directory mode, owner, and times not set\n");
 626                 return;
 627         }
 628         clearerr(mf);
 629         for (;;) {
 630                 (void) fread((char *)&node, 1, sizeof(struct modeinfo), mf);
 631                 if (feof(mf))
 632                         break;
 633                 ep = lookupino(node.ino);
 634                 if (command == 'i' || command == 'x') {
 635                         if (ep == NULL)
 636                                 continue;
 637                         if ((flags & FORCE) == 0 && ep->e_flags & EXISTED) {
 638                                 ep->e_flags &= ~NEW;
 639                                 continue;
 640                         }
 641                         if (node.ino == ROOTINO &&
 642                             reply("set owner/mode for '.'") == FAIL)
 643                                 continue;
 644                 }
 645                 if (ep == NULL) {
 646                         panic("cannot find directory inode %d\n", node.ino);
 647                 } else {
 648                         cp = myname(ep);
 649                         (void) chown(cp, node.uid, node.gid);
 650                         (void) chmod(cp, node.mode);
 651                         if (node.flags)
 652 #ifdef  __linux__
 653                                 (void) fsetflags(cp, node.flags);
 654 #else
 655                                 (void) chflags(cp, node.flags);
 656 #endif
 657                         utimes(cp, node.timep);
 658                         ep->e_flags &= ~NEW;
 659                 }
 660         }
 661         if (ferror(mf))
 662                 panic("error setting directory modes\n");
 663         (void) fclose(mf);
 664 }
 665
 666 /*
 667  * Generate a literal copy of a directory.
 668  */
 669 int
 670 genliteraldir(char *name, ino_t ino)
 671 {
 672         register struct inotab *itp;
 673         int ofile, dp, i, size;
 674         char buf[BUFSIZ];
 675
 676         itp = inotablookup(ino);
 677         if (itp == NULL)
 678                 panic("Cannot find directory inode %d named %s\n", ino, name);
 679         if ((ofile = open(name, O_WRONLY | O_CREAT | O_TRUNC, 0666)) < 0) {
 680                 warn("%s: cannot create file\n", name);
 681                 return (FAIL);
 682         }
 683         rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 684         dp = dup(dirp->dd_fd);
 685         for (i = itp->t_size; i > 0; i -= BUFSIZ) {
 686                 size = i < BUFSIZ ? i : BUFSIZ;
 687                 if (read(dp, buf, (int) size) == -1) {
 688                         warnx("write error extracting inode %lu, name %s\n",
 689                                 (unsigned long)curfile.ino, curfile.name);
 690                         err(1, "read");
 691                 }
 692                 if (!Nflag && write(ofile, buf, (int) size) == -1) {
 693                         warnx("write error extracting inode %lu, name %s\n",
 694                                 (unsigned long)curfile.ino, curfile.name);
 695                         err(1, "write");
 696                 }
 697         }
 698         (void) close(dp);
 699         (void) close(ofile);
 700         return (GOOD);
 701 }
 702
 703 /*
 704  * Determine the type of an inode
 705  */
 706 int
 707 inodetype(ino_t ino)
 708 {
 709         struct inotab *itp;
 710
 711         itp = inotablookup(ino);
 712         if (itp == NULL)
 713                 return (LEAF);
 714         return (NODE);
 715 }
 716
 717 /*
 718  * Allocate and initialize a directory inode entry.
 719  * If requested, save its pertinent mode, owner, and time info.
 720  */
 721 static struct inotab *
 722 #ifdef  __linux__
 723 allocinotab(ino_t ino, struct new_bsd_inode *dip, long seekpt)
 724 #else
 725 allocinotab(ino_t ino, struct dinode *dip, long seekpt)
 726 #endif
 727 {
 728         register struct inotab  *itp;
 729         struct modeinfo node;
 730
 731         itp = calloc(1, sizeof(struct inotab));
 732         if (itp == NULL)
 733                 panic("no memory directory table\n");
 734         itp->t_next = inotab[INOHASH(ino)];
 735         inotab[INOHASH(ino)] = itp;
 736         itp->t_ino = ino;
 737         itp->t_seekpt = seekpt;
 738         if (mf == NULL)
 739                 return (itp);
 740         node.ino = ino;
 741 #ifdef  __linux__
 742         node.timep[0].tv_sec = dip->di_atime.tv_sec;
 743         node.timep[0].tv_usec = dip->di_atime.tv_usec;
 744         node.timep[1].tv_sec = dip->di_mtime.tv_sec;
 745         node.timep[1].tv_usec = dip->di_mtime.tv_usec;
 746 #else   /* __linux__ */
 747         node.timep[0].tv_sec = dip->di_atime;
 748         node.timep[0].tv_usec = dip->di_atimensec / 1000;
 749         node.timep[1].tv_sec = dip->di_mtime;
 750         node.timep[1].tv_usec = dip->di_mtimensec / 1000;
 751 #endif  /* __linux__ */
 752         node.mode = dip->di_mode;
 753         node.flags = dip->di_flags;
 754         node.uid = dip->di_uid;
 755         node.gid = dip->di_gid;
 756         if ( fwrite((char *)&node, 1, sizeof(struct modeinfo), mf) != sizeof(struct modeinfo) )
 757                 err(1,"cannot write to file %s", modefile);
 758         return (itp);
 759 }
 760
 761 /*
 762  * Look up an inode in the table of directories
 763  */
 764 static struct inotab *
 765 inotablookup(ino_t ino)
 766 {
 767         register struct inotab *itp;
 768
 769         for (itp = inotab[INOHASH(ino)]; itp != NULL; itp = itp->t_next)
 770                 if (itp->t_ino == ino)
 771                         return (itp);
 772         return (NULL);
 773 }
 774
 775 /*
 776  * Clean up and exit
 777  */
 778 void
 779 cleanup(void)
 780 {
 781         closemt();
 782         if (modefile[0] != '#')
 783                 (void) unlink(modefile);
 784         if (dirfile[0] != '#')
 785                 (void) unlink(dirfile);
 786 }