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>, 1999-2000
   6  */
   7
   8 /*
   9  * Copyright (c) 1983, 1993
  10  *      The Regents of the University of California.  All rights reserved.
  11  * (c) UNIX System Laboratories, Inc.
  12  * All or some portions of this file are derived from material licensed
  13  * to the University of California by American Telephone and Telegraph
  14  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
  15  * the permission of UNIX System Laboratories, Inc.
  16  *
  17  * Redistribution and use in source and binary forms, with or without
  18  * modification, are permitted provided that the following conditions
  19  * are met:
  20  * 1. Redistributions of source code must retain the above copyright
  21  *    notice, this list of conditions and the following disclaimer.
  22  * 2. Redistributions in binary form must reproduce the above copyright
  23  *    notice, this list of conditions and the following disclaimer in the
  24  *    documentation and/or other materials provided with the distribution.
  25  * 3. All advertising materials mentioning features or use of this software
  26  *    must display the following acknowledgement:
  27  *      This product includes software developed by the University of
  28  *      California, Berkeley and its contributors.
  29  * 4. Neither the name of the University nor the names of its contributors
  30  *    may be used to endorse or promote products derived from this software
  31  *    without specific prior written permission.
  32  *
  33  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  34  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  35  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  36  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  37  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  38  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  39  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  40  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  41  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  42  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  43  * SUCH DAMAGE.
  44  */
  45
  46 #ifndef lint
  47 static const char rcsid[] =
  48         "$Id: dirs.c,v 1.9 2000/03/01 10:16:05 stelian Exp $";
  49 #endif /* not lint */
  50
  51 #include <sys/param.h>
  52 #include <sys/file.h>
  53 #include <sys/stat.h>
  54
  55 #ifdef  __linux__
  56 #include <linux/ext2_fs.h>
  57 #include <bsdcompat.h>
  58 #else   /* __linux__ */
  59 #include <ufs/ufs/dinode.h>
  60 #include <ufs/ufs/dir.h>
  61 #endif  /* __linux__ */
  62 #include <protocols/dumprestore.h>
  63
  64 #include <compaterr.h>
  65 #include <errno.h>
  66 #include <stdio.h>
  67 #include <stdlib.h>
  68 #include <string.h>
  69 #include <unistd.h>
  70
  71 #ifdef  __linux__
  72 #include <endian.h>
  73 #else
  74 #include <machine/endian.h>
  75 #endif
  76
  77 #include "pathnames.h"
  78 #include "restore.h"
  79 #include "extern.h"
  80
  81 /*
  82  * Symbol table of directories read from tape.
  83  */
  84 #define HASHSIZE        1000
  85 #define INOHASH(val) (val % HASHSIZE)
  86 struct inotab {
  87         struct  inotab *t_next;
  88         ino_t   t_ino;
  89         int32_t t_seekpt;
  90         int32_t t_size;
  91 };
  92 static struct inotab *inotab[HASHSIZE];
  93
  94 /*
  95  * Information retained about directories.
  96  */
  97 struct modeinfo {
  98         ino_t ino;
  99         struct timeval timep[2];
 100         mode_t mode;
 101         uid_t uid;
 102         gid_t gid;
 103         unsigned int flags;
 104 };
 105
 106 /*
 107  * Definitions for library routines operating on directories.
 108  */
 109 #undef DIRBLKSIZ
 110 #define DIRBLKSIZ 1024
 111 struct rstdirdesc {
 112         int     dd_fd;
 113         int32_t dd_loc;
 114         int32_t dd_size;
 115         char    dd_buf[DIRBLKSIZ];
 116 };
 117
 118 /*
 119  * Global variables for this file.
 120  */
 121 static long     seekpt;
 122 static FILE     *df, *mf;
 123 static RST_DIR  *dirp;
 124 static char     dirfile[MAXPATHLEN] = "#";      /* No file */
 125 static char     modefile[MAXPATHLEN] = "#";     /* No file */
 126 static char     dot[2] = ".";                   /* So it can be modified */
 127
 128 /*
 129  * Format of old style directories.
 130  */
 131 #define ODIRSIZ 14
 132 struct odirect {
 133         u_short d_ino;
 134         char    d_name[ODIRSIZ];
 135 };
 136
 137 #ifdef  __linux__
 138 static struct inotab    *allocinotab __P((ino_t, struct new_bsd_inode *, long));
 139 #else
 140 static struct inotab    *allocinotab __P((ino_t, struct dinode *, long));
 141 #endif
 142 static void              dcvt __P((struct odirect *, struct direct *));
 143 static void              flushent __P((void));
 144 static struct inotab    *inotablookup __P((ino_t));
 145 static RST_DIR          *opendirfile __P((const char *));
 146 static void              putdir __P((char *, size_t));
 147 static void              putent __P((struct direct *));
 148 static void              rst_seekdir __P((RST_DIR *, long, long));
 149 static long              rst_telldir __P((RST_DIR *));
 150 static struct direct    *searchdir __P((ino_t, char *));
 151
 152 /*
 153  *      Extract directory contents, building up a directory structure
 154  *      on disk for extraction by name.
 155  *      If genmode is requested, save mode, owner, and times for all
 156  *      directories on the tape.
 157  */
 158 void
 159 extractdirs(int genmode)
 160 {
 161         register int i;
 162 #ifdef  __linux__
 163         register struct new_bsd_inode *ip;
 164 #else
 165         register struct dinode *ip;
 166 #endif
 167         struct inotab *itp;
 168         struct direct nulldir;
 169         int fd;
 170
 171         Vprintf(stdout, "Extract directories from tape\n");
 172         (void) snprintf(dirfile, sizeof(dirfile), "%s/rstdir%ld", tmpdir,
 173                 (long)dumpdate);
 174         if (command != 'r' && command != 'R') {
 175                 (void) strncat(dirfile, "-XXXXXX",
 176                         sizeof(dirfile) - strlen(dirfile));
 177                 fd = mkstemp(dirfile);
 178         } else
 179                 fd = open(dirfile, O_RDWR|O_CREAT|O_EXCL, 0666);
 180         if (fd == -1 || (df = fdopen(fd, "w")) == NULL) {
 181                 if (fd != -1)
 182                         close(fd);
 183                 err(1, "cannot create directory temporary %s", dirfile);
 184         }
 185         if (genmode != 0) {
 186                 (void) snprintf(modefile, sizeof(modefile), "%s/rstmode%ld", tmpdir, (long)dumpdate);
 187                 if (command != 'r' && command != 'R') {
 188                         (void) strncat(modefile, "-XXXXXX",
 189                                 sizeof(modefile) - strlen(modefile));
 190                         fd = mkstemp(modefile);
 191                 } else
 192                         fd = open(modefile, O_RDWR|O_CREAT|O_EXCL, 0666);
 193                 if (fd == -1 || (mf = fdopen(fd, "w")) == NULL) {
 194                         if (fd != -1)
 195                                 close(fd);
 196                         err(1, "cannot create modefile %s", modefile);
 197                 }
 198         }
 199         nulldir.d_ino = 0;
 200         nulldir.d_type = DT_DIR;
 201         nulldir.d_namlen = 1;
 202         nulldir.d_name[0] = '/';
 203         nulldir.d_name[1] = '\0';
 204         nulldir.d_reclen = DIRSIZ(0, &nulldir);
 205         for (;;) {
 206                 curfile.name = "<directory file - name unknown>";
 207                 curfile.action = USING;
 208                 ip = curfile.dip;
 209                 if (ip == NULL || (ip->di_mode & IFMT) != IFDIR) {
 210                         (void) fclose(df);
 211                         dirp = opendirfile(dirfile);
 212                         if (dirp == NULL)
 213                                 warn("opendirfile");
 214                         if (mf != NULL)
 215                                 (void) fclose(mf);
 216                         i = dirlookup(dot);
 217                         if (i == 0)
 218                                 panic("Root directory is not on tape\n");
 219                         return;
 220                 }
 221                 itp = allocinotab(curfile.ino, ip, seekpt);
 222                 getfile(putdir, xtrnull);
 223                 putent(&nulldir);
 224                 flushent();
 225                 itp->t_size = seekpt - itp->t_seekpt;
 226         }
 227 }
 228
 229 /*
 230  * skip over all the directories on the tape
 231  */
 232 void
 233 skipdirs(void)
 234 {
 235
 236         while (curfile.dip && (curfile.dip->di_mode & IFMT) == IFDIR) {
 237                 skipfile();
 238         }
 239 }
 240
 241 /*
 242  *      Recursively find names and inumbers of all files in subtree
 243  *      pname and pass them off to be processed.
 244  */
 245 void
 246 treescan(char *pname, ino_t ino, long (*todo) __P((char *, ino_t, int)))
 247 {
 248         register struct inotab *itp;
 249         register struct direct *dp;
 250         int namelen;
 251         long bpt;
 252         char locname[MAXPATHLEN + 1];
 253
 254         itp = inotablookup(ino);
 255         if (itp == NULL) {
 256                 /*
 257                  * Pname is name of a simple file or an unchanged directory.
 258                  */
 259                 (void) (*todo)(pname, ino, LEAF);
 260                 return;
 261         }
 262         /*
 263          * Pname is a dumped directory name.
 264          */
 265         if ((*todo)(pname, ino, NODE) == FAIL)
 266                 return;
 267         /*
 268          * begin search through the directory
 269          * skipping over "." and ".."
 270          */
 271         namelen = snprintf(locname, sizeof(locname), "%s/", pname);
 272         if (namelen >= sizeof(locname))
 273                 namelen = sizeof(locname) - 1;
 274         rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 275         dp = rst_readdir(dirp); /* "." */
 276         if (dp != NULL && strcmp(dp->d_name, ".") == 0)
 277                 dp = rst_readdir(dirp); /* ".." */
 278         else
 279                 fprintf(stderr, "Warning: `.' missing from directory %s\n",
 280                         pname);
 281         if (dp != NULL && strcmp(dp->d_name, "..") == 0)
 282                 dp = rst_readdir(dirp); /* first real entry */
 283         else
 284                 fprintf(stderr, "Warning: `..' missing from directory %s\n",
 285                         pname);
 286         bpt = rst_telldir(dirp);
 287         /*
 288          * a zero inode signals end of directory
 289          */
 290         while (dp != NULL) {
 291                 locname[namelen] = '\0';
 292                 if (namelen + dp->d_namlen >= sizeof(locname)) {
 293                         fprintf(stderr, "%s%s: name exceeds %ld char\n",
 294                                 locname, dp->d_name, (long)sizeof(locname) - 1);
 295                 } else {
 296                         (void) strncat(locname, dp->d_name, (int)dp->d_namlen);
 297                         treescan(locname, dp->d_ino, todo);
 298                         rst_seekdir(dirp, bpt, itp->t_seekpt);
 299                 }
 300                 dp = rst_readdir(dirp);
 301                 bpt = rst_telldir(dirp);
 302         }
 303 }
 304
 305 /*
 306  * Lookup a pathname which is always assumed to start from the ROOTINO.
 307  */
 308 struct direct *
 309 pathsearch(const char *pathname)
 310 {
 311         ino_t ino;
 312         struct direct *dp;
 313         char *path, *name, buffer[MAXPATHLEN];
 314
 315         strcpy(buffer, pathname);
 316         path = buffer;
 317         ino = ROOTINO;
 318         while (*path == '/')
 319                 path++;
 320         dp = NULL;
 321         while ((name = strsep(&path, "/")) != NULL && *name /* != NULL */) {
 322                 if ((dp = searchdir(ino, name)) == NULL)
 323                         return (NULL);
 324                 ino = dp->d_ino;
 325         }
 326         return (dp);
 327 }
 328
 329 /*
 330  * Lookup the requested name in directory inum.
 331  * Return its inode number if found, zero if it does not exist.
 332  */
 333 static struct direct *
 334 searchdir(ino_t inum, char *name)
 335 {
 336         register struct direct *dp;
 337         register struct inotab *itp;
 338         int len;
 339
 340         itp = inotablookup(inum);
 341         if (itp == NULL)
 342                 return (NULL);
 343         rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 344         len = strlen(name);
 345         do {
 346                 dp = rst_readdir(dirp);
 347                 if (dp == NULL)
 348                         return (NULL);
 349         } while (dp->d_namlen != len || strncmp(dp->d_name, name, len) != 0);
 350         return (dp);
 351 }
 352
 353 /*
 354  * Put the directory entries in the directory file
 355  */
 356 static void
 357 putdir(char *buf, size_t size)
 358 {
 359         struct direct cvtbuf;
 360         register struct odirect *odp;
 361         struct odirect *eodp;
 362         register struct direct *dp;
 363         long loc, i;
 364
 365         if (cvtflag) {
 366                 eodp = (struct odirect *)&buf[size];
 367                 for (odp = (struct odirect *)buf; odp < eodp; odp++)
 368                         if (odp->d_ino != 0) {
 369                                 dcvt(odp, &cvtbuf);
 370                                 putent(&cvtbuf);
 371                         }
 372         } else {
 373                 for (loc = 0; loc < size; ) {
 374                         dp = (struct direct *)(buf + loc);
 375 #ifdef  DIRDEBUG
 376                         printf ("reclen = %d, namlen = %d, type = %d\n",
 377                                 dp->d_reclen, dp->d_namlen, dp->d_type);
 378 #endif
 379                         if (Bcvt)
 380                                 swabst((u_char *)"is", (u_char *) dp);
 381                         if (oldinofmt && dp->d_ino != 0) {
 382 #                               if BYTE_ORDER == BIG_ENDIAN
 383                                         if (Bcvt)
 384                                                 dp->d_namlen = dp->d_type;
 385 #                               else
 386                                         if (!Bcvt)
 387                                                 dp->d_namlen = dp->d_type;
 388 #                               endif
 389                                 dp->d_type = DT_UNKNOWN;
 390                         }
 391 #ifdef  DIRDEBUG
 392                         printf ("reclen = %d, namlen = %d, type = %d\n",
 393                                 dp->d_reclen, dp->d_namlen, dp->d_type);
 394 #endif
 395                         i = DIRBLKSIZ - (loc & (DIRBLKSIZ - 1));
 396                         if ((dp->d_reclen & 0x3) != 0 ||
 397                             dp->d_reclen > i ||
 398                             dp->d_reclen < DIRSIZ(0, dp) ||
 399                             dp->d_namlen > MAXNAMLEN) {
 400                                 Vprintf(stdout, "Mangled directory: ");
 401                                 if ((dp->d_reclen & 0x3) != 0)
 402                                         Vprintf(stdout,
 403                                            "reclen not multiple of 4 ");
 404                                 if (dp->d_reclen < DIRSIZ(0, dp))
 405                                         Vprintf(stdout,
 406                                            "reclen less than DIRSIZ (%d < %d) ",
 407                                            dp->d_reclen, DIRSIZ(0, dp));
 408                                 if (dp->d_namlen > MAXNAMLEN)
 409                                         Vprintf(stdout,
 410                                            "reclen name too big (%d > %d) ",
 411                                            dp->d_namlen, MAXNAMLEN);
 412                                 Vprintf(stdout, "\n");
 413                                 loc += i;
 414                                 continue;
 415                         }
 416                         loc += dp->d_reclen;
 417                         if (dp->d_ino != 0) {
 418                                 putent(dp);
 419                         }
 420                 }
 421         }
 422 }
 423
 424 /*
 425  * These variables are "local" to the following two functions.
 426  */
 427 char dirbuf[DIRBLKSIZ];
 428 long dirloc = 0;
 429 long prev = 0;
 430
 431 /*
 432  * add a new directory entry to a file.
 433  */
 434 static void
 435 putent(struct direct *dp)
 436 {
 437         dp->d_reclen = DIRSIZ(0, dp);
 438         if (dirloc + dp->d_reclen > DIRBLKSIZ) {
 439                 ((struct direct *)(dirbuf + prev))->d_reclen =
 440                     DIRBLKSIZ - prev;
 441                 (void) fwrite(dirbuf, 1, DIRBLKSIZ, df);
 442                 dirloc = 0;
 443         }
 444         memmove(dirbuf + dirloc, dp, (size_t)dp->d_reclen);
 445         prev = dirloc;
 446         dirloc += dp->d_reclen;
 447 }
 448
 449 /*
 450  * flush out a directory that is finished.
 451  */
 452 static void
 453 flushent(void)
 454 {
 455         ((struct direct *)(dirbuf + prev))->d_reclen = DIRBLKSIZ - prev;
 456         (void) fwrite(dirbuf, (int)dirloc, 1, df);
 457         seekpt = ftell(df);
 458         dirloc = 0;
 459 }
 460
 461 static void
 462 dcvt(struct odirect *odp, struct direct *ndp)
 463 {
 464
 465         memset(ndp, 0, (size_t)(sizeof *ndp));
 466         ndp->d_ino =  odp->d_ino;
 467         ndp->d_type = DT_UNKNOWN;
 468         (void) strncpy(ndp->d_name, odp->d_name, ODIRSIZ);
 469         ndp->d_namlen = strlen(ndp->d_name);
 470         ndp->d_reclen = DIRSIZ(0, ndp);
 471 }
 472
 473 /*
 474  * Seek to an entry in a directory.
 475  * Only values returned by rst_telldir should be passed to rst_seekdir.
 476  * This routine handles many directories in a single file.
 477  * It takes the base of the directory in the file, plus
 478  * the desired seek offset into it.
 479  */
 480 static void
 481 rst_seekdir(RST_DIR *dirp, long loc, long base)
 482 {
 483
 484         if (loc == rst_telldir(dirp))
 485                 return;
 486         loc -= base;
 487         if (loc < 0)
 488                 fprintf(stderr, "bad seek pointer to rst_seekdir %ld\n", loc);
 489         (void) lseek(dirp->dd_fd, base + (loc & ~(DIRBLKSIZ - 1)), SEEK_SET);
 490         dirp->dd_loc = loc & (DIRBLKSIZ - 1);
 491         if (dirp->dd_loc != 0)
 492                 dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ);
 493 }
 494
 495 /*
 496  * get next entry in a directory.
 497  */
 498 struct direct *
 499 rst_readdir(RST_DIR *dirp)
 500 {
 501         register struct direct *dp;
 502
 503         for (;;) {
 504                 if (dirp->dd_loc == 0) {
 505                         dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf,
 506                             DIRBLKSIZ);
 507                         if (dirp->dd_size <= 0) {
 508                                 Dprintf(stderr, "error reading directory\n");
 509                                 return (NULL);
 510                         }
 511                 }
 512                 if (dirp->dd_loc >= dirp->dd_size) {
 513                         dirp->dd_loc = 0;
 514                         continue;
 515                 }
 516                 dp = (struct direct *)(dirp->dd_buf + dirp->dd_loc);
 517                 if (dp->d_reclen == 0 ||
 518                     dp->d_reclen > DIRBLKSIZ + 1 - dirp->dd_loc) {
 519                         Dprintf(stderr, "corrupted directory: bad reclen %d\n",
 520                                 dp->d_reclen);
 521                         return (NULL);
 522                 }
 523                 dirp->dd_loc += dp->d_reclen;
 524                 if (dp->d_ino == 0 && strcmp(dp->d_name, "/") == 0)
 525                         return (NULL);
 526                 if (dp->d_ino >= maxino) {
 527                         Dprintf(stderr, "corrupted directory: bad inum %d\n",
 528                                 dp->d_ino);
 529                         continue;
 530                 }
 531                 return (dp);
 532         }
 533 }
 534
 535 /*
 536  * Simulate the opening of a directory
 537  */
 538 RST_DIR *
 539 rst_opendir(const char *name)
 540 {
 541         struct inotab *itp;
 542         RST_DIR *dirp;
 543         ino_t ino;
 544
 545         if ((ino = dirlookup(name)) > 0 &&
 546             (itp = inotablookup(ino)) != NULL) {
 547                 dirp = opendirfile(dirfile);
 548                 rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 549                 return (dirp);
 550         }
 551         return (NULL);
 552 }
 553
 554 /*
 555  * In our case, there is nothing to do when closing a directory.
 556  */
 557 void
 558 rst_closedir(RST_DIR *dirp)
 559 {
 560
 561         (void)close(dirp->dd_fd);
 562         free(dirp);
 563         return;
 564 }
 565
 566 /*
 567  * Simulate finding the current offset in the directory.
 568  */
 569 static long
 570 rst_telldir(RST_DIR *dirp)
 571 {
 572         return ((long)lseek(dirp->dd_fd,
 573             (off_t)0, SEEK_CUR) - dirp->dd_size + dirp->dd_loc);
 574 }
 575
 576 /*
 577  * Open a directory file.
 578  */
 579 static RST_DIR *
 580 opendirfile(const char *name)
 581 {
 582         register RST_DIR *dirp;
 583         register int fd;
 584
 585         if ((fd = open(name, O_RDONLY)) == -1)
 586                 return (NULL);
 587         if ((dirp = malloc(sizeof(RST_DIR))) == NULL) {
 588                 (void)close(fd);
 589                 return (NULL);
 590         }
 591         dirp->dd_fd = fd;
 592         dirp->dd_loc = 0;
 593         return (dirp);
 594 }
 595
 596 /*
 597  * Set the mode, owner, and times for all new or changed directories
 598  */
 599 void
 600 setdirmodes(int flags)
 601 {
 602         FILE *mf;
 603         struct modeinfo node;
 604         struct entry *ep;
 605         char *cp;
 606
 607         Vprintf(stdout, "Set directory mode, owner, and times.\n");
 608         if (command == 'r' || command == 'R')
 609                 (void) snprintf(modefile, sizeof(modefile), "%s/rstmode%lu", tmpdir, (long)dumpdate);
 610         if (modefile[0] == '#') {
 611                 panic("modefile not defined\n");
 612                 fprintf(stderr, "directory mode, owner, and times not set\n");
 613                 return;
 614         }
 615         mf = fopen(modefile, "r");
 616         if (mf == NULL) {
 617                 warn("fopen");
 618                 fprintf(stderr, "cannot open mode file %s\n", modefile);
 619                 fprintf(stderr, "directory mode, owner, and times not set\n");
 620                 return;
 621         }
 622         clearerr(mf);
 623         for (;;) {
 624                 (void) fread((char *)&node, 1, sizeof(struct modeinfo), mf);
 625                 if (feof(mf))
 626                         break;
 627                 ep = lookupino(node.ino);
 628                 if (command == 'i' || command == 'x') {
 629                         if (ep == NULL)
 630                                 continue;
 631                         if ((flags & FORCE) == 0 && ep->e_flags & EXISTED) {
 632                                 ep->e_flags &= ~NEW;
 633                                 continue;
 634                         }
 635                         if (node.ino == ROOTINO &&
 636                             reply("set owner/mode for '.'") == FAIL)
 637                                 continue;
 638                 }
 639                 if (ep == NULL) {
 640                         panic("cannot find directory inode %d\n", node.ino);
 641                 } else {
 642                         cp = myname(ep);
 643                         (void) chown(cp, node.uid, node.gid);
 644                         (void) chmod(cp, node.mode);
 645                         if (node.flags)
 646 #ifdef  __linux__
 647                                 (void) fsetflags(cp, node.flags);
 648 #else
 649                                 (void) chflags(cp, node.flags);
 650 #endif
 651                         utimes(cp, node.timep);
 652                         ep->e_flags &= ~NEW;
 653                 }
 654         }
 655         if (ferror(mf))
 656                 panic("error setting directory modes\n");
 657         (void) fclose(mf);
 658 }
 659
 660 /*
 661  * Generate a literal copy of a directory.
 662  */
 663 int
 664 genliteraldir(char *name, ino_t ino)
 665 {
 666         register struct inotab *itp;
 667         int ofile, dp, i, size;
 668         char buf[BUFSIZ];
 669
 670         itp = inotablookup(ino);
 671         if (itp == NULL)
 672                 panic("Cannot find directory inode %d named %s\n", ino, name);
 673         if ((ofile = open(name, O_WRONLY | O_CREAT | O_TRUNC, 0666)) < 0) {
 674                 warn("%s: cannot create file\n", name);
 675                 return (FAIL);
 676         }
 677         rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 678         dp = dup(dirp->dd_fd);
 679         for (i = itp->t_size; i > 0; i -= BUFSIZ) {
 680                 size = i < BUFSIZ ? i : BUFSIZ;
 681                 if (read(dp, buf, (int) size) == -1) {
 682                         warnx("write error extracting inode %lu, name %s\n",
 683                                 (unsigned long)curfile.ino, curfile.name);
 684                         err(1, "read");
 685                 }
 686                 if (!Nflag && write(ofile, buf, (int) size) == -1) {
 687                         warnx("write error extracting inode %lu, name %s\n",
 688                                 (unsigned long)curfile.ino, curfile.name);
 689                         err(1, "write");
 690                 }
 691         }
 692         (void) close(dp);
 693         (void) close(ofile);
 694         return (GOOD);
 695 }
 696
 697 /*
 698  * Determine the type of an inode
 699  */
 700 int
 701 inodetype(ino_t ino)
 702 {
 703         struct inotab *itp;
 704
 705         itp = inotablookup(ino);
 706         if (itp == NULL)
 707                 return (LEAF);
 708         return (NODE);
 709 }
 710
 711 /*
 712  * Allocate and initialize a directory inode entry.
 713  * If requested, save its pertinent mode, owner, and time info.
 714  */
 715 static struct inotab *
 716 #ifdef  __linux__
 717 allocinotab(ino_t ino, struct new_bsd_inode *dip, long seekpt)
 718 #else
 719 allocinotab(ino_t ino, struct dinode *dip, long seekpt)
 720 #endif
 721 {
 722         register struct inotab  *itp;
 723         struct modeinfo node;
 724
 725         itp = calloc(1, sizeof(struct inotab));
 726         if (itp == NULL)
 727                 panic("no memory directory table\n");
 728         itp->t_next = inotab[INOHASH(ino)];
 729         inotab[INOHASH(ino)] = itp;
 730         itp->t_ino = ino;
 731         itp->t_seekpt = seekpt;
 732         if (mf == NULL)
 733                 return (itp);
 734         node.ino = ino;
 735 #ifdef  __linux__
 736         node.timep[0].tv_sec = dip->di_atime.tv_sec;
 737         node.timep[0].tv_usec = dip->di_atime.tv_usec;
 738         node.timep[1].tv_sec = dip->di_mtime.tv_sec;
 739         node.timep[1].tv_usec = dip->di_mtime.tv_usec;
 740 #else   /* __linux__ */
 741         node.timep[0].tv_sec = dip->di_atime;
 742         node.timep[0].tv_usec = dip->di_atimensec / 1000;
 743         node.timep[1].tv_sec = dip->di_mtime;
 744         node.timep[1].tv_usec = dip->di_mtimensec / 1000;
 745 #endif  /* __linux__ */
 746         node.mode = dip->di_mode;
 747         node.flags = dip->di_flags;
 748         node.uid = dip->di_uid;
 749         node.gid = dip->di_gid;
 750         (void) fwrite((char *)&node, 1, sizeof(struct modeinfo), mf);
 751         return (itp);
 752 }
 753
 754 /*
 755  * Look up an inode in the table of directories
 756  */
 757 static struct inotab *
 758 inotablookup(ino_t ino)
 759 {
 760         register struct inotab *itp;
 761
 762         for (itp = inotab[INOHASH(ino)]; itp != NULL; itp = itp->t_next)
 763                 if (itp->t_ino == ino)
 764                         return (itp);
 765         return (NULL);
 766 }
 767
 768 /*
 769  * Clean up and exit
 770  */
 771 void
 772 cleanup(void)
 773 {
 774         closemt();
 775         if (modefile[0] != '#')
 776                 (void) unlink(modefile);
 777         if (dirfile[0] != '#')
 778                 (void) unlink(dirfile);
 779 }