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. Neither the name of the University nor the names of its contributors
  27  *    may be used to endorse or promote products derived from this software
  28  *    without specific prior written permission.
  29  *
  30  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  31  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  32  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  33  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  34  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  35  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  36  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  37  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  38  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  39  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  40  * SUCH DAMAGE.
  41  */
  42
  43 #ifndef lint
  44 static const char rcsid[] =
  45         "$Id: dirs.c,v 1.34 2007/02/22 20:16:23 stelian Exp $";
  46 #endif /* not lint */
  47
  48 #include <config.h>
  49 #include <compatlfs.h>
  50 #include <sys/types.h>
  51 #include <sys/param.h>
  52 #include <sys/file.h>
  53 #include <sys/stat.h>
  54
  55 #ifdef  __linux__
  56 #ifdef HAVE_EXT2FS_EXT2_FS_H
  57 #include <ext2fs/ext2_fs.h>
  58 #else
  59 #include <linux/ext2_fs.h>
  60 #endif
  61 #include <bsdcompat.h>
  62 #else   /* __linux__ */
  63 #ifdef sunos
  64 #include <sys/fcntl.h>
  65 #include <bsdcompat.h>
  66 #else
  67 #include <ufs/ufs/dinode.h>
  68 #include <ufs/ufs/dir.h>
  69 #endif
  70 #endif  /* __linux__ */
  71 #include <protocols/dumprestore.h>
  72
  73 #include <compaterr.h>
  74 #include <errno.h>
  75 #include <stdio.h>
  76 #include <stdlib.h>
  77 #include <string.h>
  78 #include <unistd.h>
  79
  80 #ifdef  __linux__
  81 #include <endian.h>
  82 #else
  83 #ifdef sunos
  84 #include <arpa/nameser_compat.h>
  85 #else
  86 #include <machine/endian.h>
  87 #endif
  88 #endif
  89
  90 #include "pathnames.h"
  91 #include "restore.h"
  92 #include "extern.h"
  93
  94 /*
  95  * Symbol table of directories read from tape.
  96  */
  97 #define HASHSIZE        1000
  98 #define INOHASH(val) (val % HASHSIZE)
  99 struct inotab {
 100         struct  inotab *t_next;
 101         dump_ino_t t_ino;
 102         OFF_T   t_seekpt;
 103         OFF_T   t_size;
 104 };
 105 static struct inotab *inotab[HASHSIZE];
 106
 107 /*
 108  * Information retained about directories.
 109  */
 110 struct modeinfo {
 111         dump_ino_t ino;
 112         struct timeval timep[2];
 113         mode_t mode;
 114         uid_t uid;
 115         gid_t gid;
 116         unsigned int flags;
 117         char xattr;
 118 };
 119
 120 /*
 121  * Definitions for library routines operating on directories.
 122  */
 123 #undef DIRBLKSIZ
 124 #define DIRBLKSIZ 1024
 125 struct rstdirdesc {
 126         int     dd_fd;
 127         int32_t dd_loc;
 128         int32_t dd_size;
 129         char    dd_buf[DIRBLKSIZ];
 130 };
 131
 132 /*
 133  * Global variables for this file.
 134  */
 135 static OFF_T    seekpt;
 136 static FILE     *df, *mf;
 137 static RST_DIR  *dirp;
 138 static char     dirfile[MAXPATHLEN] = "#";      /* No file */
 139 static char     modefile[MAXPATHLEN] = "#";     /* No file */
 140 static char     dot[2] = ".";                   /* So it can be modified */
 141
 142 /*
 143  * Format of old style directories.
 144  */
 145 #define ODIRSIZ 14
 146 struct odirect {
 147         u_short d_ino;
 148         char    d_name[ODIRSIZ];
 149 };
 150
 151 #if defined(__linux__) || defined(sunos)
 152 static struct inotab    *allocinotab __P((dump_ino_t, OFF_T));
 153 static void             savemodeinfo __P((dump_ino_t, struct new_bsd_inode *, char *));
 154 #else
 155 static struct inotab    *allocinotab __P((dump_ino_t, OFF_T));
 156 static void             savemodeinfo __P((dump_ino_t, struct dinode *, char *));
 157 #endif
 158 static void              dcvt __P((struct odirect *, struct direct *));
 159 static void              flushent __P((void));
 160 static struct inotab    *inotablookup __P((dump_ino_t));
 161 static RST_DIR          *opendirfile __P((const char *));
 162 static void              putdir __P((char *, size_t));
 163 static void              putent __P((struct direct *));
 164 static void             rst_seekdir __P((RST_DIR *, OFF_T, OFF_T));
 165 static OFF_T            rst_telldir __P((RST_DIR *));
 166 static struct direct    *searchdir __P((dump_ino_t, char *));
 167
 168 #ifdef sunos
 169 extern int fdsmtc;
 170 #endif
 171
 172 /*
 173  *      Extract directory contents, building up a directory structure
 174  *      on disk for extraction by name.
 175  *      If genmode is requested, save mode, owner, and times for all
 176  *      directories on the tape.
 177  */
 178 void
 179 extractdirs(int genmode)
 180 {
 181         int i;
 182 #if defined(__linux__) || defined(sunos)
 183         struct new_bsd_inode ip;
 184 #else
 185         struct dinode ip;
 186 #endif
 187         struct inotab *itp;
 188         struct direct nulldir;
 189         int fd;
 190         char xattr[XATTR_MAXSIZE];
 191         int xattr_found = 0;
 192         dump_ino_t ino;
 193
 194         Vprintf(stdout, "Extract directories from tape\n");
 195         (void) snprintf(dirfile, sizeof(dirfile), "%s/rstdir%ld", tmpdir,
 196                 (long)dumpdate);
 197         if (command != 'r' && command != 'R') {
 198                 (void) strncat(dirfile, "-XXXXXX",
 199                         sizeof(dirfile) - strlen(dirfile));
 200                 fd = MKSTEMP(dirfile);
 201         } else
 202                 fd = OPEN(dirfile, O_RDWR|O_CREAT|O_EXCL, 0666);
 203         if (fd == -1 || (df = fdopen(fd, "w")) == NULL) {
 204                 if (fd != -1)
 205                         close(fd);
 206                 err(1, "cannot create directory temporary %s", dirfile);
 207         }
 208         if (genmode != 0) {
 209                 (void) snprintf(modefile, sizeof(modefile), "%s/rstmode%ld", tmpdir, (long)dumpdate);
 210                 if (command != 'r' && command != 'R') {
 211                         (void) strncat(modefile, "-XXXXXX",
 212                                 sizeof(modefile) - strlen(modefile));
 213                         fd = MKSTEMP(modefile);
 214                 } else
 215                         fd = OPEN(modefile, O_RDWR|O_CREAT|O_EXCL, 0666);
 216                 if (fd == -1 || (mf = fdopen(fd, "w")) == NULL) {
 217                         if (fd != -1)
 218                                 close(fd);
 219                         err(1, "cannot create modefile %s", modefile);
 220                 }
 221         }
 222         nulldir.d_ino = 0;
 223         nulldir.d_type = DT_DIR;
 224         nulldir.d_namlen = 1;
 225         nulldir.d_name[0] = '/';
 226         nulldir.d_name[1] = '\0';
 227         nulldir.d_reclen = DIRSIZ(0, &nulldir);
 228         for (;;) {
 229                 curfile.name = "<directory file - name unknown>";
 230                 curfile.action = USING;
 231                 ino = curfile.ino;
 232                 if (curfile.dip == NULL || (curfile.dip->di_mode & IFMT) != IFDIR) {
 233                         if ( fclose(df) == EOF )
 234                                 err(1, "cannot write to file %s", dirfile);
 235                         dirp = opendirfile(dirfile);
 236                         if (dirp == NULL)
 237                                 warn("opendirfile");
 238                         if (mf != NULL && fclose(mf) == EOF )
 239                                 err(1, "cannot write to file %s", dirfile);
 240                         i = dirlookup(dot);
 241                         if (i == 0)
 242                                 panic("Root directory is not on tape\n");
 243                         return;
 244                 }
 245                 memcpy(&ip, curfile.dip, sizeof(ip));
 246                 itp = allocinotab(ino, seekpt);
 247                 getfile(putdir, xtrnull);
 248                 xattr_found = 0;
 249                 while (spcl.c_flags & DR_EXTATTRIBUTES) {
 250                         switch (spcl.c_extattributes) {
 251                         case EXT_MACOSFNDRINFO:
 252                                 msg("MacOSX attributes not supported, skipping\n");
 253                                 skipfile();
 254                                 break;
 255                         case EXT_MACOSRESFORK:
 256                                 msg("MacOSX attributes not supported, skipping\n");
 257                                 skipfile();
 258                                 break;
 259                         case EXT_XATTR:
 260                                 if (readxattr(xattr) == GOOD)
 261                                         xattr_found = 1;
 262                                 break;
 263                         }
 264                 }
 265                 if (xattr_found)
 266                         savemodeinfo(ino, &ip, xattr);
 267                 else
 268                         savemodeinfo(ino, &ip, NULL);
 269                 putent(&nulldir);
 270                 flushent();
 271                 itp->t_size = seekpt - itp->t_seekpt;
 272         }
 273 }
 274
 275 /*
 276  * skip over all the directories on the tape
 277  */
 278 void
 279 skipdirs(void)
 280 {
 281
 282         while (curfile.dip && (curfile.dip->di_mode & IFMT) == IFDIR) {
 283                 skipfile();
 284         }
 285 }
 286
 287 /*
 288  *      Recursively find names and inumbers of all files in subtree
 289  *      pname and pass them off to be processed.
 290  */
 291 void
 292 treescan(char *pname, dump_ino_t ino, long (*todo) __P((char *, dump_ino_t, int)))
 293 {
 294         struct inotab *itp;
 295         struct direct *dp;
 296         int namelen;
 297         OFF_T bpt;
 298         char locname[MAXPATHLEN + 1];
 299
 300         itp = inotablookup(ino);
 301         if (itp == NULL) {
 302                 /*
 303                  * Pname is name of a simple file or an unchanged directory.
 304                  */
 305                 (void) (*todo)(pname, ino, LEAF);
 306                 return;
 307         }
 308         /*
 309          * Pname is a dumped directory name.
 310          */
 311         if ((*todo)(pname, ino, NODE) == FAIL)
 312                 return;
 313         /*
 314          * begin search through the directory
 315          * skipping over "." and ".."
 316          */
 317         namelen = snprintf(locname, sizeof(locname), "%s/", pname);
 318         if (namelen >= (int)sizeof(locname))
 319                 namelen = sizeof(locname) - 1;
 320         rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 321         dp = rst_readdir(dirp); /* "." */
 322         if (dp != NULL && strcmp(dp->d_name, ".") == 0)
 323                 dp = rst_readdir(dirp); /* ".." */
 324         else
 325                 fprintf(stderr, "Warning: `.' missing from directory %s\n",
 326                         pname);
 327         if (dp != NULL && strcmp(dp->d_name, "..") == 0)
 328                 dp = rst_readdir(dirp); /* first real entry */
 329         else
 330                 fprintf(stderr, "Warning: `..' missing from directory %s\n",
 331                         pname);
 332         bpt = rst_telldir(dirp);
 333         /*
 334          * a zero inode signals end of directory
 335          */
 336         while (dp != NULL) {
 337                 locname[namelen] = '\0';
 338                 if (namelen + dp->d_namlen >= (int)sizeof(locname)) {
 339                         fprintf(stderr, "%s%s: name exceeds %ld char\n",
 340                                 locname, dp->d_name, (long)sizeof(locname) - 1);
 341                 } else {
 342                         (void) strncat(locname, dp->d_name, (int)dp->d_namlen);
 343                         treescan(locname, dp->d_ino, todo);
 344                         rst_seekdir(dirp, bpt, itp->t_seekpt);
 345                 }
 346                 dp = rst_readdir(dirp);
 347                 bpt = rst_telldir(dirp);
 348         }
 349 }
 350
 351 /*
 352  * Lookup a pathname which is always assumed to start from the ROOTINO.
 353  */
 354 struct direct *
 355 pathsearch(const char *pathname)
 356 {
 357         dump_ino_t ino;
 358         struct direct *dp;
 359         char *path, *name, buffer[MAXPATHLEN];
 360
 361         strcpy(buffer, pathname);
 362         path = buffer;
 363         ino = ROOTINO;
 364         while (*path == '/')
 365                 path++;
 366         dp = NULL;
 367 #ifdef __linux__
 368         while ((name = strsep(&path, "/")) != NULL && *name /* != NULL */) {
 369 #else
 370         while ((name = strtok_r(NULL, "/", &path)) != NULL && *name /* != NULL */) {
 371 #endif
 372                 if ((dp = searchdir(ino, name)) == NULL)
 373                         return (NULL);
 374                 ino = dp->d_ino;
 375         }
 376         return (dp);
 377 }
 378
 379 /*
 380  * Lookup the requested name in directory inum.
 381  * Return its inode number if found, zero if it does not exist.
 382  */
 383 static struct direct *
 384 searchdir(dump_ino_t inum, char *name)
 385 {
 386         struct direct *dp;
 387         struct inotab *itp;
 388         int len;
 389
 390         itp = inotablookup(inum);
 391         if (itp == NULL)
 392                 return (NULL);
 393         rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 394         len = strlen(name);
 395         do {
 396                 dp = rst_readdir(dirp);
 397                 if (dp == NULL)
 398                         return (NULL);
 399         } while (dp->d_namlen != len || strncmp(dp->d_name, name, len) != 0);
 400         return (dp);
 401 }
 402
 403 /*
 404  * Put the directory entries in the directory file
 405  */
 406 static void
 407 putdir(char *buf, size_t size)
 408 {
 409         struct direct cvtbuf;
 410         struct odirect *odp;
 411         struct odirect *eodp;
 412         struct direct *dp;
 413         long loc, i;
 414
 415         if (cvtflag && !ufs2flag) {
 416                 eodp = (struct odirect *)&buf[size];
 417                 for (odp = (struct odirect *)buf; odp < eodp; odp++)
 418                         if (odp->d_ino != 0) {
 419                                 dcvt(odp, &cvtbuf);
 420                                 putent(&cvtbuf);
 421                         }
 422         } else {
 423                 for (loc = 0; loc < (long)size; ) {
 424                         dp = (struct direct *)(buf + loc);
 425 #ifdef  DIRDEBUG
 426                         printf ("reclen = %d, namlen = %d, type = %d\n",
 427                                 dp->d_reclen, dp->d_namlen, dp->d_type);
 428 #endif
 429                         if (Bcvt)
 430                                 swabst((u_char *)"is", (u_char *) dp);
 431                         if (oldinofmt && dp->d_ino != 0) {
 432 #                               if BYTE_ORDER == BIG_ENDIAN
 433                                         if (Bcvt)
 434                                                 dp->d_namlen = dp->d_type;
 435 #                               else
 436                                         if (!Bcvt)
 437                                                 dp->d_namlen = dp->d_type;
 438 #                               endif
 439                                 if (dp->d_namlen == 0 && dp->d_type != 0)
 440                                         dp->d_namlen = dp->d_type;
 441                                 dp->d_type = DT_UNKNOWN;
 442                         }
 443 #ifdef  DIRDEBUG
 444                         printf ("reclen = %d, namlen = %d, type = %d\n",
 445                                 dp->d_reclen, dp->d_namlen, dp->d_type);
 446 #endif
 447                         i = DIRBLKSIZ - (loc & (DIRBLKSIZ - 1));
 448                         if ((dp->d_reclen & 0x3) != 0 ||
 449                             dp->d_reclen > i ||
 450                             dp->d_reclen < DIRSIZ(0, dp)
 451 #if MAXNAMLEN < 255
 452                             || dp->d_namlen > MAXNAMLEN
 453 #endif
 454                             ) {
 455                                 Vprintf(stdout, "Mangled directory: ");
 456                                 if ((dp->d_reclen & 0x3) != 0)
 457                                         Vprintf(stdout,
 458                                            "reclen not multiple of 4 ");
 459                                 if (dp->d_reclen < DIRSIZ(0, dp))
 460                                         Vprintf(stdout,
 461                                            "reclen less than DIRSIZ (%d < %d) ",
 462                                            dp->d_reclen, DIRSIZ(0, dp));
 463 #if MAXNAMLEN < 255
 464                                 if (dp->d_namlen > MAXNAMLEN)
 465                                         Vprintf(stdout,
 466                                            "reclen name too big (%d > %d) ",
 467                                            dp->d_namlen, MAXNAMLEN);
 468 #endif
 469                                 Vprintf(stdout, "\n");
 470                                 loc += i;
 471                                 continue;
 472                         }
 473                         loc += dp->d_reclen;
 474                         if (dp->d_ino != 0) {
 475                                 putent(dp);
 476                         }
 477                 }
 478         }
 479 }
 480
 481 /*
 482  * These variables are "local" to the following two functions.
 483  */
 484 static char dirbuf[DIRBLKSIZ];
 485 static long dirloc = 0;
 486 static long prev = 0;
 487
 488 /*
 489  * add a new directory entry to a file.
 490  */
 491 static void
 492 putent(struct direct *dp)
 493 {
 494         dp->d_reclen = DIRSIZ(0, dp);
 495         if (dirloc + dp->d_reclen > DIRBLKSIZ) {
 496                 ((struct direct *)(dirbuf + prev))->d_reclen =
 497                     DIRBLKSIZ - prev;
 498                 if ( fwrite(dirbuf, 1, DIRBLKSIZ, df) != DIRBLKSIZ )
 499                         err(1,"cannot write to file %s", dirfile);
 500                 dirloc = 0;
 501         }
 502         memmove(dirbuf + dirloc, dp, (size_t)dp->d_reclen);
 503         prev = dirloc;
 504         dirloc += dp->d_reclen;
 505 }
 506
 507 /*
 508  * flush out a directory that is finished.
 509  */
 510 static void
 511 flushent(void)
 512 {
 513         ((struct direct *)(dirbuf + prev))->d_reclen = DIRBLKSIZ - prev;
 514         if ( fwrite(dirbuf, (int)dirloc, 1, df) != 1 )
 515                 err(1, "cannot write to file %s", dirfile);
 516         seekpt = FTELL(df);
 517         if (seekpt == -1)
 518                 err(1, "cannot write to file %s", dirfile);
 519         dirloc = 0;
 520 }
 521
 522 static void
 523 dcvt(struct odirect *odp, struct direct *ndp)
 524 {
 525
 526         memset(ndp, 0, (size_t)(sizeof *ndp));
 527         ndp->d_ino =  odp->d_ino;
 528         ndp->d_type = DT_UNKNOWN;
 529         (void) strncpy(ndp->d_name, odp->d_name, ODIRSIZ);
 530         ndp->d_namlen = strlen(ndp->d_name);
 531         ndp->d_reclen = DIRSIZ(0, ndp);
 532 }
 533
 534 /*
 535  * Seek to an entry in a directory.
 536  * Only values returned by rst_telldir should be passed to rst_seekdir.
 537  * This routine handles many directories in a single file.
 538  * It takes the base of the directory in the file, plus
 539  * the desired seek offset into it.
 540  */
 541 static void
 542 rst_seekdir(RST_DIR *dirp, OFF_T loc, OFF_T base)
 543 {
 544
 545         if (loc == rst_telldir(dirp))
 546                 return;
 547         loc -= base;
 548         if (loc < 0)
 549                 fprintf(stderr, "bad seek pointer to rst_seekdir %lld\n", (long long int)loc);
 550         (void) LSEEK(dirp->dd_fd, base + (loc & ~(DIRBLKSIZ - 1)), SEEK_SET);
 551         dirp->dd_loc = loc & (DIRBLKSIZ - 1);
 552         if (dirp->dd_loc != 0)
 553                 dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ);
 554 }
 555
 556 /*
 557  * get next entry in a directory.
 558  */
 559 struct direct *
 560 rst_readdir(RST_DIR *dirp)
 561 {
 562         struct direct *dp;
 563
 564         for (;;) {
 565                 if (dirp->dd_loc == 0) {
 566                         dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf,
 567                             DIRBLKSIZ);
 568                         if (dirp->dd_size <= 0) {
 569                                 Dprintf(stderr, "error reading directory\n");
 570                                 return (NULL);
 571                         }
 572                 }
 573                 if (dirp->dd_loc >= dirp->dd_size) {
 574                         dirp->dd_loc = 0;
 575                         continue;
 576                 }
 577                 dp = (struct direct *)(dirp->dd_buf + dirp->dd_loc);
 578                 if (dp->d_reclen == 0 ||
 579                     dp->d_reclen > DIRBLKSIZ + 1 - dirp->dd_loc) {
 580                         Dprintf(stderr, "corrupted directory: bad reclen %d\n",
 581                                 dp->d_reclen);
 582                         return (NULL);
 583                 }
 584                 dirp->dd_loc += dp->d_reclen;
 585                 if (dp->d_ino == 0 && strcmp(dp->d_name, "/") == 0)
 586                         return (NULL);
 587                 if (dp->d_ino >= maxino) {
 588                         Dprintf(stderr, "corrupted directory: bad inum %d\n",
 589                                 dp->d_ino);
 590                         continue;
 591                 }
 592                 return (dp);
 593         }
 594 }
 595
 596 /*
 597  * Simulate the opening of a directory
 598  */
 599 RST_DIR *
 600 rst_opendir(const char *name)
 601 {
 602         struct inotab *itp;
 603         RST_DIR *dirp;
 604         dump_ino_t ino;
 605
 606         if ((ino = dirlookup(name)) > 0 &&
 607             (itp = inotablookup(ino)) != NULL) {
 608                 dirp = opendirfile(dirfile);
 609                 rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 610                 return (dirp);
 611         }
 612         return (NULL);
 613 }
 614
 615 /*
 616  * In our case, there is nothing to do when closing a directory.
 617  */
 618 void
 619 rst_closedir(RST_DIR *dirp)
 620 {
 621
 622         (void)close(dirp->dd_fd);
 623         free(dirp);
 624         return;
 625 }
 626
 627 /*
 628  * Simulate finding the current offset in the directory.
 629  */
 630 static OFF_T
 631 rst_telldir(RST_DIR *dirp)
 632 {
 633         return ((OFF_T)LSEEK(dirp->dd_fd,
 634                 (OFF_T)0, SEEK_CUR) - dirp->dd_size + dirp->dd_loc);
 635 }
 636
 637 /*
 638  * Open a directory file.
 639  */
 640 static RST_DIR *
 641 opendirfile(const char *name)
 642 {
 643         RST_DIR *dirp;
 644         int fd;
 645
 646         if ((fd = OPEN(name, O_RDONLY)) == -1)
 647                 return (NULL);
 648         if ((dirp = malloc(sizeof(RST_DIR))) == NULL) {
 649                 (void)close(fd);
 650                 return (NULL);
 651         }
 652         dirp->dd_fd = fd;
 653         dirp->dd_loc = 0;
 654         return (dirp);
 655 }
 656
 657 /*
 658  * Set the mode, owner, and times for all new or changed directories
 659  */
 660 void
 661 setdirmodes(int flags)
 662 {
 663         FILE *mf;
 664         struct modeinfo node;
 665         struct entry *ep;
 666         char *cp;
 667
 668         Vprintf(stdout, "Set directory mode, owner, and times.\n");
 669         if (command == 'r' || command == 'R')
 670                 (void) snprintf(modefile, sizeof(modefile), "%s/rstmode%lu", tmpdir, (long)dumpdate);
 671         if (modefile[0] == '#') {
 672                 panic("modefile not defined\n");
 673                 fprintf(stderr, "directory mode, owner, and times not set\n");
 674                 return;
 675         }
 676         mf = fopen(modefile, "r");
 677         if (mf == NULL) {
 678                 warn("fopen");
 679                 fprintf(stderr, "cannot open mode file %s\n", modefile);
 680                 fprintf(stderr, "directory mode, owner, and times not set\n");
 681                 return;
 682         }
 683         clearerr(mf);
 684         for (;;) {
 685                 char xattr[XATTR_MAXSIZE];
 686                 (void) fread((char *)&node, 1, sizeof(struct modeinfo), mf);
 687                 if (feof(mf))
 688                         break;
 689                 if (node.xattr) {
 690                         (void) fread(xattr, 1, XATTR_MAXSIZE, mf);
 691                         if (feof(mf))
 692                                 break;
 693                 }
 694                 ep = lookupino(node.ino);
 695                 if (command == 'i' || command == 'x') {
 696                         if (ep == NULL)
 697                                 continue;
 698                         if ((flags & FORCE) == 0 && ep->e_flags & EXISTED) {
 699                                 ep->e_flags &= ~NEW;
 700                                 continue;
 701                         }
 702                         if ((flags & FORCE) == 0 &&
 703                             node.ino == ROOTINO &&
 704                             reply("set owner/mode for '.'") == FAIL)
 705                                 continue;
 706                 }
 707                 if (ep == NULL) {
 708                         panic("cannot find directory inode %d\n", node.ino);
 709                 } else {
 710                         cp = myname(ep);
 711                         (void) chown(cp, node.uid, node.gid);
 712                         (void) chmod(cp, node.mode);
 713                         utimes(cp, node.timep);
 714                         if (node.xattr)
 715                                 xattr_extract(cp, xattr);
 716                         ep->e_flags &= ~NEW;
 717                         if (node.flags)
 718 #ifdef  __linux__
 719                                 (void) lsetflags(cp, node.flags);
 720 #else
 721 #ifdef sunos
 722 #else
 723                                 (void) chflags(cp, node.flags);
 724 #endif
 725 #endif
 726                 }
 727         }
 728         if (ferror(mf))
 729                 panic("error setting directory modes\n");
 730         (void) fclose(mf);
 731 }
 732
 733 /*
 734  * In restore -C mode, tests the attributes for all directories
 735  */
 736 void
 737 comparedirmodes(void)
 738 {
 739         FILE *mf;
 740         struct modeinfo node;
 741         struct entry *ep;
 742         char *cp;
 743
 744         Vprintf(stdout, "Compare directories modes, owner, attributes.\n");
 745         if (modefile[0] == '#') {
 746                 panic("modefile not defined\n");
 747                 fprintf(stderr, "directory mode, owner, and times not set\n");
 748                 return;
 749         }
 750         mf = fopen(modefile, "r");
 751         if (mf == NULL) {
 752                 warn("fopen");
 753                 fprintf(stderr, "cannot open mode file %s\n", modefile);
 754                 fprintf(stderr, "directory mode, owner, and times not set\n");
 755                 return;
 756         }
 757         clearerr(mf);
 758         for (;;) {
 759                 char xattr[XATTR_MAXSIZE];
 760                 (void) fread((char *)&node, 1, sizeof(struct modeinfo), mf);
 761                 if (feof(mf))
 762                         break;
 763                 if (node.xattr) {
 764                         (void) fread(xattr, 1, XATTR_MAXSIZE, mf);
 765                         if (feof(mf))
 766                                 break;
 767                 }
 768                 ep = lookupino(node.ino);
 769                 if (ep == NULL) {
 770                         panic("cannot find directory inode %d\n", node.ino);
 771                 } else {
 772                         struct STAT sb;
 773                         unsigned long newflags;
 774
 775                         cp = myname(ep);
 776                         if (LSTAT(cp, &sb) < 0) {
 777                                 warn("unable to stat %s", cp);
 778                                 do_compare_error;
 779                                 continue;
 780                         }
 781
 782                         Vprintf(stdout, "comparing directory %s\n", cp);
 783
 784                         if (sb.st_mode != node.mode) {
 785                                 fprintf(stderr, "%s: mode changed from 0%o to 0%o.\n",
 786                                         cp, node.mode & 07777, sb.st_mode & 07777);
 787                                 do_compare_error;
 788                         }
 789                         if (sb.st_uid != node.uid) {
 790                                 fprintf(stderr, "%s: uid changed from %d to %d.\n",
 791                                         cp, node.uid, sb.st_uid);
 792                                 do_compare_error;
 793                         }
 794                         if (sb.st_gid != node.gid) {
 795                                 fprintf(stderr, "%s: gid changed from %d to %d.\n",
 796                                         cp, node.gid, sb.st_gid);
 797                                 do_compare_error;
 798                         }
 799 #ifdef  __linux__
 800                         if (lgetflags(cp, &newflags) < 0) {
 801                                 if (node.flags != 0) {
 802                                         warn("%s: lgetflags failed", cp);
 803                                         do_compare_error;
 804                                 }
 805                         }
 806                         else {
 807                                 if (newflags != node.flags) {
 808                                         fprintf(stderr, "%s: flags changed from 0x%08x to 0x%08lx.\n",
 809                                                 cp, node.flags, newflags);
 810                                         do_compare_error;
 811                                 }
 812                         }
 813 #endif
 814                         if (node.xattr) {
 815                                 if (xattr_compare(cp, xattr) == FAIL)
 816                                         do_compare_error;
 817                         }
 818                         else {
 819                                 if (xattr_compare(cp, NULL) == FAIL)
 820                                         do_compare_error;
 821                         }
 822                         ep->e_flags &= ~NEW;
 823                 }
 824         }
 825         if (ferror(mf))
 826                 panic("error setting directory modes\n");
 827         (void) fclose(mf);
 828 }
 829
 830 /*
 831  * Generate a literal copy of a directory.
 832  */
 833 int
 834 genliteraldir(char *name, dump_ino_t ino)
 835 {
 836         struct inotab *itp;
 837         int ofile, dp, i, size;
 838         char buf[BUFSIZ];
 839
 840         itp = inotablookup(ino);
 841         if (itp == NULL)
 842                 panic("Cannot find directory inode %d named %s\n", ino, name);
 843         if ((ofile = open(name, O_WRONLY | O_CREAT | O_TRUNC, 0666)) < 0) {
 844                 warn("%s: cannot create file\n", name);
 845                 return (FAIL);
 846         }
 847         rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 848         dp = dup(dirp->dd_fd);
 849         for (i = itp->t_size; i > 0; i -= BUFSIZ) {
 850                 size = i < BUFSIZ ? i : BUFSIZ;
 851                 if (read(dp, buf, (int) size) == -1) {
 852                         warnx("write error extracting inode %lu, name %s\n",
 853                                 (unsigned long)curfile.ino, curfile.name);
 854                         err(1, "read");
 855                 }
 856                 if (!Nflag && write(ofile, buf, (int) size) == -1) {
 857                         warnx("write error extracting inode %lu, name %s\n",
 858                                 (unsigned long)curfile.ino, curfile.name);
 859                         err(1, "write");
 860                 }
 861         }
 862         (void) close(dp);
 863         (void) close(ofile);
 864         return (GOOD);
 865 }
 866
 867 /*
 868  * Determine the type of an inode
 869  */
 870 int
 871 inodetype(dump_ino_t ino)
 872 {
 873         struct inotab *itp;
 874
 875         itp = inotablookup(ino);
 876         if (itp == NULL)
 877                 return (LEAF);
 878         return (NODE);
 879 }
 880
 881 /*
 882  * Allocate and initialize a directory inode entry.
 883  * If requested, save its pertinent mode, owner, and time info.
 884  */
 885 static struct inotab *
 886 #if defined(__linux__) || defined(sunos)
 887 allocinotab(dump_ino_t ino, OFF_T seekpt)
 888 #else
 889 allocinotab(dump_ino_t ino, OFF_T seekpt)
 890 #endif
 891 {
 892         struct inotab   *itp;
 893
 894         itp = calloc(1, sizeof(struct inotab));
 895         if (itp == NULL)
 896                 panic("no memory directory table\n");
 897         itp->t_next = inotab[INOHASH(ino)];
 898         inotab[INOHASH(ino)] = itp;
 899         itp->t_ino = ino;
 900         itp->t_seekpt = seekpt;
 901         return itp;
 902 }
 903
 904 static void
 905 #if defined(__linux__) || defined(sunos)
 906 savemodeinfo(dump_ino_t ino, struct new_bsd_inode *dip, char *xattr) {
 907 #else
 908 savemodeinfo(dump_ino_t ino, struct dinode *dip, char *xattr) {
 909 #endif
 910         struct modeinfo node;
 911
 912         if (mf == NULL)
 913                 return;
 914         node.ino = ino;
 915 #if defined(__linux__) || defined(sunos)
 916         node.timep[0].tv_sec = dip->di_atime.tv_sec;
 917         node.timep[0].tv_usec = dip->di_atime.tv_usec;
 918         node.timep[1].tv_sec = dip->di_mtime.tv_sec;
 919         node.timep[1].tv_usec = dip->di_mtime.tv_usec;
 920 #else   /* __linux__  || sunos */
 921         node.timep[0].tv_sec = dip->di_atime;
 922         node.timep[0].tv_usec = dip->di_atimensec / 1000;
 923         node.timep[1].tv_sec = dip->di_mtime;
 924         node.timep[1].tv_usec = dip->di_mtimensec / 1000;
 925 #endif  /* __linux__  || sunos */
 926         node.mode = dip->di_mode;
 927         node.flags = dip->di_flags;
 928         node.uid = dip->di_uid;
 929         node.gid = dip->di_gid;
 930         node.xattr = xattr ? 1 : 0;
 931         if ( fwrite((char *)&node, 1, sizeof(struct modeinfo), mf) != sizeof(struct modeinfo) )
 932                 err(1,"cannot write to file %s", modefile);
 933         if (xattr)
 934                 if ( fwrite(xattr, 1, XATTR_MAXSIZE, mf) != XATTR_MAXSIZE)
 935                         err(1,"cannot write to file %s", modefile);
 936 }
 937
 938 /*
 939  * Look up an inode in the table of directories
 940  */
 941 static struct inotab *
 942 inotablookup(dump_ino_t ino)
 943 {
 944         struct inotab *itp;
 945
 946         for (itp = inotab[INOHASH(ino)]; itp != NULL; itp = itp->t_next)
 947                 if (itp->t_ino == ino)
 948                         return (itp);
 949         return (NULL);
 950 }
 951
 952 /*
 953  * Clean up and exit
 954  */
 955 void
 956 cleanup(void)
 957 {
 958         closemt();
 959         if (modefile[0] != '#')
 960                 (void) unlink(modefile);
 961         if (dirfile[0] != '#')
 962                 (void) unlink(dirfile);
 963 }