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 1.30 2005/01/14 13:01:34 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 };
 118
 119 /*
 120  * Definitions for library routines operating on directories.
 121  */
 122 #undef DIRBLKSIZ
 123 #define DIRBLKSIZ 1024
 124 struct rstdirdesc {
 125         int     dd_fd;
 126         int32_t dd_loc;
 127         int32_t dd_size;
 128         char    dd_buf[DIRBLKSIZ];
 129 };
 130
 131 /*
 132  * Global variables for this file.
 133  */
 134 static OFF_T    seekpt;
 135 static FILE     *df, *mf;
 136 static RST_DIR  *dirp;
 137 static char     dirfile[MAXPATHLEN] = "#";      /* No file */
 138 static char     modefile[MAXPATHLEN] = "#";     /* No file */
 139 static char     dot[2] = ".";                   /* So it can be modified */
 140
 141 /*
 142  * Format of old style directories.
 143  */
 144 #define ODIRSIZ 14
 145 struct odirect {
 146         u_short d_ino;
 147         char    d_name[ODIRSIZ];
 148 };
 149
 150 #if defined(__linux__) || defined(sunos)
 151 static struct inotab    *allocinotab __P((dump_ino_t, OFF_T));
 152 static void              savemodeinfo __P((dump_ino_t, struct new_bsd_inode *));
 153 #else
 154 static struct inotab    *allocinotab __P((dump_ino_t, OFF_T));
 155 static void              savemodeinfo __P((dump_ino_t, struct dinode *));
 156 #endif
 157 static void              dcvt __P((struct odirect *, struct direct *));
 158 static void              flushent __P((void));
 159 static struct inotab    *inotablookup __P((dump_ino_t));
 160 static RST_DIR          *opendirfile __P((const char *));
 161 static void              putdir __P((char *, size_t));
 162 static void              putent __P((struct direct *));
 163 static void             rst_seekdir __P((RST_DIR *, OFF_T, OFF_T));
 164 static OFF_T            rst_telldir __P((RST_DIR *));
 165 static struct direct    *searchdir __P((dump_ino_t, char *));
 166
 167 #ifdef sunos
 168 extern int fdsmtc;
 169 #endif
 170
 171 /*
 172  *      Extract directory contents, building up a directory structure
 173  *      on disk for extraction by name.
 174  *      If genmode is requested, save mode, owner, and times for all
 175  *      directories on the tape.
 176  */
 177 void
 178 extractdirs(int genmode)
 179 {
 180         int i;
 181 #if defined(__linux__) || defined(sunos)
 182         struct new_bsd_inode ip;
 183 #else
 184         struct dinode ip;
 185 #endif
 186         struct inotab *itp;
 187         struct direct nulldir;
 188         int fd;
 189         dump_ino_t ino;
 190
 191         Vprintf(stdout, "Extract directories from tape\n");
 192         (void) snprintf(dirfile, sizeof(dirfile), "%s/rstdir%ld", tmpdir,
 193                 (long)dumpdate);
 194         if (command != 'r' && command != 'R') {
 195                 (void) strncat(dirfile, "-XXXXXX",
 196                         sizeof(dirfile) - strlen(dirfile));
 197                 fd = MKSTEMP(dirfile);
 198         } else
 199                 fd = OPEN(dirfile, O_RDWR|O_CREAT|O_EXCL, 0666);
 200         if (fd == -1 || (df = fdopen(fd, "w")) == NULL) {
 201                 if (fd != -1)
 202                         close(fd);
 203                 err(1, "cannot create directory temporary %s", dirfile);
 204         }
 205         if (genmode != 0) {
 206                 (void) snprintf(modefile, sizeof(modefile), "%s/rstmode%ld", tmpdir, (long)dumpdate);
 207                 if (command != 'r' && command != 'R') {
 208                         (void) strncat(modefile, "-XXXXXX",
 209                                 sizeof(modefile) - strlen(modefile));
 210                         fd = MKSTEMP(modefile);
 211                 } else
 212                         fd = OPEN(modefile, O_RDWR|O_CREAT|O_EXCL, 0666);
 213                 if (fd == -1 || (mf = fdopen(fd, "w")) == NULL) {
 214                         if (fd != -1)
 215                                 close(fd);
 216                         err(1, "cannot create modefile %s", modefile);
 217                 }
 218         }
 219         nulldir.d_ino = 0;
 220         nulldir.d_type = DT_DIR;
 221         nulldir.d_namlen = 1;
 222         nulldir.d_name[0] = '/';
 223         nulldir.d_name[1] = '\0';
 224         nulldir.d_reclen = DIRSIZ(0, &nulldir);
 225         for (;;) {
 226                 curfile.name = "<directory file - name unknown>";
 227                 curfile.action = USING;
 228                 ino = curfile.ino;
 229                 if (curfile.dip == NULL || (curfile.dip->di_mode & IFMT) != IFDIR) {
 230                         if ( fclose(df) == EOF )
 231                                 err(1, "cannot write to file %s", dirfile);
 232                         dirp = opendirfile(dirfile);
 233                         if (dirp == NULL)
 234                                 warn("opendirfile");
 235                         if (mf != NULL && fclose(mf) == EOF )
 236                                 err(1, "cannot write to file %s", dirfile);
 237                         i = dirlookup(dot);
 238                         if (i == 0)
 239                                 panic("Root directory is not on tape\n");
 240                         return;
 241                 }
 242                 memcpy(&ip, curfile.dip, sizeof(ip));
 243                 itp = allocinotab(ino, seekpt);
 244                 getfile(putdir, xtrnull);
 245                 while (spcl.c_flags & DR_EXTATTRIBUTES) {
 246                         switch (spcl.c_extattributes) {
 247                         case EXT_MACOSFNDRINFO:
 248                                 msg("MacOSX attributes not supported, skipping\n");
 249                                 skipfile();
 250                                 break;
 251                         case EXT_MACOSRESFORK:
 252                                 msg("MacOSX attributes not supported, skipping\n");
 253                                 skipfile();
 254                                 break;
 255                         case EXT_XATTR:
 256                                 msg("EA/ACLs attributes not supported, skipping\n");
 257                                 skipfile();
 258                                 break;
 259                         }
 260                 }
 261                 savemodeinfo(ino, &ip);
 262                 putent(&nulldir);
 263                 flushent();
 264                 itp->t_size = seekpt - itp->t_seekpt;
 265         }
 266 }
 267
 268 /*
 269  * skip over all the directories on the tape
 270  */
 271 void
 272 skipdirs(void)
 273 {
 274
 275         while (curfile.dip && (curfile.dip->di_mode & IFMT) == IFDIR) {
 276                 skipfile();
 277         }
 278 }
 279
 280 /*
 281  *      Recursively find names and inumbers of all files in subtree
 282  *      pname and pass them off to be processed.
 283  */
 284 void
 285 treescan(char *pname, dump_ino_t ino, long (*todo) __P((char *, dump_ino_t, int)))
 286 {
 287         struct inotab *itp;
 288         struct direct *dp;
 289         int namelen;
 290         OFF_T bpt;
 291         char locname[MAXPATHLEN + 1];
 292
 293         itp = inotablookup(ino);
 294         if (itp == NULL) {
 295                 /*
 296                  * Pname is name of a simple file or an unchanged directory.
 297                  */
 298                 (void) (*todo)(pname, ino, LEAF);
 299                 return;
 300         }
 301         /*
 302          * Pname is a dumped directory name.
 303          */
 304         if ((*todo)(pname, ino, NODE) == FAIL)
 305                 return;
 306         /*
 307          * begin search through the directory
 308          * skipping over "." and ".."
 309          */
 310         namelen = snprintf(locname, sizeof(locname), "%s/", pname);
 311         if (namelen >= (int)sizeof(locname))
 312                 namelen = sizeof(locname) - 1;
 313         rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 314         dp = rst_readdir(dirp); /* "." */
 315         if (dp != NULL && strcmp(dp->d_name, ".") == 0)
 316                 dp = rst_readdir(dirp); /* ".." */
 317         else
 318                 fprintf(stderr, "Warning: `.' missing from directory %s\n",
 319                         pname);
 320         if (dp != NULL && strcmp(dp->d_name, "..") == 0)
 321                 dp = rst_readdir(dirp); /* first real entry */
 322         else
 323                 fprintf(stderr, "Warning: `..' missing from directory %s\n",
 324                         pname);
 325         bpt = rst_telldir(dirp);
 326         /*
 327          * a zero inode signals end of directory
 328          */
 329         while (dp != NULL) {
 330                 locname[namelen] = '\0';
 331                 if (namelen + dp->d_namlen >= (int)sizeof(locname)) {
 332                         fprintf(stderr, "%s%s: name exceeds %ld char\n",
 333                                 locname, dp->d_name, (long)sizeof(locname) - 1);
 334                 } else {
 335                         (void) strncat(locname, dp->d_name, (int)dp->d_namlen);
 336                         treescan(locname, dp->d_ino, todo);
 337                         rst_seekdir(dirp, bpt, itp->t_seekpt);
 338                 }
 339                 dp = rst_readdir(dirp);
 340                 bpt = rst_telldir(dirp);
 341         }
 342 }
 343
 344 /*
 345  * Lookup a pathname which is always assumed to start from the ROOTINO.
 346  */
 347 struct direct *
 348 pathsearch(const char *pathname)
 349 {
 350         dump_ino_t ino;
 351         struct direct *dp;
 352         char *path, *name, buffer[MAXPATHLEN];
 353
 354         strcpy(buffer, pathname);
 355         path = buffer;
 356         ino = ROOTINO;
 357         while (*path == '/')
 358                 path++;
 359         dp = NULL;
 360 #ifdef __linux__
 361         while ((name = strsep(&path, "/")) != NULL && *name /* != NULL */) {
 362 #else
 363         while ((name = strtok_r(NULL, "/", &path)) != NULL && *name /* != NULL */) {
 364 #endif
 365                 if ((dp = searchdir(ino, name)) == NULL)
 366                         return (NULL);
 367                 ino = dp->d_ino;
 368         }
 369         return (dp);
 370 }
 371
 372 /*
 373  * Lookup the requested name in directory inum.
 374  * Return its inode number if found, zero if it does not exist.
 375  */
 376 static struct direct *
 377 searchdir(dump_ino_t inum, char *name)
 378 {
 379         struct direct *dp;
 380         struct inotab *itp;
 381         int len;
 382
 383         itp = inotablookup(inum);
 384         if (itp == NULL)
 385                 return (NULL);
 386         rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 387         len = strlen(name);
 388         do {
 389                 dp = rst_readdir(dirp);
 390                 if (dp == NULL)
 391                         return (NULL);
 392         } while (dp->d_namlen != len || strncmp(dp->d_name, name, len) != 0);
 393         return (dp);
 394 }
 395
 396 /*
 397  * Put the directory entries in the directory file
 398  */
 399 static void
 400 putdir(char *buf, size_t size)
 401 {
 402         struct direct cvtbuf;
 403         struct odirect *odp;
 404         struct odirect *eodp;
 405         struct direct *dp;
 406         long loc, i;
 407
 408         if (cvtflag && !ufs2flag) {
 409                 eodp = (struct odirect *)&buf[size];
 410                 for (odp = (struct odirect *)buf; odp < eodp; odp++)
 411                         if (odp->d_ino != 0) {
 412                                 dcvt(odp, &cvtbuf);
 413                                 putent(&cvtbuf);
 414                         }
 415         } else {
 416                 for (loc = 0; loc < (long)size; ) {
 417                         dp = (struct direct *)(buf + loc);
 418 #ifdef  DIRDEBUG
 419                         printf ("reclen = %d, namlen = %d, type = %d\n",
 420                                 dp->d_reclen, dp->d_namlen, dp->d_type);
 421 #endif
 422                         if (Bcvt)
 423                                 swabst((u_char *)"is", (u_char *) dp);
 424                         if (oldinofmt && dp->d_ino != 0) {
 425 #                               if BYTE_ORDER == BIG_ENDIAN
 426                                         if (Bcvt)
 427                                                 dp->d_namlen = dp->d_type;
 428 #                               else
 429                                         if (!Bcvt)
 430                                                 dp->d_namlen = dp->d_type;
 431 #                               endif
 432                                 if (dp->d_namlen == 0 && dp->d_type != 0)
 433                                         dp->d_namlen = dp->d_type;
 434                                 dp->d_type = DT_UNKNOWN;
 435                         }
 436 #ifdef  DIRDEBUG
 437                         printf ("reclen = %d, namlen = %d, type = %d\n",
 438                                 dp->d_reclen, dp->d_namlen, dp->d_type);
 439 #endif
 440                         i = DIRBLKSIZ - (loc & (DIRBLKSIZ - 1));
 441                         if ((dp->d_reclen & 0x3) != 0 ||
 442                             dp->d_reclen > i ||
 443                             dp->d_reclen < DIRSIZ(0, dp)
 444 #if MAXNAMLEN < 255
 445                             || dp->d_namlen > MAXNAMLEN
 446 #endif
 447                             ) {
 448                                 Vprintf(stdout, "Mangled directory: ");
 449                                 if ((dp->d_reclen & 0x3) != 0)
 450                                         Vprintf(stdout,
 451                                            "reclen not multiple of 4 ");
 452                                 if (dp->d_reclen < DIRSIZ(0, dp))
 453                                         Vprintf(stdout,
 454                                            "reclen less than DIRSIZ (%d < %d) ",
 455                                            dp->d_reclen, DIRSIZ(0, dp));
 456 #if MAXNAMLEN < 255
 457                                 if (dp->d_namlen > MAXNAMLEN)
 458                                         Vprintf(stdout,
 459                                            "reclen name too big (%d > %d) ",
 460                                            dp->d_namlen, MAXNAMLEN);
 461 #endif
 462                                 Vprintf(stdout, "\n");
 463                                 loc += i;
 464                                 continue;
 465                         }
 466                         loc += dp->d_reclen;
 467                         if (dp->d_ino != 0) {
 468                                 putent(dp);
 469                         }
 470                 }
 471         }
 472 }
 473
 474 /*
 475  * These variables are "local" to the following two functions.
 476  */
 477 static char dirbuf[DIRBLKSIZ];
 478 static long dirloc = 0;
 479 static long prev = 0;
 480
 481 /*
 482  * add a new directory entry to a file.
 483  */
 484 static void
 485 putent(struct direct *dp)
 486 {
 487         dp->d_reclen = DIRSIZ(0, dp);
 488         if (dirloc + dp->d_reclen > DIRBLKSIZ) {
 489                 ((struct direct *)(dirbuf + prev))->d_reclen =
 490                     DIRBLKSIZ - prev;
 491                 if ( fwrite(dirbuf, 1, DIRBLKSIZ, df) != DIRBLKSIZ )
 492                         err(1,"cannot write to file %s", dirfile);
 493                 dirloc = 0;
 494         }
 495         memmove(dirbuf + dirloc, dp, (size_t)dp->d_reclen);
 496         prev = dirloc;
 497         dirloc += dp->d_reclen;
 498 }
 499
 500 /*
 501  * flush out a directory that is finished.
 502  */
 503 static void
 504 flushent(void)
 505 {
 506         ((struct direct *)(dirbuf + prev))->d_reclen = DIRBLKSIZ - prev;
 507         if ( fwrite(dirbuf, (int)dirloc, 1, df) != 1 )
 508                 err(1, "cannot write to file %s", dirfile);
 509         seekpt = FTELL(df);
 510         if (seekpt == -1)
 511                 err(1, "cannot write to file %s", dirfile);
 512         dirloc = 0;
 513 }
 514
 515 static void
 516 dcvt(struct odirect *odp, struct direct *ndp)
 517 {
 518
 519         memset(ndp, 0, (size_t)(sizeof *ndp));
 520         ndp->d_ino =  odp->d_ino;
 521         ndp->d_type = DT_UNKNOWN;
 522         (void) strncpy(ndp->d_name, odp->d_name, ODIRSIZ);
 523         ndp->d_namlen = strlen(ndp->d_name);
 524         ndp->d_reclen = DIRSIZ(0, ndp);
 525 }
 526
 527 /*
 528  * Seek to an entry in a directory.
 529  * Only values returned by rst_telldir should be passed to rst_seekdir.
 530  * This routine handles many directories in a single file.
 531  * It takes the base of the directory in the file, plus
 532  * the desired seek offset into it.
 533  */
 534 static void
 535 rst_seekdir(RST_DIR *dirp, OFF_T loc, OFF_T base)
 536 {
 537
 538         if (loc == rst_telldir(dirp))
 539                 return;
 540         loc -= base;
 541         if (loc < 0)
 542                 fprintf(stderr, "bad seek pointer to rst_seekdir %lld\n", (long long int)loc);
 543         (void) LSEEK(dirp->dd_fd, base + (loc & ~(DIRBLKSIZ - 1)), SEEK_SET);
 544         dirp->dd_loc = loc & (DIRBLKSIZ - 1);
 545         if (dirp->dd_loc != 0)
 546                 dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ);
 547 }
 548
 549 /*
 550  * get next entry in a directory.
 551  */
 552 struct direct *
 553 rst_readdir(RST_DIR *dirp)
 554 {
 555         struct direct *dp;
 556
 557         for (;;) {
 558                 if (dirp->dd_loc == 0) {
 559                         dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf,
 560                             DIRBLKSIZ);
 561                         if (dirp->dd_size <= 0) {
 562                                 Dprintf(stderr, "error reading directory\n");
 563                                 return (NULL);
 564                         }
 565                 }
 566                 if (dirp->dd_loc >= dirp->dd_size) {
 567                         dirp->dd_loc = 0;
 568                         continue;
 569                 }
 570                 dp = (struct direct *)(dirp->dd_buf + dirp->dd_loc);
 571                 if (dp->d_reclen == 0 ||
 572                     dp->d_reclen > DIRBLKSIZ + 1 - dirp->dd_loc) {
 573                         Dprintf(stderr, "corrupted directory: bad reclen %d\n",
 574                                 dp->d_reclen);
 575                         return (NULL);
 576                 }
 577                 dirp->dd_loc += dp->d_reclen;
 578                 if (dp->d_ino == 0 && strcmp(dp->d_name, "/") == 0)
 579                         return (NULL);
 580                 if (dp->d_ino >= maxino) {
 581                         Dprintf(stderr, "corrupted directory: bad inum %d\n",
 582                                 dp->d_ino);
 583                         continue;
 584                 }
 585                 return (dp);
 586         }
 587 }
 588
 589 /*
 590  * Simulate the opening of a directory
 591  */
 592 RST_DIR *
 593 rst_opendir(const char *name)
 594 {
 595         struct inotab *itp;
 596         RST_DIR *dirp;
 597         dump_ino_t ino;
 598
 599         if ((ino = dirlookup(name)) > 0 &&
 600             (itp = inotablookup(ino)) != NULL) {
 601                 dirp = opendirfile(dirfile);
 602                 rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 603                 return (dirp);
 604         }
 605         return (NULL);
 606 }
 607
 608 /*
 609  * In our case, there is nothing to do when closing a directory.
 610  */
 611 void
 612 rst_closedir(RST_DIR *dirp)
 613 {
 614
 615         (void)close(dirp->dd_fd);
 616         free(dirp);
 617         return;
 618 }
 619
 620 /*
 621  * Simulate finding the current offset in the directory.
 622  */
 623 static OFF_T
 624 rst_telldir(RST_DIR *dirp)
 625 {
 626         return ((OFF_T)LSEEK(dirp->dd_fd,
 627                 (OFF_T)0, SEEK_CUR) - dirp->dd_size + dirp->dd_loc);
 628 }
 629
 630 /*
 631  * Open a directory file.
 632  */
 633 static RST_DIR *
 634 opendirfile(const char *name)
 635 {
 636         RST_DIR *dirp;
 637         int fd;
 638
 639         if ((fd = OPEN(name, O_RDONLY)) == -1)
 640                 return (NULL);
 641         if ((dirp = malloc(sizeof(RST_DIR))) == NULL) {
 642                 (void)close(fd);
 643                 return (NULL);
 644         }
 645         dirp->dd_fd = fd;
 646         dirp->dd_loc = 0;
 647         return (dirp);
 648 }
 649
 650 /*
 651  * Set the mode, owner, and times for all new or changed directories
 652  */
 653 void
 654 setdirmodes(int flags)
 655 {
 656         FILE *mf;
 657         struct modeinfo node;
 658         struct entry *ep;
 659         char *cp;
 660
 661         Vprintf(stdout, "Set directory mode, owner, and times.\n");
 662         if (command == 'r' || command == 'R')
 663                 (void) snprintf(modefile, sizeof(modefile), "%s/rstmode%lu", tmpdir, (long)dumpdate);
 664         if (modefile[0] == '#') {
 665                 panic("modefile not defined\n");
 666                 fprintf(stderr, "directory mode, owner, and times not set\n");
 667                 return;
 668         }
 669         mf = fopen(modefile, "r");
 670         if (mf == NULL) {
 671                 warn("fopen");
 672                 fprintf(stderr, "cannot open mode file %s\n", modefile);
 673                 fprintf(stderr, "directory mode, owner, and times not set\n");
 674                 return;
 675         }
 676         clearerr(mf);
 677         for (;;) {
 678                 (void) fread((char *)&node, 1, sizeof(struct modeinfo), mf);
 679                 if (feof(mf))
 680                         break;
 681                 ep = lookupino(node.ino);
 682                 if (command == 'i' || command == 'x') {
 683                         if (ep == NULL)
 684                                 continue;
 685                         if ((flags & FORCE) == 0 && ep->e_flags & EXISTED) {
 686                                 ep->e_flags &= ~NEW;
 687                                 continue;
 688                         }
 689                         if ((flags & FORCE) == 0 &&
 690                             node.ino == ROOTINO &&
 691                             reply("set owner/mode for '.'") == FAIL)
 692                                 continue;
 693                 }
 694                 if (ep == NULL) {
 695                         panic("cannot find directory inode %d\n", node.ino);
 696                 } else {
 697                         cp = myname(ep);
 698                         (void) chown(cp, node.uid, node.gid);
 699                         (void) chmod(cp, node.mode);
 700                         if (node.flags)
 701 #ifdef  __linux__
 702                                 (void) lsetflags(cp, node.flags);
 703 #else
 704 #ifdef sunos
 705 #else
 706                                 (void) chflags(cp, node.flags);
 707 #endif
 708 #endif
 709                         utimes(cp, node.timep);
 710                         ep->e_flags &= ~NEW;
 711                 }
 712         }
 713         if (ferror(mf))
 714                 panic("error setting directory modes\n");
 715         (void) fclose(mf);
 716 }
 717
 718 /*
 719  * In restore -C mode, tests the attributes for all directories
 720  */
 721 void
 722 comparedirmodes(void)
 723 {
 724         FILE *mf;
 725         struct modeinfo node;
 726         struct entry *ep;
 727         char *cp;
 728
 729         Vprintf(stdout, "Compare directories modes, owner, attributes.\n");
 730         if (modefile[0] == '#') {
 731                 panic("modefile not defined\n");
 732                 fprintf(stderr, "directory mode, owner, and times not set\n");
 733                 return;
 734         }
 735         mf = fopen(modefile, "r");
 736         if (mf == NULL) {
 737                 warn("fopen");
 738                 fprintf(stderr, "cannot open mode file %s\n", modefile);
 739                 fprintf(stderr, "directory mode, owner, and times not set\n");
 740                 return;
 741         }
 742         clearerr(mf);
 743         for (;;) {
 744                 (void) fread((char *)&node, 1, sizeof(struct modeinfo), mf);
 745                 if (feof(mf))
 746                         break;
 747                 ep = lookupino(node.ino);
 748                 if (ep == NULL) {
 749                         panic("cannot find directory inode %d\n", node.ino);
 750                 } else {
 751                         cp = myname(ep);
 752                         struct STAT sb;
 753                         unsigned long newflags;
 754
 755                         if (LSTAT(cp, &sb) < 0) {
 756                                 warn("%s: does not exist", cp);
 757                                 do_compare_error;
 758                                 continue;
 759                         }
 760
 761                         Vprintf(stdout, "comparing directory %s\n", cp);
 762
 763                         if (sb.st_mode != node.mode) {
 764                                 fprintf(stderr, "%s: mode changed from 0%o to 0%o.\n",
 765                                         cp, node.mode & 07777, sb.st_mode & 07777);
 766                                 do_compare_error;
 767                         }
 768                         if (sb.st_uid != node.uid) {
 769                                 fprintf(stderr, "%s: uid changed from %d to %d.\n",
 770                                         cp, node.uid, sb.st_uid);
 771                                 do_compare_error;
 772                         }
 773                         if (sb.st_gid != node.gid) {
 774                                 fprintf(stderr, "%s: gid changed from %d to %d.\n",
 775                                         cp, node.gid, sb.st_gid);
 776                                 do_compare_error;
 777                         }
 778 #ifdef  __linux__
 779                         if (lgetflags(cp, &newflags) < 0) {
 780                                 if (node.flags != 0) {
 781                                         warn("%s: lgetflags failed", cp);
 782                                         do_compare_error;
 783                                 }
 784                         }
 785                         else {
 786                                 if (newflags != node.flags) {
 787                                         fprintf(stderr, "%s: flags changed from 0x%08x to 0x%08lx.\n",
 788                                                 cp, node.flags, newflags);
 789                                         do_compare_error;
 790                                 }
 791                         }
 792 #endif
 793                         ep->e_flags &= ~NEW;
 794                 }
 795         }
 796         if (ferror(mf))
 797                 panic("error setting directory modes\n");
 798         (void) fclose(mf);
 799 }
 800
 801 /*
 802  * Generate a literal copy of a directory.
 803  */
 804 int
 805 genliteraldir(char *name, dump_ino_t ino)
 806 {
 807         struct inotab *itp;
 808         int ofile, dp, i, size;
 809         char buf[BUFSIZ];
 810
 811         itp = inotablookup(ino);
 812         if (itp == NULL)
 813                 panic("Cannot find directory inode %d named %s\n", ino, name);
 814         if ((ofile = open(name, O_WRONLY | O_CREAT | O_TRUNC, 0666)) < 0) {
 815                 warn("%s: cannot create file\n", name);
 816                 return (FAIL);
 817         }
 818         rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 819         dp = dup(dirp->dd_fd);
 820         for (i = itp->t_size; i > 0; i -= BUFSIZ) {
 821                 size = i < BUFSIZ ? i : BUFSIZ;
 822                 if (read(dp, buf, (int) size) == -1) {
 823                         warnx("write error extracting inode %lu, name %s\n",
 824                                 (unsigned long)curfile.ino, curfile.name);
 825                         err(1, "read");
 826                 }
 827                 if (!Nflag && write(ofile, buf, (int) size) == -1) {
 828                         warnx("write error extracting inode %lu, name %s\n",
 829                                 (unsigned long)curfile.ino, curfile.name);
 830                         err(1, "write");
 831                 }
 832         }
 833         (void) close(dp);
 834         (void) close(ofile);
 835         return (GOOD);
 836 }
 837
 838 /*
 839  * Determine the type of an inode
 840  */
 841 int
 842 inodetype(dump_ino_t ino)
 843 {
 844         struct inotab *itp;
 845
 846         itp = inotablookup(ino);
 847         if (itp == NULL)
 848                 return (LEAF);
 849         return (NODE);
 850 }
 851
 852 /*
 853  * Allocate and initialize a directory inode entry.
 854  * If requested, save its pertinent mode, owner, and time info.
 855  */
 856 static struct inotab *
 857 #if defined(__linux__) || defined(sunos)
 858 allocinotab(dump_ino_t ino, OFF_T seekpt)
 859 #else
 860 allocinotab(dump_ino_t ino, OFF_T seekpt)
 861 #endif
 862 {
 863         struct inotab   *itp;
 864
 865         itp = calloc(1, sizeof(struct inotab));
 866         if (itp == NULL)
 867                 panic("no memory directory table\n");
 868         itp->t_next = inotab[INOHASH(ino)];
 869         inotab[INOHASH(ino)] = itp;
 870         itp->t_ino = ino;
 871         itp->t_seekpt = seekpt;
 872         return itp;
 873 }
 874
 875 static void
 876 #if defined(__linux__) || defined(sunos)
 877 savemodeinfo(dump_ino_t ino, struct new_bsd_inode *dip) {
 878 #else
 879 savemodeinfo(dump_ino_t ino, struct dinode *dip) {
 880 #endif
 881         struct modeinfo node;
 882
 883         if (mf == NULL)
 884                 return;
 885         node.ino = ino;
 886 #if defined(__linux__) || defined(sunos)
 887         node.timep[0].tv_sec = dip->di_atime.tv_sec;
 888         node.timep[0].tv_usec = dip->di_atime.tv_usec;
 889         node.timep[1].tv_sec = dip->di_mtime.tv_sec;
 890         node.timep[1].tv_usec = dip->di_mtime.tv_usec;
 891 #else   /* __linux__  || sunos */
 892         node.timep[0].tv_sec = dip->di_atime;
 893         node.timep[0].tv_usec = dip->di_atimensec / 1000;
 894         node.timep[1].tv_sec = dip->di_mtime;
 895         node.timep[1].tv_usec = dip->di_mtimensec / 1000;
 896 #endif  /* __linux__  || sunos */
 897         node.mode = dip->di_mode;
 898         node.flags = dip->di_flags;
 899         node.uid = dip->di_uid;
 900         node.gid = dip->di_gid;
 901         if ( fwrite((char *)&node, 1, sizeof(struct modeinfo), mf) != sizeof(struct modeinfo) )
 902                 err(1,"cannot write to file %s", modefile);
 903 }
 904
 905 /*
 906  * Look up an inode in the table of directories
 907  */
 908 static struct inotab *
 909 inotablookup(dump_ino_t ino)
 910 {
 911         struct inotab *itp;
 912
 913         for (itp = inotab[INOHASH(ino)]; itp != NULL; itp = itp->t_next)
 914                 if (itp->t_ino == ino)
 915                         return (itp);
 916         return (NULL);
 917 }
 918
 919 /*
 920  * Clean up and exit
 921  */
 922 void
 923 cleanup(void)
 924 {
 925         closemt();
 926         if (modefile[0] != '#')
 927                 (void) unlink(modefile);
 928         if (dirfile[0] != '#')
 929                 (void) unlink(dirfile);
 930 }