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. All advertising materials mentioning features or use of this software
  27  *    must display the following acknowledgement:
  28  *      This product includes software developed by the University of
  29  *      California, Berkeley and its contributors.
  30  * 4. Neither the name of the University nor the names of its contributors
  31  *    may be used to endorse or promote products derived from this software
  32  *    without specific prior written permission.
  33  *
  34  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  35  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  36  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  37  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  38  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  39  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  40  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  41  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  42  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  43  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  44  * SUCH DAMAGE.
  45  */
  46
  47 #ifndef lint
  48 static const char rcsid[] =
  49         "$Id: dirs.c,v 1.17 2002/01/25 15:08:59 stelian Exp $";
  50 #endif /* not lint */
  51
  52 #include <config.h>
  53 #include <sys/param.h>
  54 #include <sys/file.h>
  55 #include <sys/stat.h>
  56
  57 #ifdef  __linux__
  58 #ifdef HAVE_EXT2FS_EXT2_FS_H
  59 #include <ext2fs/ext2_fs.h>
  60 #else
  61 #include <linux/ext2_fs.h>
  62 #endif
  63 #include <bsdcompat.h>
  64 #else   /* __linux__ */
  65 #include <ufs/ufs/dinode.h>
  66 #include <ufs/ufs/dir.h>
  67 #endif  /* __linux__ */
  68 #include <protocols/dumprestore.h>
  69
  70 #include <compaterr.h>
  71 #include <errno.h>
  72 #include <stdio.h>
  73 #include <stdlib.h>
  74 #include <string.h>
  75 #include <unistd.h>
  76
  77 #ifdef  __linux__
  78 #include <endian.h>
  79 #else
  80 #include <machine/endian.h>
  81 #endif
  82
  83 #include "pathnames.h"
  84 #include "restore.h"
  85 #include "extern.h"
  86
  87 /*
  88  * Symbol table of directories read from tape.
  89  */
  90 #define HASHSIZE        1000
  91 #define INOHASH(val) (val % HASHSIZE)
  92 struct inotab {
  93         struct  inotab *t_next;
  94         dump_ino_t t_ino;
  95         int32_t t_seekpt;
  96         int32_t t_size;
  97 };
  98 static struct inotab *inotab[HASHSIZE];
  99
 100 /*
 101  * Information retained about directories.
 102  */
 103 struct modeinfo {
 104         dump_ino_t ino;
 105         struct timeval timep[2];
 106         mode_t mode;
 107         uid_t uid;
 108         gid_t gid;
 109         unsigned int flags;
 110 };
 111
 112 /*
 113  * Definitions for library routines operating on directories.
 114  */
 115 #undef DIRBLKSIZ
 116 #define DIRBLKSIZ 1024
 117 struct rstdirdesc {
 118         int     dd_fd;
 119         int32_t dd_loc;
 120         int32_t dd_size;
 121         char    dd_buf[DIRBLKSIZ];
 122 };
 123
 124 /*
 125  * Global variables for this file.
 126  */
 127 static long     seekpt;
 128 static FILE     *df, *mf;
 129 static RST_DIR  *dirp;
 130 static char     dirfile[MAXPATHLEN] = "#";      /* No file */
 131 static char     modefile[MAXPATHLEN] = "#";     /* No file */
 132 static char     dot[2] = ".";                   /* So it can be modified */
 133
 134 /*
 135  * Format of old style directories.
 136  */
 137 #define ODIRSIZ 14
 138 struct odirect {
 139         u_short d_ino;
 140         char    d_name[ODIRSIZ];
 141 };
 142
 143 #ifdef  __linux__
 144 static struct inotab    *allocinotab __P((dump_ino_t, struct new_bsd_inode *, long));
 145 #else
 146 static struct inotab    *allocinotab __P((dump_ino_t, struct dinode *, long));
 147 #endif
 148 static void              dcvt __P((struct odirect *, struct direct *));
 149 static void              flushent __P((void));
 150 static struct inotab    *inotablookup __P((dump_ino_t));
 151 static RST_DIR          *opendirfile __P((const char *));
 152 static void              putdir __P((char *, size_t));
 153 static void              putent __P((struct direct *));
 154 static void              rst_seekdir __P((RST_DIR *, long, long));
 155 static long              rst_telldir __P((RST_DIR *));
 156 static struct direct    *searchdir __P((dump_ino_t, char *));
 157
 158 /*
 159  *      Extract directory contents, building up a directory structure
 160  *      on disk for extraction by name.
 161  *      If genmode is requested, save mode, owner, and times for all
 162  *      directories on the tape.
 163  */
 164 void
 165 extractdirs(int genmode)
 166 {
 167         int i;
 168 #ifdef  __linux__
 169         struct new_bsd_inode *ip;
 170 #else
 171         struct dinode *ip;
 172 #endif
 173         struct inotab *itp;
 174         struct direct nulldir;
 175         int fd;
 176
 177         Vprintf(stdout, "Extract directories from tape\n");
 178         (void) snprintf(dirfile, sizeof(dirfile), "%s/rstdir%ld", tmpdir,
 179                 (long)dumpdate);
 180         if (command != 'r' && command != 'R') {
 181                 (void) strncat(dirfile, "-XXXXXX",
 182                         sizeof(dirfile) - strlen(dirfile));
 183                 fd = mkstemp(dirfile);
 184         } else
 185                 fd = open(dirfile, O_RDWR|O_CREAT|O_EXCL, 0666);
 186         if (fd == -1 || (df = fdopen(fd, "w")) == NULL) {
 187                 if (fd != -1)
 188                         close(fd);
 189                 err(1, "cannot create directory temporary %s", dirfile);
 190         }
 191         if (genmode != 0) {
 192                 (void) snprintf(modefile, sizeof(modefile), "%s/rstmode%ld", tmpdir, (long)dumpdate);
 193                 if (command != 'r' && command != 'R') {
 194                         (void) strncat(modefile, "-XXXXXX",
 195                                 sizeof(modefile) - strlen(modefile));
 196                         fd = mkstemp(modefile);
 197                 } else
 198                         fd = open(modefile, O_RDWR|O_CREAT|O_EXCL, 0666);
 199                 if (fd == -1 || (mf = fdopen(fd, "w")) == NULL) {
 200                         if (fd != -1)
 201                                 close(fd);
 202                         err(1, "cannot create modefile %s", modefile);
 203                 }
 204         }
 205         nulldir.d_ino = 0;
 206         nulldir.d_type = DT_DIR;
 207         nulldir.d_namlen = 1;
 208         nulldir.d_name[0] = '/';
 209         nulldir.d_name[1] = '\0';
 210         nulldir.d_reclen = DIRSIZ(0, &nulldir);
 211         for (;;) {
 212                 curfile.name = "<directory file - name unknown>";
 213                 curfile.action = USING;
 214                 ip = curfile.dip;
 215                 if (ip == NULL || (ip->di_mode & IFMT) != IFDIR) {
 216                         if ( fclose(df) == EOF )
 217                                 err(1, "cannot write to file %s", dirfile);
 218                         dirp = opendirfile(dirfile);
 219                         if (dirp == NULL)
 220                                 warn("opendirfile");
 221                         if (mf != NULL && fclose(mf) == EOF )
 222                                 err(1, "cannot write to file %s", dirfile);
 223                         i = dirlookup(dot);
 224                         if (i == 0)
 225                                 panic("Root directory is not on tape\n");
 226                         return;
 227                 }
 228                 itp = allocinotab(curfile.ino, ip, seekpt);
 229                 getfile(putdir, xtrnull);
 230                 putent(&nulldir);
 231                 flushent();
 232                 itp->t_size = seekpt - itp->t_seekpt;
 233         }
 234 }
 235
 236 /*
 237  * skip over all the directories on the tape
 238  */
 239 void
 240 skipdirs(void)
 241 {
 242
 243         while (curfile.dip && (curfile.dip->di_mode & IFMT) == IFDIR) {
 244                 skipfile();
 245         }
 246 }
 247
 248 /*
 249  *      Recursively find names and inumbers of all files in subtree
 250  *      pname and pass them off to be processed.
 251  */
 252 void
 253 treescan(char *pname, dump_ino_t ino, long (*todo) __P((char *, dump_ino_t, int)))
 254 {
 255         struct inotab *itp;
 256         struct direct *dp;
 257         int namelen;
 258         long bpt;
 259         char locname[MAXPATHLEN + 1];
 260
 261         itp = inotablookup(ino);
 262         if (itp == NULL) {
 263                 /*
 264                  * Pname is name of a simple file or an unchanged directory.
 265                  */
 266                 (void) (*todo)(pname, ino, LEAF);
 267                 return;
 268         }
 269         /*
 270          * Pname is a dumped directory name.
 271          */
 272         if ((*todo)(pname, ino, NODE) == FAIL)
 273                 return;
 274         /*
 275          * begin search through the directory
 276          * skipping over "." and ".."
 277          */
 278         namelen = snprintf(locname, sizeof(locname), "%s/", pname);
 279         if (namelen >= sizeof(locname))
 280                 namelen = sizeof(locname) - 1;
 281         rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 282         dp = rst_readdir(dirp); /* "." */
 283         if (dp != NULL && strcmp(dp->d_name, ".") == 0)
 284                 dp = rst_readdir(dirp); /* ".." */
 285         else
 286                 fprintf(stderr, "Warning: `.' missing from directory %s\n",
 287                         pname);
 288         if (dp != NULL && strcmp(dp->d_name, "..") == 0)
 289                 dp = rst_readdir(dirp); /* first real entry */
 290         else
 291                 fprintf(stderr, "Warning: `..' missing from directory %s\n",
 292                         pname);
 293         bpt = rst_telldir(dirp);
 294         /*
 295          * a zero inode signals end of directory
 296          */
 297         while (dp != NULL) {
 298                 locname[namelen] = '\0';
 299                 if (namelen + dp->d_namlen >= sizeof(locname)) {
 300                         fprintf(stderr, "%s%s: name exceeds %ld char\n",
 301                                 locname, dp->d_name, (long)sizeof(locname) - 1);
 302                 } else {
 303                         (void) strncat(locname, dp->d_name, (int)dp->d_namlen);
 304                         treescan(locname, dp->d_ino, todo);
 305                         rst_seekdir(dirp, bpt, itp->t_seekpt);
 306                 }
 307                 dp = rst_readdir(dirp);
 308                 bpt = rst_telldir(dirp);
 309         }
 310 }
 311
 312 /*
 313  * Lookup a pathname which is always assumed to start from the ROOTINO.
 314  */
 315 struct direct *
 316 pathsearch(const char *pathname)
 317 {
 318         dump_ino_t ino;
 319         struct direct *dp;
 320         char *path, *name, buffer[MAXPATHLEN];
 321
 322         strcpy(buffer, pathname);
 323         path = buffer;
 324         ino = ROOTINO;
 325         while (*path == '/')
 326                 path++;
 327         dp = NULL;
 328         while ((name = strsep(&path, "/")) != NULL && *name /* != NULL */) {
 329                 if ((dp = searchdir(ino, name)) == NULL)
 330                         return (NULL);
 331                 ino = dp->d_ino;
 332         }
 333         return (dp);
 334 }
 335
 336 /*
 337  * Lookup the requested name in directory inum.
 338  * Return its inode number if found, zero if it does not exist.
 339  */
 340 static struct direct *
 341 searchdir(dump_ino_t inum, char *name)
 342 {
 343         struct direct *dp;
 344         struct inotab *itp;
 345         int len;
 346
 347         itp = inotablookup(inum);
 348         if (itp == NULL)
 349                 return (NULL);
 350         rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 351         len = strlen(name);
 352         do {
 353                 dp = rst_readdir(dirp);
 354                 if (dp == NULL)
 355                         return (NULL);
 356         } while (dp->d_namlen != len || strncmp(dp->d_name, name, len) != 0);
 357         return (dp);
 358 }
 359
 360 /*
 361  * Put the directory entries in the directory file
 362  */
 363 static void
 364 putdir(char *buf, size_t size)
 365 {
 366         struct direct cvtbuf;
 367         struct odirect *odp;
 368         struct odirect *eodp;
 369         struct direct *dp;
 370         long loc, i;
 371
 372         if (cvtflag) {
 373                 eodp = (struct odirect *)&buf[size];
 374                 for (odp = (struct odirect *)buf; odp < eodp; odp++)
 375                         if (odp->d_ino != 0) {
 376                                 dcvt(odp, &cvtbuf);
 377                                 putent(&cvtbuf);
 378                         }
 379         } else {
 380                 for (loc = 0; loc < size; ) {
 381                         dp = (struct direct *)(buf + loc);
 382 #ifdef  DIRDEBUG
 383                         printf ("reclen = %d, namlen = %d, type = %d\n",
 384                                 dp->d_reclen, dp->d_namlen, dp->d_type);
 385 #endif
 386                         if (Bcvt)
 387                                 swabst((u_char *)"is", (u_char *) dp);
 388                         if (oldinofmt && dp->d_ino != 0) {
 389 #                               if BYTE_ORDER == BIG_ENDIAN
 390                                         if (Bcvt)
 391                                                 dp->d_namlen = dp->d_type;
 392 #                               else
 393                                         if (!Bcvt)
 394                                                 dp->d_namlen = dp->d_type;
 395 #                               endif
 396                                 dp->d_type = DT_UNKNOWN;
 397                         }
 398 #ifdef  DIRDEBUG
 399                         printf ("reclen = %d, namlen = %d, type = %d\n",
 400                                 dp->d_reclen, dp->d_namlen, dp->d_type);
 401 #endif
 402                         i = DIRBLKSIZ - (loc & (DIRBLKSIZ - 1));
 403                         if ((dp->d_reclen & 0x3) != 0 ||
 404                             dp->d_reclen > i ||
 405                             dp->d_reclen < DIRSIZ(0, dp) ||
 406                             dp->d_namlen > MAXNAMLEN) {
 407                                 Vprintf(stdout, "Mangled directory: ");
 408                                 if ((dp->d_reclen & 0x3) != 0)
 409                                         Vprintf(stdout,
 410                                            "reclen not multiple of 4 ");
 411                                 if (dp->d_reclen < DIRSIZ(0, dp))
 412                                         Vprintf(stdout,
 413                                            "reclen less than DIRSIZ (%d < %d) ",
 414                                            dp->d_reclen, DIRSIZ(0, dp));
 415                                 if (dp->d_namlen > MAXNAMLEN)
 416                                         Vprintf(stdout,
 417                                            "reclen name too big (%d > %d) ",
 418                                            dp->d_namlen, MAXNAMLEN);
 419                                 Vprintf(stdout, "\n");
 420                                 loc += i;
 421                                 continue;
 422                         }
 423                         loc += dp->d_reclen;
 424                         if (dp->d_ino != 0) {
 425                                 putent(dp);
 426                         }
 427                 }
 428         }
 429 }
 430
 431 /*
 432  * These variables are "local" to the following two functions.
 433  */
 434 char dirbuf[DIRBLKSIZ];
 435 long dirloc = 0;
 436 long prev = 0;
 437
 438 /*
 439  * add a new directory entry to a file.
 440  */
 441 static void
 442 putent(struct direct *dp)
 443 {
 444         dp->d_reclen = DIRSIZ(0, dp);
 445         if (dirloc + dp->d_reclen > DIRBLKSIZ) {
 446                 ((struct direct *)(dirbuf + prev))->d_reclen =
 447                     DIRBLKSIZ - prev;
 448                 if ( fwrite(dirbuf, 1, DIRBLKSIZ, df) != DIRBLKSIZ )
 449                         err(1,"cannot write to file %s", dirfile);
 450                 dirloc = 0;
 451         }
 452         memmove(dirbuf + dirloc, dp, (size_t)dp->d_reclen);
 453         prev = dirloc;
 454         dirloc += dp->d_reclen;
 455 }
 456
 457 /*
 458  * flush out a directory that is finished.
 459  */
 460 static void
 461 flushent(void)
 462 {
 463         ((struct direct *)(dirbuf + prev))->d_reclen = DIRBLKSIZ - prev;
 464         if ( fwrite(dirbuf, (int)dirloc, 1, df) != 1 )
 465                 err(1, "cannot write to file %s", dirfile);
 466         seekpt = ftell(df);
 467         if (seekpt == -1)
 468                 err(1, "cannot write to file %s", dirfile);
 469         dirloc = 0;
 470 }
 471
 472 static void
 473 dcvt(struct odirect *odp, struct direct *ndp)
 474 {
 475
 476         memset(ndp, 0, (size_t)(sizeof *ndp));
 477         ndp->d_ino =  odp->d_ino;
 478         ndp->d_type = DT_UNKNOWN;
 479         (void) strncpy(ndp->d_name, odp->d_name, ODIRSIZ);
 480         ndp->d_namlen = strlen(ndp->d_name);
 481         ndp->d_reclen = DIRSIZ(0, ndp);
 482 }
 483
 484 /*
 485  * Seek to an entry in a directory.
 486  * Only values returned by rst_telldir should be passed to rst_seekdir.
 487  * This routine handles many directories in a single file.
 488  * It takes the base of the directory in the file, plus
 489  * the desired seek offset into it.
 490  */
 491 static void
 492 rst_seekdir(RST_DIR *dirp, long loc, long base)
 493 {
 494
 495         if (loc == rst_telldir(dirp))
 496                 return;
 497         loc -= base;
 498         if (loc < 0)
 499                 fprintf(stderr, "bad seek pointer to rst_seekdir %ld\n", loc);
 500         (void) lseek(dirp->dd_fd, base + (loc & ~(DIRBLKSIZ - 1)), SEEK_SET);
 501         dirp->dd_loc = loc & (DIRBLKSIZ - 1);
 502         if (dirp->dd_loc != 0)
 503                 dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ);
 504 }
 505
 506 /*
 507  * get next entry in a directory.
 508  */
 509 struct direct *
 510 rst_readdir(RST_DIR *dirp)
 511 {
 512         struct direct *dp;
 513
 514         for (;;) {
 515                 if (dirp->dd_loc == 0) {
 516                         dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf,
 517                             DIRBLKSIZ);
 518                         if (dirp->dd_size <= 0) {
 519                                 Dprintf(stderr, "error reading directory\n");
 520                                 return (NULL);
 521                         }
 522                 }
 523                 if (dirp->dd_loc >= dirp->dd_size) {
 524                         dirp->dd_loc = 0;
 525                         continue;
 526                 }
 527                 dp = (struct direct *)(dirp->dd_buf + dirp->dd_loc);
 528                 if (dp->d_reclen == 0 ||
 529                     dp->d_reclen > DIRBLKSIZ + 1 - dirp->dd_loc) {
 530                         Dprintf(stderr, "corrupted directory: bad reclen %d\n",
 531                                 dp->d_reclen);
 532                         return (NULL);
 533                 }
 534                 dirp->dd_loc += dp->d_reclen;
 535                 if (dp->d_ino == 0 && strcmp(dp->d_name, "/") == 0)
 536                         return (NULL);
 537                 if (dp->d_ino >= maxino) {
 538                         Dprintf(stderr, "corrupted directory: bad inum %d\n",
 539                                 dp->d_ino);
 540                         continue;
 541                 }
 542                 return (dp);
 543         }
 544 }
 545
 546 /*
 547  * Simulate the opening of a directory
 548  */
 549 RST_DIR *
 550 rst_opendir(const char *name)
 551 {
 552         struct inotab *itp;
 553         RST_DIR *dirp;
 554         dump_ino_t ino;
 555
 556         if ((ino = dirlookup(name)) > 0 &&
 557             (itp = inotablookup(ino)) != NULL) {
 558                 dirp = opendirfile(dirfile);
 559                 rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 560                 return (dirp);
 561         }
 562         return (NULL);
 563 }
 564
 565 /*
 566  * In our case, there is nothing to do when closing a directory.
 567  */
 568 void
 569 rst_closedir(RST_DIR *dirp)
 570 {
 571
 572         (void)close(dirp->dd_fd);
 573         free(dirp);
 574         return;
 575 }
 576
 577 /*
 578  * Simulate finding the current offset in the directory.
 579  */
 580 static long
 581 rst_telldir(RST_DIR *dirp)
 582 {
 583         return ((long)lseek(dirp->dd_fd,
 584             (off_t)0, SEEK_CUR) - dirp->dd_size + dirp->dd_loc);
 585 }
 586
 587 /*
 588  * Open a directory file.
 589  */
 590 static RST_DIR *
 591 opendirfile(const char *name)
 592 {
 593         RST_DIR *dirp;
 594         int fd;
 595
 596         if ((fd = open(name, O_RDONLY)) == -1)
 597                 return (NULL);
 598         if ((dirp = malloc(sizeof(RST_DIR))) == NULL) {
 599                 (void)close(fd);
 600                 return (NULL);
 601         }
 602         dirp->dd_fd = fd;
 603         dirp->dd_loc = 0;
 604         return (dirp);
 605 }
 606
 607 /*
 608  * Set the mode, owner, and times for all new or changed directories
 609  */
 610 void
 611 setdirmodes(int flags)
 612 {
 613         FILE *mf;
 614         struct modeinfo node;
 615         struct entry *ep;
 616         char *cp;
 617
 618         Vprintf(stdout, "Set directory mode, owner, and times.\n");
 619         if (command == 'r' || command == 'R')
 620                 (void) snprintf(modefile, sizeof(modefile), "%s/rstmode%lu", tmpdir, (long)dumpdate);
 621         if (modefile[0] == '#') {
 622                 panic("modefile not defined\n");
 623                 fprintf(stderr, "directory mode, owner, and times not set\n");
 624                 return;
 625         }
 626         mf = fopen(modefile, "r");
 627         if (mf == NULL) {
 628                 warn("fopen");
 629                 fprintf(stderr, "cannot open mode file %s\n", modefile);
 630                 fprintf(stderr, "directory mode, owner, and times not set\n");
 631                 return;
 632         }
 633         clearerr(mf);
 634         for (;;) {
 635                 (void) fread((char *)&node, 1, sizeof(struct modeinfo), mf);
 636                 if (feof(mf))
 637                         break;
 638                 ep = lookupino(node.ino);
 639                 if (command == 'i' || command == 'x') {
 640                         if (ep == NULL)
 641                                 continue;
 642                         if ((flags & FORCE) == 0 && ep->e_flags & EXISTED) {
 643                                 ep->e_flags &= ~NEW;
 644                                 continue;
 645                         }
 646                         if (node.ino == ROOTINO &&
 647                             reply("set owner/mode for '.'") == FAIL)
 648                                 continue;
 649                 }
 650                 if (ep == NULL) {
 651                         panic("cannot find directory inode %d\n", node.ino);
 652                 } else {
 653                         cp = myname(ep);
 654                         (void) chown(cp, node.uid, node.gid);
 655                         (void) chmod(cp, node.mode);
 656                         if (node.flags)
 657 #ifdef  __linux__
 658                                 (void) fsetflags(cp, node.flags);
 659 #else
 660                                 (void) chflags(cp, node.flags);
 661 #endif
 662                         utimes(cp, node.timep);
 663                         ep->e_flags &= ~NEW;
 664                 }
 665         }
 666         if (ferror(mf))
 667                 panic("error setting directory modes\n");
 668         (void) fclose(mf);
 669 }
 670
 671 /*
 672  * Generate a literal copy of a directory.
 673  */
 674 int
 675 genliteraldir(char *name, dump_ino_t ino)
 676 {
 677         struct inotab *itp;
 678         int ofile, dp, i, size;
 679         char buf[BUFSIZ];
 680
 681         itp = inotablookup(ino);
 682         if (itp == NULL)
 683                 panic("Cannot find directory inode %d named %s\n", ino, name);
 684         if ((ofile = open(name, O_WRONLY | O_CREAT | O_TRUNC, 0666)) < 0) {
 685                 warn("%s: cannot create file\n", name);
 686                 return (FAIL);
 687         }
 688         rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 689         dp = dup(dirp->dd_fd);
 690         for (i = itp->t_size; i > 0; i -= BUFSIZ) {
 691                 size = i < BUFSIZ ? i : BUFSIZ;
 692                 if (read(dp, buf, (int) size) == -1) {
 693                         warnx("write error extracting inode %lu, name %s\n",
 694                                 (unsigned long)curfile.ino, curfile.name);
 695                         err(1, "read");
 696                 }
 697                 if (!Nflag && write(ofile, buf, (int) size) == -1) {
 698                         warnx("write error extracting inode %lu, name %s\n",
 699                                 (unsigned long)curfile.ino, curfile.name);
 700                         err(1, "write");
 701                 }
 702         }
 703         (void) close(dp);
 704         (void) close(ofile);
 705         return (GOOD);
 706 }
 707
 708 /*
 709  * Determine the type of an inode
 710  */
 711 int
 712 inodetype(dump_ino_t ino)
 713 {
 714         struct inotab *itp;
 715
 716         itp = inotablookup(ino);
 717         if (itp == NULL)
 718                 return (LEAF);
 719         return (NODE);
 720 }
 721
 722 /*
 723  * Allocate and initialize a directory inode entry.
 724  * If requested, save its pertinent mode, owner, and time info.
 725  */
 726 static struct inotab *
 727 #ifdef  __linux__
 728 allocinotab(dump_ino_t ino, struct new_bsd_inode *dip, long seekpt)
 729 #else
 730 allocinotab(dump_ino_t ino, struct dinode *dip, long seekpt)
 731 #endif
 732 {
 733         struct inotab   *itp;
 734         struct modeinfo node;
 735
 736         itp = calloc(1, sizeof(struct inotab));
 737         if (itp == NULL)
 738                 panic("no memory directory table\n");
 739         itp->t_next = inotab[INOHASH(ino)];
 740         inotab[INOHASH(ino)] = itp;
 741         itp->t_ino = ino;
 742         itp->t_seekpt = seekpt;
 743         if (mf == NULL)
 744                 return (itp);
 745         node.ino = ino;
 746 #ifdef  __linux__
 747         node.timep[0].tv_sec = dip->di_atime.tv_sec;
 748         node.timep[0].tv_usec = dip->di_atime.tv_usec;
 749         node.timep[1].tv_sec = dip->di_mtime.tv_sec;
 750         node.timep[1].tv_usec = dip->di_mtime.tv_usec;
 751 #else   /* __linux__ */
 752         node.timep[0].tv_sec = dip->di_atime;
 753         node.timep[0].tv_usec = dip->di_atimensec / 1000;
 754         node.timep[1].tv_sec = dip->di_mtime;
 755         node.timep[1].tv_usec = dip->di_mtimensec / 1000;
 756 #endif  /* __linux__ */
 757         node.mode = dip->di_mode;
 758         node.flags = dip->di_flags;
 759         node.uid = dip->di_uid;
 760         node.gid = dip->di_gid;
 761         if ( fwrite((char *)&node, 1, sizeof(struct modeinfo), mf) != sizeof(struct modeinfo) )
 762                 err(1,"cannot write to file %s", modefile);
 763         return (itp);
 764 }
 765
 766 /*
 767  * Look up an inode in the table of directories
 768  */
 769 static struct inotab *
 770 inotablookup(dump_ino_t ino)
 771 {
 772         struct inotab *itp;
 773
 774         for (itp = inotab[INOHASH(ino)]; itp != NULL; itp = itp->t_next)
 775                 if (itp->t_ino == ino)
 776                         return (itp);
 777         return (NULL);
 778 }
 779
 780 /*
 781  * Clean up and exit
 782  */
 783 void
 784 cleanup(void)
 785 {
 786         closemt();
 787         if (modefile[0] != '#')
 788                 (void) unlink(modefile);
 789         if (dirfile[0] != '#')
 790                 (void) unlink(dirfile);
 791 }