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 1.23 2003/03/30 15:40:38 stelian Exp $";
  46 #endif /* not lint */
  47
  48 #include <config.h>
  49 #include <sys/param.h>
  50 #include <sys/file.h>
  51 #include <sys/stat.h>
  52
  53 #ifdef  __linux__
  54 #ifdef HAVE_EXT2FS_EXT2_FS_H
  55 #include <ext2fs/ext2_fs.h>
  56 #else
  57 #include <linux/ext2_fs.h>
  58 #endif
  59 #include <bsdcompat.h>
  60 #else   /* __linux__ */
  61 #include <ufs/ufs/dinode.h>
  62 #include <ufs/ufs/dir.h>
  63 #endif  /* __linux__ */
  64 #include <protocols/dumprestore.h>
  65
  66 #include <compaterr.h>
  67 #include <errno.h>
  68 #include <stdio.h>
  69 #include <stdlib.h>
  70 #include <string.h>
  71 #include <unistd.h>
  72
  73 #ifdef  __linux__
  74 #include <endian.h>
  75 #else
  76 #include <machine/endian.h>
  77 #endif
  78
  79 #include "pathnames.h"
  80 #include "restore.h"
  81 #include "extern.h"
  82
  83 /*
  84  * Symbol table of directories read from tape.
  85  */
  86 #define HASHSIZE        1000
  87 #define INOHASH(val) (val % HASHSIZE)
  88 struct inotab {
  89         struct  inotab *t_next;
  90         dump_ino_t t_ino;
  91         int32_t t_seekpt;
  92         int32_t t_size;
  93 };
  94 static struct inotab *inotab[HASHSIZE];
  95
  96 /*
  97  * Information retained about directories.
  98  */
  99 struct modeinfo {
 100         dump_ino_t ino;
 101         struct timeval timep[2];
 102         mode_t mode;
 103         uid_t uid;
 104         gid_t gid;
 105         unsigned int flags;
 106 };
 107
 108 /*
 109  * Definitions for library routines operating on directories.
 110  */
 111 #undef DIRBLKSIZ
 112 #define DIRBLKSIZ 1024
 113 struct rstdirdesc {
 114         int     dd_fd;
 115         int32_t dd_loc;
 116         int32_t dd_size;
 117         char    dd_buf[DIRBLKSIZ];
 118 };
 119
 120 /*
 121  * Global variables for this file.
 122  */
 123 static long     seekpt;
 124 static FILE     *df, *mf;
 125 static RST_DIR  *dirp;
 126 static char     dirfile[MAXPATHLEN] = "#";      /* No file */
 127 static char     modefile[MAXPATHLEN] = "#";     /* No file */
 128 static char     dot[2] = ".";                   /* So it can be modified */
 129
 130 /*
 131  * Format of old style directories.
 132  */
 133 #define ODIRSIZ 14
 134 struct odirect {
 135         u_short d_ino;
 136         char    d_name[ODIRSIZ];
 137 };
 138
 139 #if defined(__linux__) || defined(sunos)
 140 static struct inotab    *allocinotab __P((dump_ino_t, struct new_bsd_inode *, long));
 141 #else
 142 static struct inotab    *allocinotab __P((dump_ino_t, struct dinode *, long));
 143 #endif
 144 static void              dcvt __P((struct odirect *, struct direct *));
 145 static void              flushent __P((void));
 146 static struct inotab    *inotablookup __P((dump_ino_t));
 147 static RST_DIR          *opendirfile __P((const char *));
 148 static void              putdir __P((char *, size_t));
 149 static void              putent __P((struct direct *));
 150 static void              rst_seekdir __P((RST_DIR *, long, long));
 151 static long              rst_telldir __P((RST_DIR *));
 152 static struct direct    *searchdir __P((dump_ino_t, char *));
 153
 154 /*
 155  *      Extract directory contents, building up a directory structure
 156  *      on disk for extraction by name.
 157  *      If genmode is requested, save mode, owner, and times for all
 158  *      directories on the tape.
 159  */
 160 void
 161 extractdirs(int genmode)
 162 {
 163         int i;
 164 #if defined(__linux__) || defined(sunos)
 165         struct new_bsd_inode *ip;
 166 #else
 167         struct dinode *ip;
 168 #endif
 169         struct inotab *itp;
 170         struct direct nulldir;
 171         int fd;
 172
 173         Vprintf(stdout, "Extract directories from tape\n");
 174         (void) snprintf(dirfile, sizeof(dirfile), "%s/rstdir%ld", tmpdir,
 175                 (long)dumpdate);
 176         if (command != 'r' && command != 'R') {
 177                 (void) strncat(dirfile, "-XXXXXX",
 178                         sizeof(dirfile) - strlen(dirfile));
 179                 fd = mkstemp(dirfile);
 180         } else
 181                 fd = open(dirfile, O_RDWR|O_CREAT|O_EXCL, 0666);
 182         if (fd == -1 || (df = fdopen(fd, "w")) == NULL) {
 183                 if (fd != -1)
 184                         close(fd);
 185                 err(1, "cannot create directory temporary %s", dirfile);
 186         }
 187         if (genmode != 0) {
 188                 (void) snprintf(modefile, sizeof(modefile), "%s/rstmode%ld", tmpdir, (long)dumpdate);
 189                 if (command != 'r' && command != 'R') {
 190                         (void) strncat(modefile, "-XXXXXX",
 191                                 sizeof(modefile) - strlen(modefile));
 192                         fd = mkstemp(modefile);
 193                 } else
 194                         fd = open(modefile, O_RDWR|O_CREAT|O_EXCL, 0666);
 195                 if (fd == -1 || (mf = fdopen(fd, "w")) == NULL) {
 196                         if (fd != -1)
 197                                 close(fd);
 198                         err(1, "cannot create modefile %s", modefile);
 199                 }
 200         }
 201         nulldir.d_ino = 0;
 202         nulldir.d_type = DT_DIR;
 203         nulldir.d_namlen = 1;
 204         nulldir.d_name[0] = '/';
 205         nulldir.d_name[1] = '\0';
 206         nulldir.d_reclen = DIRSIZ(0, &nulldir);
 207         for (;;) {
 208                 curfile.name = "<directory file - name unknown>";
 209                 curfile.action = USING;
 210                 ip = curfile.dip;
 211                 if (ip == NULL || (ip->di_mode & IFMT) != IFDIR) {
 212                         if ( fclose(df) == EOF )
 213                                 err(1, "cannot write to file %s", dirfile);
 214                         dirp = opendirfile(dirfile);
 215                         if (dirp == NULL)
 216                                 warn("opendirfile");
 217                         if (mf != NULL && fclose(mf) == EOF )
 218                                 err(1, "cannot write to file %s", dirfile);
 219                         i = dirlookup(dot);
 220                         if (i == 0)
 221                                 panic("Root directory is not on tape\n");
 222                         return;
 223                 }
 224                 itp = allocinotab(curfile.ino, ip, seekpt);
 225                 getfile(putdir, xtrnull);
 226                 putent(&nulldir);
 227                 flushent();
 228                 itp->t_size = seekpt - itp->t_seekpt;
 229         }
 230 }
 231
 232 /*
 233  * skip over all the directories on the tape
 234  */
 235 void
 236 skipdirs(void)
 237 {
 238
 239         while (curfile.dip && (curfile.dip->di_mode & IFMT) == IFDIR) {
 240                 skipfile();
 241         }
 242 }
 243
 244 /*
 245  *      Recursively find names and inumbers of all files in subtree
 246  *      pname and pass them off to be processed.
 247  */
 248 void
 249 treescan(char *pname, dump_ino_t ino, long (*todo) __P((char *, dump_ino_t, int)))
 250 {
 251         struct inotab *itp;
 252         struct direct *dp;
 253         int namelen;
 254         long bpt;
 255         char locname[MAXPATHLEN + 1];
 256
 257         itp = inotablookup(ino);
 258         if (itp == NULL) {
 259                 /*
 260                  * Pname is name of a simple file or an unchanged directory.
 261                  */
 262                 (void) (*todo)(pname, ino, LEAF);
 263                 return;
 264         }
 265         /*
 266          * Pname is a dumped directory name.
 267          */
 268         if ((*todo)(pname, ino, NODE) == FAIL)
 269                 return;
 270         /*
 271          * begin search through the directory
 272          * skipping over "." and ".."
 273          */
 274         namelen = snprintf(locname, sizeof(locname), "%s/", pname);
 275         if (namelen >= (int)sizeof(locname))
 276                 namelen = sizeof(locname) - 1;
 277         rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 278         dp = rst_readdir(dirp); /* "." */
 279         if (dp != NULL && strcmp(dp->d_name, ".") == 0)
 280                 dp = rst_readdir(dirp); /* ".." */
 281         else
 282                 fprintf(stderr, "Warning: `.' missing from directory %s\n",
 283                         pname);
 284         if (dp != NULL && strcmp(dp->d_name, "..") == 0)
 285                 dp = rst_readdir(dirp); /* first real entry */
 286         else
 287                 fprintf(stderr, "Warning: `..' missing from directory %s\n",
 288                         pname);
 289         bpt = rst_telldir(dirp);
 290         /*
 291          * a zero inode signals end of directory
 292          */
 293         while (dp != NULL) {
 294                 locname[namelen] = '\0';
 295                 if (namelen + dp->d_namlen >= (int)sizeof(locname)) {
 296                         fprintf(stderr, "%s%s: name exceeds %ld char\n",
 297                                 locname, dp->d_name, (long)sizeof(locname) - 1);
 298                 } else {
 299                         (void) strncat(locname, dp->d_name, (int)dp->d_namlen);
 300                         treescan(locname, dp->d_ino, todo);
 301                         rst_seekdir(dirp, bpt, itp->t_seekpt);
 302                 }
 303                 dp = rst_readdir(dirp);
 304                 bpt = rst_telldir(dirp);
 305         }
 306 }
 307
 308 /*
 309  * Lookup a pathname which is always assumed to start from the ROOTINO.
 310  */
 311 struct direct *
 312 pathsearch(const char *pathname)
 313 {
 314         dump_ino_t ino;
 315         struct direct *dp;
 316         char *path, *name, buffer[MAXPATHLEN];
 317
 318         strcpy(buffer, pathname);
 319         path = buffer;
 320         ino = ROOTINO;
 321         while (*path == '/')
 322                 path++;
 323         dp = NULL;
 324 #ifdef __linux__
 325         while ((name = strsep(&path, "/")) != NULL && *name /* != NULL */) {
 326 #else
 327         while ((name = strtok_r(NULL, "/", &path)) != NULL && *name /* != NULL */) {
 328 #endif
 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 < (long)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                                 if (dp->d_namlen == 0 && dp->d_type != 0)
 397                                         dp->d_namlen = dp->d_type;
 398                                 dp->d_type = DT_UNKNOWN;
 399                         }
 400 #ifdef  DIRDEBUG
 401                         printf ("reclen = %d, namlen = %d, type = %d\n",
 402                                 dp->d_reclen, dp->d_namlen, dp->d_type);
 403 #endif
 404                         i = DIRBLKSIZ - (loc & (DIRBLKSIZ - 1));
 405                         if ((dp->d_reclen & 0x3) != 0 ||
 406                             dp->d_reclen > i ||
 407                             dp->d_reclen < DIRSIZ(0, dp) ||
 408                             dp->d_namlen > MAXNAMLEN) {
 409                                 Vprintf(stdout, "Mangled directory: ");
 410                                 if ((dp->d_reclen & 0x3) != 0)
 411                                         Vprintf(stdout,
 412                                            "reclen not multiple of 4 ");
 413                                 if (dp->d_reclen < DIRSIZ(0, dp))
 414                                         Vprintf(stdout,
 415                                            "reclen less than DIRSIZ (%d < %d) ",
 416                                            dp->d_reclen, DIRSIZ(0, dp));
 417                                 if (dp->d_namlen > MAXNAMLEN)
 418                                         Vprintf(stdout,
 419                                            "reclen name too big (%d > %d) ",
 420                                            dp->d_namlen, MAXNAMLEN);
 421                                 Vprintf(stdout, "\n");
 422                                 loc += i;
 423                                 continue;
 424                         }
 425                         loc += dp->d_reclen;
 426                         if (dp->d_ino != 0) {
 427                                 putent(dp);
 428                         }
 429                 }
 430         }
 431 }
 432
 433 /*
 434  * These variables are "local" to the following two functions.
 435  */
 436 static char dirbuf[DIRBLKSIZ];
 437 static long dirloc = 0;
 438 static long prev = 0;
 439
 440 /*
 441  * add a new directory entry to a file.
 442  */
 443 static void
 444 putent(struct direct *dp)
 445 {
 446         dp->d_reclen = DIRSIZ(0, dp);
 447         if (dirloc + dp->d_reclen > DIRBLKSIZ) {
 448                 ((struct direct *)(dirbuf + prev))->d_reclen =
 449                     DIRBLKSIZ - prev;
 450                 if ( fwrite(dirbuf, 1, DIRBLKSIZ, df) != DIRBLKSIZ )
 451                         err(1,"cannot write to file %s", dirfile);
 452                 dirloc = 0;
 453         }
 454         memmove(dirbuf + dirloc, dp, (size_t)dp->d_reclen);
 455         prev = dirloc;
 456         dirloc += dp->d_reclen;
 457 }
 458
 459 /*
 460  * flush out a directory that is finished.
 461  */
 462 static void
 463 flushent(void)
 464 {
 465         ((struct direct *)(dirbuf + prev))->d_reclen = DIRBLKSIZ - prev;
 466         if ( fwrite(dirbuf, (int)dirloc, 1, df) != 1 )
 467                 err(1, "cannot write to file %s", dirfile);
 468         seekpt = ftell(df);
 469         if (seekpt == -1)
 470                 err(1, "cannot write to file %s", dirfile);
 471         dirloc = 0;
 472 }
 473
 474 static void
 475 dcvt(struct odirect *odp, struct direct *ndp)
 476 {
 477
 478         memset(ndp, 0, (size_t)(sizeof *ndp));
 479         ndp->d_ino =  odp->d_ino;
 480         ndp->d_type = DT_UNKNOWN;
 481         (void) strncpy(ndp->d_name, odp->d_name, ODIRSIZ);
 482         ndp->d_namlen = strlen(ndp->d_name);
 483         ndp->d_reclen = DIRSIZ(0, ndp);
 484 }
 485
 486 /*
 487  * Seek to an entry in a directory.
 488  * Only values returned by rst_telldir should be passed to rst_seekdir.
 489  * This routine handles many directories in a single file.
 490  * It takes the base of the directory in the file, plus
 491  * the desired seek offset into it.
 492  */
 493 static void
 494 rst_seekdir(RST_DIR *dirp, long loc, long base)
 495 {
 496
 497         if (loc == rst_telldir(dirp))
 498                 return;
 499         loc -= base;
 500         if (loc < 0)
 501                 fprintf(stderr, "bad seek pointer to rst_seekdir %ld\n", loc);
 502         (void) lseek(dirp->dd_fd, base + (loc & ~(DIRBLKSIZ - 1)), SEEK_SET);
 503         dirp->dd_loc = loc & (DIRBLKSIZ - 1);
 504         if (dirp->dd_loc != 0)
 505                 dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ);
 506 }
 507
 508 /*
 509  * get next entry in a directory.
 510  */
 511 struct direct *
 512 rst_readdir(RST_DIR *dirp)
 513 {
 514         struct direct *dp;
 515
 516         for (;;) {
 517                 if (dirp->dd_loc == 0) {
 518                         dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf,
 519                             DIRBLKSIZ);
 520                         if (dirp->dd_size <= 0) {
 521                                 Dprintf(stderr, "error reading directory\n");
 522                                 return (NULL);
 523                         }
 524                 }
 525                 if (dirp->dd_loc >= dirp->dd_size) {
 526                         dirp->dd_loc = 0;
 527                         continue;
 528                 }
 529                 dp = (struct direct *)(dirp->dd_buf + dirp->dd_loc);
 530                 if (dp->d_reclen == 0 ||
 531                     dp->d_reclen > DIRBLKSIZ + 1 - dirp->dd_loc) {
 532                         Dprintf(stderr, "corrupted directory: bad reclen %d\n",
 533                                 dp->d_reclen);
 534                         return (NULL);
 535                 }
 536                 dirp->dd_loc += dp->d_reclen;
 537                 if (dp->d_ino == 0 && strcmp(dp->d_name, "/") == 0)
 538                         return (NULL);
 539                 if (dp->d_ino >= maxino) {
 540                         Dprintf(stderr, "corrupted directory: bad inum %d\n",
 541                                 dp->d_ino);
 542                         continue;
 543                 }
 544                 return (dp);
 545         }
 546 }
 547
 548 /*
 549  * Simulate the opening of a directory
 550  */
 551 RST_DIR *
 552 rst_opendir(const char *name)
 553 {
 554         struct inotab *itp;
 555         RST_DIR *dirp;
 556         dump_ino_t ino;
 557
 558         if ((ino = dirlookup(name)) > 0 &&
 559             (itp = inotablookup(ino)) != NULL) {
 560                 dirp = opendirfile(dirfile);
 561                 rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 562                 return (dirp);
 563         }
 564         return (NULL);
 565 }
 566
 567 /*
 568  * In our case, there is nothing to do when closing a directory.
 569  */
 570 void
 571 rst_closedir(RST_DIR *dirp)
 572 {
 573
 574         (void)close(dirp->dd_fd);
 575         free(dirp);
 576         return;
 577 }
 578
 579 /*
 580  * Simulate finding the current offset in the directory.
 581  */
 582 static long
 583 rst_telldir(RST_DIR *dirp)
 584 {
 585         return ((long)lseek(dirp->dd_fd,
 586             (OFF_T)0, SEEK_CUR) - dirp->dd_size + dirp->dd_loc);
 587 }
 588
 589 /*
 590  * Open a directory file.
 591  */
 592 static RST_DIR *
 593 opendirfile(const char *name)
 594 {
 595         RST_DIR *dirp;
 596         int fd;
 597
 598         if ((fd = open(name, O_RDONLY)) == -1)
 599                 return (NULL);
 600         if ((dirp = malloc(sizeof(RST_DIR))) == NULL) {
 601                 (void)close(fd);
 602                 return (NULL);
 603         }
 604         dirp->dd_fd = fd;
 605         dirp->dd_loc = 0;
 606         return (dirp);
 607 }
 608
 609 /*
 610  * Set the mode, owner, and times for all new or changed directories
 611  */
 612 void
 613 setdirmodes(int flags)
 614 {
 615         FILE *mf;
 616         struct modeinfo node;
 617         struct entry *ep;
 618         char *cp;
 619
 620         Vprintf(stdout, "Set directory mode, owner, and times.\n");
 621         if (command == 'r' || command == 'R')
 622                 (void) snprintf(modefile, sizeof(modefile), "%s/rstmode%lu", tmpdir, (long)dumpdate);
 623         if (modefile[0] == '#') {
 624                 panic("modefile not defined\n");
 625                 fprintf(stderr, "directory mode, owner, and times not set\n");
 626                 return;
 627         }
 628         mf = fopen(modefile, "r");
 629         if (mf == NULL) {
 630                 warn("fopen");
 631                 fprintf(stderr, "cannot open mode file %s\n", modefile);
 632                 fprintf(stderr, "directory mode, owner, and times not set\n");
 633                 return;
 634         }
 635         clearerr(mf);
 636         for (;;) {
 637                 (void) fread((char *)&node, 1, sizeof(struct modeinfo), mf);
 638                 if (feof(mf))
 639                         break;
 640                 ep = lookupino(node.ino);
 641                 if (command == 'i' || command == 'x') {
 642                         if (ep == NULL)
 643                                 continue;
 644                         if ((flags & FORCE) == 0 && ep->e_flags & EXISTED) {
 645                                 ep->e_flags &= ~NEW;
 646                                 continue;
 647                         }
 648                         if ((flags & FORCE) == 0 &&
 649                             node.ino == ROOTINO &&
 650                             reply("set owner/mode for '.'") == FAIL)
 651                                 continue;
 652                 }
 653                 if (ep == NULL) {
 654                         panic("cannot find directory inode %d\n", node.ino);
 655                 } else {
 656                         cp = myname(ep);
 657                         (void) chown(cp, node.uid, node.gid);
 658                         (void) chmod(cp, node.mode);
 659                         if (node.flags)
 660 #ifdef  __linux__
 661                                 (void) fsetflags(cp, node.flags);
 662 #else
 663                                 (void) chflags(cp, node.flags);
 664 #endif
 665                         utimes(cp, node.timep);
 666                         ep->e_flags &= ~NEW;
 667                 }
 668         }
 669         if (ferror(mf))
 670                 panic("error setting directory modes\n");
 671         (void) fclose(mf);
 672 }
 673
 674 /*
 675  * Generate a literal copy of a directory.
 676  */
 677 int
 678 genliteraldir(char *name, dump_ino_t ino)
 679 {
 680         struct inotab *itp;
 681         int ofile, dp, i, size;
 682         char buf[BUFSIZ];
 683
 684         itp = inotablookup(ino);
 685         if (itp == NULL)
 686                 panic("Cannot find directory inode %d named %s\n", ino, name);
 687         if ((ofile = open(name, O_WRONLY | O_CREAT | O_TRUNC, 0666)) < 0) {
 688                 warn("%s: cannot create file\n", name);
 689                 return (FAIL);
 690         }
 691         rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 692         dp = dup(dirp->dd_fd);
 693         for (i = itp->t_size; i > 0; i -= BUFSIZ) {
 694                 size = i < BUFSIZ ? i : BUFSIZ;
 695                 if (read(dp, buf, (int) size) == -1) {
 696                         warnx("write error extracting inode %lu, name %s\n",
 697                                 (unsigned long)curfile.ino, curfile.name);
 698                         err(1, "read");
 699                 }
 700                 if (!Nflag && write(ofile, buf, (int) size) == -1) {
 701                         warnx("write error extracting inode %lu, name %s\n",
 702                                 (unsigned long)curfile.ino, curfile.name);
 703                         err(1, "write");
 704                 }
 705         }
 706         (void) close(dp);
 707         (void) close(ofile);
 708         return (GOOD);
 709 }
 710
 711 /*
 712  * Determine the type of an inode
 713  */
 714 int
 715 inodetype(dump_ino_t ino)
 716 {
 717         struct inotab *itp;
 718
 719         itp = inotablookup(ino);
 720         if (itp == NULL)
 721                 return (LEAF);
 722         return (NODE);
 723 }
 724
 725 /*
 726  * Allocate and initialize a directory inode entry.
 727  * If requested, save its pertinent mode, owner, and time info.
 728  */
 729 static struct inotab *
 730 #ifdef  __linux__
 731 allocinotab(dump_ino_t ino, struct new_bsd_inode *dip, long seekpt)
 732 #else
 733 allocinotab(dump_ino_t ino, struct dinode *dip, long seekpt)
 734 #endif
 735 {
 736         struct inotab   *itp;
 737         struct modeinfo node;
 738
 739         itp = calloc(1, sizeof(struct inotab));
 740         if (itp == NULL)
 741                 panic("no memory directory table\n");
 742         itp->t_next = inotab[INOHASH(ino)];
 743         inotab[INOHASH(ino)] = itp;
 744         itp->t_ino = ino;
 745         itp->t_seekpt = seekpt;
 746         if (mf == NULL)
 747                 return (itp);
 748         node.ino = ino;
 749 #ifdef  __linux__
 750         node.timep[0].tv_sec = dip->di_atime.tv_sec;
 751         node.timep[0].tv_usec = dip->di_atime.tv_usec;
 752         node.timep[1].tv_sec = dip->di_mtime.tv_sec;
 753         node.timep[1].tv_usec = dip->di_mtime.tv_usec;
 754 #else   /* __linux__ */
 755         node.timep[0].tv_sec = dip->di_atime;
 756         node.timep[0].tv_usec = dip->di_atimensec / 1000;
 757         node.timep[1].tv_sec = dip->di_mtime;
 758         node.timep[1].tv_usec = dip->di_mtimensec / 1000;
 759 #endif  /* __linux__ */
 760         node.mode = dip->di_mode;
 761         node.flags = dip->di_flags;
 762         node.uid = dip->di_uid;
 763         node.gid = dip->di_gid;
 764         if ( fwrite((char *)&node, 1, sizeof(struct modeinfo), mf) != sizeof(struct modeinfo) )
 765                 err(1,"cannot write to file %s", modefile);
 766         return (itp);
 767 }
 768
 769 /*
 770  * Look up an inode in the table of directories
 771  */
 772 static struct inotab *
 773 inotablookup(dump_ino_t ino)
 774 {
 775         struct inotab *itp;
 776
 777         for (itp = inotab[INOHASH(ino)]; itp != NULL; itp = itp->t_next)
 778                 if (itp->t_ino == ino)
 779                         return (itp);
 780         return (NULL);
 781 }
 782
 783 /*
 784  * Clean up and exit
 785  */
 786 void
 787 cleanup(void)
 788 {
 789         closemt();
 790         if (modefile[0] != '#')
 791                 (void) unlink(modefile);
 792         if (dirfile[0] != '#')
 793                 (void) unlink(dirfile);
 794 }