src/volser/restorevol.c

   1 /*
   2  * Copyright 2000, International Business Machines Corporation and others.
   3  * All Rights Reserved.
   4  *
   5  * This software has been released under the terms of the IBM Public
   6  * License.  For details, see the LICENSE file in the top-level source
   7  * directory or online at http://www.openafs.org/dl/license10.html
   8  */
   9
  10 /*
  11  * Read a vos dump and recreate the tree.
  12  *
  13  * restorevol [-file <dump file>]
  14  *            [-dir <restore dir>]
  15  *            [-extension <name extension>]
  16  *            [-mountpoint <mount point root>]
  17  *            [-umask <mode mask>]
  18  *
  19  * 1. The dump file will be restored within the current or that specified with -dir.
  20  * 2. Within this dir, a subdir is created. It's name is the RW volume name
  21  *    that was dumped. An extension can be appended to this directory name
  22  *    with -extension.
  23  * 3. All mountpoints will appear as symbolic links to the volume. The
  24  *    pathname to the volume will be either that in -mountpoint, or -dir.
  25  *    Symbolic links remain untouched.
  26  * 4. You can change your umask during the restore with -umask. Otherwise, it
  27  *    uses your current umask. Mode bits for directories are 0777 (then
  28  *    AND'ed with the umask). Mode bits for files are the owner mode bits
  29  *    duplicated accross group and user (then AND'ed with the umask).
  30  * 5. For restores of full dumps, if a directory says it has a file and
  31  *    the file is not found, then a symbolic link "AFSFile-<#>" will
  32  *    appear in that restored tree. Restores of incremental dumps remove
  33  *    all these files at the end (expensive because it is a tree search).
  34  * 6. If a file or directory was found in the dump but found not to be
  35  *    connected to the hierarchical tree, then the file or directory
  36  *    will be connected at the root of the tree as "__ORPHANEDIR__.<#>"
  37  *    or "__ORPHANFILE__.<#>".
  38  * 7. ACLs are not restored.
  39  *
  40  */
  41
  42 #include <afsconfig.h>
  43 #include <afs/param.h>
  44
  45
  46 #include <afs/afsint.h>
  47 #include <afs/nfs.h>
  48 #include <lock.h>
  49 #include <afs/ihandle.h>
  50 #include <afs/vnode.h>
  51 #include <afs/volume.h>
  52 #include "volint.h"
  53 #include "dump.h"
  54 #include <afs/cmd.h>
  55
  56 #include <sys/param.h>
  57 #include <sys/types.h>
  58 #include <sys/uio.h>
  59 #include <stdio.h>
  60 #include <errno.h>
  61 #include <netinet/in.h>
  62 #include <sys/stat.h>
  63 #include <fcntl.h>
  64 #include <dirent.h>
  65 #include <string.h>
  66
  67
  68 char rootdir[MAXPATHLEN];
  69 char mntroot[MAXPATHLEN];
  70 #define ADIR  "AFSDir-"
  71 #define AFILE "AFSFile-"
  72 #define ODIR  "__ORPHANEDIR__."
  73 #define OFILE "__ORPHANFILE__."
  74
  75 int inc_dump = 0;
  76 FILE *dumpfile;
  77
  78 afs_int32
  79 readvalue(int size)
  80 {
  81     afs_int32 value, s;
  82     int code;
  83     char *ptr;
  84
  85     value = 0;
  86     ptr = (char *)&value;
  87
  88     s = sizeof(value) - size;
  89     if (size < 0) {
  90         fprintf(stderr, "Too much data in afs_int32\n");
  91         return 0;
  92     }
  93
  94     code = fread(&ptr[s], 1, size, dumpfile);
  95     if (code != size)
  96         fprintf(stderr, "Code = %d; Errno = %d\n", code, errno);
  97
  98     return (value);
  99 }
 100
 101 char
 102 readchar(void)
 103 {
 104     char value;
 105     int code;
 106
 107     value = '\0';
 108     code = fread(&value, 1, 1, dumpfile);
 109     if (code != 1)
 110         fprintf(stderr, "Code = %d; Errno = %d\n", code, errno);
 111
 112     return (value);
 113 }
 114
 115 #define BUFSIZE 16384
 116 char buf[BUFSIZE];
 117
 118 void
 119 readdata(char *buffer, afs_sfsize_t size)
 120 {
 121     int code;
 122     afs_int32 s;
 123
 124     if (!buffer) {
 125         while (size > 0) {
 126             s = (afs_int32) ((size > BUFSIZE) ? BUFSIZE : size);
 127             code = fread(buf, 1, s, dumpfile);
 128             if (code != s)
 129                 fprintf(stderr, "Code = %d; Errno = %d\n", code, errno);
 130             size -= s;
 131         }
 132     } else {
 133         code = fread(buffer, 1, size, dumpfile);
 134         if (code != size) {
 135             if (code < 0)
 136                 fprintf(stderr, "Code = %d; Errno = %d\n", code, errno);
 137             else
 138                 fprintf(stderr, "Read %d bytes out of %" AFS_INT64_FMT "\n", code, (afs_uintmax_t)size);
 139         }
 140         if ((code >= 0) && (code < BUFSIZE))
 141             buffer[size] = 0;   /* Add null char at end */
 142     }
 143 }
 144
 145 afs_int32
 146 ReadDumpHeader(struct DumpHeader *dh)
 147 {
 148     int i, done;
 149     char tag, c;
 150     afs_int32 magic AFS_UNUSED;
 151
 152 /*  memset(&dh, 0, sizeof(dh)); */
 153
 154     magic = ntohl(readvalue(4));
 155     dh->version = ntohl(readvalue(4));
 156
 157     done = 0;
 158     while (!done) {
 159         tag = readchar();
 160         switch (tag) {
 161         case 'v':
 162             dh->volumeId = ntohl(readvalue(4));
 163             break;
 164
 165         case 'n':
 166             for (i = 0, c = 'a'; c != '\0'; i++) {
 167                 dh->volumeName[i] = c = readchar();
 168             }
 169             dh->volumeName[i] = c;
 170             break;
 171
 172         case 't':
 173             dh->nDumpTimes = ntohl(readvalue(2)) >> 1;
 174             if (dh->nDumpTimes > MAXDUMPTIMES) {
 175                 fprintf(stderr, "Too many dump times in header (%d > %d)\n",
 176                         dh->nDumpTimes, MAXDUMPTIMES);
 177                 dh->nDumpTimes = MAXDUMPTIMES;
 178             }
 179             for (i = 0; i < dh->nDumpTimes; i++) {
 180                 dh->dumpTimes[i].from = ntohl(readvalue(4));
 181                 dh->dumpTimes[i].to = ntohl(readvalue(4));
 182             }
 183             break;
 184
 185         default:
 186             done = 1;
 187             break;
 188         }
 189     }
 190
 191     return ((afs_int32) tag);
 192 }
 193
 194 struct volumeHeader {
 195     afs_int32 volumeId;
 196     char volumeName[100];
 197     afs_int32 volType;
 198     afs_int32 uniquifier;
 199     afs_int32 parentVol;
 200     afs_int32 cloneId;
 201     afs_int32 maxQuota;
 202     afs_int32 minQuota;
 203     afs_int32 diskUsed;
 204     afs_int32 fileCount;
 205     afs_int32 accountNumber;
 206     afs_int32 owner;
 207     afs_int32 creationDate;
 208     afs_int32 accessDate;
 209     afs_int32 updateDate;
 210     afs_int32 expirationDate;
 211     afs_int32 backupDate;
 212     afs_int32 dayUseDate;
 213     afs_int32 dayUse;
 214     afs_int32 weekCount;
 215     afs_int32 weekUse[100];     /* weekCount of these */
 216     char motd[1024];
 217     int inService;
 218     int blessed;
 219     char message[1024];
 220     afs_int32 volUpdateCounter;
 221 };
 222
 223 afs_int32
 224 ReadVolumeHeader(afs_int32 count)
 225 {
 226     struct volumeHeader vh;
 227     int i, done;
 228     char tag, c;
 229
 230 /*  memset(&vh, 0, sizeof(vh)); */
 231
 232     done = 0;
 233     while (!done) {
 234         tag = readchar();
 235         switch (tag) {
 236         case 'i':
 237             vh.volumeId = ntohl(readvalue(4));
 238             break;
 239
 240         case 'v':
 241             (void)ntohl(readvalue(4));  /* version stamp - ignore */
 242             break;
 243
 244         case 'n':
 245             for (i = 0, c = 'a'; c != '\0'; i++) {
 246                 vh.volumeName[i] = c = readchar();
 247             }
 248             vh.volumeName[i] = c;
 249             break;
 250
 251         case 's':
 252             vh.inService = ntohl(readvalue(1));
 253             break;
 254
 255         case 'b':
 256             vh.blessed = ntohl(readvalue(1));
 257             break;
 258
 259         case 'u':
 260             vh.uniquifier = ntohl(readvalue(4));
 261             break;
 262
 263         case 't':
 264             vh.volType = ntohl(readvalue(1));
 265             break;
 266
 267         case 'p':
 268             vh.parentVol = ntohl(readvalue(4));
 269             break;
 270
 271         case 'c':
 272             vh.cloneId = ntohl(readvalue(4));
 273             break;
 274
 275         case 'q':
 276             vh.maxQuota = ntohl(readvalue(4));
 277             break;
 278
 279         case 'm':
 280             vh.minQuota = ntohl(readvalue(4));
 281             break;
 282
 283         case 'd':
 284             vh.diskUsed = ntohl(readvalue(4));
 285             break;
 286
 287         case 'f':
 288             vh.fileCount = ntohl(readvalue(4));
 289             break;
 290
 291         case 'a':
 292             vh.accountNumber = ntohl(readvalue(4));
 293             break;
 294
 295         case 'o':
 296             vh.owner = ntohl(readvalue(4));
 297             break;
 298
 299         case 'C':
 300             vh.creationDate = ntohl(readvalue(4));
 301             break;
 302
 303         case 'A':
 304             vh.accessDate = ntohl(readvalue(4));
 305             break;
 306
 307         case 'U':
 308             vh.updateDate = ntohl(readvalue(4));
 309             break;
 310
 311         case 'E':
 312             vh.expirationDate = ntohl(readvalue(4));
 313             break;
 314
 315         case 'B':
 316             vh.backupDate = ntohl(readvalue(4));
 317             break;
 318
 319         case 'O':
 320             for (i = 0, c = 'a'; c != '\0'; i++) {
 321                 vh.message[i] = c = readchar();
 322             }
 323             vh.volumeName[i] = c;
 324             break;
 325
 326         case 'W':
 327             vh.weekCount = ntohl(readvalue(2));
 328             for (i = 0; i < vh.weekCount; i++) {
 329                 vh.weekUse[i] = ntohl(readvalue(4));
 330             }
 331             break;
 332
 333         case 'M':
 334             for (i = 0, c = 'a'; c != '\0'; i++) {
 335                 vh.motd[i] = c = readchar();
 336             }
 337             break;
 338
 339         case 'D':
 340             vh.dayUseDate = ntohl(readvalue(4));
 341             break;
 342
 343         case 'Z':
 344             vh.dayUse = ntohl(readvalue(4));
 345             break;
 346
 347         case 'V':
 348             readvalue(4); /*volUpCounter*/
 349             break;
 350
 351         default:
 352             done = 1;
 353             break;
 354         }
 355     }
 356
 357     return ((afs_int32) tag);
 358 }
 359
 360 struct vNode {
 361     afs_int32 vnode;
 362     afs_int32 uniquifier;
 363     afs_int32 type;
 364     afs_int32 linkCount;
 365     afs_int32 dataVersion;
 366     afs_int32 unixModTime;
 367     afs_int32 servModTime;
 368     afs_int32 author;
 369     afs_int32 owner;
 370     afs_int32 group;
 371     afs_int32 modebits;
 372     afs_int32 parent;
 373     char acl[192];
 374 #ifdef notdef
 375     struct acl_accessList {
 376         int size;               /*size of this access list in bytes, including MySize itself */
 377         int version;            /*to deal with upward compatibility ; <= ACL_ACLVERSION */
 378         int total;
 379         int positive;           /* number of positive entries */
 380         int negative;           /* number of minus entries */
 381         struct acl_accessEntry {
 382             int id;             /*internally-used ID of user or group */
 383             int rights;         /*mask */
 384         } entries[100];
 385     } acl;
 386 #endif
 387     afs_sfsize_t dataSize;
 388 };
 389
 390 #define MAXNAMELEN 256
 391
 392 afs_int32
 393 ReadVNode(afs_int32 count)
 394 {
 395     struct vNode vn;
 396     int code, i, done;
 397     char tag;
 398     char dirname[MAXNAMELEN], linkname[MAXNAMELEN], lname[MAXNAMELEN];
 399     char parentdir[MAXNAMELEN], vflink[MAXNAMELEN];
 400     char filename[MAXNAMELEN], fname[MAXNAMELEN];
 401     int len;
 402     afs_int32 vnode;
 403     afs_int32 mode = 0;
 404     afs_uint32 hi, lo;
 405
 406 /*  memset(&vn, 0, sizeof(vn)); */
 407     vn.dataSize = 0;
 408     vn.vnode = 0;
 409     vn.parent = 0;
 410     vn.type = 0;
 411
 412     vn.vnode = ntohl(readvalue(4));
 413     vn.uniquifier = ntohl(readvalue(4));
 414
 415     done = 0;
 416     while (!done) {
 417         tag = readchar();
 418         switch (tag) {
 419         case 't':
 420             vn.type = ntohl(readvalue(1));
 421             break;
 422
 423         case 'l':
 424             vn.linkCount = ntohl(readvalue(2));
 425             break;
 426
 427         case 'v':
 428             vn.dataVersion = ntohl(readvalue(4));
 429             break;
 430
 431         case 'm':
 432             vn.unixModTime = ntohl(readvalue(4));
 433             break;
 434
 435         case 's':
 436             vn.servModTime = ntohl(readvalue(4));
 437             break;
 438
 439         case 'a':
 440             vn.author = ntohl(readvalue(4));
 441             break;
 442
 443         case 'o':
 444             vn.owner = ntohl(readvalue(4));
 445             break;
 446
 447         case 'g':
 448             vn.group = ntohl(readvalue(4));
 449             break;
 450
 451         case 'b':
 452             vn.modebits = ntohl(readvalue(2));
 453             break;
 454
 455         case 'p':
 456             vn.parent = ntohl(readvalue(4));
 457             break;
 458
 459         case 'A':
 460             readdata(vn.acl, 192);      /* Skip ACL data */
 461             break;
 462
 463         case 'h':
 464             hi = ntohl(readvalue(4));
 465             lo = ntohl(readvalue(4));
 466             FillInt64(vn.dataSize, hi, lo);
 467             goto common_vnode;
 468
 469         case 'f':
 470             vn.dataSize = ntohl(readvalue(4));
 471
 472           common_vnode:
 473             /* parentdir is the name of this dir's vnode-file-link
 474              * or this file's parent vnode-file-link.
 475              * "./AFSDir-<#>". It's a symbolic link to its real dir.
 476              * The parent dir and symbolic link to it must exist.
 477              */
 478             vnode = ((vn.type == 2) ? vn.vnode : vn.parent);
 479             if (vnode == 1)
 480                 strncpy(parentdir, rootdir, sizeof parentdir);
 481             else {
 482                 afs_snprintf(parentdir, sizeof parentdir, "%s" OS_DIRSEP "%s%d", rootdir,
 483                              ADIR, vnode);
 484
 485                 len = readlink(parentdir, linkname, MAXNAMELEN);
 486                 if (len < 0) {
 487                     /* parentdir does not exist. So create an orphan dir.
 488                      * and then link the parentdir to the orphaned dir.
 489                      */
 490                     afs_snprintf(linkname, sizeof linkname, "%s" OS_DIRSEP "%s%d",
 491                                  rootdir, ODIR, vnode);
 492                     code = mkdir(linkname, 0777);
 493                     if ((code < 0) && (errno != EEXIST)) {
 494                         fprintf(stderr,
 495                                 "Error creating directory %s  code=%d;%d\n",
 496                                 linkname, code, errno);
 497                     }
 498
 499                     /* Link the parentdir to it - now parentdir exists */
 500                     afs_snprintf(linkname, sizeof linkname, "%s%d/", ODIR,
 501                                  vnode);
 502                     code = symlink(linkname, parentdir);
 503                     if (code) {
 504                         fprintf(stderr,
 505                                 "Error creating symlink %s -> %s  code=%d;%d\n",
 506                                 parentdir, linkname, code, errno);
 507                     }
 508                 }
 509             }
 510
 511             if (vn.type == 2) {
 512                  /*ITSADIR*/
 513                     /* We read the directory entries. If the entry is a
 514                      * directory, the subdir is created and the root dir
 515                      * will contain a link to it. If its a file, we only
 516                      * create a symlink in the dir to the file name.
 517                      */
 518                 char *buffer;
 519                 unsigned short j;
 520                 afs_int32 this_vn;
 521                 char *this_name;
 522
 523                 struct DirEntry {
 524                     char flag;
 525                     char length;
 526                     unsigned short next;
 527                     struct MKFid {
 528                         afs_int32 vnode;
 529                         afs_int32 vunique;
 530                     } fid;
 531                     char name[20];
 532                 };
 533
 534                 struct Pageheader {
 535                     unsigned short pgcount;
 536                     unsigned short tag;
 537                     char freecount;
 538                     char freebitmap[8];
 539                     char padding[19];
 540                 };
 541
 542                 struct DirHeader {
 543                     struct Pageheader header;
 544                     char alloMap[128];
 545                     unsigned short hashTable[128];
 546                 };
 547
 548                 struct Page0 {
 549                     struct DirHeader header;
 550                     struct DirEntry entry[1];
 551                 } *page0;
 552
 553
 554                 buffer = NULL;
 555                 buffer = (char *)malloc(vn.dataSize);
 556
 557                 readdata(buffer, vn.dataSize);
 558                 page0 = (struct Page0 *)buffer;
 559
 560                 /* Step through each bucket in the hash table, i,
 561                  * and follow each element in the hash chain, j.
 562                  * This gives us each entry of the dir.
 563                  */
 564                 for (i = 0; i < 128; i++) {
 565                     for (j = ntohs(page0->header.hashTable[i]); j;
 566                          j = ntohs(page0->entry[j].next)) {
 567                         j -= 13;
 568                         this_vn = ntohl(page0->entry[j].fid.vnode);
 569                         this_name = page0->entry[j].name;
 570
 571                         if ((strcmp(this_name, ".") == 0)
 572                             || (strcmp(this_name, "..") == 0))
 573                             continue;   /* Skip these */
 574
 575                         /* For a directory entry, create it. Then create the
 576                          * link (from the rootdir) to this directory.
 577                          */
 578                         if (this_vn & 1) {
 579                              /*ADIRENTRY*/
 580                                 /* dirname is the directory to create.
 581                                  * vflink is what will link to it.
 582                                  */
 583                                 afs_snprintf(dirname, sizeof dirname, "%s" OS_DIRSEP "%s",
 584                                              parentdir, this_name);
 585                             afs_snprintf(vflink, sizeof vflink, "%s" OS_DIRSEP "%s%d",
 586                                          rootdir, ADIR, this_vn);
 587
 588                             /* The link and directory may already exist */
 589                             len = readlink(vflink, linkname, MAXNAMELEN);
 590                             if (len < 0) {
 591                                 /* Doesn't already exist - so create the directory.
 592                                  * umask will pare the mode bits down.
 593                                  */
 594                                 code = mkdir(dirname, 0777);
 595                                 if ((code < 0) && (errno != EEXIST)) {
 596                                     fprintf(stderr,
 597                                             "Error creating directory %s  code=%d;%d\n",
 598                                             dirname, code, errno);
 599                                 }
 600                             } else {
 601                                 /* Does already exist - so move the directory.
 602                                  * It was created originally as orphaned.
 603                                  */
 604                                 linkname[len - 1] = '\0';       /* remove '/' at end */
 605                                 afs_snprintf(lname, sizeof lname, "%s" OS_DIRSEP "%s",
 606                                              rootdir, linkname);
 607                                 code = rename(lname, dirname);
 608                                 if (code) {
 609                                     fprintf(stderr,
 610                                             "Error renaming %s to %s  code=%d;%d\n",
 611                                             lname, dirname, code, errno);
 612                                 }
 613                             }
 614
 615                             /* Now create/update the link to the new/moved directory */
 616                             if (vn.vnode == 1)
 617                                 afs_snprintf(dirname, sizeof dirname, "%s/",
 618                                              this_name);
 619                             else
 620                                 afs_snprintf(dirname, sizeof dirname,
 621                                              "%s%d/%s/", ADIR, vn.vnode,
 622                                              this_name);
 623                             unlink(vflink);
 624                             code = symlink(dirname, vflink);
 625                             if (code) {
 626                                 fprintf(stderr,
 627                                         "Error creating symlink %s -> %s  code=%d;%d\n",
 628                                         vflink, dirname, code, errno);
 629                             }
 630                         }
 631                         /*ADIRENTRY*/
 632                             /* For a file entry, we remember the name of the file
 633                              * by creating a link within the directory. Restoring
 634                              * the file will later remove the link.
 635                              */
 636                             else {
 637                              /*AFILEENTRY*/ afs_snprintf(vflink,
 638                                                          sizeof vflink,
 639                                                          "%s" OS_DIRSEP "%s%d", parentdir,
 640                                                          AFILE, this_vn);
 641
 642                             code = symlink(this_name, vflink);
 643                             if ((code < 0) && (errno != EEXIST)) {
 644                                 fprintf(stderr,
 645                                         "Error creating symlink %s -> %s  code=%d;%d\n",
 646                                         vflink, page0->entry[j].name, code,
 647                                         errno);
 648                             }
 649                         }
 650                      /*AFILEENTRY*/}
 651                 }
 652                 free(buffer);
 653             }
 654             /*ITSADIR*/
 655             else if (vn.type == 1) {
 656                  /*ITSAFILE*/
 657                     /* A file vnode. So create it into the desired directory. A
 658                      * link should exist in the directory naming the file.
 659                      */
 660                 int fid;
 661                 int lfile;
 662                 afs_sfsize_t size, s;
 663                 ssize_t count;
 664
 665                 /* Check if its vnode-file-link exists. If not,
 666                  * then the file will be an orphaned file.
 667                  */
 668                 lfile = 1;
 669                 afs_snprintf(filename, sizeof filename, "%s" OS_DIRSEP "%s%d", parentdir,
 670                              AFILE, vn.vnode);
 671                 len = readlink(filename, fname, MAXNAMELEN);
 672                 if (len < 0) {
 673                     afs_snprintf(filename, sizeof filename, "%s" OS_DIRSEP "%s%d",
 674                                  rootdir, OFILE, vn.vnode);
 675                     lfile = 0;  /* no longer a linked file; a direct path */
 676                 }
 677
 678                 /* Create a mode for the file. Use the owner bits and
 679                  * duplicate them across group and other. The umask
 680                  * will remove what we don't want.
 681                  */
 682                 mode = (vn.modebits >> 6) & 0x7;
 683                 mode |= (mode << 6) | (mode << 3);
 684
 685                 /* Write the file out */
 686                 fid = open(filename, (O_CREAT | O_WRONLY | O_TRUNC), mode);
 687                 if (fid < 0) {
 688                     fprintf(stderr, "Open %s: Errno = %d\n", filename, errno);
 689                     goto open_fail;
 690                 }
 691                 size = vn.dataSize;
 692                 while (size > 0) {
 693                     s = (afs_int32) ((size > BUFSIZE) ? BUFSIZE : size);
 694                     code = fread(buf, 1, s, dumpfile);
 695                     if (code != s) {
 696                         if (code < 0)
 697                             fprintf(stderr, "Code = %d; Errno = %d\n", code,
 698                                     errno);
 699                         else {
 700                             char tmp[100];
 701                             (void)afs_snprintf(tmp, sizeof tmp,
 702                                                "Read %llu bytes out of %llu",
 703                                                (afs_uintmax_t) (vn.dataSize -
 704                                                                 size),
 705                                                (afs_uintmax_t) vn.dataSize);
 706                             fprintf(stderr, "%s\n", tmp);
 707                         }
 708                         break;
 709                     }
 710                     if (code > 0) {
 711                         count = write(fid, buf, code);
 712                         if (count < 0) {
 713                             fprintf(stderr, "Count = %ld, Errno = %d\n",
 714                                     (long)count, errno);
 715                             break;
 716                         } else if (count != code) {
 717                             fprintf(stderr, "Wrote %llu bytes out of %llu\n",
 718                                     (afs_uintmax_t) count,
 719                                     (afs_uintmax_t) code);
 720                             break;
 721                         }
 722                         size -= code;
 723                     }
 724                 }
 725                 close(fid);
 726                 if (size != 0) {
 727                     fprintf(stderr, "   File %s (%s) is incomplete\n",
 728                             filename, fname);
 729                 }
 730
 731 open_fail:
 732                 /* Remove the link to the file */
 733                 if (lfile) {
 734                     unlink(filename);
 735                 }
 736             }
 737             /*ITSAFILE*/
 738             else if (vn.type == 3) {
 739                  /*ITSASYMLINK*/
 740                     /* A symlink vnode. So read it into the desired directory. This could
 741                      * also be a mount point. If the volume is being restored to AFS, this
 742                      * will become a mountpoint. If not, it becomes a symlink to no-where.
 743                      */
 744                 afs_int32 s;
 745
 746                 /* Check if its vnode-file-link exists and create pathname
 747                  * of the symbolic link. If it doesn't exist,
 748                  * then the link will be an orphaned link.
 749                  */
 750                 afs_snprintf(linkname, sizeof linkname, "%s" OS_DIRSEP "%s%d", parentdir,
 751                              AFILE, vn.vnode);
 752                 len = readlink(linkname, fname, MAXNAMELEN - 1);
 753                 if (len < 0) {
 754                     afs_snprintf(filename, sizeof filename, "%s" OS_DIRSEP "%s%d",
 755                                  rootdir, OFILE, vn.vnode);
 756                 } else {
 757                     fname[len] = '\0';
 758                     afs_snprintf(filename, sizeof filename, "%s" OS_DIRSEP "%s",
 759                                  parentdir, fname);
 760                 }
 761
 762                 /* Read the link in, delete it, and then create it */
 763                 readdata(buf, vn.dataSize);
 764
 765                 /* If a mountpoint, change its link path to mountroot */
 766                 s = strlen(buf);
 767                 if (((buf[0] == '%') || (buf[0] == '#'))
 768                     && (buf[s - 1] == '.')) {
 769                     /* This is a symbolic link */
 770                     buf[s - 1] = 0;     /* Remove prefix '.' */
 771                     strcpy(lname, &buf[1]);     /* Remove postfix '#' or '%' */
 772                     strcpy(buf, mntroot);
 773                     strcat(buf, lname);
 774                 }
 775
 776                 unlink(filename);
 777                 code = symlink(buf, filename);
 778                 if (code) {
 779                     fprintf(stderr,
 780                             "Error creating symlink %s -> %s  code=%d;%d\n",
 781                             filename, buf, code, errno);
 782                 }
 783
 784                 /* Remove the symbolic link */
 785                 unlink(linkname);
 786             }
 787             /*ITSASYMLINK*/
 788             else {
 789                 fprintf(stderr, "Unknown Vnode block\n");
 790             }
 791             break;
 792
 793         default:
 794             done = 1;
 795             break;
 796         }
 797     }
 798     if (vn.type == 0)
 799         inc_dump = 1;
 800
 801     return ((afs_int32) tag);
 802 }
 803
 804 static int
 805 WorkerBee(struct cmd_syndesc *as, void *arock)
 806 {
 807     int code = 0, len;
 808     afs_int32 type, count, vcount;
 809     DIR *dirP, *dirQ;
 810     struct dirent *dirE, *dirF;
 811     char name[MAXNAMELEN];
 812     char thisdir[MAXPATHLEN], *t;
 813     struct DumpHeader dh;       /* Defined in dump.h */
 814 #if 0/*ndef HAVE_GETCWD*/       /* XXX enable when autoconf happens */
 815     extern char *getwd();
 816 #define getcwd(x,y) getwd(x)
 817 #endif
 818
 819     if (as->parms[0].items) {   /* -file <dumpfile> */
 820         dumpfile = fopen(as->parms[0].items->data, "r");
 821         if (!dumpfile) {
 822             fprintf(stderr, "Cannot open '%s'. Code = %d\n",
 823                     as->parms[0].items->data, errno);
 824             goto cleanup;
 825         }
 826     } else {
 827         dumpfile = (FILE *) stdin;      /* use stdin */
 828     }
 829
 830     /* Read the dump header. From it we get the volume name */
 831     type = ntohl(readvalue(1));
 832     if (type != 1) {
 833         fprintf(stderr, "Expected DumpHeader\n");
 834         code = -1;
 835         goto cleanup;
 836     }
 837     type = ReadDumpHeader(&dh);
 838
 839     /* Get the root directory we restore to */
 840     if (as->parms[1].items) {   /* -dir <rootdir> */
 841         strcpy(rootdir, as->parms[1].items->data);
 842     } else {
 843         strcpy(rootdir, ".");
 844     }
 845     strcat(rootdir, "/");
 846
 847     /* Append the RW volume name to the root directory */
 848     strcat(rootdir, dh.volumeName);
 849     len = strlen(rootdir);
 850     if (strcmp(".backup", rootdir + len - 7) == 0) {
 851         rootdir[len - 7] = 0;
 852     } else if (strcmp(".readonly", rootdir + len - 9) == 0) {
 853         rootdir[len - 9] = 0;
 854     }
 855
 856     /* Append the extension we asked for */
 857     if (as->parms[2].items) {
 858         strcat(rootdir, as->parms[2].items->data);      /* -extension <ext> */
 859     }
 860
 861     /* The mountpoint root is either specifid in -mountpoint
 862      * or -dir or the current working dir.
 863      */
 864     if ((as->parms[3].items) || (as->parms[1].items)) { /* -mountpoint  or -dir */
 865         t = (char *)getcwd(thisdir, MAXPATHLEN);        /* remember current dir */
 866         if (!t) {
 867             fprintf(stderr,
 868                     "Cannot get pathname of current working directory: %s\n",
 869                     thisdir);
 870             code = -1;
 871             goto cleanup;
 872         }
 873         /* Change to the mount point dir */
 874         code =
 875             chdir((as->parms[3].items ? as->parms[3].items->data : as->
 876                    parms[1].items->data));
 877         if (code) {
 878             fprintf(stderr, "Mount point directory not found: Error = %d\n",
 879                     errno);
 880             goto cleanup;
 881         }
 882         t = (char *)getcwd(mntroot, MAXPATHLEN);        /* get its full pathname */
 883         if (!t) {
 884             fprintf(stderr,
 885                     "Cannot determine pathname of mount point root directory: %s\n",
 886                     mntroot);
 887             code = -1;
 888             goto cleanup;
 889         }
 890         strcat(mntroot, "/");   /* append '/' to end of it */
 891         code = chdir(thisdir);  /* return to original working dir */
 892         if (code) {
 893             fprintf(stderr, "Cannot find working directory: Error = %d\n",
 894                     errno);
 895             goto cleanup;
 896         }
 897     } else {                    /* use current directory */
 898         t = (char *)getcwd(mntroot, MAXPATHLEN);        /* get full pathname of current dir */
 899         if (!t) {
 900             fprintf(stderr,
 901                     "Cannot determine pathname of current working directory: %s\n",
 902                     mntroot);
 903             code = -1;
 904             goto cleanup;
 905         }
 906     }
 907     strcat(mntroot, "/");       /* append '/' to end of it */
 908
 909     /* Set the umask for the restore */
 910     if (as->parms[4].items) {   /* -umask */
 911         afs_int32 mask;
 912         mask = strtol(as->parms[4].items->data, 0, 8);
 913         fprintf(stderr, "Umask set to 0%03o\n", mask);
 914         umask(mask);
 915     }
 916
 917     fprintf(stderr, "Restoring volume dump of '%s' to directory '%s'.\n",
 918             dh.volumeName, rootdir);
 919     code = mkdir(rootdir, 0777);
 920     if ((code < 0) && (errno != EEXIST)) {
 921         fprintf(stderr, "Error creating directory %s  code=%d;%d\n", rootdir,
 922                 code, errno);
 923     }
 924
 925     for (count = 1; type == 2; count++) {
 926         type = ReadVolumeHeader(count);
 927         for (vcount = 1; type == 3; vcount++)
 928             type = ReadVNode(vcount);
 929     }
 930
 931     if (type != 4) {
 932         fprintf(stderr, "Expected End-of-Dump\n");
 933         code = -1;
 934         goto cleanup;
 935     }
 936
 937   cleanup:
 938     /* For incremental restores, Follow each directory link and
 939      * remove an "AFSFile" links.
 940      */
 941     if (inc_dump) {
 942         fprintf(stderr, "An incremental dump.\n");
 943         dirP = opendir(rootdir);
 944         while (dirP && (dirE = readdir(dirP))) {
 945             if (strncmp(dirE->d_name, ADIR, strlen(ADIR)) == 0) {
 946                 afs_snprintf(name, sizeof name, "%s" OS_DIRSEP "%s", rootdir,
 947                              dirE->d_name);
 948                 dirQ = opendir(name);
 949                 while (dirQ && (dirF = readdir(dirQ))) {
 950                     if (strncmp(dirF->d_name, AFILE, strlen(AFILE)) == 0) {
 951                         afs_snprintf(name, sizeof name, "%s" OS_DIRSEP "%s/%s", rootdir,
 952                                      dirE->d_name, dirF->d_name);
 953                         unlink(name);
 954                     }
 955                 }
 956                 closedir(dirQ);
 957             } else if (strncmp(dirE->d_name, AFILE, strlen(AFILE)) == 0) {
 958                 afs_snprintf(name, sizeof name, "%s" OS_DIRSEP "%s", rootdir,
 959                              dirE->d_name);
 960                 unlink(name);
 961             }
 962         }
 963         closedir(dirP);
 964     }
 965
 966     /* Now go through and remove all the directory links */
 967     dirP = opendir(rootdir);
 968     while (dirP && (dirE = readdir(dirP))) {
 969         if (strncmp(dirE->d_name, ADIR, strlen(ADIR)) == 0) {
 970             afs_snprintf(name, sizeof name, "%s" OS_DIRSEP "%s", rootdir, dirE->d_name);
 971             unlink(name);
 972         }
 973     }
 974     closedir(dirP);
 975
 976     return (code);
 977 }
 978
 979 int
 980 main(int argc, char **argv)
 981 {
 982     struct cmd_syndesc *ts;
 983
 984     setlinebuf(stdout);
 985
 986     ts = cmd_CreateSyntax(NULL, WorkerBee, NULL, "vldb check");
 987     cmd_AddParm(ts, "-file", CMD_SINGLE, CMD_OPTIONAL, "dump file");
 988     cmd_AddParm(ts, "-dir", CMD_SINGLE, CMD_OPTIONAL, "restore dir");
 989     cmd_AddParm(ts, "-extension", CMD_SINGLE, CMD_OPTIONAL, "name extension");
 990     cmd_AddParm(ts, "-mountpoint", CMD_SINGLE, CMD_OPTIONAL,
 991                 "mount point root");
 992     cmd_AddParm(ts, "-umask", CMD_SINGLE, CMD_OPTIONAL, "mode mask");
 993
 994     return cmd_Dispatch(argc, argv);
 995 }