receiver.c

   1 /*
   2  * Routines only used by the receiving process.
   3  *
   4  * Copyright (C) 1996-2000 Andrew Tridgell
   5  * Copyright (C) 1996 Paul Mackerras
   6  * Copyright (C) 2003-2009 Wayne Davison
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 3 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, visit the http://fsf.org website.
  20  */
  21
  22 #include "rsync.h"
  23
  24 extern int verbose;
  25 extern int dry_run;
  26 extern int do_xfers;
  27 extern int am_root;
  28 extern int am_server;
  29 extern int do_progress;
  30 extern int inc_recurse;
  31 extern int log_before_transfer;
  32 extern int stdout_format_has_i;
  33 extern int logfile_format_has_i;
  34 extern int csum_length;
  35 extern int read_batch;
  36 extern int write_batch;
  37 extern int batch_gen_fd;
  38 extern int protocol_version;
  39 extern int relative_paths;
  40 extern int preserve_hard_links;
  41 extern int preserve_perms;
  42 extern int preserve_xattrs;
  43 extern int basis_dir_cnt;
  44 extern int make_backups;
  45 extern int cleanup_got_literal;
  46 extern int remove_source_files;
  47 extern int append_mode;
  48 extern int sparse_files;
  49 extern int keep_partial;
  50 extern int checksum_seed;
  51 extern int inplace;
  52 extern int delay_updates;
  53 extern mode_t orig_umask;
  54 extern struct stats stats;
  55 extern char *tmpdir;
  56 extern char *partial_dir;
  57 extern char *basis_dir[MAX_BASIS_DIRS+1];
  58 extern struct file_list *cur_flist, *first_flist, *dir_flist;
  59 extern struct filter_list_struct daemon_filter_list;
  60
  61 static struct bitbag *delayed_bits = NULL;
  62 static int phase = 0, redoing = 0;
  63 static flist_ndx_list batch_redo_list;
  64 /* We're either updating the basis file or an identical copy: */
  65 static int updating_basis_or_equiv;
  66
  67 /*
  68  * get_tmpname() - create a tmp filename for a given filename
  69  *
  70  *   If a tmpdir is defined, use that as the directory to
  71  *   put it in.  Otherwise, the tmp filename is in the same
  72  *   directory as the given name.  Note that there may be no
  73  *   directory at all in the given name!
  74  *
  75  *   The tmp filename is basically the given filename with a
  76  *   dot prepended, and .XXXXXX appended (for mkstemp() to
  77  *   put its unique gunk in).  Take care to not exceed
  78  *   either the MAXPATHLEN or NAME_MAX, esp. the last, as
  79  *   the basename basically becomes 8 chars longer. In that
  80  *   case, the original name is shortened sufficiently to
  81  *   make it all fit.
  82  *
  83  *   Of course, there's no real reason for the tmp name to
  84  *   look like the original, except to satisfy us humans.
  85  *   As long as it's unique, rsync will work.
  86  */
  87
  88 int get_tmpname(char *fnametmp, const char *fname)
  89 {
  90         int maxname, added, length = 0;
  91         const char *f;
  92
  93         if (tmpdir) {
  94                 /* Note: this can't overflow, so the return value is safe */
  95                 length = strlcpy(fnametmp, tmpdir, MAXPATHLEN - 2);
  96                 fnametmp[length++] = '/';
  97         }
  98
  99         if ((f = strrchr(fname, '/')) != NULL) {
 100                 ++f;
 101                 if (!tmpdir) {
 102                         length = f - fname;
 103                         /* copy up to and including the slash */
 104                         strlcpy(fnametmp, fname, length + 1);
 105                 }
 106         } else
 107                 f = fname;
 108         fnametmp[length++] = '.';
 109
 110         /* The maxname value is bufsize, and includes space for the '\0'.
 111          * (Note that NAME_MAX get -8 for the leading '.' above.) */
 112         maxname = MIN(MAXPATHLEN - 7 - length, NAME_MAX - 8);
 113
 114         if (maxname < 1) {
 115                 rprintf(FERROR_XFER, "temporary filename too long: %s\n", fname);
 116                 fnametmp[0] = '\0';
 117                 return 0;
 118         }
 119
 120         added = strlcpy(fnametmp + length, f, maxname);
 121         if (added >= maxname)
 122                 added = maxname - 1;
 123         memcpy(fnametmp + length + added, ".XXXXXX", 8);
 124
 125         return 1;
 126 }
 127
 128 /* Opens a temporary file for writing.
 129  * Success: Writes name into fnametmp, returns fd.
 130  * Failure: Clobbers fnametmp, returns -1.
 131  * Calling cleanup_set() is the caller's job. */
 132 int open_tmpfile(char *fnametmp, const char *fname, struct file_struct *file)
 133 {
 134         int fd;
 135         mode_t added_perms;
 136
 137         if (!get_tmpname(fnametmp, fname))
 138                 return -1;
 139
 140         if (am_root < 0) {
 141                 /* For --fake-super, the file must be useable by the copying
 142                  * user, just like it would be for root. */
 143                 added_perms = S_IRUSR|S_IWUSR;
 144         } else {
 145                 /* For a normal copy, we need to be able to tweak things like xattrs. */
 146                 added_perms = S_IWUSR;
 147         }
 148
 149         /* We initially set the perms without the setuid/setgid bits or group
 150          * access to ensure that there is no race condition.  They will be
 151          * correctly updated after the right owner and group info is set.
 152          * (Thanks to snabb@epipe.fi for pointing this out.) */
 153         fd = do_mkstemp(fnametmp, (file->mode|added_perms) & INITACCESSPERMS);
 154
 155 #if 0
 156         /* In most cases parent directories will already exist because their
 157          * information should have been previously transferred, but that may
 158          * not be the case with -R */
 159         if (fd == -1 && relative_paths && errno == ENOENT
 160             && create_directory_path(fnametmp) == 0) {
 161                 /* Get back to name with XXXXXX in it. */
 162                 get_tmpname(fnametmp, fname);
 163                 fd = do_mkstemp(fnametmp, (file->mode|added_perms) & INITACCESSPERMS);
 164         }
 165 #endif
 166
 167         if (fd == -1) {
 168                 rsyserr(FERROR_XFER, errno, "mkstemp %s failed",
 169                         full_fname(fnametmp));
 170                 return -1;
 171         }
 172
 173         return fd;
 174 }
 175
 176 static int receive_data(int f_in, char *fname_r, int fd_r, OFF_T size_r,
 177                         const char *fname, int fd, OFF_T total_size)
 178 {
 179         static char file_sum1[MAX_DIGEST_LEN];
 180         static char file_sum2[MAX_DIGEST_LEN];
 181         struct map_struct *mapbuf;
 182         struct sum_struct sum;
 183         int32 len, sum_len;
 184         OFF_T offset = 0;
 185         OFF_T offset2;
 186         char *data;
 187         int32 i;
 188         char *map = NULL;
 189
 190         read_sum_head(f_in, &sum);
 191
 192         if (fd_r >= 0 && size_r > 0) {
 193                 int32 read_size = MAX(sum.blength * 2, 16*1024);
 194                 mapbuf = map_file(fd_r, size_r, read_size, sum.blength);
 195                 if (verbose > 2) {
 196                         rprintf(FINFO, "recv mapped %s of size %.0f\n",
 197                                 fname_r, (double)size_r);
 198                 }
 199         } else
 200                 mapbuf = NULL;
 201
 202         sum_init(checksum_seed);
 203
 204         if (append_mode > 0) {
 205                 OFF_T j;
 206                 sum.flength = (OFF_T)sum.count * sum.blength;
 207                 if (sum.remainder)
 208                         sum.flength -= sum.blength - sum.remainder;
 209                 if (append_mode == 2) {
 210                         for (j = CHUNK_SIZE; j < sum.flength; j += CHUNK_SIZE) {
 211                                 if (do_progress)
 212                                         show_progress(offset, total_size);
 213                                 sum_update(map_ptr(mapbuf, offset, CHUNK_SIZE),
 214                                            CHUNK_SIZE);
 215                                 offset = j;
 216                         }
 217                         if (offset < sum.flength) {
 218                                 int32 len = (int32)(sum.flength - offset);
 219                                 if (do_progress)
 220                                         show_progress(offset, total_size);
 221                                 sum_update(map_ptr(mapbuf, offset, len), len);
 222                         }
 223                 }
 224                 offset = sum.flength;
 225                 if (fd != -1 && (j = do_lseek(fd, offset, SEEK_SET)) != offset) {
 226                         rsyserr(FERROR_XFER, errno, "lseek of %s returned %.0f, not %.0f",
 227                                 full_fname(fname), (double)j, (double)offset);
 228                         exit_cleanup(RERR_FILEIO);
 229                 }
 230         }
 231
 232         while ((i = recv_token(f_in, &data)) != 0) {
 233                 if (do_progress)
 234                         show_progress(offset, total_size);
 235
 236                 if (i > 0) {
 237                         if (verbose > 3) {
 238                                 rprintf(FINFO,"data recv %d at %.0f\n",
 239                                         i,(double)offset);
 240                         }
 241
 242                         stats.literal_data += i;
 243                         cleanup_got_literal = 1;
 244
 245                         sum_update(data, i);
 246
 247                         if (fd != -1 && write_file(fd,data,i) != i)
 248                                 goto report_write_error;
 249                         offset += i;
 250                         continue;
 251                 }
 252
 253                 i = -(i+1);
 254                 offset2 = i * (OFF_T)sum.blength;
 255                 len = sum.blength;
 256                 if (i == (int)sum.count-1 && sum.remainder != 0)
 257                         len = sum.remainder;
 258
 259                 stats.matched_data += len;
 260
 261                 if (verbose > 3) {
 262                         rprintf(FINFO,
 263                                 "chunk[%d] of size %ld at %.0f offset=%.0f%s\n",
 264                                 i, (long)len, (double)offset2, (double)offset,
 265                                 updating_basis_or_equiv && offset == offset2 ? " (seek)" : "");
 266                 }
 267
 268                 if (mapbuf) {
 269                         map = map_ptr(mapbuf,offset2,len);
 270
 271                         see_token(map, len);
 272                         sum_update(map, len);
 273                 }
 274
 275                 if (updating_basis_or_equiv) {
 276                         if (offset == offset2 && fd != -1) {
 277                                 OFF_T pos;
 278                                 if (flush_write_file(fd) < 0)
 279                                         goto report_write_error;
 280                                 offset += len;
 281                                 if ((pos = do_lseek(fd, len, SEEK_CUR)) != offset) {
 282                                         rsyserr(FERROR_XFER, errno,
 283                                                 "lseek of %s returned %.0f, not %.0f",
 284                                                 full_fname(fname),
 285                                                 (double)pos, (double)offset);
 286                                         exit_cleanup(RERR_FILEIO);
 287                                 }
 288                                 continue;
 289                         }
 290                 }
 291                 if (fd != -1 && map && write_file(fd, map, len) != (int)len)
 292                         goto report_write_error;
 293                 offset += len;
 294         }
 295
 296         if (flush_write_file(fd) < 0)
 297                 goto report_write_error;
 298
 299 #ifdef HAVE_FTRUNCATE
 300         if (inplace && fd != -1
 301          && ftruncate(fd, offset) < 0) {
 302                 rsyserr(FERROR_XFER, errno, "ftruncate failed on %s",
 303                         full_fname(fname));
 304         }
 305 #endif
 306
 307         if (do_progress)
 308                 end_progress(total_size);
 309
 310         if (fd != -1 && offset > 0 && sparse_end(fd) != 0) {
 311             report_write_error:
 312                 rsyserr(FERROR_XFER, errno, "write failed on %s",
 313                         full_fname(fname));
 314                 exit_cleanup(RERR_FILEIO);
 315         }
 316
 317         sum_len = sum_end(file_sum1);
 318
 319         if (mapbuf)
 320                 unmap_file(mapbuf);
 321
 322         read_buf(f_in, file_sum2, sum_len);
 323         if (verbose > 2)
 324                 rprintf(FINFO,"got file_sum\n");
 325         if (fd != -1 && memcmp(file_sum1, file_sum2, sum_len) != 0)
 326                 return 0;
 327         return 1;
 328 }
 329
 330
 331 static void discard_receive_data(int f_in, OFF_T length)
 332 {
 333         receive_data(f_in, NULL, -1, 0, NULL, -1, length);
 334 }
 335
 336 static void handle_delayed_updates(char *local_name)
 337 {
 338         char *fname, *partialptr;
 339         int ndx;
 340
 341         for (ndx = -1; (ndx = bitbag_next_bit(delayed_bits, ndx)) >= 0; ) {
 342                 struct file_struct *file = cur_flist->files[ndx];
 343                 fname = local_name ? local_name : f_name(file, NULL);
 344                 if ((partialptr = partial_dir_fname(fname)) != NULL) {
 345                         if (make_backups > 0 && !make_backup(fname))
 346                                 continue;
 347                         if (verbose > 2) {
 348                                 rprintf(FINFO, "renaming %s to %s\n",
 349                                         partialptr, fname);
 350                         }
 351                         /* We don't use robust_rename() here because the
 352                          * partial-dir must be on the same drive. */
 353                         if (do_rename(partialptr, fname) < 0) {
 354                                 rsyserr(FERROR_XFER, errno,
 355                                         "rename failed for %s (from %s)",
 356                                         full_fname(fname), partialptr);
 357                         } else {
 358                                 if (remove_source_files
 359                                  || (preserve_hard_links && F_IS_HLINKED(file)))
 360                                         send_msg_int(MSG_SUCCESS, ndx);
 361                                 handle_partial_dir(partialptr, PDIR_DELETE);
 362                         }
 363                 }
 364         }
 365 }
 366
 367 static void no_batched_update(int ndx, BOOL is_redo)
 368 {
 369         struct file_list *flist = flist_for_ndx(ndx, "no_batched_update");
 370         struct file_struct *file = flist->files[ndx - flist->ndx_start];
 371
 372         rprintf(FERROR_XFER, "(No batched update for%s \"%s\")\n",
 373                 is_redo ? " resend of" : "", f_name(file, NULL));
 374
 375         if (inc_recurse && !dry_run)
 376                 send_msg_int(MSG_NO_SEND, ndx);
 377 }
 378
 379 static int we_want_redo(int desired_ndx)
 380 {
 381         static int redo_ndx = -1;
 382
 383         while (redo_ndx < desired_ndx) {
 384                 if (redo_ndx >= 0)
 385                         no_batched_update(redo_ndx, True);
 386                 if ((redo_ndx = flist_ndx_pop(&batch_redo_list)) < 0)
 387                         return 0;
 388         }
 389
 390         if (redo_ndx == desired_ndx) {
 391                 redo_ndx = -1;
 392                 return 1;
 393         }
 394
 395         return 0;
 396 }
 397
 398 static int gen_wants_ndx(int desired_ndx)
 399 {
 400         static int next_ndx = -1;
 401         static int done_cnt = 0;
 402         static BOOL got_eof = False;
 403         int flist_num = first_flist->flist_num;
 404
 405         if (got_eof)
 406                 return 0;
 407
 408         while (next_ndx < desired_ndx) {
 409                 if (inc_recurse && flist_num <= done_cnt)
 410                         return 0;
 411                 if (next_ndx >= 0)
 412                         no_batched_update(next_ndx, False);
 413                 if ((next_ndx = read_int(batch_gen_fd)) < 0) {
 414                         if (inc_recurse) {
 415                                 done_cnt++;
 416                                 continue;
 417                         }
 418                         got_eof = True;
 419                         return 0;
 420                 }
 421         }
 422
 423         if (next_ndx == desired_ndx) {
 424                 next_ndx = -1;
 425                 return 1;
 426         }
 427
 428         return 0;
 429 }
 430
 431 /**
 432  * main routine for receiver process.
 433  *
 434  * Receiver process runs on the same host as the generator process. */
 435 int recv_files(int f_in, char *local_name)
 436 {
 437         int fd1,fd2;
 438         STRUCT_STAT st;
 439         int iflags, xlen;
 440         char *fname, fbuf[MAXPATHLEN];
 441         char xname[MAXPATHLEN];
 442         char fnametmp[MAXPATHLEN];
 443         char *fnamecmp, *partialptr;
 444         char fnamecmpbuf[MAXPATHLEN];
 445         uchar fnamecmp_type;
 446         struct file_struct *file;
 447         struct stats initial_stats;
 448         int itemizing = am_server ? logfile_format_has_i : stdout_format_has_i;
 449         enum logcode log_code = log_before_transfer ? FLOG : FINFO;
 450         int max_phase = protocol_version >= 29 ? 2 : 1;
 451         int dflt_perms = (ACCESSPERMS & ~orig_umask);
 452 #ifdef SUPPORT_ACLS
 453         const char *parent_dirname = "";
 454 #endif
 455         int ndx, recv_ok;
 456
 457         if (verbose > 2)
 458                 rprintf(FINFO, "recv_files(%d) starting\n", cur_flist->used);
 459
 460         if (delay_updates)
 461                 delayed_bits = bitbag_create(cur_flist->used + 1);
 462
 463         while (1) {
 464                 cleanup_disable();
 465
 466                 /* This call also sets cur_flist. */
 467                 ndx = read_ndx_and_attrs(f_in, &iflags, &fnamecmp_type,
 468                                          xname, &xlen);
 469                 if (ndx == NDX_DONE) {
 470                         if (inc_recurse && first_flist) {
 471                                 if (read_batch)
 472                                         gen_wants_ndx(first_flist->used + first_flist->ndx_start);
 473                                 flist_free(first_flist);
 474                                 if (first_flist)
 475                                         continue;
 476                         } else if (read_batch && first_flist)
 477                                 gen_wants_ndx(first_flist->used);
 478                         if (++phase > max_phase)
 479                                 break;
 480                         if (verbose > 2)
 481                                 rprintf(FINFO, "recv_files phase=%d\n", phase);
 482                         if (phase == 2 && delay_updates)
 483                                 handle_delayed_updates(local_name);
 484                         send_msg(MSG_DONE, "", 0, 0);
 485                         continue;
 486                 }
 487
 488                 if (ndx - cur_flist->ndx_start >= 0)
 489                         file = cur_flist->files[ndx - cur_flist->ndx_start];
 490                 else
 491                         file = dir_flist->files[cur_flist->parent_ndx];
 492                 fname = local_name ? local_name : f_name(file, fbuf);
 493
 494                 if (verbose > 2)
 495                         rprintf(FINFO, "recv_files(%s)\n", fname);
 496
 497 #ifdef SUPPORT_XATTRS
 498                 if (iflags & ITEM_REPORT_XATTR && do_xfers)
 499                         recv_xattr_request(file, f_in);
 500 #endif
 501
 502                 if (!(iflags & ITEM_TRANSFER)) {
 503                         maybe_log_item(file, iflags, itemizing, xname);
 504 #ifdef SUPPORT_XATTRS
 505                         if (preserve_xattrs && iflags & ITEM_REPORT_XATTR && do_xfers)
 506                                 set_file_attrs(fname, file, NULL, fname, 0);
 507 #endif
 508                         continue;
 509                 }
 510                 if (phase == 2) {
 511                         rprintf(FERROR,
 512                                 "got transfer request in phase 2 [%s]\n",
 513                                 who_am_i());
 514                         exit_cleanup(RERR_PROTOCOL);
 515                 }
 516
 517                 if (file->flags & FLAG_FILE_SENT) {
 518                         if (csum_length == SHORT_SUM_LENGTH) {
 519                                 if (keep_partial && !partial_dir)
 520                                         make_backups = -make_backups; /* prevents double backup */
 521                                 if (append_mode)
 522                                         sparse_files = -sparse_files;
 523                                 append_mode = -append_mode;
 524                                 csum_length = SUM_LENGTH;
 525                                 redoing = 1;
 526                         }
 527                 } else {
 528                         if (csum_length != SHORT_SUM_LENGTH) {
 529                                 if (keep_partial && !partial_dir)
 530                                         make_backups = -make_backups;
 531                                 if (append_mode)
 532                                         sparse_files = -sparse_files;
 533                                 append_mode = -append_mode;
 534                                 csum_length = SHORT_SUM_LENGTH;
 535                                 redoing = 0;
 536                         }
 537                 }
 538
 539                 if (!am_server && do_progress)
 540                         set_current_file_index(file, ndx);
 541                 stats.num_transferred_files++;
 542                 stats.total_transferred_size += F_LENGTH(file);
 543
 544                 cleanup_got_literal = 0;
 545
 546                 if (daemon_filter_list.head
 547                     && check_filter(&daemon_filter_list, FLOG, fname, 0) < 0) {
 548                         rprintf(FERROR, "attempt to hack rsync failed.\n");
 549                         exit_cleanup(RERR_PROTOCOL);
 550                 }
 551
 552                 if (read_batch) {
 553                         int wanted = redoing
 554                                    ? we_want_redo(ndx)
 555                                    : gen_wants_ndx(ndx);
 556                         if (!wanted) {
 557                                 rprintf(FINFO,
 558                                         "(Skipping batched update for%s \"%s\")\n",
 559                                         redoing ? " resend of" : "",
 560                                         fname);
 561                                 discard_receive_data(f_in, F_LENGTH(file));
 562                                 file->flags |= FLAG_FILE_SENT;
 563                                 continue;
 564                         }
 565                 }
 566
 567                 if (!do_xfers) { /* log the transfer */
 568                         log_item(FCLIENT, file, &stats, iflags, NULL);
 569                         if (read_batch)
 570                                 discard_receive_data(f_in, F_LENGTH(file));
 571                         continue;
 572                 }
 573                 if (write_batch < 0) {
 574                         log_item(FCLIENT, file, &stats, iflags, NULL);
 575                         if (!am_server)
 576                                 discard_receive_data(f_in, F_LENGTH(file));
 577                         continue;
 578                 }
 579
 580                 partialptr = partial_dir ? partial_dir_fname(fname) : fname;
 581
 582                 if (protocol_version >= 29) {
 583                         switch (fnamecmp_type) {
 584                         case FNAMECMP_FNAME:
 585                                 fnamecmp = fname;
 586                                 break;
 587                         case FNAMECMP_PARTIAL_DIR:
 588                                 fnamecmp = partialptr;
 589                                 break;
 590                         case FNAMECMP_BACKUP:
 591                                 fnamecmp = get_backup_name(fname);
 592                                 break;
 593                         case FNAMECMP_FUZZY:
 594                                 if (file->dirname) {
 595                                         pathjoin(fnamecmpbuf, MAXPATHLEN,
 596                                                  file->dirname, xname);
 597                                         fnamecmp = fnamecmpbuf;
 598                                 } else
 599                                         fnamecmp = xname;
 600                                 break;
 601                         default:
 602                                 if (fnamecmp_type >= basis_dir_cnt) {
 603                                         rprintf(FERROR,
 604                                                 "invalid basis_dir index: %d.\n",
 605                                                 fnamecmp_type);
 606                                         exit_cleanup(RERR_PROTOCOL);
 607                                 }
 608                                 pathjoin(fnamecmpbuf, sizeof fnamecmpbuf,
 609                                          basis_dir[fnamecmp_type], fname);
 610                                 fnamecmp = fnamecmpbuf;
 611                                 break;
 612                         }
 613                         if (!fnamecmp || (daemon_filter_list.head
 614                           && check_filter(&daemon_filter_list, FLOG, fname, 0) < 0)) {
 615                                 fnamecmp = fname;
 616                                 fnamecmp_type = FNAMECMP_FNAME;
 617                         }
 618                 } else {
 619                         /* Reminder: --inplace && --partial-dir are never
 620                          * enabled at the same time. */
 621                         if (inplace && make_backups > 0) {
 622                                 if (!(fnamecmp = get_backup_name(fname)))
 623                                         fnamecmp = fname;
 624                                 else
 625                                         fnamecmp_type = FNAMECMP_BACKUP;
 626                         } else if (partial_dir && partialptr)
 627                                 fnamecmp = partialptr;
 628                         else
 629                                 fnamecmp = fname;
 630                 }
 631
 632                 initial_stats = stats;
 633
 634                 /* open the file */
 635                 fd1 = do_open(fnamecmp, O_RDONLY, 0);
 636
 637                 if (fd1 == -1 && protocol_version < 29) {
 638                         if (fnamecmp != fname) {
 639                                 fnamecmp = fname;
 640                                 fd1 = do_open(fnamecmp, O_RDONLY, 0);
 641                         }
 642
 643                         if (fd1 == -1 && basis_dir[0]) {
 644                                 /* pre-29 allowed only one alternate basis */
 645                                 pathjoin(fnamecmpbuf, sizeof fnamecmpbuf,
 646                                          basis_dir[0], fname);
 647                                 fnamecmp = fnamecmpbuf;
 648                                 fd1 = do_open(fnamecmp, O_RDONLY, 0);
 649                         }
 650                 }
 651
 652                 updating_basis_or_equiv = inplace
 653                     && (fnamecmp == fname || fnamecmp_type == FNAMECMP_BACKUP);
 654
 655                 if (fd1 == -1) {
 656                         st.st_mode = 0;
 657                         st.st_size = 0;
 658                 } else if (do_fstat(fd1,&st) != 0) {
 659                         rsyserr(FERROR_XFER, errno, "fstat %s failed",
 660                                 full_fname(fnamecmp));
 661                         discard_receive_data(f_in, F_LENGTH(file));
 662                         close(fd1);
 663                         if (inc_recurse)
 664                                 send_msg_int(MSG_NO_SEND, ndx);
 665                         continue;
 666                 }
 667
 668                 if (fd1 != -1 && S_ISDIR(st.st_mode) && fnamecmp == fname) {
 669                         /* this special handling for directories
 670                          * wouldn't be necessary if robust_rename()
 671                          * and the underlying robust_unlink could cope
 672                          * with directories
 673                          */
 674                         rprintf(FERROR_XFER, "recv_files: %s is a directory\n",
 675                                 full_fname(fnamecmp));
 676                         discard_receive_data(f_in, F_LENGTH(file));
 677                         close(fd1);
 678                         if (inc_recurse)
 679                                 send_msg_int(MSG_NO_SEND, ndx);
 680                         continue;
 681                 }
 682
 683                 if (fd1 != -1 && !S_ISREG(st.st_mode)) {
 684                         close(fd1);
 685                         fd1 = -1;
 686                 }
 687
 688                 /* If we're not preserving permissions, change the file-list's
 689                  * mode based on the local permissions and some heuristics. */
 690                 if (!preserve_perms) {
 691                         int exists = fd1 != -1;
 692 #ifdef SUPPORT_ACLS
 693                         const char *dn = file->dirname ? file->dirname : ".";
 694                         if (parent_dirname != dn
 695                          && strcmp(parent_dirname, dn) != 0) {
 696                                 dflt_perms = default_perms_for_dir(dn);
 697                                 parent_dirname = dn;
 698                         }
 699 #endif
 700                         file->mode = dest_mode(file->mode, st.st_mode,
 701                                                dflt_perms, exists);
 702                 }
 703
 704                 /* We now check to see if we are writing the file "inplace" */
 705                 if (inplace)  {
 706                         fd2 = do_open(fname, O_WRONLY|O_CREAT, 0600);
 707                         if (fd2 == -1) {
 708                                 rsyserr(FERROR_XFER, errno, "open %s failed",
 709                                         full_fname(fname));
 710                         }
 711                 } else {
 712                         fd2 = open_tmpfile(fnametmp, fname, file);
 713                         if (fd2 != -1)
 714                                 cleanup_set(fnametmp, partialptr, file, fd1, fd2);
 715                 }
 716
 717                 if (fd2 == -1) {
 718                         discard_receive_data(f_in, F_LENGTH(file));
 719                         if (fd1 != -1)
 720                                 close(fd1);
 721                         if (inc_recurse)
 722                                 send_msg_int(MSG_NO_SEND, ndx);
 723                         continue;
 724                 }
 725
 726                 /* log the transfer */
 727                 if (log_before_transfer)
 728                         log_item(FCLIENT, file, &initial_stats, iflags, NULL);
 729                 else if (!am_server && verbose && do_progress)
 730                         rprintf(FINFO, "%s\n", fname);
 731
 732                 /* recv file data */
 733                 recv_ok = receive_data(f_in, fnamecmp, fd1, st.st_size,
 734                                        fname, fd2, F_LENGTH(file));
 735
 736                 log_item(log_code, file, &initial_stats, iflags, NULL);
 737
 738                 if (fd1 != -1)
 739                         close(fd1);
 740                 if (close(fd2) < 0) {
 741                         rsyserr(FERROR, errno, "close failed on %s",
 742                                 full_fname(fnametmp));
 743                         exit_cleanup(RERR_FILEIO);
 744                 }
 745
 746                 if ((recv_ok && (!delay_updates || !partialptr)) || inplace) {
 747                         if (partialptr == fname)
 748                                 partialptr = NULL;
 749                         if (!finish_transfer(fname, fnametmp, fnamecmp,
 750                                              partialptr, file, recv_ok, 1))
 751                                 recv_ok = -1;
 752                         else if (fnamecmp == partialptr) {
 753                                 do_unlink(partialptr);
 754                                 handle_partial_dir(partialptr, PDIR_DELETE);
 755                         }
 756                 } else if (keep_partial && partialptr) {
 757                         if (!handle_partial_dir(partialptr, PDIR_CREATE)) {
 758                                 rprintf(FERROR,
 759                                     "Unable to create partial-dir for %s -- discarding %s.\n",
 760                                     local_name ? local_name : f_name(file, NULL),
 761                                     recv_ok ? "completed file" : "partial file");
 762                                 do_unlink(fnametmp);
 763                                 recv_ok = -1;
 764                         } else if (!finish_transfer(partialptr, fnametmp, fnamecmp, NULL,
 765                                                     file, recv_ok, !partial_dir))
 766                                 recv_ok = -1;
 767                         else if (delay_updates && recv_ok) {
 768                                 bitbag_set_bit(delayed_bits, ndx);
 769                                 recv_ok = 2;
 770                         } else
 771                                 partialptr = NULL;
 772                 } else
 773                         do_unlink(fnametmp);
 774
 775                 cleanup_disable();
 776
 777                 if (read_batch)
 778                         file->flags |= FLAG_FILE_SENT;
 779
 780                 switch (recv_ok) {
 781                 case 2:
 782                         break;
 783                 case 1:
 784                         if (remove_source_files || inc_recurse
 785                          || (preserve_hard_links && F_IS_HLINKED(file)))
 786                                 send_msg_int(MSG_SUCCESS, ndx);
 787                         break;
 788                 case 0: {
 789                         enum logcode msgtype = redoing ? FERROR_XFER : FWARNING;
 790                         if (msgtype == FERROR_XFER || verbose) {
 791                                 char *errstr, *redostr, *keptstr;
 792                                 if (!(keep_partial && partialptr) && !inplace)
 793                                         keptstr = "discarded";
 794                                 else if (partial_dir)
 795                                         keptstr = "put into partial-dir";
 796                                 else
 797                                         keptstr = "retained";
 798                                 if (msgtype == FERROR_XFER) {
 799                                         errstr = "ERROR";
 800                                         redostr = "";
 801                                 } else {
 802                                         errstr = "WARNING";
 803                                         redostr = read_batch ? " (may try again)"
 804                                                              : " (will try again)";
 805                                 }
 806                                 rprintf(msgtype,
 807                                         "%s: %s failed verification -- update %s%s.\n",
 808                                         errstr, local_name ? f_name(file, NULL) : fname,
 809                                         keptstr, redostr);
 810                         }
 811                         if (!redoing) {
 812                                 if (read_batch)
 813                                         flist_ndx_push(&batch_redo_list, ndx);
 814                                 send_msg_int(MSG_REDO, ndx);
 815                                 file->flags |= FLAG_FILE_SENT;
 816                         } else if (inc_recurse)
 817                                 send_msg_int(MSG_NO_SEND, ndx);
 818                         break;
 819                     }
 820                 case -1:
 821                         if (inc_recurse)
 822                                 send_msg_int(MSG_NO_SEND, ndx);
 823                         break;
 824                 }
 825         }
 826         if (make_backups < 0)
 827                 make_backups = -make_backups;
 828
 829         if (phase == 2 && delay_updates) /* for protocol_version < 29 */
 830                 handle_delayed_updates(local_name);
 831
 832         if (verbose > 2)
 833                 rprintf(FINFO,"recv_files finished\n");
 834
 835         return 0;
 836 }