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) 2003-2008 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 #include "inums.h"
  24
  25 extern int dry_run;
  26 extern int do_xfers;
  27 extern int am_server;
  28 extern int inc_recurse;
  29 extern int log_before_transfer;
  30 extern int stdout_format_has_i;
  31 extern int logfile_format_has_i;
  32 extern int csum_length;
  33 extern int read_batch;
  34 extern int write_batch;
  35 extern int batch_gen_fd;
  36 extern int protocol_version;
  37 extern int relative_paths;
  38 extern int preserve_hard_links;
  39 extern int preserve_perms;
  40 extern int preserve_xattrs;
  41 extern int basis_dir_cnt;
  42 extern int make_backups;
  43 extern int cleanup_got_literal;
  44 extern int remove_source_files;
  45 extern int append_mode;
  46 extern int sparse_files;
  47 extern int keep_partial;
  48 extern int checksum_len;
  49 extern int checksum_seed;
  50 extern int inplace;
  51 extern int delay_updates;
  52 extern mode_t orig_umask;
  53 extern struct stats stats;
  54 extern char *tmpdir;
  55 extern char *partial_dir;
  56 extern char *basis_dir[MAX_BASIS_DIRS+1];
  57 extern char sender_file_sum[MAX_DIGEST_LEN];
  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
 136         if (!get_tmpname(fnametmp, fname))
 137                 return -1;
 138
 139         /* We initially set the perms without the setuid/setgid bits or group
 140          * access to ensure that there is no race condition.  They will be
 141          * correctly updated after the right owner and group info is set.
 142          * (Thanks to snabb@epipe.fi for pointing this out.) */
 143         fd = do_mkstemp(fnametmp, file->mode & INITACCESSPERMS);
 144
 145 #if 0
 146         /* In most cases parent directories will already exist because their
 147          * information should have been previously transferred, but that may
 148          * not be the case with -R */
 149         if (fd == -1 && relative_paths && errno == ENOENT
 150             && create_directory_path(fnametmp) == 0) {
 151                 /* Get back to name with XXXXXX in it. */
 152                 get_tmpname(fnametmp, fname);
 153                 fd = do_mkstemp(fnametmp, file->mode & INITACCESSPERMS);
 154         }
 155 #endif
 156
 157         if (fd == -1) {
 158                 rsyserr(FERROR_XFER, errno, "mkstemp %s failed",
 159                         full_fname(fnametmp));
 160                 return -1;
 161         }
 162
 163         return fd;
 164 }
 165
 166 static int receive_data(int f_in, char *fname_r, int fd_r, OFF_T size_r,
 167                         const char *fname, int fd, OFF_T total_size)
 168 {
 169         static char file_sum1[MAX_DIGEST_LEN];
 170         struct map_struct *mapbuf;
 171         struct sum_struct sum;
 172         int32 len;
 173         OFF_T offset = 0;
 174         OFF_T offset2;
 175         char *data;
 176         int32 i;
 177         char *map = NULL;
 178
 179         read_sum_head(f_in, &sum);
 180
 181         if (fd_r >= 0 && size_r > 0) {
 182                 int32 read_size = MAX(sum.blength * 2, 16*1024);
 183                 mapbuf = map_file(fd_r, size_r, read_size, sum.blength);
 184                 if (DEBUG_GTE(DELTASUM, 2)) {
 185                         rprintf(FINFO, "recv mapped %s of size %s\n",
 186                                 fname_r, big_num(size_r));
 187                 }
 188         } else
 189                 mapbuf = NULL;
 190
 191         sum_init(checksum_seed);
 192
 193         if (append_mode > 0) {
 194                 OFF_T j;
 195                 sum.flength = (OFF_T)sum.count * sum.blength;
 196                 if (sum.remainder)
 197                         sum.flength -= sum.blength - sum.remainder;
 198                 if (append_mode == 2) {
 199                         for (j = CHUNK_SIZE; j < sum.flength; j += CHUNK_SIZE) {
 200                                 if (INFO_GTE(PROGRESS, 1))
 201                                         show_progress(offset, total_size);
 202                                 sum_update(map_ptr(mapbuf, offset, CHUNK_SIZE),
 203                                            CHUNK_SIZE);
 204                                 offset = j;
 205                         }
 206                         if (offset < sum.flength) {
 207                                 int32 len = (int32)(sum.flength - offset);
 208                                 if (INFO_GTE(PROGRESS, 1))
 209                                         show_progress(offset, total_size);
 210                                 sum_update(map_ptr(mapbuf, offset, len), len);
 211                         }
 212                 }
 213                 offset = sum.flength;
 214                 if (fd != -1 && (j = do_lseek(fd, offset, SEEK_SET)) != offset) {
 215                         rsyserr(FERROR_XFER, errno, "lseek of %s returned %s, not %s",
 216                                 full_fname(fname), big_num(j), big_num(offset));
 217                         exit_cleanup(RERR_FILEIO);
 218                 }
 219         }
 220
 221         while ((i = recv_token(f_in, &data)) != 0) {
 222                 if (INFO_GTE(PROGRESS, 1))
 223                         show_progress(offset, total_size);
 224
 225                 if (i > 0) {
 226                         if (DEBUG_GTE(DELTASUM, 3)) {
 227                                 rprintf(FINFO,"data recv %d at %s\n",
 228                                         i, big_num(offset));
 229                         }
 230
 231                         stats.literal_data += i;
 232                         cleanup_got_literal = 1;
 233
 234                         sum_update(data, i);
 235
 236                         if (fd != -1 && write_file(fd,data,i) != i)
 237                                 goto report_write_error;
 238                         offset += i;
 239                         continue;
 240                 }
 241
 242                 i = -(i+1);
 243                 offset2 = i * (OFF_T)sum.blength;
 244                 len = sum.blength;
 245                 if (i == (int)sum.count-1 && sum.remainder != 0)
 246                         len = sum.remainder;
 247
 248                 stats.matched_data += len;
 249
 250                 if (DEBUG_GTE(DELTASUM, 3)) {
 251                         rprintf(FINFO,
 252                                 "chunk[%d] of size %ld at %s offset=%s\n",
 253                                 i, (long)len, big_num(offset2), big_num(offset));
 254                 }
 255
 256                 if (mapbuf) {
 257                         map = map_ptr(mapbuf,offset2,len);
 258
 259                         see_token(map, len);
 260                         sum_update(map, len);
 261                 }
 262
 263                 if (updating_basis_or_equiv) {
 264                         if (offset == offset2 && fd != -1) {
 265                                 OFF_T pos;
 266                                 if (flush_write_file(fd) < 0)
 267                                         goto report_write_error;
 268                                 offset += len;
 269                                 if ((pos = do_lseek(fd, len, SEEK_CUR)) != offset) {
 270                                         rsyserr(FERROR_XFER, errno,
 271                                                 "lseek of %s returned %s, not %s",
 272                                                 full_fname(fname),
 273                                                 big_num(pos), big_num(offset));
 274                                         exit_cleanup(RERR_FILEIO);
 275                                 }
 276                                 continue;
 277                         }
 278                 }
 279                 if (fd != -1 && map && write_file(fd, map, len) != (int)len)
 280                         goto report_write_error;
 281                 offset += len;
 282         }
 283
 284         if (flush_write_file(fd) < 0)
 285                 goto report_write_error;
 286
 287 #ifdef HAVE_FTRUNCATE
 288         if (inplace && fd != -1
 289          && ftruncate(fd, offset) < 0) {
 290                 rsyserr(FERROR_XFER, errno, "ftruncate failed on %s",
 291                         full_fname(fname));
 292         }
 293 #endif
 294
 295         if (INFO_GTE(PROGRESS, 1))
 296                 end_progress(total_size);
 297
 298         if (fd != -1 && offset > 0 && sparse_end(fd) != 0) {
 299             report_write_error:
 300                 rsyserr(FERROR_XFER, errno, "write failed on %s",
 301                         full_fname(fname));
 302                 exit_cleanup(RERR_FILEIO);
 303         }
 304
 305         if (sum_end(file_sum1) != checksum_len)
 306                 overflow_exit("checksum_len"); /* Impossible... */
 307
 308         if (mapbuf)
 309                 unmap_file(mapbuf);
 310
 311         read_buf(f_in, sender_file_sum, checksum_len);
 312         if (DEBUG_GTE(DELTASUM, 2))
 313                 rprintf(FINFO,"got file_sum\n");
 314         if (fd != -1 && memcmp(file_sum1, sender_file_sum, checksum_len) != 0)
 315                 return 0;
 316         return 1;
 317 }
 318
 319
 320 static void discard_receive_data(int f_in, OFF_T length)
 321 {
 322         receive_data(f_in, NULL, -1, 0, NULL, -1, length);
 323 }
 324
 325 static void handle_delayed_updates(char *local_name)
 326 {
 327         char *fname, *partialptr;
 328         int ndx;
 329
 330         for (ndx = -1; (ndx = bitbag_next_bit(delayed_bits, ndx)) >= 0; ) {
 331                 struct file_struct *file = cur_flist->files[ndx];
 332                 fname = local_name ? local_name : f_name(file, NULL);
 333                 if ((partialptr = partial_dir_fname(fname)) != NULL) {
 334                         if (make_backups > 0 && !make_backup(fname))
 335                                 continue;
 336                         if (DEBUG_GTE(RECV, 1)) {
 337                                 rprintf(FINFO, "renaming %s to %s\n",
 338                                         partialptr, fname);
 339                         }
 340                         /* We don't use robust_rename() here because the
 341                          * partial-dir must be on the same drive. */
 342                         if (do_rename(partialptr, fname) < 0) {
 343                                 rsyserr(FERROR_XFER, errno,
 344                                         "rename failed for %s (from %s)",
 345                                         full_fname(fname), partialptr);
 346                         } else {
 347                                 if (remove_source_files
 348                                  || (preserve_hard_links && F_IS_HLINKED(file)))
 349                                         send_msg_int(MSG_SUCCESS, ndx);
 350                                 handle_partial_dir(partialptr, PDIR_DELETE);
 351                         }
 352                 }
 353         }
 354 }
 355
 356 static void no_batched_update(int ndx, BOOL is_redo)
 357 {
 358         struct file_list *flist = flist_for_ndx(ndx, "no_batched_update");
 359         struct file_struct *file = flist->files[ndx - flist->ndx_start];
 360
 361         rprintf(FERROR_XFER, "(No batched update for%s \"%s\")\n",
 362                 is_redo ? " resend of" : "", f_name(file, NULL));
 363
 364         if (inc_recurse)
 365                 send_msg_int(MSG_NO_SEND, ndx);
 366 }
 367
 368 static int we_want_redo(int desired_ndx)
 369 {
 370         static int redo_ndx = -1;
 371
 372         while (redo_ndx < desired_ndx) {
 373                 if (redo_ndx >= 0)
 374                         no_batched_update(redo_ndx, True);
 375                 if ((redo_ndx = flist_ndx_pop(&batch_redo_list)) < 0)
 376                         return 0;
 377         }
 378
 379         if (redo_ndx == desired_ndx) {
 380                 redo_ndx = -1;
 381                 return 1;
 382         }
 383
 384         return 0;
 385 }
 386
 387 static int gen_wants_ndx(int desired_ndx)
 388 {
 389         static int next_ndx = -1;
 390         static BOOL got_eof = 0;
 391
 392         if (got_eof)
 393                 return 0;
 394
 395         while (next_ndx < desired_ndx) {
 396                 if (next_ndx >= 0)
 397                         no_batched_update(next_ndx, False);
 398                 if ((next_ndx = read_int(batch_gen_fd)) < 0) {
 399                         got_eof = True;
 400                         return 0;
 401                 }
 402         }
 403
 404         if (next_ndx == desired_ndx) {
 405                 next_ndx = -1;
 406                 return 1;
 407         }
 408
 409         return 0;
 410 }
 411
 412 /**
 413  * main routine for receiver process.
 414  *
 415  * Receiver process runs on the same host as the generator process. */
 416 int recv_files(int f_in, char *local_name)
 417 {
 418         int fd1,fd2;
 419         STRUCT_STAT st;
 420         int iflags, xlen;
 421         char *fname, fbuf[MAXPATHLEN];
 422         char xname[MAXPATHLEN];
 423         char fnametmp[MAXPATHLEN];
 424         char *fnamecmp, *partialptr;
 425         char fnamecmpbuf[MAXPATHLEN];
 426         uchar fnamecmp_type;
 427         struct file_struct *file;
 428         struct stats initial_stats;
 429         int itemizing = am_server ? logfile_format_has_i : stdout_format_has_i;
 430         enum logcode log_code = log_before_transfer ? FLOG : FINFO;
 431         int max_phase = protocol_version >= 29 ? 2 : 1;
 432         int dflt_perms = (ACCESSPERMS & ~orig_umask);
 433 #ifdef SUPPORT_ACLS
 434         const char *parent_dirname = "";
 435 #endif
 436         int ndx, recv_ok;
 437
 438         if (DEBUG_GTE(RECV, 1))
 439                 rprintf(FINFO, "recv_files(%d) starting\n", cur_flist->used);
 440
 441         if (delay_updates)
 442                 delayed_bits = bitbag_create(cur_flist->used + 1);
 443
 444         while (1) {
 445                 cleanup_disable();
 446
 447                 /* This call also sets cur_flist. */
 448                 ndx = read_ndx_and_attrs(f_in, &iflags, &fnamecmp_type,
 449                                          xname, &xlen);
 450                 if (ndx == NDX_DONE) {
 451                         if (!am_server && INFO_GTE(PROGRESS, 2) && cur_flist) {
 452                                 set_current_file_index(NULL, 0);
 453                                 end_progress(0);
 454                         }
 455                         if (inc_recurse && first_flist) {
 456                                 if (read_batch)
 457                                         gen_wants_ndx(first_flist->used + first_flist->ndx_start);
 458                                 flist_free(first_flist);
 459                                 if (first_flist)
 460                                         continue;
 461                         } else if (read_batch && first_flist)
 462                                 gen_wants_ndx(first_flist->used);
 463                         if (++phase > max_phase)
 464                                 break;
 465                         if (DEBUG_GTE(RECV, 1))
 466                                 rprintf(FINFO, "recv_files phase=%d\n", phase);
 467                         if (phase == 2 && delay_updates)
 468                                 handle_delayed_updates(local_name);
 469                         send_msg(MSG_DONE, "", 0, 0);
 470                         continue;
 471                 }
 472
 473                 if (ndx - cur_flist->ndx_start >= 0)
 474                         file = cur_flist->files[ndx - cur_flist->ndx_start];
 475                 else
 476                         file = dir_flist->files[cur_flist->parent_ndx];
 477                 fname = local_name ? local_name : f_name(file, fbuf);
 478
 479                 if (DEBUG_GTE(RECV, 1))
 480                         rprintf(FINFO, "recv_files(%s)\n", fname);
 481
 482 #ifdef SUPPORT_XATTRS
 483                 if (iflags & ITEM_REPORT_XATTR && !dry_run)
 484                         recv_xattr_request(file, f_in);
 485 #endif
 486
 487                 if (!(iflags & ITEM_TRANSFER)) {
 488                         maybe_log_item(file, iflags, itemizing, xname);
 489 #ifdef SUPPORT_XATTRS
 490                         if (preserve_xattrs && iflags & ITEM_REPORT_XATTR && !dry_run)
 491                                 set_file_attrs(fname, file, NULL, fname, 0);
 492 #endif
 493                         if (iflags & ITEM_IS_NEW) {
 494                                 stats.created_files++;
 495                                 if (S_ISREG(file->mode)) {
 496                                         /* Nothing further to count. */
 497                                 } else if (S_ISDIR(file->mode))
 498                                         stats.created_dirs++;
 499 #ifdef SUPPORT_LINKS
 500                                 else if (S_ISLNK(file->mode))
 501                                         stats.created_symlinks++;
 502 #endif
 503                                 else if (IS_DEVICE(file->mode))
 504                                         stats.created_devices++;
 505                                 else
 506                                         stats.created_specials++;
 507                         }
 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                         if (iflags & ITEM_IS_NEW)
 538                                 stats.created_files++;
 539                 }
 540
 541                 if (!am_server && INFO_GTE(PROGRESS, 1))
 542                         set_current_file_index(file, ndx);
 543                 stats.xferred_files++;
 544                 stats.total_transferred_size += F_LENGTH(file);
 545
 546                 cleanup_got_literal = 0;
 547
 548                 if (daemon_filter_list.head
 549                     && check_filter(&daemon_filter_list, FLOG, fname, 0) < 0) {
 550                         rprintf(FERROR, "attempt to hack rsync failed.\n");
 551                         exit_cleanup(RERR_PROTOCOL);
 552                 }
 553
 554                 if (!do_xfers) { /* log the transfer */
 555                         log_item(FCLIENT, file, &stats, iflags, NULL);
 556                         if (read_batch)
 557                                 discard_receive_data(f_in, F_LENGTH(file));
 558                         continue;
 559                 }
 560                 if (write_batch < 0) {
 561                         log_item(FCLIENT, file, &stats, iflags, NULL);
 562                         if (!am_server)
 563                                 discard_receive_data(f_in, F_LENGTH(file));
 564                         continue;
 565                 }
 566
 567                 if (read_batch) {
 568                         if (!(redoing ? we_want_redo(ndx) : gen_wants_ndx(ndx))) {
 569                                 rprintf(FINFO,
 570                                         "(Skipping batched update for%s \"%s\")\n",
 571                                         redoing ? " resend of" : "",
 572                                         fname);
 573                                 discard_receive_data(f_in, F_LENGTH(file));
 574                                 file->flags |= FLAG_FILE_SENT;
 575                                 continue;
 576                         }
 577                 }
 578
 579                 partialptr = partial_dir ? partial_dir_fname(fname) : fname;
 580
 581                 if (protocol_version >= 29) {
 582                         switch (fnamecmp_type) {
 583                         case FNAMECMP_FNAME:
 584                                 fnamecmp = fname;
 585                                 break;
 586                         case FNAMECMP_PARTIAL_DIR:
 587                                 fnamecmp = partialptr;
 588                                 break;
 589                         case FNAMECMP_BACKUP:
 590                                 fnamecmp = get_backup_name(fname);
 591                                 break;
 592                         case FNAMECMP_FUZZY:
 593                                 if (file->dirname) {
 594                                         pathjoin(fnamecmpbuf, MAXPATHLEN,
 595                                                  file->dirname, xname);
 596                                         fnamecmp = fnamecmpbuf;
 597                                 } else
 598                                         fnamecmp = xname;
 599                                 break;
 600                         default:
 601                                 if (fnamecmp_type >= basis_dir_cnt) {
 602                                         rprintf(FERROR,
 603                                                 "invalid basis_dir index: %d.\n",
 604                                                 fnamecmp_type);
 605                                         exit_cleanup(RERR_PROTOCOL);
 606                                 }
 607                                 pathjoin(fnamecmpbuf, sizeof fnamecmpbuf,
 608                                          basis_dir[fnamecmp_type], fname);
 609                                 fnamecmp = fnamecmpbuf;
 610                                 break;
 611                         }
 612                         if (!fnamecmp || (daemon_filter_list.head
 613                           && check_filter(&daemon_filter_list, FLOG, fname, 0) < 0)) {
 614                                 fnamecmp = fname;
 615                                 fnamecmp_type = FNAMECMP_FNAME;
 616                         }
 617                 } else {
 618                         /* Reminder: --inplace && --partial-dir are never
 619                          * enabled at the same time. */
 620                         if (inplace && make_backups > 0) {
 621                                 if (!(fnamecmp = get_backup_name(fname)))
 622                                         fnamecmp = fname;
 623                                 else
 624                                         fnamecmp_type = FNAMECMP_BACKUP;
 625                         } else if (partial_dir && partialptr)
 626                                 fnamecmp = partialptr;
 627                         else
 628                                 fnamecmp = fname;
 629                 }
 630
 631                 initial_stats = stats;
 632
 633                 /* open the file */
 634                 fd1 = do_open(fnamecmp, O_RDONLY, 0);
 635
 636                 if (fd1 == -1 && protocol_version < 29) {
 637                         if (fnamecmp != fname) {
 638                                 fnamecmp = fname;
 639                                 fd1 = do_open(fnamecmp, O_RDONLY, 0);
 640                         }
 641
 642                         if (fd1 == -1 && basis_dir[0]) {
 643                                 /* pre-29 allowed only one alternate basis */
 644                                 pathjoin(fnamecmpbuf, sizeof fnamecmpbuf,
 645                                          basis_dir[0], fname);
 646                                 fnamecmp = fnamecmpbuf;
 647                                 fd1 = do_open(fnamecmp, O_RDONLY, 0);
 648                         }
 649                 }
 650
 651                 updating_basis_or_equiv = inplace
 652                     && (fnamecmp == fname || fnamecmp_type == FNAMECMP_BACKUP);
 653
 654                 if (fd1 == -1) {
 655                         st.st_mode = 0;
 656                         st.st_size = 0;
 657                 } else if (do_fstat(fd1,&st) != 0) {
 658                         rsyserr(FERROR_XFER, errno, "fstat %s failed",
 659                                 full_fname(fnamecmp));
 660                         discard_receive_data(f_in, F_LENGTH(file));
 661                         close(fd1);
 662                         if (inc_recurse)
 663                                 send_msg_int(MSG_NO_SEND, ndx);
 664                         continue;
 665                 }
 666
 667                 if (fd1 != -1 && S_ISDIR(st.st_mode) && fnamecmp == fname) {
 668                         /* this special handling for directories
 669                          * wouldn't be necessary if robust_rename()
 670                          * and the underlying robust_unlink could cope
 671                          * with directories
 672                          */
 673                         rprintf(FERROR_XFER, "recv_files: %s is a directory\n",
 674                                 full_fname(fnamecmp));
 675                         discard_receive_data(f_in, F_LENGTH(file));
 676                         close(fd1);
 677                         if (inc_recurse)
 678                                 send_msg_int(MSG_NO_SEND, ndx);
 679                         continue;
 680                 }
 681
 682                 if (fd1 != -1 && !S_ISREG(st.st_mode)) {
 683                         close(fd1);
 684                         fd1 = -1;
 685                 }
 686
 687                 /* If we're not preserving permissions, change the file-list's
 688                  * mode based on the local permissions and some heuristics. */
 689                 if (!preserve_perms) {
 690                         int exists = fd1 != -1;
 691 #ifdef SUPPORT_ACLS
 692                         const char *dn = file->dirname ? file->dirname : ".";
 693                         if (parent_dirname != dn
 694                          && strcmp(parent_dirname, dn) != 0) {
 695                                 dflt_perms = default_perms_for_dir(dn);
 696                                 parent_dirname = dn;
 697                         }
 698 #endif
 699                         file->mode = dest_mode(file->mode, st.st_mode,
 700                                                dflt_perms, exists);
 701                 }
 702
 703                 /* We now check to see if we are writing the file "inplace" */
 704                 if (inplace)  {
 705                         fd2 = do_open(fname, O_WRONLY|O_CREAT, 0600);
 706                         if (fd2 == -1) {
 707                                 rsyserr(FERROR_XFER, errno, "open %s failed",
 708                                         full_fname(fname));
 709                         }
 710                 } else {
 711                         fd2 = open_tmpfile(fnametmp, fname, file);
 712                         if (fd2 != -1)
 713                                 cleanup_set(fnametmp, partialptr, file, fd1, fd2);
 714                 }
 715
 716                 if (fd2 == -1) {
 717                         discard_receive_data(f_in, F_LENGTH(file));
 718                         if (fd1 != -1)
 719                                 close(fd1);
 720                         if (inc_recurse)
 721                                 send_msg_int(MSG_NO_SEND, ndx);
 722                         continue;
 723                 }
 724
 725                 /* log the transfer */
 726                 if (log_before_transfer)
 727                         log_item(FCLIENT, file, &initial_stats, iflags, NULL);
 728                 else if (!am_server && INFO_GTE(NAME, 1) && INFO_EQ(PROGRESS, 1))
 729                         rprintf(FINFO, "%s\n", fname);
 730
 731                 /* recv file data */
 732                 recv_ok = receive_data(f_in, fnamecmp, fd1, st.st_size,
 733                                        fname, fd2, F_LENGTH(file));
 734
 735                 log_item(log_code, file, &initial_stats, iflags, NULL);
 736
 737                 if (fd1 != -1)
 738                         close(fd1);
 739                 if (close(fd2) < 0) {
 740                         rsyserr(FERROR, errno, "close failed on %s",
 741                                 full_fname(fnametmp));
 742                         exit_cleanup(RERR_FILEIO);
 743                 }
 744
 745                 if ((recv_ok && (!delay_updates || !partialptr)) || inplace) {
 746                         if (partialptr == fname)
 747                                 partialptr = NULL;
 748                         if (!finish_transfer(fname, fnametmp, fnamecmp,
 749                                              partialptr, file, recv_ok, 1))
 750                                 recv_ok = -1;
 751                         else if (fnamecmp == partialptr) {
 752                                 do_unlink(partialptr);
 753                                 handle_partial_dir(partialptr, PDIR_DELETE);
 754                         }
 755                 } else if (keep_partial && partialptr) {
 756                         if (!handle_partial_dir(partialptr, PDIR_CREATE)) {
 757                                 rprintf(FERROR,
 758                                     "Unable to create partial-dir for %s -- discarding %s.\n",
 759                                     local_name ? local_name : f_name(file, NULL),
 760                                     recv_ok ? "completed file" : "partial file");
 761                                 do_unlink(fnametmp);
 762                                 recv_ok = -1;
 763                         } else if (!finish_transfer(partialptr, fnametmp, fnamecmp, NULL,
 764                                                     file, recv_ok, !partial_dir))
 765                                 recv_ok = -1;
 766                         else if (delay_updates && recv_ok) {
 767                                 bitbag_set_bit(delayed_bits, ndx);
 768                                 recv_ok = 2;
 769                         } else
 770                                 partialptr = NULL;
 771                 } else
 772                         do_unlink(fnametmp);
 773
 774                 cleanup_disable();
 775
 776                 if (read_batch)
 777                         file->flags |= FLAG_FILE_SENT;
 778
 779                 switch (recv_ok) {
 780                 case 2:
 781                         break;
 782                 case 1:
 783                         if (remove_source_files || inc_recurse
 784                          || (preserve_hard_links && F_IS_HLINKED(file)))
 785                                 send_msg_int(MSG_SUCCESS, ndx);
 786                         break;
 787                 case 0: {
 788                         enum logcode msgtype = redoing ? FERROR_XFER : FWARNING;
 789                         if (msgtype == FERROR_XFER || INFO_GTE(NAME, 1)) {
 790                                 char *errstr, *redostr, *keptstr;
 791                                 if (!(keep_partial && partialptr) && !inplace)
 792                                         keptstr = "discarded";
 793                                 else if (partial_dir)
 794                                         keptstr = "put into partial-dir";
 795                                 else
 796                                         keptstr = "retained";
 797                                 if (msgtype == FERROR_XFER) {
 798                                         errstr = "ERROR";
 799                                         redostr = "";
 800                                 } else {
 801                                         errstr = "WARNING";
 802                                         redostr = read_batch ? " (may try again)"
 803                                                              : " (will try again)";
 804                                 }
 805                                 rprintf(msgtype,
 806                                         "%s: %s failed verification -- update %s%s.\n",
 807                                         errstr, local_name ? f_name(file, NULL) : fname,
 808                                         keptstr, redostr);
 809                         }
 810                         if (!redoing) {
 811                                 if (read_batch)
 812                                         flist_ndx_push(&batch_redo_list, ndx);
 813                                 send_msg_int(MSG_REDO, ndx);
 814                                 file->flags |= FLAG_FILE_SENT;
 815                         } else if (inc_recurse)
 816                                 send_msg_int(MSG_NO_SEND, ndx);
 817                         break;
 818                     }
 819                 case -1:
 820                         if (inc_recurse)
 821                                 send_msg_int(MSG_NO_SEND, ndx);
 822                         break;
 823                 }
 824         }
 825         if (make_backups < 0)
 826                 make_backups = -make_backups;
 827
 828         if (phase == 2 && delay_updates) /* for protocol_version < 29 */
 829                 handle_delayed_updates(local_name);
 830
 831         if (read_batch) {
 832                 read_int(batch_gen_fd); /* Discard -1 */
 833                 read_del_stats(batch_gen_fd);
 834         }
 835
 836         if (DEBUG_GTE(RECV, 1))
 837                 rprintf(FINFO,"recv_files finished\n");
 838
 839         return 0;
 840 }