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 #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 allowed_lull;
  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 char sender_file_sum[MAX_DIGEST_LEN];
  59 extern struct file_list *cur_flist, *first_flist, *dir_flist;
  60 extern filter_rule_list daemon_filter_list;
  61
  62 static struct bitbag *delayed_bits = NULL;
  63 static int phase = 0, redoing = 0;
  64 static flist_ndx_list batch_redo_list;
  65 /* We're either updating the basis file or an identical copy: */
  66 static int updating_basis_or_equiv;
  67
  68 #define TMPNAME_SUFFIX ".XXXXXX"
  69 #define TMPNAME_SUFFIX_LEN ((int)sizeof TMPNAME_SUFFIX - 1)
  70 #define MAX_UNIQUE_NUMBER 999999
  71 #define MAX_UNIQUE_LOOP 100
  72
  73 /* get_tmpname() - create a tmp filename for a given filename
  74  *
  75  * If a tmpdir is defined, use that as the directory to put it in.  Otherwise,
  76  * the tmp filename is in the same directory as the given name.  Note that
  77  * there may be no directory at all in the given name!
  78  *
  79  * The tmp filename is basically the given filename with a dot prepended, and
  80  * .XXXXXX appended (for mkstemp() to put its unique gunk in).  We take care
  81  * to not exceed either the MAXPATHLEN or NAME_MAX, especially the last, as
  82  * the basename basically becomes 8 characters longer.  In such a case, the
  83  * original name is shortened sufficiently to make it all fit.
  84  *
  85  * If the make_unique arg is True, the XXXXXX string is replaced with a unique
  86  * string that doesn't exist at the time of the check.  This is intended to be
  87  * used for creating hard links, symlinks, devices, and special files, since
  88  * normal files should be handled by mkstemp() for safety.
  89  *
  90  * Of course, the only reason the file is based on the original name is to
  91  * make it easier to figure out what purpose a temp file is serving when a
  92  * transfer is in progress. */
  93 int get_tmpname(char *fnametmp, const char *fname, BOOL make_unique)
  94 {
  95         int maxname, added, length = 0;
  96         const char *f;
  97         char *suf;
  98
  99         if (tmpdir) {
 100                 /* Note: this can't overflow, so the return value is safe */
 101                 length = strlcpy(fnametmp, tmpdir, MAXPATHLEN - 2);
 102                 fnametmp[length++] = '/';
 103         }
 104
 105         if ((f = strrchr(fname, '/')) != NULL) {
 106                 ++f;
 107                 if (!tmpdir) {
 108                         length = f - fname;
 109                         /* copy up to and including the slash */
 110                         strlcpy(fnametmp, fname, length + 1);
 111                 }
 112         } else
 113                 f = fname;
 114         fnametmp[length++] = '.';
 115
 116         /* The maxname value is bufsize, and includes space for the '\0'.
 117          * NAME_MAX needs an extra -1 for the name's leading dot. */
 118         maxname = MIN(MAXPATHLEN - length - TMPNAME_SUFFIX_LEN,
 119                       NAME_MAX - 1 - TMPNAME_SUFFIX_LEN);
 120
 121         if (maxname < 1) {
 122                 rprintf(FERROR_XFER, "temporary filename too long: %s\n", fname);
 123                 fnametmp[0] = '\0';
 124                 return 0;
 125         }
 126
 127         added = strlcpy(fnametmp + length, f, maxname);
 128         if (added >= maxname)
 129                 added = maxname - 1;
 130         suf = fnametmp + length + added;
 131
 132         if (make_unique) {
 133                 static unsigned counter_limit;
 134                 unsigned counter;
 135
 136                 if (!counter_limit) {
 137                         counter_limit = (unsigned)getpid() + MAX_UNIQUE_LOOP;
 138                         if (counter_limit > MAX_UNIQUE_NUMBER || counter_limit < MAX_UNIQUE_LOOP)
 139                                 counter_limit = MAX_UNIQUE_LOOP;
 140                 }
 141                 counter = counter_limit - MAX_UNIQUE_LOOP;
 142
 143                 /* This doesn't have to be very good because we don't need
 144                  * to worry about someone trying to guess the values:  all
 145                  * a conflict will do is cause a device, special file, hard
 146                  * link, or symlink to fail to be created.  Also: avoid
 147                  * using mktemp() due to gcc's annoying warning. */
 148                 while (1) {
 149                         snprintf(suf, TMPNAME_SUFFIX_LEN+1, ".%d", counter);
 150                         if (access(fnametmp, 0) < 0)
 151                                 break;
 152                         if (++counter >= counter_limit)
 153                                 return 0;
 154                 }
 155         } else
 156                 memcpy(suf, TMPNAME_SUFFIX, TMPNAME_SUFFIX_LEN+1);
 157
 158         return 1;
 159 }
 160
 161 /* Opens a temporary file for writing.
 162  * Success: Writes name into fnametmp, returns fd.
 163  * Failure: Clobbers fnametmp, returns -1.
 164  * Calling cleanup_set() is the caller's job. */
 165 int open_tmpfile(char *fnametmp, const char *fname, struct file_struct *file)
 166 {
 167         int fd;
 168
 169         if (!get_tmpname(fnametmp, fname, False))
 170                 return -1;
 171
 172         /* We initially set the perms without the setuid/setgid bits or group
 173          * access to ensure that there is no race condition.  They will be
 174          * correctly updated after the right owner and group info is set.
 175          * (Thanks to snabb@epipe.fi for pointing this out.) */
 176         fd = do_mkstemp(fnametmp, (file->mode & INITACCESSPERMS) | S_IWUSR);
 177
 178 #if 0
 179         /* In most cases parent directories will already exist because their
 180          * information should have been previously transferred, but that may
 181          * not be the case with -R */
 182         if (fd == -1 && relative_paths && errno == ENOENT
 183          && make_path(fnametmp, MKP_SKIP_SLASH | MKP_DROP_NAME) == 0) {
 184                 /* Get back to name with XXXXXX in it. */
 185                 get_tmpname(fnametmp, fname, False);
 186                 fd = do_mkstemp(fnametmp, file->mode & INITACCESSPERMS);
 187         }
 188 #endif
 189
 190         if (fd == -1) {
 191                 rsyserr(FERROR_XFER, errno, "mkstemp %s failed",
 192                         full_fname(fnametmp));
 193                 return -1;
 194         }
 195
 196         return fd;
 197 }
 198
 199 static int receive_data(int f_in, char *fname_r, int fd_r, OFF_T size_r,
 200                         const char *fname, int fd, OFF_T total_size)
 201 {
 202         static char file_sum1[MAX_DIGEST_LEN];
 203         struct map_struct *mapbuf;
 204         struct sum_struct sum;
 205         int32 len;
 206         OFF_T offset = 0;
 207         OFF_T offset2;
 208         char *data;
 209         int32 i;
 210         char *map = NULL;
 211
 212         read_sum_head(f_in, &sum);
 213
 214         if (fd_r >= 0 && size_r > 0) {
 215                 int32 read_size = MAX(sum.blength * 2, 16*1024);
 216                 mapbuf = map_file(fd_r, size_r, read_size, sum.blength);
 217                 if (DEBUG_GTE(DELTASUM, 2)) {
 218                         rprintf(FINFO, "recv mapped %s of size %s\n",
 219                                 fname_r, big_num(size_r));
 220                 }
 221         } else
 222                 mapbuf = NULL;
 223
 224         sum_init(checksum_seed);
 225
 226         if (append_mode > 0) {
 227                 OFF_T j;
 228                 sum.flength = (OFF_T)sum.count * sum.blength;
 229                 if (sum.remainder)
 230                         sum.flength -= sum.blength - sum.remainder;
 231                 if (append_mode == 2 && mapbuf) {
 232                         for (j = CHUNK_SIZE; j < sum.flength; j += CHUNK_SIZE) {
 233                                 if (INFO_GTE(PROGRESS, 1))
 234                                         show_progress(offset, total_size);
 235                                 sum_update(map_ptr(mapbuf, offset, CHUNK_SIZE),
 236                                            CHUNK_SIZE);
 237                                 offset = j;
 238                         }
 239                         if (offset < sum.flength) {
 240                                 int32 len = (int32)(sum.flength - offset);
 241                                 if (INFO_GTE(PROGRESS, 1))
 242                                         show_progress(offset, total_size);
 243                                 sum_update(map_ptr(mapbuf, offset, len), len);
 244                         }
 245                 }
 246                 offset = sum.flength;
 247                 if (fd != -1 && (j = do_lseek(fd, offset, SEEK_SET)) != offset) {
 248                         rsyserr(FERROR_XFER, errno, "lseek of %s returned %s, not %s",
 249                                 full_fname(fname), big_num(j), big_num(offset));
 250                         exit_cleanup(RERR_FILEIO);
 251                 }
 252         }
 253
 254         while ((i = recv_token(f_in, &data)) != 0) {
 255                 if (INFO_GTE(PROGRESS, 1))
 256                         show_progress(offset, total_size);
 257
 258                 if (allowed_lull)
 259                         maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH | MSK_ACTIVE_RECEIVER);
 260
 261                 if (i > 0) {
 262                         if (DEBUG_GTE(DELTASUM, 3)) {
 263                                 rprintf(FINFO,"data recv %d at %s\n",
 264                                         i, big_num(offset));
 265                         }
 266
 267                         stats.literal_data += i;
 268                         cleanup_got_literal = 1;
 269
 270                         sum_update(data, i);
 271
 272                         if (fd != -1 && write_file(fd,data,i) != i)
 273                                 goto report_write_error;
 274                         offset += i;
 275                         continue;
 276                 }
 277
 278                 i = -(i+1);
 279                 offset2 = i * (OFF_T)sum.blength;
 280                 len = sum.blength;
 281                 if (i == (int)sum.count-1 && sum.remainder != 0)
 282                         len = sum.remainder;
 283
 284                 stats.matched_data += len;
 285
 286                 if (DEBUG_GTE(DELTASUM, 3)) {
 287                         rprintf(FINFO,
 288                                 "chunk[%d] of size %ld at %s offset=%s\n",
 289                                 i, (long)len, big_num(offset2), big_num(offset));
 290                 }
 291
 292                 if (mapbuf) {
 293                         map = map_ptr(mapbuf,offset2,len);
 294
 295                         see_token(map, len);
 296                         sum_update(map, len);
 297                 }
 298
 299                 if (updating_basis_or_equiv) {
 300                         if (offset == offset2 && fd != -1) {
 301                                 OFF_T pos;
 302                                 if (flush_write_file(fd) < 0)
 303                                         goto report_write_error;
 304                                 offset += len;
 305                                 if ((pos = do_lseek(fd, len, SEEK_CUR)) != offset) {
 306                                         rsyserr(FERROR_XFER, errno,
 307                                                 "lseek of %s returned %s, not %s",
 308                                                 full_fname(fname),
 309                                                 big_num(pos), big_num(offset));
 310                                         exit_cleanup(RERR_FILEIO);
 311                                 }
 312                                 continue;
 313                         }
 314                 }
 315                 if (fd != -1 && map && write_file(fd, map, len) != (int)len)
 316                         goto report_write_error;
 317                 offset += len;
 318         }
 319
 320         if (flush_write_file(fd) < 0)
 321                 goto report_write_error;
 322
 323 #ifdef HAVE_FTRUNCATE
 324         if (inplace && fd != -1
 325          && ftruncate(fd, offset) < 0) {
 326                 rsyserr(FERROR_XFER, errno, "ftruncate failed on %s",
 327                         full_fname(fname));
 328         }
 329 #endif
 330
 331         if (INFO_GTE(PROGRESS, 1))
 332                 end_progress(total_size);
 333
 334         if (fd != -1 && offset > 0 && sparse_end(fd) != 0) {
 335             report_write_error:
 336                 rsyserr(FERROR_XFER, errno, "write failed on %s",
 337                         full_fname(fname));
 338                 exit_cleanup(RERR_FILEIO);
 339         }
 340
 341         if (sum_end(file_sum1) != checksum_len)
 342                 overflow_exit("checksum_len"); /* Impossible... */
 343
 344         if (mapbuf)
 345                 unmap_file(mapbuf);
 346
 347         read_buf(f_in, sender_file_sum, checksum_len);
 348         if (DEBUG_GTE(DELTASUM, 2))
 349                 rprintf(FINFO,"got file_sum\n");
 350         if (fd != -1 && memcmp(file_sum1, sender_file_sum, checksum_len) != 0)
 351                 return 0;
 352         return 1;
 353 }
 354
 355
 356 static void discard_receive_data(int f_in, OFF_T length)
 357 {
 358         receive_data(f_in, NULL, -1, 0, NULL, -1, length);
 359 }
 360
 361 static void handle_delayed_updates(char *local_name)
 362 {
 363         char *fname, *partialptr;
 364         int ndx;
 365
 366         for (ndx = -1; (ndx = bitbag_next_bit(delayed_bits, ndx)) >= 0; ) {
 367                 struct file_struct *file = cur_flist->files[ndx];
 368                 fname = local_name ? local_name : f_name(file, NULL);
 369                 if ((partialptr = partial_dir_fname(fname)) != NULL) {
 370                         if (make_backups > 0 && !make_backup(fname, False))
 371                                 continue;
 372                         if (DEBUG_GTE(RECV, 1)) {
 373                                 rprintf(FINFO, "renaming %s to %s\n",
 374                                         partialptr, fname);
 375                         }
 376                         /* We don't use robust_rename() here because the
 377                          * partial-dir must be on the same drive. */
 378                         if (do_rename(partialptr, fname) < 0) {
 379                                 rsyserr(FERROR_XFER, errno,
 380                                         "rename failed for %s (from %s)",
 381                                         full_fname(fname), partialptr);
 382                         } else {
 383                                 if (remove_source_files
 384                                  || (preserve_hard_links && F_IS_HLINKED(file)))
 385                                         send_msg_int(MSG_SUCCESS, ndx);
 386                                 handle_partial_dir(partialptr, PDIR_DELETE);
 387                         }
 388                 }
 389         }
 390 }
 391
 392 static void no_batched_update(int ndx, BOOL is_redo)
 393 {
 394         struct file_list *flist = flist_for_ndx(ndx, "no_batched_update");
 395         struct file_struct *file = flist->files[ndx - flist->ndx_start];
 396
 397         rprintf(FERROR_XFER, "(No batched update for%s \"%s\")\n",
 398                 is_redo ? " resend of" : "", f_name(file, NULL));
 399
 400         if (inc_recurse && !dry_run)
 401                 send_msg_int(MSG_NO_SEND, ndx);
 402 }
 403
 404 static int we_want_redo(int desired_ndx)
 405 {
 406         static int redo_ndx = -1;
 407
 408         while (redo_ndx < desired_ndx) {
 409                 if (redo_ndx >= 0)
 410                         no_batched_update(redo_ndx, True);
 411                 if ((redo_ndx = flist_ndx_pop(&batch_redo_list)) < 0)
 412                         return 0;
 413         }
 414
 415         if (redo_ndx == desired_ndx) {
 416                 redo_ndx = -1;
 417                 return 1;
 418         }
 419
 420         return 0;
 421 }
 422
 423 static int gen_wants_ndx(int desired_ndx, int flist_num)
 424 {
 425         static int next_ndx = -1;
 426         static int done_cnt = 0;
 427         static BOOL got_eof = False;
 428
 429         if (got_eof)
 430                 return 0;
 431
 432         /* TODO: integrate gen-reading I/O into perform_io() so this is not needed? */
 433         io_flush(FULL_FLUSH);
 434
 435         while (next_ndx < desired_ndx) {
 436                 if (inc_recurse && flist_num <= done_cnt)
 437                         return 0;
 438                 if (next_ndx >= 0)
 439                         no_batched_update(next_ndx, False);
 440                 if ((next_ndx = read_int(batch_gen_fd)) < 0) {
 441                         if (inc_recurse) {
 442                                 done_cnt++;
 443                                 continue;
 444                         }
 445                         got_eof = True;
 446                         return 0;
 447                 }
 448         }
 449
 450         if (next_ndx == desired_ndx) {
 451                 next_ndx = -1;
 452                 return 1;
 453         }
 454
 455         return 0;
 456 }
 457
 458 /**
 459  * main routine for receiver process.
 460  *
 461  * Receiver process runs on the same host as the generator process. */
 462 int recv_files(int f_in, int f_out, char *local_name)
 463 {
 464         int fd1,fd2;
 465         STRUCT_STAT st;
 466         int iflags, xlen;
 467         char *fname, fbuf[MAXPATHLEN];
 468         char xname[MAXPATHLEN];
 469         char fnametmp[MAXPATHLEN];
 470         char *fnamecmp, *partialptr;
 471         char fnamecmpbuf[MAXPATHLEN];
 472         uchar fnamecmp_type;
 473         struct file_struct *file;
 474         int itemizing = am_server ? logfile_format_has_i : stdout_format_has_i;
 475         enum logcode log_code = log_before_transfer ? FLOG : FINFO;
 476         int max_phase = protocol_version >= 29 ? 2 : 1;
 477         int dflt_perms = (ACCESSPERMS & ~orig_umask);
 478 #ifdef SUPPORT_ACLS
 479         const char *parent_dirname = "";
 480 #endif
 481         int ndx, recv_ok;
 482
 483         if (DEBUG_GTE(RECV, 1))
 484                 rprintf(FINFO, "recv_files(%d) starting\n", cur_flist->used);
 485
 486         if (delay_updates)
 487                 delayed_bits = bitbag_create(cur_flist->used + 1);
 488
 489         while (1) {
 490                 cleanup_disable();
 491
 492                 /* This call also sets cur_flist. */
 493                 ndx = read_ndx_and_attrs(f_in, f_out, &iflags, &fnamecmp_type,
 494                                          xname, &xlen);
 495                 if (ndx == NDX_DONE) {
 496                         if (!am_server && INFO_GTE(PROGRESS, 2) && cur_flist) {
 497                                 set_current_file_index(NULL, 0);
 498                                 end_progress(0);
 499                         }
 500                         if (inc_recurse && first_flist) {
 501                                 if (read_batch) {
 502                                         ndx = first_flist->used + first_flist->ndx_start;
 503                                         gen_wants_ndx(ndx, first_flist->flist_num);
 504                                 }
 505                                 flist_free(first_flist);
 506                                 if (first_flist)
 507                                         continue;
 508                         } else if (read_batch && first_flist) {
 509                                 ndx = first_flist->used;
 510                                 gen_wants_ndx(ndx, first_flist->flist_num);
 511                         }
 512                         if (++phase > max_phase)
 513                                 break;
 514                         if (DEBUG_GTE(RECV, 1))
 515                                 rprintf(FINFO, "recv_files phase=%d\n", phase);
 516                         if (phase == 2 && delay_updates)
 517                                 handle_delayed_updates(local_name);
 518                         write_int(f_out, NDX_DONE);
 519                         continue;
 520                 }
 521
 522                 if (ndx - cur_flist->ndx_start >= 0)
 523                         file = cur_flist->files[ndx - cur_flist->ndx_start];
 524                 else
 525                         file = dir_flist->files[cur_flist->parent_ndx];
 526                 fname = local_name ? local_name : f_name(file, fbuf);
 527
 528                 if (DEBUG_GTE(RECV, 1))
 529                         rprintf(FINFO, "recv_files(%s)\n", fname);
 530
 531 #ifdef SUPPORT_XATTRS
 532                 if (iflags & ITEM_REPORT_XATTR && do_xfers)
 533                         recv_xattr_request(file, f_in);
 534 #endif
 535
 536                 if (!(iflags & ITEM_TRANSFER)) {
 537                         maybe_log_item(file, iflags, itemizing, xname);
 538 #ifdef SUPPORT_XATTRS
 539                         if (preserve_xattrs && iflags & ITEM_REPORT_XATTR && do_xfers)
 540                                 set_file_attrs(fname, file, NULL, fname, 0);
 541 #endif
 542                         if (iflags & ITEM_IS_NEW) {
 543                                 stats.created_files++;
 544                                 if (S_ISREG(file->mode)) {
 545                                         /* Nothing further to count. */
 546                                 } else if (S_ISDIR(file->mode))
 547                                         stats.created_dirs++;
 548 #ifdef SUPPORT_LINKS
 549                                 else if (S_ISLNK(file->mode))
 550                                         stats.created_symlinks++;
 551 #endif
 552                                 else if (IS_DEVICE(file->mode))
 553                                         stats.created_devices++;
 554                                 else
 555                                         stats.created_specials++;
 556                         }
 557                         continue;
 558                 }
 559                 if (phase == 2) {
 560                         rprintf(FERROR,
 561                                 "got transfer request in phase 2 [%s]\n",
 562                                 who_am_i());
 563                         exit_cleanup(RERR_PROTOCOL);
 564                 }
 565
 566                 if (file->flags & FLAG_FILE_SENT) {
 567                         if (csum_length == SHORT_SUM_LENGTH) {
 568                                 if (keep_partial && !partial_dir)
 569                                         make_backups = -make_backups; /* prevents double backup */
 570                                 if (append_mode)
 571                                         sparse_files = -sparse_files;
 572                                 append_mode = -append_mode;
 573                                 csum_length = SUM_LENGTH;
 574                                 redoing = 1;
 575                         }
 576                 } else {
 577                         if (csum_length != SHORT_SUM_LENGTH) {
 578                                 if (keep_partial && !partial_dir)
 579                                         make_backups = -make_backups;
 580                                 if (append_mode)
 581                                         sparse_files = -sparse_files;
 582                                 append_mode = -append_mode;
 583                                 csum_length = SHORT_SUM_LENGTH;
 584                                 redoing = 0;
 585                         }
 586                         if (iflags & ITEM_IS_NEW)
 587                                 stats.created_files++;
 588                 }
 589
 590                 if (!am_server && INFO_GTE(PROGRESS, 1))
 591                         set_current_file_index(file, ndx);
 592                 stats.xferred_files++;
 593                 stats.total_transferred_size += F_LENGTH(file);
 594
 595                 cleanup_got_literal = 0;
 596
 597                 if (daemon_filter_list.head
 598                     && check_filter(&daemon_filter_list, FLOG, fname, 0) < 0) {
 599                         rprintf(FERROR, "attempt to hack rsync failed.\n");
 600                         exit_cleanup(RERR_PROTOCOL);
 601                 }
 602
 603                 if (read_batch) {
 604                         int wanted = redoing
 605                                    ? we_want_redo(ndx)
 606                                    : gen_wants_ndx(ndx, cur_flist->flist_num);
 607                         if (!wanted) {
 608                                 rprintf(FINFO,
 609                                         "(Skipping batched update for%s \"%s\")\n",
 610                                         redoing ? " resend of" : "",
 611                                         fname);
 612                                 discard_receive_data(f_in, F_LENGTH(file));
 613                                 file->flags |= FLAG_FILE_SENT;
 614                                 continue;
 615                         }
 616                 }
 617
 618                 if (!log_before_transfer)
 619                         remember_initial_stats();
 620
 621                 if (!do_xfers) { /* log the transfer */
 622                         log_item(FCLIENT, file, iflags, NULL);
 623                         if (read_batch)
 624                                 discard_receive_data(f_in, F_LENGTH(file));
 625                         continue;
 626                 }
 627                 if (write_batch < 0) {
 628                         log_item(FCLIENT, file, iflags, NULL);
 629                         if (!am_server)
 630                                 discard_receive_data(f_in, F_LENGTH(file));
 631                         continue;
 632                 }
 633
 634                 partialptr = partial_dir ? partial_dir_fname(fname) : fname;
 635
 636                 if (protocol_version >= 29) {
 637                         switch (fnamecmp_type) {
 638                         case FNAMECMP_FNAME:
 639                                 fnamecmp = fname;
 640                                 break;
 641                         case FNAMECMP_PARTIAL_DIR:
 642                                 fnamecmp = partialptr;
 643                                 break;
 644                         case FNAMECMP_BACKUP:
 645                                 fnamecmp = get_backup_name(fname);
 646                                 break;
 647                         case FNAMECMP_FUZZY:
 648                                 if (file->dirname) {
 649                                         pathjoin(fnamecmpbuf, MAXPATHLEN,
 650                                                  file->dirname, xname);
 651                                         fnamecmp = fnamecmpbuf;
 652                                 } else
 653                                         fnamecmp = xname;
 654                                 break;
 655                         default:
 656                                 if (fnamecmp_type >= basis_dir_cnt) {
 657                                         rprintf(FERROR,
 658                                                 "invalid basis_dir index: %d.\n",
 659                                                 fnamecmp_type);
 660                                         exit_cleanup(RERR_PROTOCOL);
 661                                 }
 662                                 pathjoin(fnamecmpbuf, sizeof fnamecmpbuf,
 663                                          basis_dir[fnamecmp_type], fname);
 664                                 fnamecmp = fnamecmpbuf;
 665                                 break;
 666                         }
 667                         if (!fnamecmp || (daemon_filter_list.head
 668                           && check_filter(&daemon_filter_list, FLOG, fname, 0) < 0)) {
 669                                 fnamecmp = fname;
 670                                 fnamecmp_type = FNAMECMP_FNAME;
 671                         }
 672                 } else {
 673                         /* Reminder: --inplace && --partial-dir are never
 674                          * enabled at the same time. */
 675                         if (inplace && make_backups > 0) {
 676                                 if (!(fnamecmp = get_backup_name(fname)))
 677                                         fnamecmp = fname;
 678                                 else
 679                                         fnamecmp_type = FNAMECMP_BACKUP;
 680                         } else if (partial_dir && partialptr)
 681                                 fnamecmp = partialptr;
 682                         else
 683                                 fnamecmp = fname;
 684                 }
 685
 686                 /* open the file */
 687                 fd1 = do_open(fnamecmp, O_RDONLY, 0);
 688
 689                 if (fd1 == -1 && protocol_version < 29) {
 690                         if (fnamecmp != fname) {
 691                                 fnamecmp = fname;
 692                                 fd1 = do_open(fnamecmp, O_RDONLY, 0);
 693                         }
 694
 695                         if (fd1 == -1 && basis_dir[0]) {
 696                                 /* pre-29 allowed only one alternate basis */
 697                                 pathjoin(fnamecmpbuf, sizeof fnamecmpbuf,
 698                                          basis_dir[0], fname);
 699                                 fnamecmp = fnamecmpbuf;
 700                                 fd1 = do_open(fnamecmp, O_RDONLY, 0);
 701                         }
 702                 }
 703
 704                 updating_basis_or_equiv = inplace
 705                     && (fnamecmp == fname || fnamecmp_type == FNAMECMP_BACKUP);
 706
 707                 if (fd1 == -1) {
 708                         st.st_mode = 0;
 709                         st.st_size = 0;
 710                 } else if (do_fstat(fd1,&st) != 0) {
 711                         rsyserr(FERROR_XFER, errno, "fstat %s failed",
 712                                 full_fname(fnamecmp));
 713                         discard_receive_data(f_in, F_LENGTH(file));
 714                         close(fd1);
 715                         if (inc_recurse)
 716                                 send_msg_int(MSG_NO_SEND, ndx);
 717                         continue;
 718                 }
 719
 720                 if (fd1 != -1 && S_ISDIR(st.st_mode) && fnamecmp == fname) {
 721                         /* this special handling for directories
 722                          * wouldn't be necessary if robust_rename()
 723                          * and the underlying robust_unlink could cope
 724                          * with directories
 725                          */
 726                         rprintf(FERROR_XFER, "recv_files: %s is a directory\n",
 727                                 full_fname(fnamecmp));
 728                         discard_receive_data(f_in, F_LENGTH(file));
 729                         close(fd1);
 730                         if (inc_recurse)
 731                                 send_msg_int(MSG_NO_SEND, ndx);
 732                         continue;
 733                 }
 734
 735                 if (fd1 != -1 && !S_ISREG(st.st_mode)) {
 736                         close(fd1);
 737                         fd1 = -1;
 738                 }
 739
 740                 /* If we're not preserving permissions, change the file-list's
 741                  * mode based on the local permissions and some heuristics. */
 742                 if (!preserve_perms) {
 743                         int exists = fd1 != -1;
 744 #ifdef SUPPORT_ACLS
 745                         const char *dn = file->dirname ? file->dirname : ".";
 746                         if (parent_dirname != dn
 747                          && strcmp(parent_dirname, dn) != 0) {
 748                                 dflt_perms = default_perms_for_dir(dn);
 749                                 parent_dirname = dn;
 750                         }
 751 #endif
 752                         file->mode = dest_mode(file->mode, st.st_mode,
 753                                                dflt_perms, exists);
 754                 }
 755
 756                 /* We now check to see if we are writing the file "inplace" */
 757                 if (inplace)  {
 758                         fd2 = do_open(fname, O_WRONLY|O_CREAT, 0600);
 759                         if (fd2 == -1) {
 760                                 rsyserr(FERROR_XFER, errno, "open %s failed",
 761                                         full_fname(fname));
 762                         }
 763                 } else {
 764                         fd2 = open_tmpfile(fnametmp, fname, file);
 765                         if (fd2 != -1)
 766                                 cleanup_set(fnametmp, partialptr, file, fd1, fd2);
 767                 }
 768
 769                 if (fd2 == -1) {
 770                         discard_receive_data(f_in, F_LENGTH(file));
 771                         if (fd1 != -1)
 772                                 close(fd1);
 773                         if (inc_recurse)
 774                                 send_msg_int(MSG_NO_SEND, ndx);
 775                         continue;
 776                 }
 777
 778                 /* log the transfer */
 779                 if (log_before_transfer)
 780                         log_item(FCLIENT, file, iflags, NULL);
 781                 else if (!am_server && INFO_GTE(NAME, 1) && INFO_EQ(PROGRESS, 1))
 782                         rprintf(FINFO, "%s\n", fname);
 783
 784                 /* recv file data */
 785                 recv_ok = receive_data(f_in, fnamecmp, fd1, st.st_size,
 786                                        fname, fd2, F_LENGTH(file));
 787
 788                 log_item(log_code, file, iflags, NULL);
 789
 790                 if (fd1 != -1)
 791                         close(fd1);
 792                 if (close(fd2) < 0) {
 793                         rsyserr(FERROR, errno, "close failed on %s",
 794                                 full_fname(fnametmp));
 795                         exit_cleanup(RERR_FILEIO);
 796                 }
 797
 798                 if ((recv_ok && (!delay_updates || !partialptr)) || inplace) {
 799                         if (partialptr == fname)
 800                                 partialptr = NULL;
 801                         if (!finish_transfer(fname, fnametmp, fnamecmp,
 802                                              partialptr, file, recv_ok, 1))
 803                                 recv_ok = -1;
 804                         else if (fnamecmp == partialptr) {
 805                                 do_unlink(partialptr);
 806                                 handle_partial_dir(partialptr, PDIR_DELETE);
 807                         }
 808                 } else if (keep_partial && partialptr) {
 809                         if (!handle_partial_dir(partialptr, PDIR_CREATE)) {
 810                                 rprintf(FERROR,
 811                                     "Unable to create partial-dir for %s -- discarding %s.\n",
 812                                     local_name ? local_name : f_name(file, NULL),
 813                                     recv_ok ? "completed file" : "partial file");
 814                                 do_unlink(fnametmp);
 815                                 recv_ok = -1;
 816                         } else if (!finish_transfer(partialptr, fnametmp, fnamecmp, NULL,
 817                                                     file, recv_ok, !partial_dir))
 818                                 recv_ok = -1;
 819                         else if (delay_updates && recv_ok) {
 820                                 bitbag_set_bit(delayed_bits, ndx);
 821                                 recv_ok = 2;
 822                         } else
 823                                 partialptr = NULL;
 824                 } else
 825                         do_unlink(fnametmp);
 826
 827                 cleanup_disable();
 828
 829                 if (read_batch)
 830                         file->flags |= FLAG_FILE_SENT;
 831
 832                 switch (recv_ok) {
 833                 case 2:
 834                         break;
 835                 case 1:
 836                         if (remove_source_files || inc_recurse
 837                          || (preserve_hard_links && F_IS_HLINKED(file)))
 838                                 send_msg_int(MSG_SUCCESS, ndx);
 839                         break;
 840                 case 0: {
 841                         enum logcode msgtype = redoing ? FERROR_XFER : FWARNING;
 842                         if (msgtype == FERROR_XFER || INFO_GTE(NAME, 1)) {
 843                                 char *errstr, *redostr, *keptstr;
 844                                 if (!(keep_partial && partialptr) && !inplace)
 845                                         keptstr = "discarded";
 846                                 else if (partial_dir)
 847                                         keptstr = "put into partial-dir";
 848                                 else
 849                                         keptstr = "retained";
 850                                 if (msgtype == FERROR_XFER) {
 851                                         errstr = "ERROR";
 852                                         redostr = "";
 853                                 } else {
 854                                         errstr = "WARNING";
 855                                         redostr = read_batch ? " (may try again)"
 856                                                              : " (will try again)";
 857                                 }
 858                                 rprintf(msgtype,
 859                                         "%s: %s failed verification -- update %s%s.\n",
 860                                         errstr, local_name ? f_name(file, NULL) : fname,
 861                                         keptstr, redostr);
 862                         }
 863                         if (!redoing) {
 864                                 if (read_batch)
 865                                         flist_ndx_push(&batch_redo_list, ndx);
 866                                 send_msg_int(MSG_REDO, ndx);
 867                                 file->flags |= FLAG_FILE_SENT;
 868                         } else if (inc_recurse)
 869                                 send_msg_int(MSG_NO_SEND, ndx);
 870                         break;
 871                     }
 872                 case -1:
 873                         if (inc_recurse)
 874                                 send_msg_int(MSG_NO_SEND, ndx);
 875                         break;
 876                 }
 877         }
 878         if (make_backups < 0)
 879                 make_backups = -make_backups;
 880
 881         if (phase == 2 && delay_updates) /* for protocol_version < 29 */
 882                 handle_delayed_updates(local_name);
 883
 884         if (DEBUG_GTE(RECV, 1))
 885                 rprintf(FINFO,"recv_files finished\n");
 886
 887         return 0;
 888 }