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%s\n",
 289                                 i, (long)len, big_num(offset2), big_num(offset),
 290                                 updating_basis_or_equiv && offset == offset2 ? " (seek)" : "");
 291                 }
 292
 293                 if (mapbuf) {
 294                         map = map_ptr(mapbuf,offset2,len);
 295
 296                         see_token(map, len);
 297                         sum_update(map, len);
 298                 }
 299
 300                 if (updating_basis_or_equiv) {
 301                         if (offset == offset2 && fd != -1) {
 302                                 OFF_T pos;
 303                                 if (flush_write_file(fd) < 0)
 304                                         goto report_write_error;
 305                                 offset += len;
 306                                 if ((pos = do_lseek(fd, len, SEEK_CUR)) != offset) {
 307                                         rsyserr(FERROR_XFER, errno,
 308                                                 "lseek of %s returned %s, not %s",
 309                                                 full_fname(fname),
 310                                                 big_num(pos), big_num(offset));
 311                                         exit_cleanup(RERR_FILEIO);
 312                                 }
 313                                 continue;
 314                         }
 315                 }
 316                 if (fd != -1 && map && write_file(fd, map, len) != (int)len)
 317                         goto report_write_error;
 318                 offset += len;
 319         }
 320
 321         if (flush_write_file(fd) < 0)
 322                 goto report_write_error;
 323
 324 #ifdef HAVE_FTRUNCATE
 325         if (inplace && fd != -1
 326          && ftruncate(fd, offset) < 0) {
 327                 rsyserr(FERROR_XFER, errno, "ftruncate failed on %s",
 328                         full_fname(fname));
 329         }
 330 #endif
 331
 332         if (INFO_GTE(PROGRESS, 1))
 333                 end_progress(total_size);
 334
 335         if (fd != -1 && offset > 0 && sparse_end(fd) != 0) {
 336             report_write_error:
 337                 rsyserr(FERROR_XFER, errno, "write failed on %s",
 338                         full_fname(fname));
 339                 exit_cleanup(RERR_FILEIO);
 340         }
 341
 342         if (sum_end(file_sum1) != checksum_len)
 343                 overflow_exit("checksum_len"); /* Impossible... */
 344
 345         if (mapbuf)
 346                 unmap_file(mapbuf);
 347
 348         read_buf(f_in, sender_file_sum, checksum_len);
 349         if (DEBUG_GTE(DELTASUM, 2))
 350                 rprintf(FINFO,"got file_sum\n");
 351         if (fd != -1 && memcmp(file_sum1, sender_file_sum, checksum_len) != 0)
 352                 return 0;
 353         return 1;
 354 }
 355
 356
 357 static void discard_receive_data(int f_in, OFF_T length)
 358 {
 359         receive_data(f_in, NULL, -1, 0, NULL, -1, length);
 360 }
 361
 362 static void handle_delayed_updates(char *local_name)
 363 {
 364         char *fname, *partialptr;
 365         int ndx;
 366
 367         for (ndx = -1; (ndx = bitbag_next_bit(delayed_bits, ndx)) >= 0; ) {
 368                 struct file_struct *file = cur_flist->files[ndx];
 369                 fname = local_name ? local_name : f_name(file, NULL);
 370                 if ((partialptr = partial_dir_fname(fname)) != NULL) {
 371                         if (make_backups > 0 && !make_backup(fname, False))
 372                                 continue;
 373                         if (DEBUG_GTE(RECV, 1)) {
 374                                 rprintf(FINFO, "renaming %s to %s\n",
 375                                         partialptr, fname);
 376                         }
 377                         /* We don't use robust_rename() here because the
 378                          * partial-dir must be on the same drive. */
 379                         if (do_rename(partialptr, fname) < 0) {
 380                                 rsyserr(FERROR_XFER, errno,
 381                                         "rename failed for %s (from %s)",
 382                                         full_fname(fname), partialptr);
 383                         } else {
 384                                 if (remove_source_files
 385                                  || (preserve_hard_links && F_IS_HLINKED(file)))
 386                                         send_msg_int(MSG_SUCCESS, ndx);
 387                                 handle_partial_dir(partialptr, PDIR_DELETE);
 388                         }
 389                 }
 390         }
 391 }
 392
 393 static void no_batched_update(int ndx, BOOL is_redo)
 394 {
 395         struct file_list *flist = flist_for_ndx(ndx, "no_batched_update");
 396         struct file_struct *file = flist->files[ndx - flist->ndx_start];
 397
 398         rprintf(FERROR_XFER, "(No batched update for%s \"%s\")\n",
 399                 is_redo ? " resend of" : "", f_name(file, NULL));
 400
 401         if (inc_recurse && !dry_run)
 402                 send_msg_int(MSG_NO_SEND, ndx);
 403 }
 404
 405 static int we_want_redo(int desired_ndx)
 406 {
 407         static int redo_ndx = -1;
 408
 409         while (redo_ndx < desired_ndx) {
 410                 if (redo_ndx >= 0)
 411                         no_batched_update(redo_ndx, True);
 412                 if ((redo_ndx = flist_ndx_pop(&batch_redo_list)) < 0)
 413                         return 0;
 414         }
 415
 416         if (redo_ndx == desired_ndx) {
 417                 redo_ndx = -1;
 418                 return 1;
 419         }
 420
 421         return 0;
 422 }
 423
 424 static int gen_wants_ndx(int desired_ndx, int flist_num)
 425 {
 426         static int next_ndx = -1;
 427         static int done_cnt = 0;
 428         static BOOL got_eof = False;
 429
 430         if (got_eof)
 431                 return 0;
 432
 433         /* TODO: integrate gen-reading I/O into perform_io() so this is not needed? */
 434         io_flush(FULL_FLUSH);
 435
 436         while (next_ndx < desired_ndx) {
 437                 if (inc_recurse && flist_num <= done_cnt)
 438                         return 0;
 439                 if (next_ndx >= 0)
 440                         no_batched_update(next_ndx, False);
 441                 if ((next_ndx = read_int(batch_gen_fd)) < 0) {
 442                         if (inc_recurse) {
 443                                 done_cnt++;
 444                                 continue;
 445                         }
 446                         got_eof = True;
 447                         return 0;
 448                 }
 449         }
 450
 451         if (next_ndx == desired_ndx) {
 452                 next_ndx = -1;
 453                 return 1;
 454         }
 455
 456         return 0;
 457 }
 458
 459 /**
 460  * main routine for receiver process.
 461  *
 462  * Receiver process runs on the same host as the generator process. */
 463 int recv_files(int f_in, int f_out, char *local_name)
 464 {
 465         int fd1,fd2;
 466         STRUCT_STAT st;
 467         int iflags, xlen;
 468         char *fname, fbuf[MAXPATHLEN];
 469         char xname[MAXPATHLEN];
 470         char fnametmp[MAXPATHLEN];
 471         char *fnamecmp, *partialptr;
 472         char fnamecmpbuf[MAXPATHLEN];
 473         uchar fnamecmp_type;
 474         struct file_struct *file;
 475         int itemizing = am_server ? logfile_format_has_i : stdout_format_has_i;
 476         enum logcode log_code = log_before_transfer ? FLOG : FINFO;
 477         int max_phase = protocol_version >= 29 ? 2 : 1;
 478         int dflt_perms = (ACCESSPERMS & ~orig_umask);
 479 #ifdef SUPPORT_ACLS
 480         const char *parent_dirname = "";
 481 #endif
 482         int ndx, recv_ok;
 483
 484         if (DEBUG_GTE(RECV, 1))
 485                 rprintf(FINFO, "recv_files(%d) starting\n", cur_flist->used);
 486
 487         if (delay_updates)
 488                 delayed_bits = bitbag_create(cur_flist->used + 1);
 489
 490         while (1) {
 491                 cleanup_disable();
 492
 493                 /* This call also sets cur_flist. */
 494                 ndx = read_ndx_and_attrs(f_in, f_out, &iflags, &fnamecmp_type,
 495                                          xname, &xlen);
 496                 if (ndx == NDX_DONE) {
 497                         if (!am_server && INFO_GTE(PROGRESS, 2) && cur_flist) {
 498                                 set_current_file_index(NULL, 0);
 499                                 end_progress(0);
 500                         }
 501                         if (inc_recurse && first_flist) {
 502                                 if (read_batch) {
 503                                         ndx = first_flist->used + first_flist->ndx_start;
 504                                         gen_wants_ndx(ndx, first_flist->flist_num);
 505                                 }
 506                                 flist_free(first_flist);
 507                                 if (first_flist)
 508                                         continue;
 509                         } else if (read_batch && first_flist) {
 510                                 ndx = first_flist->used;
 511                                 gen_wants_ndx(ndx, first_flist->flist_num);
 512                         }
 513                         if (++phase > max_phase)
 514                                 break;
 515                         if (DEBUG_GTE(RECV, 1))
 516                                 rprintf(FINFO, "recv_files phase=%d\n", phase);
 517                         if (phase == 2 && delay_updates)
 518                                 handle_delayed_updates(local_name);
 519                         write_int(f_out, NDX_DONE);
 520                         continue;
 521                 }
 522
 523                 if (ndx - cur_flist->ndx_start >= 0)
 524                         file = cur_flist->files[ndx - cur_flist->ndx_start];
 525                 else
 526                         file = dir_flist->files[cur_flist->parent_ndx];
 527                 fname = local_name ? local_name : f_name(file, fbuf);
 528
 529                 if (DEBUG_GTE(RECV, 1))
 530                         rprintf(FINFO, "recv_files(%s)\n", fname);
 531
 532 #ifdef SUPPORT_XATTRS
 533                 if (iflags & ITEM_REPORT_XATTR && do_xfers)
 534                         recv_xattr_request(file, f_in);
 535 #endif
 536
 537                 if (!(iflags & ITEM_TRANSFER)) {
 538                         maybe_log_item(file, iflags, itemizing, xname);
 539 #ifdef SUPPORT_XATTRS
 540                         if (preserve_xattrs && iflags & ITEM_REPORT_XATTR && do_xfers)
 541                                 set_file_attrs(fname, file, NULL, fname, 0);
 542 #endif
 543                         if (iflags & ITEM_IS_NEW) {
 544                                 stats.created_files++;
 545                                 if (S_ISREG(file->mode)) {
 546                                         /* Nothing further to count. */
 547                                 } else if (S_ISDIR(file->mode))
 548                                         stats.created_dirs++;
 549 #ifdef SUPPORT_LINKS
 550                                 else if (S_ISLNK(file->mode))
 551                                         stats.created_symlinks++;
 552 #endif
 553                                 else if (IS_DEVICE(file->mode))
 554                                         stats.created_devices++;
 555                                 else
 556                                         stats.created_specials++;
 557                         }
 558                         continue;
 559                 }
 560                 if (phase == 2) {
 561                         rprintf(FERROR,
 562                                 "got transfer request in phase 2 [%s]\n",
 563                                 who_am_i());
 564                         exit_cleanup(RERR_PROTOCOL);
 565                 }
 566
 567                 if (file->flags & FLAG_FILE_SENT) {
 568                         if (csum_length == SHORT_SUM_LENGTH) {
 569                                 if (keep_partial && !partial_dir)
 570                                         make_backups = -make_backups; /* prevents double backup */
 571                                 if (append_mode)
 572                                         sparse_files = -sparse_files;
 573                                 append_mode = -append_mode;
 574                                 csum_length = SUM_LENGTH;
 575                                 redoing = 1;
 576                         }
 577                 } else {
 578                         if (csum_length != SHORT_SUM_LENGTH) {
 579                                 if (keep_partial && !partial_dir)
 580                                         make_backups = -make_backups;
 581                                 if (append_mode)
 582                                         sparse_files = -sparse_files;
 583                                 append_mode = -append_mode;
 584                                 csum_length = SHORT_SUM_LENGTH;
 585                                 redoing = 0;
 586                         }
 587                         if (iflags & ITEM_IS_NEW)
 588                                 stats.created_files++;
 589                 }
 590
 591                 if (!am_server && INFO_GTE(PROGRESS, 1))
 592                         set_current_file_index(file, ndx);
 593                 stats.xferred_files++;
 594                 stats.total_transferred_size += F_LENGTH(file);
 595
 596                 cleanup_got_literal = 0;
 597
 598                 if (daemon_filter_list.head
 599                     && check_filter(&daemon_filter_list, FLOG, fname, 0) < 0) {
 600                         rprintf(FERROR, "attempt to hack rsync failed.\n");
 601                         exit_cleanup(RERR_PROTOCOL);
 602                 }
 603
 604                 if (read_batch) {
 605                         int wanted = redoing
 606                                    ? we_want_redo(ndx)
 607                                    : gen_wants_ndx(ndx, cur_flist->flist_num);
 608                         if (!wanted) {
 609                                 rprintf(FINFO,
 610                                         "(Skipping batched update for%s \"%s\")\n",
 611                                         redoing ? " resend of" : "",
 612                                         fname);
 613                                 discard_receive_data(f_in, F_LENGTH(file));
 614                                 file->flags |= FLAG_FILE_SENT;
 615                                 continue;
 616                         }
 617                 }
 618
 619                 if (!log_before_transfer)
 620                         remember_initial_stats();
 621
 622                 if (!do_xfers) { /* log the transfer */
 623                         log_item(FCLIENT, file, iflags, NULL);
 624                         if (read_batch)
 625                                 discard_receive_data(f_in, F_LENGTH(file));
 626                         continue;
 627                 }
 628                 if (write_batch < 0) {
 629                         log_item(FCLIENT, file, iflags, NULL);
 630                         if (!am_server)
 631                                 discard_receive_data(f_in, F_LENGTH(file));
 632                         continue;
 633                 }
 634
 635                 partialptr = partial_dir ? partial_dir_fname(fname) : fname;
 636
 637                 if (protocol_version >= 29) {
 638                         switch (fnamecmp_type) {
 639                         case FNAMECMP_FNAME:
 640                                 fnamecmp = fname;
 641                                 break;
 642                         case FNAMECMP_PARTIAL_DIR:
 643                                 fnamecmp = partialptr;
 644                                 break;
 645                         case FNAMECMP_BACKUP:
 646                                 fnamecmp = get_backup_name(fname);
 647                                 break;
 648                         case FNAMECMP_FUZZY:
 649                                 if (file->dirname) {
 650                                         pathjoin(fnamecmpbuf, MAXPATHLEN,
 651                                                  file->dirname, xname);
 652                                         fnamecmp = fnamecmpbuf;
 653                                 } else
 654                                         fnamecmp = xname;
 655                                 break;
 656                         default:
 657                                 if (fnamecmp_type >= basis_dir_cnt) {
 658                                         rprintf(FERROR,
 659                                                 "invalid basis_dir index: %d.\n",
 660                                                 fnamecmp_type);
 661                                         exit_cleanup(RERR_PROTOCOL);
 662                                 }
 663                                 pathjoin(fnamecmpbuf, sizeof fnamecmpbuf,
 664                                          basis_dir[fnamecmp_type], fname);
 665                                 fnamecmp = fnamecmpbuf;
 666                                 break;
 667                         }
 668                         if (!fnamecmp || (daemon_filter_list.head
 669                           && check_filter(&daemon_filter_list, FLOG, fname, 0) < 0)) {
 670                                 fnamecmp = fname;
 671                                 fnamecmp_type = FNAMECMP_FNAME;
 672                         }
 673                 } else {
 674                         /* Reminder: --inplace && --partial-dir are never
 675                          * enabled at the same time. */
 676                         if (inplace && make_backups > 0) {
 677                                 if (!(fnamecmp = get_backup_name(fname)))
 678                                         fnamecmp = fname;
 679                                 else
 680                                         fnamecmp_type = FNAMECMP_BACKUP;
 681                         } else if (partial_dir && partialptr)
 682                                 fnamecmp = partialptr;
 683                         else
 684                                 fnamecmp = fname;
 685                 }
 686
 687                 /* open the file */
 688                 fd1 = do_open(fnamecmp, O_RDONLY, 0);
 689
 690                 if (fd1 == -1 && protocol_version < 29) {
 691                         if (fnamecmp != fname) {
 692                                 fnamecmp = fname;
 693                                 fd1 = do_open(fnamecmp, O_RDONLY, 0);
 694                         }
 695
 696                         if (fd1 == -1 && basis_dir[0]) {
 697                                 /* pre-29 allowed only one alternate basis */
 698                                 pathjoin(fnamecmpbuf, sizeof fnamecmpbuf,
 699                                          basis_dir[0], fname);
 700                                 fnamecmp = fnamecmpbuf;
 701                                 fd1 = do_open(fnamecmp, O_RDONLY, 0);
 702                         }
 703                 }
 704
 705                 updating_basis_or_equiv = inplace
 706                     && (fnamecmp == fname || fnamecmp_type == FNAMECMP_BACKUP);
 707
 708                 if (fd1 == -1) {
 709                         st.st_mode = 0;
 710                         st.st_size = 0;
 711                 } else if (do_fstat(fd1,&st) != 0) {
 712                         rsyserr(FERROR_XFER, errno, "fstat %s failed",
 713                                 full_fname(fnamecmp));
 714                         discard_receive_data(f_in, F_LENGTH(file));
 715                         close(fd1);
 716                         if (inc_recurse)
 717                                 send_msg_int(MSG_NO_SEND, ndx);
 718                         continue;
 719                 }
 720
 721                 if (fd1 != -1 && S_ISDIR(st.st_mode) && fnamecmp == fname) {
 722                         /* this special handling for directories
 723                          * wouldn't be necessary if robust_rename()
 724                          * and the underlying robust_unlink could cope
 725                          * with directories
 726                          */
 727                         rprintf(FERROR_XFER, "recv_files: %s is a directory\n",
 728                                 full_fname(fnamecmp));
 729                         discard_receive_data(f_in, F_LENGTH(file));
 730                         close(fd1);
 731                         if (inc_recurse)
 732                                 send_msg_int(MSG_NO_SEND, ndx);
 733                         continue;
 734                 }
 735
 736                 if (fd1 != -1 && !S_ISREG(st.st_mode)) {
 737                         close(fd1);
 738                         fd1 = -1;
 739                 }
 740
 741                 /* If we're not preserving permissions, change the file-list's
 742                  * mode based on the local permissions and some heuristics. */
 743                 if (!preserve_perms) {
 744                         int exists = fd1 != -1;
 745 #ifdef SUPPORT_ACLS
 746                         const char *dn = file->dirname ? file->dirname : ".";
 747                         if (parent_dirname != dn
 748                          && strcmp(parent_dirname, dn) != 0) {
 749                                 dflt_perms = default_perms_for_dir(dn);
 750                                 parent_dirname = dn;
 751                         }
 752 #endif
 753                         file->mode = dest_mode(file->mode, st.st_mode,
 754                                                dflt_perms, exists);
 755                 }
 756
 757                 /* We now check to see if we are writing the file "inplace" */
 758                 if (inplace)  {
 759                         fd2 = do_open(fname, O_WRONLY|O_CREAT, 0600);
 760                         if (fd2 == -1) {
 761                                 rsyserr(FERROR_XFER, errno, "open %s failed",
 762                                         full_fname(fname));
 763                         }
 764                 } else {
 765                         fd2 = open_tmpfile(fnametmp, fname, file);
 766                         if (fd2 != -1)
 767                                 cleanup_set(fnametmp, partialptr, file, fd1, fd2);
 768                 }
 769
 770                 if (fd2 == -1) {
 771                         discard_receive_data(f_in, F_LENGTH(file));
 772                         if (fd1 != -1)
 773                                 close(fd1);
 774                         if (inc_recurse)
 775                                 send_msg_int(MSG_NO_SEND, ndx);
 776                         continue;
 777                 }
 778
 779                 /* log the transfer */
 780                 if (log_before_transfer)
 781                         log_item(FCLIENT, file, iflags, NULL);
 782                 else if (!am_server && INFO_GTE(NAME, 1) && INFO_EQ(PROGRESS, 1))
 783                         rprintf(FINFO, "%s\n", fname);
 784
 785                 /* recv file data */
 786                 recv_ok = receive_data(f_in, fnamecmp, fd1, st.st_size,
 787                                        fname, fd2, F_LENGTH(file));
 788
 789                 log_item(log_code, file, iflags, NULL);
 790
 791                 if (fd1 != -1)
 792                         close(fd1);
 793                 if (close(fd2) < 0) {
 794                         rsyserr(FERROR, errno, "close failed on %s",
 795                                 full_fname(fnametmp));
 796                         exit_cleanup(RERR_FILEIO);
 797                 }
 798
 799                 if ((recv_ok && (!delay_updates || !partialptr)) || inplace) {
 800                         if (partialptr == fname)
 801                                 partialptr = NULL;
 802                         if (!finish_transfer(fname, fnametmp, fnamecmp,
 803                                              partialptr, file, recv_ok, 1))
 804                                 recv_ok = -1;
 805                         else if (fnamecmp == partialptr) {
 806                                 do_unlink(partialptr);
 807                                 handle_partial_dir(partialptr, PDIR_DELETE);
 808                         }
 809                 } else if (keep_partial && partialptr) {
 810                         if (!handle_partial_dir(partialptr, PDIR_CREATE)) {
 811                                 rprintf(FERROR,
 812                                     "Unable to create partial-dir for %s -- discarding %s.\n",
 813                                     local_name ? local_name : f_name(file, NULL),
 814                                     recv_ok ? "completed file" : "partial file");
 815                                 do_unlink(fnametmp);
 816                                 recv_ok = -1;
 817                         } else if (!finish_transfer(partialptr, fnametmp, fnamecmp, NULL,
 818                                                     file, recv_ok, !partial_dir))
 819                                 recv_ok = -1;
 820                         else if (delay_updates && recv_ok) {
 821                                 bitbag_set_bit(delayed_bits, ndx);
 822                                 recv_ok = 2;
 823                         } else
 824                                 partialptr = NULL;
 825                 } else
 826                         do_unlink(fnametmp);
 827
 828                 cleanup_disable();
 829
 830                 if (read_batch)
 831                         file->flags |= FLAG_FILE_SENT;
 832
 833                 switch (recv_ok) {
 834                 case 2:
 835                         break;
 836                 case 1:
 837                         if (remove_source_files || inc_recurse
 838                          || (preserve_hard_links && F_IS_HLINKED(file)))
 839                                 send_msg_int(MSG_SUCCESS, ndx);
 840                         break;
 841                 case 0: {
 842                         enum logcode msgtype = redoing ? FERROR_XFER : FWARNING;
 843                         if (msgtype == FERROR_XFER || INFO_GTE(NAME, 1)) {
 844                                 char *errstr, *redostr, *keptstr;
 845                                 if (!(keep_partial && partialptr) && !inplace)
 846                                         keptstr = "discarded";
 847                                 else if (partial_dir)
 848                                         keptstr = "put into partial-dir";
 849                                 else
 850                                         keptstr = "retained";
 851                                 if (msgtype == FERROR_XFER) {
 852                                         errstr = "ERROR";
 853                                         redostr = "";
 854                                 } else {
 855                                         errstr = "WARNING";
 856                                         redostr = read_batch ? " (may try again)"
 857                                                              : " (will try again)";
 858                                 }
 859                                 rprintf(msgtype,
 860                                         "%s: %s failed verification -- update %s%s.\n",
 861                                         errstr, local_name ? f_name(file, NULL) : fname,
 862                                         keptstr, redostr);
 863                         }
 864                         if (!redoing) {
 865                                 if (read_batch)
 866                                         flist_ndx_push(&batch_redo_list, ndx);
 867                                 send_msg_int(MSG_REDO, ndx);
 868                                 file->flags |= FLAG_FILE_SENT;
 869                         } else if (inc_recurse)
 870                                 send_msg_int(MSG_NO_SEND, ndx);
 871                         break;
 872                     }
 873                 case -1:
 874                         if (inc_recurse)
 875                                 send_msg_int(MSG_NO_SEND, ndx);
 876                         break;
 877                 }
 878         }
 879         if (make_backups < 0)
 880                 make_backups = -make_backups;
 881
 882         if (phase == 2 && delay_updates) /* for protocol_version < 29 */
 883                 handle_delayed_updates(local_name);
 884
 885         if (DEBUG_GTE(RECV, 1))
 886                 rprintf(FINFO,"recv_files finished\n");
 887
 888         return 0;
 889 }