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) 2003-2020 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_root;
  28 extern int am_server;
  29 extern int inc_recurse;
  30 extern int log_before_transfer;
  31 extern int stdout_format_has_i;
  32 extern int logfile_format_has_i;
  33 extern int want_xattr_optim;
  34 extern int csum_length;
  35 extern int read_batch;
  36 extern int write_batch;
  37 extern int batch_gen_fd;
  38 extern int protocol_version;
  39 extern int relative_paths;
  40 extern int preserve_hard_links;
  41 extern int preserve_perms;
  42 extern int write_devices;
  43 extern int preserve_xattrs;
  44 extern int basis_dir_cnt;
  45 extern int make_backups;
  46 extern int cleanup_got_literal;
  47 extern int remove_source_files;
  48 extern int append_mode;
  49 extern int sparse_files;
  50 extern int preallocate_files;
  51 extern int keep_partial;
  52 extern int checksum_seed;
  53 extern int whole_file;
  54 extern int inplace;
  55 extern int inplace_partial;
  56 extern int allowed_lull;
  57 extern int delay_updates;
  58 extern int xfersum_type;
  59 extern BOOL want_progress_now;
  60 extern mode_t orig_umask;
  61 extern struct stats stats;
  62 extern char *tmpdir;
  63 extern char *partial_dir;
  64 extern char *basis_dir[MAX_BASIS_DIRS+1];
  65 extern char sender_file_sum[MAX_DIGEST_LEN];
  66 extern struct file_list *cur_flist, *first_flist, *dir_flist;
  67 extern filter_rule_list daemon_filter_list;
  68 extern OFF_T preallocated_len;
  69
  70 static struct bitbag *delayed_bits = NULL;
  71 static int phase = 0, redoing = 0;
  72 static flist_ndx_list batch_redo_list;
  73 /* This is non-0 when we are updating the basis file or an identical copy: */
  74 static int updating_basis_or_equiv;
  75
  76 #define TMPNAME_SUFFIX ".XXXXXX"
  77 #define TMPNAME_SUFFIX_LEN ((int)sizeof TMPNAME_SUFFIX - 1)
  78 #define MAX_UNIQUE_NUMBER 999999
  79 #define MAX_UNIQUE_LOOP 100
  80
  81 /* get_tmpname() - create a tmp filename for a given filename
  82  *
  83  * If a tmpdir is defined, use that as the directory to put it in.  Otherwise,
  84  * the tmp filename is in the same directory as the given name.  Note that
  85  * there may be no directory at all in the given name!
  86  *
  87  * The tmp filename is basically the given filename with a dot prepended, and
  88  * .XXXXXX appended (for mkstemp() to put its unique gunk in).  We take care
  89  * to not exceed either the MAXPATHLEN or NAME_MAX, especially the last, as
  90  * the basename basically becomes 8 characters longer.  In such a case, the
  91  * original name is shortened sufficiently to make it all fit.
  92  *
  93  * If the make_unique arg is True, the XXXXXX string is replaced with a unique
  94  * string that doesn't exist at the time of the check.  This is intended to be
  95  * used for creating hard links, symlinks, devices, and special files, since
  96  * normal files should be handled by mkstemp() for safety.
  97  *
  98  * Of course, the only reason the file is based on the original name is to
  99  * make it easier to figure out what purpose a temp file is serving when a
 100  * transfer is in progress. */
 101 int get_tmpname(char *fnametmp, const char *fname, BOOL make_unique)
 102 {
 103         int maxname, length = 0;
 104         const char *f;
 105         char *suf;
 106
 107         if (tmpdir) {
 108                 /* Note: this can't overflow, so the return value is safe */
 109                 length = strlcpy(fnametmp, tmpdir, MAXPATHLEN - 2);
 110                 fnametmp[length++] = '/';
 111         }
 112
 113         if ((f = strrchr(fname, '/')) != NULL) {
 114                 ++f;
 115                 if (!tmpdir) {
 116                         length = f - fname;
 117                         /* copy up to and including the slash */
 118                         strlcpy(fnametmp, fname, length + 1);
 119                 }
 120         } else
 121                 f = fname;
 122
 123         if (!tmpdir) { /* using a tmpdir avoids the leading dot on our temp names */
 124                 if (*f == '.') /* avoid an extra leading dot for OS X's sake */
 125                         f++;
 126                 fnametmp[length++] = '.';
 127         }
 128
 129         /* The maxname value is bufsize, and includes space for the '\0'.
 130          * NAME_MAX needs an extra -1 for the name's leading dot. */
 131         maxname = MIN(MAXPATHLEN - length - TMPNAME_SUFFIX_LEN,
 132                       NAME_MAX - 1 - TMPNAME_SUFFIX_LEN);
 133
 134         if (maxname < 0) {
 135                 rprintf(FERROR_XFER, "temporary filename too long: %s\n", fname);
 136                 fnametmp[0] = '\0';
 137                 return 0;
 138         }
 139
 140         if (maxname) {
 141                 int added = strlcpy(fnametmp + length, f, maxname);
 142                 if (added >= maxname)
 143                         added = maxname - 1;
 144                 suf = fnametmp + length + added;
 145
 146                 /* Trim any dangling high-bit chars if the first-trimmed char (if any) is
 147                  * also a high-bit char, just in case we cut into a multi-byte sequence.
 148                  * We are guaranteed to stop because of the leading '.' we added. */
 149                 if ((int)f[added] & 0x80) {
 150                         while ((int)suf[-1] & 0x80)
 151                                 suf--;
 152                 }
 153                 /* trim one trailing dot before our suffix's dot */
 154                 if (suf[-1] == '.')
 155                         suf--;
 156         } else
 157                 suf = fnametmp + length - 1; /* overwrite the leading dot with suffix's dot */
 158
 159         if (make_unique) {
 160                 static unsigned counter_limit;
 161                 unsigned counter;
 162
 163                 if (!counter_limit) {
 164                         counter_limit = (unsigned)getpid() + MAX_UNIQUE_LOOP;
 165                         if (counter_limit > MAX_UNIQUE_NUMBER || counter_limit < MAX_UNIQUE_LOOP)
 166                                 counter_limit = MAX_UNIQUE_LOOP;
 167                 }
 168                 counter = counter_limit - MAX_UNIQUE_LOOP;
 169
 170                 /* This doesn't have to be very good because we don't need
 171                  * to worry about someone trying to guess the values:  all
 172                  * a conflict will do is cause a device, special file, hard
 173                  * link, or symlink to fail to be created.  Also: avoid
 174                  * using mktemp() due to gcc's annoying warning. */
 175                 while (1) {
 176                         snprintf(suf, TMPNAME_SUFFIX_LEN+1, ".%d", counter);
 177                         if (access(fnametmp, 0) < 0)
 178                                 break;
 179                         if (++counter >= counter_limit)
 180                                 return 0;
 181                 }
 182         } else
 183                 memcpy(suf, TMPNAME_SUFFIX, TMPNAME_SUFFIX_LEN+1);
 184
 185         return 1;
 186 }
 187
 188 /* Opens a temporary file for writing.
 189  * Success: Writes name into fnametmp, returns fd.
 190  * Failure: Clobbers fnametmp, returns -1.
 191  * Calling cleanup_set() is the caller's job. */
 192 int open_tmpfile(char *fnametmp, const char *fname, struct file_struct *file)
 193 {
 194         int fd;
 195         mode_t added_perms;
 196
 197         if (!get_tmpname(fnametmp, fname, False))
 198                 return -1;
 199
 200         if (am_root < 0) {
 201                 /* For --fake-super, the file must be useable by the copying
 202                  * user, just like it would be for root. */
 203                 added_perms = S_IRUSR|S_IWUSR;
 204         } else {
 205                 /* For a normal copy, we need to be able to tweak things like xattrs. */
 206                 added_perms = S_IWUSR;
 207         }
 208
 209         /* We initially set the perms without the setuid/setgid bits or group
 210          * access to ensure that there is no race condition.  They will be
 211          * correctly updated after the right owner and group info is set.
 212          * (Thanks to snabb@epipe.fi for pointing this out.) */
 213         fd = do_mkstemp(fnametmp, (file->mode|added_perms) & INITACCESSPERMS);
 214
 215 #if 0
 216         /* In most cases parent directories will already exist because their
 217          * information should have been previously transferred, but that may
 218          * not be the case with -R */
 219         if (fd == -1 && relative_paths && errno == ENOENT
 220          && make_path(fnametmp, MKP_SKIP_SLASH | MKP_DROP_NAME) == 0) {
 221                 /* Get back to name with XXXXXX in it. */
 222                 get_tmpname(fnametmp, fname, False);
 223                 fd = do_mkstemp(fnametmp, (file->mode|added_perms) & INITACCESSPERMS);
 224         }
 225 #endif
 226
 227         if (fd == -1) {
 228                 rsyserr(FERROR_XFER, errno, "mkstemp %s failed",
 229                         full_fname(fnametmp));
 230                 return -1;
 231         }
 232
 233         return fd;
 234 }
 235
 236 static int receive_data(int f_in, char *fname_r, int fd_r, OFF_T size_r,
 237                         const char *fname, int fd, struct file_struct *file, int inplace_sizing)
 238 {
 239         static char file_sum1[MAX_DIGEST_LEN];
 240         struct map_struct *mapbuf;
 241         struct sum_struct sum;
 242         int sum_len;
 243         int32 len;
 244         OFF_T total_size = F_LENGTH(file);
 245         OFF_T offset = 0;
 246         OFF_T offset2;
 247         char *data;
 248         int32 i;
 249         char *map = NULL;
 250
 251 #ifdef SUPPORT_PREALLOCATION
 252         if (preallocate_files && fd != -1 && total_size > 0 && (!inplace_sizing || total_size > size_r)) {
 253                 /* Try to preallocate enough space for file's eventual length.  Can
 254                  * reduce fragmentation on filesystems like ext4, xfs, and NTFS. */
 255                 if ((preallocated_len = do_fallocate(fd, 0, total_size)) < 0)
 256                         rsyserr(FWARNING, errno, "do_fallocate %s", full_fname(fname));
 257         } else
 258 #endif
 259         if (inplace_sizing) {
 260 #ifdef HAVE_FTRUNCATE
 261                 /* The most compatible way to create a sparse file is to start with no length. */
 262                 if (sparse_files > 0 && whole_file && fd >= 0 && do_ftruncate(fd, 0) == 0)
 263                         preallocated_len = 0;
 264                 else
 265 #endif
 266                         preallocated_len = size_r;
 267         } else
 268                 preallocated_len = 0;
 269
 270         read_sum_head(f_in, &sum);
 271
 272         if (fd_r >= 0 && size_r > 0) {
 273                 int32 read_size = MAX(sum.blength * 2, 16*1024);
 274                 mapbuf = map_file(fd_r, size_r, read_size, sum.blength);
 275                 if (DEBUG_GTE(DELTASUM, 2)) {
 276                         rprintf(FINFO, "recv mapped %s of size %s\n",
 277                                 fname_r, big_num(size_r));
 278                 }
 279         } else
 280                 mapbuf = NULL;
 281
 282         sum_init(xfersum_type, checksum_seed);
 283
 284         if (append_mode > 0) {
 285                 OFF_T j;
 286                 sum.flength = (OFF_T)sum.count * sum.blength;
 287                 if (sum.remainder)
 288                         sum.flength -= sum.blength - sum.remainder;
 289                 if (append_mode == 2 && mapbuf) {
 290                         for (j = CHUNK_SIZE; j < sum.flength; j += CHUNK_SIZE) {
 291                                 if (INFO_GTE(PROGRESS, 1))
 292                                         show_progress(offset, total_size);
 293                                 sum_update(map_ptr(mapbuf, offset, CHUNK_SIZE),
 294                                            CHUNK_SIZE);
 295                                 offset = j;
 296                         }
 297                         if (offset < sum.flength) {
 298                                 int32 len = (int32)(sum.flength - offset);
 299                                 if (INFO_GTE(PROGRESS, 1))
 300                                         show_progress(offset, total_size);
 301                                 sum_update(map_ptr(mapbuf, offset, len), len);
 302                         }
 303                 }
 304                 offset = sum.flength;
 305                 if (fd != -1 && (j = do_lseek(fd, offset, SEEK_SET)) != offset) {
 306                         rsyserr(FERROR_XFER, errno, "lseek of %s returned %s, not %s",
 307                                 full_fname(fname), big_num(j), big_num(offset));
 308                         exit_cleanup(RERR_FILEIO);
 309                 }
 310         }
 311
 312         while ((i = recv_token(f_in, &data)) != 0) {
 313                 if (INFO_GTE(PROGRESS, 1))
 314                         show_progress(offset, total_size);
 315
 316                 if (allowed_lull)
 317                         maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH | MSK_ACTIVE_RECEIVER);
 318
 319                 if (i > 0) {
 320                         if (DEBUG_GTE(DELTASUM, 3)) {
 321                                 rprintf(FINFO,"data recv %d at %s\n",
 322                                         i, big_num(offset));
 323                         }
 324
 325                         stats.literal_data += i;
 326                         cleanup_got_literal = 1;
 327
 328                         sum_update(data, i);
 329
 330                         if (fd != -1 && write_file(fd, 0, offset, data, i) != i)
 331                                 goto report_write_error;
 332                         offset += i;
 333                         continue;
 334                 }
 335
 336                 i = -(i+1);
 337                 offset2 = i * (OFF_T)sum.blength;
 338                 len = sum.blength;
 339                 if (i == (int)sum.count-1 && sum.remainder != 0)
 340                         len = sum.remainder;
 341
 342                 stats.matched_data += len;
 343
 344                 if (DEBUG_GTE(DELTASUM, 3)) {
 345                         rprintf(FINFO,
 346                                 "chunk[%d] of size %ld at %s offset=%s%s\n",
 347                                 i, (long)len, big_num(offset2), big_num(offset),
 348                                 updating_basis_or_equiv && offset == offset2 ? " (seek)" : "");
 349                 }
 350
 351                 if (mapbuf) {
 352                         map = map_ptr(mapbuf,offset2,len);
 353
 354                         see_token(map, len);
 355                         sum_update(map, len);
 356                 }
 357
 358                 if (updating_basis_or_equiv) {
 359                         if (offset == offset2 && fd != -1) {
 360                                 if (skip_matched(fd, offset, map, len) < 0)
 361                                         goto report_write_error;
 362                                 offset += len;
 363                                 continue;
 364                         }
 365                 }
 366                 if (fd != -1 && map && write_file(fd, 0, offset, map, len) != (int)len)
 367                         goto report_write_error;
 368                 offset += len;
 369         }
 370
 371         if (fd != -1 && offset > 0) {
 372                 if (sparse_files > 0) {
 373                         if (sparse_end(fd, offset) != 0)
 374                                 goto report_write_error;
 375                 } else if (flush_write_file(fd) < 0) {
 376                     report_write_error:
 377                         rsyserr(FERROR_XFER, errno, "write failed on %s", full_fname(fname));
 378                         exit_cleanup(RERR_FILEIO);
 379                 }
 380         }
 381
 382 #ifdef HAVE_FTRUNCATE
 383         /* inplace: New data could be shorter than old data.
 384          * preallocate_files: total_size could have been an overestimate.
 385          *     Cut off any extra preallocated zeros from dest file. */
 386         if ((inplace_sizing || preallocated_len > offset) && fd != -1 && !IS_DEVICE(file->mode)) {
 387                 if (do_ftruncate(fd, offset) < 0)
 388                         rsyserr(FERROR_XFER, errno, "ftruncate failed on %s", full_fname(fname));
 389         }
 390 #endif
 391
 392         if (INFO_GTE(PROGRESS, 1))
 393                 end_progress(total_size);
 394
 395         sum_len = sum_end(file_sum1);
 396
 397         if (mapbuf)
 398                 unmap_file(mapbuf);
 399
 400         read_buf(f_in, sender_file_sum, sum_len);
 401         if (DEBUG_GTE(DELTASUM, 2))
 402                 rprintf(FINFO,"got file_sum\n");
 403         if (fd != -1 && memcmp(file_sum1, sender_file_sum, sum_len) != 0)
 404                 return 0;
 405         return 1;
 406 }
 407
 408
 409 static void discard_receive_data(int f_in, struct file_struct *file)
 410 {
 411         receive_data(f_in, NULL, -1, 0, NULL, -1, file, 0);
 412 }
 413
 414 static void handle_delayed_updates(char *local_name)
 415 {
 416         char *fname, *partialptr;
 417         int ndx;
 418
 419         for (ndx = -1; (ndx = bitbag_next_bit(delayed_bits, ndx)) >= 0; ) {
 420                 struct file_struct *file = cur_flist->files[ndx];
 421                 fname = local_name ? local_name : f_name(file, NULL);
 422                 if ((partialptr = partial_dir_fname(fname)) != NULL) {
 423                         if (make_backups > 0 && !make_backup(fname, False))
 424                                 continue;
 425                         if (DEBUG_GTE(RECV, 1)) {
 426                                 rprintf(FINFO, "renaming %s to %s\n",
 427                                         partialptr, fname);
 428                         }
 429                         /* We don't use robust_rename() here because the
 430                          * partial-dir must be on the same drive. */
 431                         if (do_rename(partialptr, fname) < 0) {
 432                                 rsyserr(FERROR_XFER, errno,
 433                                         "rename failed for %s (from %s)",
 434                                         full_fname(fname), partialptr);
 435                         } else {
 436                                 if (remove_source_files
 437                                  || (preserve_hard_links && F_IS_HLINKED(file)))
 438                                         send_msg_int(MSG_SUCCESS, ndx);
 439                                 handle_partial_dir(partialptr, PDIR_DELETE);
 440                         }
 441                 }
 442         }
 443 }
 444
 445 static void no_batched_update(int ndx, BOOL is_redo)
 446 {
 447         struct file_list *flist = flist_for_ndx(ndx, "no_batched_update");
 448         struct file_struct *file = flist->files[ndx - flist->ndx_start];
 449
 450         rprintf(FERROR_XFER, "(No batched update for%s \"%s\")\n",
 451                 is_redo ? " resend of" : "", f_name(file, NULL));
 452
 453         if (inc_recurse && !dry_run)
 454                 send_msg_int(MSG_NO_SEND, ndx);
 455 }
 456
 457 static int we_want_redo(int desired_ndx)
 458 {
 459         static int redo_ndx = -1;
 460
 461         while (redo_ndx < desired_ndx) {
 462                 if (redo_ndx >= 0)
 463                         no_batched_update(redo_ndx, True);
 464                 if ((redo_ndx = flist_ndx_pop(&batch_redo_list)) < 0)
 465                         return 0;
 466         }
 467
 468         if (redo_ndx == desired_ndx) {
 469                 redo_ndx = -1;
 470                 return 1;
 471         }
 472
 473         return 0;
 474 }
 475
 476 static int gen_wants_ndx(int desired_ndx, int flist_num)
 477 {
 478         static int next_ndx = -1;
 479         static int done_cnt = 0;
 480         static BOOL got_eof = False;
 481
 482         if (got_eof)
 483                 return 0;
 484
 485         /* TODO: integrate gen-reading I/O into perform_io() so this is not needed? */
 486         io_flush(FULL_FLUSH);
 487
 488         while (next_ndx < desired_ndx) {
 489                 if (inc_recurse && flist_num <= done_cnt)
 490                         return 0;
 491                 if (next_ndx >= 0)
 492                         no_batched_update(next_ndx, False);
 493                 if ((next_ndx = read_int(batch_gen_fd)) < 0) {
 494                         if (inc_recurse) {
 495                                 done_cnt++;
 496                                 continue;
 497                         }
 498                         got_eof = True;
 499                         return 0;
 500                 }
 501         }
 502
 503         if (next_ndx == desired_ndx) {
 504                 next_ndx = -1;
 505                 return 1;
 506         }
 507
 508         return 0;
 509 }
 510
 511 /**
 512  * main routine for receiver process.
 513  *
 514  * Receiver process runs on the same host as the generator process. */
 515 int recv_files(int f_in, int f_out, char *local_name)
 516 {
 517         int fd1,fd2;
 518         STRUCT_STAT st;
 519         int iflags, xlen;
 520         char *fname, fbuf[MAXPATHLEN];
 521         char xname[MAXPATHLEN];
 522         char *fnametmp, fnametmpbuf[MAXPATHLEN];
 523         char *fnamecmp, *partialptr;
 524         char fnamecmpbuf[MAXPATHLEN];
 525         uchar fnamecmp_type;
 526         struct file_struct *file;
 527         int itemizing = am_server ? logfile_format_has_i : stdout_format_has_i;
 528         enum logcode log_code = log_before_transfer ? FLOG : FINFO;
 529         int max_phase = protocol_version >= 29 ? 2 : 1;
 530         int dflt_perms = (ACCESSPERMS & ~orig_umask);
 531 #ifdef SUPPORT_ACLS
 532         const char *parent_dirname = "";
 533 #endif
 534         int ndx, recv_ok, one_inplace;
 535
 536         if (DEBUG_GTE(RECV, 1))
 537                 rprintf(FINFO, "recv_files(%d) starting\n", cur_flist->used);
 538
 539         if (delay_updates)
 540                 delayed_bits = bitbag_create(cur_flist->used + 1);
 541
 542         progress_init();
 543
 544         while (1) {
 545                 cleanup_disable();
 546
 547                 /* This call also sets cur_flist. */
 548                 ndx = read_ndx_and_attrs(f_in, f_out, &iflags, &fnamecmp_type,
 549                                          xname, &xlen);
 550                 if (ndx == NDX_DONE) {
 551                         if (!am_server && cur_flist) {
 552                                 set_current_file_index(NULL, 0);
 553                                 if (INFO_GTE(PROGRESS, 2))
 554                                         end_progress(0);
 555                         }
 556                         if (inc_recurse && first_flist) {
 557                                 if (read_batch) {
 558                                         ndx = first_flist->used + first_flist->ndx_start;
 559                                         gen_wants_ndx(ndx, first_flist->flist_num);
 560                                 }
 561                                 flist_free(first_flist);
 562                                 if (first_flist)
 563                                         continue;
 564                         } else if (read_batch && first_flist) {
 565                                 ndx = first_flist->used;
 566                                 gen_wants_ndx(ndx, first_flist->flist_num);
 567                         }
 568                         if (++phase > max_phase)
 569                                 break;
 570                         if (DEBUG_GTE(RECV, 1))
 571                                 rprintf(FINFO, "recv_files phase=%d\n", phase);
 572                         if (phase == 2 && delay_updates)
 573                                 handle_delayed_updates(local_name);
 574                         write_int(f_out, NDX_DONE);
 575                         continue;
 576                 }
 577
 578                 if (ndx - cur_flist->ndx_start >= 0)
 579                         file = cur_flist->files[ndx - cur_flist->ndx_start];
 580                 else
 581                         file = dir_flist->files[cur_flist->parent_ndx];
 582                 fname = local_name ? local_name : f_name(file, fbuf);
 583
 584                 if (DEBUG_GTE(RECV, 1))
 585                         rprintf(FINFO, "recv_files(%s)\n", fname);
 586
 587                 if (daemon_filter_list.head && (*fname != '.' || fname[1] != '\0')
 588                  && check_filter(&daemon_filter_list, FLOG, fname, 0) < 0) {
 589                         rprintf(FERROR, "attempt to hack rsync failed.\n");
 590                         exit_cleanup(RERR_PROTOCOL);
 591                 }
 592
 593 #ifdef SUPPORT_XATTRS
 594                 if (preserve_xattrs && iflags & ITEM_REPORT_XATTR && do_xfers
 595                  && !(want_xattr_optim && BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE)))
 596                         recv_xattr_request(file, f_in);
 597 #endif
 598
 599                 if (!(iflags & ITEM_TRANSFER)) {
 600                         maybe_log_item(file, iflags, itemizing, xname);
 601 #ifdef SUPPORT_XATTRS
 602                         if (preserve_xattrs && iflags & ITEM_REPORT_XATTR && do_xfers
 603                          && !BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE))
 604                                 set_file_attrs(fname, file, NULL, fname, 0);
 605 #endif
 606                         if (iflags & ITEM_IS_NEW) {
 607                                 stats.created_files++;
 608                                 if (S_ISREG(file->mode)) {
 609                                         /* Nothing further to count. */
 610                                 } else if (S_ISDIR(file->mode))
 611                                         stats.created_dirs++;
 612 #ifdef SUPPORT_LINKS
 613                                 else if (S_ISLNK(file->mode))
 614                                         stats.created_symlinks++;
 615 #endif
 616                                 else if (IS_DEVICE(file->mode))
 617                                         stats.created_devices++;
 618                                 else
 619                                         stats.created_specials++;
 620                         }
 621                         continue;
 622                 }
 623                 if (phase == 2) {
 624                         rprintf(FERROR,
 625                                 "got transfer request in phase 2 [%s]\n",
 626                                 who_am_i());
 627                         exit_cleanup(RERR_PROTOCOL);
 628                 }
 629
 630                 if (file->flags & FLAG_FILE_SENT) {
 631                         if (csum_length == SHORT_SUM_LENGTH) {
 632                                 if (keep_partial && !partial_dir)
 633                                         make_backups = -make_backups; /* prevents double backup */
 634                                 if (append_mode)
 635                                         sparse_files = -sparse_files;
 636                                 append_mode = -append_mode;
 637                                 csum_length = SUM_LENGTH;
 638                                 redoing = 1;
 639                         }
 640                 } else {
 641                         if (csum_length != SHORT_SUM_LENGTH) {
 642                                 if (keep_partial && !partial_dir)
 643                                         make_backups = -make_backups;
 644                                 if (append_mode)
 645                                         sparse_files = -sparse_files;
 646                                 append_mode = -append_mode;
 647                                 csum_length = SHORT_SUM_LENGTH;
 648                                 redoing = 0;
 649                         }
 650                         if (iflags & ITEM_IS_NEW)
 651                                 stats.created_files++;
 652                 }
 653
 654                 if (!am_server)
 655                         set_current_file_index(file, ndx);
 656                 stats.xferred_files++;
 657                 stats.total_transferred_size += F_LENGTH(file);
 658
 659                 cleanup_got_literal = 0;
 660
 661                 if (read_batch) {
 662                         int wanted = redoing
 663                                    ? we_want_redo(ndx)
 664                                    : gen_wants_ndx(ndx, cur_flist->flist_num);
 665                         if (!wanted) {
 666                                 rprintf(FINFO,
 667                                         "(Skipping batched update for%s \"%s\")\n",
 668                                         redoing ? " resend of" : "",
 669                                         fname);
 670                                 discard_receive_data(f_in, file);
 671                                 file->flags |= FLAG_FILE_SENT;
 672                                 continue;
 673                         }
 674                 }
 675
 676                 remember_initial_stats();
 677
 678                 if (!do_xfers) { /* log the transfer */
 679                         log_item(FCLIENT, file, iflags, NULL);
 680                         if (read_batch)
 681                                 discard_receive_data(f_in, file);
 682                         continue;
 683                 }
 684                 if (write_batch < 0) {
 685                         log_item(FCLIENT, file, iflags, NULL);
 686                         if (!am_server)
 687                                 discard_receive_data(f_in, file);
 688                         if (inc_recurse)
 689                                 send_msg_int(MSG_SUCCESS, ndx);
 690                         continue;
 691                 }
 692
 693                 partialptr = partial_dir ? partial_dir_fname(fname) : fname;
 694
 695                 if (protocol_version >= 29) {
 696                         switch (fnamecmp_type) {
 697                         case FNAMECMP_FNAME:
 698                                 fnamecmp = fname;
 699                                 break;
 700                         case FNAMECMP_PARTIAL_DIR:
 701                                 fnamecmp = partialptr;
 702                                 break;
 703                         case FNAMECMP_BACKUP:
 704                                 fnamecmp = get_backup_name(fname);
 705                                 break;
 706                         case FNAMECMP_FUZZY:
 707                                 if (file->dirname) {
 708                                         pathjoin(fnamecmpbuf, sizeof fnamecmpbuf, file->dirname, xname);
 709                                         fnamecmp = fnamecmpbuf;
 710                                 } else
 711                                         fnamecmp = xname;
 712                                 break;
 713                         default:
 714                                 if (fnamecmp_type > FNAMECMP_FUZZY && fnamecmp_type-FNAMECMP_FUZZY <= basis_dir_cnt) {
 715                                         fnamecmp_type -= FNAMECMP_FUZZY + 1;
 716                                         if (file->dirname) {
 717                                                 stringjoin(fnamecmpbuf, sizeof fnamecmpbuf,
 718                                                            basis_dir[fnamecmp_type], "/", file->dirname, "/", xname, NULL);
 719                                         } else
 720                                                 pathjoin(fnamecmpbuf, sizeof fnamecmpbuf, basis_dir[fnamecmp_type], xname);
 721                                 } else if (fnamecmp_type >= basis_dir_cnt) {
 722                                         rprintf(FERROR,
 723                                                 "invalid basis_dir index: %d.\n",
 724                                                 fnamecmp_type);
 725                                         exit_cleanup(RERR_PROTOCOL);
 726                                 } else
 727                                         pathjoin(fnamecmpbuf, sizeof fnamecmpbuf, basis_dir[fnamecmp_type], fname);
 728                                 fnamecmp = fnamecmpbuf;
 729                                 break;
 730                         }
 731                         if (!fnamecmp || (daemon_filter_list.head
 732                           && check_filter(&daemon_filter_list, FLOG, fnamecmp, 0) < 0)) {
 733                                 fnamecmp = fname;
 734                                 fnamecmp_type = FNAMECMP_FNAME;
 735                         }
 736                 } else {
 737                         /* Reminder: --inplace && --partial-dir are never
 738                          * enabled at the same time. */
 739                         if (inplace && make_backups > 0) {
 740                                 if (!(fnamecmp = get_backup_name(fname)))
 741                                         fnamecmp = fname;
 742                                 else
 743                                         fnamecmp_type = FNAMECMP_BACKUP;
 744                         } else if (partial_dir && partialptr)
 745                                 fnamecmp = partialptr;
 746                         else
 747                                 fnamecmp = fname;
 748                 }
 749
 750                 /* open the file */
 751                 fd1 = do_open(fnamecmp, O_RDONLY, 0);
 752
 753                 if (fd1 == -1 && protocol_version < 29) {
 754                         if (fnamecmp != fname) {
 755                                 fnamecmp = fname;
 756                                 fnamecmp_type = FNAMECMP_FNAME;
 757                                 fd1 = do_open(fnamecmp, O_RDONLY, 0);
 758                         }
 759
 760                         if (fd1 == -1 && basis_dir[0]) {
 761                                 /* pre-29 allowed only one alternate basis */
 762                                 pathjoin(fnamecmpbuf, sizeof fnamecmpbuf,
 763                                          basis_dir[0], fname);
 764                                 fnamecmp = fnamecmpbuf;
 765                                 fnamecmp_type = FNAMECMP_BASIS_DIR_LOW;
 766                                 fd1 = do_open(fnamecmp, O_RDONLY, 0);
 767                         }
 768                 }
 769
 770                 one_inplace = inplace_partial && fnamecmp_type == FNAMECMP_PARTIAL_DIR;
 771                 updating_basis_or_equiv = one_inplace
 772                     || (inplace && (fnamecmp == fname || fnamecmp_type == FNAMECMP_BACKUP));
 773
 774                 if (fd1 == -1) {
 775                         st.st_mode = 0;
 776                         st.st_size = 0;
 777                 } else if (do_fstat(fd1,&st) != 0) {
 778                         rsyserr(FERROR_XFER, errno, "fstat %s failed",
 779                                 full_fname(fnamecmp));
 780                         discard_receive_data(f_in, file);
 781                         close(fd1);
 782                         if (inc_recurse)
 783                                 send_msg_int(MSG_NO_SEND, ndx);
 784                         continue;
 785                 }
 786
 787                 if (fd1 != -1 && S_ISDIR(st.st_mode) && fnamecmp == fname) {
 788                         /* this special handling for directories
 789                          * wouldn't be necessary if robust_rename()
 790                          * and the underlying robust_unlink could cope
 791                          * with directories
 792                          */
 793                         rprintf(FERROR_XFER, "recv_files: %s is a directory\n",
 794                                 full_fname(fnamecmp));
 795                         discard_receive_data(f_in, file);
 796                         close(fd1);
 797                         if (inc_recurse)
 798                                 send_msg_int(MSG_NO_SEND, ndx);
 799                         continue;
 800                 }
 801
 802                 if (fd1 != -1 && !(S_ISREG(st.st_mode) || (write_devices && IS_DEVICE(st.st_mode)))) {
 803                         close(fd1);
 804                         fd1 = -1;
 805                 }
 806
 807                 /* On Linux systems (at least), st_size is typically 0 for devices.
 808                  * If so, try to determine the actual device size. */
 809                 if (fd1 != -1 && IS_DEVICE(st.st_mode) && st.st_size == 0) {
 810                         OFF_T off = lseek(fd1, 0, SEEK_END);
 811                         if (off == (OFF_T) -1)
 812                                 rsyserr(FERROR, errno, "failed to seek to end of %s to determine size", fname);
 813                         else {
 814                                 st.st_size = off;
 815                                 off = lseek(fd1, 0, SEEK_SET);
 816                                 if (off != 0)
 817                                         rsyserr(FERROR, errno, "failed to seek back to beginning of %s to read it", fname);
 818                         }
 819                 }
 820
 821                 /* If we're not preserving permissions, change the file-list's
 822                  * mode based on the local permissions and some heuristics. */
 823                 if (!preserve_perms) {
 824                         int exists = fd1 != -1;
 825 #ifdef SUPPORT_ACLS
 826                         const char *dn = file->dirname ? file->dirname : ".";
 827                         if (parent_dirname != dn
 828                          && strcmp(parent_dirname, dn) != 0) {
 829                                 dflt_perms = default_perms_for_dir(dn);
 830                                 parent_dirname = dn;
 831                         }
 832 #endif
 833                         file->mode = dest_mode(file->mode, st.st_mode,
 834                                                dflt_perms, exists);
 835                 }
 836
 837                 /* We now check to see if we are writing the file "inplace" */
 838                 if (inplace || one_inplace)  {
 839                         fnametmp = one_inplace ? partialptr : fname;
 840                         fd2 = do_open(fnametmp, O_WRONLY|O_CREAT, 0600);
 841                         if (fd2 == -1) {
 842                                 rsyserr(FERROR_XFER, errno, "open %s failed",
 843                                         full_fname(fnametmp));
 844                         } else if (updating_basis_or_equiv)
 845                                 cleanup_set(NULL, NULL, file, fd1, fd2);
 846                 } else {
 847                         fnametmp = fnametmpbuf;
 848                         fd2 = open_tmpfile(fnametmp, fname, file);
 849                         if (fd2 != -1)
 850                                 cleanup_set(fnametmp, partialptr, file, fd1, fd2);
 851                 }
 852
 853                 if (fd2 == -1) {
 854                         discard_receive_data(f_in, file);
 855                         if (fd1 != -1)
 856                                 close(fd1);
 857                         if (inc_recurse)
 858                                 send_msg_int(MSG_NO_SEND, ndx);
 859                         continue;
 860                 }
 861
 862                 /* log the transfer */
 863                 if (log_before_transfer)
 864                         log_item(FCLIENT, file, iflags, NULL);
 865                 else if (!am_server && INFO_GTE(NAME, 1) && INFO_EQ(PROGRESS, 1))
 866                         rprintf(FINFO, "%s\n", fname);
 867
 868                 /* recv file data */
 869                 recv_ok = receive_data(f_in, fnamecmp, fd1, st.st_size, fname, fd2, file, inplace || one_inplace);
 870
 871                 log_item(log_code, file, iflags, NULL);
 872                 if (want_progress_now)
 873                         instant_progress(fname);
 874
 875                 if (fd1 != -1)
 876                         close(fd1);
 877                 if (close(fd2) < 0) {
 878                         rsyserr(FERROR, errno, "close failed on %s",
 879                                 full_fname(fnametmp));
 880                         exit_cleanup(RERR_FILEIO);
 881                 }
 882
 883                 if ((recv_ok && (!delay_updates || !partialptr)) || inplace) {
 884                         if (partialptr == fname)
 885                                 partialptr = NULL;
 886                         if (!finish_transfer(fname, fnametmp, fnamecmp,
 887                                              partialptr, file, recv_ok, 1))
 888                                 recv_ok = -1;
 889                         else if (fnamecmp == partialptr) {
 890                                 if (!one_inplace)
 891                                         do_unlink(partialptr);
 892                                 handle_partial_dir(partialptr, PDIR_DELETE);
 893                         }
 894                 } else if (keep_partial && partialptr && !one_inplace) {
 895                         if (!handle_partial_dir(partialptr, PDIR_CREATE)) {
 896                                 rprintf(FERROR,
 897                                     "Unable to create partial-dir for %s -- discarding %s.\n",
 898                                     local_name ? local_name : f_name(file, NULL),
 899                                     recv_ok ? "completed file" : "partial file");
 900                                 do_unlink(fnametmp);
 901                                 recv_ok = -1;
 902                         } else if (!finish_transfer(partialptr, fnametmp, fnamecmp, NULL,
 903                                                     file, recv_ok, !partial_dir))
 904                                 recv_ok = -1;
 905                         else if (delay_updates && recv_ok) {
 906                                 bitbag_set_bit(delayed_bits, ndx);
 907                                 recv_ok = 2;
 908                         } else
 909                                 partialptr = NULL;
 910                 } else if (!one_inplace)
 911                         do_unlink(fnametmp);
 912
 913                 cleanup_disable();
 914
 915                 if (read_batch)
 916                         file->flags |= FLAG_FILE_SENT;
 917
 918                 switch (recv_ok) {
 919                 case 2:
 920                         break;
 921                 case 1:
 922                         if (remove_source_files || inc_recurse
 923                          || (preserve_hard_links && F_IS_HLINKED(file)))
 924                                 send_msg_int(MSG_SUCCESS, ndx);
 925                         break;
 926                 case 0: {
 927                         enum logcode msgtype = redoing ? FERROR_XFER : FWARNING;
 928                         if (msgtype == FERROR_XFER || INFO_GTE(NAME, 1)) {
 929                                 char *errstr, *redostr, *keptstr;
 930                                 if (!(keep_partial && partialptr) && !inplace)
 931                                         keptstr = "discarded";
 932                                 else if (partial_dir)
 933                                         keptstr = "put into partial-dir";
 934                                 else
 935                                         keptstr = "retained";
 936                                 if (msgtype == FERROR_XFER) {
 937                                         errstr = "ERROR";
 938                                         redostr = "";
 939                                 } else {
 940                                         errstr = "WARNING";
 941                                         redostr = read_batch ? " (may try again)"
 942                                                              : " (will try again)";
 943                                 }
 944                                 rprintf(msgtype,
 945                                         "%s: %s failed verification -- update %s%s.\n",
 946                                         errstr, local_name ? f_name(file, NULL) : fname,
 947                                         keptstr, redostr);
 948                         }
 949                         if (!redoing) {
 950                                 if (read_batch)
 951                                         flist_ndx_push(&batch_redo_list, ndx);
 952                                 send_msg_int(MSG_REDO, ndx);
 953                                 file->flags |= FLAG_FILE_SENT;
 954                         } else if (inc_recurse)
 955                                 send_msg_int(MSG_NO_SEND, ndx);
 956                         break;
 957                     }
 958                 case -1:
 959                         if (inc_recurse)
 960                                 send_msg_int(MSG_NO_SEND, ndx);
 961                         break;
 962                 }
 963         }
 964         if (make_backups < 0)
 965                 make_backups = -make_backups;
 966
 967         if (phase == 2 && delay_updates) /* for protocol_version < 29 */
 968                 handle_delayed_updates(local_name);
 969
 970         if (DEBUG_GTE(RECV, 1))
 971                 rprintf(FINFO,"recv_files finished\n");
 972
 973         return 0;
 974 }