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) 2003-2019 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 allowed_lull;
  56 extern int delay_updates;
  57 extern int xfersum_type;
  58 extern mode_t orig_umask;
  59 extern struct stats stats;
  60 extern char *tmpdir;
  61 extern char *partial_dir;
  62 extern char *basis_dir[MAX_BASIS_DIRS+1];
  63 extern char sender_file_sum[MAX_DIGEST_LEN];
  64 extern struct file_list *cur_flist, *first_flist, *dir_flist;
  65 extern filter_rule_list daemon_filter_list;
  66 extern OFF_T preallocated_len;
  67
  68 static struct bitbag *delayed_bits = NULL;
  69 static int phase = 0, redoing = 0;
  70 static flist_ndx_list batch_redo_list;
  71 /* We're either updating the basis file or an identical copy: */
  72 static int updating_basis_or_equiv;
  73
  74 #define TMPNAME_SUFFIX ".XXXXXX"
  75 #define TMPNAME_SUFFIX_LEN ((int)sizeof TMPNAME_SUFFIX - 1)
  76 #define MAX_UNIQUE_NUMBER 999999
  77 #define MAX_UNIQUE_LOOP 100
  78
  79 /* get_tmpname() - create a tmp filename for a given filename
  80  *
  81  * If a tmpdir is defined, use that as the directory to put it in.  Otherwise,
  82  * the tmp filename is in the same directory as the given name.  Note that
  83  * there may be no directory at all in the given name!
  84  *
  85  * The tmp filename is basically the given filename with a dot prepended, and
  86  * .XXXXXX appended (for mkstemp() to put its unique gunk in).  We take care
  87  * to not exceed either the MAXPATHLEN or NAME_MAX, especially the last, as
  88  * the basename basically becomes 8 characters longer.  In such a case, the
  89  * original name is shortened sufficiently to make it all fit.
  90  *
  91  * If the make_unique arg is True, the XXXXXX string is replaced with a unique
  92  * string that doesn't exist at the time of the check.  This is intended to be
  93  * used for creating hard links, symlinks, devices, and special files, since
  94  * normal files should be handled by mkstemp() for safety.
  95  *
  96  * Of course, the only reason the file is based on the original name is to
  97  * make it easier to figure out what purpose a temp file is serving when a
  98  * transfer is in progress. */
  99 int get_tmpname(char *fnametmp, const char *fname, BOOL make_unique)
 100 {
 101         int maxname, length = 0;
 102         const char *f;
 103         char *suf;
 104
 105         if (tmpdir) {
 106                 /* Note: this can't overflow, so the return value is safe */
 107                 length = strlcpy(fnametmp, tmpdir, MAXPATHLEN - 2);
 108                 fnametmp[length++] = '/';
 109         }
 110
 111         if ((f = strrchr(fname, '/')) != NULL) {
 112                 ++f;
 113                 if (!tmpdir) {
 114                         length = f - fname;
 115                         /* copy up to and including the slash */
 116                         strlcpy(fnametmp, fname, length + 1);
 117                 }
 118         } else
 119                 f = fname;
 120
 121         if (!tmpdir) { /* using a tmpdir avoids the leading dot on our temp names */
 122                 if (*f == '.') /* avoid an extra leading dot for OS X's sake */
 123                         f++;
 124                 fnametmp[length++] = '.';
 125         }
 126
 127         /* The maxname value is bufsize, and includes space for the '\0'.
 128          * NAME_MAX needs an extra -1 for the name's leading dot. */
 129         maxname = MIN(MAXPATHLEN - length - TMPNAME_SUFFIX_LEN,
 130                       NAME_MAX - 1 - TMPNAME_SUFFIX_LEN);
 131
 132         if (maxname < 0) {
 133                 rprintf(FERROR_XFER, "temporary filename too long: %s\n", fname);
 134                 fnametmp[0] = '\0';
 135                 return 0;
 136         }
 137
 138         if (maxname) {
 139                 int added = strlcpy(fnametmp + length, f, maxname);
 140                 if (added >= maxname)
 141                         added = maxname - 1;
 142                 suf = fnametmp + length + added;
 143
 144                 /* Trim any dangling high-bit chars if the first-trimmed char (if any) is
 145                  * also a high-bit char, just in case we cut into a multi-byte sequence.
 146                  * We are guaranteed to stop because of the leading '.' we added. */
 147                 if ((int)f[added] & 0x80) {
 148                         while ((int)suf[-1] & 0x80)
 149                                 suf--;
 150                 }
 151                 /* trim one trailing dot before our suffix's dot */
 152                 if (suf[-1] == '.')
 153                         suf--;
 154         } else
 155                 suf = fnametmp + length - 1; /* overwrite the leading dot with suffix's dot */
 156
 157         if (make_unique) {
 158                 static unsigned counter_limit;
 159                 unsigned counter;
 160
 161                 if (!counter_limit) {
 162                         counter_limit = (unsigned)getpid() + MAX_UNIQUE_LOOP;
 163                         if (counter_limit > MAX_UNIQUE_NUMBER || counter_limit < MAX_UNIQUE_LOOP)
 164                                 counter_limit = MAX_UNIQUE_LOOP;
 165                 }
 166                 counter = counter_limit - MAX_UNIQUE_LOOP;
 167
 168                 /* This doesn't have to be very good because we don't need
 169                  * to worry about someone trying to guess the values:  all
 170                  * a conflict will do is cause a device, special file, hard
 171                  * link, or symlink to fail to be created.  Also: avoid
 172                  * using mktemp() due to gcc's annoying warning. */
 173                 while (1) {
 174                         snprintf(suf, TMPNAME_SUFFIX_LEN+1, ".%d", counter);
 175                         if (access(fnametmp, 0) < 0)
 176                                 break;
 177                         if (++counter >= counter_limit)
 178                                 return 0;
 179                 }
 180         } else
 181                 memcpy(suf, TMPNAME_SUFFIX, TMPNAME_SUFFIX_LEN+1);
 182
 183         return 1;
 184 }
 185
 186 /* Opens a temporary file for writing.
 187  * Success: Writes name into fnametmp, returns fd.
 188  * Failure: Clobbers fnametmp, returns -1.
 189  * Calling cleanup_set() is the caller's job. */
 190 int open_tmpfile(char *fnametmp, const char *fname, struct file_struct *file)
 191 {
 192         int fd;
 193         mode_t added_perms;
 194
 195         if (!get_tmpname(fnametmp, fname, False))
 196                 return -1;
 197
 198         if (am_root < 0) {
 199                 /* For --fake-super, the file must be useable by the copying
 200                  * user, just like it would be for root. */
 201                 added_perms = S_IRUSR|S_IWUSR;
 202         } else {
 203                 /* For a normal copy, we need to be able to tweak things like xattrs. */
 204                 added_perms = S_IWUSR;
 205         }
 206
 207         /* We initially set the perms without the setuid/setgid bits or group
 208          * access to ensure that there is no race condition.  They will be
 209          * correctly updated after the right owner and group info is set.
 210          * (Thanks to snabb@epipe.fi for pointing this out.) */
 211         fd = do_mkstemp(fnametmp, (file->mode|added_perms) & INITACCESSPERMS);
 212
 213 #if 0
 214         /* In most cases parent directories will already exist because their
 215          * information should have been previously transferred, but that may
 216          * not be the case with -R */
 217         if (fd == -1 && relative_paths && errno == ENOENT
 218          && make_path(fnametmp, MKP_SKIP_SLASH | MKP_DROP_NAME) == 0) {
 219                 /* Get back to name with XXXXXX in it. */
 220                 get_tmpname(fnametmp, fname, False);
 221                 fd = do_mkstemp(fnametmp, (file->mode|added_perms) & INITACCESSPERMS);
 222         }
 223 #endif
 224
 225         if (fd == -1) {
 226                 rsyserr(FERROR_XFER, errno, "mkstemp %s failed",
 227                         full_fname(fnametmp));
 228                 return -1;
 229         }
 230
 231         return fd;
 232 }
 233
 234 static int receive_data(int f_in, char *fname_r, int fd_r, OFF_T size_r,
 235                         const char *fname, int fd, struct file_struct *file)
 236 {
 237         static char file_sum1[MAX_DIGEST_LEN];
 238         struct map_struct *mapbuf;
 239         struct sum_struct sum;
 240         int sum_len;
 241         int32 len;
 242         OFF_T total_size = F_LENGTH(file);
 243         OFF_T offset = 0;
 244         OFF_T offset2;
 245         char *data;
 246         int32 i;
 247         char *map = NULL;
 248
 249 #ifdef SUPPORT_PREALLOCATION
 250         if (preallocate_files && fd != -1 && total_size > 0 && (!inplace || total_size > size_r)) {
 251                 /* Try to preallocate enough space for file's eventual length.  Can
 252                  * reduce fragmentation on filesystems like ext4, xfs, and NTFS. */
 253                 if ((preallocated_len = do_fallocate(fd, 0, total_size)) < 0)
 254                         rsyserr(FWARNING, errno, "do_fallocate %s", full_fname(fname));
 255         } else
 256 #endif
 257         if (inplace) {
 258 #ifdef HAVE_FTRUNCATE
 259                 /* The most compatible way to create a sparse file is to start with no length. */
 260                 if (sparse_files > 0 && whole_file && fd >= 0 && do_ftruncate(fd, 0) == 0)
 261                         preallocated_len = 0;
 262                 else
 263 #endif
 264                         preallocated_len = size_r;
 265         } else
 266                 preallocated_len = 0;
 267
 268         read_sum_head(f_in, &sum);
 269
 270         if (fd_r >= 0 && size_r > 0) {
 271                 int32 read_size = MAX(sum.blength * 2, 16*1024);
 272                 mapbuf = map_file(fd_r, size_r, read_size, sum.blength);
 273                 if (DEBUG_GTE(DELTASUM, 2)) {
 274                         rprintf(FINFO, "recv mapped %s of size %s\n",
 275                                 fname_r, big_num(size_r));
 276                 }
 277         } else
 278                 mapbuf = NULL;
 279
 280         sum_init(xfersum_type, checksum_seed);
 281
 282         if (append_mode > 0) {
 283                 OFF_T j;
 284                 sum.flength = (OFF_T)sum.count * sum.blength;
 285                 if (sum.remainder)
 286                         sum.flength -= sum.blength - sum.remainder;
 287                 if (append_mode == 2 && mapbuf) {
 288                         for (j = CHUNK_SIZE; j < sum.flength; j += CHUNK_SIZE) {
 289                                 if (INFO_GTE(PROGRESS, 1))
 290                                         show_progress(offset, total_size);
 291                                 sum_update(map_ptr(mapbuf, offset, CHUNK_SIZE),
 292                                            CHUNK_SIZE);
 293                                 offset = j;
 294                         }
 295                         if (offset < sum.flength) {
 296                                 int32 len = (int32)(sum.flength - offset);
 297                                 if (INFO_GTE(PROGRESS, 1))
 298                                         show_progress(offset, total_size);
 299                                 sum_update(map_ptr(mapbuf, offset, len), len);
 300                         }
 301                 }
 302                 offset = sum.flength;
 303                 if (fd != -1 && (j = do_lseek(fd, offset, SEEK_SET)) != offset) {
 304                         rsyserr(FERROR_XFER, errno, "lseek of %s returned %s, not %s",
 305                                 full_fname(fname), big_num(j), big_num(offset));
 306                         exit_cleanup(RERR_FILEIO);
 307                 }
 308         }
 309
 310         while ((i = recv_token(f_in, &data)) != 0) {
 311                 if (INFO_GTE(PROGRESS, 1))
 312                         show_progress(offset, total_size);
 313
 314                 if (allowed_lull)
 315                         maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH | MSK_ACTIVE_RECEIVER);
 316
 317                 if (i > 0) {
 318                         if (DEBUG_GTE(DELTASUM, 3)) {
 319                                 rprintf(FINFO,"data recv %d at %s\n",
 320                                         i, big_num(offset));
 321                         }
 322
 323                         stats.literal_data += i;
 324                         cleanup_got_literal = 1;
 325
 326                         sum_update(data, i);
 327
 328                         if (fd != -1 && write_file(fd, 0, offset, data, i) != i)
 329                                 goto report_write_error;
 330                         offset += i;
 331                         continue;
 332                 }
 333
 334                 i = -(i+1);
 335                 offset2 = i * (OFF_T)sum.blength;
 336                 len = sum.blength;
 337                 if (i == (int)sum.count-1 && sum.remainder != 0)
 338                         len = sum.remainder;
 339
 340                 stats.matched_data += len;
 341
 342                 if (DEBUG_GTE(DELTASUM, 3)) {
 343                         rprintf(FINFO,
 344                                 "chunk[%d] of size %ld at %s offset=%s%s\n",
 345                                 i, (long)len, big_num(offset2), big_num(offset),
 346                                 updating_basis_or_equiv && offset == offset2 ? " (seek)" : "");
 347                 }
 348
 349                 if (mapbuf) {
 350                         map = map_ptr(mapbuf,offset2,len);
 351
 352                         see_token(map, len);
 353                         sum_update(map, len);
 354                 }
 355
 356                 if (updating_basis_or_equiv) {
 357                         if (offset == offset2 && fd != -1) {
 358                                 if (skip_matched(fd, offset, map, len) < 0)
 359                                         goto report_write_error;
 360                                 offset += len;
 361                                 continue;
 362                         }
 363                 }
 364                 if (fd != -1 && map && write_file(fd, 0, offset, map, len) != (int)len)
 365                         goto report_write_error;
 366                 offset += len;
 367         }
 368
 369         if (fd != -1 && offset > 0) {
 370                 if (sparse_files > 0) {
 371                         if (sparse_end(fd, offset) != 0)
 372                                 goto report_write_error;
 373                 } else if (flush_write_file(fd) < 0) {
 374                     report_write_error:
 375                         rsyserr(FERROR_XFER, errno, "write failed on %s", full_fname(fname));
 376                         exit_cleanup(RERR_FILEIO);
 377                 }
 378         }
 379
 380 #ifdef HAVE_FTRUNCATE
 381         /* inplace: New data could be shorter than old data.
 382          * preallocate_files: total_size could have been an overestimate.
 383          *     Cut off any extra preallocated zeros from dest file. */
 384         if ((inplace || preallocated_len > offset) && fd != -1 && !IS_DEVICE(file->mode) && do_ftruncate(fd, offset) < 0) {
 385                 rsyserr(FERROR_XFER, errno, "ftruncate failed on %s",
 386                         full_fname(fname));
 387         }
 388 #endif
 389
 390         if (INFO_GTE(PROGRESS, 1))
 391                 end_progress(total_size);
 392
 393         sum_len = sum_end(file_sum1);
 394
 395         if (mapbuf)
 396                 unmap_file(mapbuf);
 397
 398         read_buf(f_in, sender_file_sum, sum_len);
 399         if (DEBUG_GTE(DELTASUM, 2))
 400                 rprintf(FINFO,"got file_sum\n");
 401         if (fd != -1 && memcmp(file_sum1, sender_file_sum, sum_len) != 0)
 402                 return 0;
 403         return 1;
 404 }
 405
 406
 407 static void discard_receive_data(int f_in, struct file_struct *file)
 408 {
 409         receive_data(f_in, NULL, -1, 0, NULL, -1, file);
 410 }
 411
 412 static void handle_delayed_updates(char *local_name)
 413 {
 414         char *fname, *partialptr;
 415         int ndx;
 416
 417         for (ndx = -1; (ndx = bitbag_next_bit(delayed_bits, ndx)) >= 0; ) {
 418                 struct file_struct *file = cur_flist->files[ndx];
 419                 fname = local_name ? local_name : f_name(file, NULL);
 420                 if ((partialptr = partial_dir_fname(fname)) != NULL) {
 421                         if (make_backups > 0 && !make_backup(fname, False))
 422                                 continue;
 423                         if (DEBUG_GTE(RECV, 1)) {
 424                                 rprintf(FINFO, "renaming %s to %s\n",
 425                                         partialptr, fname);
 426                         }
 427                         /* We don't use robust_rename() here because the
 428                          * partial-dir must be on the same drive. */
 429                         if (do_rename(partialptr, fname) < 0) {
 430                                 rsyserr(FERROR_XFER, errno,
 431                                         "rename failed for %s (from %s)",
 432                                         full_fname(fname), partialptr);
 433                         } else {
 434                                 if (remove_source_files
 435                                  || (preserve_hard_links && F_IS_HLINKED(file)))
 436                                         send_msg_int(MSG_SUCCESS, ndx);
 437                                 handle_partial_dir(partialptr, PDIR_DELETE);
 438                         }
 439                 }
 440         }
 441 }
 442
 443 static void no_batched_update(int ndx, BOOL is_redo)
 444 {
 445         struct file_list *flist = flist_for_ndx(ndx, "no_batched_update");
 446         struct file_struct *file = flist->files[ndx - flist->ndx_start];
 447
 448         rprintf(FERROR_XFER, "(No batched update for%s \"%s\")\n",
 449                 is_redo ? " resend of" : "", f_name(file, NULL));
 450
 451         if (inc_recurse && !dry_run)
 452                 send_msg_int(MSG_NO_SEND, ndx);
 453 }
 454
 455 static int we_want_redo(int desired_ndx)
 456 {
 457         static int redo_ndx = -1;
 458
 459         while (redo_ndx < desired_ndx) {
 460                 if (redo_ndx >= 0)
 461                         no_batched_update(redo_ndx, True);
 462                 if ((redo_ndx = flist_ndx_pop(&batch_redo_list)) < 0)
 463                         return 0;
 464         }
 465
 466         if (redo_ndx == desired_ndx) {
 467                 redo_ndx = -1;
 468                 return 1;
 469         }
 470
 471         return 0;
 472 }
 473
 474 static int gen_wants_ndx(int desired_ndx, int flist_num)
 475 {
 476         static int next_ndx = -1;
 477         static int done_cnt = 0;
 478         static BOOL got_eof = False;
 479
 480         if (got_eof)
 481                 return 0;
 482
 483         /* TODO: integrate gen-reading I/O into perform_io() so this is not needed? */
 484         io_flush(FULL_FLUSH);
 485
 486         while (next_ndx < desired_ndx) {
 487                 if (inc_recurse && flist_num <= done_cnt)
 488                         return 0;
 489                 if (next_ndx >= 0)
 490                         no_batched_update(next_ndx, False);
 491                 if ((next_ndx = read_int(batch_gen_fd)) < 0) {
 492                         if (inc_recurse) {
 493                                 done_cnt++;
 494                                 continue;
 495                         }
 496                         got_eof = True;
 497                         return 0;
 498                 }
 499         }
 500
 501         if (next_ndx == desired_ndx) {
 502                 next_ndx = -1;
 503                 return 1;
 504         }
 505
 506         return 0;
 507 }
 508
 509 /**
 510  * main routine for receiver process.
 511  *
 512  * Receiver process runs on the same host as the generator process. */
 513 int recv_files(int f_in, int f_out, char *local_name)
 514 {
 515         int fd1,fd2;
 516         STRUCT_STAT st;
 517         int iflags, xlen;
 518         char *fname, fbuf[MAXPATHLEN];
 519         char xname[MAXPATHLEN];
 520         char fnametmp[MAXPATHLEN];
 521         char *fnamecmp, *partialptr;
 522         char fnamecmpbuf[MAXPATHLEN];
 523         uchar fnamecmp_type;
 524         struct file_struct *file;
 525         int itemizing = am_server ? logfile_format_has_i : stdout_format_has_i;
 526         enum logcode log_code = log_before_transfer ? FLOG : FINFO;
 527         int max_phase = protocol_version >= 29 ? 2 : 1;
 528         int dflt_perms = (ACCESSPERMS & ~orig_umask);
 529 #ifdef SUPPORT_ACLS
 530         const char *parent_dirname = "";
 531 #endif
 532         int ndx, recv_ok;
 533
 534         if (DEBUG_GTE(RECV, 1))
 535                 rprintf(FINFO, "recv_files(%d) starting\n", cur_flist->used);
 536
 537         if (delay_updates)
 538                 delayed_bits = bitbag_create(cur_flist->used + 1);
 539
 540         while (1) {
 541                 cleanup_disable();
 542
 543                 /* This call also sets cur_flist. */
 544                 ndx = read_ndx_and_attrs(f_in, f_out, &iflags, &fnamecmp_type,
 545                                          xname, &xlen);
 546                 if (ndx == NDX_DONE) {
 547                         if (!am_server && INFO_GTE(PROGRESS, 2) && cur_flist) {
 548                                 set_current_file_index(NULL, 0);
 549                                 end_progress(0);
 550                         }
 551                         if (inc_recurse && first_flist) {
 552                                 if (read_batch) {
 553                                         ndx = first_flist->used + first_flist->ndx_start;
 554                                         gen_wants_ndx(ndx, first_flist->flist_num);
 555                                 }
 556                                 flist_free(first_flist);
 557                                 if (first_flist)
 558                                         continue;
 559                         } else if (read_batch && first_flist) {
 560                                 ndx = first_flist->used;
 561                                 gen_wants_ndx(ndx, first_flist->flist_num);
 562                         }
 563                         if (++phase > max_phase)
 564                                 break;
 565                         if (DEBUG_GTE(RECV, 1))
 566                                 rprintf(FINFO, "recv_files phase=%d\n", phase);
 567                         if (phase == 2 && delay_updates)
 568                                 handle_delayed_updates(local_name);
 569                         write_int(f_out, NDX_DONE);
 570                         continue;
 571                 }
 572
 573                 if (ndx - cur_flist->ndx_start >= 0)
 574                         file = cur_flist->files[ndx - cur_flist->ndx_start];
 575                 else
 576                         file = dir_flist->files[cur_flist->parent_ndx];
 577                 fname = local_name ? local_name : f_name(file, fbuf);
 578
 579                 if (DEBUG_GTE(RECV, 1))
 580                         rprintf(FINFO, "recv_files(%s)\n", fname);
 581
 582                 if (daemon_filter_list.head && (*fname != '.' || fname[1] != '\0')
 583                  && check_filter(&daemon_filter_list, FLOG, fname, 0) < 0) {
 584                         rprintf(FERROR, "attempt to hack rsync failed.\n");
 585                         exit_cleanup(RERR_PROTOCOL);
 586                 }
 587
 588 #ifdef SUPPORT_XATTRS
 589                 if (preserve_xattrs && iflags & ITEM_REPORT_XATTR && do_xfers
 590                  && !(want_xattr_optim && BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE)))
 591                         recv_xattr_request(file, f_in);
 592 #endif
 593
 594                 if (!(iflags & ITEM_TRANSFER)) {
 595                         maybe_log_item(file, iflags, itemizing, xname);
 596 #ifdef SUPPORT_XATTRS
 597                         if (preserve_xattrs && iflags & ITEM_REPORT_XATTR && do_xfers
 598                          && !BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE))
 599                                 set_file_attrs(fname, file, NULL, fname, 0);
 600 #endif
 601                         if (iflags & ITEM_IS_NEW) {
 602                                 stats.created_files++;
 603                                 if (S_ISREG(file->mode)) {
 604                                         /* Nothing further to count. */
 605                                 } else if (S_ISDIR(file->mode))
 606                                         stats.created_dirs++;
 607 #ifdef SUPPORT_LINKS
 608                                 else if (S_ISLNK(file->mode))
 609                                         stats.created_symlinks++;
 610 #endif
 611                                 else if (IS_DEVICE(file->mode))
 612                                         stats.created_devices++;
 613                                 else
 614                                         stats.created_specials++;
 615                         }
 616                         continue;
 617                 }
 618                 if (phase == 2) {
 619                         rprintf(FERROR,
 620                                 "got transfer request in phase 2 [%s]\n",
 621                                 who_am_i());
 622                         exit_cleanup(RERR_PROTOCOL);
 623                 }
 624
 625                 if (file->flags & FLAG_FILE_SENT) {
 626                         if (csum_length == SHORT_SUM_LENGTH) {
 627                                 if (keep_partial && !partial_dir)
 628                                         make_backups = -make_backups; /* prevents double backup */
 629                                 if (append_mode)
 630                                         sparse_files = -sparse_files;
 631                                 append_mode = -append_mode;
 632                                 csum_length = SUM_LENGTH;
 633                                 redoing = 1;
 634                         }
 635                 } else {
 636                         if (csum_length != SHORT_SUM_LENGTH) {
 637                                 if (keep_partial && !partial_dir)
 638                                         make_backups = -make_backups;
 639                                 if (append_mode)
 640                                         sparse_files = -sparse_files;
 641                                 append_mode = -append_mode;
 642                                 csum_length = SHORT_SUM_LENGTH;
 643                                 redoing = 0;
 644                         }
 645                         if (iflags & ITEM_IS_NEW)
 646                                 stats.created_files++;
 647                 }
 648
 649                 if (!am_server && INFO_GTE(PROGRESS, 1))
 650                         set_current_file_index(file, ndx);
 651                 stats.xferred_files++;
 652                 stats.total_transferred_size += F_LENGTH(file);
 653
 654                 cleanup_got_literal = 0;
 655
 656                 if (read_batch) {
 657                         int wanted = redoing
 658                                    ? we_want_redo(ndx)
 659                                    : gen_wants_ndx(ndx, cur_flist->flist_num);
 660                         if (!wanted) {
 661                                 rprintf(FINFO,
 662                                         "(Skipping batched update for%s \"%s\")\n",
 663                                         redoing ? " resend of" : "",
 664                                         fname);
 665                                 discard_receive_data(f_in, file);
 666                                 file->flags |= FLAG_FILE_SENT;
 667                                 continue;
 668                         }
 669                 }
 670
 671                 remember_initial_stats();
 672
 673                 if (!do_xfers) { /* log the transfer */
 674                         log_item(FCLIENT, file, iflags, NULL);
 675                         if (read_batch)
 676                                 discard_receive_data(f_in, file);
 677                         continue;
 678                 }
 679                 if (write_batch < 0) {
 680                         log_item(FCLIENT, file, iflags, NULL);
 681                         if (!am_server)
 682                                 discard_receive_data(f_in, file);
 683                         if (inc_recurse)
 684                                 send_msg_int(MSG_SUCCESS, ndx);
 685                         continue;
 686                 }
 687
 688                 partialptr = partial_dir ? partial_dir_fname(fname) : fname;
 689
 690                 if (protocol_version >= 29) {
 691                         switch (fnamecmp_type) {
 692                         case FNAMECMP_FNAME:
 693                                 fnamecmp = fname;
 694                                 break;
 695                         case FNAMECMP_PARTIAL_DIR:
 696                                 fnamecmp = partialptr;
 697                                 break;
 698                         case FNAMECMP_BACKUP:
 699                                 fnamecmp = get_backup_name(fname);
 700                                 break;
 701                         case FNAMECMP_FUZZY:
 702                                 if (file->dirname) {
 703                                         pathjoin(fnamecmpbuf, sizeof fnamecmpbuf, file->dirname, xname);
 704                                         fnamecmp = fnamecmpbuf;
 705                                 } else
 706                                         fnamecmp = xname;
 707                                 break;
 708                         default:
 709                                 if (fnamecmp_type > FNAMECMP_FUZZY && fnamecmp_type-FNAMECMP_FUZZY <= basis_dir_cnt) {
 710                                         fnamecmp_type -= FNAMECMP_FUZZY + 1;
 711                                         if (file->dirname) {
 712                                                 stringjoin(fnamecmpbuf, sizeof fnamecmpbuf,
 713                                                            basis_dir[fnamecmp_type], "/", file->dirname, "/", xname, NULL);
 714                                         } else
 715                                                 pathjoin(fnamecmpbuf, sizeof fnamecmpbuf, basis_dir[fnamecmp_type], xname);
 716                                 } else if (fnamecmp_type >= basis_dir_cnt) {
 717                                         rprintf(FERROR,
 718                                                 "invalid basis_dir index: %d.\n",
 719                                                 fnamecmp_type);
 720                                         exit_cleanup(RERR_PROTOCOL);
 721                                 } else
 722                                         pathjoin(fnamecmpbuf, sizeof fnamecmpbuf, basis_dir[fnamecmp_type], fname);
 723                                 fnamecmp = fnamecmpbuf;
 724                                 break;
 725                         }
 726                         if (!fnamecmp || (daemon_filter_list.head
 727                           && check_filter(&daemon_filter_list, FLOG, fnamecmp, 0) < 0)) {
 728                                 fnamecmp = fname;
 729                                 fnamecmp_type = FNAMECMP_FNAME;
 730                         }
 731                 } else {
 732                         /* Reminder: --inplace && --partial-dir are never
 733                          * enabled at the same time. */
 734                         if (inplace && make_backups > 0) {
 735                                 if (!(fnamecmp = get_backup_name(fname)))
 736                                         fnamecmp = fname;
 737                                 else
 738                                         fnamecmp_type = FNAMECMP_BACKUP;
 739                         } else if (partial_dir && partialptr)
 740                                 fnamecmp = partialptr;
 741                         else
 742                                 fnamecmp = fname;
 743                 }
 744
 745                 /* open the file */
 746                 fd1 = do_open(fnamecmp, O_RDONLY, 0);
 747
 748                 if (fd1 == -1 && protocol_version < 29) {
 749                         if (fnamecmp != fname) {
 750                                 fnamecmp = fname;
 751                                 fd1 = do_open(fnamecmp, O_RDONLY, 0);
 752                         }
 753
 754                         if (fd1 == -1 && basis_dir[0]) {
 755                                 /* pre-29 allowed only one alternate basis */
 756                                 pathjoin(fnamecmpbuf, sizeof fnamecmpbuf,
 757                                          basis_dir[0], fname);
 758                                 fnamecmp = fnamecmpbuf;
 759                                 fd1 = do_open(fnamecmp, O_RDONLY, 0);
 760                         }
 761                 }
 762
 763                 updating_basis_or_equiv = inplace
 764                     && (fnamecmp == fname || fnamecmp_type == FNAMECMP_BACKUP);
 765
 766                 if (fd1 == -1) {
 767                         st.st_mode = 0;
 768                         st.st_size = 0;
 769                 } else if (do_fstat(fd1,&st) != 0) {
 770                         rsyserr(FERROR_XFER, errno, "fstat %s failed",
 771                                 full_fname(fnamecmp));
 772                         discard_receive_data(f_in, file);
 773                         close(fd1);
 774                         if (inc_recurse)
 775                                 send_msg_int(MSG_NO_SEND, ndx);
 776                         continue;
 777                 }
 778
 779                 if (fd1 != -1 && S_ISDIR(st.st_mode) && fnamecmp == fname) {
 780                         /* this special handling for directories
 781                          * wouldn't be necessary if robust_rename()
 782                          * and the underlying robust_unlink could cope
 783                          * with directories
 784                          */
 785                         rprintf(FERROR_XFER, "recv_files: %s is a directory\n",
 786                                 full_fname(fnamecmp));
 787                         discard_receive_data(f_in, file);
 788                         close(fd1);
 789                         if (inc_recurse)
 790                                 send_msg_int(MSG_NO_SEND, ndx);
 791                         continue;
 792                 }
 793
 794                 if (fd1 != -1 && !(S_ISREG(st.st_mode) || (write_devices && IS_DEVICE(st.st_mode)))) {
 795                         close(fd1);
 796                         fd1 = -1;
 797                 }
 798
 799                 /* On Linux systems (at least), st_size is typically 0 for devices.
 800                  * If so, try to determine the actual device size. */
 801                 if (fd1 != -1 && IS_DEVICE(st.st_mode) && st.st_size == 0) {
 802                         OFF_T off = lseek(fd1, 0, SEEK_END);
 803                         if (off == (OFF_T) -1)
 804                                 rsyserr(FERROR, errno, "failed to seek to end of %s to determine size", fname);
 805                         else {
 806                                 st.st_size = off;
 807                                 off = lseek(fd1, 0, SEEK_SET);
 808                                 if (off != 0)
 809                                         rsyserr(FERROR, errno, "failed to seek back to beginning of %s to read it", fname);
 810                         }
 811                 }
 812
 813                 /* If we're not preserving permissions, change the file-list's
 814                  * mode based on the local permissions and some heuristics. */
 815                 if (!preserve_perms) {
 816                         int exists = fd1 != -1;
 817 #ifdef SUPPORT_ACLS
 818                         const char *dn = file->dirname ? file->dirname : ".";
 819                         if (parent_dirname != dn
 820                          && strcmp(parent_dirname, dn) != 0) {
 821                                 dflt_perms = default_perms_for_dir(dn);
 822                                 parent_dirname = dn;
 823                         }
 824 #endif
 825                         file->mode = dest_mode(file->mode, st.st_mode,
 826                                                dflt_perms, exists);
 827                 }
 828
 829                 /* We now check to see if we are writing the file "inplace" */
 830                 if (inplace)  {
 831                         fd2 = do_open(fname, O_WRONLY|O_CREAT, 0600);
 832                         if (fd2 == -1) {
 833                                 rsyserr(FERROR_XFER, errno, "open %s failed",
 834                                         full_fname(fname));
 835                         } else if (updating_basis_or_equiv)
 836                                 cleanup_set(NULL, NULL, file, fd1, fd2);
 837                 } else {
 838                         fd2 = open_tmpfile(fnametmp, fname, file);
 839                         if (fd2 != -1)
 840                                 cleanup_set(fnametmp, partialptr, file, fd1, fd2);
 841                 }
 842
 843                 if (fd2 == -1) {
 844                         discard_receive_data(f_in, file);
 845                         if (fd1 != -1)
 846                                 close(fd1);
 847                         if (inc_recurse)
 848                                 send_msg_int(MSG_NO_SEND, ndx);
 849                         continue;
 850                 }
 851
 852                 /* log the transfer */
 853                 if (log_before_transfer)
 854                         log_item(FCLIENT, file, iflags, NULL);
 855                 else if (!am_server && INFO_GTE(NAME, 1) && INFO_EQ(PROGRESS, 1))
 856                         rprintf(FINFO, "%s\n", fname);
 857
 858                 /* recv file data */
 859                 recv_ok = receive_data(f_in, fnamecmp, fd1, st.st_size, fname, fd2, file);
 860
 861                 log_item(log_code, file, iflags, NULL);
 862
 863                 if (fd1 != -1)
 864                         close(fd1);
 865                 if (close(fd2) < 0) {
 866                         rsyserr(FERROR, errno, "close failed on %s",
 867                                 full_fname(fnametmp));
 868                         exit_cleanup(RERR_FILEIO);
 869                 }
 870
 871                 if ((recv_ok && (!delay_updates || !partialptr)) || inplace) {
 872                         if (partialptr == fname)
 873                                 partialptr = NULL;
 874                         if (!finish_transfer(fname, fnametmp, fnamecmp,
 875                                              partialptr, file, recv_ok, 1))
 876                                 recv_ok = -1;
 877                         else if (fnamecmp == partialptr) {
 878                                 do_unlink(partialptr);
 879                                 handle_partial_dir(partialptr, PDIR_DELETE);
 880                         }
 881                 } else if (keep_partial && partialptr) {
 882                         if (!handle_partial_dir(partialptr, PDIR_CREATE)) {
 883                                 rprintf(FERROR,
 884                                     "Unable to create partial-dir for %s -- discarding %s.\n",
 885                                     local_name ? local_name : f_name(file, NULL),
 886                                     recv_ok ? "completed file" : "partial file");
 887                                 do_unlink(fnametmp);
 888                                 recv_ok = -1;
 889                         } else if (!finish_transfer(partialptr, fnametmp, fnamecmp, NULL,
 890                                                     file, recv_ok, !partial_dir))
 891                                 recv_ok = -1;
 892                         else if (delay_updates && recv_ok) {
 893                                 bitbag_set_bit(delayed_bits, ndx);
 894                                 recv_ok = 2;
 895                         } else
 896                                 partialptr = NULL;
 897                 } else
 898                         do_unlink(fnametmp);
 899
 900                 cleanup_disable();
 901
 902                 if (read_batch)
 903                         file->flags |= FLAG_FILE_SENT;
 904
 905                 switch (recv_ok) {
 906                 case 2:
 907                         break;
 908                 case 1:
 909                         if (remove_source_files || inc_recurse
 910                          || (preserve_hard_links && F_IS_HLINKED(file)))
 911                                 send_msg_int(MSG_SUCCESS, ndx);
 912                         break;
 913                 case 0: {
 914                         enum logcode msgtype = redoing ? FERROR_XFER : FWARNING;
 915                         if (msgtype == FERROR_XFER || INFO_GTE(NAME, 1)) {
 916                                 char *errstr, *redostr, *keptstr;
 917                                 if (!(keep_partial && partialptr) && !inplace)
 918                                         keptstr = "discarded";
 919                                 else if (partial_dir)
 920                                         keptstr = "put into partial-dir";
 921                                 else
 922                                         keptstr = "retained";
 923                                 if (msgtype == FERROR_XFER) {
 924                                         errstr = "ERROR";
 925                                         redostr = "";
 926                                 } else {
 927                                         errstr = "WARNING";
 928                                         redostr = read_batch ? " (may try again)"
 929                                                              : " (will try again)";
 930                                 }
 931                                 rprintf(msgtype,
 932                                         "%s: %s failed verification -- update %s%s.\n",
 933                                         errstr, local_name ? f_name(file, NULL) : fname,
 934                                         keptstr, redostr);
 935                         }
 936                         if (!redoing) {
 937                                 if (read_batch)
 938                                         flist_ndx_push(&batch_redo_list, ndx);
 939                                 send_msg_int(MSG_REDO, ndx);
 940                                 file->flags |= FLAG_FILE_SENT;
 941                         } else if (inc_recurse)
 942                                 send_msg_int(MSG_NO_SEND, ndx);
 943                         break;
 944                     }
 945                 case -1:
 946                         if (inc_recurse)
 947                                 send_msg_int(MSG_NO_SEND, ndx);
 948                         break;
 949                 }
 950         }
 951         if (make_backups < 0)
 952                 make_backups = -make_backups;
 953
 954         if (phase == 2 && delay_updates) /* for protocol_version < 29 */
 955                 handle_delayed_updates(local_name);
 956
 957         if (DEBUG_GTE(RECV, 1))
 958                 rprintf(FINFO,"recv_files finished\n");
 959
 960         return 0;
 961 }