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