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) 2003-2014 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 preserve_xattrs;
  43 extern int basis_dir_cnt;
  44 extern int make_backups;
  45 extern int cleanup_got_literal;
  46 extern int remove_source_files;
  47 extern int append_mode;
  48 extern int sparse_files;
  49 extern int preallocate_files;
  50 extern int keep_partial;
  51 extern int checksum_len;
  52 extern int checksum_seed;
  53 extern int inplace;
  54 extern int allowed_lull;
  55 extern int delay_updates;
  56 extern mode_t orig_umask;
  57 extern struct stats stats;
  58 extern char *tmpdir;
  59 extern char *partial_dir;
  60 extern char *basis_dir[MAX_BASIS_DIRS+1];
  61 extern char sender_file_sum[MAX_DIGEST_LEN];
  62 extern struct file_list *cur_flist, *first_flist, *dir_flist;
  63 extern filter_rule_list daemon_filter_list;
  64
  65 static struct bitbag *delayed_bits = NULL;
  66 static int phase = 0, redoing = 0;
  67 static flist_ndx_list batch_redo_list;
  68 /* We're either updating the basis file or an identical copy: */
  69 static int updating_basis_or_equiv;
  70
  71 #define TMPNAME_SUFFIX ".XXXXXX"
  72 #define TMPNAME_SUFFIX_LEN ((int)sizeof TMPNAME_SUFFIX - 1)
  73 #define MAX_UNIQUE_NUMBER 999999
  74 #define MAX_UNIQUE_LOOP 100
  75
  76 /* get_tmpname() - create a tmp filename for a given filename
  77  *
  78  * If a tmpdir is defined, use that as the directory to put it in.  Otherwise,
  79  * the tmp filename is in the same directory as the given name.  Note that
  80  * there may be no directory at all in the given name!
  81  *
  82  * The tmp filename is basically the given filename with a dot prepended, and
  83  * .XXXXXX appended (for mkstemp() to put its unique gunk in).  We take care
  84  * to not exceed either the MAXPATHLEN or NAME_MAX, especially the last, as
  85  * the basename basically becomes 8 characters longer.  In such a case, the
  86  * original name is shortened sufficiently to make it all fit.
  87  *
  88  * If the make_unique arg is True, the XXXXXX string is replaced with a unique
  89  * string that doesn't exist at the time of the check.  This is intended to be
  90  * used for creating hard links, symlinks, devices, and special files, since
  91  * normal files should be handled by mkstemp() for safety.
  92  *
  93  * Of course, the only reason the file is based on the original name is to
  94  * make it easier to figure out what purpose a temp file is serving when a
  95  * transfer is in progress. */
  96 int get_tmpname(char *fnametmp, const char *fname, BOOL make_unique)
  97 {
  98         int maxname, length = 0;
  99         const char *f;
 100         char *suf;
 101
 102         if (tmpdir) {
 103                 /* Note: this can't overflow, so the return value is safe */
 104                 length = strlcpy(fnametmp, tmpdir, MAXPATHLEN - 2);
 105                 fnametmp[length++] = '/';
 106         }
 107
 108         if ((f = strrchr(fname, '/')) != NULL) {
 109                 ++f;
 110                 if (!tmpdir) {
 111                         length = f - fname;
 112                         /* copy up to and including the slash */
 113                         strlcpy(fnametmp, fname, length + 1);
 114                 }
 115         } else
 116                 f = fname;
 117
 118         if (!tmpdir) { /* using a tmpdir avoids the leading dot on our temp names */
 119                 if (*f == '.') /* avoid an extra leading dot for OS X's sake */
 120                         f++;
 121                 fnametmp[length++] = '.';
 122         }
 123
 124         /* The maxname value is bufsize, and includes space for the '\0'.
 125          * NAME_MAX needs an extra -1 for the name's leading dot. */
 126         maxname = MIN(MAXPATHLEN - length - TMPNAME_SUFFIX_LEN,
 127                       NAME_MAX - 1 - TMPNAME_SUFFIX_LEN);
 128
 129         if (maxname < 0) {
 130                 rprintf(FERROR_XFER, "temporary filename too long: %s\n", fname);
 131                 fnametmp[0] = '\0';
 132                 return 0;
 133         }
 134
 135         if (maxname) {
 136                 int added = strlcpy(fnametmp + length, f, maxname);
 137                 if (added >= maxname)
 138                         added = maxname - 1;
 139                 suf = fnametmp + length + added;
 140
 141                 /* Trim any dangling high-bit chars if the first-trimmed char (if any) is
 142                  * also a high-bit char, just in case we cut into a multi-byte sequence.
 143                  * We are guaranteed to stop because of the leading '.' we added. */
 144                 if ((int)f[added] & 0x80) {
 145                         while ((int)suf[-1] & 0x80)
 146                                 suf--;
 147                 }
 148                 /* trim one trailing dot before our suffix's dot */
 149                 if (suf[-1] == '.')
 150                         suf--;
 151         } else
 152                 suf = fnametmp + length - 1; /* overwrite the leading dot with suffix's dot */
 153
 154         if (make_unique) {
 155                 static unsigned counter_limit;
 156                 unsigned counter;
 157
 158                 if (!counter_limit) {
 159                         counter_limit = (unsigned)getpid() + MAX_UNIQUE_LOOP;
 160                         if (counter_limit > MAX_UNIQUE_NUMBER || counter_limit < MAX_UNIQUE_LOOP)
 161                                 counter_limit = MAX_UNIQUE_LOOP;
 162                 }
 163                 counter = counter_limit - MAX_UNIQUE_LOOP;
 164
 165                 /* This doesn't have to be very good because we don't need
 166                  * to worry about someone trying to guess the values:  all
 167                  * a conflict will do is cause a device, special file, hard
 168                  * link, or symlink to fail to be created.  Also: avoid
 169                  * using mktemp() due to gcc's annoying warning. */
 170                 while (1) {
 171                         snprintf(suf, TMPNAME_SUFFIX_LEN+1, ".%d", counter);
 172                         if (access(fnametmp, 0) < 0)
 173                                 break;
 174                         if (++counter >= counter_limit)
 175                                 return 0;
 176                 }
 177         } else
 178                 memcpy(suf, TMPNAME_SUFFIX, TMPNAME_SUFFIX_LEN+1);
 179
 180         return 1;
 181 }
 182
 183 /* Opens a temporary file for writing.
 184  * Success: Writes name into fnametmp, returns fd.
 185  * Failure: Clobbers fnametmp, returns -1.
 186  * Calling cleanup_set() is the caller's job. */
 187 int open_tmpfile(char *fnametmp, const char *fname, struct file_struct *file)
 188 {
 189         int fd;
 190         mode_t added_perms;
 191
 192         if (!get_tmpname(fnametmp, fname, False))
 193                 return -1;
 194
 195         if (am_root < 0) {
 196                 /* For --fake-super, the file must be useable by the copying
 197                  * user, just like it would be for root. */
 198                 added_perms = S_IRUSR|S_IWUSR;
 199         } else {
 200                 /* For a normal copy, we need to be able to tweak things like xattrs. */
 201                 added_perms = S_IWUSR;
 202         }
 203
 204         /* We initially set the perms without the setuid/setgid bits or group
 205          * access to ensure that there is no race condition.  They will be
 206          * correctly updated after the right owner and group info is set.
 207          * (Thanks to snabb@epipe.fi for pointing this out.) */
 208         fd = do_mkstemp(fnametmp, (file->mode|added_perms) & INITACCESSPERMS);
 209
 210 #if 0
 211         /* In most cases parent directories will already exist because their
 212          * information should have been previously transferred, but that may
 213          * not be the case with -R */
 214         if (fd == -1 && relative_paths && errno == ENOENT
 215          && make_path(fnametmp, MKP_SKIP_SLASH | MKP_DROP_NAME) == 0) {
 216                 /* Get back to name with XXXXXX in it. */
 217                 get_tmpname(fnametmp, fname, False);
 218                 fd = do_mkstemp(fnametmp, (file->mode|added_perms) & INITACCESSPERMS);
 219         }
 220 #endif
 221
 222         if (fd == -1) {
 223                 rsyserr(FERROR_XFER, errno, "mkstemp %s failed",
 224                         full_fname(fnametmp));
 225                 return -1;
 226         }
 227
 228         return fd;
 229 }
 230
 231 static int receive_data(int f_in, char *fname_r, int fd_r, OFF_T size_r,
 232                         const char *fname, int fd, OFF_T total_size)
 233 {
 234         static char file_sum1[MAX_DIGEST_LEN];
 235         struct map_struct *mapbuf;
 236         struct sum_struct sum;
 237         int32 len;
 238         OFF_T offset = 0;
 239         OFF_T offset2;
 240         char *data;
 241         int32 i;
 242         char *map = NULL;
 243 #ifdef SUPPORT_PREALLOCATION
 244 #ifdef PREALLOCATE_NEEDS_TRUNCATE
 245         OFF_T preallocated_len = 0;
 246 #endif
 247
 248         if (preallocate_files && fd != -1 && total_size > 0 && (!inplace || total_size > size_r)) {
 249                 /* Try to preallocate enough space for file's eventual length.  Can
 250                  * reduce fragmentation on filesystems like ext4, xfs, and NTFS. */
 251                 if (do_fallocate(fd, 0, total_size) == 0) {
 252 #ifdef PREALLOCATE_NEEDS_TRUNCATE
 253                         preallocated_len = total_size;
 254 #endif
 255                 } else
 256                         rsyserr(FWARNING, errno, "do_fallocate %s", full_fname(fname));
 257         }
 258 #endif
 259
 260         read_sum_head(f_in, &sum);
 261
 262         if (fd_r >= 0 && size_r > 0) {
 263                 int32 read_size = MAX(sum.blength * 2, 16*1024);
 264                 mapbuf = map_file(fd_r, size_r, read_size, sum.blength);
 265                 if (DEBUG_GTE(DELTASUM, 2)) {
 266                         rprintf(FINFO, "recv mapped %s of size %s\n",
 267                                 fname_r, big_num(size_r));
 268                 }
 269         } else
 270                 mapbuf = NULL;
 271
 272         sum_init(checksum_seed);
 273
 274         if (append_mode > 0) {
 275                 OFF_T j;
 276                 sum.flength = (OFF_T)sum.count * sum.blength;
 277                 if (sum.remainder)
 278                         sum.flength -= sum.blength - sum.remainder;
 279                 if (append_mode == 2 && mapbuf) {
 280                         for (j = CHUNK_SIZE; j < sum.flength; j += CHUNK_SIZE) {
 281                                 if (INFO_GTE(PROGRESS, 1))
 282                                         show_progress(offset, total_size);
 283                                 sum_update(map_ptr(mapbuf, offset, CHUNK_SIZE),
 284                                            CHUNK_SIZE);
 285                                 offset = j;
 286                         }
 287                         if (offset < sum.flength) {
 288                                 int32 len = (int32)(sum.flength - offset);
 289                                 if (INFO_GTE(PROGRESS, 1))
 290                                         show_progress(offset, total_size);
 291                                 sum_update(map_ptr(mapbuf, offset, len), len);
 292                         }
 293                 }
 294                 offset = sum.flength;
 295                 if (fd != -1 && (j = do_lseek(fd, offset, SEEK_SET)) != offset) {
 296                         rsyserr(FERROR_XFER, errno, "lseek of %s returned %s, not %s",
 297                                 full_fname(fname), big_num(j), big_num(offset));
 298                         exit_cleanup(RERR_FILEIO);
 299                 }
 300         }
 301
 302         while ((i = recv_token(f_in, &data)) != 0) {
 303                 if (INFO_GTE(PROGRESS, 1))
 304                         show_progress(offset, total_size);
 305
 306                 if (allowed_lull)
 307                         maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH | MSK_ACTIVE_RECEIVER);
 308
 309                 if (i > 0) {
 310                         if (DEBUG_GTE(DELTASUM, 3)) {
 311                                 rprintf(FINFO,"data recv %d at %s\n",
 312                                         i, big_num(offset));
 313                         }
 314
 315                         stats.literal_data += i;
 316                         cleanup_got_literal = 1;
 317
 318                         sum_update(data, i);
 319
 320                         if (fd != -1 && write_file(fd,data,i) != i)
 321                                 goto report_write_error;
 322                         offset += i;
 323                         continue;
 324                 }
 325
 326                 i = -(i+1);
 327                 offset2 = i * (OFF_T)sum.blength;
 328                 len = sum.blength;
 329                 if (i == (int)sum.count-1 && sum.remainder != 0)
 330                         len = sum.remainder;
 331
 332                 stats.matched_data += len;
 333
 334                 if (DEBUG_GTE(DELTASUM, 3)) {
 335                         rprintf(FINFO,
 336                                 "chunk[%d] of size %ld at %s offset=%s%s\n",
 337                                 i, (long)len, big_num(offset2), big_num(offset),
 338                                 updating_basis_or_equiv && offset == offset2 ? " (seek)" : "");
 339                 }
 340
 341                 if (mapbuf) {
 342                         map = map_ptr(mapbuf,offset2,len);
 343
 344                         see_token(map, len);
 345                         sum_update(map, len);
 346                 }
 347
 348                 if (updating_basis_or_equiv) {
 349                         if (offset == offset2 && fd != -1) {
 350                                 OFF_T pos;
 351                                 if (flush_write_file(fd) < 0)
 352                                         goto report_write_error;
 353                                 offset += len;
 354                                 if ((pos = do_lseek(fd, len, SEEK_CUR)) != offset) {
 355                                         rsyserr(FERROR_XFER, errno,
 356                                                 "lseek of %s returned %s, not %s",
 357                                                 full_fname(fname),
 358                                                 big_num(pos), big_num(offset));
 359                                         exit_cleanup(RERR_FILEIO);
 360                                 }
 361                                 continue;
 362                         }
 363                 }
 364                 if (fd != -1 && map && write_file(fd, map, len) != (int)len)
 365                         goto report_write_error;
 366                 offset += len;
 367         }
 368
 369         if (flush_write_file(fd) < 0)
 370                 goto report_write_error;
 371
 372 #ifdef HAVE_FTRUNCATE
 373         /* inplace: New data could be shorter than old data.
 374          * preallocate_files: total_size could have been an overestimate.
 375          *     Cut off any extra preallocated zeros from dest file. */
 376         if ((inplace
 377 #ifdef PREALLOCATE_NEEDS_TRUNCATE
 378           || preallocated_len > offset
 379 #endif
 380           ) && fd != -1 && do_ftruncate(fd, offset) < 0) {
 381                 rsyserr(FERROR_XFER, errno, "ftruncate failed on %s",
 382                         full_fname(fname));
 383         }
 384 #endif
 385
 386         if (INFO_GTE(PROGRESS, 1))
 387                 end_progress(total_size);
 388
 389         if (fd != -1 && offset > 0 && sparse_end(fd, offset) != 0) {
 390             report_write_error:
 391                 rsyserr(FERROR_XFER, errno, "write failed on %s",
 392                         full_fname(fname));
 393                 exit_cleanup(RERR_FILEIO);
 394         }
 395
 396         if (sum_end(file_sum1) != checksum_len)
 397                 overflow_exit("checksum_len"); /* Impossible... */
 398
 399         if (mapbuf)
 400                 unmap_file(mapbuf);
 401
 402         read_buf(f_in, sender_file_sum, checksum_len);
 403         if (DEBUG_GTE(DELTASUM, 2))
 404                 rprintf(FINFO,"got file_sum\n");
 405         if (fd != -1 && memcmp(file_sum1, sender_file_sum, checksum_len) != 0)
 406                 return 0;
 407         return 1;
 408 }
 409
 410
 411 static void discard_receive_data(int f_in, OFF_T length)
 412 {
 413         receive_data(f_in, NULL, -1, 0, NULL, -1, length);
 414 }
 415
 416 static void handle_delayed_updates(char *local_name)
 417 {
 418         char *fname, *partialptr;
 419         int ndx;
 420
 421         for (ndx = -1; (ndx = bitbag_next_bit(delayed_bits, ndx)) >= 0; ) {
 422                 struct file_struct *file = cur_flist->files[ndx];
 423                 fname = local_name ? local_name : f_name(file, NULL);
 424                 if ((partialptr = partial_dir_fname(fname)) != NULL) {
 425                         if (make_backups > 0 && !make_backup(fname, False))
 426                                 continue;
 427                         if (DEBUG_GTE(RECV, 1)) {
 428                                 rprintf(FINFO, "renaming %s to %s\n",
 429                                         partialptr, fname);
 430                         }
 431                         /* We don't use robust_rename() here because the
 432                          * partial-dir must be on the same drive. */
 433                         if (do_rename(partialptr, fname) < 0) {
 434                                 rsyserr(FERROR_XFER, errno,
 435                                         "rename failed for %s (from %s)",
 436                                         full_fname(fname), partialptr);
 437                         } else {
 438                                 if (remove_source_files
 439                                  || (preserve_hard_links && F_IS_HLINKED(file)))
 440                                         send_msg_int(MSG_SUCCESS, ndx);
 441                                 handle_partial_dir(partialptr, PDIR_DELETE);
 442                         }
 443                 }
 444         }
 445 }
 446
 447 static void no_batched_update(int ndx, BOOL is_redo)
 448 {
 449         struct file_list *flist = flist_for_ndx(ndx, "no_batched_update");
 450         struct file_struct *file = flist->files[ndx - flist->ndx_start];
 451
 452         rprintf(FERROR_XFER, "(No batched update for%s \"%s\")\n",
 453                 is_redo ? " resend of" : "", f_name(file, NULL));
 454
 455         if (inc_recurse && !dry_run)
 456                 send_msg_int(MSG_NO_SEND, ndx);
 457 }
 458
 459 static int we_want_redo(int desired_ndx)
 460 {
 461         static int redo_ndx = -1;
 462
 463         while (redo_ndx < desired_ndx) {
 464                 if (redo_ndx >= 0)
 465                         no_batched_update(redo_ndx, True);
 466                 if ((redo_ndx = flist_ndx_pop(&batch_redo_list)) < 0)
 467                         return 0;
 468         }
 469
 470         if (redo_ndx == desired_ndx) {
 471                 redo_ndx = -1;
 472                 return 1;
 473         }
 474
 475         return 0;
 476 }
 477
 478 static int gen_wants_ndx(int desired_ndx, int flist_num)
 479 {
 480         static int next_ndx = -1;
 481         static int done_cnt = 0;
 482         static BOOL got_eof = False;
 483
 484         if (got_eof)
 485                 return 0;
 486
 487         /* TODO: integrate gen-reading I/O into perform_io() so this is not needed? */
 488         io_flush(FULL_FLUSH);
 489
 490         while (next_ndx < desired_ndx) {
 491                 if (inc_recurse && flist_num <= done_cnt)
 492                         return 0;
 493                 if (next_ndx >= 0)
 494                         no_batched_update(next_ndx, False);
 495                 if ((next_ndx = read_int(batch_gen_fd)) < 0) {
 496                         if (inc_recurse) {
 497                                 done_cnt++;
 498                                 continue;
 499                         }
 500                         got_eof = True;
 501                         return 0;
 502                 }
 503         }
 504
 505         if (next_ndx == desired_ndx) {
 506                 next_ndx = -1;
 507                 return 1;
 508         }
 509
 510         return 0;
 511 }
 512
 513 /**
 514  * main routine for receiver process.
 515  *
 516  * Receiver process runs on the same host as the generator process. */
 517 int recv_files(int f_in, int f_out, char *local_name)
 518 {
 519         int fd1,fd2;
 520         STRUCT_STAT st;
 521         int iflags, xlen;
 522         char *fname, fbuf[MAXPATHLEN];
 523         char xname[MAXPATHLEN];
 524         char fnametmp[MAXPATHLEN];
 525         char *fnamecmp, *partialptr;
 526         char fnamecmpbuf[MAXPATHLEN];
 527         uchar fnamecmp_type;
 528         struct file_struct *file;
 529         int itemizing = am_server ? logfile_format_has_i : stdout_format_has_i;
 530         enum logcode log_code = log_before_transfer ? FLOG : FINFO;
 531         int max_phase = protocol_version >= 29 ? 2 : 1;
 532         int dflt_perms = (ACCESSPERMS & ~orig_umask);
 533 #ifdef SUPPORT_ACLS
 534         const char *parent_dirname = "";
 535 #endif
 536         int ndx, recv_ok;
 537
 538         if (DEBUG_GTE(RECV, 1))
 539                 rprintf(FINFO, "recv_files(%d) starting\n", cur_flist->used);
 540
 541         if (delay_updates)
 542                 delayed_bits = bitbag_create(cur_flist->used + 1);
 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 && INFO_GTE(PROGRESS, 2) && cur_flist) {
 552                                 set_current_file_index(NULL, 0);
 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 #ifdef SUPPORT_XATTRS
 587                 if (preserve_xattrs && iflags & ITEM_REPORT_XATTR && do_xfers
 588                  && !(want_xattr_optim && BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE)))
 589                         recv_xattr_request(file, f_in);
 590 #endif
 591
 592                 if (!(iflags & ITEM_TRANSFER)) {
 593                         maybe_log_item(file, iflags, itemizing, xname);
 594 #ifdef SUPPORT_XATTRS
 595                         if (preserve_xattrs && iflags & ITEM_REPORT_XATTR && do_xfers
 596                          && !BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE))
 597                                 set_file_attrs(fname, file, NULL, fname, 0);
 598 #endif
 599                         if (iflags & ITEM_IS_NEW) {
 600                                 stats.created_files++;
 601                                 if (S_ISREG(file->mode)) {
 602                                         /* Nothing further to count. */
 603                                 } else if (S_ISDIR(file->mode))
 604                                         stats.created_dirs++;
 605 #ifdef SUPPORT_LINKS
 606                                 else if (S_ISLNK(file->mode))
 607                                         stats.created_symlinks++;
 608 #endif
 609                                 else if (IS_DEVICE(file->mode))
 610                                         stats.created_devices++;
 611                                 else
 612                                         stats.created_specials++;
 613                         }
 614                         continue;
 615                 }
 616                 if (phase == 2) {
 617                         rprintf(FERROR,
 618                                 "got transfer request in phase 2 [%s]\n",
 619                                 who_am_i());
 620                         exit_cleanup(RERR_PROTOCOL);
 621                 }
 622
 623                 if (file->flags & FLAG_FILE_SENT) {
 624                         if (csum_length == SHORT_SUM_LENGTH) {
 625                                 if (keep_partial && !partial_dir)
 626                                         make_backups = -make_backups; /* prevents double backup */
 627                                 if (append_mode)
 628                                         sparse_files = -sparse_files;
 629                                 append_mode = -append_mode;
 630                                 csum_length = SUM_LENGTH;
 631                                 redoing = 1;
 632                         }
 633                 } else {
 634                         if (csum_length != SHORT_SUM_LENGTH) {
 635                                 if (keep_partial && !partial_dir)
 636                                         make_backups = -make_backups;
 637                                 if (append_mode)
 638                                         sparse_files = -sparse_files;
 639                                 append_mode = -append_mode;
 640                                 csum_length = SHORT_SUM_LENGTH;
 641                                 redoing = 0;
 642                         }
 643                         if (iflags & ITEM_IS_NEW)
 644                                 stats.created_files++;
 645                 }
 646
 647                 if (!am_server && INFO_GTE(PROGRESS, 1))
 648                         set_current_file_index(file, ndx);
 649                 stats.xferred_files++;
 650                 stats.total_transferred_size += F_LENGTH(file);
 651
 652                 cleanup_got_literal = 0;
 653
 654                 if (daemon_filter_list.head
 655                     && check_filter(&daemon_filter_list, FLOG, fname, 0) < 0) {
 656                         rprintf(FERROR, "attempt to hack rsync failed.\n");
 657                         exit_cleanup(RERR_PROTOCOL);
 658                 }
 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, F_LENGTH(file));
 670                                 file->flags |= FLAG_FILE_SENT;
 671                                 continue;
 672                         }
 673                 }
 674
 675                 if (!log_before_transfer)
 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, F_LENGTH(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, F_LENGTH(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, fname, 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                                 fd1 = do_open(fnamecmp, O_RDONLY, 0);
 757                         }
 758
 759                         if (fd1 == -1 && basis_dir[0]) {
 760                                 /* pre-29 allowed only one alternate basis */
 761                                 pathjoin(fnamecmpbuf, sizeof fnamecmpbuf,
 762                                          basis_dir[0], fname);
 763                                 fnamecmp = fnamecmpbuf;
 764                                 fd1 = do_open(fnamecmp, O_RDONLY, 0);
 765                         }
 766                 }
 767
 768                 updating_basis_or_equiv = inplace
 769                     && (fnamecmp == fname || fnamecmp_type == FNAMECMP_BACKUP);
 770
 771                 if (fd1 == -1) {
 772                         st.st_mode = 0;
 773                         st.st_size = 0;
 774                 } else if (do_fstat(fd1,&st) != 0) {
 775                         rsyserr(FERROR_XFER, errno, "fstat %s failed",
 776                                 full_fname(fnamecmp));
 777                         discard_receive_data(f_in, F_LENGTH(file));
 778                         close(fd1);
 779                         if (inc_recurse)
 780                                 send_msg_int(MSG_NO_SEND, ndx);
 781                         continue;
 782                 }
 783
 784                 if (fd1 != -1 && S_ISDIR(st.st_mode) && fnamecmp == fname) {
 785                         /* this special handling for directories
 786                          * wouldn't be necessary if robust_rename()
 787                          * and the underlying robust_unlink could cope
 788                          * with directories
 789                          */
 790                         rprintf(FERROR_XFER, "recv_files: %s is a directory\n",
 791                                 full_fname(fnamecmp));
 792                         discard_receive_data(f_in, F_LENGTH(file));
 793                         close(fd1);
 794                         if (inc_recurse)
 795                                 send_msg_int(MSG_NO_SEND, ndx);
 796                         continue;
 797                 }
 798
 799                 if (fd1 != -1 && !S_ISREG(st.st_mode)) {
 800                         close(fd1);
 801                         fd1 = -1;
 802                 }
 803
 804                 /* If we're not preserving permissions, change the file-list's
 805                  * mode based on the local permissions and some heuristics. */
 806                 if (!preserve_perms) {
 807                         int exists = fd1 != -1;
 808 #ifdef SUPPORT_ACLS
 809                         const char *dn = file->dirname ? file->dirname : ".";
 810                         if (parent_dirname != dn
 811                          && strcmp(parent_dirname, dn) != 0) {
 812                                 dflt_perms = default_perms_for_dir(dn);
 813                                 parent_dirname = dn;
 814                         }
 815 #endif
 816                         file->mode = dest_mode(file->mode, st.st_mode,
 817                                                dflt_perms, exists);
 818                 }
 819
 820                 /* We now check to see if we are writing the file "inplace" */
 821                 if (inplace)  {
 822                         fd2 = do_open(fname, O_WRONLY|O_CREAT, 0600);
 823                         if (fd2 == -1) {
 824                                 rsyserr(FERROR_XFER, errno, "open %s failed",
 825                                         full_fname(fname));
 826                         } else if (updating_basis_or_equiv)
 827                                 cleanup_set(NULL, NULL, file, fd1, fd2);
 828                 } else {
 829                         fd2 = open_tmpfile(fnametmp, fname, file);
 830                         if (fd2 != -1)
 831                                 cleanup_set(fnametmp, partialptr, file, fd1, fd2);
 832                 }
 833
 834                 if (fd2 == -1) {
 835                         discard_receive_data(f_in, F_LENGTH(file));
 836                         if (fd1 != -1)
 837                                 close(fd1);
 838                         if (inc_recurse)
 839                                 send_msg_int(MSG_NO_SEND, ndx);
 840                         continue;
 841                 }
 842
 843                 /* log the transfer */
 844                 if (log_before_transfer)
 845                         log_item(FCLIENT, file, iflags, NULL);
 846                 else if (!am_server && INFO_GTE(NAME, 1) && INFO_EQ(PROGRESS, 1))
 847                         rprintf(FINFO, "%s\n", fname);
 848
 849                 /* recv file data */
 850                 recv_ok = receive_data(f_in, fnamecmp, fd1, st.st_size,
 851                                        fname, fd2, F_LENGTH(file));
 852
 853                 log_item(log_code, file, iflags, NULL);
 854
 855                 if (fd1 != -1)
 856                         close(fd1);
 857                 if (close(fd2) < 0) {
 858                         rsyserr(FERROR, errno, "close failed on %s",
 859                                 full_fname(fnametmp));
 860                         exit_cleanup(RERR_FILEIO);
 861                 }
 862
 863                 if ((recv_ok && (!delay_updates || !partialptr)) || inplace) {
 864                         if (partialptr == fname)
 865                                 partialptr = NULL;
 866                         if (!finish_transfer(fname, fnametmp, fnamecmp,
 867                                              partialptr, file, recv_ok, 1))
 868                                 recv_ok = -1;
 869                         else if (fnamecmp == partialptr) {
 870                                 do_unlink(partialptr);
 871                                 handle_partial_dir(partialptr, PDIR_DELETE);
 872                         }
 873                 } else if (keep_partial && partialptr) {
 874                         if (!handle_partial_dir(partialptr, PDIR_CREATE)) {
 875                                 rprintf(FERROR,
 876                                     "Unable to create partial-dir for %s -- discarding %s.\n",
 877                                     local_name ? local_name : f_name(file, NULL),
 878                                     recv_ok ? "completed file" : "partial file");
 879                                 do_unlink(fnametmp);
 880                                 recv_ok = -1;
 881                         } else if (!finish_transfer(partialptr, fnametmp, fnamecmp, NULL,
 882                                                     file, recv_ok, !partial_dir))
 883                                 recv_ok = -1;
 884                         else if (delay_updates && recv_ok) {
 885                                 bitbag_set_bit(delayed_bits, ndx);
 886                                 recv_ok = 2;
 887                         } else
 888                                 partialptr = NULL;
 889                 } else
 890                         do_unlink(fnametmp);
 891
 892                 cleanup_disable();
 893
 894                 if (read_batch)
 895                         file->flags |= FLAG_FILE_SENT;
 896
 897                 switch (recv_ok) {
 898                 case 2:
 899                         break;
 900                 case 1:
 901                         if (remove_source_files || inc_recurse
 902                          || (preserve_hard_links && F_IS_HLINKED(file)))
 903                                 send_msg_int(MSG_SUCCESS, ndx);
 904                         break;
 905                 case 0: {
 906                         enum logcode msgtype = redoing ? FERROR_XFER : FWARNING;
 907                         if (msgtype == FERROR_XFER || INFO_GTE(NAME, 1)) {
 908                                 char *errstr, *redostr, *keptstr;
 909                                 if (!(keep_partial && partialptr) && !inplace)
 910                                         keptstr = "discarded";
 911                                 else if (partial_dir)
 912                                         keptstr = "put into partial-dir";
 913                                 else
 914                                         keptstr = "retained";
 915                                 if (msgtype == FERROR_XFER) {
 916                                         errstr = "ERROR";
 917                                         redostr = "";
 918                                 } else {
 919                                         errstr = "WARNING";
 920                                         redostr = read_batch ? " (may try again)"
 921                                                              : " (will try again)";
 922                                 }
 923                                 rprintf(msgtype,
 924                                         "%s: %s failed verification -- update %s%s.\n",
 925                                         errstr, local_name ? f_name(file, NULL) : fname,
 926                                         keptstr, redostr);
 927                         }
 928                         if (!redoing) {
 929                                 if (read_batch)
 930                                         flist_ndx_push(&batch_redo_list, ndx);
 931                                 send_msg_int(MSG_REDO, ndx);
 932                                 file->flags |= FLAG_FILE_SENT;
 933                         } else if (inc_recurse)
 934                                 send_msg_int(MSG_NO_SEND, ndx);
 935                         break;
 936                     }
 937                 case -1:
 938                         if (inc_recurse)
 939                                 send_msg_int(MSG_NO_SEND, ndx);
 940                         break;
 941                 }
 942         }
 943         if (make_backups < 0)
 944                 make_backups = -make_backups;
 945
 946         if (phase == 2 && delay_updates) /* for protocol_version < 29 */
 947                 handle_delayed_updates(local_name);
 948
 949         if (DEBUG_GTE(RECV, 1))
 950                 rprintf(FINFO,"recv_files finished\n");
 951
 952         return 0;
 953 }