receiver.c

   1 /*
   2  * Routines only used by the receiving process.
   3  *
   4  * Copyright (C) 1996-2000 Andrew Tridgell
   5  * Copyright (C) 1996 Paul Mackerras
   6  * Copyright (C) 2003-2009 Wayne Davison
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 3 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, visit the http://fsf.org website.
  20  */
  21
  22 #include "rsync.h"
  23 #include "inums.h"
  24
  25 extern int dry_run;
  26 extern int do_xfers;
  27 extern int am_server;
  28 extern int inc_recurse;
  29 extern int log_before_transfer;
  30 extern int stdout_format_has_i;
  31 extern int logfile_format_has_i;
  32 extern int csum_length;
  33 extern int read_batch;
  34 extern int write_batch;
  35 extern int batch_gen_fd;
  36 extern int protocol_version;
  37 extern int relative_paths;
  38 extern int preserve_hard_links;
  39 extern int preserve_perms;
  40 extern int preserve_xattrs;
  41 extern int basis_dir_cnt;
  42 extern int make_backups;
  43 extern int cleanup_got_literal;
  44 extern int remove_source_files;
  45 extern int append_mode;
  46 extern int sparse_files;
  47 extern int keep_partial;
  48 extern int checksum_len;
  49 extern int checksum_seed;
  50 extern int inplace;
  51 extern int allowed_lull;
  52 extern int delay_updates;
  53 extern mode_t orig_umask;
  54 extern struct stats stats;
  55 extern char *tmpdir;
  56 extern char *partial_dir;
  57 extern char *basis_dir[MAX_BASIS_DIRS+1];
  58 extern char sender_file_sum[MAX_DIGEST_LEN];
  59 extern struct file_list *cur_flist, *first_flist, *dir_flist;
  60 extern filter_rule_list daemon_filter_list;
  61
  62 static struct bitbag *delayed_bits = NULL;
  63 static int phase = 0, redoing = 0;
  64 static flist_ndx_list batch_redo_list;
  65 /* We're either updating the basis file or an identical copy: */
  66 static int updating_basis_or_equiv;
  67
  68 #define TMPNAME_SUFFIX ".XXXXXX"
  69 #define TMPNAME_SUFFIX_LEN ((int)sizeof TMPNAME_SUFFIX - 1)
  70 #define MAX_UNIQUE_NUMBER 999999
  71 #define MAX_UNIQUE_LOOP 100
  72
  73 /* get_tmpname() - create a tmp filename for a given filename
  74  *
  75  * If a tmpdir is defined, use that as the directory to put it in.  Otherwise,
  76  * the tmp filename is in the same directory as the given name.  Note that
  77  * there may be no directory at all in the given name!
  78  *
  79  * The tmp filename is basically the given filename with a dot prepended, and
  80  * .XXXXXX appended (for mkstemp() to put its unique gunk in).  We take care
  81  * to not exceed either the MAXPATHLEN or NAME_MAX, especially the last, as
  82  * the basename basically becomes 8 characters longer.  In such a case, the
  83  * original name is shortened sufficiently to make it all fit.
  84  *
  85  * If the make_unique arg is True, the XXXXXX string is replaced with a unique
  86  * string that doesn't exist at the time of the check.  This is intended to be
  87  * used for creating hard links, symlinks, devices, and special files, since
  88  * normal files should be handled by mkstemp() for safety.
  89  *
  90  * Of course, the only reason the file is based on the original name is to
  91  * make it easier to figure out what purpose a temp file is serving when a
  92  * transfer is in progress. */
  93 int get_tmpname(char *fnametmp, const char *fname, BOOL make_unique)
  94 {
  95         int maxname, added, length = 0;
  96         const char *f;
  97         char *suf;
  98
  99         if (tmpdir) {
 100                 /* Note: this can't overflow, so the return value is safe */
 101                 length = strlcpy(fnametmp, tmpdir, MAXPATHLEN - 2);
 102                 fnametmp[length++] = '/';
 103         }
 104
 105         if ((f = strrchr(fname, '/')) != NULL) {
 106                 ++f;
 107                 if (!tmpdir) {
 108                         length = f - fname;
 109                         /* copy up to and including the slash */
 110                         strlcpy(fnametmp, fname, length + 1);
 111                 }
 112         } else
 113                 f = fname;
 114         fnametmp[length++] = '.';
 115
 116         /* The maxname value is bufsize, and includes space for the '\0'.
 117          * NAME_MAX needs an extra -1 for the name's leading dot. */
 118         maxname = MIN(MAXPATHLEN - length - TMPNAME_SUFFIX_LEN,
 119                       NAME_MAX - 1 - TMPNAME_SUFFIX_LEN);
 120
 121         if (maxname < 1) {
 122                 rprintf(FERROR_XFER, "temporary filename too long: %s\n", fname);
 123                 fnametmp[0] = '\0';
 124                 return 0;
 125         }
 126
 127         added = strlcpy(fnametmp + length, f, maxname);
 128         if (added >= maxname)
 129                 added = maxname - 1;
 130         suf = fnametmp + length + added;
 131
 132         /* Trim any dangling high-bit chars if the first-trimmed char (if any) is
 133          * also a high-bit char, just in case we cut into a multi-byte sequence.
 134          * We are guaranteed to stop because of the leading '.' we added. */
 135         if ((int)f[added] & 0x80) {
 136                 while ((int)suf[-1] & 0x80)
 137                         suf--;
 138         }
 139
 140         if (make_unique) {
 141                 static unsigned counter_limit;
 142                 unsigned counter;
 143
 144                 if (!counter_limit) {
 145                         counter_limit = (unsigned)getpid() + MAX_UNIQUE_LOOP;
 146                         if (counter_limit > MAX_UNIQUE_NUMBER || counter_limit < MAX_UNIQUE_LOOP)
 147                                 counter_limit = MAX_UNIQUE_LOOP;
 148                 }
 149                 counter = counter_limit - MAX_UNIQUE_LOOP;
 150
 151                 /* This doesn't have to be very good because we don't need
 152                  * to worry about someone trying to guess the values:  all
 153                  * a conflict will do is cause a device, special file, hard
 154                  * link, or symlink to fail to be created.  Also: avoid
 155                  * using mktemp() due to gcc's annoying warning. */
 156                 while (1) {
 157                         snprintf(suf, TMPNAME_SUFFIX_LEN+1, ".%d", counter);
 158                         if (access(fnametmp, 0) < 0)
 159                                 break;
 160                         if (++counter >= counter_limit)
 161                                 return 0;
 162                 }
 163         } else
 164                 memcpy(suf, TMPNAME_SUFFIX, TMPNAME_SUFFIX_LEN+1);
 165
 166         return 1;
 167 }
 168
 169 /* Opens a temporary file for writing.
 170  * Success: Writes name into fnametmp, returns fd.
 171  * Failure: Clobbers fnametmp, returns -1.
 172  * Calling cleanup_set() is the caller's job. */
 173 int open_tmpfile(char *fnametmp, const char *fname, struct file_struct *file)
 174 {
 175         int fd;
 176
 177         if (!get_tmpname(fnametmp, fname, False))
 178                 return -1;
 179
 180         /* We initially set the perms without the setuid/setgid bits or group
 181          * access to ensure that there is no race condition.  They will be
 182          * correctly updated after the right owner and group info is set.
 183          * (Thanks to snabb@epipe.fi for pointing this out.) */
 184         fd = do_mkstemp(fnametmp, (file->mode & INITACCESSPERMS) | S_IWUSR);
 185
 186 #if 0
 187         /* In most cases parent directories will already exist because their
 188          * information should have been previously transferred, but that may
 189          * not be the case with -R */
 190         if (fd == -1 && relative_paths && errno == ENOENT
 191          && make_path(fnametmp, MKP_SKIP_SLASH | MKP_DROP_NAME) == 0) {
 192                 /* Get back to name with XXXXXX in it. */
 193                 get_tmpname(fnametmp, fname, False);
 194                 fd = do_mkstemp(fnametmp, file->mode & INITACCESSPERMS);
 195         }
 196 #endif
 197
 198         if (fd == -1) {
 199                 rsyserr(FERROR_XFER, errno, "mkstemp %s failed",
 200                         full_fname(fnametmp));
 201                 return -1;
 202         }
 203
 204         return fd;
 205 }
 206
 207 static int receive_data(int f_in, char *fname_r, int fd_r, OFF_T size_r,
 208                         const char *fname, int fd, OFF_T total_size)
 209 {
 210         static char file_sum1[MAX_DIGEST_LEN];
 211         struct map_struct *mapbuf;
 212         struct sum_struct sum;
 213         int32 len;
 214         OFF_T offset = 0;
 215         OFF_T offset2;
 216         char *data;
 217         int32 i;
 218         char *map = NULL;
 219
 220         read_sum_head(f_in, &sum);
 221
 222         if (fd_r >= 0 && size_r > 0) {
 223                 int32 read_size = MAX(sum.blength * 2, 16*1024);
 224                 mapbuf = map_file(fd_r, size_r, read_size, sum.blength);
 225                 if (DEBUG_GTE(DELTASUM, 2)) {
 226                         rprintf(FINFO, "recv mapped %s of size %s\n",
 227                                 fname_r, big_num(size_r));
 228                 }
 229         } else
 230                 mapbuf = NULL;
 231
 232         sum_init(checksum_seed);
 233
 234         if (append_mode > 0) {
 235                 OFF_T j;
 236                 sum.flength = (OFF_T)sum.count * sum.blength;
 237                 if (sum.remainder)
 238                         sum.flength -= sum.blength - sum.remainder;
 239                 if (append_mode == 2 && mapbuf) {
 240                         for (j = CHUNK_SIZE; j < sum.flength; j += CHUNK_SIZE) {
 241                                 if (INFO_GTE(PROGRESS, 1))
 242                                         show_progress(offset, total_size);
 243                                 sum_update(map_ptr(mapbuf, offset, CHUNK_SIZE),
 244                                            CHUNK_SIZE);
 245                                 offset = j;
 246                         }
 247                         if (offset < sum.flength) {
 248                                 int32 len = (int32)(sum.flength - offset);
 249                                 if (INFO_GTE(PROGRESS, 1))
 250                                         show_progress(offset, total_size);
 251                                 sum_update(map_ptr(mapbuf, offset, len), len);
 252                         }
 253                 }
 254                 offset = sum.flength;
 255                 if (fd != -1 && (j = do_lseek(fd, offset, SEEK_SET)) != offset) {
 256                         rsyserr(FERROR_XFER, errno, "lseek of %s returned %s, not %s",
 257                                 full_fname(fname), big_num(j), big_num(offset));
 258                         exit_cleanup(RERR_FILEIO);
 259                 }
 260         }
 261
 262         while ((i = recv_token(f_in, &data)) != 0) {
 263                 if (INFO_GTE(PROGRESS, 1))
 264                         show_progress(offset, total_size);
 265
 266                 if (allowed_lull)
 267                         maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH | MSK_ACTIVE_RECEIVER);
 268
 269                 if (i > 0) {
 270                         if (DEBUG_GTE(DELTASUM, 3)) {
 271                                 rprintf(FINFO,"data recv %d at %s\n",
 272                                         i, big_num(offset));
 273                         }
 274
 275                         stats.literal_data += i;
 276                         cleanup_got_literal = 1;
 277
 278                         sum_update(data, i);
 279
 280                         if (fd != -1 && write_file(fd,data,i) != i)
 281                                 goto report_write_error;
 282                         offset += i;
 283                         continue;
 284                 }
 285
 286                 i = -(i+1);
 287                 offset2 = i * (OFF_T)sum.blength;
 288                 len = sum.blength;
 289                 if (i == (int)sum.count-1 && sum.remainder != 0)
 290                         len = sum.remainder;
 291
 292                 stats.matched_data += len;
 293
 294                 if (DEBUG_GTE(DELTASUM, 3)) {
 295                         rprintf(FINFO,
 296                                 "chunk[%d] of size %ld at %s offset=%s%s\n",
 297                                 i, (long)len, big_num(offset2), big_num(offset),
 298                                 updating_basis_or_equiv && offset == offset2 ? " (seek)" : "");
 299                 }
 300
 301                 if (mapbuf) {
 302                         map = map_ptr(mapbuf,offset2,len);
 303
 304                         see_token(map, len);
 305                         sum_update(map, len);
 306                 }
 307
 308                 if (updating_basis_or_equiv) {
 309                         if (offset == offset2 && fd != -1) {
 310                                 OFF_T pos;
 311                                 if (flush_write_file(fd) < 0)
 312                                         goto report_write_error;
 313                                 offset += len;
 314                                 if ((pos = do_lseek(fd, len, SEEK_CUR)) != offset) {
 315                                         rsyserr(FERROR_XFER, errno,
 316                                                 "lseek of %s returned %s, not %s",
 317                                                 full_fname(fname),
 318                                                 big_num(pos), big_num(offset));
 319                                         exit_cleanup(RERR_FILEIO);
 320                                 }
 321                                 continue;
 322                         }
 323                 }
 324                 if (fd != -1 && map && write_file(fd, map, len) != (int)len)
 325                         goto report_write_error;
 326                 offset += len;
 327         }
 328
 329         if (flush_write_file(fd) < 0)
 330                 goto report_write_error;
 331
 332 #ifdef HAVE_FTRUNCATE
 333         if (inplace && fd != -1 && do_ftruncate(fd, offset) < 0) {
 334                 rsyserr(FERROR_XFER, errno, "ftruncate failed on %s",
 335                         full_fname(fname));
 336         }
 337 #endif
 338
 339         if (INFO_GTE(PROGRESS, 1))
 340                 end_progress(total_size);
 341
 342         if (fd != -1 && offset > 0 && sparse_end(fd, offset) != 0) {
 343             report_write_error:
 344                 rsyserr(FERROR_XFER, errno, "write failed on %s",
 345                         full_fname(fname));
 346                 exit_cleanup(RERR_FILEIO);
 347         }
 348
 349         if (sum_end(file_sum1) != checksum_len)
 350                 overflow_exit("checksum_len"); /* Impossible... */
 351
 352         if (mapbuf)
 353                 unmap_file(mapbuf);
 354
 355         read_buf(f_in, sender_file_sum, checksum_len);
 356         if (DEBUG_GTE(DELTASUM, 2))
 357                 rprintf(FINFO,"got file_sum\n");
 358         if (fd != -1 && memcmp(file_sum1, sender_file_sum, checksum_len) != 0)
 359                 return 0;
 360         return 1;
 361 }
 362
 363
 364 static void discard_receive_data(int f_in, OFF_T length)
 365 {
 366         receive_data(f_in, NULL, -1, 0, NULL, -1, length);
 367 }
 368
 369 static void handle_delayed_updates(char *local_name)
 370 {
 371         char *fname, *partialptr;
 372         int ndx;
 373
 374         for (ndx = -1; (ndx = bitbag_next_bit(delayed_bits, ndx)) >= 0; ) {
 375                 struct file_struct *file = cur_flist->files[ndx];
 376                 fname = local_name ? local_name : f_name(file, NULL);
 377                 if ((partialptr = partial_dir_fname(fname)) != NULL) {
 378                         if (make_backups > 0 && !make_backup(fname, False))
 379                                 continue;
 380                         if (DEBUG_GTE(RECV, 1)) {
 381                                 rprintf(FINFO, "renaming %s to %s\n",
 382                                         partialptr, fname);
 383                         }
 384                         /* We don't use robust_rename() here because the
 385                          * partial-dir must be on the same drive. */
 386                         if (do_rename(partialptr, fname) < 0) {
 387                                 rsyserr(FERROR_XFER, errno,
 388                                         "rename failed for %s (from %s)",
 389                                         full_fname(fname), partialptr);
 390                         } else {
 391                                 if (remove_source_files
 392                                  || (preserve_hard_links && F_IS_HLINKED(file)))
 393                                         send_msg_int(MSG_SUCCESS, ndx);
 394                                 handle_partial_dir(partialptr, PDIR_DELETE);
 395                         }
 396                 }
 397         }
 398 }
 399
 400 static void no_batched_update(int ndx, BOOL is_redo)
 401 {
 402         struct file_list *flist = flist_for_ndx(ndx, "no_batched_update");
 403         struct file_struct *file = flist->files[ndx - flist->ndx_start];
 404
 405         rprintf(FERROR_XFER, "(No batched update for%s \"%s\")\n",
 406                 is_redo ? " resend of" : "", f_name(file, NULL));
 407
 408         if (inc_recurse && !dry_run)
 409                 send_msg_int(MSG_NO_SEND, ndx);
 410 }
 411
 412 static int we_want_redo(int desired_ndx)
 413 {
 414         static int redo_ndx = -1;
 415
 416         while (redo_ndx < desired_ndx) {
 417                 if (redo_ndx >= 0)
 418                         no_batched_update(redo_ndx, True);
 419                 if ((redo_ndx = flist_ndx_pop(&batch_redo_list)) < 0)
 420                         return 0;
 421         }
 422
 423         if (redo_ndx == desired_ndx) {
 424                 redo_ndx = -1;
 425                 return 1;
 426         }
 427
 428         return 0;
 429 }
 430
 431 static int gen_wants_ndx(int desired_ndx, int flist_num)
 432 {
 433         static int next_ndx = -1;
 434         static int done_cnt = 0;
 435         static BOOL got_eof = False;
 436
 437         if (got_eof)
 438                 return 0;
 439
 440         /* TODO: integrate gen-reading I/O into perform_io() so this is not needed? */
 441         io_flush(FULL_FLUSH);
 442
 443         while (next_ndx < desired_ndx) {
 444                 if (inc_recurse && flist_num <= done_cnt)
 445                         return 0;
 446                 if (next_ndx >= 0)
 447                         no_batched_update(next_ndx, False);
 448                 if ((next_ndx = read_int(batch_gen_fd)) < 0) {
 449                         if (inc_recurse) {
 450                                 done_cnt++;
 451                                 continue;
 452                         }
 453                         got_eof = True;
 454                         return 0;
 455                 }
 456         }
 457
 458         if (next_ndx == desired_ndx) {
 459                 next_ndx = -1;
 460                 return 1;
 461         }
 462
 463         return 0;
 464 }
 465
 466 /**
 467  * main routine for receiver process.
 468  *
 469  * Receiver process runs on the same host as the generator process. */
 470 int recv_files(int f_in, int f_out, char *local_name)
 471 {
 472         int fd1,fd2;
 473         STRUCT_STAT st;
 474         int iflags, xlen;
 475         char *fname, fbuf[MAXPATHLEN];
 476         char xname[MAXPATHLEN];
 477         char fnametmp[MAXPATHLEN];
 478         char *fnamecmp, *partialptr;
 479         char fnamecmpbuf[MAXPATHLEN];
 480         uchar fnamecmp_type;
 481         struct file_struct *file;
 482         int itemizing = am_server ? logfile_format_has_i : stdout_format_has_i;
 483         enum logcode log_code = log_before_transfer ? FLOG : FINFO;
 484         int max_phase = protocol_version >= 29 ? 2 : 1;
 485         int dflt_perms = (ACCESSPERMS & ~orig_umask);
 486 #ifdef SUPPORT_ACLS
 487         const char *parent_dirname = "";
 488 #endif
 489         int ndx, recv_ok;
 490
 491         if (DEBUG_GTE(RECV, 1))
 492                 rprintf(FINFO, "recv_files(%d) starting\n", cur_flist->used);
 493
 494         if (delay_updates)
 495                 delayed_bits = bitbag_create(cur_flist->used + 1);
 496
 497         while (1) {
 498                 cleanup_disable();
 499
 500                 /* This call also sets cur_flist. */
 501                 ndx = read_ndx_and_attrs(f_in, f_out, &iflags, &fnamecmp_type,
 502                                          xname, &xlen);
 503                 if (ndx == NDX_DONE) {
 504                         if (!am_server && INFO_GTE(PROGRESS, 2) && cur_flist) {
 505                                 set_current_file_index(NULL, 0);
 506                                 end_progress(0);
 507                         }
 508                         if (inc_recurse && first_flist) {
 509                                 if (read_batch) {
 510                                         ndx = first_flist->used + first_flist->ndx_start;
 511                                         gen_wants_ndx(ndx, first_flist->flist_num);
 512                                 }
 513                                 flist_free(first_flist);
 514                                 if (first_flist)
 515                                         continue;
 516                         } else if (read_batch && first_flist) {
 517                                 ndx = first_flist->used;
 518                                 gen_wants_ndx(ndx, first_flist->flist_num);
 519                         }
 520                         if (++phase > max_phase)
 521                                 break;
 522                         if (DEBUG_GTE(RECV, 1))
 523                                 rprintf(FINFO, "recv_files phase=%d\n", phase);
 524                         if (phase == 2 && delay_updates)
 525                                 handle_delayed_updates(local_name);
 526                         write_int(f_out, NDX_DONE);
 527                         continue;
 528                 }
 529
 530                 if (ndx - cur_flist->ndx_start >= 0)
 531                         file = cur_flist->files[ndx - cur_flist->ndx_start];
 532                 else
 533                         file = dir_flist->files[cur_flist->parent_ndx];
 534                 fname = local_name ? local_name : f_name(file, fbuf);
 535
 536                 if (DEBUG_GTE(RECV, 1))
 537                         rprintf(FINFO, "recv_files(%s)\n", fname);
 538
 539 #ifdef SUPPORT_XATTRS
 540                 if (iflags & ITEM_REPORT_XATTR && do_xfers)
 541                         recv_xattr_request(file, f_in);
 542 #endif
 543
 544                 if (!(iflags & ITEM_TRANSFER)) {
 545                         maybe_log_item(file, iflags, itemizing, xname);
 546 #ifdef SUPPORT_XATTRS
 547                         if (preserve_xattrs && iflags & ITEM_REPORT_XATTR && do_xfers)
 548                                 set_file_attrs(fname, file, NULL, fname, 0);
 549 #endif
 550                         if (iflags & ITEM_IS_NEW) {
 551                                 stats.created_files++;
 552                                 if (S_ISREG(file->mode)) {
 553                                         /* Nothing further to count. */
 554                                 } else if (S_ISDIR(file->mode))
 555                                         stats.created_dirs++;
 556 #ifdef SUPPORT_LINKS
 557                                 else if (S_ISLNK(file->mode))
 558                                         stats.created_symlinks++;
 559 #endif
 560                                 else if (IS_DEVICE(file->mode))
 561                                         stats.created_devices++;
 562                                 else
 563                                         stats.created_specials++;
 564                         }
 565                         continue;
 566                 }
 567                 if (phase == 2) {
 568                         rprintf(FERROR,
 569                                 "got transfer request in phase 2 [%s]\n",
 570                                 who_am_i());
 571                         exit_cleanup(RERR_PROTOCOL);
 572                 }
 573
 574                 if (file->flags & FLAG_FILE_SENT) {
 575                         if (csum_length == SHORT_SUM_LENGTH) {
 576                                 if (keep_partial && !partial_dir)
 577                                         make_backups = -make_backups; /* prevents double backup */
 578                                 if (append_mode)
 579                                         sparse_files = -sparse_files;
 580                                 append_mode = -append_mode;
 581                                 csum_length = SUM_LENGTH;
 582                                 redoing = 1;
 583                         }
 584                 } else {
 585                         if (csum_length != SHORT_SUM_LENGTH) {
 586                                 if (keep_partial && !partial_dir)
 587                                         make_backups = -make_backups;
 588                                 if (append_mode)
 589                                         sparse_files = -sparse_files;
 590                                 append_mode = -append_mode;
 591                                 csum_length = SHORT_SUM_LENGTH;
 592                                 redoing = 0;
 593                         }
 594                         if (iflags & ITEM_IS_NEW)
 595                                 stats.created_files++;
 596                 }
 597
 598                 if (!am_server && INFO_GTE(PROGRESS, 1))
 599                         set_current_file_index(file, ndx);
 600                 stats.xferred_files++;
 601                 stats.total_transferred_size += F_LENGTH(file);
 602
 603                 cleanup_got_literal = 0;
 604
 605                 if (daemon_filter_list.head
 606                     && check_filter(&daemon_filter_list, FLOG, fname, 0) < 0) {
 607                         rprintf(FERROR, "attempt to hack rsync failed.\n");
 608                         exit_cleanup(RERR_PROTOCOL);
 609                 }
 610
 611                 if (read_batch) {
 612                         int wanted = redoing
 613                                    ? we_want_redo(ndx)
 614                                    : gen_wants_ndx(ndx, cur_flist->flist_num);
 615                         if (!wanted) {
 616                                 rprintf(FINFO,
 617                                         "(Skipping batched update for%s \"%s\")\n",
 618                                         redoing ? " resend of" : "",
 619                                         fname);
 620                                 discard_receive_data(f_in, F_LENGTH(file));
 621                                 file->flags |= FLAG_FILE_SENT;
 622                                 continue;
 623                         }
 624                 }
 625
 626                 if (!log_before_transfer)
 627                         remember_initial_stats();
 628
 629                 if (!do_xfers) { /* log the transfer */
 630                         log_item(FCLIENT, file, iflags, NULL);
 631                         if (read_batch)
 632                                 discard_receive_data(f_in, F_LENGTH(file));
 633                         continue;
 634                 }
 635                 if (write_batch < 0) {
 636                         log_item(FCLIENT, file, iflags, NULL);
 637                         if (!am_server)
 638                                 discard_receive_data(f_in, F_LENGTH(file));
 639                         continue;
 640                 }
 641
 642                 partialptr = partial_dir ? partial_dir_fname(fname) : fname;
 643
 644                 if (protocol_version >= 29) {
 645                         switch (fnamecmp_type) {
 646                         case FNAMECMP_FNAME:
 647                                 fnamecmp = fname;
 648                                 break;
 649                         case FNAMECMP_PARTIAL_DIR:
 650                                 fnamecmp = partialptr;
 651                                 break;
 652                         case FNAMECMP_BACKUP:
 653                                 fnamecmp = get_backup_name(fname);
 654                                 break;
 655                         case FNAMECMP_FUZZY:
 656                                 if (file->dirname) {
 657                                         pathjoin(fnamecmpbuf, MAXPATHLEN,
 658                                                  file->dirname, xname);
 659                                         fnamecmp = fnamecmpbuf;
 660                                 } else
 661                                         fnamecmp = xname;
 662                                 break;
 663                         default:
 664                                 if (fnamecmp_type >= basis_dir_cnt) {
 665                                         rprintf(FERROR,
 666                                                 "invalid basis_dir index: %d.\n",
 667                                                 fnamecmp_type);
 668                                         exit_cleanup(RERR_PROTOCOL);
 669                                 }
 670                                 pathjoin(fnamecmpbuf, sizeof fnamecmpbuf,
 671                                          basis_dir[fnamecmp_type], fname);
 672                                 fnamecmp = fnamecmpbuf;
 673                                 break;
 674                         }
 675                         if (!fnamecmp || (daemon_filter_list.head
 676                           && check_filter(&daemon_filter_list, FLOG, fname, 0) < 0)) {
 677                                 fnamecmp = fname;
 678                                 fnamecmp_type = FNAMECMP_FNAME;
 679                         }
 680                 } else {
 681                         /* Reminder: --inplace && --partial-dir are never
 682                          * enabled at the same time. */
 683                         if (inplace && make_backups > 0) {
 684                                 if (!(fnamecmp = get_backup_name(fname)))
 685                                         fnamecmp = fname;
 686                                 else
 687                                         fnamecmp_type = FNAMECMP_BACKUP;
 688                         } else if (partial_dir && partialptr)
 689                                 fnamecmp = partialptr;
 690                         else
 691                                 fnamecmp = fname;
 692                 }
 693
 694                 /* open the file */
 695                 fd1 = do_open(fnamecmp, O_RDONLY, 0);
 696
 697                 if (fd1 == -1 && protocol_version < 29) {
 698                         if (fnamecmp != fname) {
 699                                 fnamecmp = fname;
 700                                 fd1 = do_open(fnamecmp, O_RDONLY, 0);
 701                         }
 702
 703                         if (fd1 == -1 && basis_dir[0]) {
 704                                 /* pre-29 allowed only one alternate basis */
 705                                 pathjoin(fnamecmpbuf, sizeof fnamecmpbuf,
 706                                          basis_dir[0], fname);
 707                                 fnamecmp = fnamecmpbuf;
 708                                 fd1 = do_open(fnamecmp, O_RDONLY, 0);
 709                         }
 710                 }
 711
 712                 updating_basis_or_equiv = inplace
 713                     && (fnamecmp == fname || fnamecmp_type == FNAMECMP_BACKUP);
 714
 715                 if (fd1 == -1) {
 716                         st.st_mode = 0;
 717                         st.st_size = 0;
 718                 } else if (do_fstat(fd1,&st) != 0) {
 719                         rsyserr(FERROR_XFER, errno, "fstat %s failed",
 720                                 full_fname(fnamecmp));
 721                         discard_receive_data(f_in, F_LENGTH(file));
 722                         close(fd1);
 723                         if (inc_recurse)
 724                                 send_msg_int(MSG_NO_SEND, ndx);
 725                         continue;
 726                 }
 727
 728                 if (fd1 != -1 && S_ISDIR(st.st_mode) && fnamecmp == fname) {
 729                         /* this special handling for directories
 730                          * wouldn't be necessary if robust_rename()
 731                          * and the underlying robust_unlink could cope
 732                          * with directories
 733                          */
 734                         rprintf(FERROR_XFER, "recv_files: %s is a directory\n",
 735                                 full_fname(fnamecmp));
 736                         discard_receive_data(f_in, F_LENGTH(file));
 737                         close(fd1);
 738                         if (inc_recurse)
 739                                 send_msg_int(MSG_NO_SEND, ndx);
 740                         continue;
 741                 }
 742
 743                 if (fd1 != -1 && !S_ISREG(st.st_mode)) {
 744                         close(fd1);
 745                         fd1 = -1;
 746                 }
 747
 748                 /* If we're not preserving permissions, change the file-list's
 749                  * mode based on the local permissions and some heuristics. */
 750                 if (!preserve_perms) {
 751                         int exists = fd1 != -1;
 752 #ifdef SUPPORT_ACLS
 753                         const char *dn = file->dirname ? file->dirname : ".";
 754                         if (parent_dirname != dn
 755                          && strcmp(parent_dirname, dn) != 0) {
 756                                 dflt_perms = default_perms_for_dir(dn);
 757                                 parent_dirname = dn;
 758                         }
 759 #endif
 760                         file->mode = dest_mode(file->mode, st.st_mode,
 761                                                dflt_perms, exists);
 762                 }
 763
 764                 /* We now check to see if we are writing the file "inplace" */
 765                 if (inplace)  {
 766                         fd2 = do_open(fname, O_WRONLY|O_CREAT, 0600);
 767                         if (fd2 == -1) {
 768                                 rsyserr(FERROR_XFER, errno, "open %s failed",
 769                                         full_fname(fname));
 770                         }
 771                 } else {
 772                         fd2 = open_tmpfile(fnametmp, fname, file);
 773                         if (fd2 != -1)
 774                                 cleanup_set(fnametmp, partialptr, file, fd1, fd2);
 775                 }
 776
 777                 if (fd2 == -1) {
 778                         discard_receive_data(f_in, F_LENGTH(file));
 779                         if (fd1 != -1)
 780                                 close(fd1);
 781                         if (inc_recurse)
 782                                 send_msg_int(MSG_NO_SEND, ndx);
 783                         continue;
 784                 }
 785
 786                 /* log the transfer */
 787                 if (log_before_transfer)
 788                         log_item(FCLIENT, file, iflags, NULL);
 789                 else if (!am_server && INFO_GTE(NAME, 1) && INFO_EQ(PROGRESS, 1))
 790                         rprintf(FINFO, "%s\n", fname);
 791
 792                 /* recv file data */
 793                 recv_ok = receive_data(f_in, fnamecmp, fd1, st.st_size,
 794                                        fname, fd2, F_LENGTH(file));
 795
 796                 log_item(log_code, file, iflags, NULL);
 797
 798                 if (fd1 != -1)
 799                         close(fd1);
 800                 if (close(fd2) < 0) {
 801                         rsyserr(FERROR, errno, "close failed on %s",
 802                                 full_fname(fnametmp));
 803                         exit_cleanup(RERR_FILEIO);
 804                 }
 805
 806                 if ((recv_ok && (!delay_updates || !partialptr)) || inplace) {
 807                         if (partialptr == fname)
 808                                 partialptr = NULL;
 809                         if (!finish_transfer(fname, fnametmp, fnamecmp,
 810                                              partialptr, file, recv_ok, 1))
 811                                 recv_ok = -1;
 812                         else if (fnamecmp == partialptr) {
 813                                 do_unlink(partialptr);
 814                                 handle_partial_dir(partialptr, PDIR_DELETE);
 815                         }
 816                 } else if (keep_partial && partialptr) {
 817                         if (!handle_partial_dir(partialptr, PDIR_CREATE)) {
 818                                 rprintf(FERROR,
 819                                     "Unable to create partial-dir for %s -- discarding %s.\n",
 820                                     local_name ? local_name : f_name(file, NULL),
 821                                     recv_ok ? "completed file" : "partial file");
 822                                 do_unlink(fnametmp);
 823                                 recv_ok = -1;
 824                         } else if (!finish_transfer(partialptr, fnametmp, fnamecmp, NULL,
 825                                                     file, recv_ok, !partial_dir))
 826                                 recv_ok = -1;
 827                         else if (delay_updates && recv_ok) {
 828                                 bitbag_set_bit(delayed_bits, ndx);
 829                                 recv_ok = 2;
 830                         } else
 831                                 partialptr = NULL;
 832                 } else
 833                         do_unlink(fnametmp);
 834
 835                 cleanup_disable();
 836
 837                 if (read_batch)
 838                         file->flags |= FLAG_FILE_SENT;
 839
 840                 switch (recv_ok) {
 841                 case 2:
 842                         break;
 843                 case 1:
 844                         if (remove_source_files || inc_recurse
 845                          || (preserve_hard_links && F_IS_HLINKED(file)))
 846                                 send_msg_int(MSG_SUCCESS, ndx);
 847                         break;
 848                 case 0: {
 849                         enum logcode msgtype = redoing ? FERROR_XFER : FWARNING;
 850                         if (msgtype == FERROR_XFER || INFO_GTE(NAME, 1)) {
 851                                 char *errstr, *redostr, *keptstr;
 852                                 if (!(keep_partial && partialptr) && !inplace)
 853                                         keptstr = "discarded";
 854                                 else if (partial_dir)
 855                                         keptstr = "put into partial-dir";
 856                                 else
 857                                         keptstr = "retained";
 858                                 if (msgtype == FERROR_XFER) {
 859                                         errstr = "ERROR";
 860                                         redostr = "";
 861                                 } else {
 862                                         errstr = "WARNING";
 863                                         redostr = read_batch ? " (may try again)"
 864                                                              : " (will try again)";
 865                                 }
 866                                 rprintf(msgtype,
 867                                         "%s: %s failed verification -- update %s%s.\n",
 868                                         errstr, local_name ? f_name(file, NULL) : fname,
 869                                         keptstr, redostr);
 870                         }
 871                         if (!redoing) {
 872                                 if (read_batch)
 873                                         flist_ndx_push(&batch_redo_list, ndx);
 874                                 send_msg_int(MSG_REDO, ndx);
 875                                 file->flags |= FLAG_FILE_SENT;
 876                         } else if (inc_recurse)
 877                                 send_msg_int(MSG_NO_SEND, ndx);
 878                         break;
 879                     }
 880                 case -1:
 881                         if (inc_recurse)
 882                                 send_msg_int(MSG_NO_SEND, ndx);
 883                         break;
 884                 }
 885         }
 886         if (make_backups < 0)
 887                 make_backups = -make_backups;
 888
 889         if (phase == 2 && delay_updates) /* for protocol_version < 29 */
 890                 handle_delayed_updates(local_name);
 891
 892         if (DEBUG_GTE(RECV, 1))
 893                 rprintf(FINFO,"recv_files finished\n");
 894
 895         return 0;
 896 }