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