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