receiver.c

   1 /*
   2  * Routines only used by the receiving process.
   3  *
   4  * Copyright (C) 1996-2000 Andrew Tridgell
   5  * Copyright (C) 1996 Paul Mackerras
   6  * Copyright (C) 2003-2019 Wayne Davison
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 3 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, visit the http://fsf.org website.
  20  */
  21
  22 #include "rsync.h"
  23 #include "inums.h"
  24
  25 extern int dry_run;
  26 extern int do_xfers;
  27 extern int am_root;
  28 extern int am_server;
  29 extern int inc_recurse;
  30 extern int log_before_transfer;
  31 extern int stdout_format_has_i;
  32 extern int logfile_format_has_i;
  33 extern int want_xattr_optim;
  34 extern int csum_length;
  35 extern int read_batch;
  36 extern int write_batch;
  37 extern int batch_gen_fd;
  38 extern int protocol_version;
  39 extern int relative_paths;
  40 extern int preserve_hard_links;
  41 extern int preserve_perms;
  42 extern int preserve_xattrs;
  43 extern int basis_dir_cnt;
  44 extern int make_backups;
  45 extern int cleanup_got_literal;
  46 extern int remove_source_files;
  47 extern int append_mode;
  48 extern int sparse_files;
  49 extern int preallocate_files;
  50 extern int keep_partial;
  51 extern int checksum_seed;
  52 extern int whole_file;
  53 extern int inplace;
  54 extern int allowed_lull;
  55 extern int delay_updates;
  56 extern int xfersum_type;
  57 extern mode_t orig_umask;
  58 extern struct stats stats;
  59 extern char *tmpdir;
  60 extern char *partial_dir;
  61 extern char *basis_dir[MAX_BASIS_DIRS+1];
  62 extern char sender_file_sum[MAX_DIGEST_LEN];
  63 extern struct file_list *cur_flist, *first_flist, *dir_flist;
  64 extern filter_rule_list daemon_filter_list;
  65 extern OFF_T preallocated_len;
  66
  67 static struct bitbag *delayed_bits = NULL;
  68 static int phase = 0, redoing = 0;
  69 static flist_ndx_list batch_redo_list;
  70 /* We're either updating the basis file or an identical copy: */
  71 static int updating_basis_or_equiv;
  72
  73 #define TMPNAME_SUFFIX ".XXXXXX"
  74 #define TMPNAME_SUFFIX_LEN ((int)sizeof TMPNAME_SUFFIX - 1)
  75 #define MAX_UNIQUE_NUMBER 999999
  76 #define MAX_UNIQUE_LOOP 100
  77
  78 /* get_tmpname() - create a tmp filename for a given filename
  79  *
  80  * If a tmpdir is defined, use that as the directory to put it in.  Otherwise,
  81  * the tmp filename is in the same directory as the given name.  Note that
  82  * there may be no directory at all in the given name!
  83  *
  84  * The tmp filename is basically the given filename with a dot prepended, and
  85  * .XXXXXX appended (for mkstemp() to put its unique gunk in).  We take care
  86  * to not exceed either the MAXPATHLEN or NAME_MAX, especially the last, as
  87  * the basename basically becomes 8 characters longer.  In such a case, the
  88  * original name is shortened sufficiently to make it all fit.
  89  *
  90  * If the make_unique arg is True, the XXXXXX string is replaced with a unique
  91  * string that doesn't exist at the time of the check.  This is intended to be
  92  * used for creating hard links, symlinks, devices, and special files, since
  93  * normal files should be handled by mkstemp() for safety.
  94  *
  95  * Of course, the only reason the file is based on the original name is to
  96  * make it easier to figure out what purpose a temp file is serving when a
  97  * transfer is in progress. */
  98 int get_tmpname(char *fnametmp, const char *fname, BOOL make_unique)
  99 {
 100         int maxname, length = 0;
 101         const char *f;
 102         char *suf;
 103
 104         if (tmpdir) {
 105                 /* Note: this can't overflow, so the return value is safe */
 106                 length = strlcpy(fnametmp, tmpdir, MAXPATHLEN - 2);
 107                 fnametmp[length++] = '/';
 108         }
 109
 110         if ((f = strrchr(fname, '/')) != NULL) {
 111                 ++f;
 112                 if (!tmpdir) {
 113                         length = f - fname;
 114                         /* copy up to and including the slash */
 115                         strlcpy(fnametmp, fname, length + 1);
 116                 }
 117         } else
 118                 f = fname;
 119
 120         if (!tmpdir) { /* using a tmpdir avoids the leading dot on our temp names */
 121                 if (*f == '.') /* avoid an extra leading dot for OS X's sake */
 122                         f++;
 123                 fnametmp[length++] = '.';
 124         }
 125
 126         /* The maxname value is bufsize, and includes space for the '\0'.
 127          * NAME_MAX needs an extra -1 for the name's leading dot. */
 128         maxname = MIN(MAXPATHLEN - length - TMPNAME_SUFFIX_LEN,
 129                       NAME_MAX - 1 - TMPNAME_SUFFIX_LEN);
 130
 131         if (maxname < 0) {
 132                 rprintf(FERROR_XFER, "temporary filename too long: %s\n", fname);
 133                 fnametmp[0] = '\0';
 134                 return 0;
 135         }
 136
 137         if (maxname) {
 138                 int added = strlcpy(fnametmp + length, f, maxname);
 139                 if (added >= maxname)
 140                         added = maxname - 1;
 141                 suf = fnametmp + length + added;
 142
 143                 /* Trim any dangling high-bit chars if the first-trimmed char (if any) is
 144                  * also a high-bit char, just in case we cut into a multi-byte sequence.
 145                  * We are guaranteed to stop because of the leading '.' we added. */
 146                 if ((int)f[added] & 0x80) {
 147                         while ((int)suf[-1] & 0x80)
 148                                 suf--;
 149                 }
 150                 /* trim one trailing dot before our suffix's dot */
 151                 if (suf[-1] == '.')
 152                         suf--;
 153         } else
 154                 suf = fnametmp + length - 1; /* overwrite the leading dot with suffix's dot */
 155
 156         if (make_unique) {
 157                 static unsigned counter_limit;
 158                 unsigned counter;
 159
 160                 if (!counter_limit) {
 161                         counter_limit = (unsigned)getpid() + MAX_UNIQUE_LOOP;
 162                         if (counter_limit > MAX_UNIQUE_NUMBER || counter_limit < MAX_UNIQUE_LOOP)
 163                                 counter_limit = MAX_UNIQUE_LOOP;
 164                 }
 165                 counter = counter_limit - MAX_UNIQUE_LOOP;
 166
 167                 /* This doesn't have to be very good because we don't need
 168                  * to worry about someone trying to guess the values:  all
 169                  * a conflict will do is cause a device, special file, hard
 170                  * link, or symlink to fail to be created.  Also: avoid
 171                  * using mktemp() due to gcc's annoying warning. */
 172                 while (1) {
 173                         snprintf(suf, TMPNAME_SUFFIX_LEN+1, ".%d", counter);
 174                         if (access(fnametmp, 0) < 0)
 175                                 break;
 176                         if (++counter >= counter_limit)
 177                                 return 0;
 178                 }
 179         } else
 180                 memcpy(suf, TMPNAME_SUFFIX, TMPNAME_SUFFIX_LEN+1);
 181
 182         return 1;
 183 }
 184
 185 /* Opens a temporary file for writing.
 186  * Success: Writes name into fnametmp, returns fd.
 187  * Failure: Clobbers fnametmp, returns -1.
 188  * Calling cleanup_set() is the caller's job. */
 189 int open_tmpfile(char *fnametmp, const char *fname, struct file_struct *file)
 190 {
 191         int fd;
 192         mode_t added_perms;
 193
 194         if (!get_tmpname(fnametmp, fname, False))
 195                 return -1;
 196
 197         if (am_root < 0) {
 198                 /* For --fake-super, the file must be useable by the copying
 199                  * user, just like it would be for root. */
 200                 added_perms = S_IRUSR|S_IWUSR;
 201         } else {
 202                 /* For a normal copy, we need to be able to tweak things like xattrs. */
 203                 added_perms = S_IWUSR;
 204         }
 205
 206         /* We initially set the perms without the setuid/setgid bits or group
 207          * access to ensure that there is no race condition.  They will be
 208          * correctly updated after the right owner and group info is set.
 209          * (Thanks to snabb@epipe.fi for pointing this out.) */
 210         fd = do_mkstemp(fnametmp, (file->mode|added_perms) & INITACCESSPERMS);
 211
 212 #if 0
 213         /* In most cases parent directories will already exist because their
 214          * information should have been previously transferred, but that may
 215          * not be the case with -R */
 216         if (fd == -1 && relative_paths && errno == ENOENT
 217          && make_path(fnametmp, MKP_SKIP_SLASH | MKP_DROP_NAME) == 0) {
 218                 /* Get back to name with XXXXXX in it. */
 219                 get_tmpname(fnametmp, fname, False);
 220                 fd = do_mkstemp(fnametmp, (file->mode|added_perms) & INITACCESSPERMS);
 221         }
 222 #endif
 223
 224         if (fd == -1) {
 225                 rsyserr(FERROR_XFER, errno, "mkstemp %s failed",
 226                         full_fname(fnametmp));
 227                 return -1;
 228         }
 229
 230         return fd;
 231 }
 232
 233 static int receive_data(int f_in, char *fname_r, int fd_r, OFF_T size_r,
 234                         const char *fname, int fd, OFF_T total_size)
 235 {
 236         static char file_sum1[MAX_DIGEST_LEN];
 237         struct map_struct *mapbuf;
 238         struct sum_struct sum;
 239         int sum_len;
 240         int32 len;
 241         OFF_T offset = 0;
 242         OFF_T offset2;
 243         char *data;
 244         int32 i;
 245         char *map = NULL;
 246
 247 #ifdef SUPPORT_PREALLOCATION
 248         if (preallocate_files && fd != -1 && total_size > 0 && (!inplace || total_size > size_r)) {
 249                 /* Try to preallocate enough space for file's eventual length.  Can
 250                  * reduce fragmentation on filesystems like ext4, xfs, and NTFS. */
 251                 if ((preallocated_len = do_fallocate(fd, 0, total_size)) < 0)
 252                         rsyserr(FWARNING, errno, "do_fallocate %s", full_fname(fname));
 253         } else
 254 #endif
 255         if (inplace) {
 256 #ifdef HAVE_FTRUNCATE
 257                 /* The most compatible way to create a sparse file is to start with no length. */
 258                 if (sparse_files > 0 && whole_file && fd >= 0 && do_ftruncate(fd, 0) == 0)
 259                         preallocated_len = 0;
 260                 else
 261 #endif
 262                         preallocated_len = size_r;
 263         } else
 264                 preallocated_len = 0;
 265
 266         read_sum_head(f_in, &sum);
 267
 268         if (fd_r >= 0 && size_r > 0) {
 269                 int32 read_size = MAX(sum.blength * 2, 16*1024);
 270                 mapbuf = map_file(fd_r, size_r, read_size, sum.blength);
 271                 if (DEBUG_GTE(DELTASUM, 2)) {
 272                         rprintf(FINFO, "recv mapped %s of size %s\n",
 273                                 fname_r, big_num(size_r));
 274                 }
 275         } else
 276                 mapbuf = NULL;
 277
 278         sum_init(xfersum_type, checksum_seed);
 279
 280         if (append_mode > 0) {
 281                 OFF_T j;
 282                 sum.flength = (OFF_T)sum.count * sum.blength;
 283                 if (sum.remainder)
 284                         sum.flength -= sum.blength - sum.remainder;
 285                 if (append_mode == 2 && mapbuf) {
 286                         for (j = CHUNK_SIZE; j < sum.flength; j += CHUNK_SIZE) {
 287                                 if (INFO_GTE(PROGRESS, 1))
 288                                         show_progress(offset, total_size);
 289                                 sum_update(map_ptr(mapbuf, offset, CHUNK_SIZE),
 290                                            CHUNK_SIZE);
 291                                 offset = j;
 292                         }
 293                         if (offset < sum.flength) {
 294                                 int32 len = (int32)(sum.flength - offset);
 295                                 if (INFO_GTE(PROGRESS, 1))
 296                                         show_progress(offset, total_size);
 297                                 sum_update(map_ptr(mapbuf, offset, len), len);
 298                         }
 299                 }
 300                 offset = sum.flength;
 301                 if (fd != -1 && (j = do_lseek(fd, offset, SEEK_SET)) != offset) {
 302                         rsyserr(FERROR_XFER, errno, "lseek of %s returned %s, not %s",
 303                                 full_fname(fname), big_num(j), big_num(offset));
 304                         exit_cleanup(RERR_FILEIO);
 305                 }
 306         }
 307
 308         while ((i = recv_token(f_in, &data)) != 0) {
 309                 if (INFO_GTE(PROGRESS, 1))
 310                         show_progress(offset, total_size);
 311
 312                 if (allowed_lull)
 313                         maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH | MSK_ACTIVE_RECEIVER);
 314
 315                 if (i > 0) {
 316                         if (DEBUG_GTE(DELTASUM, 3)) {
 317                                 rprintf(FINFO,"data recv %d at %s\n",
 318                                         i, big_num(offset));
 319                         }
 320
 321                         stats.literal_data += i;
 322                         cleanup_got_literal = 1;
 323
 324                         sum_update(data, i);
 325
 326                         if (fd != -1 && write_file(fd, 0, offset, data, i) != i)
 327                                 goto report_write_error;
 328                         offset += i;
 329                         continue;
 330                 }
 331
 332                 i = -(i+1);
 333                 offset2 = i * (OFF_T)sum.blength;
 334                 len = sum.blength;
 335                 if (i == (int)sum.count-1 && sum.remainder != 0)
 336                         len = sum.remainder;
 337
 338                 stats.matched_data += len;
 339
 340                 if (DEBUG_GTE(DELTASUM, 3)) {
 341                         rprintf(FINFO,
 342                                 "chunk[%d] of size %ld at %s offset=%s%s\n",
 343                                 i, (long)len, big_num(offset2), big_num(offset),
 344                                 updating_basis_or_equiv && offset == offset2 ? " (seek)" : "");
 345                 }
 346
 347                 if (mapbuf) {
 348                         map = map_ptr(mapbuf,offset2,len);
 349
 350                         see_token(map, len);
 351                         sum_update(map, len);
 352                 }
 353
 354                 if (updating_basis_or_equiv) {
 355                         if (offset == offset2 && fd != -1) {
 356                                 if (skip_matched(fd, offset, map, len) < 0)
 357                                         goto report_write_error;
 358                                 offset += len;
 359                                 continue;
 360                         }
 361                 }
 362                 if (fd != -1 && map && write_file(fd, 0, offset, map, len) != (int)len)
 363                         goto report_write_error;
 364                 offset += len;
 365         }
 366
 367         if (fd != -1 && offset > 0) {
 368                 if (sparse_files > 0) {
 369                         if (sparse_end(fd, offset) != 0)
 370                                 goto report_write_error;
 371                 } else if (flush_write_file(fd) < 0) {
 372                     report_write_error:
 373                         rsyserr(FERROR_XFER, errno, "write failed on %s", full_fname(fname));
 374                         exit_cleanup(RERR_FILEIO);
 375                 }
 376         }
 377
 378 #ifdef HAVE_FTRUNCATE
 379         /* inplace: New data could be shorter than old data.
 380          * preallocate_files: total_size could have been an overestimate.
 381          *     Cut off any extra preallocated zeros from dest file. */
 382         if ((inplace || preallocated_len > offset) && fd != -1 && do_ftruncate(fd, offset) < 0) {
 383                 rsyserr(FERROR_XFER, errno, "ftruncate failed on %s",
 384                         full_fname(fname));
 385         }
 386 #endif
 387
 388         if (INFO_GTE(PROGRESS, 1))
 389                 end_progress(total_size);
 390
 391         sum_len = sum_end(file_sum1);
 392
 393         if (mapbuf)
 394                 unmap_file(mapbuf);
 395
 396         read_buf(f_in, sender_file_sum, sum_len);
 397         if (DEBUG_GTE(DELTASUM, 2))
 398                 rprintf(FINFO,"got file_sum\n");
 399         if (fd != -1 && memcmp(file_sum1, sender_file_sum, sum_len) != 0)
 400                 return 0;
 401         return 1;
 402 }
 403
 404
 405 static void discard_receive_data(int f_in, OFF_T length)
 406 {
 407         receive_data(f_in, NULL, -1, 0, NULL, -1, length);
 408 }
 409
 410 static void handle_delayed_updates(char *local_name)
 411 {
 412         char *fname, *partialptr;
 413         int ndx;
 414
 415         for (ndx = -1; (ndx = bitbag_next_bit(delayed_bits, ndx)) >= 0; ) {
 416                 struct file_struct *file = cur_flist->files[ndx];
 417                 fname = local_name ? local_name : f_name(file, NULL);
 418                 if ((partialptr = partial_dir_fname(fname)) != NULL) {
 419                         if (make_backups > 0 && !make_backup(fname, False))
 420                                 continue;
 421                         if (DEBUG_GTE(RECV, 1)) {
 422                                 rprintf(FINFO, "renaming %s to %s\n",
 423                                         partialptr, fname);
 424                         }
 425                         /* We don't use robust_rename() here because the
 426                          * partial-dir must be on the same drive. */
 427                         if (do_rename(partialptr, fname) < 0) {
 428                                 rsyserr(FERROR_XFER, errno,
 429                                         "rename failed for %s (from %s)",
 430                                         full_fname(fname), partialptr);
 431                         } else {
 432                                 if (remove_source_files
 433                                  || (preserve_hard_links && F_IS_HLINKED(file)))
 434                                         send_msg_int(MSG_SUCCESS, ndx);
 435                                 handle_partial_dir(partialptr, PDIR_DELETE);
 436                         }
 437                 }
 438         }
 439 }
 440
 441 static void no_batched_update(int ndx, BOOL is_redo)
 442 {
 443         struct file_list *flist = flist_for_ndx(ndx, "no_batched_update");
 444         struct file_struct *file = flist->files[ndx - flist->ndx_start];
 445
 446         rprintf(FERROR_XFER, "(No batched update for%s \"%s\")\n",
 447                 is_redo ? " resend of" : "", f_name(file, NULL));
 448
 449         if (inc_recurse && !dry_run)
 450                 send_msg_int(MSG_NO_SEND, ndx);
 451 }
 452
 453 static int we_want_redo(int desired_ndx)
 454 {
 455         static int redo_ndx = -1;
 456
 457         while (redo_ndx < desired_ndx) {
 458                 if (redo_ndx >= 0)
 459                         no_batched_update(redo_ndx, True);
 460                 if ((redo_ndx = flist_ndx_pop(&batch_redo_list)) < 0)
 461                         return 0;
 462         }
 463
 464         if (redo_ndx == desired_ndx) {
 465                 redo_ndx = -1;
 466                 return 1;
 467         }
 468
 469         return 0;
 470 }
 471
 472 static int gen_wants_ndx(int desired_ndx, int flist_num)
 473 {
 474         static int next_ndx = -1;
 475         static int done_cnt = 0;
 476         static BOOL got_eof = False;
 477
 478         if (got_eof)
 479                 return 0;
 480
 481         /* TODO: integrate gen-reading I/O into perform_io() so this is not needed? */
 482         io_flush(FULL_FLUSH);
 483
 484         while (next_ndx < desired_ndx) {
 485                 if (inc_recurse && flist_num <= done_cnt)
 486                         return 0;
 487                 if (next_ndx >= 0)
 488                         no_batched_update(next_ndx, False);
 489                 if ((next_ndx = read_int(batch_gen_fd)) < 0) {
 490                         if (inc_recurse) {
 491                                 done_cnt++;
 492                                 continue;
 493                         }
 494                         got_eof = True;
 495                         return 0;
 496                 }
 497         }
 498
 499         if (next_ndx == desired_ndx) {
 500                 next_ndx = -1;
 501                 return 1;
 502         }
 503
 504         return 0;
 505 }
 506
 507 /**
 508  * main routine for receiver process.
 509  *
 510  * Receiver process runs on the same host as the generator process. */
 511 int recv_files(int f_in, int f_out, char *local_name)
 512 {
 513         int fd1,fd2;
 514         STRUCT_STAT st;
 515         int iflags, xlen;
 516         char *fname, fbuf[MAXPATHLEN];
 517         char xname[MAXPATHLEN];
 518         char fnametmp[MAXPATHLEN];
 519         char *fnamecmp, *partialptr;
 520         char fnamecmpbuf[MAXPATHLEN];
 521         uchar fnamecmp_type;
 522         struct file_struct *file;
 523         int itemizing = am_server ? logfile_format_has_i : stdout_format_has_i;
 524         enum logcode log_code = log_before_transfer ? FLOG : FINFO;
 525         int max_phase = protocol_version >= 29 ? 2 : 1;
 526         int dflt_perms = (ACCESSPERMS & ~orig_umask);
 527 #ifdef SUPPORT_ACLS
 528         const char *parent_dirname = "";
 529 #endif
 530         int ndx, recv_ok;
 531
 532         if (DEBUG_GTE(RECV, 1))
 533                 rprintf(FINFO, "recv_files(%d) starting\n", cur_flist->used);
 534
 535         if (delay_updates)
 536                 delayed_bits = bitbag_create(cur_flist->used + 1);
 537
 538         while (1) {
 539                 cleanup_disable();
 540
 541                 /* This call also sets cur_flist. */
 542                 ndx = read_ndx_and_attrs(f_in, f_out, &iflags, &fnamecmp_type,
 543                                          xname, &xlen);
 544                 if (ndx == NDX_DONE) {
 545                         if (!am_server && INFO_GTE(PROGRESS, 2) && cur_flist) {
 546                                 set_current_file_index(NULL, 0);
 547                                 end_progress(0);
 548                         }
 549                         if (inc_recurse && first_flist) {
 550                                 if (read_batch) {
 551                                         ndx = first_flist->used + first_flist->ndx_start;
 552                                         gen_wants_ndx(ndx, first_flist->flist_num);
 553                                 }
 554                                 flist_free(first_flist);
 555                                 if (first_flist)
 556                                         continue;
 557                         } else if (read_batch && first_flist) {
 558                                 ndx = first_flist->used;
 559                                 gen_wants_ndx(ndx, first_flist->flist_num);
 560                         }
 561                         if (++phase > max_phase)
 562                                 break;
 563                         if (DEBUG_GTE(RECV, 1))
 564                                 rprintf(FINFO, "recv_files phase=%d\n", phase);
 565                         if (phase == 2 && delay_updates)
 566                                 handle_delayed_updates(local_name);
 567                         write_int(f_out, NDX_DONE);
 568                         continue;
 569                 }
 570
 571                 if (ndx - cur_flist->ndx_start >= 0)
 572                         file = cur_flist->files[ndx - cur_flist->ndx_start];
 573                 else
 574                         file = dir_flist->files[cur_flist->parent_ndx];
 575                 fname = local_name ? local_name : f_name(file, fbuf);
 576
 577                 if (DEBUG_GTE(RECV, 1))
 578                         rprintf(FINFO, "recv_files(%s)\n", fname);
 579
 580                 if (daemon_filter_list.head && (*fname != '.' || fname[1] != '\0')
 581                  && check_filter(&daemon_filter_list, FLOG, fname, 0) < 0) {
 582                         rprintf(FERROR, "attempt to hack rsync failed.\n");
 583                         exit_cleanup(RERR_PROTOCOL);
 584                 }
 585
 586 #ifdef SUPPORT_XATTRS
 587                 if (preserve_xattrs && iflags & ITEM_REPORT_XATTR && do_xfers
 588                  && !(want_xattr_optim && BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE)))
 589                         recv_xattr_request(file, f_in);
 590 #endif
 591
 592                 if (!(iflags & ITEM_TRANSFER)) {
 593                         maybe_log_item(file, iflags, itemizing, xname);
 594 #ifdef SUPPORT_XATTRS
 595                         if (preserve_xattrs && iflags & ITEM_REPORT_XATTR && do_xfers
 596                          && !BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE))
 597                                 set_file_attrs(fname, file, NULL, fname, 0);
 598 #endif
 599                         if (iflags & ITEM_IS_NEW) {
 600                                 stats.created_files++;
 601                                 if (S_ISREG(file->mode)) {
 602                                         /* Nothing further to count. */
 603                                 } else if (S_ISDIR(file->mode))
 604                                         stats.created_dirs++;
 605 #ifdef SUPPORT_LINKS
 606                                 else if (S_ISLNK(file->mode))
 607                                         stats.created_symlinks++;
 608 #endif
 609                                 else if (IS_DEVICE(file->mode))
 610                                         stats.created_devices++;
 611                                 else
 612                                         stats.created_specials++;
 613                         }
 614                         continue;
 615                 }
 616                 if (phase == 2) {
 617                         rprintf(FERROR,
 618                                 "got transfer request in phase 2 [%s]\n",
 619                                 who_am_i());
 620                         exit_cleanup(RERR_PROTOCOL);
 621                 }
 622
 623                 if (file->flags & FLAG_FILE_SENT) {
 624                         if (csum_length == SHORT_SUM_LENGTH) {
 625                                 if (keep_partial && !partial_dir)
 626                                         make_backups = -make_backups; /* prevents double backup */
 627                                 if (append_mode)
 628                                         sparse_files = -sparse_files;
 629                                 append_mode = -append_mode;
 630                                 csum_length = SUM_LENGTH;
 631                                 redoing = 1;
 632                         }
 633                 } else {
 634                         if (csum_length != SHORT_SUM_LENGTH) {
 635                                 if (keep_partial && !partial_dir)
 636                                         make_backups = -make_backups;
 637                                 if (append_mode)
 638                                         sparse_files = -sparse_files;
 639                                 append_mode = -append_mode;
 640                                 csum_length = SHORT_SUM_LENGTH;
 641                                 redoing = 0;
 642                         }
 643                         if (iflags & ITEM_IS_NEW)
 644                                 stats.created_files++;
 645                 }
 646
 647                 if (!am_server && INFO_GTE(PROGRESS, 1))
 648                         set_current_file_index(file, ndx);
 649                 stats.xferred_files++;
 650                 stats.total_transferred_size += F_LENGTH(file);
 651
 652                 cleanup_got_literal = 0;
 653
 654                 if (read_batch) {
 655                         int wanted = redoing
 656                                    ? we_want_redo(ndx)
 657                                    : gen_wants_ndx(ndx, cur_flist->flist_num);
 658                         if (!wanted) {
 659                                 rprintf(FINFO,
 660                                         "(Skipping batched update for%s \"%s\")\n",
 661                                         redoing ? " resend of" : "",
 662                                         fname);
 663                                 discard_receive_data(f_in, F_LENGTH(file));
 664                                 file->flags |= FLAG_FILE_SENT;
 665                                 continue;
 666                         }
 667                 }
 668
 669                 remember_initial_stats();
 670
 671                 if (!do_xfers) { /* log the transfer */
 672                         log_item(FCLIENT, file, iflags, NULL);
 673                         if (read_batch)
 674                                 discard_receive_data(f_in, F_LENGTH(file));
 675                         continue;
 676                 }
 677                 if (write_batch < 0) {
 678                         log_item(FCLIENT, file, iflags, NULL);
 679                         if (!am_server)
 680                                 discard_receive_data(f_in, F_LENGTH(file));
 681                         if (inc_recurse)
 682                                 send_msg_int(MSG_SUCCESS, ndx);
 683                         continue;
 684                 }
 685
 686                 partialptr = partial_dir ? partial_dir_fname(fname) : fname;
 687
 688                 if (protocol_version >= 29) {
 689                         switch (fnamecmp_type) {
 690                         case FNAMECMP_FNAME:
 691                                 fnamecmp = fname;
 692                                 break;
 693                         case FNAMECMP_PARTIAL_DIR:
 694                                 fnamecmp = partialptr;
 695                                 break;
 696                         case FNAMECMP_BACKUP:
 697                                 fnamecmp = get_backup_name(fname);
 698                                 break;
 699                         case FNAMECMP_FUZZY:
 700                                 if (file->dirname) {
 701                                         pathjoin(fnamecmpbuf, sizeof fnamecmpbuf, file->dirname, xname);
 702                                         fnamecmp = fnamecmpbuf;
 703                                 } else
 704                                         fnamecmp = xname;
 705                                 break;
 706                         default:
 707                                 if (fnamecmp_type > FNAMECMP_FUZZY && fnamecmp_type-FNAMECMP_FUZZY <= basis_dir_cnt) {
 708                                         fnamecmp_type -= FNAMECMP_FUZZY + 1;
 709                                         if (file->dirname) {
 710                                                 stringjoin(fnamecmpbuf, sizeof fnamecmpbuf,
 711                                                            basis_dir[fnamecmp_type], "/", file->dirname, "/", xname, NULL);
 712                                         } else
 713                                                 pathjoin(fnamecmpbuf, sizeof fnamecmpbuf, basis_dir[fnamecmp_type], xname);
 714                                 } else if (fnamecmp_type >= basis_dir_cnt) {
 715                                         rprintf(FERROR,
 716                                                 "invalid basis_dir index: %d.\n",
 717                                                 fnamecmp_type);
 718                                         exit_cleanup(RERR_PROTOCOL);
 719                                 } else
 720                                         pathjoin(fnamecmpbuf, sizeof fnamecmpbuf, basis_dir[fnamecmp_type], fname);
 721                                 fnamecmp = fnamecmpbuf;
 722                                 break;
 723                         }
 724                         if (!fnamecmp || (daemon_filter_list.head
 725                           && check_filter(&daemon_filter_list, FLOG, fnamecmp, 0) < 0)) {
 726                                 fnamecmp = fname;
 727                                 fnamecmp_type = FNAMECMP_FNAME;
 728                         }
 729                 } else {
 730                         /* Reminder: --inplace && --partial-dir are never
 731                          * enabled at the same time. */
 732                         if (inplace && make_backups > 0) {
 733                                 if (!(fnamecmp = get_backup_name(fname)))
 734                                         fnamecmp = fname;
 735                                 else
 736                                         fnamecmp_type = FNAMECMP_BACKUP;
 737                         } else if (partial_dir && partialptr)
 738                                 fnamecmp = partialptr;
 739                         else
 740                                 fnamecmp = fname;
 741                 }
 742
 743                 /* open the file */
 744                 fd1 = do_open(fnamecmp, O_RDONLY, 0);
 745
 746                 if (fd1 == -1 && protocol_version < 29) {
 747                         if (fnamecmp != fname) {
 748                                 fnamecmp = fname;
 749                                 fd1 = do_open(fnamecmp, O_RDONLY, 0);
 750                         }
 751
 752                         if (fd1 == -1 && basis_dir[0]) {
 753                                 /* pre-29 allowed only one alternate basis */
 754                                 pathjoin(fnamecmpbuf, sizeof fnamecmpbuf,
 755                                          basis_dir[0], fname);
 756                                 fnamecmp = fnamecmpbuf;
 757                                 fd1 = do_open(fnamecmp, O_RDONLY, 0);
 758                         }
 759                 }
 760
 761                 updating_basis_or_equiv = inplace
 762                     && (fnamecmp == fname || fnamecmp_type == FNAMECMP_BACKUP);
 763
 764                 if (fd1 == -1) {
 765                         st.st_mode = 0;
 766                         st.st_size = 0;
 767                 } else if (do_fstat(fd1,&st) != 0) {
 768                         rsyserr(FERROR_XFER, errno, "fstat %s failed",
 769                                 full_fname(fnamecmp));
 770                         discard_receive_data(f_in, F_LENGTH(file));
 771                         close(fd1);
 772                         if (inc_recurse)
 773                                 send_msg_int(MSG_NO_SEND, ndx);
 774                         continue;
 775                 }
 776
 777                 if (fd1 != -1 && S_ISDIR(st.st_mode) && fnamecmp == fname) {
 778                         /* this special handling for directories
 779                          * wouldn't be necessary if robust_rename()
 780                          * and the underlying robust_unlink could cope
 781                          * with directories
 782                          */
 783                         rprintf(FERROR_XFER, "recv_files: %s is a directory\n",
 784                                 full_fname(fnamecmp));
 785                         discard_receive_data(f_in, F_LENGTH(file));
 786                         close(fd1);
 787                         if (inc_recurse)
 788                                 send_msg_int(MSG_NO_SEND, ndx);
 789                         continue;
 790                 }
 791
 792                 if (fd1 != -1 && !S_ISREG(st.st_mode)) {
 793                         close(fd1);
 794                         fd1 = -1;
 795                 }
 796
 797                 /* If we're not preserving permissions, change the file-list's
 798                  * mode based on the local permissions and some heuristics. */
 799                 if (!preserve_perms) {
 800                         int exists = fd1 != -1;
 801 #ifdef SUPPORT_ACLS
 802                         const char *dn = file->dirname ? file->dirname : ".";
 803                         if (parent_dirname != dn
 804                          && strcmp(parent_dirname, dn) != 0) {
 805                                 dflt_perms = default_perms_for_dir(dn);
 806                                 parent_dirname = dn;
 807                         }
 808 #endif
 809                         file->mode = dest_mode(file->mode, st.st_mode,
 810                                                dflt_perms, exists);
 811                 }
 812
 813                 /* We now check to see if we are writing the file "inplace" */
 814                 if (inplace)  {
 815                         fd2 = do_open(fname, O_WRONLY|O_CREAT, 0600);
 816                         if (fd2 == -1) {
 817                                 rsyserr(FERROR_XFER, errno, "open %s failed",
 818                                         full_fname(fname));
 819                         } else if (updating_basis_or_equiv)
 820                                 cleanup_set(NULL, NULL, file, fd1, fd2);
 821                 } else {
 822                         fd2 = open_tmpfile(fnametmp, fname, file);
 823                         if (fd2 != -1)
 824                                 cleanup_set(fnametmp, partialptr, file, fd1, fd2);
 825                 }
 826
 827                 if (fd2 == -1) {
 828                         discard_receive_data(f_in, F_LENGTH(file));
 829                         if (fd1 != -1)
 830                                 close(fd1);
 831                         if (inc_recurse)
 832                                 send_msg_int(MSG_NO_SEND, ndx);
 833                         continue;
 834                 }
 835
 836                 /* log the transfer */
 837                 if (log_before_transfer)
 838                         log_item(FCLIENT, file, iflags, NULL);
 839                 else if (!am_server && INFO_GTE(NAME, 1) && INFO_EQ(PROGRESS, 1))
 840                         rprintf(FINFO, "%s\n", fname);
 841
 842                 /* recv file data */
 843                 recv_ok = receive_data(f_in, fnamecmp, fd1, st.st_size,
 844                                        fname, fd2, F_LENGTH(file));
 845
 846                 log_item(log_code, file, iflags, NULL);
 847
 848                 if (fd1 != -1)
 849                         close(fd1);
 850                 if (close(fd2) < 0) {
 851                         rsyserr(FERROR, errno, "close failed on %s",
 852                                 full_fname(fnametmp));
 853                         exit_cleanup(RERR_FILEIO);
 854                 }
 855
 856                 if ((recv_ok && (!delay_updates || !partialptr)) || inplace) {
 857                         if (partialptr == fname)
 858                                 partialptr = NULL;
 859                         if (!finish_transfer(fname, fnametmp, fnamecmp,
 860                                              partialptr, file, recv_ok, 1))
 861                                 recv_ok = -1;
 862                         else if (fnamecmp == partialptr) {
 863                                 do_unlink(partialptr);
 864                                 handle_partial_dir(partialptr, PDIR_DELETE);
 865                         }
 866                 } else if (keep_partial && partialptr) {
 867                         if (!handle_partial_dir(partialptr, PDIR_CREATE)) {
 868                                 rprintf(FERROR,
 869                                     "Unable to create partial-dir for %s -- discarding %s.\n",
 870                                     local_name ? local_name : f_name(file, NULL),
 871                                     recv_ok ? "completed file" : "partial file");
 872                                 do_unlink(fnametmp);
 873                                 recv_ok = -1;
 874                         } else if (!finish_transfer(partialptr, fnametmp, fnamecmp, NULL,
 875                                                     file, recv_ok, !partial_dir))
 876                                 recv_ok = -1;
 877                         else if (delay_updates && recv_ok) {
 878                                 bitbag_set_bit(delayed_bits, ndx);
 879                                 recv_ok = 2;
 880                         } else
 881                                 partialptr = NULL;
 882                 } else
 883                         do_unlink(fnametmp);
 884
 885                 cleanup_disable();
 886
 887                 if (read_batch)
 888                         file->flags |= FLAG_FILE_SENT;
 889
 890                 switch (recv_ok) {
 891                 case 2:
 892                         break;
 893                 case 1:
 894                         if (remove_source_files || inc_recurse
 895                          || (preserve_hard_links && F_IS_HLINKED(file)))
 896                                 send_msg_int(MSG_SUCCESS, ndx);
 897                         break;
 898                 case 0: {
 899                         enum logcode msgtype = redoing ? FERROR_XFER : FWARNING;
 900                         if (msgtype == FERROR_XFER || INFO_GTE(NAME, 1)) {
 901                                 char *errstr, *redostr, *keptstr;
 902                                 if (!(keep_partial && partialptr) && !inplace)
 903                                         keptstr = "discarded";
 904                                 else if (partial_dir)
 905                                         keptstr = "put into partial-dir";
 906                                 else
 907                                         keptstr = "retained";
 908                                 if (msgtype == FERROR_XFER) {
 909                                         errstr = "ERROR";
 910                                         redostr = "";
 911                                 } else {
 912                                         errstr = "WARNING";
 913                                         redostr = read_batch ? " (may try again)"
 914                                                              : " (will try again)";
 915                                 }
 916                                 rprintf(msgtype,
 917                                         "%s: %s failed verification -- update %s%s.\n",
 918                                         errstr, local_name ? f_name(file, NULL) : fname,
 919                                         keptstr, redostr);
 920                         }
 921                         if (!redoing) {
 922                                 if (read_batch)
 923                                         flist_ndx_push(&batch_redo_list, ndx);
 924                                 send_msg_int(MSG_REDO, ndx);
 925                                 file->flags |= FLAG_FILE_SENT;
 926                         } else if (inc_recurse)
 927                                 send_msg_int(MSG_NO_SEND, ndx);
 928                         break;
 929                     }
 930                 case -1:
 931                         if (inc_recurse)
 932                                 send_msg_int(MSG_NO_SEND, ndx);
 933                         break;
 934                 }
 935         }
 936         if (make_backups < 0)
 937                 make_backups = -make_backups;
 938
 939         if (phase == 2 && delay_updates) /* for protocol_version < 29 */
 940                 handle_delayed_updates(local_name);
 941
 942         if (DEBUG_GTE(RECV, 1))
 943                 rprintf(FINFO,"recv_files finished\n");
 944
 945         return 0;
 946 }