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) 2003-2021 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 write_devices;
  43 extern int preserve_xattrs;
  44 extern int do_fsync;
  45 extern int basis_dir_cnt;
  46 extern int make_backups;
  47 extern int cleanup_got_literal;
  48 extern int remove_source_files;
  49 extern int append_mode;
  50 extern int sparse_files;
  51 extern int preallocate_files;
  52 extern int keep_partial;
  53 extern int checksum_seed;
  54 extern int whole_file;
  55 extern int inplace;
  56 extern int inplace_partial;
  57 extern int allowed_lull;
  58 extern int delay_updates;
  59 extern int xfersum_type;
  60 extern BOOL want_progress_now;
  61 extern mode_t orig_umask;
  62 extern struct stats stats;
  63 extern char *tmpdir;
  64 extern char *partial_dir;
  65 extern char *basis_dir[MAX_BASIS_DIRS+1];
  66 extern char sender_file_sum[MAX_DIGEST_LEN];
  67 extern struct file_list *cur_flist, *first_flist, *dir_flist;
  68 extern filter_rule_list daemon_filter_list;
  69 extern OFF_T preallocated_len;
  70
  71 static struct bitbag *delayed_bits = NULL;
  72 static int phase = 0, redoing = 0;
  73 static flist_ndx_list batch_redo_list;
  74 /* This is non-0 when we are updating the basis file or an identical copy: */
  75 static int updating_basis_or_equiv;
  76
  77 #define TMPNAME_SUFFIX ".XXXXXX"
  78 #define TMPNAME_SUFFIX_LEN ((int)sizeof TMPNAME_SUFFIX - 1)
  79 #define MAX_UNIQUE_NUMBER 999999
  80 #define MAX_UNIQUE_LOOP 100
  81
  82 /* get_tmpname() - create a tmp filename for a given filename
  83  *
  84  * If a tmpdir is defined, use that as the directory to put it in.  Otherwise,
  85  * the tmp filename is in the same directory as the given name.  Note that
  86  * there may be no directory at all in the given name!
  87  *
  88  * The tmp filename is basically the given filename with a dot prepended, and
  89  * .XXXXXX appended (for mkstemp() to put its unique gunk in).  We take care
  90  * to not exceed either the MAXPATHLEN or NAME_MAX, especially the last, as
  91  * the basename basically becomes 8 characters longer.  In such a case, the
  92  * original name is shortened sufficiently to make it all fit.
  93  *
  94  * If the make_unique arg is True, the XXXXXX string is replaced with a unique
  95  * string that doesn't exist at the time of the check.  This is intended to be
  96  * used for creating hard links, symlinks, devices, and special files, since
  97  * normal files should be handled by mkstemp() for safety.
  98  *
  99  * Of course, the only reason the file is based on the original name is to
 100  * make it easier to figure out what purpose a temp file is serving when a
 101  * transfer is in progress. */
 102 int get_tmpname(char *fnametmp, const char *fname, BOOL make_unique)
 103 {
 104         int maxname, length = 0;
 105         const char *f;
 106         char *suf;
 107
 108         if (tmpdir) {
 109                 /* Note: this can't overflow, so the return value is safe */
 110                 length = strlcpy(fnametmp, tmpdir, MAXPATHLEN - 2);
 111                 fnametmp[length++] = '/';
 112         }
 113
 114         if ((f = strrchr(fname, '/')) != NULL) {
 115                 ++f;
 116                 if (!tmpdir) {
 117                         length = f - fname;
 118                         /* copy up to and including the slash */
 119                         strlcpy(fnametmp, fname, length + 1);
 120                 }
 121         } else
 122                 f = fname;
 123
 124         if (!tmpdir) { /* using a tmpdir avoids the leading dot on our temp names */
 125                 if (*f == '.') /* avoid an extra leading dot for OS X's sake */
 126                         f++;
 127                 fnametmp[length++] = '.';
 128         }
 129
 130         /* The maxname value is bufsize, and includes space for the '\0'.
 131          * NAME_MAX needs an extra -1 for the name's leading dot. */
 132         maxname = MIN(MAXPATHLEN - length - TMPNAME_SUFFIX_LEN,
 133                       NAME_MAX - 1 - TMPNAME_SUFFIX_LEN);
 134
 135         if (maxname < 0) {
 136                 rprintf(FERROR_XFER, "temporary filename too long: %s\n", fname);
 137                 fnametmp[0] = '\0';
 138                 return 0;
 139         }
 140
 141         if (maxname) {
 142                 int added = strlcpy(fnametmp + length, f, maxname);
 143                 if (added >= maxname)
 144                         added = maxname - 1;
 145                 suf = fnametmp + length + added;
 146
 147                 /* Trim any dangling high-bit chars if the first-trimmed char (if any) is
 148                  * also a high-bit char, just in case we cut into a multi-byte sequence.
 149                  * We are guaranteed to stop because of the leading '.' we added. */
 150                 if ((int)f[added] & 0x80) {
 151                         while ((int)suf[-1] & 0x80)
 152                                 suf--;
 153                 }
 154                 /* trim one trailing dot before our suffix's dot */
 155                 if (suf[-1] == '.')
 156                         suf--;
 157         } else
 158                 suf = fnametmp + length - 1; /* overwrite the leading dot with suffix's dot */
 159
 160         if (make_unique) {
 161                 static unsigned counter_limit;
 162                 unsigned counter;
 163
 164                 if (!counter_limit) {
 165                         counter_limit = (unsigned)getpid() + MAX_UNIQUE_LOOP;
 166                         if (counter_limit > MAX_UNIQUE_NUMBER || counter_limit < MAX_UNIQUE_LOOP)
 167                                 counter_limit = MAX_UNIQUE_LOOP;
 168                 }
 169                 counter = counter_limit - MAX_UNIQUE_LOOP;
 170
 171                 /* This doesn't have to be very good because we don't need
 172                  * to worry about someone trying to guess the values:  all
 173                  * a conflict will do is cause a device, special file, hard
 174                  * link, or symlink to fail to be created.  Also: avoid
 175                  * using mktemp() due to gcc's annoying warning. */
 176                 while (1) {
 177                         snprintf(suf, TMPNAME_SUFFIX_LEN+1, ".%d", counter);
 178                         if (access(fnametmp, 0) < 0)
 179                                 break;
 180                         if (++counter >= counter_limit)
 181                                 return 0;
 182                 }
 183         } else
 184                 memcpy(suf, TMPNAME_SUFFIX, TMPNAME_SUFFIX_LEN+1);
 185
 186         return 1;
 187 }
 188
 189 /* Opens a temporary file for writing.
 190  * Success: Writes name into fnametmp, returns fd.
 191  * Failure: Clobbers fnametmp, returns -1.
 192  * Calling cleanup_set() is the caller's job. */
 193 int open_tmpfile(char *fnametmp, const char *fname, struct file_struct *file)
 194 {
 195         int fd;
 196         mode_t added_perms;
 197
 198         if (!get_tmpname(fnametmp, fname, False))
 199                 return -1;
 200
 201         if (am_root < 0) {
 202                 /* For --fake-super, the file must be useable by the copying
 203                  * user, just like it would be for root. */
 204                 added_perms = S_IRUSR|S_IWUSR;
 205         } else {
 206                 /* For a normal copy, we need to be able to tweak things like xattrs. */
 207                 added_perms = S_IWUSR;
 208         }
 209
 210         /* We initially set the perms without the setuid/setgid bits or group
 211          * access to ensure that there is no race condition.  They will be
 212          * correctly updated after the right owner and group info is set.
 213          * (Thanks to snabb@epipe.fi for pointing this out.) */
 214         fd = do_mkstemp(fnametmp, (file->mode|added_perms) & INITACCESSPERMS);
 215
 216 #if 0
 217         /* In most cases parent directories will already exist because their
 218          * information should have been previously transferred, but that may
 219          * not be the case with -R */
 220         if (fd == -1 && relative_paths && errno == ENOENT
 221          && make_path(fnametmp, MKP_SKIP_SLASH | MKP_DROP_NAME) == 0) {
 222                 /* Get back to name with XXXXXX in it. */
 223                 get_tmpname(fnametmp, fname, False);
 224                 fd = do_mkstemp(fnametmp, (file->mode|added_perms) & INITACCESSPERMS);
 225         }
 226 #endif
 227
 228         if (fd == -1) {
 229                 rsyserr(FERROR_XFER, errno, "mkstemp %s failed",
 230                         full_fname(fnametmp));
 231                 return -1;
 232         }
 233
 234         return fd;
 235 }
 236
 237 static int receive_data(int f_in, char *fname_r, int fd_r, OFF_T size_r,
 238                         const char *fname, int fd, struct file_struct *file, int inplace_sizing)
 239 {
 240         static char file_sum1[MAX_DIGEST_LEN];
 241         struct map_struct *mapbuf;
 242         struct sum_struct sum;
 243         int sum_len;
 244         int32 len;
 245         OFF_T total_size = F_LENGTH(file);
 246         OFF_T offset = 0;
 247         OFF_T offset2;
 248         char *data;
 249         int32 i;
 250         char *map = NULL;
 251
 252 #ifdef SUPPORT_PREALLOCATION
 253         if (preallocate_files && fd != -1 && total_size > 0 && (!inplace_sizing || total_size > size_r)) {
 254                 /* Try to preallocate enough space for file's eventual length.  Can
 255                  * reduce fragmentation on filesystems like ext4, xfs, and NTFS. */
 256                 if ((preallocated_len = do_fallocate(fd, 0, total_size)) < 0)
 257                         rsyserr(FWARNING, errno, "do_fallocate %s", full_fname(fname));
 258         } else
 259 #endif
 260         if (inplace_sizing) {
 261 #ifdef HAVE_FTRUNCATE
 262                 /* The most compatible way to create a sparse file is to start with no length. */
 263                 if (sparse_files > 0 && whole_file && fd >= 0 && do_ftruncate(fd, 0) == 0)
 264                         preallocated_len = 0;
 265                 else
 266 #endif
 267                         preallocated_len = size_r;
 268         } else
 269                 preallocated_len = 0;
 270
 271         read_sum_head(f_in, &sum);
 272
 273         if (fd_r >= 0 && size_r > 0) {
 274                 int32 read_size = MAX(sum.blength * 2, 16*1024);
 275                 mapbuf = map_file(fd_r, size_r, read_size, sum.blength);
 276                 if (DEBUG_GTE(DELTASUM, 2)) {
 277                         rprintf(FINFO, "recv mapped %s of size %s\n",
 278                                 fname_r, big_num(size_r));
 279                 }
 280         } else
 281                 mapbuf = NULL;
 282
 283         sum_init(xfersum_type, checksum_seed);
 284
 285         if (append_mode > 0) {
 286                 OFF_T j;
 287                 sum.flength = (OFF_T)sum.count * sum.blength;
 288                 if (sum.remainder)
 289                         sum.flength -= sum.blength - sum.remainder;
 290                 if (append_mode == 2 && mapbuf) {
 291                         for (j = CHUNK_SIZE; j < sum.flength; j += CHUNK_SIZE) {
 292                                 if (INFO_GTE(PROGRESS, 1))
 293                                         show_progress(offset, total_size);
 294                                 sum_update(map_ptr(mapbuf, offset, CHUNK_SIZE),
 295                                            CHUNK_SIZE);
 296                                 offset = j;
 297                         }
 298                         if (offset < sum.flength) {
 299                                 int32 len = (int32)(sum.flength - offset);
 300                                 if (INFO_GTE(PROGRESS, 1))
 301                                         show_progress(offset, total_size);
 302                                 sum_update(map_ptr(mapbuf, offset, len), len);
 303                         }
 304                 }
 305                 offset = sum.flength;
 306                 if (fd != -1 && (j = do_lseek(fd, offset, SEEK_SET)) != offset) {
 307                         rsyserr(FERROR_XFER, errno, "lseek of %s returned %s, not %s",
 308                                 full_fname(fname), big_num(j), big_num(offset));
 309                         exit_cleanup(RERR_FILEIO);
 310                 }
 311         }
 312
 313         while ((i = recv_token(f_in, &data)) != 0) {
 314                 if (INFO_GTE(PROGRESS, 1))
 315                         show_progress(offset, total_size);
 316
 317                 if (allowed_lull)
 318                         maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH | MSK_ACTIVE_RECEIVER);
 319
 320                 if (i > 0) {
 321                         if (DEBUG_GTE(DELTASUM, 3)) {
 322                                 rprintf(FINFO,"data recv %d at %s\n",
 323                                         i, big_num(offset));
 324                         }
 325
 326                         stats.literal_data += i;
 327                         cleanup_got_literal = 1;
 328
 329                         sum_update(data, i);
 330
 331                         if (fd != -1 && write_file(fd, 0, offset, data, i) != i)
 332                                 goto report_write_error;
 333                         offset += i;
 334                         continue;
 335                 }
 336
 337                 i = -(i+1);
 338                 offset2 = i * (OFF_T)sum.blength;
 339                 len = sum.blength;
 340                 if (i == (int)sum.count-1 && sum.remainder != 0)
 341                         len = sum.remainder;
 342
 343                 stats.matched_data += len;
 344
 345                 if (DEBUG_GTE(DELTASUM, 3)) {
 346                         rprintf(FINFO,
 347                                 "chunk[%d] of size %ld at %s offset=%s%s\n",
 348                                 i, (long)len, big_num(offset2), big_num(offset),
 349                                 updating_basis_or_equiv && offset == offset2 ? " (seek)" : "");
 350                 }
 351
 352                 if (mapbuf) {
 353                         map = map_ptr(mapbuf,offset2,len);
 354
 355                         see_token(map, len);
 356                         sum_update(map, len);
 357                 }
 358
 359                 if (updating_basis_or_equiv) {
 360                         if (offset == offset2 && fd != -1) {
 361                                 if (skip_matched(fd, offset, map, len) < 0)
 362                                         goto report_write_error;
 363                                 offset += len;
 364                                 continue;
 365                         }
 366                 }
 367                 if (fd != -1 && map && write_file(fd, 0, offset, map, len) != (int)len)
 368                         goto report_write_error;
 369                 offset += len;
 370         }
 371
 372         if (fd != -1 && offset > 0) {
 373                 if (sparse_files > 0) {
 374                         if (sparse_end(fd, offset) != 0)
 375                                 goto report_write_error;
 376                 } else if (flush_write_file(fd) < 0) {
 377                     report_write_error:
 378                         rsyserr(FERROR_XFER, errno, "write failed on %s", full_fname(fname));
 379                         exit_cleanup(RERR_FILEIO);
 380                 }
 381         }
 382
 383 #ifdef HAVE_FTRUNCATE
 384         /* inplace: New data could be shorter than old data.
 385          * preallocate_files: total_size could have been an overestimate.
 386          *     Cut off any extra preallocated zeros from dest file. */
 387         if ((inplace_sizing || preallocated_len > offset) && fd != -1 && !IS_DEVICE(file->mode)) {
 388                 if (do_ftruncate(fd, offset) < 0)
 389                         rsyserr(FERROR_XFER, errno, "ftruncate failed on %s", full_fname(fname));
 390         }
 391 #endif
 392
 393         if (INFO_GTE(PROGRESS, 1))
 394                 end_progress(total_size);
 395
 396         sum_len = sum_end(file_sum1);
 397
 398         if (do_fsync && fd != -1 && fsync(fd) != 0) {
 399                 rsyserr(FERROR, errno, "fsync failed on %s", full_fname(fname));
 400                 exit_cleanup(RERR_FILEIO);
 401         }
 402
 403         if (mapbuf)
 404                 unmap_file(mapbuf);
 405
 406         read_buf(f_in, sender_file_sum, sum_len);
 407         if (DEBUG_GTE(DELTASUM, 2))
 408                 rprintf(FINFO,"got file_sum\n");
 409         if (fd != -1 && memcmp(file_sum1, sender_file_sum, sum_len) != 0)
 410                 return 0;
 411         return 1;
 412 }
 413
 414
 415 static void discard_receive_data(int f_in, struct file_struct *file)
 416 {
 417         receive_data(f_in, NULL, -1, 0, NULL, -1, file, 0);
 418 }
 419
 420 static void handle_delayed_updates(char *local_name)
 421 {
 422         char *fname, *partialptr;
 423         int ndx;
 424
 425         for (ndx = -1; (ndx = bitbag_next_bit(delayed_bits, ndx)) >= 0; ) {
 426                 struct file_struct *file = cur_flist->files[ndx];
 427                 fname = local_name ? local_name : f_name(file, NULL);
 428                 if ((partialptr = partial_dir_fname(fname)) != NULL) {
 429                         if (make_backups > 0 && !make_backup(fname, False))
 430                                 continue;
 431                         if (DEBUG_GTE(RECV, 1)) {
 432                                 rprintf(FINFO, "renaming %s to %s\n",
 433                                         partialptr, fname);
 434                         }
 435                         /* We don't use robust_rename() here because the
 436                          * partial-dir must be on the same drive. */
 437                         if (do_rename(partialptr, fname) < 0) {
 438                                 rsyserr(FERROR_XFER, errno,
 439                                         "rename failed for %s (from %s)",
 440                                         full_fname(fname), partialptr);
 441                         } else {
 442                                 if (remove_source_files
 443                                  || (preserve_hard_links && F_IS_HLINKED(file)))
 444                                         send_msg_int(MSG_SUCCESS, ndx);
 445                                 handle_partial_dir(partialptr, PDIR_DELETE);
 446                         }
 447                 }
 448         }
 449 }
 450
 451 static void no_batched_update(int ndx, BOOL is_redo)
 452 {
 453         struct file_list *flist = flist_for_ndx(ndx, "no_batched_update");
 454         struct file_struct *file = flist->files[ndx - flist->ndx_start];
 455
 456         rprintf(FERROR_XFER, "(No batched update for%s \"%s\")\n",
 457                 is_redo ? " resend of" : "", f_name(file, NULL));
 458
 459         if (inc_recurse && !dry_run)
 460                 send_msg_int(MSG_NO_SEND, ndx);
 461 }
 462
 463 static int we_want_redo(int desired_ndx)
 464 {
 465         static int redo_ndx = -1;
 466
 467         while (redo_ndx < desired_ndx) {
 468                 if (redo_ndx >= 0)
 469                         no_batched_update(redo_ndx, True);
 470                 if ((redo_ndx = flist_ndx_pop(&batch_redo_list)) < 0)
 471                         return 0;
 472         }
 473
 474         if (redo_ndx == desired_ndx) {
 475                 redo_ndx = -1;
 476                 return 1;
 477         }
 478
 479         return 0;
 480 }
 481
 482 static int gen_wants_ndx(int desired_ndx, int flist_num)
 483 {
 484         static int next_ndx = -1;
 485         static int done_cnt = 0;
 486         static BOOL got_eof = False;
 487
 488         if (got_eof)
 489                 return 0;
 490
 491         /* TODO: integrate gen-reading I/O into perform_io() so this is not needed? */
 492         io_flush(FULL_FLUSH);
 493
 494         while (next_ndx < desired_ndx) {
 495                 if (inc_recurse && flist_num <= done_cnt)
 496                         return 0;
 497                 if (next_ndx >= 0)
 498                         no_batched_update(next_ndx, False);
 499                 if ((next_ndx = read_int(batch_gen_fd)) < 0) {
 500                         if (inc_recurse) {
 501                                 done_cnt++;
 502                                 continue;
 503                         }
 504                         got_eof = True;
 505                         return 0;
 506                 }
 507         }
 508
 509         if (next_ndx == desired_ndx) {
 510                 next_ndx = -1;
 511                 return 1;
 512         }
 513
 514         return 0;
 515 }
 516
 517 /**
 518  * main routine for receiver process.
 519  *
 520  * Receiver process runs on the same host as the generator process. */
 521 int recv_files(int f_in, int f_out, char *local_name)
 522 {
 523         int fd1,fd2;
 524         STRUCT_STAT st;
 525         int iflags, xlen;
 526         char *fname, fbuf[MAXPATHLEN];
 527         char xname[MAXPATHLEN];
 528         char *fnametmp, fnametmpbuf[MAXPATHLEN];
 529         char *fnamecmp, *partialptr;
 530         char fnamecmpbuf[MAXPATHLEN];
 531         uchar fnamecmp_type;
 532         struct file_struct *file;
 533         int itemizing = am_server ? logfile_format_has_i : stdout_format_has_i;
 534         enum logcode log_code = log_before_transfer ? FLOG : FINFO;
 535         int max_phase = protocol_version >= 29 ? 2 : 1;
 536         int dflt_perms = (ACCESSPERMS & ~orig_umask);
 537 #ifdef SUPPORT_ACLS
 538         const char *parent_dirname = "";
 539 #endif
 540         int ndx, recv_ok, one_inplace;
 541
 542         if (DEBUG_GTE(RECV, 1))
 543                 rprintf(FINFO, "recv_files(%d) starting\n", cur_flist->used);
 544
 545         if (delay_updates)
 546                 delayed_bits = bitbag_create(cur_flist->used + 1);
 547
 548         if (whole_file < 0)
 549                 whole_file = 0;
 550
 551         progress_init();
 552
 553         while (1) {
 554                 cleanup_disable();
 555
 556                 /* This call also sets cur_flist. */
 557                 ndx = read_ndx_and_attrs(f_in, f_out, &iflags, &fnamecmp_type,
 558                                          xname, &xlen);
 559                 if (ndx == NDX_DONE) {
 560                         if (!am_server && cur_flist) {
 561                                 set_current_file_index(NULL, 0);
 562                                 if (INFO_GTE(PROGRESS, 2))
 563                                         end_progress(0);
 564                         }
 565                         if (inc_recurse && first_flist) {
 566                                 if (read_batch) {
 567                                         ndx = first_flist->used + first_flist->ndx_start;
 568                                         gen_wants_ndx(ndx, first_flist->flist_num);
 569                                 }
 570                                 flist_free(first_flist);
 571                                 if (first_flist)
 572                                         continue;
 573                         } else if (read_batch && first_flist) {
 574                                 ndx = first_flist->used;
 575                                 gen_wants_ndx(ndx, first_flist->flist_num);
 576                         }
 577                         if (++phase > max_phase)
 578                                 break;
 579                         if (DEBUG_GTE(RECV, 1))
 580                                 rprintf(FINFO, "recv_files phase=%d\n", phase);
 581                         if (phase == 2 && delay_updates)
 582                                 handle_delayed_updates(local_name);
 583                         write_int(f_out, NDX_DONE);
 584                         continue;
 585                 }
 586
 587                 if (ndx - cur_flist->ndx_start >= 0)
 588                         file = cur_flist->files[ndx - cur_flist->ndx_start];
 589                 else
 590                         file = dir_flist->files[cur_flist->parent_ndx];
 591                 fname = local_name ? local_name : f_name(file, fbuf);
 592
 593                 if (DEBUG_GTE(RECV, 1))
 594                         rprintf(FINFO, "recv_files(%s)\n", fname);
 595
 596                 if (daemon_filter_list.head && (*fname != '.' || fname[1] != '\0')
 597                  && check_filter(&daemon_filter_list, FLOG, fname, 0) < 0) {
 598                         rprintf(FERROR, "attempt to hack rsync failed.\n");
 599                         exit_cleanup(RERR_PROTOCOL);
 600                 }
 601
 602 #ifdef SUPPORT_XATTRS
 603                 if (preserve_xattrs && iflags & ITEM_REPORT_XATTR && do_xfers
 604                  && !(want_xattr_optim && BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE)))
 605                         recv_xattr_request(file, f_in);
 606 #endif
 607
 608                 if (!(iflags & ITEM_TRANSFER)) {
 609                         maybe_log_item(file, iflags, itemizing, xname);
 610 #ifdef SUPPORT_XATTRS
 611                         if (preserve_xattrs && iflags & ITEM_REPORT_XATTR && do_xfers
 612                          && !BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE))
 613                                 set_file_attrs(fname, file, NULL, fname, 0);
 614 #endif
 615                         if (iflags & ITEM_IS_NEW) {
 616                                 stats.created_files++;
 617                                 if (S_ISREG(file->mode)) {
 618                                         /* Nothing further to count. */
 619                                 } else if (S_ISDIR(file->mode))
 620                                         stats.created_dirs++;
 621 #ifdef SUPPORT_LINKS
 622                                 else if (S_ISLNK(file->mode))
 623                                         stats.created_symlinks++;
 624 #endif
 625                                 else if (IS_DEVICE(file->mode))
 626                                         stats.created_devices++;
 627                                 else
 628                                         stats.created_specials++;
 629                         }
 630                         continue;
 631                 }
 632                 if (phase == 2) {
 633                         rprintf(FERROR,
 634                                 "got transfer request in phase 2 [%s]\n",
 635                                 who_am_i());
 636                         exit_cleanup(RERR_PROTOCOL);
 637                 }
 638
 639                 if (file->flags & FLAG_FILE_SENT) {
 640                         if (csum_length == SHORT_SUM_LENGTH) {
 641                                 if (keep_partial && !partial_dir)
 642                                         make_backups = -make_backups; /* prevents double backup */
 643                                 if (append_mode)
 644                                         sparse_files = -sparse_files;
 645                                 append_mode = -append_mode;
 646                                 csum_length = SUM_LENGTH;
 647                                 redoing = 1;
 648                         }
 649                 } else {
 650                         if (csum_length != SHORT_SUM_LENGTH) {
 651                                 if (keep_partial && !partial_dir)
 652                                         make_backups = -make_backups;
 653                                 if (append_mode)
 654                                         sparse_files = -sparse_files;
 655                                 append_mode = -append_mode;
 656                                 csum_length = SHORT_SUM_LENGTH;
 657                                 redoing = 0;
 658                         }
 659                         if (iflags & ITEM_IS_NEW)
 660                                 stats.created_files++;
 661                 }
 662
 663                 if (!am_server)
 664                         set_current_file_index(file, ndx);
 665                 stats.xferred_files++;
 666                 stats.total_transferred_size += F_LENGTH(file);
 667
 668                 cleanup_got_literal = 0;
 669
 670                 if (read_batch) {
 671                         int wanted = redoing
 672                                    ? we_want_redo(ndx)
 673                                    : gen_wants_ndx(ndx, cur_flist->flist_num);
 674                         if (!wanted) {
 675                                 rprintf(FINFO,
 676                                         "(Skipping batched update for%s \"%s\")\n",
 677                                         redoing ? " resend of" : "",
 678                                         fname);
 679                                 discard_receive_data(f_in, file);
 680                                 file->flags |= FLAG_FILE_SENT;
 681                                 continue;
 682                         }
 683                 }
 684
 685                 remember_initial_stats();
 686
 687                 if (!do_xfers) { /* log the transfer */
 688                         log_item(FCLIENT, file, iflags, NULL);
 689                         if (read_batch)
 690                                 discard_receive_data(f_in, file);
 691                         continue;
 692                 }
 693                 if (write_batch < 0) {
 694                         log_item(FCLIENT, file, iflags, NULL);
 695                         if (!am_server)
 696                                 discard_receive_data(f_in, file);
 697                         if (inc_recurse)
 698                                 send_msg_int(MSG_SUCCESS, ndx);
 699                         continue;
 700                 }
 701
 702                 partialptr = partial_dir ? partial_dir_fname(fname) : fname;
 703
 704                 if (protocol_version >= 29) {
 705                         switch (fnamecmp_type) {
 706                         case FNAMECMP_FNAME:
 707                                 fnamecmp = fname;
 708                                 break;
 709                         case FNAMECMP_PARTIAL_DIR:
 710                                 fnamecmp = partialptr;
 711                                 break;
 712                         case FNAMECMP_BACKUP:
 713                                 fnamecmp = get_backup_name(fname);
 714                                 break;
 715                         case FNAMECMP_FUZZY:
 716                                 if (file->dirname) {
 717                                         pathjoin(fnamecmpbuf, sizeof fnamecmpbuf, file->dirname, xname);
 718                                         fnamecmp = fnamecmpbuf;
 719                                 } else
 720                                         fnamecmp = xname;
 721                                 break;
 722                         default:
 723                                 if (fnamecmp_type > FNAMECMP_FUZZY && fnamecmp_type-FNAMECMP_FUZZY <= basis_dir_cnt) {
 724                                         fnamecmp_type -= FNAMECMP_FUZZY + 1;
 725                                         if (file->dirname) {
 726                                                 stringjoin(fnamecmpbuf, sizeof fnamecmpbuf,
 727                                                            basis_dir[fnamecmp_type], "/", file->dirname, "/", xname, NULL);
 728                                         } else
 729                                                 pathjoin(fnamecmpbuf, sizeof fnamecmpbuf, basis_dir[fnamecmp_type], xname);
 730                                 } else if (fnamecmp_type >= basis_dir_cnt) {
 731                                         rprintf(FERROR,
 732                                                 "invalid basis_dir index: %d.\n",
 733                                                 fnamecmp_type);
 734                                         exit_cleanup(RERR_PROTOCOL);
 735                                 } else
 736                                         pathjoin(fnamecmpbuf, sizeof fnamecmpbuf, basis_dir[fnamecmp_type], fname);
 737                                 fnamecmp = fnamecmpbuf;
 738                                 break;
 739                         }
 740                         if (!fnamecmp || (daemon_filter_list.head
 741                           && check_filter(&daemon_filter_list, FLOG, fnamecmp, 0) < 0)) {
 742                                 fnamecmp = fname;
 743                                 fnamecmp_type = FNAMECMP_FNAME;
 744                         }
 745                 } else {
 746                         /* Reminder: --inplace && --partial-dir are never
 747                          * enabled at the same time. */
 748                         if (inplace && make_backups > 0) {
 749                                 if (!(fnamecmp = get_backup_name(fname)))
 750                                         fnamecmp = fname;
 751                                 else
 752                                         fnamecmp_type = FNAMECMP_BACKUP;
 753                         } else if (partial_dir && partialptr)
 754                                 fnamecmp = partialptr;
 755                         else
 756                                 fnamecmp = fname;
 757                 }
 758
 759                 /* open the file */
 760                 fd1 = do_open(fnamecmp, O_RDONLY, 0);
 761
 762                 if (fd1 == -1 && protocol_version < 29) {
 763                         if (fnamecmp != fname) {
 764                                 fnamecmp = fname;
 765                                 fnamecmp_type = FNAMECMP_FNAME;
 766                                 fd1 = do_open(fnamecmp, O_RDONLY, 0);
 767                         }
 768
 769                         if (fd1 == -1 && basis_dir[0]) {
 770                                 /* pre-29 allowed only one alternate basis */
 771                                 pathjoin(fnamecmpbuf, sizeof fnamecmpbuf,
 772                                          basis_dir[0], fname);
 773                                 fnamecmp = fnamecmpbuf;
 774                                 fnamecmp_type = FNAMECMP_BASIS_DIR_LOW;
 775                                 fd1 = do_open(fnamecmp, O_RDONLY, 0);
 776                         }
 777                 }
 778
 779                 one_inplace = inplace_partial && fnamecmp_type == FNAMECMP_PARTIAL_DIR;
 780                 updating_basis_or_equiv = one_inplace
 781                     || (inplace && (fnamecmp == fname || fnamecmp_type == FNAMECMP_BACKUP));
 782
 783                 if (fd1 == -1) {
 784                         st.st_mode = 0;
 785                         st.st_size = 0;
 786                 } else if (do_fstat(fd1,&st) != 0) {
 787                         rsyserr(FERROR_XFER, errno, "fstat %s failed",
 788                                 full_fname(fnamecmp));
 789                         discard_receive_data(f_in, file);
 790                         close(fd1);
 791                         if (inc_recurse)
 792                                 send_msg_int(MSG_NO_SEND, ndx);
 793                         continue;
 794                 }
 795
 796                 if (fd1 != -1 && S_ISDIR(st.st_mode) && fnamecmp == fname) {
 797                         /* this special handling for directories
 798                          * wouldn't be necessary if robust_rename()
 799                          * and the underlying robust_unlink could cope
 800                          * with directories
 801                          */
 802                         rprintf(FERROR_XFER, "recv_files: %s is a directory\n",
 803                                 full_fname(fnamecmp));
 804                         discard_receive_data(f_in, file);
 805                         close(fd1);
 806                         if (inc_recurse)
 807                                 send_msg_int(MSG_NO_SEND, ndx);
 808                         continue;
 809                 }
 810
 811                 if (fd1 != -1 && !(S_ISREG(st.st_mode) || (write_devices && IS_DEVICE(st.st_mode)))) {
 812                         close(fd1);
 813                         fd1 = -1;
 814                 }
 815
 816                 if (fd1 != -1 && IS_DEVICE(st.st_mode) && st.st_size == 0)
 817                         st.st_size = get_device_size(fd1, fname);
 818
 819                 /* If we're not preserving permissions, change the file-list's
 820                  * mode based on the local permissions and some heuristics. */
 821                 if (!preserve_perms) {
 822                         int exists = fd1 != -1;
 823 #ifdef SUPPORT_ACLS
 824                         const char *dn = file->dirname ? file->dirname : ".";
 825                         if (parent_dirname != dn
 826                          && strcmp(parent_dirname, dn) != 0) {
 827                                 dflt_perms = default_perms_for_dir(dn);
 828                                 parent_dirname = dn;
 829                         }
 830 #endif
 831                         file->mode = dest_mode(file->mode, st.st_mode, dflt_perms, exists);
 832                 }
 833
 834                 /* We now check to see if we are writing the file "inplace" */
 835                 if (inplace || one_inplace)  {
 836                         fnametmp = one_inplace ? partialptr : fname;
 837                         fd2 = do_open(fnametmp, O_WRONLY|O_CREAT, 0600);
 838 #ifdef linux
 839                         if (fd2 == -1 && errno == EACCES) {
 840                                 /* Maybe the error was due to protected_regular setting? */
 841                                 fd2 = do_open(fname, O_WRONLY, 0600);
 842                         }
 843 #endif
 844                         if (fd2 == -1) {
 845                                 rsyserr(FERROR_XFER, errno, "open %s failed",
 846                                         full_fname(fnametmp));
 847                         } else if (updating_basis_or_equiv)
 848                                 cleanup_set(NULL, NULL, file, fd1, fd2);
 849                 } else {
 850                         fnametmp = fnametmpbuf;
 851                         fd2 = open_tmpfile(fnametmp, fname, file);
 852                         if (fd2 != -1)
 853                                 cleanup_set(fnametmp, partialptr, file, fd1, fd2);
 854                 }
 855
 856                 if (fd2 == -1) {
 857                         discard_receive_data(f_in, file);
 858                         if (fd1 != -1)
 859                                 close(fd1);
 860                         if (inc_recurse)
 861                                 send_msg_int(MSG_NO_SEND, ndx);
 862                         continue;
 863                 }
 864
 865                 /* log the transfer */
 866                 if (log_before_transfer)
 867                         log_item(FCLIENT, file, iflags, NULL);
 868                 else if (!am_server && INFO_GTE(NAME, 1) && INFO_EQ(PROGRESS, 1))
 869                         rprintf(FINFO, "%s\n", fname);
 870
 871                 /* recv file data */
 872                 recv_ok = receive_data(f_in, fnamecmp, fd1, st.st_size, fname, fd2, file, inplace || one_inplace);
 873
 874                 log_item(log_code, file, iflags, NULL);
 875                 if (want_progress_now)
 876                         instant_progress(fname);
 877
 878                 if (fd1 != -1)
 879                         close(fd1);
 880                 if (close(fd2) < 0) {
 881                         rsyserr(FERROR, errno, "close failed on %s",
 882                                 full_fname(fnametmp));
 883                         exit_cleanup(RERR_FILEIO);
 884                 }
 885
 886                 if ((recv_ok && (!delay_updates || !partialptr)) || inplace) {
 887                         if (partialptr == fname)
 888                                 partialptr = NULL;
 889                         if (!finish_transfer(fname, fnametmp, fnamecmp, partialptr, file, recv_ok, 1))
 890                                 recv_ok = -1;
 891                         else if (fnamecmp == partialptr) {
 892                                 if (!one_inplace)
 893                                         do_unlink(partialptr);
 894                                 handle_partial_dir(partialptr, PDIR_DELETE);
 895                         }
 896                 } else if (keep_partial && partialptr && (!one_inplace || delay_updates)) {
 897                         if (!handle_partial_dir(partialptr, PDIR_CREATE)) {
 898                                 rprintf(FERROR,
 899                                         "Unable to create partial-dir for %s -- discarding %s.\n",
 900                                         local_name ? local_name : f_name(file, NULL),
 901                                         recv_ok ? "completed file" : "partial file");
 902                                 do_unlink(fnametmp);
 903                                 recv_ok = -1;
 904                         } else if (!finish_transfer(partialptr, fnametmp, fnamecmp, NULL,
 905                                                     file, recv_ok, !partial_dir))
 906                                 recv_ok = -1;
 907                         else if (delay_updates && recv_ok) {
 908                                 bitbag_set_bit(delayed_bits, ndx);
 909                                 recv_ok = 2;
 910                         } else
 911                                 partialptr = NULL;
 912                 } else if (!one_inplace)
 913                         do_unlink(fnametmp);
 914
 915                 cleanup_disable();
 916
 917                 if (read_batch)
 918                         file->flags |= FLAG_FILE_SENT;
 919
 920                 switch (recv_ok) {
 921                 case 2:
 922                         break;
 923                 case 1:
 924                         if (remove_source_files || inc_recurse
 925                          || (preserve_hard_links && F_IS_HLINKED(file)))
 926                                 send_msg_int(MSG_SUCCESS, ndx);
 927                         break;
 928                 case 0: {
 929                         enum logcode msgtype = redoing ? FERROR_XFER : FWARNING;
 930                         if (msgtype == FERROR_XFER || INFO_GTE(NAME, 1) || stdout_format_has_i) {
 931                                 char *errstr, *redostr, *keptstr;
 932                                 if (!(keep_partial && partialptr) && !inplace)
 933                                         keptstr = "discarded";
 934                                 else if (partial_dir)
 935                                         keptstr = "put into partial-dir";
 936                                 else
 937                                         keptstr = "retained";
 938                                 if (msgtype == FERROR_XFER) {
 939                                         errstr = "ERROR";
 940                                         redostr = "";
 941                                 } else {
 942                                         errstr = "WARNING";
 943                                         redostr = read_batch ? " (may try again)"
 944                                                              : " (will try again)";
 945                                 }
 946                                 rprintf(msgtype,
 947                                         "%s: %s failed verification -- update %s%s.\n",
 948                                         errstr, local_name ? f_name(file, NULL) : fname,
 949                                         keptstr, redostr);
 950                         }
 951                         if (!redoing) {
 952                                 if (read_batch)
 953                                         flist_ndx_push(&batch_redo_list, ndx);
 954                                 send_msg_int(MSG_REDO, ndx);
 955                                 file->flags |= FLAG_FILE_SENT;
 956                         } else if (inc_recurse)
 957                                 send_msg_int(MSG_NO_SEND, ndx);
 958                         break;
 959                 }
 960                 case -1:
 961                         if (inc_recurse)
 962                                 send_msg_int(MSG_NO_SEND, ndx);
 963                         break;
 964                 }
 965         }
 966         if (make_backups < 0)
 967                 make_backups = -make_backups;
 968
 969         if (phase == 2 && delay_updates) /* for protocol_version < 29 */
 970                 handle_delayed_updates(local_name);
 971
 972         if (DEBUG_GTE(RECV, 1))
 973                 rprintf(FINFO,"recv_files finished\n");
 974
 975         return 0;
 976 }