generator.c

   1 /* -*- c-file-style: "linux" -*-
   2
   3    rsync -- fast file replication program
   4
   5    Copyright (C) 1996-2000 by Andrew Tridgell
   6    Copyright (C) Paul Mackerras 1996
   7    Copyright (C) 2002 by Martin Pool <mbp@samba.org>
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22 */
  23
  24 #include "rsync.h"
  25
  26 extern int verbose;
  27 extern int dry_run;
  28 extern int do_xfers;
  29 extern int log_format_has_i;
  30 extern int log_format_has_o_or_i;
  31 extern int daemon_log_format_has_i;
  32 extern int am_root;
  33 extern int am_server;
  34 extern int am_daemon;
  35 extern int do_progress;
  36 extern int recurse;
  37 extern int relative_paths;
  38 extern int keep_dirlinks;
  39 extern int preserve_links;
  40 extern int preserve_devices;
  41 extern int preserve_specials;
  42 extern int preserve_hard_links;
  43 extern int preserve_perms;
  44 extern int preserve_uid;
  45 extern int preserve_gid;
  46 extern int preserve_times;
  47 extern int omit_dir_times;
  48 extern int delete_mode;
  49 extern int delete_before;
  50 extern int delete_during;
  51 extern int delete_after;
  52 extern int module_id;
  53 extern int ignore_errors;
  54 extern int remove_sent_files;
  55 extern int delay_updates;
  56 extern int update_only;
  57 extern int ignore_existing;
  58 extern int ignore_non_existing;
  59 extern int inplace;
  60 extern int append_mode;
  61 extern int make_backups;
  62 extern int csum_length;
  63 extern int ignore_times;
  64 extern int size_only;
  65 extern OFF_T max_size;
  66 extern OFF_T min_size;
  67 extern int io_error;
  68 extern int allowed_lull;
  69 extern int sock_f_out;
  70 extern int ignore_timeout;
  71 extern int protocol_version;
  72 extern int fuzzy_basis;
  73 extern int always_checksum;
  74 extern int checksum_len;
  75 extern char *partial_dir;
  76 extern char *basis_dir[];
  77 extern int compare_dest;
  78 extern int copy_dest;
  79 extern int link_dest;
  80 extern int whole_file;
  81 extern int list_only;
  82 extern int read_batch;
  83 extern int orig_umask;
  84 extern int safe_symlinks;
  85 extern long block_size; /* "long" because popt can't set an int32. */
  86 extern int max_delete;
  87 extern int force_delete;
  88 extern int one_file_system;
  89 extern struct stats stats;
  90 extern dev_t filesystem_dev;
  91 extern char *backup_dir;
  92 extern char *backup_suffix;
  93 extern int backup_suffix_len;
  94 extern struct file_list *the_file_list;
  95 extern struct filter_list_struct server_filter_list;
  96
  97 static int deletion_count = 0; /* used to implement --max-delete */
  98 static int can_link_symlinks = 1; /* start out optimistic */
  99 static int can_link_devices = 1;
 100
 101 /* For calling delete_file() */
 102 #define DEL_FORCE_RECURSE       (1<<1) /* recurse even w/o --force */
 103 #define DEL_TERSE               (1<<3)
 104
 105
 106 static int is_backup_file(char *fn)
 107 {
 108         int k = strlen(fn) - backup_suffix_len;
 109         return k > 0 && strcmp(fn+k, backup_suffix) == 0;
 110 }
 111
 112
 113 /* Delete a file or directory.  If DEL_FORCE_RECURSE is set in the flags, or if
 114  * force_delete is set, this will delete recursively.
 115  *
 116  * Note that fname must point to a MAXPATHLEN buffer if the mode indicates it's
 117  * a directory! (The buffer is used for recursion, but returned unchanged.)
 118  */
 119 static int delete_item(char *fname, int mode, int flags)
 120 {
 121         struct file_list *dirlist;
 122         int j, dlen, zap_dir, ok;
 123         unsigned remainder;
 124         void *save_filters;
 125         char *p;
 126
 127         if (!S_ISDIR(mode)) {
 128                 if (max_delete && ++deletion_count > max_delete)
 129                         return 0;
 130                 if (make_backups && (backup_dir || !is_backup_file(fname)))
 131                         ok = make_backup(fname);
 132                 else
 133                         ok = robust_unlink(fname) == 0;
 134                 if (ok) {
 135                         if (!(flags & DEL_TERSE))
 136                                 log_delete(fname, mode);
 137                         return 0;
 138                 }
 139                 if (errno == ENOENT) {
 140                         deletion_count--;
 141                         return 0;
 142                 }
 143                 rsyserr(FERROR, errno, "delete_file: unlink %s failed",
 144                         full_fname(fname));
 145                 return -1;
 146         }
 147
 148         zap_dir = flags & DEL_FORCE_RECURSE || force_delete;
 149         if ((max_delete && ++deletion_count > max_delete)
 150             || (dry_run && zap_dir)) {
 151                 ok = 0;
 152                 errno = ENOTEMPTY;
 153         } else if (make_backups && !backup_dir && !is_backup_file(fname)
 154             && !(flags & DEL_FORCE_RECURSE))
 155                 ok = make_backup(fname);
 156         else
 157                 ok = do_rmdir(fname) == 0;
 158         if (ok) {
 159                 if (!(flags & DEL_TERSE))
 160                         log_delete(fname, mode);
 161                 return 0;
 162         }
 163         if (errno == ENOENT) {
 164                 deletion_count--;
 165                 return 0;
 166         }
 167         if (!zap_dir) {
 168                 rsyserr(FERROR, errno, "delete_file: rmdir %s failed",
 169                         full_fname(fname));
 170                 return -1;
 171         }
 172         flags |= DEL_FORCE_RECURSE; /* mark subdir dels as not "in the way" */
 173         deletion_count--;
 174
 175         dlen = strlen(fname);
 176         save_filters = push_local_filters(fname, dlen);
 177
 178         dirlist = get_dirlist(fname, dlen, 0);
 179
 180         p = fname + dlen;
 181         if (dlen != 1 || *fname != '/')
 182                 *p++ = '/';
 183         remainder = MAXPATHLEN - (p - fname);
 184
 185         for (j = dirlist->count; j--; ) {
 186                 struct file_struct *fp = dirlist->files[j];
 187
 188                 if (fp->flags & FLAG_MOUNT_POINT)
 189                         continue;
 190
 191                 strlcpy(p, fp->basename, remainder);
 192                 delete_item(fname, fp->mode, flags & ~DEL_TERSE);
 193         }
 194         flist_free(dirlist);
 195
 196         fname[dlen] = '\0';
 197
 198         pop_local_filters(save_filters);
 199
 200         if (max_delete && ++deletion_count > max_delete)
 201                 return 0;
 202
 203         if (do_rmdir(fname) == 0) {
 204                 if (!(flags & DEL_TERSE))
 205                         log_delete(fname, mode);
 206         } else if (errno != ENOTEMPTY && errno != EEXIST && errno != ENOENT) {
 207                 rsyserr(FERROR, errno, "delete_file: rmdir %s failed",
 208                         full_fname(fname));
 209                 return -1;
 210         }
 211
 212         return 0;
 213 }
 214
 215
 216 /* This function is used to implement per-directory deletion, and is used by
 217  * all the --delete-WHEN options.  Note that the fbuf pointer must point to a
 218  * MAXPATHLEN buffer with the name of the directory in it (the functions we
 219  * call will append names onto the end, but the old dir value will be restored
 220  * on exit). */
 221 static void delete_in_dir(struct file_list *flist, char *fbuf,
 222                           struct file_struct *file, STRUCT_STAT *stp)
 223 {
 224         static int min_depth = MAXPATHLEN, cur_depth = -1;
 225         static void *filt_array[MAXPATHLEN/2+1];
 226         static int already_warned = 0;
 227         struct file_list *dirlist;
 228         char delbuf[MAXPATHLEN];
 229         int dlen, i;
 230
 231         if (!flist) {
 232                 while (cur_depth >= min_depth)
 233                         pop_local_filters(filt_array[cur_depth--]);
 234                 min_depth = MAXPATHLEN;
 235                 cur_depth = -1;
 236                 return;
 237         }
 238
 239         if (verbose > 2)
 240                 rprintf(FINFO, "delete_in_dir(%s)\n", fbuf);
 241
 242         if (allowed_lull)
 243                 maybe_send_keepalive();
 244
 245         if (file->dir.depth >= MAXPATHLEN/2+1)
 246                 return; /* Impossible... */
 247
 248         if (io_error && !(lp_ignore_errors(module_id) || ignore_errors)) {
 249                 if (already_warned)
 250                         return;
 251                 rprintf(FINFO,
 252                         "IO error encountered -- skipping file deletion\n");
 253                 already_warned = 1;
 254                 return;
 255         }
 256
 257         while (cur_depth >= file->dir.depth && cur_depth >= min_depth)
 258                 pop_local_filters(filt_array[cur_depth--]);
 259         cur_depth = file->dir.depth;
 260         if (min_depth > cur_depth)
 261                 min_depth = cur_depth;
 262         dlen = strlen(fbuf);
 263         filt_array[cur_depth] = push_local_filters(fbuf, dlen);
 264
 265         if (one_file_system) {
 266                 if (file->flags & FLAG_TOP_DIR)
 267                         filesystem_dev = stp->st_dev;
 268                 else if (filesystem_dev != stp->st_dev)
 269                         return;
 270         }
 271
 272         dirlist = get_dirlist(fbuf, dlen, 0);
 273
 274         /* If an item in dirlist is not found in flist, delete it
 275          * from the filesystem. */
 276         for (i = dirlist->count; i--; ) {
 277                 struct file_struct *fp = dirlist->files[i];
 278                 if (!fp->basename || fp->flags & FLAG_MOUNT_POINT)
 279                         continue;
 280                 if (flist_find(flist, fp) < 0) {
 281                         f_name(fp, delbuf);
 282                         delete_item(delbuf, fp->mode, DEL_FORCE_RECURSE);
 283                 }
 284         }
 285
 286         flist_free(dirlist);
 287 }
 288
 289 /* This deletes any files on the receiving side that are not present on the
 290  * sending side.  This is used by --delete-before and --delete-after. */
 291 static void do_delete_pass(struct file_list *flist)
 292 {
 293         char fbuf[MAXPATHLEN];
 294         STRUCT_STAT st;
 295         int j;
 296
 297         if (dry_run > 1 /* destination doesn't exist yet */
 298          || list_only)
 299                 return;
 300
 301         for (j = 0; j < flist->count; j++) {
 302                 struct file_struct *file = flist->files[j];
 303
 304                 if (!(file->flags & FLAG_DEL_HERE))
 305                         continue;
 306
 307                 f_name(file, fbuf);
 308                 if (verbose > 1 && file->flags & FLAG_TOP_DIR)
 309                         rprintf(FINFO, "deleting in %s\n", fbuf);
 310
 311                 if (link_stat(fbuf, &st, keep_dirlinks) < 0
 312                  || !S_ISDIR(st.st_mode))
 313                         continue;
 314
 315                 delete_in_dir(flist, fbuf, file, &st);
 316         }
 317         delete_in_dir(NULL, NULL, NULL, NULL);
 318
 319         if (do_progress && !am_server)
 320                 rprintf(FINFO, "                    \r");
 321 }
 322
 323 int unchanged_attrs(struct file_struct *file, STRUCT_STAT *st)
 324 {
 325         if (preserve_perms
 326          && (st->st_mode & CHMOD_BITS) != (file->mode & CHMOD_BITS))
 327                 return 0;
 328
 329         if (am_root && preserve_uid && st->st_uid != file->uid)
 330                 return 0;
 331
 332         if (preserve_gid && file->gid != GID_NONE && st->st_gid != file->gid)
 333                 return 0;
 334
 335         return 1;
 336 }
 337
 338 void itemize(struct file_struct *file, int ndx, int statret, STRUCT_STAT *st,
 339              int32 iflags, uchar fnamecmp_type, char *xname)
 340 {
 341         if (statret >= 0) { /* A from-dest-dir statret can == 1! */
 342                 int keep_time = !preserve_times ? 0
 343                     : S_ISDIR(file->mode) ? !omit_dir_times
 344                     : !S_ISLNK(file->mode);
 345
 346                 if (S_ISREG(file->mode) && file->length != st->st_size)
 347                         iflags |= ITEM_REPORT_SIZE;
 348                 if ((iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !keep_time
 349                      && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
 350                     || (keep_time && cmp_modtime(file->modtime, st->st_mtime) != 0))
 351                         iflags |= ITEM_REPORT_TIME;
 352                 if (preserve_perms
 353                  && (file->mode & CHMOD_BITS) != (st->st_mode & CHMOD_BITS))
 354                         iflags |= ITEM_REPORT_PERMS;
 355                 if (preserve_uid && am_root && file->uid != st->st_uid)
 356                         iflags |= ITEM_REPORT_OWNER;
 357                 if (preserve_gid && file->gid != GID_NONE
 358                     && st->st_gid != file->gid)
 359                         iflags |= ITEM_REPORT_GROUP;
 360         } else
 361                 iflags |= ITEM_IS_NEW;
 362
 363         iflags &= 0xffff;
 364         if ((iflags & SIGNIFICANT_ITEM_FLAGS || verbose > 1
 365           || log_format_has_i > 1 || (xname && *xname)) && !read_batch) {
 366                 if (protocol_version >= 29) {
 367                         if (ndx >= 0)
 368                                 write_int(sock_f_out, ndx);
 369                         write_shortint(sock_f_out, iflags);
 370                         if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
 371                                 write_byte(sock_f_out, fnamecmp_type);
 372                         if (iflags & ITEM_XNAME_FOLLOWS)
 373                                 write_vstring(sock_f_out, xname, strlen(xname));
 374                 } else if (ndx >= 0)
 375                         log_item(file, &stats, iflags, xname);
 376         }
 377 }
 378
 379
 380 /* Perform our quick-check heuristic for determining if a file is unchanged. */
 381 int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
 382 {
 383         if (st->st_size != file->length)
 384                 return 0;
 385
 386         /* if always checksum is set then we use the checksum instead
 387            of the file time to determine whether to sync */
 388         if (always_checksum && S_ISREG(st->st_mode)) {
 389                 char sum[MD4_SUM_LENGTH];
 390                 file_checksum(fn, sum, st->st_size);
 391                 return memcmp(sum, file->u.sum, checksum_len) == 0;
 392         }
 393
 394         if (size_only)
 395                 return 1;
 396
 397         if (ignore_times)
 398                 return 0;
 399
 400         return cmp_modtime(st->st_mtime, file->modtime) == 0;
 401 }
 402
 403
 404 /*
 405  * set (initialize) the size entries in the per-file sum_struct
 406  * calculating dynamic block and checksum sizes.
 407  *
 408  * This is only called from generate_and_send_sums() but is a separate
 409  * function to encapsulate the logic.
 410  *
 411  * The block size is a rounded square root of file length.
 412  *
 413  * The checksum size is determined according to:
 414  *     blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
 415  * provided by Donovan Baarda which gives a probability of rsync
 416  * algorithm corrupting data and falling back using the whole md4
 417  * checksums.
 418  *
 419  * This might be made one of several selectable heuristics.
 420  */
 421 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
 422 {
 423         int32 blength;
 424         int s2length;
 425
 426         if (block_size)
 427                 blength = block_size;
 428         else if (len <= BLOCK_SIZE * BLOCK_SIZE)
 429                 blength = BLOCK_SIZE;
 430         else {
 431                 int32 c;
 432                 int64 l;
 433                 int cnt;
 434                 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
 435                 if (cnt >= 31 || c >= MAX_BLOCK_SIZE)
 436                         blength = MAX_BLOCK_SIZE;
 437                 else {
 438                     blength = 0;
 439                     do {
 440                             blength |= c;
 441                             if (len < (int64)blength * blength)
 442                                     blength &= ~c;
 443                             c >>= 1;
 444                     } while (c >= 8);   /* round to multiple of 8 */
 445                     blength = MAX(blength, BLOCK_SIZE);
 446                 }
 447         }
 448
 449         if (protocol_version < 27) {
 450                 s2length = csum_length;
 451         } else if (csum_length == SUM_LENGTH) {
 452                 s2length = SUM_LENGTH;
 453         } else {
 454                 int32 c;
 455                 int64 l;
 456                 int b = BLOCKSUM_BIAS;
 457                 for (l = len; l >>= 1; b += 2) {}
 458                 for (c = blength; c >>= 1 && b; b--) {}
 459                 /* add a bit, subtract rollsum, round up. */
 460                 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
 461                 s2length = MAX(s2length, csum_length);
 462                 s2length = MIN(s2length, SUM_LENGTH);
 463         }
 464
 465         sum->flength    = len;
 466         sum->blength    = blength;
 467         sum->s2length   = s2length;
 468         sum->remainder  = len % blength;
 469         sum->count      = len / blength + (sum->remainder != 0);
 470
 471         if (sum->count && verbose > 2) {
 472                 rprintf(FINFO,
 473                         "count=%.0f rem=%ld blength=%ld s2length=%d flength=%.0f\n",
 474                         (double)sum->count, (long)sum->remainder, (long)sum->blength,
 475                         sum->s2length, (double)sum->flength);
 476         }
 477 }
 478
 479
 480 /*
 481  * Generate and send a stream of signatures/checksums that describe a buffer
 482  *
 483  * Generate approximately one checksum every block_len bytes.
 484  */
 485 static void generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
 486 {
 487         int32 i;
 488         struct map_struct *mapbuf;
 489         struct sum_struct sum;
 490         OFF_T offset = 0;
 491
 492         sum_sizes_sqroot(&sum, len);
 493         write_sum_head(f_out, &sum);
 494
 495         if (append_mode > 0 && f_copy < 0)
 496                 return;
 497
 498         if (len > 0)
 499                 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
 500         else
 501                 mapbuf = NULL;
 502
 503         for (i = 0; i < sum.count; i++) {
 504                 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
 505                 char *map = map_ptr(mapbuf, offset, n1);
 506                 char sum2[SUM_LENGTH];
 507                 uint32 sum1;
 508
 509                 len -= n1;
 510                 offset += n1;
 511
 512                 if (f_copy >= 0) {
 513                         full_write(f_copy, map, n1);
 514                         if (append_mode > 0)
 515                                 continue;
 516                 }
 517
 518                 sum1 = get_checksum1(map, n1);
 519                 get_checksum2(map, n1, sum2);
 520
 521                 if (verbose > 3) {
 522                         rprintf(FINFO,
 523                                 "chunk[%.0f] offset=%.0f len=%ld sum1=%08lx\n",
 524                                 (double)i, (double)offset - n1, (long)n1,
 525                                 (unsigned long)sum1);
 526                 }
 527                 write_int(f_out, sum1);
 528                 write_buf(f_out, sum2, sum.s2length);
 529         }
 530
 531         if (mapbuf)
 532                 unmap_file(mapbuf);
 533 }
 534
 535
 536 /* Try to find a filename in the same dir as "fname" with a similar name. */
 537 static int find_fuzzy(struct file_struct *file, struct file_list *dirlist)
 538 {
 539         int fname_len, fname_suf_len;
 540         const char *fname_suf, *fname = file->basename;
 541         uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
 542         int j, lowest_j = -1;
 543
 544         fname_len = strlen(fname);
 545         fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
 546
 547         for (j = 0; j < dirlist->count; j++) {
 548                 struct file_struct *fp = dirlist->files[j];
 549                 const char *suf, *name;
 550                 int len, suf_len;
 551                 uint32 dist;
 552
 553                 if (!S_ISREG(fp->mode) || !fp->length
 554                     || fp->flags & FLAG_NO_FUZZY)
 555                         continue;
 556
 557                 name = fp->basename;
 558
 559                 if (fp->length == file->length
 560                     && cmp_modtime(fp->modtime, file->modtime) == 0) {
 561                         if (verbose > 4) {
 562                                 rprintf(FINFO,
 563                                         "fuzzy size/modtime match for %s\n",
 564                                         name);
 565                         }
 566                         return j;
 567                 }
 568
 569                 len = strlen(name);
 570                 suf = find_filename_suffix(name, len, &suf_len);
 571
 572                 dist = fuzzy_distance(name, len, fname, fname_len);
 573                 /* Add some extra weight to how well the suffixes match. */
 574                 dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len)
 575                       * 10;
 576                 if (verbose > 4) {
 577                         rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
 578                                 name, (int)(dist>>16), (int)(dist&0xFFFF));
 579                 }
 580                 if (dist <= lowest_dist) {
 581                         lowest_dist = dist;
 582                         lowest_j = j;
 583                 }
 584         }
 585
 586         return lowest_j;
 587 }
 588
 589 void check_for_finished_hlinks(int itemizing, enum logcode code)
 590 {
 591         struct file_struct *file;
 592         int ndx;
 593
 594         while ((ndx = get_hlink_num()) != -1) {
 595                 if (ndx < 0 || ndx >= the_file_list->count)
 596                         continue;
 597
 598                 file = the_file_list->files[ndx];
 599                 if (!file->link_u.links)
 600                         continue;
 601
 602                 hard_link_cluster(file, ndx, itemizing, code);
 603         }
 604 }
 605
 606 /* This is only called for regular files.  We return -2 if we've finished
 607  * handling the file, -1 if no dest-linking occurred, or a non-negative
 608  * value if we found an alternate basis file. */
 609 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
 610                          char *cmpbuf, STRUCT_STAT *stp, int itemizing,
 611                          int maybe_ATTRS_REPORT, enum logcode code)
 612 {
 613         int best_match = -1;
 614         int match_level = 0;
 615         int j = 0;
 616
 617         do {
 618                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 619                 if (link_stat(cmpbuf, stp, 0) < 0 || !S_ISREG(stp->st_mode))
 620                         continue;
 621                 switch (match_level) {
 622                 case 0:
 623                         best_match = j;
 624                         match_level = 1;
 625                         /* FALL THROUGH */
 626                 case 1:
 627                         if (!unchanged_file(cmpbuf, file, stp))
 628                                 continue;
 629                         best_match = j;
 630                         match_level = 2;
 631                         /* FALL THROUGH */
 632                 case 2:
 633                         if (!unchanged_attrs(file, stp))
 634                                 continue;
 635                         if ((always_checksum || ignore_times)
 636                          && cmp_modtime(stp->st_mtime, file->modtime))
 637                                 continue;
 638                         best_match = j;
 639                         match_level = 3;
 640                         break;
 641                 }
 642                 break;
 643         } while (basis_dir[++j] != NULL);
 644
 645         if (!match_level)
 646                 return -1;
 647
 648         if (j != best_match) {
 649                 j = best_match;
 650                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 651                 if (link_stat(cmpbuf, stp, 0) < 0)
 652                         match_level = 0;
 653         }
 654
 655 #ifdef HAVE_LINK
 656         if (match_level == 3 && !copy_dest) {
 657                 if (link_dest) {
 658                         if (hard_link_one(file, ndx, fname, 0, stp,
 659                                           cmpbuf, 1,
 660                                           itemizing && verbose > 1,
 661                                           code) < 0)
 662                                 goto try_a_copy;
 663                         if (preserve_hard_links && file->link_u.links)
 664                                 hard_link_cluster(file, ndx, itemizing, code);
 665                 } else if (itemizing)
 666                         itemize(file, ndx, 0, stp, 0, 0, NULL);
 667                 if (verbose > 1 && maybe_ATTRS_REPORT) {
 668                         code = daemon_log_format_has_i || dry_run
 669                              ? FCLIENT : FINFO;
 670                         rprintf(code, "%s is uptodate\n", fname);
 671                 }
 672                 return -2;
 673         }
 674 #endif
 675
 676         if (match_level >= 2) {
 677           try_a_copy: /* Copy the file locally. */
 678                 if (copy_file(cmpbuf, fname, file->mode) < 0) {
 679                         if (verbose) {
 680                                 rsyserr(FINFO, errno, "copy_file %s => %s",
 681                                         full_fname(cmpbuf), fname);
 682                         }
 683                         return -1;
 684                 }
 685                 if (itemizing)
 686                         itemize(file, ndx, 0, stp, ITEM_LOCAL_CHANGE, 0, NULL);
 687                 set_file_attrs(fname, file, NULL, 0);
 688                 if (maybe_ATTRS_REPORT
 689                  && ((!itemizing && verbose && match_level == 2)
 690                   || (verbose > 1 && match_level == 3))) {
 691                         code = daemon_log_format_has_i || dry_run
 692                              ? FCLIENT : FINFO;
 693                         rprintf(code, "%s%s\n", fname,
 694                                 match_level == 3 ? " is uptodate" : "");
 695                 }
 696                 if (preserve_hard_links && file->link_u.links)
 697                         hard_link_cluster(file, ndx, itemizing, code);
 698                 return -2;
 699         }
 700
 701         return FNAMECMP_BASIS_DIR_LOW + j;
 702 }
 703
 704 /* This is only called for non-regular files.  We return -2 if we've finished
 705  * handling the file, or -1 if no dest-linking occurred. */
 706 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
 707                          int itemizing, int *possible_ptr,
 708                          int maybe_ATTRS_REPORT, enum logcode code)
 709 {
 710         char fnamebuf[MAXPATHLEN], lnk[MAXPATHLEN];
 711         STRUCT_STAT st;
 712         int len, i = 0;
 713
 714         do {
 715                 pathjoin(fnamebuf, MAXPATHLEN, basis_dir[i], fname);
 716                 if (link_stat(fnamebuf, &st, 0) < 0 || S_ISDIR(st.st_mode)
 717                  || !unchanged_attrs(file, &st))
 718                         continue;
 719                 if (S_ISLNK(file->mode)) {
 720 #ifdef SUPPORT_LINKS
 721                         if ((len = readlink(fnamebuf, lnk, MAXPATHLEN-1)) <= 0)
 722                                 continue;
 723                         lnk[len] = '\0';
 724                         if (strcmp(lnk, file->u.link) != 0)
 725 #endif
 726                                 continue;
 727                 } else {
 728                         if (!IS_DEVICE(st.st_mode) || st.st_rdev != file->u.rdev)
 729                                 continue;
 730                 }
 731                 if (link_dest) {
 732                         if (do_link(fnamebuf, fname) < 0) {
 733                                 /* TODO improve this to be based on errno? */
 734                                 *possible_ptr = 0;
 735                                 break;
 736                         }
 737                         if (preserve_hard_links && file->link_u.links)
 738                                 hard_link_cluster(file, ndx, itemizing, code);
 739                 }
 740                 if (itemizing && log_format_has_i && verbose > 1) {
 741                         int changes = compare_dest ? 0 : ITEM_LOCAL_CHANGE
 742                                     + (link_dest ? ITEM_XNAME_FOLLOWS : 0);
 743                         char *lp = link_dest ? "" : NULL;
 744                         itemize(file, ndx, 0, &st, changes, 0, lp);
 745                 }
 746                 if (verbose > 1 && maybe_ATTRS_REPORT) {
 747                         code = daemon_log_format_has_i || dry_run
 748                              ? FCLIENT : FINFO;
 749                         rprintf(code, "%s is uptodate\n", fname);
 750                 }
 751                 return -2;
 752         } while (basis_dir[++i] != NULL);
 753
 754         return -1;
 755 }
 756
 757 static int phase = 0;
 758
 759 /* Acts on the_file_list->file's ndx'th item, whose name is fname.  If a dir,
 760  * make sure it exists, and has the right permissions/timestamp info.  For
 761  * all other non-regular files (symlinks, etc.) we create them here.  For
 762  * regular files that have changed, we try to find a basis file and then
 763  * start sending checksums.
 764  *
 765  * When fname is non-null, it must point to a MAXPATHLEN buffer!
 766  *
 767  * Note that f_out is set to -1 when doing final directory-permission and
 768  * modification-time repair. */
 769 static void recv_generator(char *fname, struct file_struct *file, int ndx,
 770                            int itemizing, int maybe_ATTRS_REPORT,
 771                            enum logcode code, int f_out)
 772 {
 773         static int missing_below = -1, excluded_below = -1;
 774         static char *fuzzy_dirname = "";
 775         static struct file_list *fuzzy_dirlist = NULL;
 776         struct file_struct *fuzzy_file = NULL;
 777         int fd = -1, f_copy = -1;
 778         STRUCT_STAT st, real_st, partial_st;
 779         struct file_struct *back_file = NULL;
 780         int statret, real_ret, stat_errno;
 781         char *fnamecmp, *partialptr, *backupptr = NULL;
 782         char fnamecmpbuf[MAXPATHLEN];
 783         uchar fnamecmp_type;
 784         int del_opts = DEL_TERSE | (delete_mode ? DEL_FORCE_RECURSE : 0);
 785
 786         if (list_only)
 787                 return;
 788
 789         if (!fname) {
 790                 if (fuzzy_dirlist) {
 791                         flist_free(fuzzy_dirlist);
 792                         fuzzy_dirlist = NULL;
 793                         fuzzy_dirname = "";
 794                 }
 795                 if (missing_below >= 0) {
 796                         dry_run--;
 797                         missing_below = -1;
 798                 }
 799                 return;
 800         }
 801
 802         if (verbose > 2)
 803                 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
 804
 805         if (server_filter_list.head) {
 806                 if (excluded_below >= 0) {
 807                         if (file->dir.depth > excluded_below)
 808                                 goto skipping;
 809                         excluded_below = -1;
 810                 }
 811                 if (check_filter(&server_filter_list, fname,
 812                                  S_ISDIR(file->mode)) < 0) {
 813                         if (S_ISDIR(file->mode))
 814                                 excluded_below = file->dir.depth;
 815                   skipping:
 816                         if (verbose) {
 817                                 rprintf(FINFO,
 818                                         "skipping server-excluded file \"%s\"\n",
 819                                         fname);
 820                         }
 821                         return;
 822                 }
 823         }
 824
 825         if (missing_below >= 0 && file->dir.depth <= missing_below) {
 826                 dry_run--;
 827                 missing_below = -1;
 828         }
 829         if (dry_run > 1) {
 830                 statret = -1;
 831                 stat_errno = ENOENT;
 832         } else {
 833                 if (fuzzy_basis && S_ISREG(file->mode)) {
 834                         char *dn = file->dirname ? file->dirname : ".";
 835                         if (fuzzy_dirname != dn
 836                             && strcmp(fuzzy_dirname, dn) != 0) {
 837                                 if (fuzzy_dirlist)
 838                                         flist_free(fuzzy_dirlist);
 839                                 fuzzy_dirlist = get_dirlist(dn, -1, 1);
 840                         }
 841                         fuzzy_dirname = dn;
 842                 }
 843
 844                 statret = link_stat(fname, &st,
 845                                     keep_dirlinks && S_ISDIR(file->mode));
 846                 stat_errno = errno;
 847         }
 848
 849         if (ignore_non_existing && statret == -1 && stat_errno == ENOENT) {
 850                 if (verbose > 1) {
 851                         rprintf(FINFO, "not creating new %s \"%s\"\n",
 852                                 S_ISDIR(file->mode) ? "directory" : "file",
 853                                 fname);
 854                 }
 855                 return;
 856         }
 857
 858         if (statret == 0 && !preserve_perms
 859             && S_ISDIR(st.st_mode) == S_ISDIR(file->mode)) {
 860                 /* if the file exists already and we aren't perserving
 861                  * permissions then act as though the remote end sent
 862                  * us the file permissions we already have */
 863                 file->mode = (file->mode & ~CHMOD_BITS)
 864                            | (st.st_mode & CHMOD_BITS);
 865         }
 866
 867         if (S_ISDIR(file->mode)) {
 868                 /* The file to be received is a directory, so we need
 869                  * to prepare appropriately.  If there is already a
 870                  * file of that name and it is *not* a directory, then
 871                  * we need to delete it.  If it doesn't exist, then
 872                  * (perhaps recursively) create it. */
 873                 if (statret == 0 && !S_ISDIR(st.st_mode)) {
 874                         if (delete_item(fname, st.st_mode, del_opts) < 0)
 875                                 return;
 876                         statret = -1;
 877                 }
 878                 if (dry_run && statret != 0 && missing_below < 0) {
 879                         missing_below = file->dir.depth;
 880                         dry_run++;
 881                 }
 882                 if (itemizing && f_out != -1) {
 883                         itemize(file, ndx, statret, &st,
 884                                 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
 885                 }
 886                 if (statret != 0 && do_mkdir(fname,file->mode) < 0 && errno != EEXIST) {
 887                         if (!relative_paths || errno != ENOENT
 888                             || create_directory_path(fname, orig_umask) < 0
 889                             || (do_mkdir(fname, file->mode) < 0 && errno != EEXIST)) {
 890                                 rsyserr(FERROR, errno,
 891                                         "recv_generator: mkdir %s failed",
 892                                         full_fname(fname));
 893                         }
 894                 }
 895                 if (set_file_attrs(fname, file, statret ? NULL : &st, 0)
 896                     && verbose && code && f_out != -1)
 897                         rprintf(code, "%s/\n", fname);
 898                 if (delete_during && f_out != -1 && !phase && dry_run < 2
 899                     && (file->flags & FLAG_DEL_HERE))
 900                         delete_in_dir(the_file_list, fname, file, &st);
 901                 return;
 902         }
 903
 904         if (preserve_hard_links && file->link_u.links
 905             && hard_link_check(file, ndx, fname, statret, &st,
 906                                itemizing, code, HL_CHECK_MASTER))
 907                 return;
 908
 909         if (preserve_links && S_ISLNK(file->mode)) {
 910 #ifdef SUPPORT_LINKS
 911                 if (safe_symlinks && unsafe_symlink(file->u.link, fname)) {
 912                         if (verbose) {
 913                                 if (the_file_list->count == 1)
 914                                         fname = f_name(file, NULL);
 915                                 rprintf(FINFO,
 916                                         "ignoring unsafe symlink %s -> \"%s\"\n",
 917                                         full_fname(fname), file->u.link);
 918                         }
 919                         return;
 920                 }
 921                 if (statret == 0) {
 922                         char lnk[MAXPATHLEN];
 923                         int len;
 924
 925                         if (!S_ISDIR(st.st_mode)
 926                             && (len = readlink(fname, lnk, MAXPATHLEN-1)) > 0) {
 927                                 lnk[len] = 0;
 928                                 /* A link already pointing to the
 929                                  * right place -- no further action
 930                                  * required. */
 931                                 if (strcmp(lnk, file->u.link) == 0) {
 932                                         if (itemizing) {
 933                                                 itemize(file, ndx, 0, &st, 0,
 934                                                         0, NULL);
 935                                         }
 936                                         set_file_attrs(fname, file, &st,
 937                                                        maybe_ATTRS_REPORT);
 938                                         if (preserve_hard_links
 939                                             && file->link_u.links) {
 940                                                 hard_link_cluster(file, ndx,
 941                                                                   itemizing,
 942                                                                   code);
 943                                         }
 944                                         return;
 945                                 }
 946                         }
 947                         /* Not the right symlink (or not a symlink), so
 948                          * delete it. */
 949                         if (delete_item(fname, st.st_mode, del_opts) < 0)
 950                                 return;
 951                         if (!S_ISLNK(st.st_mode))
 952                                 statret = -1;
 953                 } else if (basis_dir[0] != NULL && can_link_symlinks) {
 954                         if (try_dests_non(file, fname, ndx, itemizing,
 955                                           &can_link_symlinks,
 956                                           maybe_ATTRS_REPORT, code) == -2) {
 957                                 if (!copy_dest)
 958                                         return;
 959                                 itemizing = code = 0;
 960                         }
 961                 }
 962                 if (preserve_hard_links && file->link_u.links
 963                     && hard_link_check(file, ndx, fname, -1, &st,
 964                                        itemizing, code, HL_SKIP))
 965                         return;
 966                 if (do_symlink(file->u.link,fname) != 0) {
 967                         rsyserr(FERROR, errno, "symlink %s -> \"%s\" failed",
 968                                 full_fname(fname), file->u.link);
 969                 } else {
 970                         set_file_attrs(fname, file, NULL, 0);
 971                         if (itemizing) {
 972                                 itemize(file, ndx, statret, &st,
 973                                         ITEM_LOCAL_CHANGE, 0, NULL);
 974                         }
 975                         if (code && verbose) {
 976                                 rprintf(code, "%s -> %s\n", fname,
 977                                         file->u.link);
 978                         }
 979                         if (remove_sent_files && !dry_run) {
 980                                 char numbuf[4];
 981                                 SIVAL(numbuf, 0, ndx);
 982                                 send_msg(MSG_SUCCESS, numbuf, 4);
 983                         }
 984                         if (preserve_hard_links && file->link_u.links)
 985                                 hard_link_cluster(file, ndx, itemizing, code);
 986                 }
 987 #endif
 988                 return;
 989         }
 990
 991         if ((am_root && preserve_devices && IS_DEVICE(file->mode))
 992          || (preserve_specials && IS_SPECIAL(file->mode))) {
 993                 if (statret != 0
 994                  && (basis_dir[0] != NULL && can_link_devices)) {
 995                         if (try_dests_non(file, fname, ndx, itemizing,
 996                                           &can_link_devices,
 997                                           maybe_ATTRS_REPORT, code) == -2) {
 998                                 if (!copy_dest)
 999                                         return;
1000                                 itemizing = code = 0;
1001                         }
1002                 }
1003                 if (statret != 0
1004                  || (st.st_mode & ~CHMOD_BITS) != (file->mode & ~CHMOD_BITS)
1005                  || st.st_rdev != file->u.rdev) {
1006                         if (statret == 0
1007                          && delete_item(fname, st.st_mode, del_opts) < 0)
1008                                 return;
1009                         if (preserve_hard_links && file->link_u.links
1010                             && hard_link_check(file, ndx, fname, -1, &st,
1011                                                itemizing, code, HL_SKIP))
1012                                 return;
1013                         if ((IS_DEVICE(file->mode) && !IS_DEVICE(st.st_mode))
1014                          || (IS_SPECIAL(file->mode) && !IS_SPECIAL(st.st_mode)))
1015                                 statret = -1;
1016                         if (verbose > 2) {
1017                                 rprintf(FINFO,"mknod(%s,0%o,0x%x)\n",
1018                                         fname,
1019                                         (int)file->mode, (int)file->u.rdev);
1020                         }
1021                         if (do_mknod(fname,file->mode,file->u.rdev) < 0) {
1022                                 rsyserr(FERROR, errno, "mknod %s failed",
1023                                         full_fname(fname));
1024                         } else {
1025                                 set_file_attrs(fname, file, NULL, 0);
1026                                 if (itemizing) {
1027                                         itemize(file, ndx, statret, &st,
1028                                                 ITEM_LOCAL_CHANGE, 0, NULL);
1029                                 }
1030                                 if (code && verbose)
1031                                         rprintf(code, "%s\n", fname);
1032                                 if (preserve_hard_links && file->link_u.links) {
1033                                         hard_link_cluster(file, ndx,
1034                                                           itemizing, code);
1035                                 }
1036                         }
1037                 } else {
1038                         if (itemizing)
1039                                 itemize(file, ndx, statret, &st, 0, 0, NULL);
1040                         set_file_attrs(fname, file, &st, maybe_ATTRS_REPORT);
1041                         if (preserve_hard_links && file->link_u.links)
1042                                 hard_link_cluster(file, ndx, itemizing, code);
1043                 }
1044                 return;
1045         }
1046
1047         if (!S_ISREG(file->mode)) {
1048                 if (the_file_list->count == 1)
1049                         fname = f_name(file, NULL);
1050                 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1051                 return;
1052         }
1053
1054         if (max_size && file->length > max_size) {
1055                 if (verbose > 1) {
1056                         if (the_file_list->count == 1)
1057                                 fname = f_name(file, NULL);
1058                         rprintf(FINFO, "%s is over max-size\n", fname);
1059                 }
1060                 return;
1061         }
1062         if (min_size && file->length < min_size) {
1063                 if (verbose > 1) {
1064                         if (the_file_list->count == 1)
1065                                 fname = f_name(file, NULL);
1066                         rprintf(FINFO, "%s is under min-size\n", fname);
1067                 }
1068                 return;
1069         }
1070
1071         if (ignore_existing && statret == 0) {
1072                 if (verbose > 1)
1073                         rprintf(FINFO, "%s exists\n", fname);
1074                 return;
1075         }
1076
1077         if (update_only && statret == 0
1078             && cmp_modtime(st.st_mtime, file->modtime) > 0) {
1079                 if (verbose > 1)
1080                         rprintf(FINFO, "%s is newer\n", fname);
1081                 return;
1082         }
1083
1084         fnamecmp = fname;
1085         fnamecmp_type = FNAMECMP_FNAME;
1086
1087         if (statret == 0 && !S_ISREG(st.st_mode)) {
1088                 if (delete_item(fname, st.st_mode, del_opts) != 0)
1089                         return;
1090                 statret = -1;
1091                 stat_errno = ENOENT;
1092         }
1093
1094         if (statret != 0 && basis_dir[0] != NULL) {
1095                 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &st,
1096                                       itemizing, maybe_ATTRS_REPORT, code);
1097                 if (j == -2)
1098                         return;
1099                 if (j != -1) {
1100                         fnamecmp = fnamecmpbuf;
1101                         fnamecmp_type = j;
1102                         statret = 0;
1103                 }
1104         }
1105
1106         real_ret = statret;
1107         real_st = st;
1108
1109         if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1110             && link_stat(partialptr, &partial_st, 0) == 0
1111             && S_ISREG(partial_st.st_mode)) {
1112                 if (statret != 0)
1113                         goto prepare_to_open;
1114         } else
1115                 partialptr = NULL;
1116
1117         if (statret != 0 && fuzzy_basis && dry_run <= 1) {
1118                 int j = find_fuzzy(file, fuzzy_dirlist);
1119                 if (j >= 0) {
1120                         fuzzy_file = fuzzy_dirlist->files[j];
1121                         f_name(fuzzy_file, fnamecmpbuf);
1122                         if (verbose > 2) {
1123                                 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1124                                         fname, fnamecmpbuf);
1125                         }
1126                         st.st_size = fuzzy_file->length;
1127                         statret = 0;
1128                         fnamecmp = fnamecmpbuf;
1129                         fnamecmp_type = FNAMECMP_FUZZY;
1130                 }
1131         }
1132
1133         if (statret != 0) {
1134                 if (preserve_hard_links && file->link_u.links
1135                     && hard_link_check(file, ndx, fname, statret, &st,
1136                                        itemizing, code, HL_SKIP))
1137                         return;
1138                 if (stat_errno == ENOENT)
1139                         goto notify_others;
1140                 rsyserr(FERROR, stat_errno, "recv_generator: failed to stat %s",
1141                         full_fname(fname));
1142                 return;
1143         }
1144
1145         if (append_mode && st.st_size > file->length)
1146                 return;
1147
1148         if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1149                 ;
1150         else if (fnamecmp_type == FNAMECMP_FUZZY)
1151                 ;
1152         else if (unchanged_file(fnamecmp, file, &st)) {
1153                 if (partialptr) {
1154                         do_unlink(partialptr);
1155                         handle_partial_dir(partialptr, PDIR_DELETE);
1156                 }
1157                 if (itemizing) {
1158                         itemize(file, ndx, real_ret, &real_st,
1159                                 0, 0, NULL);
1160                 }
1161                 set_file_attrs(fname, file, &st, maybe_ATTRS_REPORT);
1162                 if (preserve_hard_links && file->link_u.links)
1163                         hard_link_cluster(file, ndx, itemizing, code);
1164                 return;
1165         }
1166
1167   prepare_to_open:
1168         if (partialptr) {
1169                 st = partial_st;
1170                 fnamecmp = partialptr;
1171                 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1172                 statret = 0;
1173         }
1174
1175         if (!do_xfers || read_batch || whole_file)
1176                 goto notify_others;
1177
1178         if (fuzzy_basis) {
1179                 int j = flist_find(fuzzy_dirlist, file);
1180                 if (j >= 0) /* don't use changing file as future fuzzy basis */
1181                         fuzzy_dirlist->files[j]->flags |= FLAG_NO_FUZZY;
1182         }
1183
1184         /* open the file */
1185         fd = do_open(fnamecmp, O_RDONLY, 0);
1186
1187         if (fd == -1) {
1188                 rsyserr(FERROR, errno, "failed to open %s, continuing",
1189                         full_fname(fnamecmp));
1190           pretend_missing:
1191                 /* pretend the file didn't exist */
1192                 if (preserve_hard_links && file->link_u.links
1193                     && hard_link_check(file, ndx, fname, statret, &st,
1194                                        itemizing, code, HL_SKIP))
1195                         return;
1196                 statret = real_ret = -1;
1197                 goto notify_others;
1198         }
1199
1200         if (inplace && make_backups && fnamecmp_type == FNAMECMP_FNAME) {
1201                 if (!(backupptr = get_backup_name(fname))) {
1202                         close(fd);
1203                         return;
1204                 }
1205                 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1206                         close(fd);
1207                         goto pretend_missing;
1208                 }
1209                 if (robust_unlink(backupptr) && errno != ENOENT) {
1210                         rsyserr(FERROR, errno, "unlink %s",
1211                                 full_fname(backupptr));
1212                         free(back_file);
1213                         close(fd);
1214                         return;
1215                 }
1216                 if ((f_copy = do_open(backupptr,
1217                     O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1218                         rsyserr(FERROR, errno, "open %s",
1219                                 full_fname(backupptr));
1220                         free(back_file);
1221                         close(fd);
1222                         return;
1223                 }
1224                 fnamecmp_type = FNAMECMP_BACKUP;
1225         }
1226
1227         if (verbose > 3) {
1228                 rprintf(FINFO, "gen mapped %s of size %.0f\n",
1229                         fnamecmp, (double)st.st_size);
1230         }
1231
1232         if (verbose > 2)
1233                 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1234
1235   notify_others:
1236         write_int(f_out, ndx);
1237         if (itemizing) {
1238                 int iflags = ITEM_TRANSFER;
1239                 if (always_checksum)
1240                         iflags |= ITEM_REPORT_CHECKSUM;
1241                 if (fnamecmp_type != FNAMECMP_FNAME)
1242                         iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1243                 if (fnamecmp_type == FNAMECMP_FUZZY)
1244                         iflags |= ITEM_XNAME_FOLLOWS;
1245                 itemize(file, -1, real_ret, &real_st, iflags, fnamecmp_type,
1246                         fuzzy_file ? fuzzy_file->basename : NULL);
1247         }
1248
1249         if (!do_xfers) {
1250                 if (preserve_hard_links && file->link_u.links)
1251                         hard_link_cluster(file, ndx, itemizing, code);
1252                 return;
1253         }
1254         if (read_batch)
1255                 return;
1256
1257         if (statret != 0 || whole_file) {
1258                 write_sum_head(f_out, NULL);
1259                 return;
1260         }
1261
1262         generate_and_send_sums(fd, st.st_size, f_out, f_copy);
1263
1264         if (f_copy >= 0) {
1265                 close(f_copy);
1266                 set_file_attrs(backupptr, back_file, NULL, 0);
1267                 if (verbose > 1) {
1268                         rprintf(FINFO, "backed up %s to %s\n",
1269                                 fname, backupptr);
1270                 }
1271                 free(back_file);
1272         }
1273
1274         close(fd);
1275 }
1276
1277 void generate_files(int f_out, struct file_list *flist, char *local_name)
1278 {
1279         int i;
1280         char fbuf[MAXPATHLEN];
1281         int itemizing, maybe_ATTRS_REPORT;
1282         enum logcode code;
1283         int lull_mod = allowed_lull * 5;
1284         int need_retouch_dir_times = preserve_times && !omit_dir_times;
1285         int need_retouch_dir_perms = 0;
1286         int save_ignore_existing = ignore_existing;
1287         int save_ignore_non_existing = ignore_non_existing;
1288         int save_do_progress = do_progress;
1289         int save_make_backups = make_backups;
1290
1291         if (protocol_version >= 29) {
1292                 itemizing = 1;
1293                 maybe_ATTRS_REPORT = log_format_has_i ? 0 : ATTRS_REPORT;
1294                 code = daemon_log_format_has_i ? 0 : FLOG;
1295         } else if (am_daemon) {
1296                 itemizing = daemon_log_format_has_i && do_xfers;
1297                 maybe_ATTRS_REPORT = ATTRS_REPORT;
1298                 code = itemizing || !do_xfers ? FCLIENT : FINFO;
1299         } else if (!am_server) {
1300                 itemizing = log_format_has_i;
1301                 maybe_ATTRS_REPORT = log_format_has_i ? 0 : ATTRS_REPORT;
1302                 code = itemizing ? 0 : FINFO;
1303         } else {
1304                 itemizing = 0;
1305                 maybe_ATTRS_REPORT = ATTRS_REPORT;
1306                 code = FINFO;
1307         }
1308
1309         if (verbose > 2) {
1310                 rprintf(FINFO, "generator starting pid=%ld count=%d\n",
1311                         (long)getpid(), flist->count);
1312         }
1313
1314         if (delete_before && !local_name && flist->count > 0)
1315                 do_delete_pass(flist);
1316         do_progress = 0;
1317
1318         if (append_mode || whole_file < 0)
1319                 whole_file = 0;
1320         if (verbose >= 2) {
1321                 rprintf(FINFO, "delta-transmission %s\n",
1322                         whole_file
1323                         ? "disabled for local transfer or --whole-file"
1324                         : "enabled");
1325         }
1326
1327         /* Since we often fill up the outgoing socket and then just sit around
1328          * waiting for the other 2 processes to do their thing, we don't want
1329          * to exit on a timeout.  If the data stops flowing, the receiver will
1330          * notice that and let us know via the redo pipe (or its closing). */
1331         ignore_timeout = 1;
1332
1333         for (i = 0; i < flist->count; i++) {
1334                 struct file_struct *file = flist->files[i];
1335
1336                 if (!file->basename)
1337                         continue;
1338
1339                 if (local_name)
1340                         strlcpy(fbuf, local_name, sizeof fbuf);
1341                 else
1342                         f_name(file, fbuf);
1343                 recv_generator(fbuf, file, i, itemizing, maybe_ATTRS_REPORT,
1344                                code, f_out);
1345
1346                 /* We need to ensure that any dirs we create have writeable
1347                  * permissions during the time we are putting files within
1348                  * them.  This is then fixed after the transfer is done. */
1349 #ifdef HAVE_CHMOD
1350                 if (!am_root && S_ISDIR(file->mode) && !(file->mode & S_IWUSR)
1351                     && !list_only) {
1352                         mode_t mode = file->mode | S_IWUSR; /* user write */
1353                         char *fname = local_name ? local_name : fbuf;
1354                         if (do_chmod(fname, mode) < 0) {
1355                                 rsyserr(FERROR, errno,
1356                                         "failed to modify permissions on %s",
1357                                         full_fname(fname));
1358                         }
1359                         need_retouch_dir_perms = 1;
1360                 }
1361 #endif
1362
1363                 if (preserve_hard_links)
1364                         check_for_finished_hlinks(itemizing, code);
1365
1366                 if (allowed_lull && !(i % lull_mod))
1367                         maybe_send_keepalive();
1368                 else if (!(i % 200))
1369                         maybe_flush_socket();
1370         }
1371         recv_generator(NULL, NULL, 0, 0, 0, code, -1);
1372         if (delete_during)
1373                 delete_in_dir(NULL, NULL, NULL, NULL);
1374
1375         phase++;
1376         csum_length = SUM_LENGTH;
1377         max_size = min_size = ignore_existing = ignore_non_existing = 0;
1378         update_only = always_checksum = size_only = 0;
1379         ignore_times = 1;
1380         if (append_mode)  /* resend w/o append mode */
1381                 append_mode = -1; /* ... but only longer files */
1382         make_backups = 0; /* avoid a duplicate backup for inplace processing */
1383
1384         if (verbose > 2)
1385                 rprintf(FINFO,"generate_files phase=%d\n",phase);
1386
1387         write_int(f_out, -1);
1388
1389         /* files can cycle through the system more than once
1390          * to catch initial checksum errors */
1391         while ((i = get_redo_num(itemizing, code)) != -1) {
1392                 struct file_struct *file = flist->files[i];
1393                 if (local_name)
1394                         strlcpy(fbuf, local_name, sizeof fbuf);
1395                 else
1396                         f_name(file, fbuf);
1397                 recv_generator(fbuf, file, i, itemizing, maybe_ATTRS_REPORT,
1398                                code, f_out);
1399         }
1400
1401         phase++;
1402         ignore_non_existing = save_ignore_non_existing;
1403         ignore_existing = save_ignore_existing;
1404         make_backups = save_make_backups;
1405
1406         if (verbose > 2)
1407                 rprintf(FINFO,"generate_files phase=%d\n",phase);
1408
1409         write_int(f_out, -1);
1410         /* Reduce round-trip lag-time for a useless delay-updates phase. */
1411         if (protocol_version >= 29 && !delay_updates)
1412                 write_int(f_out, -1);
1413
1414         /* Read MSG_DONE for the redo phase (and any prior messages). */
1415         get_redo_num(itemizing, code);
1416
1417         if (protocol_version >= 29) {
1418                 phase++;
1419                 if (verbose > 2)
1420                         rprintf(FINFO, "generate_files phase=%d\n", phase);
1421                 if (delay_updates)
1422                         write_int(f_out, -1);
1423                 /* Read MSG_DONE for delay-updates phase & prior messages. */
1424                 get_redo_num(itemizing, code);
1425         }
1426
1427         do_progress = save_do_progress;
1428         if (delete_after && !local_name && flist->count > 0)
1429                 do_delete_pass(flist);
1430
1431         if ((need_retouch_dir_perms || need_retouch_dir_times)
1432             && !list_only && !local_name && !dry_run) {
1433                 int j = 0;
1434                 /* Now we need to fix any directory permissions that were
1435                  * modified during the transfer and/or re-set any tweaked
1436                  * modified-time values. */
1437                 for (i = 0; i < flist->count; i++) {
1438                         struct file_struct *file = flist->files[i];
1439
1440                         if (!file->basename || !S_ISDIR(file->mode))
1441                                 continue;
1442                         if (!need_retouch_dir_times && file->mode & S_IWUSR)
1443                                 continue;
1444                         recv_generator(f_name(file, NULL), file, i, itemizing,
1445                                        maybe_ATTRS_REPORT, code, -1);
1446                         if (allowed_lull && !(++j % lull_mod))
1447                                 maybe_send_keepalive();
1448                         else if (!(j % 200))
1449                                 maybe_flush_socket();
1450                 }
1451         }
1452         recv_generator(NULL, NULL, 0, 0, 0, code, -1);
1453
1454         if (max_delete > 0 && deletion_count > max_delete) {
1455                 rprintf(FINFO,
1456                         "Deletions stopped due to --max-delete limit (%d skipped)\n",
1457                         deletion_count - max_delete);
1458                 io_error |= IOERR_DEL_LIMIT;
1459         }
1460
1461         if (verbose > 2)
1462                 rprintf(FINFO,"generate_files finished\n");
1463 }