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