generator.c

   1 /*
   2  * Routines that are exclusive to the generator process.
   3  *
   4  * Copyright (C) 1996-2000 Andrew Tridgell
   5  * Copyright (C) 1996 Paul Mackerras
   6  * Copyright (C) 2002 Martin Pool <mbp@samba.org>
   7  * Copyright (C) 2003, 2004, 2005, 2006 Wayne Davison
   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 along
  20  * with this program; if not, write to the Free Software Foundation, Inc.,
  21  * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, 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 stdout_format_has_i;
  30 extern int logfile_format_has_i;
  31 extern int am_root;
  32 extern int am_server;
  33 extern int am_daemon;
  34 extern int do_progress;
  35 extern int relative_paths;
  36 extern int implied_dirs;
  37 extern int keep_dirlinks;
  38 extern int preserve_links;
  39 extern int preserve_devices;
  40 extern int preserve_specials;
  41 extern int preserve_hard_links;
  42 extern int preserve_perms;
  43 extern int preserve_uid;
  44 extern int preserve_gid;
  45 extern int preserve_times;
  46 extern int omit_dir_times;
  47 extern int delete_mode;
  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_sender_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 safe_symlinks;
  83 extern long block_size; /* "long" because popt can't set an int32. */
  84 extern int max_delete;
  85 extern int force_delete;
  86 extern int one_file_system;
  87 extern struct stats stats;
  88 extern dev_t filesystem_dev;
  89 extern char *backup_dir;
  90 extern char *backup_suffix;
  91 extern int backup_suffix_len;
  92 extern struct file_list *the_file_list;
  93 extern struct filter_list_struct server_filter_list;
  94
  95 static int deletion_count = 0; /* used to implement --max-delete */
  96
  97 /* For calling delete_file() */
  98 #define DEL_FORCE_RECURSE       (1<<1) /* recurse even w/o --force */
  99 #define DEL_TERSE               (1<<3)
 100
 101
 102 static int is_backup_file(char *fn)
 103 {
 104         int k = strlen(fn) - backup_suffix_len;
 105         return k > 0 && strcmp(fn+k, backup_suffix) == 0;
 106 }
 107
 108
 109 /* Delete a file or directory.  If DEL_FORCE_RECURSE is set in the flags, or if
 110  * force_delete is set, this will delete recursively.
 111  *
 112  * Note that fname must point to a MAXPATHLEN buffer if the mode indicates it's
 113  * a directory! (The buffer is used for recursion, but returned unchanged.)
 114  */
 115 static int delete_item(char *fname, int mode, int flags)
 116 {
 117         struct file_list *dirlist;
 118         int j, dlen, zap_dir, ok;
 119         unsigned remainder;
 120         void *save_filters;
 121         char *p;
 122
 123         if (!S_ISDIR(mode)) {
 124                 if (max_delete && ++deletion_count > max_delete)
 125                         return 0;
 126                 if (make_backups && (backup_dir || !is_backup_file(fname)))
 127                         ok = make_backup(fname);
 128                 else
 129                         ok = robust_unlink(fname) == 0;
 130                 if (ok) {
 131                         if (!(flags & DEL_TERSE))
 132                                 log_delete(fname, mode);
 133                         return 0;
 134                 }
 135                 if (errno == ENOENT) {
 136                         deletion_count--;
 137                         return 0;
 138                 }
 139                 rsyserr(FERROR, errno, "delete_file: unlink %s failed",
 140                         full_fname(fname));
 141                 return -1;
 142         }
 143
 144         zap_dir = flags & DEL_FORCE_RECURSE || force_delete;
 145         if ((max_delete && ++deletion_count > max_delete)
 146             || (dry_run && zap_dir)) {
 147                 ok = 0;
 148                 errno = ENOTEMPTY;
 149         } else if (make_backups && !backup_dir && !is_backup_file(fname)
 150             && !(flags & DEL_FORCE_RECURSE))
 151                 ok = make_backup(fname);
 152         else
 153                 ok = do_rmdir(fname) == 0;
 154         if (ok) {
 155                 if (!(flags & DEL_TERSE))
 156                         log_delete(fname, mode);
 157                 return 0;
 158         }
 159         if (errno == ENOENT) {
 160                 deletion_count--;
 161                 return 0;
 162         }
 163         if (!zap_dir) {
 164                 rsyserr(FERROR, errno, "delete_file: rmdir %s failed",
 165                         full_fname(fname));
 166                 return -1;
 167         }
 168         flags |= DEL_FORCE_RECURSE; /* mark subdir dels as not "in the way" */
 169         deletion_count--;
 170
 171         dlen = strlen(fname);
 172         save_filters = push_local_filters(fname, dlen);
 173
 174         dirlist = get_dirlist(fname, dlen, 0);
 175
 176         p = fname + dlen;
 177         if (dlen != 1 || *fname != '/')
 178                 *p++ = '/';
 179         remainder = MAXPATHLEN - (p - fname);
 180
 181         for (j = dirlist->count; j--; ) {
 182                 struct file_struct *fp = dirlist->files[j];
 183
 184                 if (fp->flags & FLAG_MOUNT_POINT)
 185                         continue;
 186
 187                 strlcpy(p, fp->basename, remainder);
 188                 delete_item(fname, fp->mode, flags & ~DEL_TERSE);
 189         }
 190         flist_free(dirlist);
 191
 192         fname[dlen] = '\0';
 193
 194         pop_local_filters(save_filters);
 195
 196         if (max_delete && ++deletion_count > max_delete)
 197                 return 0;
 198
 199         if (do_rmdir(fname) == 0) {
 200                 if (!(flags & DEL_TERSE))
 201                         log_delete(fname, mode);
 202         } else if (errno != ENOTEMPTY && errno != EEXIST && errno != ENOENT) {
 203                 rsyserr(FERROR, errno, "delete_file: rmdir %s failed",
 204                         full_fname(fname));
 205                 return -1;
 206         }
 207
 208         return 0;
 209 }
 210
 211
 212 /* This function is used to implement per-directory deletion, and is used by
 213  * all the --delete-WHEN options.  Note that the fbuf pointer must point to a
 214  * MAXPATHLEN buffer with the name of the directory in it (the functions we
 215  * call will append names onto the end, but the old dir value will be restored
 216  * on exit). */
 217 static void delete_in_dir(struct file_list *flist, char *fbuf,
 218                           struct file_struct *file, STRUCT_STAT *stp)
 219 {
 220         static int min_depth = MAXPATHLEN, cur_depth = -1;
 221         static void *filt_array[MAXPATHLEN/2+1];
 222         static int already_warned = 0;
 223         struct file_list *dirlist;
 224         char delbuf[MAXPATHLEN];
 225         int dlen, i;
 226
 227         if (!flist) {
 228                 while (cur_depth >= min_depth)
 229                         pop_local_filters(filt_array[cur_depth--]);
 230                 min_depth = MAXPATHLEN;
 231                 cur_depth = -1;
 232                 return;
 233         }
 234
 235         if (verbose > 2)
 236                 rprintf(FINFO, "delete_in_dir(%s)\n", fbuf);
 237
 238         if (allowed_lull)
 239                 maybe_send_keepalive();
 240
 241         if (file->dir.depth >= MAXPATHLEN/2+1)
 242                 return; /* Impossible... */
 243
 244         if (io_error && !(lp_ignore_errors(module_id) || ignore_errors)) {
 245                 if (already_warned)
 246                         return;
 247                 rprintf(FINFO,
 248                         "IO error encountered -- skipping file deletion\n");
 249                 already_warned = 1;
 250                 return;
 251         }
 252
 253         while (cur_depth >= file->dir.depth && cur_depth >= min_depth)
 254                 pop_local_filters(filt_array[cur_depth--]);
 255         cur_depth = file->dir.depth;
 256         if (min_depth > cur_depth)
 257                 min_depth = cur_depth;
 258         dlen = strlen(fbuf);
 259         filt_array[cur_depth] = push_local_filters(fbuf, dlen);
 260
 261         if (one_file_system) {
 262                 if (file->flags & FLAG_TOP_DIR)
 263                         filesystem_dev = stp->st_dev;
 264                 else if (filesystem_dev != stp->st_dev)
 265                         return;
 266         }
 267
 268         dirlist = get_dirlist(fbuf, dlen, 0);
 269
 270         /* If an item in dirlist is not found in flist, delete it
 271          * from the filesystem. */
 272         for (i = dirlist->count; i--; ) {
 273                 struct file_struct *fp = dirlist->files[i];
 274                 if (!fp->basename || fp->flags & FLAG_MOUNT_POINT)
 275                         continue;
 276                 if (flist_find(flist, fp) < 0) {
 277                         f_name(fp, delbuf);
 278                         delete_item(delbuf, fp->mode, DEL_FORCE_RECURSE);
 279                 }
 280         }
 281
 282         flist_free(dirlist);
 283 }
 284
 285 /* This deletes any files on the receiving side that are not present on the
 286  * sending side.  This is used by --delete-before and --delete-after. */
 287 static void do_delete_pass(struct file_list *flist)
 288 {
 289         char fbuf[MAXPATHLEN];
 290         STRUCT_STAT st;
 291         int j;
 292
 293         /* dry_run is incremented when the destination doesn't exist yet. */
 294         if (dry_run > 1 || list_only)
 295                 return;
 296
 297         for (j = 0; j < flist->count; j++) {
 298                 struct file_struct *file = flist->files[j];
 299
 300                 if (!(file->flags & FLAG_DEL_HERE))
 301                         continue;
 302
 303                 f_name(file, fbuf);
 304                 if (verbose > 1 && file->flags & FLAG_TOP_DIR)
 305                         rprintf(FINFO, "deleting in %s\n", fbuf);
 306
 307                 if (link_stat(fbuf, &st, keep_dirlinks) < 0
 308                  || !S_ISDIR(st.st_mode))
 309                         continue;
 310
 311                 delete_in_dir(flist, fbuf, file, &st);
 312         }
 313         delete_in_dir(NULL, NULL, NULL, NULL);
 314
 315         if (do_progress && !am_server)
 316                 rprintf(FINFO, "                    \r");
 317 }
 318
 319 int unchanged_attrs(struct file_struct *file, STRUCT_STAT *st)
 320 {
 321         if (preserve_perms
 322          && (st->st_mode & CHMOD_BITS) != (file->mode & CHMOD_BITS))
 323                 return 0;
 324
 325         if (am_root && preserve_uid && st->st_uid != file->uid)
 326                 return 0;
 327
 328         if (preserve_gid && file->gid != GID_NONE && st->st_gid != file->gid)
 329                 return 0;
 330
 331         return 1;
 332 }
 333
 334 void itemize(struct file_struct *file, int ndx, int statret, STRUCT_STAT *st,
 335              int32 iflags, uchar fnamecmp_type, char *xname)
 336 {
 337         if (statret >= 0) { /* A from-dest-dir statret can == 1! */
 338                 int keep_time = !preserve_times ? 0
 339                     : S_ISDIR(file->mode) ? !omit_dir_times
 340                     : !S_ISLNK(file->mode);
 341
 342                 if (S_ISREG(file->mode) && file->length != st->st_size)
 343                         iflags |= ITEM_REPORT_SIZE;
 344                 if ((iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !keep_time
 345                      && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
 346                     || (keep_time && cmp_time(file->modtime, st->st_mtime) != 0))
 347                         iflags |= ITEM_REPORT_TIME;
 348                 if ((file->mode & CHMOD_BITS) != (st->st_mode & CHMOD_BITS))
 349                         iflags |= ITEM_REPORT_PERMS;
 350                 if (preserve_uid && am_root && file->uid != st->st_uid)
 351                         iflags |= ITEM_REPORT_OWNER;
 352                 if (preserve_gid && file->gid != GID_NONE
 353                     && st->st_gid != file->gid)
 354                         iflags |= ITEM_REPORT_GROUP;
 355         } else
 356                 iflags |= ITEM_IS_NEW;
 357
 358         iflags &= 0xffff;
 359         if ((iflags & SIGNIFICANT_ITEM_FLAGS || verbose > 1
 360           || stdout_format_has_i > 1 || (xname && *xname)) && !read_batch) {
 361                 if (protocol_version >= 29) {
 362                         if (ndx >= 0)
 363                                 write_int(sock_f_out, ndx);
 364                         write_shortint(sock_f_out, iflags);
 365                         if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
 366                                 write_byte(sock_f_out, fnamecmp_type);
 367                         if (iflags & ITEM_XNAME_FOLLOWS)
 368                                 write_vstring(sock_f_out, xname, strlen(xname));
 369                 } else if (ndx >= 0) {
 370                         enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
 371                         log_item(code, file, &stats, iflags, xname);
 372                 }
 373         }
 374 }
 375
 376
 377 /* Perform our quick-check heuristic for determining if a file is unchanged. */
 378 int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
 379 {
 380         if (st->st_size != file->length)
 381                 return 0;
 382
 383         /* if always checksum is set then we use the checksum instead
 384            of the file time to determine whether to sync */
 385         if (always_checksum && S_ISREG(st->st_mode)) {
 386                 char sum[MD4_SUM_LENGTH];
 387                 file_checksum(fn, sum, st->st_size);
 388                 return memcmp(sum, file->u.sum, checksum_len) == 0;
 389         }
 390
 391         if (size_only)
 392                 return 1;
 393
 394         if (ignore_times)
 395                 return 0;
 396
 397         return cmp_time(st->st_mtime, file->modtime) == 0;
 398 }
 399
 400
 401 /*
 402  * set (initialize) the size entries in the per-file sum_struct
 403  * calculating dynamic block and checksum sizes.
 404  *
 405  * This is only called from generate_and_send_sums() but is a separate
 406  * function to encapsulate the logic.
 407  *
 408  * The block size is a rounded square root of file length.
 409  *
 410  * The checksum size is determined according to:
 411  *     blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
 412  * provided by Donovan Baarda which gives a probability of rsync
 413  * algorithm corrupting data and falling back using the whole md4
 414  * checksums.
 415  *
 416  * This might be made one of several selectable heuristics.
 417  */
 418 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
 419 {
 420         int32 blength;
 421         int s2length;
 422
 423         if (block_size)
 424                 blength = block_size;
 425         else if (len <= BLOCK_SIZE * BLOCK_SIZE)
 426                 blength = BLOCK_SIZE;
 427         else {
 428                 int32 c;
 429                 int64 l;
 430                 int cnt;
 431                 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
 432                 if (cnt >= 31 || c >= MAX_BLOCK_SIZE)
 433                         blength = MAX_BLOCK_SIZE;
 434                 else {
 435                     blength = 0;
 436                     do {
 437                             blength |= c;
 438                             if (len < (int64)blength * blength)
 439                                     blength &= ~c;
 440                             c >>= 1;
 441                     } while (c >= 8);   /* round to multiple of 8 */
 442                     blength = MAX(blength, BLOCK_SIZE);
 443                 }
 444         }
 445
 446         if (protocol_version < 27) {
 447                 s2length = csum_length;
 448         } else if (csum_length == SUM_LENGTH) {
 449                 s2length = SUM_LENGTH;
 450         } else {
 451                 int32 c;
 452                 int64 l;
 453                 int b = BLOCKSUM_BIAS;
 454                 for (l = len; l >>= 1; b += 2) {}
 455                 for (c = blength; c >>= 1 && b; b--) {}
 456                 /* add a bit, subtract rollsum, round up. */
 457                 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
 458                 s2length = MAX(s2length, csum_length);
 459                 s2length = MIN(s2length, SUM_LENGTH);
 460         }
 461
 462         sum->flength    = len;
 463         sum->blength    = blength;
 464         sum->s2length   = s2length;
 465         sum->remainder  = len % blength;
 466         sum->count      = len / blength + (sum->remainder != 0);
 467
 468         if (sum->count && verbose > 2) {
 469                 rprintf(FINFO,
 470                         "count=%.0f rem=%ld blength=%ld s2length=%d flength=%.0f\n",
 471                         (double)sum->count, (long)sum->remainder, (long)sum->blength,
 472                         sum->s2length, (double)sum->flength);
 473         }
 474 }
 475
 476
 477 /*
 478  * Generate and send a stream of signatures/checksums that describe a buffer
 479  *
 480  * Generate approximately one checksum every block_len bytes.
 481  */
 482 static void generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
 483 {
 484         int32 i;
 485         struct map_struct *mapbuf;
 486         struct sum_struct sum;
 487         OFF_T offset = 0;
 488
 489         sum_sizes_sqroot(&sum, len);
 490         write_sum_head(f_out, &sum);
 491
 492         if (append_mode > 0 && f_copy < 0)
 493                 return;
 494
 495         if (len > 0)
 496                 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
 497         else
 498                 mapbuf = NULL;
 499
 500         for (i = 0; i < sum.count; i++) {
 501                 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
 502                 char *map = map_ptr(mapbuf, offset, n1);
 503                 char sum2[SUM_LENGTH];
 504                 uint32 sum1;
 505
 506                 len -= n1;
 507                 offset += n1;
 508
 509                 if (f_copy >= 0) {
 510                         full_write(f_copy, map, n1);
 511                         if (append_mode > 0)
 512                                 continue;
 513                 }
 514
 515                 sum1 = get_checksum1(map, n1);
 516                 get_checksum2(map, n1, sum2);
 517
 518                 if (verbose > 3) {
 519                         rprintf(FINFO,
 520                                 "chunk[%.0f] offset=%.0f len=%ld sum1=%08lx\n",
 521                                 (double)i, (double)offset - n1, (long)n1,
 522                                 (unsigned long)sum1);
 523                 }
 524                 write_int(f_out, sum1);
 525                 write_buf(f_out, sum2, sum.s2length);
 526         }
 527
 528         if (mapbuf)
 529                 unmap_file(mapbuf);
 530 }
 531
 532
 533 /* Try to find a filename in the same dir as "fname" with a similar name. */
 534 static int find_fuzzy(struct file_struct *file, struct file_list *dirlist)
 535 {
 536         int fname_len, fname_suf_len;
 537         const char *fname_suf, *fname = file->basename;
 538         uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
 539         int j, lowest_j = -1;
 540
 541         fname_len = strlen(fname);
 542         fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
 543
 544         for (j = 0; j < dirlist->count; j++) {
 545                 struct file_struct *fp = dirlist->files[j];
 546                 const char *suf, *name;
 547                 int len, suf_len;
 548                 uint32 dist;
 549
 550                 if (!S_ISREG(fp->mode) || !fp->length
 551                     || fp->flags & FLAG_NO_FUZZY)
 552                         continue;
 553
 554                 name = fp->basename;
 555
 556                 if (fp->length == file->length
 557                     && cmp_time(fp->modtime, file->modtime) == 0) {
 558                         if (verbose > 4) {
 559                                 rprintf(FINFO,
 560                                         "fuzzy size/modtime match for %s\n",
 561                                         name);
 562                         }
 563                         return j;
 564                 }
 565
 566                 len = strlen(name);
 567                 suf = find_filename_suffix(name, len, &suf_len);
 568
 569                 dist = fuzzy_distance(name, len, fname, fname_len);
 570                 /* Add some extra weight to how well the suffixes match. */
 571                 dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len)
 572                       * 10;
 573                 if (verbose > 4) {
 574                         rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
 575                                 name, (int)(dist>>16), (int)(dist&0xFFFF));
 576                 }
 577                 if (dist <= lowest_dist) {
 578                         lowest_dist = dist;
 579                         lowest_j = j;
 580                 }
 581         }
 582
 583         return lowest_j;
 584 }
 585
 586 void check_for_finished_hlinks(int itemizing, enum logcode code)
 587 {
 588         struct file_struct *file;
 589         int ndx;
 590
 591         while ((ndx = get_hlink_num()) != -1) {
 592                 if (ndx < 0 || ndx >= the_file_list->count)
 593                         continue;
 594
 595                 file = the_file_list->files[ndx];
 596                 if (!file->link_u.links)
 597                         continue;
 598
 599                 hard_link_cluster(file, ndx, itemizing, code);
 600         }
 601 }
 602
 603 /* This is only called for regular files.  We return -2 if we've finished
 604  * handling the file, -1 if no dest-linking occurred, or a non-negative
 605  * value if we found an alternate basis file. */
 606 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
 607                          char *cmpbuf, STRUCT_STAT *stp, int itemizing,
 608                          int maybe_ATTRS_REPORT, enum logcode code)
 609 {
 610         int save_ignore_times = ignore_times;
 611         int best_match = -1;
 612         int match_level = 0;
 613         int j = 0;
 614
 615         /* We can't let ignore_times affect the unchanged_file() test in
 616          * an alternate-dest dir or we will never find any matches. */
 617         ignore_times = 0;
 618
 619         do {
 620                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 621                 if (link_stat(cmpbuf, stp, 0) < 0 || !S_ISREG(stp->st_mode))
 622                         continue;
 623                 switch (match_level) {
 624                 case 0:
 625                         best_match = j;
 626                         match_level = 1;
 627                         /* FALL THROUGH */
 628                 case 1:
 629                         if (!unchanged_file(cmpbuf, file, stp))
 630                                 continue;
 631                         best_match = j;
 632                         match_level = 2;
 633                         /* FALL THROUGH */
 634                 case 2:
 635                         if (!unchanged_attrs(file, stp))
 636                                 continue;
 637                         if (always_checksum && preserve_times
 638                          && cmp_time(stp->st_mtime, file->modtime))
 639                                 continue;
 640                         best_match = j;
 641                         match_level = 3;
 642                         break;
 643                 }
 644                 break;
 645         } while (basis_dir[++j] != NULL);
 646
 647         ignore_times = save_ignore_times;
 648
 649         if (!match_level)
 650                 return -1;
 651
 652         if (j != best_match) {
 653                 j = best_match;
 654                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 655                 if (link_stat(cmpbuf, stp, 0) < 0)
 656                         match_level = 0;
 657         }
 658
 659         if (match_level == 3 && !copy_dest) {
 660 #ifdef SUPPORT_HARD_LINKS
 661                 if (link_dest) {
 662                         if (hard_link_one(file, ndx, fname, 0, stp,
 663                                           cmpbuf, 1,
 664                                           itemizing && verbose > 1,
 665                                           code) < 0)
 666                                 goto try_a_copy;
 667                         if (preserve_hard_links && file->link_u.links)
 668                                 hard_link_cluster(file, ndx, itemizing, code);
 669                 } else
 670 #endif
 671                 if (itemizing)
 672                         itemize(file, ndx, 0, stp, 0, 0, NULL);
 673                 if (verbose > 1 && maybe_ATTRS_REPORT) {
 674                         rprintf(FCLIENT, "%s is uptodate\n", fname);
 675                 }
 676                 return -2;
 677         }
 678
 679         if (match_level >= 2) {
 680           try_a_copy: /* Copy the file locally. */
 681                 if (copy_file(cmpbuf, fname, file->mode) < 0) {
 682                         if (verbose) {
 683                                 rsyserr(FINFO, errno, "copy_file %s => %s",
 684                                         full_fname(cmpbuf), fname);
 685                         }
 686                         return -1;
 687                 }
 688                 if (itemizing)
 689                         itemize(file, ndx, 0, stp, ITEM_LOCAL_CHANGE, 0, NULL);
 690                 set_file_attrs(fname, file, NULL, 0);
 691                 if (maybe_ATTRS_REPORT
 692                  && ((!itemizing && verbose && match_level == 2)
 693                   || (verbose > 1 && match_level == 3))) {
 694                         code = match_level == 3 ? FCLIENT : FINFO;
 695                         rprintf(code, "%s%s\n", fname,
 696                                 match_level == 3 ? " is uptodate" : "");
 697                 }
 698                 if (preserve_hard_links && file->link_u.links)
 699                         hard_link_cluster(file, ndx, itemizing, code);
 700                 return -2;
 701         }
 702
 703         return FNAMECMP_BASIS_DIR_LOW + j;
 704 }
 705
 706 /* This is only called for non-regular files.  We return -2 if we've finished
 707  * handling the file, or -1 if no dest-linking occurred. */
 708 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
 709                          int itemizing, int maybe_ATTRS_REPORT,
 710                          enum logcode code)
 711 {
 712         char fnamebuf[MAXPATHLEN];
 713         STRUCT_STAT st;
 714         int i = 0;
 715
 716         do {
 717                 pathjoin(fnamebuf, MAXPATHLEN, basis_dir[i], fname);
 718                 if (link_stat(fnamebuf, &st, 0) < 0 || S_ISDIR(st.st_mode)
 719                  || !unchanged_attrs(file, &st))
 720                         continue;
 721                 if (S_ISLNK(file->mode)) {
 722 #ifdef SUPPORT_LINKS
 723                         char lnk[MAXPATHLEN];
 724                         int len;
 725                         if ((len = readlink(fnamebuf, lnk, MAXPATHLEN-1)) <= 0)
 726                                 continue;
 727                         lnk[len] = '\0';
 728                         if (strcmp(lnk, file->u.link) != 0)
 729 #endif
 730                                 continue;
 731                 } else if (IS_SPECIAL(file->mode)) {
 732                         if (!IS_SPECIAL(st.st_mode) || st.st_rdev != file->u.rdev)
 733                                 continue;
 734                 } else if (IS_DEVICE(file->mode)) {
 735                         if (!IS_DEVICE(st.st_mode) || st.st_rdev != file->u.rdev)
 736                                 continue;
 737                 } else {
 738                         rprintf(FERROR,
 739                                 "internal: try_dests_non() called with invalid mode (%o)\n",
 740                                 (int)file->mode);
 741                         exit_cleanup(RERR_UNSUPPORTED);
 742                 }
 743 #ifdef SUPPORT_HARD_LINKS
 744                 if (link_dest
 745 #ifndef CAN_HARDLINK_SYMLINK
 746                  && !S_ISLNK(file->mode)
 747 #endif
 748 #ifndef CAN_HARDLINK_SPECIAL
 749                  && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
 750 #endif
 751                 ) {
 752                         if (do_link(fnamebuf, fname) < 0) {
 753                                 rsyserr(FERROR, errno,
 754                                         "failed to hard-link %s with %s",
 755                                         fnamebuf, fname);
 756                                 break;
 757                         }
 758                         if (preserve_hard_links && file->link_u.links)
 759                                 hard_link_cluster(file, ndx, itemizing, code);
 760                 }
 761 #endif
 762                 if (itemizing && stdout_format_has_i && verbose > 1) {
 763                         int changes = compare_dest ? 0 : ITEM_LOCAL_CHANGE
 764                                     + (link_dest ? ITEM_XNAME_FOLLOWS : 0);
 765                         char *lp = link_dest ? "" : NULL;
 766                         itemize(file, ndx, 0, &st, changes, 0, lp);
 767                 }
 768                 if (verbose > 1 && maybe_ATTRS_REPORT) {
 769                         rprintf(FCLIENT, "%s is uptodate\n", fname);
 770                 }
 771                 return -2;
 772         } while (basis_dir[++i] != NULL);
 773
 774         return -1;
 775 }
 776
 777 static int phase = 0;
 778
 779 /* Acts on the_file_list->file's ndx'th item, whose name is fname.  If a dir,
 780  * make sure it exists, and has the right permissions/timestamp info.  For
 781  * all other non-regular files (symlinks, etc.) we create them here.  For
 782  * regular files that have changed, we try to find a basis file and then
 783  * start sending checksums.
 784  *
 785  * When fname is non-null, it must point to a MAXPATHLEN buffer!
 786  *
 787  * Note that f_out is set to -1 when doing final directory-permission and
 788  * modification-time repair. */
 789 static void recv_generator(char *fname, struct file_struct *file, int ndx,
 790                            int itemizing, int maybe_ATTRS_REPORT,
 791                            enum logcode code, int f_out)
 792 {
 793         static int missing_below = -1, excluded_below = -1;
 794         static char *parent_dirname = "";
 795         static struct file_list *fuzzy_dirlist = NULL;
 796         static int need_fuzzy_dirlist = 0;
 797         struct file_struct *fuzzy_file = NULL;
 798         int fd = -1, f_copy = -1;
 799         STRUCT_STAT st, real_st, partial_st;
 800         struct file_struct *back_file = NULL;
 801         int statret, real_ret, stat_errno;
 802         char *fnamecmp, *partialptr, *backupptr = NULL;
 803         char fnamecmpbuf[MAXPATHLEN];
 804         uchar fnamecmp_type;
 805         int del_opts = DEL_TERSE | (delete_mode ? DEL_FORCE_RECURSE : 0);
 806
 807         if (list_only)
 808                 return;
 809
 810         if (!fname) {
 811                 if (fuzzy_dirlist) {
 812                         flist_free(fuzzy_dirlist);
 813                         fuzzy_dirlist = NULL;
 814                 }
 815                 if (missing_below >= 0) {
 816                         if (dry_run)
 817                                 dry_run--;
 818                         missing_below = -1;
 819                 }
 820                 parent_dirname = "";
 821                 return;
 822         }
 823
 824         if (verbose > 2)
 825                 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
 826
 827         if (server_filter_list.head) {
 828                 if (excluded_below >= 0) {
 829                         if (file->dir.depth > excluded_below)
 830                                 goto skipping;
 831                         excluded_below = -1;
 832                 }
 833                 if (check_filter(&server_filter_list, fname,
 834                                  S_ISDIR(file->mode)) < 0) {
 835                         if (S_ISDIR(file->mode))
 836                                 excluded_below = file->dir.depth;
 837                   skipping:
 838                         if (verbose) {
 839                                 rprintf(FINFO,
 840                                         "skipping server-excluded file \"%s\"\n",
 841                                         fname);
 842                         }
 843                         return;
 844                 }
 845         }
 846
 847         if (missing_below >= 0) {
 848                 if (file->dir.depth <= missing_below) {
 849                         if (dry_run)
 850                                 dry_run--;
 851                         missing_below = -1;
 852                 } else if (!dry_run)
 853                         return;
 854         }
 855         if (dry_run > 1) {
 856                 statret = -1;
 857                 stat_errno = ENOENT;
 858         } else {
 859                 char *dn = file->dirname ? file->dirname : ".";
 860                 if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
 861                         if (relative_paths && !implied_dirs
 862                          && safe_stat(dn, &st) < 0
 863                          && create_directory_path(fname) < 0) {
 864                                 rsyserr(FERROR, errno,
 865                                         "recv_generator: mkdir %s failed",
 866                                         full_fname(dn));
 867                         }
 868                         if (fuzzy_dirlist) {
 869                                 flist_free(fuzzy_dirlist);
 870                                 fuzzy_dirlist = NULL;
 871                         }
 872                         if (fuzzy_basis)
 873                                 need_fuzzy_dirlist = 1;
 874                 }
 875                 parent_dirname = dn;
 876
 877                 if (need_fuzzy_dirlist && S_ISREG(file->mode)) {
 878                         fuzzy_dirlist = get_dirlist(dn, -1, 1);
 879                         need_fuzzy_dirlist = 0;
 880                 }
 881
 882                 statret = link_stat(fname, &st,
 883                                     keep_dirlinks && S_ISDIR(file->mode));
 884                 stat_errno = errno;
 885         }
 886
 887         if (ignore_non_existing && statret == -1 && stat_errno == ENOENT) {
 888                 if (verbose > 1) {
 889                         rprintf(FINFO, "not creating new %s \"%s\"\n",
 890                                 S_ISDIR(file->mode) ? "directory" : "file",
 891                                 fname);
 892                 }
 893                 return;
 894         }
 895
 896         /* If we're not preserving permissions, change the file-list's
 897          * mode based on the local permissions and some heuristics. */
 898         if (!preserve_perms) {
 899                 int exists = statret == 0
 900                           && S_ISDIR(st.st_mode) == S_ISDIR(file->mode);
 901                 file->mode = dest_mode(file->mode, st.st_mode, exists);
 902         }
 903
 904         if (S_ISDIR(file->mode)) {
 905                 /* The file to be received is a directory, so we need
 906                  * to prepare appropriately.  If there is already a
 907                  * file of that name and it is *not* a directory, then
 908                  * we need to delete it.  If it doesn't exist, then
 909                  * (perhaps recursively) create it. */
 910                 if (statret == 0 && !S_ISDIR(st.st_mode)) {
 911                         if (delete_item(fname, st.st_mode, del_opts) < 0)
 912                                 return;
 913                         statret = -1;
 914                 }
 915                 if (dry_run && statret != 0 && missing_below < 0) {
 916                         missing_below = file->dir.depth;
 917                         dry_run++;
 918                 }
 919                 if (itemizing && f_out != -1) {
 920                         itemize(file, ndx, statret, &st,
 921                                 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
 922                 }
 923                 if (statret != 0 && do_mkdir(fname,file->mode) < 0 && errno != EEXIST) {
 924                         if (!relative_paths || errno != ENOENT
 925                             || create_directory_path(fname) < 0
 926                             || (do_mkdir(fname, file->mode) < 0 && errno != EEXIST)) {
 927                                 rsyserr(FERROR, errno,
 928                                         "recv_generator: mkdir %s failed",
 929                                         full_fname(fname));
 930                                 file->flags |= FLAG_MISSING;
 931                                 if (ndx+1 < the_file_list->count
 932                                  && the_file_list->files[ndx+1]->dir.depth > file->dir.depth) {
 933                                         rprintf(FERROR,
 934                                             "*** Skipping everything below this failed directory ***\n");
 935                                         missing_below = file->dir.depth;
 936                                 }
 937                                 return;
 938                         }
 939                 }
 940                 if (set_file_attrs(fname, file, statret ? NULL : &st, 0)
 941                     && verbose && code && f_out != -1)
 942                         rprintf(code, "%s/\n", fname);
 943                 if (delete_during && f_out != -1 && !phase && dry_run < 2
 944                     && (file->flags & FLAG_DEL_HERE))
 945                         delete_in_dir(the_file_list, fname, file, &st);
 946                 return;
 947         }
 948
 949         if (preserve_hard_links && file->link_u.links
 950             && hard_link_check(file, ndx, fname, statret, &st,
 951                                itemizing, code, HL_CHECK_MASTER))
 952                 return;
 953
 954         if (preserve_links && S_ISLNK(file->mode)) {
 955 #ifdef SUPPORT_LINKS
 956                 if (safe_symlinks && unsafe_symlink(file->u.link, fname)) {
 957                         if (verbose) {
 958                                 if (the_file_list->count == 1)
 959                                         fname = f_name(file, NULL);
 960                                 rprintf(FINFO,
 961                                         "ignoring unsafe symlink %s -> \"%s\"\n",
 962                                         full_fname(fname), file->u.link);
 963                         }
 964                         return;
 965                 }
 966                 if (statret == 0) {
 967                         char lnk[MAXPATHLEN];
 968                         int len;
 969
 970                         if (!S_ISDIR(st.st_mode)
 971                             && (len = readlink(fname, lnk, MAXPATHLEN-1)) > 0) {
 972                                 lnk[len] = 0;
 973                                 /* A link already pointing to the
 974                                  * right place -- no further action
 975                                  * required. */
 976                                 if (strcmp(lnk, file->u.link) == 0) {
 977                                         if (itemizing) {
 978                                                 itemize(file, ndx, 0, &st, 0,
 979                                                         0, NULL);
 980                                         }
 981                                         set_file_attrs(fname, file, &st,
 982                                                        maybe_ATTRS_REPORT);
 983                                         if (preserve_hard_links
 984                                             && file->link_u.links) {
 985                                                 hard_link_cluster(file, ndx,
 986                                                                   itemizing,
 987                                                                   code);
 988                                         }
 989                                         if (remove_sender_files == 1)
 990                                                 goto return_with_success;
 991                                         return;
 992                                 }
 993                         }
 994                         /* Not the right symlink (or not a symlink), so
 995                          * delete it. */
 996                         if (delete_item(fname, st.st_mode, del_opts) < 0)
 997                                 return;
 998                         if (!S_ISLNK(st.st_mode))
 999                                 statret = -1;
1000                 } else if (basis_dir[0] != NULL) {
1001                         if (try_dests_non(file, fname, ndx, itemizing,
1002                                           maybe_ATTRS_REPORT, code) == -2) {
1003 #ifndef CAN_HARDLINK_SYMLINK
1004                                 if (link_dest) {
1005                                         /* Resort to --copy-dest behavior. */
1006                                 } else
1007 #endif
1008                                 if (!copy_dest)
1009                                         return;
1010                                 itemizing = code = 0;
1011                         }
1012                 }
1013                 if (preserve_hard_links && file->link_u.links
1014                     && hard_link_check(file, ndx, fname, -1, &st,
1015                                        itemizing, code, HL_SKIP))
1016                         return;
1017                 if (do_symlink(file->u.link,fname) != 0) {
1018                         rsyserr(FERROR, errno, "symlink %s -> \"%s\" failed",
1019                                 full_fname(fname), file->u.link);
1020                 } else {
1021                         set_file_attrs(fname, file, NULL, 0);
1022                         if (itemizing) {
1023                                 itemize(file, ndx, statret, &st,
1024                                         ITEM_LOCAL_CHANGE, 0, NULL);
1025                         }
1026                         if (code && verbose) {
1027                                 rprintf(code, "%s -> %s\n", fname,
1028                                         file->u.link);
1029                         }
1030                         if (preserve_hard_links && file->link_u.links)
1031                                 hard_link_cluster(file, ndx, itemizing, code);
1032                         if (remove_sender_files)
1033                                 goto return_with_success;
1034                 }
1035 #endif
1036                 return;
1037         }
1038
1039         if ((am_root && preserve_devices && IS_DEVICE(file->mode))
1040          || (preserve_specials && IS_SPECIAL(file->mode))) {
1041                 if (statret != 0 && basis_dir[0] != NULL) {
1042                         if (try_dests_non(file, fname, ndx, itemizing,
1043                                           maybe_ATTRS_REPORT, code) == -2) {
1044 #ifndef CAN_HARDLINK_SPECIAL
1045                                 if (link_dest) {
1046                                         /* Resort to --copy-dest behavior. */
1047                                 } else
1048 #endif
1049                                 if (!copy_dest)
1050                                         return;
1051                                 itemizing = code = 0;
1052                         }
1053                 }
1054                 if (statret != 0
1055                  || (st.st_mode & ~CHMOD_BITS) != (file->mode & ~CHMOD_BITS)
1056                  || st.st_rdev != file->u.rdev) {
1057                         if (statret == 0
1058                          && delete_item(fname, st.st_mode, del_opts) < 0)
1059                                 return;
1060                         if (preserve_hard_links && file->link_u.links
1061                             && hard_link_check(file, ndx, fname, -1, &st,
1062                                                itemizing, code, HL_SKIP))
1063                                 return;
1064                         if ((IS_DEVICE(file->mode) && !IS_DEVICE(st.st_mode))
1065                          || (IS_SPECIAL(file->mode) && !IS_SPECIAL(st.st_mode)))
1066                                 statret = -1;
1067                         if (verbose > 2) {
1068                                 rprintf(FINFO,"mknod(%s,0%o,0x%x)\n",
1069                                         fname,
1070                                         (int)file->mode, (int)file->u.rdev);
1071                         }
1072                         if (do_mknod(fname,file->mode,file->u.rdev) < 0) {
1073                                 rsyserr(FERROR, errno, "mknod %s failed",
1074                                         full_fname(fname));
1075                         } else {
1076                                 set_file_attrs(fname, file, NULL, 0);
1077                                 if (itemizing) {
1078                                         itemize(file, ndx, statret, &st,
1079                                                 ITEM_LOCAL_CHANGE, 0, NULL);
1080                                 }
1081                                 if (code && verbose)
1082                                         rprintf(code, "%s\n", fname);
1083                                 if (preserve_hard_links && file->link_u.links) {
1084                                         hard_link_cluster(file, ndx,
1085                                                           itemizing, code);
1086                                 }
1087                                 if (remove_sender_files == 1)
1088                                         goto return_with_success;
1089                         }
1090                 } else {
1091                         if (itemizing)
1092                                 itemize(file, ndx, statret, &st, 0, 0, NULL);
1093                         set_file_attrs(fname, file, &st, maybe_ATTRS_REPORT);
1094                         if (preserve_hard_links && file->link_u.links)
1095                                 hard_link_cluster(file, ndx, itemizing, code);
1096                         if (remove_sender_files == 1)
1097                                 goto return_with_success;
1098                 }
1099                 return;
1100         }
1101
1102         if (!S_ISREG(file->mode)) {
1103                 if (the_file_list->count == 1)
1104                         fname = f_name(file, NULL);
1105                 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1106                 return;
1107         }
1108
1109         if (max_size && file->length > max_size) {
1110                 if (verbose > 1) {
1111                         if (the_file_list->count == 1)
1112                                 fname = f_name(file, NULL);
1113                         rprintf(FINFO, "%s is over max-size\n", fname);
1114                 }
1115                 return;
1116         }
1117         if (min_size && file->length < min_size) {
1118                 if (verbose > 1) {
1119                         if (the_file_list->count == 1)
1120                                 fname = f_name(file, NULL);
1121                         rprintf(FINFO, "%s is under min-size\n", fname);
1122                 }
1123                 return;
1124         }
1125
1126         if (ignore_existing && statret == 0) {
1127                 if (verbose > 1)
1128                         rprintf(FINFO, "%s exists\n", fname);
1129                 return;
1130         }
1131
1132         if (update_only && statret == 0
1133             && cmp_time(st.st_mtime, file->modtime) > 0) {
1134                 if (verbose > 1)
1135                         rprintf(FINFO, "%s is newer\n", fname);
1136                 return;
1137         }
1138
1139         fnamecmp = fname;
1140         fnamecmp_type = FNAMECMP_FNAME;
1141
1142         if (statret == 0 && !S_ISREG(st.st_mode)) {
1143                 if (delete_item(fname, st.st_mode, del_opts) != 0)
1144                         return;
1145                 statret = -1;
1146                 stat_errno = ENOENT;
1147         }
1148
1149         if (statret != 0 && basis_dir[0] != NULL) {
1150                 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &st,
1151                                       itemizing, maybe_ATTRS_REPORT, code);
1152                 if (j == -2) {
1153                         if (remove_sender_files == 1)
1154                                 goto return_with_success;
1155                         return;
1156                 }
1157                 if (j != -1) {
1158                         fnamecmp = fnamecmpbuf;
1159                         fnamecmp_type = j;
1160                         statret = 0;
1161                 }
1162         }
1163
1164         real_ret = statret;
1165         real_st = st;
1166
1167         if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1168             && link_stat(partialptr, &partial_st, 0) == 0
1169             && S_ISREG(partial_st.st_mode)) {
1170                 if (statret != 0)
1171                         goto prepare_to_open;
1172         } else
1173                 partialptr = NULL;
1174
1175         if (statret != 0 && fuzzy_dirlist && dry_run <= 1) {
1176                 int j = find_fuzzy(file, fuzzy_dirlist);
1177                 if (j >= 0) {
1178                         fuzzy_file = fuzzy_dirlist->files[j];
1179                         f_name(fuzzy_file, fnamecmpbuf);
1180                         if (verbose > 2) {
1181                                 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1182                                         fname, fnamecmpbuf);
1183                         }
1184                         st.st_size = fuzzy_file->length;
1185                         statret = 0;
1186                         fnamecmp = fnamecmpbuf;
1187                         fnamecmp_type = FNAMECMP_FUZZY;
1188                 }
1189         }
1190
1191         if (statret != 0) {
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                 if (stat_errno == ENOENT)
1197                         goto notify_others;
1198                 rsyserr(FERROR, stat_errno, "recv_generator: failed to stat %s",
1199                         full_fname(fname));
1200                 return;
1201         }
1202
1203         if (append_mode && st.st_size > file->length)
1204                 return;
1205
1206         if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1207                 ;
1208         else if (fnamecmp_type == FNAMECMP_FUZZY)
1209                 ;
1210         else if (unchanged_file(fnamecmp, file, &st)) {
1211                 if (partialptr) {
1212                         do_unlink(partialptr);
1213                         handle_partial_dir(partialptr, PDIR_DELETE);
1214                 }
1215                 if (itemizing) {
1216                         itemize(file, ndx, real_ret, &real_st,
1217                                 0, 0, NULL);
1218                 }
1219                 set_file_attrs(fname, file, &st, maybe_ATTRS_REPORT);
1220                 if (preserve_hard_links && file->link_u.links)
1221                         hard_link_cluster(file, ndx, itemizing, code);
1222                 if (remove_sender_files != 1)
1223                         return;
1224           return_with_success:
1225                 if (!dry_run) {
1226                         char numbuf[4];
1227                         SIVAL(numbuf, 0, ndx);
1228                         send_msg(MSG_SUCCESS, numbuf, 4);
1229                 }
1230                 return;
1231         }
1232
1233   prepare_to_open:
1234         if (partialptr) {
1235                 st = partial_st;
1236                 fnamecmp = partialptr;
1237                 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1238                 statret = 0;
1239         }
1240
1241         if (!do_xfers || read_batch || whole_file)
1242                 goto notify_others;
1243
1244         if (fuzzy_dirlist) {
1245                 int j = flist_find(fuzzy_dirlist, file);
1246                 if (j >= 0) /* don't use changing file as future fuzzy basis */
1247                         fuzzy_dirlist->files[j]->flags |= FLAG_NO_FUZZY;
1248         }
1249
1250         /* open the file */
1251         fd = do_open(fnamecmp, O_RDONLY, 0);
1252
1253         if (fd == -1) {
1254                 rsyserr(FERROR, errno, "failed to open %s, continuing",
1255                         full_fname(fnamecmp));
1256           pretend_missing:
1257                 /* pretend the file didn't exist */
1258                 if (preserve_hard_links && file->link_u.links
1259                     && hard_link_check(file, ndx, fname, statret, &st,
1260                                        itemizing, code, HL_SKIP))
1261                         return;
1262                 statret = real_ret = -1;
1263                 goto notify_others;
1264         }
1265
1266         if (inplace && make_backups && fnamecmp_type == FNAMECMP_FNAME) {
1267                 if (!(backupptr = get_backup_name(fname))) {
1268                         close(fd);
1269                         return;
1270                 }
1271                 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1272                         close(fd);
1273                         goto pretend_missing;
1274                 }
1275                 if (robust_unlink(backupptr) && errno != ENOENT) {
1276                         rsyserr(FERROR, errno, "unlink %s",
1277                                 full_fname(backupptr));
1278                         free(back_file);
1279                         close(fd);
1280                         return;
1281                 }
1282                 if ((f_copy = do_open(backupptr,
1283                     O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1284                         rsyserr(FERROR, errno, "open %s",
1285                                 full_fname(backupptr));
1286                         free(back_file);
1287                         close(fd);
1288                         return;
1289                 }
1290                 fnamecmp_type = FNAMECMP_BACKUP;
1291         }
1292
1293         if (verbose > 3) {
1294                 rprintf(FINFO, "gen mapped %s of size %.0f\n",
1295                         fnamecmp, (double)st.st_size);
1296         }
1297
1298         if (verbose > 2)
1299                 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1300
1301   notify_others:
1302         if (remove_sender_files && !delay_updates && !phase)
1303                 increment_active_files(ndx, itemizing, code);
1304         write_int(f_out, ndx);
1305         if (itemizing) {
1306                 int iflags = ITEM_TRANSFER;
1307                 if (always_checksum)
1308                         iflags |= ITEM_REPORT_CHECKSUM;
1309                 if (fnamecmp_type != FNAMECMP_FNAME)
1310                         iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1311                 if (fnamecmp_type == FNAMECMP_FUZZY)
1312                         iflags |= ITEM_XNAME_FOLLOWS;
1313                 itemize(file, -1, real_ret, &real_st, iflags, fnamecmp_type,
1314                         fuzzy_file ? fuzzy_file->basename : NULL);
1315         }
1316
1317         if (!do_xfers) {
1318                 if (preserve_hard_links && file->link_u.links)
1319                         hard_link_cluster(file, ndx, itemizing, code);
1320                 return;
1321         }
1322         if (read_batch)
1323                 return;
1324
1325         if (statret != 0 || whole_file) {
1326                 write_sum_head(f_out, NULL);
1327                 return;
1328         }
1329
1330         generate_and_send_sums(fd, st.st_size, f_out, f_copy);
1331
1332         if (f_copy >= 0) {
1333                 close(f_copy);
1334                 set_file_attrs(backupptr, back_file, NULL, 0);
1335                 if (verbose > 1) {
1336                         rprintf(FINFO, "backed up %s to %s\n",
1337                                 fname, backupptr);
1338                 }
1339                 free(back_file);
1340         }
1341
1342         close(fd);
1343 }
1344
1345 void generate_files(int f_out, struct file_list *flist, char *local_name)
1346 {
1347         int i;
1348         char fbuf[MAXPATHLEN];
1349         int itemizing, maybe_ATTRS_REPORT;
1350         enum logcode code;
1351         int lull_mod = allowed_lull * 5;
1352         int need_retouch_dir_times = preserve_times && !omit_dir_times;
1353         int need_retouch_dir_perms = 0;
1354         int save_ignore_existing = ignore_existing;
1355         int save_ignore_non_existing = ignore_non_existing;
1356         int save_do_progress = do_progress;
1357         int save_make_backups = make_backups;
1358         int dir_tweaking = !(list_only || local_name || dry_run);
1359
1360         if (protocol_version >= 29) {
1361                 itemizing = 1;
1362                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
1363                 code = logfile_format_has_i ? 0 : FLOG;
1364         } else if (am_daemon) {
1365                 itemizing = logfile_format_has_i && do_xfers;
1366                 maybe_ATTRS_REPORT = ATTRS_REPORT;
1367                 code = itemizing || !do_xfers ? FCLIENT : FINFO;
1368         } else if (!am_server) {
1369                 itemizing = stdout_format_has_i;
1370                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
1371                 code = itemizing ? 0 : FINFO;
1372         } else {
1373                 itemizing = 0;
1374                 maybe_ATTRS_REPORT = ATTRS_REPORT;
1375                 code = FINFO;
1376         }
1377
1378         if (verbose > 2) {
1379                 rprintf(FINFO, "generator starting pid=%ld count=%d\n",
1380                         (long)getpid(), flist->count);
1381         }
1382
1383         if (delete_before && !local_name && flist->count > 0)
1384                 do_delete_pass(flist);
1385         do_progress = 0;
1386
1387         if (append_mode || whole_file < 0)
1388                 whole_file = 0;
1389         if (verbose >= 2) {
1390                 rprintf(FINFO, "delta-transmission %s\n",
1391                         whole_file
1392                         ? "disabled for local transfer or --whole-file"
1393                         : "enabled");
1394         }
1395
1396         /* Since we often fill up the outgoing socket and then just sit around
1397          * waiting for the other 2 processes to do their thing, we don't want
1398          * to exit on a timeout.  If the data stops flowing, the receiver will
1399          * notice that and let us know via the redo pipe (or its closing). */
1400         ignore_timeout = 1;
1401
1402         for (i = 0; i < flist->count; i++) {
1403                 struct file_struct *file = flist->files[i];
1404
1405                 if (!file->basename)
1406                         continue;
1407
1408                 if (local_name)
1409                         strlcpy(fbuf, local_name, sizeof fbuf);
1410                 else
1411                         f_name(file, fbuf);
1412                 recv_generator(fbuf, file, i, itemizing, maybe_ATTRS_REPORT,
1413                                code, f_out);
1414
1415                 /* We need to ensure that any dirs we create have writeable
1416                  * permissions during the time we are putting files within
1417                  * them.  This is then fixed after the transfer is done. */
1418 #ifdef HAVE_CHMOD
1419                 if (!am_root && S_ISDIR(file->mode) && !(file->mode & S_IWUSR)
1420                  && dir_tweaking) {
1421                         mode_t mode = file->mode | S_IWUSR; /* user write */
1422                         char *fname = local_name ? local_name : fbuf;
1423                         if (do_chmod(fname, mode) < 0) {
1424                                 rsyserr(FERROR, errno,
1425                                         "failed to modify permissions on %s",
1426                                         full_fname(fname));
1427                         }
1428                         need_retouch_dir_perms = 1;
1429                 }
1430 #endif
1431
1432                 if (preserve_hard_links)
1433                         check_for_finished_hlinks(itemizing, code);
1434
1435                 if (allowed_lull && !(i % lull_mod))
1436                         maybe_send_keepalive();
1437                 else if (!(i % 200))
1438                         maybe_flush_socket();
1439         }
1440         recv_generator(NULL, NULL, 0, 0, 0, code, -1);
1441         if (delete_during)
1442                 delete_in_dir(NULL, NULL, NULL, NULL);
1443
1444         phase++;
1445         csum_length = SUM_LENGTH;
1446         max_size = min_size = ignore_existing = ignore_non_existing = 0;
1447         update_only = always_checksum = size_only = 0;
1448         ignore_times = 1;
1449         if (append_mode)  /* resend w/o append mode */
1450                 append_mode = -1; /* ... but only longer files */
1451         make_backups = 0; /* avoid a duplicate backup for inplace processing */
1452
1453         if (verbose > 2)
1454                 rprintf(FINFO,"generate_files phase=%d\n",phase);
1455
1456         write_int(f_out, -1);
1457
1458         /* files can cycle through the system more than once
1459          * to catch initial checksum errors */
1460         while ((i = get_redo_num(itemizing, code)) != -1) {
1461                 struct file_struct *file = flist->files[i];
1462                 if (local_name)
1463                         strlcpy(fbuf, local_name, sizeof fbuf);
1464                 else
1465                         f_name(file, fbuf);
1466                 recv_generator(fbuf, file, i, itemizing, maybe_ATTRS_REPORT,
1467                                code, f_out);
1468         }
1469
1470         phase++;
1471         ignore_non_existing = save_ignore_non_existing;
1472         ignore_existing = save_ignore_existing;
1473         make_backups = save_make_backups;
1474
1475         if (verbose > 2)
1476                 rprintf(FINFO,"generate_files phase=%d\n",phase);
1477
1478         write_int(f_out, -1);
1479         /* Reduce round-trip lag-time for a useless delay-updates phase. */
1480         if (protocol_version >= 29 && !delay_updates)
1481                 write_int(f_out, -1);
1482
1483         /* Read MSG_DONE for the redo phase (and any prior messages). */
1484         get_redo_num(itemizing, code);
1485
1486         if (protocol_version >= 29) {
1487                 phase++;
1488                 if (verbose > 2)
1489                         rprintf(FINFO, "generate_files phase=%d\n", phase);
1490                 if (delay_updates)
1491                         write_int(f_out, -1);
1492                 /* Read MSG_DONE for delay-updates phase & prior messages. */
1493                 get_redo_num(itemizing, code);
1494         }
1495
1496         do_progress = save_do_progress;
1497         if (delete_after && !local_name && flist->count > 0)
1498                 do_delete_pass(flist);
1499
1500         if ((need_retouch_dir_perms || need_retouch_dir_times) && dir_tweaking) {
1501                 int j = 0;
1502                 /* Now we need to fix any directory permissions that were
1503                  * modified during the transfer and/or re-set any tweaked
1504                  * modified-time values. */
1505                 for (i = 0; i < flist->count; i++) {
1506                         struct file_struct *file = flist->files[i];
1507
1508                         if (!file->basename || !S_ISDIR(file->mode))
1509                                 continue;
1510                         if (!need_retouch_dir_times && file->mode & S_IWUSR)
1511                                 continue;
1512                         if (file->flags & FLAG_MISSING) {
1513                                 int missing = file->dir.depth;
1514                                 while (++i < flist->count) {
1515                                         file = flist->files[i];
1516                                         if (file->dir.depth <= missing)
1517                                                 break;
1518                                 }
1519                                 i--;
1520                                 continue;
1521                         }
1522                         recv_generator(f_name(file, NULL), file, i, itemizing,
1523                                        maybe_ATTRS_REPORT, code, -1);
1524                         if (allowed_lull && !(++j % lull_mod))
1525                                 maybe_send_keepalive();
1526                         else if (!(j % 200))
1527                                 maybe_flush_socket();
1528                 }
1529         }
1530         recv_generator(NULL, NULL, 0, 0, 0, code, -1);
1531
1532         if (max_delete > 0 && deletion_count > max_delete) {
1533                 rprintf(FINFO,
1534                         "Deletions stopped due to --max-delete limit (%d skipped)\n",
1535                         deletion_count - max_delete);
1536                 io_error |= IOERR_DEL_LIMIT;
1537         }
1538
1539         if (verbose > 2)
1540                 rprintf(FINFO,"generate_files finished\n");
1541 }