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_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_before;
  48 extern int delete_during;
  49 extern int delete_after;
  50 extern int module_id;
  51 extern int ignore_errors;
  52 extern int remove_sent_files;
  53 extern int delay_updates;
  54 extern int update_only;
  55 extern int ignore_existing;
  56 extern int ignore_non_existing;
  57 extern int inplace;
  58 extern int append_mode;
  59 extern int make_backups;
  60 extern int csum_length;
  61 extern int ignore_times;
  62 extern int size_only;
  63 extern OFF_T max_size;
  64 extern OFF_T min_size;
  65 extern int io_error;
  66 extern int allowed_lull;
  67 extern int sock_f_out;
  68 extern int ignore_timeout;
  69 extern int protocol_version;
  70 extern int fuzzy_basis;
  71 extern int always_checksum;
  72 extern int checksum_len;
  73 extern char *partial_dir;
  74 extern char *basis_dir[];
  75 extern int compare_dest;
  76 extern int copy_dest;
  77 extern int link_dest;
  78 extern int whole_file;
  79 extern int list_only;
  80 extern int read_batch;
  81 extern int orig_umask;
  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 static int can_link_symlinks = 1; /* start out optimistic */
  97 static int can_link_devices = 1;
  98
  99 /* For calling delete_file() */
 100 #define DEL_FORCE_RECURSE       (1<<1) /* recurse even w/o --force */
 101 #define DEL_TERSE               (1<<3)
 102
 103
 104 static int is_backup_file(char *fn)
 105 {
 106         int k = strlen(fn) - backup_suffix_len;
 107         return k > 0 && strcmp(fn+k, backup_suffix) == 0;
 108 }
 109
 110
 111 /* Delete a file or directory.  If DEL_FORCE_RECURSE is set in the flags, or if
 112  * force_delete is set, this will delete recursively.
 113  *
 114  * Note that fname must point to a MAXPATHLEN buffer if the mode indicates it's
 115  * a directory! (The buffer is used for recursion, but returned unchanged.)
 116  */
 117 static int delete_item(char *fname, int mode, int flags)
 118 {
 119         struct file_list *dirlist;
 120         int j, dlen, zap_dir, ok;
 121         unsigned remainder;
 122         void *save_filters;
 123         char *p;
 124
 125         if (!S_ISDIR(mode)) {
 126                 if (max_delete && ++deletion_count > max_delete)
 127                         return 0;
 128                 if (make_backups && (backup_dir || !is_backup_file(fname)))
 129                         ok = make_backup(fname);
 130                 else
 131                         ok = robust_unlink(fname) == 0;
 132                 if (ok) {
 133                         if (!(flags & DEL_TERSE))
 134                                 log_delete(fname, mode);
 135                         return 0;
 136                 }
 137                 if (errno == ENOENT) {
 138                         deletion_count--;
 139                         return 0;
 140                 }
 141                 rsyserr(FERROR, errno, "delete_file: unlink %s failed",
 142                         full_fname(fname));
 143                 return -1;
 144         }
 145
 146         zap_dir = flags & DEL_FORCE_RECURSE || (force_delete && recurse);
 147         if ((max_delete && ++deletion_count > max_delete)
 148             || (dry_run && zap_dir)) {
 149                 ok = 0;
 150                 errno = ENOTEMPTY;
 151         } else if (make_backups && !backup_dir && !is_backup_file(fname)
 152             && !(flags & DEL_FORCE_RECURSE))
 153                 ok = make_backup(fname);
 154         else
 155                 ok = do_rmdir(fname) == 0;
 156         if (ok) {
 157                 if (!(flags & DEL_TERSE))
 158                         log_delete(fname, mode);
 159                 return 0;
 160         }
 161         if (errno == ENOENT) {
 162                 deletion_count--;
 163                 return 0;
 164         }
 165         if (!zap_dir) {
 166                 rsyserr(FERROR, errno, "delete_file: rmdir %s failed",
 167                         full_fname(fname));
 168                 return -1;
 169         }
 170         flags |= DEL_FORCE_RECURSE; /* mark subdir dels as not "in the way" */
 171         deletion_count--;
 172
 173         dlen = strlen(fname);
 174         save_filters = push_local_filters(fname, dlen);
 175
 176         dirlist = get_dirlist(fname, dlen, 0);
 177
 178         p = fname + dlen;
 179         if (dlen != 1 || *fname != '/')
 180                 *p++ = '/';
 181         remainder = MAXPATHLEN - (p - fname);
 182
 183         for (j = dirlist->count; j--; ) {
 184                 struct file_struct *fp = dirlist->files[j];
 185
 186                 if (fp->flags & FLAG_MOUNT_POINT)
 187                         continue;
 188
 189                 strlcpy(p, fp->basename, remainder);
 190                 delete_item(fname, fp->mode, flags & ~DEL_TERSE);
 191         }
 192         flist_free(dirlist);
 193
 194         fname[dlen] = '\0';
 195
 196         pop_local_filters(save_filters);
 197
 198         if (max_delete && ++deletion_count > max_delete)
 199                 return 0;
 200
 201         if (do_rmdir(fname) == 0) {
 202                 if (!(flags & DEL_TERSE))
 203                         log_delete(fname, mode);
 204         } else if (errno != ENOTEMPTY && errno != EEXIST && errno != ENOENT) {
 205                 rsyserr(FERROR, errno, "delete_file: rmdir %s failed",
 206                         full_fname(fname));
 207                 return -1;
 208         }
 209
 210         return 0;
 211 }
 212
 213
 214 /* This function is used to implement per-directory deletion, and is used by
 215  * all the --delete-WHEN options.  Note that the fbuf pointer must point to a
 216  * MAXPATHLEN buffer with the name of the directory in it (the functions we
 217  * call will append names onto the end, but the old dir value will be restored
 218  * on exit). */
 219 static void delete_in_dir(struct file_list *flist, char *fbuf,
 220                           struct file_struct *file)
 221 {
 222         static int min_depth = MAXPATHLEN, cur_depth = -1;
 223         static void *filt_array[MAXPATHLEN/2+1];
 224         static int already_warned = 0;
 225         struct file_list *dirlist;
 226         char delbuf[MAXPATHLEN];
 227         STRUCT_STAT st;
 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", safe_fname(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 (link_stat(fbuf, &st, keep_dirlinks) < 0)
 265                 return;
 266
 267         if (one_file_system) {
 268                 if (file->flags & FLAG_TOP_DIR)
 269                         filesystem_dev = st.st_dev;
 270                 else if (filesystem_dev != st.st_dev)
 271                         return;
 272         }
 273
 274         dirlist = get_dirlist(fbuf, dlen, 0);
 275
 276         /* If an item in dirlist is not found in flist, delete it
 277          * from the filesystem. */
 278         for (i = dirlist->count; i--; ) {
 279                 struct file_struct *fp = dirlist->files[i];
 280                 if (!fp->basename || fp->flags & FLAG_MOUNT_POINT)
 281                         continue;
 282                 if (flist_find(flist, fp) < 0) {
 283                         int mode = fp->mode;
 284                         f_name_to(fp, delbuf);
 285                         delete_item(delbuf, mode, DEL_FORCE_RECURSE);
 286                 }
 287         }
 288
 289         flist_free(dirlist);
 290 }
 291
 292 /* This deletes any files on the receiving side that are not present on the
 293  * sending side.  This is used by --delete-before and --delete-after. */
 294 static void do_delete_pass(struct file_list *flist)
 295 {
 296         char fbuf[MAXPATHLEN];
 297         int j;
 298
 299         if (dry_run > 1 /* destination doesn't exist yet */
 300          || list_only)
 301                 return;
 302
 303         for (j = 0; j < flist->count; j++) {
 304                 struct file_struct *file = flist->files[j];
 305
 306                 if (!(file->flags & FLAG_DEL_HERE))
 307                         continue;
 308
 309                 f_name_to(file, fbuf);
 310                 if (verbose > 1 && file->flags & FLAG_TOP_DIR)
 311                         rprintf(FINFO, "deleting in %s\n", safe_fname(fbuf));
 312
 313                 delete_in_dir(flist, fbuf, file);
 314         }
 315         delete_in_dir(NULL, NULL, NULL);
 316
 317         if (do_progress && !am_server)
 318                 rprintf(FINFO, "                    \r");
 319 }
 320
 321 int unchanged_attrs(struct file_struct *file, STRUCT_STAT *st)
 322 {
 323         if (preserve_perms
 324          && (st->st_mode & CHMOD_BITS) != (file->mode & CHMOD_BITS))
 325                 return 0;
 326
 327         if (am_root && preserve_uid && st->st_uid != file->uid)
 328                 return 0;
 329
 330         if (preserve_gid && file->gid != GID_NONE && st->st_gid != file->gid)
 331                 return 0;
 332
 333         return 1;
 334 }
 335
 336 void itemize(struct file_struct *file, int ndx, int statret, STRUCT_STAT *st,
 337              int32 iflags, uchar fnamecmp_type, char *xname)
 338 {
 339         if (statret >= 0) { /* A from-dest-dir statret can == 1! */
 340                 int keep_time = !preserve_times ? 0
 341                     : S_ISDIR(file->mode) ? !omit_dir_times
 342                     : !S_ISLNK(file->mode);
 343
 344                 if (S_ISREG(file->mode) && file->length != st->st_size)
 345                         iflags |= ITEM_REPORT_SIZE;
 346                 if ((iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !keep_time
 347                      && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
 348                     || (keep_time && cmp_modtime(file->modtime, st->st_mtime) != 0))
 349                         iflags |= ITEM_REPORT_TIME;
 350                 if (preserve_perms
 351                  && (file->mode & CHMOD_BITS) != (st->st_mode & CHMOD_BITS))
 352                         iflags |= ITEM_REPORT_PERMS;
 353                 if (preserve_uid && am_root && file->uid != st->st_uid)
 354                         iflags |= ITEM_REPORT_OWNER;
 355                 if (preserve_gid && file->gid != GID_NONE
 356                     && st->st_gid != file->gid)
 357                         iflags |= ITEM_REPORT_GROUP;
 358         } else
 359                 iflags |= ITEM_IS_NEW;
 360
 361         iflags &= 0xffff;
 362         if ((iflags & SIGNIFICANT_ITEM_FLAGS || verbose > 1
 363           || (xname && *xname)) && !read_batch) {
 364                 if (protocol_version >= 29) {
 365                         if (ndx >= 0)
 366                                 write_int(sock_f_out, ndx);
 367                         write_shortint(sock_f_out, iflags);
 368                         if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
 369                                 write_byte(sock_f_out, fnamecmp_type);
 370                         if (iflags & ITEM_XNAME_FOLLOWS)
 371                                 write_vstring(sock_f_out, xname, strlen(xname));
 372                 } else if (ndx >= 0)
 373                         log_item(file, &stats, iflags, xname);
 374         }
 375 }
 376
 377
 378 /* Perform our quick-check heuristic for determining if a file is unchanged. */
 379 int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
 380 {
 381         if (st->st_size != file->length)
 382                 return 0;
 383
 384         /* if always checksum is set then we use the checksum instead
 385            of the file time to determine whether to sync */
 386         if (always_checksum && S_ISREG(st->st_mode)) {
 387                 char sum[MD4_SUM_LENGTH];
 388                 file_checksum(fn, sum, st->st_size);
 389                 return memcmp(sum, file->u.sum, checksum_len) == 0;
 390         }
 391
 392         if (size_only)
 393                 return 1;
 394
 395         if (ignore_times)
 396                 return 0;
 397
 398         return cmp_modtime(st->st_mtime, file->modtime) == 0;
 399 }
 400
 401
 402 /*
 403  * set (initialize) the size entries in the per-file sum_struct
 404  * calculating dynamic block and checksum sizes.
 405  *
 406  * This is only called from generate_and_send_sums() but is a separate
 407  * function to encapsulate the logic.
 408  *
 409  * The block size is a rounded square root of file length.
 410  *
 411  * The checksum size is determined according to:
 412  *     blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
 413  * provided by Donovan Baarda which gives a probability of rsync
 414  * algorithm corrupting data and falling back using the whole md4
 415  * checksums.
 416  *
 417  * This might be made one of several selectable heuristics.
 418  */
 419 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
 420 {
 421         int32 blength;
 422         int s2length;
 423
 424         if (block_size)
 425                 blength = block_size;
 426         else if (len <= BLOCK_SIZE * BLOCK_SIZE)
 427                 blength = BLOCK_SIZE;
 428         else {
 429                 int32 c;
 430                 int64 l;
 431                 int cnt;
 432                 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
 433                 if (cnt >= 31 || c >= MAX_BLOCK_SIZE)
 434                         blength = MAX_BLOCK_SIZE;
 435                 else {
 436                     blength = 0;
 437                     do {
 438                             blength |= c;
 439                             if (len < (int64)blength * blength)
 440                                     blength &= ~c;
 441                             c >>= 1;
 442                     } while (c >= 8);   /* round to multiple of 8 */
 443                     blength = MAX(blength, BLOCK_SIZE);
 444                 }
 445         }
 446
 447         if (protocol_version < 27) {
 448                 s2length = csum_length;
 449         } else if (csum_length == SUM_LENGTH) {
 450                 s2length = SUM_LENGTH;
 451         } else {
 452                 int32 c;
 453                 int64 l;
 454                 int b = BLOCKSUM_BIAS;
 455                 for (l = len; l >>= 1; b += 2) {}
 456                 for (c = blength; c >>= 1 && b; b--) {}
 457                 /* add a bit, subtract rollsum, round up. */
 458                 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
 459                 s2length = MAX(s2length, csum_length);
 460                 s2length = MIN(s2length, SUM_LENGTH);
 461         }
 462
 463         sum->flength    = len;
 464         sum->blength    = blength;
 465         sum->s2length   = s2length;
 466         sum->remainder  = len % blength;
 467         sum->count      = len / blength + (sum->remainder != 0);
 468
 469         if (sum->count && verbose > 2) {
 470                 rprintf(FINFO,
 471                         "count=%.0f rem=%ld blength=%ld s2length=%d flength=%.0f\n",
 472                         (double)sum->count, (long)sum->remainder, (long)sum->blength,
 473                         sum->s2length, (double)sum->flength);
 474         }
 475 }
 476
 477
 478 /*
 479  * Generate and send a stream of signatures/checksums that describe a buffer
 480  *
 481  * Generate approximately one checksum every block_len bytes.
 482  */
 483 static void generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
 484 {
 485         int32 i;
 486         struct map_struct *mapbuf;
 487         struct sum_struct sum;
 488         OFF_T offset = 0;
 489
 490         sum_sizes_sqroot(&sum, len);
 491         write_sum_head(f_out, &sum);
 492
 493         if (append_mode > 0 && f_copy < 0)
 494                 return;
 495
 496         if (len > 0)
 497                 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
 498         else
 499                 mapbuf = NULL;
 500
 501         for (i = 0; i < sum.count; i++) {
 502                 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
 503                 char *map = map_ptr(mapbuf, offset, n1);
 504                 char sum2[SUM_LENGTH];
 505                 uint32 sum1;
 506
 507                 len -= n1;
 508                 offset += n1;
 509
 510                 if (f_copy >= 0) {
 511                         full_write(f_copy, map, n1);
 512                         if (append_mode > 0)
 513                                 continue;
 514                 }
 515
 516                 sum1 = get_checksum1(map, n1);
 517                 get_checksum2(map, n1, sum2);
 518
 519                 if (verbose > 3) {
 520                         rprintf(FINFO,
 521                                 "chunk[%.0f] offset=%.0f len=%ld sum1=%08lx\n",
 522                                 (double)i, (double)offset - n1, (long)n1,
 523                                 (unsigned long)sum1);
 524                 }
 525                 write_int(f_out, sum1);
 526                 write_buf(f_out, sum2, sum.s2length);
 527         }
 528
 529         if (mapbuf)
 530                 unmap_file(mapbuf);
 531 }
 532
 533
 534 /* Try to find a filename in the same dir as "fname" with a similar name. */
 535 static int find_fuzzy(struct file_struct *file, struct file_list *dirlist)
 536 {
 537         int fname_len, fname_suf_len;
 538         const char *fname_suf, *fname = file->basename;
 539         uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
 540         int j, lowest_j = -1;
 541
 542         fname_len = strlen(fname);
 543         fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
 544
 545         for (j = 0; j < dirlist->count; j++) {
 546                 struct file_struct *fp = dirlist->files[j];
 547                 const char *suf, *name;
 548                 int len, suf_len;
 549                 uint32 dist;
 550
 551                 if (!S_ISREG(fp->mode) || !fp->length
 552                     || fp->flags & FLAG_NO_FUZZY)
 553                         continue;
 554
 555                 name = fp->basename;
 556
 557                 if (fp->length == file->length
 558                     && cmp_modtime(fp->modtime, file->modtime) == 0) {
 559                         if (verbose > 4) {
 560                                 rprintf(FINFO,
 561                                         "fuzzy size/modtime match for %s\n",
 562                                         name);
 563                         }
 564                         return j;
 565                 }
 566
 567                 len = strlen(name);
 568                 suf = find_filename_suffix(name, len, &suf_len);
 569
 570                 dist = fuzzy_distance(name, len, fname, fname_len);
 571                 /* Add some extra weight to how well the suffixes match. */
 572                 dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len)
 573                       * 10;
 574                 if (verbose > 4) {
 575                         rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
 576                                 name, (int)(dist>>16), (int)(dist&0xFFFF));
 577                 }
 578                 if (dist <= lowest_dist) {
 579                         lowest_dist = dist;
 580                         lowest_j = j;
 581                 }
 582         }
 583
 584         return lowest_j;
 585 }
 586
 587 void check_for_finished_hlinks(int itemizing, enum logcode code)
 588 {
 589         struct file_struct *file;
 590         int ndx;
 591
 592         while ((ndx = get_hlink_num()) != -1) {
 593                 if (ndx < 0 || ndx >= the_file_list->count)
 594                         continue;
 595
 596                 file = the_file_list->files[ndx];
 597                 if (!file->link_u.links)
 598                         continue;
 599
 600                 hard_link_cluster(file, ndx, itemizing, code);
 601         }
 602 }
 603
 604 /* This is only called for regular files.  We return -2 if we've finished
 605  * handling the file, -1 if no dest-linking occurred, or a non-negative
 606  * value if we found an alternate basis file. */
 607 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
 608                          char *cmpbuf, STRUCT_STAT *stp, int itemizing,
 609                          int maybe_PERMS_REPORT, enum logcode code)
 610 {
 611         int best_match = -1;
 612         int match_level = 0;
 613         int j = 0;
 614
 615         do {
 616                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 617                 if (link_stat(cmpbuf, stp, 0) < 0 || !S_ISREG(stp->st_mode))
 618                         continue;
 619                 switch (match_level) {
 620                 case 0:
 621                         best_match = j;
 622                         match_level = 1;
 623                         /* FALL THROUGH */
 624                 case 1:
 625                         if (!unchanged_file(cmpbuf, file, stp))
 626                                 continue;
 627                         best_match = j;
 628                         match_level = 2;
 629                         /* FALL THROUGH */
 630                 case 2:
 631                         if (!unchanged_attrs(file, stp))
 632                                 continue;
 633                         if ((always_checksum || ignore_times)
 634                          && cmp_modtime(stp->st_mtime, file->modtime))
 635                                 continue;
 636                         best_match = j;
 637                         match_level = 3;
 638                         break;
 639                 }
 640                 break;
 641         } while (basis_dir[++j] != NULL);
 642
 643         if (!match_level)
 644                 return -1;
 645
 646         if (j != best_match) {
 647                 j = best_match;
 648                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 649                 if (link_stat(cmpbuf, stp, 0) < 0)
 650                         match_level = 0;
 651         }
 652
 653 #ifdef HAVE_LINK
 654         if (match_level == 3 && !copy_dest) {
 655                 if (link_dest) {
 656                         if (hard_link_one(file, ndx, fname, 0, stp,
 657                                           cmpbuf, 1,
 658                                           itemizing && verbose > 1,
 659                                           code) < 0)
 660                                 goto try_a_copy;
 661                         if (preserve_hard_links && file->link_u.links)
 662                                 hard_link_cluster(file, ndx, itemizing, code);
 663                 } else if (itemizing)
 664                         itemize(file, ndx, 0, stp, 0, 0, NULL);
 665                 if (verbose > 1 && maybe_PERMS_REPORT) {
 666                         code = daemon_log_format_has_i || dry_run
 667                              ? FCLIENT : FINFO;
 668                         rprintf(code, "%s is uptodate\n", safe_fname(fname));
 669                 }
 670                 return -2;
 671         }
 672 #endif
 673
 674         if (match_level >= 2) {
 675           try_a_copy: /* Copy the file locally. */
 676                 if (copy_file(cmpbuf, fname, file->mode) < 0) {
 677                         if (verbose) {
 678                                 rsyserr(FINFO, errno, "copy_file %s => %s",
 679                                         full_fname(cmpbuf), safe_fname(fname));
 680                         }
 681                         return -1;
 682                 }
 683                 if (itemizing)
 684                         itemize(file, ndx, 0, stp, ITEM_LOCAL_CHANGE, 0, NULL);
 685                 set_perms(fname, file, NULL, 0);
 686                 if (maybe_PERMS_REPORT
 687                  && ((!itemizing && verbose && match_level == 2)
 688                   || (verbose > 1 && match_level == 3))) {
 689                         code = daemon_log_format_has_i || dry_run
 690                              ? FCLIENT : FINFO;
 691                         rprintf(code, "%s%s\n", safe_fname(fname),
 692                                 match_level == 3 ? " is uptodate" : "");
 693                 }
 694                 if (preserve_hard_links && file->link_u.links)
 695                         hard_link_cluster(file, ndx, itemizing, code);
 696                 return -2;
 697         }
 698
 699         return FNAMECMP_BASIS_DIR_LOW + j;
 700 }
 701
 702 /* This is only called for non-regular files.  We return -2 if we've finished
 703  * handling the file, or -1 if no dest-linking occurred. */
 704 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
 705                          int itemizing, int *possible_ptr,
 706                          int maybe_PERMS_REPORT, enum logcode code)
 707 {
 708         char fnamebuf[MAXPATHLEN], lnk[MAXPATHLEN];
 709         STRUCT_STAT st;
 710         int len, i = 0;
 711
 712         do {
 713                 pathjoin(fnamebuf, MAXPATHLEN, basis_dir[i], fname);
 714                 if (link_stat(fnamebuf, &st, 0) < 0 || S_ISDIR(st.st_mode)
 715                  || !unchanged_attrs(file, &st))
 716                         continue;
 717                 if (S_ISLNK(file->mode)) {
 718                         if ((len = readlink(fnamebuf, lnk, MAXPATHLEN-1)) <= 0)
 719                                 continue;
 720                         lnk[len] = '\0';
 721                         if (strcmp(lnk, file->u.link) != 0)
 722                                 continue;
 723                 } else {
 724                         if (!IS_DEVICE(st.st_mode) || st.st_rdev != file->u.rdev)
 725                                 continue;
 726                 }
 727                 if (link_dest) {
 728                         if (do_link(fnamebuf, fname) < 0) {
 729                                 /* TODO improve this to be based on errno? */
 730                                 *possible_ptr = 0;
 731                                 break;
 732                         }
 733                         if (preserve_hard_links && file->link_u.links)
 734                                 hard_link_cluster(file, ndx, itemizing, code);
 735                 }
 736                 if (itemizing && log_format_has_i && verbose > 1) {
 737                         int changes = compare_dest ? 0 : ITEM_LOCAL_CHANGE
 738                                     + (link_dest ? ITEM_XNAME_FOLLOWS : 0);
 739                         char *lp = link_dest ? "" : NULL;
 740                         itemize(file, ndx, 0, &st, changes, 0, lp);
 741                 }
 742                 if (verbose > 1 && maybe_PERMS_REPORT) {
 743                         code = daemon_log_format_has_i || dry_run
 744                              ? FCLIENT : FINFO;
 745                         rprintf(code, "%s is uptodate\n", safe_fname(fname));
 746                 }
 747                 return -2;
 748         } while (basis_dir[++i] != NULL);
 749
 750         return -1;
 751 }
 752
 753 static int phase = 0;
 754
 755 /* Acts on the_file_list->file's ndx'th item, whose name is fname.  If a dir,
 756  * make sure it exists, and has the right permissions/timestamp info.  For
 757  * all other non-regular files (symlinks, etc.) we create them here.  For
 758  * regular files that have changed, we try to find a basis file and then
 759  * start sending checksums.
 760  *
 761  * When fname is non-null, it must point to a MAXPATHLEN buffer!
 762  *
 763  * Note that f_out is set to -1 when doing final directory-permission and
 764  * modification-time repair. */
 765 static void recv_generator(char *fname, struct file_struct *file, int ndx,
 766                            int itemizing, int maybe_PERMS_REPORT,
 767                            enum logcode code, int f_out)
 768 {
 769         static int missing_below = -1, excluded_below = -1;
 770         static char *fuzzy_dirname = "";
 771         static struct file_list *fuzzy_dirlist = NULL;
 772         struct file_struct *fuzzy_file = NULL;
 773         int fd = -1, f_copy = -1;
 774         STRUCT_STAT st, real_st, partial_st;
 775         struct file_struct *back_file = NULL;
 776         int statret, real_ret, stat_errno;
 777         char *fnamecmp, *partialptr, *backupptr = NULL;
 778         char fnamecmpbuf[MAXPATHLEN];
 779         uchar fnamecmp_type;
 780
 781         if (list_only)
 782                 return;
 783
 784         if (!fname) {
 785                 if (fuzzy_dirlist) {
 786                         flist_free(fuzzy_dirlist);
 787                         fuzzy_dirlist = NULL;
 788                         fuzzy_dirname = "";
 789                 }
 790                 if (missing_below >= 0) {
 791                         dry_run--;
 792                         missing_below = -1;
 793                 }
 794                 return;
 795         }
 796
 797         if (verbose > 2) {
 798                 rprintf(FINFO, "recv_generator(%s,%d)\n",
 799                         safe_fname(fname), ndx);
 800         }
 801
 802         if (server_filter_list.head) {
 803                 if (excluded_below >= 0) {
 804                         if (file->dir.depth > excluded_below)
 805                                 goto skipping;
 806                         excluded_below = -1;
 807                 }
 808                 if (check_filter(&server_filter_list, fname,
 809                                  S_ISDIR(file->mode)) < 0) {
 810                         if (S_ISDIR(file->mode))
 811                                 excluded_below = file->dir.depth;
 812                   skipping:
 813                         if (verbose) {
 814                                 rprintf(FINFO,
 815                                         "skipping server-excluded file \"%s\"\n",
 816                                         safe_fname(fname));
 817                         }
 818                         return;
 819                 }
 820         }
 821
 822         if (missing_below >= 0 && file->dir.depth <= missing_below) {
 823                 dry_run--;
 824                 missing_below = -1;
 825         }
 826         if (dry_run > 1) {
 827                 statret = -1;
 828                 stat_errno = ENOENT;
 829         } else {
 830                 if (fuzzy_basis && S_ISREG(file->mode)) {
 831                         char *dn = file->dirname ? file->dirname : ".";
 832                         if (fuzzy_dirname != dn
 833                             && strcmp(fuzzy_dirname, dn) != 0) {
 834                                 if (fuzzy_dirlist)
 835                                         flist_free(fuzzy_dirlist);
 836                                 fuzzy_dirlist = get_dirlist(dn, -1, 1);
 837                         }
 838                         fuzzy_dirname = dn;
 839                 }
 840
 841                 statret = link_stat(fname, &st,
 842                                     keep_dirlinks && S_ISDIR(file->mode));
 843                 stat_errno = errno;
 844         }
 845
 846         if (ignore_non_existing && statret == -1 && stat_errno == ENOENT) {
 847                 if (verbose > 1) {
 848                         rprintf(FINFO, "not creating new %s \"%s\"\n",
 849                                 S_ISDIR(file->mode) ? "directory" : "file",
 850                                 safe_fname(fname));
 851                 }
 852                 return;
 853         }
 854
 855         if (statret == 0 && !preserve_perms
 856             && S_ISDIR(st.st_mode) == S_ISDIR(file->mode)) {
 857                 /* if the file exists already and we aren't perserving
 858                  * permissions then act as though the remote end sent
 859                  * us the file permissions we already have */
 860                 file->mode = (file->mode & ~CHMOD_BITS)
 861                            | (st.st_mode & CHMOD_BITS);
 862         }
 863
 864         if (S_ISDIR(file->mode)) {
 865                 /* The file to be received is a directory, so we need
 866                  * to prepare appropriately.  If there is already a
 867                  * file of that name and it is *not* a directory, then
 868                  * we need to delete it.  If it doesn't exist, then
 869                  * (perhaps recursively) create it. */
 870                 if (statret == 0 && !S_ISDIR(st.st_mode)) {
 871                         if (delete_item(fname, st.st_mode, DEL_TERSE) < 0)
 872                                 return;
 873                         statret = -1;
 874                 }
 875                 if (dry_run && statret != 0 && missing_below < 0) {
 876                         missing_below = file->dir.depth;
 877                         dry_run++;
 878                 }
 879                 if (itemizing && f_out != -1) {
 880                         itemize(file, ndx, statret, &st,
 881                                 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
 882                 }
 883                 if (statret != 0 && do_mkdir(fname,file->mode) < 0 && errno != EEXIST) {
 884                         if (!relative_paths || errno != ENOENT
 885                             || create_directory_path(fname, orig_umask) < 0
 886                             || (do_mkdir(fname, file->mode) < 0 && errno != EEXIST)) {
 887                                 rsyserr(FERROR, errno,
 888                                         "recv_generator: mkdir %s failed",
 889                                         full_fname(fname));
 890                         }
 891                 }
 892                 if (set_perms(fname, file, statret ? NULL : &st, 0)
 893                     && verbose && code && f_out != -1)
 894                         rprintf(code, "%s/\n", safe_fname(fname));
 895                 if (delete_during && f_out != -1 && !phase && dry_run < 2
 896                     && (file->flags & FLAG_DEL_HERE))
 897                         delete_in_dir(the_file_list, fname, file);
 898                 return;
 899         }
 900
 901         if (preserve_hard_links && file->link_u.links
 902             && hard_link_check(file, ndx, fname, statret, &st,
 903                                itemizing, code, HL_CHECK_MASTER))
 904                 return;
 905
 906         if (preserve_links && S_ISLNK(file->mode)) {
 907 #ifdef SUPPORT_LINKS
 908                 if (safe_symlinks && unsafe_symlink(file->u.link, fname)) {
 909                         if (verbose) {
 910                                 if (the_file_list->count == 1)
 911                                         fname = f_name(file);
 912                                 rprintf(FINFO,
 913                                         "ignoring unsafe symlink %s -> \"%s\"\n",
 914                                         full_fname(fname),
 915                                         safe_fname(file->u.link));
 916                         }
 917                         return;
 918                 }
 919                 if (statret == 0) {
 920                         char lnk[MAXPATHLEN];
 921                         int len;
 922
 923                         if (!S_ISDIR(st.st_mode)
 924                             && (len = readlink(fname, lnk, MAXPATHLEN-1)) > 0) {
 925                                 lnk[len] = 0;
 926                                 /* A link already pointing to the
 927                                  * right place -- no further action
 928                                  * required. */
 929                                 if (strcmp(lnk, file->u.link) == 0) {
 930                                         if (itemizing) {
 931                                                 itemize(file, ndx, 0, &st, 0,
 932                                                         0, NULL);
 933                                         }
 934                                         set_perms(fname, file, &st,
 935                                                   maybe_PERMS_REPORT);
 936                                         if (preserve_hard_links
 937                                             && file->link_u.links) {
 938                                                 hard_link_cluster(file, ndx,
 939                                                                   itemizing,
 940                                                                   code);
 941                                         }
 942                                         return;
 943                                 }
 944                         }
 945                         /* Not the right symlink (or not a symlink), so
 946                          * delete it. */
 947                         if (delete_item(fname, st.st_mode, DEL_TERSE) < 0)
 948                                 return;
 949                         if (!S_ISLNK(st.st_mode))
 950                                 statret = -1;
 951                 } else if (basis_dir[0] != NULL && can_link_symlinks) {
 952                         if (try_dests_non(file, fname, ndx, itemizing,
 953                                           &can_link_symlinks,
 954                                           maybe_PERMS_REPORT, code) == -2) {
 955                                 if (!copy_dest)
 956                                         return;
 957                                 itemizing = code = 0;
 958                         }
 959                 }
 960                 if (preserve_hard_links && file->link_u.links
 961                     && hard_link_check(file, ndx, fname, -1, &st,
 962                                        itemizing, code, HL_SKIP))
 963                         return;
 964                 if (do_symlink(file->u.link,fname) != 0) {
 965                         rsyserr(FERROR, errno, "symlink %s -> \"%s\" failed",
 966                                 full_fname(fname), safe_fname(file->u.link));
 967                 } else {
 968                         set_perms(fname,file,NULL,0);
 969                         if (itemizing) {
 970                                 itemize(file, ndx, statret, &st,
 971                                         ITEM_LOCAL_CHANGE, 0, NULL);
 972                         }
 973                         if (code && verbose) {
 974                                 rprintf(code, "%s -> %s\n", safe_fname(fname),
 975                                         safe_fname(file->u.link));
 976                         }
 977                         if (remove_sent_files && !dry_run) {
 978                                 char numbuf[4];
 979                                 SIVAL(numbuf, 0, ndx);
 980                                 send_msg(MSG_SUCCESS, numbuf, 4);
 981                         }
 982                         if (preserve_hard_links && file->link_u.links)
 983                                 hard_link_cluster(file, ndx, itemizing, code);
 984                 }
 985 #endif
 986                 return;
 987         }
 988
 989         if (am_root && preserve_devices && IS_DEVICE(file->mode)) {
 990                 if (statret != 0
 991                  && (basis_dir[0] != NULL && can_link_devices)) {
 992                         if (try_dests_non(file, fname, ndx, itemizing,
 993                                           &can_link_devices,
 994                                           maybe_PERMS_REPORT, code) == -2) {
 995                                 if (!copy_dest)
 996                                         return;
 997                                 itemizing = code = 0;
 998                         }
 999                 }
1000                 if (statret != 0
1001                  || (st.st_mode & ~CHMOD_BITS) != (file->mode & ~CHMOD_BITS)
1002                  || st.st_rdev != file->u.rdev) {
1003                         if (statret == 0
1004                          && delete_item(fname, st.st_mode, DEL_TERSE) < 0)
1005                                 return;
1006                         if (preserve_hard_links && file->link_u.links
1007                             && hard_link_check(file, ndx, fname, -1, &st,
1008                                                itemizing, code, HL_SKIP))
1009                                 return;
1010                         if (!IS_DEVICE(st.st_mode))
1011                                 statret = -1;
1012                         if (verbose > 2) {
1013                                 rprintf(FINFO,"mknod(%s,0%o,0x%x)\n",
1014                                         safe_fname(fname),
1015                                         (int)file->mode, (int)file->u.rdev);
1016                         }
1017                         if (do_mknod(fname,file->mode,file->u.rdev) < 0) {
1018                                 rsyserr(FERROR, errno, "mknod %s failed",
1019                                         full_fname(fname));
1020                         } else {
1021                                 set_perms(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\n",
1028                                                 safe_fname(fname));
1029                                 }
1030                                 if (preserve_hard_links && file->link_u.links) {
1031                                         hard_link_cluster(file, ndx,
1032                                                           itemizing, code);
1033                                 }
1034                         }
1035                 } else {
1036                         if (itemizing)
1037                                 itemize(file, ndx, statret, &st, 0, 0, NULL);
1038                         set_perms(fname, file, &st, maybe_PERMS_REPORT);
1039                         if (preserve_hard_links && file->link_u.links)
1040                                 hard_link_cluster(file, ndx, itemizing, code);
1041                 }
1042                 return;
1043         }
1044
1045         if (!S_ISREG(file->mode)) {
1046                 if (the_file_list->count == 1)
1047                         fname = f_name(file);
1048                 rprintf(FINFO, "skipping non-regular file \"%s\"\n",
1049                         safe_fname(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);
1057                         rprintf(FINFO, "%s is over max-size\n",
1058                                 safe_fname(fname));
1059                 }
1060                 return;
1061         }
1062         if (min_size && file->length < min_size) {
1063                 if (verbose > 1) {
1064                         if (the_file_list->count == 1)
1065                                 fname = f_name(file);
1066                         rprintf(FINFO, "%s is under min-size\n",
1067                                 safe_fname(fname));
1068                 }
1069                 return;
1070         }
1071
1072         if (ignore_existing && statret == 0) {
1073                 if (verbose > 1)
1074                         rprintf(FINFO, "%s exists\n", safe_fname(fname));
1075                 return;
1076         }
1077
1078         if (update_only && statret == 0
1079             && cmp_modtime(st.st_mtime, file->modtime) > 0) {
1080                 if (verbose > 1)
1081                         rprintf(FINFO, "%s is newer\n", safe_fname(fname));
1082                 return;
1083         }
1084
1085         fnamecmp = fname;
1086         fnamecmp_type = FNAMECMP_FNAME;
1087
1088         if (statret == 0 && !S_ISREG(st.st_mode)) {
1089                 if (delete_item(fname, st.st_mode, DEL_TERSE) != 0)
1090                         return;
1091                 statret = -1;
1092                 stat_errno = ENOENT;
1093         }
1094
1095         if (statret != 0 && basis_dir[0] != NULL) {
1096                 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &st,
1097                                       itemizing, maybe_PERMS_REPORT, code);
1098                 if (j == -2)
1099                         return;
1100                 if (j != -1) {
1101                         fnamecmp = fnamecmpbuf;
1102                         fnamecmp_type = j;
1103                         statret = 0;
1104                 }
1105         }
1106
1107         real_ret = statret;
1108         real_st = st;
1109
1110         if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1111             && link_stat(partialptr, &partial_st, 0) == 0
1112             && S_ISREG(partial_st.st_mode)) {
1113                 if (statret != 0)
1114                         goto prepare_to_open;
1115         } else
1116                 partialptr = NULL;
1117
1118         if (statret != 0 && fuzzy_basis && dry_run <= 1) {
1119                 int j = find_fuzzy(file, fuzzy_dirlist);
1120                 if (j >= 0) {
1121                         fuzzy_file = fuzzy_dirlist->files[j];
1122                         f_name_to(fuzzy_file, fnamecmpbuf);
1123                         if (verbose > 2) {
1124                                 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1125                                         safe_fname(fname), safe_fname(fnamecmpbuf));
1126                         }
1127                         st.st_size = fuzzy_file->length;
1128                         statret = 0;
1129                         fnamecmp = fnamecmpbuf;
1130                         fnamecmp_type = FNAMECMP_FUZZY;
1131                 }
1132         }
1133
1134         if (statret != 0) {
1135                 if (preserve_hard_links && file->link_u.links
1136                     && hard_link_check(file, ndx, fname, statret, &st,
1137                                        itemizing, code, HL_SKIP))
1138                         return;
1139                 if (stat_errno == ENOENT)
1140                         goto notify_others;
1141                 rsyserr(FERROR, stat_errno, "recv_generator: failed to stat %s",
1142                         full_fname(fname));
1143                 return;
1144         }
1145
1146         if (append_mode && st.st_size > file->length)
1147                 return;
1148
1149         if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1150                 ;
1151         else if (fnamecmp_type == FNAMECMP_FUZZY)
1152                 ;
1153         else if (unchanged_file(fnamecmp, file, &st)) {
1154                 if (partialptr) {
1155                         do_unlink(partialptr);
1156                         handle_partial_dir(partialptr, PDIR_DELETE);
1157                 }
1158                 if (itemizing) {
1159                         itemize(file, ndx, real_ret, &real_st,
1160                                 0, 0, NULL);
1161                 }
1162                 set_perms(fname, file, &st, maybe_PERMS_REPORT);
1163                 if (preserve_hard_links && file->link_u.links)
1164                         hard_link_cluster(file, ndx, itemizing, code);
1165                 return;
1166         }
1167
1168   prepare_to_open:
1169         if (partialptr) {
1170                 st = partial_st;
1171                 fnamecmp = partialptr;
1172                 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1173                 statret = 0;
1174         }
1175
1176         if (!do_xfers || read_batch || whole_file)
1177                 goto notify_others;
1178
1179         if (fuzzy_basis) {
1180                 int j = flist_find(fuzzy_dirlist, file);
1181                 if (j >= 0) /* don't use changing file as future fuzzy basis */
1182                         fuzzy_dirlist->files[j]->flags |= FLAG_NO_FUZZY;
1183         }
1184
1185         /* open the file */
1186         fd = do_open(fnamecmp, O_RDONLY, 0);
1187
1188         if (fd == -1) {
1189                 rsyserr(FERROR, errno, "failed to open %s, continuing",
1190                         full_fname(fnamecmp));
1191           pretend_missing:
1192                 /* pretend the file didn't exist */
1193                 if (preserve_hard_links && file->link_u.links
1194                     && hard_link_check(file, ndx, fname, statret, &st,
1195                                        itemizing, code, HL_SKIP))
1196                         return;
1197                 statret = real_ret = -1;
1198                 goto notify_others;
1199         }
1200
1201         if (inplace && make_backups && fnamecmp_type == FNAMECMP_FNAME) {
1202                 if (!(backupptr = get_backup_name(fname))) {
1203                         close(fd);
1204                         return;
1205                 }
1206                 if (!(back_file = make_file(fname, NULL, NO_FILTERS))) {
1207                         close(fd);
1208                         goto pretend_missing;
1209                 }
1210                 if (robust_unlink(backupptr) && errno != ENOENT) {
1211                         rsyserr(FERROR, errno, "unlink %s",
1212                                 full_fname(backupptr));
1213                         free(back_file);
1214                         close(fd);
1215                         return;
1216                 }
1217                 if ((f_copy = do_open(backupptr,
1218                     O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1219                         rsyserr(FERROR, errno, "open %s",
1220                                 full_fname(backupptr));
1221                         free(back_file);
1222                         close(fd);
1223                         return;
1224                 }
1225                 fnamecmp_type = FNAMECMP_BACKUP;
1226         }
1227
1228         if (verbose > 3) {
1229                 rprintf(FINFO, "gen mapped %s of size %.0f\n",
1230                         safe_fname(fnamecmp), (double)st.st_size);
1231         }
1232
1233         if (verbose > 2)
1234                 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1235
1236   notify_others:
1237         write_int(f_out, ndx);
1238         if (itemizing) {
1239                 int iflags = ITEM_TRANSFER;
1240                 if (always_checksum)
1241                         iflags |= ITEM_REPORT_CHECKSUM;
1242                 if (fnamecmp_type != FNAMECMP_FNAME)
1243                         iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1244                 if (fnamecmp_type == FNAMECMP_FUZZY)
1245                         iflags |= ITEM_XNAME_FOLLOWS;
1246                 itemize(file, -1, real_ret, &real_st, iflags, fnamecmp_type,
1247                         fuzzy_file ? fuzzy_file->basename : NULL);
1248         }
1249
1250         if (!do_xfers) {
1251                 if (preserve_hard_links && file->link_u.links)
1252                         hard_link_cluster(file, ndx, itemizing, code);
1253                 return;
1254         }
1255         if (read_batch)
1256                 return;
1257
1258         if (statret != 0 || whole_file) {
1259                 write_sum_head(f_out, NULL);
1260                 return;
1261         }
1262
1263         generate_and_send_sums(fd, st.st_size, f_out, f_copy);
1264
1265         if (f_copy >= 0) {
1266                 close(f_copy);
1267                 set_perms(backupptr, back_file, NULL, 0);
1268                 if (verbose > 1) {
1269                         rprintf(FINFO, "backed up %s to %s\n",
1270                                 safe_fname(fname), safe_fname(backupptr));
1271                 }
1272                 free(back_file);
1273         }
1274
1275         close(fd);
1276 }
1277
1278
1279 void generate_files(int f_out, struct file_list *flist, char *local_name)
1280 {
1281         int i;
1282         char fbuf[MAXPATHLEN];
1283         int itemizing, maybe_PERMS_REPORT;
1284         enum logcode code;
1285         int lull_mod = allowed_lull * 5;
1286         int need_retouch_dir_times = preserve_times && !omit_dir_times;
1287         int need_retouch_dir_perms = 0;
1288         int save_ignore_existing = ignore_existing;
1289         int save_ignore_non_existing = ignore_non_existing;
1290         int save_do_progress = do_progress;
1291         int save_make_backups = make_backups;
1292
1293         if (protocol_version >= 29) {
1294                 itemizing = 1;
1295                 maybe_PERMS_REPORT = log_format_has_i ? 0 : PERMS_REPORT;
1296                 code = daemon_log_format_has_i ? 0 : FLOG;
1297         } else if (am_daemon) {
1298                 itemizing = daemon_log_format_has_i && do_xfers;
1299                 maybe_PERMS_REPORT = PERMS_REPORT;
1300                 code = itemizing || !do_xfers ? FCLIENT : FINFO;
1301         } else if (!am_server) {
1302                 itemizing = log_format_has_i;
1303                 maybe_PERMS_REPORT = log_format_has_i ? 0 : PERMS_REPORT;
1304                 code = itemizing ? 0 : FINFO;
1305         } else {
1306                 itemizing = 0;
1307                 maybe_PERMS_REPORT = PERMS_REPORT;
1308                 code = FINFO;
1309         }
1310
1311         if (verbose > 2) {
1312                 rprintf(FINFO, "generator starting pid=%ld count=%d\n",
1313                         (long)getpid(), flist->count);
1314         }
1315
1316         if (delete_before && !local_name && flist->count > 0)
1317                 do_delete_pass(flist);
1318         do_progress = 0;
1319
1320         if (append_mode || whole_file < 0)
1321                 whole_file = 0;
1322         if (verbose >= 2) {
1323                 rprintf(FINFO, "delta-transmission %s\n",
1324                         whole_file
1325                         ? "disabled for local transfer or --whole-file"
1326                         : "enabled");
1327         }
1328
1329         /* Since we often fill up the outgoing socket and then just sit around
1330          * waiting for the other 2 processes to do their thing, we don't want
1331          * to exit on a timeout.  If the data stops flowing, the receiver will
1332          * notice that and let us know via the redo pipe (or its closing). */
1333         ignore_timeout = 1;
1334
1335         for (i = 0; i < flist->count; i++) {
1336                 struct file_struct *file = flist->files[i];
1337
1338                 if (!file->basename)
1339                         continue;
1340
1341                 if (local_name)
1342                         strlcpy(fbuf, local_name, sizeof fbuf);
1343                 else
1344                         f_name_to(file, fbuf);
1345                 recv_generator(fbuf, file, i, itemizing, maybe_PERMS_REPORT,
1346                                code, f_out);
1347
1348                 /* We need to ensure that any dirs we create have writeable
1349                  * permissions during the time we are putting files within
1350                  * them.  This is then fixed after the transfer is done. */
1351 #ifdef HAVE_CHMOD
1352                 if (!am_root && S_ISDIR(file->mode) && !(file->mode & S_IWUSR)
1353                     && !list_only) {
1354                         int mode = file->mode | S_IWUSR; /* user write */
1355                         char *fname = local_name ? local_name : fbuf;
1356                         if (do_chmod(fname, mode) < 0) {
1357                                 rsyserr(FERROR, errno,
1358                                         "failed to modify permissions on %s",
1359                                         full_fname(fname));
1360                         }
1361                         need_retouch_dir_perms = 1;
1362                 }
1363 #endif
1364
1365                 if (preserve_hard_links)
1366                         check_for_finished_hlinks(itemizing, code);
1367
1368                 if (allowed_lull && !(i % lull_mod))
1369                         maybe_send_keepalive();
1370                 else if (!(i % 200))
1371                         maybe_flush_socket();
1372         }
1373         recv_generator(NULL, NULL, 0, 0, 0, code, -1);
1374         if (delete_during)
1375                 delete_in_dir(NULL, NULL, NULL);
1376
1377         phase++;
1378         csum_length = SUM_LENGTH;
1379         max_size = min_size = ignore_existing = ignore_non_existing = 0;
1380         update_only = always_checksum = size_only = 0;
1381         ignore_times = 1;
1382         if (append_mode)  /* resend w/o append mode */
1383                 append_mode = -1; /* ... but only longer files */
1384         make_backups = 0; /* avoid a duplicate backup for inplace processing */
1385
1386         if (verbose > 2)
1387                 rprintf(FINFO,"generate_files phase=%d\n",phase);
1388
1389         write_int(f_out, -1);
1390
1391         /* files can cycle through the system more than once
1392          * to catch initial checksum errors */
1393         while ((i = get_redo_num(itemizing, code)) != -1) {
1394                 struct file_struct *file = flist->files[i];
1395                 if (local_name)
1396                         strlcpy(fbuf, local_name, sizeof fbuf);
1397                 else
1398                         f_name_to(file, fbuf);
1399                 recv_generator(fbuf, file, i, itemizing, maybe_PERMS_REPORT,
1400                                code, f_out);
1401         }
1402
1403         phase++;
1404         ignore_non_existing = save_ignore_non_existing;
1405         ignore_existing = save_ignore_existing;
1406         make_backups = save_make_backups;
1407
1408         if (verbose > 2)
1409                 rprintf(FINFO,"generate_files phase=%d\n",phase);
1410
1411         write_int(f_out, -1);
1412         /* Reduce round-trip lag-time for a useless delay-updates phase. */
1413         if (protocol_version >= 29 && !delay_updates)
1414                 write_int(f_out, -1);
1415
1416         /* Read MSG_DONE for the redo phase (and any prior messages). */
1417         get_redo_num(itemizing, code);
1418
1419         if (protocol_version >= 29) {
1420                 phase++;
1421                 if (verbose > 2)
1422                         rprintf(FINFO, "generate_files phase=%d\n", phase);
1423                 if (delay_updates)
1424                         write_int(f_out, -1);
1425                 /* Read MSG_DONE for delay-updates phase & prior messages. */
1426                 get_redo_num(itemizing, code);
1427         }
1428
1429         do_progress = save_do_progress;
1430         if (delete_after && !local_name && flist->count > 0)
1431                 do_delete_pass(flist);
1432
1433         if ((need_retouch_dir_perms || need_retouch_dir_times)
1434             && !list_only && !local_name && !dry_run) {
1435                 int j = 0;
1436                 /* Now we need to fix any directory permissions that were
1437                  * modified during the transfer and/or re-set any tweaked
1438                  * modified-time values. */
1439                 for (i = 0; i < flist->count; i++) {
1440                         struct file_struct *file = flist->files[i];
1441                         if (!file->basename || !S_ISDIR(file->mode))
1442                                 continue;
1443                         if (!need_retouch_dir_times && file->mode & S_IWUSR)
1444                                 continue;
1445                         recv_generator(f_name(file), file, i, itemizing,
1446                                        maybe_PERMS_REPORT, code, -1);
1447                         if (allowed_lull && !(++j % lull_mod))
1448                                 maybe_send_keepalive();
1449                         else if (!(j % 200))
1450                                 maybe_flush_socket();
1451                 }
1452         }
1453         recv_generator(NULL, NULL, 0, 0, 0, code, -1);
1454
1455         if (max_delete > 0 && deletion_count > max_delete) {
1456                 rprintf(FINFO,
1457                         "Deletions stopped due to --max-delete limit (%d skipped)\n",
1458                         deletion_count - max_delete);
1459                 io_error |= IOERR_DEL_LIMIT;
1460         }
1461
1462         if (verbose > 2)
1463                 rprintf(FINFO,"generate_files finished\n");
1464 }