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 log_format_has_i;
  30 extern int daemon_log_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 recurse;
  36 extern int relative_paths;
  37 extern int implied_dirs;
  38 extern int keep_dirlinks;
  39 extern int preserve_links;
  40 extern int preserve_devices;
  41 extern int preserve_specials;
  42 extern int preserve_hard_links;
  43 extern int preserve_perms;
  44 extern int preserve_uid;
  45 extern int preserve_gid;
  46 extern int preserve_times;
  47 extern int omit_dir_times;
  48 extern int delete_mode;
  49 extern int delete_before;
  50 extern int delete_during;
  51 extern int delete_after;
  52 extern int module_id;
  53 extern int sanitize_paths;
  54 extern int startdir_depth;
  55 extern int ignore_errors;
  56 extern int remove_sent_files;
  57 extern int delay_updates;
  58 extern int update_only;
  59 extern int ignore_existing;
  60 extern int ignore_non_existing;
  61 extern int inplace;
  62 extern int append_mode;
  63 extern int make_backups;
  64 extern int csum_length;
  65 extern int ignore_times;
  66 extern int size_only;
  67 extern OFF_T max_size;
  68 extern OFF_T min_size;
  69 extern int io_error;
  70 extern int allowed_lull;
  71 extern int sock_f_out;
  72 extern int ignore_timeout;
  73 extern int protocol_version;
  74 extern int fuzzy_basis;
  75 extern int always_checksum;
  76 extern int checksum_len;
  77 extern char *partial_dir;
  78 extern char *basis_dir[];
  79 extern int compare_dest;
  80 extern int copy_dest;
  81 extern int link_dest;
  82 extern int whole_file;
  83 extern int list_only;
  84 extern int read_batch;
  85 extern int safe_symlinks;
  86 extern long block_size; /* "long" because popt can't set an int32. */
  87 extern int max_delete;
  88 extern int force_delete;
  89 extern int one_file_system;
  90 extern struct stats stats;
  91 extern dev_t filesystem_dev;
  92 extern char *backup_dir;
  93 extern char *backup_suffix;
  94 extern int backup_suffix_len;
  95 extern struct file_list *the_file_list;
  96 extern struct filter_list_struct server_filter_list;
  97
  98 static int deletion_count = 0; /* used to implement --max-delete */
  99
 100 /* For calling delete_file() */
 101 #define DEL_FORCE_RECURSE       (1<<1) /* recurse even w/o --force */
 102 #define DEL_TERSE               (1<<3)
 103
 104
 105 static int is_backup_file(char *fn)
 106 {
 107         int k = strlen(fn) - backup_suffix_len;
 108         return k > 0 && strcmp(fn+k, backup_suffix) == 0;
 109 }
 110
 111
 112 /* Delete a file or directory.  If DEL_FORCE_RECURSE is set in the flags, or if
 113  * force_delete is set, this will delete recursively.
 114  *
 115  * Note that fname must point to a MAXPATHLEN buffer if the mode indicates it's
 116  * a directory! (The buffer is used for recursion, but returned unchanged.)
 117  */
 118 static int delete_item(char *fname, int mode, int flags)
 119 {
 120         struct file_list *dirlist;
 121         int j, dlen, zap_dir, ok;
 122         unsigned remainder;
 123         void *save_filters;
 124         char *p;
 125
 126         if (!S_ISDIR(mode)) {
 127                 if (max_delete && ++deletion_count > max_delete)
 128                         return 0;
 129                 if (make_backups && (backup_dir || !is_backup_file(fname)))
 130                         ok = make_backup(fname);
 131                 else
 132                         ok = robust_unlink(fname) == 0;
 133                 if (ok) {
 134                         if (!(flags & DEL_TERSE))
 135                                 log_delete(fname, mode);
 136                         return 0;
 137                 }
 138                 if (errno == ENOENT) {
 139                         deletion_count--;
 140                         return 0;
 141                 }
 142                 rsyserr(FERROR, errno, "delete_file: unlink %s failed",
 143                         full_fname(fname));
 144                 return -1;
 145         }
 146
 147         zap_dir = flags & DEL_FORCE_RECURSE || force_delete;
 148         if ((max_delete && ++deletion_count > max_delete)
 149             || (dry_run && zap_dir)) {
 150                 ok = 0;
 151                 errno = ENOTEMPTY;
 152         } else if (make_backups && !backup_dir && !is_backup_file(fname)
 153             && !(flags & DEL_FORCE_RECURSE))
 154                 ok = make_backup(fname);
 155         else
 156                 ok = do_rmdir(fname) == 0;
 157         if (ok) {
 158                 if (!(flags & DEL_TERSE))
 159                         log_delete(fname, mode);
 160                 return 0;
 161         }
 162         if (errno == ENOENT) {
 163                 deletion_count--;
 164                 return 0;
 165         }
 166         if (!zap_dir) {
 167                 rsyserr(FERROR, errno, "delete_file: rmdir %s failed",
 168                         full_fname(fname));
 169                 return -1;
 170         }
 171         flags |= DEL_FORCE_RECURSE; /* mark subdir dels as not "in the way" */
 172         deletion_count--;
 173
 174         dlen = strlen(fname);
 175         save_filters = push_local_filters(fname, dlen);
 176
 177         dirlist = get_dirlist(fname, dlen, 0);
 178
 179         p = fname + dlen;
 180         if (dlen != 1 || *fname != '/')
 181                 *p++ = '/';
 182         remainder = MAXPATHLEN - (p - fname);
 183
 184         for (j = dirlist->count; j--; ) {
 185                 struct file_struct *fp = dirlist->files[j];
 186
 187                 if (fp->flags & FLAG_MOUNT_POINT)
 188                         continue;
 189
 190                 strlcpy(p, fp->basename, remainder);
 191                 delete_item(fname, fp->mode, flags & ~DEL_TERSE);
 192         }
 193         flist_free(dirlist);
 194
 195         fname[dlen] = '\0';
 196
 197         pop_local_filters(save_filters);
 198
 199         if (max_delete && ++deletion_count > max_delete)
 200                 return 0;
 201
 202         if (do_rmdir(fname) == 0) {
 203                 if (!(flags & DEL_TERSE))
 204                         log_delete(fname, mode);
 205         } else if (errno != ENOTEMPTY && errno != EEXIST && errno != ENOENT) {
 206                 rsyserr(FERROR, errno, "delete_file: rmdir %s failed",
 207                         full_fname(fname));
 208                 return -1;
 209         }
 210
 211         return 0;
 212 }
 213
 214
 215 /* This function is used to implement per-directory deletion, and is used by
 216  * all the --delete-WHEN options.  Note that the fbuf pointer must point to a
 217  * MAXPATHLEN buffer with the name of the directory in it (the functions we
 218  * call will append names onto the end, but the old dir value will be restored
 219  * on exit). */
 220 static void delete_in_dir(struct file_list *flist, char *fbuf,
 221                           struct file_struct *file, STRUCT_STAT *stp)
 222 {
 223         static int min_depth = MAXPATHLEN, cur_depth = -1;
 224         static void *filt_array[MAXPATHLEN/2+1];
 225         static int already_warned = 0;
 226         struct file_list *dirlist;
 227         char delbuf[MAXPATHLEN];
 228         int dlen, i;
 229
 230         if (!flist) {
 231                 while (cur_depth >= min_depth)
 232                         pop_local_filters(filt_array[cur_depth--]);
 233                 min_depth = MAXPATHLEN;
 234                 cur_depth = -1;
 235                 return;
 236         }
 237
 238         if (verbose > 2)
 239                 rprintf(FINFO, "delete_in_dir(%s)\n", fbuf);
 240
 241         if (allowed_lull)
 242                 maybe_send_keepalive();
 243
 244         if (file->dir.depth >= MAXPATHLEN/2+1)
 245                 return; /* Impossible... */
 246
 247         if (io_error && !(lp_ignore_errors(module_id) || ignore_errors)) {
 248                 if (already_warned)
 249                         return;
 250                 rprintf(FINFO,
 251                         "IO error encountered -- skipping file deletion\n");
 252                 already_warned = 1;
 253                 return;
 254         }
 255
 256         while (cur_depth >= file->dir.depth && cur_depth >= min_depth)
 257                 pop_local_filters(filt_array[cur_depth--]);
 258         cur_depth = file->dir.depth;
 259         if (min_depth > cur_depth)
 260                 min_depth = cur_depth;
 261         dlen = strlen(fbuf);
 262         filt_array[cur_depth] = push_local_filters(fbuf, dlen);
 263
 264         if (one_file_system) {
 265                 if (file->flags & FLAG_TOP_DIR)
 266                         filesystem_dev = stp->st_dev;
 267                 else if (filesystem_dev != stp->st_dev)
 268                         return;
 269         }
 270
 271         dirlist = get_dirlist(fbuf, dlen, 0);
 272
 273         /* If an item in dirlist is not found in flist, delete it
 274          * from the filesystem. */
 275         for (i = dirlist->count; i--; ) {
 276                 struct file_struct *fp = dirlist->files[i];
 277                 if (!fp->basename || fp->flags & FLAG_MOUNT_POINT)
 278                         continue;
 279                 if (flist_find(flist, fp) < 0) {
 280                         f_name(fp, delbuf);
 281                         delete_item(delbuf, fp->mode, DEL_FORCE_RECURSE);
 282                 }
 283         }
 284
 285         flist_free(dirlist);
 286 }
 287
 288 /* This deletes any files on the receiving side that are not present on the
 289  * sending side.  This is used by --delete-before and --delete-after. */
 290 static void do_delete_pass(struct file_list *flist)
 291 {
 292         char fbuf[MAXPATHLEN];
 293         STRUCT_STAT st;
 294         int j;
 295
 296         if (dry_run > 1 /* destination doesn't exist yet */
 297          || list_only)
 298                 return;
 299
 300         for (j = 0; j < flist->count; j++) {
 301                 struct file_struct *file = flist->files[j];
 302
 303                 if (!(file->flags & FLAG_DEL_HERE))
 304                         continue;
 305
 306                 f_name(file, fbuf);
 307                 if (verbose > 1 && file->flags & FLAG_TOP_DIR)
 308                         rprintf(FINFO, "deleting in %s\n", fbuf);
 309
 310                 if (link_stat(fbuf, &st, keep_dirlinks) < 0
 311                  || !S_ISDIR(st.st_mode))
 312                         continue;
 313
 314                 delete_in_dir(flist, fbuf, file, &st);
 315         }
 316         delete_in_dir(NULL, NULL, NULL, NULL);
 317
 318         if (do_progress && !am_server)
 319                 rprintf(FINFO, "                    \r");
 320 }
 321
 322 int unchanged_attrs(struct file_struct *file, STRUCT_STAT *st)
 323 {
 324         if (preserve_perms
 325          && (st->st_mode & CHMOD_BITS) != (file->mode & CHMOD_BITS))
 326                 return 0;
 327
 328         if (am_root && preserve_uid && st->st_uid != file->uid)
 329                 return 0;
 330
 331         if (preserve_gid && file->gid != GID_NONE && st->st_gid != file->gid)
 332                 return 0;
 333
 334         return 1;
 335 }
 336
 337 void itemize(struct file_struct *file, int ndx, int statret, STRUCT_STAT *st,
 338              int32 iflags, uchar fnamecmp_type, char *xname)
 339 {
 340         if (statret >= 0) { /* A from-dest-dir statret can == 1! */
 341                 int keep_time = !preserve_times ? 0
 342                     : S_ISDIR(file->mode) ? !omit_dir_times
 343                     : !S_ISLNK(file->mode);
 344
 345                 if (S_ISREG(file->mode) && file->length != st->st_size)
 346                         iflags |= ITEM_REPORT_SIZE;
 347                 if ((iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !keep_time
 348                      && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
 349                     || (keep_time && cmp_time(file->modtime, st->st_mtime) != 0))
 350                         iflags |= ITEM_REPORT_TIME;
 351                 if ((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           || log_format_has_i > 1 || (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_time(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_time(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_ATTRS_REPORT, enum logcode code)
 610 {
 611         int save_ignore_times = ignore_times;
 612         int save_size_only = size_only;
 613         int best_match = -1;
 614         int match_level = 0;
 615         int j = 0;
 616
 617         /* We can't let these send-affecting options affect our checking
 618          * for identical files in the alternate basis dirs. */
 619         ignore_times = size_only = 0;
 620
 621         do {
 622                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 623                 if (link_stat(cmpbuf, stp, 0) < 0 || !S_ISREG(stp->st_mode))
 624                         continue;
 625                 switch (match_level) {
 626                 case 0:
 627                         best_match = j;
 628                         match_level = 1;
 629                         /* FALL THROUGH */
 630                 case 1:
 631                         if (!unchanged_file(cmpbuf, file, stp))
 632                                 continue;
 633                         best_match = j;
 634                         match_level = 2;
 635                         /* FALL THROUGH */
 636                 case 2:
 637                         if (!unchanged_attrs(file, stp))
 638                                 continue;
 639                         if (always_checksum
 640                          && cmp_time(stp->st_mtime, file->modtime))
 641                                 continue;
 642                         best_match = j;
 643                         match_level = 3;
 644                         break;
 645                 }
 646                 break;
 647         } while (basis_dir[++j] != NULL);
 648
 649         ignore_times = save_ignore_times;
 650         size_only = save_size_only;
 651
 652         if (!match_level)
 653                 return -1;
 654
 655         if (j != best_match) {
 656                 j = best_match;
 657                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 658                 if (link_stat(cmpbuf, stp, 0) < 0)
 659                         match_level = 0;
 660         }
 661
 662 #ifdef HAVE_LINK
 663         if (match_level == 3 && !copy_dest) {
 664                 if (link_dest) {
 665                         if (hard_link_one(file, ndx, fname, 0, stp,
 666                                           cmpbuf, 1,
 667                                           itemizing && verbose > 1,
 668                                           code) < 0)
 669                                 goto try_a_copy;
 670                         if (preserve_hard_links && file->link_u.links)
 671                                 hard_link_cluster(file, ndx, itemizing, code);
 672                 } else if (itemizing)
 673                         itemize(file, ndx, 0, stp, 0, 0, NULL);
 674                 if (verbose > 1 && maybe_ATTRS_REPORT) {
 675                         code = daemon_log_format_has_i || dry_run
 676                              ? FCLIENT : FINFO;
 677                         rprintf(code, "%s is uptodate\n", fname);
 678                 }
 679                 return -2;
 680         }
 681 #endif
 682
 683         if (match_level >= 2) {
 684           try_a_copy: /* Copy the file locally. */
 685                 if (copy_file(cmpbuf, fname, file->mode) < 0) {
 686                         if (verbose) {
 687                                 rsyserr(FINFO, errno, "copy_file %s => %s",
 688                                         full_fname(cmpbuf), fname);
 689                         }
 690                         return -1;
 691                 }
 692                 if (itemizing)
 693                         itemize(file, ndx, 0, stp, ITEM_LOCAL_CHANGE, 0, NULL);
 694                 set_file_attrs(fname, file, NULL, 0);
 695                 if (maybe_ATTRS_REPORT
 696                  && ((!itemizing && verbose && match_level == 2)
 697                   || (verbose > 1 && match_level == 3))) {
 698                         code = daemon_log_format_has_i || dry_run
 699                              ? FCLIENT : FINFO;
 700                         rprintf(code, "%s%s\n", fname,
 701                                 match_level == 3 ? " is uptodate" : "");
 702                 }
 703                 if (preserve_hard_links && file->link_u.links)
 704                         hard_link_cluster(file, ndx, itemizing, code);
 705                 return -2;
 706         }
 707
 708         return FNAMECMP_BASIS_DIR_LOW + j;
 709 }
 710
 711 /* This is only called for non-regular files.  We return -2 if we've finished
 712  * handling the file, or -1 if no dest-linking occurred. */
 713 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
 714                          int itemizing, int maybe_ATTRS_REPORT,
 715                          enum logcode code)
 716 {
 717         char fnamebuf[MAXPATHLEN];
 718         STRUCT_STAT st;
 719         int i = 0;
 720
 721         do {
 722                 pathjoin(fnamebuf, MAXPATHLEN, basis_dir[i], fname);
 723                 if (link_stat(fnamebuf, &st, 0) < 0 || S_ISDIR(st.st_mode)
 724                  || !unchanged_attrs(file, &st))
 725                         continue;
 726                 if (S_ISLNK(file->mode)) {
 727 #ifdef SUPPORT_LINKS
 728                         char lnk[MAXPATHLEN];
 729                         int len;
 730                         if ((len = readlink(fnamebuf, lnk, MAXPATHLEN-1)) <= 0)
 731                                 continue;
 732                         lnk[len] = '\0';
 733                         if (strcmp(lnk, file->u.link) != 0)
 734 #endif
 735                                 continue;
 736                 } else if (IS_SPECIAL(file->mode)) {
 737                         if (!IS_SPECIAL(st.st_mode) || st.st_rdev != file->u.rdev)
 738                                 continue;
 739                 } else if (IS_DEVICE(file->mode)) {
 740                         if (!IS_DEVICE(st.st_mode) || st.st_rdev != file->u.rdev)
 741                                 continue;
 742                 } else {
 743                         rprintf(FERROR,
 744                                 "internal: try_dests_non() called with invalid mode (%o)\n",
 745                                 file->mode);
 746                         exit_cleanup(RERR_UNSUPPORTED);
 747                 }
 748                 if (link_dest
 749 #ifndef CAN_HARDLINK_SYMLINK
 750                  && !S_ISLNK(file->mode)
 751 #endif
 752 #ifndef CAN_HARDLINK_SPECIAL
 753                  && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
 754 #endif
 755                 ) {
 756                         if (do_link(fnamebuf, fname) < 0) {
 757                                 rsyserr(FERROR, errno,
 758                                         "failed to hard-link %s with %s",
 759                                         fnamebuf, fname);
 760                                 break;
 761                         }
 762                         if (preserve_hard_links && file->link_u.links)
 763                                 hard_link_cluster(file, ndx, itemizing, code);
 764                 }
 765                 if (itemizing && log_format_has_i && verbose > 1) {
 766                         int changes = compare_dest ? 0 : ITEM_LOCAL_CHANGE
 767                                     + (link_dest ? ITEM_XNAME_FOLLOWS : 0);
 768                         char *lp = link_dest ? "" : NULL;
 769                         itemize(file, ndx, 0, &st, changes, 0, lp);
 770                 }
 771                 if (verbose > 1 && maybe_ATTRS_REPORT) {
 772                         code = daemon_log_format_has_i || dry_run
 773                              ? FCLIENT : FINFO;
 774                         rprintf(code, "%s is uptodate\n", fname);
 775                 }
 776                 return -2;
 777         } while (basis_dir[++i] != NULL);
 778
 779         return -1;
 780 }
 781
 782 static int phase = 0;
 783
 784 /* Acts on the_file_list->file's ndx'th item, whose name is fname.  If a dir,
 785  * make sure it exists, and has the right permissions/timestamp info.  For
 786  * all other non-regular files (symlinks, etc.) we create them here.  For
 787  * regular files that have changed, we try to find a basis file and then
 788  * start sending checksums.
 789  *
 790  * When fname is non-null, it must point to a MAXPATHLEN buffer!
 791  *
 792  * Note that f_out is set to -1 when doing final directory-permission and
 793  * modification-time repair. */
 794 static void recv_generator(char *fname, struct file_struct *file, int ndx,
 795                            int itemizing, int maybe_ATTRS_REPORT,
 796                            enum logcode code, int f_out)
 797 {
 798         static int missing_below = -1, excluded_below = -1;
 799         static char *parent_dirname = "";
 800         static struct file_list *fuzzy_dirlist = NULL;
 801         static int need_fuzzy_dirlist = 0;
 802         struct file_struct *fuzzy_file = NULL;
 803         int fd = -1, f_copy = -1;
 804         STRUCT_STAT st, real_st, partial_st;
 805         struct file_struct *back_file = NULL;
 806         int statret, real_ret, stat_errno;
 807         char *fnamecmp, *partialptr, *backupptr = NULL;
 808         char fnamecmpbuf[MAXPATHLEN];
 809         uchar fnamecmp_type;
 810         int del_opts = DEL_TERSE | (delete_mode ? DEL_FORCE_RECURSE : 0);
 811
 812         if (list_only)
 813                 return;
 814
 815         if (!fname) {
 816                 if (fuzzy_dirlist) {
 817                         flist_free(fuzzy_dirlist);
 818                         fuzzy_dirlist = NULL;
 819                 }
 820                 if (missing_below >= 0) {
 821                         dry_run--;
 822                         missing_below = -1;
 823                 }
 824                 parent_dirname = "";
 825                 return;
 826         }
 827
 828         if (verbose > 2)
 829                 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
 830
 831         if (server_filter_list.head) {
 832                 if (excluded_below >= 0) {
 833                         if (file->dir.depth > excluded_below)
 834                                 goto skipping;
 835                         excluded_below = -1;
 836                 }
 837                 if (check_filter(&server_filter_list, fname,
 838                                  S_ISDIR(file->mode)) < 0) {
 839                         if (S_ISDIR(file->mode))
 840                                 excluded_below = file->dir.depth;
 841                   skipping:
 842                         if (verbose) {
 843                                 rprintf(FINFO,
 844                                         "skipping server-excluded file \"%s\"\n",
 845                                         fname);
 846                         }
 847                         return;
 848                 }
 849         }
 850
 851         if (missing_below >= 0 && file->dir.depth <= missing_below) {
 852                 dry_run--;
 853                 missing_below = -1;
 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                          && do_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                         }
 931                 }
 932                 if (set_file_attrs(fname, file, statret ? NULL : &st, 0)
 933                     && verbose && code && f_out != -1)
 934                         rprintf(code, "%s/\n", fname);
 935                 if (delete_during && f_out != -1 && !phase && dry_run < 2
 936                     && (file->flags & FLAG_DEL_HERE))
 937                         delete_in_dir(the_file_list, fname, file, &st);
 938                 return;
 939         }
 940
 941         if (preserve_hard_links && file->link_u.links
 942             && hard_link_check(file, ndx, fname, statret, &st,
 943                                itemizing, code, HL_CHECK_MASTER))
 944                 return;
 945
 946         if (preserve_links && S_ISLNK(file->mode)) {
 947 #ifdef SUPPORT_LINKS
 948                 if (safe_symlinks && unsafe_symlink(file->u.link, fname)) {
 949                         if (verbose) {
 950                                 if (the_file_list->count == 1)
 951                                         fname = f_name(file, NULL);
 952                                 rprintf(FINFO,
 953                                         "ignoring unsafe symlink %s -> \"%s\"\n",
 954                                         full_fname(fname), file->u.link);
 955                         }
 956                         return;
 957                 }
 958                 if (sanitize_paths) {
 959                         sanitize_path(file->u.link, file->u.link, "",
 960                                       startdir_depth + file->dir.depth - 1);
 961                 }
 962                 if (statret == 0) {
 963                         char lnk[MAXPATHLEN];
 964                         int len;
 965
 966                         if (!S_ISDIR(st.st_mode)
 967                             && (len = readlink(fname, lnk, MAXPATHLEN-1)) > 0) {
 968                                 lnk[len] = 0;
 969                                 /* A link already pointing to the
 970                                  * right place -- no further action
 971                                  * required. */
 972                                 if (strcmp(lnk, file->u.link) == 0) {
 973                                         if (itemizing) {
 974                                                 itemize(file, ndx, 0, &st, 0,
 975                                                         0, NULL);
 976                                         }
 977                                         set_file_attrs(fname, file, &st,
 978                                                        maybe_ATTRS_REPORT);
 979                                         if (preserve_hard_links
 980                                             && file->link_u.links) {
 981                                                 hard_link_cluster(file, ndx,
 982                                                                   itemizing,
 983                                                                   code);
 984                                         }
 985                                         return;
 986                                 }
 987                         }
 988                         /* Not the right symlink (or not a symlink), so
 989                          * delete it. */
 990                         if (delete_item(fname, st.st_mode, del_opts) < 0)
 991                                 return;
 992                         if (!S_ISLNK(st.st_mode))
 993                                 statret = -1;
 994                 } else if (basis_dir[0] != NULL) {
 995                         if (try_dests_non(file, fname, ndx, itemizing,
 996                                           maybe_ATTRS_REPORT, code) == -2) {
 997 #ifndef CAN_HARDLINK_SYMLINK
 998                                 if (link_dest) {
 999                                         /* Resort to --copy-dest behavior. */
1000                                 } else
1001 #endif
1002                                 if (!copy_dest)
1003                                         return;
1004                                 itemizing = code = 0;
1005                         }
1006                 }
1007                 if (preserve_hard_links && file->link_u.links
1008                     && hard_link_check(file, ndx, fname, -1, &st,
1009                                        itemizing, code, HL_SKIP))
1010                         return;
1011                 if (do_symlink(file->u.link,fname) != 0) {
1012                         rsyserr(FERROR, errno, "symlink %s -> \"%s\" failed",
1013                                 full_fname(fname), file->u.link);
1014                 } else {
1015                         set_file_attrs(fname, file, NULL, 0);
1016                         if (itemizing) {
1017                                 itemize(file, ndx, statret, &st,
1018                                         ITEM_LOCAL_CHANGE, 0, NULL);
1019                         }
1020                         if (code && verbose) {
1021                                 rprintf(code, "%s -> %s\n", fname,
1022                                         file->u.link);
1023                         }
1024                         if (remove_sent_files && !dry_run) {
1025                                 char numbuf[4];
1026                                 SIVAL(numbuf, 0, ndx);
1027                                 send_msg(MSG_SUCCESS, numbuf, 4);
1028                         }
1029                         if (preserve_hard_links && file->link_u.links)
1030                                 hard_link_cluster(file, ndx, itemizing, code);
1031                 }
1032 #endif
1033                 return;
1034         }
1035
1036         if ((am_root && preserve_devices && IS_DEVICE(file->mode))
1037          || (preserve_specials && IS_SPECIAL(file->mode))) {
1038                 if (statret != 0 && basis_dir[0] != NULL) {
1039                         if (try_dests_non(file, fname, ndx, itemizing,
1040                                           maybe_ATTRS_REPORT, code) == -2) {
1041 #ifndef CAN_HARDLINK_SPECIAL
1042                                 if (link_dest) {
1043                                         /* Resort to --copy-dest behavior. */
1044                                 } else
1045 #endif
1046                                 if (!copy_dest)
1047                                         return;
1048                                 itemizing = code = 0;
1049                         }
1050                 }
1051                 if (statret != 0
1052                  || (st.st_mode & ~CHMOD_BITS) != (file->mode & ~CHMOD_BITS)
1053                  || st.st_rdev != file->u.rdev) {
1054                         if (statret == 0
1055                          && delete_item(fname, st.st_mode, del_opts) < 0)
1056                                 return;
1057                         if (preserve_hard_links && file->link_u.links
1058                             && hard_link_check(file, ndx, fname, -1, &st,
1059                                                itemizing, code, HL_SKIP))
1060                                 return;
1061                         if ((IS_DEVICE(file->mode) && !IS_DEVICE(st.st_mode))
1062                          || (IS_SPECIAL(file->mode) && !IS_SPECIAL(st.st_mode)))
1063                                 statret = -1;
1064                         if (verbose > 2) {
1065                                 rprintf(FINFO,"mknod(%s,0%o,0x%x)\n",
1066                                         fname,
1067                                         (int)file->mode, (int)file->u.rdev);
1068                         }
1069                         if (do_mknod(fname,file->mode,file->u.rdev) < 0) {
1070                                 rsyserr(FERROR, errno, "mknod %s failed",
1071                                         full_fname(fname));
1072                         } else {
1073                                 set_file_attrs(fname, file, NULL, 0);
1074                                 if (itemizing) {
1075                                         itemize(file, ndx, statret, &st,
1076                                                 ITEM_LOCAL_CHANGE, 0, NULL);
1077                                 }
1078                                 if (code && verbose)
1079                                         rprintf(code, "%s\n", fname);
1080                                 if (preserve_hard_links && file->link_u.links) {
1081                                         hard_link_cluster(file, ndx,
1082                                                           itemizing, code);
1083                                 }
1084                         }
1085                 } else {
1086                         if (itemizing)
1087                                 itemize(file, ndx, statret, &st, 0, 0, NULL);
1088                         set_file_attrs(fname, file, &st, maybe_ATTRS_REPORT);
1089                         if (preserve_hard_links && file->link_u.links)
1090                                 hard_link_cluster(file, ndx, itemizing, code);
1091                 }
1092                 return;
1093         }
1094
1095         if (!S_ISREG(file->mode)) {
1096                 if (the_file_list->count == 1)
1097                         fname = f_name(file, NULL);
1098                 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1099                 return;
1100         }
1101
1102         if (max_size && file->length > max_size) {
1103                 if (verbose > 1) {
1104                         if (the_file_list->count == 1)
1105                                 fname = f_name(file, NULL);
1106                         rprintf(FINFO, "%s is over max-size\n", fname);
1107                 }
1108                 return;
1109         }
1110         if (min_size && file->length < min_size) {
1111                 if (verbose > 1) {
1112                         if (the_file_list->count == 1)
1113                                 fname = f_name(file, NULL);
1114                         rprintf(FINFO, "%s is under min-size\n", fname);
1115                 }
1116                 return;
1117         }
1118
1119         if (ignore_existing && statret == 0) {
1120                 if (verbose > 1)
1121                         rprintf(FINFO, "%s exists\n", fname);
1122                 return;
1123         }
1124
1125         if (update_only && statret == 0
1126             && cmp_time(st.st_mtime, file->modtime) > 0) {
1127                 if (verbose > 1)
1128                         rprintf(FINFO, "%s is newer\n", fname);
1129                 return;
1130         }
1131
1132         fnamecmp = fname;
1133         fnamecmp_type = FNAMECMP_FNAME;
1134
1135         if (statret == 0 && !S_ISREG(st.st_mode)) {
1136                 if (delete_item(fname, st.st_mode, del_opts) != 0)
1137                         return;
1138                 statret = -1;
1139                 stat_errno = ENOENT;
1140         }
1141
1142         if (statret != 0 && basis_dir[0] != NULL) {
1143                 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &st,
1144                                       itemizing, maybe_ATTRS_REPORT, code);
1145                 if (j == -2)
1146                         return;
1147                 if (j != -1) {
1148                         fnamecmp = fnamecmpbuf;
1149                         fnamecmp_type = j;
1150                         statret = 0;
1151                 }
1152         }
1153
1154         real_ret = statret;
1155         real_st = st;
1156
1157         if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1158             && link_stat(partialptr, &partial_st, 0) == 0
1159             && S_ISREG(partial_st.st_mode)) {
1160                 if (statret != 0)
1161                         goto prepare_to_open;
1162         } else
1163                 partialptr = NULL;
1164
1165         if (statret != 0 && fuzzy_dirlist && dry_run <= 1) {
1166                 int j = find_fuzzy(file, fuzzy_dirlist);
1167                 if (j >= 0) {
1168                         fuzzy_file = fuzzy_dirlist->files[j];
1169                         f_name(fuzzy_file, fnamecmpbuf);
1170                         if (verbose > 2) {
1171                                 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1172                                         fname, fnamecmpbuf);
1173                         }
1174                         st.st_size = fuzzy_file->length;
1175                         statret = 0;
1176                         fnamecmp = fnamecmpbuf;
1177                         fnamecmp_type = FNAMECMP_FUZZY;
1178                 }
1179         }
1180
1181         if (statret != 0) {
1182                 if (preserve_hard_links && file->link_u.links
1183                     && hard_link_check(file, ndx, fname, statret, &st,
1184                                        itemizing, code, HL_SKIP))
1185                         return;
1186                 if (stat_errno == ENOENT)
1187                         goto notify_others;
1188                 rsyserr(FERROR, stat_errno, "recv_generator: failed to stat %s",
1189                         full_fname(fname));
1190                 return;
1191         }
1192
1193         if (append_mode && st.st_size > file->length)
1194                 return;
1195
1196         if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1197                 ;
1198         else if (fnamecmp_type == FNAMECMP_FUZZY)
1199                 ;
1200         else if (unchanged_file(fnamecmp, file, &st)) {
1201                 if (partialptr) {
1202                         do_unlink(partialptr);
1203                         handle_partial_dir(partialptr, PDIR_DELETE);
1204                 }
1205                 if (itemizing) {
1206                         itemize(file, ndx, real_ret, &real_st,
1207                                 0, 0, NULL);
1208                 }
1209                 set_file_attrs(fname, file, &st, maybe_ATTRS_REPORT);
1210                 if (preserve_hard_links && file->link_u.links)
1211                         hard_link_cluster(file, ndx, itemizing, code);
1212                 return;
1213         }
1214
1215   prepare_to_open:
1216         if (partialptr) {
1217                 st = partial_st;
1218                 fnamecmp = partialptr;
1219                 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1220                 statret = 0;
1221         }
1222
1223         if (!do_xfers || read_batch || whole_file)
1224                 goto notify_others;
1225
1226         if (fuzzy_dirlist) {
1227                 int j = flist_find(fuzzy_dirlist, file);
1228                 if (j >= 0) /* don't use changing file as future fuzzy basis */
1229                         fuzzy_dirlist->files[j]->flags |= FLAG_NO_FUZZY;
1230         }
1231
1232         /* open the file */
1233         fd = do_open(fnamecmp, O_RDONLY, 0);
1234
1235         if (fd == -1) {
1236                 rsyserr(FERROR, errno, "failed to open %s, continuing",
1237                         full_fname(fnamecmp));
1238           pretend_missing:
1239                 /* pretend the file didn't exist */
1240                 if (preserve_hard_links && file->link_u.links
1241                     && hard_link_check(file, ndx, fname, statret, &st,
1242                                        itemizing, code, HL_SKIP))
1243                         return;
1244                 statret = real_ret = -1;
1245                 goto notify_others;
1246         }
1247
1248         if (inplace && make_backups && fnamecmp_type == FNAMECMP_FNAME) {
1249                 if (!(backupptr = get_backup_name(fname))) {
1250                         close(fd);
1251                         return;
1252                 }
1253                 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1254                         close(fd);
1255                         goto pretend_missing;
1256                 }
1257                 if (robust_unlink(backupptr) && errno != ENOENT) {
1258                         rsyserr(FERROR, errno, "unlink %s",
1259                                 full_fname(backupptr));
1260                         free(back_file);
1261                         close(fd);
1262                         return;
1263                 }
1264                 if ((f_copy = do_open(backupptr,
1265                     O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1266                         rsyserr(FERROR, errno, "open %s",
1267                                 full_fname(backupptr));
1268                         free(back_file);
1269                         close(fd);
1270                         return;
1271                 }
1272                 fnamecmp_type = FNAMECMP_BACKUP;
1273         }
1274
1275         if (verbose > 3) {
1276                 rprintf(FINFO, "gen mapped %s of size %.0f\n",
1277                         fnamecmp, (double)st.st_size);
1278         }
1279
1280         if (verbose > 2)
1281                 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1282
1283   notify_others:
1284         if (remove_sent_files && !delay_updates && !phase)
1285             increment_active_files(ndx, itemizing, code);
1286         write_int(f_out, ndx);
1287         if (itemizing) {
1288                 int iflags = ITEM_TRANSFER;
1289                 if (always_checksum)
1290                         iflags |= ITEM_REPORT_CHECKSUM;
1291                 if (fnamecmp_type != FNAMECMP_FNAME)
1292                         iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1293                 if (fnamecmp_type == FNAMECMP_FUZZY)
1294                         iflags |= ITEM_XNAME_FOLLOWS;
1295                 itemize(file, -1, real_ret, &real_st, iflags, fnamecmp_type,
1296                         fuzzy_file ? fuzzy_file->basename : NULL);
1297         }
1298
1299         if (!do_xfers) {
1300                 if (preserve_hard_links && file->link_u.links)
1301                         hard_link_cluster(file, ndx, itemizing, code);
1302                 return;
1303         }
1304         if (read_batch)
1305                 return;
1306
1307         if (statret != 0 || whole_file) {
1308                 write_sum_head(f_out, NULL);
1309                 return;
1310         }
1311
1312         generate_and_send_sums(fd, st.st_size, f_out, f_copy);
1313
1314         if (f_copy >= 0) {
1315                 close(f_copy);
1316                 set_file_attrs(backupptr, back_file, NULL, 0);
1317                 if (verbose > 1) {
1318                         rprintf(FINFO, "backed up %s to %s\n",
1319                                 fname, backupptr);
1320                 }
1321                 free(back_file);
1322         }
1323
1324         close(fd);
1325 }
1326
1327 void generate_files(int f_out, struct file_list *flist, char *local_name)
1328 {
1329         int i;
1330         char fbuf[MAXPATHLEN];
1331         int itemizing, maybe_ATTRS_REPORT;
1332         enum logcode code;
1333         int lull_mod = allowed_lull * 5;
1334         int need_retouch_dir_times = preserve_times && !omit_dir_times;
1335         int need_retouch_dir_perms = 0;
1336         int save_ignore_existing = ignore_existing;
1337         int save_ignore_non_existing = ignore_non_existing;
1338         int save_do_progress = do_progress;
1339         int save_make_backups = make_backups;
1340         int dir_tweaking = !(list_only || local_name || dry_run);
1341
1342         if (protocol_version >= 29) {
1343                 itemizing = 1;
1344                 maybe_ATTRS_REPORT = log_format_has_i ? 0 : ATTRS_REPORT;
1345                 code = daemon_log_format_has_i ? 0 : FLOG;
1346         } else if (am_daemon) {
1347                 itemizing = daemon_log_format_has_i && do_xfers;
1348                 maybe_ATTRS_REPORT = ATTRS_REPORT;
1349                 code = itemizing || !do_xfers ? FCLIENT : FINFO;
1350         } else if (!am_server) {
1351                 itemizing = log_format_has_i;
1352                 maybe_ATTRS_REPORT = log_format_has_i ? 0 : ATTRS_REPORT;
1353                 code = itemizing ? 0 : FINFO;
1354         } else {
1355                 itemizing = 0;
1356                 maybe_ATTRS_REPORT = ATTRS_REPORT;
1357                 code = FINFO;
1358         }
1359
1360         if (verbose > 2) {
1361                 rprintf(FINFO, "generator starting pid=%ld count=%d\n",
1362                         (long)getpid(), flist->count);
1363         }
1364
1365         if (delete_before && !local_name && flist->count > 0)
1366                 do_delete_pass(flist);
1367         do_progress = 0;
1368
1369         if (append_mode || whole_file < 0)
1370                 whole_file = 0;
1371         if (verbose >= 2) {
1372                 rprintf(FINFO, "delta-transmission %s\n",
1373                         whole_file
1374                         ? "disabled for local transfer or --whole-file"
1375                         : "enabled");
1376         }
1377
1378         /* Since we often fill up the outgoing socket and then just sit around
1379          * waiting for the other 2 processes to do their thing, we don't want
1380          * to exit on a timeout.  If the data stops flowing, the receiver will
1381          * notice that and let us know via the redo pipe (or its closing). */
1382         ignore_timeout = 1;
1383
1384         for (i = 0; i < flist->count; i++) {
1385                 struct file_struct *file = flist->files[i];
1386
1387                 if (!file->basename)
1388                         continue;
1389
1390                 if (local_name)
1391                         strlcpy(fbuf, local_name, sizeof fbuf);
1392                 else
1393                         f_name(file, fbuf);
1394                 recv_generator(fbuf, file, i, itemizing, maybe_ATTRS_REPORT,
1395                                code, f_out);
1396
1397                 /* We need to ensure that any dirs we create have writeable
1398                  * permissions during the time we are putting files within
1399                  * them.  This is then fixed after the transfer is done. */
1400 #ifdef HAVE_CHMOD
1401                 if (!am_root && S_ISDIR(file->mode) && !(file->mode & S_IWUSR)
1402                  && dir_tweaking) {
1403                         mode_t mode = file->mode | S_IWUSR; /* user write */
1404                         char *fname = local_name ? local_name : fbuf;
1405                         if (do_chmod(fname, mode) < 0) {
1406                                 rsyserr(FERROR, errno,
1407                                         "failed to modify permissions on %s",
1408                                         full_fname(fname));
1409                         }
1410                         need_retouch_dir_perms = 1;
1411                 }
1412 #endif
1413
1414                 if (preserve_hard_links)
1415                         check_for_finished_hlinks(itemizing, code);
1416
1417                 if (allowed_lull && !(i % lull_mod))
1418                         maybe_send_keepalive();
1419                 else if (!(i % 200))
1420                         maybe_flush_socket();
1421         }
1422         recv_generator(NULL, NULL, 0, 0, 0, code, -1);
1423         if (delete_during)
1424                 delete_in_dir(NULL, NULL, NULL, NULL);
1425
1426         phase++;
1427         csum_length = SUM_LENGTH;
1428         max_size = min_size = ignore_existing = ignore_non_existing = 0;
1429         update_only = always_checksum = size_only = 0;
1430         ignore_times = 1;
1431         if (append_mode)  /* resend w/o append mode */
1432                 append_mode = -1; /* ... but only longer files */
1433         make_backups = 0; /* avoid a duplicate backup for inplace processing */
1434
1435         if (verbose > 2)
1436                 rprintf(FINFO,"generate_files phase=%d\n",phase);
1437
1438         write_int(f_out, -1);
1439
1440         /* files can cycle through the system more than once
1441          * to catch initial checksum errors */
1442         while ((i = get_redo_num(itemizing, code)) != -1) {
1443                 struct file_struct *file = flist->files[i];
1444                 if (local_name)
1445                         strlcpy(fbuf, local_name, sizeof fbuf);
1446                 else
1447                         f_name(file, fbuf);
1448                 recv_generator(fbuf, file, i, itemizing, maybe_ATTRS_REPORT,
1449                                code, f_out);
1450         }
1451
1452         phase++;
1453         ignore_non_existing = save_ignore_non_existing;
1454         ignore_existing = save_ignore_existing;
1455         make_backups = save_make_backups;
1456
1457         if (verbose > 2)
1458                 rprintf(FINFO,"generate_files phase=%d\n",phase);
1459
1460         write_int(f_out, -1);
1461         /* Reduce round-trip lag-time for a useless delay-updates phase. */
1462         if (protocol_version >= 29 && !delay_updates)
1463                 write_int(f_out, -1);
1464
1465         /* Read MSG_DONE for the redo phase (and any prior messages). */
1466         get_redo_num(itemizing, code);
1467
1468         if (protocol_version >= 29) {
1469                 phase++;
1470                 if (verbose > 2)
1471                         rprintf(FINFO, "generate_files phase=%d\n", phase);
1472                 if (delay_updates)
1473                         write_int(f_out, -1);
1474                 /* Read MSG_DONE for delay-updates phase & prior messages. */
1475                 get_redo_num(itemizing, code);
1476         }
1477
1478         do_progress = save_do_progress;
1479         if (delete_after && !local_name && flist->count > 0)
1480                 do_delete_pass(flist);
1481
1482         if ((need_retouch_dir_perms || need_retouch_dir_times) && dir_tweaking) {
1483                 int j = 0;
1484                 /* Now we need to fix any directory permissions that were
1485                  * modified during the transfer and/or re-set any tweaked
1486                  * modified-time values. */
1487                 for (i = 0; i < flist->count; i++) {
1488                         struct file_struct *file = flist->files[i];
1489
1490                         if (!file->basename || !S_ISDIR(file->mode))
1491                                 continue;
1492                         if (!need_retouch_dir_times && file->mode & S_IWUSR)
1493                                 continue;
1494                         recv_generator(f_name(file, NULL), file, i, itemizing,
1495                                        maybe_ATTRS_REPORT, code, -1);
1496                         if (allowed_lull && !(++j % lull_mod))
1497                                 maybe_send_keepalive();
1498                         else if (!(j % 200))
1499                                 maybe_flush_socket();
1500                 }
1501         }
1502         recv_generator(NULL, NULL, 0, 0, 0, code, -1);
1503
1504         if (max_delete > 0 && deletion_count > max_delete) {
1505                 rprintf(FINFO,
1506                         "Deletions stopped due to --max-delete limit (%d skipped)\n",
1507                         deletion_count - max_delete);
1508                 io_error |= IOERR_DEL_LIMIT;
1509         }
1510
1511         if (verbose > 2)
1512                 rprintf(FINFO,"generate_files finished\n");
1513 }