generator.c

   1 /*
   2  * Routines that are exclusive to the generator process.
   3  *
   4  * Copyright (C) 1996-2000 Andrew Tridgell
   5  * Copyright (C) 1996 Paul Mackerras
   6  * Copyright (C) 2002 Martin Pool <mbp@samba.org>
   7  * Copyright (C) 2003, 2004, 2005, 2006 Wayne Davison
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write to the Free Software Foundation, Inc.,
  21  * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
  22  */
  23
  24 #include "rsync.h"
  25
  26 extern int verbose;
  27 extern int dry_run;
  28 extern int do_xfers;
  29 extern int stdout_format_has_i;
  30 extern int logfile_format_has_i;
  31 extern int am_root;
  32 extern int am_server;
  33 extern int am_daemon;
  34 extern int do_progress;
  35 extern int relative_paths;
  36 extern int implied_dirs;
  37 extern int keep_dirlinks;
  38 extern int preserve_links;
  39 extern int preserve_devices;
  40 extern int preserve_specials;
  41 extern int preserve_hard_links;
  42 extern int preserve_perms;
  43 extern int preserve_uid;
  44 extern int preserve_gid;
  45 extern int preserve_times;
  46 extern int omit_dir_times;
  47 extern int delete_mode;
  48 extern int delete_before;
  49 extern int delete_during;
  50 extern int delete_after;
  51 extern int module_id;
  52 extern int ignore_errors;
  53 extern int remove_source_files;
  54 extern int delay_updates;
  55 extern int update_only;
  56 extern int ignore_existing;
  57 extern int ignore_non_existing;
  58 extern int inplace;
  59 extern int append_mode;
  60 extern int make_backups;
  61 extern int csum_length;
  62 extern int ignore_times;
  63 extern int size_only;
  64 extern OFF_T max_size;
  65 extern OFF_T min_size;
  66 extern int io_error;
  67 extern int allowed_lull;
  68 extern int sock_f_out;
  69 extern int ignore_timeout;
  70 extern int protocol_version;
  71 extern int fuzzy_basis;
  72 extern int always_checksum;
  73 extern int checksum_len;
  74 extern char *partial_dir;
  75 extern char *basis_dir[];
  76 extern int compare_dest;
  77 extern int copy_dest;
  78 extern int link_dest;
  79 extern int whole_file;
  80 extern int list_only;
  81 extern int new_root_dir;
  82 extern int read_batch;
  83 extern int safe_symlinks;
  84 extern long block_size; /* "long" because popt can't set an int32. */
  85 extern int max_delete;
  86 extern int force_delete;
  87 extern int one_file_system;
  88 extern struct stats stats;
  89 extern dev_t filesystem_dev;
  90 extern char *backup_dir;
  91 extern char *backup_suffix;
  92 extern int backup_suffix_len;
  93 extern struct file_list *the_file_list;
  94 extern struct filter_list_struct server_filter_list;
  95
  96 static int deletion_count = 0; /* used to implement --max-delete */
  97
  98 /* For calling delete_item() */
  99 #define DEL_RECURSE             (1<<1) /* recurse */
 100
 101 enum nonregtype {
 102     TYPE_DIR, TYPE_SPECIAL, TYPE_DEVICE, TYPE_SYMLINK
 103 };
 104
 105 enum delret {
 106     DR_SUCCESS = 0, DR_FAILURE, DR_AT_LIMIT, DR_PINNED, DR_NOT_EMPTY
 107 };
 108
 109 /* Forward declaration for delete_item(). */
 110 static enum delret delete_dir_contents(char *fname, int flags);
 111
 112
 113 static int is_backup_file(char *fn)
 114 {
 115         int k = strlen(fn) - backup_suffix_len;
 116         return k > 0 && strcmp(fn+k, backup_suffix) == 0;
 117 }
 118
 119 /* Delete a file or directory.  If DEL_RECURSE is set in the flags, this will
 120  * delete recursively.
 121  *
 122  * Note that fname must point to a MAXPATHLEN buffer if the mode indicates it's
 123  * a directory! (The buffer is used for recursion, but returned unchanged.)
 124  */
 125 static enum delret delete_item(char *fname, int mode, char *replace, int flags)
 126 {
 127         enum delret ret;
 128         char *what;
 129         int ok;
 130
 131         if (verbose > 2) {
 132                 rprintf(FINFO, "delete_item(%s) mode=%o flags=%d\n",
 133                         fname, mode, flags);
 134         }
 135
 136         if (S_ISDIR(mode) && flags & DEL_RECURSE) {
 137                 ret = delete_dir_contents(fname, flags);
 138                 if (ret == DR_PINNED || ret == DR_NOT_EMPTY
 139                  || ret == DR_AT_LIMIT)
 140                         goto check_ret;
 141                 /* OK: try to delete the directory. */
 142         }
 143
 144         if (!replace && max_delete >= 0 && ++deletion_count > max_delete)
 145                 return DR_AT_LIMIT;
 146
 147         if (S_ISDIR(mode)) {
 148                 what = "rmdir";
 149                 ok = do_rmdir(fname) == 0;
 150         } else if (make_backups && (backup_dir || !is_backup_file(fname))) {
 151                 what = "make_backup";
 152                 ok = make_backup(fname);
 153         } else {
 154                 what = "unlink";
 155                 ok = robust_unlink(fname) == 0;
 156         }
 157
 158         if (ok) {
 159                 if (!replace)
 160                         log_delete(fname, mode);
 161                 ret = DR_SUCCESS;
 162         } else {
 163                 if (S_ISDIR(mode) && errno == ENOTEMPTY) {
 164                         rprintf(FINFO, "non-empty directory, %s, not deleted\n",
 165                                 fname);
 166                         ret = DR_NOT_EMPTY;
 167                 } else if (errno != ENOENT) {
 168                         rsyserr(FERROR, errno, "delete_file: %s(%s) failed",
 169                                 what, full_fname(fname));
 170                         ret = DR_FAILURE;
 171                 } else {
 172                         deletion_count--;
 173                         ret = DR_SUCCESS;
 174                 }
 175         }
 176
 177   check_ret:
 178         if (replace && ret != DR_SUCCESS) {
 179                 rprintf(FERROR, "could not make way for new %s: %s\n",
 180                         replace, fname);
 181         }
 182         return ret;
 183 }
 184
 185 /* Prep directory is to be deleted, so delete all its contents.  Note
 186  * that fname must point to a MAXPATHLEN buffer!  (The buffer is used
 187  * for recursion, but returned unchanged.)
 188  */
 189 static enum delret delete_dir_contents(char *fname, int flags)
 190 {
 191         struct file_list *dirlist;
 192         enum delret ret, result;
 193         unsigned remainder;
 194         void *save_filters;
 195         int j, dlen;
 196         char *p;
 197
 198         dlen = strlen(fname);
 199         save_filters = push_local_filters(fname, dlen);
 200
 201         dirlist = get_dirlist(fname, dlen, 0);
 202
 203         p = fname + dlen;
 204         if (dlen != 1 || *fname != '/')
 205                 *p++ = '/';
 206         remainder = MAXPATHLEN - (p - fname);
 207
 208         ret = DR_SUCCESS;
 209
 210         for (j = dirlist->count; j--; ) {
 211                 struct file_struct *fp = dirlist->files[j];
 212
 213                 if (fp->flags & FLAG_MOUNT_POINT) {
 214                         if (verbose > 1) {
 215                                 rprintf(FINFO,
 216                                     "mount point, %s, pins parent directory\n",
 217                                     f_name(fp, NULL));
 218                         }
 219                         ret = DR_PINNED;
 220                         continue;
 221                 }
 222
 223                 strlcpy(p, fp->basename, remainder);
 224                 result = delete_item(fname, fp->mode, NULL, flags);
 225                 if (result != DR_SUCCESS && ret == DR_SUCCESS)
 226                         ret = result == DR_PINNED ? result : DR_NOT_EMPTY;
 227         }
 228
 229         fname[dlen] = '\0';
 230
 231         pop_local_filters(save_filters);
 232         flist_free(dirlist);
 233
 234         return ret;
 235 }
 236
 237
 238 /* This function is used to implement per-directory deletion, and is used by
 239  * all the --delete-WHEN options.  Note that the fbuf pointer must point to a
 240  * MAXPATHLEN buffer with the name of the directory in it (the functions we
 241  * call will append names onto the end, but the old dir value will be restored
 242  * on exit). */
 243 static void delete_in_dir(struct file_list *flist, char *fbuf,
 244                           struct file_struct *file, STRUCT_STAT *stp)
 245 {
 246         static int min_depth = MAXPATHLEN, cur_depth = -1;
 247         static void *filt_array[MAXPATHLEN/2+1];
 248         static int already_warned = 0;
 249         struct file_list *dirlist;
 250         char delbuf[MAXPATHLEN];
 251         int dlen, i;
 252
 253         if (!flist) {
 254                 while (cur_depth >= min_depth)
 255                         pop_local_filters(filt_array[cur_depth--]);
 256                 min_depth = MAXPATHLEN;
 257                 cur_depth = -1;
 258                 return;
 259         }
 260
 261         if (verbose > 2)
 262                 rprintf(FINFO, "delete_in_dir(%s)\n", fbuf);
 263
 264         if (allowed_lull)
 265                 maybe_send_keepalive();
 266
 267         if (file->dir.depth >= MAXPATHLEN/2+1)
 268                 return; /* Impossible... */
 269
 270         if (io_error && !(lp_ignore_errors(module_id) || ignore_errors)) {
 271                 if (already_warned)
 272                         return;
 273                 rprintf(FINFO,
 274                         "IO error encountered -- skipping file deletion\n");
 275                 already_warned = 1;
 276                 return;
 277         }
 278
 279         while (cur_depth >= file->dir.depth && cur_depth >= min_depth)
 280                 pop_local_filters(filt_array[cur_depth--]);
 281         cur_depth = file->dir.depth;
 282         if (min_depth > cur_depth)
 283                 min_depth = cur_depth;
 284         dlen = strlen(fbuf);
 285         filt_array[cur_depth] = push_local_filters(fbuf, dlen);
 286
 287         if (one_file_system) {
 288                 if (file->flags & FLAG_TOP_DIR)
 289                         filesystem_dev = stp->st_dev;
 290                 else if (filesystem_dev != stp->st_dev)
 291                         return;
 292         }
 293
 294         dirlist = get_dirlist(fbuf, dlen, 0);
 295
 296         /* If an item in dirlist is not found in flist, delete it
 297          * from the filesystem. */
 298         for (i = dirlist->count; i--; ) {
 299                 struct file_struct *fp = dirlist->files[i];
 300                 if (!fp->basename)
 301                         continue;
 302                 if (fp->flags & FLAG_MOUNT_POINT) {
 303                         if (verbose > 1)
 304                                 rprintf(FINFO, "mount point %s not deleted\n",
 305                                         f_name(fp, NULL));
 306                         continue;
 307                 }
 308                 if (flist_find(flist, fp) < 0) {
 309                         f_name(fp, delbuf);
 310                         delete_item(delbuf, fp->mode, NULL, DEL_RECURSE);
 311                 }
 312         }
 313
 314         flist_free(dirlist);
 315 }
 316
 317 /* This deletes any files on the receiving side that are not present on the
 318  * sending side.  This is used by --delete-before and --delete-after. */
 319 static void do_delete_pass(struct file_list *flist)
 320 {
 321         char fbuf[MAXPATHLEN];
 322         STRUCT_STAT st;
 323         int j;
 324
 325         /* dry_run is incremented when the destination doesn't exist yet. */
 326         if (dry_run > 1 || list_only)
 327                 return;
 328
 329         for (j = 0; j < flist->count; j++) {
 330                 struct file_struct *file = flist->files[j];
 331
 332                 if (!(file->flags & FLAG_DEL_HERE))
 333                         continue;
 334
 335                 f_name(file, fbuf);
 336                 if (verbose > 1 && file->flags & FLAG_TOP_DIR)
 337                         rprintf(FINFO, "deleting in %s\n", fbuf);
 338
 339                 if (link_stat(fbuf, &st, keep_dirlinks) < 0
 340                  || !S_ISDIR(st.st_mode))
 341                         continue;
 342
 343                 delete_in_dir(flist, fbuf, file, &st);
 344         }
 345         delete_in_dir(NULL, NULL, NULL, NULL);
 346
 347         if (do_progress && !am_server)
 348                 rprintf(FINFO, "                    \r");
 349 }
 350
 351 int unchanged_attrs(struct file_struct *file, STRUCT_STAT *st)
 352 {
 353         if (preserve_perms
 354          && (st->st_mode & CHMOD_BITS) != (file->mode & CHMOD_BITS))
 355                 return 0;
 356
 357         if (am_root && preserve_uid && st->st_uid != file->uid)
 358                 return 0;
 359
 360         if (preserve_gid && file->gid != GID_NONE && st->st_gid != file->gid)
 361                 return 0;
 362
 363         return 1;
 364 }
 365
 366 void itemize(struct file_struct *file, int ndx, int statret, STRUCT_STAT *st,
 367              int32 iflags, uchar fnamecmp_type, char *xname)
 368 {
 369         if (statret >= 0) { /* A from-dest-dir statret can == 1! */
 370                 int keep_time = !preserve_times ? 0
 371                     : S_ISDIR(file->mode) ? !omit_dir_times
 372                     : !S_ISLNK(file->mode);
 373
 374                 if (S_ISREG(file->mode) && file->length != st->st_size)
 375                         iflags |= ITEM_REPORT_SIZE;
 376                 if ((iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !keep_time
 377                   && !(iflags & ITEM_MATCHED)
 378                   && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
 379                  || (keep_time && cmp_time(file->modtime, st->st_mtime) != 0))
 380                         iflags |= ITEM_REPORT_TIME;
 381                 if ((file->mode & CHMOD_BITS) != (st->st_mode & CHMOD_BITS))
 382                         iflags |= ITEM_REPORT_PERMS;
 383                 if (preserve_uid && am_root && file->uid != st->st_uid)
 384                         iflags |= ITEM_REPORT_OWNER;
 385                 if (preserve_gid && file->gid != GID_NONE
 386                     && st->st_gid != file->gid)
 387                         iflags |= ITEM_REPORT_GROUP;
 388         } else
 389                 iflags |= ITEM_IS_NEW;
 390
 391         iflags &= 0xffff;
 392         if ((iflags & SIGNIFICANT_ITEM_FLAGS || verbose > 1
 393           || stdout_format_has_i > 1 || (xname && *xname)) && !read_batch) {
 394                 if (protocol_version >= 29) {
 395                         if (ndx >= 0)
 396                                 write_int(sock_f_out, ndx);
 397                         write_shortint(sock_f_out, iflags);
 398                         if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
 399                                 write_byte(sock_f_out, fnamecmp_type);
 400                         if (iflags & ITEM_XNAME_FOLLOWS)
 401                                 write_vstring(sock_f_out, xname, strlen(xname));
 402                 } else if (ndx >= 0) {
 403                         enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
 404                         log_item(code, file, &stats, iflags, xname);
 405                 }
 406         }
 407 }
 408
 409
 410 /* Perform our quick-check heuristic for determining if a file is unchanged. */
 411 int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
 412 {
 413         if (st->st_size != file->length)
 414                 return 0;
 415
 416         /* if always checksum is set then we use the checksum instead
 417            of the file time to determine whether to sync */
 418         if (always_checksum && S_ISREG(st->st_mode)) {
 419                 char sum[MD4_SUM_LENGTH];
 420                 file_checksum(fn, sum, st->st_size);
 421                 return memcmp(sum, file->u.sum, checksum_len) == 0;
 422         }
 423
 424         if (size_only)
 425                 return 1;
 426
 427         if (ignore_times)
 428                 return 0;
 429
 430         return cmp_time(st->st_mtime, file->modtime) == 0;
 431 }
 432
 433
 434 /*
 435  * set (initialize) the size entries in the per-file sum_struct
 436  * calculating dynamic block and checksum sizes.
 437  *
 438  * This is only called from generate_and_send_sums() but is a separate
 439  * function to encapsulate the logic.
 440  *
 441  * The block size is a rounded square root of file length.
 442  *
 443  * The checksum size is determined according to:
 444  *     blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
 445  * provided by Donovan Baarda which gives a probability of rsync
 446  * algorithm corrupting data and falling back using the whole md4
 447  * checksums.
 448  *
 449  * This might be made one of several selectable heuristics.
 450  */
 451 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
 452 {
 453         int32 blength;
 454         int s2length;
 455
 456         if (block_size)
 457                 blength = block_size;
 458         else if (len <= BLOCK_SIZE * BLOCK_SIZE)
 459                 blength = BLOCK_SIZE;
 460         else {
 461                 int32 c;
 462                 int64 l;
 463                 int cnt;
 464                 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
 465                 if (cnt >= 31 || c >= MAX_BLOCK_SIZE)
 466                         blength = MAX_BLOCK_SIZE;
 467                 else {
 468                     blength = 0;
 469                     do {
 470                             blength |= c;
 471                             if (len < (int64)blength * blength)
 472                                     blength &= ~c;
 473                             c >>= 1;
 474                     } while (c >= 8);   /* round to multiple of 8 */
 475                     blength = MAX(blength, BLOCK_SIZE);
 476                 }
 477         }
 478
 479         if (protocol_version < 27) {
 480                 s2length = csum_length;
 481         } else if (csum_length == SUM_LENGTH) {
 482                 s2length = SUM_LENGTH;
 483         } else {
 484                 int32 c;
 485                 int64 l;
 486                 int b = BLOCKSUM_BIAS;
 487                 for (l = len; l >>= 1; b += 2) {}
 488                 for (c = blength; (c >>= 1) && b; b--) {}
 489                 /* add a bit, subtract rollsum, round up. */
 490                 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
 491                 s2length = MAX(s2length, csum_length);
 492                 s2length = MIN(s2length, SUM_LENGTH);
 493         }
 494
 495         sum->flength    = len;
 496         sum->blength    = blength;
 497         sum->s2length   = s2length;
 498         sum->remainder  = len % blength;
 499         sum->count      = len / blength + (sum->remainder != 0);
 500
 501         if (sum->count && verbose > 2) {
 502                 rprintf(FINFO,
 503                         "count=%.0f rem=%ld blength=%ld s2length=%d flength=%.0f\n",
 504                         (double)sum->count, (long)sum->remainder, (long)sum->blength,
 505                         sum->s2length, (double)sum->flength);
 506         }
 507 }
 508
 509
 510 /*
 511  * Generate and send a stream of signatures/checksums that describe a buffer
 512  *
 513  * Generate approximately one checksum every block_len bytes.
 514  */
 515 static void generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
 516 {
 517         int32 i;
 518         struct map_struct *mapbuf;
 519         struct sum_struct sum;
 520         OFF_T offset = 0;
 521
 522         sum_sizes_sqroot(&sum, len);
 523         write_sum_head(f_out, &sum);
 524
 525         if (append_mode > 0 && f_copy < 0)
 526                 return;
 527
 528         if (len > 0)
 529                 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
 530         else
 531                 mapbuf = NULL;
 532
 533         for (i = 0; i < sum.count; i++) {
 534                 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
 535                 char *map = map_ptr(mapbuf, offset, n1);
 536                 char sum2[SUM_LENGTH];
 537                 uint32 sum1;
 538
 539                 len -= n1;
 540                 offset += n1;
 541
 542                 if (f_copy >= 0) {
 543                         full_write(f_copy, map, n1);
 544                         if (append_mode > 0)
 545                                 continue;
 546                 }
 547
 548                 sum1 = get_checksum1(map, n1);
 549                 get_checksum2(map, n1, sum2);
 550
 551                 if (verbose > 3) {
 552                         rprintf(FINFO,
 553                                 "chunk[%.0f] offset=%.0f len=%ld sum1=%08lx\n",
 554                                 (double)i, (double)offset - n1, (long)n1,
 555                                 (unsigned long)sum1);
 556                 }
 557                 write_int(f_out, sum1);
 558                 write_buf(f_out, sum2, sum.s2length);
 559         }
 560
 561         if (mapbuf)
 562                 unmap_file(mapbuf);
 563 }
 564
 565
 566 /* Try to find a filename in the same dir as "fname" with a similar name. */
 567 static int find_fuzzy(struct file_struct *file, struct file_list *dirlist)
 568 {
 569         int fname_len, fname_suf_len;
 570         const char *fname_suf, *fname = file->basename;
 571         uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
 572         int j, lowest_j = -1;
 573
 574         fname_len = strlen(fname);
 575         fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
 576
 577         for (j = 0; j < dirlist->count; j++) {
 578                 struct file_struct *fp = dirlist->files[j];
 579                 const char *suf, *name;
 580                 int len, suf_len;
 581                 uint32 dist;
 582
 583                 if (!S_ISREG(fp->mode) || !fp->length
 584                     || fp->flags & FLAG_NO_FUZZY)
 585                         continue;
 586
 587                 name = fp->basename;
 588
 589                 if (fp->length == file->length
 590                     && cmp_time(fp->modtime, file->modtime) == 0) {
 591                         if (verbose > 4) {
 592                                 rprintf(FINFO,
 593                                         "fuzzy size/modtime match for %s\n",
 594                                         name);
 595                         }
 596                         return j;
 597                 }
 598
 599                 len = strlen(name);
 600                 suf = find_filename_suffix(name, len, &suf_len);
 601
 602                 dist = fuzzy_distance(name, len, fname, fname_len);
 603                 /* Add some extra weight to how well the suffixes match. */
 604                 dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len)
 605                       * 10;
 606                 if (verbose > 4) {
 607                         rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
 608                                 name, (int)(dist>>16), (int)(dist&0xFFFF));
 609                 }
 610                 if (dist <= lowest_dist) {
 611                         lowest_dist = dist;
 612                         lowest_j = j;
 613                 }
 614         }
 615
 616         return lowest_j;
 617 }
 618
 619 void check_for_finished_hlinks(int itemizing, enum logcode code)
 620 {
 621         struct file_struct *file;
 622         int ndx;
 623
 624         while ((ndx = get_hlink_num()) != -1) {
 625                 if (ndx < 0 || ndx >= the_file_list->count)
 626                         continue;
 627
 628                 file = the_file_list->files[ndx];
 629                 if (!file->link_u.links)
 630                         continue;
 631
 632                 hard_link_cluster(file, ndx, itemizing, code);
 633         }
 634 }
 635
 636 /* This is only called for regular files.  We return -2 if we've finished
 637  * handling the file, -1 if no dest-linking occurred, or a non-negative
 638  * value if we found an alternate basis file. */
 639 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
 640                          char *cmpbuf, STRUCT_STAT *stp, int itemizing,
 641                          int maybe_ATTRS_REPORT, enum logcode code)
 642 {
 643         int best_match = -1;
 644         int match_level = 0;
 645         int j = 0;
 646
 647         do {
 648                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 649                 if (link_stat(cmpbuf, stp, 0) < 0 || !S_ISREG(stp->st_mode))
 650                         continue;
 651                 switch (match_level) {
 652                 case 0:
 653                         best_match = j;
 654                         match_level = 1;
 655                         /* FALL THROUGH */
 656                 case 1:
 657                         if (!unchanged_file(cmpbuf, file, stp))
 658                                 continue;
 659                         best_match = j;
 660                         match_level = 2;
 661                         /* FALL THROUGH */
 662                 case 2:
 663                         if (!unchanged_attrs(file, stp))
 664                                 continue;
 665                         if (always_checksum && preserve_times
 666                          && cmp_time(stp->st_mtime, file->modtime))
 667                                 continue;
 668                         best_match = j;
 669                         match_level = 3;
 670                         break;
 671                 }
 672                 break;
 673         } while (basis_dir[++j] != NULL);
 674
 675         if (!match_level)
 676                 return -1;
 677
 678         if (j != best_match) {
 679                 j = best_match;
 680                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 681                 if (link_stat(cmpbuf, stp, 0) < 0)
 682                         return -1;
 683         }
 684
 685         if (match_level == 3 && !copy_dest) {
 686 #ifdef SUPPORT_HARD_LINKS
 687                 if (link_dest) {
 688                         int i = itemizing && (verbose > 1 || stdout_format_has_i > 1);
 689                         if (hard_link_one(file, ndx, fname, 0, stp,
 690                                           cmpbuf, 1, i, code) < 0)
 691                                 goto try_a_copy;
 692                         if (preserve_hard_links && file->link_u.links) {
 693                                 if (dry_run)
 694                                         file->link_u.links->link_dest_used = j + 1;
 695                                 hard_link_cluster(file, ndx, itemizing, code);
 696                         }
 697                 } else
 698 #endif
 699                 if (itemizing)
 700                         itemize(file, ndx, 0, stp, 0, 0, NULL);
 701                 if (verbose > 1 && maybe_ATTRS_REPORT) {
 702                         rprintf(FCLIENT, "%s is uptodate\n", fname);
 703                 }
 704                 return -2;
 705         }
 706
 707         if (match_level >= 2) {
 708           try_a_copy: /* Copy the file locally. */
 709                 if (copy_file(cmpbuf, fname, file->mode) < 0) {
 710                         if (verbose) {
 711                                 rsyserr(FINFO, errno, "copy_file %s => %s",
 712                                         full_fname(cmpbuf), fname);
 713                         }
 714                         return -1;
 715                 }
 716                 if (itemizing)
 717                         itemize(file, ndx, 0, stp, ITEM_LOCAL_CHANGE, 0, NULL);
 718                 set_file_attrs(fname, file, NULL, 0);
 719                 if (maybe_ATTRS_REPORT
 720                  && ((!itemizing && verbose && match_level == 2)
 721                   || (verbose > 1 && match_level == 3))) {
 722                         code = match_level == 3 ? FCLIENT : FINFO;
 723                         rprintf(code, "%s%s\n", fname,
 724                                 match_level == 3 ? " is uptodate" : "");
 725                 }
 726                 if (preserve_hard_links && file->link_u.links)
 727                         hard_link_cluster(file, ndx, itemizing, code);
 728                 return -2;
 729         }
 730
 731         return FNAMECMP_BASIS_DIR_LOW + j;
 732 }
 733
 734 /* This is only called for non-regular files.  We return -2 if we've finished
 735  * handling the file, or -1 if no dest-linking occurred, or a non-negative
 736  * value if we found an alternate basis file. */
 737 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
 738                          char *cmpbuf, STRUCT_STAT *stp, int itemizing,
 739                          int maybe_ATTRS_REPORT, enum logcode code)
 740 {
 741         char lnk[MAXPATHLEN];
 742         int best_match = -1;
 743         int match_level = 0;
 744         enum nonregtype type;
 745         int len, j = 0;
 746
 747 #ifndef SUPPORT_LINKS
 748         if (S_ISLNK(file->mode))
 749                 return -1;
 750 #endif
 751         if (S_ISDIR(file->mode)) {
 752                 type = TYPE_DIR;
 753         } else if (IS_SPECIAL(file->mode))
 754                 type = TYPE_SPECIAL;
 755         else if (IS_DEVICE(file->mode))
 756                 type = TYPE_DEVICE;
 757 #ifdef SUPPORT_LINKS
 758         else if (S_ISLNK(file->mode))
 759                 type = TYPE_SYMLINK;
 760 #endif
 761         else {
 762                 rprintf(FERROR,
 763                         "internal: try_dests_non() called with invalid mode (%o)\n",
 764                         (int)file->mode);
 765                 exit_cleanup(RERR_UNSUPPORTED);
 766         }
 767
 768         do {
 769                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 770                 if (link_stat(cmpbuf, stp, 0) < 0)
 771                         continue;
 772                 switch (type) {
 773                 case TYPE_DIR:
 774                         if (!S_ISDIR(stp->st_mode))
 775                                 continue;
 776                         break;
 777                 case TYPE_SPECIAL:
 778                         if (!IS_SPECIAL(stp->st_mode))
 779                                 continue;
 780                         break;
 781                 case TYPE_DEVICE:
 782                         if (!IS_DEVICE(stp->st_mode))
 783                                 continue;
 784                         break;
 785 #ifdef SUPPORT_LINKS
 786                 case TYPE_SYMLINK:
 787                         if (!S_ISLNK(stp->st_mode))
 788                                 continue;
 789                         break;
 790 #endif
 791                 }
 792                 if (match_level < 1) {
 793                         match_level = 1;
 794                         best_match = j;
 795                 }
 796                 switch (type) {
 797                 case TYPE_DIR:
 798                         break;
 799                 case TYPE_SPECIAL:
 800                 case TYPE_DEVICE:
 801                         if (stp->st_rdev != file->u.rdev)
 802                                 continue;
 803                         break;
 804 #ifdef SUPPORT_LINKS
 805                 case TYPE_SYMLINK:
 806                         if ((len = readlink(cmpbuf, lnk, MAXPATHLEN-1)) <= 0)
 807                                 continue;
 808                         lnk[len] = '\0';
 809                         if (strcmp(lnk, file->u.link) != 0)
 810                                 continue;
 811                         break;
 812 #endif
 813                 }
 814                 if (match_level < 2) {
 815                         match_level = 2;
 816                         best_match = j;
 817                 }
 818                 if (unchanged_attrs(file, stp)) {
 819                         match_level = 3;
 820                         best_match = j;
 821                         break;
 822                 }
 823         } while (basis_dir[++j] != NULL);
 824
 825         if (!match_level)
 826                 return -1;
 827
 828         if (j != best_match) {
 829                 j = best_match;
 830                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 831                 if (link_stat(cmpbuf, stp, 0) < 0)
 832                         return -1;
 833         }
 834
 835         if (match_level == 3) {
 836 #ifdef SUPPORT_HARD_LINKS
 837                 if (link_dest
 838 #ifndef CAN_HARDLINK_SYMLINK
 839                  && !S_ISLNK(file->mode)
 840 #endif
 841 #ifndef CAN_HARDLINK_SPECIAL
 842                  && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
 843 #endif
 844                  && !S_ISDIR(file->mode)) {
 845                         if (do_link(cmpbuf, fname) < 0) {
 846                                 rsyserr(FERROR, errno,
 847                                         "failed to hard-link %s with %s",
 848                                         cmpbuf, fname);
 849                                 return j;
 850                         }
 851                         if (preserve_hard_links && file->link_u.links)
 852                                 hard_link_cluster(file, ndx, itemizing, code);
 853                 } else
 854 #endif
 855                         match_level = 2;
 856                 if (itemizing && stdout_format_has_i
 857                  && (verbose > 1 || stdout_format_has_i > 1)) {
 858                         int chg = compare_dest && type != TYPE_DIR ? 0
 859                             : ITEM_LOCAL_CHANGE
 860                              + (match_level == 3 ? ITEM_XNAME_FOLLOWS : 0);
 861                         char *lp = match_level == 3 ? "" : NULL;
 862                         itemize(file, ndx, 0, stp, chg + ITEM_MATCHED, 0, lp);
 863                 }
 864                 if (verbose > 1 && maybe_ATTRS_REPORT) {
 865                         rprintf(FCLIENT, "%s%s is uptodate\n",
 866                                 fname, type == TYPE_DIR ? "/" : "");
 867                 }
 868                 return -2;
 869         }
 870
 871         return j;
 872 }
 873
 874 static int phase = 0;
 875
 876 /* Acts on the_file_list->file's ndx'th item, whose name is fname.  If a dir,
 877  * make sure it exists, and has the right permissions/timestamp info.  For
 878  * all other non-regular files (symlinks, etc.) we create them here.  For
 879  * regular files that have changed, we try to find a basis file and then
 880  * start sending checksums.
 881  *
 882  * When fname is non-null, it must point to a MAXPATHLEN buffer!
 883  *
 884  * Note that f_out is set to -1 when doing final directory-permission and
 885  * modification-time repair. */
 886 static void recv_generator(char *fname, struct file_struct *file, int ndx,
 887                            int itemizing, int maybe_ATTRS_REPORT,
 888                            enum logcode code, int f_out)
 889 {
 890         static int missing_below = -1, excluded_below = -1;
 891         static char *parent_dirname = "";
 892         static struct file_list *fuzzy_dirlist = NULL;
 893         static int need_fuzzy_dirlist = 0;
 894         struct file_struct *fuzzy_file = NULL;
 895         int fd = -1, f_copy = -1;
 896         STRUCT_STAT st, real_st, partial_st;
 897         struct file_struct *back_file = NULL;
 898         int statret, real_ret, stat_errno;
 899         char *fnamecmp, *partialptr, *backupptr = NULL;
 900         char fnamecmpbuf[MAXPATHLEN];
 901         uchar fnamecmp_type;
 902         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
 903
 904         if (list_only)
 905                 return;
 906
 907         if (!fname) {
 908                 if (fuzzy_dirlist) {
 909                         flist_free(fuzzy_dirlist);
 910                         fuzzy_dirlist = NULL;
 911                 }
 912                 if (missing_below >= 0) {
 913                         if (dry_run)
 914                                 dry_run--;
 915                         missing_below = -1;
 916                 }
 917                 parent_dirname = "";
 918                 return;
 919         }
 920
 921         if (verbose > 2)
 922                 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
 923
 924         if (server_filter_list.head) {
 925                 if (excluded_below >= 0) {
 926                         if (file->dir.depth > excluded_below)
 927                                 goto skipping;
 928                         excluded_below = -1;
 929                 }
 930                 if (check_filter(&server_filter_list, fname,
 931                                  S_ISDIR(file->mode)) < 0) {
 932                         if (S_ISDIR(file->mode))
 933                                 excluded_below = file->dir.depth;
 934                   skipping:
 935                         if (verbose) {
 936                                 rprintf(FINFO,
 937                                         "skipping server-excluded file \"%s\"\n",
 938                                         fname);
 939                         }
 940                         return;
 941                 }
 942         }
 943
 944         if (missing_below >= 0) {
 945                 if (file->dir.depth <= missing_below) {
 946                         if (dry_run)
 947                                 dry_run--;
 948                         missing_below = -1;
 949                 } else if (!dry_run)
 950                         return;
 951         }
 952         if (dry_run > 1) {
 953                 statret = -1;
 954                 stat_errno = ENOENT;
 955         } else {
 956                 char *dn = file->dirname ? file->dirname : ".";
 957                 if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
 958                         if (relative_paths && !implied_dirs
 959                          && do_stat(dn, &st) < 0
 960                          && create_directory_path(fname) < 0) {
 961                                 rsyserr(FERROR, errno,
 962                                         "recv_generator: mkdir %s failed",
 963                                         full_fname(dn));
 964                         }
 965                         if (fuzzy_dirlist) {
 966                                 flist_free(fuzzy_dirlist);
 967                                 fuzzy_dirlist = NULL;
 968                         }
 969                         if (fuzzy_basis)
 970                                 need_fuzzy_dirlist = 1;
 971                 }
 972                 parent_dirname = dn;
 973
 974                 if (need_fuzzy_dirlist && S_ISREG(file->mode)) {
 975                         fuzzy_dirlist = get_dirlist(dn, -1, 1);
 976                         need_fuzzy_dirlist = 0;
 977                 }
 978
 979                 statret = link_stat(fname, &st,
 980                                     keep_dirlinks && S_ISDIR(file->mode));
 981                 stat_errno = errno;
 982         }
 983
 984         if (ignore_non_existing && statret == -1 && stat_errno == ENOENT) {
 985                 if (verbose > 1) {
 986                         rprintf(FINFO, "not creating new %s \"%s\"\n",
 987                                 S_ISDIR(file->mode) ? "directory" : "file",
 988                                 fname);
 989                 }
 990                 return;
 991         }
 992
 993         /* If we're not preserving permissions, change the file-list's
 994          * mode based on the local permissions and some heuristics. */
 995         if (!preserve_perms) {
 996                 int exists = statret == 0
 997                           && S_ISDIR(st.st_mode) == S_ISDIR(file->mode);
 998                 file->mode = dest_mode(file->mode, st.st_mode, exists);
 999         }
1000
1001         if (S_ISDIR(file->mode)) {
1002                 /* The file to be received is a directory, so we need
1003                  * to prepare appropriately.  If there is already a
1004                  * file of that name and it is *not* a directory, then
1005                  * we need to delete it.  If it doesn't exist, then
1006                  * (perhaps recursively) create it. */
1007                 if (statret == 0 && !S_ISDIR(st.st_mode)) {
1008                         if (delete_item(fname, st.st_mode, "directory", del_opts) != 0)
1009                                 return;
1010                         statret = -1;
1011                 }
1012                 if (dry_run && statret != 0 && missing_below < 0) {
1013                         missing_below = file->dir.depth;
1014                         dry_run++;
1015                 }
1016                 real_ret = statret;
1017                 real_st = st;
1018                 if (new_root_dir) {
1019                         if (*fname == '.' && fname[1] == '\0')
1020                                 statret = -1;
1021                         new_root_dir = 0;
1022                 }
1023                 if (statret != 0 && basis_dir[0] != NULL) {
1024                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &st,
1025                                               itemizing, maybe_ATTRS_REPORT, code);
1026                         if (j == -2) {
1027                                 itemizing = 0;
1028                                 code = FNONE;
1029                         } else if (j >= 0)
1030                                 statret = 1;
1031                 }
1032                 if (itemizing && f_out != -1) {
1033                         itemize(file, ndx, statret, &st,
1034                                 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
1035                 }
1036                 if (real_ret != 0 && do_mkdir(fname,file->mode) < 0 && errno != EEXIST) {
1037                         if (!relative_paths || errno != ENOENT
1038                             || create_directory_path(fname) < 0
1039                             || (do_mkdir(fname, file->mode) < 0 && errno != EEXIST)) {
1040                                 rsyserr(FERROR, errno,
1041                                         "recv_generator: mkdir %s failed",
1042                                         full_fname(fname));
1043                                 file->flags |= FLAG_MISSING;
1044                                 if (ndx+1 < the_file_list->count
1045                                  && the_file_list->files[ndx+1]->dir.depth > file->dir.depth) {
1046                                         rprintf(FERROR,
1047                                             "*** Skipping everything below this failed directory ***\n");
1048                                         missing_below = file->dir.depth;
1049                                 }
1050                                 return;
1051                         }
1052                 }
1053                 if (set_file_attrs(fname, file, real_ret ? NULL : &real_st, 0)
1054                     && verbose && code != FNONE && f_out != -1)
1055                         rprintf(code, "%s/\n", fname);
1056                 if (real_ret != 0 && one_file_system)
1057                         real_st.st_dev = filesystem_dev;
1058                 if (delete_during && f_out != -1 && !phase && dry_run < 2
1059                     && (file->flags & FLAG_DEL_HERE))
1060                         delete_in_dir(the_file_list, fname, file, &real_st);
1061                 return;
1062         }
1063
1064         if (preserve_hard_links && file->link_u.links
1065             && hard_link_check(file, ndx, fname, statret, &st,
1066                                itemizing, code, HL_CHECK_MASTER))
1067                 return;
1068
1069         if (preserve_links && S_ISLNK(file->mode)) {
1070 #ifdef SUPPORT_LINKS
1071                 if (safe_symlinks && unsafe_symlink(file->u.link, fname)) {
1072                         if (verbose) {
1073                                 if (the_file_list->count == 1)
1074                                         fname = f_name(file, NULL);
1075                                 rprintf(FINFO,
1076                                         "ignoring unsafe symlink %s -> \"%s\"\n",
1077                                         full_fname(fname), file->u.link);
1078                         }
1079                         return;
1080                 }
1081                 if (statret == 0) {
1082                         char lnk[MAXPATHLEN];
1083                         int len;
1084
1085                         if (!S_ISLNK(st.st_mode))
1086                                 statret = -1;
1087                         else if ((len = readlink(fname, lnk, MAXPATHLEN-1)) > 0
1088                               && strncmp(lnk, file->u.link, len) == 0
1089                               && file->u.link[len] == '\0') {
1090                                 /* The link is pointing to the right place. */
1091                                 if (itemizing)
1092                                         itemize(file, ndx, 0, &st, 0, 0, NULL);
1093                                 set_file_attrs(fname, file, &st, maybe_ATTRS_REPORT);
1094                                 if (preserve_hard_links && file->link_u.links)
1095                                         hard_link_cluster(file, ndx, itemizing, code);
1096                                 if (remove_source_files == 1)
1097                                         goto return_with_success;
1098                                 return;
1099                         }
1100                         /* Not the right symlink (or not a symlink), so
1101                          * delete it. */
1102                         if (delete_item(fname, st.st_mode, "symlink", del_opts) != 0)
1103                                 return;
1104                 } else if (basis_dir[0] != NULL) {
1105                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &st,
1106                                               itemizing, maybe_ATTRS_REPORT, code);
1107                         if (j == -2) {
1108 #ifndef CAN_HARDLINK_SYMLINK
1109                                 if (link_dest) {
1110                                         /* Resort to --copy-dest behavior. */
1111                                 } else
1112 #endif
1113                                 if (!copy_dest)
1114                                         return;
1115                                 itemizing = 0;
1116                                 code = FNONE;
1117                         } else if (j >= 0)
1118                                 statret = 1;
1119                 }
1120                 if (preserve_hard_links && file->link_u.links
1121                     && hard_link_check(file, ndx, fname, -1, &st,
1122                                        itemizing, code, HL_SKIP))
1123                         return;
1124                 if (do_symlink(file->u.link, fname) != 0) {
1125                         rsyserr(FERROR, errno, "symlink %s -> \"%s\" failed",
1126                                 full_fname(fname), file->u.link);
1127                 } else {
1128                         set_file_attrs(fname, file, NULL, 0);
1129                         if (itemizing) {
1130                                 itemize(file, ndx, statret, &st,
1131                                         ITEM_LOCAL_CHANGE, 0, NULL);
1132                         }
1133                         if (code != FNONE && verbose)
1134                                 rprintf(code, "%s -> %s\n", fname, file->u.link);
1135                         if (preserve_hard_links && file->link_u.links)
1136                                 hard_link_cluster(file, ndx, itemizing, code);
1137                         /* This does not check remove_source_files == 1
1138                          * because this is one of the items that the old
1139                          * --remove-sent-files option would remove. */
1140                         if (remove_source_files)
1141                                 goto return_with_success;
1142                 }
1143 #endif
1144                 return;
1145         }
1146
1147         if ((am_root && preserve_devices && IS_DEVICE(file->mode))
1148          || (preserve_specials && IS_SPECIAL(file->mode))) {
1149                 if (statret == 0) {
1150                         char *t;
1151                         if (IS_DEVICE(file->mode)) {
1152                                 if (!IS_DEVICE(st.st_mode))
1153                                         statret = -1;
1154                                 t = "device file";
1155                         } else {
1156                                 if (!IS_SPECIAL(st.st_mode))
1157                                         statret = -1;
1158                                 t = "special file";
1159                         }
1160                         if (statret == 0
1161                          && (st.st_mode & ~CHMOD_BITS) == (file->mode & ~CHMOD_BITS)
1162                          && st.st_rdev == file->u.rdev) {
1163                                 /* The device or special file is identical. */
1164                                 if (itemizing)
1165                                         itemize(file, ndx, 0, &st, 0, 0, NULL);
1166                                 set_file_attrs(fname, file, &st, maybe_ATTRS_REPORT);
1167                                 if (preserve_hard_links && file->link_u.links)
1168                                         hard_link_cluster(file, ndx, itemizing, code);
1169                                 if (remove_source_files == 1)
1170                                         goto return_with_success;
1171                                 return;
1172                         }
1173                         if (delete_item(fname, st.st_mode, t, del_opts) != 0)
1174                                 return;
1175                 } else if (basis_dir[0] != NULL) {
1176                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &st,
1177                                               itemizing, maybe_ATTRS_REPORT, code);
1178                         if (j == -2) {
1179 #ifndef CAN_HARDLINK_SPECIAL
1180                                 if (link_dest) {
1181                                         /* Resort to --copy-dest behavior. */
1182                                 } else
1183 #endif
1184                                 if (!copy_dest)
1185                                         return;
1186                                 itemizing = 0;
1187                                 code = FNONE;
1188                         } else if (j >= 0)
1189                                 statret = 1;
1190                 }
1191                 if (preserve_hard_links && file->link_u.links
1192                     && hard_link_check(file, ndx, fname, -1, &st,
1193                                        itemizing, code, HL_SKIP))
1194                         return;
1195                 if (verbose > 2) {
1196                         rprintf(FINFO,"mknod(%s,0%o,0x%x)\n",
1197                                 fname, (int)file->mode, (int)file->u.rdev);
1198                 }
1199                 if (do_mknod(fname, file->mode, file->u.rdev) < 0) {
1200                         rsyserr(FERROR, errno, "mknod %s failed",
1201                                 full_fname(fname));
1202                 } else {
1203                         set_file_attrs(fname, file, NULL, 0);
1204                         if (itemizing) {
1205                                 itemize(file, ndx, statret, &st,
1206                                         ITEM_LOCAL_CHANGE, 0, NULL);
1207                         }
1208                         if (code != FNONE && verbose)
1209                                 rprintf(code, "%s\n", fname);
1210                         if (preserve_hard_links && file->link_u.links)
1211                                 hard_link_cluster(file, ndx, itemizing, code);
1212                         if (remove_source_files == 1)
1213                                 goto return_with_success;
1214                 }
1215                 return;
1216         }
1217
1218         if (!S_ISREG(file->mode)) {
1219                 if (the_file_list->count == 1)
1220                         fname = f_name(file, NULL);
1221                 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1222                 return;
1223         }
1224
1225         if (max_size && file->length > max_size) {
1226                 if (verbose > 1) {
1227                         if (the_file_list->count == 1)
1228                                 fname = f_name(file, NULL);
1229                         rprintf(FINFO, "%s is over max-size\n", fname);
1230                 }
1231                 return;
1232         }
1233         if (min_size && file->length < min_size) {
1234                 if (verbose > 1) {
1235                         if (the_file_list->count == 1)
1236                                 fname = f_name(file, NULL);
1237                         rprintf(FINFO, "%s is under min-size\n", fname);
1238                 }
1239                 return;
1240         }
1241
1242         if (ignore_existing && statret == 0) {
1243                 if (verbose > 1)
1244                         rprintf(FINFO, "%s exists\n", fname);
1245                 return;
1246         }
1247
1248         if (update_only && statret == 0
1249             && cmp_time(st.st_mtime, file->modtime) > 0) {
1250                 if (verbose > 1)
1251                         rprintf(FINFO, "%s is newer\n", fname);
1252                 return;
1253         }
1254
1255         fnamecmp = fname;
1256         fnamecmp_type = FNAMECMP_FNAME;
1257
1258         if (statret == 0 && !S_ISREG(st.st_mode)) {
1259                 if (delete_item(fname, st.st_mode, "regular file", del_opts) != 0)
1260                         return;
1261                 statret = -1;
1262                 stat_errno = ENOENT;
1263         }
1264
1265         if (statret != 0 && basis_dir[0] != NULL) {
1266                 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &st,
1267                                       itemizing, maybe_ATTRS_REPORT, code);
1268                 if (j == -2) {
1269                         if (remove_source_files == 1)
1270                                 goto return_with_success;
1271                         return;
1272                 }
1273                 if (j >= 0) {
1274                         fnamecmp = fnamecmpbuf;
1275                         fnamecmp_type = j;
1276                         statret = 0;
1277                 }
1278         }
1279
1280         real_ret = statret;
1281         real_st = st;
1282
1283         if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1284             && link_stat(partialptr, &partial_st, 0) == 0
1285             && S_ISREG(partial_st.st_mode)) {
1286                 if (statret != 0)
1287                         goto prepare_to_open;
1288         } else
1289                 partialptr = NULL;
1290
1291         if (statret != 0 && fuzzy_dirlist && dry_run <= 1) {
1292                 int j = find_fuzzy(file, fuzzy_dirlist);
1293                 if (j >= 0) {
1294                         fuzzy_file = fuzzy_dirlist->files[j];
1295                         f_name(fuzzy_file, fnamecmpbuf);
1296                         if (verbose > 2) {
1297                                 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1298                                         fname, fnamecmpbuf);
1299                         }
1300                         st.st_size = fuzzy_file->length;
1301                         statret = 0;
1302                         fnamecmp = fnamecmpbuf;
1303                         fnamecmp_type = FNAMECMP_FUZZY;
1304                 }
1305         }
1306
1307         if (statret != 0) {
1308                 if (preserve_hard_links && file->link_u.links
1309                     && hard_link_check(file, ndx, fname, statret, &st,
1310                                        itemizing, code, HL_SKIP))
1311                         return;
1312                 if (stat_errno == ENOENT)
1313                         goto notify_others;
1314                 rsyserr(FERROR, stat_errno, "recv_generator: failed to stat %s",
1315                         full_fname(fname));
1316                 return;
1317         }
1318
1319         if (append_mode && st.st_size > file->length)
1320                 return;
1321
1322         if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1323                 ;
1324         else if (fnamecmp_type == FNAMECMP_FUZZY)
1325                 ;
1326         else if (unchanged_file(fnamecmp, file, &st)) {
1327                 if (partialptr) {
1328                         do_unlink(partialptr);
1329                         handle_partial_dir(partialptr, PDIR_DELETE);
1330                 }
1331                 if (itemizing) {
1332                         itemize(file, ndx, real_ret, &real_st,
1333                                 0, 0, NULL);
1334                 }
1335                 set_file_attrs(fname, file, &st, maybe_ATTRS_REPORT);
1336                 if (preserve_hard_links && file->link_u.links)
1337                         hard_link_cluster(file, ndx, itemizing, code);
1338                 if (remove_source_files != 1)
1339                         return;
1340           return_with_success:
1341                 if (!dry_run) {
1342                         char numbuf[4];
1343                         SIVAL(numbuf, 0, ndx);
1344                         send_msg(MSG_SUCCESS, numbuf, 4);
1345                 }
1346                 return;
1347         }
1348
1349   prepare_to_open:
1350         if (partialptr) {
1351                 st = partial_st;
1352                 fnamecmp = partialptr;
1353                 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1354                 statret = 0;
1355         }
1356
1357         if (!do_xfers || read_batch || whole_file)
1358                 goto notify_others;
1359
1360         if (fuzzy_dirlist) {
1361                 int j = flist_find(fuzzy_dirlist, file);
1362                 if (j >= 0) /* don't use changing file as future fuzzy basis */
1363                         fuzzy_dirlist->files[j]->flags |= FLAG_NO_FUZZY;
1364         }
1365
1366         /* open the file */
1367         fd = do_open(fnamecmp, O_RDONLY, 0);
1368
1369         if (fd == -1) {
1370                 rsyserr(FERROR, errno, "failed to open %s, continuing",
1371                         full_fname(fnamecmp));
1372           pretend_missing:
1373                 /* pretend the file didn't exist */
1374                 if (preserve_hard_links && file->link_u.links
1375                     && hard_link_check(file, ndx, fname, statret, &st,
1376                                        itemizing, code, HL_SKIP))
1377                         return;
1378                 statret = real_ret = -1;
1379                 goto notify_others;
1380         }
1381
1382         if (inplace && make_backups && fnamecmp_type == FNAMECMP_FNAME) {
1383                 if (!(backupptr = get_backup_name(fname))) {
1384                         close(fd);
1385                         return;
1386                 }
1387                 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1388                         close(fd);
1389                         goto pretend_missing;
1390                 }
1391                 if (robust_unlink(backupptr) && errno != ENOENT) {
1392                         rsyserr(FERROR, errno, "unlink %s",
1393                                 full_fname(backupptr));
1394                         free(back_file);
1395                         close(fd);
1396                         return;
1397                 }
1398                 if ((f_copy = do_open(backupptr,
1399                     O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1400                         rsyserr(FERROR, errno, "open %s",
1401                                 full_fname(backupptr));
1402                         free(back_file);
1403                         close(fd);
1404                         return;
1405                 }
1406                 fnamecmp_type = FNAMECMP_BACKUP;
1407         }
1408
1409         if (verbose > 3) {
1410                 rprintf(FINFO, "gen mapped %s of size %.0f\n",
1411                         fnamecmp, (double)st.st_size);
1412         }
1413
1414         if (verbose > 2)
1415                 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1416
1417   notify_others:
1418         if (remove_source_files && !delay_updates && !phase)
1419                 increment_active_files(ndx, itemizing, code);
1420         write_int(f_out, ndx);
1421         if (itemizing) {
1422                 int iflags = ITEM_TRANSFER;
1423                 if (always_checksum)
1424                         iflags |= ITEM_REPORT_CHECKSUM;
1425                 if (fnamecmp_type != FNAMECMP_FNAME)
1426                         iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1427                 if (fnamecmp_type == FNAMECMP_FUZZY)
1428                         iflags |= ITEM_XNAME_FOLLOWS;
1429                 itemize(file, -1, real_ret, &real_st, iflags, fnamecmp_type,
1430                         fuzzy_file ? fuzzy_file->basename : NULL);
1431         }
1432
1433         if (!do_xfers) {
1434                 if (preserve_hard_links && file->link_u.links)
1435                         hard_link_cluster(file, ndx, itemizing, code);
1436                 return;
1437         }
1438         if (read_batch)
1439                 return;
1440
1441         if (statret != 0 || whole_file) {
1442                 write_sum_head(f_out, NULL);
1443                 return;
1444         }
1445
1446         generate_and_send_sums(fd, st.st_size, f_out, f_copy);
1447
1448         if (f_copy >= 0) {
1449                 close(f_copy);
1450                 set_file_attrs(backupptr, back_file, NULL, 0);
1451                 if (verbose > 1) {
1452                         rprintf(FINFO, "backed up %s to %s\n",
1453                                 fname, backupptr);
1454                 }
1455                 free(back_file);
1456         }
1457
1458         close(fd);
1459 }
1460
1461 void generate_files(int f_out, struct file_list *flist, char *local_name)
1462 {
1463         int i;
1464         char fbuf[MAXPATHLEN];
1465         int itemizing, maybe_ATTRS_REPORT;
1466         enum logcode code;
1467         int lull_mod = allowed_lull * 5;
1468         int need_retouch_dir_times = preserve_times && !omit_dir_times;
1469         int need_retouch_dir_perms = 0;
1470         int save_ignore_existing = ignore_existing;
1471         int save_ignore_non_existing = ignore_non_existing;
1472         int save_do_progress = do_progress;
1473         int save_make_backups = make_backups;
1474         int dir_tweaking = !(list_only || local_name || dry_run);
1475
1476         if (protocol_version >= 29) {
1477                 itemizing = 1;
1478                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
1479                 code = logfile_format_has_i ? FNONE : FLOG;
1480         } else if (am_daemon) {
1481                 itemizing = logfile_format_has_i && do_xfers;
1482                 maybe_ATTRS_REPORT = ATTRS_REPORT;
1483                 code = itemizing || !do_xfers ? FCLIENT : FINFO;
1484         } else if (!am_server) {
1485                 itemizing = stdout_format_has_i;
1486                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
1487                 code = itemizing ? FNONE : FINFO;
1488         } else {
1489                 itemizing = 0;
1490                 maybe_ATTRS_REPORT = ATTRS_REPORT;
1491                 code = FINFO;
1492         }
1493
1494         if (verbose > 2) {
1495                 rprintf(FINFO, "generator starting pid=%ld count=%d\n",
1496                         (long)getpid(), flist->count);
1497         }
1498
1499         if (delete_before && !local_name && flist->count > 0)
1500                 do_delete_pass(flist);
1501         do_progress = 0;
1502
1503         if (append_mode || whole_file < 0)
1504                 whole_file = 0;
1505         if (verbose >= 2) {
1506                 rprintf(FINFO, "delta-transmission %s\n",
1507                         whole_file
1508                         ? "disabled for local transfer or --whole-file"
1509                         : "enabled");
1510         }
1511
1512         /* Since we often fill up the outgoing socket and then just sit around
1513          * waiting for the other 2 processes to do their thing, we don't want
1514          * to exit on a timeout.  If the data stops flowing, the receiver will
1515          * notice that and let us know via the redo pipe (or its closing). */
1516         ignore_timeout = 1;
1517
1518         for (i = 0; i < flist->count; i++) {
1519                 struct file_struct *file = flist->files[i];
1520
1521                 if (!file->basename)
1522                         continue;
1523
1524                 if (local_name)
1525                         strlcpy(fbuf, local_name, sizeof fbuf);
1526                 else
1527                         f_name(file, fbuf);
1528                 recv_generator(fbuf, file, i, itemizing, maybe_ATTRS_REPORT,
1529                                code, f_out);
1530
1531                 /* We need to ensure that any dirs we create have writeable
1532                  * permissions during the time we are putting files within
1533                  * them.  This is then fixed after the transfer is done. */
1534 #ifdef HAVE_CHMOD
1535                 if (!am_root && S_ISDIR(file->mode) && !(file->mode & S_IWUSR)
1536                  && dir_tweaking) {
1537                         mode_t mode = file->mode | S_IWUSR; /* user write */
1538                         char *fname = local_name ? local_name : fbuf;
1539                         if (do_chmod(fname, mode) < 0) {
1540                                 rsyserr(FERROR, errno,
1541                                         "failed to modify permissions on %s",
1542                                         full_fname(fname));
1543                         }
1544                         need_retouch_dir_perms = 1;
1545                 }
1546 #endif
1547
1548                 if (preserve_hard_links)
1549                         check_for_finished_hlinks(itemizing, code);
1550
1551                 if (allowed_lull && !(i % lull_mod))
1552                         maybe_send_keepalive();
1553                 else if (!(i % 200))
1554                         maybe_flush_socket();
1555         }
1556         recv_generator(NULL, NULL, 0, 0, 0, code, -1);
1557         if (delete_during)
1558                 delete_in_dir(NULL, NULL, NULL, NULL);
1559
1560         phase++;
1561         csum_length = SUM_LENGTH;
1562         max_size = min_size = ignore_existing = ignore_non_existing = 0;
1563         update_only = always_checksum = size_only = 0;
1564         ignore_times = 1;
1565         if (append_mode)  /* resend w/o append mode */
1566                 append_mode = -1; /* ... but only longer files */
1567         make_backups = 0; /* avoid a duplicate backup for inplace processing */
1568
1569         if (verbose > 2)
1570                 rprintf(FINFO,"generate_files phase=%d\n",phase);
1571
1572         write_int(f_out, -1);
1573
1574         /* files can cycle through the system more than once
1575          * to catch initial checksum errors */
1576         while ((i = get_redo_num(itemizing, code)) != -1) {
1577                 struct file_struct *file = flist->files[i];
1578                 if (local_name)
1579                         strlcpy(fbuf, local_name, sizeof fbuf);
1580                 else
1581                         f_name(file, fbuf);
1582                 recv_generator(fbuf, file, i, itemizing, maybe_ATTRS_REPORT,
1583                                code, f_out);
1584         }
1585
1586         phase++;
1587         ignore_non_existing = save_ignore_non_existing;
1588         ignore_existing = save_ignore_existing;
1589         make_backups = save_make_backups;
1590
1591         if (verbose > 2)
1592                 rprintf(FINFO,"generate_files phase=%d\n",phase);
1593
1594         write_int(f_out, -1);
1595         /* Reduce round-trip lag-time for a useless delay-updates phase. */
1596         if (protocol_version >= 29 && !delay_updates)
1597                 write_int(f_out, -1);
1598
1599         /* Read MSG_DONE for the redo phase (and any prior messages). */
1600         get_redo_num(itemizing, code);
1601
1602         if (protocol_version >= 29) {
1603                 phase++;
1604                 if (verbose > 2)
1605                         rprintf(FINFO, "generate_files phase=%d\n", phase);
1606                 if (delay_updates)
1607                         write_int(f_out, -1);
1608                 /* Read MSG_DONE for delay-updates phase & prior messages. */
1609                 get_redo_num(itemizing, code);
1610         }
1611
1612         do_progress = save_do_progress;
1613         if (delete_after && !local_name && flist->count > 0)
1614                 do_delete_pass(flist);
1615
1616         if ((need_retouch_dir_perms || need_retouch_dir_times) && dir_tweaking) {
1617                 int j = 0;
1618                 /* Now we need to fix any directory permissions that were
1619                  * modified during the transfer and/or re-set any tweaked
1620                  * modified-time values. */
1621                 for (i = 0; i < flist->count; i++) {
1622                         struct file_struct *file = flist->files[i];
1623
1624                         if (!file->basename || !S_ISDIR(file->mode))
1625                                 continue;
1626                         if (!need_retouch_dir_times && file->mode & S_IWUSR)
1627                                 continue;
1628                         if (file->flags & FLAG_MISSING) {
1629                                 int missing = file->dir.depth;
1630                                 while (++i < flist->count) {
1631                                         file = flist->files[i];
1632                                         if (file->dir.depth <= missing)
1633                                                 break;
1634                                 }
1635                                 i--;
1636                                 continue;
1637                         }
1638                         recv_generator(f_name(file, NULL), file, i, itemizing,
1639                                        maybe_ATTRS_REPORT, code, -1);
1640                         if (allowed_lull && !(++j % lull_mod))
1641                                 maybe_send_keepalive();
1642                         else if (!(j % 200))
1643                                 maybe_flush_socket();
1644                 }
1645         }
1646         recv_generator(NULL, NULL, 0, 0, 0, code, -1);
1647
1648         if (max_delete >= 0 && deletion_count > max_delete) {
1649                 rprintf(FINFO,
1650                         "Deletions stopped due to --max-delete limit (%d skipped)\n",
1651                         deletion_count - max_delete);
1652                 io_error |= IOERR_DEL_LIMIT;
1653         }
1654
1655         if (verbose > 2)
1656                 rprintf(FINFO,"generate_files finished\n");
1657 }