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_file() */
  99 #define DEL_FORCE_RECURSE       (1<<1) /* recurse even w/o --force */
 100 #define DEL_TERSE               (1<<3)
 101
 102
 103 static int is_backup_file(char *fn)
 104 {
 105         int k = strlen(fn) - backup_suffix_len;
 106         return k > 0 && strcmp(fn+k, backup_suffix) == 0;
 107 }
 108
 109
 110 /* Delete a file or directory.  If DEL_FORCE_RECURSE is set in the flags, or if
 111  * force_delete is set, this will delete recursively.
 112  *
 113  * Note that fname must point to a MAXPATHLEN buffer if the mode indicates it's
 114  * a directory! (The buffer is used for recursion, but returned unchanged.)
 115  */
 116 static int delete_item(char *fname, int mode, int flags)
 117 {
 118         struct file_list *dirlist;
 119         int j, dlen, zap_dir, ok;
 120         unsigned remainder;
 121         void *save_filters;
 122         char *p;
 123
 124         if (!S_ISDIR(mode)) {
 125                 if (max_delete && ++deletion_count > max_delete)
 126                         return 0;
 127                 if (make_backups && (backup_dir || !is_backup_file(fname)))
 128                         ok = make_backup(fname);
 129                 else
 130                         ok = robust_unlink(fname) == 0;
 131                 if (ok) {
 132                         if (!(flags & DEL_TERSE))
 133                                 log_delete(fname, mode);
 134                         return 0;
 135                 }
 136                 if (errno == ENOENT) {
 137                         deletion_count--;
 138                         return 0;
 139                 }
 140                 rsyserr(FERROR, errno, "delete_file: unlink %s failed",
 141                         full_fname(fname));
 142                 return -1;
 143         }
 144
 145         zap_dir = flags & DEL_FORCE_RECURSE || force_delete;
 146         if ((max_delete && ++deletion_count > max_delete)
 147             || (dry_run && zap_dir)) {
 148                 ok = 0;
 149                 errno = ENOTEMPTY;
 150         } else if (make_backups && !backup_dir && !is_backup_file(fname)
 151             && !(flags & DEL_FORCE_RECURSE))
 152                 ok = make_backup(fname);
 153         else
 154                 ok = do_rmdir(fname) == 0;
 155         if (ok) {
 156                 if (!(flags & DEL_TERSE))
 157                         log_delete(fname, mode);
 158                 return 0;
 159         }
 160         if (errno == ENOENT) {
 161                 deletion_count--;
 162                 return 0;
 163         }
 164         if (!zap_dir) {
 165                 rsyserr(FERROR, errno, "delete_file: rmdir %s failed",
 166                         full_fname(fname));
 167                 return -1;
 168         }
 169         flags |= DEL_FORCE_RECURSE; /* mark subdir dels as not "in the way" */
 170         deletion_count--;
 171
 172         dlen = strlen(fname);
 173         save_filters = push_local_filters(fname, dlen);
 174
 175         dirlist = get_dirlist(fname, dlen, 0);
 176
 177         p = fname + dlen;
 178         if (dlen != 1 || *fname != '/')
 179                 *p++ = '/';
 180         remainder = MAXPATHLEN - (p - fname);
 181
 182         for (j = dirlist->count; j--; ) {
 183                 struct file_struct *fp = dirlist->files[j];
 184
 185                 if (fp->flags & FLAG_MOUNT_POINT)
 186                         continue;
 187
 188                 strlcpy(p, fp->basename, remainder);
 189                 delete_item(fname, fp->mode, flags & ~DEL_TERSE);
 190         }
 191         flist_free(dirlist);
 192
 193         fname[dlen] = '\0';
 194
 195         pop_local_filters(save_filters);
 196
 197         if (max_delete && ++deletion_count > max_delete)
 198                 return 0;
 199
 200         if (do_rmdir(fname) == 0) {
 201                 if (!(flags & DEL_TERSE))
 202                         log_delete(fname, mode);
 203         } else if (errno != ENOTEMPTY && errno != EEXIST && errno != ENOENT) {
 204                 rsyserr(FERROR, errno, "delete_file: rmdir %s failed",
 205                         full_fname(fname));
 206                 return -1;
 207         }
 208
 209         return 0;
 210 }
 211
 212
 213 /* This function is used to implement per-directory deletion, and is used by
 214  * all the --delete-WHEN options.  Note that the fbuf pointer must point to a
 215  * MAXPATHLEN buffer with the name of the directory in it (the functions we
 216  * call will append names onto the end, but the old dir value will be restored
 217  * on exit). */
 218 static void delete_in_dir(struct file_list *flist, char *fbuf,
 219                           struct file_struct *file, STRUCT_STAT *stp)
 220 {
 221         static int min_depth = MAXPATHLEN, cur_depth = -1;
 222         static void *filt_array[MAXPATHLEN/2+1];
 223         static int already_warned = 0;
 224         struct file_list *dirlist;
 225         char delbuf[MAXPATHLEN];
 226         int dlen, i;
 227
 228         if (!flist) {
 229                 while (cur_depth >= min_depth)
 230                         pop_local_filters(filt_array[cur_depth--]);
 231                 min_depth = MAXPATHLEN;
 232                 cur_depth = -1;
 233                 return;
 234         }
 235
 236         if (verbose > 2)
 237                 rprintf(FINFO, "delete_in_dir(%s)\n", fbuf);
 238
 239         if (allowed_lull)
 240                 maybe_send_keepalive();
 241
 242         if (file->dir.depth >= MAXPATHLEN/2+1)
 243                 return; /* Impossible... */
 244
 245         if (io_error && !(lp_ignore_errors(module_id) || ignore_errors)) {
 246                 if (already_warned)
 247                         return;
 248                 rprintf(FINFO,
 249                         "IO error encountered -- skipping file deletion\n");
 250                 already_warned = 1;
 251                 return;
 252         }
 253
 254         while (cur_depth >= file->dir.depth && cur_depth >= min_depth)
 255                 pop_local_filters(filt_array[cur_depth--]);
 256         cur_depth = file->dir.depth;
 257         if (min_depth > cur_depth)
 258                 min_depth = cur_depth;
 259         dlen = strlen(fbuf);
 260         filt_array[cur_depth] = push_local_filters(fbuf, dlen);
 261
 262         if (one_file_system) {
 263                 if (file->flags & FLAG_TOP_DIR)
 264                         filesystem_dev = stp->st_dev;
 265                 else if (filesystem_dev != stp->st_dev)
 266                         return;
 267         }
 268
 269         dirlist = get_dirlist(fbuf, dlen, 0);
 270
 271         /* If an item in dirlist is not found in flist, delete it
 272          * from the filesystem. */
 273         for (i = dirlist->count; i--; ) {
 274                 struct file_struct *fp = dirlist->files[i];
 275                 if (!fp->basename || fp->flags & FLAG_MOUNT_POINT)
 276                         continue;
 277                 if (flist_find(flist, fp) < 0) {
 278                         f_name(fp, delbuf);
 279                         delete_item(delbuf, fp->mode, DEL_FORCE_RECURSE);
 280                 }
 281         }
 282
 283         flist_free(dirlist);
 284 }
 285
 286 /* This deletes any files on the receiving side that are not present on the
 287  * sending side.  This is used by --delete-before and --delete-after. */
 288 static void do_delete_pass(struct file_list *flist)
 289 {
 290         char fbuf[MAXPATHLEN];
 291         STRUCT_STAT st;
 292         int j;
 293
 294         /* dry_run is incremented when the destination doesn't exist yet. */
 295         if (dry_run > 1 || list_only)
 296                 return;
 297
 298         for (j = 0; j < flist->count; j++) {
 299                 struct file_struct *file = flist->files[j];
 300
 301                 if (!(file->flags & FLAG_DEL_HERE))
 302                         continue;
 303
 304                 f_name(file, fbuf);
 305                 if (verbose > 1 && file->flags & FLAG_TOP_DIR)
 306                         rprintf(FINFO, "deleting in %s\n", fbuf);
 307
 308                 if (link_stat(fbuf, &st, keep_dirlinks) < 0
 309                  || !S_ISDIR(st.st_mode))
 310                         continue;
 311
 312                 delete_in_dir(flist, fbuf, file, &st);
 313         }
 314         delete_in_dir(NULL, NULL, NULL, NULL);
 315
 316         if (do_progress && !am_server)
 317                 rprintf(FINFO, "                    \r");
 318 }
 319
 320 int unchanged_attrs(struct file_struct *file, STRUCT_STAT *st)
 321 {
 322         if (preserve_perms
 323          && (st->st_mode & CHMOD_BITS) != (file->mode & CHMOD_BITS))
 324                 return 0;
 325
 326         if (am_root && preserve_uid && st->st_uid != file->uid)
 327                 return 0;
 328
 329         if (preserve_gid && file->gid != GID_NONE && st->st_gid != file->gid)
 330                 return 0;
 331
 332         return 1;
 333 }
 334
 335 void itemize(struct file_struct *file, int ndx, int statret, STRUCT_STAT *st,
 336              int32 iflags, uchar fnamecmp_type, char *xname)
 337 {
 338         if (statret >= 0) { /* A from-dest-dir statret can == 1! */
 339                 int keep_time = !preserve_times ? 0
 340                     : S_ISDIR(file->mode) ? !omit_dir_times
 341                     : !S_ISLNK(file->mode);
 342
 343                 if (S_ISREG(file->mode) && file->length != st->st_size)
 344                         iflags |= ITEM_REPORT_SIZE;
 345                 if ((iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !keep_time
 346                      && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
 347                     || (keep_time && cmp_time(file->modtime, st->st_mtime) != 0))
 348                         iflags |= ITEM_REPORT_TIME;
 349                 if ((file->mode & CHMOD_BITS) != (st->st_mode & CHMOD_BITS))
 350                         iflags |= ITEM_REPORT_PERMS;
 351                 if (preserve_uid && am_root && file->uid != st->st_uid)
 352                         iflags |= ITEM_REPORT_OWNER;
 353                 if (preserve_gid && file->gid != GID_NONE
 354                     && st->st_gid != file->gid)
 355                         iflags |= ITEM_REPORT_GROUP;
 356         } else
 357                 iflags |= ITEM_IS_NEW;
 358
 359         iflags &= 0xffff;
 360         if ((iflags & SIGNIFICANT_ITEM_FLAGS || verbose > 1
 361           || stdout_format_has_i > 1 || (xname && *xname)) && !read_batch) {
 362                 if (protocol_version >= 29) {
 363                         if (ndx >= 0)
 364                                 write_int(sock_f_out, ndx);
 365                         write_shortint(sock_f_out, iflags);
 366                         if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
 367                                 write_byte(sock_f_out, fnamecmp_type);
 368                         if (iflags & ITEM_XNAME_FOLLOWS)
 369                                 write_vstring(sock_f_out, xname, strlen(xname));
 370                 } else if (ndx >= 0) {
 371                         enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
 372                         log_item(code, file, &stats, iflags, xname);
 373                 }
 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 best_match = -1;
 612         int match_level = 0;
 613         int j = 0;
 614
 615         do {
 616                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 617                 if (link_stat(cmpbuf, stp, 0) < 0 || !S_ISREG(stp->st_mode))
 618                         continue;
 619                 switch (match_level) {
 620                 case 0:
 621                         best_match = j;
 622                         match_level = 1;
 623                         /* FALL THROUGH */
 624                 case 1:
 625                         if (!unchanged_file(cmpbuf, file, stp))
 626                                 continue;
 627                         best_match = j;
 628                         match_level = 2;
 629                         /* FALL THROUGH */
 630                 case 2:
 631                         if (!unchanged_attrs(file, stp))
 632                                 continue;
 633                         if (always_checksum && preserve_times
 634                          && cmp_time(stp->st_mtime, file->modtime))
 635                                 continue;
 636                         best_match = j;
 637                         match_level = 3;
 638                         break;
 639                 }
 640                 break;
 641         } while (basis_dir[++j] != NULL);
 642
 643         if (!match_level)
 644                 return -1;
 645
 646         if (j != best_match) {
 647                 j = best_match;
 648                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 649                 if (link_stat(cmpbuf, stp, 0) < 0)
 650                         match_level = 0;
 651         }
 652
 653         if (match_level == 3 && !copy_dest) {
 654 #ifdef SUPPORT_HARD_LINKS
 655                 if (link_dest) {
 656                         if (hard_link_one(file, ndx, fname, 0, stp,
 657                                           cmpbuf, 1,
 658                                           itemizing && verbose > 1,
 659                                           code) < 0)
 660                                 goto try_a_copy;
 661                         if (preserve_hard_links && file->link_u.links) {
 662                                 if (dry_run)
 663                                         file->link_u.links->link_dest_used = j + 1;
 664                                 hard_link_cluster(file, ndx, itemizing, code);
 665                         }
 666                 } else
 667 #endif
 668                 if (itemizing)
 669                         itemize(file, ndx, 0, stp, 0, 0, NULL);
 670                 if (verbose > 1 && maybe_ATTRS_REPORT) {
 671                         rprintf(FCLIENT, "%s is uptodate\n", fname);
 672                 }
 673                 return -2;
 674         }
 675
 676         if (match_level >= 2) {
 677           try_a_copy: /* Copy the file locally. */
 678                 if (copy_file(cmpbuf, fname, file->mode) < 0) {
 679                         if (verbose) {
 680                                 rsyserr(FINFO, errno, "copy_file %s => %s",
 681                                         full_fname(cmpbuf), fname);
 682                         }
 683                         return -1;
 684                 }
 685                 if (itemizing)
 686                         itemize(file, ndx, 0, stp, ITEM_LOCAL_CHANGE, 0, NULL);
 687                 set_file_attrs(fname, file, NULL, 0);
 688                 if (maybe_ATTRS_REPORT
 689                  && ((!itemizing && verbose && match_level == 2)
 690                   || (verbose > 1 && match_level == 3))) {
 691                         code = match_level == 3 ? FCLIENT : FINFO;
 692                         rprintf(code, "%s%s\n", fname,
 693                                 match_level == 3 ? " is uptodate" : "");
 694                 }
 695                 if (preserve_hard_links && file->link_u.links)
 696                         hard_link_cluster(file, ndx, itemizing, code);
 697                 return -2;
 698         }
 699
 700         return FNAMECMP_BASIS_DIR_LOW + j;
 701 }
 702
 703 /* This is only called for non-regular files.  We return -2 if we've finished
 704  * handling the file, or -1 if no dest-linking occurred. */
 705 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
 706                          int itemizing, int maybe_ATTRS_REPORT,
 707                          enum logcode code)
 708 {
 709         char fnamebuf[MAXPATHLEN];
 710         STRUCT_STAT st;
 711         int i = 0;
 712
 713         do {
 714                 pathjoin(fnamebuf, MAXPATHLEN, basis_dir[i], fname);
 715                 if (link_stat(fnamebuf, &st, 0) < 0 || S_ISDIR(st.st_mode)
 716                  || !unchanged_attrs(file, &st))
 717                         continue;
 718                 if (S_ISLNK(file->mode)) {
 719 #ifdef SUPPORT_LINKS
 720                         char lnk[MAXPATHLEN];
 721                         int len;
 722                         if ((len = readlink(fnamebuf, lnk, MAXPATHLEN-1)) <= 0)
 723                                 continue;
 724                         lnk[len] = '\0';
 725                         if (strcmp(lnk, file->u.link) != 0)
 726 #endif
 727                                 continue;
 728                 } else if (IS_SPECIAL(file->mode)) {
 729                         if (!IS_SPECIAL(st.st_mode) || st.st_rdev != file->u.rdev)
 730                                 continue;
 731                 } else if (IS_DEVICE(file->mode)) {
 732                         if (!IS_DEVICE(st.st_mode) || st.st_rdev != file->u.rdev)
 733                                 continue;
 734                 } else {
 735                         rprintf(FERROR,
 736                                 "internal: try_dests_non() called with invalid mode (%o)\n",
 737                                 (int)file->mode);
 738                         exit_cleanup(RERR_UNSUPPORTED);
 739                 }
 740 #ifdef SUPPORT_HARD_LINKS
 741                 if (link_dest
 742 #ifndef CAN_HARDLINK_SYMLINK
 743                  && !S_ISLNK(file->mode)
 744 #endif
 745 #ifndef CAN_HARDLINK_SPECIAL
 746                  && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
 747 #endif
 748                 ) {
 749                         if (do_link(fnamebuf, fname) < 0) {
 750                                 rsyserr(FERROR, errno,
 751                                         "failed to hard-link %s with %s",
 752                                         fnamebuf, fname);
 753                                 break;
 754                         }
 755                         if (preserve_hard_links && file->link_u.links)
 756                                 hard_link_cluster(file, ndx, itemizing, code);
 757                 }
 758 #endif
 759                 if (itemizing && stdout_format_has_i && verbose > 1) {
 760                         int changes = compare_dest ? 0 : ITEM_LOCAL_CHANGE
 761                                     + (link_dest ? ITEM_XNAME_FOLLOWS : 0);
 762                         char *lp = link_dest ? "" : NULL;
 763                         itemize(file, ndx, 0, &st, changes, 0, lp);
 764                 }
 765                 if (verbose > 1 && maybe_ATTRS_REPORT) {
 766                         rprintf(FCLIENT, "%s is uptodate\n", fname);
 767                 }
 768                 return -2;
 769         } while (basis_dir[++i] != NULL);
 770
 771         return -1;
 772 }
 773
 774 static int phase = 0;
 775
 776 /* Acts on the_file_list->file's ndx'th item, whose name is fname.  If a dir,
 777  * make sure it exists, and has the right permissions/timestamp info.  For
 778  * all other non-regular files (symlinks, etc.) we create them here.  For
 779  * regular files that have changed, we try to find a basis file and then
 780  * start sending checksums.
 781  *
 782  * When fname is non-null, it must point to a MAXPATHLEN buffer!
 783  *
 784  * Note that f_out is set to -1 when doing final directory-permission and
 785  * modification-time repair. */
 786 static void recv_generator(char *fname, struct file_struct *file, int ndx,
 787                            int itemizing, int maybe_ATTRS_REPORT,
 788                            enum logcode code, int f_out)
 789 {
 790         static int missing_below = -1, excluded_below = -1;
 791         static char *parent_dirname = "";
 792         static struct file_list *fuzzy_dirlist = NULL;
 793         static int need_fuzzy_dirlist = 0;
 794         struct file_struct *fuzzy_file = NULL;
 795         int fd = -1, f_copy = -1;
 796         STRUCT_STAT st, real_st, partial_st;
 797         struct file_struct *back_file = NULL;
 798         int statret, real_ret, stat_errno;
 799         char *fnamecmp, *partialptr, *backupptr = NULL;
 800         char fnamecmpbuf[MAXPATHLEN];
 801         uchar fnamecmp_type;
 802         int del_opts = DEL_TERSE | (delete_mode ? DEL_FORCE_RECURSE : 0);
 803
 804         if (list_only)
 805                 return;
 806
 807         if (!fname) {
 808                 if (fuzzy_dirlist) {
 809                         flist_free(fuzzy_dirlist);
 810                         fuzzy_dirlist = NULL;
 811                 }
 812                 if (missing_below >= 0) {
 813                         if (dry_run)
 814                                 dry_run--;
 815                         missing_below = -1;
 816                 }
 817                 parent_dirname = "";
 818                 return;
 819         }
 820
 821         if (verbose > 2)
 822                 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
 823
 824         if (server_filter_list.head) {
 825                 if (excluded_below >= 0) {
 826                         if (file->dir.depth > excluded_below)
 827                                 goto skipping;
 828                         excluded_below = -1;
 829                 }
 830                 if (check_filter(&server_filter_list, fname,
 831                                  S_ISDIR(file->mode)) < 0) {
 832                         if (S_ISDIR(file->mode))
 833                                 excluded_below = file->dir.depth;
 834                   skipping:
 835                         if (verbose) {
 836                                 rprintf(FINFO,
 837                                         "skipping server-excluded file \"%s\"\n",
 838                                         fname);
 839                         }
 840                         return;
 841                 }
 842         }
 843
 844         if (missing_below >= 0) {
 845                 if (file->dir.depth <= missing_below) {
 846                         if (dry_run)
 847                                 dry_run--;
 848                         missing_below = -1;
 849                 } else if (!dry_run)
 850                         return;
 851         }
 852         if (dry_run > 1) {
 853                 statret = -1;
 854                 stat_errno = ENOENT;
 855         } else {
 856                 char *dn = file->dirname ? file->dirname : ".";
 857                 if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
 858                         if (relative_paths && !implied_dirs
 859                          && do_stat(dn, &st) < 0
 860                          && create_directory_path(fname) < 0) {
 861                                 rsyserr(FERROR, errno,
 862                                         "recv_generator: mkdir %s failed",
 863                                         full_fname(dn));
 864                         }
 865                         if (fuzzy_dirlist) {
 866                                 flist_free(fuzzy_dirlist);
 867                                 fuzzy_dirlist = NULL;
 868                         }
 869                         if (fuzzy_basis)
 870                                 need_fuzzy_dirlist = 1;
 871                 }
 872                 parent_dirname = dn;
 873
 874                 if (need_fuzzy_dirlist && S_ISREG(file->mode)) {
 875                         fuzzy_dirlist = get_dirlist(dn, -1, 1);
 876                         need_fuzzy_dirlist = 0;
 877                 }
 878
 879                 statret = link_stat(fname, &st,
 880                                     keep_dirlinks && S_ISDIR(file->mode));
 881                 stat_errno = errno;
 882         }
 883
 884         if (ignore_non_existing && statret == -1 && stat_errno == ENOENT) {
 885                 if (verbose > 1) {
 886                         rprintf(FINFO, "not creating new %s \"%s\"\n",
 887                                 S_ISDIR(file->mode) ? "directory" : "file",
 888                                 fname);
 889                 }
 890                 return;
 891         }
 892
 893         /* If we're not preserving permissions, change the file-list's
 894          * mode based on the local permissions and some heuristics. */
 895         if (!preserve_perms) {
 896                 int exists = statret == 0
 897                           && S_ISDIR(st.st_mode) == S_ISDIR(file->mode);
 898                 file->mode = dest_mode(file->mode, st.st_mode, exists);
 899         }
 900
 901         if (S_ISDIR(file->mode)) {
 902                 /* The file to be received is a directory, so we need
 903                  * to prepare appropriately.  If there is already a
 904                  * file of that name and it is *not* a directory, then
 905                  * we need to delete it.  If it doesn't exist, then
 906                  * (perhaps recursively) create it. */
 907                 if (statret == 0 && !S_ISDIR(st.st_mode)) {
 908                         if (delete_item(fname, st.st_mode, del_opts) < 0)
 909                                 return;
 910                         statret = -1;
 911                 }
 912                 if (dry_run && statret != 0 && missing_below < 0) {
 913                         missing_below = file->dir.depth;
 914                         dry_run++;
 915                 }
 916                 if (itemizing && f_out != -1) {
 917                         int sr = statret;
 918                         if (new_root_dir) {
 919                                 if (*fname == '.' && fname[1] == '\0')
 920                                         sr = -1;
 921                                 new_root_dir = 0;
 922                         }
 923                         itemize(file, ndx, sr, &st,
 924                                 sr ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
 925                 }
 926                 if (statret != 0 && do_mkdir(fname,file->mode) < 0 && errno != EEXIST) {
 927                         if (!relative_paths || errno != ENOENT
 928                             || create_directory_path(fname) < 0
 929                             || (do_mkdir(fname, file->mode) < 0 && errno != EEXIST)) {
 930                                 rsyserr(FERROR, errno,
 931                                         "recv_generator: mkdir %s failed",
 932                                         full_fname(fname));
 933                                 file->flags |= FLAG_MISSING;
 934                                 if (ndx+1 < the_file_list->count
 935                                  && the_file_list->files[ndx+1]->dir.depth > file->dir.depth) {
 936                                         rprintf(FERROR,
 937                                             "*** Skipping everything below this failed directory ***\n");
 938                                         missing_below = file->dir.depth;
 939                                 }
 940                                 return;
 941                         }
 942                 }
 943                 if (set_file_attrs(fname, file, statret ? NULL : &st, 0)
 944                     && verbose && code != FNONE && f_out != -1)
 945                         rprintf(code, "%s/\n", fname);
 946                 if (delete_during && f_out != -1 && !phase && dry_run < 2
 947                     && (file->flags & FLAG_DEL_HERE))
 948                         delete_in_dir(the_file_list, fname, file, &st);
 949                 return;
 950         }
 951
 952         if (preserve_hard_links && file->link_u.links
 953             && hard_link_check(file, ndx, fname, statret, &st,
 954                                itemizing, code, HL_CHECK_MASTER))
 955                 return;
 956
 957         if (preserve_links && S_ISLNK(file->mode)) {
 958 #ifdef SUPPORT_LINKS
 959                 if (safe_symlinks && unsafe_symlink(file->u.link, fname)) {
 960                         if (verbose) {
 961                                 if (the_file_list->count == 1)
 962                                         fname = f_name(file, NULL);
 963                                 rprintf(FINFO,
 964                                         "ignoring unsafe symlink %s -> \"%s\"\n",
 965                                         full_fname(fname), file->u.link);
 966                         }
 967                         return;
 968                 }
 969                 if (statret == 0) {
 970                         char lnk[MAXPATHLEN];
 971                         int len;
 972
 973                         if (!S_ISDIR(st.st_mode)
 974                             && (len = readlink(fname, lnk, MAXPATHLEN-1)) > 0) {
 975                                 lnk[len] = 0;
 976                                 /* A link already pointing to the
 977                                  * right place -- no further action
 978                                  * required. */
 979                                 if (strcmp(lnk, file->u.link) == 0) {
 980                                         if (itemizing) {
 981                                                 itemize(file, ndx, 0, &st, 0,
 982                                                         0, NULL);
 983                                         }
 984                                         set_file_attrs(fname, file, &st,
 985                                                        maybe_ATTRS_REPORT);
 986                                         if (preserve_hard_links
 987                                             && file->link_u.links) {
 988                                                 hard_link_cluster(file, ndx,
 989                                                                   itemizing,
 990                                                                   code);
 991                                         }
 992                                         if (remove_source_files == 1)
 993                                                 goto return_with_success;
 994                                         return;
 995                                 }
 996                         }
 997                         /* Not the right symlink (or not a symlink), so
 998                          * delete it. */
 999                         if (delete_item(fname, st.st_mode, del_opts) < 0)
1000                                 return;
1001                         if (!S_ISLNK(st.st_mode))
1002                                 statret = -1;
1003                 } else if (basis_dir[0] != NULL) {
1004                         if (try_dests_non(file, fname, ndx, itemizing,
1005                                           maybe_ATTRS_REPORT, code) == -2) {
1006 #ifndef CAN_HARDLINK_SYMLINK
1007                                 if (link_dest) {
1008                                         /* Resort to --copy-dest behavior. */
1009                                 } else
1010 #endif
1011                                 if (!copy_dest)
1012                                         return;
1013                                 itemizing = 0;
1014                                 code = FNONE;
1015                         }
1016                 }
1017                 if (preserve_hard_links && file->link_u.links
1018                     && hard_link_check(file, ndx, fname, -1, &st,
1019                                        itemizing, code, HL_SKIP))
1020                         return;
1021                 if (do_symlink(file->u.link,fname) != 0) {
1022                         rsyserr(FERROR, errno, "symlink %s -> \"%s\" failed",
1023                                 full_fname(fname), file->u.link);
1024                 } else {
1025                         set_file_attrs(fname, file, NULL, 0);
1026                         if (itemizing) {
1027                                 itemize(file, ndx, statret, &st,
1028                                         ITEM_LOCAL_CHANGE, 0, NULL);
1029                         }
1030                         if (code != FNONE && verbose) {
1031                                 rprintf(code, "%s -> %s\n", fname,
1032                                         file->u.link);
1033                         }
1034                         if (preserve_hard_links && file->link_u.links)
1035                                 hard_link_cluster(file, ndx, itemizing, code);
1036                         if (remove_source_files)
1037                                 goto return_with_success;
1038                 }
1039 #endif
1040                 return;
1041         }
1042
1043         if ((am_root && preserve_devices && IS_DEVICE(file->mode))
1044          || (preserve_specials && IS_SPECIAL(file->mode))) {
1045                 if (statret != 0 && basis_dir[0] != NULL) {
1046                         if (try_dests_non(file, fname, ndx, itemizing,
1047                                           maybe_ATTRS_REPORT, code) == -2) {
1048 #ifndef CAN_HARDLINK_SPECIAL
1049                                 if (link_dest) {
1050                                         /* Resort to --copy-dest behavior. */
1051                                 } else
1052 #endif
1053                                 if (!copy_dest)
1054                                         return;
1055                                 itemizing = 0;
1056                                 code = FNONE;
1057                         }
1058                 }
1059                 if (statret != 0
1060                  || (st.st_mode & ~CHMOD_BITS) != (file->mode & ~CHMOD_BITS)
1061                  || st.st_rdev != file->u.rdev) {
1062                         if (statret == 0
1063                          && delete_item(fname, st.st_mode, del_opts) < 0)
1064                                 return;
1065                         if (preserve_hard_links && file->link_u.links
1066                             && hard_link_check(file, ndx, fname, -1, &st,
1067                                                itemizing, code, HL_SKIP))
1068                                 return;
1069                         if ((IS_DEVICE(file->mode) && !IS_DEVICE(st.st_mode))
1070                          || (IS_SPECIAL(file->mode) && !IS_SPECIAL(st.st_mode)))
1071                                 statret = -1;
1072                         if (verbose > 2) {
1073                                 rprintf(FINFO,"mknod(%s,0%o,0x%x)\n",
1074                                         fname,
1075                                         (int)file->mode, (int)file->u.rdev);
1076                         }
1077                         if (do_mknod(fname,file->mode,file->u.rdev) < 0) {
1078                                 rsyserr(FERROR, errno, "mknod %s failed",
1079                                         full_fname(fname));
1080                         } else {
1081                                 set_file_attrs(fname, file, NULL, 0);
1082                                 if (itemizing) {
1083                                         itemize(file, ndx, statret, &st,
1084                                                 ITEM_LOCAL_CHANGE, 0, NULL);
1085                                 }
1086                                 if (code != FNONE && verbose)
1087                                         rprintf(code, "%s\n", fname);
1088                                 if (preserve_hard_links && file->link_u.links) {
1089                                         hard_link_cluster(file, ndx,
1090                                                           itemizing, code);
1091                                 }
1092                                 if (remove_source_files == 1)
1093                                         goto return_with_success;
1094                         }
1095                 } else {
1096                         if (itemizing)
1097                                 itemize(file, ndx, statret, &st, 0, 0, NULL);
1098                         set_file_attrs(fname, file, &st, maybe_ATTRS_REPORT);
1099                         if (preserve_hard_links && file->link_u.links)
1100                                 hard_link_cluster(file, ndx, itemizing, code);
1101                         if (remove_source_files == 1)
1102                                 goto return_with_success;
1103                 }
1104                 return;
1105         }
1106
1107         if (!S_ISREG(file->mode)) {
1108                 if (the_file_list->count == 1)
1109                         fname = f_name(file, NULL);
1110                 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1111                 return;
1112         }
1113
1114         if (max_size && file->length > max_size) {
1115                 if (verbose > 1) {
1116                         if (the_file_list->count == 1)
1117                                 fname = f_name(file, NULL);
1118                         rprintf(FINFO, "%s is over max-size\n", fname);
1119                 }
1120                 return;
1121         }
1122         if (min_size && file->length < min_size) {
1123                 if (verbose > 1) {
1124                         if (the_file_list->count == 1)
1125                                 fname = f_name(file, NULL);
1126                         rprintf(FINFO, "%s is under min-size\n", fname);
1127                 }
1128                 return;
1129         }
1130
1131         if (ignore_existing && statret == 0) {
1132                 if (verbose > 1)
1133                         rprintf(FINFO, "%s exists\n", fname);
1134                 return;
1135         }
1136
1137         if (update_only && statret == 0
1138             && cmp_time(st.st_mtime, file->modtime) > 0) {
1139                 if (verbose > 1)
1140                         rprintf(FINFO, "%s is newer\n", fname);
1141                 return;
1142         }
1143
1144         fnamecmp = fname;
1145         fnamecmp_type = FNAMECMP_FNAME;
1146
1147         if (statret == 0 && !S_ISREG(st.st_mode)) {
1148                 if (delete_item(fname, st.st_mode, del_opts) != 0)
1149                         return;
1150                 statret = -1;
1151                 stat_errno = ENOENT;
1152         }
1153
1154         if (statret != 0 && basis_dir[0] != NULL) {
1155                 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &st,
1156                                       itemizing, maybe_ATTRS_REPORT, code);
1157                 if (j == -2) {
1158                         if (remove_source_files == 1)
1159                                 goto return_with_success;
1160                         return;
1161                 }
1162                 if (j >= 0) {
1163                         fnamecmp = fnamecmpbuf;
1164                         fnamecmp_type = j;
1165                         statret = 0;
1166                 }
1167         }
1168
1169         real_ret = statret;
1170         real_st = st;
1171
1172         if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1173             && link_stat(partialptr, &partial_st, 0) == 0
1174             && S_ISREG(partial_st.st_mode)) {
1175                 if (statret != 0)
1176                         goto prepare_to_open;
1177         } else
1178                 partialptr = NULL;
1179
1180         if (statret != 0 && fuzzy_dirlist && dry_run <= 1) {
1181                 int j = find_fuzzy(file, fuzzy_dirlist);
1182                 if (j >= 0) {
1183                         fuzzy_file = fuzzy_dirlist->files[j];
1184                         f_name(fuzzy_file, fnamecmpbuf);
1185                         if (verbose > 2) {
1186                                 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1187                                         fname, fnamecmpbuf);
1188                         }
1189                         st.st_size = fuzzy_file->length;
1190                         statret = 0;
1191                         fnamecmp = fnamecmpbuf;
1192                         fnamecmp_type = FNAMECMP_FUZZY;
1193                 }
1194         }
1195
1196         if (statret != 0) {
1197                 if (preserve_hard_links && file->link_u.links
1198                     && hard_link_check(file, ndx, fname, statret, &st,
1199                                        itemizing, code, HL_SKIP))
1200                         return;
1201                 if (stat_errno == ENOENT)
1202                         goto notify_others;
1203                 rsyserr(FERROR, stat_errno, "recv_generator: failed to stat %s",
1204                         full_fname(fname));
1205                 return;
1206         }
1207
1208         if (append_mode && st.st_size > file->length)
1209                 return;
1210
1211         if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1212                 ;
1213         else if (fnamecmp_type == FNAMECMP_FUZZY)
1214                 ;
1215         else if (unchanged_file(fnamecmp, file, &st)) {
1216                 if (partialptr) {
1217                         do_unlink(partialptr);
1218                         handle_partial_dir(partialptr, PDIR_DELETE);
1219                 }
1220                 if (itemizing) {
1221                         itemize(file, ndx, real_ret, &real_st,
1222                                 0, 0, NULL);
1223                 }
1224                 set_file_attrs(fname, file, &st, maybe_ATTRS_REPORT);
1225                 if (preserve_hard_links && file->link_u.links)
1226                         hard_link_cluster(file, ndx, itemizing, code);
1227                 if (remove_source_files != 1)
1228                         return;
1229           return_with_success:
1230                 if (!dry_run) {
1231                         char numbuf[4];
1232                         SIVAL(numbuf, 0, ndx);
1233                         send_msg(MSG_SUCCESS, numbuf, 4);
1234                 }
1235                 return;
1236         }
1237
1238   prepare_to_open:
1239         if (partialptr) {
1240                 st = partial_st;
1241                 fnamecmp = partialptr;
1242                 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1243                 statret = 0;
1244         }
1245
1246         if (!do_xfers || read_batch || whole_file)
1247                 goto notify_others;
1248
1249         if (fuzzy_dirlist) {
1250                 int j = flist_find(fuzzy_dirlist, file);
1251                 if (j >= 0) /* don't use changing file as future fuzzy basis */
1252                         fuzzy_dirlist->files[j]->flags |= FLAG_NO_FUZZY;
1253         }
1254
1255         /* open the file */
1256         fd = do_open(fnamecmp, O_RDONLY, 0);
1257
1258         if (fd == -1) {
1259                 rsyserr(FERROR, errno, "failed to open %s, continuing",
1260                         full_fname(fnamecmp));
1261           pretend_missing:
1262                 /* pretend the file didn't exist */
1263                 if (preserve_hard_links && file->link_u.links
1264                     && hard_link_check(file, ndx, fname, statret, &st,
1265                                        itemizing, code, HL_SKIP))
1266                         return;
1267                 statret = real_ret = -1;
1268                 goto notify_others;
1269         }
1270
1271         if (inplace && make_backups && fnamecmp_type == FNAMECMP_FNAME) {
1272                 if (!(backupptr = get_backup_name(fname))) {
1273                         close(fd);
1274                         return;
1275                 }
1276                 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1277                         close(fd);
1278                         goto pretend_missing;
1279                 }
1280                 if (robust_unlink(backupptr) && errno != ENOENT) {
1281                         rsyserr(FERROR, errno, "unlink %s",
1282                                 full_fname(backupptr));
1283                         free(back_file);
1284                         close(fd);
1285                         return;
1286                 }
1287                 if ((f_copy = do_open(backupptr,
1288                     O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1289                         rsyserr(FERROR, errno, "open %s",
1290                                 full_fname(backupptr));
1291                         free(back_file);
1292                         close(fd);
1293                         return;
1294                 }
1295                 fnamecmp_type = FNAMECMP_BACKUP;
1296         }
1297
1298         if (verbose > 3) {
1299                 rprintf(FINFO, "gen mapped %s of size %.0f\n",
1300                         fnamecmp, (double)st.st_size);
1301         }
1302
1303         if (verbose > 2)
1304                 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1305
1306   notify_others:
1307         if (remove_source_files && !delay_updates && !phase)
1308                 increment_active_files(ndx, itemizing, code);
1309         write_int(f_out, ndx);
1310         if (itemizing) {
1311                 int iflags = ITEM_TRANSFER;
1312                 if (always_checksum)
1313                         iflags |= ITEM_REPORT_CHECKSUM;
1314                 if (fnamecmp_type != FNAMECMP_FNAME)
1315                         iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1316                 if (fnamecmp_type == FNAMECMP_FUZZY)
1317                         iflags |= ITEM_XNAME_FOLLOWS;
1318                 itemize(file, -1, real_ret, &real_st, iflags, fnamecmp_type,
1319                         fuzzy_file ? fuzzy_file->basename : NULL);
1320         }
1321
1322         if (!do_xfers) {
1323                 if (preserve_hard_links && file->link_u.links)
1324                         hard_link_cluster(file, ndx, itemizing, code);
1325                 return;
1326         }
1327         if (read_batch)
1328                 return;
1329
1330         if (statret != 0 || whole_file) {
1331                 write_sum_head(f_out, NULL);
1332                 return;
1333         }
1334
1335         generate_and_send_sums(fd, st.st_size, f_out, f_copy);
1336
1337         if (f_copy >= 0) {
1338                 close(f_copy);
1339                 set_file_attrs(backupptr, back_file, NULL, 0);
1340                 if (verbose > 1) {
1341                         rprintf(FINFO, "backed up %s to %s\n",
1342                                 fname, backupptr);
1343                 }
1344                 free(back_file);
1345         }
1346
1347         close(fd);
1348 }
1349
1350 void generate_files(int f_out, struct file_list *flist, char *local_name)
1351 {
1352         int i;
1353         char fbuf[MAXPATHLEN];
1354         int itemizing, maybe_ATTRS_REPORT;
1355         enum logcode code;
1356         int lull_mod = allowed_lull * 5;
1357         int need_retouch_dir_times = preserve_times && !omit_dir_times;
1358         int need_retouch_dir_perms = 0;
1359         int save_ignore_existing = ignore_existing;
1360         int save_ignore_non_existing = ignore_non_existing;
1361         int save_do_progress = do_progress;
1362         int save_make_backups = make_backups;
1363         int dir_tweaking = !(list_only || local_name || dry_run);
1364
1365         if (protocol_version >= 29) {
1366                 itemizing = 1;
1367                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
1368                 code = logfile_format_has_i ? FNONE : FLOG;
1369         } else if (am_daemon) {
1370                 itemizing = logfile_format_has_i && do_xfers;
1371                 maybe_ATTRS_REPORT = ATTRS_REPORT;
1372                 code = itemizing || !do_xfers ? FCLIENT : FINFO;
1373         } else if (!am_server) {
1374                 itemizing = stdout_format_has_i;
1375                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
1376                 code = itemizing ? FNONE : FINFO;
1377         } else {
1378                 itemizing = 0;
1379                 maybe_ATTRS_REPORT = ATTRS_REPORT;
1380                 code = FINFO;
1381         }
1382
1383         if (verbose > 2) {
1384                 rprintf(FINFO, "generator starting pid=%ld count=%d\n",
1385                         (long)getpid(), flist->count);
1386         }
1387
1388         if (delete_before && !local_name && flist->count > 0)
1389                 do_delete_pass(flist);
1390         do_progress = 0;
1391
1392         if (append_mode || whole_file < 0)
1393                 whole_file = 0;
1394         if (verbose >= 2) {
1395                 rprintf(FINFO, "delta-transmission %s\n",
1396                         whole_file
1397                         ? "disabled for local transfer or --whole-file"
1398                         : "enabled");
1399         }
1400
1401         /* Since we often fill up the outgoing socket and then just sit around
1402          * waiting for the other 2 processes to do their thing, we don't want
1403          * to exit on a timeout.  If the data stops flowing, the receiver will
1404          * notice that and let us know via the redo pipe (or its closing). */
1405         ignore_timeout = 1;
1406
1407         for (i = 0; i < flist->count; i++) {
1408                 struct file_struct *file = flist->files[i];
1409
1410                 if (!file->basename)
1411                         continue;
1412
1413                 if (local_name)
1414                         strlcpy(fbuf, local_name, sizeof fbuf);
1415                 else
1416                         f_name(file, fbuf);
1417                 recv_generator(fbuf, file, i, itemizing, maybe_ATTRS_REPORT,
1418                                code, f_out);
1419
1420                 /* We need to ensure that any dirs we create have writeable
1421                  * permissions during the time we are putting files within
1422                  * them.  This is then fixed after the transfer is done. */
1423 #ifdef HAVE_CHMOD
1424                 if (!am_root && S_ISDIR(file->mode) && !(file->mode & S_IWUSR)
1425                  && dir_tweaking) {
1426                         mode_t mode = file->mode | S_IWUSR; /* user write */
1427                         char *fname = local_name ? local_name : fbuf;
1428                         if (do_chmod(fname, mode) < 0) {
1429                                 rsyserr(FERROR, errno,
1430                                         "failed to modify permissions on %s",
1431                                         full_fname(fname));
1432                         }
1433                         need_retouch_dir_perms = 1;
1434                 }
1435 #endif
1436
1437                 if (preserve_hard_links)
1438                         check_for_finished_hlinks(itemizing, code);
1439
1440                 if (allowed_lull && !(i % lull_mod))
1441                         maybe_send_keepalive();
1442                 else if (!(i % 200))
1443                         maybe_flush_socket();
1444         }
1445         recv_generator(NULL, NULL, 0, 0, 0, code, -1);
1446         if (delete_during)
1447                 delete_in_dir(NULL, NULL, NULL, NULL);
1448
1449         phase++;
1450         csum_length = SUM_LENGTH;
1451         max_size = min_size = ignore_existing = ignore_non_existing = 0;
1452         update_only = always_checksum = size_only = 0;
1453         ignore_times = 1;
1454         if (append_mode)  /* resend w/o append mode */
1455                 append_mode = -1; /* ... but only longer files */
1456         make_backups = 0; /* avoid a duplicate backup for inplace processing */
1457
1458         if (verbose > 2)
1459                 rprintf(FINFO,"generate_files phase=%d\n",phase);
1460
1461         write_int(f_out, -1);
1462
1463         /* files can cycle through the system more than once
1464          * to catch initial checksum errors */
1465         while ((i = get_redo_num(itemizing, code)) != -1) {
1466                 struct file_struct *file = flist->files[i];
1467                 if (local_name)
1468                         strlcpy(fbuf, local_name, sizeof fbuf);
1469                 else
1470                         f_name(file, fbuf);
1471                 recv_generator(fbuf, file, i, itemizing, maybe_ATTRS_REPORT,
1472                                code, f_out);
1473         }
1474
1475         phase++;
1476         ignore_non_existing = save_ignore_non_existing;
1477         ignore_existing = save_ignore_existing;
1478         make_backups = save_make_backups;
1479
1480         if (verbose > 2)
1481                 rprintf(FINFO,"generate_files phase=%d\n",phase);
1482
1483         write_int(f_out, -1);
1484         /* Reduce round-trip lag-time for a useless delay-updates phase. */
1485         if (protocol_version >= 29 && !delay_updates)
1486                 write_int(f_out, -1);
1487
1488         /* Read MSG_DONE for the redo phase (and any prior messages). */
1489         get_redo_num(itemizing, code);
1490
1491         if (protocol_version >= 29) {
1492                 phase++;
1493                 if (verbose > 2)
1494                         rprintf(FINFO, "generate_files phase=%d\n", phase);
1495                 if (delay_updates)
1496                         write_int(f_out, -1);
1497                 /* Read MSG_DONE for delay-updates phase & prior messages. */
1498                 get_redo_num(itemizing, code);
1499         }
1500
1501         do_progress = save_do_progress;
1502         if (delete_after && !local_name && flist->count > 0)
1503                 do_delete_pass(flist);
1504
1505         if ((need_retouch_dir_perms || need_retouch_dir_times) && dir_tweaking) {
1506                 int j = 0;
1507                 /* Now we need to fix any directory permissions that were
1508                  * modified during the transfer and/or re-set any tweaked
1509                  * modified-time values. */
1510                 for (i = 0; i < flist->count; i++) {
1511                         struct file_struct *file = flist->files[i];
1512
1513                         if (!file->basename || !S_ISDIR(file->mode))
1514                                 continue;
1515                         if (!need_retouch_dir_times && file->mode & S_IWUSR)
1516                                 continue;
1517                         if (file->flags & FLAG_MISSING) {
1518                                 int missing = file->dir.depth;
1519                                 while (++i < flist->count) {
1520                                         file = flist->files[i];
1521                                         if (file->dir.depth <= missing)
1522                                                 break;
1523                                 }
1524                                 i--;
1525                                 continue;
1526                         }
1527                         recv_generator(f_name(file, NULL), file, i, itemizing,
1528                                        maybe_ATTRS_REPORT, code, -1);
1529                         if (allowed_lull && !(++j % lull_mod))
1530                                 maybe_send_keepalive();
1531                         else if (!(j % 200))
1532                                 maybe_flush_socket();
1533                 }
1534         }
1535         recv_generator(NULL, NULL, 0, 0, 0, code, -1);
1536
1537         if (max_delete > 0 && deletion_count > max_delete) {
1538                 rprintf(FINFO,
1539                         "Deletions stopped due to --max-delete limit (%d skipped)\n",
1540                         deletion_count - max_delete);
1541                 io_error |= IOERR_DEL_LIMIT;
1542         }
1543
1544         if (verbose > 2)
1545                 rprintf(FINFO,"generate_files finished\n");
1546 }