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 int ignore_perishable = 0;
  97 int non_perishable_cnt = 0;
  98
  99 static int deletion_count = 0; /* used to implement --max-delete */
 100 static FILE *delete_delay_fp = NULL;
 101 static BOOL solo_file = 0;
 102
 103 /* For calling delete_item() and delete_dir_contents(). */
 104 #define DEL_RECURSE             (1<<1) /* recurse */
 105 #define DEL_DIR_IS_EMPTY        (1<<2) /* internal delete_FUNCTIONS use only */
 106
 107 enum nonregtype {
 108     TYPE_DIR, TYPE_SPECIAL, TYPE_DEVICE, TYPE_SYMLINK
 109 };
 110
 111 enum delret {
 112     DR_SUCCESS = 0, DR_FAILURE, DR_AT_LIMIT, DR_NOT_EMPTY
 113 };
 114
 115 /* Forward declaration for delete_item(). */
 116 static enum delret delete_dir_contents(char *fname, int flags);
 117
 118
 119 static int is_backup_file(char *fn)
 120 {
 121         int k = strlen(fn) - backup_suffix_len;
 122         return k > 0 && strcmp(fn+k, backup_suffix) == 0;
 123 }
 124
 125 /* Delete a file or directory.  If DEL_RECURSE is set in the flags, this will
 126  * delete recursively.
 127  *
 128  * Note that fbuf must point to a MAXPATHLEN buffer if the mode indicates it's
 129  * a directory! (The buffer is used for recursion, but returned unchanged.)
 130  */
 131 static enum delret delete_item(char *fbuf, int mode, char *replace, int flags)
 132 {
 133         enum delret ret;
 134         char *what;
 135         int ok;
 136
 137         if (verbose > 2) {
 138                 rprintf(FINFO, "delete_item(%s) mode=%o flags=%d\n",
 139                         fbuf, mode, flags);
 140         }
 141
 142         if (S_ISDIR(mode) && !(flags & DEL_DIR_IS_EMPTY)) {
 143                 ignore_perishable = 1;
 144                 /* If DEL_RECURSE is not set, this just reports emptiness. */
 145                 ret = delete_dir_contents(fbuf, flags);
 146                 ignore_perishable = 0;
 147                 if (ret == DR_NOT_EMPTY || ret == DR_AT_LIMIT)
 148                         goto check_ret;
 149                 /* OK: try to delete the directory. */
 150         }
 151
 152         if (!replace && max_delete >= 0 && ++deletion_count > max_delete)
 153                 return DR_AT_LIMIT;
 154
 155         if (S_ISDIR(mode)) {
 156                 what = "rmdir";
 157                 ok = do_rmdir(fbuf) == 0;
 158         } else if (make_backups && (backup_dir || !is_backup_file(fbuf))) {
 159                 what = "make_backup";
 160                 ok = make_backup(fbuf);
 161         } else {
 162                 what = "unlink";
 163                 ok = robust_unlink(fbuf) == 0;
 164         }
 165
 166         if (ok) {
 167                 if (!replace)
 168                         log_delete(fbuf, mode);
 169                 ret = DR_SUCCESS;
 170         } else {
 171                 if (S_ISDIR(mode) && errno == ENOTEMPTY) {
 172                         rprintf(FINFO, "cannot delete non-empty directory: %s\n",
 173                                 fbuf);
 174                         ret = DR_NOT_EMPTY;
 175                 } else if (errno != ENOENT) {
 176                         rsyserr(FERROR, errno, "delete_file: %s(%s) failed",
 177                                 what, fbuf);
 178                         ret = DR_FAILURE;
 179                 } else {
 180                         deletion_count--;
 181                         ret = DR_SUCCESS;
 182                 }
 183         }
 184
 185   check_ret:
 186         if (replace && ret != DR_SUCCESS) {
 187                 rprintf(FERROR, "could not make way for new %s: %s\n",
 188                         replace, fbuf);
 189         }
 190         return ret;
 191 }
 192
 193 /* The directory is about to be deleted: if DEL_RECURSE is given, delete all
 194  * its contents, otherwise just checks for content.  Returns DR_SUCCESS or
 195  * DR_NOT_EMPTY.  Note that fname must point to a MAXPATHLEN buffer!  (The
 196  * buffer is used for recursion, but returned unchanged.)
 197  */
 198 static enum delret delete_dir_contents(char *fname, int flags)
 199 {
 200         struct file_list *dirlist;
 201         enum delret ret;
 202         unsigned remainder;
 203         void *save_filters;
 204         int j, dlen;
 205         char *p;
 206
 207         if (verbose > 3) {
 208                 rprintf(FINFO, "delete_dir_contents(%s) flags=%d\n",
 209                         fname, flags);
 210         }
 211
 212         dlen = strlen(fname);
 213         save_filters = push_local_filters(fname, dlen);
 214
 215         non_perishable_cnt = 0;
 216         dirlist = get_dirlist(fname, dlen, 0);
 217         ret = non_perishable_cnt ? DR_NOT_EMPTY : DR_SUCCESS;
 218
 219         if (!dirlist->count)
 220                 goto done;
 221
 222         if (!(flags & DEL_RECURSE)) {
 223                 ret = DR_NOT_EMPTY;
 224                 goto done;
 225         }
 226
 227         p = fname + dlen;
 228         if (dlen != 1 || *fname != '/')
 229                 *p++ = '/';
 230         remainder = MAXPATHLEN - (p - fname);
 231
 232         /* We do our own recursion, so make delete_item() non-recursive. */
 233         flags = (flags & ~DEL_RECURSE) | DEL_DIR_IS_EMPTY;
 234
 235         for (j = dirlist->count; j--; ) {
 236                 struct file_struct *fp = dirlist->files[j];
 237
 238                 if (fp->flags & FLAG_MOUNT_DIR) {
 239                         if (verbose > 1) {
 240                                 rprintf(FINFO,
 241                                     "mount point, %s, pins parent directory\n",
 242                                     f_name(fp, NULL));
 243                         }
 244                         ret = DR_NOT_EMPTY;
 245                         continue;
 246                 }
 247
 248                 strlcpy(p, F_BASENAME(fp), remainder);
 249                 /* Save stack by recursing to ourself directly. */
 250                 if (S_ISDIR(fp->mode)
 251                  && delete_dir_contents(fname, flags | DEL_RECURSE) != DR_SUCCESS)
 252                         ret = DR_NOT_EMPTY;
 253                 if (delete_item(fname, fp->mode, NULL, flags) != DR_SUCCESS)
 254                         ret = DR_NOT_EMPTY;
 255         }
 256
 257         fname[dlen] = '\0';
 258
 259   done:
 260         flist_free(dirlist);
 261         pop_local_filters(save_filters);
 262
 263         if (ret == DR_NOT_EMPTY) {
 264                 rprintf(FINFO, "cannot delete non-empty directory: %s\n",
 265                         fname);
 266         }
 267         return ret;
 268 }
 269
 270 static void start_delete_temp(void)
 271 {
 272         char fnametmp[MAXPATHLEN];
 273         int fd, save_dry_run = dry_run;
 274
 275         dry_run = 0;
 276         if (!get_tmpname(fnametmp, "deldelay")
 277          || (fd = do_mkstemp(fnametmp, 0600)) < 0
 278          || !(delete_delay_fp = fdopen(fd, "w+"))) {
 279                 rprintf(FERROR, "Unable to create delete-delay temp file.\n");
 280                 exit_cleanup(RERR_FILEIO);
 281         }
 282         dry_run = save_dry_run;
 283         unlink(fnametmp);
 284 }
 285
 286 static int read_delay_line(FILE *fp, char *buf, int bsize)
 287 {
 288         int ch, mode = 0;
 289
 290         if ((ch = fgetc(fp)) == EOF)
 291                 return -1;
 292
 293         while (1) {
 294                 if (ch == ' ')
 295                         break;
 296                 if (ch > '7' || ch < '0') {
 297                         rprintf(FERROR, "invalid data in delete-delay file.\n");
 298                         exit_cleanup(RERR_FILEIO);
 299                 }
 300                 mode = mode*8 + ch - '0';
 301                 if ((ch = fgetc(fp)) == EOF) {
 302                   unexpected_eof:
 303                         rprintf(FERROR, "unexpected EOF in delete-delay file.\n");
 304                         exit_cleanup(RERR_FILEIO);
 305                 }
 306         }
 307
 308         while (1) {
 309                 if ((ch = fgetc(fp)) == EOF)
 310                         goto unexpected_eof;
 311                 if (bsize-- <= 0) {
 312                         rprintf(FERROR, "filename too long in delete-delay file.\n");
 313                         exit_cleanup(RERR_FILEIO);
 314                 }
 315                 *buf++ = (char)ch;
 316                 if (ch == '\0')
 317                         break;
 318         }
 319
 320         return mode;
 321 }
 322
 323 static void delayed_deletions(char *delbuf)
 324 {
 325         int mode;
 326
 327         fseek(delete_delay_fp, 0, 0);
 328         while ((mode = read_delay_line(delete_delay_fp, delbuf, MAXPATHLEN)) >= 0)
 329                 delete_item(delbuf, mode, NULL, DEL_RECURSE);
 330         fclose(delete_delay_fp);
 331 }
 332
 333 /* This function is used to implement per-directory deletion, and is used by
 334  * all the --delete-WHEN options.  Note that the fbuf pointer must point to a
 335  * MAXPATHLEN buffer with the name of the directory in it (the functions we
 336  * call will append names onto the end, but the old dir value will be restored
 337  * on exit). */
 338 static void delete_in_dir(struct file_list *flist, char *fbuf,
 339                           struct file_struct *file, STRUCT_STAT *stp)
 340 {
 341         static int min_depth = MAXPATHLEN, cur_depth = -1;
 342         static void *filt_array[MAXPATHLEN/2+1];
 343         static int already_warned = 0;
 344         struct file_list *dirlist;
 345         char delbuf[MAXPATHLEN];
 346         int dlen, i;
 347
 348         if (!flist) {
 349                 while (cur_depth >= min_depth)
 350                         pop_local_filters(filt_array[cur_depth--]);
 351                 min_depth = MAXPATHLEN;
 352                 cur_depth = -1;
 353                 return;
 354         }
 355
 356         if (verbose > 2)
 357                 rprintf(FINFO, "delete_in_dir(%s)\n", fbuf);
 358
 359         if (allowed_lull)
 360                 maybe_send_keepalive();
 361
 362         if (file->dir.depth >= MAXPATHLEN/2+1)
 363                 return; /* Impossible... */
 364
 365         if (io_error && !(lp_ignore_errors(module_id) || ignore_errors)) {
 366                 if (already_warned)
 367                         return;
 368                 rprintf(FINFO,
 369                         "IO error encountered -- skipping file deletion\n");
 370                 already_warned = 1;
 371                 return;
 372         }
 373
 374         while (cur_depth >= file->dir.depth && cur_depth >= min_depth)
 375                 pop_local_filters(filt_array[cur_depth--]);
 376         cur_depth = file->dir.depth;
 377         if (min_depth > cur_depth)
 378                 min_depth = cur_depth;
 379         dlen = strlen(fbuf);
 380         filt_array[cur_depth] = push_local_filters(fbuf, dlen);
 381
 382         if (one_file_system) {
 383                 if (file->flags & FLAG_TOP_DIR)
 384                         filesystem_dev = stp->st_dev;
 385                 else if (filesystem_dev != stp->st_dev)
 386                         return;
 387         }
 388
 389         dirlist = get_dirlist(fbuf, dlen, 0);
 390
 391         /* If an item in dirlist is not found in flist, delete it
 392          * from the filesystem. */
 393         for (i = dirlist->count; i--; ) {
 394                 struct file_struct *fp = dirlist->files[i];
 395                 if (!F_IS_ACTIVE(fp))
 396                         continue;
 397                 if (fp->flags & FLAG_MOUNT_DIR) {
 398                         if (verbose > 1)
 399                                 rprintf(FINFO, "cannot delete mount point: %s\n",
 400                                         f_name(fp, NULL));
 401                         continue;
 402                 }
 403                 if (flist_find(flist, fp) < 0) {
 404                         f_name(fp, delbuf);
 405                         if (delete_delay_fp)
 406                                 fprintf(delete_delay_fp, "%o %s%c", (short)fp->mode, delbuf, '\0');
 407                         else
 408                                 delete_item(delbuf, fp->mode, NULL, DEL_RECURSE);
 409                 }
 410         }
 411
 412         flist_free(dirlist);
 413 }
 414
 415 /* This deletes any files on the receiving side that are not present on the
 416  * sending side.  This is used by --delete-before and --delete-after. */
 417 static void do_delete_pass(struct file_list *flist)
 418 {
 419         char fbuf[MAXPATHLEN];
 420         STRUCT_STAT st;
 421         int j;
 422
 423         /* dry_run is incremented when the destination doesn't exist yet. */
 424         if (dry_run > 1 || list_only)
 425                 return;
 426
 427         for (j = 0; j < flist->count; j++) {
 428                 struct file_struct *file = flist->files[j];
 429
 430                 if (!(file->flags & FLAG_XFER_DIR))
 431                         continue;
 432
 433                 f_name(file, fbuf);
 434                 if (verbose > 1 && file->flags & FLAG_TOP_DIR)
 435                         rprintf(FINFO, "deleting in %s\n", fbuf);
 436
 437                 if (link_stat(fbuf, &st, keep_dirlinks) < 0
 438                  || !S_ISDIR(st.st_mode))
 439                         continue;
 440
 441                 delete_in_dir(flist, fbuf, file, &st);
 442         }
 443         delete_in_dir(NULL, NULL, NULL, NULL);
 444
 445         if (do_progress && !am_server)
 446                 rprintf(FINFO, "                    \r");
 447 }
 448
 449 int unchanged_attrs(struct file_struct *file, STRUCT_STAT *st)
 450 {
 451         if (preserve_perms
 452          && (st->st_mode & CHMOD_BITS) != (file->mode & CHMOD_BITS))
 453                 return 0;
 454
 455         if (am_root && preserve_uid && st->st_uid != F_UID(file))
 456                 return 0;
 457
 458         if (preserve_gid && F_GID(file) != GID_NONE && st->st_gid != F_GID(file))
 459                 return 0;
 460
 461         return 1;
 462 }
 463
 464 void itemize(struct file_struct *file, int ndx, int statret, STRUCT_STAT *st,
 465              int32 iflags, uchar fnamecmp_type, const char *xname)
 466 {
 467         if (statret >= 0) { /* A from-dest-dir statret can == 1! */
 468                 int keep_time = !preserve_times ? 0
 469                     : S_ISDIR(file->mode) ? !omit_dir_times
 470                     : !S_ISLNK(file->mode);
 471
 472                 if (S_ISREG(file->mode) && F_LENGTH(file) != st->st_size)
 473                         iflags |= ITEM_REPORT_SIZE;
 474                 if ((iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !keep_time
 475                   && !(iflags & ITEM_MATCHED)
 476                   && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
 477                  || (keep_time && cmp_time(file->modtime, st->st_mtime) != 0))
 478                         iflags |= ITEM_REPORT_TIME;
 479                 if ((file->mode & CHMOD_BITS) != (st->st_mode & CHMOD_BITS))
 480                         iflags |= ITEM_REPORT_PERMS;
 481                 if (preserve_uid && am_root && F_UID(file) != st->st_uid)
 482                         iflags |= ITEM_REPORT_OWNER;
 483                 if (preserve_gid && F_GID(file) != GID_NONE
 484                     && st->st_gid != F_GID(file))
 485                         iflags |= ITEM_REPORT_GROUP;
 486         } else
 487                 iflags |= ITEM_IS_NEW;
 488
 489         iflags &= 0xffff;
 490         if ((iflags & SIGNIFICANT_ITEM_FLAGS || verbose > 1
 491           || stdout_format_has_i > 1 || (xname && *xname)) && !read_batch) {
 492                 if (protocol_version >= 29) {
 493                         if (ndx >= 0)
 494                                 write_int(sock_f_out, ndx);
 495                         write_shortint(sock_f_out, iflags);
 496                         if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
 497                                 write_byte(sock_f_out, fnamecmp_type);
 498                         if (iflags & ITEM_XNAME_FOLLOWS)
 499                                 write_vstring(sock_f_out, xname, strlen(xname));
 500                 } else if (ndx >= 0) {
 501                         enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
 502                         log_item(code, file, &stats, iflags, xname);
 503                 }
 504         }
 505 }
 506
 507
 508 /* Perform our quick-check heuristic for determining if a file is unchanged. */
 509 int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
 510 {
 511         if (st->st_size != F_LENGTH(file))
 512                 return 0;
 513
 514         /* if always checksum is set then we use the checksum instead
 515            of the file time to determine whether to sync */
 516         if (always_checksum && S_ISREG(st->st_mode)) {
 517                 char sum[MD4_SUM_LENGTH];
 518                 file_checksum(fn, sum, st->st_size);
 519                 return memcmp(sum, F_SUM(file), checksum_len) == 0;
 520         }
 521
 522         if (size_only)
 523                 return 1;
 524
 525         if (ignore_times)
 526                 return 0;
 527
 528         return cmp_time(st->st_mtime, file->modtime) == 0;
 529 }
 530
 531
 532 /*
 533  * set (initialize) the size entries in the per-file sum_struct
 534  * calculating dynamic block and checksum sizes.
 535  *
 536  * This is only called from generate_and_send_sums() but is a separate
 537  * function to encapsulate the logic.
 538  *
 539  * The block size is a rounded square root of file length.
 540  *
 541  * The checksum size is determined according to:
 542  *     blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
 543  * provided by Donovan Baarda which gives a probability of rsync
 544  * algorithm corrupting data and falling back using the whole md4
 545  * checksums.
 546  *
 547  * This might be made one of several selectable heuristics.
 548  */
 549 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
 550 {
 551         int32 blength;
 552         int s2length;
 553
 554         if (block_size)
 555                 blength = block_size;
 556         else if (len <= BLOCK_SIZE * BLOCK_SIZE)
 557                 blength = BLOCK_SIZE;
 558         else {
 559                 int32 c;
 560                 int64 l;
 561                 int cnt;
 562                 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
 563                 if (cnt >= 31 || c >= MAX_BLOCK_SIZE)
 564                         blength = MAX_BLOCK_SIZE;
 565                 else {
 566                     blength = 0;
 567                     do {
 568                             blength |= c;
 569                             if (len < (int64)blength * blength)
 570                                     blength &= ~c;
 571                             c >>= 1;
 572                     } while (c >= 8);   /* round to multiple of 8 */
 573                     blength = MAX(blength, BLOCK_SIZE);
 574                 }
 575         }
 576
 577         if (protocol_version < 27) {
 578                 s2length = csum_length;
 579         } else if (csum_length == SUM_LENGTH) {
 580                 s2length = SUM_LENGTH;
 581         } else {
 582                 int32 c;
 583                 int64 l;
 584                 int b = BLOCKSUM_BIAS;
 585                 for (l = len; l >>= 1; b += 2) {}
 586                 for (c = blength; (c >>= 1) && b; b--) {}
 587                 /* add a bit, subtract rollsum, round up. */
 588                 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
 589                 s2length = MAX(s2length, csum_length);
 590                 s2length = MIN(s2length, SUM_LENGTH);
 591         }
 592
 593         sum->flength    = len;
 594         sum->blength    = blength;
 595         sum->s2length   = s2length;
 596         sum->remainder  = (int32)(len % blength);
 597         sum->count      = (int32)(len / blength) + (sum->remainder != 0);
 598
 599         if (sum->count && verbose > 2) {
 600                 rprintf(FINFO,
 601                         "count=%.0f rem=%ld blength=%ld s2length=%d flength=%.0f\n",
 602                         (double)sum->count, (long)sum->remainder, (long)sum->blength,
 603                         sum->s2length, (double)sum->flength);
 604         }
 605 }
 606
 607
 608 /*
 609  * Generate and send a stream of signatures/checksums that describe a buffer
 610  *
 611  * Generate approximately one checksum every block_len bytes.
 612  */
 613 static void generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
 614 {
 615         int32 i;
 616         struct map_struct *mapbuf;
 617         struct sum_struct sum;
 618         OFF_T offset = 0;
 619
 620         sum_sizes_sqroot(&sum, len);
 621         write_sum_head(f_out, &sum);
 622
 623         if (append_mode > 0 && f_copy < 0)
 624                 return;
 625
 626         if (len > 0)
 627                 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
 628         else
 629                 mapbuf = NULL;
 630
 631         for (i = 0; i < sum.count; i++) {
 632                 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
 633                 char *map = map_ptr(mapbuf, offset, n1);
 634                 char sum2[SUM_LENGTH];
 635                 uint32 sum1;
 636
 637                 len -= n1;
 638                 offset += n1;
 639
 640                 if (f_copy >= 0) {
 641                         full_write(f_copy, map, n1);
 642                         if (append_mode > 0)
 643                                 continue;
 644                 }
 645
 646                 sum1 = get_checksum1(map, n1);
 647                 get_checksum2(map, n1, sum2);
 648
 649                 if (verbose > 3) {
 650                         rprintf(FINFO,
 651                                 "chunk[%.0f] offset=%.0f len=%ld sum1=%08lx\n",
 652                                 (double)i, (double)offset - n1, (long)n1,
 653                                 (unsigned long)sum1);
 654                 }
 655                 write_int(f_out, sum1);
 656                 write_buf(f_out, sum2, sum.s2length);
 657         }
 658
 659         if (mapbuf)
 660                 unmap_file(mapbuf);
 661 }
 662
 663
 664 /* Try to find a filename in the same dir as "fname" with a similar name. */
 665 static int find_fuzzy(struct file_struct *file, struct file_list *dirlist)
 666 {
 667         int fname_len, fname_suf_len;
 668         const char *fname_suf, *fname = F_BASENAME(file);
 669         uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
 670         int j, lowest_j = -1;
 671
 672         fname_len = strlen(fname);
 673         fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
 674
 675         for (j = 0; j < dirlist->count; j++) {
 676                 struct file_struct *fp = dirlist->files[j];
 677                 const char *suf, *name;
 678                 int len, suf_len;
 679                 uint32 dist;
 680
 681                 if (!S_ISREG(fp->mode) || !F_LENGTH(fp) || fp->flags & FLAG_SENT)
 682                         continue;
 683
 684                 name = F_BASENAME(fp);
 685
 686                 if (F_LENGTH(fp) == F_LENGTH(file)
 687                     && cmp_time(fp->modtime, file->modtime) == 0) {
 688                         if (verbose > 4) {
 689                                 rprintf(FINFO,
 690                                         "fuzzy size/modtime match for %s\n",
 691                                         name);
 692                         }
 693                         return j;
 694                 }
 695
 696                 len = strlen(name);
 697                 suf = find_filename_suffix(name, len, &suf_len);
 698
 699                 dist = fuzzy_distance(name, len, fname, fname_len);
 700                 /* Add some extra weight to how well the suffixes match. */
 701                 dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len)
 702                       * 10;
 703                 if (verbose > 4) {
 704                         rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
 705                                 name, (int)(dist>>16), (int)(dist&0xFFFF));
 706                 }
 707                 if (dist <= lowest_dist) {
 708                         lowest_dist = dist;
 709                         lowest_j = j;
 710                 }
 711         }
 712
 713         return lowest_j;
 714 }
 715
 716 #ifdef SUPPORT_HARD_LINKS
 717 void check_for_finished_hlinks(int itemizing, enum logcode code)
 718 {
 719         struct file_struct *file;
 720         int ndx;
 721
 722         while ((ndx = get_hlink_num()) != -1) {
 723                 if (ndx < 0 || ndx >= the_file_list->count)
 724                         continue;
 725
 726                 file = the_file_list->files[ndx];
 727                 if (!F_IS_HLINKED(file))
 728                         continue;
 729
 730                 hard_link_cluster(file, ndx, itemizing, code, -1);
 731         }
 732 }
 733 #endif
 734
 735 /* This is only called for regular files.  We return -2 if we've finished
 736  * handling the file, -1 if no dest-linking occurred, or a non-negative
 737  * value if we found an alternate basis file. */
 738 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
 739                          char *cmpbuf, STRUCT_STAT *stp, int itemizing,
 740                          int maybe_ATTRS_REPORT, enum logcode code)
 741 {
 742         int best_match = -1;
 743         int match_level = 0;
 744         int j = 0;
 745
 746         do {
 747                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 748                 if (link_stat(cmpbuf, stp, 0) < 0 || !S_ISREG(stp->st_mode))
 749                         continue;
 750                 switch (match_level) {
 751                 case 0:
 752                         best_match = j;
 753                         match_level = 1;
 754                         /* FALL THROUGH */
 755                 case 1:
 756                         if (!unchanged_file(cmpbuf, file, stp))
 757                                 continue;
 758                         best_match = j;
 759                         match_level = 2;
 760                         /* FALL THROUGH */
 761                 case 2:
 762                         if (!unchanged_attrs(file, stp))
 763                                 continue;
 764                         if (always_checksum && preserve_times
 765                          && cmp_time(stp->st_mtime, file->modtime))
 766                                 continue;
 767                         best_match = j;
 768                         match_level = 3;
 769                         break;
 770                 }
 771                 break;
 772         } while (basis_dir[++j] != NULL);
 773
 774         if (!match_level)
 775                 return -1;
 776
 777         if (j != best_match) {
 778                 j = best_match;
 779                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 780                 if (link_stat(cmpbuf, stp, 0) < 0)
 781                         return -1;
 782         }
 783
 784         if (match_level == 3 && !copy_dest) {
 785 #ifdef SUPPORT_HARD_LINKS
 786                 if (link_dest) {
 787                         int i = itemizing && (verbose > 1 || stdout_format_has_i > 1);
 788                         if (hard_link_one(file, ndx, fname, 0, stp,
 789                                           cmpbuf, 1, i, code) < 0)
 790                                 goto try_a_copy;
 791                         if (preserve_hard_links && F_IS_HLINKED(file))
 792                                 hard_link_cluster(file, ndx, itemizing, code, j);
 793                 } else
 794 #endif
 795                 if (itemizing)
 796                         itemize(file, ndx, 0, stp, 0, 0, NULL);
 797                 if (verbose > 1 && maybe_ATTRS_REPORT) {
 798                         rprintf(FCLIENT, "%s is uptodate\n", fname);
 799                 }
 800                 return -2;
 801         }
 802
 803         if (match_level >= 2) {
 804           try_a_copy: /* Copy the file locally. */
 805                 if (copy_file(cmpbuf, fname, file->mode) < 0) {
 806                         if (verbose) {
 807                                 rsyserr(FINFO, errno, "copy_file %s => %s",
 808                                         full_fname(cmpbuf), fname);
 809                         }
 810                         return -1;
 811                 }
 812                 if (itemizing)
 813                         itemize(file, ndx, 0, stp, ITEM_LOCAL_CHANGE, 0, NULL);
 814                 set_file_attrs(fname, file, NULL, 0);
 815                 if (maybe_ATTRS_REPORT
 816                  && ((!itemizing && verbose && match_level == 2)
 817                   || (verbose > 1 && match_level == 3))) {
 818                         code = match_level == 3 ? FCLIENT : FINFO;
 819                         rprintf(code, "%s%s\n", fname,
 820                                 match_level == 3 ? " is uptodate" : "");
 821                 }
 822 #ifdef SUPPORT_HARD_LINKS
 823                 if (preserve_hard_links && F_IS_HLINKED(file))
 824                         hard_link_cluster(file, ndx, itemizing, code, j);
 825 #endif
 826                 return -2;
 827         }
 828
 829         return FNAMECMP_BASIS_DIR_LOW + j;
 830 }
 831
 832 /* This is only called for non-regular files.  We return -2 if we've finished
 833  * handling the file, or -1 if no dest-linking occurred, or a non-negative
 834  * value if we found an alternate basis file. */
 835 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
 836                          char *cmpbuf, STRUCT_STAT *stp, int itemizing,
 837                          int maybe_ATTRS_REPORT, enum logcode code)
 838 {
 839         char lnk[MAXPATHLEN];
 840         int best_match = -1;
 841         int match_level = 0;
 842         uint32 *devp;
 843         enum nonregtype type;
 844         int len, j = 0;
 845
 846 #ifndef SUPPORT_LINKS
 847         if (S_ISLNK(file->mode))
 848                 return -1;
 849 #endif
 850         if (S_ISDIR(file->mode)) {
 851                 type = TYPE_DIR;
 852         } else if (IS_SPECIAL(file->mode))
 853                 type = TYPE_SPECIAL;
 854         else if (IS_DEVICE(file->mode))
 855                 type = TYPE_DEVICE;
 856 #ifdef SUPPORT_LINKS
 857         else if (S_ISLNK(file->mode))
 858                 type = TYPE_SYMLINK;
 859 #endif
 860         else {
 861                 rprintf(FERROR,
 862                         "internal: try_dests_non() called with invalid mode (%o)\n",
 863                         (int)file->mode);
 864                 exit_cleanup(RERR_UNSUPPORTED);
 865         }
 866
 867         do {
 868                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 869                 if (link_stat(cmpbuf, stp, 0) < 0)
 870                         continue;
 871                 switch (type) {
 872                 case TYPE_DIR:
 873                         if (!S_ISDIR(stp->st_mode))
 874                                 continue;
 875                         break;
 876                 case TYPE_SPECIAL:
 877                         if (!IS_SPECIAL(stp->st_mode))
 878                                 continue;
 879                         break;
 880                 case TYPE_DEVICE:
 881                         if (!IS_DEVICE(stp->st_mode))
 882                                 continue;
 883                         break;
 884 #ifdef SUPPORT_LINKS
 885                 case TYPE_SYMLINK:
 886                         if (!S_ISLNK(stp->st_mode))
 887                                 continue;
 888                         break;
 889 #endif
 890                 }
 891                 if (match_level < 1) {
 892                         match_level = 1;
 893                         best_match = j;
 894                 }
 895                 switch (type) {
 896                 case TYPE_DIR:
 897                         break;
 898                 case TYPE_SPECIAL:
 899                 case TYPE_DEVICE:
 900                         devp = F_RDEV_P(file);
 901                         if (stp->st_rdev != MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)))
 902                                 continue;
 903                         break;
 904 #ifdef SUPPORT_LINKS
 905                 case TYPE_SYMLINK:
 906                         if ((len = readlink(cmpbuf, lnk, MAXPATHLEN-1)) <= 0)
 907                                 continue;
 908                         lnk[len] = '\0';
 909                         if (strcmp(lnk, F_SYMLINK(file)) != 0)
 910                                 continue;
 911                         break;
 912 #endif
 913                 }
 914                 if (match_level < 2) {
 915                         match_level = 2;
 916                         best_match = j;
 917                 }
 918                 if (unchanged_attrs(file, stp)) {
 919                         match_level = 3;
 920                         best_match = j;
 921                         break;
 922                 }
 923         } while (basis_dir[++j] != NULL);
 924
 925         if (!match_level)
 926                 return -1;
 927
 928         if (j != best_match) {
 929                 j = best_match;
 930                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 931                 if (link_stat(cmpbuf, stp, 0) < 0)
 932                         return -1;
 933         }
 934
 935         if (match_level == 3) {
 936 #ifdef SUPPORT_HARD_LINKS
 937                 if (link_dest
 938 #ifndef CAN_HARDLINK_SYMLINK
 939                  && !S_ISLNK(file->mode)
 940 #endif
 941 #ifndef CAN_HARDLINK_SPECIAL
 942                  && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
 943 #endif
 944                  && !S_ISDIR(file->mode)) {
 945                         if (do_link(cmpbuf, fname) < 0) {
 946                                 rsyserr(FERROR, errno,
 947                                         "failed to hard-link %s with %s",
 948                                         cmpbuf, fname);
 949                                 return j;
 950                         }
 951                         if (preserve_hard_links && F_IS_HLINKED(file))
 952                                 hard_link_cluster(file, ndx, itemizing, code, -1);
 953                 } else
 954 #endif
 955                         match_level = 2;
 956                 if (itemizing && stdout_format_has_i
 957                  && (verbose > 1 || stdout_format_has_i > 1)) {
 958                         int chg = compare_dest && type != TYPE_DIR ? 0
 959                             : ITEM_LOCAL_CHANGE
 960                              + (match_level == 3 ? ITEM_XNAME_FOLLOWS : 0);
 961                         char *lp = match_level == 3 ? "" : NULL;
 962                         itemize(file, ndx, 0, stp, chg + ITEM_MATCHED, 0, lp);
 963                 }
 964                 if (verbose > 1 && maybe_ATTRS_REPORT) {
 965                         rprintf(FCLIENT, "%s%s is uptodate\n",
 966                                 fname, type == TYPE_DIR ? "/" : "");
 967                 }
 968                 return -2;
 969         }
 970
 971         return j;
 972 }
 973
 974 static int phase = 0;
 975
 976 /* Acts on the_file_list->file's ndx'th item, whose name is fname.  If a dir,
 977  * make sure it exists, and has the right permissions/timestamp info.  For
 978  * all other non-regular files (symlinks, etc.) we create them here.  For
 979  * regular files that have changed, we try to find a basis file and then
 980  * start sending checksums.
 981  *
 982  * When fname is non-null, it must point to a MAXPATHLEN buffer!
 983  *
 984  * Note that f_out is set to -1 when doing final directory-permission and
 985  * modification-time repair. */
 986 static void recv_generator(char *fname, struct file_struct *file, int ndx,
 987                            int itemizing, int maybe_ATTRS_REPORT,
 988                            enum logcode code, int f_out)
 989 {
 990         static int missing_below = -1, excluded_below = -1;
 991         static const char *parent_dirname = "";
 992         static struct file_list *fuzzy_dirlist = NULL;
 993         static int need_fuzzy_dirlist = 0;
 994         struct file_struct *fuzzy_file = NULL;
 995         int fd = -1, f_copy = -1;
 996         STRUCT_STAT st, real_st, partial_st;
 997         struct file_struct *back_file = NULL;
 998         int statret, real_ret, stat_errno;
 999         char *fnamecmp, *partialptr, *backupptr = NULL;
1000         char fnamecmpbuf[MAXPATHLEN];
1001         uchar fnamecmp_type;
1002         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1003
1004         if (list_only)
1005                 return;
1006
1007         if (!fname) {
1008                 if (fuzzy_dirlist) {
1009                         flist_free(fuzzy_dirlist);
1010                         fuzzy_dirlist = NULL;
1011                 }
1012                 if (missing_below >= 0) {
1013                         if (dry_run)
1014                                 dry_run--;
1015                         missing_below = -1;
1016                 }
1017                 parent_dirname = "";
1018                 return;
1019         }
1020
1021         if (verbose > 2)
1022                 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
1023
1024         if (server_filter_list.head) {
1025                 if (excluded_below >= 0) {
1026                         if (file->dir.depth > excluded_below)
1027                                 goto skipping;
1028                         excluded_below = -1;
1029                 }
1030                 if (check_filter(&server_filter_list, fname,
1031                                  S_ISDIR(file->mode)) < 0) {
1032                         if (S_ISDIR(file->mode))
1033                                 excluded_below = file->dir.depth;
1034                   skipping:
1035                         if (verbose) {
1036                                 rprintf(FINFO,
1037                                         "skipping server-excluded file \"%s\"\n",
1038                                         fname);
1039                         }
1040                         return;
1041                 }
1042         }
1043
1044         if (missing_below >= 0) {
1045                 if (file->dir.depth <= missing_below) {
1046                         if (dry_run)
1047                                 dry_run--;
1048                         missing_below = -1;
1049                 } else if (!dry_run)
1050                         return;
1051         }
1052         if (dry_run > 1) {
1053                 statret = -1;
1054                 stat_errno = ENOENT;
1055         } else {
1056                 const char *dn = file->dirname ? file->dirname : ".";
1057                 if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
1058                         if (relative_paths && !implied_dirs
1059                          && do_stat(dn, &st) < 0
1060                          && create_directory_path(fname) < 0) {
1061                                 rsyserr(FERROR, errno,
1062                                         "recv_generator: mkdir %s failed",
1063                                         full_fname(dn));
1064                         }
1065                         if (fuzzy_dirlist) {
1066                                 flist_free(fuzzy_dirlist);
1067                                 fuzzy_dirlist = NULL;
1068                         }
1069                         if (fuzzy_basis)
1070                                 need_fuzzy_dirlist = 1;
1071                 }
1072                 parent_dirname = dn;
1073
1074                 if (need_fuzzy_dirlist && S_ISREG(file->mode)) {
1075                         strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf);
1076                         fuzzy_dirlist = get_dirlist(fnamecmpbuf, -1, 1);
1077                         need_fuzzy_dirlist = 0;
1078                 }
1079
1080                 statret = link_stat(fname, &st,
1081                                     keep_dirlinks && S_ISDIR(file->mode));
1082                 stat_errno = errno;
1083         }
1084
1085         if (ignore_non_existing && statret == -1 && stat_errno == ENOENT) {
1086                 if (verbose > 1) {
1087                         rprintf(FINFO, "not creating new %s \"%s\"\n",
1088                                 S_ISDIR(file->mode) ? "directory" : "file",
1089                                 fname);
1090                 }
1091                 return;
1092         }
1093
1094         /* If we're not preserving permissions, change the file-list's
1095          * mode based on the local permissions and some heuristics. */
1096         if (!preserve_perms) {
1097                 int exists = statret == 0
1098                           && S_ISDIR(st.st_mode) == S_ISDIR(file->mode);
1099                 file->mode = dest_mode(file->mode, st.st_mode, exists);
1100         }
1101
1102         if (S_ISDIR(file->mode)) {
1103                 /* The file to be received is a directory, so we need
1104                  * to prepare appropriately.  If there is already a
1105                  * file of that name and it is *not* a directory, then
1106                  * we need to delete it.  If it doesn't exist, then
1107                  * (perhaps recursively) create it. */
1108                 if (statret == 0 && !S_ISDIR(st.st_mode)) {
1109                         if (delete_item(fname, st.st_mode, "directory", del_opts) != 0)
1110                                 return;
1111                         statret = -1;
1112                 }
1113                 if (dry_run && statret != 0 && missing_below < 0) {
1114                         missing_below = file->dir.depth;
1115                         dry_run++;
1116                 }
1117                 real_ret = statret;
1118                 real_st = st;
1119                 if (new_root_dir) {
1120                         if (*fname == '.' && fname[1] == '\0')
1121                                 statret = -1;
1122                         new_root_dir = 0;
1123                 }
1124                 if (statret != 0 && basis_dir[0] != NULL) {
1125                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &st,
1126                                               itemizing, maybe_ATTRS_REPORT, code);
1127                         if (j == -2) {
1128                                 itemizing = 0;
1129                                 code = FNONE;
1130                         } else if (j >= 0)
1131                                 statret = 1;
1132                 }
1133                 if (itemizing && f_out != -1) {
1134                         itemize(file, ndx, statret, &st,
1135                                 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
1136                 }
1137                 if (real_ret != 0 && do_mkdir(fname,file->mode) < 0 && errno != EEXIST) {
1138                         if (!relative_paths || errno != ENOENT
1139                             || create_directory_path(fname) < 0
1140                             || (do_mkdir(fname, file->mode) < 0 && errno != EEXIST)) {
1141                                 rsyserr(FERROR, errno,
1142                                         "recv_generator: mkdir %s failed",
1143                                         full_fname(fname));
1144                                 file->flags |= FLAG_MISSING_DIR;
1145                                 if (ndx+1 < the_file_list->count
1146                                  && the_file_list->files[ndx+1]->dir.depth > file->dir.depth) {
1147                                         rprintf(FERROR,
1148                                             "*** Skipping everything below this failed directory ***\n");
1149                                         missing_below = file->dir.depth;
1150                                 }
1151                                 return;
1152                         }
1153                 }
1154                 if (set_file_attrs(fname, file, real_ret ? NULL : &real_st, 0)
1155                     && verbose && code != FNONE && f_out != -1)
1156                         rprintf(code, "%s/\n", fname);
1157                 if (real_ret != 0 && one_file_system)
1158                         real_st.st_dev = filesystem_dev;
1159                 if (delete_during && f_out != -1 && !phase && dry_run < 2
1160                     && (file->flags & FLAG_XFER_DIR))
1161                         delete_in_dir(the_file_list, fname, file, &real_st);
1162                 return;
1163         }
1164
1165 #ifdef SUPPORT_HARD_LINKS
1166         if (preserve_hard_links && F_IS_HLINKED(file)
1167             && hard_link_check(file, ndx, fname, statret, &st,
1168                                itemizing, code, HL_CHECK_MASTER))
1169                 return;
1170 #endif
1171
1172         if (preserve_links && S_ISLNK(file->mode)) {
1173 #ifdef SUPPORT_LINKS
1174                 const char *sl = F_SYMLINK(file);
1175                 if (safe_symlinks && unsafe_symlink(sl, fname)) {
1176                         if (verbose) {
1177                                 if (solo_file)
1178                                         fname = f_name(file, NULL);
1179                                 rprintf(FINFO,
1180                                         "ignoring unsafe symlink %s -> \"%s\"\n",
1181                                         full_fname(fname), sl);
1182                         }
1183                         return;
1184                 }
1185                 if (statret == 0) {
1186                         char lnk[MAXPATHLEN];
1187                         int len;
1188
1189                         if (!S_ISLNK(st.st_mode))
1190                                 statret = -1;
1191                         else if ((len = readlink(fname, lnk, MAXPATHLEN-1)) > 0
1192                               && strncmp(lnk, sl, len) == 0 && sl[len] == '\0') {
1193                                 /* The link is pointing to the right place. */
1194                                 if (itemizing)
1195                                         itemize(file, ndx, 0, &st, 0, 0, NULL);
1196                                 set_file_attrs(fname, file, &st, maybe_ATTRS_REPORT);
1197 #ifdef SUPPORT_HARD_LINKS
1198                                 if (preserve_hard_links && F_IS_HLINKED(file))
1199                                         hard_link_cluster(file, ndx, itemizing, code, -1);
1200 #endif
1201                                 if (remove_source_files == 1)
1202                                         goto return_with_success;
1203                                 return;
1204                         }
1205                         /* Not the right symlink (or not a symlink), so
1206                          * delete it. */
1207                         if (delete_item(fname, st.st_mode, "symlink", del_opts) != 0)
1208                                 return;
1209                 } else if (basis_dir[0] != NULL) {
1210                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &st,
1211                                               itemizing, maybe_ATTRS_REPORT, code);
1212                         if (j == -2) {
1213 #ifndef CAN_HARDLINK_SYMLINK
1214                                 if (link_dest) {
1215                                         /* Resort to --copy-dest behavior. */
1216                                 } else
1217 #endif
1218                                 if (!copy_dest)
1219                                         return;
1220                                 itemizing = 0;
1221                                 code = FNONE;
1222                         } else if (j >= 0)
1223                                 statret = 1;
1224                 }
1225 #ifdef SUPPORT_HARD_LINKS
1226                 if (preserve_hard_links && F_IS_HLINKED(file)
1227                     && hard_link_check(file, ndx, fname, -1, &st,
1228                                        itemizing, code, HL_SKIP))
1229                         return;
1230 #endif
1231                 if (do_symlink(sl, fname) != 0) {
1232                         rsyserr(FERROR, errno, "symlink %s -> \"%s\" failed",
1233                                 full_fname(fname), sl);
1234                 } else {
1235                         set_file_attrs(fname, file, NULL, 0);
1236                         if (itemizing) {
1237                                 itemize(file, ndx, statret, &st,
1238                                         ITEM_LOCAL_CHANGE, 0, NULL);
1239                         }
1240                         if (code != FNONE && verbose)
1241                                 rprintf(code, "%s -> %s\n", fname, sl);
1242 #ifdef SUPPORT_HARD_LINKS
1243                         if (preserve_hard_links && F_IS_HLINKED(file))
1244                                 hard_link_cluster(file, ndx, itemizing, code, -1);
1245 #endif
1246                         /* This does not check remove_source_files == 1
1247                          * because this is one of the items that the old
1248                          * --remove-sent-files option would remove. */
1249                         if (remove_source_files)
1250                                 goto return_with_success;
1251                 }
1252 #endif
1253                 return;
1254         }
1255
1256         if ((am_root && preserve_devices && IS_DEVICE(file->mode))
1257          || (preserve_specials && IS_SPECIAL(file->mode))) {
1258                 uint32 *devp = F_RDEV_P(file);
1259                 dev_t rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
1260                 if (statret == 0) {
1261                         char *t;
1262                         if (IS_DEVICE(file->mode)) {
1263                                 if (!IS_DEVICE(st.st_mode))
1264                                         statret = -1;
1265                                 t = "device file";
1266                         } else {
1267                                 if (!IS_SPECIAL(st.st_mode))
1268                                         statret = -1;
1269                                 t = "special file";
1270                         }
1271                         if (statret == 0
1272                          && (st.st_mode & ~CHMOD_BITS) == (file->mode & ~CHMOD_BITS)
1273                          && st.st_rdev == rdev) {
1274                                 /* The device or special file is identical. */
1275                                 if (itemizing)
1276                                         itemize(file, ndx, 0, &st, 0, 0, NULL);
1277                                 set_file_attrs(fname, file, &st, maybe_ATTRS_REPORT);
1278 #ifdef SUPPORT_HARD_LINKS
1279                                 if (preserve_hard_links && F_IS_HLINKED(file))
1280                                         hard_link_cluster(file, ndx, itemizing, code, -1);
1281 #endif
1282                                 if (remove_source_files == 1)
1283                                         goto return_with_success;
1284                                 return;
1285                         }
1286                         if (delete_item(fname, st.st_mode, t, del_opts) != 0)
1287                                 return;
1288                 } else if (basis_dir[0] != NULL) {
1289                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &st,
1290                                               itemizing, maybe_ATTRS_REPORT, code);
1291                         if (j == -2) {
1292 #ifndef CAN_HARDLINK_SPECIAL
1293                                 if (link_dest) {
1294                                         /* Resort to --copy-dest behavior. */
1295                                 } else
1296 #endif
1297                                 if (!copy_dest)
1298                                         return;
1299                                 itemizing = 0;
1300                                 code = FNONE;
1301                         } else if (j >= 0)
1302                                 statret = 1;
1303                 }
1304 #ifdef SUPPORT_HARD_LINKS
1305                 if (preserve_hard_links && F_IS_HLINKED(file)
1306                     && hard_link_check(file, ndx, fname, -1, &st,
1307                                        itemizing, code, HL_SKIP))
1308                         return;
1309 #endif
1310                 if (verbose > 2) {
1311                         rprintf(FINFO, "mknod(%s, 0%o, [%ld,%ld])\n",
1312                                 fname, (int)file->mode,
1313                                 (long)major(rdev), (long)minor(rdev));
1314                 }
1315                 if (do_mknod(fname, file->mode, rdev) < 0) {
1316                         rsyserr(FERROR, errno, "mknod %s failed",
1317                                 full_fname(fname));
1318                 } else {
1319                         set_file_attrs(fname, file, NULL, 0);
1320                         if (itemizing) {
1321                                 itemize(file, ndx, statret, &st,
1322                                         ITEM_LOCAL_CHANGE, 0, NULL);
1323                         }
1324                         if (code != FNONE && verbose)
1325                                 rprintf(code, "%s\n", fname);
1326 #ifdef SUPPORT_HARD_LINKS
1327                         if (preserve_hard_links && F_IS_HLINKED(file))
1328                                 hard_link_cluster(file, ndx, itemizing, code, -1);
1329 #endif
1330                         if (remove_source_files == 1)
1331                                 goto return_with_success;
1332                 }
1333                 return;
1334         }
1335
1336         if (!S_ISREG(file->mode)) {
1337                 if (solo_file)
1338                         fname = f_name(file, NULL);
1339                 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1340                 return;
1341         }
1342
1343         if (max_size && F_LENGTH(file) > max_size) {
1344                 if (verbose > 1) {
1345                         if (solo_file)
1346                                 fname = f_name(file, NULL);
1347                         rprintf(FINFO, "%s is over max-size\n", fname);
1348                 }
1349                 return;
1350         }
1351         if (min_size && F_LENGTH(file) < min_size) {
1352                 if (verbose > 1) {
1353                         if (solo_file)
1354                                 fname = f_name(file, NULL);
1355                         rprintf(FINFO, "%s is under min-size\n", fname);
1356                 }
1357                 return;
1358         }
1359
1360         if (ignore_existing && statret == 0) {
1361                 if (verbose > 1)
1362                         rprintf(FINFO, "%s exists\n", fname);
1363                 return;
1364         }
1365
1366         if (update_only && statret == 0
1367             && cmp_time(st.st_mtime, file->modtime) > 0) {
1368                 if (verbose > 1)
1369                         rprintf(FINFO, "%s is newer\n", fname);
1370                 return;
1371         }
1372
1373         fnamecmp = fname;
1374         fnamecmp_type = FNAMECMP_FNAME;
1375
1376         if (statret == 0 && !S_ISREG(st.st_mode)) {
1377                 if (delete_item(fname, st.st_mode, "regular file", del_opts) != 0)
1378                         return;
1379                 statret = -1;
1380                 stat_errno = ENOENT;
1381         }
1382
1383         if (statret != 0 && basis_dir[0] != NULL) {
1384                 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &st,
1385                                       itemizing, maybe_ATTRS_REPORT, code);
1386                 if (j == -2) {
1387                         if (remove_source_files == 1)
1388                                 goto return_with_success;
1389                         return;
1390                 }
1391                 if (j >= 0) {
1392                         fnamecmp = fnamecmpbuf;
1393                         fnamecmp_type = j;
1394                         statret = 0;
1395                 }
1396         }
1397
1398         real_ret = statret;
1399         real_st = st;
1400
1401         if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1402             && link_stat(partialptr, &partial_st, 0) == 0
1403             && S_ISREG(partial_st.st_mode)) {
1404                 if (statret != 0)
1405                         goto prepare_to_open;
1406         } else
1407                 partialptr = NULL;
1408
1409         if (statret != 0 && fuzzy_dirlist && dry_run <= 1) {
1410                 int j = find_fuzzy(file, fuzzy_dirlist);
1411                 if (j >= 0) {
1412                         fuzzy_file = fuzzy_dirlist->files[j];
1413                         f_name(fuzzy_file, fnamecmpbuf);
1414                         if (verbose > 2) {
1415                                 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1416                                         fname, fnamecmpbuf);
1417                         }
1418                         st.st_size = F_LENGTH(fuzzy_file);
1419                         statret = 0;
1420                         fnamecmp = fnamecmpbuf;
1421                         fnamecmp_type = FNAMECMP_FUZZY;
1422                 }
1423         }
1424
1425         if (statret != 0) {
1426 #ifdef SUPPORT_HARD_LINKS
1427                 if (preserve_hard_links && F_IS_HLINKED(file)
1428                     && hard_link_check(file, ndx, fname, statret, &st,
1429                                        itemizing, code, HL_SKIP))
1430                         return;
1431 #endif
1432                 if (stat_errno == ENOENT)
1433                         goto notify_others;
1434                 rsyserr(FERROR, stat_errno, "recv_generator: failed to stat %s",
1435                         full_fname(fname));
1436                 return;
1437         }
1438
1439         if (append_mode && st.st_size > F_LENGTH(file))
1440                 return;
1441
1442         if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1443                 ;
1444         else if (fnamecmp_type == FNAMECMP_FUZZY)
1445                 ;
1446         else if (unchanged_file(fnamecmp, file, &st)) {
1447                 if (partialptr) {
1448                         do_unlink(partialptr);
1449                         handle_partial_dir(partialptr, PDIR_DELETE);
1450                 }
1451                 if (itemizing) {
1452                         itemize(file, ndx, real_ret, &real_st,
1453                                 0, 0, NULL);
1454                 }
1455                 set_file_attrs(fname, file, &st, maybe_ATTRS_REPORT);
1456 #ifdef SUPPORT_HARD_LINKS
1457                 if (preserve_hard_links && F_IS_HLINKED(file))
1458                         hard_link_cluster(file, ndx, itemizing, code, -1);
1459 #endif
1460                 if (remove_source_files != 1)
1461                         return;
1462           return_with_success:
1463                 if (!dry_run)
1464                         send_msg_int(MSG_SUCCESS, ndx);
1465                 return;
1466         }
1467
1468   prepare_to_open:
1469         if (partialptr) {
1470                 st = partial_st;
1471                 fnamecmp = partialptr;
1472                 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1473                 statret = 0;
1474         }
1475
1476         if (!do_xfers || read_batch || whole_file)
1477                 goto notify_others;
1478
1479         if (fuzzy_dirlist) {
1480                 int j = flist_find(fuzzy_dirlist, file);
1481                 if (j >= 0) /* don't use changing file as future fuzzy basis */
1482                         fuzzy_dirlist->files[j]->flags |= FLAG_SENT;
1483         }
1484
1485         /* open the file */
1486         fd = do_open(fnamecmp, O_RDONLY, 0);
1487
1488         if (fd == -1) {
1489                 rsyserr(FERROR, errno, "failed to open %s, continuing",
1490                         full_fname(fnamecmp));
1491           pretend_missing:
1492                 /* pretend the file didn't exist */
1493 #ifdef SUPPORT_HARD_LINKS
1494                 if (preserve_hard_links && F_IS_HLINKED(file)
1495                     && hard_link_check(file, ndx, fname, statret, &st,
1496                                        itemizing, code, HL_SKIP))
1497                         return;
1498 #endif
1499                 statret = real_ret = -1;
1500                 goto notify_others;
1501         }
1502
1503         if (inplace && make_backups && fnamecmp_type == FNAMECMP_FNAME) {
1504                 if (!(backupptr = get_backup_name(fname))) {
1505                         close(fd);
1506                         return;
1507                 }
1508                 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1509                         close(fd);
1510                         goto pretend_missing;
1511                 }
1512                 if (robust_unlink(backupptr) && errno != ENOENT) {
1513                         rsyserr(FERROR, errno, "unlink %s",
1514                                 full_fname(backupptr));
1515                         unmake_file(back_file);
1516                         close(fd);
1517                         return;
1518                 }
1519                 if ((f_copy = do_open(backupptr,
1520                     O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1521                         rsyserr(FERROR, errno, "open %s",
1522                                 full_fname(backupptr));
1523                         unmake_file(back_file);
1524                         close(fd);
1525                         return;
1526                 }
1527                 fnamecmp_type = FNAMECMP_BACKUP;
1528         }
1529
1530         if (verbose > 3) {
1531                 rprintf(FINFO, "gen mapped %s of size %.0f\n",
1532                         fnamecmp, (double)st.st_size);
1533         }
1534
1535         if (verbose > 2)
1536                 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1537
1538   notify_others:
1539         if (remove_source_files && !delay_updates && !phase)
1540                 increment_active_files(ndx, itemizing, code);
1541         write_int(f_out, ndx);
1542         if (itemizing) {
1543                 int iflags = ITEM_TRANSFER;
1544                 if (always_checksum)
1545                         iflags |= ITEM_REPORT_CHECKSUM;
1546                 if (fnamecmp_type != FNAMECMP_FNAME)
1547                         iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1548                 if (fnamecmp_type == FNAMECMP_FUZZY)
1549                         iflags |= ITEM_XNAME_FOLLOWS;
1550                 itemize(file, -1, real_ret, &real_st, iflags, fnamecmp_type,
1551                         fuzzy_file ? F_BASENAME(fuzzy_file) : NULL);
1552         }
1553
1554         if (!do_xfers) {
1555 #ifdef SUPPORT_HARD_LINKS
1556                 if (preserve_hard_links && F_IS_HLINKED(file))
1557                         hard_link_cluster(file, ndx, itemizing, code, -1);
1558 #endif
1559                 return;
1560         }
1561         if (read_batch)
1562                 return;
1563
1564         if (statret != 0 || whole_file) {
1565                 write_sum_head(f_out, NULL);
1566                 return;
1567         }
1568
1569         generate_and_send_sums(fd, st.st_size, f_out, f_copy);
1570
1571         if (f_copy >= 0) {
1572                 close(f_copy);
1573                 set_file_attrs(backupptr, back_file, NULL, 0);
1574                 if (verbose > 1) {
1575                         rprintf(FINFO, "backed up %s to %s\n",
1576                                 fname, backupptr);
1577                 }
1578                 unmake_file(back_file);
1579         }
1580
1581         close(fd);
1582 }
1583
1584 void generate_files(int f_out, struct file_list *flist, char *local_name)
1585 {
1586         int i;
1587         char fbuf[MAXPATHLEN];
1588         int itemizing, maybe_ATTRS_REPORT;
1589         enum logcode code;
1590         int lull_mod = allowed_lull * 5;
1591         int need_retouch_dir_times = preserve_times && !omit_dir_times;
1592         int need_retouch_dir_perms = 0;
1593         int save_ignore_existing = ignore_existing;
1594         int save_ignore_non_existing = ignore_non_existing;
1595         int save_do_progress = do_progress;
1596         int save_make_backups = make_backups;
1597         int dir_tweaking = !(list_only || local_name || dry_run);
1598
1599         if (protocol_version >= 29) {
1600                 itemizing = 1;
1601                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
1602                 code = logfile_format_has_i ? FNONE : FLOG;
1603         } else if (am_daemon) {
1604                 itemizing = logfile_format_has_i && do_xfers;
1605                 maybe_ATTRS_REPORT = ATTRS_REPORT;
1606                 code = itemizing || !do_xfers ? FCLIENT : FINFO;
1607         } else if (!am_server) {
1608                 itemizing = stdout_format_has_i;
1609                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
1610                 code = itemizing ? FNONE : FINFO;
1611         } else {
1612                 itemizing = 0;
1613                 maybe_ATTRS_REPORT = ATTRS_REPORT;
1614                 code = FINFO;
1615         }
1616         solo_file = local_name != NULL;
1617
1618         if (verbose > 2) {
1619                 rprintf(FINFO, "generator starting pid=%ld count=%d\n",
1620                         (long)getpid(), flist->count);
1621         }
1622
1623         if (delete_before && !local_name && flist->count > 0)
1624                 do_delete_pass(flist);
1625         if (delete_during == 2)
1626                 start_delete_temp();
1627         do_progress = 0;
1628
1629         if (append_mode || whole_file < 0)
1630                 whole_file = 0;
1631         if (verbose >= 2) {
1632                 rprintf(FINFO, "delta-transmission %s\n",
1633                         whole_file
1634                         ? "disabled for local transfer or --whole-file"
1635                         : "enabled");
1636         }
1637
1638         /* Since we often fill up the outgoing socket and then just sit around
1639          * waiting for the other 2 processes to do their thing, we don't want
1640          * to exit on a timeout.  If the data stops flowing, the receiver will
1641          * notice that and let us know via the redo pipe (or its closing). */
1642         ignore_timeout = 1;
1643
1644         for (i = 0; i < flist->count; i++) {
1645                 struct file_struct *file = flist->files[i];
1646
1647                 if (!F_IS_ACTIVE(file))
1648                         continue;
1649
1650                 if (local_name)
1651                         strlcpy(fbuf, local_name, sizeof fbuf);
1652                 else
1653                         f_name(file, fbuf);
1654                 recv_generator(fbuf, file, i, itemizing, maybe_ATTRS_REPORT,
1655                                code, f_out);
1656
1657                 /* We need to ensure that any dirs we create have writeable
1658                  * permissions during the time we are putting files within
1659                  * them.  This is then fixed after the transfer is done. */
1660 #ifdef HAVE_CHMOD
1661                 if (!am_root && S_ISDIR(file->mode) && !(file->mode & S_IWUSR)
1662                  && dir_tweaking) {
1663                         mode_t mode = file->mode | S_IWUSR; /* user write */
1664                         char *fname = local_name ? local_name : fbuf;
1665                         if (do_chmod(fname, mode) < 0) {
1666                                 rsyserr(FERROR, errno,
1667                                         "failed to modify permissions on %s",
1668                                         full_fname(fname));
1669                         }
1670                         need_retouch_dir_perms = 1;
1671                 }
1672 #endif
1673
1674 #ifdef SUPPORT_HARD_LINKS
1675                 if (preserve_hard_links)
1676                         check_for_finished_hlinks(itemizing, code);
1677 #endif
1678
1679                 if (allowed_lull && !(i % lull_mod))
1680                         maybe_send_keepalive();
1681                 else if (!(i % 200))
1682                         maybe_flush_socket();
1683         }
1684         recv_generator(NULL, NULL, 0, 0, 0, code, -1);
1685         if (delete_during)
1686                 delete_in_dir(NULL, NULL, NULL, NULL);
1687
1688         phase++;
1689         csum_length = SUM_LENGTH;
1690         max_size = min_size = ignore_existing = ignore_non_existing = 0;
1691         update_only = always_checksum = size_only = 0;
1692         ignore_times = 1;
1693         if (append_mode)  /* resend w/o append mode */
1694                 append_mode = -1; /* ... but only longer files */
1695         make_backups = 0; /* avoid a duplicate backup for inplace processing */
1696
1697         if (verbose > 2)
1698                 rprintf(FINFO, "generate_files phase=%d\n", phase);
1699
1700         write_int(f_out, NDX_DONE);
1701
1702         /* files can cycle through the system more than once
1703          * to catch initial checksum errors */
1704         while ((i = get_redo_num(itemizing, code)) != -1) {
1705                 struct file_struct *file = flist->files[i];
1706                 if (local_name)
1707                         strlcpy(fbuf, local_name, sizeof fbuf);
1708                 else
1709                         f_name(file, fbuf);
1710                 recv_generator(fbuf, file, i, itemizing, maybe_ATTRS_REPORT,
1711                                code, f_out);
1712         }
1713
1714         phase++;
1715         ignore_non_existing = save_ignore_non_existing;
1716         ignore_existing = save_ignore_existing;
1717         make_backups = save_make_backups;
1718
1719         if (verbose > 2)
1720                 rprintf(FINFO, "generate_files phase=%d\n", phase);
1721
1722         write_int(f_out, NDX_DONE);
1723         /* Reduce round-trip lag-time for a useless delay-updates phase. */
1724         if (protocol_version >= 29 && !delay_updates)
1725                 write_int(f_out, NDX_DONE);
1726
1727         /* Read MSG_DONE for the redo phase (and any prior messages). */
1728         get_redo_num(itemizing, code);
1729
1730         if (protocol_version >= 29) {
1731                 phase++;
1732                 if (verbose > 2)
1733                         rprintf(FINFO, "generate_files phase=%d\n", phase);
1734                 if (delay_updates)
1735                         write_int(f_out, NDX_DONE);
1736                 /* Read MSG_DONE for delay-updates phase & prior messages. */
1737                 get_redo_num(itemizing, code);
1738         }
1739
1740         do_progress = save_do_progress;
1741         if (delete_delay_fp)
1742                 delayed_deletions(fbuf);
1743         if (delete_after && !local_name && flist->count > 0)
1744                 do_delete_pass(flist);
1745
1746         if ((need_retouch_dir_perms || need_retouch_dir_times) && dir_tweaking) {
1747                 int j = 0;
1748                 /* Now we need to fix any directory permissions that were
1749                  * modified during the transfer and/or re-set any tweaked
1750                  * modified-time values. */
1751                 for (i = 0; i < flist->count; i++) {
1752                         struct file_struct *file = flist->files[i];
1753                         if (!F_IS_ACTIVE(file) || !S_ISDIR(file->mode))
1754                                 continue;
1755                         if (!need_retouch_dir_times && file->mode & S_IWUSR)
1756                                 continue;
1757                         if (file->flags & FLAG_MISSING_DIR) {
1758                                 int missing = file->dir.depth;
1759                                 while (++i < flist->count) {
1760                                         file = flist->files[i];
1761                                         if (file->dir.depth <= missing)
1762                                                 break;
1763                                 }
1764                                 i--;
1765                                 continue;
1766                         }
1767                         recv_generator(f_name(file, NULL), file, i, itemizing,
1768                                        maybe_ATTRS_REPORT, code, -1);
1769                         if (allowed_lull && !(++j % lull_mod))
1770                                 maybe_send_keepalive();
1771                         else if (!(j % 200))
1772                                 maybe_flush_socket();
1773                 }
1774         }
1775         recv_generator(NULL, NULL, 0, 0, 0, code, -1);
1776
1777         if (max_delete >= 0 && deletion_count > max_delete) {
1778                 rprintf(FINFO,
1779                         "Deletions stopped due to --max-delete limit (%d skipped)\n",
1780                         deletion_count - max_delete);
1781                 io_error |= IOERR_DEL_LIMIT;
1782         }
1783
1784         if (verbose > 2)
1785                 rprintf(FINFO, "generate_files finished\n");
1786 }