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) 2003-2007 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 3 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, visit the http://fsf.org website.
  21  */
  22
  23 #include "rsync.h"
  24
  25 extern int verbose;
  26 extern int dry_run;
  27 extern int do_xfers;
  28 extern int stdout_format_has_i;
  29 extern int logfile_format_has_i;
  30 extern int receiver_symlink_times;
  31 extern int am_root;
  32 extern int am_server;
  33 extern int am_daemon;
  34 extern int inc_recurse;
  35 extern int do_progress;
  36 extern int relative_paths;
  37 extern int implied_dirs;
  38 extern int keep_dirlinks;
  39 extern int preserve_acls;
  40 extern int preserve_xattrs;
  41 extern int preserve_links;
  42 extern int preserve_devices;
  43 extern int preserve_specials;
  44 extern int preserve_hard_links;
  45 extern int preserve_executability;
  46 extern int preserve_perms;
  47 extern int preserve_times;
  48 extern int uid_ndx;
  49 extern int gid_ndx;
  50 extern int delete_mode;
  51 extern int delete_before;
  52 extern int delete_during;
  53 extern int delete_after;
  54 extern int msgdone_cnt;
  55 extern int ignore_errors;
  56 extern int remove_source_files;
  57 extern int delay_updates;
  58 extern int update_only;
  59 extern int ignore_existing;
  60 extern int ignore_non_existing;
  61 extern int inplace;
  62 extern int append_mode;
  63 extern int make_backups;
  64 extern int csum_length;
  65 extern int ignore_times;
  66 extern int size_only;
  67 extern OFF_T max_size;
  68 extern OFF_T min_size;
  69 extern int io_error;
  70 extern int flist_eof;
  71 extern int allowed_lull;
  72 extern int sock_f_out;
  73 extern int ignore_timeout;
  74 extern int protocol_version;
  75 extern int file_total;
  76 extern int fuzzy_basis;
  77 extern int always_checksum;
  78 extern int checksum_len;
  79 extern char *partial_dir;
  80 extern char *basis_dir[];
  81 extern int compare_dest;
  82 extern int copy_dest;
  83 extern int link_dest;
  84 extern int whole_file;
  85 extern int list_only;
  86 extern int read_batch;
  87 extern int safe_symlinks;
  88 extern long block_size; /* "long" because popt can't set an int32. */
  89 extern int unsort_ndx;
  90 extern int max_delete;
  91 extern int force_delete;
  92 extern int one_file_system;
  93 extern struct stats stats;
  94 extern dev_t filesystem_dev;
  95 extern mode_t orig_umask;
  96 extern uid_t our_uid;
  97 extern char *backup_dir;
  98 extern char *backup_suffix;
  99 extern int backup_suffix_len;
 100 extern struct file_list *cur_flist, *first_flist, *dir_flist;
 101 extern struct filter_list_struct server_filter_list;
 102
 103 int ignore_perishable = 0;
 104 int non_perishable_cnt = 0;
 105 int maybe_ATTRS_REPORT = 0;
 106
 107 static dev_t dev_zero;
 108 static int deletion_count = 0; /* used to implement --max-delete */
 109 static int deldelay_size = 0, deldelay_cnt = 0;
 110 static char *deldelay_buf = NULL;
 111 static int deldelay_fd = -1;
 112 static int lull_mod;
 113 static int dir_tweaking;
 114 static int need_retouch_dir_times;
 115 static int need_retouch_dir_perms;
 116 static const char *solo_file = NULL;
 117
 118 /* For calling delete_item() and delete_dir_contents(). */
 119 #define DEL_OWNED_BY_US         (1<<0) /* file/dir has our uid */
 120 #define DEL_RECURSE             (1<<1) /* if dir, delete all contents */
 121 #define DEL_DIR_IS_EMPTY        (1<<2) /* internal delete_FUNCTIONS use only */
 122 #define DEL_FOR_FILE            (1<<3) /* making room for a replacement file */
 123 #define DEL_FOR_DIR             (1<<4) /* making room for a replacement dir */
 124 #define DEL_FOR_SYMLINK         (1<<5) /* making room for a replacement symlink */
 125 #define DEL_FOR_DEVICE          (1<<6) /* making room for a replacement device */
 126 #define DEL_FOR_SPECIAL         (1<<7) /* making room for a replacement special */
 127
 128 #define DEL_MAKE_ROOM (DEL_FOR_FILE|DEL_FOR_DIR|DEL_FOR_SYMLINK|DEL_FOR_DEVICE|DEL_FOR_SPECIAL)
 129
 130 enum nonregtype {
 131     TYPE_DIR, TYPE_SPECIAL, TYPE_DEVICE, TYPE_SYMLINK
 132 };
 133
 134 enum delret {
 135     DR_SUCCESS = 0, DR_FAILURE, DR_AT_LIMIT, DR_NOT_EMPTY
 136 };
 137
 138 /* Forward declaration for delete_item(). */
 139 static enum delret delete_dir_contents(char *fname, int flags);
 140
 141 static int is_backup_file(char *fn)
 142 {
 143         int k = strlen(fn) - backup_suffix_len;
 144         return k > 0 && strcmp(fn+k, backup_suffix) == 0;
 145 }
 146
 147 /* Delete a file or directory.  If DEL_RECURSE is set in the flags, this will
 148  * delete recursively.
 149  *
 150  * Note that fbuf must point to a MAXPATHLEN buffer if the mode indicates it's
 151  * a directory! (The buffer is used for recursion, but returned unchanged.)
 152  */
 153 static enum delret delete_item(char *fbuf, int mode, int flags)
 154 {
 155         enum delret ret;
 156         char *what;
 157         int ok;
 158
 159         if (verbose > 2) {
 160                 rprintf(FINFO, "delete_item(%s) mode=%o flags=%d\n",
 161                         fbuf, mode, flags);
 162         }
 163
 164         if (!am_root && !(mode & S_IWUSR) && flags & DEL_OWNED_BY_US)
 165                 do_chmod(fbuf, mode |= S_IWUSR);
 166
 167         if (S_ISDIR(mode) && !(flags & DEL_DIR_IS_EMPTY)) {
 168                 ignore_perishable = 1;
 169                 /* If DEL_RECURSE is not set, this just reports emptiness. */
 170                 ret = delete_dir_contents(fbuf, flags);
 171                 ignore_perishable = 0;
 172                 if (ret == DR_NOT_EMPTY || ret == DR_AT_LIMIT)
 173                         goto check_ret;
 174                 /* OK: try to delete the directory. */
 175         }
 176
 177         if (!(flags & DEL_MAKE_ROOM) && max_delete >= 0 && ++deletion_count > max_delete)
 178                 return DR_AT_LIMIT;
 179
 180         if (S_ISDIR(mode)) {
 181                 what = "rmdir";
 182                 ok = do_rmdir(fbuf) == 0;
 183         } else if (make_backups > 0 && (backup_dir || !is_backup_file(fbuf))) {
 184                 what = "make_backup";
 185                 ok = make_backup(fbuf);
 186         } else {
 187                 what = "unlink";
 188                 ok = robust_unlink(fbuf) == 0;
 189         }
 190
 191         if (ok) {
 192                 if (!(flags & DEL_MAKE_ROOM))
 193                         log_delete(fbuf, mode);
 194                 ret = DR_SUCCESS;
 195         } else {
 196                 if (S_ISDIR(mode) && errno == ENOTEMPTY) {
 197                         rprintf(FINFO, "cannot delete non-empty directory: %s\n",
 198                                 fbuf);
 199                         ret = DR_NOT_EMPTY;
 200                 } else if (errno != ENOENT) {
 201                         rsyserr(FERROR, errno, "delete_file: %s(%s) failed",
 202                                 what, fbuf);
 203                         ret = DR_FAILURE;
 204                 } else {
 205                         deletion_count--;
 206                         ret = DR_SUCCESS;
 207                 }
 208         }
 209
 210   check_ret:
 211         if (ret != DR_SUCCESS && flags & DEL_MAKE_ROOM) {
 212                 const char *desc;
 213                 switch (flags & DEL_MAKE_ROOM) {
 214                 case DEL_FOR_FILE: desc = "regular file"; break;
 215                 case DEL_FOR_DIR: desc = "directory"; break;
 216                 case DEL_FOR_SYMLINK: desc = "symlink"; break;
 217                 case DEL_FOR_DEVICE: desc = "device file"; break;
 218                 case DEL_FOR_SPECIAL: desc = "special file"; break;
 219                 default: exit_cleanup(RERR_UNSUPPORTED); /* IMPOSSIBLE */
 220                 }
 221                 rprintf(FERROR_XFER, "could not make way for new %s: %s\n",
 222                         desc, fbuf);
 223         }
 224         return ret;
 225 }
 226
 227 /* The directory is about to be deleted: if DEL_RECURSE is given, delete all
 228  * its contents, otherwise just checks for content.  Returns DR_SUCCESS or
 229  * DR_NOT_EMPTY.  Note that fname must point to a MAXPATHLEN buffer!  (The
 230  * buffer is used for recursion, but returned unchanged.)
 231  */
 232 static enum delret delete_dir_contents(char *fname, int flags)
 233 {
 234         struct file_list *dirlist;
 235         enum delret ret;
 236         unsigned remainder;
 237         void *save_filters;
 238         int j, dlen;
 239         char *p;
 240
 241         if (verbose > 3) {
 242                 rprintf(FINFO, "delete_dir_contents(%s) flags=%d\n",
 243                         fname, flags);
 244         }
 245
 246         dlen = strlen(fname);
 247         save_filters = push_local_filters(fname, dlen);
 248
 249         non_perishable_cnt = 0;
 250         dirlist = get_dirlist(fname, dlen, 0);
 251         ret = non_perishable_cnt ? DR_NOT_EMPTY : DR_SUCCESS;
 252
 253         if (!dirlist->used)
 254                 goto done;
 255
 256         if (!(flags & DEL_RECURSE)) {
 257                 ret = DR_NOT_EMPTY;
 258                 goto done;
 259         }
 260
 261         p = fname + dlen;
 262         if (dlen != 1 || *fname != '/')
 263                 *p++ = '/';
 264         remainder = MAXPATHLEN - (p - fname);
 265
 266         /* We do our own recursion, so make delete_item() non-recursive. */
 267         flags = (flags & ~(DEL_RECURSE|DEL_MAKE_ROOM)) | DEL_DIR_IS_EMPTY;
 268
 269         for (j = dirlist->used; j--; ) {
 270                 struct file_struct *fp = dirlist->files[j];
 271
 272                 if (fp->flags & FLAG_MOUNT_DIR) {
 273                         if (verbose > 1) {
 274                                 rprintf(FINFO,
 275                                     "mount point, %s, pins parent directory\n",
 276                                     f_name(fp, NULL));
 277                         }
 278                         ret = DR_NOT_EMPTY;
 279                         continue;
 280                 }
 281
 282                 strlcpy(p, fp->basename, remainder);
 283                 if (!uid_ndx || (uid_t)F_OWNER(fp) == our_uid)
 284                         flags |= DEL_OWNED_BY_US;
 285                 else
 286                         flags &= ~DEL_OWNED_BY_US;
 287                 /* Save stack by recursing to ourself directly. */
 288                 if (S_ISDIR(fp->mode)) {
 289                         if (!am_root && !(fp->mode & S_IWUSR) && flags & DEL_OWNED_BY_US)
 290                                 do_chmod(fname, fp->mode |= S_IWUSR);
 291                         if (delete_dir_contents(fname, flags | DEL_RECURSE) != DR_SUCCESS)
 292                                 ret = DR_NOT_EMPTY;
 293                 }
 294                 if (delete_item(fname, fp->mode, flags) != DR_SUCCESS)
 295                         ret = DR_NOT_EMPTY;
 296         }
 297
 298         fname[dlen] = '\0';
 299
 300   done:
 301         flist_free(dirlist);
 302         pop_local_filters(save_filters);
 303
 304         if (ret == DR_NOT_EMPTY) {
 305                 rprintf(FINFO, "cannot delete non-empty directory: %s\n",
 306                         fname);
 307         }
 308         return ret;
 309 }
 310
 311 static int start_delete_delay_temp(void)
 312 {
 313         char fnametmp[MAXPATHLEN];
 314         int save_dry_run = dry_run;
 315
 316         dry_run = 0;
 317         if (!get_tmpname(fnametmp, "deldelay")
 318          || (deldelay_fd = do_mkstemp(fnametmp, 0600)) < 0) {
 319                 rprintf(FINFO, "NOTE: Unable to create delete-delay temp file%s.\n",
 320                         inc_recurse ? "" : " -- switching to --delete-after");
 321                 delete_during = 0;
 322                 delete_after = !inc_recurse;
 323                 dry_run = save_dry_run;
 324                 return 0;
 325         }
 326         unlink(fnametmp);
 327         dry_run = save_dry_run;
 328         return 1;
 329 }
 330
 331 static int flush_delete_delay(void)
 332 {
 333         if (write(deldelay_fd, deldelay_buf, deldelay_cnt) != deldelay_cnt) {
 334                 rsyserr(FERROR, errno, "flush of delete-delay buffer");
 335                 delete_during = 0;
 336                 delete_after = 1;
 337                 close(deldelay_fd);
 338                 return 0;
 339         }
 340         deldelay_cnt = 0;
 341         return 1;
 342 }
 343
 344 static int remember_delete(struct file_struct *file, const char *fname, int flags)
 345 {
 346         const char *plus = (!am_root && !(file->mode & S_IWUSR) && flags & DEL_OWNED_BY_US)
 347                          ? "+" : "";
 348         int len;
 349
 350         while (1) {
 351                 len = snprintf(deldelay_buf + deldelay_cnt,
 352                                deldelay_size - deldelay_cnt,
 353                                "%s%x %s%c",
 354                                plus, (int)file->mode, fname, '\0');
 355                 if ((deldelay_cnt += len) <= deldelay_size)
 356                         break;
 357                 if (deldelay_fd < 0 && !start_delete_delay_temp())
 358                         return 0;
 359                 deldelay_cnt -= len;
 360                 if (!flush_delete_delay())
 361                         return 0;
 362         }
 363
 364         return 1;
 365 }
 366
 367 static int read_delay_line(char *buf, int *own_flag_p)
 368 {
 369         static int read_pos = 0;
 370         int j, len, mode;
 371         char *bp, *past_space;
 372
 373         while (1) {
 374                 for (j = read_pos; j < deldelay_cnt && deldelay_buf[j]; j++) {}
 375                 if (j < deldelay_cnt)
 376                         break;
 377                 if (deldelay_fd < 0) {
 378                         if (j > read_pos)
 379                                 goto invalid_data;
 380                         return -1;
 381                 }
 382                 deldelay_cnt -= read_pos;
 383                 if (deldelay_cnt == deldelay_size)
 384                         goto invalid_data;
 385                 if (deldelay_cnt && read_pos) {
 386                         memmove(deldelay_buf, deldelay_buf + read_pos,
 387                                 deldelay_cnt);
 388                 }
 389                 len = read(deldelay_fd, deldelay_buf + deldelay_cnt,
 390                            deldelay_size - deldelay_cnt);
 391                 if (len == 0) {
 392                         if (deldelay_cnt) {
 393                                 rprintf(FERROR,
 394                                     "ERROR: unexpected EOF in delete-delay file.\n");
 395                         }
 396                         return -1;
 397                 }
 398                 if (len < 0) {
 399                         rsyserr(FERROR, errno,
 400                                 "reading delete-delay file");
 401                         return -1;
 402                 }
 403                 deldelay_cnt += len;
 404                 read_pos = 0;
 405         }
 406
 407         bp = deldelay_buf + read_pos;
 408         if (*bp == '+') {
 409                 bp++;
 410                 *own_flag_p = DEL_OWNED_BY_US;
 411         } else
 412                 *own_flag_p = 0;
 413
 414         if (sscanf(bp, "%x ", &mode) != 1) {
 415           invalid_data:
 416                 rprintf(FERROR, "ERROR: invalid data in delete-delay file.\n");
 417                 return -1;
 418         }
 419         past_space = strchr(bp, ' ') + 1;
 420         len = j - read_pos - (past_space - bp) + 1; /* count the '\0' */
 421         read_pos = j + 1;
 422
 423         if (len > MAXPATHLEN) {
 424                 rprintf(FERROR, "ERROR: filename too long in delete-delay file.\n");
 425                 return -1;
 426         }
 427
 428         /* The caller needs the name in a MAXPATHLEN buffer, so we copy it
 429          * instead of returning a pointer to our buffer. */
 430         memcpy(buf, past_space, len);
 431
 432         return mode;
 433 }
 434
 435 static void do_delayed_deletions(char *delbuf)
 436 {
 437         int mode, own_flag;
 438
 439         if (deldelay_fd >= 0) {
 440                 if (deldelay_cnt && !flush_delete_delay())
 441                         return;
 442                 lseek(deldelay_fd, 0, 0);
 443         }
 444         while ((mode = read_delay_line(delbuf, &own_flag)) >= 0)
 445                 delete_item(delbuf, mode, own_flag | DEL_RECURSE);
 446         if (deldelay_fd >= 0)
 447                 close(deldelay_fd);
 448 }
 449
 450 /* This function is used to implement per-directory deletion, and is used by
 451  * all the --delete-WHEN options.  Note that the fbuf pointer must point to a
 452  * MAXPATHLEN buffer with the name of the directory in it (the functions we
 453  * call will append names onto the end, but the old dir value will be restored
 454  * on exit). */
 455 static void delete_in_dir(char *fbuf, struct file_struct *file, dev_t *fs_dev)
 456 {
 457         static int already_warned = 0;
 458         struct file_list *dirlist;
 459         char delbuf[MAXPATHLEN];
 460         int dlen, i;
 461
 462         if (!fbuf) {
 463                 change_local_filter_dir(NULL, 0, 0);
 464                 return;
 465         }
 466
 467         if (verbose > 2)
 468                 rprintf(FINFO, "delete_in_dir(%s)\n", fbuf);
 469
 470         if (allowed_lull)
 471                 maybe_send_keepalive();
 472
 473         if (io_error && !ignore_errors) {
 474                 if (already_warned)
 475                         return;
 476                 rprintf(FINFO,
 477                         "IO error encountered -- skipping file deletion\n");
 478                 already_warned = 1;
 479                 return;
 480         }
 481
 482         dlen = strlen(fbuf);
 483         change_local_filter_dir(fbuf, dlen, F_DEPTH(file));
 484
 485         if (one_file_system) {
 486                 if (file->flags & FLAG_TOP_DIR)
 487                         filesystem_dev = *fs_dev;
 488                 else if (filesystem_dev != *fs_dev)
 489                         return;
 490         }
 491
 492         dirlist = get_dirlist(fbuf, dlen, 0);
 493
 494         /* If an item in dirlist is not found in flist, delete it
 495          * from the filesystem. */
 496         for (i = dirlist->used; i--; ) {
 497                 struct file_struct *fp = dirlist->files[i];
 498                 if (!F_IS_ACTIVE(fp))
 499                         continue;
 500                 if (fp->flags & FLAG_MOUNT_DIR) {
 501                         if (verbose > 1)
 502                                 rprintf(FINFO, "cannot delete mount point: %s\n",
 503                                         f_name(fp, NULL));
 504                         continue;
 505                 }
 506                 if (flist_find(cur_flist, fp) < 0) {
 507                         int flags = DEL_RECURSE
 508                                   | (!uid_ndx || (uid_t)F_OWNER(fp) == our_uid ? DEL_OWNED_BY_US : 0);
 509                         f_name(fp, delbuf);
 510                         if (delete_during == 2) {
 511                                 if (!remember_delete(fp, delbuf, flags))
 512                                         break;
 513                         } else
 514                                 delete_item(delbuf, fp->mode, flags);
 515                 }
 516         }
 517
 518         flist_free(dirlist);
 519 }
 520
 521 /* This deletes any files on the receiving side that are not present on the
 522  * sending side.  This is used by --delete-before and --delete-after. */
 523 static void do_delete_pass(void)
 524 {
 525         char fbuf[MAXPATHLEN];
 526         STRUCT_STAT st;
 527         int j;
 528
 529         /* dry_run is incremented when the destination doesn't exist yet. */
 530         if (dry_run > 1 || list_only)
 531                 return;
 532
 533         for (j = 0; j < cur_flist->used; j++) {
 534                 struct file_struct *file = cur_flist->sorted[j];
 535
 536                 if (!(file->flags & FLAG_CONTENT_DIR))
 537                         continue;
 538
 539                 f_name(file, fbuf);
 540                 if (verbose > 1 && file->flags & FLAG_TOP_DIR)
 541                         rprintf(FINFO, "deleting in %s\n", fbuf);
 542
 543                 if (link_stat(fbuf, &st, keep_dirlinks) < 0
 544                  || !S_ISDIR(st.st_mode))
 545                         continue;
 546
 547                 delete_in_dir(fbuf, file, &st.st_dev);
 548         }
 549         delete_in_dir(NULL, NULL, &dev_zero);
 550
 551         if (do_progress && !am_server)
 552                 rprintf(FINFO, "                    \r");
 553 }
 554
 555 int unchanged_attrs(const char *fname, struct file_struct *file, stat_x *sxp)
 556 {
 557 #if !defined HAVE_LUTIMES || !defined HAVE_UTIMES
 558         if (S_ISLNK(file->mode)) {
 559                 ;
 560         } else
 561 #endif
 562         if (preserve_times && cmp_time(sxp->st.st_mtime, file->modtime) != 0)
 563                 return 0;
 564
 565         if (preserve_perms && !BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
 566                 return 0;
 567
 568         if (preserve_executability && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
 569                 return 0;
 570
 571         if (am_root && uid_ndx && sxp->st.st_uid != (uid_t)F_OWNER(file))
 572                 return 0;
 573
 574         if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP) && sxp->st.st_gid != (gid_t)F_GROUP(file))
 575                 return 0;
 576
 577 #ifdef SUPPORT_ACLS
 578         if (preserve_acls && !S_ISLNK(file->mode)) {
 579                 if (!ACL_READY(*sxp))
 580                         get_acl(fname, sxp);
 581                 if (set_acl(NULL, file, sxp) == 0)
 582                         return 0;
 583         }
 584 #endif
 585 #ifdef SUPPORT_XATTRS
 586         if (preserve_xattrs) {
 587                 if (!XATTR_READY(*sxp))
 588                         get_xattr(fname, sxp);
 589                 if (xattr_diff(file, sxp, 0))
 590                         return 0;
 591         }
 592 #endif
 593
 594         return 1;
 595 }
 596
 597 void itemize(const char *fnamecmp, struct file_struct *file, int ndx, int statret,
 598              stat_x *sxp, int32 iflags, uchar fnamecmp_type,
 599              const char *xname)
 600 {
 601         if (statret >= 0) { /* A from-dest-dir statret can == 1! */
 602                 int keep_time = !preserve_times ? 0
 603                     : S_ISDIR(file->mode) ? preserve_times > 1 :
 604 #if defined HAVE_LUTIMES && defined HAVE_UTIMES
 605                     (receiver_symlink_times && !(file->flags & FLAG_TIME_FAILED)) ||
 606 #endif
 607                     !S_ISLNK(file->mode);
 608
 609                 if (S_ISREG(file->mode) && F_LENGTH(file) != sxp->st.st_size)
 610                         iflags |= ITEM_REPORT_SIZE;
 611                 if ((iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !keep_time
 612                   && !(iflags & ITEM_MATCHED)
 613                   && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
 614                  || (keep_time && cmp_time(file->modtime, sxp->st.st_mtime) != 0))
 615                         iflags |= ITEM_REPORT_TIME;
 616 #if !defined HAVE_LCHMOD && !defined HAVE_SETATTRLIST
 617                 if (S_ISLNK(file->mode)) {
 618                         ;
 619                 } else
 620 #endif
 621                 if ((preserve_perms || preserve_executability)
 622                  && !BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
 623                         iflags |= ITEM_REPORT_PERMS;
 624                 if (uid_ndx && am_root && (uid_t)F_OWNER(file) != sxp->st.st_uid)
 625                         iflags |= ITEM_REPORT_OWNER;
 626                 if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP)
 627                     && sxp->st.st_gid != (gid_t)F_GROUP(file))
 628                         iflags |= ITEM_REPORT_GROUP;
 629 #ifdef SUPPORT_ACLS
 630                 if (preserve_acls && !S_ISLNK(file->mode)) {
 631                         if (!ACL_READY(*sxp))
 632                                 get_acl(fnamecmp, sxp);
 633                         if (set_acl(NULL, file, sxp) == 0)
 634                                 iflags |= ITEM_REPORT_ACL;
 635                 }
 636 #endif
 637 #ifdef SUPPORT_XATTRS
 638                 if (preserve_xattrs) {
 639                         if (!XATTR_READY(*sxp))
 640                                 get_xattr(fnamecmp, sxp);
 641                         if (xattr_diff(file, sxp, 1))
 642                                 iflags |= ITEM_REPORT_XATTR;
 643                 }
 644 #endif
 645         } else {
 646 #ifdef SUPPORT_XATTRS
 647                 if (preserve_xattrs && xattr_diff(file, NULL, 1))
 648                         iflags |= ITEM_REPORT_XATTR;
 649 #endif
 650                 iflags |= ITEM_IS_NEW;
 651         }
 652
 653         iflags &= 0xffff;
 654         if ((iflags & (SIGNIFICANT_ITEM_FLAGS|ITEM_REPORT_XATTR) || verbose > 1
 655           || stdout_format_has_i > 1 || (xname && *xname)) && !read_batch) {
 656                 if (protocol_version >= 29) {
 657                         if (ndx >= 0)
 658                                 write_ndx(sock_f_out, ndx);
 659                         write_shortint(sock_f_out, iflags);
 660                         if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
 661                                 write_byte(sock_f_out, fnamecmp_type);
 662                         if (iflags & ITEM_XNAME_FOLLOWS)
 663                                 write_vstring(sock_f_out, xname, strlen(xname));
 664 #ifdef SUPPORT_XATTRS
 665                         if (iflags & ITEM_REPORT_XATTR && !dry_run)
 666                                 send_xattr_request(NULL, file, sock_f_out);
 667 #endif
 668                 } else if (ndx >= 0) {
 669                         enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
 670                         log_item(code, file, &stats, iflags, xname);
 671                 }
 672         }
 673 }
 674
 675
 676 /* Perform our quick-check heuristic for determining if a file is unchanged. */
 677 int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
 678 {
 679         if (st->st_size != F_LENGTH(file))
 680                 return 0;
 681
 682         /* if always checksum is set then we use the checksum instead
 683            of the file time to determine whether to sync */
 684         if (always_checksum > 0 && S_ISREG(st->st_mode)) {
 685                 char sum[MAX_DIGEST_LEN];
 686                 file_checksum(fn, sum, st->st_size);
 687                 return memcmp(sum, F_SUM(file), checksum_len) == 0;
 688         }
 689
 690         if (size_only > 0)
 691                 return 1;
 692
 693         if (ignore_times)
 694                 return 0;
 695
 696         return cmp_time(st->st_mtime, file->modtime) == 0;
 697 }
 698
 699
 700 /*
 701  * set (initialize) the size entries in the per-file sum_struct
 702  * calculating dynamic block and checksum sizes.
 703  *
 704  * This is only called from generate_and_send_sums() but is a separate
 705  * function to encapsulate the logic.
 706  *
 707  * The block size is a rounded square root of file length.
 708  *
 709  * The checksum size is determined according to:
 710  *     blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
 711  * provided by Donovan Baarda which gives a probability of rsync
 712  * algorithm corrupting data and falling back using the whole md4
 713  * checksums.
 714  *
 715  * This might be made one of several selectable heuristics.
 716  */
 717 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
 718 {
 719         int32 blength;
 720         int s2length;
 721
 722         if (block_size)
 723                 blength = block_size;
 724         else if (len <= BLOCK_SIZE * BLOCK_SIZE)
 725                 blength = BLOCK_SIZE;
 726         else {
 727                 int32 c;
 728                 int64 l;
 729                 int cnt;
 730                 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
 731                 if (cnt >= 31 || c >= MAX_BLOCK_SIZE)
 732                         blength = MAX_BLOCK_SIZE;
 733                 else {
 734                     blength = 0;
 735                     do {
 736                             blength |= c;
 737                             if (len < (int64)blength * blength)
 738                                     blength &= ~c;
 739                             c >>= 1;
 740                     } while (c >= 8);   /* round to multiple of 8 */
 741                     blength = MAX(blength, BLOCK_SIZE);
 742                 }
 743         }
 744
 745         if (protocol_version < 27) {
 746                 s2length = csum_length;
 747         } else if (csum_length == SUM_LENGTH) {
 748                 s2length = SUM_LENGTH;
 749         } else {
 750                 int32 c;
 751                 int64 l;
 752                 int b = BLOCKSUM_BIAS;
 753                 for (l = len; l >>= 1; b += 2) {}
 754                 for (c = blength; (c >>= 1) && b; b--) {}
 755                 /* add a bit, subtract rollsum, round up. */
 756                 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
 757                 s2length = MAX(s2length, csum_length);
 758                 s2length = MIN(s2length, SUM_LENGTH);
 759         }
 760
 761         sum->flength    = len;
 762         sum->blength    = blength;
 763         sum->s2length   = s2length;
 764         sum->remainder  = (int32)(len % blength);
 765         sum->count      = (int32)(len / blength) + (sum->remainder != 0);
 766
 767         if (sum->count && verbose > 2) {
 768                 rprintf(FINFO,
 769                         "count=%.0f rem=%ld blength=%ld s2length=%d flength=%.0f\n",
 770                         (double)sum->count, (long)sum->remainder, (long)sum->blength,
 771                         sum->s2length, (double)sum->flength);
 772         }
 773 }
 774
 775
 776 /*
 777  * Generate and send a stream of signatures/checksums that describe a buffer
 778  *
 779  * Generate approximately one checksum every block_len bytes.
 780  */
 781 static void generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
 782 {
 783         int32 i;
 784         struct map_struct *mapbuf;
 785         struct sum_struct sum;
 786         OFF_T offset = 0;
 787
 788         sum_sizes_sqroot(&sum, len);
 789         write_sum_head(f_out, &sum);
 790
 791         if (append_mode > 0 && f_copy < 0)
 792                 return;
 793
 794         if (len > 0)
 795                 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
 796         else
 797                 mapbuf = NULL;
 798
 799         for (i = 0; i < sum.count; i++) {
 800                 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
 801                 char *map = map_ptr(mapbuf, offset, n1);
 802                 char sum2[SUM_LENGTH];
 803                 uint32 sum1;
 804
 805                 len -= n1;
 806                 offset += n1;
 807
 808                 if (f_copy >= 0) {
 809                         full_write(f_copy, map, n1);
 810                         if (append_mode > 0)
 811                                 continue;
 812                 }
 813
 814                 sum1 = get_checksum1(map, n1);
 815                 get_checksum2(map, n1, sum2);
 816
 817                 if (verbose > 3) {
 818                         rprintf(FINFO,
 819                                 "chunk[%.0f] offset=%.0f len=%ld sum1=%08lx\n",
 820                                 (double)i, (double)offset - n1, (long)n1,
 821                                 (unsigned long)sum1);
 822                 }
 823                 write_int(f_out, sum1);
 824                 write_buf(f_out, sum2, sum.s2length);
 825         }
 826
 827         if (mapbuf)
 828                 unmap_file(mapbuf);
 829 }
 830
 831
 832 /* Try to find a filename in the same dir as "fname" with a similar name. */
 833 static int find_fuzzy(struct file_struct *file, struct file_list *dirlist)
 834 {
 835         int fname_len, fname_suf_len;
 836         const char *fname_suf, *fname = file->basename;
 837         uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
 838         int j, lowest_j = -1;
 839
 840         fname_len = strlen(fname);
 841         fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
 842
 843         for (j = 0; j < dirlist->used; j++) {
 844                 struct file_struct *fp = dirlist->files[j];
 845                 const char *suf, *name;
 846                 int len, suf_len;
 847                 uint32 dist;
 848
 849                 if (!S_ISREG(fp->mode) || !F_LENGTH(fp)
 850                  || fp->flags & FLAG_FILE_SENT)
 851                         continue;
 852
 853                 name = fp->basename;
 854
 855                 if (F_LENGTH(fp) == F_LENGTH(file)
 856                     && cmp_time(fp->modtime, file->modtime) == 0) {
 857                         if (verbose > 4) {
 858                                 rprintf(FINFO,
 859                                         "fuzzy size/modtime match for %s\n",
 860                                         name);
 861                         }
 862                         return j;
 863                 }
 864
 865                 len = strlen(name);
 866                 suf = find_filename_suffix(name, len, &suf_len);
 867
 868                 dist = fuzzy_distance(name, len, fname, fname_len);
 869                 /* Add some extra weight to how well the suffixes match. */
 870                 dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len)
 871                       * 10;
 872                 if (verbose > 4) {
 873                         rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
 874                                 name, (int)(dist>>16), (int)(dist&0xFFFF));
 875                 }
 876                 if (dist <= lowest_dist) {
 877                         lowest_dist = dist;
 878                         lowest_j = j;
 879                 }
 880         }
 881
 882         return lowest_j;
 883 }
 884
 885 /* Copy a file found in our --copy-dest handling. */
 886 static int copy_altdest_file(const char *src, const char *dest, struct file_struct *file)
 887 {
 888         char buf[MAXPATHLEN];
 889         const char *copy_to, *partialptr;
 890         int ok, fd_w;
 891
 892         if (inplace) {
 893                 /* Let copy_file open the destination in place. */
 894                 fd_w = -1;
 895                 copy_to = dest;
 896         } else {
 897                 fd_w = open_tmpfile(buf, dest, file);
 898                 if (fd_w < 0)
 899                         return -1;
 900                 copy_to = buf;
 901         }
 902         cleanup_set(copy_to, NULL, NULL, -1, -1);
 903         if (copy_file(src, copy_to, fd_w, file->mode, 0) < 0) {
 904                 if (verbose) {
 905                         rsyserr(FINFO, errno, "copy_file %s => %s",
 906                                 full_fname(src), copy_to);
 907                 }
 908                 /* Try to clean up. */
 909                 unlink(copy_to);
 910                 cleanup_disable();
 911                 return -1;
 912         }
 913         partialptr = partial_dir ? partial_dir_fname(dest) : NULL;
 914         ok = finish_transfer(dest, copy_to, src, partialptr, file, 1, 0);
 915         cleanup_disable();
 916         return ok ? 0 : -1;
 917 }
 918
 919 /* This is only called for regular files.  We return -2 if we've finished
 920  * handling the file, -1 if no dest-linking occurred, or a non-negative
 921  * value if we found an alternate basis file. */
 922 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
 923                          char *cmpbuf, stat_x *sxp, int itemizing,
 924                          enum logcode code)
 925 {
 926         int best_match = -1;
 927         int match_level = 0;
 928         int j = 0;
 929
 930         do {
 931                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 932                 if (link_stat(cmpbuf, &sxp->st, 0) < 0 || !S_ISREG(sxp->st.st_mode))
 933                         continue;
 934                 switch (match_level) {
 935                 case 0:
 936                         best_match = j;
 937                         match_level = 1;
 938                         /* FALL THROUGH */
 939                 case 1:
 940                         if (!unchanged_file(cmpbuf, file, &sxp->st))
 941                                 continue;
 942                         best_match = j;
 943                         match_level = 2;
 944                         /* FALL THROUGH */
 945                 case 2:
 946                         if (!unchanged_attrs(cmpbuf, file, sxp))
 947                                 continue;
 948                         best_match = j;
 949                         match_level = 3;
 950                         break;
 951                 }
 952                 break;
 953         } while (basis_dir[++j] != NULL);
 954
 955         if (!match_level)
 956                 return -1;
 957
 958         if (j != best_match) {
 959                 j = best_match;
 960                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 961                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
 962                         return -1;
 963         }
 964
 965         if (match_level == 3 && !copy_dest) {
 966 #ifdef SUPPORT_HARD_LINKS
 967                 if (link_dest) {
 968                         if (!hard_link_one(file, fname, cmpbuf, 1))
 969                                 goto try_a_copy;
 970                         if (preserve_hard_links && F_IS_HLINKED(file))
 971                                 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, j);
 972                         if (!maybe_ATTRS_REPORT && (verbose > 1 || stdout_format_has_i > 1)) {
 973                                 itemize(cmpbuf, file, ndx, 1, sxp,
 974                                         ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS,
 975                                         0, "");
 976                         }
 977                 } else
 978 #endif
 979                 if (itemizing)
 980                         itemize(cmpbuf, file, ndx, 0, sxp, 0, 0, NULL);
 981                 if (verbose > 1 && maybe_ATTRS_REPORT)
 982                         rprintf(FCLIENT, "%s is uptodate\n", fname);
 983                 return -2;
 984         }
 985
 986         if (match_level >= 2) {
 987 #ifdef SUPPORT_HARD_LINKS
 988           try_a_copy: /* Copy the file locally. */
 989 #endif
 990                 if (!dry_run && copy_altdest_file(cmpbuf, fname, file) < 0)
 991                         return -1;
 992                 if (itemizing)
 993                         itemize(cmpbuf, file, ndx, 0, sxp, ITEM_LOCAL_CHANGE, 0, NULL);
 994                 if (maybe_ATTRS_REPORT
 995                  && ((!itemizing && verbose && match_level == 2)
 996                   || (verbose > 1 && match_level == 3))) {
 997                         code = match_level == 3 ? FCLIENT : FINFO;
 998                         rprintf(code, "%s%s\n", fname,
 999                                 match_level == 3 ? " is uptodate" : "");
1000                 }
1001 #ifdef SUPPORT_HARD_LINKS
1002                 if (preserve_hard_links && F_IS_HLINKED(file))
1003                         finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, -1);
1004 #endif
1005                 return -2;
1006         }
1007
1008         return FNAMECMP_BASIS_DIR_LOW + j;
1009 }
1010
1011 /* This is only called for non-regular files.  We return -2 if we've finished
1012  * handling the file, or -1 if no dest-linking occurred, or a non-negative
1013  * value if we found an alternate basis file. */
1014 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
1015                          char *cmpbuf, stat_x *sxp, int itemizing,
1016                          enum logcode code)
1017 {
1018         char lnk[MAXPATHLEN];
1019         int best_match = -1;
1020         int match_level = 0;
1021         enum nonregtype type;
1022         uint32 *devp;
1023         int len, j = 0;
1024
1025 #ifndef SUPPORT_LINKS
1026         if (S_ISLNK(file->mode))
1027                 return -1;
1028 #endif
1029         if (S_ISDIR(file->mode)) {
1030                 type = TYPE_DIR;
1031         } else if (IS_SPECIAL(file->mode))
1032                 type = TYPE_SPECIAL;
1033         else if (IS_DEVICE(file->mode))
1034                 type = TYPE_DEVICE;
1035 #ifdef SUPPORT_LINKS
1036         else if (S_ISLNK(file->mode))
1037                 type = TYPE_SYMLINK;
1038 #endif
1039         else {
1040                 rprintf(FERROR,
1041                         "internal: try_dests_non() called with invalid mode (%o)\n",
1042                         (int)file->mode);
1043                 exit_cleanup(RERR_UNSUPPORTED);
1044         }
1045
1046         do {
1047                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1048                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1049                         continue;
1050                 switch (type) {
1051                 case TYPE_DIR:
1052                         if (!S_ISDIR(sxp->st.st_mode))
1053                                 continue;
1054                         break;
1055                 case TYPE_SPECIAL:
1056                         if (!IS_SPECIAL(sxp->st.st_mode))
1057                                 continue;
1058                         break;
1059                 case TYPE_DEVICE:
1060                         if (!IS_DEVICE(sxp->st.st_mode))
1061                                 continue;
1062                         break;
1063 #ifdef SUPPORT_LINKS
1064                 case TYPE_SYMLINK:
1065                         if (!S_ISLNK(sxp->st.st_mode))
1066                                 continue;
1067                         break;
1068 #endif
1069                 }
1070                 if (match_level < 1) {
1071                         match_level = 1;
1072                         best_match = j;
1073                 }
1074                 switch (type) {
1075                 case TYPE_DIR:
1076                         break;
1077                 case TYPE_SPECIAL:
1078                 case TYPE_DEVICE:
1079                         devp = F_RDEV_P(file);
1080                         if (sxp->st.st_rdev != MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)))
1081                                 continue;
1082                         break;
1083 #ifdef SUPPORT_LINKS
1084                 case TYPE_SYMLINK:
1085                         if ((len = readlink(cmpbuf, lnk, MAXPATHLEN-1)) <= 0)
1086                                 continue;
1087                         lnk[len] = '\0';
1088                         if (strcmp(lnk, F_SYMLINK(file)) != 0)
1089                                 continue;
1090                         break;
1091 #endif
1092                 }
1093                 if (match_level < 2) {
1094                         match_level = 2;
1095                         best_match = j;
1096                 }
1097                 if (unchanged_attrs(cmpbuf, file, sxp)) {
1098                         match_level = 3;
1099                         best_match = j;
1100                         break;
1101                 }
1102         } while (basis_dir[++j] != NULL);
1103
1104         if (!match_level)
1105                 return -1;
1106
1107         if (j != best_match) {
1108                 j = best_match;
1109                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1110                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1111                         return -1;
1112         }
1113
1114         if (match_level == 3) {
1115 #ifdef SUPPORT_HARD_LINKS
1116                 if (link_dest
1117 #ifndef CAN_HARDLINK_SYMLINK
1118                  && !S_ISLNK(file->mode)
1119 #endif
1120 #ifndef CAN_HARDLINK_SPECIAL
1121                  && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
1122 #endif
1123                  && !S_ISDIR(file->mode)) {
1124                         if (do_link(cmpbuf, fname) < 0) {
1125                                 rsyserr(FERROR_XFER, errno,
1126                                         "failed to hard-link %s with %s",
1127                                         cmpbuf, fname);
1128                                 return j;
1129                         }
1130                         if (preserve_hard_links && F_IS_HLINKED(file))
1131                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1132                 } else
1133 #endif
1134                         match_level = 2;
1135                 if (itemizing && stdout_format_has_i
1136                  && (verbose > 1 || stdout_format_has_i > 1)) {
1137                         int chg = compare_dest && type != TYPE_DIR ? 0
1138                             : ITEM_LOCAL_CHANGE
1139                              + (match_level == 3 ? ITEM_XNAME_FOLLOWS : 0);
1140                         char *lp = match_level == 3 ? "" : NULL;
1141                         itemize(cmpbuf, file, ndx, 0, sxp, chg + ITEM_MATCHED, 0, lp);
1142                 }
1143                 if (verbose > 1 && maybe_ATTRS_REPORT) {
1144                         rprintf(FCLIENT, "%s%s is uptodate\n",
1145                                 fname, type == TYPE_DIR ? "/" : "");
1146                 }
1147                 return -2;
1148         }
1149
1150         return j;
1151 }
1152
1153 static void list_file_entry(struct file_struct *f)
1154 {
1155         char permbuf[PERMSTRING_SIZE];
1156         double len;
1157
1158         if (!F_IS_ACTIVE(f)) {
1159                 /* this can happen if duplicate names were removed */
1160                 return;
1161         }
1162
1163         permstring(permbuf, f->mode);
1164         len = F_LENGTH(f);
1165
1166         /* TODO: indicate '+' if the entry has an ACL. */
1167
1168 #ifdef SUPPORT_LINKS
1169         if (preserve_links && S_ISLNK(f->mode)) {
1170                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
1171                         permbuf, len, timestring(f->modtime),
1172                         f_name(f, NULL), F_SYMLINK(f));
1173         } else
1174 #endif
1175         {
1176                 rprintf(FINFO, "%s %11.0f %s %s\n",
1177                         permbuf, len, timestring(f->modtime),
1178                         f_name(f, NULL));
1179         }
1180 }
1181
1182 static int phase = 0;
1183 static int dflt_perms;
1184
1185 /* Acts on the indicated item in cur_flist whose name is fname.  If a dir,
1186  * make sure it exists, and has the right permissions/timestamp info.  For
1187  * all other non-regular files (symlinks, etc.) we create them here.  For
1188  * regular files that have changed, we try to find a basis file and then
1189  * start sending checksums.  The ndx is the file's unique index value.
1190  *
1191  * When fname is non-null, it must point to a MAXPATHLEN buffer!
1192  *
1193  * Note that f_out is set to -1 when doing final directory-permission and
1194  * modification-time repair. */
1195 static void recv_generator(char *fname, struct file_struct *file, int ndx,
1196                            int itemizing, enum logcode code, int f_out)
1197 {
1198         static int missing_below = -1, excluded_below = -1;
1199         static const char *parent_dirname = "";
1200         static struct file_struct *missing_dir = NULL, *excluded_dir = NULL;
1201         static struct file_list *fuzzy_dirlist = NULL;
1202         static int need_fuzzy_dirlist = 0;
1203         struct file_struct *fuzzy_file = NULL;
1204         int fd = -1, f_copy = -1;
1205         stat_x sx, real_sx;
1206         STRUCT_STAT partial_st;
1207         struct file_struct *back_file = NULL;
1208         int statret, real_ret, stat_errno;
1209         char *fnamecmp, *partialptr, *backupptr = NULL;
1210         char fnamecmpbuf[MAXPATHLEN];
1211         uchar fnamecmp_type;
1212         int implied_dirs_are_missing = relative_paths && !implied_dirs && protocol_version < 30;
1213         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1214         int is_dir = !S_ISDIR(file->mode) ? 0
1215                    : inc_recurse && ndx != cur_flist->ndx_start - 1 ? -1
1216                    : 1;
1217
1218         if (verbose > 2)
1219                 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
1220
1221         if (list_only) {
1222                 if (is_dir < 0
1223                  || (is_dir && !implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1224                         return;
1225                 list_file_entry(file);
1226                 return;
1227         }
1228
1229         if (server_filter_list.head) {
1230                 int filtered = check_filter(&server_filter_list, fname, is_dir) < 0;
1231                 if (is_dir < 0 && filtered)
1232                         return;
1233                 if (excluded_below >= 0) {
1234                         if (F_DEPTH(file) > excluded_below
1235                          && (!implied_dirs_are_missing || f_name_has_prefix(file, excluded_dir)))
1236                                 goto skipping;
1237                         excluded_below = -1;
1238                 }
1239                 if (filtered) {
1240                         if (is_dir) {
1241                                 excluded_below = F_DEPTH(file);
1242                                 excluded_dir = file;
1243                         }
1244                   skipping:
1245                         rprintf(FERROR_XFER,
1246                                 "skipping daemon-excluded file \"%s\"\n",
1247                                 fname);
1248                         return;
1249                 }
1250         }
1251
1252         if (missing_below >= 0) {
1253                 if (F_DEPTH(file) <= missing_below
1254                  || (implied_dirs_are_missing && !f_name_has_prefix(file, missing_dir))) {
1255                         if (dry_run)
1256                                 dry_run--;
1257                         missing_below = -1;
1258                 } else if (!dry_run) {
1259                         if (is_dir)
1260                                 file->flags |= FLAG_MISSING_DIR;
1261                         return;
1262                 }
1263         }
1264 #ifdef SUPPORT_ACLS
1265         sx.acc_acl = sx.def_acl = NULL;
1266 #endif
1267 #ifdef SUPPORT_XATTRS
1268         sx.xattr = NULL;
1269 #endif
1270         if (dry_run > 1) {
1271                 if (fuzzy_dirlist) {
1272                         flist_free(fuzzy_dirlist);
1273                         fuzzy_dirlist = NULL;
1274                 }
1275                 parent_dirname = "";
1276                 statret = -1;
1277                 stat_errno = ENOENT;
1278         } else {
1279                 const char *dn = file->dirname ? file->dirname : ".";
1280                 if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
1281                         if (relative_paths && !implied_dirs
1282                          && do_stat(dn, &sx.st) < 0
1283                          && create_directory_path(fname) < 0) {
1284                                 rsyserr(FERROR_XFER, errno,
1285                                         "recv_generator: mkdir %s failed",
1286                                         full_fname(dn));
1287                         }
1288                         if (fuzzy_dirlist) {
1289                                 flist_free(fuzzy_dirlist);
1290                                 fuzzy_dirlist = NULL;
1291                         }
1292                         if (fuzzy_basis)
1293                                 need_fuzzy_dirlist = 1;
1294 #ifdef SUPPORT_ACLS
1295                         if (!preserve_perms)
1296                                 dflt_perms = default_perms_for_dir(dn);
1297 #endif
1298                 }
1299                 parent_dirname = dn;
1300
1301                 if (need_fuzzy_dirlist && S_ISREG(file->mode)) {
1302                         strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf);
1303                         fuzzy_dirlist = get_dirlist(fnamecmpbuf, -1, 1);
1304                         need_fuzzy_dirlist = 0;
1305                 }
1306
1307                 statret = link_stat(fname, &sx.st, keep_dirlinks && is_dir);
1308                 stat_errno = errno;
1309         }
1310
1311         if (ignore_non_existing > 0 && statret == -1 && stat_errno == ENOENT) {
1312                 if (is_dir) {
1313                         if (is_dir < 0)
1314                                 return;
1315                         if (missing_below < 0) {
1316                                 if (dry_run)
1317                                         dry_run++;
1318                                 missing_below = F_DEPTH(file);
1319                                 missing_dir = file;
1320                         }
1321                         file->flags |= FLAG_MISSING_DIR;
1322                 }
1323                 if (verbose > 1) {
1324                         rprintf(FINFO, "not creating new %s \"%s\"\n",
1325                                 is_dir ? "directory" : "file", fname);
1326                 }
1327                 return;
1328         }
1329
1330         if (statret == 0 && sx.st.st_uid == our_uid)
1331                 del_opts |= DEL_OWNED_BY_US;
1332
1333         if (is_dir) {
1334                 if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
1335                         goto cleanup;
1336                 if (is_dir < 0) {
1337                         /* In inc_recurse mode we want to make sure any missing
1338                          * directories get created while we're still processing
1339                          * the parent dir (which allows us to touch the parent
1340                          * dir's mtime right away).  We will handle the dir in
1341                          * full later (right before we handle its contents). */
1342                         if (statret == 0
1343                          && (S_ISDIR(sx.st.st_mode)
1344                           || delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0))
1345                                 goto cleanup; /* Any errors get reported later. */
1346                         if (do_mkdir(fname, file->mode & 0700) == 0)
1347                                 file->flags |= FLAG_DIR_CREATED;
1348                         goto cleanup;
1349                 }
1350                 /* The file to be received is a directory, so we need
1351                  * to prepare appropriately.  If there is already a
1352                  * file of that name and it is *not* a directory, then
1353                  * we need to delete it.  If it doesn't exist, then
1354                  * (perhaps recursively) create it. */
1355                 if (statret == 0 && !S_ISDIR(sx.st.st_mode)) {
1356                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0)
1357                                 goto skipping_dir_contents;
1358                         statret = -1;
1359                 }
1360                 if (dry_run && statret != 0 && missing_below < 0) {
1361                         missing_below = F_DEPTH(file);
1362                         missing_dir = file;
1363                         dry_run++;
1364                 }
1365                 real_ret = statret;
1366                 real_sx = sx;
1367                 if (file->flags & FLAG_DIR_CREATED)
1368                         statret = -1;
1369                 if (!preserve_perms) { /* See comment in non-dir code below. */
1370                         file->mode = dest_mode(file->mode, sx.st.st_mode,
1371                                                dflt_perms, statret == 0);
1372                 }
1373                 if (statret != 0 && basis_dir[0] != NULL) {
1374                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1375                                               itemizing, code);
1376                         if (j == -2) {
1377                                 itemizing = 0;
1378                                 code = FNONE;
1379                         } else if (j >= 0)
1380                                 statret = 1;
1381                 }
1382                 if (itemizing && f_out != -1) {
1383                         itemize(fname, file, ndx, statret, &sx,
1384                                 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
1385                 }
1386                 if (real_ret != 0 && do_mkdir(fname,file->mode) < 0 && errno != EEXIST) {
1387                         if (!relative_paths || errno != ENOENT
1388                             || create_directory_path(fname) < 0
1389                             || (do_mkdir(fname, file->mode) < 0 && errno != EEXIST)) {
1390                                 rsyserr(FERROR_XFER, errno,
1391                                         "recv_generator: mkdir %s failed",
1392                                         full_fname(fname));
1393                           skipping_dir_contents:
1394                                 rprintf(FERROR,
1395                                     "*** Skipping any contents from this failed directory ***\n");
1396                                 missing_below = F_DEPTH(file);
1397                                 missing_dir = file;
1398                                 file->flags |= FLAG_MISSING_DIR;
1399                                 goto cleanup;
1400                         }
1401                 }
1402                 if (set_file_attrs(fname, file, real_ret ? NULL : &real_sx, NULL, 0)
1403                     && verbose && code != FNONE && f_out != -1)
1404                         rprintf(code, "%s/\n", fname);
1405
1406                 /* We need to ensure that the dirs in the transfer have writable
1407                  * permissions during the time we are putting files within them.
1408                  * This is then fixed after the transfer is done. */
1409 #ifdef HAVE_CHMOD
1410                 if (!am_root && !(file->mode & S_IWUSR) && dir_tweaking) {
1411                         mode_t mode = file->mode | S_IWUSR;
1412                         if (do_chmod(fname, mode) < 0) {
1413                                 rsyserr(FERROR_XFER, errno,
1414                                         "failed to modify permissions on %s",
1415                                         full_fname(fname));
1416                         }
1417                         need_retouch_dir_perms = 1;
1418                 }
1419 #endif
1420
1421                 if (real_ret != 0 && one_file_system)
1422                         real_sx.st.st_dev = filesystem_dev;
1423                 if (inc_recurse) {
1424                         if (one_file_system) {
1425                                 uint32 *devp = F_DIR_DEV_P(file);
1426                                 DEV_MAJOR(devp) = major(real_sx.st.st_dev);
1427                                 DEV_MINOR(devp) = minor(real_sx.st.st_dev);
1428                         }
1429                 }
1430                 else if (delete_during && f_out != -1 && !phase && dry_run < 2
1431                     && (file->flags & FLAG_CONTENT_DIR))
1432                         delete_in_dir(fname, file, &real_sx.st.st_dev);
1433                 goto cleanup;
1434         }
1435
1436         /* If we're not preserving permissions, change the file-list's
1437          * mode based on the local permissions and some heuristics. */
1438         if (!preserve_perms) {
1439                 int exists = statret == 0 && !S_ISDIR(sx.st.st_mode);
1440                 file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms,
1441                                        exists);
1442         }
1443
1444 #ifdef SUPPORT_HARD_LINKS
1445         if (preserve_hard_links && F_HLINK_NOT_FIRST(file)
1446          && hard_link_check(file, ndx, fname, statret, &sx, itemizing, code))
1447                 goto cleanup;
1448 #endif
1449
1450         if (preserve_links && S_ISLNK(file->mode)) {
1451 #ifdef SUPPORT_LINKS
1452                 const char *sl = F_SYMLINK(file);
1453                 if (safe_symlinks && unsafe_symlink(sl, fname)) {
1454                         if (verbose) {
1455                                 if (solo_file)
1456                                         fname = f_name(file, NULL);
1457                                 rprintf(FINFO,
1458                                         "ignoring unsafe symlink %s -> \"%s\"\n",
1459                                         full_fname(fname), sl);
1460                         }
1461                         return;
1462                 }
1463                 if (statret == 0) {
1464                         char lnk[MAXPATHLEN];
1465                         int len;
1466
1467                         if (!S_ISLNK(sx.st.st_mode))
1468                                 statret = -1;
1469                         else if ((len = readlink(fname, lnk, MAXPATHLEN-1)) > 0
1470                               && strncmp(lnk, sl, len) == 0 && sl[len] == '\0') {
1471                                 /* The link is pointing to the right place. */
1472                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1473                                 if (itemizing)
1474                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1475 #if defined SUPPORT_HARD_LINKS && defined CAN_HARDLINK_SYMLINK
1476                                 if (preserve_hard_links && F_IS_HLINKED(file))
1477                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1478 #endif
1479                                 if (remove_source_files == 1)
1480                                         goto return_with_success;
1481                                 goto cleanup;
1482                         }
1483                         /* Not the right symlink (or not a symlink), so
1484                          * delete it. */
1485                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_SYMLINK) != 0)
1486                                 goto cleanup;
1487                 } else if (basis_dir[0] != NULL) {
1488                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1489                                               itemizing, code);
1490                         if (j == -2) {
1491 #ifndef CAN_HARDLINK_SYMLINK
1492                                 if (link_dest) {
1493                                         /* Resort to --copy-dest behavior. */
1494                                 } else
1495 #endif
1496                                 if (!copy_dest)
1497                                         goto cleanup;
1498                                 itemizing = 0;
1499                                 code = FNONE;
1500                         } else if (j >= 0)
1501                                 statret = 1;
1502                 }
1503 #ifdef SUPPORT_HARD_LINKS
1504                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1505                         cur_flist->in_progress++;
1506                         goto cleanup;
1507                 }
1508 #endif
1509                 if (do_symlink(sl, fname) != 0) {
1510                         rsyserr(FERROR_XFER, errno, "symlink %s -> \"%s\" failed",
1511                                 full_fname(fname), sl);
1512                 } else {
1513                         set_file_attrs(fname, file, NULL, NULL, 0);
1514                         if (itemizing) {
1515                                 itemize(fname, file, ndx, statret, &sx,
1516                                         ITEM_LOCAL_CHANGE, 0, NULL);
1517                         }
1518                         if (code != FNONE && verbose)
1519                                 rprintf(code, "%s -> %s\n", fname, sl);
1520 #ifdef SUPPORT_HARD_LINKS
1521                         if (preserve_hard_links && F_IS_HLINKED(file))
1522                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1523 #endif
1524                         /* This does not check remove_source_files == 1
1525                          * because this is one of the items that the old
1526                          * --remove-sent-files option would remove. */
1527                         if (remove_source_files)
1528                                 goto return_with_success;
1529                 }
1530 #endif
1531                 goto cleanup;
1532         }
1533
1534         if ((am_root && preserve_devices && IS_DEVICE(file->mode))
1535          || (preserve_specials && IS_SPECIAL(file->mode))) {
1536                 uint32 *devp = F_RDEV_P(file);
1537                 dev_t rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
1538                 if (statret == 0) {
1539                         int del_for_flag;
1540                         if (IS_DEVICE(file->mode)) {
1541                                 if (!IS_DEVICE(sx.st.st_mode))
1542                                         statret = -1;
1543                                 del_for_flag = DEL_FOR_DEVICE;
1544                         } else {
1545                                 if (!IS_SPECIAL(sx.st.st_mode))
1546                                         statret = -1;
1547                                 del_for_flag = DEL_FOR_SPECIAL;
1548                         }
1549                         if (statret == 0
1550                          && BITS_EQUAL(sx.st.st_mode, file->mode, _S_IFMT)
1551                          && sx.st.st_rdev == rdev) {
1552                                 /* The device or special file is identical. */
1553                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1554                                 if (itemizing)
1555                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1556 #ifdef SUPPORT_HARD_LINKS
1557                                 if (preserve_hard_links && F_IS_HLINKED(file))
1558                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1559 #endif
1560                                 if (remove_source_files == 1)
1561                                         goto return_with_success;
1562                                 goto cleanup;
1563                         }
1564                         if (delete_item(fname, sx.st.st_mode, del_opts | del_for_flag) != 0)
1565                                 goto cleanup;
1566                 } else if (basis_dir[0] != NULL) {
1567                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1568                                               itemizing, code);
1569                         if (j == -2) {
1570 #ifndef CAN_HARDLINK_SPECIAL
1571                                 if (link_dest) {
1572                                         /* Resort to --copy-dest behavior. */
1573                                 } else
1574 #endif
1575                                 if (!copy_dest)
1576                                         goto cleanup;
1577                                 itemizing = 0;
1578                                 code = FNONE;
1579                         } else if (j >= 0)
1580                                 statret = 1;
1581                 }
1582 #ifdef SUPPORT_HARD_LINKS
1583                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1584                         cur_flist->in_progress++;
1585                         goto cleanup;
1586                 }
1587 #endif
1588                 if (verbose > 2) {
1589                         rprintf(FINFO, "mknod(%s, 0%o, [%ld,%ld])\n",
1590                                 fname, (int)file->mode,
1591                                 (long)major(rdev), (long)minor(rdev));
1592                 }
1593                 if (do_mknod(fname, file->mode, rdev) < 0) {
1594                         rsyserr(FERROR_XFER, errno, "mknod %s failed",
1595                                 full_fname(fname));
1596                 } else {
1597                         set_file_attrs(fname, file, NULL, NULL, 0);
1598                         if (itemizing) {
1599                                 itemize(fname, file, ndx, statret, &sx,
1600                                         ITEM_LOCAL_CHANGE, 0, NULL);
1601                         }
1602                         if (code != FNONE && verbose)
1603                                 rprintf(code, "%s\n", fname);
1604 #ifdef SUPPORT_HARD_LINKS
1605                         if (preserve_hard_links && F_IS_HLINKED(file))
1606                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1607 #endif
1608                         if (remove_source_files == 1)
1609                                 goto return_with_success;
1610                 }
1611                 goto cleanup;
1612         }
1613
1614         if (!S_ISREG(file->mode)) {
1615                 if (solo_file)
1616                         fname = f_name(file, NULL);
1617                 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1618                 goto cleanup;
1619         }
1620
1621         if (max_size > 0 && F_LENGTH(file) > max_size) {
1622                 if (verbose > 1) {
1623                         if (solo_file)
1624                                 fname = f_name(file, NULL);
1625                         rprintf(FINFO, "%s is over max-size\n", fname);
1626                 }
1627                 goto cleanup;
1628         }
1629         if (min_size > 0 && F_LENGTH(file) < min_size) {
1630                 if (verbose > 1) {
1631                         if (solo_file)
1632                                 fname = f_name(file, NULL);
1633                         rprintf(FINFO, "%s is under min-size\n", fname);
1634                 }
1635                 goto cleanup;
1636         }
1637
1638         if (ignore_existing > 0 && statret == 0) {
1639                 if (verbose > 1)
1640                         rprintf(FINFO, "%s exists\n", fname);
1641                 goto cleanup;
1642         }
1643
1644         if (update_only > 0 && statret == 0
1645             && cmp_time(sx.st.st_mtime, file->modtime) > 0) {
1646                 if (verbose > 1)
1647                         rprintf(FINFO, "%s is newer\n", fname);
1648                 goto cleanup;
1649         }
1650
1651         fnamecmp = fname;
1652         fnamecmp_type = FNAMECMP_FNAME;
1653
1654         if (statret == 0 && !S_ISREG(sx.st.st_mode)) {
1655                 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_FILE) != 0)
1656                         goto cleanup;
1657                 statret = -1;
1658                 stat_errno = ENOENT;
1659         }
1660
1661         if (statret != 0 && basis_dir[0] != NULL) {
1662                 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &sx,
1663                                       itemizing, code);
1664                 if (j == -2) {
1665                         if (remove_source_files == 1)
1666                                 goto return_with_success;
1667                         goto cleanup;
1668                 }
1669                 if (j >= 0) {
1670                         fnamecmp = fnamecmpbuf;
1671                         fnamecmp_type = j;
1672                         statret = 0;
1673                 }
1674         }
1675
1676         real_ret = statret;
1677         real_sx = sx;
1678
1679         if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1680             && link_stat(partialptr, &partial_st, 0) == 0
1681             && S_ISREG(partial_st.st_mode)) {
1682                 if (statret != 0)
1683                         goto prepare_to_open;
1684         } else
1685                 partialptr = NULL;
1686
1687         if (statret != 0 && fuzzy_dirlist && dry_run <= 1) {
1688                 int j = find_fuzzy(file, fuzzy_dirlist);
1689                 if (j >= 0) {
1690                         fuzzy_file = fuzzy_dirlist->files[j];
1691                         f_name(fuzzy_file, fnamecmpbuf);
1692                         if (verbose > 2) {
1693                                 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1694                                         fname, fnamecmpbuf);
1695                         }
1696                         sx.st.st_size = F_LENGTH(fuzzy_file);
1697                         statret = 0;
1698                         fnamecmp = fnamecmpbuf;
1699                         fnamecmp_type = FNAMECMP_FUZZY;
1700                 }
1701         }
1702
1703         if (statret != 0) {
1704 #ifdef SUPPORT_HARD_LINKS
1705                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1706                         cur_flist->in_progress++;
1707                         goto cleanup;
1708                 }
1709 #endif
1710                 if (stat_errno == ENOENT)
1711                         goto notify_others;
1712                 rsyserr(FERROR_XFER, stat_errno, "recv_generator: failed to stat %s",
1713                         full_fname(fname));
1714                 goto cleanup;
1715         }
1716
1717         if (append_mode > 0 && sx.st.st_size >= F_LENGTH(file))
1718                 goto cleanup;
1719
1720         if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1721                 ;
1722         else if (fnamecmp_type == FNAMECMP_FUZZY)
1723                 ;
1724         else if (unchanged_file(fnamecmp, file, &sx.st)) {
1725                 if (partialptr) {
1726                         do_unlink(partialptr);
1727                         handle_partial_dir(partialptr, PDIR_DELETE);
1728                 }
1729                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1730                 if (itemizing)
1731                         itemize(fnamecmp, file, ndx, statret, &sx, 0, 0, NULL);
1732 #ifdef SUPPORT_HARD_LINKS
1733                 if (preserve_hard_links && F_IS_HLINKED(file))
1734                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1735 #endif
1736                 if (remove_source_files != 1)
1737                         goto cleanup;
1738           return_with_success:
1739                 if (!dry_run)
1740                         send_msg_int(MSG_SUCCESS, ndx);
1741                 goto cleanup;
1742         }
1743
1744   prepare_to_open:
1745         if (partialptr) {
1746                 sx.st = partial_st;
1747                 fnamecmp = partialptr;
1748                 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1749                 statret = 0;
1750         }
1751
1752         if (!do_xfers)
1753                 goto notify_others;
1754
1755         if (read_batch || whole_file) {
1756                 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1757                         if (!(backupptr = get_backup_name(fname)))
1758                                 goto cleanup;
1759                         if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
1760                                 goto pretend_missing;
1761                         if (copy_file(fname, backupptr, -1, back_file->mode, 1) < 0) {
1762                                 unmake_file(back_file);
1763                                 back_file = NULL;
1764                                 goto cleanup;
1765                         }
1766                 }
1767                 goto notify_others;
1768         }
1769
1770         if (fuzzy_dirlist) {
1771                 int j = flist_find(fuzzy_dirlist, file);
1772                 if (j >= 0) /* don't use changing file as future fuzzy basis */
1773                         fuzzy_dirlist->files[j]->flags |= FLAG_FILE_SENT;
1774         }
1775
1776         /* open the file */
1777         if ((fd = do_open(fnamecmp, O_RDONLY, 0)) < 0) {
1778                 rsyserr(FERROR, errno, "failed to open %s, continuing",
1779                         full_fname(fnamecmp));
1780           pretend_missing:
1781                 /* pretend the file didn't exist */
1782 #ifdef SUPPORT_HARD_LINKS
1783                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1784                         cur_flist->in_progress++;
1785                         goto cleanup;
1786                 }
1787 #endif
1788                 statret = real_ret = -1;
1789                 goto notify_others;
1790         }
1791
1792         if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1793                 if (!(backupptr = get_backup_name(fname))) {
1794                         close(fd);
1795                         goto cleanup;
1796                 }
1797                 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1798                         close(fd);
1799                         goto pretend_missing;
1800                 }
1801                 if (robust_unlink(backupptr) && errno != ENOENT) {
1802                         rsyserr(FERROR_XFER, errno, "unlink %s",
1803                                 full_fname(backupptr));
1804                         unmake_file(back_file);
1805                         back_file = NULL;
1806                         close(fd);
1807                         goto cleanup;
1808                 }
1809                 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0
1810                  && (errno != ENOENT || make_bak_dir(backupptr) < 0
1811                   || (f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0)) {
1812                         rsyserr(FERROR_XFER, errno, "open %s",
1813                                 full_fname(backupptr));
1814                         unmake_file(back_file);
1815                         back_file = NULL;
1816                         close(fd);
1817                         goto cleanup;
1818                 }
1819                 fnamecmp_type = FNAMECMP_BACKUP;
1820         }
1821
1822         if (verbose > 3) {
1823                 rprintf(FINFO, "gen mapped %s of size %.0f\n",
1824                         fnamecmp, (double)sx.st.st_size);
1825         }
1826
1827         if (verbose > 2)
1828                 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1829
1830   notify_others:
1831         if (remove_source_files && !delay_updates && !phase)
1832                 increment_active_files(ndx, itemizing, code);
1833         if (inc_recurse && !dry_run)
1834                 cur_flist->in_progress++;
1835 #ifdef SUPPORT_HARD_LINKS
1836         if (preserve_hard_links && F_IS_HLINKED(file))
1837                 file->flags |= FLAG_FILE_SENT;
1838 #endif
1839         write_ndx(f_out, ndx);
1840         if (itemizing) {
1841                 int iflags = ITEM_TRANSFER;
1842                 if (always_checksum > 0)
1843                         iflags |= ITEM_REPORT_CHECKSUM;
1844                 if (fnamecmp_type != FNAMECMP_FNAME)
1845                         iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1846                 if (fnamecmp_type == FNAMECMP_FUZZY)
1847                         iflags |= ITEM_XNAME_FOLLOWS;
1848                 itemize(fnamecmp, file, -1, real_ret, &real_sx, iflags, fnamecmp_type,
1849                         fuzzy_file ? fuzzy_file->basename : NULL);
1850 #ifdef SUPPORT_ACLS
1851                 if (preserve_acls)
1852                         free_acl(&real_sx);
1853 #endif
1854 #ifdef SUPPORT_XATTRS
1855                 if (preserve_xattrs)
1856                         free_xattr(&real_sx);
1857 #endif
1858         }
1859
1860         if (!do_xfers) {
1861 #ifdef SUPPORT_HARD_LINKS
1862                 if (preserve_hard_links && F_IS_HLINKED(file))
1863                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1864 #endif
1865                 goto cleanup;
1866         }
1867         if (read_batch)
1868                 goto cleanup;
1869
1870         if (statret != 0 || whole_file)
1871                 write_sum_head(f_out, NULL);
1872         else {
1873                 generate_and_send_sums(fd, sx.st.st_size, f_out, f_copy);
1874                 close(fd);
1875         }
1876
1877   cleanup:
1878         if (back_file) {
1879                 if (f_copy >= 0)
1880                         close(f_copy);
1881                 set_file_attrs(backupptr, back_file, NULL, NULL, 0);
1882                 if (verbose > 1) {
1883                         rprintf(FINFO, "backed up %s to %s\n",
1884                                 fname, backupptr);
1885                 }
1886                 unmake_file(back_file);
1887         }
1888
1889 #ifdef SUPPORT_ACLS
1890         if (preserve_acls)
1891                 free_acl(&sx);
1892 #endif
1893 #ifdef SUPPORT_XATTRS
1894         if (preserve_xattrs)
1895                 free_xattr(&sx);
1896 #endif
1897         return;
1898 }
1899
1900 static void touch_up_dirs(struct file_list *flist, int ndx)
1901 {
1902         static int counter = 0;
1903         struct file_struct *file;
1904         char *fname;
1905         int i, start, end;
1906
1907         if (ndx < 0) {
1908                 start = 0;
1909                 end = flist->used - 1;
1910         } else
1911                 start = end = ndx;
1912
1913         /* Fix any directory permissions that were modified during the
1914          * transfer and/or re-set any tweaked modified-time values. */
1915         for (i = start; i <= end; i++, counter++) {
1916                 file = flist->files[i];
1917                 if (!S_ISDIR(file->mode)
1918                  || (!implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1919                         continue;
1920                 if (verbose > 3) {
1921                         fname = f_name(file, NULL);
1922                         rprintf(FINFO, "touch_up_dirs: %s (%d)\n",
1923                                 NS(fname), i);
1924                 }
1925                 if (!F_IS_ACTIVE(file) || file->flags & FLAG_MISSING_DIR
1926                  || (!need_retouch_dir_times && file->mode & S_IWUSR))
1927                         continue;
1928                 fname = f_name(file, NULL);
1929                 if (!(file->mode & S_IWUSR))
1930                         do_chmod(fname, file->mode);
1931                 if (need_retouch_dir_times)
1932                         set_modtime(fname, file->modtime, file->mode);
1933                 if (allowed_lull && !(counter % lull_mod))
1934                         maybe_send_keepalive();
1935                 else if (!(counter & 0xFF))
1936                         maybe_flush_socket(0);
1937         }
1938 }
1939
1940 void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
1941 {
1942         struct file_struct *file;
1943         struct file_list *flist;
1944         char fbuf[MAXPATHLEN];
1945         int ndx;
1946
1947         while (1) {
1948 #ifdef SUPPORT_HARD_LINKS
1949                 if (preserve_hard_links && (ndx = get_hlink_num()) != -1) {
1950                         flist = flist_for_ndx(ndx);
1951                         assert(flist != NULL);
1952                         file = flist->files[ndx - flist->ndx_start];
1953                         assert(file->flags & FLAG_HLINKED);
1954                         finish_hard_link(file, f_name(file, fbuf), ndx, NULL, itemizing, code, -1);
1955                         flist->in_progress--;
1956                         continue;
1957                 }
1958 #endif
1959
1960                 if (check_redo && (ndx = get_redo_num()) != -1) {
1961                         csum_length = SUM_LENGTH;
1962                         max_size = -max_size;
1963                         min_size = -min_size;
1964                         ignore_existing = -ignore_existing;
1965                         ignore_non_existing = -ignore_non_existing;
1966                         update_only = -update_only;
1967                         always_checksum = -always_checksum;
1968                         size_only = -size_only;
1969                         append_mode = -append_mode;
1970                         make_backups = -make_backups; /* avoid dup backup w/inplace */
1971                         ignore_times++;
1972
1973                         flist = cur_flist;
1974                         cur_flist = flist_for_ndx(ndx);
1975
1976                         file = cur_flist->files[ndx - cur_flist->ndx_start];
1977                         if (solo_file)
1978                                 strlcpy(fbuf, solo_file, sizeof fbuf);
1979                         else
1980                                 f_name(file, fbuf);
1981                         recv_generator(fbuf, file, ndx, itemizing, code, sock_f_out);
1982                         cur_flist->to_redo--;
1983
1984                         cur_flist = flist;
1985
1986                         csum_length = SHORT_SUM_LENGTH;
1987                         max_size = -max_size;
1988                         min_size = -min_size;
1989                         ignore_existing = -ignore_existing;
1990                         ignore_non_existing = -ignore_non_existing;
1991                         update_only = -update_only;
1992                         always_checksum = -always_checksum;
1993                         size_only = -size_only;
1994                         append_mode = -append_mode;
1995                         make_backups = -make_backups;
1996                         ignore_times--;
1997                         continue;
1998                 }
1999
2000                 if (cur_flist == first_flist)
2001                         break;
2002
2003                 /* We only get here if inc_recurse is enabled. */
2004                 if (first_flist->in_progress || first_flist->to_redo)
2005                         break;
2006
2007                 if (!read_batch) {
2008                         write_ndx(sock_f_out, NDX_DONE);
2009                         maybe_flush_socket(1);
2010                 }
2011
2012                 if (delete_during == 2 || !dir_tweaking) {
2013                         /* Skip directory touch-up. */
2014                 } else if (first_flist->parent_ndx >= 0)
2015                         touch_up_dirs(dir_flist, first_flist->parent_ndx);
2016
2017                 flist_free(first_flist); /* updates first_flist */
2018         }
2019 }
2020
2021 void generate_files(int f_out, const char *local_name)
2022 {
2023         int i, ndx;
2024         char fbuf[MAXPATHLEN];
2025         int itemizing;
2026         enum logcode code;
2027         int save_do_progress = do_progress;
2028
2029         if (protocol_version >= 29) {
2030                 itemizing = 1;
2031                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2032                 code = logfile_format_has_i ? FNONE : FLOG;
2033         } else if (am_daemon) {
2034                 itemizing = logfile_format_has_i && do_xfers;
2035                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2036                 code = itemizing || !do_xfers ? FCLIENT : FINFO;
2037         } else if (!am_server) {
2038                 itemizing = stdout_format_has_i;
2039                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2040                 code = itemizing ? FNONE : FINFO;
2041         } else {
2042                 itemizing = 0;
2043                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2044                 code = FINFO;
2045         }
2046         solo_file = local_name;
2047         dir_tweaking = !(list_only || solo_file || dry_run);
2048         need_retouch_dir_times = preserve_times > 1;
2049         lull_mod = allowed_lull * 5;
2050
2051         if (verbose > 2)
2052                 rprintf(FINFO, "generator starting pid=%ld\n", (long)getpid());
2053
2054         if (delete_before && !solo_file && cur_flist->used > 0)
2055                 do_delete_pass();
2056         if (delete_during == 2) {
2057                 deldelay_size = BIGPATHBUFLEN * 4;
2058                 deldelay_buf = new_array(char, deldelay_size);
2059                 if (!deldelay_buf)
2060                         out_of_memory("delete-delay");
2061         }
2062         do_progress = 0;
2063
2064         if (append_mode > 0 || whole_file < 0)
2065                 whole_file = 0;
2066         if (verbose >= 2) {
2067                 rprintf(FINFO, "delta-transmission %s\n",
2068                         whole_file
2069                         ? "disabled for local transfer or --whole-file"
2070                         : "enabled");
2071         }
2072
2073         /* Since we often fill up the outgoing socket and then just sit around
2074          * waiting for the other 2 processes to do their thing, we don't want
2075          * to exit on a timeout.  If the data stops flowing, the receiver will
2076          * notice that and let us know via the redo pipe (or its closing). */
2077         ignore_timeout = 1;
2078
2079         dflt_perms = (ACCESSPERMS & ~orig_umask);
2080
2081         do {
2082 #ifdef SUPPORT_HARD_LINKS
2083                 if (preserve_hard_links && inc_recurse) {
2084                         while (!flist_eof && file_total < FILECNT_LOOKAHEAD/2)
2085                                 wait_for_receiver();
2086                 }
2087 #endif
2088
2089                 if (inc_recurse && cur_flist->parent_ndx >= 0) {
2090                         struct file_struct *fp = dir_flist->files[cur_flist->parent_ndx];
2091                         f_name(fp, fbuf);
2092                         ndx = cur_flist->ndx_start - 1;
2093                         recv_generator(fbuf, fp, ndx, itemizing, code, f_out);
2094                         if (delete_during && dry_run < 2 && !list_only) {
2095                                 if (BITS_SETnUNSET(fp->flags, FLAG_CONTENT_DIR, FLAG_MISSING_DIR)) {
2096                                         dev_t dirdev;
2097                                         if (one_file_system) {
2098                                                 uint32 *devp = F_DIR_DEV_P(fp);
2099                                                 dirdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
2100                                         } else
2101                                                 dirdev = MAKEDEV(0, 0);
2102                                         delete_in_dir(f_name(fp, fbuf), fp, &dirdev);
2103                                 }
2104                         }
2105                 }
2106                 for (i = cur_flist->low; i <= cur_flist->high; i++) {
2107                         struct file_struct *file = cur_flist->sorted[i];
2108
2109                         if (!F_IS_ACTIVE(file))
2110                                 continue;
2111
2112                         if (unsort_ndx)
2113                                 ndx = F_NDX(file);
2114                         else
2115                                 ndx = i + cur_flist->ndx_start;
2116
2117                         if (solo_file)
2118                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2119                         else
2120                                 f_name(file, fbuf);
2121                         recv_generator(fbuf, file, ndx, itemizing, code, f_out);
2122
2123                         check_for_finished_files(itemizing, code, 0);
2124
2125                         if (allowed_lull && !(i % lull_mod))
2126                                 maybe_send_keepalive();
2127                         else if (!(i & 0xFF))
2128                                 maybe_flush_socket(0);
2129                 }
2130
2131                 if (!inc_recurse) {
2132                         write_ndx(f_out, NDX_DONE);
2133                         break;
2134                 }
2135
2136                 while (1) {
2137                         check_for_finished_files(itemizing, code, 1);
2138                         if (cur_flist->next || flist_eof)
2139                                 break;
2140                         wait_for_receiver();
2141                 }
2142         } while ((cur_flist = cur_flist->next) != NULL);
2143
2144         if (delete_during)
2145                 delete_in_dir(NULL, NULL, &dev_zero);
2146         phase++;
2147         if (verbose > 2)
2148                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2149
2150         while (1) {
2151                 check_for_finished_files(itemizing, code, 1);
2152                 if (msgdone_cnt)
2153                         break;
2154                 wait_for_receiver();
2155         }
2156
2157         phase++;
2158         if (verbose > 2)
2159                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2160
2161         write_ndx(f_out, NDX_DONE);
2162         /* Reduce round-trip lag-time for a useless delay-updates phase. */
2163         if (protocol_version >= 29 && !delay_updates)
2164                 write_ndx(f_out, NDX_DONE);
2165
2166         /* Read MSG_DONE for the redo phase (and any prior messages). */
2167         while (1) {
2168                 check_for_finished_files(itemizing, code, 0);
2169                 if (msgdone_cnt > 1)
2170                         break;
2171                 wait_for_receiver();
2172         }
2173
2174         if (protocol_version >= 29) {
2175                 phase++;
2176                 if (verbose > 2)
2177                         rprintf(FINFO, "generate_files phase=%d\n", phase);
2178                 if (delay_updates)
2179                         write_ndx(f_out, NDX_DONE);
2180                 /* Read MSG_DONE for delay-updates phase & prior messages. */
2181                 while (msgdone_cnt == 2)
2182                         wait_for_receiver();
2183         }
2184
2185         do_progress = save_do_progress;
2186         if (delete_during == 2)
2187                 do_delayed_deletions(fbuf);
2188         if (delete_after && !solo_file && file_total > 0)
2189                 do_delete_pass();
2190
2191         if ((need_retouch_dir_perms || need_retouch_dir_times)
2192          && dir_tweaking && (!inc_recurse || delete_during == 2))
2193                 touch_up_dirs(dir_flist, -1);
2194
2195         if (max_delete >= 0 && deletion_count > max_delete) {
2196                 rprintf(FINFO,
2197                         "Deletions stopped due to --max-delete limit (%d skipped)\n",
2198                         deletion_count - max_delete);
2199                 io_error |= IOERR_DEL_LIMIT;
2200         }
2201
2202         if (verbose > 2)
2203                 rprintf(FINFO, "generate_files finished\n");
2204 }