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