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