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) 2003-2008 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_executability;
  45 extern int preserve_perms;
  46 extern int preserve_times;
  47 extern int uid_ndx;
  48 extern int gid_ndx;
  49 extern int delete_mode;
  50 extern int delete_before;
  51 extern int delete_during;
  52 extern int delete_after;
  53 extern int msgdone_cnt;
  54 extern int ignore_errors;
  55 extern int remove_source_files;
  56 extern int delay_updates;
  57 extern int update_only;
  58 extern int ignore_existing;
  59 extern int ignore_non_existing;
  60 extern int inplace;
  61 extern int append_mode;
  62 extern int make_backups;
  63 extern int csum_length;
  64 extern int ignore_times;
  65 extern int size_only;
  66 extern OFF_T max_size;
  67 extern OFF_T min_size;
  68 extern int io_error;
  69 extern int flist_eof;
  70 extern int allowed_lull;
  71 extern int sock_f_out;
  72 extern int ignore_timeout;
  73 extern int protocol_version;
  74 extern int file_total;
  75 extern int fuzzy_basis;
  76 extern int always_checksum;
  77 extern int checksum_len;
  78 extern char *partial_dir;
  79 extern char *basis_dir[];
  80 extern int compare_dest;
  81 extern int copy_dest;
  82 extern int link_dest;
  83 extern int whole_file;
  84 extern int list_only;
  85 extern int read_batch;
  86 extern int safe_symlinks;
  87 extern long block_size; /* "long" because popt can't set an int32. */
  88 extern int unsort_ndx;
  89 extern int max_delete;
  90 extern int force_delete;
  91 extern int one_file_system;
  92 extern struct stats stats;
  93 extern dev_t filesystem_dev;
  94 extern mode_t orig_umask;
  95 extern uid_t our_uid;
  96 extern char *backup_dir;
  97 extern char *backup_suffix;
  98 extern int backup_suffix_len;
  99 extern struct file_list *cur_flist, *first_flist, *dir_flist;
 100 extern struct filter_list_struct daemon_filter_list;
 101
 102 int ignore_perishable = 0;
 103 int non_perishable_cnt = 0;
 104 int maybe_ATTRS_REPORT = 0;
 105
 106 static dev_t dev_zero;
 107 static int deletion_count = 0; /* used to implement --max-delete */
 108 static int deldelay_size = 0, deldelay_cnt = 0;
 109 static char *deldelay_buf = NULL;
 110 static int deldelay_fd = -1;
 111 static int lull_mod;
 112 static int dir_tweaking;
 113 static int symlink_timeset_failed_flags;
 114 static int need_retouch_dir_times;
 115 static int need_retouch_dir_perms;
 116 static const char *solo_file = NULL;
 117
 118 /* For calling delete_item() and delete_dir_contents(). */
 119 #define DEL_NO_UID_WRITE        (1<<0) /* file/dir has our uid w/o write perm */
 120 #define DEL_RECURSE             (1<<1) /* if dir, delete all contents */
 121 #define DEL_DIR_IS_EMPTY        (1<<2) /* internal delete_FUNCTIONS use only */
 122 #define DEL_FOR_FILE            (1<<3) /* making room for a replacement file */
 123 #define DEL_FOR_DIR             (1<<4) /* making room for a replacement dir */
 124 #define DEL_FOR_SYMLINK         (1<<5) /* making room for a replacement symlink */
 125 #define DEL_FOR_DEVICE          (1<<6) /* making room for a replacement device */
 126 #define DEL_FOR_SPECIAL         (1<<7) /* making room for a replacement special */
 127
 128 #define DEL_MAKE_ROOM (DEL_FOR_FILE|DEL_FOR_DIR|DEL_FOR_SYMLINK|DEL_FOR_DEVICE|DEL_FOR_SPECIAL)
 129
 130 enum nonregtype {
 131     TYPE_DIR, TYPE_SPECIAL, TYPE_DEVICE, TYPE_SYMLINK
 132 };
 133
 134 enum delret {
 135     DR_SUCCESS = 0, DR_FAILURE, DR_AT_LIMIT, DR_NOT_EMPTY
 136 };
 137
 138 /* Forward declarations. */
 139 static enum delret delete_dir_contents(char *fname, uint16 flags);
 140 #ifdef SUPPORT_HARD_LINKS
 141 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
 142                                  enum logcode code, int f_out);
 143 #endif
 144
 145 static int is_backup_file(char *fn)
 146 {
 147         int k = strlen(fn) - backup_suffix_len;
 148         return k > 0 && strcmp(fn+k, backup_suffix) == 0;
 149 }
 150
 151 /* Delete a file or directory.  If DEL_RECURSE is set in the flags, this will
 152  * delete recursively.
 153  *
 154  * Note that fbuf must point to a MAXPATHLEN buffer if the mode indicates it's
 155  * a directory! (The buffer is used for recursion, but returned unchanged.)
 156  */
 157 static enum delret delete_item(char *fbuf, uint16 mode, uint16 flags)
 158 {
 159         enum delret ret;
 160         char *what;
 161         int ok;
 162
 163         if (verbose > 2) {
 164                 rprintf(FINFO, "delete_item(%s) mode=%o flags=%d\n",
 165                         fbuf, (int)mode, (int)flags);
 166         }
 167
 168         if (flags & DEL_NO_UID_WRITE)
 169                 do_chmod(fbuf, mode | S_IWUSR);
 170
 171         if (S_ISDIR(mode) && !(flags & DEL_DIR_IS_EMPTY)) {
 172                 int save_uid_ndx = uid_ndx;
 173                 /* This only happens on the first call to delete_item() since
 174                  * delete_dir_contents() always calls us w/DEL_DIR_IS_EMPTY. */
 175                 if (!uid_ndx)
 176                         uid_ndx = ++file_extra_cnt;
 177                 ignore_perishable = 1;
 178                 /* If DEL_RECURSE is not set, this just reports emptiness. */
 179                 ret = delete_dir_contents(fbuf, flags);
 180                 ignore_perishable = 0;
 181                 if (!save_uid_ndx) {
 182                         --file_extra_cnt;
 183                         uid_ndx = 0;
 184                 }
 185                 if (ret == DR_NOT_EMPTY || ret == DR_AT_LIMIT)
 186                         goto check_ret;
 187                 /* OK: try to delete the directory. */
 188         }
 189
 190         if (!(flags & DEL_MAKE_ROOM) && max_delete >= 0 && ++deletion_count > max_delete)
 191                 return DR_AT_LIMIT;
 192
 193         if (S_ISDIR(mode)) {
 194                 what = "rmdir";
 195                 ok = do_rmdir(fbuf) == 0;
 196         } else if (make_backups > 0 && (backup_dir || !is_backup_file(fbuf))) {
 197                 what = "make_backup";
 198                 ok = make_backup(fbuf);
 199         } else {
 200                 what = "unlink";
 201                 ok = robust_unlink(fbuf) == 0;
 202         }
 203
 204         if (ok) {
 205                 if (!(flags & DEL_MAKE_ROOM))
 206                         log_delete(fbuf, mode);
 207                 ret = DR_SUCCESS;
 208         } else {
 209                 if (S_ISDIR(mode) && errno == ENOTEMPTY) {
 210                         rprintf(FINFO, "cannot delete non-empty directory: %s\n",
 211                                 fbuf);
 212                         ret = DR_NOT_EMPTY;
 213                 } else if (errno != ENOENT) {
 214                         rsyserr(FERROR, errno, "delete_file: %s(%s) failed",
 215                                 what, fbuf);
 216                         ret = DR_FAILURE;
 217                 } else {
 218                         deletion_count--;
 219                         ret = DR_SUCCESS;
 220                 }
 221         }
 222
 223   check_ret:
 224         if (ret != DR_SUCCESS && flags & DEL_MAKE_ROOM) {
 225                 const char *desc;
 226                 switch (flags & DEL_MAKE_ROOM) {
 227                 case DEL_FOR_FILE: desc = "regular file"; break;
 228                 case DEL_FOR_DIR: desc = "directory"; break;
 229                 case DEL_FOR_SYMLINK: desc = "symlink"; break;
 230                 case DEL_FOR_DEVICE: desc = "device file"; break;
 231                 case DEL_FOR_SPECIAL: desc = "special file"; break;
 232                 default: exit_cleanup(RERR_UNSUPPORTED); /* IMPOSSIBLE */
 233                 }
 234                 rprintf(FERROR_XFER, "could not make way for new %s: %s\n",
 235                         desc, fbuf);
 236         }
 237         return ret;
 238 }
 239
 240 /* The directory is about to be deleted: if DEL_RECURSE is given, delete all
 241  * its contents, otherwise just checks for content.  Returns DR_SUCCESS or
 242  * DR_NOT_EMPTY.  Note that fname must point to a MAXPATHLEN buffer!  (The
 243  * buffer is used for recursion, but returned unchanged.)
 244  */
 245 static enum delret delete_dir_contents(char *fname, uint16 flags)
 246 {
 247         struct file_list *dirlist;
 248         enum delret ret;
 249         unsigned remainder;
 250         void *save_filters;
 251         int j, dlen;
 252         char *p;
 253
 254         if (verbose > 3) {
 255                 rprintf(FINFO, "delete_dir_contents(%s) flags=%d\n",
 256                         fname, flags);
 257         }
 258
 259         dlen = strlen(fname);
 260         save_filters = push_local_filters(fname, dlen);
 261
 262         non_perishable_cnt = 0;
 263         dirlist = get_dirlist(fname, dlen, 0);
 264         ret = non_perishable_cnt ? DR_NOT_EMPTY : DR_SUCCESS;
 265
 266         if (!dirlist->used)
 267                 goto done;
 268
 269         if (!(flags & DEL_RECURSE)) {
 270                 ret = DR_NOT_EMPTY;
 271                 goto done;
 272         }
 273
 274         p = fname + dlen;
 275         if (dlen != 1 || *fname != '/')
 276                 *p++ = '/';
 277         remainder = MAXPATHLEN - (p - fname);
 278
 279         /* We do our own recursion, so make delete_item() non-recursive. */
 280         flags = (flags & ~(DEL_RECURSE|DEL_MAKE_ROOM|DEL_NO_UID_WRITE))
 281               | DEL_DIR_IS_EMPTY;
 282
 283         for (j = dirlist->used; j--; ) {
 284                 struct file_struct *fp = dirlist->files[j];
 285
 286                 if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) {
 287                         if (verbose > 1) {
 288                                 rprintf(FINFO,
 289                                     "mount point, %s, pins parent directory\n",
 290                                     f_name(fp, NULL));
 291                         }
 292                         ret = DR_NOT_EMPTY;
 293                         continue;
 294                 }
 295
 296                 strlcpy(p, fp->basename, remainder);
 297                 if (!(fp->mode & S_IWUSR) && !am_root && (uid_t)F_OWNER(fp) == our_uid)
 298                         do_chmod(fname, fp->mode | S_IWUSR);
 299                 /* Save stack by recursing to ourself directly. */
 300                 if (S_ISDIR(fp->mode)) {
 301                         if (delete_dir_contents(fname, flags | DEL_RECURSE) != DR_SUCCESS)
 302                                 ret = DR_NOT_EMPTY;
 303                 }
 304                 if (delete_item(fname, fp->mode, flags) != DR_SUCCESS)
 305                         ret = DR_NOT_EMPTY;
 306         }
 307
 308         fname[dlen] = '\0';
 309
 310   done:
 311         flist_free(dirlist);
 312         pop_local_filters(save_filters);
 313
 314         if (ret == DR_NOT_EMPTY) {
 315                 rprintf(FINFO, "cannot delete non-empty directory: %s\n",
 316                         fname);
 317         }
 318         return ret;
 319 }
 320
 321 static int start_delete_delay_temp(void)
 322 {
 323         char fnametmp[MAXPATHLEN];
 324         int save_dry_run = dry_run;
 325
 326         dry_run = 0;
 327         if (!get_tmpname(fnametmp, "deldelay")
 328          || (deldelay_fd = do_mkstemp(fnametmp, 0600)) < 0) {
 329                 rprintf(FINFO, "NOTE: Unable to create delete-delay temp file%s.\n",
 330                         inc_recurse ? "" : " -- switching to --delete-after");
 331                 delete_during = 0;
 332                 delete_after = !inc_recurse;
 333                 dry_run = save_dry_run;
 334                 return 0;
 335         }
 336         unlink(fnametmp);
 337         dry_run = save_dry_run;
 338         return 1;
 339 }
 340
 341 static int flush_delete_delay(void)
 342 {
 343         if (deldelay_fd < 0 && !start_delete_delay_temp())
 344                 return 0;
 345         if (write(deldelay_fd, deldelay_buf, deldelay_cnt) != deldelay_cnt) {
 346                 rsyserr(FERROR, errno, "flush of delete-delay buffer");
 347                 delete_during = 0;
 348                 delete_after = !inc_recurse;
 349                 close(deldelay_fd);
 350                 return 0;
 351         }
 352         deldelay_cnt = 0;
 353         return 1;
 354 }
 355
 356 static int remember_delete(struct file_struct *file, const char *fname, int flags)
 357 {
 358         int len;
 359
 360         if (deldelay_cnt == deldelay_size && !flush_delete_delay())
 361                 return 0;
 362
 363         if (flags & DEL_NO_UID_WRITE)
 364                 deldelay_buf[deldelay_cnt++] = '!';
 365
 366         while (1) {
 367                 len = snprintf(deldelay_buf + deldelay_cnt,
 368                                deldelay_size - deldelay_cnt,
 369                                "%x %s%c",
 370                                (int)file->mode, fname, '\0');
 371                 if ((deldelay_cnt += len) <= deldelay_size)
 372                         break;
 373                 deldelay_cnt -= len;
 374                 if (!flush_delete_delay())
 375                         return 0;
 376         }
 377
 378         return 1;
 379 }
 380
 381 static int read_delay_line(char *buf, int *flags_p)
 382 {
 383         static int read_pos = 0;
 384         int j, len, mode;
 385         char *bp, *past_space;
 386
 387         while (1) {
 388                 for (j = read_pos; j < deldelay_cnt && deldelay_buf[j]; j++) {}
 389                 if (j < deldelay_cnt)
 390                         break;
 391                 if (deldelay_fd < 0) {
 392                         if (j > read_pos)
 393                                 goto invalid_data;
 394                         return -1;
 395                 }
 396                 deldelay_cnt -= read_pos;
 397                 if (deldelay_cnt == deldelay_size)
 398                         goto invalid_data;
 399                 if (deldelay_cnt && read_pos) {
 400                         memmove(deldelay_buf, deldelay_buf + read_pos,
 401                                 deldelay_cnt);
 402                 }
 403                 len = read(deldelay_fd, deldelay_buf + deldelay_cnt,
 404                            deldelay_size - deldelay_cnt);
 405                 if (len == 0) {
 406                         if (deldelay_cnt) {
 407                                 rprintf(FERROR,
 408                                     "ERROR: unexpected EOF in delete-delay file.\n");
 409                         }
 410                         return -1;
 411                 }
 412                 if (len < 0) {
 413                         rsyserr(FERROR, errno,
 414                                 "reading delete-delay file");
 415                         return -1;
 416                 }
 417                 deldelay_cnt += len;
 418                 read_pos = 0;
 419         }
 420
 421         bp = deldelay_buf + read_pos;
 422         if (*bp == '!') {
 423                 bp++;
 424                 *flags_p = DEL_NO_UID_WRITE;
 425         } else
 426                 *flags_p = 0;
 427
 428         if (sscanf(bp, "%x ", &mode) != 1) {
 429           invalid_data:
 430                 rprintf(FERROR, "ERROR: invalid data in delete-delay file.\n");
 431                 return -1;
 432         }
 433         past_space = strchr(bp, ' ') + 1;
 434         len = j - read_pos - (past_space - bp) + 1; /* count the '\0' */
 435         read_pos = j + 1;
 436
 437         if (len > MAXPATHLEN) {
 438                 rprintf(FERROR, "ERROR: filename too long in delete-delay file.\n");
 439                 return -1;
 440         }
 441
 442         /* The caller needs the name in a MAXPATHLEN buffer, so we copy it
 443          * instead of returning a pointer to our buffer. */
 444         memcpy(buf, past_space, len);
 445
 446         return mode;
 447 }
 448
 449 static void do_delayed_deletions(char *delbuf)
 450 {
 451         int mode, flags;
 452
 453         if (deldelay_fd >= 0) {
 454                 if (deldelay_cnt && !flush_delete_delay())
 455                         return;
 456                 lseek(deldelay_fd, 0, 0);
 457         }
 458         while ((mode = read_delay_line(delbuf, &flags)) >= 0)
 459                 delete_item(delbuf, mode, flags | DEL_RECURSE);
 460         if (deldelay_fd >= 0)
 461                 close(deldelay_fd);
 462 }
 463
 464 /* This function is used to implement per-directory deletion, and is used by
 465  * all the --delete-WHEN options.  Note that the fbuf pointer must point to a
 466  * MAXPATHLEN buffer with the name of the directory in it (the functions we
 467  * call will append names onto the end, but the old dir value will be restored
 468  * on exit). */
 469 static void delete_in_dir(char *fbuf, struct file_struct *file, dev_t *fs_dev)
 470 {
 471         static int already_warned = 0;
 472         struct file_list *dirlist;
 473         char delbuf[MAXPATHLEN];
 474         int dlen, i;
 475         int save_uid_ndx = uid_ndx;
 476
 477         if (!fbuf) {
 478                 change_local_filter_dir(NULL, 0, 0);
 479                 return;
 480         }
 481
 482         if (verbose > 2)
 483                 rprintf(FINFO, "delete_in_dir(%s)\n", fbuf);
 484
 485         if (allowed_lull)
 486                 maybe_send_keepalive();
 487
 488         if (io_error && !ignore_errors) {
 489                 if (already_warned)
 490                         return;
 491                 rprintf(FINFO,
 492                         "IO error encountered -- skipping file deletion\n");
 493                 already_warned = 1;
 494                 return;
 495         }
 496
 497         dlen = strlen(fbuf);
 498         change_local_filter_dir(fbuf, dlen, F_DEPTH(file));
 499
 500         if (one_file_system) {
 501                 if (file->flags & FLAG_TOP_DIR)
 502                         filesystem_dev = *fs_dev;
 503                 else if (filesystem_dev != *fs_dev)
 504                         return;
 505         }
 506
 507         if (!uid_ndx)
 508                 uid_ndx = ++file_extra_cnt;
 509
 510         dirlist = get_dirlist(fbuf, dlen, 0);
 511
 512         /* If an item in dirlist is not found in flist, delete it
 513          * from the filesystem. */
 514         for (i = dirlist->used; i--; ) {
 515                 struct file_struct *fp = dirlist->files[i];
 516                 if (!F_IS_ACTIVE(fp))
 517                         continue;
 518                 if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) {
 519                         if (verbose > 1)
 520                                 rprintf(FINFO, "cannot delete mount point: %s\n",
 521                                         f_name(fp, NULL));
 522                         continue;
 523                 }
 524                 if (flist_find(cur_flist, fp) < 0) {
 525                         int flags = DEL_RECURSE;
 526                         if (!(fp->mode & S_IWUSR) && !am_root && (uid_t)F_OWNER(fp) == our_uid)
 527                                 flags |= DEL_NO_UID_WRITE;
 528                         f_name(fp, delbuf);
 529                         if (delete_during == 2) {
 530                                 if (!remember_delete(fp, delbuf, flags))
 531                                         break;
 532                         } else
 533                                 delete_item(delbuf, fp->mode, flags);
 534                 }
 535         }
 536
 537         flist_free(dirlist);
 538
 539         if (!save_uid_ndx) {
 540                 --file_extra_cnt;
 541                 uid_ndx = 0;
 542         }
 543 }
 544
 545 /* This deletes any files on the receiving side that are not present on the
 546  * sending side.  This is used by --delete-before and --delete-after. */
 547 static void do_delete_pass(void)
 548 {
 549         char fbuf[MAXPATHLEN];
 550         STRUCT_STAT st;
 551         int j;
 552
 553         /* dry_run is incremented when the destination doesn't exist yet. */
 554         if (dry_run > 1 || list_only)
 555                 return;
 556
 557         for (j = 0; j < cur_flist->used; j++) {
 558                 struct file_struct *file = cur_flist->sorted[j];
 559
 560                 f_name(file, fbuf);
 561
 562                 if (!(file->flags & FLAG_CONTENT_DIR)) {
 563                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(file));
 564                         continue;
 565                 }
 566
 567                 if (verbose > 1 && file->flags & FLAG_TOP_DIR)
 568                         rprintf(FINFO, "deleting in %s\n", fbuf);
 569
 570                 if (link_stat(fbuf, &st, keep_dirlinks) < 0
 571                  || !S_ISDIR(st.st_mode))
 572                         continue;
 573
 574                 delete_in_dir(fbuf, file, &st.st_dev);
 575         }
 576         delete_in_dir(NULL, NULL, &dev_zero);
 577
 578         if (do_progress && !am_server)
 579                 rprintf(FINFO, "                    \r");
 580 }
 581
 582 int unchanged_attrs(const char *fname, struct file_struct *file, stat_x *sxp)
 583 {
 584 #if !defined HAVE_LUTIMES || !defined HAVE_UTIMES
 585         if (S_ISLNK(file->mode)) {
 586                 ;
 587         } else
 588 #endif
 589         if (preserve_times && cmp_time(sxp->st.st_mtime, file->modtime) != 0)
 590                 return 0;
 591
 592         if (preserve_perms) {
 593                 if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
 594                         return 0;
 595         } else if (preserve_executability
 596          && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
 597                 return 0;
 598
 599         if (am_root && uid_ndx && sxp->st.st_uid != (uid_t)F_OWNER(file))
 600                 return 0;
 601
 602         if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP) && sxp->st.st_gid != (gid_t)F_GROUP(file))
 603                 return 0;
 604
 605 #ifdef SUPPORT_ACLS
 606         if (preserve_acls && !S_ISLNK(file->mode)) {
 607                 if (!ACL_READY(*sxp))
 608                         get_acl(fname, sxp);
 609                 if (set_acl(NULL, file, sxp) == 0)
 610                         return 0;
 611         }
 612 #endif
 613 #ifdef SUPPORT_XATTRS
 614         if (preserve_xattrs) {
 615                 if (!XATTR_READY(*sxp))
 616                         get_xattr(fname, sxp);
 617                 if (xattr_diff(file, sxp, 0))
 618                         return 0;
 619         }
 620 #endif
 621
 622         return 1;
 623 }
 624
 625 void itemize(const char *fnamecmp, struct file_struct *file, int ndx, int statret,
 626              stat_x *sxp, int32 iflags, uchar fnamecmp_type,
 627              const char *xname)
 628 {
 629         if (statret >= 0) { /* A from-dest-dir statret can == 1! */
 630                 int keep_time = !preserve_times ? 0
 631                     : S_ISDIR(file->mode) ? preserve_times > 1 :
 632 #if defined HAVE_LUTIMES && defined HAVE_UTIMES
 633                     1;
 634 #else
 635                     !S_ISLNK(file->mode);
 636 #endif
 637
 638                 if (S_ISREG(file->mode) && F_LENGTH(file) != sxp->st.st_size)
 639                         iflags |= ITEM_REPORT_SIZE;
 640                 if (file->flags & FLAG_TIME_FAILED) { /* symlinks only */
 641                         if (iflags & ITEM_LOCAL_CHANGE)
 642                                 iflags |= symlink_timeset_failed_flags;
 643                 } else if (keep_time
 644                  ? cmp_time(file->modtime, sxp->st.st_mtime) != 0
 645                  : iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !(iflags & ITEM_MATCHED)
 646                   && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
 647                         iflags |= ITEM_REPORT_TIME;
 648 #if !defined HAVE_LCHMOD && !defined HAVE_SETATTRLIST
 649                 if (S_ISLNK(file->mode)) {
 650                         ;
 651                 } else
 652 #endif
 653                 if (preserve_perms) {
 654                         if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
 655                                 iflags |= ITEM_REPORT_PERMS;
 656                 } else if (preserve_executability
 657                  && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
 658                         iflags |= ITEM_REPORT_PERMS;
 659                 if (uid_ndx && am_root && (uid_t)F_OWNER(file) != sxp->st.st_uid)
 660                         iflags |= ITEM_REPORT_OWNER;
 661                 if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP)
 662                     && sxp->st.st_gid != (gid_t)F_GROUP(file))
 663                         iflags |= ITEM_REPORT_GROUP;
 664 #ifdef SUPPORT_ACLS
 665                 if (preserve_acls && !S_ISLNK(file->mode)) {
 666                         if (!ACL_READY(*sxp))
 667                                 get_acl(fnamecmp, sxp);
 668                         if (set_acl(NULL, file, sxp) == 0)
 669                                 iflags |= ITEM_REPORT_ACL;
 670                 }
 671 #endif
 672 #ifdef SUPPORT_XATTRS
 673                 if (preserve_xattrs) {
 674                         if (!XATTR_READY(*sxp))
 675                                 get_xattr(fnamecmp, sxp);
 676                         if (xattr_diff(file, sxp, 1))
 677                                 iflags |= ITEM_REPORT_XATTR;
 678                 }
 679 #endif
 680         } else {
 681 #ifdef SUPPORT_XATTRS
 682                 if (preserve_xattrs && xattr_diff(file, NULL, 1))
 683                         iflags |= ITEM_REPORT_XATTR;
 684 #endif
 685                 iflags |= ITEM_IS_NEW;
 686         }
 687
 688         iflags &= 0xffff;
 689         if ((iflags & (SIGNIFICANT_ITEM_FLAGS|ITEM_REPORT_XATTR) || verbose > 1
 690           || stdout_format_has_i > 1 || (xname && *xname)) && !read_batch) {
 691                 if (protocol_version >= 29) {
 692                         if (ndx >= 0)
 693                                 write_ndx(sock_f_out, ndx);
 694                         write_shortint(sock_f_out, iflags);
 695                         if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
 696                                 write_byte(sock_f_out, fnamecmp_type);
 697                         if (iflags & ITEM_XNAME_FOLLOWS)
 698                                 write_vstring(sock_f_out, xname, strlen(xname));
 699 #ifdef SUPPORT_XATTRS
 700                         if (iflags & ITEM_REPORT_XATTR && !dry_run)
 701                                 send_xattr_request(NULL, file, sock_f_out);
 702 #endif
 703                 } else if (ndx >= 0) {
 704                         enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
 705                         log_item(code, file, &stats, iflags, xname);
 706                 }
 707         }
 708 }
 709
 710
 711 /* Perform our quick-check heuristic for determining if a file is unchanged. */
 712 int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
 713 {
 714         if (st->st_size != F_LENGTH(file))
 715                 return 0;
 716
 717         /* if always checksum is set then we use the checksum instead
 718            of the file time to determine whether to sync */
 719         if (always_checksum > 0 && S_ISREG(st->st_mode)) {
 720                 char sum[MAX_DIGEST_LEN];
 721                 file_checksum(fn, sum, st->st_size);
 722                 return memcmp(sum, F_SUM(file), checksum_len) == 0;
 723         }
 724
 725         if (size_only > 0)
 726                 return 1;
 727
 728         if (ignore_times)
 729                 return 0;
 730
 731         return cmp_time(st->st_mtime, file->modtime) == 0;
 732 }
 733
 734
 735 /*
 736  * set (initialize) the size entries in the per-file sum_struct
 737  * calculating dynamic block and checksum sizes.
 738  *
 739  * This is only called from generate_and_send_sums() but is a separate
 740  * function to encapsulate the logic.
 741  *
 742  * The block size is a rounded square root of file length.
 743  *
 744  * The checksum size is determined according to:
 745  *     blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
 746  * provided by Donovan Baarda which gives a probability of rsync
 747  * algorithm corrupting data and falling back using the whole md4
 748  * checksums.
 749  *
 750  * This might be made one of several selectable heuristics.
 751  */
 752 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
 753 {
 754         int32 blength;
 755         int s2length;
 756         int64 l;
 757
 758         if (block_size)
 759                 blength = block_size;
 760         else if (len <= BLOCK_SIZE * BLOCK_SIZE)
 761                 blength = BLOCK_SIZE;
 762         else {
 763                 int32 c;
 764                 int cnt;
 765                 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
 766                 if (cnt >= 31 || c >= MAX_BLOCK_SIZE)
 767                         blength = MAX_BLOCK_SIZE;
 768                 else {
 769                     blength = 0;
 770                     do {
 771                             blength |= c;
 772                             if (len < (int64)blength * blength)
 773                                     blength &= ~c;
 774                             c >>= 1;
 775                     } while (c >= 8);   /* round to multiple of 8 */
 776                     blength = MAX(blength, BLOCK_SIZE);
 777                 }
 778         }
 779
 780         if (protocol_version < 27) {
 781                 s2length = csum_length;
 782         } else if (csum_length == SUM_LENGTH) {
 783                 s2length = SUM_LENGTH;
 784         } else {
 785                 int32 c;
 786                 int b = BLOCKSUM_BIAS;
 787                 for (l = len; l >>= 1; b += 2) {}
 788                 for (c = blength; (c >>= 1) && b; b--) {}
 789                 /* add a bit, subtract rollsum, round up. */
 790                 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
 791                 s2length = MAX(s2length, csum_length);
 792                 s2length = MIN(s2length, SUM_LENGTH);
 793         }
 794
 795         sum->flength    = len;
 796         sum->blength    = blength;
 797         sum->s2length   = s2length;
 798         sum->remainder  = (int32)(len % blength);
 799         sum->count      = (int32)(l = (len / blength) + (sum->remainder != 0));
 800
 801         if ((int64)sum->count != l)
 802                 sum->count = -1;
 803
 804         if (sum->count && verbose > 2) {
 805                 rprintf(FINFO,
 806                         "count=%.0f rem=%ld blength=%ld s2length=%d flength=%.0f\n",
 807                         (double)sum->count, (long)sum->remainder, (long)sum->blength,
 808                         sum->s2length, (double)sum->flength);
 809         }
 810 }
 811
 812
 813 /*
 814  * Generate and send a stream of signatures/checksums that describe a buffer
 815  *
 816  * Generate approximately one checksum every block_len bytes.
 817  */
 818 static int generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
 819 {
 820         int32 i;
 821         struct map_struct *mapbuf;
 822         struct sum_struct sum;
 823         OFF_T offset = 0;
 824
 825         sum_sizes_sqroot(&sum, len);
 826         if (sum.count < 0)
 827                 return -1;
 828         write_sum_head(f_out, &sum);
 829
 830         if (append_mode > 0 && f_copy < 0)
 831                 return 0;
 832
 833         if (len > 0)
 834                 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
 835         else
 836                 mapbuf = NULL;
 837
 838         for (i = 0; i < sum.count; i++) {
 839                 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
 840                 char *map = map_ptr(mapbuf, offset, n1);
 841                 char sum2[SUM_LENGTH];
 842                 uint32 sum1;
 843
 844                 len -= n1;
 845                 offset += n1;
 846
 847                 if (f_copy >= 0) {
 848                         full_write(f_copy, map, n1);
 849                         if (append_mode > 0)
 850                                 continue;
 851                 }
 852
 853                 sum1 = get_checksum1(map, n1);
 854                 get_checksum2(map, n1, sum2);
 855
 856                 if (verbose > 3) {
 857                         rprintf(FINFO,
 858                                 "chunk[%.0f] offset=%.0f len=%ld sum1=%08lx\n",
 859                                 (double)i, (double)offset - n1, (long)n1,
 860                                 (unsigned long)sum1);
 861                 }
 862                 write_int(f_out, sum1);
 863                 write_buf(f_out, sum2, sum.s2length);
 864         }
 865
 866         if (mapbuf)
 867                 unmap_file(mapbuf);
 868
 869         return 0;
 870 }
 871
 872
 873 /* Try to find a filename in the same dir as "fname" with a similar name. */
 874 static int find_fuzzy(struct file_struct *file, struct file_list *dirlist)
 875 {
 876         int fname_len, fname_suf_len;
 877         const char *fname_suf, *fname = file->basename;
 878         uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
 879         int j, lowest_j = -1;
 880
 881         fname_len = strlen(fname);
 882         fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
 883
 884         for (j = 0; j < dirlist->used; j++) {
 885                 struct file_struct *fp = dirlist->files[j];
 886                 const char *suf, *name;
 887                 int len, suf_len;
 888                 uint32 dist;
 889
 890                 if (!S_ISREG(fp->mode) || !F_LENGTH(fp)
 891                  || fp->flags & FLAG_FILE_SENT)
 892                         continue;
 893
 894                 name = fp->basename;
 895
 896                 if (F_LENGTH(fp) == F_LENGTH(file)
 897                     && cmp_time(fp->modtime, file->modtime) == 0) {
 898                         if (verbose > 4) {
 899                                 rprintf(FINFO,
 900                                         "fuzzy size/modtime match for %s\n",
 901                                         name);
 902                         }
 903                         return j;
 904                 }
 905
 906                 len = strlen(name);
 907                 suf = find_filename_suffix(name, len, &suf_len);
 908
 909                 dist = fuzzy_distance(name, len, fname, fname_len);
 910                 /* Add some extra weight to how well the suffixes match. */
 911                 dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len)
 912                       * 10;
 913                 if (verbose > 4) {
 914                         rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
 915                                 name, (int)(dist>>16), (int)(dist&0xFFFF));
 916                 }
 917                 if (dist <= lowest_dist) {
 918                         lowest_dist = dist;
 919                         lowest_j = j;
 920                 }
 921         }
 922
 923         return lowest_j;
 924 }
 925
 926 /* Copy a file found in our --copy-dest handling. */
 927 static int copy_altdest_file(const char *src, const char *dest, struct file_struct *file)
 928 {
 929         char buf[MAXPATHLEN];
 930         const char *copy_to, *partialptr;
 931         int save_preserve_xattrs = preserve_xattrs;
 932         int ok, fd_w;
 933
 934         if (inplace) {
 935                 /* Let copy_file open the destination in place. */
 936                 fd_w = -1;
 937                 copy_to = dest;
 938         } else {
 939                 fd_w = open_tmpfile(buf, dest, file);
 940                 if (fd_w < 0)
 941                         return -1;
 942                 copy_to = buf;
 943         }
 944         cleanup_set(copy_to, NULL, NULL, -1, -1);
 945         if (copy_file(src, copy_to, fd_w, file->mode, 0) < 0) {
 946                 if (verbose) {
 947                         rsyserr(FINFO, errno, "copy_file %s => %s",
 948                                 full_fname(src), copy_to);
 949                 }
 950                 /* Try to clean up. */
 951                 unlink(copy_to);
 952                 cleanup_disable();
 953                 return -1;
 954         }
 955         partialptr = partial_dir ? partial_dir_fname(dest) : NULL;
 956         preserve_xattrs = 0; /* xattrs were copied with file */
 957         ok = finish_transfer(dest, copy_to, src, partialptr, file, 1, 0);
 958         preserve_xattrs = save_preserve_xattrs;
 959         cleanup_disable();
 960         return ok ? 0 : -1;
 961 }
 962
 963 /* This is only called for regular files.  We return -2 if we've finished
 964  * handling the file, -1 if no dest-linking occurred, or a non-negative
 965  * value if we found an alternate basis file. */
 966 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
 967                          char *cmpbuf, stat_x *sxp, int itemizing,
 968                          enum logcode code)
 969 {
 970         int best_match = -1;
 971         int match_level = 0;
 972         int j = 0;
 973
 974         do {
 975                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 976                 if (link_stat(cmpbuf, &sxp->st, 0) < 0 || !S_ISREG(sxp->st.st_mode))
 977                         continue;
 978                 switch (match_level) {
 979                 case 0:
 980                         best_match = j;
 981                         match_level = 1;
 982                         /* FALL THROUGH */
 983                 case 1:
 984                         if (!unchanged_file(cmpbuf, file, &sxp->st))
 985                                 continue;
 986                         best_match = j;
 987                         match_level = 2;
 988                         /* FALL THROUGH */
 989                 case 2:
 990                         if (!unchanged_attrs(cmpbuf, file, sxp))
 991                                 continue;
 992                         best_match = j;
 993                         match_level = 3;
 994                         break;
 995                 }
 996                 break;
 997         } while (basis_dir[++j] != NULL);
 998
 999         if (!match_level)
1000                 return -1;
1001
1002         if (j != best_match) {
1003                 j = best_match;
1004                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1005                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1006                         return -1;
1007         }
1008
1009         if (match_level == 3 && !copy_dest) {
1010 #ifdef SUPPORT_HARD_LINKS
1011                 if (link_dest) {
1012                         if (!hard_link_one(file, fname, cmpbuf, 1))
1013                                 goto try_a_copy;
1014                         if (preserve_hard_links && F_IS_HLINKED(file))
1015                                 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, j);
1016                         if (!maybe_ATTRS_REPORT && (verbose > 1 || stdout_format_has_i > 1)) {
1017                                 itemize(cmpbuf, file, ndx, 1, sxp,
1018                                         ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS,
1019                                         0, "");
1020                         }
1021                 } else
1022 #endif
1023                 if (itemizing)
1024                         itemize(cmpbuf, file, ndx, 0, sxp, 0, 0, NULL);
1025                 if (verbose > 1 && maybe_ATTRS_REPORT)
1026                         rprintf(FCLIENT, "%s is uptodate\n", fname);
1027                 return -2;
1028         }
1029
1030         if (match_level >= 2) {
1031 #ifdef SUPPORT_HARD_LINKS
1032           try_a_copy: /* Copy the file locally. */
1033 #endif
1034                 if (!dry_run && copy_altdest_file(cmpbuf, fname, file) < 0)
1035                         return -1;
1036                 if (itemizing)
1037                         itemize(cmpbuf, file, ndx, 0, sxp, ITEM_LOCAL_CHANGE, 0, NULL);
1038                 if (maybe_ATTRS_REPORT
1039                  && ((!itemizing && verbose && match_level == 2)
1040                   || (verbose > 1 && match_level == 3))) {
1041                         code = match_level == 3 ? FCLIENT : FINFO;
1042                         rprintf(code, "%s%s\n", fname,
1043                                 match_level == 3 ? " is uptodate" : "");
1044                 }
1045 #ifdef SUPPORT_HARD_LINKS
1046                 if (preserve_hard_links && F_IS_HLINKED(file))
1047                         finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, -1);
1048 #endif
1049                 return -2;
1050         }
1051
1052         return FNAMECMP_BASIS_DIR_LOW + j;
1053 }
1054
1055 /* This is only called for non-regular files.  We return -2 if we've finished
1056  * handling the file, or -1 if no dest-linking occurred, or a non-negative
1057  * value if we found an alternate basis file. */
1058 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
1059                          char *cmpbuf, stat_x *sxp, int itemizing,
1060                          enum logcode code)
1061 {
1062         char lnk[MAXPATHLEN];
1063         int best_match = -1;
1064         int match_level = 0;
1065         enum nonregtype type;
1066         uint32 *devp;
1067         int len, j = 0;
1068
1069 #ifndef SUPPORT_LINKS
1070         if (S_ISLNK(file->mode))
1071                 return -1;
1072 #endif
1073         if (S_ISDIR(file->mode)) {
1074                 type = TYPE_DIR;
1075         } else if (IS_SPECIAL(file->mode))
1076                 type = TYPE_SPECIAL;
1077         else if (IS_DEVICE(file->mode))
1078                 type = TYPE_DEVICE;
1079 #ifdef SUPPORT_LINKS
1080         else if (S_ISLNK(file->mode))
1081                 type = TYPE_SYMLINK;
1082 #endif
1083         else {
1084                 rprintf(FERROR,
1085                         "internal: try_dests_non() called with invalid mode (%o)\n",
1086                         (int)file->mode);
1087                 exit_cleanup(RERR_UNSUPPORTED);
1088         }
1089
1090         do {
1091                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1092                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1093                         continue;
1094                 switch (type) {
1095                 case TYPE_DIR:
1096                         if (!S_ISDIR(sxp->st.st_mode))
1097                                 continue;
1098                         break;
1099                 case TYPE_SPECIAL:
1100                         if (!IS_SPECIAL(sxp->st.st_mode))
1101                                 continue;
1102                         break;
1103                 case TYPE_DEVICE:
1104                         if (!IS_DEVICE(sxp->st.st_mode))
1105                                 continue;
1106                         break;
1107 #ifdef SUPPORT_LINKS
1108                 case TYPE_SYMLINK:
1109                         if (!S_ISLNK(sxp->st.st_mode))
1110                                 continue;
1111                         break;
1112 #endif
1113                 }
1114                 if (match_level < 1) {
1115                         match_level = 1;
1116                         best_match = j;
1117                 }
1118                 switch (type) {
1119                 case TYPE_DIR:
1120                         break;
1121                 case TYPE_SPECIAL:
1122                 case TYPE_DEVICE:
1123                         devp = F_RDEV_P(file);
1124                         if (sxp->st.st_rdev != MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)))
1125                                 continue;
1126                         break;
1127 #ifdef SUPPORT_LINKS
1128                 case TYPE_SYMLINK:
1129                         if ((len = readlink(cmpbuf, lnk, MAXPATHLEN-1)) <= 0)
1130                                 continue;
1131                         lnk[len] = '\0';
1132                         if (strcmp(lnk, F_SYMLINK(file)) != 0)
1133                                 continue;
1134                         break;
1135 #endif
1136                 }
1137                 if (match_level < 2) {
1138                         match_level = 2;
1139                         best_match = j;
1140                 }
1141                 if (unchanged_attrs(cmpbuf, file, sxp)) {
1142                         match_level = 3;
1143                         best_match = j;
1144                         break;
1145                 }
1146         } while (basis_dir[++j] != NULL);
1147
1148         if (!match_level)
1149                 return -1;
1150
1151         if (j != best_match) {
1152                 j = best_match;
1153                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1154                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1155                         return -1;
1156         }
1157
1158         if (match_level == 3) {
1159 #ifdef SUPPORT_HARD_LINKS
1160                 if (link_dest
1161 #ifndef CAN_HARDLINK_SYMLINK
1162                  && !S_ISLNK(file->mode)
1163 #endif
1164 #ifndef CAN_HARDLINK_SPECIAL
1165                  && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
1166 #endif
1167                  && !S_ISDIR(file->mode)) {
1168                         if (do_link(cmpbuf, fname) < 0) {
1169                                 rsyserr(FERROR_XFER, errno,
1170                                         "failed to hard-link %s with %s",
1171                                         cmpbuf, fname);
1172                                 return j;
1173                         }
1174                         if (preserve_hard_links && F_IS_HLINKED(file))
1175                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1176                 } else
1177 #endif
1178                         match_level = 2;
1179                 if (itemizing && stdout_format_has_i
1180                  && (verbose > 1 || stdout_format_has_i > 1)) {
1181                         int chg = compare_dest && type != TYPE_DIR ? 0
1182                             : ITEM_LOCAL_CHANGE + (match_level == 3 ? ITEM_XNAME_FOLLOWS : 0);
1183                         char *lp = match_level == 3 ? "" : NULL;
1184                         itemize(cmpbuf, file, ndx, 0, sxp, chg + ITEM_MATCHED, 0, lp);
1185                 }
1186                 if (verbose > 1 && maybe_ATTRS_REPORT) {
1187                         rprintf(FCLIENT, "%s%s is uptodate\n",
1188                                 fname, type == TYPE_DIR ? "/" : "");
1189                 }
1190                 return -2;
1191         }
1192
1193         return j;
1194 }
1195
1196 static void list_file_entry(struct file_struct *f)
1197 {
1198         char permbuf[PERMSTRING_SIZE];
1199         double len;
1200
1201         if (!F_IS_ACTIVE(f)) {
1202                 /* this can happen if duplicate names were removed */
1203                 return;
1204         }
1205
1206         permstring(permbuf, f->mode);
1207         len = F_LENGTH(f);
1208
1209         /* TODO: indicate '+' if the entry has an ACL. */
1210
1211 #ifdef SUPPORT_LINKS
1212         if (preserve_links && S_ISLNK(f->mode)) {
1213                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
1214                         permbuf, len, timestring(f->modtime),
1215                         f_name(f, NULL), F_SYMLINK(f));
1216         } else
1217 #endif
1218         {
1219                 rprintf(FINFO, "%s %11.0f %s %s\n",
1220                         permbuf, len, timestring(f->modtime),
1221                         f_name(f, NULL));
1222         }
1223 }
1224
1225 static int phase = 0;
1226 static int dflt_perms;
1227
1228 static int implied_dirs_are_missing;
1229 /* Helper for recv_generator's skip_dir and dry_missing_dir tests. */
1230 static BOOL is_below(struct file_struct *file, struct file_struct *subtree)
1231 {
1232         return F_DEPTH(file) > F_DEPTH(subtree)
1233                 && (!implied_dirs_are_missing || f_name_has_prefix(file, subtree));
1234 }
1235
1236 /* Acts on the indicated item in cur_flist whose name is fname.  If a dir,
1237  * make sure it exists, and has the right permissions/timestamp info.  For
1238  * all other non-regular files (symlinks, etc.) we create them here.  For
1239  * regular files that have changed, we try to find a basis file and then
1240  * start sending checksums.  The ndx is the file's unique index value.
1241  *
1242  * The fname parameter must point to a MAXPATHLEN buffer!  (e.g it gets
1243  * passed to delete_item(), which can use it during a recursive delete.)
1244  *
1245  * Note that f_out is set to -1 when doing final directory-permission and
1246  * modification-time repair. */
1247 static void recv_generator(char *fname, struct file_struct *file, int ndx,
1248                            int itemizing, enum logcode code, int f_out)
1249 {
1250         static const char *parent_dirname = "";
1251         /* Missing dir not created due to --dry-run; will still be scanned. */
1252         static struct file_struct *dry_missing_dir = NULL;
1253         /* Missing dir whose contents are skipped altogether due to
1254          * --ignore-non-existing, daemon exclude, or mkdir failure. */
1255         static struct file_struct *skip_dir = NULL;
1256         static struct file_list *fuzzy_dirlist = NULL;
1257         static int need_fuzzy_dirlist = 0;
1258         struct file_struct *fuzzy_file = NULL;
1259         int fd = -1, f_copy = -1;
1260         stat_x sx, real_sx;
1261         STRUCT_STAT partial_st;
1262         struct file_struct *back_file = NULL;
1263         int statret, real_ret, stat_errno;
1264         char *fnamecmp, *partialptr, *backupptr = NULL;
1265         char fnamecmpbuf[MAXPATHLEN];
1266         uchar fnamecmp_type;
1267         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1268         int is_dir = !S_ISDIR(file->mode) ? 0
1269                    : inc_recurse && ndx != cur_flist->ndx_start - 1 ? -1
1270                    : 1;
1271
1272         if (verbose > 2)
1273                 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
1274
1275         if (list_only) {
1276                 if (is_dir < 0
1277                  || (is_dir && !implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1278                         return;
1279                 list_file_entry(file);
1280                 return;
1281         }
1282
1283         if (skip_dir) {
1284                 if (is_below(file, skip_dir)) {
1285                         if (is_dir)
1286                                 file->flags |= FLAG_MISSING_DIR;
1287 #ifdef SUPPORT_HARD_LINKS
1288                         else if (F_IS_HLINKED(file))
1289                                 handle_skipped_hlink(file, itemizing, code, f_out);
1290 #endif
1291                         return;
1292                 }
1293                 skip_dir = NULL;
1294         }
1295
1296         if (daemon_filter_list.head && (*fname != '.' || fname[1])) {
1297                 if (check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
1298                         if (is_dir < 0)
1299                                 return;
1300 #ifdef SUPPORT_HARD_LINKS
1301                         if (F_IS_HLINKED(file))
1302                                 handle_skipped_hlink(file, itemizing, code, f_out);
1303 #endif
1304                         rprintf(FERROR_XFER,
1305                                 "skipping daemon-excluded %s \"%s\"\n",
1306                                 is_dir ? "directory" : "file", fname);
1307                         if (is_dir)
1308                                 goto skipping_dir_contents;
1309                         return;
1310                 }
1311         }
1312
1313 #ifdef SUPPORT_ACLS
1314         sx.acc_acl = sx.def_acl = NULL;
1315 #endif
1316 #ifdef SUPPORT_XATTRS
1317         sx.xattr = NULL;
1318 #endif
1319         if (dry_run > 1 || (dry_missing_dir && is_below(file, dry_missing_dir))) {
1320           parent_is_dry_missing:
1321                 if (fuzzy_dirlist) {
1322                         flist_free(fuzzy_dirlist);
1323                         fuzzy_dirlist = NULL;
1324                 }
1325                 parent_dirname = "";
1326                 statret = -1;
1327                 stat_errno = ENOENT;
1328         } else {
1329                 const char *dn = file->dirname ? file->dirname : ".";
1330                 dry_missing_dir = NULL;
1331                 if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
1332                         if (relative_paths && !implied_dirs
1333                          && do_stat(dn, &sx.st) < 0) {
1334                                 if (dry_run)
1335                                         goto parent_is_dry_missing;
1336                                 if (create_directory_path(fname) < 0) {
1337                                         rsyserr(FERROR_XFER, errno,
1338                                                 "recv_generator: mkdir %s failed",
1339                                                 full_fname(dn));
1340                                 }
1341                         }
1342                         if (fuzzy_dirlist) {
1343                                 flist_free(fuzzy_dirlist);
1344                                 fuzzy_dirlist = NULL;
1345                         }
1346                         if (fuzzy_basis)
1347                                 need_fuzzy_dirlist = 1;
1348 #ifdef SUPPORT_ACLS
1349                         if (!preserve_perms)
1350                                 dflt_perms = default_perms_for_dir(dn);
1351 #endif
1352                 }
1353                 parent_dirname = dn;
1354
1355                 if (need_fuzzy_dirlist && S_ISREG(file->mode)) {
1356                         strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf);
1357                         fuzzy_dirlist = get_dirlist(fnamecmpbuf, -1, 1);
1358                         need_fuzzy_dirlist = 0;
1359                 }
1360
1361                 statret = link_stat(fname, &sx.st, keep_dirlinks && is_dir);
1362                 stat_errno = errno;
1363         }
1364
1365         if (ignore_non_existing > 0 && statret == -1 && stat_errno == ENOENT) {
1366                 if (is_dir) {
1367                         if (is_dir < 0)
1368                                 return;
1369                         skip_dir = file;
1370                         file->flags |= FLAG_MISSING_DIR;
1371                 }
1372 #ifdef SUPPORT_HARD_LINKS
1373                 else if (F_IS_HLINKED(file))
1374                         handle_skipped_hlink(file, itemizing, code, f_out);
1375 #endif
1376                 if (verbose > 1) {
1377                         rprintf(FINFO, "not creating new %s \"%s\"\n",
1378                                 is_dir ? "directory" : "file", fname);
1379                 }
1380                 return;
1381         }
1382
1383         if (statret == 0 && !(sx.st.st_mode & S_IWUSR)
1384          && !am_root && sx.st.st_uid == our_uid)
1385                 del_opts |= DEL_NO_UID_WRITE;
1386
1387         if (ignore_existing > 0 && statret == 0
1388          && (!is_dir || !S_ISDIR(sx.st.st_mode))) {
1389                 if (verbose > 1 && is_dir >= 0)
1390                         rprintf(FINFO, "%s exists\n", fname);
1391 #ifdef SUPPORT_HARD_LINKS
1392                 if (F_IS_HLINKED(file))
1393                         handle_skipped_hlink(file, itemizing, code, f_out);
1394 #endif
1395                 goto cleanup;
1396         }
1397
1398         if (is_dir) {
1399                 if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
1400                         goto cleanup;
1401                 if (is_dir < 0) {
1402                         /* In inc_recurse mode we want to make sure any missing
1403                          * directories get created while we're still processing
1404                          * the parent dir (which allows us to touch the parent
1405                          * dir's mtime right away).  We will handle the dir in
1406                          * full later (right before we handle its contents). */
1407                         if (statret == 0
1408                          && (S_ISDIR(sx.st.st_mode)
1409                           || delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0))
1410                                 goto cleanup; /* Any errors get reported later. */
1411                         if (do_mkdir(fname, file->mode & 0700) == 0)
1412                                 file->flags |= FLAG_DIR_CREATED;
1413                         goto cleanup;
1414                 }
1415                 /* The file to be received is a directory, so we need
1416                  * to prepare appropriately.  If there is already a
1417                  * file of that name and it is *not* a directory, then
1418                  * we need to delete it.  If it doesn't exist, then
1419                  * (perhaps recursively) create it. */
1420                 if (statret == 0 && !S_ISDIR(sx.st.st_mode)) {
1421                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0)
1422                                 goto skipping_dir_contents;
1423                         statret = -1;
1424                 }
1425                 if (dry_run && statret != 0) {
1426                         if (!dry_missing_dir)
1427                                 dry_missing_dir = file;
1428                         file->flags |= FLAG_MISSING_DIR;
1429                 }
1430                 real_ret = statret;
1431                 real_sx = sx;
1432                 if (file->flags & FLAG_DIR_CREATED)
1433                         statret = -1;
1434                 if (!preserve_perms) { /* See comment in non-dir code below. */
1435                         file->mode = dest_mode(file->mode, sx.st.st_mode,
1436                                                dflt_perms, statret == 0);
1437                 }
1438                 if (statret != 0 && basis_dir[0] != NULL) {
1439                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1440                                               itemizing, code);
1441                         if (j == -2) {
1442                                 itemizing = 0;
1443                                 code = FNONE;
1444                         } else if (j >= 0)
1445                                 statret = 1;
1446                 }
1447                 if (itemizing && f_out != -1) {
1448                         itemize(fname, file, ndx, statret, &sx,
1449                                 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
1450                 }
1451                 if (real_ret != 0 && do_mkdir(fname,file->mode) < 0 && errno != EEXIST) {
1452                         if (!relative_paths || errno != ENOENT
1453                             || create_directory_path(fname) < 0
1454                             || (do_mkdir(fname, file->mode) < 0 && errno != EEXIST)) {
1455                                 rsyserr(FERROR_XFER, errno,
1456                                         "recv_generator: mkdir %s failed",
1457                                         full_fname(fname));
1458                           skipping_dir_contents:
1459                                 rprintf(FERROR,
1460                                     "*** Skipping any contents from this failed directory ***\n");
1461                                 skip_dir = file;
1462                                 file->flags |= FLAG_MISSING_DIR;
1463                                 goto cleanup;
1464                         }
1465                 }
1466                 if (set_file_attrs(fname, file, real_ret ? NULL : &real_sx, NULL, 0)
1467                     && verbose && code != FNONE && f_out != -1)
1468                         rprintf(code, "%s/\n", fname);
1469
1470                 /* We need to ensure that the dirs in the transfer have writable
1471                  * permissions during the time we are putting files within them.
1472                  * This is then fixed after the transfer is done. */
1473 #ifdef HAVE_CHMOD
1474                 if (!am_root && !(file->mode & S_IWUSR) && dir_tweaking) {
1475                         mode_t mode = file->mode | S_IWUSR;
1476                         if (do_chmod(fname, mode) < 0) {
1477                                 rsyserr(FERROR_XFER, errno,
1478                                         "failed to modify permissions on %s",
1479                                         full_fname(fname));
1480                         }
1481                         need_retouch_dir_perms = 1;
1482                 }
1483 #endif
1484
1485                 if (real_ret != 0 && one_file_system)
1486                         real_sx.st.st_dev = filesystem_dev;
1487                 if (inc_recurse) {
1488                         if (one_file_system) {
1489                                 uint32 *devp = F_DIR_DEV_P(file);
1490                                 DEV_MAJOR(devp) = major(real_sx.st.st_dev);
1491                                 DEV_MINOR(devp) = minor(real_sx.st.st_dev);
1492                         }
1493                 }
1494                 else if (delete_during && f_out != -1 && !phase
1495                     && !(file->flags & FLAG_MISSING_DIR)) {
1496                         if (file->flags & FLAG_CONTENT_DIR)
1497                                 delete_in_dir(fname, file, &real_sx.st.st_dev);
1498                         else
1499                                 change_local_filter_dir(fname, strlen(fname), F_DEPTH(file));
1500                 }
1501                 goto cleanup;
1502         }
1503
1504         /* If we're not preserving permissions, change the file-list's
1505          * mode based on the local permissions and some heuristics. */
1506         if (!preserve_perms) {
1507                 int exists = statret == 0 && !S_ISDIR(sx.st.st_mode);
1508                 file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms,
1509                                        exists);
1510         }
1511
1512 #ifdef SUPPORT_HARD_LINKS
1513         if (preserve_hard_links && F_HLINK_NOT_FIRST(file)
1514          && hard_link_check(file, ndx, fname, statret, &sx, itemizing, code))
1515                 goto cleanup;
1516 #endif
1517
1518         if (preserve_links && S_ISLNK(file->mode)) {
1519 #ifdef SUPPORT_LINKS
1520                 const char *sl = F_SYMLINK(file);
1521                 if (safe_symlinks && unsafe_symlink(sl, fname)) {
1522                         if (verbose) {
1523                                 if (solo_file)
1524                                         fname = f_name(file, NULL);
1525                                 rprintf(FINFO,
1526                                         "ignoring unsafe symlink %s -> \"%s\"\n",
1527                                         full_fname(fname), sl);
1528                         }
1529                         return;
1530                 }
1531                 if (statret == 0) {
1532                         char lnk[MAXPATHLEN];
1533                         int len;
1534
1535                         if (!S_ISLNK(sx.st.st_mode))
1536                                 statret = -1;
1537                         else if ((len = readlink(fname, lnk, MAXPATHLEN-1)) > 0
1538                               && strncmp(lnk, sl, len) == 0 && sl[len] == '\0') {
1539                                 /* The link is pointing to the right place. */
1540                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1541                                 if (itemizing)
1542                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1543 #if defined SUPPORT_HARD_LINKS && defined CAN_HARDLINK_SYMLINK
1544                                 if (preserve_hard_links && F_IS_HLINKED(file))
1545                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1546 #endif
1547                                 if (remove_source_files == 1)
1548                                         goto return_with_success;
1549                                 goto cleanup;
1550                         }
1551                         /* Not the right symlink (or not a symlink), so
1552                          * delete it. */
1553                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_SYMLINK) != 0)
1554                                 goto cleanup;
1555                 } else if (basis_dir[0] != NULL) {
1556                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1557                                               itemizing, code);
1558                         if (j == -2) {
1559 #ifndef CAN_HARDLINK_SYMLINK
1560                                 if (link_dest) {
1561                                         /* Resort to --copy-dest behavior. */
1562                                 } else
1563 #endif
1564                                 if (!copy_dest)
1565                                         goto cleanup;
1566                                 itemizing = 0;
1567                                 code = FNONE;
1568                         } else if (j >= 0)
1569                                 statret = 1;
1570                 }
1571 #ifdef SUPPORT_HARD_LINKS
1572                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1573                         cur_flist->in_progress++;
1574                         goto cleanup;
1575                 }
1576 #endif
1577                 if (do_symlink(sl, fname) != 0) {
1578                         rsyserr(FERROR_XFER, errno, "symlink %s -> \"%s\" failed",
1579                                 full_fname(fname), sl);
1580                 } else {
1581                         set_file_attrs(fname, file, NULL, NULL, 0);
1582                         if (itemizing) {
1583                                 itemize(fname, file, ndx, statret, &sx,
1584                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1585                         }
1586                         if (code != FNONE && verbose)
1587                                 rprintf(code, "%s -> %s\n", fname, sl);
1588 #ifdef SUPPORT_HARD_LINKS
1589                         if (preserve_hard_links && F_IS_HLINKED(file))
1590                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1591 #endif
1592                         /* This does not check remove_source_files == 1
1593                          * because this is one of the items that the old
1594                          * --remove-sent-files option would remove. */
1595                         if (remove_source_files)
1596                                 goto return_with_success;
1597                 }
1598 #endif
1599                 goto cleanup;
1600         }
1601
1602         if ((am_root && preserve_devices && IS_DEVICE(file->mode))
1603          || (preserve_specials && IS_SPECIAL(file->mode))) {
1604                 uint32 *devp = F_RDEV_P(file);
1605                 dev_t rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
1606                 if (statret == 0) {
1607                         int del_for_flag;
1608                         if (IS_DEVICE(file->mode)) {
1609                                 if (!IS_DEVICE(sx.st.st_mode))
1610                                         statret = -1;
1611                                 del_for_flag = DEL_FOR_DEVICE;
1612                         } else {
1613                                 if (!IS_SPECIAL(sx.st.st_mode))
1614                                         statret = -1;
1615                                 del_for_flag = DEL_FOR_SPECIAL;
1616                         }
1617                         if (statret == 0
1618                          && BITS_EQUAL(sx.st.st_mode, file->mode, _S_IFMT)
1619                          && sx.st.st_rdev == rdev) {
1620                                 /* The device or special file is identical. */
1621                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1622                                 if (itemizing)
1623                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1624 #ifdef SUPPORT_HARD_LINKS
1625                                 if (preserve_hard_links && F_IS_HLINKED(file))
1626                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1627 #endif
1628                                 if (remove_source_files == 1)
1629                                         goto return_with_success;
1630                                 goto cleanup;
1631                         }
1632                         if (delete_item(fname, sx.st.st_mode, del_opts | del_for_flag) != 0)
1633                                 goto cleanup;
1634                 } else if (basis_dir[0] != NULL) {
1635                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1636                                               itemizing, code);
1637                         if (j == -2) {
1638 #ifndef CAN_HARDLINK_SPECIAL
1639                                 if (link_dest) {
1640                                         /* Resort to --copy-dest behavior. */
1641                                 } else
1642 #endif
1643                                 if (!copy_dest)
1644                                         goto cleanup;
1645                                 itemizing = 0;
1646                                 code = FNONE;
1647                         } else if (j >= 0)
1648                                 statret = 1;
1649                 }
1650 #ifdef SUPPORT_HARD_LINKS
1651                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1652                         cur_flist->in_progress++;
1653                         goto cleanup;
1654                 }
1655 #endif
1656                 if (verbose > 2) {
1657                         rprintf(FINFO, "mknod(%s, 0%o, [%ld,%ld])\n",
1658                                 fname, (int)file->mode,
1659                                 (long)major(rdev), (long)minor(rdev));
1660                 }
1661                 if (do_mknod(fname, file->mode, rdev) < 0) {
1662                         rsyserr(FERROR_XFER, errno, "mknod %s failed",
1663                                 full_fname(fname));
1664                 } else {
1665                         set_file_attrs(fname, file, NULL, NULL, 0);
1666                         if (itemizing) {
1667                                 itemize(fname, file, ndx, statret, &sx,
1668                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1669                         }
1670                         if (code != FNONE && verbose)
1671                                 rprintf(code, "%s\n", fname);
1672 #ifdef SUPPORT_HARD_LINKS
1673                         if (preserve_hard_links && F_IS_HLINKED(file))
1674                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1675 #endif
1676                         if (remove_source_files == 1)
1677                                 goto return_with_success;
1678                 }
1679                 goto cleanup;
1680         }
1681
1682         if (!S_ISREG(file->mode)) {
1683                 if (solo_file)
1684                         fname = f_name(file, NULL);
1685                 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1686                 goto cleanup;
1687         }
1688
1689         if (max_size > 0 && F_LENGTH(file) > max_size) {
1690                 if (verbose > 1) {
1691                         if (solo_file)
1692                                 fname = f_name(file, NULL);
1693                         rprintf(FINFO, "%s is over max-size\n", fname);
1694                 }
1695                 goto cleanup;
1696         }
1697         if (min_size > 0 && F_LENGTH(file) < min_size) {
1698                 if (verbose > 1) {
1699                         if (solo_file)
1700                                 fname = f_name(file, NULL);
1701                         rprintf(FINFO, "%s is under min-size\n", fname);
1702                 }
1703                 goto cleanup;
1704         }
1705
1706         if (update_only > 0 && statret == 0
1707             && cmp_time(sx.st.st_mtime, file->modtime) > 0) {
1708                 if (verbose > 1)
1709                         rprintf(FINFO, "%s is newer\n", fname);
1710 #ifdef SUPPORT_HARD_LINKS
1711                 if (F_IS_HLINKED(file))
1712                         handle_skipped_hlink(file, itemizing, code, f_out);
1713 #endif
1714                 goto cleanup;
1715         }
1716
1717         fnamecmp = fname;
1718         fnamecmp_type = FNAMECMP_FNAME;
1719
1720         if (statret == 0 && !S_ISREG(sx.st.st_mode)) {
1721                 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_FILE) != 0)
1722                         goto cleanup;
1723                 statret = -1;
1724                 stat_errno = ENOENT;
1725         }
1726
1727         if (statret != 0 && basis_dir[0] != NULL) {
1728                 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &sx,
1729                                       itemizing, code);
1730                 if (j == -2) {
1731                         if (remove_source_files == 1)
1732                                 goto return_with_success;
1733                         goto cleanup;
1734                 }
1735                 if (j >= 0) {
1736                         fnamecmp = fnamecmpbuf;
1737                         fnamecmp_type = j;
1738                         statret = 0;
1739                 }
1740         }
1741
1742         real_ret = statret;
1743         real_sx = sx;
1744
1745         if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1746             && link_stat(partialptr, &partial_st, 0) == 0
1747             && S_ISREG(partial_st.st_mode)) {
1748                 if (statret != 0)
1749                         goto prepare_to_open;
1750         } else
1751                 partialptr = NULL;
1752
1753         if (statret != 0 && fuzzy_dirlist) {
1754                 int j = find_fuzzy(file, fuzzy_dirlist);
1755                 if (j >= 0) {
1756                         fuzzy_file = fuzzy_dirlist->files[j];
1757                         f_name(fuzzy_file, fnamecmpbuf);
1758                         if (verbose > 2) {
1759                                 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1760                                         fname, fnamecmpbuf);
1761                         }
1762                         sx.st.st_size = F_LENGTH(fuzzy_file);
1763                         statret = 0;
1764                         fnamecmp = fnamecmpbuf;
1765                         fnamecmp_type = FNAMECMP_FUZZY;
1766                 }
1767         }
1768
1769         if (statret != 0) {
1770 #ifdef SUPPORT_HARD_LINKS
1771                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1772                         cur_flist->in_progress++;
1773                         goto cleanup;
1774                 }
1775 #endif
1776                 if (stat_errno == ENOENT)
1777                         goto notify_others;
1778                 rsyserr(FERROR_XFER, stat_errno, "recv_generator: failed to stat %s",
1779                         full_fname(fname));
1780                 goto cleanup;
1781         }
1782
1783         if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1784                 ;
1785         else if (fnamecmp_type == FNAMECMP_FUZZY)
1786                 ;
1787         else if (unchanged_file(fnamecmp, file, &sx.st)) {
1788                 if (partialptr) {
1789                         do_unlink(partialptr);
1790                         handle_partial_dir(partialptr, PDIR_DELETE);
1791                 }
1792                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1793                 if (itemizing)
1794                         itemize(fnamecmp, file, ndx, statret, &sx, 0, 0, NULL);
1795 #ifdef SUPPORT_HARD_LINKS
1796                 if (preserve_hard_links && F_IS_HLINKED(file))
1797                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1798 #endif
1799                 if (remove_source_files != 1)
1800                         goto cleanup;
1801           return_with_success:
1802                 if (!dry_run)
1803                         send_msg_int(MSG_SUCCESS, ndx);
1804                 goto cleanup;
1805         }
1806
1807         if (append_mode > 0 && sx.st.st_size >= F_LENGTH(file)) {
1808 #ifdef SUPPORT_HARD_LINKS
1809                 if (F_IS_HLINKED(file))
1810                         handle_skipped_hlink(file, itemizing, code, f_out);
1811 #endif
1812                 goto cleanup;
1813         }
1814
1815   prepare_to_open:
1816         if (partialptr) {
1817                 sx.st = partial_st;
1818                 fnamecmp = partialptr;
1819                 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1820                 statret = 0;
1821         }
1822
1823         if (!do_xfers)
1824                 goto notify_others;
1825
1826         if (read_batch || whole_file) {
1827                 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1828                         if (!(backupptr = get_backup_name(fname)))
1829                                 goto cleanup;
1830                         if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
1831                                 goto pretend_missing;
1832                         if (copy_file(fname, backupptr, -1, back_file->mode, 1) < 0) {
1833                                 unmake_file(back_file);
1834                                 back_file = NULL;
1835                                 goto cleanup;
1836                         }
1837                 }
1838                 goto notify_others;
1839         }
1840
1841         if (fuzzy_dirlist) {
1842                 int j = flist_find(fuzzy_dirlist, file);
1843                 if (j >= 0) /* don't use changing file as future fuzzy basis */
1844                         fuzzy_dirlist->files[j]->flags |= FLAG_FILE_SENT;
1845         }
1846
1847         /* open the file */
1848         if ((fd = do_open(fnamecmp, O_RDONLY, 0)) < 0) {
1849                 rsyserr(FERROR, errno, "failed to open %s, continuing",
1850                         full_fname(fnamecmp));
1851           pretend_missing:
1852                 /* pretend the file didn't exist */
1853 #ifdef SUPPORT_HARD_LINKS
1854                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1855                         cur_flist->in_progress++;
1856                         goto cleanup;
1857                 }
1858 #endif
1859                 statret = real_ret = -1;
1860                 goto notify_others;
1861         }
1862
1863         if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1864                 if (!(backupptr = get_backup_name(fname))) {
1865                         close(fd);
1866                         goto cleanup;
1867                 }
1868                 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1869                         close(fd);
1870                         goto pretend_missing;
1871                 }
1872                 if (robust_unlink(backupptr) && errno != ENOENT) {
1873                         rsyserr(FERROR_XFER, errno, "unlink %s",
1874                                 full_fname(backupptr));
1875                         unmake_file(back_file);
1876                         back_file = NULL;
1877                         close(fd);
1878                         goto cleanup;
1879                 }
1880                 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1881                         int save_errno = errno ? errno : EINVAL; /* 0 paranoia */
1882                         if (errno == ENOENT && make_bak_dir(backupptr) == 0) {
1883                                 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0)
1884                                         save_errno = errno ? errno : save_errno;
1885                                 else
1886                                         save_errno = 0;
1887                         }
1888                         if (save_errno) {
1889                                 rsyserr(FERROR_XFER, save_errno, "open %s", full_fname(backupptr));
1890                                 unmake_file(back_file);
1891                                 back_file = NULL;
1892                                 close(fd);
1893                                 goto cleanup;
1894                         }
1895                 }
1896                 fnamecmp_type = FNAMECMP_BACKUP;
1897         }
1898
1899         if (verbose > 3) {
1900                 rprintf(FINFO, "gen mapped %s of size %.0f\n",
1901                         fnamecmp, (double)sx.st.st_size);
1902         }
1903
1904         if (verbose > 2)
1905                 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1906
1907   notify_others:
1908         if (remove_source_files && !delay_updates && !phase && !dry_run)
1909                 increment_active_files(ndx, itemizing, code);
1910         if (inc_recurse && !dry_run)
1911                 cur_flist->in_progress++;
1912 #ifdef SUPPORT_HARD_LINKS
1913         if (preserve_hard_links && F_IS_HLINKED(file))
1914                 file->flags |= FLAG_FILE_SENT;
1915 #endif
1916         write_ndx(f_out, ndx);
1917         if (itemizing) {
1918                 int iflags = ITEM_TRANSFER;
1919                 if (always_checksum > 0)
1920                         iflags |= ITEM_REPORT_CHANGE;
1921                 if (fnamecmp_type != FNAMECMP_FNAME)
1922                         iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1923                 if (fnamecmp_type == FNAMECMP_FUZZY)
1924                         iflags |= ITEM_XNAME_FOLLOWS;
1925                 itemize(fnamecmp, file, -1, real_ret, &real_sx, iflags, fnamecmp_type,
1926                         fuzzy_file ? fuzzy_file->basename : NULL);
1927 #ifdef SUPPORT_ACLS
1928                 if (preserve_acls)
1929                         free_acl(&real_sx);
1930 #endif
1931 #ifdef SUPPORT_XATTRS
1932                 if (preserve_xattrs)
1933                         free_xattr(&real_sx);
1934 #endif
1935         }
1936
1937         if (!do_xfers) {
1938 #ifdef SUPPORT_HARD_LINKS
1939                 if (preserve_hard_links && F_IS_HLINKED(file))
1940                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1941 #endif
1942                 goto cleanup;
1943         }
1944         if (read_batch)
1945                 goto cleanup;
1946
1947         if (statret != 0 || whole_file || sx.st.st_size <= 0)
1948                 write_sum_head(f_out, NULL);
1949         else {
1950                 if (generate_and_send_sums(fd, sx.st.st_size, f_out, f_copy) < 0) {
1951                         rprintf(FWARNING,
1952                             "WARNING: file is too large for checksum sending: %s\n",
1953                             fnamecmp);
1954                         write_sum_head(f_out, NULL);
1955                 }
1956                 close(fd);
1957         }
1958
1959   cleanup:
1960         if (back_file) {
1961                 int save_preserve_xattrs = preserve_xattrs;
1962                 if (f_copy >= 0)
1963                         close(f_copy);
1964 #ifdef SUPPORT_XATTRS
1965                 if (preserve_xattrs) {
1966                         copy_xattrs(fname, backupptr);
1967                         preserve_xattrs = 0;
1968                 }
1969 #endif
1970                 set_file_attrs(backupptr, back_file, NULL, NULL, 0);
1971                 preserve_xattrs = save_preserve_xattrs;
1972                 if (verbose > 1) {
1973                         rprintf(FINFO, "backed up %s to %s\n",
1974                                 fname, backupptr);
1975                 }
1976                 unmake_file(back_file);
1977         }
1978
1979 #ifdef SUPPORT_ACLS
1980         if (preserve_acls)
1981                 free_acl(&sx);
1982 #endif
1983 #ifdef SUPPORT_XATTRS
1984         if (preserve_xattrs)
1985                 free_xattr(&sx);
1986 #endif
1987         return;
1988 }
1989
1990 #ifdef SUPPORT_HARD_LINKS
1991 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
1992                                  enum logcode code, int f_out)
1993 {
1994         char fbuf[MAXPATHLEN];
1995         int new_last_ndx;
1996         struct file_list *save_flist = cur_flist;
1997
1998         /* If we skip the last item in a chain of links and there was a
1999          * prior non-skipped hard-link waiting to finish, finish it now. */
2000         if ((new_last_ndx = skip_hard_link(file, &cur_flist)) < 0)
2001                 return;
2002
2003         file = cur_flist->files[new_last_ndx - cur_flist->ndx_start];
2004         cur_flist->in_progress--; /* undo prior increment */
2005         f_name(file, fbuf);
2006         recv_generator(fbuf, file, new_last_ndx, itemizing, code, f_out);
2007
2008         cur_flist = save_flist;
2009 }
2010 #endif
2011
2012 static void touch_up_dirs(struct file_list *flist, int ndx)
2013 {
2014         static int counter = 0;
2015         struct file_struct *file;
2016         char *fname;
2017         int i, start, end;
2018
2019         if (ndx < 0) {
2020                 start = 0;
2021                 end = flist->used - 1;
2022         } else
2023                 start = end = ndx;
2024
2025         /* Fix any directory permissions that were modified during the
2026          * transfer and/or re-set any tweaked modified-time values. */
2027         for (i = start; i <= end; i++, counter++) {
2028                 file = flist->files[i];
2029                 if (!S_ISDIR(file->mode)
2030                  || (!implied_dirs && file->flags & FLAG_IMPLIED_DIR))
2031                         continue;
2032                 if (verbose > 3) {
2033                         fname = f_name(file, NULL);
2034                         rprintf(FINFO, "touch_up_dirs: %s (%d)\n",
2035                                 NS(fname), i);
2036                 }
2037                 if (!F_IS_ACTIVE(file) || file->flags & FLAG_MISSING_DIR
2038                  || (!need_retouch_dir_times && file->mode & S_IWUSR))
2039                         continue;
2040                 fname = f_name(file, NULL);
2041                 if (!(file->mode & S_IWUSR))
2042                         do_chmod(fname, file->mode);
2043                 if (need_retouch_dir_times) {
2044                         STRUCT_STAT st;
2045                         if (link_stat(fname, &st, 0) == 0
2046                          && cmp_time(st.st_mtime, file->modtime) != 0)
2047                                 set_modtime(fname, file->modtime, file->mode);
2048                 }
2049                 if (allowed_lull && !(counter % lull_mod))
2050                         maybe_send_keepalive();
2051                 else if (!(counter & 0xFF))
2052                         maybe_flush_socket(0);
2053         }
2054 }
2055
2056 void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
2057 {
2058         struct file_struct *file;
2059         struct file_list *flist;
2060         char fbuf[MAXPATHLEN];
2061         int ndx;
2062
2063         while (1) {
2064 #ifdef SUPPORT_HARD_LINKS
2065                 if (preserve_hard_links && (ndx = get_hlink_num()) != -1) {
2066                         flist = flist_for_ndx(ndx);
2067                         assert(flist != NULL);
2068                         file = flist->files[ndx - flist->ndx_start];
2069                         assert(file->flags & FLAG_HLINKED);
2070                         finish_hard_link(file, f_name(file, fbuf), ndx, NULL, itemizing, code, -1);
2071                         flist->in_progress--;
2072                         continue;
2073                 }
2074 #endif
2075
2076                 if (check_redo && (ndx = get_redo_num()) != -1) {
2077                         csum_length = SUM_LENGTH;
2078                         max_size = -max_size;
2079                         min_size = -min_size;
2080                         ignore_existing = -ignore_existing;
2081                         ignore_non_existing = -ignore_non_existing;
2082                         update_only = -update_only;
2083                         always_checksum = -always_checksum;
2084                         size_only = -size_only;
2085                         append_mode = -append_mode;
2086                         make_backups = -make_backups; /* avoid dup backup w/inplace */
2087                         ignore_times++;
2088
2089                         flist = cur_flist;
2090                         cur_flist = flist_for_ndx(ndx);
2091
2092                         file = cur_flist->files[ndx - cur_flist->ndx_start];
2093                         if (solo_file)
2094                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2095                         else
2096                                 f_name(file, fbuf);
2097                         recv_generator(fbuf, file, ndx, itemizing, code, sock_f_out);
2098                         cur_flist->to_redo--;
2099
2100                         cur_flist = flist;
2101
2102                         csum_length = SHORT_SUM_LENGTH;
2103                         max_size = -max_size;
2104                         min_size = -min_size;
2105                         ignore_existing = -ignore_existing;
2106                         ignore_non_existing = -ignore_non_existing;
2107                         update_only = -update_only;
2108                         always_checksum = -always_checksum;
2109                         size_only = -size_only;
2110                         append_mode = -append_mode;
2111                         make_backups = -make_backups;
2112                         ignore_times--;
2113                         continue;
2114                 }
2115
2116                 if (cur_flist == first_flist)
2117                         break;
2118
2119                 /* We only get here if inc_recurse is enabled. */
2120                 if (first_flist->in_progress || first_flist->to_redo)
2121                         break;
2122
2123                 if (!read_batch) {
2124                         write_ndx(sock_f_out, NDX_DONE);
2125                         maybe_flush_socket(1);
2126                 }
2127
2128                 if (delete_during == 2 || !dir_tweaking) {
2129                         /* Skip directory touch-up. */
2130                 } else if (first_flist->parent_ndx >= 0)
2131                         touch_up_dirs(dir_flist, first_flist->parent_ndx);
2132
2133                 flist_free(first_flist); /* updates first_flist */
2134         }
2135 }
2136
2137 void generate_files(int f_out, const char *local_name)
2138 {
2139         int i, ndx;
2140         char fbuf[MAXPATHLEN];
2141         int itemizing;
2142         enum logcode code;
2143         int save_do_progress = do_progress;
2144
2145         if (protocol_version >= 29) {
2146                 itemizing = 1;
2147                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2148                 code = logfile_format_has_i ? FNONE : FLOG;
2149         } else if (am_daemon) {
2150                 itemizing = logfile_format_has_i && do_xfers;
2151                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2152                 code = itemizing || !do_xfers ? FCLIENT : FINFO;
2153         } else if (!am_server) {
2154                 itemizing = stdout_format_has_i;
2155                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2156                 code = itemizing ? FNONE : FINFO;
2157         } else {
2158                 itemizing = 0;
2159                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2160                 code = FINFO;
2161         }
2162         solo_file = local_name;
2163         dir_tweaking = !(list_only || solo_file || dry_run);
2164         need_retouch_dir_times = preserve_times > 1;
2165         lull_mod = allowed_lull * 5;
2166         symlink_timeset_failed_flags = ITEM_REPORT_TIME
2167             | (protocol_version >= 30 || !am_server ? ITEM_REPORT_TIMEFAIL : 0);
2168         implied_dirs_are_missing = relative_paths && !implied_dirs && protocol_version < 30;
2169
2170         if (verbose > 2)
2171                 rprintf(FINFO, "generator starting pid=%ld\n", (long)getpid());
2172
2173         if (delete_before && !solo_file && cur_flist->used > 0)
2174                 do_delete_pass();
2175         if (delete_during == 2) {
2176                 deldelay_size = BIGPATHBUFLEN * 4;
2177                 deldelay_buf = new_array(char, deldelay_size);
2178                 if (!deldelay_buf)
2179                         out_of_memory("delete-delay");
2180         }
2181         do_progress = 0;
2182
2183         if (append_mode > 0 || whole_file < 0)
2184                 whole_file = 0;
2185         if (verbose >= 2) {
2186                 rprintf(FINFO, "delta-transmission %s\n",
2187                         whole_file
2188                         ? "disabled for local transfer or --whole-file"
2189                         : "enabled");
2190         }
2191
2192         /* Since we often fill up the outgoing socket and then just sit around
2193          * waiting for the other 2 processes to do their thing, we don't want
2194          * to exit on a timeout.  If the data stops flowing, the receiver will
2195          * notice that and let us know via the redo pipe (or its closing). */
2196         ignore_timeout = 1;
2197
2198         dflt_perms = (ACCESSPERMS & ~orig_umask);
2199
2200         do {
2201 #ifdef SUPPORT_HARD_LINKS
2202                 if (preserve_hard_links && inc_recurse) {
2203                         while (!flist_eof && file_total < FILECNT_LOOKAHEAD/2)
2204                                 wait_for_receiver();
2205                 }
2206 #endif
2207
2208                 if (inc_recurse && cur_flist->parent_ndx >= 0) {
2209                         struct file_struct *fp = dir_flist->files[cur_flist->parent_ndx];
2210                         f_name(fp, fbuf);
2211                         ndx = cur_flist->ndx_start - 1;
2212                         recv_generator(fbuf, fp, ndx, itemizing, code, f_out);
2213                         if (delete_during && dry_run < 2 && !list_only
2214                          && !(fp->flags & FLAG_MISSING_DIR)) {
2215                                 if (fp->flags & FLAG_CONTENT_DIR) {
2216                                         dev_t dirdev;
2217                                         if (one_file_system) {
2218                                                 uint32 *devp = F_DIR_DEV_P(fp);
2219                                                 dirdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
2220                                         } else
2221                                                 dirdev = MAKEDEV(0, 0);
2222                                         delete_in_dir(fbuf, fp, &dirdev);
2223                                 } else
2224                                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(fp));
2225                         }
2226                 }
2227                 for (i = cur_flist->low; i <= cur_flist->high; i++) {
2228                         struct file_struct *file = cur_flist->sorted[i];
2229
2230                         if (!F_IS_ACTIVE(file))
2231                                 continue;
2232
2233                         if (unsort_ndx)
2234                                 ndx = F_NDX(file);
2235                         else
2236                                 ndx = i + cur_flist->ndx_start;
2237
2238                         if (solo_file)
2239                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2240                         else
2241                                 f_name(file, fbuf);
2242                         recv_generator(fbuf, file, ndx, itemizing, code, f_out);
2243
2244                         check_for_finished_files(itemizing, code, 0);
2245
2246                         if (allowed_lull && !(i % lull_mod))
2247                                 maybe_send_keepalive();
2248                         else if (!(i & 0xFF))
2249                                 maybe_flush_socket(0);
2250                 }
2251
2252                 if (!inc_recurse) {
2253                         write_ndx(f_out, NDX_DONE);
2254                         break;
2255                 }
2256
2257                 while (1) {
2258                         check_for_finished_files(itemizing, code, 1);
2259                         if (cur_flist->next || flist_eof)
2260                                 break;
2261                         wait_for_receiver();
2262                 }
2263         } while ((cur_flist = cur_flist->next) != NULL);
2264
2265         if (delete_during)
2266                 delete_in_dir(NULL, NULL, &dev_zero);
2267         phase++;
2268         if (verbose > 2)
2269                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2270
2271         while (1) {
2272                 check_for_finished_files(itemizing, code, 1);
2273                 if (msgdone_cnt)
2274                         break;
2275                 wait_for_receiver();
2276         }
2277
2278         phase++;
2279         if (verbose > 2)
2280                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2281
2282         write_ndx(f_out, NDX_DONE);
2283         /* Reduce round-trip lag-time for a useless delay-updates phase. */
2284         if (protocol_version >= 29 && !delay_updates)
2285                 write_ndx(f_out, NDX_DONE);
2286
2287         /* Read MSG_DONE for the redo phase (and any prior messages). */
2288         while (1) {
2289                 check_for_finished_files(itemizing, code, 0);
2290                 if (msgdone_cnt > 1)
2291                         break;
2292                 wait_for_receiver();
2293         }
2294
2295         if (protocol_version >= 29) {
2296                 phase++;
2297                 if (verbose > 2)
2298                         rprintf(FINFO, "generate_files phase=%d\n", phase);
2299                 if (delay_updates)
2300                         write_ndx(f_out, NDX_DONE);
2301                 /* Read MSG_DONE for delay-updates phase & prior messages. */
2302                 while (msgdone_cnt == 2)
2303                         wait_for_receiver();
2304         }
2305
2306         do_progress = save_do_progress;
2307         if (delete_during == 2)
2308                 do_delayed_deletions(fbuf);
2309         if (delete_after && !solo_file && file_total > 0)
2310                 do_delete_pass();
2311
2312         if ((need_retouch_dir_perms || need_retouch_dir_times)
2313          && dir_tweaking && (!inc_recurse || delete_during == 2))
2314                 touch_up_dirs(dir_flist, -1);
2315
2316         if (max_delete >= 0 && deletion_count > max_delete) {
2317                 rprintf(FINFO,
2318                         "Deletions stopped due to --max-delete limit (%d skipped)\n",
2319                         deletion_count - max_delete);
2320                 io_error |= IOERR_DEL_LIMIT;
2321         }
2322
2323         if (verbose > 2)
2324                 rprintf(FINFO, "generate_files finished\n");
2325 }