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 (preserve_xattrs && !dry_run
 701                          && iflags & (ITEM_REPORT_XATTR|ITEM_TRANSFER)) {
 702                                 send_xattr_request(NULL, file,
 703                                         iflags & ITEM_REPORT_XATTR ? sock_f_out : -1);
 704                         }
 705 #endif
 706                 } else if (ndx >= 0) {
 707                         enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
 708                         log_item(code, file, &stats, iflags, xname);
 709                 }
 710         }
 711 }
 712
 713
 714 /* Perform our quick-check heuristic for determining if a file is unchanged. */
 715 int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
 716 {
 717         if (st->st_size != F_LENGTH(file))
 718                 return 0;
 719
 720         /* if always checksum is set then we use the checksum instead
 721            of the file time to determine whether to sync */
 722         if (always_checksum > 0 && S_ISREG(st->st_mode)) {
 723                 char sum[MAX_DIGEST_LEN];
 724                 file_checksum(fn, sum, st->st_size);
 725                 return memcmp(sum, F_SUM(file), checksum_len) == 0;
 726         }
 727
 728         if (size_only > 0)
 729                 return 1;
 730
 731         if (ignore_times)
 732                 return 0;
 733
 734         return cmp_time(st->st_mtime, file->modtime) == 0;
 735 }
 736
 737
 738 /*
 739  * set (initialize) the size entries in the per-file sum_struct
 740  * calculating dynamic block and checksum sizes.
 741  *
 742  * This is only called from generate_and_send_sums() but is a separate
 743  * function to encapsulate the logic.
 744  *
 745  * The block size is a rounded square root of file length.
 746  *
 747  * The checksum size is determined according to:
 748  *     blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
 749  * provided by Donovan Baarda which gives a probability of rsync
 750  * algorithm corrupting data and falling back using the whole md4
 751  * checksums.
 752  *
 753  * This might be made one of several selectable heuristics.
 754  */
 755 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
 756 {
 757         int32 blength;
 758         int s2length;
 759         int64 l;
 760
 761         if (block_size)
 762                 blength = block_size;
 763         else if (len <= BLOCK_SIZE * BLOCK_SIZE)
 764                 blength = BLOCK_SIZE;
 765         else {
 766                 int32 c;
 767                 int cnt;
 768                 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
 769                 if (cnt >= 31 || c >= MAX_BLOCK_SIZE)
 770                         blength = MAX_BLOCK_SIZE;
 771                 else {
 772                     blength = 0;
 773                     do {
 774                             blength |= c;
 775                             if (len < (int64)blength * blength)
 776                                     blength &= ~c;
 777                             c >>= 1;
 778                     } while (c >= 8);   /* round to multiple of 8 */
 779                     blength = MAX(blength, BLOCK_SIZE);
 780                 }
 781         }
 782
 783         if (protocol_version < 27) {
 784                 s2length = csum_length;
 785         } else if (csum_length == SUM_LENGTH) {
 786                 s2length = SUM_LENGTH;
 787         } else {
 788                 int32 c;
 789                 int b = BLOCKSUM_BIAS;
 790                 for (l = len; l >>= 1; b += 2) {}
 791                 for (c = blength; (c >>= 1) && b; b--) {}
 792                 /* add a bit, subtract rollsum, round up. */
 793                 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
 794                 s2length = MAX(s2length, csum_length);
 795                 s2length = MIN(s2length, SUM_LENGTH);
 796         }
 797
 798         sum->flength    = len;
 799         sum->blength    = blength;
 800         sum->s2length   = s2length;
 801         sum->remainder  = (int32)(len % blength);
 802         sum->count      = (int32)(l = (len / blength) + (sum->remainder != 0));
 803
 804         if ((int64)sum->count != l)
 805                 sum->count = -1;
 806
 807         if (sum->count && verbose > 2) {
 808                 rprintf(FINFO,
 809                         "count=%.0f rem=%ld blength=%ld s2length=%d flength=%.0f\n",
 810                         (double)sum->count, (long)sum->remainder, (long)sum->blength,
 811                         sum->s2length, (double)sum->flength);
 812         }
 813 }
 814
 815
 816 /*
 817  * Generate and send a stream of signatures/checksums that describe a buffer
 818  *
 819  * Generate approximately one checksum every block_len bytes.
 820  */
 821 static int generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
 822 {
 823         int32 i;
 824         struct map_struct *mapbuf;
 825         struct sum_struct sum;
 826         OFF_T offset = 0;
 827
 828         sum_sizes_sqroot(&sum, len);
 829         if (sum.count < 0)
 830                 return -1;
 831         write_sum_head(f_out, &sum);
 832
 833         if (append_mode > 0 && f_copy < 0)
 834                 return 0;
 835
 836         if (len > 0)
 837                 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
 838         else
 839                 mapbuf = NULL;
 840
 841         for (i = 0; i < sum.count; i++) {
 842                 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
 843                 char *map = map_ptr(mapbuf, offset, n1);
 844                 char sum2[SUM_LENGTH];
 845                 uint32 sum1;
 846
 847                 len -= n1;
 848                 offset += n1;
 849
 850                 if (f_copy >= 0) {
 851                         full_write(f_copy, map, n1);
 852                         if (append_mode > 0)
 853                                 continue;
 854                 }
 855
 856                 sum1 = get_checksum1(map, n1);
 857                 get_checksum2(map, n1, sum2);
 858
 859                 if (verbose > 3) {
 860                         rprintf(FINFO,
 861                                 "chunk[%.0f] offset=%.0f len=%ld sum1=%08lx\n",
 862                                 (double)i, (double)offset - n1, (long)n1,
 863                                 (unsigned long)sum1);
 864                 }
 865                 write_int(f_out, sum1);
 866                 write_buf(f_out, sum2, sum.s2length);
 867         }
 868
 869         if (mapbuf)
 870                 unmap_file(mapbuf);
 871
 872         return 0;
 873 }
 874
 875
 876 /* Try to find a filename in the same dir as "fname" with a similar name. */
 877 static int find_fuzzy(struct file_struct *file, struct file_list *dirlist)
 878 {
 879         int fname_len, fname_suf_len;
 880         const char *fname_suf, *fname = file->basename;
 881         uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
 882         int j, lowest_j = -1;
 883
 884         fname_len = strlen(fname);
 885         fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
 886
 887         for (j = 0; j < dirlist->used; j++) {
 888                 struct file_struct *fp = dirlist->files[j];
 889                 const char *suf, *name;
 890                 int len, suf_len;
 891                 uint32 dist;
 892
 893                 if (!S_ISREG(fp->mode) || !F_LENGTH(fp)
 894                  || fp->flags & FLAG_FILE_SENT)
 895                         continue;
 896
 897                 name = fp->basename;
 898
 899                 if (F_LENGTH(fp) == F_LENGTH(file)
 900                     && cmp_time(fp->modtime, file->modtime) == 0) {
 901                         if (verbose > 4) {
 902                                 rprintf(FINFO,
 903                                         "fuzzy size/modtime match for %s\n",
 904                                         name);
 905                         }
 906                         return j;
 907                 }
 908
 909                 len = strlen(name);
 910                 suf = find_filename_suffix(name, len, &suf_len);
 911
 912                 dist = fuzzy_distance(name, len, fname, fname_len);
 913                 /* Add some extra weight to how well the suffixes match. */
 914                 dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len)
 915                       * 10;
 916                 if (verbose > 4) {
 917                         rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
 918                                 name, (int)(dist>>16), (int)(dist&0xFFFF));
 919                 }
 920                 if (dist <= lowest_dist) {
 921                         lowest_dist = dist;
 922                         lowest_j = j;
 923                 }
 924         }
 925
 926         return lowest_j;
 927 }
 928
 929 /* Copy a file found in our --copy-dest handling. */
 930 static int copy_altdest_file(const char *src, const char *dest, struct file_struct *file)
 931 {
 932         char buf[MAXPATHLEN];
 933         const char *copy_to, *partialptr;
 934         int save_preserve_xattrs = preserve_xattrs;
 935         int ok, fd_w;
 936
 937         if (inplace) {
 938                 /* Let copy_file open the destination in place. */
 939                 fd_w = -1;
 940                 copy_to = dest;
 941         } else {
 942                 fd_w = open_tmpfile(buf, dest, file);
 943                 if (fd_w < 0)
 944                         return -1;
 945                 copy_to = buf;
 946         }
 947         cleanup_set(copy_to, NULL, NULL, -1, -1);
 948         if (copy_file(src, copy_to, fd_w, file->mode, 0) < 0) {
 949                 if (verbose) {
 950                         rsyserr(FINFO, errno, "copy_file %s => %s",
 951                                 full_fname(src), copy_to);
 952                 }
 953                 /* Try to clean up. */
 954                 unlink(copy_to);
 955                 cleanup_disable();
 956                 return -1;
 957         }
 958         partialptr = partial_dir ? partial_dir_fname(dest) : NULL;
 959         preserve_xattrs = 0; /* xattrs were copied with file */
 960         ok = finish_transfer(dest, copy_to, src, partialptr, file, 1, 0);
 961         preserve_xattrs = save_preserve_xattrs;
 962         cleanup_disable();
 963         return ok ? 0 : -1;
 964 }
 965
 966 /* This is only called for regular files.  We return -2 if we've finished
 967  * handling the file, -1 if no dest-linking occurred, or a non-negative
 968  * value if we found an alternate basis file. */
 969 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
 970                          char *cmpbuf, stat_x *sxp, int itemizing,
 971                          enum logcode code)
 972 {
 973         int best_match = -1;
 974         int match_level = 0;
 975         int j = 0;
 976
 977         do {
 978                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 979                 if (link_stat(cmpbuf, &sxp->st, 0) < 0 || !S_ISREG(sxp->st.st_mode))
 980                         continue;
 981                 switch (match_level) {
 982                 case 0:
 983                         best_match = j;
 984                         match_level = 1;
 985                         /* FALL THROUGH */
 986                 case 1:
 987                         if (!unchanged_file(cmpbuf, file, &sxp->st))
 988                                 continue;
 989                         best_match = j;
 990                         match_level = 2;
 991                         /* FALL THROUGH */
 992                 case 2:
 993                         if (!unchanged_attrs(cmpbuf, file, sxp))
 994                                 continue;
 995                         best_match = j;
 996                         match_level = 3;
 997                         break;
 998                 }
 999                 break;
1000         } while (basis_dir[++j] != NULL);
1001
1002         if (!match_level)
1003                 return -1;
1004
1005         if (j != best_match) {
1006                 j = best_match;
1007                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1008                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1009                         return -1;
1010         }
1011
1012         if (match_level == 3 && !copy_dest) {
1013 #ifdef SUPPORT_HARD_LINKS
1014                 if (link_dest) {
1015                         if (!hard_link_one(file, fname, cmpbuf, 1))
1016                                 goto try_a_copy;
1017                         if (preserve_hard_links && F_IS_HLINKED(file))
1018                                 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, j);
1019                         if (!maybe_ATTRS_REPORT && (verbose > 1 || stdout_format_has_i > 1)) {
1020                                 itemize(cmpbuf, file, ndx, 1, sxp,
1021                                         ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS,
1022                                         0, "");
1023                         }
1024                 } else
1025 #endif
1026                 if (itemizing)
1027                         itemize(cmpbuf, file, ndx, 0, sxp, 0, 0, NULL);
1028                 if (verbose > 1 && maybe_ATTRS_REPORT)
1029                         rprintf(FCLIENT, "%s is uptodate\n", fname);
1030                 return -2;
1031         }
1032
1033         if (match_level >= 2) {
1034 #ifdef SUPPORT_HARD_LINKS
1035           try_a_copy: /* Copy the file locally. */
1036 #endif
1037                 if (!dry_run && copy_altdest_file(cmpbuf, fname, file) < 0)
1038                         return -1;
1039                 if (itemizing)
1040                         itemize(cmpbuf, file, ndx, 0, sxp, ITEM_LOCAL_CHANGE, 0, NULL);
1041                 if (maybe_ATTRS_REPORT
1042                  && ((!itemizing && verbose && match_level == 2)
1043                   || (verbose > 1 && match_level == 3))) {
1044                         code = match_level == 3 ? FCLIENT : FINFO;
1045                         rprintf(code, "%s%s\n", fname,
1046                                 match_level == 3 ? " is uptodate" : "");
1047                 }
1048 #ifdef SUPPORT_HARD_LINKS
1049                 if (preserve_hard_links && F_IS_HLINKED(file))
1050                         finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, -1);
1051 #endif
1052                 return -2;
1053         }
1054
1055         return FNAMECMP_BASIS_DIR_LOW + j;
1056 }
1057
1058 /* This is only called for non-regular files.  We return -2 if we've finished
1059  * handling the file, or -1 if no dest-linking occurred, or a non-negative
1060  * value if we found an alternate basis file. */
1061 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
1062                          char *cmpbuf, stat_x *sxp, int itemizing,
1063                          enum logcode code)
1064 {
1065         char lnk[MAXPATHLEN];
1066         int best_match = -1;
1067         int match_level = 0;
1068         enum nonregtype type;
1069         uint32 *devp;
1070         int len, j = 0;
1071
1072 #ifndef SUPPORT_LINKS
1073         if (S_ISLNK(file->mode))
1074                 return -1;
1075 #endif
1076         if (S_ISDIR(file->mode)) {
1077                 type = TYPE_DIR;
1078         } else if (IS_SPECIAL(file->mode))
1079                 type = TYPE_SPECIAL;
1080         else if (IS_DEVICE(file->mode))
1081                 type = TYPE_DEVICE;
1082 #ifdef SUPPORT_LINKS
1083         else if (S_ISLNK(file->mode))
1084                 type = TYPE_SYMLINK;
1085 #endif
1086         else {
1087                 rprintf(FERROR,
1088                         "internal: try_dests_non() called with invalid mode (%o)\n",
1089                         (int)file->mode);
1090                 exit_cleanup(RERR_UNSUPPORTED);
1091         }
1092
1093         do {
1094                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1095                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1096                         continue;
1097                 switch (type) {
1098                 case TYPE_DIR:
1099                         if (!S_ISDIR(sxp->st.st_mode))
1100                                 continue;
1101                         break;
1102                 case TYPE_SPECIAL:
1103                         if (!IS_SPECIAL(sxp->st.st_mode))
1104                                 continue;
1105                         break;
1106                 case TYPE_DEVICE:
1107                         if (!IS_DEVICE(sxp->st.st_mode))
1108                                 continue;
1109                         break;
1110 #ifdef SUPPORT_LINKS
1111                 case TYPE_SYMLINK:
1112                         if (!S_ISLNK(sxp->st.st_mode))
1113                                 continue;
1114                         break;
1115 #endif
1116                 }
1117                 if (match_level < 1) {
1118                         match_level = 1;
1119                         best_match = j;
1120                 }
1121                 switch (type) {
1122                 case TYPE_DIR:
1123                         break;
1124                 case TYPE_SPECIAL:
1125                 case TYPE_DEVICE:
1126                         devp = F_RDEV_P(file);
1127                         if (sxp->st.st_rdev != MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)))
1128                                 continue;
1129                         break;
1130 #ifdef SUPPORT_LINKS
1131                 case TYPE_SYMLINK:
1132                         if ((len = readlink(cmpbuf, lnk, MAXPATHLEN-1)) <= 0)
1133                                 continue;
1134                         lnk[len] = '\0';
1135                         if (strcmp(lnk, F_SYMLINK(file)) != 0)
1136                                 continue;
1137                         break;
1138 #endif
1139                 }
1140                 if (match_level < 2) {
1141                         match_level = 2;
1142                         best_match = j;
1143                 }
1144                 if (unchanged_attrs(cmpbuf, file, sxp)) {
1145                         match_level = 3;
1146                         best_match = j;
1147                         break;
1148                 }
1149         } while (basis_dir[++j] != NULL);
1150
1151         if (!match_level)
1152                 return -1;
1153
1154         if (j != best_match) {
1155                 j = best_match;
1156                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1157                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1158                         return -1;
1159         }
1160
1161         if (match_level == 3) {
1162 #ifdef SUPPORT_HARD_LINKS
1163                 if (link_dest
1164 #ifndef CAN_HARDLINK_SYMLINK
1165                  && !S_ISLNK(file->mode)
1166 #endif
1167 #ifndef CAN_HARDLINK_SPECIAL
1168                  && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
1169 #endif
1170                  && !S_ISDIR(file->mode)) {
1171                         if (do_link(cmpbuf, fname) < 0) {
1172                                 rsyserr(FERROR_XFER, errno,
1173                                         "failed to hard-link %s with %s",
1174                                         cmpbuf, fname);
1175                                 return j;
1176                         }
1177                         if (preserve_hard_links && F_IS_HLINKED(file))
1178                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1179                 } else
1180 #endif
1181                         match_level = 2;
1182                 if (itemizing && stdout_format_has_i
1183                  && (verbose > 1 || stdout_format_has_i > 1)) {
1184                         int chg = compare_dest && type != TYPE_DIR ? 0
1185                             : ITEM_LOCAL_CHANGE + (match_level == 3 ? ITEM_XNAME_FOLLOWS : 0);
1186                         char *lp = match_level == 3 ? "" : NULL;
1187                         itemize(cmpbuf, file, ndx, 0, sxp, chg + ITEM_MATCHED, 0, lp);
1188                 }
1189                 if (verbose > 1 && maybe_ATTRS_REPORT) {
1190                         rprintf(FCLIENT, "%s%s is uptodate\n",
1191                                 fname, type == TYPE_DIR ? "/" : "");
1192                 }
1193                 return -2;
1194         }
1195
1196         return j;
1197 }
1198
1199 static void list_file_entry(struct file_struct *f)
1200 {
1201         char permbuf[PERMSTRING_SIZE];
1202         double len;
1203
1204         if (!F_IS_ACTIVE(f)) {
1205                 /* this can happen if duplicate names were removed */
1206                 return;
1207         }
1208
1209         permstring(permbuf, f->mode);
1210         len = F_LENGTH(f);
1211
1212         /* TODO: indicate '+' if the entry has an ACL. */
1213
1214 #ifdef SUPPORT_LINKS
1215         if (preserve_links && S_ISLNK(f->mode)) {
1216                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
1217                         permbuf, len, timestring(f->modtime),
1218                         f_name(f, NULL), F_SYMLINK(f));
1219         } else
1220 #endif
1221         {
1222                 rprintf(FINFO, "%s %11.0f %s %s\n",
1223                         permbuf, len, timestring(f->modtime),
1224                         f_name(f, NULL));
1225         }
1226 }
1227
1228 static int phase = 0;
1229 static int dflt_perms;
1230
1231 static int implied_dirs_are_missing;
1232 /* Helper for recv_generator's skip_dir and dry_missing_dir tests. */
1233 static BOOL is_below(struct file_struct *file, struct file_struct *subtree)
1234 {
1235         return F_DEPTH(file) > F_DEPTH(subtree)
1236                 && (!implied_dirs_are_missing || f_name_has_prefix(file, subtree));
1237 }
1238
1239 /* Acts on the indicated item in cur_flist whose name is fname.  If a dir,
1240  * make sure it exists, and has the right permissions/timestamp info.  For
1241  * all other non-regular files (symlinks, etc.) we create them here.  For
1242  * regular files that have changed, we try to find a basis file and then
1243  * start sending checksums.  The ndx is the file's unique index value.
1244  *
1245  * The fname parameter must point to a MAXPATHLEN buffer!  (e.g it gets
1246  * passed to delete_item(), which can use it during a recursive delete.)
1247  *
1248  * Note that f_out is set to -1 when doing final directory-permission and
1249  * modification-time repair. */
1250 static void recv_generator(char *fname, struct file_struct *file, int ndx,
1251                            int itemizing, enum logcode code, int f_out)
1252 {
1253         static const char *parent_dirname = "";
1254         /* Missing dir not created due to --dry-run; will still be scanned. */
1255         static struct file_struct *dry_missing_dir = NULL;
1256         /* Missing dir whose contents are skipped altogether due to
1257          * --ignore-non-existing, daemon exclude, or mkdir failure. */
1258         static struct file_struct *skip_dir = NULL;
1259         static struct file_list *fuzzy_dirlist = NULL;
1260         static int need_fuzzy_dirlist = 0;
1261         struct file_struct *fuzzy_file = NULL;
1262         int fd = -1, f_copy = -1;
1263         stat_x sx, real_sx;
1264         STRUCT_STAT partial_st;
1265         struct file_struct *back_file = NULL;
1266         int statret, real_ret, stat_errno;
1267         char *fnamecmp, *partialptr, *backupptr = NULL;
1268         char fnamecmpbuf[MAXPATHLEN];
1269         uchar fnamecmp_type;
1270         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1271         int is_dir = !S_ISDIR(file->mode) ? 0
1272                    : inc_recurse && ndx != cur_flist->ndx_start - 1 ? -1
1273                    : 1;
1274
1275         if (verbose > 2)
1276                 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
1277
1278         if (list_only) {
1279                 if (is_dir < 0
1280                  || (is_dir && !implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1281                         return;
1282                 list_file_entry(file);
1283                 return;
1284         }
1285
1286         if (skip_dir) {
1287                 if (is_below(file, skip_dir)) {
1288                         if (is_dir)
1289                                 file->flags |= FLAG_MISSING_DIR;
1290 #ifdef SUPPORT_HARD_LINKS
1291                         else if (F_IS_HLINKED(file))
1292                                 handle_skipped_hlink(file, itemizing, code, f_out);
1293 #endif
1294                         return;
1295                 }
1296                 skip_dir = NULL;
1297         }
1298
1299         if (daemon_filter_list.head && (*fname != '.' || fname[1])) {
1300                 if (check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
1301                         if (is_dir < 0)
1302                                 return;
1303 #ifdef SUPPORT_HARD_LINKS
1304                         if (F_IS_HLINKED(file))
1305                                 handle_skipped_hlink(file, itemizing, code, f_out);
1306 #endif
1307                         rprintf(FERROR_XFER,
1308                                 "skipping daemon-excluded %s \"%s\"\n",
1309                                 is_dir ? "directory" : "file", fname);
1310                         if (is_dir)
1311                                 goto skipping_dir_contents;
1312                         return;
1313                 }
1314         }
1315
1316 #ifdef SUPPORT_ACLS
1317         sx.acc_acl = sx.def_acl = NULL;
1318 #endif
1319 #ifdef SUPPORT_XATTRS
1320         sx.xattr = NULL;
1321 #endif
1322         if (dry_run > 1 || (dry_missing_dir && is_below(file, dry_missing_dir))) {
1323           parent_is_dry_missing:
1324                 if (fuzzy_dirlist) {
1325                         flist_free(fuzzy_dirlist);
1326                         fuzzy_dirlist = NULL;
1327                 }
1328                 parent_dirname = "";
1329                 statret = -1;
1330                 stat_errno = ENOENT;
1331         } else {
1332                 const char *dn = file->dirname ? file->dirname : ".";
1333                 dry_missing_dir = NULL;
1334                 if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
1335                         if (relative_paths && !implied_dirs
1336                          && do_stat(dn, &sx.st) < 0) {
1337                                 if (dry_run)
1338                                         goto parent_is_dry_missing;
1339                                 if (create_directory_path(fname) < 0) {
1340                                         rsyserr(FERROR_XFER, errno,
1341                                                 "recv_generator: mkdir %s failed",
1342                                                 full_fname(dn));
1343                                 }
1344                         }
1345                         if (fuzzy_dirlist) {
1346                                 flist_free(fuzzy_dirlist);
1347                                 fuzzy_dirlist = NULL;
1348                         }
1349                         if (fuzzy_basis)
1350                                 need_fuzzy_dirlist = 1;
1351 #ifdef SUPPORT_ACLS
1352                         if (!preserve_perms)
1353                                 dflt_perms = default_perms_for_dir(dn);
1354 #endif
1355                 }
1356                 parent_dirname = dn;
1357
1358                 if (need_fuzzy_dirlist && S_ISREG(file->mode)) {
1359                         strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf);
1360                         fuzzy_dirlist = get_dirlist(fnamecmpbuf, -1, 1);
1361                         need_fuzzy_dirlist = 0;
1362                 }
1363
1364                 statret = link_stat(fname, &sx.st, keep_dirlinks && is_dir);
1365                 stat_errno = errno;
1366         }
1367
1368         if (ignore_non_existing > 0 && statret == -1 && stat_errno == ENOENT) {
1369                 if (is_dir) {
1370                         if (is_dir < 0)
1371                                 return;
1372                         skip_dir = file;
1373                         file->flags |= FLAG_MISSING_DIR;
1374                 }
1375 #ifdef SUPPORT_HARD_LINKS
1376                 else if (F_IS_HLINKED(file))
1377                         handle_skipped_hlink(file, itemizing, code, f_out);
1378 #endif
1379                 if (verbose > 1) {
1380                         rprintf(FINFO, "not creating new %s \"%s\"\n",
1381                                 is_dir ? "directory" : "file", fname);
1382                 }
1383                 return;
1384         }
1385
1386         if (statret == 0 && !(sx.st.st_mode & S_IWUSR)
1387          && !am_root && sx.st.st_uid == our_uid)
1388                 del_opts |= DEL_NO_UID_WRITE;
1389
1390         if (ignore_existing > 0 && statret == 0
1391          && (!is_dir || !S_ISDIR(sx.st.st_mode))) {
1392                 if (verbose > 1 && is_dir >= 0)
1393                         rprintf(FINFO, "%s exists\n", fname);
1394 #ifdef SUPPORT_HARD_LINKS
1395                 if (F_IS_HLINKED(file))
1396                         handle_skipped_hlink(file, itemizing, code, f_out);
1397 #endif
1398                 goto cleanup;
1399         }
1400
1401         if (is_dir) {
1402                 if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
1403                         goto cleanup;
1404                 if (is_dir < 0) {
1405                         /* In inc_recurse mode we want to make sure any missing
1406                          * directories get created while we're still processing
1407                          * the parent dir (which allows us to touch the parent
1408                          * dir's mtime right away).  We will handle the dir in
1409                          * full later (right before we handle its contents). */
1410                         if (statret == 0
1411                          && (S_ISDIR(sx.st.st_mode)
1412                           || delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0))
1413                                 goto cleanup; /* Any errors get reported later. */
1414                         if (do_mkdir(fname, file->mode & 0700) == 0)
1415                                 file->flags |= FLAG_DIR_CREATED;
1416                         goto cleanup;
1417                 }
1418                 /* The file to be received is a directory, so we need
1419                  * to prepare appropriately.  If there is already a
1420                  * file of that name and it is *not* a directory, then
1421                  * we need to delete it.  If it doesn't exist, then
1422                  * (perhaps recursively) create it. */
1423                 if (statret == 0 && !S_ISDIR(sx.st.st_mode)) {
1424                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0)
1425                                 goto skipping_dir_contents;
1426                         statret = -1;
1427                 }
1428                 if (dry_run && statret != 0) {
1429                         if (!dry_missing_dir)
1430                                 dry_missing_dir = file;
1431                         file->flags |= FLAG_MISSING_DIR;
1432                 }
1433                 real_ret = statret;
1434                 real_sx = sx;
1435                 if (file->flags & FLAG_DIR_CREATED)
1436                         statret = -1;
1437                 if (!preserve_perms) { /* See comment in non-dir code below. */
1438                         file->mode = dest_mode(file->mode, sx.st.st_mode,
1439                                                dflt_perms, statret == 0);
1440                 }
1441                 if (statret != 0 && basis_dir[0] != NULL) {
1442                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1443                                               itemizing, code);
1444                         if (j == -2) {
1445                                 itemizing = 0;
1446                                 code = FNONE;
1447                         } else if (j >= 0)
1448                                 statret = 1;
1449                 }
1450                 if (itemizing && f_out != -1) {
1451                         itemize(fname, file, ndx, statret, &sx,
1452                                 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
1453                 }
1454                 if (real_ret != 0 && do_mkdir(fname,file->mode) < 0 && errno != EEXIST) {
1455                         if (!relative_paths || errno != ENOENT
1456                             || create_directory_path(fname) < 0
1457                             || (do_mkdir(fname, file->mode) < 0 && errno != EEXIST)) {
1458                                 rsyserr(FERROR_XFER, errno,
1459                                         "recv_generator: mkdir %s failed",
1460                                         full_fname(fname));
1461                           skipping_dir_contents:
1462                                 rprintf(FERROR,
1463                                     "*** Skipping any contents from this failed directory ***\n");
1464                                 skip_dir = file;
1465                                 file->flags |= FLAG_MISSING_DIR;
1466                                 goto cleanup;
1467                         }
1468                 }
1469                 if (set_file_attrs(fname, file, real_ret ? NULL : &real_sx, NULL, 0)
1470                     && verbose && code != FNONE && f_out != -1)
1471                         rprintf(code, "%s/\n", fname);
1472
1473                 /* We need to ensure that the dirs in the transfer have writable
1474                  * permissions during the time we are putting files within them.
1475                  * This is then fixed after the transfer is done. */
1476 #ifdef HAVE_CHMOD
1477                 if (!am_root && !(file->mode & S_IWUSR) && dir_tweaking) {
1478                         mode_t mode = file->mode | S_IWUSR;
1479                         if (do_chmod(fname, mode) < 0) {
1480                                 rsyserr(FERROR_XFER, errno,
1481                                         "failed to modify permissions on %s",
1482                                         full_fname(fname));
1483                         }
1484                         need_retouch_dir_perms = 1;
1485                 }
1486 #endif
1487
1488                 if (real_ret != 0 && one_file_system)
1489                         real_sx.st.st_dev = filesystem_dev;
1490                 if (inc_recurse) {
1491                         if (one_file_system) {
1492                                 uint32 *devp = F_DIR_DEV_P(file);
1493                                 DEV_MAJOR(devp) = major(real_sx.st.st_dev);
1494                                 DEV_MINOR(devp) = minor(real_sx.st.st_dev);
1495                         }
1496                 }
1497                 else if (delete_during && f_out != -1 && !phase
1498                     && !(file->flags & FLAG_MISSING_DIR)) {
1499                         if (file->flags & FLAG_CONTENT_DIR)
1500                                 delete_in_dir(fname, file, &real_sx.st.st_dev);
1501                         else
1502                                 change_local_filter_dir(fname, strlen(fname), F_DEPTH(file));
1503                 }
1504                 goto cleanup;
1505         }
1506
1507         /* If we're not preserving permissions, change the file-list's
1508          * mode based on the local permissions and some heuristics. */
1509         if (!preserve_perms) {
1510                 int exists = statret == 0 && !S_ISDIR(sx.st.st_mode);
1511                 file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms,
1512                                        exists);
1513         }
1514
1515 #ifdef SUPPORT_HARD_LINKS
1516         if (preserve_hard_links && F_HLINK_NOT_FIRST(file)
1517          && hard_link_check(file, ndx, fname, statret, &sx, itemizing, code))
1518                 goto cleanup;
1519 #endif
1520
1521         if (preserve_links && S_ISLNK(file->mode)) {
1522 #ifdef SUPPORT_LINKS
1523                 const char *sl = F_SYMLINK(file);
1524                 if (safe_symlinks && unsafe_symlink(sl, fname)) {
1525                         if (verbose) {
1526                                 if (solo_file)
1527                                         fname = f_name(file, NULL);
1528                                 rprintf(FINFO,
1529                                         "ignoring unsafe symlink %s -> \"%s\"\n",
1530                                         full_fname(fname), sl);
1531                         }
1532                         return;
1533                 }
1534                 if (statret == 0) {
1535                         char lnk[MAXPATHLEN];
1536                         int len;
1537
1538                         if (!S_ISLNK(sx.st.st_mode))
1539                                 statret = -1;
1540                         else if ((len = readlink(fname, lnk, MAXPATHLEN-1)) > 0
1541                               && strncmp(lnk, sl, len) == 0 && sl[len] == '\0') {
1542                                 /* The link is pointing to the right place. */
1543                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1544                                 if (itemizing)
1545                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1546 #if defined SUPPORT_HARD_LINKS && defined CAN_HARDLINK_SYMLINK
1547                                 if (preserve_hard_links && F_IS_HLINKED(file))
1548                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1549 #endif
1550                                 if (remove_source_files == 1)
1551                                         goto return_with_success;
1552                                 goto cleanup;
1553                         }
1554                         /* Not the right symlink (or not a symlink), so
1555                          * delete it. */
1556                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_SYMLINK) != 0)
1557                                 goto cleanup;
1558                 } else if (basis_dir[0] != NULL) {
1559                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1560                                               itemizing, code);
1561                         if (j == -2) {
1562 #ifndef CAN_HARDLINK_SYMLINK
1563                                 if (link_dest) {
1564                                         /* Resort to --copy-dest behavior. */
1565                                 } else
1566 #endif
1567                                 if (!copy_dest)
1568                                         goto cleanup;
1569                                 itemizing = 0;
1570                                 code = FNONE;
1571                         } else if (j >= 0)
1572                                 statret = 1;
1573                 }
1574 #ifdef SUPPORT_HARD_LINKS
1575                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1576                         cur_flist->in_progress++;
1577                         goto cleanup;
1578                 }
1579 #endif
1580                 if (do_symlink(sl, fname) != 0) {
1581                         rsyserr(FERROR_XFER, errno, "symlink %s -> \"%s\" failed",
1582                                 full_fname(fname), sl);
1583                 } else {
1584                         set_file_attrs(fname, file, NULL, NULL, 0);
1585                         if (itemizing) {
1586                                 itemize(fname, file, ndx, statret, &sx,
1587                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1588                         }
1589                         if (code != FNONE && verbose)
1590                                 rprintf(code, "%s -> %s\n", fname, sl);
1591 #ifdef SUPPORT_HARD_LINKS
1592                         if (preserve_hard_links && F_IS_HLINKED(file))
1593                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1594 #endif
1595                         /* This does not check remove_source_files == 1
1596                          * because this is one of the items that the old
1597                          * --remove-sent-files option would remove. */
1598                         if (remove_source_files)
1599                                 goto return_with_success;
1600                 }
1601 #endif
1602                 goto cleanup;
1603         }
1604
1605         if ((am_root && preserve_devices && IS_DEVICE(file->mode))
1606          || (preserve_specials && IS_SPECIAL(file->mode))) {
1607                 uint32 *devp = F_RDEV_P(file);
1608                 dev_t rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
1609                 if (statret == 0) {
1610                         int del_for_flag;
1611                         if (IS_DEVICE(file->mode)) {
1612                                 if (!IS_DEVICE(sx.st.st_mode))
1613                                         statret = -1;
1614                                 del_for_flag = DEL_FOR_DEVICE;
1615                         } else {
1616                                 if (!IS_SPECIAL(sx.st.st_mode))
1617                                         statret = -1;
1618                                 del_for_flag = DEL_FOR_SPECIAL;
1619                         }
1620                         if (statret == 0
1621                          && BITS_EQUAL(sx.st.st_mode, file->mode, _S_IFMT)
1622                          && sx.st.st_rdev == rdev) {
1623                                 /* The device or special file is identical. */
1624                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1625                                 if (itemizing)
1626                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1627 #ifdef SUPPORT_HARD_LINKS
1628                                 if (preserve_hard_links && F_IS_HLINKED(file))
1629                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1630 #endif
1631                                 if (remove_source_files == 1)
1632                                         goto return_with_success;
1633                                 goto cleanup;
1634                         }
1635                         if (delete_item(fname, sx.st.st_mode, del_opts | del_for_flag) != 0)
1636                                 goto cleanup;
1637                 } else if (basis_dir[0] != NULL) {
1638                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1639                                               itemizing, code);
1640                         if (j == -2) {
1641 #ifndef CAN_HARDLINK_SPECIAL
1642                                 if (link_dest) {
1643                                         /* Resort to --copy-dest behavior. */
1644                                 } else
1645 #endif
1646                                 if (!copy_dest)
1647                                         goto cleanup;
1648                                 itemizing = 0;
1649                                 code = FNONE;
1650                         } else if (j >= 0)
1651                                 statret = 1;
1652                 }
1653 #ifdef SUPPORT_HARD_LINKS
1654                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1655                         cur_flist->in_progress++;
1656                         goto cleanup;
1657                 }
1658 #endif
1659                 if (verbose > 2) {
1660                         rprintf(FINFO, "mknod(%s, 0%o, [%ld,%ld])\n",
1661                                 fname, (int)file->mode,
1662                                 (long)major(rdev), (long)minor(rdev));
1663                 }
1664                 if (do_mknod(fname, file->mode, rdev) < 0) {
1665                         rsyserr(FERROR_XFER, errno, "mknod %s failed",
1666                                 full_fname(fname));
1667                 } else {
1668                         set_file_attrs(fname, file, NULL, NULL, 0);
1669                         if (itemizing) {
1670                                 itemize(fname, file, ndx, statret, &sx,
1671                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1672                         }
1673                         if (code != FNONE && verbose)
1674                                 rprintf(code, "%s\n", fname);
1675 #ifdef SUPPORT_HARD_LINKS
1676                         if (preserve_hard_links && F_IS_HLINKED(file))
1677                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1678 #endif
1679                         if (remove_source_files == 1)
1680                                 goto return_with_success;
1681                 }
1682                 goto cleanup;
1683         }
1684
1685         if (!S_ISREG(file->mode)) {
1686                 if (solo_file)
1687                         fname = f_name(file, NULL);
1688                 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1689                 goto cleanup;
1690         }
1691
1692         if (max_size > 0 && F_LENGTH(file) > max_size) {
1693                 if (verbose > 1) {
1694                         if (solo_file)
1695                                 fname = f_name(file, NULL);
1696                         rprintf(FINFO, "%s is over max-size\n", fname);
1697                 }
1698                 goto cleanup;
1699         }
1700         if (min_size > 0 && F_LENGTH(file) < min_size) {
1701                 if (verbose > 1) {
1702                         if (solo_file)
1703                                 fname = f_name(file, NULL);
1704                         rprintf(FINFO, "%s is under min-size\n", fname);
1705                 }
1706                 goto cleanup;
1707         }
1708
1709         if (update_only > 0 && statret == 0
1710             && cmp_time(sx.st.st_mtime, file->modtime) > 0) {
1711                 if (verbose > 1)
1712                         rprintf(FINFO, "%s is newer\n", fname);
1713 #ifdef SUPPORT_HARD_LINKS
1714                 if (F_IS_HLINKED(file))
1715                         handle_skipped_hlink(file, itemizing, code, f_out);
1716 #endif
1717                 goto cleanup;
1718         }
1719
1720         fnamecmp = fname;
1721         fnamecmp_type = FNAMECMP_FNAME;
1722
1723         if (statret == 0 && !S_ISREG(sx.st.st_mode)) {
1724                 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_FILE) != 0)
1725                         goto cleanup;
1726                 statret = -1;
1727                 stat_errno = ENOENT;
1728         }
1729
1730         if (statret != 0 && basis_dir[0] != NULL) {
1731                 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &sx,
1732                                       itemizing, code);
1733                 if (j == -2) {
1734                         if (remove_source_files == 1)
1735                                 goto return_with_success;
1736                         goto cleanup;
1737                 }
1738                 if (j >= 0) {
1739                         fnamecmp = fnamecmpbuf;
1740                         fnamecmp_type = j;
1741                         statret = 0;
1742                 }
1743         }
1744
1745         real_ret = statret;
1746         real_sx = sx;
1747
1748         if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1749             && link_stat(partialptr, &partial_st, 0) == 0
1750             && S_ISREG(partial_st.st_mode)) {
1751                 if (statret != 0)
1752                         goto prepare_to_open;
1753         } else
1754                 partialptr = NULL;
1755
1756         if (statret != 0 && fuzzy_dirlist) {
1757                 int j = find_fuzzy(file, fuzzy_dirlist);
1758                 if (j >= 0) {
1759                         fuzzy_file = fuzzy_dirlist->files[j];
1760                         f_name(fuzzy_file, fnamecmpbuf);
1761                         if (verbose > 2) {
1762                                 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1763                                         fname, fnamecmpbuf);
1764                         }
1765                         sx.st.st_size = F_LENGTH(fuzzy_file);
1766                         statret = 0;
1767                         fnamecmp = fnamecmpbuf;
1768                         fnamecmp_type = FNAMECMP_FUZZY;
1769                 }
1770         }
1771
1772         if (statret != 0) {
1773 #ifdef SUPPORT_HARD_LINKS
1774                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1775                         cur_flist->in_progress++;
1776                         goto cleanup;
1777                 }
1778 #endif
1779                 if (stat_errno == ENOENT)
1780                         goto notify_others;
1781                 rsyserr(FERROR_XFER, stat_errno, "recv_generator: failed to stat %s",
1782                         full_fname(fname));
1783                 goto cleanup;
1784         }
1785
1786         if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1787                 ;
1788         else if (fnamecmp_type == FNAMECMP_FUZZY)
1789                 ;
1790         else if (unchanged_file(fnamecmp, file, &sx.st)) {
1791                 if (partialptr) {
1792                         do_unlink(partialptr);
1793                         handle_partial_dir(partialptr, PDIR_DELETE);
1794                 }
1795                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1796                 if (itemizing)
1797                         itemize(fnamecmp, file, ndx, statret, &sx, 0, 0, NULL);
1798 #ifdef SUPPORT_HARD_LINKS
1799                 if (preserve_hard_links && F_IS_HLINKED(file))
1800                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1801 #endif
1802                 if (remove_source_files != 1)
1803                         goto cleanup;
1804           return_with_success:
1805                 if (!dry_run)
1806                         send_msg_int(MSG_SUCCESS, ndx);
1807                 goto cleanup;
1808         }
1809
1810         if (append_mode > 0 && sx.st.st_size >= F_LENGTH(file)) {
1811 #ifdef SUPPORT_HARD_LINKS
1812                 if (F_IS_HLINKED(file))
1813                         handle_skipped_hlink(file, itemizing, code, f_out);
1814 #endif
1815                 goto cleanup;
1816         }
1817
1818   prepare_to_open:
1819         if (partialptr) {
1820                 sx.st = partial_st;
1821                 fnamecmp = partialptr;
1822                 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1823                 statret = 0;
1824         }
1825
1826         if (!do_xfers)
1827                 goto notify_others;
1828
1829         if (read_batch || whole_file) {
1830                 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1831                         if (!(backupptr = get_backup_name(fname)))
1832                                 goto cleanup;
1833                         if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
1834                                 goto pretend_missing;
1835                         if (copy_file(fname, backupptr, -1, back_file->mode, 1) < 0) {
1836                                 unmake_file(back_file);
1837                                 back_file = NULL;
1838                                 goto cleanup;
1839                         }
1840                 }
1841                 goto notify_others;
1842         }
1843
1844         if (fuzzy_dirlist) {
1845                 int j = flist_find(fuzzy_dirlist, file);
1846                 if (j >= 0) /* don't use changing file as future fuzzy basis */
1847                         fuzzy_dirlist->files[j]->flags |= FLAG_FILE_SENT;
1848         }
1849
1850         /* open the file */
1851         if ((fd = do_open(fnamecmp, O_RDONLY, 0)) < 0) {
1852                 rsyserr(FERROR, errno, "failed to open %s, continuing",
1853                         full_fname(fnamecmp));
1854           pretend_missing:
1855                 /* pretend the file didn't exist */
1856 #ifdef SUPPORT_HARD_LINKS
1857                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1858                         cur_flist->in_progress++;
1859                         goto cleanup;
1860                 }
1861 #endif
1862                 statret = real_ret = -1;
1863                 goto notify_others;
1864         }
1865
1866         if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1867                 if (!(backupptr = get_backup_name(fname))) {
1868                         close(fd);
1869                         goto cleanup;
1870                 }
1871                 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1872                         close(fd);
1873                         goto pretend_missing;
1874                 }
1875                 if (robust_unlink(backupptr) && errno != ENOENT) {
1876                         rsyserr(FERROR_XFER, errno, "unlink %s",
1877                                 full_fname(backupptr));
1878                         unmake_file(back_file);
1879                         back_file = NULL;
1880                         close(fd);
1881                         goto cleanup;
1882                 }
1883                 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1884                         int save_errno = errno ? errno : EINVAL; /* 0 paranoia */
1885                         if (errno == ENOENT && make_bak_dir(backupptr) == 0) {
1886                                 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0)
1887                                         save_errno = errno ? errno : save_errno;
1888                                 else
1889                                         save_errno = 0;
1890                         }
1891                         if (save_errno) {
1892                                 rsyserr(FERROR_XFER, save_errno, "open %s", full_fname(backupptr));
1893                                 unmake_file(back_file);
1894                                 back_file = NULL;
1895                                 close(fd);
1896                                 goto cleanup;
1897                         }
1898                 }
1899                 fnamecmp_type = FNAMECMP_BACKUP;
1900         }
1901
1902         if (verbose > 3) {
1903                 rprintf(FINFO, "gen mapped %s of size %.0f\n",
1904                         fnamecmp, (double)sx.st.st_size);
1905         }
1906
1907         if (verbose > 2)
1908                 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1909
1910   notify_others:
1911         if (remove_source_files && !delay_updates && !phase && !dry_run)
1912                 increment_active_files(ndx, itemizing, code);
1913         if (inc_recurse && !dry_run)
1914                 cur_flist->in_progress++;
1915 #ifdef SUPPORT_HARD_LINKS
1916         if (preserve_hard_links && F_IS_HLINKED(file))
1917                 file->flags |= FLAG_FILE_SENT;
1918 #endif
1919         write_ndx(f_out, ndx);
1920         if (itemizing) {
1921                 int iflags = ITEM_TRANSFER;
1922                 if (always_checksum > 0)
1923                         iflags |= ITEM_REPORT_CHANGE;
1924                 if (fnamecmp_type != FNAMECMP_FNAME)
1925                         iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1926                 if (fnamecmp_type == FNAMECMP_FUZZY)
1927                         iflags |= ITEM_XNAME_FOLLOWS;
1928                 itemize(fnamecmp, file, -1, real_ret, &real_sx, iflags, fnamecmp_type,
1929                         fuzzy_file ? fuzzy_file->basename : NULL);
1930 #ifdef SUPPORT_ACLS
1931                 if (preserve_acls)
1932                         free_acl(&real_sx);
1933 #endif
1934 #ifdef SUPPORT_XATTRS
1935                 if (preserve_xattrs)
1936                         free_xattr(&real_sx);
1937 #endif
1938         }
1939
1940         if (!do_xfers) {
1941 #ifdef SUPPORT_HARD_LINKS
1942                 if (preserve_hard_links && F_IS_HLINKED(file))
1943                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1944 #endif
1945                 goto cleanup;
1946         }
1947         if (read_batch)
1948                 goto cleanup;
1949
1950         if (statret != 0 || whole_file || sx.st.st_size <= 0)
1951                 write_sum_head(f_out, NULL);
1952         else {
1953                 if (generate_and_send_sums(fd, sx.st.st_size, f_out, f_copy) < 0) {
1954                         rprintf(FWARNING,
1955                             "WARNING: file is too large for checksum sending: %s\n",
1956                             fnamecmp);
1957                         write_sum_head(f_out, NULL);
1958                 }
1959                 close(fd);
1960         }
1961
1962   cleanup:
1963         if (back_file) {
1964                 int save_preserve_xattrs = preserve_xattrs;
1965                 if (f_copy >= 0)
1966                         close(f_copy);
1967 #ifdef SUPPORT_XATTRS
1968                 if (preserve_xattrs) {
1969                         copy_xattrs(fname, backupptr);
1970                         preserve_xattrs = 0;
1971                 }
1972 #endif
1973                 set_file_attrs(backupptr, back_file, NULL, NULL, 0);
1974                 preserve_xattrs = save_preserve_xattrs;
1975                 if (verbose > 1) {
1976                         rprintf(FINFO, "backed up %s to %s\n",
1977                                 fname, backupptr);
1978                 }
1979                 unmake_file(back_file);
1980         }
1981
1982 #ifdef SUPPORT_ACLS
1983         if (preserve_acls)
1984                 free_acl(&sx);
1985 #endif
1986 #ifdef SUPPORT_XATTRS
1987         if (preserve_xattrs)
1988                 free_xattr(&sx);
1989 #endif
1990         return;
1991 }
1992
1993 #ifdef SUPPORT_HARD_LINKS
1994 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
1995                                  enum logcode code, int f_out)
1996 {
1997         char fbuf[MAXPATHLEN];
1998         int new_last_ndx;
1999         struct file_list *save_flist = cur_flist;
2000
2001         /* If we skip the last item in a chain of links and there was a
2002          * prior non-skipped hard-link waiting to finish, finish it now. */
2003         if ((new_last_ndx = skip_hard_link(file, &cur_flist)) < 0)
2004                 return;
2005
2006         file = cur_flist->files[new_last_ndx - cur_flist->ndx_start];
2007         cur_flist->in_progress--; /* undo prior increment */
2008         f_name(file, fbuf);
2009         recv_generator(fbuf, file, new_last_ndx, itemizing, code, f_out);
2010
2011         cur_flist = save_flist;
2012 }
2013 #endif
2014
2015 static void touch_up_dirs(struct file_list *flist, int ndx)
2016 {
2017         static int counter = 0;
2018         struct file_struct *file;
2019         char *fname;
2020         int i, start, end;
2021
2022         if (ndx < 0) {
2023                 start = 0;
2024                 end = flist->used - 1;
2025         } else
2026                 start = end = ndx;
2027
2028         /* Fix any directory permissions that were modified during the
2029          * transfer and/or re-set any tweaked modified-time values. */
2030         for (i = start; i <= end; i++, counter++) {
2031                 file = flist->files[i];
2032                 if (!S_ISDIR(file->mode)
2033                  || (!implied_dirs && file->flags & FLAG_IMPLIED_DIR))
2034                         continue;
2035                 if (verbose > 3) {
2036                         fname = f_name(file, NULL);
2037                         rprintf(FINFO, "touch_up_dirs: %s (%d)\n",
2038                                 NS(fname), i);
2039                 }
2040                 if (!F_IS_ACTIVE(file) || file->flags & FLAG_MISSING_DIR
2041                  || (!need_retouch_dir_times && file->mode & S_IWUSR))
2042                         continue;
2043                 fname = f_name(file, NULL);
2044                 if (!(file->mode & S_IWUSR))
2045                         do_chmod(fname, file->mode);
2046                 if (need_retouch_dir_times) {
2047                         STRUCT_STAT st;
2048                         if (link_stat(fname, &st, 0) == 0
2049                          && cmp_time(st.st_mtime, file->modtime) != 0)
2050                                 set_modtime(fname, file->modtime, file->mode);
2051                 }
2052                 if (allowed_lull && !(counter % lull_mod))
2053                         maybe_send_keepalive();
2054                 else if (!(counter & 0xFF))
2055                         maybe_flush_socket(0);
2056         }
2057 }
2058
2059 void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
2060 {
2061         struct file_struct *file;
2062         struct file_list *flist;
2063         char fbuf[MAXPATHLEN];
2064         int ndx;
2065
2066         while (1) {
2067 #ifdef SUPPORT_HARD_LINKS
2068                 if (preserve_hard_links && (ndx = get_hlink_num()) != -1) {
2069                         flist = flist_for_ndx(ndx);
2070                         assert(flist != NULL);
2071                         file = flist->files[ndx - flist->ndx_start];
2072                         assert(file->flags & FLAG_HLINKED);
2073                         finish_hard_link(file, f_name(file, fbuf), ndx, NULL, itemizing, code, -1);
2074                         flist->in_progress--;
2075                         continue;
2076                 }
2077 #endif
2078
2079                 if (check_redo && (ndx = get_redo_num()) != -1) {
2080                         csum_length = SUM_LENGTH;
2081                         max_size = -max_size;
2082                         min_size = -min_size;
2083                         ignore_existing = -ignore_existing;
2084                         ignore_non_existing = -ignore_non_existing;
2085                         update_only = -update_only;
2086                         always_checksum = -always_checksum;
2087                         size_only = -size_only;
2088                         append_mode = -append_mode;
2089                         make_backups = -make_backups; /* avoid dup backup w/inplace */
2090                         ignore_times++;
2091
2092                         flist = cur_flist;
2093                         cur_flist = flist_for_ndx(ndx);
2094
2095                         file = cur_flist->files[ndx - cur_flist->ndx_start];
2096                         if (solo_file)
2097                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2098                         else
2099                                 f_name(file, fbuf);
2100                         recv_generator(fbuf, file, ndx, itemizing, code, sock_f_out);
2101                         cur_flist->to_redo--;
2102
2103                         cur_flist = flist;
2104
2105                         csum_length = SHORT_SUM_LENGTH;
2106                         max_size = -max_size;
2107                         min_size = -min_size;
2108                         ignore_existing = -ignore_existing;
2109                         ignore_non_existing = -ignore_non_existing;
2110                         update_only = -update_only;
2111                         always_checksum = -always_checksum;
2112                         size_only = -size_only;
2113                         append_mode = -append_mode;
2114                         make_backups = -make_backups;
2115                         ignore_times--;
2116                         continue;
2117                 }
2118
2119                 if (cur_flist == first_flist)
2120                         break;
2121
2122                 /* We only get here if inc_recurse is enabled. */
2123                 if (first_flist->in_progress || first_flist->to_redo)
2124                         break;
2125
2126                 if (!read_batch) {
2127                         write_ndx(sock_f_out, NDX_DONE);
2128                         maybe_flush_socket(1);
2129                 }
2130
2131                 if (delete_during == 2 || !dir_tweaking) {
2132                         /* Skip directory touch-up. */
2133                 } else if (first_flist->parent_ndx >= 0)
2134                         touch_up_dirs(dir_flist, first_flist->parent_ndx);
2135
2136                 flist_free(first_flist); /* updates first_flist */
2137         }
2138 }
2139
2140 void generate_files(int f_out, const char *local_name)
2141 {
2142         int i, ndx;
2143         char fbuf[MAXPATHLEN];
2144         int itemizing;
2145         enum logcode code;
2146         int save_do_progress = do_progress;
2147
2148         if (protocol_version >= 29) {
2149                 itemizing = 1;
2150                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2151                 code = logfile_format_has_i ? FNONE : FLOG;
2152         } else if (am_daemon) {
2153                 itemizing = logfile_format_has_i && do_xfers;
2154                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2155                 code = itemizing || !do_xfers ? FCLIENT : FINFO;
2156         } else if (!am_server) {
2157                 itemizing = stdout_format_has_i;
2158                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2159                 code = itemizing ? FNONE : FINFO;
2160         } else {
2161                 itemizing = 0;
2162                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2163                 code = FINFO;
2164         }
2165         solo_file = local_name;
2166         dir_tweaking = !(list_only || solo_file || dry_run);
2167         need_retouch_dir_times = preserve_times > 1;
2168         lull_mod = allowed_lull * 5;
2169         symlink_timeset_failed_flags = ITEM_REPORT_TIME
2170             | (protocol_version >= 30 || !am_server ? ITEM_REPORT_TIMEFAIL : 0);
2171         implied_dirs_are_missing = relative_paths && !implied_dirs && protocol_version < 30;
2172
2173         if (verbose > 2)
2174                 rprintf(FINFO, "generator starting pid=%ld\n", (long)getpid());
2175
2176         if (delete_before && !solo_file && cur_flist->used > 0)
2177                 do_delete_pass();
2178         if (delete_during == 2) {
2179                 deldelay_size = BIGPATHBUFLEN * 4;
2180                 deldelay_buf = new_array(char, deldelay_size);
2181                 if (!deldelay_buf)
2182                         out_of_memory("delete-delay");
2183         }
2184         do_progress = 0;
2185
2186         if (append_mode > 0 || whole_file < 0)
2187                 whole_file = 0;
2188         if (verbose >= 2) {
2189                 rprintf(FINFO, "delta-transmission %s\n",
2190                         whole_file
2191                         ? "disabled for local transfer or --whole-file"
2192                         : "enabled");
2193         }
2194
2195         /* Since we often fill up the outgoing socket and then just sit around
2196          * waiting for the other 2 processes to do their thing, we don't want
2197          * to exit on a timeout.  If the data stops flowing, the receiver will
2198          * notice that and let us know via the redo pipe (or its closing). */
2199         ignore_timeout = 1;
2200
2201         dflt_perms = (ACCESSPERMS & ~orig_umask);
2202
2203         do {
2204 #ifdef SUPPORT_HARD_LINKS
2205                 if (preserve_hard_links && inc_recurse) {
2206                         while (!flist_eof && file_total < FILECNT_LOOKAHEAD/2)
2207                                 wait_for_receiver();
2208                 }
2209 #endif
2210
2211                 if (inc_recurse && cur_flist->parent_ndx >= 0) {
2212                         struct file_struct *fp = dir_flist->files[cur_flist->parent_ndx];
2213                         f_name(fp, fbuf);
2214                         ndx = cur_flist->ndx_start - 1;
2215                         recv_generator(fbuf, fp, ndx, itemizing, code, f_out);
2216                         if (delete_during && dry_run < 2 && !list_only
2217                          && !(fp->flags & FLAG_MISSING_DIR)) {
2218                                 if (fp->flags & FLAG_CONTENT_DIR) {
2219                                         dev_t dirdev;
2220                                         if (one_file_system) {
2221                                                 uint32 *devp = F_DIR_DEV_P(fp);
2222                                                 dirdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
2223                                         } else
2224                                                 dirdev = MAKEDEV(0, 0);
2225                                         delete_in_dir(fbuf, fp, &dirdev);
2226                                 } else
2227                                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(fp));
2228                         }
2229                 }
2230                 for (i = cur_flist->low; i <= cur_flist->high; i++) {
2231                         struct file_struct *file = cur_flist->sorted[i];
2232
2233                         if (!F_IS_ACTIVE(file))
2234                                 continue;
2235
2236                         if (unsort_ndx)
2237                                 ndx = F_NDX(file);
2238                         else
2239                                 ndx = i + cur_flist->ndx_start;
2240
2241                         if (solo_file)
2242                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2243                         else
2244                                 f_name(file, fbuf);
2245                         recv_generator(fbuf, file, ndx, itemizing, code, f_out);
2246
2247                         check_for_finished_files(itemizing, code, 0);
2248
2249                         if (allowed_lull && !(i % lull_mod))
2250                                 maybe_send_keepalive();
2251                         else if (!(i & 0xFF))
2252                                 maybe_flush_socket(0);
2253                 }
2254
2255                 if (!inc_recurse) {
2256                         write_ndx(f_out, NDX_DONE);
2257                         break;
2258                 }
2259
2260                 while (1) {
2261                         check_for_finished_files(itemizing, code, 1);
2262                         if (cur_flist->next || flist_eof)
2263                                 break;
2264                         wait_for_receiver();
2265                 }
2266         } while ((cur_flist = cur_flist->next) != NULL);
2267
2268         if (delete_during)
2269                 delete_in_dir(NULL, NULL, &dev_zero);
2270         phase++;
2271         if (verbose > 2)
2272                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2273
2274         while (1) {
2275                 check_for_finished_files(itemizing, code, 1);
2276                 if (msgdone_cnt)
2277                         break;
2278                 wait_for_receiver();
2279         }
2280
2281         phase++;
2282         if (verbose > 2)
2283                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2284
2285         write_ndx(f_out, NDX_DONE);
2286         /* Reduce round-trip lag-time for a useless delay-updates phase. */
2287         if (protocol_version >= 29 && !delay_updates)
2288                 write_ndx(f_out, NDX_DONE);
2289
2290         /* Read MSG_DONE for the redo phase (and any prior messages). */
2291         while (1) {
2292                 check_for_finished_files(itemizing, code, 0);
2293                 if (msgdone_cnt > 1)
2294                         break;
2295                 wait_for_receiver();
2296         }
2297
2298         if (protocol_version >= 29) {
2299                 phase++;
2300                 if (verbose > 2)
2301                         rprintf(FINFO, "generate_files phase=%d\n", phase);
2302                 if (delay_updates)
2303                         write_ndx(f_out, NDX_DONE);
2304                 /* Read MSG_DONE for delay-updates phase & prior messages. */
2305                 while (msgdone_cnt == 2)
2306                         wait_for_receiver();
2307         }
2308
2309         do_progress = save_do_progress;
2310         if (delete_during == 2)
2311                 do_delayed_deletions(fbuf);
2312         if (delete_after && !solo_file && file_total > 0)
2313                 do_delete_pass();
2314
2315         if ((need_retouch_dir_perms || need_retouch_dir_times)
2316          && dir_tweaking && (!inc_recurse || delete_during == 2))
2317                 touch_up_dirs(dir_flist, -1);
2318
2319         if (max_delete >= 0 && deletion_count > max_delete) {
2320                 rprintf(FINFO,
2321                         "Deletions stopped due to --max-delete limit (%d skipped)\n",
2322                         deletion_count - max_delete);
2323                 io_error |= IOERR_DEL_LIMIT;
2324         }
2325
2326         if (verbose > 2)
2327                 rprintf(FINFO, "generate_files finished\n");
2328 }