generator.c

   1 /*
   2  * Routines that are exclusive to the generator process.
   3  *
   4  * Copyright (C) 1996-2000 Andrew Tridgell
   5  * Copyright (C) 1996 Paul Mackerras
   6  * Copyright (C) 2002 Martin Pool <mbp@samba.org>
   7  * Copyright (C) 2003-2008 Wayne Davison
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 3 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, visit the http://fsf.org website.
  21  */
  22
  23 #include "rsync.h"
  24
  25 extern int verbose;
  26 extern int dry_run;
  27 extern int do_xfers;
  28 extern int stdout_format_has_i;
  29 extern int logfile_format_has_i;
  30 extern int am_root;
  31 extern int am_server;
  32 extern int am_daemon;
  33 extern int inc_recurse;
  34 extern int do_progress;
  35 extern int relative_paths;
  36 extern int implied_dirs;
  37 extern int keep_dirlinks;
  38 extern int preserve_acls;
  39 extern int preserve_xattrs;
  40 extern int preserve_links;
  41 extern int preserve_devices;
  42 extern int preserve_specials;
  43 extern int preserve_hard_links;
  44 extern int preserve_executability;
  45 extern int preserve_perms;
  46 extern int preserve_times;
  47 extern int uid_ndx;
  48 extern int gid_ndx;
  49 extern int delete_mode;
  50 extern int delete_before;
  51 extern int delete_during;
  52 extern int delete_after;
  53 extern int msgdone_cnt;
  54 extern int ignore_errors;
  55 extern int remove_source_files;
  56 extern int delay_updates;
  57 extern int update_only;
  58 extern int ignore_existing;
  59 extern int ignore_non_existing;
  60 extern int inplace;
  61 extern int append_mode;
  62 extern int make_backups;
  63 extern int csum_length;
  64 extern int ignore_times;
  65 extern int size_only;
  66 extern OFF_T max_size;
  67 extern OFF_T min_size;
  68 extern int io_error;
  69 extern int flist_eof;
  70 extern int allowed_lull;
  71 extern int sock_f_out;
  72 extern int ignore_timeout;
  73 extern int protocol_version;
  74 extern int file_total;
  75 extern int fuzzy_basis;
  76 extern int always_checksum;
  77 extern int checksum_len;
  78 extern char *partial_dir;
  79 extern char *basis_dir[];
  80 extern int compare_dest;
  81 extern int copy_dest;
  82 extern int link_dest;
  83 extern int whole_file;
  84 extern int list_only;
  85 extern int read_batch;
  86 extern int safe_symlinks;
  87 extern long block_size; /* "long" because popt can't set an int32. */
  88 extern int unsort_ndx;
  89 extern int max_delete;
  90 extern int force_delete;
  91 extern int one_file_system;
  92 extern struct stats stats;
  93 extern dev_t filesystem_dev;
  94 extern mode_t orig_umask;
  95 extern uid_t our_uid;
  96 extern char *backup_dir;
  97 extern char *backup_suffix;
  98 extern int backup_suffix_len;
  99 extern struct file_list *cur_flist, *first_flist, *dir_flist;
 100 extern struct filter_list_struct daemon_filter_list;
 101
 102 int ignore_perishable = 0;
 103 int non_perishable_cnt = 0;
 104 int maybe_ATTRS_REPORT = 0;
 105
 106 static dev_t dev_zero;
 107 static int deletion_count = 0; /* used to implement --max-delete */
 108 static int deldelay_size = 0, deldelay_cnt = 0;
 109 static char *deldelay_buf = NULL;
 110 static int deldelay_fd = -1;
 111 static int lull_mod;
 112 static int dir_tweaking;
 113 static int symlink_timeset_failed_flags;
 114 static int need_retouch_dir_times;
 115 static int need_retouch_dir_perms;
 116 static const char *solo_file = NULL;
 117
 118 /* For calling delete_item() and delete_dir_contents(). */
 119 #define DEL_NO_UID_WRITE        (1<<0) /* file/dir has our uid w/o write perm */
 120 #define DEL_RECURSE             (1<<1) /* if dir, delete all contents */
 121 #define DEL_DIR_IS_EMPTY        (1<<2) /* internal delete_FUNCTIONS use only */
 122 #define DEL_FOR_FILE            (1<<3) /* making room for a replacement file */
 123 #define DEL_FOR_DIR             (1<<4) /* making room for a replacement dir */
 124 #define DEL_FOR_SYMLINK         (1<<5) /* making room for a replacement symlink */
 125 #define DEL_FOR_DEVICE          (1<<6) /* making room for a replacement device */
 126 #define DEL_FOR_SPECIAL         (1<<7) /* making room for a replacement special */
 127
 128 #define DEL_MAKE_ROOM (DEL_FOR_FILE|DEL_FOR_DIR|DEL_FOR_SYMLINK|DEL_FOR_DEVICE|DEL_FOR_SPECIAL)
 129
 130 enum nonregtype {
 131     TYPE_DIR, TYPE_SPECIAL, TYPE_DEVICE, TYPE_SYMLINK
 132 };
 133
 134 enum delret {
 135     DR_SUCCESS = 0, DR_FAILURE, DR_AT_LIMIT, DR_NOT_EMPTY
 136 };
 137
 138 /* Forward declarations. */
 139 static enum delret delete_dir_contents(char *fname, uint16 flags);
 140 #ifdef SUPPORT_HARD_LINKS
 141 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
 142                                  enum logcode code, int f_out);
 143 #endif
 144
 145 static int is_backup_file(char *fn)
 146 {
 147         int k = strlen(fn) - backup_suffix_len;
 148         return k > 0 && strcmp(fn+k, backup_suffix) == 0;
 149 }
 150
 151 /* Delete a file or directory.  If DEL_RECURSE is set in the flags, this will
 152  * delete recursively.
 153  *
 154  * Note that fbuf must point to a MAXPATHLEN buffer if the mode indicates it's
 155  * a directory! (The buffer is used for recursion, but returned unchanged.)
 156  */
 157 static enum delret delete_item(char *fbuf, uint16 mode, uint16 flags)
 158 {
 159         enum delret ret;
 160         char *what;
 161         int ok;
 162
 163         if (verbose > 2) {
 164                 rprintf(FINFO, "delete_item(%s) mode=%o flags=%d\n",
 165                         fbuf, (int)mode, (int)flags);
 166         }
 167
 168         if (flags & DEL_NO_UID_WRITE)
 169                 do_chmod(fbuf, mode | S_IWUSR);
 170
 171         if (S_ISDIR(mode) && !(flags & DEL_DIR_IS_EMPTY)) {
 172                 int save_uid_ndx = uid_ndx;
 173                 /* This only happens on the first call to delete_item() since
 174                  * delete_dir_contents() always calls us w/DEL_DIR_IS_EMPTY. */
 175                 if (!uid_ndx)
 176                         uid_ndx = ++file_extra_cnt;
 177                 ignore_perishable = 1;
 178                 /* If DEL_RECURSE is not set, this just reports emptiness. */
 179                 ret = delete_dir_contents(fbuf, flags);
 180                 ignore_perishable = 0;
 181                 if (!save_uid_ndx) {
 182                         --file_extra_cnt;
 183                         uid_ndx = 0;
 184                 }
 185                 if (ret == DR_NOT_EMPTY || ret == DR_AT_LIMIT)
 186                         goto check_ret;
 187                 /* OK: try to delete the directory. */
 188         }
 189
 190         if (!(flags & DEL_MAKE_ROOM) && max_delete >= 0 && ++deletion_count > max_delete)
 191                 return DR_AT_LIMIT;
 192
 193         if (S_ISDIR(mode)) {
 194                 what = "rmdir";
 195                 ok = do_rmdir(fbuf) == 0;
 196         } else if (make_backups > 0 && (backup_dir || !is_backup_file(fbuf))) {
 197                 what = "make_backup";
 198                 ok = make_backup(fbuf);
 199         } else {
 200                 what = "unlink";
 201                 ok = robust_unlink(fbuf) == 0;
 202         }
 203
 204         if (ok) {
 205                 if (!(flags & DEL_MAKE_ROOM))
 206                         log_delete(fbuf, mode);
 207                 ret = DR_SUCCESS;
 208         } else {
 209                 if (S_ISDIR(mode) && errno == ENOTEMPTY) {
 210                         rprintf(FINFO, "cannot delete non-empty directory: %s\n",
 211                                 fbuf);
 212                         ret = DR_NOT_EMPTY;
 213                 } else if (errno != ENOENT) {
 214                         rsyserr(FERROR, errno, "delete_file: %s(%s) failed",
 215                                 what, fbuf);
 216                         ret = DR_FAILURE;
 217                 } else {
 218                         deletion_count--;
 219                         ret = DR_SUCCESS;
 220                 }
 221         }
 222
 223   check_ret:
 224         if (ret != DR_SUCCESS && flags & DEL_MAKE_ROOM) {
 225                 const char *desc;
 226                 switch (flags & DEL_MAKE_ROOM) {
 227                 case DEL_FOR_FILE: desc = "regular file"; break;
 228                 case DEL_FOR_DIR: desc = "directory"; break;
 229                 case DEL_FOR_SYMLINK: desc = "symlink"; break;
 230                 case DEL_FOR_DEVICE: desc = "device file"; break;
 231                 case DEL_FOR_SPECIAL: desc = "special file"; break;
 232                 default: exit_cleanup(RERR_UNSUPPORTED); /* IMPOSSIBLE */
 233                 }
 234                 rprintf(FERROR_XFER, "could not make way for new %s: %s\n",
 235                         desc, fbuf);
 236         }
 237         return ret;
 238 }
 239
 240 /* The directory is about to be deleted: if DEL_RECURSE is given, delete all
 241  * its contents, otherwise just checks for content.  Returns DR_SUCCESS or
 242  * DR_NOT_EMPTY.  Note that fname must point to a MAXPATHLEN buffer!  (The
 243  * buffer is used for recursion, but returned unchanged.)
 244  */
 245 static enum delret delete_dir_contents(char *fname, uint16 flags)
 246 {
 247         struct file_list *dirlist;
 248         enum delret ret;
 249         unsigned remainder;
 250         void *save_filters;
 251         int j, dlen;
 252         char *p;
 253
 254         if (verbose > 3) {
 255                 rprintf(FINFO, "delete_dir_contents(%s) flags=%d\n",
 256                         fname, flags);
 257         }
 258
 259         dlen = strlen(fname);
 260         save_filters = push_local_filters(fname, dlen);
 261
 262         non_perishable_cnt = 0;
 263         dirlist = get_dirlist(fname, dlen, 0);
 264         ret = non_perishable_cnt ? DR_NOT_EMPTY : DR_SUCCESS;
 265
 266         if (!dirlist->used)
 267                 goto done;
 268
 269         if (!(flags & DEL_RECURSE)) {
 270                 ret = DR_NOT_EMPTY;
 271                 goto done;
 272         }
 273
 274         p = fname + dlen;
 275         if (dlen != 1 || *fname != '/')
 276                 *p++ = '/';
 277         remainder = MAXPATHLEN - (p - fname);
 278
 279         /* We do our own recursion, so make delete_item() non-recursive. */
 280         flags = (flags & ~(DEL_RECURSE|DEL_MAKE_ROOM|DEL_NO_UID_WRITE))
 281               | DEL_DIR_IS_EMPTY;
 282
 283         for (j = dirlist->used; j--; ) {
 284                 struct file_struct *fp = dirlist->files[j];
 285
 286                 if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) {
 287                         if (verbose > 1) {
 288                                 rprintf(FINFO,
 289                                     "mount point, %s, pins parent directory\n",
 290                                     f_name(fp, NULL));
 291                         }
 292                         ret = DR_NOT_EMPTY;
 293                         continue;
 294                 }
 295
 296                 strlcpy(p, fp->basename, remainder);
 297                 if (!(fp->mode & S_IWUSR) && !am_root && (uid_t)F_OWNER(fp) == our_uid)
 298                         do_chmod(fname, fp->mode | S_IWUSR);
 299                 /* Save stack by recursing to ourself directly. */
 300                 if (S_ISDIR(fp->mode)) {
 301                         if (delete_dir_contents(fname, flags | DEL_RECURSE) != DR_SUCCESS)
 302                                 ret = DR_NOT_EMPTY;
 303                 }
 304                 if (delete_item(fname, fp->mode, flags) != DR_SUCCESS)
 305                         ret = DR_NOT_EMPTY;
 306         }
 307
 308         fname[dlen] = '\0';
 309
 310   done:
 311         flist_free(dirlist);
 312         pop_local_filters(save_filters);
 313
 314         if (ret == DR_NOT_EMPTY) {
 315                 rprintf(FINFO, "cannot delete non-empty directory: %s\n",
 316                         fname);
 317         }
 318         return ret;
 319 }
 320
 321 static int start_delete_delay_temp(void)
 322 {
 323         char fnametmp[MAXPATHLEN];
 324         int save_dry_run = dry_run;
 325
 326         dry_run = 0;
 327         if (!get_tmpname(fnametmp, "deldelay")
 328          || (deldelay_fd = do_mkstemp(fnametmp, 0600)) < 0) {
 329                 rprintf(FINFO, "NOTE: Unable to create delete-delay temp file%s.\n",
 330                         inc_recurse ? "" : " -- switching to --delete-after");
 331                 delete_during = 0;
 332                 delete_after = !inc_recurse;
 333                 dry_run = save_dry_run;
 334                 return 0;
 335         }
 336         unlink(fnametmp);
 337         dry_run = save_dry_run;
 338         return 1;
 339 }
 340
 341 static int flush_delete_delay(void)
 342 {
 343         if (deldelay_fd < 0 && !start_delete_delay_temp())
 344                 return 0;
 345         if (write(deldelay_fd, deldelay_buf, deldelay_cnt) != deldelay_cnt) {
 346                 rsyserr(FERROR, errno, "flush of delete-delay buffer");
 347                 delete_during = 0;
 348                 delete_after = !inc_recurse;
 349                 close(deldelay_fd);
 350                 return 0;
 351         }
 352         deldelay_cnt = 0;
 353         return 1;
 354 }
 355
 356 static int remember_delete(struct file_struct *file, const char *fname, int flags)
 357 {
 358         int len;
 359
 360         if (deldelay_cnt == deldelay_size && !flush_delete_delay())
 361                 return 0;
 362
 363         if (flags & DEL_NO_UID_WRITE)
 364                 deldelay_buf[deldelay_cnt++] = '!';
 365
 366         while (1) {
 367                 len = snprintf(deldelay_buf + deldelay_cnt,
 368                                deldelay_size - deldelay_cnt,
 369                                "%x %s%c",
 370                                (int)file->mode, fname, '\0');
 371                 if ((deldelay_cnt += len) <= deldelay_size)
 372                         break;
 373                 deldelay_cnt -= len;
 374                 if (!flush_delete_delay())
 375                         return 0;
 376         }
 377
 378         return 1;
 379 }
 380
 381 static int read_delay_line(char *buf, int *flags_p)
 382 {
 383         static int read_pos = 0;
 384         int j, len, mode;
 385         char *bp, *past_space;
 386
 387         while (1) {
 388                 for (j = read_pos; j < deldelay_cnt && deldelay_buf[j]; j++) {}
 389                 if (j < deldelay_cnt)
 390                         break;
 391                 if (deldelay_fd < 0) {
 392                         if (j > read_pos)
 393                                 goto invalid_data;
 394                         return -1;
 395                 }
 396                 deldelay_cnt -= read_pos;
 397                 if (deldelay_cnt == deldelay_size)
 398                         goto invalid_data;
 399                 if (deldelay_cnt && read_pos) {
 400                         memmove(deldelay_buf, deldelay_buf + read_pos,
 401                                 deldelay_cnt);
 402                 }
 403                 len = read(deldelay_fd, deldelay_buf + deldelay_cnt,
 404                            deldelay_size - deldelay_cnt);
 405                 if (len == 0) {
 406                         if (deldelay_cnt) {
 407                                 rprintf(FERROR,
 408                                     "ERROR: unexpected EOF in delete-delay file.\n");
 409                         }
 410                         return -1;
 411                 }
 412                 if (len < 0) {
 413                         rsyserr(FERROR, errno,
 414                                 "reading delete-delay file");
 415                         return -1;
 416                 }
 417                 deldelay_cnt += len;
 418                 read_pos = 0;
 419         }
 420
 421         bp = deldelay_buf + read_pos;
 422         if (*bp == '!') {
 423                 bp++;
 424                 *flags_p = DEL_NO_UID_WRITE;
 425         } else
 426                 *flags_p = 0;
 427
 428         if (sscanf(bp, "%x ", &mode) != 1) {
 429           invalid_data:
 430                 rprintf(FERROR, "ERROR: invalid data in delete-delay file.\n");
 431                 return -1;
 432         }
 433         past_space = strchr(bp, ' ') + 1;
 434         len = j - read_pos - (past_space - bp) + 1; /* count the '\0' */
 435         read_pos = j + 1;
 436
 437         if (len > MAXPATHLEN) {
 438                 rprintf(FERROR, "ERROR: filename too long in delete-delay file.\n");
 439                 return -1;
 440         }
 441
 442         /* The caller needs the name in a MAXPATHLEN buffer, so we copy it
 443          * instead of returning a pointer to our buffer. */
 444         memcpy(buf, past_space, len);
 445
 446         return mode;
 447 }
 448
 449 static void do_delayed_deletions(char *delbuf)
 450 {
 451         int mode, flags;
 452
 453         if (deldelay_fd >= 0) {
 454                 if (deldelay_cnt && !flush_delete_delay())
 455                         return;
 456                 lseek(deldelay_fd, 0, 0);
 457         }
 458         while ((mode = read_delay_line(delbuf, &flags)) >= 0)
 459                 delete_item(delbuf, mode, flags | DEL_RECURSE);
 460         if (deldelay_fd >= 0)
 461                 close(deldelay_fd);
 462 }
 463
 464 /* This function is used to implement per-directory deletion, and is used by
 465  * all the --delete-WHEN options.  Note that the fbuf pointer must point to a
 466  * MAXPATHLEN buffer with the name of the directory in it (the functions we
 467  * call will append names onto the end, but the old dir value will be restored
 468  * on exit). */
 469 static void delete_in_dir(char *fbuf, struct file_struct *file, dev_t *fs_dev)
 470 {
 471         static int already_warned = 0;
 472         struct file_list *dirlist;
 473         char delbuf[MAXPATHLEN];
 474         int dlen, i;
 475         int save_uid_ndx = uid_ndx;
 476
 477         if (!fbuf) {
 478                 change_local_filter_dir(NULL, 0, 0);
 479                 return;
 480         }
 481
 482         if (verbose > 2)
 483                 rprintf(FINFO, "delete_in_dir(%s)\n", fbuf);
 484
 485         if (allowed_lull)
 486                 maybe_send_keepalive();
 487
 488         if (io_error && !ignore_errors) {
 489                 if (already_warned)
 490                         return;
 491                 rprintf(FINFO,
 492                         "IO error encountered -- skipping file deletion\n");
 493                 already_warned = 1;
 494                 return;
 495         }
 496
 497         dlen = strlen(fbuf);
 498         change_local_filter_dir(fbuf, dlen, F_DEPTH(file));
 499
 500         if (one_file_system) {
 501                 if (file->flags & FLAG_TOP_DIR)
 502                         filesystem_dev = *fs_dev;
 503                 else if (filesystem_dev != *fs_dev)
 504                         return;
 505         }
 506
 507         if (!uid_ndx)
 508                 uid_ndx = ++file_extra_cnt;
 509
 510         dirlist = get_dirlist(fbuf, dlen, 0);
 511
 512         /* If an item in dirlist is not found in flist, delete it
 513          * from the filesystem. */
 514         for (i = dirlist->used; i--; ) {
 515                 struct file_struct *fp = dirlist->files[i];
 516                 if (!F_IS_ACTIVE(fp))
 517                         continue;
 518                 if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) {
 519                         if (verbose > 1)
 520                                 rprintf(FINFO, "cannot delete mount point: %s\n",
 521                                         f_name(fp, NULL));
 522                         continue;
 523                 }
 524                 if (flist_find(cur_flist, fp) < 0) {
 525                         int flags = DEL_RECURSE;
 526                         if (!(fp->mode & S_IWUSR) && !am_root && (uid_t)F_OWNER(fp) == our_uid)
 527                                 flags |= DEL_NO_UID_WRITE;
 528                         f_name(fp, delbuf);
 529                         if (delete_during == 2) {
 530                                 if (!remember_delete(fp, delbuf, flags))
 531                                         break;
 532                         } else
 533                                 delete_item(delbuf, fp->mode, flags);
 534                 }
 535         }
 536
 537         flist_free(dirlist);
 538
 539         if (!save_uid_ndx) {
 540                 --file_extra_cnt;
 541                 uid_ndx = 0;
 542         }
 543 }
 544
 545 /* This deletes any files on the receiving side that are not present on the
 546  * sending side.  This is used by --delete-before and --delete-after. */
 547 static void do_delete_pass(void)
 548 {
 549         char fbuf[MAXPATHLEN];
 550         STRUCT_STAT st;
 551         int j;
 552
 553         /* dry_run is incremented when the destination doesn't exist yet. */
 554         if (dry_run > 1 || list_only)
 555                 return;
 556
 557         for (j = 0; j < cur_flist->used; j++) {
 558                 struct file_struct *file = cur_flist->sorted[j];
 559
 560                 f_name(file, fbuf);
 561
 562                 if (!(file->flags & FLAG_CONTENT_DIR)) {
 563                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(file));
 564                         continue;
 565                 }
 566
 567                 if (verbose > 1 && file->flags & FLAG_TOP_DIR)
 568                         rprintf(FINFO, "deleting in %s\n", fbuf);
 569
 570                 if (link_stat(fbuf, &st, keep_dirlinks) < 0
 571                  || !S_ISDIR(st.st_mode))
 572                         continue;
 573
 574                 delete_in_dir(fbuf, file, &st.st_dev);
 575         }
 576         delete_in_dir(NULL, NULL, &dev_zero);
 577
 578         if (do_progress && !am_server)
 579                 rprintf(FINFO, "                    \r");
 580 }
 581
 582 int unchanged_attrs(const char *fname, struct file_struct *file, stat_x *sxp)
 583 {
 584 #if !defined HAVE_LUTIMES || !defined HAVE_UTIMES
 585         if (S_ISLNK(file->mode)) {
 586                 ;
 587         } else
 588 #endif
 589         if (preserve_times && cmp_time(sxp->st.st_mtime, file->modtime) != 0)
 590                 return 0;
 591
 592         if (preserve_perms) {
 593                 if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
 594                         return 0;
 595         } else if (preserve_executability
 596          && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
 597                 return 0;
 598
 599         if (am_root && uid_ndx && sxp->st.st_uid != (uid_t)F_OWNER(file))
 600                 return 0;
 601
 602         if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP) && sxp->st.st_gid != (gid_t)F_GROUP(file))
 603                 return 0;
 604
 605 #ifdef SUPPORT_ACLS
 606         if (preserve_acls && !S_ISLNK(file->mode)) {
 607                 if (!ACL_READY(*sxp))
 608                         get_acl(fname, sxp);
 609                 if (set_acl(NULL, file, sxp) == 0)
 610                         return 0;
 611         }
 612 #endif
 613 #ifdef SUPPORT_XATTRS
 614         if (preserve_xattrs) {
 615                 if (!XATTR_READY(*sxp))
 616                         get_xattr(fname, sxp);
 617                 if (xattr_diff(file, sxp, 0))
 618                         return 0;
 619         }
 620 #endif
 621
 622         return 1;
 623 }
 624
 625 void itemize(const char *fnamecmp, struct file_struct *file, int ndx, int statret,
 626              stat_x *sxp, int32 iflags, uchar fnamecmp_type,
 627              const char *xname)
 628 {
 629         if (statret >= 0) { /* A from-dest-dir statret can == 1! */
 630                 int keep_time = !preserve_times ? 0
 631                     : S_ISDIR(file->mode) ? preserve_times > 1 :
 632 #if defined HAVE_LUTIMES && defined HAVE_UTIMES
 633                     1;
 634 #else
 635                     !S_ISLNK(file->mode);
 636 #endif
 637
 638                 if (S_ISREG(file->mode) && F_LENGTH(file) != sxp->st.st_size)
 639                         iflags |= ITEM_REPORT_SIZE;
 640                 if (file->flags & FLAG_TIME_FAILED) { /* symlinks only */
 641                         if (iflags & ITEM_LOCAL_CHANGE)
 642                                 iflags |= symlink_timeset_failed_flags;
 643                 } else if (keep_time
 644                  ? cmp_time(file->modtime, sxp->st.st_mtime) != 0
 645                  : iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !(iflags & ITEM_MATCHED)
 646                   && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
 647                         iflags |= ITEM_REPORT_TIME;
 648 #if !defined HAVE_LCHMOD && !defined HAVE_SETATTRLIST
 649                 if (S_ISLNK(file->mode)) {
 650                         ;
 651                 } else
 652 #endif
 653                 if (preserve_perms) {
 654                         if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
 655                                 iflags |= ITEM_REPORT_PERMS;
 656                 } else if (preserve_executability
 657                  && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
 658                         iflags |= ITEM_REPORT_PERMS;
 659                 if (uid_ndx && am_root && (uid_t)F_OWNER(file) != sxp->st.st_uid)
 660                         iflags |= ITEM_REPORT_OWNER;
 661                 if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP)
 662                     && sxp->st.st_gid != (gid_t)F_GROUP(file))
 663                         iflags |= ITEM_REPORT_GROUP;
 664 #ifdef SUPPORT_ACLS
 665                 if (preserve_acls && !S_ISLNK(file->mode)) {
 666                         if (!ACL_READY(*sxp))
 667                                 get_acl(fnamecmp, sxp);
 668                         if (set_acl(NULL, file, sxp) == 0)
 669                                 iflags |= ITEM_REPORT_ACL;
 670                 }
 671 #endif
 672 #ifdef SUPPORT_XATTRS
 673                 if (preserve_xattrs) {
 674                         if (!XATTR_READY(*sxp))
 675                                 get_xattr(fnamecmp, sxp);
 676                         if (xattr_diff(file, sxp, 1))
 677                                 iflags |= ITEM_REPORT_XATTR;
 678                 }
 679 #endif
 680         } else {
 681 #ifdef SUPPORT_XATTRS
 682                 if (preserve_xattrs && xattr_diff(file, NULL, 1))
 683                         iflags |= ITEM_REPORT_XATTR;
 684 #endif
 685                 iflags |= ITEM_IS_NEW;
 686         }
 687
 688         iflags &= 0xffff;
 689         if ((iflags & (SIGNIFICANT_ITEM_FLAGS|ITEM_REPORT_XATTR) || verbose > 1
 690           || stdout_format_has_i > 1 || (xname && *xname)) && !read_batch) {
 691                 if (protocol_version >= 29) {
 692                         if (ndx >= 0)
 693                                 write_ndx(sock_f_out, ndx);
 694                         write_shortint(sock_f_out, iflags);
 695                         if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
 696                                 write_byte(sock_f_out, fnamecmp_type);
 697                         if (iflags & ITEM_XNAME_FOLLOWS)
 698                                 write_vstring(sock_f_out, xname, strlen(xname));
 699 #ifdef SUPPORT_XATTRS
 700                         if (iflags & ITEM_REPORT_XATTR && !dry_run)
 701                                 send_xattr_request(NULL, file, sock_f_out);
 702 #endif
 703                 } else if (ndx >= 0) {
 704                         enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
 705                         log_item(code, file, &stats, iflags, xname);
 706                 }
 707         }
 708 }
 709
 710
 711 /* Perform our quick-check heuristic for determining if a file is unchanged. */
 712 int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
 713 {
 714         if (st->st_size != F_LENGTH(file))
 715                 return 0;
 716
 717         /* if always checksum is set then we use the checksum instead
 718            of the file time to determine whether to sync */
 719         if (always_checksum > 0 && S_ISREG(st->st_mode)) {
 720                 char sum[MAX_DIGEST_LEN];
 721                 file_checksum(fn, sum, st->st_size);
 722                 return memcmp(sum, F_SUM(file), checksum_len) == 0;
 723         }
 724
 725         if (size_only > 0)
 726                 return 1;
 727
 728         if (ignore_times)
 729                 return 0;
 730
 731         return cmp_time(st->st_mtime, file->modtime) == 0;
 732 }
 733
 734
 735 /*
 736  * set (initialize) the size entries in the per-file sum_struct
 737  * calculating dynamic block and checksum sizes.
 738  *
 739  * This is only called from generate_and_send_sums() but is a separate
 740  * function to encapsulate the logic.
 741  *
 742  * The block size is a rounded square root of file length.
 743  *
 744  * The checksum size is determined according to:
 745  *     blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
 746  * provided by Donovan Baarda which gives a probability of rsync
 747  * algorithm corrupting data and falling back using the whole md4
 748  * checksums.
 749  *
 750  * This might be made one of several selectable heuristics.
 751  */
 752 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
 753 {
 754         int32 blength;
 755         int s2length;
 756
 757         if (block_size)
 758                 blength = block_size;
 759         else if (len <= BLOCK_SIZE * BLOCK_SIZE)
 760                 blength = BLOCK_SIZE;
 761         else {
 762                 int32 c;
 763                 int64 l;
 764                 int cnt;
 765                 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
 766                 if (cnt >= 31 || c >= MAX_BLOCK_SIZE)
 767                         blength = MAX_BLOCK_SIZE;
 768                 else {
 769                     blength = 0;
 770                     do {
 771                             blength |= c;
 772                             if (len < (int64)blength * blength)
 773                                     blength &= ~c;
 774                             c >>= 1;
 775                     } while (c >= 8);   /* round to multiple of 8 */
 776                     blength = MAX(blength, BLOCK_SIZE);
 777                 }
 778         }
 779
 780         if (protocol_version < 27) {
 781                 s2length = csum_length;
 782         } else if (csum_length == SUM_LENGTH) {
 783                 s2length = SUM_LENGTH;
 784         } else {
 785                 int32 c;
 786                 int64 l;
 787                 int b = BLOCKSUM_BIAS;
 788                 for (l = len; l >>= 1; b += 2) {}
 789                 for (c = blength; (c >>= 1) && b; b--) {}
 790                 /* add a bit, subtract rollsum, round up. */
 791                 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
 792                 s2length = MAX(s2length, csum_length);
 793                 s2length = MIN(s2length, SUM_LENGTH);
 794         }
 795
 796         sum->flength    = len;
 797         sum->blength    = blength;
 798         sum->s2length   = s2length;
 799         sum->remainder  = (int32)(len % blength);
 800         sum->count      = (int32)(len / blength) + (sum->remainder != 0);
 801
 802         if (sum->count && verbose > 2) {
 803                 rprintf(FINFO,
 804                         "count=%.0f rem=%ld blength=%ld s2length=%d flength=%.0f\n",
 805                         (double)sum->count, (long)sum->remainder, (long)sum->blength,
 806                         sum->s2length, (double)sum->flength);
 807         }
 808 }
 809
 810
 811 /*
 812  * Generate and send a stream of signatures/checksums that describe a buffer
 813  *
 814  * Generate approximately one checksum every block_len bytes.
 815  */
 816 static void generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
 817 {
 818         int32 i;
 819         struct map_struct *mapbuf;
 820         struct sum_struct sum;
 821         OFF_T offset = 0;
 822
 823         sum_sizes_sqroot(&sum, len);
 824         write_sum_head(f_out, &sum);
 825
 826         if (append_mode > 0 && f_copy < 0)
 827                 return;
 828
 829         if (len > 0)
 830                 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
 831         else
 832                 mapbuf = NULL;
 833
 834         for (i = 0; i < sum.count; i++) {
 835                 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
 836                 char *map = map_ptr(mapbuf, offset, n1);
 837                 char sum2[SUM_LENGTH];
 838                 uint32 sum1;
 839
 840                 len -= n1;
 841                 offset += n1;
 842
 843                 if (f_copy >= 0) {
 844                         full_write(f_copy, map, n1);
 845                         if (append_mode > 0)
 846                                 continue;
 847                 }
 848
 849                 sum1 = get_checksum1(map, n1);
 850                 get_checksum2(map, n1, sum2);
 851
 852                 if (verbose > 3) {
 853                         rprintf(FINFO,
 854                                 "chunk[%.0f] offset=%.0f len=%ld sum1=%08lx\n",
 855                                 (double)i, (double)offset - n1, (long)n1,
 856                                 (unsigned long)sum1);
 857                 }
 858                 write_int(f_out, sum1);
 859                 write_buf(f_out, sum2, sum.s2length);
 860         }
 861
 862         if (mapbuf)
 863                 unmap_file(mapbuf);
 864 }
 865
 866
 867 /* Try to find a filename in the same dir as "fname" with a similar name. */
 868 static int find_fuzzy(struct file_struct *file, struct file_list *dirlist)
 869 {
 870         int fname_len, fname_suf_len;
 871         const char *fname_suf, *fname = file->basename;
 872         uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
 873         int j, lowest_j = -1;
 874
 875         fname_len = strlen(fname);
 876         fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
 877
 878         for (j = 0; j < dirlist->used; j++) {
 879                 struct file_struct *fp = dirlist->files[j];
 880                 const char *suf, *name;
 881                 int len, suf_len;
 882                 uint32 dist;
 883
 884                 if (!S_ISREG(fp->mode) || !F_LENGTH(fp)
 885                  || fp->flags & FLAG_FILE_SENT)
 886                         continue;
 887
 888                 name = fp->basename;
 889
 890                 if (F_LENGTH(fp) == F_LENGTH(file)
 891                     && cmp_time(fp->modtime, file->modtime) == 0) {
 892                         if (verbose > 4) {
 893                                 rprintf(FINFO,
 894                                         "fuzzy size/modtime match for %s\n",
 895                                         name);
 896                         }
 897                         return j;
 898                 }
 899
 900                 len = strlen(name);
 901                 suf = find_filename_suffix(name, len, &suf_len);
 902
 903                 dist = fuzzy_distance(name, len, fname, fname_len);
 904                 /* Add some extra weight to how well the suffixes match. */
 905                 dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len)
 906                       * 10;
 907                 if (verbose > 4) {
 908                         rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
 909                                 name, (int)(dist>>16), (int)(dist&0xFFFF));
 910                 }
 911                 if (dist <= lowest_dist) {
 912                         lowest_dist = dist;
 913                         lowest_j = j;
 914                 }
 915         }
 916
 917         return lowest_j;
 918 }
 919
 920 /* Copy a file found in our --copy-dest handling. */
 921 static int copy_altdest_file(const char *src, const char *dest, struct file_struct *file)
 922 {
 923         char buf[MAXPATHLEN];
 924         const char *copy_to, *partialptr;
 925         int save_preserve_xattrs = preserve_xattrs;
 926         int ok, fd_w;
 927
 928         if (inplace) {
 929                 /* Let copy_file open the destination in place. */
 930                 fd_w = -1;
 931                 copy_to = dest;
 932         } else {
 933                 fd_w = open_tmpfile(buf, dest, file);
 934                 if (fd_w < 0)
 935                         return -1;
 936                 copy_to = buf;
 937         }
 938         cleanup_set(copy_to, NULL, NULL, -1, -1);
 939         if (copy_file(src, copy_to, fd_w, file->mode, 0) < 0) {
 940                 if (verbose) {
 941                         rsyserr(FINFO, errno, "copy_file %s => %s",
 942                                 full_fname(src), copy_to);
 943                 }
 944                 /* Try to clean up. */
 945                 unlink(copy_to);
 946                 cleanup_disable();
 947                 return -1;
 948         }
 949         partialptr = partial_dir ? partial_dir_fname(dest) : NULL;
 950         preserve_xattrs = 0; /* xattrs were copied with file */
 951         ok = finish_transfer(dest, copy_to, src, partialptr, file, 1, 0);
 952         preserve_xattrs = save_preserve_xattrs;
 953         cleanup_disable();
 954         return ok ? 0 : -1;
 955 }
 956
 957 /* This is only called for regular files.  We return -2 if we've finished
 958  * handling the file, -1 if no dest-linking occurred, or a non-negative
 959  * value if we found an alternate basis file. */
 960 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
 961                          char *cmpbuf, stat_x *sxp, int itemizing,
 962                          enum logcode code)
 963 {
 964         int best_match = -1;
 965         int match_level = 0;
 966         int j = 0;
 967
 968         do {
 969                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 970                 if (link_stat(cmpbuf, &sxp->st, 0) < 0 || !S_ISREG(sxp->st.st_mode))
 971                         continue;
 972                 switch (match_level) {
 973                 case 0:
 974                         best_match = j;
 975                         match_level = 1;
 976                         /* FALL THROUGH */
 977                 case 1:
 978                         if (!unchanged_file(cmpbuf, file, &sxp->st))
 979                                 continue;
 980                         best_match = j;
 981                         match_level = 2;
 982                         /* FALL THROUGH */
 983                 case 2:
 984                         if (!unchanged_attrs(cmpbuf, file, sxp))
 985                                 continue;
 986                         best_match = j;
 987                         match_level = 3;
 988                         break;
 989                 }
 990                 break;
 991         } while (basis_dir[++j] != NULL);
 992
 993         if (!match_level)
 994                 return -1;
 995
 996         if (j != best_match) {
 997                 j = best_match;
 998                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 999                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1000                         return -1;
1001         }
1002
1003         if (match_level == 3 && !copy_dest) {
1004 #ifdef SUPPORT_HARD_LINKS
1005                 if (link_dest) {
1006                         if (!hard_link_one(file, fname, cmpbuf, 1))
1007                                 goto try_a_copy;
1008                         if (preserve_hard_links && F_IS_HLINKED(file))
1009                                 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, j);
1010                         if (!maybe_ATTRS_REPORT && (verbose > 1 || stdout_format_has_i > 1)) {
1011                                 itemize(cmpbuf, file, ndx, 1, sxp,
1012                                         ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS,
1013                                         0, "");
1014                         }
1015                 } else
1016 #endif
1017                 if (itemizing)
1018                         itemize(cmpbuf, file, ndx, 0, sxp, 0, 0, NULL);
1019                 if (verbose > 1 && maybe_ATTRS_REPORT)
1020                         rprintf(FCLIENT, "%s is uptodate\n", fname);
1021                 return -2;
1022         }
1023
1024         if (match_level >= 2) {
1025 #ifdef SUPPORT_HARD_LINKS
1026           try_a_copy: /* Copy the file locally. */
1027 #endif
1028                 if (!dry_run && copy_altdest_file(cmpbuf, fname, file) < 0)
1029                         return -1;
1030                 if (itemizing)
1031                         itemize(cmpbuf, file, ndx, 0, sxp, ITEM_LOCAL_CHANGE, 0, NULL);
1032                 if (maybe_ATTRS_REPORT
1033                  && ((!itemizing && verbose && match_level == 2)
1034                   || (verbose > 1 && match_level == 3))) {
1035                         code = match_level == 3 ? FCLIENT : FINFO;
1036                         rprintf(code, "%s%s\n", fname,
1037                                 match_level == 3 ? " is uptodate" : "");
1038                 }
1039 #ifdef SUPPORT_HARD_LINKS
1040                 if (preserve_hard_links && F_IS_HLINKED(file))
1041                         finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, -1);
1042 #endif
1043                 return -2;
1044         }
1045
1046         return FNAMECMP_BASIS_DIR_LOW + j;
1047 }
1048
1049 /* This is only called for non-regular files.  We return -2 if we've finished
1050  * handling the file, or -1 if no dest-linking occurred, or a non-negative
1051  * value if we found an alternate basis file. */
1052 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
1053                          char *cmpbuf, stat_x *sxp, int itemizing,
1054                          enum logcode code)
1055 {
1056         char lnk[MAXPATHLEN];
1057         int best_match = -1;
1058         int match_level = 0;
1059         enum nonregtype type;
1060         uint32 *devp;
1061         int len, j = 0;
1062
1063 #ifndef SUPPORT_LINKS
1064         if (S_ISLNK(file->mode))
1065                 return -1;
1066 #endif
1067         if (S_ISDIR(file->mode)) {
1068                 type = TYPE_DIR;
1069         } else if (IS_SPECIAL(file->mode))
1070                 type = TYPE_SPECIAL;
1071         else if (IS_DEVICE(file->mode))
1072                 type = TYPE_DEVICE;
1073 #ifdef SUPPORT_LINKS
1074         else if (S_ISLNK(file->mode))
1075                 type = TYPE_SYMLINK;
1076 #endif
1077         else {
1078                 rprintf(FERROR,
1079                         "internal: try_dests_non() called with invalid mode (%o)\n",
1080                         (int)file->mode);
1081                 exit_cleanup(RERR_UNSUPPORTED);
1082         }
1083
1084         do {
1085                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1086                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1087                         continue;
1088                 switch (type) {
1089                 case TYPE_DIR:
1090                         if (!S_ISDIR(sxp->st.st_mode))
1091                                 continue;
1092                         break;
1093                 case TYPE_SPECIAL:
1094                         if (!IS_SPECIAL(sxp->st.st_mode))
1095                                 continue;
1096                         break;
1097                 case TYPE_DEVICE:
1098                         if (!IS_DEVICE(sxp->st.st_mode))
1099                                 continue;
1100                         break;
1101 #ifdef SUPPORT_LINKS
1102                 case TYPE_SYMLINK:
1103                         if (!S_ISLNK(sxp->st.st_mode))
1104                                 continue;
1105                         break;
1106 #endif
1107                 }
1108                 if (match_level < 1) {
1109                         match_level = 1;
1110                         best_match = j;
1111                 }
1112                 switch (type) {
1113                 case TYPE_DIR:
1114                         break;
1115                 case TYPE_SPECIAL:
1116                 case TYPE_DEVICE:
1117                         devp = F_RDEV_P(file);
1118                         if (sxp->st.st_rdev != MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)))
1119                                 continue;
1120                         break;
1121 #ifdef SUPPORT_LINKS
1122                 case TYPE_SYMLINK:
1123                         if ((len = readlink(cmpbuf, lnk, MAXPATHLEN-1)) <= 0)
1124                                 continue;
1125                         lnk[len] = '\0';
1126                         if (strcmp(lnk, F_SYMLINK(file)) != 0)
1127                                 continue;
1128                         break;
1129 #endif
1130                 }
1131                 if (match_level < 2) {
1132                         match_level = 2;
1133                         best_match = j;
1134                 }
1135                 if (unchanged_attrs(cmpbuf, file, sxp)) {
1136                         match_level = 3;
1137                         best_match = j;
1138                         break;
1139                 }
1140         } while (basis_dir[++j] != NULL);
1141
1142         if (!match_level)
1143                 return -1;
1144
1145         if (j != best_match) {
1146                 j = best_match;
1147                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1148                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1149                         return -1;
1150         }
1151
1152         if (match_level == 3) {
1153 #ifdef SUPPORT_HARD_LINKS
1154                 if (link_dest
1155 #ifndef CAN_HARDLINK_SYMLINK
1156                  && !S_ISLNK(file->mode)
1157 #endif
1158 #ifndef CAN_HARDLINK_SPECIAL
1159                  && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
1160 #endif
1161                  && !S_ISDIR(file->mode)) {
1162                         if (do_link(cmpbuf, fname) < 0) {
1163                                 rsyserr(FERROR_XFER, errno,
1164                                         "failed to hard-link %s with %s",
1165                                         cmpbuf, fname);
1166                                 return j;
1167                         }
1168                         if (preserve_hard_links && F_IS_HLINKED(file))
1169                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1170                 } else
1171 #endif
1172                         match_level = 2;
1173                 if (itemizing && stdout_format_has_i
1174                  && (verbose > 1 || stdout_format_has_i > 1)) {
1175                         int chg = compare_dest && type != TYPE_DIR ? 0
1176                             : ITEM_LOCAL_CHANGE + (match_level == 3 ? ITEM_XNAME_FOLLOWS : 0);
1177                         char *lp = match_level == 3 ? "" : NULL;
1178                         itemize(cmpbuf, file, ndx, 0, sxp, chg + ITEM_MATCHED, 0, lp);
1179                 }
1180                 if (verbose > 1 && maybe_ATTRS_REPORT) {
1181                         rprintf(FCLIENT, "%s%s is uptodate\n",
1182                                 fname, type == TYPE_DIR ? "/" : "");
1183                 }
1184                 return -2;
1185         }
1186
1187         return j;
1188 }
1189
1190 static void list_file_entry(struct file_struct *f)
1191 {
1192         char permbuf[PERMSTRING_SIZE];
1193         double len;
1194
1195         if (!F_IS_ACTIVE(f)) {
1196                 /* this can happen if duplicate names were removed */
1197                 return;
1198         }
1199
1200         permstring(permbuf, f->mode);
1201         len = F_LENGTH(f);
1202
1203         /* TODO: indicate '+' if the entry has an ACL. */
1204
1205 #ifdef SUPPORT_LINKS
1206         if (preserve_links && S_ISLNK(f->mode)) {
1207                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
1208                         permbuf, len, timestring(f->modtime),
1209                         f_name(f, NULL), F_SYMLINK(f));
1210         } else
1211 #endif
1212         {
1213                 rprintf(FINFO, "%s %11.0f %s %s\n",
1214                         permbuf, len, timestring(f->modtime),
1215                         f_name(f, NULL));
1216         }
1217 }
1218
1219 static int phase = 0;
1220 static int dflt_perms;
1221
1222 static int implied_dirs_are_missing;
1223 /* Helper for recv_generator's skip_dir and dry_missing_dir tests. */
1224 static BOOL is_below(struct file_struct *file, struct file_struct *subtree)
1225 {
1226         return F_DEPTH(file) > F_DEPTH(subtree)
1227                 && (!implied_dirs_are_missing || f_name_has_prefix(file, subtree));
1228 }
1229
1230 /* Acts on the indicated item in cur_flist whose name is fname.  If a dir,
1231  * make sure it exists, and has the right permissions/timestamp info.  For
1232  * all other non-regular files (symlinks, etc.) we create them here.  For
1233  * regular files that have changed, we try to find a basis file and then
1234  * start sending checksums.  The ndx is the file's unique index value.
1235  *
1236  * The fname parameter must point to a MAXPATHLEN buffer!  (e.g it gets
1237  * passed to delete_item(), which can use it during a recursive delete.)
1238  *
1239  * Note that f_out is set to -1 when doing final directory-permission and
1240  * modification-time repair. */
1241 static void recv_generator(char *fname, struct file_struct *file, int ndx,
1242                            int itemizing, enum logcode code, int f_out)
1243 {
1244         static const char *parent_dirname = "";
1245         /* Missing dir not created due to --dry-run; will still be scanned. */
1246         static struct file_struct *dry_missing_dir = NULL;
1247         /* Missing dir whose contents are skipped altogether due to
1248          * --ignore-non-existing, daemon exclude, or mkdir failure. */
1249         static struct file_struct *skip_dir = NULL;
1250         static struct file_list *fuzzy_dirlist = NULL;
1251         static int need_fuzzy_dirlist = 0;
1252         struct file_struct *fuzzy_file = NULL;
1253         int fd = -1, f_copy = -1;
1254         stat_x sx, real_sx;
1255         STRUCT_STAT partial_st;
1256         struct file_struct *back_file = NULL;
1257         int statret, real_ret, stat_errno;
1258         char *fnamecmp, *partialptr, *backupptr = NULL;
1259         char fnamecmpbuf[MAXPATHLEN];
1260         uchar fnamecmp_type;
1261         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1262         int is_dir = !S_ISDIR(file->mode) ? 0
1263                    : inc_recurse && ndx != cur_flist->ndx_start - 1 ? -1
1264                    : 1;
1265
1266         if (verbose > 2)
1267                 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
1268
1269         if (list_only) {
1270                 if (is_dir < 0
1271                  || (is_dir && !implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1272                         return;
1273                 list_file_entry(file);
1274                 return;
1275         }
1276
1277         if (skip_dir) {
1278                 if (is_below(file, skip_dir)) {
1279                         if (is_dir)
1280                                 file->flags |= FLAG_MISSING_DIR;
1281 #ifdef SUPPORT_HARD_LINKS
1282                         else if (F_IS_HLINKED(file))
1283                                 handle_skipped_hlink(file, itemizing, code, f_out);
1284 #endif
1285                         return;
1286                 }
1287                 skip_dir = NULL;
1288         }
1289
1290         if (daemon_filter_list.head && (*fname != '.' || fname[1])) {
1291                 if (check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
1292                         if (is_dir < 0)
1293                                 return;
1294 #ifdef SUPPORT_HARD_LINKS
1295                         if (F_IS_HLINKED(file))
1296                                 handle_skipped_hlink(file, itemizing, code, f_out);
1297 #endif
1298                         rprintf(FERROR_XFER,
1299                                 "skipping daemon-excluded %s \"%s\"\n",
1300                                 is_dir ? "directory" : "file", fname);
1301                         if (is_dir)
1302                                 goto skipping_dir_contents;
1303                         return;
1304                 }
1305         }
1306
1307 #ifdef SUPPORT_ACLS
1308         sx.acc_acl = sx.def_acl = NULL;
1309 #endif
1310 #ifdef SUPPORT_XATTRS
1311         sx.xattr = NULL;
1312 #endif
1313         if (dry_run > 1 || (dry_missing_dir && is_below(file, dry_missing_dir))) {
1314           parent_is_dry_missing:
1315                 if (fuzzy_dirlist) {
1316                         flist_free(fuzzy_dirlist);
1317                         fuzzy_dirlist = NULL;
1318                 }
1319                 parent_dirname = "";
1320                 statret = -1;
1321                 stat_errno = ENOENT;
1322         } else {
1323                 const char *dn = file->dirname ? file->dirname : ".";
1324                 dry_missing_dir = NULL;
1325                 if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
1326                         if (relative_paths && !implied_dirs
1327                          && do_stat(dn, &sx.st) < 0) {
1328                                 if (dry_run)
1329                                         goto parent_is_dry_missing;
1330                                 if (create_directory_path(fname) < 0) {
1331                                         rsyserr(FERROR_XFER, errno,
1332                                                 "recv_generator: mkdir %s failed",
1333                                                 full_fname(dn));
1334                                 }
1335                         }
1336                         if (fuzzy_dirlist) {
1337                                 flist_free(fuzzy_dirlist);
1338                                 fuzzy_dirlist = NULL;
1339                         }
1340                         if (fuzzy_basis)
1341                                 need_fuzzy_dirlist = 1;
1342 #ifdef SUPPORT_ACLS
1343                         if (!preserve_perms)
1344                                 dflt_perms = default_perms_for_dir(dn);
1345 #endif
1346                 }
1347                 parent_dirname = dn;
1348
1349                 if (need_fuzzy_dirlist && S_ISREG(file->mode)) {
1350                         strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf);
1351                         fuzzy_dirlist = get_dirlist(fnamecmpbuf, -1, 1);
1352                         need_fuzzy_dirlist = 0;
1353                 }
1354
1355                 statret = link_stat(fname, &sx.st, keep_dirlinks && is_dir);
1356                 stat_errno = errno;
1357         }
1358
1359         if (ignore_non_existing > 0 && statret == -1 && stat_errno == ENOENT) {
1360                 if (is_dir) {
1361                         if (is_dir < 0)
1362                                 return;
1363                         skip_dir = file;
1364                         file->flags |= FLAG_MISSING_DIR;
1365                 }
1366 #ifdef SUPPORT_HARD_LINKS
1367                 else if (F_IS_HLINKED(file))
1368                         handle_skipped_hlink(file, itemizing, code, f_out);
1369 #endif
1370                 if (verbose > 1) {
1371                         rprintf(FINFO, "not creating new %s \"%s\"\n",
1372                                 is_dir ? "directory" : "file", fname);
1373                 }
1374                 return;
1375         }
1376
1377         if (statret == 0 && !(sx.st.st_mode & S_IWUSR)
1378          && !am_root && sx.st.st_uid == our_uid)
1379                 del_opts |= DEL_NO_UID_WRITE;
1380
1381         if (ignore_existing > 0 && statret == 0
1382          && (!is_dir || !S_ISDIR(sx.st.st_mode))) {
1383                 if (verbose > 1 && is_dir >= 0)
1384                         rprintf(FINFO, "%s exists\n", fname);
1385 #ifdef SUPPORT_HARD_LINKS
1386                 if (F_IS_HLINKED(file))
1387                         handle_skipped_hlink(file, itemizing, code, f_out);
1388 #endif
1389                 goto cleanup;
1390         }
1391
1392         if (is_dir) {
1393                 if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
1394                         goto cleanup;
1395                 if (is_dir < 0) {
1396                         /* In inc_recurse mode we want to make sure any missing
1397                          * directories get created while we're still processing
1398                          * the parent dir (which allows us to touch the parent
1399                          * dir's mtime right away).  We will handle the dir in
1400                          * full later (right before we handle its contents). */
1401                         if (statret == 0
1402                          && (S_ISDIR(sx.st.st_mode)
1403                           || delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0))
1404                                 goto cleanup; /* Any errors get reported later. */
1405                         if (do_mkdir(fname, file->mode & 0700) == 0)
1406                                 file->flags |= FLAG_DIR_CREATED;
1407                         goto cleanup;
1408                 }
1409                 /* The file to be received is a directory, so we need
1410                  * to prepare appropriately.  If there is already a
1411                  * file of that name and it is *not* a directory, then
1412                  * we need to delete it.  If it doesn't exist, then
1413                  * (perhaps recursively) create it. */
1414                 if (statret == 0 && !S_ISDIR(sx.st.st_mode)) {
1415                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0)
1416                                 goto skipping_dir_contents;
1417                         statret = -1;
1418                 }
1419                 if (dry_run && statret != 0) {
1420                         if (!dry_missing_dir)
1421                                 dry_missing_dir = file;
1422                         file->flags |= FLAG_MISSING_DIR;
1423                 }
1424                 real_ret = statret;
1425                 real_sx = sx;
1426                 if (file->flags & FLAG_DIR_CREATED)
1427                         statret = -1;
1428                 if (!preserve_perms) { /* See comment in non-dir code below. */
1429                         file->mode = dest_mode(file->mode, sx.st.st_mode,
1430                                                dflt_perms, statret == 0);
1431                 }
1432                 if (statret != 0 && basis_dir[0] != NULL) {
1433                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1434                                               itemizing, code);
1435                         if (j == -2) {
1436                                 itemizing = 0;
1437                                 code = FNONE;
1438                         } else if (j >= 0)
1439                                 statret = 1;
1440                 }
1441                 if (itemizing && f_out != -1) {
1442                         itemize(fname, file, ndx, statret, &sx,
1443                                 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
1444                 }
1445                 if (real_ret != 0 && do_mkdir(fname,file->mode) < 0 && errno != EEXIST) {
1446                         if (!relative_paths || errno != ENOENT
1447                             || create_directory_path(fname) < 0
1448                             || (do_mkdir(fname, file->mode) < 0 && errno != EEXIST)) {
1449                                 rsyserr(FERROR_XFER, errno,
1450                                         "recv_generator: mkdir %s failed",
1451                                         full_fname(fname));
1452                           skipping_dir_contents:
1453                                 rprintf(FERROR,
1454                                     "*** Skipping any contents from this failed directory ***\n");
1455                                 skip_dir = file;
1456                                 file->flags |= FLAG_MISSING_DIR;
1457                                 goto cleanup;
1458                         }
1459                 }
1460                 if (set_file_attrs(fname, file, real_ret ? NULL : &real_sx, NULL, 0)
1461                     && verbose && code != FNONE && f_out != -1)
1462                         rprintf(code, "%s/\n", fname);
1463
1464                 /* We need to ensure that the dirs in the transfer have writable
1465                  * permissions during the time we are putting files within them.
1466                  * This is then fixed after the transfer is done. */
1467 #ifdef HAVE_CHMOD
1468                 if (!am_root && !(file->mode & S_IWUSR) && dir_tweaking) {
1469                         mode_t mode = file->mode | S_IWUSR;
1470                         if (do_chmod(fname, mode) < 0) {
1471                                 rsyserr(FERROR_XFER, errno,
1472                                         "failed to modify permissions on %s",
1473                                         full_fname(fname));
1474                         }
1475                         need_retouch_dir_perms = 1;
1476                 }
1477 #endif
1478
1479                 if (real_ret != 0 && one_file_system)
1480                         real_sx.st.st_dev = filesystem_dev;
1481                 if (inc_recurse) {
1482                         if (one_file_system) {
1483                                 uint32 *devp = F_DIR_DEV_P(file);
1484                                 DEV_MAJOR(devp) = major(real_sx.st.st_dev);
1485                                 DEV_MINOR(devp) = minor(real_sx.st.st_dev);
1486                         }
1487                 }
1488                 else if (delete_during && f_out != -1 && !phase
1489                     && !(file->flags & FLAG_MISSING_DIR)) {
1490                         if (file->flags & FLAG_CONTENT_DIR)
1491                                 delete_in_dir(fname, file, &real_sx.st.st_dev);
1492                         else
1493                                 change_local_filter_dir(fname, strlen(fname), F_DEPTH(file));
1494                 }
1495                 goto cleanup;
1496         }
1497
1498         /* If we're not preserving permissions, change the file-list's
1499          * mode based on the local permissions and some heuristics. */
1500         if (!preserve_perms) {
1501                 int exists = statret == 0 && !S_ISDIR(sx.st.st_mode);
1502                 file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms,
1503                                        exists);
1504         }
1505
1506 #ifdef SUPPORT_HARD_LINKS
1507         if (preserve_hard_links && F_HLINK_NOT_FIRST(file)
1508          && hard_link_check(file, ndx, fname, statret, &sx, itemizing, code))
1509                 goto cleanup;
1510 #endif
1511
1512         if (preserve_links && S_ISLNK(file->mode)) {
1513 #ifdef SUPPORT_LINKS
1514                 const char *sl = F_SYMLINK(file);
1515                 if (safe_symlinks && unsafe_symlink(sl, fname)) {
1516                         if (verbose) {
1517                                 if (solo_file)
1518                                         fname = f_name(file, NULL);
1519                                 rprintf(FINFO,
1520                                         "ignoring unsafe symlink %s -> \"%s\"\n",
1521                                         full_fname(fname), sl);
1522                         }
1523                         return;
1524                 }
1525                 if (statret == 0) {
1526                         char lnk[MAXPATHLEN];
1527                         int len;
1528
1529                         if (!S_ISLNK(sx.st.st_mode))
1530                                 statret = -1;
1531                         else if ((len = readlink(fname, lnk, MAXPATHLEN-1)) > 0
1532                               && strncmp(lnk, sl, len) == 0 && sl[len] == '\0') {
1533                                 /* The link is pointing to the right place. */
1534                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1535                                 if (itemizing)
1536                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1537 #if defined SUPPORT_HARD_LINKS && defined CAN_HARDLINK_SYMLINK
1538                                 if (preserve_hard_links && F_IS_HLINKED(file))
1539                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1540 #endif
1541                                 if (remove_source_files == 1)
1542                                         goto return_with_success;
1543                                 goto cleanup;
1544                         }
1545                         /* Not the right symlink (or not a symlink), so
1546                          * delete it. */
1547                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_SYMLINK) != 0)
1548                                 goto cleanup;
1549                 } else if (basis_dir[0] != NULL) {
1550                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1551                                               itemizing, code);
1552                         if (j == -2) {
1553 #ifndef CAN_HARDLINK_SYMLINK
1554                                 if (link_dest) {
1555                                         /* Resort to --copy-dest behavior. */
1556                                 } else
1557 #endif
1558                                 if (!copy_dest)
1559                                         goto cleanup;
1560                                 itemizing = 0;
1561                                 code = FNONE;
1562                         } else if (j >= 0)
1563                                 statret = 1;
1564                 }
1565 #ifdef SUPPORT_HARD_LINKS
1566                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1567                         cur_flist->in_progress++;
1568                         goto cleanup;
1569                 }
1570 #endif
1571                 if (do_symlink(sl, fname) != 0) {
1572                         rsyserr(FERROR_XFER, errno, "symlink %s -> \"%s\" failed",
1573                                 full_fname(fname), sl);
1574                 } else {
1575                         set_file_attrs(fname, file, NULL, NULL, 0);
1576                         if (itemizing) {
1577                                 itemize(fname, file, ndx, statret, &sx,
1578                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1579                         }
1580                         if (code != FNONE && verbose)
1581                                 rprintf(code, "%s -> %s\n", fname, sl);
1582 #ifdef SUPPORT_HARD_LINKS
1583                         if (preserve_hard_links && F_IS_HLINKED(file))
1584                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1585 #endif
1586                         /* This does not check remove_source_files == 1
1587                          * because this is one of the items that the old
1588                          * --remove-sent-files option would remove. */
1589                         if (remove_source_files)
1590                                 goto return_with_success;
1591                 }
1592 #endif
1593                 goto cleanup;
1594         }
1595
1596         if ((am_root && preserve_devices && IS_DEVICE(file->mode))
1597          || (preserve_specials && IS_SPECIAL(file->mode))) {
1598                 uint32 *devp = F_RDEV_P(file);
1599                 dev_t rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
1600                 if (statret == 0) {
1601                         int del_for_flag;
1602                         if (IS_DEVICE(file->mode)) {
1603                                 if (!IS_DEVICE(sx.st.st_mode))
1604                                         statret = -1;
1605                                 del_for_flag = DEL_FOR_DEVICE;
1606                         } else {
1607                                 if (!IS_SPECIAL(sx.st.st_mode))
1608                                         statret = -1;
1609                                 del_for_flag = DEL_FOR_SPECIAL;
1610                         }
1611                         if (statret == 0
1612                          && BITS_EQUAL(sx.st.st_mode, file->mode, _S_IFMT)
1613                          && sx.st.st_rdev == rdev) {
1614                                 /* The device or special file is identical. */
1615                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1616                                 if (itemizing)
1617                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1618 #ifdef SUPPORT_HARD_LINKS
1619                                 if (preserve_hard_links && F_IS_HLINKED(file))
1620                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1621 #endif
1622                                 if (remove_source_files == 1)
1623                                         goto return_with_success;
1624                                 goto cleanup;
1625                         }
1626                         if (delete_item(fname, sx.st.st_mode, del_opts | del_for_flag) != 0)
1627                                 goto cleanup;
1628                 } else if (basis_dir[0] != NULL) {
1629                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1630                                               itemizing, code);
1631                         if (j == -2) {
1632 #ifndef CAN_HARDLINK_SPECIAL
1633                                 if (link_dest) {
1634                                         /* Resort to --copy-dest behavior. */
1635                                 } else
1636 #endif
1637                                 if (!copy_dest)
1638                                         goto cleanup;
1639                                 itemizing = 0;
1640                                 code = FNONE;
1641                         } else if (j >= 0)
1642                                 statret = 1;
1643                 }
1644 #ifdef SUPPORT_HARD_LINKS
1645                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1646                         cur_flist->in_progress++;
1647                         goto cleanup;
1648                 }
1649 #endif
1650                 if (verbose > 2) {
1651                         rprintf(FINFO, "mknod(%s, 0%o, [%ld,%ld])\n",
1652                                 fname, (int)file->mode,
1653                                 (long)major(rdev), (long)minor(rdev));
1654                 }
1655                 if (do_mknod(fname, file->mode, rdev) < 0) {
1656                         rsyserr(FERROR_XFER, errno, "mknod %s failed",
1657                                 full_fname(fname));
1658                 } else {
1659                         set_file_attrs(fname, file, NULL, NULL, 0);
1660                         if (itemizing) {
1661                                 itemize(fname, file, ndx, statret, &sx,
1662                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1663                         }
1664                         if (code != FNONE && verbose)
1665                                 rprintf(code, "%s\n", fname);
1666 #ifdef SUPPORT_HARD_LINKS
1667                         if (preserve_hard_links && F_IS_HLINKED(file))
1668                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1669 #endif
1670                         if (remove_source_files == 1)
1671                                 goto return_with_success;
1672                 }
1673                 goto cleanup;
1674         }
1675
1676         if (!S_ISREG(file->mode)) {
1677                 if (solo_file)
1678                         fname = f_name(file, NULL);
1679                 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1680                 goto cleanup;
1681         }
1682
1683         if (max_size > 0 && F_LENGTH(file) > max_size) {
1684                 if (verbose > 1) {
1685                         if (solo_file)
1686                                 fname = f_name(file, NULL);
1687                         rprintf(FINFO, "%s is over max-size\n", fname);
1688                 }
1689                 goto cleanup;
1690         }
1691         if (min_size > 0 && F_LENGTH(file) < min_size) {
1692                 if (verbose > 1) {
1693                         if (solo_file)
1694                                 fname = f_name(file, NULL);
1695                         rprintf(FINFO, "%s is under min-size\n", fname);
1696                 }
1697                 goto cleanup;
1698         }
1699
1700         if (update_only > 0 && statret == 0
1701             && cmp_time(sx.st.st_mtime, file->modtime) > 0) {
1702                 if (verbose > 1)
1703                         rprintf(FINFO, "%s is newer\n", fname);
1704 #ifdef SUPPORT_HARD_LINKS
1705                 if (F_IS_HLINKED(file))
1706                         handle_skipped_hlink(file, itemizing, code, f_out);
1707 #endif
1708                 goto cleanup;
1709         }
1710
1711         fnamecmp = fname;
1712         fnamecmp_type = FNAMECMP_FNAME;
1713
1714         if (statret == 0 && !S_ISREG(sx.st.st_mode)) {
1715                 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_FILE) != 0)
1716                         goto cleanup;
1717                 statret = -1;
1718                 stat_errno = ENOENT;
1719         }
1720
1721         if (statret != 0 && basis_dir[0] != NULL) {
1722                 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &sx,
1723                                       itemizing, code);
1724                 if (j == -2) {
1725                         if (remove_source_files == 1)
1726                                 goto return_with_success;
1727                         goto cleanup;
1728                 }
1729                 if (j >= 0) {
1730                         fnamecmp = fnamecmpbuf;
1731                         fnamecmp_type = j;
1732                         statret = 0;
1733                 }
1734         }
1735
1736         real_ret = statret;
1737         real_sx = sx;
1738
1739         if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1740             && link_stat(partialptr, &partial_st, 0) == 0
1741             && S_ISREG(partial_st.st_mode)) {
1742                 if (statret != 0)
1743                         goto prepare_to_open;
1744         } else
1745                 partialptr = NULL;
1746
1747         if (statret != 0 && fuzzy_dirlist) {
1748                 int j = find_fuzzy(file, fuzzy_dirlist);
1749                 if (j >= 0) {
1750                         fuzzy_file = fuzzy_dirlist->files[j];
1751                         f_name(fuzzy_file, fnamecmpbuf);
1752                         if (verbose > 2) {
1753                                 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1754                                         fname, fnamecmpbuf);
1755                         }
1756                         sx.st.st_size = F_LENGTH(fuzzy_file);
1757                         statret = 0;
1758                         fnamecmp = fnamecmpbuf;
1759                         fnamecmp_type = FNAMECMP_FUZZY;
1760                 }
1761         }
1762
1763         if (statret != 0) {
1764 #ifdef SUPPORT_HARD_LINKS
1765                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1766                         cur_flist->in_progress++;
1767                         goto cleanup;
1768                 }
1769 #endif
1770                 if (stat_errno == ENOENT)
1771                         goto notify_others;
1772                 rsyserr(FERROR_XFER, stat_errno, "recv_generator: failed to stat %s",
1773                         full_fname(fname));
1774                 goto cleanup;
1775         }
1776
1777         if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1778                 ;
1779         else if (fnamecmp_type == FNAMECMP_FUZZY)
1780                 ;
1781         else if (unchanged_file(fnamecmp, file, &sx.st)) {
1782                 if (partialptr) {
1783                         do_unlink(partialptr);
1784                         handle_partial_dir(partialptr, PDIR_DELETE);
1785                 }
1786                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1787                 if (itemizing)
1788                         itemize(fnamecmp, file, ndx, statret, &sx, 0, 0, NULL);
1789 #ifdef SUPPORT_HARD_LINKS
1790                 if (preserve_hard_links && F_IS_HLINKED(file))
1791                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1792 #endif
1793                 if (remove_source_files != 1)
1794                         goto cleanup;
1795           return_with_success:
1796                 if (!dry_run)
1797                         send_msg_int(MSG_SUCCESS, ndx);
1798                 goto cleanup;
1799         }
1800
1801         if (append_mode > 0 && sx.st.st_size >= F_LENGTH(file)) {
1802 #ifdef SUPPORT_HARD_LINKS
1803                 if (F_IS_HLINKED(file))
1804                         handle_skipped_hlink(file, itemizing, code, f_out);
1805 #endif
1806                 goto cleanup;
1807         }
1808
1809   prepare_to_open:
1810         if (partialptr) {
1811                 sx.st = partial_st;
1812                 fnamecmp = partialptr;
1813                 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1814                 statret = 0;
1815         }
1816
1817         if (!do_xfers)
1818                 goto notify_others;
1819
1820         if (read_batch || whole_file) {
1821                 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1822                         if (!(backupptr = get_backup_name(fname)))
1823                                 goto cleanup;
1824                         if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
1825                                 goto pretend_missing;
1826                         if (copy_file(fname, backupptr, -1, back_file->mode, 1) < 0) {
1827                                 unmake_file(back_file);
1828                                 back_file = NULL;
1829                                 goto cleanup;
1830                         }
1831                 }
1832                 goto notify_others;
1833         }
1834
1835         if (fuzzy_dirlist) {
1836                 int j = flist_find(fuzzy_dirlist, file);
1837                 if (j >= 0) /* don't use changing file as future fuzzy basis */
1838                         fuzzy_dirlist->files[j]->flags |= FLAG_FILE_SENT;
1839         }
1840
1841         /* open the file */
1842         if ((fd = do_open(fnamecmp, O_RDONLY, 0)) < 0) {
1843                 rsyserr(FERROR, errno, "failed to open %s, continuing",
1844                         full_fname(fnamecmp));
1845           pretend_missing:
1846                 /* pretend the file didn't exist */
1847 #ifdef SUPPORT_HARD_LINKS
1848                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1849                         cur_flist->in_progress++;
1850                         goto cleanup;
1851                 }
1852 #endif
1853                 statret = real_ret = -1;
1854                 goto notify_others;
1855         }
1856
1857         if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1858                 if (!(backupptr = get_backup_name(fname))) {
1859                         close(fd);
1860                         goto cleanup;
1861                 }
1862                 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1863                         close(fd);
1864                         goto pretend_missing;
1865                 }
1866                 if (robust_unlink(backupptr) && errno != ENOENT) {
1867                         rsyserr(FERROR_XFER, errno, "unlink %s",
1868                                 full_fname(backupptr));
1869                         unmake_file(back_file);
1870                         back_file = NULL;
1871                         close(fd);
1872                         goto cleanup;
1873                 }
1874                 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1875                         int save_errno = errno ? errno : EINVAL; /* 0 paranoia */
1876                         if (errno == ENOENT && make_bak_dir(backupptr) == 0) {
1877                                 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0)
1878                                         save_errno = errno ? errno : save_errno;
1879                                 else
1880                                         save_errno = 0;
1881                         }
1882                         if (save_errno) {
1883                                 rsyserr(FERROR_XFER, save_errno, "open %s", full_fname(backupptr));
1884                                 unmake_file(back_file);
1885                                 back_file = NULL;
1886                                 close(fd);
1887                                 goto cleanup;
1888                         }
1889                 }
1890                 fnamecmp_type = FNAMECMP_BACKUP;
1891         }
1892
1893         if (verbose > 3) {
1894                 rprintf(FINFO, "gen mapped %s of size %.0f\n",
1895                         fnamecmp, (double)sx.st.st_size);
1896         }
1897
1898         if (verbose > 2)
1899                 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1900
1901   notify_others:
1902         if (remove_source_files && !delay_updates && !phase && !dry_run)
1903                 increment_active_files(ndx, itemizing, code);
1904         if (inc_recurse && !dry_run)
1905                 cur_flist->in_progress++;
1906 #ifdef SUPPORT_HARD_LINKS
1907         if (preserve_hard_links && F_IS_HLINKED(file))
1908                 file->flags |= FLAG_FILE_SENT;
1909 #endif
1910         write_ndx(f_out, ndx);
1911         if (itemizing) {
1912                 int iflags = ITEM_TRANSFER;
1913                 if (always_checksum > 0)
1914                         iflags |= ITEM_REPORT_CHANGE;
1915                 if (fnamecmp_type != FNAMECMP_FNAME)
1916                         iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1917                 if (fnamecmp_type == FNAMECMP_FUZZY)
1918                         iflags |= ITEM_XNAME_FOLLOWS;
1919                 itemize(fnamecmp, file, -1, real_ret, &real_sx, iflags, fnamecmp_type,
1920                         fuzzy_file ? fuzzy_file->basename : NULL);
1921 #ifdef SUPPORT_ACLS
1922                 if (preserve_acls)
1923                         free_acl(&real_sx);
1924 #endif
1925 #ifdef SUPPORT_XATTRS
1926                 if (preserve_xattrs)
1927                         free_xattr(&real_sx);
1928 #endif
1929         }
1930
1931         if (!do_xfers) {
1932 #ifdef SUPPORT_HARD_LINKS
1933                 if (preserve_hard_links && F_IS_HLINKED(file))
1934                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1935 #endif
1936                 goto cleanup;
1937         }
1938         if (read_batch)
1939                 goto cleanup;
1940
1941         if (statret != 0 || whole_file)
1942                 write_sum_head(f_out, NULL);
1943         else {
1944                 generate_and_send_sums(fd, sx.st.st_size, f_out, f_copy);
1945                 close(fd);
1946         }
1947
1948   cleanup:
1949         if (back_file) {
1950                 int save_preserve_xattrs = preserve_xattrs;
1951                 if (f_copy >= 0)
1952                         close(f_copy);
1953 #ifdef SUPPORT_XATTRS
1954                 if (preserve_xattrs) {
1955                         copy_xattrs(fname, backupptr);
1956                         preserve_xattrs = 0;
1957                 }
1958 #endif
1959                 set_file_attrs(backupptr, back_file, NULL, NULL, 0);
1960                 preserve_xattrs = save_preserve_xattrs;
1961                 if (verbose > 1) {
1962                         rprintf(FINFO, "backed up %s to %s\n",
1963                                 fname, backupptr);
1964                 }
1965                 unmake_file(back_file);
1966         }
1967
1968 #ifdef SUPPORT_ACLS
1969         if (preserve_acls)
1970                 free_acl(&sx);
1971 #endif
1972 #ifdef SUPPORT_XATTRS
1973         if (preserve_xattrs)
1974                 free_xattr(&sx);
1975 #endif
1976         return;
1977 }
1978
1979 #ifdef SUPPORT_HARD_LINKS
1980 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
1981                                  enum logcode code, int f_out)
1982 {
1983         char fbuf[MAXPATHLEN];
1984         int new_last_ndx;
1985         struct file_list *save_flist = cur_flist;
1986
1987         /* If we skip the last item in a chain of links and there was a
1988          * prior non-skipped hard-link waiting to finish, finish it now. */
1989         if ((new_last_ndx = skip_hard_link(file, &cur_flist)) < 0)
1990                 return;
1991
1992         file = cur_flist->files[new_last_ndx - cur_flist->ndx_start];
1993         cur_flist->in_progress--; /* undo prior increment */
1994         f_name(file, fbuf);
1995         recv_generator(fbuf, file, new_last_ndx, itemizing, code, f_out);
1996
1997         cur_flist = save_flist;
1998 }
1999 #endif
2000
2001 static void touch_up_dirs(struct file_list *flist, int ndx)
2002 {
2003         static int counter = 0;
2004         struct file_struct *file;
2005         char *fname;
2006         int i, start, end;
2007
2008         if (ndx < 0) {
2009                 start = 0;
2010                 end = flist->used - 1;
2011         } else
2012                 start = end = ndx;
2013
2014         /* Fix any directory permissions that were modified during the
2015          * transfer and/or re-set any tweaked modified-time values. */
2016         for (i = start; i <= end; i++, counter++) {
2017                 file = flist->files[i];
2018                 if (!S_ISDIR(file->mode)
2019                  || (!implied_dirs && file->flags & FLAG_IMPLIED_DIR))
2020                         continue;
2021                 if (verbose > 3) {
2022                         fname = f_name(file, NULL);
2023                         rprintf(FINFO, "touch_up_dirs: %s (%d)\n",
2024                                 NS(fname), i);
2025                 }
2026                 if (!F_IS_ACTIVE(file) || file->flags & FLAG_MISSING_DIR
2027                  || (!need_retouch_dir_times && file->mode & S_IWUSR))
2028                         continue;
2029                 fname = f_name(file, NULL);
2030                 if (!(file->mode & S_IWUSR))
2031                         do_chmod(fname, file->mode);
2032                 if (need_retouch_dir_times) {
2033                         STRUCT_STAT st;
2034                         if (link_stat(fname, &st, 0) == 0
2035                          && cmp_time(st.st_mtime, file->modtime) != 0)
2036                                 set_modtime(fname, file->modtime, file->mode);
2037                 }
2038                 if (allowed_lull && !(counter % lull_mod))
2039                         maybe_send_keepalive();
2040                 else if (!(counter & 0xFF))
2041                         maybe_flush_socket(0);
2042         }
2043 }
2044
2045 void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
2046 {
2047         struct file_struct *file;
2048         struct file_list *flist;
2049         char fbuf[MAXPATHLEN];
2050         int ndx;
2051
2052         while (1) {
2053 #ifdef SUPPORT_HARD_LINKS
2054                 if (preserve_hard_links && (ndx = get_hlink_num()) != -1) {
2055                         flist = flist_for_ndx(ndx);
2056                         assert(flist != NULL);
2057                         file = flist->files[ndx - flist->ndx_start];
2058                         assert(file->flags & FLAG_HLINKED);
2059                         finish_hard_link(file, f_name(file, fbuf), ndx, NULL, itemizing, code, -1);
2060                         flist->in_progress--;
2061                         continue;
2062                 }
2063 #endif
2064
2065                 if (check_redo && (ndx = get_redo_num()) != -1) {
2066                         csum_length = SUM_LENGTH;
2067                         max_size = -max_size;
2068                         min_size = -min_size;
2069                         ignore_existing = -ignore_existing;
2070                         ignore_non_existing = -ignore_non_existing;
2071                         update_only = -update_only;
2072                         always_checksum = -always_checksum;
2073                         size_only = -size_only;
2074                         append_mode = -append_mode;
2075                         make_backups = -make_backups; /* avoid dup backup w/inplace */
2076                         ignore_times++;
2077
2078                         flist = cur_flist;
2079                         cur_flist = flist_for_ndx(ndx);
2080
2081                         file = cur_flist->files[ndx - cur_flist->ndx_start];
2082                         if (solo_file)
2083                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2084                         else
2085                                 f_name(file, fbuf);
2086                         recv_generator(fbuf, file, ndx, itemizing, code, sock_f_out);
2087                         cur_flist->to_redo--;
2088
2089                         cur_flist = flist;
2090
2091                         csum_length = SHORT_SUM_LENGTH;
2092                         max_size = -max_size;
2093                         min_size = -min_size;
2094                         ignore_existing = -ignore_existing;
2095                         ignore_non_existing = -ignore_non_existing;
2096                         update_only = -update_only;
2097                         always_checksum = -always_checksum;
2098                         size_only = -size_only;
2099                         append_mode = -append_mode;
2100                         make_backups = -make_backups;
2101                         ignore_times--;
2102                         continue;
2103                 }
2104
2105                 if (cur_flist == first_flist)
2106                         break;
2107
2108                 /* We only get here if inc_recurse is enabled. */
2109                 if (first_flist->in_progress || first_flist->to_redo)
2110                         break;
2111
2112                 if (!read_batch) {
2113                         write_ndx(sock_f_out, NDX_DONE);
2114                         maybe_flush_socket(1);
2115                 }
2116
2117                 if (delete_during == 2 || !dir_tweaking) {
2118                         /* Skip directory touch-up. */
2119                 } else if (first_flist->parent_ndx >= 0)
2120                         touch_up_dirs(dir_flist, first_flist->parent_ndx);
2121
2122                 flist_free(first_flist); /* updates first_flist */
2123         }
2124 }
2125
2126 void generate_files(int f_out, const char *local_name)
2127 {
2128         int i, ndx;
2129         char fbuf[MAXPATHLEN];
2130         int itemizing;
2131         enum logcode code;
2132         int save_do_progress = do_progress;
2133
2134         if (protocol_version >= 29) {
2135                 itemizing = 1;
2136                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2137                 code = logfile_format_has_i ? FNONE : FLOG;
2138         } else if (am_daemon) {
2139                 itemizing = logfile_format_has_i && do_xfers;
2140                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2141                 code = itemizing || !do_xfers ? FCLIENT : FINFO;
2142         } else if (!am_server) {
2143                 itemizing = stdout_format_has_i;
2144                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2145                 code = itemizing ? FNONE : FINFO;
2146         } else {
2147                 itemizing = 0;
2148                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2149                 code = FINFO;
2150         }
2151         solo_file = local_name;
2152         dir_tweaking = !(list_only || solo_file || dry_run);
2153         need_retouch_dir_times = preserve_times > 1;
2154         lull_mod = allowed_lull * 5;
2155         symlink_timeset_failed_flags = ITEM_REPORT_TIME
2156             | (protocol_version >= 30 || !am_server ? ITEM_REPORT_TIMEFAIL : 0);
2157         implied_dirs_are_missing = relative_paths && !implied_dirs && protocol_version < 30;
2158
2159         if (verbose > 2)
2160                 rprintf(FINFO, "generator starting pid=%ld\n", (long)getpid());
2161
2162         if (delete_before && !solo_file && cur_flist->used > 0)
2163                 do_delete_pass();
2164         if (delete_during == 2) {
2165                 deldelay_size = BIGPATHBUFLEN * 4;
2166                 deldelay_buf = new_array(char, deldelay_size);
2167                 if (!deldelay_buf)
2168                         out_of_memory("delete-delay");
2169         }
2170         do_progress = 0;
2171
2172         if (append_mode > 0 || whole_file < 0)
2173                 whole_file = 0;
2174         if (verbose >= 2) {
2175                 rprintf(FINFO, "delta-transmission %s\n",
2176                         whole_file
2177                         ? "disabled for local transfer or --whole-file"
2178                         : "enabled");
2179         }
2180
2181         /* Since we often fill up the outgoing socket and then just sit around
2182          * waiting for the other 2 processes to do their thing, we don't want
2183          * to exit on a timeout.  If the data stops flowing, the receiver will
2184          * notice that and let us know via the redo pipe (or its closing). */
2185         ignore_timeout = 1;
2186
2187         dflt_perms = (ACCESSPERMS & ~orig_umask);
2188
2189         do {
2190 #ifdef SUPPORT_HARD_LINKS
2191                 if (preserve_hard_links && inc_recurse) {
2192                         while (!flist_eof && file_total < FILECNT_LOOKAHEAD/2)
2193                                 wait_for_receiver();
2194                 }
2195 #endif
2196
2197                 if (inc_recurse && cur_flist->parent_ndx >= 0) {
2198                         struct file_struct *fp = dir_flist->files[cur_flist->parent_ndx];
2199                         f_name(fp, fbuf);
2200                         ndx = cur_flist->ndx_start - 1;
2201                         recv_generator(fbuf, fp, ndx, itemizing, code, f_out);
2202                         if (delete_during && dry_run < 2 && !list_only
2203                          && !(fp->flags & FLAG_MISSING_DIR)) {
2204                                 if (fp->flags & FLAG_CONTENT_DIR) {
2205                                         dev_t dirdev;
2206                                         if (one_file_system) {
2207                                                 uint32 *devp = F_DIR_DEV_P(fp);
2208                                                 dirdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
2209                                         } else
2210                                                 dirdev = MAKEDEV(0, 0);
2211                                         delete_in_dir(fbuf, fp, &dirdev);
2212                                 } else
2213                                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(fp));
2214                         }
2215                 }
2216                 for (i = cur_flist->low; i <= cur_flist->high; i++) {
2217                         struct file_struct *file = cur_flist->sorted[i];
2218
2219                         if (!F_IS_ACTIVE(file))
2220                                 continue;
2221
2222                         if (unsort_ndx)
2223                                 ndx = F_NDX(file);
2224                         else
2225                                 ndx = i + cur_flist->ndx_start;
2226
2227                         if (solo_file)
2228                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2229                         else
2230                                 f_name(file, fbuf);
2231                         recv_generator(fbuf, file, ndx, itemizing, code, f_out);
2232
2233                         check_for_finished_files(itemizing, code, 0);
2234
2235                         if (allowed_lull && !(i % lull_mod))
2236                                 maybe_send_keepalive();
2237                         else if (!(i & 0xFF))
2238                                 maybe_flush_socket(0);
2239                 }
2240
2241                 if (!inc_recurse) {
2242                         write_ndx(f_out, NDX_DONE);
2243                         break;
2244                 }
2245
2246                 while (1) {
2247                         check_for_finished_files(itemizing, code, 1);
2248                         if (cur_flist->next || flist_eof)
2249                                 break;
2250                         wait_for_receiver();
2251                 }
2252         } while ((cur_flist = cur_flist->next) != NULL);
2253
2254         if (delete_during)
2255                 delete_in_dir(NULL, NULL, &dev_zero);
2256         phase++;
2257         if (verbose > 2)
2258                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2259
2260         while (1) {
2261                 check_for_finished_files(itemizing, code, 1);
2262                 if (msgdone_cnt)
2263                         break;
2264                 wait_for_receiver();
2265         }
2266
2267         phase++;
2268         if (verbose > 2)
2269                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2270
2271         write_ndx(f_out, NDX_DONE);
2272         /* Reduce round-trip lag-time for a useless delay-updates phase. */
2273         if (protocol_version >= 29 && !delay_updates)
2274                 write_ndx(f_out, NDX_DONE);
2275
2276         /* Read MSG_DONE for the redo phase (and any prior messages). */
2277         while (1) {
2278                 check_for_finished_files(itemizing, code, 0);
2279                 if (msgdone_cnt > 1)
2280                         break;
2281                 wait_for_receiver();
2282         }
2283
2284         if (protocol_version >= 29) {
2285                 phase++;
2286                 if (verbose > 2)
2287                         rprintf(FINFO, "generate_files phase=%d\n", phase);
2288                 if (delay_updates)
2289                         write_ndx(f_out, NDX_DONE);
2290                 /* Read MSG_DONE for delay-updates phase & prior messages. */
2291                 while (msgdone_cnt == 2)
2292                         wait_for_receiver();
2293         }
2294
2295         do_progress = save_do_progress;
2296         if (delete_during == 2)
2297                 do_delayed_deletions(fbuf);
2298         if (delete_after && !solo_file && file_total > 0)
2299                 do_delete_pass();
2300
2301         if ((need_retouch_dir_perms || need_retouch_dir_times)
2302          && dir_tweaking && (!inc_recurse || delete_during == 2))
2303                 touch_up_dirs(dir_flist, -1);
2304
2305         if (max_delete >= 0 && deletion_count > max_delete) {
2306                 rprintf(FINFO,
2307                         "Deletions stopped due to --max-delete limit (%d skipped)\n",
2308                         deletion_count - max_delete);
2309                 io_error |= IOERR_DEL_LIMIT;
2310         }
2311
2312         if (verbose > 2)
2313                 rprintf(FINFO, "generate_files finished\n");
2314 }