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) 2003-2009 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 delete_mode;
  48 extern int delete_before;
  49 extern int delete_during;
  50 extern int delete_after;
  51 extern int msgdone_cnt;
  52 extern int ignore_errors;
  53 extern int remove_source_files;
  54 extern int delay_updates;
  55 extern int update_only;
  56 extern int ignore_existing;
  57 extern int ignore_non_existing;
  58 extern int inplace;
  59 extern int append_mode;
  60 extern int make_backups;
  61 extern int csum_length;
  62 extern int ignore_times;
  63 extern int size_only;
  64 extern OFF_T max_size;
  65 extern OFF_T min_size;
  66 extern int io_error;
  67 extern int flist_eof;
  68 extern int allowed_lull;
  69 extern int sock_f_out;
  70 extern int ignore_timeout;
  71 extern int protocol_version;
  72 extern int file_total;
  73 extern int fuzzy_basis;
  74 extern int always_checksum;
  75 extern int checksum_len;
  76 extern char *partial_dir;
  77 extern char *basis_dir[MAX_BASIS_DIRS+1];
  78 extern int compare_dest;
  79 extern int copy_dest;
  80 extern int link_dest;
  81 extern int whole_file;
  82 extern int list_only;
  83 extern int read_batch;
  84 extern int safe_symlinks;
  85 extern long block_size; /* "long" because popt can't set an int32. */
  86 extern int unsort_ndx;
  87 extern int max_delete;
  88 extern int force_delete;
  89 extern int one_file_system;
  90 extern struct stats stats;
  91 extern dev_t filesystem_dev;
  92 extern mode_t orig_umask;
  93 extern uid_t our_uid;
  94 extern char *backup_dir;
  95 extern char *backup_suffix;
  96 extern int backup_suffix_len;
  97 extern struct file_list *cur_flist, *first_flist, *dir_flist;
  98 extern struct filter_list_struct daemon_filter_list;
  99
 100 int ignore_perishable = 0;
 101 int non_perishable_cnt = 0;
 102 int maybe_ATTRS_REPORT = 0;
 103
 104 static dev_t dev_zero;
 105 static int deletion_count = 0; /* used to implement --max-delete */
 106 static int deldelay_size = 0, deldelay_cnt = 0;
 107 static char *deldelay_buf = NULL;
 108 static int deldelay_fd = -1;
 109 static int loopchk_limit;
 110 static int dir_tweaking;
 111 static int symlink_timeset_failed_flags;
 112 static int need_retouch_dir_times;
 113 static int need_retouch_dir_perms;
 114 static const char *solo_file = NULL;
 115
 116 /* For calling delete_item() and delete_dir_contents(). */
 117 #define DEL_NO_UID_WRITE        (1<<0) /* file/dir has our uid w/o write perm */
 118 #define DEL_RECURSE             (1<<1) /* if dir, delete all contents */
 119 #define DEL_DIR_IS_EMPTY        (1<<2) /* internal delete_FUNCTIONS use only */
 120 #define DEL_FOR_FILE            (1<<3) /* making room for a replacement file */
 121 #define DEL_FOR_DIR             (1<<4) /* making room for a replacement dir */
 122 #define DEL_FOR_SYMLINK         (1<<5) /* making room for a replacement symlink */
 123 #define DEL_FOR_DEVICE          (1<<6) /* making room for a replacement device */
 124 #define DEL_FOR_SPECIAL         (1<<7) /* making room for a replacement special */
 125
 126 #define DEL_MAKE_ROOM (DEL_FOR_FILE|DEL_FOR_DIR|DEL_FOR_SYMLINK|DEL_FOR_DEVICE|DEL_FOR_SPECIAL)
 127
 128 enum nonregtype {
 129     TYPE_DIR, TYPE_SPECIAL, TYPE_DEVICE, TYPE_SYMLINK
 130 };
 131
 132 enum delret {
 133     DR_SUCCESS = 0, DR_FAILURE, DR_AT_LIMIT, DR_NOT_EMPTY
 134 };
 135
 136 /* Forward declarations. */
 137 static enum delret delete_dir_contents(char *fname, uint16 flags);
 138 #ifdef SUPPORT_HARD_LINKS
 139 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
 140                                  enum logcode code, int f_out);
 141 #endif
 142
 143 static int is_backup_file(char *fn)
 144 {
 145         int k = strlen(fn) - backup_suffix_len;
 146         return k > 0 && strcmp(fn+k, backup_suffix) == 0;
 147 }
 148
 149 /* Delete a file or directory.  If DEL_RECURSE is set in the flags, this will
 150  * delete recursively.
 151  *
 152  * Note that fbuf must point to a MAXPATHLEN buffer if the mode indicates it's
 153  * a directory! (The buffer is used for recursion, but returned unchanged.)
 154  */
 155 static enum delret delete_item(char *fbuf, uint16 mode, uint16 flags)
 156 {
 157         enum delret ret;
 158         char *what;
 159         int ok;
 160
 161         if (verbose > 2) {
 162                 rprintf(FINFO, "delete_item(%s) mode=%o flags=%d\n",
 163                         fbuf, (int)mode, (int)flags);
 164         }
 165
 166         if (flags & DEL_NO_UID_WRITE)
 167                 do_chmod(fbuf, mode | S_IWUSR);
 168
 169         if (S_ISDIR(mode) && !(flags & DEL_DIR_IS_EMPTY)) {
 170                 /* This only happens on the first call to delete_item() since
 171                  * delete_dir_contents() always calls us w/DEL_DIR_IS_EMPTY. */
 172                 ignore_perishable = 1;
 173                 /* If DEL_RECURSE is not set, this just reports emptiness. */
 174                 ret = delete_dir_contents(fbuf, flags);
 175                 ignore_perishable = 0;
 176                 if (ret == DR_NOT_EMPTY || ret == DR_AT_LIMIT)
 177                         goto check_ret;
 178                 /* OK: try to delete the directory. */
 179         }
 180
 181         if (!(flags & DEL_MAKE_ROOM) && max_delete >= 0 && ++deletion_count > max_delete)
 182                 return DR_AT_LIMIT;
 183
 184         if (S_ISDIR(mode)) {
 185                 what = "rmdir";
 186                 ok = do_rmdir(fbuf) == 0;
 187         } else if (make_backups > 0 && (backup_dir || !is_backup_file(fbuf))) {
 188                 what = "make_backup";
 189                 ok = make_backup(fbuf);
 190         } else {
 191                 what = "unlink";
 192                 ok = robust_unlink(fbuf) == 0;
 193         }
 194
 195         if (ok) {
 196                 if (!(flags & DEL_MAKE_ROOM))
 197                         log_delete(fbuf, mode);
 198                 ret = DR_SUCCESS;
 199         } else {
 200                 if (S_ISDIR(mode) && errno == ENOTEMPTY) {
 201                         rprintf(FINFO, "cannot delete non-empty directory: %s\n",
 202                                 fbuf);
 203                         ret = DR_NOT_EMPTY;
 204                 } else if (errno != ENOENT) {
 205                         rsyserr(FERROR, errno, "delete_file: %s(%s) failed",
 206                                 what, fbuf);
 207                         ret = DR_FAILURE;
 208                 } else {
 209                         deletion_count--;
 210                         ret = DR_SUCCESS;
 211                 }
 212         }
 213
 214   check_ret:
 215         if (ret != DR_SUCCESS && flags & DEL_MAKE_ROOM) {
 216                 const char *desc;
 217                 switch (flags & DEL_MAKE_ROOM) {
 218                 case DEL_FOR_FILE: desc = "regular file"; break;
 219                 case DEL_FOR_DIR: desc = "directory"; break;
 220                 case DEL_FOR_SYMLINK: desc = "symlink"; break;
 221                 case DEL_FOR_DEVICE: desc = "device file"; break;
 222                 case DEL_FOR_SPECIAL: desc = "special file"; break;
 223                 default: exit_cleanup(RERR_UNSUPPORTED); /* IMPOSSIBLE */
 224                 }
 225                 rprintf(FERROR_XFER, "could not make way for new %s: %s\n",
 226                         desc, fbuf);
 227         }
 228         return ret;
 229 }
 230
 231 /* The directory is about to be deleted: if DEL_RECURSE is given, delete all
 232  * its contents, otherwise just checks for content.  Returns DR_SUCCESS or
 233  * DR_NOT_EMPTY.  Note that fname must point to a MAXPATHLEN buffer!  (The
 234  * buffer is used for recursion, but returned unchanged.)
 235  */
 236 static enum delret delete_dir_contents(char *fname, uint16 flags)
 237 {
 238         struct file_list *dirlist;
 239         enum delret ret;
 240         unsigned remainder;
 241         void *save_filters;
 242         int j, dlen;
 243         char *p;
 244
 245         if (verbose > 3) {
 246                 rprintf(FINFO, "delete_dir_contents(%s) flags=%d\n",
 247                         fname, flags);
 248         }
 249
 250         dlen = strlen(fname);
 251         save_filters = push_local_filters(fname, dlen);
 252
 253         non_perishable_cnt = 0;
 254         dirlist = get_dirlist(fname, dlen, 0);
 255         ret = non_perishable_cnt ? DR_NOT_EMPTY : DR_SUCCESS;
 256
 257         if (!dirlist->used)
 258                 goto done;
 259
 260         if (!(flags & DEL_RECURSE)) {
 261                 ret = DR_NOT_EMPTY;
 262                 goto done;
 263         }
 264
 265         p = fname + dlen;
 266         if (dlen != 1 || *fname != '/')
 267                 *p++ = '/';
 268         remainder = MAXPATHLEN - (p - fname);
 269
 270         /* We do our own recursion, so make delete_item() non-recursive. */
 271         flags = (flags & ~(DEL_RECURSE|DEL_MAKE_ROOM|DEL_NO_UID_WRITE))
 272               | DEL_DIR_IS_EMPTY;
 273
 274         for (j = dirlist->used; j--; ) {
 275                 struct file_struct *fp = dirlist->files[j];
 276
 277                 if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) {
 278                         if (verbose > 1) {
 279                                 rprintf(FINFO,
 280                                     "mount point, %s, pins parent directory\n",
 281                                     f_name(fp, NULL));
 282                         }
 283                         ret = DR_NOT_EMPTY;
 284                         continue;
 285                 }
 286
 287                 strlcpy(p, fp->basename, remainder);
 288                 if (!(fp->mode & S_IWUSR) && !am_root && fp->flags & FLAG_OWNED_BY_US)
 289                         do_chmod(fname, fp->mode | S_IWUSR);
 290                 /* Save stack by recursing to ourself directly. */
 291                 if (S_ISDIR(fp->mode)) {
 292                         if (delete_dir_contents(fname, flags | DEL_RECURSE) != DR_SUCCESS)
 293                                 ret = DR_NOT_EMPTY;
 294                 }
 295                 if (delete_item(fname, fp->mode, flags) != DR_SUCCESS)
 296                         ret = DR_NOT_EMPTY;
 297         }
 298
 299         fname[dlen] = '\0';
 300
 301   done:
 302         flist_free(dirlist);
 303         pop_local_filters(save_filters);
 304
 305         if (ret == DR_NOT_EMPTY) {
 306                 rprintf(FINFO, "cannot delete non-empty directory: %s\n",
 307                         fname);
 308         }
 309         return ret;
 310 }
 311
 312 static int start_delete_delay_temp(void)
 313 {
 314         char fnametmp[MAXPATHLEN];
 315         int save_dry_run = dry_run;
 316
 317         dry_run = 0;
 318         if (!get_tmpname(fnametmp, "deldelay")
 319          || (deldelay_fd = do_mkstemp(fnametmp, 0600)) < 0) {
 320                 rprintf(FINFO, "NOTE: Unable to create delete-delay temp file%s.\n",
 321                         inc_recurse ? "" : " -- switching to --delete-after");
 322                 delete_during = 0;
 323                 delete_after = !inc_recurse;
 324                 dry_run = save_dry_run;
 325                 return 0;
 326         }
 327         unlink(fnametmp);
 328         dry_run = save_dry_run;
 329         return 1;
 330 }
 331
 332 static int flush_delete_delay(void)
 333 {
 334         if (deldelay_fd < 0 && !start_delete_delay_temp())
 335                 return 0;
 336         if (write(deldelay_fd, deldelay_buf, deldelay_cnt) != deldelay_cnt) {
 337                 rsyserr(FERROR, errno, "flush of delete-delay buffer");
 338                 delete_during = 0;
 339                 delete_after = !inc_recurse;
 340                 close(deldelay_fd);
 341                 return 0;
 342         }
 343         deldelay_cnt = 0;
 344         return 1;
 345 }
 346
 347 static int remember_delete(struct file_struct *file, const char *fname, int flags)
 348 {
 349         int len;
 350
 351         if (deldelay_cnt == deldelay_size && !flush_delete_delay())
 352                 return 0;
 353
 354         if (flags & DEL_NO_UID_WRITE)
 355                 deldelay_buf[deldelay_cnt++] = '!';
 356
 357         while (1) {
 358                 len = snprintf(deldelay_buf + deldelay_cnt,
 359                                deldelay_size - deldelay_cnt,
 360                                "%x %s%c",
 361                                (int)file->mode, fname, '\0');
 362                 if ((deldelay_cnt += len) <= deldelay_size)
 363                         break;
 364                 deldelay_cnt -= len;
 365                 if (!flush_delete_delay())
 366                         return 0;
 367         }
 368
 369         return 1;
 370 }
 371
 372 static int read_delay_line(char *buf, int *flags_p)
 373 {
 374         static int read_pos = 0;
 375         int j, len, mode;
 376         char *bp, *past_space;
 377
 378         while (1) {
 379                 for (j = read_pos; j < deldelay_cnt && deldelay_buf[j]; j++) {}
 380                 if (j < deldelay_cnt)
 381                         break;
 382                 if (deldelay_fd < 0) {
 383                         if (j > read_pos)
 384                                 goto invalid_data;
 385                         return -1;
 386                 }
 387                 deldelay_cnt -= read_pos;
 388                 if (deldelay_cnt == deldelay_size)
 389                         goto invalid_data;
 390                 if (deldelay_cnt && read_pos) {
 391                         memmove(deldelay_buf, deldelay_buf + read_pos,
 392                                 deldelay_cnt);
 393                 }
 394                 len = read(deldelay_fd, deldelay_buf + deldelay_cnt,
 395                            deldelay_size - deldelay_cnt);
 396                 if (len == 0) {
 397                         if (deldelay_cnt) {
 398                                 rprintf(FERROR,
 399                                     "ERROR: unexpected EOF in delete-delay file.\n");
 400                         }
 401                         return -1;
 402                 }
 403                 if (len < 0) {
 404                         rsyserr(FERROR, errno,
 405                                 "reading delete-delay file");
 406                         return -1;
 407                 }
 408                 deldelay_cnt += len;
 409                 read_pos = 0;
 410         }
 411
 412         bp = deldelay_buf + read_pos;
 413         if (*bp == '!') {
 414                 bp++;
 415                 *flags_p = DEL_NO_UID_WRITE;
 416         } else
 417                 *flags_p = 0;
 418
 419         if (sscanf(bp, "%x ", &mode) != 1) {
 420           invalid_data:
 421                 rprintf(FERROR, "ERROR: invalid data in delete-delay file.\n");
 422                 return -1;
 423         }
 424         past_space = strchr(bp, ' ') + 1;
 425         len = j - read_pos - (past_space - bp) + 1; /* count the '\0' */
 426         read_pos = j + 1;
 427
 428         if (len > MAXPATHLEN) {
 429                 rprintf(FERROR, "ERROR: filename too long in delete-delay file.\n");
 430                 return -1;
 431         }
 432
 433         /* The caller needs the name in a MAXPATHLEN buffer, so we copy it
 434          * instead of returning a pointer to our buffer. */
 435         memcpy(buf, past_space, len);
 436
 437         return mode;
 438 }
 439
 440 static void do_delayed_deletions(char *delbuf)
 441 {
 442         int mode, flags;
 443
 444         if (deldelay_fd >= 0) {
 445                 if (deldelay_cnt && !flush_delete_delay())
 446                         return;
 447                 lseek(deldelay_fd, 0, 0);
 448         }
 449         while ((mode = read_delay_line(delbuf, &flags)) >= 0)
 450                 delete_item(delbuf, mode, flags | DEL_RECURSE);
 451         if (deldelay_fd >= 0)
 452                 close(deldelay_fd);
 453 }
 454
 455 /* This function is used to implement per-directory deletion, and is used by
 456  * all the --delete-WHEN options.  Note that the fbuf pointer must point to a
 457  * MAXPATHLEN buffer with the name of the directory in it (the functions we
 458  * call will append names onto the end, but the old dir value will be restored
 459  * on exit). */
 460 static void delete_in_dir(char *fbuf, struct file_struct *file, dev_t *fs_dev)
 461 {
 462         static int already_warned = 0;
 463         struct file_list *dirlist;
 464         char delbuf[MAXPATHLEN];
 465         int dlen, i;
 466
 467         if (!fbuf) {
 468                 change_local_filter_dir(NULL, 0, 0);
 469                 return;
 470         }
 471
 472         if (verbose > 2)
 473                 rprintf(FINFO, "delete_in_dir(%s)\n", fbuf);
 474
 475         if (allowed_lull)
 476                 maybe_send_keepalive();
 477
 478         if (io_error && !ignore_errors) {
 479                 if (already_warned)
 480                         return;
 481                 rprintf(FINFO,
 482                         "IO error encountered -- skipping file deletion\n");
 483                 already_warned = 1;
 484                 return;
 485         }
 486
 487         dlen = strlen(fbuf);
 488         change_local_filter_dir(fbuf, dlen, F_DEPTH(file));
 489
 490         if (one_file_system) {
 491                 if (file->flags & FLAG_TOP_DIR)
 492                         filesystem_dev = *fs_dev;
 493                 else if (filesystem_dev != *fs_dev)
 494                         return;
 495         }
 496
 497         dirlist = get_dirlist(fbuf, dlen, 0);
 498
 499         /* If an item in dirlist is not found in flist, delete it
 500          * from the filesystem. */
 501         for (i = dirlist->used; i--; ) {
 502                 struct file_struct *fp = dirlist->files[i];
 503                 if (!F_IS_ACTIVE(fp))
 504                         continue;
 505                 if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) {
 506                         if (verbose > 1)
 507                                 rprintf(FINFO, "cannot delete mount point: %s\n",
 508                                         f_name(fp, NULL));
 509                         continue;
 510                 }
 511                 /* Here we want to match regardless of file type.  Replacement
 512                  * of a file with one of another type is handled separately by
 513                  * a delete_item call with a DEL_MAKE_ROOM flag. */
 514                 if (flist_find_ignore_dirness(cur_flist, fp) < 0) {
 515                         int flags = DEL_RECURSE;
 516                         if (!(fp->mode & S_IWUSR) && !am_root && fp->flags & FLAG_OWNED_BY_US)
 517                                 flags |= DEL_NO_UID_WRITE;
 518                         f_name(fp, delbuf);
 519                         if (delete_during == 2) {
 520                                 if (!remember_delete(fp, delbuf, flags))
 521                                         break;
 522                         } else
 523                                 delete_item(delbuf, fp->mode, flags);
 524                 }
 525         }
 526
 527         flist_free(dirlist);
 528 }
 529
 530 /* This deletes any files on the receiving side that are not present on the
 531  * sending side.  This is used by --delete-before and --delete-after. */
 532 static void do_delete_pass(void)
 533 {
 534         char fbuf[MAXPATHLEN];
 535         STRUCT_STAT st;
 536         int j;
 537
 538         /* dry_run is incremented when the destination doesn't exist yet. */
 539         if (dry_run > 1 || list_only)
 540                 return;
 541
 542         for (j = 0; j < cur_flist->used; j++) {
 543                 struct file_struct *file = cur_flist->sorted[j];
 544
 545                 f_name(file, fbuf);
 546
 547                 if (!(file->flags & FLAG_CONTENT_DIR)) {
 548                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(file));
 549                         continue;
 550                 }
 551
 552                 if (verbose > 1 && file->flags & FLAG_TOP_DIR)
 553                         rprintf(FINFO, "deleting in %s\n", fbuf);
 554
 555                 if (link_stat(fbuf, &st, keep_dirlinks) < 0
 556                  || !S_ISDIR(st.st_mode))
 557                         continue;
 558
 559                 delete_in_dir(fbuf, file, &st.st_dev);
 560         }
 561         delete_in_dir(NULL, NULL, &dev_zero);
 562
 563         if (do_progress && !am_server)
 564                 rprintf(FINFO, "                    \r");
 565 }
 566
 567 int unchanged_attrs(const char *fname, struct file_struct *file, stat_x *sxp)
 568 {
 569 #if !defined HAVE_LUTIMES || !defined HAVE_UTIMES
 570         if (S_ISLNK(file->mode)) {
 571                 ;
 572         } else
 573 #endif
 574         if (preserve_times && cmp_time(sxp->st.st_mtime, file->modtime) != 0)
 575                 return 0;
 576
 577         if (preserve_perms) {
 578                 if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
 579                         return 0;
 580         } else if (preserve_executability
 581          && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
 582                 return 0;
 583
 584         if (am_root && uid_ndx && sxp->st.st_uid != (uid_t)F_OWNER(file))
 585                 return 0;
 586
 587         if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP) && sxp->st.st_gid != (gid_t)F_GROUP(file))
 588                 return 0;
 589
 590 #ifdef SUPPORT_ACLS
 591         if (preserve_acls && !S_ISLNK(file->mode)) {
 592                 if (!ACL_READY(*sxp))
 593                         get_acl(fname, sxp);
 594                 if (set_acl(NULL, file, sxp) == 0)
 595                         return 0;
 596         }
 597 #endif
 598 #ifdef SUPPORT_XATTRS
 599         if (preserve_xattrs) {
 600                 if (!XATTR_READY(*sxp))
 601                         get_xattr(fname, sxp);
 602                 if (xattr_diff(file, sxp, 0))
 603                         return 0;
 604         }
 605 #endif
 606
 607         return 1;
 608 }
 609
 610 void itemize(const char *fnamecmp, struct file_struct *file, int ndx, int statret,
 611              stat_x *sxp, int32 iflags, uchar fnamecmp_type,
 612              const char *xname)
 613 {
 614         if (statret >= 0) { /* A from-dest-dir statret can == 1! */
 615                 int keep_time = !preserve_times ? 0
 616                     : S_ISDIR(file->mode) ? preserve_times > 1 :
 617 #if defined HAVE_LUTIMES && defined HAVE_UTIMES
 618                     1;
 619 #else
 620                     !S_ISLNK(file->mode);
 621 #endif
 622
 623                 if (S_ISREG(file->mode) && F_LENGTH(file) != sxp->st.st_size)
 624                         iflags |= ITEM_REPORT_SIZE;
 625                 if (file->flags & FLAG_TIME_FAILED) { /* symlinks only */
 626                         if (iflags & ITEM_LOCAL_CHANGE)
 627                                 iflags |= symlink_timeset_failed_flags;
 628                 } else if (keep_time
 629                  ? cmp_time(file->modtime, sxp->st.st_mtime) != 0
 630                  : iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !(iflags & ITEM_MATCHED)
 631                   && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
 632                         iflags |= ITEM_REPORT_TIME;
 633 #if !defined HAVE_LCHMOD && !defined HAVE_SETATTRLIST
 634                 if (S_ISLNK(file->mode)) {
 635                         ;
 636                 } else
 637 #endif
 638                 if (preserve_perms) {
 639                         if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
 640                                 iflags |= ITEM_REPORT_PERMS;
 641                 } else if (preserve_executability
 642                  && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
 643                         iflags |= ITEM_REPORT_PERMS;
 644                 if (uid_ndx && am_root && (uid_t)F_OWNER(file) != sxp->st.st_uid)
 645                         iflags |= ITEM_REPORT_OWNER;
 646                 if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP)
 647                     && sxp->st.st_gid != (gid_t)F_GROUP(file))
 648                         iflags |= ITEM_REPORT_GROUP;
 649 #ifdef SUPPORT_ACLS
 650                 if (preserve_acls && !S_ISLNK(file->mode)) {
 651                         if (!ACL_READY(*sxp))
 652                                 get_acl(fnamecmp, sxp);
 653                         if (set_acl(NULL, file, sxp) == 0)
 654                                 iflags |= ITEM_REPORT_ACL;
 655                 }
 656 #endif
 657 #ifdef SUPPORT_XATTRS
 658                 if (preserve_xattrs) {
 659                         if (!XATTR_READY(*sxp))
 660                                 get_xattr(fnamecmp, sxp);
 661                         if (xattr_diff(file, sxp, 1))
 662                                 iflags |= ITEM_REPORT_XATTR;
 663                 }
 664 #endif
 665         } else {
 666 #ifdef SUPPORT_XATTRS
 667                 if (preserve_xattrs && xattr_diff(file, NULL, 1))
 668                         iflags |= ITEM_REPORT_XATTR;
 669 #endif
 670                 iflags |= ITEM_IS_NEW;
 671         }
 672
 673         iflags &= 0xffff;
 674         if ((iflags & (SIGNIFICANT_ITEM_FLAGS|ITEM_REPORT_XATTR) || verbose > 1
 675           || stdout_format_has_i > 1 || (xname && *xname)) && !read_batch) {
 676                 if (protocol_version >= 29) {
 677                         if (ndx >= 0)
 678                                 write_ndx(sock_f_out, ndx);
 679                         write_shortint(sock_f_out, iflags);
 680                         if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
 681                                 write_byte(sock_f_out, fnamecmp_type);
 682                         if (iflags & ITEM_XNAME_FOLLOWS)
 683                                 write_vstring(sock_f_out, xname, strlen(xname));
 684 #ifdef SUPPORT_XATTRS
 685                         if (preserve_xattrs && do_xfers
 686                          && iflags & (ITEM_REPORT_XATTR|ITEM_TRANSFER)) {
 687                                 send_xattr_request(NULL, file,
 688                                         iflags & ITEM_REPORT_XATTR ? sock_f_out : -1);
 689                         }
 690 #endif
 691                 } else if (ndx >= 0) {
 692                         enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
 693                         log_item(code, file, &stats, iflags, xname);
 694                 }
 695         }
 696 }
 697
 698
 699 /* Perform our quick-check heuristic for determining if a file is unchanged. */
 700 int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
 701 {
 702         if (st->st_size != F_LENGTH(file))
 703                 return 0;
 704
 705         /* if always checksum is set then we use the checksum instead
 706            of the file time to determine whether to sync */
 707         if (always_checksum > 0 && S_ISREG(st->st_mode)) {
 708                 char sum[MAX_DIGEST_LEN];
 709                 file_checksum(fn, sum, st->st_size);
 710                 return memcmp(sum, F_SUM(file), checksum_len) == 0;
 711         }
 712
 713         if (size_only > 0)
 714                 return 1;
 715
 716         if (ignore_times)
 717                 return 0;
 718
 719         return cmp_time(st->st_mtime, file->modtime) == 0;
 720 }
 721
 722
 723 /*
 724  * set (initialize) the size entries in the per-file sum_struct
 725  * calculating dynamic block and checksum sizes.
 726  *
 727  * This is only called from generate_and_send_sums() but is a separate
 728  * function to encapsulate the logic.
 729  *
 730  * The block size is a rounded square root of file length.
 731  *
 732  * The checksum size is determined according to:
 733  *     blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
 734  * provided by Donovan Baarda which gives a probability of rsync
 735  * algorithm corrupting data and falling back using the whole md4
 736  * checksums.
 737  *
 738  * This might be made one of several selectable heuristics.
 739  */
 740 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
 741 {
 742         int32 blength;
 743         int s2length;
 744         int64 l;
 745
 746         if (len < 0) {
 747                 /* The file length overflowed our int64 var, so we can't process this file. */
 748                 sum->count = -1; /* indicate overflow error */
 749                 return;
 750         }
 751
 752         if (block_size)
 753                 blength = block_size;
 754         else if (len <= BLOCK_SIZE * BLOCK_SIZE)
 755                 blength = BLOCK_SIZE;
 756         else {
 757                 int32 max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE;
 758                 int32 c;
 759                 int cnt;
 760                 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
 761                 if (c < 0 || c >= max_blength)
 762                         blength = max_blength;
 763                 else {
 764                     blength = 0;
 765                     do {
 766                             blength |= c;
 767                             if (len < (int64)blength * blength)
 768                                     blength &= ~c;
 769                             c >>= 1;
 770                     } while (c >= 8);   /* round to multiple of 8 */
 771                     blength = MAX(blength, BLOCK_SIZE);
 772                 }
 773         }
 774
 775         if (protocol_version < 27) {
 776                 s2length = csum_length;
 777         } else if (csum_length == SUM_LENGTH) {
 778                 s2length = SUM_LENGTH;
 779         } else {
 780                 int32 c;
 781                 int b = BLOCKSUM_BIAS;
 782                 for (l = len; l >>= 1; b += 2) {}
 783                 for (c = blength; (c >>= 1) && b; b--) {}
 784                 /* add a bit, subtract rollsum, round up. */
 785                 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
 786                 s2length = MAX(s2length, csum_length);
 787                 s2length = MIN(s2length, SUM_LENGTH);
 788         }
 789
 790         sum->flength    = len;
 791         sum->blength    = blength;
 792         sum->s2length   = s2length;
 793         sum->remainder  = (int32)(len % blength);
 794         sum->count      = (int32)(l = (len / blength) + (sum->remainder != 0));
 795
 796         if ((int64)sum->count != l)
 797                 sum->count = -1;
 798
 799         if (sum->count && verbose > 2) {
 800                 rprintf(FINFO,
 801                         "count=%.0f rem=%ld blength=%ld s2length=%d flength=%.0f\n",
 802                         (double)sum->count, (long)sum->remainder, (long)sum->blength,
 803                         sum->s2length, (double)sum->flength);
 804         }
 805 }
 806
 807
 808 /*
 809  * Generate and send a stream of signatures/checksums that describe a buffer
 810  *
 811  * Generate approximately one checksum every block_len bytes.
 812  */
 813 static int generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
 814 {
 815         int32 i;
 816         struct map_struct *mapbuf;
 817         struct sum_struct sum;
 818         OFF_T offset = 0;
 819
 820         sum_sizes_sqroot(&sum, len);
 821         if (sum.count < 0)
 822                 return -1;
 823         write_sum_head(f_out, &sum);
 824
 825         if (append_mode > 0 && f_copy < 0)
 826                 return 0;
 827
 828         if (len > 0)
 829                 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
 830         else
 831                 mapbuf = NULL;
 832
 833         for (i = 0; i < sum.count; i++) {
 834                 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
 835                 char *map = map_ptr(mapbuf, offset, n1);
 836                 char sum2[SUM_LENGTH];
 837                 uint32 sum1;
 838
 839                 len -= n1;
 840                 offset += n1;
 841
 842                 if (f_copy >= 0) {
 843                         full_write(f_copy, map, n1);
 844                         if (append_mode > 0)
 845                                 continue;
 846                 }
 847
 848                 sum1 = get_checksum1(map, n1);
 849                 get_checksum2(map, n1, sum2);
 850
 851                 if (verbose > 3) {
 852                         rprintf(FINFO,
 853                                 "chunk[%.0f] offset=%.0f len=%ld sum1=%08lx\n",
 854                                 (double)i, (double)offset - n1, (long)n1,
 855                                 (unsigned long)sum1);
 856                 }
 857                 write_int(f_out, sum1);
 858                 write_buf(f_out, sum2, sum.s2length);
 859         }
 860
 861         if (mapbuf)
 862                 unmap_file(mapbuf);
 863
 864         return 0;
 865 }
 866
 867
 868 /* Try to find a filename in the same dir as "fname" with a similar name. */
 869 static int find_fuzzy(struct file_struct *file, struct file_list *dirlist)
 870 {
 871         int fname_len, fname_suf_len;
 872         const char *fname_suf, *fname = file->basename;
 873         uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
 874         int j, lowest_j = -1;
 875
 876         fname_len = strlen(fname);
 877         fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
 878
 879         for (j = 0; j < dirlist->used; j++) {
 880                 struct file_struct *fp = dirlist->files[j];
 881                 const char *suf, *name;
 882                 int len, suf_len;
 883                 uint32 dist;
 884
 885                 if (!S_ISREG(fp->mode) || !F_LENGTH(fp)
 886                  || fp->flags & FLAG_FILE_SENT)
 887                         continue;
 888
 889                 name = fp->basename;
 890
 891                 if (F_LENGTH(fp) == F_LENGTH(file)
 892                     && cmp_time(fp->modtime, file->modtime) == 0) {
 893                         if (verbose > 4) {
 894                                 rprintf(FINFO,
 895                                         "fuzzy size/modtime match for %s\n",
 896                                         name);
 897                         }
 898                         return j;
 899                 }
 900
 901                 len = strlen(name);
 902                 suf = find_filename_suffix(name, len, &suf_len);
 903
 904                 dist = fuzzy_distance(name, len, fname, fname_len);
 905                 /* Add some extra weight to how well the suffixes match. */
 906                 dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len)
 907                       * 10;
 908                 if (verbose > 4) {
 909                         rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
 910                                 name, (int)(dist>>16), (int)(dist&0xFFFF));
 911                 }
 912                 if (dist <= lowest_dist) {
 913                         lowest_dist = dist;
 914                         lowest_j = j;
 915                 }
 916         }
 917
 918         return lowest_j;
 919 }
 920
 921 /* Copy a file found in our --copy-dest handling. */
 922 static int copy_altdest_file(const char *src, const char *dest, struct file_struct *file)
 923 {
 924         char buf[MAXPATHLEN];
 925         const char *copy_to, *partialptr;
 926         int save_preserve_xattrs = preserve_xattrs;
 927         int ok, fd_w;
 928
 929         if (inplace) {
 930                 /* Let copy_file open the destination in place. */
 931                 fd_w = -1;
 932                 copy_to = dest;
 933         } else {
 934                 fd_w = open_tmpfile(buf, dest, file);
 935                 if (fd_w < 0)
 936                         return -1;
 937                 copy_to = buf;
 938         }
 939         cleanup_set(copy_to, NULL, NULL, -1, -1);
 940         if (copy_file(src, copy_to, fd_w, file->mode, 0) < 0) {
 941                 if (verbose) {
 942                         rsyserr(FINFO, errno, "copy_file %s => %s",
 943                                 full_fname(src), copy_to);
 944                 }
 945                 /* Try to clean up. */
 946                 unlink(copy_to);
 947                 cleanup_disable();
 948                 return -1;
 949         }
 950         partialptr = partial_dir ? partial_dir_fname(dest) : NULL;
 951         preserve_xattrs = 0; /* xattrs were copied with file */
 952         ok = finish_transfer(dest, copy_to, src, partialptr, file, 1, 0);
 953         preserve_xattrs = save_preserve_xattrs;
 954         cleanup_disable();
 955         return ok ? 0 : -1;
 956 }
 957
 958 /* This is only called for regular files.  We return -2 if we've finished
 959  * handling the file, -1 if no dest-linking occurred, or a non-negative
 960  * value if we found an alternate basis file. */
 961 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
 962                          char *cmpbuf, stat_x *sxp, int itemizing,
 963                          enum logcode code)
 964 {
 965         int best_match = -1;
 966         int match_level = 0;
 967         int j = 0;
 968
 969         do {
 970                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 971                 if (link_stat(cmpbuf, &sxp->st, 0) < 0 || !S_ISREG(sxp->st.st_mode))
 972                         continue;
 973                 switch (match_level) {
 974                 case 0:
 975                         best_match = j;
 976                         match_level = 1;
 977                         /* FALL THROUGH */
 978                 case 1:
 979                         if (!unchanged_file(cmpbuf, file, &sxp->st))
 980                                 continue;
 981                         best_match = j;
 982                         match_level = 2;
 983                         /* FALL THROUGH */
 984                 case 2:
 985                         if (!unchanged_attrs(cmpbuf, file, sxp))
 986                                 continue;
 987                         best_match = j;
 988                         match_level = 3;
 989                         break;
 990                 }
 991                 break;
 992         } while (basis_dir[++j] != NULL);
 993
 994         if (!match_level)
 995                 return -1;
 996
 997         if (j != best_match) {
 998                 j = best_match;
 999                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1000                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1001                         return -1;
1002         }
1003
1004         if (match_level == 3 && !copy_dest) {
1005 #ifdef SUPPORT_HARD_LINKS
1006                 if (link_dest) {
1007                         if (!hard_link_one(file, fname, cmpbuf, 1))
1008                                 goto try_a_copy;
1009                         if (preserve_hard_links && F_IS_HLINKED(file))
1010                                 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, j);
1011                         if (!maybe_ATTRS_REPORT && (verbose > 1 || stdout_format_has_i > 1)) {
1012                                 itemize(cmpbuf, file, ndx, 1, sxp,
1013                                         ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS,
1014                                         0, "");
1015                         }
1016                 } else
1017 #endif
1018                 if (itemizing)
1019                         itemize(cmpbuf, file, ndx, 0, sxp, 0, 0, NULL);
1020                 if (verbose > 1 && maybe_ATTRS_REPORT)
1021                         rprintf(FCLIENT, "%s is uptodate\n", fname);
1022                 return -2;
1023         }
1024
1025         if (match_level >= 2) {
1026 #ifdef SUPPORT_HARD_LINKS
1027           try_a_copy: /* Copy the file locally. */
1028 #endif
1029                 if (!dry_run && copy_altdest_file(cmpbuf, fname, file) < 0)
1030                         return -1;
1031                 if (itemizing)
1032                         itemize(cmpbuf, file, ndx, 0, sxp, ITEM_LOCAL_CHANGE, 0, NULL);
1033                 if (maybe_ATTRS_REPORT
1034                  && ((!itemizing && verbose && match_level == 2)
1035                   || (verbose > 1 && match_level == 3))) {
1036                         code = match_level == 3 ? FCLIENT : FINFO;
1037                         rprintf(code, "%s%s\n", fname,
1038                                 match_level == 3 ? " is uptodate" : "");
1039                 }
1040 #ifdef SUPPORT_HARD_LINKS
1041                 if (preserve_hard_links && F_IS_HLINKED(file))
1042                         finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, -1);
1043 #endif
1044                 return -2;
1045         }
1046
1047         return FNAMECMP_BASIS_DIR_LOW + j;
1048 }
1049
1050 /* This is only called for non-regular files.  We return -2 if we've finished
1051  * handling the file, or -1 if no dest-linking occurred, or a non-negative
1052  * value if we found an alternate basis file. */
1053 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
1054                          char *cmpbuf, stat_x *sxp, int itemizing,
1055                          enum logcode code)
1056 {
1057         char lnk[MAXPATHLEN];
1058         int best_match = -1;
1059         int match_level = 0;
1060         enum nonregtype type;
1061         uint32 *devp;
1062         int len, j = 0;
1063
1064 #ifndef SUPPORT_LINKS
1065         if (S_ISLNK(file->mode))
1066                 return -1;
1067 #endif
1068         if (S_ISDIR(file->mode)) {
1069                 type = TYPE_DIR;
1070         } else if (IS_SPECIAL(file->mode))
1071                 type = TYPE_SPECIAL;
1072         else if (IS_DEVICE(file->mode))
1073                 type = TYPE_DEVICE;
1074 #ifdef SUPPORT_LINKS
1075         else if (S_ISLNK(file->mode))
1076                 type = TYPE_SYMLINK;
1077 #endif
1078         else {
1079                 rprintf(FERROR,
1080                         "internal: try_dests_non() called with invalid mode (%o)\n",
1081                         (int)file->mode);
1082                 exit_cleanup(RERR_UNSUPPORTED);
1083         }
1084
1085         do {
1086                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1087                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1088                         continue;
1089                 switch (type) {
1090                 case TYPE_DIR:
1091                         if (!S_ISDIR(sxp->st.st_mode))
1092                                 continue;
1093                         break;
1094                 case TYPE_SPECIAL:
1095                         if (!IS_SPECIAL(sxp->st.st_mode))
1096                                 continue;
1097                         break;
1098                 case TYPE_DEVICE:
1099                         if (!IS_DEVICE(sxp->st.st_mode))
1100                                 continue;
1101                         break;
1102 #ifdef SUPPORT_LINKS
1103                 case TYPE_SYMLINK:
1104                         if (!S_ISLNK(sxp->st.st_mode))
1105                                 continue;
1106                         break;
1107 #endif
1108                 }
1109                 if (match_level < 1) {
1110                         match_level = 1;
1111                         best_match = j;
1112                 }
1113                 switch (type) {
1114                 case TYPE_DIR:
1115                 case TYPE_SPECIAL:
1116                         break;
1117                 case TYPE_DEVICE:
1118                         devp = F_RDEV_P(file);
1119                         if (sxp->st.st_rdev != MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)))
1120                                 continue;
1121                         break;
1122 #ifdef SUPPORT_LINKS
1123                 case TYPE_SYMLINK:
1124                         if ((len = readlink(cmpbuf, lnk, MAXPATHLEN-1)) <= 0)
1125                                 continue;
1126                         lnk[len] = '\0';
1127                         if (strcmp(lnk, F_SYMLINK(file)) != 0)
1128                                 continue;
1129                         break;
1130 #endif
1131                 }
1132                 if (match_level < 2) {
1133                         match_level = 2;
1134                         best_match = j;
1135                 }
1136                 if (unchanged_attrs(cmpbuf, file, sxp)) {
1137                         match_level = 3;
1138                         best_match = j;
1139                         break;
1140                 }
1141         } while (basis_dir[++j] != NULL);
1142
1143         if (!match_level)
1144                 return -1;
1145
1146         if (j != best_match) {
1147                 j = best_match;
1148                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1149                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1150                         return -1;
1151         }
1152
1153         if (match_level == 3) {
1154 #ifdef SUPPORT_HARD_LINKS
1155                 if (link_dest
1156 #ifndef CAN_HARDLINK_SYMLINK
1157                  && !S_ISLNK(file->mode)
1158 #endif
1159 #ifndef CAN_HARDLINK_SPECIAL
1160                  && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
1161 #endif
1162                  && !S_ISDIR(file->mode)) {
1163                         if (do_link(cmpbuf, fname) < 0) {
1164                                 rsyserr(FERROR_XFER, errno,
1165                                         "failed to hard-link %s with %s",
1166                                         cmpbuf, fname);
1167                                 return j;
1168                         }
1169                         if (preserve_hard_links && F_IS_HLINKED(file))
1170                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1171                 } else
1172 #endif
1173                         match_level = 2;
1174                 if (itemizing && stdout_format_has_i
1175                  && (verbose > 1 || stdout_format_has_i > 1)) {
1176                         int chg = compare_dest && type != TYPE_DIR ? 0
1177                             : ITEM_LOCAL_CHANGE + (match_level == 3 ? ITEM_XNAME_FOLLOWS : 0);
1178                         char *lp = match_level == 3 ? "" : NULL;
1179                         itemize(cmpbuf, file, ndx, 0, sxp, chg + ITEM_MATCHED, 0, lp);
1180                 }
1181                 if (verbose > 1 && maybe_ATTRS_REPORT) {
1182                         rprintf(FCLIENT, "%s%s is uptodate\n",
1183                                 fname, type == TYPE_DIR ? "/" : "");
1184                 }
1185                 return -2;
1186         }
1187
1188         return j;
1189 }
1190
1191 static void list_file_entry(struct file_struct *f)
1192 {
1193         char permbuf[PERMSTRING_SIZE];
1194         double len;
1195
1196         if (!F_IS_ACTIVE(f)) {
1197                 /* this can happen if duplicate names were removed */
1198                 return;
1199         }
1200
1201         permstring(permbuf, f->mode);
1202         len = F_LENGTH(f);
1203
1204         /* TODO: indicate '+' if the entry has an ACL. */
1205
1206 #ifdef SUPPORT_LINKS
1207         if (preserve_links && S_ISLNK(f->mode)) {
1208                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
1209                         permbuf, len, timestring(f->modtime),
1210                         f_name(f, NULL), F_SYMLINK(f));
1211         } else
1212 #endif
1213         {
1214                 rprintf(FINFO, "%s %11.0f %s %s\n",
1215                         permbuf, len, timestring(f->modtime),
1216                         f_name(f, NULL));
1217         }
1218 }
1219
1220 static int phase = 0;
1221 static int dflt_perms;
1222
1223 static int implied_dirs_are_missing;
1224 /* Helper for recv_generator's skip_dir and dry_missing_dir tests. */
1225 static BOOL is_below(struct file_struct *file, struct file_struct *subtree)
1226 {
1227         return F_DEPTH(file) > F_DEPTH(subtree)
1228                 && (!implied_dirs_are_missing || f_name_has_prefix(file, subtree));
1229 }
1230
1231 /* Acts on the indicated item in cur_flist whose name is fname.  If a dir,
1232  * make sure it exists, and has the right permissions/timestamp info.  For
1233  * all other non-regular files (symlinks, etc.) we create them here.  For
1234  * regular files that have changed, we try to find a basis file and then
1235  * start sending checksums.  The ndx is the file's unique index value.
1236  *
1237  * The fname parameter must point to a MAXPATHLEN buffer!  (e.g it gets
1238  * passed to delete_item(), which can use it during a recursive delete.)
1239  *
1240  * Note that f_out is set to -1 when doing final directory-permission and
1241  * modification-time repair. */
1242 static void recv_generator(char *fname, struct file_struct *file, int ndx,
1243                            int itemizing, enum logcode code, int f_out)
1244 {
1245         static const char *parent_dirname = "";
1246         /* Missing dir not created due to --dry-run; will still be scanned. */
1247         static struct file_struct *dry_missing_dir = NULL;
1248         /* Missing dir whose contents are skipped altogether due to
1249          * --ignore-non-existing, daemon exclude, or mkdir failure. */
1250         static struct file_struct *skip_dir = NULL;
1251         static struct file_list *fuzzy_dirlist = NULL;
1252         static int need_fuzzy_dirlist = 0;
1253         struct file_struct *fuzzy_file = NULL;
1254         int fd = -1, f_copy = -1;
1255         stat_x sx, real_sx;
1256         STRUCT_STAT partial_st;
1257         struct file_struct *back_file = NULL;
1258         int statret, real_ret, stat_errno;
1259         char *fnamecmp, *partialptr, *backupptr = NULL;
1260         char fnamecmpbuf[MAXPATHLEN];
1261         uchar fnamecmp_type;
1262         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1263         int is_dir = !S_ISDIR(file->mode) ? 0
1264                    : inc_recurse && ndx != cur_flist->ndx_start - 1 ? -1
1265                    : 1;
1266
1267         if (verbose > 2)
1268                 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
1269
1270         if (list_only) {
1271                 if (is_dir < 0
1272                  || (is_dir && !implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1273                         return;
1274                 list_file_entry(file);
1275                 return;
1276         }
1277
1278         if (skip_dir) {
1279                 if (is_below(file, skip_dir)) {
1280                         if (is_dir)
1281                                 file->flags |= FLAG_MISSING_DIR;
1282 #ifdef SUPPORT_HARD_LINKS
1283                         else if (F_IS_HLINKED(file))
1284                                 handle_skipped_hlink(file, itemizing, code, f_out);
1285 #endif
1286                         return;
1287                 }
1288                 skip_dir = NULL;
1289         }
1290
1291 #ifdef SUPPORT_ACLS
1292         sx.acc_acl = sx.def_acl = NULL;
1293 #endif
1294 #ifdef SUPPORT_XATTRS
1295         sx.xattr = NULL;
1296 #endif
1297         if (daemon_filter_list.head && (*fname != '.' || fname[1])) {
1298                 if (check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
1299                         if (is_dir < 0)
1300                                 return;
1301 #ifdef SUPPORT_HARD_LINKS
1302                         if (F_IS_HLINKED(file))
1303                                 handle_skipped_hlink(file, itemizing, code, f_out);
1304 #endif
1305                         rprintf(FERROR_XFER,
1306                                 "skipping daemon-excluded %s \"%s\"\n",
1307                                 is_dir ? "directory" : "file", fname);
1308                         if (is_dir)
1309                                 goto skipping_dir_contents;
1310                         return;
1311                 }
1312         }
1313
1314         if (dry_run > 1 || (dry_missing_dir && is_below(file, dry_missing_dir))) {
1315           parent_is_dry_missing:
1316                 if (fuzzy_dirlist) {
1317                         flist_free(fuzzy_dirlist);
1318                         fuzzy_dirlist = NULL;
1319                 }
1320                 parent_dirname = "";
1321                 statret = -1;
1322                 stat_errno = ENOENT;
1323         } else {
1324                 const char *dn = file->dirname ? file->dirname : ".";
1325                 dry_missing_dir = NULL;
1326                 if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
1327                         if (relative_paths && !implied_dirs
1328                          && do_stat(dn, &sx.st) < 0) {
1329                                 if (dry_run)
1330                                         goto parent_is_dry_missing;
1331                                 if (create_directory_path(fname) < 0) {
1332                                         rsyserr(FERROR_XFER, errno,
1333                                                 "recv_generator: mkdir %s failed",
1334                                                 full_fname(dn));
1335                                 }
1336                         }
1337                         if (fuzzy_dirlist) {
1338                                 flist_free(fuzzy_dirlist);
1339                                 fuzzy_dirlist = NULL;
1340                         }
1341                         if (fuzzy_basis)
1342                                 need_fuzzy_dirlist = 1;
1343 #ifdef SUPPORT_ACLS
1344                         if (!preserve_perms)
1345                                 dflt_perms = default_perms_for_dir(dn);
1346 #endif
1347                 }
1348                 parent_dirname = dn;
1349
1350                 if (need_fuzzy_dirlist && S_ISREG(file->mode)) {
1351                         strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf);
1352                         fuzzy_dirlist = get_dirlist(fnamecmpbuf, -1, GDL_IGNORE_FILTER_RULES);
1353                         need_fuzzy_dirlist = 0;
1354                 }
1355
1356                 statret = link_stat(fname, &sx.st, keep_dirlinks && is_dir);
1357                 stat_errno = errno;
1358         }
1359
1360         if (ignore_non_existing > 0 && statret == -1 && stat_errno == ENOENT) {
1361                 if (is_dir) {
1362                         if (is_dir < 0)
1363                                 return;
1364                         skip_dir = file;
1365                         file->flags |= FLAG_MISSING_DIR;
1366                 }
1367 #ifdef SUPPORT_HARD_LINKS
1368                 else if (F_IS_HLINKED(file))
1369                         handle_skipped_hlink(file, itemizing, code, f_out);
1370 #endif
1371                 if (verbose > 1) {
1372                         rprintf(FINFO, "not creating new %s \"%s\"\n",
1373                                 is_dir ? "directory" : "file", fname);
1374                 }
1375                 return;
1376         }
1377
1378         if (statret == 0 && !(sx.st.st_mode & S_IWUSR)
1379          && !am_root && sx.st.st_uid == our_uid)
1380                 del_opts |= DEL_NO_UID_WRITE;
1381
1382         if (ignore_existing > 0 && statret == 0
1383          && (!is_dir || !S_ISDIR(sx.st.st_mode))) {
1384                 if (verbose > 1 && is_dir >= 0)
1385                         rprintf(FINFO, "%s exists\n", fname);
1386 #ifdef SUPPORT_HARD_LINKS
1387                 if (F_IS_HLINKED(file))
1388                         handle_skipped_hlink(file, itemizing, code, f_out);
1389 #endif
1390                 goto cleanup;
1391         }
1392
1393         fnamecmp = fname;
1394
1395         if (is_dir) {
1396                 mode_t added_perms;
1397                 if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
1398                         goto cleanup;
1399                 if (am_root < 0) {
1400                         /* For --fake-super, the dir must be useable by the copying
1401                          * user, just like it would be for root. */
1402                         added_perms = S_IRUSR|S_IWUSR|S_IXUSR;
1403                 } else
1404                         added_perms = 0;
1405                 if (is_dir < 0) {
1406                         /* In inc_recurse mode we want to make sure any missing
1407                          * directories get created while we're still processing
1408                          * the parent dir (which allows us to touch the parent
1409                          * dir's mtime right away).  We will handle the dir in
1410                          * full later (right before we handle its contents). */
1411                         if (statret == 0
1412                          && (S_ISDIR(sx.st.st_mode)
1413                           || delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0))
1414                                 goto cleanup; /* Any errors get reported later. */
1415                         if (do_mkdir(fname, (file->mode|added_perms) & 0700) == 0)
1416                                 file->flags |= FLAG_DIR_CREATED;
1417                         goto cleanup;
1418                 }
1419                 /* The file to be received is a directory, so we need
1420                  * to prepare appropriately.  If there is already a
1421                  * file of that name and it is *not* a directory, then
1422                  * we need to delete it.  If it doesn't exist, then
1423                  * (perhaps recursively) create it. */
1424                 if (statret == 0 && !S_ISDIR(sx.st.st_mode)) {
1425                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0)
1426                                 goto skipping_dir_contents;
1427                         statret = -1;
1428                 }
1429                 if (dry_run && statret != 0) {
1430                         if (!dry_missing_dir)
1431                                 dry_missing_dir = file;
1432                         file->flags |= FLAG_MISSING_DIR;
1433                 }
1434                 real_ret = statret;
1435                 real_sx = sx;
1436                 if (file->flags & FLAG_DIR_CREATED)
1437                         statret = -1;
1438                 if (!preserve_perms) { /* See comment in non-dir code below. */
1439                         file->mode = dest_mode(file->mode, sx.st.st_mode,
1440                                                dflt_perms, statret == 0);
1441                 }
1442                 if (statret != 0 && basis_dir[0] != NULL) {
1443                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1444                                               itemizing, code);
1445                         if (j == -2) {
1446                                 itemizing = 0;
1447                                 code = FNONE;
1448                                 statret = 1;
1449                         } else if (j >= 0) {
1450                                 statret = 1;
1451                                 fnamecmp = fnamecmpbuf;
1452                         }
1453                 }
1454                 if (itemizing && f_out != -1) {
1455                         itemize(fnamecmp, file, ndx, statret, &sx,
1456                                 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
1457                 }
1458                 if (real_ret != 0 && do_mkdir(fname,file->mode|added_perms) < 0 && errno != EEXIST) {
1459                         if (!relative_paths || errno != ENOENT
1460                          || create_directory_path(fname) < 0
1461                          || (do_mkdir(fname, file->mode|added_perms) < 0 && errno != EEXIST)) {
1462                                 rsyserr(FERROR_XFER, errno,
1463                                         "recv_generator: mkdir %s failed",
1464                                         full_fname(fname));
1465                           skipping_dir_contents:
1466                                 rprintf(FERROR,
1467                                     "*** Skipping any contents from this failed directory ***\n");
1468                                 skip_dir = file;
1469                                 file->flags |= FLAG_MISSING_DIR;
1470                                 goto cleanup;
1471                         }
1472                 }
1473 #ifdef SUPPORT_XATTRS
1474                 if (preserve_xattrs && statret == 1)
1475                         copy_xattrs(fnamecmpbuf, fname);
1476 #endif
1477                 if (set_file_attrs(fname, file, real_ret ? NULL : &real_sx, NULL, 0)
1478                     && verbose && code != FNONE && f_out != -1)
1479                         rprintf(code, "%s/\n", fname);
1480
1481                 /* We need to ensure that the dirs in the transfer have writable
1482                  * permissions during the time we are putting files within them.
1483                  * This is then fixed after the transfer is done. */
1484 #ifdef HAVE_CHMOD
1485                 if (!am_root && !(file->mode & S_IWUSR) && dir_tweaking) {
1486                         mode_t mode = file->mode | S_IWUSR;
1487                         if (do_chmod(fname, mode) < 0) {
1488                                 rsyserr(FERROR_XFER, errno,
1489                                         "failed to modify permissions on %s",
1490                                         full_fname(fname));
1491                         }
1492                         need_retouch_dir_perms = 1;
1493                 }
1494 #endif
1495
1496                 if (real_ret != 0 && one_file_system)
1497                         real_sx.st.st_dev = filesystem_dev;
1498                 if (inc_recurse) {
1499                         if (one_file_system) {
1500                                 uint32 *devp = F_DIR_DEV_P(file);
1501                                 DEV_MAJOR(devp) = major(real_sx.st.st_dev);
1502                                 DEV_MINOR(devp) = minor(real_sx.st.st_dev);
1503                         }
1504                 }
1505                 else if (delete_during && f_out != -1 && !phase
1506                     && !(file->flags & FLAG_MISSING_DIR)) {
1507                         if (file->flags & FLAG_CONTENT_DIR)
1508                                 delete_in_dir(fname, file, &real_sx.st.st_dev);
1509                         else
1510                                 change_local_filter_dir(fname, strlen(fname), F_DEPTH(file));
1511                 }
1512                 goto cleanup;
1513         }
1514
1515         /* If we're not preserving permissions, change the file-list's
1516          * mode based on the local permissions and some heuristics. */
1517         if (!preserve_perms) {
1518                 int exists = statret == 0 && !S_ISDIR(sx.st.st_mode);
1519                 file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms,
1520                                        exists);
1521         }
1522
1523 #ifdef SUPPORT_HARD_LINKS
1524         if (preserve_hard_links && F_HLINK_NOT_FIRST(file)
1525          && hard_link_check(file, ndx, fname, statret, &sx, itemizing, code))
1526                 goto cleanup;
1527 #endif
1528
1529         if (preserve_links && S_ISLNK(file->mode)) {
1530 #ifdef SUPPORT_LINKS
1531                 const char *sl = F_SYMLINK(file);
1532                 if (safe_symlinks && unsafe_symlink(sl, fname)) {
1533                         if (verbose) {
1534                                 if (solo_file) {
1535                                         /* fname contains the destination path, but we
1536                                          * want to report the source path. */
1537                                         fname = f_name(file, NULL);
1538                                 }
1539                                 rprintf(FINFO,
1540                                         "ignoring unsafe symlink \"%s\" -> \"%s\"\n",
1541                                         fname, sl);
1542                         }
1543                         return;
1544                 }
1545                 if (statret == 0) {
1546                         char lnk[MAXPATHLEN];
1547                         int len;
1548
1549                         if (!S_ISLNK(sx.st.st_mode))
1550                                 statret = -1;
1551                         else if ((len = readlink(fname, lnk, MAXPATHLEN-1)) > 0
1552                               && strncmp(lnk, sl, len) == 0 && sl[len] == '\0') {
1553                                 /* The link is pointing to the right place. */
1554                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1555                                 if (itemizing)
1556                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1557 #if defined SUPPORT_HARD_LINKS && defined CAN_HARDLINK_SYMLINK
1558                                 if (preserve_hard_links && F_IS_HLINKED(file))
1559                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1560 #endif
1561                                 if (remove_source_files == 1)
1562                                         goto return_with_success;
1563                                 goto cleanup;
1564                         }
1565                         /* Not the right symlink (or not a symlink), so
1566                          * delete it. */
1567                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_SYMLINK) != 0)
1568                                 goto cleanup;
1569                 } else if (basis_dir[0] != NULL) {
1570                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1571                                               itemizing, code);
1572                         if (j == -2) {
1573 #ifndef CAN_HARDLINK_SYMLINK
1574                                 if (link_dest) {
1575                                         /* Resort to --copy-dest behavior. */
1576                                 } else
1577 #endif
1578                                 if (!copy_dest)
1579                                         goto cleanup;
1580                                 itemizing = 0;
1581                                 code = FNONE;
1582                         } else if (j >= 0)
1583                                 statret = 1;
1584                 }
1585 #ifdef SUPPORT_HARD_LINKS
1586                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1587                         cur_flist->in_progress++;
1588                         goto cleanup;
1589                 }
1590 #endif
1591                 if (do_symlink(sl, fname) != 0) {
1592                         rsyserr(FERROR_XFER, errno, "symlink %s -> \"%s\" failed",
1593                                 full_fname(fname), sl);
1594                 } else {
1595                         set_file_attrs(fname, file, NULL, NULL, 0);
1596                         if (itemizing) {
1597                                 itemize(fname, file, ndx, statret, &sx,
1598                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1599                         }
1600                         if (code != FNONE && verbose)
1601                                 rprintf(code, "%s -> %s\n", fname, sl);
1602 #ifdef SUPPORT_HARD_LINKS
1603                         if (preserve_hard_links && F_IS_HLINKED(file))
1604                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1605 #endif
1606                         /* This does not check remove_source_files == 1
1607                          * because this is one of the items that the old
1608                          * --remove-sent-files option would remove. */
1609                         if (remove_source_files)
1610                                 goto return_with_success;
1611                 }
1612 #endif
1613                 goto cleanup;
1614         }
1615
1616         if ((am_root && preserve_devices && IS_DEVICE(file->mode))
1617          || (preserve_specials && IS_SPECIAL(file->mode))) {
1618                 dev_t rdev;
1619                 if (IS_DEVICE(file->mode)) {
1620                         uint32 *devp = F_RDEV_P(file);
1621                         rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
1622                 } else
1623                         rdev = 0;
1624                 if (statret == 0) {
1625                         int del_for_flag;
1626                         if (IS_DEVICE(file->mode)) {
1627                                 if (!IS_DEVICE(sx.st.st_mode))
1628                                         statret = -1;
1629                                 del_for_flag = DEL_FOR_DEVICE;
1630                         } else {
1631                                 if (!IS_SPECIAL(sx.st.st_mode))
1632                                         statret = -1;
1633                                 del_for_flag = DEL_FOR_SPECIAL;
1634                         }
1635                         if (statret == 0
1636                          && BITS_EQUAL(sx.st.st_mode, file->mode, _S_IFMT)
1637                          && (IS_SPECIAL(sx.st.st_mode) || sx.st.st_rdev == rdev)) {
1638                                 /* The device or special file is identical. */
1639                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1640                                 if (itemizing)
1641                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1642 #ifdef SUPPORT_HARD_LINKS
1643                                 if (preserve_hard_links && F_IS_HLINKED(file))
1644                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1645 #endif
1646                                 if (remove_source_files == 1)
1647                                         goto return_with_success;
1648                                 goto cleanup;
1649                         }
1650                         if (delete_item(fname, sx.st.st_mode, del_opts | del_for_flag) != 0)
1651                                 goto cleanup;
1652                 } else if (basis_dir[0] != NULL) {
1653                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1654                                               itemizing, code);
1655                         if (j == -2) {
1656 #ifndef CAN_HARDLINK_SPECIAL
1657                                 if (link_dest) {
1658                                         /* Resort to --copy-dest behavior. */
1659                                 } else
1660 #endif
1661                                 if (!copy_dest)
1662                                         goto cleanup;
1663                                 itemizing = 0;
1664                                 code = FNONE;
1665                         } else if (j >= 0)
1666                                 statret = 1;
1667                 }
1668 #ifdef SUPPORT_HARD_LINKS
1669                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1670                         cur_flist->in_progress++;
1671                         goto cleanup;
1672                 }
1673 #endif
1674                 if (verbose > 2) {
1675                         rprintf(FINFO, "mknod(%s, 0%o, [%ld,%ld])\n",
1676                                 fname, (int)file->mode,
1677                                 (long)major(rdev), (long)minor(rdev));
1678                 }
1679                 if (do_mknod(fname, file->mode, rdev) < 0) {
1680                         rsyserr(FERROR_XFER, errno, "mknod %s failed",
1681                                 full_fname(fname));
1682                 } else {
1683                         set_file_attrs(fname, file, NULL, NULL, 0);
1684                         if (itemizing) {
1685                                 itemize(fname, file, ndx, statret, &sx,
1686                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1687                         }
1688                         if (code != FNONE && verbose)
1689                                 rprintf(code, "%s\n", fname);
1690 #ifdef SUPPORT_HARD_LINKS
1691                         if (preserve_hard_links && F_IS_HLINKED(file))
1692                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1693 #endif
1694                         if (remove_source_files == 1)
1695                                 goto return_with_success;
1696                 }
1697                 goto cleanup;
1698         }
1699
1700         if (!S_ISREG(file->mode)) {
1701                 if (solo_file)
1702                         fname = f_name(file, NULL);
1703                 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1704                 goto cleanup;
1705         }
1706
1707         if (max_size > 0 && F_LENGTH(file) > max_size) {
1708                 if (verbose > 1) {
1709                         if (solo_file)
1710                                 fname = f_name(file, NULL);
1711                         rprintf(FINFO, "%s is over max-size\n", fname);
1712                 }
1713                 goto cleanup;
1714         }
1715         if (min_size > 0 && F_LENGTH(file) < min_size) {
1716                 if (verbose > 1) {
1717                         if (solo_file)
1718                                 fname = f_name(file, NULL);
1719                         rprintf(FINFO, "%s is under min-size\n", fname);
1720                 }
1721                 goto cleanup;
1722         }
1723
1724         if (update_only > 0 && statret == 0
1725             && cmp_time(sx.st.st_mtime, file->modtime) > 0) {
1726                 if (verbose > 1)
1727                         rprintf(FINFO, "%s is newer\n", fname);
1728 #ifdef SUPPORT_HARD_LINKS
1729                 if (F_IS_HLINKED(file))
1730                         handle_skipped_hlink(file, itemizing, code, f_out);
1731 #endif
1732                 goto cleanup;
1733         }
1734
1735         fnamecmp_type = FNAMECMP_FNAME;
1736
1737         if (statret == 0 && !S_ISREG(sx.st.st_mode)) {
1738                 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_FILE) != 0)
1739                         goto cleanup;
1740                 statret = -1;
1741                 stat_errno = ENOENT;
1742         }
1743
1744         if (statret != 0 && basis_dir[0] != NULL) {
1745                 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &sx,
1746                                       itemizing, code);
1747                 if (j == -2) {
1748                         if (remove_source_files == 1)
1749                                 goto return_with_success;
1750                         goto cleanup;
1751                 }
1752                 if (j >= 0) {
1753                         fnamecmp = fnamecmpbuf;
1754                         fnamecmp_type = j;
1755                         statret = 0;
1756                 }
1757         }
1758
1759         real_ret = statret;
1760         real_sx = sx;
1761
1762         if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1763             && link_stat(partialptr, &partial_st, 0) == 0
1764             && S_ISREG(partial_st.st_mode)) {
1765                 if (statret != 0)
1766                         goto prepare_to_open;
1767         } else
1768                 partialptr = NULL;
1769
1770         if (statret != 0 && fuzzy_dirlist) {
1771                 int j = find_fuzzy(file, fuzzy_dirlist);
1772                 if (j >= 0) {
1773                         fuzzy_file = fuzzy_dirlist->files[j];
1774                         f_name(fuzzy_file, fnamecmpbuf);
1775                         if (verbose > 2) {
1776                                 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1777                                         fname, fnamecmpbuf);
1778                         }
1779                         sx.st.st_size = F_LENGTH(fuzzy_file);
1780                         statret = 0;
1781                         fnamecmp = fnamecmpbuf;
1782                         fnamecmp_type = FNAMECMP_FUZZY;
1783                 }
1784         }
1785
1786         if (statret != 0) {
1787 #ifdef SUPPORT_HARD_LINKS
1788                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1789                         cur_flist->in_progress++;
1790                         goto cleanup;
1791                 }
1792 #endif
1793                 if (stat_errno == ENOENT)
1794                         goto notify_others;
1795                 rsyserr(FERROR_XFER, stat_errno, "recv_generator: failed to stat %s",
1796                         full_fname(fname));
1797                 goto cleanup;
1798         }
1799
1800         if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1801                 ;
1802         else if (fnamecmp_type == FNAMECMP_FUZZY)
1803                 ;
1804         else if (unchanged_file(fnamecmp, file, &sx.st)) {
1805                 if (partialptr) {
1806                         do_unlink(partialptr);
1807                         handle_partial_dir(partialptr, PDIR_DELETE);
1808                 }
1809                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1810                 if (itemizing)
1811                         itemize(fnamecmp, file, ndx, statret, &sx, 0, 0, NULL);
1812 #ifdef SUPPORT_HARD_LINKS
1813                 if (preserve_hard_links && F_IS_HLINKED(file))
1814                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1815 #endif
1816                 if (remove_source_files != 1)
1817                         goto cleanup;
1818           return_with_success:
1819                 if (!dry_run)
1820                         send_msg_int(MSG_SUCCESS, ndx);
1821                 goto cleanup;
1822         }
1823
1824         if (append_mode > 0 && sx.st.st_size >= F_LENGTH(file)) {
1825 #ifdef SUPPORT_HARD_LINKS
1826                 if (F_IS_HLINKED(file))
1827                         handle_skipped_hlink(file, itemizing, code, f_out);
1828 #endif
1829                 goto cleanup;
1830         }
1831
1832   prepare_to_open:
1833         if (partialptr) {
1834                 sx.st = partial_st;
1835                 fnamecmp = partialptr;
1836                 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1837                 statret = 0;
1838         }
1839
1840         if (!do_xfers)
1841                 goto notify_others;
1842
1843         if (read_batch || whole_file) {
1844                 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1845                         if (!(backupptr = get_backup_name(fname)))
1846                                 goto cleanup;
1847                         if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
1848                                 goto pretend_missing;
1849                         if (copy_file(fname, backupptr, -1, back_file->mode, 1) < 0) {
1850                                 unmake_file(back_file);
1851                                 back_file = NULL;
1852                                 goto cleanup;
1853                         }
1854                 }
1855                 goto notify_others;
1856         }
1857
1858         if (fuzzy_dirlist) {
1859                 int j = flist_find(fuzzy_dirlist, file);
1860                 if (j >= 0) /* don't use changing file as future fuzzy basis */
1861                         fuzzy_dirlist->files[j]->flags |= FLAG_FILE_SENT;
1862         }
1863
1864         /* open the file */
1865         if ((fd = do_open(fnamecmp, O_RDONLY, 0)) < 0) {
1866                 rsyserr(FERROR, errno, "failed to open %s, continuing",
1867                         full_fname(fnamecmp));
1868           pretend_missing:
1869                 /* pretend the file didn't exist */
1870 #ifdef SUPPORT_HARD_LINKS
1871                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1872                         cur_flist->in_progress++;
1873                         goto cleanup;
1874                 }
1875 #endif
1876                 statret = real_ret = -1;
1877                 goto notify_others;
1878         }
1879
1880         if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1881                 if (!(backupptr = get_backup_name(fname))) {
1882                         close(fd);
1883                         goto cleanup;
1884                 }
1885                 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1886                         close(fd);
1887                         goto pretend_missing;
1888                 }
1889                 if (robust_unlink(backupptr) && errno != ENOENT) {
1890                         rsyserr(FERROR_XFER, errno, "unlink %s",
1891                                 full_fname(backupptr));
1892                         unmake_file(back_file);
1893                         back_file = NULL;
1894                         close(fd);
1895                         goto cleanup;
1896                 }
1897                 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1898                         int save_errno = errno ? errno : EINVAL; /* 0 paranoia */
1899                         if (errno == ENOENT && make_bak_dir(backupptr) == 0) {
1900                                 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0)
1901                                         save_errno = errno ? errno : save_errno;
1902                                 else
1903                                         save_errno = 0;
1904                         }
1905                         if (save_errno) {
1906                                 rsyserr(FERROR_XFER, save_errno, "open %s", full_fname(backupptr));
1907                                 unmake_file(back_file);
1908                                 back_file = NULL;
1909                                 close(fd);
1910                                 goto cleanup;
1911                         }
1912                 }
1913                 fnamecmp_type = FNAMECMP_BACKUP;
1914         }
1915
1916         if (verbose > 3) {
1917                 rprintf(FINFO, "gen mapped %s of size %.0f\n",
1918                         fnamecmp, (double)sx.st.st_size);
1919         }
1920
1921         if (verbose > 2)
1922                 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1923
1924   notify_others:
1925         if (remove_source_files && !delay_updates && !phase && !dry_run)
1926                 increment_active_files(ndx, itemizing, code);
1927         if (inc_recurse && !dry_run)
1928                 cur_flist->in_progress++;
1929 #ifdef SUPPORT_HARD_LINKS
1930         if (preserve_hard_links && F_IS_HLINKED(file))
1931                 file->flags |= FLAG_FILE_SENT;
1932 #endif
1933         write_ndx(f_out, ndx);
1934         if (itemizing) {
1935                 int iflags = ITEM_TRANSFER;
1936                 if (always_checksum > 0)
1937                         iflags |= ITEM_REPORT_CHANGE;
1938                 if (fnamecmp_type != FNAMECMP_FNAME)
1939                         iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1940                 if (fnamecmp_type == FNAMECMP_FUZZY)
1941                         iflags |= ITEM_XNAME_FOLLOWS;
1942                 itemize(fnamecmp, file, -1, real_ret, &real_sx, iflags, fnamecmp_type,
1943                         fuzzy_file ? fuzzy_file->basename : NULL);
1944 #ifdef SUPPORT_ACLS
1945                 if (preserve_acls)
1946                         free_acl(&real_sx);
1947 #endif
1948 #ifdef SUPPORT_XATTRS
1949                 if (preserve_xattrs)
1950                         free_xattr(&real_sx);
1951 #endif
1952         }
1953
1954         if (!do_xfers) {
1955 #ifdef SUPPORT_HARD_LINKS
1956                 if (preserve_hard_links && F_IS_HLINKED(file))
1957                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1958 #endif
1959                 goto cleanup;
1960         }
1961         if (read_batch)
1962                 goto cleanup;
1963
1964         if (statret != 0 || whole_file)
1965                 write_sum_head(f_out, NULL);
1966         else if (sx.st.st_size <= 0) {
1967                 write_sum_head(f_out, NULL);
1968                 close(fd);
1969         } else {
1970                 if (generate_and_send_sums(fd, sx.st.st_size, f_out, f_copy) < 0) {
1971                         rprintf(FWARNING,
1972                             "WARNING: file is too large for checksum sending: %s\n",
1973                             fnamecmp);
1974                         write_sum_head(f_out, NULL);
1975                 }
1976                 close(fd);
1977         }
1978
1979   cleanup:
1980         if (back_file) {
1981                 int save_preserve_xattrs = preserve_xattrs;
1982                 if (f_copy >= 0)
1983                         close(f_copy);
1984 #ifdef SUPPORT_XATTRS
1985                 if (preserve_xattrs) {
1986                         copy_xattrs(fname, backupptr);
1987                         preserve_xattrs = 0;
1988                 }
1989 #endif
1990                 set_file_attrs(backupptr, back_file, NULL, NULL, 0);
1991                 preserve_xattrs = save_preserve_xattrs;
1992                 if (verbose > 1) {
1993                         rprintf(FINFO, "backed up %s to %s\n",
1994                                 fname, backupptr);
1995                 }
1996                 unmake_file(back_file);
1997         }
1998
1999 #ifdef SUPPORT_ACLS
2000         if (preserve_acls)
2001                 free_acl(&sx);
2002 #endif
2003 #ifdef SUPPORT_XATTRS
2004         if (preserve_xattrs)
2005                 free_xattr(&sx);
2006 #endif
2007         return;
2008 }
2009
2010 #ifdef SUPPORT_HARD_LINKS
2011 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
2012                                  enum logcode code, int f_out)
2013 {
2014         char fbuf[MAXPATHLEN];
2015         int new_last_ndx;
2016         struct file_list *save_flist = cur_flist;
2017
2018         /* If we skip the last item in a chain of links and there was a
2019          * prior non-skipped hard-link waiting to finish, finish it now. */
2020         if ((new_last_ndx = skip_hard_link(file, &cur_flist)) < 0)
2021                 return;
2022
2023         file = cur_flist->files[new_last_ndx - cur_flist->ndx_start];
2024         cur_flist->in_progress--; /* undo prior increment */
2025         f_name(file, fbuf);
2026         recv_generator(fbuf, file, new_last_ndx, itemizing, code, f_out);
2027
2028         cur_flist = save_flist;
2029 }
2030 #endif
2031
2032 static void touch_up_dirs(struct file_list *flist, int ndx)
2033 {
2034         static int counter = 0;
2035         struct file_struct *file;
2036         char *fname;
2037         BOOL fix_dir_perms;
2038         int i, start, end;
2039
2040         if (ndx < 0) {
2041                 start = 0;
2042                 end = flist->used - 1;
2043         } else
2044                 start = end = ndx;
2045
2046         /* Fix any directory permissions that were modified during the
2047          * transfer and/or re-set any tweaked modified-time values. */
2048         for (i = start; i <= end; i++, counter++) {
2049                 file = flist->files[i];
2050                 if (!S_ISDIR(file->mode)
2051                  || (!implied_dirs && file->flags & FLAG_IMPLIED_DIR))
2052                         continue;
2053                 if (verbose > 3) {
2054                         fname = f_name(file, NULL);
2055                         rprintf(FINFO, "touch_up_dirs: %s (%d)\n",
2056                                 NS(fname), i);
2057                 }
2058                 /* Be sure not to retouch permissions with --fake-super. */
2059                 fix_dir_perms = !am_root && !(file->mode & S_IWUSR);
2060                 if (!F_IS_ACTIVE(file) || file->flags & FLAG_MISSING_DIR
2061                  || !(need_retouch_dir_times || fix_dir_perms))
2062                         continue;
2063                 fname = f_name(file, NULL);
2064                 if (fix_dir_perms)
2065                         do_chmod(fname, file->mode);
2066                 if (need_retouch_dir_times) {
2067                         STRUCT_STAT st;
2068                         if (link_stat(fname, &st, 0) == 0
2069                          && cmp_time(st.st_mtime, file->modtime) != 0)
2070                                 set_modtime(fname, file->modtime, file->mode);
2071                 }
2072                 if (counter >= loopchk_limit) {
2073                         if (allowed_lull)
2074                                 maybe_send_keepalive();
2075                         else
2076                                 maybe_flush_socket(0);
2077                         counter = 0;
2078                 }
2079         }
2080 }
2081
2082 void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
2083 {
2084         struct file_struct *file;
2085         struct file_list *flist;
2086         char fbuf[MAXPATHLEN];
2087         int ndx;
2088
2089         while (1) {
2090 #ifdef SUPPORT_HARD_LINKS
2091                 if (preserve_hard_links && (ndx = get_hlink_num()) != -1) {
2092                         flist = flist_for_ndx(ndx, "check_for_finished_files.1");
2093                         file = flist->files[ndx - flist->ndx_start];
2094                         assert(file->flags & FLAG_HLINKED);
2095                         finish_hard_link(file, f_name(file, fbuf), ndx, NULL, itemizing, code, -1);
2096                         flist->in_progress--;
2097                         continue;
2098                 }
2099 #endif
2100
2101                 if (check_redo && (ndx = get_redo_num()) != -1) {
2102                         csum_length = SUM_LENGTH;
2103                         max_size = -max_size;
2104                         min_size = -min_size;
2105                         ignore_existing = -ignore_existing;
2106                         ignore_non_existing = -ignore_non_existing;
2107                         update_only = -update_only;
2108                         always_checksum = -always_checksum;
2109                         size_only = -size_only;
2110                         append_mode = -append_mode;
2111                         make_backups = -make_backups; /* avoid dup backup w/inplace */
2112                         ignore_times++;
2113
2114                         flist = cur_flist;
2115                         cur_flist = flist_for_ndx(ndx, "check_for_finished_files.2");
2116
2117                         file = cur_flist->files[ndx - cur_flist->ndx_start];
2118                         if (solo_file)
2119                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2120                         else
2121                                 f_name(file, fbuf);
2122                         recv_generator(fbuf, file, ndx, itemizing, code, sock_f_out);
2123                         cur_flist->to_redo--;
2124
2125                         cur_flist = flist;
2126
2127                         csum_length = SHORT_SUM_LENGTH;
2128                         max_size = -max_size;
2129                         min_size = -min_size;
2130                         ignore_existing = -ignore_existing;
2131                         ignore_non_existing = -ignore_non_existing;
2132                         update_only = -update_only;
2133                         always_checksum = -always_checksum;
2134                         size_only = -size_only;
2135                         append_mode = -append_mode;
2136                         make_backups = -make_backups;
2137                         ignore_times--;
2138                         continue;
2139                 }
2140
2141                 if (cur_flist == first_flist)
2142                         break;
2143
2144                 /* We only get here if inc_recurse is enabled. */
2145                 if (first_flist->in_progress || first_flist->to_redo)
2146                         break;
2147
2148                 write_ndx(sock_f_out, NDX_DONE);
2149                 if (!read_batch)
2150                         maybe_flush_socket(1);
2151
2152                 if (delete_during == 2 || !dir_tweaking) {
2153                         /* Skip directory touch-up. */
2154                 } else if (first_flist->parent_ndx >= 0)
2155                         touch_up_dirs(dir_flist, first_flist->parent_ndx);
2156
2157                 flist_free(first_flist); /* updates first_flist */
2158         }
2159 }
2160
2161 void generate_files(int f_out, const char *local_name)
2162 {
2163         int i, ndx, next_loopchk = 0;
2164         char fbuf[MAXPATHLEN];
2165         int itemizing;
2166         enum logcode code;
2167         int save_do_progress = do_progress;
2168
2169         if (protocol_version >= 29) {
2170                 itemizing = 1;
2171                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2172                 code = logfile_format_has_i ? FNONE : FLOG;
2173         } else if (am_daemon) {
2174                 itemizing = logfile_format_has_i && do_xfers;
2175                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2176                 code = itemizing || !do_xfers ? FCLIENT : FINFO;
2177         } else if (!am_server) {
2178                 itemizing = stdout_format_has_i;
2179                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2180                 code = itemizing ? FNONE : FINFO;
2181         } else {
2182                 itemizing = 0;
2183                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2184                 code = FINFO;
2185         }
2186         solo_file = local_name;
2187         dir_tweaking = !(list_only || solo_file || dry_run);
2188         need_retouch_dir_times = preserve_times > 1;
2189         loopchk_limit = allowed_lull ? allowed_lull * 5 : 200;
2190         symlink_timeset_failed_flags = ITEM_REPORT_TIME
2191             | (protocol_version >= 30 || !am_server ? ITEM_REPORT_TIMEFAIL : 0);
2192         implied_dirs_are_missing = relative_paths && !implied_dirs && protocol_version < 30;
2193
2194         if (verbose > 2)
2195                 rprintf(FINFO, "generator starting pid=%ld\n", (long)getpid());
2196
2197         if (delete_before && !solo_file && cur_flist->used > 0)
2198                 do_delete_pass();
2199         if (delete_during == 2) {
2200                 deldelay_size = BIGPATHBUFLEN * 4;
2201                 deldelay_buf = new_array(char, deldelay_size);
2202                 if (!deldelay_buf)
2203                         out_of_memory("delete-delay");
2204         }
2205         do_progress = 0;
2206
2207         if (append_mode > 0 || whole_file < 0)
2208                 whole_file = 0;
2209         if (verbose >= 2) {
2210                 rprintf(FINFO, "delta-transmission %s\n",
2211                         whole_file
2212                         ? "disabled for local transfer or --whole-file"
2213                         : "enabled");
2214         }
2215
2216         /* Since we often fill up the outgoing socket and then just sit around
2217          * waiting for the other 2 processes to do their thing, we don't want
2218          * to exit on a timeout.  If the data stops flowing, the receiver will
2219          * notice that and let us know via the message pipe (or its closing). */
2220         ignore_timeout = 1;
2221
2222         dflt_perms = (ACCESSPERMS & ~orig_umask);
2223
2224         do {
2225 #ifdef SUPPORT_HARD_LINKS
2226                 if (preserve_hard_links && inc_recurse) {
2227                         while (!flist_eof && file_total < FILECNT_LOOKAHEAD/2)
2228                                 wait_for_receiver();
2229                 }
2230 #endif
2231
2232                 if (inc_recurse && cur_flist->parent_ndx >= 0) {
2233                         struct file_struct *fp = dir_flist->files[cur_flist->parent_ndx];
2234                         if (solo_file)
2235                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2236                         else
2237                                 f_name(fp, fbuf);
2238                         ndx = cur_flist->ndx_start - 1;
2239                         recv_generator(fbuf, fp, ndx, itemizing, code, f_out);
2240                         if (delete_during && dry_run < 2 && !list_only
2241                          && !(fp->flags & FLAG_MISSING_DIR)) {
2242                                 if (fp->flags & FLAG_CONTENT_DIR) {
2243                                         dev_t dirdev;
2244                                         if (one_file_system) {
2245                                                 uint32 *devp = F_DIR_DEV_P(fp);
2246                                                 dirdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
2247                                         } else
2248                                                 dirdev = MAKEDEV(0, 0);
2249                                         delete_in_dir(fbuf, fp, &dirdev);
2250                                 } else
2251                                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(fp));
2252                         }
2253                 }
2254                 for (i = cur_flist->low; i <= cur_flist->high; i++) {
2255                         struct file_struct *file = cur_flist->sorted[i];
2256
2257                         if (!F_IS_ACTIVE(file))
2258                                 continue;
2259
2260                         if (unsort_ndx)
2261                                 ndx = F_NDX(file);
2262                         else
2263                                 ndx = i + cur_flist->ndx_start;
2264
2265                         if (solo_file)
2266                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2267                         else
2268                                 f_name(file, fbuf);
2269                         recv_generator(fbuf, file, ndx, itemizing, code, f_out);
2270
2271                         check_for_finished_files(itemizing, code, 0);
2272
2273                         if (i + cur_flist->ndx_start >= next_loopchk) {
2274                                 if (allowed_lull)
2275                                         maybe_send_keepalive();
2276                                 else
2277                                         maybe_flush_socket(0);
2278                                 next_loopchk += loopchk_limit;
2279                         }
2280                 }
2281
2282                 if (!inc_recurse) {
2283                         write_ndx(f_out, NDX_DONE);
2284                         break;
2285                 }
2286
2287                 while (1) {
2288                         check_for_finished_files(itemizing, code, 1);
2289                         if (cur_flist->next || flist_eof)
2290                                 break;
2291                         wait_for_receiver();
2292                 }
2293         } while ((cur_flist = cur_flist->next) != NULL);
2294
2295         if (delete_during)
2296                 delete_in_dir(NULL, NULL, &dev_zero);
2297         phase++;
2298         if (verbose > 2)
2299                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2300
2301         while (1) {
2302                 check_for_finished_files(itemizing, code, 1);
2303                 if (msgdone_cnt)
2304                         break;
2305                 wait_for_receiver();
2306         }
2307
2308         phase++;
2309         if (verbose > 2)
2310                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2311
2312         write_ndx(f_out, NDX_DONE);
2313
2314         /* Reduce round-trip lag-time for a useless delay-updates phase. */
2315         if (protocol_version >= 29 && !delay_updates)
2316                 write_ndx(f_out, NDX_DONE);
2317
2318         /* Read MSG_DONE for the redo phase (and any prior messages). */
2319         while (1) {
2320                 check_for_finished_files(itemizing, code, 0);
2321                 if (msgdone_cnt > 1)
2322                         break;
2323                 wait_for_receiver();
2324         }
2325
2326         if (protocol_version >= 29) {
2327                 phase++;
2328                 if (verbose > 2)
2329                         rprintf(FINFO, "generate_files phase=%d\n", phase);
2330                 if (delay_updates)
2331                         write_ndx(f_out, NDX_DONE);
2332                 /* Read MSG_DONE for delay-updates phase & prior messages. */
2333                 while (msgdone_cnt == 2)
2334                         wait_for_receiver();
2335         }
2336
2337         do_progress = save_do_progress;
2338         if (delete_during == 2)
2339                 do_delayed_deletions(fbuf);
2340         if (delete_after && !solo_file && file_total > 0)
2341                 do_delete_pass();
2342
2343         if ((need_retouch_dir_perms || need_retouch_dir_times)
2344          && dir_tweaking && (!inc_recurse || delete_during == 2))
2345                 touch_up_dirs(dir_flist, -1);
2346
2347         if (max_delete >= 0 && deletion_count > max_delete) {
2348                 rprintf(FWARNING,
2349                         "Deletions stopped due to --max-delete limit (%d skipped)\n",
2350                         deletion_count - max_delete);
2351                 io_error |= IOERR_DEL_LIMIT;
2352         }
2353
2354         if (verbose > 2)
2355                 rprintf(FINFO, "generate_files finished\n");
2356 }