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, GDL_DEL_NEEDS_UID);
 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                 uid_t fp_owner = uid_ndx ? F_OWNER(fp) : F_DEL_OWNER(fp);
 277
 278                 if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) {
 279                         if (verbose > 1) {
 280                                 rprintf(FINFO,
 281                                     "mount point, %s, pins parent directory\n",
 282                                     f_name(fp, NULL));
 283                         }
 284                         ret = DR_NOT_EMPTY;
 285                         continue;
 286                 }
 287
 288                 strlcpy(p, fp->basename, remainder);
 289                 if (!(fp->mode & S_IWUSR) && !am_root && fp_owner == our_uid)
 290                         do_chmod(fname, fp->mode | S_IWUSR);
 291                 /* Save stack by recursing to ourself directly. */
 292                 if (S_ISDIR(fp->mode)) {
 293                         if (delete_dir_contents(fname, flags | DEL_RECURSE) != DR_SUCCESS)
 294                                 ret = DR_NOT_EMPTY;
 295                 }
 296                 if (delete_item(fname, fp->mode, flags) != DR_SUCCESS)
 297                         ret = DR_NOT_EMPTY;
 298         }
 299
 300         fname[dlen] = '\0';
 301
 302   done:
 303         flist_free(dirlist);
 304         pop_local_filters(save_filters);
 305
 306         if (ret == DR_NOT_EMPTY) {
 307                 rprintf(FINFO, "cannot delete non-empty directory: %s\n",
 308                         fname);
 309         }
 310         return ret;
 311 }
 312
 313 static int start_delete_delay_temp(void)
 314 {
 315         char fnametmp[MAXPATHLEN];
 316         int save_dry_run = dry_run;
 317
 318         dry_run = 0;
 319         if (!get_tmpname(fnametmp, "deldelay")
 320          || (deldelay_fd = do_mkstemp(fnametmp, 0600)) < 0) {
 321                 rprintf(FINFO, "NOTE: Unable to create delete-delay temp file%s.\n",
 322                         inc_recurse ? "" : " -- switching to --delete-after");
 323                 delete_during = 0;
 324                 delete_after = !inc_recurse;
 325                 dry_run = save_dry_run;
 326                 return 0;
 327         }
 328         unlink(fnametmp);
 329         dry_run = save_dry_run;
 330         return 1;
 331 }
 332
 333 static int flush_delete_delay(void)
 334 {
 335         if (deldelay_fd < 0 && !start_delete_delay_temp())
 336                 return 0;
 337         if (write(deldelay_fd, deldelay_buf, deldelay_cnt) != deldelay_cnt) {
 338                 rsyserr(FERROR, errno, "flush of delete-delay buffer");
 339                 delete_during = 0;
 340                 delete_after = !inc_recurse;
 341                 close(deldelay_fd);
 342                 return 0;
 343         }
 344         deldelay_cnt = 0;
 345         return 1;
 346 }
 347
 348 static int remember_delete(struct file_struct *file, const char *fname, int flags)
 349 {
 350         int len;
 351
 352         if (deldelay_cnt == deldelay_size && !flush_delete_delay())
 353                 return 0;
 354
 355         if (flags & DEL_NO_UID_WRITE)
 356                 deldelay_buf[deldelay_cnt++] = '!';
 357
 358         while (1) {
 359                 len = snprintf(deldelay_buf + deldelay_cnt,
 360                                deldelay_size - deldelay_cnt,
 361                                "%x %s%c",
 362                                (int)file->mode, fname, '\0');
 363                 if ((deldelay_cnt += len) <= deldelay_size)
 364                         break;
 365                 deldelay_cnt -= len;
 366                 if (!flush_delete_delay())
 367                         return 0;
 368         }
 369
 370         return 1;
 371 }
 372
 373 static int read_delay_line(char *buf, int *flags_p)
 374 {
 375         static int read_pos = 0;
 376         int j, len, mode;
 377         char *bp, *past_space;
 378
 379         while (1) {
 380                 for (j = read_pos; j < deldelay_cnt && deldelay_buf[j]; j++) {}
 381                 if (j < deldelay_cnt)
 382                         break;
 383                 if (deldelay_fd < 0) {
 384                         if (j > read_pos)
 385                                 goto invalid_data;
 386                         return -1;
 387                 }
 388                 deldelay_cnt -= read_pos;
 389                 if (deldelay_cnt == deldelay_size)
 390                         goto invalid_data;
 391                 if (deldelay_cnt && read_pos) {
 392                         memmove(deldelay_buf, deldelay_buf + read_pos,
 393                                 deldelay_cnt);
 394                 }
 395                 len = read(deldelay_fd, deldelay_buf + deldelay_cnt,
 396                            deldelay_size - deldelay_cnt);
 397                 if (len == 0) {
 398                         if (deldelay_cnt) {
 399                                 rprintf(FERROR,
 400                                     "ERROR: unexpected EOF in delete-delay file.\n");
 401                         }
 402                         return -1;
 403                 }
 404                 if (len < 0) {
 405                         rsyserr(FERROR, errno,
 406                                 "reading delete-delay file");
 407                         return -1;
 408                 }
 409                 deldelay_cnt += len;
 410                 read_pos = 0;
 411         }
 412
 413         bp = deldelay_buf + read_pos;
 414         if (*bp == '!') {
 415                 bp++;
 416                 *flags_p = DEL_NO_UID_WRITE;
 417         } else
 418                 *flags_p = 0;
 419
 420         if (sscanf(bp, "%x ", &mode) != 1) {
 421           invalid_data:
 422                 rprintf(FERROR, "ERROR: invalid data in delete-delay file.\n");
 423                 return -1;
 424         }
 425         past_space = strchr(bp, ' ') + 1;
 426         len = j - read_pos - (past_space - bp) + 1; /* count the '\0' */
 427         read_pos = j + 1;
 428
 429         if (len > MAXPATHLEN) {
 430                 rprintf(FERROR, "ERROR: filename too long in delete-delay file.\n");
 431                 return -1;
 432         }
 433
 434         /* The caller needs the name in a MAXPATHLEN buffer, so we copy it
 435          * instead of returning a pointer to our buffer. */
 436         memcpy(buf, past_space, len);
 437
 438         return mode;
 439 }
 440
 441 static void do_delayed_deletions(char *delbuf)
 442 {
 443         int mode, flags;
 444
 445         if (deldelay_fd >= 0) {
 446                 if (deldelay_cnt && !flush_delete_delay())
 447                         return;
 448                 lseek(deldelay_fd, 0, 0);
 449         }
 450         while ((mode = read_delay_line(delbuf, &flags)) >= 0)
 451                 delete_item(delbuf, mode, flags | DEL_RECURSE);
 452         if (deldelay_fd >= 0)
 453                 close(deldelay_fd);
 454 }
 455
 456 /* This function is used to implement per-directory deletion, and is used by
 457  * all the --delete-WHEN options.  Note that the fbuf pointer must point to a
 458  * MAXPATHLEN buffer with the name of the directory in it (the functions we
 459  * call will append names onto the end, but the old dir value will be restored
 460  * on exit). */
 461 static void delete_in_dir(char *fbuf, struct file_struct *file, dev_t *fs_dev)
 462 {
 463         static int already_warned = 0;
 464         struct file_list *dirlist;
 465         char delbuf[MAXPATHLEN];
 466         int dlen, i;
 467
 468         if (!fbuf) {
 469                 change_local_filter_dir(NULL, 0, 0);
 470                 return;
 471         }
 472
 473         if (verbose > 2)
 474                 rprintf(FINFO, "delete_in_dir(%s)\n", fbuf);
 475
 476         if (allowed_lull)
 477                 maybe_send_keepalive();
 478
 479         if (io_error && !ignore_errors) {
 480                 if (already_warned)
 481                         return;
 482                 rprintf(FINFO,
 483                         "IO error encountered -- skipping file deletion\n");
 484                 already_warned = 1;
 485                 return;
 486         }
 487
 488         dlen = strlen(fbuf);
 489         change_local_filter_dir(fbuf, dlen, F_DEPTH(file));
 490
 491         if (one_file_system) {
 492                 if (file->flags & FLAG_TOP_DIR)
 493                         filesystem_dev = *fs_dev;
 494                 else if (filesystem_dev != *fs_dev)
 495                         return;
 496         }
 497
 498         dirlist = get_dirlist(fbuf, dlen, GDL_DEL_NEEDS_UID);
 499
 500         /* If an item in dirlist is not found in flist, delete it
 501          * from the filesystem. */
 502         for (i = dirlist->used; i--; ) {
 503                 struct file_struct *fp = dirlist->files[i];
 504                 if (!F_IS_ACTIVE(fp))
 505                         continue;
 506                 if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) {
 507                         if (verbose > 1)
 508                                 rprintf(FINFO, "cannot delete mount point: %s\n",
 509                                         f_name(fp, NULL));
 510                         continue;
 511                 }
 512                 /* Here we want to match regardless of file type.  Replacement
 513                  * of a file with one of another type is handled separately by
 514                  * a delete_item call with a DEL_MAKE_ROOM flag. */
 515                 if (flist_find_ignore_dirness(cur_flist, fp) < 0) {
 516                         int flags = DEL_RECURSE;
 517                         uid_t fp_owner = uid_ndx ? F_OWNER(fp) : F_DEL_OWNER(fp);
 518                         if (!(fp->mode & S_IWUSR) && !am_root && fp_owner == our_uid)
 519                                 flags |= DEL_NO_UID_WRITE;
 520                         f_name(fp, delbuf);
 521                         if (delete_during == 2) {
 522                                 if (!remember_delete(fp, delbuf, flags))
 523                                         break;
 524                         } else
 525                                 delete_item(delbuf, fp->mode, flags);
 526                 }
 527         }
 528
 529         flist_free(dirlist);
 530 }
 531
 532 /* This deletes any files on the receiving side that are not present on the
 533  * sending side.  This is used by --delete-before and --delete-after. */
 534 static void do_delete_pass(void)
 535 {
 536         char fbuf[MAXPATHLEN];
 537         STRUCT_STAT st;
 538         int j;
 539
 540         /* dry_run is incremented when the destination doesn't exist yet. */
 541         if (dry_run > 1 || list_only)
 542                 return;
 543
 544         for (j = 0; j < cur_flist->used; j++) {
 545                 struct file_struct *file = cur_flist->sorted[j];
 546
 547                 f_name(file, fbuf);
 548
 549                 if (!(file->flags & FLAG_CONTENT_DIR)) {
 550                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(file));
 551                         continue;
 552                 }
 553
 554                 if (verbose > 1 && file->flags & FLAG_TOP_DIR)
 555                         rprintf(FINFO, "deleting in %s\n", fbuf);
 556
 557                 if (link_stat(fbuf, &st, keep_dirlinks) < 0
 558                  || !S_ISDIR(st.st_mode))
 559                         continue;
 560
 561                 delete_in_dir(fbuf, file, &st.st_dev);
 562         }
 563         delete_in_dir(NULL, NULL, &dev_zero);
 564
 565         if (do_progress && !am_server)
 566                 rprintf(FINFO, "                    \r");
 567 }
 568
 569 int unchanged_attrs(const char *fname, struct file_struct *file, stat_x *sxp)
 570 {
 571 #if !defined HAVE_LUTIMES || !defined HAVE_UTIMES
 572         if (S_ISLNK(file->mode)) {
 573                 ;
 574         } else
 575 #endif
 576         if (preserve_times && cmp_time(sxp->st.st_mtime, file->modtime) != 0)
 577                 return 0;
 578
 579         if (preserve_perms) {
 580                 if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
 581                         return 0;
 582         } else if (preserve_executability
 583          && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
 584                 return 0;
 585
 586         if (am_root && uid_ndx && sxp->st.st_uid != (uid_t)F_OWNER(file))
 587                 return 0;
 588
 589         if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP) && sxp->st.st_gid != (gid_t)F_GROUP(file))
 590                 return 0;
 591
 592 #ifdef SUPPORT_ACLS
 593         if (preserve_acls && !S_ISLNK(file->mode)) {
 594                 if (!ACL_READY(*sxp))
 595                         get_acl(fname, sxp);
 596                 if (set_acl(NULL, file, sxp) == 0)
 597                         return 0;
 598         }
 599 #endif
 600 #ifdef SUPPORT_XATTRS
 601         if (preserve_xattrs) {
 602                 if (!XATTR_READY(*sxp))
 603                         get_xattr(fname, sxp);
 604                 if (xattr_diff(file, sxp, 0))
 605                         return 0;
 606         }
 607 #endif
 608
 609         return 1;
 610 }
 611
 612 void itemize(const char *fnamecmp, struct file_struct *file, int ndx, int statret,
 613              stat_x *sxp, int32 iflags, uchar fnamecmp_type,
 614              const char *xname)
 615 {
 616         if (statret >= 0) { /* A from-dest-dir statret can == 1! */
 617                 int keep_time = !preserve_times ? 0
 618                     : S_ISDIR(file->mode) ? preserve_times > 1 :
 619 #if defined HAVE_LUTIMES && defined HAVE_UTIMES
 620                     1;
 621 #else
 622                     !S_ISLNK(file->mode);
 623 #endif
 624
 625                 if (S_ISREG(file->mode) && F_LENGTH(file) != sxp->st.st_size)
 626                         iflags |= ITEM_REPORT_SIZE;
 627                 if (file->flags & FLAG_TIME_FAILED) { /* symlinks only */
 628                         if (iflags & ITEM_LOCAL_CHANGE)
 629                                 iflags |= symlink_timeset_failed_flags;
 630                 } else if (keep_time
 631                  ? cmp_time(file->modtime, sxp->st.st_mtime) != 0
 632                  : iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !(iflags & ITEM_MATCHED)
 633                   && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
 634                         iflags |= ITEM_REPORT_TIME;
 635 #if !defined HAVE_LCHMOD && !defined HAVE_SETATTRLIST
 636                 if (S_ISLNK(file->mode)) {
 637                         ;
 638                 } else
 639 #endif
 640                 if (preserve_perms) {
 641                         if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
 642                                 iflags |= ITEM_REPORT_PERMS;
 643                 } else if (preserve_executability
 644                  && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
 645                         iflags |= ITEM_REPORT_PERMS;
 646                 if (uid_ndx && am_root && (uid_t)F_OWNER(file) != sxp->st.st_uid)
 647                         iflags |= ITEM_REPORT_OWNER;
 648                 if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP)
 649                     && sxp->st.st_gid != (gid_t)F_GROUP(file))
 650                         iflags |= ITEM_REPORT_GROUP;
 651 #ifdef SUPPORT_ACLS
 652                 if (preserve_acls && !S_ISLNK(file->mode)) {
 653                         if (!ACL_READY(*sxp))
 654                                 get_acl(fnamecmp, sxp);
 655                         if (set_acl(NULL, file, sxp) == 0)
 656                                 iflags |= ITEM_REPORT_ACL;
 657                 }
 658 #endif
 659 #ifdef SUPPORT_XATTRS
 660                 if (preserve_xattrs) {
 661                         if (!XATTR_READY(*sxp))
 662                                 get_xattr(fnamecmp, sxp);
 663                         if (xattr_diff(file, sxp, 1))
 664                                 iflags |= ITEM_REPORT_XATTR;
 665                 }
 666 #endif
 667         } else {
 668 #ifdef SUPPORT_XATTRS
 669                 if (preserve_xattrs && xattr_diff(file, NULL, 1))
 670                         iflags |= ITEM_REPORT_XATTR;
 671 #endif
 672                 iflags |= ITEM_IS_NEW;
 673         }
 674
 675         iflags &= 0xffff;
 676         if ((iflags & (SIGNIFICANT_ITEM_FLAGS|ITEM_REPORT_XATTR) || verbose > 1
 677           || stdout_format_has_i > 1 || (xname && *xname)) && !read_batch) {
 678                 if (protocol_version >= 29) {
 679                         if (ndx >= 0)
 680                                 write_ndx(sock_f_out, ndx);
 681                         write_shortint(sock_f_out, iflags);
 682                         if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
 683                                 write_byte(sock_f_out, fnamecmp_type);
 684                         if (iflags & ITEM_XNAME_FOLLOWS)
 685                                 write_vstring(sock_f_out, xname, strlen(xname));
 686 #ifdef SUPPORT_XATTRS
 687                         if (preserve_xattrs && do_xfers
 688                          && iflags & (ITEM_REPORT_XATTR|ITEM_TRANSFER)) {
 689                                 send_xattr_request(NULL, file,
 690                                         iflags & ITEM_REPORT_XATTR ? sock_f_out : -1);
 691                         }
 692 #endif
 693                 } else if (ndx >= 0) {
 694                         enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
 695                         log_item(code, file, &stats, iflags, xname);
 696                 }
 697         }
 698 }
 699
 700
 701 /* Perform our quick-check heuristic for determining if a file is unchanged. */
 702 int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
 703 {
 704         if (st->st_size != F_LENGTH(file))
 705                 return 0;
 706
 707         /* if always checksum is set then we use the checksum instead
 708            of the file time to determine whether to sync */
 709         if (always_checksum > 0 && S_ISREG(st->st_mode)) {
 710                 char sum[MAX_DIGEST_LEN];
 711                 file_checksum(fn, sum, st->st_size);
 712                 return memcmp(sum, F_SUM(file), checksum_len) == 0;
 713         }
 714
 715         if (size_only > 0)
 716                 return 1;
 717
 718         if (ignore_times)
 719                 return 0;
 720
 721         return cmp_time(st->st_mtime, file->modtime) == 0;
 722 }
 723
 724
 725 /*
 726  * set (initialize) the size entries in the per-file sum_struct
 727  * calculating dynamic block and checksum sizes.
 728  *
 729  * This is only called from generate_and_send_sums() but is a separate
 730  * function to encapsulate the logic.
 731  *
 732  * The block size is a rounded square root of file length.
 733  *
 734  * The checksum size is determined according to:
 735  *     blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
 736  * provided by Donovan Baarda which gives a probability of rsync
 737  * algorithm corrupting data and falling back using the whole md4
 738  * checksums.
 739  *
 740  * This might be made one of several selectable heuristics.
 741  */
 742 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
 743 {
 744         int32 blength;
 745         int s2length;
 746         int64 l;
 747
 748         if (len < 0) {
 749                 /* The file length overflowed our int64 var, so we can't process this file. */
 750                 sum->count = -1; /* indicate overflow error */
 751                 return;
 752         }
 753
 754         if (block_size)
 755                 blength = block_size;
 756         else if (len <= BLOCK_SIZE * BLOCK_SIZE)
 757                 blength = BLOCK_SIZE;
 758         else {
 759                 int32 max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE;
 760                 int32 c;
 761                 int cnt;
 762                 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
 763                 if (c < 0 || c >= max_blength)
 764                         blength = max_blength;
 765                 else {
 766                     blength = 0;
 767                     do {
 768                             blength |= c;
 769                             if (len < (int64)blength * blength)
 770                                     blength &= ~c;
 771                             c >>= 1;
 772                     } while (c >= 8);   /* round to multiple of 8 */
 773                     blength = MAX(blength, BLOCK_SIZE);
 774                 }
 775         }
 776
 777         if (protocol_version < 27) {
 778                 s2length = csum_length;
 779         } else if (csum_length == SUM_LENGTH) {
 780                 s2length = SUM_LENGTH;
 781         } else {
 782                 int32 c;
 783                 int b = BLOCKSUM_BIAS;
 784                 for (l = len; l >>= 1; b += 2) {}
 785                 for (c = blength; (c >>= 1) && b; b--) {}
 786                 /* add a bit, subtract rollsum, round up. */
 787                 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
 788                 s2length = MAX(s2length, csum_length);
 789                 s2length = MIN(s2length, SUM_LENGTH);
 790         }
 791
 792         sum->flength    = len;
 793         sum->blength    = blength;
 794         sum->s2length   = s2length;
 795         sum->remainder  = (int32)(len % blength);
 796         sum->count      = (int32)(l = (len / blength) + (sum->remainder != 0));
 797
 798         if ((int64)sum->count != l)
 799                 sum->count = -1;
 800
 801         if (sum->count && verbose > 2) {
 802                 rprintf(FINFO,
 803                         "count=%.0f rem=%ld blength=%ld s2length=%d flength=%.0f\n",
 804                         (double)sum->count, (long)sum->remainder, (long)sum->blength,
 805                         sum->s2length, (double)sum->flength);
 806         }
 807 }
 808
 809
 810 /*
 811  * Generate and send a stream of signatures/checksums that describe a buffer
 812  *
 813  * Generate approximately one checksum every block_len bytes.
 814  */
 815 static int generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
 816 {
 817         int32 i;
 818         struct map_struct *mapbuf;
 819         struct sum_struct sum;
 820         OFF_T offset = 0;
 821
 822         sum_sizes_sqroot(&sum, len);
 823         if (sum.count < 0)
 824                 return -1;
 825         write_sum_head(f_out, &sum);
 826
 827         if (append_mode > 0 && f_copy < 0)
 828                 return 0;
 829
 830         if (len > 0)
 831                 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
 832         else
 833                 mapbuf = NULL;
 834
 835         for (i = 0; i < sum.count; i++) {
 836                 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
 837                 char *map = map_ptr(mapbuf, offset, n1);
 838                 char sum2[SUM_LENGTH];
 839                 uint32 sum1;
 840
 841                 len -= n1;
 842                 offset += n1;
 843
 844                 if (f_copy >= 0) {
 845                         full_write(f_copy, map, n1);
 846                         if (append_mode > 0)
 847                                 continue;
 848                 }
 849
 850                 sum1 = get_checksum1(map, n1);
 851                 get_checksum2(map, n1, sum2);
 852
 853                 if (verbose > 3) {
 854                         rprintf(FINFO,
 855                                 "chunk[%.0f] offset=%.0f len=%ld sum1=%08lx\n",
 856                                 (double)i, (double)offset - n1, (long)n1,
 857                                 (unsigned long)sum1);
 858                 }
 859                 write_int(f_out, sum1);
 860                 write_buf(f_out, sum2, sum.s2length);
 861         }
 862
 863         if (mapbuf)
 864                 unmap_file(mapbuf);
 865
 866         return 0;
 867 }
 868
 869
 870 /* Try to find a filename in the same dir as "fname" with a similar name. */
 871 static int find_fuzzy(struct file_struct *file, struct file_list *dirlist)
 872 {
 873         int fname_len, fname_suf_len;
 874         const char *fname_suf, *fname = file->basename;
 875         uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
 876         int j, lowest_j = -1;
 877
 878         fname_len = strlen(fname);
 879         fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
 880
 881         for (j = 0; j < dirlist->used; j++) {
 882                 struct file_struct *fp = dirlist->files[j];
 883                 const char *suf, *name;
 884                 int len, suf_len;
 885                 uint32 dist;
 886
 887                 if (!S_ISREG(fp->mode) || !F_LENGTH(fp)
 888                  || fp->flags & FLAG_FILE_SENT)
 889                         continue;
 890
 891                 name = fp->basename;
 892
 893                 if (F_LENGTH(fp) == F_LENGTH(file)
 894                     && cmp_time(fp->modtime, file->modtime) == 0) {
 895                         if (verbose > 4) {
 896                                 rprintf(FINFO,
 897                                         "fuzzy size/modtime match for %s\n",
 898                                         name);
 899                         }
 900                         return j;
 901                 }
 902
 903                 len = strlen(name);
 904                 suf = find_filename_suffix(name, len, &suf_len);
 905
 906                 dist = fuzzy_distance(name, len, fname, fname_len);
 907                 /* Add some extra weight to how well the suffixes match. */
 908                 dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len)
 909                       * 10;
 910                 if (verbose > 4) {
 911                         rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
 912                                 name, (int)(dist>>16), (int)(dist&0xFFFF));
 913                 }
 914                 if (dist <= lowest_dist) {
 915                         lowest_dist = dist;
 916                         lowest_j = j;
 917                 }
 918         }
 919
 920         return lowest_j;
 921 }
 922
 923 /* Copy a file found in our --copy-dest handling. */
 924 static int copy_altdest_file(const char *src, const char *dest, struct file_struct *file)
 925 {
 926         char buf[MAXPATHLEN];
 927         const char *copy_to, *partialptr;
 928         int save_preserve_xattrs = preserve_xattrs;
 929         int ok, fd_w;
 930
 931         if (inplace) {
 932                 /* Let copy_file open the destination in place. */
 933                 fd_w = -1;
 934                 copy_to = dest;
 935         } else {
 936                 fd_w = open_tmpfile(buf, dest, file);
 937                 if (fd_w < 0)
 938                         return -1;
 939                 copy_to = buf;
 940         }
 941         cleanup_set(copy_to, NULL, NULL, -1, -1);
 942         if (copy_file(src, copy_to, fd_w, file->mode, 0) < 0) {
 943                 if (verbose) {
 944                         rsyserr(FINFO, errno, "copy_file %s => %s",
 945                                 full_fname(src), copy_to);
 946                 }
 947                 /* Try to clean up. */
 948                 unlink(copy_to);
 949                 cleanup_disable();
 950                 return -1;
 951         }
 952         partialptr = partial_dir ? partial_dir_fname(dest) : NULL;
 953         preserve_xattrs = 0; /* xattrs were copied with file */
 954         ok = finish_transfer(dest, copy_to, src, partialptr, file, 1, 0);
 955         preserve_xattrs = save_preserve_xattrs;
 956         cleanup_disable();
 957         return ok ? 0 : -1;
 958 }
 959
 960 /* This is only called for regular files.  We return -2 if we've finished
 961  * handling the file, -1 if no dest-linking occurred, or a non-negative
 962  * value if we found an alternate basis file. */
 963 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
 964                          char *cmpbuf, stat_x *sxp, int itemizing,
 965                          enum logcode code)
 966 {
 967         int best_match = -1;
 968         int match_level = 0;
 969         int j = 0;
 970
 971         do {
 972                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 973                 if (link_stat(cmpbuf, &sxp->st, 0) < 0 || !S_ISREG(sxp->st.st_mode))
 974                         continue;
 975                 switch (match_level) {
 976                 case 0:
 977                         best_match = j;
 978                         match_level = 1;
 979                         /* FALL THROUGH */
 980                 case 1:
 981                         if (!unchanged_file(cmpbuf, file, &sxp->st))
 982                                 continue;
 983                         best_match = j;
 984                         match_level = 2;
 985                         /* FALL THROUGH */
 986                 case 2:
 987                         if (!unchanged_attrs(cmpbuf, file, sxp))
 988                                 continue;
 989                         best_match = j;
 990                         match_level = 3;
 991                         break;
 992                 }
 993                 break;
 994         } while (basis_dir[++j] != NULL);
 995
 996         if (!match_level)
 997                 return -1;
 998
 999         if (j != best_match) {
1000                 j = best_match;
1001                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1002                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1003                         return -1;
1004         }
1005
1006         if (match_level == 3 && !copy_dest) {
1007 #ifdef SUPPORT_HARD_LINKS
1008                 if (link_dest) {
1009                         if (!hard_link_one(file, fname, cmpbuf, 1))
1010                                 goto try_a_copy;
1011                         if (preserve_hard_links && F_IS_HLINKED(file))
1012                                 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, j);
1013                         if (!maybe_ATTRS_REPORT && (verbose > 1 || stdout_format_has_i > 1)) {
1014                                 itemize(cmpbuf, file, ndx, 1, sxp,
1015                                         ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS,
1016                                         0, "");
1017                         }
1018                 } else
1019 #endif
1020                 if (itemizing)
1021                         itemize(cmpbuf, file, ndx, 0, sxp, 0, 0, NULL);
1022                 if (verbose > 1 && maybe_ATTRS_REPORT)
1023                         rprintf(FCLIENT, "%s is uptodate\n", fname);
1024                 return -2;
1025         }
1026
1027         if (match_level >= 2) {
1028 #ifdef SUPPORT_HARD_LINKS
1029           try_a_copy: /* Copy the file locally. */
1030 #endif
1031                 if (!dry_run && copy_altdest_file(cmpbuf, fname, file) < 0)
1032                         return -1;
1033                 if (itemizing)
1034                         itemize(cmpbuf, file, ndx, 0, sxp, ITEM_LOCAL_CHANGE, 0, NULL);
1035                 if (maybe_ATTRS_REPORT
1036                  && ((!itemizing && verbose && match_level == 2)
1037                   || (verbose > 1 && match_level == 3))) {
1038                         code = match_level == 3 ? FCLIENT : FINFO;
1039                         rprintf(code, "%s%s\n", fname,
1040                                 match_level == 3 ? " is uptodate" : "");
1041                 }
1042 #ifdef SUPPORT_HARD_LINKS
1043                 if (preserve_hard_links && F_IS_HLINKED(file))
1044                         finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, -1);
1045 #endif
1046                 return -2;
1047         }
1048
1049         return FNAMECMP_BASIS_DIR_LOW + j;
1050 }
1051
1052 /* This is only called for non-regular files.  We return -2 if we've finished
1053  * handling the file, or -1 if no dest-linking occurred, or a non-negative
1054  * value if we found an alternate basis file. */
1055 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
1056                          char *cmpbuf, stat_x *sxp, int itemizing,
1057                          enum logcode code)
1058 {
1059         char lnk[MAXPATHLEN];
1060         int best_match = -1;
1061         int match_level = 0;
1062         enum nonregtype type;
1063         uint32 *devp;
1064         int len, j = 0;
1065
1066 #ifndef SUPPORT_LINKS
1067         if (S_ISLNK(file->mode))
1068                 return -1;
1069 #endif
1070         if (S_ISDIR(file->mode)) {
1071                 type = TYPE_DIR;
1072         } else if (IS_SPECIAL(file->mode))
1073                 type = TYPE_SPECIAL;
1074         else if (IS_DEVICE(file->mode))
1075                 type = TYPE_DEVICE;
1076 #ifdef SUPPORT_LINKS
1077         else if (S_ISLNK(file->mode))
1078                 type = TYPE_SYMLINK;
1079 #endif
1080         else {
1081                 rprintf(FERROR,
1082                         "internal: try_dests_non() called with invalid mode (%o)\n",
1083                         (int)file->mode);
1084                 exit_cleanup(RERR_UNSUPPORTED);
1085         }
1086
1087         do {
1088                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1089                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1090                         continue;
1091                 switch (type) {
1092                 case TYPE_DIR:
1093                         if (!S_ISDIR(sxp->st.st_mode))
1094                                 continue;
1095                         break;
1096                 case TYPE_SPECIAL:
1097                         if (!IS_SPECIAL(sxp->st.st_mode))
1098                                 continue;
1099                         break;
1100                 case TYPE_DEVICE:
1101                         if (!IS_DEVICE(sxp->st.st_mode))
1102                                 continue;
1103                         break;
1104 #ifdef SUPPORT_LINKS
1105                 case TYPE_SYMLINK:
1106                         if (!S_ISLNK(sxp->st.st_mode))
1107                                 continue;
1108                         break;
1109 #endif
1110                 }
1111                 if (match_level < 1) {
1112                         match_level = 1;
1113                         best_match = j;
1114                 }
1115                 switch (type) {
1116                 case TYPE_DIR:
1117                 case TYPE_SPECIAL:
1118                         break;
1119                 case TYPE_DEVICE:
1120                         devp = F_RDEV_P(file);
1121                         if (sxp->st.st_rdev != MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)))
1122                                 continue;
1123                         break;
1124 #ifdef SUPPORT_LINKS
1125                 case TYPE_SYMLINK:
1126                         if ((len = readlink(cmpbuf, lnk, MAXPATHLEN-1)) <= 0)
1127                                 continue;
1128                         lnk[len] = '\0';
1129                         if (strcmp(lnk, F_SYMLINK(file)) != 0)
1130                                 continue;
1131                         break;
1132 #endif
1133                 }
1134                 if (match_level < 2) {
1135                         match_level = 2;
1136                         best_match = j;
1137                 }
1138                 if (unchanged_attrs(cmpbuf, file, sxp)) {
1139                         match_level = 3;
1140                         best_match = j;
1141                         break;
1142                 }
1143         } while (basis_dir[++j] != NULL);
1144
1145         if (!match_level)
1146                 return -1;
1147
1148         if (j != best_match) {
1149                 j = best_match;
1150                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1151                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1152                         return -1;
1153         }
1154
1155         if (match_level == 3) {
1156 #ifdef SUPPORT_HARD_LINKS
1157                 if (link_dest
1158 #ifndef CAN_HARDLINK_SYMLINK
1159                  && !S_ISLNK(file->mode)
1160 #endif
1161 #ifndef CAN_HARDLINK_SPECIAL
1162                  && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
1163 #endif
1164                  && !S_ISDIR(file->mode)) {
1165                         if (do_link(cmpbuf, fname) < 0) {
1166                                 rsyserr(FERROR_XFER, errno,
1167                                         "failed to hard-link %s with %s",
1168                                         cmpbuf, fname);
1169                                 return j;
1170                         }
1171                         if (preserve_hard_links && F_IS_HLINKED(file))
1172                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1173                 } else
1174 #endif
1175                         match_level = 2;
1176                 if (itemizing && stdout_format_has_i
1177                  && (verbose > 1 || stdout_format_has_i > 1)) {
1178                         int chg = compare_dest && type != TYPE_DIR ? 0
1179                             : ITEM_LOCAL_CHANGE + (match_level == 3 ? ITEM_XNAME_FOLLOWS : 0);
1180                         char *lp = match_level == 3 ? "" : NULL;
1181                         itemize(cmpbuf, file, ndx, 0, sxp, chg + ITEM_MATCHED, 0, lp);
1182                 }
1183                 if (verbose > 1 && maybe_ATTRS_REPORT) {
1184                         rprintf(FCLIENT, "%s%s is uptodate\n",
1185                                 fname, type == TYPE_DIR ? "/" : "");
1186                 }
1187                 return -2;
1188         }
1189
1190         return j;
1191 }
1192
1193 static void list_file_entry(struct file_struct *f)
1194 {
1195         char permbuf[PERMSTRING_SIZE];
1196         double len;
1197
1198         if (!F_IS_ACTIVE(f)) {
1199                 /* this can happen if duplicate names were removed */
1200                 return;
1201         }
1202
1203         permstring(permbuf, f->mode);
1204         len = F_LENGTH(f);
1205
1206         /* TODO: indicate '+' if the entry has an ACL. */
1207
1208 #ifdef SUPPORT_LINKS
1209         if (preserve_links && S_ISLNK(f->mode)) {
1210                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
1211                         permbuf, len, timestring(f->modtime),
1212                         f_name(f, NULL), F_SYMLINK(f));
1213         } else
1214 #endif
1215         {
1216                 rprintf(FINFO, "%s %11.0f %s %s\n",
1217                         permbuf, len, timestring(f->modtime),
1218                         f_name(f, NULL));
1219         }
1220 }
1221
1222 static int phase = 0;
1223 static int dflt_perms;
1224
1225 static int implied_dirs_are_missing;
1226 /* Helper for recv_generator's skip_dir and dry_missing_dir tests. */
1227 static BOOL is_below(struct file_struct *file, struct file_struct *subtree)
1228 {
1229         return F_DEPTH(file) > F_DEPTH(subtree)
1230                 && (!implied_dirs_are_missing || f_name_has_prefix(file, subtree));
1231 }
1232
1233 /* Acts on the indicated item in cur_flist whose name is fname.  If a dir,
1234  * make sure it exists, and has the right permissions/timestamp info.  For
1235  * all other non-regular files (symlinks, etc.) we create them here.  For
1236  * regular files that have changed, we try to find a basis file and then
1237  * start sending checksums.  The ndx is the file's unique index value.
1238  *
1239  * The fname parameter must point to a MAXPATHLEN buffer!  (e.g it gets
1240  * passed to delete_item(), which can use it during a recursive delete.)
1241  *
1242  * Note that f_out is set to -1 when doing final directory-permission and
1243  * modification-time repair. */
1244 static void recv_generator(char *fname, struct file_struct *file, int ndx,
1245                            int itemizing, enum logcode code, int f_out)
1246 {
1247         static const char *parent_dirname = "";
1248         /* Missing dir not created due to --dry-run; will still be scanned. */
1249         static struct file_struct *dry_missing_dir = NULL;
1250         /* Missing dir whose contents are skipped altogether due to
1251          * --ignore-non-existing, daemon exclude, or mkdir failure. */
1252         static struct file_struct *skip_dir = NULL;
1253         static struct file_list *fuzzy_dirlist = NULL;
1254         static int need_fuzzy_dirlist = 0;
1255         struct file_struct *fuzzy_file = NULL;
1256         int fd = -1, f_copy = -1;
1257         stat_x sx, real_sx;
1258         STRUCT_STAT partial_st;
1259         struct file_struct *back_file = NULL;
1260         int statret, real_ret, stat_errno;
1261         char *fnamecmp, *partialptr, *backupptr = NULL;
1262         char fnamecmpbuf[MAXPATHLEN];
1263         uchar fnamecmp_type;
1264         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1265         int is_dir = !S_ISDIR(file->mode) ? 0
1266                    : inc_recurse && ndx != cur_flist->ndx_start - 1 ? -1
1267                    : 1;
1268
1269         if (verbose > 2)
1270                 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
1271
1272         if (list_only) {
1273                 if (is_dir < 0
1274                  || (is_dir && !implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1275                         return;
1276                 list_file_entry(file);
1277                 return;
1278         }
1279
1280         if (skip_dir) {
1281                 if (is_below(file, skip_dir)) {
1282                         if (is_dir)
1283                                 file->flags |= FLAG_MISSING_DIR;
1284 #ifdef SUPPORT_HARD_LINKS
1285                         else if (F_IS_HLINKED(file))
1286                                 handle_skipped_hlink(file, itemizing, code, f_out);
1287 #endif
1288                         return;
1289                 }
1290                 skip_dir = NULL;
1291         }
1292
1293 #ifdef SUPPORT_ACLS
1294         sx.acc_acl = sx.def_acl = NULL;
1295 #endif
1296 #ifdef SUPPORT_XATTRS
1297         sx.xattr = NULL;
1298 #endif
1299         if (daemon_filter_list.head && (*fname != '.' || fname[1])) {
1300                 if (check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
1301                         if (is_dir < 0)
1302                                 return;
1303 #ifdef SUPPORT_HARD_LINKS
1304                         if (F_IS_HLINKED(file))
1305                                 handle_skipped_hlink(file, itemizing, code, f_out);
1306 #endif
1307                         rprintf(FERROR_XFER,
1308                                 "skipping daemon-excluded %s \"%s\"\n",
1309                                 is_dir ? "directory" : "file", fname);
1310                         if (is_dir)
1311                                 goto skipping_dir_contents;
1312                         return;
1313                 }
1314         }
1315
1316         if (dry_run > 1 || (dry_missing_dir && is_below(file, dry_missing_dir))) {
1317           parent_is_dry_missing:
1318                 if (fuzzy_dirlist) {
1319                         flist_free(fuzzy_dirlist);
1320                         fuzzy_dirlist = NULL;
1321                 }
1322                 parent_dirname = "";
1323                 statret = -1;
1324                 stat_errno = ENOENT;
1325         } else {
1326                 const char *dn = file->dirname ? file->dirname : ".";
1327                 dry_missing_dir = NULL;
1328                 if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
1329                         if (relative_paths && !implied_dirs
1330                          && do_stat(dn, &sx.st) < 0) {
1331                                 if (dry_run)
1332                                         goto parent_is_dry_missing;
1333                                 if (create_directory_path(fname) < 0) {
1334                                         rsyserr(FERROR_XFER, errno,
1335                                                 "recv_generator: mkdir %s failed",
1336                                                 full_fname(dn));
1337                                 }
1338                         }
1339                         if (fuzzy_dirlist) {
1340                                 flist_free(fuzzy_dirlist);
1341                                 fuzzy_dirlist = NULL;
1342                         }
1343                         if (fuzzy_basis)
1344                                 need_fuzzy_dirlist = 1;
1345 #ifdef SUPPORT_ACLS
1346                         if (!preserve_perms)
1347                                 dflt_perms = default_perms_for_dir(dn);
1348 #endif
1349                 }
1350                 parent_dirname = dn;
1351
1352                 if (need_fuzzy_dirlist && S_ISREG(file->mode)) {
1353                         strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf);
1354                         fuzzy_dirlist = get_dirlist(fnamecmpbuf, -1, GDL_IGNORE_FILTER_RULES);
1355                         need_fuzzy_dirlist = 0;
1356                 }
1357
1358                 statret = link_stat(fname, &sx.st, keep_dirlinks && is_dir);
1359                 stat_errno = errno;
1360         }
1361
1362         if (ignore_non_existing > 0 && statret == -1 && stat_errno == ENOENT) {
1363                 if (is_dir) {
1364                         if (is_dir < 0)
1365                                 return;
1366                         skip_dir = file;
1367                         file->flags |= FLAG_MISSING_DIR;
1368                 }
1369 #ifdef SUPPORT_HARD_LINKS
1370                 else if (F_IS_HLINKED(file))
1371                         handle_skipped_hlink(file, itemizing, code, f_out);
1372 #endif
1373                 if (verbose > 1) {
1374                         rprintf(FINFO, "not creating new %s \"%s\"\n",
1375                                 is_dir ? "directory" : "file", fname);
1376                 }
1377                 return;
1378         }
1379
1380         if (statret == 0 && !(sx.st.st_mode & S_IWUSR)
1381          && !am_root && sx.st.st_uid == our_uid)
1382                 del_opts |= DEL_NO_UID_WRITE;
1383
1384         if (ignore_existing > 0 && statret == 0
1385          && (!is_dir || !S_ISDIR(sx.st.st_mode))) {
1386                 if (verbose > 1 && is_dir >= 0)
1387                         rprintf(FINFO, "%s exists\n", fname);
1388 #ifdef SUPPORT_HARD_LINKS
1389                 if (F_IS_HLINKED(file))
1390                         handle_skipped_hlink(file, itemizing, code, f_out);
1391 #endif
1392                 goto cleanup;
1393         }
1394
1395         fnamecmp = fname;
1396
1397         if (is_dir) {
1398                 mode_t added_perms;
1399                 if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
1400                         goto cleanup;
1401                 if (am_root < 0) {
1402                         /* For --fake-super, the dir must be useable by the copying
1403                          * user, just like it would be for root. */
1404                         added_perms = S_IRUSR|S_IWUSR|S_IXUSR;
1405                 } else
1406                         added_perms = 0;
1407                 if (is_dir < 0) {
1408                         /* In inc_recurse mode we want to make sure any missing
1409                          * directories get created while we're still processing
1410                          * the parent dir (which allows us to touch the parent
1411                          * dir's mtime right away).  We will handle the dir in
1412                          * full later (right before we handle its contents). */
1413                         if (statret == 0
1414                          && (S_ISDIR(sx.st.st_mode)
1415                           || delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0))
1416                                 goto cleanup; /* Any errors get reported later. */
1417                         if (do_mkdir(fname, (file->mode|added_perms) & 0700) == 0)
1418                                 file->flags |= FLAG_DIR_CREATED;
1419                         goto cleanup;
1420                 }
1421                 /* The file to be received is a directory, so we need
1422                  * to prepare appropriately.  If there is already a
1423                  * file of that name and it is *not* a directory, then
1424                  * we need to delete it.  If it doesn't exist, then
1425                  * (perhaps recursively) create it. */
1426                 if (statret == 0 && !S_ISDIR(sx.st.st_mode)) {
1427                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0)
1428                                 goto skipping_dir_contents;
1429                         statret = -1;
1430                 }
1431                 if (dry_run && statret != 0) {
1432                         if (!dry_missing_dir)
1433                                 dry_missing_dir = file;
1434                         file->flags |= FLAG_MISSING_DIR;
1435                 }
1436                 real_ret = statret;
1437                 real_sx = sx;
1438                 if (file->flags & FLAG_DIR_CREATED)
1439                         statret = -1;
1440                 if (!preserve_perms) { /* See comment in non-dir code below. */
1441                         file->mode = dest_mode(file->mode, sx.st.st_mode,
1442                                                dflt_perms, statret == 0);
1443                 }
1444                 if (statret != 0 && basis_dir[0] != NULL) {
1445                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1446                                               itemizing, code);
1447                         if (j == -2) {
1448                                 itemizing = 0;
1449                                 code = FNONE;
1450                                 statret = 1;
1451                         } else if (j >= 0) {
1452                                 statret = 1;
1453                                 fnamecmp = fnamecmpbuf;
1454                         }
1455                 }
1456                 if (itemizing && f_out != -1) {
1457                         itemize(fnamecmp, file, ndx, statret, &sx,
1458                                 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
1459                 }
1460                 if (real_ret != 0 && do_mkdir(fname,file->mode|added_perms) < 0 && errno != EEXIST) {
1461                         if (!relative_paths || errno != ENOENT
1462                          || create_directory_path(fname) < 0
1463                          || (do_mkdir(fname, file->mode|added_perms) < 0 && errno != EEXIST)) {
1464                                 rsyserr(FERROR_XFER, errno,
1465                                         "recv_generator: mkdir %s failed",
1466                                         full_fname(fname));
1467                           skipping_dir_contents:
1468                                 rprintf(FERROR,
1469                                     "*** Skipping any contents from this failed directory ***\n");
1470                                 skip_dir = file;
1471                                 file->flags |= FLAG_MISSING_DIR;
1472                                 goto cleanup;
1473                         }
1474                 }
1475 #ifdef SUPPORT_XATTRS
1476                 if (preserve_xattrs && statret == 1)
1477                         copy_xattrs(fnamecmpbuf, fname);
1478 #endif
1479                 if (set_file_attrs(fname, file, real_ret ? NULL : &real_sx, NULL, 0)
1480                     && verbose && code != FNONE && f_out != -1)
1481                         rprintf(code, "%s/\n", fname);
1482
1483                 /* We need to ensure that the dirs in the transfer have writable
1484                  * permissions during the time we are putting files within them.
1485                  * This is then fixed after the transfer is done. */
1486 #ifdef HAVE_CHMOD
1487                 if (!am_root && !(file->mode & S_IWUSR) && dir_tweaking) {
1488                         mode_t mode = file->mode | S_IWUSR;
1489                         if (do_chmod(fname, mode) < 0) {
1490                                 rsyserr(FERROR_XFER, errno,
1491                                         "failed to modify permissions on %s",
1492                                         full_fname(fname));
1493                         }
1494                         need_retouch_dir_perms = 1;
1495                 }
1496 #endif
1497
1498                 if (real_ret != 0 && one_file_system)
1499                         real_sx.st.st_dev = filesystem_dev;
1500                 if (inc_recurse) {
1501                         if (one_file_system) {
1502                                 uint32 *devp = F_DIR_DEV_P(file);
1503                                 DEV_MAJOR(devp) = major(real_sx.st.st_dev);
1504                                 DEV_MINOR(devp) = minor(real_sx.st.st_dev);
1505                         }
1506                 }
1507                 else if (delete_during && f_out != -1 && !phase
1508                     && !(file->flags & FLAG_MISSING_DIR)) {
1509                         if (file->flags & FLAG_CONTENT_DIR)
1510                                 delete_in_dir(fname, file, &real_sx.st.st_dev);
1511                         else
1512                                 change_local_filter_dir(fname, strlen(fname), F_DEPTH(file));
1513                 }
1514                 goto cleanup;
1515         }
1516
1517         /* If we're not preserving permissions, change the file-list's
1518          * mode based on the local permissions and some heuristics. */
1519         if (!preserve_perms) {
1520                 int exists = statret == 0 && !S_ISDIR(sx.st.st_mode);
1521                 file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms,
1522                                        exists);
1523         }
1524
1525 #ifdef SUPPORT_HARD_LINKS
1526         if (preserve_hard_links && F_HLINK_NOT_FIRST(file)
1527          && hard_link_check(file, ndx, fname, statret, &sx, itemizing, code))
1528                 goto cleanup;
1529 #endif
1530
1531         if (preserve_links && S_ISLNK(file->mode)) {
1532 #ifdef SUPPORT_LINKS
1533                 const char *sl = F_SYMLINK(file);
1534                 if (safe_symlinks && unsafe_symlink(sl, fname)) {
1535                         if (verbose) {
1536                                 if (solo_file) {
1537                                         /* fname contains the destination path, but we
1538                                          * want to report the source path. */
1539                                         fname = f_name(file, NULL);
1540                                 }
1541                                 rprintf(FINFO,
1542                                         "ignoring unsafe symlink \"%s\" -> \"%s\"\n",
1543                                         fname, sl);
1544                         }
1545                         return;
1546                 }
1547                 if (statret == 0) {
1548                         char lnk[MAXPATHLEN];
1549                         int len;
1550
1551                         if (!S_ISLNK(sx.st.st_mode))
1552                                 statret = -1;
1553                         else if ((len = readlink(fname, lnk, MAXPATHLEN-1)) > 0
1554                               && strncmp(lnk, sl, len) == 0 && sl[len] == '\0') {
1555                                 /* The link is pointing to the right place. */
1556                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1557                                 if (itemizing)
1558                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1559 #if defined SUPPORT_HARD_LINKS && defined CAN_HARDLINK_SYMLINK
1560                                 if (preserve_hard_links && F_IS_HLINKED(file))
1561                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1562 #endif
1563                                 if (remove_source_files == 1)
1564                                         goto return_with_success;
1565                                 goto cleanup;
1566                         }
1567                         /* Not the right symlink (or not a symlink), so
1568                          * delete it. */
1569                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_SYMLINK) != 0)
1570                                 goto cleanup;
1571                 } else if (basis_dir[0] != NULL) {
1572                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1573                                               itemizing, code);
1574                         if (j == -2) {
1575 #ifndef CAN_HARDLINK_SYMLINK
1576                                 if (link_dest) {
1577                                         /* Resort to --copy-dest behavior. */
1578                                 } else
1579 #endif
1580                                 if (!copy_dest)
1581                                         goto cleanup;
1582                                 itemizing = 0;
1583                                 code = FNONE;
1584                         } else if (j >= 0)
1585                                 statret = 1;
1586                 }
1587 #ifdef SUPPORT_HARD_LINKS
1588                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1589                         cur_flist->in_progress++;
1590                         goto cleanup;
1591                 }
1592 #endif
1593                 if (do_symlink(sl, fname) != 0) {
1594                         rsyserr(FERROR_XFER, errno, "symlink %s -> \"%s\" failed",
1595                                 full_fname(fname), sl);
1596                 } else {
1597                         set_file_attrs(fname, file, NULL, NULL, 0);
1598                         if (itemizing) {
1599                                 itemize(fname, file, ndx, statret, &sx,
1600                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1601                         }
1602                         if (code != FNONE && verbose)
1603                                 rprintf(code, "%s -> %s\n", fname, sl);
1604 #ifdef SUPPORT_HARD_LINKS
1605                         if (preserve_hard_links && F_IS_HLINKED(file))
1606                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1607 #endif
1608                         /* This does not check remove_source_files == 1
1609                          * because this is one of the items that the old
1610                          * --remove-sent-files option would remove. */
1611                         if (remove_source_files)
1612                                 goto return_with_success;
1613                 }
1614 #endif
1615                 goto cleanup;
1616         }
1617
1618         if ((am_root && preserve_devices && IS_DEVICE(file->mode))
1619          || (preserve_specials && IS_SPECIAL(file->mode))) {
1620                 dev_t rdev;
1621                 if (IS_DEVICE(file->mode)) {
1622                         uint32 *devp = F_RDEV_P(file);
1623                         rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
1624                 } else
1625                         rdev = 0;
1626                 if (statret == 0) {
1627                         int del_for_flag;
1628                         if (IS_DEVICE(file->mode)) {
1629                                 if (!IS_DEVICE(sx.st.st_mode))
1630                                         statret = -1;
1631                                 del_for_flag = DEL_FOR_DEVICE;
1632                         } else {
1633                                 if (!IS_SPECIAL(sx.st.st_mode))
1634                                         statret = -1;
1635                                 del_for_flag = DEL_FOR_SPECIAL;
1636                         }
1637                         if (statret == 0
1638                          && BITS_EQUAL(sx.st.st_mode, file->mode, _S_IFMT)
1639                          && (IS_SPECIAL(sx.st.st_mode) || sx.st.st_rdev == rdev)) {
1640                                 /* The device or special file is identical. */
1641                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1642                                 if (itemizing)
1643                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1644 #ifdef SUPPORT_HARD_LINKS
1645                                 if (preserve_hard_links && F_IS_HLINKED(file))
1646                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1647 #endif
1648                                 if (remove_source_files == 1)
1649                                         goto return_with_success;
1650                                 goto cleanup;
1651                         }
1652                         if (delete_item(fname, sx.st.st_mode, del_opts | del_for_flag) != 0)
1653                                 goto cleanup;
1654                 } else if (basis_dir[0] != NULL) {
1655                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1656                                               itemizing, code);
1657                         if (j == -2) {
1658 #ifndef CAN_HARDLINK_SPECIAL
1659                                 if (link_dest) {
1660                                         /* Resort to --copy-dest behavior. */
1661                                 } else
1662 #endif
1663                                 if (!copy_dest)
1664                                         goto cleanup;
1665                                 itemizing = 0;
1666                                 code = FNONE;
1667                         } else if (j >= 0)
1668                                 statret = 1;
1669                 }
1670 #ifdef SUPPORT_HARD_LINKS
1671                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1672                         cur_flist->in_progress++;
1673                         goto cleanup;
1674                 }
1675 #endif
1676                 if (verbose > 2) {
1677                         rprintf(FINFO, "mknod(%s, 0%o, [%ld,%ld])\n",
1678                                 fname, (int)file->mode,
1679                                 (long)major(rdev), (long)minor(rdev));
1680                 }
1681                 if (do_mknod(fname, file->mode, rdev) < 0) {
1682                         rsyserr(FERROR_XFER, errno, "mknod %s failed",
1683                                 full_fname(fname));
1684                 } else {
1685                         set_file_attrs(fname, file, NULL, NULL, 0);
1686                         if (itemizing) {
1687                                 itemize(fname, file, ndx, statret, &sx,
1688                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1689                         }
1690                         if (code != FNONE && verbose)
1691                                 rprintf(code, "%s\n", fname);
1692 #ifdef SUPPORT_HARD_LINKS
1693                         if (preserve_hard_links && F_IS_HLINKED(file))
1694                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1695 #endif
1696                         if (remove_source_files == 1)
1697                                 goto return_with_success;
1698                 }
1699                 goto cleanup;
1700         }
1701
1702         if (!S_ISREG(file->mode)) {
1703                 if (solo_file)
1704                         fname = f_name(file, NULL);
1705                 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1706                 goto cleanup;
1707         }
1708
1709         if (max_size > 0 && F_LENGTH(file) > max_size) {
1710                 if (verbose > 1) {
1711                         if (solo_file)
1712                                 fname = f_name(file, NULL);
1713                         rprintf(FINFO, "%s is over max-size\n", fname);
1714                 }
1715                 goto cleanup;
1716         }
1717         if (min_size > 0 && F_LENGTH(file) < min_size) {
1718                 if (verbose > 1) {
1719                         if (solo_file)
1720                                 fname = f_name(file, NULL);
1721                         rprintf(FINFO, "%s is under min-size\n", fname);
1722                 }
1723                 goto cleanup;
1724         }
1725
1726         if (update_only > 0 && statret == 0
1727             && cmp_time(sx.st.st_mtime, file->modtime) > 0) {
1728                 if (verbose > 1)
1729                         rprintf(FINFO, "%s is newer\n", fname);
1730 #ifdef SUPPORT_HARD_LINKS
1731                 if (F_IS_HLINKED(file))
1732                         handle_skipped_hlink(file, itemizing, code, f_out);
1733 #endif
1734                 goto cleanup;
1735         }
1736
1737         fnamecmp_type = FNAMECMP_FNAME;
1738
1739         if (statret == 0 && !S_ISREG(sx.st.st_mode)) {
1740                 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_FILE) != 0)
1741                         goto cleanup;
1742                 statret = -1;
1743                 stat_errno = ENOENT;
1744         }
1745
1746         if (statret != 0 && basis_dir[0] != NULL) {
1747                 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &sx,
1748                                       itemizing, code);
1749                 if (j == -2) {
1750                         if (remove_source_files == 1)
1751                                 goto return_with_success;
1752                         goto cleanup;
1753                 }
1754                 if (j >= 0) {
1755                         fnamecmp = fnamecmpbuf;
1756                         fnamecmp_type = j;
1757                         statret = 0;
1758                 }
1759         }
1760
1761         real_ret = statret;
1762         real_sx = sx;
1763
1764         if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1765             && link_stat(partialptr, &partial_st, 0) == 0
1766             && S_ISREG(partial_st.st_mode)) {
1767                 if (statret != 0)
1768                         goto prepare_to_open;
1769         } else
1770                 partialptr = NULL;
1771
1772         if (statret != 0 && fuzzy_dirlist) {
1773                 int j = find_fuzzy(file, fuzzy_dirlist);
1774                 if (j >= 0) {
1775                         fuzzy_file = fuzzy_dirlist->files[j];
1776                         f_name(fuzzy_file, fnamecmpbuf);
1777                         if (verbose > 2) {
1778                                 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1779                                         fname, fnamecmpbuf);
1780                         }
1781                         sx.st.st_size = F_LENGTH(fuzzy_file);
1782                         statret = 0;
1783                         fnamecmp = fnamecmpbuf;
1784                         fnamecmp_type = FNAMECMP_FUZZY;
1785                 }
1786         }
1787
1788         if (statret != 0) {
1789 #ifdef SUPPORT_HARD_LINKS
1790                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1791                         cur_flist->in_progress++;
1792                         goto cleanup;
1793                 }
1794 #endif
1795                 if (stat_errno == ENOENT)
1796                         goto notify_others;
1797                 rsyserr(FERROR_XFER, stat_errno, "recv_generator: failed to stat %s",
1798                         full_fname(fname));
1799                 goto cleanup;
1800         }
1801
1802         if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1803                 ;
1804         else if (fnamecmp_type == FNAMECMP_FUZZY)
1805                 ;
1806         else if (unchanged_file(fnamecmp, file, &sx.st)) {
1807                 if (partialptr) {
1808                         do_unlink(partialptr);
1809                         handle_partial_dir(partialptr, PDIR_DELETE);
1810                 }
1811                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1812                 if (itemizing)
1813                         itemize(fnamecmp, file, ndx, statret, &sx, 0, 0, NULL);
1814 #ifdef SUPPORT_HARD_LINKS
1815                 if (preserve_hard_links && F_IS_HLINKED(file))
1816                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1817 #endif
1818                 if (remove_source_files != 1)
1819                         goto cleanup;
1820           return_with_success:
1821                 if (!dry_run)
1822                         send_msg_int(MSG_SUCCESS, ndx);
1823                 goto cleanup;
1824         }
1825
1826         if (append_mode > 0 && sx.st.st_size >= F_LENGTH(file)) {
1827 #ifdef SUPPORT_HARD_LINKS
1828                 if (F_IS_HLINKED(file))
1829                         handle_skipped_hlink(file, itemizing, code, f_out);
1830 #endif
1831                 goto cleanup;
1832         }
1833
1834   prepare_to_open:
1835         if (partialptr) {
1836                 sx.st = partial_st;
1837                 fnamecmp = partialptr;
1838                 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1839                 statret = 0;
1840         }
1841
1842         if (!do_xfers)
1843                 goto notify_others;
1844
1845         if (read_batch || whole_file) {
1846                 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1847                         if (!(backupptr = get_backup_name(fname)))
1848                                 goto cleanup;
1849                         if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
1850                                 goto pretend_missing;
1851                         if (copy_file(fname, backupptr, -1, back_file->mode, 1) < 0) {
1852                                 unmake_file(back_file);
1853                                 back_file = NULL;
1854                                 goto cleanup;
1855                         }
1856                 }
1857                 goto notify_others;
1858         }
1859
1860         if (fuzzy_dirlist) {
1861                 int j = flist_find(fuzzy_dirlist, file);
1862                 if (j >= 0) /* don't use changing file as future fuzzy basis */
1863                         fuzzy_dirlist->files[j]->flags |= FLAG_FILE_SENT;
1864         }
1865
1866         /* open the file */
1867         if ((fd = do_open(fnamecmp, O_RDONLY, 0)) < 0) {
1868                 rsyserr(FERROR, errno, "failed to open %s, continuing",
1869                         full_fname(fnamecmp));
1870           pretend_missing:
1871                 /* pretend the file didn't exist */
1872 #ifdef SUPPORT_HARD_LINKS
1873                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1874                         cur_flist->in_progress++;
1875                         goto cleanup;
1876                 }
1877 #endif
1878                 statret = real_ret = -1;
1879                 goto notify_others;
1880         }
1881
1882         if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1883                 if (!(backupptr = get_backup_name(fname))) {
1884                         close(fd);
1885                         goto cleanup;
1886                 }
1887                 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1888                         close(fd);
1889                         goto pretend_missing;
1890                 }
1891                 if (robust_unlink(backupptr) && errno != ENOENT) {
1892                         rsyserr(FERROR_XFER, errno, "unlink %s",
1893                                 full_fname(backupptr));
1894                         unmake_file(back_file);
1895                         back_file = NULL;
1896                         close(fd);
1897                         goto cleanup;
1898                 }
1899                 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1900                         int save_errno = errno ? errno : EINVAL; /* 0 paranoia */
1901                         if (errno == ENOENT && make_bak_dir(backupptr) == 0) {
1902                                 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0)
1903                                         save_errno = errno ? errno : save_errno;
1904                                 else
1905                                         save_errno = 0;
1906                         }
1907                         if (save_errno) {
1908                                 rsyserr(FERROR_XFER, save_errno, "open %s", full_fname(backupptr));
1909                                 unmake_file(back_file);
1910                                 back_file = NULL;
1911                                 close(fd);
1912                                 goto cleanup;
1913                         }
1914                 }
1915                 fnamecmp_type = FNAMECMP_BACKUP;
1916         }
1917
1918         if (verbose > 3) {
1919                 rprintf(FINFO, "gen mapped %s of size %.0f\n",
1920                         fnamecmp, (double)sx.st.st_size);
1921         }
1922
1923         if (verbose > 2)
1924                 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1925
1926   notify_others:
1927         if (remove_source_files && !delay_updates && !phase && !dry_run)
1928                 increment_active_files(ndx, itemizing, code);
1929         if (inc_recurse && !dry_run)
1930                 cur_flist->in_progress++;
1931 #ifdef SUPPORT_HARD_LINKS
1932         if (preserve_hard_links && F_IS_HLINKED(file))
1933                 file->flags |= FLAG_FILE_SENT;
1934 #endif
1935         write_ndx(f_out, ndx);
1936         if (itemizing) {
1937                 int iflags = ITEM_TRANSFER;
1938                 if (always_checksum > 0)
1939                         iflags |= ITEM_REPORT_CHANGE;
1940                 if (fnamecmp_type != FNAMECMP_FNAME)
1941                         iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1942                 if (fnamecmp_type == FNAMECMP_FUZZY)
1943                         iflags |= ITEM_XNAME_FOLLOWS;
1944                 itemize(fnamecmp, file, -1, real_ret, &real_sx, iflags, fnamecmp_type,
1945                         fuzzy_file ? fuzzy_file->basename : NULL);
1946 #ifdef SUPPORT_ACLS
1947                 if (preserve_acls)
1948                         free_acl(&real_sx);
1949 #endif
1950 #ifdef SUPPORT_XATTRS
1951                 if (preserve_xattrs)
1952                         free_xattr(&real_sx);
1953 #endif
1954         }
1955
1956         if (!do_xfers) {
1957 #ifdef SUPPORT_HARD_LINKS
1958                 if (preserve_hard_links && F_IS_HLINKED(file))
1959                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1960 #endif
1961                 goto cleanup;
1962         }
1963         if (read_batch)
1964                 goto cleanup;
1965
1966         if (statret != 0 || whole_file)
1967                 write_sum_head(f_out, NULL);
1968         else if (sx.st.st_size <= 0) {
1969                 write_sum_head(f_out, NULL);
1970                 close(fd);
1971         } else {
1972                 if (generate_and_send_sums(fd, sx.st.st_size, f_out, f_copy) < 0) {
1973                         rprintf(FWARNING,
1974                             "WARNING: file is too large for checksum sending: %s\n",
1975                             fnamecmp);
1976                         write_sum_head(f_out, NULL);
1977                 }
1978                 close(fd);
1979         }
1980
1981   cleanup:
1982         if (back_file) {
1983                 int save_preserve_xattrs = preserve_xattrs;
1984                 if (f_copy >= 0)
1985                         close(f_copy);
1986 #ifdef SUPPORT_XATTRS
1987                 if (preserve_xattrs) {
1988                         copy_xattrs(fname, backupptr);
1989                         preserve_xattrs = 0;
1990                 }
1991 #endif
1992                 set_file_attrs(backupptr, back_file, NULL, NULL, 0);
1993                 preserve_xattrs = save_preserve_xattrs;
1994                 if (verbose > 1) {
1995                         rprintf(FINFO, "backed up %s to %s\n",
1996                                 fname, backupptr);
1997                 }
1998                 unmake_file(back_file);
1999         }
2000
2001 #ifdef SUPPORT_ACLS
2002         if (preserve_acls)
2003                 free_acl(&sx);
2004 #endif
2005 #ifdef SUPPORT_XATTRS
2006         if (preserve_xattrs)
2007                 free_xattr(&sx);
2008 #endif
2009         return;
2010 }
2011
2012 #ifdef SUPPORT_HARD_LINKS
2013 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
2014                                  enum logcode code, int f_out)
2015 {
2016         char fbuf[MAXPATHLEN];
2017         int new_last_ndx;
2018         struct file_list *save_flist = cur_flist;
2019
2020         /* If we skip the last item in a chain of links and there was a
2021          * prior non-skipped hard-link waiting to finish, finish it now. */
2022         if ((new_last_ndx = skip_hard_link(file, &cur_flist)) < 0)
2023                 return;
2024
2025         file = cur_flist->files[new_last_ndx - cur_flist->ndx_start];
2026         cur_flist->in_progress--; /* undo prior increment */
2027         f_name(file, fbuf);
2028         recv_generator(fbuf, file, new_last_ndx, itemizing, code, f_out);
2029
2030         cur_flist = save_flist;
2031 }
2032 #endif
2033
2034 static void touch_up_dirs(struct file_list *flist, int ndx)
2035 {
2036         static int counter = 0;
2037         struct file_struct *file;
2038         char *fname;
2039         BOOL fix_dir_perms;
2040         int i, start, end;
2041
2042         if (ndx < 0) {
2043                 start = 0;
2044                 end = flist->used - 1;
2045         } else
2046                 start = end = ndx;
2047
2048         /* Fix any directory permissions that were modified during the
2049          * transfer and/or re-set any tweaked modified-time values. */
2050         for (i = start; i <= end; i++, counter++) {
2051                 file = flist->files[i];
2052                 if (!S_ISDIR(file->mode)
2053                  || (!implied_dirs && file->flags & FLAG_IMPLIED_DIR))
2054                         continue;
2055                 if (verbose > 3) {
2056                         fname = f_name(file, NULL);
2057                         rprintf(FINFO, "touch_up_dirs: %s (%d)\n",
2058                                 NS(fname), i);
2059                 }
2060                 /* Be sure not to retouch permissions with --fake-super. */
2061                 fix_dir_perms = !am_root && !(file->mode & S_IWUSR);
2062                 if (!F_IS_ACTIVE(file) || file->flags & FLAG_MISSING_DIR
2063                  || !(need_retouch_dir_times || fix_dir_perms))
2064                         continue;
2065                 fname = f_name(file, NULL);
2066                 if (fix_dir_perms)
2067                         do_chmod(fname, file->mode);
2068                 if (need_retouch_dir_times) {
2069                         STRUCT_STAT st;
2070                         if (link_stat(fname, &st, 0) == 0
2071                          && cmp_time(st.st_mtime, file->modtime) != 0)
2072                                 set_modtime(fname, file->modtime, file->mode);
2073                 }
2074                 if (counter >= loopchk_limit) {
2075                         if (allowed_lull)
2076                                 maybe_send_keepalive();
2077                         else
2078                                 maybe_flush_socket(0);
2079                         counter = 0;
2080                 }
2081         }
2082 }
2083
2084 void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
2085 {
2086         struct file_struct *file;
2087         struct file_list *flist;
2088         char fbuf[MAXPATHLEN];
2089         int ndx;
2090
2091         while (1) {
2092 #ifdef SUPPORT_HARD_LINKS
2093                 if (preserve_hard_links && (ndx = get_hlink_num()) != -1) {
2094                         flist = flist_for_ndx(ndx, "check_for_finished_files.1");
2095                         file = flist->files[ndx - flist->ndx_start];
2096                         assert(file->flags & FLAG_HLINKED);
2097                         finish_hard_link(file, f_name(file, fbuf), ndx, NULL, itemizing, code, -1);
2098                         flist->in_progress--;
2099                         continue;
2100                 }
2101 #endif
2102
2103                 if (check_redo && (ndx = get_redo_num()) != -1) {
2104                         csum_length = SUM_LENGTH;
2105                         max_size = -max_size;
2106                         min_size = -min_size;
2107                         ignore_existing = -ignore_existing;
2108                         ignore_non_existing = -ignore_non_existing;
2109                         update_only = -update_only;
2110                         always_checksum = -always_checksum;
2111                         size_only = -size_only;
2112                         append_mode = -append_mode;
2113                         make_backups = -make_backups; /* avoid dup backup w/inplace */
2114                         ignore_times++;
2115
2116                         flist = cur_flist;
2117                         cur_flist = flist_for_ndx(ndx, "check_for_finished_files.2");
2118
2119                         file = cur_flist->files[ndx - cur_flist->ndx_start];
2120                         if (solo_file)
2121                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2122                         else
2123                                 f_name(file, fbuf);
2124                         recv_generator(fbuf, file, ndx, itemizing, code, sock_f_out);
2125                         cur_flist->to_redo--;
2126
2127                         cur_flist = flist;
2128
2129                         csum_length = SHORT_SUM_LENGTH;
2130                         max_size = -max_size;
2131                         min_size = -min_size;
2132                         ignore_existing = -ignore_existing;
2133                         ignore_non_existing = -ignore_non_existing;
2134                         update_only = -update_only;
2135                         always_checksum = -always_checksum;
2136                         size_only = -size_only;
2137                         append_mode = -append_mode;
2138                         make_backups = -make_backups;
2139                         ignore_times--;
2140                         continue;
2141                 }
2142
2143                 if (cur_flist == first_flist)
2144                         break;
2145
2146                 /* We only get here if inc_recurse is enabled. */
2147                 if (first_flist->in_progress || first_flist->to_redo)
2148                         break;
2149
2150                 write_ndx(sock_f_out, NDX_DONE);
2151                 if (!read_batch)
2152                         maybe_flush_socket(1);
2153
2154                 if (delete_during == 2 || !dir_tweaking) {
2155                         /* Skip directory touch-up. */
2156                 } else if (first_flist->parent_ndx >= 0)
2157                         touch_up_dirs(dir_flist, first_flist->parent_ndx);
2158
2159                 flist_free(first_flist); /* updates first_flist */
2160         }
2161 }
2162
2163 void generate_files(int f_out, const char *local_name)
2164 {
2165         int i, ndx, next_loopchk = 0;
2166         char fbuf[MAXPATHLEN];
2167         int itemizing;
2168         enum logcode code;
2169         int save_do_progress = do_progress;
2170
2171         if (protocol_version >= 29) {
2172                 itemizing = 1;
2173                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2174                 code = logfile_format_has_i ? FNONE : FLOG;
2175         } else if (am_daemon) {
2176                 itemizing = logfile_format_has_i && do_xfers;
2177                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2178                 code = itemizing || !do_xfers ? FCLIENT : FINFO;
2179         } else if (!am_server) {
2180                 itemizing = stdout_format_has_i;
2181                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2182                 code = itemizing ? FNONE : FINFO;
2183         } else {
2184                 itemizing = 0;
2185                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2186                 code = FINFO;
2187         }
2188         solo_file = local_name;
2189         dir_tweaking = !(list_only || solo_file || dry_run);
2190         need_retouch_dir_times = preserve_times > 1;
2191         loopchk_limit = allowed_lull ? allowed_lull * 5 : 200;
2192         symlink_timeset_failed_flags = ITEM_REPORT_TIME
2193             | (protocol_version >= 30 || !am_server ? ITEM_REPORT_TIMEFAIL : 0);
2194         implied_dirs_are_missing = relative_paths && !implied_dirs && protocol_version < 30;
2195
2196         if (verbose > 2)
2197                 rprintf(FINFO, "generator starting pid=%ld\n", (long)getpid());
2198
2199         if (delete_before && !solo_file && cur_flist->used > 0)
2200                 do_delete_pass();
2201         if (delete_during == 2) {
2202                 deldelay_size = BIGPATHBUFLEN * 4;
2203                 deldelay_buf = new_array(char, deldelay_size);
2204                 if (!deldelay_buf)
2205                         out_of_memory("delete-delay");
2206         }
2207         do_progress = 0;
2208
2209         if (append_mode > 0 || whole_file < 0)
2210                 whole_file = 0;
2211         if (verbose >= 2) {
2212                 rprintf(FINFO, "delta-transmission %s\n",
2213                         whole_file
2214                         ? "disabled for local transfer or --whole-file"
2215                         : "enabled");
2216         }
2217
2218         /* Since we often fill up the outgoing socket and then just sit around
2219          * waiting for the other 2 processes to do their thing, we don't want
2220          * to exit on a timeout.  If the data stops flowing, the receiver will
2221          * notice that and let us know via the message pipe (or its closing). */
2222         ignore_timeout = 1;
2223
2224         dflt_perms = (ACCESSPERMS & ~orig_umask);
2225
2226         do {
2227 #ifdef SUPPORT_HARD_LINKS
2228                 if (preserve_hard_links && inc_recurse) {
2229                         while (!flist_eof && file_total < FILECNT_LOOKAHEAD/2)
2230                                 wait_for_receiver();
2231                 }
2232 #endif
2233
2234                 if (inc_recurse && cur_flist->parent_ndx >= 0) {
2235                         struct file_struct *fp = dir_flist->files[cur_flist->parent_ndx];
2236                         if (solo_file)
2237                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2238                         else
2239                                 f_name(fp, fbuf);
2240                         ndx = cur_flist->ndx_start - 1;
2241                         recv_generator(fbuf, fp, ndx, itemizing, code, f_out);
2242                         if (delete_during && dry_run < 2 && !list_only
2243                          && !(fp->flags & FLAG_MISSING_DIR)) {
2244                                 if (fp->flags & FLAG_CONTENT_DIR) {
2245                                         dev_t dirdev;
2246                                         if (one_file_system) {
2247                                                 uint32 *devp = F_DIR_DEV_P(fp);
2248                                                 dirdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
2249                                         } else
2250                                                 dirdev = MAKEDEV(0, 0);
2251                                         delete_in_dir(fbuf, fp, &dirdev);
2252                                 } else
2253                                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(fp));
2254                         }
2255                 }
2256                 for (i = cur_flist->low; i <= cur_flist->high; i++) {
2257                         struct file_struct *file = cur_flist->sorted[i];
2258
2259                         if (!F_IS_ACTIVE(file))
2260                                 continue;
2261
2262                         if (unsort_ndx)
2263                                 ndx = F_NDX(file);
2264                         else
2265                                 ndx = i + cur_flist->ndx_start;
2266
2267                         if (solo_file)
2268                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2269                         else
2270                                 f_name(file, fbuf);
2271                         recv_generator(fbuf, file, ndx, itemizing, code, f_out);
2272
2273                         check_for_finished_files(itemizing, code, 0);
2274
2275                         if (i + cur_flist->ndx_start >= next_loopchk) {
2276                                 if (allowed_lull)
2277                                         maybe_send_keepalive();
2278                                 else
2279                                         maybe_flush_socket(0);
2280                                 next_loopchk += loopchk_limit;
2281                         }
2282                 }
2283
2284                 if (!inc_recurse) {
2285                         write_ndx(f_out, NDX_DONE);
2286                         break;
2287                 }
2288
2289                 while (1) {
2290                         check_for_finished_files(itemizing, code, 1);
2291                         if (cur_flist->next || flist_eof)
2292                                 break;
2293                         wait_for_receiver();
2294                 }
2295         } while ((cur_flist = cur_flist->next) != NULL);
2296
2297         if (delete_during)
2298                 delete_in_dir(NULL, NULL, &dev_zero);
2299         phase++;
2300         if (verbose > 2)
2301                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2302
2303         while (1) {
2304                 check_for_finished_files(itemizing, code, 1);
2305                 if (msgdone_cnt)
2306                         break;
2307                 wait_for_receiver();
2308         }
2309
2310         phase++;
2311         if (verbose > 2)
2312                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2313
2314         write_ndx(f_out, NDX_DONE);
2315
2316         /* Reduce round-trip lag-time for a useless delay-updates phase. */
2317         if (protocol_version >= 29 && !delay_updates)
2318                 write_ndx(f_out, NDX_DONE);
2319
2320         /* Read MSG_DONE for the redo phase (and any prior messages). */
2321         while (1) {
2322                 check_for_finished_files(itemizing, code, 0);
2323                 if (msgdone_cnt > 1)
2324                         break;
2325                 wait_for_receiver();
2326         }
2327
2328         if (protocol_version >= 29) {
2329                 phase++;
2330                 if (verbose > 2)
2331                         rprintf(FINFO, "generate_files phase=%d\n", phase);
2332                 if (delay_updates)
2333                         write_ndx(f_out, NDX_DONE);
2334                 /* Read MSG_DONE for delay-updates phase & prior messages. */
2335                 while (msgdone_cnt == 2)
2336                         wait_for_receiver();
2337         }
2338
2339         do_progress = save_do_progress;
2340         if (delete_during == 2)
2341                 do_delayed_deletions(fbuf);
2342         if (delete_after && !solo_file && file_total > 0)
2343                 do_delete_pass();
2344
2345         if ((need_retouch_dir_perms || need_retouch_dir_times)
2346          && dir_tweaking && (!inc_recurse || delete_during == 2))
2347                 touch_up_dirs(dir_flist, -1);
2348
2349         if (max_delete >= 0 && deletion_count > max_delete) {
2350                 rprintf(FWARNING,
2351                         "Deletions stopped due to --max-delete limit (%d skipped)\n",
2352                         deletion_count - max_delete);
2353                 io_error |= IOERR_DEL_LIMIT;
2354         }
2355
2356         if (verbose > 2)
2357                 rprintf(FINFO, "generate_files finished\n");
2358 }