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