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