generator.c

   1 /*
   2  * Routines that are exclusive to the generator process.
   3  *
   4  * Copyright (C) 1996-2000 Andrew Tridgell
   5  * Copyright (C) 1996 Paul Mackerras
   6  * Copyright (C) 2002 Martin Pool <mbp@samba.org>
   7  * Copyright (C) 2003-2008 Wayne Davison
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 3 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, visit the http://fsf.org website.
  21  */
  22
  23 #include "rsync.h"
  24
  25 extern int verbose;
  26 extern int dry_run;
  27 extern int do_xfers;
  28 extern int stdout_format_has_i;
  29 extern int logfile_format_has_i;
  30 extern int am_root;
  31 extern int am_server;
  32 extern int am_daemon;
  33 extern int inc_recurse;
  34 extern int do_progress;
  35 extern int relative_paths;
  36 extern int implied_dirs;
  37 extern int keep_dirlinks;
  38 extern int preserve_acls;
  39 extern int preserve_xattrs;
  40 extern int preserve_links;
  41 extern int preserve_devices;
  42 extern int preserve_specials;
  43 extern int preserve_hard_links;
  44 extern int preserve_executability;
  45 extern int preserve_perms;
  46 extern int preserve_times;
  47 extern int uid_ndx;
  48 extern int gid_ndx;
  49 extern int delete_mode;
  50 extern int delete_before;
  51 extern int delete_during;
  52 extern int delete_after;
  53 extern int msgdone_cnt;
  54 extern int ignore_errors;
  55 extern int remove_source_files;
  56 extern int delay_updates;
  57 extern int update_only;
  58 extern int ignore_existing;
  59 extern int ignore_non_existing;
  60 extern int inplace;
  61 extern int append_mode;
  62 extern int make_backups;
  63 extern int csum_length;
  64 extern int ignore_times;
  65 extern int size_only;
  66 extern OFF_T max_size;
  67 extern OFF_T min_size;
  68 extern int io_error;
  69 extern int flist_eof;
  70 extern int allowed_lull;
  71 extern int sock_f_out;
  72 extern int ignore_timeout;
  73 extern int protocol_version;
  74 extern int file_total;
  75 extern int fuzzy_basis;
  76 extern int always_checksum;
  77 extern int checksum_len;
  78 extern char *partial_dir;
  79 extern char *basis_dir[];
  80 extern int compare_dest;
  81 extern int copy_dest;
  82 extern int link_dest;
  83 extern int whole_file;
  84 extern int list_only;
  85 extern int read_batch;
  86 extern int safe_symlinks;
  87 extern long block_size; /* "long" because popt can't set an int32. */
  88 extern int unsort_ndx;
  89 extern int max_delete;
  90 extern int force_delete;
  91 extern int one_file_system;
  92 extern struct stats stats;
  93 extern dev_t filesystem_dev;
  94 extern mode_t orig_umask;
  95 extern uid_t our_uid;
  96 extern char *backup_dir;
  97 extern char *backup_suffix;
  98 extern int backup_suffix_len;
  99 extern struct file_list *cur_flist, *first_flist, *dir_flist;
 100 extern struct filter_list_struct daemon_filter_list;
 101
 102 int ignore_perishable = 0;
 103 int non_perishable_cnt = 0;
 104 int maybe_ATTRS_REPORT = 0;
 105
 106 static dev_t dev_zero;
 107 static int deletion_count = 0; /* used to implement --max-delete */
 108 static int deldelay_size = 0, deldelay_cnt = 0;
 109 static char *deldelay_buf = NULL;
 110 static int deldelay_fd = -1;
 111 static int lull_mod;
 112 static int dir_tweaking;
 113 static int symlink_timeset_failed_flags;
 114 static int need_retouch_dir_times;
 115 static int need_retouch_dir_perms;
 116 static const char *solo_file = NULL;
 117
 118 /* For calling delete_item() and delete_dir_contents(). */
 119 #define DEL_NO_UID_WRITE        (1<<0) /* file/dir has our uid w/o write perm */
 120 #define DEL_RECURSE             (1<<1) /* if dir, delete all contents */
 121 #define DEL_DIR_IS_EMPTY        (1<<2) /* internal delete_FUNCTIONS use only */
 122 #define DEL_FOR_FILE            (1<<3) /* making room for a replacement file */
 123 #define DEL_FOR_DIR             (1<<4) /* making room for a replacement dir */
 124 #define DEL_FOR_SYMLINK         (1<<5) /* making room for a replacement symlink */
 125 #define DEL_FOR_DEVICE          (1<<6) /* making room for a replacement device */
 126 #define DEL_FOR_SPECIAL         (1<<7) /* making room for a replacement special */
 127
 128 #define DEL_MAKE_ROOM (DEL_FOR_FILE|DEL_FOR_DIR|DEL_FOR_SYMLINK|DEL_FOR_DEVICE|DEL_FOR_SPECIAL)
 129
 130 enum nonregtype {
 131     TYPE_DIR, TYPE_SPECIAL, TYPE_DEVICE, TYPE_SYMLINK
 132 };
 133
 134 enum delret {
 135     DR_SUCCESS = 0, DR_FAILURE, DR_AT_LIMIT, DR_NOT_EMPTY
 136 };
 137
 138 /* Forward declarations. */
 139 static enum delret delete_dir_contents(char *fname, uint16 flags);
 140 #ifdef SUPPORT_HARD_LINKS
 141 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
 142                                  enum logcode code, int f_out);
 143 #endif
 144
 145 static int is_backup_file(char *fn)
 146 {
 147         int k = strlen(fn) - backup_suffix_len;
 148         return k > 0 && strcmp(fn+k, backup_suffix) == 0;
 149 }
 150
 151 /* Delete a file or directory.  If DEL_RECURSE is set in the flags, this will
 152  * delete recursively.
 153  *
 154  * Note that fbuf must point to a MAXPATHLEN buffer if the mode indicates it's
 155  * a directory! (The buffer is used for recursion, but returned unchanged.)
 156  */
 157 static enum delret delete_item(char *fbuf, uint16 mode, uint16 flags)
 158 {
 159         enum delret ret;
 160         char *what;
 161         int ok;
 162
 163         if (verbose > 2) {
 164                 rprintf(FINFO, "delete_item(%s) mode=%o flags=%d\n",
 165                         fbuf, (int)mode, (int)flags);
 166         }
 167
 168         if (flags & DEL_NO_UID_WRITE)
 169                 do_chmod(fbuf, mode | S_IWUSR);
 170
 171         if (S_ISDIR(mode) && !(flags & DEL_DIR_IS_EMPTY)) {
 172                 int save_uid_ndx = uid_ndx;
 173                 /* This only happens on the first call to delete_item() since
 174                  * delete_dir_contents() always calls us w/DEL_DIR_IS_EMPTY. */
 175                 if (!uid_ndx)
 176                         uid_ndx = ++file_extra_cnt;
 177                 ignore_perishable = 1;
 178                 /* If DEL_RECURSE is not set, this just reports emptiness. */
 179                 ret = delete_dir_contents(fbuf, flags);
 180                 ignore_perishable = 0;
 181                 if (!save_uid_ndx) {
 182                         --file_extra_cnt;
 183                         uid_ndx = 0;
 184                 }
 185                 if (ret == DR_NOT_EMPTY || ret == DR_AT_LIMIT)
 186                         goto check_ret;
 187                 /* OK: try to delete the directory. */
 188         }
 189
 190         if (!(flags & DEL_MAKE_ROOM) && max_delete >= 0 && ++deletion_count > max_delete)
 191                 return DR_AT_LIMIT;
 192
 193         if (S_ISDIR(mode)) {
 194                 what = "rmdir";
 195                 ok = do_rmdir(fbuf) == 0;
 196         } else if (make_backups > 0 && (backup_dir || !is_backup_file(fbuf))) {
 197                 what = "make_backup";
 198                 ok = make_backup(fbuf);
 199         } else {
 200                 what = "unlink";
 201                 ok = robust_unlink(fbuf) == 0;
 202         }
 203
 204         if (ok) {
 205                 if (!(flags & DEL_MAKE_ROOM))
 206                         log_delete(fbuf, mode);
 207                 ret = DR_SUCCESS;
 208         } else {
 209                 if (S_ISDIR(mode) && errno == ENOTEMPTY) {
 210                         rprintf(FINFO, "cannot delete non-empty directory: %s\n",
 211                                 fbuf);
 212                         ret = DR_NOT_EMPTY;
 213                 } else if (errno != ENOENT) {
 214                         rsyserr(FERROR, errno, "delete_file: %s(%s) failed",
 215                                 what, fbuf);
 216                         ret = DR_FAILURE;
 217                 } else {
 218                         deletion_count--;
 219                         ret = DR_SUCCESS;
 220                 }
 221         }
 222
 223   check_ret:
 224         if (ret != DR_SUCCESS && flags & DEL_MAKE_ROOM) {
 225                 const char *desc;
 226                 switch (flags & DEL_MAKE_ROOM) {
 227                 case DEL_FOR_FILE: desc = "regular file"; break;
 228                 case DEL_FOR_DIR: desc = "directory"; break;
 229                 case DEL_FOR_SYMLINK: desc = "symlink"; break;
 230                 case DEL_FOR_DEVICE: desc = "device file"; break;
 231                 case DEL_FOR_SPECIAL: desc = "special file"; break;
 232                 default: exit_cleanup(RERR_UNSUPPORTED); /* IMPOSSIBLE */
 233                 }
 234                 rprintf(FERROR_XFER, "could not make way for new %s: %s\n",
 235                         desc, fbuf);
 236         }
 237         return ret;
 238 }
 239
 240 /* The directory is about to be deleted: if DEL_RECURSE is given, delete all
 241  * its contents, otherwise just checks for content.  Returns DR_SUCCESS or
 242  * DR_NOT_EMPTY.  Note that fname must point to a MAXPATHLEN buffer!  (The
 243  * buffer is used for recursion, but returned unchanged.)
 244  */
 245 static enum delret delete_dir_contents(char *fname, uint16 flags)
 246 {
 247         struct file_list *dirlist;
 248         enum delret ret;
 249         unsigned remainder;
 250         void *save_filters;
 251         int j, dlen;
 252         char *p;
 253
 254         if (verbose > 3) {
 255                 rprintf(FINFO, "delete_dir_contents(%s) flags=%d\n",
 256                         fname, flags);
 257         }
 258
 259         dlen = strlen(fname);
 260         save_filters = push_local_filters(fname, dlen);
 261
 262         non_perishable_cnt = 0;
 263         dirlist = get_dirlist(fname, dlen, 0);
 264         ret = non_perishable_cnt ? DR_NOT_EMPTY : DR_SUCCESS;
 265
 266         if (!dirlist->used)
 267                 goto done;
 268
 269         if (!(flags & DEL_RECURSE)) {
 270                 ret = DR_NOT_EMPTY;
 271                 goto done;
 272         }
 273
 274         p = fname + dlen;
 275         if (dlen != 1 || *fname != '/')
 276                 *p++ = '/';
 277         remainder = MAXPATHLEN - (p - fname);
 278
 279         /* We do our own recursion, so make delete_item() non-recursive. */
 280         flags = (flags & ~(DEL_RECURSE|DEL_MAKE_ROOM|DEL_NO_UID_WRITE))
 281               | DEL_DIR_IS_EMPTY;
 282
 283         for (j = dirlist->used; j--; ) {
 284                 struct file_struct *fp = dirlist->files[j];
 285
 286                 if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) {
 287                         if (verbose > 1) {
 288                                 rprintf(FINFO,
 289                                     "mount point, %s, pins parent directory\n",
 290                                     f_name(fp, NULL));
 291                         }
 292                         ret = DR_NOT_EMPTY;
 293                         continue;
 294                 }
 295
 296                 strlcpy(p, fp->basename, remainder);
 297                 if (!(fp->mode & S_IWUSR) && !am_root && (uid_t)F_OWNER(fp) == our_uid)
 298                         do_chmod(fname, fp->mode | S_IWUSR);
 299                 /* Save stack by recursing to ourself directly. */
 300                 if (S_ISDIR(fp->mode)) {
 301                         if (delete_dir_contents(fname, flags | DEL_RECURSE) != DR_SUCCESS)
 302                                 ret = DR_NOT_EMPTY;
 303                 }
 304                 if (delete_item(fname, fp->mode, flags) != DR_SUCCESS)
 305                         ret = DR_NOT_EMPTY;
 306         }
 307
 308         fname[dlen] = '\0';
 309
 310   done:
 311         flist_free(dirlist);
 312         pop_local_filters(save_filters);
 313
 314         if (ret == DR_NOT_EMPTY) {
 315                 rprintf(FINFO, "cannot delete non-empty directory: %s\n",
 316                         fname);
 317         }
 318         return ret;
 319 }
 320
 321 static int start_delete_delay_temp(void)
 322 {
 323         char fnametmp[MAXPATHLEN];
 324         int save_dry_run = dry_run;
 325
 326         dry_run = 0;
 327         if (!get_tmpname(fnametmp, "deldelay")
 328          || (deldelay_fd = do_mkstemp(fnametmp, 0600)) < 0) {
 329                 rprintf(FINFO, "NOTE: Unable to create delete-delay temp file%s.\n",
 330                         inc_recurse ? "" : " -- switching to --delete-after");
 331                 delete_during = 0;
 332                 delete_after = !inc_recurse;
 333                 dry_run = save_dry_run;
 334                 return 0;
 335         }
 336         unlink(fnametmp);
 337         dry_run = save_dry_run;
 338         return 1;
 339 }
 340
 341 static int flush_delete_delay(void)
 342 {
 343         if (deldelay_fd < 0 && !start_delete_delay_temp())
 344                 return 0;
 345         if (write(deldelay_fd, deldelay_buf, deldelay_cnt) != deldelay_cnt) {
 346                 rsyserr(FERROR, errno, "flush of delete-delay buffer");
 347                 delete_during = 0;
 348                 delete_after = !inc_recurse;
 349                 close(deldelay_fd);
 350                 return 0;
 351         }
 352         deldelay_cnt = 0;
 353         return 1;
 354 }
 355
 356 static int remember_delete(struct file_struct *file, const char *fname, int flags)
 357 {
 358         int len;
 359
 360         if (deldelay_cnt == deldelay_size && !flush_delete_delay())
 361                 return 0;
 362
 363         if (flags & DEL_NO_UID_WRITE)
 364                 deldelay_buf[deldelay_cnt++] = '!';
 365
 366         while (1) {
 367                 len = snprintf(deldelay_buf + deldelay_cnt,
 368                                deldelay_size - deldelay_cnt,
 369                                "%x %s%c",
 370                                (int)file->mode, fname, '\0');
 371                 if ((deldelay_cnt += len) <= deldelay_size)
 372                         break;
 373                 deldelay_cnt -= len;
 374                 if (!flush_delete_delay())
 375                         return 0;
 376         }
 377
 378         return 1;
 379 }
 380
 381 static int read_delay_line(char *buf, int *flags_p)
 382 {
 383         static int read_pos = 0;
 384         int j, len, mode;
 385         char *bp, *past_space;
 386
 387         while (1) {
 388                 for (j = read_pos; j < deldelay_cnt && deldelay_buf[j]; j++) {}
 389                 if (j < deldelay_cnt)
 390                         break;
 391                 if (deldelay_fd < 0) {
 392                         if (j > read_pos)
 393                                 goto invalid_data;
 394                         return -1;
 395                 }
 396                 deldelay_cnt -= read_pos;
 397                 if (deldelay_cnt == deldelay_size)
 398                         goto invalid_data;
 399                 if (deldelay_cnt && read_pos) {
 400                         memmove(deldelay_buf, deldelay_buf + read_pos,
 401                                 deldelay_cnt);
 402                 }
 403                 len = read(deldelay_fd, deldelay_buf + deldelay_cnt,
 404                            deldelay_size - deldelay_cnt);
 405                 if (len == 0) {
 406                         if (deldelay_cnt) {
 407                                 rprintf(FERROR,
 408                                     "ERROR: unexpected EOF in delete-delay file.\n");
 409                         }
 410                         return -1;
 411                 }
 412                 if (len < 0) {
 413                         rsyserr(FERROR, errno,
 414                                 "reading delete-delay file");
 415                         return -1;
 416                 }
 417                 deldelay_cnt += len;
 418                 read_pos = 0;
 419         }
 420
 421         bp = deldelay_buf + read_pos;
 422         if (*bp == '!') {
 423                 bp++;
 424                 *flags_p = DEL_NO_UID_WRITE;
 425         } else
 426                 *flags_p = 0;
 427
 428         if (sscanf(bp, "%x ", &mode) != 1) {
 429           invalid_data:
 430                 rprintf(FERROR, "ERROR: invalid data in delete-delay file.\n");
 431                 return -1;
 432         }
 433         past_space = strchr(bp, ' ') + 1;
 434         len = j - read_pos - (past_space - bp) + 1; /* count the '\0' */
 435         read_pos = j + 1;
 436
 437         if (len > MAXPATHLEN) {
 438                 rprintf(FERROR, "ERROR: filename too long in delete-delay file.\n");
 439                 return -1;
 440         }
 441
 442         /* The caller needs the name in a MAXPATHLEN buffer, so we copy it
 443          * instead of returning a pointer to our buffer. */
 444         memcpy(buf, past_space, len);
 445
 446         return mode;
 447 }
 448
 449 static void do_delayed_deletions(char *delbuf)
 450 {
 451         int mode, flags;
 452
 453         if (deldelay_fd >= 0) {
 454                 if (deldelay_cnt && !flush_delete_delay())
 455                         return;
 456                 lseek(deldelay_fd, 0, 0);
 457         }
 458         while ((mode = read_delay_line(delbuf, &flags)) >= 0)
 459                 delete_item(delbuf, mode, flags | DEL_RECURSE);
 460         if (deldelay_fd >= 0)
 461                 close(deldelay_fd);
 462 }
 463
 464 /* This function is used to implement per-directory deletion, and is used by
 465  * all the --delete-WHEN options.  Note that the fbuf pointer must point to a
 466  * MAXPATHLEN buffer with the name of the directory in it (the functions we
 467  * call will append names onto the end, but the old dir value will be restored
 468  * on exit). */
 469 static void delete_in_dir(char *fbuf, struct file_struct *file, dev_t *fs_dev)
 470 {
 471         static int already_warned = 0;
 472         struct file_list *dirlist;
 473         char delbuf[MAXPATHLEN];
 474         int dlen, i;
 475         int save_uid_ndx = uid_ndx;
 476
 477         if (!fbuf) {
 478                 change_local_filter_dir(NULL, 0, 0);
 479                 return;
 480         }
 481
 482         if (verbose > 2)
 483                 rprintf(FINFO, "delete_in_dir(%s)\n", fbuf);
 484
 485         if (allowed_lull)
 486                 maybe_send_keepalive();
 487
 488         if (io_error && !ignore_errors) {
 489                 if (already_warned)
 490                         return;
 491                 rprintf(FINFO,
 492                         "IO error encountered -- skipping file deletion\n");
 493                 already_warned = 1;
 494                 return;
 495         }
 496
 497         dlen = strlen(fbuf);
 498         change_local_filter_dir(fbuf, dlen, F_DEPTH(file));
 499
 500         if (one_file_system) {
 501                 if (file->flags & FLAG_TOP_DIR)
 502                         filesystem_dev = *fs_dev;
 503                 else if (filesystem_dev != *fs_dev)
 504                         return;
 505         }
 506
 507         if (!uid_ndx)
 508                 uid_ndx = ++file_extra_cnt;
 509
 510         dirlist = get_dirlist(fbuf, dlen, 0);
 511
 512         /* If an item in dirlist is not found in flist, delete it
 513          * from the filesystem. */
 514         for (i = dirlist->used; i--; ) {
 515                 struct file_struct *fp = dirlist->files[i];
 516                 if (!F_IS_ACTIVE(fp))
 517                         continue;
 518                 if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) {
 519                         if (verbose > 1)
 520                                 rprintf(FINFO, "cannot delete mount point: %s\n",
 521                                         f_name(fp, NULL));
 522                         continue;
 523                 }
 524                 if (flist_find(cur_flist, fp) < 0) {
 525                         int flags = DEL_RECURSE;
 526                         if (!(fp->mode & S_IWUSR) && !am_root && (uid_t)F_OWNER(fp) == our_uid)
 527                                 flags |= DEL_NO_UID_WRITE;
 528                         f_name(fp, delbuf);
 529                         if (delete_during == 2) {
 530                                 if (!remember_delete(fp, delbuf, flags))
 531                                         break;
 532                         } else
 533                                 delete_item(delbuf, fp->mode, flags);
 534                 }
 535         }
 536
 537         flist_free(dirlist);
 538
 539         if (!save_uid_ndx) {
 540                 --file_extra_cnt;
 541                 uid_ndx = 0;
 542         }
 543 }
 544
 545 /* This deletes any files on the receiving side that are not present on the
 546  * sending side.  This is used by --delete-before and --delete-after. */
 547 static void do_delete_pass(void)
 548 {
 549         char fbuf[MAXPATHLEN];
 550         STRUCT_STAT st;
 551         int j;
 552
 553         /* dry_run is incremented when the destination doesn't exist yet. */
 554         if (dry_run > 1 || list_only)
 555                 return;
 556
 557         for (j = 0; j < cur_flist->used; j++) {
 558                 struct file_struct *file = cur_flist->sorted[j];
 559
 560                 f_name(file, fbuf);
 561
 562                 if (!(file->flags & FLAG_CONTENT_DIR)) {
 563                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(file));
 564                         continue;
 565                 }
 566
 567                 if (verbose > 1 && file->flags & FLAG_TOP_DIR)
 568                         rprintf(FINFO, "deleting in %s\n", fbuf);
 569
 570                 if (link_stat(fbuf, &st, keep_dirlinks) < 0
 571                  || !S_ISDIR(st.st_mode))
 572                         continue;
 573
 574                 delete_in_dir(fbuf, file, &st.st_dev);
 575         }
 576         delete_in_dir(NULL, NULL, &dev_zero);
 577
 578         if (do_progress && !am_server)
 579                 rprintf(FINFO, "                    \r");
 580 }
 581
 582 int unchanged_attrs(const char *fname, struct file_struct *file, stat_x *sxp)
 583 {
 584 #if !defined HAVE_LUTIMES || !defined HAVE_UTIMES
 585         if (S_ISLNK(file->mode)) {
 586                 ;
 587         } else
 588 #endif
 589         if (preserve_times && cmp_time(sxp->st.st_mtime, file->modtime) != 0)
 590                 return 0;
 591
 592         if (preserve_perms) {
 593                 if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
 594                         return 0;
 595         } else if (preserve_executability
 596          && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
 597                 return 0;
 598
 599         if (am_root && uid_ndx && sxp->st.st_uid != (uid_t)F_OWNER(file))
 600                 return 0;
 601
 602         if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP) && sxp->st.st_gid != (gid_t)F_GROUP(file))
 603                 return 0;
 604
 605 #ifdef SUPPORT_ACLS
 606         if (preserve_acls && !S_ISLNK(file->mode)) {
 607                 if (!ACL_READY(*sxp))
 608                         get_acl(fname, sxp);
 609                 if (set_acl(NULL, file, sxp) == 0)
 610                         return 0;
 611         }
 612 #endif
 613 #ifdef SUPPORT_XATTRS
 614         if (preserve_xattrs) {
 615                 if (!XATTR_READY(*sxp))
 616                         get_xattr(fname, sxp);
 617                 if (xattr_diff(file, sxp, 0))
 618                         return 0;
 619         }
 620 #endif
 621
 622         return 1;
 623 }
 624
 625 void itemize(const char *fnamecmp, struct file_struct *file, int ndx, int statret,
 626              stat_x *sxp, int32 iflags, uchar fnamecmp_type,
 627              const char *xname)
 628 {
 629         if (statret >= 0) { /* A from-dest-dir statret can == 1! */
 630                 int keep_time = !preserve_times ? 0
 631                     : S_ISDIR(file->mode) ? preserve_times > 1 :
 632 #if defined HAVE_LUTIMES && defined HAVE_UTIMES
 633                     1;
 634 #else
 635                     !S_ISLNK(file->mode);
 636 #endif
 637
 638                 if (S_ISREG(file->mode) && F_LENGTH(file) != sxp->st.st_size)
 639                         iflags |= ITEM_REPORT_SIZE;
 640                 if (file->flags & FLAG_TIME_FAILED) { /* symlinks only */
 641                         if (iflags & ITEM_LOCAL_CHANGE)
 642                                 iflags |= symlink_timeset_failed_flags;
 643                 } else if (keep_time
 644                  ? cmp_time(file->modtime, sxp->st.st_mtime) != 0
 645                  : iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !(iflags & ITEM_MATCHED)
 646                   && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
 647                         iflags |= ITEM_REPORT_TIME;
 648 #if !defined HAVE_LCHMOD && !defined HAVE_SETATTRLIST
 649                 if (S_ISLNK(file->mode)) {
 650                         ;
 651                 } else
 652 #endif
 653                 if (preserve_perms) {
 654                         if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
 655                                 iflags |= ITEM_REPORT_PERMS;
 656                 } else if (preserve_executability
 657                  && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
 658                         iflags |= ITEM_REPORT_PERMS;
 659                 if (uid_ndx && am_root && (uid_t)F_OWNER(file) != sxp->st.st_uid)
 660                         iflags |= ITEM_REPORT_OWNER;
 661                 if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP)
 662                     && sxp->st.st_gid != (gid_t)F_GROUP(file))
 663                         iflags |= ITEM_REPORT_GROUP;
 664 #ifdef SUPPORT_ACLS
 665                 if (preserve_acls && !S_ISLNK(file->mode)) {
 666                         if (!ACL_READY(*sxp))
 667                                 get_acl(fnamecmp, sxp);
 668                         if (set_acl(NULL, file, sxp) == 0)
 669                                 iflags |= ITEM_REPORT_ACL;
 670                 }
 671 #endif
 672 #ifdef SUPPORT_XATTRS
 673                 if (preserve_xattrs) {
 674                         if (!XATTR_READY(*sxp))
 675                                 get_xattr(fnamecmp, sxp);
 676                         if (xattr_diff(file, sxp, 1))
 677                                 iflags |= ITEM_REPORT_XATTR;
 678                 }
 679 #endif
 680         } else {
 681 #ifdef SUPPORT_XATTRS
 682                 if (preserve_xattrs && xattr_diff(file, NULL, 1))
 683                         iflags |= ITEM_REPORT_XATTR;
 684 #endif
 685                 iflags |= ITEM_IS_NEW;
 686         }
 687
 688         iflags &= 0xffff;
 689         if ((iflags & (SIGNIFICANT_ITEM_FLAGS|ITEM_REPORT_XATTR) || verbose > 1
 690           || stdout_format_has_i > 1 || (xname && *xname)) && !read_batch) {
 691                 if (protocol_version >= 29) {
 692                         if (ndx >= 0)
 693                                 write_ndx(sock_f_out, ndx);
 694                         write_shortint(sock_f_out, iflags);
 695                         if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
 696                                 write_byte(sock_f_out, fnamecmp_type);
 697                         if (iflags & ITEM_XNAME_FOLLOWS)
 698                                 write_vstring(sock_f_out, xname, strlen(xname));
 699 #ifdef SUPPORT_XATTRS
 700                         if (preserve_xattrs && !dry_run
 701                          && iflags & (ITEM_REPORT_XATTR|ITEM_TRANSFER)) {
 702                                 send_xattr_request(NULL, file,
 703                                         iflags & ITEM_REPORT_XATTR ? sock_f_out : -1);
 704                         }
 705 #endif
 706                 } else if (ndx >= 0) {
 707                         enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
 708                         log_item(code, file, &stats, iflags, xname);
 709                 }
 710         }
 711 }
 712
 713
 714 /* Perform our quick-check heuristic for determining if a file is unchanged. */
 715 int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
 716 {
 717         if (st->st_size != F_LENGTH(file))
 718                 return 0;
 719
 720         /* if always checksum is set then we use the checksum instead
 721            of the file time to determine whether to sync */
 722         if (always_checksum > 0 && S_ISREG(st->st_mode)) {
 723                 char sum[MAX_DIGEST_LEN];
 724                 file_checksum(fn, sum, st->st_size);
 725                 return memcmp(sum, F_SUM(file), checksum_len) == 0;
 726         }
 727
 728         if (size_only > 0)
 729                 return 1;
 730
 731         if (ignore_times)
 732                 return 0;
 733
 734         return cmp_time(st->st_mtime, file->modtime) == 0;
 735 }
 736
 737
 738 /*
 739  * set (initialize) the size entries in the per-file sum_struct
 740  * calculating dynamic block and checksum sizes.
 741  *
 742  * This is only called from generate_and_send_sums() but is a separate
 743  * function to encapsulate the logic.
 744  *
 745  * The block size is a rounded square root of file length.
 746  *
 747  * The checksum size is determined according to:
 748  *     blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
 749  * provided by Donovan Baarda which gives a probability of rsync
 750  * algorithm corrupting data and falling back using the whole md4
 751  * checksums.
 752  *
 753  * This might be made one of several selectable heuristics.
 754  */
 755 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
 756 {
 757         int32 blength;
 758         int s2length;
 759         int64 l;
 760
 761         if (block_size)
 762                 blength = block_size;
 763         else if (len <= BLOCK_SIZE * BLOCK_SIZE)
 764                 blength = BLOCK_SIZE;
 765         else {
 766                 int32 max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE;
 767                 int32 c;
 768                 int cnt;
 769                 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
 770                 if (c < 0 || c >= max_blength)
 771                         blength = max_blength;
 772                 else {
 773                     blength = 0;
 774                     do {
 775                             blength |= c;
 776                             if (len < (int64)blength * blength)
 777                                     blength &= ~c;
 778                             c >>= 1;
 779                     } while (c >= 8);   /* round to multiple of 8 */
 780                     blength = MAX(blength, BLOCK_SIZE);
 781                 }
 782         }
 783
 784         if (protocol_version < 27) {
 785                 s2length = csum_length;
 786         } else if (csum_length == SUM_LENGTH) {
 787                 s2length = SUM_LENGTH;
 788         } else {
 789                 int32 c;
 790                 int b = BLOCKSUM_BIAS;
 791                 for (l = len; l >>= 1; b += 2) {}
 792                 for (c = blength; (c >>= 1) && b; b--) {}
 793                 /* add a bit, subtract rollsum, round up. */
 794                 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
 795                 s2length = MAX(s2length, csum_length);
 796                 s2length = MIN(s2length, SUM_LENGTH);
 797         }
 798
 799         sum->flength    = len;
 800         sum->blength    = blength;
 801         sum->s2length   = s2length;
 802         sum->remainder  = (int32)(len % blength);
 803         sum->count      = (int32)(l = (len / blength) + (sum->remainder != 0));
 804
 805         if ((int64)sum->count != l)
 806                 sum->count = -1;
 807
 808         if (sum->count && verbose > 2) {
 809                 rprintf(FINFO,
 810                         "count=%.0f rem=%ld blength=%ld s2length=%d flength=%.0f\n",
 811                         (double)sum->count, (long)sum->remainder, (long)sum->blength,
 812                         sum->s2length, (double)sum->flength);
 813         }
 814 }
 815
 816
 817 /*
 818  * Generate and send a stream of signatures/checksums that describe a buffer
 819  *
 820  * Generate approximately one checksum every block_len bytes.
 821  */
 822 static int generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
 823 {
 824         int32 i;
 825         struct map_struct *mapbuf;
 826         struct sum_struct sum;
 827         OFF_T offset = 0;
 828
 829         sum_sizes_sqroot(&sum, len);
 830         if (sum.count < 0)
 831                 return -1;
 832         write_sum_head(f_out, &sum);
 833
 834         if (append_mode > 0 && f_copy < 0)
 835                 return 0;
 836
 837         if (len > 0)
 838                 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
 839         else
 840                 mapbuf = NULL;
 841
 842         for (i = 0; i < sum.count; i++) {
 843                 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
 844                 char *map = map_ptr(mapbuf, offset, n1);
 845                 char sum2[SUM_LENGTH];
 846                 uint32 sum1;
 847
 848                 len -= n1;
 849                 offset += n1;
 850
 851                 if (f_copy >= 0) {
 852                         full_write(f_copy, map, n1);
 853                         if (append_mode > 0)
 854                                 continue;
 855                 }
 856
 857                 sum1 = get_checksum1(map, n1);
 858                 get_checksum2(map, n1, sum2);
 859
 860                 if (verbose > 3) {
 861                         rprintf(FINFO,
 862                                 "chunk[%.0f] offset=%.0f len=%ld sum1=%08lx\n",
 863                                 (double)i, (double)offset - n1, (long)n1,
 864                                 (unsigned long)sum1);
 865                 }
 866                 write_int(f_out, sum1);
 867                 write_buf(f_out, sum2, sum.s2length);
 868         }
 869
 870         if (mapbuf)
 871                 unmap_file(mapbuf);
 872
 873         return 0;
 874 }
 875
 876
 877 /* Try to find a filename in the same dir as "fname" with a similar name. */
 878 static int find_fuzzy(struct file_struct *file, struct file_list *dirlist)
 879 {
 880         int fname_len, fname_suf_len;
 881         const char *fname_suf, *fname = file->basename;
 882         uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
 883         int j, lowest_j = -1;
 884
 885         fname_len = strlen(fname);
 886         fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
 887
 888         for (j = 0; j < dirlist->used; j++) {
 889                 struct file_struct *fp = dirlist->files[j];
 890                 const char *suf, *name;
 891                 int len, suf_len;
 892                 uint32 dist;
 893
 894                 if (!S_ISREG(fp->mode) || !F_LENGTH(fp)
 895                  || fp->flags & FLAG_FILE_SENT)
 896                         continue;
 897
 898                 name = fp->basename;
 899
 900                 if (F_LENGTH(fp) == F_LENGTH(file)
 901                     && cmp_time(fp->modtime, file->modtime) == 0) {
 902                         if (verbose > 4) {
 903                                 rprintf(FINFO,
 904                                         "fuzzy size/modtime match for %s\n",
 905                                         name);
 906                         }
 907                         return j;
 908                 }
 909
 910                 len = strlen(name);
 911                 suf = find_filename_suffix(name, len, &suf_len);
 912
 913                 dist = fuzzy_distance(name, len, fname, fname_len);
 914                 /* Add some extra weight to how well the suffixes match. */
 915                 dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len)
 916                       * 10;
 917                 if (verbose > 4) {
 918                         rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
 919                                 name, (int)(dist>>16), (int)(dist&0xFFFF));
 920                 }
 921                 if (dist <= lowest_dist) {
 922                         lowest_dist = dist;
 923                         lowest_j = j;
 924                 }
 925         }
 926
 927         return lowest_j;
 928 }
 929
 930 /* Copy a file found in our --copy-dest handling. */
 931 static int copy_altdest_file(const char *src, const char *dest, struct file_struct *file)
 932 {
 933         char buf[MAXPATHLEN];
 934         const char *copy_to, *partialptr;
 935         int save_preserve_xattrs = preserve_xattrs;
 936         int ok, fd_w;
 937
 938         if (inplace) {
 939                 /* Let copy_file open the destination in place. */
 940                 fd_w = -1;
 941                 copy_to = dest;
 942         } else {
 943                 fd_w = open_tmpfile(buf, dest, file);
 944                 if (fd_w < 0)
 945                         return -1;
 946                 copy_to = buf;
 947         }
 948         cleanup_set(copy_to, NULL, NULL, -1, -1);
 949         if (copy_file(src, copy_to, fd_w, file->mode, 0) < 0) {
 950                 if (verbose) {
 951                         rsyserr(FINFO, errno, "copy_file %s => %s",
 952                                 full_fname(src), copy_to);
 953                 }
 954                 /* Try to clean up. */
 955                 unlink(copy_to);
 956                 cleanup_disable();
 957                 return -1;
 958         }
 959         partialptr = partial_dir ? partial_dir_fname(dest) : NULL;
 960         preserve_xattrs = 0; /* xattrs were copied with file */
 961         ok = finish_transfer(dest, copy_to, src, partialptr, file, 1, 0);
 962         preserve_xattrs = save_preserve_xattrs;
 963         cleanup_disable();
 964         return ok ? 0 : -1;
 965 }
 966
 967 /* This is only called for regular files.  We return -2 if we've finished
 968  * handling the file, -1 if no dest-linking occurred, or a non-negative
 969  * value if we found an alternate basis file. */
 970 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
 971                          char *cmpbuf, stat_x *sxp, int itemizing,
 972                          enum logcode code)
 973 {
 974         int best_match = -1;
 975         int match_level = 0;
 976         int j = 0;
 977
 978         do {
 979                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 980                 if (link_stat(cmpbuf, &sxp->st, 0) < 0 || !S_ISREG(sxp->st.st_mode))
 981                         continue;
 982                 switch (match_level) {
 983                 case 0:
 984                         best_match = j;
 985                         match_level = 1;
 986                         /* FALL THROUGH */
 987                 case 1:
 988                         if (!unchanged_file(cmpbuf, file, &sxp->st))
 989                                 continue;
 990                         best_match = j;
 991                         match_level = 2;
 992                         /* FALL THROUGH */
 993                 case 2:
 994                         if (!unchanged_attrs(cmpbuf, file, sxp))
 995                                 continue;
 996                         best_match = j;
 997                         match_level = 3;
 998                         break;
 999                 }
1000                 break;
1001         } while (basis_dir[++j] != NULL);
1002
1003         if (!match_level)
1004                 return -1;
1005
1006         if (j != best_match) {
1007                 j = best_match;
1008                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1009                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1010                         return -1;
1011         }
1012
1013         if (match_level == 3 && !copy_dest) {
1014 #ifdef SUPPORT_HARD_LINKS
1015                 if (link_dest) {
1016                         if (!hard_link_one(file, fname, cmpbuf, 1))
1017                                 goto try_a_copy;
1018                         if (preserve_hard_links && F_IS_HLINKED(file))
1019                                 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, j);
1020                         if (!maybe_ATTRS_REPORT && (verbose > 1 || stdout_format_has_i > 1)) {
1021                                 itemize(cmpbuf, file, ndx, 1, sxp,
1022                                         ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS,
1023                                         0, "");
1024                         }
1025                 } else
1026 #endif
1027                 if (itemizing)
1028                         itemize(cmpbuf, file, ndx, 0, sxp, 0, 0, NULL);
1029                 if (verbose > 1 && maybe_ATTRS_REPORT)
1030                         rprintf(FCLIENT, "%s is uptodate\n", fname);
1031                 return -2;
1032         }
1033
1034         if (match_level >= 2) {
1035 #ifdef SUPPORT_HARD_LINKS
1036           try_a_copy: /* Copy the file locally. */
1037 #endif
1038                 if (!dry_run && copy_altdest_file(cmpbuf, fname, file) < 0)
1039                         return -1;
1040                 if (itemizing)
1041                         itemize(cmpbuf, file, ndx, 0, sxp, ITEM_LOCAL_CHANGE, 0, NULL);
1042                 if (maybe_ATTRS_REPORT
1043                  && ((!itemizing && verbose && match_level == 2)
1044                   || (verbose > 1 && match_level == 3))) {
1045                         code = match_level == 3 ? FCLIENT : FINFO;
1046                         rprintf(code, "%s%s\n", fname,
1047                                 match_level == 3 ? " is uptodate" : "");
1048                 }
1049 #ifdef SUPPORT_HARD_LINKS
1050                 if (preserve_hard_links && F_IS_HLINKED(file))
1051                         finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, -1);
1052 #endif
1053                 return -2;
1054         }
1055
1056         return FNAMECMP_BASIS_DIR_LOW + j;
1057 }
1058
1059 /* This is only called for non-regular files.  We return -2 if we've finished
1060  * handling the file, or -1 if no dest-linking occurred, or a non-negative
1061  * value if we found an alternate basis file. */
1062 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
1063                          char *cmpbuf, stat_x *sxp, int itemizing,
1064                          enum logcode code)
1065 {
1066         char lnk[MAXPATHLEN];
1067         int best_match = -1;
1068         int match_level = 0;
1069         enum nonregtype type;
1070         uint32 *devp;
1071         int len, j = 0;
1072
1073 #ifndef SUPPORT_LINKS
1074         if (S_ISLNK(file->mode))
1075                 return -1;
1076 #endif
1077         if (S_ISDIR(file->mode)) {
1078                 type = TYPE_DIR;
1079         } else if (IS_SPECIAL(file->mode))
1080                 type = TYPE_SPECIAL;
1081         else if (IS_DEVICE(file->mode))
1082                 type = TYPE_DEVICE;
1083 #ifdef SUPPORT_LINKS
1084         else if (S_ISLNK(file->mode))
1085                 type = TYPE_SYMLINK;
1086 #endif
1087         else {
1088                 rprintf(FERROR,
1089                         "internal: try_dests_non() called with invalid mode (%o)\n",
1090                         (int)file->mode);
1091                 exit_cleanup(RERR_UNSUPPORTED);
1092         }
1093
1094         do {
1095                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1096                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1097                         continue;
1098                 switch (type) {
1099                 case TYPE_DIR:
1100                         if (!S_ISDIR(sxp->st.st_mode))
1101                                 continue;
1102                         break;
1103                 case TYPE_SPECIAL:
1104                         if (!IS_SPECIAL(sxp->st.st_mode))
1105                                 continue;
1106                         break;
1107                 case TYPE_DEVICE:
1108                         if (!IS_DEVICE(sxp->st.st_mode))
1109                                 continue;
1110                         break;
1111 #ifdef SUPPORT_LINKS
1112                 case TYPE_SYMLINK:
1113                         if (!S_ISLNK(sxp->st.st_mode))
1114                                 continue;
1115                         break;
1116 #endif
1117                 }
1118                 if (match_level < 1) {
1119                         match_level = 1;
1120                         best_match = j;
1121                 }
1122                 switch (type) {
1123                 case TYPE_DIR:
1124                         break;
1125                 case TYPE_SPECIAL:
1126                 case TYPE_DEVICE:
1127                         devp = F_RDEV_P(file);
1128                         if (sxp->st.st_rdev != MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)))
1129                                 continue;
1130                         break;
1131 #ifdef SUPPORT_LINKS
1132                 case TYPE_SYMLINK:
1133                         if ((len = readlink(cmpbuf, lnk, MAXPATHLEN-1)) <= 0)
1134                                 continue;
1135                         lnk[len] = '\0';
1136                         if (strcmp(lnk, F_SYMLINK(file)) != 0)
1137                                 continue;
1138                         break;
1139 #endif
1140                 }
1141                 if (match_level < 2) {
1142                         match_level = 2;
1143                         best_match = j;
1144                 }
1145                 if (unchanged_attrs(cmpbuf, file, sxp)) {
1146                         match_level = 3;
1147                         best_match = j;
1148                         break;
1149                 }
1150         } while (basis_dir[++j] != NULL);
1151
1152         if (!match_level)
1153                 return -1;
1154
1155         if (j != best_match) {
1156                 j = best_match;
1157                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1158                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1159                         return -1;
1160         }
1161
1162         if (match_level == 3) {
1163 #ifdef SUPPORT_HARD_LINKS
1164                 if (link_dest
1165 #ifndef CAN_HARDLINK_SYMLINK
1166                  && !S_ISLNK(file->mode)
1167 #endif
1168 #ifndef CAN_HARDLINK_SPECIAL
1169                  && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
1170 #endif
1171                  && !S_ISDIR(file->mode)) {
1172                         if (do_link(cmpbuf, fname) < 0) {
1173                                 rsyserr(FERROR_XFER, errno,
1174                                         "failed to hard-link %s with %s",
1175                                         cmpbuf, fname);
1176                                 return j;
1177                         }
1178                         if (preserve_hard_links && F_IS_HLINKED(file))
1179                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1180                 } else
1181 #endif
1182                         match_level = 2;
1183                 if (itemizing && stdout_format_has_i
1184                  && (verbose > 1 || stdout_format_has_i > 1)) {
1185                         int chg = compare_dest && type != TYPE_DIR ? 0
1186                             : ITEM_LOCAL_CHANGE + (match_level == 3 ? ITEM_XNAME_FOLLOWS : 0);
1187                         char *lp = match_level == 3 ? "" : NULL;
1188                         itemize(cmpbuf, file, ndx, 0, sxp, chg + ITEM_MATCHED, 0, lp);
1189                 }
1190                 if (verbose > 1 && maybe_ATTRS_REPORT) {
1191                         rprintf(FCLIENT, "%s%s is uptodate\n",
1192                                 fname, type == TYPE_DIR ? "/" : "");
1193                 }
1194                 return -2;
1195         }
1196
1197         return j;
1198 }
1199
1200 static void list_file_entry(struct file_struct *f)
1201 {
1202         char permbuf[PERMSTRING_SIZE];
1203         double len;
1204
1205         if (!F_IS_ACTIVE(f)) {
1206                 /* this can happen if duplicate names were removed */
1207                 return;
1208         }
1209
1210         permstring(permbuf, f->mode);
1211         len = F_LENGTH(f);
1212
1213         /* TODO: indicate '+' if the entry has an ACL. */
1214
1215 #ifdef SUPPORT_LINKS
1216         if (preserve_links && S_ISLNK(f->mode)) {
1217                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
1218                         permbuf, len, timestring(f->modtime),
1219                         f_name(f, NULL), F_SYMLINK(f));
1220         } else
1221 #endif
1222         {
1223                 rprintf(FINFO, "%s %11.0f %s %s\n",
1224                         permbuf, len, timestring(f->modtime),
1225                         f_name(f, NULL));
1226         }
1227 }
1228
1229 static int phase = 0;
1230 static int dflt_perms;
1231
1232 static int implied_dirs_are_missing;
1233 /* Helper for recv_generator's skip_dir and dry_missing_dir tests. */
1234 static BOOL is_below(struct file_struct *file, struct file_struct *subtree)
1235 {
1236         return F_DEPTH(file) > F_DEPTH(subtree)
1237                 && (!implied_dirs_are_missing || f_name_has_prefix(file, subtree));
1238 }
1239
1240 /* Acts on the indicated item in cur_flist whose name is fname.  If a dir,
1241  * make sure it exists, and has the right permissions/timestamp info.  For
1242  * all other non-regular files (symlinks, etc.) we create them here.  For
1243  * regular files that have changed, we try to find a basis file and then
1244  * start sending checksums.  The ndx is the file's unique index value.
1245  *
1246  * The fname parameter must point to a MAXPATHLEN buffer!  (e.g it gets
1247  * passed to delete_item(), which can use it during a recursive delete.)
1248  *
1249  * Note that f_out is set to -1 when doing final directory-permission and
1250  * modification-time repair. */
1251 static void recv_generator(char *fname, struct file_struct *file, int ndx,
1252                            int itemizing, enum logcode code, int f_out)
1253 {
1254         static const char *parent_dirname = "";
1255         /* Missing dir not created due to --dry-run; will still be scanned. */
1256         static struct file_struct *dry_missing_dir = NULL;
1257         /* Missing dir whose contents are skipped altogether due to
1258          * --ignore-non-existing, daemon exclude, or mkdir failure. */
1259         static struct file_struct *skip_dir = NULL;
1260         static struct file_list *fuzzy_dirlist = NULL;
1261         static int need_fuzzy_dirlist = 0;
1262         struct file_struct *fuzzy_file = NULL;
1263         int fd = -1, f_copy = -1;
1264         stat_x sx, real_sx;
1265         STRUCT_STAT partial_st;
1266         struct file_struct *back_file = NULL;
1267         int statret, real_ret, stat_errno;
1268         char *fnamecmp, *partialptr, *backupptr = NULL;
1269         char fnamecmpbuf[MAXPATHLEN];
1270         uchar fnamecmp_type;
1271         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1272         int is_dir = !S_ISDIR(file->mode) ? 0
1273                    : inc_recurse && ndx != cur_flist->ndx_start - 1 ? -1
1274                    : 1;
1275
1276         if (verbose > 2)
1277                 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
1278
1279         if (list_only) {
1280                 if (is_dir < 0
1281                  || (is_dir && !implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1282                         return;
1283                 list_file_entry(file);
1284                 return;
1285         }
1286
1287         if (skip_dir) {
1288                 if (is_below(file, skip_dir)) {
1289                         if (is_dir)
1290                                 file->flags |= FLAG_MISSING_DIR;
1291 #ifdef SUPPORT_HARD_LINKS
1292                         else if (F_IS_HLINKED(file))
1293                                 handle_skipped_hlink(file, itemizing, code, f_out);
1294 #endif
1295                         return;
1296                 }
1297                 skip_dir = NULL;
1298         }
1299
1300         if (daemon_filter_list.head && (*fname != '.' || fname[1])) {
1301                 if (check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
1302                         if (is_dir < 0)
1303                                 return;
1304 #ifdef SUPPORT_HARD_LINKS
1305                         if (F_IS_HLINKED(file))
1306                                 handle_skipped_hlink(file, itemizing, code, f_out);
1307 #endif
1308                         rprintf(FERROR_XFER,
1309                                 "skipping daemon-excluded %s \"%s\"\n",
1310                                 is_dir ? "directory" : "file", fname);
1311                         if (is_dir)
1312                                 goto skipping_dir_contents;
1313                         return;
1314                 }
1315         }
1316
1317 #ifdef SUPPORT_ACLS
1318         sx.acc_acl = sx.def_acl = NULL;
1319 #endif
1320 #ifdef SUPPORT_XATTRS
1321         sx.xattr = NULL;
1322 #endif
1323         if (dry_run > 1 || (dry_missing_dir && is_below(file, dry_missing_dir))) {
1324           parent_is_dry_missing:
1325                 if (fuzzy_dirlist) {
1326                         flist_free(fuzzy_dirlist);
1327                         fuzzy_dirlist = NULL;
1328                 }
1329                 parent_dirname = "";
1330                 statret = -1;
1331                 stat_errno = ENOENT;
1332         } else {
1333                 const char *dn = file->dirname ? file->dirname : ".";
1334                 dry_missing_dir = NULL;
1335                 if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
1336                         if (relative_paths && !implied_dirs
1337                          && do_stat(dn, &sx.st) < 0) {
1338                                 if (dry_run)
1339                                         goto parent_is_dry_missing;
1340                                 if (create_directory_path(fname) < 0) {
1341                                         rsyserr(FERROR_XFER, errno,
1342                                                 "recv_generator: mkdir %s failed",
1343                                                 full_fname(dn));
1344                                 }
1345                         }
1346                         if (fuzzy_dirlist) {
1347                                 flist_free(fuzzy_dirlist);
1348                                 fuzzy_dirlist = NULL;
1349                         }
1350                         if (fuzzy_basis)
1351                                 need_fuzzy_dirlist = 1;
1352 #ifdef SUPPORT_ACLS
1353                         if (!preserve_perms)
1354                                 dflt_perms = default_perms_for_dir(dn);
1355 #endif
1356                 }
1357                 parent_dirname = dn;
1358
1359                 if (need_fuzzy_dirlist && S_ISREG(file->mode)) {
1360                         strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf);
1361                         fuzzy_dirlist = get_dirlist(fnamecmpbuf, -1, 1);
1362                         need_fuzzy_dirlist = 0;
1363                 }
1364
1365                 statret = link_stat(fname, &sx.st, keep_dirlinks && is_dir);
1366                 stat_errno = errno;
1367         }
1368
1369         if (ignore_non_existing > 0 && statret == -1 && stat_errno == ENOENT) {
1370                 if (is_dir) {
1371                         if (is_dir < 0)
1372                                 return;
1373                         skip_dir = file;
1374                         file->flags |= FLAG_MISSING_DIR;
1375                 }
1376 #ifdef SUPPORT_HARD_LINKS
1377                 else if (F_IS_HLINKED(file))
1378                         handle_skipped_hlink(file, itemizing, code, f_out);
1379 #endif
1380                 if (verbose > 1) {
1381                         rprintf(FINFO, "not creating new %s \"%s\"\n",
1382                                 is_dir ? "directory" : "file", fname);
1383                 }
1384                 return;
1385         }
1386
1387         if (statret == 0 && !(sx.st.st_mode & S_IWUSR)
1388          && !am_root && sx.st.st_uid == our_uid)
1389                 del_opts |= DEL_NO_UID_WRITE;
1390
1391         if (ignore_existing > 0 && statret == 0
1392          && (!is_dir || !S_ISDIR(sx.st.st_mode))) {
1393                 if (verbose > 1 && is_dir >= 0)
1394                         rprintf(FINFO, "%s exists\n", fname);
1395 #ifdef SUPPORT_HARD_LINKS
1396                 if (F_IS_HLINKED(file))
1397                         handle_skipped_hlink(file, itemizing, code, f_out);
1398 #endif
1399                 goto cleanup;
1400         }
1401
1402         if (is_dir) {
1403                 if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
1404                         goto cleanup;
1405                 if (is_dir < 0) {
1406                         /* In inc_recurse mode we want to make sure any missing
1407                          * directories get created while we're still processing
1408                          * the parent dir (which allows us to touch the parent
1409                          * dir's mtime right away).  We will handle the dir in
1410                          * full later (right before we handle its contents). */
1411                         if (statret == 0
1412                          && (S_ISDIR(sx.st.st_mode)
1413                           || delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0))
1414                                 goto cleanup; /* Any errors get reported later. */
1415                         if (do_mkdir(fname, file->mode & 0700) == 0)
1416                                 file->flags |= FLAG_DIR_CREATED;
1417                         goto cleanup;
1418                 }
1419                 /* The file to be received is a directory, so we need
1420                  * to prepare appropriately.  If there is already a
1421                  * file of that name and it is *not* a directory, then
1422                  * we need to delete it.  If it doesn't exist, then
1423                  * (perhaps recursively) create it. */
1424                 if (statret == 0 && !S_ISDIR(sx.st.st_mode)) {
1425                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0)
1426                                 goto skipping_dir_contents;
1427                         statret = -1;
1428                 }
1429                 if (dry_run && statret != 0) {
1430                         if (!dry_missing_dir)
1431                                 dry_missing_dir = file;
1432                         file->flags |= FLAG_MISSING_DIR;
1433                 }
1434                 real_ret = statret;
1435                 real_sx = sx;
1436                 if (file->flags & FLAG_DIR_CREATED)
1437                         statret = -1;
1438                 if (!preserve_perms) { /* See comment in non-dir code below. */
1439                         file->mode = dest_mode(file->mode, sx.st.st_mode,
1440                                                dflt_perms, statret == 0);
1441                 }
1442                 if (statret != 0 && basis_dir[0] != NULL) {
1443                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1444                                               itemizing, code);
1445                         if (j == -2) {
1446                                 itemizing = 0;
1447                                 code = FNONE;
1448                                 statret = 1;
1449                         } else if (j >= 0)
1450                                 statret = 1;
1451                 }
1452                 if (itemizing && f_out != -1) {
1453                         itemize(fname, file, ndx, statret, &sx,
1454                                 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
1455                 }
1456                 if (real_ret != 0 && do_mkdir(fname,file->mode) < 0 && errno != EEXIST) {
1457                         if (!relative_paths || errno != ENOENT
1458                             || create_directory_path(fname) < 0
1459                             || (do_mkdir(fname, file->mode) < 0 && errno != EEXIST)) {
1460                                 rsyserr(FERROR_XFER, errno,
1461                                         "recv_generator: mkdir %s failed",
1462                                         full_fname(fname));
1463                           skipping_dir_contents:
1464                                 rprintf(FERROR,
1465                                     "*** Skipping any contents from this failed directory ***\n");
1466                                 skip_dir = file;
1467                                 file->flags |= FLAG_MISSING_DIR;
1468                                 goto cleanup;
1469                         }
1470                 }
1471 #ifdef SUPPORT_XATTRS
1472                 if (preserve_xattrs && statret == 1)
1473                         copy_xattrs(fnamecmpbuf, fname);
1474 #endif
1475                 if (set_file_attrs(fname, file, real_ret ? NULL : &real_sx, NULL, 0)
1476                     && verbose && code != FNONE && f_out != -1)
1477                         rprintf(code, "%s/\n", fname);
1478
1479                 /* We need to ensure that the dirs in the transfer have writable
1480                  * permissions during the time we are putting files within them.
1481                  * This is then fixed after the transfer is done. */
1482 #ifdef HAVE_CHMOD
1483                 if (!am_root && !(file->mode & S_IWUSR) && dir_tweaking) {
1484                         mode_t mode = file->mode | S_IWUSR;
1485                         if (do_chmod(fname, mode) < 0) {
1486                                 rsyserr(FERROR_XFER, errno,
1487                                         "failed to modify permissions on %s",
1488                                         full_fname(fname));
1489                         }
1490                         need_retouch_dir_perms = 1;
1491                 }
1492 #endif
1493
1494                 if (real_ret != 0 && one_file_system)
1495                         real_sx.st.st_dev = filesystem_dev;
1496                 if (inc_recurse) {
1497                         if (one_file_system) {
1498                                 uint32 *devp = F_DIR_DEV_P(file);
1499                                 DEV_MAJOR(devp) = major(real_sx.st.st_dev);
1500                                 DEV_MINOR(devp) = minor(real_sx.st.st_dev);
1501                         }
1502                 }
1503                 else if (delete_during && f_out != -1 && !phase
1504                     && !(file->flags & FLAG_MISSING_DIR)) {
1505                         if (file->flags & FLAG_CONTENT_DIR)
1506                                 delete_in_dir(fname, file, &real_sx.st.st_dev);
1507                         else
1508                                 change_local_filter_dir(fname, strlen(fname), F_DEPTH(file));
1509                 }
1510                 goto cleanup;
1511         }
1512
1513         /* If we're not preserving permissions, change the file-list's
1514          * mode based on the local permissions and some heuristics. */
1515         if (!preserve_perms) {
1516                 int exists = statret == 0 && !S_ISDIR(sx.st.st_mode);
1517                 file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms,
1518                                        exists);
1519         }
1520
1521 #ifdef SUPPORT_HARD_LINKS
1522         if (preserve_hard_links && F_HLINK_NOT_FIRST(file)
1523          && hard_link_check(file, ndx, fname, statret, &sx, itemizing, code))
1524                 goto cleanup;
1525 #endif
1526
1527         if (preserve_links && S_ISLNK(file->mode)) {
1528 #ifdef SUPPORT_LINKS
1529                 const char *sl = F_SYMLINK(file);
1530                 if (safe_symlinks && unsafe_symlink(sl, fname)) {
1531                         if (verbose) {
1532                                 if (solo_file)
1533                                         fname = f_name(file, NULL);
1534                                 rprintf(FINFO,
1535                                         "ignoring unsafe symlink %s -> \"%s\"\n",
1536                                         full_fname(fname), sl);
1537                         }
1538                         return;
1539                 }
1540                 if (statret == 0) {
1541                         char lnk[MAXPATHLEN];
1542                         int len;
1543
1544                         if (!S_ISLNK(sx.st.st_mode))
1545                                 statret = -1;
1546                         else if ((len = readlink(fname, lnk, MAXPATHLEN-1)) > 0
1547                               && strncmp(lnk, sl, len) == 0 && sl[len] == '\0') {
1548                                 /* The link is pointing to the right place. */
1549                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1550                                 if (itemizing)
1551                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1552 #if defined SUPPORT_HARD_LINKS && defined CAN_HARDLINK_SYMLINK
1553                                 if (preserve_hard_links && F_IS_HLINKED(file))
1554                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1555 #endif
1556                                 if (remove_source_files == 1)
1557                                         goto return_with_success;
1558                                 goto cleanup;
1559                         }
1560                         /* Not the right symlink (or not a symlink), so
1561                          * delete it. */
1562                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_SYMLINK) != 0)
1563                                 goto cleanup;
1564                 } else if (basis_dir[0] != NULL) {
1565                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1566                                               itemizing, code);
1567                         if (j == -2) {
1568 #ifndef CAN_HARDLINK_SYMLINK
1569                                 if (link_dest) {
1570                                         /* Resort to --copy-dest behavior. */
1571                                 } else
1572 #endif
1573                                 if (!copy_dest)
1574                                         goto cleanup;
1575                                 itemizing = 0;
1576                                 code = FNONE;
1577                         } else if (j >= 0)
1578                                 statret = 1;
1579                 }
1580 #ifdef SUPPORT_HARD_LINKS
1581                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1582                         cur_flist->in_progress++;
1583                         goto cleanup;
1584                 }
1585 #endif
1586                 if (do_symlink(sl, fname) != 0) {
1587                         rsyserr(FERROR_XFER, errno, "symlink %s -> \"%s\" failed",
1588                                 full_fname(fname), sl);
1589                 } else {
1590                         set_file_attrs(fname, file, NULL, NULL, 0);
1591                         if (itemizing) {
1592                                 itemize(fname, file, ndx, statret, &sx,
1593                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1594                         }
1595                         if (code != FNONE && verbose)
1596                                 rprintf(code, "%s -> %s\n", fname, sl);
1597 #ifdef SUPPORT_HARD_LINKS
1598                         if (preserve_hard_links && F_IS_HLINKED(file))
1599                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1600 #endif
1601                         /* This does not check remove_source_files == 1
1602                          * because this is one of the items that the old
1603                          * --remove-sent-files option would remove. */
1604                         if (remove_source_files)
1605                                 goto return_with_success;
1606                 }
1607 #endif
1608                 goto cleanup;
1609         }
1610
1611         if ((am_root && preserve_devices && IS_DEVICE(file->mode))
1612          || (preserve_specials && IS_SPECIAL(file->mode))) {
1613                 uint32 *devp = F_RDEV_P(file);
1614                 dev_t rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
1615                 if (statret == 0) {
1616                         int del_for_flag;
1617                         if (IS_DEVICE(file->mode)) {
1618                                 if (!IS_DEVICE(sx.st.st_mode))
1619                                         statret = -1;
1620                                 del_for_flag = DEL_FOR_DEVICE;
1621                         } else {
1622                                 if (!IS_SPECIAL(sx.st.st_mode))
1623                                         statret = -1;
1624                                 del_for_flag = DEL_FOR_SPECIAL;
1625                         }
1626                         if (statret == 0
1627                          && BITS_EQUAL(sx.st.st_mode, file->mode, _S_IFMT)
1628                          && sx.st.st_rdev == rdev) {
1629                                 /* The device or special file is identical. */
1630                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1631                                 if (itemizing)
1632                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1633 #ifdef SUPPORT_HARD_LINKS
1634                                 if (preserve_hard_links && F_IS_HLINKED(file))
1635                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1636 #endif
1637                                 if (remove_source_files == 1)
1638                                         goto return_with_success;
1639                                 goto cleanup;
1640                         }
1641                         if (delete_item(fname, sx.st.st_mode, del_opts | del_for_flag) != 0)
1642                                 goto cleanup;
1643                 } else if (basis_dir[0] != NULL) {
1644                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1645                                               itemizing, code);
1646                         if (j == -2) {
1647 #ifndef CAN_HARDLINK_SPECIAL
1648                                 if (link_dest) {
1649                                         /* Resort to --copy-dest behavior. */
1650                                 } else
1651 #endif
1652                                 if (!copy_dest)
1653                                         goto cleanup;
1654                                 itemizing = 0;
1655                                 code = FNONE;
1656                         } else if (j >= 0)
1657                                 statret = 1;
1658                 }
1659 #ifdef SUPPORT_HARD_LINKS
1660                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1661                         cur_flist->in_progress++;
1662                         goto cleanup;
1663                 }
1664 #endif
1665                 if (verbose > 2) {
1666                         rprintf(FINFO, "mknod(%s, 0%o, [%ld,%ld])\n",
1667                                 fname, (int)file->mode,
1668                                 (long)major(rdev), (long)minor(rdev));
1669                 }
1670                 if (do_mknod(fname, file->mode, rdev) < 0) {
1671                         rsyserr(FERROR_XFER, errno, "mknod %s failed",
1672                                 full_fname(fname));
1673                 } else {
1674                         set_file_attrs(fname, file, NULL, NULL, 0);
1675                         if (itemizing) {
1676                                 itemize(fname, file, ndx, statret, &sx,
1677                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1678                         }
1679                         if (code != FNONE && verbose)
1680                                 rprintf(code, "%s\n", fname);
1681 #ifdef SUPPORT_HARD_LINKS
1682                         if (preserve_hard_links && F_IS_HLINKED(file))
1683                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1684 #endif
1685                         if (remove_source_files == 1)
1686                                 goto return_with_success;
1687                 }
1688                 goto cleanup;
1689         }
1690
1691         if (!S_ISREG(file->mode)) {
1692                 if (solo_file)
1693                         fname = f_name(file, NULL);
1694                 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1695                 goto cleanup;
1696         }
1697
1698         if (max_size > 0 && F_LENGTH(file) > max_size) {
1699                 if (verbose > 1) {
1700                         if (solo_file)
1701                                 fname = f_name(file, NULL);
1702                         rprintf(FINFO, "%s is over max-size\n", fname);
1703                 }
1704                 goto cleanup;
1705         }
1706         if (min_size > 0 && F_LENGTH(file) < min_size) {
1707                 if (verbose > 1) {
1708                         if (solo_file)
1709                                 fname = f_name(file, NULL);
1710                         rprintf(FINFO, "%s is under min-size\n", fname);
1711                 }
1712                 goto cleanup;
1713         }
1714
1715         if (update_only > 0 && statret == 0
1716             && cmp_time(sx.st.st_mtime, file->modtime) > 0) {
1717                 if (verbose > 1)
1718                         rprintf(FINFO, "%s is newer\n", fname);
1719 #ifdef SUPPORT_HARD_LINKS
1720                 if (F_IS_HLINKED(file))
1721                         handle_skipped_hlink(file, itemizing, code, f_out);
1722 #endif
1723                 goto cleanup;
1724         }
1725
1726         fnamecmp = fname;
1727         fnamecmp_type = FNAMECMP_FNAME;
1728
1729         if (statret == 0 && !S_ISREG(sx.st.st_mode)) {
1730                 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_FILE) != 0)
1731                         goto cleanup;
1732                 statret = -1;
1733                 stat_errno = ENOENT;
1734         }
1735
1736         if (statret != 0 && basis_dir[0] != NULL) {
1737                 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &sx,
1738                                       itemizing, code);
1739                 if (j == -2) {
1740                         if (remove_source_files == 1)
1741                                 goto return_with_success;
1742                         goto cleanup;
1743                 }
1744                 if (j >= 0) {
1745                         fnamecmp = fnamecmpbuf;
1746                         fnamecmp_type = j;
1747                         statret = 0;
1748                 }
1749         }
1750
1751         real_ret = statret;
1752         real_sx = sx;
1753
1754         if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1755             && link_stat(partialptr, &partial_st, 0) == 0
1756             && S_ISREG(partial_st.st_mode)) {
1757                 if (statret != 0)
1758                         goto prepare_to_open;
1759         } else
1760                 partialptr = NULL;
1761
1762         if (statret != 0 && fuzzy_dirlist) {
1763                 int j = find_fuzzy(file, fuzzy_dirlist);
1764                 if (j >= 0) {
1765                         fuzzy_file = fuzzy_dirlist->files[j];
1766                         f_name(fuzzy_file, fnamecmpbuf);
1767                         if (verbose > 2) {
1768                                 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1769                                         fname, fnamecmpbuf);
1770                         }
1771                         sx.st.st_size = F_LENGTH(fuzzy_file);
1772                         statret = 0;
1773                         fnamecmp = fnamecmpbuf;
1774                         fnamecmp_type = FNAMECMP_FUZZY;
1775                 }
1776         }
1777
1778         if (statret != 0) {
1779 #ifdef SUPPORT_HARD_LINKS
1780                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1781                         cur_flist->in_progress++;
1782                         goto cleanup;
1783                 }
1784 #endif
1785                 if (stat_errno == ENOENT)
1786                         goto notify_others;
1787                 rsyserr(FERROR_XFER, stat_errno, "recv_generator: failed to stat %s",
1788                         full_fname(fname));
1789                 goto cleanup;
1790         }
1791
1792         if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1793                 ;
1794         else if (fnamecmp_type == FNAMECMP_FUZZY)
1795                 ;
1796         else if (unchanged_file(fnamecmp, file, &sx.st)) {
1797                 if (partialptr) {
1798                         do_unlink(partialptr);
1799                         handle_partial_dir(partialptr, PDIR_DELETE);
1800                 }
1801                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1802                 if (itemizing)
1803                         itemize(fnamecmp, file, ndx, statret, &sx, 0, 0, NULL);
1804 #ifdef SUPPORT_HARD_LINKS
1805                 if (preserve_hard_links && F_IS_HLINKED(file))
1806                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1807 #endif
1808                 if (remove_source_files != 1)
1809                         goto cleanup;
1810           return_with_success:
1811                 if (!dry_run)
1812                         send_msg_int(MSG_SUCCESS, ndx);
1813                 goto cleanup;
1814         }
1815
1816         if (append_mode > 0 && sx.st.st_size >= F_LENGTH(file)) {
1817 #ifdef SUPPORT_HARD_LINKS
1818                 if (F_IS_HLINKED(file))
1819                         handle_skipped_hlink(file, itemizing, code, f_out);
1820 #endif
1821                 goto cleanup;
1822         }
1823
1824   prepare_to_open:
1825         if (partialptr) {
1826                 sx.st = partial_st;
1827                 fnamecmp = partialptr;
1828                 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1829                 statret = 0;
1830         }
1831
1832         if (!do_xfers)
1833                 goto notify_others;
1834
1835         if (read_batch || whole_file) {
1836                 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1837                         if (!(backupptr = get_backup_name(fname)))
1838                                 goto cleanup;
1839                         if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
1840                                 goto pretend_missing;
1841                         if (copy_file(fname, backupptr, -1, back_file->mode, 1) < 0) {
1842                                 unmake_file(back_file);
1843                                 back_file = NULL;
1844                                 goto cleanup;
1845                         }
1846                 }
1847                 goto notify_others;
1848         }
1849
1850         if (fuzzy_dirlist) {
1851                 int j = flist_find(fuzzy_dirlist, file);
1852                 if (j >= 0) /* don't use changing file as future fuzzy basis */
1853                         fuzzy_dirlist->files[j]->flags |= FLAG_FILE_SENT;
1854         }
1855
1856         /* open the file */
1857         if ((fd = do_open(fnamecmp, O_RDONLY, 0)) < 0) {
1858                 rsyserr(FERROR, errno, "failed to open %s, continuing",
1859                         full_fname(fnamecmp));
1860           pretend_missing:
1861                 /* pretend the file didn't exist */
1862 #ifdef SUPPORT_HARD_LINKS
1863                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1864                         cur_flist->in_progress++;
1865                         goto cleanup;
1866                 }
1867 #endif
1868                 statret = real_ret = -1;
1869                 goto notify_others;
1870         }
1871
1872         if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1873                 if (!(backupptr = get_backup_name(fname))) {
1874                         close(fd);
1875                         goto cleanup;
1876                 }
1877                 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1878                         close(fd);
1879                         goto pretend_missing;
1880                 }
1881                 if (robust_unlink(backupptr) && errno != ENOENT) {
1882                         rsyserr(FERROR_XFER, errno, "unlink %s",
1883                                 full_fname(backupptr));
1884                         unmake_file(back_file);
1885                         back_file = NULL;
1886                         close(fd);
1887                         goto cleanup;
1888                 }
1889                 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1890                         int save_errno = errno ? errno : EINVAL; /* 0 paranoia */
1891                         if (errno == ENOENT && make_bak_dir(backupptr) == 0) {
1892                                 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0)
1893                                         save_errno = errno ? errno : save_errno;
1894                                 else
1895                                         save_errno = 0;
1896                         }
1897                         if (save_errno) {
1898                                 rsyserr(FERROR_XFER, save_errno, "open %s", full_fname(backupptr));
1899                                 unmake_file(back_file);
1900                                 back_file = NULL;
1901                                 close(fd);
1902                                 goto cleanup;
1903                         }
1904                 }
1905                 fnamecmp_type = FNAMECMP_BACKUP;
1906         }
1907
1908         if (verbose > 3) {
1909                 rprintf(FINFO, "gen mapped %s of size %.0f\n",
1910                         fnamecmp, (double)sx.st.st_size);
1911         }
1912
1913         if (verbose > 2)
1914                 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1915
1916   notify_others:
1917         if (remove_source_files && !delay_updates && !phase && !dry_run)
1918                 increment_active_files(ndx, itemizing, code);
1919         if (inc_recurse && !dry_run)
1920                 cur_flist->in_progress++;
1921 #ifdef SUPPORT_HARD_LINKS
1922         if (preserve_hard_links && F_IS_HLINKED(file))
1923                 file->flags |= FLAG_FILE_SENT;
1924 #endif
1925         write_ndx(f_out, ndx);
1926         if (itemizing) {
1927                 int iflags = ITEM_TRANSFER;
1928                 if (always_checksum > 0)
1929                         iflags |= ITEM_REPORT_CHANGE;
1930                 if (fnamecmp_type != FNAMECMP_FNAME)
1931                         iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1932                 if (fnamecmp_type == FNAMECMP_FUZZY)
1933                         iflags |= ITEM_XNAME_FOLLOWS;
1934                 itemize(fnamecmp, file, -1, real_ret, &real_sx, iflags, fnamecmp_type,
1935                         fuzzy_file ? fuzzy_file->basename : NULL);
1936 #ifdef SUPPORT_ACLS
1937                 if (preserve_acls)
1938                         free_acl(&real_sx);
1939 #endif
1940 #ifdef SUPPORT_XATTRS
1941                 if (preserve_xattrs)
1942                         free_xattr(&real_sx);
1943 #endif
1944         }
1945
1946         if (!do_xfers) {
1947 #ifdef SUPPORT_HARD_LINKS
1948                 if (preserve_hard_links && F_IS_HLINKED(file))
1949                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1950 #endif
1951                 goto cleanup;
1952         }
1953         if (read_batch)
1954                 goto cleanup;
1955
1956         if (statret != 0 || whole_file || sx.st.st_size <= 0)
1957                 write_sum_head(f_out, NULL);
1958         else {
1959                 if (generate_and_send_sums(fd, sx.st.st_size, f_out, f_copy) < 0) {
1960                         rprintf(FWARNING,
1961                             "WARNING: file is too large for checksum sending: %s\n",
1962                             fnamecmp);
1963                         write_sum_head(f_out, NULL);
1964                 }
1965                 close(fd);
1966         }
1967
1968   cleanup:
1969         if (back_file) {
1970                 int save_preserve_xattrs = preserve_xattrs;
1971                 if (f_copy >= 0)
1972                         close(f_copy);
1973 #ifdef SUPPORT_XATTRS
1974                 if (preserve_xattrs) {
1975                         copy_xattrs(fname, backupptr);
1976                         preserve_xattrs = 0;
1977                 }
1978 #endif
1979                 set_file_attrs(backupptr, back_file, NULL, NULL, 0);
1980                 preserve_xattrs = save_preserve_xattrs;
1981                 if (verbose > 1) {
1982                         rprintf(FINFO, "backed up %s to %s\n",
1983                                 fname, backupptr);
1984                 }
1985                 unmake_file(back_file);
1986         }
1987
1988 #ifdef SUPPORT_ACLS
1989         if (preserve_acls)
1990                 free_acl(&sx);
1991 #endif
1992 #ifdef SUPPORT_XATTRS
1993         if (preserve_xattrs)
1994                 free_xattr(&sx);
1995 #endif
1996         return;
1997 }
1998
1999 #ifdef SUPPORT_HARD_LINKS
2000 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
2001                                  enum logcode code, int f_out)
2002 {
2003         char fbuf[MAXPATHLEN];
2004         int new_last_ndx;
2005         struct file_list *save_flist = cur_flist;
2006
2007         /* If we skip the last item in a chain of links and there was a
2008          * prior non-skipped hard-link waiting to finish, finish it now. */
2009         if ((new_last_ndx = skip_hard_link(file, &cur_flist)) < 0)
2010                 return;
2011
2012         file = cur_flist->files[new_last_ndx - cur_flist->ndx_start];
2013         cur_flist->in_progress--; /* undo prior increment */
2014         f_name(file, fbuf);
2015         recv_generator(fbuf, file, new_last_ndx, itemizing, code, f_out);
2016
2017         cur_flist = save_flist;
2018 }
2019 #endif
2020
2021 static void touch_up_dirs(struct file_list *flist, int ndx)
2022 {
2023         static int counter = 0;
2024         struct file_struct *file;
2025         char *fname;
2026         int i, start, end;
2027
2028         if (ndx < 0) {
2029                 start = 0;
2030                 end = flist->used - 1;
2031         } else
2032                 start = end = ndx;
2033
2034         /* Fix any directory permissions that were modified during the
2035          * transfer and/or re-set any tweaked modified-time values. */
2036         for (i = start; i <= end; i++, counter++) {
2037                 file = flist->files[i];
2038                 if (!S_ISDIR(file->mode)
2039                  || (!implied_dirs && file->flags & FLAG_IMPLIED_DIR))
2040                         continue;
2041                 if (verbose > 3) {
2042                         fname = f_name(file, NULL);
2043                         rprintf(FINFO, "touch_up_dirs: %s (%d)\n",
2044                                 NS(fname), i);
2045                 }
2046                 if (!F_IS_ACTIVE(file) || file->flags & FLAG_MISSING_DIR
2047                  || (!need_retouch_dir_times && file->mode & S_IWUSR))
2048                         continue;
2049                 fname = f_name(file, NULL);
2050                 if (!(file->mode & S_IWUSR))
2051                         do_chmod(fname, file->mode);
2052                 if (need_retouch_dir_times) {
2053                         STRUCT_STAT st;
2054                         if (link_stat(fname, &st, 0) == 0
2055                          && cmp_time(st.st_mtime, file->modtime) != 0)
2056                                 set_modtime(fname, file->modtime, file->mode);
2057                 }
2058                 if (allowed_lull && !(counter % lull_mod))
2059                         maybe_send_keepalive();
2060                 else if (!(counter & 0xFF))
2061                         maybe_flush_socket(0);
2062         }
2063 }
2064
2065 void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
2066 {
2067         struct file_struct *file;
2068         struct file_list *flist;
2069         char fbuf[MAXPATHLEN];
2070         int ndx;
2071
2072         while (1) {
2073 #ifdef SUPPORT_HARD_LINKS
2074                 if (preserve_hard_links && (ndx = get_hlink_num()) != -1) {
2075                         flist = flist_for_ndx(ndx);
2076                         assert(flist != NULL);
2077                         file = flist->files[ndx - flist->ndx_start];
2078                         assert(file->flags & FLAG_HLINKED);
2079                         finish_hard_link(file, f_name(file, fbuf), ndx, NULL, itemizing, code, -1);
2080                         flist->in_progress--;
2081                         continue;
2082                 }
2083 #endif
2084
2085                 if (check_redo && (ndx = get_redo_num()) != -1) {
2086                         csum_length = SUM_LENGTH;
2087                         max_size = -max_size;
2088                         min_size = -min_size;
2089                         ignore_existing = -ignore_existing;
2090                         ignore_non_existing = -ignore_non_existing;
2091                         update_only = -update_only;
2092                         always_checksum = -always_checksum;
2093                         size_only = -size_only;
2094                         append_mode = -append_mode;
2095                         make_backups = -make_backups; /* avoid dup backup w/inplace */
2096                         ignore_times++;
2097
2098                         flist = cur_flist;
2099                         cur_flist = flist_for_ndx(ndx);
2100
2101                         file = cur_flist->files[ndx - cur_flist->ndx_start];
2102                         if (solo_file)
2103                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2104                         else
2105                                 f_name(file, fbuf);
2106                         recv_generator(fbuf, file, ndx, itemizing, code, sock_f_out);
2107                         cur_flist->to_redo--;
2108
2109                         cur_flist = flist;
2110
2111                         csum_length = SHORT_SUM_LENGTH;
2112                         max_size = -max_size;
2113                         min_size = -min_size;
2114                         ignore_existing = -ignore_existing;
2115                         ignore_non_existing = -ignore_non_existing;
2116                         update_only = -update_only;
2117                         always_checksum = -always_checksum;
2118                         size_only = -size_only;
2119                         append_mode = -append_mode;
2120                         make_backups = -make_backups;
2121                         ignore_times--;
2122                         continue;
2123                 }
2124
2125                 if (cur_flist == first_flist)
2126                         break;
2127
2128                 /* We only get here if inc_recurse is enabled. */
2129                 if (first_flist->in_progress || first_flist->to_redo)
2130                         break;
2131
2132                 if (!read_batch) {
2133                         write_ndx(sock_f_out, NDX_DONE);
2134                         maybe_flush_socket(1);
2135                 }
2136
2137                 if (delete_during == 2 || !dir_tweaking) {
2138                         /* Skip directory touch-up. */
2139                 } else if (first_flist->parent_ndx >= 0)
2140                         touch_up_dirs(dir_flist, first_flist->parent_ndx);
2141
2142                 flist_free(first_flist); /* updates first_flist */
2143         }
2144 }
2145
2146 void generate_files(int f_out, const char *local_name)
2147 {
2148         int i, ndx;
2149         char fbuf[MAXPATHLEN];
2150         int itemizing;
2151         enum logcode code;
2152         int save_do_progress = do_progress;
2153
2154         if (protocol_version >= 29) {
2155                 itemizing = 1;
2156                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2157                 code = logfile_format_has_i ? FNONE : FLOG;
2158         } else if (am_daemon) {
2159                 itemizing = logfile_format_has_i && do_xfers;
2160                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2161                 code = itemizing || !do_xfers ? FCLIENT : FINFO;
2162         } else if (!am_server) {
2163                 itemizing = stdout_format_has_i;
2164                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2165                 code = itemizing ? FNONE : FINFO;
2166         } else {
2167                 itemizing = 0;
2168                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2169                 code = FINFO;
2170         }
2171         solo_file = local_name;
2172         dir_tweaking = !(list_only || solo_file || dry_run);
2173         need_retouch_dir_times = preserve_times > 1;
2174         lull_mod = allowed_lull * 5;
2175         symlink_timeset_failed_flags = ITEM_REPORT_TIME
2176             | (protocol_version >= 30 || !am_server ? ITEM_REPORT_TIMEFAIL : 0);
2177         implied_dirs_are_missing = relative_paths && !implied_dirs && protocol_version < 30;
2178
2179         if (verbose > 2)
2180                 rprintf(FINFO, "generator starting pid=%ld\n", (long)getpid());
2181
2182         if (delete_before && !solo_file && cur_flist->used > 0)
2183                 do_delete_pass();
2184         if (delete_during == 2) {
2185                 deldelay_size = BIGPATHBUFLEN * 4;
2186                 deldelay_buf = new_array(char, deldelay_size);
2187                 if (!deldelay_buf)
2188                         out_of_memory("delete-delay");
2189         }
2190         do_progress = 0;
2191
2192         if (append_mode > 0 || whole_file < 0)
2193                 whole_file = 0;
2194         if (verbose >= 2) {
2195                 rprintf(FINFO, "delta-transmission %s\n",
2196                         whole_file
2197                         ? "disabled for local transfer or --whole-file"
2198                         : "enabled");
2199         }
2200
2201         /* Since we often fill up the outgoing socket and then just sit around
2202          * waiting for the other 2 processes to do their thing, we don't want
2203          * to exit on a timeout.  If the data stops flowing, the receiver will
2204          * notice that and let us know via the redo pipe (or its closing). */
2205         ignore_timeout = 1;
2206
2207         dflt_perms = (ACCESSPERMS & ~orig_umask);
2208
2209         do {
2210 #ifdef SUPPORT_HARD_LINKS
2211                 if (preserve_hard_links && inc_recurse) {
2212                         while (!flist_eof && file_total < FILECNT_LOOKAHEAD/2)
2213                                 wait_for_receiver();
2214                 }
2215 #endif
2216
2217                 if (inc_recurse && cur_flist->parent_ndx >= 0) {
2218                         struct file_struct *fp = dir_flist->files[cur_flist->parent_ndx];
2219                         if (solo_file)
2220                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2221                         else
2222                                 f_name(fp, fbuf);
2223                         ndx = cur_flist->ndx_start - 1;
2224                         recv_generator(fbuf, fp, ndx, itemizing, code, f_out);
2225                         if (delete_during && dry_run < 2 && !list_only
2226                          && !(fp->flags & FLAG_MISSING_DIR)) {
2227                                 if (fp->flags & FLAG_CONTENT_DIR) {
2228                                         dev_t dirdev;
2229                                         if (one_file_system) {
2230                                                 uint32 *devp = F_DIR_DEV_P(fp);
2231                                                 dirdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
2232                                         } else
2233                                                 dirdev = MAKEDEV(0, 0);
2234                                         delete_in_dir(fbuf, fp, &dirdev);
2235                                 } else
2236                                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(fp));
2237                         }
2238                 }
2239                 for (i = cur_flist->low; i <= cur_flist->high; i++) {
2240                         struct file_struct *file = cur_flist->sorted[i];
2241
2242                         if (!F_IS_ACTIVE(file))
2243                                 continue;
2244
2245                         if (unsort_ndx)
2246                                 ndx = F_NDX(file);
2247                         else
2248                                 ndx = i + cur_flist->ndx_start;
2249
2250                         if (solo_file)
2251                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2252                         else
2253                                 f_name(file, fbuf);
2254                         recv_generator(fbuf, file, ndx, itemizing, code, f_out);
2255
2256                         check_for_finished_files(itemizing, code, 0);
2257
2258                         if (allowed_lull && !(i % lull_mod))
2259                                 maybe_send_keepalive();
2260                         else if (!(i & 0xFF))
2261                                 maybe_flush_socket(0);
2262                 }
2263
2264                 if (!inc_recurse) {
2265                         write_ndx(f_out, NDX_DONE);
2266                         break;
2267                 }
2268
2269                 while (1) {
2270                         check_for_finished_files(itemizing, code, 1);
2271                         if (cur_flist->next || flist_eof)
2272                                 break;
2273                         wait_for_receiver();
2274                 }
2275         } while ((cur_flist = cur_flist->next) != NULL);
2276
2277         if (delete_during)
2278                 delete_in_dir(NULL, NULL, &dev_zero);
2279         phase++;
2280         if (verbose > 2)
2281                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2282
2283         while (1) {
2284                 check_for_finished_files(itemizing, code, 1);
2285                 if (msgdone_cnt)
2286                         break;
2287                 wait_for_receiver();
2288         }
2289
2290         phase++;
2291         if (verbose > 2)
2292                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2293
2294         write_ndx(f_out, NDX_DONE);
2295         /* Reduce round-trip lag-time for a useless delay-updates phase. */
2296         if (protocol_version >= 29 && !delay_updates)
2297                 write_ndx(f_out, NDX_DONE);
2298
2299         /* Read MSG_DONE for the redo phase (and any prior messages). */
2300         while (1) {
2301                 check_for_finished_files(itemizing, code, 0);
2302                 if (msgdone_cnt > 1)
2303                         break;
2304                 wait_for_receiver();
2305         }
2306
2307         if (protocol_version >= 29) {
2308                 phase++;
2309                 if (verbose > 2)
2310                         rprintf(FINFO, "generate_files phase=%d\n", phase);
2311                 if (delay_updates)
2312                         write_ndx(f_out, NDX_DONE);
2313                 /* Read MSG_DONE for delay-updates phase & prior messages. */
2314                 while (msgdone_cnt == 2)
2315                         wait_for_receiver();
2316         }
2317
2318         do_progress = save_do_progress;
2319         if (delete_during == 2)
2320                 do_delayed_deletions(fbuf);
2321         if (delete_after && !solo_file && file_total > 0)
2322                 do_delete_pass();
2323
2324         if ((need_retouch_dir_perms || need_retouch_dir_times)
2325          && dir_tweaking && (!inc_recurse || delete_during == 2))
2326                 touch_up_dirs(dir_flist, -1);
2327
2328         if (max_delete >= 0 && deletion_count > max_delete) {
2329                 rprintf(FINFO,
2330                         "Deletions stopped due to --max-delete limit (%d skipped)\n",
2331                         deletion_count - max_delete);
2332                 io_error |= IOERR_DEL_LIMIT;
2333         }
2334
2335         if (verbose > 2)
2336                 rprintf(FINFO, "generate_files finished\n");
2337 }