generator.c

   1 /*
   2  * Routines that are exclusive to the generator process.
   3  *
   4  * Copyright (C) 1996-2000 Andrew Tridgell
   5  * Copyright (C) 1996 Paul Mackerras
   6  * Copyright (C) 2002 Martin Pool <mbp@samba.org>
   7  * Copyright (C) 2003-2009 Wayne Davison
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 3 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, visit the http://fsf.org website.
  21  */
  22
  23 #include "rsync.h"
  24 #include "inums.h"
  25 #include "ifuncs.h"
  26
  27 extern int dry_run;
  28 extern int do_xfers;
  29 extern int stdout_format_has_i;
  30 extern int logfile_format_has_i;
  31 extern int am_root;
  32 extern int am_server;
  33 extern int am_daemon;
  34 extern int inc_recurse;
  35 extern int relative_paths;
  36 extern int implied_dirs;
  37 extern int keep_dirlinks;
  38 extern int preserve_acls;
  39 extern int preserve_xattrs;
  40 extern int preserve_links;
  41 extern int preserve_devices;
  42 extern int preserve_specials;
  43 extern int preserve_hard_links;
  44 extern int preserve_executability;
  45 extern int preserve_perms;
  46 extern int preserve_times;
  47 extern int delete_mode;
  48 extern int delete_before;
  49 extern int delete_during;
  50 extern int delete_after;
  51 extern int missing_args;
  52 extern int msgdone_cnt;
  53 extern int ignore_errors;
  54 extern int remove_source_files;
  55 extern int delay_updates;
  56 extern int update_only;
  57 extern int human_readable;
  58 extern int ignore_existing;
  59 extern int ignore_non_existing;
  60 extern int inplace;
  61 extern int append_mode;
  62 extern int make_backups;
  63 extern int csum_length;
  64 extern int ignore_times;
  65 extern int size_only;
  66 extern OFF_T max_size;
  67 extern OFF_T min_size;
  68 extern int io_error;
  69 extern int flist_eof;
  70 extern int allowed_lull;
  71 extern int sock_f_out;
  72 extern int protocol_version;
  73 extern int file_total;
  74 extern int fuzzy_basis;
  75 extern int always_checksum;
  76 extern int checksum_len;
  77 extern char *partial_dir;
  78 extern int compare_dest;
  79 extern int copy_dest;
  80 extern int link_dest;
  81 extern int whole_file;
  82 extern int list_only;
  83 extern int read_batch;
  84 extern int safe_symlinks;
  85 extern long block_size; /* "long" because popt can't set an int32. */
  86 extern int unsort_ndx;
  87 extern int max_delete;
  88 extern int force_delete;
  89 extern int one_file_system;
  90 extern int skipped_deletes;
  91 extern dev_t filesystem_dev;
  92 extern mode_t orig_umask;
  93 extern uid_t our_uid;
  94 extern char *tmpdir;
  95 extern char *basis_dir[MAX_BASIS_DIRS+1];
  96 extern struct file_list *cur_flist, *first_flist, *dir_flist;
  97 extern filter_rule_list filter_list, daemon_filter_list;
  98
  99 int maybe_ATTRS_REPORT = 0;
 100
 101 static dev_t dev_zero;
 102 static int deldelay_size = 0, deldelay_cnt = 0;
 103 static char *deldelay_buf = NULL;
 104 static int deldelay_fd = -1;
 105 static int loopchk_limit;
 106 static int dir_tweaking;
 107 static int symlink_timeset_failed_flags;
 108 static int need_retouch_dir_times;
 109 static int need_retouch_dir_perms;
 110 static const char *solo_file = NULL;
 111
 112 enum nonregtype {
 113     TYPE_DIR, TYPE_SPECIAL, TYPE_DEVICE, TYPE_SYMLINK
 114 };
 115
 116 /* Forward declarations. */
 117 #ifdef SUPPORT_HARD_LINKS
 118 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
 119                                  enum logcode code, int f_out);
 120 #endif
 121
 122 #define EARLY_DELAY_DONE_MSG() (!delay_updates)
 123 #define EARLY_DELETE_DONE_MSG() (!(delete_during == 2 || delete_after))
 124
 125 static int start_delete_delay_temp(void)
 126 {
 127         char fnametmp[MAXPATHLEN];
 128         int save_dry_run = dry_run;
 129
 130         dry_run = 0;
 131         if (!get_tmpname(fnametmp, "deldelay", False)
 132          || (deldelay_fd = do_mkstemp(fnametmp, 0600)) < 0) {
 133                 rprintf(FINFO, "NOTE: Unable to create delete-delay temp file%s.\n",
 134                         inc_recurse ? "" : " -- switching to --delete-after");
 135                 delete_during = 0;
 136                 delete_after = !inc_recurse;
 137                 dry_run = save_dry_run;
 138                 return 0;
 139         }
 140         unlink(fnametmp);
 141         dry_run = save_dry_run;
 142         return 1;
 143 }
 144
 145 static int flush_delete_delay(void)
 146 {
 147         if (deldelay_fd < 0 && !start_delete_delay_temp())
 148                 return 0;
 149         if (write(deldelay_fd, deldelay_buf, deldelay_cnt) != deldelay_cnt) {
 150                 rsyserr(FERROR, errno, "flush of delete-delay buffer");
 151                 delete_during = 0;
 152                 delete_after = !inc_recurse;
 153                 close(deldelay_fd);
 154                 return 0;
 155         }
 156         deldelay_cnt = 0;
 157         return 1;
 158 }
 159
 160 static int remember_delete(struct file_struct *file, const char *fname, int flags)
 161 {
 162         int len;
 163
 164         if (deldelay_cnt == deldelay_size && !flush_delete_delay())
 165                 return 0;
 166
 167         if (flags & DEL_NO_UID_WRITE)
 168                 deldelay_buf[deldelay_cnt++] = '!';
 169
 170         while (1) {
 171                 len = snprintf(deldelay_buf + deldelay_cnt,
 172                                deldelay_size - deldelay_cnt,
 173                                "%x %s%c",
 174                                (int)file->mode, fname, '\0');
 175                 if ((deldelay_cnt += len) <= deldelay_size)
 176                         break;
 177                 deldelay_cnt -= len;
 178                 if (!flush_delete_delay())
 179                         return 0;
 180         }
 181
 182         return 1;
 183 }
 184
 185 static int read_delay_line(char *buf, int *flags_p)
 186 {
 187         static int read_pos = 0;
 188         int j, len, mode;
 189         char *bp, *past_space;
 190
 191         while (1) {
 192                 for (j = read_pos; j < deldelay_cnt && deldelay_buf[j]; j++) {}
 193                 if (j < deldelay_cnt)
 194                         break;
 195                 if (deldelay_fd < 0) {
 196                         if (j > read_pos)
 197                                 goto invalid_data;
 198                         return -1;
 199                 }
 200                 deldelay_cnt -= read_pos;
 201                 if (deldelay_cnt == deldelay_size)
 202                         goto invalid_data;
 203                 if (deldelay_cnt && read_pos) {
 204                         memmove(deldelay_buf, deldelay_buf + read_pos,
 205                                 deldelay_cnt);
 206                 }
 207                 len = read(deldelay_fd, deldelay_buf + deldelay_cnt,
 208                            deldelay_size - deldelay_cnt);
 209                 if (len == 0) {
 210                         if (deldelay_cnt) {
 211                                 rprintf(FERROR,
 212                                     "ERROR: unexpected EOF in delete-delay file.\n");
 213                         }
 214                         return -1;
 215                 }
 216                 if (len < 0) {
 217                         rsyserr(FERROR, errno,
 218                                 "reading delete-delay file");
 219                         return -1;
 220                 }
 221                 deldelay_cnt += len;
 222                 read_pos = 0;
 223         }
 224
 225         bp = deldelay_buf + read_pos;
 226         if (*bp == '!') {
 227                 bp++;
 228                 *flags_p = DEL_NO_UID_WRITE;
 229         } else
 230                 *flags_p = 0;
 231
 232         if (sscanf(bp, "%x ", &mode) != 1) {
 233           invalid_data:
 234                 rprintf(FERROR, "ERROR: invalid data in delete-delay file.\n");
 235                 return -1;
 236         }
 237         past_space = strchr(bp, ' ') + 1;
 238         len = j - read_pos - (past_space - bp) + 1; /* count the '\0' */
 239         read_pos = j + 1;
 240
 241         if (len > MAXPATHLEN) {
 242                 rprintf(FERROR, "ERROR: filename too long in delete-delay file.\n");
 243                 return -1;
 244         }
 245
 246         /* The caller needs the name in a MAXPATHLEN buffer, so we copy it
 247          * instead of returning a pointer to our buffer. */
 248         memcpy(buf, past_space, len);
 249
 250         return mode;
 251 }
 252
 253 static void do_delayed_deletions(char *delbuf)
 254 {
 255         int mode, flags;
 256
 257         if (deldelay_fd >= 0) {
 258                 if (deldelay_cnt && !flush_delete_delay())
 259                         return;
 260                 lseek(deldelay_fd, 0, 0);
 261         }
 262         while ((mode = read_delay_line(delbuf, &flags)) >= 0)
 263                 delete_item(delbuf, mode, flags | DEL_RECURSE);
 264         if (deldelay_fd >= 0)
 265                 close(deldelay_fd);
 266 }
 267
 268 /* This function is used to implement per-directory deletion, and is used by
 269  * all the --delete-WHEN options.  Note that the fbuf pointer must point to a
 270  * MAXPATHLEN buffer with the name of the directory in it (the functions we
 271  * call will append names onto the end, but the old dir value will be restored
 272  * on exit). */
 273 static void delete_in_dir(char *fbuf, struct file_struct *file, dev_t *fs_dev)
 274 {
 275         static int already_warned = 0;
 276         struct file_list *dirlist;
 277         char delbuf[MAXPATHLEN];
 278         int dlen, i;
 279
 280         if (!fbuf) {
 281                 change_local_filter_dir(NULL, 0, 0);
 282                 return;
 283         }
 284
 285         if (DEBUG_GTE(DEL, 2))
 286                 rprintf(FINFO, "delete_in_dir(%s)\n", fbuf);
 287
 288         if (allowed_lull)
 289                 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
 290
 291         if (io_error & IOERR_GENERAL && !ignore_errors) {
 292                 if (already_warned)
 293                         return;
 294                 rprintf(FINFO,
 295                         "IO error encountered -- skipping file deletion\n");
 296                 already_warned = 1;
 297                 return;
 298         }
 299
 300         dlen = strlen(fbuf);
 301         change_local_filter_dir(fbuf, dlen, F_DEPTH(file));
 302
 303         if (one_file_system) {
 304                 if (file->flags & FLAG_TOP_DIR)
 305                         filesystem_dev = *fs_dev;
 306                 else if (filesystem_dev != *fs_dev)
 307                         return;
 308         }
 309
 310         dirlist = get_dirlist(fbuf, dlen, 0);
 311
 312         /* If an item in dirlist is not found in flist, delete it
 313          * from the filesystem. */
 314         for (i = dirlist->used; i--; ) {
 315                 struct file_struct *fp = dirlist->files[i];
 316                 if (!F_IS_ACTIVE(fp))
 317                         continue;
 318                 if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) {
 319                         if (INFO_GTE(MOUNT, 1))
 320                                 rprintf(FINFO, "cannot delete mount point: %s\n",
 321                                         f_name(fp, NULL));
 322                         continue;
 323                 }
 324                 /* Here we want to match regardless of file type.  Replacement
 325                  * of a file with one of another type is handled separately by
 326                  * a delete_item call with a DEL_MAKE_ROOM flag. */
 327                 if (flist_find_ignore_dirness(cur_flist, fp) < 0) {
 328                         int flags = DEL_RECURSE;
 329                         if (!(fp->mode & S_IWUSR) && !am_root && fp->flags & FLAG_OWNED_BY_US)
 330                                 flags |= DEL_NO_UID_WRITE;
 331                         f_name(fp, delbuf);
 332                         if (delete_during == 2) {
 333                                 if (!remember_delete(fp, delbuf, flags))
 334                                         break;
 335                         } else
 336                                 delete_item(delbuf, fp->mode, flags);
 337                 }
 338         }
 339
 340         flist_free(dirlist);
 341 }
 342
 343 /* This deletes any files on the receiving side that are not present on the
 344  * sending side.  This is used by --delete-before and --delete-after. */
 345 static void do_delete_pass(void)
 346 {
 347         char fbuf[MAXPATHLEN];
 348         STRUCT_STAT st;
 349         int j;
 350
 351         /* dry_run is incremented when the destination doesn't exist yet. */
 352         if (dry_run > 1 || list_only)
 353                 return;
 354
 355         for (j = 0; j < cur_flist->used; j++) {
 356                 struct file_struct *file = cur_flist->sorted[j];
 357
 358                 f_name(file, fbuf);
 359
 360                 if (!(file->flags & FLAG_CONTENT_DIR)) {
 361                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(file));
 362                         continue;
 363                 }
 364
 365                 if (DEBUG_GTE(DEL, 1) && file->flags & FLAG_TOP_DIR)
 366                         rprintf(FINFO, "deleting in %s\n", fbuf);
 367
 368                 if (link_stat(fbuf, &st, keep_dirlinks) < 0
 369                  || !S_ISDIR(st.st_mode))
 370                         continue;
 371
 372                 delete_in_dir(fbuf, file, &st.st_dev);
 373         }
 374         delete_in_dir(NULL, NULL, &dev_zero);
 375
 376         if (INFO_GTE(FLIST, 2) && !am_server)
 377                 rprintf(FINFO, "                    \r");
 378 }
 379
 380 static inline int time_differs(struct file_struct *file, stat_x *sxp)
 381 {
 382         return cmp_time(sxp->st.st_mtime, file->modtime);
 383 }
 384
 385 static inline int perms_differ(struct file_struct *file, stat_x *sxp)
 386 {
 387         if (preserve_perms)
 388                 return !BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS);
 389
 390         if (preserve_executability)
 391                 return (sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0);
 392
 393         return 0;
 394 }
 395
 396 static inline int ownership_differs(struct file_struct *file, stat_x *sxp)
 397 {
 398         if (am_root && uid_ndx && sxp->st.st_uid != (uid_t)F_OWNER(file))
 399                 return 1;
 400
 401         if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP) && sxp->st.st_gid != (gid_t)F_GROUP(file))
 402                 return 1;
 403
 404         return 0;
 405 }
 406
 407 #ifdef SUPPORT_ACLS
 408 static inline int acls_differ(const char *fname, struct file_struct *file, stat_x *sxp)
 409 {
 410         if (preserve_acls) {
 411                 if (!ACL_READY(*sxp))
 412                         get_acl(fname, sxp);
 413                 if (set_acl(NULL, file, sxp, file->mode))
 414                         return 1;
 415         }
 416
 417         return 0;
 418 }
 419 #endif
 420
 421 #ifdef SUPPORT_XATTRS
 422 static inline int xattrs_differ(const char *fname, struct file_struct *file, stat_x *sxp)
 423 {
 424         if (preserve_xattrs) {
 425                 if (!XATTR_READY(*sxp))
 426                         get_xattr(fname, sxp);
 427                 if (xattr_diff(file, sxp, 0))
 428                         return 1;
 429         }
 430
 431         return 0;
 432 }
 433 #endif
 434
 435 int unchanged_attrs(const char *fname, struct file_struct *file, stat_x *sxp)
 436 {
 437         if (S_ISLNK(file->mode)) {
 438 #ifdef CAN_SET_SYMLINK_TIMES
 439                 if (preserve_times & PRESERVE_LINK_TIMES && time_differs(file, sxp))
 440                         return 0;
 441 #endif
 442 #ifdef CAN_CHMOD_SYMLINK
 443                 if (perms_differ(file, sxp))
 444                         return 0;
 445 #endif
 446 #ifdef CAN_CHOWN_SYMLINK
 447                 if (ownership_differs(file, sxp))
 448                         return 0;
 449 #endif
 450 #if defined SUPPORT_ACLS && 0 /* no current symlink-ACL support */
 451                 if (acls_differ(fname, file, sxp))
 452                         return 0;
 453 #endif
 454 #if defined SUPPORT_XATTRS && !defined NO_SYMLINK_XATTRS
 455                 if (xattrs_differ(fname, file, sxp))
 456                         return 0;
 457 #endif
 458         } else {
 459                 if (preserve_times && time_differs(file, sxp))
 460                         return 0;
 461                 if (perms_differ(file, sxp))
 462                         return 0;
 463                 if (ownership_differs(file, sxp))
 464                         return 0;
 465 #ifdef SUPPORT_ACLS
 466                 if (acls_differ(fname, file, sxp))
 467                         return 0;
 468 #endif
 469 #ifdef SUPPORT_XATTRS
 470                 if (xattrs_differ(fname, file, sxp))
 471                         return 0;
 472 #endif
 473         }
 474
 475         return 1;
 476 }
 477
 478 void itemize(const char *fnamecmp, struct file_struct *file, int ndx, int statret,
 479              stat_x *sxp, int32 iflags, uchar fnamecmp_type,
 480              const char *xname)
 481 {
 482         if (statret >= 0) { /* A from-dest-dir statret can == 1! */
 483                 int keep_time = !preserve_times ? 0
 484                     : S_ISDIR(file->mode) ? preserve_times & PRESERVE_DIR_TIMES
 485                     : S_ISLNK(file->mode) ? preserve_times & PRESERVE_LINK_TIMES
 486                     : 1;
 487
 488                 if (S_ISREG(file->mode) && F_LENGTH(file) != sxp->st.st_size)
 489                         iflags |= ITEM_REPORT_SIZE;
 490                 if (file->flags & FLAG_TIME_FAILED) { /* symlinks only */
 491                         if (iflags & ITEM_LOCAL_CHANGE)
 492                                 iflags |= symlink_timeset_failed_flags;
 493                 } else if (keep_time
 494                  ? cmp_time(file->modtime, sxp->st.st_mtime) != 0
 495                  : iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !(iflags & ITEM_MATCHED)
 496                   && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
 497                         iflags |= ITEM_REPORT_TIME;
 498 #if !defined HAVE_LCHMOD && !defined HAVE_SETATTRLIST
 499                 if (S_ISLNK(file->mode)) {
 500                         ;
 501                 } else
 502 #endif
 503                 if (preserve_perms) {
 504                         if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
 505                                 iflags |= ITEM_REPORT_PERMS;
 506                 } else if (preserve_executability
 507                  && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
 508                         iflags |= ITEM_REPORT_PERMS;
 509                 if (uid_ndx && am_root && (uid_t)F_OWNER(file) != sxp->st.st_uid)
 510                         iflags |= ITEM_REPORT_OWNER;
 511                 if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP)
 512                     && sxp->st.st_gid != (gid_t)F_GROUP(file))
 513                         iflags |= ITEM_REPORT_GROUP;
 514 #ifdef SUPPORT_ACLS
 515                 if (preserve_acls && !S_ISLNK(file->mode)) {
 516                         if (!ACL_READY(*sxp))
 517                                 get_acl(fnamecmp, sxp);
 518                         if (set_acl(NULL, file, sxp, file->mode))
 519                                 iflags |= ITEM_REPORT_ACL;
 520                 }
 521 #endif
 522 #ifdef SUPPORT_XATTRS
 523                 if (preserve_xattrs) {
 524                         if (!XATTR_READY(*sxp))
 525                                 get_xattr(fnamecmp, sxp);
 526                         if (xattr_diff(file, sxp, 1))
 527                                 iflags |= ITEM_REPORT_XATTR;
 528                 }
 529 #endif
 530         } else {
 531 #ifdef SUPPORT_XATTRS
 532                 if (preserve_xattrs && xattr_diff(file, NULL, 1))
 533                         iflags |= ITEM_REPORT_XATTR;
 534 #endif
 535                 iflags |= ITEM_IS_NEW;
 536         }
 537
 538         iflags &= 0xffff;
 539         if ((iflags & (SIGNIFICANT_ITEM_FLAGS|ITEM_REPORT_XATTR) || INFO_GTE(NAME, 2)
 540           || stdout_format_has_i > 1 || (xname && *xname)) && !read_batch) {
 541                 if (protocol_version >= 29) {
 542                         if (ndx >= 0)
 543                                 write_ndx(sock_f_out, ndx);
 544                         write_shortint(sock_f_out, iflags);
 545                         if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
 546                                 write_byte(sock_f_out, fnamecmp_type);
 547                         if (iflags & ITEM_XNAME_FOLLOWS)
 548                                 write_vstring(sock_f_out, xname, strlen(xname));
 549 #ifdef SUPPORT_XATTRS
 550                         if (preserve_xattrs && do_xfers
 551                          && iflags & (ITEM_REPORT_XATTR|ITEM_TRANSFER)) {
 552                                 int fd = iflags & ITEM_REPORT_XATTR
 553                                       && (protocol_version < 31 || !BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE))
 554                                        ? sock_f_out : -1;
 555                                 send_xattr_request(NULL, file, fd);
 556                         }
 557 #endif
 558                 } else if (ndx >= 0) {
 559                         enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
 560                         log_item(code, file, iflags, xname);
 561                 }
 562         }
 563 }
 564
 565
 566 /* Perform our quick-check heuristic for determining if a file is unchanged. */
 567 int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
 568 {
 569         if (st->st_size != F_LENGTH(file))
 570                 return 0;
 571
 572         /* if always checksum is set then we use the checksum instead
 573            of the file time to determine whether to sync */
 574         if (always_checksum > 0 && S_ISREG(st->st_mode)) {
 575                 char sum[MAX_DIGEST_LEN];
 576                 file_checksum(fn, sum, st->st_size);
 577                 return memcmp(sum, F_SUM(file), checksum_len) == 0;
 578         }
 579
 580         if (size_only > 0)
 581                 return 1;
 582
 583         if (ignore_times)
 584                 return 0;
 585
 586         return cmp_time(st->st_mtime, file->modtime) == 0;
 587 }
 588
 589
 590 /*
 591  * set (initialize) the size entries in the per-file sum_struct
 592  * calculating dynamic block and checksum sizes.
 593  *
 594  * This is only called from generate_and_send_sums() but is a separate
 595  * function to encapsulate the logic.
 596  *
 597  * The block size is a rounded square root of file length.
 598  *
 599  * The checksum size is determined according to:
 600  *     blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
 601  * provided by Donovan Baarda which gives a probability of rsync
 602  * algorithm corrupting data and falling back using the whole md4
 603  * checksums.
 604  *
 605  * This might be made one of several selectable heuristics.
 606  */
 607 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
 608 {
 609         int32 blength;
 610         int s2length;
 611         int64 l;
 612
 613         if (len < 0) {
 614                 /* The file length overflowed our int64 var, so we can't process this file. */
 615                 sum->count = -1; /* indicate overflow error */
 616                 return;
 617         }
 618
 619         if (block_size)
 620                 blength = block_size;
 621         else if (len <= BLOCK_SIZE * BLOCK_SIZE)
 622                 blength = BLOCK_SIZE;
 623         else {
 624                 int32 max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE;
 625                 int32 c;
 626                 int cnt;
 627                 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
 628                 if (c < 0 || c >= max_blength)
 629                         blength = max_blength;
 630                 else {
 631                     blength = 0;
 632                     do {
 633                             blength |= c;
 634                             if (len < (int64)blength * blength)
 635                                     blength &= ~c;
 636                             c >>= 1;
 637                     } while (c >= 8);   /* round to multiple of 8 */
 638                     blength = MAX(blength, BLOCK_SIZE);
 639                 }
 640         }
 641
 642         if (protocol_version < 27) {
 643                 s2length = csum_length;
 644         } else if (csum_length == SUM_LENGTH) {
 645                 s2length = SUM_LENGTH;
 646         } else {
 647                 int32 c;
 648                 int b = BLOCKSUM_BIAS;
 649                 for (l = len; l >>= 1; b += 2) {}
 650                 for (c = blength; (c >>= 1) && b; b--) {}
 651                 /* add a bit, subtract rollsum, round up. */
 652                 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
 653                 s2length = MAX(s2length, csum_length);
 654                 s2length = MIN(s2length, SUM_LENGTH);
 655         }
 656
 657         sum->flength    = len;
 658         sum->blength    = blength;
 659         sum->s2length   = s2length;
 660         sum->remainder  = (int32)(len % blength);
 661         sum->count      = (int32)(l = (len / blength) + (sum->remainder != 0));
 662
 663         if ((int64)sum->count != l)
 664                 sum->count = -1;
 665
 666         if (sum->count && DEBUG_GTE(DELTASUM, 2)) {
 667                 rprintf(FINFO,
 668                         "count=%s rem=%ld blength=%ld s2length=%d flength=%s\n",
 669                         big_num(sum->count), (long)sum->remainder, (long)sum->blength,
 670                         sum->s2length, big_num(sum->flength));
 671         }
 672 }
 673
 674
 675 /*
 676  * Generate and send a stream of signatures/checksums that describe a buffer
 677  *
 678  * Generate approximately one checksum every block_len bytes.
 679  */
 680 static int generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
 681 {
 682         int32 i;
 683         struct map_struct *mapbuf;
 684         struct sum_struct sum;
 685         OFF_T offset = 0;
 686
 687         sum_sizes_sqroot(&sum, len);
 688         if (sum.count < 0)
 689                 return -1;
 690         write_sum_head(f_out, &sum);
 691
 692         if (append_mode > 0 && f_copy < 0)
 693                 return 0;
 694
 695         if (len > 0)
 696                 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
 697         else
 698                 mapbuf = NULL;
 699
 700         for (i = 0; i < sum.count; i++) {
 701                 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
 702                 char *map = map_ptr(mapbuf, offset, n1);
 703                 char sum2[SUM_LENGTH];
 704                 uint32 sum1;
 705
 706                 len -= n1;
 707                 offset += n1;
 708
 709                 if (f_copy >= 0) {
 710                         full_write(f_copy, map, n1);
 711                         if (append_mode > 0)
 712                                 continue;
 713                 }
 714
 715                 sum1 = get_checksum1(map, n1);
 716                 get_checksum2(map, n1, sum2);
 717
 718                 if (DEBUG_GTE(DELTASUM, 3)) {
 719                         rprintf(FINFO,
 720                                 "chunk[%s] offset=%s len=%ld sum1=%08lx\n",
 721                                 big_num(i), big_num(offset - n1), (long)n1,
 722                                 (unsigned long)sum1);
 723                 }
 724                 write_int(f_out, sum1);
 725                 write_buf(f_out, sum2, sum.s2length);
 726         }
 727
 728         if (mapbuf)
 729                 unmap_file(mapbuf);
 730
 731         return 0;
 732 }
 733
 734
 735 /* Try to find a filename in the same dir as "fname" with a similar name. */
 736 static struct file_struct *find_fuzzy(struct file_struct *file, struct file_list *dirlist_array[], uchar *fnamecmp_type_ptr)
 737 {
 738         int fname_len, fname_suf_len;
 739         const char *fname_suf, *fname = file->basename;
 740         uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
 741         int i, j;
 742         struct file_struct *lowest_fp = NULL;
 743
 744         fname_len = strlen(fname);
 745         fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
 746
 747         /* Try to find an exact size+mtime match first. */
 748         for (i = 0; i < fuzzy_basis; i++) {
 749                 struct file_list *dirlist = dirlist_array[i];
 750
 751                 if (!dirlist)
 752                         continue;
 753
 754                 for (j = 0; j < dirlist->used; j++) {
 755                         struct file_struct *fp = dirlist->files[j];
 756
 757                         if (!S_ISREG(fp->mode) || !F_LENGTH(fp) || fp->flags & FLAG_FILE_SENT)
 758                                 continue;
 759
 760                         if (F_LENGTH(fp) == F_LENGTH(file) && cmp_time(fp->modtime, file->modtime) == 0) {
 761                                 if (DEBUG_GTE(FUZZY, 2))
 762                                         rprintf(FINFO, "fuzzy size/modtime match for %s\n", f_name(fp, NULL));
 763                                 *fnamecmp_type_ptr = FNAMECMP_FUZZY + i;
 764                                 return fp;
 765                         }
 766
 767                 }
 768         }
 769
 770         for (i = 0; i < fuzzy_basis; i++) {
 771                 struct file_list *dirlist = dirlist_array[i];
 772
 773                 if (!dirlist)
 774                         continue;
 775
 776                 for (j = 0; j < dirlist->used; j++) {
 777                         struct file_struct *fp = dirlist->files[j];
 778                         const char *suf, *name;
 779                         int len, suf_len;
 780                         uint32 dist;
 781
 782                         if (!S_ISREG(fp->mode) || !F_LENGTH(fp) || fp->flags & FLAG_FILE_SENT)
 783                                 continue;
 784
 785                         name = fp->basename;
 786                         len = strlen(name);
 787                         suf = find_filename_suffix(name, len, &suf_len);
 788
 789                         dist = fuzzy_distance(name, len, fname, fname_len);
 790                         /* Add some extra weight to how well the suffixes match. */
 791                         dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len) * 10;
 792                         if (DEBUG_GTE(FUZZY, 2)) {
 793                                 rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
 794                                         f_name(fp, NULL), (int)(dist>>16), (int)(dist&0xFFFF));
 795                         }
 796                         if (dist <= lowest_dist) {
 797                                 lowest_dist = dist;
 798                                 lowest_fp = fp;
 799                                 *fnamecmp_type_ptr = FNAMECMP_FUZZY + i;
 800                         }
 801                 }
 802         }
 803
 804         return lowest_fp;
 805 }
 806
 807 /* Copy a file found in our --copy-dest handling. */
 808 static int copy_altdest_file(const char *src, const char *dest, struct file_struct *file)
 809 {
 810         char buf[MAXPATHLEN];
 811         const char *copy_to, *partialptr;
 812         int save_preserve_xattrs = preserve_xattrs;
 813         int ok, fd_w;
 814
 815         if (inplace) {
 816                 /* Let copy_file open the destination in place. */
 817                 fd_w = -1;
 818                 copy_to = dest;
 819         } else {
 820                 fd_w = open_tmpfile(buf, dest, file);
 821                 if (fd_w < 0)
 822                         return -1;
 823                 copy_to = buf;
 824         }
 825         cleanup_set(copy_to, NULL, NULL, -1, -1);
 826         if (copy_file(src, copy_to, fd_w, file->mode) < 0) {
 827                 if (INFO_GTE(COPY, 1)) {
 828                         rsyserr(FINFO, errno, "copy_file %s => %s",
 829                                 full_fname(src), copy_to);
 830                 }
 831                 /* Try to clean up. */
 832                 unlink(copy_to);
 833                 cleanup_disable();
 834                 return -1;
 835         }
 836         partialptr = partial_dir ? partial_dir_fname(dest) : NULL;
 837         preserve_xattrs = 0; /* xattrs were copied with file */
 838         ok = finish_transfer(dest, copy_to, src, partialptr, file, 1, 0);
 839         preserve_xattrs = save_preserve_xattrs;
 840         cleanup_disable();
 841         return ok ? 0 : -1;
 842 }
 843
 844 /* This is only called for regular files.  We return -2 if we've finished
 845  * handling the file, -1 if no dest-linking occurred, or a non-negative
 846  * value if we found an alternate basis file. */
 847 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
 848                          char *cmpbuf, stat_x *sxp, int itemizing,
 849                          enum logcode code)
 850 {
 851         int best_match = -1;
 852         int match_level = 0;
 853         int j = 0;
 854
 855         do {
 856                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 857                 if (link_stat(cmpbuf, &sxp->st, 0) < 0 || !S_ISREG(sxp->st.st_mode))
 858                         continue;
 859                 switch (match_level) {
 860                 case 0:
 861                         best_match = j;
 862                         match_level = 1;
 863                         /* FALL THROUGH */
 864                 case 1:
 865                         if (!unchanged_file(cmpbuf, file, &sxp->st))
 866                                 continue;
 867                         best_match = j;
 868                         match_level = 2;
 869                         /* FALL THROUGH */
 870                 case 2:
 871                         if (!unchanged_attrs(cmpbuf, file, sxp))
 872                                 continue;
 873                         best_match = j;
 874                         match_level = 3;
 875                         break;
 876                 }
 877                 break;
 878         } while (basis_dir[++j] != NULL);
 879
 880         if (!match_level)
 881                 return -1;
 882
 883         if (j != best_match) {
 884                 j = best_match;
 885                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 886                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
 887                         return -1;
 888         }
 889
 890         if (match_level == 3 && !copy_dest) {
 891 #ifdef SUPPORT_HARD_LINKS
 892                 if (link_dest) {
 893                         if (!hard_link_one(file, fname, cmpbuf, 1))
 894                                 goto try_a_copy;
 895                         if (preserve_hard_links && F_IS_HLINKED(file))
 896                                 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, j);
 897                         if (!maybe_ATTRS_REPORT && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
 898                                 itemize(cmpbuf, file, ndx, 1, sxp,
 899                                         ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS,
 900                                         0, "");
 901                         }
 902                 } else
 903 #endif
 904                 if (itemizing)
 905                         itemize(cmpbuf, file, ndx, 0, sxp, 0, 0, NULL);
 906                 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT)
 907                         rprintf(FCLIENT, "%s is uptodate\n", fname);
 908                 return -2;
 909         }
 910
 911         if (match_level >= 2) {
 912 #ifdef SUPPORT_HARD_LINKS
 913           try_a_copy: /* Copy the file locally. */
 914 #endif
 915                 if (!dry_run && copy_altdest_file(cmpbuf, fname, file) < 0)
 916                         return -1;
 917                 if (itemizing)
 918                         itemize(cmpbuf, file, ndx, 0, sxp, ITEM_LOCAL_CHANGE, 0, NULL);
 919                 if (maybe_ATTRS_REPORT
 920                  && ((!itemizing && INFO_GTE(NAME, 1) && match_level == 2)
 921                   || (INFO_GTE(NAME, 2) && match_level == 3))) {
 922                         code = match_level == 3 ? FCLIENT : FINFO;
 923                         rprintf(code, "%s%s\n", fname,
 924                                 match_level == 3 ? " is uptodate" : "");
 925                 }
 926 #ifdef SUPPORT_HARD_LINKS
 927                 if (preserve_hard_links && F_IS_HLINKED(file))
 928                         finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, -1);
 929 #endif
 930                 return -2;
 931         }
 932
 933         return FNAMECMP_BASIS_DIR_LOW + j;
 934 }
 935
 936 /* This is only called for non-regular files.  We return -2 if we've finished
 937  * handling the file, or -1 if no dest-linking occurred, or a non-negative
 938  * value if we found an alternate basis file. */
 939 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
 940                          char *cmpbuf, stat_x *sxp, int itemizing,
 941                          enum logcode code)
 942 {
 943         int best_match = -1;
 944         int match_level = 0;
 945         enum nonregtype type;
 946         uint32 *devp;
 947 #ifdef SUPPORT_LINKS
 948         char lnk[MAXPATHLEN];
 949         int len;
 950 #endif
 951         int j = 0;
 952
 953 #ifndef SUPPORT_LINKS
 954         if (S_ISLNK(file->mode))
 955                 return -1;
 956 #endif
 957         if (S_ISDIR(file->mode)) {
 958                 type = TYPE_DIR;
 959         } else if (IS_SPECIAL(file->mode))
 960                 type = TYPE_SPECIAL;
 961         else if (IS_DEVICE(file->mode))
 962                 type = TYPE_DEVICE;
 963 #ifdef SUPPORT_LINKS
 964         else if (S_ISLNK(file->mode))
 965                 type = TYPE_SYMLINK;
 966 #endif
 967         else {
 968                 rprintf(FERROR,
 969                         "internal: try_dests_non() called with invalid mode (%o)\n",
 970                         (int)file->mode);
 971                 exit_cleanup(RERR_UNSUPPORTED);
 972         }
 973
 974         do {
 975                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 976                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
 977                         continue;
 978                 switch (type) {
 979                 case TYPE_DIR:
 980                         if (!S_ISDIR(sxp->st.st_mode))
 981                                 continue;
 982                         break;
 983                 case TYPE_SPECIAL:
 984                         if (!IS_SPECIAL(sxp->st.st_mode))
 985                                 continue;
 986                         break;
 987                 case TYPE_DEVICE:
 988                         if (!IS_DEVICE(sxp->st.st_mode))
 989                                 continue;
 990                         break;
 991                 case TYPE_SYMLINK:
 992 #ifdef SUPPORT_LINKS
 993                         if (!S_ISLNK(sxp->st.st_mode))
 994                                 continue;
 995                         break;
 996 #else
 997                         return -1;
 998 #endif
 999                 }
1000                 if (match_level < 1) {
1001                         match_level = 1;
1002                         best_match = j;
1003                 }
1004                 switch (type) {
1005                 case TYPE_DIR:
1006                 case TYPE_SPECIAL:
1007                         break;
1008                 case TYPE_DEVICE:
1009                         devp = F_RDEV_P(file);
1010                         if (sxp->st.st_rdev != MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)))
1011                                 continue;
1012                         break;
1013                 case TYPE_SYMLINK:
1014 #ifdef SUPPORT_LINKS
1015                         if ((len = do_readlink(cmpbuf, lnk, MAXPATHLEN-1)) <= 0)
1016                                 continue;
1017                         lnk[len] = '\0';
1018                         if (strcmp(lnk, F_SYMLINK(file)) != 0)
1019                                 continue;
1020                         break;
1021 #else
1022                         return -1;
1023 #endif
1024                 }
1025                 if (match_level < 2) {
1026                         match_level = 2;
1027                         best_match = j;
1028                 }
1029                 if (unchanged_attrs(cmpbuf, file, sxp)) {
1030                         match_level = 3;
1031                         best_match = j;
1032                         break;
1033                 }
1034         } while (basis_dir[++j] != NULL);
1035
1036         if (!match_level)
1037                 return -1;
1038
1039         if (j != best_match) {
1040                 j = best_match;
1041                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1042                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1043                         return -1;
1044         }
1045
1046         if (match_level == 3) {
1047 #ifdef SUPPORT_HARD_LINKS
1048                 if (link_dest
1049 #ifndef CAN_HARDLINK_SYMLINK
1050                  && !S_ISLNK(file->mode)
1051 #endif
1052 #ifndef CAN_HARDLINK_SPECIAL
1053                  && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
1054 #endif
1055                  && !S_ISDIR(file->mode)) {
1056                         if (do_link(cmpbuf, fname) < 0) {
1057                                 rsyserr(FERROR_XFER, errno,
1058                                         "failed to hard-link %s with %s",
1059                                         cmpbuf, fname);
1060                                 return j;
1061                         }
1062                         if (preserve_hard_links && F_IS_HLINKED(file))
1063                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1064                 } else
1065 #endif
1066                         match_level = 2;
1067                 if (itemizing && stdout_format_has_i
1068                  && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
1069                         int chg = compare_dest && type != TYPE_DIR ? 0
1070                             : ITEM_LOCAL_CHANGE + (match_level == 3 ? ITEM_XNAME_FOLLOWS : 0);
1071                         char *lp = match_level == 3 ? "" : NULL;
1072                         itemize(cmpbuf, file, ndx, 0, sxp, chg + ITEM_MATCHED, 0, lp);
1073                 }
1074                 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT) {
1075                         rprintf(FCLIENT, "%s%s is uptodate\n",
1076                                 fname, type == TYPE_DIR ? "/" : "");
1077                 }
1078                 return -2;
1079         }
1080
1081         return j;
1082 }
1083
1084 static void list_file_entry(struct file_struct *f)
1085 {
1086         char permbuf[PERMSTRING_SIZE];
1087         int64 len;
1088         int colwidth = human_readable ? 14 : 11;
1089
1090         if (!F_IS_ACTIVE(f)) {
1091                 /* this can happen if duplicate names were removed */
1092                 return;
1093         }
1094
1095         permstring(permbuf, f->mode);
1096         len = F_LENGTH(f);
1097
1098         /* TODO: indicate '+' if the entry has an ACL. */
1099
1100 #ifdef SUPPORT_LINKS
1101         if (preserve_links && S_ISLNK(f->mode)) {
1102                 rprintf(FINFO, "%s %*s %s %s -> %s\n",
1103                         permbuf, colwidth, human_num(len),
1104                         timestring(f->modtime), f_name(f, NULL),
1105                         F_SYMLINK(f));
1106         } else
1107 #endif
1108         if (missing_args == 2 && f->mode == 0) {
1109                 rprintf(FINFO, "%-*s %s\n",
1110                         colwidth + 31, "*missing",
1111                         f_name(f, NULL));
1112         } else {
1113                 rprintf(FINFO, "%s %*s %s %s\n",
1114                         permbuf, colwidth, human_num(len),
1115                         timestring(f->modtime), f_name(f, NULL));
1116         }
1117 }
1118
1119 static int phase = 0;
1120 static int dflt_perms;
1121
1122 static int implied_dirs_are_missing;
1123 /* Helper for recv_generator's skip_dir and dry_missing_dir tests. */
1124 static BOOL is_below(struct file_struct *file, struct file_struct *subtree)
1125 {
1126         return F_DEPTH(file) > F_DEPTH(subtree)
1127                 && (!implied_dirs_are_missing || f_name_has_prefix(file, subtree));
1128 }
1129
1130 /* Acts on the indicated item in cur_flist whose name is fname.  If a dir,
1131  * make sure it exists, and has the right permissions/timestamp info.  For
1132  * all other non-regular files (symlinks, etc.) we create them here.  For
1133  * regular files that have changed, we try to find a basis file and then
1134  * start sending checksums.  The ndx is the file's unique index value.
1135  *
1136  * The fname parameter must point to a MAXPATHLEN buffer!  (e.g it gets
1137  * passed to delete_item(), which can use it during a recursive delete.)
1138  *
1139  * Note that f_out is set to -1 when doing final directory-permission and
1140  * modification-time repair. */
1141 static void recv_generator(char *fname, struct file_struct *file, int ndx,
1142                            int itemizing, enum logcode code, int f_out)
1143 {
1144         static const char *parent_dirname = "";
1145         /* Missing dir not created due to --dry-run; will still be scanned. */
1146         static struct file_struct *dry_missing_dir = NULL;
1147         /* Missing dir whose contents are skipped altogether due to
1148          * --ignore-non-existing, daemon exclude, or mkdir failure. */
1149         static struct file_struct *skip_dir = NULL;
1150         static struct file_list *fuzzy_dirlist[MAX_BASIS_DIRS+1];
1151         static int need_fuzzy_dirlist = 0;
1152         struct file_struct *fuzzy_file = NULL;
1153         int fd = -1, f_copy = -1;
1154         stat_x sx, real_sx;
1155         STRUCT_STAT partial_st;
1156         struct file_struct *back_file = NULL;
1157         int statret, real_ret, stat_errno;
1158         char *fnamecmp, *partialptr, *backupptr = NULL;
1159         char fnamecmpbuf[MAXPATHLEN];
1160         uchar fnamecmp_type;
1161         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1162         int is_dir = !S_ISDIR(file->mode) ? 0
1163                    : inc_recurse && ndx != cur_flist->ndx_start - 1 ? -1
1164                    : 1;
1165
1166         if (DEBUG_GTE(GENR, 1))
1167                 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
1168
1169         if (list_only) {
1170                 if (is_dir < 0
1171                  || (is_dir && !implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1172                         return;
1173                 list_file_entry(file);
1174                 return;
1175         }
1176
1177         if (skip_dir) {
1178                 if (is_below(file, skip_dir)) {
1179                         if (is_dir)
1180                                 file->flags |= FLAG_MISSING_DIR;
1181 #ifdef SUPPORT_HARD_LINKS
1182                         else if (F_IS_HLINKED(file))
1183                                 handle_skipped_hlink(file, itemizing, code, f_out);
1184 #endif
1185                         return;
1186                 }
1187                 skip_dir = NULL;
1188         }
1189
1190         init_stat_x(&sx);
1191         if (daemon_filter_list.head && (*fname != '.' || fname[1])) {
1192                 if (check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
1193                         if (is_dir < 0)
1194                                 return;
1195 #ifdef SUPPORT_HARD_LINKS
1196                         if (F_IS_HLINKED(file))
1197                                 handle_skipped_hlink(file, itemizing, code, f_out);
1198 #endif
1199                         rprintf(FERROR_XFER,
1200                                 "ERROR: daemon refused to receive %s \"%s\"\n",
1201                                 is_dir ? "directory" : "file", fname);
1202                         if (is_dir)
1203                                 goto skipping_dir_contents;
1204                         return;
1205                 }
1206         }
1207
1208         if (dry_run > 1 || (dry_missing_dir && is_below(file, dry_missing_dir))) {
1209                 int i;
1210           parent_is_dry_missing:
1211                 for (i = 0; i < fuzzy_basis; i++) {
1212                         if (fuzzy_dirlist[i]) {
1213                                 flist_free(fuzzy_dirlist[i]);
1214                                 fuzzy_dirlist[i] = NULL;
1215                         }
1216                 }
1217                 parent_dirname = "";
1218                 statret = -1;
1219                 stat_errno = ENOENT;
1220         } else {
1221                 const char *dn = file->dirname ? file->dirname : ".";
1222                 dry_missing_dir = NULL;
1223                 if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
1224                         if (relative_paths && !implied_dirs
1225                          && do_stat(dn, &sx.st) < 0) {
1226                                 if (dry_run)
1227                                         goto parent_is_dry_missing;
1228                                 if (make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0) {
1229                                         rsyserr(FERROR_XFER, errno,
1230                                                 "recv_generator: mkdir %s failed",
1231                                                 full_fname(dn));
1232                                 }
1233                         }
1234                         if (fuzzy_basis) {
1235                                 int i;
1236                                 for (i = 0; i < fuzzy_basis; i++) {
1237                                         if (fuzzy_dirlist[i]) {
1238                                                 flist_free(fuzzy_dirlist[i]);
1239                                                 fuzzy_dirlist[i] = NULL;
1240                                         }
1241                                 }
1242                                 need_fuzzy_dirlist = 1;
1243                         }
1244 #ifdef SUPPORT_ACLS
1245                         if (!preserve_perms)
1246                                 dflt_perms = default_perms_for_dir(dn);
1247 #endif
1248                 }
1249                 parent_dirname = dn;
1250
1251                 if (need_fuzzy_dirlist && S_ISREG(file->mode)) {
1252                         int i;
1253                         strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf);
1254                         for (i = 0; i < fuzzy_basis; i++) {
1255                                 if (i && pathjoin(fnamecmpbuf, MAXPATHLEN, basis_dir[i-1], dn) >= MAXPATHLEN)
1256                                         continue;
1257                                 fuzzy_dirlist[i] = get_dirlist(fnamecmpbuf, -1, GDL_IGNORE_FILTER_RULES);
1258                                 if (fuzzy_dirlist[i] && fuzzy_dirlist[i]->used == 0) {
1259                                         flist_free(fuzzy_dirlist[i]);
1260                                         fuzzy_dirlist[i] = NULL;
1261                                 }
1262                         }
1263                         need_fuzzy_dirlist = 0;
1264                 }
1265
1266                 statret = link_stat(fname, &sx.st, keep_dirlinks && is_dir);
1267                 stat_errno = errno;
1268         }
1269
1270         if (missing_args == 2 && file->mode == 0) {
1271                 if (filter_list.head && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
1272                         return;
1273                 if (statret == 0)
1274                         delete_item(fname, sx.st.st_mode, del_opts);
1275                 return;
1276         }
1277
1278         if (ignore_non_existing > 0 && statret == -1 && stat_errno == ENOENT) {
1279                 if (is_dir) {
1280                         if (is_dir < 0)
1281                                 return;
1282                         skip_dir = file;
1283                         file->flags |= FLAG_MISSING_DIR;
1284                 }
1285 #ifdef SUPPORT_HARD_LINKS
1286                 else if (F_IS_HLINKED(file))
1287                         handle_skipped_hlink(file, itemizing, code, f_out);
1288 #endif
1289                 if (INFO_GTE(SKIP, 1)) {
1290                         rprintf(FINFO, "not creating new %s \"%s\"\n",
1291                                 is_dir ? "directory" : "file", fname);
1292                 }
1293                 return;
1294         }
1295
1296         if (statret == 0 && !(sx.st.st_mode & S_IWUSR)
1297          && !am_root && sx.st.st_uid == our_uid)
1298                 del_opts |= DEL_NO_UID_WRITE;
1299
1300         if (ignore_existing > 0 && statret == 0
1301          && (!is_dir || !S_ISDIR(sx.st.st_mode))) {
1302                 if (INFO_GTE(SKIP, 1) && is_dir >= 0)
1303                         rprintf(FINFO, "%s exists\n", fname);
1304 #ifdef SUPPORT_HARD_LINKS
1305                 if (F_IS_HLINKED(file))
1306                         handle_skipped_hlink(file, itemizing, code, f_out);
1307 #endif
1308                 goto cleanup;
1309         }
1310
1311         fnamecmp = fname;
1312
1313         if (is_dir) {
1314                 mode_t added_perms;
1315                 if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
1316                         goto cleanup;
1317                 if (am_root < 0) {
1318                         /* For --fake-super, the dir must be useable by the copying
1319                          * user, just like it would be for root. */
1320                         added_perms = S_IRUSR|S_IWUSR|S_IXUSR;
1321                 } else
1322                         added_perms = 0;
1323                 if (is_dir < 0) {
1324                         /* In inc_recurse mode we want to make sure any missing
1325                          * directories get created while we're still processing
1326                          * the parent dir (which allows us to touch the parent
1327                          * dir's mtime right away).  We will handle the dir in
1328                          * full later (right before we handle its contents). */
1329                         if (statret == 0
1330                          && (S_ISDIR(sx.st.st_mode)
1331                           || delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0))
1332                                 goto cleanup; /* Any errors get reported later. */
1333                         if (do_mkdir(fname, (file->mode|added_perms) & 0700) == 0)
1334                                 file->flags |= FLAG_DIR_CREATED;
1335                         goto cleanup;
1336                 }
1337                 /* The file to be received is a directory, so we need
1338                  * to prepare appropriately.  If there is already a
1339                  * file of that name and it is *not* a directory, then
1340                  * we need to delete it.  If it doesn't exist, then
1341                  * (perhaps recursively) create it. */
1342                 if (statret == 0 && !S_ISDIR(sx.st.st_mode)) {
1343                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0)
1344                                 goto skipping_dir_contents;
1345                         statret = -1;
1346                 }
1347                 if (dry_run && statret != 0) {
1348                         if (!dry_missing_dir)
1349                                 dry_missing_dir = file;
1350                         file->flags |= FLAG_MISSING_DIR;
1351                 }
1352                 init_stat_x(&real_sx);
1353                 real_sx.st = sx.st;
1354                 real_ret = statret;
1355                 if (file->flags & FLAG_DIR_CREATED)
1356                         statret = -1;
1357                 if (!preserve_perms) { /* See comment in non-dir code below. */
1358                         file->mode = dest_mode(file->mode, sx.st.st_mode,
1359                                                dflt_perms, statret == 0);
1360                 }
1361                 if (statret != 0 && basis_dir[0] != NULL) {
1362                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1363                                               itemizing, code);
1364                         if (j == -2) {
1365                                 itemizing = 0;
1366                                 code = FNONE;
1367                                 statret = 1;
1368                         } else if (j >= 0) {
1369                                 statret = 1;
1370                                 fnamecmp = fnamecmpbuf;
1371                         }
1372                 }
1373                 if (itemizing && f_out != -1) {
1374                         itemize(fnamecmp, file, ndx, statret, &sx,
1375                                 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
1376                 }
1377                 if (real_ret != 0 && do_mkdir(fname,file->mode|added_perms) < 0 && errno != EEXIST) {
1378                         if (!relative_paths || errno != ENOENT
1379                          || make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0
1380                          || (do_mkdir(fname, file->mode|added_perms) < 0 && errno != EEXIST)) {
1381                                 rsyserr(FERROR_XFER, errno,
1382                                         "recv_generator: mkdir %s failed",
1383                                         full_fname(fname));
1384                           skipping_dir_contents:
1385                                 rprintf(FERROR,
1386                                     "*** Skipping any contents from this failed directory ***\n");
1387                                 skip_dir = file;
1388                                 file->flags |= FLAG_MISSING_DIR;
1389                                 goto cleanup;
1390                         }
1391                 }
1392
1393 #ifdef SUPPORT_XATTRS
1394                 if (preserve_xattrs && statret == 1)
1395                         copy_xattrs(fnamecmpbuf, fname);
1396 #endif
1397                 if (set_file_attrs(fname, file, real_ret ? NULL : &real_sx, NULL, 0)
1398                     && INFO_GTE(NAME, 1) && code != FNONE && f_out != -1)
1399                         rprintf(code, "%s/\n", fname);
1400
1401                 /* We need to ensure that the dirs in the transfer have both
1402                  * readable and writable permissions during the time we are
1403                  * putting files within them.  This is then restored to the
1404                  * former permissions after the transfer is done. */
1405 #ifdef HAVE_CHMOD
1406                 if (!am_root && (file->mode & S_IRWXU) != S_IRWXU && dir_tweaking) {
1407                         mode_t mode = file->mode | S_IRWXU;
1408                         if (do_chmod(fname, mode) < 0) {
1409                                 rsyserr(FERROR_XFER, errno,
1410                                         "failed to modify permissions on %s",
1411                                         full_fname(fname));
1412                         }
1413                         need_retouch_dir_perms = 1;
1414                 }
1415 #endif
1416
1417                 if (real_ret != 0 && one_file_system)
1418                         real_sx.st.st_dev = filesystem_dev;
1419                 if (inc_recurse) {
1420                         if (one_file_system) {
1421                                 uint32 *devp = F_DIR_DEV_P(file);
1422                                 DEV_MAJOR(devp) = major(real_sx.st.st_dev);
1423                                 DEV_MINOR(devp) = minor(real_sx.st.st_dev);
1424                         }
1425                 }
1426                 else if (delete_during && f_out != -1 && !phase
1427                     && !(file->flags & FLAG_MISSING_DIR)) {
1428                         if (file->flags & FLAG_CONTENT_DIR)
1429                                 delete_in_dir(fname, file, &real_sx.st.st_dev);
1430                         else
1431                                 change_local_filter_dir(fname, strlen(fname), F_DEPTH(file));
1432                 }
1433                 goto cleanup;
1434         }
1435
1436         /* If we're not preserving permissions, change the file-list's
1437          * mode based on the local permissions and some heuristics. */
1438         if (!preserve_perms) {
1439                 int exists = statret == 0 && !S_ISDIR(sx.st.st_mode);
1440                 file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms,
1441                                        exists);
1442         }
1443
1444 #ifdef SUPPORT_HARD_LINKS
1445         if (preserve_hard_links && F_HLINK_NOT_FIRST(file)
1446          && hard_link_check(file, ndx, fname, statret, &sx, itemizing, code))
1447                 goto cleanup;
1448 #endif
1449
1450         if (preserve_links && S_ISLNK(file->mode)) {
1451 #ifdef SUPPORT_LINKS
1452                 const char *sl = F_SYMLINK(file);
1453                 if (safe_symlinks && unsafe_symlink(sl, fname)) {
1454                         if (INFO_GTE(NAME, 1)) {
1455                                 if (solo_file) {
1456                                         /* fname contains the destination path, but we
1457                                          * want to report the source path. */
1458                                         fname = f_name(file, NULL);
1459                                 }
1460                                 rprintf(FINFO,
1461                                         "ignoring unsafe symlink \"%s\" -> \"%s\"\n",
1462                                         fname, sl);
1463                         }
1464                         return;
1465                 }
1466                 if (statret == 0) {
1467                         char lnk[MAXPATHLEN];
1468                         int len;
1469
1470                         if (S_ISLNK(sx.st.st_mode)
1471                          && (len = do_readlink(fname, lnk, MAXPATHLEN-1)) > 0
1472                          && strncmp(lnk, sl, len) == 0 && sl[len] == '\0') {
1473                                 /* The link is pointing to the right place. */
1474                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1475                                 if (itemizing)
1476                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1477 #if defined SUPPORT_HARD_LINKS && defined CAN_HARDLINK_SYMLINK
1478                                 if (preserve_hard_links && F_IS_HLINKED(file))
1479                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1480 #endif
1481                                 if (remove_source_files == 1)
1482                                         goto return_with_success;
1483                                 goto cleanup;
1484                         }
1485                 } else if (basis_dir[0] != NULL) {
1486                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1487                                               itemizing, code);
1488                         if (j == -2) {
1489 #ifndef CAN_HARDLINK_SYMLINK
1490                                 if (link_dest) {
1491                                         /* Resort to --copy-dest behavior. */
1492                                 } else
1493 #endif
1494                                 if (!copy_dest)
1495                                         goto cleanup;
1496                                 itemizing = 0;
1497                                 code = FNONE;
1498                         } else if (j >= 0)
1499                                 statret = 1;
1500                 }
1501                 if (atomic_create(file, fname, sl, MAKEDEV(0, 0), &sx, statret == 0 ? DEL_FOR_SYMLINK : 0)) {
1502                         set_file_attrs(fname, file, NULL, NULL, 0);
1503                         if (itemizing) {
1504                                 if (statret == 0 && !S_ISLNK(sx.st.st_mode))
1505                                         statret = -1;
1506                                 itemize(fname, file, ndx, statret, &sx,
1507                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1508                         }
1509                         if (code != FNONE && INFO_GTE(NAME, 1))
1510                                 rprintf(code, "%s -> %s\n", fname, sl);
1511 #ifdef SUPPORT_HARD_LINKS
1512                         if (preserve_hard_links && F_IS_HLINKED(file))
1513                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1514 #endif
1515                         /* This does not check remove_source_files == 1
1516                          * because this is one of the items that the old
1517                          * --remove-sent-files option would remove. */
1518                         if (remove_source_files)
1519                                 goto return_with_success;
1520                 }
1521 #endif
1522                 goto cleanup;
1523         }
1524
1525         if ((am_root && preserve_devices && IS_DEVICE(file->mode))
1526          || (preserve_specials && IS_SPECIAL(file->mode))) {
1527                 dev_t rdev;
1528                 int del_for_flag = 0;
1529                 if (IS_DEVICE(file->mode)) {
1530                         uint32 *devp = F_RDEV_P(file);
1531                         rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
1532                 } else
1533                         rdev = 0;
1534                 if (statret == 0) {
1535                         if (IS_DEVICE(file->mode)) {
1536                                 if (!IS_DEVICE(sx.st.st_mode))
1537                                         statret = -1;
1538                                 del_for_flag = DEL_FOR_DEVICE;
1539                         } else {
1540                                 if (!IS_SPECIAL(sx.st.st_mode))
1541                                         statret = -1;
1542                                 del_for_flag = DEL_FOR_SPECIAL;
1543                         }
1544                         if (statret == 0
1545                          && BITS_EQUAL(sx.st.st_mode, file->mode, _S_IFMT)
1546                          && (IS_SPECIAL(sx.st.st_mode) || sx.st.st_rdev == rdev)) {
1547                                 /* The device or special file is identical. */
1548                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1549                                 if (itemizing)
1550                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1551 #ifdef SUPPORT_HARD_LINKS
1552                                 if (preserve_hard_links && F_IS_HLINKED(file))
1553                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1554 #endif
1555                                 if (remove_source_files == 1)
1556                                         goto return_with_success;
1557                                 goto cleanup;
1558                         }
1559                 } else if (basis_dir[0] != NULL) {
1560                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1561                                               itemizing, code);
1562                         if (j == -2) {
1563 #ifndef CAN_HARDLINK_SPECIAL
1564                                 if (link_dest) {
1565                                         /* Resort to --copy-dest behavior. */
1566                                 } else
1567 #endif
1568                                 if (!copy_dest)
1569                                         goto cleanup;
1570                                 itemizing = 0;
1571                                 code = FNONE;
1572                         } else if (j >= 0)
1573                                 statret = 1;
1574                 }
1575                 if (DEBUG_GTE(GENR, 1)) {
1576                         rprintf(FINFO, "mknod(%s, 0%o, [%ld,%ld])\n",
1577                                 fname, (int)file->mode,
1578                                 (long)major(rdev), (long)minor(rdev));
1579                 }
1580                 if (atomic_create(file, fname, NULL, rdev, &sx, del_for_flag)) {
1581                         set_file_attrs(fname, file, NULL, NULL, 0);
1582                         if (itemizing) {
1583                                 itemize(fname, file, ndx, statret, &sx,
1584                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1585                         }
1586                         if (code != FNONE && INFO_GTE(NAME, 1))
1587                                 rprintf(code, "%s\n", fname);
1588 #ifdef SUPPORT_HARD_LINKS
1589                         if (preserve_hard_links && F_IS_HLINKED(file))
1590                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1591 #endif
1592                         if (remove_source_files == 1)
1593                                 goto return_with_success;
1594                 }
1595                 goto cleanup;
1596         }
1597
1598         if (!S_ISREG(file->mode)) {
1599                 if (solo_file)
1600                         fname = f_name(file, NULL);
1601                 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1602                 goto cleanup;
1603         }
1604
1605         if (max_size > 0 && F_LENGTH(file) > max_size) {
1606                 if (INFO_GTE(SKIP, 1)) {
1607                         if (solo_file)
1608                                 fname = f_name(file, NULL);
1609                         rprintf(FINFO, "%s is over max-size\n", fname);
1610                 }
1611                 goto cleanup;
1612         }
1613         if (min_size > 0 && F_LENGTH(file) < min_size) {
1614                 if (INFO_GTE(SKIP, 1)) {
1615                         if (solo_file)
1616                                 fname = f_name(file, NULL);
1617                         rprintf(FINFO, "%s is under min-size\n", fname);
1618                 }
1619                 goto cleanup;
1620         }
1621
1622         if (update_only > 0 && statret == 0
1623             && cmp_time(sx.st.st_mtime, file->modtime) > 0) {
1624                 if (INFO_GTE(SKIP, 1))
1625                         rprintf(FINFO, "%s is newer\n", fname);
1626 #ifdef SUPPORT_HARD_LINKS
1627                 if (F_IS_HLINKED(file))
1628                         handle_skipped_hlink(file, itemizing, code, f_out);
1629 #endif
1630                 goto cleanup;
1631         }
1632
1633         fnamecmp_type = FNAMECMP_FNAME;
1634
1635         if (statret == 0 && !S_ISREG(sx.st.st_mode)) {
1636                 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_FILE) != 0)
1637                         goto cleanup;
1638                 statret = -1;
1639                 stat_errno = ENOENT;
1640         }
1641
1642         if (statret != 0 && basis_dir[0] != NULL) {
1643                 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &sx,
1644                                       itemizing, code);
1645                 if (j == -2) {
1646                         if (remove_source_files == 1)
1647                                 goto return_with_success;
1648                         goto cleanup;
1649                 }
1650                 if (j >= 0) {
1651                         fnamecmp = fnamecmpbuf;
1652                         fnamecmp_type = j;
1653                         statret = 0;
1654                 }
1655         }
1656
1657         init_stat_x(&real_sx);
1658         real_sx.st = sx.st; /* Don't copy xattr/acl pointers, as they would free wrong. */
1659         real_ret = statret;
1660
1661         if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1662             && link_stat(partialptr, &partial_st, 0) == 0
1663             && S_ISREG(partial_st.st_mode)) {
1664                 if (statret != 0)
1665                         goto prepare_to_open;
1666         } else
1667                 partialptr = NULL;
1668
1669         if (statret != 0 && fuzzy_basis) {
1670                 /* Sets fnamecmp_type to FNAMECMP_FUZZY or above. */
1671                 fuzzy_file = find_fuzzy(file, fuzzy_dirlist, &fnamecmp_type);
1672                 if (fuzzy_file) {
1673                         f_name(fuzzy_file, fnamecmpbuf);
1674                         if (DEBUG_GTE(FUZZY, 1)) {
1675                                 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1676                                         fname, fnamecmpbuf);
1677                         }
1678                         sx.st.st_size = F_LENGTH(fuzzy_file);
1679                         statret = 0;
1680                         fnamecmp = fnamecmpbuf;
1681                 }
1682         }
1683
1684         if (statret != 0) {
1685 #ifdef SUPPORT_HARD_LINKS
1686                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1687                         cur_flist->in_progress++;
1688                         goto cleanup;
1689                 }
1690 #endif
1691                 if (stat_errno == ENOENT)
1692                         goto notify_others;
1693                 rsyserr(FERROR_XFER, stat_errno, "recv_generator: failed to stat %s",
1694                         full_fname(fname));
1695                 goto cleanup;
1696         }
1697
1698         if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1699                 ;
1700         else if (fnamecmp_type == FNAMECMP_FUZZY)
1701                 ;
1702         else if (unchanged_file(fnamecmp, file, &sx.st)) {
1703                 if (partialptr) {
1704                         do_unlink(partialptr);
1705                         handle_partial_dir(partialptr, PDIR_DELETE);
1706                 }
1707                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1708                 if (itemizing)
1709                         itemize(fnamecmp, file, ndx, statret, &sx, 0, 0, NULL);
1710 #ifdef SUPPORT_HARD_LINKS
1711                 if (preserve_hard_links && F_IS_HLINKED(file))
1712                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1713 #endif
1714                 if (remove_source_files != 1)
1715                         goto cleanup;
1716           return_with_success:
1717                 if (!dry_run)
1718                         send_msg_int(MSG_SUCCESS, ndx);
1719                 goto cleanup;
1720         }
1721
1722         if (append_mode > 0 && sx.st.st_size >= F_LENGTH(file)) {
1723 #ifdef SUPPORT_HARD_LINKS
1724                 if (F_IS_HLINKED(file))
1725                         handle_skipped_hlink(file, itemizing, code, f_out);
1726 #endif
1727                 goto cleanup;
1728         }
1729
1730   prepare_to_open:
1731         if (partialptr) {
1732                 sx.st = partial_st;
1733                 fnamecmp = partialptr;
1734                 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1735                 statret = 0;
1736         }
1737
1738         if (!do_xfers)
1739                 goto notify_others;
1740
1741         if (read_batch || whole_file) {
1742                 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1743                         if (!(backupptr = get_backup_name(fname)))
1744                                 goto cleanup;
1745                         if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
1746                                 goto pretend_missing;
1747                         if (copy_file(fname, backupptr, -1, back_file->mode) < 0) {
1748                                 unmake_file(back_file);
1749                                 back_file = NULL;
1750                                 goto cleanup;
1751                         }
1752                 }
1753                 goto notify_others;
1754         }
1755
1756         if (fuzzy_dirlist[0]) {
1757                 int j = flist_find(fuzzy_dirlist[0], file);
1758                 if (j >= 0) /* don't use changing file as future fuzzy basis */
1759                         fuzzy_dirlist[0]->files[j]->flags |= FLAG_FILE_SENT;
1760         }
1761
1762         /* open the file */
1763         if ((fd = do_open(fnamecmp, O_RDONLY, 0)) < 0) {
1764                 rsyserr(FERROR, errno, "failed to open %s, continuing",
1765                         full_fname(fnamecmp));
1766           pretend_missing:
1767                 /* pretend the file didn't exist */
1768 #ifdef SUPPORT_HARD_LINKS
1769                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1770                         cur_flist->in_progress++;
1771                         goto cleanup;
1772                 }
1773 #endif
1774                 statret = real_ret = -1;
1775                 goto notify_others;
1776         }
1777
1778         if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1779                 if (!(backupptr = get_backup_name(fname))) {
1780                         close(fd);
1781                         goto cleanup;
1782                 }
1783                 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1784                         close(fd);
1785                         goto pretend_missing;
1786                 }
1787                 if (robust_unlink(backupptr) && errno != ENOENT) {
1788                         rsyserr(FERROR_XFER, errno, "unlink %s",
1789                                 full_fname(backupptr));
1790                         unmake_file(back_file);
1791                         back_file = NULL;
1792                         close(fd);
1793                         goto cleanup;
1794                 }
1795                 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1796                         rsyserr(FERROR_XFER, errno, "open %s", full_fname(backupptr));
1797                         unmake_file(back_file);
1798                         back_file = NULL;
1799                         close(fd);
1800                         goto cleanup;
1801                 }
1802                 fnamecmp_type = FNAMECMP_BACKUP;
1803         }
1804
1805         if (DEBUG_GTE(DELTASUM, 3)) {
1806                 rprintf(FINFO, "gen mapped %s of size %s\n",
1807                         fnamecmp, big_num(sx.st.st_size));
1808         }
1809
1810         if (DEBUG_GTE(DELTASUM, 2))
1811                 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1812
1813   notify_others:
1814         if (remove_source_files && !delay_updates && !phase && !dry_run)
1815                 increment_active_files(ndx, itemizing, code);
1816         if (inc_recurse && !dry_run)
1817                 cur_flist->in_progress++;
1818 #ifdef SUPPORT_HARD_LINKS
1819         if (preserve_hard_links && F_IS_HLINKED(file))
1820                 file->flags |= FLAG_FILE_SENT;
1821 #endif
1822         write_ndx(f_out, ndx);
1823         if (itemizing) {
1824                 int iflags = ITEM_TRANSFER;
1825                 if (always_checksum > 0)
1826                         iflags |= ITEM_REPORT_CHANGE;
1827                 if (fnamecmp_type != FNAMECMP_FNAME)
1828                         iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1829                 if (fnamecmp_type >= FNAMECMP_FUZZY)
1830                         iflags |= ITEM_XNAME_FOLLOWS;
1831                 itemize(fnamecmp, file, -1, real_ret, &real_sx, iflags, fnamecmp_type,
1832                         fuzzy_file ? fuzzy_file->basename : NULL);
1833 #ifdef SUPPORT_ACLS
1834                 if (preserve_acls)
1835                         free_acl(&real_sx);
1836 #endif
1837 #ifdef SUPPORT_XATTRS
1838                 if (preserve_xattrs)
1839                         free_xattr(&real_sx);
1840 #endif
1841         }
1842
1843         if (!do_xfers) {
1844 #ifdef SUPPORT_HARD_LINKS
1845                 if (preserve_hard_links && F_IS_HLINKED(file))
1846                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1847 #endif
1848                 goto cleanup;
1849         }
1850         if (read_batch)
1851                 goto cleanup;
1852
1853         if (statret != 0 || whole_file)
1854                 write_sum_head(f_out, NULL);
1855         else if (sx.st.st_size <= 0) {
1856                 write_sum_head(f_out, NULL);
1857                 close(fd);
1858         } else {
1859                 if (generate_and_send_sums(fd, sx.st.st_size, f_out, f_copy) < 0) {
1860                         rprintf(FWARNING,
1861                             "WARNING: file is too large for checksum sending: %s\n",
1862                             fnamecmp);
1863                         write_sum_head(f_out, NULL);
1864                 }
1865                 close(fd);
1866         }
1867
1868   cleanup:
1869         if (back_file) {
1870                 int save_preserve_xattrs = preserve_xattrs;
1871                 if (f_copy >= 0)
1872                         close(f_copy);
1873 #ifdef SUPPORT_XATTRS
1874                 if (preserve_xattrs) {
1875                         copy_xattrs(fname, backupptr);
1876                         preserve_xattrs = 0;
1877                 }
1878 #endif
1879                 set_file_attrs(backupptr, back_file, NULL, NULL, 0);
1880                 preserve_xattrs = save_preserve_xattrs;
1881                 if (INFO_GTE(BACKUP, 1)) {
1882                         rprintf(FINFO, "backed up %s to %s\n",
1883                                 fname, backupptr);
1884                 }
1885                 unmake_file(back_file);
1886         }
1887
1888 #ifdef SUPPORT_ACLS
1889         if (preserve_acls)
1890                 free_acl(&sx);
1891 #endif
1892 #ifdef SUPPORT_XATTRS
1893         if (preserve_xattrs)
1894                 free_xattr(&sx);
1895 #endif
1896         return;
1897 }
1898
1899 /* If we are replacing an existing hard link, symlink, device, or special file,
1900  * create a temp-name item and rename it into place.  Only a symlink or hard
1901  * link puts a non-NULL value into the lnk arg.  Only a device puts a non-0
1902  * value into the rdev arg.  Specify 0 for the del_for_flag if there is not a
1903  * file to replace.  This returns 1 on success and 0 on failure. */
1904 int atomic_create(struct file_struct *file, char *fname, const char *lnk,
1905                   dev_t rdev, stat_x *sxp, int del_for_flag)
1906 {
1907         char tmpname[MAXPATHLEN];
1908         const char *create_name;
1909         int skip_atomic, dir_in_the_way = del_for_flag && S_ISDIR(sxp->st.st_mode);
1910
1911         if (!del_for_flag || dir_in_the_way || tmpdir || !get_tmpname(tmpname, fname, True))
1912                 skip_atomic = 1;
1913         else
1914                 skip_atomic = 0;
1915
1916         if (del_for_flag) {
1917                 if (make_backups > 0 && !dir_in_the_way) {
1918                         if (!make_backup(fname, skip_atomic))
1919                                 return 0;
1920                 } else if (skip_atomic) {
1921                         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1922                         if (delete_item(fname, sxp->st.st_mode, del_opts | del_for_flag) != 0)
1923                                 return 0;
1924                 }
1925         }
1926
1927         create_name = skip_atomic ? fname : tmpname;
1928
1929         if (lnk) {
1930 #ifdef SUPPORT_LINKS
1931                 if (S_ISLNK(file->mode)
1932 #ifdef SUPPORT_HARD_LINKS /* The first symlink in a hard-linked cluster is always created. */
1933                  && (!F_IS_HLINKED(file) || file->flags & FLAG_HLINK_FIRST)
1934 #endif
1935                  ) {
1936                         if (do_symlink(lnk, create_name) < 0) {
1937                                 rsyserr(FERROR_XFER, errno, "symlink %s -> \"%s\" failed",
1938                                         full_fname(create_name), lnk);
1939                                 return 0;
1940                         }
1941                 } else
1942 #endif
1943 #ifdef SUPPORT_HARD_LINKS
1944                 if (!hard_link_one(file, create_name, lnk, 0))
1945                         return 0;
1946 #endif
1947         } else {
1948                 if (do_mknod(create_name, file->mode, rdev) < 0) {
1949                         rsyserr(FERROR_XFER, errno, "mknod %s failed",
1950                                 full_fname(create_name));
1951                         return 0;
1952                 }
1953         }
1954
1955         if (!skip_atomic) {
1956                 if (do_rename(tmpname, fname) < 0) {
1957                         rsyserr(FERROR_XFER, errno, "rename %s -> \"%s\" failed",
1958                                 full_fname(tmpname), full_fname(fname));
1959                         do_unlink(tmpname);
1960                         return 0;
1961                 }
1962         }
1963
1964         return 1;
1965 }
1966
1967 #ifdef SUPPORT_HARD_LINKS
1968 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
1969                                  enum logcode code, int f_out)
1970 {
1971         char fbuf[MAXPATHLEN];
1972         int new_last_ndx;
1973         struct file_list *save_flist = cur_flist;
1974
1975         /* If we skip the last item in a chain of links and there was a
1976          * prior non-skipped hard-link waiting to finish, finish it now. */
1977         if ((new_last_ndx = skip_hard_link(file, &cur_flist)) < 0)
1978                 return;
1979
1980         file = cur_flist->files[new_last_ndx - cur_flist->ndx_start];
1981         cur_flist->in_progress--; /* undo prior increment */
1982         f_name(file, fbuf);
1983         recv_generator(fbuf, file, new_last_ndx, itemizing, code, f_out);
1984
1985         cur_flist = save_flist;
1986 }
1987 #endif
1988
1989 static void touch_up_dirs(struct file_list *flist, int ndx)
1990 {
1991         static int counter = 0;
1992         struct file_struct *file;
1993         char *fname;
1994         BOOL fix_dir_perms;
1995         int i, start, end;
1996
1997         if (ndx < 0) {
1998                 start = 0;
1999                 end = flist->used - 1;
2000         } else
2001                 start = end = ndx;
2002
2003         /* Fix any directory permissions that were modified during the
2004          * transfer and/or re-set any tweaked modified-time values. */
2005         for (i = start; i <= end; i++, counter++) {
2006                 file = flist->files[i];
2007                 if (!S_ISDIR(file->mode)
2008                  || (!implied_dirs && file->flags & FLAG_IMPLIED_DIR))
2009                         continue;
2010                 if (DEBUG_GTE(TIME, 2)) {
2011                         fname = f_name(file, NULL);
2012                         rprintf(FINFO, "touch_up_dirs: %s (%d)\n",
2013                                 NS(fname), i);
2014                 }
2015                 /* Be sure not to retouch permissions with --fake-super. */
2016                 fix_dir_perms = !am_root && !(file->mode & S_IWUSR);
2017                 if (!F_IS_ACTIVE(file) || file->flags & FLAG_MISSING_DIR
2018                  || !(need_retouch_dir_times || fix_dir_perms))
2019                         continue;
2020                 fname = f_name(file, NULL);
2021                 if (fix_dir_perms)
2022                         do_chmod(fname, file->mode);
2023                 if (need_retouch_dir_times) {
2024                         STRUCT_STAT st;
2025                         if (link_stat(fname, &st, 0) == 0
2026                          && cmp_time(st.st_mtime, file->modtime) != 0)
2027                                 set_modtime(fname, file->modtime, F_MOD_NSEC(file), file->mode);
2028                 }
2029                 if (counter >= loopchk_limit) {
2030                         if (allowed_lull)
2031                                 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
2032                         else
2033                                 maybe_flush_socket(0);
2034                         counter = 0;
2035                 }
2036         }
2037 }
2038
2039 void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
2040 {
2041         struct file_struct *file;
2042         struct file_list *flist;
2043         char fbuf[MAXPATHLEN];
2044         int ndx;
2045
2046         while (1) {
2047 #ifdef SUPPORT_HARD_LINKS
2048                 if (preserve_hard_links && (ndx = get_hlink_num()) != -1) {
2049                         int send_failed = (ndx == -2);
2050                         if (send_failed)
2051                                 ndx = get_hlink_num();
2052                         flist = flist_for_ndx(ndx, "check_for_finished_files.1");
2053                         file = flist->files[ndx - flist->ndx_start];
2054                         assert(file->flags & FLAG_HLINKED);
2055                         if (send_failed)
2056                                 handle_skipped_hlink(file, itemizing, code, sock_f_out);
2057                         else
2058                                 finish_hard_link(file, f_name(file, fbuf), ndx, NULL, itemizing, code, -1);
2059                         flist->in_progress--;
2060                         continue;
2061                 }
2062 #endif
2063
2064                 if (check_redo && (ndx = get_redo_num()) != -1) {
2065                         csum_length = SUM_LENGTH;
2066                         max_size = -max_size;
2067                         min_size = -min_size;
2068                         ignore_existing = -ignore_existing;
2069                         ignore_non_existing = -ignore_non_existing;
2070                         update_only = -update_only;
2071                         always_checksum = -always_checksum;
2072                         size_only = -size_only;
2073                         append_mode = -append_mode;
2074                         make_backups = -make_backups; /* avoid dup backup w/inplace */
2075                         ignore_times++;
2076
2077                         flist = cur_flist;
2078                         cur_flist = flist_for_ndx(ndx, "check_for_finished_files.2");
2079
2080                         file = cur_flist->files[ndx - cur_flist->ndx_start];
2081                         if (solo_file)
2082                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2083                         else
2084                                 f_name(file, fbuf);
2085                         recv_generator(fbuf, file, ndx, itemizing, code, sock_f_out);
2086                         cur_flist->to_redo--;
2087
2088                         cur_flist = flist;
2089
2090                         csum_length = SHORT_SUM_LENGTH;
2091                         max_size = -max_size;
2092                         min_size = -min_size;
2093                         ignore_existing = -ignore_existing;
2094                         ignore_non_existing = -ignore_non_existing;
2095                         update_only = -update_only;
2096                         always_checksum = -always_checksum;
2097                         size_only = -size_only;
2098                         append_mode = -append_mode;
2099                         make_backups = -make_backups;
2100                         ignore_times--;
2101                         continue;
2102                 }
2103
2104                 if (cur_flist == first_flist)
2105                         break;
2106
2107                 /* We only get here if inc_recurse is enabled. */
2108                 if (first_flist->in_progress || first_flist->to_redo)
2109                         break;
2110
2111                 write_ndx(sock_f_out, NDX_DONE);
2112                 if (!read_batch && !flist_eof) {
2113                         int old_total = 0;
2114                         for (flist = first_flist; flist != cur_flist; flist = flist->next)
2115                                 old_total += flist->used;
2116                         maybe_flush_socket(!flist_eof && file_total - old_total < MIN_FILECNT_LOOKAHEAD/2);
2117                 }
2118
2119                 if (delete_during == 2 || !dir_tweaking) {
2120                         /* Skip directory touch-up. */
2121                 } else if (first_flist->parent_ndx >= 0)
2122                         touch_up_dirs(dir_flist, first_flist->parent_ndx);
2123
2124                 flist_free(first_flist); /* updates first_flist */
2125         }
2126 }
2127
2128 void generate_files(int f_out, const char *local_name)
2129 {
2130         int i, ndx, next_loopchk = 0;
2131         char fbuf[MAXPATHLEN];
2132         int itemizing;
2133         enum logcode code;
2134         int save_info_flist = info_levels[INFO_FLIST];
2135         int save_info_progress = info_levels[INFO_PROGRESS];
2136
2137         if (protocol_version >= 29) {
2138                 itemizing = 1;
2139                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2140                 code = logfile_format_has_i ? FNONE : FLOG;
2141         } else if (am_daemon) {
2142                 itemizing = logfile_format_has_i && do_xfers;
2143                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2144                 code = itemizing || !do_xfers ? FCLIENT : FINFO;
2145         } else if (!am_server) {
2146                 itemizing = stdout_format_has_i;
2147                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2148                 code = itemizing ? FNONE : FINFO;
2149         } else {
2150                 itemizing = 0;
2151                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2152                 code = FINFO;
2153         }
2154         solo_file = local_name;
2155         dir_tweaking = !(list_only || solo_file || dry_run);
2156         need_retouch_dir_times = preserve_times & PRESERVE_DIR_TIMES;
2157         loopchk_limit = allowed_lull ? allowed_lull * 5 : 200;
2158         symlink_timeset_failed_flags = ITEM_REPORT_TIME
2159             | (protocol_version >= 30 || !am_server ? ITEM_REPORT_TIMEFAIL : 0);
2160         implied_dirs_are_missing = relative_paths && !implied_dirs && protocol_version < 30;
2161
2162         if (DEBUG_GTE(GENR, 1))
2163                 rprintf(FINFO, "generator starting pid=%d\n", (int)getpid());
2164
2165         if (delete_before && !solo_file && cur_flist->used > 0)
2166                 do_delete_pass();
2167         if (delete_during == 2) {
2168                 deldelay_size = BIGPATHBUFLEN * 4;
2169                 deldelay_buf = new_array(char, deldelay_size);
2170                 if (!deldelay_buf)
2171                         out_of_memory("delete-delay");
2172         }
2173         info_levels[INFO_FLIST] = info_levels[INFO_PROGRESS] = 0;
2174
2175         if (append_mode > 0 || whole_file < 0)
2176                 whole_file = 0;
2177         if (DEBUG_GTE(FLIST, 1)) {
2178                 rprintf(FINFO, "delta-transmission %s\n",
2179                         whole_file
2180                         ? "disabled for local transfer or --whole-file"
2181                         : "enabled");
2182         }
2183
2184         dflt_perms = (ACCESSPERMS & ~orig_umask);
2185
2186         do {
2187 #ifdef SUPPORT_HARD_LINKS
2188                 if (preserve_hard_links && inc_recurse) {
2189                         while (!flist_eof && file_total < MIN_FILECNT_LOOKAHEAD/2)
2190                                 wait_for_receiver();
2191                 }
2192 #endif
2193
2194                 if (inc_recurse && cur_flist->parent_ndx >= 0) {
2195                         struct file_struct *fp = dir_flist->files[cur_flist->parent_ndx];
2196                         if (solo_file)
2197                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2198                         else
2199                                 f_name(fp, fbuf);
2200                         ndx = cur_flist->ndx_start - 1;
2201                         recv_generator(fbuf, fp, ndx, itemizing, code, f_out);
2202                         if (delete_during && dry_run < 2 && !list_only
2203                          && !(fp->flags & FLAG_MISSING_DIR)) {
2204                                 if (fp->flags & FLAG_CONTENT_DIR) {
2205                                         dev_t dirdev;
2206                                         if (one_file_system) {
2207                                                 uint32 *devp = F_DIR_DEV_P(fp);
2208                                                 dirdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
2209                                         } else
2210                                                 dirdev = MAKEDEV(0, 0);
2211                                         delete_in_dir(fbuf, fp, &dirdev);
2212                                 } else
2213                                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(fp));
2214                         }
2215                 }
2216                 for (i = cur_flist->low; i <= cur_flist->high; i++) {
2217                         struct file_struct *file = cur_flist->sorted[i];
2218
2219                         if (!F_IS_ACTIVE(file))
2220                                 continue;
2221
2222                         if (unsort_ndx)
2223                                 ndx = F_NDX(file);
2224                         else
2225                                 ndx = i + cur_flist->ndx_start;
2226
2227                         if (solo_file)
2228                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2229                         else
2230                                 f_name(file, fbuf);
2231                         recv_generator(fbuf, file, ndx, itemizing, code, f_out);
2232
2233                         check_for_finished_files(itemizing, code, 0);
2234
2235                         if (i + cur_flist->ndx_start >= next_loopchk) {
2236                                 if (allowed_lull)
2237                                         maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
2238                                 else
2239                                         maybe_flush_socket(0);
2240                                 next_loopchk += loopchk_limit;
2241                         }
2242                 }
2243
2244                 if (!inc_recurse) {
2245                         write_ndx(f_out, NDX_DONE);
2246                         break;
2247                 }
2248
2249                 while (1) {
2250                         check_for_finished_files(itemizing, code, 1);
2251                         if (cur_flist->next || flist_eof)
2252                                 break;
2253                         wait_for_receiver();
2254                 }
2255         } while ((cur_flist = cur_flist->next) != NULL);
2256
2257         if (delete_during)
2258                 delete_in_dir(NULL, NULL, &dev_zero);
2259         phase++;
2260         if (DEBUG_GTE(GENR, 1))
2261                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2262
2263         while (1) {
2264                 check_for_finished_files(itemizing, code, 1);
2265                 if (msgdone_cnt)
2266                         break;
2267                 wait_for_receiver();
2268         }
2269
2270         phase++;
2271         if (DEBUG_GTE(GENR, 1))
2272                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2273
2274         write_ndx(f_out, NDX_DONE);
2275
2276         /* Reduce round-trip lag-time for a useless delay-updates phase. */
2277         if (protocol_version >= 29 && EARLY_DELAY_DONE_MSG())
2278                 write_ndx(f_out, NDX_DONE);
2279
2280         if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG()) {
2281                 if ((INFO_GTE(STATS, 2) && (delete_mode || force_delete)) || read_batch)
2282                         write_del_stats(f_out);
2283                 if (EARLY_DELAY_DONE_MSG()) /* Can't send this before delay */
2284                         write_ndx(f_out, NDX_DONE);
2285         }
2286
2287         /* Read MSG_DONE for the redo phase (and any prior messages). */
2288         while (1) {
2289                 check_for_finished_files(itemizing, code, 0);
2290                 if (msgdone_cnt > 1)
2291                         break;
2292                 wait_for_receiver();
2293         }
2294
2295         if (protocol_version >= 29) {
2296                 phase++;
2297                 if (DEBUG_GTE(GENR, 1))
2298                         rprintf(FINFO, "generate_files phase=%d\n", phase);
2299                 if (!EARLY_DELAY_DONE_MSG()) {
2300                         write_ndx(f_out, NDX_DONE);
2301                         if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG())
2302                                 write_ndx(f_out, NDX_DONE);
2303                 }
2304                 /* Read MSG_DONE for delay-updates phase & prior messages. */
2305                 while (msgdone_cnt == 2)
2306                         wait_for_receiver();
2307         }
2308
2309         info_levels[INFO_FLIST] = save_info_flist;
2310         info_levels[INFO_PROGRESS] = save_info_progress;
2311
2312         if (delete_during == 2)
2313                 do_delayed_deletions(fbuf);
2314         if (delete_after && !solo_file && file_total > 0)
2315                 do_delete_pass();
2316
2317         if (max_delete >= 0 && skipped_deletes) {
2318                 rprintf(FWARNING,
2319                         "Deletions stopped due to --max-delete limit (%d skipped)\n",
2320                         skipped_deletes);
2321                 io_error |= IOERR_DEL_LIMIT;
2322         }
2323
2324         if (protocol_version >= 31) {
2325                 if (!EARLY_DELETE_DONE_MSG()) {
2326                         if (INFO_GTE(STATS, 2) || read_batch)
2327                                 write_del_stats(f_out);
2328                         write_ndx(f_out, NDX_DONE);
2329                 }
2330
2331                 /* Read MSG_DONE for late-delete phase & prior messages. */
2332                 while (msgdone_cnt == 3)
2333                         wait_for_receiver();
2334         }
2335
2336         if ((need_retouch_dir_perms || need_retouch_dir_times)
2337          && dir_tweaking && (!inc_recurse || delete_during == 2))
2338                 touch_up_dirs(dir_flist, -1);
2339
2340         if (DEBUG_GTE(GENR, 1))
2341                 rprintf(FINFO, "generate_files finished\n");
2342 }