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 && !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 #ifndef 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 int find_fuzzy(struct file_struct *file, struct file_list *dirlist)
 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 j, lowest_j = -1;
 742
 743         fname_len = strlen(fname);
 744         fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
 745
 746         for (j = 0; j < dirlist->used; j++) {
 747                 struct file_struct *fp = dirlist->files[j];
 748                 const char *suf, *name;
 749                 int len, suf_len;
 750                 uint32 dist;
 751
 752                 if (!S_ISREG(fp->mode) || !F_LENGTH(fp)
 753                  || fp->flags & FLAG_FILE_SENT)
 754                         continue;
 755
 756                 name = fp->basename;
 757
 758                 if (F_LENGTH(fp) == F_LENGTH(file)
 759                     && cmp_time(fp->modtime, file->modtime) == 0) {
 760                         if (DEBUG_GTE(FUZZY, 2)) {
 761                                 rprintf(FINFO,
 762                                         "fuzzy size/modtime match for %s\n",
 763                                         name);
 764                         }
 765                         return j;
 766                 }
 767
 768                 len = strlen(name);
 769                 suf = find_filename_suffix(name, len, &suf_len);
 770
 771                 dist = fuzzy_distance(name, len, fname, fname_len);
 772                 /* Add some extra weight to how well the suffixes match. */
 773                 dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len)
 774                       * 10;
 775                 if (DEBUG_GTE(FUZZY, 2)) {
 776                         rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
 777                                 name, (int)(dist>>16), (int)(dist&0xFFFF));
 778                 }
 779                 if (dist <= lowest_dist) {
 780                         lowest_dist = dist;
 781                         lowest_j = j;
 782                 }
 783         }
 784
 785         return lowest_j;
 786 }
 787
 788 /* Copy a file found in our --copy-dest handling. */
 789 static int copy_altdest_file(const char *src, const char *dest, struct file_struct *file)
 790 {
 791         char buf[MAXPATHLEN];
 792         const char *copy_to, *partialptr;
 793         int save_preserve_xattrs = preserve_xattrs;
 794         int ok, fd_w;
 795
 796         if (inplace) {
 797                 /* Let copy_file open the destination in place. */
 798                 fd_w = -1;
 799                 copy_to = dest;
 800         } else {
 801                 fd_w = open_tmpfile(buf, dest, file);
 802                 if (fd_w < 0)
 803                         return -1;
 804                 copy_to = buf;
 805         }
 806         cleanup_set(copy_to, NULL, NULL, -1, -1);
 807         if (copy_file(src, copy_to, fd_w, file->mode) < 0) {
 808                 if (INFO_GTE(COPY, 1)) {
 809                         rsyserr(FINFO, errno, "copy_file %s => %s",
 810                                 full_fname(src), copy_to);
 811                 }
 812                 /* Try to clean up. */
 813                 unlink(copy_to);
 814                 cleanup_disable();
 815                 return -1;
 816         }
 817         partialptr = partial_dir ? partial_dir_fname(dest) : NULL;
 818         preserve_xattrs = 0; /* xattrs were copied with file */
 819         ok = finish_transfer(dest, copy_to, src, partialptr, file, 1, 0);
 820         preserve_xattrs = save_preserve_xattrs;
 821         cleanup_disable();
 822         return ok ? 0 : -1;
 823 }
 824
 825 /* This is only called for regular files.  We return -2 if we've finished
 826  * handling the file, -1 if no dest-linking occurred, or a non-negative
 827  * value if we found an alternate basis file. */
 828 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
 829                          char *cmpbuf, stat_x *sxp, int itemizing,
 830                          enum logcode code)
 831 {
 832         int best_match = -1;
 833         int match_level = 0;
 834         int j = 0;
 835
 836         do {
 837                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 838                 if (link_stat(cmpbuf, &sxp->st, 0) < 0 || !S_ISREG(sxp->st.st_mode))
 839                         continue;
 840                 switch (match_level) {
 841                 case 0:
 842                         best_match = j;
 843                         match_level = 1;
 844                         /* FALL THROUGH */
 845                 case 1:
 846                         if (!unchanged_file(cmpbuf, file, &sxp->st))
 847                                 continue;
 848                         best_match = j;
 849                         match_level = 2;
 850                         /* FALL THROUGH */
 851                 case 2:
 852                         if (!unchanged_attrs(cmpbuf, file, sxp))
 853                                 continue;
 854                         best_match = j;
 855                         match_level = 3;
 856                         break;
 857                 }
 858                 break;
 859         } while (basis_dir[++j] != NULL);
 860
 861         if (!match_level)
 862                 return -1;
 863
 864         if (j != best_match) {
 865                 j = best_match;
 866                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 867                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
 868                         return -1;
 869         }
 870
 871         if (match_level == 3 && !copy_dest) {
 872 #ifdef SUPPORT_HARD_LINKS
 873                 if (link_dest) {
 874                         if (!hard_link_one(file, fname, cmpbuf, 1))
 875                                 goto try_a_copy;
 876                         if (preserve_hard_links && F_IS_HLINKED(file))
 877                                 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, j);
 878                         if (!maybe_ATTRS_REPORT && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
 879                                 itemize(cmpbuf, file, ndx, 1, sxp,
 880                                         ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS,
 881                                         0, "");
 882                         }
 883                 } else
 884 #endif
 885                 if (itemizing)
 886                         itemize(cmpbuf, file, ndx, 0, sxp, 0, 0, NULL);
 887                 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT)
 888                         rprintf(FCLIENT, "%s is uptodate\n", fname);
 889                 return -2;
 890         }
 891
 892         if (match_level >= 2) {
 893 #ifdef SUPPORT_HARD_LINKS
 894           try_a_copy: /* Copy the file locally. */
 895 #endif
 896                 if (!dry_run && copy_altdest_file(cmpbuf, fname, file) < 0)
 897                         return -1;
 898                 if (itemizing)
 899                         itemize(cmpbuf, file, ndx, 0, sxp, ITEM_LOCAL_CHANGE, 0, NULL);
 900                 if (maybe_ATTRS_REPORT
 901                  && ((!itemizing && INFO_GTE(NAME, 1) && match_level == 2)
 902                   || (INFO_GTE(NAME, 2) && match_level == 3))) {
 903                         code = match_level == 3 ? FCLIENT : FINFO;
 904                         rprintf(code, "%s%s\n", fname,
 905                                 match_level == 3 ? " is uptodate" : "");
 906                 }
 907 #ifdef SUPPORT_HARD_LINKS
 908                 if (preserve_hard_links && F_IS_HLINKED(file))
 909                         finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, -1);
 910 #endif
 911                 return -2;
 912         }
 913
 914         return FNAMECMP_BASIS_DIR_LOW + j;
 915 }
 916
 917 /* This is only called for non-regular files.  We return -2 if we've finished
 918  * handling the file, or -1 if no dest-linking occurred, or a non-negative
 919  * value if we found an alternate basis file. */
 920 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
 921                          char *cmpbuf, stat_x *sxp, int itemizing,
 922                          enum logcode code)
 923 {
 924         int best_match = -1;
 925         int match_level = 0;
 926         enum nonregtype type;
 927         uint32 *devp;
 928 #ifdef SUPPORT_LINKS
 929         char lnk[MAXPATHLEN];
 930         int len;
 931 #endif
 932         int j = 0;
 933
 934 #ifndef SUPPORT_LINKS
 935         if (S_ISLNK(file->mode))
 936                 return -1;
 937 #endif
 938         if (S_ISDIR(file->mode)) {
 939                 type = TYPE_DIR;
 940         } else if (IS_SPECIAL(file->mode))
 941                 type = TYPE_SPECIAL;
 942         else if (IS_DEVICE(file->mode))
 943                 type = TYPE_DEVICE;
 944 #ifdef SUPPORT_LINKS
 945         else if (S_ISLNK(file->mode))
 946                 type = TYPE_SYMLINK;
 947 #endif
 948         else {
 949                 rprintf(FERROR,
 950                         "internal: try_dests_non() called with invalid mode (%o)\n",
 951                         (int)file->mode);
 952                 exit_cleanup(RERR_UNSUPPORTED);
 953         }
 954
 955         do {
 956                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 957                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
 958                         continue;
 959                 switch (type) {
 960                 case TYPE_DIR:
 961                         if (!S_ISDIR(sxp->st.st_mode))
 962                                 continue;
 963                         break;
 964                 case TYPE_SPECIAL:
 965                         if (!IS_SPECIAL(sxp->st.st_mode))
 966                                 continue;
 967                         break;
 968                 case TYPE_DEVICE:
 969                         if (!IS_DEVICE(sxp->st.st_mode))
 970                                 continue;
 971                         break;
 972                 case TYPE_SYMLINK:
 973 #ifdef SUPPORT_LINKS
 974                         if (!S_ISLNK(sxp->st.st_mode))
 975                                 continue;
 976                         break;
 977 #else
 978                         return -1;
 979 #endif
 980                 }
 981                 if (match_level < 1) {
 982                         match_level = 1;
 983                         best_match = j;
 984                 }
 985                 switch (type) {
 986                 case TYPE_DIR:
 987                 case TYPE_SPECIAL:
 988                         break;
 989                 case TYPE_DEVICE:
 990                         devp = F_RDEV_P(file);
 991                         if (sxp->st.st_rdev != MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)))
 992                                 continue;
 993                         break;
 994                 case TYPE_SYMLINK:
 995 #ifdef SUPPORT_LINKS
 996                         if ((len = do_readlink(cmpbuf, lnk, MAXPATHLEN-1)) <= 0)
 997                                 continue;
 998                         lnk[len] = '\0';
 999                         if (strcmp(lnk, F_SYMLINK(file)) != 0)
1000                                 continue;
1001                         break;
1002 #else
1003                         return -1;
1004 #endif
1005                 }
1006                 if (match_level < 2) {
1007                         match_level = 2;
1008                         best_match = j;
1009                 }
1010                 if (unchanged_attrs(cmpbuf, file, sxp)) {
1011                         match_level = 3;
1012                         best_match = j;
1013                         break;
1014                 }
1015         } while (basis_dir[++j] != NULL);
1016
1017         if (!match_level)
1018                 return -1;
1019
1020         if (j != best_match) {
1021                 j = best_match;
1022                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1023                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1024                         return -1;
1025         }
1026
1027         if (match_level == 3) {
1028 #ifdef SUPPORT_HARD_LINKS
1029                 if (link_dest
1030 #ifndef CAN_HARDLINK_SYMLINK
1031                  && !S_ISLNK(file->mode)
1032 #endif
1033 #ifndef CAN_HARDLINK_SPECIAL
1034                  && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
1035 #endif
1036                  && !S_ISDIR(file->mode)) {
1037                         if (do_link(cmpbuf, fname) < 0) {
1038                                 rsyserr(FERROR_XFER, errno,
1039                                         "failed to hard-link %s with %s",
1040                                         cmpbuf, fname);
1041                                 return j;
1042                         }
1043                         if (preserve_hard_links && F_IS_HLINKED(file))
1044                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1045                 } else
1046 #endif
1047                         match_level = 2;
1048                 if (itemizing && stdout_format_has_i
1049                  && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
1050                         int chg = compare_dest && type != TYPE_DIR ? 0
1051                             : ITEM_LOCAL_CHANGE + (match_level == 3 ? ITEM_XNAME_FOLLOWS : 0);
1052                         char *lp = match_level == 3 ? "" : NULL;
1053                         itemize(cmpbuf, file, ndx, 0, sxp, chg + ITEM_MATCHED, 0, lp);
1054                 }
1055                 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT) {
1056                         rprintf(FCLIENT, "%s%s is uptodate\n",
1057                                 fname, type == TYPE_DIR ? "/" : "");
1058                 }
1059                 return -2;
1060         }
1061
1062         return j;
1063 }
1064
1065 static void list_file_entry(struct file_struct *f)
1066 {
1067         char permbuf[PERMSTRING_SIZE];
1068         int64 len;
1069         int colwidth = human_readable ? 14 : 11;
1070
1071         if (!F_IS_ACTIVE(f)) {
1072                 /* this can happen if duplicate names were removed */
1073                 return;
1074         }
1075
1076         permstring(permbuf, f->mode);
1077         len = F_LENGTH(f);
1078
1079         /* TODO: indicate '+' if the entry has an ACL. */
1080
1081 #ifdef SUPPORT_LINKS
1082         if (preserve_links && S_ISLNK(f->mode)) {
1083                 rprintf(FINFO, "%s %*s %s %s -> %s\n",
1084                         permbuf, colwidth, human_num(len),
1085                         timestring(f->modtime), f_name(f, NULL),
1086                         F_SYMLINK(f));
1087         } else
1088 #endif
1089         if (missing_args == 2 && f->mode == 0) {
1090                 rprintf(FINFO, "%-*s %s\n",
1091                         colwidth + 31, "*missing",
1092                         f_name(f, NULL));
1093         } else {
1094                 rprintf(FINFO, "%s %*s %s %s\n",
1095                         permbuf, colwidth, human_num(len),
1096                         timestring(f->modtime), f_name(f, NULL));
1097         }
1098 }
1099
1100 static int phase = 0;
1101 static int dflt_perms;
1102
1103 static int implied_dirs_are_missing;
1104 /* Helper for recv_generator's skip_dir and dry_missing_dir tests. */
1105 static BOOL is_below(struct file_struct *file, struct file_struct *subtree)
1106 {
1107         return F_DEPTH(file) > F_DEPTH(subtree)
1108                 && (!implied_dirs_are_missing || f_name_has_prefix(file, subtree));
1109 }
1110
1111 /* Acts on the indicated item in cur_flist whose name is fname.  If a dir,
1112  * make sure it exists, and has the right permissions/timestamp info.  For
1113  * all other non-regular files (symlinks, etc.) we create them here.  For
1114  * regular files that have changed, we try to find a basis file and then
1115  * start sending checksums.  The ndx is the file's unique index value.
1116  *
1117  * The fname parameter must point to a MAXPATHLEN buffer!  (e.g it gets
1118  * passed to delete_item(), which can use it during a recursive delete.)
1119  *
1120  * Note that f_out is set to -1 when doing final directory-permission and
1121  * modification-time repair. */
1122 static void recv_generator(char *fname, struct file_struct *file, int ndx,
1123                            int itemizing, enum logcode code, int f_out)
1124 {
1125         static const char *parent_dirname = "";
1126         /* Missing dir not created due to --dry-run; will still be scanned. */
1127         static struct file_struct *dry_missing_dir = NULL;
1128         /* Missing dir whose contents are skipped altogether due to
1129          * --ignore-non-existing, daemon exclude, or mkdir failure. */
1130         static struct file_struct *skip_dir = NULL;
1131         static struct file_list *fuzzy_dirlist = NULL;
1132         static int need_fuzzy_dirlist = 0;
1133         struct file_struct *fuzzy_file = NULL;
1134         int fd = -1, f_copy = -1;
1135         stat_x sx, real_sx;
1136         STRUCT_STAT partial_st;
1137         struct file_struct *back_file = NULL;
1138         int statret, real_ret, stat_errno;
1139         char *fnamecmp, *partialptr, *backupptr = NULL;
1140         char fnamecmpbuf[MAXPATHLEN];
1141         uchar fnamecmp_type;
1142         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1143         int is_dir = !S_ISDIR(file->mode) ? 0
1144                    : inc_recurse && ndx != cur_flist->ndx_start - 1 ? -1
1145                    : 1;
1146
1147         if (DEBUG_GTE(GENR, 1))
1148                 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
1149
1150         if (list_only) {
1151                 if (is_dir < 0
1152                  || (is_dir && !implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1153                         return;
1154                 list_file_entry(file);
1155                 return;
1156         }
1157
1158         if (skip_dir) {
1159                 if (is_below(file, skip_dir)) {
1160                         if (is_dir)
1161                                 file->flags |= FLAG_MISSING_DIR;
1162 #ifdef SUPPORT_HARD_LINKS
1163                         else if (F_IS_HLINKED(file))
1164                                 handle_skipped_hlink(file, itemizing, code, f_out);
1165 #endif
1166                         return;
1167                 }
1168                 skip_dir = NULL;
1169         }
1170
1171         init_stat_x(&sx);
1172         if (daemon_filter_list.head && (*fname != '.' || fname[1])) {
1173                 if (check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
1174                         if (is_dir < 0)
1175                                 return;
1176 #ifdef SUPPORT_HARD_LINKS
1177                         if (F_IS_HLINKED(file))
1178                                 handle_skipped_hlink(file, itemizing, code, f_out);
1179 #endif
1180                         rprintf(FERROR_XFER,
1181                                 "skipping daemon-excluded %s \"%s\"\n",
1182                                 is_dir ? "directory" : "file", fname);
1183                         if (is_dir)
1184                                 goto skipping_dir_contents;
1185                         return;
1186                 }
1187         }
1188
1189         if (dry_run > 1 || (dry_missing_dir && is_below(file, dry_missing_dir))) {
1190           parent_is_dry_missing:
1191                 if (fuzzy_dirlist) {
1192                         flist_free(fuzzy_dirlist);
1193                         fuzzy_dirlist = NULL;
1194                 }
1195                 parent_dirname = "";
1196                 statret = -1;
1197                 stat_errno = ENOENT;
1198         } else {
1199                 const char *dn = file->dirname ? file->dirname : ".";
1200                 dry_missing_dir = NULL;
1201                 if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
1202                         if (relative_paths && !implied_dirs
1203                          && do_stat(dn, &sx.st) < 0) {
1204                                 if (dry_run)
1205                                         goto parent_is_dry_missing;
1206                                 if (make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0) {
1207                                         rsyserr(FERROR_XFER, errno,
1208                                                 "recv_generator: mkdir %s failed",
1209                                                 full_fname(dn));
1210                                 }
1211                         }
1212                         if (fuzzy_dirlist) {
1213                                 flist_free(fuzzy_dirlist);
1214                                 fuzzy_dirlist = NULL;
1215                         }
1216                         if (fuzzy_basis)
1217                                 need_fuzzy_dirlist = 1;
1218 #ifdef SUPPORT_ACLS
1219                         if (!preserve_perms)
1220                                 dflt_perms = default_perms_for_dir(dn);
1221 #endif
1222                 }
1223                 parent_dirname = dn;
1224
1225                 if (need_fuzzy_dirlist && S_ISREG(file->mode)) {
1226                         strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf);
1227                         fuzzy_dirlist = get_dirlist(fnamecmpbuf, -1, GDL_IGNORE_FILTER_RULES);
1228                         need_fuzzy_dirlist = 0;
1229                 }
1230
1231                 statret = link_stat(fname, &sx.st, keep_dirlinks && is_dir);
1232                 stat_errno = errno;
1233         }
1234
1235         if (missing_args == 2 && file->mode == 0) {
1236                 if (filter_list.head && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
1237                         return;
1238                 if (statret == 0)
1239                         delete_item(fname, sx.st.st_mode, del_opts);
1240                 return;
1241         }
1242
1243         if (ignore_non_existing > 0 && statret == -1 && stat_errno == ENOENT) {
1244                 if (is_dir) {
1245                         if (is_dir < 0)
1246                                 return;
1247                         skip_dir = file;
1248                         file->flags |= FLAG_MISSING_DIR;
1249                 }
1250 #ifdef SUPPORT_HARD_LINKS
1251                 else if (F_IS_HLINKED(file))
1252                         handle_skipped_hlink(file, itemizing, code, f_out);
1253 #endif
1254                 if (INFO_GTE(SKIP, 1)) {
1255                         rprintf(FINFO, "not creating new %s \"%s\"\n",
1256                                 is_dir ? "directory" : "file", fname);
1257                 }
1258                 return;
1259         }
1260
1261         if (statret == 0 && !(sx.st.st_mode & S_IWUSR)
1262          && !am_root && sx.st.st_uid == our_uid)
1263                 del_opts |= DEL_NO_UID_WRITE;
1264
1265         if (ignore_existing > 0 && statret == 0
1266          && (!is_dir || !S_ISDIR(sx.st.st_mode))) {
1267                 if (INFO_GTE(SKIP, 1) && is_dir >= 0)
1268                         rprintf(FINFO, "%s exists\n", fname);
1269 #ifdef SUPPORT_HARD_LINKS
1270                 if (F_IS_HLINKED(file))
1271                         handle_skipped_hlink(file, itemizing, code, f_out);
1272 #endif
1273                 goto cleanup;
1274         }
1275
1276         fnamecmp = fname;
1277
1278         if (is_dir) {
1279                 mode_t added_perms;
1280                 if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
1281                         goto cleanup;
1282                 if (am_root < 0) {
1283                         /* For --fake-super, the dir must be useable by the copying
1284                          * user, just like it would be for root. */
1285                         added_perms = S_IRUSR|S_IWUSR|S_IXUSR;
1286                 } else
1287                         added_perms = 0;
1288                 if (is_dir < 0) {
1289                         /* In inc_recurse mode we want to make sure any missing
1290                          * directories get created while we're still processing
1291                          * the parent dir (which allows us to touch the parent
1292                          * dir's mtime right away).  We will handle the dir in
1293                          * full later (right before we handle its contents). */
1294                         if (statret == 0
1295                          && (S_ISDIR(sx.st.st_mode)
1296                           || delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0))
1297                                 goto cleanup; /* Any errors get reported later. */
1298                         if (do_mkdir(fname, (file->mode|added_perms) & 0700) == 0)
1299                                 file->flags |= FLAG_DIR_CREATED;
1300                         goto cleanup;
1301                 }
1302                 /* The file to be received is a directory, so we need
1303                  * to prepare appropriately.  If there is already a
1304                  * file of that name and it is *not* a directory, then
1305                  * we need to delete it.  If it doesn't exist, then
1306                  * (perhaps recursively) create it. */
1307                 if (statret == 0 && !S_ISDIR(sx.st.st_mode)) {
1308                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0)
1309                                 goto skipping_dir_contents;
1310                         statret = -1;
1311                 }
1312                 if (dry_run && statret != 0) {
1313                         if (!dry_missing_dir)
1314                                 dry_missing_dir = file;
1315                         file->flags |= FLAG_MISSING_DIR;
1316                 }
1317                 real_ret = statret;
1318                 real_sx = sx;
1319                 if (file->flags & FLAG_DIR_CREATED)
1320                         statret = -1;
1321                 if (!preserve_perms) { /* See comment in non-dir code below. */
1322                         file->mode = dest_mode(file->mode, sx.st.st_mode,
1323                                                dflt_perms, statret == 0);
1324                 }
1325                 if (statret != 0 && basis_dir[0] != NULL) {
1326                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1327                                               itemizing, code);
1328                         if (j == -2) {
1329                                 itemizing = 0;
1330                                 code = FNONE;
1331                                 statret = 1;
1332                         } else if (j >= 0) {
1333                                 statret = 1;
1334                                 fnamecmp = fnamecmpbuf;
1335                         }
1336                 }
1337                 if (itemizing && f_out != -1) {
1338                         itemize(fnamecmp, file, ndx, statret, &sx,
1339                                 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
1340                 }
1341                 if (real_ret != 0 && do_mkdir(fname,file->mode|added_perms) < 0 && errno != EEXIST) {
1342                         if (!relative_paths || errno != ENOENT
1343                          || make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0
1344                          || (do_mkdir(fname, file->mode|added_perms) < 0 && errno != EEXIST)) {
1345                                 rsyserr(FERROR_XFER, errno,
1346                                         "recv_generator: mkdir %s failed",
1347                                         full_fname(fname));
1348                           skipping_dir_contents:
1349                                 rprintf(FERROR,
1350                                     "*** Skipping any contents from this failed directory ***\n");
1351                                 skip_dir = file;
1352                                 file->flags |= FLAG_MISSING_DIR;
1353                                 goto cleanup;
1354                         }
1355                 }
1356 #ifdef SUPPORT_XATTRS
1357                 if (preserve_xattrs && statret == 1)
1358                         copy_xattrs(fnamecmpbuf, fname);
1359 #endif
1360                 if (set_file_attrs(fname, file, real_ret ? NULL : &real_sx, NULL, 0)
1361                     && INFO_GTE(NAME, 1) && code != FNONE && f_out != -1)
1362                         rprintf(code, "%s/\n", fname);
1363
1364                 /* We need to ensure that the dirs in the transfer have writable
1365                  * permissions during the time we are putting files within them.
1366                  * This is then fixed after the transfer is done. */
1367 #ifdef HAVE_CHMOD
1368                 if (!am_root && !(file->mode & S_IWUSR) && dir_tweaking) {
1369                         mode_t mode = file->mode | S_IWUSR;
1370                         if (do_chmod(fname, mode) < 0) {
1371                                 rsyserr(FERROR_XFER, errno,
1372                                         "failed to modify permissions on %s",
1373                                         full_fname(fname));
1374                         }
1375                         need_retouch_dir_perms = 1;
1376                 }
1377 #endif
1378
1379                 if (real_ret != 0 && one_file_system)
1380                         real_sx.st.st_dev = filesystem_dev;
1381                 if (inc_recurse) {
1382                         if (one_file_system) {
1383                                 uint32 *devp = F_DIR_DEV_P(file);
1384                                 DEV_MAJOR(devp) = major(real_sx.st.st_dev);
1385                                 DEV_MINOR(devp) = minor(real_sx.st.st_dev);
1386                         }
1387                 }
1388                 else if (delete_during && f_out != -1 && !phase
1389                     && !(file->flags & FLAG_MISSING_DIR)) {
1390                         if (file->flags & FLAG_CONTENT_DIR)
1391                                 delete_in_dir(fname, file, &real_sx.st.st_dev);
1392                         else
1393                                 change_local_filter_dir(fname, strlen(fname), F_DEPTH(file));
1394                 }
1395                 goto cleanup;
1396         }
1397
1398         /* If we're not preserving permissions, change the file-list's
1399          * mode based on the local permissions and some heuristics. */
1400         if (!preserve_perms) {
1401                 int exists = statret == 0 && !S_ISDIR(sx.st.st_mode);
1402                 file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms,
1403                                        exists);
1404         }
1405
1406 #ifdef SUPPORT_HARD_LINKS
1407         if (preserve_hard_links && F_HLINK_NOT_FIRST(file)
1408          && hard_link_check(file, ndx, fname, statret, &sx, itemizing, code))
1409                 goto cleanup;
1410 #endif
1411
1412         if (preserve_links && S_ISLNK(file->mode)) {
1413 #ifdef SUPPORT_LINKS
1414                 const char *sl = F_SYMLINK(file);
1415                 if (safe_symlinks && unsafe_symlink(sl, fname)) {
1416                         if (INFO_GTE(NAME, 1)) {
1417                                 if (solo_file) {
1418                                         /* fname contains the destination path, but we
1419                                          * want to report the source path. */
1420                                         fname = f_name(file, NULL);
1421                                 }
1422                                 rprintf(FINFO,
1423                                         "ignoring unsafe symlink \"%s\" -> \"%s\"\n",
1424                                         fname, sl);
1425                         }
1426                         return;
1427                 }
1428                 if (statret == 0) {
1429                         char lnk[MAXPATHLEN];
1430                         int len;
1431
1432                         if (S_ISLNK(sx.st.st_mode)
1433                          && (len = do_readlink(fname, lnk, MAXPATHLEN-1)) > 0
1434                          && strncmp(lnk, sl, len) == 0 && sl[len] == '\0') {
1435                                 /* The link is pointing to the right place. */
1436                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1437                                 if (itemizing)
1438                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1439 #if defined SUPPORT_HARD_LINKS && defined CAN_HARDLINK_SYMLINK
1440                                 if (preserve_hard_links && F_IS_HLINKED(file))
1441                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1442 #endif
1443                                 if (remove_source_files == 1)
1444                                         goto return_with_success;
1445                                 goto cleanup;
1446                         }
1447                 } else if (basis_dir[0] != NULL) {
1448                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1449                                               itemizing, code);
1450                         if (j == -2) {
1451 #ifndef CAN_HARDLINK_SYMLINK
1452                                 if (link_dest) {
1453                                         /* Resort to --copy-dest behavior. */
1454                                 } else
1455 #endif
1456                                 if (!copy_dest)
1457                                         goto cleanup;
1458                                 itemizing = 0;
1459                                 code = FNONE;
1460                         } else if (j >= 0)
1461                                 statret = 1;
1462                 }
1463                 if (atomic_create(file, fname, sl, MAKEDEV(0, 0), &sx, statret == 0 ? DEL_FOR_SYMLINK : 0)) {
1464                         set_file_attrs(fname, file, NULL, NULL, 0);
1465                         if (itemizing) {
1466                                 if (statret == 0 && !S_ISLNK(sx.st.st_mode))
1467                                         statret = -1;
1468                                 itemize(fname, file, ndx, statret, &sx,
1469                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1470                         }
1471                         if (code != FNONE && INFO_GTE(NAME, 1))
1472                                 rprintf(code, "%s -> %s\n", fname, sl);
1473 #ifdef SUPPORT_HARD_LINKS
1474                         if (preserve_hard_links && F_IS_HLINKED(file))
1475                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1476 #endif
1477                         /* This does not check remove_source_files == 1
1478                          * because this is one of the items that the old
1479                          * --remove-sent-files option would remove. */
1480                         if (remove_source_files)
1481                                 goto return_with_success;
1482                 }
1483 #endif
1484                 goto cleanup;
1485         }
1486
1487         if ((am_root && preserve_devices && IS_DEVICE(file->mode))
1488          || (preserve_specials && IS_SPECIAL(file->mode))) {
1489                 dev_t rdev;
1490                 int del_for_flag = 0;
1491                 if (IS_DEVICE(file->mode)) {
1492                         uint32 *devp = F_RDEV_P(file);
1493                         rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
1494                 } else
1495                         rdev = 0;
1496                 if (statret == 0) {
1497                         if (IS_DEVICE(file->mode)) {
1498                                 if (!IS_DEVICE(sx.st.st_mode))
1499                                         statret = -1;
1500                                 del_for_flag = DEL_FOR_DEVICE;
1501                         } else {
1502                                 if (!IS_SPECIAL(sx.st.st_mode))
1503                                         statret = -1;
1504                                 del_for_flag = DEL_FOR_SPECIAL;
1505                         }
1506                         if (statret == 0
1507                          && BITS_EQUAL(sx.st.st_mode, file->mode, _S_IFMT)
1508                          && (IS_SPECIAL(sx.st.st_mode) || sx.st.st_rdev == rdev)) {
1509                                 /* The device or special file is identical. */
1510                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1511                                 if (itemizing)
1512                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1513 #ifdef SUPPORT_HARD_LINKS
1514                                 if (preserve_hard_links && F_IS_HLINKED(file))
1515                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1516 #endif
1517                                 if (remove_source_files == 1)
1518                                         goto return_with_success;
1519                                 goto cleanup;
1520                         }
1521                 } else if (basis_dir[0] != NULL) {
1522                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1523                                               itemizing, code);
1524                         if (j == -2) {
1525 #ifndef CAN_HARDLINK_SPECIAL
1526                                 if (link_dest) {
1527                                         /* Resort to --copy-dest behavior. */
1528                                 } else
1529 #endif
1530                                 if (!copy_dest)
1531                                         goto cleanup;
1532                                 itemizing = 0;
1533                                 code = FNONE;
1534                         } else if (j >= 0)
1535                                 statret = 1;
1536                 }
1537                 if (DEBUG_GTE(GENR, 1)) {
1538                         rprintf(FINFO, "mknod(%s, 0%o, [%ld,%ld])\n",
1539                                 fname, (int)file->mode,
1540                                 (long)major(rdev), (long)minor(rdev));
1541                 }
1542                 if (atomic_create(file, fname, NULL, rdev, &sx, del_for_flag)) {
1543                         set_file_attrs(fname, file, NULL, NULL, 0);
1544                         if (itemizing) {
1545                                 itemize(fname, file, ndx, statret, &sx,
1546                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1547                         }
1548                         if (code != FNONE && INFO_GTE(NAME, 1))
1549                                 rprintf(code, "%s\n", fname);
1550 #ifdef SUPPORT_HARD_LINKS
1551                         if (preserve_hard_links && F_IS_HLINKED(file))
1552                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1553 #endif
1554                         if (remove_source_files == 1)
1555                                 goto return_with_success;
1556                 }
1557                 goto cleanup;
1558         }
1559
1560         if (!S_ISREG(file->mode)) {
1561                 if (solo_file)
1562                         fname = f_name(file, NULL);
1563                 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1564                 goto cleanup;
1565         }
1566
1567         if (max_size > 0 && F_LENGTH(file) > max_size) {
1568                 if (INFO_GTE(SKIP, 1)) {
1569                         if (solo_file)
1570                                 fname = f_name(file, NULL);
1571                         rprintf(FINFO, "%s is over max-size\n", fname);
1572                 }
1573                 goto cleanup;
1574         }
1575         if (min_size > 0 && F_LENGTH(file) < min_size) {
1576                 if (INFO_GTE(SKIP, 1)) {
1577                         if (solo_file)
1578                                 fname = f_name(file, NULL);
1579                         rprintf(FINFO, "%s is under min-size\n", fname);
1580                 }
1581                 goto cleanup;
1582         }
1583
1584         if (update_only > 0 && statret == 0
1585             && cmp_time(sx.st.st_mtime, file->modtime) > 0) {
1586                 if (INFO_GTE(SKIP, 1))
1587                         rprintf(FINFO, "%s is newer\n", fname);
1588 #ifdef SUPPORT_HARD_LINKS
1589                 if (F_IS_HLINKED(file))
1590                         handle_skipped_hlink(file, itemizing, code, f_out);
1591 #endif
1592                 goto cleanup;
1593         }
1594
1595         fnamecmp_type = FNAMECMP_FNAME;
1596
1597         if (statret == 0 && !S_ISREG(sx.st.st_mode)) {
1598                 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_FILE) != 0)
1599                         goto cleanup;
1600                 statret = -1;
1601                 stat_errno = ENOENT;
1602         }
1603
1604         if (statret != 0 && basis_dir[0] != NULL) {
1605                 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &sx,
1606                                       itemizing, code);
1607                 if (j == -2) {
1608                         if (remove_source_files == 1)
1609                                 goto return_with_success;
1610                         goto cleanup;
1611                 }
1612                 if (j >= 0) {
1613                         fnamecmp = fnamecmpbuf;
1614                         fnamecmp_type = j;
1615                         statret = 0;
1616                 }
1617         }
1618
1619         real_ret = statret;
1620         real_sx = sx;
1621
1622         if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1623             && link_stat(partialptr, &partial_st, 0) == 0
1624             && S_ISREG(partial_st.st_mode)) {
1625                 if (statret != 0)
1626                         goto prepare_to_open;
1627         } else
1628                 partialptr = NULL;
1629
1630         if (statret != 0 && fuzzy_dirlist) {
1631                 int j = find_fuzzy(file, fuzzy_dirlist);
1632                 if (j >= 0) {
1633                         fuzzy_file = fuzzy_dirlist->files[j];
1634                         f_name(fuzzy_file, fnamecmpbuf);
1635                         if (DEBUG_GTE(FUZZY, 1)) {
1636                                 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1637                                         fname, fnamecmpbuf);
1638                         }
1639                         sx.st.st_size = F_LENGTH(fuzzy_file);
1640                         statret = 0;
1641                         fnamecmp = fnamecmpbuf;
1642                         fnamecmp_type = FNAMECMP_FUZZY;
1643                 }
1644         }
1645
1646         if (statret != 0) {
1647 #ifdef SUPPORT_HARD_LINKS
1648                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1649                         cur_flist->in_progress++;
1650                         goto cleanup;
1651                 }
1652 #endif
1653                 if (stat_errno == ENOENT)
1654                         goto notify_others;
1655                 rsyserr(FERROR_XFER, stat_errno, "recv_generator: failed to stat %s",
1656                         full_fname(fname));
1657                 goto cleanup;
1658         }
1659
1660         if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1661                 ;
1662         else if (fnamecmp_type == FNAMECMP_FUZZY)
1663                 ;
1664         else if (unchanged_file(fnamecmp, file, &sx.st)) {
1665                 if (partialptr) {
1666                         do_unlink(partialptr);
1667                         handle_partial_dir(partialptr, PDIR_DELETE);
1668                 }
1669                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1670                 if (itemizing)
1671                         itemize(fnamecmp, file, ndx, statret, &sx, 0, 0, NULL);
1672 #ifdef SUPPORT_HARD_LINKS
1673                 if (preserve_hard_links && F_IS_HLINKED(file))
1674                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1675 #endif
1676                 if (remove_source_files != 1)
1677                         goto cleanup;
1678           return_with_success:
1679                 if (!dry_run)
1680                         send_msg_int(MSG_SUCCESS, ndx);
1681                 goto cleanup;
1682         }
1683
1684         if (append_mode > 0 && sx.st.st_size >= F_LENGTH(file)) {
1685 #ifdef SUPPORT_HARD_LINKS
1686                 if (F_IS_HLINKED(file))
1687                         handle_skipped_hlink(file, itemizing, code, f_out);
1688 #endif
1689                 goto cleanup;
1690         }
1691
1692   prepare_to_open:
1693         if (partialptr) {
1694                 sx.st = partial_st;
1695                 fnamecmp = partialptr;
1696                 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1697                 statret = 0;
1698         }
1699
1700         if (!do_xfers)
1701                 goto notify_others;
1702
1703         if (read_batch || whole_file) {
1704                 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1705                         if (!(backupptr = get_backup_name(fname)))
1706                                 goto cleanup;
1707                         if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
1708                                 goto pretend_missing;
1709                         if (copy_file(fname, backupptr, -1, back_file->mode) < 0) {
1710                                 unmake_file(back_file);
1711                                 back_file = NULL;
1712                                 goto cleanup;
1713                         }
1714                 }
1715                 goto notify_others;
1716         }
1717
1718         if (fuzzy_dirlist) {
1719                 int j = flist_find(fuzzy_dirlist, file);
1720                 if (j >= 0) /* don't use changing file as future fuzzy basis */
1721                         fuzzy_dirlist->files[j]->flags |= FLAG_FILE_SENT;
1722         }
1723
1724         /* open the file */
1725         if ((fd = do_open(fnamecmp, O_RDONLY, 0)) < 0) {
1726                 rsyserr(FERROR, errno, "failed to open %s, continuing",
1727                         full_fname(fnamecmp));
1728           pretend_missing:
1729                 /* pretend the file didn't exist */
1730 #ifdef SUPPORT_HARD_LINKS
1731                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1732                         cur_flist->in_progress++;
1733                         goto cleanup;
1734                 }
1735 #endif
1736                 statret = real_ret = -1;
1737                 goto notify_others;
1738         }
1739
1740         if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1741                 if (!(backupptr = get_backup_name(fname))) {
1742                         close(fd);
1743                         goto cleanup;
1744                 }
1745                 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1746                         close(fd);
1747                         goto pretend_missing;
1748                 }
1749                 if (robust_unlink(backupptr) && errno != ENOENT) {
1750                         rsyserr(FERROR_XFER, errno, "unlink %s",
1751                                 full_fname(backupptr));
1752                         unmake_file(back_file);
1753                         back_file = NULL;
1754                         close(fd);
1755                         goto cleanup;
1756                 }
1757                 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1758                         rsyserr(FERROR_XFER, errno, "open %s", full_fname(backupptr));
1759                         unmake_file(back_file);
1760                         back_file = NULL;
1761                         close(fd);
1762                         goto cleanup;
1763                 }
1764                 fnamecmp_type = FNAMECMP_BACKUP;
1765         }
1766
1767         if (DEBUG_GTE(DELTASUM, 3)) {
1768                 rprintf(FINFO, "gen mapped %s of size %s\n",
1769                         fnamecmp, big_num(sx.st.st_size));
1770         }
1771
1772         if (DEBUG_GTE(DELTASUM, 2))
1773                 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1774
1775   notify_others:
1776         if (remove_source_files && !delay_updates && !phase && !dry_run)
1777                 increment_active_files(ndx, itemizing, code);
1778         if (inc_recurse && !dry_run)
1779                 cur_flist->in_progress++;
1780 #ifdef SUPPORT_HARD_LINKS
1781         if (preserve_hard_links && F_IS_HLINKED(file))
1782                 file->flags |= FLAG_FILE_SENT;
1783 #endif
1784         write_ndx(f_out, ndx);
1785         if (itemizing) {
1786                 int iflags = ITEM_TRANSFER;
1787                 if (always_checksum > 0)
1788                         iflags |= ITEM_REPORT_CHANGE;
1789                 if (fnamecmp_type != FNAMECMP_FNAME)
1790                         iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1791                 if (fnamecmp_type == FNAMECMP_FUZZY)
1792                         iflags |= ITEM_XNAME_FOLLOWS;
1793                 itemize(fnamecmp, file, -1, real_ret, &real_sx, iflags, fnamecmp_type,
1794                         fuzzy_file ? fuzzy_file->basename : NULL);
1795 #ifdef SUPPORT_ACLS
1796                 if (preserve_acls)
1797                         free_acl(&real_sx);
1798 #endif
1799 #ifdef SUPPORT_XATTRS
1800                 if (preserve_xattrs)
1801                         free_xattr(&real_sx);
1802 #endif
1803         }
1804
1805         if (!do_xfers) {
1806 #ifdef SUPPORT_HARD_LINKS
1807                 if (preserve_hard_links && F_IS_HLINKED(file))
1808                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1809 #endif
1810                 goto cleanup;
1811         }
1812         if (read_batch)
1813                 goto cleanup;
1814
1815         if (statret != 0 || whole_file)
1816                 write_sum_head(f_out, NULL);
1817         else if (sx.st.st_size <= 0) {
1818                 write_sum_head(f_out, NULL);
1819                 close(fd);
1820         } else {
1821                 if (generate_and_send_sums(fd, sx.st.st_size, f_out, f_copy) < 0) {
1822                         rprintf(FWARNING,
1823                             "WARNING: file is too large for checksum sending: %s\n",
1824                             fnamecmp);
1825                         write_sum_head(f_out, NULL);
1826                 }
1827                 close(fd);
1828         }
1829
1830   cleanup:
1831         if (back_file) {
1832                 int save_preserve_xattrs = preserve_xattrs;
1833                 if (f_copy >= 0)
1834                         close(f_copy);
1835 #ifdef SUPPORT_XATTRS
1836                 if (preserve_xattrs) {
1837                         copy_xattrs(fname, backupptr);
1838                         preserve_xattrs = 0;
1839                 }
1840 #endif
1841                 set_file_attrs(backupptr, back_file, NULL, NULL, 0);
1842                 preserve_xattrs = save_preserve_xattrs;
1843                 if (INFO_GTE(BACKUP, 1)) {
1844                         rprintf(FINFO, "backed up %s to %s\n",
1845                                 fname, backupptr);
1846                 }
1847                 unmake_file(back_file);
1848         }
1849
1850 #ifdef SUPPORT_ACLS
1851         if (preserve_acls)
1852                 free_acl(&sx);
1853 #endif
1854 #ifdef SUPPORT_XATTRS
1855         if (preserve_xattrs)
1856                 free_xattr(&sx);
1857 #endif
1858         return;
1859 }
1860
1861 /* If we are replacing an existing hard link, symlink, device, or special file,
1862  * create a temp-name item and rename it into place.  Only a symlink or hard
1863  * link puts a non-NULL value into the lnk arg.  Only a device puts a non-0
1864  * value into the rdev arg.  Specify 0 for the del_for_flag if there is not a
1865  * file to replace.  This returns 1 on success and 0 on failure. */
1866 int atomic_create(struct file_struct *file, char *fname, const char *lnk,
1867                   dev_t rdev, stat_x *sxp, int del_for_flag)
1868 {
1869         char tmpname[MAXPATHLEN];
1870         const char *create_name;
1871         int skip_atomic, dir_in_the_way = del_for_flag && S_ISDIR(sxp->st.st_mode);
1872
1873         if (!del_for_flag || dir_in_the_way || tmpdir || !get_tmpname(tmpname, fname, True))
1874                 skip_atomic = 1;
1875         else
1876                 skip_atomic = 0;
1877
1878         if (del_for_flag) {
1879                 if (make_backups > 0 && !dir_in_the_way) {
1880                         if (!make_backup(fname, skip_atomic))
1881                                 return 0;
1882                 } else if (skip_atomic) {
1883                         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1884                         if (delete_item(fname, sxp->st.st_mode, del_opts | del_for_flag) != 0)
1885                                 return 0;
1886                 }
1887         }
1888
1889         create_name = skip_atomic ? fname : tmpname;
1890
1891         if (lnk) {
1892 #ifdef SUPPORT_LINKS
1893                 if (S_ISLNK(file->mode)
1894 #ifdef SUPPORT_HARD_LINKS /* The first symlink in a hard-linked cluster is always created. */
1895                  && (!F_IS_HLINKED(file) || file->flags & FLAG_HLINK_FIRST)
1896 #endif
1897                  ) {
1898                         if (do_symlink(lnk, create_name) < 0) {
1899                                 rsyserr(FERROR_XFER, errno, "symlink %s -> \"%s\" failed",
1900                                         full_fname(create_name), lnk);
1901                                 return 0;
1902                         }
1903                 } else
1904 #endif
1905 #ifdef SUPPORT_HARD_LINKS
1906                 if (!hard_link_one(file, create_name, lnk, 0))
1907                         return 0;
1908 #endif
1909         } else {
1910                 if (do_mknod(create_name, file->mode, rdev) < 0) {
1911                         rsyserr(FERROR_XFER, errno, "mknod %s failed",
1912                                 full_fname(create_name));
1913                         return 0;
1914                 }
1915         }
1916
1917         if (!skip_atomic) {
1918                 if (do_rename(tmpname, fname) < 0) {
1919                         rsyserr(FERROR_XFER, errno, "rename %s -> \"%s\" failed",
1920                                 full_fname(tmpname), full_fname(fname));
1921                         do_unlink(tmpname);
1922                         return 0;
1923                 }
1924         }
1925
1926         return 1;
1927 }
1928
1929 #ifdef SUPPORT_HARD_LINKS
1930 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
1931                                  enum logcode code, int f_out)
1932 {
1933         char fbuf[MAXPATHLEN];
1934         int new_last_ndx;
1935         struct file_list *save_flist = cur_flist;
1936
1937         /* If we skip the last item in a chain of links and there was a
1938          * prior non-skipped hard-link waiting to finish, finish it now. */
1939         if ((new_last_ndx = skip_hard_link(file, &cur_flist)) < 0)
1940                 return;
1941
1942         file = cur_flist->files[new_last_ndx - cur_flist->ndx_start];
1943         cur_flist->in_progress--; /* undo prior increment */
1944         f_name(file, fbuf);
1945         recv_generator(fbuf, file, new_last_ndx, itemizing, code, f_out);
1946
1947         cur_flist = save_flist;
1948 }
1949 #endif
1950
1951 static void touch_up_dirs(struct file_list *flist, int ndx)
1952 {
1953         static int counter = 0;
1954         struct file_struct *file;
1955         char *fname;
1956         BOOL fix_dir_perms;
1957         int i, start, end;
1958
1959         if (ndx < 0) {
1960                 start = 0;
1961                 end = flist->used - 1;
1962         } else
1963                 start = end = ndx;
1964
1965         /* Fix any directory permissions that were modified during the
1966          * transfer and/or re-set any tweaked modified-time values. */
1967         for (i = start; i <= end; i++, counter++) {
1968                 file = flist->files[i];
1969                 if (!S_ISDIR(file->mode)
1970                  || (!implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1971                         continue;
1972                 if (DEBUG_GTE(TIME, 2)) {
1973                         fname = f_name(file, NULL);
1974                         rprintf(FINFO, "touch_up_dirs: %s (%d)\n",
1975                                 NS(fname), i);
1976                 }
1977                 /* Be sure not to retouch permissions with --fake-super. */
1978                 fix_dir_perms = !am_root && !(file->mode & S_IWUSR);
1979                 if (!F_IS_ACTIVE(file) || file->flags & FLAG_MISSING_DIR
1980                  || !(need_retouch_dir_times || fix_dir_perms))
1981                         continue;
1982                 fname = f_name(file, NULL);
1983                 if (fix_dir_perms)
1984                         do_chmod(fname, file->mode);
1985                 if (need_retouch_dir_times) {
1986                         STRUCT_STAT st;
1987                         if (link_stat(fname, &st, 0) == 0
1988                          && cmp_time(st.st_mtime, file->modtime) != 0)
1989                                 set_modtime(fname, file->modtime, F_MOD_NSEC(file), file->mode);
1990                 }
1991                 if (counter >= loopchk_limit) {
1992                         if (allowed_lull)
1993                                 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
1994                         else
1995                                 maybe_flush_socket(0);
1996                         counter = 0;
1997                 }
1998         }
1999 }
2000
2001 void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
2002 {
2003         struct file_struct *file;
2004         struct file_list *flist;
2005         char fbuf[MAXPATHLEN];
2006         int ndx;
2007
2008         while (1) {
2009 #ifdef SUPPORT_HARD_LINKS
2010                 if (preserve_hard_links && (ndx = get_hlink_num()) != -1) {
2011                         flist = flist_for_ndx(ndx, "check_for_finished_files.1");
2012                         file = flist->files[ndx - flist->ndx_start];
2013                         assert(file->flags & FLAG_HLINKED);
2014                         finish_hard_link(file, f_name(file, fbuf), ndx, NULL, itemizing, code, -1);
2015                         flist->in_progress--;
2016                         continue;
2017                 }
2018 #endif
2019
2020                 if (check_redo && (ndx = get_redo_num()) != -1) {
2021                         csum_length = SUM_LENGTH;
2022                         max_size = -max_size;
2023                         min_size = -min_size;
2024                         ignore_existing = -ignore_existing;
2025                         ignore_non_existing = -ignore_non_existing;
2026                         update_only = -update_only;
2027                         always_checksum = -always_checksum;
2028                         size_only = -size_only;
2029                         append_mode = -append_mode;
2030                         make_backups = -make_backups; /* avoid dup backup w/inplace */
2031                         ignore_times++;
2032
2033                         flist = cur_flist;
2034                         cur_flist = flist_for_ndx(ndx, "check_for_finished_files.2");
2035
2036                         file = cur_flist->files[ndx - cur_flist->ndx_start];
2037                         if (solo_file)
2038                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2039                         else
2040                                 f_name(file, fbuf);
2041                         recv_generator(fbuf, file, ndx, itemizing, code, sock_f_out);
2042                         cur_flist->to_redo--;
2043
2044                         cur_flist = flist;
2045
2046                         csum_length = SHORT_SUM_LENGTH;
2047                         max_size = -max_size;
2048                         min_size = -min_size;
2049                         ignore_existing = -ignore_existing;
2050                         ignore_non_existing = -ignore_non_existing;
2051                         update_only = -update_only;
2052                         always_checksum = -always_checksum;
2053                         size_only = -size_only;
2054                         append_mode = -append_mode;
2055                         make_backups = -make_backups;
2056                         ignore_times--;
2057                         continue;
2058                 }
2059
2060                 if (cur_flist == first_flist)
2061                         break;
2062
2063                 /* We only get here if inc_recurse is enabled. */
2064                 if (first_flist->in_progress || first_flist->to_redo)
2065                         break;
2066
2067                 write_ndx(sock_f_out, NDX_DONE);
2068                 if (!read_batch && !flist_eof) {
2069                         int old_total = 0;
2070                         for (flist = first_flist; flist != cur_flist; flist = flist->next)
2071                                 old_total += flist->used;
2072                         maybe_flush_socket(!flist_eof && file_total - old_total < MIN_FILECNT_LOOKAHEAD/2);
2073                 }
2074
2075                 if (delete_during == 2 || !dir_tweaking) {
2076                         /* Skip directory touch-up. */
2077                 } else if (first_flist->parent_ndx >= 0)
2078                         touch_up_dirs(dir_flist, first_flist->parent_ndx);
2079
2080                 flist_free(first_flist); /* updates first_flist */
2081         }
2082 }
2083
2084 void generate_files(int f_out, const char *local_name)
2085 {
2086         int i, ndx, next_loopchk = 0;
2087         char fbuf[MAXPATHLEN];
2088         int itemizing;
2089         enum logcode code;
2090         int save_info_flist = info_levels[INFO_FLIST];
2091         int save_info_progress = info_levels[INFO_PROGRESS];
2092
2093         if (protocol_version >= 29) {
2094                 itemizing = 1;
2095                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2096                 code = logfile_format_has_i ? FNONE : FLOG;
2097         } else if (am_daemon) {
2098                 itemizing = logfile_format_has_i && do_xfers;
2099                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2100                 code = itemizing || !do_xfers ? FCLIENT : FINFO;
2101         } else if (!am_server) {
2102                 itemizing = stdout_format_has_i;
2103                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2104                 code = itemizing ? FNONE : FINFO;
2105         } else {
2106                 itemizing = 0;
2107                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2108                 code = FINFO;
2109         }
2110         solo_file = local_name;
2111         dir_tweaking = !(list_only || solo_file || dry_run);
2112         need_retouch_dir_times = preserve_times & PRESERVE_DIR_TIMES;
2113         loopchk_limit = allowed_lull ? allowed_lull * 5 : 200;
2114         symlink_timeset_failed_flags = ITEM_REPORT_TIME
2115             | (protocol_version >= 30 || !am_server ? ITEM_REPORT_TIMEFAIL : 0);
2116         implied_dirs_are_missing = relative_paths && !implied_dirs && protocol_version < 30;
2117
2118         if (DEBUG_GTE(GENR, 1))
2119                 rprintf(FINFO, "generator starting pid=%ld\n", (long)getpid());
2120
2121         if (delete_before && !solo_file && cur_flist->used > 0)
2122                 do_delete_pass();
2123         if (delete_during == 2) {
2124                 deldelay_size = BIGPATHBUFLEN * 4;
2125                 deldelay_buf = new_array(char, deldelay_size);
2126                 if (!deldelay_buf)
2127                         out_of_memory("delete-delay");
2128         }
2129         info_levels[INFO_FLIST] = info_levels[INFO_PROGRESS] = 0;
2130
2131         if (append_mode > 0 || whole_file < 0)
2132                 whole_file = 0;
2133         if (DEBUG_GTE(FLIST, 1)) {
2134                 rprintf(FINFO, "delta-transmission %s\n",
2135                         whole_file
2136                         ? "disabled for local transfer or --whole-file"
2137                         : "enabled");
2138         }
2139
2140         dflt_perms = (ACCESSPERMS & ~orig_umask);
2141
2142         do {
2143 #ifdef SUPPORT_HARD_LINKS
2144                 if (preserve_hard_links && inc_recurse) {
2145                         while (!flist_eof && file_total < MIN_FILECNT_LOOKAHEAD/2)
2146                                 wait_for_receiver();
2147                 }
2148 #endif
2149
2150                 if (inc_recurse && cur_flist->parent_ndx >= 0) {
2151                         struct file_struct *fp = dir_flist->files[cur_flist->parent_ndx];
2152                         if (solo_file)
2153                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2154                         else
2155                                 f_name(fp, fbuf);
2156                         ndx = cur_flist->ndx_start - 1;
2157                         recv_generator(fbuf, fp, ndx, itemizing, code, f_out);
2158                         if (delete_during && dry_run < 2 && !list_only
2159                          && !(fp->flags & FLAG_MISSING_DIR)) {
2160                                 if (fp->flags & FLAG_CONTENT_DIR) {
2161                                         dev_t dirdev;
2162                                         if (one_file_system) {
2163                                                 uint32 *devp = F_DIR_DEV_P(fp);
2164                                                 dirdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
2165                                         } else
2166                                                 dirdev = MAKEDEV(0, 0);
2167                                         delete_in_dir(fbuf, fp, &dirdev);
2168                                 } else
2169                                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(fp));
2170                         }
2171                 }
2172                 for (i = cur_flist->low; i <= cur_flist->high; i++) {
2173                         struct file_struct *file = cur_flist->sorted[i];
2174
2175                         if (!F_IS_ACTIVE(file))
2176                                 continue;
2177
2178                         if (unsort_ndx)
2179                                 ndx = F_NDX(file);
2180                         else
2181                                 ndx = i + cur_flist->ndx_start;
2182
2183                         if (solo_file)
2184                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2185                         else
2186                                 f_name(file, fbuf);
2187                         recv_generator(fbuf, file, ndx, itemizing, code, f_out);
2188
2189                         check_for_finished_files(itemizing, code, 0);
2190
2191                         if (i + cur_flist->ndx_start >= next_loopchk) {
2192                                 if (allowed_lull)
2193                                         maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
2194                                 else
2195                                         maybe_flush_socket(0);
2196                                 next_loopchk += loopchk_limit;
2197                         }
2198                 }
2199
2200                 if (!inc_recurse) {
2201                         write_ndx(f_out, NDX_DONE);
2202                         break;
2203                 }
2204
2205                 while (1) {
2206                         check_for_finished_files(itemizing, code, 1);
2207                         if (cur_flist->next || flist_eof)
2208                                 break;
2209                         wait_for_receiver();
2210                 }
2211         } while ((cur_flist = cur_flist->next) != NULL);
2212
2213         if (delete_during)
2214                 delete_in_dir(NULL, NULL, &dev_zero);
2215         phase++;
2216         if (DEBUG_GTE(GENR, 1))
2217                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2218
2219         while (1) {
2220                 check_for_finished_files(itemizing, code, 1);
2221                 if (msgdone_cnt)
2222                         break;
2223                 wait_for_receiver();
2224         }
2225
2226         phase++;
2227         if (DEBUG_GTE(GENR, 1))
2228                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2229
2230         write_ndx(f_out, NDX_DONE);
2231
2232         /* Reduce round-trip lag-time for a useless delay-updates phase. */
2233         if (protocol_version >= 29 && EARLY_DELAY_DONE_MSG())
2234                 write_ndx(f_out, NDX_DONE);
2235
2236         if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG()) {
2237                 if ((INFO_GTE(STATS, 2) && (delete_mode || force_delete)) || read_batch)
2238                         write_del_stats(f_out);
2239                 if (EARLY_DELAY_DONE_MSG()) /* Can't send this before delay */
2240                         write_ndx(f_out, NDX_DONE);
2241         }
2242
2243         /* Read MSG_DONE for the redo phase (and any prior messages). */
2244         while (1) {
2245                 check_for_finished_files(itemizing, code, 0);
2246                 if (msgdone_cnt > 1)
2247                         break;
2248                 wait_for_receiver();
2249         }
2250
2251         if (protocol_version >= 29) {
2252                 phase++;
2253                 if (DEBUG_GTE(GENR, 1))
2254                         rprintf(FINFO, "generate_files phase=%d\n", phase);
2255                 if (!EARLY_DELAY_DONE_MSG()) {
2256                         write_ndx(f_out, NDX_DONE);
2257                         if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG())
2258                                 write_ndx(f_out, NDX_DONE);
2259                 }
2260                 /* Read MSG_DONE for delay-updates phase & prior messages. */
2261                 while (msgdone_cnt == 2)
2262                         wait_for_receiver();
2263         }
2264
2265         info_levels[INFO_FLIST] = save_info_flist;
2266         info_levels[INFO_PROGRESS] = save_info_progress;
2267
2268         if (delete_during == 2)
2269                 do_delayed_deletions(fbuf);
2270         if (delete_after && !solo_file && file_total > 0)
2271                 do_delete_pass();
2272
2273         if (max_delete >= 0 && skipped_deletes) {
2274                 rprintf(FWARNING,
2275                         "Deletions stopped due to --max-delete limit (%d skipped)\n",
2276                         skipped_deletes);
2277                 io_error |= IOERR_DEL_LIMIT;
2278         }
2279
2280         if (protocol_version >= 31) {
2281                 if (!EARLY_DELETE_DONE_MSG()) {
2282                         if (INFO_GTE(STATS, 2) || read_batch)
2283                                 write_del_stats(f_out);
2284                         write_ndx(f_out, NDX_DONE);
2285                 }
2286
2287                 /* Read MSG_DONE for late-delete phase & prior messages. */
2288                 while (msgdone_cnt == 3)
2289                         wait_for_receiver();
2290         }
2291
2292         if ((need_retouch_dir_perms || need_retouch_dir_times)
2293          && dir_tweaking && (!inc_recurse || delete_during == 2))
2294                 touch_up_dirs(dir_flist, -1);
2295
2296         if (DEBUG_GTE(GENR, 1))
2297                 rprintf(FINFO, "generate_files finished\n");
2298 }