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