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         fnamecmp = fname;
1286
1287         if (is_dir) {
1288                 mode_t added_perms;
1289                 if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
1290                         goto cleanup;
1291                 if (am_root < 0) {
1292                         /* For --fake-super, the dir must be useable by the copying
1293                          * user, just like it would be for root. */
1294                         added_perms = S_IRUSR|S_IWUSR|S_IXUSR;
1295                 } else
1296                         added_perms = 0;
1297                 if (is_dir < 0) {
1298                         /* In inc_recurse mode we want to make sure any missing
1299                          * directories get created while we're still processing
1300                          * the parent dir (which allows us to touch the parent
1301                          * dir's mtime right away).  We will handle the dir in
1302                          * full later (right before we handle its contents). */
1303                         if (statret == 0
1304                          && (S_ISDIR(sx.st.st_mode)
1305                           || delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0))
1306                                 goto cleanup; /* Any errors get reported later. */
1307                         if (do_mkdir(fname, (file->mode|added_perms) & 0700) == 0)
1308                                 file->flags |= FLAG_DIR_CREATED;
1309                         goto cleanup;
1310                 }
1311                 /* The file to be received is a directory, so we need
1312                  * to prepare appropriately.  If there is already a
1313                  * file of that name and it is *not* a directory, then
1314                  * we need to delete it.  If it doesn't exist, then
1315                  * (perhaps recursively) create it. */
1316                 if (statret == 0 && !S_ISDIR(sx.st.st_mode)) {
1317                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0)
1318                                 goto skipping_dir_contents;
1319                         statret = -1;
1320                 }
1321                 if (dry_run && statret != 0) {
1322                         if (!dry_missing_dir)
1323                                 dry_missing_dir = file;
1324                         file->flags |= FLAG_MISSING_DIR;
1325                 }
1326                 real_ret = statret;
1327                 real_sx = sx;
1328                 if (file->flags & FLAG_DIR_CREATED)
1329                         statret = -1;
1330                 if (!preserve_perms) { /* See comment in non-dir code below. */
1331                         file->mode = dest_mode(file->mode, sx.st.st_mode,
1332                                                dflt_perms, statret == 0);
1333                 }
1334                 if (statret != 0 && basis_dir[0] != NULL) {
1335                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1336                                               itemizing, code);
1337                         if (j == -2) {
1338                                 itemizing = 0;
1339                                 code = FNONE;
1340                                 statret = 1;
1341                         } else if (j >= 0) {
1342                                 statret = 1;
1343                                 fnamecmp = fnamecmpbuf;
1344                         }
1345                 }
1346                 if (itemizing && f_out != -1) {
1347                         itemize(fnamecmp, file, ndx, statret, &sx,
1348                                 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
1349                 }
1350                 if (real_ret != 0 && do_mkdir(fname,file->mode|added_perms) < 0 && errno != EEXIST) {
1351                         if (!relative_paths || errno != ENOENT
1352                          || make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0
1353                          || (do_mkdir(fname, file->mode|added_perms) < 0 && errno != EEXIST)) {
1354                                 rsyserr(FERROR_XFER, errno,
1355                                         "recv_generator: mkdir %s failed",
1356                                         full_fname(fname));
1357                           skipping_dir_contents:
1358                                 rprintf(FERROR,
1359                                     "*** Skipping any contents from this failed directory ***\n");
1360                                 skip_dir = file;
1361                                 file->flags |= FLAG_MISSING_DIR;
1362                                 goto cleanup;
1363                         }
1364                 }
1365 #ifdef SUPPORT_XATTRS
1366                 if (preserve_xattrs && statret == 1)
1367                         copy_xattrs(fnamecmpbuf, fname);
1368 #endif
1369                 if (set_file_attrs(fname, file, real_ret ? NULL : &real_sx, NULL, 0)
1370                     && INFO_GTE(NAME, 1) && code != FNONE && f_out != -1)
1371                         rprintf(code, "%s/\n", fname);
1372
1373                 /* We need to ensure that the dirs in the transfer have writable
1374                  * permissions during the time we are putting files within them.
1375                  * This is then fixed after the transfer is done. */
1376 #ifdef HAVE_CHMOD
1377                 if (!am_root && !(file->mode & S_IWUSR) && dir_tweaking) {
1378                         mode_t mode = file->mode | S_IWUSR;
1379                         if (do_chmod(fname, mode) < 0) {
1380                                 rsyserr(FERROR_XFER, errno,
1381                                         "failed to modify permissions on %s",
1382                                         full_fname(fname));
1383                         }
1384                         need_retouch_dir_perms = 1;
1385                 }
1386 #endif
1387
1388                 if (real_ret != 0 && one_file_system)
1389                         real_sx.st.st_dev = filesystem_dev;
1390                 if (inc_recurse) {
1391                         if (one_file_system) {
1392                                 uint32 *devp = F_DIR_DEV_P(file);
1393                                 DEV_MAJOR(devp) = major(real_sx.st.st_dev);
1394                                 DEV_MINOR(devp) = minor(real_sx.st.st_dev);
1395                         }
1396                 }
1397                 else if (delete_during && f_out != -1 && !phase
1398                     && !(file->flags & FLAG_MISSING_DIR)) {
1399                         if (file->flags & FLAG_CONTENT_DIR)
1400                                 delete_in_dir(fname, file, &real_sx.st.st_dev);
1401                         else
1402                                 change_local_filter_dir(fname, strlen(fname), F_DEPTH(file));
1403                 }
1404                 goto cleanup;
1405         }
1406
1407         /* If we're not preserving permissions, change the file-list's
1408          * mode based on the local permissions and some heuristics. */
1409         if (!preserve_perms) {
1410                 int exists = statret == 0 && !S_ISDIR(sx.st.st_mode);
1411                 file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms,
1412                                        exists);
1413         }
1414
1415 #ifdef SUPPORT_HARD_LINKS
1416         if (preserve_hard_links && F_HLINK_NOT_FIRST(file)
1417          && hard_link_check(file, ndx, fname, statret, &sx, itemizing, code))
1418                 goto cleanup;
1419 #endif
1420
1421         if (preserve_links && S_ISLNK(file->mode)) {
1422 #ifdef SUPPORT_LINKS
1423                 const char *sl = F_SYMLINK(file);
1424                 if (safe_symlinks && unsafe_symlink(sl, fname)) {
1425                         if (INFO_GTE(NAME, 1)) {
1426                                 if (solo_file) {
1427                                         /* fname contains the destination path, but we
1428                                          * want to report the source path. */
1429                                         fname = f_name(file, NULL);
1430                                 }
1431                                 rprintf(FINFO,
1432                                         "ignoring unsafe symlink \"%s\" -> \"%s\"\n",
1433                                         fname, sl);
1434                         }
1435                         return;
1436                 }
1437                 if (statret == 0) {
1438                         char lnk[MAXPATHLEN];
1439                         int len;
1440
1441                         if (S_ISLNK(sx.st.st_mode)
1442                          && (len = do_readlink(fname, lnk, MAXPATHLEN-1)) > 0
1443                          && strncmp(lnk, sl, len) == 0 && sl[len] == '\0') {
1444                                 /* The link is pointing to the right place. */
1445                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1446                                 if (itemizing)
1447                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1448 #if defined SUPPORT_HARD_LINKS && defined CAN_HARDLINK_SYMLINK
1449                                 if (preserve_hard_links && F_IS_HLINKED(file))
1450                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1451 #endif
1452                                 if (remove_source_files == 1)
1453                                         goto return_with_success;
1454                                 goto cleanup;
1455                         }
1456                 } else if (basis_dir[0] != NULL) {
1457                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1458                                               itemizing, code);
1459                         if (j == -2) {
1460 #ifndef CAN_HARDLINK_SYMLINK
1461                                 if (link_dest) {
1462                                         /* Resort to --copy-dest behavior. */
1463                                 } else
1464 #endif
1465                                 if (!copy_dest)
1466                                         goto cleanup;
1467                                 itemizing = 0;
1468                                 code = FNONE;
1469                         } else if (j >= 0)
1470                                 statret = 1;
1471                 }
1472                 if (atomic_create(file, fname, sl, MAKEDEV(0, 0), &sx, statret == 0 ? DEL_FOR_SYMLINK : 0)) {
1473                         set_file_attrs(fname, file, NULL, NULL, 0);
1474                         if (itemizing) {
1475                                 if (statret == 0 && !S_ISLNK(sx.st.st_mode))
1476                                         statret = -1;
1477                                 itemize(fname, file, ndx, statret, &sx,
1478                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1479                         }
1480                         if (code != FNONE && INFO_GTE(NAME, 1))
1481                                 rprintf(code, "%s -> %s\n", fname, sl);
1482 #ifdef SUPPORT_HARD_LINKS
1483                         if (preserve_hard_links && F_IS_HLINKED(file))
1484                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1485 #endif
1486                         /* This does not check remove_source_files == 1
1487                          * because this is one of the items that the old
1488                          * --remove-sent-files option would remove. */
1489                         if (remove_source_files)
1490                                 goto return_with_success;
1491                 }
1492 #endif
1493                 goto cleanup;
1494         }
1495
1496         if ((am_root && preserve_devices && IS_DEVICE(file->mode))
1497          || (preserve_specials && IS_SPECIAL(file->mode))) {
1498                 dev_t rdev;
1499                 int del_for_flag = 0;
1500                 if (IS_DEVICE(file->mode)) {
1501                         uint32 *devp = F_RDEV_P(file);
1502                         rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
1503                 } else
1504                         rdev = 0;
1505                 if (statret == 0) {
1506                         if (IS_DEVICE(file->mode)) {
1507                                 if (!IS_DEVICE(sx.st.st_mode))
1508                                         statret = -1;
1509                                 del_for_flag = DEL_FOR_DEVICE;
1510                         } else {
1511                                 if (!IS_SPECIAL(sx.st.st_mode))
1512                                         statret = -1;
1513                                 del_for_flag = DEL_FOR_SPECIAL;
1514                         }
1515                         if (statret == 0
1516                          && BITS_EQUAL(sx.st.st_mode, file->mode, _S_IFMT)
1517                          && (IS_SPECIAL(sx.st.st_mode) || sx.st.st_rdev == rdev)) {
1518                                 /* The device or special file is identical. */
1519                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1520                                 if (itemizing)
1521                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1522 #ifdef SUPPORT_HARD_LINKS
1523                                 if (preserve_hard_links && F_IS_HLINKED(file))
1524                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1525 #endif
1526                                 if (remove_source_files == 1)
1527                                         goto return_with_success;
1528                                 goto cleanup;
1529                         }
1530                 } else if (basis_dir[0] != NULL) {
1531                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1532                                               itemizing, code);
1533                         if (j == -2) {
1534 #ifndef CAN_HARDLINK_SPECIAL
1535                                 if (link_dest) {
1536                                         /* Resort to --copy-dest behavior. */
1537                                 } else
1538 #endif
1539                                 if (!copy_dest)
1540                                         goto cleanup;
1541                                 itemizing = 0;
1542                                 code = FNONE;
1543                         } else if (j >= 0)
1544                                 statret = 1;
1545                 }
1546                 if (DEBUG_GTE(GENR, 1)) {
1547                         rprintf(FINFO, "mknod(%s, 0%o, [%ld,%ld])\n",
1548                                 fname, (int)file->mode,
1549                                 (long)major(rdev), (long)minor(rdev));
1550                 }
1551                 if (atomic_create(file, fname, NULL, rdev, &sx, del_for_flag)) {
1552                         set_file_attrs(fname, file, NULL, NULL, 0);
1553                         if (itemizing) {
1554                                 itemize(fname, file, ndx, statret, &sx,
1555                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1556                         }
1557                         if (code != FNONE && INFO_GTE(NAME, 1))
1558                                 rprintf(code, "%s\n", fname);
1559 #ifdef SUPPORT_HARD_LINKS
1560                         if (preserve_hard_links && F_IS_HLINKED(file))
1561                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1562 #endif
1563                         if (remove_source_files == 1)
1564                                 goto return_with_success;
1565                 }
1566                 goto cleanup;
1567         }
1568
1569         if (!S_ISREG(file->mode)) {
1570                 if (solo_file)
1571                         fname = f_name(file, NULL);
1572                 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1573                 goto cleanup;
1574         }
1575
1576         if (max_size > 0 && F_LENGTH(file) > max_size) {
1577                 if (INFO_GTE(SKIP, 1)) {
1578                         if (solo_file)
1579                                 fname = f_name(file, NULL);
1580                         rprintf(FINFO, "%s is over max-size\n", fname);
1581                 }
1582                 goto cleanup;
1583         }
1584         if (min_size > 0 && F_LENGTH(file) < min_size) {
1585                 if (INFO_GTE(SKIP, 1)) {
1586                         if (solo_file)
1587                                 fname = f_name(file, NULL);
1588                         rprintf(FINFO, "%s is under min-size\n", fname);
1589                 }
1590                 goto cleanup;
1591         }
1592
1593         if (update_only > 0 && statret == 0
1594             && cmp_time(sx.st.st_mtime, file->modtime) > 0) {
1595                 if (INFO_GTE(SKIP, 1))
1596                         rprintf(FINFO, "%s is newer\n", fname);
1597 #ifdef SUPPORT_HARD_LINKS
1598                 if (F_IS_HLINKED(file))
1599                         handle_skipped_hlink(file, itemizing, code, f_out);
1600 #endif
1601                 goto cleanup;
1602         }
1603
1604         fnamecmp_type = FNAMECMP_FNAME;
1605
1606         if (statret == 0 && !S_ISREG(sx.st.st_mode)) {
1607                 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_FILE) != 0)
1608                         goto cleanup;
1609                 statret = -1;
1610                 stat_errno = ENOENT;
1611         }
1612
1613         if (statret != 0 && basis_dir[0] != NULL) {
1614                 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &sx,
1615                                       itemizing, code);
1616                 if (j == -2) {
1617                         if (remove_source_files == 1)
1618                                 goto return_with_success;
1619                         goto cleanup;
1620                 }
1621                 if (j >= 0) {
1622                         fnamecmp = fnamecmpbuf;
1623                         fnamecmp_type = j;
1624                         statret = 0;
1625                 }
1626         }
1627
1628         real_ret = statret;
1629         real_sx = sx;
1630
1631         if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1632             && link_stat(partialptr, &partial_st, 0) == 0
1633             && S_ISREG(partial_st.st_mode)) {
1634                 if (statret != 0)
1635                         goto prepare_to_open;
1636         } else
1637                 partialptr = NULL;
1638
1639         if (statret != 0 && fuzzy_dirlist) {
1640                 int j = find_fuzzy(file, fuzzy_dirlist);
1641                 if (j >= 0) {
1642                         fuzzy_file = fuzzy_dirlist->files[j];
1643                         f_name(fuzzy_file, fnamecmpbuf);
1644                         if (DEBUG_GTE(FUZZY, 1)) {
1645                                 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1646                                         fname, fnamecmpbuf);
1647                         }
1648                         sx.st.st_size = F_LENGTH(fuzzy_file);
1649                         statret = 0;
1650                         fnamecmp = fnamecmpbuf;
1651                         fnamecmp_type = FNAMECMP_FUZZY;
1652                 }
1653         }
1654
1655         if (statret != 0) {
1656 #ifdef SUPPORT_HARD_LINKS
1657                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1658                         cur_flist->in_progress++;
1659                         goto cleanup;
1660                 }
1661 #endif
1662                 if (stat_errno == ENOENT)
1663                         goto notify_others;
1664                 rsyserr(FERROR_XFER, stat_errno, "recv_generator: failed to stat %s",
1665                         full_fname(fname));
1666                 goto cleanup;
1667         }
1668
1669         if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1670                 ;
1671         else if (fnamecmp_type == FNAMECMP_FUZZY)
1672                 ;
1673         else if (unchanged_file(fnamecmp, file, &sx.st)) {
1674                 if (partialptr) {
1675                         do_unlink(partialptr);
1676                         handle_partial_dir(partialptr, PDIR_DELETE);
1677                 }
1678                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1679                 if (itemizing)
1680                         itemize(fnamecmp, file, ndx, statret, &sx, 0, 0, NULL);
1681 #ifdef SUPPORT_HARD_LINKS
1682                 if (preserve_hard_links && F_IS_HLINKED(file))
1683                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1684 #endif
1685                 if (remove_source_files != 1)
1686                         goto cleanup;
1687           return_with_success:
1688                 if (!dry_run)
1689                         send_msg_int(MSG_SUCCESS, ndx);
1690                 goto cleanup;
1691         }
1692
1693         if (append_mode > 0 && sx.st.st_size >= F_LENGTH(file)) {
1694 #ifdef SUPPORT_HARD_LINKS
1695                 if (F_IS_HLINKED(file))
1696                         handle_skipped_hlink(file, itemizing, code, f_out);
1697 #endif
1698                 goto cleanup;
1699         }
1700
1701   prepare_to_open:
1702         if (partialptr) {
1703                 sx.st = partial_st;
1704                 fnamecmp = partialptr;
1705                 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1706                 statret = 0;
1707         }
1708
1709         if (!do_xfers)
1710                 goto notify_others;
1711
1712         if (read_batch || whole_file) {
1713                 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1714                         if (!(backupptr = get_backup_name(fname)))
1715                                 goto cleanup;
1716                         if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
1717                                 goto pretend_missing;
1718                         if (copy_file(fname, backupptr, -1, back_file->mode) < 0) {
1719                                 unmake_file(back_file);
1720                                 back_file = NULL;
1721                                 goto cleanup;
1722                         }
1723                 }
1724                 goto notify_others;
1725         }
1726
1727         if (fuzzy_dirlist) {
1728                 int j = flist_find(fuzzy_dirlist, file);
1729                 if (j >= 0) /* don't use changing file as future fuzzy basis */
1730                         fuzzy_dirlist->files[j]->flags |= FLAG_FILE_SENT;
1731         }
1732
1733         /* open the file */
1734         if ((fd = do_open(fnamecmp, O_RDONLY, 0)) < 0) {
1735                 rsyserr(FERROR, errno, "failed to open %s, continuing",
1736                         full_fname(fnamecmp));
1737           pretend_missing:
1738                 /* pretend the file didn't exist */
1739 #ifdef SUPPORT_HARD_LINKS
1740                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1741                         cur_flist->in_progress++;
1742                         goto cleanup;
1743                 }
1744 #endif
1745                 statret = real_ret = -1;
1746                 goto notify_others;
1747         }
1748
1749         if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1750                 if (!(backupptr = get_backup_name(fname))) {
1751                         close(fd);
1752                         goto cleanup;
1753                 }
1754                 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1755                         close(fd);
1756                         goto pretend_missing;
1757                 }
1758                 if (robust_unlink(backupptr) && errno != ENOENT) {
1759                         rsyserr(FERROR_XFER, errno, "unlink %s",
1760                                 full_fname(backupptr));
1761                         unmake_file(back_file);
1762                         back_file = NULL;
1763                         close(fd);
1764                         goto cleanup;
1765                 }
1766                 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1767                         rsyserr(FERROR_XFER, errno, "open %s", full_fname(backupptr));
1768                         unmake_file(back_file);
1769                         back_file = NULL;
1770                         close(fd);
1771                         goto cleanup;
1772                 }
1773                 fnamecmp_type = FNAMECMP_BACKUP;
1774         }
1775
1776         if (DEBUG_GTE(DELTASUM, 3)) {
1777                 rprintf(FINFO, "gen mapped %s of size %s\n",
1778                         fnamecmp, big_num(sx.st.st_size));
1779         }
1780
1781         if (DEBUG_GTE(DELTASUM, 2))
1782                 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1783
1784   notify_others:
1785         if (remove_source_files && !delay_updates && !phase && !dry_run)
1786                 increment_active_files(ndx, itemizing, code);
1787         if (inc_recurse && !dry_run)
1788                 cur_flist->in_progress++;
1789 #ifdef SUPPORT_HARD_LINKS
1790         if (preserve_hard_links && F_IS_HLINKED(file))
1791                 file->flags |= FLAG_FILE_SENT;
1792 #endif
1793         write_ndx(f_out, ndx);
1794         if (itemizing) {
1795                 int iflags = ITEM_TRANSFER;
1796                 if (always_checksum > 0)
1797                         iflags |= ITEM_REPORT_CHANGE;
1798                 if (fnamecmp_type != FNAMECMP_FNAME)
1799                         iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1800                 if (fnamecmp_type == FNAMECMP_FUZZY)
1801                         iflags |= ITEM_XNAME_FOLLOWS;
1802                 itemize(fnamecmp, file, -1, real_ret, &real_sx, iflags, fnamecmp_type,
1803                         fuzzy_file ? fuzzy_file->basename : NULL);
1804 #ifdef SUPPORT_ACLS
1805                 if (preserve_acls)
1806                         free_acl(&real_sx);
1807 #endif
1808 #ifdef SUPPORT_XATTRS
1809                 if (preserve_xattrs)
1810                         free_xattr(&real_sx);
1811 #endif
1812         }
1813
1814         if (!do_xfers) {
1815 #ifdef SUPPORT_HARD_LINKS
1816                 if (preserve_hard_links && F_IS_HLINKED(file))
1817                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1818 #endif
1819                 goto cleanup;
1820         }
1821         if (read_batch)
1822                 goto cleanup;
1823
1824         if (statret != 0 || whole_file)
1825                 write_sum_head(f_out, NULL);
1826         else if (sx.st.st_size <= 0) {
1827                 write_sum_head(f_out, NULL);
1828                 close(fd);
1829         } else {
1830                 if (generate_and_send_sums(fd, sx.st.st_size, f_out, f_copy) < 0) {
1831                         rprintf(FWARNING,
1832                             "WARNING: file is too large for checksum sending: %s\n",
1833                             fnamecmp);
1834                         write_sum_head(f_out, NULL);
1835                 }
1836                 close(fd);
1837         }
1838
1839   cleanup:
1840         if (back_file) {
1841                 int save_preserve_xattrs = preserve_xattrs;
1842                 if (f_copy >= 0)
1843                         close(f_copy);
1844 #ifdef SUPPORT_XATTRS
1845                 if (preserve_xattrs) {
1846                         copy_xattrs(fname, backupptr);
1847                         preserve_xattrs = 0;
1848                 }
1849 #endif
1850                 set_file_attrs(backupptr, back_file, NULL, NULL, 0);
1851                 preserve_xattrs = save_preserve_xattrs;
1852                 if (INFO_GTE(BACKUP, 1)) {
1853                         rprintf(FINFO, "backed up %s to %s\n",
1854                                 fname, backupptr);
1855                 }
1856                 unmake_file(back_file);
1857         }
1858
1859 #ifdef SUPPORT_ACLS
1860         if (preserve_acls)
1861                 free_acl(&sx);
1862 #endif
1863 #ifdef SUPPORT_XATTRS
1864         if (preserve_xattrs)
1865                 free_xattr(&sx);
1866 #endif
1867         return;
1868 }
1869
1870 /* If we are replacing an existing hard link, symlink, device, or special file,
1871  * create a temp-name item and rename it into place.  Only a symlink or hard
1872  * link puts a non-NULL value into the lnk arg.  Only a device puts a non-0
1873  * value into the rdev arg.  Specify 0 for the del_for_flag if there is not a
1874  * file to replace.  This returns 1 on success and 0 on failure. */
1875 int atomic_create(struct file_struct *file, char *fname, const char *lnk,
1876                   dev_t rdev, stat_x *sxp, int del_for_flag)
1877 {
1878         char tmpname[MAXPATHLEN];
1879         const char *create_name;
1880         int skip_atomic, dir_in_the_way = del_for_flag && S_ISDIR(sxp->st.st_mode);
1881
1882         if (!del_for_flag || dir_in_the_way || tmpdir || !get_tmpname(tmpname, fname, True))
1883                 skip_atomic = 1;
1884         else
1885                 skip_atomic = 0;
1886
1887         if (del_for_flag) {
1888                 if (make_backups > 0 && !dir_in_the_way) {
1889                         if (!make_backup(fname, skip_atomic))
1890                                 return 0;
1891                 } else if (skip_atomic) {
1892                         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1893                         if (delete_item(fname, sxp->st.st_mode, del_opts | del_for_flag) != 0)
1894                                 return 0;
1895                 }
1896         }
1897
1898         create_name = skip_atomic ? fname : tmpname;
1899
1900         if (lnk) {
1901 #ifdef SUPPORT_LINKS
1902                 if (S_ISLNK(file->mode)
1903 #ifdef SUPPORT_HARD_LINKS /* The first symlink in a hard-linked cluster is always created. */
1904                  && (!F_IS_HLINKED(file) || file->flags & FLAG_HLINK_FIRST)
1905 #endif
1906                  ) {
1907                         if (do_symlink(lnk, create_name) < 0) {
1908                                 rsyserr(FERROR_XFER, errno, "symlink %s -> \"%s\" failed",
1909                                         full_fname(create_name), lnk);
1910                                 return 0;
1911                         }
1912                 } else
1913 #endif
1914 #ifdef SUPPORT_HARD_LINKS
1915                 if (!hard_link_one(file, create_name, lnk, 0))
1916                         return 0;
1917 #endif
1918         } else {
1919                 if (do_mknod(create_name, file->mode, rdev) < 0) {
1920                         rsyserr(FERROR_XFER, errno, "mknod %s failed",
1921                                 full_fname(create_name));
1922                         return 0;
1923                 }
1924         }
1925
1926         if (!skip_atomic) {
1927                 if (do_rename(tmpname, fname) < 0) {
1928                         rsyserr(FERROR_XFER, errno, "rename %s -> \"%s\" failed",
1929                                 full_fname(tmpname), full_fname(fname));
1930                         do_unlink(tmpname);
1931                         return 0;
1932                 }
1933         }
1934
1935         return 1;
1936 }
1937
1938 #ifdef SUPPORT_HARD_LINKS
1939 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
1940                                  enum logcode code, int f_out)
1941 {
1942         char fbuf[MAXPATHLEN];
1943         int new_last_ndx;
1944         struct file_list *save_flist = cur_flist;
1945
1946         /* If we skip the last item in a chain of links and there was a
1947          * prior non-skipped hard-link waiting to finish, finish it now. */
1948         if ((new_last_ndx = skip_hard_link(file, &cur_flist)) < 0)
1949                 return;
1950
1951         file = cur_flist->files[new_last_ndx - cur_flist->ndx_start];
1952         cur_flist->in_progress--; /* undo prior increment */
1953         f_name(file, fbuf);
1954         recv_generator(fbuf, file, new_last_ndx, itemizing, code, f_out);
1955
1956         cur_flist = save_flist;
1957 }
1958 #endif
1959
1960 static void touch_up_dirs(struct file_list *flist, int ndx)
1961 {
1962         static int counter = 0;
1963         struct file_struct *file;
1964         char *fname;
1965         BOOL fix_dir_perms;
1966         int i, start, end;
1967
1968         if (ndx < 0) {
1969                 start = 0;
1970                 end = flist->used - 1;
1971         } else
1972                 start = end = ndx;
1973
1974         /* Fix any directory permissions that were modified during the
1975          * transfer and/or re-set any tweaked modified-time values. */
1976         for (i = start; i <= end; i++, counter++) {
1977                 file = flist->files[i];
1978                 if (!S_ISDIR(file->mode)
1979                  || (!implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1980                         continue;
1981                 if (DEBUG_GTE(TIME, 2)) {
1982                         fname = f_name(file, NULL);
1983                         rprintf(FINFO, "touch_up_dirs: %s (%d)\n",
1984                                 NS(fname), i);
1985                 }
1986                 /* Be sure not to retouch permissions with --fake-super. */
1987                 fix_dir_perms = !am_root && !(file->mode & S_IWUSR);
1988                 if (!F_IS_ACTIVE(file) || file->flags & FLAG_MISSING_DIR
1989                  || !(need_retouch_dir_times || fix_dir_perms))
1990                         continue;
1991                 fname = f_name(file, NULL);
1992                 if (fix_dir_perms)
1993                         do_chmod(fname, file->mode);
1994                 if (need_retouch_dir_times) {
1995                         STRUCT_STAT st;
1996                         if (link_stat(fname, &st, 0) == 0
1997                          && cmp_time(st.st_mtime, file->modtime) != 0)
1998                                 set_modtime(fname, file->modtime, F_MOD_NSEC(file), file->mode);
1999                 }
2000                 if (counter >= loopchk_limit) {
2001                         if (allowed_lull)
2002                                 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
2003                         else
2004                                 maybe_flush_socket(0);
2005                         counter = 0;
2006                 }
2007         }
2008 }
2009
2010 void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
2011 {
2012         struct file_struct *file;
2013         struct file_list *flist;
2014         char fbuf[MAXPATHLEN];
2015         int ndx;
2016
2017         while (1) {
2018 #ifdef SUPPORT_HARD_LINKS
2019                 if (preserve_hard_links && (ndx = get_hlink_num()) != -1) {
2020                         flist = flist_for_ndx(ndx, "check_for_finished_files.1");
2021                         file = flist->files[ndx - flist->ndx_start];
2022                         assert(file->flags & FLAG_HLINKED);
2023                         finish_hard_link(file, f_name(file, fbuf), ndx, NULL, itemizing, code, -1);
2024                         flist->in_progress--;
2025                         continue;
2026                 }
2027 #endif
2028
2029                 if (check_redo && (ndx = get_redo_num()) != -1) {
2030                         csum_length = SUM_LENGTH;
2031                         max_size = -max_size;
2032                         min_size = -min_size;
2033                         ignore_existing = -ignore_existing;
2034                         ignore_non_existing = -ignore_non_existing;
2035                         update_only = -update_only;
2036                         always_checksum = -always_checksum;
2037                         size_only = -size_only;
2038                         append_mode = -append_mode;
2039                         make_backups = -make_backups; /* avoid dup backup w/inplace */
2040                         ignore_times++;
2041
2042                         flist = cur_flist;
2043                         cur_flist = flist_for_ndx(ndx, "check_for_finished_files.2");
2044
2045                         file = cur_flist->files[ndx - cur_flist->ndx_start];
2046                         if (solo_file)
2047                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2048                         else
2049                                 f_name(file, fbuf);
2050                         recv_generator(fbuf, file, ndx, itemizing, code, sock_f_out);
2051                         cur_flist->to_redo--;
2052
2053                         cur_flist = flist;
2054
2055                         csum_length = SHORT_SUM_LENGTH;
2056                         max_size = -max_size;
2057                         min_size = -min_size;
2058                         ignore_existing = -ignore_existing;
2059                         ignore_non_existing = -ignore_non_existing;
2060                         update_only = -update_only;
2061                         always_checksum = -always_checksum;
2062                         size_only = -size_only;
2063                         append_mode = -append_mode;
2064                         make_backups = -make_backups;
2065                         ignore_times--;
2066                         continue;
2067                 }
2068
2069                 if (cur_flist == first_flist)
2070                         break;
2071
2072                 /* We only get here if inc_recurse is enabled. */
2073                 if (first_flist->in_progress || first_flist->to_redo)
2074                         break;
2075
2076                 write_ndx(sock_f_out, NDX_DONE);
2077                 if (!read_batch && !flist_eof) {
2078                         int old_total = 0;
2079                         for (flist = first_flist; flist != cur_flist; flist = flist->next)
2080                                 old_total += flist->used;
2081                         maybe_flush_socket(!flist_eof && file_total - old_total < MIN_FILECNT_LOOKAHEAD/2);
2082                 }
2083
2084                 if (delete_during == 2 || !dir_tweaking) {
2085                         /* Skip directory touch-up. */
2086                 } else if (first_flist->parent_ndx >= 0)
2087                         touch_up_dirs(dir_flist, first_flist->parent_ndx);
2088
2089                 flist_free(first_flist); /* updates first_flist */
2090         }
2091 }
2092
2093 void generate_files(int f_out, const char *local_name)
2094 {
2095         int i, ndx, next_loopchk = 0;
2096         char fbuf[MAXPATHLEN];
2097         int itemizing;
2098         enum logcode code;
2099         int save_info_flist = info_levels[INFO_FLIST];
2100         int save_info_progress = info_levels[INFO_PROGRESS];
2101
2102         if (protocol_version >= 29) {
2103                 itemizing = 1;
2104                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2105                 code = logfile_format_has_i ? FNONE : FLOG;
2106         } else if (am_daemon) {
2107                 itemizing = logfile_format_has_i && do_xfers;
2108                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2109                 code = itemizing || !do_xfers ? FCLIENT : FINFO;
2110         } else if (!am_server) {
2111                 itemizing = stdout_format_has_i;
2112                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2113                 code = itemizing ? FNONE : FINFO;
2114         } else {
2115                 itemizing = 0;
2116                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2117                 code = FINFO;
2118         }
2119         solo_file = local_name;
2120         dir_tweaking = !(list_only || solo_file || dry_run);
2121         need_retouch_dir_times = preserve_times & PRESERVE_DIR_TIMES;
2122         loopchk_limit = allowed_lull ? allowed_lull * 5 : 200;
2123         symlink_timeset_failed_flags = ITEM_REPORT_TIME
2124             | (protocol_version >= 30 || !am_server ? ITEM_REPORT_TIMEFAIL : 0);
2125         implied_dirs_are_missing = relative_paths && !implied_dirs && protocol_version < 30;
2126
2127         if (DEBUG_GTE(GENR, 1))
2128                 rprintf(FINFO, "generator starting pid=%ld\n", (long)getpid());
2129
2130         if (delete_before && !solo_file && cur_flist->used > 0)
2131                 do_delete_pass();
2132         if (delete_during == 2) {
2133                 deldelay_size = BIGPATHBUFLEN * 4;
2134                 deldelay_buf = new_array(char, deldelay_size);
2135                 if (!deldelay_buf)
2136                         out_of_memory("delete-delay");
2137         }
2138         info_levels[INFO_FLIST] = info_levels[INFO_PROGRESS] = 0;
2139
2140         if (append_mode > 0 || whole_file < 0)
2141                 whole_file = 0;
2142         if (DEBUG_GTE(FLIST, 1)) {
2143                 rprintf(FINFO, "delta-transmission %s\n",
2144                         whole_file
2145                         ? "disabled for local transfer or --whole-file"
2146                         : "enabled");
2147         }
2148
2149         dflt_perms = (ACCESSPERMS & ~orig_umask);
2150
2151         do {
2152 #ifdef SUPPORT_HARD_LINKS
2153                 if (preserve_hard_links && inc_recurse) {
2154                         while (!flist_eof && file_total < MIN_FILECNT_LOOKAHEAD/2)
2155                                 wait_for_receiver();
2156                 }
2157 #endif
2158
2159                 if (inc_recurse && cur_flist->parent_ndx >= 0) {
2160                         struct file_struct *fp = dir_flist->files[cur_flist->parent_ndx];
2161                         if (solo_file)
2162                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2163                         else
2164                                 f_name(fp, fbuf);
2165                         ndx = cur_flist->ndx_start - 1;
2166                         recv_generator(fbuf, fp, ndx, itemizing, code, f_out);
2167                         if (delete_during && dry_run < 2 && !list_only
2168                          && !(fp->flags & FLAG_MISSING_DIR)) {
2169                                 if (fp->flags & FLAG_CONTENT_DIR) {
2170                                         dev_t dirdev;
2171                                         if (one_file_system) {
2172                                                 uint32 *devp = F_DIR_DEV_P(fp);
2173                                                 dirdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
2174                                         } else
2175                                                 dirdev = MAKEDEV(0, 0);
2176                                         delete_in_dir(fbuf, fp, &dirdev);
2177                                 } else
2178                                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(fp));
2179                         }
2180                 }
2181                 for (i = cur_flist->low; i <= cur_flist->high; i++) {
2182                         struct file_struct *file = cur_flist->sorted[i];
2183
2184                         if (!F_IS_ACTIVE(file))
2185                                 continue;
2186
2187                         if (unsort_ndx)
2188                                 ndx = F_NDX(file);
2189                         else
2190                                 ndx = i + cur_flist->ndx_start;
2191
2192                         if (solo_file)
2193                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2194                         else
2195                                 f_name(file, fbuf);
2196                         recv_generator(fbuf, file, ndx, itemizing, code, f_out);
2197
2198                         check_for_finished_files(itemizing, code, 0);
2199
2200                         if (i + cur_flist->ndx_start >= next_loopchk) {
2201                                 if (allowed_lull)
2202                                         maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
2203                                 else
2204                                         maybe_flush_socket(0);
2205                                 next_loopchk += loopchk_limit;
2206                         }
2207                 }
2208
2209                 if (!inc_recurse) {
2210                         write_ndx(f_out, NDX_DONE);
2211                         break;
2212                 }
2213
2214                 while (1) {
2215                         check_for_finished_files(itemizing, code, 1);
2216                         if (cur_flist->next || flist_eof)
2217                                 break;
2218                         wait_for_receiver();
2219                 }
2220         } while ((cur_flist = cur_flist->next) != NULL);
2221
2222         if (delete_during)
2223                 delete_in_dir(NULL, NULL, &dev_zero);
2224         phase++;
2225         if (DEBUG_GTE(GENR, 1))
2226                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2227
2228         while (1) {
2229                 check_for_finished_files(itemizing, code, 1);
2230                 if (msgdone_cnt)
2231                         break;
2232                 wait_for_receiver();
2233         }
2234
2235         phase++;
2236         if (DEBUG_GTE(GENR, 1))
2237                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2238
2239         write_ndx(f_out, NDX_DONE);
2240
2241         /* Reduce round-trip lag-time for a useless delay-updates phase. */
2242         if (protocol_version >= 29 && EARLY_DELAY_DONE_MSG())
2243                 write_ndx(f_out, NDX_DONE);
2244
2245         if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG()) {
2246                 if ((INFO_GTE(STATS, 2) && (delete_mode || force_delete)) || read_batch)
2247                         write_del_stats(f_out);
2248                 if (EARLY_DELAY_DONE_MSG()) /* Can't send this before delay */
2249                         write_ndx(f_out, NDX_DONE);
2250         }
2251
2252         /* Read MSG_DONE for the redo phase (and any prior messages). */
2253         while (1) {
2254                 check_for_finished_files(itemizing, code, 0);
2255                 if (msgdone_cnt > 1)
2256                         break;
2257                 wait_for_receiver();
2258         }
2259
2260         if (protocol_version >= 29) {
2261                 phase++;
2262                 if (DEBUG_GTE(GENR, 1))
2263                         rprintf(FINFO, "generate_files phase=%d\n", phase);
2264                 if (!EARLY_DELAY_DONE_MSG()) {
2265                         write_ndx(f_out, NDX_DONE);
2266                         if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG())
2267                                 write_ndx(f_out, NDX_DONE);
2268                 }
2269                 /* Read MSG_DONE for delay-updates phase & prior messages. */
2270                 while (msgdone_cnt == 2)
2271                         wait_for_receiver();
2272         }
2273
2274         info_levels[INFO_FLIST] = save_info_flist;
2275         info_levels[INFO_PROGRESS] = save_info_progress;
2276
2277         if (delete_during == 2)
2278                 do_delayed_deletions(fbuf);
2279         if (delete_after && !solo_file && file_total > 0)
2280                 do_delete_pass();
2281
2282         if (max_delete >= 0 && skipped_deletes) {
2283                 rprintf(FWARNING,
2284                         "Deletions stopped due to --max-delete limit (%d skipped)\n",
2285                         skipped_deletes);
2286                 io_error |= IOERR_DEL_LIMIT;
2287         }
2288
2289         if (protocol_version >= 31) {
2290                 if (!EARLY_DELETE_DONE_MSG()) {
2291                         if (INFO_GTE(STATS, 2) || read_batch)
2292                                 write_del_stats(f_out);
2293                         write_ndx(f_out, NDX_DONE);
2294                 }
2295
2296                 /* Read MSG_DONE for late-delete phase & prior messages. */
2297                 while (msgdone_cnt == 3)
2298                         wait_for_receiver();
2299         }
2300
2301         if ((need_retouch_dir_perms || need_retouch_dir_times)
2302          && dir_tweaking && (!inc_recurse || delete_during == 2))
2303                 touch_up_dirs(dir_flist, -1);
2304
2305         if (DEBUG_GTE(GENR, 1))
2306                 rprintf(FINFO, "generate_files finished\n");
2307 }