generator.c

   1 /*
   2  * Routines that are exclusive to the generator process.
   3  *
   4  * Copyright (C) 1996-2000 Andrew Tridgell
   5  * Copyright (C) 1996 Paul Mackerras
   6  * Copyright (C) 2002 Martin Pool <mbp@samba.org>
   7  * Copyright (C) 2003-2009 Wayne Davison
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 3 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, visit the http://fsf.org website.
  21  */
  22
  23 #include "rsync.h"
  24 #include "inums.h"
  25 #include "ifuncs.h"
  26
  27 extern int dry_run;
  28 extern int do_xfers;
  29 extern int stdout_format_has_i;
  30 extern int logfile_format_has_i;
  31 extern int am_root;
  32 extern int am_server;
  33 extern int am_daemon;
  34 extern int inc_recurse;
  35 extern int relative_paths;
  36 extern int implied_dirs;
  37 extern int keep_dirlinks;
  38 extern int preserve_acls;
  39 extern int preserve_xattrs;
  40 extern int preserve_links;
  41 extern int preserve_devices;
  42 extern int preserve_specials;
  43 extern int preserve_hard_links;
  44 extern int preserve_executability;
  45 extern int preserve_perms;
  46 extern int preserve_times;
  47 extern int delete_mode;
  48 extern int delete_before;
  49 extern int delete_during;
  50 extern int delete_after;
  51 extern int missing_args;
  52 extern int msgdone_cnt;
  53 extern int ignore_errors;
  54 extern int remove_source_files;
  55 extern int delay_updates;
  56 extern int update_only;
  57 extern int human_readable;
  58 extern int ignore_existing;
  59 extern int ignore_non_existing;
  60 extern int inplace;
  61 extern int append_mode;
  62 extern int make_backups;
  63 extern int csum_length;
  64 extern int ignore_times;
  65 extern int size_only;
  66 extern OFF_T max_size;
  67 extern OFF_T min_size;
  68 extern int io_error;
  69 extern int flist_eof;
  70 extern int allowed_lull;
  71 extern int sock_f_out;
  72 extern int protocol_version;
  73 extern int file_total;
  74 extern int fuzzy_basis;
  75 extern int always_checksum;
  76 extern int checksum_len;
  77 extern char *partial_dir;
  78 extern int compare_dest;
  79 extern int copy_dest;
  80 extern int link_dest;
  81 extern int whole_file;
  82 extern int list_only;
  83 extern int read_batch;
  84 extern int write_batch;
  85 extern int safe_symlinks;
  86 extern long block_size; /* "long" because popt can't set an int32. */
  87 extern int unsort_ndx;
  88 extern int max_delete;
  89 extern int force_delete;
  90 extern int one_file_system;
  91 extern int skipped_deletes;
  92 extern dev_t filesystem_dev;
  93 extern mode_t orig_umask;
  94 extern uid_t our_uid;
  95 extern char *tmpdir;
  96 extern char *basis_dir[MAX_BASIS_DIRS+1];
  97 extern struct file_list *cur_flist, *first_flist, *dir_flist;
  98 extern filter_rule_list filter_list, daemon_filter_list;
  99
 100 int maybe_ATTRS_REPORT = 0;
 101
 102 static dev_t dev_zero;
 103 static int deldelay_size = 0, deldelay_cnt = 0;
 104 static char *deldelay_buf = NULL;
 105 static int deldelay_fd = -1;
 106 static int loopchk_limit;
 107 static int dir_tweaking;
 108 static int symlink_timeset_failed_flags;
 109 static int need_retouch_dir_times;
 110 static int need_retouch_dir_perms;
 111 static const char *solo_file = NULL;
 112
 113 enum nonregtype {
 114     TYPE_DIR, TYPE_SPECIAL, TYPE_DEVICE, TYPE_SYMLINK
 115 };
 116
 117 /* Forward declarations. */
 118 #ifdef SUPPORT_HARD_LINKS
 119 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
 120                                  enum logcode code, int f_out);
 121 #endif
 122
 123 #define EARLY_DELAY_DONE_MSG() (!delay_updates)
 124 #define EARLY_DELETE_DONE_MSG() (!(delete_during == 2 || delete_after))
 125
 126 static int start_delete_delay_temp(void)
 127 {
 128         char fnametmp[MAXPATHLEN];
 129         int save_dry_run = dry_run;
 130
 131         dry_run = 0;
 132         if (!get_tmpname(fnametmp, "deldelay", False)
 133          || (deldelay_fd = do_mkstemp(fnametmp, 0600)) < 0) {
 134                 rprintf(FINFO, "NOTE: Unable to create delete-delay temp file%s.\n",
 135                         inc_recurse ? "" : " -- switching to --delete-after");
 136                 delete_during = 0;
 137                 delete_after = !inc_recurse;
 138                 dry_run = save_dry_run;
 139                 return 0;
 140         }
 141         unlink(fnametmp);
 142         dry_run = save_dry_run;
 143         return 1;
 144 }
 145
 146 static int flush_delete_delay(void)
 147 {
 148         if (deldelay_fd < 0 && !start_delete_delay_temp())
 149                 return 0;
 150         if (write(deldelay_fd, deldelay_buf, deldelay_cnt) != deldelay_cnt) {
 151                 rsyserr(FERROR, errno, "flush of delete-delay buffer");
 152                 delete_during = 0;
 153                 delete_after = !inc_recurse;
 154                 close(deldelay_fd);
 155                 return 0;
 156         }
 157         deldelay_cnt = 0;
 158         return 1;
 159 }
 160
 161 static int remember_delete(struct file_struct *file, const char *fname, int flags)
 162 {
 163         int len;
 164
 165         if (deldelay_cnt == deldelay_size && !flush_delete_delay())
 166                 return 0;
 167
 168         if (flags & DEL_NO_UID_WRITE)
 169                 deldelay_buf[deldelay_cnt++] = '!';
 170
 171         while (1) {
 172                 len = snprintf(deldelay_buf + deldelay_cnt,
 173                                deldelay_size - deldelay_cnt,
 174                                "%x %s%c",
 175                                (int)file->mode, fname, '\0');
 176                 if ((deldelay_cnt += len) <= deldelay_size)
 177                         break;
 178                 deldelay_cnt -= len;
 179                 if (!flush_delete_delay())
 180                         return 0;
 181         }
 182
 183         return 1;
 184 }
 185
 186 static int read_delay_line(char *buf, int *flags_p)
 187 {
 188         static int read_pos = 0;
 189         int j, len, mode;
 190         char *bp, *past_space;
 191
 192         while (1) {
 193                 for (j = read_pos; j < deldelay_cnt && deldelay_buf[j]; j++) {}
 194                 if (j < deldelay_cnt)
 195                         break;
 196                 if (deldelay_fd < 0) {
 197                         if (j > read_pos)
 198                                 goto invalid_data;
 199                         return -1;
 200                 }
 201                 deldelay_cnt -= read_pos;
 202                 if (deldelay_cnt == deldelay_size)
 203                         goto invalid_data;
 204                 if (deldelay_cnt && read_pos) {
 205                         memmove(deldelay_buf, deldelay_buf + read_pos,
 206                                 deldelay_cnt);
 207                 }
 208                 len = read(deldelay_fd, deldelay_buf + deldelay_cnt,
 209                            deldelay_size - deldelay_cnt);
 210                 if (len == 0) {
 211                         if (deldelay_cnt) {
 212                                 rprintf(FERROR,
 213                                     "ERROR: unexpected EOF in delete-delay file.\n");
 214                         }
 215                         return -1;
 216                 }
 217                 if (len < 0) {
 218                         rsyserr(FERROR, errno,
 219                                 "reading delete-delay file");
 220                         return -1;
 221                 }
 222                 deldelay_cnt += len;
 223                 read_pos = 0;
 224         }
 225
 226         bp = deldelay_buf + read_pos;
 227         if (*bp == '!') {
 228                 bp++;
 229                 *flags_p = DEL_NO_UID_WRITE;
 230         } else
 231                 *flags_p = 0;
 232
 233         if (sscanf(bp, "%x ", &mode) != 1) {
 234           invalid_data:
 235                 rprintf(FERROR, "ERROR: invalid data in delete-delay file.\n");
 236                 return -1;
 237         }
 238         past_space = strchr(bp, ' ') + 1;
 239         len = j - read_pos - (past_space - bp) + 1; /* count the '\0' */
 240         read_pos = j + 1;
 241
 242         if (len > MAXPATHLEN) {
 243                 rprintf(FERROR, "ERROR: filename too long in delete-delay file.\n");
 244                 return -1;
 245         }
 246
 247         /* The caller needs the name in a MAXPATHLEN buffer, so we copy it
 248          * instead of returning a pointer to our buffer. */
 249         memcpy(buf, past_space, len);
 250
 251         return mode;
 252 }
 253
 254 static void do_delayed_deletions(char *delbuf)
 255 {
 256         int mode, flags;
 257
 258         if (deldelay_fd >= 0) {
 259                 if (deldelay_cnt && !flush_delete_delay())
 260                         return;
 261                 lseek(deldelay_fd, 0, 0);
 262         }
 263         while ((mode = read_delay_line(delbuf, &flags)) >= 0)
 264                 delete_item(delbuf, mode, flags | DEL_RECURSE);
 265         if (deldelay_fd >= 0)
 266                 close(deldelay_fd);
 267 }
 268
 269 /* This function is used to implement per-directory deletion, and is used by
 270  * all the --delete-WHEN options.  Note that the fbuf pointer must point to a
 271  * MAXPATHLEN buffer with the name of the directory in it (the functions we
 272  * call will append names onto the end, but the old dir value will be restored
 273  * on exit). */
 274 static void delete_in_dir(char *fbuf, struct file_struct *file, dev_t *fs_dev)
 275 {
 276         static int already_warned = 0;
 277         struct file_list *dirlist;
 278         char delbuf[MAXPATHLEN];
 279         int dlen, i;
 280
 281         if (!fbuf) {
 282                 change_local_filter_dir(NULL, 0, 0);
 283                 return;
 284         }
 285
 286         if (DEBUG_GTE(DEL, 2))
 287                 rprintf(FINFO, "delete_in_dir(%s)\n", fbuf);
 288
 289         if (allowed_lull)
 290                 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
 291
 292         if (io_error & IOERR_GENERAL && !ignore_errors) {
 293                 if (already_warned)
 294                         return;
 295                 rprintf(FINFO,
 296                         "IO error encountered -- skipping file deletion\n");
 297                 already_warned = 1;
 298                 return;
 299         }
 300
 301         dlen = strlen(fbuf);
 302         change_local_filter_dir(fbuf, dlen, F_DEPTH(file));
 303
 304         if (one_file_system) {
 305                 if (file->flags & FLAG_TOP_DIR)
 306                         filesystem_dev = *fs_dev;
 307                 else if (filesystem_dev != *fs_dev)
 308                         return;
 309         }
 310
 311         dirlist = get_dirlist(fbuf, dlen, 0);
 312
 313         /* If an item in dirlist is not found in flist, delete it
 314          * from the filesystem. */
 315         for (i = dirlist->used; i--; ) {
 316                 struct file_struct *fp = dirlist->files[i];
 317                 if (!F_IS_ACTIVE(fp))
 318                         continue;
 319                 if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) {
 320                         if (INFO_GTE(MOUNT, 1))
 321                                 rprintf(FINFO, "cannot delete mount point: %s\n",
 322                                         f_name(fp, NULL));
 323                         continue;
 324                 }
 325                 /* Here we want to match regardless of file type.  Replacement
 326                  * of a file with one of another type is handled separately by
 327                  * a delete_item call with a DEL_MAKE_ROOM flag. */
 328                 if (flist_find_ignore_dirness(cur_flist, fp) < 0) {
 329                         int flags = DEL_RECURSE;
 330                         if (!(fp->mode & S_IWUSR) && !am_root && fp->flags & FLAG_OWNED_BY_US)
 331                                 flags |= DEL_NO_UID_WRITE;
 332                         f_name(fp, delbuf);
 333                         if (delete_during == 2) {
 334                                 if (!remember_delete(fp, delbuf, flags))
 335                                         break;
 336                         } else
 337                                 delete_item(delbuf, fp->mode, flags);
 338                 }
 339         }
 340
 341         flist_free(dirlist);
 342 }
 343
 344 /* This deletes any files on the receiving side that are not present on the
 345  * sending side.  This is used by --delete-before and --delete-after. */
 346 static void do_delete_pass(void)
 347 {
 348         char fbuf[MAXPATHLEN];
 349         STRUCT_STAT st;
 350         int j;
 351
 352         /* dry_run is incremented when the destination doesn't exist yet. */
 353         if (dry_run > 1 || list_only)
 354                 return;
 355
 356         for (j = 0; j < cur_flist->used; j++) {
 357                 struct file_struct *file = cur_flist->sorted[j];
 358
 359                 f_name(file, fbuf);
 360
 361                 if (!(file->flags & FLAG_CONTENT_DIR)) {
 362                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(file));
 363                         continue;
 364                 }
 365
 366                 if (DEBUG_GTE(DEL, 1) && file->flags & FLAG_TOP_DIR)
 367                         rprintf(FINFO, "deleting in %s\n", fbuf);
 368
 369                 if (link_stat(fbuf, &st, keep_dirlinks) < 0
 370                  || !S_ISDIR(st.st_mode))
 371                         continue;
 372
 373                 delete_in_dir(fbuf, file, &st.st_dev);
 374         }
 375         delete_in_dir(NULL, NULL, &dev_zero);
 376
 377         if (INFO_GTE(FLIST, 2) && !am_server)
 378                 rprintf(FINFO, "                    \r");
 379 }
 380
 381 static inline int time_differs(struct file_struct *file, stat_x *sxp)
 382 {
 383         return cmp_time(sxp->st.st_mtime, file->modtime);
 384 }
 385
 386 static inline int perms_differ(struct file_struct *file, stat_x *sxp)
 387 {
 388         if (preserve_perms)
 389                 return !BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS);
 390
 391         if (preserve_executability)
 392                 return (sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0);
 393
 394         return 0;
 395 }
 396
 397 static inline int ownership_differs(struct file_struct *file, stat_x *sxp)
 398 {
 399         if (am_root && uid_ndx && sxp->st.st_uid != (uid_t)F_OWNER(file))
 400                 return 1;
 401
 402         if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP) && sxp->st.st_gid != (gid_t)F_GROUP(file))
 403                 return 1;
 404
 405         return 0;
 406 }
 407
 408 #ifdef SUPPORT_ACLS
 409 static inline int acls_differ(const char *fname, struct file_struct *file, stat_x *sxp)
 410 {
 411         if (preserve_acls) {
 412                 if (!ACL_READY(*sxp))
 413                         get_acl(fname, sxp);
 414                 if (set_acl(NULL, file, sxp, file->mode))
 415                         return 1;
 416         }
 417
 418         return 0;
 419 }
 420 #endif
 421
 422 #ifdef SUPPORT_XATTRS
 423 static inline int xattrs_differ(const char *fname, struct file_struct *file, stat_x *sxp)
 424 {
 425         if (preserve_xattrs) {
 426                 if (!XATTR_READY(*sxp))
 427                         get_xattr(fname, sxp);
 428                 if (xattr_diff(file, sxp, 0))
 429                         return 1;
 430         }
 431
 432         return 0;
 433 }
 434 #endif
 435
 436 int unchanged_attrs(const char *fname, struct file_struct *file, stat_x *sxp)
 437 {
 438         if (S_ISLNK(file->mode)) {
 439 #ifdef CAN_SET_SYMLINK_TIMES
 440                 if (preserve_times & PRESERVE_LINK_TIMES && time_differs(file, sxp))
 441                         return 0;
 442 #endif
 443 #ifdef CAN_CHMOD_SYMLINK
 444                 if (perms_differ(file, sxp))
 445                         return 0;
 446 #endif
 447 #ifdef CAN_CHOWN_SYMLINK
 448                 if (ownership_differs(file, sxp))
 449                         return 0;
 450 #endif
 451 #if defined SUPPORT_ACLS && 0 /* no current symlink-ACL support */
 452                 if (acls_differ(fname, file, sxp))
 453                         return 0;
 454 #endif
 455 #if defined SUPPORT_XATTRS && !defined NO_SYMLINK_XATTRS
 456                 if (xattrs_differ(fname, file, sxp))
 457                         return 0;
 458 #endif
 459         } else {
 460                 if (preserve_times && time_differs(file, sxp))
 461                         return 0;
 462                 if (perms_differ(file, sxp))
 463                         return 0;
 464                 if (ownership_differs(file, sxp))
 465                         return 0;
 466 #ifdef SUPPORT_ACLS
 467                 if (acls_differ(fname, file, sxp))
 468                         return 0;
 469 #endif
 470 #ifdef SUPPORT_XATTRS
 471                 if (xattrs_differ(fname, file, sxp))
 472                         return 0;
 473 #endif
 474         }
 475
 476         return 1;
 477 }
 478
 479 void itemize(const char *fnamecmp, struct file_struct *file, int ndx, int statret,
 480              stat_x *sxp, int32 iflags, uchar fnamecmp_type,
 481              const char *xname)
 482 {
 483         if (statret >= 0) { /* A from-dest-dir statret can == 1! */
 484                 int keep_time = !preserve_times ? 0
 485                     : S_ISDIR(file->mode) ? preserve_times & PRESERVE_DIR_TIMES
 486                     : S_ISLNK(file->mode) ? preserve_times & PRESERVE_LINK_TIMES
 487                     : 1;
 488
 489                 if (S_ISREG(file->mode) && F_LENGTH(file) != sxp->st.st_size)
 490                         iflags |= ITEM_REPORT_SIZE;
 491                 if (file->flags & FLAG_TIME_FAILED) { /* symlinks only */
 492                         if (iflags & ITEM_LOCAL_CHANGE)
 493                                 iflags |= symlink_timeset_failed_flags;
 494                 } else if (keep_time
 495                  ? cmp_time(file->modtime, sxp->st.st_mtime) != 0
 496                  : iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !(iflags & ITEM_MATCHED)
 497                   && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
 498                         iflags |= ITEM_REPORT_TIME;
 499 #if !defined HAVE_LCHMOD && !defined HAVE_SETATTRLIST
 500                 if (S_ISLNK(file->mode)) {
 501                         ;
 502                 } else
 503 #endif
 504                 if (preserve_perms) {
 505                         if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
 506                                 iflags |= ITEM_REPORT_PERMS;
 507                 } else if (preserve_executability
 508                  && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
 509                         iflags |= ITEM_REPORT_PERMS;
 510                 if (uid_ndx && am_root && (uid_t)F_OWNER(file) != sxp->st.st_uid)
 511                         iflags |= ITEM_REPORT_OWNER;
 512                 if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP)
 513                     && sxp->st.st_gid != (gid_t)F_GROUP(file))
 514                         iflags |= ITEM_REPORT_GROUP;
 515 #ifdef SUPPORT_ACLS
 516                 if (preserve_acls && !S_ISLNK(file->mode)) {
 517                         if (!ACL_READY(*sxp))
 518                                 get_acl(fnamecmp, sxp);
 519                         if (set_acl(NULL, file, sxp, file->mode))
 520                                 iflags |= ITEM_REPORT_ACL;
 521                 }
 522 #endif
 523 #ifdef SUPPORT_XATTRS
 524                 if (preserve_xattrs) {
 525                         if (!XATTR_READY(*sxp))
 526                                 get_xattr(fnamecmp, sxp);
 527                         if (xattr_diff(file, sxp, 1))
 528                                 iflags |= ITEM_REPORT_XATTR;
 529                 }
 530 #endif
 531         } else {
 532 #ifdef SUPPORT_XATTRS
 533                 if (preserve_xattrs && xattr_diff(file, NULL, 1))
 534                         iflags |= ITEM_REPORT_XATTR;
 535 #endif
 536                 iflags |= ITEM_IS_NEW;
 537         }
 538
 539         iflags &= 0xffff;
 540         if ((iflags & (SIGNIFICANT_ITEM_FLAGS|ITEM_REPORT_XATTR) || INFO_GTE(NAME, 2)
 541           || stdout_format_has_i > 1 || (xname && *xname)) && !read_batch) {
 542                 if (protocol_version >= 29) {
 543                         if (ndx >= 0)
 544                                 write_ndx(sock_f_out, ndx);
 545                         write_shortint(sock_f_out, iflags);
 546                         if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
 547                                 write_byte(sock_f_out, fnamecmp_type);
 548                         if (iflags & ITEM_XNAME_FOLLOWS)
 549                                 write_vstring(sock_f_out, xname, strlen(xname));
 550 #ifdef SUPPORT_XATTRS
 551                         if (preserve_xattrs && do_xfers
 552                          && iflags & (ITEM_REPORT_XATTR|ITEM_TRANSFER)) {
 553                                 int fd = iflags & ITEM_REPORT_XATTR
 554                                       && (protocol_version < 31 || !BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE))
 555                                        ? sock_f_out : -1;
 556                                 send_xattr_request(NULL, file, fd);
 557                         }
 558 #endif
 559                 } else if (ndx >= 0) {
 560                         enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
 561                         log_item(code, file, iflags, xname);
 562                 }
 563         }
 564 }
 565
 566
 567 /* Perform our quick-check heuristic for determining if a file is unchanged. */
 568 int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
 569 {
 570         if (st->st_size != F_LENGTH(file))
 571                 return 0;
 572
 573         /* if always checksum is set then we use the checksum instead
 574            of the file time to determine whether to sync */
 575         if (always_checksum > 0 && S_ISREG(st->st_mode)) {
 576                 char sum[MAX_DIGEST_LEN];
 577                 file_checksum(fn, sum, st->st_size);
 578                 return memcmp(sum, F_SUM(file), checksum_len) == 0;
 579         }
 580
 581         if (size_only > 0)
 582                 return 1;
 583
 584         if (ignore_times)
 585                 return 0;
 586
 587         return cmp_time(st->st_mtime, file->modtime) == 0;
 588 }
 589
 590
 591 /*
 592  * set (initialize) the size entries in the per-file sum_struct
 593  * calculating dynamic block and checksum sizes.
 594  *
 595  * This is only called from generate_and_send_sums() but is a separate
 596  * function to encapsulate the logic.
 597  *
 598  * The block size is a rounded square root of file length.
 599  *
 600  * The checksum size is determined according to:
 601  *     blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
 602  * provided by Donovan Baarda which gives a probability of rsync
 603  * algorithm corrupting data and falling back using the whole md4
 604  * checksums.
 605  *
 606  * This might be made one of several selectable heuristics.
 607  */
 608 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
 609 {
 610         int32 blength;
 611         int s2length;
 612         int64 l;
 613
 614         if (len < 0) {
 615                 /* The file length overflowed our int64 var, so we can't process this file. */
 616                 sum->count = -1; /* indicate overflow error */
 617                 return;
 618         }
 619
 620         if (block_size)
 621                 blength = block_size;
 622         else if (len <= BLOCK_SIZE * BLOCK_SIZE)
 623                 blength = BLOCK_SIZE;
 624         else {
 625                 int32 max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE;
 626                 int32 c;
 627                 int cnt;
 628                 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
 629                 if (c < 0 || c >= max_blength)
 630                         blength = max_blength;
 631                 else {
 632                     blength = 0;
 633                     do {
 634                             blength |= c;
 635                             if (len < (int64)blength * blength)
 636                                     blength &= ~c;
 637                             c >>= 1;
 638                     } while (c >= 8);   /* round to multiple of 8 */
 639                     blength = MAX(blength, BLOCK_SIZE);
 640                 }
 641         }
 642
 643         if (protocol_version < 27) {
 644                 s2length = csum_length;
 645         } else if (csum_length == SUM_LENGTH) {
 646                 s2length = SUM_LENGTH;
 647         } else {
 648                 int32 c;
 649                 int b = BLOCKSUM_BIAS;
 650                 for (l = len; l >>= 1; b += 2) {}
 651                 for (c = blength; (c >>= 1) && b; b--) {}
 652                 /* add a bit, subtract rollsum, round up. */
 653                 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
 654                 s2length = MAX(s2length, csum_length);
 655                 s2length = MIN(s2length, SUM_LENGTH);
 656         }
 657
 658         sum->flength    = len;
 659         sum->blength    = blength;
 660         sum->s2length   = s2length;
 661         sum->remainder  = (int32)(len % blength);
 662         sum->count      = (int32)(l = (len / blength) + (sum->remainder != 0));
 663
 664         if ((int64)sum->count != l)
 665                 sum->count = -1;
 666
 667         if (sum->count && DEBUG_GTE(DELTASUM, 2)) {
 668                 rprintf(FINFO,
 669                         "count=%s rem=%ld blength=%ld s2length=%d flength=%s\n",
 670                         big_num(sum->count), (long)sum->remainder, (long)sum->blength,
 671                         sum->s2length, big_num(sum->flength));
 672         }
 673 }
 674
 675
 676 /*
 677  * Generate and send a stream of signatures/checksums that describe a buffer
 678  *
 679  * Generate approximately one checksum every block_len bytes.
 680  */
 681 static int generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
 682 {
 683         int32 i;
 684         struct map_struct *mapbuf;
 685         struct sum_struct sum;
 686         OFF_T offset = 0;
 687
 688         sum_sizes_sqroot(&sum, len);
 689         if (sum.count < 0)
 690                 return -1;
 691         write_sum_head(f_out, &sum);
 692
 693         if (append_mode > 0 && f_copy < 0)
 694                 return 0;
 695
 696         if (len > 0)
 697                 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
 698         else
 699                 mapbuf = NULL;
 700
 701         for (i = 0; i < sum.count; i++) {
 702                 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
 703                 char *map = map_ptr(mapbuf, offset, n1);
 704                 char sum2[SUM_LENGTH];
 705                 uint32 sum1;
 706
 707                 len -= n1;
 708                 offset += n1;
 709
 710                 if (f_copy >= 0) {
 711                         full_write(f_copy, map, n1);
 712                         if (append_mode > 0)
 713                                 continue;
 714                 }
 715
 716                 sum1 = get_checksum1(map, n1);
 717                 get_checksum2(map, n1, sum2);
 718
 719                 if (DEBUG_GTE(DELTASUM, 3)) {
 720                         rprintf(FINFO,
 721                                 "chunk[%s] offset=%s len=%ld sum1=%08lx\n",
 722                                 big_num(i), big_num(offset - n1), (long)n1,
 723                                 (unsigned long)sum1);
 724                 }
 725                 write_int(f_out, sum1);
 726                 write_buf(f_out, sum2, sum.s2length);
 727         }
 728
 729         if (mapbuf)
 730                 unmap_file(mapbuf);
 731
 732         return 0;
 733 }
 734
 735
 736 /* Try to find a filename in the same dir as "fname" with a similar name. */
 737 static struct file_struct *find_fuzzy(struct file_struct *file, struct file_list *dirlist_array[], uchar *fnamecmp_type_ptr)
 738 {
 739         int fname_len, fname_suf_len;
 740         const char *fname_suf, *fname = file->basename;
 741         uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
 742         int i, j;
 743         struct file_struct *lowest_fp = NULL;
 744
 745         fname_len = strlen(fname);
 746         fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
 747
 748         /* Try to find an exact size+mtime match first. */
 749         for (i = 0; i < fuzzy_basis; i++) {
 750                 struct file_list *dirlist = dirlist_array[i];
 751
 752                 if (!dirlist)
 753                         continue;
 754
 755                 for (j = 0; j < dirlist->used; j++) {
 756                         struct file_struct *fp = dirlist->files[j];
 757
 758                         if (!S_ISREG(fp->mode) || !F_LENGTH(fp) || fp->flags & FLAG_FILE_SENT)
 759                                 continue;
 760
 761                         if (F_LENGTH(fp) == F_LENGTH(file) && cmp_time(fp->modtime, file->modtime) == 0) {
 762                                 if (DEBUG_GTE(FUZZY, 2))
 763                                         rprintf(FINFO, "fuzzy size/modtime match for %s\n", f_name(fp, NULL));
 764                                 *fnamecmp_type_ptr = FNAMECMP_FUZZY + i;
 765                                 return fp;
 766                         }
 767
 768                 }
 769         }
 770
 771         for (i = 0; i < fuzzy_basis; i++) {
 772                 struct file_list *dirlist = dirlist_array[i];
 773
 774                 if (!dirlist)
 775                         continue;
 776
 777                 for (j = 0; j < dirlist->used; j++) {
 778                         struct file_struct *fp = dirlist->files[j];
 779                         const char *suf, *name;
 780                         int len, suf_len;
 781                         uint32 dist;
 782
 783                         if (!S_ISREG(fp->mode) || !F_LENGTH(fp) || fp->flags & FLAG_FILE_SENT)
 784                                 continue;
 785
 786                         name = fp->basename;
 787                         len = strlen(name);
 788                         suf = find_filename_suffix(name, len, &suf_len);
 789
 790                         dist = fuzzy_distance(name, len, fname, fname_len);
 791                         /* Add some extra weight to how well the suffixes match. */
 792                         dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len) * 10;
 793                         if (DEBUG_GTE(FUZZY, 2)) {
 794                                 rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
 795                                         f_name(fp, NULL), (int)(dist>>16), (int)(dist&0xFFFF));
 796                         }
 797                         if (dist <= lowest_dist) {
 798                                 lowest_dist = dist;
 799                                 lowest_fp = fp;
 800                                 *fnamecmp_type_ptr = FNAMECMP_FUZZY + i;
 801                         }
 802                 }
 803         }
 804
 805         return lowest_fp;
 806 }
 807
 808 /* Copy a file found in our --copy-dest handling. */
 809 static int copy_altdest_file(const char *src, const char *dest, struct file_struct *file)
 810 {
 811         char buf[MAXPATHLEN];
 812         const char *copy_to, *partialptr;
 813         int save_preserve_xattrs = preserve_xattrs;
 814         int ok, fd_w;
 815
 816         if (inplace) {
 817                 /* Let copy_file open the destination in place. */
 818                 fd_w = -1;
 819                 copy_to = dest;
 820         } else {
 821                 fd_w = open_tmpfile(buf, dest, file);
 822                 if (fd_w < 0)
 823                         return -1;
 824                 copy_to = buf;
 825         }
 826         cleanup_set(copy_to, NULL, NULL, -1, -1);
 827         if (copy_file(src, copy_to, fd_w, file->mode) < 0) {
 828                 if (INFO_GTE(COPY, 1)) {
 829                         rsyserr(FINFO, errno, "copy_file %s => %s",
 830                                 full_fname(src), copy_to);
 831                 }
 832                 /* Try to clean up. */
 833                 unlink(copy_to);
 834                 cleanup_disable();
 835                 return -1;
 836         }
 837         partialptr = partial_dir ? partial_dir_fname(dest) : NULL;
 838         preserve_xattrs = 0; /* xattrs were copied with file */
 839         ok = finish_transfer(dest, copy_to, src, partialptr, file, 1, 0);
 840         preserve_xattrs = save_preserve_xattrs;
 841         cleanup_disable();
 842         return ok ? 0 : -1;
 843 }
 844
 845 /* This is only called for regular files.  We return -2 if we've finished
 846  * handling the file, -1 if no dest-linking occurred, or a non-negative
 847  * value if we found an alternate basis file. */
 848 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
 849                          char *cmpbuf, stat_x *sxp, int itemizing,
 850                          enum logcode code)
 851 {
 852         int best_match = -1;
 853         int match_level = 0;
 854         int j = 0;
 855
 856         do {
 857                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 858                 if (link_stat(cmpbuf, &sxp->st, 0) < 0 || !S_ISREG(sxp->st.st_mode))
 859                         continue;
 860                 switch (match_level) {
 861                 case 0:
 862                         best_match = j;
 863                         match_level = 1;
 864                         /* FALL THROUGH */
 865                 case 1:
 866                         if (!unchanged_file(cmpbuf, file, &sxp->st))
 867                                 continue;
 868                         best_match = j;
 869                         match_level = 2;
 870                         /* FALL THROUGH */
 871                 case 2:
 872                         if (!unchanged_attrs(cmpbuf, file, sxp))
 873                                 continue;
 874                         best_match = j;
 875                         match_level = 3;
 876                         break;
 877                 }
 878                 break;
 879         } while (basis_dir[++j] != NULL);
 880
 881         if (!match_level)
 882                 return -1;
 883
 884         if (j != best_match) {
 885                 j = best_match;
 886                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 887                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
 888                         return -1;
 889         }
 890
 891         if (match_level == 3 && !copy_dest) {
 892 #ifdef SUPPORT_HARD_LINKS
 893                 if (link_dest) {
 894                         if (!hard_link_one(file, fname, cmpbuf, 1))
 895                                 goto try_a_copy;
 896                         if (preserve_hard_links && F_IS_HLINKED(file))
 897                                 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, j);
 898                         if (!maybe_ATTRS_REPORT && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
 899                                 itemize(cmpbuf, file, ndx, 1, sxp,
 900                                         ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS,
 901                                         0, "");
 902                         }
 903                 } else
 904 #endif
 905                 if (itemizing)
 906                         itemize(cmpbuf, file, ndx, 0, sxp, 0, 0, NULL);
 907                 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT)
 908                         rprintf(FCLIENT, "%s is uptodate\n", fname);
 909                 return -2;
 910         }
 911
 912         if (match_level >= 2) {
 913 #ifdef SUPPORT_HARD_LINKS
 914           try_a_copy: /* Copy the file locally. */
 915 #endif
 916                 if (!dry_run && copy_altdest_file(cmpbuf, fname, file) < 0)
 917                         return -1;
 918                 if (itemizing)
 919                         itemize(cmpbuf, file, ndx, 0, sxp, ITEM_LOCAL_CHANGE, 0, NULL);
 920                 if (maybe_ATTRS_REPORT
 921                  && ((!itemizing && INFO_GTE(NAME, 1) && match_level == 2)
 922                   || (INFO_GTE(NAME, 2) && match_level == 3))) {
 923                         code = match_level == 3 ? FCLIENT : FINFO;
 924                         rprintf(code, "%s%s\n", fname,
 925                                 match_level == 3 ? " is uptodate" : "");
 926                 }
 927 #ifdef SUPPORT_HARD_LINKS
 928                 if (preserve_hard_links && F_IS_HLINKED(file))
 929                         finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, -1);
 930 #endif
 931                 return -2;
 932         }
 933
 934         return FNAMECMP_BASIS_DIR_LOW + j;
 935 }
 936
 937 /* This is only called for non-regular files.  We return -2 if we've finished
 938  * handling the file, or -1 if no dest-linking occurred, or a non-negative
 939  * value if we found an alternate basis file. */
 940 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
 941                          char *cmpbuf, stat_x *sxp, int itemizing,
 942                          enum logcode code)
 943 {
 944         int best_match = -1;
 945         int match_level = 0;
 946         enum nonregtype type;
 947         uint32 *devp;
 948 #ifdef SUPPORT_LINKS
 949         char lnk[MAXPATHLEN];
 950         int len;
 951 #endif
 952         int j = 0;
 953
 954 #ifndef SUPPORT_LINKS
 955         if (S_ISLNK(file->mode))
 956                 return -1;
 957 #endif
 958         if (S_ISDIR(file->mode)) {
 959                 type = TYPE_DIR;
 960         } else if (IS_SPECIAL(file->mode))
 961                 type = TYPE_SPECIAL;
 962         else if (IS_DEVICE(file->mode))
 963                 type = TYPE_DEVICE;
 964 #ifdef SUPPORT_LINKS
 965         else if (S_ISLNK(file->mode))
 966                 type = TYPE_SYMLINK;
 967 #endif
 968         else {
 969                 rprintf(FERROR,
 970                         "internal: try_dests_non() called with invalid mode (%o)\n",
 971                         (int)file->mode);
 972                 exit_cleanup(RERR_UNSUPPORTED);
 973         }
 974
 975         do {
 976                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 977                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
 978                         continue;
 979                 switch (type) {
 980                 case TYPE_DIR:
 981                         if (!S_ISDIR(sxp->st.st_mode))
 982                                 continue;
 983                         break;
 984                 case TYPE_SPECIAL:
 985                         if (!IS_SPECIAL(sxp->st.st_mode))
 986                                 continue;
 987                         break;
 988                 case TYPE_DEVICE:
 989                         if (!IS_DEVICE(sxp->st.st_mode))
 990                                 continue;
 991                         break;
 992                 case TYPE_SYMLINK:
 993 #ifdef SUPPORT_LINKS
 994                         if (!S_ISLNK(sxp->st.st_mode))
 995                                 continue;
 996                         break;
 997 #else
 998                         return -1;
 999 #endif
1000                 }
1001                 if (match_level < 1) {
1002                         match_level = 1;
1003                         best_match = j;
1004                 }
1005                 switch (type) {
1006                 case TYPE_DIR:
1007                 case TYPE_SPECIAL:
1008                         break;
1009                 case TYPE_DEVICE:
1010                         devp = F_RDEV_P(file);
1011                         if (sxp->st.st_rdev != MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)))
1012                                 continue;
1013                         break;
1014                 case TYPE_SYMLINK:
1015 #ifdef SUPPORT_LINKS
1016                         if ((len = do_readlink(cmpbuf, lnk, MAXPATHLEN-1)) <= 0)
1017                                 continue;
1018                         lnk[len] = '\0';
1019                         if (strcmp(lnk, F_SYMLINK(file)) != 0)
1020                                 continue;
1021                         break;
1022 #else
1023                         return -1;
1024 #endif
1025                 }
1026                 if (match_level < 2) {
1027                         match_level = 2;
1028                         best_match = j;
1029                 }
1030                 if (unchanged_attrs(cmpbuf, file, sxp)) {
1031                         match_level = 3;
1032                         best_match = j;
1033                         break;
1034                 }
1035         } while (basis_dir[++j] != NULL);
1036
1037         if (!match_level)
1038                 return -1;
1039
1040         if (j != best_match) {
1041                 j = best_match;
1042                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1043                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1044                         return -1;
1045         }
1046
1047         if (match_level == 3) {
1048 #ifdef SUPPORT_HARD_LINKS
1049                 if (link_dest
1050 #ifndef CAN_HARDLINK_SYMLINK
1051                  && !S_ISLNK(file->mode)
1052 #endif
1053 #ifndef CAN_HARDLINK_SPECIAL
1054                  && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
1055 #endif
1056                  && !S_ISDIR(file->mode)) {
1057                         if (do_link(cmpbuf, fname) < 0) {
1058                                 rsyserr(FERROR_XFER, errno,
1059                                         "failed to hard-link %s with %s",
1060                                         cmpbuf, fname);
1061                                 return j;
1062                         }
1063                         if (preserve_hard_links && F_IS_HLINKED(file))
1064                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1065                 } else
1066 #endif
1067                         match_level = 2;
1068                 if (itemizing && stdout_format_has_i
1069                  && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
1070                         int chg = compare_dest && type != TYPE_DIR ? 0
1071                             : ITEM_LOCAL_CHANGE + (match_level == 3 ? ITEM_XNAME_FOLLOWS : 0);
1072                         char *lp = match_level == 3 ? "" : NULL;
1073                         itemize(cmpbuf, file, ndx, 0, sxp, chg + ITEM_MATCHED, 0, lp);
1074                 }
1075                 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT) {
1076                         rprintf(FCLIENT, "%s%s is uptodate\n",
1077                                 fname, type == TYPE_DIR ? "/" : "");
1078                 }
1079                 return -2;
1080         }
1081
1082         return j;
1083 }
1084
1085 static void list_file_entry(struct file_struct *f)
1086 {
1087         char permbuf[PERMSTRING_SIZE];
1088         int64 len;
1089         int colwidth = human_readable ? 14 : 11;
1090
1091         if (!F_IS_ACTIVE(f)) {
1092                 /* this can happen if duplicate names were removed */
1093                 return;
1094         }
1095
1096         permstring(permbuf, f->mode);
1097         len = F_LENGTH(f);
1098
1099         /* TODO: indicate '+' if the entry has an ACL. */
1100
1101 #ifdef SUPPORT_LINKS
1102         if (preserve_links && S_ISLNK(f->mode)) {
1103                 rprintf(FINFO, "%s %*s %s %s -> %s\n",
1104                         permbuf, colwidth, human_num(len),
1105                         timestring(f->modtime), f_name(f, NULL),
1106                         F_SYMLINK(f));
1107         } else
1108 #endif
1109         if (missing_args == 2 && f->mode == 0) {
1110                 rprintf(FINFO, "%-*s %s\n",
1111                         colwidth + 31, "*missing",
1112                         f_name(f, NULL));
1113         } else {
1114                 rprintf(FINFO, "%s %*s %s %s\n",
1115                         permbuf, colwidth, human_num(len),
1116                         timestring(f->modtime), f_name(f, NULL));
1117         }
1118 }
1119
1120 static int phase = 0;
1121 static int dflt_perms;
1122
1123 static int implied_dirs_are_missing;
1124 /* Helper for recv_generator's skip_dir and dry_missing_dir tests. */
1125 static BOOL is_below(struct file_struct *file, struct file_struct *subtree)
1126 {
1127         return F_DEPTH(file) > F_DEPTH(subtree)
1128                 && (!implied_dirs_are_missing || f_name_has_prefix(file, subtree));
1129 }
1130
1131 /* Acts on the indicated item in cur_flist whose name is fname.  If a dir,
1132  * make sure it exists, and has the right permissions/timestamp info.  For
1133  * all other non-regular files (symlinks, etc.) we create them here.  For
1134  * regular files that have changed, we try to find a basis file and then
1135  * start sending checksums.  The ndx is the file's unique index value.
1136  *
1137  * The fname parameter must point to a MAXPATHLEN buffer!  (e.g it gets
1138  * passed to delete_item(), which can use it during a recursive delete.)
1139  *
1140  * Note that f_out is set to -1 when doing final directory-permission and
1141  * modification-time repair. */
1142 static void recv_generator(char *fname, struct file_struct *file, int ndx,
1143                            int itemizing, enum logcode code, int f_out)
1144 {
1145         static const char *parent_dirname = "";
1146         /* Missing dir not created due to --dry-run; will still be scanned. */
1147         static struct file_struct *dry_missing_dir = NULL;
1148         /* Missing dir whose contents are skipped altogether due to
1149          * --ignore-non-existing, daemon exclude, or mkdir failure. */
1150         static struct file_struct *skip_dir = NULL;
1151         static struct file_list *fuzzy_dirlist[MAX_BASIS_DIRS+1];
1152         static int need_fuzzy_dirlist = 0;
1153         struct file_struct *fuzzy_file = NULL;
1154         int fd = -1, f_copy = -1;
1155         stat_x sx, real_sx;
1156         STRUCT_STAT partial_st;
1157         struct file_struct *back_file = NULL;
1158         int statret, real_ret, stat_errno;
1159         char *fnamecmp, *partialptr, *backupptr = NULL;
1160         char fnamecmpbuf[MAXPATHLEN];
1161         uchar fnamecmp_type;
1162         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1163         int is_dir = !S_ISDIR(file->mode) ? 0
1164                    : inc_recurse && ndx != cur_flist->ndx_start - 1 ? -1
1165                    : 1;
1166
1167         if (DEBUG_GTE(GENR, 1))
1168                 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
1169
1170         if (list_only) {
1171                 if (is_dir < 0
1172                  || (is_dir && !implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1173                         return;
1174                 list_file_entry(file);
1175                 return;
1176         }
1177
1178         if (skip_dir) {
1179                 if (is_below(file, skip_dir)) {
1180                         if (is_dir)
1181                                 file->flags |= FLAG_MISSING_DIR;
1182 #ifdef SUPPORT_HARD_LINKS
1183                         else if (F_IS_HLINKED(file))
1184                                 handle_skipped_hlink(file, itemizing, code, f_out);
1185 #endif
1186                         return;
1187                 }
1188                 skip_dir = NULL;
1189         }
1190
1191         init_stat_x(&sx);
1192         if (daemon_filter_list.head && (*fname != '.' || fname[1])) {
1193                 if (check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
1194                         if (is_dir < 0)
1195                                 return;
1196 #ifdef SUPPORT_HARD_LINKS
1197                         if (F_IS_HLINKED(file))
1198                                 handle_skipped_hlink(file, itemizing, code, f_out);
1199 #endif
1200                         rprintf(FERROR_XFER,
1201                                 "ERROR: daemon refused to receive %s \"%s\"\n",
1202                                 is_dir ? "directory" : "file", fname);
1203                         if (is_dir)
1204                                 goto skipping_dir_contents;
1205                         return;
1206                 }
1207         }
1208
1209         if (dry_run > 1 || (dry_missing_dir && is_below(file, dry_missing_dir))) {
1210                 int i;
1211           parent_is_dry_missing:
1212                 for (i = 0; i < fuzzy_basis; i++) {
1213                         if (fuzzy_dirlist[i]) {
1214                                 flist_free(fuzzy_dirlist[i]);
1215                                 fuzzy_dirlist[i] = NULL;
1216                         }
1217                 }
1218                 parent_dirname = "";
1219                 statret = -1;
1220                 stat_errno = ENOENT;
1221         } else {
1222                 const char *dn = file->dirname ? file->dirname : ".";
1223                 dry_missing_dir = NULL;
1224                 if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
1225                         if (relative_paths && !implied_dirs
1226                          && do_stat(dn, &sx.st) < 0) {
1227                                 if (dry_run)
1228                                         goto parent_is_dry_missing;
1229                                 if (make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0) {
1230                                         rsyserr(FERROR_XFER, errno,
1231                                                 "recv_generator: mkdir %s failed",
1232                                                 full_fname(dn));
1233                                 }
1234                         }
1235                         if (fuzzy_basis) {
1236                                 int i;
1237                                 for (i = 0; i < fuzzy_basis; i++) {
1238                                         if (fuzzy_dirlist[i]) {
1239                                                 flist_free(fuzzy_dirlist[i]);
1240                                                 fuzzy_dirlist[i] = NULL;
1241                                         }
1242                                 }
1243                                 need_fuzzy_dirlist = 1;
1244                         }
1245 #ifdef SUPPORT_ACLS
1246                         if (!preserve_perms)
1247                                 dflt_perms = default_perms_for_dir(dn);
1248 #endif
1249                 }
1250                 parent_dirname = dn;
1251
1252                 if (need_fuzzy_dirlist && S_ISREG(file->mode)) {
1253                         int i;
1254                         strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf);
1255                         for (i = 0; i < fuzzy_basis; i++) {
1256                                 if (i && pathjoin(fnamecmpbuf, MAXPATHLEN, basis_dir[i-1], dn) >= MAXPATHLEN)
1257                                         continue;
1258                                 fuzzy_dirlist[i] = get_dirlist(fnamecmpbuf, -1, GDL_IGNORE_FILTER_RULES);
1259                                 if (fuzzy_dirlist[i] && fuzzy_dirlist[i]->used == 0) {
1260                                         flist_free(fuzzy_dirlist[i]);
1261                                         fuzzy_dirlist[i] = NULL;
1262                                 }
1263                         }
1264                         need_fuzzy_dirlist = 0;
1265                 }
1266
1267                 statret = link_stat(fname, &sx.st, keep_dirlinks && is_dir);
1268                 stat_errno = errno;
1269         }
1270
1271         if (missing_args == 2 && file->mode == 0) {
1272                 if (filter_list.head && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
1273                         return;
1274                 if (statret == 0)
1275                         delete_item(fname, sx.st.st_mode, del_opts);
1276                 return;
1277         }
1278
1279         if (ignore_non_existing > 0 && statret == -1 && stat_errno == ENOENT) {
1280                 if (is_dir) {
1281                         if (is_dir < 0)
1282                                 return;
1283                         skip_dir = file;
1284                         file->flags |= FLAG_MISSING_DIR;
1285                 }
1286 #ifdef SUPPORT_HARD_LINKS
1287                 else if (F_IS_HLINKED(file))
1288                         handle_skipped_hlink(file, itemizing, code, f_out);
1289 #endif
1290                 if (INFO_GTE(SKIP, 1)) {
1291                         rprintf(FINFO, "not creating new %s \"%s\"\n",
1292                                 is_dir ? "directory" : "file", fname);
1293                 }
1294                 return;
1295         }
1296
1297         if (statret == 0 && !(sx.st.st_mode & S_IWUSR)
1298          && !am_root && sx.st.st_uid == our_uid)
1299                 del_opts |= DEL_NO_UID_WRITE;
1300
1301         if (ignore_existing > 0 && statret == 0
1302          && (!is_dir || !S_ISDIR(sx.st.st_mode))) {
1303                 if (INFO_GTE(SKIP, 1) && is_dir >= 0)
1304                         rprintf(FINFO, "%s exists\n", fname);
1305 #ifdef SUPPORT_HARD_LINKS
1306                 if (F_IS_HLINKED(file))
1307                         handle_skipped_hlink(file, itemizing, code, f_out);
1308 #endif
1309                 goto cleanup;
1310         }
1311
1312         fnamecmp = fname;
1313
1314         if (is_dir) {
1315                 mode_t added_perms;
1316                 if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
1317                         goto cleanup;
1318                 if (am_root < 0) {
1319                         /* For --fake-super, the dir must be useable by the copying
1320                          * user, just like it would be for root. */
1321                         added_perms = S_IRUSR|S_IWUSR|S_IXUSR;
1322                 } else
1323                         added_perms = 0;
1324                 if (is_dir < 0) {
1325                         /* In inc_recurse mode we want to make sure any missing
1326                          * directories get created while we're still processing
1327                          * the parent dir (which allows us to touch the parent
1328                          * dir's mtime right away).  We will handle the dir in
1329                          * full later (right before we handle its contents). */
1330                         if (statret == 0
1331                          && (S_ISDIR(sx.st.st_mode)
1332                           || delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0))
1333                                 goto cleanup; /* Any errors get reported later. */
1334                         if (do_mkdir(fname, (file->mode|added_perms) & 0700) == 0)
1335                                 file->flags |= FLAG_DIR_CREATED;
1336                         goto cleanup;
1337                 }
1338                 /* The file to be received is a directory, so we need
1339                  * to prepare appropriately.  If there is already a
1340                  * file of that name and it is *not* a directory, then
1341                  * we need to delete it.  If it doesn't exist, then
1342                  * (perhaps recursively) create it. */
1343                 if (statret == 0 && !S_ISDIR(sx.st.st_mode)) {
1344                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0)
1345                                 goto skipping_dir_contents;
1346                         statret = -1;
1347                 }
1348                 if (dry_run && statret != 0) {
1349                         if (!dry_missing_dir)
1350                                 dry_missing_dir = file;
1351                         file->flags |= FLAG_MISSING_DIR;
1352                 }
1353                 init_stat_x(&real_sx);
1354                 real_sx.st = sx.st;
1355                 real_ret = statret;
1356                 if (file->flags & FLAG_DIR_CREATED)
1357                         statret = -1;
1358                 if (!preserve_perms) { /* See comment in non-dir code below. */
1359                         file->mode = dest_mode(file->mode, sx.st.st_mode,
1360                                                dflt_perms, statret == 0);
1361                 }
1362                 if (statret != 0 && basis_dir[0] != NULL) {
1363                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1364                                               itemizing, code);
1365                         if (j == -2) {
1366                                 itemizing = 0;
1367                                 code = FNONE;
1368                                 statret = 1;
1369                         } else if (j >= 0) {
1370                                 statret = 1;
1371                                 fnamecmp = fnamecmpbuf;
1372                         }
1373                 }
1374                 if (itemizing && f_out != -1) {
1375                         itemize(fnamecmp, file, ndx, statret, &sx,
1376                                 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
1377                 }
1378                 if (real_ret != 0 && do_mkdir(fname,file->mode|added_perms) < 0 && errno != EEXIST) {
1379                         if (!relative_paths || errno != ENOENT
1380                          || make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0
1381                          || (do_mkdir(fname, file->mode|added_perms) < 0 && errno != EEXIST)) {
1382                                 rsyserr(FERROR_XFER, errno,
1383                                         "recv_generator: mkdir %s failed",
1384                                         full_fname(fname));
1385                           skipping_dir_contents:
1386                                 rprintf(FERROR,
1387                                     "*** Skipping any contents from this failed directory ***\n");
1388                                 skip_dir = file;
1389                                 file->flags |= FLAG_MISSING_DIR;
1390                                 goto cleanup;
1391                         }
1392                 }
1393
1394 #ifdef SUPPORT_XATTRS
1395                 if (preserve_xattrs && statret == 1)
1396                         copy_xattrs(fnamecmpbuf, fname);
1397 #endif
1398                 if (set_file_attrs(fname, file, real_ret ? NULL : &real_sx, NULL, 0)
1399                     && INFO_GTE(NAME, 1) && code != FNONE && f_out != -1)
1400                         rprintf(code, "%s/\n", fname);
1401
1402                 /* We need to ensure that the dirs in the transfer have both
1403                  * readable and writable permissions during the time we are
1404                  * putting files within them.  This is then restored to the
1405                  * former permissions after the transfer is done. */
1406 #ifdef HAVE_CHMOD
1407                 if (!am_root && (file->mode & S_IRWXU) != S_IRWXU && dir_tweaking) {
1408                         mode_t mode = file->mode | S_IRWXU;
1409                         if (do_chmod(fname, mode) < 0) {
1410                                 rsyserr(FERROR_XFER, errno,
1411                                         "failed to modify permissions on %s",
1412                                         full_fname(fname));
1413                         }
1414                         need_retouch_dir_perms = 1;
1415                 }
1416 #endif
1417
1418                 if (real_ret != 0 && one_file_system)
1419                         real_sx.st.st_dev = filesystem_dev;
1420                 if (inc_recurse) {
1421                         if (one_file_system) {
1422                                 uint32 *devp = F_DIR_DEV_P(file);
1423                                 DEV_MAJOR(devp) = major(real_sx.st.st_dev);
1424                                 DEV_MINOR(devp) = minor(real_sx.st.st_dev);
1425                         }
1426                 }
1427                 else if (delete_during && f_out != -1 && !phase
1428                     && !(file->flags & FLAG_MISSING_DIR)) {
1429                         if (file->flags & FLAG_CONTENT_DIR)
1430                                 delete_in_dir(fname, file, &real_sx.st.st_dev);
1431                         else
1432                                 change_local_filter_dir(fname, strlen(fname), F_DEPTH(file));
1433                 }
1434                 goto cleanup;
1435         }
1436
1437         /* If we're not preserving permissions, change the file-list's
1438          * mode based on the local permissions and some heuristics. */
1439         if (!preserve_perms) {
1440                 int exists = statret == 0 && !S_ISDIR(sx.st.st_mode);
1441                 file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms,
1442                                        exists);
1443         }
1444
1445 #ifdef SUPPORT_HARD_LINKS
1446         if (preserve_hard_links && F_HLINK_NOT_FIRST(file)
1447          && hard_link_check(file, ndx, fname, statret, &sx, itemizing, code))
1448                 goto cleanup;
1449 #endif
1450
1451         if (preserve_links && S_ISLNK(file->mode)) {
1452 #ifdef SUPPORT_LINKS
1453                 const char *sl = F_SYMLINK(file);
1454                 if (safe_symlinks && unsafe_symlink(sl, fname)) {
1455                         if (INFO_GTE(NAME, 1)) {
1456                                 if (solo_file) {
1457                                         /* fname contains the destination path, but we
1458                                          * want to report the source path. */
1459                                         fname = f_name(file, NULL);
1460                                 }
1461                                 rprintf(FINFO,
1462                                         "ignoring unsafe symlink \"%s\" -> \"%s\"\n",
1463                                         fname, sl);
1464                         }
1465                         return;
1466                 }
1467                 if (statret == 0) {
1468                         char lnk[MAXPATHLEN];
1469                         int len;
1470
1471                         if (S_ISLNK(sx.st.st_mode)
1472                          && (len = do_readlink(fname, lnk, MAXPATHLEN-1)) > 0
1473                          && strncmp(lnk, sl, len) == 0 && sl[len] == '\0') {
1474                                 /* The link is pointing to the right place. */
1475                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1476                                 if (itemizing)
1477                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1478 #if defined SUPPORT_HARD_LINKS && defined CAN_HARDLINK_SYMLINK
1479                                 if (preserve_hard_links && F_IS_HLINKED(file))
1480                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1481 #endif
1482                                 if (remove_source_files == 1)
1483                                         goto return_with_success;
1484                                 goto cleanup;
1485                         }
1486                 } else if (basis_dir[0] != NULL) {
1487                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1488                                               itemizing, code);
1489                         if (j == -2) {
1490 #ifndef CAN_HARDLINK_SYMLINK
1491                                 if (link_dest) {
1492                                         /* Resort to --copy-dest behavior. */
1493                                 } else
1494 #endif
1495                                 if (!copy_dest)
1496                                         goto cleanup;
1497                                 itemizing = 0;
1498                                 code = FNONE;
1499                         } else if (j >= 0)
1500                                 statret = 1;
1501                 }
1502                 if (atomic_create(file, fname, sl, MAKEDEV(0, 0), &sx, statret == 0 ? DEL_FOR_SYMLINK : 0)) {
1503                         set_file_attrs(fname, file, NULL, NULL, 0);
1504                         if (itemizing) {
1505                                 if (statret == 0 && !S_ISLNK(sx.st.st_mode))
1506                                         statret = -1;
1507                                 itemize(fname, file, ndx, statret, &sx,
1508                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1509                         }
1510                         if (code != FNONE && INFO_GTE(NAME, 1))
1511                                 rprintf(code, "%s -> %s\n", fname, sl);
1512 #ifdef SUPPORT_HARD_LINKS
1513                         if (preserve_hard_links && F_IS_HLINKED(file))
1514                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1515 #endif
1516                         /* This does not check remove_source_files == 1
1517                          * because this is one of the items that the old
1518                          * --remove-sent-files option would remove. */
1519                         if (remove_source_files)
1520                                 goto return_with_success;
1521                 }
1522 #endif
1523                 goto cleanup;
1524         }
1525
1526         if ((am_root && preserve_devices && IS_DEVICE(file->mode))
1527          || (preserve_specials && IS_SPECIAL(file->mode))) {
1528                 dev_t rdev;
1529                 int del_for_flag = 0;
1530                 if (IS_DEVICE(file->mode)) {
1531                         uint32 *devp = F_RDEV_P(file);
1532                         rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
1533                 } else
1534                         rdev = 0;
1535                 if (statret == 0) {
1536                         if (IS_DEVICE(file->mode)) {
1537                                 if (!IS_DEVICE(sx.st.st_mode))
1538                                         statret = -1;
1539                                 del_for_flag = DEL_FOR_DEVICE;
1540                         } else {
1541                                 if (!IS_SPECIAL(sx.st.st_mode))
1542                                         statret = -1;
1543                                 del_for_flag = DEL_FOR_SPECIAL;
1544                         }
1545                         if (statret == 0
1546                          && BITS_EQUAL(sx.st.st_mode, file->mode, _S_IFMT)
1547                          && (IS_SPECIAL(sx.st.st_mode) || sx.st.st_rdev == rdev)) {
1548                                 /* The device or special file is identical. */
1549                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1550                                 if (itemizing)
1551                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1552 #ifdef SUPPORT_HARD_LINKS
1553                                 if (preserve_hard_links && F_IS_HLINKED(file))
1554                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1555 #endif
1556                                 if (remove_source_files == 1)
1557                                         goto return_with_success;
1558                                 goto cleanup;
1559                         }
1560                 } else if (basis_dir[0] != NULL) {
1561                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1562                                               itemizing, code);
1563                         if (j == -2) {
1564 #ifndef CAN_HARDLINK_SPECIAL
1565                                 if (link_dest) {
1566                                         /* Resort to --copy-dest behavior. */
1567                                 } else
1568 #endif
1569                                 if (!copy_dest)
1570                                         goto cleanup;
1571                                 itemizing = 0;
1572                                 code = FNONE;
1573                         } else if (j >= 0)
1574                                 statret = 1;
1575                 }
1576                 if (DEBUG_GTE(GENR, 1)) {
1577                         rprintf(FINFO, "mknod(%s, 0%o, [%ld,%ld])\n",
1578                                 fname, (int)file->mode,
1579                                 (long)major(rdev), (long)minor(rdev));
1580                 }
1581                 if (atomic_create(file, fname, NULL, rdev, &sx, del_for_flag)) {
1582                         set_file_attrs(fname, file, NULL, NULL, 0);
1583                         if (itemizing) {
1584                                 itemize(fname, file, ndx, statret, &sx,
1585                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1586                         }
1587                         if (code != FNONE && INFO_GTE(NAME, 1))
1588                                 rprintf(code, "%s\n", fname);
1589 #ifdef SUPPORT_HARD_LINKS
1590                         if (preserve_hard_links && F_IS_HLINKED(file))
1591                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1592 #endif
1593                         if (remove_source_files == 1)
1594                                 goto return_with_success;
1595                 }
1596                 goto cleanup;
1597         }
1598
1599         if (!S_ISREG(file->mode)) {
1600                 if (solo_file)
1601                         fname = f_name(file, NULL);
1602                 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1603                 goto cleanup;
1604         }
1605
1606         if (max_size >= 0 && F_LENGTH(file) > max_size) {
1607                 if (INFO_GTE(SKIP, 1)) {
1608                         if (solo_file)
1609                                 fname = f_name(file, NULL);
1610                         rprintf(FINFO, "%s is over max-size\n", fname);
1611                 }
1612                 goto cleanup;
1613         }
1614         if (min_size >= 0 && F_LENGTH(file) < min_size) {
1615                 if (INFO_GTE(SKIP, 1)) {
1616                         if (solo_file)
1617                                 fname = f_name(file, NULL);
1618                         rprintf(FINFO, "%s is under min-size\n", fname);
1619                 }
1620                 goto cleanup;
1621         }
1622
1623         if (update_only > 0 && statret == 0
1624             && cmp_time(sx.st.st_mtime, file->modtime) > 0) {
1625                 if (INFO_GTE(SKIP, 1))
1626                         rprintf(FINFO, "%s is newer\n", fname);
1627 #ifdef SUPPORT_HARD_LINKS
1628                 if (F_IS_HLINKED(file))
1629                         handle_skipped_hlink(file, itemizing, code, f_out);
1630 #endif
1631                 goto cleanup;
1632         }
1633
1634         fnamecmp_type = FNAMECMP_FNAME;
1635
1636         if (statret == 0 && !S_ISREG(sx.st.st_mode)) {
1637                 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_FILE) != 0)
1638                         goto cleanup;
1639                 statret = -1;
1640                 stat_errno = ENOENT;
1641         }
1642
1643         if (statret != 0 && basis_dir[0] != NULL) {
1644                 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &sx,
1645                                       itemizing, code);
1646                 if (j == -2) {
1647                         if (remove_source_files == 1)
1648                                 goto return_with_success;
1649                         goto cleanup;
1650                 }
1651                 if (j >= 0) {
1652                         fnamecmp = fnamecmpbuf;
1653                         fnamecmp_type = j;
1654                         statret = 0;
1655                 }
1656         }
1657
1658         init_stat_x(&real_sx);
1659         real_sx.st = sx.st; /* Don't copy xattr/acl pointers, as they would free wrong. */
1660         real_ret = statret;
1661
1662         if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1663             && link_stat(partialptr, &partial_st, 0) == 0
1664             && S_ISREG(partial_st.st_mode)) {
1665                 if (statret != 0)
1666                         goto prepare_to_open;
1667         } else
1668                 partialptr = NULL;
1669
1670         if (statret != 0 && fuzzy_basis) {
1671                 /* Sets fnamecmp_type to FNAMECMP_FUZZY or above. */
1672                 fuzzy_file = find_fuzzy(file, fuzzy_dirlist, &fnamecmp_type);
1673                 if (fuzzy_file) {
1674                         f_name(fuzzy_file, fnamecmpbuf);
1675                         if (DEBUG_GTE(FUZZY, 1)) {
1676                                 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1677                                         fname, fnamecmpbuf);
1678                         }
1679                         sx.st.st_size = F_LENGTH(fuzzy_file);
1680                         statret = 0;
1681                         fnamecmp = fnamecmpbuf;
1682                 }
1683         }
1684
1685         if (statret != 0) {
1686 #ifdef SUPPORT_HARD_LINKS
1687                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1688                         cur_flist->in_progress++;
1689                         goto cleanup;
1690                 }
1691 #endif
1692                 if (stat_errno == ENOENT)
1693                         goto notify_others;
1694                 rsyserr(FERROR_XFER, stat_errno, "recv_generator: failed to stat %s",
1695                         full_fname(fname));
1696                 goto cleanup;
1697         }
1698
1699         if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1700                 ;
1701         else if (fnamecmp_type == FNAMECMP_FUZZY)
1702                 ;
1703         else if (unchanged_file(fnamecmp, file, &sx.st)) {
1704                 if (partialptr) {
1705                         do_unlink(partialptr);
1706                         handle_partial_dir(partialptr, PDIR_DELETE);
1707                 }
1708                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1709                 if (itemizing)
1710                         itemize(fnamecmp, file, ndx, statret, &sx, 0, 0, NULL);
1711 #ifdef SUPPORT_HARD_LINKS
1712                 if (preserve_hard_links && F_IS_HLINKED(file))
1713                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1714 #endif
1715                 if (remove_source_files != 1)
1716                         goto cleanup;
1717           return_with_success:
1718                 if (!dry_run)
1719                         send_msg_int(MSG_SUCCESS, ndx);
1720                 goto cleanup;
1721         }
1722
1723         if (append_mode > 0 && sx.st.st_size >= F_LENGTH(file)) {
1724 #ifdef SUPPORT_HARD_LINKS
1725                 if (F_IS_HLINKED(file))
1726                         handle_skipped_hlink(file, itemizing, code, f_out);
1727 #endif
1728                 goto cleanup;
1729         }
1730
1731   prepare_to_open:
1732         if (partialptr) {
1733                 sx.st = partial_st;
1734                 fnamecmp = partialptr;
1735                 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1736                 statret = 0;
1737         }
1738
1739         if (!do_xfers)
1740                 goto notify_others;
1741
1742         if (read_batch || whole_file) {
1743                 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1744                         if (!(backupptr = get_backup_name(fname)))
1745                                 goto cleanup;
1746                         if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
1747                                 goto pretend_missing;
1748                         if (copy_file(fname, backupptr, -1, back_file->mode) < 0) {
1749                                 unmake_file(back_file);
1750                                 back_file = NULL;
1751                                 goto cleanup;
1752                         }
1753                 }
1754                 goto notify_others;
1755         }
1756
1757         if (fuzzy_dirlist[0]) {
1758                 int j = flist_find(fuzzy_dirlist[0], file);
1759                 if (j >= 0) /* don't use changing file as future fuzzy basis */
1760                         fuzzy_dirlist[0]->files[j]->flags |= FLAG_FILE_SENT;
1761         }
1762
1763         /* open the file */
1764         if ((fd = do_open(fnamecmp, O_RDONLY, 0)) < 0) {
1765                 rsyserr(FERROR, errno, "failed to open %s, continuing",
1766                         full_fname(fnamecmp));
1767           pretend_missing:
1768                 /* pretend the file didn't exist */
1769 #ifdef SUPPORT_HARD_LINKS
1770                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1771                         cur_flist->in_progress++;
1772                         goto cleanup;
1773                 }
1774 #endif
1775                 statret = real_ret = -1;
1776                 goto notify_others;
1777         }
1778
1779         if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1780                 if (!(backupptr = get_backup_name(fname))) {
1781                         close(fd);
1782                         goto cleanup;
1783                 }
1784                 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1785                         close(fd);
1786                         goto pretend_missing;
1787                 }
1788                 if (robust_unlink(backupptr) && errno != ENOENT) {
1789                         rsyserr(FERROR_XFER, errno, "unlink %s",
1790                                 full_fname(backupptr));
1791                         unmake_file(back_file);
1792                         back_file = NULL;
1793                         close(fd);
1794                         goto cleanup;
1795                 }
1796                 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1797                         rsyserr(FERROR_XFER, errno, "open %s", full_fname(backupptr));
1798                         unmake_file(back_file);
1799                         back_file = NULL;
1800                         close(fd);
1801                         goto cleanup;
1802                 }
1803                 fnamecmp_type = FNAMECMP_BACKUP;
1804         }
1805
1806         if (DEBUG_GTE(DELTASUM, 3)) {
1807                 rprintf(FINFO, "gen mapped %s of size %s\n",
1808                         fnamecmp, big_num(sx.st.st_size));
1809         }
1810
1811         if (DEBUG_GTE(DELTASUM, 2))
1812                 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1813
1814   notify_others:
1815         if (remove_source_files && !delay_updates && !phase && !dry_run)
1816                 increment_active_files(ndx, itemizing, code);
1817         if (inc_recurse && (!dry_run || write_batch < 0))
1818                 cur_flist->in_progress++;
1819 #ifdef SUPPORT_HARD_LINKS
1820         if (preserve_hard_links && F_IS_HLINKED(file))
1821                 file->flags |= FLAG_FILE_SENT;
1822 #endif
1823         write_ndx(f_out, ndx);
1824         if (itemizing) {
1825                 int iflags = ITEM_TRANSFER;
1826                 if (always_checksum > 0)
1827                         iflags |= ITEM_REPORT_CHANGE;
1828                 if (fnamecmp_type != FNAMECMP_FNAME)
1829                         iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1830                 if (fnamecmp_type >= FNAMECMP_FUZZY)
1831                         iflags |= ITEM_XNAME_FOLLOWS;
1832                 itemize(fnamecmp, file, -1, real_ret, &real_sx, iflags, fnamecmp_type,
1833                         fuzzy_file ? fuzzy_file->basename : NULL);
1834 #ifdef SUPPORT_ACLS
1835                 if (preserve_acls)
1836                         free_acl(&real_sx);
1837 #endif
1838 #ifdef SUPPORT_XATTRS
1839                 if (preserve_xattrs)
1840                         free_xattr(&real_sx);
1841 #endif
1842         }
1843
1844         if (!do_xfers) {
1845 #ifdef SUPPORT_HARD_LINKS
1846                 if (preserve_hard_links && F_IS_HLINKED(file))
1847                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1848 #endif
1849                 goto cleanup;
1850         }
1851         if (read_batch)
1852                 goto cleanup;
1853
1854         if (statret != 0 || whole_file)
1855                 write_sum_head(f_out, NULL);
1856         else if (sx.st.st_size <= 0) {
1857                 write_sum_head(f_out, NULL);
1858                 close(fd);
1859         } else {
1860                 if (generate_and_send_sums(fd, sx.st.st_size, f_out, f_copy) < 0) {
1861                         rprintf(FWARNING,
1862                             "WARNING: file is too large for checksum sending: %s\n",
1863                             fnamecmp);
1864                         write_sum_head(f_out, NULL);
1865                 }
1866                 close(fd);
1867         }
1868
1869   cleanup:
1870         if (back_file) {
1871                 int save_preserve_xattrs = preserve_xattrs;
1872                 if (f_copy >= 0)
1873                         close(f_copy);
1874 #ifdef SUPPORT_XATTRS
1875                 if (preserve_xattrs) {
1876                         copy_xattrs(fname, backupptr);
1877                         preserve_xattrs = 0;
1878                 }
1879 #endif
1880                 set_file_attrs(backupptr, back_file, NULL, NULL, 0);
1881                 preserve_xattrs = save_preserve_xattrs;
1882                 if (INFO_GTE(BACKUP, 1)) {
1883                         rprintf(FINFO, "backed up %s to %s\n",
1884                                 fname, backupptr);
1885                 }
1886                 unmake_file(back_file);
1887         }
1888
1889 #ifdef SUPPORT_ACLS
1890         if (preserve_acls)
1891                 free_acl(&sx);
1892 #endif
1893 #ifdef SUPPORT_XATTRS
1894         if (preserve_xattrs)
1895                 free_xattr(&sx);
1896 #endif
1897         return;
1898 }
1899
1900 /* If we are replacing an existing hard link, symlink, device, or special file,
1901  * create a temp-name item and rename it into place.  Only a symlink or hard
1902  * link puts a non-NULL value into the lnk arg.  Only a device puts a non-0
1903  * value into the rdev arg.  Specify 0 for the del_for_flag if there is not a
1904  * file to replace.  This returns 1 on success and 0 on failure. */
1905 int atomic_create(struct file_struct *file, char *fname, const char *lnk,
1906                   dev_t rdev, stat_x *sxp, int del_for_flag)
1907 {
1908         char tmpname[MAXPATHLEN];
1909         const char *create_name;
1910         int skip_atomic, dir_in_the_way = del_for_flag && S_ISDIR(sxp->st.st_mode);
1911
1912         if (!del_for_flag || dir_in_the_way || tmpdir || !get_tmpname(tmpname, fname, True))
1913                 skip_atomic = 1;
1914         else
1915                 skip_atomic = 0;
1916
1917         if (del_for_flag) {
1918                 if (make_backups > 0 && !dir_in_the_way) {
1919                         if (!make_backup(fname, skip_atomic))
1920                                 return 0;
1921                 } else if (skip_atomic) {
1922                         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1923                         if (delete_item(fname, sxp->st.st_mode, del_opts | del_for_flag) != 0)
1924                                 return 0;
1925                 }
1926         }
1927
1928         create_name = skip_atomic ? fname : tmpname;
1929
1930         if (lnk) {
1931 #ifdef SUPPORT_LINKS
1932                 if (S_ISLNK(file->mode)
1933 #ifdef SUPPORT_HARD_LINKS /* The first symlink in a hard-linked cluster is always created. */
1934                  && (!F_IS_HLINKED(file) || file->flags & FLAG_HLINK_FIRST)
1935 #endif
1936                  ) {
1937                         if (do_symlink(lnk, create_name) < 0) {
1938                                 rsyserr(FERROR_XFER, errno, "symlink %s -> \"%s\" failed",
1939                                         full_fname(create_name), lnk);
1940                                 return 0;
1941                         }
1942                 } else
1943 #endif
1944 #ifdef SUPPORT_HARD_LINKS
1945                 if (!hard_link_one(file, create_name, lnk, 0))
1946                         return 0;
1947 #endif
1948         } else {
1949                 if (do_mknod(create_name, file->mode, rdev) < 0) {
1950                         rsyserr(FERROR_XFER, errno, "mknod %s failed",
1951                                 full_fname(create_name));
1952                         return 0;
1953                 }
1954         }
1955
1956         if (!skip_atomic) {
1957                 if (do_rename(tmpname, fname) < 0) {
1958                         rsyserr(FERROR_XFER, errno, "rename %s -> \"%s\" failed",
1959                                 full_fname(tmpname), full_fname(fname));
1960                         do_unlink(tmpname);
1961                         return 0;
1962                 }
1963         }
1964
1965         return 1;
1966 }
1967
1968 #ifdef SUPPORT_HARD_LINKS
1969 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
1970                                  enum logcode code, int f_out)
1971 {
1972         char fbuf[MAXPATHLEN];
1973         int new_last_ndx;
1974         struct file_list *save_flist = cur_flist;
1975
1976         /* If we skip the last item in a chain of links and there was a
1977          * prior non-skipped hard-link waiting to finish, finish it now. */
1978         if ((new_last_ndx = skip_hard_link(file, &cur_flist)) < 0)
1979                 return;
1980
1981         file = cur_flist->files[new_last_ndx - cur_flist->ndx_start];
1982         cur_flist->in_progress--; /* undo prior increment */
1983         f_name(file, fbuf);
1984         recv_generator(fbuf, file, new_last_ndx, itemizing, code, f_out);
1985
1986         cur_flist = save_flist;
1987 }
1988 #endif
1989
1990 static void touch_up_dirs(struct file_list *flist, int ndx)
1991 {
1992         static int counter = 0;
1993         struct file_struct *file;
1994         char *fname;
1995         BOOL fix_dir_perms;
1996         int i, start, end;
1997
1998         if (ndx < 0) {
1999                 start = 0;
2000                 end = flist->used - 1;
2001         } else
2002                 start = end = ndx;
2003
2004         /* Fix any directory permissions that were modified during the
2005          * transfer and/or re-set any tweaked modified-time values. */
2006         for (i = start; i <= end; i++, counter++) {
2007                 file = flist->files[i];
2008                 if (!S_ISDIR(file->mode)
2009                  || (!implied_dirs && file->flags & FLAG_IMPLIED_DIR))
2010                         continue;
2011                 if (DEBUG_GTE(TIME, 2)) {
2012                         fname = f_name(file, NULL);
2013                         rprintf(FINFO, "touch_up_dirs: %s (%d)\n",
2014                                 NS(fname), i);
2015                 }
2016                 /* Be sure not to retouch permissions with --fake-super. */
2017                 fix_dir_perms = !am_root && !(file->mode & S_IWUSR);
2018                 if (!F_IS_ACTIVE(file) || file->flags & FLAG_MISSING_DIR
2019                  || !(need_retouch_dir_times || fix_dir_perms))
2020                         continue;
2021                 fname = f_name(file, NULL);
2022                 if (fix_dir_perms)
2023                         do_chmod(fname, file->mode);
2024                 if (need_retouch_dir_times) {
2025                         STRUCT_STAT st;
2026                         if (link_stat(fname, &st, 0) == 0
2027                          && cmp_time(st.st_mtime, file->modtime) != 0)
2028                                 set_modtime(fname, file->modtime, F_MOD_NSEC(file), file->mode);
2029                 }
2030                 if (counter >= loopchk_limit) {
2031                         if (allowed_lull)
2032                                 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
2033                         else
2034                                 maybe_flush_socket(0);
2035                         counter = 0;
2036                 }
2037         }
2038 }
2039
2040 void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
2041 {
2042         struct file_struct *file;
2043         struct file_list *flist;
2044         char fbuf[MAXPATHLEN];
2045         int ndx;
2046
2047         while (1) {
2048 #ifdef SUPPORT_HARD_LINKS
2049                 if (preserve_hard_links && (ndx = get_hlink_num()) != -1) {
2050                         int send_failed = (ndx == -2);
2051                         if (send_failed)
2052                                 ndx = get_hlink_num();
2053                         flist = flist_for_ndx(ndx, "check_for_finished_files.1");
2054                         file = flist->files[ndx - flist->ndx_start];
2055                         assert(file->flags & FLAG_HLINKED);
2056                         if (send_failed)
2057                                 handle_skipped_hlink(file, itemizing, code, sock_f_out);
2058                         else
2059                                 finish_hard_link(file, f_name(file, fbuf), ndx, NULL, itemizing, code, -1);
2060                         flist->in_progress--;
2061                         continue;
2062                 }
2063 #endif
2064
2065                 if (check_redo && (ndx = get_redo_num()) != -1) {
2066                         OFF_T save_max_size = max_size;
2067                         OFF_T save_min_size = min_size;
2068                         csum_length = SUM_LENGTH;
2069                         max_size = -1;
2070                         min_size = -1;
2071                         ignore_existing = -ignore_existing;
2072                         ignore_non_existing = -ignore_non_existing;
2073                         update_only = -update_only;
2074                         always_checksum = -always_checksum;
2075                         size_only = -size_only;
2076                         append_mode = -append_mode;
2077                         make_backups = -make_backups; /* avoid dup backup w/inplace */
2078                         ignore_times++;
2079
2080                         flist = cur_flist;
2081                         cur_flist = flist_for_ndx(ndx, "check_for_finished_files.2");
2082
2083                         file = cur_flist->files[ndx - cur_flist->ndx_start];
2084                         if (solo_file)
2085                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2086                         else
2087                                 f_name(file, fbuf);
2088                         recv_generator(fbuf, file, ndx, itemizing, code, sock_f_out);
2089                         cur_flist->to_redo--;
2090
2091                         cur_flist = flist;
2092
2093                         csum_length = SHORT_SUM_LENGTH;
2094                         max_size = save_max_size;
2095                         min_size = save_min_size;
2096                         ignore_existing = -ignore_existing;
2097                         ignore_non_existing = -ignore_non_existing;
2098                         update_only = -update_only;
2099                         always_checksum = -always_checksum;
2100                         size_only = -size_only;
2101                         append_mode = -append_mode;
2102                         make_backups = -make_backups;
2103                         ignore_times--;
2104                         continue;
2105                 }
2106
2107                 if (cur_flist == first_flist)
2108                         break;
2109
2110                 /* We only get here if inc_recurse is enabled. */
2111                 if (first_flist->in_progress || first_flist->to_redo)
2112                         break;
2113
2114                 write_ndx(sock_f_out, NDX_DONE);
2115                 if (!read_batch && !flist_eof) {
2116                         int old_total = 0;
2117                         for (flist = first_flist; flist != cur_flist; flist = flist->next)
2118                                 old_total += flist->used;
2119                         maybe_flush_socket(!flist_eof && file_total - old_total < MIN_FILECNT_LOOKAHEAD/2);
2120                 }
2121
2122                 if (delete_during == 2 || !dir_tweaking) {
2123                         /* Skip directory touch-up. */
2124                 } else if (first_flist->parent_ndx >= 0)
2125                         touch_up_dirs(dir_flist, first_flist->parent_ndx);
2126
2127                 flist_free(first_flist); /* updates first_flist */
2128         }
2129 }
2130
2131 void generate_files(int f_out, const char *local_name)
2132 {
2133         int i, ndx, next_loopchk = 0;
2134         char fbuf[MAXPATHLEN];
2135         int itemizing;
2136         enum logcode code;
2137         int save_info_flist = info_levels[INFO_FLIST];
2138         int save_info_progress = info_levels[INFO_PROGRESS];
2139
2140         if (protocol_version >= 29) {
2141                 itemizing = 1;
2142                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2143                 code = logfile_format_has_i ? FNONE : FLOG;
2144         } else if (am_daemon) {
2145                 itemizing = logfile_format_has_i && do_xfers;
2146                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2147                 code = itemizing || !do_xfers ? FCLIENT : FINFO;
2148         } else if (!am_server) {
2149                 itemizing = stdout_format_has_i;
2150                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2151                 code = itemizing ? FNONE : FINFO;
2152         } else {
2153                 itemizing = 0;
2154                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2155                 code = FINFO;
2156         }
2157         solo_file = local_name;
2158         dir_tweaking = !(list_only || solo_file || dry_run);
2159         need_retouch_dir_times = preserve_times & PRESERVE_DIR_TIMES;
2160         loopchk_limit = allowed_lull ? allowed_lull * 5 : 200;
2161         symlink_timeset_failed_flags = ITEM_REPORT_TIME
2162             | (protocol_version >= 30 || !am_server ? ITEM_REPORT_TIMEFAIL : 0);
2163         implied_dirs_are_missing = relative_paths && !implied_dirs && protocol_version < 30;
2164
2165         if (DEBUG_GTE(GENR, 1))
2166                 rprintf(FINFO, "generator starting pid=%d\n", (int)getpid());
2167
2168         if (delete_before && !solo_file && cur_flist->used > 0)
2169                 do_delete_pass();
2170         if (delete_during == 2) {
2171                 deldelay_size = BIGPATHBUFLEN * 4;
2172                 deldelay_buf = new_array(char, deldelay_size);
2173                 if (!deldelay_buf)
2174                         out_of_memory("delete-delay");
2175         }
2176         info_levels[INFO_FLIST] = info_levels[INFO_PROGRESS] = 0;
2177
2178         if (append_mode > 0 || whole_file < 0)
2179                 whole_file = 0;
2180         if (DEBUG_GTE(FLIST, 1)) {
2181                 rprintf(FINFO, "delta-transmission %s\n",
2182                         whole_file
2183                         ? "disabled for local transfer or --whole-file"
2184                         : "enabled");
2185         }
2186
2187         dflt_perms = (ACCESSPERMS & ~orig_umask);
2188
2189         do {
2190 #ifdef SUPPORT_HARD_LINKS
2191                 if (preserve_hard_links && inc_recurse) {
2192                         while (!flist_eof && file_total < MIN_FILECNT_LOOKAHEAD/2)
2193                                 wait_for_receiver();
2194                 }
2195 #endif
2196
2197                 if (inc_recurse && cur_flist->parent_ndx >= 0) {
2198                         struct file_struct *fp = dir_flist->files[cur_flist->parent_ndx];
2199                         if (solo_file)
2200                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2201                         else
2202                                 f_name(fp, fbuf);
2203                         ndx = cur_flist->ndx_start - 1;
2204                         recv_generator(fbuf, fp, ndx, itemizing, code, f_out);
2205                         if (delete_during && dry_run < 2 && !list_only
2206                          && !(fp->flags & FLAG_MISSING_DIR)) {
2207                                 if (fp->flags & FLAG_CONTENT_DIR) {
2208                                         dev_t dirdev;
2209                                         if (one_file_system) {
2210                                                 uint32 *devp = F_DIR_DEV_P(fp);
2211                                                 dirdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
2212                                         } else
2213                                                 dirdev = MAKEDEV(0, 0);
2214                                         delete_in_dir(fbuf, fp, &dirdev);
2215                                 } else
2216                                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(fp));
2217                         }
2218                 }
2219                 for (i = cur_flist->low; i <= cur_flist->high; i++) {
2220                         struct file_struct *file = cur_flist->sorted[i];
2221
2222                         if (!F_IS_ACTIVE(file))
2223                                 continue;
2224
2225                         if (unsort_ndx)
2226                                 ndx = F_NDX(file);
2227                         else
2228                                 ndx = i + cur_flist->ndx_start;
2229
2230                         if (solo_file)
2231                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2232                         else
2233                                 f_name(file, fbuf);
2234                         recv_generator(fbuf, file, ndx, itemizing, code, f_out);
2235
2236                         check_for_finished_files(itemizing, code, 0);
2237
2238                         if (i + cur_flist->ndx_start >= next_loopchk) {
2239                                 if (allowed_lull)
2240                                         maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
2241                                 else
2242                                         maybe_flush_socket(0);
2243                                 next_loopchk += loopchk_limit;
2244                         }
2245                 }
2246
2247                 if (!inc_recurse) {
2248                         write_ndx(f_out, NDX_DONE);
2249                         break;
2250                 }
2251
2252                 while (1) {
2253                         check_for_finished_files(itemizing, code, 1);
2254                         if (cur_flist->next || flist_eof)
2255                                 break;
2256                         wait_for_receiver();
2257                 }
2258         } while ((cur_flist = cur_flist->next) != NULL);
2259
2260         if (delete_during)
2261                 delete_in_dir(NULL, NULL, &dev_zero);
2262         phase++;
2263         if (DEBUG_GTE(GENR, 1))
2264                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2265
2266         while (1) {
2267                 check_for_finished_files(itemizing, code, 1);
2268                 if (msgdone_cnt)
2269                         break;
2270                 wait_for_receiver();
2271         }
2272
2273         phase++;
2274         if (DEBUG_GTE(GENR, 1))
2275                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2276
2277         write_ndx(f_out, NDX_DONE);
2278
2279         /* Reduce round-trip lag-time for a useless delay-updates phase. */
2280         if (protocol_version >= 29 && EARLY_DELAY_DONE_MSG())
2281                 write_ndx(f_out, NDX_DONE);
2282
2283         if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG()) {
2284                 if ((INFO_GTE(STATS, 2) && (delete_mode || force_delete)) || read_batch)
2285                         write_del_stats(f_out);
2286                 if (EARLY_DELAY_DONE_MSG()) /* Can't send this before delay */
2287                         write_ndx(f_out, NDX_DONE);
2288         }
2289
2290         /* Read MSG_DONE for the redo phase (and any prior messages). */
2291         while (1) {
2292                 check_for_finished_files(itemizing, code, 0);
2293                 if (msgdone_cnt > 1)
2294                         break;
2295                 wait_for_receiver();
2296         }
2297
2298         if (protocol_version >= 29) {
2299                 phase++;
2300                 if (DEBUG_GTE(GENR, 1))
2301                         rprintf(FINFO, "generate_files phase=%d\n", phase);
2302                 if (!EARLY_DELAY_DONE_MSG()) {
2303                         write_ndx(f_out, NDX_DONE);
2304                         if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG())
2305                                 write_ndx(f_out, NDX_DONE);
2306                 }
2307                 /* Read MSG_DONE for delay-updates phase & prior messages. */
2308                 while (msgdone_cnt == 2)
2309                         wait_for_receiver();
2310         }
2311
2312         info_levels[INFO_FLIST] = save_info_flist;
2313         info_levels[INFO_PROGRESS] = save_info_progress;
2314
2315         if (delete_during == 2)
2316                 do_delayed_deletions(fbuf);
2317         if (delete_after && !solo_file && file_total > 0)
2318                 do_delete_pass();
2319
2320         if (max_delete >= 0 && skipped_deletes) {
2321                 rprintf(FWARNING,
2322                         "Deletions stopped due to --max-delete limit (%d skipped)\n",
2323                         skipped_deletes);
2324                 io_error |= IOERR_DEL_LIMIT;
2325         }
2326
2327         if (protocol_version >= 31) {
2328                 if (!EARLY_DELETE_DONE_MSG()) {
2329                         if (INFO_GTE(STATS, 2) || read_batch)
2330                                 write_del_stats(f_out);
2331                         write_ndx(f_out, NDX_DONE);
2332                 }
2333
2334                 /* Read MSG_DONE for late-delete phase & prior messages. */
2335                 while (msgdone_cnt == 3)
2336                         wait_for_receiver();
2337         }
2338
2339         if ((need_retouch_dir_perms || need_retouch_dir_times)
2340          && dir_tweaking && (!inc_recurse || delete_during == 2))
2341                 touch_up_dirs(dir_flist, -1);
2342
2343         if (DEBUG_GTE(GENR, 1))
2344                 rprintf(FINFO, "generate_files finished\n");
2345 }