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) 2003-2007 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
  25 extern int verbose;
  26 extern int dry_run;
  27 extern int do_xfers;
  28 extern int stdout_format_has_i;
  29 extern int logfile_format_has_i;
  30 extern int am_root;
  31 extern int am_server;
  32 extern int am_daemon;
  33 extern int inc_recurse;
  34 extern int do_progress;
  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_perms;
  45 extern int preserve_times;
  46 extern int uid_ndx;
  47 extern int gid_ndx;
  48 extern int delete_mode;
  49 extern int delete_before;
  50 extern int delete_during;
  51 extern int delete_after;
  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 ignore_existing;
  58 extern int ignore_non_existing;
  59 extern int inplace;
  60 extern int append_mode;
  61 extern int make_backups;
  62 extern int csum_length;
  63 extern int ignore_times;
  64 extern int size_only;
  65 extern OFF_T max_size;
  66 extern OFF_T min_size;
  67 extern int io_error;
  68 extern int flist_eof;
  69 extern int allowed_lull;
  70 extern int sock_f_out;
  71 extern int ignore_timeout;
  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 char *basis_dir[];
  79 extern int compare_dest;
  80 extern int copy_dest;
  81 extern int link_dest;
  82 extern int whole_file;
  83 extern int list_only;
  84 extern int read_batch;
  85 extern int safe_symlinks;
  86 extern long block_size; /* "long" because popt can't set an int32. */
  87 extern int max_delete;
  88 extern int force_delete;
  89 extern int one_file_system;
  90 extern struct stats stats;
  91 extern dev_t filesystem_dev;
  92 extern mode_t orig_umask;
  93 extern char *backup_dir;
  94 extern char *backup_suffix;
  95 extern int backup_suffix_len;
  96 extern struct file_list *cur_flist, *first_flist, *dir_flist;
  97 extern struct filter_list_struct server_filter_list;
  98 #ifdef ICONV_OPTION
  99 extern int ic_ndx;
 100 #endif
 101
 102 int ignore_perishable = 0;
 103 int non_perishable_cnt = 0;
 104 int maybe_ATTRS_REPORT = 0;
 105
 106 static dev_t dev_zero;
 107 static int deletion_count = 0; /* used to implement --max-delete */
 108 static int deldelay_size = 0, deldelay_cnt = 0;
 109 static char *deldelay_buf = NULL;
 110 static int deldelay_fd = -1;
 111 static int lull_mod;
 112 static int dir_tweaking;
 113 static int need_retouch_dir_times;
 114 static int need_retouch_dir_perms;
 115 static const char *solo_file = NULL;
 116
 117 /* For calling delete_item() and delete_dir_contents(). */
 118 #define DEL_RECURSE             (1<<1) /* recurse */
 119 #define DEL_DIR_IS_EMPTY        (1<<2) /* internal delete_FUNCTIONS use only */
 120
 121 enum nonregtype {
 122     TYPE_DIR, TYPE_SPECIAL, TYPE_DEVICE, TYPE_SYMLINK
 123 };
 124
 125 enum delret {
 126     DR_SUCCESS = 0, DR_FAILURE, DR_AT_LIMIT, DR_NOT_EMPTY
 127 };
 128
 129 /* Forward declaration for delete_item(). */
 130 static enum delret delete_dir_contents(char *fname, int flags);
 131
 132
 133 static int is_backup_file(char *fn)
 134 {
 135         int k = strlen(fn) - backup_suffix_len;
 136         return k > 0 && strcmp(fn+k, backup_suffix) == 0;
 137 }
 138
 139 /* Delete a file or directory.  If DEL_RECURSE is set in the flags, this will
 140  * delete recursively.
 141  *
 142  * Note that fbuf must point to a MAXPATHLEN buffer if the mode indicates it's
 143  * a directory! (The buffer is used for recursion, but returned unchanged.)
 144  */
 145 static enum delret delete_item(char *fbuf, int mode, char *replace, int flags)
 146 {
 147         enum delret ret;
 148         char *what;
 149         int ok;
 150
 151         if (verbose > 2) {
 152                 rprintf(FINFO, "delete_item(%s) mode=%o flags=%d\n",
 153                         fbuf, mode, flags);
 154         }
 155
 156         if (S_ISDIR(mode) && !(flags & DEL_DIR_IS_EMPTY)) {
 157                 ignore_perishable = 1;
 158                 /* If DEL_RECURSE is not set, this just reports emptiness. */
 159                 ret = delete_dir_contents(fbuf, flags);
 160                 ignore_perishable = 0;
 161                 if (ret == DR_NOT_EMPTY || ret == DR_AT_LIMIT)
 162                         goto check_ret;
 163                 /* OK: try to delete the directory. */
 164         }
 165
 166         if (!replace && max_delete >= 0 && ++deletion_count > max_delete)
 167                 return DR_AT_LIMIT;
 168
 169         if (S_ISDIR(mode)) {
 170                 what = "rmdir";
 171                 ok = do_rmdir(fbuf) == 0;
 172         } else if (make_backups > 0 && (backup_dir || !is_backup_file(fbuf))) {
 173                 what = "make_backup";
 174                 ok = make_backup(fbuf);
 175         } else {
 176                 what = "unlink";
 177                 ok = robust_unlink(fbuf) == 0;
 178         }
 179
 180         if (ok) {
 181                 if (!replace)
 182                         log_delete(fbuf, mode);
 183                 ret = DR_SUCCESS;
 184         } else {
 185                 if (S_ISDIR(mode) && errno == ENOTEMPTY) {
 186                         rprintf(FINFO, "cannot delete non-empty directory: %s\n",
 187                                 fbuf);
 188                         ret = DR_NOT_EMPTY;
 189                 } else if (errno != ENOENT) {
 190                         rsyserr(FERROR, errno, "delete_file: %s(%s) failed",
 191                                 what, fbuf);
 192                         ret = DR_FAILURE;
 193                 } else {
 194                         deletion_count--;
 195                         ret = DR_SUCCESS;
 196                 }
 197         }
 198
 199   check_ret:
 200         if (replace && ret != DR_SUCCESS) {
 201                 rprintf(FERROR, "could not make way for new %s: %s\n",
 202                         replace, fbuf);
 203         }
 204         return ret;
 205 }
 206
 207 /* The directory is about to be deleted: if DEL_RECURSE is given, delete all
 208  * its contents, otherwise just checks for content.  Returns DR_SUCCESS or
 209  * DR_NOT_EMPTY.  Note that fname must point to a MAXPATHLEN buffer!  (The
 210  * buffer is used for recursion, but returned unchanged.)
 211  */
 212 static enum delret delete_dir_contents(char *fname, int flags)
 213 {
 214         struct file_list *dirlist;
 215         enum delret ret;
 216         unsigned remainder;
 217         void *save_filters;
 218         int j, dlen;
 219         char *p;
 220
 221         if (verbose > 3) {
 222                 rprintf(FINFO, "delete_dir_contents(%s) flags=%d\n",
 223                         fname, flags);
 224         }
 225
 226         dlen = strlen(fname);
 227         save_filters = push_local_filters(fname, dlen);
 228
 229         non_perishable_cnt = 0;
 230         dirlist = get_dirlist(fname, dlen, 0);
 231         ret = non_perishable_cnt ? DR_NOT_EMPTY : DR_SUCCESS;
 232
 233         if (!dirlist->used)
 234                 goto done;
 235
 236         if (!(flags & DEL_RECURSE)) {
 237                 ret = DR_NOT_EMPTY;
 238                 goto done;
 239         }
 240
 241         p = fname + dlen;
 242         if (dlen != 1 || *fname != '/')
 243                 *p++ = '/';
 244         remainder = MAXPATHLEN - (p - fname);
 245
 246         /* We do our own recursion, so make delete_item() non-recursive. */
 247         flags = (flags & ~DEL_RECURSE) | DEL_DIR_IS_EMPTY;
 248
 249         for (j = dirlist->used; j--; ) {
 250                 struct file_struct *fp = dirlist->files[j];
 251
 252                 if (fp->flags & FLAG_MOUNT_DIR) {
 253                         if (verbose > 1) {
 254                                 rprintf(FINFO,
 255                                     "mount point, %s, pins parent directory\n",
 256                                     f_name(fp, NULL));
 257                         }
 258                         ret = DR_NOT_EMPTY;
 259                         continue;
 260                 }
 261
 262                 strlcpy(p, fp->basename, remainder);
 263                 /* Save stack by recursing to ourself directly. */
 264                 if (S_ISDIR(fp->mode)
 265                  && delete_dir_contents(fname, flags | DEL_RECURSE) != DR_SUCCESS)
 266                         ret = DR_NOT_EMPTY;
 267                 if (delete_item(fname, fp->mode, NULL, flags) != DR_SUCCESS)
 268                         ret = DR_NOT_EMPTY;
 269         }
 270
 271         fname[dlen] = '\0';
 272
 273   done:
 274         flist_free(dirlist);
 275         pop_local_filters(save_filters);
 276
 277         if (ret == DR_NOT_EMPTY) {
 278                 rprintf(FINFO, "cannot delete non-empty directory: %s\n",
 279                         fname);
 280         }
 281         return ret;
 282 }
 283
 284 static int start_delete_delay_temp(void)
 285 {
 286         char fnametmp[MAXPATHLEN];
 287         int save_dry_run = dry_run;
 288
 289         dry_run = 0;
 290         if (!get_tmpname(fnametmp, "deldelay")
 291          || (deldelay_fd = do_mkstemp(fnametmp, 0600)) < 0) {
 292                 rprintf(FINFO, "NOTE: Unable to create delete-delay temp file%s.\n",
 293                         inc_recurse ? "" : " -- switching to --delete-after");
 294                 delete_during = 0;
 295                 delete_after = !inc_recurse;
 296                 dry_run = save_dry_run;
 297                 return 0;
 298         }
 299         unlink(fnametmp);
 300         dry_run = save_dry_run;
 301         return 1;
 302 }
 303
 304 static int flush_delete_delay(void)
 305 {
 306         if (write(deldelay_fd, deldelay_buf, deldelay_cnt) != deldelay_cnt) {
 307                 rsyserr(FERROR, errno, "flush of delete-delay buffer");
 308                 delete_during = 0;
 309                 delete_after = 1;
 310                 close(deldelay_fd);
 311                 return 0;
 312         }
 313         deldelay_cnt = 0;
 314         return 1;
 315 }
 316
 317 static int remember_delete(struct file_struct *file, const char *fname)
 318 {
 319         int len;
 320
 321         while (1) {
 322                 len = snprintf(deldelay_buf + deldelay_cnt,
 323                                deldelay_size - deldelay_cnt,
 324                                "%x %s%c", (int)file->mode, fname, '\0');
 325                 if ((deldelay_cnt += len) <= deldelay_size)
 326                         break;
 327                 if (deldelay_fd < 0 && !start_delete_delay_temp())
 328                         return 0;
 329                 deldelay_cnt -= len;
 330                 if (!flush_delete_delay())
 331                         return 0;
 332         }
 333
 334         return 1;
 335 }
 336
 337 static int read_delay_line(char *buf)
 338 {
 339         static int read_pos = 0;
 340         int j, len, mode;
 341         char *bp, *past_space;
 342
 343         while (1) {
 344                 for (j = read_pos; j < deldelay_cnt && deldelay_buf[j]; j++) {}
 345                 if (j < deldelay_cnt)
 346                         break;
 347                 if (deldelay_fd < 0) {
 348                         if (j > read_pos)
 349                                 goto invalid_data;
 350                         return -1;
 351                 }
 352                 deldelay_cnt -= read_pos;
 353                 if (deldelay_cnt == deldelay_size)
 354                         goto invalid_data;
 355                 if (deldelay_cnt && read_pos) {
 356                         memmove(deldelay_buf, deldelay_buf + read_pos,
 357                                 deldelay_cnt);
 358                 }
 359                 len = read(deldelay_fd, deldelay_buf + deldelay_cnt,
 360                            deldelay_size - deldelay_cnt);
 361                 if (len == 0) {
 362                         if (deldelay_cnt) {
 363                                 rprintf(FERROR,
 364                                     "ERROR: unexpected EOF in delete-delay file.\n");
 365                         }
 366                         return -1;
 367                 }
 368                 if (len < 0) {
 369                         rsyserr(FERROR, errno,
 370                                 "reading delete-delay file");
 371                         return -1;
 372                 }
 373                 deldelay_cnt += len;
 374                 read_pos = 0;
 375         }
 376
 377         bp = deldelay_buf + read_pos;
 378
 379         if (sscanf(bp, "%x ", &mode) != 1) {
 380           invalid_data:
 381                 rprintf(FERROR, "ERROR: invalid data in delete-delay file.\n");
 382                 return -1;
 383         }
 384         past_space = strchr(bp, ' ') + 1;
 385         len = j - read_pos - (past_space - bp) + 1; /* count the '\0' */
 386         read_pos = j + 1;
 387
 388         if (len > MAXPATHLEN) {
 389                 rprintf(FERROR, "ERROR: filename too long in delete-delay file.\n");
 390                 return -1;
 391         }
 392
 393         /* The caller needs the name in a MAXPATHLEN buffer, so we copy it
 394          * instead of returning a pointer to our buffer. */
 395         memcpy(buf, past_space, len);
 396
 397         return mode;
 398 }
 399
 400 static void do_delayed_deletions(char *delbuf)
 401 {
 402         int mode;
 403
 404         if (deldelay_fd >= 0) {
 405                 if (deldelay_cnt && !flush_delete_delay())
 406                         return;
 407                 lseek(deldelay_fd, 0, 0);
 408         }
 409         while ((mode = read_delay_line(delbuf)) >= 0)
 410                 delete_item(delbuf, mode, NULL, DEL_RECURSE);
 411         if (deldelay_fd >= 0)
 412                 close(deldelay_fd);
 413 }
 414
 415 /* This function is used to implement per-directory deletion, and is used by
 416  * all the --delete-WHEN options.  Note that the fbuf pointer must point to a
 417  * MAXPATHLEN buffer with the name of the directory in it (the functions we
 418  * call will append names onto the end, but the old dir value will be restored
 419  * on exit). */
 420 static void delete_in_dir(char *fbuf, struct file_struct *file, dev_t *fs_dev)
 421 {
 422         static int already_warned = 0;
 423         struct file_list *dirlist;
 424         char delbuf[MAXPATHLEN];
 425         int dlen, i;
 426
 427         if (!fbuf) {
 428                 change_local_filter_dir(NULL, 0, 0);
 429                 return;
 430         }
 431
 432         if (verbose > 2)
 433                 rprintf(FINFO, "delete_in_dir(%s)\n", fbuf);
 434
 435         if (allowed_lull)
 436                 maybe_send_keepalive();
 437
 438         if (io_error && !ignore_errors) {
 439                 if (already_warned)
 440                         return;
 441                 rprintf(FINFO,
 442                         "IO error encountered -- skipping file deletion\n");
 443                 already_warned = 1;
 444                 return;
 445         }
 446
 447         dlen = strlen(fbuf);
 448         change_local_filter_dir(fbuf, dlen, F_DEPTH(file));
 449
 450         if (one_file_system) {
 451                 if (file->flags & FLAG_TOP_DIR)
 452                         filesystem_dev = *fs_dev;
 453                 else if (filesystem_dev != *fs_dev)
 454                         return;
 455         }
 456
 457         dirlist = get_dirlist(fbuf, dlen, 0);
 458
 459         /* If an item in dirlist is not found in flist, delete it
 460          * from the filesystem. */
 461         for (i = dirlist->used; i--; ) {
 462                 struct file_struct *fp = dirlist->files[i];
 463                 if (!F_IS_ACTIVE(fp))
 464                         continue;
 465                 if (fp->flags & FLAG_MOUNT_DIR) {
 466                         if (verbose > 1)
 467                                 rprintf(FINFO, "cannot delete mount point: %s\n",
 468                                         f_name(fp, NULL));
 469                         continue;
 470                 }
 471                 if (flist_find(cur_flist, fp) < 0) {
 472                         f_name(fp, delbuf);
 473                         if (delete_during == 2) {
 474                                 if (!remember_delete(fp, delbuf))
 475                                         break;
 476                         } else
 477                                 delete_item(delbuf, fp->mode, NULL, DEL_RECURSE);
 478                 }
 479         }
 480
 481         flist_free(dirlist);
 482 }
 483
 484 /* This deletes any files on the receiving side that are not present on the
 485  * sending side.  This is used by --delete-before and --delete-after. */
 486 static void do_delete_pass(void)
 487 {
 488         char fbuf[MAXPATHLEN];
 489         STRUCT_STAT st;
 490         int j;
 491
 492         /* dry_run is incremented when the destination doesn't exist yet. */
 493         if (dry_run > 1 || list_only)
 494                 return;
 495
 496         for (j = 0; j < cur_flist->used; j++) {
 497                 struct file_struct *file = cur_flist->sorted[j];
 498
 499                 if (!(file->flags & FLAG_CONTENT_DIR))
 500                         continue;
 501
 502                 f_name(file, fbuf);
 503                 if (verbose > 1 && file->flags & FLAG_TOP_DIR)
 504                         rprintf(FINFO, "deleting in %s\n", fbuf);
 505
 506                 if (link_stat(fbuf, &st, keep_dirlinks) < 0
 507                  || !S_ISDIR(st.st_mode))
 508                         continue;
 509
 510                 delete_in_dir(fbuf, file, &st.st_dev);
 511         }
 512         delete_in_dir(NULL, NULL, &dev_zero);
 513
 514         if (do_progress && !am_server)
 515                 rprintf(FINFO, "                    \r");
 516 }
 517
 518 int unchanged_attrs(const char *fname, struct file_struct *file, stat_x *sxp)
 519 {
 520         if (preserve_perms && !BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
 521                 return 0;
 522
 523         if (am_root && uid_ndx && sxp->st.st_uid != (uid_t)F_OWNER(file))
 524                 return 0;
 525
 526         if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP) && sxp->st.st_gid != (gid_t)F_GROUP(file))
 527                 return 0;
 528
 529 #ifdef SUPPORT_ACLS
 530         if (preserve_acls && !S_ISLNK(file->mode)) {
 531                 if (!ACL_READY(*sxp))
 532                         get_acl(fname, sxp);
 533                 if (set_acl(NULL, file, sxp) == 0)
 534                         return 0;
 535         }
 536 #endif
 537 #ifdef SUPPORT_XATTRS
 538         if (preserve_xattrs) {
 539                 if (!XATTR_READY(*sxp))
 540                         get_xattr(fname, sxp);
 541                 if (xattr_diff(file, sxp, 0))
 542                         return 0;
 543         }
 544 #endif
 545
 546         return 1;
 547 }
 548
 549 void itemize(const char *fnamecmp, struct file_struct *file, int ndx, int statret,
 550              stat_x *sxp, int32 iflags, uchar fnamecmp_type,
 551              const char *xname)
 552 {
 553         if (statret >= 0) { /* A from-dest-dir statret can == 1! */
 554                 int keep_time = !preserve_times ? 0
 555                     : S_ISDIR(file->mode) ? preserve_times > 1
 556                     : !S_ISLNK(file->mode);
 557
 558                 if (S_ISREG(file->mode) && F_LENGTH(file) != sxp->st.st_size)
 559                         iflags |= ITEM_REPORT_SIZE;
 560                 if ((iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !keep_time
 561                   && !(iflags & ITEM_MATCHED)
 562                   && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
 563                  || (keep_time && cmp_time(file->modtime, sxp->st.st_mtime) != 0))
 564                         iflags |= ITEM_REPORT_TIME;
 565 #ifndef HAVE_LCHMOD
 566                 if (S_ISLNK(file->mode)) {
 567                         ;
 568                 } else
 569 #endif
 570                 if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
 571                         iflags |= ITEM_REPORT_PERMS;
 572                 if (uid_ndx && am_root && (uid_t)F_OWNER(file) != sxp->st.st_uid)
 573                         iflags |= ITEM_REPORT_OWNER;
 574                 if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP)
 575                     && sxp->st.st_gid != (gid_t)F_GROUP(file))
 576                         iflags |= ITEM_REPORT_GROUP;
 577 #ifdef SUPPORT_ACLS
 578                 if (preserve_acls && !S_ISLNK(file->mode)) {
 579                         if (!ACL_READY(*sxp))
 580                                 get_acl(fnamecmp, sxp);
 581                         if (set_acl(NULL, file, sxp) == 0)
 582                                 iflags |= ITEM_REPORT_ACL;
 583                 }
 584 #endif
 585 #ifdef SUPPORT_XATTRS
 586                 if (preserve_xattrs) {
 587                         if (!XATTR_READY(*sxp))
 588                                 get_xattr(fnamecmp, sxp);
 589                         if (xattr_diff(file, sxp, 1))
 590                                 iflags |= ITEM_REPORT_XATTR;
 591                 }
 592 #endif
 593         } else {
 594 #ifdef SUPPORT_XATTRS
 595                 if (preserve_xattrs && xattr_diff(file, NULL, 1))
 596                         iflags |= ITEM_REPORT_XATTR;
 597 #endif
 598                 iflags |= ITEM_IS_NEW;
 599         }
 600
 601         iflags &= 0xffff;
 602         if ((iflags & (SIGNIFICANT_ITEM_FLAGS|ITEM_REPORT_XATTR) || verbose > 1
 603           || stdout_format_has_i > 1 || (xname && *xname)) && !read_batch) {
 604                 if (protocol_version >= 29) {
 605                         if (ndx >= 0)
 606                                 write_ndx(sock_f_out, ndx);
 607                         write_shortint(sock_f_out, iflags);
 608                         if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
 609                                 write_byte(sock_f_out, fnamecmp_type);
 610                         if (iflags & ITEM_XNAME_FOLLOWS)
 611                                 write_vstring(sock_f_out, xname, strlen(xname));
 612 #ifdef SUPPORT_XATTRS
 613                         if (iflags & ITEM_REPORT_XATTR && !dry_run)
 614                                 send_xattr_request(NULL, file, sock_f_out);
 615 #endif
 616                 } else if (ndx >= 0) {
 617                         enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
 618                         log_item(code, file, &stats, iflags, xname);
 619                 }
 620         }
 621 }
 622
 623
 624 /* Perform our quick-check heuristic for determining if a file is unchanged. */
 625 int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
 626 {
 627         if (st->st_size != F_LENGTH(file))
 628                 return 0;
 629
 630         /* if always checksum is set then we use the checksum instead
 631            of the file time to determine whether to sync */
 632         if (always_checksum > 0 && S_ISREG(st->st_mode)) {
 633                 char sum[MAX_DIGEST_LEN];
 634                 file_checksum(fn, sum, st->st_size);
 635                 return memcmp(sum, F_SUM(file), checksum_len) == 0;
 636         }
 637
 638         if (size_only > 0)
 639                 return 1;
 640
 641         if (ignore_times)
 642                 return 0;
 643
 644         return cmp_time(st->st_mtime, file->modtime) == 0;
 645 }
 646
 647
 648 /*
 649  * set (initialize) the size entries in the per-file sum_struct
 650  * calculating dynamic block and checksum sizes.
 651  *
 652  * This is only called from generate_and_send_sums() but is a separate
 653  * function to encapsulate the logic.
 654  *
 655  * The block size is a rounded square root of file length.
 656  *
 657  * The checksum size is determined according to:
 658  *     blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
 659  * provided by Donovan Baarda which gives a probability of rsync
 660  * algorithm corrupting data and falling back using the whole md4
 661  * checksums.
 662  *
 663  * This might be made one of several selectable heuristics.
 664  */
 665 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
 666 {
 667         int32 blength;
 668         int s2length;
 669
 670         if (block_size)
 671                 blength = block_size;
 672         else if (len <= BLOCK_SIZE * BLOCK_SIZE)
 673                 blength = BLOCK_SIZE;
 674         else {
 675                 int32 c;
 676                 int64 l;
 677                 int cnt;
 678                 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
 679                 if (cnt >= 31 || c >= MAX_BLOCK_SIZE)
 680                         blength = MAX_BLOCK_SIZE;
 681                 else {
 682                     blength = 0;
 683                     do {
 684                             blength |= c;
 685                             if (len < (int64)blength * blength)
 686                                     blength &= ~c;
 687                             c >>= 1;
 688                     } while (c >= 8);   /* round to multiple of 8 */
 689                     blength = MAX(blength, BLOCK_SIZE);
 690                 }
 691         }
 692
 693         if (protocol_version < 27) {
 694                 s2length = csum_length;
 695         } else if (csum_length == SUM_LENGTH) {
 696                 s2length = SUM_LENGTH;
 697         } else {
 698                 int32 c;
 699                 int64 l;
 700                 int b = BLOCKSUM_BIAS;
 701                 for (l = len; l >>= 1; b += 2) {}
 702                 for (c = blength; (c >>= 1) && b; b--) {}
 703                 /* add a bit, subtract rollsum, round up. */
 704                 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
 705                 s2length = MAX(s2length, csum_length);
 706                 s2length = MIN(s2length, SUM_LENGTH);
 707         }
 708
 709         sum->flength    = len;
 710         sum->blength    = blength;
 711         sum->s2length   = s2length;
 712         sum->remainder  = (int32)(len % blength);
 713         sum->count      = (int32)(len / blength) + (sum->remainder != 0);
 714
 715         if (sum->count && verbose > 2) {
 716                 rprintf(FINFO,
 717                         "count=%.0f rem=%ld blength=%ld s2length=%d flength=%.0f\n",
 718                         (double)sum->count, (long)sum->remainder, (long)sum->blength,
 719                         sum->s2length, (double)sum->flength);
 720         }
 721 }
 722
 723
 724 /*
 725  * Generate and send a stream of signatures/checksums that describe a buffer
 726  *
 727  * Generate approximately one checksum every block_len bytes.
 728  */
 729 static void generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
 730 {
 731         int32 i;
 732         struct map_struct *mapbuf;
 733         struct sum_struct sum;
 734         OFF_T offset = 0;
 735
 736         sum_sizes_sqroot(&sum, len);
 737         write_sum_head(f_out, &sum);
 738
 739         if (append_mode > 0 && f_copy < 0)
 740                 return;
 741
 742         if (len > 0)
 743                 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
 744         else
 745                 mapbuf = NULL;
 746
 747         for (i = 0; i < sum.count; i++) {
 748                 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
 749                 char *map = map_ptr(mapbuf, offset, n1);
 750                 char sum2[SUM_LENGTH];
 751                 uint32 sum1;
 752
 753                 len -= n1;
 754                 offset += n1;
 755
 756                 if (f_copy >= 0) {
 757                         full_write(f_copy, map, n1);
 758                         if (append_mode > 0)
 759                                 continue;
 760                 }
 761
 762                 sum1 = get_checksum1(map, n1);
 763                 get_checksum2(map, n1, sum2);
 764
 765                 if (verbose > 3) {
 766                         rprintf(FINFO,
 767                                 "chunk[%.0f] offset=%.0f len=%ld sum1=%08lx\n",
 768                                 (double)i, (double)offset - n1, (long)n1,
 769                                 (unsigned long)sum1);
 770                 }
 771                 write_int(f_out, sum1);
 772                 write_buf(f_out, sum2, sum.s2length);
 773         }
 774
 775         if (mapbuf)
 776                 unmap_file(mapbuf);
 777 }
 778
 779
 780 /* Try to find a filename in the same dir as "fname" with a similar name. */
 781 static int find_fuzzy(struct file_struct *file, struct file_list *dirlist)
 782 {
 783         int fname_len, fname_suf_len;
 784         const char *fname_suf, *fname = file->basename;
 785         uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
 786         int j, lowest_j = -1;
 787
 788         fname_len = strlen(fname);
 789         fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
 790
 791         for (j = 0; j < dirlist->used; j++) {
 792                 struct file_struct *fp = dirlist->files[j];
 793                 const char *suf, *name;
 794                 int len, suf_len;
 795                 uint32 dist;
 796
 797                 if (!S_ISREG(fp->mode) || !F_LENGTH(fp)
 798                  || fp->flags & FLAG_FILE_SENT)
 799                         continue;
 800
 801                 name = fp->basename;
 802
 803                 if (F_LENGTH(fp) == F_LENGTH(file)
 804                     && cmp_time(fp->modtime, file->modtime) == 0) {
 805                         if (verbose > 4) {
 806                                 rprintf(FINFO,
 807                                         "fuzzy size/modtime match for %s\n",
 808                                         name);
 809                         }
 810                         return j;
 811                 }
 812
 813                 len = strlen(name);
 814                 suf = find_filename_suffix(name, len, &suf_len);
 815
 816                 dist = fuzzy_distance(name, len, fname, fname_len);
 817                 /* Add some extra weight to how well the suffixes match. */
 818                 dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len)
 819                       * 10;
 820                 if (verbose > 4) {
 821                         rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
 822                                 name, (int)(dist>>16), (int)(dist&0xFFFF));
 823                 }
 824                 if (dist <= lowest_dist) {
 825                         lowest_dist = dist;
 826                         lowest_j = j;
 827                 }
 828         }
 829
 830         return lowest_j;
 831 }
 832
 833 /* This is only called for regular files.  We return -2 if we've finished
 834  * handling the file, -1 if no dest-linking occurred, or a non-negative
 835  * value if we found an alternate basis file. */
 836 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
 837                          char *cmpbuf, stat_x *sxp, int itemizing,
 838                          enum logcode code)
 839 {
 840         int best_match = -1;
 841         int match_level = 0;
 842         int j = 0;
 843
 844         do {
 845                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 846                 if (link_stat(cmpbuf, &sxp->st, 0) < 0 || !S_ISREG(sxp->st.st_mode))
 847                         continue;
 848                 switch (match_level) {
 849                 case 0:
 850                         best_match = j;
 851                         match_level = 1;
 852                         /* FALL THROUGH */
 853                 case 1:
 854                         if (!unchanged_file(cmpbuf, file, &sxp->st))
 855                                 continue;
 856                         best_match = j;
 857                         match_level = 2;
 858                         /* FALL THROUGH */
 859                 case 2:
 860                         if (!unchanged_attrs(cmpbuf, file, sxp))
 861                                 continue;
 862                         if (always_checksum > 0 && preserve_times
 863                          && cmp_time(sxp->st.st_mtime, file->modtime))
 864                                 continue;
 865                         best_match = j;
 866                         match_level = 3;
 867                         break;
 868                 }
 869                 break;
 870         } while (basis_dir[++j] != NULL);
 871
 872         if (!match_level)
 873                 return -1;
 874
 875         if (j != best_match) {
 876                 j = best_match;
 877                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 878                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
 879                         return -1;
 880         }
 881
 882         if (match_level == 3 && !copy_dest) {
 883 #ifdef SUPPORT_HARD_LINKS
 884                 if (link_dest) {
 885                         if (!hard_link_one(file, fname, cmpbuf, 1))
 886                                 goto try_a_copy;
 887                         if (preserve_hard_links && F_IS_HLINKED(file))
 888                                 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, j);
 889                         if (itemizing && (verbose > 1 || stdout_format_has_i > 1)) {
 890                                 itemize(cmpbuf, file, ndx, 1, sxp,
 891                                         ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS,
 892                                         0, "");
 893                         }
 894                 } else
 895 #endif
 896                 if (itemizing)
 897                         itemize(cmpbuf, file, ndx, 0, sxp, 0, 0, NULL);
 898                 if (verbose > 1 && maybe_ATTRS_REPORT)
 899                         rprintf(FCLIENT, "%s is uptodate\n", fname);
 900                 return -2;
 901         }
 902
 903         if (match_level >= 2) {
 904 #ifdef SUPPORT_HARD_LINKS
 905           try_a_copy: /* Copy the file locally. */
 906 #endif
 907                 if (copy_file(cmpbuf, fname, file->mode, 0) < 0) {
 908                         if (verbose) {
 909                                 rsyserr(FINFO, errno, "copy_file %s => %s",
 910                                         full_fname(cmpbuf), fname);
 911                         }
 912                         return -1;
 913                 }
 914                 set_file_attrs(fname, file, NULL, cmpbuf, 0);
 915                 if (itemizing)
 916                         itemize(cmpbuf, file, ndx, 0, sxp, ITEM_LOCAL_CHANGE, 0, NULL);
 917 #ifdef SUPPORT_XATTRS
 918                 if (preserve_xattrs)
 919                         xattr_clear_locals(file);
 920 #endif
 921                 if (maybe_ATTRS_REPORT
 922                  && ((!itemizing && verbose && match_level == 2)
 923                   || (verbose > 1 && match_level == 3))) {
 924                         code = match_level == 3 ? FCLIENT : FINFO;
 925                         rprintf(code, "%s%s\n", fname,
 926                                 match_level == 3 ? " is uptodate" : "");
 927                 }
 928 #ifdef SUPPORT_HARD_LINKS
 929                 if (preserve_hard_links && F_IS_HLINKED(file))
 930                         finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, -1);
 931 #endif
 932                 return -2;
 933         }
 934
 935         return FNAMECMP_BASIS_DIR_LOW + j;
 936 }
 937
 938 /* This is only called for non-regular files.  We return -2 if we've finished
 939  * handling the file, or -1 if no dest-linking occurred, or a non-negative
 940  * value if we found an alternate basis file. */
 941 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
 942                          char *cmpbuf, stat_x *sxp, int itemizing,
 943                          enum logcode code)
 944 {
 945         char lnk[MAXPATHLEN];
 946         int best_match = -1;
 947         int match_level = 0;
 948         enum nonregtype type;
 949         uint32 *devp;
 950         int len, j = 0;
 951
 952 #ifndef SUPPORT_LINKS
 953         if (S_ISLNK(file->mode))
 954                 return -1;
 955 #endif
 956         if (S_ISDIR(file->mode)) {
 957                 type = TYPE_DIR;
 958         } else if (IS_SPECIAL(file->mode))
 959                 type = TYPE_SPECIAL;
 960         else if (IS_DEVICE(file->mode))
 961                 type = TYPE_DEVICE;
 962 #ifdef SUPPORT_LINKS
 963         else if (S_ISLNK(file->mode))
 964                 type = TYPE_SYMLINK;
 965 #endif
 966         else {
 967                 rprintf(FERROR,
 968                         "internal: try_dests_non() called with invalid mode (%o)\n",
 969                         (int)file->mode);
 970                 exit_cleanup(RERR_UNSUPPORTED);
 971         }
 972
 973         do {
 974                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 975                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
 976                         continue;
 977                 switch (type) {
 978                 case TYPE_DIR:
 979                         if (!S_ISDIR(sxp->st.st_mode))
 980                                 continue;
 981                         break;
 982                 case TYPE_SPECIAL:
 983                         if (!IS_SPECIAL(sxp->st.st_mode))
 984                                 continue;
 985                         break;
 986                 case TYPE_DEVICE:
 987                         if (!IS_DEVICE(sxp->st.st_mode))
 988                                 continue;
 989                         break;
 990 #ifdef SUPPORT_LINKS
 991                 case TYPE_SYMLINK:
 992                         if (!S_ISLNK(sxp->st.st_mode))
 993                                 continue;
 994                         break;
 995 #endif
 996                 }
 997                 if (match_level < 1) {
 998                         match_level = 1;
 999                         best_match = j;
1000                 }
1001                 switch (type) {
1002                 case TYPE_DIR:
1003                         break;
1004                 case TYPE_SPECIAL:
1005                 case TYPE_DEVICE:
1006                         devp = F_RDEV_P(file);
1007                         if (sxp->st.st_rdev != MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)))
1008                                 continue;
1009                         break;
1010 #ifdef SUPPORT_LINKS
1011                 case TYPE_SYMLINK:
1012                         if ((len = readlink(cmpbuf, lnk, MAXPATHLEN-1)) <= 0)
1013                                 continue;
1014                         lnk[len] = '\0';
1015                         if (strcmp(lnk, F_SYMLINK(file)) != 0)
1016                                 continue;
1017                         break;
1018 #endif
1019                 }
1020                 if (match_level < 2) {
1021                         match_level = 2;
1022                         best_match = j;
1023                 }
1024                 if (unchanged_attrs(cmpbuf, file, sxp)) {
1025                         match_level = 3;
1026                         best_match = j;
1027                         break;
1028                 }
1029         } while (basis_dir[++j] != NULL);
1030
1031         if (!match_level)
1032                 return -1;
1033
1034         if (j != best_match) {
1035                 j = best_match;
1036                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1037                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1038                         return -1;
1039         }
1040
1041         if (match_level == 3) {
1042 #ifdef SUPPORT_HARD_LINKS
1043                 if (link_dest
1044 #ifndef CAN_HARDLINK_SYMLINK
1045                  && !S_ISLNK(file->mode)
1046 #endif
1047 #ifndef CAN_HARDLINK_SPECIAL
1048                  && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
1049 #endif
1050                  && !S_ISDIR(file->mode)) {
1051                         if (do_link(cmpbuf, fname) < 0) {
1052                                 rsyserr(FERROR, errno,
1053                                         "failed to hard-link %s with %s",
1054                                         cmpbuf, fname);
1055                                 return j;
1056                         }
1057                         if (preserve_hard_links && F_IS_HLINKED(file))
1058                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1059                 } else
1060 #endif
1061                         match_level = 2;
1062                 if (itemizing && stdout_format_has_i
1063                  && (verbose > 1 || stdout_format_has_i > 1)) {
1064                         int chg = compare_dest && type != TYPE_DIR ? 0
1065                             : ITEM_LOCAL_CHANGE
1066                              + (match_level == 3 ? ITEM_XNAME_FOLLOWS : 0);
1067                         char *lp = match_level == 3 ? "" : NULL;
1068                         itemize(cmpbuf, file, ndx, 0, sxp, chg + ITEM_MATCHED, 0, lp);
1069                 }
1070                 if (verbose > 1 && maybe_ATTRS_REPORT) {
1071                         rprintf(FCLIENT, "%s%s is uptodate\n",
1072                                 fname, type == TYPE_DIR ? "/" : "");
1073                 }
1074                 return -2;
1075         }
1076
1077         return j;
1078 }
1079
1080 static void list_file_entry(struct file_struct *f)
1081 {
1082         char permbuf[PERMSTRING_SIZE];
1083         double len;
1084
1085         if (!F_IS_ACTIVE(f)) {
1086                 /* this can happen if duplicate names were removed */
1087                 return;
1088         }
1089
1090         permstring(permbuf, f->mode);
1091         len = F_LENGTH(f);
1092
1093         /* TODO: indicate '+' if the entry has an ACL. */
1094
1095 #ifdef SUPPORT_LINKS
1096         if (preserve_links && S_ISLNK(f->mode)) {
1097                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
1098                         permbuf, len, timestring(f->modtime),
1099                         f_name(f, NULL), F_SYMLINK(f));
1100         } else
1101 #endif
1102         {
1103                 rprintf(FINFO, "%s %11.0f %s %s\n",
1104                         permbuf, len, timestring(f->modtime),
1105                         f_name(f, NULL));
1106         }
1107 }
1108
1109 static int phase = 0;
1110 static int dflt_perms;
1111
1112 /* Acts on the indicated item in cur_flist whose name is fname.  If a dir,
1113  * make sure it exists, and has the right permissions/timestamp info.  For
1114  * all other non-regular files (symlinks, etc.) we create them here.  For
1115  * regular files that have changed, we try to find a basis file and then
1116  * start sending checksums.  The ndx is the file's unique index value.
1117  *
1118  * When fname is non-null, it must point to a MAXPATHLEN buffer!
1119  *
1120  * Note that f_out is set to -1 when doing final directory-permission and
1121  * modification-time repair. */
1122 static void recv_generator(char *fname, struct file_struct *file, int ndx,
1123                            int itemizing, enum logcode code, int f_out)
1124 {
1125         static int missing_below = -1, excluded_below = -1;
1126         static const char *parent_dirname = "";
1127         static struct file_struct *missing_dir = NULL, *excluded_dir = NULL;
1128         static struct file_list *fuzzy_dirlist = NULL;
1129         static int need_fuzzy_dirlist = 0;
1130         struct file_struct *fuzzy_file = NULL;
1131         int fd = -1, f_copy = -1;
1132         stat_x sx, real_sx;
1133         STRUCT_STAT partial_st;
1134         struct file_struct *back_file = NULL;
1135         int statret, real_ret, stat_errno;
1136         char *fnamecmp, *partialptr, *backupptr = NULL;
1137         char fnamecmpbuf[MAXPATHLEN];
1138         uchar fnamecmp_type;
1139         int implied_dirs_are_missing = relative_paths && !implied_dirs && protocol_version < 30;
1140         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1141
1142         if (verbose > 2)
1143                 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
1144
1145         if (list_only) {
1146                 if (S_ISDIR(file->mode)
1147                  && ((!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
1148                   || (inc_recurse && ndx != cur_flist->ndx_start - 1)))
1149                         return;
1150                 list_file_entry(file);
1151                 return;
1152         }
1153
1154         if (server_filter_list.head) {
1155                 if (excluded_below >= 0) {
1156                         if (F_DEPTH(file) > excluded_below
1157                          && (!implied_dirs_are_missing || f_name_has_prefix(file, excluded_dir)))
1158                                 goto skipping;
1159                         excluded_below = -1;
1160                 }
1161                 if (check_filter(&server_filter_list, fname,
1162                                  S_ISDIR(file->mode)) < 0) {
1163                         if (S_ISDIR(file->mode)) {
1164                                 excluded_below = F_DEPTH(file);
1165                                 excluded_dir = file;
1166                         }
1167                   skipping:
1168                         if (verbose) {
1169                                 rprintf(FINFO,
1170                                         "skipping server-excluded file \"%s\"\n",
1171                                         fname);
1172                         }
1173                         return;
1174                 }
1175         }
1176
1177         if (missing_below >= 0) {
1178                 if (F_DEPTH(file) <= missing_below
1179                  || (implied_dirs_are_missing && !f_name_has_prefix(file, missing_dir))) {
1180                         if (dry_run)
1181                                 dry_run--;
1182                         missing_below = -1;
1183                 } else if (!dry_run) {
1184                         if (S_ISDIR(file->mode))
1185                                 file->flags |= FLAG_MISSING_DIR;
1186                         return;
1187                 }
1188         }
1189 #ifdef SUPPORT_ACLS
1190         sx.acc_acl = sx.def_acl = NULL;
1191 #endif
1192 #ifdef SUPPORT_XATTRS
1193         sx.xattr = NULL;
1194 #endif
1195         if (dry_run > 1) {
1196                 if (fuzzy_dirlist) {
1197                         flist_free(fuzzy_dirlist);
1198                         fuzzy_dirlist = NULL;
1199                 }
1200                 parent_dirname = "";
1201                 statret = -1;
1202                 stat_errno = ENOENT;
1203         } else {
1204                 const char *dn = file->dirname ? file->dirname : ".";
1205                 if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
1206                         if (relative_paths && !implied_dirs
1207                          && do_stat(dn, &sx.st) < 0
1208                          && create_directory_path(fname) < 0) {
1209                                 rsyserr(FERROR, errno,
1210                                         "recv_generator: mkdir %s failed",
1211                                         full_fname(dn));
1212                         }
1213                         if (fuzzy_dirlist) {
1214                                 flist_free(fuzzy_dirlist);
1215                                 fuzzy_dirlist = NULL;
1216                         }
1217                         if (fuzzy_basis)
1218                                 need_fuzzy_dirlist = 1;
1219 #ifdef SUPPORT_ACLS
1220                         if (!preserve_perms)
1221                                 dflt_perms = default_perms_for_dir(dn);
1222 #endif
1223                 }
1224                 parent_dirname = dn;
1225
1226                 if (need_fuzzy_dirlist && S_ISREG(file->mode)) {
1227                         strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf);
1228                         fuzzy_dirlist = get_dirlist(fnamecmpbuf, -1, 1);
1229                         need_fuzzy_dirlist = 0;
1230                 }
1231
1232                 statret = link_stat(fname, &sx.st,
1233                                     keep_dirlinks && S_ISDIR(file->mode));
1234                 stat_errno = errno;
1235         }
1236
1237         if (ignore_non_existing > 0 && statret == -1 && stat_errno == ENOENT) {
1238                 if (verbose > 1) {
1239                         rprintf(FINFO, "not creating new %s \"%s\"\n",
1240                                 S_ISDIR(file->mode) ? "directory" : "file",
1241                                 fname);
1242                 }
1243                 if (S_ISDIR(file->mode)) {
1244                         if (missing_below < 0) {
1245                                 if (dry_run)
1246                                         dry_run++;
1247                                 missing_below = F_DEPTH(file);
1248                                 missing_dir = file;
1249                         }
1250                         file->flags |= FLAG_MISSING_DIR;
1251                 }
1252                 return;
1253         }
1254
1255         if (S_ISDIR(file->mode)) {
1256                 if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
1257                         goto cleanup;
1258                 if (inc_recurse && ndx != cur_flist->ndx_start - 1) {
1259                         /* In inc_recurse mode we want to make sure any missing
1260                          * directories get created while we're still processing
1261                          * the parent dir (which allows us to touch the parent
1262                          * dir's mtime right away).  We will handle the dir in
1263                          * full later (right before we handle its contents). */
1264                         if (statret == 0
1265                          && (S_ISDIR(sx.st.st_mode)
1266                           || delete_item(fname, sx.st.st_mode, "directory", del_opts) != 0))
1267                                 goto cleanup; /* Any errors get reported later. */
1268                         if (do_mkdir(fname, file->mode & 0700) == 0)
1269                                 file->flags |= FLAG_DIR_CREATED;
1270                         goto cleanup;
1271                 }
1272                 /* The file to be received is a directory, so we need
1273                  * to prepare appropriately.  If there is already a
1274                  * file of that name and it is *not* a directory, then
1275                  * we need to delete it.  If it doesn't exist, then
1276                  * (perhaps recursively) create it. */
1277                 if (statret == 0 && !S_ISDIR(sx.st.st_mode)) {
1278                         if (delete_item(fname, sx.st.st_mode, "directory", del_opts) != 0)
1279                                 goto skipping_dir_contents;
1280                         statret = -1;
1281                 }
1282                 if (dry_run && statret != 0 && missing_below < 0) {
1283                         missing_below = F_DEPTH(file);
1284                         missing_dir = file;
1285                         dry_run++;
1286                 }
1287                 real_ret = statret;
1288                 real_sx = sx;
1289                 if (file->flags & FLAG_DIR_CREATED)
1290                         statret = -1;
1291                 if (!preserve_perms) { /* See comment in non-dir code below. */
1292                         file->mode = dest_mode(file->mode, sx.st.st_mode,
1293                                                dflt_perms, statret == 0);
1294                 }
1295                 if (statret != 0 && basis_dir[0] != NULL) {
1296                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1297                                               itemizing, code);
1298                         if (j == -2) {
1299                                 itemizing = 0;
1300                                 code = FNONE;
1301                         } else if (j >= 0)
1302                                 statret = 1;
1303                 }
1304                 if (itemizing && f_out != -1) {
1305                         itemize(fname, file, ndx, statret, &sx,
1306                                 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
1307                 }
1308                 if (real_ret != 0 && do_mkdir(fname,file->mode) < 0 && errno != EEXIST) {
1309                         if (!relative_paths || errno != ENOENT
1310                             || create_directory_path(fname) < 0
1311                             || (do_mkdir(fname, file->mode) < 0 && errno != EEXIST)) {
1312                                 rsyserr(FERROR, errno,
1313                                         "recv_generator: mkdir %s failed",
1314                                         full_fname(fname));
1315                           skipping_dir_contents:
1316                                 rprintf(FERROR,
1317                                     "*** Skipping any contents from this failed directory ***\n");
1318                                 missing_below = F_DEPTH(file);
1319                                 missing_dir = file;
1320                                 file->flags |= FLAG_MISSING_DIR;
1321                                 goto cleanup;
1322                         }
1323                 }
1324                 if (set_file_attrs(fname, file, real_ret ? NULL : &real_sx, NULL, 0)
1325                     && verbose && code != FNONE && f_out != -1)
1326                         rprintf(code, "%s/\n", fname);
1327
1328                 /* We need to ensure that the dirs in the transfer have writable
1329                  * permissions during the time we are putting files within them.
1330                  * This is then fixed after the transfer is done. */
1331 #ifdef HAVE_CHMOD
1332                 if (!am_root && !(file->mode & S_IWUSR) && dir_tweaking) {
1333                         mode_t mode = file->mode | S_IWUSR;
1334                         if (do_chmod(fname, mode) < 0) {
1335                                 rsyserr(FERROR, errno,
1336                                         "failed to modify permissions on %s",
1337                                         full_fname(fname));
1338                         }
1339                         need_retouch_dir_perms = 1;
1340                 }
1341 #endif
1342
1343                 if (real_ret != 0 && one_file_system)
1344                         real_sx.st.st_dev = filesystem_dev;
1345                 if (inc_recurse) {
1346                         if (one_file_system) {
1347                                 uint32 *devp = F_DIR_DEV_P(file);
1348                                 DEV_MAJOR(devp) = major(real_sx.st.st_dev);
1349                                 DEV_MINOR(devp) = minor(real_sx.st.st_dev);
1350                         }
1351                 }
1352                 else if (delete_during && f_out != -1 && !phase && dry_run < 2
1353                     && (file->flags & FLAG_CONTENT_DIR))
1354                         delete_in_dir(fname, file, &real_sx.st.st_dev);
1355                 goto cleanup;
1356         }
1357
1358         /* If we're not preserving permissions, change the file-list's
1359          * mode based on the local permissions and some heuristics. */
1360         if (!preserve_perms) {
1361                 int exists = statret == 0 && !S_ISDIR(sx.st.st_mode);
1362                 file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms,
1363                                        exists);
1364         }
1365
1366 #ifdef SUPPORT_HARD_LINKS
1367         if (preserve_hard_links && F_HLINK_NOT_FIRST(file)
1368          && hard_link_check(file, ndx, fname, statret, &sx, itemizing, code))
1369                 goto cleanup;
1370 #endif
1371
1372         if (preserve_links && S_ISLNK(file->mode)) {
1373 #ifdef SUPPORT_LINKS
1374                 const char *sl = F_SYMLINK(file);
1375                 if (safe_symlinks && unsafe_symlink(sl, fname)) {
1376                         if (verbose) {
1377                                 if (solo_file)
1378                                         fname = f_name(file, NULL);
1379                                 rprintf(FINFO,
1380                                         "ignoring unsafe symlink %s -> \"%s\"\n",
1381                                         full_fname(fname), sl);
1382                         }
1383                         return;
1384                 }
1385                 if (statret == 0) {
1386                         char lnk[MAXPATHLEN];
1387                         int len;
1388
1389                         if (!S_ISLNK(sx.st.st_mode))
1390                                 statret = -1;
1391                         else if ((len = readlink(fname, lnk, MAXPATHLEN-1)) > 0
1392                               && strncmp(lnk, sl, len) == 0 && sl[len] == '\0') {
1393                                 /* The link is pointing to the right place. */
1394                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1395                                 if (itemizing)
1396                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1397 #ifdef SUPPORT_HARD_LINKS
1398                                 if (preserve_hard_links && F_IS_HLINKED(file))
1399                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1400 #endif
1401                                 if (remove_source_files == 1)
1402                                         goto return_with_success;
1403                                 goto cleanup;
1404                         }
1405                         /* Not the right symlink (or not a symlink), so
1406                          * delete it. */
1407                         if (delete_item(fname, sx.st.st_mode, "symlink", del_opts) != 0)
1408                                 goto cleanup;
1409                 } else if (basis_dir[0] != NULL) {
1410                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1411                                               itemizing, code);
1412                         if (j == -2) {
1413 #ifndef CAN_HARDLINK_SYMLINK
1414                                 if (link_dest) {
1415                                         /* Resort to --copy-dest behavior. */
1416                                 } else
1417 #endif
1418                                 if (!copy_dest)
1419                                         goto cleanup;
1420                                 itemizing = 0;
1421                                 code = FNONE;
1422                         } else if (j >= 0)
1423                                 statret = 1;
1424                 }
1425 #ifdef SUPPORT_HARD_LINKS
1426                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1427                         cur_flist->in_progress++;
1428                         goto cleanup;
1429                 }
1430 #endif
1431                 if (do_symlink(sl, fname) != 0) {
1432                         rsyserr(FERROR, errno, "symlink %s -> \"%s\" failed",
1433                                 full_fname(fname), sl);
1434                 } else {
1435                         set_file_attrs(fname, file, NULL, NULL, 0);
1436                         if (itemizing) {
1437                                 itemize(fname, file, ndx, statret, &sx,
1438                                         ITEM_LOCAL_CHANGE, 0, NULL);
1439                         }
1440                         if (code != FNONE && verbose)
1441                                 rprintf(code, "%s -> %s\n", fname, sl);
1442 #ifdef SUPPORT_HARD_LINKS
1443                         if (preserve_hard_links && F_IS_HLINKED(file))
1444                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1445 #endif
1446                         /* This does not check remove_source_files == 1
1447                          * because this is one of the items that the old
1448                          * --remove-sent-files option would remove. */
1449                         if (remove_source_files)
1450                                 goto return_with_success;
1451                 }
1452 #endif
1453                 goto cleanup;
1454         }
1455
1456         if ((am_root && preserve_devices && IS_DEVICE(file->mode))
1457          || (preserve_specials && IS_SPECIAL(file->mode))) {
1458                 uint32 *devp = F_RDEV_P(file);
1459                 dev_t rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
1460                 if (statret == 0) {
1461                         char *t;
1462                         if (IS_DEVICE(file->mode)) {
1463                                 if (!IS_DEVICE(sx.st.st_mode))
1464                                         statret = -1;
1465                                 t = "device file";
1466                         } else {
1467                                 if (!IS_SPECIAL(sx.st.st_mode))
1468                                         statret = -1;
1469                                 t = "special file";
1470                         }
1471                         if (statret == 0
1472                          && BITS_EQUAL(sx.st.st_mode, file->mode, _S_IFMT)
1473                          && sx.st.st_rdev == rdev) {
1474                                 /* The device or special file is identical. */
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 #ifdef SUPPORT_HARD_LINKS
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                         if (delete_item(fname, sx.st.st_mode, t, del_opts) != 0)
1487                                 goto cleanup;
1488                 } else if (basis_dir[0] != NULL) {
1489                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1490                                               itemizing, code);
1491                         if (j == -2) {
1492 #ifndef CAN_HARDLINK_SPECIAL
1493                                 if (link_dest) {
1494                                         /* Resort to --copy-dest behavior. */
1495                                 } else
1496 #endif
1497                                 if (!copy_dest)
1498                                         goto cleanup;
1499                                 itemizing = 0;
1500                                 code = FNONE;
1501                         } else if (j >= 0)
1502                                 statret = 1;
1503                 }
1504 #ifdef SUPPORT_HARD_LINKS
1505                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1506                         cur_flist->in_progress++;
1507                         goto cleanup;
1508                 }
1509 #endif
1510                 if (verbose > 2) {
1511                         rprintf(FINFO, "mknod(%s, 0%o, [%ld,%ld])\n",
1512                                 fname, (int)file->mode,
1513                                 (long)major(rdev), (long)minor(rdev));
1514                 }
1515                 if (do_mknod(fname, file->mode, rdev) < 0) {
1516                         rsyserr(FERROR, errno, "mknod %s failed",
1517                                 full_fname(fname));
1518                 } else {
1519                         set_file_attrs(fname, file, NULL, NULL, 0);
1520                         if (itemizing) {
1521                                 itemize(fname, file, ndx, statret, &sx,
1522                                         ITEM_LOCAL_CHANGE, 0, NULL);
1523                         }
1524                         if (code != FNONE && verbose)
1525                                 rprintf(code, "%s\n", fname);
1526 #ifdef SUPPORT_HARD_LINKS
1527                         if (preserve_hard_links && F_IS_HLINKED(file))
1528                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1529 #endif
1530                         if (remove_source_files == 1)
1531                                 goto return_with_success;
1532                 }
1533                 goto cleanup;
1534         }
1535
1536         if (!S_ISREG(file->mode)) {
1537                 if (solo_file)
1538                         fname = f_name(file, NULL);
1539                 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1540                 goto cleanup;
1541         }
1542
1543         if (max_size > 0 && F_LENGTH(file) > max_size) {
1544                 if (verbose > 1) {
1545                         if (solo_file)
1546                                 fname = f_name(file, NULL);
1547                         rprintf(FINFO, "%s is over max-size\n", fname);
1548                 }
1549                 goto cleanup;
1550         }
1551         if (min_size > 0 && F_LENGTH(file) < min_size) {
1552                 if (verbose > 1) {
1553                         if (solo_file)
1554                                 fname = f_name(file, NULL);
1555                         rprintf(FINFO, "%s is under min-size\n", fname);
1556                 }
1557                 goto cleanup;
1558         }
1559
1560         if (ignore_existing > 0 && statret == 0) {
1561                 if (verbose > 1)
1562                         rprintf(FINFO, "%s exists\n", fname);
1563                 goto cleanup;
1564         }
1565
1566         if (update_only > 0 && statret == 0
1567             && cmp_time(sx.st.st_mtime, file->modtime) > 0) {
1568                 if (verbose > 1)
1569                         rprintf(FINFO, "%s is newer\n", fname);
1570                 goto cleanup;
1571         }
1572
1573         fnamecmp = fname;
1574         fnamecmp_type = FNAMECMP_FNAME;
1575
1576         if (statret == 0 && !S_ISREG(sx.st.st_mode)) {
1577                 if (delete_item(fname, sx.st.st_mode, "regular file", del_opts) != 0)
1578                         goto cleanup;
1579                 statret = -1;
1580                 stat_errno = ENOENT;
1581         }
1582
1583         if (statret != 0 && basis_dir[0] != NULL) {
1584                 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &sx,
1585                                       itemizing, code);
1586                 if (j == -2) {
1587                         if (remove_source_files == 1)
1588                                 goto return_with_success;
1589                         goto cleanup;
1590                 }
1591                 if (j >= 0) {
1592                         fnamecmp = fnamecmpbuf;
1593                         fnamecmp_type = j;
1594                         statret = 0;
1595                 }
1596         }
1597
1598         real_ret = statret;
1599         real_sx = sx;
1600
1601         if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1602             && link_stat(partialptr, &partial_st, 0) == 0
1603             && S_ISREG(partial_st.st_mode)) {
1604                 if (statret != 0)
1605                         goto prepare_to_open;
1606         } else
1607                 partialptr = NULL;
1608
1609         if (statret != 0 && fuzzy_dirlist && dry_run <= 1) {
1610                 int j = find_fuzzy(file, fuzzy_dirlist);
1611                 if (j >= 0) {
1612                         fuzzy_file = fuzzy_dirlist->files[j];
1613                         f_name(fuzzy_file, fnamecmpbuf);
1614                         if (verbose > 2) {
1615                                 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1616                                         fname, fnamecmpbuf);
1617                         }
1618                         sx.st.st_size = F_LENGTH(fuzzy_file);
1619                         statret = 0;
1620                         fnamecmp = fnamecmpbuf;
1621                         fnamecmp_type = FNAMECMP_FUZZY;
1622                 }
1623         }
1624
1625         if (statret != 0) {
1626 #ifdef SUPPORT_HARD_LINKS
1627                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1628                         cur_flist->in_progress++;
1629                         goto cleanup;
1630                 }
1631 #endif
1632                 if (stat_errno == ENOENT)
1633                         goto notify_others;
1634                 rsyserr(FERROR, stat_errno, "recv_generator: failed to stat %s",
1635                         full_fname(fname));
1636                 goto cleanup;
1637         }
1638
1639         if (append_mode > 0 && sx.st.st_size >= F_LENGTH(file))
1640                 goto cleanup;
1641
1642         if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1643                 ;
1644         else if (fnamecmp_type == FNAMECMP_FUZZY)
1645                 ;
1646         else if (unchanged_file(fnamecmp, file, &sx.st)) {
1647                 if (partialptr) {
1648                         do_unlink(partialptr);
1649                         handle_partial_dir(partialptr, PDIR_DELETE);
1650                 }
1651                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1652                 if (itemizing)
1653                         itemize(fnamecmp, file, ndx, statret, &sx, 0, 0, NULL);
1654 #ifdef SUPPORT_HARD_LINKS
1655                 if (preserve_hard_links && F_IS_HLINKED(file))
1656                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1657 #endif
1658                 if (remove_source_files != 1)
1659                         goto cleanup;
1660           return_with_success:
1661                 if (!dry_run)
1662                         send_msg_int(MSG_SUCCESS, ndx);
1663                 goto cleanup;
1664         }
1665
1666   prepare_to_open:
1667         if (partialptr) {
1668                 sx.st = partial_st;
1669                 fnamecmp = partialptr;
1670                 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1671                 statret = 0;
1672         }
1673
1674         if (!do_xfers)
1675                 goto notify_others;
1676
1677         if (read_batch || whole_file) {
1678                 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1679                         if (!(backupptr = get_backup_name(fname)))
1680                                 goto cleanup;
1681                         if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
1682                                 goto pretend_missing;
1683                         if (copy_file(fname, backupptr, back_file->mode, 1) < 0) {
1684                                 unmake_file(back_file);
1685                                 back_file = NULL;
1686                                 goto cleanup;
1687                         }
1688                 }
1689                 goto notify_others;
1690         }
1691
1692         if (fuzzy_dirlist) {
1693                 int j = flist_find(fuzzy_dirlist, file);
1694                 if (j >= 0) /* don't use changing file as future fuzzy basis */
1695                         fuzzy_dirlist->files[j]->flags |= FLAG_FILE_SENT;
1696         }
1697
1698         /* open the file */
1699         if ((fd = do_open(fnamecmp, O_RDONLY, 0)) < 0) {
1700                 rsyserr(FERROR, errno, "failed to open %s, continuing",
1701                         full_fname(fnamecmp));
1702           pretend_missing:
1703                 /* pretend the file didn't exist */
1704 #ifdef SUPPORT_HARD_LINKS
1705                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1706                         cur_flist->in_progress++;
1707                         goto cleanup;
1708                 }
1709 #endif
1710                 statret = real_ret = -1;
1711                 goto notify_others;
1712         }
1713
1714         if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1715                 if (!(backupptr = get_backup_name(fname))) {
1716                         close(fd);
1717                         goto cleanup;
1718                 }
1719                 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1720                         close(fd);
1721                         goto pretend_missing;
1722                 }
1723                 if (robust_unlink(backupptr) && errno != ENOENT) {
1724                         rsyserr(FERROR, errno, "unlink %s",
1725                                 full_fname(backupptr));
1726                         unmake_file(back_file);
1727                         back_file = NULL;
1728                         close(fd);
1729                         goto cleanup;
1730                 }
1731                 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0
1732                  && (errno != ENOENT || make_bak_dir(backupptr) < 0
1733                   || (f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0)) {
1734                         rsyserr(FERROR, errno, "open %s",
1735                                 full_fname(backupptr));
1736                         unmake_file(back_file);
1737                         back_file = NULL;
1738                         close(fd);
1739                         goto cleanup;
1740                 }
1741                 fnamecmp_type = FNAMECMP_BACKUP;
1742         }
1743
1744         if (verbose > 3) {
1745                 rprintf(FINFO, "gen mapped %s of size %.0f\n",
1746                         fnamecmp, (double)sx.st.st_size);
1747         }
1748
1749         if (verbose > 2)
1750                 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1751
1752   notify_others:
1753         if (remove_source_files && !delay_updates && !phase)
1754                 increment_active_files(ndx, itemizing, code);
1755         if (inc_recurse && !dry_run)
1756                 cur_flist->in_progress++;
1757 #ifdef SUPPORT_HARD_LINKS
1758         if (preserve_hard_links && F_IS_HLINKED(file))
1759                 file->flags |= FLAG_FILE_SENT;
1760 #endif
1761         write_ndx(f_out, ndx);
1762         if (itemizing) {
1763                 int iflags = ITEM_TRANSFER;
1764                 if (always_checksum > 0)
1765                         iflags |= ITEM_REPORT_CHECKSUM;
1766                 if (fnamecmp_type != FNAMECMP_FNAME)
1767                         iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1768                 if (fnamecmp_type == FNAMECMP_FUZZY)
1769                         iflags |= ITEM_XNAME_FOLLOWS;
1770                 itemize(fnamecmp, file, -1, real_ret, &real_sx, iflags, fnamecmp_type,
1771                         fuzzy_file ? fuzzy_file->basename : NULL);
1772 #ifdef SUPPORT_ACLS
1773                 if (preserve_acls)
1774                         free_acl(&real_sx);
1775 #endif
1776 #ifdef SUPPORT_XATTRS
1777                 if (preserve_xattrs)
1778                         free_xattr(&real_sx);
1779 #endif
1780         }
1781
1782         if (!do_xfers) {
1783 #ifdef SUPPORT_HARD_LINKS
1784                 if (preserve_hard_links && F_IS_HLINKED(file))
1785                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1786 #endif
1787                 goto cleanup;
1788         }
1789         if (read_batch)
1790                 goto cleanup;
1791
1792         if (statret != 0 || whole_file)
1793                 write_sum_head(f_out, NULL);
1794         else {
1795                 generate_and_send_sums(fd, sx.st.st_size, f_out, f_copy);
1796                 close(fd);
1797         }
1798
1799   cleanup:
1800         if (back_file) {
1801                 if (f_copy >= 0)
1802                         close(f_copy);
1803                 set_file_attrs(backupptr, back_file, NULL, NULL, 0);
1804                 if (verbose > 1) {
1805                         rprintf(FINFO, "backed up %s to %s\n",
1806                                 fname, backupptr);
1807                 }
1808                 unmake_file(back_file);
1809         }
1810
1811 #ifdef SUPPORT_ACLS
1812         if (preserve_acls)
1813                 free_acl(&sx);
1814 #endif
1815 #ifdef SUPPORT_XATTRS
1816         if (preserve_xattrs)
1817                 free_xattr(&sx);
1818 #endif
1819         return;
1820 }
1821
1822 static void touch_up_dirs(struct file_list *flist, int ndx)
1823 {
1824         static int counter = 0;
1825         struct file_struct *file;
1826         char *fname;
1827         int i, start, end;
1828
1829         if (ndx < 0) {
1830                 start = 0;
1831                 end = flist->used - 1;
1832         } else
1833                 start = end = ndx;
1834
1835         /* Fix any directory permissions that were modified during the
1836          * transfer and/or re-set any tweaked modified-time values. */
1837         for (i = start; i <= end; i++, counter++) {
1838                 file = flist->files[i];
1839                 if (!S_ISDIR(file->mode)
1840                  || (!implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1841                         continue;
1842                 if (verbose > 3) {
1843                         fname = f_name(file, NULL);
1844                         rprintf(FINFO, "touch_up_dirs: %s (%d)\n",
1845                                 NS(fname), i);
1846                 }
1847                 if (!F_IS_ACTIVE(file) || file->flags & FLAG_MISSING_DIR
1848                  || (!need_retouch_dir_times && file->mode & S_IWUSR))
1849                         continue;
1850                 fname = f_name(file, NULL);
1851                 if (!(file->mode & S_IWUSR))
1852                         do_chmod(fname, file->mode);
1853                 if (need_retouch_dir_times)
1854                         set_modtime(fname, file->modtime, file->mode);
1855                 if (allowed_lull && !(counter % lull_mod))
1856                         maybe_send_keepalive();
1857                 else if (!(counter & 0xFF))
1858                         maybe_flush_socket(0);
1859         }
1860 }
1861
1862 void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
1863 {
1864         struct file_struct *file;
1865         struct file_list *flist;
1866         char fbuf[MAXPATHLEN];
1867         int ndx;
1868
1869 #ifdef SUPPORT_HARD_LINKS
1870         while (preserve_hard_links && (ndx = get_hlink_num()) != -1) {
1871                 flist = flist_for_ndx(ndx);
1872                 assert(flist != NULL);
1873                 file = flist->files[ndx - flist->ndx_start];
1874                 assert(file->flags & FLAG_HLINKED);
1875                 finish_hard_link(file, f_name(file, fbuf), ndx, NULL, itemizing, code, -1);
1876         }
1877 #endif
1878
1879         while (check_redo && (ndx = get_redo_num()) != -1) {
1880                 csum_length = SUM_LENGTH;
1881                 max_size = -max_size;
1882                 min_size = -min_size;
1883                 ignore_existing = -ignore_existing;
1884                 ignore_non_existing = -ignore_non_existing;
1885                 update_only = -update_only;
1886                 always_checksum = -always_checksum;
1887                 size_only = -size_only;
1888                 append_mode = -append_mode;
1889                 make_backups = -make_backups; /* avoid dup backup w/inplace */
1890                 ignore_times++;
1891
1892                 flist = cur_flist;
1893                 cur_flist = flist_for_ndx(ndx);
1894
1895                 file = cur_flist->files[ndx - cur_flist->ndx_start];
1896                 if (solo_file)
1897                         strlcpy(fbuf, solo_file, sizeof fbuf);
1898                 else
1899                         f_name(file, fbuf);
1900                 recv_generator(fbuf, file, ndx, itemizing, code, sock_f_out);
1901                 cur_flist->to_redo--;
1902
1903                 cur_flist = flist;
1904
1905                 csum_length = SHORT_SUM_LENGTH;
1906                 max_size = -max_size;
1907                 min_size = -min_size;
1908                 ignore_existing = -ignore_existing;
1909                 ignore_non_existing = -ignore_non_existing;
1910                 update_only = -update_only;
1911                 always_checksum = -always_checksum;
1912                 size_only = -size_only;
1913                 append_mode = -append_mode;
1914                 make_backups = -make_backups;
1915                 ignore_times--;
1916         }
1917
1918         while (cur_flist != first_flist) { /* only possible with inc_recurse */
1919                 if (first_flist->in_progress || first_flist->to_redo)
1920                         break;
1921
1922                 if (!read_batch) {
1923                         write_ndx(sock_f_out, NDX_DONE);
1924                         maybe_flush_socket(1);
1925                 }
1926
1927                 if (delete_during == 2 || !dir_tweaking) {
1928                         /* Skip directory touch-up. */
1929                 } else if (first_flist->ndx_start != 0)
1930                         touch_up_dirs(dir_flist, first_flist->parent_ndx);
1931
1932                 flist_free(first_flist); /* updates first_flist */
1933         }
1934 }
1935
1936 void generate_files(int f_out, const char *local_name)
1937 {
1938         int i, ndx;
1939         char fbuf[MAXPATHLEN];
1940         int itemizing;
1941         enum logcode code;
1942         int save_do_progress = do_progress;
1943
1944         if (protocol_version >= 29) {
1945                 itemizing = 1;
1946                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
1947                 code = logfile_format_has_i ? FNONE : FLOG;
1948         } else if (am_daemon) {
1949                 itemizing = logfile_format_has_i && do_xfers;
1950                 maybe_ATTRS_REPORT = ATTRS_REPORT;
1951                 code = itemizing || !do_xfers ? FCLIENT : FINFO;
1952         } else if (!am_server) {
1953                 itemizing = stdout_format_has_i;
1954                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
1955                 code = itemizing ? FNONE : FINFO;
1956         } else {
1957                 itemizing = 0;
1958                 maybe_ATTRS_REPORT = ATTRS_REPORT;
1959                 code = FINFO;
1960         }
1961         solo_file = local_name;
1962         dir_tweaking = !(list_only || solo_file || dry_run);
1963         need_retouch_dir_times = preserve_times > 1;
1964         lull_mod = allowed_lull * 5;
1965
1966         if (verbose > 2)
1967                 rprintf(FINFO, "generator starting pid=%ld\n", (long)getpid());
1968
1969         if (delete_before && !solo_file && cur_flist->used > 0)
1970                 do_delete_pass();
1971         if (delete_during == 2) {
1972                 deldelay_size = BIGPATHBUFLEN * 4;
1973                 deldelay_buf = new_array(char, deldelay_size);
1974                 if (!deldelay_buf)
1975                         out_of_memory("delete-delay");
1976         }
1977         do_progress = 0;
1978
1979         if (append_mode > 0 || whole_file < 0)
1980                 whole_file = 0;
1981         if (verbose >= 2) {
1982                 rprintf(FINFO, "delta-transmission %s\n",
1983                         whole_file
1984                         ? "disabled for local transfer or --whole-file"
1985                         : "enabled");
1986         }
1987
1988         /* Since we often fill up the outgoing socket and then just sit around
1989          * waiting for the other 2 processes to do their thing, we don't want
1990          * to exit on a timeout.  If the data stops flowing, the receiver will
1991          * notice that and let us know via the redo pipe (or its closing). */
1992         ignore_timeout = 1;
1993
1994         dflt_perms = (ACCESSPERMS & ~orig_umask);
1995
1996         do {
1997 #ifdef SUPPORT_HARD_LINKS
1998                 if (preserve_hard_links && inc_recurse) {
1999                         while (!flist_eof && file_total < FILECNT_LOOKAHEAD/2)
2000                                 wait_for_receiver();
2001                 }
2002 #endif
2003
2004                 if (inc_recurse && cur_flist->ndx_start) {
2005                         struct file_struct *fp = dir_flist->files[cur_flist->parent_ndx];
2006                         f_name(fp, fbuf);
2007                         ndx = cur_flist->ndx_start - 1;
2008                         recv_generator(fbuf, fp, ndx, itemizing, code, f_out);
2009                         if (delete_during && dry_run < 2) {
2010                                 if (BITS_SETnUNSET(fp->flags, FLAG_CONTENT_DIR, FLAG_MISSING_DIR)) {
2011                                         dev_t dirdev;
2012                                         if (one_file_system) {
2013                                                 uint32 *devp = F_DIR_DEV_P(fp);
2014                                                 dirdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
2015                                         } else
2016                                                 dirdev = MAKEDEV(0, 0);
2017                                         delete_in_dir(f_name(fp, fbuf), fp, &dirdev);
2018                                 }
2019                         }
2020                 }
2021                 for (i = cur_flist->low; i <= cur_flist->high; i++) {
2022                         struct file_struct *file = cur_flist->sorted[i];
2023
2024                         if (!F_IS_ACTIVE(file))
2025                                 continue;
2026
2027 #ifdef ICONV_OPTION
2028                         if (ic_ndx)
2029                                 ndx = F_NDX(file);
2030                         else
2031 #endif
2032                                 ndx = i + cur_flist->ndx_start;
2033
2034                         if (solo_file)
2035                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2036                         else
2037                                 f_name(file, fbuf);
2038                         recv_generator(fbuf, file, ndx, itemizing, code, f_out);
2039
2040                         check_for_finished_files(itemizing, code, 0);
2041
2042                         if (allowed_lull && !(i % lull_mod))
2043                                 maybe_send_keepalive();
2044                         else if (!(i & 0xFF))
2045                                 maybe_flush_socket(0);
2046                 }
2047
2048                 if (!inc_recurse) {
2049                         write_ndx(f_out, NDX_DONE);
2050                         break;
2051                 }
2052
2053                 while (1) {
2054                         check_for_finished_files(itemizing, code, 1);
2055                         if (cur_flist->next || flist_eof)
2056                                 break;
2057                         wait_for_receiver();
2058                 }
2059         } while ((cur_flist = cur_flist->next) != NULL);
2060
2061         if (delete_during)
2062                 delete_in_dir(NULL, NULL, &dev_zero);
2063         phase++;
2064         if (verbose > 2)
2065                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2066
2067         while (1) {
2068                 check_for_finished_files(itemizing, code, 1);
2069                 if (msgdone_cnt)
2070                         break;
2071                 wait_for_receiver();
2072         }
2073
2074         phase++;
2075         if (verbose > 2)
2076                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2077
2078         write_ndx(f_out, NDX_DONE);
2079         /* Reduce round-trip lag-time for a useless delay-updates phase. */
2080         if (protocol_version >= 29 && !delay_updates)
2081                 write_ndx(f_out, NDX_DONE);
2082
2083         /* Read MSG_DONE for the redo phase (and any prior messages). */
2084         while (1) {
2085                 check_for_finished_files(itemizing, code, 0);
2086                 if (msgdone_cnt > 1)
2087                         break;
2088                 wait_for_receiver();
2089         }
2090
2091         if (protocol_version >= 29) {
2092                 phase++;
2093                 if (verbose > 2)
2094                         rprintf(FINFO, "generate_files phase=%d\n", phase);
2095                 if (delay_updates)
2096                         write_ndx(f_out, NDX_DONE);
2097                 /* Read MSG_DONE for delay-updates phase & prior messages. */
2098                 while (msgdone_cnt == 2)
2099                         wait_for_receiver();
2100         }
2101
2102         do_progress = save_do_progress;
2103         if (delete_during == 2)
2104                 do_delayed_deletions(fbuf);
2105         if (delete_after && !solo_file && file_total > 0)
2106                 do_delete_pass();
2107
2108         if ((need_retouch_dir_perms || need_retouch_dir_times)
2109          && dir_tweaking && (!inc_recurse || delete_during == 2))
2110                 touch_up_dirs(dir_flist, -1);
2111
2112         if (max_delete >= 0 && deletion_count > max_delete) {
2113                 rprintf(FINFO,
2114                         "Deletions stopped due to --max-delete limit (%d skipped)\n",
2115                         deletion_count - max_delete);
2116                 io_error |= IOERR_DEL_LIMIT;
2117         }
2118
2119         if (verbose > 2)
2120                 rprintf(FINFO, "generate_files finished\n");
2121 }