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 receiver_symlink_times;
  31 extern int am_root;
  32 extern int am_server;
  33 extern int am_daemon;
  34 extern int inc_recurse;
  35 extern int do_progress;
  36 extern int relative_paths;
  37 extern int implied_dirs;
  38 extern int keep_dirlinks;
  39 extern int preserve_acls;
  40 extern int preserve_xattrs;
  41 extern int preserve_links;
  42 extern int preserve_devices;
  43 extern int preserve_specials;
  44 extern int preserve_hard_links;
  45 extern int preserve_executability;
  46 extern int preserve_perms;
  47 extern int preserve_times;
  48 extern int uid_ndx;
  49 extern int gid_ndx;
  50 extern int delete_mode;
  51 extern int delete_before;
  52 extern int delete_during;
  53 extern int delete_after;
  54 extern int msgdone_cnt;
  55 extern int ignore_errors;
  56 extern int remove_source_files;
  57 extern int delay_updates;
  58 extern int update_only;
  59 extern int ignore_existing;
  60 extern int ignore_non_existing;
  61 extern int inplace;
  62 extern int append_mode;
  63 extern int make_backups;
  64 extern int csum_length;
  65 extern int ignore_times;
  66 extern int size_only;
  67 extern OFF_T max_size;
  68 extern OFF_T min_size;
  69 extern int io_error;
  70 extern int flist_eof;
  71 extern int allowed_lull;
  72 extern int sock_f_out;
  73 extern int ignore_timeout;
  74 extern int protocol_version;
  75 extern int file_total;
  76 extern int fuzzy_basis;
  77 extern int always_checksum;
  78 extern int checksum_len;
  79 extern char *partial_dir;
  80 extern char *basis_dir[];
  81 extern int compare_dest;
  82 extern int copy_dest;
  83 extern int link_dest;
  84 extern int whole_file;
  85 extern int list_only;
  86 extern int read_batch;
  87 extern int safe_symlinks;
  88 extern long block_size; /* "long" because popt can't set an int32. */
  89 extern int unsort_ndx;
  90 extern int max_delete;
  91 extern int force_delete;
  92 extern int one_file_system;
  93 extern struct stats stats;
  94 extern dev_t filesystem_dev;
  95 extern mode_t orig_umask;
  96 extern uid_t our_uid;
  97 extern char *backup_dir;
  98 extern char *backup_suffix;
  99 extern int backup_suffix_len;
 100 extern struct file_list *cur_flist, *first_flist, *dir_flist;
 101 extern struct filter_list_struct server_filter_list;
 102
 103 int ignore_perishable = 0;
 104 int non_perishable_cnt = 0;
 105 int maybe_ATTRS_REPORT = 0;
 106
 107 static dev_t dev_zero;
 108 static int deletion_count = 0; /* used to implement --max-delete */
 109 static int deldelay_size = 0, deldelay_cnt = 0;
 110 static char *deldelay_buf = NULL;
 111 static int deldelay_fd = -1;
 112 static int lull_mod;
 113 static int dir_tweaking;
 114 static int need_retouch_dir_times;
 115 static int need_retouch_dir_perms;
 116 static const char *solo_file = NULL;
 117
 118 /* For calling delete_item() and delete_dir_contents(). */
 119 #define DEL_NO_UID_WRITE        (1<<0) /* file/dir has our uid w/o write perm */
 120 #define DEL_RECURSE             (1<<1) /* if dir, delete all contents */
 121 #define DEL_DIR_IS_EMPTY        (1<<2) /* internal delete_FUNCTIONS use only */
 122 #define DEL_FOR_FILE            (1<<3) /* making room for a replacement file */
 123 #define DEL_FOR_DIR             (1<<4) /* making room for a replacement dir */
 124 #define DEL_FOR_SYMLINK         (1<<5) /* making room for a replacement symlink */
 125 #define DEL_FOR_DEVICE          (1<<6) /* making room for a replacement device */
 126 #define DEL_FOR_SPECIAL         (1<<7) /* making room for a replacement special */
 127
 128 #define DEL_MAKE_ROOM (DEL_FOR_FILE|DEL_FOR_DIR|DEL_FOR_SYMLINK|DEL_FOR_DEVICE|DEL_FOR_SPECIAL)
 129
 130 enum nonregtype {
 131     TYPE_DIR, TYPE_SPECIAL, TYPE_DEVICE, TYPE_SYMLINK
 132 };
 133
 134 enum delret {
 135     DR_SUCCESS = 0, DR_FAILURE, DR_AT_LIMIT, DR_NOT_EMPTY
 136 };
 137
 138 /* Forward declaration for delete_item(). */
 139 static enum delret delete_dir_contents(char *fname, uint16 flags);
 140
 141 static int is_backup_file(char *fn)
 142 {
 143         int k = strlen(fn) - backup_suffix_len;
 144         return k > 0 && strcmp(fn+k, backup_suffix) == 0;
 145 }
 146
 147 /* Delete a file or directory.  If DEL_RECURSE is set in the flags, this will
 148  * delete recursively.
 149  *
 150  * Note that fbuf must point to a MAXPATHLEN buffer if the mode indicates it's
 151  * a directory! (The buffer is used for recursion, but returned unchanged.)
 152  */
 153 static enum delret delete_item(char *fbuf, uint16 mode, uint16 flags)
 154 {
 155         enum delret ret;
 156         char *what;
 157         int ok;
 158
 159         if (verbose > 2) {
 160                 rprintf(FINFO, "delete_item(%s) mode=%o flags=%d\n",
 161                         fbuf, (int)mode, (int)flags);
 162         }
 163
 164         if (flags & DEL_NO_UID_WRITE)
 165                 do_chmod(fbuf, mode | S_IWUSR);
 166
 167         if (S_ISDIR(mode) && !(flags & DEL_DIR_IS_EMPTY)) {
 168                 int save_uid_ndx = uid_ndx;
 169                 /* This only happens on the first call to delete_item() since
 170                  * delete_dir_contents() always calls us w/DEL_DIR_IS_EMPTY. */
 171                 if (!uid_ndx)
 172                         uid_ndx = ++file_extra_cnt;
 173                 ignore_perishable = 1;
 174                 /* If DEL_RECURSE is not set, this just reports emptiness. */
 175                 ret = delete_dir_contents(fbuf, flags);
 176                 ignore_perishable = 0;
 177                 if (!save_uid_ndx) {
 178                         --file_extra_cnt;
 179                         uid_ndx = 0;
 180                 }
 181                 if (ret == DR_NOT_EMPTY || ret == DR_AT_LIMIT)
 182                         goto check_ret;
 183                 /* OK: try to delete the directory. */
 184         }
 185
 186         if (!(flags & DEL_MAKE_ROOM) && max_delete >= 0 && ++deletion_count > max_delete)
 187                 return DR_AT_LIMIT;
 188
 189         if (S_ISDIR(mode)) {
 190                 what = "rmdir";
 191                 ok = do_rmdir(fbuf) == 0;
 192         } else if (make_backups > 0 && (backup_dir || !is_backup_file(fbuf))) {
 193                 what = "make_backup";
 194                 ok = make_backup(fbuf);
 195         } else {
 196                 what = "unlink";
 197                 ok = robust_unlink(fbuf) == 0;
 198         }
 199
 200         if (ok) {
 201                 if (!(flags & DEL_MAKE_ROOM))
 202                         log_delete(fbuf, mode);
 203                 ret = DR_SUCCESS;
 204         } else {
 205                 if (S_ISDIR(mode) && errno == ENOTEMPTY) {
 206                         rprintf(FINFO, "cannot delete non-empty directory: %s\n",
 207                                 fbuf);
 208                         ret = DR_NOT_EMPTY;
 209                 } else if (errno != ENOENT) {
 210                         rsyserr(FERROR, errno, "delete_file: %s(%s) failed",
 211                                 what, fbuf);
 212                         ret = DR_FAILURE;
 213                 } else {
 214                         deletion_count--;
 215                         ret = DR_SUCCESS;
 216                 }
 217         }
 218
 219   check_ret:
 220         if (ret != DR_SUCCESS && flags & DEL_MAKE_ROOM) {
 221                 const char *desc;
 222                 switch (flags & DEL_MAKE_ROOM) {
 223                 case DEL_FOR_FILE: desc = "regular file"; break;
 224                 case DEL_FOR_DIR: desc = "directory"; break;
 225                 case DEL_FOR_SYMLINK: desc = "symlink"; break;
 226                 case DEL_FOR_DEVICE: desc = "device file"; break;
 227                 case DEL_FOR_SPECIAL: desc = "special file"; break;
 228                 default: exit_cleanup(RERR_UNSUPPORTED); /* IMPOSSIBLE */
 229                 }
 230                 rprintf(FERROR_XFER, "could not make way for new %s: %s\n",
 231                         desc, fbuf);
 232         }
 233         return ret;
 234 }
 235
 236 /* The directory is about to be deleted: if DEL_RECURSE is given, delete all
 237  * its contents, otherwise just checks for content.  Returns DR_SUCCESS or
 238  * DR_NOT_EMPTY.  Note that fname must point to a MAXPATHLEN buffer!  (The
 239  * buffer is used for recursion, but returned unchanged.)
 240  */
 241 static enum delret delete_dir_contents(char *fname, uint16 flags)
 242 {
 243         struct file_list *dirlist;
 244         enum delret ret;
 245         unsigned remainder;
 246         void *save_filters;
 247         int j, dlen;
 248         char *p;
 249
 250         if (verbose > 3) {
 251                 rprintf(FINFO, "delete_dir_contents(%s) flags=%d\n",
 252                         fname, flags);
 253         }
 254
 255         dlen = strlen(fname);
 256         save_filters = push_local_filters(fname, dlen);
 257
 258         non_perishable_cnt = 0;
 259         dirlist = get_dirlist(fname, dlen, 0);
 260         ret = non_perishable_cnt ? DR_NOT_EMPTY : DR_SUCCESS;
 261
 262         if (!dirlist->used)
 263                 goto done;
 264
 265         if (!(flags & DEL_RECURSE)) {
 266                 ret = DR_NOT_EMPTY;
 267                 goto done;
 268         }
 269
 270         p = fname + dlen;
 271         if (dlen != 1 || *fname != '/')
 272                 *p++ = '/';
 273         remainder = MAXPATHLEN - (p - fname);
 274
 275         /* We do our own recursion, so make delete_item() non-recursive. */
 276         flags = (flags & ~(DEL_RECURSE|DEL_MAKE_ROOM|DEL_NO_UID_WRITE))
 277               | DEL_DIR_IS_EMPTY;
 278
 279         for (j = dirlist->used; j--; ) {
 280                 struct file_struct *fp = dirlist->files[j];
 281
 282                 if (fp->flags & FLAG_MOUNT_DIR) {
 283                         if (verbose > 1) {
 284                                 rprintf(FINFO,
 285                                     "mount point, %s, pins parent directory\n",
 286                                     f_name(fp, NULL));
 287                         }
 288                         ret = DR_NOT_EMPTY;
 289                         continue;
 290                 }
 291
 292                 strlcpy(p, fp->basename, remainder);
 293                 if (!(fp->mode & S_IWUSR) && !am_root && (uid_t)F_OWNER(fp) == our_uid)
 294                         do_chmod(fname, fp->mode | S_IWUSR);
 295                 /* Save stack by recursing to ourself directly. */
 296                 if (S_ISDIR(fp->mode)) {
 297                         if (delete_dir_contents(fname, flags | DEL_RECURSE) != DR_SUCCESS)
 298                                 ret = DR_NOT_EMPTY;
 299                 }
 300                 if (delete_item(fname, fp->mode, flags) != DR_SUCCESS)
 301                         ret = DR_NOT_EMPTY;
 302         }
 303
 304         fname[dlen] = '\0';
 305
 306   done:
 307         flist_free(dirlist);
 308         pop_local_filters(save_filters);
 309
 310         if (ret == DR_NOT_EMPTY) {
 311                 rprintf(FINFO, "cannot delete non-empty directory: %s\n",
 312                         fname);
 313         }
 314         return ret;
 315 }
 316
 317 static int start_delete_delay_temp(void)
 318 {
 319         char fnametmp[MAXPATHLEN];
 320         int save_dry_run = dry_run;
 321
 322         dry_run = 0;
 323         if (!get_tmpname(fnametmp, "deldelay")
 324          || (deldelay_fd = do_mkstemp(fnametmp, 0600)) < 0) {
 325                 rprintf(FINFO, "NOTE: Unable to create delete-delay temp file%s.\n",
 326                         inc_recurse ? "" : " -- switching to --delete-after");
 327                 delete_during = 0;
 328                 delete_after = !inc_recurse;
 329                 dry_run = save_dry_run;
 330                 return 0;
 331         }
 332         unlink(fnametmp);
 333         dry_run = save_dry_run;
 334         return 1;
 335 }
 336
 337 static int flush_delete_delay(void)
 338 {
 339         if (deldelay_fd < 0 && !start_delete_delay_temp())
 340                 return 0;
 341         if (write(deldelay_fd, deldelay_buf, deldelay_cnt) != deldelay_cnt) {
 342                 rsyserr(FERROR, errno, "flush of delete-delay buffer");
 343                 delete_during = 0;
 344                 delete_after = !inc_recurse;
 345                 close(deldelay_fd);
 346                 return 0;
 347         }
 348         deldelay_cnt = 0;
 349         return 1;
 350 }
 351
 352 static int remember_delete(struct file_struct *file, const char *fname, int flags)
 353 {
 354         int len;
 355
 356         if (deldelay_cnt == deldelay_size && !flush_delete_delay())
 357                 return 0;
 358
 359         if (flags & DEL_NO_UID_WRITE)
 360                 deldelay_buf[deldelay_cnt++] = '!';
 361
 362         while (1) {
 363                 len = snprintf(deldelay_buf + deldelay_cnt,
 364                                deldelay_size - deldelay_cnt,
 365                                "%x %s%c",
 366                                (int)file->mode, fname, '\0');
 367                 if ((deldelay_cnt += len) <= deldelay_size)
 368                         break;
 369                 deldelay_cnt -= len;
 370                 if (!flush_delete_delay())
 371                         return 0;
 372         }
 373
 374         return 1;
 375 }
 376
 377 static int read_delay_line(char *buf, int *flags_p)
 378 {
 379         static int read_pos = 0;
 380         int j, len, mode;
 381         char *bp, *past_space;
 382
 383         while (1) {
 384                 for (j = read_pos; j < deldelay_cnt && deldelay_buf[j]; j++) {}
 385                 if (j < deldelay_cnt)
 386                         break;
 387                 if (deldelay_fd < 0) {
 388                         if (j > read_pos)
 389                                 goto invalid_data;
 390                         return -1;
 391                 }
 392                 deldelay_cnt -= read_pos;
 393                 if (deldelay_cnt == deldelay_size)
 394                         goto invalid_data;
 395                 if (deldelay_cnt && read_pos) {
 396                         memmove(deldelay_buf, deldelay_buf + read_pos,
 397                                 deldelay_cnt);
 398                 }
 399                 len = read(deldelay_fd, deldelay_buf + deldelay_cnt,
 400                            deldelay_size - deldelay_cnt);
 401                 if (len == 0) {
 402                         if (deldelay_cnt) {
 403                                 rprintf(FERROR,
 404                                     "ERROR: unexpected EOF in delete-delay file.\n");
 405                         }
 406                         return -1;
 407                 }
 408                 if (len < 0) {
 409                         rsyserr(FERROR, errno,
 410                                 "reading delete-delay file");
 411                         return -1;
 412                 }
 413                 deldelay_cnt += len;
 414                 read_pos = 0;
 415         }
 416
 417         bp = deldelay_buf + read_pos;
 418         if (*bp == '!') {
 419                 bp++;
 420                 *flags_p = DEL_NO_UID_WRITE;
 421         } else
 422                 *flags_p = 0;
 423
 424         if (sscanf(bp, "%x ", &mode) != 1) {
 425           invalid_data:
 426                 rprintf(FERROR, "ERROR: invalid data in delete-delay file.\n");
 427                 return -1;
 428         }
 429         past_space = strchr(bp, ' ') + 1;
 430         len = j - read_pos - (past_space - bp) + 1; /* count the '\0' */
 431         read_pos = j + 1;
 432
 433         if (len > MAXPATHLEN) {
 434                 rprintf(FERROR, "ERROR: filename too long in delete-delay file.\n");
 435                 return -1;
 436         }
 437
 438         /* The caller needs the name in a MAXPATHLEN buffer, so we copy it
 439          * instead of returning a pointer to our buffer. */
 440         memcpy(buf, past_space, len);
 441
 442         return mode;
 443 }
 444
 445 static void do_delayed_deletions(char *delbuf)
 446 {
 447         int mode, flags;
 448
 449         if (deldelay_fd >= 0) {
 450                 if (deldelay_cnt && !flush_delete_delay())
 451                         return;
 452                 lseek(deldelay_fd, 0, 0);
 453         }
 454         while ((mode = read_delay_line(delbuf, &flags)) >= 0)
 455                 delete_item(delbuf, mode, flags | DEL_RECURSE);
 456         if (deldelay_fd >= 0)
 457                 close(deldelay_fd);
 458 }
 459
 460 /* This function is used to implement per-directory deletion, and is used by
 461  * all the --delete-WHEN options.  Note that the fbuf pointer must point to a
 462  * MAXPATHLEN buffer with the name of the directory in it (the functions we
 463  * call will append names onto the end, but the old dir value will be restored
 464  * on exit). */
 465 static void delete_in_dir(char *fbuf, struct file_struct *file, dev_t *fs_dev)
 466 {
 467         static int already_warned = 0;
 468         struct file_list *dirlist;
 469         char delbuf[MAXPATHLEN];
 470         int dlen, i;
 471         int save_uid_ndx = uid_ndx;
 472
 473         if (!fbuf) {
 474                 change_local_filter_dir(NULL, 0, 0);
 475                 return;
 476         }
 477
 478         if (verbose > 2)
 479                 rprintf(FINFO, "delete_in_dir(%s)\n", fbuf);
 480
 481         if (allowed_lull)
 482                 maybe_send_keepalive();
 483
 484         if (io_error && !ignore_errors) {
 485                 if (already_warned)
 486                         return;
 487                 rprintf(FINFO,
 488                         "IO error encountered -- skipping file deletion\n");
 489                 already_warned = 1;
 490                 return;
 491         }
 492
 493         dlen = strlen(fbuf);
 494         change_local_filter_dir(fbuf, dlen, F_DEPTH(file));
 495
 496         if (one_file_system) {
 497                 if (file->flags & FLAG_TOP_DIR)
 498                         filesystem_dev = *fs_dev;
 499                 else if (filesystem_dev != *fs_dev)
 500                         return;
 501         }
 502
 503         if (!uid_ndx)
 504                 uid_ndx = ++file_extra_cnt;
 505
 506         dirlist = get_dirlist(fbuf, dlen, 0);
 507
 508         /* If an item in dirlist is not found in flist, delete it
 509          * from the filesystem. */
 510         for (i = dirlist->used; i--; ) {
 511                 struct file_struct *fp = dirlist->files[i];
 512                 if (!F_IS_ACTIVE(fp))
 513                         continue;
 514                 if (fp->flags & FLAG_MOUNT_DIR) {
 515                         if (verbose > 1)
 516                                 rprintf(FINFO, "cannot delete mount point: %s\n",
 517                                         f_name(fp, NULL));
 518                         continue;
 519                 }
 520                 if (flist_find(cur_flist, fp) < 0) {
 521                         int flags = DEL_RECURSE;
 522                         if (!(fp->mode & S_IWUSR) && !am_root && (uid_t)F_OWNER(fp) == our_uid)
 523                                 flags |= DEL_NO_UID_WRITE;
 524                         f_name(fp, delbuf);
 525                         if (delete_during == 2) {
 526                                 if (!remember_delete(fp, delbuf, flags))
 527                                         break;
 528                         } else
 529                                 delete_item(delbuf, fp->mode, flags);
 530                 }
 531         }
 532
 533         flist_free(dirlist);
 534
 535         if (!save_uid_ndx) {
 536                 --file_extra_cnt;
 537                 uid_ndx = 0;
 538         }
 539 }
 540
 541 /* This deletes any files on the receiving side that are not present on the
 542  * sending side.  This is used by --delete-before and --delete-after. */
 543 static void do_delete_pass(void)
 544 {
 545         char fbuf[MAXPATHLEN];
 546         STRUCT_STAT st;
 547         int j;
 548
 549         /* dry_run is incremented when the destination doesn't exist yet. */
 550         if (dry_run > 1 || list_only)
 551                 return;
 552
 553         for (j = 0; j < cur_flist->used; j++) {
 554                 struct file_struct *file = cur_flist->sorted[j];
 555
 556                 if (!(file->flags & FLAG_CONTENT_DIR))
 557                         continue;
 558
 559                 f_name(file, fbuf);
 560                 if (verbose > 1 && file->flags & FLAG_TOP_DIR)
 561                         rprintf(FINFO, "deleting in %s\n", fbuf);
 562
 563                 if (link_stat(fbuf, &st, keep_dirlinks) < 0
 564                  || !S_ISDIR(st.st_mode))
 565                         continue;
 566
 567                 delete_in_dir(fbuf, file, &st.st_dev);
 568         }
 569         delete_in_dir(NULL, NULL, &dev_zero);
 570
 571         if (do_progress && !am_server)
 572                 rprintf(FINFO, "                    \r");
 573 }
 574
 575 int unchanged_attrs(const char *fname, struct file_struct *file, stat_x *sxp)
 576 {
 577 #if !defined HAVE_LUTIMES || !defined HAVE_UTIMES
 578         if (S_ISLNK(file->mode)) {
 579                 ;
 580         } else
 581 #endif
 582         if (preserve_times && cmp_time(sxp->st.st_mtime, file->modtime) != 0)
 583                 return 0;
 584
 585         if (preserve_perms && !BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
 586                 return 0;
 587
 588         if (preserve_executability && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
 589                 return 0;
 590
 591         if (am_root && uid_ndx && sxp->st.st_uid != (uid_t)F_OWNER(file))
 592                 return 0;
 593
 594         if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP) && sxp->st.st_gid != (gid_t)F_GROUP(file))
 595                 return 0;
 596
 597 #ifdef SUPPORT_ACLS
 598         if (preserve_acls && !S_ISLNK(file->mode)) {
 599                 if (!ACL_READY(*sxp))
 600                         get_acl(fname, sxp);
 601                 if (set_acl(NULL, file, sxp) == 0)
 602                         return 0;
 603         }
 604 #endif
 605 #ifdef SUPPORT_XATTRS
 606         if (preserve_xattrs) {
 607                 if (!XATTR_READY(*sxp))
 608                         get_xattr(fname, sxp);
 609                 if (xattr_diff(file, sxp, 0))
 610                         return 0;
 611         }
 612 #endif
 613
 614         return 1;
 615 }
 616
 617 void itemize(const char *fnamecmp, struct file_struct *file, int ndx, int statret,
 618              stat_x *sxp, int32 iflags, uchar fnamecmp_type,
 619              const char *xname)
 620 {
 621         if (statret >= 0) { /* A from-dest-dir statret can == 1! */
 622                 int keep_time = !preserve_times ? 0
 623                     : S_ISDIR(file->mode) ? preserve_times > 1 :
 624 #if defined HAVE_LUTIMES && defined HAVE_UTIMES
 625                     (receiver_symlink_times && !(file->flags & FLAG_TIME_FAILED)) ||
 626 #endif
 627                     !S_ISLNK(file->mode);
 628
 629                 if (S_ISREG(file->mode) && F_LENGTH(file) != sxp->st.st_size)
 630                         iflags |= ITEM_REPORT_SIZE;
 631                 if ((iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !keep_time
 632                   && !(iflags & ITEM_MATCHED)
 633                   && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
 634                  || (keep_time && cmp_time(file->modtime, sxp->st.st_mtime) != 0))
 635                         iflags |= ITEM_REPORT_TIME;
 636 #if !defined HAVE_LCHMOD && !defined HAVE_SETATTRLIST
 637                 if (S_ISLNK(file->mode)) {
 638                         ;
 639                 } else
 640 #endif
 641                 if ((preserve_perms || preserve_executability)
 642                  && !BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
 643                         iflags |= ITEM_REPORT_PERMS;
 644                 if (uid_ndx && am_root && (uid_t)F_OWNER(file) != sxp->st.st_uid)
 645                         iflags |= ITEM_REPORT_OWNER;
 646                 if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP)
 647                     && sxp->st.st_gid != (gid_t)F_GROUP(file))
 648                         iflags |= ITEM_REPORT_GROUP;
 649 #ifdef SUPPORT_ACLS
 650                 if (preserve_acls && !S_ISLNK(file->mode)) {
 651                         if (!ACL_READY(*sxp))
 652                                 get_acl(fnamecmp, sxp);
 653                         if (set_acl(NULL, file, sxp) == 0)
 654                                 iflags |= ITEM_REPORT_ACL;
 655                 }
 656 #endif
 657 #ifdef SUPPORT_XATTRS
 658                 if (preserve_xattrs) {
 659                         if (!XATTR_READY(*sxp))
 660                                 get_xattr(fnamecmp, sxp);
 661                         if (xattr_diff(file, sxp, 1))
 662                                 iflags |= ITEM_REPORT_XATTR;
 663                 }
 664 #endif
 665         } else {
 666 #ifdef SUPPORT_XATTRS
 667                 if (preserve_xattrs && xattr_diff(file, NULL, 1))
 668                         iflags |= ITEM_REPORT_XATTR;
 669 #endif
 670                 iflags |= ITEM_IS_NEW;
 671         }
 672
 673         iflags &= 0xffff;
 674         if ((iflags & (SIGNIFICANT_ITEM_FLAGS|ITEM_REPORT_XATTR) || verbose > 1
 675           || stdout_format_has_i > 1 || (xname && *xname)) && !read_batch) {
 676                 if (protocol_version >= 29) {
 677                         if (ndx >= 0)
 678                                 write_ndx(sock_f_out, ndx);
 679                         write_shortint(sock_f_out, iflags);
 680                         if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
 681                                 write_byte(sock_f_out, fnamecmp_type);
 682                         if (iflags & ITEM_XNAME_FOLLOWS)
 683                                 write_vstring(sock_f_out, xname, strlen(xname));
 684 #ifdef SUPPORT_XATTRS
 685                         if (iflags & ITEM_REPORT_XATTR && !dry_run)
 686                                 send_xattr_request(NULL, file, sock_f_out);
 687 #endif
 688                 } else if (ndx >= 0) {
 689                         enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
 690                         log_item(code, file, &stats, iflags, xname);
 691                 }
 692         }
 693 }
 694
 695
 696 /* Perform our quick-check heuristic for determining if a file is unchanged. */
 697 int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
 698 {
 699         if (st->st_size != F_LENGTH(file))
 700                 return 0;
 701
 702         /* if always checksum is set then we use the checksum instead
 703            of the file time to determine whether to sync */
 704         if (always_checksum > 0 && S_ISREG(st->st_mode)) {
 705                 char sum[MAX_DIGEST_LEN];
 706                 file_checksum(fn, sum, st->st_size);
 707                 return memcmp(sum, F_SUM(file), checksum_len) == 0;
 708         }
 709
 710         if (size_only > 0)
 711                 return 1;
 712
 713         if (ignore_times)
 714                 return 0;
 715
 716         return cmp_time(st->st_mtime, file->modtime) == 0;
 717 }
 718
 719
 720 /*
 721  * set (initialize) the size entries in the per-file sum_struct
 722  * calculating dynamic block and checksum sizes.
 723  *
 724  * This is only called from generate_and_send_sums() but is a separate
 725  * function to encapsulate the logic.
 726  *
 727  * The block size is a rounded square root of file length.
 728  *
 729  * The checksum size is determined according to:
 730  *     blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
 731  * provided by Donovan Baarda which gives a probability of rsync
 732  * algorithm corrupting data and falling back using the whole md4
 733  * checksums.
 734  *
 735  * This might be made one of several selectable heuristics.
 736  */
 737 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
 738 {
 739         int32 blength;
 740         int s2length;
 741
 742         if (block_size)
 743                 blength = block_size;
 744         else if (len <= BLOCK_SIZE * BLOCK_SIZE)
 745                 blength = BLOCK_SIZE;
 746         else {
 747                 int32 c;
 748                 int64 l;
 749                 int cnt;
 750                 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
 751                 if (cnt >= 31 || c >= MAX_BLOCK_SIZE)
 752                         blength = MAX_BLOCK_SIZE;
 753                 else {
 754                     blength = 0;
 755                     do {
 756                             blength |= c;
 757                             if (len < (int64)blength * blength)
 758                                     blength &= ~c;
 759                             c >>= 1;
 760                     } while (c >= 8);   /* round to multiple of 8 */
 761                     blength = MAX(blength, BLOCK_SIZE);
 762                 }
 763         }
 764
 765         if (protocol_version < 27) {
 766                 s2length = csum_length;
 767         } else if (csum_length == SUM_LENGTH) {
 768                 s2length = SUM_LENGTH;
 769         } else {
 770                 int32 c;
 771                 int64 l;
 772                 int b = BLOCKSUM_BIAS;
 773                 for (l = len; l >>= 1; b += 2) {}
 774                 for (c = blength; (c >>= 1) && b; b--) {}
 775                 /* add a bit, subtract rollsum, round up. */
 776                 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
 777                 s2length = MAX(s2length, csum_length);
 778                 s2length = MIN(s2length, SUM_LENGTH);
 779         }
 780
 781         sum->flength    = len;
 782         sum->blength    = blength;
 783         sum->s2length   = s2length;
 784         sum->remainder  = (int32)(len % blength);
 785         sum->count      = (int32)(len / blength) + (sum->remainder != 0);
 786
 787         if (sum->count && verbose > 2) {
 788                 rprintf(FINFO,
 789                         "count=%.0f rem=%ld blength=%ld s2length=%d flength=%.0f\n",
 790                         (double)sum->count, (long)sum->remainder, (long)sum->blength,
 791                         sum->s2length, (double)sum->flength);
 792         }
 793 }
 794
 795
 796 /*
 797  * Generate and send a stream of signatures/checksums that describe a buffer
 798  *
 799  * Generate approximately one checksum every block_len bytes.
 800  */
 801 static void generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
 802 {
 803         int32 i;
 804         struct map_struct *mapbuf;
 805         struct sum_struct sum;
 806         OFF_T offset = 0;
 807
 808         sum_sizes_sqroot(&sum, len);
 809         write_sum_head(f_out, &sum);
 810
 811         if (append_mode > 0 && f_copy < 0)
 812                 return;
 813
 814         if (len > 0)
 815                 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
 816         else
 817                 mapbuf = NULL;
 818
 819         for (i = 0; i < sum.count; i++) {
 820                 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
 821                 char *map = map_ptr(mapbuf, offset, n1);
 822                 char sum2[SUM_LENGTH];
 823                 uint32 sum1;
 824
 825                 len -= n1;
 826                 offset += n1;
 827
 828                 if (f_copy >= 0) {
 829                         full_write(f_copy, map, n1);
 830                         if (append_mode > 0)
 831                                 continue;
 832                 }
 833
 834                 sum1 = get_checksum1(map, n1);
 835                 get_checksum2(map, n1, sum2);
 836
 837                 if (verbose > 3) {
 838                         rprintf(FINFO,
 839                                 "chunk[%.0f] offset=%.0f len=%ld sum1=%08lx\n",
 840                                 (double)i, (double)offset - n1, (long)n1,
 841                                 (unsigned long)sum1);
 842                 }
 843                 write_int(f_out, sum1);
 844                 write_buf(f_out, sum2, sum.s2length);
 845         }
 846
 847         if (mapbuf)
 848                 unmap_file(mapbuf);
 849 }
 850
 851
 852 /* Try to find a filename in the same dir as "fname" with a similar name. */
 853 static int find_fuzzy(struct file_struct *file, struct file_list *dirlist)
 854 {
 855         int fname_len, fname_suf_len;
 856         const char *fname_suf, *fname = file->basename;
 857         uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
 858         int j, lowest_j = -1;
 859
 860         fname_len = strlen(fname);
 861         fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
 862
 863         for (j = 0; j < dirlist->used; j++) {
 864                 struct file_struct *fp = dirlist->files[j];
 865                 const char *suf, *name;
 866                 int len, suf_len;
 867                 uint32 dist;
 868
 869                 if (!S_ISREG(fp->mode) || !F_LENGTH(fp)
 870                  || fp->flags & FLAG_FILE_SENT)
 871                         continue;
 872
 873                 name = fp->basename;
 874
 875                 if (F_LENGTH(fp) == F_LENGTH(file)
 876                     && cmp_time(fp->modtime, file->modtime) == 0) {
 877                         if (verbose > 4) {
 878                                 rprintf(FINFO,
 879                                         "fuzzy size/modtime match for %s\n",
 880                                         name);
 881                         }
 882                         return j;
 883                 }
 884
 885                 len = strlen(name);
 886                 suf = find_filename_suffix(name, len, &suf_len);
 887
 888                 dist = fuzzy_distance(name, len, fname, fname_len);
 889                 /* Add some extra weight to how well the suffixes match. */
 890                 dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len)
 891                       * 10;
 892                 if (verbose > 4) {
 893                         rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
 894                                 name, (int)(dist>>16), (int)(dist&0xFFFF));
 895                 }
 896                 if (dist <= lowest_dist) {
 897                         lowest_dist = dist;
 898                         lowest_j = j;
 899                 }
 900         }
 901
 902         return lowest_j;
 903 }
 904
 905 /* Copy a file found in our --copy-dest handling. */
 906 static int copy_altdest_file(const char *src, const char *dest, struct file_struct *file)
 907 {
 908         char buf[MAXPATHLEN];
 909         const char *copy_to, *partialptr;
 910         int ok, fd_w;
 911
 912         if (inplace) {
 913                 /* Let copy_file open the destination in place. */
 914                 fd_w = -1;
 915                 copy_to = dest;
 916         } else {
 917                 fd_w = open_tmpfile(buf, dest, file);
 918                 if (fd_w < 0)
 919                         return -1;
 920                 copy_to = buf;
 921         }
 922         cleanup_set(copy_to, NULL, NULL, -1, -1);
 923         if (copy_file(src, copy_to, fd_w, file->mode, 0) < 0) {
 924                 if (verbose) {
 925                         rsyserr(FINFO, errno, "copy_file %s => %s",
 926                                 full_fname(src), copy_to);
 927                 }
 928                 /* Try to clean up. */
 929                 unlink(copy_to);
 930                 cleanup_disable();
 931                 return -1;
 932         }
 933         partialptr = partial_dir ? partial_dir_fname(dest) : NULL;
 934         ok = finish_transfer(dest, copy_to, src, partialptr, file, 1, 0);
 935         cleanup_disable();
 936         return ok ? 0 : -1;
 937 }
 938
 939 /* This is only called for regular files.  We return -2 if we've finished
 940  * handling the file, -1 if no dest-linking occurred, or a non-negative
 941  * value if we found an alternate basis file. */
 942 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
 943                          char *cmpbuf, stat_x *sxp, int itemizing,
 944                          enum logcode code)
 945 {
 946         int best_match = -1;
 947         int match_level = 0;
 948         int j = 0;
 949
 950         do {
 951                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 952                 if (link_stat(cmpbuf, &sxp->st, 0) < 0 || !S_ISREG(sxp->st.st_mode))
 953                         continue;
 954                 switch (match_level) {
 955                 case 0:
 956                         best_match = j;
 957                         match_level = 1;
 958                         /* FALL THROUGH */
 959                 case 1:
 960                         if (!unchanged_file(cmpbuf, file, &sxp->st))
 961                                 continue;
 962                         best_match = j;
 963                         match_level = 2;
 964                         /* FALL THROUGH */
 965                 case 2:
 966                         if (!unchanged_attrs(cmpbuf, file, sxp))
 967                                 continue;
 968                         best_match = j;
 969                         match_level = 3;
 970                         break;
 971                 }
 972                 break;
 973         } while (basis_dir[++j] != NULL);
 974
 975         if (!match_level)
 976                 return -1;
 977
 978         if (j != best_match) {
 979                 j = best_match;
 980                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 981                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
 982                         return -1;
 983         }
 984
 985         if (match_level == 3 && !copy_dest) {
 986 #ifdef SUPPORT_HARD_LINKS
 987                 if (link_dest) {
 988                         if (!hard_link_one(file, fname, cmpbuf, 1))
 989                                 goto try_a_copy;
 990                         if (preserve_hard_links && F_IS_HLINKED(file))
 991                                 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, j);
 992                         if (!maybe_ATTRS_REPORT && (verbose > 1 || stdout_format_has_i > 1)) {
 993                                 itemize(cmpbuf, file, ndx, 1, sxp,
 994                                         ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS,
 995                                         0, "");
 996                         }
 997                 } else
 998 #endif
 999                 if (itemizing)
1000                         itemize(cmpbuf, file, ndx, 0, sxp, 0, 0, NULL);
1001                 if (verbose > 1 && maybe_ATTRS_REPORT)
1002                         rprintf(FCLIENT, "%s is uptodate\n", fname);
1003                 return -2;
1004         }
1005
1006         if (match_level >= 2) {
1007 #ifdef SUPPORT_HARD_LINKS
1008           try_a_copy: /* Copy the file locally. */
1009 #endif
1010                 if (!dry_run && copy_altdest_file(cmpbuf, fname, file) < 0)
1011                         return -1;
1012                 if (itemizing)
1013                         itemize(cmpbuf, file, ndx, 0, sxp, ITEM_LOCAL_CHANGE, 0, NULL);
1014                 if (maybe_ATTRS_REPORT
1015                  && ((!itemizing && verbose && match_level == 2)
1016                   || (verbose > 1 && match_level == 3))) {
1017                         code = match_level == 3 ? FCLIENT : FINFO;
1018                         rprintf(code, "%s%s\n", fname,
1019                                 match_level == 3 ? " is uptodate" : "");
1020                 }
1021 #ifdef SUPPORT_HARD_LINKS
1022                 if (preserve_hard_links && F_IS_HLINKED(file))
1023                         finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, -1);
1024 #endif
1025                 return -2;
1026         }
1027
1028         return FNAMECMP_BASIS_DIR_LOW + j;
1029 }
1030
1031 /* This is only called for non-regular files.  We return -2 if we've finished
1032  * handling the file, or -1 if no dest-linking occurred, or a non-negative
1033  * value if we found an alternate basis file. */
1034 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
1035                          char *cmpbuf, stat_x *sxp, int itemizing,
1036                          enum logcode code)
1037 {
1038         char lnk[MAXPATHLEN];
1039         int best_match = -1;
1040         int match_level = 0;
1041         enum nonregtype type;
1042         uint32 *devp;
1043         int len, j = 0;
1044
1045 #ifndef SUPPORT_LINKS
1046         if (S_ISLNK(file->mode))
1047                 return -1;
1048 #endif
1049         if (S_ISDIR(file->mode)) {
1050                 type = TYPE_DIR;
1051         } else if (IS_SPECIAL(file->mode))
1052                 type = TYPE_SPECIAL;
1053         else if (IS_DEVICE(file->mode))
1054                 type = TYPE_DEVICE;
1055 #ifdef SUPPORT_LINKS
1056         else if (S_ISLNK(file->mode))
1057                 type = TYPE_SYMLINK;
1058 #endif
1059         else {
1060                 rprintf(FERROR,
1061                         "internal: try_dests_non() called with invalid mode (%o)\n",
1062                         (int)file->mode);
1063                 exit_cleanup(RERR_UNSUPPORTED);
1064         }
1065
1066         do {
1067                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1068                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1069                         continue;
1070                 switch (type) {
1071                 case TYPE_DIR:
1072                         if (!S_ISDIR(sxp->st.st_mode))
1073                                 continue;
1074                         break;
1075                 case TYPE_SPECIAL:
1076                         if (!IS_SPECIAL(sxp->st.st_mode))
1077                                 continue;
1078                         break;
1079                 case TYPE_DEVICE:
1080                         if (!IS_DEVICE(sxp->st.st_mode))
1081                                 continue;
1082                         break;
1083 #ifdef SUPPORT_LINKS
1084                 case TYPE_SYMLINK:
1085                         if (!S_ISLNK(sxp->st.st_mode))
1086                                 continue;
1087                         break;
1088 #endif
1089                 }
1090                 if (match_level < 1) {
1091                         match_level = 1;
1092                         best_match = j;
1093                 }
1094                 switch (type) {
1095                 case TYPE_DIR:
1096                         break;
1097                 case TYPE_SPECIAL:
1098                 case TYPE_DEVICE:
1099                         devp = F_RDEV_P(file);
1100                         if (sxp->st.st_rdev != MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)))
1101                                 continue;
1102                         break;
1103 #ifdef SUPPORT_LINKS
1104                 case TYPE_SYMLINK:
1105                         if ((len = readlink(cmpbuf, lnk, MAXPATHLEN-1)) <= 0)
1106                                 continue;
1107                         lnk[len] = '\0';
1108                         if (strcmp(lnk, F_SYMLINK(file)) != 0)
1109                                 continue;
1110                         break;
1111 #endif
1112                 }
1113                 if (match_level < 2) {
1114                         match_level = 2;
1115                         best_match = j;
1116                 }
1117                 if (unchanged_attrs(cmpbuf, file, sxp)) {
1118                         match_level = 3;
1119                         best_match = j;
1120                         break;
1121                 }
1122         } while (basis_dir[++j] != NULL);
1123
1124         if (!match_level)
1125                 return -1;
1126
1127         if (j != best_match) {
1128                 j = best_match;
1129                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1130                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1131                         return -1;
1132         }
1133
1134         if (match_level == 3) {
1135 #ifdef SUPPORT_HARD_LINKS
1136                 if (link_dest
1137 #ifndef CAN_HARDLINK_SYMLINK
1138                  && !S_ISLNK(file->mode)
1139 #endif
1140 #ifndef CAN_HARDLINK_SPECIAL
1141                  && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
1142 #endif
1143                  && !S_ISDIR(file->mode)) {
1144                         if (do_link(cmpbuf, fname) < 0) {
1145                                 rsyserr(FERROR_XFER, errno,
1146                                         "failed to hard-link %s with %s",
1147                                         cmpbuf, fname);
1148                                 return j;
1149                         }
1150                         if (preserve_hard_links && F_IS_HLINKED(file))
1151                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1152                 } else
1153 #endif
1154                         match_level = 2;
1155                 if (itemizing && stdout_format_has_i
1156                  && (verbose > 1 || stdout_format_has_i > 1)) {
1157                         int chg = compare_dest && type != TYPE_DIR ? 0
1158                             : ITEM_LOCAL_CHANGE
1159                              + (match_level == 3 ? ITEM_XNAME_FOLLOWS : 0);
1160                         char *lp = match_level == 3 ? "" : NULL;
1161                         itemize(cmpbuf, file, ndx, 0, sxp, chg + ITEM_MATCHED, 0, lp);
1162                 }
1163                 if (verbose > 1 && maybe_ATTRS_REPORT) {
1164                         rprintf(FCLIENT, "%s%s is uptodate\n",
1165                                 fname, type == TYPE_DIR ? "/" : "");
1166                 }
1167                 return -2;
1168         }
1169
1170         return j;
1171 }
1172
1173 static void list_file_entry(struct file_struct *f)
1174 {
1175         char permbuf[PERMSTRING_SIZE];
1176         double len;
1177
1178         if (!F_IS_ACTIVE(f)) {
1179                 /* this can happen if duplicate names were removed */
1180                 return;
1181         }
1182
1183         permstring(permbuf, f->mode);
1184         len = F_LENGTH(f);
1185
1186         /* TODO: indicate '+' if the entry has an ACL. */
1187
1188 #ifdef SUPPORT_LINKS
1189         if (preserve_links && S_ISLNK(f->mode)) {
1190                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
1191                         permbuf, len, timestring(f->modtime),
1192                         f_name(f, NULL), F_SYMLINK(f));
1193         } else
1194 #endif
1195         {
1196                 rprintf(FINFO, "%s %11.0f %s %s\n",
1197                         permbuf, len, timestring(f->modtime),
1198                         f_name(f, NULL));
1199         }
1200 }
1201
1202 static int phase = 0;
1203 static int dflt_perms;
1204
1205 /* Acts on the indicated item in cur_flist whose name is fname.  If a dir,
1206  * make sure it exists, and has the right permissions/timestamp info.  For
1207  * all other non-regular files (symlinks, etc.) we create them here.  For
1208  * regular files that have changed, we try to find a basis file and then
1209  * start sending checksums.  The ndx is the file's unique index value.
1210  *
1211  * When fname is non-null, it must point to a MAXPATHLEN buffer!
1212  *
1213  * Note that f_out is set to -1 when doing final directory-permission and
1214  * modification-time repair. */
1215 static void recv_generator(char *fname, struct file_struct *file, int ndx,
1216                            int itemizing, enum logcode code, int f_out)
1217 {
1218         static int missing_below = -1, excluded_below = -1;
1219         static const char *parent_dirname = "";
1220         static struct file_struct *missing_dir = NULL, *excluded_dir = NULL;
1221         static struct file_list *fuzzy_dirlist = NULL;
1222         static int need_fuzzy_dirlist = 0;
1223         struct file_struct *fuzzy_file = NULL;
1224         int fd = -1, f_copy = -1;
1225         stat_x sx, real_sx;
1226         STRUCT_STAT partial_st;
1227         struct file_struct *back_file = NULL;
1228         int statret, real_ret, stat_errno;
1229         char *fnamecmp, *partialptr, *backupptr = NULL;
1230         char fnamecmpbuf[MAXPATHLEN];
1231         uchar fnamecmp_type;
1232         int implied_dirs_are_missing = relative_paths && !implied_dirs && protocol_version < 30;
1233         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1234         int is_dir = !S_ISDIR(file->mode) ? 0
1235                    : inc_recurse && ndx != cur_flist->ndx_start - 1 ? -1
1236                    : 1;
1237
1238         if (verbose > 2)
1239                 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
1240
1241         if (list_only) {
1242                 if (is_dir < 0
1243                  || (is_dir && !implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1244                         return;
1245                 list_file_entry(file);
1246                 return;
1247         }
1248
1249         if (server_filter_list.head) {
1250                 int filtered = check_filter(&server_filter_list, fname, is_dir) < 0;
1251                 if (is_dir < 0 && filtered)
1252                         return;
1253                 if (excluded_below >= 0) {
1254                         if (F_DEPTH(file) > excluded_below
1255                          && (!implied_dirs_are_missing || f_name_has_prefix(file, excluded_dir)))
1256                                 goto skipping;
1257                         excluded_below = -1;
1258                 }
1259                 if (filtered) {
1260                         if (is_dir) {
1261                                 excluded_below = F_DEPTH(file);
1262                                 excluded_dir = file;
1263                         }
1264                   skipping:
1265                         rprintf(FERROR_XFER,
1266                                 "skipping daemon-excluded file \"%s\"\n",
1267                                 fname);
1268                         return;
1269                 }
1270         }
1271
1272         if (missing_below >= 0) {
1273                 if (F_DEPTH(file) <= missing_below
1274                  || (implied_dirs_are_missing && !f_name_has_prefix(file, missing_dir))) {
1275                         if (dry_run)
1276                                 dry_run--;
1277                         missing_below = -1;
1278                 } else if (!dry_run) {
1279                         if (is_dir)
1280                                 file->flags |= FLAG_MISSING_DIR;
1281                         return;
1282                 }
1283         }
1284 #ifdef SUPPORT_ACLS
1285         sx.acc_acl = sx.def_acl = NULL;
1286 #endif
1287 #ifdef SUPPORT_XATTRS
1288         sx.xattr = NULL;
1289 #endif
1290         if (dry_run > 1) {
1291                 if (fuzzy_dirlist) {
1292                         flist_free(fuzzy_dirlist);
1293                         fuzzy_dirlist = NULL;
1294                 }
1295                 parent_dirname = "";
1296                 statret = -1;
1297                 stat_errno = ENOENT;
1298         } else {
1299                 const char *dn = file->dirname ? file->dirname : ".";
1300                 if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
1301                         if (relative_paths && !implied_dirs
1302                          && do_stat(dn, &sx.st) < 0
1303                          && create_directory_path(fname) < 0) {
1304                                 rsyserr(FERROR_XFER, errno,
1305                                         "recv_generator: mkdir %s failed",
1306                                         full_fname(dn));
1307                         }
1308                         if (fuzzy_dirlist) {
1309                                 flist_free(fuzzy_dirlist);
1310                                 fuzzy_dirlist = NULL;
1311                         }
1312                         if (fuzzy_basis)
1313                                 need_fuzzy_dirlist = 1;
1314 #ifdef SUPPORT_ACLS
1315                         if (!preserve_perms)
1316                                 dflt_perms = default_perms_for_dir(dn);
1317 #endif
1318                 }
1319                 parent_dirname = dn;
1320
1321                 if (need_fuzzy_dirlist && S_ISREG(file->mode)) {
1322                         strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf);
1323                         fuzzy_dirlist = get_dirlist(fnamecmpbuf, -1, 1);
1324                         need_fuzzy_dirlist = 0;
1325                 }
1326
1327                 statret = link_stat(fname, &sx.st, keep_dirlinks && is_dir);
1328                 stat_errno = errno;
1329         }
1330
1331         if (ignore_non_existing > 0 && statret == -1 && stat_errno == ENOENT) {
1332                 if (is_dir) {
1333                         if (is_dir < 0)
1334                                 return;
1335                         if (missing_below < 0) {
1336                                 if (dry_run)
1337                                         dry_run++;
1338                                 missing_below = F_DEPTH(file);
1339                                 missing_dir = file;
1340                         }
1341                         file->flags |= FLAG_MISSING_DIR;
1342                 }
1343                 if (verbose > 1) {
1344                         rprintf(FINFO, "not creating new %s \"%s\"\n",
1345                                 is_dir ? "directory" : "file", fname);
1346                 }
1347                 return;
1348         }
1349
1350         if (statret == 0 && !(sx.st.st_mode & S_IWUSR)
1351          && !am_root && sx.st.st_uid == our_uid)
1352                 del_opts |= DEL_NO_UID_WRITE;
1353
1354         if (is_dir) {
1355                 if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
1356                         goto cleanup;
1357                 if (is_dir < 0) {
1358                         /* In inc_recurse mode we want to make sure any missing
1359                          * directories get created while we're still processing
1360                          * the parent dir (which allows us to touch the parent
1361                          * dir's mtime right away).  We will handle the dir in
1362                          * full later (right before we handle its contents). */
1363                         if (statret == 0
1364                          && (S_ISDIR(sx.st.st_mode)
1365                           || delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0))
1366                                 goto cleanup; /* Any errors get reported later. */
1367                         if (do_mkdir(fname, file->mode & 0700) == 0)
1368                                 file->flags |= FLAG_DIR_CREATED;
1369                         goto cleanup;
1370                 }
1371                 /* The file to be received is a directory, so we need
1372                  * to prepare appropriately.  If there is already a
1373                  * file of that name and it is *not* a directory, then
1374                  * we need to delete it.  If it doesn't exist, then
1375                  * (perhaps recursively) create it. */
1376                 if (statret == 0 && !S_ISDIR(sx.st.st_mode)) {
1377                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0)
1378                                 goto skipping_dir_contents;
1379                         statret = -1;
1380                 }
1381                 if (dry_run && statret != 0 && missing_below < 0) {
1382                         missing_below = F_DEPTH(file);
1383                         missing_dir = file;
1384                         dry_run++;
1385                 }
1386                 real_ret = statret;
1387                 real_sx = sx;
1388                 if (file->flags & FLAG_DIR_CREATED)
1389                         statret = -1;
1390                 if (!preserve_perms) { /* See comment in non-dir code below. */
1391                         file->mode = dest_mode(file->mode, sx.st.st_mode,
1392                                                dflt_perms, statret == 0);
1393                 }
1394                 if (statret != 0 && basis_dir[0] != NULL) {
1395                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1396                                               itemizing, code);
1397                         if (j == -2) {
1398                                 itemizing = 0;
1399                                 code = FNONE;
1400                         } else if (j >= 0)
1401                                 statret = 1;
1402                 }
1403                 if (itemizing && f_out != -1) {
1404                         itemize(fname, file, ndx, statret, &sx,
1405                                 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
1406                 }
1407                 if (real_ret != 0 && do_mkdir(fname,file->mode) < 0 && errno != EEXIST) {
1408                         if (!relative_paths || errno != ENOENT
1409                             || create_directory_path(fname) < 0
1410                             || (do_mkdir(fname, file->mode) < 0 && errno != EEXIST)) {
1411                                 rsyserr(FERROR_XFER, errno,
1412                                         "recv_generator: mkdir %s failed",
1413                                         full_fname(fname));
1414                           skipping_dir_contents:
1415                                 rprintf(FERROR,
1416                                     "*** Skipping any contents from this failed directory ***\n");
1417                                 missing_below = F_DEPTH(file);
1418                                 missing_dir = file;
1419                                 file->flags |= FLAG_MISSING_DIR;
1420                                 goto cleanup;
1421                         }
1422                 }
1423                 if (set_file_attrs(fname, file, real_ret ? NULL : &real_sx, NULL, 0)
1424                     && verbose && code != FNONE && f_out != -1)
1425                         rprintf(code, "%s/\n", fname);
1426
1427                 /* We need to ensure that the dirs in the transfer have writable
1428                  * permissions during the time we are putting files within them.
1429                  * This is then fixed after the transfer is done. */
1430 #ifdef HAVE_CHMOD
1431                 if (!am_root && !(file->mode & S_IWUSR) && dir_tweaking) {
1432                         mode_t mode = file->mode | S_IWUSR;
1433                         if (do_chmod(fname, mode) < 0) {
1434                                 rsyserr(FERROR_XFER, errno,
1435                                         "failed to modify permissions on %s",
1436                                         full_fname(fname));
1437                         }
1438                         need_retouch_dir_perms = 1;
1439                 }
1440 #endif
1441
1442                 if (real_ret != 0 && one_file_system)
1443                         real_sx.st.st_dev = filesystem_dev;
1444                 if (inc_recurse) {
1445                         if (one_file_system) {
1446                                 uint32 *devp = F_DIR_DEV_P(file);
1447                                 DEV_MAJOR(devp) = major(real_sx.st.st_dev);
1448                                 DEV_MINOR(devp) = minor(real_sx.st.st_dev);
1449                         }
1450                 }
1451                 else if (delete_during && f_out != -1 && !phase && dry_run < 2
1452                     && (file->flags & FLAG_CONTENT_DIR))
1453                         delete_in_dir(fname, file, &real_sx.st.st_dev);
1454                 goto cleanup;
1455         }
1456
1457         /* If we're not preserving permissions, change the file-list's
1458          * mode based on the local permissions and some heuristics. */
1459         if (!preserve_perms) {
1460                 int exists = statret == 0 && !S_ISDIR(sx.st.st_mode);
1461                 file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms,
1462                                        exists);
1463         }
1464
1465 #ifdef SUPPORT_HARD_LINKS
1466         if (preserve_hard_links && F_HLINK_NOT_FIRST(file)
1467          && hard_link_check(file, ndx, fname, statret, &sx, itemizing, code))
1468                 goto cleanup;
1469 #endif
1470
1471         if (preserve_links && S_ISLNK(file->mode)) {
1472 #ifdef SUPPORT_LINKS
1473                 const char *sl = F_SYMLINK(file);
1474                 if (safe_symlinks && unsafe_symlink(sl, fname)) {
1475                         if (verbose) {
1476                                 if (solo_file)
1477                                         fname = f_name(file, NULL);
1478                                 rprintf(FINFO,
1479                                         "ignoring unsafe symlink %s -> \"%s\"\n",
1480                                         full_fname(fname), sl);
1481                         }
1482                         return;
1483                 }
1484                 if (statret == 0) {
1485                         char lnk[MAXPATHLEN];
1486                         int len;
1487
1488                         if (!S_ISLNK(sx.st.st_mode))
1489                                 statret = -1;
1490                         else if ((len = readlink(fname, lnk, MAXPATHLEN-1)) > 0
1491                               && strncmp(lnk, sl, len) == 0 && sl[len] == '\0') {
1492                                 /* The link is pointing to the right place. */
1493                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1494                                 if (itemizing)
1495                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1496 #if defined SUPPORT_HARD_LINKS && defined CAN_HARDLINK_SYMLINK
1497                                 if (preserve_hard_links && F_IS_HLINKED(file))
1498                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1499 #endif
1500                                 if (remove_source_files == 1)
1501                                         goto return_with_success;
1502                                 goto cleanup;
1503                         }
1504                         /* Not the right symlink (or not a symlink), so
1505                          * delete it. */
1506                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_SYMLINK) != 0)
1507                                 goto cleanup;
1508                 } else if (basis_dir[0] != NULL) {
1509                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1510                                               itemizing, code);
1511                         if (j == -2) {
1512 #ifndef CAN_HARDLINK_SYMLINK
1513                                 if (link_dest) {
1514                                         /* Resort to --copy-dest behavior. */
1515                                 } else
1516 #endif
1517                                 if (!copy_dest)
1518                                         goto cleanup;
1519                                 itemizing = 0;
1520                                 code = FNONE;
1521                         } else if (j >= 0)
1522                                 statret = 1;
1523                 }
1524 #ifdef SUPPORT_HARD_LINKS
1525                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1526                         cur_flist->in_progress++;
1527                         goto cleanup;
1528                 }
1529 #endif
1530                 if (do_symlink(sl, fname) != 0) {
1531                         rsyserr(FERROR_XFER, errno, "symlink %s -> \"%s\" failed",
1532                                 full_fname(fname), sl);
1533                 } else {
1534                         set_file_attrs(fname, file, NULL, NULL, 0);
1535                         if (itemizing) {
1536                                 itemize(fname, file, ndx, statret, &sx,
1537                                         ITEM_LOCAL_CHANGE, 0, NULL);
1538                         }
1539                         if (code != FNONE && verbose)
1540                                 rprintf(code, "%s -> %s\n", fname, sl);
1541 #ifdef SUPPORT_HARD_LINKS
1542                         if (preserve_hard_links && F_IS_HLINKED(file))
1543                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1544 #endif
1545                         /* This does not check remove_source_files == 1
1546                          * because this is one of the items that the old
1547                          * --remove-sent-files option would remove. */
1548                         if (remove_source_files)
1549                                 goto return_with_success;
1550                 }
1551 #endif
1552                 goto cleanup;
1553         }
1554
1555         if ((am_root && preserve_devices && IS_DEVICE(file->mode))
1556          || (preserve_specials && IS_SPECIAL(file->mode))) {
1557                 uint32 *devp = F_RDEV_P(file);
1558                 dev_t rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
1559                 if (statret == 0) {
1560                         int del_for_flag;
1561                         if (IS_DEVICE(file->mode)) {
1562                                 if (!IS_DEVICE(sx.st.st_mode))
1563                                         statret = -1;
1564                                 del_for_flag = DEL_FOR_DEVICE;
1565                         } else {
1566                                 if (!IS_SPECIAL(sx.st.st_mode))
1567                                         statret = -1;
1568                                 del_for_flag = DEL_FOR_SPECIAL;
1569                         }
1570                         if (statret == 0
1571                          && BITS_EQUAL(sx.st.st_mode, file->mode, _S_IFMT)
1572                          && sx.st.st_rdev == rdev) {
1573                                 /* The device or special file is identical. */
1574                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1575                                 if (itemizing)
1576                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1577 #ifdef SUPPORT_HARD_LINKS
1578                                 if (preserve_hard_links && F_IS_HLINKED(file))
1579                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1580 #endif
1581                                 if (remove_source_files == 1)
1582                                         goto return_with_success;
1583                                 goto cleanup;
1584                         }
1585                         if (delete_item(fname, sx.st.st_mode, del_opts | del_for_flag) != 0)
1586                                 goto cleanup;
1587                 } else if (basis_dir[0] != NULL) {
1588                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1589                                               itemizing, code);
1590                         if (j == -2) {
1591 #ifndef CAN_HARDLINK_SPECIAL
1592                                 if (link_dest) {
1593                                         /* Resort to --copy-dest behavior. */
1594                                 } else
1595 #endif
1596                                 if (!copy_dest)
1597                                         goto cleanup;
1598                                 itemizing = 0;
1599                                 code = FNONE;
1600                         } else if (j >= 0)
1601                                 statret = 1;
1602                 }
1603 #ifdef SUPPORT_HARD_LINKS
1604                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1605                         cur_flist->in_progress++;
1606                         goto cleanup;
1607                 }
1608 #endif
1609                 if (verbose > 2) {
1610                         rprintf(FINFO, "mknod(%s, 0%o, [%ld,%ld])\n",
1611                                 fname, (int)file->mode,
1612                                 (long)major(rdev), (long)minor(rdev));
1613                 }
1614                 if (do_mknod(fname, file->mode, rdev) < 0) {
1615                         rsyserr(FERROR_XFER, errno, "mknod %s failed",
1616                                 full_fname(fname));
1617                 } else {
1618                         set_file_attrs(fname, file, NULL, NULL, 0);
1619                         if (itemizing) {
1620                                 itemize(fname, file, ndx, statret, &sx,
1621                                         ITEM_LOCAL_CHANGE, 0, NULL);
1622                         }
1623                         if (code != FNONE && verbose)
1624                                 rprintf(code, "%s\n", fname);
1625 #ifdef SUPPORT_HARD_LINKS
1626                         if (preserve_hard_links && F_IS_HLINKED(file))
1627                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1628 #endif
1629                         if (remove_source_files == 1)
1630                                 goto return_with_success;
1631                 }
1632                 goto cleanup;
1633         }
1634
1635         if (!S_ISREG(file->mode)) {
1636                 if (solo_file)
1637                         fname = f_name(file, NULL);
1638                 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1639                 goto cleanup;
1640         }
1641
1642         if (max_size > 0 && F_LENGTH(file) > max_size) {
1643                 if (verbose > 1) {
1644                         if (solo_file)
1645                                 fname = f_name(file, NULL);
1646                         rprintf(FINFO, "%s is over max-size\n", fname);
1647                 }
1648                 goto cleanup;
1649         }
1650         if (min_size > 0 && F_LENGTH(file) < min_size) {
1651                 if (verbose > 1) {
1652                         if (solo_file)
1653                                 fname = f_name(file, NULL);
1654                         rprintf(FINFO, "%s is under min-size\n", fname);
1655                 }
1656                 goto cleanup;
1657         }
1658
1659         if (ignore_existing > 0 && statret == 0) {
1660                 if (verbose > 1)
1661                         rprintf(FINFO, "%s exists\n", fname);
1662                 goto cleanup;
1663         }
1664
1665         if (update_only > 0 && statret == 0
1666             && cmp_time(sx.st.st_mtime, file->modtime) > 0) {
1667                 if (verbose > 1)
1668                         rprintf(FINFO, "%s is newer\n", fname);
1669                 goto cleanup;
1670         }
1671
1672         fnamecmp = fname;
1673         fnamecmp_type = FNAMECMP_FNAME;
1674
1675         if (statret == 0 && !S_ISREG(sx.st.st_mode)) {
1676                 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_FILE) != 0)
1677                         goto cleanup;
1678                 statret = -1;
1679                 stat_errno = ENOENT;
1680         }
1681
1682         if (statret != 0 && basis_dir[0] != NULL) {
1683                 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &sx,
1684                                       itemizing, code);
1685                 if (j == -2) {
1686                         if (remove_source_files == 1)
1687                                 goto return_with_success;
1688                         goto cleanup;
1689                 }
1690                 if (j >= 0) {
1691                         fnamecmp = fnamecmpbuf;
1692                         fnamecmp_type = j;
1693                         statret = 0;
1694                 }
1695         }
1696
1697         real_ret = statret;
1698         real_sx = sx;
1699
1700         if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1701             && link_stat(partialptr, &partial_st, 0) == 0
1702             && S_ISREG(partial_st.st_mode)) {
1703                 if (statret != 0)
1704                         goto prepare_to_open;
1705         } else
1706                 partialptr = NULL;
1707
1708         if (statret != 0 && fuzzy_dirlist && dry_run <= 1) {
1709                 int j = find_fuzzy(file, fuzzy_dirlist);
1710                 if (j >= 0) {
1711                         fuzzy_file = fuzzy_dirlist->files[j];
1712                         f_name(fuzzy_file, fnamecmpbuf);
1713                         if (verbose > 2) {
1714                                 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1715                                         fname, fnamecmpbuf);
1716                         }
1717                         sx.st.st_size = F_LENGTH(fuzzy_file);
1718                         statret = 0;
1719                         fnamecmp = fnamecmpbuf;
1720                         fnamecmp_type = FNAMECMP_FUZZY;
1721                 }
1722         }
1723
1724         if (statret != 0) {
1725 #ifdef SUPPORT_HARD_LINKS
1726                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1727                         cur_flist->in_progress++;
1728                         goto cleanup;
1729                 }
1730 #endif
1731                 if (stat_errno == ENOENT)
1732                         goto notify_others;
1733                 rsyserr(FERROR_XFER, stat_errno, "recv_generator: failed to stat %s",
1734                         full_fname(fname));
1735                 goto cleanup;
1736         }
1737
1738         if (append_mode > 0 && sx.st.st_size >= F_LENGTH(file))
1739                 goto cleanup;
1740
1741         if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1742                 ;
1743         else if (fnamecmp_type == FNAMECMP_FUZZY)
1744                 ;
1745         else if (unchanged_file(fnamecmp, file, &sx.st)) {
1746                 if (partialptr) {
1747                         do_unlink(partialptr);
1748                         handle_partial_dir(partialptr, PDIR_DELETE);
1749                 }
1750                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1751                 if (itemizing)
1752                         itemize(fnamecmp, file, ndx, statret, &sx, 0, 0, NULL);
1753 #ifdef SUPPORT_HARD_LINKS
1754                 if (preserve_hard_links && F_IS_HLINKED(file))
1755                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1756 #endif
1757                 if (remove_source_files != 1)
1758                         goto cleanup;
1759           return_with_success:
1760                 if (!dry_run)
1761                         send_msg_int(MSG_SUCCESS, ndx);
1762                 goto cleanup;
1763         }
1764
1765   prepare_to_open:
1766         if (partialptr) {
1767                 sx.st = partial_st;
1768                 fnamecmp = partialptr;
1769                 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1770                 statret = 0;
1771         }
1772
1773         if (!do_xfers)
1774                 goto notify_others;
1775
1776         if (read_batch || whole_file) {
1777                 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1778                         if (!(backupptr = get_backup_name(fname)))
1779                                 goto cleanup;
1780                         if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
1781                                 goto pretend_missing;
1782                         if (copy_file(fname, backupptr, -1, back_file->mode, 1) < 0) {
1783                                 unmake_file(back_file);
1784                                 back_file = NULL;
1785                                 goto cleanup;
1786                         }
1787                 }
1788                 goto notify_others;
1789         }
1790
1791         if (fuzzy_dirlist) {
1792                 int j = flist_find(fuzzy_dirlist, file);
1793                 if (j >= 0) /* don't use changing file as future fuzzy basis */
1794                         fuzzy_dirlist->files[j]->flags |= FLAG_FILE_SENT;
1795         }
1796
1797         /* open the file */
1798         if ((fd = do_open(fnamecmp, O_RDONLY, 0)) < 0) {
1799                 rsyserr(FERROR, errno, "failed to open %s, continuing",
1800                         full_fname(fnamecmp));
1801           pretend_missing:
1802                 /* pretend the file didn't exist */
1803 #ifdef SUPPORT_HARD_LINKS
1804                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1805                         cur_flist->in_progress++;
1806                         goto cleanup;
1807                 }
1808 #endif
1809                 statret = real_ret = -1;
1810                 goto notify_others;
1811         }
1812
1813         if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1814                 if (!(backupptr = get_backup_name(fname))) {
1815                         close(fd);
1816                         goto cleanup;
1817                 }
1818                 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1819                         close(fd);
1820                         goto pretend_missing;
1821                 }
1822                 if (robust_unlink(backupptr) && errno != ENOENT) {
1823                         rsyserr(FERROR_XFER, errno, "unlink %s",
1824                                 full_fname(backupptr));
1825                         unmake_file(back_file);
1826                         back_file = NULL;
1827                         close(fd);
1828                         goto cleanup;
1829                 }
1830                 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0
1831                  && (errno != ENOENT || make_bak_dir(backupptr) < 0
1832                   || (f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0)) {
1833                         rsyserr(FERROR_XFER, errno, "open %s",
1834                                 full_fname(backupptr));
1835                         unmake_file(back_file);
1836                         back_file = NULL;
1837                         close(fd);
1838                         goto cleanup;
1839                 }
1840                 fnamecmp_type = FNAMECMP_BACKUP;
1841         }
1842
1843         if (verbose > 3) {
1844                 rprintf(FINFO, "gen mapped %s of size %.0f\n",
1845                         fnamecmp, (double)sx.st.st_size);
1846         }
1847
1848         if (verbose > 2)
1849                 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1850
1851   notify_others:
1852         if (remove_source_files && !delay_updates && !phase)
1853                 increment_active_files(ndx, itemizing, code);
1854         if (inc_recurse && !dry_run)
1855                 cur_flist->in_progress++;
1856 #ifdef SUPPORT_HARD_LINKS
1857         if (preserve_hard_links && F_IS_HLINKED(file))
1858                 file->flags |= FLAG_FILE_SENT;
1859 #endif
1860         write_ndx(f_out, ndx);
1861         if (itemizing) {
1862                 int iflags = ITEM_TRANSFER;
1863                 if (always_checksum > 0)
1864                         iflags |= ITEM_REPORT_CHECKSUM;
1865                 if (fnamecmp_type != FNAMECMP_FNAME)
1866                         iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1867                 if (fnamecmp_type == FNAMECMP_FUZZY)
1868                         iflags |= ITEM_XNAME_FOLLOWS;
1869                 itemize(fnamecmp, file, -1, real_ret, &real_sx, iflags, fnamecmp_type,
1870                         fuzzy_file ? fuzzy_file->basename : NULL);
1871 #ifdef SUPPORT_ACLS
1872                 if (preserve_acls)
1873                         free_acl(&real_sx);
1874 #endif
1875 #ifdef SUPPORT_XATTRS
1876                 if (preserve_xattrs)
1877                         free_xattr(&real_sx);
1878 #endif
1879         }
1880
1881         if (!do_xfers) {
1882 #ifdef SUPPORT_HARD_LINKS
1883                 if (preserve_hard_links && F_IS_HLINKED(file))
1884                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1885 #endif
1886                 goto cleanup;
1887         }
1888         if (read_batch)
1889                 goto cleanup;
1890
1891         if (statret != 0 || whole_file)
1892                 write_sum_head(f_out, NULL);
1893         else {
1894                 generate_and_send_sums(fd, sx.st.st_size, f_out, f_copy);
1895                 close(fd);
1896         }
1897
1898   cleanup:
1899         if (back_file) {
1900                 if (f_copy >= 0)
1901                         close(f_copy);
1902                 set_file_attrs(backupptr, back_file, NULL, NULL, 0);
1903                 if (verbose > 1) {
1904                         rprintf(FINFO, "backed up %s to %s\n",
1905                                 fname, backupptr);
1906                 }
1907                 unmake_file(back_file);
1908         }
1909
1910 #ifdef SUPPORT_ACLS
1911         if (preserve_acls)
1912                 free_acl(&sx);
1913 #endif
1914 #ifdef SUPPORT_XATTRS
1915         if (preserve_xattrs)
1916                 free_xattr(&sx);
1917 #endif
1918         return;
1919 }
1920
1921 static void touch_up_dirs(struct file_list *flist, int ndx)
1922 {
1923         static int counter = 0;
1924         struct file_struct *file;
1925         char *fname;
1926         int i, start, end;
1927
1928         if (ndx < 0) {
1929                 start = 0;
1930                 end = flist->used - 1;
1931         } else
1932                 start = end = ndx;
1933
1934         /* Fix any directory permissions that were modified during the
1935          * transfer and/or re-set any tweaked modified-time values. */
1936         for (i = start; i <= end; i++, counter++) {
1937                 file = flist->files[i];
1938                 if (!S_ISDIR(file->mode)
1939                  || (!implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1940                         continue;
1941                 if (verbose > 3) {
1942                         fname = f_name(file, NULL);
1943                         rprintf(FINFO, "touch_up_dirs: %s (%d)\n",
1944                                 NS(fname), i);
1945                 }
1946                 if (!F_IS_ACTIVE(file) || file->flags & FLAG_MISSING_DIR
1947                  || (!need_retouch_dir_times && file->mode & S_IWUSR))
1948                         continue;
1949                 fname = f_name(file, NULL);
1950                 if (!(file->mode & S_IWUSR))
1951                         do_chmod(fname, file->mode);
1952                 if (need_retouch_dir_times)
1953                         set_modtime(fname, file->modtime, file->mode);
1954                 if (allowed_lull && !(counter % lull_mod))
1955                         maybe_send_keepalive();
1956                 else if (!(counter & 0xFF))
1957                         maybe_flush_socket(0);
1958         }
1959 }
1960
1961 void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
1962 {
1963         struct file_struct *file;
1964         struct file_list *flist;
1965         char fbuf[MAXPATHLEN];
1966         int ndx;
1967
1968         while (1) {
1969 #ifdef SUPPORT_HARD_LINKS
1970                 if (preserve_hard_links && (ndx = get_hlink_num()) != -1) {
1971                         flist = flist_for_ndx(ndx);
1972                         assert(flist != NULL);
1973                         file = flist->files[ndx - flist->ndx_start];
1974                         assert(file->flags & FLAG_HLINKED);
1975                         finish_hard_link(file, f_name(file, fbuf), ndx, NULL, itemizing, code, -1);
1976                         flist->in_progress--;
1977                         continue;
1978                 }
1979 #endif
1980
1981                 if (check_redo && (ndx = get_redo_num()) != -1) {
1982                         csum_length = SUM_LENGTH;
1983                         max_size = -max_size;
1984                         min_size = -min_size;
1985                         ignore_existing = -ignore_existing;
1986                         ignore_non_existing = -ignore_non_existing;
1987                         update_only = -update_only;
1988                         always_checksum = -always_checksum;
1989                         size_only = -size_only;
1990                         append_mode = -append_mode;
1991                         make_backups = -make_backups; /* avoid dup backup w/inplace */
1992                         ignore_times++;
1993
1994                         flist = cur_flist;
1995                         cur_flist = flist_for_ndx(ndx);
1996
1997                         file = cur_flist->files[ndx - cur_flist->ndx_start];
1998                         if (solo_file)
1999                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2000                         else
2001                                 f_name(file, fbuf);
2002                         recv_generator(fbuf, file, ndx, itemizing, code, sock_f_out);
2003                         cur_flist->to_redo--;
2004
2005                         cur_flist = flist;
2006
2007                         csum_length = SHORT_SUM_LENGTH;
2008                         max_size = -max_size;
2009                         min_size = -min_size;
2010                         ignore_existing = -ignore_existing;
2011                         ignore_non_existing = -ignore_non_existing;
2012                         update_only = -update_only;
2013                         always_checksum = -always_checksum;
2014                         size_only = -size_only;
2015                         append_mode = -append_mode;
2016                         make_backups = -make_backups;
2017                         ignore_times--;
2018                         continue;
2019                 }
2020
2021                 if (cur_flist == first_flist)
2022                         break;
2023
2024                 /* We only get here if inc_recurse is enabled. */
2025                 if (first_flist->in_progress || first_flist->to_redo)
2026                         break;
2027
2028                 if (!read_batch) {
2029                         write_ndx(sock_f_out, NDX_DONE);
2030                         maybe_flush_socket(1);
2031                 }
2032
2033                 if (delete_during == 2 || !dir_tweaking) {
2034                         /* Skip directory touch-up. */
2035                 } else if (first_flist->parent_ndx >= 0)
2036                         touch_up_dirs(dir_flist, first_flist->parent_ndx);
2037
2038                 flist_free(first_flist); /* updates first_flist */
2039         }
2040 }
2041
2042 void generate_files(int f_out, const char *local_name)
2043 {
2044         int i, ndx;
2045         char fbuf[MAXPATHLEN];
2046         int itemizing;
2047         enum logcode code;
2048         int save_do_progress = do_progress;
2049
2050         if (protocol_version >= 29) {
2051                 itemizing = 1;
2052                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2053                 code = logfile_format_has_i ? FNONE : FLOG;
2054         } else if (am_daemon) {
2055                 itemizing = logfile_format_has_i && do_xfers;
2056                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2057                 code = itemizing || !do_xfers ? FCLIENT : FINFO;
2058         } else if (!am_server) {
2059                 itemizing = stdout_format_has_i;
2060                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2061                 code = itemizing ? FNONE : FINFO;
2062         } else {
2063                 itemizing = 0;
2064                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2065                 code = FINFO;
2066         }
2067         solo_file = local_name;
2068         dir_tweaking = !(list_only || solo_file || dry_run);
2069         need_retouch_dir_times = preserve_times > 1;
2070         lull_mod = allowed_lull * 5;
2071
2072         if (verbose > 2)
2073                 rprintf(FINFO, "generator starting pid=%ld\n", (long)getpid());
2074
2075         if (delete_before && !solo_file && cur_flist->used > 0)
2076                 do_delete_pass();
2077         if (delete_during == 2) {
2078                 deldelay_size = BIGPATHBUFLEN * 4;
2079                 deldelay_buf = new_array(char, deldelay_size);
2080                 if (!deldelay_buf)
2081                         out_of_memory("delete-delay");
2082         }
2083         do_progress = 0;
2084
2085         if (append_mode > 0 || whole_file < 0)
2086                 whole_file = 0;
2087         if (verbose >= 2) {
2088                 rprintf(FINFO, "delta-transmission %s\n",
2089                         whole_file
2090                         ? "disabled for local transfer or --whole-file"
2091                         : "enabled");
2092         }
2093
2094         /* Since we often fill up the outgoing socket and then just sit around
2095          * waiting for the other 2 processes to do their thing, we don't want
2096          * to exit on a timeout.  If the data stops flowing, the receiver will
2097          * notice that and let us know via the redo pipe (or its closing). */
2098         ignore_timeout = 1;
2099
2100         dflt_perms = (ACCESSPERMS & ~orig_umask);
2101
2102         do {
2103 #ifdef SUPPORT_HARD_LINKS
2104                 if (preserve_hard_links && inc_recurse) {
2105                         while (!flist_eof && file_total < FILECNT_LOOKAHEAD/2)
2106                                 wait_for_receiver();
2107                 }
2108 #endif
2109
2110                 if (inc_recurse && cur_flist->parent_ndx >= 0) {
2111                         struct file_struct *fp = dir_flist->files[cur_flist->parent_ndx];
2112                         f_name(fp, fbuf);
2113                         ndx = cur_flist->ndx_start - 1;
2114                         recv_generator(fbuf, fp, ndx, itemizing, code, f_out);
2115                         if (delete_during && dry_run < 2 && !list_only) {
2116                                 if (BITS_SETnUNSET(fp->flags, FLAG_CONTENT_DIR, FLAG_MISSING_DIR)) {
2117                                         dev_t dirdev;
2118                                         if (one_file_system) {
2119                                                 uint32 *devp = F_DIR_DEV_P(fp);
2120                                                 dirdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
2121                                         } else
2122                                                 dirdev = MAKEDEV(0, 0);
2123                                         delete_in_dir(f_name(fp, fbuf), fp, &dirdev);
2124                                 }
2125                         }
2126                 }
2127                 for (i = cur_flist->low; i <= cur_flist->high; i++) {
2128                         struct file_struct *file = cur_flist->sorted[i];
2129
2130                         if (!F_IS_ACTIVE(file))
2131                                 continue;
2132
2133                         if (unsort_ndx)
2134                                 ndx = F_NDX(file);
2135                         else
2136                                 ndx = i + cur_flist->ndx_start;
2137
2138                         if (solo_file)
2139                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2140                         else
2141                                 f_name(file, fbuf);
2142                         recv_generator(fbuf, file, ndx, itemizing, code, f_out);
2143
2144                         check_for_finished_files(itemizing, code, 0);
2145
2146                         if (allowed_lull && !(i % lull_mod))
2147                                 maybe_send_keepalive();
2148                         else if (!(i & 0xFF))
2149                                 maybe_flush_socket(0);
2150                 }
2151
2152                 if (!inc_recurse) {
2153                         write_ndx(f_out, NDX_DONE);
2154                         break;
2155                 }
2156
2157                 while (1) {
2158                         check_for_finished_files(itemizing, code, 1);
2159                         if (cur_flist->next || flist_eof)
2160                                 break;
2161                         wait_for_receiver();
2162                 }
2163         } while ((cur_flist = cur_flist->next) != NULL);
2164
2165         if (delete_during)
2166                 delete_in_dir(NULL, NULL, &dev_zero);
2167         phase++;
2168         if (verbose > 2)
2169                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2170
2171         while (1) {
2172                 check_for_finished_files(itemizing, code, 1);
2173                 if (msgdone_cnt)
2174                         break;
2175                 wait_for_receiver();
2176         }
2177
2178         phase++;
2179         if (verbose > 2)
2180                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2181
2182         write_ndx(f_out, NDX_DONE);
2183         /* Reduce round-trip lag-time for a useless delay-updates phase. */
2184         if (protocol_version >= 29 && !delay_updates)
2185                 write_ndx(f_out, NDX_DONE);
2186
2187         /* Read MSG_DONE for the redo phase (and any prior messages). */
2188         while (1) {
2189                 check_for_finished_files(itemizing, code, 0);
2190                 if (msgdone_cnt > 1)
2191                         break;
2192                 wait_for_receiver();
2193         }
2194
2195         if (protocol_version >= 29) {
2196                 phase++;
2197                 if (verbose > 2)
2198                         rprintf(FINFO, "generate_files phase=%d\n", phase);
2199                 if (delay_updates)
2200                         write_ndx(f_out, NDX_DONE);
2201                 /* Read MSG_DONE for delay-updates phase & prior messages. */
2202                 while (msgdone_cnt == 2)
2203                         wait_for_receiver();
2204         }
2205
2206         do_progress = save_do_progress;
2207         if (delete_during == 2)
2208                 do_delayed_deletions(fbuf);
2209         if (delete_after && !solo_file && file_total > 0)
2210                 do_delete_pass();
2211
2212         if ((need_retouch_dir_perms || need_retouch_dir_times)
2213          && dir_tweaking && (!inc_recurse || delete_during == 2))
2214                 touch_up_dirs(dir_flist, -1);
2215
2216         if (max_delete >= 0 && deletion_count > max_delete) {
2217                 rprintf(FINFO,
2218                         "Deletions stopped due to --max-delete limit (%d skipped)\n",
2219                         deletion_count - max_delete);
2220                 io_error |= IOERR_DEL_LIMIT;
2221         }
2222
2223         if (verbose > 2)
2224                 rprintf(FINFO, "generate_files finished\n");
2225 }