generator.c

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