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