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) 2003-2022 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 write_devices;
  39 extern int preserve_acls;
  40 extern int preserve_xattrs;
  41 extern int preserve_links;
  42 extern int preserve_devices;
  43 extern int preserve_specials;
  44 extern int preserve_hard_links;
  45 extern int preserve_executability;
  46 extern int preserve_perms;
  47 extern int preserve_mtimes;
  48 extern int omit_dir_times;
  49 extern int omit_link_times;
  50 extern int delete_mode;
  51 extern int delete_before;
  52 extern int delete_during;
  53 extern int delete_after;
  54 extern int missing_args;
  55 extern int msgdone_cnt;
  56 extern int ignore_errors;
  57 extern int remove_source_files;
  58 extern int delay_updates;
  59 extern int update_only;
  60 extern int human_readable;
  61 extern int ignore_existing;
  62 extern int ignore_non_existing;
  63 extern int want_xattr_optim;
  64 extern int modify_window;
  65 extern int inplace;
  66 extern int append_mode;
  67 extern int make_backups;
  68 extern int csum_length;
  69 extern int ignore_times;
  70 extern int size_only;
  71 extern OFF_T max_size;
  72 extern OFF_T min_size;
  73 extern int io_error;
  74 extern int flist_eof;
  75 extern int allowed_lull;
  76 extern int sock_f_out;
  77 extern int protocol_version;
  78 extern int file_total;
  79 extern int fuzzy_basis;
  80 extern int always_checksum;
  81 extern int flist_csum_len;
  82 extern char *partial_dir;
  83 extern int alt_dest_type;
  84 extern int whole_file;
  85 extern int list_only;
  86 extern int read_batch;
  87 extern int write_batch;
  88 extern int safe_symlinks;
  89 extern int32 block_size;
  90 extern int unsort_ndx;
  91 extern int max_delete;
  92 extern int force_delete;
  93 extern int one_file_system;
  94 extern int skipped_deletes;
  95 extern dev_t filesystem_dev;
  96 extern mode_t orig_umask;
  97 extern uid_t our_uid;
  98 extern char *tmpdir;
  99 extern char *basis_dir[MAX_BASIS_DIRS+1];
 100 extern struct file_list *cur_flist, *first_flist, *dir_flist;
 101 extern filter_rule_list filter_list, daemon_filter_list;
 102
 103 int maybe_ATTRS_REPORT = 0;
 104 int maybe_ATTRS_ACCURATE_TIME = 0;
 105
 106 static dev_t dev_zero;
 107 static int deldelay_size = 0, deldelay_cnt = 0;
 108 static char *deldelay_buf = NULL;
 109 static int deldelay_fd = -1;
 110 static int loopchk_limit;
 111 static int dir_tweaking;
 112 static int symlink_timeset_failed_flags;
 113 static int need_retouch_dir_times;
 114 static int need_retouch_dir_perms;
 115 static const char *solo_file = NULL;
 116
 117 /* Forward declarations. */
 118 #ifdef SUPPORT_HARD_LINKS
 119 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
 120                                  enum logcode code, int f_out);
 121 #endif
 122
 123 #define EARLY_DELAY_DONE_MSG() (!delay_updates)
 124 #define EARLY_DELETE_DONE_MSG() (!(delete_during == 2 || delete_after))
 125
 126 static int start_delete_delay_temp(void)
 127 {
 128         char fnametmp[MAXPATHLEN];
 129         int save_dry_run = dry_run;
 130
 131         dry_run = 0;
 132         if (!get_tmpname(fnametmp, "deldelay", False)
 133          || (deldelay_fd = do_mkstemp(fnametmp, 0600)) < 0) {
 134                 rprintf(FINFO, "NOTE: Unable to create delete-delay temp file%s.\n",
 135                         inc_recurse ? "" : " -- switching to --delete-after");
 136                 delete_during = 0;
 137                 delete_after = !inc_recurse;
 138                 dry_run = save_dry_run;
 139                 return 0;
 140         }
 141         unlink(fnametmp);
 142         dry_run = save_dry_run;
 143         return 1;
 144 }
 145
 146 static int flush_delete_delay(void)
 147 {
 148         if (deldelay_fd < 0 && !start_delete_delay_temp())
 149                 return 0;
 150         if (write(deldelay_fd, deldelay_buf, deldelay_cnt) != deldelay_cnt) {
 151                 rsyserr(FERROR, errno, "flush of delete-delay buffer");
 152                 delete_during = 0;
 153                 delete_after = !inc_recurse;
 154                 close(deldelay_fd);
 155                 return 0;
 156         }
 157         deldelay_cnt = 0;
 158         return 1;
 159 }
 160
 161 static int remember_delete(struct file_struct *file, const char *fname, int flags)
 162 {
 163         int len;
 164
 165         if (deldelay_cnt == deldelay_size && !flush_delete_delay())
 166                 return 0;
 167
 168         if (flags & DEL_NO_UID_WRITE)
 169                 deldelay_buf[deldelay_cnt++] = '!';
 170
 171         while (1) {
 172                 len = snprintf(deldelay_buf + deldelay_cnt, deldelay_size - deldelay_cnt,
 173                                "%x %s%c", (int)file->mode, fname, '\0');
 174                 if ((deldelay_cnt += len) <= deldelay_size)
 175                         break;
 176                 deldelay_cnt -= len;
 177                 if (!flush_delete_delay())
 178                         return 0;
 179         }
 180
 181         return 1;
 182 }
 183
 184 static int read_delay_line(char *buf, int *flags_p)
 185 {
 186         static int read_pos = 0;
 187         unsigned int mode;
 188         int j, len;
 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, "ERROR: unexpected EOF in delete-delay file.\n");
 212                         }
 213                         return -1;
 214                 }
 215                 if (len < 0) {
 216                         rsyserr(FERROR, errno,
 217                                 "reading delete-delay file");
 218                         return -1;
 219                 }
 220                 deldelay_cnt += len;
 221                 read_pos = 0;
 222         }
 223
 224         bp = deldelay_buf + read_pos;
 225         if (*bp == '!') {
 226                 bp++;
 227                 *flags_p = DEL_NO_UID_WRITE;
 228         } else
 229                 *flags_p = 0;
 230
 231         if (sscanf(bp, "%x ", &mode) != 1) {
 232           invalid_data:
 233                 rprintf(FERROR, "ERROR: invalid data in delete-delay file.\n");
 234                 return -1;
 235         }
 236         past_space = strchr(bp, ' ') + 1;
 237         len = j - read_pos - (past_space - bp) + 1; /* count the '\0' */
 238         read_pos = j + 1;
 239
 240         if (len > MAXPATHLEN) {
 241                 rprintf(FERROR, "ERROR: filename too long in delete-delay file.\n");
 242                 return -1;
 243         }
 244
 245         /* The caller needs the name in a MAXPATHLEN buffer, so we copy it
 246          * instead of returning a pointer to our buffer. */
 247         memcpy(buf, past_space, len);
 248
 249         return mode;
 250 }
 251
 252 static void do_delayed_deletions(char *delbuf)
 253 {
 254         int mode, flags;
 255
 256         if (deldelay_fd >= 0) {
 257                 if (deldelay_cnt && !flush_delete_delay())
 258                         return;
 259                 lseek(deldelay_fd, 0, 0);
 260         }
 261         while ((mode = read_delay_line(delbuf, &flags)) >= 0)
 262                 delete_item(delbuf, mode, flags | DEL_RECURSE);
 263         if (deldelay_fd >= 0)
 264                 close(deldelay_fd);
 265 }
 266
 267 /* This function is used to implement per-directory deletion, and is used by
 268  * all the --delete-WHEN options.  Note that the fbuf pointer must point to a
 269  * MAXPATHLEN buffer with the name of the directory in it (the functions we
 270  * call will append names onto the end, but the old dir value will be restored
 271  * on exit). */
 272 static void delete_in_dir(char *fbuf, struct file_struct *file, dev_t fs_dev)
 273 {
 274         static int already_warned = 0;
 275         static struct hashtable *dev_tbl;
 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 & IOERR_GENERAL && !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 (!dev_tbl)
 305                         dev_tbl = hashtable_create(16, HT_KEY64);
 306                 if (file->flags & FLAG_TOP_DIR) {
 307                         hashtable_find(dev_tbl, fs_dev+1, "");
 308                         filesystem_dev = fs_dev;
 309                 } else if (filesystem_dev != fs_dev) {
 310                         if (!hashtable_find(dev_tbl, fs_dev+1, NULL))
 311                                 return;
 312                         filesystem_dev = fs_dev; /* it's a prior top-dir dev */
 313                 }
 314         }
 315
 316         dirlist = get_dirlist(fbuf, dlen, 0);
 317
 318         /* If an item in dirlist is not found in flist, delete it
 319          * from the filesystem. */
 320         for (i = dirlist->used; i--; ) {
 321                 struct file_struct *fp = dirlist->files[i];
 322                 if (!F_IS_ACTIVE(fp))
 323                         continue;
 324                 if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) {
 325                         if (INFO_GTE(MOUNT, 1))
 326                                 rprintf(FINFO, "cannot delete mount point: %s\n",
 327                                         f_name(fp, NULL));
 328                         continue;
 329                 }
 330                 /* Here we want to match regardless of file type.  Replacement
 331                  * of a file with one of another type is handled separately by
 332                  * a delete_item call with a DEL_MAKE_ROOM flag. */
 333                 if (flist_find_ignore_dirness(cur_flist, fp) < 0) {
 334                         int flags = DEL_RECURSE;
 335                         if (!(fp->mode & S_IWUSR) && !am_root && fp->flags & FLAG_OWNED_BY_US)
 336                                 flags |= DEL_NO_UID_WRITE;
 337                         f_name(fp, delbuf);
 338                         if (delete_during == 2) {
 339                                 if (!remember_delete(fp, delbuf, flags))
 340                                         break;
 341                         } else
 342                                 delete_item(delbuf, fp->mode, flags);
 343                 }
 344         }
 345
 346         flist_free(dirlist);
 347 }
 348
 349 /* This deletes any files on the receiving side that are not present on the
 350  * sending side.  This is used by --delete-before and --delete-after. */
 351 static void do_delete_pass(void)
 352 {
 353         char fbuf[MAXPATHLEN];
 354         STRUCT_STAT st;
 355         int j;
 356
 357         /* dry_run is incremented when the destination doesn't exist yet. */
 358         if (dry_run > 1 || list_only)
 359                 return;
 360
 361         for (j = 0; j < cur_flist->used; j++) {
 362                 struct file_struct *file = cur_flist->sorted[j];
 363
 364                 if (!F_IS_ACTIVE(file))
 365                         continue;
 366
 367                 f_name(file, fbuf);
 368
 369                 if (!(file->flags & FLAG_CONTENT_DIR)) {
 370                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(file));
 371                         continue;
 372                 }
 373
 374                 if (DEBUG_GTE(DEL, 1) && file->flags & FLAG_TOP_DIR)
 375                         rprintf(FINFO, "deleting in %s\n", fbuf);
 376
 377                 if (link_stat(fbuf, &st, keep_dirlinks) < 0
 378                  || !S_ISDIR(st.st_mode))
 379                         continue;
 380
 381                 delete_in_dir(fbuf, file, st.st_dev);
 382         }
 383         delete_in_dir(NULL, NULL, dev_zero);
 384
 385         if (INFO_GTE(FLIST, 2) && !am_server)
 386                 rprintf(FINFO, "                    \r");
 387 }
 388
 389 static inline int mtime_differs(STRUCT_STAT *stp, struct file_struct *file)
 390 {
 391 #ifdef ST_MTIME_NSEC
 392         return !same_time(stp->st_mtime, stp->ST_MTIME_NSEC, file->modtime, F_MOD_NSEC_or_0(file));
 393 #else
 394         return !same_time(stp->st_mtime, 0, file->modtime, 0);
 395 #endif
 396 }
 397
 398 static inline int any_time_differs(stat_x *sxp, struct file_struct *file, UNUSED(const char *fname))
 399 {
 400         int differs = mtime_differs(&sxp->st, file);
 401 #ifdef SUPPORT_CRTIMES
 402         if (!differs && crtimes_ndx) {
 403                 if (sxp->crtime == 0)
 404                         sxp->crtime = get_create_time(fname, &sxp->st);
 405                 differs = !same_time(sxp->crtime, 0, F_CRTIME(file), 0);
 406         }
 407 #endif
 408         return differs;
 409 }
 410
 411 static inline int perms_differ(struct file_struct *file, stat_x *sxp)
 412 {
 413         if (preserve_perms)
 414                 return !BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS);
 415
 416         if (preserve_executability)
 417                 return (sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0);
 418
 419         return 0;
 420 }
 421
 422 static inline int ownership_differs(struct file_struct *file, stat_x *sxp)
 423 {
 424         if (am_root && uid_ndx && sxp->st.st_uid != (uid_t)F_OWNER(file))
 425                 return 1;
 426
 427         if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP) && sxp->st.st_gid != (gid_t)F_GROUP(file))
 428                 return 1;
 429
 430         return 0;
 431 }
 432
 433 #ifdef SUPPORT_ACLS
 434 static inline int acls_differ(const char *fname, struct file_struct *file, stat_x *sxp)
 435 {
 436         if (preserve_acls) {
 437                 if (!ACL_READY(*sxp))
 438                         get_acl(fname, sxp);
 439                 if (set_acl(NULL, file, sxp, file->mode))
 440                         return 1;
 441         }
 442
 443         return 0;
 444 }
 445 #endif
 446
 447 #ifdef SUPPORT_XATTRS
 448 static inline int xattrs_differ(const char *fname, struct file_struct *file, stat_x *sxp)
 449 {
 450         if (preserve_xattrs) {
 451                 if (!XATTR_READY(*sxp))
 452                         get_xattr(fname, sxp);
 453                 if (xattr_diff(file, sxp, 0))
 454                         return 1;
 455         }
 456
 457         return 0;
 458 }
 459 #endif
 460
 461 int unchanged_attrs(const char *fname, struct file_struct *file, stat_x *sxp)
 462 {
 463         if (S_ISLNK(file->mode)) {
 464 #ifdef CAN_SET_SYMLINK_TIMES
 465                 if (preserve_mtimes && !omit_link_times && any_time_differs(sxp, file, fname))
 466                         return 0;
 467 #endif
 468 #ifdef CAN_CHMOD_SYMLINK
 469                 if (perms_differ(file, sxp))
 470                         return 0;
 471 #endif
 472 #ifdef CAN_CHOWN_SYMLINK
 473                 if (ownership_differs(file, sxp))
 474                         return 0;
 475 #endif
 476 #if defined SUPPORT_ACLS && 0 /* no current symlink-ACL support */
 477                 if (acls_differ(fname, file, sxp))
 478                         return 0;
 479 #endif
 480 #if defined SUPPORT_XATTRS && !defined NO_SYMLINK_XATTRS
 481                 if (xattrs_differ(fname, file, sxp))
 482                         return 0;
 483 #endif
 484         } else {
 485                 if (preserve_mtimes && any_time_differs(sxp, file, fname))
 486                         return 0;
 487                 if (perms_differ(file, sxp))
 488                         return 0;
 489                 if (ownership_differs(file, sxp))
 490                         return 0;
 491 #ifdef SUPPORT_ACLS
 492                 if (acls_differ(fname, file, sxp))
 493                         return 0;
 494 #endif
 495 #ifdef SUPPORT_XATTRS
 496                 if (xattrs_differ(fname, file, sxp))
 497                         return 0;
 498 #endif
 499         }
 500
 501         return 1;
 502 }
 503
 504 void itemize(const char *fnamecmp, struct file_struct *file, int ndx, int statret,
 505              stat_x *sxp, int32 iflags, uchar fnamecmp_type,
 506              const char *xname)
 507 {
 508         if (statret >= 0) { /* A from-dest-dir statret can == 1! */
 509                 int keep_time = !preserve_mtimes ? 0
 510                     : S_ISDIR(file->mode) ? !omit_dir_times
 511                     : S_ISLNK(file->mode) ? !omit_link_times
 512                     : 1;
 513
 514                 if (S_ISREG(file->mode) && F_LENGTH(file) != sxp->st.st_size)
 515                         iflags |= ITEM_REPORT_SIZE;
 516                 if (file->flags & FLAG_TIME_FAILED) { /* symlinks only */
 517                         if (iflags & ITEM_LOCAL_CHANGE)
 518                                 iflags |= symlink_timeset_failed_flags;
 519                 } else if (keep_time
 520                  ? mtime_differs(&sxp->st, file)
 521                  : iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !(iflags & ITEM_MATCHED)
 522                   && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
 523                         iflags |= ITEM_REPORT_TIME;
 524                 if (atimes_ndx && !S_ISDIR(file->mode) && !S_ISLNK(file->mode)
 525                  && !same_time(F_ATIME(file), 0, sxp->st.st_atime, 0))
 526                         iflags |= ITEM_REPORT_ATIME;
 527 #ifdef SUPPORT_CRTIMES
 528                 if (crtimes_ndx) {
 529                         if (sxp->crtime == 0)
 530                                 sxp->crtime = get_create_time(fnamecmp, &sxp->st);
 531                         if (!same_time(sxp->crtime, 0, F_CRTIME(file), 0))
 532                                 iflags |= ITEM_REPORT_CRTIME;
 533                 }
 534 #endif
 535 #ifndef CAN_CHMOD_SYMLINK
 536                 if (S_ISLNK(file->mode)) {
 537                         ;
 538                 } else
 539 #endif
 540                 if (preserve_perms) {
 541                         if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
 542                                 iflags |= ITEM_REPORT_PERMS;
 543                 } else if (preserve_executability
 544                  && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
 545                         iflags |= ITEM_REPORT_PERMS;
 546                 if (uid_ndx && am_root && (uid_t)F_OWNER(file) != sxp->st.st_uid)
 547                         iflags |= ITEM_REPORT_OWNER;
 548                 if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP) && sxp->st.st_gid != (gid_t)F_GROUP(file))
 549                         iflags |= ITEM_REPORT_GROUP;
 550 #ifdef SUPPORT_ACLS
 551                 if (preserve_acls && !S_ISLNK(file->mode)) {
 552                         if (!ACL_READY(*sxp))
 553                                 get_acl(fnamecmp, sxp);
 554                         if (set_acl(NULL, file, sxp, file->mode))
 555                                 iflags |= ITEM_REPORT_ACL;
 556                 }
 557 #endif
 558 #ifdef SUPPORT_XATTRS
 559                 if (preserve_xattrs) {
 560                         if (!XATTR_READY(*sxp))
 561                                 get_xattr(fnamecmp, sxp);
 562                         if (xattr_diff(file, sxp, 1))
 563                                 iflags |= ITEM_REPORT_XATTR;
 564                 }
 565 #endif
 566         } else {
 567 #ifdef SUPPORT_XATTRS
 568                 if (preserve_xattrs && xattr_diff(file, NULL, 1))
 569                         iflags |= ITEM_REPORT_XATTR;
 570 #endif
 571                 iflags |= ITEM_IS_NEW;
 572         }
 573
 574         iflags &= 0xffff;
 575         if ((iflags & (SIGNIFICANT_ITEM_FLAGS|ITEM_REPORT_XATTR) || INFO_GTE(NAME, 2)
 576           || stdout_format_has_i > 1 || (xname && *xname)) && !read_batch) {
 577                 if (protocol_version >= 29) {
 578                         if (ndx >= 0)
 579                                 write_ndx(sock_f_out, ndx);
 580                         write_shortint(sock_f_out, iflags);
 581                         if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
 582                                 write_byte(sock_f_out, fnamecmp_type);
 583                         if (iflags & ITEM_XNAME_FOLLOWS)
 584                                 write_vstring(sock_f_out, xname, strlen(xname));
 585 #ifdef SUPPORT_XATTRS
 586                         if (preserve_xattrs && do_xfers
 587                          && iflags & (ITEM_REPORT_XATTR|ITEM_TRANSFER)) {
 588                                 int fd = iflags & ITEM_REPORT_XATTR
 589                                       && !(want_xattr_optim && BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE))
 590                                        ? sock_f_out : -1;
 591                                 send_xattr_request(NULL, file, fd);
 592                         }
 593 #endif
 594                 } else if (ndx >= 0) {
 595                         enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
 596                         log_item(code, file, iflags, xname);
 597                 }
 598         }
 599 }
 600
 601 static enum filetype get_file_type(mode_t mode)
 602 {
 603         if (S_ISREG(mode))
 604                 return FT_REG;
 605         if (S_ISLNK(mode))
 606                 return FT_SYMLINK;
 607         if (S_ISDIR(mode))
 608                 return FT_DIR;
 609         if (IS_SPECIAL(mode))
 610                 return FT_SPECIAL;
 611         if (IS_DEVICE(mode))
 612                 return FT_DEVICE;
 613         return FT_UNSUPPORTED;
 614 }
 615
 616 /* Perform our quick-check heuristic for determining if a file is unchanged. */
 617 int quick_check_ok(enum filetype ftype, const char *fn, struct file_struct *file, STRUCT_STAT *st)
 618 {
 619         switch (ftype) {
 620           case FT_REG:
 621                 if (st->st_size != F_LENGTH(file))
 622                         return 0;
 623
 624                 /* If always_checksum is set then we use the checksum instead
 625                  * of the file mtime to determine whether to sync. */
 626                 if (always_checksum > 0) {
 627                         char sum[MAX_DIGEST_LEN];
 628                         file_checksum(fn, st, sum);
 629                         return memcmp(sum, F_SUM(file), flist_csum_len) == 0;
 630                 }
 631
 632                 if (size_only > 0)
 633                         return 1;
 634
 635                 if (ignore_times)
 636                         return 0;
 637
 638                 if (mtime_differs(st, file))
 639                         return 0;
 640                 break;
 641           case FT_DIR:
 642                 break;
 643           case FT_SYMLINK: {
 644 #ifdef SUPPORT_LINKS
 645                 char lnk[MAXPATHLEN];
 646                 int len = do_readlink(fn, lnk, MAXPATHLEN-1);
 647                 if (len <= 0)
 648                         return 0;
 649                 lnk[len] = '\0';
 650                 if (strcmp(lnk, F_SYMLINK(file)) != 0)
 651                         return 0;
 652                 break;
 653 #else
 654                 return -1;
 655 #endif
 656           }
 657           case FT_SPECIAL:
 658                 if (!BITS_EQUAL(file->mode, st->st_mode, _S_IFMT))
 659                         return 0;
 660                 break;
 661           case FT_DEVICE: {
 662                 uint32 *devp = F_RDEV_P(file);
 663                 if (st->st_rdev != MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)))
 664                         return 0;
 665                 break;
 666           }
 667           case FT_UNSUPPORTED:
 668                 return -1;
 669         }
 670         return 1;
 671 }
 672
 673 /*
 674  * set (initialize) the size entries in the per-file sum_struct
 675  * calculating dynamic block and checksum sizes.
 676  *
 677  * This is only called from generate_and_send_sums() but is a separate
 678  * function to encapsulate the logic.
 679  *
 680  * The block size is a rounded square root of file length.
 681  *
 682  * The checksum size is determined according to:
 683  *     blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
 684  * provided by Donovan Baarda which gives a probability of rsync
 685  * algorithm corrupting data and falling back using the whole md4
 686  * checksums.
 687  *
 688  * This might be made one of several selectable heuristics.
 689  */
 690 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
 691 {
 692         int32 blength;
 693         int s2length;
 694         int64 l;
 695
 696         if (len < 0) {
 697                 /* The file length overflowed our int64 var, so we can't process this file. */
 698                 sum->count = -1; /* indicate overflow error */
 699                 return;
 700         }
 701
 702         if (block_size)
 703                 blength = block_size;
 704         else if (len <= BLOCK_SIZE * BLOCK_SIZE)
 705                 blength = BLOCK_SIZE;
 706         else {
 707                 int32 max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE;
 708                 int32 c;
 709                 int cnt;
 710                 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
 711                 if (c < 0 || c >= max_blength)
 712                         blength = max_blength;
 713                 else {
 714                         blength = 0;
 715                         do {
 716                                 blength |= c;
 717                                 if (len < (int64)blength * blength)
 718                                         blength &= ~c;
 719                                 c >>= 1;
 720                         } while (c >= 8);       /* round to multiple of 8 */
 721                         blength = MAX(blength, BLOCK_SIZE);
 722                 }
 723         }
 724
 725         if (protocol_version < 27) {
 726                 s2length = csum_length;
 727         } else if (csum_length == SUM_LENGTH) {
 728                 s2length = SUM_LENGTH;
 729         } else {
 730                 int32 c;
 731                 int b = BLOCKSUM_BIAS;
 732                 for (l = len; l >>= 1; b += 2) {}
 733                 for (c = blength; (c >>= 1) && b; b--) {}
 734                 /* add a bit, subtract rollsum, round up. */
 735                 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
 736                 s2length = MAX(s2length, csum_length);
 737                 s2length = MIN(s2length, SUM_LENGTH);
 738         }
 739
 740         sum->flength    = len;
 741         sum->blength    = blength;
 742         sum->s2length   = s2length;
 743         sum->remainder  = (int32)(len % blength);
 744         sum->count      = (int32)(l = (len / blength) + (sum->remainder != 0));
 745
 746         if ((int64)sum->count != l)
 747                 sum->count = -1;
 748
 749         if (sum->count && DEBUG_GTE(DELTASUM, 2)) {
 750                 rprintf(FINFO,
 751                         "count=%s rem=%ld blength=%ld s2length=%d flength=%s\n",
 752                         big_num(sum->count), (long)sum->remainder, (long)sum->blength,
 753                         sum->s2length, big_num(sum->flength));
 754         }
 755 }
 756
 757
 758 /*
 759  * Generate and send a stream of signatures/checksums that describe a buffer
 760  *
 761  * Generate approximately one checksum every block_len bytes.
 762  */
 763 static int generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
 764 {
 765         int32 i;
 766         struct map_struct *mapbuf;
 767         struct sum_struct sum;
 768         OFF_T offset = 0;
 769
 770         sum_sizes_sqroot(&sum, len);
 771         if (sum.count < 0)
 772                 return -1;
 773         write_sum_head(f_out, &sum);
 774
 775         if (append_mode > 0 && f_copy < 0)
 776                 return 0;
 777
 778         if (len > 0)
 779                 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
 780         else
 781                 mapbuf = NULL;
 782
 783         for (i = 0; i < sum.count; i++) {
 784                 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
 785                 char *map = map_ptr(mapbuf, offset, n1);
 786                 char sum2[SUM_LENGTH];
 787                 uint32 sum1;
 788
 789                 len -= n1;
 790                 offset += n1;
 791
 792                 if (f_copy >= 0) {
 793                         full_write(f_copy, map, n1);
 794                         if (append_mode > 0)
 795                                 continue;
 796                 }
 797
 798                 sum1 = get_checksum1(map, n1);
 799                 get_checksum2(map, n1, sum2);
 800
 801                 if (DEBUG_GTE(DELTASUM, 3)) {
 802                         rprintf(FINFO,
 803                                 "chunk[%s] offset=%s len=%ld sum1=%08lx\n",
 804                                 big_num(i), big_num(offset - n1), (long)n1,
 805                                 (unsigned long)sum1);
 806                 }
 807                 write_int(f_out, sum1);
 808                 write_buf(f_out, sum2, sum.s2length);
 809         }
 810
 811         if (mapbuf)
 812                 unmap_file(mapbuf);
 813
 814         return 0;
 815 }
 816
 817
 818 /* Try to find a filename in the same dir as "fname" with a similar name. */
 819 static struct file_struct *find_fuzzy(struct file_struct *file, struct file_list *dirlist_array[], uchar *fnamecmp_type_ptr)
 820 {
 821         int fname_len, fname_suf_len;
 822         const char *fname_suf, *fname = file->basename;
 823         uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
 824         int i, j;
 825         struct file_struct *lowest_fp = NULL;
 826
 827         fname_len = strlen(fname);
 828         fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
 829
 830         /* Try to find an exact size+mtime match first. */
 831         for (i = 0; i < fuzzy_basis; i++) {
 832                 struct file_list *dirlist = dirlist_array[i];
 833
 834                 if (!dirlist)
 835                         continue;
 836
 837                 for (j = 0; j < dirlist->used; j++) {
 838                         struct file_struct *fp = dirlist->files[j];
 839
 840                         if (!F_IS_ACTIVE(fp))
 841                                 continue;
 842
 843                         if (!S_ISREG(fp->mode) || !F_LENGTH(fp) || fp->flags & FLAG_FILE_SENT)
 844                                 continue;
 845
 846                         if (F_LENGTH(fp) == F_LENGTH(file) && same_time(fp->modtime, 0, file->modtime, 0)) {
 847                                 if (DEBUG_GTE(FUZZY, 2))
 848                                         rprintf(FINFO, "fuzzy size/modtime match for %s\n", f_name(fp, NULL));
 849                                 *fnamecmp_type_ptr = FNAMECMP_FUZZY + i;
 850                                 return fp;
 851                         }
 852
 853                 }
 854         }
 855
 856         for (i = 0; i < fuzzy_basis; i++) {
 857                 struct file_list *dirlist = dirlist_array[i];
 858
 859                 if (!dirlist)
 860                         continue;
 861
 862                 for (j = 0; j < dirlist->used; j++) {
 863                         struct file_struct *fp = dirlist->files[j];
 864                         const char *suf, *name;
 865                         int len, suf_len;
 866                         uint32 dist;
 867
 868                         if (!F_IS_ACTIVE(fp))
 869                                 continue;
 870
 871                         if (!S_ISREG(fp->mode) || !F_LENGTH(fp) || fp->flags & FLAG_FILE_SENT)
 872                                 continue;
 873
 874                         name = fp->basename;
 875                         len = strlen(name);
 876                         suf = find_filename_suffix(name, len, &suf_len);
 877
 878                         dist = fuzzy_distance(name, len, fname, fname_len);
 879                         /* Add some extra weight to how well the suffixes match. */
 880                         dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len) * 10;
 881                         if (DEBUG_GTE(FUZZY, 2)) {
 882                                 rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
 883                                         f_name(fp, NULL), (int)(dist>>16), (int)(dist&0xFFFF));
 884                         }
 885                         if (dist <= lowest_dist) {
 886                                 lowest_dist = dist;
 887                                 lowest_fp = fp;
 888                                 *fnamecmp_type_ptr = FNAMECMP_FUZZY + i;
 889                         }
 890                 }
 891         }
 892
 893         return lowest_fp;
 894 }
 895
 896 /* Copy a file found in our --copy-dest handling. */
 897 static int copy_altdest_file(const char *src, const char *dest, struct file_struct *file)
 898 {
 899         char buf[MAXPATHLEN];
 900         const char *copy_to, *partialptr;
 901         int save_preserve_xattrs = preserve_xattrs;
 902         int ok, fd_w;
 903
 904         if (inplace) {
 905                 /* Let copy_file open the destination in place. */
 906                 fd_w = -1;
 907                 copy_to = dest;
 908         } else {
 909                 fd_w = open_tmpfile(buf, dest, file);
 910                 if (fd_w < 0)
 911                         return -1;
 912                 copy_to = buf;
 913         }
 914         cleanup_set(copy_to, NULL, NULL, -1, -1);
 915         if (copy_file(src, copy_to, fd_w, file->mode) < 0) {
 916                 if (INFO_GTE(COPY, 1)) {
 917                         rsyserr(FINFO, errno, "copy_file %s => %s",
 918                                 full_fname(src), copy_to);
 919                 }
 920                 /* Try to clean up. */
 921                 unlink(copy_to);
 922                 cleanup_disable();
 923                 return -1;
 924         }
 925         partialptr = partial_dir ? partial_dir_fname(dest) : NULL;
 926         preserve_xattrs = 0; /* xattrs were copied with file */
 927         ok = finish_transfer(dest, copy_to, src, partialptr, file, 1, 0);
 928         preserve_xattrs = save_preserve_xattrs;
 929         cleanup_disable();
 930         return ok ? 0 : -1;
 931 }
 932
 933 /* This is only called for regular files.  We return -2 if we've finished
 934  * handling the file, -1 if no dest-linking occurred, or a non-negative
 935  * value if we found an alternate basis file.  If we're called with the
 936  * find_exact_for_existing flag, the destination file already exists, so
 937  * we only try to find an exact alt-dest match.  In this case, the returns
 938  * are only -2 & -1 (both as above). */
 939 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
 940                          char *cmpbuf, stat_x *sxp, int find_exact_for_existing,
 941                          int itemizing, enum logcode code)
 942 {
 943         STRUCT_STAT real_st = sxp->st;
 944         int best_match = -1;
 945         int match_level = 0;
 946         int j = 0;
 947
 948         do {
 949                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 950                 if (link_stat(cmpbuf, &sxp->st, 0) < 0 || !S_ISREG(sxp->st.st_mode))
 951                         continue;
 952                 if (match_level == 0) {
 953                         best_match = j;
 954                         match_level = 1;
 955                 }
 956                 if (!quick_check_ok(FT_REG, cmpbuf, file, &sxp->st))
 957                         continue;
 958                 if (match_level == 1) {
 959                         best_match = j;
 960                         match_level = 2;
 961                 }
 962                 if (unchanged_attrs(cmpbuf, file, sxp)) {
 963                         best_match = j;
 964                         match_level = 3;
 965                         break;
 966                 }
 967                 free_stat_x(sxp);
 968         } while (basis_dir[++j] != NULL);
 969
 970         if (!match_level)
 971                 goto got_nothing_for_ya;
 972
 973         if (j != best_match) {
 974                 j = best_match;
 975                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 976                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
 977                         goto got_nothing_for_ya;
 978         }
 979
 980         if (match_level == 3 && alt_dest_type != COPY_DEST) {
 981                 if (find_exact_for_existing) {
 982                         if (alt_dest_type == LINK_DEST && real_st.st_dev == sxp->st.st_dev && real_st.st_ino == sxp->st.st_ino)
 983                                 return -1;
 984                         if (do_unlink(fname) < 0 && errno != ENOENT)
 985                                 goto got_nothing_for_ya;
 986                 }
 987 #ifdef SUPPORT_HARD_LINKS
 988                 if (alt_dest_type == LINK_DEST) {
 989                         if (!hard_link_one(file, fname, cmpbuf, 1))
 990                                 goto try_a_copy;
 991                         if (atimes_ndx)
 992                                 set_file_attrs(fname, file, sxp, NULL, 0);
 993                         if (preserve_hard_links && F_IS_HLINKED(file))
 994                                 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, j);
 995                         if (!maybe_ATTRS_REPORT && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
 996                                 itemize(cmpbuf, file, ndx, 1, sxp,
 997                                         ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS,
 998                                         0, "");
 999                         }
1000                 } else
1001 #endif
1002                 {
1003                         if (itemizing)
1004                                 itemize(cmpbuf, file, ndx, 0, sxp, 0, 0, NULL);
1005                 }
1006                 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT)
1007                         rprintf(FCLIENT, "%s is uptodate\n", fname);
1008                 return -2;
1009         }
1010
1011         if (find_exact_for_existing)
1012                 goto got_nothing_for_ya;
1013
1014         if (match_level >= 2) {
1015 #ifdef SUPPORT_HARD_LINKS
1016           try_a_copy: /* Copy the file locally. */
1017 #endif
1018                 if (!dry_run && copy_altdest_file(cmpbuf, fname, file) < 0) {
1019                         if (find_exact_for_existing) /* Can get here via hard-link failure */
1020                                 goto got_nothing_for_ya;
1021                         return -1;
1022                 }
1023                 if (itemizing)
1024                         itemize(cmpbuf, file, ndx, 0, sxp, ITEM_LOCAL_CHANGE, 0, NULL);
1025                 if (maybe_ATTRS_REPORT
1026                  && ((!itemizing && INFO_GTE(NAME, 1) && match_level == 2)
1027                   || (INFO_GTE(NAME, 2) && match_level == 3))) {
1028                         code = match_level == 3 ? FCLIENT : FINFO;
1029                         rprintf(code, "%s%s\n", fname,
1030                                 match_level == 3 ? " is uptodate" : "");
1031                 }
1032 #ifdef SUPPORT_HARD_LINKS
1033                 if (preserve_hard_links && F_IS_HLINKED(file))
1034                         finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, -1);
1035 #endif
1036                 return -2;
1037         }
1038
1039         return FNAMECMP_BASIS_DIR_LOW + j;
1040
1041 got_nothing_for_ya:
1042         sxp->st = real_st;
1043         return -1;
1044 }
1045
1046 /* This is only called for non-regular files.  We return -2 if we've finished
1047  * handling the file, or -1 if no dest-linking occurred, or a non-negative
1048  * value if we found an alternate basis file. */
1049 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
1050                          char *cmpbuf, stat_x *sxp, int itemizing,
1051                          enum logcode code)
1052 {
1053         int best_match = -1;
1054         int match_level = 0;
1055         enum filetype ftype = get_file_type(file->mode);
1056         int j = 0;
1057
1058 #ifndef SUPPORT_LINKS
1059         if (ftype == FT_SYMLINK)
1060                 return -1;
1061 #endif
1062         if (ftype == FT_REG || ftype == FT_UNSUPPORTED) {
1063                 rprintf(FERROR,
1064                         "internal: try_dests_non() called with invalid mode (%o)\n",
1065                         (int)file->mode);
1066                 exit_cleanup(RERR_UNSUPPORTED);
1067         }
1068
1069         do {
1070                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1071                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1072                         continue;
1073                 if (ftype != get_file_type(sxp->st.st_mode))
1074                         continue;
1075                 if (match_level < 1) {
1076                         match_level = 1;
1077                         best_match = j;
1078                 }
1079                 if (!quick_check_ok(ftype, cmpbuf, file, &sxp->st))
1080                         continue;
1081                 if (match_level < 2) {
1082                         match_level = 2;
1083                         best_match = j;
1084                 }
1085                 if (unchanged_attrs(cmpbuf, file, sxp)) {
1086                         match_level = 3;
1087                         best_match = j;
1088                         break;
1089                 }
1090         } while (basis_dir[++j] != NULL);
1091
1092         if (!match_level)
1093                 return -1;
1094
1095         if (j != best_match) {
1096                 j = best_match;
1097                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1098                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1099                         return -1;
1100         }
1101
1102         if (match_level == 3) {
1103 #ifdef SUPPORT_HARD_LINKS
1104                 if (alt_dest_type == LINK_DEST
1105 #ifndef CAN_HARDLINK_SYMLINK
1106                  && !S_ISLNK(file->mode)
1107 #endif
1108 #ifndef CAN_HARDLINK_SPECIAL
1109                  && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
1110 #endif
1111                  && !S_ISDIR(file->mode)) {
1112                         if (do_link(cmpbuf, fname) < 0) {
1113                                 rsyserr(FERROR_XFER, errno,
1114                                         "failed to hard-link %s with %s",
1115                                         cmpbuf, fname);
1116                                 return j;
1117                         }
1118                         if (preserve_hard_links && F_IS_HLINKED(file))
1119                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1120                 } else
1121 #endif
1122                         match_level = 2;
1123                 if (itemizing && stdout_format_has_i
1124                  && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
1125                         int chg = alt_dest_type == COMPARE_DEST && ftype != FT_DIR ? 0
1126                             : ITEM_LOCAL_CHANGE + (match_level == 3 ? ITEM_XNAME_FOLLOWS : 0);
1127                         char *lp = match_level == 3 ? "" : NULL;
1128                         itemize(cmpbuf, file, ndx, 0, sxp, chg + ITEM_MATCHED, 0, lp);
1129                 }
1130                 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT) {
1131                         rprintf(FCLIENT, "%s%s is uptodate\n",
1132                                 fname, ftype == FT_DIR ? "/" : "");
1133                 }
1134                 return -2;
1135         }
1136
1137         return j;
1138 }
1139
1140 static void list_file_entry(struct file_struct *f)
1141 {
1142         char permbuf[PERMSTRING_SIZE];
1143         const char *mtime_str = timestring(f->modtime);
1144         int size_width = human_readable ? 14 : 11;
1145         int mtime_width = 1 + strlen(mtime_str);
1146         int atime_width = atimes_ndx ? mtime_width : 0;
1147         int crtime_width = crtimes_ndx ? mtime_width : 0;
1148
1149         if (!F_IS_ACTIVE(f)) {
1150                 /* this can happen if duplicate names were removed */
1151                 return;
1152         }
1153
1154         /* TODO: indicate '+' if the entry has an ACL. */
1155
1156         if (missing_args == 2 && f->mode == 0) {
1157                 rprintf(FINFO, "%-*s %s\n",
1158                         10 + 1 + size_width + mtime_width + atime_width + crtime_width, "*missing",
1159                         f_name(f, NULL));
1160         } else {
1161                 const char *atime_str = atimes_ndx && !S_ISDIR(f->mode) ? timestring(F_ATIME(f)) : "";
1162                 const char *crtime_str = crtimes_ndx ? timestring(F_CRTIME(f)) : "";
1163                 const char *arrow, *lnk;
1164
1165                 permstring(permbuf, f->mode);
1166
1167 #ifdef SUPPORT_LINKS
1168                 if (preserve_links && S_ISLNK(f->mode)) {
1169                         arrow = " -> ";
1170                         lnk = F_SYMLINK(f);
1171                 } else
1172 #endif
1173                         arrow = lnk = "";
1174
1175                 rprintf(FINFO, "%s %*s %s%*s%*s %s%s%s\n",
1176                         permbuf, size_width, human_num(F_LENGTH(f)),
1177                         timestring(f->modtime), atime_width, atime_str, crtime_width, crtime_str,
1178                         f_name(f, NULL), arrow, lnk);
1179         }
1180 }
1181
1182 static int phase = 0;
1183 static int dflt_perms;
1184
1185 static int implied_dirs_are_missing;
1186 /* Helper for recv_generator's skip_dir and dry_missing_dir tests. */
1187 static BOOL is_below(struct file_struct *file, struct file_struct *subtree)
1188 {
1189         return F_DEPTH(file) > F_DEPTH(subtree)
1190                 && (!implied_dirs_are_missing || f_name_has_prefix(file, subtree));
1191 }
1192
1193 /* Acts on the indicated item in cur_flist whose name is fname.  If a dir,
1194  * make sure it exists, and has the right permissions/timestamp info.  For
1195  * all other non-regular files (symlinks, etc.) we create them here.  For
1196  * regular files that have changed, we try to find a basis file and then
1197  * start sending checksums.  The ndx is the file's unique index value.
1198  *
1199  * The fname parameter must point to a MAXPATHLEN buffer!  (e.g it gets
1200  * passed to delete_item(), which can use it during a recursive delete.)
1201  *
1202  * Note that f_out is set to -1 when doing final directory-permission and
1203  * modification-time repair. */
1204 static void recv_generator(char *fname, struct file_struct *file, int ndx,
1205                            int itemizing, enum logcode code, int f_out)
1206 {
1207         static const char *parent_dirname = "";
1208         static struct file_struct *prior_dir_file = NULL;
1209         /* Missing dir not created due to --dry-run; will still be scanned. */
1210         static struct file_struct *dry_missing_dir = NULL;
1211         /* Missing dir whose contents are skipped altogether due to
1212          * --ignore-non-existing, daemon exclude, or mkdir failure. */
1213         static struct file_struct *skip_dir = NULL;
1214         static struct file_list *fuzzy_dirlist[MAX_BASIS_DIRS+1];
1215         static int need_fuzzy_dirlist = 0;
1216         struct file_struct *fuzzy_file = NULL;
1217         int fd = -1, f_copy = -1;
1218         stat_x sx, real_sx;
1219         STRUCT_STAT partial_st;
1220         struct file_struct *back_file = NULL;
1221         int statret, real_ret, stat_errno;
1222         char *fnamecmp, *partialptr, *backupptr = NULL;
1223         char fnamecmpbuf[MAXPATHLEN];
1224         uchar fnamecmp_type;
1225         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1226         enum filetype stype, ftype = get_file_type(file->mode);
1227         int is_dir = ftype != FT_DIR ? 0
1228                    : inc_recurse && ndx != cur_flist->ndx_start - 1 ? -1
1229                    : 1;
1230
1231         if (DEBUG_GTE(GENR, 1))
1232                 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
1233
1234         if (list_only) {
1235                 if (is_dir < 0
1236                  || (is_dir && !implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1237                         return;
1238                 list_file_entry(file);
1239                 return;
1240         }
1241
1242         maybe_ATTRS_ACCURATE_TIME = always_checksum ? ATTRS_ACCURATE_TIME : 0;
1243
1244         if (skip_dir) {
1245                 if (is_below(file, skip_dir)) {
1246                         if (is_dir)
1247                                 file->flags |= FLAG_MISSING_DIR;
1248 #ifdef SUPPORT_HARD_LINKS
1249                         else if (F_IS_HLINKED(file))
1250                                 handle_skipped_hlink(file, itemizing, code, f_out);
1251 #endif
1252                         return;
1253                 }
1254                 skip_dir = NULL;
1255         }
1256
1257         init_stat_x(&sx);
1258         if (daemon_filter_list.head && (*fname != '.' || fname[1])) {
1259                 if (check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
1260                         if (is_dir < 0)
1261                                 return;
1262 #ifdef SUPPORT_HARD_LINKS
1263                         if (F_IS_HLINKED(file))
1264                                 handle_skipped_hlink(file, itemizing, code, f_out);
1265 #endif
1266                         rprintf(FERROR_XFER,
1267                                 "ERROR: daemon refused to receive %s \"%s\"\n",
1268                                 is_dir ? "directory" : "file", fname);
1269                         if (is_dir)
1270                                 goto skipping_dir_contents;
1271                         return;
1272                 }
1273         }
1274
1275         if (dry_run > 1 || (dry_missing_dir && is_below(file, dry_missing_dir))) {
1276                 int i;
1277           parent_is_dry_missing:
1278                 for (i = 0; i < fuzzy_basis; i++) {
1279                         if (fuzzy_dirlist[i]) {
1280                                 flist_free(fuzzy_dirlist[i]);
1281                                 fuzzy_dirlist[i] = NULL;
1282                         }
1283                 }
1284                 parent_dirname = "";
1285                 statret = -1;
1286                 stat_errno = ENOENT;
1287         } else {
1288                 const char *dn = file->dirname ? file->dirname : ".";
1289                 dry_missing_dir = NULL;
1290                 if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
1291                         /* Each parent dir must be in the file list or the flist data is bad.
1292                          * Optimization: most of the time the parent dir will be the last dir
1293                          * this function was asked to process in the file list. */
1294                         if (!inc_recurse
1295                          && (*dn != '.' || dn[1]) /* Avoid an issue with --relative and the "." dir. */
1296                          && (!prior_dir_file || strcmp(dn, f_name(prior_dir_file, NULL)) != 0)) {
1297                                 int ok = 0, j = flist_find_name(cur_flist, dn, -1);
1298                                 if (j >= 0) {
1299                                         struct file_struct *f = cur_flist->sorted[j];
1300                                         if (S_ISDIR(f->mode) || (missing_args == 2 && !file->mode && !f->mode))
1301                                                 ok = 1;
1302                                 }
1303                                 /* The --delete-missing-args option can actually put invalid entries into
1304                                  * the file list, so if that option was specified, we'll just complain about
1305                                  * it and allow it. */
1306                                 if (!ok && missing_args == 2 && file->mode == 0 && j < 0)
1307                                         rprintf(FERROR, "WARNING: parent dir is absent in the file list: %s\n", dn);
1308                                 else if (!ok) {
1309                                         rprintf(FERROR, "ABORTING due to invalid path from sender: %s/%s\n",
1310                                                 dn, file->basename);
1311                                         exit_cleanup(RERR_PROTOCOL);
1312                                 }
1313                         }
1314                         if (relative_paths && !implied_dirs && file->mode != 0
1315                          && do_stat(dn, &sx.st) < 0) {
1316                                 if (dry_run)
1317                                         goto parent_is_dry_missing;
1318                                 if (make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0) {
1319                                         rsyserr(FERROR_XFER, errno,
1320                                                 "recv_generator: mkdir %s failed",
1321                                                 full_fname(dn));
1322                                 }
1323                         }
1324                         if (fuzzy_basis) {
1325                                 int i;
1326                                 for (i = 0; i < fuzzy_basis; i++) {
1327                                         if (fuzzy_dirlist[i]) {
1328                                                 flist_free(fuzzy_dirlist[i]);
1329                                                 fuzzy_dirlist[i] = NULL;
1330                                         }
1331                                 }
1332                                 need_fuzzy_dirlist = 1;
1333                         }
1334 #ifdef SUPPORT_ACLS
1335                         if (!preserve_perms)
1336                                 dflt_perms = default_perms_for_dir(dn);
1337 #endif
1338                 }
1339                 parent_dirname = dn;
1340
1341                 statret = link_stat(fname, &sx.st, keep_dirlinks && is_dir);
1342                 stat_errno = errno;
1343         }
1344
1345         if (missing_args == 2 && file->mode == 0) {
1346                 if (filter_list.head && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
1347                         return;
1348                 if (statret == 0)
1349                         delete_item(fname, sx.st.st_mode, del_opts);
1350                 return;
1351         }
1352
1353         if (ignore_non_existing > 0 && statret == -1 && stat_errno == ENOENT) {
1354                 if (is_dir) {
1355                         if (is_dir < 0)
1356                                 return;
1357                         skip_dir = file;
1358                         file->flags |= FLAG_MISSING_DIR;
1359                 }
1360 #ifdef SUPPORT_HARD_LINKS
1361                 else if (F_IS_HLINKED(file))
1362                         handle_skipped_hlink(file, itemizing, code, f_out);
1363 #endif
1364                 if (INFO_GTE(SKIP, 1)) {
1365                         rprintf(FINFO, "not creating new %s \"%s\"\n",
1366                                 is_dir ? "directory" : "file", fname);
1367                 }
1368                 return;
1369         }
1370
1371         if (statret == 0 && !(sx.st.st_mode & S_IWUSR)
1372          && !am_root && sx.st.st_uid == our_uid)
1373                 del_opts |= DEL_NO_UID_WRITE;
1374
1375         if (statret == 0)
1376                 stype = get_file_type(sx.st.st_mode);
1377         else
1378                 stype = FT_UNSUPPORTED;
1379
1380         if (ignore_existing > 0 && statret == 0
1381          && (!is_dir || stype != FT_DIR)) {
1382                 if (INFO_GTE(SKIP, 1) && is_dir >= 0) {
1383                         const char *suf = "";
1384                         if (INFO_GTE(SKIP, 2)) {
1385                                 if (ftype != stype)
1386                                         suf = " (type change)";
1387                                 else if (!quick_check_ok(ftype, fname, file, &sx.st))
1388                                         suf = always_checksum ? " (sum change)" : " (file change)";
1389                                 else if (!unchanged_attrs(fname, file, &sx))
1390                                         suf = " (attr change)";
1391                                 else
1392                                         suf = " (uptodate)";
1393                         }
1394                         rprintf(FINFO, "%s exists%s\n", fname, suf);
1395                 }
1396 #ifdef SUPPORT_HARD_LINKS
1397                 if (F_IS_HLINKED(file))
1398                         handle_skipped_hlink(file, itemizing, code, f_out);
1399 #endif
1400                 goto cleanup;
1401         }
1402
1403         fnamecmp = fname;
1404
1405         if (is_dir) {
1406                 mode_t added_perms;
1407                 if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
1408                         goto cleanup;
1409                 if (am_root < 0) {
1410                         /* For --fake-super, the dir must be useable by the copying
1411                          * user, just like it would be for root. */
1412                         added_perms = S_IRUSR|S_IWUSR|S_IXUSR;
1413                 } else
1414                         added_perms = 0;
1415                 if (is_dir < 0) {
1416                         if (!preserve_mtimes || omit_dir_times)
1417                                 goto cleanup;
1418                         /* In inc_recurse mode we want to make sure any missing
1419                          * directories get created while we're still processing
1420                          * the parent dir (which allows us to touch the parent
1421                          * dir's mtime right away).  We will handle the dir in
1422                          * full later (right before we handle its contents). */
1423                         if (statret == 0
1424                          && (stype == FT_DIR
1425                           || delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0))
1426                                 goto cleanup; /* Any errors get reported later. */
1427                         if (do_mkdir(fname, (file->mode|added_perms) & 0700) == 0)
1428                                 file->flags |= FLAG_DIR_CREATED;
1429                         goto cleanup;
1430                 }
1431                 /* The file to be received is a directory, so we need
1432                  * to prepare appropriately.  If there is already a
1433                  * file of that name and it is *not* a directory, then
1434                  * we need to delete it.  If it doesn't exist, then
1435                  * (perhaps recursively) create it. */
1436                 if (statret == 0 && stype != FT_DIR) {
1437                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0)
1438                                 goto skipping_dir_contents;
1439                         statret = -1;
1440                 }
1441                 if (dry_run && statret != 0) {
1442                         if (!dry_missing_dir)
1443                                 dry_missing_dir = file;
1444                         file->flags |= FLAG_MISSING_DIR;
1445                 }
1446                 init_stat_x(&real_sx);
1447                 real_sx.st = sx.st;
1448                 real_ret = statret;
1449                 if (file->flags & FLAG_DIR_CREATED)
1450                         statret = -1;
1451                 if (!preserve_perms) { /* See comment in non-dir code below. */
1452                         file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms, statret == 0);
1453                 }
1454                 if (statret != 0 && basis_dir[0] != NULL) {
1455                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx, itemizing, code);
1456                         if (j == -2) {
1457                                 itemizing = 0;
1458                                 code = FNONE;
1459                                 statret = 1;
1460                         } else if (j >= 0) {
1461                                 statret = 1;
1462                                 fnamecmp = fnamecmpbuf;
1463                         }
1464                 }
1465                 if (itemizing && f_out != -1) {
1466                         itemize(fnamecmp, file, ndx, statret, &sx,
1467                                 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
1468                 }
1469                 if (real_ret != 0 && do_mkdir(fname,file->mode|added_perms) < 0 && errno != EEXIST) {
1470                         if (!relative_paths || errno != ENOENT
1471                          || make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0
1472                          || (do_mkdir(fname, file->mode|added_perms) < 0 && errno != EEXIST)) {
1473                                 rsyserr(FERROR_XFER, errno,
1474                                         "recv_generator: mkdir %s failed",
1475                                         full_fname(fname));
1476                           skipping_dir_contents:
1477                                 rprintf(FERROR, "*** Skipping any contents from this failed directory ***\n");
1478                                 skip_dir = file;
1479                                 file->flags |= FLAG_MISSING_DIR;
1480                                 goto cleanup;
1481                         }
1482                 }
1483
1484 #ifdef SUPPORT_XATTRS
1485                 if (preserve_xattrs && statret == 1)
1486                         copy_xattrs(fnamecmpbuf, fname);
1487 #endif
1488                 if (set_file_attrs(fname, file, real_ret ? NULL : &real_sx, NULL, 0)
1489                  && INFO_GTE(NAME, 1) && code != FNONE && f_out != -1)
1490                         rprintf(code, "%s/\n", fname);
1491
1492                 /* We need to ensure that the dirs in the transfer have both
1493                  * readable and writable permissions during the time we are
1494                  * putting files within them.  This is then restored to the
1495                  * former permissions after the transfer is done. */
1496 #ifdef HAVE_CHMOD
1497                 if (!am_root && (file->mode & S_IRWXU) != S_IRWXU && dir_tweaking) {
1498                         mode_t mode = file->mode | S_IRWXU;
1499                         if (do_chmod(fname, mode) < 0) {
1500                                 rsyserr(FERROR_XFER, errno,
1501                                         "failed to modify permissions on %s",
1502                                         full_fname(fname));
1503                         }
1504                         need_retouch_dir_perms = 1;
1505                 }
1506 #endif
1507
1508                 if (real_ret != 0 && one_file_system)
1509                         real_sx.st.st_dev = filesystem_dev;
1510                 if (inc_recurse) {
1511                         if (one_file_system) {
1512                                 uint32 *devp = F_DIR_DEV_P(file);
1513                                 DEV_MAJOR(devp) = major(real_sx.st.st_dev);
1514                                 DEV_MINOR(devp) = minor(real_sx.st.st_dev);
1515                         }
1516                 }
1517                 else if (delete_during && f_out != -1 && !phase
1518                     && !(file->flags & FLAG_MISSING_DIR)) {
1519                         if (file->flags & FLAG_CONTENT_DIR)
1520                                 delete_in_dir(fname, file, real_sx.st.st_dev);
1521                         else
1522                                 change_local_filter_dir(fname, strlen(fname), F_DEPTH(file));
1523                 }
1524                 prior_dir_file = file;
1525                 goto cleanup;
1526         }
1527
1528         /* If we're not preserving permissions, change the file-list's
1529          * mode based on the local permissions and some heuristics. */
1530         if (!preserve_perms) {
1531                 int exists = statret == 0 && stype != FT_DIR;
1532                 file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms, exists);
1533         }
1534
1535 #ifdef SUPPORT_HARD_LINKS
1536         if (preserve_hard_links && F_HLINK_NOT_FIRST(file)
1537          && hard_link_check(file, ndx, fname, statret, &sx, itemizing, code))
1538                 goto cleanup;
1539 #endif
1540
1541         if (preserve_links && ftype == FT_SYMLINK) {
1542 #ifdef SUPPORT_LINKS
1543                 const char *sl = F_SYMLINK(file);
1544                 if (safe_symlinks && unsafe_symlink(sl, fname)) {
1545                         if (INFO_GTE(NAME, 1)) {
1546                                 if (solo_file) {
1547                                         /* fname contains the destination path, but we
1548                                          * want to report the source path. */
1549                                         fname = f_name(file, NULL);
1550                                 }
1551                                 rprintf(FINFO,
1552                                         "ignoring unsafe symlink \"%s\" -> \"%s\"\n",
1553                                         fname, sl);
1554                         }
1555                         goto cleanup;
1556                 }
1557                 if (statret == 0) {
1558                         if (stype == FT_SYMLINK && quick_check_ok(stype, fname, file, &sx.st)) {
1559                                 /* The link is pointing to the right place. */
1560                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1561                                 if (itemizing)
1562                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1563 #ifdef SUPPORT_HARD_LINKS
1564                                 if (preserve_hard_links && F_IS_HLINKED(file))
1565                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1566 #endif
1567                                 if (remove_source_files == 1)
1568                                         goto return_with_success;
1569                                 goto cleanup;
1570                         }
1571                 } else if (basis_dir[0] != NULL) {
1572                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx, itemizing, code);
1573                         if (j == -2) {
1574 #ifndef CAN_HARDLINK_SYMLINK
1575                                 if (alt_dest_type == LINK_DEST) {
1576                                         /* Resort to --copy-dest behavior. */
1577                                 } else
1578 #endif
1579                                 if (alt_dest_type != COPY_DEST)
1580                                         goto cleanup;
1581                                 itemizing = 0;
1582                                 code = FNONE;
1583                         } else if (j >= 0) {
1584                                 statret = 1;
1585                                 fnamecmp = fnamecmpbuf;
1586                         }
1587                 }
1588                 if (atomic_create(file, fname, sl, NULL, MAKEDEV(0, 0), &sx, statret == 0 ? DEL_FOR_SYMLINK : 0)) {
1589                         set_file_attrs(fname, file, NULL, NULL, 0);
1590                         if (itemizing) {
1591                                 if (statret == 0 && stype != FT_SYMLINK)
1592                                         statret = -1;
1593                                 itemize(fnamecmp, file, ndx, statret, &sx,
1594                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1595                         }
1596                         if (code != FNONE && INFO_GTE(NAME, 1))
1597                                 rprintf(code, "%s -> %s\n", fname, sl);
1598 #ifdef SUPPORT_HARD_LINKS
1599                         if (preserve_hard_links && F_IS_HLINKED(file))
1600                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1601 #endif
1602                         /* This does not check remove_source_files == 1
1603                          * because this is one of the items that the old
1604                          * --remove-sent-files option would remove. */
1605                         if (remove_source_files)
1606                                 goto return_with_success;
1607                 }
1608 #endif
1609                 goto cleanup;
1610         }
1611
1612         if ((am_root && preserve_devices && ftype == FT_DEVICE)
1613          || (preserve_specials && ftype == FT_SPECIAL)) {
1614                 dev_t rdev;
1615                 int del_for_flag;
1616                 if (ftype == FT_DEVICE) {
1617                         uint32 *devp = F_RDEV_P(file);
1618                         rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
1619                         del_for_flag = DEL_FOR_DEVICE;
1620                 } else {
1621                         rdev = 0;
1622                         del_for_flag = DEL_FOR_SPECIAL;
1623                 }
1624                 if (statret == 0) {
1625                         if (ftype != stype)
1626                                 statret = -1;
1627                         else if (quick_check_ok(ftype, fname, file, &sx.st)) {
1628                                 /* The device or special file is identical. */
1629                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1630                                 if (itemizing)
1631                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1632 #ifdef SUPPORT_HARD_LINKS
1633                                 if (preserve_hard_links && F_IS_HLINKED(file))
1634                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1635 #endif
1636                                 if (remove_source_files == 1)
1637                                         goto return_with_success;
1638                                 goto cleanup;
1639                         }
1640                 } else if (basis_dir[0] != NULL) {
1641                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx, itemizing, code);
1642                         if (j == -2) {
1643 #ifndef CAN_HARDLINK_SPECIAL
1644                                 if (alt_dest_type == LINK_DEST) {
1645                                         /* Resort to --copy-dest behavior. */
1646                                 } else
1647 #endif
1648                                 if (alt_dest_type != COPY_DEST)
1649                                         goto cleanup;
1650                                 itemizing = 0;
1651                                 code = FNONE;
1652                         } else if (j >= 0) {
1653                                 statret = 1;
1654                                 fnamecmp = fnamecmpbuf;
1655                         }
1656                 }
1657                 if (DEBUG_GTE(GENR, 1)) {
1658                         rprintf(FINFO, "mknod(%s, 0%o, [%ld,%ld])\n",
1659                                 fname, (int)file->mode,
1660                                 (long)major(rdev), (long)minor(rdev));
1661                 }
1662                 if (atomic_create(file, fname, NULL, NULL, rdev, &sx, del_for_flag)) {
1663                         set_file_attrs(fname, file, NULL, NULL, 0);
1664                         if (itemizing) {
1665                                 itemize(fnamecmp, file, ndx, statret, &sx,
1666                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1667                         }
1668                         if (code != FNONE && INFO_GTE(NAME, 1))
1669                                 rprintf(code, "%s\n", fname);
1670 #ifdef SUPPORT_HARD_LINKS
1671                         if (preserve_hard_links && F_IS_HLINKED(file))
1672                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1673 #endif
1674                         if (remove_source_files == 1)
1675                                 goto return_with_success;
1676                 }
1677                 goto cleanup;
1678         }
1679
1680         if (ftype != FT_REG) {
1681                 if (INFO_GTE(NONREG, 1)) {
1682                         if (solo_file)
1683                                 fname = f_name(file, NULL);
1684                         rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1685                 }
1686                 goto cleanup;
1687         }
1688
1689         if (max_size >= 0 && F_LENGTH(file) > max_size) {
1690                 if (INFO_GTE(SKIP, 1)) {
1691                         if (solo_file)
1692                                 fname = f_name(file, NULL);
1693                         rprintf(FINFO, "%s is over max-size\n", fname);
1694                 }
1695                 goto cleanup;
1696         }
1697         if (min_size >= 0 && F_LENGTH(file) < min_size) {
1698                 if (INFO_GTE(SKIP, 1)) {
1699                         if (solo_file)
1700                                 fname = f_name(file, NULL);
1701                         rprintf(FINFO, "%s is under min-size\n", fname);
1702                 }
1703                 goto cleanup;
1704         }
1705
1706         if (update_only > 0 && statret == 0 && file->modtime - sx.st.st_mtime < modify_window) {
1707                 if (INFO_GTE(SKIP, 1))
1708                         rprintf(FINFO, "%s is newer\n", fname);
1709 #ifdef SUPPORT_HARD_LINKS
1710                 if (F_IS_HLINKED(file))
1711                         handle_skipped_hlink(file, itemizing, code, f_out);
1712 #endif
1713                 goto cleanup;
1714         }
1715
1716         fnamecmp_type = FNAMECMP_FNAME;
1717
1718         if (statret == 0 && !(stype == FT_REG || (write_devices && stype == FT_DEVICE))) {
1719                 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_FILE) != 0)
1720                         goto cleanup;
1721                 statret = -1;
1722                 stat_errno = ENOENT;
1723         }
1724
1725         if (basis_dir[0] != NULL && (statret != 0 || alt_dest_type != COPY_DEST)) {
1726                 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &sx, statret == 0, itemizing, code);
1727                 if (j == -2) {
1728                         if (remove_source_files == 1)
1729                                 goto return_with_success;
1730                         goto cleanup;
1731                 }
1732                 if (j >= 0) {
1733                         fnamecmp = fnamecmpbuf;
1734                         fnamecmp_type = j;
1735                         statret = 0;
1736                 }
1737         }
1738
1739         init_stat_x(&real_sx);
1740         real_sx.st = sx.st; /* Don't copy xattr/acl pointers, as they would free wrong. */
1741         real_ret = statret;
1742
1743         if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1744          && link_stat(partialptr, &partial_st, 0) == 0
1745          && S_ISREG(partial_st.st_mode)) {
1746                 if (statret != 0)
1747                         goto prepare_to_open;
1748         } else
1749                 partialptr = NULL;
1750
1751         if (statret != 0 && fuzzy_basis) {
1752                 if (need_fuzzy_dirlist) {
1753                         const char *dn = file->dirname ? file->dirname : ".";
1754                         int i;
1755                         strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf);
1756                         for (i = 0; i < fuzzy_basis; i++) {
1757                                 if (i && pathjoin(fnamecmpbuf, MAXPATHLEN, basis_dir[i-1], dn) >= MAXPATHLEN)
1758                                         continue;
1759                                 fuzzy_dirlist[i] = get_dirlist(fnamecmpbuf, -1, GDL_IGNORE_FILTER_RULES | GDL_PERHAPS_DIR);
1760                                 if (fuzzy_dirlist[i] && fuzzy_dirlist[i]->used == 0) {
1761                                         flist_free(fuzzy_dirlist[i]);
1762                                         fuzzy_dirlist[i] = NULL;
1763                                 }
1764                         }
1765                         need_fuzzy_dirlist = 0;
1766                 }
1767
1768                 /* Sets fnamecmp_type to FNAMECMP_FUZZY or above. */
1769                 fuzzy_file = find_fuzzy(file, fuzzy_dirlist, &fnamecmp_type);
1770                 if (fuzzy_file) {
1771                         f_name(fuzzy_file, fnamecmpbuf);
1772                         if (DEBUG_GTE(FUZZY, 1)) {
1773                                 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1774                                         fname, fnamecmpbuf);
1775                         }
1776                         sx.st.st_size = F_LENGTH(fuzzy_file);
1777                         statret = 0;
1778                         fnamecmp = fnamecmpbuf;
1779                 }
1780         }
1781
1782         if (statret != 0) {
1783 #ifdef SUPPORT_HARD_LINKS
1784                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1785                         cur_flist->in_progress++;
1786                         goto cleanup;
1787                 }
1788 #endif
1789                 if (stat_errno == ENOENT)
1790                         goto notify_others;
1791                 rsyserr(FERROR_XFER, stat_errno, "recv_generator: failed to stat %s",
1792                         full_fname(fname));
1793                 goto cleanup;
1794         }
1795
1796         if (write_devices && IS_DEVICE(sx.st.st_mode) && sx.st.st_size == 0) {
1797                 /* This early open into fd skips the regular open below. */
1798                 if ((fd = do_open(fnamecmp, O_RDONLY, 0)) >= 0)
1799                         real_sx.st.st_size = sx.st.st_size = get_device_size(fd, fnamecmp);
1800         }
1801
1802         if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1803                 ;
1804         else if (fnamecmp_type >= FNAMECMP_FUZZY)
1805                 ;
1806         else if (quick_check_ok(FT_REG, fnamecmp, file, &sx.st)) {
1807                 if (partialptr) {
1808                         do_unlink(partialptr);
1809                         handle_partial_dir(partialptr, PDIR_DELETE);
1810                 }
1811                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT | maybe_ATTRS_ACCURATE_TIME);
1812                 if (itemizing)
1813                         itemize(fnamecmp, file, ndx, statret, &sx, 0, 0, NULL);
1814 #ifdef SUPPORT_HARD_LINKS
1815                 if (preserve_hard_links && F_IS_HLINKED(file))
1816                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1817 #endif
1818                 if (remove_source_files != 1)
1819                         goto cleanup;
1820           return_with_success:
1821                 if (!dry_run)
1822                         send_msg_int(MSG_SUCCESS, ndx);
1823                 goto cleanup;
1824         }
1825
1826         if (append_mode > 0 && sx.st.st_size >= F_LENGTH(file)) {
1827 #ifdef SUPPORT_HARD_LINKS
1828                 if (F_IS_HLINKED(file))
1829                         handle_skipped_hlink(file, itemizing, code, f_out);
1830 #endif
1831                 goto cleanup;
1832         }
1833
1834   prepare_to_open:
1835         if (partialptr) {
1836                 sx.st = partial_st;
1837                 fnamecmp = partialptr;
1838                 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1839                 statret = 0;
1840         }
1841
1842         if (!do_xfers)
1843                 goto notify_others;
1844
1845         if (read_batch || whole_file) {
1846                 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1847                         if (!(backupptr = get_backup_name(fname)))
1848                                 goto cleanup;
1849                         if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
1850                                 goto pretend_missing;
1851                         if (copy_file(fname, backupptr, -1, back_file->mode) < 0) {
1852                                 unmake_file(back_file);
1853                                 back_file = NULL;
1854                                 goto cleanup;
1855                         }
1856                 }
1857                 goto notify_others;
1858         }
1859
1860         if (fuzzy_dirlist[0]) {
1861                 int j = flist_find(fuzzy_dirlist[0], file);
1862                 if (j >= 0) /* don't use changing file as future fuzzy basis */
1863                         fuzzy_dirlist[0]->files[j]->flags |= FLAG_FILE_SENT;
1864         }
1865
1866         /* open the file */
1867         if (fd < 0 && (fd = do_open(fnamecmp, O_RDONLY, 0)) < 0) {
1868                 rsyserr(FERROR, errno, "failed to open %s, continuing",
1869                         full_fname(fnamecmp));
1870           pretend_missing:
1871                 /* pretend the file didn't exist */
1872 #ifdef SUPPORT_HARD_LINKS
1873                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1874                         cur_flist->in_progress++;
1875                         goto cleanup;
1876                 }
1877 #endif
1878                 statret = real_ret = -1;
1879                 goto notify_others;
1880         }
1881
1882         if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1883                 if (!(backupptr = get_backup_name(fname))) {
1884                         goto cleanup;
1885                 }
1886                 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1887                         goto pretend_missing;
1888                 }
1889                 if (robust_unlink(backupptr) && errno != ENOENT) {
1890                         rsyserr(FERROR_XFER, errno, "unlink %s",
1891                                 full_fname(backupptr));
1892                         unmake_file(back_file);
1893                         back_file = NULL;
1894                         goto cleanup;
1895                 }
1896                 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1897                         rsyserr(FERROR_XFER, errno, "open %s", full_fname(backupptr));
1898                         unmake_file(back_file);
1899                         back_file = NULL;
1900                         goto cleanup;
1901                 }
1902                 fnamecmp_type = FNAMECMP_BACKUP;
1903         }
1904
1905         if (DEBUG_GTE(DELTASUM, 3)) {
1906                 rprintf(FINFO, "gen mapped %s of size %s\n",
1907                         fnamecmp, big_num(sx.st.st_size));
1908         }
1909
1910         if (DEBUG_GTE(DELTASUM, 2))
1911                 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1912
1913   notify_others:
1914         if (remove_source_files && !delay_updates && !phase && !dry_run)
1915                 increment_active_files(ndx, itemizing, code);
1916         if (inc_recurse && (!dry_run || write_batch < 0))
1917                 cur_flist->in_progress++;
1918 #ifdef SUPPORT_HARD_LINKS
1919         if (preserve_hard_links && F_IS_HLINKED(file))
1920                 file->flags |= FLAG_FILE_SENT;
1921 #endif
1922         write_ndx(f_out, ndx);
1923         if (itemizing) {
1924                 int iflags = ITEM_TRANSFER;
1925                 if (always_checksum > 0)
1926                         iflags |= ITEM_REPORT_CHANGE;
1927                 if (fnamecmp_type != FNAMECMP_FNAME)
1928                         iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1929                 if (fnamecmp_type >= FNAMECMP_FUZZY)
1930                         iflags |= ITEM_XNAME_FOLLOWS;
1931                 itemize(fnamecmp, file, -1, real_ret, &real_sx, iflags, fnamecmp_type,
1932                         fuzzy_file ? fuzzy_file->basename : NULL);
1933                 free_stat_x(&real_sx);
1934         }
1935
1936         if (!do_xfers) {
1937 #ifdef SUPPORT_HARD_LINKS
1938                 if (preserve_hard_links && F_IS_HLINKED(file))
1939                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1940 #endif
1941                 goto cleanup;
1942         }
1943         if (read_batch)
1944                 goto cleanup;
1945
1946         if (statret != 0 || whole_file)
1947                 write_sum_head(f_out, NULL);
1948         else if (sx.st.st_size <= 0) {
1949                 write_sum_head(f_out, NULL);
1950         } else {
1951                 if (generate_and_send_sums(fd, sx.st.st_size, f_out, f_copy) < 0) {
1952                         rprintf(FWARNING,
1953                                 "WARNING: file is too large for checksum sending: %s\n",
1954                                 fnamecmp);
1955                         write_sum_head(f_out, NULL);
1956                 }
1957         }
1958
1959   cleanup:
1960         if (fd >= 0)
1961                 close(fd);
1962         if (back_file) {
1963                 int save_preserve_xattrs = preserve_xattrs;
1964                 if (f_copy >= 0)
1965                         close(f_copy);
1966 #ifdef SUPPORT_XATTRS
1967                 if (preserve_xattrs) {
1968                         copy_xattrs(fname, backupptr);
1969                         preserve_xattrs = 0;
1970                 }
1971 #endif
1972                 set_file_attrs(backupptr, back_file, NULL, NULL, 0);
1973                 preserve_xattrs = save_preserve_xattrs;
1974                 if (INFO_GTE(BACKUP, 1)) {
1975                         rprintf(FINFO, "backed up %s to %s\n",
1976                                 fname, backupptr);
1977                 }
1978                 unmake_file(back_file);
1979         }
1980
1981         free_stat_x(&sx);
1982 }
1983
1984 /* If we are replacing an existing hard link, symlink, device, or special file,
1985  * create a temp-name item and rename it into place.  A symlimk specifies slnk,
1986  * a hard link specifies hlnk, otherwise we create a device based on rdev.
1987  * Specify 0 for the del_for_flag if there is not a file to replace.  This
1988  * returns 1 on success and 0 on failure. */
1989 int atomic_create(struct file_struct *file, char *fname, const char *slnk, const char *hlnk,
1990                   dev_t rdev, stat_x *sxp, int del_for_flag)
1991 {
1992         char tmpname[MAXPATHLEN];
1993         const char *create_name;
1994         int skip_atomic, dir_in_the_way = del_for_flag && S_ISDIR(sxp->st.st_mode);
1995
1996         if (!del_for_flag || dir_in_the_way || tmpdir || !get_tmpname(tmpname, fname, True))
1997                 skip_atomic = 1;
1998         else
1999                 skip_atomic = 0;
2000
2001         if (del_for_flag) {
2002                 if (make_backups > 0 && !dir_in_the_way) {
2003                         if (!make_backup(fname, skip_atomic))
2004                                 return 0;
2005                 } else if (skip_atomic) {
2006                         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
2007                         if (delete_item(fname, sxp->st.st_mode, del_opts | del_for_flag) != 0)
2008                                 return 0;
2009                 }
2010         }
2011
2012         create_name = skip_atomic ? fname : tmpname;
2013
2014         if (slnk) {
2015 #ifdef SUPPORT_LINKS
2016                 if (do_symlink(slnk, create_name) < 0) {
2017                         rsyserr(FERROR_XFER, errno, "symlink %s -> \"%s\" failed",
2018                                 full_fname(create_name), slnk);
2019                         return 0;
2020                 }
2021 #else
2022                 return 0;
2023 #endif
2024         } else if (hlnk) {
2025 #ifdef SUPPORT_HARD_LINKS
2026                 if (!hard_link_one(file, create_name, hlnk, 0))
2027                         return 0;
2028 #else
2029                 return 0;
2030 #endif
2031         } else {
2032                 if (do_mknod(create_name, file->mode, rdev) < 0) {
2033                         rsyserr(FERROR_XFER, errno, "mknod %s failed",
2034                                 full_fname(create_name));
2035                         return 0;
2036                 }
2037         }
2038
2039         if (!skip_atomic) {
2040                 if (do_rename(tmpname, fname) < 0) {
2041                         rsyserr(FERROR_XFER, errno, "rename %s -> \"%s\" failed",
2042                                 full_fname(tmpname), full_fname(fname));
2043                         do_unlink(tmpname);
2044                         return 0;
2045                 }
2046         }
2047
2048         return 1;
2049 }
2050
2051 #ifdef SUPPORT_HARD_LINKS
2052 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
2053                                  enum logcode code, int f_out)
2054 {
2055         char fbuf[MAXPATHLEN];
2056         int new_last_ndx;
2057         struct file_list *save_flist = cur_flist;
2058
2059         /* If we skip the last item in a chain of links and there was a
2060          * prior non-skipped hard-link waiting to finish, finish it now. */
2061         if ((new_last_ndx = skip_hard_link(file, &cur_flist)) < 0)
2062                 return;
2063
2064         file = cur_flist->files[new_last_ndx - cur_flist->ndx_start];
2065         cur_flist->in_progress--; /* undo prior increment */
2066         f_name(file, fbuf);
2067         recv_generator(fbuf, file, new_last_ndx, itemizing, code, f_out);
2068
2069         cur_flist = save_flist;
2070 }
2071 #endif
2072
2073 static void touch_up_dirs(struct file_list *flist, int ndx)
2074 {
2075         static int counter = 0;
2076         struct file_struct *file;
2077         char *fname;
2078         BOOL fix_dir_perms;
2079         int i, start, end;
2080
2081         if (ndx < 0) {
2082                 start = 0;
2083                 end = flist->used - 1;
2084         } else
2085                 start = end = ndx;
2086
2087         /* Fix any directory permissions that were modified during the
2088          * transfer and/or re-set any tweaked modified-time values. */
2089         for (i = start; i <= end; i++, counter++) {
2090                 file = flist->files[i];
2091                 if (!F_IS_ACTIVE(file))
2092                         continue;
2093                 if (!S_ISDIR(file->mode)
2094                  || (!implied_dirs && file->flags & FLAG_IMPLIED_DIR))
2095                         continue;
2096                 if (DEBUG_GTE(TIME, 2)) {
2097                         fname = f_name(file, NULL);
2098                         rprintf(FINFO, "touch_up_dirs: %s (%d)\n",
2099                                 NS(fname), i);
2100                 }
2101                 /* Be sure not to retouch permissions with --fake-super. */
2102                 fix_dir_perms = !am_root && !(file->mode & S_IWUSR);
2103                 if (file->flags & FLAG_MISSING_DIR || !(need_retouch_dir_times || fix_dir_perms))
2104                         continue;
2105                 fname = f_name(file, NULL);
2106                 if (fix_dir_perms)
2107                         do_chmod(fname, file->mode);
2108                 if (need_retouch_dir_times) {
2109                         STRUCT_STAT st;
2110                         if (link_stat(fname, &st, 0) == 0 && mtime_differs(&st, file)) {
2111                                 st.st_mtime = file->modtime;
2112 #ifdef ST_MTIME_NSEC
2113                                 st.ST_MTIME_NSEC = F_MOD_NSEC_or_0(file);
2114 #endif
2115                                 set_times(fname, &st);
2116                         }
2117                 }
2118                 if (counter >= loopchk_limit) {
2119                         if (allowed_lull)
2120                                 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
2121                         else
2122                                 maybe_flush_socket(0);
2123                         counter = 0;
2124                 }
2125         }
2126 }
2127
2128 void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
2129 {
2130         struct file_struct *file;
2131         struct file_list *flist;
2132         char fbuf[MAXPATHLEN];
2133         int ndx;
2134
2135         while (1) {
2136 #ifdef SUPPORT_HARD_LINKS
2137                 if (preserve_hard_links && (ndx = get_hlink_num()) != -1) {
2138                         int send_failed = (ndx == -2);
2139                         if (send_failed)
2140                                 ndx = get_hlink_num();
2141                         flist = flist_for_ndx(ndx, "check_for_finished_files.1");
2142                         file = flist->files[ndx - flist->ndx_start];
2143                         assert(file->flags & FLAG_HLINKED);
2144                         if (send_failed)
2145                                 handle_skipped_hlink(file, itemizing, code, sock_f_out);
2146                         else
2147                                 finish_hard_link(file, f_name(file, fbuf), ndx, NULL, itemizing, code, -1);
2148                         flist->in_progress--;
2149                         continue;
2150                 }
2151 #endif
2152
2153                 if (check_redo && (ndx = get_redo_num()) != -1) {
2154                         OFF_T save_max_size = max_size;
2155                         OFF_T save_min_size = min_size;
2156                         csum_length = SUM_LENGTH;
2157                         max_size = -1;
2158                         min_size = -1;
2159                         ignore_existing = -ignore_existing;
2160                         ignore_non_existing = -ignore_non_existing;
2161                         update_only = -update_only;
2162                         always_checksum = -always_checksum;
2163                         size_only = -size_only;
2164                         append_mode = -append_mode;
2165                         make_backups = -make_backups; /* avoid dup backup w/inplace */
2166                         ignore_times++;
2167
2168                         flist = cur_flist;
2169                         cur_flist = flist_for_ndx(ndx, "check_for_finished_files.2");
2170
2171                         file = cur_flist->files[ndx - cur_flist->ndx_start];
2172                         if (solo_file)
2173                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2174                         else
2175                                 f_name(file, fbuf);
2176                         recv_generator(fbuf, file, ndx, itemizing, code, sock_f_out);
2177                         cur_flist->to_redo--;
2178
2179                         cur_flist = flist;
2180
2181                         csum_length = SHORT_SUM_LENGTH;
2182                         max_size = save_max_size;
2183                         min_size = save_min_size;
2184                         ignore_existing = -ignore_existing;
2185                         ignore_non_existing = -ignore_non_existing;
2186                         update_only = -update_only;
2187                         always_checksum = -always_checksum;
2188                         size_only = -size_only;
2189                         append_mode = -append_mode;
2190                         make_backups = -make_backups;
2191                         ignore_times--;
2192                         continue;
2193                 }
2194
2195                 if (cur_flist == first_flist)
2196                         break;
2197
2198                 /* We only get here if inc_recurse is enabled. */
2199                 if (first_flist->in_progress || first_flist->to_redo)
2200                         break;
2201
2202                 write_ndx(sock_f_out, NDX_DONE);
2203                 if (!read_batch && !flist_eof) {
2204                         int old_total = 0;
2205                         for (flist = first_flist; flist != cur_flist; flist = flist->next)
2206                                 old_total += flist->used;
2207                         maybe_flush_socket(!flist_eof && file_total - old_total < MIN_FILECNT_LOOKAHEAD/2);
2208                 }
2209
2210                 if (delete_during == 2 || !dir_tweaking) {
2211                         /* Skip directory touch-up. */
2212                 } else if (first_flist->parent_ndx >= 0)
2213                         touch_up_dirs(dir_flist, first_flist->parent_ndx);
2214
2215                 flist_free(first_flist); /* updates first_flist */
2216         }
2217 }
2218
2219 void generate_files(int f_out, const char *local_name)
2220 {
2221         int i, ndx, next_loopchk = 0;
2222         char fbuf[MAXPATHLEN];
2223         int itemizing;
2224         enum logcode code;
2225         int save_info_flist = info_levels[INFO_FLIST];
2226         int save_info_progress = info_levels[INFO_PROGRESS];
2227
2228         if (protocol_version >= 29) {
2229                 itemizing = 1;
2230                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2231                 code = logfile_format_has_i ? FNONE : FLOG;
2232         } else if (am_daemon) {
2233                 itemizing = logfile_format_has_i && do_xfers;
2234                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2235                 code = itemizing || !do_xfers ? FCLIENT : FINFO;
2236         } else if (!am_server) {
2237                 itemizing = stdout_format_has_i;
2238                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2239                 code = itemizing ? FNONE : FINFO;
2240         } else {
2241                 itemizing = 0;
2242                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2243                 code = FINFO;
2244         }
2245         solo_file = local_name;
2246         dir_tweaking = !(list_only || solo_file || dry_run);
2247         need_retouch_dir_times = preserve_mtimes && !omit_dir_times;
2248         loopchk_limit = allowed_lull ? allowed_lull * 5 : 200;
2249         symlink_timeset_failed_flags = ITEM_REPORT_TIME
2250             | (protocol_version >= 30 || !am_server ? ITEM_REPORT_TIMEFAIL : 0);
2251         implied_dirs_are_missing = relative_paths && !implied_dirs && protocol_version < 30;
2252
2253         if (DEBUG_GTE(GENR, 1))
2254                 rprintf(FINFO, "generator starting pid=%d\n", (int)getpid());
2255
2256         if (delete_before && !solo_file && cur_flist->used > 0)
2257                 do_delete_pass();
2258         if (delete_during == 2) {
2259                 deldelay_size = BIGPATHBUFLEN * 4;
2260                 deldelay_buf = new_array(char, deldelay_size);
2261         }
2262         info_levels[INFO_FLIST] = info_levels[INFO_PROGRESS] = 0;
2263
2264         if (append_mode > 0 || whole_file < 0)
2265                 whole_file = 0;
2266         if (DEBUG_GTE(FLIST, 1)) {
2267                 rprintf(FINFO, "delta-transmission %s\n",
2268                         whole_file
2269                         ? "disabled for local transfer or --whole-file"
2270                         : "enabled");
2271         }
2272
2273         dflt_perms = (ACCESSPERMS & ~orig_umask);
2274
2275         do {
2276 #ifdef SUPPORT_HARD_LINKS
2277                 if (preserve_hard_links && inc_recurse) {
2278                         while (!flist_eof && file_total < MIN_FILECNT_LOOKAHEAD/2)
2279                                 wait_for_receiver();
2280                 }
2281 #endif
2282
2283                 if (inc_recurse && cur_flist->parent_ndx >= 0) {
2284                         struct file_struct *fp = dir_flist->files[cur_flist->parent_ndx];
2285                         if (solo_file)
2286                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2287                         else
2288                                 f_name(fp, fbuf);
2289                         ndx = cur_flist->ndx_start - 1;
2290                         recv_generator(fbuf, fp, ndx, itemizing, code, f_out);
2291                         if (delete_during && dry_run < 2 && !list_only
2292                          && !(fp->flags & FLAG_MISSING_DIR)) {
2293                                 if (fp->flags & FLAG_CONTENT_DIR) {
2294                                         dev_t dirdev;
2295                                         if (one_file_system) {
2296                                                 uint32 *devp = F_DIR_DEV_P(fp);
2297                                                 dirdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
2298                                         } else
2299                                                 dirdev = MAKEDEV(0, 0);
2300                                         delete_in_dir(fbuf, fp, dirdev);
2301                                 } else
2302                                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(fp));
2303                         }
2304                 }
2305                 for (i = cur_flist->low; i <= cur_flist->high; i++) {
2306                         struct file_struct *file = cur_flist->sorted[i];
2307
2308                         if (!F_IS_ACTIVE(file))
2309                                 continue;
2310
2311                         if (unsort_ndx)
2312                                 ndx = F_NDX(file);
2313                         else
2314                                 ndx = i + cur_flist->ndx_start;
2315
2316                         if (solo_file)
2317                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2318                         else
2319                                 f_name(file, fbuf);
2320                         recv_generator(fbuf, file, ndx, itemizing, code, f_out);
2321
2322                         check_for_finished_files(itemizing, code, 0);
2323
2324                         if (i + cur_flist->ndx_start >= next_loopchk) {
2325                                 if (allowed_lull)
2326                                         maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
2327                                 else
2328                                         maybe_flush_socket(0);
2329                                 next_loopchk += loopchk_limit;
2330                         }
2331                 }
2332
2333                 if (!inc_recurse) {
2334                         write_ndx(f_out, NDX_DONE);
2335                         break;
2336                 }
2337
2338                 while (1) {
2339                         check_for_finished_files(itemizing, code, 1);
2340                         if (cur_flist->next || flist_eof)
2341                                 break;
2342                         wait_for_receiver();
2343                 }
2344         } while ((cur_flist = cur_flist->next) != NULL);
2345
2346         if (delete_during)
2347                 delete_in_dir(NULL, NULL, dev_zero);
2348         phase++;
2349         if (DEBUG_GTE(GENR, 1))
2350                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2351
2352         while (1) {
2353                 check_for_finished_files(itemizing, code, 1);
2354                 if (msgdone_cnt)
2355                         break;
2356                 wait_for_receiver();
2357         }
2358
2359         phase++;
2360         if (DEBUG_GTE(GENR, 1))
2361                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2362
2363         write_ndx(f_out, NDX_DONE);
2364
2365         /* Reduce round-trip lag-time for a useless delay-updates phase. */
2366         if (protocol_version >= 29 && EARLY_DELAY_DONE_MSG())
2367                 write_ndx(f_out, NDX_DONE);
2368
2369         if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG()) {
2370                 if ((INFO_GTE(STATS, 2) && (delete_mode || force_delete)) || read_batch)
2371                         write_del_stats(f_out);
2372                 if (EARLY_DELAY_DONE_MSG()) /* Can't send this before delay */
2373                         write_ndx(f_out, NDX_DONE);
2374         }
2375
2376         /* Read MSG_DONE for the redo phase (and any prior messages). */
2377         while (1) {
2378                 check_for_finished_files(itemizing, code, 0);
2379                 if (msgdone_cnt > 1)
2380                         break;
2381                 wait_for_receiver();
2382         }
2383
2384         if (protocol_version >= 29) {
2385                 phase++;
2386                 if (DEBUG_GTE(GENR, 1))
2387                         rprintf(FINFO, "generate_files phase=%d\n", phase);
2388                 if (!EARLY_DELAY_DONE_MSG()) {
2389                         write_ndx(f_out, NDX_DONE);
2390                         if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG())
2391                                 write_ndx(f_out, NDX_DONE);
2392                 }
2393                 /* Read MSG_DONE for delay-updates phase & prior messages. */
2394                 while (msgdone_cnt == 2)
2395                         wait_for_receiver();
2396         }
2397
2398         info_levels[INFO_FLIST] = save_info_flist;
2399         info_levels[INFO_PROGRESS] = save_info_progress;
2400
2401         if (delete_during == 2)
2402                 do_delayed_deletions(fbuf);
2403         if (delete_after && !solo_file && file_total > 0)
2404                 do_delete_pass();
2405
2406         if (max_delete >= 0 && skipped_deletes) {
2407                 rprintf(FWARNING,
2408                         "Deletions stopped due to --max-delete limit (%d skipped)\n",
2409                         skipped_deletes);
2410                 io_error |= IOERR_DEL_LIMIT;
2411         }
2412
2413         if (protocol_version >= 31) {
2414                 if (!EARLY_DELETE_DONE_MSG()) {
2415                         if (INFO_GTE(STATS, 2) || read_batch)
2416                                 write_del_stats(f_out);
2417                         write_ndx(f_out, NDX_DONE);
2418                 }
2419
2420                 /* Read MSG_DONE for late-delete phase & prior messages. */
2421                 while (msgdone_cnt == 3)
2422                         wait_for_receiver();
2423         }
2424
2425         if ((need_retouch_dir_perms || need_retouch_dir_times)
2426          && dir_tweaking && (!inc_recurse || delete_during == 2))
2427                 touch_up_dirs(dir_flist, -1);
2428
2429         if (DEBUG_GTE(GENR, 1))
2430                 rprintf(FINFO, "generate_files finished\n");
2431 }