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) 2003-2020 Wayne Davison
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 3 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, visit the http://fsf.org website.
  21  */
  22
  23 #include "rsync.h"
  24 #include "inums.h"
  25 #include "ifuncs.h"
  26
  27 extern int dry_run;
  28 extern int do_xfers;
  29 extern int stdout_format_has_i;
  30 extern int logfile_format_has_i;
  31 extern int am_root;
  32 extern int am_server;
  33 extern int am_daemon;
  34 extern int inc_recurse;
  35 extern int relative_paths;
  36 extern int implied_dirs;
  37 extern int keep_dirlinks;
  38 extern int preserve_acls;
  39 extern int preserve_xattrs;
  40 extern int preserve_links;
  41 extern int preserve_devices;
  42 extern int write_devices;
  43 extern int preserve_specials;
  44 extern int preserve_hard_links;
  45 extern int preserve_executability;
  46 extern int preserve_perms;
  47 extern int preserve_times;
  48 extern int delete_mode;
  49 extern int delete_before;
  50 extern int delete_during;
  51 extern int delete_after;
  52 extern int missing_args;
  53 extern int msgdone_cnt;
  54 extern int ignore_errors;
  55 extern int remove_source_files;
  56 extern int delay_updates;
  57 extern int update_only;
  58 extern int human_readable;
  59 extern int ignore_existing;
  60 extern int ignore_non_existing;
  61 extern int want_xattr_optim;
  62 extern int modify_window;
  63 extern int inplace;
  64 extern int append_mode;
  65 extern int make_backups;
  66 extern int csum_length;
  67 extern int ignore_times;
  68 extern int size_only;
  69 extern OFF_T max_size;
  70 extern OFF_T min_size;
  71 extern int io_error;
  72 extern int flist_eof;
  73 extern int allowed_lull;
  74 extern int sock_f_out;
  75 extern int protocol_version;
  76 extern int file_total;
  77 extern int fuzzy_basis;
  78 extern int always_checksum;
  79 extern int flist_csum_len;
  80 extern char *partial_dir;
  81 extern int alt_dest_type;
  82 extern int whole_file;
  83 extern int list_only;
  84 extern int read_batch;
  85 extern int write_batch;
  86 extern int safe_symlinks;
  87 extern int32 block_size;
  88 extern int unsort_ndx;
  89 extern int max_delete;
  90 extern int force_delete;
  91 extern int one_file_system;
  92 extern int skipped_deletes;
  93 extern dev_t filesystem_dev;
  94 extern mode_t orig_umask;
  95 extern uid_t our_uid;
  96 extern char *tmpdir;
  97 extern char *basis_dir[MAX_BASIS_DIRS+1];
  98 extern struct file_list *cur_flist, *first_flist, *dir_flist;
  99 extern filter_rule_list filter_list, daemon_filter_list;
 100
 101 int maybe_ATTRS_REPORT = 0;
 102 int maybe_ATTRS_ACCURATE_TIME = 0;
 103
 104 static dev_t dev_zero;
 105 static int deldelay_size = 0, deldelay_cnt = 0;
 106 static char *deldelay_buf = NULL;
 107 static int deldelay_fd = -1;
 108 static int loopchk_limit;
 109 static int dir_tweaking;
 110 static int symlink_timeset_failed_flags;
 111 static int need_retouch_dir_times;
 112 static int need_retouch_dir_perms;
 113 static const char *solo_file = NULL;
 114
 115 /* Forward declarations. */
 116 #ifdef SUPPORT_HARD_LINKS
 117 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
 118                                  enum logcode code, int f_out);
 119 #endif
 120
 121 #define EARLY_DELAY_DONE_MSG() (!delay_updates)
 122 #define EARLY_DELETE_DONE_MSG() (!(delete_during == 2 || delete_after))
 123
 124 static int start_delete_delay_temp(void)
 125 {
 126         char fnametmp[MAXPATHLEN];
 127         int save_dry_run = dry_run;
 128
 129         dry_run = 0;
 130         if (!get_tmpname(fnametmp, "deldelay", False)
 131          || (deldelay_fd = do_mkstemp(fnametmp, 0600)) < 0) {
 132                 rprintf(FINFO, "NOTE: Unable to create delete-delay temp file%s.\n",
 133                         inc_recurse ? "" : " -- switching to --delete-after");
 134                 delete_during = 0;
 135                 delete_after = !inc_recurse;
 136                 dry_run = save_dry_run;
 137                 return 0;
 138         }
 139         unlink(fnametmp);
 140         dry_run = save_dry_run;
 141         return 1;
 142 }
 143
 144 static int flush_delete_delay(void)
 145 {
 146         if (deldelay_fd < 0 && !start_delete_delay_temp())
 147                 return 0;
 148         if (write(deldelay_fd, deldelay_buf, deldelay_cnt) != deldelay_cnt) {
 149                 rsyserr(FERROR, errno, "flush of delete-delay buffer");
 150                 delete_during = 0;
 151                 delete_after = !inc_recurse;
 152                 close(deldelay_fd);
 153                 return 0;
 154         }
 155         deldelay_cnt = 0;
 156         return 1;
 157 }
 158
 159 static int remember_delete(struct file_struct *file, const char *fname, int flags)
 160 {
 161         int len;
 162
 163         if (deldelay_cnt == deldelay_size && !flush_delete_delay())
 164                 return 0;
 165
 166         if (flags & DEL_NO_UID_WRITE)
 167                 deldelay_buf[deldelay_cnt++] = '!';
 168
 169         while (1) {
 170                 len = snprintf(deldelay_buf + deldelay_cnt, deldelay_size - deldelay_cnt,
 171                                "%x %s%c", (int)file->mode, fname, '\0');
 172                 if ((deldelay_cnt += len) <= deldelay_size)
 173                         break;
 174                 deldelay_cnt -= len;
 175                 if (!flush_delete_delay())
 176                         return 0;
 177         }
 178
 179         return 1;
 180 }
 181
 182 static int read_delay_line(char *buf, int *flags_p)
 183 {
 184         static int read_pos = 0;
 185         unsigned int mode;
 186         int j, len;
 187         char *bp, *past_space;
 188
 189         while (1) {
 190                 for (j = read_pos; j < deldelay_cnt && deldelay_buf[j]; j++) {}
 191                 if (j < deldelay_cnt)
 192                         break;
 193                 if (deldelay_fd < 0) {
 194                         if (j > read_pos)
 195                                 goto invalid_data;
 196                         return -1;
 197                 }
 198                 deldelay_cnt -= read_pos;
 199                 if (deldelay_cnt == deldelay_size)
 200                         goto invalid_data;
 201                 if (deldelay_cnt && read_pos) {
 202                         memmove(deldelay_buf, deldelay_buf + read_pos,
 203                                 deldelay_cnt);
 204                 }
 205                 len = read(deldelay_fd, deldelay_buf + deldelay_cnt,
 206                            deldelay_size - deldelay_cnt);
 207                 if (len == 0) {
 208                         if (deldelay_cnt) {
 209                                 rprintf(FERROR, "ERROR: unexpected EOF in delete-delay file.\n");
 210                         }
 211                         return -1;
 212                 }
 213                 if (len < 0) {
 214                         rsyserr(FERROR, errno,
 215                                 "reading delete-delay file");
 216                         return -1;
 217                 }
 218                 deldelay_cnt += len;
 219                 read_pos = 0;
 220         }
 221
 222         bp = deldelay_buf + read_pos;
 223         if (*bp == '!') {
 224                 bp++;
 225                 *flags_p = DEL_NO_UID_WRITE;
 226         } else
 227                 *flags_p = 0;
 228
 229         if (sscanf(bp, "%x ", &mode) != 1) {
 230           invalid_data:
 231                 rprintf(FERROR, "ERROR: invalid data in delete-delay file.\n");
 232                 return -1;
 233         }
 234         past_space = strchr(bp, ' ') + 1;
 235         len = j - read_pos - (past_space - bp) + 1; /* count the '\0' */
 236         read_pos = j + 1;
 237
 238         if (len > MAXPATHLEN) {
 239                 rprintf(FERROR, "ERROR: filename too long in delete-delay file.\n");
 240                 return -1;
 241         }
 242
 243         /* The caller needs the name in a MAXPATHLEN buffer, so we copy it
 244          * instead of returning a pointer to our buffer. */
 245         memcpy(buf, past_space, len);
 246
 247         return mode;
 248 }
 249
 250 static void do_delayed_deletions(char *delbuf)
 251 {
 252         int mode, flags;
 253
 254         if (deldelay_fd >= 0) {
 255                 if (deldelay_cnt && !flush_delete_delay())
 256                         return;
 257                 lseek(deldelay_fd, 0, 0);
 258         }
 259         while ((mode = read_delay_line(delbuf, &flags)) >= 0)
 260                 delete_item(delbuf, mode, flags | DEL_RECURSE);
 261         if (deldelay_fd >= 0)
 262                 close(deldelay_fd);
 263 }
 264
 265 /* This function is used to implement per-directory deletion, and is used by
 266  * all the --delete-WHEN options.  Note that the fbuf pointer must point to a
 267  * MAXPATHLEN buffer with the name of the directory in it (the functions we
 268  * call will append names onto the end, but the old dir value will be restored
 269  * on exit). */
 270 static void delete_in_dir(char *fbuf, struct file_struct *file, dev_t fs_dev)
 271 {
 272         static int already_warned = 0;
 273         static struct hashtable *dev_tbl;
 274         struct file_list *dirlist;
 275         char delbuf[MAXPATHLEN];
 276         int dlen, i;
 277
 278         if (!fbuf) {
 279                 change_local_filter_dir(NULL, 0, 0);
 280                 return;
 281         }
 282
 283         if (DEBUG_GTE(DEL, 2))
 284                 rprintf(FINFO, "delete_in_dir(%s)\n", fbuf);
 285
 286         if (allowed_lull)
 287                 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
 288
 289         if (io_error & IOERR_GENERAL && !ignore_errors) {
 290                 if (already_warned)
 291                         return;
 292                 rprintf(FINFO,
 293                         "IO error encountered -- skipping file deletion\n");
 294                 already_warned = 1;
 295                 return;
 296         }
 297
 298         dlen = strlen(fbuf);
 299         change_local_filter_dir(fbuf, dlen, F_DEPTH(file));
 300
 301         if (one_file_system) {
 302                 if (!dev_tbl)
 303                         dev_tbl = hashtable_create(16, HT_KEY64);
 304                 if (file->flags & FLAG_TOP_DIR) {
 305                         hashtable_find(dev_tbl, fs_dev+1, "");
 306                         filesystem_dev = fs_dev;
 307                 } else if (filesystem_dev != fs_dev) {
 308                         if (!hashtable_find(dev_tbl, fs_dev+1, NULL))
 309                                 return;
 310                         filesystem_dev = fs_dev; /* it's a prior top-dir dev */
 311                 }
 312         }
 313
 314         dirlist = get_dirlist(fbuf, dlen, 0);
 315
 316         /* If an item in dirlist is not found in flist, delete it
 317          * from the filesystem. */
 318         for (i = dirlist->used; i--; ) {
 319                 struct file_struct *fp = dirlist->files[i];
 320                 if (!F_IS_ACTIVE(fp))
 321                         continue;
 322                 if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) {
 323                         if (INFO_GTE(MOUNT, 1))
 324                                 rprintf(FINFO, "cannot delete mount point: %s\n",
 325                                         f_name(fp, NULL));
 326                         continue;
 327                 }
 328                 /* Here we want to match regardless of file type.  Replacement
 329                  * of a file with one of another type is handled separately by
 330                  * a delete_item call with a DEL_MAKE_ROOM flag. */
 331                 if (flist_find_ignore_dirness(cur_flist, fp) < 0) {
 332                         int flags = DEL_RECURSE;
 333                         if (!(fp->mode & S_IWUSR) && !am_root && fp->flags & FLAG_OWNED_BY_US)
 334                                 flags |= DEL_NO_UID_WRITE;
 335                         f_name(fp, delbuf);
 336                         if (delete_during == 2) {
 337                                 if (!remember_delete(fp, delbuf, flags))
 338                                         break;
 339                         } else
 340                                 delete_item(delbuf, fp->mode, flags);
 341                 }
 342         }
 343
 344         flist_free(dirlist);
 345 }
 346
 347 /* This deletes any files on the receiving side that are not present on the
 348  * sending side.  This is used by --delete-before and --delete-after. */
 349 static void do_delete_pass(void)
 350 {
 351         char fbuf[MAXPATHLEN];
 352         STRUCT_STAT st;
 353         int j;
 354
 355         /* dry_run is incremented when the destination doesn't exist yet. */
 356         if (dry_run > 1 || list_only)
 357                 return;
 358
 359         for (j = 0; j < cur_flist->used; j++) {
 360                 struct file_struct *file = cur_flist->sorted[j];
 361
 362                 if (!F_IS_ACTIVE(file))
 363                         continue;
 364
 365                 f_name(file, fbuf);
 366
 367                 if (!(file->flags & FLAG_CONTENT_DIR)) {
 368                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(file));
 369                         continue;
 370                 }
 371
 372                 if (DEBUG_GTE(DEL, 1) && file->flags & FLAG_TOP_DIR)
 373                         rprintf(FINFO, "deleting in %s\n", fbuf);
 374
 375                 if (link_stat(fbuf, &st, keep_dirlinks) < 0
 376                  || !S_ISDIR(st.st_mode))
 377                         continue;
 378
 379                 delete_in_dir(fbuf, file, st.st_dev);
 380         }
 381         delete_in_dir(NULL, NULL, dev_zero);
 382
 383         if (INFO_GTE(FLIST, 2) && !am_server)
 384                 rprintf(FINFO, "                    \r");
 385 }
 386
 387 static inline int mtime_differs(STRUCT_STAT *stp, struct file_struct *file)
 388 {
 389 #ifdef ST_MTIME_NSEC
 390         return !same_time(stp->st_mtime, stp->ST_MTIME_NSEC, file->modtime, F_MOD_NSEC_or_0(file));
 391 #else
 392         return !same_time(stp->st_mtime, 0, file->modtime, 0);
 393 #endif
 394 }
 395
 396 static inline int any_time_differs(stat_x *sxp, struct file_struct *file, UNUSED(const char *fname))
 397 {
 398         int differs = mtime_differs(&sxp->st, file);
 399 #ifdef SUPPORT_CRTIMES
 400         if (!differs && crtimes_ndx) {
 401                 if (sxp->crtime == 0)
 402                         sxp->crtime = get_create_time(fname, &sxp->st);
 403                 differs = !same_time(sxp->crtime, 0, F_CRTIME(file), 0);
 404         }
 405 #endif
 406         return differs;
 407 }
 408
 409 static inline int perms_differ(struct file_struct *file, stat_x *sxp)
 410 {
 411         if (preserve_perms)
 412                 return !BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS);
 413
 414         if (preserve_executability)
 415                 return (sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0);
 416
 417         return 0;
 418 }
 419
 420 static inline int ownership_differs(struct file_struct *file, stat_x *sxp)
 421 {
 422         if (am_root && uid_ndx && sxp->st.st_uid != (uid_t)F_OWNER(file))
 423                 return 1;
 424
 425         if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP) && sxp->st.st_gid != (gid_t)F_GROUP(file))
 426                 return 1;
 427
 428         return 0;
 429 }
 430
 431 #ifdef SUPPORT_ACLS
 432 static inline int acls_differ(const char *fname, struct file_struct *file, stat_x *sxp)
 433 {
 434         if (preserve_acls) {
 435                 if (!ACL_READY(*sxp))
 436                         get_acl(fname, sxp);
 437                 if (set_acl(NULL, file, sxp, file->mode))
 438                         return 1;
 439         }
 440
 441         return 0;
 442 }
 443 #endif
 444
 445 #ifdef SUPPORT_XATTRS
 446 static inline int xattrs_differ(const char *fname, struct file_struct *file, stat_x *sxp)
 447 {
 448         if (preserve_xattrs) {
 449                 if (!XATTR_READY(*sxp))
 450                         get_xattr(fname, sxp);
 451                 if (xattr_diff(file, sxp, 0))
 452                         return 1;
 453         }
 454
 455         return 0;
 456 }
 457 #endif
 458
 459 int unchanged_attrs(const char *fname, struct file_struct *file, stat_x *sxp)
 460 {
 461         if (S_ISLNK(file->mode)) {
 462 #ifdef CAN_SET_SYMLINK_TIMES
 463                 if (preserve_times & PRESERVE_LINK_TIMES && any_time_differs(sxp, file, fname))
 464                         return 0;
 465 #endif
 466 #ifdef CAN_CHMOD_SYMLINK
 467                 if (perms_differ(file, sxp))
 468                         return 0;
 469 #endif
 470 #ifdef CAN_CHOWN_SYMLINK
 471                 if (ownership_differs(file, sxp))
 472                         return 0;
 473 #endif
 474 #if defined SUPPORT_ACLS && 0 /* no current symlink-ACL support */
 475                 if (acls_differ(fname, file, sxp))
 476                         return 0;
 477 #endif
 478 #if defined SUPPORT_XATTRS && !defined NO_SYMLINK_XATTRS
 479                 if (xattrs_differ(fname, file, sxp))
 480                         return 0;
 481 #endif
 482         } else {
 483                 if (preserve_times && any_time_differs(sxp, file, fname))
 484                         return 0;
 485                 if (perms_differ(file, sxp))
 486                         return 0;
 487                 if (ownership_differs(file, sxp))
 488                         return 0;
 489 #ifdef SUPPORT_ACLS
 490                 if (acls_differ(fname, file, sxp))
 491                         return 0;
 492 #endif
 493 #ifdef SUPPORT_XATTRS
 494                 if (xattrs_differ(fname, file, sxp))
 495                         return 0;
 496 #endif
 497         }
 498
 499         return 1;
 500 }
 501
 502 void itemize(const char *fnamecmp, struct file_struct *file, int ndx, int statret,
 503              stat_x *sxp, int32 iflags, uchar fnamecmp_type,
 504              const char *xname)
 505 {
 506         if (statret >= 0) { /* A from-dest-dir statret can == 1! */
 507                 int keep_time = !preserve_times ? 0
 508                     : S_ISDIR(file->mode) ? preserve_times & PRESERVE_DIR_TIMES
 509                     : S_ISLNK(file->mode) ? preserve_times & PRESERVE_LINK_TIMES
 510                     : 1;
 511
 512                 if (S_ISREG(file->mode) && F_LENGTH(file) != sxp->st.st_size)
 513                         iflags |= ITEM_REPORT_SIZE;
 514                 if (file->flags & FLAG_TIME_FAILED) { /* symlinks only */
 515                         if (iflags & ITEM_LOCAL_CHANGE)
 516                                 iflags |= symlink_timeset_failed_flags;
 517                 } else if (keep_time
 518                  ? mtime_differs(&sxp->st, file)
 519                  : iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !(iflags & ITEM_MATCHED)
 520                   && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
 521                         iflags |= ITEM_REPORT_TIME;
 522                 if (atimes_ndx && !S_ISDIR(file->mode) && !S_ISLNK(file->mode)
 523                  && !same_time(F_ATIME(file), 0, sxp->st.st_atime, 0))
 524                         iflags |= ITEM_REPORT_ATIME;
 525 #ifdef SUPPORT_CRTIMES
 526                 if (crtimes_ndx) {
 527                         if (sxp->crtime == 0)
 528                                 sxp->crtime = get_create_time(fnamecmp, &sxp->st);
 529                         if (!same_time(sxp->crtime, 0, F_CRTIME(file), 0))
 530                                 iflags |= ITEM_REPORT_CRTIME;
 531                 }
 532 #endif
 533 #if !defined HAVE_LCHMOD && !defined HAVE_SETATTRLIST
 534                 if (S_ISLNK(file->mode)) {
 535                         ;
 536                 } else
 537 #endif
 538                 if (preserve_perms) {
 539                         if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
 540                                 iflags |= ITEM_REPORT_PERMS;
 541                 } else if (preserve_executability
 542                  && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
 543                         iflags |= ITEM_REPORT_PERMS;
 544                 if (uid_ndx && am_root && (uid_t)F_OWNER(file) != sxp->st.st_uid)
 545                         iflags |= ITEM_REPORT_OWNER;
 546                 if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP) && sxp->st.st_gid != (gid_t)F_GROUP(file))
 547                         iflags |= ITEM_REPORT_GROUP;
 548 #ifdef SUPPORT_ACLS
 549                 if (preserve_acls && !S_ISLNK(file->mode)) {
 550                         if (!ACL_READY(*sxp))
 551                                 get_acl(fnamecmp, sxp);
 552                         if (set_acl(NULL, file, sxp, file->mode))
 553                                 iflags |= ITEM_REPORT_ACL;
 554                 }
 555 #endif
 556 #ifdef SUPPORT_XATTRS
 557                 if (preserve_xattrs) {
 558                         if (!XATTR_READY(*sxp))
 559                                 get_xattr(fnamecmp, sxp);
 560                         if (xattr_diff(file, sxp, 1))
 561                                 iflags |= ITEM_REPORT_XATTR;
 562                 }
 563 #endif
 564         } else {
 565 #ifdef SUPPORT_XATTRS
 566                 if (preserve_xattrs && xattr_diff(file, NULL, 1))
 567                         iflags |= ITEM_REPORT_XATTR;
 568 #endif
 569                 iflags |= ITEM_IS_NEW;
 570         }
 571
 572         iflags &= 0xffff;
 573         if ((iflags & (SIGNIFICANT_ITEM_FLAGS|ITEM_REPORT_XATTR) || INFO_GTE(NAME, 2)
 574           || stdout_format_has_i > 1 || (xname && *xname)) && !read_batch) {
 575                 if (protocol_version >= 29) {
 576                         if (ndx >= 0)
 577                                 write_ndx(sock_f_out, ndx);
 578                         write_shortint(sock_f_out, iflags);
 579                         if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
 580                                 write_byte(sock_f_out, fnamecmp_type);
 581                         if (iflags & ITEM_XNAME_FOLLOWS)
 582                                 write_vstring(sock_f_out, xname, strlen(xname));
 583 #ifdef SUPPORT_XATTRS
 584                         if (preserve_xattrs && do_xfers
 585                          && iflags & (ITEM_REPORT_XATTR|ITEM_TRANSFER)) {
 586                                 int fd = iflags & ITEM_REPORT_XATTR
 587                                       && !(want_xattr_optim && BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE))
 588                                        ? sock_f_out : -1;
 589                                 send_xattr_request(NULL, file, fd);
 590                         }
 591 #endif
 592                 } else if (ndx >= 0) {
 593                         enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
 594                         log_item(code, file, iflags, xname);
 595                 }
 596         }
 597 }
 598
 599 static enum filetype get_file_type(mode_t mode)
 600 {
 601         if (S_ISREG(mode))
 602                 return FT_REG;
 603         if (S_ISLNK(mode))
 604                 return FT_SYMLINK;
 605         if (S_ISDIR(mode))
 606                 return FT_DIR;
 607         if (IS_SPECIAL(mode))
 608                 return FT_SPECIAL;
 609         if (IS_DEVICE(mode))
 610                 return FT_DEVICE;
 611         return FT_UNSUPPORTED;
 612 }
 613
 614 /* Perform our quick-check heuristic for determining if a file is unchanged. */
 615 int quick_check_ok(enum filetype ftype, const char *fn, struct file_struct *file, STRUCT_STAT *st)
 616 {
 617         switch (ftype) {
 618           case FT_REG:
 619                 if (st->st_size != F_LENGTH(file))
 620                         return 0;
 621
 622                 /* If always_checksum is set then we use the checksum instead
 623                  * of the file mtime to determine whether to sync. */
 624                 if (always_checksum > 0) {
 625                         char sum[MAX_DIGEST_LEN];
 626                         file_checksum(fn, st, sum);
 627                         return memcmp(sum, F_SUM(file), flist_csum_len) == 0;
 628                 }
 629
 630                 if (size_only > 0)
 631                         return 1;
 632
 633                 if (ignore_times)
 634                         return 0;
 635
 636                 if (mtime_differs(st, file))
 637                         return 0;
 638                 break;
 639           case FT_DIR:
 640                 break;
 641           case FT_SYMLINK: {
 642 #ifdef SUPPORT_LINKS
 643                 char lnk[MAXPATHLEN];
 644                 int len = do_readlink(fn, lnk, MAXPATHLEN-1);
 645                 if (len <= 0)
 646                         return 0;
 647                 lnk[len] = '\0';
 648                 if (strcmp(lnk, F_SYMLINK(file)) != 0)
 649                         return 0;
 650                 break;
 651 #else
 652                 return -1;
 653 #endif
 654           }
 655           case FT_SPECIAL:
 656                 if (!BITS_EQUAL(file->mode, st->st_mode, _S_IFMT))
 657                         return 0;
 658                 break;
 659           case FT_DEVICE: {
 660                 uint32 *devp = F_RDEV_P(file);
 661                 if (st->st_rdev != MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)))
 662                         return 0;
 663                 break;
 664           }
 665           case FT_UNSUPPORTED:
 666                 return -1;
 667         }
 668         return 1;
 669 }
 670
 671 /*
 672  * set (initialize) the size entries in the per-file sum_struct
 673  * calculating dynamic block and checksum sizes.
 674  *
 675  * This is only called from generate_and_send_sums() but is a separate
 676  * function to encapsulate the logic.
 677  *
 678  * The block size is a rounded square root of file length.
 679  *
 680  * The checksum size is determined according to:
 681  *     blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
 682  * provided by Donovan Baarda which gives a probability of rsync
 683  * algorithm corrupting data and falling back using the whole md4
 684  * checksums.
 685  *
 686  * This might be made one of several selectable heuristics.
 687  */
 688 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
 689 {
 690         int32 blength;
 691         int s2length;
 692         int64 l;
 693
 694         if (len < 0) {
 695                 /* The file length overflowed our int64 var, so we can't process this file. */
 696                 sum->count = -1; /* indicate overflow error */
 697                 return;
 698         }
 699
 700         if (block_size)
 701                 blength = block_size;
 702         else if (len <= BLOCK_SIZE * BLOCK_SIZE)
 703                 blength = BLOCK_SIZE;
 704         else {
 705                 int32 max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE;
 706                 int32 c;
 707                 int cnt;
 708                 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
 709                 if (c < 0 || c >= max_blength)
 710                         blength = max_blength;
 711                 else {
 712                         blength = 0;
 713                         do {
 714                                 blength |= c;
 715                                 if (len < (int64)blength * blength)
 716                                         blength &= ~c;
 717                                 c >>= 1;
 718                         } while (c >= 8);       /* round to multiple of 8 */
 719                         blength = MAX(blength, BLOCK_SIZE);
 720                 }
 721         }
 722
 723         if (protocol_version < 27) {
 724                 s2length = csum_length;
 725         } else if (csum_length == SUM_LENGTH) {
 726                 s2length = SUM_LENGTH;
 727         } else {
 728                 int32 c;
 729                 int b = BLOCKSUM_BIAS;
 730                 for (l = len; l >>= 1; b += 2) {}
 731                 for (c = blength; (c >>= 1) && b; b--) {}
 732                 /* add a bit, subtract rollsum, round up. */
 733                 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
 734                 s2length = MAX(s2length, csum_length);
 735                 s2length = MIN(s2length, SUM_LENGTH);
 736         }
 737
 738         sum->flength    = len;
 739         sum->blength    = blength;
 740         sum->s2length   = s2length;
 741         sum->remainder  = (int32)(len % blength);
 742         sum->count      = (int32)(l = (len / blength) + (sum->remainder != 0));
 743
 744         if ((int64)sum->count != l)
 745                 sum->count = -1;
 746
 747         if (sum->count && DEBUG_GTE(DELTASUM, 2)) {
 748                 rprintf(FINFO,
 749                         "count=%s rem=%ld blength=%ld s2length=%d flength=%s\n",
 750                         big_num(sum->count), (long)sum->remainder, (long)sum->blength,
 751                         sum->s2length, big_num(sum->flength));
 752         }
 753 }
 754
 755
 756 /*
 757  * Generate and send a stream of signatures/checksums that describe a buffer
 758  *
 759  * Generate approximately one checksum every block_len bytes.
 760  */
 761 static int generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
 762 {
 763         int32 i;
 764         struct map_struct *mapbuf;
 765         struct sum_struct sum;
 766         OFF_T offset = 0;
 767
 768         sum_sizes_sqroot(&sum, len);
 769         if (sum.count < 0)
 770                 return -1;
 771         write_sum_head(f_out, &sum);
 772
 773         if (append_mode > 0 && f_copy < 0)
 774                 return 0;
 775
 776         if (len > 0)
 777                 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
 778         else
 779                 mapbuf = NULL;
 780
 781         for (i = 0; i < sum.count; i++) {
 782                 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
 783                 char *map = map_ptr(mapbuf, offset, n1);
 784                 char sum2[SUM_LENGTH];
 785                 uint32 sum1;
 786
 787                 len -= n1;
 788                 offset += n1;
 789
 790                 if (f_copy >= 0) {
 791                         full_write(f_copy, map, n1);
 792                         if (append_mode > 0)
 793                                 continue;
 794                 }
 795
 796                 sum1 = get_checksum1(map, n1);
 797                 get_checksum2(map, n1, sum2);
 798
 799                 if (DEBUG_GTE(DELTASUM, 3)) {
 800                         rprintf(FINFO,
 801                                 "chunk[%s] offset=%s len=%ld sum1=%08lx\n",
 802                                 big_num(i), big_num(offset - n1), (long)n1,
 803                                 (unsigned long)sum1);
 804                 }
 805                 write_int(f_out, sum1);
 806                 write_buf(f_out, sum2, sum.s2length);
 807         }
 808
 809         if (mapbuf)
 810                 unmap_file(mapbuf);
 811
 812         return 0;
 813 }
 814
 815
 816 /* Try to find a filename in the same dir as "fname" with a similar name. */
 817 static struct file_struct *find_fuzzy(struct file_struct *file, struct file_list *dirlist_array[], uchar *fnamecmp_type_ptr)
 818 {
 819         int fname_len, fname_suf_len;
 820         const char *fname_suf, *fname = file->basename;
 821         uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
 822         int i, j;
 823         struct file_struct *lowest_fp = NULL;
 824
 825         fname_len = strlen(fname);
 826         fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
 827
 828         /* Try to find an exact size+mtime match first. */
 829         for (i = 0; i < fuzzy_basis; i++) {
 830                 struct file_list *dirlist = dirlist_array[i];
 831
 832                 if (!dirlist)
 833                         continue;
 834
 835                 for (j = 0; j < dirlist->used; j++) {
 836                         struct file_struct *fp = dirlist->files[j];
 837
 838                         if (!F_IS_ACTIVE(fp))
 839                                 continue;
 840
 841                         if (!S_ISREG(fp->mode) || !F_LENGTH(fp) || fp->flags & FLAG_FILE_SENT)
 842                                 continue;
 843
 844                         if (F_LENGTH(fp) == F_LENGTH(file) && same_time(fp->modtime, 0, file->modtime, 0)) {
 845                                 if (DEBUG_GTE(FUZZY, 2))
 846                                         rprintf(FINFO, "fuzzy size/modtime match for %s\n", f_name(fp, NULL));
 847                                 *fnamecmp_type_ptr = FNAMECMP_FUZZY + i;
 848                                 return fp;
 849                         }
 850
 851                 }
 852         }
 853
 854         for (i = 0; i < fuzzy_basis; i++) {
 855                 struct file_list *dirlist = dirlist_array[i];
 856
 857                 if (!dirlist)
 858                         continue;
 859
 860                 for (j = 0; j < dirlist->used; j++) {
 861                         struct file_struct *fp = dirlist->files[j];
 862                         const char *suf, *name;
 863                         int len, suf_len;
 864                         uint32 dist;
 865
 866                         if (!F_IS_ACTIVE(fp))
 867                                 continue;
 868
 869                         if (!S_ISREG(fp->mode) || !F_LENGTH(fp) || fp->flags & FLAG_FILE_SENT)
 870                                 continue;
 871
 872                         name = fp->basename;
 873                         len = strlen(name);
 874                         suf = find_filename_suffix(name, len, &suf_len);
 875
 876                         dist = fuzzy_distance(name, len, fname, fname_len);
 877                         /* Add some extra weight to how well the suffixes match. */
 878                         dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len) * 10;
 879                         if (DEBUG_GTE(FUZZY, 2)) {
 880                                 rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
 881                                         f_name(fp, NULL), (int)(dist>>16), (int)(dist&0xFFFF));
 882                         }
 883                         if (dist <= lowest_dist) {
 884                                 lowest_dist = dist;
 885                                 lowest_fp = fp;
 886                                 *fnamecmp_type_ptr = FNAMECMP_FUZZY + i;
 887                         }
 888                 }
 889         }
 890
 891         return lowest_fp;
 892 }
 893
 894 /* Copy a file found in our --copy-dest handling. */
 895 static int copy_altdest_file(const char *src, const char *dest, struct file_struct *file)
 896 {
 897         char buf[MAXPATHLEN];
 898         const char *copy_to, *partialptr;
 899         int save_preserve_xattrs = preserve_xattrs;
 900         int ok, fd_w;
 901
 902         if (inplace) {
 903                 /* Let copy_file open the destination in place. */
 904                 fd_w = -1;
 905                 copy_to = dest;
 906         } else {
 907                 fd_w = open_tmpfile(buf, dest, file);
 908                 if (fd_w < 0)
 909                         return -1;
 910                 copy_to = buf;
 911         }
 912         cleanup_set(copy_to, NULL, NULL, -1, -1);
 913         if (copy_file(src, copy_to, fd_w, file->mode) < 0) {
 914                 if (INFO_GTE(COPY, 1)) {
 915                         rsyserr(FINFO, errno, "copy_file %s => %s",
 916                                 full_fname(src), copy_to);
 917                 }
 918                 /* Try to clean up. */
 919                 unlink(copy_to);
 920                 cleanup_disable();
 921                 return -1;
 922         }
 923         partialptr = partial_dir ? partial_dir_fname(dest) : NULL;
 924         preserve_xattrs = 0; /* xattrs were copied with file */
 925         ok = finish_transfer(dest, copy_to, src, partialptr, file, 1, 0);
 926         preserve_xattrs = save_preserve_xattrs;
 927         cleanup_disable();
 928         return ok ? 0 : -1;
 929 }
 930
 931 /* This is only called for regular files.  We return -2 if we've finished
 932  * handling the file, -1 if no dest-linking occurred, or a non-negative
 933  * value if we found an alternate basis file.  If we're called with the
 934  * find_exact_for_existing flag, the destination file already exists, so
 935  * we only try to find an exact alt-dest match.  In this case, the returns
 936  * are only -2 & -1 (both as above). */
 937 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
 938                          char *cmpbuf, stat_x *sxp, int find_exact_for_existing,
 939                          int itemizing, enum logcode code)
 940 {
 941         STRUCT_STAT real_st = sxp->st;
 942         int best_match = -1;
 943         int match_level = 0;
 944         int j = 0;
 945
 946         do {
 947                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 948                 if (link_stat(cmpbuf, &sxp->st, 0) < 0 || !S_ISREG(sxp->st.st_mode))
 949                         continue;
 950                 if (match_level == 0) {
 951                         best_match = j;
 952                         match_level = 1;
 953                 }
 954                 if (!quick_check_ok(FT_REG, cmpbuf, file, &sxp->st))
 955                         continue;
 956                 if (match_level == 1) {
 957                         best_match = j;
 958                         match_level = 2;
 959                 }
 960                 if (unchanged_attrs(cmpbuf, file, sxp)) {
 961                         best_match = j;
 962                         match_level = 3;
 963                         break;
 964                 }
 965                 free_stat_x(sxp);
 966         } while (basis_dir[++j] != NULL);
 967
 968         if (!match_level)
 969                 goto got_nothing_for_ya;
 970
 971         if (j != best_match) {
 972                 j = best_match;
 973                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 974                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
 975                         goto got_nothing_for_ya;
 976         }
 977
 978         if (match_level == 3 && alt_dest_type != COPY_DEST) {
 979                 if (find_exact_for_existing) {
 980                         if (alt_dest_type == LINK_DEST && real_st.st_dev == sxp->st.st_dev && real_st.st_ino == sxp->st.st_ino)
 981                                 return -1;
 982                         if (do_unlink(fname) < 0 && errno != ENOENT)
 983                                 goto got_nothing_for_ya;
 984                 }
 985 #ifdef SUPPORT_HARD_LINKS
 986                 if (alt_dest_type == LINK_DEST) {
 987                         if (!hard_link_one(file, fname, cmpbuf, 1))
 988                                 goto try_a_copy;
 989                         if (atimes_ndx)
 990                                 set_file_attrs(fname, file, sxp, NULL, 0);
 991                         if (preserve_hard_links && F_IS_HLINKED(file))
 992                                 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, j);
 993                         if (!maybe_ATTRS_REPORT && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
 994                                 itemize(cmpbuf, file, ndx, 1, sxp,
 995                                         ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS,
 996                                         0, "");
 997                         }
 998                 } else
 999 #endif
1000                 {
1001                         if (itemizing)
1002                                 itemize(cmpbuf, file, ndx, 0, sxp, 0, 0, NULL);
1003                 }
1004                 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT)
1005                         rprintf(FCLIENT, "%s is uptodate\n", fname);
1006                 return -2;
1007         }
1008
1009         if (find_exact_for_existing)
1010                 goto got_nothing_for_ya;
1011
1012         if (match_level >= 2) {
1013 #ifdef SUPPORT_HARD_LINKS
1014           try_a_copy: /* Copy the file locally. */
1015 #endif
1016                 if (!dry_run && copy_altdest_file(cmpbuf, fname, file) < 0) {
1017                         if (find_exact_for_existing) /* Can get here via hard-link failure */
1018                                 goto got_nothing_for_ya;
1019                         return -1;
1020                 }
1021                 if (itemizing)
1022                         itemize(cmpbuf, file, ndx, 0, sxp, ITEM_LOCAL_CHANGE, 0, NULL);
1023                 if (maybe_ATTRS_REPORT
1024                  && ((!itemizing && INFO_GTE(NAME, 1) && match_level == 2)
1025                   || (INFO_GTE(NAME, 2) && match_level == 3))) {
1026                         code = match_level == 3 ? FCLIENT : FINFO;
1027                         rprintf(code, "%s%s\n", fname,
1028                                 match_level == 3 ? " is uptodate" : "");
1029                 }
1030 #ifdef SUPPORT_HARD_LINKS
1031                 if (preserve_hard_links && F_IS_HLINKED(file))
1032                         finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, -1);
1033 #endif
1034                 return -2;
1035         }
1036
1037         return FNAMECMP_BASIS_DIR_LOW + j;
1038
1039 got_nothing_for_ya:
1040         sxp->st = real_st;
1041         return -1;
1042 }
1043
1044 /* This is only called for non-regular files.  We return -2 if we've finished
1045  * handling the file, or -1 if no dest-linking occurred, or a non-negative
1046  * value if we found an alternate basis file. */
1047 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
1048                          char *cmpbuf, stat_x *sxp, int itemizing,
1049                          enum logcode code)
1050 {
1051         int best_match = -1;
1052         int match_level = 0;
1053         enum filetype ftype = get_file_type(file->mode);
1054         int j = 0;
1055
1056 #ifndef SUPPORT_LINKS
1057         if (ftype == FT_SYMLINK)
1058                 return -1;
1059 #endif
1060         if (ftype == FT_REG || ftype == FT_UNSUPPORTED) {
1061                 rprintf(FERROR,
1062                         "internal: try_dests_non() called with invalid mode (%o)\n",
1063                         (int)file->mode);
1064                 exit_cleanup(RERR_UNSUPPORTED);
1065         }
1066
1067         do {
1068                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1069                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1070                         continue;
1071                 if (ftype != get_file_type(sxp->st.st_mode))
1072                         continue;
1073                 if (match_level < 1) {
1074                         match_level = 1;
1075                         best_match = j;
1076                 }
1077                 if (!quick_check_ok(ftype, cmpbuf, file, &sxp->st))
1078                         continue;
1079                 if (match_level < 2) {
1080                         match_level = 2;
1081                         best_match = j;
1082                 }
1083                 if (unchanged_attrs(cmpbuf, file, sxp)) {
1084                         match_level = 3;
1085                         best_match = j;
1086                         break;
1087                 }
1088         } while (basis_dir[++j] != NULL);
1089
1090         if (!match_level)
1091                 return -1;
1092
1093         if (j != best_match) {
1094                 j = best_match;
1095                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1096                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1097                         return -1;
1098         }
1099
1100         if (match_level == 3) {
1101 #ifdef SUPPORT_HARD_LINKS
1102                 if (alt_dest_type == LINK_DEST
1103 #ifndef CAN_HARDLINK_SYMLINK
1104                  && !S_ISLNK(file->mode)
1105 #endif
1106 #ifndef CAN_HARDLINK_SPECIAL
1107                  && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
1108 #endif
1109                  && !S_ISDIR(file->mode)) {
1110                         if (do_link(cmpbuf, fname) < 0) {
1111                                 rsyserr(FERROR_XFER, errno,
1112                                         "failed to hard-link %s with %s",
1113                                         cmpbuf, fname);
1114                                 return j;
1115                         }
1116                         if (preserve_hard_links && F_IS_HLINKED(file))
1117                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1118                 } else
1119 #endif
1120                         match_level = 2;
1121                 if (itemizing && stdout_format_has_i
1122                  && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
1123                         int chg = alt_dest_type == COMPARE_DEST && ftype != FT_DIR ? 0
1124                             : ITEM_LOCAL_CHANGE + (match_level == 3 ? ITEM_XNAME_FOLLOWS : 0);
1125                         char *lp = match_level == 3 ? "" : NULL;
1126                         itemize(cmpbuf, file, ndx, 0, sxp, chg + ITEM_MATCHED, 0, lp);
1127                 }
1128                 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT) {
1129                         rprintf(FCLIENT, "%s%s is uptodate\n",
1130                                 fname, ftype == FT_DIR ? "/" : "");
1131                 }
1132                 return -2;
1133         }
1134
1135         return j;
1136 }
1137
1138 static void list_file_entry(struct file_struct *f)
1139 {
1140         char permbuf[PERMSTRING_SIZE];
1141         const char *mtime_str = timestring(f->modtime);
1142         int size_width = human_readable ? 14 : 11;
1143         int mtime_width = 1 + strlen(mtime_str);
1144         int atime_width = atimes_ndx ? mtime_width : 0;
1145         int crtime_width = crtimes_ndx ? mtime_width : 0;
1146
1147         if (!F_IS_ACTIVE(f)) {
1148                 /* this can happen if duplicate names were removed */
1149                 return;
1150         }
1151
1152         /* TODO: indicate '+' if the entry has an ACL. */
1153
1154         if (missing_args == 2 && f->mode == 0) {
1155                 rprintf(FINFO, "%-*s %s\n",
1156                         10 + 1 + size_width + mtime_width + atime_width + crtime_width, "*missing",
1157                         f_name(f, NULL));
1158         } else {
1159                 const char *atime_str = atimes_ndx && !S_ISDIR(f->mode) ? timestring(F_ATIME(f)) : "";
1160                 const char *crtime_str = crtimes_ndx ? timestring(F_CRTIME(f)) : "";
1161                 const char *arrow, *lnk;
1162
1163                 permstring(permbuf, f->mode);
1164
1165 #ifdef SUPPORT_LINKS
1166                 if (preserve_links && S_ISLNK(f->mode)) {
1167                         arrow = " -> ";
1168                         lnk = F_SYMLINK(f);
1169                 } else
1170 #endif
1171                         arrow = lnk = "";
1172
1173                 rprintf(FINFO, "%s %*s %s%*s%*s %s%s%s\n",
1174                         permbuf, size_width, human_num(F_LENGTH(f)),
1175                         timestring(f->modtime), atime_width, atime_str, crtime_width, crtime_str,
1176                         f_name(f, NULL), arrow, lnk);
1177         }
1178 }
1179
1180 static int phase = 0;
1181 static int dflt_perms;
1182
1183 static int implied_dirs_are_missing;
1184 /* Helper for recv_generator's skip_dir and dry_missing_dir tests. */
1185 static BOOL is_below(struct file_struct *file, struct file_struct *subtree)
1186 {
1187         return F_DEPTH(file) > F_DEPTH(subtree)
1188                 && (!implied_dirs_are_missing || f_name_has_prefix(file, subtree));
1189 }
1190
1191 /* Acts on the indicated item in cur_flist whose name is fname.  If a dir,
1192  * make sure it exists, and has the right permissions/timestamp info.  For
1193  * all other non-regular files (symlinks, etc.) we create them here.  For
1194  * regular files that have changed, we try to find a basis file and then
1195  * start sending checksums.  The ndx is the file's unique index value.
1196  *
1197  * The fname parameter must point to a MAXPATHLEN buffer!  (e.g it gets
1198  * passed to delete_item(), which can use it during a recursive delete.)
1199  *
1200  * Note that f_out is set to -1 when doing final directory-permission and
1201  * modification-time repair. */
1202 static void recv_generator(char *fname, struct file_struct *file, int ndx,
1203                            int itemizing, enum logcode code, int f_out)
1204 {
1205         static const char *parent_dirname = "";
1206         static struct file_struct *prior_dir_file = NULL;
1207         /* Missing dir not created due to --dry-run; will still be scanned. */
1208         static struct file_struct *dry_missing_dir = NULL;
1209         /* Missing dir whose contents are skipped altogether due to
1210          * --ignore-non-existing, daemon exclude, or mkdir failure. */
1211         static struct file_struct *skip_dir = NULL;
1212         static struct file_list *fuzzy_dirlist[MAX_BASIS_DIRS+1];
1213         static int need_fuzzy_dirlist = 0;
1214         struct file_struct *fuzzy_file = NULL;
1215         int fd = -1, f_copy = -1;
1216         stat_x sx, real_sx;
1217         STRUCT_STAT partial_st;
1218         struct file_struct *back_file = NULL;
1219         int statret, real_ret, stat_errno;
1220         char *fnamecmp, *partialptr, *backupptr = NULL;
1221         char fnamecmpbuf[MAXPATHLEN];
1222         uchar fnamecmp_type;
1223         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1224         enum filetype stype, ftype = get_file_type(file->mode);
1225         int is_dir = ftype != FT_DIR ? 0
1226                    : inc_recurse && ndx != cur_flist->ndx_start - 1 ? -1
1227                    : 1;
1228
1229         if (DEBUG_GTE(GENR, 1))
1230                 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
1231
1232         if (list_only) {
1233                 if (is_dir < 0
1234                  || (is_dir && !implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1235                         return;
1236                 list_file_entry(file);
1237                 return;
1238         }
1239
1240         maybe_ATTRS_ACCURATE_TIME = always_checksum ? ATTRS_ACCURATE_TIME : 0;
1241
1242         if (skip_dir) {
1243                 if (is_below(file, skip_dir)) {
1244                         if (is_dir)
1245                                 file->flags |= FLAG_MISSING_DIR;
1246 #ifdef SUPPORT_HARD_LINKS
1247                         else if (F_IS_HLINKED(file))
1248                                 handle_skipped_hlink(file, itemizing, code, f_out);
1249 #endif
1250                         return;
1251                 }
1252                 skip_dir = NULL;
1253         }
1254
1255         init_stat_x(&sx);
1256         if (daemon_filter_list.head && (*fname != '.' || fname[1])) {
1257                 if (check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
1258                         if (is_dir < 0)
1259                                 return;
1260 #ifdef SUPPORT_HARD_LINKS
1261                         if (F_IS_HLINKED(file))
1262                                 handle_skipped_hlink(file, itemizing, code, f_out);
1263 #endif
1264                         rprintf(FERROR_XFER,
1265                                 "ERROR: daemon refused to receive %s \"%s\"\n",
1266                                 is_dir ? "directory" : "file", fname);
1267                         if (is_dir)
1268                                 goto skipping_dir_contents;
1269                         return;
1270                 }
1271         }
1272
1273         if (dry_run > 1 || (dry_missing_dir && is_below(file, dry_missing_dir))) {
1274                 int i;
1275           parent_is_dry_missing:
1276                 for (i = 0; i < fuzzy_basis; i++) {
1277                         if (fuzzy_dirlist[i]) {
1278                                 flist_free(fuzzy_dirlist[i]);
1279                                 fuzzy_dirlist[i] = NULL;
1280                         }
1281                 }
1282                 parent_dirname = "";
1283                 statret = -1;
1284                 stat_errno = ENOENT;
1285         } else {
1286                 const char *dn = file->dirname ? file->dirname : ".";
1287                 dry_missing_dir = NULL;
1288                 if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
1289                         /* Each parent dir must be in the file list or the flist data is bad.
1290                          * Optimization: most of the time the parent dir will be the last dir
1291                          * this function was asked to process in the file list. */
1292                         if (!inc_recurse
1293                          && (*dn != '.' || dn[1]) /* Avoid an issue with --relative and the "." dir. */
1294                          && (!prior_dir_file || strcmp(dn, f_name(prior_dir_file, NULL)) != 0)) {
1295                                 int ok = 0, j = flist_find_name(cur_flist, dn, -1);
1296                                 if (j >= 0) {
1297                                         struct file_struct *f = cur_flist->sorted[j];
1298                                         if (S_ISDIR(f->mode) || (missing_args == 2 && !file->mode && !f->mode))
1299                                                 ok = 1;
1300                                 }
1301                                 /* The --delete-missing-args option can actually put invalid entries into
1302                                  * the file list, so if that option was specified, we'll just complain about
1303                                  * it and allow it. */
1304                                 if (!ok && missing_args == 2 && file->mode == 0 && j < 0)
1305                                         rprintf(FERROR, "WARNING: parent dir is absent in the file list: %s\n", dn);
1306                                 else if (!ok) {
1307                                         rprintf(FERROR, "ABORTING due to invalid path from sender: %s/%s\n",
1308                                                 dn, file->basename);
1309                                         exit_cleanup(RERR_PROTOCOL);
1310                                 }
1311                         }
1312                         if (relative_paths && !implied_dirs && file->mode != 0
1313                          && do_stat(dn, &sx.st) < 0) {
1314                                 if (dry_run)
1315                                         goto parent_is_dry_missing;
1316                                 if (make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0) {
1317                                         rsyserr(FERROR_XFER, errno,
1318                                                 "recv_generator: mkdir %s failed",
1319                                                 full_fname(dn));
1320                                 }
1321                         }
1322                         if (fuzzy_basis) {
1323                                 int i;
1324                                 for (i = 0; i < fuzzy_basis; i++) {
1325                                         if (fuzzy_dirlist[i]) {
1326                                                 flist_free(fuzzy_dirlist[i]);
1327                                                 fuzzy_dirlist[i] = NULL;
1328                                         }
1329                                 }
1330                                 need_fuzzy_dirlist = 1;
1331                         }
1332 #ifdef SUPPORT_ACLS
1333                         if (!preserve_perms)
1334                                 dflt_perms = default_perms_for_dir(dn);
1335 #endif
1336                 }
1337                 parent_dirname = dn;
1338
1339                 statret = link_stat(fname, &sx.st, keep_dirlinks && is_dir);
1340                 stat_errno = errno;
1341         }
1342
1343         if (missing_args == 2 && file->mode == 0) {
1344                 if (filter_list.head && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
1345                         return;
1346                 if (statret == 0)
1347                         delete_item(fname, sx.st.st_mode, del_opts);
1348                 return;
1349         }
1350
1351         if (ignore_non_existing > 0 && statret == -1 && stat_errno == ENOENT) {
1352                 if (is_dir) {
1353                         if (is_dir < 0)
1354                                 return;
1355                         skip_dir = file;
1356                         file->flags |= FLAG_MISSING_DIR;
1357                 }
1358 #ifdef SUPPORT_HARD_LINKS
1359                 else if (F_IS_HLINKED(file))
1360                         handle_skipped_hlink(file, itemizing, code, f_out);
1361 #endif
1362                 if (INFO_GTE(SKIP, 1)) {
1363                         rprintf(FINFO, "not creating new %s \"%s\"\n",
1364                                 is_dir ? "directory" : "file", fname);
1365                 }
1366                 return;
1367         }
1368
1369         if (statret == 0 && !(sx.st.st_mode & S_IWUSR)
1370          && !am_root && sx.st.st_uid == our_uid)
1371                 del_opts |= DEL_NO_UID_WRITE;
1372
1373         if (statret == 0)
1374                 stype = get_file_type(sx.st.st_mode);
1375         else
1376                 stype = FT_UNSUPPORTED;
1377
1378         if (ignore_existing > 0 && statret == 0
1379          && (!is_dir || stype != FT_DIR)) {
1380                 if (INFO_GTE(SKIP, 1) && is_dir >= 0) {
1381                         const char *suf = "";
1382                         if (INFO_GTE(SKIP, 2)) {
1383                                 if (ftype != stype)
1384                                         suf = " (type change)";
1385                                 else if (!quick_check_ok(ftype, fname, file, &sx.st))
1386                                         suf = always_checksum ? " (sum change)" : " (file change)";
1387                                 else if (!unchanged_attrs(fname, file, &sx))
1388                                         suf = " (attr change)";
1389                                 else
1390                                         suf = " (uptodate)";
1391                         }
1392                         rprintf(FINFO, "%s exists%s\n", fname, suf);
1393                 }
1394 #ifdef SUPPORT_HARD_LINKS
1395                 if (F_IS_HLINKED(file))
1396                         handle_skipped_hlink(file, itemizing, code, f_out);
1397 #endif
1398                 goto cleanup;
1399         }
1400
1401         fnamecmp = fname;
1402
1403         if (is_dir) {
1404                 mode_t added_perms;
1405                 if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
1406                         goto cleanup;
1407                 if (am_root < 0) {
1408                         /* For --fake-super, the dir must be useable by the copying
1409                          * user, just like it would be for root. */
1410                         added_perms = S_IRUSR|S_IWUSR|S_IXUSR;
1411                 } else
1412                         added_perms = 0;
1413                 if (is_dir < 0) {
1414                         if (!(preserve_times & PRESERVE_DIR_TIMES))
1415                                 goto cleanup;
1416                         /* In inc_recurse mode we want to make sure any missing
1417                          * directories get created while we're still processing
1418                          * the parent dir (which allows us to touch the parent
1419                          * dir's mtime right away).  We will handle the dir in
1420                          * full later (right before we handle its contents). */
1421                         if (statret == 0
1422                          && (stype == FT_DIR
1423                           || delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0))
1424                                 goto cleanup; /* Any errors get reported later. */
1425                         if (do_mkdir(fname, (file->mode|added_perms) & 0700) == 0)
1426                                 file->flags |= FLAG_DIR_CREATED;
1427                         goto cleanup;
1428                 }
1429                 /* The file to be received is a directory, so we need
1430                  * to prepare appropriately.  If there is already a
1431                  * file of that name and it is *not* a directory, then
1432                  * we need to delete it.  If it doesn't exist, then
1433                  * (perhaps recursively) create it. */
1434                 if (statret == 0 && stype != FT_DIR) {
1435                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0)
1436                                 goto skipping_dir_contents;
1437                         statret = -1;
1438                 }
1439                 if (dry_run && statret != 0) {
1440                         if (!dry_missing_dir)
1441                                 dry_missing_dir = file;
1442                         file->flags |= FLAG_MISSING_DIR;
1443                 }
1444                 init_stat_x(&real_sx);
1445                 real_sx.st = sx.st;
1446                 real_ret = statret;
1447                 if (file->flags & FLAG_DIR_CREATED)
1448                         statret = -1;
1449                 if (!preserve_perms) { /* See comment in non-dir code below. */
1450                         file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms, statret == 0);
1451                 }
1452                 if (statret != 0 && basis_dir[0] != NULL) {
1453                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx, itemizing, code);
1454                         if (j == -2) {
1455                                 itemizing = 0;
1456                                 code = FNONE;
1457                                 statret = 1;
1458                         } else if (j >= 0) {
1459                                 statret = 1;
1460                                 fnamecmp = fnamecmpbuf;
1461                         }
1462                 }
1463                 if (itemizing && f_out != -1) {
1464                         itemize(fnamecmp, file, ndx, statret, &sx,
1465                                 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
1466                 }
1467                 if (real_ret != 0 && do_mkdir(fname,file->mode|added_perms) < 0 && errno != EEXIST) {
1468                         if (!relative_paths || errno != ENOENT
1469                          || make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0
1470                          || (do_mkdir(fname, file->mode|added_perms) < 0 && errno != EEXIST)) {
1471                                 rsyserr(FERROR_XFER, errno,
1472                                         "recv_generator: mkdir %s failed",
1473                                         full_fname(fname));
1474                           skipping_dir_contents:
1475                                 rprintf(FERROR, "*** Skipping any contents from this failed directory ***\n");
1476                                 skip_dir = file;
1477                                 file->flags |= FLAG_MISSING_DIR;
1478                                 goto cleanup;
1479                         }
1480                 }
1481
1482 #ifdef SUPPORT_XATTRS
1483                 if (preserve_xattrs && statret == 1)
1484                         copy_xattrs(fnamecmpbuf, fname);
1485 #endif
1486                 if (set_file_attrs(fname, file, real_ret ? NULL : &real_sx, NULL, 0)
1487                  && INFO_GTE(NAME, 1) && code != FNONE && f_out != -1)
1488                         rprintf(code, "%s/\n", fname);
1489
1490                 /* We need to ensure that the dirs in the transfer have both
1491                  * readable and writable permissions during the time we are
1492                  * putting files within them.  This is then restored to the
1493                  * former permissions after the transfer is done. */
1494 #ifdef HAVE_CHMOD
1495                 if (!am_root && (file->mode & S_IRWXU) != S_IRWXU && dir_tweaking) {
1496                         mode_t mode = file->mode | S_IRWXU;
1497                         if (do_chmod(fname, mode) < 0) {
1498                                 rsyserr(FERROR_XFER, errno,
1499                                         "failed to modify permissions on %s",
1500                                         full_fname(fname));
1501                         }
1502                         need_retouch_dir_perms = 1;
1503                 }
1504 #endif
1505
1506                 if (real_ret != 0 && one_file_system)
1507                         real_sx.st.st_dev = filesystem_dev;
1508                 if (inc_recurse) {
1509                         if (one_file_system) {
1510                                 uint32 *devp = F_DIR_DEV_P(file);
1511                                 DEV_MAJOR(devp) = major(real_sx.st.st_dev);
1512                                 DEV_MINOR(devp) = minor(real_sx.st.st_dev);
1513                         }
1514                 }
1515                 else if (delete_during && f_out != -1 && !phase
1516                     && !(file->flags & FLAG_MISSING_DIR)) {
1517                         if (file->flags & FLAG_CONTENT_DIR)
1518                                 delete_in_dir(fname, file, real_sx.st.st_dev);
1519                         else
1520                                 change_local_filter_dir(fname, strlen(fname), F_DEPTH(file));
1521                 }
1522                 prior_dir_file = file;
1523                 goto cleanup;
1524         }
1525
1526         /* If we're not preserving permissions, change the file-list's
1527          * mode based on the local permissions and some heuristics. */
1528         if (!preserve_perms) {
1529                 int exists = statret == 0 && stype != FT_DIR;
1530                 file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms, exists);
1531         }
1532
1533 #ifdef SUPPORT_HARD_LINKS
1534         if (preserve_hard_links && F_HLINK_NOT_FIRST(file)
1535          && hard_link_check(file, ndx, fname, statret, &sx, itemizing, code))
1536                 goto cleanup;
1537 #endif
1538
1539         if (preserve_links && ftype == FT_SYMLINK) {
1540 #ifdef SUPPORT_LINKS
1541                 const char *sl = F_SYMLINK(file);
1542                 if (safe_symlinks && unsafe_symlink(sl, fname)) {
1543                         if (INFO_GTE(NAME, 1)) {
1544                                 if (solo_file) {
1545                                         /* fname contains the destination path, but we
1546                                          * want to report the source path. */
1547                                         fname = f_name(file, NULL);
1548                                 }
1549                                 rprintf(FINFO,
1550                                         "ignoring unsafe symlink \"%s\" -> \"%s\"\n",
1551                                         fname, sl);
1552                         }
1553                         goto cleanup;
1554                 }
1555                 if (statret == 0) {
1556                         if (stype == FT_SYMLINK && quick_check_ok(stype, fname, file, &sx.st)) {
1557                                 /* The link is pointing to the right place. */
1558                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1559                                 if (itemizing)
1560                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1561 #ifdef SUPPORT_HARD_LINKS
1562                                 if (preserve_hard_links && F_IS_HLINKED(file))
1563                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1564 #endif
1565                                 if (remove_source_files == 1)
1566                                         goto return_with_success;
1567                                 goto cleanup;
1568                         }
1569                 } else if (basis_dir[0] != NULL) {
1570                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx, itemizing, code);
1571                         if (j == -2) {
1572 #ifndef CAN_HARDLINK_SYMLINK
1573                                 if (alt_dest_type == LINK_DEST) {
1574                                         /* Resort to --copy-dest behavior. */
1575                                 } else
1576 #endif
1577                                 if (alt_dest_type != COPY_DEST)
1578                                         goto cleanup;
1579                                 itemizing = 0;
1580                                 code = FNONE;
1581                         } else if (j >= 0) {
1582                                 statret = 1;
1583                                 fnamecmp = fnamecmpbuf;
1584                         }
1585                 }
1586                 if (atomic_create(file, fname, sl, NULL, MAKEDEV(0, 0), &sx, statret == 0 ? DEL_FOR_SYMLINK : 0)) {
1587                         set_file_attrs(fname, file, NULL, NULL, 0);
1588                         if (itemizing) {
1589                                 if (statret == 0 && stype != FT_SYMLINK)
1590                                         statret = -1;
1591                                 itemize(fnamecmp, file, ndx, statret, &sx,
1592                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1593                         }
1594                         if (code != FNONE && INFO_GTE(NAME, 1))
1595                                 rprintf(code, "%s -> %s\n", fname, sl);
1596 #ifdef SUPPORT_HARD_LINKS
1597                         if (preserve_hard_links && F_IS_HLINKED(file))
1598                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1599 #endif
1600                         /* This does not check remove_source_files == 1
1601                          * because this is one of the items that the old
1602                          * --remove-sent-files option would remove. */
1603                         if (remove_source_files)
1604                                 goto return_with_success;
1605                 }
1606 #endif
1607                 goto cleanup;
1608         }
1609
1610         if ((am_root && preserve_devices && ftype == FT_DEVICE)
1611          || (preserve_specials && ftype == FT_SPECIAL)) {
1612                 dev_t rdev;
1613                 int del_for_flag;
1614                 if (ftype == FT_DEVICE) {
1615                         uint32 *devp = F_RDEV_P(file);
1616                         rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
1617                         del_for_flag = DEL_FOR_DEVICE;
1618                 } else {
1619                         rdev = 0;
1620                         del_for_flag = DEL_FOR_SPECIAL;
1621                 }
1622                 if (statret == 0) {
1623                         if (ftype != stype)
1624                                 statret = -1;
1625                         else if (quick_check_ok(ftype, fname, file, &sx.st)) {
1626                                 /* The device or special file is identical. */
1627                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1628                                 if (itemizing)
1629                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1630 #ifdef SUPPORT_HARD_LINKS
1631                                 if (preserve_hard_links && F_IS_HLINKED(file))
1632                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1633 #endif
1634                                 if (remove_source_files == 1)
1635                                         goto return_with_success;
1636                                 goto cleanup;
1637                         }
1638                 } else if (basis_dir[0] != NULL) {
1639                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx, itemizing, code);
1640                         if (j == -2) {
1641 #ifndef CAN_HARDLINK_SPECIAL
1642                                 if (alt_dest_type == LINK_DEST) {
1643                                         /* Resort to --copy-dest behavior. */
1644                                 } else
1645 #endif
1646                                 if (alt_dest_type != COPY_DEST)
1647                                         goto cleanup;
1648                                 itemizing = 0;
1649                                 code = FNONE;
1650                         } else if (j >= 0) {
1651                                 statret = 1;
1652                                 fnamecmp = fnamecmpbuf;
1653                         }
1654                 }
1655                 if (DEBUG_GTE(GENR, 1)) {
1656                         rprintf(FINFO, "mknod(%s, 0%o, [%ld,%ld])\n",
1657                                 fname, (int)file->mode,
1658                                 (long)major(rdev), (long)minor(rdev));
1659                 }
1660                 if (atomic_create(file, fname, NULL, NULL, rdev, &sx, del_for_flag)) {
1661                         set_file_attrs(fname, file, NULL, NULL, 0);
1662                         if (itemizing) {
1663                                 itemize(fnamecmp, file, ndx, statret, &sx,
1664                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1665                         }
1666                         if (code != FNONE && INFO_GTE(NAME, 1))
1667                                 rprintf(code, "%s\n", fname);
1668 #ifdef SUPPORT_HARD_LINKS
1669                         if (preserve_hard_links && F_IS_HLINKED(file))
1670                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1671 #endif
1672                         if (remove_source_files == 1)
1673                                 goto return_with_success;
1674                 }
1675                 goto cleanup;
1676         }
1677
1678         if (ftype != FT_REG) {
1679                 if (solo_file)
1680                         fname = f_name(file, NULL);
1681                 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1682                 goto cleanup;
1683         }
1684
1685         if (max_size >= 0 && F_LENGTH(file) > max_size) {
1686                 if (INFO_GTE(SKIP, 1)) {
1687                         if (solo_file)
1688                                 fname = f_name(file, NULL);
1689                         rprintf(FINFO, "%s is over max-size\n", fname);
1690                 }
1691                 goto cleanup;
1692         }
1693         if (min_size >= 0 && F_LENGTH(file) < min_size) {
1694                 if (INFO_GTE(SKIP, 1)) {
1695                         if (solo_file)
1696                                 fname = f_name(file, NULL);
1697                         rprintf(FINFO, "%s is under min-size\n", fname);
1698                 }
1699                 goto cleanup;
1700         }
1701
1702         if (update_only > 0 && statret == 0 && file->modtime - sx.st.st_mtime < modify_window) {
1703                 if (INFO_GTE(SKIP, 1))
1704                         rprintf(FINFO, "%s is newer\n", fname);
1705 #ifdef SUPPORT_HARD_LINKS
1706                 if (F_IS_HLINKED(file))
1707                         handle_skipped_hlink(file, itemizing, code, f_out);
1708 #endif
1709                 goto cleanup;
1710         }
1711
1712         fnamecmp_type = FNAMECMP_FNAME;
1713
1714         if (statret == 0 && !(stype == FT_REG || (write_devices && stype == FT_DEVICE))) {
1715                 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_FILE) != 0)
1716                         goto cleanup;
1717                 statret = -1;
1718                 stat_errno = ENOENT;
1719         }
1720
1721         if (basis_dir[0] != NULL && (statret != 0 || alt_dest_type != COPY_DEST)) {
1722                 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &sx, statret == 0, itemizing, code);
1723                 if (j == -2) {
1724                         if (remove_source_files == 1)
1725                                 goto return_with_success;
1726                         goto cleanup;
1727                 }
1728                 if (j >= 0) {
1729                         fnamecmp = fnamecmpbuf;
1730                         fnamecmp_type = j;
1731                         statret = 0;
1732                 }
1733         }
1734
1735         init_stat_x(&real_sx);
1736         real_sx.st = sx.st; /* Don't copy xattr/acl pointers, as they would free wrong. */
1737         real_ret = statret;
1738
1739         if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1740          && link_stat(partialptr, &partial_st, 0) == 0
1741          && S_ISREG(partial_st.st_mode)) {
1742                 if (statret != 0)
1743                         goto prepare_to_open;
1744         } else
1745                 partialptr = NULL;
1746
1747         if (statret != 0 && fuzzy_basis) {
1748                 if (need_fuzzy_dirlist) {
1749                         const char *dn = file->dirname ? file->dirname : ".";
1750                         int i;
1751                         strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf);
1752                         for (i = 0; i < fuzzy_basis; i++) {
1753                                 if (i && pathjoin(fnamecmpbuf, MAXPATHLEN, basis_dir[i-1], dn) >= MAXPATHLEN)
1754                                         continue;
1755                                 fuzzy_dirlist[i] = get_dirlist(fnamecmpbuf, -1, GDL_IGNORE_FILTER_RULES | GDL_PERHAPS_DIR);
1756                                 if (fuzzy_dirlist[i] && fuzzy_dirlist[i]->used == 0) {
1757                                         flist_free(fuzzy_dirlist[i]);
1758                                         fuzzy_dirlist[i] = NULL;
1759                                 }
1760                         }
1761                         need_fuzzy_dirlist = 0;
1762                 }
1763
1764                 /* Sets fnamecmp_type to FNAMECMP_FUZZY or above. */
1765                 fuzzy_file = find_fuzzy(file, fuzzy_dirlist, &fnamecmp_type);
1766                 if (fuzzy_file) {
1767                         f_name(fuzzy_file, fnamecmpbuf);
1768                         if (DEBUG_GTE(FUZZY, 1)) {
1769                                 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1770                                         fname, fnamecmpbuf);
1771                         }
1772                         sx.st.st_size = F_LENGTH(fuzzy_file);
1773                         statret = 0;
1774                         fnamecmp = fnamecmpbuf;
1775                 }
1776         }
1777
1778         if (statret != 0) {
1779 #ifdef SUPPORT_HARD_LINKS
1780                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1781                         cur_flist->in_progress++;
1782                         goto cleanup;
1783                 }
1784 #endif
1785                 if (stat_errno == ENOENT)
1786                         goto notify_others;
1787                 rsyserr(FERROR_XFER, stat_errno, "recv_generator: failed to stat %s",
1788                         full_fname(fname));
1789                 goto cleanup;
1790         }
1791
1792         if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1793                 ;
1794         else if (fnamecmp_type >= FNAMECMP_FUZZY)
1795                 ;
1796         else if (quick_check_ok(FT_REG, fnamecmp, file, &sx.st)) {
1797                 if (partialptr) {
1798                         do_unlink(partialptr);
1799                         handle_partial_dir(partialptr, PDIR_DELETE);
1800                 }
1801                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT | maybe_ATTRS_ACCURATE_TIME);
1802                 if (itemizing)
1803                         itemize(fnamecmp, file, ndx, statret, &sx, 0, 0, NULL);
1804 #ifdef SUPPORT_HARD_LINKS
1805                 if (preserve_hard_links && F_IS_HLINKED(file))
1806                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1807 #endif
1808                 if (remove_source_files != 1)
1809                         goto cleanup;
1810           return_with_success:
1811                 if (!dry_run)
1812                         send_msg_int(MSG_SUCCESS, ndx);
1813                 goto cleanup;
1814         }
1815
1816         if (append_mode > 0 && sx.st.st_size >= F_LENGTH(file)) {
1817 #ifdef SUPPORT_HARD_LINKS
1818                 if (F_IS_HLINKED(file))
1819                         handle_skipped_hlink(file, itemizing, code, f_out);
1820 #endif
1821                 goto cleanup;
1822         }
1823
1824   prepare_to_open:
1825         if (partialptr) {
1826                 sx.st = partial_st;
1827                 fnamecmp = partialptr;
1828                 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1829                 statret = 0;
1830         }
1831
1832         if (!do_xfers)
1833                 goto notify_others;
1834
1835         if (read_batch || whole_file) {
1836                 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1837                         if (!(backupptr = get_backup_name(fname)))
1838                                 goto cleanup;
1839                         if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
1840                                 goto pretend_missing;
1841                         if (copy_file(fname, backupptr, -1, back_file->mode) < 0) {
1842                                 unmake_file(back_file);
1843                                 back_file = NULL;
1844                                 goto cleanup;
1845                         }
1846                 }
1847                 goto notify_others;
1848         }
1849
1850         if (fuzzy_dirlist[0]) {
1851                 int j = flist_find(fuzzy_dirlist[0], file);
1852                 if (j >= 0) /* don't use changing file as future fuzzy basis */
1853                         fuzzy_dirlist[0]->files[j]->flags |= FLAG_FILE_SENT;
1854         }
1855
1856         /* open the file */
1857         if ((fd = do_open(fnamecmp, O_RDONLY, 0)) < 0) {
1858                 rsyserr(FERROR, errno, "failed to open %s, continuing",
1859                         full_fname(fnamecmp));
1860           pretend_missing:
1861                 /* pretend the file didn't exist */
1862 #ifdef SUPPORT_HARD_LINKS
1863                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1864                         cur_flist->in_progress++;
1865                         goto cleanup;
1866                 }
1867 #endif
1868                 statret = real_ret = -1;
1869                 goto notify_others;
1870         }
1871
1872         if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1873                 if (!(backupptr = get_backup_name(fname))) {
1874                         close(fd);
1875                         goto cleanup;
1876                 }
1877                 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1878                         close(fd);
1879                         goto pretend_missing;
1880                 }
1881                 if (robust_unlink(backupptr) && errno != ENOENT) {
1882                         rsyserr(FERROR_XFER, errno, "unlink %s",
1883                                 full_fname(backupptr));
1884                         unmake_file(back_file);
1885                         back_file = NULL;
1886                         close(fd);
1887                         goto cleanup;
1888                 }
1889                 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1890                         rsyserr(FERROR_XFER, errno, "open %s", full_fname(backupptr));
1891                         unmake_file(back_file);
1892                         back_file = NULL;
1893                         close(fd);
1894                         goto cleanup;
1895                 }
1896                 fnamecmp_type = FNAMECMP_BACKUP;
1897         }
1898
1899         if (DEBUG_GTE(DELTASUM, 3)) {
1900                 rprintf(FINFO, "gen mapped %s of size %s\n",
1901                         fnamecmp, big_num(sx.st.st_size));
1902         }
1903
1904         if (DEBUG_GTE(DELTASUM, 2))
1905                 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1906
1907   notify_others:
1908         if (remove_source_files && !delay_updates && !phase && !dry_run)
1909                 increment_active_files(ndx, itemizing, code);
1910         if (inc_recurse && (!dry_run || write_batch < 0))
1911                 cur_flist->in_progress++;
1912 #ifdef SUPPORT_HARD_LINKS
1913         if (preserve_hard_links && F_IS_HLINKED(file))
1914                 file->flags |= FLAG_FILE_SENT;
1915 #endif
1916         write_ndx(f_out, ndx);
1917         if (itemizing) {
1918                 int iflags = ITEM_TRANSFER;
1919                 if (always_checksum > 0)
1920                         iflags |= ITEM_REPORT_CHANGE;
1921                 if (fnamecmp_type != FNAMECMP_FNAME)
1922                         iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1923                 if (fnamecmp_type >= FNAMECMP_FUZZY)
1924                         iflags |= ITEM_XNAME_FOLLOWS;
1925                 itemize(fnamecmp, file, -1, real_ret, &real_sx, iflags, fnamecmp_type,
1926                         fuzzy_file ? fuzzy_file->basename : NULL);
1927                 free_stat_x(&real_sx);
1928         }
1929
1930         if (!do_xfers) {
1931 #ifdef SUPPORT_HARD_LINKS
1932                 if (preserve_hard_links && F_IS_HLINKED(file))
1933                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1934 #endif
1935                 goto cleanup;
1936         }
1937         if (read_batch)
1938                 goto cleanup;
1939
1940         if (statret != 0 || whole_file)
1941                 write_sum_head(f_out, NULL);
1942         else if (sx.st.st_size <= 0) {
1943                 write_sum_head(f_out, NULL);
1944                 close(fd);
1945         } else {
1946                 if (generate_and_send_sums(fd, sx.st.st_size, f_out, f_copy) < 0) {
1947                         rprintf(FWARNING,
1948                                 "WARNING: file is too large for checksum sending: %s\n",
1949                                 fnamecmp);
1950                         write_sum_head(f_out, NULL);
1951                 }
1952                 close(fd);
1953         }
1954
1955   cleanup:
1956         if (back_file) {
1957                 int save_preserve_xattrs = preserve_xattrs;
1958                 if (f_copy >= 0)
1959                         close(f_copy);
1960 #ifdef SUPPORT_XATTRS
1961                 if (preserve_xattrs) {
1962                         copy_xattrs(fname, backupptr);
1963                         preserve_xattrs = 0;
1964                 }
1965 #endif
1966                 set_file_attrs(backupptr, back_file, NULL, NULL, 0);
1967                 preserve_xattrs = save_preserve_xattrs;
1968                 if (INFO_GTE(BACKUP, 1)) {
1969                         rprintf(FINFO, "backed up %s to %s\n",
1970                                 fname, backupptr);
1971                 }
1972                 unmake_file(back_file);
1973         }
1974
1975         free_stat_x(&sx);
1976 }
1977
1978 /* If we are replacing an existing hard link, symlink, device, or special file,
1979  * create a temp-name item and rename it into place.  A symlimk specifies slnk,
1980  * a hard link specifies hlnk, otherwise we create a device based on rdev.
1981  * Specify 0 for the del_for_flag if there is not a file to replace.  This
1982  * returns 1 on success and 0 on failure. */
1983 int atomic_create(struct file_struct *file, char *fname, const char *slnk, const char *hlnk,
1984                   dev_t rdev, stat_x *sxp, int del_for_flag)
1985 {
1986         char tmpname[MAXPATHLEN];
1987         const char *create_name;
1988         int skip_atomic, dir_in_the_way = del_for_flag && S_ISDIR(sxp->st.st_mode);
1989
1990         if (!del_for_flag || dir_in_the_way || tmpdir || !get_tmpname(tmpname, fname, True))
1991                 skip_atomic = 1;
1992         else
1993                 skip_atomic = 0;
1994
1995         if (del_for_flag) {
1996                 if (make_backups > 0 && !dir_in_the_way) {
1997                         if (!make_backup(fname, skip_atomic))
1998                                 return 0;
1999                 } else if (skip_atomic) {
2000                         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
2001                         if (delete_item(fname, sxp->st.st_mode, del_opts | del_for_flag) != 0)
2002                                 return 0;
2003                 }
2004         }
2005
2006         create_name = skip_atomic ? fname : tmpname;
2007
2008         if (slnk) {
2009 #ifdef SUPPORT_LINKS
2010                 if (do_symlink(slnk, create_name) < 0) {
2011                         rsyserr(FERROR_XFER, errno, "symlink %s -> \"%s\" failed",
2012                                 full_fname(create_name), slnk);
2013                         return 0;
2014                 }
2015 #else
2016                 return 0;
2017 #endif
2018         } else if (hlnk) {
2019 #ifdef SUPPORT_HARD_LINKS
2020                 if (!hard_link_one(file, create_name, hlnk, 0))
2021                         return 0;
2022 #else
2023                 return 0;
2024 #endif
2025         } else {
2026                 if (do_mknod(create_name, file->mode, rdev) < 0) {
2027                         rsyserr(FERROR_XFER, errno, "mknod %s failed",
2028                                 full_fname(create_name));
2029                         return 0;
2030                 }
2031         }
2032
2033         if (!skip_atomic) {
2034                 if (do_rename(tmpname, fname) < 0) {
2035                         rsyserr(FERROR_XFER, errno, "rename %s -> \"%s\" failed",
2036                                 full_fname(tmpname), full_fname(fname));
2037                         do_unlink(tmpname);
2038                         return 0;
2039                 }
2040         }
2041
2042         return 1;
2043 }
2044
2045 #ifdef SUPPORT_HARD_LINKS
2046 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
2047                                  enum logcode code, int f_out)
2048 {
2049         char fbuf[MAXPATHLEN];
2050         int new_last_ndx;
2051         struct file_list *save_flist = cur_flist;
2052
2053         /* If we skip the last item in a chain of links and there was a
2054          * prior non-skipped hard-link waiting to finish, finish it now. */
2055         if ((new_last_ndx = skip_hard_link(file, &cur_flist)) < 0)
2056                 return;
2057
2058         file = cur_flist->files[new_last_ndx - cur_flist->ndx_start];
2059         cur_flist->in_progress--; /* undo prior increment */
2060         f_name(file, fbuf);
2061         recv_generator(fbuf, file, new_last_ndx, itemizing, code, f_out);
2062
2063         cur_flist = save_flist;
2064 }
2065 #endif
2066
2067 static void touch_up_dirs(struct file_list *flist, int ndx)
2068 {
2069         static int counter = 0;
2070         struct file_struct *file;
2071         char *fname;
2072         BOOL fix_dir_perms;
2073         int i, start, end;
2074
2075         if (ndx < 0) {
2076                 start = 0;
2077                 end = flist->used - 1;
2078         } else
2079                 start = end = ndx;
2080
2081         /* Fix any directory permissions that were modified during the
2082          * transfer and/or re-set any tweaked modified-time values. */
2083         for (i = start; i <= end; i++, counter++) {
2084                 file = flist->files[i];
2085                 if (!F_IS_ACTIVE(file))
2086                         continue;
2087                 if (!S_ISDIR(file->mode)
2088                  || (!implied_dirs && file->flags & FLAG_IMPLIED_DIR))
2089                         continue;
2090                 if (DEBUG_GTE(TIME, 2)) {
2091                         fname = f_name(file, NULL);
2092                         rprintf(FINFO, "touch_up_dirs: %s (%d)\n",
2093                                 NS(fname), i);
2094                 }
2095                 /* Be sure not to retouch permissions with --fake-super. */
2096                 fix_dir_perms = !am_root && !(file->mode & S_IWUSR);
2097                 if (file->flags & FLAG_MISSING_DIR || !(need_retouch_dir_times || fix_dir_perms))
2098                         continue;
2099                 fname = f_name(file, NULL);
2100                 if (fix_dir_perms)
2101                         do_chmod(fname, file->mode);
2102                 if (need_retouch_dir_times) {
2103                         STRUCT_STAT st;
2104                         if (link_stat(fname, &st, 0) == 0 && mtime_differs(&st, file)) {
2105                                 st.st_mtime = file->modtime;
2106 #ifdef ST_MTIME_NSEC
2107                                 st.ST_MTIME_NSEC = F_MOD_NSEC_or_0(file);
2108 #endif
2109                                 set_times(fname, &st);
2110                         }
2111                 }
2112                 if (counter >= loopchk_limit) {
2113                         if (allowed_lull)
2114                                 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
2115                         else
2116                                 maybe_flush_socket(0);
2117                         counter = 0;
2118                 }
2119         }
2120 }
2121
2122 void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
2123 {
2124         struct file_struct *file;
2125         struct file_list *flist;
2126         char fbuf[MAXPATHLEN];
2127         int ndx;
2128
2129         while (1) {
2130 #ifdef SUPPORT_HARD_LINKS
2131                 if (preserve_hard_links && (ndx = get_hlink_num()) != -1) {
2132                         int send_failed = (ndx == -2);
2133                         if (send_failed)
2134                                 ndx = get_hlink_num();
2135                         flist = flist_for_ndx(ndx, "check_for_finished_files.1");
2136                         file = flist->files[ndx - flist->ndx_start];
2137                         assert(file->flags & FLAG_HLINKED);
2138                         if (send_failed)
2139                                 handle_skipped_hlink(file, itemizing, code, sock_f_out);
2140                         else
2141                                 finish_hard_link(file, f_name(file, fbuf), ndx, NULL, itemizing, code, -1);
2142                         flist->in_progress--;
2143                         continue;
2144                 }
2145 #endif
2146
2147                 if (check_redo && (ndx = get_redo_num()) != -1) {
2148                         OFF_T save_max_size = max_size;
2149                         OFF_T save_min_size = min_size;
2150                         csum_length = SUM_LENGTH;
2151                         max_size = -1;
2152                         min_size = -1;
2153                         ignore_existing = -ignore_existing;
2154                         ignore_non_existing = -ignore_non_existing;
2155                         update_only = -update_only;
2156                         always_checksum = -always_checksum;
2157                         size_only = -size_only;
2158                         append_mode = -append_mode;
2159                         make_backups = -make_backups; /* avoid dup backup w/inplace */
2160                         ignore_times++;
2161
2162                         flist = cur_flist;
2163                         cur_flist = flist_for_ndx(ndx, "check_for_finished_files.2");
2164
2165                         file = cur_flist->files[ndx - cur_flist->ndx_start];
2166                         if (solo_file)
2167                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2168                         else
2169                                 f_name(file, fbuf);
2170                         recv_generator(fbuf, file, ndx, itemizing, code, sock_f_out);
2171                         cur_flist->to_redo--;
2172
2173                         cur_flist = flist;
2174
2175                         csum_length = SHORT_SUM_LENGTH;
2176                         max_size = save_max_size;
2177                         min_size = save_min_size;
2178                         ignore_existing = -ignore_existing;
2179                         ignore_non_existing = -ignore_non_existing;
2180                         update_only = -update_only;
2181                         always_checksum = -always_checksum;
2182                         size_only = -size_only;
2183                         append_mode = -append_mode;
2184                         make_backups = -make_backups;
2185                         ignore_times--;
2186                         continue;
2187                 }
2188
2189                 if (cur_flist == first_flist)
2190                         break;
2191
2192                 /* We only get here if inc_recurse is enabled. */
2193                 if (first_flist->in_progress || first_flist->to_redo)
2194                         break;
2195
2196                 write_ndx(sock_f_out, NDX_DONE);
2197                 if (!read_batch && !flist_eof) {
2198                         int old_total = 0;
2199                         for (flist = first_flist; flist != cur_flist; flist = flist->next)
2200                                 old_total += flist->used;
2201                         maybe_flush_socket(!flist_eof && file_total - old_total < MIN_FILECNT_LOOKAHEAD/2);
2202                 }
2203
2204                 if (delete_during == 2 || !dir_tweaking) {
2205                         /* Skip directory touch-up. */
2206                 } else if (first_flist->parent_ndx >= 0)
2207                         touch_up_dirs(dir_flist, first_flist->parent_ndx);
2208
2209                 flist_free(first_flist); /* updates first_flist */
2210         }
2211 }
2212
2213 void generate_files(int f_out, const char *local_name)
2214 {
2215         int i, ndx, next_loopchk = 0;
2216         char fbuf[MAXPATHLEN];
2217         int itemizing;
2218         enum logcode code;
2219         int save_info_flist = info_levels[INFO_FLIST];
2220         int save_info_progress = info_levels[INFO_PROGRESS];
2221
2222         if (protocol_version >= 29) {
2223                 itemizing = 1;
2224                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2225                 code = logfile_format_has_i ? FNONE : FLOG;
2226         } else if (am_daemon) {
2227                 itemizing = logfile_format_has_i && do_xfers;
2228                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2229                 code = itemizing || !do_xfers ? FCLIENT : FINFO;
2230         } else if (!am_server) {
2231                 itemizing = stdout_format_has_i;
2232                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2233                 code = itemizing ? FNONE : FINFO;
2234         } else {
2235                 itemizing = 0;
2236                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2237                 code = FINFO;
2238         }
2239         solo_file = local_name;
2240         dir_tweaking = !(list_only || solo_file || dry_run);
2241         need_retouch_dir_times = preserve_times & PRESERVE_DIR_TIMES;
2242         loopchk_limit = allowed_lull ? allowed_lull * 5 : 200;
2243         symlink_timeset_failed_flags = ITEM_REPORT_TIME
2244             | (protocol_version >= 30 || !am_server ? ITEM_REPORT_TIMEFAIL : 0);
2245         implied_dirs_are_missing = relative_paths && !implied_dirs && protocol_version < 30;
2246
2247         if (DEBUG_GTE(GENR, 1))
2248                 rprintf(FINFO, "generator starting pid=%d\n", (int)getpid());
2249
2250         if (delete_before && !solo_file && cur_flist->used > 0)
2251                 do_delete_pass();
2252         if (delete_during == 2) {
2253                 deldelay_size = BIGPATHBUFLEN * 4;
2254                 deldelay_buf = new_array(char, deldelay_size);
2255         }
2256         info_levels[INFO_FLIST] = info_levels[INFO_PROGRESS] = 0;
2257
2258         if (append_mode > 0 || whole_file < 0)
2259                 whole_file = 0;
2260         if (DEBUG_GTE(FLIST, 1)) {
2261                 rprintf(FINFO, "delta-transmission %s\n",
2262                         whole_file
2263                         ? "disabled for local transfer or --whole-file"
2264                         : "enabled");
2265         }
2266
2267         dflt_perms = (ACCESSPERMS & ~orig_umask);
2268
2269         do {
2270 #ifdef SUPPORT_HARD_LINKS
2271                 if (preserve_hard_links && inc_recurse) {
2272                         while (!flist_eof && file_total < MIN_FILECNT_LOOKAHEAD/2)
2273                                 wait_for_receiver();
2274                 }
2275 #endif
2276
2277                 if (inc_recurse && cur_flist->parent_ndx >= 0) {
2278                         struct file_struct *fp = dir_flist->files[cur_flist->parent_ndx];
2279                         if (solo_file)
2280                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2281                         else
2282                                 f_name(fp, fbuf);
2283                         ndx = cur_flist->ndx_start - 1;
2284                         recv_generator(fbuf, fp, ndx, itemizing, code, f_out);
2285                         if (delete_during && dry_run < 2 && !list_only
2286                          && !(fp->flags & FLAG_MISSING_DIR)) {
2287                                 if (fp->flags & FLAG_CONTENT_DIR) {
2288                                         dev_t dirdev;
2289                                         if (one_file_system) {
2290                                                 uint32 *devp = F_DIR_DEV_P(fp);
2291                                                 dirdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
2292                                         } else
2293                                                 dirdev = MAKEDEV(0, 0);
2294                                         delete_in_dir(fbuf, fp, dirdev);
2295                                 } else
2296                                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(fp));
2297                         }
2298                 }
2299                 for (i = cur_flist->low; i <= cur_flist->high; i++) {
2300                         struct file_struct *file = cur_flist->sorted[i];
2301
2302                         if (!F_IS_ACTIVE(file))
2303                                 continue;
2304
2305                         if (unsort_ndx)
2306                                 ndx = F_NDX(file);
2307                         else
2308                                 ndx = i + cur_flist->ndx_start;
2309
2310                         if (solo_file)
2311                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2312                         else
2313                                 f_name(file, fbuf);
2314                         recv_generator(fbuf, file, ndx, itemizing, code, f_out);
2315
2316                         check_for_finished_files(itemizing, code, 0);
2317
2318                         if (i + cur_flist->ndx_start >= next_loopchk) {
2319                                 if (allowed_lull)
2320                                         maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
2321                                 else
2322                                         maybe_flush_socket(0);
2323                                 next_loopchk += loopchk_limit;
2324                         }
2325                 }
2326
2327                 if (!inc_recurse) {
2328                         write_ndx(f_out, NDX_DONE);
2329                         break;
2330                 }
2331
2332                 while (1) {
2333                         check_for_finished_files(itemizing, code, 1);
2334                         if (cur_flist->next || flist_eof)
2335                                 break;
2336                         wait_for_receiver();
2337                 }
2338         } while ((cur_flist = cur_flist->next) != NULL);
2339
2340         if (delete_during)
2341                 delete_in_dir(NULL, NULL, dev_zero);
2342         phase++;
2343         if (DEBUG_GTE(GENR, 1))
2344                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2345
2346         while (1) {
2347                 check_for_finished_files(itemizing, code, 1);
2348                 if (msgdone_cnt)
2349                         break;
2350                 wait_for_receiver();
2351         }
2352
2353         phase++;
2354         if (DEBUG_GTE(GENR, 1))
2355                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2356
2357         write_ndx(f_out, NDX_DONE);
2358
2359         /* Reduce round-trip lag-time for a useless delay-updates phase. */
2360         if (protocol_version >= 29 && EARLY_DELAY_DONE_MSG())
2361                 write_ndx(f_out, NDX_DONE);
2362
2363         if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG()) {
2364                 if ((INFO_GTE(STATS, 2) && (delete_mode || force_delete)) || read_batch)
2365                         write_del_stats(f_out);
2366                 if (EARLY_DELAY_DONE_MSG()) /* Can't send this before delay */
2367                         write_ndx(f_out, NDX_DONE);
2368         }
2369
2370         /* Read MSG_DONE for the redo phase (and any prior messages). */
2371         while (1) {
2372                 check_for_finished_files(itemizing, code, 0);
2373                 if (msgdone_cnt > 1)
2374                         break;
2375                 wait_for_receiver();
2376         }
2377
2378         if (protocol_version >= 29) {
2379                 phase++;
2380                 if (DEBUG_GTE(GENR, 1))
2381                         rprintf(FINFO, "generate_files phase=%d\n", phase);
2382                 if (!EARLY_DELAY_DONE_MSG()) {
2383                         write_ndx(f_out, NDX_DONE);
2384                         if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG())
2385                                 write_ndx(f_out, NDX_DONE);
2386                 }
2387                 /* Read MSG_DONE for delay-updates phase & prior messages. */
2388                 while (msgdone_cnt == 2)
2389                         wait_for_receiver();
2390         }
2391
2392         info_levels[INFO_FLIST] = save_info_flist;
2393         info_levels[INFO_PROGRESS] = save_info_progress;
2394
2395         if (delete_during == 2)
2396                 do_delayed_deletions(fbuf);
2397         if (delete_after && !solo_file && file_total > 0)
2398                 do_delete_pass();
2399
2400         if (max_delete >= 0 && skipped_deletes) {
2401                 rprintf(FWARNING,
2402                         "Deletions stopped due to --max-delete limit (%d skipped)\n",
2403                         skipped_deletes);
2404                 io_error |= IOERR_DEL_LIMIT;
2405         }
2406
2407         if (protocol_version >= 31) {
2408                 if (!EARLY_DELETE_DONE_MSG()) {
2409                         if (INFO_GTE(STATS, 2) || read_batch)
2410                                 write_del_stats(f_out);
2411                         write_ndx(f_out, NDX_DONE);
2412                 }
2413
2414                 /* Read MSG_DONE for late-delete phase & prior messages. */
2415                 while (msgdone_cnt == 3)
2416                         wait_for_receiver();
2417         }
2418
2419         if ((need_retouch_dir_perms || need_retouch_dir_times)
2420          && dir_tweaking && (!inc_recurse || delete_during == 2))
2421                 touch_up_dirs(dir_flist, -1);
2422
2423         if (DEBUG_GTE(GENR, 1))
2424                 rprintf(FINFO, "generate_files finished\n");
2425 }