flist.c

   1 /*
   2  * Generate and receive file lists.
   3  *
   4  * Copyright (C) 1996 Andrew Tridgell
   5  * Copyright (C) 1996 Paul Mackerras
   6  * Copyright (C) 2001, 2002 Martin Pool <mbp@samba.org>
   7  * Copyright (C) 2002-2009 Wayne Davison
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 3 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, visit the http://fsf.org website.
  21  */
  22
  23 #include "rsync.h"
  24 #include "ifuncs.h"
  25 #include "rounding.h"
  26 #include "io.h"
  27
  28 extern int verbose;
  29 extern int am_root;
  30 extern int am_server;
  31 extern int am_daemon;
  32 extern int am_sender;
  33 extern int am_generator;
  34 extern int inc_recurse;
  35 extern int do_progress;
  36 extern int always_checksum;
  37 extern int module_id;
  38 extern int ignore_errors;
  39 extern int numeric_ids;
  40 extern int recurse;
  41 extern int use_qsort;
  42 extern int xfer_dirs;
  43 extern int filesfrom_fd;
  44 extern int one_file_system;
  45 extern int copy_dirlinks;
  46 extern int preserve_uid;
  47 extern int preserve_gid;
  48 extern int preserve_acls;
  49 extern int preserve_xattrs;
  50 extern int preserve_links;
  51 extern int preserve_hard_links;
  52 extern int preserve_devices;
  53 extern int preserve_specials;
  54 extern int delete_during;
  55 extern int uid_ndx;
  56 extern int gid_ndx;
  57 extern int eol_nulls;
  58 extern int relative_paths;
  59 extern int implied_dirs;
  60 extern int file_extra_cnt;
  61 extern int ignore_perishable;
  62 extern int non_perishable_cnt;
  63 extern int prune_empty_dirs;
  64 extern int copy_links;
  65 extern int copy_unsafe_links;
  66 extern int protocol_version;
  67 extern int sanitize_paths;
  68 extern int munge_symlinks;
  69 extern int use_safe_inc_flist;
  70 extern int need_unsorted_flist;
  71 extern int sender_symlink_iconv;
  72 extern int unsort_ndx;
  73 extern struct stats stats;
  74 extern char *filesfrom_host;
  75
  76 extern char curr_dir[MAXPATHLEN];
  77
  78 extern struct chmod_mode_struct *chmod_modes;
  79
  80 extern struct filter_list_struct filter_list;
  81 extern struct filter_list_struct daemon_filter_list;
  82
  83 #ifdef ICONV_OPTION
  84 extern int filesfrom_convert;
  85 extern iconv_t ic_send, ic_recv;
  86 #endif
  87
  88 #define PTR_SIZE (sizeof (struct file_struct *))
  89
  90 int io_error;
  91 int checksum_len;
  92 dev_t filesystem_dev; /* used to implement -x */
  93
  94 struct file_list *cur_flist, *first_flist, *dir_flist;
  95 int send_dir_ndx = -1, send_dir_depth = -1;
  96 int flist_cnt = 0; /* how many (non-tmp) file list objects exist */
  97 int file_total = 0; /* total of all active items over all file-lists */
  98 int flist_eof = 0; /* all the file-lists are now known */
  99
 100 #define NORMAL_NAME 0
 101 #define SLASH_ENDING_NAME 1
 102 #define DOTDIR_NAME 2
 103
 104 /* Starting from protocol version 26, we always use 64-bit ino_t and dev_t
 105  * internally, even if this platform does not allow files to have 64-bit inums.
 106  * The only exception is if we're on a platform with no 64-bit type at all.
 107  *
 108  * Because we use read_longint() to get these off the wire, if you transfer
 109  * devices or (for protocols < 30) hardlinks with dev or inum > 2**32 to a
 110  * machine with no 64-bit types then you will get an overflow error.
 111  *
 112  * Note that if you transfer devices from a 64-bit-devt machine (say, Solaris)
 113  * to a 32-bit-devt machine (say, Linux-2.2/x86) then the device numbers will
 114  * be truncated.  But it's a kind of silly thing to do anyhow. */
 115
 116 /* The tmp_* vars are used as a cache area by make_file() to store data
 117  * that the sender doesn't need to remember in its file list.  The data
 118  * will survive just long enough to be used by send_file_entry(). */
 119 static dev_t tmp_rdev;
 120 #ifdef SUPPORT_HARD_LINKS
 121 static int64 tmp_dev, tmp_ino;
 122 #endif
 123 static char tmp_sum[MAX_DIGEST_LEN];
 124
 125 static char empty_sum[MAX_DIGEST_LEN];
 126 static int flist_count_offset; /* for --delete --progress */
 127 static int dir_count = 0;
 128
 129 static void flist_sort_and_clean(struct file_list *flist, int strip_root);
 130 static void output_flist(struct file_list *flist);
 131
 132 void init_flist(void)
 133 {
 134         if (verbose > 4) {
 135                 rprintf(FINFO, "FILE_STRUCT_LEN=%d, EXTRA_LEN=%d\n",
 136                         (int)FILE_STRUCT_LEN, (int)EXTRA_LEN);
 137         }
 138         checksum_len = protocol_version < 21 ? 2
 139                      : protocol_version < 30 ? MD4_DIGEST_LEN
 140                      : MD5_DIGEST_LEN;
 141 }
 142
 143 static int show_filelist_p(void)
 144 {
 145         return verbose && xfer_dirs && !am_server && !inc_recurse;
 146 }
 147
 148 static void start_filelist_progress(char *kind)
 149 {
 150         rprintf(FCLIENT, "%s ... ", kind);
 151         if (verbose > 1 || do_progress)
 152                 rprintf(FCLIENT, "\n");
 153         rflush(FINFO);
 154 }
 155
 156 static void emit_filelist_progress(int count)
 157 {
 158         rprintf(FCLIENT, " %d files...\r", count);
 159 }
 160
 161 static void maybe_emit_filelist_progress(int count)
 162 {
 163         if (do_progress && show_filelist_p() && (count % 100) == 0)
 164                 emit_filelist_progress(count);
 165 }
 166
 167 static void finish_filelist_progress(const struct file_list *flist)
 168 {
 169         if (do_progress) {
 170                 /* This overwrites the progress line */
 171                 rprintf(FINFO, "%d file%sto consider\n",
 172                         flist->used, flist->used == 1 ? " " : "s ");
 173         } else
 174                 rprintf(FINFO, "done\n");
 175 }
 176
 177 void show_flist_stats(void)
 178 {
 179         /* Nothing yet */
 180 }
 181
 182 /* Stat either a symlink or its referent, depending on the settings of
 183  * copy_links, copy_unsafe_links, etc.  Returns -1 on error, 0 on success.
 184  *
 185  * If path is the name of a symlink, then the linkbuf buffer (which must hold
 186  * MAXPATHLEN chars) will be set to the symlink's target string.
 187  *
 188  * The stat structure pointed to by stp will contain information about the
 189  * link or the referent as appropriate, if they exist. */
 190 static int readlink_stat(const char *path, STRUCT_STAT *stp, char *linkbuf)
 191 {
 192 #ifdef SUPPORT_LINKS
 193         if (link_stat(path, stp, copy_dirlinks) < 0)
 194                 return -1;
 195         if (S_ISLNK(stp->st_mode)) {
 196                 int llen = readlink(path, linkbuf, MAXPATHLEN - 1);
 197                 if (llen < 0)
 198                         return -1;
 199                 linkbuf[llen] = '\0';
 200                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 201                         if (verbose > 1) {
 202                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 203                                         path, linkbuf);
 204                         }
 205                         return x_stat(path, stp, NULL);
 206                 }
 207                 if (munge_symlinks && am_sender && llen > SYMLINK_PREFIX_LEN
 208                  && strncmp(linkbuf, SYMLINK_PREFIX, SYMLINK_PREFIX_LEN) == 0) {
 209                         memmove(linkbuf, linkbuf + SYMLINK_PREFIX_LEN,
 210                                 llen - SYMLINK_PREFIX_LEN + 1);
 211                 }
 212         }
 213         return 0;
 214 #else
 215         return x_stat(path, stp, NULL);
 216 #endif
 217 }
 218
 219 int link_stat(const char *path, STRUCT_STAT *stp, int follow_dirlinks)
 220 {
 221 #ifdef SUPPORT_LINKS
 222         if (copy_links)
 223                 return x_stat(path, stp, NULL);
 224         if (x_lstat(path, stp, NULL) < 0)
 225                 return -1;
 226         if (follow_dirlinks && S_ISLNK(stp->st_mode)) {
 227                 STRUCT_STAT st;
 228                 if (x_stat(path, &st, NULL) == 0 && S_ISDIR(st.st_mode))
 229                         *stp = st;
 230         }
 231         return 0;
 232 #else
 233         return x_stat(path, stp, NULL);
 234 #endif
 235 }
 236
 237 static inline int is_daemon_excluded(const char *fname, int is_dir)
 238 {
 239         if (daemon_filter_list.head
 240          && check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
 241                 errno = ENOENT;
 242                 return 1;
 243         }
 244         return 0;
 245 }
 246
 247 static inline int path_is_daemon_excluded(char *path, int ignore_filename)
 248 {
 249         if (daemon_filter_list.head) {
 250                 char *slash = path;
 251
 252                 while ((slash = strchr(slash+1, '/')) != NULL) {
 253                         int ret;
 254                         *slash = '\0';
 255                         ret = check_filter(&daemon_filter_list, FLOG, path, 1);
 256                         *slash = '/';
 257                         if (ret < 0) {
 258                                 errno = ENOENT;
 259                                 return 1;
 260                         }
 261                 }
 262
 263                 if (!ignore_filename
 264                  && check_filter(&daemon_filter_list, FLOG, path, 1) < 0) {
 265                         errno = ENOENT;
 266                         return 1;
 267                 }
 268         }
 269
 270         return 0;
 271 }
 272
 273 /* This function is used to check if a file should be included/excluded
 274  * from the list of files based on its name and type etc.  The value of
 275  * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
 276 static int is_excluded(const char *fname, int is_dir, int filter_level)
 277 {
 278 #if 0 /* This currently never happens, so avoid a useless compare. */
 279         if (filter_level == NO_FILTERS)
 280                 return 0;
 281 #endif
 282         if (is_daemon_excluded(fname, is_dir))
 283                 return 1;
 284         if (filter_level != ALL_FILTERS)
 285                 return 0;
 286         if (filter_list.head
 287             && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
 288                 return 1;
 289         return 0;
 290 }
 291
 292 static void send_directory(int f, struct file_list *flist,
 293                            char *fbuf, int len, int flags);
 294
 295 static const char *pathname, *orig_dir;
 296 static int pathname_len;
 297
 298 /* Make sure flist can hold at least flist->used + extra entries. */
 299 static void flist_expand(struct file_list *flist, int extra)
 300 {
 301         struct file_struct **new_ptr;
 302
 303         if (flist->used + extra <= flist->malloced)
 304                 return;
 305
 306         if (flist->malloced < FLIST_START)
 307                 flist->malloced = FLIST_START;
 308         else if (flist->malloced >= FLIST_LINEAR)
 309                 flist->malloced += FLIST_LINEAR;
 310         else
 311                 flist->malloced *= 2;
 312
 313         /* In case count jumped or we are starting the list
 314          * with a known size just set it. */
 315         if (flist->malloced < flist->used + extra)
 316                 flist->malloced = flist->used + extra;
 317
 318         new_ptr = realloc_array(flist->files, struct file_struct *,
 319                                 flist->malloced);
 320
 321         if (verbose >= 2 && flist->malloced != FLIST_START) {
 322                 rprintf(FCLIENT, "[%s] expand file_list pointer array to %.0f bytes, did%s move\n",
 323                     who_am_i(),
 324                     (double)sizeof flist->files[0] * flist->malloced,
 325                     (new_ptr == flist->files) ? " not" : "");
 326         }
 327
 328         flist->files = new_ptr;
 329
 330         if (!flist->files)
 331                 out_of_memory("flist_expand");
 332 }
 333
 334 static void flist_done_allocating(struct file_list *flist)
 335 {
 336         void *ptr = pool_boundary(flist->file_pool, 8*1024);
 337         if (flist->pool_boundary == ptr)
 338                 flist->pool_boundary = NULL; /* list didn't use any pool memory */
 339         else
 340                 flist->pool_boundary = ptr;
 341 }
 342
 343 /* Call this with EITHER (1) "file, NULL, 0" to chdir() to the file's
 344  * F_PATHNAME(), or (2) "NULL, dir, dirlen" to chdir() to the supplied dir,
 345  * with dir == NULL taken to be the starting directory, and dirlen < 0
 346  * indicating that strdup(dir) should be called and then the -dirlen length
 347  * value checked to ensure that it is not daemon-excluded. */
 348 int change_pathname(struct file_struct *file, const char *dir, int dirlen)
 349 {
 350         if (dirlen < 0) {
 351                 char *cpy = strdup(dir);
 352                 if (*cpy != '/')
 353                         change_dir(orig_dir, CD_SKIP_CHDIR);
 354                 if (path_is_daemon_excluded(cpy, 0))
 355                         goto chdir_error;
 356                 dir = cpy;
 357                 dirlen = -dirlen;
 358         } else {
 359                 if (file) {
 360                         if (pathname == F_PATHNAME(file))
 361                                 return 1;
 362                         dir = F_PATHNAME(file);
 363                         if (dir)
 364                                 dirlen = strlen(dir);
 365                 } else if (pathname == dir)
 366                         return 1;
 367                 if (dir && *dir != '/')
 368                         change_dir(orig_dir, CD_SKIP_CHDIR);
 369         }
 370
 371         pathname = dir;
 372         pathname_len = dirlen;
 373
 374         if (!dir)
 375                 dir = orig_dir;
 376
 377         if (!change_dir(dir, CD_NORMAL)) {
 378           chdir_error:
 379                 io_error |= IOERR_GENERAL;
 380                 rsyserr(FERROR_XFER, errno, "change_dir %s failed", full_fname(dir));
 381                 if (dir != orig_dir)
 382                         change_dir(orig_dir, CD_NORMAL);
 383                 pathname = NULL;
 384                 pathname_len = 0;
 385                 return 0;
 386         }
 387
 388         return 1;
 389 }
 390
 391 static void send_file_entry(int f, const char *fname, struct file_struct *file,
 392 #ifdef SUPPORT_LINKS
 393                             const char *symlink_name, int symlink_len,
 394 #endif
 395                             int ndx, int first_ndx)
 396 {
 397         static time_t modtime;
 398         static mode_t mode;
 399 #ifdef SUPPORT_HARD_LINKS
 400         static int64 dev;
 401 #endif
 402         static dev_t rdev;
 403         static uint32 rdev_major;
 404         static uid_t uid;
 405         static gid_t gid;
 406         static const char *user_name, *group_name;
 407         static char lastname[MAXPATHLEN];
 408         int first_hlink_ndx = -1;
 409         int l1, l2;
 410         int xflags;
 411
 412         /* Initialize starting value of xflags. */
 413         if (protocol_version >= 30 && S_ISDIR(file->mode)) {
 414                 dir_count++;
 415                 if (file->flags & FLAG_CONTENT_DIR)
 416                         xflags = file->flags & FLAG_TOP_DIR;
 417                 else if (file->flags & FLAG_IMPLIED_DIR)
 418                         xflags = XMIT_TOP_DIR | XMIT_NO_CONTENT_DIR;
 419                 else
 420                         xflags = XMIT_NO_CONTENT_DIR;
 421         } else
 422                 xflags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */
 423
 424         if (file->mode == mode)
 425                 xflags |= XMIT_SAME_MODE;
 426         else
 427                 mode = file->mode;
 428
 429         if (preserve_devices && IS_DEVICE(mode)) {
 430                 if (protocol_version < 28) {
 431                         if (tmp_rdev == rdev)
 432                                 xflags |= XMIT_SAME_RDEV_pre28;
 433                         else
 434                                 rdev = tmp_rdev;
 435                 } else {
 436                         rdev = tmp_rdev;
 437                         if ((uint32)major(rdev) == rdev_major)
 438                                 xflags |= XMIT_SAME_RDEV_MAJOR;
 439                         else
 440                                 rdev_major = major(rdev);
 441                         if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu)
 442                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
 443                 }
 444         } else if (preserve_specials && IS_SPECIAL(mode)) {
 445                 /* Special files don't need an rdev number, so just make
 446                  * the historical transmission of the value efficient. */
 447                 if (protocol_version < 28)
 448                         xflags |= XMIT_SAME_RDEV_pre28;
 449                 else {
 450                         rdev = MAKEDEV(major(rdev), 0);
 451                         xflags |= XMIT_SAME_RDEV_MAJOR;
 452                         if (protocol_version < 30)
 453                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
 454                 }
 455         } else if (protocol_version < 28)
 456                 rdev = MAKEDEV(0, 0);
 457         if (!preserve_uid || ((uid_t)F_OWNER(file) == uid && *lastname))
 458                 xflags |= XMIT_SAME_UID;
 459         else {
 460                 uid = F_OWNER(file);
 461                 if (!numeric_ids) {
 462                         user_name = add_uid(uid);
 463                         if (inc_recurse && user_name)
 464                                 xflags |= XMIT_USER_NAME_FOLLOWS;
 465                 }
 466         }
 467         if (!preserve_gid || ((gid_t)F_GROUP(file) == gid && *lastname))
 468                 xflags |= XMIT_SAME_GID;
 469         else {
 470                 gid = F_GROUP(file);
 471                 if (!numeric_ids) {
 472                         group_name = add_gid(gid);
 473                         if (inc_recurse && group_name)
 474                                 xflags |= XMIT_GROUP_NAME_FOLLOWS;
 475                 }
 476         }
 477         if (file->modtime == modtime)
 478                 xflags |= XMIT_SAME_TIME;
 479         else
 480                 modtime = file->modtime;
 481
 482 #ifdef SUPPORT_HARD_LINKS
 483         if (tmp_dev != 0) {
 484                 if (protocol_version >= 30) {
 485                         struct ht_int64_node *np = idev_find(tmp_dev, tmp_ino);
 486                         first_hlink_ndx = (int32)(long)np->data - 1;
 487                         if (first_hlink_ndx < 0) {
 488                                 np->data = (void*)(long)(first_ndx + ndx + 1);
 489                                 xflags |= XMIT_HLINK_FIRST;
 490                         }
 491                 } else {
 492                         if (tmp_dev == dev) {
 493                                 if (protocol_version >= 28)
 494                                         xflags |= XMIT_SAME_DEV_pre30;
 495                         } else
 496                                 dev = tmp_dev;
 497                 }
 498                 xflags |= XMIT_HLINKED;
 499         }
 500 #endif
 501
 502         for (l1 = 0;
 503             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 504             l1++) {}
 505         l2 = strlen(fname+l1);
 506
 507         if (l1 > 0)
 508                 xflags |= XMIT_SAME_NAME;
 509         if (l2 > 255)
 510                 xflags |= XMIT_LONG_NAME;
 511
 512         /* We must make sure we don't send a zero flag byte or the
 513          * other end will terminate the flist transfer.  Note that
 514          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 515          * it's harmless way to add a bit to the first flag byte. */
 516         if (protocol_version >= 28) {
 517                 if (!xflags && !S_ISDIR(mode))
 518                         xflags |= XMIT_TOP_DIR;
 519                 if ((xflags & 0xFF00) || !xflags) {
 520                         xflags |= XMIT_EXTENDED_FLAGS;
 521                         write_shortint(f, xflags);
 522                 } else
 523                         write_byte(f, xflags);
 524         } else {
 525                 if (!(xflags & 0xFF))
 526                         xflags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
 527                 write_byte(f, xflags);
 528         }
 529         if (xflags & XMIT_SAME_NAME)
 530                 write_byte(f, l1);
 531         if (xflags & XMIT_LONG_NAME)
 532                 write_varint30(f, l2);
 533         else
 534                 write_byte(f, l2);
 535         write_buf(f, fname + l1, l2);
 536
 537         if (first_hlink_ndx >= 0) {
 538                 write_varint(f, first_hlink_ndx);
 539                 if (first_hlink_ndx >= first_ndx)
 540                         goto the_end;
 541         }
 542
 543         write_varlong30(f, F_LENGTH(file), 3);
 544         if (!(xflags & XMIT_SAME_TIME)) {
 545                 if (protocol_version >= 30)
 546                         write_varlong(f, modtime, 4);
 547                 else
 548                         write_int(f, modtime);
 549         }
 550         if (!(xflags & XMIT_SAME_MODE))
 551                 write_int(f, to_wire_mode(mode));
 552         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
 553                 if (protocol_version < 30)
 554                         write_int(f, uid);
 555                 else {
 556                         write_varint(f, uid);
 557                         if (xflags & XMIT_USER_NAME_FOLLOWS) {
 558                                 int len = strlen(user_name);
 559                                 write_byte(f, len);
 560                                 write_buf(f, user_name, len);
 561                         }
 562                 }
 563         }
 564         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
 565                 if (protocol_version < 30)
 566                         write_int(f, gid);
 567                 else {
 568                         write_varint(f, gid);
 569                         if (xflags & XMIT_GROUP_NAME_FOLLOWS) {
 570                                 int len = strlen(group_name);
 571                                 write_byte(f, len);
 572                                 write_buf(f, group_name, len);
 573                         }
 574                 }
 575         }
 576         if ((preserve_devices && IS_DEVICE(mode))
 577          || (preserve_specials && IS_SPECIAL(mode))) {
 578                 if (protocol_version < 28) {
 579                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 580                                 write_int(f, (int)rdev);
 581                 } else {
 582                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 583                                 write_varint30(f, major(rdev));
 584                         if (protocol_version >= 30)
 585                                 write_varint(f, minor(rdev));
 586                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 587                                 write_byte(f, minor(rdev));
 588                         else
 589                                 write_int(f, minor(rdev));
 590                 }
 591         }
 592
 593 #ifdef SUPPORT_LINKS
 594         if (symlink_len) {
 595                 write_varint30(f, symlink_len);
 596                 write_buf(f, symlink_name, symlink_len);
 597         }
 598 #endif
 599
 600 #ifdef SUPPORT_HARD_LINKS
 601         if (tmp_dev != 0 && protocol_version < 30) {
 602                 if (protocol_version < 26) {
 603                         /* 32-bit dev_t and ino_t */
 604                         write_int(f, (int32)dev);
 605                         write_int(f, (int32)tmp_ino);
 606                 } else {
 607                         /* 64-bit dev_t and ino_t */
 608                         if (!(xflags & XMIT_SAME_DEV_pre30))
 609                                 write_longint(f, dev);
 610                         write_longint(f, tmp_ino);
 611                 }
 612         }
 613 #endif
 614
 615         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 616                 const char *sum;
 617                 if (S_ISREG(mode))
 618                         sum = tmp_sum;
 619                 else {
 620                         /* Prior to 28, we sent a useless set of nulls. */
 621                         sum = empty_sum;
 622                 }
 623                 write_buf(f, sum, checksum_len);
 624         }
 625
 626   the_end:
 627         strlcpy(lastname, fname, MAXPATHLEN);
 628
 629         if (S_ISREG(mode) || S_ISLNK(mode))
 630                 stats.total_size += F_LENGTH(file);
 631 }
 632
 633 static struct file_struct *recv_file_entry(struct file_list *flist,
 634                                            int xflags, int f)
 635 {
 636         static int64 modtime;
 637         static mode_t mode;
 638 #ifdef SUPPORT_HARD_LINKS
 639         static int64 dev;
 640 #endif
 641         static dev_t rdev;
 642         static uint32 rdev_major;
 643         static uid_t uid;
 644         static gid_t gid;
 645         static uint16 gid_flags;
 646         static char lastname[MAXPATHLEN], *lastdir;
 647         static int lastdir_depth, lastdir_len = -1;
 648         static unsigned int del_hier_name_len = 0;
 649         static int in_del_hier = 0;
 650         char thisname[MAXPATHLEN];
 651         unsigned int l1 = 0, l2 = 0;
 652         int alloc_len, basename_len, linkname_len;
 653         int extra_len = file_extra_cnt * EXTRA_LEN;
 654         int first_hlink_ndx = -1;
 655         int64 file_length;
 656         const char *basename;
 657         struct file_struct *file;
 658         alloc_pool_t *pool;
 659         char *bp;
 660
 661         if (xflags & XMIT_SAME_NAME)
 662                 l1 = read_byte(f);
 663
 664         if (xflags & XMIT_LONG_NAME)
 665                 l2 = read_varint30(f);
 666         else
 667                 l2 = read_byte(f);
 668
 669         if (l2 >= MAXPATHLEN - l1) {
 670                 rprintf(FERROR,
 671                         "overflow: xflags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
 672                         xflags, l1, l2, lastname, who_am_i());
 673                 overflow_exit("recv_file_entry");
 674         }
 675
 676         strlcpy(thisname, lastname, l1 + 1);
 677         read_sbuf(f, &thisname[l1], l2);
 678         thisname[l1 + l2] = 0;
 679
 680         /* Abuse basename_len for a moment... */
 681         basename_len = strlcpy(lastname, thisname, MAXPATHLEN);
 682
 683 #ifdef ICONV_OPTION
 684         if (ic_recv != (iconv_t)-1) {
 685                 xbuf outbuf, inbuf;
 686
 687                 INIT_CONST_XBUF(outbuf, thisname);
 688                 INIT_XBUF(inbuf, lastname, basename_len, -1);
 689
 690                 if (iconvbufs(ic_recv, &inbuf, &outbuf, 0) < 0) {
 691                         io_error |= IOERR_GENERAL;
 692                         rprintf(FERROR_UTF8,
 693                             "[%s] cannot convert filename: %s (%s)\n",
 694                             who_am_i(), lastname, strerror(errno));
 695                         outbuf.len = 0;
 696                 }
 697                 thisname[outbuf.len] = '\0';
 698         }
 699 #endif
 700
 701         if (*thisname)
 702                 clean_fname(thisname, 0);
 703
 704         if (sanitize_paths)
 705                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
 706
 707         if ((basename = strrchr(thisname, '/')) != NULL) {
 708                 int len = basename++ - thisname;
 709                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
 710                         lastdir = new_array(char, len + 1);
 711                         memcpy(lastdir, thisname, len);
 712                         lastdir[len] = '\0';
 713                         lastdir_len = len;
 714                         lastdir_depth = count_dir_elements(lastdir);
 715                 }
 716         } else
 717                 basename = thisname;
 718         basename_len = strlen(basename) + 1; /* count the '\0' */
 719
 720 #ifdef SUPPORT_HARD_LINKS
 721         if (protocol_version >= 30
 722          && BITS_SETnUNSET(xflags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
 723                 first_hlink_ndx = read_varint(f);
 724                 if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->ndx_start + flist->used) {
 725                         rprintf(FERROR,
 726                                 "hard-link reference out of range: %d (%d)\n",
 727                                 first_hlink_ndx, flist->ndx_start + flist->used);
 728                         exit_cleanup(RERR_PROTOCOL);
 729                 }
 730                 if (first_hlink_ndx >= flist->ndx_start) {
 731                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 732                         file_length = F_LENGTH(first);
 733                         modtime = first->modtime;
 734                         mode = first->mode;
 735                         if (preserve_uid)
 736                                 uid = F_OWNER(first);
 737                         if (preserve_gid)
 738                                 gid = F_GROUP(first);
 739                         if (preserve_devices && IS_DEVICE(mode)) {
 740                                 uint32 *devp = F_RDEV_P(first);
 741                                 rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
 742                                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 743                         }
 744                         if (preserve_links && S_ISLNK(mode))
 745                                 linkname_len = strlen(F_SYMLINK(first)) + 1;
 746                         else
 747                                 linkname_len = 0;
 748                         goto create_object;
 749                 }
 750         }
 751 #endif
 752
 753         file_length = read_varlong30(f, 3);
 754         if (!(xflags & XMIT_SAME_TIME)) {
 755                 if (protocol_version >= 30) {
 756                         modtime = read_varlong(f, 4);
 757 #if SIZEOF_TIME_T < SIZEOF_INT64
 758                         if (!am_generator && (int64)(time_t)modtime != modtime) {
 759                                 rprintf(FERROR_XFER,
 760                                     "Time value of %s truncated on receiver.\n",
 761                                     lastname);
 762                         }
 763 #endif
 764                 } else
 765                         modtime = read_int(f);
 766         }
 767         if (!(xflags & XMIT_SAME_MODE))
 768                 mode = from_wire_mode(read_int(f));
 769
 770         if (chmod_modes && !S_ISLNK(mode))
 771                 mode = tweak_mode(mode, chmod_modes);
 772
 773         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
 774                 if (protocol_version < 30)
 775                         uid = (uid_t)read_int(f);
 776                 else {
 777                         uid = (uid_t)read_varint(f);
 778                         if (xflags & XMIT_USER_NAME_FOLLOWS)
 779                                 uid = recv_user_name(f, uid);
 780                         else if (inc_recurse && am_root && !numeric_ids)
 781                                 uid = match_uid(uid);
 782                 }
 783         }
 784         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
 785                 if (protocol_version < 30)
 786                         gid = (gid_t)read_int(f);
 787                 else {
 788                         gid = (gid_t)read_varint(f);
 789                         gid_flags = 0;
 790                         if (xflags & XMIT_GROUP_NAME_FOLLOWS)
 791                                 gid = recv_group_name(f, gid, &gid_flags);
 792                         else if (inc_recurse && (!am_root || !numeric_ids))
 793                                 gid = match_gid(gid, &gid_flags);
 794                 }
 795         }
 796
 797         if ((preserve_devices && IS_DEVICE(mode))
 798          || (preserve_specials && IS_SPECIAL(mode))) {
 799                 if (protocol_version < 28) {
 800                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 801                                 rdev = (dev_t)read_int(f);
 802                 } else {
 803                         uint32 rdev_minor;
 804                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 805                                 rdev_major = read_varint30(f);
 806                         if (protocol_version >= 30)
 807                                 rdev_minor = read_varint(f);
 808                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 809                                 rdev_minor = read_byte(f);
 810                         else
 811                                 rdev_minor = read_int(f);
 812                         rdev = MAKEDEV(rdev_major, rdev_minor);
 813                 }
 814                 if (IS_DEVICE(mode))
 815                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 816                 file_length = 0;
 817         } else if (protocol_version < 28)
 818                 rdev = MAKEDEV(0, 0);
 819
 820 #ifdef SUPPORT_LINKS
 821         if (preserve_links && S_ISLNK(mode)) {
 822                 linkname_len = read_varint30(f) + 1; /* count the '\0' */
 823                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 824                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 825                                 linkname_len - 1);
 826                         overflow_exit("recv_file_entry");
 827                 }
 828 #ifdef ICONV_OPTION
 829                 /* We don't know how much extra room we need to convert
 830                  * the as-yet-unread symlink data, so let's hope that a
 831                  * double-size buffer is plenty. */
 832                 if (sender_symlink_iconv)
 833                         linkname_len *= 2;
 834 #endif
 835                 if (munge_symlinks)
 836                         linkname_len += SYMLINK_PREFIX_LEN;
 837         }
 838         else
 839 #endif
 840                 linkname_len = 0;
 841
 842 #ifdef SUPPORT_HARD_LINKS
 843   create_object:
 844         if (preserve_hard_links) {
 845                 if (protocol_version < 28 && S_ISREG(mode))
 846                         xflags |= XMIT_HLINKED;
 847                 if (xflags & XMIT_HLINKED)
 848                         extra_len += (inc_recurse+1) * EXTRA_LEN;
 849         }
 850 #endif
 851
 852 #ifdef SUPPORT_ACLS
 853         /* Directories need an extra int32 for the default ACL. */
 854         if (preserve_acls && S_ISDIR(mode))
 855                 extra_len += EXTRA_LEN;
 856 #endif
 857
 858         if (always_checksum && S_ISREG(mode))
 859                 extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
 860
 861 #if SIZEOF_INT64 >= 8
 862         if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
 863                 extra_len += EXTRA_LEN;
 864 #endif
 865         if (file_length < 0) {
 866                 rprintf(FERROR, "Offset underflow: file-length is negative\n");
 867                 exit_cleanup(RERR_UNSUPPORTED);
 868         }
 869
 870         if (inc_recurse && S_ISDIR(mode)) {
 871                 if (one_file_system) {
 872                         /* Room to save the dir's device for -x */
 873                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 874                 }
 875                 pool = dir_flist->file_pool;
 876         } else
 877                 pool = flist->file_pool;
 878
 879 #if EXTRA_ROUNDING > 0
 880         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
 881                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
 882 #endif
 883
 884         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
 885                   + linkname_len;
 886         bp = pool_alloc(pool, alloc_len, "recv_file_entry");
 887
 888         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
 889         bp += extra_len;
 890         file = (struct file_struct *)bp;
 891         bp += FILE_STRUCT_LEN;
 892
 893         memcpy(bp, basename, basename_len);
 894
 895 #ifdef SUPPORT_HARD_LINKS
 896         if (xflags & XMIT_HLINKED)
 897                 file->flags |= FLAG_HLINKED;
 898 #endif
 899         file->modtime = (time_t)modtime;
 900         file->len32 = (uint32)file_length;
 901 #if SIZEOF_INT64 >= 8
 902         if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
 903 #if SIZEOF_CAPITAL_OFF_T < 8
 904                 rprintf(FERROR, "Offset overflow: attempted 64-bit file-length\n");
 905                 exit_cleanup(RERR_UNSUPPORTED);
 906 #else
 907                 file->flags |= FLAG_LENGTH64;
 908                 OPT_EXTRA(file, 0)->unum = (uint32)(file_length >> 32);
 909 #endif
 910         }
 911 #endif
 912         file->mode = mode;
 913         if (preserve_uid)
 914                 F_OWNER(file) = uid;
 915         if (preserve_gid) {
 916                 F_GROUP(file) = gid;
 917                 file->flags |= gid_flags;
 918         }
 919         if (unsort_ndx)
 920                 F_NDX(file) = flist->used + flist->ndx_start;
 921
 922         if (basename != thisname) {
 923                 file->dirname = lastdir;
 924                 F_DEPTH(file) = lastdir_depth + 1;
 925         } else
 926                 F_DEPTH(file) = 1;
 927
 928         if (S_ISDIR(mode)) {
 929                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
 930                         F_DEPTH(file)--;
 931                 if (protocol_version >= 30) {
 932                         if (!(xflags & XMIT_NO_CONTENT_DIR)) {
 933                                 if (xflags & XMIT_TOP_DIR)
 934                                         file->flags |= FLAG_TOP_DIR;
 935                                 file->flags |= FLAG_CONTENT_DIR;
 936                         } else if (xflags & XMIT_TOP_DIR)
 937                                 file->flags |= FLAG_IMPLIED_DIR;
 938                 } else if (xflags & XMIT_TOP_DIR) {
 939                         in_del_hier = recurse;
 940                         del_hier_name_len = F_DEPTH(file) == 0 ? 0 : l1 + l2;
 941                         if (relative_paths && del_hier_name_len > 2
 942                             && lastname[del_hier_name_len-1] == '.'
 943                             && lastname[del_hier_name_len-2] == '/')
 944                                 del_hier_name_len -= 2;
 945                         file->flags |= FLAG_TOP_DIR | FLAG_CONTENT_DIR;
 946                 } else if (in_del_hier) {
 947                         if (!relative_paths || !del_hier_name_len
 948                          || (l1 >= del_hier_name_len
 949                           && lastname[del_hier_name_len] == '/'))
 950                                 file->flags |= FLAG_CONTENT_DIR;
 951                         else
 952                                 in_del_hier = 0;
 953                 }
 954         }
 955
 956         if (preserve_devices && IS_DEVICE(mode)) {
 957                 uint32 *devp = F_RDEV_P(file);
 958                 DEV_MAJOR(devp) = major(rdev);
 959                 DEV_MINOR(devp) = minor(rdev);
 960         }
 961
 962 #ifdef SUPPORT_LINKS
 963         if (linkname_len) {
 964                 bp += basename_len;
 965                 if (first_hlink_ndx >= flist->ndx_start) {
 966                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 967                         memcpy(bp, F_SYMLINK(first), linkname_len);
 968                 } else {
 969                         if (munge_symlinks) {
 970                                 strlcpy(bp, SYMLINK_PREFIX, linkname_len);
 971                                 bp += SYMLINK_PREFIX_LEN;
 972                                 linkname_len -= SYMLINK_PREFIX_LEN;
 973                         }
 974 #ifdef ICONV_OPTION
 975                         if (sender_symlink_iconv) {
 976                                 xbuf outbuf, inbuf;
 977
 978                                 alloc_len = linkname_len;
 979                                 linkname_len /= 2;
 980
 981                                 /* Read the symlink data into the end of our double-sized
 982                                  * buffer and then convert it into the right spot. */
 983                                 INIT_XBUF(inbuf, bp + alloc_len - linkname_len,
 984                                           linkname_len - 1, (size_t)-1);
 985                                 read_sbuf(f, inbuf.buf, inbuf.len);
 986                                 INIT_XBUF(outbuf, bp, 0, alloc_len);
 987
 988                                 if (iconvbufs(ic_recv, &inbuf, &outbuf, 0) < 0) {
 989                                         io_error |= IOERR_GENERAL;
 990                                         rprintf(FERROR_XFER,
 991                                             "[%s] cannot convert symlink data for: %s (%s)\n",
 992                                             who_am_i(), full_fname(thisname), strerror(errno));
 993                                         bp = (char*)file->basename;
 994                                         *bp++ = '\0';
 995                                         outbuf.len = 0;
 996                                 }
 997                                 bp[outbuf.len] = '\0';
 998                         } else
 999 #endif
1000                                 read_sbuf(f, bp, linkname_len - 1);
1001                         if (sanitize_paths && !munge_symlinks && *bp)
1002                                 sanitize_path(bp, bp, "", lastdir_depth, SP_DEFAULT);
1003                 }
1004         }
1005 #endif
1006
1007 #ifdef SUPPORT_HARD_LINKS
1008         if (preserve_hard_links && xflags & XMIT_HLINKED) {
1009                 if (protocol_version >= 30) {
1010                         if (xflags & XMIT_HLINK_FIRST) {
1011                                 F_HL_GNUM(file) = flist->ndx_start + flist->used;
1012                         } else
1013                                 F_HL_GNUM(file) = first_hlink_ndx;
1014                 } else {
1015                         static int32 cnt = 0;
1016                         struct ht_int64_node *np;
1017                         int64 ino;
1018                         int32 ndx;
1019                         if (protocol_version < 26) {
1020                                 dev = read_int(f);
1021                                 ino = read_int(f);
1022                         } else {
1023                                 if (!(xflags & XMIT_SAME_DEV_pre30))
1024                                         dev = read_longint(f);
1025                                 ino = read_longint(f);
1026                         }
1027                         np = idev_find(dev, ino);
1028                         ndx = (int32)(long)np->data - 1;
1029                         if (ndx < 0) {
1030                                 ndx = cnt++;
1031                                 np->data = (void*)(long)cnt;
1032                         }
1033                         F_HL_GNUM(file) = ndx;
1034                 }
1035         }
1036 #endif
1037
1038         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
1039                 if (S_ISREG(mode))
1040                         bp = F_SUM(file);
1041                 else {
1042                         /* Prior to 28, we get a useless set of nulls. */
1043                         bp = tmp_sum;
1044                 }
1045                 if (first_hlink_ndx >= flist->ndx_start) {
1046                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
1047                         memcpy(bp, F_SUM(first), checksum_len);
1048                 } else
1049                         read_buf(f, bp, checksum_len);
1050         }
1051
1052 #ifdef SUPPORT_ACLS
1053         if (preserve_acls && !S_ISLNK(mode))
1054                 receive_acl(file, f);
1055 #endif
1056 #ifdef SUPPORT_XATTRS
1057         if (preserve_xattrs)
1058                 receive_xattr(file, f );
1059 #endif
1060
1061         if (S_ISREG(mode) || S_ISLNK(mode))
1062                 stats.total_size += file_length;
1063
1064         return file;
1065 }
1066
1067 /* Create a file_struct for a named file by reading its stat() information
1068  * and performing extensive checks against global options.
1069  *
1070  * Returns a pointer to the new file struct, or NULL if there was an error
1071  * or this file should be excluded.
1072  *
1073  * Note: Any error (here or in send_file_name) that results in the omission of
1074  * an existent source file from the file list should set
1075  * "io_error |= IOERR_GENERAL" to avoid deletion of the file from the
1076  * destination if --delete is on. */
1077 struct file_struct *make_file(const char *fname, struct file_list *flist,
1078                               STRUCT_STAT *stp, int flags, int filter_level)
1079 {
1080         static char *lastdir;
1081         static int lastdir_len = -1;
1082         struct file_struct *file;
1083         char thisname[MAXPATHLEN];
1084         char linkname[MAXPATHLEN];
1085         int alloc_len, basename_len, linkname_len;
1086         int extra_len = file_extra_cnt * EXTRA_LEN;
1087         const char *basename;
1088         alloc_pool_t *pool;
1089         STRUCT_STAT st;
1090         char *bp;
1091
1092         if (strlcpy(thisname, fname, sizeof thisname) >= sizeof thisname) {
1093                 io_error |= IOERR_GENERAL;
1094                 rprintf(FERROR_XFER, "skipping overly long name: %s\n", fname);
1095                 return NULL;
1096         }
1097         clean_fname(thisname, 0);
1098         if (sanitize_paths)
1099                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
1100
1101         if (stp && S_ISDIR(stp->st_mode)) {
1102                 st = *stp; /* Needed for "symlink/." with --relative. */
1103                 *linkname = '\0'; /* make IBM code checker happy */
1104         } else if (readlink_stat(thisname, &st, linkname) != 0) {
1105                 int save_errno = errno;
1106                 /* See if file is excluded before reporting an error. */
1107                 if (filter_level != NO_FILTERS
1108                  && (is_excluded(thisname, 0, filter_level)
1109                   || is_excluded(thisname, 1, filter_level))) {
1110                         if (ignore_perishable && save_errno != ENOENT)
1111                                 non_perishable_cnt++;
1112                         return NULL;
1113                 }
1114                 if (save_errno == ENOENT) {
1115 #ifdef SUPPORT_LINKS
1116                         /* When our options tell us to follow a symlink that
1117                          * points nowhere, tell the user about the symlink
1118                          * instead of giving a "vanished" message.  We only
1119                          * dereference a symlink if one of the --copy*links
1120                          * options was specified, so there's no need for the
1121                          * extra lstat() if one of these options isn't on. */
1122                         if ((copy_links || copy_unsafe_links || copy_dirlinks)
1123                          && x_lstat(thisname, &st, NULL) == 0
1124                          && S_ISLNK(st.st_mode)) {
1125                                 io_error |= IOERR_GENERAL;
1126                                 rprintf(FERROR_XFER, "symlink has no referent: %s\n",
1127                                         full_fname(thisname));
1128                         } else
1129 #endif
1130                         {
1131                                 enum logcode c = am_daemon && protocol_version < 28
1132                                                ? FERROR : FWARNING;
1133                                 io_error |= IOERR_VANISHED;
1134                                 rprintf(c, "file has vanished: %s\n",
1135                                         full_fname(thisname));
1136                         }
1137                 } else {
1138                         io_error |= IOERR_GENERAL;
1139                         rsyserr(FERROR_XFER, save_errno, "readlink_stat(%s) failed",
1140                                 full_fname(thisname));
1141                 }
1142                 return NULL;
1143         }
1144
1145         if (filter_level == NO_FILTERS)
1146                 goto skip_filters;
1147
1148         if (S_ISDIR(st.st_mode)) {
1149                 if (!xfer_dirs) {
1150                         rprintf(FINFO, "skipping directory %s\n", thisname);
1151                         return NULL;
1152                 }
1153                 /* -x only affects dirs because we need to avoid recursing
1154                  * into a mount-point directory, not to avoid copying a
1155                  * symlinked file if -L (or similar) was specified. */
1156                 if (one_file_system && st.st_dev != filesystem_dev
1157                  && BITS_SETnUNSET(flags, FLAG_CONTENT_DIR, FLAG_TOP_DIR)) {
1158                         if (one_file_system > 1) {
1159                                 if (verbose > 1) {
1160                                         rprintf(FINFO,
1161                                             "[%s] skipping mount-point dir %s\n",
1162                                             who_am_i(), thisname);
1163                                 }
1164                                 return NULL;
1165                         }
1166                         flags |= FLAG_MOUNT_DIR;
1167                         flags &= ~FLAG_CONTENT_DIR;
1168                 }
1169         } else
1170                 flags &= ~FLAG_CONTENT_DIR;
1171
1172         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level)) {
1173                 if (ignore_perishable)
1174                         non_perishable_cnt++;
1175                 return NULL;
1176         }
1177
1178         if (lp_ignore_nonreadable(module_id)) {
1179 #ifdef SUPPORT_LINKS
1180                 if (!S_ISLNK(st.st_mode))
1181 #endif
1182                         if (access(thisname, R_OK) != 0)
1183                                 return NULL;
1184         }
1185
1186   skip_filters:
1187
1188         /* Only divert a directory in the main transfer. */
1189         if (flist) {
1190                 if (flist->prev && S_ISDIR(st.st_mode)
1191                  && flags & FLAG_DIVERT_DIRS) {
1192                         /* Room for parent/sibling/next-child info. */
1193                         extra_len += DIRNODE_EXTRA_CNT * EXTRA_LEN;
1194                         if (relative_paths)
1195                                 extra_len += PTR_EXTRA_CNT * EXTRA_LEN;
1196                         pool = dir_flist->file_pool;
1197                 } else
1198                         pool = flist->file_pool;
1199         } else {
1200 #ifdef SUPPORT_ACLS
1201                 /* Directories need an extra int32 for the default ACL. */
1202                 if (preserve_acls && S_ISDIR(st.st_mode))
1203                         extra_len += EXTRA_LEN;
1204 #endif
1205                 pool = NULL;
1206         }
1207
1208         if (verbose > 2) {
1209                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
1210                         who_am_i(), thisname, filter_level);
1211         }
1212
1213         if ((basename = strrchr(thisname, '/')) != NULL) {
1214                 int len = basename++ - thisname;
1215                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
1216                         lastdir = new_array(char, len + 1);
1217                         memcpy(lastdir, thisname, len);
1218                         lastdir[len] = '\0';
1219                         lastdir_len = len;
1220                 }
1221         } else
1222                 basename = thisname;
1223         basename_len = strlen(basename) + 1; /* count the '\0' */
1224
1225 #ifdef SUPPORT_LINKS
1226         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
1227 #else
1228         linkname_len = 0;
1229 #endif
1230
1231 #if SIZEOF_CAPITAL_OFF_T >= 8
1232         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
1233                 extra_len += EXTRA_LEN;
1234 #endif
1235
1236 #if EXTRA_ROUNDING > 0
1237         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
1238                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
1239 #endif
1240
1241         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
1242                   + linkname_len;
1243         if (pool)
1244                 bp = pool_alloc(pool, alloc_len, "make_file");
1245         else {
1246                 if (!(bp = new_array(char, alloc_len)))
1247                         out_of_memory("make_file");
1248         }
1249
1250         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
1251         bp += extra_len;
1252         file = (struct file_struct *)bp;
1253         bp += FILE_STRUCT_LEN;
1254
1255         memcpy(bp, basename, basename_len);
1256
1257 #ifdef SUPPORT_HARD_LINKS
1258         if (preserve_hard_links && flist && flist->prev) {
1259                 if (protocol_version >= 28
1260                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
1261                  : S_ISREG(st.st_mode)) {
1262                         tmp_dev = (int64)st.st_dev + 1;
1263                         tmp_ino = (int64)st.st_ino;
1264                 } else
1265                         tmp_dev = 0;
1266         }
1267 #endif
1268
1269 #ifdef HAVE_STRUCT_STAT_ST_RDEV
1270         if (IS_DEVICE(st.st_mode)) {
1271                 tmp_rdev = st.st_rdev;
1272                 st.st_size = 0;
1273         } else if (IS_SPECIAL(st.st_mode))
1274                 st.st_size = 0;
1275 #endif
1276
1277         file->flags = flags;
1278         file->modtime = st.st_mtime;
1279         file->len32 = (uint32)st.st_size;
1280 #if SIZEOF_CAPITAL_OFF_T >= 8
1281         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
1282                 file->flags |= FLAG_LENGTH64;
1283                 OPT_EXTRA(file, 0)->unum = (uint32)(st.st_size >> 32);
1284         }
1285 #endif
1286         file->mode = st.st_mode;
1287         if (uid_ndx) /* Check uid_ndx instead of preserve_uid for del support */
1288                 F_OWNER(file) = st.st_uid;
1289         if (gid_ndx) /* Check gid_ndx instead of preserve_gid for del support */
1290                 F_GROUP(file) = st.st_gid;
1291
1292         if (basename != thisname)
1293                 file->dirname = lastdir;
1294
1295 #ifdef SUPPORT_LINKS
1296         if (linkname_len)
1297                 memcpy(bp + basename_len, linkname, linkname_len);
1298 #endif
1299
1300         if (always_checksum && am_sender && S_ISREG(st.st_mode))
1301                 file_checksum(thisname, tmp_sum, st.st_size);
1302
1303         if (am_sender)
1304                 F_PATHNAME(file) = pathname;
1305         else if (!pool)
1306                 F_DEPTH(file) = extra_len / EXTRA_LEN;
1307
1308         if (basename_len == 0+1) {
1309                 if (!pool)
1310                         unmake_file(file);
1311                 return NULL;
1312         }
1313
1314         if (unsort_ndx)
1315                 F_NDX(file) = dir_count;
1316
1317         return file;
1318 }
1319
1320 /* Only called for temporary file_struct entries created by make_file(). */
1321 void unmake_file(struct file_struct *file)
1322 {
1323         free(REQ_EXTRA(file, F_DEPTH(file)));
1324 }
1325
1326 static struct file_struct *send_file_name(int f, struct file_list *flist,
1327                                           const char *fname, STRUCT_STAT *stp,
1328                                           int flags, int filter_level)
1329 {
1330         struct file_struct *file;
1331
1332         file = make_file(fname, flist, stp, flags, filter_level);
1333         if (!file)
1334                 return NULL;
1335
1336         if (chmod_modes && !S_ISLNK(file->mode))
1337                 file->mode = tweak_mode(file->mode, chmod_modes);
1338
1339         if (f >= 0) {
1340                 char fbuf[MAXPATHLEN];
1341 #ifdef SUPPORT_LINKS
1342                 const char *symlink_name;
1343                 int symlink_len;
1344 #ifdef ICONV_OPTION
1345                 char symlink_buf[MAXPATHLEN];
1346 #endif
1347 #endif
1348 #if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
1349                 stat_x sx;
1350 #endif
1351
1352 #ifdef SUPPORT_LINKS
1353                 if (preserve_links && S_ISLNK(file->mode)) {
1354                         symlink_name = F_SYMLINK(file);
1355                         symlink_len = strlen(symlink_name);
1356                         if (symlink_len == 0) {
1357                                 io_error |= IOERR_GENERAL;
1358                                 f_name(file, fbuf);
1359                                 rprintf(FERROR_XFER,
1360                                     "skipping symlink with 0-length value: %s\n",
1361                                     full_fname(fbuf));
1362                                 return NULL;
1363                         }
1364                 } else {
1365                         symlink_name = NULL;
1366                         symlink_len = 0;
1367                 }
1368 #endif
1369
1370 #ifdef ICONV_OPTION
1371                 if (ic_send != (iconv_t)-1) {
1372                         xbuf outbuf, inbuf;
1373
1374                         INIT_CONST_XBUF(outbuf, fbuf);
1375
1376                         if (file->dirname) {
1377                                 INIT_XBUF_STRLEN(inbuf, (char*)file->dirname);
1378                                 outbuf.size -= 2; /* Reserve room for '/' & 1 more char. */
1379                                 if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0)
1380                                         goto convert_error;
1381                                 outbuf.size += 2;
1382                                 fbuf[outbuf.len++] = '/';
1383                         }
1384
1385                         INIT_XBUF_STRLEN(inbuf, (char*)file->basename);
1386                         if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0) {
1387                           convert_error:
1388                                 io_error |= IOERR_GENERAL;
1389                                 rprintf(FERROR_XFER,
1390                                     "[%s] cannot convert filename: %s (%s)\n",
1391                                     who_am_i(), f_name(file, fbuf), strerror(errno));
1392                                 return NULL;
1393                         }
1394                         fbuf[outbuf.len] = '\0';
1395
1396 #ifdef SUPPORT_LINKS
1397                         if (symlink_len && sender_symlink_iconv) {
1398                                 INIT_XBUF(inbuf, (char*)symlink_name, symlink_len, (size_t)-1);
1399                                 INIT_CONST_XBUF(outbuf, symlink_buf);
1400                                 if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0) {
1401                                         io_error |= IOERR_GENERAL;
1402                                         f_name(file, fbuf);
1403                                         rprintf(FERROR_XFER,
1404                                             "[%s] cannot convert symlink data for: %s (%s)\n",
1405                                             who_am_i(), full_fname(fbuf), strerror(errno));
1406                                         return NULL;
1407                                 }
1408                                 symlink_buf[outbuf.len] = '\0';
1409
1410                                 symlink_name = symlink_buf;
1411                                 symlink_len = outbuf.len;
1412                         }
1413 #endif
1414                 } else
1415 #endif
1416                         f_name(file, fbuf);
1417
1418 #ifdef SUPPORT_ACLS
1419                 if (preserve_acls && !S_ISLNK(file->mode)) {
1420                         sx.st.st_mode = file->mode;
1421                         sx.acc_acl = sx.def_acl = NULL;
1422                         if (get_acl(fname, &sx) < 0) {
1423                                 io_error |= IOERR_GENERAL;
1424                                 return NULL;
1425                         }
1426                 }
1427 #endif
1428 #ifdef SUPPORT_XATTRS
1429                 if (preserve_xattrs) {
1430                         sx.xattr = NULL;
1431                         if (get_xattr(fname, &sx) < 0) {
1432                                 io_error |= IOERR_GENERAL;
1433                                 return NULL;
1434                         }
1435                 }
1436 #endif
1437
1438                 send_file_entry(f, fbuf, file,
1439 #ifdef SUPPORT_LINKS
1440                                 symlink_name, symlink_len,
1441 #endif
1442                                 flist->used, flist->ndx_start);
1443
1444 #ifdef SUPPORT_ACLS
1445                 if (preserve_acls && !S_ISLNK(file->mode)) {
1446                         send_acl(&sx, f);
1447                         free_acl(&sx);
1448                 }
1449 #endif
1450 #ifdef SUPPORT_XATTRS
1451                 if (preserve_xattrs) {
1452                         F_XATTR(file) = send_xattr(&sx, f);
1453                         free_xattr(&sx);
1454                 }
1455 #endif
1456         }
1457
1458         maybe_emit_filelist_progress(flist->used + flist_count_offset);
1459
1460         flist_expand(flist, 1);
1461         flist->files[flist->used++] = file;
1462
1463         return file;
1464 }
1465
1466 static void send_if_directory(int f, struct file_list *flist,
1467                               struct file_struct *file,
1468                               char *fbuf, unsigned int ol,
1469                               int flags)
1470 {
1471         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1472
1473         if (S_ISDIR(file->mode)
1474             && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) {
1475                 void *save_filters;
1476                 unsigned int len = strlen(fbuf);
1477                 if (len > 1 && fbuf[len-1] == '/')
1478                         fbuf[--len] = '\0';
1479                 save_filters = push_local_filters(fbuf, len);
1480                 send_directory(f, flist, fbuf, len, flags);
1481                 pop_local_filters(save_filters);
1482                 fbuf[ol] = '\0';
1483                 if (is_dot_dir)
1484                         fbuf[ol-1] = '.';
1485         }
1486 }
1487
1488 static int file_compare(const void *file1, const void *file2)
1489 {
1490         return f_name_cmp(*(struct file_struct **)file1,
1491                           *(struct file_struct **)file2);
1492 }
1493
1494 /* The guts of a merge-sort algorithm.  This was derived from the glibc
1495  * version, but I (Wayne) changed the merge code to do less copying and
1496  * to require only half the amount of temporary memory. */
1497 static void fsort_tmp(struct file_struct **fp, size_t num,
1498                       struct file_struct **tmp)
1499 {
1500         struct file_struct **f1, **f2, **t;
1501         size_t n1, n2;
1502
1503         n1 = num / 2;
1504         n2 = num - n1;
1505         f1 = fp;
1506         f2 = fp + n1;
1507
1508         if (n1 > 1)
1509                 fsort_tmp(f1, n1, tmp);
1510         if (n2 > 1)
1511                 fsort_tmp(f2, n2, tmp);
1512
1513         while (f_name_cmp(*f1, *f2) <= 0) {
1514                 if (!--n1)
1515                         return;
1516                 f1++;
1517         }
1518
1519         t = tmp;
1520         memcpy(t, f1, n1 * PTR_SIZE);
1521
1522         *f1++ = *f2++, n2--;
1523
1524         while (n1 > 0 && n2 > 0) {
1525                 if (f_name_cmp(*t, *f2) <= 0)
1526                         *f1++ = *t++, n1--;
1527                 else
1528                         *f1++ = *f2++, n2--;
1529         }
1530
1531         if (n1 > 0)
1532                 memcpy(f1, t, n1 * PTR_SIZE);
1533 }
1534
1535 /* This file-struct sorting routine makes sure that any identical names in
1536  * the file list stay in the same order as they were in the original list.
1537  * This is particularly vital in inc_recurse mode where we expect a sort
1538  * on the flist to match the exact order of a sort on the dir_flist. */
1539 static void fsort(struct file_struct **fp, size_t num)
1540 {
1541         if (num <= 1)
1542                 return;
1543
1544         if (use_qsort)
1545                 qsort(fp, num, PTR_SIZE, file_compare);
1546         else {
1547                 struct file_struct **tmp = new_array(struct file_struct *,
1548                                                      (num+1) / 2);
1549                 fsort_tmp(fp, num, tmp);
1550                 free(tmp);
1551         }
1552 }
1553
1554 /* We take an entire set of sibling dirs from the sorted flist and link them
1555  * into the tree, setting the appropriate parent/child/sibling pointers. */
1556 static void add_dirs_to_tree(int parent_ndx, struct file_list *from_flist,
1557                              int dir_cnt)
1558 {
1559         int i;
1560         int32 *dp = NULL;
1561         int32 *parent_dp = parent_ndx < 0 ? NULL
1562                          : F_DIR_NODE_P(dir_flist->sorted[parent_ndx]);
1563
1564         flist_expand(dir_flist, dir_cnt);
1565         dir_flist->sorted = dir_flist->files;
1566
1567         for (i = 0; dir_cnt; i++) {
1568                 struct file_struct *file = from_flist->sorted[i];
1569
1570                 if (!S_ISDIR(file->mode))
1571                         continue;
1572
1573                 dir_flist->files[dir_flist->used++] = file;
1574                 dir_cnt--;
1575
1576                 if (file->basename[0] == '.' && file->basename[1] == '\0')
1577                         continue;
1578
1579                 if (dp)
1580                         DIR_NEXT_SIBLING(dp) = dir_flist->used - 1;
1581                 else if (parent_dp)
1582                         DIR_FIRST_CHILD(parent_dp) = dir_flist->used - 1;
1583                 else
1584                         send_dir_ndx = dir_flist->used - 1;
1585
1586                 dp = F_DIR_NODE_P(file);
1587                 DIR_PARENT(dp) = parent_ndx;
1588                 DIR_FIRST_CHILD(dp) = -1;
1589         }
1590         if (dp)
1591                 DIR_NEXT_SIBLING(dp) = -1;
1592 }
1593
1594 static void interpret_stat_error(const char *fname, int is_dir)
1595 {
1596         if (errno == ENOENT) {
1597                 io_error |= IOERR_VANISHED;
1598                 rprintf(FWARNING, "%s has vanished: %s\n",
1599                         is_dir ? "directory" : "file", full_fname(fname));
1600         } else {
1601                 io_error |= IOERR_GENERAL;
1602                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1603                         full_fname(fname));
1604         }
1605 }
1606
1607 /* This function is normally called by the sender, but the receiving side also
1608  * calls it from get_dirlist() with f set to -1 so that we just construct the
1609  * file list in memory without sending it over the wire.  Also, get_dirlist()
1610  * might call this with f set to -2, which also indicates that local filter
1611  * rules should be ignored. */
1612 static void send_directory(int f, struct file_list *flist, char *fbuf, int len,
1613                            int flags)
1614 {
1615         struct dirent *di;
1616         unsigned remainder;
1617         char *p;
1618         DIR *d;
1619         int divert_dirs = (flags & FLAG_DIVERT_DIRS) != 0;
1620         int start = flist->used;
1621         int filter_level = f == -2 ? SERVER_FILTERS : ALL_FILTERS;
1622
1623         assert(flist != NULL);
1624
1625         if (!(d = opendir(fbuf))) {
1626                 if (errno == ENOENT) {
1627                         if (am_sender) /* Can abuse this for vanished error w/ENOENT: */
1628                                 interpret_stat_error(fbuf, True);
1629                         return;
1630                 }
1631                 io_error |= IOERR_GENERAL;
1632                 rsyserr(FERROR_XFER, errno, "opendir %s failed", full_fname(fbuf));
1633                 return;
1634         }
1635
1636         p = fbuf + len;
1637         if (len == 1 && *fbuf == '/')
1638                 remainder = MAXPATHLEN - 1;
1639         else if (len < MAXPATHLEN-1) {
1640                 *p++ = '/';
1641                 *p = '\0';
1642                 remainder = MAXPATHLEN - (len + 1);
1643         } else
1644                 remainder = 0;
1645
1646         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1647                 char *dname = d_name(di);
1648                 if (dname[0] == '.' && (dname[1] == '\0'
1649                     || (dname[1] == '.' && dname[2] == '\0')))
1650                         continue;
1651                 unsigned name_len = strlcpy(p, dname, remainder);
1652                 if (name_len >= remainder) {
1653                         char save = fbuf[len];
1654                         fbuf[len] = '\0';
1655                         io_error |= IOERR_GENERAL;
1656                         rprintf(FERROR_XFER,
1657                                 "filename overflows max-path len by %u: %s/%s\n",
1658                                 name_len - remainder + 1, fbuf, dname);
1659                         fbuf[len] = save;
1660                         continue;
1661                 }
1662                 if (dname[0] == '\0') {
1663                         io_error |= IOERR_GENERAL;
1664                         rprintf(FERROR_XFER,
1665                                 "cannot send file with empty name in %s\n",
1666                                 full_fname(fbuf));
1667                         continue;
1668                 }
1669
1670                 send_file_name(f, flist, fbuf, NULL, flags, filter_level);
1671         }
1672
1673         fbuf[len] = '\0';
1674
1675         if (errno) {
1676                 io_error |= IOERR_GENERAL;
1677                 rsyserr(FERROR_XFER, errno, "readdir(%s)", full_fname(fbuf));
1678         }
1679
1680         closedir(d);
1681
1682         if (f >= 0 && recurse && !divert_dirs) {
1683                 int i, end = flist->used - 1;
1684                 /* send_if_directory() bumps flist->used, so use "end". */
1685                 for (i = start; i <= end; i++)
1686                         send_if_directory(f, flist, flist->files[i], fbuf, len, flags);
1687         }
1688 }
1689
1690 static void send_implied_dirs(int f, struct file_list *flist, char *fname,
1691                               char *start, char *limit, int flags, char name_type)
1692 {
1693         static char lastpath[MAXPATHLEN] = "";
1694         static int lastpath_len = 0;
1695         static struct file_struct *lastpath_struct = NULL;
1696         struct file_struct *file;
1697         item_list *relname_list;
1698         relnamecache **rnpp;
1699         int len, need_new_dir, depth = 0;
1700         struct filter_list_struct save_filter_list = filter_list;
1701
1702         flags = (flags | FLAG_IMPLIED_DIR) & ~(FLAG_TOP_DIR | FLAG_CONTENT_DIR);
1703         filter_list.head = filter_list.tail = NULL; /* Don't filter implied dirs. */
1704
1705         if (inc_recurse) {
1706                 if (lastpath_struct && F_PATHNAME(lastpath_struct) == pathname
1707                  && lastpath_len == limit - fname
1708                  && strncmp(lastpath, fname, lastpath_len) == 0)
1709                         need_new_dir = 0;
1710                 else
1711                         need_new_dir = 1;
1712         } else {
1713                 char *tp = fname, *lp = lastpath;
1714                 /* Skip any initial directories in our path that we
1715                  * have in common with lastpath. */
1716                 assert(start == fname);
1717                 for ( ; ; tp++, lp++) {
1718                         if (tp == limit) {
1719                                 if (*lp == '/' || *lp == '\0')
1720                                         goto done;
1721                                 break;
1722                         }
1723                         if (*lp != *tp)
1724                                 break;
1725                         if (*tp == '/') {
1726                                 start = tp;
1727                                 depth++;
1728                         }
1729                 }
1730                 need_new_dir = 1;
1731         }
1732
1733         if (need_new_dir) {
1734                 int save_copy_links = copy_links;
1735                 int save_xfer_dirs = xfer_dirs;
1736                 char *slash;
1737
1738                 copy_links = xfer_dirs = 1;
1739
1740                 *limit = '\0';
1741
1742                 for (slash = start; (slash = strchr(slash+1, '/')) != NULL; ) {
1743                         *slash = '\0';
1744                         file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1745                         depth++;
1746                         if (!inc_recurse && file && S_ISDIR(file->mode))
1747                                 change_local_filter_dir(fname, strlen(fname), depth);
1748                         *slash = '/';
1749                 }
1750
1751                 file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1752                 if (inc_recurse) {
1753                         if (file && !S_ISDIR(file->mode))
1754                                 file = NULL;
1755                         lastpath_struct = file;
1756                 } else if (file && S_ISDIR(file->mode))
1757                         change_local_filter_dir(fname, strlen(fname), ++depth);
1758
1759                 strlcpy(lastpath, fname, sizeof lastpath);
1760                 lastpath_len = limit - fname;
1761
1762                 *limit = '/';
1763
1764                 copy_links = save_copy_links;
1765                 xfer_dirs = save_xfer_dirs;
1766
1767                 if (!inc_recurse)
1768                         goto done;
1769         }
1770
1771         if (!lastpath_struct)
1772                 goto done; /* dir must have vanished */
1773
1774         len = strlen(limit+1);
1775         memcpy(&relname_list, F_DIR_RELNAMES_P(lastpath_struct), sizeof relname_list);
1776         if (!relname_list) {
1777                 if (!(relname_list = new0(item_list)))
1778                         out_of_memory("send_implied_dirs");
1779                 memcpy(F_DIR_RELNAMES_P(lastpath_struct), &relname_list, sizeof relname_list);
1780         }
1781         rnpp = EXPAND_ITEM_LIST(relname_list, relnamecache *, 32);
1782         if (!(*rnpp = (relnamecache*)new_array(char, sizeof (relnamecache) + len)))
1783                 out_of_memory("send_implied_dirs");
1784         (*rnpp)->name_type = name_type;
1785         strlcpy((*rnpp)->fname, limit+1, len + 1);
1786
1787 done:
1788         filter_list = save_filter_list;
1789 }
1790
1791 static NORETURN void fatal_unsafe_io_error(void)
1792 {
1793         /* This (sadly) can only happen when pushing data because
1794          * the sender does not know about what kind of delete
1795          * is in effect on the receiving side when pulling. */
1796         rprintf(FERROR_XFER, "FATAL I/O ERROR: dying to avoid a --delete-during issue with a pre-3.0.7 receiver.\n");
1797         exit_cleanup(RERR_UNSUPPORTED);
1798 }
1799
1800 static void send1extra(int f, struct file_struct *file, struct file_list *flist)
1801 {
1802         char fbuf[MAXPATHLEN];
1803         item_list *relname_list;
1804         int len, dlen, flags = FLAG_DIVERT_DIRS | FLAG_CONTENT_DIR;
1805         size_t j;
1806
1807         f_name(file, fbuf);
1808         dlen = strlen(fbuf);
1809
1810         if (!change_pathname(file, NULL, 0))
1811                 exit_cleanup(RERR_FILESELECT);
1812
1813         change_local_filter_dir(fbuf, dlen, send_dir_depth);
1814
1815         if (file->flags & FLAG_CONTENT_DIR) {
1816                 if (one_file_system) {
1817                         STRUCT_STAT st;
1818                         if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1819                                 interpret_stat_error(fbuf, True);
1820                                 return;
1821                         }
1822                         filesystem_dev = st.st_dev;
1823                 }
1824                 send_directory(f, flist, fbuf, dlen, flags);
1825         }
1826
1827         if (!relative_paths)
1828                 return;
1829
1830         memcpy(&relname_list, F_DIR_RELNAMES_P(file), sizeof relname_list);
1831         if (!relname_list)
1832                 return;
1833
1834         for (j = 0; j < relname_list->count; j++) {
1835                 char *slash;
1836                 relnamecache *rnp = ((relnamecache**)relname_list->items)[j];
1837                 char name_type = rnp->name_type;
1838
1839                 fbuf[dlen] = '/';
1840                 len = strlcpy(fbuf + dlen + 1, rnp->fname, sizeof fbuf - dlen - 1);
1841                 free(rnp);
1842                 if (len >= (int)sizeof fbuf)
1843                         continue; /* Impossible... */
1844
1845                 slash = strchr(fbuf+dlen+1, '/');
1846                 if (slash) {
1847                         send_implied_dirs(f, flist, fbuf, fbuf+dlen+1, slash, flags, name_type);
1848                         continue;
1849                 }
1850
1851                 if (name_type != NORMAL_NAME) {
1852                         STRUCT_STAT st;
1853                         if (link_stat(fbuf, &st, 1) != 0) {
1854                                 interpret_stat_error(fbuf, True);
1855                                 continue;
1856                         }
1857                         send_file_name(f, flist, fbuf, &st, FLAG_TOP_DIR | flags, ALL_FILTERS);
1858                 } else
1859                         send_file_name(f, flist, fbuf, NULL, FLAG_TOP_DIR | flags, ALL_FILTERS);
1860         }
1861
1862         free(relname_list);
1863 }
1864
1865 void send_extra_file_list(int f, int at_least)
1866 {
1867         struct file_list *flist;
1868         int64 start_write;
1869         uint16 prev_flags;
1870         int old_cnt, save_io_error = io_error;
1871
1872         if (flist_eof)
1873                 return;
1874
1875         /* Keep sending data until we have the requested number of
1876          * files in the upcoming file-lists. */
1877         old_cnt = cur_flist->used;
1878         for (flist = first_flist; flist != cur_flist; flist = flist->next)
1879                 old_cnt += flist->used;
1880         while (file_total - old_cnt < at_least) {
1881                 struct file_struct *file = dir_flist->sorted[send_dir_ndx];
1882                 int dir_ndx, dstart = dir_count;
1883                 const char *pathname = F_PATHNAME(file);
1884                 int32 *dp;
1885
1886                 flist = flist_new(0, "send_extra_file_list");
1887                 start_write = stats.total_written;
1888
1889                 if (unsort_ndx)
1890                         dir_ndx = F_NDX(file);
1891                 else
1892                         dir_ndx = send_dir_ndx;
1893                 write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
1894                 flist->parent_ndx = dir_ndx;
1895
1896                 send1extra(f, file, flist);
1897                 prev_flags = file->flags;
1898                 dp = F_DIR_NODE_P(file);
1899
1900                 /* If there are any duplicate directory names that follow, we
1901                  * send all the dirs together in one file-list.  The dir_flist
1902                  * tree links all the child subdirs onto the last dup dir. */
1903                 while ((dir_ndx = DIR_NEXT_SIBLING(dp)) >= 0
1904                     && dir_flist->sorted[dir_ndx]->flags & FLAG_DUPLICATE) {
1905                         send_dir_ndx = dir_ndx;
1906                         file = dir_flist->sorted[dir_ndx];
1907                         /* Try to avoid some duplicate scanning of identical dirs. */
1908                         if (F_PATHNAME(file) == pathname && prev_flags & FLAG_CONTENT_DIR)
1909                                 file->flags &= ~FLAG_CONTENT_DIR;
1910                         send1extra(f, file, flist);
1911                         prev_flags = file->flags;
1912                         dp = F_DIR_NODE_P(file);
1913                 }
1914
1915                 if (io_error == save_io_error || ignore_errors)
1916                         write_byte(f, 0);
1917                 else if (use_safe_inc_flist) {
1918                         write_shortint(f, XMIT_EXTENDED_FLAGS|XMIT_IO_ERROR_ENDLIST);
1919                         write_varint(f, io_error);
1920                 } else {
1921                         if (delete_during)
1922                                 fatal_unsafe_io_error();
1923                         write_byte(f, 0);
1924                 }
1925
1926                 if (need_unsorted_flist) {
1927                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
1928                                 out_of_memory("send_extra_file_list");
1929                         memcpy(flist->sorted, flist->files,
1930                                flist->used * sizeof (struct file_struct*));
1931                 } else
1932                         flist->sorted = flist->files;
1933
1934                 flist_sort_and_clean(flist, 0);
1935
1936                 add_dirs_to_tree(send_dir_ndx, flist, dir_count - dstart);
1937                 flist_done_allocating(flist);
1938
1939                 file_total += flist->used;
1940                 stats.flist_size += stats.total_written - start_write;
1941                 stats.num_files += flist->used;
1942                 if (verbose > 3)
1943                         output_flist(flist);
1944
1945                 if (DIR_FIRST_CHILD(dp) >= 0) {
1946                         send_dir_ndx = DIR_FIRST_CHILD(dp);
1947                         send_dir_depth++;
1948                 } else {
1949                         while (DIR_NEXT_SIBLING(dp) < 0) {
1950                                 if ((send_dir_ndx = DIR_PARENT(dp)) < 0) {
1951                                         write_ndx(f, NDX_FLIST_EOF);
1952                                         flist_eof = 1;
1953                                         change_local_filter_dir(NULL, 0, 0);
1954                                         goto finish;
1955                                 }
1956                                 send_dir_depth--;
1957                                 file = dir_flist->sorted[send_dir_ndx];
1958                                 dp = F_DIR_NODE_P(file);
1959                         }
1960                         send_dir_ndx = DIR_NEXT_SIBLING(dp);
1961                 }
1962         }
1963
1964   finish:
1965         if (io_error != save_io_error && !ignore_errors)
1966                 send_msg_int(MSG_IO_ERROR, io_error);
1967 }
1968
1969 struct file_list *send_file_list(int f, int argc, char *argv[])
1970 {
1971         static const char *lastdir;
1972         static int lastdir_len = -1;
1973         int len, dirlen;
1974         STRUCT_STAT st;
1975         char *p, *dir;
1976         struct file_list *flist;
1977         struct timeval start_tv, end_tv;
1978         int64 start_write;
1979         int use_ff_fd = 0;
1980         int disable_buffering;
1981         int flags = recurse ? FLAG_CONTENT_DIR : 0;
1982         int reading_remotely = filesfrom_host != NULL;
1983         int rl_flags = (reading_remotely ? 0 : RL_DUMP_COMMENTS)
1984 #ifdef ICONV_OPTION
1985                      | (filesfrom_convert ? RL_CONVERT : 0)
1986 #endif
1987                      | (eol_nulls || reading_remotely ? RL_EOL_NULLS : 0);
1988         int implied_dot_dir = 0;
1989
1990         rprintf(FLOG, "building file list\n");
1991         if (show_filelist_p())
1992                 start_filelist_progress("building file list");
1993         else if (inc_recurse && verbose && !am_server)
1994                 rprintf(FCLIENT, "sending incremental file list\n");
1995
1996         start_write = stats.total_written;
1997         gettimeofday(&start_tv, NULL);
1998
1999         if (relative_paths && protocol_version >= 30)
2000                 implied_dirs = 1; /* We send flagged implied dirs */
2001
2002 #ifdef SUPPORT_HARD_LINKS
2003         if (preserve_hard_links && protocol_version >= 30 && !cur_flist)
2004                 init_hard_links();
2005 #endif
2006
2007         flist = cur_flist = flist_new(0, "send_file_list");
2008         if (inc_recurse) {
2009                 dir_flist = flist_new(FLIST_TEMP, "send_file_list");
2010                 flags |= FLAG_DIVERT_DIRS;
2011         } else
2012                 dir_flist = cur_flist;
2013
2014         disable_buffering = io_start_buffering_out(f);
2015         if (filesfrom_fd >= 0) {
2016                 if (argv[0] && !change_dir(argv[0], CD_NORMAL)) {
2017                         rsyserr(FERROR_XFER, errno, "change_dir %s failed",
2018                                 full_fname(argv[0]));
2019                         exit_cleanup(RERR_FILESELECT);
2020                 }
2021                 use_ff_fd = 1;
2022         }
2023
2024         if (!orig_dir)
2025                 orig_dir = strdup(curr_dir);
2026
2027         while (1) {
2028                 char fbuf[MAXPATHLEN], *fn, name_type;
2029
2030                 if (use_ff_fd) {
2031                         if (read_line(filesfrom_fd, fbuf, sizeof fbuf, rl_flags) == 0)
2032                                 break;
2033                         sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
2034                 } else {
2035                         if (argc-- == 0)
2036                                 break;
2037                         strlcpy(fbuf, *argv++, MAXPATHLEN);
2038                         if (sanitize_paths)
2039                                 sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
2040                 }
2041
2042                 len = strlen(fbuf);
2043                 if (relative_paths) {
2044                         /* We clean up fbuf below. */
2045                         name_type = NORMAL_NAME;
2046                 } else if (!len || fbuf[len - 1] == '/') {
2047                         if (len == 2 && fbuf[0] == '.') {
2048                                 /* Turn "./" into just "." rather than "./." */
2049                                 fbuf[--len] = '\0';
2050                         } else {
2051                                 if (len + 1 >= MAXPATHLEN)
2052                                         overflow_exit("send_file_list");
2053                                 fbuf[len++] = '.';
2054                                 fbuf[len] = '\0';
2055                         }
2056                         name_type = DOTDIR_NAME;
2057                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
2058                     && (len == 2 || fbuf[len-3] == '/')) {
2059                         if (len + 2 >= MAXPATHLEN)
2060                                 overflow_exit("send_file_list");
2061                         fbuf[len++] = '/';
2062                         fbuf[len++] = '.';
2063                         fbuf[len] = '\0';
2064                         name_type = DOTDIR_NAME;
2065                 } else if (fbuf[len-1] == '.' && (len == 1 || fbuf[len-2] == '/'))
2066                         name_type = DOTDIR_NAME;
2067                 else
2068                         name_type = NORMAL_NAME;
2069
2070                 dir = NULL;
2071
2072                 if (!relative_paths) {
2073                         p = strrchr(fbuf, '/');
2074                         if (p) {
2075                                 *p = '\0';
2076                                 if (p == fbuf)
2077                                         dir = "/";
2078                                 else
2079                                         dir = fbuf;
2080                                 len -= p - fbuf + 1;
2081                                 fn = p + 1;
2082                         } else
2083                                 fn = fbuf;
2084                 } else {
2085                         if ((p = strstr(fbuf, "/./")) != NULL) {
2086                                 *p = '\0';
2087                                 if (p == fbuf)
2088                                         dir = "/";
2089                                 else {
2090                                         dir = fbuf;
2091                                         clean_fname(dir, 0);
2092                                 }
2093                                 fn = p + 3;
2094                                 while (*fn == '/')
2095                                         fn++;
2096                                 if (!*fn)
2097                                         *--fn = '\0'; /* ensure room for '.' */
2098                         } else
2099                                 fn = fbuf;
2100                         /* A leading ./ can be used in relative mode to affect
2101                          * the dest dir without its name being in the path. */
2102                         if (*fn == '.' && fn[1] == '/' && !implied_dot_dir) {
2103                                 send_file_name(f, flist, ".", NULL,
2104                                     (flags | FLAG_IMPLIED_DIR) & ~FLAG_CONTENT_DIR,
2105                                     ALL_FILTERS);
2106                                 implied_dot_dir = 1;
2107                         }
2108                         len = clean_fname(fn, CFN_KEEP_TRAILING_SLASH
2109                                             | CFN_DROP_TRAILING_DOT_DIR);
2110                         if (len == 1) {
2111                                 if (fn[0] == '/') {
2112                                         fn = "/.";
2113                                         len = 2;
2114                                         name_type = DOTDIR_NAME;
2115                                 } else if (fn[0] == '.')
2116                                         name_type = DOTDIR_NAME;
2117                         } else if (fn[len-1] == '/') {
2118                                 fn[--len] = '\0';
2119                                 if (len == 1 && *fn == '.')
2120                                         name_type = DOTDIR_NAME;
2121                                 else
2122                                         name_type = SLASH_ENDING_NAME;
2123                         }
2124                         /* Reject a ".." dir in the active part of the path. */
2125                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
2126                                 if ((p[2] == '/' || p[2] == '\0')
2127                                  && (p == fn || p[-1] == '/')) {
2128                                         rprintf(FERROR,
2129                                             "found \"..\" dir in relative path: %s\n",
2130                                             fn);
2131                                         exit_cleanup(RERR_SYNTAX);
2132                                 }
2133                         }
2134                 }
2135
2136                 if (!*fn) {
2137                         len = 1;
2138                         fn = ".";
2139                         name_type = DOTDIR_NAME;
2140                 }
2141
2142                 dirlen = dir ? strlen(dir) : 0;
2143                 if (dirlen != lastdir_len || memcmp(lastdir, dir, dirlen) != 0) {
2144                         if (!change_pathname(NULL, dir, -dirlen))
2145                                 continue;
2146                         lastdir = pathname;
2147                         lastdir_len = pathname_len;
2148                 } else if (!change_pathname(NULL, lastdir, lastdir_len))
2149                         continue;
2150
2151                 if (fn != fbuf)
2152                         memmove(fbuf, fn, len + 1);
2153
2154                 if (link_stat(fbuf, &st, copy_dirlinks || name_type != NORMAL_NAME) != 0
2155                  || (name_type != DOTDIR_NAME && is_daemon_excluded(fbuf, S_ISDIR(st.st_mode)))
2156                  || (relative_paths && path_is_daemon_excluded(fbuf, 1))) {
2157                         io_error |= IOERR_GENERAL;
2158                         rsyserr(FERROR_XFER, errno, "link_stat %s failed",
2159                                 full_fname(fbuf));
2160                         continue;
2161                 }
2162
2163                 /* A dot-dir should not be excluded! */
2164                 if (name_type != DOTDIR_NAME
2165                  && is_excluded(fbuf, S_ISDIR(st.st_mode) != 0, ALL_FILTERS))
2166                         continue;
2167
2168                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
2169                         rprintf(FINFO, "skipping directory %s\n", fbuf);
2170                         continue;
2171                 }
2172
2173                 if (inc_recurse && relative_paths && *fbuf) {
2174                         if ((p = strchr(fbuf+1, '/')) != NULL) {
2175                                 if (p - fbuf == 1 && *fbuf == '.') {
2176                                         if ((fn = strchr(p+1, '/')) != NULL)
2177                                                 p = fn;
2178                                 } else
2179                                         fn = p;
2180                                 send_implied_dirs(f, flist, fbuf, fbuf, p, flags, name_type);
2181                                 if (fn == p)
2182                                         continue;
2183                         }
2184                 } else if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
2185                         /* Send the implied directories at the start of the
2186                          * source spec, so we get their permissions right. */
2187                         send_implied_dirs(f, flist, fbuf, fbuf, p, flags, 0);
2188                 }
2189
2190                 if (one_file_system)
2191                         filesystem_dev = st.st_dev;
2192
2193                 if (recurse || (xfer_dirs && name_type != NORMAL_NAME)) {
2194                         struct file_struct *file;
2195                         file = send_file_name(f, flist, fbuf, &st,
2196                                               FLAG_TOP_DIR | FLAG_CONTENT_DIR | flags,
2197                                               NO_FILTERS);
2198                         if (!file)
2199                                 continue;
2200                         if (inc_recurse) {
2201                                 if (name_type == DOTDIR_NAME) {
2202                                         if (send_dir_depth < 0) {
2203                                                 send_dir_depth = 0;
2204                                                 change_local_filter_dir(fbuf, len, send_dir_depth);
2205                                         }
2206                                         send_directory(f, flist, fbuf, len, flags);
2207                                 }
2208                         } else
2209                                 send_if_directory(f, flist, file, fbuf, len, flags);
2210                 } else
2211                         send_file_name(f, flist, fbuf, &st, flags, NO_FILTERS);
2212         }
2213
2214         gettimeofday(&end_tv, NULL);
2215         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2216                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2217         if (stats.flist_buildtime == 0)
2218                 stats.flist_buildtime = 1;
2219         start_tv = end_tv;
2220
2221         /* Indicate end of file list */
2222         if (io_error == 0 || ignore_errors)
2223                 write_byte(f, 0);
2224         else if (use_safe_inc_flist) {
2225                 write_shortint(f, XMIT_EXTENDED_FLAGS|XMIT_IO_ERROR_ENDLIST);
2226                 write_varint(f, io_error);
2227         } else {
2228                 if (delete_during && inc_recurse)
2229                         fatal_unsafe_io_error();
2230                 write_byte(f, 0);
2231         }
2232
2233 #ifdef SUPPORT_HARD_LINKS
2234         if (preserve_hard_links && protocol_version >= 30 && !inc_recurse)
2235                 idev_destroy();
2236 #endif
2237
2238         if (show_filelist_p())
2239                 finish_filelist_progress(flist);
2240
2241         gettimeofday(&end_tv, NULL);
2242         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2243                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2244
2245         /* When converting names, both sides keep an unsorted file-list array
2246          * because the names will differ on the sending and receiving sides
2247          * (both sides will use the unsorted index number for each item). */
2248
2249         /* Sort the list without removing any duplicates.  This allows the
2250          * receiving side to ask for whatever name it kept.  For incremental
2251          * recursion mode, the sender marks duplicate dirs so that it can
2252          * send them together in a single file-list. */
2253         if (need_unsorted_flist) {
2254                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2255                         out_of_memory("send_file_list");
2256                 memcpy(flist->sorted, flist->files,
2257                        flist->used * sizeof (struct file_struct*));
2258         } else
2259                 flist->sorted = flist->files;
2260         flist_sort_and_clean(flist, 0);
2261         file_total += flist->used;
2262
2263         if (numeric_ids <= 0 && !inc_recurse)
2264                 send_id_list(f);
2265
2266         set_msg_fd_in(-1);
2267
2268         /* send the io_error flag */
2269         if (protocol_version < 30)
2270                 write_int(f, ignore_errors ? 0 : io_error);
2271         else if (!use_safe_inc_flist && io_error && !ignore_errors)
2272                 send_msg_int(MSG_IO_ERROR, io_error);
2273
2274         if (disable_buffering)
2275                 io_end_buffering_out();
2276
2277         stats.flist_size = stats.total_written - start_write;
2278         stats.num_files = flist->used;
2279
2280         if (verbose > 3)
2281                 output_flist(flist);
2282
2283         if (verbose > 2)
2284                 rprintf(FINFO, "send_file_list done\n");
2285
2286         if (inc_recurse) {
2287                 send_dir_depth = 1;
2288                 add_dirs_to_tree(-1, flist, dir_count);
2289                 if (!file_total || strcmp(flist->sorted[flist->low]->basename, ".") != 0)
2290                         flist->parent_ndx = -1;
2291                 flist_done_allocating(flist);
2292                 if (send_dir_ndx < 0) {
2293                         write_ndx(f, NDX_FLIST_EOF);
2294                         flist_eof = 1;
2295                 }
2296                 else if (file_total == 1) {
2297                         /* If we're creating incremental file-lists and there
2298                          * was just 1 item in the first file-list, send 1 more
2299                          * file-list to check if this is a 1-file xfer. */
2300                         send_extra_file_list(f, 1);
2301                 }
2302         }
2303
2304         return flist;
2305 }
2306
2307 struct file_list *recv_file_list(int f)
2308 {
2309         struct file_list *flist;
2310         int dstart, flags;
2311         int64 start_read;
2312         int save_verbose = verbose;
2313
2314         if (!first_flist)
2315                 rprintf(FLOG, "receiving file list\n");
2316         if (show_filelist_p())
2317                 start_filelist_progress("receiving file list");
2318         else if (inc_recurse && verbose && !am_server && !first_flist)
2319                 rprintf(FCLIENT, "receiving incremental file list\n");
2320
2321         start_read = stats.total_read;
2322
2323 #ifdef SUPPORT_HARD_LINKS
2324         if (preserve_hard_links && !first_flist)
2325                 init_hard_links();
2326 #endif
2327
2328         flist = flist_new(0, "recv_file_list");
2329
2330         if (inc_recurse) {
2331                 if (flist->ndx_start == 1)
2332                         dir_flist = flist_new(FLIST_TEMP, "recv_file_list");
2333                 dstart = dir_flist->used;
2334         } else {
2335                 dir_flist = flist;
2336                 dstart = 0;
2337         }
2338
2339         if (am_server && verbose > 2)
2340                 verbose = 2;
2341         while ((flags = read_byte(f)) != 0) {
2342                 struct file_struct *file;
2343
2344                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
2345                         flags |= read_byte(f) << 8;
2346
2347                 if (flags == (XMIT_EXTENDED_FLAGS|XMIT_IO_ERROR_ENDLIST)) {
2348                         int err;
2349                         if (!use_safe_inc_flist) {
2350                                 rprintf(FERROR, "Invalid flist flag: %x\n", flags);
2351                                 exit_cleanup(RERR_PROTOCOL);
2352                         }
2353                         err = read_varint(f);
2354                         if (!ignore_errors)
2355                                 io_error |= err;
2356                         break;
2357                 }
2358
2359                 flist_expand(flist, 1);
2360                 file = recv_file_entry(flist, flags, f);
2361
2362                 if (inc_recurse && S_ISDIR(file->mode)) {
2363                         flist_expand(dir_flist, 1);
2364                         dir_flist->files[dir_flist->used++] = file;
2365                 }
2366
2367                 flist->files[flist->used++] = file;
2368
2369                 maybe_emit_filelist_progress(flist->used);
2370
2371                 if (verbose > 2) {
2372                         char *name = f_name(file, NULL);
2373                         rprintf(FINFO, "recv_file_name(%s)\n", NS(name));
2374                 }
2375         }
2376         file_total += flist->used;
2377         verbose = save_verbose;
2378
2379         if (verbose > 2)
2380                 rprintf(FINFO, "received %d names\n", flist->used);
2381
2382         if (show_filelist_p())
2383                 finish_filelist_progress(flist);
2384
2385         if (need_unsorted_flist) {
2386                 /* Create an extra array of index pointers that we can sort for
2387                  * the generator's use (for wading through the files in sorted
2388                  * order and for calling flist_find()).  We keep the "files"
2389                  * list unsorted for our exchange of index numbers with the
2390                  * other side (since their names may not sort the same). */
2391                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2392                         out_of_memory("recv_file_list");
2393                 memcpy(flist->sorted, flist->files,
2394                        flist->used * sizeof (struct file_struct*));
2395                 if (inc_recurse && dir_flist->used > dstart) {
2396                         static int dir_flist_malloced = 0;
2397                         if (dir_flist_malloced < dir_flist->malloced) {
2398                                 dir_flist->sorted = realloc_array(dir_flist->sorted,
2399                                                         struct file_struct *,
2400                                                         dir_flist->malloced);
2401                                 dir_flist_malloced = dir_flist->malloced;
2402                         }
2403                         memcpy(dir_flist->sorted + dstart, dir_flist->files + dstart,
2404                                (dir_flist->used - dstart) * sizeof (struct file_struct*));
2405                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2406                 }
2407         } else {
2408                 flist->sorted = flist->files;
2409                 if (inc_recurse && dir_flist->used > dstart) {
2410                         dir_flist->sorted = dir_flist->files;
2411                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2412                 }
2413         }
2414
2415         if (inc_recurse)
2416                 flist_done_allocating(flist);
2417         else if (f >= 0)
2418                 recv_id_list(f, flist);
2419
2420         flist_sort_and_clean(flist, relative_paths);
2421
2422         if (protocol_version < 30) {
2423                 /* Recv the io_error flag */
2424                 if (ignore_errors)
2425                         read_int(f);
2426                 else
2427                         io_error |= read_int(f);
2428         } else if (inc_recurse && flist->ndx_start == 1) {
2429                 if (!file_total || strcmp(flist->sorted[flist->low]->basename, ".") != 0)
2430                         flist->parent_ndx = -1;
2431         }
2432
2433         if (verbose > 3)
2434                 output_flist(flist);
2435
2436         if (verbose > 2)
2437                 rprintf(FINFO, "recv_file_list done\n");
2438
2439         stats.flist_size += stats.total_read - start_read;
2440         stats.num_files += flist->used;
2441
2442         return flist;
2443 }
2444
2445 /* This is only used once by the receiver if the very first file-list
2446  * has exactly one item in it. */
2447 void recv_additional_file_list(int f)
2448 {
2449         struct file_list *flist;
2450         int ndx = read_ndx(f);
2451         if (ndx == NDX_FLIST_EOF) {
2452                 flist_eof = 1;
2453                 change_local_filter_dir(NULL, 0, 0);
2454         } else {
2455                 ndx = NDX_FLIST_OFFSET - ndx;
2456                 if (ndx < 0 || ndx >= dir_flist->used) {
2457                         ndx = NDX_FLIST_OFFSET - ndx;
2458                         rprintf(FERROR,
2459                                 "[%s] Invalid dir index: %d (%d - %d)\n",
2460                                 who_am_i(), ndx, NDX_FLIST_OFFSET,
2461                                 NDX_FLIST_OFFSET - dir_flist->used + 1);
2462                         exit_cleanup(RERR_PROTOCOL);
2463                 }
2464                 if (verbose > 3) {
2465                         rprintf(FINFO, "[%s] receiving flist for dir %d\n",
2466                                 who_am_i(), ndx);
2467                 }
2468                 flist = recv_file_list(f);
2469                 flist->parent_ndx = ndx;
2470         }
2471 }
2472
2473 /* Search for an identically-named item in the file list.  Note that the
2474  * items must agree in their directory-ness, or no match is returned. */
2475 int flist_find(struct file_list *flist, struct file_struct *f)
2476 {
2477         int low = flist->low, high = flist->high;
2478         int diff, mid, mid_up;
2479
2480         while (low <= high) {
2481                 mid = (low + high) / 2;
2482                 if (F_IS_ACTIVE(flist->sorted[mid]))
2483                         mid_up = mid;
2484                 else {
2485                         /* Scan for the next non-empty entry using the cached
2486                          * distance values.  If the value isn't fully up-to-
2487                          * date, update it. */
2488                         mid_up = mid + F_DEPTH(flist->sorted[mid]);
2489                         if (!F_IS_ACTIVE(flist->sorted[mid_up])) {
2490                                 do {
2491                                     mid_up += F_DEPTH(flist->sorted[mid_up]);
2492                                 } while (!F_IS_ACTIVE(flist->sorted[mid_up]));
2493                                 F_DEPTH(flist->sorted[mid]) = mid_up - mid;
2494                         }
2495                         if (mid_up > high) {
2496                                 /* If there's nothing left above us, set high to
2497                                  * a non-empty entry below us and continue. */
2498                                 high = mid - (int)flist->sorted[mid]->len32;
2499                                 if (!F_IS_ACTIVE(flist->sorted[high])) {
2500                                         do {
2501                                             high -= (int)flist->sorted[high]->len32;
2502                                         } while (!F_IS_ACTIVE(flist->sorted[high]));
2503                                         flist->sorted[mid]->len32 = mid - high;
2504                                 }
2505                                 continue;
2506                         }
2507                 }
2508                 diff = f_name_cmp(flist->sorted[mid_up], f);
2509                 if (diff == 0) {
2510                         if (protocol_version < 29
2511                             && S_ISDIR(flist->sorted[mid_up]->mode)
2512                             != S_ISDIR(f->mode))
2513                                 return -1;
2514                         return mid_up;
2515                 }
2516                 if (diff < 0)
2517                         low = mid_up + 1;
2518                 else
2519                         high = mid - 1;
2520         }
2521         return -1;
2522 }
2523
2524 /* Search for an identically-named item in the file list.  Differs from
2525  * flist_find in that an item that agrees with "f" in directory-ness is
2526  * preferred but one that does not is still found. */
2527 int flist_find_ignore_dirness(struct file_list *flist, struct file_struct *f)
2528 {
2529         mode_t save_mode;
2530         int ndx;
2531
2532         /* First look for an item that agrees in directory-ness. */
2533         ndx = flist_find(flist, f);
2534         if (ndx >= 0)
2535                 return ndx;
2536
2537         /* Temporarily flip f->mode to look for an item of opposite
2538          * directory-ness. */
2539         save_mode = f->mode;
2540         f->mode = S_ISDIR(f->mode) ? S_IFREG : S_IFDIR;
2541         ndx = flist_find(flist, f);
2542         f->mode = save_mode;
2543         return ndx;
2544 }
2545
2546 /*
2547  * Free up any resources a file_struct has allocated
2548  * and clear the file.
2549  */
2550 void clear_file(struct file_struct *file)
2551 {
2552         /* The +1 zeros out the first char of the basename. */
2553         memset(file, 0, FILE_STRUCT_LEN + 1);
2554         /* In an empty entry, F_DEPTH() is an offset to the next non-empty
2555          * entry.  Likewise for len32 in the opposite direction.  We assume
2556          * that we're alone for now since flist_find() will adjust the counts
2557          * it runs into that aren't up-to-date. */
2558         file->len32 = F_DEPTH(file) = 1;
2559 }
2560
2561 /* Allocate a new file list. */
2562 struct file_list *flist_new(int flags, char *msg)
2563 {
2564         struct file_list *flist;
2565
2566         if (!(flist = new0(struct file_list)))
2567                 out_of_memory(msg);
2568
2569         if (flags & FLIST_TEMP) {
2570                 if (!(flist->file_pool = pool_create(SMALL_EXTENT, 0,
2571                                                 out_of_memory, POOL_INTERN)))
2572                         out_of_memory(msg);
2573         } else {
2574                 /* This is a doubly linked list with prev looping back to
2575                  * the end of the list, but the last next pointer is NULL. */
2576                 if (!first_flist) {
2577                         flist->file_pool = pool_create(NORMAL_EXTENT, 0,
2578                                                 out_of_memory, POOL_INTERN);
2579                         if (!flist->file_pool)
2580                                 out_of_memory(msg);
2581
2582                         flist->ndx_start = flist->flist_num = inc_recurse ? 1 : 0;
2583
2584                         first_flist = cur_flist = flist->prev = flist;
2585                 } else {
2586                         struct file_list *prev = first_flist->prev;
2587
2588                         flist->file_pool = first_flist->file_pool;
2589
2590                         flist->ndx_start = prev->ndx_start + prev->used + 1;
2591                         flist->flist_num = prev->flist_num + 1;
2592
2593                         flist->prev = prev;
2594                         prev->next = first_flist->prev = flist;
2595                 }
2596                 flist->pool_boundary = pool_boundary(flist->file_pool, 0);
2597                 flist_cnt++;
2598         }
2599
2600         return flist;
2601 }
2602
2603 /* Free up all elements in a flist. */
2604 void flist_free(struct file_list *flist)
2605 {
2606         if (!flist->prev) {
2607                 /* Was FLIST_TEMP dir-list. */
2608         } else if (flist == flist->prev) {
2609                 first_flist = cur_flist = NULL;
2610                 file_total = 0;
2611                 flist_cnt = 0;
2612         } else {
2613                 if (flist == cur_flist)
2614                         cur_flist = flist->next;
2615                 if (flist == first_flist)
2616                         first_flist = first_flist->next;
2617                 else {
2618                         flist->prev->next = flist->next;
2619                         if (!flist->next)
2620                                 flist->next = first_flist;
2621                 }
2622                 flist->next->prev = flist->prev;
2623                 file_total -= flist->used;
2624                 flist_cnt--;
2625         }
2626
2627         if (!flist->prev || !flist_cnt)
2628                 pool_destroy(flist->file_pool);
2629         else
2630                 pool_free_old(flist->file_pool, flist->pool_boundary);
2631
2632         if (flist->sorted && flist->sorted != flist->files)
2633                 free(flist->sorted);
2634         free(flist->files);
2635         free(flist);
2636 }
2637
2638 /* This routine ensures we don't have any duplicate names in our file list.
2639  * duplicate names can cause corruption because of the pipelining. */
2640 static void flist_sort_and_clean(struct file_list *flist, int strip_root)
2641 {
2642         char fbuf[MAXPATHLEN];
2643         int i, prev_i;
2644
2645         if (!flist)
2646                 return;
2647         if (flist->used == 0) {
2648                 flist->high = -1;
2649                 flist->low = 0;
2650                 return;
2651         }
2652
2653         fsort(flist->sorted, flist->used);
2654
2655         if (!am_sender || inc_recurse) {
2656                 for (i = prev_i = 0; i < flist->used; i++) {
2657                         if (F_IS_ACTIVE(flist->sorted[i])) {
2658                                 prev_i = i;
2659                                 break;
2660                         }
2661                 }
2662                 flist->low = prev_i;
2663         } else {
2664                 i = prev_i = flist->used - 1;
2665                 flist->low = 0;
2666         }
2667
2668         while (++i < flist->used) {
2669                 int j;
2670                 struct file_struct *file = flist->sorted[i];
2671
2672                 if (!F_IS_ACTIVE(file))
2673                         continue;
2674                 if (f_name_cmp(file, flist->sorted[prev_i]) == 0)
2675                         j = prev_i;
2676                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
2677                         int save_mode = file->mode;
2678                         /* Make sure that this directory doesn't duplicate a
2679                          * non-directory earlier in the list. */
2680                         flist->high = prev_i;
2681                         file->mode = S_IFREG;
2682                         j = flist_find(flist, file);
2683                         file->mode = save_mode;
2684                 } else
2685                         j = -1;
2686                 if (j >= 0) {
2687                         int keep, drop;
2688                         /* If one is a dir and the other is not, we want to
2689                          * keep the dir because it might have contents in the
2690                          * list.  Otherwise keep the first one. */
2691                         if (S_ISDIR(file->mode)) {
2692                                 struct file_struct *fp = flist->sorted[j];
2693                                 if (!S_ISDIR(fp->mode))
2694                                         keep = i, drop = j;
2695                                 else {
2696                                         if (am_sender)
2697                                                 file->flags |= FLAG_DUPLICATE;
2698                                         else { /* Make sure we merge our vital flags. */
2699                                                 fp->flags |= file->flags & (FLAG_TOP_DIR|FLAG_CONTENT_DIR);
2700                                                 fp->flags &= file->flags | ~FLAG_IMPLIED_DIR;
2701                                         }
2702                                         keep = j, drop = i;
2703                                 }
2704                         } else
2705                                 keep = j, drop = i;
2706
2707                         if (!am_sender) {
2708                                 if (verbose > 1) {
2709                                         rprintf(FINFO,
2710                                             "removing duplicate name %s from file list (%d)\n",
2711                                             f_name(file, fbuf), drop + flist->ndx_start);
2712                                 }
2713                                 clear_file(flist->sorted[drop]);
2714                         }
2715
2716                         if (keep == i) {
2717                                 if (flist->low == drop) {
2718                                         for (j = drop + 1;
2719                                              j < i && !F_IS_ACTIVE(flist->sorted[j]);
2720                                              j++) {}
2721                                         flist->low = j;
2722                                 }
2723                                 prev_i = i;
2724                         }
2725                 } else
2726                         prev_i = i;
2727         }
2728         flist->high = prev_i;
2729
2730         if (strip_root) {
2731                 /* We need to strip off the leading slashes for relative
2732                  * paths, but this must be done _after_ the sorting phase. */
2733                 for (i = flist->low; i <= flist->high; i++) {
2734                         struct file_struct *file = flist->sorted[i];
2735
2736                         if (!file->dirname)
2737                                 continue;
2738                         while (*file->dirname == '/')
2739                                 file->dirname++;
2740                         if (!*file->dirname)
2741                                 file->dirname = NULL;
2742                 }
2743         }
2744
2745         if (prune_empty_dirs && !am_sender) {
2746                 int j, prev_depth = 0;
2747
2748                 prev_i = 0; /* It's OK that this isn't really true. */
2749
2750                 for (i = flist->low; i <= flist->high; i++) {
2751                         struct file_struct *fp, *file = flist->sorted[i];
2752
2753                         /* This temporarily abuses the F_DEPTH() value for a
2754                          * directory that is in a chain that might get pruned.
2755                          * We restore the old value if it gets a reprieve. */
2756                         if (S_ISDIR(file->mode) && F_DEPTH(file)) {
2757                                 /* Dump empty dirs when coming back down. */
2758                                 for (j = prev_depth; j >= F_DEPTH(file); j--) {
2759                                         fp = flist->sorted[prev_i];
2760                                         if (F_DEPTH(fp) >= 0)
2761                                                 break;
2762                                         prev_i = -F_DEPTH(fp)-1;
2763                                         clear_file(fp);
2764                                 }
2765                                 prev_depth = F_DEPTH(file);
2766                                 if (is_excluded(f_name(file, fbuf), 1,
2767                                                        ALL_FILTERS)) {
2768                                         /* Keep dirs through this dir. */
2769                                         for (j = prev_depth-1; ; j--) {
2770                                                 fp = flist->sorted[prev_i];
2771                                                 if (F_DEPTH(fp) >= 0)
2772                                                         break;
2773                                                 prev_i = -F_DEPTH(fp)-1;
2774                                                 F_DEPTH(fp) = j;
2775                                         }
2776                                 } else
2777                                         F_DEPTH(file) = -prev_i-1;
2778                                 prev_i = i;
2779                         } else {
2780                                 /* Keep dirs through this non-dir. */
2781                                 for (j = prev_depth; ; j--) {
2782                                         fp = flist->sorted[prev_i];
2783                                         if (F_DEPTH(fp) >= 0)
2784                                                 break;
2785                                         prev_i = -F_DEPTH(fp)-1;
2786                                         F_DEPTH(fp) = j;
2787                                 }
2788                         }
2789                 }
2790                 /* Dump all remaining empty dirs. */
2791                 while (1) {
2792                         struct file_struct *fp = flist->sorted[prev_i];
2793                         if (F_DEPTH(fp) >= 0)
2794                                 break;
2795                         prev_i = -F_DEPTH(fp)-1;
2796                         clear_file(fp);
2797                 }
2798
2799                 for (i = flist->low; i <= flist->high; i++) {
2800                         if (F_IS_ACTIVE(flist->sorted[i]))
2801                                 break;
2802                 }
2803                 flist->low = i;
2804                 for (i = flist->high; i >= flist->low; i--) {
2805                         if (F_IS_ACTIVE(flist->sorted[i]))
2806                                 break;
2807                 }
2808                 flist->high = i;
2809         }
2810 }
2811
2812 static void output_flist(struct file_list *flist)
2813 {
2814         char uidbuf[16], gidbuf[16], depthbuf[16];
2815         struct file_struct *file;
2816         const char *root, *dir, *slash, *name, *trail;
2817         const char *who = who_am_i();
2818         int i;
2819
2820         rprintf(FINFO, "[%s] flist start=%d, used=%d, low=%d, high=%d\n",
2821                 who, flist->ndx_start, flist->used, flist->low, flist->high);
2822         for (i = 0; i < flist->used; i++) {
2823                 file = flist->files[i];
2824                 if ((am_root || am_sender) && uid_ndx) {
2825                         snprintf(uidbuf, sizeof uidbuf, " uid=%u",
2826                                  F_OWNER(file));
2827                 } else
2828                         *uidbuf = '\0';
2829                 if (gid_ndx) {
2830                         static char parens[] = "(\0)\0\0\0";
2831                         char *pp = parens + (file->flags & FLAG_SKIP_GROUP ? 0 : 3);
2832                         snprintf(gidbuf, sizeof gidbuf, " gid=%s%u%s",
2833                                  pp, F_GROUP(file), pp + 2);
2834                 } else
2835                         *gidbuf = '\0';
2836                 if (!am_sender)
2837                         snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file));
2838                 if (F_IS_ACTIVE(file)) {
2839                         root = am_sender ? NS(F_PATHNAME(file)) : depthbuf;
2840                         if ((dir = file->dirname) == NULL)
2841                                 dir = slash = "";
2842                         else
2843                                 slash = "/";
2844                         name = file->basename;
2845                         trail = S_ISDIR(file->mode) ? "/" : "";
2846                 } else
2847                         root = dir = slash = name = trail = "";
2848                 rprintf(FINFO,
2849                         "[%s] i=%d %s %s%s%s%s mode=0%o len=%.0f%s%s flags=%x\n",
2850                         who, i + flist->ndx_start,
2851                         root, dir, slash, name, trail,
2852                         (int)file->mode, (double)F_LENGTH(file),
2853                         uidbuf, gidbuf, file->flags);
2854         }
2855 }
2856
2857 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
2858 enum fnc_type { t_PATH, t_ITEM };
2859
2860 static int found_prefix;
2861
2862 /* Compare the names of two file_struct entities, similar to how strcmp()
2863  * would do if it were operating on the joined strings.
2864  *
2865  * Some differences beginning with protocol_version 29: (1) directory names
2866  * are compared with an assumed trailing slash so that they compare in a
2867  * way that would cause them to sort immediately prior to any content they
2868  * may have; (2) a directory of any name compares after a non-directory of
2869  * any name at the same depth; (3) a directory with name "." compares prior
2870  * to anything else.  These changes mean that a directory and a non-dir
2871  * with the same name will not compare as equal (protocol_version >= 29).
2872  *
2873  * The dirname component can be an empty string, but the basename component
2874  * cannot (and never is in the current codebase).  The basename component
2875  * may be NULL (for a removed item), in which case it is considered to be
2876  * after any existing item. */
2877 int f_name_cmp(const struct file_struct *f1, const struct file_struct *f2)
2878 {
2879         int dif;
2880         const uchar *c1, *c2;
2881         enum fnc_state state1, state2;
2882         enum fnc_type type1, type2;
2883         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
2884
2885         if (!f1 || !F_IS_ACTIVE(f1)) {
2886                 if (!f2 || !F_IS_ACTIVE(f2))
2887                         return 0;
2888                 return -1;
2889         }
2890         if (!f2 || !F_IS_ACTIVE(f2))
2891                 return 1;
2892
2893         c1 = (uchar*)f1->dirname;
2894         c2 = (uchar*)f2->dirname;
2895         if (c1 == c2)
2896                 c1 = c2 = NULL;
2897         if (!c1) {
2898                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2899                 c1 = (const uchar*)f1->basename;
2900                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2901                         type1 = t_ITEM;
2902                         state1 = s_TRAILING;
2903                         c1 = (uchar*)"";
2904                 } else
2905                         state1 = s_BASE;
2906         } else {
2907                 type1 = t_path;
2908                 state1 = s_DIR;
2909         }
2910         if (!c2) {
2911                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2912                 c2 = (const uchar*)f2->basename;
2913                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2914                         type2 = t_ITEM;
2915                         state2 = s_TRAILING;
2916                         c2 = (uchar*)"";
2917                 } else
2918                         state2 = s_BASE;
2919         } else {
2920                 type2 = t_path;
2921                 state2 = s_DIR;
2922         }
2923
2924         if (type1 != type2)
2925                 return type1 == t_PATH ? 1 : -1;
2926
2927         do {
2928                 if (!*c1) {
2929                         switch (state1) {
2930                         case s_DIR:
2931                                 state1 = s_SLASH;
2932                                 c1 = (uchar*)"/";
2933                                 break;
2934                         case s_SLASH:
2935                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2936                                 c1 = (const uchar*)f1->basename;
2937                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2938                                         type1 = t_ITEM;
2939                                         state1 = s_TRAILING;
2940                                         c1 = (uchar*)"";
2941                                 } else
2942                                         state1 = s_BASE;
2943                                 break;
2944                         case s_BASE:
2945                                 state1 = s_TRAILING;
2946                                 if (type1 == t_PATH) {
2947                                         c1 = (uchar*)"/";
2948                                         break;
2949                                 }
2950                                 /* FALL THROUGH */
2951                         case s_TRAILING:
2952                                 type1 = t_ITEM;
2953                                 break;
2954                         }
2955                         if (*c2 && type1 != type2)
2956                                 return type1 == t_PATH ? 1 : -1;
2957                 }
2958                 if (!*c2) {
2959                         switch (state2) {
2960                         case s_DIR:
2961                                 state2 = s_SLASH;
2962                                 c2 = (uchar*)"/";
2963                                 break;
2964                         case s_SLASH:
2965                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2966                                 c2 = (const uchar*)f2->basename;
2967                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2968                                         type2 = t_ITEM;
2969                                         state2 = s_TRAILING;
2970                                         c2 = (uchar*)"";
2971                                 } else
2972                                         state2 = s_BASE;
2973                                 break;
2974                         case s_BASE:
2975                                 state2 = s_TRAILING;
2976                                 if (type2 == t_PATH) {
2977                                         c2 = (uchar*)"/";
2978                                         break;
2979                                 }
2980                                 /* FALL THROUGH */
2981                         case s_TRAILING:
2982                                 found_prefix = 1;
2983                                 if (!*c1)
2984                                         return 0;
2985                                 type2 = t_ITEM;
2986                                 break;
2987                         }
2988                         if (type1 != type2)
2989                                 return type1 == t_PATH ? 1 : -1;
2990                 }
2991         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
2992
2993         return dif;
2994 }
2995
2996 /* Returns 1 if f1's filename has all of f2's filename as a prefix.  This does
2997  * not match if f2's basename is not an exact match of a path element in f1.
2998  * E.g. /path/foo is not a prefix of /path/foobar/baz, but /path/foobar is. */
2999 int f_name_has_prefix(const struct file_struct *f1, const struct file_struct *f2)
3000 {
3001         found_prefix = 0;
3002         f_name_cmp(f1, f2);
3003         return found_prefix;
3004 }
3005
3006 char *f_name_buf(void)
3007 {
3008         static char names[5][MAXPATHLEN];
3009         static unsigned int n;
3010
3011         n = (n + 1) % (sizeof names / sizeof names[0]);
3012
3013         return names[n];
3014 }
3015
3016 /* Return a copy of the full filename of a flist entry, using the indicated
3017  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
3018  * done because we checked the size when creating the file_struct entry.
3019  */
3020 char *f_name(const struct file_struct *f, char *fbuf)
3021 {
3022         if (!f || !F_IS_ACTIVE(f))
3023                 return NULL;
3024
3025         if (!fbuf)
3026                 fbuf = f_name_buf();
3027
3028         if (f->dirname) {
3029                 int len = strlen(f->dirname);
3030                 memcpy(fbuf, f->dirname, len);
3031                 fbuf[len] = '/';
3032                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
3033         } else
3034                 strlcpy(fbuf, f->basename, MAXPATHLEN);
3035
3036         return fbuf;
3037 }
3038
3039 /* Do a non-recursive scan of the named directory, possibly ignoring all
3040  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
3041  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
3042  * buffer (the functions we call will append names onto the end, but the old
3043  * dir value will be restored on exit). */
3044 struct file_list *get_dirlist(char *dirname, int dlen, int ignore_filter_rules)
3045 {
3046         struct file_list *dirlist;
3047         char dirbuf[MAXPATHLEN];
3048         int save_recurse = recurse;
3049         int save_xfer_dirs = xfer_dirs;
3050         int save_prune_empty_dirs = prune_empty_dirs;
3051
3052         if (dlen < 0) {
3053                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
3054                 if (dlen >= MAXPATHLEN)
3055                         return NULL;
3056                 dirname = dirbuf;
3057         }
3058
3059         dirlist = flist_new(FLIST_TEMP, "get_dirlist");
3060
3061         recurse = 0;
3062         xfer_dirs = 1;
3063         send_directory(ignore_filter_rules ? -2 : -1, dirlist, dirname, dlen, FLAG_CONTENT_DIR);
3064         xfer_dirs = save_xfer_dirs;
3065         recurse = save_recurse;
3066         if (do_progress)
3067                 flist_count_offset += dirlist->used;
3068
3069         prune_empty_dirs = 0;
3070         dirlist->sorted = dirlist->files;
3071         flist_sort_and_clean(dirlist, 0);
3072         prune_empty_dirs = save_prune_empty_dirs;
3073
3074         if (verbose > 3)
3075                 output_flist(dirlist);
3076
3077         return dirlist;
3078 }