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) 2002-2008 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 "inums.h"
  27 #include "io.h"
  28
  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 always_checksum;
  36 extern int module_id;
  37 extern int ignore_errors;
  38 extern int numeric_ids;
  39 extern int recurse;
  40 extern int use_qsort;
  41 extern int xfer_dirs;
  42 extern int filesfrom_fd;
  43 extern int one_file_system;
  44 extern int copy_dirlinks;
  45 extern int keep_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 uid_ndx;
  55 extern int gid_ndx;
  56 extern int eol_nulls;
  57 extern int relative_paths;
  58 extern int implied_dirs;
  59 extern int file_extra_cnt;
  60 extern int ignore_perishable;
  61 extern int non_perishable_cnt;
  62 extern int prune_empty_dirs;
  63 extern int copy_links;
  64 extern int copy_unsafe_links;
  65 extern int protocol_version;
  66 extern int sanitize_paths;
  67 extern int munge_symlinks;
  68 extern int need_unsorted_flist;
  69 extern int sender_symlink_iconv;
  70 extern int output_needs_newline;
  71 extern int sender_keeps_checksum;
  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 (DEBUG_GTE(FLIST, 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 INFO_GTE(FLIST, 1) && xfer_dirs && !am_server && !inc_recurse;
 146 }
 147
 148 static void start_filelist_progress(char *kind)
 149 {
 150         rprintf(FCLIENT, "%s ... ", kind);
 151         output_needs_newline = 1;
 152         rflush(FINFO);
 153 }
 154
 155 static void emit_filelist_progress(int count)
 156 {
 157         rprintf(FCLIENT, " %d files...\r", count);
 158 }
 159
 160 static void maybe_emit_filelist_progress(int count)
 161 {
 162         if (INFO_GTE(FLIST, 2) && show_filelist_p() && (count % 100) == 0)
 163                 emit_filelist_progress(count);
 164 }
 165
 166 static void finish_filelist_progress(const struct file_list *flist)
 167 {
 168         if (INFO_GTE(FLIST, 2)) {
 169                 /* This overwrites the progress line */
 170                 rprintf(FINFO, "%d file%sto consider\n",
 171                         flist->used, flist->used == 1 ? " " : "s ");
 172         } else {
 173                 output_needs_newline = 0;
 174                 rprintf(FINFO, "done\n");
 175         }
 176 }
 177
 178 void show_flist_stats(void)
 179 {
 180         /* Nothing yet */
 181 }
 182
 183 /* Stat either a symlink or its referent, depending on the settings of
 184  * copy_links, copy_unsafe_links, etc.  Returns -1 on error, 0 on success.
 185  *
 186  * If path is the name of a symlink, then the linkbuf buffer (which must hold
 187  * MAXPATHLEN chars) will be set to the symlink's target string.
 188  *
 189  * The stat structure pointed to by stp will contain information about the
 190  * link or the referent as appropriate, if they exist. */
 191 static int readlink_stat(const char *path, STRUCT_STAT *stp, char *linkbuf)
 192 {
 193 #ifdef SUPPORT_LINKS
 194         if (link_stat(path, stp, copy_dirlinks) < 0)
 195                 return -1;
 196         if (S_ISLNK(stp->st_mode)) {
 197                 int llen = readlink(path, linkbuf, MAXPATHLEN - 1);
 198                 if (llen < 0)
 199                         return -1;
 200                 linkbuf[llen] = '\0';
 201                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 202                         if (INFO_GTE(SYMSAFE, 1)) {
 203                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 204                                         path, linkbuf);
 205                         }
 206                         return x_stat(path, stp, NULL);
 207                 }
 208                 if (munge_symlinks && am_sender && llen > SYMLINK_PREFIX_LEN
 209                  && strncmp(linkbuf, SYMLINK_PREFIX, SYMLINK_PREFIX_LEN) == 0) {
 210                         memmove(linkbuf, linkbuf + SYMLINK_PREFIX_LEN,
 211                                 llen - SYMLINK_PREFIX_LEN + 1);
 212                 }
 213         }
 214         return 0;
 215 #else
 216         return x_stat(path, stp, NULL);
 217 #endif
 218 }
 219
 220 int link_stat(const char *path, STRUCT_STAT *stp, int follow_dirlinks)
 221 {
 222 #ifdef SUPPORT_LINKS
 223         if (copy_links)
 224                 return x_stat(path, stp, NULL);
 225         if (x_lstat(path, stp, NULL) < 0)
 226                 return -1;
 227         if (follow_dirlinks && S_ISLNK(stp->st_mode)) {
 228                 STRUCT_STAT st;
 229                 if (x_stat(path, &st, NULL) == 0 && S_ISDIR(st.st_mode))
 230                         *stp = st;
 231         }
 232         return 0;
 233 #else
 234         return x_stat(path, stp, NULL);
 235 #endif
 236 }
 237
 238 static inline int is_daemon_excluded(const char *fname, int is_dir)
 239 {
 240         if (daemon_filter_list.head
 241          && check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
 242                 errno = ENOENT;
 243                 return 1;
 244         }
 245         return 0;
 246 }
 247
 248 static inline int path_is_daemon_excluded(char *path, int ignore_filename)
 249 {
 250         if (daemon_filter_list.head) {
 251                 char *slash = path;
 252
 253                 while ((slash = strchr(slash+1, '/')) != NULL) {
 254                         int ret;
 255                         *slash = '\0';
 256                         ret = check_filter(&daemon_filter_list, FLOG, path, 1);
 257                         *slash = '/';
 258                         if (ret < 0) {
 259                                 errno = ENOENT;
 260                                 return 1;
 261                         }
 262                 }
 263
 264                 if (!ignore_filename
 265                  && check_filter(&daemon_filter_list, FLOG, path, 1) < 0) {
 266                         errno = ENOENT;
 267                         return 1;
 268                 }
 269         }
 270
 271         return 0;
 272 }
 273
 274 /* This function is used to check if a file should be included/excluded
 275  * from the list of files based on its name and type etc.  The value of
 276  * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
 277 static int is_excluded(const char *fname, int is_dir, int filter_level)
 278 {
 279 #if 0 /* This currently never happens, so avoid a useless compare. */
 280         if (filter_level == NO_FILTERS)
 281                 return 0;
 282 #endif
 283         if (is_daemon_excluded(fname, is_dir))
 284                 return 1;
 285         if (filter_level != ALL_FILTERS)
 286                 return 0;
 287         if (filter_list.head
 288             && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
 289                 return 1;
 290         return 0;
 291 }
 292
 293 static void send_directory(int f, struct file_list *flist,
 294                            char *fbuf, int len, int flags);
 295
 296 static const char *pathname, *orig_dir;
 297 static int pathname_len;
 298
 299 /* Make sure flist can hold at least flist->used + extra entries. */
 300 static void flist_expand(struct file_list *flist, int extra)
 301 {
 302         struct file_struct **new_ptr;
 303
 304         if (flist->used + extra <= flist->malloced)
 305                 return;
 306
 307         if (flist->malloced < FLIST_START)
 308                 flist->malloced = FLIST_START;
 309         else if (flist->malloced >= FLIST_LINEAR)
 310                 flist->malloced += FLIST_LINEAR;
 311         else
 312                 flist->malloced *= 2;
 313
 314         /* In case count jumped or we are starting the list
 315          * with a known size just set it. */
 316         if (flist->malloced < flist->used + extra)
 317                 flist->malloced = flist->used + extra;
 318
 319         new_ptr = realloc_array(flist->files, struct file_struct *,
 320                                 flist->malloced);
 321
 322         if (DEBUG_GTE(FLIST, 1) && flist->malloced != FLIST_START) {
 323                 rprintf(FCLIENT, "[%s] expand file_list pointer array to %s bytes, did%s move\n",
 324                     who_am_i(),
 325                     big_num(sizeof flist->files[0] * flist->malloced),
 326                     (new_ptr == flist->files) ? " not" : "");
 327         }
 328
 329         flist->files = new_ptr;
 330
 331         if (!flist->files)
 332                 out_of_memory("flist_expand");
 333 }
 334
 335 static void flist_done_allocating(struct file_list *flist)
 336 {
 337         void *ptr = pool_boundary(flist->file_pool, 8*1024);
 338         if (flist->pool_boundary == ptr)
 339                 flist->pool_boundary = NULL; /* list didn't use any pool memory */
 340         else
 341                 flist->pool_boundary = ptr;
 342 }
 343
 344 /* Call this with EITHER (1) "file, NULL, 0" to chdir() to the file's
 345  * F_PATHNAME(), or (2) "NULL, dir, dirlen" to chdir() to the supplied dir,
 346  * with dir == NULL taken to be the starting directory, and dirlen < 0
 347  * indicating that strdup(dir) should be called and then the -dirlen length
 348  * value checked to ensure that it is not daemon-excluded. */
 349 int change_pathname(struct file_struct *file, const char *dir, int dirlen)
 350 {
 351         if (dirlen < 0) {
 352                 char *cpy = strdup(dir);
 353                 if (*cpy != '/')
 354                         change_dir(orig_dir, CD_SKIP_CHDIR);
 355                 if (path_is_daemon_excluded(cpy, 0))
 356                         goto chdir_error;
 357                 dir = cpy;
 358                 dirlen = -dirlen;
 359         } else {
 360                 if (file) {
 361                         if (pathname == F_PATHNAME(file))
 362                                 return 1;
 363                         dir = F_PATHNAME(file);
 364                         if (dir)
 365                                 dirlen = strlen(dir);
 366                 } else if (pathname == dir)
 367                         return 1;
 368                 if (dir && *dir != '/')
 369                         change_dir(orig_dir, CD_SKIP_CHDIR);
 370         }
 371
 372         pathname = dir;
 373         pathname_len = dirlen;
 374
 375         if (!dir)
 376                 dir = orig_dir;
 377
 378         if (!change_dir(dir, CD_NORMAL)) {
 379           chdir_error:
 380                 io_error |= IOERR_GENERAL;
 381                 rsyserr(FERROR_XFER, errno, "change_dir %s failed", full_fname(dir));
 382                 if (dir != orig_dir)
 383                         change_dir(orig_dir, CD_NORMAL);
 384                 pathname = NULL;
 385                 pathname_len = 0;
 386                 return 0;
 387         }
 388
 389         return 1;
 390 }
 391
 392 static void send_file_entry(int f, const char *fname, struct file_struct *file,
 393 #ifdef SUPPORT_LINKS
 394                             const char *symlink_name, int symlink_len,
 395 #endif
 396                             int ndx, int first_ndx)
 397 {
 398         static time_t modtime;
 399         static mode_t mode;
 400 #ifdef SUPPORT_HARD_LINKS
 401         static int64 dev;
 402 #endif
 403         static dev_t rdev;
 404         static uint32 rdev_major;
 405         static uid_t uid;
 406         static gid_t gid;
 407         static const char *user_name, *group_name;
 408         static char lastname[MAXPATHLEN];
 409 #ifdef SUPPORT_HARD_LINKS
 410         int first_hlink_ndx = -1;
 411 #endif
 412         int l1, l2;
 413         int xflags;
 414
 415         /* Initialize starting value of xflags. */
 416         if (protocol_version >= 30 && S_ISDIR(file->mode)) {
 417                 dir_count++;
 418                 if (file->flags & FLAG_CONTENT_DIR)
 419                         xflags = file->flags & FLAG_TOP_DIR;
 420                 else if (file->flags & FLAG_IMPLIED_DIR)
 421                         xflags = XMIT_TOP_DIR | XMIT_NO_CONTENT_DIR;
 422                 else
 423                         xflags = XMIT_NO_CONTENT_DIR;
 424         } else
 425                 xflags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */
 426
 427         if (file->mode == mode)
 428                 xflags |= XMIT_SAME_MODE;
 429         else
 430                 mode = file->mode;
 431
 432         if ((preserve_devices && IS_DEVICE(mode))
 433          || (preserve_specials && IS_SPECIAL(mode))) {
 434                 if (protocol_version < 28) {
 435                         if (tmp_rdev == rdev)
 436                                 xflags |= XMIT_SAME_RDEV_pre28;
 437                         else
 438                                 rdev = tmp_rdev;
 439                 } else {
 440                         rdev = tmp_rdev;
 441                         if ((uint32)major(rdev) == rdev_major)
 442                                 xflags |= XMIT_SAME_RDEV_MAJOR;
 443                         else
 444                                 rdev_major = major(rdev);
 445                         if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu)
 446                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
 447                 }
 448         } else if (protocol_version < 28)
 449                 rdev = MAKEDEV(0, 0);
 450         if (!preserve_uid || ((uid_t)F_OWNER(file) == uid && *lastname))
 451                 xflags |= XMIT_SAME_UID;
 452         else {
 453                 uid = F_OWNER(file);
 454                 if (!numeric_ids) {
 455                         user_name = add_uid(uid);
 456                         if (inc_recurse && user_name)
 457                                 xflags |= XMIT_USER_NAME_FOLLOWS;
 458                 }
 459         }
 460         if (!preserve_gid || ((gid_t)F_GROUP(file) == gid && *lastname))
 461                 xflags |= XMIT_SAME_GID;
 462         else {
 463                 gid = F_GROUP(file);
 464                 if (!numeric_ids) {
 465                         group_name = add_gid(gid);
 466                         if (inc_recurse && group_name)
 467                                 xflags |= XMIT_GROUP_NAME_FOLLOWS;
 468                 }
 469         }
 470         if (file->modtime == modtime)
 471                 xflags |= XMIT_SAME_TIME;
 472         else
 473                 modtime = file->modtime;
 474
 475 #ifdef SUPPORT_HARD_LINKS
 476         if (tmp_dev != 0) {
 477                 if (protocol_version >= 30) {
 478                         struct ht_int64_node *np = idev_find(tmp_dev, tmp_ino);
 479                         first_hlink_ndx = (int32)(long)np->data - 1;
 480                         if (first_hlink_ndx < 0) {
 481                                 np->data = (void*)(long)(first_ndx + ndx + 1);
 482                                 xflags |= XMIT_HLINK_FIRST;
 483                         }
 484                         if (DEBUG_GTE(HLINK, 1)) {
 485                                 if (first_hlink_ndx >= 0) {
 486                                         rprintf(FINFO, "[%s] #%d hard-links #%d (%sabbrev)\n",
 487                                                 who_am_i(), first_ndx + ndx, first_hlink_ndx,
 488                                                 first_hlink_ndx >= first_ndx ? "" : "un");
 489                                 } else if (DEBUG_GTE(HLINK, 3)) {
 490                                         rprintf(FINFO, "[%s] dev:inode for #%d is %s:%s\n",
 491                                                 who_am_i(), first_ndx + ndx,
 492                                                 big_num(tmp_dev), big_num(tmp_ino));
 493                                 }
 494                         }
 495                 } else {
 496                         if (tmp_dev == dev) {
 497                                 if (protocol_version >= 28)
 498                                         xflags |= XMIT_SAME_DEV_pre30;
 499                         } else
 500                                 dev = tmp_dev;
 501                 }
 502                 xflags |= XMIT_HLINKED;
 503         }
 504 #endif
 505
 506         for (l1 = 0;
 507             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 508             l1++) {}
 509         l2 = strlen(fname+l1);
 510
 511         if (l1 > 0)
 512                 xflags |= XMIT_SAME_NAME;
 513         if (l2 > 255)
 514                 xflags |= XMIT_LONG_NAME;
 515
 516         /* We must make sure we don't send a zero flag byte or the
 517          * other end will terminate the flist transfer.  Note that
 518          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 519          * it's harmless way to add a bit to the first flag byte. */
 520         if (protocol_version >= 28) {
 521                 if (!xflags && !S_ISDIR(mode))
 522                         xflags |= XMIT_TOP_DIR;
 523                 if ((xflags & 0xFF00) || !xflags) {
 524                         xflags |= XMIT_EXTENDED_FLAGS;
 525                         write_shortint(f, xflags);
 526                 } else
 527                         write_byte(f, xflags);
 528         } else {
 529                 if (!(xflags & 0xFF))
 530                         xflags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
 531                 write_byte(f, xflags);
 532         }
 533         if (xflags & XMIT_SAME_NAME)
 534                 write_byte(f, l1);
 535         if (xflags & XMIT_LONG_NAME)
 536                 write_varint30(f, l2);
 537         else
 538                 write_byte(f, l2);
 539         write_buf(f, fname + l1, l2);
 540
 541 #ifdef SUPPORT_HARD_LINKS
 542         if (first_hlink_ndx >= 0) {
 543                 write_varint(f, first_hlink_ndx);
 544                 if (first_hlink_ndx >= first_ndx)
 545                         goto the_end;
 546         }
 547 #endif
 548
 549         write_varlong30(f, F_LENGTH(file), 3);
 550         if (!(xflags & XMIT_SAME_TIME)) {
 551                 if (protocol_version >= 30)
 552                         write_varlong(f, modtime, 4);
 553                 else
 554                         write_int(f, modtime);
 555         }
 556         if (!(xflags & XMIT_SAME_MODE))
 557                 write_int(f, to_wire_mode(mode));
 558         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
 559                 if (protocol_version < 30)
 560                         write_int(f, uid);
 561                 else {
 562                         write_varint(f, uid);
 563                         if (xflags & XMIT_USER_NAME_FOLLOWS) {
 564                                 int len = strlen(user_name);
 565                                 write_byte(f, len);
 566                                 write_buf(f, user_name, len);
 567                         }
 568                 }
 569         }
 570         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
 571                 if (protocol_version < 30)
 572                         write_int(f, gid);
 573                 else {
 574                         write_varint(f, gid);
 575                         if (xflags & XMIT_GROUP_NAME_FOLLOWS) {
 576                                 int len = strlen(group_name);
 577                                 write_byte(f, len);
 578                                 write_buf(f, group_name, len);
 579                         }
 580                 }
 581         }
 582         if ((preserve_devices && IS_DEVICE(mode))
 583          || (preserve_specials && IS_SPECIAL(mode))) {
 584                 if (protocol_version < 28) {
 585                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 586                                 write_int(f, (int)rdev);
 587                 } else {
 588                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 589                                 write_varint30(f, major(rdev));
 590                         if (protocol_version >= 30)
 591                                 write_varint(f, minor(rdev));
 592                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 593                                 write_byte(f, minor(rdev));
 594                         else
 595                                 write_int(f, minor(rdev));
 596                 }
 597         }
 598
 599 #ifdef SUPPORT_LINKS
 600         if (symlink_len) {
 601                 write_varint30(f, symlink_len);
 602                 write_buf(f, symlink_name, symlink_len);
 603         }
 604 #endif
 605
 606 #ifdef SUPPORT_HARD_LINKS
 607         if (tmp_dev != 0 && protocol_version < 30) {
 608                 if (protocol_version < 26) {
 609                         /* 32-bit dev_t and ino_t */
 610                         write_int(f, (int32)dev);
 611                         write_int(f, (int32)tmp_ino);
 612                 } else {
 613                         /* 64-bit dev_t and ino_t */
 614                         if (!(xflags & XMIT_SAME_DEV_pre30))
 615                                 write_longint(f, dev);
 616                         write_longint(f, tmp_ino);
 617                 }
 618         }
 619 #endif
 620
 621         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 622                 const char *sum;
 623                 if (S_ISREG(mode))
 624                         sum = tmp_sum;
 625                 else {
 626                         /* Prior to 28, we sent a useless set of nulls. */
 627                         sum = empty_sum;
 628                 }
 629                 write_buf(f, sum, checksum_len);
 630         }
 631
 632 #ifdef SUPPORT_HARD_LINKS
 633   the_end:
 634 #endif
 635         strlcpy(lastname, fname, MAXPATHLEN);
 636
 637         if (S_ISREG(mode) || S_ISLNK(mode))
 638                 stats.total_size += F_LENGTH(file);
 639 }
 640
 641 static struct file_struct *recv_file_entry(struct file_list *flist,
 642                                            int xflags, int f)
 643 {
 644         static int64 modtime;
 645         static mode_t mode;
 646 #ifdef SUPPORT_HARD_LINKS
 647         static int64 dev;
 648 #endif
 649         static dev_t rdev;
 650         static uint32 rdev_major;
 651         static uid_t uid;
 652         static gid_t gid;
 653         static uint16 gid_flags;
 654         static char lastname[MAXPATHLEN], *lastdir;
 655         static int lastdir_depth, lastdir_len = -1;
 656         static unsigned int del_hier_name_len = 0;
 657         static int in_del_hier = 0;
 658         char thisname[MAXPATHLEN];
 659         unsigned int l1 = 0, l2 = 0;
 660         int alloc_len, basename_len, linkname_len;
 661         int extra_len = file_extra_cnt * EXTRA_LEN;
 662         int first_hlink_ndx = -1;
 663         int64 file_length;
 664         const char *basename;
 665         struct file_struct *file;
 666         alloc_pool_t *pool;
 667         char *bp;
 668
 669         if (xflags & XMIT_SAME_NAME)
 670                 l1 = read_byte(f);
 671
 672         if (xflags & XMIT_LONG_NAME)
 673                 l2 = read_varint30(f);
 674         else
 675                 l2 = read_byte(f);
 676
 677         if (l2 >= MAXPATHLEN - l1) {
 678                 rprintf(FERROR,
 679                         "overflow: xflags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
 680                         xflags, l1, l2, lastname, who_am_i());
 681                 overflow_exit("recv_file_entry");
 682         }
 683
 684         strlcpy(thisname, lastname, l1 + 1);
 685         read_sbuf(f, &thisname[l1], l2);
 686         thisname[l1 + l2] = 0;
 687
 688         /* Abuse basename_len for a moment... */
 689         basename_len = strlcpy(lastname, thisname, MAXPATHLEN);
 690
 691 #ifdef ICONV_OPTION
 692         if (ic_recv != (iconv_t)-1) {
 693                 xbuf outbuf, inbuf;
 694
 695                 INIT_CONST_XBUF(outbuf, thisname);
 696                 INIT_XBUF(inbuf, lastname, basename_len, (size_t)-1);
 697
 698                 if (iconvbufs(ic_recv, &inbuf, &outbuf, 0) < 0) {
 699                         io_error |= IOERR_GENERAL;
 700                         rprintf(FERROR_UTF8,
 701                             "[%s] cannot convert filename: %s (%s)\n",
 702                             who_am_i(), lastname, strerror(errno));
 703                         outbuf.len = 0;
 704                 }
 705                 thisname[outbuf.len] = '\0';
 706         }
 707 #endif
 708
 709         if (*thisname)
 710                 clean_fname(thisname, 0);
 711
 712         if (sanitize_paths)
 713                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
 714
 715         if ((basename = strrchr(thisname, '/')) != NULL) {
 716                 int len = basename++ - thisname;
 717                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
 718                         lastdir = new_array(char, len + 1);
 719                         memcpy(lastdir, thisname, len);
 720                         lastdir[len] = '\0';
 721                         lastdir_len = len;
 722                         lastdir_depth = count_dir_elements(lastdir);
 723                 }
 724         } else
 725                 basename = thisname;
 726         basename_len = strlen(basename) + 1; /* count the '\0' */
 727
 728 #ifdef SUPPORT_HARD_LINKS
 729         if (protocol_version >= 30
 730          && BITS_SETnUNSET(xflags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
 731                 first_hlink_ndx = read_varint(f);
 732                 if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->ndx_start + flist->used) {
 733                         rprintf(FERROR,
 734                                 "hard-link reference out of range: %d (%d)\n",
 735                                 first_hlink_ndx, flist->ndx_start + flist->used);
 736                         exit_cleanup(RERR_PROTOCOL);
 737                 }
 738                 if (DEBUG_GTE(HLINK, 1)) {
 739                         rprintf(FINFO, "[%s] #%d hard-links #%d (%sabbrev)\n",
 740                                 who_am_i(), flist->used+flist->ndx_start, first_hlink_ndx,
 741                                 first_hlink_ndx >= flist->ndx_start ? "" : "un");
 742                 }
 743                 if (first_hlink_ndx >= flist->ndx_start) {
 744                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 745                         file_length = F_LENGTH(first);
 746                         modtime = first->modtime;
 747                         mode = first->mode;
 748                         if (preserve_uid)
 749                                 uid = F_OWNER(first);
 750                         if (preserve_gid)
 751                                 gid = F_GROUP(first);
 752                         if ((preserve_devices && IS_DEVICE(mode))
 753                          || (preserve_specials && IS_SPECIAL(mode))) {
 754                                 uint32 *devp = F_RDEV_P(first);
 755                                 rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
 756                                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 757                         }
 758                         if (preserve_links && S_ISLNK(mode))
 759                                 linkname_len = strlen(F_SYMLINK(first)) + 1;
 760                         else
 761                                 linkname_len = 0;
 762                         goto create_object;
 763                 }
 764         }
 765 #endif
 766
 767         file_length = read_varlong30(f, 3);
 768         if (!(xflags & XMIT_SAME_TIME)) {
 769                 if (protocol_version >= 30) {
 770                         modtime = read_varlong(f, 4);
 771 #if SIZEOF_TIME_T < SIZEOF_INT64
 772                         if (!am_generator && (int64)(time_t)modtime != modtime) {
 773                                 rprintf(FERROR_XFER,
 774                                     "Time value of %s truncated on receiver.\n",
 775                                     lastname);
 776                         }
 777 #endif
 778                 } else
 779                         modtime = read_int(f);
 780         }
 781         if (!(xflags & XMIT_SAME_MODE))
 782                 mode = from_wire_mode(read_int(f));
 783
 784         if (chmod_modes && !S_ISLNK(mode))
 785                 mode = tweak_mode(mode, chmod_modes);
 786
 787         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
 788                 if (protocol_version < 30)
 789                         uid = (uid_t)read_int(f);
 790                 else {
 791                         uid = (uid_t)read_varint(f);
 792                         if (xflags & XMIT_USER_NAME_FOLLOWS)
 793                                 uid = recv_user_name(f, uid);
 794                         else if (inc_recurse && am_root && !numeric_ids)
 795                                 uid = match_uid(uid);
 796                 }
 797         }
 798         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
 799                 if (protocol_version < 30)
 800                         gid = (gid_t)read_int(f);
 801                 else {
 802                         gid = (gid_t)read_varint(f);
 803                         gid_flags = 0;
 804                         if (xflags & XMIT_GROUP_NAME_FOLLOWS)
 805                                 gid = recv_group_name(f, gid, &gid_flags);
 806                         else if (inc_recurse && (!am_root || !numeric_ids))
 807                                 gid = match_gid(gid, &gid_flags);
 808                 }
 809         }
 810
 811         if ((preserve_devices && IS_DEVICE(mode))
 812          || (preserve_specials && IS_SPECIAL(mode))) {
 813                 if (protocol_version < 28) {
 814                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 815                                 rdev = (dev_t)read_int(f);
 816                 } else {
 817                         uint32 rdev_minor;
 818                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 819                                 rdev_major = read_varint30(f);
 820                         if (protocol_version >= 30)
 821                                 rdev_minor = read_varint(f);
 822                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 823                                 rdev_minor = read_byte(f);
 824                         else
 825                                 rdev_minor = read_int(f);
 826                         rdev = MAKEDEV(rdev_major, rdev_minor);
 827                 }
 828                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 829                 file_length = 0;
 830         } else if (protocol_version < 28)
 831                 rdev = MAKEDEV(0, 0);
 832
 833 #ifdef SUPPORT_LINKS
 834         if (preserve_links && S_ISLNK(mode)) {
 835                 linkname_len = read_varint30(f) + 1; /* count the '\0' */
 836                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 837                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 838                                 linkname_len - 1);
 839                         overflow_exit("recv_file_entry");
 840                 }
 841 #ifdef ICONV_OPTION
 842                 /* We don't know how much extra room we need to convert
 843                  * the as-yet-unread symlink data, so let's hope that a
 844                  * double-size buffer is plenty. */
 845                 if (sender_symlink_iconv)
 846                         linkname_len *= 2;
 847 #endif
 848                 if (munge_symlinks)
 849                         linkname_len += SYMLINK_PREFIX_LEN;
 850         }
 851         else
 852 #endif
 853                 linkname_len = 0;
 854
 855 #ifdef SUPPORT_HARD_LINKS
 856   create_object:
 857         if (preserve_hard_links) {
 858                 if (protocol_version < 28 && S_ISREG(mode))
 859                         xflags |= XMIT_HLINKED;
 860                 if (xflags & XMIT_HLINKED)
 861                         extra_len += (inc_recurse+1) * EXTRA_LEN;
 862         }
 863 #endif
 864
 865 #ifdef SUPPORT_ACLS
 866         /* Directories need an extra int32 for the default ACL. */
 867         if (preserve_acls && S_ISDIR(mode))
 868                 extra_len += EXTRA_LEN;
 869 #endif
 870
 871         if (always_checksum && S_ISREG(mode))
 872                 extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
 873
 874 #if SIZEOF_INT64 >= 8
 875         if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
 876                 extra_len += EXTRA_LEN;
 877 #endif
 878         if (file_length < 0) {
 879                 rprintf(FERROR, "Offset underflow: file-length is negative\n");
 880                 exit_cleanup(RERR_UNSUPPORTED);
 881         }
 882
 883         if (inc_recurse && S_ISDIR(mode)) {
 884                 if (one_file_system) {
 885                         /* Room to save the dir's device for -x */
 886                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 887                 }
 888                 pool = dir_flist->file_pool;
 889         } else
 890                 pool = flist->file_pool;
 891
 892 #if EXTRA_ROUNDING > 0
 893         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
 894                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
 895 #endif
 896
 897         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
 898                   + linkname_len;
 899         bp = pool_alloc(pool, alloc_len, "recv_file_entry");
 900
 901         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
 902         bp += extra_len;
 903         file = (struct file_struct *)bp;
 904         bp += FILE_STRUCT_LEN;
 905
 906         memcpy(bp, basename, basename_len);
 907
 908 #ifdef SUPPORT_HARD_LINKS
 909         if (xflags & XMIT_HLINKED)
 910                 file->flags |= FLAG_HLINKED;
 911 #endif
 912         file->modtime = (time_t)modtime;
 913         file->len32 = (uint32)file_length;
 914 #if SIZEOF_INT64 >= 8
 915         if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
 916 #if SIZEOF_CAPITAL_OFF_T < 8
 917                 rprintf(FERROR, "Offset overflow: attempted 64-bit file-length\n");
 918                 exit_cleanup(RERR_UNSUPPORTED);
 919 #else
 920                 file->flags |= FLAG_LENGTH64;
 921                 OPT_EXTRA(file, 0)->unum = (uint32)(file_length >> 32);
 922 #endif
 923         }
 924 #endif
 925         file->mode = mode;
 926         if (preserve_uid)
 927                 F_OWNER(file) = uid;
 928         if (preserve_gid) {
 929                 F_GROUP(file) = gid;
 930                 file->flags |= gid_flags;
 931         }
 932         if (unsort_ndx)
 933                 F_NDX(file) = flist->used + flist->ndx_start;
 934
 935         if (basename != thisname) {
 936                 file->dirname = lastdir;
 937                 F_DEPTH(file) = lastdir_depth + 1;
 938         } else
 939                 F_DEPTH(file) = 1;
 940
 941         if (S_ISDIR(mode)) {
 942                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
 943                         F_DEPTH(file)--;
 944                 if (protocol_version >= 30) {
 945                         if (!(xflags & XMIT_NO_CONTENT_DIR)) {
 946                                 if (xflags & XMIT_TOP_DIR)
 947                                         file->flags |= FLAG_TOP_DIR;
 948                                 file->flags |= FLAG_CONTENT_DIR;
 949                         } else if (xflags & XMIT_TOP_DIR)
 950                                 file->flags |= FLAG_IMPLIED_DIR;
 951                 } else if (xflags & XMIT_TOP_DIR) {
 952                         in_del_hier = recurse;
 953                         del_hier_name_len = F_DEPTH(file) == 0 ? 0 : l1 + l2;
 954                         if (relative_paths && del_hier_name_len > 2
 955                             && lastname[del_hier_name_len-1] == '.'
 956                             && lastname[del_hier_name_len-2] == '/')
 957                                 del_hier_name_len -= 2;
 958                         file->flags |= FLAG_TOP_DIR | FLAG_CONTENT_DIR;
 959                 } else if (in_del_hier) {
 960                         if (!relative_paths || !del_hier_name_len
 961                          || (l1 >= del_hier_name_len
 962                           && lastname[del_hier_name_len] == '/'))
 963                                 file->flags |= FLAG_CONTENT_DIR;
 964                         else
 965                                 in_del_hier = 0;
 966                 }
 967         }
 968
 969         if ((preserve_devices && IS_DEVICE(mode))
 970          || (preserve_specials && IS_SPECIAL(mode))) {
 971                 uint32 *devp = F_RDEV_P(file);
 972                 DEV_MAJOR(devp) = major(rdev);
 973                 DEV_MINOR(devp) = minor(rdev);
 974         }
 975
 976 #ifdef SUPPORT_LINKS
 977         if (linkname_len) {
 978                 bp += basename_len;
 979                 if (first_hlink_ndx >= flist->ndx_start) {
 980                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 981                         memcpy(bp, F_SYMLINK(first), linkname_len);
 982                 } else {
 983                         if (munge_symlinks) {
 984                                 strlcpy(bp, SYMLINK_PREFIX, linkname_len);
 985                                 bp += SYMLINK_PREFIX_LEN;
 986                                 linkname_len -= SYMLINK_PREFIX_LEN;
 987                         }
 988 #ifdef ICONV_OPTION
 989                         if (sender_symlink_iconv) {
 990                                 xbuf outbuf, inbuf;
 991
 992                                 alloc_len = linkname_len;
 993                                 linkname_len /= 2;
 994
 995                                 /* Read the symlink data into the end of our double-sized
 996                                  * buffer and then convert it into the right spot. */
 997                                 INIT_XBUF(inbuf, bp + alloc_len - linkname_len,
 998                                           linkname_len - 1, (size_t)-1);
 999                                 read_sbuf(f, inbuf.buf, inbuf.len);
1000                                 INIT_XBUF(outbuf, bp, 0, alloc_len);
1001
1002                                 if (iconvbufs(ic_recv, &inbuf, &outbuf, 0) < 0) {
1003                                         io_error |= IOERR_GENERAL;
1004                                         rprintf(FERROR_XFER,
1005                                             "[%s] cannot convert symlink data for: %s (%s)\n",
1006                                             who_am_i(), full_fname(thisname), strerror(errno));
1007                                         bp = (char*)file->basename;
1008                                         *bp++ = '\0';
1009                                         outbuf.len = 0;
1010                                 }
1011                                 bp[outbuf.len] = '\0';
1012                         } else
1013 #endif
1014                                 read_sbuf(f, bp, linkname_len - 1);
1015                         if (sanitize_paths && !munge_symlinks && *bp)
1016                                 sanitize_path(bp, bp, "", lastdir_depth, SP_DEFAULT);
1017                 }
1018         }
1019 #endif
1020
1021 #ifdef SUPPORT_HARD_LINKS
1022         if (preserve_hard_links && xflags & XMIT_HLINKED) {
1023                 if (protocol_version >= 30) {
1024                         if (xflags & XMIT_HLINK_FIRST) {
1025                                 F_HL_GNUM(file) = flist->ndx_start + flist->used;
1026                         } else
1027                                 F_HL_GNUM(file) = first_hlink_ndx;
1028                 } else {
1029                         static int32 cnt = 0;
1030                         struct ht_int64_node *np;
1031                         int64 ino;
1032                         int32 ndx;
1033                         if (protocol_version < 26) {
1034                                 dev = read_int(f);
1035                                 ino = read_int(f);
1036                         } else {
1037                                 if (!(xflags & XMIT_SAME_DEV_pre30))
1038                                         dev = read_longint(f);
1039                                 ino = read_longint(f);
1040                         }
1041                         np = idev_find(dev, ino);
1042                         ndx = (int32)(long)np->data - 1;
1043                         if (ndx < 0) {
1044                                 ndx = cnt++;
1045                                 np->data = (void*)(long)cnt;
1046                         }
1047                         F_HL_GNUM(file) = ndx;
1048                 }
1049         }
1050 #endif
1051
1052         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
1053                 if (S_ISREG(mode))
1054                         bp = F_SUM(file);
1055                 else {
1056                         /* Prior to 28, we get a useless set of nulls. */
1057                         bp = tmp_sum;
1058                 }
1059                 if (first_hlink_ndx >= flist->ndx_start) {
1060                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
1061                         memcpy(bp, F_SUM(first), checksum_len);
1062                 } else
1063                         read_buf(f, bp, checksum_len);
1064         }
1065
1066 #ifdef SUPPORT_ACLS
1067         if (preserve_acls && !S_ISLNK(mode))
1068                 receive_acl(file, f);
1069 #endif
1070 #ifdef SUPPORT_XATTRS
1071         if (preserve_xattrs)
1072                 receive_xattr(file, f );
1073 #endif
1074
1075         if (S_ISREG(mode) || S_ISLNK(mode))
1076                 stats.total_size += file_length;
1077
1078         return file;
1079 }
1080
1081 /* Create a file_struct for a named file by reading its stat() information
1082  * and performing extensive checks against global options.
1083  *
1084  * Returns a pointer to the new file struct, or NULL if there was an error
1085  * or this file should be excluded.
1086  *
1087  * Note: Any error (here or in send_file_name) that results in the omission of
1088  * an existent source file from the file list should set
1089  * "io_error |= IOERR_GENERAL" to avoid deletion of the file from the
1090  * destination if --delete is on. */
1091 struct file_struct *make_file(const char *fname, struct file_list *flist,
1092                               STRUCT_STAT *stp, int flags, int filter_level)
1093 {
1094         static char *lastdir;
1095         static int lastdir_len = -1;
1096         struct file_struct *file;
1097         char thisname[MAXPATHLEN];
1098         char linkname[MAXPATHLEN];
1099         int alloc_len, basename_len, linkname_len;
1100         int extra_len = file_extra_cnt * EXTRA_LEN;
1101         const char *basename;
1102         alloc_pool_t *pool;
1103         STRUCT_STAT st;
1104         char *bp;
1105
1106         if (strlcpy(thisname, fname, sizeof thisname) >= sizeof thisname) {
1107                 io_error |= IOERR_GENERAL;
1108                 rprintf(FERROR_XFER, "skipping overly long name: %s\n", fname);
1109                 return NULL;
1110         }
1111         clean_fname(thisname, 0);
1112         if (sanitize_paths)
1113                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
1114
1115         if (stp && S_ISDIR(stp->st_mode)) {
1116                 st = *stp; /* Needed for "symlink/." with --relative. */
1117                 *linkname = '\0'; /* make IBM code checker happy */
1118         } else if (readlink_stat(thisname, &st, linkname) != 0) {
1119                 int save_errno = errno;
1120                 /* See if file is excluded before reporting an error. */
1121                 if (filter_level != NO_FILTERS
1122                  && (is_excluded(thisname, 0, filter_level)
1123                   || is_excluded(thisname, 1, filter_level))) {
1124                         if (ignore_perishable && save_errno != ENOENT)
1125                                 non_perishable_cnt++;
1126                         return NULL;
1127                 }
1128                 if (save_errno == ENOENT) {
1129 #ifdef SUPPORT_LINKS
1130                         /* When our options tell us to follow a symlink that
1131                          * points nowhere, tell the user about the symlink
1132                          * instead of giving a "vanished" message.  We only
1133                          * dereference a symlink if one of the --copy*links
1134                          * options was specified, so there's no need for the
1135                          * extra lstat() if one of these options isn't on. */
1136                         if ((copy_links || copy_unsafe_links || copy_dirlinks)
1137                          && x_lstat(thisname, &st, NULL) == 0
1138                          && S_ISLNK(st.st_mode)) {
1139                                 io_error |= IOERR_GENERAL;
1140                                 rprintf(FERROR_XFER, "symlink has no referent: %s\n",
1141                                         full_fname(thisname));
1142                         } else
1143 #endif
1144                         {
1145                                 enum logcode c = am_daemon && protocol_version < 28
1146                                                ? FERROR : FWARNING;
1147                                 io_error |= IOERR_VANISHED;
1148                                 rprintf(c, "file has vanished: %s\n",
1149                                         full_fname(thisname));
1150                         }
1151                 } else {
1152                         io_error |= IOERR_GENERAL;
1153                         rsyserr(FERROR_XFER, save_errno, "readlink_stat(%s) failed",
1154                                 full_fname(thisname));
1155                 }
1156                 return NULL;
1157         }
1158
1159         if (filter_level == NO_FILTERS)
1160                 goto skip_filters;
1161
1162         if (S_ISDIR(st.st_mode)) {
1163                 if (!xfer_dirs) {
1164                         rprintf(FINFO, "skipping directory %s\n", thisname);
1165                         return NULL;
1166                 }
1167                 /* -x only affects dirs because we need to avoid recursing
1168                  * into a mount-point directory, not to avoid copying a
1169                  * symlinked file if -L (or similar) was specified. */
1170                 if (one_file_system && st.st_dev != filesystem_dev
1171                  && BITS_SETnUNSET(flags, FLAG_CONTENT_DIR, FLAG_TOP_DIR)) {
1172                         if (one_file_system > 1) {
1173                                 if (INFO_GTE(MOUNT, 1)) {
1174                                         rprintf(FINFO,
1175                                             "[%s] skipping mount-point dir %s\n",
1176                                             who_am_i(), thisname);
1177                                 }
1178                                 return NULL;
1179                         }
1180                         flags |= FLAG_MOUNT_DIR;
1181                         flags &= ~FLAG_CONTENT_DIR;
1182                 }
1183         } else
1184                 flags &= ~FLAG_CONTENT_DIR;
1185
1186         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level)) {
1187                 if (ignore_perishable)
1188                         non_perishable_cnt++;
1189                 return NULL;
1190         }
1191
1192         if (lp_ignore_nonreadable(module_id)) {
1193 #ifdef SUPPORT_LINKS
1194                 if (!S_ISLNK(st.st_mode))
1195 #endif
1196                         if (access(thisname, R_OK) != 0)
1197                                 return NULL;
1198         }
1199
1200   skip_filters:
1201
1202         /* Only divert a directory in the main transfer. */
1203         if (flist) {
1204                 if (flist->prev && S_ISDIR(st.st_mode)
1205                  && flags & FLAG_DIVERT_DIRS) {
1206                         /* Room for parent/sibling/next-child info. */
1207                         extra_len += DIRNODE_EXTRA_CNT * EXTRA_LEN;
1208                         if (relative_paths)
1209                                 extra_len += PTR_EXTRA_CNT * EXTRA_LEN;
1210                         pool = dir_flist->file_pool;
1211                 } else
1212                         pool = flist->file_pool;
1213         } else {
1214 #ifdef SUPPORT_ACLS
1215                 /* Directories need an extra int32 for the default ACL. */
1216                 if (preserve_acls && S_ISDIR(st.st_mode))
1217                         extra_len += EXTRA_LEN;
1218 #endif
1219                 pool = NULL;
1220         }
1221
1222         if (DEBUG_GTE(FLIST, 2)) {
1223                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
1224                         who_am_i(), thisname, filter_level);
1225         }
1226
1227         if ((basename = strrchr(thisname, '/')) != NULL) {
1228                 int len = basename++ - thisname;
1229                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
1230                         lastdir = new_array(char, len + 1);
1231                         memcpy(lastdir, thisname, len);
1232                         lastdir[len] = '\0';
1233                         lastdir_len = len;
1234                 }
1235         } else
1236                 basename = thisname;
1237         basename_len = strlen(basename) + 1; /* count the '\0' */
1238
1239 #ifdef SUPPORT_LINKS
1240         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
1241 #else
1242         linkname_len = 0;
1243 #endif
1244
1245 #if SIZEOF_CAPITAL_OFF_T >= 8
1246         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
1247                 extra_len += EXTRA_LEN;
1248 #endif
1249
1250         if (always_checksum && am_sender && S_ISREG(st.st_mode)) {
1251                 file_checksum(thisname, tmp_sum, st.st_size);
1252                 if (sender_keeps_checksum)
1253                         extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
1254         }
1255
1256 #if EXTRA_ROUNDING > 0
1257         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
1258                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
1259 #endif
1260
1261         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
1262                   + linkname_len;
1263         if (pool)
1264                 bp = pool_alloc(pool, alloc_len, "make_file");
1265         else {
1266                 if (!(bp = new_array(char, alloc_len)))
1267                         out_of_memory("make_file");
1268         }
1269
1270         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
1271         bp += extra_len;
1272         file = (struct file_struct *)bp;
1273         bp += FILE_STRUCT_LEN;
1274
1275         memcpy(bp, basename, basename_len);
1276
1277 #ifdef SUPPORT_HARD_LINKS
1278         if (preserve_hard_links && flist && flist->prev) {
1279                 if (protocol_version >= 28
1280                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
1281                  : S_ISREG(st.st_mode)) {
1282                         tmp_dev = (int64)st.st_dev + 1;
1283                         tmp_ino = (int64)st.st_ino;
1284                 } else
1285                         tmp_dev = 0;
1286         }
1287 #endif
1288
1289 #ifdef HAVE_STRUCT_STAT_ST_RDEV
1290         if (IS_DEVICE(st.st_mode) || IS_SPECIAL(st.st_mode)) {
1291                 tmp_rdev = st.st_rdev;
1292                 st.st_size = 0;
1293         }
1294 #endif
1295
1296         file->flags = flags;
1297         file->modtime = st.st_mtime;
1298         file->len32 = (uint32)st.st_size;
1299 #if SIZEOF_CAPITAL_OFF_T >= 8
1300         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
1301                 file->flags |= FLAG_LENGTH64;
1302                 OPT_EXTRA(file, 0)->unum = (uint32)(st.st_size >> 32);
1303         }
1304 #endif
1305         file->mode = st.st_mode;
1306         if (uid_ndx) /* Check uid_ndx instead of preserve_uid for del support */
1307                 F_OWNER(file) = st.st_uid;
1308         if (gid_ndx) /* Check gid_ndx instead of preserve_gid for del support */
1309                 F_GROUP(file) = st.st_gid;
1310
1311         if (basename != thisname)
1312                 file->dirname = lastdir;
1313
1314 #ifdef SUPPORT_LINKS
1315         if (linkname_len)
1316                 memcpy(bp + basename_len, linkname, linkname_len);
1317 #endif
1318
1319         if (am_sender)
1320                 F_PATHNAME(file) = pathname;
1321         else if (!pool)
1322                 F_DEPTH(file) = extra_len / EXTRA_LEN;
1323
1324         /* This code is only used by the receiver when it is building
1325          * a list of files for a delete pass. */
1326         if (keep_dirlinks && linkname_len && flist) {
1327                 STRUCT_STAT st2;
1328                 int save_mode = file->mode;
1329                 file->mode = S_IFDIR; /* Find a directory with our name. */
1330                 if (flist_find(dir_flist, file) >= 0
1331                  && x_stat(thisname, &st2, NULL) == 0 && S_ISDIR(st2.st_mode)) {
1332                         file->modtime = st2.st_mtime;
1333                         file->len32 = 0;
1334                         file->mode = st2.st_mode;
1335                         if (uid_ndx)
1336                                 F_OWNER(file) = st2.st_uid;
1337                         if (gid_ndx)
1338                                 F_GROUP(file) = st2.st_gid;
1339                 } else
1340                         file->mode = save_mode;
1341         }
1342
1343         if (basename_len == 0+1) {
1344                 if (!pool)
1345                         unmake_file(file);
1346                 return NULL;
1347         }
1348
1349         if (sender_keeps_checksum && S_ISREG(st.st_mode))
1350                 memcpy(F_SUM(file), tmp_sum, checksum_len);
1351
1352         if (unsort_ndx)
1353                 F_NDX(file) = dir_count;
1354
1355         return file;
1356 }
1357
1358 /* Only called for temporary file_struct entries created by make_file(). */
1359 void unmake_file(struct file_struct *file)
1360 {
1361         free(REQ_EXTRA(file, F_DEPTH(file)));
1362 }
1363
1364 static struct file_struct *send_file_name(int f, struct file_list *flist,
1365                                           const char *fname, STRUCT_STAT *stp,
1366                                           int flags, int filter_level)
1367 {
1368         struct file_struct *file;
1369
1370         file = make_file(fname, flist, stp, flags, filter_level);
1371         if (!file)
1372                 return NULL;
1373
1374         if (chmod_modes && !S_ISLNK(file->mode))
1375                 file->mode = tweak_mode(file->mode, chmod_modes);
1376
1377         if (f >= 0) {
1378                 char fbuf[MAXPATHLEN];
1379 #ifdef SUPPORT_LINKS
1380                 const char *symlink_name;
1381                 int symlink_len;
1382 #ifdef ICONV_OPTION
1383                 char symlink_buf[MAXPATHLEN];
1384 #endif
1385 #endif
1386 #if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
1387                 stat_x sx;
1388 #endif
1389
1390 #ifdef SUPPORT_LINKS
1391                 if (preserve_links && S_ISLNK(file->mode)) {
1392                         symlink_name = F_SYMLINK(file);
1393                         symlink_len = strlen(symlink_name);
1394                 } else {
1395                         symlink_name = NULL;
1396                         symlink_len = 0;
1397                 }
1398 #endif
1399
1400 #ifdef ICONV_OPTION
1401                 if (ic_send != (iconv_t)-1) {
1402                         xbuf outbuf, inbuf;
1403
1404                         INIT_CONST_XBUF(outbuf, fbuf);
1405
1406                         if (file->dirname) {
1407                                 INIT_XBUF_STRLEN(inbuf, (char*)file->dirname);
1408                                 outbuf.size -= 2; /* Reserve room for '/' & 1 more char. */
1409                                 if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0)
1410                                         goto convert_error;
1411                                 outbuf.size += 2;
1412                                 fbuf[outbuf.len++] = '/';
1413                         }
1414
1415                         INIT_XBUF_STRLEN(inbuf, (char*)file->basename);
1416                         if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0) {
1417                           convert_error:
1418                                 io_error |= IOERR_GENERAL;
1419                                 rprintf(FERROR_XFER,
1420                                     "[%s] cannot convert filename: %s (%s)\n",
1421                                     who_am_i(), f_name(file, fbuf), strerror(errno));
1422                                 return NULL;
1423                         }
1424                         fbuf[outbuf.len] = '\0';
1425
1426 #ifdef SUPPORT_LINKS
1427                         if (symlink_len && sender_symlink_iconv) {
1428                                 INIT_XBUF(inbuf, (char*)symlink_name, symlink_len, (size_t)-1);
1429                                 INIT_CONST_XBUF(outbuf, symlink_buf);
1430                                 if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0) {
1431                                         io_error |= IOERR_GENERAL;
1432                                         f_name(file, fbuf);
1433                                         rprintf(FERROR_XFER,
1434                                             "[%s] cannot convert symlink data for: %s (%s)\n",
1435                                             who_am_i(), full_fname(fbuf), strerror(errno));
1436                                         return NULL;
1437                                 }
1438                                 symlink_buf[outbuf.len] = '\0';
1439
1440                                 symlink_name = symlink_buf;
1441                                 symlink_len = outbuf.len;
1442                         }
1443 #endif
1444                 } else
1445 #endif
1446                         f_name(file, fbuf);
1447
1448 #ifdef SUPPORT_ACLS
1449                 if (preserve_acls && !S_ISLNK(file->mode)) {
1450                         sx.st.st_mode = file->mode;
1451                         sx.acc_acl = sx.def_acl = NULL;
1452                         if (get_acl(fname, &sx) < 0) {
1453                                 io_error |= IOERR_GENERAL;
1454                                 return NULL;
1455                         }
1456                 }
1457 #endif
1458 #ifdef SUPPORT_XATTRS
1459                 if (preserve_xattrs) {
1460                         sx.xattr = NULL;
1461                         if (get_xattr(fname, &sx) < 0) {
1462                                 io_error |= IOERR_GENERAL;
1463                                 return NULL;
1464                         }
1465                 }
1466 #endif
1467
1468                 send_file_entry(f, fbuf, file,
1469 #ifdef SUPPORT_LINKS
1470                                 symlink_name, symlink_len,
1471 #endif
1472                                 flist->used, flist->ndx_start);
1473
1474 #ifdef SUPPORT_ACLS
1475                 if (preserve_acls && !S_ISLNK(file->mode)) {
1476                         send_acl(&sx, f);
1477                         free_acl(&sx);
1478                 }
1479 #endif
1480 #ifdef SUPPORT_XATTRS
1481                 if (preserve_xattrs) {
1482                         F_XATTR(file) = send_xattr(&sx, f);
1483                         free_xattr(&sx);
1484                 }
1485 #endif
1486         }
1487
1488         maybe_emit_filelist_progress(flist->used + flist_count_offset);
1489
1490         flist_expand(flist, 1);
1491         flist->files[flist->used++] = file;
1492
1493         return file;
1494 }
1495
1496 static void send_if_directory(int f, struct file_list *flist,
1497                               struct file_struct *file,
1498                               char *fbuf, unsigned int ol,
1499                               int flags)
1500 {
1501         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1502
1503         if (S_ISDIR(file->mode)
1504             && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) {
1505                 void *save_filters;
1506                 unsigned int len = strlen(fbuf);
1507                 if (len > 1 && fbuf[len-1] == '/')
1508                         fbuf[--len] = '\0';
1509                 if (len >= MAXPATHLEN - 1) {
1510                         io_error |= IOERR_GENERAL;
1511                         rprintf(FERROR_XFER, "skipping long-named directory: %s\n",
1512                                 full_fname(fbuf));
1513                         return;
1514                 }
1515                 save_filters = push_local_filters(fbuf, len);
1516                 send_directory(f, flist, fbuf, len, flags);
1517                 pop_local_filters(save_filters);
1518                 fbuf[ol] = '\0';
1519                 if (is_dot_dir)
1520                         fbuf[ol-1] = '.';
1521         }
1522 }
1523
1524 static int file_compare(const void *file1, const void *file2)
1525 {
1526         return f_name_cmp(*(struct file_struct **)file1,
1527                           *(struct file_struct **)file2);
1528 }
1529
1530 /* The guts of a merge-sort algorithm.  This was derived from the glibc
1531  * version, but I (Wayne) changed the merge code to do less copying and
1532  * to require only half the amount of temporary memory. */
1533 static void fsort_tmp(struct file_struct **fp, size_t num,
1534                       struct file_struct **tmp)
1535 {
1536         struct file_struct **f1, **f2, **t;
1537         size_t n1, n2;
1538
1539         n1 = num / 2;
1540         n2 = num - n1;
1541         f1 = fp;
1542         f2 = fp + n1;
1543
1544         if (n1 > 1)
1545                 fsort_tmp(f1, n1, tmp);
1546         if (n2 > 1)
1547                 fsort_tmp(f2, n2, tmp);
1548
1549         while (f_name_cmp(*f1, *f2) <= 0) {
1550                 if (!--n1)
1551                         return;
1552                 f1++;
1553         }
1554
1555         t = tmp;
1556         memcpy(t, f1, n1 * PTR_SIZE);
1557
1558         *f1++ = *f2++, n2--;
1559
1560         while (n1 > 0 && n2 > 0) {
1561                 if (f_name_cmp(*t, *f2) <= 0)
1562                         *f1++ = *t++, n1--;
1563                 else
1564                         *f1++ = *f2++, n2--;
1565         }
1566
1567         if (n1 > 0)
1568                 memcpy(f1, t, n1 * PTR_SIZE);
1569 }
1570
1571 /* This file-struct sorting routine makes sure that any identical names in
1572  * the file list stay in the same order as they were in the original list.
1573  * This is particularly vital in inc_recurse mode where we expect a sort
1574  * on the flist to match the exact order of a sort on the dir_flist. */
1575 static void fsort(struct file_struct **fp, size_t num)
1576 {
1577         if (num <= 1)
1578                 return;
1579
1580         if (use_qsort)
1581                 qsort(fp, num, PTR_SIZE, file_compare);
1582         else {
1583                 struct file_struct **tmp = new_array(struct file_struct *,
1584                                                      (num+1) / 2);
1585                 fsort_tmp(fp, num, tmp);
1586                 free(tmp);
1587         }
1588 }
1589
1590 /* We take an entire set of sibling dirs from the sorted flist and link them
1591  * into the tree, setting the appropriate parent/child/sibling pointers. */
1592 static void add_dirs_to_tree(int parent_ndx, struct file_list *from_flist,
1593                              int dir_cnt)
1594 {
1595         int i;
1596         int32 *dp = NULL;
1597         int32 *parent_dp = parent_ndx < 0 ? NULL
1598                          : F_DIR_NODE_P(dir_flist->sorted[parent_ndx]);
1599
1600         flist_expand(dir_flist, dir_cnt);
1601         dir_flist->sorted = dir_flist->files;
1602
1603         for (i = 0; dir_cnt; i++) {
1604                 struct file_struct *file = from_flist->sorted[i];
1605
1606                 if (!S_ISDIR(file->mode))
1607                         continue;
1608
1609                 dir_flist->files[dir_flist->used++] = file;
1610                 dir_cnt--;
1611
1612                 if (file->basename[0] == '.' && file->basename[1] == '\0')
1613                         continue;
1614
1615                 if (dp)
1616                         DIR_NEXT_SIBLING(dp) = dir_flist->used - 1;
1617                 else if (parent_dp)
1618                         DIR_FIRST_CHILD(parent_dp) = dir_flist->used - 1;
1619                 else
1620                         send_dir_ndx = dir_flist->used - 1;
1621
1622                 dp = F_DIR_NODE_P(file);
1623                 DIR_PARENT(dp) = parent_ndx;
1624                 DIR_FIRST_CHILD(dp) = -1;
1625         }
1626         if (dp)
1627                 DIR_NEXT_SIBLING(dp) = -1;
1628 }
1629
1630 /* This function is normally called by the sender, but the receiving side also
1631  * calls it from get_dirlist() with f set to -1 so that we just construct the
1632  * file list in memory without sending it over the wire.  Also, get_dirlist()
1633  * might call this with f set to -2, which also indicates that local filter
1634  * rules should be ignored. */
1635 static void send_directory(int f, struct file_list *flist, char *fbuf, int len,
1636                            int flags)
1637 {
1638         struct dirent *di;
1639         unsigned remainder;
1640         char *p;
1641         DIR *d;
1642         int divert_dirs = (flags & FLAG_DIVERT_DIRS) != 0;
1643         int start = flist->used;
1644         int filter_level = f == -2 ? SERVER_FILTERS : ALL_FILTERS;
1645
1646         assert(flist != NULL);
1647
1648         if (!(d = opendir(fbuf))) {
1649                 io_error |= IOERR_GENERAL;
1650                 rsyserr(FERROR_XFER, errno, "opendir %s failed", full_fname(fbuf));
1651                 return;
1652         }
1653
1654         p = fbuf + len;
1655         if (len != 1 || *fbuf != '/')
1656                 *p++ = '/';
1657         *p = '\0';
1658         remainder = MAXPATHLEN - (p - fbuf);
1659
1660         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1661                 char *dname = d_name(di);
1662                 if (dname[0] == '.' && (dname[1] == '\0'
1663                     || (dname[1] == '.' && dname[2] == '\0')))
1664                         continue;
1665                 if (strlcpy(p, dname, remainder) >= remainder) {
1666                         io_error |= IOERR_GENERAL;
1667                         rprintf(FERROR_XFER,
1668                                 "cannot send long-named file %s\n",
1669                                 full_fname(fbuf));
1670                         continue;
1671                 }
1672                 if (dname[0] == '\0') {
1673                         io_error |= IOERR_GENERAL;
1674                         rprintf(FERROR_XFER,
1675                                 "cannot send file with empty name in %s\n",
1676                                 full_fname(fbuf));
1677                         continue;
1678                 }
1679
1680                 send_file_name(f, flist, fbuf, NULL, flags, filter_level);
1681         }
1682
1683         fbuf[len] = '\0';
1684
1685         if (errno) {
1686                 io_error |= IOERR_GENERAL;
1687                 rsyserr(FERROR_XFER, errno, "readdir(%s)", full_fname(fbuf));
1688         }
1689
1690         closedir(d);
1691
1692         if (f >= 0 && recurse && !divert_dirs) {
1693                 int i, end = flist->used - 1;
1694                 /* send_if_directory() bumps flist->used, so use "end". */
1695                 for (i = start; i <= end; i++)
1696                         send_if_directory(f, flist, flist->files[i], fbuf, len, flags);
1697         }
1698 }
1699
1700 static void send_implied_dirs(int f, struct file_list *flist, char *fname,
1701                               char *start, char *limit, int flags, char name_type)
1702 {
1703         static char lastpath[MAXPATHLEN] = "";
1704         static int lastpath_len = 0;
1705         static struct file_struct *lastpath_struct = NULL;
1706         struct file_struct *file;
1707         item_list *relname_list;
1708         relnamecache **rnpp;
1709         int len, need_new_dir, depth = 0;
1710         struct filter_list_struct save_filter_list = filter_list;
1711
1712         flags = (flags | FLAG_IMPLIED_DIR) & ~(FLAG_TOP_DIR | FLAG_CONTENT_DIR);
1713         filter_list.head = filter_list.tail = NULL; /* Don't filter implied dirs. */
1714
1715         if (inc_recurse) {
1716                 if (lastpath_struct && F_PATHNAME(lastpath_struct) == pathname
1717                  && lastpath_len == limit - fname
1718                  && strncmp(lastpath, fname, lastpath_len) == 0)
1719                         need_new_dir = 0;
1720                 else
1721                         need_new_dir = 1;
1722         } else {
1723                 char *tp = fname, *lp = lastpath;
1724                 /* Skip any initial directories in our path that we
1725                  * have in common with lastpath. */
1726                 assert(start == fname);
1727                 for ( ; ; tp++, lp++) {
1728                         if (tp == limit) {
1729                                 if (*lp == '/' || *lp == '\0')
1730                                         goto done;
1731                                 break;
1732                         }
1733                         if (*lp != *tp)
1734                                 break;
1735                         if (*tp == '/') {
1736                                 start = tp;
1737                                 depth++;
1738                         }
1739                 }
1740                 need_new_dir = 1;
1741         }
1742
1743         if (need_new_dir) {
1744                 int save_copy_links = copy_links;
1745                 int save_xfer_dirs = xfer_dirs;
1746                 char *slash;
1747
1748                 copy_links = xfer_dirs = 1;
1749
1750                 *limit = '\0';
1751
1752                 for (slash = start; (slash = strchr(slash+1, '/')) != NULL; ) {
1753                         *slash = '\0';
1754                         file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1755                         depth++;
1756                         if (!inc_recurse && file && S_ISDIR(file->mode))
1757                                 change_local_filter_dir(fname, strlen(fname), depth);
1758                         *slash = '/';
1759                 }
1760
1761                 file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1762                 if (inc_recurse) {
1763                         if (file && !S_ISDIR(file->mode))
1764                                 file = NULL;
1765                         lastpath_struct = file;
1766                 } else if (file && S_ISDIR(file->mode))
1767                         change_local_filter_dir(fname, strlen(fname), ++depth);
1768
1769                 strlcpy(lastpath, fname, sizeof lastpath);
1770                 lastpath_len = limit - fname;
1771
1772                 *limit = '/';
1773
1774                 copy_links = save_copy_links;
1775                 xfer_dirs = save_xfer_dirs;
1776
1777                 if (!inc_recurse)
1778                         goto done;
1779         }
1780
1781         if (!lastpath_struct)
1782                 goto done; /* dir must have vanished */
1783
1784         len = strlen(limit+1);
1785         memcpy(&relname_list, F_DIR_RELNAMES_P(lastpath_struct), sizeof relname_list);
1786         if (!relname_list) {
1787                 if (!(relname_list = new0(item_list)))
1788                         out_of_memory("send_implied_dirs");
1789                 memcpy(F_DIR_RELNAMES_P(lastpath_struct), &relname_list, sizeof relname_list);
1790         }
1791         rnpp = EXPAND_ITEM_LIST(relname_list, relnamecache *, 32);
1792         if (!(*rnpp = (relnamecache*)new_array(char, sizeof (relnamecache) + len)))
1793                 out_of_memory("send_implied_dirs");
1794         (*rnpp)->name_type = name_type;
1795         strlcpy((*rnpp)->fname, limit+1, len + 1);
1796
1797 done:
1798         filter_list = save_filter_list;
1799 }
1800
1801 static void send1extra(int f, struct file_struct *file, struct file_list *flist)
1802 {
1803         char fbuf[MAXPATHLEN];
1804         item_list *relname_list;
1805         int len, dlen, flags = FLAG_DIVERT_DIRS | FLAG_CONTENT_DIR;
1806         size_t j;
1807
1808         f_name(file, fbuf);
1809         dlen = strlen(fbuf);
1810
1811         if (!change_pathname(file, NULL, 0))
1812                 exit_cleanup(RERR_FILESELECT);
1813
1814         change_local_filter_dir(fbuf, dlen, send_dir_depth);
1815
1816         if (file->flags & FLAG_CONTENT_DIR) {
1817                 if (one_file_system) {
1818                         STRUCT_STAT st;
1819                         if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1820                                 io_error |= IOERR_GENERAL;
1821                                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1822                                         full_fname(fbuf));
1823                                 return;
1824                         }
1825                         filesystem_dev = st.st_dev;
1826                 }
1827                 send_directory(f, flist, fbuf, dlen, flags);
1828         }
1829
1830         if (!relative_paths)
1831                 return;
1832
1833         memcpy(&relname_list, F_DIR_RELNAMES_P(file), sizeof relname_list);
1834         if (!relname_list)
1835                 return;
1836
1837         for (j = 0; j < relname_list->count; j++) {
1838                 char *slash;
1839                 relnamecache *rnp = ((relnamecache**)relname_list->items)[j];
1840                 char name_type = rnp->name_type;
1841
1842                 fbuf[dlen] = '/';
1843                 len = strlcpy(fbuf + dlen + 1, rnp->fname, sizeof fbuf - dlen - 1);
1844                 free(rnp);
1845                 if (len >= (int)sizeof fbuf)
1846                         continue; /* Impossible... */
1847
1848                 slash = strchr(fbuf+dlen+1, '/');
1849                 if (slash) {
1850                         send_implied_dirs(f, flist, fbuf, fbuf+dlen+1, slash, flags, name_type);
1851                         continue;
1852                 }
1853
1854                 if (name_type != NORMAL_NAME) {
1855                         STRUCT_STAT st;
1856                         if (link_stat(fbuf, &st, 1) != 0) {
1857                                 io_error |= IOERR_GENERAL;
1858                                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1859                                         full_fname(fbuf));
1860                                 continue;
1861                         }
1862                         send_file_name(f, flist, fbuf, &st, FLAG_TOP_DIR | flags, ALL_FILTERS);
1863                 } else
1864                         send_file_name(f, flist, fbuf, NULL, FLAG_TOP_DIR | flags, ALL_FILTERS);
1865         }
1866
1867         free(relname_list);
1868 }
1869
1870 void send_extra_file_list(int f, int at_least)
1871 {
1872         struct file_list *flist;
1873         int64 start_write;
1874         uint16 prev_flags;
1875         int old_cnt, save_io_error = io_error;
1876
1877         if (flist_eof)
1878                 return;
1879
1880         /* Keep sending data until we have the requested number of
1881          * files in the upcoming file-lists. */
1882         old_cnt = cur_flist->used;
1883         for (flist = first_flist; flist != cur_flist; flist = flist->next)
1884                 old_cnt += flist->used;
1885         while (file_total - old_cnt < at_least) {
1886                 struct file_struct *file = dir_flist->sorted[send_dir_ndx];
1887                 int dir_ndx, dstart = dir_count;
1888                 const char *pathname = F_PATHNAME(file);
1889                 int32 *dp;
1890
1891                 flist = flist_new(0, "send_extra_file_list");
1892                 start_write = stats.total_written;
1893
1894                 if (unsort_ndx)
1895                         dir_ndx = F_NDX(file);
1896                 else
1897                         dir_ndx = send_dir_ndx;
1898                 write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
1899                 flist->parent_ndx = dir_ndx;
1900
1901                 send1extra(f, file, flist);
1902                 prev_flags = file->flags;
1903                 dp = F_DIR_NODE_P(file);
1904
1905                 /* If there are any duplicate directory names that follow, we
1906                  * send all the dirs together in one file-list.  The dir_flist
1907                  * tree links all the child subdirs onto the last dup dir. */
1908                 while ((dir_ndx = DIR_NEXT_SIBLING(dp)) >= 0
1909                     && dir_flist->sorted[dir_ndx]->flags & FLAG_DUPLICATE) {
1910                         send_dir_ndx = dir_ndx;
1911                         file = dir_flist->sorted[dir_ndx];
1912                         /* Try to avoid some duplicate scanning of identical dirs. */
1913                         if (F_PATHNAME(file) == pathname && prev_flags & FLAG_CONTENT_DIR)
1914                                 file->flags &= ~FLAG_CONTENT_DIR;
1915                         send1extra(f, file, flist);
1916                         prev_flags = file->flags;
1917                         dp = F_DIR_NODE_P(file);
1918                 }
1919
1920                 if (protocol_version < 31 || io_error == save_io_error || ignore_errors)
1921                         write_byte(f, 0);
1922                 else {
1923                         write_shortint(f, XMIT_EXTENDED_FLAGS|XMIT_IO_ERROR_ENDLIST);
1924                         write_int(f, io_error);
1925                 }
1926
1927                 if (need_unsorted_flist) {
1928                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
1929                                 out_of_memory("send_extra_file_list");
1930                         memcpy(flist->sorted, flist->files,
1931                                flist->used * sizeof (struct file_struct*));
1932                 } else
1933                         flist->sorted = flist->files;
1934
1935                 flist_sort_and_clean(flist, 0);
1936
1937                 add_dirs_to_tree(send_dir_ndx, flist, dir_count - dstart);
1938                 flist_done_allocating(flist);
1939
1940                 file_total += flist->used;
1941                 stats.flist_size += stats.total_written - start_write;
1942                 stats.num_files += flist->used;
1943                 if (DEBUG_GTE(FLIST, 3))
1944                         output_flist(flist);
1945
1946                 if (DIR_FIRST_CHILD(dp) >= 0) {
1947                         send_dir_ndx = DIR_FIRST_CHILD(dp);
1948                         send_dir_depth++;
1949                 } else {
1950                         while (DIR_NEXT_SIBLING(dp) < 0) {
1951                                 if ((send_dir_ndx = DIR_PARENT(dp)) < 0) {
1952                                         write_ndx(f, NDX_FLIST_EOF);
1953                                         flist_eof = 1;
1954                                         change_local_filter_dir(NULL, 0, 0);
1955                                         goto finish;
1956                                 }
1957                                 send_dir_depth--;
1958                                 file = dir_flist->sorted[send_dir_ndx];
1959                                 dp = F_DIR_NODE_P(file);
1960                         }
1961                         send_dir_ndx = DIR_NEXT_SIBLING(dp);
1962                 }
1963         }
1964
1965   finish:
1966         if (io_error != save_io_error && protocol_version == 30 && !ignore_errors)
1967                 send_msg_int(MSG_IO_ERROR, io_error);
1968 }
1969
1970 struct file_list *send_file_list(int f, int argc, char *argv[])
1971 {
1972         static const char *lastdir;
1973         static int lastdir_len = -1;
1974         int len, dirlen;
1975         STRUCT_STAT st;
1976         char *p, *dir;
1977         struct file_list *flist;
1978         struct timeval start_tv, end_tv;
1979         int64 start_write;
1980         int use_ff_fd = 0;
1981         int disable_buffering;
1982         int flags = recurse ? FLAG_CONTENT_DIR : 0;
1983         int reading_remotely = filesfrom_host != NULL;
1984         int rl_flags = (reading_remotely ? 0 : RL_DUMP_COMMENTS)
1985 #ifdef ICONV_OPTION
1986                      | (filesfrom_convert ? RL_CONVERT : 0)
1987 #endif
1988                      | (eol_nulls || reading_remotely ? RL_EOL_NULLS : 0);
1989         int implied_dot_dir = 0;
1990
1991         rprintf(FLOG, "building file list\n");
1992         if (show_filelist_p())
1993                 start_filelist_progress("building file list");
1994         else if (inc_recurse && INFO_GTE(FLIST, 1) && !am_server)
1995                 rprintf(FCLIENT, "sending incremental file list\n");
1996
1997         start_write = stats.total_written;
1998         gettimeofday(&start_tv, NULL);
1999
2000         if (!orig_dir)
2001                 orig_dir = strdup(curr_dir);
2002
2003         if (relative_paths && protocol_version >= 30)
2004                 implied_dirs = 1; /* We send flagged implied dirs */
2005
2006 #ifdef SUPPORT_HARD_LINKS
2007         if (preserve_hard_links && protocol_version >= 30 && !cur_flist)
2008                 init_hard_links();
2009 #endif
2010
2011         flist = cur_flist = flist_new(0, "send_file_list");
2012         if (inc_recurse) {
2013                 dir_flist = flist_new(FLIST_TEMP, "send_file_list");
2014                 flags |= FLAG_DIVERT_DIRS;
2015         } else
2016                 dir_flist = cur_flist;
2017
2018         disable_buffering = io_start_buffering_out(f);
2019         if (filesfrom_fd >= 0) {
2020                 if (argv[0] && !change_dir(argv[0], CD_NORMAL)) {
2021                         rsyserr(FERROR_XFER, errno, "change_dir %s failed",
2022                                 full_fname(argv[0]));
2023                         exit_cleanup(RERR_FILESELECT);
2024                 }
2025                 use_ff_fd = 1;
2026         }
2027
2028         while (1) {
2029                 char fbuf[MAXPATHLEN], *fn, name_type;
2030
2031                 if (use_ff_fd) {
2032                         if (read_line(filesfrom_fd, fbuf, sizeof fbuf, rl_flags) == 0)
2033                                 break;
2034                         sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
2035                 } else {
2036                         if (argc-- == 0)
2037                                 break;
2038                         strlcpy(fbuf, *argv++, MAXPATHLEN);
2039                         if (sanitize_paths)
2040                                 sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
2041                 }
2042
2043                 len = strlen(fbuf);
2044                 if (relative_paths) {
2045                         /* We clean up fbuf below. */
2046                         name_type = NORMAL_NAME;
2047                 } else if (!len || fbuf[len - 1] == '/') {
2048                         if (len == 2 && fbuf[0] == '.') {
2049                                 /* Turn "./" into just "." rather than "./." */
2050                                 fbuf[--len] = '\0';
2051                         } else {
2052                                 if (len + 1 >= MAXPATHLEN)
2053                                         overflow_exit("send_file_list");
2054                                 fbuf[len++] = '.';
2055                                 fbuf[len] = '\0';
2056                         }
2057                         name_type = DOTDIR_NAME;
2058                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
2059                     && (len == 2 || fbuf[len-3] == '/')) {
2060                         if (len + 2 >= MAXPATHLEN)
2061                                 overflow_exit("send_file_list");
2062                         fbuf[len++] = '/';
2063                         fbuf[len++] = '.';
2064                         fbuf[len] = '\0';
2065                         name_type = DOTDIR_NAME;
2066                 } else if (fbuf[len-1] == '.' && (len == 1 || fbuf[len-2] == '/'))
2067                         name_type = DOTDIR_NAME;
2068                 else
2069                         name_type = NORMAL_NAME;
2070
2071                 dir = NULL;
2072
2073                 if (!relative_paths) {
2074                         p = strrchr(fbuf, '/');
2075                         if (p) {
2076                                 *p = '\0';
2077                                 if (p == fbuf)
2078                                         dir = "/";
2079                                 else
2080                                         dir = fbuf;
2081                                 len -= p - fbuf + 1;
2082                                 fn = p + 1;
2083                         } else
2084                                 fn = fbuf;
2085                 } else {
2086                         if ((p = strstr(fbuf, "/./")) != NULL) {
2087                                 *p = '\0';
2088                                 if (p == fbuf)
2089                                         dir = "/";
2090                                 else {
2091                                         dir = fbuf;
2092                                         clean_fname(dir, 0);
2093                                 }
2094                                 fn = p + 3;
2095                                 while (*fn == '/')
2096                                         fn++;
2097                                 if (!*fn)
2098                                         *--fn = '\0'; /* ensure room for '.' */
2099                         } else
2100                                 fn = fbuf;
2101                         /* A leading ./ can be used in relative mode to affect
2102                          * the dest dir without its name being in the path. */
2103                         if (*fn == '.' && fn[1] == '/' && !implied_dot_dir) {
2104                                 send_file_name(f, flist, ".", NULL,
2105                                     (flags | FLAG_IMPLIED_DIR) & ~FLAG_CONTENT_DIR,
2106                                     ALL_FILTERS);
2107                                 implied_dot_dir = 1;
2108                         }
2109                         len = clean_fname(fn, CFN_KEEP_TRAILING_SLASH
2110                                             | CFN_DROP_TRAILING_DOT_DIR);
2111                         if (len == 1) {
2112                                 if (fn[0] == '/') {
2113                                         fn = "/.";
2114                                         len = 2;
2115                                         name_type = DOTDIR_NAME;
2116                                 } else if (fn[0] == '.')
2117                                         name_type = DOTDIR_NAME;
2118                         } else if (fn[len-1] == '/') {
2119                                 fn[--len] = '\0';
2120                                 if (len == 1 && *fn == '.')
2121                                         name_type = DOTDIR_NAME;
2122                                 else
2123                                         name_type = SLASH_ENDING_NAME;
2124                         }
2125                         /* Reject a ".." dir in the active part of the path. */
2126                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
2127                                 if ((p[2] == '/' || p[2] == '\0')
2128                                  && (p == fn || p[-1] == '/')) {
2129                                         rprintf(FERROR,
2130                                             "found \"..\" dir in relative path: %s\n",
2131                                             fn);
2132                                         exit_cleanup(RERR_SYNTAX);
2133                                 }
2134                         }
2135                 }
2136
2137                 if (!*fn) {
2138                         len = 1;
2139                         fn = ".";
2140                         name_type = DOTDIR_NAME;
2141                 }
2142
2143                 dirlen = dir ? strlen(dir) : 0;
2144                 if (dirlen != lastdir_len || memcmp(lastdir, dir, dirlen) != 0) {
2145                         if (!change_pathname(NULL, dir, -dirlen))
2146                                 continue;
2147                         lastdir = pathname;
2148                         lastdir_len = pathname_len;
2149                 } else if (!change_pathname(NULL, lastdir, lastdir_len))
2150                         continue;
2151
2152                 if (fn != fbuf)
2153                         memmove(fbuf, fn, len + 1);
2154
2155                 if (link_stat(fbuf, &st, copy_dirlinks || name_type != NORMAL_NAME) != 0
2156                  || (name_type != DOTDIR_NAME && is_daemon_excluded(fbuf, S_ISDIR(st.st_mode)))
2157                  || (relative_paths && path_is_daemon_excluded(fbuf, 1))) {
2158                         io_error |= IOERR_GENERAL;
2159                         rsyserr(FERROR_XFER, errno, "link_stat %s failed",
2160                                 full_fname(fbuf));
2161                         continue;
2162                 }
2163
2164                 /* A dot-dir should not be excluded! */
2165                 if (name_type != DOTDIR_NAME
2166                  && is_excluded(fbuf, S_ISDIR(st.st_mode) != 0, ALL_FILTERS))
2167                         continue;
2168
2169                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
2170                         rprintf(FINFO, "skipping directory %s\n", fbuf);
2171                         continue;
2172                 }
2173
2174                 if (inc_recurse && relative_paths && *fbuf) {
2175                         if ((p = strchr(fbuf+1, '/')) != NULL) {
2176                                 if (p - fbuf == 1 && *fbuf == '.') {
2177                                         if ((fn = strchr(p+1, '/')) != NULL)
2178                                                 p = fn;
2179                                 } else
2180                                         fn = p;
2181                                 send_implied_dirs(f, flist, fbuf, fbuf, p, flags, name_type);
2182                                 if (fn == p)
2183                                         continue;
2184                         }
2185                 } else if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
2186                         /* Send the implied directories at the start of the
2187                          * source spec, so we get their permissions right. */
2188                         send_implied_dirs(f, flist, fbuf, fbuf, p, flags, 0);
2189                 }
2190
2191                 if (one_file_system)
2192                         filesystem_dev = st.st_dev;
2193
2194                 if (recurse || (xfer_dirs && name_type != NORMAL_NAME)) {
2195                         struct file_struct *file;
2196                         file = send_file_name(f, flist, fbuf, &st,
2197                                               FLAG_TOP_DIR | FLAG_CONTENT_DIR | flags,
2198                                               NO_FILTERS);
2199                         if (!file)
2200                                 continue;
2201                         if (inc_recurse) {
2202                                 if (name_type == DOTDIR_NAME) {
2203                                         if (send_dir_depth < 0) {
2204                                                 send_dir_depth = 0;
2205                                                 change_local_filter_dir(fbuf, len, send_dir_depth);
2206                                         }
2207                                         send_directory(f, flist, fbuf, len, flags);
2208                                 }
2209                         } else
2210                                 send_if_directory(f, flist, file, fbuf, len, flags);
2211                 } else
2212                         send_file_name(f, flist, fbuf, &st, flags, NO_FILTERS);
2213         }
2214
2215         gettimeofday(&end_tv, NULL);
2216         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2217                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2218         if (stats.flist_buildtime == 0)
2219                 stats.flist_buildtime = 1;
2220         start_tv = end_tv;
2221
2222         /* Indicate end of file list */
2223         if (protocol_version < 31 || io_error == 0 || ignore_errors)
2224                 write_byte(f, 0);
2225         else {
2226                 write_shortint(f, XMIT_EXTENDED_FLAGS|XMIT_IO_ERROR_ENDLIST);
2227                 write_int(f, io_error);
2228         }
2229
2230 #ifdef SUPPORT_HARD_LINKS
2231         if (preserve_hard_links && protocol_version >= 30 && !inc_recurse)
2232                 idev_destroy();
2233 #endif
2234
2235         if (show_filelist_p())
2236                 finish_filelist_progress(flist);
2237
2238         gettimeofday(&end_tv, NULL);
2239         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2240                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2241
2242         /* When converting names, both sides keep an unsorted file-list array
2243          * because the names will differ on the sending and receiving sides
2244          * (both sides will use the unsorted index number for each item). */
2245
2246         /* Sort the list without removing any duplicates.  This allows the
2247          * receiving side to ask for whatever name it kept.  For incremental
2248          * recursion mode, the sender marks duplicate dirs so that it can
2249          * send them together in a single file-list. */
2250         if (need_unsorted_flist) {
2251                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2252                         out_of_memory("send_file_list");
2253                 memcpy(flist->sorted, flist->files,
2254                        flist->used * sizeof (struct file_struct*));
2255         } else
2256                 flist->sorted = flist->files;
2257         flist_sort_and_clean(flist, 0);
2258         file_total += flist->used;
2259
2260         if (numeric_ids <= 0 && !inc_recurse)
2261                 send_id_list(f);
2262
2263         /* send the io_error flag */
2264         if (protocol_version < 30)
2265                 write_int(f, ignore_errors ? 0 : io_error);
2266         else if (io_error && protocol_version == 30 && !ignore_errors)
2267                 send_msg_int(MSG_IO_ERROR, io_error);
2268
2269         if (disable_buffering)
2270                 io_end_buffering_out();
2271
2272         stats.flist_size = stats.total_written - start_write;
2273         stats.num_files = flist->used;
2274
2275         if (DEBUG_GTE(FLIST, 3))
2276                 output_flist(flist);
2277
2278         if (DEBUG_GTE(FLIST, 2))
2279                 rprintf(FINFO, "send_file_list done\n");
2280
2281         if (inc_recurse) {
2282                 send_dir_depth = 1;
2283                 add_dirs_to_tree(-1, flist, dir_count);
2284                 if (!file_total || strcmp(flist->sorted[flist->low]->basename, ".") != 0)
2285                         flist->parent_ndx = -1;
2286                 flist_done_allocating(flist);
2287                 if (send_dir_ndx < 0) {
2288                         write_ndx(f, NDX_FLIST_EOF);
2289                         flist_eof = 1;
2290                 }
2291                 else if (file_total == 1) {
2292                         /* If we're creating incremental file-lists and there
2293                          * was just 1 item in the first file-list, send 1 more
2294                          * file-list to check if this is a 1-file xfer. */
2295                         send_extra_file_list(f, 1);
2296                 }
2297         }
2298
2299         return flist;
2300 }
2301
2302 struct file_list *recv_file_list(int f)
2303 {
2304         struct file_list *flist;
2305         int dstart, flags;
2306         int64 start_read;
2307
2308         if (!first_flist) {
2309                 if (show_filelist_p())
2310                         start_filelist_progress("receiving file list");
2311                 else if (inc_recurse && INFO_GTE(FLIST, 1) && !am_server)
2312                         rprintf(FCLIENT, "receiving incremental file list\n");
2313                 rprintf(FLOG, "receiving file list\n");
2314         }
2315
2316         start_read = stats.total_read;
2317
2318 #ifdef SUPPORT_HARD_LINKS
2319         if (preserve_hard_links && !first_flist)
2320                 init_hard_links();
2321 #endif
2322
2323         flist = flist_new(0, "recv_file_list");
2324
2325         if (inc_recurse) {
2326                 if (flist->ndx_start == 1)
2327                         dir_flist = flist_new(FLIST_TEMP, "recv_file_list");
2328                 dstart = dir_flist->used;
2329         } else {
2330                 dir_flist = flist;
2331                 dstart = 0;
2332         }
2333
2334         while ((flags = read_byte(f)) != 0) {
2335                 struct file_struct *file;
2336
2337                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
2338                         flags |= read_byte(f) << 8;
2339
2340                 if (flags == (XMIT_EXTENDED_FLAGS|XMIT_IO_ERROR_ENDLIST)) {
2341                         int err;
2342                         if (protocol_version < 31) {
2343                                 rprintf(FERROR, "Invalid flist flag: %x\n", flags);
2344                                 exit_cleanup(RERR_PROTOCOL);
2345                         }
2346                         err = read_int(f);
2347                         if (!ignore_errors)
2348                                 io_error |= err;
2349                         break;
2350                 }
2351
2352                 flist_expand(flist, 1);
2353                 file = recv_file_entry(flist, flags, f);
2354
2355                 if (inc_recurse && S_ISDIR(file->mode)) {
2356                         flist_expand(dir_flist, 1);
2357                         dir_flist->files[dir_flist->used++] = file;
2358                 }
2359
2360                 flist->files[flist->used++] = file;
2361
2362                 maybe_emit_filelist_progress(flist->used);
2363
2364                 if (DEBUG_GTE(FLIST, 2)) {
2365                         char *name = f_name(file, NULL);
2366                         rprintf(FINFO, "recv_file_name(%s)\n", NS(name));
2367                 }
2368         }
2369         file_total += flist->used;
2370
2371         if (DEBUG_GTE(FLIST, 2))
2372                 rprintf(FINFO, "received %d names\n", flist->used);
2373
2374         if (show_filelist_p())
2375                 finish_filelist_progress(flist);
2376
2377         if (need_unsorted_flist) {
2378                 /* Create an extra array of index pointers that we can sort for
2379                  * the generator's use (for wading through the files in sorted
2380                  * order and for calling flist_find()).  We keep the "files"
2381                  * list unsorted for our exchange of index numbers with the
2382                  * other side (since their names may not sort the same). */
2383                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2384                         out_of_memory("recv_file_list");
2385                 memcpy(flist->sorted, flist->files,
2386                        flist->used * sizeof (struct file_struct*));
2387                 if (inc_recurse && dir_flist->used > dstart) {
2388                         static int dir_flist_malloced = 0;
2389                         if (dir_flist_malloced < dir_flist->malloced) {
2390                                 dir_flist->sorted = realloc_array(dir_flist->sorted,
2391                                                         struct file_struct *,
2392                                                         dir_flist->malloced);
2393                                 dir_flist_malloced = dir_flist->malloced;
2394                         }
2395                         memcpy(dir_flist->sorted + dstart, dir_flist->files + dstart,
2396                                (dir_flist->used - dstart) * sizeof (struct file_struct*));
2397                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2398                 }
2399         } else {
2400                 flist->sorted = flist->files;
2401                 if (inc_recurse && dir_flist->used > dstart) {
2402                         dir_flist->sorted = dir_flist->files;
2403                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2404                 }
2405         }
2406
2407         if (inc_recurse)
2408                 flist_done_allocating(flist);
2409         else if (f >= 0)
2410                 recv_id_list(f, flist);
2411
2412         flist_sort_and_clean(flist, relative_paths);
2413
2414         if (protocol_version < 30) {
2415                 /* Recv the io_error flag */
2416                 int err = read_int(f);
2417                 if (!ignore_errors)
2418                         io_error |= err;
2419         } else if (inc_recurse && flist->ndx_start == 1) {
2420                 if (!file_total || strcmp(flist->sorted[flist->low]->basename, ".") != 0)
2421                         flist->parent_ndx = -1;
2422         }
2423
2424         if (DEBUG_GTE(FLIST, 3))
2425                 output_flist(flist);
2426
2427         if (DEBUG_GTE(FLIST, 2))
2428                 rprintf(FINFO, "recv_file_list done\n");
2429
2430         stats.flist_size += stats.total_read - start_read;
2431         stats.num_files += flist->used;
2432
2433         return flist;
2434 }
2435
2436 /* This is only used once by the receiver if the very first file-list
2437  * has exactly one item in it. */
2438 void recv_additional_file_list(int f)
2439 {
2440         struct file_list *flist;
2441         int ndx = read_ndx(f);
2442         if (ndx == NDX_FLIST_EOF) {
2443                 flist_eof = 1;
2444                 change_local_filter_dir(NULL, 0, 0);
2445         } else {
2446                 ndx = NDX_FLIST_OFFSET - ndx;
2447                 if (ndx < 0 || ndx >= dir_flist->used) {
2448                         ndx = NDX_FLIST_OFFSET - ndx;
2449                         rprintf(FERROR,
2450                                 "[%s] Invalid dir index: %d (%d - %d)\n",
2451                                 who_am_i(), ndx, NDX_FLIST_OFFSET,
2452                                 NDX_FLIST_OFFSET - dir_flist->used + 1);
2453                         exit_cleanup(RERR_PROTOCOL);
2454                 }
2455                 if (DEBUG_GTE(FLIST, 3)) {
2456                         rprintf(FINFO, "[%s] receiving flist for dir %d\n",
2457                                 who_am_i(), ndx);
2458                 }
2459                 flist = recv_file_list(f);
2460                 flist->parent_ndx = ndx;
2461         }
2462 }
2463
2464 /* Search for an identically-named item in the file list.  Note that the
2465  * items must agree in their directory-ness, or no match is returned. */
2466 int flist_find(struct file_list *flist, struct file_struct *f)
2467 {
2468         int low = flist->low, high = flist->high;
2469         int diff, mid, mid_up;
2470
2471         while (low <= high) {
2472                 mid = (low + high) / 2;
2473                 if (F_IS_ACTIVE(flist->sorted[mid]))
2474                         mid_up = mid;
2475                 else {
2476                         /* Scan for the next non-empty entry using the cached
2477                          * distance values.  If the value isn't fully up-to-
2478                          * date, update it. */
2479                         mid_up = mid + F_DEPTH(flist->sorted[mid]);
2480                         if (!F_IS_ACTIVE(flist->sorted[mid_up])) {
2481                                 do {
2482                                     mid_up += F_DEPTH(flist->sorted[mid_up]);
2483                                 } while (!F_IS_ACTIVE(flist->sorted[mid_up]));
2484                                 F_DEPTH(flist->sorted[mid]) = mid_up - mid;
2485                         }
2486                         if (mid_up > high) {
2487                                 /* If there's nothing left above us, set high to
2488                                  * a non-empty entry below us and continue. */
2489                                 high = mid - (int)flist->sorted[mid]->len32;
2490                                 if (!F_IS_ACTIVE(flist->sorted[high])) {
2491                                         do {
2492                                             high -= (int)flist->sorted[high]->len32;
2493                                         } while (!F_IS_ACTIVE(flist->sorted[high]));
2494                                         flist->sorted[mid]->len32 = mid - high;
2495                                 }
2496                                 continue;
2497                         }
2498                 }
2499                 diff = f_name_cmp(flist->sorted[mid_up], f);
2500                 if (diff == 0) {
2501                         if (protocol_version < 29
2502                             && S_ISDIR(flist->sorted[mid_up]->mode)
2503                             != S_ISDIR(f->mode))
2504                                 return -1;
2505                         return mid_up;
2506                 }
2507                 if (diff < 0)
2508                         low = mid_up + 1;
2509                 else
2510                         high = mid - 1;
2511         }
2512         return -1;
2513 }
2514
2515 /*
2516  * Free up any resources a file_struct has allocated
2517  * and clear the file.
2518  */
2519 void clear_file(struct file_struct *file)
2520 {
2521         /* The +1 zeros out the first char of the basename. */
2522         memset(file, 0, FILE_STRUCT_LEN + 1);
2523         /* In an empty entry, F_DEPTH() is an offset to the next non-empty
2524          * entry.  Likewise for len32 in the opposite direction.  We assume
2525          * that we're alone for now since flist_find() will adjust the counts
2526          * it runs into that aren't up-to-date. */
2527         file->len32 = F_DEPTH(file) = 1;
2528 }
2529
2530 /* Allocate a new file list. */
2531 struct file_list *flist_new(int flags, char *msg)
2532 {
2533         struct file_list *flist;
2534
2535         if (!(flist = new0(struct file_list)))
2536                 out_of_memory(msg);
2537
2538         if (flags & FLIST_TEMP) {
2539                 if (!(flist->file_pool = pool_create(SMALL_EXTENT, 0,
2540                                                      out_of_memory,
2541                                                      POOL_INTERN)))
2542                         out_of_memory(msg);
2543         } else {
2544                 /* This is a doubly linked list with prev looping back to
2545                  * the end of the list, but the last next pointer is NULL. */
2546                 if (!first_flist) {
2547                         flist->file_pool = pool_create(NORMAL_EXTENT, 0,
2548                                                        out_of_memory,
2549                                                        POOL_INTERN);
2550                         if (!flist->file_pool)
2551                                 out_of_memory(msg);
2552
2553                         flist->ndx_start = flist->flist_num = inc_recurse ? 1 : 0;
2554
2555                         first_flist = cur_flist = flist->prev = flist;
2556                 } else {
2557                         struct file_list *prev = first_flist->prev;
2558
2559                         flist->file_pool = first_flist->file_pool;
2560
2561                         flist->ndx_start = prev->ndx_start + prev->used + 1;
2562                         flist->flist_num = prev->flist_num + 1;
2563
2564                         flist->prev = prev;
2565                         prev->next = first_flist->prev = flist;
2566                 }
2567                 flist->pool_boundary = pool_boundary(flist->file_pool, 0);
2568                 flist_cnt++;
2569         }
2570
2571         return flist;
2572 }
2573
2574 /* Free up all elements in a flist. */
2575 void flist_free(struct file_list *flist)
2576 {
2577         if (!flist->prev) {
2578                 /* Was FLIST_TEMP dir-list. */
2579         } else if (flist == flist->prev) {
2580                 first_flist = cur_flist = NULL;
2581                 file_total = 0;
2582                 flist_cnt = 0;
2583         } else {
2584                 if (flist == cur_flist)
2585                         cur_flist = flist->next;
2586                 if (flist == first_flist)
2587                         first_flist = first_flist->next;
2588                 else {
2589                         flist->prev->next = flist->next;
2590                         if (!flist->next)
2591                                 flist->next = first_flist;
2592                 }
2593                 flist->next->prev = flist->prev;
2594                 file_total -= flist->used;
2595                 flist_cnt--;
2596         }
2597
2598         if (!flist->prev || !flist_cnt)
2599                 pool_destroy(flist->file_pool);
2600         else
2601                 pool_free_old(flist->file_pool, flist->pool_boundary);
2602
2603         if (flist->sorted && flist->sorted != flist->files)
2604                 free(flist->sorted);
2605         free(flist->files);
2606         free(flist);
2607 }
2608
2609 /* This routine ensures we don't have any duplicate names in our file list.
2610  * duplicate names can cause corruption because of the pipelining. */
2611 static void flist_sort_and_clean(struct file_list *flist, int strip_root)
2612 {
2613         char fbuf[MAXPATHLEN];
2614         int i, prev_i;
2615
2616         if (!flist)
2617                 return;
2618         if (flist->used == 0) {
2619                 flist->high = -1;
2620                 flist->low = 0;
2621                 return;
2622         }
2623
2624         fsort(flist->sorted, flist->used);
2625
2626         if (!am_sender || inc_recurse) {
2627                 for (i = prev_i = 0; i < flist->used; i++) {
2628                         if (F_IS_ACTIVE(flist->sorted[i])) {
2629                                 prev_i = i;
2630                                 break;
2631                         }
2632                 }
2633                 flist->low = prev_i;
2634         } else {
2635                 i = prev_i = flist->used - 1;
2636                 flist->low = 0;
2637         }
2638
2639         while (++i < flist->used) {
2640                 int j;
2641                 struct file_struct *file = flist->sorted[i];
2642
2643                 if (!F_IS_ACTIVE(file))
2644                         continue;
2645                 if (f_name_cmp(file, flist->sorted[prev_i]) == 0)
2646                         j = prev_i;
2647                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
2648                         int save_mode = file->mode;
2649                         /* Make sure that this directory doesn't duplicate a
2650                          * non-directory earlier in the list. */
2651                         flist->high = prev_i;
2652                         file->mode = S_IFREG;
2653                         j = flist_find(flist, file);
2654                         file->mode = save_mode;
2655                 } else
2656                         j = -1;
2657                 if (j >= 0) {
2658                         int keep, drop;
2659                         /* If one is a dir and the other is not, we want to
2660                          * keep the dir because it might have contents in the
2661                          * list.  Otherwise keep the first one. */
2662                         if (S_ISDIR(file->mode)) {
2663                                 struct file_struct *fp = flist->sorted[j];
2664                                 if (!S_ISDIR(fp->mode))
2665                                         keep = i, drop = j;
2666                                 else {
2667                                         if (am_sender)
2668                                                 file->flags |= FLAG_DUPLICATE;
2669                                         else { /* Make sure we merge our vital flags. */
2670                                                 fp->flags |= file->flags & (FLAG_TOP_DIR|FLAG_CONTENT_DIR);
2671                                                 fp->flags &= file->flags | ~FLAG_IMPLIED_DIR;
2672                                         }
2673                                         keep = j, drop = i;
2674                                 }
2675                         } else
2676                                 keep = j, drop = i;
2677
2678                         if (!am_sender) {
2679                                 if (DEBUG_GTE(DUP, 1)) {
2680                                         rprintf(FINFO,
2681                                             "removing duplicate name %s from file list (%d)\n",
2682                                             f_name(file, fbuf), drop + flist->ndx_start);
2683                                 }
2684                                 clear_file(flist->sorted[drop]);
2685                         }
2686
2687                         if (keep == i) {
2688                                 if (flist->low == drop) {
2689                                         for (j = drop + 1;
2690                                              j < i && !F_IS_ACTIVE(flist->sorted[j]);
2691                                              j++) {}
2692                                         flist->low = j;
2693                                 }
2694                                 prev_i = i;
2695                         }
2696                 } else
2697                         prev_i = i;
2698         }
2699         flist->high = prev_i;
2700
2701         if (strip_root) {
2702                 /* We need to strip off the leading slashes for relative
2703                  * paths, but this must be done _after_ the sorting phase. */
2704                 for (i = flist->low; i <= flist->high; i++) {
2705                         struct file_struct *file = flist->sorted[i];
2706
2707                         if (!file->dirname)
2708                                 continue;
2709                         while (*file->dirname == '/')
2710                                 file->dirname++;
2711                         if (!*file->dirname)
2712                                 file->dirname = NULL;
2713                 }
2714         }
2715
2716         if (prune_empty_dirs && !am_sender) {
2717                 int j, prev_depth = 0;
2718
2719                 prev_i = 0; /* It's OK that this isn't really true. */
2720
2721                 for (i = flist->low; i <= flist->high; i++) {
2722                         struct file_struct *fp, *file = flist->sorted[i];
2723
2724                         /* This temporarily abuses the F_DEPTH() value for a
2725                          * directory that is in a chain that might get pruned.
2726                          * We restore the old value if it gets a reprieve. */
2727                         if (S_ISDIR(file->mode) && F_DEPTH(file)) {
2728                                 /* Dump empty dirs when coming back down. */
2729                                 for (j = prev_depth; j >= F_DEPTH(file); j--) {
2730                                         fp = flist->sorted[prev_i];
2731                                         if (F_DEPTH(fp) >= 0)
2732                                                 break;
2733                                         prev_i = -F_DEPTH(fp)-1;
2734                                         clear_file(fp);
2735                                 }
2736                                 prev_depth = F_DEPTH(file);
2737                                 if (is_excluded(f_name(file, fbuf), 1,
2738                                                        ALL_FILTERS)) {
2739                                         /* Keep dirs through this dir. */
2740                                         for (j = prev_depth-1; ; j--) {
2741                                                 fp = flist->sorted[prev_i];
2742                                                 if (F_DEPTH(fp) >= 0)
2743                                                         break;
2744                                                 prev_i = -F_DEPTH(fp)-1;
2745                                                 F_DEPTH(fp) = j;
2746                                         }
2747                                 } else
2748                                         F_DEPTH(file) = -prev_i-1;
2749                                 prev_i = i;
2750                         } else {
2751                                 /* Keep dirs through this non-dir. */
2752                                 for (j = prev_depth; ; j--) {
2753                                         fp = flist->sorted[prev_i];
2754                                         if (F_DEPTH(fp) >= 0)
2755                                                 break;
2756                                         prev_i = -F_DEPTH(fp)-1;
2757                                         F_DEPTH(fp) = j;
2758                                 }
2759                         }
2760                 }
2761                 /* Dump all remaining empty dirs. */
2762                 while (1) {
2763                         struct file_struct *fp = flist->sorted[prev_i];
2764                         if (F_DEPTH(fp) >= 0)
2765                                 break;
2766                         prev_i = -F_DEPTH(fp)-1;
2767                         clear_file(fp);
2768                 }
2769
2770                 for (i = flist->low; i <= flist->high; i++) {
2771                         if (F_IS_ACTIVE(flist->sorted[i]))
2772                                 break;
2773                 }
2774                 flist->low = i;
2775                 for (i = flist->high; i >= flist->low; i--) {
2776                         if (F_IS_ACTIVE(flist->sorted[i]))
2777                                 break;
2778                 }
2779                 flist->high = i;
2780         }
2781 }
2782
2783 static void output_flist(struct file_list *flist)
2784 {
2785         char uidbuf[16], gidbuf[16], depthbuf[16];
2786         struct file_struct *file;
2787         const char *root, *dir, *slash, *name, *trail;
2788         const char *who = who_am_i();
2789         int i;
2790
2791         rprintf(FINFO, "[%s] flist start=%d, used=%d, low=%d, high=%d\n",
2792                 who, flist->ndx_start, flist->used, flist->low, flist->high);
2793         for (i = 0; i < flist->used; i++) {
2794                 file = flist->files[i];
2795                 if ((am_root || am_sender) && uid_ndx) {
2796                         snprintf(uidbuf, sizeof uidbuf, " uid=%u",
2797                                  F_OWNER(file));
2798                 } else
2799                         *uidbuf = '\0';
2800                 if (gid_ndx) {
2801                         static char parens[] = "(\0)\0\0\0";
2802                         char *pp = parens + (file->flags & FLAG_SKIP_GROUP ? 0 : 3);
2803                         snprintf(gidbuf, sizeof gidbuf, " gid=%s%u%s",
2804                                  pp, F_GROUP(file), pp + 2);
2805                 } else
2806                         *gidbuf = '\0';
2807                 if (!am_sender)
2808                         snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file));
2809                 if (F_IS_ACTIVE(file)) {
2810                         root = am_sender ? NS(F_PATHNAME(file)) : depthbuf;
2811                         if ((dir = file->dirname) == NULL)
2812                                 dir = slash = "";
2813                         else
2814                                 slash = "/";
2815                         name = file->basename;
2816                         trail = S_ISDIR(file->mode) ? "/" : "";
2817                 } else
2818                         root = dir = slash = name = trail = "";
2819                 rprintf(FINFO,
2820                         "[%s] i=%d %s %s%s%s%s mode=0%o len=%s%s%s flags=%x\n",
2821                         who, i + flist->ndx_start,
2822                         root, dir, slash, name, trail,
2823                         (int)file->mode, comma_num(F_LENGTH(file)),
2824                         uidbuf, gidbuf, file->flags);
2825         }
2826 }
2827
2828 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
2829 enum fnc_type { t_PATH, t_ITEM };
2830
2831 static int found_prefix;
2832
2833 /* Compare the names of two file_struct entities, similar to how strcmp()
2834  * would do if it were operating on the joined strings.
2835  *
2836  * Some differences beginning with protocol_version 29: (1) directory names
2837  * are compared with an assumed trailing slash so that they compare in a
2838  * way that would cause them to sort immediately prior to any content they
2839  * may have; (2) a directory of any name compares after a non-directory of
2840  * any name at the same depth; (3) a directory with name "." compares prior
2841  * to anything else.  These changes mean that a directory and a non-dir
2842  * with the same name will not compare as equal (protocol_version >= 29).
2843  *
2844  * The dirname component can be an empty string, but the basename component
2845  * cannot (and never is in the current codebase).  The basename component
2846  * may be NULL (for a removed item), in which case it is considered to be
2847  * after any existing item. */
2848 int f_name_cmp(const struct file_struct *f1, const struct file_struct *f2)
2849 {
2850         int dif;
2851         const uchar *c1, *c2;
2852         enum fnc_state state1, state2;
2853         enum fnc_type type1, type2;
2854         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
2855
2856         if (!f1 || !F_IS_ACTIVE(f1)) {
2857                 if (!f2 || !F_IS_ACTIVE(f2))
2858                         return 0;
2859                 return -1;
2860         }
2861         if (!f2 || !F_IS_ACTIVE(f2))
2862                 return 1;
2863
2864         c1 = (uchar*)f1->dirname;
2865         c2 = (uchar*)f2->dirname;
2866         if (c1 == c2)
2867                 c1 = c2 = NULL;
2868         if (!c1) {
2869                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2870                 c1 = (const uchar*)f1->basename;
2871                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2872                         type1 = t_ITEM;
2873                         state1 = s_TRAILING;
2874                         c1 = (uchar*)"";
2875                 } else
2876                         state1 = s_BASE;
2877         } else {
2878                 type1 = t_path;
2879                 state1 = s_DIR;
2880         }
2881         if (!c2) {
2882                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2883                 c2 = (const uchar*)f2->basename;
2884                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2885                         type2 = t_ITEM;
2886                         state2 = s_TRAILING;
2887                         c2 = (uchar*)"";
2888                 } else
2889                         state2 = s_BASE;
2890         } else {
2891                 type2 = t_path;
2892                 state2 = s_DIR;
2893         }
2894
2895         if (type1 != type2)
2896                 return type1 == t_PATH ? 1 : -1;
2897
2898         do {
2899                 if (!*c1) {
2900                         switch (state1) {
2901                         case s_DIR:
2902                                 state1 = s_SLASH;
2903                                 c1 = (uchar*)"/";
2904                                 break;
2905                         case s_SLASH:
2906                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2907                                 c1 = (const uchar*)f1->basename;
2908                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2909                                         type1 = t_ITEM;
2910                                         state1 = s_TRAILING;
2911                                         c1 = (uchar*)"";
2912                                 } else
2913                                         state1 = s_BASE;
2914                                 break;
2915                         case s_BASE:
2916                                 state1 = s_TRAILING;
2917                                 if (type1 == t_PATH) {
2918                                         c1 = (uchar*)"/";
2919                                         break;
2920                                 }
2921                                 /* FALL THROUGH */
2922                         case s_TRAILING:
2923                                 type1 = t_ITEM;
2924                                 break;
2925                         }
2926                         if (*c2 && type1 != type2)
2927                                 return type1 == t_PATH ? 1 : -1;
2928                 }
2929                 if (!*c2) {
2930                         switch (state2) {
2931                         case s_DIR:
2932                                 state2 = s_SLASH;
2933                                 c2 = (uchar*)"/";
2934                                 break;
2935                         case s_SLASH:
2936                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2937                                 c2 = (const uchar*)f2->basename;
2938                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2939                                         type2 = t_ITEM;
2940                                         state2 = s_TRAILING;
2941                                         c2 = (uchar*)"";
2942                                 } else
2943                                         state2 = s_BASE;
2944                                 break;
2945                         case s_BASE:
2946                                 state2 = s_TRAILING;
2947                                 if (type2 == t_PATH) {
2948                                         c2 = (uchar*)"/";
2949                                         break;
2950                                 }
2951                                 /* FALL THROUGH */
2952                         case s_TRAILING:
2953                                 found_prefix = 1;
2954                                 if (!*c1)
2955                                         return 0;
2956                                 type2 = t_ITEM;
2957                                 break;
2958                         }
2959                         if (type1 != type2)
2960                                 return type1 == t_PATH ? 1 : -1;
2961                 }
2962         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
2963
2964         return dif;
2965 }
2966
2967 /* Returns 1 if f1's filename has all of f2's filename as a prefix.  This does
2968  * not match if f2's basename is not an exact match of a path element in f1.
2969  * E.g. /path/foo is not a prefix of /path/foobar/baz, but /path/foobar is. */
2970 int f_name_has_prefix(const struct file_struct *f1, const struct file_struct *f2)
2971 {
2972         found_prefix = 0;
2973         f_name_cmp(f1, f2);
2974         return found_prefix;
2975 }
2976
2977 char *f_name_buf(void)
2978 {
2979         static char names[5][MAXPATHLEN];
2980         static unsigned int n;
2981
2982         n = (n + 1) % (sizeof names / sizeof names[0]);
2983
2984         return names[n];
2985 }
2986
2987 /* Return a copy of the full filename of a flist entry, using the indicated
2988  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
2989  * done because we checked the size when creating the file_struct entry.
2990  */
2991 char *f_name(const struct file_struct *f, char *fbuf)
2992 {
2993         if (!f || !F_IS_ACTIVE(f))
2994                 return NULL;
2995
2996         if (!fbuf)
2997                 fbuf = f_name_buf();
2998
2999         if (f->dirname) {
3000                 int len = strlen(f->dirname);
3001                 memcpy(fbuf, f->dirname, len);
3002                 fbuf[len] = '/';
3003                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
3004         } else
3005                 strlcpy(fbuf, f->basename, MAXPATHLEN);
3006
3007         return fbuf;
3008 }
3009
3010 /* Do a non-recursive scan of the named directory, possibly ignoring all
3011  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
3012  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
3013  * buffer (the functions we call will append names onto the end, but the old
3014  * dir value will be restored on exit). */
3015 struct file_list *get_dirlist(char *dirname, int dlen, int ignore_filter_rules)
3016 {
3017         struct file_list *dirlist;
3018         char dirbuf[MAXPATHLEN];
3019         int save_recurse = recurse;
3020         int save_xfer_dirs = xfer_dirs;
3021         int save_prune_empty_dirs = prune_empty_dirs;
3022
3023         if (dlen < 0) {
3024                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
3025                 if (dlen >= MAXPATHLEN)
3026                         return NULL;
3027                 dirname = dirbuf;
3028         }
3029
3030         dirlist = flist_new(FLIST_TEMP, "get_dirlist");
3031
3032         recurse = 0;
3033         xfer_dirs = 1;
3034         send_directory(ignore_filter_rules ? -2 : -1, dirlist, dirname, dlen, 0);
3035         xfer_dirs = save_xfer_dirs;
3036         recurse = save_recurse;
3037         if (INFO_GTE(PROGRESS, 1))
3038                 flist_count_offset += dirlist->used;
3039
3040         prune_empty_dirs = 0;
3041         dirlist->sorted = dirlist->files;
3042         flist_sort_and_clean(dirlist, 0);
3043         prune_empty_dirs = save_prune_empty_dirs;
3044
3045         if (DEBUG_GTE(FLIST, 3))
3046                 output_flist(dirlist);
3047
3048         return dirlist;
3049 }