flist.c

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