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 "inums.h"
  27 #include "io.h"
  28
  29 extern int am_root;
  30 extern int am_server;
  31 extern int am_daemon;
  32 extern int am_sender;
  33 extern int am_generator;
  34 extern int inc_recurse;
  35 extern int always_checksum;
  36 extern int module_id;
  37 extern int ignore_errors;
  38 extern int numeric_ids;
  39 extern int recurse;
  40 extern int use_qsort;
  41 extern int xfer_dirs;
  42 extern int filesfrom_fd;
  43 extern int one_file_system;
  44 extern int copy_dirlinks;
  45 extern int keep_dirlinks;
  46 extern int preserve_uid;
  47 extern int preserve_gid;
  48 extern int preserve_acls;
  49 extern int preserve_xattrs;
  50 extern int preserve_links;
  51 extern int preserve_hard_links;
  52 extern int preserve_devices;
  53 extern int preserve_specials;
  54 extern int missing_args;
  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 need_unsorted_flist;
  70 extern int sender_symlink_iconv;
  71 extern int output_needs_newline;
  72 extern int sender_keeps_checksum;
  73 extern int unsort_ndx;
  74 extern struct stats stats;
  75 extern char *filesfrom_host;
  76 extern char *usermap, *groupmap;
  77
  78 extern char curr_dir[MAXPATHLEN];
  79
  80 extern struct chmod_mode_struct *chmod_modes;
  81
  82 extern struct filter_list_struct filter_list;
  83 extern struct filter_list_struct daemon_filter_list;
  84
  85 #ifdef ICONV_OPTION
  86 extern int filesfrom_convert;
  87 extern iconv_t ic_send, ic_recv;
  88 #endif
  89
  90 #define PTR_SIZE (sizeof (struct file_struct *))
  91
  92 int io_error;
  93 int checksum_len;
  94 dev_t filesystem_dev; /* used to implement -x */
  95
  96 struct file_list *cur_flist, *first_flist, *dir_flist;
  97 int send_dir_ndx = -1, send_dir_depth = -1;
  98 int flist_cnt = 0; /* how many (non-tmp) file list objects exist */
  99 int file_total = 0; /* total of all active items over all file-lists */
 100 int flist_eof = 0; /* all the file-lists are now known */
 101
 102 #define NORMAL_NAME 0
 103 #define SLASH_ENDING_NAME 1
 104 #define DOTDIR_NAME 2
 105
 106 /* Starting from protocol version 26, we always use 64-bit ino_t and dev_t
 107  * internally, even if this platform does not allow files to have 64-bit inums.
 108  * The only exception is if we're on a platform with no 64-bit type at all.
 109  *
 110  * Because we use read_longint() to get these off the wire, if you transfer
 111  * devices or (for protocols < 30) hardlinks with dev or inum > 2**32 to a
 112  * machine with no 64-bit types then you will get an overflow error.
 113  *
 114  * Note that if you transfer devices from a 64-bit-devt machine (say, Solaris)
 115  * to a 32-bit-devt machine (say, Linux-2.2/x86) then the device numbers will
 116  * be truncated.  But it's a kind of silly thing to do anyhow. */
 117
 118 /* The tmp_* vars are used as a cache area by make_file() to store data
 119  * that the sender doesn't need to remember in its file list.  The data
 120  * will survive just long enough to be used by send_file_entry(). */
 121 static dev_t tmp_rdev;
 122 #ifdef SUPPORT_HARD_LINKS
 123 static int64 tmp_dev, tmp_ino;
 124 #endif
 125 static char tmp_sum[MAX_DIGEST_LEN];
 126
 127 static char empty_sum[MAX_DIGEST_LEN];
 128 static int flist_count_offset; /* for --delete --progress */
 129
 130 static void flist_sort_and_clean(struct file_list *flist, int strip_root);
 131 static void output_flist(struct file_list *flist);
 132
 133 void init_flist(void)
 134 {
 135         if (DEBUG_GTE(FLIST, 4)) {
 136                 rprintf(FINFO, "FILE_STRUCT_LEN=%d, EXTRA_LEN=%d\n",
 137                         (int)FILE_STRUCT_LEN, (int)EXTRA_LEN);
 138         }
 139         checksum_len = protocol_version < 21 ? 2
 140                      : protocol_version < 30 ? MD4_DIGEST_LEN
 141                      : MD5_DIGEST_LEN;
 142 }
 143
 144 static int show_filelist_p(void)
 145 {
 146         return INFO_GTE(FLIST, 1) && xfer_dirs && !am_server && !inc_recurse;
 147 }
 148
 149 static void start_filelist_progress(char *kind)
 150 {
 151         rprintf(FCLIENT, "%s ... ", kind);
 152         output_needs_newline = 1;
 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 (INFO_GTE(FLIST, 2) && 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 (INFO_GTE(FLIST, 2)) {
 170                 /* This overwrites the progress line */
 171                 rprintf(FINFO, "%d file%sto consider\n",
 172                         flist->used, flist->used == 1 ? " " : "s ");
 173         } else {
 174                 output_needs_newline = 0;
 175                 rprintf(FINFO, "done\n");
 176         }
 177 }
 178
 179 void show_flist_stats(void)
 180 {
 181         /* Nothing yet */
 182 }
 183
 184 /* Stat either a symlink or its referent, depending on the settings of
 185  * copy_links, copy_unsafe_links, etc.  Returns -1 on error, 0 on success.
 186  *
 187  * If path is the name of a symlink, then the linkbuf buffer (which must hold
 188  * MAXPATHLEN chars) will be set to the symlink's target string.
 189  *
 190  * The stat structure pointed to by stp will contain information about the
 191  * link or the referent as appropriate, if they exist. */
 192 static int readlink_stat(const char *path, STRUCT_STAT *stp, char *linkbuf)
 193 {
 194 #ifdef SUPPORT_LINKS
 195         if (link_stat(path, stp, copy_dirlinks) < 0)
 196                 return -1;
 197         if (S_ISLNK(stp->st_mode)) {
 198                 int llen = readlink(path, linkbuf, MAXPATHLEN - 1);
 199                 if (llen < 0)
 200                         return -1;
 201                 linkbuf[llen] = '\0';
 202                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 203                         if (INFO_GTE(SYMSAFE, 1)) {
 204                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 205                                         path, linkbuf);
 206                         }
 207                         return x_stat(path, stp, NULL);
 208                 }
 209                 if (munge_symlinks && am_sender && llen > SYMLINK_PREFIX_LEN
 210                  && strncmp(linkbuf, SYMLINK_PREFIX, SYMLINK_PREFIX_LEN) == 0) {
 211                         memmove(linkbuf, linkbuf + SYMLINK_PREFIX_LEN,
 212                                 llen - SYMLINK_PREFIX_LEN + 1);
 213                 }
 214         }
 215         return 0;
 216 #else
 217         return x_stat(path, stp, NULL);
 218 #endif
 219 }
 220
 221 int link_stat(const char *path, STRUCT_STAT *stp, int follow_dirlinks)
 222 {
 223 #ifdef SUPPORT_LINKS
 224         if (copy_links)
 225                 return x_stat(path, stp, NULL);
 226         if (x_lstat(path, stp, NULL) < 0)
 227                 return -1;
 228         if (follow_dirlinks && S_ISLNK(stp->st_mode)) {
 229                 STRUCT_STAT st;
 230                 if (x_stat(path, &st, NULL) == 0 && S_ISDIR(st.st_mode))
 231                         *stp = st;
 232         }
 233         return 0;
 234 #else
 235         return x_stat(path, stp, NULL);
 236 #endif
 237 }
 238
 239 static inline int is_daemon_excluded(const char *fname, int is_dir)
 240 {
 241         if (daemon_filter_list.head
 242          && check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
 243                 errno = ENOENT;
 244                 return 1;
 245         }
 246         return 0;
 247 }
 248
 249 static inline int path_is_daemon_excluded(char *path, int ignore_filename)
 250 {
 251         if (daemon_filter_list.head) {
 252                 char *slash = path;
 253
 254                 while ((slash = strchr(slash+1, '/')) != NULL) {
 255                         int ret;
 256                         *slash = '\0';
 257                         ret = check_filter(&daemon_filter_list, FLOG, path, 1);
 258                         *slash = '/';
 259                         if (ret < 0) {
 260                                 errno = ENOENT;
 261                                 return 1;
 262                         }
 263                 }
 264
 265                 if (!ignore_filename
 266                  && check_filter(&daemon_filter_list, FLOG, path, 1) < 0) {
 267                         errno = ENOENT;
 268                         return 1;
 269                 }
 270         }
 271
 272         return 0;
 273 }
 274
 275 /* This function is used to check if a file should be included/excluded
 276  * from the list of files based on its name and type etc.  The value of
 277  * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
 278 static int is_excluded(const char *fname, int is_dir, int filter_level)
 279 {
 280 #if 0 /* This currently never happens, so avoid a useless compare. */
 281         if (filter_level == NO_FILTERS)
 282                 return 0;
 283 #endif
 284         if (is_daemon_excluded(fname, is_dir))
 285                 return 1;
 286         if (filter_level != ALL_FILTERS)
 287                 return 0;
 288         if (filter_list.head
 289             && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
 290                 return 1;
 291         return 0;
 292 }
 293
 294 static void send_directory(int f, struct file_list *flist,
 295                            char *fbuf, int len, int flags);
 296
 297 static const char *pathname, *orig_dir;
 298 static int pathname_len;
 299
 300 /* Make sure flist can hold at least flist->used + extra entries. */
 301 static void flist_expand(struct file_list *flist, int extra)
 302 {
 303         struct file_struct **new_ptr;
 304
 305         if (flist->used + extra <= flist->malloced)
 306                 return;
 307
 308         if (flist->malloced < FLIST_START)
 309                 flist->malloced = FLIST_START;
 310         else if (flist->malloced >= FLIST_LINEAR)
 311                 flist->malloced += FLIST_LINEAR;
 312         else
 313                 flist->malloced *= 2;
 314
 315         /* In case count jumped or we are starting the list
 316          * with a known size just set it. */
 317         if (flist->malloced < flist->used + extra)
 318                 flist->malloced = flist->used + extra;
 319
 320         new_ptr = realloc_array(flist->files, struct file_struct *,
 321                                 flist->malloced);
 322
 323         if (DEBUG_GTE(FLIST, 1) && flist->malloced != FLIST_START) {
 324                 rprintf(FCLIENT, "[%s] expand file_list pointer array to %s bytes, did%s move\n",
 325                     who_am_i(),
 326                     big_num(sizeof flist->files[0] * flist->malloced),
 327                     (new_ptr == flist->files) ? " not" : "");
 328         }
 329
 330         flist->files = new_ptr;
 331
 332         if (!flist->files)
 333                 out_of_memory("flist_expand");
 334 }
 335
 336 static void flist_done_allocating(struct file_list *flist)
 337 {
 338         void *ptr = pool_boundary(flist->file_pool, 8*1024);
 339         if (flist->pool_boundary == ptr)
 340                 flist->pool_boundary = NULL; /* list didn't use any pool memory */
 341         else
 342                 flist->pool_boundary = ptr;
 343 }
 344
 345 /* Call this with EITHER (1) "file, NULL, 0" to chdir() to the file's
 346  * F_PATHNAME(), or (2) "NULL, dir, dirlen" to chdir() to the supplied dir,
 347  * with dir == NULL taken to be the starting directory, and dirlen < 0
 348  * indicating that strdup(dir) should be called and then the -dirlen length
 349  * value checked to ensure that it is not daemon-excluded. */
 350 int change_pathname(struct file_struct *file, const char *dir, int dirlen)
 351 {
 352         if (dirlen < 0) {
 353                 char *cpy = strdup(dir);
 354                 if (*cpy != '/')
 355                         change_dir(orig_dir, CD_SKIP_CHDIR);
 356                 if (path_is_daemon_excluded(cpy, 0))
 357                         goto chdir_error;
 358                 dir = cpy;
 359                 dirlen = -dirlen;
 360         } else {
 361                 if (file) {
 362                         if (pathname == F_PATHNAME(file))
 363                                 return 1;
 364                         dir = F_PATHNAME(file);
 365                         if (dir)
 366                                 dirlen = strlen(dir);
 367                 } else if (pathname == dir)
 368                         return 1;
 369                 if (dir && *dir != '/')
 370                         change_dir(orig_dir, CD_SKIP_CHDIR);
 371         }
 372
 373         pathname = dir;
 374         pathname_len = dirlen;
 375
 376         if (!dir)
 377                 dir = orig_dir;
 378
 379         if (!change_dir(dir, CD_NORMAL)) {
 380           chdir_error:
 381                 io_error |= IOERR_GENERAL;
 382                 rsyserr(FERROR_XFER, errno, "change_dir %s failed", full_fname(dir));
 383                 if (dir != orig_dir)
 384                         change_dir(orig_dir, CD_NORMAL);
 385                 pathname = NULL;
 386                 pathname_len = 0;
 387                 return 0;
 388         }
 389
 390         return 1;
 391 }
 392
 393 static void send_file_entry(int f, const char *fname, struct file_struct *file,
 394 #ifdef SUPPORT_LINKS
 395                             const char *symlink_name, int symlink_len,
 396 #endif
 397                             int ndx, int first_ndx)
 398 {
 399         static time_t modtime;
 400         static mode_t mode;
 401 #ifdef SUPPORT_HARD_LINKS
 402         static int64 dev;
 403 #endif
 404         static dev_t rdev;
 405         static uint32 rdev_major;
 406         static uid_t uid;
 407         static gid_t gid;
 408         static const char *user_name, *group_name;
 409         static char lastname[MAXPATHLEN];
 410 #ifdef SUPPORT_HARD_LINKS
 411         int first_hlink_ndx = -1;
 412 #endif
 413         int l1, l2;
 414         int xflags;
 415
 416         /* Initialize starting value of xflags and adjust counts. */
 417         if (S_ISREG(file->mode))
 418                 xflags = 0;
 419         else if (S_ISDIR(file->mode)) {
 420                 stats.num_dirs++;
 421                 if (protocol_version >= 30) {
 422                         if (file->flags & FLAG_CONTENT_DIR)
 423                                 xflags = file->flags & FLAG_TOP_DIR;
 424                         else if (file->flags & FLAG_IMPLIED_DIR)
 425                                 xflags = XMIT_TOP_DIR | XMIT_NO_CONTENT_DIR;
 426                         else
 427                                 xflags = XMIT_NO_CONTENT_DIR;
 428                 } else
 429                         xflags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */
 430         } else {
 431                 if (S_ISLNK(file->mode))
 432                         stats.num_symlinks++;
 433                 else if (IS_DEVICE(file->mode))
 434                         stats.num_devices++;
 435                 else if (IS_SPECIAL(file->mode))
 436                         stats.num_specials++;
 437                 xflags = 0;
 438         }
 439
 440         if (file->mode == mode)
 441                 xflags |= XMIT_SAME_MODE;
 442         else
 443                 mode = file->mode;
 444
 445         if ((preserve_devices && IS_DEVICE(mode))
 446          || (preserve_specials && IS_SPECIAL(mode))) {
 447                 if (protocol_version < 28) {
 448                         if (tmp_rdev == rdev)
 449                                 xflags |= XMIT_SAME_RDEV_pre28;
 450                         else
 451                                 rdev = tmp_rdev;
 452                 } else {
 453                         rdev = tmp_rdev;
 454                         if ((uint32)major(rdev) == rdev_major)
 455                                 xflags |= XMIT_SAME_RDEV_MAJOR;
 456                         else
 457                                 rdev_major = major(rdev);
 458                         if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu)
 459                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
 460                 }
 461         } else if (protocol_version < 28)
 462                 rdev = MAKEDEV(0, 0);
 463         if (!preserve_uid || ((uid_t)F_OWNER(file) == uid && *lastname))
 464                 xflags |= XMIT_SAME_UID;
 465         else {
 466                 uid = F_OWNER(file);
 467                 if (!numeric_ids) {
 468                         user_name = add_uid(uid);
 469                         if (inc_recurse && user_name)
 470                                 xflags |= XMIT_USER_NAME_FOLLOWS;
 471                 }
 472         }
 473         if (!preserve_gid || ((gid_t)F_GROUP(file) == gid && *lastname))
 474                 xflags |= XMIT_SAME_GID;
 475         else {
 476                 gid = F_GROUP(file);
 477                 if (!numeric_ids) {
 478                         group_name = add_gid(gid);
 479                         if (inc_recurse && group_name)
 480                                 xflags |= XMIT_GROUP_NAME_FOLLOWS;
 481                 }
 482         }
 483         if (file->modtime == modtime)
 484                 xflags |= XMIT_SAME_TIME;
 485         else
 486                 modtime = file->modtime;
 487
 488 #ifdef SUPPORT_HARD_LINKS
 489         if (tmp_dev != 0) {
 490                 if (protocol_version >= 30) {
 491                         struct ht_int64_node *np = idev_find(tmp_dev, tmp_ino);
 492                         first_hlink_ndx = (int32)(long)np->data - 1;
 493                         if (first_hlink_ndx < 0) {
 494                                 np->data = (void*)(long)(first_ndx + ndx + 1);
 495                                 xflags |= XMIT_HLINK_FIRST;
 496                         }
 497                         if (DEBUG_GTE(HLINK, 1)) {
 498                                 if (first_hlink_ndx >= 0) {
 499                                         rprintf(FINFO, "[%s] #%d hard-links #%d (%sabbrev)\n",
 500                                                 who_am_i(), first_ndx + ndx, first_hlink_ndx,
 501                                                 first_hlink_ndx >= first_ndx ? "" : "un");
 502                                 } else if (DEBUG_GTE(HLINK, 3)) {
 503                                         rprintf(FINFO, "[%s] dev:inode for #%d is %s:%s\n",
 504                                                 who_am_i(), first_ndx + ndx,
 505                                                 big_num(tmp_dev), big_num(tmp_ino));
 506                                 }
 507                         }
 508                 } else {
 509                         if (tmp_dev == dev) {
 510                                 if (protocol_version >= 28)
 511                                         xflags |= XMIT_SAME_DEV_pre30;
 512                         } else
 513                                 dev = tmp_dev;
 514                 }
 515                 xflags |= XMIT_HLINKED;
 516         }
 517 #endif
 518
 519         for (l1 = 0;
 520             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 521             l1++) {}
 522         l2 = strlen(fname+l1);
 523
 524         if (l1 > 0)
 525                 xflags |= XMIT_SAME_NAME;
 526         if (l2 > 255)
 527                 xflags |= XMIT_LONG_NAME;
 528
 529         /* We must make sure we don't send a zero flag byte or the
 530          * other end will terminate the flist transfer.  Note that
 531          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 532          * it's harmless way to add a bit to the first flag byte. */
 533         if (protocol_version >= 28) {
 534                 if (!xflags && !S_ISDIR(mode))
 535                         xflags |= XMIT_TOP_DIR;
 536                 if ((xflags & 0xFF00) || !xflags) {
 537                         xflags |= XMIT_EXTENDED_FLAGS;
 538                         write_shortint(f, xflags);
 539                 } else
 540                         write_byte(f, xflags);
 541         } else {
 542                 if (!(xflags & 0xFF))
 543                         xflags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
 544                 write_byte(f, xflags);
 545         }
 546         if (xflags & XMIT_SAME_NAME)
 547                 write_byte(f, l1);
 548         if (xflags & XMIT_LONG_NAME)
 549                 write_varint30(f, l2);
 550         else
 551                 write_byte(f, l2);
 552         write_buf(f, fname + l1, l2);
 553
 554 #ifdef SUPPORT_HARD_LINKS
 555         if (first_hlink_ndx >= 0) {
 556                 write_varint(f, first_hlink_ndx);
 557                 if (first_hlink_ndx >= first_ndx)
 558                         goto the_end;
 559         }
 560 #endif
 561
 562         write_varlong30(f, F_LENGTH(file), 3);
 563         if (!(xflags & XMIT_SAME_TIME)) {
 564                 if (protocol_version >= 30)
 565                         write_varlong(f, modtime, 4);
 566                 else
 567                         write_int(f, modtime);
 568         }
 569         if (!(xflags & XMIT_SAME_MODE))
 570                 write_int(f, to_wire_mode(mode));
 571         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
 572                 if (protocol_version < 30)
 573                         write_int(f, uid);
 574                 else {
 575                         write_varint(f, uid);
 576                         if (xflags & XMIT_USER_NAME_FOLLOWS) {
 577                                 int len = strlen(user_name);
 578                                 write_byte(f, len);
 579                                 write_buf(f, user_name, len);
 580                         }
 581                 }
 582         }
 583         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
 584                 if (protocol_version < 30)
 585                         write_int(f, gid);
 586                 else {
 587                         write_varint(f, gid);
 588                         if (xflags & XMIT_GROUP_NAME_FOLLOWS) {
 589                                 int len = strlen(group_name);
 590                                 write_byte(f, len);
 591                                 write_buf(f, group_name, len);
 592                         }
 593                 }
 594         }
 595         if ((preserve_devices && IS_DEVICE(mode))
 596          || (preserve_specials && IS_SPECIAL(mode))) {
 597                 if (protocol_version < 28) {
 598                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 599                                 write_int(f, (int)rdev);
 600                 } else {
 601                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 602                                 write_varint30(f, major(rdev));
 603                         if (protocol_version >= 30)
 604                                 write_varint(f, minor(rdev));
 605                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 606                                 write_byte(f, minor(rdev));
 607                         else
 608                                 write_int(f, minor(rdev));
 609                 }
 610         }
 611
 612 #ifdef SUPPORT_LINKS
 613         if (symlink_len) {
 614                 write_varint30(f, symlink_len);
 615                 write_buf(f, symlink_name, symlink_len);
 616         }
 617 #endif
 618
 619 #ifdef SUPPORT_HARD_LINKS
 620         if (tmp_dev != 0 && protocol_version < 30) {
 621                 if (protocol_version < 26) {
 622                         /* 32-bit dev_t and ino_t */
 623                         write_int(f, (int32)dev);
 624                         write_int(f, (int32)tmp_ino);
 625                 } else {
 626                         /* 64-bit dev_t and ino_t */
 627                         if (!(xflags & XMIT_SAME_DEV_pre30))
 628                                 write_longint(f, dev);
 629                         write_longint(f, tmp_ino);
 630                 }
 631         }
 632 #endif
 633
 634         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 635                 const char *sum;
 636                 if (S_ISREG(mode))
 637                         sum = tmp_sum;
 638                 else {
 639                         /* Prior to 28, we sent a useless set of nulls. */
 640                         sum = empty_sum;
 641                 }
 642                 write_buf(f, sum, checksum_len);
 643         }
 644
 645 #ifdef SUPPORT_HARD_LINKS
 646   the_end:
 647 #endif
 648         strlcpy(lastname, fname, MAXPATHLEN);
 649
 650         if (S_ISREG(mode) || S_ISLNK(mode))
 651                 stats.total_size += F_LENGTH(file);
 652 }
 653
 654 static struct file_struct *recv_file_entry(struct file_list *flist,
 655                                            int xflags, int f)
 656 {
 657         static int64 modtime;
 658         static mode_t mode;
 659 #ifdef SUPPORT_HARD_LINKS
 660         static int64 dev;
 661 #endif
 662         static dev_t rdev;
 663         static uint32 rdev_major;
 664         static uid_t uid;
 665         static gid_t gid;
 666         static uint16 gid_flags;
 667         static char lastname[MAXPATHLEN], *lastdir;
 668         static int lastdir_depth, lastdir_len = -1;
 669         static unsigned int del_hier_name_len = 0;
 670         static int in_del_hier = 0;
 671         char thisname[MAXPATHLEN];
 672         unsigned int l1 = 0, l2 = 0;
 673         int alloc_len, basename_len, linkname_len;
 674         int extra_len = file_extra_cnt * EXTRA_LEN;
 675         int first_hlink_ndx = -1;
 676         int64 file_length;
 677         const char *basename;
 678         struct file_struct *file;
 679         alloc_pool_t *pool;
 680         char *bp;
 681
 682         if (xflags & XMIT_SAME_NAME)
 683                 l1 = read_byte(f);
 684
 685         if (xflags & XMIT_LONG_NAME)
 686                 l2 = read_varint30(f);
 687         else
 688                 l2 = read_byte(f);
 689
 690         if (l2 >= MAXPATHLEN - l1) {
 691                 rprintf(FERROR,
 692                         "overflow: xflags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
 693                         xflags, l1, l2, lastname, who_am_i());
 694                 overflow_exit("recv_file_entry");
 695         }
 696
 697         strlcpy(thisname, lastname, l1 + 1);
 698         read_sbuf(f, &thisname[l1], l2);
 699         thisname[l1 + l2] = 0;
 700
 701         /* Abuse basename_len for a moment... */
 702         basename_len = strlcpy(lastname, thisname, MAXPATHLEN);
 703
 704 #ifdef ICONV_OPTION
 705         if (ic_recv != (iconv_t)-1) {
 706                 xbuf outbuf, inbuf;
 707
 708                 INIT_CONST_XBUF(outbuf, thisname);
 709                 INIT_XBUF(inbuf, lastname, basename_len, (size_t)-1);
 710
 711                 if (iconvbufs(ic_recv, &inbuf, &outbuf, 0) < 0) {
 712                         io_error |= IOERR_GENERAL;
 713                         rprintf(FERROR_UTF8,
 714                             "[%s] cannot convert filename: %s (%s)\n",
 715                             who_am_i(), lastname, strerror(errno));
 716                         outbuf.len = 0;
 717                 }
 718                 thisname[outbuf.len] = '\0';
 719         }
 720 #endif
 721
 722         if (*thisname)
 723                 clean_fname(thisname, 0);
 724
 725         if (sanitize_paths)
 726                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
 727
 728         if ((basename = strrchr(thisname, '/')) != NULL) {
 729                 int len = basename++ - thisname;
 730                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
 731                         lastdir = new_array(char, len + 1);
 732                         memcpy(lastdir, thisname, len);
 733                         lastdir[len] = '\0';
 734                         lastdir_len = len;
 735                         lastdir_depth = count_dir_elements(lastdir);
 736                 }
 737         } else
 738                 basename = thisname;
 739         basename_len = strlen(basename) + 1; /* count the '\0' */
 740
 741 #ifdef SUPPORT_HARD_LINKS
 742         if (protocol_version >= 30
 743          && BITS_SETnUNSET(xflags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
 744                 first_hlink_ndx = read_varint(f);
 745                 if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->ndx_start + flist->used) {
 746                         rprintf(FERROR,
 747                                 "hard-link reference out of range: %d (%d)\n",
 748                                 first_hlink_ndx, flist->ndx_start + flist->used);
 749                         exit_cleanup(RERR_PROTOCOL);
 750                 }
 751                 if (DEBUG_GTE(HLINK, 1)) {
 752                         rprintf(FINFO, "[%s] #%d hard-links #%d (%sabbrev)\n",
 753                                 who_am_i(), flist->used+flist->ndx_start, first_hlink_ndx,
 754                                 first_hlink_ndx >= flist->ndx_start ? "" : "un");
 755                 }
 756                 if (first_hlink_ndx >= flist->ndx_start) {
 757                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 758                         file_length = F_LENGTH(first);
 759                         modtime = first->modtime;
 760                         mode = first->mode;
 761                         if (preserve_uid)
 762                                 uid = F_OWNER(first);
 763                         if (preserve_gid)
 764                                 gid = F_GROUP(first);
 765                         if ((preserve_devices && IS_DEVICE(mode))
 766                          || (preserve_specials && IS_SPECIAL(mode))) {
 767                                 uint32 *devp = F_RDEV_P(first);
 768                                 rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
 769                                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 770                         }
 771                         if (preserve_links && S_ISLNK(mode))
 772                                 linkname_len = strlen(F_SYMLINK(first)) + 1;
 773                         else
 774                                 linkname_len = 0;
 775                         goto create_object;
 776                 }
 777         }
 778 #endif
 779
 780         file_length = read_varlong30(f, 3);
 781         if (!(xflags & XMIT_SAME_TIME)) {
 782                 if (protocol_version >= 30) {
 783                         modtime = read_varlong(f, 4);
 784 #if SIZEOF_TIME_T < SIZEOF_INT64
 785                         if (!am_generator && (int64)(time_t)modtime != modtime) {
 786                                 rprintf(FERROR_XFER,
 787                                     "Time value of %s truncated on receiver.\n",
 788                                     lastname);
 789                         }
 790 #endif
 791                 } else
 792                         modtime = read_int(f);
 793         }
 794         if (!(xflags & XMIT_SAME_MODE))
 795                 mode = from_wire_mode(read_int(f));
 796
 797         if (chmod_modes && !S_ISLNK(mode) && mode)
 798                 mode = tweak_mode(mode, chmod_modes);
 799
 800         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
 801                 if (protocol_version < 30)
 802                         uid = (uid_t)read_int(f);
 803                 else {
 804                         uid = (uid_t)read_varint(f);
 805                         if (xflags & XMIT_USER_NAME_FOLLOWS)
 806                                 uid = recv_user_name(f, uid);
 807                         else if (inc_recurse && am_root && (!numeric_ids || usermap))
 808                                 uid = match_uid(uid);
 809                 }
 810         }
 811         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
 812                 if (protocol_version < 30)
 813                         gid = (gid_t)read_int(f);
 814                 else {
 815                         gid = (gid_t)read_varint(f);
 816                         gid_flags = 0;
 817                         if (xflags & XMIT_GROUP_NAME_FOLLOWS)
 818                                 gid = recv_group_name(f, gid, &gid_flags);
 819                         else if (inc_recurse && (!am_root || !numeric_ids || groupmap))
 820                                 gid = match_gid(gid, &gid_flags);
 821                 }
 822         }
 823
 824         if ((preserve_devices && IS_DEVICE(mode))
 825          || (preserve_specials && IS_SPECIAL(mode))) {
 826                 if (protocol_version < 28) {
 827                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 828                                 rdev = (dev_t)read_int(f);
 829                 } else {
 830                         uint32 rdev_minor;
 831                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 832                                 rdev_major = read_varint30(f);
 833                         if (protocol_version >= 30)
 834                                 rdev_minor = read_varint(f);
 835                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 836                                 rdev_minor = read_byte(f);
 837                         else
 838                                 rdev_minor = read_int(f);
 839                         rdev = MAKEDEV(rdev_major, rdev_minor);
 840                 }
 841                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 842                 file_length = 0;
 843         } else if (protocol_version < 28)
 844                 rdev = MAKEDEV(0, 0);
 845
 846 #ifdef SUPPORT_LINKS
 847         if (preserve_links && S_ISLNK(mode)) {
 848                 linkname_len = read_varint30(f) + 1; /* count the '\0' */
 849                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 850                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 851                                 linkname_len - 1);
 852                         overflow_exit("recv_file_entry");
 853                 }
 854 #ifdef ICONV_OPTION
 855                 /* We don't know how much extra room we need to convert
 856                  * the as-yet-unread symlink data, so let's hope that a
 857                  * double-size buffer is plenty. */
 858                 if (sender_symlink_iconv)
 859                         linkname_len *= 2;
 860 #endif
 861                 if (munge_symlinks)
 862                         linkname_len += SYMLINK_PREFIX_LEN;
 863         }
 864         else
 865 #endif
 866                 linkname_len = 0;
 867
 868 #ifdef SUPPORT_HARD_LINKS
 869   create_object:
 870         if (preserve_hard_links) {
 871                 if (protocol_version < 28 && S_ISREG(mode))
 872                         xflags |= XMIT_HLINKED;
 873                 if (xflags & XMIT_HLINKED)
 874                         extra_len += (inc_recurse+1) * EXTRA_LEN;
 875         }
 876 #endif
 877
 878 #ifdef SUPPORT_ACLS
 879         /* Directories need an extra int32 for the default ACL. */
 880         if (preserve_acls && S_ISDIR(mode))
 881                 extra_len += EXTRA_LEN;
 882 #endif
 883
 884         if (always_checksum && S_ISREG(mode))
 885                 extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
 886
 887 #if SIZEOF_INT64 >= 8
 888         if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
 889                 extra_len += EXTRA_LEN;
 890 #endif
 891         if (file_length < 0) {
 892                 rprintf(FERROR, "Offset underflow: file-length is negative\n");
 893                 exit_cleanup(RERR_UNSUPPORTED);
 894         }
 895
 896         if (inc_recurse && S_ISDIR(mode)) {
 897                 if (one_file_system) {
 898                         /* Room to save the dir's device for -x */
 899                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 900                 }
 901                 pool = dir_flist->file_pool;
 902         } else
 903                 pool = flist->file_pool;
 904
 905 #if EXTRA_ROUNDING > 0
 906         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
 907                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
 908 #endif
 909
 910         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
 911                   + linkname_len;
 912         bp = pool_alloc(pool, alloc_len, "recv_file_entry");
 913
 914         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
 915         bp += extra_len;
 916         file = (struct file_struct *)bp;
 917         bp += FILE_STRUCT_LEN;
 918
 919         memcpy(bp, basename, basename_len);
 920
 921 #ifdef SUPPORT_HARD_LINKS
 922         if (xflags & XMIT_HLINKED)
 923                 file->flags |= FLAG_HLINKED;
 924 #endif
 925         file->modtime = (time_t)modtime;
 926         file->len32 = (uint32)file_length;
 927 #if SIZEOF_INT64 >= 8
 928         if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
 929 #if SIZEOF_CAPITAL_OFF_T < 8
 930                 rprintf(FERROR, "Offset overflow: attempted 64-bit file-length\n");
 931                 exit_cleanup(RERR_UNSUPPORTED);
 932 #else
 933                 file->flags |= FLAG_LENGTH64;
 934                 OPT_EXTRA(file, 0)->unum = (uint32)(file_length >> 32);
 935 #endif
 936         }
 937 #endif
 938         file->mode = mode;
 939         if (preserve_uid)
 940                 F_OWNER(file) = uid;
 941         if (preserve_gid) {
 942                 F_GROUP(file) = gid;
 943                 file->flags |= gid_flags;
 944         }
 945         if (unsort_ndx)
 946                 F_NDX(file) = flist->used + flist->ndx_start;
 947
 948         if (basename != thisname) {
 949                 file->dirname = lastdir;
 950                 F_DEPTH(file) = lastdir_depth + 1;
 951         } else
 952                 F_DEPTH(file) = 1;
 953
 954         if (S_ISDIR(mode)) {
 955                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
 956                         F_DEPTH(file)--;
 957                 if (protocol_version >= 30) {
 958                         if (!(xflags & XMIT_NO_CONTENT_DIR)) {
 959                                 if (xflags & XMIT_TOP_DIR)
 960                                         file->flags |= FLAG_TOP_DIR;
 961                                 file->flags |= FLAG_CONTENT_DIR;
 962                         } else if (xflags & XMIT_TOP_DIR)
 963                                 file->flags |= FLAG_IMPLIED_DIR;
 964                 } else if (xflags & XMIT_TOP_DIR) {
 965                         in_del_hier = recurse;
 966                         del_hier_name_len = F_DEPTH(file) == 0 ? 0 : l1 + l2;
 967                         if (relative_paths && del_hier_name_len > 2
 968                             && lastname[del_hier_name_len-1] == '.'
 969                             && lastname[del_hier_name_len-2] == '/')
 970                                 del_hier_name_len -= 2;
 971                         file->flags |= FLAG_TOP_DIR | FLAG_CONTENT_DIR;
 972                 } else if (in_del_hier) {
 973                         if (!relative_paths || !del_hier_name_len
 974                          || (l1 >= del_hier_name_len
 975                           && lastname[del_hier_name_len] == '/'))
 976                                 file->flags |= FLAG_CONTENT_DIR;
 977                         else
 978                                 in_del_hier = 0;
 979                 }
 980         }
 981
 982         if ((preserve_devices && IS_DEVICE(mode))
 983          || (preserve_specials && IS_SPECIAL(mode))) {
 984                 uint32 *devp = F_RDEV_P(file);
 985                 DEV_MAJOR(devp) = major(rdev);
 986                 DEV_MINOR(devp) = minor(rdev);
 987         }
 988
 989 #ifdef SUPPORT_LINKS
 990         if (linkname_len) {
 991                 bp += basename_len;
 992                 if (first_hlink_ndx >= flist->ndx_start) {
 993                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 994                         memcpy(bp, F_SYMLINK(first), linkname_len);
 995                 } else {
 996                         if (munge_symlinks) {
 997                                 strlcpy(bp, SYMLINK_PREFIX, linkname_len);
 998                                 bp += SYMLINK_PREFIX_LEN;
 999                                 linkname_len -= SYMLINK_PREFIX_LEN;
1000                         }
1001 #ifdef ICONV_OPTION
1002                         if (sender_symlink_iconv) {
1003                                 xbuf outbuf, inbuf;
1004
1005                                 alloc_len = linkname_len;
1006                                 linkname_len /= 2;
1007
1008                                 /* Read the symlink data into the end of our double-sized
1009                                  * buffer and then convert it into the right spot. */
1010                                 INIT_XBUF(inbuf, bp + alloc_len - linkname_len,
1011                                           linkname_len - 1, (size_t)-1);
1012                                 read_sbuf(f, inbuf.buf, inbuf.len);
1013                                 INIT_XBUF(outbuf, bp, 0, alloc_len);
1014
1015                                 if (iconvbufs(ic_recv, &inbuf, &outbuf, 0) < 0) {
1016                                         io_error |= IOERR_GENERAL;
1017                                         rprintf(FERROR_XFER,
1018                                             "[%s] cannot convert symlink data for: %s (%s)\n",
1019                                             who_am_i(), full_fname(thisname), strerror(errno));
1020                                         bp = (char*)file->basename;
1021                                         *bp++ = '\0';
1022                                         outbuf.len = 0;
1023                                 }
1024                                 bp[outbuf.len] = '\0';
1025                         } else
1026 #endif
1027                                 read_sbuf(f, bp, linkname_len - 1);
1028                         if (sanitize_paths && !munge_symlinks && *bp)
1029                                 sanitize_path(bp, bp, "", lastdir_depth, SP_DEFAULT);
1030                 }
1031         }
1032 #endif
1033
1034 #ifdef SUPPORT_HARD_LINKS
1035         if (preserve_hard_links && xflags & XMIT_HLINKED) {
1036                 if (protocol_version >= 30) {
1037                         if (xflags & XMIT_HLINK_FIRST) {
1038                                 F_HL_GNUM(file) = flist->ndx_start + flist->used;
1039                         } else
1040                                 F_HL_GNUM(file) = first_hlink_ndx;
1041                 } else {
1042                         static int32 cnt = 0;
1043                         struct ht_int64_node *np;
1044                         int64 ino;
1045                         int32 ndx;
1046                         if (protocol_version < 26) {
1047                                 dev = read_int(f);
1048                                 ino = read_int(f);
1049                         } else {
1050                                 if (!(xflags & XMIT_SAME_DEV_pre30))
1051                                         dev = read_longint(f);
1052                                 ino = read_longint(f);
1053                         }
1054                         np = idev_find(dev, ino);
1055                         ndx = (int32)(long)np->data - 1;
1056                         if (ndx < 0) {
1057                                 ndx = cnt++;
1058                                 np->data = (void*)(long)cnt;
1059                         }
1060                         F_HL_GNUM(file) = ndx;
1061                 }
1062         }
1063 #endif
1064
1065         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
1066                 if (S_ISREG(mode))
1067                         bp = F_SUM(file);
1068                 else {
1069                         /* Prior to 28, we get a useless set of nulls. */
1070                         bp = tmp_sum;
1071                 }
1072                 if (first_hlink_ndx >= flist->ndx_start) {
1073                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
1074                         memcpy(bp, F_SUM(first), checksum_len);
1075                 } else
1076                         read_buf(f, bp, checksum_len);
1077         }
1078
1079 #ifdef SUPPORT_ACLS
1080         if (preserve_acls && !S_ISLNK(mode))
1081                 receive_acl(file, f);
1082 #endif
1083 #ifdef SUPPORT_XATTRS
1084         if (preserve_xattrs)
1085                 receive_xattr(file, f );
1086 #endif
1087
1088         if (S_ISREG(mode) || S_ISLNK(mode))
1089                 stats.total_size += file_length;
1090
1091         return file;
1092 }
1093
1094 /* Create a file_struct for a named file by reading its stat() information
1095  * and performing extensive checks against global options.
1096  *
1097  * Returns a pointer to the new file struct, or NULL if there was an error
1098  * or this file should be excluded.
1099  *
1100  * Note: Any error (here or in send_file_name) that results in the omission of
1101  * an existent source file from the file list should set
1102  * "io_error |= IOERR_GENERAL" to avoid deletion of the file from the
1103  * destination if --delete is on. */
1104 struct file_struct *make_file(const char *fname, struct file_list *flist,
1105                               STRUCT_STAT *stp, int flags, int filter_level)
1106 {
1107         static char *lastdir;
1108         static int lastdir_len = -1;
1109         struct file_struct *file;
1110         char thisname[MAXPATHLEN];
1111         char linkname[MAXPATHLEN];
1112         int alloc_len, basename_len, linkname_len;
1113         int extra_len = file_extra_cnt * EXTRA_LEN;
1114         const char *basename;
1115         alloc_pool_t *pool;
1116         STRUCT_STAT st;
1117         char *bp;
1118
1119         if (strlcpy(thisname, fname, sizeof thisname) >= sizeof thisname) {
1120                 io_error |= IOERR_GENERAL;
1121                 rprintf(FERROR_XFER, "skipping overly long name: %s\n", fname);
1122                 return NULL;
1123         }
1124         clean_fname(thisname, 0);
1125         if (sanitize_paths)
1126                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
1127
1128         if (stp && (S_ISDIR(stp->st_mode) || stp->st_mode == 0)) {
1129                 /* This is needed to handle a "symlink/." with a --relative
1130                  * dir, or a request to delete a specific file. */
1131                 st = *stp;
1132                 *linkname = '\0'; /* make IBM code checker happy */
1133         } else if (readlink_stat(thisname, &st, linkname) != 0) {
1134                 int save_errno = errno;
1135                 /* See if file is excluded before reporting an error. */
1136                 if (filter_level != NO_FILTERS
1137                  && (is_excluded(thisname, 0, filter_level)
1138                   || is_excluded(thisname, 1, filter_level))) {
1139                         if (ignore_perishable && save_errno != ENOENT)
1140                                 non_perishable_cnt++;
1141                         return NULL;
1142                 }
1143                 if (save_errno == ENOENT) {
1144 #ifdef SUPPORT_LINKS
1145                         /* When our options tell us to follow a symlink that
1146                          * points nowhere, tell the user about the symlink
1147                          * instead of giving a "vanished" message.  We only
1148                          * dereference a symlink if one of the --copy*links
1149                          * options was specified, so there's no need for the
1150                          * extra lstat() if one of these options isn't on. */
1151                         if ((copy_links || copy_unsafe_links || copy_dirlinks)
1152                          && x_lstat(thisname, &st, NULL) == 0
1153                          && S_ISLNK(st.st_mode)) {
1154                                 io_error |= IOERR_GENERAL;
1155                                 rprintf(FERROR_XFER, "symlink has no referent: %s\n",
1156                                         full_fname(thisname));
1157                         } else
1158 #endif
1159                         {
1160                                 enum logcode c = am_daemon && protocol_version < 28
1161                                                ? FERROR : FWARNING;
1162                                 io_error |= IOERR_VANISHED;
1163                                 rprintf(c, "file has vanished: %s\n",
1164                                         full_fname(thisname));
1165                         }
1166                 } else {
1167                         io_error |= IOERR_GENERAL;
1168                         rsyserr(FERROR_XFER, save_errno, "readlink_stat(%s) failed",
1169                                 full_fname(thisname));
1170                 }
1171                 return NULL;
1172         } else if (st.st_mode == 0) {
1173                 io_error |= IOERR_GENERAL;
1174                 rprintf(FINFO, "skipping file with bogus (zero) st_mode: %s\n",
1175                         full_fname(thisname));
1176                 return NULL;
1177         }
1178
1179         if (filter_level == NO_FILTERS)
1180                 goto skip_filters;
1181
1182         if (S_ISDIR(st.st_mode)) {
1183                 if (!xfer_dirs) {
1184                         rprintf(FINFO, "skipping directory %s\n", thisname);
1185                         return NULL;
1186                 }
1187                 /* -x only affects dirs because we need to avoid recursing
1188                  * into a mount-point directory, not to avoid copying a
1189                  * symlinked file if -L (or similar) was specified. */
1190                 if (one_file_system && st.st_dev != filesystem_dev
1191                  && BITS_SETnUNSET(flags, FLAG_CONTENT_DIR, FLAG_TOP_DIR)) {
1192                         if (one_file_system > 1) {
1193                                 if (INFO_GTE(MOUNT, 1)) {
1194                                         rprintf(FINFO,
1195                                             "[%s] skipping mount-point dir %s\n",
1196                                             who_am_i(), thisname);
1197                                 }
1198                                 return NULL;
1199                         }
1200                         flags |= FLAG_MOUNT_DIR;
1201                         flags &= ~FLAG_CONTENT_DIR;
1202                 }
1203         } else
1204                 flags &= ~FLAG_CONTENT_DIR;
1205
1206         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level)) {
1207                 if (ignore_perishable)
1208                         non_perishable_cnt++;
1209                 return NULL;
1210         }
1211
1212         if (lp_ignore_nonreadable(module_id)) {
1213 #ifdef SUPPORT_LINKS
1214                 if (!S_ISLNK(st.st_mode))
1215 #endif
1216                         if (access(thisname, R_OK) != 0)
1217                                 return NULL;
1218         }
1219
1220   skip_filters:
1221
1222         /* Only divert a directory in the main transfer. */
1223         if (flist) {
1224                 if (flist->prev && S_ISDIR(st.st_mode)
1225                  && flags & FLAG_DIVERT_DIRS) {
1226                         /* Room for parent/sibling/next-child info. */
1227                         extra_len += DIRNODE_EXTRA_CNT * EXTRA_LEN;
1228                         if (relative_paths)
1229                                 extra_len += PTR_EXTRA_CNT * EXTRA_LEN;
1230                         pool = dir_flist->file_pool;
1231                 } else
1232                         pool = flist->file_pool;
1233         } else {
1234 #ifdef SUPPORT_ACLS
1235                 /* Directories need an extra int32 for the default ACL. */
1236                 if (preserve_acls && S_ISDIR(st.st_mode))
1237                         extra_len += EXTRA_LEN;
1238 #endif
1239                 pool = NULL;
1240         }
1241
1242         if (DEBUG_GTE(FLIST, 2)) {
1243                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
1244                         who_am_i(), thisname, filter_level);
1245         }
1246
1247         if ((basename = strrchr(thisname, '/')) != NULL) {
1248                 int len = basename++ - thisname;
1249                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
1250                         lastdir = new_array(char, len + 1);
1251                         memcpy(lastdir, thisname, len);
1252                         lastdir[len] = '\0';
1253                         lastdir_len = len;
1254                 }
1255         } else
1256                 basename = thisname;
1257         basename_len = strlen(basename) + 1; /* count the '\0' */
1258
1259 #ifdef SUPPORT_LINKS
1260         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
1261 #else
1262         linkname_len = 0;
1263 #endif
1264
1265 #if SIZEOF_CAPITAL_OFF_T >= 8
1266         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
1267                 extra_len += EXTRA_LEN;
1268 #endif
1269
1270         if (always_checksum && am_sender && S_ISREG(st.st_mode)) {
1271                 file_checksum(thisname, tmp_sum, st.st_size);
1272                 if (sender_keeps_checksum)
1273                         extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
1274         }
1275
1276 #if EXTRA_ROUNDING > 0
1277         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
1278                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
1279 #endif
1280
1281         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
1282                   + linkname_len;
1283         if (pool)
1284                 bp = pool_alloc(pool, alloc_len, "make_file");
1285         else {
1286                 if (!(bp = new_array(char, alloc_len)))
1287                         out_of_memory("make_file");
1288         }
1289
1290         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
1291         bp += extra_len;
1292         file = (struct file_struct *)bp;
1293         bp += FILE_STRUCT_LEN;
1294
1295         memcpy(bp, basename, basename_len);
1296
1297 #ifdef SUPPORT_HARD_LINKS
1298         if (preserve_hard_links && flist && flist->prev) {
1299                 if (protocol_version >= 28
1300                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
1301                  : S_ISREG(st.st_mode)) {
1302                         tmp_dev = (int64)st.st_dev + 1;
1303                         tmp_ino = (int64)st.st_ino;
1304                 } else
1305                         tmp_dev = 0;
1306         }
1307 #endif
1308
1309 #ifdef HAVE_STRUCT_STAT_ST_RDEV
1310         if (IS_DEVICE(st.st_mode) || IS_SPECIAL(st.st_mode)) {
1311                 tmp_rdev = st.st_rdev;
1312                 st.st_size = 0;
1313         }
1314 #endif
1315
1316         file->flags = flags;
1317         file->modtime = st.st_mtime;
1318         file->len32 = (uint32)st.st_size;
1319 #if SIZEOF_CAPITAL_OFF_T >= 8
1320         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
1321                 file->flags |= FLAG_LENGTH64;
1322                 OPT_EXTRA(file, 0)->unum = (uint32)(st.st_size >> 32);
1323         }
1324 #endif
1325         file->mode = st.st_mode;
1326         if (uid_ndx) /* Check uid_ndx instead of preserve_uid for del support */
1327                 F_OWNER(file) = st.st_uid;
1328         if (gid_ndx) /* Check gid_ndx instead of preserve_gid for del support */
1329                 F_GROUP(file) = st.st_gid;
1330
1331         if (basename != thisname)
1332                 file->dirname = lastdir;
1333
1334 #ifdef SUPPORT_LINKS
1335         if (linkname_len)
1336                 memcpy(bp + basename_len, linkname, linkname_len);
1337 #endif
1338
1339         if (am_sender)
1340                 F_PATHNAME(file) = pathname;
1341         else if (!pool)
1342                 F_DEPTH(file) = extra_len / EXTRA_LEN;
1343
1344         if (basename_len == 0+1) {
1345                 if (!pool)
1346                         unmake_file(file);
1347                 return NULL;
1348         }
1349
1350         if (sender_keeps_checksum && S_ISREG(st.st_mode))
1351                 memcpy(F_SUM(file), tmp_sum, checksum_len);
1352
1353         if (unsort_ndx)
1354                 F_NDX(file) = stats.num_dirs;
1355
1356         return file;
1357 }
1358
1359 /* Only called for temporary file_struct entries created by make_file(). */
1360 void unmake_file(struct file_struct *file)
1361 {
1362         free(REQ_EXTRA(file, F_DEPTH(file)));
1363 }
1364
1365 static struct file_struct *send_file_name(int f, struct file_list *flist,
1366                                           const char *fname, STRUCT_STAT *stp,
1367                                           int flags, int filter_level)
1368 {
1369         struct file_struct *file;
1370
1371         file = make_file(fname, flist, stp, flags, filter_level);
1372         if (!file)
1373                 return NULL;
1374
1375         if (chmod_modes && !S_ISLNK(file->mode) && file->mode)
1376                 file->mode = tweak_mode(file->mode, chmod_modes);
1377
1378         if (f >= 0) {
1379                 char fbuf[MAXPATHLEN];
1380 #ifdef SUPPORT_LINKS
1381                 const char *symlink_name;
1382                 int symlink_len;
1383 #ifdef ICONV_OPTION
1384                 char symlink_buf[MAXPATHLEN];
1385 #endif
1386 #endif
1387 #if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
1388                 stat_x sx;
1389                 init_stat_x(&sx);
1390 #endif
1391
1392 #ifdef SUPPORT_LINKS
1393                 if (preserve_links && S_ISLNK(file->mode)) {
1394                         symlink_name = F_SYMLINK(file);
1395                         symlink_len = strlen(symlink_name);
1396                         if (symlink_len == 0) {
1397                                 io_error |= IOERR_GENERAL;
1398                                 f_name(file, fbuf);
1399                                 rprintf(FERROR_XFER,
1400                                     "skipping symlink with 0-length value: %s\n",
1401                                     full_fname(fbuf));
1402                                 return NULL;
1403                         }
1404                 } else {
1405                         symlink_name = NULL;
1406                         symlink_len = 0;
1407                 }
1408 #endif
1409
1410 #ifdef ICONV_OPTION
1411                 if (ic_send != (iconv_t)-1) {
1412                         xbuf outbuf, inbuf;
1413
1414                         INIT_CONST_XBUF(outbuf, fbuf);
1415
1416                         if (file->dirname) {
1417                                 INIT_XBUF_STRLEN(inbuf, (char*)file->dirname);
1418                                 outbuf.size -= 2; /* Reserve room for '/' & 1 more char. */
1419                                 if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0)
1420                                         goto convert_error;
1421                                 outbuf.size += 2;
1422                                 fbuf[outbuf.len++] = '/';
1423                         }
1424
1425                         INIT_XBUF_STRLEN(inbuf, (char*)file->basename);
1426                         if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0) {
1427                           convert_error:
1428                                 io_error |= IOERR_GENERAL;
1429                                 rprintf(FERROR_XFER,
1430                                     "[%s] cannot convert filename: %s (%s)\n",
1431                                     who_am_i(), f_name(file, fbuf), strerror(errno));
1432                                 return NULL;
1433                         }
1434                         fbuf[outbuf.len] = '\0';
1435
1436 #ifdef SUPPORT_LINKS
1437                         if (symlink_len && sender_symlink_iconv) {
1438                                 INIT_XBUF(inbuf, (char*)symlink_name, symlink_len, (size_t)-1);
1439                                 INIT_CONST_XBUF(outbuf, symlink_buf);
1440                                 if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0) {
1441                                         io_error |= IOERR_GENERAL;
1442                                         f_name(file, fbuf);
1443                                         rprintf(FERROR_XFER,
1444                                             "[%s] cannot convert symlink data for: %s (%s)\n",
1445                                             who_am_i(), full_fname(fbuf), strerror(errno));
1446                                         return NULL;
1447                                 }
1448                                 symlink_buf[outbuf.len] = '\0';
1449
1450                                 symlink_name = symlink_buf;
1451                                 symlink_len = outbuf.len;
1452                         }
1453 #endif
1454                 } else
1455 #endif
1456                         f_name(file, fbuf);
1457
1458 #ifdef SUPPORT_ACLS
1459                 if (preserve_acls && !S_ISLNK(file->mode)) {
1460                         sx.st.st_mode = file->mode;
1461                         if (get_acl(fname, &sx) < 0) {
1462                                 io_error |= IOERR_GENERAL;
1463                                 return NULL;
1464                         }
1465                 }
1466 #endif
1467 #ifdef SUPPORT_XATTRS
1468                 if (preserve_xattrs) {
1469                         if (get_xattr(fname, &sx) < 0) {
1470                                 io_error |= IOERR_GENERAL;
1471                                 return NULL;
1472                         }
1473                 }
1474 #endif
1475
1476                 send_file_entry(f, fbuf, file,
1477 #ifdef SUPPORT_LINKS
1478                                 symlink_name, symlink_len,
1479 #endif
1480                                 flist->used, flist->ndx_start);
1481
1482 #ifdef SUPPORT_ACLS
1483                 if (preserve_acls && !S_ISLNK(file->mode)) {
1484                         send_acl(&sx, f);
1485                         free_acl(&sx);
1486                 }
1487 #endif
1488 #ifdef SUPPORT_XATTRS
1489                 if (preserve_xattrs) {
1490                         F_XATTR(file) = send_xattr(&sx, f);
1491                         free_xattr(&sx);
1492                 }
1493 #endif
1494         }
1495
1496         maybe_emit_filelist_progress(flist->used + flist_count_offset);
1497
1498         flist_expand(flist, 1);
1499         flist->files[flist->used++] = file;
1500
1501         return file;
1502 }
1503
1504 static void send_if_directory(int f, struct file_list *flist,
1505                               struct file_struct *file,
1506                               char *fbuf, unsigned int ol,
1507                               int flags)
1508 {
1509         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1510
1511         if (S_ISDIR(file->mode)
1512             && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) {
1513                 void *save_filters;
1514                 unsigned int len = strlen(fbuf);
1515                 if (len > 1 && fbuf[len-1] == '/')
1516                         fbuf[--len] = '\0';
1517                 if (len >= MAXPATHLEN - 1) {
1518                         io_error |= IOERR_GENERAL;
1519                         rprintf(FERROR_XFER, "skipping long-named directory: %s\n",
1520                                 full_fname(fbuf));
1521                         return;
1522                 }
1523                 save_filters = push_local_filters(fbuf, len);
1524                 send_directory(f, flist, fbuf, len, flags);
1525                 pop_local_filters(save_filters);
1526                 fbuf[ol] = '\0';
1527                 if (is_dot_dir)
1528                         fbuf[ol-1] = '.';
1529         }
1530 }
1531
1532 static int file_compare(const void *file1, const void *file2)
1533 {
1534         return f_name_cmp(*(struct file_struct **)file1,
1535                           *(struct file_struct **)file2);
1536 }
1537
1538 /* The guts of a merge-sort algorithm.  This was derived from the glibc
1539  * version, but I (Wayne) changed the merge code to do less copying and
1540  * to require only half the amount of temporary memory. */
1541 static void fsort_tmp(struct file_struct **fp, size_t num,
1542                       struct file_struct **tmp)
1543 {
1544         struct file_struct **f1, **f2, **t;
1545         size_t n1, n2;
1546
1547         n1 = num / 2;
1548         n2 = num - n1;
1549         f1 = fp;
1550         f2 = fp + n1;
1551
1552         if (n1 > 1)
1553                 fsort_tmp(f1, n1, tmp);
1554         if (n2 > 1)
1555                 fsort_tmp(f2, n2, tmp);
1556
1557         while (f_name_cmp(*f1, *f2) <= 0) {
1558                 if (!--n1)
1559                         return;
1560                 f1++;
1561         }
1562
1563         t = tmp;
1564         memcpy(t, f1, n1 * PTR_SIZE);
1565
1566         *f1++ = *f2++, n2--;
1567
1568         while (n1 > 0 && n2 > 0) {
1569                 if (f_name_cmp(*t, *f2) <= 0)
1570                         *f1++ = *t++, n1--;
1571                 else
1572                         *f1++ = *f2++, n2--;
1573         }
1574
1575         if (n1 > 0)
1576                 memcpy(f1, t, n1 * PTR_SIZE);
1577 }
1578
1579 /* This file-struct sorting routine makes sure that any identical names in
1580  * the file list stay in the same order as they were in the original list.
1581  * This is particularly vital in inc_recurse mode where we expect a sort
1582  * on the flist to match the exact order of a sort on the dir_flist. */
1583 static void fsort(struct file_struct **fp, size_t num)
1584 {
1585         if (num <= 1)
1586                 return;
1587
1588         if (use_qsort)
1589                 qsort(fp, num, PTR_SIZE, file_compare);
1590         else {
1591                 struct file_struct **tmp = new_array(struct file_struct *,
1592                                                      (num+1) / 2);
1593                 fsort_tmp(fp, num, tmp);
1594                 free(tmp);
1595         }
1596 }
1597
1598 /* We take an entire set of sibling dirs from the sorted flist and link them
1599  * into the tree, setting the appropriate parent/child/sibling pointers. */
1600 static void add_dirs_to_tree(int parent_ndx, struct file_list *from_flist,
1601                              int dir_cnt)
1602 {
1603         int i;
1604         int32 *dp = NULL;
1605         int32 *parent_dp = parent_ndx < 0 ? NULL
1606                          : F_DIR_NODE_P(dir_flist->sorted[parent_ndx]);
1607
1608         flist_expand(dir_flist, dir_cnt);
1609         dir_flist->sorted = dir_flist->files;
1610
1611         for (i = 0; dir_cnt; i++) {
1612                 struct file_struct *file = from_flist->sorted[i];
1613
1614                 if (!S_ISDIR(file->mode))
1615                         continue;
1616
1617                 dir_flist->files[dir_flist->used++] = file;
1618                 dir_cnt--;
1619
1620                 if (file->basename[0] == '.' && file->basename[1] == '\0')
1621                         continue;
1622
1623                 if (dp)
1624                         DIR_NEXT_SIBLING(dp) = dir_flist->used - 1;
1625                 else if (parent_dp)
1626                         DIR_FIRST_CHILD(parent_dp) = dir_flist->used - 1;
1627                 else
1628                         send_dir_ndx = dir_flist->used - 1;
1629
1630                 dp = F_DIR_NODE_P(file);
1631                 DIR_PARENT(dp) = parent_ndx;
1632                 DIR_FIRST_CHILD(dp) = -1;
1633         }
1634         if (dp)
1635                 DIR_NEXT_SIBLING(dp) = -1;
1636 }
1637
1638 static void interpret_stat_error(const char *fname, int is_dir)
1639 {
1640         if (errno == ENOENT) {
1641                 io_error |= IOERR_VANISHED;
1642                 rprintf(FWARNING, "%s has vanished: %s\n",
1643                         is_dir ? "directory" : "file", full_fname(fname));
1644         } else {
1645                 io_error |= IOERR_GENERAL;
1646                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1647                         full_fname(fname));
1648         }
1649 }
1650
1651 /* This function is normally called by the sender, but the receiving side also
1652  * calls it from get_dirlist() with f set to -1 so that we just construct the
1653  * file list in memory without sending it over the wire.  Also, get_dirlist()
1654  * might call this with f set to -2, which also indicates that local filter
1655  * rules should be ignored. */
1656 static void send_directory(int f, struct file_list *flist, char *fbuf, int len,
1657                            int flags)
1658 {
1659         struct dirent *di;
1660         unsigned remainder;
1661         char *p;
1662         DIR *d;
1663         int divert_dirs = (flags & FLAG_DIVERT_DIRS) != 0;
1664         int start = flist->used;
1665         int filter_level = f == -2 ? SERVER_FILTERS : ALL_FILTERS;
1666
1667         assert(flist != NULL);
1668
1669         if (!(d = opendir(fbuf))) {
1670                 if (errno == ENOENT) {
1671                         if (am_sender) /* Can abuse this for vanished error w/ENOENT: */
1672                                 interpret_stat_error(fbuf, True);
1673                         return;
1674                 }
1675                 io_error |= IOERR_GENERAL;
1676                 rsyserr(FERROR_XFER, errno, "opendir %s failed", full_fname(fbuf));
1677                 return;
1678         }
1679
1680         p = fbuf + len;
1681         if (len != 1 || *fbuf != '/')
1682                 *p++ = '/';
1683         *p = '\0';
1684         remainder = MAXPATHLEN - (p - fbuf);
1685
1686         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1687                 char *dname = d_name(di);
1688                 if (dname[0] == '.' && (dname[1] == '\0'
1689                     || (dname[1] == '.' && dname[2] == '\0')))
1690                         continue;
1691                 if (strlcpy(p, dname, remainder) >= remainder) {
1692                         io_error |= IOERR_GENERAL;
1693                         rprintf(FERROR_XFER,
1694                                 "cannot send long-named file %s\n",
1695                                 full_fname(fbuf));
1696                         continue;
1697                 }
1698                 if (dname[0] == '\0') {
1699                         io_error |= IOERR_GENERAL;
1700                         rprintf(FERROR_XFER,
1701                                 "cannot send file with empty name in %s\n",
1702                                 full_fname(fbuf));
1703                         continue;
1704                 }
1705
1706                 send_file_name(f, flist, fbuf, NULL, flags, filter_level);
1707         }
1708
1709         fbuf[len] = '\0';
1710
1711         if (errno) {
1712                 io_error |= IOERR_GENERAL;
1713                 rsyserr(FERROR_XFER, errno, "readdir(%s)", full_fname(fbuf));
1714         }
1715
1716         closedir(d);
1717
1718         if (f >= 0 && recurse && !divert_dirs) {
1719                 int i, end = flist->used - 1;
1720                 /* send_if_directory() bumps flist->used, so use "end". */
1721                 for (i = start; i <= end; i++)
1722                         send_if_directory(f, flist, flist->files[i], fbuf, len, flags);
1723         }
1724 }
1725
1726 static void send_implied_dirs(int f, struct file_list *flist, char *fname,
1727                               char *start, char *limit, int flags, char name_type)
1728 {
1729         static char lastpath[MAXPATHLEN] = "";
1730         static int lastpath_len = 0;
1731         static struct file_struct *lastpath_struct = NULL;
1732         struct file_struct *file;
1733         item_list *relname_list;
1734         relnamecache **rnpp;
1735         int len, need_new_dir, depth = 0;
1736         struct filter_list_struct save_filter_list = filter_list;
1737
1738         flags = (flags | FLAG_IMPLIED_DIR) & ~(FLAG_TOP_DIR | FLAG_CONTENT_DIR);
1739         filter_list.head = filter_list.tail = NULL; /* Don't filter implied dirs. */
1740
1741         if (inc_recurse) {
1742                 if (lastpath_struct && F_PATHNAME(lastpath_struct) == pathname
1743                  && lastpath_len == limit - fname
1744                  && strncmp(lastpath, fname, lastpath_len) == 0)
1745                         need_new_dir = 0;
1746                 else
1747                         need_new_dir = 1;
1748         } else {
1749                 char *tp = fname, *lp = lastpath;
1750                 /* Skip any initial directories in our path that we
1751                  * have in common with lastpath. */
1752                 assert(start == fname);
1753                 for ( ; ; tp++, lp++) {
1754                         if (tp == limit) {
1755                                 if (*lp == '/' || *lp == '\0')
1756                                         goto done;
1757                                 break;
1758                         }
1759                         if (*lp != *tp)
1760                                 break;
1761                         if (*tp == '/') {
1762                                 start = tp;
1763                                 depth++;
1764                         }
1765                 }
1766                 need_new_dir = 1;
1767         }
1768
1769         if (need_new_dir) {
1770                 int save_copy_links = copy_links;
1771                 int save_xfer_dirs = xfer_dirs;
1772                 char *slash;
1773
1774                 copy_links = xfer_dirs = 1;
1775
1776                 *limit = '\0';
1777
1778                 for (slash = start; (slash = strchr(slash+1, '/')) != NULL; ) {
1779                         *slash = '\0';
1780                         file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1781                         depth++;
1782                         if (!inc_recurse && file && S_ISDIR(file->mode))
1783                                 change_local_filter_dir(fname, strlen(fname), depth);
1784                         *slash = '/';
1785                 }
1786
1787                 file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1788                 if (inc_recurse) {
1789                         if (file && !S_ISDIR(file->mode))
1790                                 file = NULL;
1791                         lastpath_struct = file;
1792                 } else if (file && S_ISDIR(file->mode))
1793                         change_local_filter_dir(fname, strlen(fname), ++depth);
1794
1795                 strlcpy(lastpath, fname, sizeof lastpath);
1796                 lastpath_len = limit - fname;
1797
1798                 *limit = '/';
1799
1800                 copy_links = save_copy_links;
1801                 xfer_dirs = save_xfer_dirs;
1802
1803                 if (!inc_recurse)
1804                         goto done;
1805         }
1806
1807         if (!lastpath_struct)
1808                 goto done; /* dir must have vanished */
1809
1810         len = strlen(limit+1);
1811         memcpy(&relname_list, F_DIR_RELNAMES_P(lastpath_struct), sizeof relname_list);
1812         if (!relname_list) {
1813                 if (!(relname_list = new0(item_list)))
1814                         out_of_memory("send_implied_dirs");
1815                 memcpy(F_DIR_RELNAMES_P(lastpath_struct), &relname_list, sizeof relname_list);
1816         }
1817         rnpp = EXPAND_ITEM_LIST(relname_list, relnamecache *, 32);
1818         if (!(*rnpp = (relnamecache*)new_array(char, sizeof (relnamecache) + len)))
1819                 out_of_memory("send_implied_dirs");
1820         (*rnpp)->name_type = name_type;
1821         strlcpy((*rnpp)->fname, limit+1, len + 1);
1822
1823 done:
1824         filter_list = save_filter_list;
1825 }
1826
1827 static void send1extra(int f, struct file_struct *file, struct file_list *flist)
1828 {
1829         char fbuf[MAXPATHLEN];
1830         item_list *relname_list;
1831         int len, dlen, flags = FLAG_DIVERT_DIRS | FLAG_CONTENT_DIR;
1832         size_t j;
1833
1834         f_name(file, fbuf);
1835         dlen = strlen(fbuf);
1836
1837         if (!change_pathname(file, NULL, 0))
1838                 exit_cleanup(RERR_FILESELECT);
1839
1840         change_local_filter_dir(fbuf, dlen, send_dir_depth);
1841
1842         if (file->flags & FLAG_CONTENT_DIR) {
1843                 if (one_file_system) {
1844                         STRUCT_STAT st;
1845                         if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1846                                 interpret_stat_error(fbuf, True);
1847                                 return;
1848                         }
1849                         filesystem_dev = st.st_dev;
1850                 }
1851                 send_directory(f, flist, fbuf, dlen, flags);
1852         }
1853
1854         if (!relative_paths)
1855                 return;
1856
1857         memcpy(&relname_list, F_DIR_RELNAMES_P(file), sizeof relname_list);
1858         if (!relname_list)
1859                 return;
1860
1861         for (j = 0; j < relname_list->count; j++) {
1862                 char *slash;
1863                 relnamecache *rnp = ((relnamecache**)relname_list->items)[j];
1864                 char name_type = rnp->name_type;
1865
1866                 fbuf[dlen] = '/';
1867                 len = strlcpy(fbuf + dlen + 1, rnp->fname, sizeof fbuf - dlen - 1);
1868                 free(rnp);
1869                 if (len >= (int)sizeof fbuf)
1870                         continue; /* Impossible... */
1871
1872                 slash = strchr(fbuf+dlen+1, '/');
1873                 if (slash) {
1874                         send_implied_dirs(f, flist, fbuf, fbuf+dlen+1, slash, flags, name_type);
1875                         continue;
1876                 }
1877
1878                 if (name_type != NORMAL_NAME) {
1879                         STRUCT_STAT st;
1880                         if (link_stat(fbuf, &st, 1) != 0) {
1881                                 interpret_stat_error(fbuf, True);
1882                                 continue;
1883                         }
1884                         send_file_name(f, flist, fbuf, &st, FLAG_TOP_DIR | flags, ALL_FILTERS);
1885                 } else
1886                         send_file_name(f, flist, fbuf, NULL, FLAG_TOP_DIR | flags, ALL_FILTERS);
1887         }
1888
1889         free(relname_list);
1890 }
1891
1892 void send_extra_file_list(int f, int at_least)
1893 {
1894         struct file_list *flist;
1895         int64 start_write;
1896         uint16 prev_flags;
1897         int old_cnt, save_io_error = io_error;
1898
1899         if (flist_eof)
1900                 return;
1901
1902         /* Keep sending data until we have the requested number of
1903          * files in the upcoming file-lists. */
1904         old_cnt = cur_flist->used;
1905         for (flist = first_flist; flist != cur_flist; flist = flist->next)
1906                 old_cnt += flist->used;
1907         while (file_total - old_cnt < at_least) {
1908                 struct file_struct *file = dir_flist->sorted[send_dir_ndx];
1909                 int dir_ndx, dstart = stats.num_dirs;
1910                 const char *pathname = F_PATHNAME(file);
1911                 int32 *dp;
1912
1913                 flist = flist_new(0, "send_extra_file_list");
1914                 start_write = stats.total_written;
1915
1916                 if (unsort_ndx)
1917                         dir_ndx = F_NDX(file);
1918                 else
1919                         dir_ndx = send_dir_ndx;
1920                 write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
1921                 flist->parent_ndx = dir_ndx;
1922
1923                 send1extra(f, file, flist);
1924                 prev_flags = file->flags;
1925                 dp = F_DIR_NODE_P(file);
1926
1927                 /* If there are any duplicate directory names that follow, we
1928                  * send all the dirs together in one file-list.  The dir_flist
1929                  * tree links all the child subdirs onto the last dup dir. */
1930                 while ((dir_ndx = DIR_NEXT_SIBLING(dp)) >= 0
1931                     && dir_flist->sorted[dir_ndx]->flags & FLAG_DUPLICATE) {
1932                         send_dir_ndx = dir_ndx;
1933                         file = dir_flist->sorted[dir_ndx];
1934                         /* Try to avoid some duplicate scanning of identical dirs. */
1935                         if (F_PATHNAME(file) == pathname && prev_flags & FLAG_CONTENT_DIR)
1936                                 file->flags &= ~FLAG_CONTENT_DIR;
1937                         send1extra(f, file, flist);
1938                         prev_flags = file->flags;
1939                         dp = F_DIR_NODE_P(file);
1940                 }
1941
1942                 if (protocol_version < 31 || io_error == save_io_error || ignore_errors)
1943                         write_byte(f, 0);
1944                 else {
1945                         write_shortint(f, XMIT_EXTENDED_FLAGS|XMIT_IO_ERROR_ENDLIST);
1946                         write_varint(f, io_error);
1947                 }
1948
1949                 if (need_unsorted_flist) {
1950                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
1951                                 out_of_memory("send_extra_file_list");
1952                         memcpy(flist->sorted, flist->files,
1953                                flist->used * sizeof (struct file_struct*));
1954                 } else
1955                         flist->sorted = flist->files;
1956
1957                 flist_sort_and_clean(flist, 0);
1958
1959                 add_dirs_to_tree(send_dir_ndx, flist, stats.num_dirs - dstart);
1960                 flist_done_allocating(flist);
1961
1962                 file_total += flist->used;
1963                 stats.flist_size += stats.total_written - start_write;
1964                 stats.num_files += flist->used;
1965                 if (DEBUG_GTE(FLIST, 3))
1966                         output_flist(flist);
1967
1968                 if (DIR_FIRST_CHILD(dp) >= 0) {
1969                         send_dir_ndx = DIR_FIRST_CHILD(dp);
1970                         send_dir_depth++;
1971                 } else {
1972                         while (DIR_NEXT_SIBLING(dp) < 0) {
1973                                 if ((send_dir_ndx = DIR_PARENT(dp)) < 0) {
1974                                         write_ndx(f, NDX_FLIST_EOF);
1975                                         flist_eof = 1;
1976                                         change_local_filter_dir(NULL, 0, 0);
1977                                         goto finish;
1978                                 }
1979                                 send_dir_depth--;
1980                                 file = dir_flist->sorted[send_dir_ndx];
1981                                 dp = F_DIR_NODE_P(file);
1982                         }
1983                         send_dir_ndx = DIR_NEXT_SIBLING(dp);
1984                 }
1985         }
1986
1987   finish:
1988         if (io_error != save_io_error && protocol_version == 30 && !ignore_errors)
1989                 send_msg_int(MSG_IO_ERROR, io_error);
1990 }
1991
1992 struct file_list *send_file_list(int f, int argc, char *argv[])
1993 {
1994         static const char *lastdir;
1995         static int lastdir_len = -1;
1996         int len, dirlen;
1997         STRUCT_STAT st;
1998         char *p, *dir;
1999         struct file_list *flist;
2000         struct timeval start_tv, end_tv;
2001         int64 start_write;
2002         int use_ff_fd = 0;
2003         int disable_buffering;
2004         int flags = recurse ? FLAG_CONTENT_DIR : 0;
2005         int reading_remotely = filesfrom_host != NULL;
2006         int rl_flags = (reading_remotely ? 0 : RL_DUMP_COMMENTS)
2007 #ifdef ICONV_OPTION
2008                      | (filesfrom_convert ? RL_CONVERT : 0)
2009 #endif
2010                      | (eol_nulls || reading_remotely ? RL_EOL_NULLS : 0);
2011         int implied_dot_dir = 0;
2012
2013         rprintf(FLOG, "building file list\n");
2014         if (show_filelist_p())
2015                 start_filelist_progress("building file list");
2016         else if (inc_recurse && INFO_GTE(FLIST, 1) && !am_server)
2017                 rprintf(FCLIENT, "sending incremental file list\n");
2018
2019         start_write = stats.total_written;
2020         gettimeofday(&start_tv, NULL);
2021
2022         if (relative_paths && protocol_version >= 30)
2023                 implied_dirs = 1; /* We send flagged implied dirs */
2024
2025 #ifdef SUPPORT_HARD_LINKS
2026         if (preserve_hard_links && protocol_version >= 30 && !cur_flist)
2027                 init_hard_links();
2028 #endif
2029
2030         flist = cur_flist = flist_new(0, "send_file_list");
2031         if (inc_recurse) {
2032                 dir_flist = flist_new(FLIST_TEMP, "send_file_list");
2033                 flags |= FLAG_DIVERT_DIRS;
2034         } else
2035                 dir_flist = cur_flist;
2036
2037         disable_buffering = io_start_buffering_out(f);
2038         if (filesfrom_fd >= 0) {
2039                 if (argv[0] && !change_dir(argv[0], CD_NORMAL)) {
2040                         rsyserr(FERROR_XFER, errno, "change_dir %s failed",
2041                                 full_fname(argv[0]));
2042                         exit_cleanup(RERR_FILESELECT);
2043                 }
2044                 use_ff_fd = 1;
2045         }
2046
2047         if (!orig_dir)
2048                 orig_dir = strdup(curr_dir);
2049
2050         while (1) {
2051                 char fbuf[MAXPATHLEN], *fn, name_type;
2052
2053                 if (use_ff_fd) {
2054                         if (read_line(filesfrom_fd, fbuf, sizeof fbuf, rl_flags) == 0)
2055                                 break;
2056                         sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
2057                 } else {
2058                         if (argc-- == 0)
2059                                 break;
2060                         strlcpy(fbuf, *argv++, MAXPATHLEN);
2061                         if (sanitize_paths)
2062                                 sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
2063                 }
2064
2065                 len = strlen(fbuf);
2066                 if (relative_paths) {
2067                         /* We clean up fbuf below. */
2068                         name_type = NORMAL_NAME;
2069                 } else if (!len || fbuf[len - 1] == '/') {
2070                         if (len == 2 && fbuf[0] == '.') {
2071                                 /* Turn "./" into just "." rather than "./." */
2072                                 fbuf[--len] = '\0';
2073                         } else {
2074                                 if (len + 1 >= MAXPATHLEN)
2075                                         overflow_exit("send_file_list");
2076                                 fbuf[len++] = '.';
2077                                 fbuf[len] = '\0';
2078                         }
2079                         name_type = DOTDIR_NAME;
2080                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
2081                     && (len == 2 || fbuf[len-3] == '/')) {
2082                         if (len + 2 >= MAXPATHLEN)
2083                                 overflow_exit("send_file_list");
2084                         fbuf[len++] = '/';
2085                         fbuf[len++] = '.';
2086                         fbuf[len] = '\0';
2087                         name_type = DOTDIR_NAME;
2088                 } else if (fbuf[len-1] == '.' && (len == 1 || fbuf[len-2] == '/'))
2089                         name_type = DOTDIR_NAME;
2090                 else
2091                         name_type = NORMAL_NAME;
2092
2093                 dir = NULL;
2094
2095                 if (!relative_paths) {
2096                         p = strrchr(fbuf, '/');
2097                         if (p) {
2098                                 *p = '\0';
2099                                 if (p == fbuf)
2100                                         dir = "/";
2101                                 else
2102                                         dir = fbuf;
2103                                 len -= p - fbuf + 1;
2104                                 fn = p + 1;
2105                         } else
2106                                 fn = fbuf;
2107                 } else {
2108                         if ((p = strstr(fbuf, "/./")) != NULL) {
2109                                 *p = '\0';
2110                                 if (p == fbuf)
2111                                         dir = "/";
2112                                 else {
2113                                         dir = fbuf;
2114                                         clean_fname(dir, 0);
2115                                 }
2116                                 fn = p + 3;
2117                                 while (*fn == '/')
2118                                         fn++;
2119                                 if (!*fn)
2120                                         *--fn = '\0'; /* ensure room for '.' */
2121                         } else
2122                                 fn = fbuf;
2123                         /* A leading ./ can be used in relative mode to affect
2124                          * the dest dir without its name being in the path. */
2125                         if (*fn == '.' && fn[1] == '/' && !implied_dot_dir) {
2126                                 send_file_name(f, flist, ".", NULL,
2127                                     (flags | FLAG_IMPLIED_DIR) & ~FLAG_CONTENT_DIR,
2128                                     ALL_FILTERS);
2129                                 implied_dot_dir = 1;
2130                         }
2131                         len = clean_fname(fn, CFN_KEEP_TRAILING_SLASH
2132                                             | CFN_DROP_TRAILING_DOT_DIR);
2133                         if (len == 1) {
2134                                 if (fn[0] == '/') {
2135                                         fn = "/.";
2136                                         len = 2;
2137                                         name_type = DOTDIR_NAME;
2138                                 } else if (fn[0] == '.')
2139                                         name_type = DOTDIR_NAME;
2140                         } else if (fn[len-1] == '/') {
2141                                 fn[--len] = '\0';
2142                                 if (len == 1 && *fn == '.')
2143                                         name_type = DOTDIR_NAME;
2144                                 else
2145                                         name_type = SLASH_ENDING_NAME;
2146                         }
2147                         /* Reject a ".." dir in the active part of the path. */
2148                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
2149                                 if ((p[2] == '/' || p[2] == '\0')
2150                                  && (p == fn || p[-1] == '/')) {
2151                                         rprintf(FERROR,
2152                                             "found \"..\" dir in relative path: %s\n",
2153                                             fn);
2154                                         exit_cleanup(RERR_SYNTAX);
2155                                 }
2156                         }
2157                 }
2158
2159                 if (!*fn) {
2160                         len = 1;
2161                         fn = ".";
2162                         name_type = DOTDIR_NAME;
2163                 }
2164
2165                 dirlen = dir ? strlen(dir) : 0;
2166                 if (dirlen != lastdir_len || memcmp(lastdir, dir, dirlen) != 0) {
2167                         if (!change_pathname(NULL, dir, -dirlen))
2168                                 continue;
2169                         lastdir = pathname;
2170                         lastdir_len = pathname_len;
2171                 } else if (!change_pathname(NULL, lastdir, lastdir_len))
2172                         continue;
2173
2174                 if (fn != fbuf)
2175                         memmove(fbuf, fn, len + 1);
2176
2177                 if (link_stat(fbuf, &st, copy_dirlinks || name_type != NORMAL_NAME) != 0
2178                  || (name_type != DOTDIR_NAME && is_daemon_excluded(fbuf, S_ISDIR(st.st_mode)))
2179                  || (relative_paths && path_is_daemon_excluded(fbuf, 1))) {
2180                         if (errno != ENOENT || missing_args == 0) {
2181                                 /* This is a transfer error, but inhibit deletion
2182                                  * only if we might be omitting an existing file. */
2183                                 if (errno != ENOENT)
2184                                         io_error |= IOERR_GENERAL;
2185                                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
2186                                         full_fname(fbuf));
2187                                 continue;
2188                         } else if (missing_args == 1) {
2189                                 /* Just ignore the arg. */
2190                                 continue;
2191                         } else /* (missing_args == 2) */ {
2192                                 /* Send the arg as a "missing" entry with
2193                                  * mode 0, which tells the generator to delete it. */
2194                                 memset(&st, 0, sizeof st);
2195                         }
2196                 }
2197
2198                 /* A dot-dir should not be excluded! */
2199                 if (name_type != DOTDIR_NAME && st.st_mode != 0
2200                  && is_excluded(fbuf, S_ISDIR(st.st_mode) != 0, ALL_FILTERS))
2201                         continue;
2202
2203                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
2204                         rprintf(FINFO, "skipping directory %s\n", fbuf);
2205                         continue;
2206                 }
2207
2208                 if (inc_recurse && relative_paths && *fbuf) {
2209                         if ((p = strchr(fbuf+1, '/')) != NULL) {
2210                                 if (p - fbuf == 1 && *fbuf == '.') {
2211                                         if ((fn = strchr(p+1, '/')) != NULL)
2212                                                 p = fn;
2213                                 } else
2214                                         fn = p;
2215                                 send_implied_dirs(f, flist, fbuf, fbuf, p, flags, name_type);
2216                                 if (fn == p)
2217                                         continue;
2218                         }
2219                 } else if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
2220                         /* Send the implied directories at the start of the
2221                          * source spec, so we get their permissions right. */
2222                         send_implied_dirs(f, flist, fbuf, fbuf, p, flags, 0);
2223                 }
2224
2225                 if (one_file_system)
2226                         filesystem_dev = st.st_dev;
2227
2228                 if (recurse || (xfer_dirs && name_type != NORMAL_NAME)) {
2229                         struct file_struct *file;
2230                         file = send_file_name(f, flist, fbuf, &st,
2231                                               FLAG_TOP_DIR | FLAG_CONTENT_DIR | flags,
2232                                               NO_FILTERS);
2233                         if (!file)
2234                                 continue;
2235                         if (inc_recurse) {
2236                                 if (name_type == DOTDIR_NAME) {
2237                                         if (send_dir_depth < 0) {
2238                                                 send_dir_depth = 0;
2239                                                 change_local_filter_dir(fbuf, len, send_dir_depth);
2240                                         }
2241                                         send_directory(f, flist, fbuf, len, flags);
2242                                 }
2243                         } else
2244                                 send_if_directory(f, flist, file, fbuf, len, flags);
2245                 } else
2246                         send_file_name(f, flist, fbuf, &st, flags, NO_FILTERS);
2247         }
2248
2249         gettimeofday(&end_tv, NULL);
2250         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2251                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2252         if (stats.flist_buildtime == 0)
2253                 stats.flist_buildtime = 1;
2254         start_tv = end_tv;
2255
2256         /* Indicate end of file list */
2257         if (protocol_version < 31 || io_error == 0 || ignore_errors)
2258                 write_byte(f, 0);
2259         else {
2260                 write_shortint(f, XMIT_EXTENDED_FLAGS|XMIT_IO_ERROR_ENDLIST);
2261                 write_varint(f, io_error);
2262         }
2263
2264 #ifdef SUPPORT_HARD_LINKS
2265         if (preserve_hard_links && protocol_version >= 30 && !inc_recurse)
2266                 idev_destroy();
2267 #endif
2268
2269         if (show_filelist_p())
2270                 finish_filelist_progress(flist);
2271
2272         gettimeofday(&end_tv, NULL);
2273         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2274                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2275
2276         /* When converting names, both sides keep an unsorted file-list array
2277          * because the names will differ on the sending and receiving sides
2278          * (both sides will use the unsorted index number for each item). */
2279
2280         /* Sort the list without removing any duplicates.  This allows the
2281          * receiving side to ask for whatever name it kept.  For incremental
2282          * recursion mode, the sender marks duplicate dirs so that it can
2283          * send them together in a single file-list. */
2284         if (need_unsorted_flist) {
2285                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2286                         out_of_memory("send_file_list");
2287                 memcpy(flist->sorted, flist->files,
2288                        flist->used * sizeof (struct file_struct*));
2289         } else
2290                 flist->sorted = flist->files;
2291         flist_sort_and_clean(flist, 0);
2292         file_total += flist->used;
2293
2294         if (numeric_ids <= 0 && !inc_recurse)
2295                 send_id_list(f);
2296
2297         set_msg_fd_in(-1);
2298
2299         /* send the io_error flag */
2300         if (protocol_version < 30)
2301                 write_int(f, ignore_errors ? 0 : io_error);
2302         else if (io_error && protocol_version == 30 && !ignore_errors)
2303                 send_msg_int(MSG_IO_ERROR, io_error);
2304
2305         if (disable_buffering)
2306                 io_end_buffering_out();
2307
2308         stats.flist_size = stats.total_written - start_write;
2309         stats.num_files = flist->used;
2310
2311         if (DEBUG_GTE(FLIST, 3))
2312                 output_flist(flist);
2313
2314         if (DEBUG_GTE(FLIST, 2))
2315                 rprintf(FINFO, "send_file_list done\n");
2316
2317         if (inc_recurse) {
2318                 send_dir_depth = 1;
2319                 add_dirs_to_tree(-1, flist, stats.num_dirs);
2320                 if (!file_total || strcmp(flist->sorted[flist->low]->basename, ".") != 0)
2321                         flist->parent_ndx = -1;
2322                 flist_done_allocating(flist);
2323                 if (send_dir_ndx < 0) {
2324                         write_ndx(f, NDX_FLIST_EOF);
2325                         flist_eof = 1;
2326                 }
2327                 else if (file_total == 1) {
2328                         /* If we're creating incremental file-lists and there
2329                          * was just 1 item in the first file-list, send 1 more
2330                          * file-list to check if this is a 1-file xfer. */
2331                         send_extra_file_list(f, 1);
2332                 }
2333         } else
2334                 flist_eof = 1;
2335
2336         return flist;
2337 }
2338
2339 struct file_list *recv_file_list(int f)
2340 {
2341         struct file_list *flist;
2342         int dstart, flags;
2343         int64 start_read;
2344
2345         if (!first_flist) {
2346                 if (show_filelist_p())
2347                         start_filelist_progress("receiving file list");
2348                 else if (inc_recurse && INFO_GTE(FLIST, 1) && !am_server)
2349                         rprintf(FCLIENT, "receiving incremental file list\n");
2350                 rprintf(FLOG, "receiving file list\n");
2351                 if (usermap)
2352                         parse_name_map(usermap, True);
2353                 if (groupmap)
2354                         parse_name_map(groupmap, False);
2355         }
2356
2357         start_read = stats.total_read;
2358
2359 #ifdef SUPPORT_HARD_LINKS
2360         if (preserve_hard_links && !first_flist)
2361                 init_hard_links();
2362 #endif
2363
2364         flist = flist_new(0, "recv_file_list");
2365
2366         if (inc_recurse) {
2367                 if (flist->ndx_start == 1)
2368                         dir_flist = flist_new(FLIST_TEMP, "recv_file_list");
2369                 dstart = dir_flist->used;
2370         } else {
2371                 dir_flist = flist;
2372                 dstart = 0;
2373         }
2374
2375         while ((flags = read_byte(f)) != 0) {
2376                 struct file_struct *file;
2377
2378                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
2379                         flags |= read_byte(f) << 8;
2380
2381                 if (flags == (XMIT_EXTENDED_FLAGS|XMIT_IO_ERROR_ENDLIST)) {
2382                         int err;
2383                         if (protocol_version < 31) {
2384                                 rprintf(FERROR, "Invalid flist flag: %x\n", flags);
2385                                 exit_cleanup(RERR_PROTOCOL);
2386                         }
2387                         err = read_varint(f);
2388                         if (!ignore_errors)
2389                                 io_error |= err;
2390                         break;
2391                 }
2392
2393                 flist_expand(flist, 1);
2394                 file = recv_file_entry(flist, flags, f);
2395
2396                 if (S_ISREG(file->mode)) {
2397                         /* Already counted */
2398                 } else if (S_ISDIR(file->mode)) {
2399                         if (inc_recurse) {
2400                                 flist_expand(dir_flist, 1);
2401                                 dir_flist->files[dir_flist->used++] = file;
2402                         }
2403                         stats.num_dirs++;
2404                 } else if (S_ISLNK(file->mode))
2405                         stats.num_symlinks++;
2406                 else if (IS_DEVICE(file->mode))
2407                         stats.num_symlinks++;
2408                 else
2409                         stats.num_specials++;
2410
2411                 flist->files[flist->used++] = file;
2412
2413                 maybe_emit_filelist_progress(flist->used);
2414
2415                 if (DEBUG_GTE(FLIST, 2)) {
2416                         char *name = f_name(file, NULL);
2417                         rprintf(FINFO, "recv_file_name(%s)\n", NS(name));
2418                 }
2419         }
2420         file_total += flist->used;
2421
2422         if (DEBUG_GTE(FLIST, 2))
2423                 rprintf(FINFO, "received %d names\n", flist->used);
2424
2425         if (show_filelist_p())
2426                 finish_filelist_progress(flist);
2427
2428         if (need_unsorted_flist) {
2429                 /* Create an extra array of index pointers that we can sort for
2430                  * the generator's use (for wading through the files in sorted
2431                  * order and for calling flist_find()).  We keep the "files"
2432                  * list unsorted for our exchange of index numbers with the
2433                  * other side (since their names may not sort the same). */
2434                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2435                         out_of_memory("recv_file_list");
2436                 memcpy(flist->sorted, flist->files,
2437                        flist->used * sizeof (struct file_struct*));
2438                 if (inc_recurse && dir_flist->used > dstart) {
2439                         static int dir_flist_malloced = 0;
2440                         if (dir_flist_malloced < dir_flist->malloced) {
2441                                 dir_flist->sorted = realloc_array(dir_flist->sorted,
2442                                                         struct file_struct *,
2443                                                         dir_flist->malloced);
2444                                 dir_flist_malloced = dir_flist->malloced;
2445                         }
2446                         memcpy(dir_flist->sorted + dstart, dir_flist->files + dstart,
2447                                (dir_flist->used - dstart) * sizeof (struct file_struct*));
2448                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2449                 }
2450         } else {
2451                 flist->sorted = flist->files;
2452                 if (inc_recurse && dir_flist->used > dstart) {
2453                         dir_flist->sorted = dir_flist->files;
2454                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2455                 }
2456         }
2457
2458         if (inc_recurse)
2459                 flist_done_allocating(flist);
2460         else if (f >= 0) {
2461                 recv_id_list(f, flist);
2462                 flist_eof = 1;
2463         }
2464
2465         flist_sort_and_clean(flist, relative_paths);
2466
2467         if (protocol_version < 30) {
2468                 /* Recv the io_error flag */
2469                 int err = read_int(f);
2470                 if (!ignore_errors)
2471                         io_error |= err;
2472         } else if (inc_recurse && flist->ndx_start == 1) {
2473                 if (!file_total || strcmp(flist->sorted[flist->low]->basename, ".") != 0)
2474                         flist->parent_ndx = -1;
2475         }
2476
2477         if (DEBUG_GTE(FLIST, 3))
2478                 output_flist(flist);
2479
2480         if (DEBUG_GTE(FLIST, 2))
2481                 rprintf(FINFO, "recv_file_list done\n");
2482
2483         stats.flist_size += stats.total_read - start_read;
2484         stats.num_files += flist->used;
2485
2486         return flist;
2487 }
2488
2489 /* This is only used once by the receiver if the very first file-list
2490  * has exactly one item in it. */
2491 void recv_additional_file_list(int f)
2492 {
2493         struct file_list *flist;
2494         int ndx = read_ndx(f);
2495         if (ndx == NDX_FLIST_EOF) {
2496                 flist_eof = 1;
2497                 change_local_filter_dir(NULL, 0, 0);
2498         } else {
2499                 ndx = NDX_FLIST_OFFSET - ndx;
2500                 if (ndx < 0 || ndx >= dir_flist->used) {
2501                         ndx = NDX_FLIST_OFFSET - ndx;
2502                         rprintf(FERROR,
2503                                 "[%s] Invalid dir index: %d (%d - %d)\n",
2504                                 who_am_i(), ndx, NDX_FLIST_OFFSET,
2505                                 NDX_FLIST_OFFSET - dir_flist->used + 1);
2506                         exit_cleanup(RERR_PROTOCOL);
2507                 }
2508                 if (DEBUG_GTE(FLIST, 3)) {
2509                         rprintf(FINFO, "[%s] receiving flist for dir %d\n",
2510                                 who_am_i(), ndx);
2511                 }
2512                 flist = recv_file_list(f);
2513                 flist->parent_ndx = ndx;
2514         }
2515 }
2516
2517 /* Search for an identically-named item in the file list.  Note that the
2518  * items must agree in their directory-ness, or no match is returned. */
2519 int flist_find(struct file_list *flist, struct file_struct *f)
2520 {
2521         int low = flist->low, high = flist->high;
2522         int diff, mid, mid_up;
2523
2524         while (low <= high) {
2525                 mid = (low + high) / 2;
2526                 if (F_IS_ACTIVE(flist->sorted[mid]))
2527                         mid_up = mid;
2528                 else {
2529                         /* Scan for the next non-empty entry using the cached
2530                          * distance values.  If the value isn't fully up-to-
2531                          * date, update it. */
2532                         mid_up = mid + F_DEPTH(flist->sorted[mid]);
2533                         if (!F_IS_ACTIVE(flist->sorted[mid_up])) {
2534                                 do {
2535                                     mid_up += F_DEPTH(flist->sorted[mid_up]);
2536                                 } while (!F_IS_ACTIVE(flist->sorted[mid_up]));
2537                                 F_DEPTH(flist->sorted[mid]) = mid_up - mid;
2538                         }
2539                         if (mid_up > high) {
2540                                 /* If there's nothing left above us, set high to
2541                                  * a non-empty entry below us and continue. */
2542                                 high = mid - (int)flist->sorted[mid]->len32;
2543                                 if (!F_IS_ACTIVE(flist->sorted[high])) {
2544                                         do {
2545                                             high -= (int)flist->sorted[high]->len32;
2546                                         } while (!F_IS_ACTIVE(flist->sorted[high]));
2547                                         flist->sorted[mid]->len32 = mid - high;
2548                                 }
2549                                 continue;
2550                         }
2551                 }
2552                 diff = f_name_cmp(flist->sorted[mid_up], f);
2553                 if (diff == 0) {
2554                         if (protocol_version < 29
2555                             && S_ISDIR(flist->sorted[mid_up]->mode)
2556                             != S_ISDIR(f->mode))
2557                                 return -1;
2558                         return mid_up;
2559                 }
2560                 if (diff < 0)
2561                         low = mid_up + 1;
2562                 else
2563                         high = mid - 1;
2564         }
2565         return -1;
2566 }
2567
2568 /* Search for an identically-named item in the file list.  Differs from
2569  * flist_find in that an item that agrees with "f" in directory-ness is
2570  * preferred but one that does not is still found. */
2571 int flist_find_ignore_dirness(struct file_list *flist, struct file_struct *f)
2572 {
2573         mode_t save_mode;
2574         int ndx;
2575
2576         /* First look for an item that agrees in directory-ness. */
2577         ndx = flist_find(flist, f);
2578         if (ndx >= 0)
2579                 return ndx;
2580
2581         /* Temporarily flip f->mode to look for an item of opposite
2582          * directory-ness. */
2583         save_mode = f->mode;
2584         f->mode = S_ISDIR(f->mode) ? S_IFREG : S_IFDIR;
2585         ndx = flist_find(flist, f);
2586         f->mode = save_mode;
2587         return ndx;
2588 }
2589
2590 /*
2591  * Free up any resources a file_struct has allocated
2592  * and clear the file.
2593  */
2594 void clear_file(struct file_struct *file)
2595 {
2596         /* The +1 zeros out the first char of the basename. */
2597         memset(file, 0, FILE_STRUCT_LEN + 1);
2598         /* In an empty entry, F_DEPTH() is an offset to the next non-empty
2599          * entry.  Likewise for len32 in the opposite direction.  We assume
2600          * that we're alone for now since flist_find() will adjust the counts
2601          * it runs into that aren't up-to-date. */
2602         file->len32 = F_DEPTH(file) = 1;
2603 }
2604
2605 /* Allocate a new file list. */
2606 struct file_list *flist_new(int flags, char *msg)
2607 {
2608         struct file_list *flist;
2609
2610         if (!(flist = new0(struct file_list)))
2611                 out_of_memory(msg);
2612
2613         if (flags & FLIST_TEMP) {
2614                 if (!(flist->file_pool = pool_create(SMALL_EXTENT, 0,
2615                                                      out_of_memory,
2616                                                      POOL_INTERN)))
2617                         out_of_memory(msg);
2618         } else {
2619                 /* This is a doubly linked list with prev looping back to
2620                  * the end of the list, but the last next pointer is NULL. */
2621                 if (!first_flist) {
2622                         flist->file_pool = pool_create(NORMAL_EXTENT, 0,
2623                                                        out_of_memory,
2624                                                        POOL_INTERN);
2625                         if (!flist->file_pool)
2626                                 out_of_memory(msg);
2627
2628                         flist->ndx_start = flist->flist_num = inc_recurse ? 1 : 0;
2629
2630                         first_flist = cur_flist = flist->prev = flist;
2631                 } else {
2632                         struct file_list *prev = first_flist->prev;
2633
2634                         flist->file_pool = first_flist->file_pool;
2635
2636                         flist->ndx_start = prev->ndx_start + prev->used + 1;
2637                         flist->flist_num = prev->flist_num + 1;
2638
2639                         flist->prev = prev;
2640                         prev->next = first_flist->prev = flist;
2641                 }
2642                 flist->pool_boundary = pool_boundary(flist->file_pool, 0);
2643                 flist_cnt++;
2644         }
2645
2646         return flist;
2647 }
2648
2649 /* Free up all elements in a flist. */
2650 void flist_free(struct file_list *flist)
2651 {
2652         if (!flist->prev) {
2653                 /* Was FLIST_TEMP dir-list. */
2654         } else if (flist == flist->prev) {
2655                 first_flist = cur_flist = NULL;
2656                 file_total = 0;
2657                 flist_cnt = 0;
2658         } else {
2659                 if (flist == cur_flist)
2660                         cur_flist = flist->next;
2661                 if (flist == first_flist)
2662                         first_flist = first_flist->next;
2663                 else {
2664                         flist->prev->next = flist->next;
2665                         if (!flist->next)
2666                                 flist->next = first_flist;
2667                 }
2668                 flist->next->prev = flist->prev;
2669                 file_total -= flist->used;
2670                 flist_cnt--;
2671         }
2672
2673         if (!flist->prev || !flist_cnt)
2674                 pool_destroy(flist->file_pool);
2675         else
2676                 pool_free_old(flist->file_pool, flist->pool_boundary);
2677
2678         if (flist->sorted && flist->sorted != flist->files)
2679                 free(flist->sorted);
2680         free(flist->files);
2681         free(flist);
2682 }
2683
2684 /* This routine ensures we don't have any duplicate names in our file list.
2685  * duplicate names can cause corruption because of the pipelining. */
2686 static void flist_sort_and_clean(struct file_list *flist, int strip_root)
2687 {
2688         char fbuf[MAXPATHLEN];
2689         int i, prev_i;
2690
2691         if (!flist)
2692                 return;
2693         if (flist->used == 0) {
2694                 flist->high = -1;
2695                 flist->low = 0;
2696                 return;
2697         }
2698
2699         fsort(flist->sorted, flist->used);
2700
2701         if (!am_sender || inc_recurse) {
2702                 for (i = prev_i = 0; i < flist->used; i++) {
2703                         if (F_IS_ACTIVE(flist->sorted[i])) {
2704                                 prev_i = i;
2705                                 break;
2706                         }
2707                 }
2708                 flist->low = prev_i;
2709         } else {
2710                 i = prev_i = flist->used - 1;
2711                 flist->low = 0;
2712         }
2713
2714         while (++i < flist->used) {
2715                 int j;
2716                 struct file_struct *file = flist->sorted[i];
2717
2718                 if (!F_IS_ACTIVE(file))
2719                         continue;
2720                 if (f_name_cmp(file, flist->sorted[prev_i]) == 0)
2721                         j = prev_i;
2722                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
2723                         int save_mode = file->mode;
2724                         /* Make sure that this directory doesn't duplicate a
2725                          * non-directory earlier in the list. */
2726                         flist->high = prev_i;
2727                         file->mode = S_IFREG;
2728                         j = flist_find(flist, file);
2729                         file->mode = save_mode;
2730                 } else
2731                         j = -1;
2732                 if (j >= 0) {
2733                         int keep, drop;
2734                         /* If one is a dir and the other is not, we want to
2735                          * keep the dir because it might have contents in the
2736                          * list.  Otherwise keep the first one. */
2737                         if (S_ISDIR(file->mode)) {
2738                                 struct file_struct *fp = flist->sorted[j];
2739                                 if (!S_ISDIR(fp->mode))
2740                                         keep = i, drop = j;
2741                                 else {
2742                                         if (am_sender)
2743                                                 file->flags |= FLAG_DUPLICATE;
2744                                         else { /* Make sure we merge our vital flags. */
2745                                                 fp->flags |= file->flags & (FLAG_TOP_DIR|FLAG_CONTENT_DIR);
2746                                                 fp->flags &= file->flags | ~FLAG_IMPLIED_DIR;
2747                                         }
2748                                         keep = j, drop = i;
2749                                 }
2750                         } else
2751                                 keep = j, drop = i;
2752
2753                         if (!am_sender) {
2754                                 if (DEBUG_GTE(DUP, 1)) {
2755                                         rprintf(FINFO,
2756                                             "removing duplicate name %s from file list (%d)\n",
2757                                             f_name(file, fbuf), drop + flist->ndx_start);
2758                                 }
2759                                 clear_file(flist->sorted[drop]);
2760                         }
2761
2762                         if (keep == i) {
2763                                 if (flist->low == drop) {
2764                                         for (j = drop + 1;
2765                                              j < i && !F_IS_ACTIVE(flist->sorted[j]);
2766                                              j++) {}
2767                                         flist->low = j;
2768                                 }
2769                                 prev_i = i;
2770                         }
2771                 } else
2772                         prev_i = i;
2773         }
2774         flist->high = prev_i;
2775
2776         if (strip_root) {
2777                 /* We need to strip off the leading slashes for relative
2778                  * paths, but this must be done _after_ the sorting phase. */
2779                 for (i = flist->low; i <= flist->high; i++) {
2780                         struct file_struct *file = flist->sorted[i];
2781
2782                         if (!file->dirname)
2783                                 continue;
2784                         while (*file->dirname == '/')
2785                                 file->dirname++;
2786                         if (!*file->dirname)
2787                                 file->dirname = NULL;
2788                 }
2789         }
2790
2791         if (prune_empty_dirs && !am_sender) {
2792                 int j, prev_depth = 0;
2793
2794                 prev_i = 0; /* It's OK that this isn't really true. */
2795
2796                 for (i = flist->low; i <= flist->high; i++) {
2797                         struct file_struct *fp, *file = flist->sorted[i];
2798
2799                         /* This temporarily abuses the F_DEPTH() value for a
2800                          * directory that is in a chain that might get pruned.
2801                          * We restore the old value if it gets a reprieve. */
2802                         if (S_ISDIR(file->mode) && F_DEPTH(file)) {
2803                                 /* Dump empty dirs when coming back down. */
2804                                 for (j = prev_depth; j >= F_DEPTH(file); j--) {
2805                                         fp = flist->sorted[prev_i];
2806                                         if (F_DEPTH(fp) >= 0)
2807                                                 break;
2808                                         prev_i = -F_DEPTH(fp)-1;
2809                                         clear_file(fp);
2810                                 }
2811                                 prev_depth = F_DEPTH(file);
2812                                 if (is_excluded(f_name(file, fbuf), 1,
2813                                                        ALL_FILTERS)) {
2814                                         /* Keep dirs through this dir. */
2815                                         for (j = prev_depth-1; ; j--) {
2816                                                 fp = flist->sorted[prev_i];
2817                                                 if (F_DEPTH(fp) >= 0)
2818                                                         break;
2819                                                 prev_i = -F_DEPTH(fp)-1;
2820                                                 F_DEPTH(fp) = j;
2821                                         }
2822                                 } else
2823                                         F_DEPTH(file) = -prev_i-1;
2824                                 prev_i = i;
2825                         } else {
2826                                 /* Keep dirs through this non-dir. */
2827                                 for (j = prev_depth; ; j--) {
2828                                         fp = flist->sorted[prev_i];
2829                                         if (F_DEPTH(fp) >= 0)
2830                                                 break;
2831                                         prev_i = -F_DEPTH(fp)-1;
2832                                         F_DEPTH(fp) = j;
2833                                 }
2834                         }
2835                 }
2836                 /* Dump all remaining empty dirs. */
2837                 while (1) {
2838                         struct file_struct *fp = flist->sorted[prev_i];
2839                         if (F_DEPTH(fp) >= 0)
2840                                 break;
2841                         prev_i = -F_DEPTH(fp)-1;
2842                         clear_file(fp);
2843                 }
2844
2845                 for (i = flist->low; i <= flist->high; i++) {
2846                         if (F_IS_ACTIVE(flist->sorted[i]))
2847                                 break;
2848                 }
2849                 flist->low = i;
2850                 for (i = flist->high; i >= flist->low; i--) {
2851                         if (F_IS_ACTIVE(flist->sorted[i]))
2852                                 break;
2853                 }
2854                 flist->high = i;
2855         }
2856 }
2857
2858 static void output_flist(struct file_list *flist)
2859 {
2860         char uidbuf[16], gidbuf[16], depthbuf[16];
2861         struct file_struct *file;
2862         const char *root, *dir, *slash, *name, *trail;
2863         const char *who = who_am_i();
2864         int i;
2865
2866         rprintf(FINFO, "[%s] flist start=%d, used=%d, low=%d, high=%d\n",
2867                 who, flist->ndx_start, flist->used, flist->low, flist->high);
2868         for (i = 0; i < flist->used; i++) {
2869                 file = flist->files[i];
2870                 if ((am_root || am_sender) && uid_ndx) {
2871                         snprintf(uidbuf, sizeof uidbuf, " uid=%u",
2872                                  F_OWNER(file));
2873                 } else
2874                         *uidbuf = '\0';
2875                 if (gid_ndx) {
2876                         static char parens[] = "(\0)\0\0\0";
2877                         char *pp = parens + (file->flags & FLAG_SKIP_GROUP ? 0 : 3);
2878                         snprintf(gidbuf, sizeof gidbuf, " gid=%s%u%s",
2879                                  pp, F_GROUP(file), pp + 2);
2880                 } else
2881                         *gidbuf = '\0';
2882                 if (!am_sender)
2883                         snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file));
2884                 if (F_IS_ACTIVE(file)) {
2885                         root = am_sender ? NS(F_PATHNAME(file)) : depthbuf;
2886                         if ((dir = file->dirname) == NULL)
2887                                 dir = slash = "";
2888                         else
2889                                 slash = "/";
2890                         name = file->basename;
2891                         trail = S_ISDIR(file->mode) ? "/" : "";
2892                 } else
2893                         root = dir = slash = name = trail = "";
2894                 rprintf(FINFO,
2895                         "[%s] i=%d %s %s%s%s%s mode=0%o len=%s%s%s flags=%x\n",
2896                         who, i + flist->ndx_start,
2897                         root, dir, slash, name, trail,
2898                         (int)file->mode, comma_num(F_LENGTH(file)),
2899                         uidbuf, gidbuf, file->flags);
2900         }
2901 }
2902
2903 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
2904 enum fnc_type { t_PATH, t_ITEM };
2905
2906 static int found_prefix;
2907
2908 /* Compare the names of two file_struct entities, similar to how strcmp()
2909  * would do if it were operating on the joined strings.
2910  *
2911  * Some differences beginning with protocol_version 29: (1) directory names
2912  * are compared with an assumed trailing slash so that they compare in a
2913  * way that would cause them to sort immediately prior to any content they
2914  * may have; (2) a directory of any name compares after a non-directory of
2915  * any name at the same depth; (3) a directory with name "." compares prior
2916  * to anything else.  These changes mean that a directory and a non-dir
2917  * with the same name will not compare as equal (protocol_version >= 29).
2918  *
2919  * The dirname component can be an empty string, but the basename component
2920  * cannot (and never is in the current codebase).  The basename component
2921  * may be NULL (for a removed item), in which case it is considered to be
2922  * after any existing item. */
2923 int f_name_cmp(const struct file_struct *f1, const struct file_struct *f2)
2924 {
2925         int dif;
2926         const uchar *c1, *c2;
2927         enum fnc_state state1, state2;
2928         enum fnc_type type1, type2;
2929         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
2930
2931         if (!f1 || !F_IS_ACTIVE(f1)) {
2932                 if (!f2 || !F_IS_ACTIVE(f2))
2933                         return 0;
2934                 return -1;
2935         }
2936         if (!f2 || !F_IS_ACTIVE(f2))
2937                 return 1;
2938
2939         c1 = (uchar*)f1->dirname;
2940         c2 = (uchar*)f2->dirname;
2941         if (c1 == c2)
2942                 c1 = c2 = NULL;
2943         if (!c1) {
2944                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2945                 c1 = (const uchar*)f1->basename;
2946                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2947                         type1 = t_ITEM;
2948                         state1 = s_TRAILING;
2949                         c1 = (uchar*)"";
2950                 } else
2951                         state1 = s_BASE;
2952         } else {
2953                 type1 = t_path;
2954                 state1 = s_DIR;
2955         }
2956         if (!c2) {
2957                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2958                 c2 = (const uchar*)f2->basename;
2959                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2960                         type2 = t_ITEM;
2961                         state2 = s_TRAILING;
2962                         c2 = (uchar*)"";
2963                 } else
2964                         state2 = s_BASE;
2965         } else {
2966                 type2 = t_path;
2967                 state2 = s_DIR;
2968         }
2969
2970         if (type1 != type2)
2971                 return type1 == t_PATH ? 1 : -1;
2972
2973         do {
2974                 if (!*c1) {
2975                         switch (state1) {
2976                         case s_DIR:
2977                                 state1 = s_SLASH;
2978                                 c1 = (uchar*)"/";
2979                                 break;
2980                         case s_SLASH:
2981                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2982                                 c1 = (const uchar*)f1->basename;
2983                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2984                                         type1 = t_ITEM;
2985                                         state1 = s_TRAILING;
2986                                         c1 = (uchar*)"";
2987                                 } else
2988                                         state1 = s_BASE;
2989                                 break;
2990                         case s_BASE:
2991                                 state1 = s_TRAILING;
2992                                 if (type1 == t_PATH) {
2993                                         c1 = (uchar*)"/";
2994                                         break;
2995                                 }
2996                                 /* FALL THROUGH */
2997                         case s_TRAILING:
2998                                 type1 = t_ITEM;
2999                                 break;
3000                         }
3001                         if (*c2 && type1 != type2)
3002                                 return type1 == t_PATH ? 1 : -1;
3003                 }
3004                 if (!*c2) {
3005                         switch (state2) {
3006                         case s_DIR:
3007                                 state2 = s_SLASH;
3008                                 c2 = (uchar*)"/";
3009                                 break;
3010                         case s_SLASH:
3011                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
3012                                 c2 = (const uchar*)f2->basename;
3013                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
3014                                         type2 = t_ITEM;
3015                                         state2 = s_TRAILING;
3016                                         c2 = (uchar*)"";
3017                                 } else
3018                                         state2 = s_BASE;
3019                                 break;
3020                         case s_BASE:
3021                                 state2 = s_TRAILING;
3022                                 if (type2 == t_PATH) {
3023                                         c2 = (uchar*)"/";
3024                                         break;
3025                                 }
3026                                 /* FALL THROUGH */
3027                         case s_TRAILING:
3028                                 found_prefix = 1;
3029                                 if (!*c1)
3030                                         return 0;
3031                                 type2 = t_ITEM;
3032                                 break;
3033                         }
3034                         if (type1 != type2)
3035                                 return type1 == t_PATH ? 1 : -1;
3036                 }
3037         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
3038
3039         return dif;
3040 }
3041
3042 /* Returns 1 if f1's filename has all of f2's filename as a prefix.  This does
3043  * not match if f2's basename is not an exact match of a path element in f1.
3044  * E.g. /path/foo is not a prefix of /path/foobar/baz, but /path/foobar is. */
3045 int f_name_has_prefix(const struct file_struct *f1, const struct file_struct *f2)
3046 {
3047         found_prefix = 0;
3048         f_name_cmp(f1, f2);
3049         return found_prefix;
3050 }
3051
3052 char *f_name_buf(void)
3053 {
3054         static char names[5][MAXPATHLEN];
3055         static unsigned int n;
3056
3057         n = (n + 1) % (sizeof names / sizeof names[0]);
3058
3059         return names[n];
3060 }
3061
3062 /* Return a copy of the full filename of a flist entry, using the indicated
3063  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
3064  * done because we checked the size when creating the file_struct entry.
3065  */
3066 char *f_name(const struct file_struct *f, char *fbuf)
3067 {
3068         if (!f || !F_IS_ACTIVE(f))
3069                 return NULL;
3070
3071         if (!fbuf)
3072                 fbuf = f_name_buf();
3073
3074         if (f->dirname) {
3075                 int len = strlen(f->dirname);
3076                 memcpy(fbuf, f->dirname, len);
3077                 fbuf[len] = '/';
3078                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
3079         } else
3080                 strlcpy(fbuf, f->basename, MAXPATHLEN);
3081
3082         return fbuf;
3083 }
3084
3085 /* Do a non-recursive scan of the named directory, possibly ignoring all
3086  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
3087  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
3088  * buffer (the functions we call will append names onto the end, but the old
3089  * dir value will be restored on exit). */
3090 struct file_list *get_dirlist(char *dirname, int dlen, int ignore_filter_rules)
3091 {
3092         struct file_list *dirlist;
3093         char dirbuf[MAXPATHLEN];
3094         int save_recurse = recurse;
3095         int save_xfer_dirs = xfer_dirs;
3096         int save_prune_empty_dirs = prune_empty_dirs;
3097
3098         if (dlen < 0) {
3099                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
3100                 if (dlen >= MAXPATHLEN)
3101                         return NULL;
3102                 dirname = dirbuf;
3103         }
3104
3105         dirlist = flist_new(FLIST_TEMP, "get_dirlist");
3106
3107         recurse = 0;
3108         xfer_dirs = 1;
3109         send_directory(ignore_filter_rules ? -2 : -1, dirlist, dirname, dlen, 0);
3110         xfer_dirs = save_xfer_dirs;
3111         recurse = save_recurse;
3112         if (INFO_GTE(PROGRESS, 1))
3113                 flist_count_offset += dirlist->used;
3114
3115         prune_empty_dirs = 0;
3116         dirlist->sorted = dirlist->files;
3117         flist_sort_and_clean(dirlist, 0);
3118         prune_empty_dirs = save_prune_empty_dirs;
3119
3120         if (DEBUG_GTE(FLIST, 3))
3121                 output_flist(dirlist);
3122
3123         return dirlist;
3124 }