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 filter_rule_list filter_list;
  83 extern filter_rule_list 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                 if (protocol_version < 28) {
 447                         if (tmp_rdev == rdev)
 448                                 xflags |= XMIT_SAME_RDEV_pre28;
 449                         else
 450                                 rdev = tmp_rdev;
 451                 } else {
 452                         rdev = tmp_rdev;
 453                         if ((uint32)major(rdev) == rdev_major)
 454                                 xflags |= XMIT_SAME_RDEV_MAJOR;
 455                         else
 456                                 rdev_major = major(rdev);
 457                         if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu)
 458                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
 459                 }
 460         } else if (preserve_specials && IS_SPECIAL(mode) && protocol_version < 31) {
 461                 /* Special files don't need an rdev number, so just make
 462                  * the historical transmission of the value efficient. */
 463                 if (protocol_version < 28)
 464                         xflags |= XMIT_SAME_RDEV_pre28;
 465                 else {
 466                         rdev = MAKEDEV(major(rdev), 0);
 467                         xflags |= XMIT_SAME_RDEV_MAJOR;
 468                         if (protocol_version < 30)
 469                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
 470                 }
 471         } else if (protocol_version < 28)
 472                 rdev = MAKEDEV(0, 0);
 473         if (!preserve_uid || ((uid_t)F_OWNER(file) == uid && *lastname))
 474                 xflags |= XMIT_SAME_UID;
 475         else {
 476                 uid = F_OWNER(file);
 477                 if (!numeric_ids) {
 478                         user_name = add_uid(uid);
 479                         if (inc_recurse && user_name)
 480                                 xflags |= XMIT_USER_NAME_FOLLOWS;
 481                 }
 482         }
 483         if (!preserve_gid || ((gid_t)F_GROUP(file) == gid && *lastname))
 484                 xflags |= XMIT_SAME_GID;
 485         else {
 486                 gid = F_GROUP(file);
 487                 if (!numeric_ids) {
 488                         group_name = add_gid(gid);
 489                         if (inc_recurse && group_name)
 490                                 xflags |= XMIT_GROUP_NAME_FOLLOWS;
 491                 }
 492         }
 493         if (file->modtime == modtime)
 494                 xflags |= XMIT_SAME_TIME;
 495         else
 496                 modtime = file->modtime;
 497
 498 #ifdef SUPPORT_HARD_LINKS
 499         if (tmp_dev != 0) {
 500                 if (protocol_version >= 30) {
 501                         struct ht_int64_node *np = idev_find(tmp_dev, tmp_ino);
 502                         first_hlink_ndx = (int32)(long)np->data - 1;
 503                         if (first_hlink_ndx < 0) {
 504                                 np->data = (void*)(long)(first_ndx + ndx + 1);
 505                                 xflags |= XMIT_HLINK_FIRST;
 506                         }
 507                         if (DEBUG_GTE(HLINK, 1)) {
 508                                 if (first_hlink_ndx >= 0) {
 509                                         rprintf(FINFO, "[%s] #%d hard-links #%d (%sabbrev)\n",
 510                                                 who_am_i(), first_ndx + ndx, first_hlink_ndx,
 511                                                 first_hlink_ndx >= first_ndx ? "" : "un");
 512                                 } else if (DEBUG_GTE(HLINK, 3)) {
 513                                         rprintf(FINFO, "[%s] dev:inode for #%d is %s:%s\n",
 514                                                 who_am_i(), first_ndx + ndx,
 515                                                 big_num(tmp_dev), big_num(tmp_ino));
 516                                 }
 517                         }
 518                 } else {
 519                         if (tmp_dev == dev) {
 520                                 if (protocol_version >= 28)
 521                                         xflags |= XMIT_SAME_DEV_pre30;
 522                         } else
 523                                 dev = tmp_dev;
 524                 }
 525                 xflags |= XMIT_HLINKED;
 526         }
 527 #endif
 528
 529         for (l1 = 0;
 530             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 531             l1++) {}
 532         l2 = strlen(fname+l1);
 533
 534         if (l1 > 0)
 535                 xflags |= XMIT_SAME_NAME;
 536         if (l2 > 255)
 537                 xflags |= XMIT_LONG_NAME;
 538
 539         /* We must make sure we don't send a zero flag byte or the
 540          * other end will terminate the flist transfer.  Note that
 541          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 542          * it's harmless way to add a bit to the first flag byte. */
 543         if (protocol_version >= 28) {
 544                 if (!xflags && !S_ISDIR(mode))
 545                         xflags |= XMIT_TOP_DIR;
 546                 if ((xflags & 0xFF00) || !xflags) {
 547                         xflags |= XMIT_EXTENDED_FLAGS;
 548                         write_shortint(f, xflags);
 549                 } else
 550                         write_byte(f, xflags);
 551         } else {
 552                 if (!(xflags & 0xFF))
 553                         xflags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
 554                 write_byte(f, xflags);
 555         }
 556         if (xflags & XMIT_SAME_NAME)
 557                 write_byte(f, l1);
 558         if (xflags & XMIT_LONG_NAME)
 559                 write_varint30(f, l2);
 560         else
 561                 write_byte(f, l2);
 562         write_buf(f, fname + l1, l2);
 563
 564 #ifdef SUPPORT_HARD_LINKS
 565         if (first_hlink_ndx >= 0) {
 566                 write_varint(f, first_hlink_ndx);
 567                 if (first_hlink_ndx >= first_ndx)
 568                         goto the_end;
 569         }
 570 #endif
 571
 572         write_varlong30(f, F_LENGTH(file), 3);
 573         if (!(xflags & XMIT_SAME_TIME)) {
 574                 if (protocol_version >= 30)
 575                         write_varlong(f, modtime, 4);
 576                 else
 577                         write_int(f, modtime);
 578         }
 579         if (!(xflags & XMIT_SAME_MODE))
 580                 write_int(f, to_wire_mode(mode));
 581         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
 582                 if (protocol_version < 30)
 583                         write_int(f, uid);
 584                 else {
 585                         write_varint(f, uid);
 586                         if (xflags & XMIT_USER_NAME_FOLLOWS) {
 587                                 int len = strlen(user_name);
 588                                 write_byte(f, len);
 589                                 write_buf(f, user_name, len);
 590                         }
 591                 }
 592         }
 593         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
 594                 if (protocol_version < 30)
 595                         write_int(f, gid);
 596                 else {
 597                         write_varint(f, gid);
 598                         if (xflags & XMIT_GROUP_NAME_FOLLOWS) {
 599                                 int len = strlen(group_name);
 600                                 write_byte(f, len);
 601                                 write_buf(f, group_name, len);
 602                         }
 603                 }
 604         }
 605         if ((preserve_devices && IS_DEVICE(mode))
 606          || (preserve_specials && IS_SPECIAL(mode) && protocol_version < 31)) {
 607                 if (protocol_version < 28) {
 608                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 609                                 write_int(f, (int)rdev);
 610                 } else {
 611                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 612                                 write_varint30(f, major(rdev));
 613                         if (protocol_version >= 30)
 614                                 write_varint(f, minor(rdev));
 615                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 616                                 write_byte(f, minor(rdev));
 617                         else
 618                                 write_int(f, minor(rdev));
 619                 }
 620         }
 621
 622 #ifdef SUPPORT_LINKS
 623         if (symlink_len) {
 624                 write_varint30(f, symlink_len);
 625                 write_buf(f, symlink_name, symlink_len);
 626         }
 627 #endif
 628
 629 #ifdef SUPPORT_HARD_LINKS
 630         if (tmp_dev != 0 && protocol_version < 30) {
 631                 if (protocol_version < 26) {
 632                         /* 32-bit dev_t and ino_t */
 633                         write_int(f, (int32)dev);
 634                         write_int(f, (int32)tmp_ino);
 635                 } else {
 636                         /* 64-bit dev_t and ino_t */
 637                         if (!(xflags & XMIT_SAME_DEV_pre30))
 638                                 write_longint(f, dev);
 639                         write_longint(f, tmp_ino);
 640                 }
 641         }
 642 #endif
 643
 644         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 645                 const char *sum;
 646                 if (S_ISREG(mode))
 647                         sum = tmp_sum;
 648                 else {
 649                         /* Prior to 28, we sent a useless set of nulls. */
 650                         sum = empty_sum;
 651                 }
 652                 write_buf(f, sum, checksum_len);
 653         }
 654
 655 #ifdef SUPPORT_HARD_LINKS
 656   the_end:
 657 #endif
 658         strlcpy(lastname, fname, MAXPATHLEN);
 659
 660         if (S_ISREG(mode) || S_ISLNK(mode))
 661                 stats.total_size += F_LENGTH(file);
 662 }
 663
 664 static struct file_struct *recv_file_entry(struct file_list *flist,
 665                                            int xflags, int f)
 666 {
 667         static int64 modtime;
 668         static mode_t mode;
 669 #ifdef SUPPORT_HARD_LINKS
 670         static int64 dev;
 671 #endif
 672         static dev_t rdev;
 673         static uint32 rdev_major;
 674         static uid_t uid;
 675         static gid_t gid;
 676         static uint16 gid_flags;
 677         static char lastname[MAXPATHLEN], *lastdir;
 678         static int lastdir_depth, lastdir_len = -1;
 679         static unsigned int del_hier_name_len = 0;
 680         static int in_del_hier = 0;
 681         char thisname[MAXPATHLEN];
 682         unsigned int l1 = 0, l2 = 0;
 683         int alloc_len, basename_len, linkname_len;
 684         int extra_len = file_extra_cnt * EXTRA_LEN;
 685         int first_hlink_ndx = -1;
 686         int64 file_length;
 687         const char *basename;
 688         struct file_struct *file;
 689         alloc_pool_t *pool;
 690         char *bp;
 691
 692         if (xflags & XMIT_SAME_NAME)
 693                 l1 = read_byte(f);
 694
 695         if (xflags & XMIT_LONG_NAME)
 696                 l2 = read_varint30(f);
 697         else
 698                 l2 = read_byte(f);
 699
 700         if (l2 >= MAXPATHLEN - l1) {
 701                 rprintf(FERROR,
 702                         "overflow: xflags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
 703                         xflags, l1, l2, lastname, who_am_i());
 704                 overflow_exit("recv_file_entry");
 705         }
 706
 707         strlcpy(thisname, lastname, l1 + 1);
 708         read_sbuf(f, &thisname[l1], l2);
 709         thisname[l1 + l2] = 0;
 710
 711         /* Abuse basename_len for a moment... */
 712         basename_len = strlcpy(lastname, thisname, MAXPATHLEN);
 713
 714 #ifdef ICONV_OPTION
 715         if (ic_recv != (iconv_t)-1) {
 716                 xbuf outbuf, inbuf;
 717
 718                 INIT_CONST_XBUF(outbuf, thisname);
 719                 INIT_XBUF(inbuf, lastname, basename_len, (size_t)-1);
 720
 721                 if (iconvbufs(ic_recv, &inbuf, &outbuf, 0) < 0) {
 722                         io_error |= IOERR_GENERAL;
 723                         rprintf(FERROR_UTF8,
 724                             "[%s] cannot convert filename: %s (%s)\n",
 725                             who_am_i(), lastname, strerror(errno));
 726                         outbuf.len = 0;
 727                 }
 728                 thisname[outbuf.len] = '\0';
 729         }
 730 #endif
 731
 732         if (*thisname)
 733                 clean_fname(thisname, 0);
 734
 735         if (sanitize_paths)
 736                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
 737
 738         if ((basename = strrchr(thisname, '/')) != NULL) {
 739                 int len = basename++ - thisname;
 740                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
 741                         lastdir = new_array(char, len + 1);
 742                         memcpy(lastdir, thisname, len);
 743                         lastdir[len] = '\0';
 744                         lastdir_len = len;
 745                         lastdir_depth = count_dir_elements(lastdir);
 746                 }
 747         } else
 748                 basename = thisname;
 749         basename_len = strlen(basename) + 1; /* count the '\0' */
 750
 751 #ifdef SUPPORT_HARD_LINKS
 752         if (protocol_version >= 30
 753          && BITS_SETnUNSET(xflags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
 754                 first_hlink_ndx = read_varint(f);
 755                 if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->ndx_start + flist->used) {
 756                         rprintf(FERROR,
 757                                 "hard-link reference out of range: %d (%d)\n",
 758                                 first_hlink_ndx, flist->ndx_start + flist->used);
 759                         exit_cleanup(RERR_PROTOCOL);
 760                 }
 761                 if (DEBUG_GTE(HLINK, 1)) {
 762                         rprintf(FINFO, "[%s] #%d hard-links #%d (%sabbrev)\n",
 763                                 who_am_i(), flist->used+flist->ndx_start, first_hlink_ndx,
 764                                 first_hlink_ndx >= flist->ndx_start ? "" : "un");
 765                 }
 766                 if (first_hlink_ndx >= flist->ndx_start) {
 767                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 768                         file_length = F_LENGTH(first);
 769                         modtime = first->modtime;
 770                         mode = first->mode;
 771                         if (preserve_uid)
 772                                 uid = F_OWNER(first);
 773                         if (preserve_gid)
 774                                 gid = F_GROUP(first);
 775                         if (preserve_devices && IS_DEVICE(mode)) {
 776                                 uint32 *devp = F_RDEV_P(first);
 777                                 rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
 778                                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 779                         }
 780                         if (preserve_links && S_ISLNK(mode))
 781                                 linkname_len = strlen(F_SYMLINK(first)) + 1;
 782                         else
 783                                 linkname_len = 0;
 784                         goto create_object;
 785                 }
 786         }
 787 #endif
 788
 789         file_length = read_varlong30(f, 3);
 790         if (!(xflags & XMIT_SAME_TIME)) {
 791                 if (protocol_version >= 30) {
 792                         modtime = read_varlong(f, 4);
 793 #if SIZEOF_TIME_T < SIZEOF_INT64
 794                         if (!am_generator && (int64)(time_t)modtime != modtime) {
 795                                 rprintf(FERROR_XFER,
 796                                     "Time value of %s truncated on receiver.\n",
 797                                     lastname);
 798                         }
 799 #endif
 800                 } else
 801                         modtime = read_int(f);
 802         }
 803         if (!(xflags & XMIT_SAME_MODE))
 804                 mode = from_wire_mode(read_int(f));
 805
 806         if (chmod_modes && !S_ISLNK(mode) && mode)
 807                 mode = tweak_mode(mode, chmod_modes);
 808
 809         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
 810                 if (protocol_version < 30)
 811                         uid = (uid_t)read_int(f);
 812                 else {
 813                         uid = (uid_t)read_varint(f);
 814                         if (xflags & XMIT_USER_NAME_FOLLOWS)
 815                                 uid = recv_user_name(f, uid);
 816                         else if (inc_recurse && am_root && (!numeric_ids || usermap))
 817                                 uid = match_uid(uid);
 818                 }
 819         }
 820         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
 821                 if (protocol_version < 30)
 822                         gid = (gid_t)read_int(f);
 823                 else {
 824                         gid = (gid_t)read_varint(f);
 825                         gid_flags = 0;
 826                         if (xflags & XMIT_GROUP_NAME_FOLLOWS)
 827                                 gid = recv_group_name(f, gid, &gid_flags);
 828                         else if (inc_recurse && (!am_root || !numeric_ids || groupmap))
 829                                 gid = match_gid(gid, &gid_flags);
 830                 }
 831         }
 832
 833         if ((preserve_devices && IS_DEVICE(mode))
 834          || (preserve_specials && IS_SPECIAL(mode) && protocol_version < 31)) {
 835                 if (protocol_version < 28) {
 836                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 837                                 rdev = (dev_t)read_int(f);
 838                 } else {
 839                         uint32 rdev_minor;
 840                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 841                                 rdev_major = read_varint30(f);
 842                         if (protocol_version >= 30)
 843                                 rdev_minor = read_varint(f);
 844                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 845                                 rdev_minor = read_byte(f);
 846                         else
 847                                 rdev_minor = read_int(f);
 848                         rdev = MAKEDEV(rdev_major, rdev_minor);
 849                 }
 850                 if (IS_DEVICE(mode))
 851                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 852                 file_length = 0;
 853         } else if (protocol_version < 28)
 854                 rdev = MAKEDEV(0, 0);
 855
 856 #ifdef SUPPORT_LINKS
 857         if (preserve_links && S_ISLNK(mode)) {
 858                 linkname_len = read_varint30(f) + 1; /* count the '\0' */
 859                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 860                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 861                                 linkname_len - 1);
 862                         overflow_exit("recv_file_entry");
 863                 }
 864 #ifdef ICONV_OPTION
 865                 /* We don't know how much extra room we need to convert
 866                  * the as-yet-unread symlink data, so let's hope that a
 867                  * double-size buffer is plenty. */
 868                 if (sender_symlink_iconv)
 869                         linkname_len *= 2;
 870 #endif
 871                 if (munge_symlinks)
 872                         linkname_len += SYMLINK_PREFIX_LEN;
 873         }
 874         else
 875 #endif
 876                 linkname_len = 0;
 877
 878 #ifdef SUPPORT_HARD_LINKS
 879   create_object:
 880         if (preserve_hard_links) {
 881                 if (protocol_version < 28 && S_ISREG(mode))
 882                         xflags |= XMIT_HLINKED;
 883                 if (xflags & XMIT_HLINKED)
 884                         extra_len += (inc_recurse+1) * EXTRA_LEN;
 885         }
 886 #endif
 887
 888 #ifdef SUPPORT_ACLS
 889         /* Directories need an extra int32 for the default ACL. */
 890         if (preserve_acls && S_ISDIR(mode))
 891                 extra_len += EXTRA_LEN;
 892 #endif
 893
 894         if (always_checksum && S_ISREG(mode))
 895                 extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
 896
 897 #if SIZEOF_INT64 >= 8
 898         if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
 899                 extra_len += EXTRA_LEN;
 900 #endif
 901         if (file_length < 0) {
 902                 rprintf(FERROR, "Offset underflow: file-length is negative\n");
 903                 exit_cleanup(RERR_UNSUPPORTED);
 904         }
 905
 906         if (inc_recurse && S_ISDIR(mode)) {
 907                 if (one_file_system) {
 908                         /* Room to save the dir's device for -x */
 909                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 910                 }
 911                 pool = dir_flist->file_pool;
 912         } else
 913                 pool = flist->file_pool;
 914
 915 #if EXTRA_ROUNDING > 0
 916         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
 917                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
 918 #endif
 919
 920         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
 921                   + linkname_len;
 922         bp = pool_alloc(pool, alloc_len, "recv_file_entry");
 923
 924         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
 925         bp += extra_len;
 926         file = (struct file_struct *)bp;
 927         bp += FILE_STRUCT_LEN;
 928
 929         memcpy(bp, basename, basename_len);
 930
 931 #ifdef SUPPORT_HARD_LINKS
 932         if (xflags & XMIT_HLINKED)
 933                 file->flags |= FLAG_HLINKED;
 934 #endif
 935         file->modtime = (time_t)modtime;
 936         file->len32 = (uint32)file_length;
 937 #if SIZEOF_INT64 >= 8
 938         if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
 939 #if SIZEOF_CAPITAL_OFF_T < 8
 940                 rprintf(FERROR, "Offset overflow: attempted 64-bit file-length\n");
 941                 exit_cleanup(RERR_UNSUPPORTED);
 942 #else
 943                 file->flags |= FLAG_LENGTH64;
 944                 OPT_EXTRA(file, 0)->unum = (uint32)(file_length >> 32);
 945 #endif
 946         }
 947 #endif
 948         file->mode = mode;
 949         if (preserve_uid)
 950                 F_OWNER(file) = uid;
 951         if (preserve_gid) {
 952                 F_GROUP(file) = gid;
 953                 file->flags |= gid_flags;
 954         }
 955         if (unsort_ndx)
 956                 F_NDX(file) = flist->used + flist->ndx_start;
 957
 958         if (basename != thisname) {
 959                 file->dirname = lastdir;
 960                 F_DEPTH(file) = lastdir_depth + 1;
 961         } else
 962                 F_DEPTH(file) = 1;
 963
 964         if (S_ISDIR(mode)) {
 965                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
 966                         F_DEPTH(file)--;
 967                 if (protocol_version >= 30) {
 968                         if (!(xflags & XMIT_NO_CONTENT_DIR)) {
 969                                 if (xflags & XMIT_TOP_DIR)
 970                                         file->flags |= FLAG_TOP_DIR;
 971                                 file->flags |= FLAG_CONTENT_DIR;
 972                         } else if (xflags & XMIT_TOP_DIR)
 973                                 file->flags |= FLAG_IMPLIED_DIR;
 974                 } else if (xflags & XMIT_TOP_DIR) {
 975                         in_del_hier = recurse;
 976                         del_hier_name_len = F_DEPTH(file) == 0 ? 0 : l1 + l2;
 977                         if (relative_paths && del_hier_name_len > 2
 978                             && lastname[del_hier_name_len-1] == '.'
 979                             && lastname[del_hier_name_len-2] == '/')
 980                                 del_hier_name_len -= 2;
 981                         file->flags |= FLAG_TOP_DIR | FLAG_CONTENT_DIR;
 982                 } else if (in_del_hier) {
 983                         if (!relative_paths || !del_hier_name_len
 984                          || (l1 >= del_hier_name_len
 985                           && lastname[del_hier_name_len] == '/'))
 986                                 file->flags |= FLAG_CONTENT_DIR;
 987                         else
 988                                 in_del_hier = 0;
 989                 }
 990         }
 991
 992         if (preserve_devices && IS_DEVICE(mode)) {
 993                 uint32 *devp = F_RDEV_P(file);
 994                 DEV_MAJOR(devp) = major(rdev);
 995                 DEV_MINOR(devp) = minor(rdev);
 996         }
 997
 998 #ifdef SUPPORT_LINKS
 999         if (linkname_len) {
1000                 bp += basename_len;
1001                 if (first_hlink_ndx >= flist->ndx_start) {
1002                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
1003                         memcpy(bp, F_SYMLINK(first), linkname_len);
1004                 } else {
1005                         if (munge_symlinks) {
1006                                 strlcpy(bp, SYMLINK_PREFIX, linkname_len);
1007                                 bp += SYMLINK_PREFIX_LEN;
1008                                 linkname_len -= SYMLINK_PREFIX_LEN;
1009                         }
1010 #ifdef ICONV_OPTION
1011                         if (sender_symlink_iconv) {
1012                                 xbuf outbuf, inbuf;
1013
1014                                 alloc_len = linkname_len;
1015                                 linkname_len /= 2;
1016
1017                                 /* Read the symlink data into the end of our double-sized
1018                                  * buffer and then convert it into the right spot. */
1019                                 INIT_XBUF(inbuf, bp + alloc_len - linkname_len,
1020                                           linkname_len - 1, (size_t)-1);
1021                                 read_sbuf(f, inbuf.buf, inbuf.len);
1022                                 INIT_XBUF(outbuf, bp, 0, alloc_len);
1023
1024                                 if (iconvbufs(ic_recv, &inbuf, &outbuf, 0) < 0) {
1025                                         io_error |= IOERR_GENERAL;
1026                                         rprintf(FERROR_XFER,
1027                                             "[%s] cannot convert symlink data for: %s (%s)\n",
1028                                             who_am_i(), full_fname(thisname), strerror(errno));
1029                                         bp = (char*)file->basename;
1030                                         *bp++ = '\0';
1031                                         outbuf.len = 0;
1032                                 }
1033                                 bp[outbuf.len] = '\0';
1034                         } else
1035 #endif
1036                                 read_sbuf(f, bp, linkname_len - 1);
1037                         if (sanitize_paths && !munge_symlinks && *bp)
1038                                 sanitize_path(bp, bp, "", lastdir_depth, SP_DEFAULT);
1039                 }
1040         }
1041 #endif
1042
1043 #ifdef SUPPORT_HARD_LINKS
1044         if (preserve_hard_links && xflags & XMIT_HLINKED) {
1045                 if (protocol_version >= 30) {
1046                         if (xflags & XMIT_HLINK_FIRST) {
1047                                 F_HL_GNUM(file) = flist->ndx_start + flist->used;
1048                         } else
1049                                 F_HL_GNUM(file) = first_hlink_ndx;
1050                 } else {
1051                         static int32 cnt = 0;
1052                         struct ht_int64_node *np;
1053                         int64 ino;
1054                         int32 ndx;
1055                         if (protocol_version < 26) {
1056                                 dev = read_int(f);
1057                                 ino = read_int(f);
1058                         } else {
1059                                 if (!(xflags & XMIT_SAME_DEV_pre30))
1060                                         dev = read_longint(f);
1061                                 ino = read_longint(f);
1062                         }
1063                         np = idev_find(dev, ino);
1064                         ndx = (int32)(long)np->data - 1;
1065                         if (ndx < 0) {
1066                                 ndx = cnt++;
1067                                 np->data = (void*)(long)cnt;
1068                         }
1069                         F_HL_GNUM(file) = ndx;
1070                 }
1071         }
1072 #endif
1073
1074         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
1075                 if (S_ISREG(mode))
1076                         bp = F_SUM(file);
1077                 else {
1078                         /* Prior to 28, we get a useless set of nulls. */
1079                         bp = tmp_sum;
1080                 }
1081                 if (first_hlink_ndx >= flist->ndx_start) {
1082                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
1083                         memcpy(bp, F_SUM(first), checksum_len);
1084                 } else
1085                         read_buf(f, bp, checksum_len);
1086         }
1087
1088 #ifdef SUPPORT_ACLS
1089         if (preserve_acls && !S_ISLNK(mode))
1090                 receive_acl(file, f);
1091 #endif
1092 #ifdef SUPPORT_XATTRS
1093         if (preserve_xattrs)
1094                 receive_xattr(file, f );
1095 #endif
1096
1097         if (S_ISREG(mode) || S_ISLNK(mode))
1098                 stats.total_size += file_length;
1099
1100         return file;
1101 }
1102
1103 /* Create a file_struct for a named file by reading its stat() information
1104  * and performing extensive checks against global options.
1105  *
1106  * Returns a pointer to the new file struct, or NULL if there was an error
1107  * or this file should be excluded.
1108  *
1109  * Note: Any error (here or in send_file_name) that results in the omission of
1110  * an existent source file from the file list should set
1111  * "io_error |= IOERR_GENERAL" to avoid deletion of the file from the
1112  * destination if --delete is on. */
1113 struct file_struct *make_file(const char *fname, struct file_list *flist,
1114                               STRUCT_STAT *stp, int flags, int filter_level)
1115 {
1116         static char *lastdir;
1117         static int lastdir_len = -1;
1118         struct file_struct *file;
1119         char thisname[MAXPATHLEN];
1120         char linkname[MAXPATHLEN];
1121         int alloc_len, basename_len, linkname_len;
1122         int extra_len = file_extra_cnt * EXTRA_LEN;
1123         const char *basename;
1124         alloc_pool_t *pool;
1125         STRUCT_STAT st;
1126         char *bp;
1127
1128         if (strlcpy(thisname, fname, sizeof thisname) >= sizeof thisname) {
1129                 io_error |= IOERR_GENERAL;
1130                 rprintf(FERROR_XFER, "skipping overly long name: %s\n", fname);
1131                 return NULL;
1132         }
1133         clean_fname(thisname, 0);
1134         if (sanitize_paths)
1135                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
1136
1137         if (stp && (S_ISDIR(stp->st_mode) || stp->st_mode == 0)) {
1138                 /* This is needed to handle a "symlink/." with a --relative
1139                  * dir, or a request to delete a specific file. */
1140                 st = *stp;
1141                 *linkname = '\0'; /* make IBM code checker happy */
1142         } else if (readlink_stat(thisname, &st, linkname) != 0) {
1143                 int save_errno = errno;
1144                 /* See if file is excluded before reporting an error. */
1145                 if (filter_level != NO_FILTERS
1146                  && (is_excluded(thisname, 0, filter_level)
1147                   || is_excluded(thisname, 1, filter_level))) {
1148                         if (ignore_perishable && save_errno != ENOENT)
1149                                 non_perishable_cnt++;
1150                         return NULL;
1151                 }
1152                 if (save_errno == ENOENT) {
1153 #ifdef SUPPORT_LINKS
1154                         /* When our options tell us to follow a symlink that
1155                          * points nowhere, tell the user about the symlink
1156                          * instead of giving a "vanished" message.  We only
1157                          * dereference a symlink if one of the --copy*links
1158                          * options was specified, so there's no need for the
1159                          * extra lstat() if one of these options isn't on. */
1160                         if ((copy_links || copy_unsafe_links || copy_dirlinks)
1161                          && x_lstat(thisname, &st, NULL) == 0
1162                          && S_ISLNK(st.st_mode)) {
1163                                 io_error |= IOERR_GENERAL;
1164                                 rprintf(FERROR_XFER, "symlink has no referent: %s\n",
1165                                         full_fname(thisname));
1166                         } else
1167 #endif
1168                         {
1169                                 enum logcode c = am_daemon && protocol_version < 28
1170                                                ? FERROR : FWARNING;
1171                                 io_error |= IOERR_VANISHED;
1172                                 rprintf(c, "file has vanished: %s\n",
1173                                         full_fname(thisname));
1174                         }
1175                 } else {
1176                         io_error |= IOERR_GENERAL;
1177                         rsyserr(FERROR_XFER, save_errno, "readlink_stat(%s) failed",
1178                                 full_fname(thisname));
1179                 }
1180                 return NULL;
1181         } else if (st.st_mode == 0) {
1182                 io_error |= IOERR_GENERAL;
1183                 rprintf(FINFO, "skipping file with bogus (zero) st_mode: %s\n",
1184                         full_fname(thisname));
1185                 return NULL;
1186         }
1187
1188         if (filter_level == NO_FILTERS)
1189                 goto skip_filters;
1190
1191         if (S_ISDIR(st.st_mode)) {
1192                 if (!xfer_dirs) {
1193                         rprintf(FINFO, "skipping directory %s\n", thisname);
1194                         return NULL;
1195                 }
1196                 /* -x only affects dirs because we need to avoid recursing
1197                  * into a mount-point directory, not to avoid copying a
1198                  * symlinked file if -L (or similar) was specified. */
1199                 if (one_file_system && st.st_dev != filesystem_dev
1200                  && BITS_SETnUNSET(flags, FLAG_CONTENT_DIR, FLAG_TOP_DIR)) {
1201                         if (one_file_system > 1) {
1202                                 if (INFO_GTE(MOUNT, 1)) {
1203                                         rprintf(FINFO,
1204                                             "[%s] skipping mount-point dir %s\n",
1205                                             who_am_i(), thisname);
1206                                 }
1207                                 return NULL;
1208                         }
1209                         flags |= FLAG_MOUNT_DIR;
1210                         flags &= ~FLAG_CONTENT_DIR;
1211                 }
1212         } else
1213                 flags &= ~FLAG_CONTENT_DIR;
1214
1215         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level)) {
1216                 if (ignore_perishable)
1217                         non_perishable_cnt++;
1218                 return NULL;
1219         }
1220
1221         if (lp_ignore_nonreadable(module_id)) {
1222 #ifdef SUPPORT_LINKS
1223                 if (!S_ISLNK(st.st_mode))
1224 #endif
1225                         if (access(thisname, R_OK) != 0)
1226                                 return NULL;
1227         }
1228
1229   skip_filters:
1230
1231         /* Only divert a directory in the main transfer. */
1232         if (flist) {
1233                 if (flist->prev && S_ISDIR(st.st_mode)
1234                  && flags & FLAG_DIVERT_DIRS) {
1235                         /* Room for parent/sibling/next-child info. */
1236                         extra_len += DIRNODE_EXTRA_CNT * EXTRA_LEN;
1237                         if (relative_paths)
1238                                 extra_len += PTR_EXTRA_CNT * EXTRA_LEN;
1239                         pool = dir_flist->file_pool;
1240                 } else
1241                         pool = flist->file_pool;
1242         } else {
1243 #ifdef SUPPORT_ACLS
1244                 /* Directories need an extra int32 for the default ACL. */
1245                 if (preserve_acls && S_ISDIR(st.st_mode))
1246                         extra_len += EXTRA_LEN;
1247 #endif
1248                 pool = NULL;
1249         }
1250
1251         if (DEBUG_GTE(FLIST, 2)) {
1252                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
1253                         who_am_i(), thisname, filter_level);
1254         }
1255
1256         if ((basename = strrchr(thisname, '/')) != NULL) {
1257                 int len = basename++ - thisname;
1258                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
1259                         lastdir = new_array(char, len + 1);
1260                         memcpy(lastdir, thisname, len);
1261                         lastdir[len] = '\0';
1262                         lastdir_len = len;
1263                 }
1264         } else
1265                 basename = thisname;
1266         basename_len = strlen(basename) + 1; /* count the '\0' */
1267
1268 #ifdef SUPPORT_LINKS
1269         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
1270 #else
1271         linkname_len = 0;
1272 #endif
1273
1274 #if SIZEOF_CAPITAL_OFF_T >= 8
1275         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
1276                 extra_len += EXTRA_LEN;
1277 #endif
1278
1279         if (always_checksum && am_sender && S_ISREG(st.st_mode)) {
1280                 file_checksum(thisname, tmp_sum, st.st_size);
1281                 if (sender_keeps_checksum)
1282                         extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
1283         }
1284
1285 #if EXTRA_ROUNDING > 0
1286         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
1287                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
1288 #endif
1289
1290         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
1291                   + linkname_len;
1292         if (pool)
1293                 bp = pool_alloc(pool, alloc_len, "make_file");
1294         else {
1295                 if (!(bp = new_array(char, alloc_len)))
1296                         out_of_memory("make_file");
1297         }
1298
1299         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
1300         bp += extra_len;
1301         file = (struct file_struct *)bp;
1302         bp += FILE_STRUCT_LEN;
1303
1304         memcpy(bp, basename, basename_len);
1305
1306 #ifdef SUPPORT_HARD_LINKS
1307         if (preserve_hard_links && flist && flist->prev) {
1308                 if (protocol_version >= 28
1309                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
1310                  : S_ISREG(st.st_mode)) {
1311                         tmp_dev = (int64)st.st_dev + 1;
1312                         tmp_ino = (int64)st.st_ino;
1313                 } else
1314                         tmp_dev = 0;
1315         }
1316 #endif
1317
1318 #ifdef HAVE_STRUCT_STAT_ST_RDEV
1319         if (IS_DEVICE(st.st_mode)) {
1320                 tmp_rdev = st.st_rdev;
1321                 st.st_size = 0;
1322         } else if (IS_SPECIAL(st.st_mode))
1323                 st.st_size = 0;
1324 #endif
1325
1326         file->flags = flags;
1327         file->modtime = st.st_mtime;
1328         file->len32 = (uint32)st.st_size;
1329 #if SIZEOF_CAPITAL_OFF_T >= 8
1330         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
1331                 file->flags |= FLAG_LENGTH64;
1332                 OPT_EXTRA(file, 0)->unum = (uint32)(st.st_size >> 32);
1333         }
1334 #endif
1335         file->mode = st.st_mode;
1336         if (uid_ndx) /* Check uid_ndx instead of preserve_uid for del support */
1337                 F_OWNER(file) = st.st_uid;
1338         if (gid_ndx) /* Check gid_ndx instead of preserve_gid for del support */
1339                 F_GROUP(file) = st.st_gid;
1340
1341         if (basename != thisname)
1342                 file->dirname = lastdir;
1343
1344 #ifdef SUPPORT_LINKS
1345         if (linkname_len)
1346                 memcpy(bp + basename_len, linkname, linkname_len);
1347 #endif
1348
1349         if (am_sender)
1350                 F_PATHNAME(file) = pathname;
1351         else if (!pool)
1352                 F_DEPTH(file) = extra_len / EXTRA_LEN;
1353
1354         if (basename_len == 0+1) {
1355                 if (!pool)
1356                         unmake_file(file);
1357                 return NULL;
1358         }
1359
1360         if (sender_keeps_checksum && S_ISREG(st.st_mode))
1361                 memcpy(F_SUM(file), tmp_sum, checksum_len);
1362
1363         if (unsort_ndx)
1364                 F_NDX(file) = stats.num_dirs;
1365
1366         return file;
1367 }
1368
1369 /* Only called for temporary file_struct entries created by make_file(). */
1370 void unmake_file(struct file_struct *file)
1371 {
1372         free(REQ_EXTRA(file, F_DEPTH(file)));
1373 }
1374
1375 static struct file_struct *send_file_name(int f, struct file_list *flist,
1376                                           const char *fname, STRUCT_STAT *stp,
1377                                           int flags, int filter_level)
1378 {
1379         struct file_struct *file;
1380
1381         file = make_file(fname, flist, stp, flags, filter_level);
1382         if (!file)
1383                 return NULL;
1384
1385         if (chmod_modes && !S_ISLNK(file->mode) && file->mode)
1386                 file->mode = tweak_mode(file->mode, chmod_modes);
1387
1388         if (f >= 0) {
1389                 char fbuf[MAXPATHLEN];
1390 #ifdef SUPPORT_LINKS
1391                 const char *symlink_name;
1392                 int symlink_len;
1393 #ifdef ICONV_OPTION
1394                 char symlink_buf[MAXPATHLEN];
1395 #endif
1396 #endif
1397 #if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
1398                 stat_x sx;
1399                 init_stat_x(&sx);
1400 #endif
1401
1402 #ifdef SUPPORT_LINKS
1403                 if (preserve_links && S_ISLNK(file->mode)) {
1404                         symlink_name = F_SYMLINK(file);
1405                         symlink_len = strlen(symlink_name);
1406                         if (symlink_len == 0) {
1407                                 io_error |= IOERR_GENERAL;
1408                                 f_name(file, fbuf);
1409                                 rprintf(FERROR_XFER,
1410                                     "skipping symlink with 0-length value: %s\n",
1411                                     full_fname(fbuf));
1412                                 return NULL;
1413                         }
1414                 } else {
1415                         symlink_name = NULL;
1416                         symlink_len = 0;
1417                 }
1418 #endif
1419
1420 #ifdef ICONV_OPTION
1421                 if (ic_send != (iconv_t)-1) {
1422                         xbuf outbuf, inbuf;
1423
1424                         INIT_CONST_XBUF(outbuf, fbuf);
1425
1426                         if (file->dirname) {
1427                                 INIT_XBUF_STRLEN(inbuf, (char*)file->dirname);
1428                                 outbuf.size -= 2; /* Reserve room for '/' & 1 more char. */
1429                                 if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0)
1430                                         goto convert_error;
1431                                 outbuf.size += 2;
1432                                 fbuf[outbuf.len++] = '/';
1433                         }
1434
1435                         INIT_XBUF_STRLEN(inbuf, (char*)file->basename);
1436                         if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0) {
1437                           convert_error:
1438                                 io_error |= IOERR_GENERAL;
1439                                 rprintf(FERROR_XFER,
1440                                     "[%s] cannot convert filename: %s (%s)\n",
1441                                     who_am_i(), f_name(file, fbuf), strerror(errno));
1442                                 return NULL;
1443                         }
1444                         fbuf[outbuf.len] = '\0';
1445
1446 #ifdef SUPPORT_LINKS
1447                         if (symlink_len && sender_symlink_iconv) {
1448                                 INIT_XBUF(inbuf, (char*)symlink_name, symlink_len, (size_t)-1);
1449                                 INIT_CONST_XBUF(outbuf, symlink_buf);
1450                                 if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0) {
1451                                         io_error |= IOERR_GENERAL;
1452                                         f_name(file, fbuf);
1453                                         rprintf(FERROR_XFER,
1454                                             "[%s] cannot convert symlink data for: %s (%s)\n",
1455                                             who_am_i(), full_fname(fbuf), strerror(errno));
1456                                         return NULL;
1457                                 }
1458                                 symlink_buf[outbuf.len] = '\0';
1459
1460                                 symlink_name = symlink_buf;
1461                                 symlink_len = outbuf.len;
1462                         }
1463 #endif
1464                 } else
1465 #endif
1466                         f_name(file, fbuf);
1467
1468 #ifdef SUPPORT_ACLS
1469                 if (preserve_acls && !S_ISLNK(file->mode)) {
1470                         sx.st.st_mode = file->mode;
1471                         if (get_acl(fname, &sx) < 0) {
1472                                 io_error |= IOERR_GENERAL;
1473                                 return NULL;
1474                         }
1475                 }
1476 #endif
1477 #ifdef SUPPORT_XATTRS
1478                 if (preserve_xattrs) {
1479                         if (get_xattr(fname, &sx) < 0) {
1480                                 io_error |= IOERR_GENERAL;
1481                                 return NULL;
1482                         }
1483                 }
1484 #endif
1485
1486                 send_file_entry(f, fbuf, file,
1487 #ifdef SUPPORT_LINKS
1488                                 symlink_name, symlink_len,
1489 #endif
1490                                 flist->used, flist->ndx_start);
1491
1492 #ifdef SUPPORT_ACLS
1493                 if (preserve_acls && !S_ISLNK(file->mode)) {
1494                         send_acl(&sx, f);
1495                         free_acl(&sx);
1496                 }
1497 #endif
1498 #ifdef SUPPORT_XATTRS
1499                 if (preserve_xattrs) {
1500                         F_XATTR(file) = send_xattr(&sx, f);
1501                         free_xattr(&sx);
1502                 }
1503 #endif
1504         }
1505
1506         maybe_emit_filelist_progress(flist->used + flist_count_offset);
1507
1508         flist_expand(flist, 1);
1509         flist->files[flist->used++] = file;
1510
1511         return file;
1512 }
1513
1514 static void send_if_directory(int f, struct file_list *flist,
1515                               struct file_struct *file,
1516                               char *fbuf, unsigned int ol,
1517                               int flags)
1518 {
1519         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1520
1521         if (S_ISDIR(file->mode)
1522             && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) {
1523                 void *save_filters;
1524                 unsigned int len = strlen(fbuf);
1525                 if (len > 1 && fbuf[len-1] == '/')
1526                         fbuf[--len] = '\0';
1527                 if (len >= MAXPATHLEN - 1) {
1528                         io_error |= IOERR_GENERAL;
1529                         rprintf(FERROR_XFER, "skipping long-named directory: %s\n",
1530                                 full_fname(fbuf));
1531                         return;
1532                 }
1533                 save_filters = push_local_filters(fbuf, len);
1534                 send_directory(f, flist, fbuf, len, flags);
1535                 pop_local_filters(save_filters);
1536                 fbuf[ol] = '\0';
1537                 if (is_dot_dir)
1538                         fbuf[ol-1] = '.';
1539         }
1540 }
1541
1542 static int file_compare(const void *file1, const void *file2)
1543 {
1544         return f_name_cmp(*(struct file_struct **)file1,
1545                           *(struct file_struct **)file2);
1546 }
1547
1548 /* The guts of a merge-sort algorithm.  This was derived from the glibc
1549  * version, but I (Wayne) changed the merge code to do less copying and
1550  * to require only half the amount of temporary memory. */
1551 static void fsort_tmp(struct file_struct **fp, size_t num,
1552                       struct file_struct **tmp)
1553 {
1554         struct file_struct **f1, **f2, **t;
1555         size_t n1, n2;
1556
1557         n1 = num / 2;
1558         n2 = num - n1;
1559         f1 = fp;
1560         f2 = fp + n1;
1561
1562         if (n1 > 1)
1563                 fsort_tmp(f1, n1, tmp);
1564         if (n2 > 1)
1565                 fsort_tmp(f2, n2, tmp);
1566
1567         while (f_name_cmp(*f1, *f2) <= 0) {
1568                 if (!--n1)
1569                         return;
1570                 f1++;
1571         }
1572
1573         t = tmp;
1574         memcpy(t, f1, n1 * PTR_SIZE);
1575
1576         *f1++ = *f2++, n2--;
1577
1578         while (n1 > 0 && n2 > 0) {
1579                 if (f_name_cmp(*t, *f2) <= 0)
1580                         *f1++ = *t++, n1--;
1581                 else
1582                         *f1++ = *f2++, n2--;
1583         }
1584
1585         if (n1 > 0)
1586                 memcpy(f1, t, n1 * PTR_SIZE);
1587 }
1588
1589 /* This file-struct sorting routine makes sure that any identical names in
1590  * the file list stay in the same order as they were in the original list.
1591  * This is particularly vital in inc_recurse mode where we expect a sort
1592  * on the flist to match the exact order of a sort on the dir_flist. */
1593 static void fsort(struct file_struct **fp, size_t num)
1594 {
1595         if (num <= 1)
1596                 return;
1597
1598         if (use_qsort)
1599                 qsort(fp, num, PTR_SIZE, file_compare);
1600         else {
1601                 struct file_struct **tmp = new_array(struct file_struct *,
1602                                                      (num+1) / 2);
1603                 fsort_tmp(fp, num, tmp);
1604                 free(tmp);
1605         }
1606 }
1607
1608 /* We take an entire set of sibling dirs from the sorted flist and link them
1609  * into the tree, setting the appropriate parent/child/sibling pointers. */
1610 static void add_dirs_to_tree(int parent_ndx, struct file_list *from_flist,
1611                              int dir_cnt)
1612 {
1613         int i;
1614         int32 *dp = NULL;
1615         int32 *parent_dp = parent_ndx < 0 ? NULL
1616                          : F_DIR_NODE_P(dir_flist->sorted[parent_ndx]);
1617
1618         flist_expand(dir_flist, dir_cnt);
1619         dir_flist->sorted = dir_flist->files;
1620
1621         for (i = 0; dir_cnt; i++) {
1622                 struct file_struct *file = from_flist->sorted[i];
1623
1624                 if (!S_ISDIR(file->mode))
1625                         continue;
1626
1627                 dir_flist->files[dir_flist->used++] = file;
1628                 dir_cnt--;
1629
1630                 if (file->basename[0] == '.' && file->basename[1] == '\0')
1631                         continue;
1632
1633                 if (dp)
1634                         DIR_NEXT_SIBLING(dp) = dir_flist->used - 1;
1635                 else if (parent_dp)
1636                         DIR_FIRST_CHILD(parent_dp) = dir_flist->used - 1;
1637                 else
1638                         send_dir_ndx = dir_flist->used - 1;
1639
1640                 dp = F_DIR_NODE_P(file);
1641                 DIR_PARENT(dp) = parent_ndx;
1642                 DIR_FIRST_CHILD(dp) = -1;
1643         }
1644         if (dp)
1645                 DIR_NEXT_SIBLING(dp) = -1;
1646 }
1647
1648 static void interpret_stat_error(const char *fname, int is_dir)
1649 {
1650         if (errno == ENOENT) {
1651                 io_error |= IOERR_VANISHED;
1652                 rprintf(FWARNING, "%s has vanished: %s\n",
1653                         is_dir ? "directory" : "file", full_fname(fname));
1654         } else {
1655                 io_error |= IOERR_GENERAL;
1656                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1657                         full_fname(fname));
1658         }
1659 }
1660
1661 /* This function is normally called by the sender, but the receiving side also
1662  * calls it from get_dirlist() with f set to -1 so that we just construct the
1663  * file list in memory without sending it over the wire.  Also, get_dirlist()
1664  * might call this with f set to -2, which also indicates that local filter
1665  * rules should be ignored. */
1666 static void send_directory(int f, struct file_list *flist, char *fbuf, int len,
1667                            int flags)
1668 {
1669         struct dirent *di;
1670         unsigned remainder;
1671         char *p;
1672         DIR *d;
1673         int divert_dirs = (flags & FLAG_DIVERT_DIRS) != 0;
1674         int start = flist->used;
1675         int filter_level = f == -2 ? SERVER_FILTERS : ALL_FILTERS;
1676
1677         assert(flist != NULL);
1678
1679         if (!(d = opendir(fbuf))) {
1680                 if (errno == ENOENT) {
1681                         if (am_sender) /* Can abuse this for vanished error w/ENOENT: */
1682                                 interpret_stat_error(fbuf, True);
1683                         return;
1684                 }
1685                 io_error |= IOERR_GENERAL;
1686                 rsyserr(FERROR_XFER, errno, "opendir %s failed", full_fname(fbuf));
1687                 return;
1688         }
1689
1690         p = fbuf + len;
1691         if (len != 1 || *fbuf != '/')
1692                 *p++ = '/';
1693         *p = '\0';
1694         remainder = MAXPATHLEN - (p - fbuf);
1695
1696         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1697                 char *dname = d_name(di);
1698                 if (dname[0] == '.' && (dname[1] == '\0'
1699                     || (dname[1] == '.' && dname[2] == '\0')))
1700                         continue;
1701                 if (strlcpy(p, dname, remainder) >= remainder) {
1702                         io_error |= IOERR_GENERAL;
1703                         rprintf(FERROR_XFER,
1704                                 "cannot send long-named file %s\n",
1705                                 full_fname(fbuf));
1706                         continue;
1707                 }
1708                 if (dname[0] == '\0') {
1709                         io_error |= IOERR_GENERAL;
1710                         rprintf(FERROR_XFER,
1711                                 "cannot send file with empty name in %s\n",
1712                                 full_fname(fbuf));
1713                         continue;
1714                 }
1715
1716                 send_file_name(f, flist, fbuf, NULL, flags, filter_level);
1717         }
1718
1719         fbuf[len] = '\0';
1720
1721         if (errno) {
1722                 io_error |= IOERR_GENERAL;
1723                 rsyserr(FERROR_XFER, errno, "readdir(%s)", full_fname(fbuf));
1724         }
1725
1726         closedir(d);
1727
1728         if (f >= 0 && recurse && !divert_dirs) {
1729                 int i, end = flist->used - 1;
1730                 /* send_if_directory() bumps flist->used, so use "end". */
1731                 for (i = start; i <= end; i++)
1732                         send_if_directory(f, flist, flist->files[i], fbuf, len, flags);
1733         }
1734 }
1735
1736 static void send_implied_dirs(int f, struct file_list *flist, char *fname,
1737                               char *start, char *limit, int flags, char name_type)
1738 {
1739         static char lastpath[MAXPATHLEN] = "";
1740         static int lastpath_len = 0;
1741         static struct file_struct *lastpath_struct = NULL;
1742         struct file_struct *file;
1743         item_list *relname_list;
1744         relnamecache **rnpp;
1745         int len, need_new_dir, depth = 0;
1746         filter_rule_list save_filter_list = filter_list;
1747
1748         flags = (flags | FLAG_IMPLIED_DIR) & ~(FLAG_TOP_DIR | FLAG_CONTENT_DIR);
1749         filter_list.head = filter_list.tail = NULL; /* Don't filter implied dirs. */
1750
1751         if (inc_recurse) {
1752                 if (lastpath_struct && F_PATHNAME(lastpath_struct) == pathname
1753                  && lastpath_len == limit - fname
1754                  && strncmp(lastpath, fname, lastpath_len) == 0)
1755                         need_new_dir = 0;
1756                 else
1757                         need_new_dir = 1;
1758         } else {
1759                 char *tp = fname, *lp = lastpath;
1760                 /* Skip any initial directories in our path that we
1761                  * have in common with lastpath. */
1762                 assert(start == fname);
1763                 for ( ; ; tp++, lp++) {
1764                         if (tp == limit) {
1765                                 if (*lp == '/' || *lp == '\0')
1766                                         goto done;
1767                                 break;
1768                         }
1769                         if (*lp != *tp)
1770                                 break;
1771                         if (*tp == '/') {
1772                                 start = tp;
1773                                 depth++;
1774                         }
1775                 }
1776                 need_new_dir = 1;
1777         }
1778
1779         if (need_new_dir) {
1780                 int save_copy_links = copy_links;
1781                 int save_xfer_dirs = xfer_dirs;
1782                 char *slash;
1783
1784                 copy_links = xfer_dirs = 1;
1785
1786                 *limit = '\0';
1787
1788                 for (slash = start; (slash = strchr(slash+1, '/')) != NULL; ) {
1789                         *slash = '\0';
1790                         file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1791                         depth++;
1792                         if (!inc_recurse && file && S_ISDIR(file->mode))
1793                                 change_local_filter_dir(fname, strlen(fname), depth);
1794                         *slash = '/';
1795                 }
1796
1797                 file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1798                 if (inc_recurse) {
1799                         if (file && !S_ISDIR(file->mode))
1800                                 file = NULL;
1801                         lastpath_struct = file;
1802                 } else if (file && S_ISDIR(file->mode))
1803                         change_local_filter_dir(fname, strlen(fname), ++depth);
1804
1805                 strlcpy(lastpath, fname, sizeof lastpath);
1806                 lastpath_len = limit - fname;
1807
1808                 *limit = '/';
1809
1810                 copy_links = save_copy_links;
1811                 xfer_dirs = save_xfer_dirs;
1812
1813                 if (!inc_recurse)
1814                         goto done;
1815         }
1816
1817         if (!lastpath_struct)
1818                 goto done; /* dir must have vanished */
1819
1820         len = strlen(limit+1);
1821         memcpy(&relname_list, F_DIR_RELNAMES_P(lastpath_struct), sizeof relname_list);
1822         if (!relname_list) {
1823                 if (!(relname_list = new0(item_list)))
1824                         out_of_memory("send_implied_dirs");
1825                 memcpy(F_DIR_RELNAMES_P(lastpath_struct), &relname_list, sizeof relname_list);
1826         }
1827         rnpp = EXPAND_ITEM_LIST(relname_list, relnamecache *, 32);
1828         if (!(*rnpp = (relnamecache*)new_array(char, sizeof (relnamecache) + len)))
1829                 out_of_memory("send_implied_dirs");
1830         (*rnpp)->name_type = name_type;
1831         strlcpy((*rnpp)->fname, limit+1, len + 1);
1832
1833 done:
1834         filter_list = save_filter_list;
1835 }
1836
1837 static void send1extra(int f, struct file_struct *file, struct file_list *flist)
1838 {
1839         char fbuf[MAXPATHLEN];
1840         item_list *relname_list;
1841         int len, dlen, flags = FLAG_DIVERT_DIRS | FLAG_CONTENT_DIR;
1842         size_t j;
1843
1844         f_name(file, fbuf);
1845         dlen = strlen(fbuf);
1846
1847         if (!change_pathname(file, NULL, 0))
1848                 exit_cleanup(RERR_FILESELECT);
1849
1850         change_local_filter_dir(fbuf, dlen, send_dir_depth);
1851
1852         if (file->flags & FLAG_CONTENT_DIR) {
1853                 if (one_file_system) {
1854                         STRUCT_STAT st;
1855                         if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1856                                 interpret_stat_error(fbuf, True);
1857                                 return;
1858                         }
1859                         filesystem_dev = st.st_dev;
1860                 }
1861                 send_directory(f, flist, fbuf, dlen, flags);
1862         }
1863
1864         if (!relative_paths)
1865                 return;
1866
1867         memcpy(&relname_list, F_DIR_RELNAMES_P(file), sizeof relname_list);
1868         if (!relname_list)
1869                 return;
1870
1871         for (j = 0; j < relname_list->count; j++) {
1872                 char *slash;
1873                 relnamecache *rnp = ((relnamecache**)relname_list->items)[j];
1874                 char name_type = rnp->name_type;
1875
1876                 fbuf[dlen] = '/';
1877                 len = strlcpy(fbuf + dlen + 1, rnp->fname, sizeof fbuf - dlen - 1);
1878                 free(rnp);
1879                 if (len >= (int)sizeof fbuf)
1880                         continue; /* Impossible... */
1881
1882                 slash = strchr(fbuf+dlen+1, '/');
1883                 if (slash) {
1884                         send_implied_dirs(f, flist, fbuf, fbuf+dlen+1, slash, flags, name_type);
1885                         continue;
1886                 }
1887
1888                 if (name_type != NORMAL_NAME) {
1889                         STRUCT_STAT st;
1890                         if (link_stat(fbuf, &st, 1) != 0) {
1891                                 interpret_stat_error(fbuf, True);
1892                                 continue;
1893                         }
1894                         send_file_name(f, flist, fbuf, &st, FLAG_TOP_DIR | flags, ALL_FILTERS);
1895                 } else
1896                         send_file_name(f, flist, fbuf, NULL, FLAG_TOP_DIR | flags, ALL_FILTERS);
1897         }
1898
1899         free(relname_list);
1900 }
1901
1902 void send_extra_file_list(int f, int at_least)
1903 {
1904         struct file_list *flist;
1905         int64 start_write;
1906         uint16 prev_flags;
1907         int old_cnt, save_io_error = io_error;
1908
1909         if (flist_eof)
1910                 return;
1911
1912         /* Keep sending data until we have the requested number of
1913          * files in the upcoming file-lists. */
1914         old_cnt = cur_flist->used;
1915         for (flist = first_flist; flist != cur_flist; flist = flist->next)
1916                 old_cnt += flist->used;
1917         while (file_total - old_cnt < at_least) {
1918                 struct file_struct *file = dir_flist->sorted[send_dir_ndx];
1919                 int dir_ndx, dstart = stats.num_dirs;
1920                 const char *pathname = F_PATHNAME(file);
1921                 int32 *dp;
1922
1923                 flist = flist_new(0, "send_extra_file_list");
1924                 start_write = stats.total_written;
1925
1926                 if (unsort_ndx)
1927                         dir_ndx = F_NDX(file);
1928                 else
1929                         dir_ndx = send_dir_ndx;
1930                 write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
1931                 flist->parent_ndx = dir_ndx;
1932
1933                 send1extra(f, file, flist);
1934                 prev_flags = file->flags;
1935                 dp = F_DIR_NODE_P(file);
1936
1937                 /* If there are any duplicate directory names that follow, we
1938                  * send all the dirs together in one file-list.  The dir_flist
1939                  * tree links all the child subdirs onto the last dup dir. */
1940                 while ((dir_ndx = DIR_NEXT_SIBLING(dp)) >= 0
1941                     && dir_flist->sorted[dir_ndx]->flags & FLAG_DUPLICATE) {
1942                         send_dir_ndx = dir_ndx;
1943                         file = dir_flist->sorted[dir_ndx];
1944                         /* Try to avoid some duplicate scanning of identical dirs. */
1945                         if (F_PATHNAME(file) == pathname && prev_flags & FLAG_CONTENT_DIR)
1946                                 file->flags &= ~FLAG_CONTENT_DIR;
1947                         send1extra(f, file, flist);
1948                         prev_flags = file->flags;
1949                         dp = F_DIR_NODE_P(file);
1950                 }
1951
1952                 if (protocol_version < 31 || io_error == save_io_error || ignore_errors)
1953                         write_byte(f, 0);
1954                 else {
1955                         write_shortint(f, XMIT_EXTENDED_FLAGS|XMIT_IO_ERROR_ENDLIST);
1956                         write_varint(f, io_error);
1957                 }
1958
1959                 if (need_unsorted_flist) {
1960                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
1961                                 out_of_memory("send_extra_file_list");
1962                         memcpy(flist->sorted, flist->files,
1963                                flist->used * sizeof (struct file_struct*));
1964                 } else
1965                         flist->sorted = flist->files;
1966
1967                 flist_sort_and_clean(flist, 0);
1968
1969                 add_dirs_to_tree(send_dir_ndx, flist, stats.num_dirs - dstart);
1970                 flist_done_allocating(flist);
1971
1972                 file_total += flist->used;
1973                 stats.flist_size += stats.total_written - start_write;
1974                 stats.num_files += flist->used;
1975                 if (DEBUG_GTE(FLIST, 3))
1976                         output_flist(flist);
1977
1978                 if (DIR_FIRST_CHILD(dp) >= 0) {
1979                         send_dir_ndx = DIR_FIRST_CHILD(dp);
1980                         send_dir_depth++;
1981                 } else {
1982                         while (DIR_NEXT_SIBLING(dp) < 0) {
1983                                 if ((send_dir_ndx = DIR_PARENT(dp)) < 0) {
1984                                         write_ndx(f, NDX_FLIST_EOF);
1985                                         flist_eof = 1;
1986                                         change_local_filter_dir(NULL, 0, 0);
1987                                         goto finish;
1988                                 }
1989                                 send_dir_depth--;
1990                                 file = dir_flist->sorted[send_dir_ndx];
1991                                 dp = F_DIR_NODE_P(file);
1992                         }
1993                         send_dir_ndx = DIR_NEXT_SIBLING(dp);
1994                 }
1995         }
1996
1997   finish:
1998         if (io_error != save_io_error && protocol_version == 30 && !ignore_errors)
1999                 send_msg_int(MSG_IO_ERROR, io_error);
2000 }
2001
2002 struct file_list *send_file_list(int f, int argc, char *argv[])
2003 {
2004         static const char *lastdir;
2005         static int lastdir_len = -1;
2006         int len, dirlen;
2007         STRUCT_STAT st;
2008         char *p, *dir;
2009         struct file_list *flist;
2010         struct timeval start_tv, end_tv;
2011         int64 start_write;
2012         int use_ff_fd = 0;
2013         int disable_buffering;
2014         int flags = recurse ? FLAG_CONTENT_DIR : 0;
2015         int reading_remotely = filesfrom_host != NULL;
2016         int rl_flags = (reading_remotely ? 0 : RL_DUMP_COMMENTS)
2017 #ifdef ICONV_OPTION
2018                      | (filesfrom_convert ? RL_CONVERT : 0)
2019 #endif
2020                      | (eol_nulls || reading_remotely ? RL_EOL_NULLS : 0);
2021         int implied_dot_dir = 0;
2022
2023         rprintf(FLOG, "building file list\n");
2024         if (show_filelist_p())
2025                 start_filelist_progress("building file list");
2026         else if (inc_recurse && INFO_GTE(FLIST, 1) && !am_server)
2027                 rprintf(FCLIENT, "sending incremental file list\n");
2028
2029         start_write = stats.total_written;
2030         gettimeofday(&start_tv, NULL);
2031
2032         if (relative_paths && protocol_version >= 30)
2033                 implied_dirs = 1; /* We send flagged implied dirs */
2034
2035 #ifdef SUPPORT_HARD_LINKS
2036         if (preserve_hard_links && protocol_version >= 30 && !cur_flist)
2037                 init_hard_links();
2038 #endif
2039
2040         flist = cur_flist = flist_new(0, "send_file_list");
2041         if (inc_recurse) {
2042                 dir_flist = flist_new(FLIST_TEMP, "send_file_list");
2043                 flags |= FLAG_DIVERT_DIRS;
2044         } else
2045                 dir_flist = cur_flist;
2046
2047         disable_buffering = io_start_buffering_out(f);
2048         if (filesfrom_fd >= 0) {
2049                 if (argv[0] && !change_dir(argv[0], CD_NORMAL)) {
2050                         rsyserr(FERROR_XFER, errno, "change_dir %s failed",
2051                                 full_fname(argv[0]));
2052                         exit_cleanup(RERR_FILESELECT);
2053                 }
2054                 use_ff_fd = 1;
2055         }
2056
2057         if (!orig_dir)
2058                 orig_dir = strdup(curr_dir);
2059
2060         while (1) {
2061                 char fbuf[MAXPATHLEN], *fn, name_type;
2062
2063                 if (use_ff_fd) {
2064                         if (read_line(filesfrom_fd, fbuf, sizeof fbuf, rl_flags) == 0)
2065                                 break;
2066                         sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
2067                 } else {
2068                         if (argc-- == 0)
2069                                 break;
2070                         strlcpy(fbuf, *argv++, MAXPATHLEN);
2071                         if (sanitize_paths)
2072                                 sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
2073                 }
2074
2075                 len = strlen(fbuf);
2076                 if (relative_paths) {
2077                         /* We clean up fbuf below. */
2078                         name_type = NORMAL_NAME;
2079                 } else if (!len || fbuf[len - 1] == '/') {
2080                         if (len == 2 && fbuf[0] == '.') {
2081                                 /* Turn "./" into just "." rather than "./." */
2082                                 fbuf[--len] = '\0';
2083                         } else {
2084                                 if (len + 1 >= MAXPATHLEN)
2085                                         overflow_exit("send_file_list");
2086                                 fbuf[len++] = '.';
2087                                 fbuf[len] = '\0';
2088                         }
2089                         name_type = DOTDIR_NAME;
2090                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
2091                     && (len == 2 || fbuf[len-3] == '/')) {
2092                         if (len + 2 >= MAXPATHLEN)
2093                                 overflow_exit("send_file_list");
2094                         fbuf[len++] = '/';
2095                         fbuf[len++] = '.';
2096                         fbuf[len] = '\0';
2097                         name_type = DOTDIR_NAME;
2098                 } else if (fbuf[len-1] == '.' && (len == 1 || fbuf[len-2] == '/'))
2099                         name_type = DOTDIR_NAME;
2100                 else
2101                         name_type = NORMAL_NAME;
2102
2103                 dir = NULL;
2104
2105                 if (!relative_paths) {
2106                         p = strrchr(fbuf, '/');
2107                         if (p) {
2108                                 *p = '\0';
2109                                 if (p == fbuf)
2110                                         dir = "/";
2111                                 else
2112                                         dir = fbuf;
2113                                 len -= p - fbuf + 1;
2114                                 fn = p + 1;
2115                         } else
2116                                 fn = fbuf;
2117                 } else {
2118                         if ((p = strstr(fbuf, "/./")) != NULL) {
2119                                 *p = '\0';
2120                                 if (p == fbuf)
2121                                         dir = "/";
2122                                 else {
2123                                         dir = fbuf;
2124                                         clean_fname(dir, 0);
2125                                 }
2126                                 fn = p + 3;
2127                                 while (*fn == '/')
2128                                         fn++;
2129                                 if (!*fn)
2130                                         *--fn = '\0'; /* ensure room for '.' */
2131                         } else
2132                                 fn = fbuf;
2133                         /* A leading ./ can be used in relative mode to affect
2134                          * the dest dir without its name being in the path. */
2135                         if (*fn == '.' && fn[1] == '/' && !implied_dot_dir) {
2136                                 send_file_name(f, flist, ".", NULL,
2137                                     (flags | FLAG_IMPLIED_DIR) & ~FLAG_CONTENT_DIR,
2138                                     ALL_FILTERS);
2139                                 implied_dot_dir = 1;
2140                         }
2141                         len = clean_fname(fn, CFN_KEEP_TRAILING_SLASH
2142                                             | CFN_DROP_TRAILING_DOT_DIR);
2143                         if (len == 1) {
2144                                 if (fn[0] == '/') {
2145                                         fn = "/.";
2146                                         len = 2;
2147                                         name_type = DOTDIR_NAME;
2148                                 } else if (fn[0] == '.')
2149                                         name_type = DOTDIR_NAME;
2150                         } else if (fn[len-1] == '/') {
2151                                 fn[--len] = '\0';
2152                                 if (len == 1 && *fn == '.')
2153                                         name_type = DOTDIR_NAME;
2154                                 else
2155                                         name_type = SLASH_ENDING_NAME;
2156                         }
2157                         /* Reject a ".." dir in the active part of the path. */
2158                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
2159                                 if ((p[2] == '/' || p[2] == '\0')
2160                                  && (p == fn || p[-1] == '/')) {
2161                                         rprintf(FERROR,
2162                                             "found \"..\" dir in relative path: %s\n",
2163                                             fn);
2164                                         exit_cleanup(RERR_SYNTAX);
2165                                 }
2166                         }
2167                 }
2168
2169                 if (!*fn) {
2170                         len = 1;
2171                         fn = ".";
2172                         name_type = DOTDIR_NAME;
2173                 }
2174
2175                 dirlen = dir ? strlen(dir) : 0;
2176                 if (dirlen != lastdir_len || memcmp(lastdir, dir, dirlen) != 0) {
2177                         if (!change_pathname(NULL, dir, -dirlen))
2178                                 continue;
2179                         lastdir = pathname;
2180                         lastdir_len = pathname_len;
2181                 } else if (!change_pathname(NULL, lastdir, lastdir_len))
2182                         continue;
2183
2184                 if (fn != fbuf)
2185                         memmove(fbuf, fn, len + 1);
2186
2187                 if (link_stat(fbuf, &st, copy_dirlinks || name_type != NORMAL_NAME) != 0
2188                  || (name_type != DOTDIR_NAME && is_daemon_excluded(fbuf, S_ISDIR(st.st_mode)))
2189                  || (relative_paths && path_is_daemon_excluded(fbuf, 1))) {
2190                         if (errno != ENOENT || missing_args == 0) {
2191                                 /* This is a transfer error, but inhibit deletion
2192                                  * only if we might be omitting an existing file. */
2193                                 if (errno != ENOENT)
2194                                         io_error |= IOERR_GENERAL;
2195                                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
2196                                         full_fname(fbuf));
2197                                 continue;
2198                         } else if (missing_args == 1) {
2199                                 /* Just ignore the arg. */
2200                                 continue;
2201                         } else /* (missing_args == 2) */ {
2202                                 /* Send the arg as a "missing" entry with
2203                                  * mode 0, which tells the generator to delete it. */
2204                                 memset(&st, 0, sizeof st);
2205                         }
2206                 }
2207
2208                 /* A dot-dir should not be excluded! */
2209                 if (name_type != DOTDIR_NAME && st.st_mode != 0
2210                  && is_excluded(fbuf, S_ISDIR(st.st_mode) != 0, ALL_FILTERS))
2211                         continue;
2212
2213                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
2214                         rprintf(FINFO, "skipping directory %s\n", fbuf);
2215                         continue;
2216                 }
2217
2218                 if (inc_recurse && relative_paths && *fbuf) {
2219                         if ((p = strchr(fbuf+1, '/')) != NULL) {
2220                                 if (p - fbuf == 1 && *fbuf == '.') {
2221                                         if ((fn = strchr(p+1, '/')) != NULL)
2222                                                 p = fn;
2223                                 } else
2224                                         fn = p;
2225                                 send_implied_dirs(f, flist, fbuf, fbuf, p, flags, name_type);
2226                                 if (fn == p)
2227                                         continue;
2228                         }
2229                 } else if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
2230                         /* Send the implied directories at the start of the
2231                          * source spec, so we get their permissions right. */
2232                         send_implied_dirs(f, flist, fbuf, fbuf, p, flags, 0);
2233                 }
2234
2235                 if (one_file_system)
2236                         filesystem_dev = st.st_dev;
2237
2238                 if (recurse || (xfer_dirs && name_type != NORMAL_NAME)) {
2239                         struct file_struct *file;
2240                         file = send_file_name(f, flist, fbuf, &st,
2241                                               FLAG_TOP_DIR | FLAG_CONTENT_DIR | flags,
2242                                               NO_FILTERS);
2243                         if (!file)
2244                                 continue;
2245                         if (inc_recurse) {
2246                                 if (name_type == DOTDIR_NAME) {
2247                                         if (send_dir_depth < 0) {
2248                                                 send_dir_depth = 0;
2249                                                 change_local_filter_dir(fbuf, len, send_dir_depth);
2250                                         }
2251                                         send_directory(f, flist, fbuf, len, flags);
2252                                 }
2253                         } else
2254                                 send_if_directory(f, flist, file, fbuf, len, flags);
2255                 } else
2256                         send_file_name(f, flist, fbuf, &st, flags, NO_FILTERS);
2257         }
2258
2259         gettimeofday(&end_tv, NULL);
2260         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2261                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2262         if (stats.flist_buildtime == 0)
2263                 stats.flist_buildtime = 1;
2264         start_tv = end_tv;
2265
2266         /* Indicate end of file list */
2267         if (protocol_version < 31 || io_error == 0 || ignore_errors)
2268                 write_byte(f, 0);
2269         else {
2270                 write_shortint(f, XMIT_EXTENDED_FLAGS|XMIT_IO_ERROR_ENDLIST);
2271                 write_varint(f, io_error);
2272         }
2273
2274 #ifdef SUPPORT_HARD_LINKS
2275         if (preserve_hard_links && protocol_version >= 30 && !inc_recurse)
2276                 idev_destroy();
2277 #endif
2278
2279         if (show_filelist_p())
2280                 finish_filelist_progress(flist);
2281
2282         gettimeofday(&end_tv, NULL);
2283         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2284                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2285
2286         /* When converting names, both sides keep an unsorted file-list array
2287          * because the names will differ on the sending and receiving sides
2288          * (both sides will use the unsorted index number for each item). */
2289
2290         /* Sort the list without removing any duplicates.  This allows the
2291          * receiving side to ask for whatever name it kept.  For incremental
2292          * recursion mode, the sender marks duplicate dirs so that it can
2293          * send them together in a single file-list. */
2294         if (need_unsorted_flist) {
2295                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2296                         out_of_memory("send_file_list");
2297                 memcpy(flist->sorted, flist->files,
2298                        flist->used * sizeof (struct file_struct*));
2299         } else
2300                 flist->sorted = flist->files;
2301         flist_sort_and_clean(flist, 0);
2302         file_total += flist->used;
2303
2304         if (numeric_ids <= 0 && !inc_recurse)
2305                 send_id_list(f);
2306
2307         set_msg_fd_in(-1);
2308
2309         /* send the io_error flag */
2310         if (protocol_version < 30)
2311                 write_int(f, ignore_errors ? 0 : io_error);
2312         else if (io_error && protocol_version == 30 && !ignore_errors)
2313                 send_msg_int(MSG_IO_ERROR, io_error);
2314
2315         if (disable_buffering)
2316                 io_end_buffering_out();
2317
2318         stats.flist_size = stats.total_written - start_write;
2319         stats.num_files = flist->used;
2320
2321         if (DEBUG_GTE(FLIST, 3))
2322                 output_flist(flist);
2323
2324         if (DEBUG_GTE(FLIST, 2))
2325                 rprintf(FINFO, "send_file_list done\n");
2326
2327         if (inc_recurse) {
2328                 send_dir_depth = 1;
2329                 add_dirs_to_tree(-1, flist, stats.num_dirs);
2330                 if (!file_total || strcmp(flist->sorted[flist->low]->basename, ".") != 0)
2331                         flist->parent_ndx = -1;
2332                 flist_done_allocating(flist);
2333                 if (send_dir_ndx < 0) {
2334                         write_ndx(f, NDX_FLIST_EOF);
2335                         flist_eof = 1;
2336                 }
2337                 else if (file_total == 1) {
2338                         /* If we're creating incremental file-lists and there
2339                          * was just 1 item in the first file-list, send 1 more
2340                          * file-list to check if this is a 1-file xfer. */
2341                         send_extra_file_list(f, 1);
2342                 }
2343         } else
2344                 flist_eof = 1;
2345
2346         return flist;
2347 }
2348
2349 struct file_list *recv_file_list(int f)
2350 {
2351         struct file_list *flist;
2352         int dstart, flags;
2353         int64 start_read;
2354
2355         if (!first_flist) {
2356                 if (show_filelist_p())
2357                         start_filelist_progress("receiving file list");
2358                 else if (inc_recurse && INFO_GTE(FLIST, 1) && !am_server)
2359                         rprintf(FCLIENT, "receiving incremental file list\n");
2360                 rprintf(FLOG, "receiving file list\n");
2361                 if (usermap)
2362                         parse_name_map(usermap, True);
2363                 if (groupmap)
2364                         parse_name_map(groupmap, False);
2365         }
2366
2367         start_read = stats.total_read;
2368
2369 #ifdef SUPPORT_HARD_LINKS
2370         if (preserve_hard_links && !first_flist)
2371                 init_hard_links();
2372 #endif
2373
2374         flist = flist_new(0, "recv_file_list");
2375
2376         if (inc_recurse) {
2377                 if (flist->ndx_start == 1)
2378                         dir_flist = flist_new(FLIST_TEMP, "recv_file_list");
2379                 dstart = dir_flist->used;
2380         } else {
2381                 dir_flist = flist;
2382                 dstart = 0;
2383         }
2384
2385         while ((flags = read_byte(f)) != 0) {
2386                 struct file_struct *file;
2387
2388                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
2389                         flags |= read_byte(f) << 8;
2390
2391                 if (flags == (XMIT_EXTENDED_FLAGS|XMIT_IO_ERROR_ENDLIST)) {
2392                         int err;
2393                         if (protocol_version < 31) {
2394                                 rprintf(FERROR, "Invalid flist flag: %x\n", flags);
2395                                 exit_cleanup(RERR_PROTOCOL);
2396                         }
2397                         err = read_varint(f);
2398                         if (!ignore_errors)
2399                                 io_error |= err;
2400                         break;
2401                 }
2402
2403                 flist_expand(flist, 1);
2404                 file = recv_file_entry(flist, flags, f);
2405
2406                 if (S_ISREG(file->mode)) {
2407                         /* Already counted */
2408                 } else if (S_ISDIR(file->mode)) {
2409                         if (inc_recurse) {
2410                                 flist_expand(dir_flist, 1);
2411                                 dir_flist->files[dir_flist->used++] = file;
2412                         }
2413                         stats.num_dirs++;
2414                 } else if (S_ISLNK(file->mode))
2415                         stats.num_symlinks++;
2416                 else if (IS_DEVICE(file->mode))
2417                         stats.num_symlinks++;
2418                 else
2419                         stats.num_specials++;
2420
2421                 flist->files[flist->used++] = file;
2422
2423                 maybe_emit_filelist_progress(flist->used);
2424
2425                 if (DEBUG_GTE(FLIST, 2)) {
2426                         char *name = f_name(file, NULL);
2427                         rprintf(FINFO, "recv_file_name(%s)\n", NS(name));
2428                 }
2429         }
2430         file_total += flist->used;
2431
2432         if (DEBUG_GTE(FLIST, 2))
2433                 rprintf(FINFO, "received %d names\n", flist->used);
2434
2435         if (show_filelist_p())
2436                 finish_filelist_progress(flist);
2437
2438         if (need_unsorted_flist) {
2439                 /* Create an extra array of index pointers that we can sort for
2440                  * the generator's use (for wading through the files in sorted
2441                  * order and for calling flist_find()).  We keep the "files"
2442                  * list unsorted for our exchange of index numbers with the
2443                  * other side (since their names may not sort the same). */
2444                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2445                         out_of_memory("recv_file_list");
2446                 memcpy(flist->sorted, flist->files,
2447                        flist->used * sizeof (struct file_struct*));
2448                 if (inc_recurse && dir_flist->used > dstart) {
2449                         static int dir_flist_malloced = 0;
2450                         if (dir_flist_malloced < dir_flist->malloced) {
2451                                 dir_flist->sorted = realloc_array(dir_flist->sorted,
2452                                                         struct file_struct *,
2453                                                         dir_flist->malloced);
2454                                 dir_flist_malloced = dir_flist->malloced;
2455                         }
2456                         memcpy(dir_flist->sorted + dstart, dir_flist->files + dstart,
2457                                (dir_flist->used - dstart) * sizeof (struct file_struct*));
2458                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2459                 }
2460         } else {
2461                 flist->sorted = flist->files;
2462                 if (inc_recurse && dir_flist->used > dstart) {
2463                         dir_flist->sorted = dir_flist->files;
2464                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2465                 }
2466         }
2467
2468         if (inc_recurse)
2469                 flist_done_allocating(flist);
2470         else if (f >= 0) {
2471                 recv_id_list(f, flist);
2472                 flist_eof = 1;
2473         }
2474
2475         flist_sort_and_clean(flist, relative_paths);
2476
2477         if (protocol_version < 30) {
2478                 /* Recv the io_error flag */
2479                 int err = read_int(f);
2480                 if (!ignore_errors)
2481                         io_error |= err;
2482         } else if (inc_recurse && flist->ndx_start == 1) {
2483                 if (!file_total || strcmp(flist->sorted[flist->low]->basename, ".") != 0)
2484                         flist->parent_ndx = -1;
2485         }
2486
2487         if (DEBUG_GTE(FLIST, 3))
2488                 output_flist(flist);
2489
2490         if (DEBUG_GTE(FLIST, 2))
2491                 rprintf(FINFO, "recv_file_list done\n");
2492
2493         stats.flist_size += stats.total_read - start_read;
2494         stats.num_files += flist->used;
2495
2496         return flist;
2497 }
2498
2499 /* This is only used once by the receiver if the very first file-list
2500  * has exactly one item in it. */
2501 void recv_additional_file_list(int f)
2502 {
2503         struct file_list *flist;
2504         int ndx = read_ndx(f);
2505         if (ndx == NDX_FLIST_EOF) {
2506                 flist_eof = 1;
2507                 change_local_filter_dir(NULL, 0, 0);
2508         } else {
2509                 ndx = NDX_FLIST_OFFSET - ndx;
2510                 if (ndx < 0 || ndx >= dir_flist->used) {
2511                         ndx = NDX_FLIST_OFFSET - ndx;
2512                         rprintf(FERROR,
2513                                 "[%s] Invalid dir index: %d (%d - %d)\n",
2514                                 who_am_i(), ndx, NDX_FLIST_OFFSET,
2515                                 NDX_FLIST_OFFSET - dir_flist->used + 1);
2516                         exit_cleanup(RERR_PROTOCOL);
2517                 }
2518                 if (DEBUG_GTE(FLIST, 3)) {
2519                         rprintf(FINFO, "[%s] receiving flist for dir %d\n",
2520                                 who_am_i(), ndx);
2521                 }
2522                 flist = recv_file_list(f);
2523                 flist->parent_ndx = ndx;
2524         }
2525 }
2526
2527 /* Search for an identically-named item in the file list.  Note that the
2528  * items must agree in their directory-ness, or no match is returned. */
2529 int flist_find(struct file_list *flist, struct file_struct *f)
2530 {
2531         int low = flist->low, high = flist->high;
2532         int diff, mid, mid_up;
2533
2534         while (low <= high) {
2535                 mid = (low + high) / 2;
2536                 if (F_IS_ACTIVE(flist->sorted[mid]))
2537                         mid_up = mid;
2538                 else {
2539                         /* Scan for the next non-empty entry using the cached
2540                          * distance values.  If the value isn't fully up-to-
2541                          * date, update it. */
2542                         mid_up = mid + F_DEPTH(flist->sorted[mid]);
2543                         if (!F_IS_ACTIVE(flist->sorted[mid_up])) {
2544                                 do {
2545                                     mid_up += F_DEPTH(flist->sorted[mid_up]);
2546                                 } while (!F_IS_ACTIVE(flist->sorted[mid_up]));
2547                                 F_DEPTH(flist->sorted[mid]) = mid_up - mid;
2548                         }
2549                         if (mid_up > high) {
2550                                 /* If there's nothing left above us, set high to
2551                                  * a non-empty entry below us and continue. */
2552                                 high = mid - (int)flist->sorted[mid]->len32;
2553                                 if (!F_IS_ACTIVE(flist->sorted[high])) {
2554                                         do {
2555                                             high -= (int)flist->sorted[high]->len32;
2556                                         } while (!F_IS_ACTIVE(flist->sorted[high]));
2557                                         flist->sorted[mid]->len32 = mid - high;
2558                                 }
2559                                 continue;
2560                         }
2561                 }
2562                 diff = f_name_cmp(flist->sorted[mid_up], f);
2563                 if (diff == 0) {
2564                         if (protocol_version < 29
2565                             && S_ISDIR(flist->sorted[mid_up]->mode)
2566                             != S_ISDIR(f->mode))
2567                                 return -1;
2568                         return mid_up;
2569                 }
2570                 if (diff < 0)
2571                         low = mid_up + 1;
2572                 else
2573                         high = mid - 1;
2574         }
2575         return -1;
2576 }
2577
2578 /* Search for an identically-named item in the file list.  Differs from
2579  * flist_find in that an item that agrees with "f" in directory-ness is
2580  * preferred but one that does not is still found. */
2581 int flist_find_ignore_dirness(struct file_list *flist, struct file_struct *f)
2582 {
2583         mode_t save_mode;
2584         int ndx;
2585
2586         /* First look for an item that agrees in directory-ness. */
2587         ndx = flist_find(flist, f);
2588         if (ndx >= 0)
2589                 return ndx;
2590
2591         /* Temporarily flip f->mode to look for an item of opposite
2592          * directory-ness. */
2593         save_mode = f->mode;
2594         f->mode = S_ISDIR(f->mode) ? S_IFREG : S_IFDIR;
2595         ndx = flist_find(flist, f);
2596         f->mode = save_mode;
2597         return ndx;
2598 }
2599
2600 /*
2601  * Free up any resources a file_struct has allocated
2602  * and clear the file.
2603  */
2604 void clear_file(struct file_struct *file)
2605 {
2606         /* The +1 zeros out the first char of the basename. */
2607         memset(file, 0, FILE_STRUCT_LEN + 1);
2608         /* In an empty entry, F_DEPTH() is an offset to the next non-empty
2609          * entry.  Likewise for len32 in the opposite direction.  We assume
2610          * that we're alone for now since flist_find() will adjust the counts
2611          * it runs into that aren't up-to-date. */
2612         file->len32 = F_DEPTH(file) = 1;
2613 }
2614
2615 /* Allocate a new file list. */
2616 struct file_list *flist_new(int flags, char *msg)
2617 {
2618         struct file_list *flist;
2619
2620         if (!(flist = new0(struct file_list)))
2621                 out_of_memory(msg);
2622
2623         if (flags & FLIST_TEMP) {
2624                 if (!(flist->file_pool = pool_create(SMALL_EXTENT, 0,
2625                                                      out_of_memory,
2626                                                      POOL_INTERN)))
2627                         out_of_memory(msg);
2628         } else {
2629                 /* This is a doubly linked list with prev looping back to
2630                  * the end of the list, but the last next pointer is NULL. */
2631                 if (!first_flist) {
2632                         flist->file_pool = pool_create(NORMAL_EXTENT, 0,
2633                                                        out_of_memory,
2634                                                        POOL_INTERN);
2635                         if (!flist->file_pool)
2636                                 out_of_memory(msg);
2637
2638                         flist->ndx_start = flist->flist_num = inc_recurse ? 1 : 0;
2639
2640                         first_flist = cur_flist = flist->prev = flist;
2641                 } else {
2642                         struct file_list *prev = first_flist->prev;
2643
2644                         flist->file_pool = first_flist->file_pool;
2645
2646                         flist->ndx_start = prev->ndx_start + prev->used + 1;
2647                         flist->flist_num = prev->flist_num + 1;
2648
2649                         flist->prev = prev;
2650                         prev->next = first_flist->prev = flist;
2651                 }
2652                 flist->pool_boundary = pool_boundary(flist->file_pool, 0);
2653                 flist_cnt++;
2654         }
2655
2656         return flist;
2657 }
2658
2659 /* Free up all elements in a flist. */
2660 void flist_free(struct file_list *flist)
2661 {
2662         if (!flist->prev) {
2663                 /* Was FLIST_TEMP dir-list. */
2664         } else if (flist == flist->prev) {
2665                 first_flist = cur_flist = NULL;
2666                 file_total = 0;
2667                 flist_cnt = 0;
2668         } else {
2669                 if (flist == cur_flist)
2670                         cur_flist = flist->next;
2671                 if (flist == first_flist)
2672                         first_flist = first_flist->next;
2673                 else {
2674                         flist->prev->next = flist->next;
2675                         if (!flist->next)
2676                                 flist->next = first_flist;
2677                 }
2678                 flist->next->prev = flist->prev;
2679                 file_total -= flist->used;
2680                 flist_cnt--;
2681         }
2682
2683         if (!flist->prev || !flist_cnt)
2684                 pool_destroy(flist->file_pool);
2685         else
2686                 pool_free_old(flist->file_pool, flist->pool_boundary);
2687
2688         if (flist->sorted && flist->sorted != flist->files)
2689                 free(flist->sorted);
2690         free(flist->files);
2691         free(flist);
2692 }
2693
2694 /* This routine ensures we don't have any duplicate names in our file list.
2695  * duplicate names can cause corruption because of the pipelining. */
2696 static void flist_sort_and_clean(struct file_list *flist, int strip_root)
2697 {
2698         char fbuf[MAXPATHLEN];
2699         int i, prev_i;
2700
2701         if (!flist)
2702                 return;
2703         if (flist->used == 0) {
2704                 flist->high = -1;
2705                 flist->low = 0;
2706                 return;
2707         }
2708
2709         fsort(flist->sorted, flist->used);
2710
2711         if (!am_sender || inc_recurse) {
2712                 for (i = prev_i = 0; i < flist->used; i++) {
2713                         if (F_IS_ACTIVE(flist->sorted[i])) {
2714                                 prev_i = i;
2715                                 break;
2716                         }
2717                 }
2718                 flist->low = prev_i;
2719         } else {
2720                 i = prev_i = flist->used - 1;
2721                 flist->low = 0;
2722         }
2723
2724         while (++i < flist->used) {
2725                 int j;
2726                 struct file_struct *file = flist->sorted[i];
2727
2728                 if (!F_IS_ACTIVE(file))
2729                         continue;
2730                 if (f_name_cmp(file, flist->sorted[prev_i]) == 0)
2731                         j = prev_i;
2732                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
2733                         int save_mode = file->mode;
2734                         /* Make sure that this directory doesn't duplicate a
2735                          * non-directory earlier in the list. */
2736                         flist->high = prev_i;
2737                         file->mode = S_IFREG;
2738                         j = flist_find(flist, file);
2739                         file->mode = save_mode;
2740                 } else
2741                         j = -1;
2742                 if (j >= 0) {
2743                         int keep, drop;
2744                         /* If one is a dir and the other is not, we want to
2745                          * keep the dir because it might have contents in the
2746                          * list.  Otherwise keep the first one. */
2747                         if (S_ISDIR(file->mode)) {
2748                                 struct file_struct *fp = flist->sorted[j];
2749                                 if (!S_ISDIR(fp->mode))
2750                                         keep = i, drop = j;
2751                                 else {
2752                                         if (am_sender)
2753                                                 file->flags |= FLAG_DUPLICATE;
2754                                         else { /* Make sure we merge our vital flags. */
2755                                                 fp->flags |= file->flags & (FLAG_TOP_DIR|FLAG_CONTENT_DIR);
2756                                                 fp->flags &= file->flags | ~FLAG_IMPLIED_DIR;
2757                                         }
2758                                         keep = j, drop = i;
2759                                 }
2760                         } else
2761                                 keep = j, drop = i;
2762
2763                         if (!am_sender) {
2764                                 if (DEBUG_GTE(DUP, 1)) {
2765                                         rprintf(FINFO,
2766                                             "removing duplicate name %s from file list (%d)\n",
2767                                             f_name(file, fbuf), drop + flist->ndx_start);
2768                                 }
2769                                 clear_file(flist->sorted[drop]);
2770                         }
2771
2772                         if (keep == i) {
2773                                 if (flist->low == drop) {
2774                                         for (j = drop + 1;
2775                                              j < i && !F_IS_ACTIVE(flist->sorted[j]);
2776                                              j++) {}
2777                                         flist->low = j;
2778                                 }
2779                                 prev_i = i;
2780                         }
2781                 } else
2782                         prev_i = i;
2783         }
2784         flist->high = prev_i;
2785
2786         if (strip_root) {
2787                 /* We need to strip off the leading slashes for relative
2788                  * paths, but this must be done _after_ the sorting phase. */
2789                 for (i = flist->low; i <= flist->high; i++) {
2790                         struct file_struct *file = flist->sorted[i];
2791
2792                         if (!file->dirname)
2793                                 continue;
2794                         while (*file->dirname == '/')
2795                                 file->dirname++;
2796                         if (!*file->dirname)
2797                                 file->dirname = NULL;
2798                 }
2799         }
2800
2801         if (prune_empty_dirs && !am_sender) {
2802                 int j, prev_depth = 0;
2803
2804                 prev_i = 0; /* It's OK that this isn't really true. */
2805
2806                 for (i = flist->low; i <= flist->high; i++) {
2807                         struct file_struct *fp, *file = flist->sorted[i];
2808
2809                         /* This temporarily abuses the F_DEPTH() value for a
2810                          * directory that is in a chain that might get pruned.
2811                          * We restore the old value if it gets a reprieve. */
2812                         if (S_ISDIR(file->mode) && F_DEPTH(file)) {
2813                                 /* Dump empty dirs when coming back down. */
2814                                 for (j = prev_depth; j >= F_DEPTH(file); j--) {
2815                                         fp = flist->sorted[prev_i];
2816                                         if (F_DEPTH(fp) >= 0)
2817                                                 break;
2818                                         prev_i = -F_DEPTH(fp)-1;
2819                                         clear_file(fp);
2820                                 }
2821                                 prev_depth = F_DEPTH(file);
2822                                 if (is_excluded(f_name(file, fbuf), 1,
2823                                                        ALL_FILTERS)) {
2824                                         /* Keep dirs through this dir. */
2825                                         for (j = prev_depth-1; ; j--) {
2826                                                 fp = flist->sorted[prev_i];
2827                                                 if (F_DEPTH(fp) >= 0)
2828                                                         break;
2829                                                 prev_i = -F_DEPTH(fp)-1;
2830                                                 F_DEPTH(fp) = j;
2831                                         }
2832                                 } else
2833                                         F_DEPTH(file) = -prev_i-1;
2834                                 prev_i = i;
2835                         } else {
2836                                 /* Keep dirs through this non-dir. */
2837                                 for (j = prev_depth; ; j--) {
2838                                         fp = flist->sorted[prev_i];
2839                                         if (F_DEPTH(fp) >= 0)
2840                                                 break;
2841                                         prev_i = -F_DEPTH(fp)-1;
2842                                         F_DEPTH(fp) = j;
2843                                 }
2844                         }
2845                 }
2846                 /* Dump all remaining empty dirs. */
2847                 while (1) {
2848                         struct file_struct *fp = flist->sorted[prev_i];
2849                         if (F_DEPTH(fp) >= 0)
2850                                 break;
2851                         prev_i = -F_DEPTH(fp)-1;
2852                         clear_file(fp);
2853                 }
2854
2855                 for (i = flist->low; i <= flist->high; i++) {
2856                         if (F_IS_ACTIVE(flist->sorted[i]))
2857                                 break;
2858                 }
2859                 flist->low = i;
2860                 for (i = flist->high; i >= flist->low; i--) {
2861                         if (F_IS_ACTIVE(flist->sorted[i]))
2862                                 break;
2863                 }
2864                 flist->high = i;
2865         }
2866 }
2867
2868 static void output_flist(struct file_list *flist)
2869 {
2870         char uidbuf[16], gidbuf[16], depthbuf[16];
2871         struct file_struct *file;
2872         const char *root, *dir, *slash, *name, *trail;
2873         const char *who = who_am_i();
2874         int i;
2875
2876         rprintf(FINFO, "[%s] flist start=%d, used=%d, low=%d, high=%d\n",
2877                 who, flist->ndx_start, flist->used, flist->low, flist->high);
2878         for (i = 0; i < flist->used; i++) {
2879                 file = flist->files[i];
2880                 if ((am_root || am_sender) && uid_ndx) {
2881                         snprintf(uidbuf, sizeof uidbuf, " uid=%u",
2882                                  F_OWNER(file));
2883                 } else
2884                         *uidbuf = '\0';
2885                 if (gid_ndx) {
2886                         static char parens[] = "(\0)\0\0\0";
2887                         char *pp = parens + (file->flags & FLAG_SKIP_GROUP ? 0 : 3);
2888                         snprintf(gidbuf, sizeof gidbuf, " gid=%s%u%s",
2889                                  pp, F_GROUP(file), pp + 2);
2890                 } else
2891                         *gidbuf = '\0';
2892                 if (!am_sender)
2893                         snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file));
2894                 if (F_IS_ACTIVE(file)) {
2895                         root = am_sender ? NS(F_PATHNAME(file)) : depthbuf;
2896                         if ((dir = file->dirname) == NULL)
2897                                 dir = slash = "";
2898                         else
2899                                 slash = "/";
2900                         name = file->basename;
2901                         trail = S_ISDIR(file->mode) ? "/" : "";
2902                 } else
2903                         root = dir = slash = name = trail = "";
2904                 rprintf(FINFO,
2905                         "[%s] i=%d %s %s%s%s%s mode=0%o len=%s%s%s flags=%x\n",
2906                         who, i + flist->ndx_start,
2907                         root, dir, slash, name, trail,
2908                         (int)file->mode, comma_num(F_LENGTH(file)),
2909                         uidbuf, gidbuf, file->flags);
2910         }
2911 }
2912
2913 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
2914 enum fnc_type { t_PATH, t_ITEM };
2915
2916 static int found_prefix;
2917
2918 /* Compare the names of two file_struct entities, similar to how strcmp()
2919  * would do if it were operating on the joined strings.
2920  *
2921  * Some differences beginning with protocol_version 29: (1) directory names
2922  * are compared with an assumed trailing slash so that they compare in a
2923  * way that would cause them to sort immediately prior to any content they
2924  * may have; (2) a directory of any name compares after a non-directory of
2925  * any name at the same depth; (3) a directory with name "." compares prior
2926  * to anything else.  These changes mean that a directory and a non-dir
2927  * with the same name will not compare as equal (protocol_version >= 29).
2928  *
2929  * The dirname component can be an empty string, but the basename component
2930  * cannot (and never is in the current codebase).  The basename component
2931  * may be NULL (for a removed item), in which case it is considered to be
2932  * after any existing item. */
2933 int f_name_cmp(const struct file_struct *f1, const struct file_struct *f2)
2934 {
2935         int dif;
2936         const uchar *c1, *c2;
2937         enum fnc_state state1, state2;
2938         enum fnc_type type1, type2;
2939         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
2940
2941         if (!f1 || !F_IS_ACTIVE(f1)) {
2942                 if (!f2 || !F_IS_ACTIVE(f2))
2943                         return 0;
2944                 return -1;
2945         }
2946         if (!f2 || !F_IS_ACTIVE(f2))
2947                 return 1;
2948
2949         c1 = (uchar*)f1->dirname;
2950         c2 = (uchar*)f2->dirname;
2951         if (c1 == c2)
2952                 c1 = c2 = NULL;
2953         if (!c1) {
2954                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2955                 c1 = (const uchar*)f1->basename;
2956                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2957                         type1 = t_ITEM;
2958                         state1 = s_TRAILING;
2959                         c1 = (uchar*)"";
2960                 } else
2961                         state1 = s_BASE;
2962         } else {
2963                 type1 = t_path;
2964                 state1 = s_DIR;
2965         }
2966         if (!c2) {
2967                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2968                 c2 = (const uchar*)f2->basename;
2969                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2970                         type2 = t_ITEM;
2971                         state2 = s_TRAILING;
2972                         c2 = (uchar*)"";
2973                 } else
2974                         state2 = s_BASE;
2975         } else {
2976                 type2 = t_path;
2977                 state2 = s_DIR;
2978         }
2979
2980         if (type1 != type2)
2981                 return type1 == t_PATH ? 1 : -1;
2982
2983         do {
2984                 if (!*c1) {
2985                         switch (state1) {
2986                         case s_DIR:
2987                                 state1 = s_SLASH;
2988                                 c1 = (uchar*)"/";
2989                                 break;
2990                         case s_SLASH:
2991                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2992                                 c1 = (const uchar*)f1->basename;
2993                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2994                                         type1 = t_ITEM;
2995                                         state1 = s_TRAILING;
2996                                         c1 = (uchar*)"";
2997                                 } else
2998                                         state1 = s_BASE;
2999                                 break;
3000                         case s_BASE:
3001                                 state1 = s_TRAILING;
3002                                 if (type1 == t_PATH) {
3003                                         c1 = (uchar*)"/";
3004                                         break;
3005                                 }
3006                                 /* FALL THROUGH */
3007                         case s_TRAILING:
3008                                 type1 = t_ITEM;
3009                                 break;
3010                         }
3011                         if (*c2 && type1 != type2)
3012                                 return type1 == t_PATH ? 1 : -1;
3013                 }
3014                 if (!*c2) {
3015                         switch (state2) {
3016                         case s_DIR:
3017                                 state2 = s_SLASH;
3018                                 c2 = (uchar*)"/";
3019                                 break;
3020                         case s_SLASH:
3021                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
3022                                 c2 = (const uchar*)f2->basename;
3023                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
3024                                         type2 = t_ITEM;
3025                                         state2 = s_TRAILING;
3026                                         c2 = (uchar*)"";
3027                                 } else
3028                                         state2 = s_BASE;
3029                                 break;
3030                         case s_BASE:
3031                                 state2 = s_TRAILING;
3032                                 if (type2 == t_PATH) {
3033                                         c2 = (uchar*)"/";
3034                                         break;
3035                                 }
3036                                 /* FALL THROUGH */
3037                         case s_TRAILING:
3038                                 found_prefix = 1;
3039                                 if (!*c1)
3040                                         return 0;
3041                                 type2 = t_ITEM;
3042                                 break;
3043                         }
3044                         if (type1 != type2)
3045                                 return type1 == t_PATH ? 1 : -1;
3046                 }
3047         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
3048
3049         return dif;
3050 }
3051
3052 /* Returns 1 if f1's filename has all of f2's filename as a prefix.  This does
3053  * not match if f2's basename is not an exact match of a path element in f1.
3054  * E.g. /path/foo is not a prefix of /path/foobar/baz, but /path/foobar is. */
3055 int f_name_has_prefix(const struct file_struct *f1, const struct file_struct *f2)
3056 {
3057         found_prefix = 0;
3058         f_name_cmp(f1, f2);
3059         return found_prefix;
3060 }
3061
3062 char *f_name_buf(void)
3063 {
3064         static char names[5][MAXPATHLEN];
3065         static unsigned int n;
3066
3067         n = (n + 1) % (sizeof names / sizeof names[0]);
3068
3069         return names[n];
3070 }
3071
3072 /* Return a copy of the full filename of a flist entry, using the indicated
3073  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
3074  * done because we checked the size when creating the file_struct entry.
3075  */
3076 char *f_name(const struct file_struct *f, char *fbuf)
3077 {
3078         if (!f || !F_IS_ACTIVE(f))
3079                 return NULL;
3080
3081         if (!fbuf)
3082                 fbuf = f_name_buf();
3083
3084         if (f->dirname) {
3085                 int len = strlen(f->dirname);
3086                 memcpy(fbuf, f->dirname, len);
3087                 fbuf[len] = '/';
3088                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
3089         } else
3090                 strlcpy(fbuf, f->basename, MAXPATHLEN);
3091
3092         return fbuf;
3093 }
3094
3095 /* Do a non-recursive scan of the named directory, possibly ignoring all
3096  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
3097  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
3098  * buffer (the functions we call will append names onto the end, but the old
3099  * dir value will be restored on exit). */
3100 struct file_list *get_dirlist(char *dirname, int dlen, int ignore_filter_rules)
3101 {
3102         struct file_list *dirlist;
3103         char dirbuf[MAXPATHLEN];
3104         int save_recurse = recurse;
3105         int save_xfer_dirs = xfer_dirs;
3106         int save_prune_empty_dirs = prune_empty_dirs;
3107
3108         if (dlen < 0) {
3109                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
3110                 if (dlen >= MAXPATHLEN)
3111                         return NULL;
3112                 dirname = dirbuf;
3113         }
3114
3115         dirlist = flist_new(FLIST_TEMP, "get_dirlist");
3116
3117         recurse = 0;
3118         xfer_dirs = 1;
3119         send_directory(ignore_filter_rules ? -2 : -1, dirlist, dirname, dlen, FLAG_CONTENT_DIR);
3120         xfer_dirs = save_xfer_dirs;
3121         recurse = save_recurse;
3122         if (INFO_GTE(PROGRESS, 1))
3123                 flist_count_offset += dirlist->used;
3124
3125         prune_empty_dirs = 0;
3126         dirlist->sorted = dirlist->files;
3127         flist_sort_and_clean(dirlist, 0);
3128         prune_empty_dirs = save_prune_empty_dirs;
3129
3130         if (DEBUG_GTE(FLIST, 3))
3131                 output_flist(dirlist);
3132
3133         return dirlist;
3134 }