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) 2002-2020 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 checksum_type;
  37 extern int module_id;
  38 extern int ignore_errors;
  39 extern int numeric_ids;
  40 extern int quiet;
  41 extern int recurse;
  42 extern int use_qsort;
  43 extern int xfer_dirs;
  44 extern int filesfrom_fd;
  45 extern int one_file_system;
  46 extern int copy_dirlinks;
  47 extern int preserve_uid;
  48 extern int preserve_gid;
  49 extern int preserve_acls;
  50 extern int preserve_xattrs;
  51 extern int preserve_links;
  52 extern int preserve_hard_links;
  53 extern int preserve_devices;
  54 extern int preserve_specials;
  55 extern int delete_during;
  56 extern int missing_args;
  57 extern int eol_nulls;
  58 extern int atimes_ndx;
  59 extern int relative_paths;
  60 extern int implied_dirs;
  61 extern int ignore_perishable;
  62 extern int non_perishable_cnt;
  63 extern int prune_empty_dirs;
  64 extern int copy_links;
  65 extern int copy_unsafe_links;
  66 extern int protocol_version;
  67 extern int sanitize_paths;
  68 extern int munge_symlinks;
  69 extern int use_safe_inc_flist;
  70 extern int need_unsorted_flist;
  71 extern int sender_symlink_iconv;
  72 extern int output_needs_newline;
  73 extern int sender_keeps_checksum;
  74 extern int unsort_ndx;
  75 extern uid_t our_uid;
  76 extern struct stats stats;
  77 extern char *filesfrom_host;
  78 extern char *usermap, *groupmap;
  79
  80 extern char curr_dir[MAXPATHLEN];
  81
  82 extern struct chmod_mode_struct *chmod_modes;
  83
  84 extern filter_rule_list filter_list;
  85 extern filter_rule_list daemon_filter_list;
  86
  87 #ifdef ICONV_OPTION
  88 extern int filesfrom_convert;
  89 extern iconv_t ic_send, ic_recv;
  90 #endif
  91
  92 #define PTR_SIZE (sizeof (struct file_struct *))
  93
  94 int io_error;
  95 int flist_csum_len;
  96 dev_t filesystem_dev; /* used to implement -x */
  97
  98 struct file_list *cur_flist, *first_flist, *dir_flist;
  99 int send_dir_ndx = -1, send_dir_depth = -1;
 100 int flist_cnt = 0; /* how many (non-tmp) file list objects exist */
 101 int file_total = 0; /* total of all active items over all file-lists */
 102 int file_old_total = 0; /* total of active items that will soon be gone */
 103 int flist_eof = 0; /* all the file-lists are now known */
 104 int xfer_flags_as_varint = 0;
 105
 106 #define NORMAL_NAME 0
 107 #define SLASH_ENDING_NAME 1
 108 #define DOTDIR_NAME 2
 109 #define MISSING_NAME 3
 110
 111 /* Starting from protocol version 26, we always use 64-bit ino_t and dev_t
 112  * internally, even if this platform does not allow files to have 64-bit inums.
 113  * The only exception is if we're on a platform with no 64-bit type at all.
 114  *
 115  * Because we use read_longint() to get these off the wire, if you transfer
 116  * devices or (for protocols < 30) hardlinks with dev or inum > 2**32 to a
 117  * machine with no 64-bit types then you will get an overflow error.
 118  *
 119  * Note that if you transfer devices from a 64-bit-devt machine (say, Solaris)
 120  * to a 32-bit-devt machine (say, Linux-2.2/x86) then the device numbers will
 121  * be truncated.  But it's a kind of silly thing to do anyhow. */
 122
 123 /* The tmp_* vars are used as a cache area by make_file() to store data
 124  * that the sender doesn't need to remember in its file list.  The data
 125  * will survive just long enough to be used by send_file_entry(). */
 126 static dev_t tmp_rdev;
 127 #ifdef SUPPORT_HARD_LINKS
 128 static int64 tmp_dev = -1, tmp_ino;
 129 #endif
 130 static char tmp_sum[MAX_DIGEST_LEN];
 131
 132 static char empty_sum[MAX_DIGEST_LEN];
 133 static int flist_count_offset; /* for --delete --progress */
 134 static int show_filelist_progress;
 135
 136 static void flist_sort_and_clean(struct file_list *flist, int strip_root);
 137 static void output_flist(struct file_list *flist);
 138
 139 void init_flist(void)
 140 {
 141         if (DEBUG_GTE(FLIST, 4)) {
 142                 rprintf(FINFO, "FILE_STRUCT_LEN=%d, EXTRA_LEN=%d\n",
 143                         (int)FILE_STRUCT_LEN, (int)EXTRA_LEN);
 144         }
 145         flist_csum_len = csum_len_for_type(checksum_type, 1);
 146
 147         show_filelist_progress = INFO_GTE(FLIST, 1) && xfer_dirs && !am_server && !inc_recurse;
 148 }
 149
 150 static void start_filelist_progress(char *kind)
 151 {
 152         if (quiet)
 153                 return;
 154         rprintf(FCLIENT, "%s ... ", kind);
 155         output_needs_newline = 1;
 156         rflush(FINFO);
 157 }
 158
 159 static void emit_filelist_progress(int count)
 160 {
 161         if (quiet)
 162                 return;
 163         if (output_needs_newline == 2) /* avoid a newline in the middle of this filelist-progress output */
 164                 output_needs_newline = 0;
 165         rprintf(FCLIENT, " %d files...\r", count);
 166         output_needs_newline = 2;
 167 }
 168
 169 static void maybe_emit_filelist_progress(int count)
 170 {
 171         if (INFO_GTE(FLIST, 2) && show_filelist_progress && (count % 100) == 0)
 172                 emit_filelist_progress(count);
 173 }
 174
 175 static void finish_filelist_progress(const struct file_list *flist)
 176 {
 177         output_needs_newline = 0;
 178         if (INFO_GTE(FLIST, 2)) {
 179                 /* This overwrites the progress line */
 180                 rprintf(FINFO, "%d file%sto consider\n",
 181                         flist->used, flist->used == 1 ? " " : "s ");
 182         } else {
 183                 rprintf(FINFO, "done\n");
 184         }
 185 }
 186
 187 void show_flist_stats(void)
 188 {
 189         /* Nothing yet */
 190 }
 191
 192 /* Stat either a symlink or its referent, depending on the settings of
 193  * copy_links, copy_unsafe_links, etc.  Returns -1 on error, 0 on success.
 194  *
 195  * If path is the name of a symlink, then the linkbuf buffer (which must hold
 196  * MAXPATHLEN chars) will be set to the symlink's target string.
 197  *
 198  * The stat structure pointed to by stp will contain information about the
 199  * link or the referent as appropriate, if they exist. */
 200 static int readlink_stat(const char *path, STRUCT_STAT *stp, char *linkbuf)
 201 {
 202 #ifdef SUPPORT_LINKS
 203         if (link_stat(path, stp, copy_dirlinks) < 0)
 204                 return -1;
 205         if (S_ISLNK(stp->st_mode)) {
 206                 int llen = do_readlink(path, linkbuf, MAXPATHLEN - 1);
 207                 if (llen < 0)
 208                         return -1;
 209                 linkbuf[llen] = '\0';
 210                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 211                         if (INFO_GTE(SYMSAFE, 1)) {
 212                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 213                                         path, linkbuf);
 214                         }
 215                         return x_stat(path, stp, NULL);
 216                 }
 217                 if (munge_symlinks && am_sender && llen > SYMLINK_PREFIX_LEN
 218                  && strncmp(linkbuf, SYMLINK_PREFIX, SYMLINK_PREFIX_LEN) == 0) {
 219                         memmove(linkbuf, linkbuf + SYMLINK_PREFIX_LEN,
 220                                 llen - SYMLINK_PREFIX_LEN + 1);
 221                 }
 222         }
 223         return 0;
 224 #else
 225         return x_stat(path, stp, NULL);
 226 #endif
 227 }
 228
 229 int link_stat(const char *path, STRUCT_STAT *stp, int follow_dirlinks)
 230 {
 231 #ifdef SUPPORT_LINKS
 232         if (copy_links)
 233                 return x_stat(path, stp, NULL);
 234         if (x_lstat(path, stp, NULL) < 0)
 235                 return -1;
 236         if (follow_dirlinks && S_ISLNK(stp->st_mode)) {
 237                 STRUCT_STAT st;
 238                 if (x_stat(path, &st, NULL) == 0 && S_ISDIR(st.st_mode))
 239                         *stp = st;
 240         }
 241         return 0;
 242 #else
 243         return x_stat(path, stp, NULL);
 244 #endif
 245 }
 246
 247 static inline int path_is_daemon_excluded(char *path, int ignore_filename)
 248 {
 249         if (daemon_filter_list.head) {
 250                 char *slash = path;
 251
 252                 while ((slash = strchr(slash+1, '/')) != NULL) {
 253                         int ret;
 254                         *slash = '\0';
 255                         ret = check_filter(&daemon_filter_list, FLOG, path, 1);
 256                         *slash = '/';
 257                         if (ret < 0) {
 258                                 errno = ENOENT;
 259                                 return 1;
 260                         }
 261                 }
 262
 263                 if (!ignore_filename
 264                  && check_filter(&daemon_filter_list, FLOG, path, 1) < 0) {
 265                         errno = ENOENT;
 266                         return 1;
 267                 }
 268         }
 269
 270         return 0;
 271 }
 272
 273 static inline int is_excluded(const char *fname, int is_dir, int filter_level)
 274 {
 275         return name_is_excluded(fname, is_dir ? NAME_IS_DIR : NAME_IS_FILE, filter_level);
 276 }
 277
 278 static void send_directory(int f, struct file_list *flist,
 279                            char *fbuf, int len, int flags);
 280
 281 static const char *pathname, *orig_dir;
 282 static int pathname_len;
 283
 284 /* Make sure flist can hold at least flist->used + extra entries. */
 285 static void flist_expand(struct file_list *flist, int extra)
 286 {
 287         struct file_struct **new_ptr;
 288
 289         if (flist->used + extra <= flist->malloced)
 290                 return;
 291
 292         if (flist->malloced < FLIST_START)
 293                 flist->malloced = FLIST_START;
 294         else if (flist->malloced >= FLIST_LINEAR)
 295                 flist->malloced += FLIST_LINEAR;
 296         else
 297                 flist->malloced *= 2;
 298
 299         /* In case count jumped or we are starting the list
 300          * with a known size just set it. */
 301         if (flist->malloced < flist->used + extra)
 302                 flist->malloced = flist->used + extra;
 303
 304         new_ptr = realloc_array(flist->files, struct file_struct *,
 305                                 flist->malloced);
 306
 307         if (DEBUG_GTE(FLIST, 1) && flist->malloced != FLIST_START) {
 308                 rprintf(FCLIENT, "[%s] expand file_list pointer array to %s bytes, did%s move\n",
 309                     who_am_i(),
 310                     big_num(sizeof flist->files[0] * flist->malloced),
 311                     (new_ptr == flist->files) ? " not" : "");
 312         }
 313
 314         flist->files = new_ptr;
 315
 316         if (!flist->files)
 317                 out_of_memory("flist_expand");
 318 }
 319
 320 static void flist_done_allocating(struct file_list *flist)
 321 {
 322         void *ptr = pool_boundary(flist->file_pool, 8*1024);
 323         if (flist->pool_boundary == ptr)
 324                 flist->pool_boundary = NULL; /* list didn't use any pool memory */
 325         else
 326                 flist->pool_boundary = ptr;
 327 }
 328
 329 /* Call this with EITHER (1) "file, NULL, 0" to chdir() to the file's
 330  * F_PATHNAME(), or (2) "NULL, dir, dirlen" to chdir() to the supplied dir,
 331  * with dir == NULL taken to be the starting directory, and dirlen < 0
 332  * indicating that strdup(dir) should be called and then the -dirlen length
 333  * value checked to ensure that it is not daemon-excluded. */
 334 int change_pathname(struct file_struct *file, const char *dir, int dirlen)
 335 {
 336         if (dirlen < 0) {
 337                 char *cpy = strdup(dir);
 338                 if (*cpy != '/')
 339                         change_dir(orig_dir, CD_SKIP_CHDIR);
 340                 if (path_is_daemon_excluded(cpy, 0))
 341                         goto chdir_error;
 342                 dir = cpy;
 343                 dirlen = -dirlen;
 344         } else {
 345                 if (file) {
 346                         if (pathname == F_PATHNAME(file))
 347                                 return 1;
 348                         dir = F_PATHNAME(file);
 349                         if (dir)
 350                                 dirlen = strlen(dir);
 351                 } else if (pathname == dir)
 352                         return 1;
 353                 if (dir && *dir != '/')
 354                         change_dir(orig_dir, CD_SKIP_CHDIR);
 355         }
 356
 357         pathname = dir;
 358         pathname_len = dirlen;
 359
 360         if (!dir)
 361                 dir = orig_dir;
 362
 363         if (!change_dir(dir, CD_NORMAL)) {
 364           chdir_error:
 365                 io_error |= IOERR_GENERAL;
 366                 rsyserr(FERROR_XFER, errno, "change_dir %s failed", full_fname(dir));
 367                 if (dir != orig_dir)
 368                         change_dir(orig_dir, CD_NORMAL);
 369                 pathname = NULL;
 370                 pathname_len = 0;
 371                 return 0;
 372         }
 373
 374         return 1;
 375 }
 376
 377 static void send_file_entry(int f, const char *fname, struct file_struct *file,
 378 #ifdef SUPPORT_LINKS
 379                             const char *symlink_name, int symlink_len,
 380 #endif
 381                             int ndx, int first_ndx)
 382 {
 383         static time_t modtime, atime;
 384         static mode_t mode;
 385 #ifdef SUPPORT_HARD_LINKS
 386         static int64 dev;
 387 #endif
 388         static dev_t rdev;
 389         static uint32 rdev_major;
 390         static uid_t uid;
 391         static gid_t gid;
 392         static const char *user_name, *group_name;
 393         static char lastname[MAXPATHLEN];
 394 #ifdef SUPPORT_HARD_LINKS
 395         int first_hlink_ndx = -1;
 396 #endif
 397         int l1, l2;
 398         int xflags;
 399
 400         /* Initialize starting value of xflags and adjust counts. */
 401         if (S_ISREG(file->mode))
 402                 xflags = 0;
 403         else if (S_ISDIR(file->mode)) {
 404                 stats.num_dirs++;
 405                 if (protocol_version >= 30) {
 406                         if (file->flags & FLAG_CONTENT_DIR)
 407                                 xflags = file->flags & FLAG_TOP_DIR;
 408                         else if (file->flags & FLAG_IMPLIED_DIR)
 409                                 xflags = XMIT_TOP_DIR | XMIT_NO_CONTENT_DIR;
 410                         else
 411                                 xflags = XMIT_NO_CONTENT_DIR;
 412                 } else
 413                         xflags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */
 414         } else {
 415                 if (S_ISLNK(file->mode))
 416                         stats.num_symlinks++;
 417                 else if (IS_DEVICE(file->mode))
 418                         stats.num_devices++;
 419                 else if (IS_SPECIAL(file->mode))
 420                         stats.num_specials++;
 421                 xflags = 0;
 422         }
 423
 424         if (file->mode == mode)
 425                 xflags |= XMIT_SAME_MODE;
 426         else
 427                 mode = file->mode;
 428
 429         if (preserve_devices && IS_DEVICE(mode)) {
 430                 if (protocol_version < 28) {
 431                         if (tmp_rdev == rdev)
 432                                 xflags |= XMIT_SAME_RDEV_pre28;
 433                         else
 434                                 rdev = tmp_rdev;
 435                 } else {
 436                         rdev = tmp_rdev;
 437                         if ((uint32)major(rdev) == rdev_major)
 438                                 xflags |= XMIT_SAME_RDEV_MAJOR;
 439                         else
 440                                 rdev_major = major(rdev);
 441                         if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu)
 442                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
 443                 }
 444         } else if (preserve_specials && IS_SPECIAL(mode) && protocol_version < 31) {
 445                 /* Special files don't need an rdev number, so just make
 446                  * the historical transmission of the value efficient. */
 447                 if (protocol_version < 28)
 448                         xflags |= XMIT_SAME_RDEV_pre28;
 449                 else {
 450                         rdev = MAKEDEV(major(rdev), 0);
 451                         xflags |= XMIT_SAME_RDEV_MAJOR;
 452                         if (protocol_version < 30)
 453                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
 454                 }
 455         } else if (protocol_version < 28)
 456                 rdev = MAKEDEV(0, 0);
 457         if (!preserve_uid || ((uid_t)F_OWNER(file) == uid && *lastname))
 458                 xflags |= XMIT_SAME_UID;
 459         else {
 460                 uid = F_OWNER(file);
 461                 if (!numeric_ids) {
 462                         user_name = add_uid(uid);
 463                         if (inc_recurse && user_name)
 464                                 xflags |= XMIT_USER_NAME_FOLLOWS;
 465                 }
 466         }
 467         if (!preserve_gid || ((gid_t)F_GROUP(file) == gid && *lastname))
 468                 xflags |= XMIT_SAME_GID;
 469         else {
 470                 gid = F_GROUP(file);
 471                 if (!numeric_ids) {
 472                         group_name = add_gid(gid);
 473                         if (inc_recurse && group_name)
 474                                 xflags |= XMIT_GROUP_NAME_FOLLOWS;
 475                 }
 476         }
 477         if (file->modtime == modtime)
 478                 xflags |= XMIT_SAME_TIME;
 479         else
 480                 modtime = file->modtime;
 481         if (NSEC_BUMP(file) && protocol_version >= 31)
 482                 xflags |= XMIT_MOD_NSEC;
 483         if (atimes_ndx && !S_ISDIR(mode)) {
 484                 if (F_ATIME(file) == atime)
 485                         xflags |= XMIT_SAME_ATIME;
 486                 else
 487                         atime = F_ATIME(file);
 488         }
 489
 490 #ifdef SUPPORT_HARD_LINKS
 491         if (tmp_dev != -1) {
 492                 if (protocol_version >= 30) {
 493                         struct ht_int64_node *np = idev_find(tmp_dev, tmp_ino);
 494                         first_hlink_ndx = (int32)(long)np->data - 1;
 495                         if (first_hlink_ndx < 0) {
 496                                 np->data = (void*)(long)(first_ndx + ndx + 1);
 497                                 xflags |= XMIT_HLINK_FIRST;
 498                         }
 499                         if (DEBUG_GTE(HLINK, 1)) {
 500                                 if (first_hlink_ndx >= 0) {
 501                                         rprintf(FINFO, "[%s] #%d hard-links #%d (%sabbrev)\n",
 502                                                 who_am_i(), first_ndx + ndx, first_hlink_ndx,
 503                                                 first_hlink_ndx >= first_ndx ? "" : "un");
 504                                 } else if (DEBUG_GTE(HLINK, 3)) {
 505                                         rprintf(FINFO, "[%s] dev:inode for #%d is %s:%s\n",
 506                                                 who_am_i(), first_ndx + ndx,
 507                                                 big_num(tmp_dev), big_num(tmp_ino));
 508                                 }
 509                         }
 510                 } else {
 511                         if (tmp_dev == dev) {
 512                                 if (protocol_version >= 28)
 513                                         xflags |= XMIT_SAME_DEV_pre30;
 514                         } else
 515                                 dev = tmp_dev;
 516                 }
 517                 xflags |= XMIT_HLINKED;
 518         }
 519 #endif
 520
 521         for (l1 = 0;
 522             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 523             l1++) {}
 524         l2 = strlen(fname+l1);
 525
 526         if (l1 > 0)
 527                 xflags |= XMIT_SAME_NAME;
 528         if (l2 > 255)
 529                 xflags |= XMIT_LONG_NAME;
 530
 531         /* We must avoid sending a flag value of 0 (or an initial byte of
 532          * 0 for the older xflags protocol) or it will signal the end of
 533          * the list.  Note that the use of XMIT_TOP_DIR on a non-dir has
 534          * no meaning, so it's a harmless way to add a bit to the first
 535          * flag byte. */
 536         if (xfer_flags_as_varint)
 537                 write_varint(f, xflags ? xflags : XMIT_EXTENDED_FLAGS);
 538         else if (protocol_version >= 28) {
 539                 if (!xflags && !S_ISDIR(mode))
 540                         xflags |= XMIT_TOP_DIR;
 541                 if ((xflags & 0xFF00) || !xflags) {
 542                         xflags |= XMIT_EXTENDED_FLAGS;
 543                         write_shortint(f, xflags);
 544                 } else
 545                         write_byte(f, xflags);
 546         } else {
 547                 if (!(xflags & 0xFF))
 548                         xflags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
 549                 write_byte(f, xflags);
 550         }
 551         if (xflags & XMIT_SAME_NAME)
 552                 write_byte(f, l1);
 553         if (xflags & XMIT_LONG_NAME)
 554                 write_varint30(f, l2);
 555         else
 556                 write_byte(f, l2);
 557         write_buf(f, fname + l1, l2);
 558
 559 #ifdef SUPPORT_HARD_LINKS
 560         if (first_hlink_ndx >= 0) {
 561                 write_varint(f, first_hlink_ndx);
 562                 if (first_hlink_ndx >= first_ndx)
 563                         goto the_end;
 564         }
 565 #endif
 566
 567         write_varlong30(f, F_LENGTH(file), 3);
 568         if (!(xflags & XMIT_SAME_TIME)) {
 569                 if (protocol_version >= 30)
 570                         write_varlong(f, modtime, 4);
 571                 else
 572                         write_int(f, modtime);
 573         }
 574         if (xflags & XMIT_MOD_NSEC)
 575                 write_varint(f, F_MOD_NSEC(file));
 576         if (!(xflags & XMIT_SAME_MODE))
 577                 write_int(f, to_wire_mode(mode));
 578         if (atimes_ndx && !S_ISDIR(mode) && !(xflags & XMIT_SAME_ATIME))
 579                 write_varlong(f, atime, 4);
 580         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
 581                 if (protocol_version < 30)
 582                         write_int(f, uid);
 583                 else {
 584                         write_varint(f, uid);
 585                         if (xflags & XMIT_USER_NAME_FOLLOWS) {
 586                                 int len = strlen(user_name);
 587                                 write_byte(f, len);
 588                                 write_buf(f, user_name, len);
 589                         }
 590                 }
 591         }
 592         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
 593                 if (protocol_version < 30)
 594                         write_int(f, gid);
 595                 else {
 596                         write_varint(f, gid);
 597                         if (xflags & XMIT_GROUP_NAME_FOLLOWS) {
 598                                 int len = strlen(group_name);
 599                                 write_byte(f, len);
 600                                 write_buf(f, group_name, len);
 601                         }
 602                 }
 603         }
 604         if ((preserve_devices && IS_DEVICE(mode))
 605          || (preserve_specials && IS_SPECIAL(mode) && protocol_version < 31)) {
 606                 if (protocol_version < 28) {
 607                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 608                                 write_int(f, (int)rdev);
 609                 } else {
 610                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 611                                 write_varint30(f, major(rdev));
 612                         if (protocol_version >= 30)
 613                                 write_varint(f, minor(rdev));
 614                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 615                                 write_byte(f, minor(rdev));
 616                         else
 617                                 write_int(f, minor(rdev));
 618                 }
 619         }
 620
 621 #ifdef SUPPORT_LINKS
 622         if (symlink_len) {
 623                 write_varint30(f, symlink_len);
 624                 write_buf(f, symlink_name, symlink_len);
 625         }
 626 #endif
 627
 628 #ifdef SUPPORT_HARD_LINKS
 629         if (tmp_dev != -1 && protocol_version < 30) {
 630                 /* Older protocols expect the dev number to be transmitted
 631                  * 1-incremented so that it is never zero. */
 632                 if (protocol_version < 26) {
 633                         /* 32-bit dev_t and ino_t */
 634                         write_int(f, (int32)(dev+1));
 635                         write_int(f, (int32)tmp_ino);
 636                 } else {
 637                         /* 64-bit dev_t and ino_t */
 638                         if (!(xflags & XMIT_SAME_DEV_pre30))
 639                                 write_longint(f, dev+1);
 640                         write_longint(f, tmp_ino);
 641                 }
 642         }
 643 #endif
 644
 645         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 646                 const char *sum;
 647                 if (S_ISREG(mode))
 648                         sum = tmp_sum;
 649                 else {
 650                         /* Prior to 28, we sent a useless set of nulls. */
 651                         sum = empty_sum;
 652                 }
 653                 write_buf(f, sum, flist_csum_len);
 654         }
 655
 656 #ifdef SUPPORT_HARD_LINKS
 657   the_end:
 658 #endif
 659         strlcpy(lastname, fname, MAXPATHLEN);
 660
 661         if (S_ISREG(mode) || S_ISLNK(mode))
 662                 stats.total_size += F_LENGTH(file);
 663 }
 664
 665 static struct file_struct *recv_file_entry(int f, struct file_list *flist, int xflags)
 666 {
 667         static int64 modtime, atime;
 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         uint32 modtime_nsec;
 688         const char *basename;
 689         struct file_struct *file;
 690         alloc_pool_t *pool;
 691         char *bp;
 692
 693         if (xflags & XMIT_SAME_NAME)
 694                 l1 = read_byte(f);
 695
 696         if (xflags & XMIT_LONG_NAME)
 697                 l2 = read_varint30(f);
 698         else
 699                 l2 = read_byte(f);
 700
 701         if (l2 >= MAXPATHLEN - l1) {
 702                 rprintf(FERROR,
 703                         "overflow: xflags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
 704                         xflags, l1, l2, lastname, who_am_i());
 705                 overflow_exit("recv_file_entry");
 706         }
 707
 708         strlcpy(thisname, lastname, l1 + 1);
 709         read_sbuf(f, &thisname[l1], l2);
 710         thisname[l1 + l2] = 0;
 711
 712         /* Abuse basename_len for a moment... */
 713         basename_len = strlcpy(lastname, thisname, MAXPATHLEN);
 714
 715 #ifdef ICONV_OPTION
 716         if (ic_recv != (iconv_t)-1) {
 717                 xbuf outbuf, inbuf;
 718
 719                 INIT_CONST_XBUF(outbuf, thisname);
 720                 INIT_XBUF(inbuf, lastname, basename_len, (size_t)-1);
 721
 722                 if (iconvbufs(ic_recv, &inbuf, &outbuf, ICB_INIT) < 0) {
 723                         io_error |= IOERR_GENERAL;
 724                         rprintf(FERROR_UTF8,
 725                             "[%s] cannot convert filename: %s (%s)\n",
 726                             who_am_i(), lastname, strerror(errno));
 727                         outbuf.len = 0;
 728                 }
 729                 thisname[outbuf.len] = '\0';
 730         }
 731 #endif
 732
 733         if (*thisname
 734          && (clean_fname(thisname, CFN_REFUSE_DOT_DOT_DIRS) < 0 || (!relative_paths && *thisname == '/'))) {
 735                 rprintf(FERROR, "ABORTING due to unsafe pathname from sender: %s\n", thisname);
 736                 exit_cleanup(RERR_PROTOCOL);
 737         }
 738
 739         if (sanitize_paths)
 740                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
 741
 742         if ((basename = strrchr(thisname, '/')) != NULL) {
 743                 int len = basename++ - thisname;
 744                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
 745                         lastdir = new_array(char, len + 1);
 746                         memcpy(lastdir, thisname, len);
 747                         lastdir[len] = '\0';
 748                         lastdir_len = len;
 749                         lastdir_depth = count_dir_elements(lastdir);
 750                 }
 751         } else
 752                 basename = thisname;
 753         basename_len = strlen(basename) + 1; /* count the '\0' */
 754
 755 #ifdef SUPPORT_HARD_LINKS
 756         if (protocol_version >= 30
 757          && BITS_SETnUNSET(xflags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
 758                 first_hlink_ndx = read_varint(f);
 759                 if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->ndx_start + flist->used) {
 760                         rprintf(FERROR,
 761                                 "hard-link reference out of range: %d (%d)\n",
 762                                 first_hlink_ndx, flist->ndx_start + flist->used);
 763                         exit_cleanup(RERR_PROTOCOL);
 764                 }
 765                 if (DEBUG_GTE(HLINK, 1)) {
 766                         rprintf(FINFO, "[%s] #%d hard-links #%d (%sabbrev)\n",
 767                                 who_am_i(), flist->used+flist->ndx_start, first_hlink_ndx,
 768                                 first_hlink_ndx >= flist->ndx_start ? "" : "un");
 769                 }
 770                 if (first_hlink_ndx >= flist->ndx_start) {
 771                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 772                         file_length = F_LENGTH(first);
 773                         modtime = first->modtime;
 774                         modtime_nsec = F_MOD_NSEC_or_0(first);
 775                         mode = first->mode;
 776                         if (atimes_ndx && !S_ISDIR(mode))
 777                                 atime = F_ATIME(first);
 778                         if (preserve_uid)
 779                                 uid = F_OWNER(first);
 780                         if (preserve_gid)
 781                                 gid = F_GROUP(first);
 782                         if (preserve_devices && IS_DEVICE(mode)) {
 783                                 uint32 *devp = F_RDEV_P(first);
 784                                 rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
 785                                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 786                         }
 787                         if (preserve_links && S_ISLNK(mode))
 788                                 linkname_len = strlen(F_SYMLINK(first)) + 1;
 789                         else
 790                                 linkname_len = 0;
 791                         goto create_object;
 792                 }
 793         }
 794 #endif
 795
 796         file_length = read_varlong30(f, 3);
 797         if (!(xflags & XMIT_SAME_TIME)) {
 798                 if (protocol_version >= 30) {
 799                         modtime = read_varlong(f, 4);
 800 #if SIZEOF_TIME_T < SIZEOF_INT64
 801                         if (!am_generator && (int64)(time_t)modtime != modtime) {
 802                                 rprintf(FERROR_XFER,
 803                                     "Time value of %s truncated on receiver.\n",
 804                                     lastname);
 805                         }
 806 #endif
 807                 } else
 808                         modtime = read_int(f);
 809         }
 810         if (xflags & XMIT_MOD_NSEC)
 811                 modtime_nsec = read_varint(f);
 812         else
 813                 modtime_nsec = 0;
 814         if (!(xflags & XMIT_SAME_MODE))
 815                 mode = from_wire_mode(read_int(f));
 816         if (atimes_ndx && !S_ISDIR(mode) && !(xflags & XMIT_SAME_ATIME)) {
 817                 atime = read_varlong(f, 4);
 818 #if SIZEOF_TIME_T < SIZEOF_INT64
 819                 if (!am_generator && (int64)(time_t)atime != atime) {
 820                         rprintf(FERROR_XFER,
 821                                 "Access time value of %s truncated on receiver.\n",
 822                                 lastname);
 823                 }
 824 #endif
 825         }
 826
 827         if (chmod_modes && !S_ISLNK(mode) && mode)
 828                 mode = tweak_mode(mode, chmod_modes);
 829
 830         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
 831                 if (protocol_version < 30)
 832                         uid = (uid_t)read_int(f);
 833                 else {
 834                         uid = (uid_t)read_varint(f);
 835                         if (xflags & XMIT_USER_NAME_FOLLOWS)
 836                                 uid = recv_user_name(f, uid);
 837                         else if (inc_recurse && am_root && (!numeric_ids || usermap))
 838                                 uid = match_uid(uid);
 839                 }
 840         }
 841         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
 842                 if (protocol_version < 30)
 843                         gid = (gid_t)read_int(f);
 844                 else {
 845                         gid = (gid_t)read_varint(f);
 846                         gid_flags = 0;
 847                         if (xflags & XMIT_GROUP_NAME_FOLLOWS)
 848                                 gid = recv_group_name(f, gid, &gid_flags);
 849                         else if (inc_recurse && (!am_root || !numeric_ids || groupmap))
 850                                 gid = match_gid(gid, &gid_flags);
 851                 }
 852         }
 853
 854         if ((preserve_devices && IS_DEVICE(mode))
 855          || (preserve_specials && IS_SPECIAL(mode) && protocol_version < 31)) {
 856                 if (protocol_version < 28) {
 857                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 858                                 rdev = (dev_t)read_int(f);
 859                 } else {
 860                         uint32 rdev_minor;
 861                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 862                                 rdev_major = read_varint30(f);
 863                         if (protocol_version >= 30)
 864                                 rdev_minor = read_varint(f);
 865                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 866                                 rdev_minor = read_byte(f);
 867                         else
 868                                 rdev_minor = read_int(f);
 869                         rdev = MAKEDEV(rdev_major, rdev_minor);
 870                 }
 871                 if (IS_DEVICE(mode))
 872                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 873                 file_length = 0;
 874         } else if (protocol_version < 28)
 875                 rdev = MAKEDEV(0, 0);
 876
 877 #ifdef SUPPORT_LINKS
 878         if (preserve_links && S_ISLNK(mode)) {
 879                 linkname_len = read_varint30(f) + 1; /* count the '\0' */
 880                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 881                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 882                                 linkname_len - 1);
 883                         overflow_exit("recv_file_entry");
 884                 }
 885 #ifdef ICONV_OPTION
 886                 /* We don't know how much extra room we need to convert
 887                  * the as-yet-unread symlink data, so let's hope that a
 888                  * double-size buffer is plenty. */
 889                 if (sender_symlink_iconv)
 890                         linkname_len *= 2;
 891 #endif
 892                 if (munge_symlinks)
 893                         linkname_len += SYMLINK_PREFIX_LEN;
 894         }
 895         else
 896 #endif
 897                 linkname_len = 0;
 898
 899 #ifdef SUPPORT_HARD_LINKS
 900   create_object:
 901         if (preserve_hard_links) {
 902                 if (protocol_version < 28 && S_ISREG(mode))
 903                         xflags |= XMIT_HLINKED;
 904                 if (xflags & XMIT_HLINKED)
 905                         extra_len += (inc_recurse+1) * EXTRA_LEN;
 906         }
 907 #endif
 908
 909 #ifdef SUPPORT_ACLS
 910         /* Directories need an extra int32 for the default ACL. */
 911         if (preserve_acls && S_ISDIR(mode))
 912                 extra_len += EXTRA_LEN;
 913 #endif
 914
 915         if (always_checksum && S_ISREG(mode))
 916                 extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
 917
 918 #if SIZEOF_INT64 >= 8
 919         if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
 920                 extra_len += EXTRA_LEN;
 921 #endif
 922 #ifdef CAN_SET_NSEC
 923         if (modtime_nsec)
 924                 extra_len += EXTRA_LEN;
 925 #endif
 926         if (file_length < 0) {
 927                 rprintf(FERROR, "Offset underflow: file-length is negative\n");
 928                 exit_cleanup(RERR_UNSUPPORTED);
 929         }
 930
 931         if (inc_recurse && S_ISDIR(mode)) {
 932                 if (one_file_system) {
 933                         /* Room to save the dir's device for -x */
 934                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 935                 }
 936                 pool = dir_flist->file_pool;
 937         } else
 938                 pool = flist->file_pool;
 939
 940 #if EXTRA_ROUNDING > 0
 941         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
 942                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
 943 #endif
 944
 945         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
 946                   + linkname_len;
 947         bp = pool_alloc(pool, alloc_len, "recv_file_entry");
 948
 949         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
 950         bp += extra_len;
 951         file = (struct file_struct *)bp;
 952         bp += FILE_STRUCT_LEN;
 953
 954         memcpy(bp, basename, basename_len);
 955
 956 #ifdef SUPPORT_HARD_LINKS
 957         if (xflags & XMIT_HLINKED
 958 #ifndef CAN_HARDLINK_SYMLINK
 959          && !S_ISLNK(mode)
 960 #endif
 961 #ifndef CAN_HARDLINK_SPECIAL
 962          && !IS_SPECIAL(mode) && !IS_DEVICE(mode)
 963 #endif
 964         )
 965                 file->flags |= FLAG_HLINKED;
 966 #endif
 967         file->modtime = (time_t)modtime;
 968 #ifdef CAN_SET_NSEC
 969         if (modtime_nsec) {
 970                 file->flags |= FLAG_MOD_NSEC;
 971                 F_MOD_NSEC(file) = modtime_nsec;
 972         }
 973 #endif
 974         file->len32 = (uint32)file_length;
 975 #if SIZEOF_INT64 >= 8
 976         if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
 977 #if SIZEOF_CAPITAL_OFF_T < 8
 978                 rprintf(FERROR, "Offset overflow: attempted 64-bit file-length\n");
 979                 exit_cleanup(RERR_UNSUPPORTED);
 980 #else
 981                 file->flags |= FLAG_LENGTH64;
 982                 F_HIGH_LEN(file) = (uint32)(file_length >> 32);
 983 #endif
 984         }
 985 #endif
 986         file->mode = mode;
 987         if (preserve_uid)
 988                 F_OWNER(file) = uid;
 989         if (preserve_gid) {
 990                 F_GROUP(file) = gid;
 991                 file->flags |= gid_flags;
 992         }
 993         if (atimes_ndx && !S_ISDIR(mode))
 994                 F_ATIME(file) = atime;
 995         if (unsort_ndx)
 996                 F_NDX(file) = flist->used + flist->ndx_start;
 997
 998         if (basename != thisname) {
 999                 file->dirname = lastdir;
1000                 F_DEPTH(file) = lastdir_depth + 1;
1001         } else
1002                 F_DEPTH(file) = 1;
1003
1004         if (S_ISDIR(mode)) {
1005                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
1006                         F_DEPTH(file)--;
1007                 if (protocol_version >= 30) {
1008                         if (!(xflags & XMIT_NO_CONTENT_DIR)) {
1009                                 if (xflags & XMIT_TOP_DIR)
1010                                         file->flags |= FLAG_TOP_DIR;
1011                                 file->flags |= FLAG_CONTENT_DIR;
1012                         } else if (xflags & XMIT_TOP_DIR)
1013                                 file->flags |= FLAG_IMPLIED_DIR;
1014                 } else if (xflags & XMIT_TOP_DIR) {
1015                         in_del_hier = recurse;
1016                         del_hier_name_len = F_DEPTH(file) == 0 ? 0 : l1 + l2;
1017                         if (relative_paths && del_hier_name_len > 2
1018                             && lastname[del_hier_name_len-1] == '.'
1019                             && lastname[del_hier_name_len-2] == '/')
1020                                 del_hier_name_len -= 2;
1021                         file->flags |= FLAG_TOP_DIR | FLAG_CONTENT_DIR;
1022                 } else if (in_del_hier) {
1023                         if (!relative_paths || !del_hier_name_len
1024                          || (l1 >= del_hier_name_len
1025                           && lastname[del_hier_name_len] == '/'))
1026                                 file->flags |= FLAG_CONTENT_DIR;
1027                         else
1028                                 in_del_hier = 0;
1029                 }
1030         }
1031
1032         if (preserve_devices && IS_DEVICE(mode)) {
1033                 uint32 *devp = F_RDEV_P(file);
1034                 DEV_MAJOR(devp) = major(rdev);
1035                 DEV_MINOR(devp) = minor(rdev);
1036         }
1037
1038 #ifdef SUPPORT_LINKS
1039         if (linkname_len) {
1040                 bp += basename_len;
1041                 if (first_hlink_ndx >= flist->ndx_start) {
1042                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
1043                         memcpy(bp, F_SYMLINK(first), linkname_len);
1044                 } else {
1045                         if (munge_symlinks) {
1046                                 strlcpy(bp, SYMLINK_PREFIX, linkname_len);
1047                                 bp += SYMLINK_PREFIX_LEN;
1048                                 linkname_len -= SYMLINK_PREFIX_LEN;
1049                         }
1050 #ifdef ICONV_OPTION
1051                         if (sender_symlink_iconv) {
1052                                 xbuf outbuf, inbuf;
1053
1054                                 alloc_len = linkname_len;
1055                                 linkname_len /= 2;
1056
1057                                 /* Read the symlink data into the end of our double-sized
1058                                  * buffer and then convert it into the right spot. */
1059                                 INIT_XBUF(inbuf, bp + alloc_len - linkname_len,
1060                                           linkname_len - 1, (size_t)-1);
1061                                 read_sbuf(f, inbuf.buf, inbuf.len);
1062                                 INIT_XBUF(outbuf, bp, 0, alloc_len);
1063
1064                                 if (iconvbufs(ic_recv, &inbuf, &outbuf, ICB_INIT) < 0) {
1065                                         io_error |= IOERR_GENERAL;
1066                                         rprintf(FERROR_XFER,
1067                                             "[%s] cannot convert symlink data for: %s (%s)\n",
1068                                             who_am_i(), full_fname(thisname), strerror(errno));
1069                                         bp = (char*)file->basename;
1070                                         *bp++ = '\0';
1071                                         outbuf.len = 0;
1072                                 }
1073                                 bp[outbuf.len] = '\0';
1074                         } else
1075 #endif
1076                                 read_sbuf(f, bp, linkname_len - 1);
1077                         if (sanitize_paths && !munge_symlinks && *bp)
1078                                 sanitize_path(bp, bp, "", lastdir_depth, SP_DEFAULT);
1079                 }
1080         }
1081 #endif
1082
1083 #ifdef SUPPORT_HARD_LINKS
1084         if (preserve_hard_links && xflags & XMIT_HLINKED) {
1085                 if (protocol_version >= 30) {
1086                         if (xflags & XMIT_HLINK_FIRST) {
1087                                 F_HL_GNUM(file) = flist->ndx_start + flist->used;
1088                         } else
1089                                 F_HL_GNUM(file) = first_hlink_ndx;
1090                 } else {
1091                         static int32 cnt = 0;
1092                         struct ht_int64_node *np;
1093                         int64 ino;
1094                         int32 ndx;
1095                         if (protocol_version < 26) {
1096                                 dev = read_int(f);
1097                                 ino = read_int(f);
1098                         } else {
1099                                 if (!(xflags & XMIT_SAME_DEV_pre30))
1100                                         dev = read_longint(f);
1101                                 ino = read_longint(f);
1102                         }
1103                         np = idev_find(dev, ino);
1104                         ndx = (int32)(long)np->data - 1;
1105                         if (ndx < 0) {
1106                                 ndx = cnt++;
1107                                 np->data = (void*)(long)cnt;
1108                         }
1109                         F_HL_GNUM(file) = ndx;
1110                 }
1111         }
1112 #endif
1113
1114         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
1115                 if (S_ISREG(mode))
1116                         bp = F_SUM(file);
1117                 else {
1118                         /* Prior to 28, we get a useless set of nulls. */
1119                         bp = tmp_sum;
1120                 }
1121                 if (first_hlink_ndx >= flist->ndx_start) {
1122                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
1123                         memcpy(bp, F_SUM(first), flist_csum_len);
1124                 } else
1125                         read_buf(f, bp, flist_csum_len);
1126         }
1127
1128 #ifdef SUPPORT_ACLS
1129         if (preserve_acls && !S_ISLNK(mode))
1130                 receive_acl(f, file);
1131 #endif
1132 #ifdef SUPPORT_XATTRS
1133         if (preserve_xattrs)
1134                 receive_xattr(f, file);
1135 #endif
1136
1137         if (S_ISREG(mode) || S_ISLNK(mode))
1138                 stats.total_size += file_length;
1139
1140         return file;
1141 }
1142
1143 /* Create a file_struct for a named file by reading its stat() information
1144  * and performing extensive checks against global options.
1145  *
1146  * Returns a pointer to the new file struct, or NULL if there was an error
1147  * or this file should be excluded.
1148  *
1149  * Note: Any error (here or in send_file_name) that results in the omission of
1150  * an existent source file from the file list should set
1151  * "io_error |= IOERR_GENERAL" to avoid deletion of the file from the
1152  * destination if --delete is on. */
1153 struct file_struct *make_file(const char *fname, struct file_list *flist,
1154                               STRUCT_STAT *stp, int flags, int filter_level)
1155 {
1156         static char *lastdir;
1157         static int lastdir_len = -1;
1158         struct file_struct *file;
1159         char thisname[MAXPATHLEN];
1160         char linkname[MAXPATHLEN];
1161         int alloc_len, basename_len, linkname_len;
1162         int extra_len = file_extra_cnt * EXTRA_LEN;
1163         const char *basename;
1164         alloc_pool_t *pool;
1165         STRUCT_STAT st;
1166         char *bp;
1167
1168         if (strlcpy(thisname, fname, sizeof thisname) >= sizeof thisname) {
1169                 io_error |= IOERR_GENERAL;
1170                 rprintf(FERROR_XFER, "skipping overly long name: %s\n", fname);
1171                 return NULL;
1172         }
1173         clean_fname(thisname, 0);
1174         if (sanitize_paths)
1175                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
1176
1177         if (stp && (S_ISDIR(stp->st_mode) || IS_MISSING_FILE(*stp))) {
1178                 /* This is needed to handle a "symlink/." with a --relative
1179                  * dir, or a request to delete a specific file. */
1180                 st = *stp;
1181                 *linkname = '\0'; /* make IBM code checker happy */
1182         } else if (readlink_stat(thisname, &st, linkname) != 0) {
1183                 int save_errno = errno;
1184                 /* See if file is excluded before reporting an error. */
1185                 if (filter_level != NO_FILTERS
1186                  && (is_excluded(thisname, 0, filter_level)
1187                   || is_excluded(thisname, 1, filter_level))) {
1188                         if (ignore_perishable && save_errno != ENOENT)
1189                                 non_perishable_cnt++;
1190                         return NULL;
1191                 }
1192                 if (save_errno == ENOENT) {
1193 #ifdef SUPPORT_LINKS
1194                         /* When our options tell us to follow a symlink that
1195                          * points nowhere, tell the user about the symlink
1196                          * instead of giving a "vanished" message.  We only
1197                          * dereference a symlink if one of the --copy*links
1198                          * options was specified, so there's no need for the
1199                          * extra lstat() if one of these options isn't on. */
1200                         if ((copy_links || copy_unsafe_links || copy_dirlinks)
1201                          && x_lstat(thisname, &st, NULL) == 0
1202                          && S_ISLNK(st.st_mode)) {
1203                                 io_error |= IOERR_GENERAL;
1204                                 rprintf(FERROR_XFER, "symlink has no referent: %s\n",
1205                                         full_fname(thisname));
1206                         } else
1207 #endif
1208                         {
1209                                 enum logcode c = am_daemon && protocol_version < 28
1210                                                ? FERROR : FWARNING;
1211                                 io_error |= IOERR_VANISHED;
1212                                 rprintf(c, "file has vanished: %s\n",
1213                                         full_fname(thisname));
1214                         }
1215                 } else {
1216                         io_error |= IOERR_GENERAL;
1217                         rsyserr(FERROR_XFER, save_errno, "readlink_stat(%s) failed",
1218                                 full_fname(thisname));
1219                 }
1220                 return NULL;
1221         } else if (IS_MISSING_FILE(st)) {
1222                 io_error |= IOERR_GENERAL;
1223                 rprintf(FINFO, "skipping file with bogus (zero) st_mode: %s\n",
1224                         full_fname(thisname));
1225                 return NULL;
1226         }
1227
1228         if (filter_level == NO_FILTERS)
1229                 goto skip_filters;
1230
1231         if (S_ISDIR(st.st_mode)) {
1232                 if (!xfer_dirs) {
1233                         rprintf(FINFO, "skipping directory %s\n", thisname);
1234                         return NULL;
1235                 }
1236                 /* -x only affects dirs because we need to avoid recursing
1237                  * into a mount-point directory, not to avoid copying a
1238                  * symlinked file if -L (or similar) was specified. */
1239                 if (one_file_system && st.st_dev != filesystem_dev
1240                  && BITS_SETnUNSET(flags, FLAG_CONTENT_DIR, FLAG_TOP_DIR)) {
1241                         if (one_file_system > 1) {
1242                                 if (INFO_GTE(MOUNT, 1)) {
1243                                         rprintf(FINFO,
1244                                             "[%s] skipping mount-point dir %s\n",
1245                                             who_am_i(), thisname);
1246                                 }
1247                                 return NULL;
1248                         }
1249                         flags |= FLAG_MOUNT_DIR;
1250                         flags &= ~FLAG_CONTENT_DIR;
1251                 }
1252         } else
1253                 flags &= ~FLAG_CONTENT_DIR;
1254
1255         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level)) {
1256                 if (ignore_perishable)
1257                         non_perishable_cnt++;
1258                 return NULL;
1259         }
1260
1261         if (lp_ignore_nonreadable(module_id)) {
1262 #ifdef SUPPORT_LINKS
1263                 if (!S_ISLNK(st.st_mode))
1264 #endif
1265                         if (access(thisname, R_OK) != 0)
1266                                 return NULL;
1267         }
1268
1269   skip_filters:
1270
1271         /* Only divert a directory in the main transfer. */
1272         if (flist) {
1273                 if (flist->prev && S_ISDIR(st.st_mode)
1274                  && flags & FLAG_DIVERT_DIRS) {
1275                         /* Room for parent/sibling/next-child info. */
1276                         extra_len += DIRNODE_EXTRA_CNT * EXTRA_LEN;
1277                         if (relative_paths)
1278                                 extra_len += PTR_EXTRA_CNT * EXTRA_LEN;
1279                         pool = dir_flist->file_pool;
1280                 } else
1281                         pool = flist->file_pool;
1282         } else {
1283 #ifdef SUPPORT_ACLS
1284                 /* Directories need an extra int32 for the default ACL. */
1285                 if (preserve_acls && S_ISDIR(st.st_mode))
1286                         extra_len += EXTRA_LEN;
1287 #endif
1288                 pool = NULL;
1289         }
1290
1291         if (DEBUG_GTE(FLIST, 2)) {
1292                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
1293                         who_am_i(), thisname, filter_level);
1294         }
1295
1296         if ((basename = strrchr(thisname, '/')) != NULL) {
1297                 int len = basename++ - thisname;
1298                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
1299                         lastdir = new_array(char, len + 1);
1300                         memcpy(lastdir, thisname, len);
1301                         lastdir[len] = '\0';
1302                         lastdir_len = len;
1303                 }
1304         } else
1305                 basename = thisname;
1306         basename_len = strlen(basename) + 1; /* count the '\0' */
1307
1308 #ifdef SUPPORT_LINKS
1309         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
1310 #else
1311         linkname_len = 0;
1312 #endif
1313
1314 #ifdef ST_MTIME_NSEC
1315         if (st.ST_MTIME_NSEC && protocol_version >= 31)
1316                 extra_len += EXTRA_LEN;
1317 #endif
1318 #if SIZEOF_CAPITAL_OFF_T >= 8
1319         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
1320                 extra_len += EXTRA_LEN;
1321 #endif
1322
1323         if (always_checksum && am_sender && S_ISREG(st.st_mode)) {
1324                 file_checksum(thisname, &st, tmp_sum);
1325                 if (sender_keeps_checksum)
1326                         extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
1327         }
1328
1329 #if EXTRA_ROUNDING > 0
1330         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
1331                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
1332 #endif
1333
1334         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
1335                   + linkname_len;
1336         if (pool)
1337                 bp = pool_alloc(pool, alloc_len, "make_file");
1338         else {
1339                 if (!(bp = new_array(char, alloc_len)))
1340                         out_of_memory("make_file");
1341         }
1342
1343         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
1344         bp += extra_len;
1345         file = (struct file_struct *)bp;
1346         bp += FILE_STRUCT_LEN;
1347
1348         memcpy(bp, basename, basename_len);
1349
1350 #ifdef SUPPORT_HARD_LINKS
1351         if (preserve_hard_links && flist && flist->prev) {
1352                 if (protocol_version >= 28
1353                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
1354                  : S_ISREG(st.st_mode)) {
1355                         tmp_dev = (int64)st.st_dev;
1356                         tmp_ino = (int64)st.st_ino;
1357                 } else
1358                         tmp_dev = -1;
1359         }
1360 #endif
1361
1362 #ifdef HAVE_STRUCT_STAT_ST_RDEV
1363         if (IS_DEVICE(st.st_mode)) {
1364                 tmp_rdev = st.st_rdev;
1365                 st.st_size = 0;
1366         } else if (IS_SPECIAL(st.st_mode))
1367                 st.st_size = 0;
1368 #endif
1369
1370         file->flags = flags;
1371         file->modtime = st.st_mtime;
1372 #ifdef ST_MTIME_NSEC
1373         if (st.ST_MTIME_NSEC && protocol_version >= 31) {
1374                 file->flags |= FLAG_MOD_NSEC;
1375                 F_MOD_NSEC(file) = st.ST_MTIME_NSEC;
1376         }
1377 #endif
1378         file->len32 = (uint32)st.st_size;
1379 #if SIZEOF_CAPITAL_OFF_T >= 8
1380         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
1381                 file->flags |= FLAG_LENGTH64;
1382                 F_HIGH_LEN(file) = (uint32)(st.st_size >> 32);
1383         }
1384 #endif
1385         file->mode = st.st_mode;
1386         if (preserve_uid)
1387                 F_OWNER(file) = st.st_uid;
1388         if (preserve_gid)
1389                 F_GROUP(file) = st.st_gid;
1390         if (am_generator && st.st_uid == our_uid)
1391                 file->flags |= FLAG_OWNED_BY_US;
1392         if (atimes_ndx && !S_ISDIR(file->mode))
1393                 F_ATIME(file) = st.st_atime;
1394
1395         if (basename != thisname)
1396                 file->dirname = lastdir;
1397
1398 #ifdef SUPPORT_LINKS
1399         if (linkname_len)
1400                 memcpy(bp + basename_len, linkname, linkname_len);
1401 #endif
1402
1403         if (am_sender)
1404                 F_PATHNAME(file) = pathname;
1405         else if (!pool)
1406                 F_DEPTH(file) = extra_len / EXTRA_LEN;
1407
1408         if (basename_len == 0+1) {
1409                 if (!pool)
1410                         unmake_file(file);
1411                 return NULL;
1412         }
1413
1414         if (sender_keeps_checksum && S_ISREG(st.st_mode))
1415                 memcpy(F_SUM(file), tmp_sum, flist_csum_len);
1416
1417         if (unsort_ndx)
1418                 F_NDX(file) = stats.num_dirs;
1419
1420         return file;
1421 }
1422
1423 OFF_T get_device_size(int fd, const char *fname)
1424 {
1425         OFF_T off = lseek(fd, 0, SEEK_END);
1426
1427         if (off == (OFF_T) -1) {
1428                 rsyserr(FERROR, errno, "failed to get device size via seek: %s", fname);
1429                 return 0;
1430         }
1431         if (lseek(fd, 0, SEEK_SET) != 0)
1432                 rsyserr(FERROR, errno, "failed to seek device back to start: %s", fname);
1433
1434         return off;
1435 }
1436
1437 /* Only called for temporary file_struct entries created by make_file(). */
1438 void unmake_file(struct file_struct *file)
1439 {
1440         free(REQ_EXTRA(file, F_DEPTH(file)));
1441 }
1442
1443 static struct file_struct *send_file_name(int f, struct file_list *flist,
1444                                           const char *fname, STRUCT_STAT *stp,
1445                                           int flags, int filter_level)
1446 {
1447         struct file_struct *file;
1448
1449         file = make_file(fname, flist, stp, flags, filter_level);
1450         if (!file)
1451                 return NULL;
1452
1453         if (chmod_modes && !S_ISLNK(file->mode) && file->mode)
1454                 file->mode = tweak_mode(file->mode, chmod_modes);
1455
1456         if (f >= 0) {
1457                 char fbuf[MAXPATHLEN];
1458 #ifdef SUPPORT_LINKS
1459                 const char *symlink_name;
1460                 int symlink_len;
1461 #ifdef ICONV_OPTION
1462                 char symlink_buf[MAXPATHLEN];
1463 #endif
1464 #endif
1465 #if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
1466                 stat_x sx;
1467                 init_stat_x(&sx);
1468 #endif
1469
1470 #ifdef SUPPORT_LINKS
1471                 if (preserve_links && S_ISLNK(file->mode)) {
1472                         symlink_name = F_SYMLINK(file);
1473                         symlink_len = strlen(symlink_name);
1474                         if (symlink_len == 0) {
1475                                 io_error |= IOERR_GENERAL;
1476                                 f_name(file, fbuf);
1477                                 rprintf(FERROR_XFER,
1478                                     "skipping symlink with 0-length value: %s\n",
1479                                     full_fname(fbuf));
1480                                 return NULL;
1481                         }
1482                 } else {
1483                         symlink_name = NULL;
1484                         symlink_len = 0;
1485                 }
1486 #endif
1487
1488 #ifdef ICONV_OPTION
1489                 if (ic_send != (iconv_t)-1) {
1490                         xbuf outbuf, inbuf;
1491
1492                         INIT_CONST_XBUF(outbuf, fbuf);
1493
1494                         if (file->dirname) {
1495                                 INIT_XBUF_STRLEN(inbuf, (char*)file->dirname);
1496                                 outbuf.size -= 2; /* Reserve room for '/' & 1 more char. */
1497                                 if (iconvbufs(ic_send, &inbuf, &outbuf, ICB_INIT) < 0)
1498                                         goto convert_error;
1499                                 outbuf.size += 2;
1500                                 fbuf[outbuf.len++] = '/';
1501                         }
1502
1503                         INIT_XBUF_STRLEN(inbuf, (char*)file->basename);
1504                         if (iconvbufs(ic_send, &inbuf, &outbuf, ICB_INIT) < 0) {
1505                           convert_error:
1506                                 io_error |= IOERR_GENERAL;
1507                                 rprintf(FERROR_XFER,
1508                                     "[%s] cannot convert filename: %s (%s)\n",
1509                                     who_am_i(), f_name(file, fbuf), strerror(errno));
1510                                 return NULL;
1511                         }
1512                         fbuf[outbuf.len] = '\0';
1513
1514 #ifdef SUPPORT_LINKS
1515                         if (symlink_len && sender_symlink_iconv) {
1516                                 INIT_XBUF(inbuf, (char*)symlink_name, symlink_len, (size_t)-1);
1517                                 INIT_CONST_XBUF(outbuf, symlink_buf);
1518                                 if (iconvbufs(ic_send, &inbuf, &outbuf, ICB_INIT) < 0) {
1519                                         io_error |= IOERR_GENERAL;
1520                                         f_name(file, fbuf);
1521                                         rprintf(FERROR_XFER,
1522                                             "[%s] cannot convert symlink data for: %s (%s)\n",
1523                                             who_am_i(), full_fname(fbuf), strerror(errno));
1524                                         return NULL;
1525                                 }
1526                                 symlink_buf[outbuf.len] = '\0';
1527
1528                                 symlink_name = symlink_buf;
1529                                 symlink_len = outbuf.len;
1530                         }
1531 #endif
1532                 } else
1533 #endif
1534                         f_name(file, fbuf);
1535
1536 #ifdef SUPPORT_ACLS
1537                 if (preserve_acls && !S_ISLNK(file->mode)) {
1538                         sx.st.st_mode = file->mode;
1539                         if (get_acl(fname, &sx) < 0) {
1540                                 io_error |= IOERR_GENERAL;
1541                                 return NULL;
1542                         }
1543                 }
1544 #endif
1545 #ifdef SUPPORT_XATTRS
1546                 if (preserve_xattrs) {
1547                         sx.st.st_mode = file->mode;
1548                         if (get_xattr(fname, &sx) < 0) {
1549                                 io_error |= IOERR_GENERAL;
1550                                 return NULL;
1551                         }
1552                 }
1553 #endif
1554
1555                 send_file_entry(f, fbuf, file,
1556 #ifdef SUPPORT_LINKS
1557                                 symlink_name, symlink_len,
1558 #endif
1559                                 flist->used, flist->ndx_start);
1560
1561 #ifdef SUPPORT_ACLS
1562                 if (preserve_acls && !S_ISLNK(file->mode)) {
1563                         send_acl(f, &sx);
1564                         free_acl(&sx);
1565                 }
1566 #endif
1567 #ifdef SUPPORT_XATTRS
1568                 if (preserve_xattrs) {
1569                         F_XATTR(file) = send_xattr(f, &sx);
1570                         free_xattr(&sx);
1571                 }
1572 #endif
1573         }
1574
1575         maybe_emit_filelist_progress(flist->used + flist_count_offset);
1576
1577         flist_expand(flist, 1);
1578         flist->files[flist->used++] = file;
1579
1580         return file;
1581 }
1582
1583 static void send_if_directory(int f, struct file_list *flist,
1584                               struct file_struct *file,
1585                               char *fbuf, unsigned int ol,
1586                               int flags)
1587 {
1588         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1589
1590         if (S_ISDIR(file->mode)
1591             && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) {
1592                 void *save_filters;
1593                 unsigned int len = strlen(fbuf);
1594                 if (len > 1 && fbuf[len-1] == '/')
1595                         fbuf[--len] = '\0';
1596                 save_filters = push_local_filters(fbuf, len);
1597                 send_directory(f, flist, fbuf, len, flags);
1598                 pop_local_filters(save_filters);
1599                 fbuf[ol] = '\0';
1600                 if (is_dot_dir)
1601                         fbuf[ol-1] = '.';
1602         }
1603 }
1604
1605 static int file_compare(const void *file1, const void *file2)
1606 {
1607         return f_name_cmp(*(struct file_struct **)file1,
1608                           *(struct file_struct **)file2);
1609 }
1610
1611 /* The guts of a merge-sort algorithm.  This was derived from the glibc
1612  * version, but I (Wayne) changed the merge code to do less copying and
1613  * to require only half the amount of temporary memory. */
1614 static void fsort_tmp(struct file_struct **fp, size_t num,
1615                       struct file_struct **tmp)
1616 {
1617         struct file_struct **f1, **f2, **t;
1618         size_t n1, n2;
1619
1620         n1 = num / 2;
1621         n2 = num - n1;
1622         f1 = fp;
1623         f2 = fp + n1;
1624
1625         if (n1 > 1)
1626                 fsort_tmp(f1, n1, tmp);
1627         if (n2 > 1)
1628                 fsort_tmp(f2, n2, tmp);
1629
1630         while (f_name_cmp(*f1, *f2) <= 0) {
1631                 if (!--n1)
1632                         return;
1633                 f1++;
1634         }
1635
1636         t = tmp;
1637         memcpy(t, f1, n1 * PTR_SIZE);
1638
1639         *f1++ = *f2++, n2--;
1640
1641         while (n1 > 0 && n2 > 0) {
1642                 if (f_name_cmp(*t, *f2) <= 0)
1643                         *f1++ = *t++, n1--;
1644                 else
1645                         *f1++ = *f2++, n2--;
1646         }
1647
1648         if (n1 > 0)
1649                 memcpy(f1, t, n1 * PTR_SIZE);
1650 }
1651
1652 /* This file-struct sorting routine makes sure that any identical names in
1653  * the file list stay in the same order as they were in the original list.
1654  * This is particularly vital in inc_recurse mode where we expect a sort
1655  * on the flist to match the exact order of a sort on the dir_flist. */
1656 static void fsort(struct file_struct **fp, size_t num)
1657 {
1658         if (num <= 1)
1659                 return;
1660
1661         if (use_qsort)
1662                 qsort(fp, num, PTR_SIZE, file_compare);
1663         else {
1664                 struct file_struct **tmp = new_array(struct file_struct *,
1665                                                      (num+1) / 2);
1666                 fsort_tmp(fp, num, tmp);
1667                 free(tmp);
1668         }
1669 }
1670
1671 /* We take an entire set of sibling dirs from the sorted flist and link them
1672  * into the tree, setting the appropriate parent/child/sibling pointers. */
1673 static void add_dirs_to_tree(int parent_ndx, struct file_list *from_flist,
1674                              int dir_cnt)
1675 {
1676         int i;
1677         int32 *dp = NULL;
1678         int32 *parent_dp = parent_ndx < 0 ? NULL
1679                          : F_DIR_NODE_P(dir_flist->sorted[parent_ndx]);
1680
1681         /* The sending side is adding entries to dir_flist in sorted order, so sorted & files are the same. */
1682         flist_expand(dir_flist, dir_cnt);
1683         dir_flist->sorted = dir_flist->files;
1684
1685         for (i = 0; dir_cnt; i++) {
1686                 struct file_struct *file = from_flist->sorted[i];
1687
1688                 if (!S_ISDIR(file->mode))
1689                         continue;
1690
1691                 dir_flist->files[dir_flist->used++] = file;
1692                 dir_cnt--;
1693
1694                 if (file->basename[0] == '.' && file->basename[1] == '\0')
1695                         continue;
1696
1697                 if (dp)
1698                         DIR_NEXT_SIBLING(dp) = dir_flist->used - 1;
1699                 else if (parent_dp)
1700                         DIR_FIRST_CHILD(parent_dp) = dir_flist->used - 1;
1701                 else
1702                         send_dir_ndx = dir_flist->used - 1;
1703
1704                 dp = F_DIR_NODE_P(file);
1705                 DIR_PARENT(dp) = parent_ndx;
1706                 DIR_FIRST_CHILD(dp) = -1;
1707         }
1708         if (dp)
1709                 DIR_NEXT_SIBLING(dp) = -1;
1710 }
1711
1712 static void interpret_stat_error(const char *fname, int is_dir)
1713 {
1714         if (errno == ENOENT) {
1715                 io_error |= IOERR_VANISHED;
1716                 rprintf(FWARNING, "%s has vanished: %s\n",
1717                         is_dir ? "directory" : "file", full_fname(fname));
1718         } else {
1719                 io_error |= IOERR_GENERAL;
1720                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1721                         full_fname(fname));
1722         }
1723 }
1724
1725 /* This function is normally called by the sender, but the receiving side also
1726  * calls it from get_dirlist() with f set to -1 so that we just construct the
1727  * file list in memory without sending it over the wire.  Also, get_dirlist()
1728  * might call this with f set to -2, which also indicates that local filter
1729  * rules should be ignored. */
1730 static void send_directory(int f, struct file_list *flist, char *fbuf, int len,
1731                            int flags)
1732 {
1733         struct dirent *di;
1734         unsigned remainder;
1735         char *p;
1736         DIR *d;
1737         int divert_dirs = (flags & FLAG_DIVERT_DIRS) != 0;
1738         int start = flist->used;
1739         int filter_level = f == -2 ? SERVER_FILTERS : ALL_FILTERS;
1740
1741         assert(flist != NULL);
1742
1743         if (!(d = opendir(fbuf))) {
1744                 if (errno == ENOENT) {
1745                         if (am_sender) /* Can abuse this for vanished error w/ENOENT: */
1746                                 interpret_stat_error(fbuf, True);
1747                         return;
1748                 }
1749                 if (errno == ENOTDIR && (flags & FLAG_PERHAPS_DIR))
1750                         return;
1751                 io_error |= IOERR_GENERAL;
1752                 rsyserr(FERROR_XFER, errno, "opendir %s failed", full_fname(fbuf));
1753                 return;
1754         }
1755
1756         p = fbuf + len;
1757         if (len == 1 && *fbuf == '/')
1758                 remainder = MAXPATHLEN - 1;
1759         else if (len < MAXPATHLEN-1) {
1760                 *p++ = '/';
1761                 *p = '\0';
1762                 remainder = MAXPATHLEN - (len + 1);
1763         } else
1764                 remainder = 0;
1765
1766         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1767                 unsigned name_len;
1768                 char *dname = d_name(di);
1769                 if (dname[0] == '.' && (dname[1] == '\0'
1770                     || (dname[1] == '.' && dname[2] == '\0')))
1771                         continue;
1772                 name_len = strlcpy(p, dname, remainder);
1773                 if (name_len >= remainder) {
1774                         char save = fbuf[len];
1775                         fbuf[len] = '\0';
1776                         io_error |= IOERR_GENERAL;
1777                         rprintf(FERROR_XFER,
1778                                 "filename overflows max-path len by %u: %s/%s\n",
1779                                 name_len - remainder + 1, fbuf, dname);
1780                         fbuf[len] = save;
1781                         continue;
1782                 }
1783                 if (dname[0] == '\0') {
1784                         io_error |= IOERR_GENERAL;
1785                         rprintf(FERROR_XFER,
1786                                 "cannot send file with empty name in %s\n",
1787                                 full_fname(fbuf));
1788                         continue;
1789                 }
1790
1791                 send_file_name(f, flist, fbuf, NULL, flags, filter_level);
1792         }
1793
1794         fbuf[len] = '\0';
1795
1796         if (errno) {
1797                 io_error |= IOERR_GENERAL;
1798                 rsyserr(FERROR_XFER, errno, "readdir(%s)", full_fname(fbuf));
1799         }
1800
1801         closedir(d);
1802
1803         if (f >= 0 && recurse && !divert_dirs) {
1804                 int i, end = flist->used - 1;
1805                 /* send_if_directory() bumps flist->used, so use "end". */
1806                 for (i = start; i <= end; i++)
1807                         send_if_directory(f, flist, flist->files[i], fbuf, len, flags);
1808         }
1809 }
1810
1811 static void send_implied_dirs(int f, struct file_list *flist, char *fname,
1812                               char *start, char *limit, int flags, char name_type)
1813 {
1814         static char lastpath[MAXPATHLEN] = "";
1815         static int lastpath_len = 0;
1816         static struct file_struct *lastpath_struct = NULL;
1817         struct file_struct *file;
1818         item_list *relname_list;
1819         relnamecache **rnpp;
1820         int len, need_new_dir, depth = 0;
1821         filter_rule_list save_filter_list = filter_list;
1822
1823         flags = (flags | FLAG_IMPLIED_DIR) & ~(FLAG_TOP_DIR | FLAG_CONTENT_DIR);
1824         filter_list.head = filter_list.tail = NULL; /* Don't filter implied dirs. */
1825
1826         if (inc_recurse) {
1827                 if (lastpath_struct && F_PATHNAME(lastpath_struct) == pathname
1828                  && lastpath_len == limit - fname
1829                  && strncmp(lastpath, fname, lastpath_len) == 0)
1830                         need_new_dir = 0;
1831                 else
1832                         need_new_dir = 1;
1833         } else {
1834                 char *tp = fname, *lp = lastpath;
1835                 /* Skip any initial directories in our path that we
1836                  * have in common with lastpath. */
1837                 assert(start == fname);
1838                 for ( ; ; tp++, lp++) {
1839                         if (tp == limit) {
1840                                 if (*lp == '/' || *lp == '\0')
1841                                         goto done;
1842                                 break;
1843                         }
1844                         if (*lp != *tp)
1845                                 break;
1846                         if (*tp == '/') {
1847                                 start = tp;
1848                                 depth++;
1849                         }
1850                 }
1851                 need_new_dir = 1;
1852         }
1853
1854         if (need_new_dir) {
1855                 int save_copy_links = copy_links;
1856                 int save_xfer_dirs = xfer_dirs;
1857                 char *slash;
1858
1859                 copy_links = xfer_dirs = 1;
1860
1861                 *limit = '\0';
1862
1863                 for (slash = start; (slash = strchr(slash+1, '/')) != NULL; ) {
1864                         *slash = '\0';
1865                         file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1866                         depth++;
1867                         if (!inc_recurse && file && S_ISDIR(file->mode))
1868                                 change_local_filter_dir(fname, strlen(fname), depth);
1869                         *slash = '/';
1870                 }
1871
1872                 file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1873                 if (inc_recurse) {
1874                         if (file && !S_ISDIR(file->mode))
1875                                 file = NULL;
1876                         lastpath_struct = file;
1877                 } else if (file && S_ISDIR(file->mode))
1878                         change_local_filter_dir(fname, strlen(fname), ++depth);
1879
1880                 strlcpy(lastpath, fname, sizeof lastpath);
1881                 lastpath_len = limit - fname;
1882
1883                 *limit = '/';
1884
1885                 copy_links = save_copy_links;
1886                 xfer_dirs = save_xfer_dirs;
1887
1888                 if (!inc_recurse)
1889                         goto done;
1890         }
1891
1892         if (!lastpath_struct)
1893                 goto done; /* dir must have vanished */
1894
1895         len = strlen(limit+1);
1896         memcpy(&relname_list, F_DIR_RELNAMES_P(lastpath_struct), sizeof relname_list);
1897         if (!relname_list) {
1898                 if (!(relname_list = new0(item_list)))
1899                         out_of_memory("send_implied_dirs");
1900                 memcpy(F_DIR_RELNAMES_P(lastpath_struct), &relname_list, sizeof relname_list);
1901         }
1902         rnpp = EXPAND_ITEM_LIST(relname_list, relnamecache *, 32);
1903         if (!(*rnpp = (relnamecache*)new_array(char, sizeof (relnamecache) + len)))
1904                 out_of_memory("send_implied_dirs");
1905         (*rnpp)->name_type = name_type;
1906         strlcpy((*rnpp)->fname, limit+1, len + 1);
1907
1908 done:
1909         filter_list = save_filter_list;
1910 }
1911
1912 static NORETURN void fatal_unsafe_io_error(void)
1913 {
1914         /* This (sadly) can only happen when pushing data because
1915          * the sender does not know about what kind of delete
1916          * is in effect on the receiving side when pulling. */
1917         rprintf(FERROR_XFER, "FATAL I/O ERROR: dying to avoid a --delete-%s issue with a pre-3.0.7 receiver.\n",
1918                 delete_during == 2 ? "delay" : "during");
1919         exit_cleanup(RERR_UNSUPPORTED);
1920 }
1921
1922 static void send1extra(int f, struct file_struct *file, struct file_list *flist)
1923 {
1924         char fbuf[MAXPATHLEN];
1925         item_list *relname_list;
1926         int len, dlen, flags = FLAG_DIVERT_DIRS | FLAG_CONTENT_DIR;
1927         size_t j;
1928
1929         f_name(file, fbuf);
1930         dlen = strlen(fbuf);
1931
1932         if (!change_pathname(file, NULL, 0))
1933                 exit_cleanup(RERR_FILESELECT);
1934
1935         change_local_filter_dir(fbuf, dlen, send_dir_depth);
1936
1937         if (file->flags & FLAG_CONTENT_DIR) {
1938                 if (one_file_system) {
1939                         STRUCT_STAT st;
1940                         if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1941                                 interpret_stat_error(fbuf, True);
1942                                 return;
1943                         }
1944                         filesystem_dev = st.st_dev;
1945                 }
1946                 send_directory(f, flist, fbuf, dlen, flags);
1947         }
1948
1949         if (!relative_paths)
1950                 return;
1951
1952         memcpy(&relname_list, F_DIR_RELNAMES_P(file), sizeof relname_list);
1953         if (!relname_list)
1954                 return;
1955
1956         for (j = 0; j < relname_list->count; j++) {
1957                 char *slash;
1958                 relnamecache *rnp = ((relnamecache**)relname_list->items)[j];
1959                 char name_type = rnp->name_type;
1960
1961                 fbuf[dlen] = '/';
1962                 len = strlcpy(fbuf + dlen + 1, rnp->fname, sizeof fbuf - dlen - 1);
1963                 free(rnp);
1964                 if (len >= (int)sizeof fbuf)
1965                         continue; /* Impossible... */
1966
1967                 slash = strchr(fbuf+dlen+1, '/');
1968                 if (slash) {
1969                         send_implied_dirs(f, flist, fbuf, fbuf+dlen+1, slash, flags, name_type);
1970                         continue;
1971                 }
1972
1973                 if (name_type != NORMAL_NAME) {
1974                         STRUCT_STAT st;
1975                         if (name_type == MISSING_NAME)
1976                                 memset(&st, 0, sizeof st);
1977                         else if (link_stat(fbuf, &st, 1) != 0) {
1978                                 interpret_stat_error(fbuf, True);
1979                                 continue;
1980                         }
1981                         send_file_name(f, flist, fbuf, &st, FLAG_TOP_DIR | flags, ALL_FILTERS);
1982                 } else
1983                         send_file_name(f, flist, fbuf, NULL, FLAG_TOP_DIR | flags, ALL_FILTERS);
1984         }
1985
1986         free(relname_list);
1987 }
1988
1989 static void write_end_of_flist(int f, int send_io_error)
1990 {
1991         if (xfer_flags_as_varint) {
1992                 write_varint(f, 0);
1993                 write_varint(f, send_io_error ? io_error : 0);
1994         } else if (send_io_error) {
1995                 write_shortint(f, XMIT_EXTENDED_FLAGS|XMIT_IO_ERROR_ENDLIST);
1996                 write_varint(f, io_error);
1997         } else
1998                 write_byte(f, 0);
1999 }
2000
2001 void send_extra_file_list(int f, int at_least)
2002 {
2003         struct file_list *flist;
2004         int64 start_write;
2005         uint16 prev_flags;
2006         int save_io_error = io_error;
2007
2008         if (flist_eof)
2009                 return;
2010
2011         if (at_least < 0)
2012                 at_least = file_total - file_old_total + 1;
2013
2014         /* Keep sending data until we have the requested number of
2015          * files in the upcoming file-lists. */
2016         while (file_total - file_old_total < at_least) {
2017                 struct file_struct *file = dir_flist->sorted[send_dir_ndx];
2018                 int dir_ndx, dstart = stats.num_dirs;
2019                 const char *pathname = F_PATHNAME(file);
2020                 int32 *dp;
2021
2022                 flist = flist_new(0, "send_extra_file_list");
2023                 start_write = stats.total_written;
2024
2025                 if (unsort_ndx)
2026                         dir_ndx = F_NDX(file);
2027                 else
2028                         dir_ndx = send_dir_ndx;
2029                 write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
2030                 flist->parent_ndx = send_dir_ndx; /* the sending side must remember the sorted ndx value */
2031
2032                 send1extra(f, file, flist);
2033                 prev_flags = file->flags;
2034                 dp = F_DIR_NODE_P(file);
2035
2036                 /* If there are any duplicate directory names that follow, we
2037                  * send all the dirs together in one file-list.  The dir_flist
2038                  * tree links all the child subdirs onto the last dup dir. */
2039                 while ((dir_ndx = DIR_NEXT_SIBLING(dp)) >= 0
2040                     && dir_flist->sorted[dir_ndx]->flags & FLAG_DUPLICATE) {
2041                         send_dir_ndx = dir_ndx;
2042                         file = dir_flist->sorted[dir_ndx];
2043                         /* Try to avoid some duplicate scanning of identical dirs. */
2044                         if (F_PATHNAME(file) == pathname && prev_flags & FLAG_CONTENT_DIR)
2045                                 file->flags &= ~FLAG_CONTENT_DIR;
2046                         send1extra(f, file, flist);
2047                         prev_flags = file->flags;
2048                         dp = F_DIR_NODE_P(file);
2049                 }
2050
2051                 if (io_error == save_io_error || ignore_errors)
2052                         write_end_of_flist(f, 0);
2053                 else if (use_safe_inc_flist)
2054                         write_end_of_flist(f, 1);
2055                 else {
2056                         if (delete_during)
2057                                 fatal_unsafe_io_error();
2058                         write_end_of_flist(f, 0);
2059                 }
2060
2061                 if (need_unsorted_flist) {
2062                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2063                                 out_of_memory("send_extra_file_list");
2064                         memcpy(flist->sorted, flist->files,
2065                                flist->used * sizeof (struct file_struct*));
2066                 } else
2067                         flist->sorted = flist->files;
2068
2069                 flist_sort_and_clean(flist, 0);
2070
2071                 add_dirs_to_tree(send_dir_ndx, flist, stats.num_dirs - dstart);
2072                 flist_done_allocating(flist);
2073
2074                 file_total += flist->used;
2075                 stats.flist_size += stats.total_written - start_write;
2076                 stats.num_files += flist->used;
2077                 if (DEBUG_GTE(FLIST, 3))
2078                         output_flist(flist);
2079
2080                 if (DIR_FIRST_CHILD(dp) >= 0) {
2081                         send_dir_ndx = DIR_FIRST_CHILD(dp);
2082                         send_dir_depth++;
2083                 } else {
2084                         while (DIR_NEXT_SIBLING(dp) < 0) {
2085                                 if ((send_dir_ndx = DIR_PARENT(dp)) < 0) {
2086                                         write_ndx(f, NDX_FLIST_EOF);
2087                                         flist_eof = 1;
2088                                         if (DEBUG_GTE(FLIST, 3))
2089                                                 rprintf(FINFO, "[%s] flist_eof=1\n", who_am_i());
2090                                         change_local_filter_dir(NULL, 0, 0);
2091                                         goto finish;
2092                                 }
2093                                 send_dir_depth--;
2094                                 file = dir_flist->sorted[send_dir_ndx];
2095                                 dp = F_DIR_NODE_P(file);
2096                         }
2097                         send_dir_ndx = DIR_NEXT_SIBLING(dp);
2098                 }
2099         }
2100
2101   finish:
2102         if (io_error != save_io_error && protocol_version == 30 && !ignore_errors)
2103                 send_msg_int(MSG_IO_ERROR, io_error);
2104 }
2105
2106 struct file_list *send_file_list(int f, int argc, char *argv[])
2107 {
2108         static const char *lastdir;
2109         static int lastdir_len = -1;
2110         int len, dirlen;
2111         STRUCT_STAT st;
2112         char *p, *dir;
2113         struct file_list *flist;
2114         struct timeval start_tv, end_tv;
2115         int64 start_write;
2116         int use_ff_fd = 0;
2117         int disable_buffering, reenable_multiplex = -1;
2118         int flags = recurse ? FLAG_CONTENT_DIR : 0;
2119         int reading_remotely = filesfrom_host != NULL;
2120         int rl_flags = (reading_remotely ? 0 : RL_DUMP_COMMENTS)
2121 #ifdef ICONV_OPTION
2122                      | (filesfrom_convert ? RL_CONVERT : 0)
2123 #endif
2124                      | (eol_nulls || reading_remotely ? RL_EOL_NULLS : 0);
2125         int implied_dot_dir = 0;
2126
2127         rprintf(FLOG, "building file list\n");
2128         if (show_filelist_progress)
2129                 start_filelist_progress("building file list");
2130         else if (inc_recurse && INFO_GTE(FLIST, 1) && !am_server)
2131                 rprintf(FCLIENT, "sending incremental file list\n");
2132
2133         start_write = stats.total_written;
2134         gettimeofday(&start_tv, NULL);
2135
2136         if (relative_paths && protocol_version >= 30)
2137                 implied_dirs = 1; /* We send flagged implied dirs */
2138
2139 #ifdef SUPPORT_HARD_LINKS
2140         if (preserve_hard_links && protocol_version >= 30 && !cur_flist)
2141                 init_hard_links();
2142 #endif
2143
2144         flist = cur_flist = flist_new(0, "send_file_list");
2145         if (inc_recurse) {
2146                 dir_flist = flist_new(FLIST_TEMP, "send_file_list");
2147                 flags |= FLAG_DIVERT_DIRS;
2148         } else
2149                 dir_flist = cur_flist;
2150
2151         disable_buffering = io_start_buffering_out(f);
2152         if (filesfrom_fd >= 0) {
2153                 if (argv[0] && !change_dir(argv[0], CD_NORMAL)) {
2154                         rsyserr(FERROR_XFER, errno, "change_dir %s failed",
2155                                 full_fname(argv[0]));
2156                         exit_cleanup(RERR_FILESELECT);
2157                 }
2158                 if (protocol_version < 31) {
2159                         /* Older protocols send the files-from data w/o packaging
2160                          * it in multiplexed I/O packets, so temporarily switch
2161                          * to buffered I/O to match this behavior. */
2162                         reenable_multiplex = io_end_multiplex_in(MPLX_TO_BUFFERED);
2163                 }
2164                 use_ff_fd = 1;
2165         }
2166
2167         if (!orig_dir)
2168                 orig_dir = strdup(curr_dir);
2169
2170         while (1) {
2171                 char fbuf[MAXPATHLEN], *fn, name_type;
2172
2173                 if (use_ff_fd) {
2174                         if (read_line(filesfrom_fd, fbuf, sizeof fbuf, rl_flags) == 0)
2175                                 break;
2176                         sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
2177                 } else {
2178                         if (argc-- == 0)
2179                                 break;
2180                         strlcpy(fbuf, *argv++, MAXPATHLEN);
2181                         if (sanitize_paths)
2182                                 sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
2183                 }
2184
2185                 len = strlen(fbuf);
2186                 if (relative_paths) {
2187                         /* We clean up fbuf below. */
2188                         name_type = NORMAL_NAME;
2189                 } else if (!len || fbuf[len - 1] == '/') {
2190                         if (len == 2 && fbuf[0] == '.') {
2191                                 /* Turn "./" into just "." rather than "./." */
2192                                 fbuf[--len] = '\0';
2193                         } else {
2194                                 if (len + 1 >= MAXPATHLEN)
2195                                         overflow_exit("send_file_list");
2196                                 fbuf[len++] = '.';
2197                                 fbuf[len] = '\0';
2198                         }
2199                         name_type = DOTDIR_NAME;
2200                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
2201                     && (len == 2 || fbuf[len-3] == '/')) {
2202                         if (len + 2 >= MAXPATHLEN)
2203                                 overflow_exit("send_file_list");
2204                         fbuf[len++] = '/';
2205                         fbuf[len++] = '.';
2206                         fbuf[len] = '\0';
2207                         name_type = DOTDIR_NAME;
2208                 } else if (fbuf[len-1] == '.' && (len == 1 || fbuf[len-2] == '/'))
2209                         name_type = DOTDIR_NAME;
2210                 else
2211                         name_type = NORMAL_NAME;
2212
2213                 dir = NULL;
2214
2215                 if (!relative_paths) {
2216                         p = strrchr(fbuf, '/');
2217                         if (p) {
2218                                 *p = '\0';
2219                                 if (p == fbuf)
2220                                         dir = "/";
2221                                 else
2222                                         dir = fbuf;
2223                                 len -= p - fbuf + 1;
2224                                 fn = p + 1;
2225                         } else
2226                                 fn = fbuf;
2227                 } else {
2228                         if ((p = strstr(fbuf, "/./")) != NULL) {
2229                                 *p = '\0';
2230                                 if (p == fbuf)
2231                                         dir = "/";
2232                                 else {
2233                                         dir = fbuf;
2234                                         clean_fname(dir, 0);
2235                                 }
2236                                 fn = p + 3;
2237                                 while (*fn == '/')
2238                                         fn++;
2239                                 if (!*fn)
2240                                         *--fn = '\0'; /* ensure room for '.' */
2241                         } else
2242                                 fn = fbuf;
2243                         /* A leading ./ can be used in relative mode to affect
2244                          * the dest dir without its name being in the path. */
2245                         if (*fn == '.' && fn[1] == '/' && fn[2] && !implied_dot_dir)
2246                                 implied_dot_dir = -1;
2247                         len = clean_fname(fn, CFN_KEEP_TRAILING_SLASH
2248                                             | CFN_DROP_TRAILING_DOT_DIR);
2249                         if (len == 1) {
2250                                 if (fn[0] == '/') {
2251                                         fn = "/.";
2252                                         len = 2;
2253                                         name_type = DOTDIR_NAME;
2254                                 } else if (fn[0] == '.')
2255                                         name_type = DOTDIR_NAME;
2256                         } else if (fn[len-1] == '/') {
2257                                 fn[--len] = '\0';
2258                                 if (len == 1 && *fn == '.')
2259                                         name_type = DOTDIR_NAME;
2260                                 else
2261                                         name_type = SLASH_ENDING_NAME;
2262                         }
2263                         /* Reject a ".." dir in the active part of the path. */
2264                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
2265                                 if ((p[2] == '/' || p[2] == '\0')
2266                                  && (p == fn || p[-1] == '/')) {
2267                                         rprintf(FERROR,
2268                                             "found \"..\" dir in relative path: %s\n",
2269                                             fn);
2270                                         exit_cleanup(RERR_SYNTAX);
2271                                 }
2272                         }
2273                 }
2274
2275                 if (!*fn) {
2276                         len = 1;
2277                         fn = ".";
2278                         name_type = DOTDIR_NAME;
2279                 }
2280
2281                 dirlen = dir ? strlen(dir) : 0;
2282                 if (dirlen != lastdir_len || memcmp(lastdir, dir, dirlen) != 0) {
2283                         if (!change_pathname(NULL, dir, -dirlen))
2284                                 goto bad_path;
2285                         lastdir = pathname;
2286                         lastdir_len = pathname_len;
2287                 } else if (!change_pathname(NULL, lastdir, lastdir_len)) {
2288                     bad_path:
2289                         if (implied_dot_dir < 0)
2290                                 implied_dot_dir = 0;
2291                         continue;
2292                 }
2293
2294                 if (implied_dot_dir < 0) {
2295                         implied_dot_dir = 1;
2296                         send_file_name(f, flist, ".", NULL, (flags | FLAG_IMPLIED_DIR) & ~FLAG_CONTENT_DIR, ALL_FILTERS);
2297                 }
2298
2299                 if (fn != fbuf)
2300                         memmove(fbuf, fn, len + 1);
2301
2302                 if (link_stat(fbuf, &st, copy_dirlinks || name_type != NORMAL_NAME) != 0
2303                  || (name_type != DOTDIR_NAME && is_excluded(fbuf, S_ISDIR(st.st_mode) != 0, SERVER_FILTERS))
2304                  || (relative_paths && path_is_daemon_excluded(fbuf, 1))) {
2305                         if (errno != ENOENT || missing_args == 0) {
2306                                 /* This is a transfer error, but inhibit deletion
2307                                  * only if we might be omitting an existing file. */
2308                                 if (errno != ENOENT)
2309                                         io_error |= IOERR_GENERAL;
2310                                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
2311                                         full_fname(fbuf));
2312                                 continue;
2313                         } else if (missing_args == 1) {
2314                                 /* Just ignore the arg. */
2315                                 continue;
2316                         } else /* (missing_args == 2) */ {
2317                                 /* Send the arg as a "missing" entry with
2318                                  * mode 0, which tells the generator to delete it. */
2319                                 memset(&st, 0, sizeof st);
2320                         }
2321                 }
2322
2323                 /* A dot-dir should not be excluded! */
2324                 if (name_type != DOTDIR_NAME && st.st_mode != 0
2325                  && is_excluded(fbuf, S_ISDIR(st.st_mode) != 0, ALL_FILTERS))
2326                         continue;
2327
2328                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
2329                         rprintf(FINFO, "skipping directory %s\n", fbuf);
2330                         continue;
2331                 }
2332
2333                 if (inc_recurse && relative_paths && *fbuf) {
2334                         if ((p = strchr(fbuf+1, '/')) != NULL) {
2335                                 if (p - fbuf == 1 && *fbuf == '.') {
2336                                         if ((fn = strchr(p+1, '/')) != NULL)
2337                                                 p = fn;
2338                                 } else
2339                                         fn = p;
2340                                 send_implied_dirs(f, flist, fbuf, fbuf, p, flags,
2341                                                   IS_MISSING_FILE(st) ? MISSING_NAME : name_type);
2342                                 if (fn == p)
2343                                         continue;
2344                         }
2345                 } else if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
2346                         /* Send the implied directories at the start of the
2347                          * source spec, so we get their permissions right. */
2348                         send_implied_dirs(f, flist, fbuf, fbuf, p, flags, 0);
2349                 }
2350
2351                 if (one_file_system)
2352                         filesystem_dev = st.st_dev;
2353
2354                 if (recurse || (xfer_dirs && name_type != NORMAL_NAME)) {
2355                         struct file_struct *file;
2356                         file = send_file_name(f, flist, fbuf, &st,
2357                                               FLAG_TOP_DIR | FLAG_CONTENT_DIR | flags,
2358                                               NO_FILTERS);
2359                         if (!file)
2360                                 continue;
2361                         if (inc_recurse) {
2362                                 if (name_type == DOTDIR_NAME) {
2363                                         if (send_dir_depth < 0) {
2364                                                 send_dir_depth = 0;
2365                                                 change_local_filter_dir(fbuf, len, send_dir_depth);
2366                                         }
2367                                         send_directory(f, flist, fbuf, len, flags);
2368                                 }
2369                         } else
2370                                 send_if_directory(f, flist, file, fbuf, len, flags);
2371                 } else
2372                         send_file_name(f, flist, fbuf, &st, flags, NO_FILTERS);
2373         }
2374
2375         if (reenable_multiplex >= 0)
2376                 io_start_multiplex_in(reenable_multiplex);
2377
2378         gettimeofday(&end_tv, NULL);
2379         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2380                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2381         if (stats.flist_buildtime == 0)
2382                 stats.flist_buildtime = 1;
2383         start_tv = end_tv;
2384
2385         /* Indicate end of file list */
2386         if (io_error == 0 || ignore_errors)
2387                 write_end_of_flist(f, 0);
2388         else if (use_safe_inc_flist)
2389                 write_end_of_flist(f, 1);
2390         else {
2391                 if (delete_during && inc_recurse)
2392                         fatal_unsafe_io_error();
2393                 write_end_of_flist(f, 0);
2394         }
2395
2396 #ifdef SUPPORT_HARD_LINKS
2397         if (preserve_hard_links && protocol_version >= 30 && !inc_recurse)
2398                 idev_destroy();
2399 #endif
2400
2401         if (show_filelist_progress)
2402                 finish_filelist_progress(flist);
2403
2404         gettimeofday(&end_tv, NULL);
2405         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2406                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2407
2408         /* When converting names, both sides keep an unsorted file-list array
2409          * because the names will differ on the sending and receiving sides
2410          * (both sides will use the unsorted index number for each item). */
2411
2412         /* Sort the list without removing any duplicates.  This allows the
2413          * receiving side to ask for whatever name it kept.  For incremental
2414          * recursion mode, the sender marks duplicate dirs so that it can
2415          * send them together in a single file-list. */
2416         if (need_unsorted_flist) {
2417                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2418                         out_of_memory("send_file_list");
2419                 memcpy(flist->sorted, flist->files,
2420                        flist->used * sizeof (struct file_struct*));
2421         } else
2422                 flist->sorted = flist->files;
2423         flist_sort_and_clean(flist, 0);
2424         file_total += flist->used;
2425         file_old_total += flist->used;
2426
2427         if (numeric_ids <= 0 && !inc_recurse)
2428                 send_id_list(f);
2429
2430         /* send the io_error flag */
2431         if (protocol_version < 30)
2432                 write_int(f, ignore_errors ? 0 : io_error);
2433         else if (!use_safe_inc_flist && io_error && !ignore_errors)
2434                 send_msg_int(MSG_IO_ERROR, io_error);
2435
2436         if (disable_buffering)
2437                 io_end_buffering_out(IOBUF_FREE_BUFS);
2438
2439         stats.flist_size = stats.total_written - start_write;
2440         stats.num_files = flist->used;
2441
2442         if (DEBUG_GTE(FLIST, 3))
2443                 output_flist(flist);
2444
2445         if (DEBUG_GTE(FLIST, 2))
2446                 rprintf(FINFO, "send_file_list done\n");
2447
2448         if (inc_recurse) {
2449                 send_dir_depth = 1;
2450                 add_dirs_to_tree(-1, flist, stats.num_dirs);
2451                 if (!file_total || strcmp(flist->sorted[flist->low]->basename, ".") != 0)
2452                         flist->parent_ndx = -1;
2453                 flist_done_allocating(flist);
2454                 if (send_dir_ndx < 0) {
2455                         write_ndx(f, NDX_FLIST_EOF);
2456                         flist_eof = 1;
2457                         if (DEBUG_GTE(FLIST, 3))
2458                                 rprintf(FINFO, "[%s] flist_eof=1\n", who_am_i());
2459                 }
2460                 else if (file_total == 1) {
2461                         /* If we're creating incremental file-lists and there
2462                          * was just 1 item in the first file-list, send 1 more
2463                          * file-list to check if this is a 1-file xfer. */
2464                         send_extra_file_list(f, 1);
2465                 }
2466         } else {
2467                 flist_eof = 1;
2468                 if (DEBUG_GTE(FLIST, 3))
2469                         rprintf(FINFO, "[%s] flist_eof=1\n", who_am_i());
2470         }
2471
2472         return flist;
2473 }
2474
2475 struct file_list *recv_file_list(int f, int dir_ndx)
2476 {
2477         const char *good_dirname = NULL;
2478         struct file_list *flist;
2479         int dstart, flags;
2480         int64 start_read;
2481
2482         if (!first_flist) {
2483                 if (show_filelist_progress)
2484                         start_filelist_progress("receiving file list");
2485                 else if (inc_recurse && INFO_GTE(FLIST, 1) && !am_server)
2486                         rprintf(FCLIENT, "receiving incremental file list\n");
2487                 rprintf(FLOG, "receiving file list\n");
2488                 if (usermap)
2489                         parse_name_map(usermap, True);
2490                 if (groupmap)
2491                         parse_name_map(groupmap, False);
2492         }
2493
2494         start_read = stats.total_read;
2495
2496 #ifdef SUPPORT_HARD_LINKS
2497         if (preserve_hard_links && !first_flist)
2498                 init_hard_links();
2499 #endif
2500
2501         flist = flist_new(0, "recv_file_list");
2502
2503         if (inc_recurse) {
2504                 if (flist->ndx_start == 1)
2505                         dir_flist = flist_new(FLIST_TEMP, "recv_file_list");
2506                 dstart = dir_flist->used;
2507         } else {
2508                 dir_flist = flist;
2509                 dstart = 0;
2510         }
2511
2512         while (1) {
2513                 struct file_struct *file;
2514
2515                 if (xfer_flags_as_varint) {
2516                         if ((flags = read_varint(f)) == 0) {
2517                                 int err = read_varint(f);
2518                                 if (!ignore_errors)
2519                                         io_error |= err;
2520                                 break;
2521                         }
2522                 } else {
2523                         if ((flags = read_byte(f)) == 0)
2524                                 break;
2525
2526                         if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
2527                                 flags |= read_byte(f) << 8;
2528
2529                         if (flags == (XMIT_EXTENDED_FLAGS|XMIT_IO_ERROR_ENDLIST)) {
2530                                 int err;
2531                                 if (!use_safe_inc_flist) {
2532                                         rprintf(FERROR, "Invalid flist flag: %x\n", flags);
2533                                         exit_cleanup(RERR_PROTOCOL);
2534                                 }
2535                                 err = read_varint(f);
2536                                 if (!ignore_errors)
2537                                         io_error |= err;
2538                                 break;
2539                         }
2540                 }
2541
2542                 flist_expand(flist, 1);
2543                 file = recv_file_entry(f, flist, flags);
2544
2545                 if (inc_recurse) {
2546                         static const char empty_dir[] = "\0";
2547                         const char *cur_dir = file->dirname ? file->dirname : empty_dir;
2548                         if (relative_paths && *cur_dir == '/')
2549                                 cur_dir++;
2550                         if (cur_dir != good_dirname) {
2551                                 const char *d = dir_ndx >= 0 ? f_name(dir_flist->files[dir_ndx], NULL) : empty_dir;
2552                                 if (strcmp(cur_dir, d) != 0) {
2553                                         rprintf(FERROR,
2554                                                 "ABORTING due to invalid path from sender: %s/%s\n",
2555                                                 cur_dir, file->basename);
2556                                         exit_cleanup(RERR_PROTOCOL);
2557                                 }
2558                                 good_dirname = cur_dir;
2559                         }
2560                 }
2561
2562                 if (S_ISREG(file->mode)) {
2563                         /* Already counted */
2564                 } else if (S_ISDIR(file->mode)) {
2565                         if (inc_recurse) {
2566                                 flist_expand(dir_flist, 1);
2567                                 dir_flist->files[dir_flist->used++] = file;
2568                         }
2569                         stats.num_dirs++;
2570                 } else if (S_ISLNK(file->mode))
2571                         stats.num_symlinks++;
2572                 else if (IS_DEVICE(file->mode))
2573                         stats.num_symlinks++;
2574                 else
2575                         stats.num_specials++;
2576
2577                 flist->files[flist->used++] = file;
2578
2579                 maybe_emit_filelist_progress(flist->used);
2580
2581                 if (DEBUG_GTE(FLIST, 2)) {
2582                         char *name = f_name(file, NULL);
2583                         rprintf(FINFO, "recv_file_name(%s)\n", NS(name));
2584                 }
2585         }
2586         file_total += flist->used;
2587
2588         if (DEBUG_GTE(FLIST, 2))
2589                 rprintf(FINFO, "received %d names\n", flist->used);
2590
2591         if (show_filelist_progress)
2592                 finish_filelist_progress(flist);
2593
2594         if (need_unsorted_flist) {
2595                 /* Create an extra array of index pointers that we can sort for
2596                  * the generator's use (for wading through the files in sorted
2597                  * order and for calling flist_find()).  We keep the "files"
2598                  * list unsorted for our exchange of index numbers with the
2599                  * other side (since their names may not sort the same). */
2600                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2601                         out_of_memory("recv_file_list");
2602                 memcpy(flist->sorted, flist->files,
2603                        flist->used * sizeof (struct file_struct*));
2604                 if (inc_recurse && dir_flist->used > dstart) {
2605                         static int dir_flist_malloced = 0;
2606                         if (dir_flist_malloced < dir_flist->malloced) {
2607                                 dir_flist->sorted = realloc_array(dir_flist->sorted,
2608                                                         struct file_struct *,
2609                                                         dir_flist->malloced);
2610                                 dir_flist_malloced = dir_flist->malloced;
2611                         }
2612                         memcpy(dir_flist->sorted + dstart, dir_flist->files + dstart,
2613                                (dir_flist->used - dstart) * sizeof (struct file_struct*));
2614                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2615                 }
2616         } else {
2617                 flist->sorted = flist->files;
2618                 if (inc_recurse && dir_flist->used > dstart) {
2619                         dir_flist->sorted = dir_flist->files;
2620                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2621                 }
2622         }
2623
2624         if (inc_recurse)
2625                 flist_done_allocating(flist);
2626         else if (f >= 0) {
2627                 recv_id_list(f, flist);
2628                 flist_eof = 1;
2629                 if (DEBUG_GTE(FLIST, 3))
2630                         rprintf(FINFO, "[%s] flist_eof=1\n", who_am_i());
2631         }
2632
2633         /* The --relative option sends paths with a leading slash, so we need
2634          * to specify the strip_root option here.  We rejected leading slashes
2635          * for a non-relative transfer in recv_file_entry(). */
2636         flist_sort_and_clean(flist, relative_paths);
2637
2638         if (protocol_version < 30) {
2639                 /* Recv the io_error flag */
2640                 int err = read_int(f);
2641                 if (!ignore_errors)
2642                         io_error |= err;
2643         } else if (inc_recurse && flist->ndx_start == 1) {
2644                 if (!file_total || strcmp(flist->sorted[flist->low]->basename, ".") != 0)
2645                         flist->parent_ndx = -1;
2646         }
2647
2648         if (DEBUG_GTE(FLIST, 3))
2649                 output_flist(flist);
2650
2651         if (DEBUG_GTE(FLIST, 2))
2652                 rprintf(FINFO, "recv_file_list done\n");
2653
2654         stats.flist_size += stats.total_read - start_read;
2655         stats.num_files += flist->used;
2656
2657         return flist;
2658 }
2659
2660 /* This is only used once by the receiver if the very first file-list
2661  * has exactly one item in it. */
2662 void recv_additional_file_list(int f)
2663 {
2664         struct file_list *flist;
2665         int ndx = read_ndx(f);
2666         if (ndx == NDX_FLIST_EOF) {
2667                 flist_eof = 1;
2668                 if (DEBUG_GTE(FLIST, 3))
2669                         rprintf(FINFO, "[%s] flist_eof=1\n", who_am_i());
2670                 change_local_filter_dir(NULL, 0, 0);
2671         } else {
2672                 ndx = NDX_FLIST_OFFSET - ndx;
2673                 if (ndx < 0 || ndx >= dir_flist->used) {
2674                         ndx = NDX_FLIST_OFFSET - ndx;
2675                         rprintf(FERROR,
2676                                 "[%s] Invalid dir index: %d (%d - %d)\n",
2677                                 who_am_i(), ndx, NDX_FLIST_OFFSET,
2678                                 NDX_FLIST_OFFSET - dir_flist->used + 1);
2679                         exit_cleanup(RERR_PROTOCOL);
2680                 }
2681                 if (DEBUG_GTE(FLIST, 3)) {
2682                         rprintf(FINFO, "[%s] receiving flist for dir %d\n",
2683                                 who_am_i(), ndx);
2684                 }
2685                 flist = recv_file_list(f, ndx);
2686                 flist->parent_ndx = ndx;
2687         }
2688 }
2689
2690 /* Search for an identically-named item in the file list.  Note that the
2691  * items must agree in their directory-ness, or no match is returned. */
2692 int flist_find(struct file_list *flist, struct file_struct *f)
2693 {
2694         int low = flist->low, high = flist->high;
2695         int diff, mid, mid_up;
2696
2697         while (low <= high) {
2698                 mid = (low + high) / 2;
2699                 if (F_IS_ACTIVE(flist->sorted[mid]))
2700                         mid_up = mid;
2701                 else {
2702                         /* Scan for the next non-empty entry using the cached
2703                          * distance values.  If the value isn't fully up-to-
2704                          * date, update it. */
2705                         mid_up = mid + F_DEPTH(flist->sorted[mid]);
2706                         if (!F_IS_ACTIVE(flist->sorted[mid_up])) {
2707                                 do {
2708                                     mid_up += F_DEPTH(flist->sorted[mid_up]);
2709                                 } while (!F_IS_ACTIVE(flist->sorted[mid_up]));
2710                                 F_DEPTH(flist->sorted[mid]) = mid_up - mid;
2711                         }
2712                         if (mid_up > high) {
2713                                 /* If there's nothing left above us, set high to
2714                                  * a non-empty entry below us and continue. */
2715                                 high = mid - (int)flist->sorted[mid]->len32;
2716                                 if (!F_IS_ACTIVE(flist->sorted[high])) {
2717                                         do {
2718                                             high -= (int)flist->sorted[high]->len32;
2719                                         } while (!F_IS_ACTIVE(flist->sorted[high]));
2720                                         flist->sorted[mid]->len32 = mid - high;
2721                                 }
2722                                 continue;
2723                         }
2724                 }
2725                 diff = f_name_cmp(flist->sorted[mid_up], f);
2726                 if (diff == 0) {
2727                         if (protocol_version < 29
2728                             && S_ISDIR(flist->sorted[mid_up]->mode)
2729                             != S_ISDIR(f->mode))
2730                                 return -1;
2731                         return mid_up;
2732                 }
2733                 if (diff < 0)
2734                         low = mid_up + 1;
2735                 else
2736                         high = mid - 1;
2737         }
2738         return -1;
2739 }
2740
2741 /* Search for a name in the file list.  You must specify want_dir_match as:
2742  * 1=match directories, 0=match non-directories, or -1=match either. */
2743 int flist_find_name(struct file_list *flist, const char *fname, int want_dir_match)
2744 {
2745         struct { /* We have to create a temporary file_struct for the search. */
2746                 struct file_struct f;
2747                 char name_space[MAXPATHLEN];
2748         } t;
2749         char fbuf[MAXPATHLEN];
2750         const char *slash = strrchr(fname, '/');
2751         const char *basename = slash ? slash+1 : fname;
2752
2753         memset(&t.f, 0, FILE_STRUCT_LEN);
2754         memcpy((void *)t.f.basename, basename, strlen(basename)+1);
2755
2756         if (slash) {
2757                 strlcpy(fbuf, fname, slash - fname + 1);
2758                 t.f.dirname = fbuf;
2759         } else
2760                 t.f.dirname = NULL;
2761
2762         t.f.mode = want_dir_match > 0 ? S_IFDIR : S_IFREG;
2763
2764         if (want_dir_match < 0)
2765                 return flist_find_ignore_dirness(flist, &t.f);
2766         return flist_find(flist, &t.f);
2767 }
2768
2769 /* Search for an identically-named item in the file list.  Differs from
2770  * flist_find in that an item that agrees with "f" in directory-ness is
2771  * preferred but one that does not is still found. */
2772 int flist_find_ignore_dirness(struct file_list *flist, struct file_struct *f)
2773 {
2774         mode_t save_mode;
2775         int ndx;
2776
2777         /* First look for an item that agrees in directory-ness. */
2778         ndx = flist_find(flist, f);
2779         if (ndx >= 0)
2780                 return ndx;
2781
2782         /* Temporarily flip f->mode to look for an item of opposite
2783          * directory-ness. */
2784         save_mode = f->mode;
2785         f->mode = S_ISDIR(f->mode) ? S_IFREG : S_IFDIR;
2786         ndx = flist_find(flist, f);
2787         f->mode = save_mode;
2788         return ndx;
2789 }
2790
2791 /*
2792  * Free up any resources a file_struct has allocated
2793  * and clear the file.
2794  */
2795 void clear_file(struct file_struct *file)
2796 {
2797         /* The +1 zeros out the first char of the basename. */
2798         memset(file, 0, FILE_STRUCT_LEN + 1);
2799         /* In an empty entry, F_DEPTH() is an offset to the next non-empty
2800          * entry.  Likewise for len32 in the opposite direction.  We assume
2801          * that we're alone for now since flist_find() will adjust the counts
2802          * it runs into that aren't up-to-date. */
2803         file->len32 = F_DEPTH(file) = 1;
2804 }
2805
2806 /* Allocate a new file list. */
2807 struct file_list *flist_new(int flags, char *msg)
2808 {
2809         struct file_list *flist;
2810
2811         if (!(flist = new0(struct file_list)))
2812                 out_of_memory(msg);
2813
2814         if (flags & FLIST_TEMP) {
2815                 if (!(flist->file_pool = pool_create(SMALL_EXTENT, 0,
2816                                                      out_of_memory,
2817                                                      POOL_INTERN)))
2818                         out_of_memory(msg);
2819         } else {
2820                 /* This is a doubly linked list with prev looping back to
2821                  * the end of the list, but the last next pointer is NULL. */
2822                 if (!first_flist) {
2823                         flist->file_pool = pool_create(NORMAL_EXTENT, 0,
2824                                                        out_of_memory,
2825                                                        POOL_INTERN);
2826                         if (!flist->file_pool)
2827                                 out_of_memory(msg);
2828
2829                         flist->ndx_start = flist->flist_num = inc_recurse ? 1 : 0;
2830
2831                         first_flist = cur_flist = flist->prev = flist;
2832                 } else {
2833                         struct file_list *prev = first_flist->prev;
2834
2835                         flist->file_pool = first_flist->file_pool;
2836
2837                         flist->ndx_start = prev->ndx_start + prev->used + 1;
2838                         flist->flist_num = prev->flist_num + 1;
2839
2840                         flist->prev = prev;
2841                         prev->next = first_flist->prev = flist;
2842                 }
2843                 flist->pool_boundary = pool_boundary(flist->file_pool, 0);
2844                 flist_cnt++;
2845         }
2846
2847         return flist;
2848 }
2849
2850 /* Free up all elements in a flist. */
2851 void flist_free(struct file_list *flist)
2852 {
2853         if (!flist->prev) {
2854                 /* Was FLIST_TEMP dir-list. */
2855         } else if (flist == flist->prev) {
2856                 first_flist = cur_flist = NULL;
2857                 file_total = 0;
2858                 flist_cnt = 0;
2859         } else {
2860                 if (flist == cur_flist)
2861                         cur_flist = flist->next;
2862                 if (flist == first_flist)
2863                         first_flist = first_flist->next;
2864                 else {
2865                         flist->prev->next = flist->next;
2866                         if (!flist->next)
2867                                 flist->next = first_flist;
2868                 }
2869                 flist->next->prev = flist->prev;
2870                 file_total -= flist->used;
2871                 flist_cnt--;
2872         }
2873
2874         if (!flist->prev || !flist_cnt)
2875                 pool_destroy(flist->file_pool);
2876         else
2877                 pool_free_old(flist->file_pool, flist->pool_boundary);
2878
2879         if (flist->sorted && flist->sorted != flist->files)
2880                 free(flist->sorted);
2881         free(flist->files);
2882         free(flist);
2883 }
2884
2885 /* This routine ensures we don't have any duplicate names in our file list.
2886  * duplicate names can cause corruption because of the pipelining. */
2887 static void flist_sort_and_clean(struct file_list *flist, int strip_root)
2888 {
2889         char fbuf[MAXPATHLEN];
2890         int i, prev_i;
2891
2892         if (!flist)
2893                 return;
2894         if (flist->used == 0) {
2895                 flist->high = -1;
2896                 flist->low = 0;
2897                 return;
2898         }
2899
2900         fsort(flist->sorted, flist->used);
2901
2902         if (!am_sender || inc_recurse) {
2903                 for (i = prev_i = 0; i < flist->used; i++) {
2904                         if (F_IS_ACTIVE(flist->sorted[i])) {
2905                                 prev_i = i;
2906                                 break;
2907                         }
2908                 }
2909                 flist->low = prev_i;
2910         } else {
2911                 i = prev_i = flist->used - 1;
2912                 flist->low = 0;
2913         }
2914
2915         while (++i < flist->used) {
2916                 int j;
2917                 struct file_struct *file = flist->sorted[i];
2918
2919                 if (!F_IS_ACTIVE(file))
2920                         continue;
2921                 if (f_name_cmp(file, flist->sorted[prev_i]) == 0)
2922                         j = prev_i;
2923                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
2924                         int save_mode = file->mode;
2925                         /* Make sure that this directory doesn't duplicate a
2926                          * non-directory earlier in the list. */
2927                         flist->high = prev_i;
2928                         file->mode = S_IFREG;
2929                         j = flist_find(flist, file);
2930                         file->mode = save_mode;
2931                 } else
2932                         j = -1;
2933                 if (j >= 0) {
2934                         int keep, drop;
2935                         /* If one is a dir and the other is not, we want to
2936                          * keep the dir because it might have contents in the
2937                          * list.  Otherwise keep the first one. */
2938                         if (S_ISDIR(file->mode)) {
2939                                 struct file_struct *fp = flist->sorted[j];
2940                                 if (!S_ISDIR(fp->mode))
2941                                         keep = i, drop = j;
2942                                 else {
2943                                         if (am_sender)
2944                                                 file->flags |= FLAG_DUPLICATE;
2945                                         else { /* Make sure we merge our vital flags. */
2946                                                 fp->flags |= file->flags & (FLAG_TOP_DIR|FLAG_CONTENT_DIR);
2947                                                 fp->flags &= file->flags | ~FLAG_IMPLIED_DIR;
2948                                         }
2949                                         keep = j, drop = i;
2950                                 }
2951                         } else
2952                                 keep = j, drop = i;
2953
2954                         if (!am_sender) {
2955                                 if (DEBUG_GTE(DUP, 1)) {
2956                                         rprintf(FINFO,
2957                                             "removing duplicate name %s from file list (%d)\n",
2958                                             f_name(file, fbuf), drop + flist->ndx_start);
2959                                 }
2960                                 clear_file(flist->sorted[drop]);
2961                         }
2962
2963                         if (keep == i) {
2964                                 if (flist->low == drop) {
2965                                         for (j = drop + 1;
2966                                              j < i && !F_IS_ACTIVE(flist->sorted[j]);
2967                                              j++) {}
2968                                         flist->low = j;
2969                                 }
2970                                 prev_i = i;
2971                         }
2972                 } else
2973                         prev_i = i;
2974         }
2975         flist->high = prev_i;
2976
2977         if (strip_root) {
2978                 /* We need to strip off the leading slashes for relative
2979                  * paths, but this must be done _after_ the sorting phase. */
2980                 for (i = flist->low; i <= flist->high; i++) {
2981                         struct file_struct *file = flist->sorted[i];
2982
2983                         if (!file->dirname)
2984                                 continue;
2985                         while (*file->dirname == '/')
2986                                 file->dirname++;
2987                         if (!*file->dirname)
2988                                 file->dirname = NULL;
2989                 }
2990         }
2991
2992         if (prune_empty_dirs && !am_sender) {
2993                 int j, prev_depth = 0;
2994
2995                 prev_i = 0; /* It's OK that this isn't really true. */
2996
2997                 for (i = flist->low; i <= flist->high; i++) {
2998                         struct file_struct *fp, *file = flist->sorted[i];
2999
3000                         /* This temporarily abuses the F_DEPTH() value for a
3001                          * directory that is in a chain that might get pruned.
3002                          * We restore the old value if it gets a reprieve. */
3003                         if (S_ISDIR(file->mode) && F_DEPTH(file)) {
3004                                 /* Dump empty dirs when coming back down. */
3005                                 for (j = prev_depth; j >= F_DEPTH(file); j--) {
3006                                         fp = flist->sorted[prev_i];
3007                                         if (F_DEPTH(fp) >= 0)
3008                                                 break;
3009                                         prev_i = -F_DEPTH(fp)-1;
3010                                         clear_file(fp);
3011                                 }
3012                                 prev_depth = F_DEPTH(file);
3013                                 if (is_excluded(f_name(file, fbuf), 1, ALL_FILTERS)) {
3014                                         /* Keep dirs through this dir. */
3015                                         for (j = prev_depth-1; ; j--) {
3016                                                 fp = flist->sorted[prev_i];
3017                                                 if (F_DEPTH(fp) >= 0)
3018                                                         break;
3019                                                 prev_i = -F_DEPTH(fp)-1;
3020                                                 F_DEPTH(fp) = j;
3021                                         }
3022                                 } else
3023                                         F_DEPTH(file) = -prev_i-1;
3024                                 prev_i = i;
3025                         } else {
3026                                 /* Keep dirs through this non-dir. */
3027                                 for (j = prev_depth; ; j--) {
3028                                         fp = flist->sorted[prev_i];
3029                                         if (F_DEPTH(fp) >= 0)
3030                                                 break;
3031                                         prev_i = -F_DEPTH(fp)-1;
3032                                         F_DEPTH(fp) = j;
3033                                 }
3034                         }
3035                 }
3036                 /* Dump all remaining empty dirs. */
3037                 while (1) {
3038                         struct file_struct *fp = flist->sorted[prev_i];
3039                         if (F_DEPTH(fp) >= 0)
3040                                 break;
3041                         prev_i = -F_DEPTH(fp)-1;
3042                         clear_file(fp);
3043                 }
3044
3045                 for (i = flist->low; i <= flist->high; i++) {
3046                         if (F_IS_ACTIVE(flist->sorted[i]))
3047                                 break;
3048                 }
3049                 flist->low = i;
3050                 for (i = flist->high; i >= flist->low; i--) {
3051                         if (F_IS_ACTIVE(flist->sorted[i]))
3052                                 break;
3053                 }
3054                 flist->high = i;
3055         }
3056 }
3057
3058 static void output_flist(struct file_list *flist)
3059 {
3060         char uidbuf[16], gidbuf[16], depthbuf[16];
3061         struct file_struct *file;
3062         const char *root, *dir, *slash, *name, *trail;
3063         const char *who = who_am_i();
3064         int i;
3065
3066         rprintf(FINFO, "[%s] flist start=%d, used=%d, low=%d, high=%d\n",
3067                 who, flist->ndx_start, flist->used, flist->low, flist->high);
3068         for (i = 0; i < flist->used; i++) {
3069                 file = flist->files[i];
3070                 if ((am_root || am_sender) && uid_ndx) {
3071                         snprintf(uidbuf, sizeof uidbuf, " uid=%u",
3072                                  F_OWNER(file));
3073                 } else
3074                         *uidbuf = '\0';
3075                 if (gid_ndx) {
3076                         static char parens[] = "(\0)\0\0\0";
3077                         char *pp = parens + (file->flags & FLAG_SKIP_GROUP ? 0 : 3);
3078                         snprintf(gidbuf, sizeof gidbuf, " gid=%s%u%s",
3079                                  pp, F_GROUP(file), pp + 2);
3080                 } else
3081                         *gidbuf = '\0';
3082                 if (!am_sender)
3083                         snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file));
3084                 if (F_IS_ACTIVE(file)) {
3085                         root = am_sender ? NS(F_PATHNAME(file)) : depthbuf;
3086                         if ((dir = file->dirname) == NULL)
3087                                 dir = slash = "";
3088                         else
3089                                 slash = "/";
3090                         name = file->basename;
3091                         trail = S_ISDIR(file->mode) ? "/" : "";
3092                 } else
3093                         root = dir = slash = name = trail = "";
3094                 rprintf(FINFO,
3095                         "[%s] i=%d %s %s%s%s%s mode=0%o len=%s%s%s flags=%x\n",
3096                         who, i + flist->ndx_start,
3097                         root, dir, slash, name, trail,
3098                         (int)file->mode, comma_num(F_LENGTH(file)),
3099                         uidbuf, gidbuf, file->flags);
3100         }
3101 }
3102
3103 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
3104 enum fnc_type { t_PATH, t_ITEM };
3105
3106 static int found_prefix;
3107
3108 /* Compare the names of two file_struct entities, similar to how strcmp()
3109  * would do if it were operating on the joined strings.
3110  *
3111  * Some differences beginning with protocol_version 29: (1) directory names
3112  * are compared with an assumed trailing slash so that they compare in a
3113  * way that would cause them to sort immediately prior to any content they
3114  * may have; (2) a directory of any name compares after a non-directory of
3115  * any name at the same depth; (3) a directory with name "." compares prior
3116  * to anything else.  These changes mean that a directory and a non-dir
3117  * with the same name will not compare as equal (protocol_version >= 29).
3118  *
3119  * The dirname component can be an empty string, but the basename component
3120  * cannot (and never is in the current codebase).  The basename component
3121  * may be NULL (for a removed item), in which case it is considered to be
3122  * after any existing item. */
3123 int f_name_cmp(const struct file_struct *f1, const struct file_struct *f2)
3124 {
3125         int dif;
3126         const uchar *c1, *c2;
3127         enum fnc_state state1, state2;
3128         enum fnc_type type1, type2;
3129         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
3130
3131         if (!f1 || !F_IS_ACTIVE(f1)) {
3132                 if (!f2 || !F_IS_ACTIVE(f2))
3133                         return 0;
3134                 return -1;
3135         }
3136         if (!f2 || !F_IS_ACTIVE(f2))
3137                 return 1;
3138
3139         c1 = (uchar*)f1->dirname;
3140         c2 = (uchar*)f2->dirname;
3141         if (c1 == c2)
3142                 c1 = c2 = NULL;
3143         if (!c1) {
3144                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
3145                 c1 = (const uchar*)f1->basename;
3146                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
3147                         type1 = t_ITEM;
3148                         state1 = s_TRAILING;
3149                         c1 = (uchar*)"";
3150                 } else
3151                         state1 = s_BASE;
3152         } else {
3153                 type1 = t_path;
3154                 state1 = s_DIR;
3155         }
3156         if (!c2) {
3157                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
3158                 c2 = (const uchar*)f2->basename;
3159                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
3160                         type2 = t_ITEM;
3161                         state2 = s_TRAILING;
3162                         c2 = (uchar*)"";
3163                 } else
3164                         state2 = s_BASE;
3165         } else {
3166                 type2 = t_path;
3167                 state2 = s_DIR;
3168         }
3169
3170         if (type1 != type2)
3171                 return type1 == t_PATH ? 1 : -1;
3172
3173         do {
3174                 if (!*c1) {
3175                         switch (state1) {
3176                         case s_DIR:
3177                                 state1 = s_SLASH;
3178                                 c1 = (uchar*)"/";
3179                                 break;
3180                         case s_SLASH:
3181                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
3182                                 c1 = (const uchar*)f1->basename;
3183                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
3184                                         type1 = t_ITEM;
3185                                         state1 = s_TRAILING;
3186                                         c1 = (uchar*)"";
3187                                 } else
3188                                         state1 = s_BASE;
3189                                 break;
3190                         case s_BASE:
3191                                 state1 = s_TRAILING;
3192                                 if (type1 == t_PATH) {
3193                                         c1 = (uchar*)"/";
3194                                         break;
3195                                 }
3196                                 /* FALL THROUGH */
3197                         case s_TRAILING:
3198                                 type1 = t_ITEM;
3199                                 break;
3200                         }
3201                         if (*c2 && type1 != type2)
3202                                 return type1 == t_PATH ? 1 : -1;
3203                 }
3204                 if (!*c2) {
3205                         switch (state2) {
3206                         case s_DIR:
3207                                 state2 = s_SLASH;
3208                                 c2 = (uchar*)"/";
3209                                 break;
3210                         case s_SLASH:
3211                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
3212                                 c2 = (const uchar*)f2->basename;
3213                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
3214                                         type2 = t_ITEM;
3215                                         state2 = s_TRAILING;
3216                                         c2 = (uchar*)"";
3217                                 } else
3218                                         state2 = s_BASE;
3219                                 break;
3220                         case s_BASE:
3221                                 state2 = s_TRAILING;
3222                                 if (type2 == t_PATH) {
3223                                         c2 = (uchar*)"/";
3224                                         break;
3225                                 }
3226                                 /* FALL THROUGH */
3227                         case s_TRAILING:
3228                                 found_prefix = 1;
3229                                 if (!*c1)
3230                                         return 0;
3231                                 type2 = t_ITEM;
3232                                 break;
3233                         }
3234                         if (type1 != type2)
3235                                 return type1 == t_PATH ? 1 : -1;
3236                 }
3237         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
3238
3239         return dif;
3240 }
3241
3242 /* Returns 1 if f1's filename has all of f2's filename as a prefix.  This does
3243  * not match if f2's basename is not an exact match of a path element in f1.
3244  * E.g. /path/foo is not a prefix of /path/foobar/baz, but /path/foobar is. */
3245 int f_name_has_prefix(const struct file_struct *f1, const struct file_struct *f2)
3246 {
3247         found_prefix = 0;
3248         f_name_cmp(f1, f2);
3249         return found_prefix;
3250 }
3251
3252 char *f_name_buf(void)
3253 {
3254         static char names[5][MAXPATHLEN];
3255         static unsigned int n;
3256
3257         n = (n + 1) % (sizeof names / sizeof names[0]);
3258
3259         return names[n];
3260 }
3261
3262 /* Return a copy of the full filename of a flist entry, using the indicated
3263  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
3264  * done because we checked the size when creating the file_struct entry.
3265  */
3266 char *f_name(const struct file_struct *f, char *fbuf)
3267 {
3268         if (!f || !F_IS_ACTIVE(f))
3269                 return NULL;
3270
3271         if (!fbuf)
3272                 fbuf = f_name_buf();
3273
3274         if (f->dirname) {
3275                 int len = strlen(f->dirname);
3276                 memcpy(fbuf, f->dirname, len);
3277                 fbuf[len] = '/';
3278                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
3279         } else
3280                 strlcpy(fbuf, f->basename, MAXPATHLEN);
3281
3282         return fbuf;
3283 }
3284
3285 /* Do a non-recursive scan of the named directory, possibly ignoring all
3286  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
3287  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
3288  * buffer (the functions we call will append names onto the end, but the old
3289  * dir value will be restored on exit). */
3290 struct file_list *get_dirlist(char *dirname, int dlen, int flags)
3291 {
3292         struct file_list *dirlist;
3293         char dirbuf[MAXPATHLEN];
3294         int save_recurse = recurse;
3295         int save_xfer_dirs = xfer_dirs;
3296         int save_prune_empty_dirs = prune_empty_dirs;
3297         int senddir_fd = flags & GDL_IGNORE_FILTER_RULES ? -2 : -1;
3298         int senddir_flags = FLAG_CONTENT_DIR;
3299
3300         if (dlen < 0) {
3301                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
3302                 if (dlen >= MAXPATHLEN)
3303                         return NULL;
3304                 dirname = dirbuf;
3305         }
3306
3307         dirlist = flist_new(FLIST_TEMP, "get_dirlist");
3308
3309         if (flags & GDL_PERHAPS_DIR)
3310                 senddir_flags |= FLAG_PERHAPS_DIR;
3311
3312         recurse = 0;
3313         xfer_dirs = 1;
3314         send_directory(senddir_fd, dirlist, dirname, dlen, senddir_flags);
3315         xfer_dirs = save_xfer_dirs;
3316         recurse = save_recurse;
3317         if (INFO_GTE(PROGRESS, 1))
3318                 flist_count_offset += dirlist->used;
3319
3320         prune_empty_dirs = 0;
3321         dirlist->sorted = dirlist->files;
3322         flist_sort_and_clean(dirlist, 0);
3323         prune_empty_dirs = save_prune_empty_dirs;
3324
3325         if (DEBUG_GTE(FLIST, 3))
3326                 output_flist(dirlist);
3327
3328         return dirlist;
3329 }