flist.c

   1 /*
   2  * Generate and receive file lists.
   3  *
   4  * Copyright (C) 1996 Andrew Tridgell
   5  * Copyright (C) 1996 Paul Mackerras
   6  * Copyright (C) 2001, 2002 Martin Pool <mbp@samba.org>
   7  * Copyright (C) 2002-2008 Wayne Davison
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 3 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, visit the http://fsf.org website.
  21  */
  22
  23 #include "rsync.h"
  24 #include "ifuncs.h"
  25 #include "rounding.h"
  26 #include "io.h"
  27
  28 extern int verbose;
  29 extern int am_root;
  30 extern int am_server;
  31 extern int am_daemon;
  32 extern int am_sender;
  33 extern int am_generator;
  34 extern int inc_recurse;
  35 extern int do_progress;
  36 extern int always_checksum;
  37 extern int module_id;
  38 extern int ignore_errors;
  39 extern int numeric_ids;
  40 extern int recurse;
  41 extern int use_qsort;
  42 extern int xfer_dirs;
  43 extern int filesfrom_fd;
  44 extern int one_file_system;
  45 extern int copy_dirlinks;
  46 extern int keep_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 uid_ndx;
  56 extern int gid_ndx;
  57 extern int eol_nulls;
  58 extern int relative_paths;
  59 extern int implied_dirs;
  60 extern int file_extra_cnt;
  61 extern int ignore_perishable;
  62 extern int non_perishable_cnt;
  63 extern int prune_empty_dirs;
  64 extern int copy_links;
  65 extern int copy_unsafe_links;
  66 extern int protocol_version;
  67 extern int sanitize_paths;
  68 extern int munge_symlinks;
  69 extern int need_unsorted_flist;
  70 extern int unsort_ndx;
  71 extern struct stats stats;
  72 extern char *filesfrom_host;
  73
  74 extern char curr_dir[MAXPATHLEN];
  75
  76 extern struct chmod_mode_struct *chmod_modes;
  77
  78 extern struct filter_list_struct filter_list;
  79 extern struct filter_list_struct daemon_filter_list;
  80
  81 #ifdef ICONV_OPTION
  82 extern int filesfrom_convert;
  83 extern iconv_t ic_send, ic_recv;
  84 #endif
  85
  86 #define PTR_SIZE (sizeof (struct file_struct *))
  87
  88 int io_error;
  89 int checksum_len;
  90 dev_t filesystem_dev; /* used to implement -x */
  91
  92 struct file_list *cur_flist, *first_flist, *dir_flist;
  93 int send_dir_ndx = -1, send_dir_depth = -1;
  94 int flist_cnt = 0; /* how many (non-tmp) file list objects exist */
  95 int file_total = 0; /* total of all active items over all file-lists */
  96 int flist_eof = 0; /* all the file-lists are now known */
  97
  98 #define NORMAL_NAME 0
  99 #define SLASH_ENDING_NAME 1
 100 #define DOTDIR_NAME 2
 101
 102 /* Starting from protocol version 26, we always use 64-bit ino_t and dev_t
 103  * internally, even if this platform does not allow files to have 64-bit inums.
 104  * The only exception is if we're on a platform with no 64-bit type at all.
 105  *
 106  * Because we use read_longint() to get these off the wire, if you transfer
 107  * devices or (for protocols < 30) hardlinks with dev or inum > 2**32 to a
 108  * machine with no 64-bit types then you will get an overflow error.
 109  *
 110  * Note that if you transfer devices from a 64-bit-devt machine (say, Solaris)
 111  * to a 32-bit-devt machine (say, Linux-2.2/x86) then the device numbers will
 112  * be truncated.  But it's a kind of silly thing to do anyhow. */
 113
 114 /* The tmp_* vars are used as a cache area by make_file() to store data
 115  * that the sender doesn't need to remember in its file list.  The data
 116  * will survive just long enough to be used by send_file_entry(). */
 117 static dev_t tmp_rdev;
 118 #ifdef SUPPORT_HARD_LINKS
 119 static int64 tmp_dev, tmp_ino;
 120 #endif
 121 static char tmp_sum[MAX_DIGEST_LEN];
 122
 123 static char empty_sum[MAX_DIGEST_LEN];
 124 static int flist_count_offset; /* for --delete --progress */
 125 static int dir_count = 0;
 126
 127 static void flist_sort_and_clean(struct file_list *flist, int strip_root);
 128 static void output_flist(struct file_list *flist);
 129
 130 void init_flist(void)
 131 {
 132         if (verbose > 4) {
 133                 rprintf(FINFO, "FILE_STRUCT_LEN=%d, EXTRA_LEN=%d\n",
 134                         (int)FILE_STRUCT_LEN, (int)EXTRA_LEN);
 135         }
 136         checksum_len = protocol_version < 21 ? 2
 137                      : protocol_version < 30 ? MD4_DIGEST_LEN
 138                      : MD5_DIGEST_LEN;
 139 }
 140
 141 static int show_filelist_p(void)
 142 {
 143         return verbose && xfer_dirs && !am_server && !inc_recurse;
 144 }
 145
 146 static void start_filelist_progress(char *kind)
 147 {
 148         rprintf(FCLIENT, "%s ... ", kind);
 149         if (verbose > 1 || do_progress)
 150                 rprintf(FCLIENT, "\n");
 151         rflush(FINFO);
 152 }
 153
 154 static void emit_filelist_progress(int count)
 155 {
 156         rprintf(FCLIENT, " %d files...\r", count);
 157 }
 158
 159 static void maybe_emit_filelist_progress(int count)
 160 {
 161         if (do_progress && show_filelist_p() && (count % 100) == 0)
 162                 emit_filelist_progress(count);
 163 }
 164
 165 static void finish_filelist_progress(const struct file_list *flist)
 166 {
 167         if (do_progress) {
 168                 /* This overwrites the progress line */
 169                 rprintf(FINFO, "%d file%sto consider\n",
 170                         flist->used, flist->used == 1 ? " " : "s ");
 171         } else
 172                 rprintf(FINFO, "done\n");
 173 }
 174
 175 void show_flist_stats(void)
 176 {
 177         /* Nothing yet */
 178 }
 179
 180 /* Stat either a symlink or its referent, depending on the settings of
 181  * copy_links, copy_unsafe_links, etc.  Returns -1 on error, 0 on success.
 182  *
 183  * If path is the name of a symlink, then the linkbuf buffer (which must hold
 184  * MAXPATHLEN chars) will be set to the symlink's target string.
 185  *
 186  * The stat structure pointed to by stp will contain information about the
 187  * link or the referent as appropriate, if they exist. */
 188 static int readlink_stat(const char *path, STRUCT_STAT *stp, char *linkbuf)
 189 {
 190 #ifdef SUPPORT_LINKS
 191         if (link_stat(path, stp, copy_dirlinks) < 0)
 192                 return -1;
 193         if (S_ISLNK(stp->st_mode)) {
 194                 int llen = readlink(path, linkbuf, MAXPATHLEN - 1);
 195                 if (llen < 0)
 196                         return -1;
 197                 linkbuf[llen] = '\0';
 198                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 199                         if (verbose > 1) {
 200                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 201                                         path, linkbuf);
 202                         }
 203                         return x_stat(path, stp, NULL);
 204                 }
 205                 if (munge_symlinks && am_sender && llen > SYMLINK_PREFIX_LEN
 206                  && strncmp(linkbuf, SYMLINK_PREFIX, SYMLINK_PREFIX_LEN) == 0) {
 207                         memmove(linkbuf, linkbuf + SYMLINK_PREFIX_LEN,
 208                                 llen - SYMLINK_PREFIX_LEN + 1);
 209                 }
 210         }
 211         return 0;
 212 #else
 213         return x_stat(path, stp, NULL);
 214 #endif
 215 }
 216
 217 int link_stat(const char *path, STRUCT_STAT *stp, int follow_dirlinks)
 218 {
 219 #ifdef SUPPORT_LINKS
 220         if (copy_links)
 221                 return x_stat(path, stp, NULL);
 222         if (x_lstat(path, stp, NULL) < 0)
 223                 return -1;
 224         if (follow_dirlinks && S_ISLNK(stp->st_mode)) {
 225                 STRUCT_STAT st;
 226                 if (x_stat(path, &st, NULL) == 0 && S_ISDIR(st.st_mode))
 227                         *stp = st;
 228         }
 229         return 0;
 230 #else
 231         return x_stat(path, stp, NULL);
 232 #endif
 233 }
 234
 235 static inline int is_daemon_excluded(const char *fname, int is_dir)
 236 {
 237         if (daemon_filter_list.head
 238          && check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
 239                 errno = ENOENT;
 240                 return 1;
 241         }
 242         return 0;
 243 }
 244
 245 static inline int path_is_daemon_excluded(char *path, int ignore_filename)
 246 {
 247         if (daemon_filter_list.head && path) {
 248                 char *slash = path;
 249
 250                 while ((slash = strchr(slash+1, '/')) != NULL) {
 251                         int ret;
 252                         *slash = '\0';
 253                         ret = check_filter(&daemon_filter_list, FLOG, path, 1);
 254                         *slash = '/';
 255                         if (ret < 0) {
 256                                 errno = ENOENT;
 257                                 return 1;
 258                         }
 259                 }
 260
 261                 if (!ignore_filename
 262                  && check_filter(&daemon_filter_list, FLOG, path, 1) < 0) {
 263                         errno = ENOENT;
 264                         return 1;
 265                 }
 266         }
 267
 268         return 0;
 269 }
 270
 271 /* This function is used to check if a file should be included/excluded
 272  * from the list of files based on its name and type etc.  The value of
 273  * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
 274 static int is_excluded(const char *fname, int is_dir, int filter_level)
 275 {
 276 #if 0 /* This currently never happens, so avoid a useless compare. */
 277         if (filter_level == NO_FILTERS)
 278                 return 0;
 279 #endif
 280         if (is_daemon_excluded(fname, is_dir))
 281                 return 1;
 282         if (filter_level != ALL_FILTERS)
 283                 return 0;
 284         if (filter_list.head
 285             && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
 286                 return 1;
 287         return 0;
 288 }
 289
 290 static void send_directory(int f, struct file_list *flist,
 291                            char *fbuf, int len, int flags);
 292
 293 static const char *pathname, *orig_dir;
 294 static int pathname_len;
 295
 296
 297 /* Make sure flist can hold at least flist->used + extra entries. */
 298 static void flist_expand(struct file_list *flist, int extra)
 299 {
 300         struct file_struct **new_ptr;
 301
 302         if (flist->used + extra <= flist->malloced)
 303                 return;
 304
 305         if (flist->malloced < FLIST_START)
 306                 flist->malloced = FLIST_START;
 307         else if (flist->malloced >= FLIST_LINEAR)
 308                 flist->malloced += FLIST_LINEAR;
 309         else
 310                 flist->malloced *= 2;
 311
 312         /* In case count jumped or we are starting the list
 313          * with a known size just set it. */
 314         if (flist->malloced < flist->used + extra)
 315                 flist->malloced = flist->used + extra;
 316
 317         new_ptr = realloc_array(flist->files, struct file_struct *,
 318                                 flist->malloced);
 319
 320         if (verbose >= 2 && flist->malloced != FLIST_START) {
 321                 rprintf(FCLIENT, "[%s] expand file_list pointer array to %.0f bytes, did%s move\n",
 322                     who_am_i(),
 323                     (double)sizeof flist->files[0] * flist->malloced,
 324                     (new_ptr == flist->files) ? " not" : "");
 325         }
 326
 327         flist->files = new_ptr;
 328
 329         if (!flist->files)
 330                 out_of_memory("flist_expand");
 331 }
 332
 333 static void flist_done_allocating(struct file_list *flist)
 334 {
 335         void *ptr = pool_boundary(flist->file_pool, 8*1024);
 336         if (flist->pool_boundary == ptr)
 337                 flist->pool_boundary = NULL; /* list didn't use any pool memory */
 338         else
 339                 flist->pool_boundary = ptr;
 340 }
 341
 342 int push_pathname(const char *dir, int len)
 343 {
 344         if (dir == pathname)
 345                 return 1;
 346
 347         if (!orig_dir)
 348                 orig_dir = strdup(curr_dir);
 349
 350         if (pathname && !pop_dir(orig_dir)) {
 351                 rsyserr(FERROR, errno, "pop_dir %s failed",
 352                         full_fname(orig_dir));
 353                 exit_cleanup(RERR_FILESELECT);
 354         }
 355
 356         if (dir && !push_dir(dir, 0)) {
 357                 io_error |= IOERR_GENERAL;
 358                 rsyserr(FERROR, errno, "push_dir %s failed in %s",
 359                         full_fname(dir), curr_dir);
 360                 return 0;
 361         }
 362
 363         pathname = dir;
 364         pathname_len = len >= 0 ? len : dir ? (int)strlen(dir) : 0;
 365
 366         return 1;
 367 }
 368
 369 static void send_file_entry(int f, const char *fname, struct file_struct *file, int ndx, int first_ndx)
 370 {
 371         static time_t modtime;
 372         static mode_t mode;
 373 #ifdef SUPPORT_HARD_LINKS
 374         static int64 dev;
 375 #endif
 376         static dev_t rdev;
 377         static uint32 rdev_major;
 378         static uid_t uid;
 379         static gid_t gid;
 380         static const char *user_name, *group_name;
 381         static char lastname[MAXPATHLEN];
 382         int first_hlink_ndx = -1;
 383         int l1, l2;
 384         int xflags;
 385
 386         /* Initialize starting value of xflags. */
 387         if (protocol_version >= 30 && S_ISDIR(file->mode)) {
 388                 dir_count++;
 389                 if (file->flags & FLAG_CONTENT_DIR)
 390                         xflags = file->flags & FLAG_TOP_DIR;
 391                 else if (file->flags & FLAG_IMPLIED_DIR)
 392                         xflags = XMIT_TOP_DIR | XMIT_NO_CONTENT_DIR;
 393                 else
 394                         xflags = XMIT_NO_CONTENT_DIR;
 395         } else
 396                 xflags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */
 397
 398         if (file->mode == mode)
 399                 xflags |= XMIT_SAME_MODE;
 400         else
 401                 mode = file->mode;
 402
 403         if ((preserve_devices && IS_DEVICE(mode))
 404          || (preserve_specials && IS_SPECIAL(mode))) {
 405                 if (protocol_version < 28) {
 406                         if (tmp_rdev == rdev)
 407                                 xflags |= XMIT_SAME_RDEV_pre28;
 408                         else
 409                                 rdev = tmp_rdev;
 410                 } else {
 411                         rdev = tmp_rdev;
 412                         if ((uint32)major(rdev) == rdev_major)
 413                                 xflags |= XMIT_SAME_RDEV_MAJOR;
 414                         else
 415                                 rdev_major = major(rdev);
 416                         if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu)
 417                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
 418                 }
 419         } else if (protocol_version < 28)
 420                 rdev = MAKEDEV(0, 0);
 421         if (!preserve_uid || ((uid_t)F_OWNER(file) == uid && *lastname))
 422                 xflags |= XMIT_SAME_UID;
 423         else {
 424                 uid = F_OWNER(file);
 425                 if (!numeric_ids) {
 426                         user_name = add_uid(uid);
 427                         if (inc_recurse && user_name)
 428                                 xflags |= XMIT_USER_NAME_FOLLOWS;
 429                 }
 430         }
 431         if (!preserve_gid || ((gid_t)F_GROUP(file) == gid && *lastname))
 432                 xflags |= XMIT_SAME_GID;
 433         else {
 434                 gid = F_GROUP(file);
 435                 if (!numeric_ids) {
 436                         group_name = add_gid(gid);
 437                         if (inc_recurse && group_name)
 438                                 xflags |= XMIT_GROUP_NAME_FOLLOWS;
 439                 }
 440         }
 441         if (file->modtime == modtime)
 442                 xflags |= XMIT_SAME_TIME;
 443         else
 444                 modtime = file->modtime;
 445
 446 #ifdef SUPPORT_HARD_LINKS
 447         if (tmp_dev != 0) {
 448                 if (protocol_version >= 30) {
 449                         struct ht_int64_node *np = idev_find(tmp_dev, tmp_ino);
 450                         first_hlink_ndx = (int32)(long)np->data - 1;
 451                         if (first_hlink_ndx < 0) {
 452                                 np->data = (void*)(long)(first_ndx + ndx + 1);
 453                                 xflags |= XMIT_HLINK_FIRST;
 454                         }
 455                 } else {
 456                         if (tmp_dev == dev) {
 457                                 if (protocol_version >= 28)
 458                                         xflags |= XMIT_SAME_DEV_pre30;
 459                         } else
 460                                 dev = tmp_dev;
 461                 }
 462                 xflags |= XMIT_HLINKED;
 463         }
 464 #endif
 465
 466         for (l1 = 0;
 467             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 468             l1++) {}
 469         l2 = strlen(fname+l1);
 470
 471         if (l1 > 0)
 472                 xflags |= XMIT_SAME_NAME;
 473         if (l2 > 255)
 474                 xflags |= XMIT_LONG_NAME;
 475
 476         /* We must make sure we don't send a zero flag byte or the
 477          * other end will terminate the flist transfer.  Note that
 478          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 479          * it's harmless way to add a bit to the first flag byte. */
 480         if (protocol_version >= 28) {
 481                 if (!xflags && !S_ISDIR(mode))
 482                         xflags |= XMIT_TOP_DIR;
 483                 if ((xflags & 0xFF00) || !xflags) {
 484                         xflags |= XMIT_EXTENDED_FLAGS;
 485                         write_shortint(f, xflags);
 486                 } else
 487                         write_byte(f, xflags);
 488         } else {
 489                 if (!(xflags & 0xFF))
 490                         xflags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
 491                 write_byte(f, xflags);
 492         }
 493         if (xflags & XMIT_SAME_NAME)
 494                 write_byte(f, l1);
 495         if (xflags & XMIT_LONG_NAME)
 496                 write_varint30(f, l2);
 497         else
 498                 write_byte(f, l2);
 499         write_buf(f, fname + l1, l2);
 500
 501         if (first_hlink_ndx >= 0) {
 502                 write_varint(f, first_hlink_ndx);
 503                 if (first_hlink_ndx >= first_ndx)
 504                         goto the_end;
 505         }
 506
 507         write_varlong30(f, F_LENGTH(file), 3);
 508         if (!(xflags & XMIT_SAME_TIME)) {
 509                 if (protocol_version >= 30)
 510                         write_varlong(f, modtime, 4);
 511                 else
 512                         write_int(f, modtime);
 513         }
 514         if (!(xflags & XMIT_SAME_MODE))
 515                 write_int(f, to_wire_mode(mode));
 516         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
 517                 if (protocol_version < 30)
 518                         write_int(f, uid);
 519                 else {
 520                         write_varint(f, uid);
 521                         if (xflags & XMIT_USER_NAME_FOLLOWS) {
 522                                 int len = strlen(user_name);
 523                                 write_byte(f, len);
 524                                 write_buf(f, user_name, len);
 525                         }
 526                 }
 527         }
 528         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
 529                 if (protocol_version < 30)
 530                         write_int(f, gid);
 531                 else {
 532                         write_varint(f, gid);
 533                         if (xflags & XMIT_GROUP_NAME_FOLLOWS) {
 534                                 int len = strlen(group_name);
 535                                 write_byte(f, len);
 536                                 write_buf(f, group_name, len);
 537                         }
 538                 }
 539         }
 540         if ((preserve_devices && IS_DEVICE(mode))
 541          || (preserve_specials && IS_SPECIAL(mode))) {
 542                 if (protocol_version < 28) {
 543                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 544                                 write_int(f, (int)rdev);
 545                 } else {
 546                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 547                                 write_varint30(f, major(rdev));
 548                         if (protocol_version >= 30)
 549                                 write_varint(f, minor(rdev));
 550                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 551                                 write_byte(f, minor(rdev));
 552                         else
 553                                 write_int(f, minor(rdev));
 554                 }
 555         }
 556
 557 #ifdef SUPPORT_LINKS
 558         if (preserve_links && S_ISLNK(mode)) {
 559                 const char *sl = F_SYMLINK(file);
 560                 int len = strlen(sl);
 561                 write_varint30(f, len);
 562                 write_buf(f, sl, len);
 563         }
 564 #endif
 565
 566 #ifdef SUPPORT_HARD_LINKS
 567         if (tmp_dev != 0 && protocol_version < 30) {
 568                 if (protocol_version < 26) {
 569                         /* 32-bit dev_t and ino_t */
 570                         write_int(f, (int32)dev);
 571                         write_int(f, (int32)tmp_ino);
 572                 } else {
 573                         /* 64-bit dev_t and ino_t */
 574                         if (!(xflags & XMIT_SAME_DEV_pre30))
 575                                 write_longint(f, dev);
 576                         write_longint(f, tmp_ino);
 577                 }
 578         }
 579 #endif
 580
 581         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 582                 const char *sum;
 583                 if (S_ISREG(mode))
 584                         sum = tmp_sum;
 585                 else {
 586                         /* Prior to 28, we sent a useless set of nulls. */
 587                         sum = empty_sum;
 588                 }
 589                 write_buf(f, sum, checksum_len);
 590         }
 591
 592   the_end:
 593         strlcpy(lastname, fname, MAXPATHLEN);
 594
 595         if (S_ISREG(mode) || S_ISLNK(mode))
 596                 stats.total_size += F_LENGTH(file);
 597 }
 598
 599 static struct file_struct *recv_file_entry(struct file_list *flist,
 600                                            int xflags, int f)
 601 {
 602         static int64 modtime;
 603         static mode_t mode;
 604 #ifdef SUPPORT_HARD_LINKS
 605         static int64 dev;
 606 #endif
 607         static dev_t rdev;
 608         static uint32 rdev_major;
 609         static uid_t uid;
 610         static gid_t gid;
 611         static uint16 gid_flags;
 612         static char lastname[MAXPATHLEN], *lastdir;
 613         static int lastdir_depth, lastdir_len = -1;
 614         static unsigned int del_hier_name_len = 0;
 615         static int in_del_hier = 0;
 616         char thisname[MAXPATHLEN];
 617         unsigned int l1 = 0, l2 = 0;
 618         int alloc_len, basename_len, linkname_len;
 619         int extra_len = file_extra_cnt * EXTRA_LEN;
 620         int first_hlink_ndx = -1;
 621         OFF_T file_length;
 622         const char *basename;
 623         struct file_struct *file;
 624         alloc_pool_t *pool;
 625         char *bp;
 626
 627         if (xflags & XMIT_SAME_NAME)
 628                 l1 = read_byte(f);
 629
 630         if (xflags & XMIT_LONG_NAME)
 631                 l2 = read_varint30(f);
 632         else
 633                 l2 = read_byte(f);
 634
 635         if (l2 >= MAXPATHLEN - l1) {
 636                 rprintf(FERROR,
 637                         "overflow: xflags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
 638                         xflags, l1, l2, lastname, who_am_i());
 639                 overflow_exit("recv_file_entry");
 640         }
 641
 642         strlcpy(thisname, lastname, l1 + 1);
 643         read_sbuf(f, &thisname[l1], l2);
 644         thisname[l1 + l2] = 0;
 645
 646         /* Abuse basename_len for a moment... */
 647         basename_len = strlcpy(lastname, thisname, MAXPATHLEN);
 648
 649 #ifdef ICONV_OPTION
 650         if (ic_recv != (iconv_t)-1) {
 651                 xbuf outbuf, inbuf;
 652
 653                 INIT_CONST_XBUF(outbuf, thisname);
 654                 INIT_XBUF(inbuf, lastname, basename_len, -1);
 655
 656                 if (iconvbufs(ic_recv, &inbuf, &outbuf, 0) < 0) {
 657                         io_error |= IOERR_GENERAL;
 658                         rprintf(FINFO,
 659                             "[%s] cannot convert filename: %s (%s)\n",
 660                             who_am_i(), lastname, strerror(errno));
 661                         outbuf.len = 0;
 662                 }
 663                 outbuf.buf[outbuf.len] = '\0';
 664         }
 665 #endif
 666
 667         if (*thisname)
 668                 clean_fname(thisname, 0);
 669
 670         if (sanitize_paths)
 671                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
 672
 673         if ((basename = strrchr(thisname, '/')) != NULL) {
 674                 int len = basename++ - thisname;
 675                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
 676                         lastdir = new_array(char, len + 1);
 677                         memcpy(lastdir, thisname, len);
 678                         lastdir[len] = '\0';
 679                         lastdir_len = len;
 680                         lastdir_depth = count_dir_elements(lastdir);
 681                 }
 682         } else
 683                 basename = thisname;
 684         basename_len = strlen(basename) + 1; /* count the '\0' */
 685
 686 #ifdef SUPPORT_HARD_LINKS
 687         if (protocol_version >= 30
 688          && BITS_SETnUNSET(xflags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
 689                 first_hlink_ndx = read_varint(f);
 690                 if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->ndx_start + flist->used) {
 691                         rprintf(FERROR,
 692                                 "hard-link reference out of range: %d (%d)\n",
 693                                 first_hlink_ndx, flist->ndx_start + flist->used);
 694                         exit_cleanup(RERR_PROTOCOL);
 695                 }
 696                 if (first_hlink_ndx >= flist->ndx_start) {
 697                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 698                         file_length = F_LENGTH(first);
 699                         modtime = first->modtime;
 700                         mode = first->mode;
 701                         if (preserve_uid)
 702                                 uid = F_OWNER(first);
 703                         if (preserve_gid)
 704                                 gid = F_GROUP(first);
 705                         if ((preserve_devices && IS_DEVICE(mode))
 706                          || (preserve_specials && IS_SPECIAL(mode))) {
 707                                 uint32 *devp = F_RDEV_P(first);
 708                                 rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
 709                                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 710                         }
 711                         if (preserve_links && S_ISLNK(mode))
 712                                 linkname_len = strlen(F_SYMLINK(first)) + 1;
 713                         else
 714                                 linkname_len = 0;
 715                         goto create_object;
 716                 }
 717         }
 718 #endif
 719
 720         file_length = read_varlong30(f, 3);
 721         if (!(xflags & XMIT_SAME_TIME)) {
 722                 if (protocol_version >= 30) {
 723                         modtime = read_varlong(f, 4);
 724 #if SIZEOF_TIME_T < SIZEOF_INT64
 725                         if (!am_generator && (int64)(time_t)modtime != modtime) {
 726                                 rprintf(FERROR_XFER,
 727                                     "Time value of %s truncated on receiver.\n",
 728                                     lastname);
 729                         }
 730 #endif
 731                 } else
 732                         modtime = read_int(f);
 733         }
 734         if (!(xflags & XMIT_SAME_MODE))
 735                 mode = from_wire_mode(read_int(f));
 736
 737         if (chmod_modes && !S_ISLNK(mode))
 738                 mode = tweak_mode(mode, chmod_modes);
 739
 740         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
 741                 if (protocol_version < 30)
 742                         uid = (uid_t)read_int(f);
 743                 else {
 744                         uid = (uid_t)read_varint(f);
 745                         if (xflags & XMIT_USER_NAME_FOLLOWS)
 746                                 uid = recv_user_name(f, uid);
 747                         else if (inc_recurse && am_root && !numeric_ids)
 748                                 uid = match_uid(uid);
 749                 }
 750         }
 751         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
 752                 if (protocol_version < 30)
 753                         gid = (gid_t)read_int(f);
 754                 else {
 755                         gid = (gid_t)read_varint(f);
 756                         gid_flags = 0;
 757                         if (xflags & XMIT_GROUP_NAME_FOLLOWS)
 758                                 gid = recv_group_name(f, gid, &gid_flags);
 759                         else if (inc_recurse && (!am_root || !numeric_ids))
 760                                 gid = match_gid(gid, &gid_flags);
 761                 }
 762         }
 763
 764         if ((preserve_devices && IS_DEVICE(mode))
 765          || (preserve_specials && IS_SPECIAL(mode))) {
 766                 if (protocol_version < 28) {
 767                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 768                                 rdev = (dev_t)read_int(f);
 769                 } else {
 770                         uint32 rdev_minor;
 771                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 772                                 rdev_major = read_varint30(f);
 773                         if (protocol_version >= 30)
 774                                 rdev_minor = read_varint(f);
 775                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 776                                 rdev_minor = read_byte(f);
 777                         else
 778                                 rdev_minor = read_int(f);
 779                         rdev = MAKEDEV(rdev_major, rdev_minor);
 780                 }
 781                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 782                 file_length = 0;
 783         } else if (protocol_version < 28)
 784                 rdev = MAKEDEV(0, 0);
 785
 786 #ifdef SUPPORT_LINKS
 787         if (preserve_links && S_ISLNK(mode)) {
 788                 linkname_len = read_varint30(f) + 1; /* count the '\0' */
 789                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 790                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 791                                 linkname_len - 1);
 792                         overflow_exit("recv_file_entry");
 793                 }
 794                 if (munge_symlinks)
 795                         linkname_len += SYMLINK_PREFIX_LEN;
 796         }
 797         else
 798 #endif
 799                 linkname_len = 0;
 800
 801 #ifdef SUPPORT_HARD_LINKS
 802   create_object:
 803         if (preserve_hard_links) {
 804                 if (protocol_version < 28 && S_ISREG(mode))
 805                         xflags |= XMIT_HLINKED;
 806                 if (xflags & XMIT_HLINKED)
 807                         extra_len += (inc_recurse+1) * EXTRA_LEN;
 808         }
 809 #endif
 810
 811 #ifdef SUPPORT_ACLS
 812         /* Directories need an extra int32 for the default ACL. */
 813         if (preserve_acls && S_ISDIR(mode))
 814                 extra_len += EXTRA_LEN;
 815 #endif
 816
 817         if (always_checksum && S_ISREG(mode))
 818                 extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
 819
 820         if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
 821                 extra_len += EXTRA_LEN;
 822
 823         if (inc_recurse && S_ISDIR(mode)) {
 824                 if (one_file_system) {
 825                         /* Room to save the dir's device for -x */
 826                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 827                 }
 828                 pool = dir_flist->file_pool;
 829         } else
 830                 pool = flist->file_pool;
 831
 832 #if EXTRA_ROUNDING > 0
 833         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
 834                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
 835 #endif
 836
 837         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
 838                   + linkname_len;
 839         bp = pool_alloc(pool, alloc_len, "recv_file_entry");
 840
 841         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
 842         bp += extra_len;
 843         file = (struct file_struct *)bp;
 844         bp += FILE_STRUCT_LEN;
 845
 846         memcpy(bp, basename, basename_len);
 847
 848 #ifdef SUPPORT_HARD_LINKS
 849         if (xflags & XMIT_HLINKED)
 850                 file->flags |= FLAG_HLINKED;
 851 #endif
 852         file->modtime = (time_t)modtime;
 853         file->len32 = (uint32)file_length;
 854         if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
 855                 file->flags |= FLAG_LENGTH64;
 856                 OPT_EXTRA(file, 0)->unum = (uint32)(file_length >> 32);
 857         }
 858         file->mode = mode;
 859         if (preserve_uid)
 860                 F_OWNER(file) = uid;
 861         if (preserve_gid) {
 862                 F_GROUP(file) = gid;
 863                 file->flags |= gid_flags;
 864         }
 865         if (unsort_ndx)
 866                 F_NDX(file) = flist->used + flist->ndx_start;
 867
 868         if (basename != thisname) {
 869                 file->dirname = lastdir;
 870                 F_DEPTH(file) = lastdir_depth + 1;
 871         } else
 872                 F_DEPTH(file) = 1;
 873
 874         if (S_ISDIR(mode)) {
 875                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
 876                         F_DEPTH(file)--;
 877                 if (protocol_version >= 30) {
 878                         if (!(xflags & XMIT_NO_CONTENT_DIR)) {
 879                                 if (xflags & XMIT_TOP_DIR)
 880                                         file->flags |= FLAG_TOP_DIR;
 881                                 file->flags |= FLAG_CONTENT_DIR;
 882                         } else if (xflags & XMIT_TOP_DIR)
 883                                 file->flags |= FLAG_IMPLIED_DIR;
 884                 } else if (xflags & XMIT_TOP_DIR) {
 885                         in_del_hier = recurse;
 886                         del_hier_name_len = F_DEPTH(file) == 0 ? 0 : l1 + l2;
 887                         if (relative_paths && del_hier_name_len > 2
 888                             && lastname[del_hier_name_len-1] == '.'
 889                             && lastname[del_hier_name_len-2] == '/')
 890                                 del_hier_name_len -= 2;
 891                         file->flags |= FLAG_TOP_DIR | FLAG_CONTENT_DIR;
 892                 } else if (in_del_hier) {
 893                         if (!relative_paths || !del_hier_name_len
 894                          || (l1 >= del_hier_name_len
 895                           && lastname[del_hier_name_len] == '/'))
 896                                 file->flags |= FLAG_CONTENT_DIR;
 897                         else
 898                                 in_del_hier = 0;
 899                 }
 900         }
 901
 902         if ((preserve_devices && IS_DEVICE(mode))
 903          || (preserve_specials && IS_SPECIAL(mode))) {
 904                 uint32 *devp = F_RDEV_P(file);
 905                 DEV_MAJOR(devp) = major(rdev);
 906                 DEV_MINOR(devp) = minor(rdev);
 907         }
 908
 909 #ifdef SUPPORT_LINKS
 910         if (linkname_len) {
 911                 bp += basename_len;
 912                 if (first_hlink_ndx >= flist->ndx_start) {
 913                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 914                         memcpy(bp, F_SYMLINK(first), linkname_len);
 915                 } else if (munge_symlinks) {
 916                         strlcpy(bp, SYMLINK_PREFIX, linkname_len);
 917                         bp += SYMLINK_PREFIX_LEN;
 918                         linkname_len -= SYMLINK_PREFIX_LEN;
 919                         read_sbuf(f, bp, linkname_len - 1);
 920                 } else {
 921                         read_sbuf(f, bp, linkname_len - 1);
 922                         if (sanitize_paths)
 923                                 sanitize_path(bp, bp, "", lastdir_depth, SP_DEFAULT);
 924                 }
 925         }
 926 #endif
 927
 928 #ifdef SUPPORT_HARD_LINKS
 929         if (preserve_hard_links && xflags & XMIT_HLINKED) {
 930                 if (protocol_version >= 30) {
 931                         if (xflags & XMIT_HLINK_FIRST) {
 932                                 F_HL_GNUM(file) = flist->ndx_start + flist->used;
 933                         } else
 934                                 F_HL_GNUM(file) = first_hlink_ndx;
 935                 } else {
 936                         static int32 cnt = 0;
 937                         struct ht_int64_node *np;
 938                         int64 ino;
 939                         int32 ndx;
 940                         if (protocol_version < 26) {
 941                                 dev = read_int(f);
 942                                 ino = read_int(f);
 943                         } else {
 944                                 if (!(xflags & XMIT_SAME_DEV_pre30))
 945                                         dev = read_longint(f);
 946                                 ino = read_longint(f);
 947                         }
 948                         np = idev_find(dev, ino);
 949                         ndx = (int32)(long)np->data - 1;
 950                         if (ndx < 0) {
 951                                 ndx = cnt++;
 952                                 np->data = (void*)(long)cnt;
 953                         }
 954                         F_HL_GNUM(file) = ndx;
 955                 }
 956         }
 957 #endif
 958
 959         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 960                 if (S_ISREG(mode))
 961                         bp = F_SUM(file);
 962                 else {
 963                         /* Prior to 28, we get a useless set of nulls. */
 964                         bp = tmp_sum;
 965                 }
 966                 if (first_hlink_ndx >= flist->ndx_start) {
 967                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 968                         memcpy(bp, F_SUM(first), checksum_len);
 969                 } else
 970                         read_buf(f, bp, checksum_len);
 971         }
 972
 973 #ifdef SUPPORT_ACLS
 974         if (preserve_acls && !S_ISLNK(mode))
 975                 receive_acl(file, f);
 976 #endif
 977 #ifdef SUPPORT_XATTRS
 978         if (preserve_xattrs)
 979                 receive_xattr(file, f );
 980 #endif
 981
 982         if (S_ISREG(mode) || S_ISLNK(mode))
 983                 stats.total_size += file_length;
 984
 985         return file;
 986 }
 987
 988 /* Create a file_struct for a named file by reading its stat() information
 989  * and performing extensive checks against global options.
 990  *
 991  * Returns a pointer to the new file struct, or NULL if there was an error
 992  * or this file should be excluded. */
 993 struct file_struct *make_file(const char *fname, struct file_list *flist,
 994                               STRUCT_STAT *stp, int flags, int filter_level)
 995 {
 996         static char *lastdir;
 997         static int lastdir_len = -1;
 998         struct file_struct *file;
 999         char thisname[MAXPATHLEN];
1000         char linkname[MAXPATHLEN];
1001         int alloc_len, basename_len, linkname_len;
1002         int extra_len = file_extra_cnt * EXTRA_LEN;
1003         const char *basename;
1004         alloc_pool_t *pool;
1005         STRUCT_STAT st;
1006         int excl_ret;
1007         char *bp;
1008
1009         if (strlcpy(thisname, fname, sizeof thisname) >= sizeof thisname) {
1010                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
1011                 return NULL;
1012         }
1013         clean_fname(thisname, 0);
1014         if (sanitize_paths)
1015                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
1016
1017         if (stp && S_ISDIR(stp->st_mode)) {
1018                 st = *stp; /* Needed for "symlink/." with --relative. */
1019                 *linkname = '\0'; /* make IBM code checker happy */
1020         } else if (readlink_stat(thisname, &st, linkname) != 0) {
1021                 int save_errno = errno;
1022                 /* See if file is excluded before reporting an error. */
1023                 if (filter_level != NO_FILTERS
1024                  && (is_excluded(thisname, 0, filter_level)
1025                   || is_excluded(thisname, 1, filter_level))) {
1026                         if (ignore_perishable && save_errno != ENOENT)
1027                                 non_perishable_cnt++;
1028                         return NULL;
1029                 }
1030                 if (save_errno == ENOENT) {
1031 #ifdef SUPPORT_LINKS
1032                         /* When our options tell us to follow a symlink that
1033                          * points nowhere, tell the user about the symlink
1034                          * instead of giving a "vanished" message.  We only
1035                          * dereference a symlink if one of the --copy*links
1036                          * options was specified, so there's no need for the
1037                          * extra lstat() if one of these options isn't on. */
1038                         if ((copy_links || copy_unsafe_links || copy_dirlinks)
1039                          && x_lstat(thisname, &st, NULL) == 0
1040                          && S_ISLNK(st.st_mode)) {
1041                                 io_error |= IOERR_GENERAL;
1042                                 rprintf(FERROR_XFER, "symlink has no referent: %s\n",
1043                                         full_fname(thisname));
1044                         } else
1045 #endif
1046                         {
1047                                 enum logcode c = am_daemon && protocol_version < 28
1048                                                ? FERROR : FWARNING;
1049                                 io_error |= IOERR_VANISHED;
1050                                 rprintf(c, "file has vanished: %s\n",
1051                                         full_fname(thisname));
1052                         }
1053                 } else {
1054                         io_error |= IOERR_GENERAL;
1055                         rsyserr(FERROR_XFER, save_errno, "readlink %s failed",
1056                                 full_fname(thisname));
1057                 }
1058                 return NULL;
1059         }
1060
1061         /* backup.c calls us with filter_level set to NO_FILTERS. */
1062         if (filter_level == NO_FILTERS)
1063                 goto skip_filters;
1064
1065         if (S_ISDIR(st.st_mode)) {
1066                 if (!xfer_dirs) {
1067                         rprintf(FINFO, "skipping directory %s\n", thisname);
1068                         return NULL;
1069                 }
1070                 /* -x only affects dirs because we need to avoid recursing
1071                  * into a mount-point directory, not to avoid copying a
1072                  * symlinked file if -L (or similar) was specified. */
1073                 if (one_file_system && st.st_dev != filesystem_dev
1074                  && BITS_SETnUNSET(flags, FLAG_CONTENT_DIR, FLAG_TOP_DIR)) {
1075                         if (one_file_system > 1) {
1076                                 if (verbose > 1) {
1077                                         rprintf(FINFO,
1078                                             "[%s] skipping mount-point dir %s\n",
1079                                             who_am_i(), thisname);
1080                                 }
1081                                 return NULL;
1082                         }
1083                         flags |= FLAG_MOUNT_DIR;
1084                         flags &= ~FLAG_CONTENT_DIR;
1085                 }
1086         } else
1087                 flags &= ~FLAG_CONTENT_DIR;
1088
1089         if (S_ISDIR(st.st_mode)) {
1090                 if (flags & FLAG_DOTDIR_NAME) {
1091                         /* A "." fname (or "/." fname in relative mode) is
1092                          * never excluded.  No other trailing-dotdir names
1093                          * are possible. */
1094                         excl_ret = 0;
1095                 } else
1096                         excl_ret = is_excluded(thisname, 1, filter_level);
1097         } else
1098                 excl_ret = is_excluded(thisname, 0, filter_level);
1099         if (excl_ret) {
1100                 if (ignore_perishable)
1101                         non_perishable_cnt++;
1102                 return NULL;
1103         }
1104
1105         if (lp_ignore_nonreadable(module_id)) {
1106 #ifdef SUPPORT_LINKS
1107                 if (!S_ISLNK(st.st_mode))
1108 #endif
1109                         if (access(thisname, R_OK) != 0)
1110                                 return NULL;
1111         }
1112
1113   skip_filters:
1114
1115         /* Only divert a directory in the main transfer. */
1116         if (flist) {
1117                 if (flist->prev && S_ISDIR(st.st_mode)
1118                  && flags & FLAG_DIVERT_DIRS) {
1119                         /* Room for parent/sibling/next-child info. */
1120                         extra_len += DIRNODE_EXTRA_CNT * EXTRA_LEN;
1121                         if (relative_paths)
1122                                 extra_len += PTR_EXTRA_CNT * EXTRA_LEN;
1123                         pool = dir_flist->file_pool;
1124                 } else
1125                         pool = flist->file_pool;
1126         } else {
1127 #ifdef SUPPORT_ACLS
1128                 /* Directories need an extra int32 for the default ACL. */
1129                 if (preserve_acls && S_ISDIR(st.st_mode))
1130                         extra_len += EXTRA_LEN;
1131 #endif
1132                 pool = NULL;
1133         }
1134
1135         if (verbose > 2) {
1136                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
1137                         who_am_i(), thisname, filter_level);
1138         }
1139
1140         if ((basename = strrchr(thisname, '/')) != NULL) {
1141                 int len = basename++ - thisname;
1142                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
1143                         lastdir = new_array(char, len + 1);
1144                         memcpy(lastdir, thisname, len);
1145                         lastdir[len] = '\0';
1146                         lastdir_len = len;
1147                 }
1148         } else
1149                 basename = thisname;
1150         basename_len = strlen(basename) + 1; /* count the '\0' */
1151
1152 #ifdef SUPPORT_LINKS
1153         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
1154 #else
1155         linkname_len = 0;
1156 #endif
1157
1158         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
1159                 extra_len += EXTRA_LEN;
1160
1161 #if EXTRA_ROUNDING > 0
1162         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
1163                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
1164 #endif
1165
1166         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
1167                   + linkname_len;
1168         if (pool)
1169                 bp = pool_alloc(pool, alloc_len, "make_file");
1170         else {
1171                 if (!(bp = new_array(char, alloc_len)))
1172                         out_of_memory("make_file");
1173         }
1174
1175         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
1176         bp += extra_len;
1177         file = (struct file_struct *)bp;
1178         bp += FILE_STRUCT_LEN;
1179
1180         memcpy(bp, basename, basename_len);
1181
1182 #ifdef SUPPORT_HARD_LINKS
1183         if (preserve_hard_links && flist && flist->prev) {
1184                 if (protocol_version >= 28
1185                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
1186                  : S_ISREG(st.st_mode)) {
1187                         tmp_dev = st.st_dev;
1188                         tmp_ino = st.st_ino;
1189                 } else
1190                         tmp_dev = 0;
1191         }
1192 #endif
1193
1194 #ifdef HAVE_STRUCT_STAT_ST_RDEV
1195         if (IS_DEVICE(st.st_mode) || IS_SPECIAL(st.st_mode)) {
1196                 tmp_rdev = st.st_rdev;
1197                 st.st_size = 0;
1198         }
1199 #endif
1200
1201         file->flags = flags;
1202         file->modtime = st.st_mtime;
1203         file->len32 = (uint32)st.st_size;
1204         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
1205                 file->flags |= FLAG_LENGTH64;
1206                 OPT_EXTRA(file, 0)->unum = (uint32)(st.st_size >> 32);
1207         }
1208         file->mode = st.st_mode;
1209         if (uid_ndx) /* Check uid_ndx instead of preserve_uid for del support */
1210                 F_OWNER(file) = st.st_uid;
1211         if (gid_ndx) /* Check gid_ndx instead of preserve_gid for del support */
1212                 F_GROUP(file) = st.st_gid;
1213
1214         if (basename != thisname)
1215                 file->dirname = lastdir;
1216
1217 #ifdef SUPPORT_LINKS
1218         if (linkname_len)
1219                 memcpy(bp + basename_len, linkname, linkname_len);
1220 #endif
1221
1222         if (always_checksum && am_sender && S_ISREG(st.st_mode))
1223                 file_checksum(thisname, tmp_sum, st.st_size);
1224
1225         if (am_sender)
1226                 F_PATHNAME(file) = pathname;
1227         else if (!pool)
1228                 F_DEPTH(file) = extra_len / EXTRA_LEN;
1229
1230         /* This code is only used by the receiver when it is building
1231          * a list of files for a delete pass. */
1232         if (keep_dirlinks && linkname_len && flist) {
1233                 STRUCT_STAT st2;
1234                 int save_mode = file->mode;
1235                 file->mode = S_IFDIR; /* Find a directory with our name. */
1236                 if (flist_find(dir_flist, file) >= 0
1237                  && x_stat(thisname, &st2, NULL) == 0 && S_ISDIR(st2.st_mode)) {
1238                         file->modtime = st2.st_mtime;
1239                         file->len32 = 0;
1240                         file->mode = st2.st_mode;
1241                         if (uid_ndx)
1242                                 F_OWNER(file) = st2.st_uid;
1243                         if (gid_ndx)
1244                                 F_GROUP(file) = st2.st_gid;
1245                 } else
1246                         file->mode = save_mode;
1247         }
1248
1249         if (basename_len == 0+1) {
1250                 if (!pool)
1251                         unmake_file(file);
1252                 return NULL;
1253         }
1254
1255         if (unsort_ndx)
1256                 F_NDX(file) = dir_count;
1257
1258         return file;
1259 }
1260
1261 /* Only called for temporary file_struct entries created by make_file(). */
1262 void unmake_file(struct file_struct *file)
1263 {
1264         free(REQ_EXTRA(file, F_DEPTH(file)));
1265 }
1266
1267 static struct file_struct *send_file_name(int f, struct file_list *flist,
1268                                           const char *fname, STRUCT_STAT *stp,
1269                                           int flags, int filter_level)
1270 {
1271         struct file_struct *file;
1272
1273         file = make_file(fname, flist, stp, flags, filter_level);
1274         if (!file)
1275                 return NULL;
1276
1277         if (chmod_modes && !S_ISLNK(file->mode))
1278                 file->mode = tweak_mode(file->mode, chmod_modes);
1279
1280         if (f >= 0) {
1281                 char fbuf[MAXPATHLEN];
1282 #if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
1283                 stat_x sx;
1284 #endif
1285
1286 #ifdef ICONV_OPTION
1287                 if (ic_send != (iconv_t)-1) {
1288                         xbuf outbuf, inbuf;
1289
1290                         INIT_CONST_XBUF(outbuf, fbuf);
1291
1292                         if (file->dirname) {
1293                                 INIT_XBUF_STRLEN(inbuf, (char*)file->dirname);
1294                                 outbuf.size -= 2; /* Reserve room for '/' & 1 more char. */
1295                                 if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0)
1296                                         goto convert_error;
1297                                 outbuf.size += 2;
1298                                 outbuf.buf[outbuf.len++] = '/';
1299                         }
1300
1301                         INIT_XBUF_STRLEN(inbuf, (char*)file->basename);
1302                         if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0) {
1303                           convert_error:
1304                                 io_error |= IOERR_GENERAL;
1305                                 rprintf(FINFO,
1306                                     "[%s] cannot convert filename: %s (%s)\n",
1307                                     who_am_i(), f_name(file, fbuf), strerror(errno));
1308                                 return NULL;
1309                         }
1310                         outbuf.buf[outbuf.len] = '\0';
1311                 } else
1312 #endif
1313                         f_name(file, fbuf);
1314
1315 #ifdef SUPPORT_ACLS
1316                 if (preserve_acls && !S_ISLNK(file->mode)) {
1317                         sx.st.st_mode = file->mode;
1318                         sx.acc_acl = sx.def_acl = NULL;
1319                         if (get_acl(fname, &sx) < 0)
1320                                 return NULL;
1321                 }
1322 #endif
1323 #ifdef SUPPORT_XATTRS
1324                 if (preserve_xattrs) {
1325                         sx.xattr = NULL;
1326                         if (get_xattr(fname, &sx) < 0)
1327                                 return NULL;
1328                 }
1329 #endif
1330
1331                 send_file_entry(f, fbuf, file, flist->used, flist->ndx_start);
1332
1333 #ifdef SUPPORT_ACLS
1334                 if (preserve_acls && !S_ISLNK(file->mode)) {
1335                         send_acl(&sx, f);
1336                         free_acl(&sx);
1337                 }
1338 #endif
1339 #ifdef SUPPORT_XATTRS
1340                 if (preserve_xattrs) {
1341                         F_XATTR(file) = send_xattr(&sx, f);
1342                         free_xattr(&sx);
1343                 }
1344 #endif
1345         }
1346
1347         maybe_emit_filelist_progress(flist->used + flist_count_offset);
1348
1349         flist_expand(flist, 1);
1350         flist->files[flist->used++] = file;
1351
1352         return file;
1353 }
1354
1355 static void send_if_directory(int f, struct file_list *flist,
1356                               struct file_struct *file,
1357                               char *fbuf, unsigned int ol,
1358                               int flags)
1359 {
1360         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1361
1362         if (S_ISDIR(file->mode)
1363             && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) {
1364                 void *save_filters;
1365                 unsigned int len = strlen(fbuf);
1366                 if (len > 1 && fbuf[len-1] == '/')
1367                         fbuf[--len] = '\0';
1368                 if (len >= MAXPATHLEN - 1) {
1369                         io_error |= IOERR_GENERAL;
1370                         rprintf(FERROR_XFER, "skipping long-named directory: %s\n",
1371                                 full_fname(fbuf));
1372                         return;
1373                 }
1374                 save_filters = push_local_filters(fbuf, len);
1375                 send_directory(f, flist, fbuf, len, flags);
1376                 pop_local_filters(save_filters);
1377                 fbuf[ol] = '\0';
1378                 if (is_dot_dir)
1379                         fbuf[ol-1] = '.';
1380         }
1381 }
1382
1383 static int file_compare(const void *file1, const void *file2)
1384 {
1385         return f_name_cmp(*(struct file_struct **)file1,
1386                           *(struct file_struct **)file2);
1387 }
1388
1389 /* The guts of a merge-sort algorithm.  This was derived from the glibc
1390  * version, but I (Wayne) changed the merge code to do less copying and
1391  * to require only half the amount of temporary memory. */
1392 static void fsort_tmp(struct file_struct **fp, size_t num,
1393                       struct file_struct **tmp)
1394 {
1395         struct file_struct **f1, **f2, **t;
1396         size_t n1, n2;
1397
1398         n1 = num / 2;
1399         n2 = num - n1;
1400         f1 = fp;
1401         f2 = fp + n1;
1402
1403         if (n1 > 1)
1404                 fsort_tmp(f1, n1, tmp);
1405         if (n2 > 1)
1406                 fsort_tmp(f2, n2, tmp);
1407
1408         while (f_name_cmp(*f1, *f2) <= 0) {
1409                 if (!--n1)
1410                         return;
1411                 f1++;
1412         }
1413
1414         t = tmp;
1415         memcpy(t, f1, n1 * PTR_SIZE);
1416
1417         *f1++ = *f2++, n2--;
1418
1419         while (n1 > 0 && n2 > 0) {
1420                 if (f_name_cmp(*t, *f2) <= 0)
1421                         *f1++ = *t++, n1--;
1422                 else
1423                         *f1++ = *f2++, n2--;
1424         }
1425
1426         if (n1 > 0)
1427                 memcpy(f1, t, n1 * PTR_SIZE);
1428 }
1429
1430 /* This file-struct sorting routine makes sure that any identical names in
1431  * the file list stay in the same order as they were in the original list.
1432  * This is particularly vital in inc_recurse mode where we expect a sort
1433  * on the flist to match the exact order of a sort on the dir_flist. */
1434 static void fsort(struct file_struct **fp, size_t num)
1435 {
1436         if (num <= 1)
1437                 return;
1438
1439         if (use_qsort)
1440                 qsort(fp, num, PTR_SIZE, file_compare);
1441         else {
1442                 struct file_struct **tmp = new_array(struct file_struct *,
1443                                                      (num+1) / 2);
1444                 fsort_tmp(fp, num, tmp);
1445                 free(tmp);
1446         }
1447 }
1448
1449 /* We take an entire set of sibling dirs from the sorted flist and link them
1450  * into the tree, setting the appropriate parent/child/sibling pointers. */
1451 static void add_dirs_to_tree(int parent_ndx, struct file_list *from_flist,
1452                              int dir_cnt)
1453 {
1454         int i;
1455         int32 *dp = NULL;
1456         int32 *parent_dp = parent_ndx < 0 ? NULL
1457                          : F_DIR_NODE_P(dir_flist->sorted[parent_ndx]);
1458
1459         flist_expand(dir_flist, dir_cnt);
1460         dir_flist->sorted = dir_flist->files;
1461
1462         for (i = 0; dir_cnt; i++) {
1463                 struct file_struct *file = from_flist->sorted[i];
1464
1465                 if (!S_ISDIR(file->mode))
1466                         continue;
1467
1468                 dir_flist->files[dir_flist->used++] = file;
1469                 dir_cnt--;
1470
1471                 if (file->basename[0] == '.' && file->basename[1] == '\0')
1472                         continue;
1473
1474                 if (dp)
1475                         DIR_NEXT_SIBLING(dp) = dir_flist->used - 1;
1476                 else if (parent_dp)
1477                         DIR_FIRST_CHILD(parent_dp) = dir_flist->used - 1;
1478                 else
1479                         send_dir_ndx = dir_flist->used - 1;
1480
1481                 dp = F_DIR_NODE_P(file);
1482                 DIR_PARENT(dp) = parent_ndx;
1483                 DIR_FIRST_CHILD(dp) = -1;
1484         }
1485         if (dp)
1486                 DIR_NEXT_SIBLING(dp) = -1;
1487 }
1488
1489 /* This function is normally called by the sender, but the receiving side also
1490  * calls it from get_dirlist() with f set to -1 so that we just construct the
1491  * file list in memory without sending it over the wire.  Also, get_dirlist()
1492  * might call this with f set to -2, which also indicates that local filter
1493  * rules should be ignored. */
1494 static void send_directory(int f, struct file_list *flist, char *fbuf, int len,
1495                            int flags)
1496 {
1497         struct dirent *di;
1498         unsigned remainder;
1499         char *p;
1500         DIR *d;
1501         int divert_dirs = (flags & FLAG_DIVERT_DIRS) != 0;
1502         int start = flist->used;
1503         int filter_level = f == -2 ? SERVER_FILTERS : ALL_FILTERS;
1504
1505         assert(flist != NULL);
1506
1507         if (!(d = opendir(fbuf))) {
1508                 io_error |= IOERR_GENERAL;
1509                 rsyserr(FERROR_XFER, errno, "opendir %s failed", full_fname(fbuf));
1510                 return;
1511         }
1512
1513         p = fbuf + len;
1514         if (len != 1 || *fbuf != '/')
1515                 *p++ = '/';
1516         *p = '\0';
1517         remainder = MAXPATHLEN - (p - fbuf);
1518
1519         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1520                 char *dname = d_name(di);
1521                 if (dname[0] == '.' && (dname[1] == '\0'
1522                     || (dname[1] == '.' && dname[2] == '\0')))
1523                         continue;
1524                 if (strlcpy(p, dname, remainder) >= remainder) {
1525                         io_error |= IOERR_GENERAL;
1526                         rprintf(FINFO,
1527                                 "cannot send long-named file %s\n",
1528                                 full_fname(fbuf));
1529                         continue;
1530                 }
1531                 if (dname[0] == '\0') {
1532                         io_error |= IOERR_GENERAL;
1533                         rprintf(FINFO,
1534                                 "cannot send file with empty name in %s\n",
1535                                 full_fname(fbuf));
1536                         continue;
1537                 }
1538
1539                 send_file_name(f, flist, fbuf, NULL, flags, filter_level);
1540         }
1541
1542         fbuf[len] = '\0';
1543
1544         if (errno) {
1545                 io_error |= IOERR_GENERAL;
1546                 rsyserr(FERROR_XFER, errno, "readdir(%s)", full_fname(fbuf));
1547         }
1548
1549         closedir(d);
1550
1551         if (f >= 0 && recurse && !divert_dirs) {
1552                 int i, end = flist->used - 1;
1553                 /* send_if_directory() bumps flist->used, so use "end". */
1554                 for (i = start; i <= end; i++)
1555                         send_if_directory(f, flist, flist->files[i], fbuf, len, flags);
1556         }
1557 }
1558
1559 static void send_implied_dirs(int f, struct file_list *flist, char *fname,
1560                               char *start, char *limit, int flags, char name_type)
1561 {
1562         static char lastpath[MAXPATHLEN] = "";
1563         static int lastpath_len = 0;
1564         static struct file_struct *lastpath_struct = NULL;
1565         struct file_struct *file;
1566         item_list *relname_list;
1567         relnamecache **rnpp;
1568         int len, need_new_dir, depth = 0;
1569         struct filter_list_struct save_filter_list = filter_list;
1570
1571         flags = (flags | FLAG_IMPLIED_DIR) & ~(FLAG_TOP_DIR | FLAG_CONTENT_DIR);
1572         filter_list.head = filter_list.tail = NULL; /* Don't filter implied dirs. */
1573
1574         if (inc_recurse) {
1575                 if (lastpath_struct && F_PATHNAME(lastpath_struct) == pathname
1576                  && lastpath_len == limit - fname
1577                  && strncmp(lastpath, fname, lastpath_len) == 0)
1578                         need_new_dir = 0;
1579                 else
1580                         need_new_dir = 1;
1581         } else {
1582                 char *tp = fname, *lp = lastpath;
1583                 /* Skip any initial directories in our path that we
1584                  * have in common with lastpath. */
1585                 assert(start == fname);
1586                 for ( ; ; tp++, lp++) {
1587                         if (tp == limit) {
1588                                 if (*lp == '/' || *lp == '\0')
1589                                         goto done;
1590                                 break;
1591                         }
1592                         if (*lp != *tp)
1593                                 break;
1594                         if (*tp == '/') {
1595                                 start = tp;
1596                                 depth++;
1597                         }
1598                 }
1599                 need_new_dir = 1;
1600         }
1601
1602         if (need_new_dir) {
1603                 int save_copy_links = copy_links;
1604                 int save_xfer_dirs = xfer_dirs;
1605                 char *slash;
1606
1607                 copy_links = xfer_dirs = 1;
1608
1609                 *limit = '\0';
1610
1611                 for (slash = start; (slash = strchr(slash+1, '/')) != NULL; ) {
1612                         *slash = '\0';
1613                         file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1614                         depth++;
1615                         if (!inc_recurse && file && S_ISDIR(file->mode))
1616                                 change_local_filter_dir(fname, strlen(fname), depth);
1617                         *slash = '/';
1618                 }
1619
1620                 file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1621                 if (inc_recurse) {
1622                         if (file && !S_ISDIR(file->mode))
1623                                 file = NULL;
1624                         lastpath_struct = file;
1625                 } else if (file && S_ISDIR(file->mode))
1626                         change_local_filter_dir(fname, strlen(fname), ++depth);
1627
1628                 strlcpy(lastpath, fname, sizeof lastpath);
1629                 lastpath_len = limit - fname;
1630
1631                 *limit = '/';
1632
1633                 copy_links = save_copy_links;
1634                 xfer_dirs = save_xfer_dirs;
1635
1636                 if (!inc_recurse)
1637                         goto done;
1638         }
1639
1640         if (!lastpath_struct)
1641                 goto done; /* dir must have vanished */
1642
1643         len = strlen(limit+1);
1644         memcpy(&relname_list, F_DIR_RELNAMES_P(lastpath_struct), sizeof relname_list);
1645         if (!relname_list) {
1646                 if (!(relname_list = new0(item_list)))
1647                         out_of_memory("send_implied_dirs");
1648                 memcpy(F_DIR_RELNAMES_P(lastpath_struct), &relname_list, sizeof relname_list);
1649         }
1650         rnpp = EXPAND_ITEM_LIST(relname_list, relnamecache *, 32);
1651         if (!(*rnpp = (relnamecache*)new_array(char, sizeof (relnamecache) + len)))
1652                 out_of_memory("send_implied_dirs");
1653         (*rnpp)->name_type = name_type;
1654         strlcpy((*rnpp)->fname, limit+1, len + 1);
1655
1656 done:
1657         filter_list = save_filter_list;
1658 }
1659
1660 static void send1extra(int f, struct file_struct *file, struct file_list *flist)
1661 {
1662         char fbuf[MAXPATHLEN];
1663         item_list *relname_list;
1664         int len, dlen, flags = FLAG_DIVERT_DIRS | FLAG_CONTENT_DIR;
1665         size_t j;
1666
1667         f_name(file, fbuf);
1668         dlen = strlen(fbuf);
1669
1670         if (F_PATHNAME(file) != pathname) {
1671                 if (!push_pathname(F_PATHNAME(file), -1))
1672                         exit_cleanup(RERR_FILESELECT);
1673         }
1674
1675         change_local_filter_dir(fbuf, dlen, send_dir_depth);
1676
1677         if (file->flags & FLAG_CONTENT_DIR) {
1678                 if (one_file_system) {
1679                         STRUCT_STAT st;
1680                         if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1681                                 io_error |= IOERR_GENERAL;
1682                                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1683                                         full_fname(fbuf));
1684                                 return;
1685                         }
1686                         filesystem_dev = st.st_dev;
1687                 }
1688                 send_directory(f, flist, fbuf, dlen, flags);
1689         }
1690
1691         if (!relative_paths)
1692                 return;
1693
1694         memcpy(&relname_list, F_DIR_RELNAMES_P(file), sizeof relname_list);
1695         if (!relname_list)
1696                 return;
1697
1698         for (j = 0; j < relname_list->count; j++) {
1699                 char *slash;
1700                 relnamecache *rnp = ((relnamecache**)relname_list->items)[j];
1701                 char name_type = rnp->name_type;
1702
1703                 fbuf[dlen] = '/';
1704                 len = strlcpy(fbuf + dlen + 1, rnp->fname, sizeof fbuf - dlen - 1);
1705                 free(rnp);
1706                 if (len >= (int)sizeof fbuf)
1707                         continue; /* Impossible... */
1708
1709                 slash = strchr(fbuf+dlen+1, '/');
1710                 if (slash) {
1711                         send_implied_dirs(f, flist, fbuf, fbuf+dlen+1, slash, flags, name_type);
1712                         continue;
1713                 }
1714
1715                 if (name_type != NORMAL_NAME) {
1716                         STRUCT_STAT st;
1717                         if (link_stat(fbuf, &st, 1) != 0) {
1718                                 io_error |= IOERR_GENERAL;
1719                                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1720                                         full_fname(fbuf));
1721                                 continue;
1722                         }
1723                         send_file_name(f, flist, fbuf, &st, FLAG_TOP_DIR | flags, ALL_FILTERS);
1724                 } else
1725                         send_file_name(f, flist, fbuf, NULL, FLAG_TOP_DIR | flags, ALL_FILTERS);
1726         }
1727
1728         free(relname_list);
1729 }
1730
1731 void send_extra_file_list(int f, int at_least)
1732 {
1733         struct file_list *flist;
1734         int64 start_write;
1735         uint16 prev_flags;
1736         int old_cnt, save_io_error = io_error;
1737
1738         if (flist_eof)
1739                 return;
1740
1741         /* Keep sending data until we have the requested number of
1742          * files in the upcoming file-lists. */
1743         old_cnt = cur_flist->used;
1744         for (flist = first_flist; flist != cur_flist; flist = flist->next)
1745                 old_cnt += flist->used;
1746         while (file_total - old_cnt < at_least) {
1747                 struct file_struct *file = dir_flist->sorted[send_dir_ndx];
1748                 int dir_ndx, dstart = dir_count;
1749                 const char *pathname = F_PATHNAME(file);
1750                 int32 *dp;
1751
1752                 flist = flist_new(0, "send_extra_file_list");
1753                 start_write = stats.total_written;
1754
1755                 if (unsort_ndx)
1756                         dir_ndx = F_NDX(file);
1757                 else
1758                         dir_ndx = send_dir_ndx;
1759                 write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
1760                 flist->parent_ndx = dir_ndx;
1761
1762                 send1extra(f, file, flist);
1763                 prev_flags = file->flags;
1764                 dp = F_DIR_NODE_P(file);
1765
1766                 /* If there are any duplicate directory names that follow, we
1767                  * send all the dirs together in one file-list.  The dir_flist
1768                  * tree links all the child subdirs onto the last dup dir. */
1769                 while ((dir_ndx = DIR_NEXT_SIBLING(dp)) >= 0
1770                     && dir_flist->sorted[dir_ndx]->flags & FLAG_DUPLICATE) {
1771                         send_dir_ndx = dir_ndx;
1772                         file = dir_flist->sorted[dir_ndx];
1773                         /* Try to avoid some duplicate scanning of identical dirs. */
1774                         if (F_PATHNAME(file) == pathname && prev_flags & FLAG_CONTENT_DIR)
1775                                 file->flags &= ~FLAG_CONTENT_DIR;
1776                         send1extra(f, file, flist);
1777                         prev_flags = file->flags;
1778                         dp = F_DIR_NODE_P(file);
1779                 }
1780
1781                 write_byte(f, 0);
1782
1783                 if (need_unsorted_flist) {
1784                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
1785                                 out_of_memory("send_extra_file_list");
1786                         memcpy(flist->sorted, flist->files,
1787                                flist->used * sizeof (struct file_struct*));
1788                 } else
1789                         flist->sorted = flist->files;
1790
1791                 flist_sort_and_clean(flist, 0);
1792
1793                 add_dirs_to_tree(send_dir_ndx, flist, dir_count - dstart);
1794                 flist_done_allocating(flist);
1795
1796                 file_total += flist->used;
1797                 stats.flist_size += stats.total_written - start_write;
1798                 stats.num_files += flist->used;
1799                 if (verbose > 3)
1800                         output_flist(flist);
1801
1802                 if (DIR_FIRST_CHILD(dp) >= 0) {
1803                         send_dir_ndx = DIR_FIRST_CHILD(dp);
1804                         send_dir_depth++;
1805                 } else {
1806                         while (DIR_NEXT_SIBLING(dp) < 0) {
1807                                 if ((send_dir_ndx = DIR_PARENT(dp)) < 0) {
1808                                         write_ndx(f, NDX_FLIST_EOF);
1809                                         flist_eof = 1;
1810                                         change_local_filter_dir(NULL, 0, 0);
1811                                         goto finish;
1812                                 }
1813                                 send_dir_depth--;
1814                                 file = dir_flist->sorted[send_dir_ndx];
1815                                 dp = F_DIR_NODE_P(file);
1816                         }
1817                         send_dir_ndx = DIR_NEXT_SIBLING(dp);
1818                 }
1819         }
1820
1821   finish:
1822         if (io_error != save_io_error && !ignore_errors)
1823                 send_msg_int(MSG_IO_ERROR, io_error);
1824 }
1825
1826 struct file_list *send_file_list(int f, int argc, char *argv[])
1827 {
1828         static const char *lastdir;
1829         static int lastdir_len = -1;
1830         int len, dirlen;
1831         STRUCT_STAT st;
1832         char *p, *dir;
1833         struct file_list *flist;
1834         struct timeval start_tv, end_tv;
1835         int64 start_write;
1836         int use_ff_fd = 0;
1837         int disable_buffering;
1838         int arg_flags, flags = recurse ? FLAG_CONTENT_DIR : 0;
1839         int reading_remotely = filesfrom_host != NULL;
1840         int rl_flags = (reading_remotely ? 0 : RL_DUMP_COMMENTS)
1841 #ifdef ICONV_OPTION
1842                      | (filesfrom_convert ? RL_CONVERT : 0)
1843 #endif
1844                      | (eol_nulls || reading_remotely ? RL_EOL_NULLS : 0);
1845         int implied_dot_dir = 0;
1846
1847         rprintf(FLOG, "building file list\n");
1848         if (show_filelist_p())
1849                 start_filelist_progress("building file list");
1850         else if (inc_recurse && verbose && !am_server)
1851                 rprintf(FCLIENT, "sending incremental file list\n");
1852
1853         start_write = stats.total_written;
1854         gettimeofday(&start_tv, NULL);
1855
1856         if (relative_paths && protocol_version >= 30)
1857                 implied_dirs = 1; /* We send flagged implied dirs */
1858
1859 #ifdef SUPPORT_HARD_LINKS
1860         if (preserve_hard_links && protocol_version >= 30 && !cur_flist)
1861                 init_hard_links();
1862 #endif
1863
1864         flist = cur_flist = flist_new(0, "send_file_list");
1865         if (inc_recurse) {
1866                 dir_flist = flist_new(FLIST_TEMP, "send_file_list");
1867                 flags |= FLAG_DIVERT_DIRS;
1868         } else
1869                 dir_flist = cur_flist;
1870
1871         disable_buffering = io_start_buffering_out(f);
1872         if (filesfrom_fd >= 0) {
1873                 if (argv[0] && !push_dir(argv[0], 0)) {
1874                         rsyserr(FERROR_XFER, errno, "push_dir %s failed in %s",
1875                                 full_fname(argv[0]), curr_dir);
1876                         exit_cleanup(RERR_FILESELECT);
1877                 }
1878                 use_ff_fd = 1;
1879         }
1880
1881         while (1) {
1882                 char fbuf[MAXPATHLEN], *fn, name_type;
1883
1884                 if (use_ff_fd) {
1885                         if (read_line(filesfrom_fd, fbuf, sizeof fbuf, rl_flags) == 0)
1886                                 break;
1887                         sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
1888                 } else {
1889                         if (argc-- == 0)
1890                                 break;
1891                         strlcpy(fbuf, *argv++, MAXPATHLEN);
1892                         if (sanitize_paths)
1893                                 sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
1894                 }
1895
1896                 len = strlen(fbuf);
1897                 if (relative_paths) {
1898                         /* We clean up fbuf below. */
1899                         name_type = NORMAL_NAME;
1900                 } else if (!len || fbuf[len - 1] == '/') {
1901                         if (len == 2 && fbuf[0] == '.') {
1902                                 /* Turn "./" into just "." rather than "./." */
1903                                 fbuf[--len] = '\0';
1904                         } else {
1905                                 if (len + 1 >= MAXPATHLEN)
1906                                         overflow_exit("send_file_list");
1907                                 fbuf[len++] = '.';
1908                                 fbuf[len] = '\0';
1909                         }
1910                         name_type = DOTDIR_NAME;
1911                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
1912                     && (len == 2 || fbuf[len-3] == '/')) {
1913                         if (len + 2 >= MAXPATHLEN)
1914                                 overflow_exit("send_file_list");
1915                         fbuf[len++] = '/';
1916                         fbuf[len++] = '.';
1917                         fbuf[len] = '\0';
1918                         name_type = DOTDIR_NAME;
1919                 } else if (fbuf[len-1] == '.' && (len == 1 || fbuf[len-2] == '/'))
1920                         name_type = DOTDIR_NAME;
1921                 else
1922                         name_type = NORMAL_NAME;
1923
1924                 dir = NULL;
1925
1926                 if (!relative_paths) {
1927                         p = strrchr(fbuf, '/');
1928                         if (p) {
1929                                 *p = '\0';
1930                                 if (p == fbuf)
1931                                         dir = "/";
1932                                 else
1933                                         dir = fbuf;
1934                                 len -= p - fbuf + 1;
1935                                 fn = p + 1;
1936                         } else
1937                                 fn = fbuf;
1938                 } else {
1939                         if ((p = strstr(fbuf, "/./")) != NULL) {
1940                                 *p = '\0';
1941                                 if (p == fbuf)
1942                                         dir = "/";
1943                                 else {
1944                                         dir = fbuf;
1945                                         clean_fname(dir, 0);
1946                                 }
1947                                 fn = p + 3;
1948                                 while (*fn == '/')
1949                                         fn++;
1950                                 if (!*fn)
1951                                         *--fn = '\0'; /* ensure room for '.' */
1952                         } else
1953                                 fn = fbuf;
1954                         /* A leading ./ can be used in relative mode to affect
1955                          * the dest dir without its name being in the path. */
1956                         if (*fn == '.' && fn[1] == '/' && !implied_dot_dir) {
1957                                 send_file_name(f, flist, ".", NULL,
1958                                     (flags | FLAG_IMPLIED_DIR) & ~FLAG_CONTENT_DIR,
1959                                     ALL_FILTERS);
1960                                 implied_dot_dir = 1;
1961                         }
1962                         len = clean_fname(fn, CFN_KEEP_TRAILING_SLASH
1963                                             | CFN_DROP_TRAILING_DOT_DIR);
1964                         if (len == 1) {
1965                                 if (fn[0] == '/') {
1966                                         fn = "/.";
1967                                         len = 2;
1968                                         name_type = DOTDIR_NAME;
1969                                 } else if (fn[0] == '.')
1970                                         name_type = DOTDIR_NAME;
1971                         } else if (fn[len-1] == '/') {
1972                                 fn[--len] = '\0';
1973                                 if (len == 1 && *fn == '.')
1974                                         name_type = DOTDIR_NAME;
1975                                 else
1976                                         name_type = SLASH_ENDING_NAME;
1977                         }
1978                         /* Reject a ".." dir in the active part of the path. */
1979                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
1980                                 if ((p[2] == '/' || p[2] == '\0')
1981                                  && (p == fn || p[-1] == '/')) {
1982                                         rprintf(FERROR,
1983                                             "found \"..\" dir in relative path: %s\n",
1984                                             fn);
1985                                         exit_cleanup(RERR_SYNTAX);
1986                                 }
1987                         }
1988                 }
1989
1990                 if (!*fn) {
1991                         len = 1;
1992                         fn = ".";
1993                         name_type = DOTDIR_NAME;
1994                 }
1995
1996                 dirlen = dir ? strlen(dir) : 0;
1997                 if (dirlen != lastdir_len || memcmp(lastdir, dir, dirlen) != 0) {
1998                         if (path_is_daemon_excluded(dir, 0)) {
1999                                 io_error |= IOERR_GENERAL;
2000                                 rsyserr(FERROR, errno, "push_dir %s failed in %s",
2001                                         full_fname(dir), curr_dir);
2002                                 continue;
2003                         }
2004                         if (!push_pathname(dir ? strdup(dir) : NULL, dirlen))
2005                                 continue;
2006                         lastdir = pathname;
2007                         lastdir_len = pathname_len;
2008                 } else if (!push_pathname(lastdir, lastdir_len))
2009                         continue;
2010
2011                 if (fn != fbuf)
2012                         memmove(fbuf, fn, len + 1);
2013
2014                 if (link_stat(fbuf, &st, copy_dirlinks || name_type != NORMAL_NAME) != 0
2015                  || (name_type != DOTDIR_NAME && is_daemon_excluded(fbuf, S_ISDIR(st.st_mode)))
2016                  || (relative_paths && path_is_daemon_excluded(fbuf, 1))) {
2017                         io_error |= IOERR_GENERAL;
2018                         rsyserr(FERROR_XFER, errno, "link_stat %s failed",
2019                                 full_fname(fbuf));
2020                         continue;
2021                 }
2022
2023                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
2024                         rprintf(FINFO, "skipping directory %s\n", fbuf);
2025                         continue;
2026                 }
2027
2028                 if (inc_recurse && relative_paths && *fbuf) {
2029                         if ((p = strchr(fbuf+1, '/')) != NULL) {
2030                                 if (p - fbuf == 1 && *fbuf == '.') {
2031                                         if ((fn = strchr(p+1, '/')) != NULL)
2032                                                 p = fn;
2033                                 } else
2034                                         fn = p;
2035                                 send_implied_dirs(f, flist, fbuf, fbuf, p, flags, name_type);
2036                                 if (fn == p)
2037                                         continue;
2038                         }
2039                 } else if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
2040                         /* Send the implied directories at the start of the
2041                          * source spec, so we get their permissions right. */
2042                         send_implied_dirs(f, flist, fbuf, fbuf, p, flags, 0);
2043                 }
2044
2045                 if (one_file_system)
2046                         filesystem_dev = st.st_dev;
2047
2048                 arg_flags = name_type == DOTDIR_NAME ? FLAG_DOTDIR_NAME : 0;
2049
2050                 if (recurse || (xfer_dirs && name_type != NORMAL_NAME)) {
2051                         struct file_struct *file;
2052                         arg_flags |= FLAG_TOP_DIR | FLAG_CONTENT_DIR;
2053                         file = send_file_name(f, flist, fbuf, &st,
2054                                               arg_flags | flags, ALL_FILTERS);
2055                         if (!file)
2056                                 continue;
2057                         if (inc_recurse) {
2058                                 if (name_type == DOTDIR_NAME) {
2059                                         if (send_dir_depth < 0) {
2060                                                 send_dir_depth = 0;
2061                                                 change_local_filter_dir(fbuf, len, send_dir_depth);
2062                                         }
2063                                         send_directory(f, flist, fbuf, len, flags);
2064                                 }
2065                         } else
2066                                 send_if_directory(f, flist, file, fbuf, len, flags);
2067                 } else
2068                         send_file_name(f, flist, fbuf, &st, arg_flags | flags, ALL_FILTERS);
2069         }
2070
2071         gettimeofday(&end_tv, NULL);
2072         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2073                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2074         if (stats.flist_buildtime == 0)
2075                 stats.flist_buildtime = 1;
2076         start_tv = end_tv;
2077
2078         write_byte(f, 0); /* Indicate end of file list */
2079
2080 #ifdef SUPPORT_HARD_LINKS
2081         if (preserve_hard_links && protocol_version >= 30 && !inc_recurse)
2082                 idev_destroy();
2083 #endif
2084
2085         if (show_filelist_p())
2086                 finish_filelist_progress(flist);
2087
2088         gettimeofday(&end_tv, NULL);
2089         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2090                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2091
2092         /* When converting names, both sides keep an unsorted file-list array
2093          * because the names will differ on the sending and receiving sides
2094          * (both sides will use the unsorted index number for each item). */
2095
2096         /* Sort the list without removing any duplicates.  This allows the
2097          * receiving side to ask for whatever name it kept.  For incremental
2098          * recursion mode, the sender marks duplicate dirs so that it can
2099          * send them together in a single file-list. */
2100         if (need_unsorted_flist) {
2101                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2102                         out_of_memory("send_file_list");
2103                 memcpy(flist->sorted, flist->files,
2104                        flist->used * sizeof (struct file_struct*));
2105         } else
2106                 flist->sorted = flist->files;
2107         flist_sort_and_clean(flist, 0);
2108         file_total += flist->used;
2109
2110         if (numeric_ids <= 0 && !inc_recurse)
2111                 send_id_list(f);
2112
2113         /* send the io_error flag */
2114         if (protocol_version < 30)
2115                 write_int(f, ignore_errors ? 0 : io_error);
2116         else if (io_error && !ignore_errors)
2117                 send_msg_int(MSG_IO_ERROR, io_error);
2118
2119         if (disable_buffering)
2120                 io_end_buffering_out();
2121
2122         stats.flist_size = stats.total_written - start_write;
2123         stats.num_files = flist->used;
2124
2125         if (verbose > 3)
2126                 output_flist(flist);
2127
2128         if (verbose > 2)
2129                 rprintf(FINFO, "send_file_list done\n");
2130
2131         if (inc_recurse) {
2132                 send_dir_depth = 1;
2133                 add_dirs_to_tree(-1, flist, dir_count);
2134                 if (!file_total || strcmp(flist->sorted[0]->basename, ".") != 0)
2135                         flist->parent_ndx = -1;
2136                 flist_done_allocating(flist);
2137                 if (send_dir_ndx < 0) {
2138                         write_ndx(f, NDX_FLIST_EOF);
2139                         flist_eof = 1;
2140                 }
2141                 else if (file_total == 1) {
2142                         /* If we're creating incremental file-lists and there
2143                          * was just 1 item in the first file-list, send 1 more
2144                          * file-list to check if this is a 1-file xfer. */
2145                         send_extra_file_list(f, 1);
2146                 }
2147         }
2148
2149         return flist;
2150 }
2151
2152 struct file_list *recv_file_list(int f)
2153 {
2154         struct file_list *flist;
2155         int dstart, flags;
2156         int64 start_read;
2157
2158         if (!first_flist)
2159                 rprintf(FLOG, "receiving file list\n");
2160         if (show_filelist_p())
2161                 start_filelist_progress("receiving file list");
2162         else if (inc_recurse && verbose && !am_server && !first_flist)
2163                 rprintf(FCLIENT, "receiving incremental file list\n");
2164
2165         start_read = stats.total_read;
2166
2167 #ifdef SUPPORT_HARD_LINKS
2168         if (preserve_hard_links && !first_flist)
2169                 init_hard_links();
2170 #endif
2171
2172         flist = flist_new(0, "recv_file_list");
2173
2174         if (inc_recurse) {
2175                 if (flist->ndx_start == 1)
2176                         dir_flist = flist_new(FLIST_TEMP, "recv_file_list");
2177                 dstart = dir_flist->used;
2178         } else {
2179                 dir_flist = flist;
2180                 dstart = 0;
2181         }
2182
2183         while ((flags = read_byte(f)) != 0) {
2184                 struct file_struct *file;
2185
2186                 flist_expand(flist, 1);
2187
2188                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
2189                         flags |= read_byte(f) << 8;
2190                 file = recv_file_entry(flist, flags, f);
2191
2192                 if (inc_recurse && S_ISDIR(file->mode)) {
2193                         flist_expand(dir_flist, 1);
2194                         dir_flist->files[dir_flist->used++] = file;
2195                 }
2196
2197                 flist->files[flist->used++] = file;
2198
2199                 maybe_emit_filelist_progress(flist->used);
2200
2201                 if (verbose > 2) {
2202                         rprintf(FINFO, "recv_file_name(%s)\n",
2203                                 f_name(file, NULL));
2204                 }
2205         }
2206         file_total += flist->used;
2207
2208         if (verbose > 2)
2209                 rprintf(FINFO, "received %d names\n", flist->used);
2210
2211         if (show_filelist_p())
2212                 finish_filelist_progress(flist);
2213
2214         if (need_unsorted_flist) {
2215                 /* Create an extra array of index pointers that we can sort for
2216                  * the generator's use (for wading through the files in sorted
2217                  * order and for calling flist_find()).  We keep the "files"
2218                  * list unsorted for our exchange of index numbers with the
2219                  * other side (since their names may not sort the same). */
2220                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2221                         out_of_memory("recv_file_list");
2222                 memcpy(flist->sorted, flist->files,
2223                        flist->used * sizeof (struct file_struct*));
2224                 if (inc_recurse && dir_flist->used > dstart) {
2225                         static int dir_flist_malloced = 0;
2226                         if (dir_flist_malloced < dir_flist->malloced) {
2227                                 dir_flist->sorted = realloc_array(dir_flist->sorted,
2228                                                         struct file_struct *,
2229                                                         dir_flist->malloced);
2230                                 dir_flist_malloced = dir_flist->malloced;
2231                         }
2232                         memcpy(dir_flist->sorted + dstart, dir_flist->files + dstart,
2233                                (dir_flist->used - dstart) * sizeof (struct file_struct*));
2234                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2235                 }
2236         } else {
2237                 flist->sorted = flist->files;
2238                 if (inc_recurse && dir_flist->used > dstart) {
2239                         dir_flist->sorted = dir_flist->files;
2240                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2241                 }
2242         }
2243
2244         if (inc_recurse)
2245                 flist_done_allocating(flist);
2246         else if (f >= 0)
2247                 recv_id_list(f, flist);
2248
2249         flist_sort_and_clean(flist, relative_paths);
2250
2251         if (protocol_version < 30) {
2252                 /* Recv the io_error flag */
2253                 if (ignore_errors)
2254                         read_int(f);
2255                 else
2256                         io_error |= read_int(f);
2257         } else if (inc_recurse && flist->ndx_start == 1) {
2258                 if (!file_total || strcmp(flist->sorted[0]->basename, ".") != 0)
2259                         flist->parent_ndx = -1;
2260         }
2261
2262         if (verbose > 3)
2263                 output_flist(flist);
2264
2265         if (verbose > 2)
2266                 rprintf(FINFO, "recv_file_list done\n");
2267
2268         stats.flist_size += stats.total_read - start_read;
2269         stats.num_files += flist->used;
2270
2271         return flist;
2272 }
2273
2274 /* This is only used once by the receiver if the very first file-list
2275  * has exactly one item in it. */
2276 void recv_additional_file_list(int f)
2277 {
2278         struct file_list *flist;
2279         int ndx = read_ndx(f);
2280         if (ndx == NDX_FLIST_EOF) {
2281                 flist_eof = 1;
2282                 change_local_filter_dir(NULL, 0, 0);
2283         } else {
2284                 ndx = NDX_FLIST_OFFSET - ndx;
2285                 if (ndx < 0 || ndx >= dir_flist->used) {
2286                         ndx = NDX_FLIST_OFFSET - ndx;
2287                         rprintf(FERROR,
2288                                 "[%s] Invalid dir index: %d (%d - %d)\n",
2289                                 who_am_i(), ndx, NDX_FLIST_OFFSET,
2290                                 NDX_FLIST_OFFSET - dir_flist->used + 1);
2291                         exit_cleanup(RERR_PROTOCOL);
2292                 }
2293                 if (verbose > 3) {
2294                         rprintf(FINFO, "[%s] receiving flist for dir %d\n",
2295                                 who_am_i(), ndx);
2296                 }
2297                 flist = recv_file_list(f);
2298                 flist->parent_ndx = ndx;
2299         }
2300 }
2301
2302 /* Search for an identically-named item in the file list.  Note that the
2303  * items must agree in their directory-ness, or no match is returned. */
2304 int flist_find(struct file_list *flist, struct file_struct *f)
2305 {
2306         int low = flist->low, high = flist->high;
2307         int diff, mid, mid_up;
2308
2309         while (low <= high) {
2310                 mid = (low + high) / 2;
2311                 if (F_IS_ACTIVE(flist->sorted[mid]))
2312                         mid_up = mid;
2313                 else {
2314                         /* Scan for the next non-empty entry using the cached
2315                          * distance values.  If the value isn't fully up-to-
2316                          * date, update it. */
2317                         mid_up = mid + F_DEPTH(flist->sorted[mid]);
2318                         if (!F_IS_ACTIVE(flist->sorted[mid_up])) {
2319                                 do {
2320                                     mid_up += F_DEPTH(flist->sorted[mid_up]);
2321                                 } while (!F_IS_ACTIVE(flist->sorted[mid_up]));
2322                                 F_DEPTH(flist->sorted[mid]) = mid_up - mid;
2323                         }
2324                         if (mid_up > high) {
2325                                 /* If there's nothing left above us, set high to
2326                                  * a non-empty entry below us and continue. */
2327                                 high = mid - (int)flist->sorted[mid]->len32;
2328                                 if (!F_IS_ACTIVE(flist->sorted[high])) {
2329                                         do {
2330                                             high -= (int)flist->sorted[high]->len32;
2331                                         } while (!F_IS_ACTIVE(flist->sorted[high]));
2332                                         flist->sorted[mid]->len32 = mid - high;
2333                                 }
2334                                 continue;
2335                         }
2336                 }
2337                 diff = f_name_cmp(flist->sorted[mid_up], f);
2338                 if (diff == 0) {
2339                         if (protocol_version < 29
2340                             && S_ISDIR(flist->sorted[mid_up]->mode)
2341                             != S_ISDIR(f->mode))
2342                                 return -1;
2343                         return mid_up;
2344                 }
2345                 if (diff < 0)
2346                         low = mid_up + 1;
2347                 else
2348                         high = mid - 1;
2349         }
2350         return -1;
2351 }
2352
2353 /*
2354  * Free up any resources a file_struct has allocated
2355  * and clear the file.
2356  */
2357 void clear_file(struct file_struct *file)
2358 {
2359         /* The +1 zeros out the first char of the basename. */
2360         memset(file, 0, FILE_STRUCT_LEN + 1);
2361         /* In an empty entry, F_DEPTH() is an offset to the next non-empty
2362          * entry.  Likewise for len32 in the opposite direction.  We assume
2363          * that we're alone for now since flist_find() will adjust the counts
2364          * it runs into that aren't up-to-date. */
2365         file->len32 = F_DEPTH(file) = 1;
2366 }
2367
2368 /* Allocate a new file list. */
2369 struct file_list *flist_new(int flags, char *msg)
2370 {
2371         struct file_list *flist;
2372
2373         if (!(flist = new0(struct file_list)))
2374                 out_of_memory(msg);
2375
2376         if (flags & FLIST_TEMP) {
2377                 if (!(flist->file_pool = pool_create(SMALL_EXTENT, 0,
2378                                                 out_of_memory, POOL_INTERN)))
2379                         out_of_memory(msg);
2380         } else {
2381                 /* This is a doubly linked list with prev looping back to
2382                  * the end of the list, but the last next pointer is NULL. */
2383                 if (!first_flist) {
2384                         flist->file_pool = pool_create(NORMAL_EXTENT, 0,
2385                                                 out_of_memory, POOL_INTERN);
2386                         if (!flist->file_pool)
2387                                 out_of_memory(msg);
2388
2389                         flist->ndx_start = flist->flist_num = inc_recurse ? 1 : 0;
2390
2391                         first_flist = cur_flist = flist->prev = flist;
2392                 } else {
2393                         struct file_list *prev = first_flist->prev;
2394
2395                         flist->file_pool = first_flist->file_pool;
2396
2397                         flist->ndx_start = prev->ndx_start + prev->used + 1;
2398                         flist->flist_num = prev->flist_num + 1;
2399
2400                         flist->prev = prev;
2401                         prev->next = first_flist->prev = flist;
2402                 }
2403                 flist->pool_boundary = pool_boundary(flist->file_pool, 0);
2404                 flist_cnt++;
2405         }
2406
2407         return flist;
2408 }
2409
2410 /* Free up all elements in a flist. */
2411 void flist_free(struct file_list *flist)
2412 {
2413         if (!flist->prev) {
2414                 /* Was FLIST_TEMP dir-list. */
2415         } else if (flist == flist->prev) {
2416                 first_flist = cur_flist = NULL;
2417                 file_total = 0;
2418                 flist_cnt = 0;
2419         } else {
2420                 if (flist == cur_flist)
2421                         cur_flist = flist->next;
2422                 if (flist == first_flist)
2423                         first_flist = first_flist->next;
2424                 else {
2425                         flist->prev->next = flist->next;
2426                         if (!flist->next)
2427                                 flist->next = first_flist;
2428                 }
2429                 flist->next->prev = flist->prev;
2430                 file_total -= flist->used;
2431                 flist_cnt--;
2432         }
2433
2434         if (!flist->prev || !flist_cnt)
2435                 pool_destroy(flist->file_pool);
2436         else
2437                 pool_free_old(flist->file_pool, flist->pool_boundary);
2438
2439         if (flist->sorted && flist->sorted != flist->files)
2440                 free(flist->sorted);
2441         free(flist->files);
2442         free(flist);
2443 }
2444
2445 /* This routine ensures we don't have any duplicate names in our file list.
2446  * duplicate names can cause corruption because of the pipelining. */
2447 static void flist_sort_and_clean(struct file_list *flist, int strip_root)
2448 {
2449         char fbuf[MAXPATHLEN];
2450         int i, prev_i;
2451
2452         if (!flist)
2453                 return;
2454         if (flist->used == 0) {
2455                 flist->high = -1;
2456                 flist->low = 0;
2457                 return;
2458         }
2459
2460         fsort(flist->sorted, flist->used);
2461
2462         if (!am_sender || inc_recurse) {
2463                 for (i = prev_i = 0; i < flist->used; i++) {
2464                         if (F_IS_ACTIVE(flist->sorted[i])) {
2465                                 prev_i = i;
2466                                 break;
2467                         }
2468                 }
2469                 flist->low = prev_i;
2470         } else {
2471                 i = prev_i = flist->used - 1;
2472                 flist->low = 0;
2473         }
2474
2475         while (++i < flist->used) {
2476                 int j;
2477                 struct file_struct *file = flist->sorted[i];
2478
2479                 if (!F_IS_ACTIVE(file))
2480                         continue;
2481                 if (f_name_cmp(file, flist->sorted[prev_i]) == 0)
2482                         j = prev_i;
2483                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
2484                         int save_mode = file->mode;
2485                         /* Make sure that this directory doesn't duplicate a
2486                          * non-directory earlier in the list. */
2487                         flist->high = prev_i;
2488                         file->mode = S_IFREG;
2489                         j = flist_find(flist, file);
2490                         file->mode = save_mode;
2491                 } else
2492                         j = -1;
2493                 if (j >= 0) {
2494                         int keep, drop;
2495                         /* If one is a dir and the other is not, we want to
2496                          * keep the dir because it might have contents in the
2497                          * list.  Otherwise keep the first one. */
2498                         if (S_ISDIR(file->mode)) {
2499                                 struct file_struct *fp = flist->sorted[j];
2500                                 if (!S_ISDIR(fp->mode))
2501                                         keep = i, drop = j;
2502                                 else {
2503                                         if (am_sender)
2504                                                 file->flags |= FLAG_DUPLICATE;
2505                                         else { /* Make sure we merge our vital flags. */
2506                                                 fp->flags |= file->flags & (FLAG_TOP_DIR|FLAG_CONTENT_DIR);
2507                                                 fp->flags &= file->flags | ~FLAG_IMPLIED_DIR;
2508                                         }
2509                                         keep = j, drop = i;
2510                                 }
2511                         } else
2512                                 keep = j, drop = i;
2513
2514                         if (!am_sender) {
2515                                 if (verbose > 1) {
2516                                         rprintf(FINFO,
2517                                             "removing duplicate name %s from file list (%d)\n",
2518                                             f_name(file, fbuf), drop + flist->ndx_start);
2519                                 }
2520                                 clear_file(flist->sorted[drop]);
2521                         }
2522
2523                         if (keep == i) {
2524                                 if (flist->low == drop) {
2525                                         for (j = drop + 1;
2526                                              j < i && !F_IS_ACTIVE(flist->sorted[j]);
2527                                              j++) {}
2528                                         flist->low = j;
2529                                 }
2530                                 prev_i = i;
2531                         }
2532                 } else
2533                         prev_i = i;
2534         }
2535         flist->high = prev_i;
2536
2537         if (strip_root) {
2538                 /* We need to strip off the leading slashes for relative
2539                  * paths, but this must be done _after_ the sorting phase. */
2540                 for (i = flist->low; i <= flist->high; i++) {
2541                         struct file_struct *file = flist->sorted[i];
2542
2543                         if (!file->dirname)
2544                                 continue;
2545                         while (*file->dirname == '/')
2546                                 file->dirname++;
2547                         if (!*file->dirname)
2548                                 file->dirname = NULL;
2549                 }
2550         }
2551
2552         if (prune_empty_dirs && !am_sender) {
2553                 int j, prev_depth = 0;
2554
2555                 prev_i = 0; /* It's OK that this isn't really true. */
2556
2557                 for (i = flist->low; i <= flist->high; i++) {
2558                         struct file_struct *fp, *file = flist->sorted[i];
2559
2560                         /* This temporarily abuses the F_DEPTH() value for a
2561                          * directory that is in a chain that might get pruned.
2562                          * We restore the old value if it gets a reprieve. */
2563                         if (S_ISDIR(file->mode) && F_DEPTH(file)) {
2564                                 /* Dump empty dirs when coming back down. */
2565                                 for (j = prev_depth; j >= F_DEPTH(file); j--) {
2566                                         fp = flist->sorted[prev_i];
2567                                         if (F_DEPTH(fp) >= 0)
2568                                                 break;
2569                                         prev_i = -F_DEPTH(fp)-1;
2570                                         clear_file(fp);
2571                                 }
2572                                 prev_depth = F_DEPTH(file);
2573                                 if (is_excluded(f_name(file, fbuf), 1,
2574                                                        ALL_FILTERS)) {
2575                                         /* Keep dirs through this dir. */
2576                                         for (j = prev_depth-1; ; j--) {
2577                                                 fp = flist->sorted[prev_i];
2578                                                 if (F_DEPTH(fp) >= 0)
2579                                                         break;
2580                                                 prev_i = -F_DEPTH(fp)-1;
2581                                                 F_DEPTH(fp) = j;
2582                                         }
2583                                 } else
2584                                         F_DEPTH(file) = -prev_i-1;
2585                                 prev_i = i;
2586                         } else {
2587                                 /* Keep dirs through this non-dir. */
2588                                 for (j = prev_depth; ; j--) {
2589                                         fp = flist->sorted[prev_i];
2590                                         if (F_DEPTH(fp) >= 0)
2591                                                 break;
2592                                         prev_i = -F_DEPTH(fp)-1;
2593                                         F_DEPTH(fp) = j;
2594                                 }
2595                         }
2596                 }
2597                 /* Dump all remaining empty dirs. */
2598                 while (1) {
2599                         struct file_struct *fp = flist->sorted[prev_i];
2600                         if (F_DEPTH(fp) >= 0)
2601                                 break;
2602                         prev_i = -F_DEPTH(fp)-1;
2603                         clear_file(fp);
2604                 }
2605
2606                 for (i = flist->low; i <= flist->high; i++) {
2607                         if (F_IS_ACTIVE(flist->sorted[i]))
2608                                 break;
2609                 }
2610                 flist->low = i;
2611                 for (i = flist->high; i >= flist->low; i--) {
2612                         if (F_IS_ACTIVE(flist->sorted[i]))
2613                                 break;
2614                 }
2615                 flist->high = i;
2616         }
2617 }
2618
2619 static void output_flist(struct file_list *flist)
2620 {
2621         char uidbuf[16], gidbuf[16], depthbuf[16];
2622         struct file_struct *file;
2623         const char *root, *dir, *slash, *name, *trail;
2624         const char *who = who_am_i();
2625         int i;
2626
2627         rprintf(FINFO, "[%s] flist start=%d, used=%d, low=%d, high=%d\n",
2628                 who, flist->ndx_start, flist->used, flist->low, flist->high);
2629         for (i = 0; i < flist->used; i++) {
2630                 file = flist->files[i];
2631                 if ((am_root || am_sender) && uid_ndx) {
2632                         snprintf(uidbuf, sizeof uidbuf, " uid=%u",
2633                                  F_OWNER(file));
2634                 } else
2635                         *uidbuf = '\0';
2636                 if (gid_ndx) {
2637                         static char parens[] = "(\0)\0\0\0";
2638                         char *pp = parens + (file->flags & FLAG_SKIP_GROUP ? 0 : 3);
2639                         snprintf(gidbuf, sizeof gidbuf, " gid=%s%u%s",
2640                                  pp, F_GROUP(file), pp + 2);
2641                 } else
2642                         *gidbuf = '\0';
2643                 if (!am_sender)
2644                         snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file));
2645                 if (F_IS_ACTIVE(file)) {
2646                         root = am_sender ? NS(F_PATHNAME(file)) : depthbuf;
2647                         if ((dir = file->dirname) == NULL)
2648                                 dir = slash = "";
2649                         else
2650                                 slash = "/";
2651                         name = file->basename;
2652                         trail = S_ISDIR(file->mode) ? "/" : "";
2653                 } else
2654                         root = dir = slash = name = trail = "";
2655                 rprintf(FINFO,
2656                         "[%s] i=%d %s %s%s%s%s mode=0%o len=%.0f%s%s flags=%x\n",
2657                         who, i + flist->ndx_start,
2658                         root, dir, slash, name, trail,
2659                         (int)file->mode, (double)F_LENGTH(file),
2660                         uidbuf, gidbuf, file->flags);
2661         }
2662 }
2663
2664 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
2665 enum fnc_type { t_PATH, t_ITEM };
2666
2667 static int found_prefix;
2668
2669 /* Compare the names of two file_struct entities, similar to how strcmp()
2670  * would do if it were operating on the joined strings.
2671  *
2672  * Some differences beginning with protocol_version 29: (1) directory names
2673  * are compared with an assumed trailing slash so that they compare in a
2674  * way that would cause them to sort immediately prior to any content they
2675  * may have; (2) a directory of any name compares after a non-directory of
2676  * any name at the same depth; (3) a directory with name "." compares prior
2677  * to anything else.  These changes mean that a directory and a non-dir
2678  * with the same name will not compare as equal (protocol_version >= 29).
2679  *
2680  * The dirname component can be an empty string, but the basename component
2681  * cannot (and never is in the current codebase).  The basename component
2682  * may be NULL (for a removed item), in which case it is considered to be
2683  * after any existing item. */
2684 int f_name_cmp(const struct file_struct *f1, const struct file_struct *f2)
2685 {
2686         int dif;
2687         const uchar *c1, *c2;
2688         enum fnc_state state1, state2;
2689         enum fnc_type type1, type2;
2690         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
2691
2692         if (!f1 || !F_IS_ACTIVE(f1)) {
2693                 if (!f2 || !F_IS_ACTIVE(f2))
2694                         return 0;
2695                 return -1;
2696         }
2697         if (!f2 || !F_IS_ACTIVE(f2))
2698                 return 1;
2699
2700         c1 = (uchar*)f1->dirname;
2701         c2 = (uchar*)f2->dirname;
2702         if (c1 == c2)
2703                 c1 = c2 = NULL;
2704         if (!c1) {
2705                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2706                 c1 = (const uchar*)f1->basename;
2707                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2708                         type1 = t_ITEM;
2709                         state1 = s_TRAILING;
2710                         c1 = (uchar*)"";
2711                 } else
2712                         state1 = s_BASE;
2713         } else {
2714                 type1 = t_path;
2715                 state1 = s_DIR;
2716         }
2717         if (!c2) {
2718                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2719                 c2 = (const uchar*)f2->basename;
2720                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2721                         type2 = t_ITEM;
2722                         state2 = s_TRAILING;
2723                         c2 = (uchar*)"";
2724                 } else
2725                         state2 = s_BASE;
2726         } else {
2727                 type2 = t_path;
2728                 state2 = s_DIR;
2729         }
2730
2731         if (type1 != type2)
2732                 return type1 == t_PATH ? 1 : -1;
2733
2734         do {
2735                 if (!*c1) {
2736                         switch (state1) {
2737                         case s_DIR:
2738                                 state1 = s_SLASH;
2739                                 c1 = (uchar*)"/";
2740                                 break;
2741                         case s_SLASH:
2742                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2743                                 c1 = (const uchar*)f1->basename;
2744                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2745                                         type1 = t_ITEM;
2746                                         state1 = s_TRAILING;
2747                                         c1 = (uchar*)"";
2748                                 } else
2749                                         state1 = s_BASE;
2750                                 break;
2751                         case s_BASE:
2752                                 state1 = s_TRAILING;
2753                                 if (type1 == t_PATH) {
2754                                         c1 = (uchar*)"/";
2755                                         break;
2756                                 }
2757                                 /* FALL THROUGH */
2758                         case s_TRAILING:
2759                                 type1 = t_ITEM;
2760                                 break;
2761                         }
2762                         if (*c2 && type1 != type2)
2763                                 return type1 == t_PATH ? 1 : -1;
2764                 }
2765                 if (!*c2) {
2766                         switch (state2) {
2767                         case s_DIR:
2768                                 state2 = s_SLASH;
2769                                 c2 = (uchar*)"/";
2770                                 break;
2771                         case s_SLASH:
2772                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2773                                 c2 = (const uchar*)f2->basename;
2774                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2775                                         type2 = t_ITEM;
2776                                         state2 = s_TRAILING;
2777                                         c2 = (uchar*)"";
2778                                 } else
2779                                         state2 = s_BASE;
2780                                 break;
2781                         case s_BASE:
2782                                 state2 = s_TRAILING;
2783                                 if (type2 == t_PATH) {
2784                                         c2 = (uchar*)"/";
2785                                         break;
2786                                 }
2787                                 /* FALL THROUGH */
2788                         case s_TRAILING:
2789                                 found_prefix = 1;
2790                                 if (!*c1)
2791                                         return 0;
2792                                 type2 = t_ITEM;
2793                                 break;
2794                         }
2795                         if (type1 != type2)
2796                                 return type1 == t_PATH ? 1 : -1;
2797                 }
2798         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
2799
2800         return dif;
2801 }
2802
2803 /* Returns 1 if f1's filename has all of f2's filename as a prefix.  This does
2804  * not match if f2's basename is not an exact match of a path element in f1.
2805  * E.g. /path/foo is not a prefix of /path/foobar/baz, but /path/foobar is. */
2806 int f_name_has_prefix(const struct file_struct *f1, const struct file_struct *f2)
2807 {
2808         found_prefix = 0;
2809         f_name_cmp(f1, f2);
2810         return found_prefix;
2811 }
2812
2813 char *f_name_buf(void)
2814 {
2815         static char names[5][MAXPATHLEN];
2816         static unsigned int n;
2817
2818         n = (n + 1) % (sizeof names / sizeof names[0]);
2819
2820         return names[n];
2821 }
2822
2823 /* Return a copy of the full filename of a flist entry, using the indicated
2824  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
2825  * done because we checked the size when creating the file_struct entry.
2826  */
2827 char *f_name(const struct file_struct *f, char *fbuf)
2828 {
2829         if (!f || !F_IS_ACTIVE(f))
2830                 return NULL;
2831
2832         if (!fbuf)
2833                 fbuf = f_name_buf();
2834
2835         if (f->dirname) {
2836                 int len = strlen(f->dirname);
2837                 memcpy(fbuf, f->dirname, len);
2838                 fbuf[len] = '/';
2839                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
2840         } else
2841                 strlcpy(fbuf, f->basename, MAXPATHLEN);
2842
2843         return fbuf;
2844 }
2845
2846 /* Do a non-recursive scan of the named directory, possibly ignoring all
2847  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
2848  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
2849  * buffer (the functions we call will append names onto the end, but the old
2850  * dir value will be restored on exit). */
2851 struct file_list *get_dirlist(char *dirname, int dlen, int ignore_filter_rules)
2852 {
2853         struct file_list *dirlist;
2854         char dirbuf[MAXPATHLEN];
2855         int save_recurse = recurse;
2856         int save_xfer_dirs = xfer_dirs;
2857         int save_prune_empty_dirs = prune_empty_dirs;
2858
2859         if (dlen < 0) {
2860                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
2861                 if (dlen >= MAXPATHLEN)
2862                         return NULL;
2863                 dirname = dirbuf;
2864         }
2865
2866         dirlist = flist_new(FLIST_TEMP, "get_dirlist");
2867
2868         recurse = 0;
2869         xfer_dirs = 1;
2870         send_directory(ignore_filter_rules ? -2 : -1, dirlist, dirname, dlen, 0);
2871         xfer_dirs = save_xfer_dirs;
2872         recurse = save_recurse;
2873         if (do_progress)
2874                 flist_count_offset += dirlist->used;
2875
2876         prune_empty_dirs = 0;
2877         dirlist->sorted = dirlist->files;
2878         flist_sort_and_clean(dirlist, 0);
2879         prune_empty_dirs = save_prune_empty_dirs;
2880
2881         if (verbose > 3)
2882                 output_flist(dirlist);
2883
2884         return dirlist;
2885 }