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