flist.c

   1 /*
   2  * Generate and receive file lists.
   3  *
   4  * Copyright (C) 1996 Andrew Tridgell
   5  * Copyright (C) 1996 Paul Mackerras
   6  * Copyright (C) 2001, 2002 Martin Pool <mbp@samba.org>
   7  * Copyright (C) 2002-2008 Wayne Davison
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 3 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, visit the http://fsf.org website.
  21  */
  22
  23 #include "rsync.h"
  24 #include "ifuncs.h"
  25 #include "rounding.h"
  26 #include "io.h"
  27
  28 extern int verbose;
  29 extern int am_root;
  30 extern int am_server;
  31 extern int am_daemon;
  32 extern int am_sender;
  33 extern int am_generator;
  34 extern int inc_recurse;
  35 extern int do_progress;
  36 extern int always_checksum;
  37 extern int module_id;
  38 extern int ignore_errors;
  39 extern int numeric_ids;
  40 extern int recurse;
  41 extern int use_qsort;
  42 extern int xfer_dirs;
  43 extern int filesfrom_fd;
  44 extern int one_file_system;
  45 extern int copy_dirlinks;
  46 extern int keep_dirlinks;
  47 extern int preserve_uid;
  48 extern int preserve_gid;
  49 extern int preserve_acls;
  50 extern int preserve_xattrs;
  51 extern int preserve_links;
  52 extern int preserve_hard_links;
  53 extern int preserve_devices;
  54 extern int preserve_specials;
  55 extern int uid_ndx;
  56 extern int gid_ndx;
  57 extern int eol_nulls;
  58 extern int relative_paths;
  59 extern int implied_dirs;
  60 extern int file_extra_cnt;
  61 extern int ignore_perishable;
  62 extern int non_perishable_cnt;
  63 extern int prune_empty_dirs;
  64 extern int copy_links;
  65 extern int copy_unsafe_links;
  66 extern int protocol_version;
  67 extern int sanitize_paths;
  68 extern int munge_symlinks;
  69 extern int need_unsorted_flist;
  70 extern int unsort_ndx;
  71 extern struct stats stats;
  72 extern char *filesfrom_host;
  73
  74 extern char curr_dir[MAXPATHLEN];
  75
  76 extern struct chmod_mode_struct *chmod_modes;
  77
  78 extern struct filter_list_struct filter_list;
  79 extern struct filter_list_struct daemon_filter_list;
  80
  81 #ifdef ICONV_OPTION
  82 extern int filesfrom_convert;
  83 extern iconv_t ic_send, ic_recv;
  84 #endif
  85
  86 #define PTR_SIZE (sizeof (struct file_struct *))
  87
  88 int io_error;
  89 int checksum_len;
  90 dev_t filesystem_dev; /* used to implement -x */
  91
  92 struct file_list *cur_flist, *first_flist, *dir_flist;
  93 int send_dir_ndx = -1, send_dir_depth = -1;
  94 int flist_cnt = 0; /* how many (non-tmp) file list objects exist */
  95 int file_total = 0; /* total of all active items over all file-lists */
  96 int flist_eof = 0; /* all the file-lists are now known */
  97
  98 #define NORMAL_NAME 0
  99 #define SLASH_ENDING_NAME 1
 100 #define DOTDIR_NAME 2
 101
 102 /* Starting from protocol version 26, we always use 64-bit ino_t and dev_t
 103  * internally, even if this platform does not allow files to have 64-bit inums.
 104  * The only exception is if we're on a platform with no 64-bit type at all.
 105  *
 106  * Because we use read_longint() to get these off the wire, if you transfer
 107  * devices or (for protocols < 30) hardlinks with dev or inum > 2**32 to a
 108  * machine with no 64-bit types then you will get an overflow error.
 109  *
 110  * Note that if you transfer devices from a 64-bit-devt machine (say, Solaris)
 111  * to a 32-bit-devt machine (say, Linux-2.2/x86) then the device numbers will
 112  * be truncated.  But it's a kind of silly thing to do anyhow. */
 113
 114 /* The tmp_* vars are used as a cache area by make_file() to store data
 115  * that the sender doesn't need to remember in its file list.  The data
 116  * will survive just long enough to be used by send_file_entry(). */
 117 static dev_t tmp_rdev;
 118 #ifdef SUPPORT_HARD_LINKS
 119 static int64 tmp_dev, tmp_ino;
 120 #endif
 121 static char tmp_sum[MAX_DIGEST_LEN];
 122
 123 static char empty_sum[MAX_DIGEST_LEN];
 124 static int flist_count_offset; /* for --delete --progress */
 125 static int dir_count = 0;
 126
 127 static void flist_sort_and_clean(struct file_list *flist, int strip_root);
 128 static void output_flist(struct file_list *flist);
 129
 130 void init_flist(void)
 131 {
 132         if (verbose > 4) {
 133                 rprintf(FINFO, "FILE_STRUCT_LEN=%d, EXTRA_LEN=%d\n",
 134                         (int)FILE_STRUCT_LEN, (int)EXTRA_LEN);
 135         }
 136         checksum_len = protocol_version < 21 ? 2
 137                      : protocol_version < 30 ? MD4_DIGEST_LEN
 138                      : MD5_DIGEST_LEN;
 139 }
 140
 141 static int show_filelist_p(void)
 142 {
 143         return verbose && xfer_dirs && !am_server && !inc_recurse;
 144 }
 145
 146 static void start_filelist_progress(char *kind)
 147 {
 148         rprintf(FCLIENT, "%s ... ", kind);
 149         if (verbose > 1 || do_progress)
 150                 rprintf(FCLIENT, "\n");
 151         rflush(FINFO);
 152 }
 153
 154 static void emit_filelist_progress(int count)
 155 {
 156         rprintf(FCLIENT, " %d files...\r", count);
 157 }
 158
 159 static void maybe_emit_filelist_progress(int count)
 160 {
 161         if (do_progress && show_filelist_p() && (count % 100) == 0)
 162                 emit_filelist_progress(count);
 163 }
 164
 165 static void finish_filelist_progress(const struct file_list *flist)
 166 {
 167         if (do_progress) {
 168                 /* This overwrites the progress line */
 169                 rprintf(FINFO, "%d file%sto consider\n",
 170                         flist->used, flist->used == 1 ? " " : "s ");
 171         } else
 172                 rprintf(FINFO, "done\n");
 173 }
 174
 175 void show_flist_stats(void)
 176 {
 177         /* Nothing yet */
 178 }
 179
 180 /* Stat either a symlink or its referent, depending on the settings of
 181  * copy_links, copy_unsafe_links, etc.  Returns -1 on error, 0 on success.
 182  *
 183  * If path is the name of a symlink, then the linkbuf buffer (which must hold
 184  * MAXPATHLEN chars) will be set to the symlink's target string.
 185  *
 186  * The stat structure pointed to by stp will contain information about the
 187  * link or the referent as appropriate, if they exist. */
 188 static int readlink_stat(const char *path, STRUCT_STAT *stp, char *linkbuf)
 189 {
 190 #ifdef SUPPORT_LINKS
 191         if (link_stat(path, stp, copy_dirlinks) < 0)
 192                 return -1;
 193         if (S_ISLNK(stp->st_mode)) {
 194                 int llen = readlink(path, linkbuf, MAXPATHLEN - 1);
 195                 if (llen < 0)
 196                         return -1;
 197                 linkbuf[llen] = '\0';
 198                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 199                         if (verbose > 1) {
 200                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 201                                         path, linkbuf);
 202                         }
 203                         return x_stat(path, stp, NULL);
 204                 }
 205                 if (munge_symlinks && am_sender && llen > SYMLINK_PREFIX_LEN
 206                  && strncmp(linkbuf, SYMLINK_PREFIX, SYMLINK_PREFIX_LEN) == 0) {
 207                         memmove(linkbuf, linkbuf + SYMLINK_PREFIX_LEN,
 208                                 llen - SYMLINK_PREFIX_LEN + 1);
 209                 }
 210         }
 211         return 0;
 212 #else
 213         return x_stat(path, stp, NULL);
 214 #endif
 215 }
 216
 217 int link_stat(const char *path, STRUCT_STAT *stp, int follow_dirlinks)
 218 {
 219 #ifdef SUPPORT_LINKS
 220         if (copy_links)
 221                 return x_stat(path, stp, NULL);
 222         if (x_lstat(path, stp, NULL) < 0)
 223                 return -1;
 224         if (follow_dirlinks && S_ISLNK(stp->st_mode)) {
 225                 STRUCT_STAT st;
 226                 if (x_stat(path, &st, NULL) == 0 && S_ISDIR(st.st_mode))
 227                         *stp = st;
 228         }
 229         return 0;
 230 #else
 231         return x_stat(path, stp, NULL);
 232 #endif
 233 }
 234
 235 static inline int is_daemon_excluded(const char *fname, int is_dir)
 236 {
 237         if (daemon_filter_list.head
 238          && check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
 239                 errno = ENOENT;
 240                 return 1;
 241         }
 242         return 0;
 243 }
 244
 245 static inline int path_is_daemon_excluded(char *path, int ignore_filename)
 246 {
 247         if (daemon_filter_list.head) {
 248                 char *slash = path;
 249
 250                 while ((slash = strchr(slash+1, '/')) != NULL) {
 251                         int ret;
 252                         *slash = '\0';
 253                         ret = check_filter(&daemon_filter_list, FLOG, path, 1);
 254                         *slash = '/';
 255                         if (ret < 0) {
 256                                 errno = ENOENT;
 257                                 return 1;
 258                         }
 259                 }
 260
 261                 if (!ignore_filename
 262                  && check_filter(&daemon_filter_list, FLOG, path, 1) < 0) {
 263                         errno = ENOENT;
 264                         return 1;
 265                 }
 266         }
 267
 268         return 0;
 269 }
 270
 271 /* This function is used to check if a file should be included/excluded
 272  * from the list of files based on its name and type etc.  The value of
 273  * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
 274 static int is_excluded(const char *fname, int is_dir, int filter_level)
 275 {
 276 #if 0 /* This currently never happens, so avoid a useless compare. */
 277         if (filter_level == NO_FILTERS)
 278                 return 0;
 279 #endif
 280         if (is_daemon_excluded(fname, is_dir))
 281                 return 1;
 282         if (filter_level != ALL_FILTERS)
 283                 return 0;
 284         if (filter_list.head
 285             && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
 286                 return 1;
 287         return 0;
 288 }
 289
 290 static void send_directory(int f, struct file_list *flist,
 291                            char *fbuf, int len, int flags);
 292
 293 static const char *pathname, *orig_dir;
 294 static int pathname_len;
 295
 296 /* Make sure flist can hold at least flist->used + extra entries. */
 297 static void flist_expand(struct file_list *flist, int extra)
 298 {
 299         struct file_struct **new_ptr;
 300
 301         if (flist->used + extra <= flist->malloced)
 302                 return;
 303
 304         if (flist->malloced < FLIST_START)
 305                 flist->malloced = FLIST_START;
 306         else if (flist->malloced >= FLIST_LINEAR)
 307                 flist->malloced += FLIST_LINEAR;
 308         else
 309                 flist->malloced *= 2;
 310
 311         /* In case count jumped or we are starting the list
 312          * with a known size just set it. */
 313         if (flist->malloced < flist->used + extra)
 314                 flist->malloced = flist->used + extra;
 315
 316         new_ptr = realloc_array(flist->files, struct file_struct *,
 317                                 flist->malloced);
 318
 319         if (verbose >= 2 && flist->malloced != FLIST_START) {
 320                 rprintf(FCLIENT, "[%s] expand file_list pointer array to %.0f bytes, did%s move\n",
 321                     who_am_i(),
 322                     (double)sizeof flist->files[0] * flist->malloced,
 323                     (new_ptr == flist->files) ? " not" : "");
 324         }
 325
 326         flist->files = new_ptr;
 327
 328         if (!flist->files)
 329                 out_of_memory("flist_expand");
 330 }
 331
 332 static void flist_done_allocating(struct file_list *flist)
 333 {
 334         void *ptr = pool_boundary(flist->file_pool, 8*1024);
 335         if (flist->pool_boundary == ptr)
 336                 flist->pool_boundary = NULL; /* list didn't use any pool memory */
 337         else
 338                 flist->pool_boundary = ptr;
 339 }
 340
 341 /* Call this with EITHER (1) "file, NULL, 0" to chdir() to the file's
 342  * F_PATHNAME(), or (2) "NULL, dir, dirlen" to chdir() to the supplied dir,
 343  * with dir == NULL taken to be the starting directory, and dirlen < 0
 344  * indicating that strdup(dir) should be called and then the -dirlen length
 345  * value checked to ensure that it is not daemon-excluded. */
 346 int change_pathname(struct file_struct *file, const char *dir, int dirlen)
 347 {
 348         if (dirlen < 0) {
 349                 char *cpy = strdup(dir);
 350                 if (*cpy != '/')
 351                         change_dir(orig_dir, CD_SKIP_CHDIR);
 352                 if (path_is_daemon_excluded(cpy, 0))
 353                         goto chdir_error;
 354                 dir = cpy;
 355                 dirlen = -dirlen;
 356         } else {
 357                 if (file) {
 358                         if (pathname == F_PATHNAME(file))
 359                                 return 1;
 360                         dir = F_PATHNAME(file);
 361                         if (dir)
 362                                 dirlen = strlen(dir);
 363                 } else if (pathname == dir)
 364                         return 1;
 365                 if (dir && *dir != '/')
 366                         change_dir(orig_dir, CD_SKIP_CHDIR);
 367         }
 368
 369         pathname = dir;
 370         pathname_len = dirlen;
 371
 372         if (!dir)
 373                 dir = orig_dir;
 374
 375         if (!change_dir(dir, CD_NORMAL)) {
 376           chdir_error:
 377                 io_error |= IOERR_GENERAL;
 378                 rsyserr(FERROR_XFER, errno, "change_dir %s failed", full_fname(dir));
 379                 if (dir != orig_dir)
 380                         change_dir(orig_dir, CD_NORMAL);
 381                 pathname = NULL;
 382                 pathname_len = 0;
 383                 return 0;
 384         }
 385
 386         return 1;
 387 }
 388
 389 static void send_file_entry(int f, const char *fname, struct file_struct *file,
 390 #ifdef SUPPORT_LINKS
 391                             const char *symlink_name, int symlink_len,
 392 #endif
 393                             int ndx, int first_ndx)
 394 {
 395         static time_t modtime;
 396         static mode_t mode;
 397 #ifdef SUPPORT_HARD_LINKS
 398         static int64 dev;
 399 #endif
 400         static dev_t rdev;
 401         static uint32 rdev_major;
 402         static uid_t uid;
 403         static gid_t gid;
 404         static const char *user_name, *group_name;
 405         static char lastname[MAXPATHLEN];
 406         int first_hlink_ndx = -1;
 407         int l1, l2;
 408         int xflags;
 409
 410         /* Initialize starting value of xflags. */
 411         if (protocol_version >= 30 && S_ISDIR(file->mode)) {
 412                 dir_count++;
 413                 if (file->flags & FLAG_CONTENT_DIR)
 414                         xflags = file->flags & FLAG_TOP_DIR;
 415                 else if (file->flags & FLAG_IMPLIED_DIR)
 416                         xflags = XMIT_TOP_DIR | XMIT_NO_CONTENT_DIR;
 417                 else
 418                         xflags = XMIT_NO_CONTENT_DIR;
 419         } else
 420                 xflags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */
 421
 422         if (file->mode == mode)
 423                 xflags |= XMIT_SAME_MODE;
 424         else
 425                 mode = file->mode;
 426
 427         if ((preserve_devices && IS_DEVICE(mode))
 428          || (preserve_specials && IS_SPECIAL(mode))) {
 429                 if (protocol_version < 28) {
 430                         if (tmp_rdev == rdev)
 431                                 xflags |= XMIT_SAME_RDEV_pre28;
 432                         else
 433                                 rdev = tmp_rdev;
 434                 } else {
 435                         rdev = tmp_rdev;
 436                         if ((uint32)major(rdev) == rdev_major)
 437                                 xflags |= XMIT_SAME_RDEV_MAJOR;
 438                         else
 439                                 rdev_major = major(rdev);
 440                         if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu)
 441                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
 442                 }
 443         } else if (protocol_version < 28)
 444                 rdev = MAKEDEV(0, 0);
 445         if (!preserve_uid || ((uid_t)F_OWNER(file) == uid && *lastname))
 446                 xflags |= XMIT_SAME_UID;
 447         else {
 448                 uid = F_OWNER(file);
 449                 if (!numeric_ids) {
 450                         user_name = add_uid(uid);
 451                         if (inc_recurse && user_name)
 452                                 xflags |= XMIT_USER_NAME_FOLLOWS;
 453                 }
 454         }
 455         if (!preserve_gid || ((gid_t)F_GROUP(file) == gid && *lastname))
 456                 xflags |= XMIT_SAME_GID;
 457         else {
 458                 gid = F_GROUP(file);
 459                 if (!numeric_ids) {
 460                         group_name = add_gid(gid);
 461                         if (inc_recurse && group_name)
 462                                 xflags |= XMIT_GROUP_NAME_FOLLOWS;
 463                 }
 464         }
 465         if (file->modtime == modtime)
 466                 xflags |= XMIT_SAME_TIME;
 467         else
 468                 modtime = file->modtime;
 469
 470 #ifdef SUPPORT_HARD_LINKS
 471         if (tmp_dev != 0) {
 472                 if (protocol_version >= 30) {
 473                         struct ht_int64_node *np = idev_find(tmp_dev, tmp_ino);
 474                         first_hlink_ndx = (int32)(long)np->data - 1;
 475                         if (first_hlink_ndx < 0) {
 476                                 np->data = (void*)(long)(first_ndx + ndx + 1);
 477                                 xflags |= XMIT_HLINK_FIRST;
 478                         }
 479                 } else {
 480                         if (tmp_dev == dev) {
 481                                 if (protocol_version >= 28)
 482                                         xflags |= XMIT_SAME_DEV_pre30;
 483                         } else
 484                                 dev = tmp_dev;
 485                 }
 486                 xflags |= XMIT_HLINKED;
 487         }
 488 #endif
 489
 490         for (l1 = 0;
 491             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 492             l1++) {}
 493         l2 = strlen(fname+l1);
 494
 495         if (l1 > 0)
 496                 xflags |= XMIT_SAME_NAME;
 497         if (l2 > 255)
 498                 xflags |= XMIT_LONG_NAME;
 499
 500         /* We must make sure we don't send a zero flag byte or the
 501          * other end will terminate the flist transfer.  Note that
 502          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 503          * it's harmless way to add a bit to the first flag byte. */
 504         if (protocol_version >= 28) {
 505                 if (!xflags && !S_ISDIR(mode))
 506                         xflags |= XMIT_TOP_DIR;
 507                 if ((xflags & 0xFF00) || !xflags) {
 508                         xflags |= XMIT_EXTENDED_FLAGS;
 509                         write_shortint(f, xflags);
 510                 } else
 511                         write_byte(f, xflags);
 512         } else {
 513                 if (!(xflags & 0xFF))
 514                         xflags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
 515                 write_byte(f, xflags);
 516         }
 517         if (xflags & XMIT_SAME_NAME)
 518                 write_byte(f, l1);
 519         if (xflags & XMIT_LONG_NAME)
 520                 write_varint30(f, l2);
 521         else
 522                 write_byte(f, l2);
 523         write_buf(f, fname + l1, l2);
 524
 525         if (first_hlink_ndx >= 0) {
 526                 write_varint(f, first_hlink_ndx);
 527                 if (first_hlink_ndx >= first_ndx)
 528                         goto the_end;
 529         }
 530
 531         write_varlong30(f, F_LENGTH(file), 3);
 532         if (!(xflags & XMIT_SAME_TIME)) {
 533                 if (protocol_version >= 30)
 534                         write_varlong(f, modtime, 4);
 535                 else
 536                         write_int(f, modtime);
 537         }
 538         if (!(xflags & XMIT_SAME_MODE))
 539                 write_int(f, to_wire_mode(mode));
 540         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
 541                 if (protocol_version < 30)
 542                         write_int(f, uid);
 543                 else {
 544                         write_varint(f, uid);
 545                         if (xflags & XMIT_USER_NAME_FOLLOWS) {
 546                                 int len = strlen(user_name);
 547                                 write_byte(f, len);
 548                                 write_buf(f, user_name, len);
 549                         }
 550                 }
 551         }
 552         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
 553                 if (protocol_version < 30)
 554                         write_int(f, gid);
 555                 else {
 556                         write_varint(f, gid);
 557                         if (xflags & XMIT_GROUP_NAME_FOLLOWS) {
 558                                 int len = strlen(group_name);
 559                                 write_byte(f, len);
 560                                 write_buf(f, group_name, len);
 561                         }
 562                 }
 563         }
 564         if ((preserve_devices && IS_DEVICE(mode))
 565          || (preserve_specials && IS_SPECIAL(mode))) {
 566                 if (protocol_version < 28) {
 567                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 568                                 write_int(f, (int)rdev);
 569                 } else {
 570                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 571                                 write_varint30(f, major(rdev));
 572                         if (protocol_version >= 30)
 573                                 write_varint(f, minor(rdev));
 574                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 575                                 write_byte(f, minor(rdev));
 576                         else
 577                                 write_int(f, minor(rdev));
 578                 }
 579         }
 580
 581 #ifdef SUPPORT_LINKS
 582         if (symlink_len) {
 583                 write_varint30(f, symlink_len);
 584                 write_buf(f, symlink_name, symlink_len);
 585         }
 586 #endif
 587
 588 #ifdef SUPPORT_HARD_LINKS
 589         if (tmp_dev != 0 && protocol_version < 30) {
 590                 if (protocol_version < 26) {
 591                         /* 32-bit dev_t and ino_t */
 592                         write_int(f, (int32)dev);
 593                         write_int(f, (int32)tmp_ino);
 594                 } else {
 595                         /* 64-bit dev_t and ino_t */
 596                         if (!(xflags & XMIT_SAME_DEV_pre30))
 597                                 write_longint(f, dev);
 598                         write_longint(f, tmp_ino);
 599                 }
 600         }
 601 #endif
 602
 603         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 604                 const char *sum;
 605                 if (S_ISREG(mode))
 606                         sum = tmp_sum;
 607                 else {
 608                         /* Prior to 28, we sent a useless set of nulls. */
 609                         sum = empty_sum;
 610                 }
 611                 write_buf(f, sum, checksum_len);
 612         }
 613
 614   the_end:
 615         strlcpy(lastname, fname, MAXPATHLEN);
 616
 617         if (S_ISREG(mode) || S_ISLNK(mode))
 618                 stats.total_size += F_LENGTH(file);
 619 }
 620
 621 static struct file_struct *recv_file_entry(struct file_list *flist,
 622                                            int xflags, int f)
 623 {
 624         static int64 modtime;
 625         static mode_t mode;
 626 #ifdef SUPPORT_HARD_LINKS
 627         static int64 dev;
 628 #endif
 629         static dev_t rdev;
 630         static uint32 rdev_major;
 631         static uid_t uid;
 632         static gid_t gid;
 633         static uint16 gid_flags;
 634         static char lastname[MAXPATHLEN], *lastdir;
 635         static int lastdir_depth, lastdir_len = -1;
 636         static unsigned int del_hier_name_len = 0;
 637         static int in_del_hier = 0;
 638         char thisname[MAXPATHLEN];
 639         unsigned int l1 = 0, l2 = 0;
 640         int alloc_len, basename_len, linkname_len;
 641         int extra_len = file_extra_cnt * EXTRA_LEN;
 642         int first_hlink_ndx = -1;
 643         int64 file_length;
 644         const char *basename;
 645         struct file_struct *file;
 646         alloc_pool_t *pool;
 647         char *bp;
 648
 649         if (xflags & XMIT_SAME_NAME)
 650                 l1 = read_byte(f);
 651
 652         if (xflags & XMIT_LONG_NAME)
 653                 l2 = read_varint30(f);
 654         else
 655                 l2 = read_byte(f);
 656
 657         if (l2 >= MAXPATHLEN - l1) {
 658                 rprintf(FERROR,
 659                         "overflow: xflags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
 660                         xflags, l1, l2, lastname, who_am_i());
 661                 overflow_exit("recv_file_entry");
 662         }
 663
 664         strlcpy(thisname, lastname, l1 + 1);
 665         read_sbuf(f, &thisname[l1], l2);
 666         thisname[l1 + l2] = 0;
 667
 668         /* Abuse basename_len for a moment... */
 669         basename_len = strlcpy(lastname, thisname, MAXPATHLEN);
 670
 671 #ifdef ICONV_OPTION
 672         if (ic_recv != (iconv_t)-1) {
 673                 xbuf outbuf, inbuf;
 674
 675                 INIT_CONST_XBUF(outbuf, thisname);
 676                 INIT_XBUF(inbuf, lastname, basename_len, -1);
 677
 678                 if (iconvbufs(ic_recv, &inbuf, &outbuf, 0) < 0) {
 679                         io_error |= IOERR_GENERAL;
 680                         rprintf(FERROR_XFER,
 681                             "[%s] cannot convert filename: %s (%s)\n",
 682                             who_am_i(), lastname, strerror(errno));
 683                         outbuf.len = 0;
 684                 }
 685                 thisname[outbuf.len] = '\0';
 686         }
 687 #endif
 688
 689         if (*thisname)
 690                 clean_fname(thisname, 0);
 691
 692         if (sanitize_paths)
 693                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
 694
 695         if ((basename = strrchr(thisname, '/')) != NULL) {
 696                 int len = basename++ - thisname;
 697                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
 698                         lastdir = new_array(char, len + 1);
 699                         memcpy(lastdir, thisname, len);
 700                         lastdir[len] = '\0';
 701                         lastdir_len = len;
 702                         lastdir_depth = count_dir_elements(lastdir);
 703                 }
 704         } else
 705                 basename = thisname;
 706         basename_len = strlen(basename) + 1; /* count the '\0' */
 707
 708 #ifdef SUPPORT_HARD_LINKS
 709         if (protocol_version >= 30
 710          && BITS_SETnUNSET(xflags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
 711                 first_hlink_ndx = read_varint(f);
 712                 if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->ndx_start + flist->used) {
 713                         rprintf(FERROR,
 714                                 "hard-link reference out of range: %d (%d)\n",
 715                                 first_hlink_ndx, flist->ndx_start + flist->used);
 716                         exit_cleanup(RERR_PROTOCOL);
 717                 }
 718                 if (first_hlink_ndx >= flist->ndx_start) {
 719                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 720                         file_length = F_LENGTH(first);
 721                         modtime = first->modtime;
 722                         mode = first->mode;
 723                         if (preserve_uid)
 724                                 uid = F_OWNER(first);
 725                         if (preserve_gid)
 726                                 gid = F_GROUP(first);
 727                         if ((preserve_devices && IS_DEVICE(mode))
 728                          || (preserve_specials && IS_SPECIAL(mode))) {
 729                                 uint32 *devp = F_RDEV_P(first);
 730                                 rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
 731                                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 732                         }
 733                         if (preserve_links && S_ISLNK(mode))
 734                                 linkname_len = strlen(F_SYMLINK(first)) + 1;
 735                         else
 736                                 linkname_len = 0;
 737                         goto create_object;
 738                 }
 739         }
 740 #endif
 741
 742         file_length = read_varlong30(f, 3);
 743         if (!(xflags & XMIT_SAME_TIME)) {
 744                 if (protocol_version >= 30) {
 745                         modtime = read_varlong(f, 4);
 746 #if SIZEOF_TIME_T < SIZEOF_INT64
 747                         if (!am_generator && (int64)(time_t)modtime != modtime) {
 748                                 rprintf(FERROR_XFER,
 749                                     "Time value of %s truncated on receiver.\n",
 750                                     lastname);
 751                         }
 752 #endif
 753                 } else
 754                         modtime = read_int(f);
 755         }
 756         if (!(xflags & XMIT_SAME_MODE))
 757                 mode = from_wire_mode(read_int(f));
 758
 759         if (chmod_modes && !S_ISLNK(mode))
 760                 mode = tweak_mode(mode, chmod_modes);
 761
 762         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
 763                 if (protocol_version < 30)
 764                         uid = (uid_t)read_int(f);
 765                 else {
 766                         uid = (uid_t)read_varint(f);
 767                         if (xflags & XMIT_USER_NAME_FOLLOWS)
 768                                 uid = recv_user_name(f, uid);
 769                         else if (inc_recurse && am_root && !numeric_ids)
 770                                 uid = match_uid(uid);
 771                 }
 772         }
 773         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
 774                 if (protocol_version < 30)
 775                         gid = (gid_t)read_int(f);
 776                 else {
 777                         gid = (gid_t)read_varint(f);
 778                         gid_flags = 0;
 779                         if (xflags & XMIT_GROUP_NAME_FOLLOWS)
 780                                 gid = recv_group_name(f, gid, &gid_flags);
 781                         else if (inc_recurse && (!am_root || !numeric_ids))
 782                                 gid = match_gid(gid, &gid_flags);
 783                 }
 784         }
 785
 786         if ((preserve_devices && IS_DEVICE(mode))
 787          || (preserve_specials && IS_SPECIAL(mode))) {
 788                 if (protocol_version < 28) {
 789                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 790                                 rdev = (dev_t)read_int(f);
 791                 } else {
 792                         uint32 rdev_minor;
 793                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 794                                 rdev_major = read_varint30(f);
 795                         if (protocol_version >= 30)
 796                                 rdev_minor = read_varint(f);
 797                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 798                                 rdev_minor = read_byte(f);
 799                         else
 800                                 rdev_minor = read_int(f);
 801                         rdev = MAKEDEV(rdev_major, rdev_minor);
 802                 }
 803                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 804                 file_length = 0;
 805         } else if (protocol_version < 28)
 806                 rdev = MAKEDEV(0, 0);
 807
 808 #ifdef SUPPORT_LINKS
 809         if (preserve_links && S_ISLNK(mode)) {
 810                 linkname_len = read_varint30(f) + 1; /* count the '\0' */
 811                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 812                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 813                                 linkname_len - 1);
 814                         overflow_exit("recv_file_entry");
 815                 }
 816 #ifdef ICONV_OPTION
 817                 /* We don't know how much extra room we need to convert
 818                  * the as-yet-unread symlink name when converting it,
 819                  * so let's hope that a double-size buffer is plenty. */
 820                 if (ic_recv != (iconv_t)-1)
 821                         linkname_len = linkname_len * 2 + 1;
 822 #endif
 823                 if (munge_symlinks)
 824                         linkname_len += SYMLINK_PREFIX_LEN;
 825         }
 826         else
 827 #endif
 828                 linkname_len = 0;
 829
 830 #ifdef SUPPORT_HARD_LINKS
 831   create_object:
 832         if (preserve_hard_links) {
 833                 if (protocol_version < 28 && S_ISREG(mode))
 834                         xflags |= XMIT_HLINKED;
 835                 if (xflags & XMIT_HLINKED)
 836                         extra_len += (inc_recurse+1) * EXTRA_LEN;
 837         }
 838 #endif
 839
 840 #ifdef SUPPORT_ACLS
 841         /* Directories need an extra int32 for the default ACL. */
 842         if (preserve_acls && S_ISDIR(mode))
 843                 extra_len += EXTRA_LEN;
 844 #endif
 845
 846         if (always_checksum && S_ISREG(mode))
 847                 extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
 848
 849 #if SIZEOF_INT64 >= 8
 850         if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
 851                 extra_len += EXTRA_LEN;
 852 #endif
 853         if (file_length < 0) {
 854                 rprintf(FERROR, "Offset underflow: file-length is negative\n");
 855                 exit_cleanup(RERR_UNSUPPORTED);
 856         }
 857
 858         if (inc_recurse && S_ISDIR(mode)) {
 859                 if (one_file_system) {
 860                         /* Room to save the dir's device for -x */
 861                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 862                 }
 863                 pool = dir_flist->file_pool;
 864         } else
 865                 pool = flist->file_pool;
 866
 867 #if EXTRA_ROUNDING > 0
 868         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
 869                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
 870 #endif
 871
 872         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
 873                   + linkname_len;
 874         bp = pool_alloc(pool, alloc_len, "recv_file_entry");
 875
 876         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
 877         bp += extra_len;
 878         file = (struct file_struct *)bp;
 879         bp += FILE_STRUCT_LEN;
 880
 881         memcpy(bp, basename, basename_len);
 882
 883 #ifdef SUPPORT_HARD_LINKS
 884         if (xflags & XMIT_HLINKED)
 885                 file->flags |= FLAG_HLINKED;
 886 #endif
 887         file->modtime = (time_t)modtime;
 888         file->len32 = (uint32)file_length;
 889 #if SIZEOF_INT64 >= 8
 890         if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
 891 #if SIZEOF_CAPITAL_OFF_T < 8
 892                 rprintf(FERROR, "Offset overflow: attempted 64-bit file-length\n");
 893                 exit_cleanup(RERR_UNSUPPORTED);
 894 #else
 895                 file->flags |= FLAG_LENGTH64;
 896                 OPT_EXTRA(file, 0)->unum = (uint32)(file_length >> 32);
 897 #endif
 898         }
 899 #endif
 900         file->mode = mode;
 901         if (preserve_uid)
 902                 F_OWNER(file) = uid;
 903         if (preserve_gid) {
 904                 F_GROUP(file) = gid;
 905                 file->flags |= gid_flags;
 906         }
 907         if (unsort_ndx)
 908                 F_NDX(file) = flist->used + flist->ndx_start;
 909
 910         if (basename != thisname) {
 911                 file->dirname = lastdir;
 912                 F_DEPTH(file) = lastdir_depth + 1;
 913         } else
 914                 F_DEPTH(file) = 1;
 915
 916         if (S_ISDIR(mode)) {
 917                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
 918                         F_DEPTH(file)--;
 919                 if (protocol_version >= 30) {
 920                         if (!(xflags & XMIT_NO_CONTENT_DIR)) {
 921                                 if (xflags & XMIT_TOP_DIR)
 922                                         file->flags |= FLAG_TOP_DIR;
 923                                 file->flags |= FLAG_CONTENT_DIR;
 924                         } else if (xflags & XMIT_TOP_DIR)
 925                                 file->flags |= FLAG_IMPLIED_DIR;
 926                 } else if (xflags & XMIT_TOP_DIR) {
 927                         in_del_hier = recurse;
 928                         del_hier_name_len = F_DEPTH(file) == 0 ? 0 : l1 + l2;
 929                         if (relative_paths && del_hier_name_len > 2
 930                             && lastname[del_hier_name_len-1] == '.'
 931                             && lastname[del_hier_name_len-2] == '/')
 932                                 del_hier_name_len -= 2;
 933                         file->flags |= FLAG_TOP_DIR | FLAG_CONTENT_DIR;
 934                 } else if (in_del_hier) {
 935                         if (!relative_paths || !del_hier_name_len
 936                          || (l1 >= del_hier_name_len
 937                           && lastname[del_hier_name_len] == '/'))
 938                                 file->flags |= FLAG_CONTENT_DIR;
 939                         else
 940                                 in_del_hier = 0;
 941                 }
 942         }
 943
 944         if ((preserve_devices && IS_DEVICE(mode))
 945          || (preserve_specials && IS_SPECIAL(mode))) {
 946                 uint32 *devp = F_RDEV_P(file);
 947                 DEV_MAJOR(devp) = major(rdev);
 948                 DEV_MINOR(devp) = minor(rdev);
 949         }
 950
 951 #ifdef SUPPORT_LINKS
 952         if (linkname_len) {
 953                 bp += basename_len;
 954                 if (first_hlink_ndx >= flist->ndx_start) {
 955                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 956                         memcpy(bp, F_SYMLINK(first), linkname_len);
 957                 } else {
 958                         if (munge_symlinks) {
 959                                 strlcpy(bp, SYMLINK_PREFIX, linkname_len);
 960                                 bp += SYMLINK_PREFIX_LEN;
 961                                 linkname_len -= SYMLINK_PREFIX_LEN;
 962                         }
 963 #ifdef ICONV_OPTION
 964                         if (ic_recv != (iconv_t)-1) {
 965                                 xbuf outbuf, inbuf;
 966
 967                                 alloc_len = linkname_len;
 968                                 linkname_len /= 2; /* (linkname_len-1) / 2 for odd values. */
 969
 970                                 /* Read the symlink name into the end of our double-sized
 971                                  * buffer and then convert it into the right spot. */
 972                                 INIT_XBUF(inbuf, bp + alloc_len - linkname_len,
 973                                           linkname_len - 1, (size_t)-1);
 974                                 read_sbuf(f, inbuf.buf, inbuf.len);
 975                                 INIT_XBUF(outbuf, bp, 0, alloc_len);
 976
 977                                 if (iconvbufs(ic_recv, &inbuf, &outbuf, 0) < 0) {
 978                                         io_error |= IOERR_GENERAL;
 979                                         rprintf(FERROR_XFER,
 980                                             "[%s] cannot convert symlink name for: %s (%s)\n",
 981                                             who_am_i(), full_fname(thisname), strerror(errno));
 982                                         bp = (char*)file->basename;
 983                                         *bp++ = '\0';
 984                                         outbuf.len = 0;
 985                                 }
 986                                 bp[outbuf.len] = '\0';
 987                         } else
 988 #endif
 989                                 read_sbuf(f, bp, linkname_len - 1);
 990                         if (sanitize_paths && !munge_symlinks && *bp)
 991                                 sanitize_path(bp, bp, "", lastdir_depth, SP_DEFAULT);
 992                 }
 993         }
 994 #endif
 995
 996 #ifdef SUPPORT_HARD_LINKS
 997         if (preserve_hard_links && xflags & XMIT_HLINKED) {
 998                 if (protocol_version >= 30) {
 999                         if (xflags & XMIT_HLINK_FIRST) {
1000                                 F_HL_GNUM(file) = flist->ndx_start + flist->used;
1001                         } else
1002                                 F_HL_GNUM(file) = first_hlink_ndx;
1003                 } else {
1004                         static int32 cnt = 0;
1005                         struct ht_int64_node *np;
1006                         int64 ino;
1007                         int32 ndx;
1008                         if (protocol_version < 26) {
1009                                 dev = read_int(f);
1010                                 ino = read_int(f);
1011                         } else {
1012                                 if (!(xflags & XMIT_SAME_DEV_pre30))
1013                                         dev = read_longint(f);
1014                                 ino = read_longint(f);
1015                         }
1016                         np = idev_find(dev, ino);
1017                         ndx = (int32)(long)np->data - 1;
1018                         if (ndx < 0) {
1019                                 ndx = cnt++;
1020                                 np->data = (void*)(long)cnt;
1021                         }
1022                         F_HL_GNUM(file) = ndx;
1023                 }
1024         }
1025 #endif
1026
1027         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
1028                 if (S_ISREG(mode))
1029                         bp = F_SUM(file);
1030                 else {
1031                         /* Prior to 28, we get a useless set of nulls. */
1032                         bp = tmp_sum;
1033                 }
1034                 if (first_hlink_ndx >= flist->ndx_start) {
1035                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
1036                         memcpy(bp, F_SUM(first), checksum_len);
1037                 } else
1038                         read_buf(f, bp, checksum_len);
1039         }
1040
1041 #ifdef SUPPORT_ACLS
1042         if (preserve_acls && !S_ISLNK(mode))
1043                 receive_acl(file, f);
1044 #endif
1045 #ifdef SUPPORT_XATTRS
1046         if (preserve_xattrs)
1047                 receive_xattr(file, f );
1048 #endif
1049
1050         if (S_ISREG(mode) || S_ISLNK(mode))
1051                 stats.total_size += file_length;
1052
1053         return file;
1054 }
1055
1056 /* Create a file_struct for a named file by reading its stat() information
1057  * and performing extensive checks against global options.
1058  *
1059  * Returns a pointer to the new file struct, or NULL if there was an error
1060  * or this file should be excluded.
1061  *
1062  * Note: Any error (here or in send_file_name) that results in the omission of
1063  * an existent source file from the file list should set
1064  * "io_error |= IOERR_GENERAL" to avoid deletion of the file from the
1065  * destination if --delete is on. */
1066 struct file_struct *make_file(const char *fname, struct file_list *flist,
1067                               STRUCT_STAT *stp, int flags, int filter_level)
1068 {
1069         static char *lastdir;
1070         static int lastdir_len = -1;
1071         struct file_struct *file;
1072         char thisname[MAXPATHLEN];
1073         char linkname[MAXPATHLEN];
1074         int alloc_len, basename_len, linkname_len;
1075         int extra_len = file_extra_cnt * EXTRA_LEN;
1076         const char *basename;
1077         alloc_pool_t *pool;
1078         STRUCT_STAT st;
1079         char *bp;
1080
1081         if (strlcpy(thisname, fname, sizeof thisname) >= sizeof thisname) {
1082                 io_error |= IOERR_GENERAL;
1083                 rprintf(FERROR_XFER, "skipping overly long name: %s\n", fname);
1084                 return NULL;
1085         }
1086         clean_fname(thisname, 0);
1087         if (sanitize_paths)
1088                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
1089
1090         if (stp && S_ISDIR(stp->st_mode)) {
1091                 st = *stp; /* Needed for "symlink/." with --relative. */
1092                 *linkname = '\0'; /* make IBM code checker happy */
1093         } else if (readlink_stat(thisname, &st, linkname) != 0) {
1094                 int save_errno = errno;
1095                 /* See if file is excluded before reporting an error. */
1096                 if (filter_level != NO_FILTERS
1097                  && (is_excluded(thisname, 0, filter_level)
1098                   || is_excluded(thisname, 1, filter_level))) {
1099                         if (ignore_perishable && save_errno != ENOENT)
1100                                 non_perishable_cnt++;
1101                         return NULL;
1102                 }
1103                 if (save_errno == ENOENT) {
1104 #ifdef SUPPORT_LINKS
1105                         /* When our options tell us to follow a symlink that
1106                          * points nowhere, tell the user about the symlink
1107                          * instead of giving a "vanished" message.  We only
1108                          * dereference a symlink if one of the --copy*links
1109                          * options was specified, so there's no need for the
1110                          * extra lstat() if one of these options isn't on. */
1111                         if ((copy_links || copy_unsafe_links || copy_dirlinks)
1112                          && x_lstat(thisname, &st, NULL) == 0
1113                          && S_ISLNK(st.st_mode)) {
1114                                 io_error |= IOERR_GENERAL;
1115                                 rprintf(FERROR_XFER, "symlink has no referent: %s\n",
1116                                         full_fname(thisname));
1117                         } else
1118 #endif
1119                         {
1120                                 enum logcode c = am_daemon && protocol_version < 28
1121                                                ? FERROR : FWARNING;
1122                                 io_error |= IOERR_VANISHED;
1123                                 rprintf(c, "file has vanished: %s\n",
1124                                         full_fname(thisname));
1125                         }
1126                 } else {
1127                         io_error |= IOERR_GENERAL;
1128                         rsyserr(FERROR_XFER, save_errno, "readlink %s failed",
1129                                 full_fname(thisname));
1130                 }
1131                 return NULL;
1132         }
1133
1134         if (filter_level == NO_FILTERS)
1135                 goto skip_filters;
1136
1137         if (S_ISDIR(st.st_mode)) {
1138                 if (!xfer_dirs) {
1139                         rprintf(FINFO, "skipping directory %s\n", thisname);
1140                         return NULL;
1141                 }
1142                 /* -x only affects dirs because we need to avoid recursing
1143                  * into a mount-point directory, not to avoid copying a
1144                  * symlinked file if -L (or similar) was specified. */
1145                 if (one_file_system && st.st_dev != filesystem_dev
1146                  && BITS_SETnUNSET(flags, FLAG_CONTENT_DIR, FLAG_TOP_DIR)) {
1147                         if (one_file_system > 1) {
1148                                 if (verbose > 1) {
1149                                         rprintf(FINFO,
1150                                             "[%s] skipping mount-point dir %s\n",
1151                                             who_am_i(), thisname);
1152                                 }
1153                                 return NULL;
1154                         }
1155                         flags |= FLAG_MOUNT_DIR;
1156                         flags &= ~FLAG_CONTENT_DIR;
1157                 }
1158         } else
1159                 flags &= ~FLAG_CONTENT_DIR;
1160
1161         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level)) {
1162                 if (ignore_perishable)
1163                         non_perishable_cnt++;
1164                 return NULL;
1165         }
1166
1167         if (lp_ignore_nonreadable(module_id)) {
1168 #ifdef SUPPORT_LINKS
1169                 if (!S_ISLNK(st.st_mode))
1170 #endif
1171                         if (access(thisname, R_OK) != 0)
1172                                 return NULL;
1173         }
1174
1175   skip_filters:
1176
1177         /* Only divert a directory in the main transfer. */
1178         if (flist) {
1179                 if (flist->prev && S_ISDIR(st.st_mode)
1180                  && flags & FLAG_DIVERT_DIRS) {
1181                         /* Room for parent/sibling/next-child info. */
1182                         extra_len += DIRNODE_EXTRA_CNT * EXTRA_LEN;
1183                         if (relative_paths)
1184                                 extra_len += PTR_EXTRA_CNT * EXTRA_LEN;
1185                         pool = dir_flist->file_pool;
1186                 } else
1187                         pool = flist->file_pool;
1188         } else {
1189 #ifdef SUPPORT_ACLS
1190                 /* Directories need an extra int32 for the default ACL. */
1191                 if (preserve_acls && S_ISDIR(st.st_mode))
1192                         extra_len += EXTRA_LEN;
1193 #endif
1194                 pool = NULL;
1195         }
1196
1197         if (verbose > 2) {
1198                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
1199                         who_am_i(), thisname, filter_level);
1200         }
1201
1202         if ((basename = strrchr(thisname, '/')) != NULL) {
1203                 int len = basename++ - thisname;
1204                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
1205                         lastdir = new_array(char, len + 1);
1206                         memcpy(lastdir, thisname, len);
1207                         lastdir[len] = '\0';
1208                         lastdir_len = len;
1209                 }
1210         } else
1211                 basename = thisname;
1212         basename_len = strlen(basename) + 1; /* count the '\0' */
1213
1214 #ifdef SUPPORT_LINKS
1215         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
1216 #else
1217         linkname_len = 0;
1218 #endif
1219
1220 #if SIZEOF_CAPITAL_OFF_T >= 8
1221         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
1222                 extra_len += EXTRA_LEN;
1223 #endif
1224
1225 #if EXTRA_ROUNDING > 0
1226         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
1227                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
1228 #endif
1229
1230         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
1231                   + linkname_len;
1232         if (pool)
1233                 bp = pool_alloc(pool, alloc_len, "make_file");
1234         else {
1235                 if (!(bp = new_array(char, alloc_len)))
1236                         out_of_memory("make_file");
1237         }
1238
1239         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
1240         bp += extra_len;
1241         file = (struct file_struct *)bp;
1242         bp += FILE_STRUCT_LEN;
1243
1244         memcpy(bp, basename, basename_len);
1245
1246 #ifdef SUPPORT_HARD_LINKS
1247         if (preserve_hard_links && flist && flist->prev) {
1248                 if (protocol_version >= 28
1249                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
1250                  : S_ISREG(st.st_mode)) {
1251                         tmp_dev = (int64)st.st_dev + 1;
1252                         tmp_ino = (int64)st.st_ino;
1253                 } else
1254                         tmp_dev = 0;
1255         }
1256 #endif
1257
1258 #ifdef HAVE_STRUCT_STAT_ST_RDEV
1259         if (IS_DEVICE(st.st_mode) || IS_SPECIAL(st.st_mode)) {
1260                 tmp_rdev = st.st_rdev;
1261                 st.st_size = 0;
1262         }
1263 #endif
1264
1265         file->flags = flags;
1266         file->modtime = st.st_mtime;
1267         file->len32 = (uint32)st.st_size;
1268 #if SIZEOF_CAPITAL_OFF_T >= 8
1269         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
1270                 file->flags |= FLAG_LENGTH64;
1271                 OPT_EXTRA(file, 0)->unum = (uint32)(st.st_size >> 32);
1272         }
1273 #endif
1274         file->mode = st.st_mode;
1275         if (uid_ndx) /* Check uid_ndx instead of preserve_uid for del support */
1276                 F_OWNER(file) = st.st_uid;
1277         if (gid_ndx) /* Check gid_ndx instead of preserve_gid for del support */
1278                 F_GROUP(file) = st.st_gid;
1279
1280         if (basename != thisname)
1281                 file->dirname = lastdir;
1282
1283 #ifdef SUPPORT_LINKS
1284         if (linkname_len)
1285                 memcpy(bp + basename_len, linkname, linkname_len);
1286 #endif
1287
1288         if (always_checksum && am_sender && S_ISREG(st.st_mode))
1289                 file_checksum(thisname, tmp_sum, st.st_size);
1290
1291         if (am_sender)
1292                 F_PATHNAME(file) = pathname;
1293         else if (!pool)
1294                 F_DEPTH(file) = extra_len / EXTRA_LEN;
1295
1296         /* This code is only used by the receiver when it is building
1297          * a list of files for a delete pass. */
1298         if (keep_dirlinks && linkname_len && flist) {
1299                 STRUCT_STAT st2;
1300                 int save_mode = file->mode;
1301                 file->mode = S_IFDIR; /* Find a directory with our name. */
1302                 if (flist_find(dir_flist, file) >= 0
1303                  && x_stat(thisname, &st2, NULL) == 0 && S_ISDIR(st2.st_mode)) {
1304                         file->modtime = st2.st_mtime;
1305                         file->len32 = 0;
1306                         file->mode = st2.st_mode;
1307                         if (uid_ndx)
1308                                 F_OWNER(file) = st2.st_uid;
1309                         if (gid_ndx)
1310                                 F_GROUP(file) = st2.st_gid;
1311                 } else
1312                         file->mode = save_mode;
1313         }
1314
1315         if (basename_len == 0+1) {
1316                 if (!pool)
1317                         unmake_file(file);
1318                 return NULL;
1319         }
1320
1321         if (unsort_ndx)
1322                 F_NDX(file) = dir_count;
1323
1324         return file;
1325 }
1326
1327 /* Only called for temporary file_struct entries created by make_file(). */
1328 void unmake_file(struct file_struct *file)
1329 {
1330         free(REQ_EXTRA(file, F_DEPTH(file)));
1331 }
1332
1333 static struct file_struct *send_file_name(int f, struct file_list *flist,
1334                                           const char *fname, STRUCT_STAT *stp,
1335                                           int flags, int filter_level)
1336 {
1337         struct file_struct *file;
1338
1339         file = make_file(fname, flist, stp, flags, filter_level);
1340         if (!file)
1341                 return NULL;
1342
1343         if (chmod_modes && !S_ISLNK(file->mode))
1344                 file->mode = tweak_mode(file->mode, chmod_modes);
1345
1346         if (f >= 0) {
1347                 char fbuf[MAXPATHLEN];
1348 #ifdef SUPPORT_LINKS
1349                 const char *symlink_name;
1350                 int symlink_len;
1351 #ifdef ICONV_OPTION
1352                 char symlink_buf[MAXPATHLEN];
1353 #endif
1354 #endif
1355 #if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
1356                 stat_x sx;
1357 #endif
1358
1359 #ifdef SUPPORT_LINKS
1360                 if (preserve_links && S_ISLNK(file->mode)) {
1361                         symlink_name = F_SYMLINK(file);
1362                         symlink_len = strlen(symlink_name);
1363                 } else {
1364                         symlink_name = NULL;
1365                         symlink_len = 0;
1366                 }
1367 #endif
1368
1369 #ifdef ICONV_OPTION
1370                 if (ic_send != (iconv_t)-1) {
1371                         xbuf outbuf, inbuf;
1372
1373                         INIT_CONST_XBUF(outbuf, fbuf);
1374
1375                         if (file->dirname) {
1376                                 INIT_XBUF_STRLEN(inbuf, (char*)file->dirname);
1377                                 outbuf.size -= 2; /* Reserve room for '/' & 1 more char. */
1378                                 if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0)
1379                                         goto convert_error;
1380                                 outbuf.size += 2;
1381                                 fbuf[outbuf.len++] = '/';
1382                         }
1383
1384                         INIT_XBUF_STRLEN(inbuf, (char*)file->basename);
1385                         if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0) {
1386                           convert_error:
1387                                 io_error |= IOERR_GENERAL;
1388                                 rprintf(FERROR_XFER,
1389                                     "[%s] cannot convert filename: %s (%s)\n",
1390                                     who_am_i(), f_name(file, fbuf), strerror(errno));
1391                                 return NULL;
1392                         }
1393                         fbuf[outbuf.len] = '\0';
1394
1395 #ifdef SUPPORT_LINKS
1396                         if (symlink_len) {
1397                                 INIT_XBUF(inbuf, (char*)symlink_name, symlink_len, (size_t)-1);
1398                                 INIT_CONST_XBUF(outbuf, symlink_buf);
1399                                 if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0) {
1400                                         io_error |= IOERR_GENERAL;
1401                                         f_name(file, fbuf);
1402                                         rprintf(FERROR_XFER,
1403                                             "[%s] cannot convert symlink name for: %s (%s)\n",
1404                                             who_am_i(), full_fname(fbuf), strerror(errno));
1405                                         return NULL;
1406                                 }
1407                                 symlink_buf[outbuf.len] = '\0';
1408
1409                                 symlink_name = symlink_buf;
1410                                 symlink_len = outbuf.len;
1411                         }
1412 #endif
1413                 } else
1414 #endif
1415                         f_name(file, fbuf);
1416
1417 #ifdef SUPPORT_ACLS
1418                 if (preserve_acls && !S_ISLNK(file->mode)) {
1419                         sx.st.st_mode = file->mode;
1420                         sx.acc_acl = sx.def_acl = NULL;
1421                         if (get_acl(fname, &sx) < 0) {
1422                                 io_error |= IOERR_GENERAL;
1423                                 return NULL;
1424                         }
1425                 }
1426 #endif
1427 #ifdef SUPPORT_XATTRS
1428                 if (preserve_xattrs) {
1429                         sx.xattr = NULL;
1430                         if (get_xattr(fname, &sx) < 0) {
1431                                 io_error |= IOERR_GENERAL;
1432                                 return NULL;
1433                         }
1434                 }
1435 #endif
1436
1437                 send_file_entry(f, fbuf, file,
1438 #ifdef SUPPORT_LINKS
1439                                 symlink_name, symlink_len,
1440 #endif
1441                                 flist->used, flist->ndx_start);
1442
1443 #ifdef SUPPORT_ACLS
1444                 if (preserve_acls && !S_ISLNK(file->mode)) {
1445                         send_acl(&sx, f);
1446                         free_acl(&sx);
1447                 }
1448 #endif
1449 #ifdef SUPPORT_XATTRS
1450                 if (preserve_xattrs) {
1451                         F_XATTR(file) = send_xattr(&sx, f);
1452                         free_xattr(&sx);
1453                 }
1454 #endif
1455         }
1456
1457         maybe_emit_filelist_progress(flist->used + flist_count_offset);
1458
1459         flist_expand(flist, 1);
1460         flist->files[flist->used++] = file;
1461
1462         return file;
1463 }
1464
1465 static void send_if_directory(int f, struct file_list *flist,
1466                               struct file_struct *file,
1467                               char *fbuf, unsigned int ol,
1468                               int flags)
1469 {
1470         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1471
1472         if (S_ISDIR(file->mode)
1473             && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) {
1474                 void *save_filters;
1475                 unsigned int len = strlen(fbuf);
1476                 if (len > 1 && fbuf[len-1] == '/')
1477                         fbuf[--len] = '\0';
1478                 if (len >= MAXPATHLEN - 1) {
1479                         io_error |= IOERR_GENERAL;
1480                         rprintf(FERROR_XFER, "skipping long-named directory: %s\n",
1481                                 full_fname(fbuf));
1482                         return;
1483                 }
1484                 save_filters = push_local_filters(fbuf, len);
1485                 send_directory(f, flist, fbuf, len, flags);
1486                 pop_local_filters(save_filters);
1487                 fbuf[ol] = '\0';
1488                 if (is_dot_dir)
1489                         fbuf[ol-1] = '.';
1490         }
1491 }
1492
1493 static int file_compare(const void *file1, const void *file2)
1494 {
1495         return f_name_cmp(*(struct file_struct **)file1,
1496                           *(struct file_struct **)file2);
1497 }
1498
1499 /* The guts of a merge-sort algorithm.  This was derived from the glibc
1500  * version, but I (Wayne) changed the merge code to do less copying and
1501  * to require only half the amount of temporary memory. */
1502 static void fsort_tmp(struct file_struct **fp, size_t num,
1503                       struct file_struct **tmp)
1504 {
1505         struct file_struct **f1, **f2, **t;
1506         size_t n1, n2;
1507
1508         n1 = num / 2;
1509         n2 = num - n1;
1510         f1 = fp;
1511         f2 = fp + n1;
1512
1513         if (n1 > 1)
1514                 fsort_tmp(f1, n1, tmp);
1515         if (n2 > 1)
1516                 fsort_tmp(f2, n2, tmp);
1517
1518         while (f_name_cmp(*f1, *f2) <= 0) {
1519                 if (!--n1)
1520                         return;
1521                 f1++;
1522         }
1523
1524         t = tmp;
1525         memcpy(t, f1, n1 * PTR_SIZE);
1526
1527         *f1++ = *f2++, n2--;
1528
1529         while (n1 > 0 && n2 > 0) {
1530                 if (f_name_cmp(*t, *f2) <= 0)
1531                         *f1++ = *t++, n1--;
1532                 else
1533                         *f1++ = *f2++, n2--;
1534         }
1535
1536         if (n1 > 0)
1537                 memcpy(f1, t, n1 * PTR_SIZE);
1538 }
1539
1540 /* This file-struct sorting routine makes sure that any identical names in
1541  * the file list stay in the same order as they were in the original list.
1542  * This is particularly vital in inc_recurse mode where we expect a sort
1543  * on the flist to match the exact order of a sort on the dir_flist. */
1544 static void fsort(struct file_struct **fp, size_t num)
1545 {
1546         if (num <= 1)
1547                 return;
1548
1549         if (use_qsort)
1550                 qsort(fp, num, PTR_SIZE, file_compare);
1551         else {
1552                 struct file_struct **tmp = new_array(struct file_struct *,
1553                                                      (num+1) / 2);
1554                 fsort_tmp(fp, num, tmp);
1555                 free(tmp);
1556         }
1557 }
1558
1559 /* We take an entire set of sibling dirs from the sorted flist and link them
1560  * into the tree, setting the appropriate parent/child/sibling pointers. */
1561 static void add_dirs_to_tree(int parent_ndx, struct file_list *from_flist,
1562                              int dir_cnt)
1563 {
1564         int i;
1565         int32 *dp = NULL;
1566         int32 *parent_dp = parent_ndx < 0 ? NULL
1567                          : F_DIR_NODE_P(dir_flist->sorted[parent_ndx]);
1568
1569         flist_expand(dir_flist, dir_cnt);
1570         dir_flist->sorted = dir_flist->files;
1571
1572         for (i = 0; dir_cnt; i++) {
1573                 struct file_struct *file = from_flist->sorted[i];
1574
1575                 if (!S_ISDIR(file->mode))
1576                         continue;
1577
1578                 dir_flist->files[dir_flist->used++] = file;
1579                 dir_cnt--;
1580
1581                 if (file->basename[0] == '.' && file->basename[1] == '\0')
1582                         continue;
1583
1584                 if (dp)
1585                         DIR_NEXT_SIBLING(dp) = dir_flist->used - 1;
1586                 else if (parent_dp)
1587                         DIR_FIRST_CHILD(parent_dp) = dir_flist->used - 1;
1588                 else
1589                         send_dir_ndx = dir_flist->used - 1;
1590
1591                 dp = F_DIR_NODE_P(file);
1592                 DIR_PARENT(dp) = parent_ndx;
1593                 DIR_FIRST_CHILD(dp) = -1;
1594         }
1595         if (dp)
1596                 DIR_NEXT_SIBLING(dp) = -1;
1597 }
1598
1599 /* This function is normally called by the sender, but the receiving side also
1600  * calls it from get_dirlist() with f set to -1 so that we just construct the
1601  * file list in memory without sending it over the wire.  Also, get_dirlist()
1602  * might call this with f set to -2, which also indicates that local filter
1603  * rules should be ignored. */
1604 static void send_directory(int f, struct file_list *flist, char *fbuf, int len,
1605                            int flags)
1606 {
1607         struct dirent *di;
1608         unsigned remainder;
1609         char *p;
1610         DIR *d;
1611         int divert_dirs = (flags & FLAG_DIVERT_DIRS) != 0;
1612         int start = flist->used;
1613         int filter_level = f == -2 ? SERVER_FILTERS : ALL_FILTERS;
1614
1615         assert(flist != NULL);
1616
1617         if (!(d = opendir(fbuf))) {
1618                 io_error |= IOERR_GENERAL;
1619                 rsyserr(FERROR_XFER, errno, "opendir %s failed", full_fname(fbuf));
1620                 return;
1621         }
1622
1623         p = fbuf + len;
1624         if (len != 1 || *fbuf != '/')
1625                 *p++ = '/';
1626         *p = '\0';
1627         remainder = MAXPATHLEN - (p - fbuf);
1628
1629         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1630                 char *dname = d_name(di);
1631                 if (dname[0] == '.' && (dname[1] == '\0'
1632                     || (dname[1] == '.' && dname[2] == '\0')))
1633                         continue;
1634                 if (strlcpy(p, dname, remainder) >= remainder) {
1635                         io_error |= IOERR_GENERAL;
1636                         rprintf(FERROR_XFER,
1637                                 "cannot send long-named file %s\n",
1638                                 full_fname(fbuf));
1639                         continue;
1640                 }
1641                 if (dname[0] == '\0') {
1642                         io_error |= IOERR_GENERAL;
1643                         rprintf(FERROR_XFER,
1644                                 "cannot send file with empty name in %s\n",
1645                                 full_fname(fbuf));
1646                         continue;
1647                 }
1648
1649                 send_file_name(f, flist, fbuf, NULL, flags, filter_level);
1650         }
1651
1652         fbuf[len] = '\0';
1653
1654         if (errno) {
1655                 io_error |= IOERR_GENERAL;
1656                 rsyserr(FERROR_XFER, errno, "readdir(%s)", full_fname(fbuf));
1657         }
1658
1659         closedir(d);
1660
1661         if (f >= 0 && recurse && !divert_dirs) {
1662                 int i, end = flist->used - 1;
1663                 /* send_if_directory() bumps flist->used, so use "end". */
1664                 for (i = start; i <= end; i++)
1665                         send_if_directory(f, flist, flist->files[i], fbuf, len, flags);
1666         }
1667 }
1668
1669 static void send_implied_dirs(int f, struct file_list *flist, char *fname,
1670                               char *start, char *limit, int flags, char name_type)
1671 {
1672         static char lastpath[MAXPATHLEN] = "";
1673         static int lastpath_len = 0;
1674         static struct file_struct *lastpath_struct = NULL;
1675         struct file_struct *file;
1676         item_list *relname_list;
1677         relnamecache **rnpp;
1678         int len, need_new_dir, depth = 0;
1679         struct filter_list_struct save_filter_list = filter_list;
1680
1681         flags = (flags | FLAG_IMPLIED_DIR) & ~(FLAG_TOP_DIR | FLAG_CONTENT_DIR);
1682         filter_list.head = filter_list.tail = NULL; /* Don't filter implied dirs. */
1683
1684         if (inc_recurse) {
1685                 if (lastpath_struct && F_PATHNAME(lastpath_struct) == pathname
1686                  && lastpath_len == limit - fname
1687                  && strncmp(lastpath, fname, lastpath_len) == 0)
1688                         need_new_dir = 0;
1689                 else
1690                         need_new_dir = 1;
1691         } else {
1692                 char *tp = fname, *lp = lastpath;
1693                 /* Skip any initial directories in our path that we
1694                  * have in common with lastpath. */
1695                 assert(start == fname);
1696                 for ( ; ; tp++, lp++) {
1697                         if (tp == limit) {
1698                                 if (*lp == '/' || *lp == '\0')
1699                                         goto done;
1700                                 break;
1701                         }
1702                         if (*lp != *tp)
1703                                 break;
1704                         if (*tp == '/') {
1705                                 start = tp;
1706                                 depth++;
1707                         }
1708                 }
1709                 need_new_dir = 1;
1710         }
1711
1712         if (need_new_dir) {
1713                 int save_copy_links = copy_links;
1714                 int save_xfer_dirs = xfer_dirs;
1715                 char *slash;
1716
1717                 copy_links = xfer_dirs = 1;
1718
1719                 *limit = '\0';
1720
1721                 for (slash = start; (slash = strchr(slash+1, '/')) != NULL; ) {
1722                         *slash = '\0';
1723                         file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1724                         depth++;
1725                         if (!inc_recurse && file && S_ISDIR(file->mode))
1726                                 change_local_filter_dir(fname, strlen(fname), depth);
1727                         *slash = '/';
1728                 }
1729
1730                 file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1731                 if (inc_recurse) {
1732                         if (file && !S_ISDIR(file->mode))
1733                                 file = NULL;
1734                         lastpath_struct = file;
1735                 } else if (file && S_ISDIR(file->mode))
1736                         change_local_filter_dir(fname, strlen(fname), ++depth);
1737
1738                 strlcpy(lastpath, fname, sizeof lastpath);
1739                 lastpath_len = limit - fname;
1740
1741                 *limit = '/';
1742
1743                 copy_links = save_copy_links;
1744                 xfer_dirs = save_xfer_dirs;
1745
1746                 if (!inc_recurse)
1747                         goto done;
1748         }
1749
1750         if (!lastpath_struct)
1751                 goto done; /* dir must have vanished */
1752
1753         len = strlen(limit+1);
1754         memcpy(&relname_list, F_DIR_RELNAMES_P(lastpath_struct), sizeof relname_list);
1755         if (!relname_list) {
1756                 if (!(relname_list = new0(item_list)))
1757                         out_of_memory("send_implied_dirs");
1758                 memcpy(F_DIR_RELNAMES_P(lastpath_struct), &relname_list, sizeof relname_list);
1759         }
1760         rnpp = EXPAND_ITEM_LIST(relname_list, relnamecache *, 32);
1761         if (!(*rnpp = (relnamecache*)new_array(char, sizeof (relnamecache) + len)))
1762                 out_of_memory("send_implied_dirs");
1763         (*rnpp)->name_type = name_type;
1764         strlcpy((*rnpp)->fname, limit+1, len + 1);
1765
1766 done:
1767         filter_list = save_filter_list;
1768 }
1769
1770 static void send1extra(int f, struct file_struct *file, struct file_list *flist)
1771 {
1772         char fbuf[MAXPATHLEN];
1773         item_list *relname_list;
1774         int len, dlen, flags = FLAG_DIVERT_DIRS | FLAG_CONTENT_DIR;
1775         size_t j;
1776
1777         f_name(file, fbuf);
1778         dlen = strlen(fbuf);
1779
1780         if (!change_pathname(file, NULL, 0))
1781                 exit_cleanup(RERR_FILESELECT);
1782
1783         change_local_filter_dir(fbuf, dlen, send_dir_depth);
1784
1785         if (file->flags & FLAG_CONTENT_DIR) {
1786                 if (one_file_system) {
1787                         STRUCT_STAT st;
1788                         if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1789                                 io_error |= IOERR_GENERAL;
1790                                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1791                                         full_fname(fbuf));
1792                                 return;
1793                         }
1794                         filesystem_dev = st.st_dev;
1795                 }
1796                 send_directory(f, flist, fbuf, dlen, flags);
1797         }
1798
1799         if (!relative_paths)
1800                 return;
1801
1802         memcpy(&relname_list, F_DIR_RELNAMES_P(file), sizeof relname_list);
1803         if (!relname_list)
1804                 return;
1805
1806         for (j = 0; j < relname_list->count; j++) {
1807                 char *slash;
1808                 relnamecache *rnp = ((relnamecache**)relname_list->items)[j];
1809                 char name_type = rnp->name_type;
1810
1811                 fbuf[dlen] = '/';
1812                 len = strlcpy(fbuf + dlen + 1, rnp->fname, sizeof fbuf - dlen - 1);
1813                 free(rnp);
1814                 if (len >= (int)sizeof fbuf)
1815                         continue; /* Impossible... */
1816
1817                 slash = strchr(fbuf+dlen+1, '/');
1818                 if (slash) {
1819                         send_implied_dirs(f, flist, fbuf, fbuf+dlen+1, slash, flags, name_type);
1820                         continue;
1821                 }
1822
1823                 if (name_type != NORMAL_NAME) {
1824                         STRUCT_STAT st;
1825                         if (link_stat(fbuf, &st, 1) != 0) {
1826                                 io_error |= IOERR_GENERAL;
1827                                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1828                                         full_fname(fbuf));
1829                                 continue;
1830                         }
1831                         send_file_name(f, flist, fbuf, &st, FLAG_TOP_DIR | flags, ALL_FILTERS);
1832                 } else
1833                         send_file_name(f, flist, fbuf, NULL, FLAG_TOP_DIR | flags, ALL_FILTERS);
1834         }
1835
1836         free(relname_list);
1837 }
1838
1839 void send_extra_file_list(int f, int at_least)
1840 {
1841         struct file_list *flist;
1842         int64 start_write;
1843         uint16 prev_flags;
1844         int old_cnt, save_io_error = io_error;
1845
1846         if (flist_eof)
1847                 return;
1848
1849         /* Keep sending data until we have the requested number of
1850          * files in the upcoming file-lists. */
1851         old_cnt = cur_flist->used;
1852         for (flist = first_flist; flist != cur_flist; flist = flist->next)
1853                 old_cnt += flist->used;
1854         while (file_total - old_cnt < at_least) {
1855                 struct file_struct *file = dir_flist->sorted[send_dir_ndx];
1856                 int dir_ndx, dstart = dir_count;
1857                 const char *pathname = F_PATHNAME(file);
1858                 int32 *dp;
1859
1860                 flist = flist_new(0, "send_extra_file_list");
1861                 start_write = stats.total_written;
1862
1863                 if (unsort_ndx)
1864                         dir_ndx = F_NDX(file);
1865                 else
1866                         dir_ndx = send_dir_ndx;
1867                 write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
1868                 flist->parent_ndx = dir_ndx;
1869
1870                 send1extra(f, file, flist);
1871                 prev_flags = file->flags;
1872                 dp = F_DIR_NODE_P(file);
1873
1874                 /* If there are any duplicate directory names that follow, we
1875                  * send all the dirs together in one file-list.  The dir_flist
1876                  * tree links all the child subdirs onto the last dup dir. */
1877                 while ((dir_ndx = DIR_NEXT_SIBLING(dp)) >= 0
1878                     && dir_flist->sorted[dir_ndx]->flags & FLAG_DUPLICATE) {
1879                         send_dir_ndx = dir_ndx;
1880                         file = dir_flist->sorted[dir_ndx];
1881                         /* Try to avoid some duplicate scanning of identical dirs. */
1882                         if (F_PATHNAME(file) == pathname && prev_flags & FLAG_CONTENT_DIR)
1883                                 file->flags &= ~FLAG_CONTENT_DIR;
1884                         send1extra(f, file, flist);
1885                         prev_flags = file->flags;
1886                         dp = F_DIR_NODE_P(file);
1887                 }
1888
1889                 write_byte(f, 0);
1890
1891                 if (need_unsorted_flist) {
1892                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
1893                                 out_of_memory("send_extra_file_list");
1894                         memcpy(flist->sorted, flist->files,
1895                                flist->used * sizeof (struct file_struct*));
1896                 } else
1897                         flist->sorted = flist->files;
1898
1899                 flist_sort_and_clean(flist, 0);
1900
1901                 add_dirs_to_tree(send_dir_ndx, flist, dir_count - dstart);
1902                 flist_done_allocating(flist);
1903
1904                 file_total += flist->used;
1905                 stats.flist_size += stats.total_written - start_write;
1906                 stats.num_files += flist->used;
1907                 if (verbose > 3)
1908                         output_flist(flist);
1909
1910                 if (DIR_FIRST_CHILD(dp) >= 0) {
1911                         send_dir_ndx = DIR_FIRST_CHILD(dp);
1912                         send_dir_depth++;
1913                 } else {
1914                         while (DIR_NEXT_SIBLING(dp) < 0) {
1915                                 if ((send_dir_ndx = DIR_PARENT(dp)) < 0) {
1916                                         write_ndx(f, NDX_FLIST_EOF);
1917                                         flist_eof = 1;
1918                                         change_local_filter_dir(NULL, 0, 0);
1919                                         goto finish;
1920                                 }
1921                                 send_dir_depth--;
1922                                 file = dir_flist->sorted[send_dir_ndx];
1923                                 dp = F_DIR_NODE_P(file);
1924                         }
1925                         send_dir_ndx = DIR_NEXT_SIBLING(dp);
1926                 }
1927         }
1928
1929   finish:
1930         if (io_error != save_io_error && !ignore_errors)
1931                 send_msg_int(MSG_IO_ERROR, io_error);
1932 }
1933
1934 struct file_list *send_file_list(int f, int argc, char *argv[])
1935 {
1936         static const char *lastdir;
1937         static int lastdir_len = -1;
1938         int len, dirlen;
1939         STRUCT_STAT st;
1940         char *p, *dir;
1941         struct file_list *flist;
1942         struct timeval start_tv, end_tv;
1943         int64 start_write;
1944         int use_ff_fd = 0;
1945         int disable_buffering;
1946         int flags = recurse ? FLAG_CONTENT_DIR : 0;
1947         int reading_remotely = filesfrom_host != NULL;
1948         int rl_flags = (reading_remotely ? 0 : RL_DUMP_COMMENTS)
1949 #ifdef ICONV_OPTION
1950                      | (filesfrom_convert ? RL_CONVERT : 0)
1951 #endif
1952                      | (eol_nulls || reading_remotely ? RL_EOL_NULLS : 0);
1953         int implied_dot_dir = 0;
1954
1955         rprintf(FLOG, "building file list\n");
1956         if (show_filelist_p())
1957                 start_filelist_progress("building file list");
1958         else if (inc_recurse && verbose && !am_server)
1959                 rprintf(FCLIENT, "sending incremental file list\n");
1960
1961         start_write = stats.total_written;
1962         gettimeofday(&start_tv, NULL);
1963
1964         if (!orig_dir)
1965                 orig_dir = strdup(curr_dir);
1966
1967         if (relative_paths && protocol_version >= 30)
1968                 implied_dirs = 1; /* We send flagged implied dirs */
1969
1970 #ifdef SUPPORT_HARD_LINKS
1971         if (preserve_hard_links && protocol_version >= 30 && !cur_flist)
1972                 init_hard_links();
1973 #endif
1974
1975         flist = cur_flist = flist_new(0, "send_file_list");
1976         if (inc_recurse) {
1977                 dir_flist = flist_new(FLIST_TEMP, "send_file_list");
1978                 flags |= FLAG_DIVERT_DIRS;
1979         } else
1980                 dir_flist = cur_flist;
1981
1982         disable_buffering = io_start_buffering_out(f);
1983         if (filesfrom_fd >= 0) {
1984                 if (argv[0] && !change_dir(argv[0], CD_NORMAL)) {
1985                         rsyserr(FERROR_XFER, errno, "change_dir %s failed",
1986                                 full_fname(argv[0]));
1987                         exit_cleanup(RERR_FILESELECT);
1988                 }
1989                 use_ff_fd = 1;
1990         }
1991
1992         while (1) {
1993                 char fbuf[MAXPATHLEN], *fn, name_type;
1994
1995                 if (use_ff_fd) {
1996                         if (read_line(filesfrom_fd, fbuf, sizeof fbuf, rl_flags) == 0)
1997                                 break;
1998                         sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
1999                 } else {
2000                         if (argc-- == 0)
2001                                 break;
2002                         strlcpy(fbuf, *argv++, MAXPATHLEN);
2003                         if (sanitize_paths)
2004                                 sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
2005                 }
2006
2007                 len = strlen(fbuf);
2008                 if (relative_paths) {
2009                         /* We clean up fbuf below. */
2010                         name_type = NORMAL_NAME;
2011                 } else if (!len || fbuf[len - 1] == '/') {
2012                         if (len == 2 && fbuf[0] == '.') {
2013                                 /* Turn "./" into just "." rather than "./." */
2014                                 fbuf[--len] = '\0';
2015                         } else {
2016                                 if (len + 1 >= MAXPATHLEN)
2017                                         overflow_exit("send_file_list");
2018                                 fbuf[len++] = '.';
2019                                 fbuf[len] = '\0';
2020                         }
2021                         name_type = DOTDIR_NAME;
2022                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
2023                     && (len == 2 || fbuf[len-3] == '/')) {
2024                         if (len + 2 >= MAXPATHLEN)
2025                                 overflow_exit("send_file_list");
2026                         fbuf[len++] = '/';
2027                         fbuf[len++] = '.';
2028                         fbuf[len] = '\0';
2029                         name_type = DOTDIR_NAME;
2030                 } else if (fbuf[len-1] == '.' && (len == 1 || fbuf[len-2] == '/'))
2031                         name_type = DOTDIR_NAME;
2032                 else
2033                         name_type = NORMAL_NAME;
2034
2035                 dir = NULL;
2036
2037                 if (!relative_paths) {
2038                         p = strrchr(fbuf, '/');
2039                         if (p) {
2040                                 *p = '\0';
2041                                 if (p == fbuf)
2042                                         dir = "/";
2043                                 else
2044                                         dir = fbuf;
2045                                 len -= p - fbuf + 1;
2046                                 fn = p + 1;
2047                         } else
2048                                 fn = fbuf;
2049                 } else {
2050                         if ((p = strstr(fbuf, "/./")) != NULL) {
2051                                 *p = '\0';
2052                                 if (p == fbuf)
2053                                         dir = "/";
2054                                 else {
2055                                         dir = fbuf;
2056                                         clean_fname(dir, 0);
2057                                 }
2058                                 fn = p + 3;
2059                                 while (*fn == '/')
2060                                         fn++;
2061                                 if (!*fn)
2062                                         *--fn = '\0'; /* ensure room for '.' */
2063                         } else
2064                                 fn = fbuf;
2065                         /* A leading ./ can be used in relative mode to affect
2066                          * the dest dir without its name being in the path. */
2067                         if (*fn == '.' && fn[1] == '/' && !implied_dot_dir) {
2068                                 send_file_name(f, flist, ".", NULL,
2069                                     (flags | FLAG_IMPLIED_DIR) & ~FLAG_CONTENT_DIR,
2070                                     ALL_FILTERS);
2071                                 implied_dot_dir = 1;
2072                         }
2073                         len = clean_fname(fn, CFN_KEEP_TRAILING_SLASH
2074                                             | CFN_DROP_TRAILING_DOT_DIR);
2075                         if (len == 1) {
2076                                 if (fn[0] == '/') {
2077                                         fn = "/.";
2078                                         len = 2;
2079                                         name_type = DOTDIR_NAME;
2080                                 } else if (fn[0] == '.')
2081                                         name_type = DOTDIR_NAME;
2082                         } else if (fn[len-1] == '/') {
2083                                 fn[--len] = '\0';
2084                                 if (len == 1 && *fn == '.')
2085                                         name_type = DOTDIR_NAME;
2086                                 else
2087                                         name_type = SLASH_ENDING_NAME;
2088                         }
2089                         /* Reject a ".." dir in the active part of the path. */
2090                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
2091                                 if ((p[2] == '/' || p[2] == '\0')
2092                                  && (p == fn || p[-1] == '/')) {
2093                                         rprintf(FERROR,
2094                                             "found \"..\" dir in relative path: %s\n",
2095                                             fn);
2096                                         exit_cleanup(RERR_SYNTAX);
2097                                 }
2098                         }
2099                 }
2100
2101                 if (!*fn) {
2102                         len = 1;
2103                         fn = ".";
2104                         name_type = DOTDIR_NAME;
2105                 }
2106
2107                 dirlen = dir ? strlen(dir) : 0;
2108                 if (dirlen != lastdir_len || memcmp(lastdir, dir, dirlen) != 0) {
2109                         if (!change_pathname(NULL, dir, -dirlen))
2110                                 continue;
2111                         lastdir = pathname;
2112                         lastdir_len = pathname_len;
2113                 } else if (!change_pathname(NULL, lastdir, lastdir_len))
2114                         continue;
2115
2116                 if (fn != fbuf)
2117                         memmove(fbuf, fn, len + 1);
2118
2119                 if (link_stat(fbuf, &st, copy_dirlinks || name_type != NORMAL_NAME) != 0
2120                  || (name_type != DOTDIR_NAME && is_daemon_excluded(fbuf, S_ISDIR(st.st_mode)))
2121                  || (relative_paths && path_is_daemon_excluded(fbuf, 1))) {
2122                         io_error |= IOERR_GENERAL;
2123                         rsyserr(FERROR_XFER, errno, "link_stat %s failed",
2124                                 full_fname(fbuf));
2125                         continue;
2126                 }
2127
2128                 /* A dot-dir should not be excluded! */
2129                 if (name_type != DOTDIR_NAME
2130                  && is_excluded(fbuf, S_ISDIR(st.st_mode) != 0, ALL_FILTERS))
2131                         continue;
2132
2133                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
2134                         rprintf(FINFO, "skipping directory %s\n", fbuf);
2135                         continue;
2136                 }
2137
2138                 if (inc_recurse && relative_paths && *fbuf) {
2139                         if ((p = strchr(fbuf+1, '/')) != NULL) {
2140                                 if (p - fbuf == 1 && *fbuf == '.') {
2141                                         if ((fn = strchr(p+1, '/')) != NULL)
2142                                                 p = fn;
2143                                 } else
2144                                         fn = p;
2145                                 send_implied_dirs(f, flist, fbuf, fbuf, p, flags, name_type);
2146                                 if (fn == p)
2147                                         continue;
2148                         }
2149                 } else if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
2150                         /* Send the implied directories at the start of the
2151                          * source spec, so we get their permissions right. */
2152                         send_implied_dirs(f, flist, fbuf, fbuf, p, flags, 0);
2153                 }
2154
2155                 if (one_file_system)
2156                         filesystem_dev = st.st_dev;
2157
2158                 if (recurse || (xfer_dirs && name_type != NORMAL_NAME)) {
2159                         struct file_struct *file;
2160                         file = send_file_name(f, flist, fbuf, &st,
2161                                               FLAG_TOP_DIR | FLAG_CONTENT_DIR | flags,
2162                                               NO_FILTERS);
2163                         if (!file)
2164                                 continue;
2165                         if (inc_recurse) {
2166                                 if (name_type == DOTDIR_NAME) {
2167                                         if (send_dir_depth < 0) {
2168                                                 send_dir_depth = 0;
2169                                                 change_local_filter_dir(fbuf, len, send_dir_depth);
2170                                         }
2171                                         send_directory(f, flist, fbuf, len, flags);
2172                                 }
2173                         } else
2174                                 send_if_directory(f, flist, file, fbuf, len, flags);
2175                 } else
2176                         send_file_name(f, flist, fbuf, &st, flags, NO_FILTERS);
2177         }
2178
2179         gettimeofday(&end_tv, NULL);
2180         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2181                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2182         if (stats.flist_buildtime == 0)
2183                 stats.flist_buildtime = 1;
2184         start_tv = end_tv;
2185
2186         write_byte(f, 0); /* Indicate end of file list */
2187
2188 #ifdef SUPPORT_HARD_LINKS
2189         if (preserve_hard_links && protocol_version >= 30 && !inc_recurse)
2190                 idev_destroy();
2191 #endif
2192
2193         if (show_filelist_p())
2194                 finish_filelist_progress(flist);
2195
2196         gettimeofday(&end_tv, NULL);
2197         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2198                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2199
2200         /* When converting names, both sides keep an unsorted file-list array
2201          * because the names will differ on the sending and receiving sides
2202          * (both sides will use the unsorted index number for each item). */
2203
2204         /* Sort the list without removing any duplicates.  This allows the
2205          * receiving side to ask for whatever name it kept.  For incremental
2206          * recursion mode, the sender marks duplicate dirs so that it can
2207          * send them together in a single file-list. */
2208         if (need_unsorted_flist) {
2209                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2210                         out_of_memory("send_file_list");
2211                 memcpy(flist->sorted, flist->files,
2212                        flist->used * sizeof (struct file_struct*));
2213         } else
2214                 flist->sorted = flist->files;
2215         flist_sort_and_clean(flist, 0);
2216         file_total += flist->used;
2217
2218         if (numeric_ids <= 0 && !inc_recurse)
2219                 send_id_list(f);
2220
2221         /* send the io_error flag */
2222         if (protocol_version < 30)
2223                 write_int(f, ignore_errors ? 0 : io_error);
2224         else if (io_error && !ignore_errors)
2225                 send_msg_int(MSG_IO_ERROR, io_error);
2226
2227         if (disable_buffering)
2228                 io_end_buffering_out();
2229
2230         stats.flist_size = stats.total_written - start_write;
2231         stats.num_files = flist->used;
2232
2233         if (verbose > 3)
2234                 output_flist(flist);
2235
2236         if (verbose > 2)
2237                 rprintf(FINFO, "send_file_list done\n");
2238
2239         if (inc_recurse) {
2240                 send_dir_depth = 1;
2241                 add_dirs_to_tree(-1, flist, dir_count);
2242                 if (!file_total || strcmp(flist->sorted[flist->low]->basename, ".") != 0)
2243                         flist->parent_ndx = -1;
2244                 flist_done_allocating(flist);
2245                 if (send_dir_ndx < 0) {
2246                         write_ndx(f, NDX_FLIST_EOF);
2247                         flist_eof = 1;
2248                 }
2249                 else if (file_total == 1) {
2250                         /* If we're creating incremental file-lists and there
2251                          * was just 1 item in the first file-list, send 1 more
2252                          * file-list to check if this is a 1-file xfer. */
2253                         send_extra_file_list(f, 1);
2254                 }
2255         }
2256
2257         return flist;
2258 }
2259
2260 struct file_list *recv_file_list(int f)
2261 {
2262         struct file_list *flist;
2263         int dstart, flags;
2264         int64 start_read;
2265
2266         if (!first_flist)
2267                 rprintf(FLOG, "receiving file list\n");
2268         if (show_filelist_p())
2269                 start_filelist_progress("receiving file list");
2270         else if (inc_recurse && verbose && !am_server && !first_flist)
2271                 rprintf(FCLIENT, "receiving incremental file list\n");
2272
2273         start_read = stats.total_read;
2274
2275 #ifdef SUPPORT_HARD_LINKS
2276         if (preserve_hard_links && !first_flist)
2277                 init_hard_links();
2278 #endif
2279
2280         flist = flist_new(0, "recv_file_list");
2281
2282         if (inc_recurse) {
2283                 if (flist->ndx_start == 1)
2284                         dir_flist = flist_new(FLIST_TEMP, "recv_file_list");
2285                 dstart = dir_flist->used;
2286         } else {
2287                 dir_flist = flist;
2288                 dstart = 0;
2289         }
2290
2291         while ((flags = read_byte(f)) != 0) {
2292                 struct file_struct *file;
2293
2294                 flist_expand(flist, 1);
2295
2296                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
2297                         flags |= read_byte(f) << 8;
2298                 file = recv_file_entry(flist, flags, f);
2299
2300                 if (inc_recurse && S_ISDIR(file->mode)) {
2301                         flist_expand(dir_flist, 1);
2302                         dir_flist->files[dir_flist->used++] = file;
2303                 }
2304
2305                 flist->files[flist->used++] = file;
2306
2307                 maybe_emit_filelist_progress(flist->used);
2308
2309                 if (verbose > 2) {
2310                         char *name = f_name(file, NULL);
2311                         rprintf(FINFO, "recv_file_name(%s)\n", NS(name));
2312                 }
2313         }
2314         file_total += flist->used;
2315
2316         if (verbose > 2)
2317                 rprintf(FINFO, "received %d names\n", flist->used);
2318
2319         if (show_filelist_p())
2320                 finish_filelist_progress(flist);
2321
2322         if (need_unsorted_flist) {
2323                 /* Create an extra array of index pointers that we can sort for
2324                  * the generator's use (for wading through the files in sorted
2325                  * order and for calling flist_find()).  We keep the "files"
2326                  * list unsorted for our exchange of index numbers with the
2327                  * other side (since their names may not sort the same). */
2328                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2329                         out_of_memory("recv_file_list");
2330                 memcpy(flist->sorted, flist->files,
2331                        flist->used * sizeof (struct file_struct*));
2332                 if (inc_recurse && dir_flist->used > dstart) {
2333                         static int dir_flist_malloced = 0;
2334                         if (dir_flist_malloced < dir_flist->malloced) {
2335                                 dir_flist->sorted = realloc_array(dir_flist->sorted,
2336                                                         struct file_struct *,
2337                                                         dir_flist->malloced);
2338                                 dir_flist_malloced = dir_flist->malloced;
2339                         }
2340                         memcpy(dir_flist->sorted + dstart, dir_flist->files + dstart,
2341                                (dir_flist->used - dstart) * sizeof (struct file_struct*));
2342                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2343                 }
2344         } else {
2345                 flist->sorted = flist->files;
2346                 if (inc_recurse && dir_flist->used > dstart) {
2347                         dir_flist->sorted = dir_flist->files;
2348                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2349                 }
2350         }
2351
2352         if (inc_recurse)
2353                 flist_done_allocating(flist);
2354         else if (f >= 0)
2355                 recv_id_list(f, flist);
2356
2357         flist_sort_and_clean(flist, relative_paths);
2358
2359         if (protocol_version < 30) {
2360                 /* Recv the io_error flag */
2361                 if (ignore_errors)
2362                         read_int(f);
2363                 else
2364                         io_error |= read_int(f);
2365         } else if (inc_recurse && flist->ndx_start == 1) {
2366                 if (!file_total || strcmp(flist->sorted[flist->low]->basename, ".") != 0)
2367                         flist->parent_ndx = -1;
2368         }
2369
2370         if (verbose > 3)
2371                 output_flist(flist);
2372
2373         if (verbose > 2)
2374                 rprintf(FINFO, "recv_file_list done\n");
2375
2376         stats.flist_size += stats.total_read - start_read;
2377         stats.num_files += flist->used;
2378
2379         return flist;
2380 }
2381
2382 /* This is only used once by the receiver if the very first file-list
2383  * has exactly one item in it. */
2384 void recv_additional_file_list(int f)
2385 {
2386         struct file_list *flist;
2387         int ndx = read_ndx(f);
2388         if (ndx == NDX_FLIST_EOF) {
2389                 flist_eof = 1;
2390                 change_local_filter_dir(NULL, 0, 0);
2391         } else {
2392                 ndx = NDX_FLIST_OFFSET - ndx;
2393                 if (ndx < 0 || ndx >= dir_flist->used) {
2394                         ndx = NDX_FLIST_OFFSET - ndx;
2395                         rprintf(FERROR,
2396                                 "[%s] Invalid dir index: %d (%d - %d)\n",
2397                                 who_am_i(), ndx, NDX_FLIST_OFFSET,
2398                                 NDX_FLIST_OFFSET - dir_flist->used + 1);
2399                         exit_cleanup(RERR_PROTOCOL);
2400                 }
2401                 if (verbose > 3) {
2402                         rprintf(FINFO, "[%s] receiving flist for dir %d\n",
2403                                 who_am_i(), ndx);
2404                 }
2405                 flist = recv_file_list(f);
2406                 flist->parent_ndx = ndx;
2407         }
2408 }
2409
2410 /* Search for an identically-named item in the file list.  Note that the
2411  * items must agree in their directory-ness, or no match is returned. */
2412 int flist_find(struct file_list *flist, struct file_struct *f)
2413 {
2414         int low = flist->low, high = flist->high;
2415         int diff, mid, mid_up;
2416
2417         while (low <= high) {
2418                 mid = (low + high) / 2;
2419                 if (F_IS_ACTIVE(flist->sorted[mid]))
2420                         mid_up = mid;
2421                 else {
2422                         /* Scan for the next non-empty entry using the cached
2423                          * distance values.  If the value isn't fully up-to-
2424                          * date, update it. */
2425                         mid_up = mid + F_DEPTH(flist->sorted[mid]);
2426                         if (!F_IS_ACTIVE(flist->sorted[mid_up])) {
2427                                 do {
2428                                     mid_up += F_DEPTH(flist->sorted[mid_up]);
2429                                 } while (!F_IS_ACTIVE(flist->sorted[mid_up]));
2430                                 F_DEPTH(flist->sorted[mid]) = mid_up - mid;
2431                         }
2432                         if (mid_up > high) {
2433                                 /* If there's nothing left above us, set high to
2434                                  * a non-empty entry below us and continue. */
2435                                 high = mid - (int)flist->sorted[mid]->len32;
2436                                 if (!F_IS_ACTIVE(flist->sorted[high])) {
2437                                         do {
2438                                             high -= (int)flist->sorted[high]->len32;
2439                                         } while (!F_IS_ACTIVE(flist->sorted[high]));
2440                                         flist->sorted[mid]->len32 = mid - high;
2441                                 }
2442                                 continue;
2443                         }
2444                 }
2445                 diff = f_name_cmp(flist->sorted[mid_up], f);
2446                 if (diff == 0) {
2447                         if (protocol_version < 29
2448                             && S_ISDIR(flist->sorted[mid_up]->mode)
2449                             != S_ISDIR(f->mode))
2450                                 return -1;
2451                         return mid_up;
2452                 }
2453                 if (diff < 0)
2454                         low = mid_up + 1;
2455                 else
2456                         high = mid - 1;
2457         }
2458         return -1;
2459 }
2460
2461 /*
2462  * Free up any resources a file_struct has allocated
2463  * and clear the file.
2464  */
2465 void clear_file(struct file_struct *file)
2466 {
2467         /* The +1 zeros out the first char of the basename. */
2468         memset(file, 0, FILE_STRUCT_LEN + 1);
2469         /* In an empty entry, F_DEPTH() is an offset to the next non-empty
2470          * entry.  Likewise for len32 in the opposite direction.  We assume
2471          * that we're alone for now since flist_find() will adjust the counts
2472          * it runs into that aren't up-to-date. */
2473         file->len32 = F_DEPTH(file) = 1;
2474 }
2475
2476 /* Allocate a new file list. */
2477 struct file_list *flist_new(int flags, char *msg)
2478 {
2479         struct file_list *flist;
2480
2481         if (!(flist = new0(struct file_list)))
2482                 out_of_memory(msg);
2483
2484         if (flags & FLIST_TEMP) {
2485                 if (!(flist->file_pool = pool_create(SMALL_EXTENT, 0,
2486                                                 out_of_memory, POOL_INTERN)))
2487                         out_of_memory(msg);
2488         } else {
2489                 /* This is a doubly linked list with prev looping back to
2490                  * the end of the list, but the last next pointer is NULL. */
2491                 if (!first_flist) {
2492                         flist->file_pool = pool_create(NORMAL_EXTENT, 0,
2493                                                 out_of_memory, POOL_INTERN);
2494                         if (!flist->file_pool)
2495                                 out_of_memory(msg);
2496
2497                         flist->ndx_start = flist->flist_num = inc_recurse ? 1 : 0;
2498
2499                         first_flist = cur_flist = flist->prev = flist;
2500                 } else {
2501                         struct file_list *prev = first_flist->prev;
2502
2503                         flist->file_pool = first_flist->file_pool;
2504
2505                         flist->ndx_start = prev->ndx_start + prev->used + 1;
2506                         flist->flist_num = prev->flist_num + 1;
2507
2508                         flist->prev = prev;
2509                         prev->next = first_flist->prev = flist;
2510                 }
2511                 flist->pool_boundary = pool_boundary(flist->file_pool, 0);
2512                 flist_cnt++;
2513         }
2514
2515         return flist;
2516 }
2517
2518 /* Free up all elements in a flist. */
2519 void flist_free(struct file_list *flist)
2520 {
2521         if (!flist->prev) {
2522                 /* Was FLIST_TEMP dir-list. */
2523         } else if (flist == flist->prev) {
2524                 first_flist = cur_flist = NULL;
2525                 file_total = 0;
2526                 flist_cnt = 0;
2527         } else {
2528                 if (flist == cur_flist)
2529                         cur_flist = flist->next;
2530                 if (flist == first_flist)
2531                         first_flist = first_flist->next;
2532                 else {
2533                         flist->prev->next = flist->next;
2534                         if (!flist->next)
2535                                 flist->next = first_flist;
2536                 }
2537                 flist->next->prev = flist->prev;
2538                 file_total -= flist->used;
2539                 flist_cnt--;
2540         }
2541
2542         if (!flist->prev || !flist_cnt)
2543                 pool_destroy(flist->file_pool);
2544         else
2545                 pool_free_old(flist->file_pool, flist->pool_boundary);
2546
2547         if (flist->sorted && flist->sorted != flist->files)
2548                 free(flist->sorted);
2549         free(flist->files);
2550         free(flist);
2551 }
2552
2553 /* This routine ensures we don't have any duplicate names in our file list.
2554  * duplicate names can cause corruption because of the pipelining. */
2555 static void flist_sort_and_clean(struct file_list *flist, int strip_root)
2556 {
2557         char fbuf[MAXPATHLEN];
2558         int i, prev_i;
2559
2560         if (!flist)
2561                 return;
2562         if (flist->used == 0) {
2563                 flist->high = -1;
2564                 flist->low = 0;
2565                 return;
2566         }
2567
2568         fsort(flist->sorted, flist->used);
2569
2570         if (!am_sender || inc_recurse) {
2571                 for (i = prev_i = 0; i < flist->used; i++) {
2572                         if (F_IS_ACTIVE(flist->sorted[i])) {
2573                                 prev_i = i;
2574                                 break;
2575                         }
2576                 }
2577                 flist->low = prev_i;
2578         } else {
2579                 i = prev_i = flist->used - 1;
2580                 flist->low = 0;
2581         }
2582
2583         while (++i < flist->used) {
2584                 int j;
2585                 struct file_struct *file = flist->sorted[i];
2586
2587                 if (!F_IS_ACTIVE(file))
2588                         continue;
2589                 if (f_name_cmp(file, flist->sorted[prev_i]) == 0)
2590                         j = prev_i;
2591                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
2592                         int save_mode = file->mode;
2593                         /* Make sure that this directory doesn't duplicate a
2594                          * non-directory earlier in the list. */
2595                         flist->high = prev_i;
2596                         file->mode = S_IFREG;
2597                         j = flist_find(flist, file);
2598                         file->mode = save_mode;
2599                 } else
2600                         j = -1;
2601                 if (j >= 0) {
2602                         int keep, drop;
2603                         /* If one is a dir and the other is not, we want to
2604                          * keep the dir because it might have contents in the
2605                          * list.  Otherwise keep the first one. */
2606                         if (S_ISDIR(file->mode)) {
2607                                 struct file_struct *fp = flist->sorted[j];
2608                                 if (!S_ISDIR(fp->mode))
2609                                         keep = i, drop = j;
2610                                 else {
2611                                         if (am_sender)
2612                                                 file->flags |= FLAG_DUPLICATE;
2613                                         else { /* Make sure we merge our vital flags. */
2614                                                 fp->flags |= file->flags & (FLAG_TOP_DIR|FLAG_CONTENT_DIR);
2615                                                 fp->flags &= file->flags | ~FLAG_IMPLIED_DIR;
2616                                         }
2617                                         keep = j, drop = i;
2618                                 }
2619                         } else
2620                                 keep = j, drop = i;
2621
2622                         if (!am_sender) {
2623                                 if (verbose > 1) {
2624                                         rprintf(FINFO,
2625                                             "removing duplicate name %s from file list (%d)\n",
2626                                             f_name(file, fbuf), drop + flist->ndx_start);
2627                                 }
2628                                 clear_file(flist->sorted[drop]);
2629                         }
2630
2631                         if (keep == i) {
2632                                 if (flist->low == drop) {
2633                                         for (j = drop + 1;
2634                                              j < i && !F_IS_ACTIVE(flist->sorted[j]);
2635                                              j++) {}
2636                                         flist->low = j;
2637                                 }
2638                                 prev_i = i;
2639                         }
2640                 } else
2641                         prev_i = i;
2642         }
2643         flist->high = prev_i;
2644
2645         if (strip_root) {
2646                 /* We need to strip off the leading slashes for relative
2647                  * paths, but this must be done _after_ the sorting phase. */
2648                 for (i = flist->low; i <= flist->high; i++) {
2649                         struct file_struct *file = flist->sorted[i];
2650
2651                         if (!file->dirname)
2652                                 continue;
2653                         while (*file->dirname == '/')
2654                                 file->dirname++;
2655                         if (!*file->dirname)
2656                                 file->dirname = NULL;
2657                 }
2658         }
2659
2660         if (prune_empty_dirs && !am_sender) {
2661                 int j, prev_depth = 0;
2662
2663                 prev_i = 0; /* It's OK that this isn't really true. */
2664
2665                 for (i = flist->low; i <= flist->high; i++) {
2666                         struct file_struct *fp, *file = flist->sorted[i];
2667
2668                         /* This temporarily abuses the F_DEPTH() value for a
2669                          * directory that is in a chain that might get pruned.
2670                          * We restore the old value if it gets a reprieve. */
2671                         if (S_ISDIR(file->mode) && F_DEPTH(file)) {
2672                                 /* Dump empty dirs when coming back down. */
2673                                 for (j = prev_depth; j >= F_DEPTH(file); j--) {
2674                                         fp = flist->sorted[prev_i];
2675                                         if (F_DEPTH(fp) >= 0)
2676                                                 break;
2677                                         prev_i = -F_DEPTH(fp)-1;
2678                                         clear_file(fp);
2679                                 }
2680                                 prev_depth = F_DEPTH(file);
2681                                 if (is_excluded(f_name(file, fbuf), 1,
2682                                                        ALL_FILTERS)) {
2683                                         /* Keep dirs through this dir. */
2684                                         for (j = prev_depth-1; ; j--) {
2685                                                 fp = flist->sorted[prev_i];
2686                                                 if (F_DEPTH(fp) >= 0)
2687                                                         break;
2688                                                 prev_i = -F_DEPTH(fp)-1;
2689                                                 F_DEPTH(fp) = j;
2690                                         }
2691                                 } else
2692                                         F_DEPTH(file) = -prev_i-1;
2693                                 prev_i = i;
2694                         } else {
2695                                 /* Keep dirs through this non-dir. */
2696                                 for (j = prev_depth; ; j--) {
2697                                         fp = flist->sorted[prev_i];
2698                                         if (F_DEPTH(fp) >= 0)
2699                                                 break;
2700                                         prev_i = -F_DEPTH(fp)-1;
2701                                         F_DEPTH(fp) = j;
2702                                 }
2703                         }
2704                 }
2705                 /* Dump all remaining empty dirs. */
2706                 while (1) {
2707                         struct file_struct *fp = flist->sorted[prev_i];
2708                         if (F_DEPTH(fp) >= 0)
2709                                 break;
2710                         prev_i = -F_DEPTH(fp)-1;
2711                         clear_file(fp);
2712                 }
2713
2714                 for (i = flist->low; i <= flist->high; i++) {
2715                         if (F_IS_ACTIVE(flist->sorted[i]))
2716                                 break;
2717                 }
2718                 flist->low = i;
2719                 for (i = flist->high; i >= flist->low; i--) {
2720                         if (F_IS_ACTIVE(flist->sorted[i]))
2721                                 break;
2722                 }
2723                 flist->high = i;
2724         }
2725 }
2726
2727 static void output_flist(struct file_list *flist)
2728 {
2729         char uidbuf[16], gidbuf[16], depthbuf[16];
2730         struct file_struct *file;
2731         const char *root, *dir, *slash, *name, *trail;
2732         const char *who = who_am_i();
2733         int i;
2734
2735         rprintf(FINFO, "[%s] flist start=%d, used=%d, low=%d, high=%d\n",
2736                 who, flist->ndx_start, flist->used, flist->low, flist->high);
2737         for (i = 0; i < flist->used; i++) {
2738                 file = flist->files[i];
2739                 if ((am_root || am_sender) && uid_ndx) {
2740                         snprintf(uidbuf, sizeof uidbuf, " uid=%u",
2741                                  F_OWNER(file));
2742                 } else
2743                         *uidbuf = '\0';
2744                 if (gid_ndx) {
2745                         static char parens[] = "(\0)\0\0\0";
2746                         char *pp = parens + (file->flags & FLAG_SKIP_GROUP ? 0 : 3);
2747                         snprintf(gidbuf, sizeof gidbuf, " gid=%s%u%s",
2748                                  pp, F_GROUP(file), pp + 2);
2749                 } else
2750                         *gidbuf = '\0';
2751                 if (!am_sender)
2752                         snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file));
2753                 if (F_IS_ACTIVE(file)) {
2754                         root = am_sender ? NS(F_PATHNAME(file)) : depthbuf;
2755                         if ((dir = file->dirname) == NULL)
2756                                 dir = slash = "";
2757                         else
2758                                 slash = "/";
2759                         name = file->basename;
2760                         trail = S_ISDIR(file->mode) ? "/" : "";
2761                 } else
2762                         root = dir = slash = name = trail = "";
2763                 rprintf(FINFO,
2764                         "[%s] i=%d %s %s%s%s%s mode=0%o len=%.0f%s%s flags=%x\n",
2765                         who, i + flist->ndx_start,
2766                         root, dir, slash, name, trail,
2767                         (int)file->mode, (double)F_LENGTH(file),
2768                         uidbuf, gidbuf, file->flags);
2769         }
2770 }
2771
2772 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
2773 enum fnc_type { t_PATH, t_ITEM };
2774
2775 static int found_prefix;
2776
2777 /* Compare the names of two file_struct entities, similar to how strcmp()
2778  * would do if it were operating on the joined strings.
2779  *
2780  * Some differences beginning with protocol_version 29: (1) directory names
2781  * are compared with an assumed trailing slash so that they compare in a
2782  * way that would cause them to sort immediately prior to any content they
2783  * may have; (2) a directory of any name compares after a non-directory of
2784  * any name at the same depth; (3) a directory with name "." compares prior
2785  * to anything else.  These changes mean that a directory and a non-dir
2786  * with the same name will not compare as equal (protocol_version >= 29).
2787  *
2788  * The dirname component can be an empty string, but the basename component
2789  * cannot (and never is in the current codebase).  The basename component
2790  * may be NULL (for a removed item), in which case it is considered to be
2791  * after any existing item. */
2792 int f_name_cmp(const struct file_struct *f1, const struct file_struct *f2)
2793 {
2794         int dif;
2795         const uchar *c1, *c2;
2796         enum fnc_state state1, state2;
2797         enum fnc_type type1, type2;
2798         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
2799
2800         if (!f1 || !F_IS_ACTIVE(f1)) {
2801                 if (!f2 || !F_IS_ACTIVE(f2))
2802                         return 0;
2803                 return -1;
2804         }
2805         if (!f2 || !F_IS_ACTIVE(f2))
2806                 return 1;
2807
2808         c1 = (uchar*)f1->dirname;
2809         c2 = (uchar*)f2->dirname;
2810         if (c1 == c2)
2811                 c1 = c2 = NULL;
2812         if (!c1) {
2813                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2814                 c1 = (const uchar*)f1->basename;
2815                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2816                         type1 = t_ITEM;
2817                         state1 = s_TRAILING;
2818                         c1 = (uchar*)"";
2819                 } else
2820                         state1 = s_BASE;
2821         } else {
2822                 type1 = t_path;
2823                 state1 = s_DIR;
2824         }
2825         if (!c2) {
2826                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2827                 c2 = (const uchar*)f2->basename;
2828                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2829                         type2 = t_ITEM;
2830                         state2 = s_TRAILING;
2831                         c2 = (uchar*)"";
2832                 } else
2833                         state2 = s_BASE;
2834         } else {
2835                 type2 = t_path;
2836                 state2 = s_DIR;
2837         }
2838
2839         if (type1 != type2)
2840                 return type1 == t_PATH ? 1 : -1;
2841
2842         do {
2843                 if (!*c1) {
2844                         switch (state1) {
2845                         case s_DIR:
2846                                 state1 = s_SLASH;
2847                                 c1 = (uchar*)"/";
2848                                 break;
2849                         case s_SLASH:
2850                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2851                                 c1 = (const uchar*)f1->basename;
2852                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2853                                         type1 = t_ITEM;
2854                                         state1 = s_TRAILING;
2855                                         c1 = (uchar*)"";
2856                                 } else
2857                                         state1 = s_BASE;
2858                                 break;
2859                         case s_BASE:
2860                                 state1 = s_TRAILING;
2861                                 if (type1 == t_PATH) {
2862                                         c1 = (uchar*)"/";
2863                                         break;
2864                                 }
2865                                 /* FALL THROUGH */
2866                         case s_TRAILING:
2867                                 type1 = t_ITEM;
2868                                 break;
2869                         }
2870                         if (*c2 && type1 != type2)
2871                                 return type1 == t_PATH ? 1 : -1;
2872                 }
2873                 if (!*c2) {
2874                         switch (state2) {
2875                         case s_DIR:
2876                                 state2 = s_SLASH;
2877                                 c2 = (uchar*)"/";
2878                                 break;
2879                         case s_SLASH:
2880                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2881                                 c2 = (const uchar*)f2->basename;
2882                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2883                                         type2 = t_ITEM;
2884                                         state2 = s_TRAILING;
2885                                         c2 = (uchar*)"";
2886                                 } else
2887                                         state2 = s_BASE;
2888                                 break;
2889                         case s_BASE:
2890                                 state2 = s_TRAILING;
2891                                 if (type2 == t_PATH) {
2892                                         c2 = (uchar*)"/";
2893                                         break;
2894                                 }
2895                                 /* FALL THROUGH */
2896                         case s_TRAILING:
2897                                 found_prefix = 1;
2898                                 if (!*c1)
2899                                         return 0;
2900                                 type2 = t_ITEM;
2901                                 break;
2902                         }
2903                         if (type1 != type2)
2904                                 return type1 == t_PATH ? 1 : -1;
2905                 }
2906         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
2907
2908         return dif;
2909 }
2910
2911 /* Returns 1 if f1's filename has all of f2's filename as a prefix.  This does
2912  * not match if f2's basename is not an exact match of a path element in f1.
2913  * E.g. /path/foo is not a prefix of /path/foobar/baz, but /path/foobar is. */
2914 int f_name_has_prefix(const struct file_struct *f1, const struct file_struct *f2)
2915 {
2916         found_prefix = 0;
2917         f_name_cmp(f1, f2);
2918         return found_prefix;
2919 }
2920
2921 char *f_name_buf(void)
2922 {
2923         static char names[5][MAXPATHLEN];
2924         static unsigned int n;
2925
2926         n = (n + 1) % (sizeof names / sizeof names[0]);
2927
2928         return names[n];
2929 }
2930
2931 /* Return a copy of the full filename of a flist entry, using the indicated
2932  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
2933  * done because we checked the size when creating the file_struct entry.
2934  */
2935 char *f_name(const struct file_struct *f, char *fbuf)
2936 {
2937         if (!f || !F_IS_ACTIVE(f))
2938                 return NULL;
2939
2940         if (!fbuf)
2941                 fbuf = f_name_buf();
2942
2943         if (f->dirname) {
2944                 int len = strlen(f->dirname);
2945                 memcpy(fbuf, f->dirname, len);
2946                 fbuf[len] = '/';
2947                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
2948         } else
2949                 strlcpy(fbuf, f->basename, MAXPATHLEN);
2950
2951         return fbuf;
2952 }
2953
2954 /* Do a non-recursive scan of the named directory, possibly ignoring all
2955  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
2956  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
2957  * buffer (the functions we call will append names onto the end, but the old
2958  * dir value will be restored on exit). */
2959 struct file_list *get_dirlist(char *dirname, int dlen, int ignore_filter_rules)
2960 {
2961         struct file_list *dirlist;
2962         char dirbuf[MAXPATHLEN];
2963         int save_recurse = recurse;
2964         int save_xfer_dirs = xfer_dirs;
2965         int save_prune_empty_dirs = prune_empty_dirs;
2966
2967         if (dlen < 0) {
2968                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
2969                 if (dlen >= MAXPATHLEN)
2970                         return NULL;
2971                 dirname = dirbuf;
2972         }
2973
2974         dirlist = flist_new(FLIST_TEMP, "get_dirlist");
2975
2976         recurse = 0;
2977         xfer_dirs = 1;
2978         send_directory(ignore_filter_rules ? -2 : -1, dirlist, dirname, dlen, 0);
2979         xfer_dirs = save_xfer_dirs;
2980         recurse = save_recurse;
2981         if (do_progress)
2982                 flist_count_offset += dirlist->used;
2983
2984         prune_empty_dirs = 0;
2985         dirlist->sorted = dirlist->files;
2986         flist_sort_and_clean(dirlist, 0);
2987         prune_empty_dirs = save_prune_empty_dirs;
2988
2989         if (verbose > 3)
2990                 output_flist(dirlist);
2991
2992         return dirlist;
2993 }