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) 2002-2007 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_acls;
  48 extern int preserve_xattrs;
  49 extern int preserve_links;
  50 extern int preserve_hard_links;
  51 extern int preserve_devices;
  52 extern int preserve_specials;
  53 extern int uid_ndx;
  54 extern int gid_ndx;
  55 extern int eol_nulls;
  56 extern int relative_paths;
  57 extern int implied_dirs;
  58 extern int file_extra_cnt;
  59 extern int ignore_perishable;
  60 extern int non_perishable_cnt;
  61 extern int prune_empty_dirs;
  62 extern int copy_links;
  63 extern int copy_unsafe_links;
  64 extern int protocol_version;
  65 extern int sanitize_paths;
  66 extern int munge_symlinks;
  67 extern int need_unsorted_flist;
  68 extern int unsort_ndx;
  69 extern struct stats stats;
  70 extern char *filesfrom_host;
  71
  72 extern char curr_dir[MAXPATHLEN];
  73
  74 extern struct chmod_mode_struct *chmod_modes;
  75
  76 extern struct filter_list_struct filter_list;
  77 extern struct filter_list_struct server_filter_list;
  78
  79 #ifdef ICONV_OPTION
  80 extern int filesfrom_convert;
  81 extern iconv_t ic_send, ic_recv;
  82 #endif
  83
  84 #define PTR_SIZE (sizeof (struct file_struct *))
  85
  86 int io_error;
  87 int checksum_len;
  88 dev_t filesystem_dev; /* used to implement -x */
  89
  90 struct file_list *cur_flist, *first_flist, *dir_flist;
  91 int send_dir_ndx = -1, send_dir_depth = -1;
  92 int flist_cnt = 0; /* how many (non-tmp) file list objects exist */
  93 int file_total = 0; /* total of all active items over all file-lists */
  94 int flist_eof = 0; /* all the file-lists are now known */
  95
  96 #define NORMAL_NAME 0
  97 #define SLASH_ENDING_NAME 1
  98 #define DOT_NAME 2
  99
 100 /* Starting from protocol version 26, we always use 64-bit ino_t and dev_t
 101  * internally, even if this platform does not allow files to have 64-bit inums.
 102  * The only exception is if we're on a platform with no 64-bit type at all.
 103  *
 104  * Because we use read_longint() to get these off the wire, if you transfer
 105  * devices or (for protocols < 30) hardlinks with dev or inum > 2**32 to a
 106  * machine with no 64-bit types then you will get an overflow error.
 107  *
 108  * Note that if you transfer devices from a 64-bit-devt machine (say, Solaris)
 109  * to a 32-bit-devt machine (say, Linux-2.2/x86) then the device numbers will
 110  * be truncated.  But it's a kind of silly thing to do anyhow. */
 111
 112 /* The tmp_* vars are used as a cache area by make_file() to store data
 113  * that the sender doesn't need to remember in its file list.  The data
 114  * will survive just long enough to be used by send_file_entry(). */
 115 static dev_t tmp_rdev;
 116 #ifdef SUPPORT_HARD_LINKS
 117 static int64 tmp_dev, tmp_ino;
 118 #endif
 119 static char tmp_sum[MAX_DIGEST_LEN];
 120
 121 static char empty_sum[MAX_DIGEST_LEN];
 122 static int flist_count_offset; /* for --delete --progress */
 123 static int dir_count = 0;
 124 static int high_hlink_ndx;
 125
 126 static void clean_flist(struct file_list *flist, int strip_root);
 127 static void output_flist(struct file_list *flist);
 128
 129 void init_flist(void)
 130 {
 131         if (verbose > 4) {
 132                 rprintf(FINFO, "FILE_STRUCT_LEN=%d, EXTRA_LEN=%d\n",
 133                         (int)FILE_STRUCT_LEN, (int)EXTRA_LEN);
 134         }
 135         checksum_len = protocol_version < 21 ? 2
 136                      : protocol_version < 30 ? MD4_DIGEST_LEN
 137                      : MD5_DIGEST_LEN;
 138 }
 139
 140 static int show_filelist_p(void)
 141 {
 142         return verbose && xfer_dirs && !am_server && !inc_recurse;
 143 }
 144
 145 static void start_filelist_progress(char *kind)
 146 {
 147         rprintf(FCLIENT, "%s ... ", kind);
 148         if (verbose > 1 || do_progress)
 149                 rprintf(FCLIENT, "\n");
 150         rflush(FINFO);
 151 }
 152
 153 static void emit_filelist_progress(int count)
 154 {
 155         rprintf(FCLIENT, " %d files...\r", count);
 156 }
 157
 158 static void maybe_emit_filelist_progress(int count)
 159 {
 160         if (do_progress && show_filelist_p() && (count % 100) == 0)
 161                 emit_filelist_progress(count);
 162 }
 163
 164 static void finish_filelist_progress(const struct file_list *flist)
 165 {
 166         if (do_progress) {
 167                 /* This overwrites the progress line */
 168                 rprintf(FINFO, "%d file%sto consider\n",
 169                         flist->used, flist->used == 1 ? " " : "s ");
 170         } else
 171                 rprintf(FINFO, "done\n");
 172 }
 173
 174 void show_flist_stats(void)
 175 {
 176         /* Nothing yet */
 177 }
 178
 179 /* Stat either a symlink or its referent, depending on the settings of
 180  * copy_links, copy_unsafe_links, etc.  Returns -1 on error, 0 on success.
 181  *
 182  * If path is the name of a symlink, then the linkbuf buffer (which must hold
 183  * MAXPATHLEN chars) will be set to the symlink's target string.
 184  *
 185  * The stat structure pointed to by stp will contain information about the
 186  * link or the referent as appropriate, if they exist. */
 187 static int readlink_stat(const char *path, STRUCT_STAT *stp, char *linkbuf)
 188 {
 189 #ifdef SUPPORT_LINKS
 190         if (link_stat(path, stp, copy_dirlinks) < 0)
 191                 return -1;
 192         if (S_ISLNK(stp->st_mode)) {
 193                 int llen = readlink(path, linkbuf, MAXPATHLEN - 1);
 194                 if (llen < 0)
 195                         return -1;
 196                 linkbuf[llen] = '\0';
 197                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 198                         if (verbose > 1) {
 199                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 200                                         path, linkbuf);
 201                         }
 202                         return x_stat(path, stp, NULL);
 203                 }
 204                 if (munge_symlinks && am_sender && llen > SYMLINK_PREFIX_LEN
 205                  && strncmp(linkbuf, SYMLINK_PREFIX, SYMLINK_PREFIX_LEN) == 0) {
 206                         memmove(linkbuf, linkbuf + SYMLINK_PREFIX_LEN,
 207                                 llen - SYMLINK_PREFIX_LEN + 1);
 208                 }
 209         }
 210         return 0;
 211 #else
 212         return x_stat(path, stp, NULL);
 213 #endif
 214 }
 215
 216 int link_stat(const char *path, STRUCT_STAT *stp, int follow_dirlinks)
 217 {
 218 #ifdef SUPPORT_LINKS
 219         if (copy_links)
 220                 return x_stat(path, stp, NULL);
 221         if (x_lstat(path, stp, NULL) < 0)
 222                 return -1;
 223         if (follow_dirlinks && S_ISLNK(stp->st_mode)) {
 224                 STRUCT_STAT st;
 225                 if (x_stat(path, &st, NULL) == 0 && S_ISDIR(st.st_mode))
 226                         *stp = st;
 227         }
 228         return 0;
 229 #else
 230         return x_stat(path, stp, NULL);
 231 #endif
 232 }
 233
 234 /* This function is used to check if a file should be included/excluded
 235  * from the list of files based on its name and type etc.  The value of
 236  * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
 237 static int is_excluded(char *fname, int is_dir, int filter_level)
 238 {
 239 #if 0 /* This currently never happens, so avoid a useless compare. */
 240         if (filter_level == NO_FILTERS)
 241                 return 0;
 242 #endif
 243         if (fname) {
 244                 /* never exclude '.', even if somebody does --exclude '*' */
 245                 if (fname[0] == '.' && !fname[1])
 246                         return 0;
 247                 /* Handle the -R version of the '.' dir. */
 248                 if (fname[0] == '/') {
 249                         int len = strlen(fname);
 250                         if (fname[len-1] == '.' && fname[len-2] == '/')
 251                                 return 0;
 252                 }
 253         }
 254         if (server_filter_list.head
 255             && check_filter(&server_filter_list, fname, is_dir) < 0)
 256                 return 1;
 257         if (filter_level != ALL_FILTERS)
 258                 return 0;
 259         if (filter_list.head
 260             && check_filter(&filter_list, fname, is_dir) < 0)
 261                 return 1;
 262         return 0;
 263 }
 264
 265 static void send_directory(int f, struct file_list *flist,
 266                            char *fbuf, int len, int flags);
 267
 268 static const char *pathname, *orig_dir;
 269 static int pathname_len;
 270
 271
 272 /* Make sure flist can hold at least flist->used + extra entries. */
 273 static void flist_expand(struct file_list *flist, int extra)
 274 {
 275         struct file_struct **new_ptr;
 276
 277         if (flist->used + extra <= flist->malloced)
 278                 return;
 279
 280         if (flist->malloced < FLIST_START)
 281                 flist->malloced = FLIST_START;
 282         else if (flist->malloced >= FLIST_LINEAR)
 283                 flist->malloced += FLIST_LINEAR;
 284         else
 285                 flist->malloced *= 2;
 286
 287         /* In case count jumped or we are starting the list
 288          * with a known size just set it. */
 289         if (flist->malloced < flist->used + extra)
 290                 flist->malloced = flist->used + extra;
 291
 292         new_ptr = realloc_array(flist->files, struct file_struct *,
 293                                 flist->malloced);
 294
 295         if (verbose >= 2 && flist->malloced != FLIST_START) {
 296                 rprintf(FCLIENT, "[%s] expand file_list pointer array to %.0f bytes, did%s move\n",
 297                     who_am_i(),
 298                     (double)sizeof flist->files[0] * flist->malloced,
 299                     (new_ptr == flist->files) ? " not" : "");
 300         }
 301
 302         flist->files = new_ptr;
 303
 304         if (!flist->files)
 305                 out_of_memory("flist_expand");
 306 }
 307
 308 static void flist_done_allocating(struct file_list *flist)
 309 {
 310         void *ptr = pool_boundary(flist->file_pool, 8*1024);
 311         if (flist->pool_boundary == ptr)
 312                 flist->pool_boundary = NULL; /* list didn't use any pool memory */
 313         else
 314                 flist->pool_boundary = ptr;
 315 }
 316
 317 int push_pathname(const char *dir, int len)
 318 {
 319         if (dir == pathname)
 320                 return 1;
 321
 322         if (!orig_dir)
 323                 orig_dir = strdup(curr_dir);
 324
 325         if (pathname && !pop_dir(orig_dir)) {
 326                 rsyserr(FERROR, errno, "pop_dir %s failed",
 327                         full_fname(orig_dir));
 328                 exit_cleanup(RERR_FILESELECT);
 329         }
 330
 331         if (dir && !push_dir(dir, 0)) {
 332                 io_error |= IOERR_GENERAL;
 333                 rsyserr(FERROR, errno, "push_dir %s failed in %s",
 334                         full_fname(dir), curr_dir);
 335                 return 0;
 336         }
 337
 338         pathname = dir;
 339         pathname_len = len >= 0 ? len : dir ? (int)strlen(dir) : 0;
 340
 341         return 1;
 342 }
 343
 344 static void send_file_entry(int f, struct file_struct *file, int ndx, int first_ndx)
 345 {
 346         static time_t modtime;
 347         static mode_t mode;
 348 #ifdef SUPPORT_HARD_LINKS
 349         static int64 dev;
 350 #endif
 351         static dev_t rdev;
 352         static uint32 rdev_major;
 353         static uid_t uid;
 354         static gid_t gid;
 355         static char *user_name, *group_name;
 356         static char lastname[MAXPATHLEN];
 357         char fname[MAXPATHLEN];
 358         int first_hlink_ndx = -1;
 359         int l1, l2;
 360         int xflags;
 361
 362 #ifdef ICONV_OPTION
 363         if (ic_send != (iconv_t)-1) {
 364                 xbuf outbuf, inbuf;
 365
 366                 INIT_CONST_XBUF(outbuf, fname);
 367
 368                 if (file->dirname) {
 369                         INIT_XBUF_STRLEN(inbuf, (char*)file->dirname);
 370                         outbuf.size -= 2; /* Reserve room for '/' & 1 more char. */
 371                         if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0)
 372                                 goto convert_error;
 373                         outbuf.size += 2;
 374                         outbuf.buf[outbuf.len++] = '/';
 375                 }
 376
 377                 INIT_XBUF_STRLEN(inbuf, (char*)file->basename);
 378                 if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0) {
 379                   convert_error:
 380                         io_error |= IOERR_GENERAL;
 381                         rprintf(FINFO,
 382                             "[%s] cannot convert filename: %s (%s)\n",
 383                             who_am_i(), f_name(file, fname), strerror(errno));
 384                         return;
 385                 }
 386                 outbuf.buf[outbuf.len] = '\0';
 387         } else
 388 #endif
 389                 f_name(file, fname);
 390
 391         /* Initialize starting value of xflags. */
 392         if (protocol_version >= 30 && S_ISDIR(file->mode)) {
 393                 if (file->flags & FLAG_CONTENT_DIR)
 394                         xflags = file->flags & FLAG_TOP_DIR;
 395                 else if (file->flags & FLAG_IMPLIED_DIR)
 396                         xflags = XMIT_TOP_DIR | XMIT_NO_CONTENT_DIR;
 397                 else
 398                         xflags = XMIT_NO_CONTENT_DIR;
 399         } else
 400                 xflags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */
 401
 402         if (file->mode == mode)
 403                 xflags |= XMIT_SAME_MODE;
 404         else
 405                 mode = file->mode;
 406
 407         if ((preserve_devices && IS_DEVICE(mode))
 408          || (preserve_specials && IS_SPECIAL(mode))) {
 409                 if (protocol_version < 28) {
 410                         if (tmp_rdev == rdev)
 411                                 xflags |= XMIT_SAME_RDEV_pre28;
 412                         else
 413                                 rdev = tmp_rdev;
 414                 } else {
 415                         rdev = tmp_rdev;
 416                         if ((uint32)major(rdev) == rdev_major)
 417                                 xflags |= XMIT_SAME_RDEV_MAJOR;
 418                         else
 419                                 rdev_major = major(rdev);
 420                         if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu)
 421                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
 422                 }
 423         } else if (protocol_version < 28)
 424                 rdev = MAKEDEV(0, 0);
 425         if (uid_ndx) {
 426                 if ((uid_t)F_OWNER(file) == uid && *lastname)
 427                         xflags |= XMIT_SAME_UID;
 428                 else {
 429                         uid = F_OWNER(file);
 430                         if (uid_ndx && !numeric_ids) {
 431                                 user_name = add_uid(uid);
 432                                 if (inc_recurse && user_name)
 433                                         xflags |= XMIT_USER_NAME_FOLLOWS;
 434                         }
 435                 }
 436         }
 437         if (gid_ndx) {
 438                 if ((gid_t)F_GROUP(file) == gid && *lastname)
 439                         xflags |= XMIT_SAME_GID;
 440                 else {
 441                         gid = F_GROUP(file);
 442                         if (gid_ndx && !numeric_ids) {
 443                                 group_name = add_gid(gid);
 444                                 if (inc_recurse && group_name)
 445                                         xflags |= XMIT_GROUP_NAME_FOLLOWS;
 446                         }
 447                 }
 448         }
 449         if (file->modtime == modtime)
 450                 xflags |= XMIT_SAME_TIME;
 451         else
 452                 modtime = file->modtime;
 453
 454 #ifdef SUPPORT_HARD_LINKS
 455         if (tmp_dev != 0) {
 456                 if (protocol_version >= 30) {
 457                         struct ht_int64_node *np = idev_find(tmp_dev, tmp_ino);
 458                         first_hlink_ndx = (int32)(long)np->data - 1;
 459                         if (first_hlink_ndx < 0) {
 460                                 high_hlink_ndx = ndx + first_ndx;
 461                                 np->data = (void*)(long)(high_hlink_ndx + 1);
 462                                 xflags |= XMIT_HLINK_FIRST;
 463                         }
 464                         xflags |= XMIT_HLINKED;
 465                 } else {
 466                         if (tmp_dev == dev) {
 467                                 if (protocol_version >= 28)
 468                                         xflags |= XMIT_SAME_DEV_pre30;
 469                         } else
 470                                 dev = tmp_dev;
 471                         xflags |= XMIT_HLINKED;
 472                 }
 473         }
 474 #endif
 475
 476         for (l1 = 0;
 477             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 478             l1++) {}
 479         l2 = strlen(fname+l1);
 480
 481         if (l1 > 0)
 482                 xflags |= XMIT_SAME_NAME;
 483         if (l2 > 255)
 484                 xflags |= XMIT_LONG_NAME;
 485
 486         /* We must make sure we don't send a zero flag byte or the
 487          * other end will terminate the flist transfer.  Note that
 488          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 489          * it's harmless way to add a bit to the first flag byte. */
 490         if (protocol_version >= 28) {
 491                 if (!xflags && !S_ISDIR(mode))
 492                         xflags |= XMIT_TOP_DIR;
 493                 if ((xflags & 0xFF00) || !xflags) {
 494                         xflags |= XMIT_EXTENDED_FLAGS;
 495                         write_shortint(f, xflags);
 496                 } else
 497                         write_byte(f, xflags);
 498         } else {
 499                 if (!(xflags & 0xFF))
 500                         xflags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
 501                 write_byte(f, xflags);
 502         }
 503         if (xflags & XMIT_SAME_NAME)
 504                 write_byte(f, l1);
 505         if (xflags & XMIT_LONG_NAME)
 506                 write_varint30(f, l2);
 507         else
 508                 write_byte(f, l2);
 509         write_buf(f, fname + l1, l2);
 510
 511         if (first_hlink_ndx >= 0) {
 512                 write_varint(f, first_hlink_ndx);
 513                 if (first_hlink_ndx >= first_ndx)
 514                         goto the_end;
 515         }
 516
 517         write_varlong30(f, F_LENGTH(file), 3);
 518         if (!(xflags & XMIT_SAME_TIME)) {
 519                 if (protocol_version >= 30)
 520                         write_varlong(f, modtime, 4);
 521                 else
 522                         write_int(f, modtime);
 523         }
 524         if (!(xflags & XMIT_SAME_MODE))
 525                 write_int(f, to_wire_mode(mode));
 526         if (uid_ndx && !(xflags & XMIT_SAME_UID)) {
 527                 if (protocol_version < 30)
 528                         write_int(f, uid);
 529                 else {
 530                         write_varint(f, uid);
 531                         if (xflags & XMIT_USER_NAME_FOLLOWS) {
 532                                 int len = strlen(user_name);
 533                                 write_byte(f, len);
 534                                 write_buf(f, user_name, len);
 535                         }
 536                 }
 537         }
 538         if (gid_ndx && !(xflags & XMIT_SAME_GID)) {
 539                 if (protocol_version < 30)
 540                         write_int(f, gid);
 541                 else {
 542                         write_varint(f, gid);
 543                         if (xflags & XMIT_GROUP_NAME_FOLLOWS) {
 544                                 int len = strlen(group_name);
 545                                 write_byte(f, len);
 546                                 write_buf(f, group_name, len);
 547                         }
 548                 }
 549         }
 550         if ((preserve_devices && IS_DEVICE(mode))
 551          || (preserve_specials && IS_SPECIAL(mode))) {
 552                 if (protocol_version < 28) {
 553                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 554                                 write_int(f, (int)rdev);
 555                 } else {
 556                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 557                                 write_varint30(f, major(rdev));
 558                         if (protocol_version >= 30)
 559                                 write_varint(f, minor(rdev));
 560                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 561                                 write_byte(f, minor(rdev));
 562                         else
 563                                 write_int(f, minor(rdev));
 564                 }
 565         }
 566
 567 #ifdef SUPPORT_LINKS
 568         if (preserve_links && S_ISLNK(mode)) {
 569                 const char *sl = F_SYMLINK(file);
 570                 int len = strlen(sl);
 571                 write_varint30(f, len);
 572                 write_buf(f, sl, len);
 573         }
 574 #endif
 575
 576 #ifdef SUPPORT_HARD_LINKS
 577         if (tmp_dev != 0 && protocol_version < 30) {
 578                 if (protocol_version < 26) {
 579                         /* 32-bit dev_t and ino_t */
 580                         write_int(f, (int32)dev);
 581                         write_int(f, (int32)tmp_ino);
 582                 } else {
 583                         /* 64-bit dev_t and ino_t */
 584                         if (!(xflags & XMIT_SAME_DEV_pre30))
 585                                 write_longint(f, dev);
 586                         write_longint(f, tmp_ino);
 587                 }
 588         }
 589 #endif
 590
 591         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 592                 const char *sum;
 593                 if (S_ISREG(mode))
 594                         sum = tmp_sum;
 595                 else {
 596                         /* Prior to 28, we sent a useless set of nulls. */
 597                         sum = empty_sum;
 598                 }
 599                 write_buf(f, sum, checksum_len);
 600         }
 601
 602   the_end:
 603         strlcpy(lastname, fname, MAXPATHLEN);
 604
 605         if (S_ISREG(mode) || S_ISLNK(mode))
 606                 stats.total_size += F_LENGTH(file);
 607 }
 608
 609 static struct file_struct *recv_file_entry(struct file_list *flist,
 610                                            int xflags, int f)
 611 {
 612         static int64 modtime;
 613         static mode_t mode;
 614 #ifdef SUPPORT_HARD_LINKS
 615         static int64 dev;
 616 #endif
 617         static dev_t rdev;
 618         static uint32 rdev_major;
 619         static uid_t uid;
 620         static gid_t gid;
 621         static uint16 gid_flags;
 622         static char lastname[MAXPATHLEN], *lastdir;
 623         static int lastdir_depth, lastdir_len = -1;
 624         static unsigned int del_hier_name_len = 0;
 625         static int in_del_hier = 0;
 626         char thisname[MAXPATHLEN];
 627         unsigned int l1 = 0, l2 = 0;
 628         int alloc_len, basename_len, linkname_len;
 629         int extra_len = file_extra_cnt * EXTRA_LEN;
 630         int first_hlink_ndx = -1;
 631         OFF_T file_length;
 632         const char *basename;
 633         struct file_struct *file;
 634         alloc_pool_t *pool;
 635         char *bp;
 636
 637         if (xflags & XMIT_SAME_NAME)
 638                 l1 = read_byte(f);
 639
 640         if (xflags & XMIT_LONG_NAME)
 641                 l2 = read_varint30(f);
 642         else
 643                 l2 = read_byte(f);
 644
 645         if (l2 >= MAXPATHLEN - l1) {
 646                 rprintf(FERROR,
 647                         "overflow: xflags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
 648                         xflags, l1, l2, lastname, who_am_i());
 649                 overflow_exit("recv_file_entry");
 650         }
 651
 652         strlcpy(thisname, lastname, l1 + 1);
 653         read_sbuf(f, &thisname[l1], l2);
 654         thisname[l1 + l2] = 0;
 655
 656         /* Abuse basename_len for a moment... */
 657         basename_len = strlcpy(lastname, thisname, MAXPATHLEN);
 658
 659 #ifdef ICONV_OPTION
 660         if (ic_recv != (iconv_t)-1) {
 661                 xbuf outbuf, inbuf;
 662
 663                 INIT_CONST_XBUF(outbuf, thisname);
 664                 INIT_XBUF(inbuf, lastname, basename_len, -1);
 665
 666                 if (iconvbufs(ic_recv, &inbuf, &outbuf, 0) < 0) {
 667                         io_error |= IOERR_GENERAL;
 668                         rprintf(FINFO,
 669                             "[%s] cannot convert filename: %s (%s)\n",
 670                             who_am_i(), lastname, strerror(errno));
 671                         outbuf.len = 0;
 672                 }
 673                 outbuf.buf[outbuf.len] = '\0';
 674         }
 675 #endif
 676
 677         clean_fname(thisname, 0);
 678
 679         if (sanitize_paths)
 680                 sanitize_path(thisname, thisname, "", 0);
 681
 682         if ((basename = strrchr(thisname, '/')) != NULL) {
 683                 int len = basename++ - thisname;
 684                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
 685                         lastdir = new_array(char, len + 1);
 686                         memcpy(lastdir, thisname, len);
 687                         lastdir[len] = '\0';
 688                         lastdir_len = len;
 689                         lastdir_depth = count_dir_elements(lastdir);
 690                 }
 691         } else
 692                 basename = thisname;
 693         basename_len = strlen(basename) + 1; /* count the '\0' */
 694
 695 #ifdef SUPPORT_HARD_LINKS
 696         if (protocol_version >= 30
 697          && BITS_SETnUNSET(xflags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
 698                 first_hlink_ndx = read_varint(f);
 699                 if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->ndx_start + flist->used) {
 700                         rprintf(FERROR,
 701                                 "hard-link reference out of range: %d (%d)\n",
 702                                 first_hlink_ndx, flist->ndx_start + flist->used);
 703                         exit_cleanup(RERR_PROTOCOL);
 704                 }
 705                 if (first_hlink_ndx >= flist->ndx_start) {
 706                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 707                         file_length = F_LENGTH(first);
 708                         modtime = first->modtime;
 709                         mode = first->mode;
 710                         if (uid_ndx)
 711                                 uid = F_OWNER(first);
 712                         if (gid_ndx)
 713                                 gid = F_GROUP(first);
 714                         if ((preserve_devices && IS_DEVICE(mode))
 715                          || (preserve_specials && IS_SPECIAL(mode))) {
 716                                 uint32 *devp = F_RDEV_P(first);
 717                                 rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
 718                                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 719                         }
 720                         if (preserve_links && S_ISLNK(mode))
 721                                 linkname_len = strlen(F_SYMLINK(first)) + 1;
 722                         else
 723                                 linkname_len = 0;
 724                         goto create_object;
 725                 }
 726         }
 727 #endif
 728
 729         file_length = read_varlong30(f, 3);
 730         if (!(xflags & XMIT_SAME_TIME)) {
 731                 if (protocol_version >= 30) {
 732                         modtime = read_varlong(f, 4);
 733 #if SIZEOF_TIME_T < SIZEOF_INT64
 734                         if ((modtime > INT_MAX || modtime < INT_MIN) && !am_generator) {
 735                                 rprintf(FERROR_XFER,
 736                                     "Time value of %s truncated on receiver.\n",
 737                                     lastname);
 738                         }
 739 #endif
 740                 } else
 741                         modtime = read_int(f);
 742         }
 743         if (!(xflags & XMIT_SAME_MODE))
 744                 mode = from_wire_mode(read_int(f));
 745
 746         if (chmod_modes && !S_ISLNK(mode))
 747                 mode = tweak_mode(mode, chmod_modes);
 748
 749         if (uid_ndx && !(xflags & XMIT_SAME_UID)) {
 750                 if (protocol_version < 30)
 751                         uid = (uid_t)read_int(f);
 752                 else {
 753                         uid = (uid_t)read_varint(f);
 754                         if (xflags & XMIT_USER_NAME_FOLLOWS)
 755                                 uid = recv_user_name(f, uid);
 756                         else if (inc_recurse && am_root && !numeric_ids)
 757                                 uid = match_uid(uid);
 758                 }
 759         }
 760         if (gid_ndx && !(xflags & XMIT_SAME_GID)) {
 761                 if (protocol_version < 30)
 762                         gid = (gid_t)read_int(f);
 763                 else {
 764                         gid = (gid_t)read_varint(f);
 765                         gid_flags = 0;
 766                         if (xflags & XMIT_GROUP_NAME_FOLLOWS)
 767                                 gid = recv_group_name(f, gid, &gid_flags);
 768                         else if (inc_recurse && (!am_root || !numeric_ids))
 769                                 gid = match_gid(gid, &gid_flags);
 770                 }
 771         }
 772
 773         if ((preserve_devices && IS_DEVICE(mode))
 774          || (preserve_specials && IS_SPECIAL(mode))) {
 775                 if (protocol_version < 28) {
 776                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 777                                 rdev = (dev_t)read_int(f);
 778                 } else {
 779                         uint32 rdev_minor;
 780                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 781                                 rdev_major = read_varint30(f);
 782                         if (protocol_version >= 30)
 783                                 rdev_minor = read_varint(f);
 784                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 785                                 rdev_minor = read_byte(f);
 786                         else
 787                                 rdev_minor = read_int(f);
 788                         rdev = MAKEDEV(rdev_major, rdev_minor);
 789                 }
 790                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 791                 file_length = 0;
 792         } else if (protocol_version < 28)
 793                 rdev = MAKEDEV(0, 0);
 794
 795 #ifdef SUPPORT_LINKS
 796         if (preserve_links && S_ISLNK(mode)) {
 797                 linkname_len = read_varint30(f) + 1; /* count the '\0' */
 798                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 799                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 800                                 linkname_len - 1);
 801                         overflow_exit("recv_file_entry");
 802                 }
 803                 if (munge_symlinks)
 804                         linkname_len += SYMLINK_PREFIX_LEN;
 805         }
 806         else
 807 #endif
 808                 linkname_len = 0;
 809
 810 #ifdef SUPPORT_HARD_LINKS
 811   create_object:
 812         if (preserve_hard_links) {
 813                 if (protocol_version < 28 && S_ISREG(mode))
 814                         xflags |= XMIT_HLINKED;
 815                 if (xflags & XMIT_HLINKED)
 816                         extra_len += (inc_recurse+1) * EXTRA_LEN;
 817         }
 818 #endif
 819
 820 #ifdef SUPPORT_ACLS
 821         /* We need one or two index int32s when we're preserving ACLs. */
 822         if (preserve_acls)
 823                 extra_len += (S_ISDIR(mode) ? 2 : 1) * EXTRA_LEN;
 824 #endif
 825
 826         if (always_checksum && S_ISREG(mode))
 827                 extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
 828
 829         if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
 830                 extra_len += EXTRA_LEN;
 831
 832 #if EXTRA_ROUNDING > 0
 833         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
 834                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
 835 #endif
 836
 837         if (inc_recurse && S_ISDIR(mode)) {
 838                 if (one_file_system) {
 839                         /* Room to save the dir's device for -x */
 840                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 841                 }
 842                 pool = dir_flist->file_pool;
 843         } else
 844                 pool = flist->file_pool;
 845
 846         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
 847                   + linkname_len;
 848         bp = pool_alloc(pool, alloc_len, "recv_file_entry");
 849
 850         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
 851         bp += extra_len;
 852         file = (struct file_struct *)bp;
 853         bp += FILE_STRUCT_LEN;
 854
 855         memcpy(bp, basename, basename_len);
 856         bp += basename_len + linkname_len; /* skip space for symlink too */
 857
 858 #ifdef SUPPORT_HARD_LINKS
 859         if (xflags & XMIT_HLINKED)
 860                 file->flags |= FLAG_HLINKED;
 861 #endif
 862         file->modtime = (time_t)modtime;
 863         file->len32 = (uint32)file_length;
 864         if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
 865                 file->flags |= FLAG_LENGTH64;
 866                 OPT_EXTRA(file, 0)->unum = (uint32)(file_length >> 32);
 867         }
 868         file->mode = mode;
 869         if (uid_ndx)
 870                 F_OWNER(file) = uid;
 871         if (gid_ndx) {
 872                 F_GROUP(file) = gid;
 873                 file->flags |= gid_flags;
 874         }
 875         if (unsort_ndx)
 876                 F_NDX(file) = flist->used + flist->ndx_start;
 877
 878         if (basename != thisname) {
 879                 file->dirname = lastdir;
 880                 F_DEPTH(file) = lastdir_depth + 1;
 881         } else
 882                 F_DEPTH(file) = 1;
 883
 884         if (S_ISDIR(mode)) {
 885                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
 886                         F_DEPTH(file)--;
 887                 if (protocol_version >= 30) {
 888                         if (!(xflags & XMIT_NO_CONTENT_DIR)) {
 889                                 if (xflags & XMIT_TOP_DIR)
 890                                         file->flags |= FLAG_TOP_DIR;
 891                                 file->flags |= FLAG_CONTENT_DIR;
 892                         } else if (xflags & XMIT_TOP_DIR)
 893                                 file->flags |= FLAG_IMPLIED_DIR;
 894                 } else if (xflags & XMIT_TOP_DIR) {
 895                         in_del_hier = recurse;
 896                         del_hier_name_len = F_DEPTH(file) == 0 ? 0 : l1 + l2;
 897                         if (relative_paths && del_hier_name_len > 2
 898                             && lastname[del_hier_name_len-1] == '.'
 899                             && lastname[del_hier_name_len-2] == '/')
 900                                 del_hier_name_len -= 2;
 901                         file->flags |= FLAG_TOP_DIR | FLAG_CONTENT_DIR;
 902                 } else if (in_del_hier) {
 903                         if (!relative_paths || !del_hier_name_len
 904                          || (l1 >= del_hier_name_len
 905                           && lastname[del_hier_name_len] == '/'))
 906                                 file->flags |= FLAG_CONTENT_DIR;
 907                         else
 908                                 in_del_hier = 0;
 909                 }
 910         }
 911
 912         if ((preserve_devices && IS_DEVICE(mode))
 913          || (preserve_specials && IS_SPECIAL(mode))) {
 914                 uint32 *devp = F_RDEV_P(file);
 915                 DEV_MAJOR(devp) = major(rdev);
 916                 DEV_MINOR(devp) = minor(rdev);
 917         }
 918
 919 #ifdef SUPPORT_LINKS
 920         if (linkname_len) {
 921                 bp = (char*)file->basename + basename_len;
 922                 if (first_hlink_ndx >= flist->ndx_start) {
 923                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 924                         memcpy(bp, F_SYMLINK(first), linkname_len);
 925                 } else if (munge_symlinks) {
 926                         strlcpy(bp, SYMLINK_PREFIX, linkname_len);
 927                         bp += SYMLINK_PREFIX_LEN;
 928                         linkname_len -= SYMLINK_PREFIX_LEN;
 929                         read_sbuf(f, bp, linkname_len - 1);
 930                 } else
 931                         read_sbuf(f, bp, linkname_len - 1);
 932         }
 933 #endif
 934
 935 #ifdef SUPPORT_HARD_LINKS
 936         if (preserve_hard_links && xflags & XMIT_HLINKED) {
 937                 if (protocol_version >= 30) {
 938                         if (xflags & XMIT_HLINK_FIRST) {
 939                                 high_hlink_ndx = flist->ndx_start + flist->used;
 940                                 F_HL_GNUM(file) = high_hlink_ndx;
 941                         } else
 942                                 F_HL_GNUM(file) = first_hlink_ndx;
 943                 } else {
 944                         static int32 cnt = 0;
 945                         struct ht_int64_node *np;
 946                         int64 ino;
 947                         int32 ndx;
 948                         if (protocol_version < 26) {
 949                                 dev = read_int(f);
 950                                 ino = read_int(f);
 951                         } else {
 952                                 if (!(xflags & XMIT_SAME_DEV_pre30))
 953                                         dev = read_longint(f);
 954                                 ino = read_longint(f);
 955                         }
 956                         np = idev_find(dev, ino);
 957                         ndx = (int32)(long)np->data - 1;
 958                         if (ndx < 0) {
 959                                 ndx = cnt++;
 960                                 np->data = (void*)(long)cnt;
 961                         }
 962                         F_HL_GNUM(file) = ndx;
 963                 }
 964         }
 965 #endif
 966
 967         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 968                 if (S_ISREG(mode))
 969                         bp = F_SUM(file);
 970                 else {
 971                         /* Prior to 28, we get a useless set of nulls. */
 972                         bp = tmp_sum;
 973                 }
 974                 if (first_hlink_ndx >= flist->ndx_start) {
 975                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 976                         memcpy(bp, F_SUM(first), checksum_len);
 977                 } else
 978                         read_buf(f, bp, checksum_len);
 979         }
 980
 981 #ifdef SUPPORT_ACLS
 982         if (preserve_acls && !S_ISLNK(mode))
 983                 receive_acl(file, f);
 984 #endif
 985 #ifdef SUPPORT_XATTRS
 986         if (preserve_xattrs)
 987                 receive_xattr(file, f );
 988 #endif
 989
 990         if (S_ISREG(mode) || S_ISLNK(mode))
 991                 stats.total_size += file_length;
 992
 993         return file;
 994 }
 995
 996 /* Create a file_struct for a named file by reading its stat() information
 997  * and performing extensive checks against global options.
 998  *
 999  * Returns a pointer to the new file struct, or NULL if there was an error
1000  * or this file should be excluded. */
1001 struct file_struct *make_file(const char *fname, struct file_list *flist,
1002                               STRUCT_STAT *stp, int flags, int filter_level)
1003 {
1004         static char *lastdir;
1005         static int lastdir_len = -1;
1006         struct file_struct *file;
1007         char thisname[MAXPATHLEN];
1008         char linkname[MAXPATHLEN];
1009         int alloc_len, basename_len, linkname_len;
1010         int extra_len = file_extra_cnt * EXTRA_LEN;
1011         const char *basename;
1012         alloc_pool_t *pool;
1013         STRUCT_STAT st;
1014         char *bp;
1015
1016         if (strlcpy(thisname, fname, sizeof thisname) >= sizeof thisname) {
1017                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
1018                 return NULL;
1019         }
1020         clean_fname(thisname, 0);
1021         if (sanitize_paths)
1022                 sanitize_path(thisname, thisname, "", 0);
1023
1024         if (stp && S_ISDIR(stp->st_mode)) {
1025                 st = *stp; /* Needed for "symlink/." with --relative. */
1026                 *linkname = '\0'; /* make IBM code checker happy */
1027         } else if (readlink_stat(thisname, &st, linkname) != 0) {
1028                 int save_errno = errno;
1029                 /* See if file is excluded before reporting an error. */
1030                 if (filter_level != NO_FILTERS
1031                  && (is_excluded(thisname, 0, filter_level)
1032                   || is_excluded(thisname, 1, filter_level))) {
1033                         if (ignore_perishable && save_errno != ENOENT)
1034                                 non_perishable_cnt++;
1035                         return NULL;
1036                 }
1037                 if (save_errno == ENOENT) {
1038 #ifdef SUPPORT_LINKS
1039                         /* Avoid "vanished" error if symlink points nowhere. */
1040                         if (copy_links && x_lstat(thisname, &st, NULL) == 0
1041                             && S_ISLNK(st.st_mode)) {
1042                                 io_error |= IOERR_GENERAL;
1043                                 rprintf(FERROR_XFER, "symlink has no referent: %s\n",
1044                                         full_fname(thisname));
1045                         } else
1046 #endif
1047                         {
1048                                 enum logcode c = am_daemon && protocol_version < 28
1049                                                ? FERROR : FWARNING;
1050                                 io_error |= IOERR_VANISHED;
1051                                 rprintf(c, "file has vanished: %s\n",
1052                                         full_fname(thisname));
1053                         }
1054                 } else {
1055                         io_error |= IOERR_GENERAL;
1056                         rsyserr(FERROR_XFER, save_errno, "readlink %s failed",
1057                                 full_fname(thisname));
1058                 }
1059                 return NULL;
1060         }
1061
1062         /* backup.c calls us with filter_level set to NO_FILTERS. */
1063         if (filter_level == NO_FILTERS)
1064                 goto skip_filters;
1065
1066         if (S_ISDIR(st.st_mode)) {
1067                 if (!xfer_dirs) {
1068                         rprintf(FINFO, "skipping directory %s\n", thisname);
1069                         return NULL;
1070                 }
1071                 /* -x only affects dirs because we need to avoid recursing
1072                  * into a mount-point directory, not to avoid copying a
1073                  * symlinked file if -L (or similar) was specified. */
1074                 if (one_file_system && st.st_dev != filesystem_dev
1075                  && BITS_SETnUNSET(flags, FLAG_CONTENT_DIR, FLAG_TOP_DIR)) {
1076                         if (one_file_system > 1) {
1077                                 if (verbose > 1) {
1078                                         rprintf(FINFO,
1079                                             "[%s] skipping mount-point dir %s\n",
1080                                             who_am_i(), thisname);
1081                                 }
1082                                 return NULL;
1083                         }
1084                         flags |= FLAG_MOUNT_DIR;
1085                         flags &= ~FLAG_CONTENT_DIR;
1086                 }
1087         } else
1088                 flags &= ~FLAG_CONTENT_DIR;
1089
1090         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level)) {
1091                 if (ignore_perishable)
1092                         non_perishable_cnt++;
1093                 return NULL;
1094         }
1095
1096         if (lp_ignore_nonreadable(module_id)) {
1097 #ifdef SUPPORT_LINKS
1098                 if (!S_ISLNK(st.st_mode))
1099 #endif
1100                         if (access(thisname, R_OK) != 0)
1101                                 return NULL;
1102         }
1103
1104   skip_filters:
1105
1106         /* Only divert a directory in the main transfer. */
1107         if (flist) {
1108                 if (flist->prev && S_ISDIR(st.st_mode)
1109                  && flags & FLAG_DIVERT_DIRS) {
1110                         /* Room for parent/sibling/next-child info. */
1111                         extra_len += DIRNODE_EXTRA_CNT * EXTRA_LEN;
1112                         if (relative_paths)
1113                                 extra_len += PTR_EXTRA_CNT * EXTRA_LEN;
1114                         dir_count++;
1115                         pool = dir_flist->file_pool;
1116                 } else
1117                         pool = flist->file_pool;
1118         } else
1119                 pool = NULL;
1120
1121         if (verbose > 2) {
1122                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
1123                         who_am_i(), thisname, filter_level);
1124         }
1125
1126         if ((basename = strrchr(thisname, '/')) != NULL) {
1127                 int len = basename++ - thisname;
1128                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
1129                         lastdir = new_array(char, len + 1);
1130                         memcpy(lastdir, thisname, len);
1131                         lastdir[len] = '\0';
1132                         lastdir_len = len;
1133                 }
1134         } else
1135                 basename = thisname;
1136         basename_len = strlen(basename) + 1; /* count the '\0' */
1137
1138 #ifdef SUPPORT_LINKS
1139         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
1140 #else
1141         linkname_len = 0;
1142 #endif
1143
1144         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
1145                 extra_len += EXTRA_LEN;
1146
1147 #if EXTRA_ROUNDING > 0
1148         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
1149                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
1150 #endif
1151
1152         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
1153                   + linkname_len;
1154         if (pool)
1155                 bp = pool_alloc(pool, alloc_len, "make_file");
1156         else {
1157                 if (!(bp = new_array(char, alloc_len)))
1158                         out_of_memory("make_file");
1159         }
1160
1161         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
1162         bp += extra_len;
1163         file = (struct file_struct *)bp;
1164         bp += FILE_STRUCT_LEN;
1165
1166         memcpy(bp, basename, basename_len);
1167         bp += basename_len + linkname_len; /* skip space for symlink too */
1168
1169 #ifdef SUPPORT_HARD_LINKS
1170         if (preserve_hard_links && flist && flist->prev) {
1171                 if (protocol_version >= 28
1172                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
1173                  : S_ISREG(st.st_mode)) {
1174                         tmp_dev = st.st_dev;
1175                         tmp_ino = st.st_ino;
1176                 } else
1177                         tmp_dev = 0;
1178         }
1179 #endif
1180
1181 #ifdef HAVE_STRUCT_STAT_ST_RDEV
1182         if (IS_DEVICE(st.st_mode) || IS_SPECIAL(st.st_mode)) {
1183                 tmp_rdev = st.st_rdev;
1184                 st.st_size = 0;
1185         }
1186 #endif
1187
1188         file->flags = flags;
1189         file->modtime = st.st_mtime;
1190         file->len32 = (uint32)st.st_size;
1191         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
1192                 file->flags |= FLAG_LENGTH64;
1193                 OPT_EXTRA(file, 0)->unum = (uint32)(st.st_size >> 32);
1194         }
1195         file->mode = st.st_mode;
1196         if (uid_ndx)
1197                 F_OWNER(file) = st.st_uid;
1198         if (gid_ndx)
1199                 F_GROUP(file) = st.st_gid;
1200
1201         if (basename != thisname)
1202                 file->dirname = lastdir;
1203
1204 #ifdef SUPPORT_LINKS
1205         if (linkname_len) {
1206                 bp = (char*)file->basename + basename_len;
1207                 memcpy(bp, linkname, linkname_len);
1208         }
1209 #endif
1210
1211         if (always_checksum && am_sender && S_ISREG(st.st_mode))
1212                 file_checksum(thisname, tmp_sum, st.st_size);
1213
1214         F_PATHNAME(file) = pathname;
1215
1216         /* This code is only used by the receiver when it is building
1217          * a list of files for a delete pass. */
1218         if (keep_dirlinks && linkname_len && flist) {
1219                 STRUCT_STAT st2;
1220                 int save_mode = file->mode;
1221                 file->mode = S_IFDIR; /* Find a directory with our name. */
1222                 if (flist_find(dir_flist, file) >= 0
1223                  && x_stat(thisname, &st2, NULL) == 0 && S_ISDIR(st2.st_mode)) {
1224                         file->modtime = st2.st_mtime;
1225                         file->len32 = 0;
1226                         file->mode = st2.st_mode;
1227                         if (uid_ndx)
1228                                 F_OWNER(file) = st2.st_uid;
1229                         if (gid_ndx)
1230                                 F_GROUP(file) = st2.st_gid;
1231                 } else
1232                         file->mode = save_mode;
1233         }
1234
1235         if (basename_len == 0+1)
1236                 return NULL;
1237
1238         if (unsort_ndx)
1239                 F_NDX(file) = dir_count - 1;
1240
1241         return file;
1242 }
1243
1244 /* Only called for temporary file_struct entries created by make_file(). */
1245 void unmake_file(struct file_struct *file)
1246 {
1247         int extra_cnt = file_extra_cnt + LEN64_BUMP(file);
1248 #if EXTRA_ROUNDING > 0
1249         if (extra_cnt & EXTRA_ROUNDING)
1250                 extra_cnt = (extra_cnt | EXTRA_ROUNDING) + 1;
1251 #endif
1252         free(REQ_EXTRA(file, extra_cnt));
1253 }
1254
1255 static struct file_struct *send_file_name(int f, struct file_list *flist,
1256                                           char *fname, STRUCT_STAT *stp,
1257                                           int flags, int filter_level)
1258 {
1259         struct file_struct *file;
1260 #if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
1261         stat_x sx;
1262 #endif
1263
1264         file = make_file(fname, flist, stp, flags, filter_level);
1265         if (!file)
1266                 return NULL;
1267
1268         if (chmod_modes && !S_ISLNK(file->mode))
1269                 file->mode = tweak_mode(file->mode, chmod_modes);
1270
1271 #ifdef SUPPORT_ACLS
1272         if (preserve_acls && !S_ISLNK(file->mode) && f >= 0) {
1273                 sx.st.st_mode = file->mode;
1274                 sx.acc_acl = sx.def_acl = NULL;
1275                 if (get_acl(fname, &sx) < 0)
1276                         return NULL;
1277         }
1278 #endif
1279 #ifdef SUPPORT_XATTRS
1280         if (preserve_xattrs && f >= 0) {
1281                 sx.xattr = NULL;
1282                 if (get_xattr(fname, &sx) < 0)
1283                         return NULL;
1284         }
1285 #endif
1286
1287         maybe_emit_filelist_progress(flist->used + flist_count_offset);
1288
1289         flist_expand(flist, 1);
1290         flist->files[flist->used++] = file;
1291         if (f >= 0) {
1292                 send_file_entry(f, file, flist->used - 1, flist->ndx_start);
1293 #ifdef SUPPORT_ACLS
1294                 if (preserve_acls && !S_ISLNK(file->mode)) {
1295                         send_acl(&sx, f);
1296                         free_acl(&sx);
1297                 }
1298 #endif
1299 #ifdef SUPPORT_XATTRS
1300                 if (preserve_xattrs) {
1301                         F_XATTR(file) = send_xattr(&sx, f);
1302                         free_xattr(&sx);
1303                 }
1304 #endif
1305         }
1306         return file;
1307 }
1308
1309 static void send_if_directory(int f, struct file_list *flist,
1310                               struct file_struct *file,
1311                               char *fbuf, unsigned int ol,
1312                               int flags)
1313 {
1314         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1315
1316         if (S_ISDIR(file->mode)
1317             && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) {
1318                 void *save_filters;
1319                 unsigned int len = strlen(fbuf);
1320                 if (len > 1 && fbuf[len-1] == '/')
1321                         fbuf[--len] = '\0';
1322                 if (len >= MAXPATHLEN - 1) {
1323                         io_error |= IOERR_GENERAL;
1324                         rprintf(FERROR_XFER, "skipping long-named directory: %s\n",
1325                                 full_fname(fbuf));
1326                         return;
1327                 }
1328                 save_filters = push_local_filters(fbuf, len);
1329                 send_directory(f, flist, fbuf, len, flags);
1330                 pop_local_filters(save_filters);
1331                 fbuf[ol] = '\0';
1332                 if (is_dot_dir)
1333                         fbuf[ol-1] = '.';
1334         }
1335 }
1336
1337 static int file_compare(const void *file1, const void *file2)
1338 {
1339         return f_name_cmp(*(struct file_struct **)file1,
1340                           *(struct file_struct **)file2);
1341 }
1342
1343 /* The guts of a merge-sort algorithm.  This was derived from the glibc
1344  * version, but I (Wayne) changed the merge code to do less copying and
1345  * to require only half the amount of temporary memory. */
1346 static void fsort_tmp(struct file_struct **fp, size_t num,
1347                       struct file_struct **tmp)
1348 {
1349         struct file_struct **f1, **f2, **t;
1350         size_t n1, n2;
1351
1352         n1 = num / 2;
1353         n2 = num - n1;
1354         f1 = fp;
1355         f2 = fp + n1;
1356
1357         if (n1 > 1)
1358                 fsort_tmp(f1, n1, tmp);
1359         if (n2 > 1)
1360                 fsort_tmp(f2, n2, tmp);
1361
1362         while (f_name_cmp(*f1, *f2) <= 0) {
1363                 if (!--n1)
1364                         return;
1365                 f1++;
1366         }
1367
1368         t = tmp;
1369         memcpy(t, f1, n1 * PTR_SIZE);
1370
1371         *f1++ = *f2++, n2--;
1372
1373         while (n1 > 0 && n2 > 0) {
1374                 if (f_name_cmp(*t, *f2) <= 0)
1375                         *f1++ = *t++, n1--;
1376                 else
1377                         *f1++ = *f2++, n2--;
1378         }
1379
1380         if (n1 > 0)
1381                 memcpy(f1, t, n1 * PTR_SIZE);
1382 }
1383
1384 /* This file-struct sorting routine makes sure that any identical names in
1385  * the file list stay in the same order as they were in the original list.
1386  * This is particularly vital in inc_recurse mode where we expect a sort
1387  * on the flist to match the exact order of a sort on the dir_flist. */
1388 static void fsort(struct file_struct **fp, size_t num)
1389 {
1390         if (num <= 1)
1391                 return;
1392
1393         if (use_qsort)
1394                 qsort(fp, num, PTR_SIZE, file_compare);
1395         else {
1396                 struct file_struct **tmp = new_array(struct file_struct *,
1397                                                      (num+1) / 2);
1398                 fsort_tmp(fp, num, tmp);
1399                 free(tmp);
1400         }
1401 }
1402
1403 /* We take an entire set of sibling dirs from the sorted flist and link them
1404  * into the tree, setting the appropriate parent/child/sibling pointers. */
1405 static void add_dirs_to_tree(int parent_ndx, struct file_list *from_flist,
1406                              int dir_cnt)
1407 {
1408         int i;
1409         int32 *dp = NULL;
1410         int32 *parent_dp = parent_ndx < 0 ? NULL
1411                          : F_DIR_NODE_P(dir_flist->sorted[parent_ndx]);
1412
1413         flist_expand(dir_flist, dir_cnt);
1414         dir_flist->sorted = dir_flist->files;
1415
1416         for (i = 0; dir_cnt; i++) {
1417                 struct file_struct *file = from_flist->sorted[i];
1418
1419                 if (!S_ISDIR(file->mode))
1420                         continue;
1421
1422                 dir_flist->files[dir_flist->used++] = file;
1423                 dir_cnt--;
1424
1425                 if (file->basename[0] == '.' && file->basename[1] == '\0')
1426                         continue;
1427
1428                 if (dp)
1429                         DIR_NEXT_SIBLING(dp) = dir_flist->used - 1;
1430                 else if (parent_dp)
1431                         DIR_FIRST_CHILD(parent_dp) = dir_flist->used - 1;
1432                 else
1433                         send_dir_ndx = dir_flist->used - 1;
1434
1435                 dp = F_DIR_NODE_P(file);
1436                 DIR_PARENT(dp) = parent_ndx;
1437                 DIR_FIRST_CHILD(dp) = -1;
1438         }
1439         if (dp)
1440                 DIR_NEXT_SIBLING(dp) = -1;
1441 }
1442
1443 /* This function is normally called by the sender, but the receiving side also
1444  * calls it from get_dirlist() with f set to -1 so that we just construct the
1445  * file list in memory without sending it over the wire.  Also, get_dirlist()
1446  * might call this with f set to -2, which also indicates that local filter
1447  * rules should be ignored. */
1448 static void send_directory(int f, struct file_list *flist, char *fbuf, int len,
1449                            int flags)
1450 {
1451         struct dirent *di;
1452         unsigned remainder;
1453         char *p;
1454         DIR *d;
1455         int divert_dirs = (flags & FLAG_DIVERT_DIRS) != 0;
1456         int start = flist->used;
1457         int filter_level = f == -2 ? SERVER_FILTERS : ALL_FILTERS;
1458
1459         assert(flist != NULL);
1460
1461         if (!(d = opendir(fbuf))) {
1462                 io_error |= IOERR_GENERAL;
1463                 rsyserr(FERROR_XFER, errno, "opendir %s failed", full_fname(fbuf));
1464                 return;
1465         }
1466
1467         p = fbuf + len;
1468         if (len != 1 || *fbuf != '/')
1469                 *p++ = '/';
1470         *p = '\0';
1471         remainder = MAXPATHLEN - (p - fbuf);
1472
1473         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1474                 char *dname = d_name(di);
1475                 if (dname[0] == '.' && (dname[1] == '\0'
1476                     || (dname[1] == '.' && dname[2] == '\0')))
1477                         continue;
1478                 if (strlcpy(p, dname, remainder) >= remainder) {
1479                         io_error |= IOERR_GENERAL;
1480                         rprintf(FINFO,
1481                                 "cannot send long-named file %s\n",
1482                                 full_fname(fbuf));
1483                         continue;
1484                 }
1485                 if (dname[0] == '\0') {
1486                         io_error |= IOERR_GENERAL;
1487                         rprintf(FINFO,
1488                                 "cannot send file with empty name in %s\n",
1489                                 full_fname(fbuf));
1490                         continue;
1491                 }
1492
1493                 send_file_name(f, flist, fbuf, NULL, flags, filter_level);
1494         }
1495
1496         fbuf[len] = '\0';
1497
1498         if (errno) {
1499                 io_error |= IOERR_GENERAL;
1500                 rsyserr(FERROR_XFER, errno, "readdir(%s)", full_fname(fbuf));
1501         }
1502
1503         closedir(d);
1504
1505         if (f >= 0 && recurse && !divert_dirs) {
1506                 int i, end = flist->used - 1;
1507                 /* send_if_directory() bumps flist->used, so use "end". */
1508                 for (i = start; i <= end; i++)
1509                         send_if_directory(f, flist, flist->files[i], fbuf, len, flags);
1510         }
1511 }
1512
1513 static char lastpath[MAXPATHLEN] = "";
1514 static int lastpath_len = 0;
1515 static struct file_struct *lastpath_struct;
1516
1517 static void send_implied_dirs(int f, struct file_list *flist, char *fname,
1518                               char *start, char *limit, int flags, char name_type)
1519 {
1520         struct file_struct *file;
1521         item_list *relname_list;
1522         relnamecache **rnpp;
1523         char *slash;
1524         int len, need_new_dir;
1525
1526         flags = (flags | FLAG_IMPLIED_DIR) & ~(FLAG_TOP_DIR | FLAG_CONTENT_DIR);
1527
1528         if (inc_recurse) {
1529                 if (lastpath_struct && F_PATHNAME(lastpath_struct) == pathname
1530                  && lastpath_len == limit - fname
1531                  && strncmp(lastpath, fname, lastpath_len) == 0)
1532                         need_new_dir = 0;
1533                 else
1534                         need_new_dir = 1;
1535         } else
1536                 need_new_dir = 1;
1537
1538         if (need_new_dir) {
1539                 int save_copy_links = copy_links;
1540                 int save_xfer_dirs = xfer_dirs;
1541
1542                 copy_links = xfer_dirs = 1;
1543
1544                 *limit = '\0';
1545
1546                 for (slash = start; (slash = strchr(slash+1, '/')) != NULL; ) {
1547                         *slash = '\0';
1548                         send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1549                         *slash = '/';
1550                 }
1551
1552                 file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1553                 if (inc_recurse) {
1554                         if (file && !S_ISDIR(file->mode))
1555                                 file = NULL;
1556                         lastpath_struct = file;
1557                 }
1558
1559                 strlcpy(lastpath, fname, sizeof lastpath);
1560                 lastpath_len = limit - fname;
1561
1562                 *limit = '/';
1563
1564                 copy_links = save_copy_links;
1565                 xfer_dirs = save_xfer_dirs;
1566
1567                 if (!inc_recurse)
1568                         return;
1569         }
1570
1571         if (!lastpath_struct)
1572                 return; /* dir must have vanished */
1573
1574         len = strlen(limit+1);
1575         memcpy(&relname_list, F_DIR_RELNAMES_P(lastpath_struct), sizeof relname_list);
1576         if (!relname_list) {
1577                 if (!(relname_list = new0(item_list)))
1578                         out_of_memory("send_implied_dirs");
1579                 memcpy(F_DIR_RELNAMES_P(lastpath_struct), &relname_list, sizeof relname_list);
1580         }
1581         rnpp = EXPAND_ITEM_LIST(relname_list, relnamecache *, 32);
1582         if (!(*rnpp = (relnamecache*)new_array(char, sizeof (relnamecache) + len)))
1583                 out_of_memory("send_implied_dirs");
1584         (*rnpp)->name_type = name_type;
1585         strlcpy((*rnpp)->fname, limit+1, len + 1);
1586 }
1587
1588 static void send1extra(int f, struct file_struct *file, struct file_list *flist)
1589 {
1590         char fbuf[MAXPATHLEN];
1591         item_list *relname_list;
1592         int len, dlen, flags = FLAG_DIVERT_DIRS | FLAG_CONTENT_DIR;
1593         size_t j;
1594
1595         f_name(file, fbuf);
1596         dlen = strlen(fbuf);
1597
1598         if (F_PATHNAME(file) != pathname) {
1599                 if (!push_pathname(F_PATHNAME(file), -1))
1600                         exit_cleanup(RERR_FILESELECT);
1601         }
1602
1603         change_local_filter_dir(fbuf, dlen, send_dir_depth);
1604
1605         if (file->flags & FLAG_CONTENT_DIR) {
1606                 if (one_file_system) {
1607                         STRUCT_STAT st;
1608                         if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1609                                 io_error |= IOERR_GENERAL;
1610                                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1611                                         full_fname(fbuf));
1612                                 return;
1613                         }
1614                         filesystem_dev = st.st_dev;
1615                 }
1616                 send_directory(f, flist, fbuf, dlen, flags);
1617         }
1618
1619         if (!relative_paths)
1620                 return;
1621
1622         memcpy(&relname_list, F_DIR_RELNAMES_P(file), sizeof relname_list);
1623         if (!relname_list)
1624                 return;
1625
1626         for (j = 0; j < relname_list->count; j++) {
1627                 char *slash;
1628                 relnamecache *rnp = ((relnamecache**)relname_list->items)[j];
1629                 char name_type = rnp->name_type;
1630
1631                 fbuf[dlen] = '/';
1632                 len = strlcpy(fbuf + dlen + 1, rnp->fname, sizeof fbuf - dlen - 1);
1633                 free(rnp);
1634                 if (len >= (int)sizeof fbuf)
1635                         continue; /* Impossible... */
1636
1637                 slash = strchr(fbuf+dlen+1, '/');
1638                 if (slash) {
1639                         send_implied_dirs(f, flist, fbuf, fbuf+dlen+1, slash, flags, name_type);
1640                         continue;
1641                 }
1642
1643                 if (name_type != NORMAL_NAME) {
1644                         STRUCT_STAT st;
1645                         if (link_stat(fbuf, &st, 1) != 0) {
1646                                 io_error |= IOERR_GENERAL;
1647                                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1648                                         full_fname(fbuf));
1649                                 continue;
1650                         }
1651                         send_file_name(f, flist, fbuf, &st, FLAG_TOP_DIR | flags, ALL_FILTERS);
1652                 } else
1653                         send_file_name(f, flist, fbuf, NULL, FLAG_TOP_DIR | flags, ALL_FILTERS);
1654         }
1655
1656         free(relname_list);
1657 }
1658
1659 void send_extra_file_list(int f, int at_least)
1660 {
1661         struct file_list *flist;
1662         int64 start_write;
1663         uint16 prev_flags;
1664         int old_cnt, save_io_error = io_error;
1665
1666         if (flist_eof)
1667                 return;
1668
1669         /* Keep sending data until we have the requested number of
1670          * files in the upcoming file-lists. */
1671         old_cnt = cur_flist->used;
1672         for (flist = first_flist; flist != cur_flist; flist = flist->next)
1673                 old_cnt += flist->used;
1674         while (file_total - old_cnt < at_least) {
1675                 struct file_struct *file = dir_flist->sorted[send_dir_ndx];
1676                 int dir_ndx, dstart = dir_count;
1677                 const char *pathname = F_PATHNAME(file);
1678                 int32 *dp;
1679
1680                 flist = flist_new(0, "send_extra_file_list");
1681                 start_write = stats.total_written;
1682
1683                 if (unsort_ndx)
1684                         dir_ndx = F_NDX(file);
1685                 else
1686                         dir_ndx = send_dir_ndx;
1687                 write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
1688                 flist->parent_ndx = dir_ndx;
1689
1690                 send1extra(f, file, flist);
1691                 prev_flags = file->flags;
1692                 dp = F_DIR_NODE_P(file);
1693
1694                 /* If there are any duplicate directory names that follow, we
1695                  * send all the dirs together in one file-list.  The dir_flist
1696                  * tree links all the child subdirs onto the last dup dir. */
1697                 while ((dir_ndx = DIR_NEXT_SIBLING(dp)) >= 0
1698                     && dir_flist->sorted[dir_ndx]->flags & FLAG_DUPLICATE) {
1699                         send_dir_ndx = dir_ndx;
1700                         file = dir_flist->sorted[dir_ndx];
1701                         /* Try to avoid some duplicate scanning of identical dirs. */
1702                         if (F_PATHNAME(file) == pathname && prev_flags & FLAG_CONTENT_DIR)
1703                                 file->flags &= ~FLAG_CONTENT_DIR;
1704                         send1extra(f, file, flist);
1705                         prev_flags = file->flags;
1706                         dp = F_DIR_NODE_P(file);
1707                 }
1708
1709                 write_byte(f, 0);
1710
1711                 if (need_unsorted_flist) {
1712                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
1713                                 out_of_memory("send_extra_file_list");
1714                         memcpy(flist->sorted, flist->files,
1715                                flist->used * sizeof (struct file_struct*));
1716                 } else
1717                         flist->sorted = flist->files;
1718
1719                 clean_flist(flist, 0);
1720
1721                 flist->ndx_end = flist->ndx_start + flist->used - 1;
1722                 if (!need_unsorted_flist)
1723                         flist->ndx_end -= (dir_count - dstart);
1724
1725                 add_dirs_to_tree(send_dir_ndx, flist, dir_count - dstart);
1726                 flist_done_allocating(flist);
1727
1728                 file_total += flist->used;
1729                 stats.flist_size += stats.total_written - start_write;
1730                 stats.num_files += flist->used;
1731                 if (verbose > 3)
1732                         output_flist(flist);
1733
1734                 if (DIR_FIRST_CHILD(dp) >= 0) {
1735                         send_dir_ndx = DIR_FIRST_CHILD(dp);
1736                         send_dir_depth++;
1737                 } else {
1738                         while (DIR_NEXT_SIBLING(dp) < 0) {
1739                                 if ((send_dir_ndx = DIR_PARENT(dp)) < 0) {
1740                                         write_ndx(f, NDX_FLIST_EOF);
1741                                         flist_eof = 1;
1742                                         change_local_filter_dir(NULL, 0, 0);
1743                                         goto finish;
1744                                 }
1745                                 send_dir_depth--;
1746                                 file = dir_flist->sorted[send_dir_ndx];
1747                                 dp = F_DIR_NODE_P(file);
1748                         }
1749                         send_dir_ndx = DIR_NEXT_SIBLING(dp);
1750                 }
1751         }
1752
1753   finish:
1754         if (io_error != save_io_error && !ignore_errors)
1755                 send_msg_int(MSG_IO_ERROR, io_error);
1756 }
1757
1758 struct file_list *send_file_list(int f, int argc, char *argv[])
1759 {
1760         static const char *lastdir;
1761         static int lastdir_len = -1;
1762         int len, dirlen;
1763         STRUCT_STAT st;
1764         char *p, *dir;
1765         struct file_list *flist;
1766         struct timeval start_tv, end_tv;
1767         int64 start_write;
1768         int use_ff_fd = 0;
1769         int disable_buffering;
1770         int flags = recurse ? FLAG_CONTENT_DIR : 0;
1771         int reading_remotely = filesfrom_host != NULL;
1772         int rl_flags = (reading_remotely ? 0 : RL_DUMP_COMMENTS)
1773 #ifdef ICONV_OPTION
1774                      | (filesfrom_convert ? RL_CONVERT : 0)
1775 #endif
1776                      | (eol_nulls || reading_remotely ? RL_EOL_NULLS : 0);
1777
1778         rprintf(FLOG, "building file list\n");
1779         if (show_filelist_p())
1780                 start_filelist_progress("building file list");
1781         else if (inc_recurse && verbose && !am_server)
1782                 rprintf(FCLIENT, "sending incremental file list\n");
1783
1784         start_write = stats.total_written;
1785         gettimeofday(&start_tv, NULL);
1786
1787         if (relative_paths && protocol_version >= 30)
1788                 implied_dirs = 1; /* We send flagged implied dirs */
1789
1790 #ifdef SUPPORT_HARD_LINKS
1791         if (preserve_hard_links && protocol_version >= 30 && !cur_flist)
1792                 init_hard_links();
1793 #endif
1794
1795         flist = cur_flist = flist_new(0, "send_file_list");
1796         if (inc_recurse) {
1797                 dir_flist = flist_new(FLIST_TEMP, "send_file_list");
1798                 flags |= FLAG_DIVERT_DIRS;
1799         } else
1800                 dir_flist = cur_flist;
1801
1802         disable_buffering = io_start_buffering_out(f);
1803         if (filesfrom_fd >= 0) {
1804                 if (argv[0] && !push_dir(argv[0], 0)) {
1805                         rsyserr(FERROR_XFER, errno, "push_dir %s failed in %s",
1806                                 full_fname(argv[0]), curr_dir);
1807                         exit_cleanup(RERR_FILESELECT);
1808                 }
1809                 use_ff_fd = 1;
1810         }
1811
1812         while (1) {
1813                 char fbuf[MAXPATHLEN], *fn, name_type;
1814
1815                 if (use_ff_fd) {
1816                         if (read_line(filesfrom_fd, fbuf, sizeof fbuf, rl_flags) == 0)
1817                                 break;
1818                         sanitize_path(fbuf, fbuf, "", 0);
1819                 } else {
1820                         if (argc-- == 0)
1821                                 break;
1822                         strlcpy(fbuf, *argv++, MAXPATHLEN);
1823                         if (sanitize_paths)
1824                                 sanitize_path(fbuf, fbuf, "", 0);
1825                 }
1826
1827                 len = strlen(fbuf);
1828                 if (relative_paths) {
1829                         /* We clean up fbuf below. */
1830                         name_type = NORMAL_NAME;
1831                 } else if (!len || fbuf[len - 1] == '/') {
1832                         if (len == 2 && fbuf[0] == '.') {
1833                                 /* Turn "./" into just "." rather than "./." */
1834                                 fbuf[1] = '\0';
1835                         } else {
1836                                 if (len + 1 >= MAXPATHLEN)
1837                                         overflow_exit("send_file_list");
1838                                 fbuf[len++] = '.';
1839                                 fbuf[len] = '\0';
1840                         }
1841                         name_type = DOT_NAME;
1842                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
1843                     && (len == 2 || fbuf[len-3] == '/')) {
1844                         if (len + 2 >= MAXPATHLEN)
1845                                 overflow_exit("send_file_list");
1846                         fbuf[len++] = '/';
1847                         fbuf[len++] = '.';
1848                         fbuf[len] = '\0';
1849                         name_type = DOT_NAME;
1850                 } else if (fbuf[len-1] == '.' && (len == 1 || fbuf[len-2] == '/'))
1851                         name_type = DOT_NAME;
1852                 else
1853                         name_type = NORMAL_NAME;
1854
1855                 dir = NULL;
1856
1857                 if (!relative_paths) {
1858                         p = strrchr(fbuf, '/');
1859                         if (p) {
1860                                 *p = '\0';
1861                                 if (p == fbuf)
1862                                         dir = "/";
1863                                 else
1864                                         dir = fbuf;
1865                                 len -= p - fbuf + 1;
1866                                 fn = p + 1;
1867                         } else
1868                                 fn = fbuf;
1869                 } else {
1870                         if ((p = strstr(fbuf, "/./")) != NULL) {
1871                                 *p = '\0';
1872                                 if (p == fbuf)
1873                                         dir = "/";
1874                                 else
1875                                         dir = fbuf;
1876                                 fn = p + 3;
1877                                 while (*fn == '/')
1878                                         fn++;
1879                                 if (!*fn)
1880                                         *--fn = '\0'; /* ensure room for '.' */
1881                         } else
1882                                 fn = fbuf;
1883                         len = clean_fname(fn, CFN_KEEP_LEADING_DOT_DIR
1884                                             | CFN_KEEP_TRAILING_SLASH
1885                                             | CFN_DROP_TRAILING_DOT_DIR);
1886                         if (len == 1) {
1887                                 if (fn[0] == '/') {
1888                                         fn = "/.";
1889                                         len = 2;
1890                                         name_type = DOT_NAME;
1891                                 } else if (fn[0] == '.')
1892                                         name_type = DOT_NAME;
1893                         } else if (fn[len-1] == '/') {
1894                                 fn[--len] = '\0';
1895                                 if (len == 1 && *fn == '.')
1896                                         name_type = DOT_NAME;
1897                                 else
1898                                         name_type = SLASH_ENDING_NAME;
1899                         }
1900                         /* Reject a ".." dir in the active part of the path. */
1901                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
1902                                 if ((p[2] == '/' || p[2] == '\0')
1903                                  && (p == fn || p[-1] == '/')) {
1904                                         rprintf(FERROR,
1905                                             "found \"..\" dir in relative path: %s\n",
1906                                             fn);
1907                                         exit_cleanup(RERR_SYNTAX);
1908                                 }
1909                         }
1910                 }
1911
1912                 if (!*fn) {
1913                         len = 1;
1914                         fn = ".";
1915                         name_type = DOT_NAME;
1916                 }
1917
1918                 dirlen = dir ? strlen(dir) : 0;
1919                 if (dirlen != lastdir_len || memcmp(lastdir, dir, dirlen) != 0) {
1920                         if (!push_pathname(dir ? strdup(dir) : NULL, dirlen))
1921                                 continue;
1922                         lastdir = pathname;
1923                         lastdir_len = pathname_len;
1924                 } else if (!push_pathname(lastdir, lastdir_len))
1925                         continue;
1926
1927                 if (fn != fbuf)
1928                         memmove(fbuf, fn, len + 1);
1929
1930                 if (link_stat(fbuf, &st, copy_dirlinks || name_type != NORMAL_NAME) != 0) {
1931                         io_error |= IOERR_GENERAL;
1932                         rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1933                                 full_fname(fbuf));
1934                         continue;
1935                 }
1936
1937                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
1938                         rprintf(FINFO, "skipping directory %s\n", fbuf);
1939                         continue;
1940                 }
1941
1942                 if (inc_recurse && relative_paths && *fbuf) {
1943                         if ((p = strchr(fbuf+1, '/')) != NULL) {
1944                                 if (p - fbuf == 1 && *fbuf == '.') {
1945                                         if ((fn = strchr(p+1, '/')) != NULL)
1946                                                 p = fn;
1947                                 } else
1948                                         fn = p;
1949                                 send_implied_dirs(f, flist, fbuf, fbuf, p, flags, name_type);
1950                                 if (fn == p)
1951                                         continue;
1952                         }
1953                 } else if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
1954                         /* Send the implied directories at the start of the
1955                          * source spec, so we get their permissions right. */
1956                         char *lp = lastpath, *slash = fbuf;
1957                         *p = '\0';
1958                         /* Skip any initial directories in our path that we
1959                          * have in common with lastpath. */
1960                         for (fn = fbuf; *fn && *lp == *fn; lp++, fn++) {
1961                                 if (*fn == '/')
1962                                         slash = fn;
1963                         }
1964                         *p = '/';
1965                         if (fn != p || (*lp && *lp != '/'))
1966                                 send_implied_dirs(f, flist, fbuf, slash, p, flags, 0);
1967                 }
1968
1969                 if (one_file_system)
1970                         filesystem_dev = st.st_dev;
1971
1972                 if (recurse || (xfer_dirs && name_type != NORMAL_NAME)) {
1973                         struct file_struct *file;
1974                         int top_flags = FLAG_TOP_DIR | FLAG_CONTENT_DIR | flags;
1975                         file = send_file_name(f, flist, fbuf, &st,
1976                                               top_flags, ALL_FILTERS);
1977                         if (inc_recurse) {
1978                                 if (name_type == DOT_NAME) {
1979                                         if (send_dir_depth < 0) {
1980                                                 send_dir_depth = 0;
1981                                                 change_local_filter_dir(fbuf, len, send_dir_depth);
1982                                         }
1983                                         send_directory(f, flist, fbuf, len, flags);
1984                                 }
1985                         } else if (file)
1986                                 send_if_directory(f, flist, file, fbuf, len, flags);
1987                 } else
1988                         send_file_name(f, flist, fbuf, &st, flags, ALL_FILTERS);
1989         }
1990
1991         gettimeofday(&end_tv, NULL);
1992         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
1993                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
1994         if (stats.flist_buildtime == 0)
1995                 stats.flist_buildtime = 1;
1996         start_tv = end_tv;
1997
1998         write_byte(f, 0); /* Indicate end of file list */
1999
2000 #ifdef SUPPORT_HARD_LINKS
2001         if (preserve_hard_links && protocol_version >= 30 && !inc_recurse)
2002                 idev_destroy();
2003 #endif
2004
2005         if (show_filelist_p())
2006                 finish_filelist_progress(flist);
2007
2008         gettimeofday(&end_tv, NULL);
2009         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2010                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2011
2012         /* When converting names, both sides keep an unsorted file-list array
2013          * because the names will differ on the sending and receiving sides
2014          * (both sides will use the unsorted index number for each item). */
2015
2016         /* Sort the list without removing any duplicates.  This allows the
2017          * receiving side to ask for whatever name it kept.  For incremental
2018          * recursion mode, the sender marks duplicate dirs so that it can
2019          * send them together in a single file-list. */
2020         if (need_unsorted_flist) {
2021                 if (inc_recurse) {
2022                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2023                                 out_of_memory("send_file_list");
2024                         memcpy(flist->sorted, flist->files,
2025                                flist->used * sizeof (struct file_struct*));
2026                         clean_flist(flist, 0);
2027                 } else {
2028                         flist->sorted = flist->files;
2029                         flist->low = 0;
2030                         flist->high = flist->used - 1;
2031                 }
2032         } else {
2033                 flist->sorted = flist->files;
2034                 clean_flist(flist, 0);
2035         }
2036         file_total += flist->used;
2037
2038         /* We don't subtract dir_count for the first send since we
2039          * might have one or more dot dirs which need to get sent. */
2040         flist->ndx_end = flist->ndx_start + flist->used - 1;
2041
2042         if (!numeric_ids && !inc_recurse)
2043                 send_id_list(f);
2044
2045         /* send the io_error flag */
2046         if (protocol_version < 30)
2047                 write_int(f, ignore_errors ? 0 : io_error);
2048         else if (io_error && !ignore_errors)
2049                 send_msg_int(MSG_IO_ERROR, io_error);
2050
2051         if (disable_buffering)
2052                 io_end_buffering_out();
2053
2054         stats.flist_size = stats.total_written - start_write;
2055         stats.num_files = flist->used;
2056
2057         if (verbose > 3)
2058                 output_flist(flist);
2059
2060         if (verbose > 2)
2061                 rprintf(FINFO, "send_file_list done\n");
2062
2063         if (inc_recurse) {
2064                 send_dir_depth = 1;
2065                 add_dirs_to_tree(-1, flist, dir_count);
2066                 if (!file_total || strcmp(flist->sorted[0]->basename, ".") != 0)
2067                         flist->parent_ndx = -1;
2068                 flist_done_allocating(flist);
2069                 if (send_dir_ndx < 0) {
2070                         write_ndx(f, NDX_FLIST_EOF);
2071                         flist_eof = 1;
2072                 }
2073                 else if (file_total == 1) {
2074                         /* If we're creating incremental file-lists and there
2075                          * was just 1 item in the first file-list, send 1 more
2076                          * file-list to check if this is a 1-file xfer. */
2077                         send_extra_file_list(f, 1);
2078                 }
2079         }
2080
2081         return flist;
2082 }
2083
2084 struct file_list *recv_file_list(int f)
2085 {
2086         struct file_list *flist;
2087         int dstart, flags;
2088         int64 start_read;
2089
2090         if (!first_flist)
2091                 rprintf(FLOG, "receiving file list\n");
2092         if (show_filelist_p())
2093                 start_filelist_progress("receiving file list");
2094         else if (inc_recurse && verbose && !am_server && !first_flist)
2095                 rprintf(FCLIENT, "receiving incremental file list\n");
2096
2097         start_read = stats.total_read;
2098
2099 #ifdef SUPPORT_HARD_LINKS
2100         if (preserve_hard_links && !first_flist)
2101                 init_hard_links();
2102 #endif
2103
2104         flist = flist_new(0, "recv_file_list");
2105
2106         if (inc_recurse) {
2107                 if (flist->ndx_start == 1)
2108                         dir_flist = flist_new(FLIST_TEMP, "recv_file_list");
2109                 dstart = dir_flist->used;
2110         } else {
2111                 dir_flist = flist;
2112                 dstart = 0;
2113         }
2114
2115         while ((flags = read_byte(f)) != 0) {
2116                 struct file_struct *file;
2117
2118                 flist_expand(flist, 1);
2119
2120                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
2121                         flags |= read_byte(f) << 8;
2122                 file = recv_file_entry(flist, flags, f);
2123
2124                 if (inc_recurse && S_ISDIR(file->mode)) {
2125                         flist_expand(dir_flist, 1);
2126                         dir_flist->files[dir_flist->used++] = file;
2127                 }
2128
2129                 flist->files[flist->used++] = file;
2130
2131                 maybe_emit_filelist_progress(flist->used);
2132
2133                 if (verbose > 2) {
2134                         rprintf(FINFO, "recv_file_name(%s)\n",
2135                                 f_name(file, NULL));
2136                 }
2137         }
2138         file_total += flist->used;
2139
2140         flist->ndx_end = flist->ndx_start + flist->used - 1;
2141         if (inc_recurse && !need_unsorted_flist && flist->ndx_start > 1)
2142                 flist->ndx_end -= dir_flist->used - dstart;
2143
2144         if (verbose > 2)
2145                 rprintf(FINFO, "received %d names\n", flist->used);
2146
2147         if (show_filelist_p())
2148                 finish_filelist_progress(flist);
2149
2150         if (need_unsorted_flist) {
2151                 /* Create an extra array of index pointers that we can sort for
2152                  * the generator's use (for wading through the files in sorted
2153                  * order and for calling flist_find()).  We keep the "files"
2154                  * list unsorted for our exchange of index numbers with the
2155                  * other side (since their names may not sort the same). */
2156                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2157                         out_of_memory("recv_file_list");
2158                 memcpy(flist->sorted, flist->files,
2159                        flist->used * sizeof (struct file_struct*));
2160                 if (inc_recurse && dir_flist->used > dstart) {
2161                         dir_flist->sorted = realloc_array(dir_flist->sorted,
2162                                                 struct file_struct *,
2163                                                 dir_flist->used);
2164                         memcpy(dir_flist->sorted + dstart, dir_flist->files + dstart,
2165                                (dir_flist->used - dstart) * sizeof (struct file_struct*));
2166                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2167                 }
2168         } else {
2169                 flist->sorted = flist->files;
2170                 if (inc_recurse && dir_flist->used > dstart) {
2171                         dir_flist->sorted = dir_flist->files;
2172                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2173                 }
2174         }
2175
2176         if (inc_recurse)
2177                 flist_done_allocating(flist);
2178         else if (f >= 0)
2179                 recv_id_list(f, flist);
2180
2181         clean_flist(flist, relative_paths);
2182
2183         if (protocol_version < 30) {
2184                 /* Recv the io_error flag */
2185                 if (ignore_errors)
2186                         read_int(f);
2187                 else
2188                         io_error |= read_int(f);
2189         } else if (inc_recurse && flist->ndx_start == 1) {
2190                 if (!file_total || strcmp(flist->sorted[0]->basename, ".") != 0)
2191                         flist->parent_ndx = -1;
2192         }
2193
2194         if (verbose > 3)
2195                 output_flist(flist);
2196
2197         if (verbose > 2)
2198                 rprintf(FINFO, "recv_file_list done\n");
2199
2200         stats.flist_size += stats.total_read - start_read;
2201         stats.num_files += flist->used;
2202
2203         return flist;
2204 }
2205
2206 /* This is only used once by the receiver if the very first file-list
2207  * has exactly one item in it. */
2208 void recv_additional_file_list(int f)
2209 {
2210         struct file_list *flist;
2211         int ndx = read_ndx(f);
2212         if (ndx == NDX_FLIST_EOF) {
2213                 flist_eof = 1;
2214                 change_local_filter_dir(NULL, 0, 0);
2215         } else {
2216                 ndx = NDX_FLIST_OFFSET - ndx;
2217                 if (ndx < 0 || ndx >= dir_flist->used) {
2218                         ndx = NDX_FLIST_OFFSET - ndx;
2219                         rprintf(FERROR,
2220                                 "[%s] Invalid dir index: %d (%d - %d)\n",
2221                                 who_am_i(), ndx, NDX_FLIST_OFFSET,
2222                                 NDX_FLIST_OFFSET - dir_flist->used + 1);
2223                         exit_cleanup(RERR_PROTOCOL);
2224                 }
2225                 if (verbose > 3) {
2226                         rprintf(FINFO, "[%s] receiving flist for dir %d\n",
2227                                 who_am_i(), ndx);
2228                 }
2229                 flist = recv_file_list(f);
2230                 flist->parent_ndx = ndx;
2231         }
2232 }
2233
2234 /* Search for an identically-named item in the file list.  Note that the
2235  * items must agree in their directory-ness, or no match is returned. */
2236 int flist_find(struct file_list *flist, struct file_struct *f)
2237 {
2238         int low = flist->low, high = flist->high;
2239         int diff, mid, mid_up;
2240
2241         while (low <= high) {
2242                 mid = (low + high) / 2;
2243                 if (F_IS_ACTIVE(flist->sorted[mid]))
2244                         mid_up = mid;
2245                 else {
2246                         /* Scan for the next non-empty entry using the cached
2247                          * distance values.  If the value isn't fully up-to-
2248                          * date, update it. */
2249                         mid_up = mid + F_DEPTH(flist->sorted[mid]);
2250                         if (!F_IS_ACTIVE(flist->sorted[mid_up])) {
2251                                 do {
2252                                     mid_up += F_DEPTH(flist->sorted[mid_up]);
2253                                 } while (!F_IS_ACTIVE(flist->sorted[mid_up]));
2254                                 F_DEPTH(flist->sorted[mid]) = mid_up - mid;
2255                         }
2256                         if (mid_up > high) {
2257                                 /* If there's nothing left above us, set high to
2258                                  * a non-empty entry below us and continue. */
2259                                 high = mid - (int)flist->sorted[mid]->len32;
2260                                 if (!F_IS_ACTIVE(flist->sorted[high])) {
2261                                         do {
2262                                             high -= (int)flist->sorted[high]->len32;
2263                                         } while (!F_IS_ACTIVE(flist->sorted[high]));
2264                                         flist->sorted[mid]->len32 = mid - high;
2265                                 }
2266                                 continue;
2267                         }
2268                 }
2269                 diff = f_name_cmp(flist->sorted[mid_up], f);
2270                 if (diff == 0) {
2271                         if (protocol_version < 29
2272                             && S_ISDIR(flist->sorted[mid_up]->mode)
2273                             != S_ISDIR(f->mode))
2274                                 return -1;
2275                         return mid_up;
2276                 }
2277                 if (diff < 0)
2278                         low = mid_up + 1;
2279                 else
2280                         high = mid - 1;
2281         }
2282         return -1;
2283 }
2284
2285 /*
2286  * Free up any resources a file_struct has allocated
2287  * and clear the file.
2288  */
2289 void clear_file(struct file_struct *file)
2290 {
2291         /* The +1 zeros out the first char of the basename. */
2292         memset(file, 0, FILE_STRUCT_LEN + 1);
2293         /* In an empty entry, F_DEPTH() is an offset to the next non-empty
2294          * entry.  Likewise for len32 in the opposite direction.  We assume
2295          * that we're alone for now since flist_find() will adjust the counts
2296          * it runs into that aren't up-to-date. */
2297         file->len32 = F_DEPTH(file) = 1;
2298 }
2299
2300 /* Allocate a new file list. */
2301 struct file_list *flist_new(int flags, char *msg)
2302 {
2303         struct file_list *flist;
2304
2305         if (!(flist = new0(struct file_list)))
2306                 out_of_memory(msg);
2307
2308         if (flags & FLIST_TEMP) {
2309                 if (!(flist->file_pool = pool_create(SMALL_EXTENT, 0,
2310                                                 out_of_memory, POOL_INTERN)))
2311                         out_of_memory(msg);
2312         } else {
2313                 /* This is a doubly linked list with prev looping back to
2314                  * the end of the list, but the last next pointer is NULL. */
2315                 if (!first_flist) {
2316                         flist->file_pool = pool_create(NORMAL_EXTENT, 0,
2317                                                 out_of_memory, POOL_INTERN);
2318                         if (!flist->file_pool)
2319                                 out_of_memory(msg);
2320
2321                         flist->ndx_start = inc_recurse ? 1 : 0;
2322
2323                         first_flist = cur_flist = flist->prev = flist;
2324                 } else {
2325                         flist->file_pool = first_flist->file_pool;
2326
2327                         flist->ndx_start = first_flist->prev->ndx_end + 2;
2328                         if (flist->ndx_start <= high_hlink_ndx)
2329                                 flist->ndx_start = high_hlink_ndx + 1;
2330
2331                         flist->prev = first_flist->prev;
2332                         flist->prev->next = first_flist->prev = flist;
2333                 }
2334                 flist->pool_boundary = pool_boundary(flist->file_pool, 0);
2335                 flist_cnt++;
2336         }
2337
2338         return flist;
2339 }
2340
2341 /* Free up all elements in a flist. */
2342 void flist_free(struct file_list *flist)
2343 {
2344         if (!flist->prev) {
2345                 /* Was FLIST_TEMP dir-list. */
2346         } else if (flist == flist->prev) {
2347                 first_flist = cur_flist = NULL;
2348                 file_total = 0;
2349                 flist_cnt = 0;
2350         } else {
2351                 if (flist == cur_flist)
2352                         cur_flist = flist->next;
2353                 if (flist == first_flist)
2354                         first_flist = first_flist->next;
2355                 else {
2356                         flist->prev->next = flist->next;
2357                         if (!flist->next)
2358                                 flist->next = first_flist;
2359                 }
2360                 flist->next->prev = flist->prev;
2361                 file_total -= flist->used;
2362                 flist_cnt--;
2363         }
2364
2365         if (!flist->prev || !flist_cnt)
2366                 pool_destroy(flist->file_pool);
2367         else
2368                 pool_free_old(flist->file_pool, flist->pool_boundary);
2369
2370         if (flist->sorted && flist->sorted != flist->files)
2371                 free(flist->sorted);
2372         free(flist->files);
2373         free(flist);
2374 }
2375
2376 /* This routine ensures we don't have any duplicate names in our file list.
2377  * duplicate names can cause corruption because of the pipelining. */
2378 static void clean_flist(struct file_list *flist, int strip_root)
2379 {
2380         char fbuf[MAXPATHLEN];
2381         int i, prev_i;
2382
2383         if (!flist)
2384                 return;
2385         if (flist->used == 0) {
2386                 flist->high = -1;
2387                 flist->low = 0;
2388                 return;
2389         }
2390
2391         fsort(flist->sorted, flist->used);
2392
2393         if (!am_sender || inc_recurse) {
2394                 for (i = prev_i = 0; i < flist->used; i++) {
2395                         if (F_IS_ACTIVE(flist->sorted[i])) {
2396                                 prev_i = i;
2397                                 break;
2398                         }
2399                 }
2400                 flist->low = prev_i;
2401         } else {
2402                 i = prev_i = flist->used - 1;
2403                 flist->low = 0;
2404         }
2405
2406         while (++i < flist->used) {
2407                 int j;
2408                 struct file_struct *file = flist->sorted[i];
2409
2410                 if (!F_IS_ACTIVE(file))
2411                         continue;
2412                 if (f_name_cmp(file, flist->sorted[prev_i]) == 0)
2413                         j = prev_i;
2414                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
2415                         int save_mode = file->mode;
2416                         /* Make sure that this directory doesn't duplicate a
2417                          * non-directory earlier in the list. */
2418                         flist->high = prev_i;
2419                         file->mode = S_IFREG;
2420                         j = flist_find(flist, file);
2421                         file->mode = save_mode;
2422                 } else
2423                         j = -1;
2424                 if (j >= 0) {
2425                         int keep, drop;
2426                         /* If one is a dir and the other is not, we want to
2427                          * keep the dir because it might have contents in the
2428                          * list.  Otherwise keep the first one. */
2429                         if (S_ISDIR(file->mode)) {
2430                                 struct file_struct *fp = flist->sorted[j];
2431                                 if (!S_ISDIR(fp->mode))
2432                                         keep = i, drop = j;
2433                                 else {
2434                                         if (am_sender)
2435                                                 file->flags |= FLAG_DUPLICATE;
2436                                         else { /* Make sure we merge our vital flags. */
2437                                                 fp->flags |= file->flags & (FLAG_TOP_DIR|FLAG_CONTENT_DIR);
2438                                                 fp->flags &= file->flags | ~FLAG_IMPLIED_DIR;
2439                                         }
2440                                         keep = j, drop = i;
2441                                 }
2442                         } else
2443                                 keep = j, drop = i;
2444
2445                         if (!am_sender) {
2446                                 if (verbose > 1) {
2447                                         rprintf(FINFO,
2448                                             "removing duplicate name %s from file list (%d)\n",
2449                                             f_name(file, fbuf), drop + flist->ndx_start);
2450                                 }
2451                                 clear_file(flist->sorted[drop]);
2452                         }
2453
2454                         if (keep == i) {
2455                                 if (flist->low == drop) {
2456                                         for (j = drop + 1;
2457                                              j < i && !F_IS_ACTIVE(flist->sorted[j]);
2458                                              j++) {}
2459                                         flist->low = j;
2460                                 }
2461                                 prev_i = i;
2462                         }
2463                 } else
2464                         prev_i = i;
2465         }
2466         flist->high = prev_i;
2467
2468         if (strip_root) {
2469                 /* We need to strip off the leading slashes for relative
2470                  * paths, but this must be done _after_ the sorting phase. */
2471                 for (i = flist->low; i <= flist->high; i++) {
2472                         struct file_struct *file = flist->sorted[i];
2473
2474                         if (!file->dirname)
2475                                 continue;
2476                         while (*file->dirname == '/')
2477                                 file->dirname++;
2478                         if (!*file->dirname)
2479                                 file->dirname = NULL;
2480                 }
2481         }
2482
2483         if (prune_empty_dirs && !am_sender) {
2484                 int j, prev_depth = 0;
2485
2486                 prev_i = 0; /* It's OK that this isn't really true. */
2487
2488                 for (i = flist->low; i <= flist->high; i++) {
2489                         struct file_struct *fp, *file = flist->sorted[i];
2490
2491                         /* This temporarily abuses the F_DEPTH() value for a
2492                          * directory that is in a chain that might get pruned.
2493                          * We restore the old value if it gets a reprieve. */
2494                         if (S_ISDIR(file->mode) && F_DEPTH(file)) {
2495                                 /* Dump empty dirs when coming back down. */
2496                                 for (j = prev_depth; j >= F_DEPTH(file); j--) {
2497                                         fp = flist->sorted[prev_i];
2498                                         if (F_DEPTH(fp) >= 0)
2499                                                 break;
2500                                         prev_i = -F_DEPTH(fp)-1;
2501                                         clear_file(fp);
2502                                 }
2503                                 prev_depth = F_DEPTH(file);
2504                                 if (is_excluded(f_name(file, fbuf), 1,
2505                                                        ALL_FILTERS)) {
2506                                         /* Keep dirs through this dir. */
2507                                         for (j = prev_depth-1; ; j--) {
2508                                                 fp = flist->sorted[prev_i];
2509                                                 if (F_DEPTH(fp) >= 0)
2510                                                         break;
2511                                                 prev_i = -F_DEPTH(fp)-1;
2512                                                 F_DEPTH(fp) = j;
2513                                         }
2514                                 } else
2515                                         F_DEPTH(file) = -prev_i-1;
2516                                 prev_i = i;
2517                         } else {
2518                                 /* Keep dirs through this non-dir. */
2519                                 for (j = prev_depth; ; j--) {
2520                                         fp = flist->sorted[prev_i];
2521                                         if (F_DEPTH(fp) >= 0)
2522                                                 break;
2523                                         prev_i = -F_DEPTH(fp)-1;
2524                                         F_DEPTH(fp) = j;
2525                                 }
2526                         }
2527                 }
2528                 /* Dump all remaining empty dirs. */
2529                 while (1) {
2530                         struct file_struct *fp = flist->sorted[prev_i];
2531                         if (F_DEPTH(fp) >= 0)
2532                                 break;
2533                         prev_i = -F_DEPTH(fp)-1;
2534                         clear_file(fp);
2535                 }
2536
2537                 for (i = flist->low; i <= flist->high; i++) {
2538                         if (F_IS_ACTIVE(flist->sorted[i]))
2539                                 break;
2540                 }
2541                 flist->low = i;
2542                 for (i = flist->high; i >= flist->low; i--) {
2543                         if (F_IS_ACTIVE(flist->sorted[i]))
2544                                 break;
2545                 }
2546                 flist->high = i;
2547         }
2548 }
2549
2550 static void output_flist(struct file_list *flist)
2551 {
2552         char uidbuf[16], gidbuf[16], depthbuf[16];
2553         struct file_struct *file;
2554         const char *root, *dir, *slash, *name, *trail;
2555         const char *who = who_am_i();
2556         int i;
2557
2558         rprintf(FINFO, "[%s] flist start=%d, end=%d, used=%d, low=%d, high=%d\n",
2559                 who, flist->ndx_start, flist->ndx_end, flist->used, flist->low, flist->high);
2560         for (i = 0; i < flist->used; i++) {
2561                 file = flist->files[i];
2562                 if ((am_root || am_sender) && uid_ndx) {
2563                         snprintf(uidbuf, sizeof uidbuf, " uid=%u",
2564                                  F_OWNER(file));
2565                 } else
2566                         *uidbuf = '\0';
2567                 if (gid_ndx) {
2568                         static char parens[] = "(\0)\0\0\0";
2569                         char *pp = parens + (file->flags & FLAG_SKIP_GROUP ? 0 : 3);
2570                         snprintf(gidbuf, sizeof gidbuf, " gid=%s%u%s",
2571                                  pp, F_GROUP(file), pp + 2);
2572                 } else
2573                         *gidbuf = '\0';
2574                 if (!am_sender)
2575                         snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file));
2576                 if (F_IS_ACTIVE(file)) {
2577                         root = am_sender ? NS(F_PATHNAME(file)) : depthbuf;
2578                         if ((dir = file->dirname) == NULL)
2579                                 dir = slash = "";
2580                         else
2581                                 slash = "/";
2582                         name = file->basename;
2583                         trail = S_ISDIR(file->mode) ? "/" : "";
2584                 } else
2585                         root = dir = slash = name = trail = "";
2586                 rprintf(FINFO,
2587                         "[%s] i=%d %s %s%s%s%s mode=0%o len=%.0f%s%s flags=%x\n",
2588                         who, i + flist->ndx_start,
2589                         root, dir, slash, name, trail,
2590                         (int)file->mode, (double)F_LENGTH(file),
2591                         uidbuf, gidbuf, file->flags);
2592         }
2593 }
2594
2595 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
2596 enum fnc_type { t_PATH, t_ITEM };
2597
2598 static int found_prefix;
2599
2600 /* Compare the names of two file_struct entities, similar to how strcmp()
2601  * would do if it were operating on the joined strings.
2602  *
2603  * Some differences beginning with protocol_version 29: (1) directory names
2604  * are compared with an assumed trailing slash so that they compare in a
2605  * way that would cause them to sort immediately prior to any content they
2606  * may have; (2) a directory of any name compares after a non-directory of
2607  * any name at the same depth; (3) a directory with name "." compares prior
2608  * to anything else.  These changes mean that a directory and a non-dir
2609  * with the same name will not compare as equal (protocol_version >= 29).
2610  *
2611  * The dirname component can be an empty string, but the basename component
2612  * cannot (and never is in the current codebase).  The basename component
2613  * may be NULL (for a removed item), in which case it is considered to be
2614  * after any existing item. */
2615 int f_name_cmp(const struct file_struct *f1, const struct file_struct *f2)
2616 {
2617         int dif;
2618         const uchar *c1, *c2;
2619         enum fnc_state state1, state2;
2620         enum fnc_type type1, type2;
2621         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
2622
2623         if (!f1 || !F_IS_ACTIVE(f1)) {
2624                 if (!f2 || !F_IS_ACTIVE(f2))
2625                         return 0;
2626                 return -1;
2627         }
2628         if (!f2 || !F_IS_ACTIVE(f2))
2629                 return 1;
2630
2631         c1 = (uchar*)f1->dirname;
2632         c2 = (uchar*)f2->dirname;
2633         if (c1 == c2)
2634                 c1 = c2 = NULL;
2635         if (!c1) {
2636                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2637                 c1 = (const uchar*)f1->basename;
2638                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2639                         type1 = t_ITEM;
2640                         state1 = s_TRAILING;
2641                         c1 = (uchar*)"";
2642                 } else
2643                         state1 = s_BASE;
2644         } else {
2645                 type1 = t_path;
2646                 state1 = s_DIR;
2647         }
2648         if (!c2) {
2649                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2650                 c2 = (const uchar*)f2->basename;
2651                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2652                         type2 = t_ITEM;
2653                         state2 = s_TRAILING;
2654                         c2 = (uchar*)"";
2655                 } else
2656                         state2 = s_BASE;
2657         } else {
2658                 type2 = t_path;
2659                 state2 = s_DIR;
2660         }
2661
2662         if (type1 != type2)
2663                 return type1 == t_PATH ? 1 : -1;
2664
2665         do {
2666                 if (!*c1) {
2667                         switch (state1) {
2668                         case s_DIR:
2669                                 state1 = s_SLASH;
2670                                 c1 = (uchar*)"/";
2671                                 break;
2672                         case s_SLASH:
2673                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2674                                 c1 = (const uchar*)f1->basename;
2675                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2676                                         type1 = t_ITEM;
2677                                         state1 = s_TRAILING;
2678                                         c1 = (uchar*)"";
2679                                 } else
2680                                         state1 = s_BASE;
2681                                 break;
2682                         case s_BASE:
2683                                 state1 = s_TRAILING;
2684                                 if (type1 == t_PATH) {
2685                                         c1 = (uchar*)"/";
2686                                         break;
2687                                 }
2688                                 /* FALL THROUGH */
2689                         case s_TRAILING:
2690                                 type1 = t_ITEM;
2691                                 break;
2692                         }
2693                         if (*c2 && type1 != type2)
2694                                 return type1 == t_PATH ? 1 : -1;
2695                 }
2696                 if (!*c2) {
2697                         switch (state2) {
2698                         case s_DIR:
2699                                 state2 = s_SLASH;
2700                                 c2 = (uchar*)"/";
2701                                 break;
2702                         case s_SLASH:
2703                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2704                                 c2 = (const uchar*)f2->basename;
2705                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2706                                         type2 = t_ITEM;
2707                                         state2 = s_TRAILING;
2708                                         c2 = (uchar*)"";
2709                                 } else
2710                                         state2 = s_BASE;
2711                                 break;
2712                         case s_BASE:
2713                                 state2 = s_TRAILING;
2714                                 if (type2 == t_PATH) {
2715                                         c2 = (uchar*)"/";
2716                                         break;
2717                                 }
2718                                 /* FALL THROUGH */
2719                         case s_TRAILING:
2720                                 found_prefix = 1;
2721                                 if (!*c1)
2722                                         return 0;
2723                                 type2 = t_ITEM;
2724                                 break;
2725                         }
2726                         if (type1 != type2)
2727                                 return type1 == t_PATH ? 1 : -1;
2728                 }
2729         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
2730
2731         return dif;
2732 }
2733
2734 /* Returns 1 if f1's filename has all of f2's filename as a prefix.  This does
2735  * not match if f2's basename is not an exact match of a path element in f1.
2736  * E.g. /path/foo is not a prefix of /path/foobar/baz, but /path/foobar is. */
2737 int f_name_has_prefix(const struct file_struct *f1, const struct file_struct *f2)
2738 {
2739         found_prefix = 0;
2740         f_name_cmp(f1, f2);
2741         return found_prefix;
2742 }
2743
2744 char *f_name_buf(void)
2745 {
2746         static char names[5][MAXPATHLEN];
2747         static unsigned int n;
2748
2749         n = (n + 1) % (sizeof names / sizeof names[0]);
2750
2751         return names[n];
2752 }
2753
2754 /* Return a copy of the full filename of a flist entry, using the indicated
2755  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
2756  * done because we checked the size when creating the file_struct entry.
2757  */
2758 char *f_name(const struct file_struct *f, char *fbuf)
2759 {
2760         if (!f || !F_IS_ACTIVE(f))
2761                 return NULL;
2762
2763         if (!fbuf)
2764                 fbuf = f_name_buf();
2765
2766         if (f->dirname) {
2767                 int len = strlen(f->dirname);
2768                 memcpy(fbuf, f->dirname, len);
2769                 fbuf[len] = '/';
2770                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
2771         } else
2772                 strlcpy(fbuf, f->basename, MAXPATHLEN);
2773
2774         return fbuf;
2775 }
2776
2777 /* Do a non-recursive scan of the named directory, possibly ignoring all
2778  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
2779  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
2780  * buffer (the functions we call will append names onto the end, but the old
2781  * dir value will be restored on exit). */
2782 struct file_list *get_dirlist(char *dirname, int dlen, int ignore_filter_rules)
2783 {
2784         struct file_list *dirlist;
2785         char dirbuf[MAXPATHLEN];
2786         int save_recurse = recurse;
2787         int save_xfer_dirs = xfer_dirs;
2788         int save_prune_empty_dirs = prune_empty_dirs;
2789
2790         if (dlen < 0) {
2791                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
2792                 if (dlen >= MAXPATHLEN)
2793                         return NULL;
2794                 dirname = dirbuf;
2795         }
2796
2797         dirlist = flist_new(FLIST_TEMP, "get_dirlist");
2798
2799         recurse = 0;
2800         xfer_dirs = 1;
2801         send_directory(ignore_filter_rules ? -2 : -1, dirlist, dirname, dlen, 0);
2802         xfer_dirs = save_xfer_dirs;
2803         recurse = save_recurse;
2804         if (do_progress)
2805                 flist_count_offset += dirlist->used;
2806
2807         prune_empty_dirs = 0;
2808         dirlist->sorted = dirlist->files;
2809         clean_flist(dirlist, 0);
2810         prune_empty_dirs = save_prune_empty_dirs;
2811
2812         if (verbose > 3)
2813                 output_flist(dirlist);
2814
2815         return dirlist;
2816 }