flist.c

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