flist.c

   1 /*
   2  * Generate and receive file lists.
   3  *
   4  * Copyright (C) 1996 Andrew Tridgell
   5  * Copyright (C) 1996 Paul Mackerras
   6  * Copyright (C) 2001, 2002 Martin Pool <mbp@samba.org>
   7  * Copyright (C) 2002-2007 Wayne Davison
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 3 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, visit the http://fsf.org website.
  21  */
  22
  23 #include "rsync.h"
  24 #include "ifuncs.h"
  25 #include "rounding.h"
  26 #include "io.h"
  27
  28 extern int verbose;
  29 extern int am_root;
  30 extern int am_server;
  31 extern int am_daemon;
  32 extern int am_sender;
  33 extern int am_generator;
  34 extern int inc_recurse;
  35 extern int do_progress;
  36 extern int always_checksum;
  37 extern int module_id;
  38 extern int ignore_errors;
  39 extern int numeric_ids;
  40 extern int recurse;
  41 extern int use_qsort;
  42 extern int xfer_dirs;
  43 extern int filesfrom_fd;
  44 extern int one_file_system;
  45 extern int copy_dirlinks;
  46 extern int keep_dirlinks;
  47 extern int preserve_acls;
  48 extern int preserve_xattrs;
  49 extern int preserve_links;
  50 extern int preserve_hard_links;
  51 extern int preserve_devices;
  52 extern int preserve_specials;
  53 extern int uid_ndx;
  54 extern int gid_ndx;
  55 extern int eol_nulls;
  56 extern int relative_paths;
  57 extern int implied_dirs;
  58 extern int file_extra_cnt;
  59 extern int ignore_perishable;
  60 extern int non_perishable_cnt;
  61 extern int prune_empty_dirs;
  62 extern int copy_links;
  63 extern int copy_unsafe_links;
  64 extern int protocol_version;
  65 extern int sanitize_paths;
  66 extern int munge_symlinks;
  67 extern int need_unsorted_flist;
  68 extern int unsort_ndx;
  69 extern struct stats stats;
  70 extern char *filesfrom_host;
  71
  72 extern char curr_dir[MAXPATHLEN];
  73
  74 extern struct chmod_mode_struct *chmod_modes;
  75
  76 extern struct filter_list_struct filter_list;
  77 extern struct filter_list_struct server_filter_list;
  78
  79 #ifdef ICONV_OPTION
  80 extern int filesfrom_convert;
  81 extern iconv_t ic_send, ic_recv;
  82 #endif
  83
  84 #define PTR_SIZE (sizeof (struct file_struct *))
  85
  86 int io_error;
  87 int checksum_len;
  88 dev_t filesystem_dev; /* used to implement -x */
  89
  90 struct file_list *cur_flist, *first_flist, *dir_flist;
  91 int send_dir_ndx = -1, send_dir_depth = -1;
  92 int flist_cnt = 0; /* how many (non-tmp) file list objects exist */
  93 int file_total = 0; /* total of all active items over all file-lists */
  94 int flist_eof = 0; /* all the file-lists are now known */
  95
  96 #define NORMAL_NAME 0
  97 #define SLASH_ENDING_NAME 1
  98 #define DOT_NAME 2
  99
 100 /* Starting from protocol version 26, we always use 64-bit ino_t and dev_t
 101  * internally, even if this platform does not allow files to have 64-bit inums.
 102  * The only exception is if we're on a platform with no 64-bit type at all.
 103  *
 104  * Because we use read_longint() to get these off the wire, if you transfer
 105  * devices or (for protocols < 30) hardlinks with dev or inum > 2**32 to a
 106  * machine with no 64-bit types then you will get an overflow error.
 107  *
 108  * Note that if you transfer devices from a 64-bit-devt machine (say, Solaris)
 109  * to a 32-bit-devt machine (say, Linux-2.2/x86) then the device numbers will
 110  * be truncated.  But it's a kind of silly thing to do anyhow. */
 111
 112 /* The tmp_* vars are used as a cache area by make_file() to store data
 113  * that the sender doesn't need to remember in its file list.  The data
 114  * will survive just long enough to be used by send_file_entry(). */
 115 static dev_t tmp_rdev;
 116 #ifdef SUPPORT_HARD_LINKS
 117 static int64 tmp_dev, tmp_ino;
 118 #endif
 119 static char tmp_sum[MAX_DIGEST_LEN];
 120
 121 static char empty_sum[MAX_DIGEST_LEN];
 122 static int flist_count_offset; /* for --delete --progress */
 123 static int dir_count = 0;
 124
 125 static void flist_sort_and_clean(struct file_list *flist, int strip_root);
 126 static void output_flist(struct file_list *flist);
 127
 128 void init_flist(void)
 129 {
 130         if (verbose > 4) {
 131                 rprintf(FINFO, "FILE_STRUCT_LEN=%d, EXTRA_LEN=%d\n",
 132                         (int)FILE_STRUCT_LEN, (int)EXTRA_LEN);
 133         }
 134         checksum_len = protocol_version < 21 ? 2
 135                      : protocol_version < 30 ? MD4_DIGEST_LEN
 136                      : MD5_DIGEST_LEN;
 137 }
 138
 139 static int show_filelist_p(void)
 140 {
 141         return verbose && xfer_dirs && !am_server && !inc_recurse;
 142 }
 143
 144 static void start_filelist_progress(char *kind)
 145 {
 146         rprintf(FCLIENT, "%s ... ", kind);
 147         if (verbose > 1 || do_progress)
 148                 rprintf(FCLIENT, "\n");
 149         rflush(FINFO);
 150 }
 151
 152 static void emit_filelist_progress(int count)
 153 {
 154         rprintf(FCLIENT, " %d files...\r", count);
 155 }
 156
 157 static void maybe_emit_filelist_progress(int count)
 158 {
 159         if (do_progress && show_filelist_p() && (count % 100) == 0)
 160                 emit_filelist_progress(count);
 161 }
 162
 163 static void finish_filelist_progress(const struct file_list *flist)
 164 {
 165         if (do_progress) {
 166                 /* This overwrites the progress line */
 167                 rprintf(FINFO, "%d file%sto consider\n",
 168                         flist->used, flist->used == 1 ? " " : "s ");
 169         } else
 170                 rprintf(FINFO, "done\n");
 171 }
 172
 173 void show_flist_stats(void)
 174 {
 175         /* Nothing yet */
 176 }
 177
 178 /* Stat either a symlink or its referent, depending on the settings of
 179  * copy_links, copy_unsafe_links, etc.  Returns -1 on error, 0 on success.
 180  *
 181  * If path is the name of a symlink, then the linkbuf buffer (which must hold
 182  * MAXPATHLEN chars) will be set to the symlink's target string.
 183  *
 184  * The stat structure pointed to by stp will contain information about the
 185  * link or the referent as appropriate, if they exist. */
 186 static int readlink_stat(const char *path, STRUCT_STAT *stp, char *linkbuf)
 187 {
 188 #ifdef SUPPORT_LINKS
 189         if (link_stat(path, stp, copy_dirlinks) < 0)
 190                 return -1;
 191         if (S_ISLNK(stp->st_mode)) {
 192                 int llen = readlink(path, linkbuf, MAXPATHLEN - 1);
 193                 if (llen < 0)
 194                         return -1;
 195                 linkbuf[llen] = '\0';
 196                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 197                         if (verbose > 1) {
 198                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 199                                         path, linkbuf);
 200                         }
 201                         return x_stat(path, stp, NULL);
 202                 }
 203                 if (munge_symlinks && am_sender && llen > SYMLINK_PREFIX_LEN
 204                  && strncmp(linkbuf, SYMLINK_PREFIX, SYMLINK_PREFIX_LEN) == 0) {
 205                         memmove(linkbuf, linkbuf + SYMLINK_PREFIX_LEN,
 206                                 llen - SYMLINK_PREFIX_LEN + 1);
 207                 }
 208         }
 209         return 0;
 210 #else
 211         return x_stat(path, stp, NULL);
 212 #endif
 213 }
 214
 215 int link_stat(const char *path, STRUCT_STAT *stp, int follow_dirlinks)
 216 {
 217 #ifdef SUPPORT_LINKS
 218         if (copy_links)
 219                 return x_stat(path, stp, NULL);
 220         if (x_lstat(path, stp, NULL) < 0)
 221                 return -1;
 222         if (follow_dirlinks && S_ISLNK(stp->st_mode)) {
 223                 STRUCT_STAT st;
 224                 if (x_stat(path, &st, NULL) == 0 && S_ISDIR(st.st_mode))
 225                         *stp = st;
 226         }
 227         return 0;
 228 #else
 229         return x_stat(path, stp, NULL);
 230 #endif
 231 }
 232
 233 /* This function is used to check if a file should be included/excluded
 234  * from the list of files based on its name and type etc.  The value of
 235  * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
 236 static int is_excluded(char *fname, int is_dir, int filter_level)
 237 {
 238 #if 0 /* This currently never happens, so avoid a useless compare. */
 239         if (filter_level == NO_FILTERS)
 240                 return 0;
 241 #endif
 242         if (fname) {
 243                 /* never exclude '.', even if somebody does --exclude '*' */
 244                 if (fname[0] == '.' && !fname[1])
 245                         return 0;
 246                 /* Handle the -R version of the '.' dir. */
 247                 if (fname[0] == '/') {
 248                         int len = strlen(fname);
 249                         if (fname[len-1] == '.' && fname[len-2] == '/')
 250                                 return 0;
 251                 }
 252         }
 253         if (server_filter_list.head
 254             && check_filter(&server_filter_list, fname, is_dir) < 0)
 255                 return 1;
 256         if (filter_level != ALL_FILTERS)
 257                 return 0;
 258         if (filter_list.head
 259             && check_filter(&filter_list, fname, is_dir) < 0)
 260                 return 1;
 261         return 0;
 262 }
 263
 264 static void send_directory(int f, struct file_list *flist,
 265                            char *fbuf, int len, int flags);
 266
 267 static const char *pathname, *orig_dir;
 268 static int pathname_len;
 269
 270
 271 /* Make sure flist can hold at least flist->used + extra entries. */
 272 static void flist_expand(struct file_list *flist, int extra)
 273 {
 274         struct file_struct **new_ptr;
 275
 276         if (flist->used + extra <= flist->malloced)
 277                 return;
 278
 279         if (flist->malloced < FLIST_START)
 280                 flist->malloced = FLIST_START;
 281         else if (flist->malloced >= FLIST_LINEAR)
 282                 flist->malloced += FLIST_LINEAR;
 283         else
 284                 flist->malloced *= 2;
 285
 286         /* In case count jumped or we are starting the list
 287          * with a known size just set it. */
 288         if (flist->malloced < flist->used + extra)
 289                 flist->malloced = flist->used + extra;
 290
 291         new_ptr = realloc_array(flist->files, struct file_struct *,
 292                                 flist->malloced);
 293
 294         if (verbose >= 2 && flist->malloced != FLIST_START) {
 295                 rprintf(FCLIENT, "[%s] expand file_list pointer array to %.0f bytes, did%s move\n",
 296                     who_am_i(),
 297                     (double)sizeof flist->files[0] * flist->malloced,
 298                     (new_ptr == flist->files) ? " not" : "");
 299         }
 300
 301         flist->files = new_ptr;
 302
 303         if (!flist->files)
 304                 out_of_memory("flist_expand");
 305 }
 306
 307 static void flist_done_allocating(struct file_list *flist)
 308 {
 309         void *ptr = pool_boundary(flist->file_pool, 8*1024);
 310         if (flist->pool_boundary == ptr)
 311                 flist->pool_boundary = NULL; /* list didn't use any pool memory */
 312         else
 313                 flist->pool_boundary = ptr;
 314 }
 315
 316 int push_pathname(const char *dir, int len)
 317 {
 318         if (dir == pathname)
 319                 return 1;
 320
 321         if (!orig_dir)
 322                 orig_dir = strdup(curr_dir);
 323
 324         if (pathname && !pop_dir(orig_dir)) {
 325                 rsyserr(FERROR, errno, "pop_dir %s failed",
 326                         full_fname(orig_dir));
 327                 exit_cleanup(RERR_FILESELECT);
 328         }
 329
 330         if (dir && !push_dir(dir, 0)) {
 331                 io_error |= IOERR_GENERAL;
 332                 rsyserr(FERROR, errno, "push_dir %s failed in %s",
 333                         full_fname(dir), curr_dir);
 334                 return 0;
 335         }
 336
 337         pathname = dir;
 338         pathname_len = len >= 0 ? len : dir ? (int)strlen(dir) : 0;
 339
 340         return 1;
 341 }
 342
 343 static void send_file_entry(int f, struct file_struct *file, int ndx, int first_ndx)
 344 {
 345         static time_t modtime;
 346         static mode_t mode;
 347 #ifdef SUPPORT_HARD_LINKS
 348         static int64 dev;
 349 #endif
 350         static dev_t rdev;
 351         static uint32 rdev_major;
 352         static uid_t uid;
 353         static gid_t gid;
 354         static const char *user_name, *group_name;
 355         static char lastname[MAXPATHLEN];
 356         char fname[MAXPATHLEN];
 357         int first_hlink_ndx = -1;
 358         int l1, l2;
 359         int xflags;
 360
 361 #ifdef ICONV_OPTION
 362         if (ic_send != (iconv_t)-1) {
 363                 xbuf outbuf, inbuf;
 364
 365                 INIT_CONST_XBUF(outbuf, fname);
 366
 367                 if (file->dirname) {
 368                         INIT_XBUF_STRLEN(inbuf, (char*)file->dirname);
 369                         outbuf.size -= 2; /* Reserve room for '/' & 1 more char. */
 370                         if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0)
 371                                 goto convert_error;
 372                         outbuf.size += 2;
 373                         outbuf.buf[outbuf.len++] = '/';
 374                 }
 375
 376                 INIT_XBUF_STRLEN(inbuf, (char*)file->basename);
 377                 if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0) {
 378                   convert_error:
 379                         io_error |= IOERR_GENERAL;
 380                         rprintf(FINFO,
 381                             "[%s] cannot convert filename: %s (%s)\n",
 382                             who_am_i(), f_name(file, fname), strerror(errno));
 383                         return;
 384                 }
 385                 outbuf.buf[outbuf.len] = '\0';
 386         } else
 387 #endif
 388                 f_name(file, fname);
 389
 390         /* Initialize starting value of xflags. */
 391         if (protocol_version >= 30 && S_ISDIR(file->mode)) {
 392                 dir_count++;
 393                 if (file->flags & FLAG_CONTENT_DIR)
 394                         xflags = file->flags & FLAG_TOP_DIR;
 395                 else if (file->flags & FLAG_IMPLIED_DIR)
 396                         xflags = XMIT_TOP_DIR | XMIT_NO_CONTENT_DIR;
 397                 else
 398                         xflags = XMIT_NO_CONTENT_DIR;
 399         } else
 400                 xflags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */
 401
 402         if (file->mode == mode)
 403                 xflags |= XMIT_SAME_MODE;
 404         else
 405                 mode = file->mode;
 406
 407         if ((preserve_devices && IS_DEVICE(mode))
 408          || (preserve_specials && IS_SPECIAL(mode))) {
 409                 if (protocol_version < 28) {
 410                         if (tmp_rdev == rdev)
 411                                 xflags |= XMIT_SAME_RDEV_pre28;
 412                         else
 413                                 rdev = tmp_rdev;
 414                 } else {
 415                         rdev = tmp_rdev;
 416                         if ((uint32)major(rdev) == rdev_major)
 417                                 xflags |= XMIT_SAME_RDEV_MAJOR;
 418                         else
 419                                 rdev_major = major(rdev);
 420                         if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu)
 421                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
 422                 }
 423         } else if (protocol_version < 28)
 424                 rdev = MAKEDEV(0, 0);
 425         if (uid_ndx) {
 426                 if ((uid_t)F_OWNER(file) == uid && *lastname)
 427                         xflags |= XMIT_SAME_UID;
 428                 else {
 429                         uid = F_OWNER(file);
 430                         if (uid_ndx && !numeric_ids) {
 431                                 user_name = add_uid(uid);
 432                                 if (inc_recurse && user_name)
 433                                         xflags |= XMIT_USER_NAME_FOLLOWS;
 434                         }
 435                 }
 436         }
 437         if (gid_ndx) {
 438                 if ((gid_t)F_GROUP(file) == gid && *lastname)
 439                         xflags |= XMIT_SAME_GID;
 440                 else {
 441                         gid = F_GROUP(file);
 442                         if (gid_ndx && !numeric_ids) {
 443                                 group_name = add_gid(gid);
 444                                 if (inc_recurse && group_name)
 445                                         xflags |= XMIT_GROUP_NAME_FOLLOWS;
 446                         }
 447                 }
 448         }
 449         if (file->modtime == modtime)
 450                 xflags |= XMIT_SAME_TIME;
 451         else
 452                 modtime = file->modtime;
 453
 454 #ifdef SUPPORT_HARD_LINKS
 455         if (tmp_dev != 0) {
 456                 if (protocol_version >= 30) {
 457                         struct ht_int64_node *np = idev_find(tmp_dev, tmp_ino);
 458                         first_hlink_ndx = (int32)(long)np->data - 1;
 459                         if (first_hlink_ndx < 0) {
 460                                 np->data = (void*)(long)(first_ndx + ndx + 1);
 461                                 xflags |= XMIT_HLINK_FIRST;
 462                         }
 463                         xflags |= XMIT_HLINKED;
 464                 } else {
 465                         if (tmp_dev == dev) {
 466                                 if (protocol_version >= 28)
 467                                         xflags |= XMIT_SAME_DEV_pre30;
 468                         } else
 469                                 dev = tmp_dev;
 470                         xflags |= XMIT_HLINKED;
 471                 }
 472         }
 473 #endif
 474
 475         for (l1 = 0;
 476             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 477             l1++) {}
 478         l2 = strlen(fname+l1);
 479
 480         if (l1 > 0)
 481                 xflags |= XMIT_SAME_NAME;
 482         if (l2 > 255)
 483                 xflags |= XMIT_LONG_NAME;
 484
 485         /* We must make sure we don't send a zero flag byte or the
 486          * other end will terminate the flist transfer.  Note that
 487          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 488          * it's harmless way to add a bit to the first flag byte. */
 489         if (protocol_version >= 28) {
 490                 if (!xflags && !S_ISDIR(mode))
 491                         xflags |= XMIT_TOP_DIR;
 492                 if ((xflags & 0xFF00) || !xflags) {
 493                         xflags |= XMIT_EXTENDED_FLAGS;
 494                         write_shortint(f, xflags);
 495                 } else
 496                         write_byte(f, xflags);
 497         } else {
 498                 if (!(xflags & 0xFF))
 499                         xflags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
 500                 write_byte(f, xflags);
 501         }
 502         if (xflags & XMIT_SAME_NAME)
 503                 write_byte(f, l1);
 504         if (xflags & XMIT_LONG_NAME)
 505                 write_varint30(f, l2);
 506         else
 507                 write_byte(f, l2);
 508         write_buf(f, fname + l1, l2);
 509
 510         if (first_hlink_ndx >= 0) {
 511                 write_varint(f, first_hlink_ndx);
 512                 if (first_hlink_ndx >= first_ndx)
 513                         goto the_end;
 514         }
 515
 516         write_varlong30(f, F_LENGTH(file), 3);
 517         if (!(xflags & XMIT_SAME_TIME)) {
 518                 if (protocol_version >= 30)
 519                         write_varlong(f, modtime, 4);
 520                 else
 521                         write_int(f, modtime);
 522         }
 523         if (!(xflags & XMIT_SAME_MODE))
 524                 write_int(f, to_wire_mode(mode));
 525         if (uid_ndx && !(xflags & XMIT_SAME_UID)) {
 526                 if (protocol_version < 30)
 527                         write_int(f, uid);
 528                 else {
 529                         write_varint(f, uid);
 530                         if (xflags & XMIT_USER_NAME_FOLLOWS) {
 531                                 int len = strlen(user_name);
 532                                 write_byte(f, len);
 533                                 write_buf(f, user_name, len);
 534                         }
 535                 }
 536         }
 537         if (gid_ndx && !(xflags & XMIT_SAME_GID)) {
 538                 if (protocol_version < 30)
 539                         write_int(f, gid);
 540                 else {
 541                         write_varint(f, gid);
 542                         if (xflags & XMIT_GROUP_NAME_FOLLOWS) {
 543                                 int len = strlen(group_name);
 544                                 write_byte(f, len);
 545                                 write_buf(f, group_name, len);
 546                         }
 547                 }
 548         }
 549         if ((preserve_devices && IS_DEVICE(mode))
 550          || (preserve_specials && IS_SPECIAL(mode))) {
 551                 if (protocol_version < 28) {
 552                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 553                                 write_int(f, (int)rdev);
 554                 } else {
 555                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 556                                 write_varint30(f, major(rdev));
 557                         if (protocol_version >= 30)
 558                                 write_varint(f, minor(rdev));
 559                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 560                                 write_byte(f, minor(rdev));
 561                         else
 562                                 write_int(f, minor(rdev));
 563                 }
 564         }
 565
 566 #ifdef SUPPORT_LINKS
 567         if (preserve_links && S_ISLNK(mode)) {
 568                 const char *sl = F_SYMLINK(file);
 569                 int len = strlen(sl);
 570                 write_varint30(f, len);
 571                 write_buf(f, sl, len);
 572         }
 573 #endif
 574
 575 #ifdef SUPPORT_HARD_LINKS
 576         if (tmp_dev != 0 && protocol_version < 30) {
 577                 if (protocol_version < 26) {
 578                         /* 32-bit dev_t and ino_t */
 579                         write_int(f, (int32)dev);
 580                         write_int(f, (int32)tmp_ino);
 581                 } else {
 582                         /* 64-bit dev_t and ino_t */
 583                         if (!(xflags & XMIT_SAME_DEV_pre30))
 584                                 write_longint(f, dev);
 585                         write_longint(f, tmp_ino);
 586                 }
 587         }
 588 #endif
 589
 590         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 591                 const char *sum;
 592                 if (S_ISREG(mode))
 593                         sum = tmp_sum;
 594                 else {
 595                         /* Prior to 28, we sent a useless set of nulls. */
 596                         sum = empty_sum;
 597                 }
 598                 write_buf(f, sum, checksum_len);
 599         }
 600
 601   the_end:
 602         strlcpy(lastname, fname, MAXPATHLEN);
 603
 604         if (S_ISREG(mode) || S_ISLNK(mode))
 605                 stats.total_size += F_LENGTH(file);
 606 }
 607
 608 static struct file_struct *recv_file_entry(struct file_list *flist,
 609                                            int xflags, int f)
 610 {
 611         static int64 modtime;
 612         static mode_t mode;
 613 #ifdef SUPPORT_HARD_LINKS
 614         static int64 dev;
 615 #endif
 616         static dev_t rdev;
 617         static uint32 rdev_major;
 618         static uid_t uid;
 619         static gid_t gid;
 620         static uint16 gid_flags;
 621         static char lastname[MAXPATHLEN], *lastdir;
 622         static int lastdir_depth, lastdir_len = -1;
 623         static unsigned int del_hier_name_len = 0;
 624         static int in_del_hier = 0;
 625         char thisname[MAXPATHLEN];
 626         unsigned int l1 = 0, l2 = 0;
 627         int alloc_len, basename_len, linkname_len;
 628         int extra_len = file_extra_cnt * EXTRA_LEN;
 629         int first_hlink_ndx = -1;
 630         OFF_T file_length;
 631         const char *basename;
 632         struct file_struct *file;
 633         alloc_pool_t *pool;
 634         char *bp;
 635
 636         if (xflags & XMIT_SAME_NAME)
 637                 l1 = read_byte(f);
 638
 639         if (xflags & XMIT_LONG_NAME)
 640                 l2 = read_varint30(f);
 641         else
 642                 l2 = read_byte(f);
 643
 644         if (l2 >= MAXPATHLEN - l1) {
 645                 rprintf(FERROR,
 646                         "overflow: xflags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
 647                         xflags, l1, l2, lastname, who_am_i());
 648                 overflow_exit("recv_file_entry");
 649         }
 650
 651         strlcpy(thisname, lastname, l1 + 1);
 652         read_sbuf(f, &thisname[l1], l2);
 653         thisname[l1 + l2] = 0;
 654
 655         /* Abuse basename_len for a moment... */
 656         basename_len = strlcpy(lastname, thisname, MAXPATHLEN);
 657
 658 #ifdef ICONV_OPTION
 659         if (ic_recv != (iconv_t)-1) {
 660                 xbuf outbuf, inbuf;
 661
 662                 INIT_CONST_XBUF(outbuf, thisname);
 663                 INIT_XBUF(inbuf, lastname, basename_len, -1);
 664
 665                 if (iconvbufs(ic_recv, &inbuf, &outbuf, 0) < 0) {
 666                         io_error |= IOERR_GENERAL;
 667                         rprintf(FINFO,
 668                             "[%s] cannot convert filename: %s (%s)\n",
 669                             who_am_i(), lastname, strerror(errno));
 670                         outbuf.len = 0;
 671                 }
 672                 outbuf.buf[outbuf.len] = '\0';
 673         }
 674 #endif
 675
 676         clean_fname(thisname, 0);
 677
 678         if (sanitize_paths)
 679                 sanitize_path(thisname, thisname, "", 0);
 680
 681         if ((basename = strrchr(thisname, '/')) != NULL) {
 682                 int len = basename++ - thisname;
 683                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
 684                         lastdir = new_array(char, len + 1);
 685                         memcpy(lastdir, thisname, len);
 686                         lastdir[len] = '\0';
 687                         lastdir_len = len;
 688                         lastdir_depth = count_dir_elements(lastdir);
 689                 }
 690         } else
 691                 basename = thisname;
 692         basename_len = strlen(basename) + 1; /* count the '\0' */
 693
 694 #ifdef SUPPORT_HARD_LINKS
 695         if (protocol_version >= 30
 696          && BITS_SETnUNSET(xflags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
 697                 first_hlink_ndx = read_varint(f);
 698                 if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->ndx_start + flist->used) {
 699                         rprintf(FERROR,
 700                                 "hard-link reference out of range: %d (%d)\n",
 701                                 first_hlink_ndx, flist->ndx_start + flist->used);
 702                         exit_cleanup(RERR_PROTOCOL);
 703                 }
 704                 if (first_hlink_ndx >= flist->ndx_start) {
 705                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 706                         file_length = F_LENGTH(first);
 707                         modtime = first->modtime;
 708                         mode = first->mode;
 709                         if (uid_ndx)
 710                                 uid = F_OWNER(first);
 711                         if (gid_ndx)
 712                                 gid = F_GROUP(first);
 713                         if ((preserve_devices && IS_DEVICE(mode))
 714                          || (preserve_specials && IS_SPECIAL(mode))) {
 715                                 uint32 *devp = F_RDEV_P(first);
 716                                 rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
 717                                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 718                         }
 719                         if (preserve_links && S_ISLNK(mode))
 720                                 linkname_len = strlen(F_SYMLINK(first)) + 1;
 721                         else
 722                                 linkname_len = 0;
 723                         goto create_object;
 724                 }
 725         }
 726 #endif
 727
 728         file_length = read_varlong30(f, 3);
 729         if (!(xflags & XMIT_SAME_TIME)) {
 730                 if (protocol_version >= 30) {
 731                         modtime = read_varlong(f, 4);
 732 #if SIZEOF_TIME_T < SIZEOF_INT64
 733                         if (!am_generator && (int64)(time_t)modtime != modtime) {
 734                                 rprintf(FERROR_XFER,
 735                                     "Time value of %s truncated on receiver.\n",
 736                                     lastname);
 737                         }
 738 #endif
 739                 } else
 740                         modtime = read_int(f);
 741         }
 742         if (!(xflags & XMIT_SAME_MODE))
 743                 mode = from_wire_mode(read_int(f));
 744
 745         if (chmod_modes && !S_ISLNK(mode))
 746                 mode = tweak_mode(mode, chmod_modes);
 747
 748         if (uid_ndx && !(xflags & XMIT_SAME_UID)) {
 749                 if (protocol_version < 30)
 750                         uid = (uid_t)read_int(f);
 751                 else {
 752                         uid = (uid_t)read_varint(f);
 753                         if (xflags & XMIT_USER_NAME_FOLLOWS)
 754                                 uid = recv_user_name(f, uid);
 755                         else if (inc_recurse && am_root && !numeric_ids)
 756                                 uid = match_uid(uid);
 757                 }
 758         }
 759         if (gid_ndx && !(xflags & XMIT_SAME_GID)) {
 760                 if (protocol_version < 30)
 761                         gid = (gid_t)read_int(f);
 762                 else {
 763                         gid = (gid_t)read_varint(f);
 764                         gid_flags = 0;
 765                         if (xflags & XMIT_GROUP_NAME_FOLLOWS)
 766                                 gid = recv_group_name(f, gid, &gid_flags);
 767                         else if (inc_recurse && (!am_root || !numeric_ids))
 768                                 gid = match_gid(gid, &gid_flags);
 769                 }
 770         }
 771
 772         if ((preserve_devices && IS_DEVICE(mode))
 773          || (preserve_specials && IS_SPECIAL(mode))) {
 774                 if (protocol_version < 28) {
 775                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 776                                 rdev = (dev_t)read_int(f);
 777                 } else {
 778                         uint32 rdev_minor;
 779                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 780                                 rdev_major = read_varint30(f);
 781                         if (protocol_version >= 30)
 782                                 rdev_minor = read_varint(f);
 783                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 784                                 rdev_minor = read_byte(f);
 785                         else
 786                                 rdev_minor = read_int(f);
 787                         rdev = MAKEDEV(rdev_major, rdev_minor);
 788                 }
 789                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 790                 file_length = 0;
 791         } else if (protocol_version < 28)
 792                 rdev = MAKEDEV(0, 0);
 793
 794 #ifdef SUPPORT_LINKS
 795         if (preserve_links && S_ISLNK(mode)) {
 796                 linkname_len = read_varint30(f) + 1; /* count the '\0' */
 797                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 798                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 799                                 linkname_len - 1);
 800                         overflow_exit("recv_file_entry");
 801                 }
 802                 if (munge_symlinks)
 803                         linkname_len += SYMLINK_PREFIX_LEN;
 804         }
 805         else
 806 #endif
 807                 linkname_len = 0;
 808
 809 #ifdef SUPPORT_HARD_LINKS
 810   create_object:
 811         if (preserve_hard_links) {
 812                 if (protocol_version < 28 && S_ISREG(mode))
 813                         xflags |= XMIT_HLINKED;
 814                 if (xflags & XMIT_HLINKED)
 815                         extra_len += (inc_recurse+1) * EXTRA_LEN;
 816         }
 817 #endif
 818
 819 #ifdef SUPPORT_ACLS
 820         /* We need one or two index int32s when we're preserving ACLs. */
 821         if (preserve_acls)
 822                 extra_len += (S_ISDIR(mode) ? 2 : 1) * EXTRA_LEN;
 823 #endif
 824
 825         if (always_checksum && S_ISREG(mode))
 826                 extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
 827
 828         if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
 829                 extra_len += EXTRA_LEN;
 830
 831         if (inc_recurse && S_ISDIR(mode)) {
 832                 if (one_file_system) {
 833                         /* Room to save the dir's device for -x */
 834                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 835                 }
 836                 pool = dir_flist->file_pool;
 837         } else
 838                 pool = flist->file_pool;
 839
 840 #if EXTRA_ROUNDING > 0
 841         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
 842                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
 843 #endif
 844
 845         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
 846                   + linkname_len;
 847         bp = pool_alloc(pool, alloc_len, "recv_file_entry");
 848
 849         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
 850         bp += extra_len;
 851         file = (struct file_struct *)bp;
 852         bp += FILE_STRUCT_LEN;
 853
 854         memcpy(bp, basename, basename_len);
 855         bp += basename_len + linkname_len; /* skip space for symlink too */
 856
 857 #ifdef SUPPORT_HARD_LINKS
 858         if (xflags & XMIT_HLINKED)
 859                 file->flags |= FLAG_HLINKED;
 860 #endif
 861         file->modtime = (time_t)modtime;
 862         file->len32 = (uint32)file_length;
 863         if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
 864                 file->flags |= FLAG_LENGTH64;
 865                 OPT_EXTRA(file, 0)->unum = (uint32)(file_length >> 32);
 866         }
 867         file->mode = mode;
 868         if (uid_ndx)
 869                 F_OWNER(file) = uid;
 870         if (gid_ndx) {
 871                 F_GROUP(file) = gid;
 872                 file->flags |= gid_flags;
 873         }
 874         if (unsort_ndx)
 875                 F_NDX(file) = flist->used + flist->ndx_start;
 876
 877         if (basename != thisname) {
 878                 file->dirname = lastdir;
 879                 F_DEPTH(file) = lastdir_depth + 1;
 880         } else
 881                 F_DEPTH(file) = 1;
 882
 883         if (S_ISDIR(mode)) {
 884                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
 885                         F_DEPTH(file)--;
 886                 if (protocol_version >= 30) {
 887                         if (!(xflags & XMIT_NO_CONTENT_DIR)) {
 888                                 if (xflags & XMIT_TOP_DIR)
 889                                         file->flags |= FLAG_TOP_DIR;
 890                                 file->flags |= FLAG_CONTENT_DIR;
 891                         } else if (xflags & XMIT_TOP_DIR)
 892                                 file->flags |= FLAG_IMPLIED_DIR;
 893                 } else if (xflags & XMIT_TOP_DIR) {
 894                         in_del_hier = recurse;
 895                         del_hier_name_len = F_DEPTH(file) == 0 ? 0 : l1 + l2;
 896                         if (relative_paths && del_hier_name_len > 2
 897                             && lastname[del_hier_name_len-1] == '.'
 898                             && lastname[del_hier_name_len-2] == '/')
 899                                 del_hier_name_len -= 2;
 900                         file->flags |= FLAG_TOP_DIR | FLAG_CONTENT_DIR;
 901                 } else if (in_del_hier) {
 902                         if (!relative_paths || !del_hier_name_len
 903                          || (l1 >= del_hier_name_len
 904                           && lastname[del_hier_name_len] == '/'))
 905                                 file->flags |= FLAG_CONTENT_DIR;
 906                         else
 907                                 in_del_hier = 0;
 908                 }
 909         }
 910
 911         if ((preserve_devices && IS_DEVICE(mode))
 912          || (preserve_specials && IS_SPECIAL(mode))) {
 913                 uint32 *devp = F_RDEV_P(file);
 914                 DEV_MAJOR(devp) = major(rdev);
 915                 DEV_MINOR(devp) = minor(rdev);
 916         }
 917
 918 #ifdef SUPPORT_LINKS
 919         if (linkname_len) {
 920                 bp = (char*)file->basename + basename_len;
 921                 if (first_hlink_ndx >= flist->ndx_start) {
 922                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 923                         memcpy(bp, F_SYMLINK(first), linkname_len);
 924                 } else if (munge_symlinks) {
 925                         strlcpy(bp, SYMLINK_PREFIX, linkname_len);
 926                         bp += SYMLINK_PREFIX_LEN;
 927                         linkname_len -= SYMLINK_PREFIX_LEN;
 928                         read_sbuf(f, bp, linkname_len - 1);
 929                 } else {
 930                         read_sbuf(f, bp, linkname_len - 1);
 931                         if (sanitize_paths)
 932                                 sanitize_path(bp, bp, "", lastdir_depth);
 933                 }
 934         }
 935 #endif
 936
 937 #ifdef SUPPORT_HARD_LINKS
 938         if (preserve_hard_links && xflags & XMIT_HLINKED) {
 939                 if (protocol_version >= 30) {
 940                         if (xflags & XMIT_HLINK_FIRST) {
 941                                 F_HL_GNUM(file) = flist->ndx_start + flist->used;
 942                         } else
 943                                 F_HL_GNUM(file) = first_hlink_ndx;
 944                 } else {
 945                         static int32 cnt = 0;
 946                         struct ht_int64_node *np;
 947                         int64 ino;
 948                         int32 ndx;
 949                         if (protocol_version < 26) {
 950                                 dev = read_int(f);
 951                                 ino = read_int(f);
 952                         } else {
 953                                 if (!(xflags & XMIT_SAME_DEV_pre30))
 954                                         dev = read_longint(f);
 955                                 ino = read_longint(f);
 956                         }
 957                         np = idev_find(dev, ino);
 958                         ndx = (int32)(long)np->data - 1;
 959                         if (ndx < 0) {
 960                                 ndx = cnt++;
 961                                 np->data = (void*)(long)cnt;
 962                         }
 963                         F_HL_GNUM(file) = ndx;
 964                 }
 965         }
 966 #endif
 967
 968         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 969                 if (S_ISREG(mode))
 970                         bp = F_SUM(file);
 971                 else {
 972                         /* Prior to 28, we get a useless set of nulls. */
 973                         bp = tmp_sum;
 974                 }
 975                 if (first_hlink_ndx >= flist->ndx_start) {
 976                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 977                         memcpy(bp, F_SUM(first), checksum_len);
 978                 } else
 979                         read_buf(f, bp, checksum_len);
 980         }
 981
 982 #ifdef SUPPORT_ACLS
 983         if (preserve_acls && !S_ISLNK(mode))
 984                 receive_acl(file, f);
 985 #endif
 986 #ifdef SUPPORT_XATTRS
 987         if (preserve_xattrs)
 988                 receive_xattr(file, f );
 989 #endif
 990
 991         if (S_ISREG(mode) || S_ISLNK(mode))
 992                 stats.total_size += file_length;
 993
 994         return file;
 995 }
 996
 997 /* Create a file_struct for a named file by reading its stat() information
 998  * and performing extensive checks against global options.
 999  *
1000  * Returns a pointer to the new file struct, or NULL if there was an error
1001  * or this file should be excluded. */
1002 struct file_struct *make_file(const char *fname, struct file_list *flist,
1003                               STRUCT_STAT *stp, int flags, int filter_level)
1004 {
1005         static char *lastdir;
1006         static int lastdir_len = -1;
1007         struct file_struct *file;
1008         char thisname[MAXPATHLEN];
1009         char linkname[MAXPATHLEN];
1010         int alloc_len, basename_len, linkname_len;
1011         int extra_len = file_extra_cnt * EXTRA_LEN;
1012         const char *basename;
1013         alloc_pool_t *pool;
1014         STRUCT_STAT st;
1015         char *bp;
1016
1017         if (strlcpy(thisname, fname, sizeof thisname) >= sizeof thisname) {
1018                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
1019                 return NULL;
1020         }
1021         clean_fname(thisname, 0);
1022         if (sanitize_paths)
1023                 sanitize_path(thisname, thisname, "", 0);
1024
1025         if (stp && S_ISDIR(stp->st_mode)) {
1026                 st = *stp; /* Needed for "symlink/." with --relative. */
1027                 *linkname = '\0'; /* make IBM code checker happy */
1028         } else if (readlink_stat(thisname, &st, linkname) != 0) {
1029                 int save_errno = errno;
1030                 /* See if file is excluded before reporting an error. */
1031                 if (filter_level != NO_FILTERS
1032                  && (is_excluded(thisname, 0, filter_level)
1033                   || is_excluded(thisname, 1, filter_level))) {
1034                         if (ignore_perishable && save_errno != ENOENT)
1035                                 non_perishable_cnt++;
1036                         return NULL;
1037                 }
1038                 if (save_errno == ENOENT) {
1039 #ifdef SUPPORT_LINKS
1040                         /* Avoid "vanished" error if symlink points nowhere. */
1041                         if (copy_links && x_lstat(thisname, &st, NULL) == 0
1042                             && S_ISLNK(st.st_mode)) {
1043                                 io_error |= IOERR_GENERAL;
1044                                 rprintf(FERROR_XFER, "symlink has no referent: %s\n",
1045                                         full_fname(thisname));
1046                         } else
1047 #endif
1048                         {
1049                                 enum logcode c = am_daemon && protocol_version < 28
1050                                                ? FERROR : FWARNING;
1051                                 io_error |= IOERR_VANISHED;
1052                                 rprintf(c, "file has vanished: %s\n",
1053                                         full_fname(thisname));
1054                         }
1055                 } else {
1056                         io_error |= IOERR_GENERAL;
1057                         rsyserr(FERROR_XFER, save_errno, "readlink %s failed",
1058                                 full_fname(thisname));
1059                 }
1060                 return NULL;
1061         }
1062
1063         /* backup.c calls us with filter_level set to NO_FILTERS. */
1064         if (filter_level == NO_FILTERS)
1065                 goto skip_filters;
1066
1067         if (S_ISDIR(st.st_mode)) {
1068                 if (!xfer_dirs) {
1069                         rprintf(FINFO, "skipping directory %s\n", thisname);
1070                         return NULL;
1071                 }
1072                 /* -x only affects dirs because we need to avoid recursing
1073                  * into a mount-point directory, not to avoid copying a
1074                  * symlinked file if -L (or similar) was specified. */
1075                 if (one_file_system && st.st_dev != filesystem_dev
1076                  && BITS_SETnUNSET(flags, FLAG_CONTENT_DIR, FLAG_TOP_DIR)) {
1077                         if (one_file_system > 1) {
1078                                 if (verbose > 1) {
1079                                         rprintf(FINFO,
1080                                             "[%s] skipping mount-point dir %s\n",
1081                                             who_am_i(), thisname);
1082                                 }
1083                                 return NULL;
1084                         }
1085                         flags |= FLAG_MOUNT_DIR;
1086                         flags &= ~FLAG_CONTENT_DIR;
1087                 }
1088         } else
1089                 flags &= ~FLAG_CONTENT_DIR;
1090
1091         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level)) {
1092                 if (ignore_perishable)
1093                         non_perishable_cnt++;
1094                 return NULL;
1095         }
1096
1097         if (lp_ignore_nonreadable(module_id)) {
1098 #ifdef SUPPORT_LINKS
1099                 if (!S_ISLNK(st.st_mode))
1100 #endif
1101                         if (access(thisname, R_OK) != 0)
1102                                 return NULL;
1103         }
1104
1105   skip_filters:
1106
1107         /* Only divert a directory in the main transfer. */
1108         if (flist) {
1109                 if (flist->prev && S_ISDIR(st.st_mode)
1110                  && flags & FLAG_DIVERT_DIRS) {
1111                         /* Room for parent/sibling/next-child info. */
1112                         extra_len += DIRNODE_EXTRA_CNT * EXTRA_LEN;
1113                         if (relative_paths)
1114                                 extra_len += PTR_EXTRA_CNT * EXTRA_LEN;
1115                         pool = dir_flist->file_pool;
1116                 } else
1117                         pool = flist->file_pool;
1118         } else
1119                 pool = NULL;
1120
1121         if (verbose > 2) {
1122                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
1123                         who_am_i(), thisname, filter_level);
1124         }
1125
1126         if ((basename = strrchr(thisname, '/')) != NULL) {
1127                 int len = basename++ - thisname;
1128                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
1129                         lastdir = new_array(char, len + 1);
1130                         memcpy(lastdir, thisname, len);
1131                         lastdir[len] = '\0';
1132                         lastdir_len = len;
1133                 }
1134         } else
1135                 basename = thisname;
1136         basename_len = strlen(basename) + 1; /* count the '\0' */
1137
1138 #ifdef SUPPORT_LINKS
1139         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
1140 #else
1141         linkname_len = 0;
1142 #endif
1143
1144         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
1145                 extra_len += EXTRA_LEN;
1146
1147 #if EXTRA_ROUNDING > 0
1148         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
1149                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
1150 #endif
1151
1152         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
1153                   + linkname_len;
1154         if (pool)
1155                 bp = pool_alloc(pool, alloc_len, "make_file");
1156         else {
1157                 if (!(bp = new_array(char, alloc_len)))
1158                         out_of_memory("make_file");
1159         }
1160
1161         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
1162         bp += extra_len;
1163         file = (struct file_struct *)bp;
1164         bp += FILE_STRUCT_LEN;
1165
1166         memcpy(bp, basename, basename_len);
1167         bp += basename_len + linkname_len; /* skip space for symlink too */
1168
1169 #ifdef SUPPORT_HARD_LINKS
1170         if (preserve_hard_links && flist && flist->prev) {
1171                 if (protocol_version >= 28
1172                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
1173                  : S_ISREG(st.st_mode)) {
1174                         tmp_dev = st.st_dev;
1175                         tmp_ino = st.st_ino;
1176                 } else
1177                         tmp_dev = 0;
1178         }
1179 #endif
1180
1181 #ifdef HAVE_STRUCT_STAT_ST_RDEV
1182         if (IS_DEVICE(st.st_mode) || IS_SPECIAL(st.st_mode)) {
1183                 tmp_rdev = st.st_rdev;
1184                 st.st_size = 0;
1185         }
1186 #endif
1187
1188         file->flags = flags;
1189         file->modtime = st.st_mtime;
1190         file->len32 = (uint32)st.st_size;
1191         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
1192                 file->flags |= FLAG_LENGTH64;
1193                 OPT_EXTRA(file, 0)->unum = (uint32)(st.st_size >> 32);
1194         }
1195         file->mode = st.st_mode;
1196         if (uid_ndx)
1197                 F_OWNER(file) = st.st_uid;
1198         if (gid_ndx)
1199                 F_GROUP(file) = st.st_gid;
1200
1201         if (basename != thisname)
1202                 file->dirname = lastdir;
1203
1204 #ifdef SUPPORT_LINKS
1205         if (linkname_len) {
1206                 bp = (char*)file->basename + basename_len;
1207                 memcpy(bp, linkname, linkname_len);
1208         }
1209 #endif
1210
1211         if (always_checksum && am_sender && S_ISREG(st.st_mode))
1212                 file_checksum(thisname, tmp_sum, st.st_size);
1213
1214         F_PATHNAME(file) = pathname;
1215
1216         /* This code is only used by the receiver when it is building
1217          * a list of files for a delete pass. */
1218         if (keep_dirlinks && linkname_len && flist) {
1219                 STRUCT_STAT st2;
1220                 int save_mode = file->mode;
1221                 file->mode = S_IFDIR; /* Find a directory with our name. */
1222                 if (flist_find(dir_flist, file) >= 0
1223                  && x_stat(thisname, &st2, NULL) == 0 && S_ISDIR(st2.st_mode)) {
1224                         file->modtime = st2.st_mtime;
1225                         file->len32 = 0;
1226                         file->mode = st2.st_mode;
1227                         if (uid_ndx)
1228                                 F_OWNER(file) = st2.st_uid;
1229                         if (gid_ndx)
1230                                 F_GROUP(file) = st2.st_gid;
1231                 } else
1232                         file->mode = save_mode;
1233         }
1234
1235         if (basename_len == 0+1) {
1236                 if (!pool)
1237                         unmake_file(file);
1238                 return NULL;
1239         }
1240
1241         if (unsort_ndx)
1242                 F_NDX(file) = dir_count;
1243
1244         return file;
1245 }
1246
1247 /* Only called for temporary file_struct entries created by make_file(). */
1248 void unmake_file(struct file_struct *file)
1249 {
1250         int extra_cnt = file_extra_cnt + LEN64_BUMP(file);
1251 #if EXTRA_ROUNDING > 0
1252         if (extra_cnt & EXTRA_ROUNDING)
1253                 extra_cnt = (extra_cnt | EXTRA_ROUNDING) + 1;
1254 #endif
1255         free(REQ_EXTRA(file, extra_cnt));
1256 }
1257
1258 static struct file_struct *send_file_name(int f, struct file_list *flist,
1259                                           char *fname, STRUCT_STAT *stp,
1260                                           int flags, int filter_level)
1261 {
1262         struct file_struct *file;
1263 #if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
1264         stat_x sx;
1265 #endif
1266
1267         file = make_file(fname, flist, stp, flags, filter_level);
1268         if (!file)
1269                 return NULL;
1270
1271         if (chmod_modes && !S_ISLNK(file->mode))
1272                 file->mode = tweak_mode(file->mode, chmod_modes);
1273
1274 #ifdef SUPPORT_ACLS
1275         if (preserve_acls && !S_ISLNK(file->mode) && f >= 0) {
1276                 sx.st.st_mode = file->mode;
1277                 sx.acc_acl = sx.def_acl = NULL;
1278                 if (get_acl(fname, &sx) < 0)
1279                         return NULL;
1280         }
1281 #endif
1282 #ifdef SUPPORT_XATTRS
1283         if (preserve_xattrs && f >= 0) {
1284                 sx.xattr = NULL;
1285                 if (get_xattr(fname, &sx) < 0)
1286                         return NULL;
1287         }
1288 #endif
1289
1290         maybe_emit_filelist_progress(flist->used + flist_count_offset);
1291
1292         flist_expand(flist, 1);
1293         flist->files[flist->used++] = file;
1294         if (f >= 0) {
1295                 send_file_entry(f, file, flist->used - 1, flist->ndx_start);
1296 #ifdef SUPPORT_ACLS
1297                 if (preserve_acls && !S_ISLNK(file->mode)) {
1298                         send_acl(&sx, f);
1299                         free_acl(&sx);
1300                 }
1301 #endif
1302 #ifdef SUPPORT_XATTRS
1303                 if (preserve_xattrs) {
1304                         F_XATTR(file) = send_xattr(&sx, f);
1305                         free_xattr(&sx);
1306                 }
1307 #endif
1308         }
1309         return file;
1310 }
1311
1312 static void send_if_directory(int f, struct file_list *flist,
1313                               struct file_struct *file,
1314                               char *fbuf, unsigned int ol,
1315                               int flags)
1316 {
1317         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1318
1319         if (S_ISDIR(file->mode)
1320             && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) {
1321                 void *save_filters;
1322                 unsigned int len = strlen(fbuf);
1323                 if (len > 1 && fbuf[len-1] == '/')
1324                         fbuf[--len] = '\0';
1325                 if (len >= MAXPATHLEN - 1) {
1326                         io_error |= IOERR_GENERAL;
1327                         rprintf(FERROR_XFER, "skipping long-named directory: %s\n",
1328                                 full_fname(fbuf));
1329                         return;
1330                 }
1331                 save_filters = push_local_filters(fbuf, len);
1332                 send_directory(f, flist, fbuf, len, flags);
1333                 pop_local_filters(save_filters);
1334                 fbuf[ol] = '\0';
1335                 if (is_dot_dir)
1336                         fbuf[ol-1] = '.';
1337         }
1338 }
1339
1340 static int file_compare(const void *file1, const void *file2)
1341 {
1342         return f_name_cmp(*(struct file_struct **)file1,
1343                           *(struct file_struct **)file2);
1344 }
1345
1346 /* The guts of a merge-sort algorithm.  This was derived from the glibc
1347  * version, but I (Wayne) changed the merge code to do less copying and
1348  * to require only half the amount of temporary memory. */
1349 static void fsort_tmp(struct file_struct **fp, size_t num,
1350                       struct file_struct **tmp)
1351 {
1352         struct file_struct **f1, **f2, **t;
1353         size_t n1, n2;
1354
1355         n1 = num / 2;
1356         n2 = num - n1;
1357         f1 = fp;
1358         f2 = fp + n1;
1359
1360         if (n1 > 1)
1361                 fsort_tmp(f1, n1, tmp);
1362         if (n2 > 1)
1363                 fsort_tmp(f2, n2, tmp);
1364
1365         while (f_name_cmp(*f1, *f2) <= 0) {
1366                 if (!--n1)
1367                         return;
1368                 f1++;
1369         }
1370
1371         t = tmp;
1372         memcpy(t, f1, n1 * PTR_SIZE);
1373
1374         *f1++ = *f2++, n2--;
1375
1376         while (n1 > 0 && n2 > 0) {
1377                 if (f_name_cmp(*t, *f2) <= 0)
1378                         *f1++ = *t++, n1--;
1379                 else
1380                         *f1++ = *f2++, n2--;
1381         }
1382
1383         if (n1 > 0)
1384                 memcpy(f1, t, n1 * PTR_SIZE);
1385 }
1386
1387 /* This file-struct sorting routine makes sure that any identical names in
1388  * the file list stay in the same order as they were in the original list.
1389  * This is particularly vital in inc_recurse mode where we expect a sort
1390  * on the flist to match the exact order of a sort on the dir_flist. */
1391 static void fsort(struct file_struct **fp, size_t num)
1392 {
1393         if (num <= 1)
1394                 return;
1395
1396         if (use_qsort)
1397                 qsort(fp, num, PTR_SIZE, file_compare);
1398         else {
1399                 struct file_struct **tmp = new_array(struct file_struct *,
1400                                                      (num+1) / 2);
1401                 fsort_tmp(fp, num, tmp);
1402                 free(tmp);
1403         }
1404 }
1405
1406 /* We take an entire set of sibling dirs from the sorted flist and link them
1407  * into the tree, setting the appropriate parent/child/sibling pointers. */
1408 static void add_dirs_to_tree(int parent_ndx, struct file_list *from_flist,
1409                              int dir_cnt)
1410 {
1411         int i;
1412         int32 *dp = NULL;
1413         int32 *parent_dp = parent_ndx < 0 ? NULL
1414                          : F_DIR_NODE_P(dir_flist->sorted[parent_ndx]);
1415
1416         flist_expand(dir_flist, dir_cnt);
1417         dir_flist->sorted = dir_flist->files;
1418
1419         for (i = 0; dir_cnt; i++) {
1420                 struct file_struct *file = from_flist->sorted[i];
1421
1422                 if (!S_ISDIR(file->mode))
1423                         continue;
1424
1425                 dir_flist->files[dir_flist->used++] = file;
1426                 dir_cnt--;
1427
1428                 if (file->basename[0] == '.' && file->basename[1] == '\0')
1429                         continue;
1430
1431                 if (dp)
1432                         DIR_NEXT_SIBLING(dp) = dir_flist->used - 1;
1433                 else if (parent_dp)
1434                         DIR_FIRST_CHILD(parent_dp) = dir_flist->used - 1;
1435                 else
1436                         send_dir_ndx = dir_flist->used - 1;
1437
1438                 dp = F_DIR_NODE_P(file);
1439                 DIR_PARENT(dp) = parent_ndx;
1440                 DIR_FIRST_CHILD(dp) = -1;
1441         }
1442         if (dp)
1443                 DIR_NEXT_SIBLING(dp) = -1;
1444 }
1445
1446 /* This function is normally called by the sender, but the receiving side also
1447  * calls it from get_dirlist() with f set to -1 so that we just construct the
1448  * file list in memory without sending it over the wire.  Also, get_dirlist()
1449  * might call this with f set to -2, which also indicates that local filter
1450  * rules should be ignored. */
1451 static void send_directory(int f, struct file_list *flist, char *fbuf, int len,
1452                            int flags)
1453 {
1454         struct dirent *di;
1455         unsigned remainder;
1456         char *p;
1457         DIR *d;
1458         int divert_dirs = (flags & FLAG_DIVERT_DIRS) != 0;
1459         int start = flist->used;
1460         int filter_level = f == -2 ? SERVER_FILTERS : ALL_FILTERS;
1461
1462         assert(flist != NULL);
1463
1464         if (!(d = opendir(fbuf))) {
1465                 io_error |= IOERR_GENERAL;
1466                 rsyserr(FERROR_XFER, errno, "opendir %s failed", full_fname(fbuf));
1467                 return;
1468         }
1469
1470         p = fbuf + len;
1471         if (len != 1 || *fbuf != '/')
1472                 *p++ = '/';
1473         *p = '\0';
1474         remainder = MAXPATHLEN - (p - fbuf);
1475
1476         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1477                 char *dname = d_name(di);
1478                 if (dname[0] == '.' && (dname[1] == '\0'
1479                     || (dname[1] == '.' && dname[2] == '\0')))
1480                         continue;
1481                 if (strlcpy(p, dname, remainder) >= remainder) {
1482                         io_error |= IOERR_GENERAL;
1483                         rprintf(FINFO,
1484                                 "cannot send long-named file %s\n",
1485                                 full_fname(fbuf));
1486                         continue;
1487                 }
1488                 if (dname[0] == '\0') {
1489                         io_error |= IOERR_GENERAL;
1490                         rprintf(FINFO,
1491                                 "cannot send file with empty name in %s\n",
1492                                 full_fname(fbuf));
1493                         continue;
1494                 }
1495
1496                 send_file_name(f, flist, fbuf, NULL, flags, filter_level);
1497         }
1498
1499         fbuf[len] = '\0';
1500
1501         if (errno) {
1502                 io_error |= IOERR_GENERAL;
1503                 rsyserr(FERROR_XFER, errno, "readdir(%s)", full_fname(fbuf));
1504         }
1505
1506         closedir(d);
1507
1508         if (f >= 0 && recurse && !divert_dirs) {
1509                 int i, end = flist->used - 1;
1510                 /* send_if_directory() bumps flist->used, so use "end". */
1511                 for (i = start; i <= end; i++)
1512                         send_if_directory(f, flist, flist->files[i], fbuf, len, flags);
1513         }
1514 }
1515
1516 static char lastpath[MAXPATHLEN] = "";
1517 static int lastpath_len = 0;
1518 static struct file_struct *lastpath_struct;
1519
1520 static void send_implied_dirs(int f, struct file_list *flist, char *fname,
1521                               char *start, char *limit, int flags, char name_type)
1522 {
1523         struct file_struct *file;
1524         item_list *relname_list;
1525         relnamecache **rnpp;
1526         char *slash;
1527         int len, need_new_dir;
1528
1529         flags = (flags | FLAG_IMPLIED_DIR) & ~(FLAG_TOP_DIR | FLAG_CONTENT_DIR);
1530
1531         if (inc_recurse) {
1532                 if (lastpath_struct && F_PATHNAME(lastpath_struct) == pathname
1533                  && lastpath_len == limit - fname
1534                  && strncmp(lastpath, fname, lastpath_len) == 0)
1535                         need_new_dir = 0;
1536                 else
1537                         need_new_dir = 1;
1538         } else
1539                 need_new_dir = 1;
1540
1541         if (need_new_dir) {
1542                 int save_copy_links = copy_links;
1543                 int save_xfer_dirs = xfer_dirs;
1544
1545                 copy_links = xfer_dirs = 1;
1546
1547                 *limit = '\0';
1548
1549                 for (slash = start; (slash = strchr(slash+1, '/')) != NULL; ) {
1550                         *slash = '\0';
1551                         send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1552                         *slash = '/';
1553                 }
1554
1555                 file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1556                 if (inc_recurse) {
1557                         if (file && !S_ISDIR(file->mode))
1558                                 file = NULL;
1559                         lastpath_struct = file;
1560                 }
1561
1562                 strlcpy(lastpath, fname, sizeof lastpath);
1563                 lastpath_len = limit - fname;
1564
1565                 *limit = '/';
1566
1567                 copy_links = save_copy_links;
1568                 xfer_dirs = save_xfer_dirs;
1569
1570                 if (!inc_recurse)
1571                         return;
1572         }
1573
1574         if (!lastpath_struct)
1575                 return; /* dir must have vanished */
1576
1577         len = strlen(limit+1);
1578         memcpy(&relname_list, F_DIR_RELNAMES_P(lastpath_struct), sizeof relname_list);
1579         if (!relname_list) {
1580                 if (!(relname_list = new0(item_list)))
1581                         out_of_memory("send_implied_dirs");
1582                 memcpy(F_DIR_RELNAMES_P(lastpath_struct), &relname_list, sizeof relname_list);
1583         }
1584         rnpp = EXPAND_ITEM_LIST(relname_list, relnamecache *, 32);
1585         if (!(*rnpp = (relnamecache*)new_array(char, sizeof (relnamecache) + len)))
1586                 out_of_memory("send_implied_dirs");
1587         (*rnpp)->name_type = name_type;
1588         strlcpy((*rnpp)->fname, limit+1, len + 1);
1589 }
1590
1591 static void send1extra(int f, struct file_struct *file, struct file_list *flist)
1592 {
1593         char fbuf[MAXPATHLEN];
1594         item_list *relname_list;
1595         int len, dlen, flags = FLAG_DIVERT_DIRS | FLAG_CONTENT_DIR;
1596         size_t j;
1597
1598         f_name(file, fbuf);
1599         dlen = strlen(fbuf);
1600
1601         if (F_PATHNAME(file) != pathname) {
1602                 if (!push_pathname(F_PATHNAME(file), -1))
1603                         exit_cleanup(RERR_FILESELECT);
1604         }
1605
1606         change_local_filter_dir(fbuf, dlen, send_dir_depth);
1607
1608         if (file->flags & FLAG_CONTENT_DIR) {
1609                 if (one_file_system) {
1610                         STRUCT_STAT st;
1611                         if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1612                                 io_error |= IOERR_GENERAL;
1613                                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1614                                         full_fname(fbuf));
1615                                 return;
1616                         }
1617                         filesystem_dev = st.st_dev;
1618                 }
1619                 send_directory(f, flist, fbuf, dlen, flags);
1620         }
1621
1622         if (!relative_paths)
1623                 return;
1624
1625         memcpy(&relname_list, F_DIR_RELNAMES_P(file), sizeof relname_list);
1626         if (!relname_list)
1627                 return;
1628
1629         for (j = 0; j < relname_list->count; j++) {
1630                 char *slash;
1631                 relnamecache *rnp = ((relnamecache**)relname_list->items)[j];
1632                 char name_type = rnp->name_type;
1633
1634                 fbuf[dlen] = '/';
1635                 len = strlcpy(fbuf + dlen + 1, rnp->fname, sizeof fbuf - dlen - 1);
1636                 free(rnp);
1637                 if (len >= (int)sizeof fbuf)
1638                         continue; /* Impossible... */
1639
1640                 slash = strchr(fbuf+dlen+1, '/');
1641                 if (slash) {
1642                         send_implied_dirs(f, flist, fbuf, fbuf+dlen+1, slash, flags, name_type);
1643                         continue;
1644                 }
1645
1646                 if (name_type != NORMAL_NAME) {
1647                         STRUCT_STAT st;
1648                         if (link_stat(fbuf, &st, 1) != 0) {
1649                                 io_error |= IOERR_GENERAL;
1650                                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1651                                         full_fname(fbuf));
1652                                 continue;
1653                         }
1654                         send_file_name(f, flist, fbuf, &st, FLAG_TOP_DIR | flags, ALL_FILTERS);
1655                 } else
1656                         send_file_name(f, flist, fbuf, NULL, FLAG_TOP_DIR | flags, ALL_FILTERS);
1657         }
1658
1659         free(relname_list);
1660 }
1661
1662 void send_extra_file_list(int f, int at_least)
1663 {
1664         struct file_list *flist;
1665         int64 start_write;
1666         uint16 prev_flags;
1667         int old_cnt, save_io_error = io_error;
1668
1669         if (flist_eof)
1670                 return;
1671
1672         /* Keep sending data until we have the requested number of
1673          * files in the upcoming file-lists. */
1674         old_cnt = cur_flist->used;
1675         for (flist = first_flist; flist != cur_flist; flist = flist->next)
1676                 old_cnt += flist->used;
1677         while (file_total - old_cnt < at_least) {
1678                 struct file_struct *file = dir_flist->sorted[send_dir_ndx];
1679                 int dir_ndx, dstart = dir_count;
1680                 const char *pathname = F_PATHNAME(file);
1681                 int32 *dp;
1682
1683                 flist = flist_new(0, "send_extra_file_list");
1684                 start_write = stats.total_written;
1685
1686                 if (unsort_ndx)
1687                         dir_ndx = F_NDX(file);
1688                 else
1689                         dir_ndx = send_dir_ndx;
1690                 write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
1691                 flist->parent_ndx = dir_ndx;
1692
1693                 send1extra(f, file, flist);
1694                 prev_flags = file->flags;
1695                 dp = F_DIR_NODE_P(file);
1696
1697                 /* If there are any duplicate directory names that follow, we
1698                  * send all the dirs together in one file-list.  The dir_flist
1699                  * tree links all the child subdirs onto the last dup dir. */
1700                 while ((dir_ndx = DIR_NEXT_SIBLING(dp)) >= 0
1701                     && dir_flist->sorted[dir_ndx]->flags & FLAG_DUPLICATE) {
1702                         send_dir_ndx = dir_ndx;
1703                         file = dir_flist->sorted[dir_ndx];
1704                         /* Try to avoid some duplicate scanning of identical dirs. */
1705                         if (F_PATHNAME(file) == pathname && prev_flags & FLAG_CONTENT_DIR)
1706                                 file->flags &= ~FLAG_CONTENT_DIR;
1707                         send1extra(f, file, flist);
1708                         prev_flags = file->flags;
1709                         dp = F_DIR_NODE_P(file);
1710                 }
1711
1712                 write_byte(f, 0);
1713
1714                 if (need_unsorted_flist) {
1715                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
1716                                 out_of_memory("send_extra_file_list");
1717                         memcpy(flist->sorted, flist->files,
1718                                flist->used * sizeof (struct file_struct*));
1719                 } else
1720                         flist->sorted = flist->files;
1721
1722                 flist_sort_and_clean(flist, 0);
1723
1724                 add_dirs_to_tree(send_dir_ndx, flist, dir_count - dstart);
1725                 flist_done_allocating(flist);
1726
1727                 file_total += flist->used;
1728                 stats.flist_size += stats.total_written - start_write;
1729                 stats.num_files += flist->used;
1730                 if (verbose > 3)
1731                         output_flist(flist);
1732
1733                 if (DIR_FIRST_CHILD(dp) >= 0) {
1734                         send_dir_ndx = DIR_FIRST_CHILD(dp);
1735                         send_dir_depth++;
1736                 } else {
1737                         while (DIR_NEXT_SIBLING(dp) < 0) {
1738                                 if ((send_dir_ndx = DIR_PARENT(dp)) < 0) {
1739                                         write_ndx(f, NDX_FLIST_EOF);
1740                                         flist_eof = 1;
1741                                         change_local_filter_dir(NULL, 0, 0);
1742                                         goto finish;
1743                                 }
1744                                 send_dir_depth--;
1745                                 file = dir_flist->sorted[send_dir_ndx];
1746                                 dp = F_DIR_NODE_P(file);
1747                         }
1748                         send_dir_ndx = DIR_NEXT_SIBLING(dp);
1749                 }
1750         }
1751
1752   finish:
1753         if (io_error != save_io_error && !ignore_errors)
1754                 send_msg_int(MSG_IO_ERROR, io_error);
1755 }
1756
1757 struct file_list *send_file_list(int f, int argc, char *argv[])
1758 {
1759         static const char *lastdir;
1760         static int lastdir_len = -1;
1761         int len, dirlen;
1762         STRUCT_STAT st;
1763         char *p, *dir;
1764         struct file_list *flist;
1765         struct timeval start_tv, end_tv;
1766         int64 start_write;
1767         int use_ff_fd = 0;
1768         int disable_buffering;
1769         int flags = recurse ? FLAG_CONTENT_DIR : 0;
1770         int reading_remotely = filesfrom_host != NULL;
1771         int rl_flags = (reading_remotely ? 0 : RL_DUMP_COMMENTS)
1772 #ifdef ICONV_OPTION
1773                      | (filesfrom_convert ? RL_CONVERT : 0)
1774 #endif
1775                      | (eol_nulls || reading_remotely ? RL_EOL_NULLS : 0);
1776
1777         rprintf(FLOG, "building file list\n");
1778         if (show_filelist_p())
1779                 start_filelist_progress("building file list");
1780         else if (inc_recurse && verbose && !am_server)
1781                 rprintf(FCLIENT, "sending incremental file list\n");
1782
1783         start_write = stats.total_written;
1784         gettimeofday(&start_tv, NULL);
1785
1786         if (relative_paths && protocol_version >= 30)
1787                 implied_dirs = 1; /* We send flagged implied dirs */
1788
1789 #ifdef SUPPORT_HARD_LINKS
1790         if (preserve_hard_links && protocol_version >= 30 && !cur_flist)
1791                 init_hard_links();
1792 #endif
1793
1794         flist = cur_flist = flist_new(0, "send_file_list");
1795         if (inc_recurse) {
1796                 dir_flist = flist_new(FLIST_TEMP, "send_file_list");
1797                 flags |= FLAG_DIVERT_DIRS;
1798         } else
1799                 dir_flist = cur_flist;
1800
1801         disable_buffering = io_start_buffering_out(f);
1802         if (filesfrom_fd >= 0) {
1803                 if (argv[0] && !push_dir(argv[0], 0)) {
1804                         rsyserr(FERROR_XFER, errno, "push_dir %s failed in %s",
1805                                 full_fname(argv[0]), curr_dir);
1806                         exit_cleanup(RERR_FILESELECT);
1807                 }
1808                 use_ff_fd = 1;
1809         }
1810
1811         while (1) {
1812                 char fbuf[MAXPATHLEN], *fn, name_type;
1813
1814                 if (use_ff_fd) {
1815                         if (read_line(filesfrom_fd, fbuf, sizeof fbuf, rl_flags) == 0)
1816                                 break;
1817                         sanitize_path(fbuf, fbuf, "", 0);
1818                 } else {
1819                         if (argc-- == 0)
1820                                 break;
1821                         strlcpy(fbuf, *argv++, MAXPATHLEN);
1822                         if (sanitize_paths)
1823                                 sanitize_path(fbuf, fbuf, "", 0);
1824                 }
1825
1826                 len = strlen(fbuf);
1827                 if (relative_paths) {
1828                         /* We clean up fbuf below. */
1829                         name_type = NORMAL_NAME;
1830                 } else if (!len || fbuf[len - 1] == '/') {
1831                         if (len == 2 && fbuf[0] == '.') {
1832                                 /* Turn "./" into just "." rather than "./." */
1833                                 fbuf[1] = '\0';
1834                         } else {
1835                                 if (len + 1 >= MAXPATHLEN)
1836                                         overflow_exit("send_file_list");
1837                                 fbuf[len++] = '.';
1838                                 fbuf[len] = '\0';
1839                         }
1840                         name_type = DOT_NAME;
1841                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
1842                     && (len == 2 || fbuf[len-3] == '/')) {
1843                         if (len + 2 >= MAXPATHLEN)
1844                                 overflow_exit("send_file_list");
1845                         fbuf[len++] = '/';
1846                         fbuf[len++] = '.';
1847                         fbuf[len] = '\0';
1848                         name_type = DOT_NAME;
1849                 } else if (fbuf[len-1] == '.' && (len == 1 || fbuf[len-2] == '/'))
1850                         name_type = DOT_NAME;
1851                 else
1852                         name_type = NORMAL_NAME;
1853
1854                 dir = NULL;
1855
1856                 if (!relative_paths) {
1857                         p = strrchr(fbuf, '/');
1858                         if (p) {
1859                                 *p = '\0';
1860                                 if (p == fbuf)
1861                                         dir = "/";
1862                                 else
1863                                         dir = fbuf;
1864                                 len -= p - fbuf + 1;
1865                                 fn = p + 1;
1866                         } else
1867                                 fn = fbuf;
1868                 } else {
1869                         if ((p = strstr(fbuf, "/./")) != NULL) {
1870                                 *p = '\0';
1871                                 if (p == fbuf)
1872                                         dir = "/";
1873                                 else
1874                                         dir = fbuf;
1875                                 fn = p + 3;
1876                                 while (*fn == '/')
1877                                         fn++;
1878                                 if (!*fn)
1879                                         *--fn = '\0'; /* ensure room for '.' */
1880                         } else
1881                                 fn = fbuf;
1882                         len = clean_fname(fn, CFN_KEEP_LEADING_DOT_DIR
1883                                             | CFN_KEEP_TRAILING_SLASH
1884                                             | CFN_DROP_TRAILING_DOT_DIR);
1885                         if (len == 1) {
1886                                 if (fn[0] == '/') {
1887                                         fn = "/.";
1888                                         len = 2;
1889                                         name_type = DOT_NAME;
1890                                 } else if (fn[0] == '.')
1891                                         name_type = DOT_NAME;
1892                         } else if (fn[len-1] == '/') {
1893                                 fn[--len] = '\0';
1894                                 if (len == 1 && *fn == '.')
1895                                         name_type = DOT_NAME;
1896                                 else
1897                                         name_type = SLASH_ENDING_NAME;
1898                         }
1899                         /* Reject a ".." dir in the active part of the path. */
1900                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
1901                                 if ((p[2] == '/' || p[2] == '\0')
1902                                  && (p == fn || p[-1] == '/')) {
1903                                         rprintf(FERROR,
1904                                             "found \"..\" dir in relative path: %s\n",
1905                                             fn);
1906                                         exit_cleanup(RERR_SYNTAX);
1907                                 }
1908                         }
1909                 }
1910
1911                 if (!*fn) {
1912                         len = 1;
1913                         fn = ".";
1914                         name_type = DOT_NAME;
1915                 }
1916
1917                 dirlen = dir ? strlen(dir) : 0;
1918                 if (dirlen != lastdir_len || memcmp(lastdir, dir, dirlen) != 0) {
1919                         if (!push_pathname(dir ? strdup(dir) : NULL, dirlen))
1920                                 continue;
1921                         lastdir = pathname;
1922                         lastdir_len = pathname_len;
1923                 } else if (!push_pathname(lastdir, lastdir_len))
1924                         continue;
1925
1926                 if (fn != fbuf)
1927                         memmove(fbuf, fn, len + 1);
1928
1929                 if (link_stat(fbuf, &st, copy_dirlinks || name_type != NORMAL_NAME) != 0) {
1930                         io_error |= IOERR_GENERAL;
1931                         rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1932                                 full_fname(fbuf));
1933                         continue;
1934                 }
1935
1936                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
1937                         rprintf(FINFO, "skipping directory %s\n", fbuf);
1938                         continue;
1939                 }
1940
1941                 if (inc_recurse && relative_paths && *fbuf) {
1942                         if ((p = strchr(fbuf+1, '/')) != NULL) {
1943                                 if (p - fbuf == 1 && *fbuf == '.') {
1944                                         if ((fn = strchr(p+1, '/')) != NULL)
1945                                                 p = fn;
1946                                 } else
1947                                         fn = p;
1948                                 send_implied_dirs(f, flist, fbuf, fbuf, p, flags, name_type);
1949                                 if (fn == p)
1950                                         continue;
1951                         }
1952                 } else if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
1953                         /* Send the implied directories at the start of the
1954                          * source spec, so we get their permissions right. */
1955                         char *lp = lastpath, *slash = fbuf;
1956                         *p = '\0';
1957                         /* Skip any initial directories in our path that we
1958                          * have in common with lastpath. */
1959                         for (fn = fbuf; *fn && *lp == *fn; lp++, fn++) {
1960                                 if (*fn == '/')
1961                                         slash = fn;
1962                         }
1963                         *p = '/';
1964                         if (fn != p || (*lp && *lp != '/'))
1965                                 send_implied_dirs(f, flist, fbuf, slash, p, flags, 0);
1966                 }
1967
1968                 if (one_file_system)
1969                         filesystem_dev = st.st_dev;
1970
1971                 if (recurse || (xfer_dirs && name_type != NORMAL_NAME)) {
1972                         struct file_struct *file;
1973                         int top_flags = FLAG_TOP_DIR | FLAG_CONTENT_DIR | flags;
1974                         file = send_file_name(f, flist, fbuf, &st,
1975                                               top_flags, ALL_FILTERS);
1976                         if (inc_recurse) {
1977                                 if (name_type == DOT_NAME && file) {
1978                                         if (send_dir_depth < 0) {
1979                                                 send_dir_depth = 0;
1980                                                 change_local_filter_dir(fbuf, len, send_dir_depth);
1981                                         }
1982                                         send_directory(f, flist, fbuf, len, flags);
1983                                 }
1984                         } else if (file)
1985                                 send_if_directory(f, flist, file, fbuf, len, flags);
1986                 } else
1987                         send_file_name(f, flist, fbuf, &st, flags, ALL_FILTERS);
1988         }
1989
1990         gettimeofday(&end_tv, NULL);
1991         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
1992                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
1993         if (stats.flist_buildtime == 0)
1994                 stats.flist_buildtime = 1;
1995         start_tv = end_tv;
1996
1997         write_byte(f, 0); /* Indicate end of file list */
1998
1999 #ifdef SUPPORT_HARD_LINKS
2000         if (preserve_hard_links && protocol_version >= 30 && !inc_recurse)
2001                 idev_destroy();
2002 #endif
2003
2004         if (show_filelist_p())
2005                 finish_filelist_progress(flist);
2006
2007         gettimeofday(&end_tv, NULL);
2008         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2009                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2010
2011         /* When converting names, both sides keep an unsorted file-list array
2012          * because the names will differ on the sending and receiving sides
2013          * (both sides will use the unsorted index number for each item). */
2014
2015         /* Sort the list without removing any duplicates.  This allows the
2016          * receiving side to ask for whatever name it kept.  For incremental
2017          * recursion mode, the sender marks duplicate dirs so that it can
2018          * send them together in a single file-list. */
2019         if (need_unsorted_flist) {
2020                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2021                         out_of_memory("send_file_list");
2022                 memcpy(flist->sorted, flist->files,
2023                        flist->used * sizeof (struct file_struct*));
2024         } else
2025                 flist->sorted = flist->files;
2026         flist_sort_and_clean(flist, 0);
2027         file_total += flist->used;
2028
2029         if (!numeric_ids && !inc_recurse)
2030                 send_id_list(f);
2031
2032         /* send the io_error flag */
2033         if (protocol_version < 30)
2034                 write_int(f, ignore_errors ? 0 : io_error);
2035         else if (io_error && !ignore_errors)
2036                 send_msg_int(MSG_IO_ERROR, io_error);
2037
2038         if (disable_buffering)
2039                 io_end_buffering_out();
2040
2041         stats.flist_size = stats.total_written - start_write;
2042         stats.num_files = flist->used;
2043
2044         if (verbose > 3)
2045                 output_flist(flist);
2046
2047         if (verbose > 2)
2048                 rprintf(FINFO, "send_file_list done\n");
2049
2050         if (inc_recurse) {
2051                 send_dir_depth = 1;
2052                 add_dirs_to_tree(-1, flist, dir_count);
2053                 if (!file_total || strcmp(flist->sorted[0]->basename, ".") != 0)
2054                         flist->parent_ndx = -1;
2055                 flist_done_allocating(flist);
2056                 if (send_dir_ndx < 0) {
2057                         write_ndx(f, NDX_FLIST_EOF);
2058                         flist_eof = 1;
2059                 }
2060                 else if (file_total == 1) {
2061                         /* If we're creating incremental file-lists and there
2062                          * was just 1 item in the first file-list, send 1 more
2063                          * file-list to check if this is a 1-file xfer. */
2064                         send_extra_file_list(f, 1);
2065                 }
2066         }
2067
2068         return flist;
2069 }
2070
2071 struct file_list *recv_file_list(int f)
2072 {
2073         struct file_list *flist;
2074         int dstart, flags;
2075         int64 start_read;
2076
2077         if (!first_flist)
2078                 rprintf(FLOG, "receiving file list\n");
2079         if (show_filelist_p())
2080                 start_filelist_progress("receiving file list");
2081         else if (inc_recurse && verbose && !am_server && !first_flist)
2082                 rprintf(FCLIENT, "receiving incremental file list\n");
2083
2084         start_read = stats.total_read;
2085
2086 #ifdef SUPPORT_HARD_LINKS
2087         if (preserve_hard_links && !first_flist)
2088                 init_hard_links();
2089 #endif
2090
2091         flist = flist_new(0, "recv_file_list");
2092
2093         if (inc_recurse) {
2094                 if (flist->ndx_start == 1)
2095                         dir_flist = flist_new(FLIST_TEMP, "recv_file_list");
2096                 dstart = dir_flist->used;
2097         } else {
2098                 dir_flist = flist;
2099                 dstart = 0;
2100         }
2101
2102         while ((flags = read_byte(f)) != 0) {
2103                 struct file_struct *file;
2104
2105                 flist_expand(flist, 1);
2106
2107                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
2108                         flags |= read_byte(f) << 8;
2109                 file = recv_file_entry(flist, flags, f);
2110
2111                 if (inc_recurse && S_ISDIR(file->mode)) {
2112                         flist_expand(dir_flist, 1);
2113                         dir_flist->files[dir_flist->used++] = file;
2114                 }
2115
2116                 flist->files[flist->used++] = file;
2117
2118                 maybe_emit_filelist_progress(flist->used);
2119
2120                 if (verbose > 2) {
2121                         rprintf(FINFO, "recv_file_name(%s)\n",
2122                                 f_name(file, NULL));
2123                 }
2124         }
2125         file_total += flist->used;
2126
2127         if (verbose > 2)
2128                 rprintf(FINFO, "received %d names\n", flist->used);
2129
2130         if (show_filelist_p())
2131                 finish_filelist_progress(flist);
2132
2133         if (need_unsorted_flist) {
2134                 /* Create an extra array of index pointers that we can sort for
2135                  * the generator's use (for wading through the files in sorted
2136                  * order and for calling flist_find()).  We keep the "files"
2137                  * list unsorted for our exchange of index numbers with the
2138                  * other side (since their names may not sort the same). */
2139                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2140                         out_of_memory("recv_file_list");
2141                 memcpy(flist->sorted, flist->files,
2142                        flist->used * sizeof (struct file_struct*));
2143                 if (inc_recurse && dir_flist->used > dstart) {
2144                         static int dir_flist_malloced = 0;
2145                         if (dir_flist_malloced < dir_flist->malloced) {
2146                                 dir_flist->sorted = realloc_array(dir_flist->sorted,
2147                                                         struct file_struct *,
2148                                                         dir_flist->malloced);
2149                                 dir_flist_malloced = dir_flist->malloced;
2150                         }
2151                         memcpy(dir_flist->sorted + dstart, dir_flist->files + dstart,
2152                                (dir_flist->used - dstart) * sizeof (struct file_struct*));
2153                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2154                 }
2155         } else {
2156                 flist->sorted = flist->files;
2157                 if (inc_recurse && dir_flist->used > dstart) {
2158                         dir_flist->sorted = dir_flist->files;
2159                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2160                 }
2161         }
2162
2163         if (inc_recurse)
2164                 flist_done_allocating(flist);
2165         else if (f >= 0)
2166                 recv_id_list(f, flist);
2167
2168         flist_sort_and_clean(flist, relative_paths);
2169
2170         if (protocol_version < 30) {
2171                 /* Recv the io_error flag */
2172                 if (ignore_errors)
2173                         read_int(f);
2174                 else
2175                         io_error |= read_int(f);
2176         } else if (inc_recurse && flist->ndx_start == 1) {
2177                 if (!file_total || strcmp(flist->sorted[0]->basename, ".") != 0)
2178                         flist->parent_ndx = -1;
2179         }
2180
2181         if (verbose > 3)
2182                 output_flist(flist);
2183
2184         if (verbose > 2)
2185                 rprintf(FINFO, "recv_file_list done\n");
2186
2187         stats.flist_size += stats.total_read - start_read;
2188         stats.num_files += flist->used;
2189
2190         return flist;
2191 }
2192
2193 /* This is only used once by the receiver if the very first file-list
2194  * has exactly one item in it. */
2195 void recv_additional_file_list(int f)
2196 {
2197         struct file_list *flist;
2198         int ndx = read_ndx(f);
2199         if (ndx == NDX_FLIST_EOF) {
2200                 flist_eof = 1;
2201                 change_local_filter_dir(NULL, 0, 0);
2202         } else {
2203                 ndx = NDX_FLIST_OFFSET - ndx;
2204                 if (ndx < 0 || ndx >= dir_flist->used) {
2205                         ndx = NDX_FLIST_OFFSET - ndx;
2206                         rprintf(FERROR,
2207                                 "[%s] Invalid dir index: %d (%d - %d)\n",
2208                                 who_am_i(), ndx, NDX_FLIST_OFFSET,
2209                                 NDX_FLIST_OFFSET - dir_flist->used + 1);
2210                         exit_cleanup(RERR_PROTOCOL);
2211                 }
2212                 if (verbose > 3) {
2213                         rprintf(FINFO, "[%s] receiving flist for dir %d\n",
2214                                 who_am_i(), ndx);
2215                 }
2216                 flist = recv_file_list(f);
2217                 flist->parent_ndx = ndx;
2218         }
2219 }
2220
2221 /* Search for an identically-named item in the file list.  Note that the
2222  * items must agree in their directory-ness, or no match is returned. */
2223 int flist_find(struct file_list *flist, struct file_struct *f)
2224 {
2225         int low = flist->low, high = flist->high;
2226         int diff, mid, mid_up;
2227
2228         while (low <= high) {
2229                 mid = (low + high) / 2;
2230                 if (F_IS_ACTIVE(flist->sorted[mid]))
2231                         mid_up = mid;
2232                 else {
2233                         /* Scan for the next non-empty entry using the cached
2234                          * distance values.  If the value isn't fully up-to-
2235                          * date, update it. */
2236                         mid_up = mid + F_DEPTH(flist->sorted[mid]);
2237                         if (!F_IS_ACTIVE(flist->sorted[mid_up])) {
2238                                 do {
2239                                     mid_up += F_DEPTH(flist->sorted[mid_up]);
2240                                 } while (!F_IS_ACTIVE(flist->sorted[mid_up]));
2241                                 F_DEPTH(flist->sorted[mid]) = mid_up - mid;
2242                         }
2243                         if (mid_up > high) {
2244                                 /* If there's nothing left above us, set high to
2245                                  * a non-empty entry below us and continue. */
2246                                 high = mid - (int)flist->sorted[mid]->len32;
2247                                 if (!F_IS_ACTIVE(flist->sorted[high])) {
2248                                         do {
2249                                             high -= (int)flist->sorted[high]->len32;
2250                                         } while (!F_IS_ACTIVE(flist->sorted[high]));
2251                                         flist->sorted[mid]->len32 = mid - high;
2252                                 }
2253                                 continue;
2254                         }
2255                 }
2256                 diff = f_name_cmp(flist->sorted[mid_up], f);
2257                 if (diff == 0) {
2258                         if (protocol_version < 29
2259                             && S_ISDIR(flist->sorted[mid_up]->mode)
2260                             != S_ISDIR(f->mode))
2261                                 return -1;
2262                         return mid_up;
2263                 }
2264                 if (diff < 0)
2265                         low = mid_up + 1;
2266                 else
2267                         high = mid - 1;
2268         }
2269         return -1;
2270 }
2271
2272 /*
2273  * Free up any resources a file_struct has allocated
2274  * and clear the file.
2275  */
2276 void clear_file(struct file_struct *file)
2277 {
2278         /* The +1 zeros out the first char of the basename. */
2279         memset(file, 0, FILE_STRUCT_LEN + 1);
2280         /* In an empty entry, F_DEPTH() is an offset to the next non-empty
2281          * entry.  Likewise for len32 in the opposite direction.  We assume
2282          * that we're alone for now since flist_find() will adjust the counts
2283          * it runs into that aren't up-to-date. */
2284         file->len32 = F_DEPTH(file) = 1;
2285 }
2286
2287 /* Allocate a new file list. */
2288 struct file_list *flist_new(int flags, char *msg)
2289 {
2290         struct file_list *flist;
2291
2292         if (!(flist = new0(struct file_list)))
2293                 out_of_memory(msg);
2294
2295         if (flags & FLIST_TEMP) {
2296                 if (!(flist->file_pool = pool_create(SMALL_EXTENT, 0,
2297                                                 out_of_memory, POOL_INTERN)))
2298                         out_of_memory(msg);
2299         } else {
2300                 /* This is a doubly linked list with prev looping back to
2301                  * the end of the list, but the last next pointer is NULL. */
2302                 if (!first_flist) {
2303                         flist->file_pool = pool_create(NORMAL_EXTENT, 0,
2304                                                 out_of_memory, POOL_INTERN);
2305                         if (!flist->file_pool)
2306                                 out_of_memory(msg);
2307
2308                         flist->ndx_start = flist->flist_num = inc_recurse ? 1 : 0;
2309
2310                         first_flist = cur_flist = flist->prev = flist;
2311                 } else {
2312                         struct file_list *prev = first_flist->prev;
2313
2314                         flist->file_pool = first_flist->file_pool;
2315
2316                         flist->ndx_start = prev->ndx_start + prev->used + 1;
2317                         flist->flist_num = prev->flist_num + 1;
2318
2319                         flist->prev = prev;
2320                         prev->next = first_flist->prev = flist;
2321                 }
2322                 flist->pool_boundary = pool_boundary(flist->file_pool, 0);
2323                 flist_cnt++;
2324         }
2325
2326         return flist;
2327 }
2328
2329 /* Free up all elements in a flist. */
2330 void flist_free(struct file_list *flist)
2331 {
2332         if (!flist->prev) {
2333                 /* Was FLIST_TEMP dir-list. */
2334         } else if (flist == flist->prev) {
2335                 first_flist = cur_flist = NULL;
2336                 file_total = 0;
2337                 flist_cnt = 0;
2338         } else {
2339                 if (flist == cur_flist)
2340                         cur_flist = flist->next;
2341                 if (flist == first_flist)
2342                         first_flist = first_flist->next;
2343                 else {
2344                         flist->prev->next = flist->next;
2345                         if (!flist->next)
2346                                 flist->next = first_flist;
2347                 }
2348                 flist->next->prev = flist->prev;
2349                 file_total -= flist->used;
2350                 flist_cnt--;
2351         }
2352
2353         if (!flist->prev || !flist_cnt)
2354                 pool_destroy(flist->file_pool);
2355         else
2356                 pool_free_old(flist->file_pool, flist->pool_boundary);
2357
2358         if (flist->sorted && flist->sorted != flist->files)
2359                 free(flist->sorted);
2360         free(flist->files);
2361         free(flist);
2362 }
2363
2364 /* This routine ensures we don't have any duplicate names in our file list.
2365  * duplicate names can cause corruption because of the pipelining. */
2366 static void flist_sort_and_clean(struct file_list *flist, int strip_root)
2367 {
2368         char fbuf[MAXPATHLEN];
2369         int i, prev_i;
2370
2371         if (!flist)
2372                 return;
2373         if (flist->used == 0) {
2374                 flist->high = -1;
2375                 flist->low = 0;
2376                 return;
2377         }
2378
2379         fsort(flist->sorted, flist->used);
2380
2381         if (!am_sender || inc_recurse) {
2382                 for (i = prev_i = 0; i < flist->used; i++) {
2383                         if (F_IS_ACTIVE(flist->sorted[i])) {
2384                                 prev_i = i;
2385                                 break;
2386                         }
2387                 }
2388                 flist->low = prev_i;
2389         } else {
2390                 i = prev_i = flist->used - 1;
2391                 flist->low = 0;
2392         }
2393
2394         while (++i < flist->used) {
2395                 int j;
2396                 struct file_struct *file = flist->sorted[i];
2397
2398                 if (!F_IS_ACTIVE(file))
2399                         continue;
2400                 if (f_name_cmp(file, flist->sorted[prev_i]) == 0)
2401                         j = prev_i;
2402                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
2403                         int save_mode = file->mode;
2404                         /* Make sure that this directory doesn't duplicate a
2405                          * non-directory earlier in the list. */
2406                         flist->high = prev_i;
2407                         file->mode = S_IFREG;
2408                         j = flist_find(flist, file);
2409                         file->mode = save_mode;
2410                 } else
2411                         j = -1;
2412                 if (j >= 0) {
2413                         int keep, drop;
2414                         /* If one is a dir and the other is not, we want to
2415                          * keep the dir because it might have contents in the
2416                          * list.  Otherwise keep the first one. */
2417                         if (S_ISDIR(file->mode)) {
2418                                 struct file_struct *fp = flist->sorted[j];
2419                                 if (!S_ISDIR(fp->mode))
2420                                         keep = i, drop = j;
2421                                 else {
2422                                         if (am_sender)
2423                                                 file->flags |= FLAG_DUPLICATE;
2424                                         else { /* Make sure we merge our vital flags. */
2425                                                 fp->flags |= file->flags & (FLAG_TOP_DIR|FLAG_CONTENT_DIR);
2426                                                 fp->flags &= file->flags | ~FLAG_IMPLIED_DIR;
2427                                         }
2428                                         keep = j, drop = i;
2429                                 }
2430                         } else
2431                                 keep = j, drop = i;
2432
2433                         if (!am_sender) {
2434                                 if (verbose > 1) {
2435                                         rprintf(FINFO,
2436                                             "removing duplicate name %s from file list (%d)\n",
2437                                             f_name(file, fbuf), drop + flist->ndx_start);
2438                                 }
2439                                 clear_file(flist->sorted[drop]);
2440                         }
2441
2442                         if (keep == i) {
2443                                 if (flist->low == drop) {
2444                                         for (j = drop + 1;
2445                                              j < i && !F_IS_ACTIVE(flist->sorted[j]);
2446                                              j++) {}
2447                                         flist->low = j;
2448                                 }
2449                                 prev_i = i;
2450                         }
2451                 } else
2452                         prev_i = i;
2453         }
2454         flist->high = prev_i;
2455
2456         if (strip_root) {
2457                 /* We need to strip off the leading slashes for relative
2458                  * paths, but this must be done _after_ the sorting phase. */
2459                 for (i = flist->low; i <= flist->high; i++) {
2460                         struct file_struct *file = flist->sorted[i];
2461
2462                         if (!file->dirname)
2463                                 continue;
2464                         while (*file->dirname == '/')
2465                                 file->dirname++;
2466                         if (!*file->dirname)
2467                                 file->dirname = NULL;
2468                 }
2469         }
2470
2471         if (prune_empty_dirs && !am_sender) {
2472                 int j, prev_depth = 0;
2473
2474                 prev_i = 0; /* It's OK that this isn't really true. */
2475
2476                 for (i = flist->low; i <= flist->high; i++) {
2477                         struct file_struct *fp, *file = flist->sorted[i];
2478
2479                         /* This temporarily abuses the F_DEPTH() value for a
2480                          * directory that is in a chain that might get pruned.
2481                          * We restore the old value if it gets a reprieve. */
2482                         if (S_ISDIR(file->mode) && F_DEPTH(file)) {
2483                                 /* Dump empty dirs when coming back down. */
2484                                 for (j = prev_depth; j >= F_DEPTH(file); j--) {
2485                                         fp = flist->sorted[prev_i];
2486                                         if (F_DEPTH(fp) >= 0)
2487                                                 break;
2488                                         prev_i = -F_DEPTH(fp)-1;
2489                                         clear_file(fp);
2490                                 }
2491                                 prev_depth = F_DEPTH(file);
2492                                 if (is_excluded(f_name(file, fbuf), 1,
2493                                                        ALL_FILTERS)) {
2494                                         /* Keep dirs through this dir. */
2495                                         for (j = prev_depth-1; ; j--) {
2496                                                 fp = flist->sorted[prev_i];
2497                                                 if (F_DEPTH(fp) >= 0)
2498                                                         break;
2499                                                 prev_i = -F_DEPTH(fp)-1;
2500                                                 F_DEPTH(fp) = j;
2501                                         }
2502                                 } else
2503                                         F_DEPTH(file) = -prev_i-1;
2504                                 prev_i = i;
2505                         } else {
2506                                 /* Keep dirs through this non-dir. */
2507                                 for (j = prev_depth; ; j--) {
2508                                         fp = flist->sorted[prev_i];
2509                                         if (F_DEPTH(fp) >= 0)
2510                                                 break;
2511                                         prev_i = -F_DEPTH(fp)-1;
2512                                         F_DEPTH(fp) = j;
2513                                 }
2514                         }
2515                 }
2516                 /* Dump all remaining empty dirs. */
2517                 while (1) {
2518                         struct file_struct *fp = flist->sorted[prev_i];
2519                         if (F_DEPTH(fp) >= 0)
2520                                 break;
2521                         prev_i = -F_DEPTH(fp)-1;
2522                         clear_file(fp);
2523                 }
2524
2525                 for (i = flist->low; i <= flist->high; i++) {
2526                         if (F_IS_ACTIVE(flist->sorted[i]))
2527                                 break;
2528                 }
2529                 flist->low = i;
2530                 for (i = flist->high; i >= flist->low; i--) {
2531                         if (F_IS_ACTIVE(flist->sorted[i]))
2532                                 break;
2533                 }
2534                 flist->high = i;
2535         }
2536 }
2537
2538 static void output_flist(struct file_list *flist)
2539 {
2540         char uidbuf[16], gidbuf[16], depthbuf[16];
2541         struct file_struct *file;
2542         const char *root, *dir, *slash, *name, *trail;
2543         const char *who = who_am_i();
2544         int i;
2545
2546         rprintf(FINFO, "[%s] flist start=%d, used=%d, low=%d, high=%d\n",
2547                 who, flist->ndx_start, flist->used, flist->low, flist->high);
2548         for (i = 0; i < flist->used; i++) {
2549                 file = flist->files[i];
2550                 if ((am_root || am_sender) && uid_ndx) {
2551                         snprintf(uidbuf, sizeof uidbuf, " uid=%u",
2552                                  F_OWNER(file));
2553                 } else
2554                         *uidbuf = '\0';
2555                 if (gid_ndx) {
2556                         static char parens[] = "(\0)\0\0\0";
2557                         char *pp = parens + (file->flags & FLAG_SKIP_GROUP ? 0 : 3);
2558                         snprintf(gidbuf, sizeof gidbuf, " gid=%s%u%s",
2559                                  pp, F_GROUP(file), pp + 2);
2560                 } else
2561                         *gidbuf = '\0';
2562                 if (!am_sender)
2563                         snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file));
2564                 if (F_IS_ACTIVE(file)) {
2565                         root = am_sender ? NS(F_PATHNAME(file)) : depthbuf;
2566                         if ((dir = file->dirname) == NULL)
2567                                 dir = slash = "";
2568                         else
2569                                 slash = "/";
2570                         name = file->basename;
2571                         trail = S_ISDIR(file->mode) ? "/" : "";
2572                 } else
2573                         root = dir = slash = name = trail = "";
2574                 rprintf(FINFO,
2575                         "[%s] i=%d %s %s%s%s%s mode=0%o len=%.0f%s%s flags=%x\n",
2576                         who, i + flist->ndx_start,
2577                         root, dir, slash, name, trail,
2578                         (int)file->mode, (double)F_LENGTH(file),
2579                         uidbuf, gidbuf, file->flags);
2580         }
2581 }
2582
2583 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
2584 enum fnc_type { t_PATH, t_ITEM };
2585
2586 static int found_prefix;
2587
2588 /* Compare the names of two file_struct entities, similar to how strcmp()
2589  * would do if it were operating on the joined strings.
2590  *
2591  * Some differences beginning with protocol_version 29: (1) directory names
2592  * are compared with an assumed trailing slash so that they compare in a
2593  * way that would cause them to sort immediately prior to any content they
2594  * may have; (2) a directory of any name compares after a non-directory of
2595  * any name at the same depth; (3) a directory with name "." compares prior
2596  * to anything else.  These changes mean that a directory and a non-dir
2597  * with the same name will not compare as equal (protocol_version >= 29).
2598  *
2599  * The dirname component can be an empty string, but the basename component
2600  * cannot (and never is in the current codebase).  The basename component
2601  * may be NULL (for a removed item), in which case it is considered to be
2602  * after any existing item. */
2603 int f_name_cmp(const struct file_struct *f1, const struct file_struct *f2)
2604 {
2605         int dif;
2606         const uchar *c1, *c2;
2607         enum fnc_state state1, state2;
2608         enum fnc_type type1, type2;
2609         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
2610
2611         if (!f1 || !F_IS_ACTIVE(f1)) {
2612                 if (!f2 || !F_IS_ACTIVE(f2))
2613                         return 0;
2614                 return -1;
2615         }
2616         if (!f2 || !F_IS_ACTIVE(f2))
2617                 return 1;
2618
2619         c1 = (uchar*)f1->dirname;
2620         c2 = (uchar*)f2->dirname;
2621         if (c1 == c2)
2622                 c1 = c2 = NULL;
2623         if (!c1) {
2624                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2625                 c1 = (const uchar*)f1->basename;
2626                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2627                         type1 = t_ITEM;
2628                         state1 = s_TRAILING;
2629                         c1 = (uchar*)"";
2630                 } else
2631                         state1 = s_BASE;
2632         } else {
2633                 type1 = t_path;
2634                 state1 = s_DIR;
2635         }
2636         if (!c2) {
2637                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2638                 c2 = (const uchar*)f2->basename;
2639                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2640                         type2 = t_ITEM;
2641                         state2 = s_TRAILING;
2642                         c2 = (uchar*)"";
2643                 } else
2644                         state2 = s_BASE;
2645         } else {
2646                 type2 = t_path;
2647                 state2 = s_DIR;
2648         }
2649
2650         if (type1 != type2)
2651                 return type1 == t_PATH ? 1 : -1;
2652
2653         do {
2654                 if (!*c1) {
2655                         switch (state1) {
2656                         case s_DIR:
2657                                 state1 = s_SLASH;
2658                                 c1 = (uchar*)"/";
2659                                 break;
2660                         case s_SLASH:
2661                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2662                                 c1 = (const uchar*)f1->basename;
2663                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2664                                         type1 = t_ITEM;
2665                                         state1 = s_TRAILING;
2666                                         c1 = (uchar*)"";
2667                                 } else
2668                                         state1 = s_BASE;
2669                                 break;
2670                         case s_BASE:
2671                                 state1 = s_TRAILING;
2672                                 if (type1 == t_PATH) {
2673                                         c1 = (uchar*)"/";
2674                                         break;
2675                                 }
2676                                 /* FALL THROUGH */
2677                         case s_TRAILING:
2678                                 type1 = t_ITEM;
2679                                 break;
2680                         }
2681                         if (*c2 && type1 != type2)
2682                                 return type1 == t_PATH ? 1 : -1;
2683                 }
2684                 if (!*c2) {
2685                         switch (state2) {
2686                         case s_DIR:
2687                                 state2 = s_SLASH;
2688                                 c2 = (uchar*)"/";
2689                                 break;
2690                         case s_SLASH:
2691                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2692                                 c2 = (const uchar*)f2->basename;
2693                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2694                                         type2 = t_ITEM;
2695                                         state2 = s_TRAILING;
2696                                         c2 = (uchar*)"";
2697                                 } else
2698                                         state2 = s_BASE;
2699                                 break;
2700                         case s_BASE:
2701                                 state2 = s_TRAILING;
2702                                 if (type2 == t_PATH) {
2703                                         c2 = (uchar*)"/";
2704                                         break;
2705                                 }
2706                                 /* FALL THROUGH */
2707                         case s_TRAILING:
2708                                 found_prefix = 1;
2709                                 if (!*c1)
2710                                         return 0;
2711                                 type2 = t_ITEM;
2712                                 break;
2713                         }
2714                         if (type1 != type2)
2715                                 return type1 == t_PATH ? 1 : -1;
2716                 }
2717         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
2718
2719         return dif;
2720 }
2721
2722 /* Returns 1 if f1's filename has all of f2's filename as a prefix.  This does
2723  * not match if f2's basename is not an exact match of a path element in f1.
2724  * E.g. /path/foo is not a prefix of /path/foobar/baz, but /path/foobar is. */
2725 int f_name_has_prefix(const struct file_struct *f1, const struct file_struct *f2)
2726 {
2727         found_prefix = 0;
2728         f_name_cmp(f1, f2);
2729         return found_prefix;
2730 }
2731
2732 char *f_name_buf(void)
2733 {
2734         static char names[5][MAXPATHLEN];
2735         static unsigned int n;
2736
2737         n = (n + 1) % (sizeof names / sizeof names[0]);
2738
2739         return names[n];
2740 }
2741
2742 /* Return a copy of the full filename of a flist entry, using the indicated
2743  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
2744  * done because we checked the size when creating the file_struct entry.
2745  */
2746 char *f_name(const struct file_struct *f, char *fbuf)
2747 {
2748         if (!f || !F_IS_ACTIVE(f))
2749                 return NULL;
2750
2751         if (!fbuf)
2752                 fbuf = f_name_buf();
2753
2754         if (f->dirname) {
2755                 int len = strlen(f->dirname);
2756                 memcpy(fbuf, f->dirname, len);
2757                 fbuf[len] = '/';
2758                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
2759         } else
2760                 strlcpy(fbuf, f->basename, MAXPATHLEN);
2761
2762         return fbuf;
2763 }
2764
2765 /* Do a non-recursive scan of the named directory, possibly ignoring all
2766  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
2767  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
2768  * buffer (the functions we call will append names onto the end, but the old
2769  * dir value will be restored on exit). */
2770 struct file_list *get_dirlist(char *dirname, int dlen, int ignore_filter_rules)
2771 {
2772         struct file_list *dirlist;
2773         char dirbuf[MAXPATHLEN];
2774         int save_recurse = recurse;
2775         int save_xfer_dirs = xfer_dirs;
2776         int save_prune_empty_dirs = prune_empty_dirs;
2777
2778         if (dlen < 0) {
2779                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
2780                 if (dlen >= MAXPATHLEN)
2781                         return NULL;
2782                 dirname = dirbuf;
2783         }
2784
2785         dirlist = flist_new(FLIST_TEMP, "get_dirlist");
2786
2787         recurse = 0;
2788         xfer_dirs = 1;
2789         send_directory(ignore_filter_rules ? -2 : -1, dirlist, dirname, dlen, 0);
2790         xfer_dirs = save_xfer_dirs;
2791         recurse = save_recurse;
2792         if (do_progress)
2793                 flist_count_offset += dirlist->used;
2794
2795         prune_empty_dirs = 0;
2796         dirlist->sorted = dirlist->files;
2797         flist_sort_and_clean(dirlist, 0);
2798         prune_empty_dirs = save_prune_empty_dirs;
2799
2800         if (verbose > 3)
2801                 output_flist(dirlist);
2802
2803         return dirlist;
2804 }