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, 2003, 2004, 2005, 2006 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 2 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, write to the Free Software Foundation, Inc.,
  21  * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
  22  */
  23
  24 #include "rsync.h"
  25 #include "rounding.h"
  26
  27 extern int verbose;
  28 extern int list_only;
  29 extern int am_root;
  30 extern int am_server;
  31 extern int am_daemon;
  32 extern int am_sender;
  33 extern int do_progress;
  34 extern int always_checksum;
  35 extern int module_id;
  36 extern int ignore_errors;
  37 extern int numeric_ids;
  38 extern int recurse;
  39 extern int xfer_dirs;
  40 extern int filesfrom_fd;
  41 extern int one_file_system;
  42 extern int copy_dirlinks;
  43 extern int keep_dirlinks;
  44 extern int preserve_links;
  45 extern int preserve_hard_links;
  46 extern int preserve_devices;
  47 extern int preserve_specials;
  48 extern int preserve_uid;
  49 extern int preserve_gid;
  50 extern int relative_paths;
  51 extern int implied_dirs;
  52 extern int flist_extra_cnt;
  53 extern int ignore_perishable;
  54 extern int non_perishable_cnt;
  55 extern int prune_empty_dirs;
  56 extern int copy_links;
  57 extern int copy_unsafe_links;
  58 extern int protocol_version;
  59 extern int sanitize_paths;
  60 extern struct stats stats;
  61 extern struct file_list *the_file_list;
  62 extern alloc_pool_t hlink_pool;
  63
  64 extern char curr_dir[MAXPATHLEN];
  65
  66 extern struct chmod_mode_struct *chmod_modes;
  67
  68 extern struct filter_list_struct filter_list;
  69 extern struct filter_list_struct server_filter_list;
  70
  71 int io_error;
  72 int checksum_len;
  73 dev_t filesystem_dev; /* used to implement -x */
  74
  75 /* The tmp_* vars are used as a cache area by make_file() to store data
  76  * that the sender doesn't need to remember in its file list.  The data
  77  * will survive just long enough to be used by send_file_entry(). */
  78 static dev_t tmp_rdev;
  79 #ifdef SUPPORT_HARD_LINKS
  80 static struct idev tmp_idev;
  81 #endif
  82 static char tmp_sum[MD4_SUM_LENGTH];
  83
  84 static char empty_sum[MD4_SUM_LENGTH];
  85 static int flist_count_offset; /* for --delete --progress */
  86
  87 static void clean_flist(struct file_list *flist, int strip_root, int no_dups);
  88 static void output_flist(struct file_list *flist);
  89
  90 void init_flist(void)
  91 {
  92         if (verbose > 4) {
  93                 rprintf(FINFO, "FILE_STRUCT_LEN=%d, EXTRA_LEN=%d\n",
  94                         (int)FILE_STRUCT_LEN, (int)EXTRA_LEN);
  95         }
  96         checksum_len = protocol_version < 21 ? 2 : MD4_SUM_LENGTH;
  97 }
  98
  99 static int show_filelist_p(void)
 100 {
 101         return verbose && xfer_dirs && !am_server;
 102 }
 103
 104 static void start_filelist_progress(char *kind)
 105 {
 106         rprintf(FCLIENT, "%s ... ", kind);
 107         if (verbose > 1 || do_progress)
 108                 rprintf(FCLIENT, "\n");
 109         rflush(FINFO);
 110 }
 111
 112 static void emit_filelist_progress(int count)
 113 {
 114         rprintf(FCLIENT, " %d files...\r", count);
 115 }
 116
 117 static void maybe_emit_filelist_progress(int count)
 118 {
 119         if (do_progress && show_filelist_p() && (count % 100) == 0)
 120                 emit_filelist_progress(count);
 121 }
 122
 123 static void finish_filelist_progress(const struct file_list *flist)
 124 {
 125         if (do_progress) {
 126                 /* This overwrites the progress line */
 127                 rprintf(FINFO, "%d file%sto consider\n",
 128                         flist->count, flist->count == 1 ? " " : "s ");
 129         } else
 130                 rprintf(FINFO, "done\n");
 131 }
 132
 133 void show_flist_stats(void)
 134 {
 135         /* Nothing yet */
 136 }
 137
 138 static void list_file_entry(struct file_struct *f)
 139 {
 140         char permbuf[PERMSTRING_SIZE];
 141         double len;
 142
 143         if (!F_IS_ACTIVE(f)) {
 144                 /* this can happen if duplicate names were removed */
 145                 return;
 146         }
 147
 148         permstring(permbuf, f->mode);
 149         len = F_LENGTH(f);
 150
 151 #ifdef SUPPORT_LINKS
 152         if (preserve_links && S_ISLNK(f->mode)) {
 153                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
 154                         permbuf, len, timestring(f->modtime),
 155                         f_name(f, NULL), F_SYMLINK(f));
 156         } else
 157 #endif
 158         {
 159                 rprintf(FINFO, "%s %11.0f %s %s\n",
 160                         permbuf, len, timestring(f->modtime),
 161                         f_name(f, NULL));
 162         }
 163 }
 164
 165 /* Stat either a symlink or its referent, depending on the settings of
 166  * copy_links, copy_unsafe_links, etc.  Returns -1 on error, 0 on success.
 167  *
 168  * If path is the name of a symlink, then the linkbuf buffer (which must hold
 169  * MAXPATHLEN chars) will be set to the symlink's target string.
 170  *
 171  * The stat structure pointed to by stp will contain information about the
 172  * link or the referent as appropriate, if they exist. */
 173 static int readlink_stat(const char *path, STRUCT_STAT *stp, char *linkbuf)
 174 {
 175 #ifdef SUPPORT_LINKS
 176         if (link_stat(path, stp, copy_dirlinks) < 0)
 177                 return -1;
 178         if (S_ISLNK(stp->st_mode)) {
 179                 int llen = readlink(path, linkbuf, MAXPATHLEN - 1);
 180                 if (llen < 0)
 181                         return -1;
 182                 linkbuf[llen] = '\0';
 183                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 184                         if (verbose > 1) {
 185                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 186                                         path, linkbuf);
 187                         }
 188                         return do_stat(path, stp);
 189                 }
 190         }
 191         return 0;
 192 #else
 193         return do_stat(path, stp);
 194 #endif
 195 }
 196
 197 int link_stat(const char *path, STRUCT_STAT *stp, int follow_dirlinks)
 198 {
 199 #ifdef SUPPORT_LINKS
 200         if (copy_links)
 201                 return do_stat(path, stp);
 202         if (do_lstat(path, stp) < 0)
 203                 return -1;
 204         if (follow_dirlinks && S_ISLNK(stp->st_mode)) {
 205                 STRUCT_STAT st;
 206                 if (do_stat(path, &st) == 0 && S_ISDIR(st.st_mode))
 207                         *stp = st;
 208         }
 209         return 0;
 210 #else
 211         return do_stat(path, stp);
 212 #endif
 213 }
 214
 215 /* This function is used to check if a file should be included/excluded
 216  * from the list of files based on its name and type etc.  The value of
 217  * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
 218 static int is_excluded(char *fname, int is_dir, int filter_level)
 219 {
 220 #if 0 /* This currently never happens, so avoid a useless compare. */
 221         if (filter_level == NO_FILTERS)
 222                 return 0;
 223 #endif
 224         if (fname) {
 225                 /* never exclude '.', even if somebody does --exclude '*' */
 226                 if (fname[0] == '.' && !fname[1])
 227                         return 0;
 228                 /* Handle the -R version of the '.' dir. */
 229                 if (fname[0] == '/') {
 230                         int len = strlen(fname);
 231                         if (fname[len-1] == '.' && fname[len-2] == '/')
 232                                 return 0;
 233                 }
 234         }
 235         if (server_filter_list.head
 236             && check_filter(&server_filter_list, fname, is_dir) < 0)
 237                 return 1;
 238         if (filter_level != ALL_FILTERS)
 239                 return 0;
 240         if (filter_list.head
 241             && check_filter(&filter_list, fname, is_dir) < 0)
 242                 return 1;
 243         return 0;
 244 }
 245
 246 static int to_wire_mode(mode_t mode)
 247 {
 248 #ifdef SUPPORT_LINKS
 249 #if _S_IFLNK != 0120000
 250         if (S_ISLNK(mode))
 251                 return (mode & ~(_S_IFMT)) | 0120000;
 252 #endif
 253 #endif
 254         return mode;
 255 }
 256
 257 static mode_t from_wire_mode(int mode)
 258 {
 259 #if _S_IFLNK != 0120000
 260         if ((mode & (_S_IFMT)) == 0120000)
 261                 return (mode & ~(_S_IFMT)) | _S_IFLNK;
 262 #endif
 263         return mode;
 264 }
 265
 266 static void send_directory(int f, struct file_list *flist,
 267                            char *fbuf, int len);
 268
 269 static const char *flist_dir;
 270 static int flist_dir_len;
 271
 272
 273 /**
 274  * Make sure @p flist is big enough to hold at least @p flist->count
 275  * entries.
 276  **/
 277 void flist_expand(struct file_list *flist)
 278 {
 279         struct file_struct **new_ptr;
 280
 281         if (flist->count < flist->malloced)
 282                 return;
 283
 284         if (flist->malloced < FLIST_START)
 285                 flist->malloced = FLIST_START;
 286         else if (flist->malloced >= FLIST_LINEAR)
 287                 flist->malloced += FLIST_LINEAR;
 288         else
 289                 flist->malloced *= 2;
 290
 291         /*
 292          * In case count jumped or we are starting the list
 293          * with a known size just set it.
 294          */
 295         if (flist->malloced < flist->count)
 296                 flist->malloced = flist->count;
 297
 298         new_ptr = realloc_array(flist->files, struct file_struct *,
 299                                 flist->malloced);
 300
 301         if (verbose >= 2 && flist->malloced != FLIST_START) {
 302                 rprintf(FCLIENT, "[%s] expand file_list to %.0f bytes, did%s move\n",
 303                     who_am_i(),
 304                     (double)sizeof flist->files[0] * flist->malloced,
 305                     (new_ptr == flist->files) ? " not" : "");
 306         }
 307
 308         flist->files = new_ptr;
 309
 310         if (!flist->files)
 311                 out_of_memory("flist_expand");
 312 }
 313
 314 static void send_file_entry(struct file_struct *file, int f, int ndx)
 315 {
 316         unsigned short flags;
 317         static time_t modtime;
 318         static mode_t mode;
 319         static int64 dev;
 320         static dev_t rdev;
 321         static uint32 rdev_major;
 322         static uid_t uid;
 323         static gid_t gid;
 324         static char lastname[MAXPATHLEN];
 325         char fname[MAXPATHLEN];
 326         int first_hlink_ndx = -1;
 327         int l1, l2;
 328
 329         f_name(file, fname);
 330
 331         flags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */
 332
 333         if (file->mode == mode)
 334                 flags |= XMIT_SAME_MODE;
 335         else
 336                 mode = file->mode;
 337         if ((preserve_devices && IS_DEVICE(mode))
 338          || (preserve_specials && IS_SPECIAL(mode))) {
 339                 if (protocol_version < 28) {
 340                         if (tmp_rdev == rdev)
 341                                 flags |= XMIT_SAME_RDEV_pre28;
 342                         else
 343                                 rdev = tmp_rdev;
 344                 } else {
 345                         rdev = tmp_rdev;
 346                         if ((uint32)major(rdev) == rdev_major)
 347                                 flags |= XMIT_SAME_RDEV_MAJOR;
 348                         else
 349                                 rdev_major = major(rdev);
 350                         if ((uint32)minor(rdev) <= 0xFFu)
 351                                 flags |= XMIT_RDEV_MINOR_IS_SMALL;
 352                 }
 353         } else if (protocol_version < 28)
 354                 rdev = MAKEDEV(0, 0);
 355         if (preserve_uid) {
 356                 if (F_UID(file) == uid)
 357                         flags |= XMIT_SAME_UID;
 358                 else
 359                         uid = F_UID(file);
 360         }
 361         if (preserve_gid) {
 362                 if (F_GID(file) == gid)
 363                         flags |= XMIT_SAME_GID;
 364                 else
 365                         gid = F_GID(file);
 366         }
 367         if (file->modtime == modtime)
 368                 flags |= XMIT_SAME_TIME;
 369         else
 370                 modtime = file->modtime;
 371
 372 #ifdef SUPPORT_HARD_LINKS
 373         if (tmp_idev.dev != 0) {
 374                 if (protocol_version >= 30) {
 375                         struct idev_node *np = idev_node(tmp_idev.dev, tmp_idev.ino);
 376                         first_hlink_ndx = (int32)np->data - 1;
 377                         if (first_hlink_ndx < 0) {
 378                                 np->data = (void*)(ndx + 1);
 379                                 flags |= XMIT_HLINK_FIRST;
 380                         }
 381                         flags |= XMIT_HLINKED;
 382                 } else {
 383                         if (tmp_idev.dev == dev) {
 384                                 if (protocol_version >= 28)
 385                                         flags |= XMIT_SAME_DEV_pre30;
 386                         } else
 387                                 dev = tmp_idev.dev;
 388                         flags |= XMIT_HLINKED;
 389                 }
 390         }
 391 #endif
 392
 393         for (l1 = 0;
 394             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 395             l1++) {}
 396         l2 = strlen(fname+l1);
 397
 398         if (l1 > 0)
 399                 flags |= XMIT_SAME_NAME;
 400         if (l2 > 255)
 401                 flags |= XMIT_LONG_NAME;
 402
 403         /* We must make sure we don't send a zero flag byte or the
 404          * other end will terminate the flist transfer.  Note that
 405          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 406          * it's harmless way to add a bit to the first flag byte. */
 407         if (protocol_version >= 28) {
 408                 if (!flags && !S_ISDIR(mode))
 409                         flags |= XMIT_TOP_DIR;
 410                 if ((flags & 0xFF00) || !flags) {
 411                         flags |= XMIT_EXTENDED_FLAGS;
 412                         write_shortint(f, flags);
 413                 } else
 414                         write_byte(f, flags);
 415         } else {
 416                 if (!(flags & 0xFF))
 417                         flags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
 418                 write_byte(f, flags);
 419         }
 420         if (flags & XMIT_SAME_NAME)
 421                 write_byte(f, l1);
 422         if (flags & XMIT_LONG_NAME)
 423                 write_int(f, l2);
 424         else
 425                 write_byte(f, l2);
 426         write_buf(f, fname + l1, l2);
 427
 428         if (first_hlink_ndx >= 0) {
 429                 write_int(f, first_hlink_ndx);
 430                 goto the_end;
 431         }
 432
 433         write_longint(f, F_LENGTH(file));
 434         if (!(flags & XMIT_SAME_TIME))
 435                 write_int(f, modtime);
 436         if (!(flags & XMIT_SAME_MODE))
 437                 write_int(f, to_wire_mode(mode));
 438         if (preserve_uid && !(flags & XMIT_SAME_UID)) {
 439                 if (!numeric_ids)
 440                         add_uid(uid);
 441                 write_int(f, uid);
 442         }
 443         if (preserve_gid && !(flags & XMIT_SAME_GID)) {
 444                 if (!numeric_ids)
 445                         add_gid(gid);
 446                 write_int(f, gid);
 447         }
 448         if ((preserve_devices && IS_DEVICE(mode))
 449          || (preserve_specials && IS_SPECIAL(mode))) {
 450                 if (protocol_version < 28) {
 451                         if (!(flags & XMIT_SAME_RDEV_pre28))
 452                                 write_int(f, (int)rdev);
 453                 } else {
 454                         if (!(flags & XMIT_SAME_RDEV_MAJOR))
 455                                 write_int(f, major(rdev));
 456                         if (flags & XMIT_RDEV_MINOR_IS_SMALL)
 457                                 write_byte(f, minor(rdev));
 458                         else
 459                                 write_int(f, minor(rdev));
 460                 }
 461         }
 462
 463 #ifdef SUPPORT_LINKS
 464         if (preserve_links && S_ISLNK(mode)) {
 465                 const char *sl = F_SYMLINK(file);
 466                 int len = strlen(sl);
 467                 write_int(f, len);
 468                 write_buf(f, sl, len);
 469         }
 470 #endif
 471
 472 #ifdef SUPPORT_HARD_LINKS
 473         if (tmp_idev.dev != 0 && protocol_version < 30) {
 474                 if (protocol_version < 26) {
 475                         /* 32-bit dev_t and ino_t */
 476                         write_int(f, (int32)dev);
 477                         write_int(f, (int32)tmp_idev.ino);
 478                 } else {
 479                         /* 64-bit dev_t and ino_t */
 480                         if (!(flags & XMIT_SAME_DEV_pre30))
 481                                 write_longint(f, dev);
 482                         write_longint(f, tmp_idev.ino);
 483                 }
 484         }
 485 #endif
 486
 487         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 488                 const char *sum;
 489                 if (S_ISREG(mode))
 490                         sum = tmp_sum;
 491                 else {
 492                         /* Prior to 28, we sent a useless set of nulls. */
 493                         sum = empty_sum;
 494                 }
 495                 write_buf(f, sum, checksum_len);
 496         }
 497
 498   the_end:
 499         strlcpy(lastname, fname, MAXPATHLEN);
 500 }
 501
 502 static struct file_struct *recv_file_entry(struct file_list *flist,
 503                                            unsigned short flags, int f)
 504 {
 505         static time_t modtime;
 506         static mode_t mode;
 507         static int64 dev;
 508         static dev_t rdev;
 509         static uint32 rdev_major;
 510         static uid_t uid;
 511         static gid_t gid;
 512         static char lastname[MAXPATHLEN], *lastdir;
 513         static int lastdir_depth, lastdir_len = -1;
 514         static unsigned int del_hier_name_len = 0;
 515         static int in_del_hier = 0;
 516         char thisname[MAXPATHLEN];
 517         unsigned int l1 = 0, l2 = 0;
 518         int alloc_len, basename_len, dirname_len, linkname_len;
 519         int extra_len = flist_extra_cnt * EXTRA_LEN;
 520         int first_hlink_ndx = -1;
 521         OFF_T file_length;
 522         char *basename, *dirname, *bp;
 523         struct file_struct *file;
 524
 525         if (!flist) {
 526                 modtime = 0, mode = 0;
 527                 dev = 0, rdev = MAKEDEV(0, 0);
 528                 rdev_major = 0;
 529                 uid = 0, gid = 0;
 530                 *lastname = '\0';
 531                 lastdir_len = -1;
 532                 in_del_hier = 0;
 533                 return NULL;
 534         }
 535
 536         if (flags & XMIT_SAME_NAME)
 537                 l1 = read_byte(f);
 538
 539         if (flags & XMIT_LONG_NAME)
 540                 l2 = read_int(f);
 541         else
 542                 l2 = read_byte(f);
 543
 544         if (l2 >= MAXPATHLEN - l1) {
 545                 rprintf(FERROR,
 546                         "overflow: flags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
 547                         flags, l1, l2, lastname, who_am_i());
 548                 overflow_exit("recv_file_entry");
 549         }
 550
 551         strlcpy(thisname, lastname, l1 + 1);
 552         read_sbuf(f, &thisname[l1], l2);
 553         thisname[l1 + l2] = 0;
 554
 555         strlcpy(lastname, thisname, MAXPATHLEN);
 556
 557         clean_fname(thisname, 0);
 558
 559         if (sanitize_paths)
 560                 sanitize_path(thisname, thisname, "", 0, NULL);
 561
 562         if ((basename = strrchr(thisname, '/')) != NULL) {
 563                 dirname_len = ++basename - thisname; /* counts future '\0' */
 564                 if (lastdir_len == dirname_len - 1
 565                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
 566                         dirname = lastdir;
 567                         dirname_len = 0; /* indicates no copy is needed */
 568                 } else
 569                         dirname = thisname;
 570         } else {
 571                 basename = thisname;
 572                 dirname = NULL;
 573                 dirname_len = 0;
 574         }
 575         basename_len = strlen(basename) + 1; /* count the '\0' */
 576
 577 #ifdef SUPPORT_HARD_LINKS
 578         if (protocol_version >= 30
 579          && BITS_SETnUNSET(flags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
 580                 struct file_struct *first;
 581                 first_hlink_ndx = read_int(f);
 582                 if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->count) {
 583                         rprintf(FERROR,
 584                                 "hard-link reference out of range: %d (%d)\n",
 585                                 first_hlink_ndx, flist->count);
 586                         exit_cleanup(RERR_PROTOCOL);
 587                 }
 588                 first = flist->files[first_hlink_ndx];
 589                 file_length = F_LENGTH(first);
 590                 modtime = first->modtime;
 591                 mode = first->mode;
 592                 if (preserve_uid)
 593                         uid = F_UID(first);
 594                 if (preserve_gid)
 595                         gid = F_GID(first);
 596                 if ((preserve_devices && IS_DEVICE(mode))
 597                  || (preserve_specials && IS_SPECIAL(mode))) {
 598                         uint32 *devp = F_RDEV_P(first);
 599                         rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
 600                 }
 601                 if (preserve_links && S_ISLNK(mode))
 602                         linkname_len = strlen(F_SYMLINK(first)) + 1;
 603                 else
 604                         linkname_len = 0;
 605                 goto create_object;
 606         }
 607 #endif
 608
 609         file_length = read_longint(f);
 610         if (!(flags & XMIT_SAME_TIME))
 611                 modtime = (time_t)read_int(f);
 612         if (!(flags & XMIT_SAME_MODE))
 613                 mode = from_wire_mode(read_int(f));
 614
 615         if (chmod_modes && !S_ISLNK(mode))
 616                 mode = tweak_mode(mode, chmod_modes);
 617
 618         if (preserve_uid && !(flags & XMIT_SAME_UID))
 619                 uid = (uid_t)read_int(f);
 620         if (preserve_gid && !(flags & XMIT_SAME_GID))
 621                 gid = (gid_t)read_int(f);
 622
 623         if ((preserve_devices && IS_DEVICE(mode))
 624          || (preserve_specials && IS_SPECIAL(mode))) {
 625                 if (protocol_version < 28) {
 626                         if (!(flags & XMIT_SAME_RDEV_pre28))
 627                                 rdev = (dev_t)read_int(f);
 628                 } else {
 629                         uint32 rdev_minor;
 630                         if (!(flags & XMIT_SAME_RDEV_MAJOR))
 631                                 rdev_major = read_int(f);
 632                         if (flags & XMIT_RDEV_MINOR_IS_SMALL)
 633                                 rdev_minor = read_byte(f);
 634                         else
 635                                 rdev_minor = read_int(f);
 636                         rdev = MAKEDEV(rdev_major, rdev_minor);
 637                 }
 638                 extra_len += 2 * EXTRA_LEN;
 639                 file_length = 0;
 640         } else if (protocol_version < 28)
 641                 rdev = MAKEDEV(0, 0);
 642
 643 #ifdef SUPPORT_LINKS
 644         if (preserve_links && S_ISLNK(mode)) {
 645                 linkname_len = read_int(f) + 1; /* count the '\0' */
 646                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 647                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 648                                 linkname_len - 1);
 649                         overflow_exit("recv_file_entry");
 650                 }
 651         }
 652         else
 653 #endif
 654                 linkname_len = 0;
 655
 656 #ifdef SUPPORT_HARD_LINKS
 657   create_object:
 658         if (preserve_hard_links) {
 659                 if (protocol_version < 28 && S_ISREG(mode))
 660                         flags |= XMIT_HLINKED;
 661                 if (flags & XMIT_HLINKED)
 662                         extra_len += EXTRA_LEN;
 663         }
 664 #endif
 665
 666         if (always_checksum && S_ISREG(mode))
 667                 extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
 668
 669         if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
 670                 extra_len += EXTRA_LEN;
 671
 672 #if EXTRA_ROUNDING > 0
 673         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
 674                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
 675 #endif
 676
 677         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len + dirname_len
 678                   + linkname_len;
 679         bp = pool_alloc(flist->file_pool, alloc_len, "recv_file_entry");
 680
 681         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
 682         bp += extra_len;
 683         file = (struct file_struct *)bp;
 684         bp += FILE_STRUCT_LEN;
 685
 686         memcpy(bp, basename, basename_len);
 687         bp += basename_len + linkname_len; /* skip space for symlink too */
 688
 689 #ifdef SUPPORT_HARD_LINKS
 690         if (flags & XMIT_HLINKED)
 691                 file->flags |= FLAG_HLINKED;
 692 #endif
 693         file->modtime = modtime;
 694         file->len32 = (uint32)file_length;
 695         if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
 696                 file->flags |= FLAG_LENGTH64;
 697                 OPT_EXTRA(file, 0)->unum = (uint32)(file_length >> 32);
 698         }
 699         file->mode = mode;
 700         if (preserve_uid)
 701                 F_UID(file) = uid;
 702         if (preserve_gid)
 703                 F_GID(file) = gid;
 704
 705         if (dirname_len) {
 706                 file->dirname = lastdir = bp;
 707                 lastdir_len = dirname_len - 1;
 708                 memcpy(bp, dirname, dirname_len - 1);
 709                 bp += dirname_len;
 710                 bp[-1] = '\0';
 711                 lastdir_depth = count_dir_elements(lastdir);
 712                 file->dir.depth = lastdir_depth + 1;
 713         } else if (dirname) {
 714                 file->dirname = dirname; /* we're reusing lastname */
 715                 file->dir.depth = lastdir_depth + 1;
 716         } else
 717                 file->dir.depth = 1;
 718
 719         if (S_ISDIR(mode)) {
 720                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
 721                         file->dir.depth--;
 722                 if (flags & XMIT_TOP_DIR) {
 723                         in_del_hier = recurse;
 724                         del_hier_name_len = file->dir.depth == 0 ? 0 : l1 + l2;
 725                         if (relative_paths && del_hier_name_len > 2
 726                             && lastname[del_hier_name_len-1] == '.'
 727                             && lastname[del_hier_name_len-2] == '/')
 728                                 del_hier_name_len -= 2;
 729                         file->flags |= FLAG_TOP_DIR | FLAG_XFER_DIR;
 730                 } else if (in_del_hier) {
 731                         if (!relative_paths || !del_hier_name_len
 732                          || (l1 >= del_hier_name_len
 733                           && lastname[del_hier_name_len] == '/'))
 734                                 file->flags |= FLAG_XFER_DIR;
 735                         else
 736                                 in_del_hier = 0;
 737                 }
 738         }
 739
 740         if ((preserve_devices && IS_DEVICE(mode))
 741          || (preserve_specials && IS_SPECIAL(mode))) {
 742                 uint32 *devp = F_RDEV_P(file);
 743                 DEV_MAJOR(devp) = major(rdev);
 744                 DEV_MINOR(devp) = minor(rdev);
 745         }
 746
 747 #ifdef SUPPORT_LINKS
 748         if (linkname_len) {
 749                 bp = (char*)file->basename + basename_len;
 750                 if (first_hlink_ndx >= 0) {
 751                         struct file_struct *first = flist->files[first_hlink_ndx];
 752                         memcpy(bp, F_SYMLINK(first), linkname_len);
 753                 } else
 754                         read_sbuf(f, bp, linkname_len - 1);
 755                 if (sanitize_paths)
 756                         sanitize_path(bp, bp, "", lastdir_depth, NULL);
 757         }
 758 #endif
 759
 760 #ifdef SUPPORT_HARD_LINKS
 761         if (preserve_hard_links && flags & XMIT_HLINKED) {
 762                 if (protocol_version >= 30) {
 763                         F_HL_GNUM(file) = flags & XMIT_HLINK_FIRST
 764                                         ? flist->count : first_hlink_ndx;
 765                 } else {
 766                         struct idev *idevp = pool_talloc(hlink_pool, struct idev,
 767                                                          1, "inode_table");
 768                         F_HL_IDEV(file) = idevp;
 769                         if (protocol_version < 26) {
 770                                 idevp->dev = read_int(f);
 771                                 idevp->ino = read_int(f);
 772                         } else {
 773                                 if (!(flags & XMIT_SAME_DEV_pre30))
 774                                         dev = read_longint(f);
 775                                 idevp->dev = dev;
 776                                 idevp->ino = read_longint(f);
 777                         }
 778                 }
 779         }
 780 #endif
 781
 782         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 783                 if (S_ISREG(mode))
 784                         bp = (char*)F_SUM(file);
 785                 else {
 786                         /* Prior to 28, we get a useless set of nulls. */
 787                         bp = tmp_sum;
 788                 }
 789                 if (first_hlink_ndx >= 0) {
 790                         struct file_struct *first = flist->files[first_hlink_ndx];
 791                         memcpy(bp, F_SUM(first), checksum_len);
 792                 } else
 793                         read_buf(f, bp, checksum_len);
 794         }
 795
 796         return file;
 797 }
 798
 799 /**
 800  * Create a file_struct for a named file by reading its stat()
 801  * information and performing extensive checks against global
 802  * options.
 803  *
 804  * @return the new file, or NULL if there was an error or this file
 805  * should be excluded.
 806  *
 807  * @todo There is a small optimization opportunity here to avoid
 808  * stat()ing the file in some circumstances, which has a certain cost.
 809  * We are called immediately after doing readdir(), and so we may
 810  * already know the d_type of the file.  We could for example avoid
 811  * statting directories if we're not recursing, but this is not a very
 812  * important case.  Some systems may not have d_type.
 813  **/
 814 struct file_struct *make_file(const char *fname, struct file_list *flist,
 815                               STRUCT_STAT *stp, int flags, int filter_level)
 816 {
 817         static char *lastdir;
 818         static int lastdir_len = -1;
 819         struct file_struct *file;
 820         STRUCT_STAT st;
 821         char thisname[MAXPATHLEN];
 822         char linkname[MAXPATHLEN];
 823         int alloc_len, basename_len, dirname_len, linkname_len;
 824         int extra_len = flist_extra_cnt * EXTRA_LEN;
 825         char *basename, *dirname, *bp;
 826
 827         if (!flist || !flist->count)    /* Ignore lastdir when invalid. */
 828                 lastdir_len = -1;
 829
 830         if (strlcpy(thisname, fname, sizeof thisname)
 831             >= sizeof thisname - flist_dir_len) {
 832                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
 833                 return NULL;
 834         }
 835         clean_fname(thisname, 0);
 836         if (sanitize_paths)
 837                 sanitize_path(thisname, thisname, "", 0, NULL);
 838
 839         if (stp && S_ISDIR(stp->st_mode)) {
 840                 st = *stp; /* Needed for "symlink/." with --relative. */
 841                 *linkname = '\0'; /* make IBM code checker happy */
 842         } else if (readlink_stat(thisname, &st, linkname) != 0) {
 843                 int save_errno = errno;
 844                 /* See if file is excluded before reporting an error. */
 845                 if (filter_level != NO_FILTERS
 846                  && (is_excluded(thisname, 0, filter_level)
 847                   || is_excluded(thisname, 1, filter_level))) {
 848                         if (ignore_perishable && save_errno != ENOENT)
 849                                 non_perishable_cnt++;
 850                         return NULL;
 851                 }
 852                 if (save_errno == ENOENT) {
 853 #ifdef SUPPORT_LINKS
 854                         /* Avoid "vanished" error if symlink points nowhere. */
 855                         if (copy_links && do_lstat(thisname, &st) == 0
 856                             && S_ISLNK(st.st_mode)) {
 857                                 io_error |= IOERR_GENERAL;
 858                                 rprintf(FERROR, "symlink has no referent: %s\n",
 859                                         full_fname(thisname));
 860                         } else
 861 #endif
 862                         {
 863                                 enum logcode c = am_daemon && protocol_version < 28
 864                                     ? FERROR : FINFO;
 865                                 io_error |= IOERR_VANISHED;
 866                                 rprintf(c, "file has vanished: %s\n",
 867                                         full_fname(thisname));
 868                         }
 869                 } else {
 870                         io_error |= IOERR_GENERAL;
 871                         rsyserr(FERROR, save_errno, "readlink %s failed",
 872                                 full_fname(thisname));
 873                 }
 874                 return NULL;
 875         }
 876
 877         /* backup.c calls us with filter_level set to NO_FILTERS. */
 878         if (filter_level == NO_FILTERS)
 879                 goto skip_filters;
 880
 881         if (S_ISDIR(st.st_mode) && !xfer_dirs) {
 882                 rprintf(FINFO, "skipping directory %s\n", thisname);
 883                 return NULL;
 884         }
 885
 886         /* -x only affects directories because we need to avoid recursing
 887          * into a mount-point directory, not to avoid copying a symlinked
 888          * file if -L (or similar) was specified. */
 889         if (one_file_system && st.st_dev != filesystem_dev
 890          && S_ISDIR(st.st_mode)) {
 891                 if (one_file_system > 1) {
 892                         if (verbose > 2) {
 893                                 rprintf(FINFO, "skipping mount-point dir %s\n",
 894                                         thisname);
 895                         }
 896                         return NULL;
 897                 }
 898                 flags |= FLAG_MOUNT_DIR;
 899         }
 900
 901         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level)) {
 902                 if (ignore_perishable)
 903                         non_perishable_cnt++;
 904                 return NULL;
 905         }
 906
 907         if (lp_ignore_nonreadable(module_id)) {
 908 #ifdef SUPPORT_LINKS
 909                 if (!S_ISLNK(st.st_mode))
 910 #endif
 911                         if (access(thisname, R_OK) != 0)
 912                                 return NULL;
 913         }
 914
 915   skip_filters:
 916
 917         if (verbose > 2) {
 918                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
 919                         who_am_i(), thisname, filter_level);
 920         }
 921
 922         if ((basename = strrchr(thisname, '/')) != NULL) {
 923                 dirname_len = ++basename - thisname; /* counts future '\0' */
 924                 if (lastdir_len == dirname_len - 1
 925                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
 926                         dirname = lastdir;
 927                         dirname_len = 0; /* indicates no copy is needed */
 928                 } else
 929                         dirname = thisname;
 930         } else {
 931                 basename = thisname;
 932                 dirname = NULL;
 933                 dirname_len = 0;
 934         }
 935         basename_len = strlen(basename) + 1; /* count the '\0' */
 936
 937 #ifdef SUPPORT_LINKS
 938         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
 939 #else
 940         linkname_len = 0;
 941 #endif
 942
 943         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
 944                 extra_len += EXTRA_LEN;
 945
 946 #if EXTRA_ROUNDING > 0
 947         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
 948                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
 949 #endif
 950
 951         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len + dirname_len
 952                   + linkname_len;
 953         if (flist)
 954                 bp = pool_alloc(flist->file_pool, alloc_len, "make_file");
 955         else {
 956                 if (!(bp = new_array(char, alloc_len)))
 957                         out_of_memory("make_file");
 958         }
 959
 960         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
 961         bp += extra_len;
 962         file = (struct file_struct *)bp;
 963         bp += FILE_STRUCT_LEN;
 964
 965         memcpy(bp, basename, basename_len);
 966         bp += basename_len + linkname_len; /* skip space for symlink too */
 967
 968 #ifdef SUPPORT_HARD_LINKS
 969         if (preserve_hard_links && flist) {
 970                 if (protocol_version >= 28
 971                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
 972                  : S_ISREG(st.st_mode)) {
 973                         tmp_idev.dev = st.st_dev;
 974                         tmp_idev.ino = st.st_ino;
 975                 } else
 976                         tmp_idev.dev = tmp_idev.ino = 0;
 977         }
 978 #endif
 979
 980 #ifdef HAVE_STRUCT_STAT_ST_RDEV
 981         if (IS_DEVICE(st.st_mode) || IS_SPECIAL(st.st_mode)) {
 982                 tmp_rdev = st.st_rdev;
 983                 st.st_size = 0;
 984         }
 985 #endif
 986
 987         file->flags = flags;
 988         file->modtime = st.st_mtime;
 989         file->len32 = (uint32)st.st_size;
 990         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
 991                 file->flags |= FLAG_LENGTH64;
 992                 OPT_EXTRA(file, 0)->unum = (uint32)(st.st_size >> 32);
 993         }
 994         file->mode = st.st_mode;
 995         if (preserve_uid)
 996                 F_UID(file) = st.st_uid;
 997         if (preserve_gid)
 998                 F_GID(file) = st.st_gid;
 999
1000         if (dirname_len) {
1001                 file->dirname = lastdir = bp;
1002                 lastdir_len = dirname_len - 1;
1003                 memcpy(bp, dirname, dirname_len - 1);
1004                 bp += dirname_len;
1005                 bp[-1] = '\0';
1006         } else if (dirname)
1007                 file->dirname = dirname;
1008
1009 #ifdef SUPPORT_LINKS
1010         if (linkname_len) {
1011                 bp = (char*)file->basename + basename_len;
1012                 memcpy(bp, linkname, linkname_len);
1013         }
1014 #endif
1015
1016         if (always_checksum && am_sender && S_ISREG(st.st_mode))
1017                 file_checksum(thisname, tmp_sum, st.st_size);
1018
1019         file->dir.root = flist_dir;
1020
1021         /* This code is only used by the receiver when it is building
1022          * a list of files for a delete pass. */
1023         if (keep_dirlinks && linkname_len && flist) {
1024                 STRUCT_STAT st2;
1025                 int save_mode = file->mode;
1026                 file->mode = S_IFDIR; /* Find a directory with our name. */
1027                 if (flist_find(the_file_list, file) >= 0
1028                     && do_stat(thisname, &st2) == 0 && S_ISDIR(st2.st_mode)) {
1029                         file->modtime = st2.st_mtime;
1030                         file->len32 = 0;
1031                         file->mode = st2.st_mode;
1032                         if (preserve_uid)
1033                                 F_UID(file) = st2.st_uid;
1034                         if (preserve_gid)
1035                                 F_GID(file) = st2.st_gid;
1036                 } else
1037                         file->mode = save_mode;
1038         }
1039
1040         if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode))
1041                 stats.total_size += st.st_size;
1042
1043         if (basename_len == 0+1)
1044                 return NULL;
1045
1046         return file;
1047 }
1048
1049 /* Only called for temporary file_struct entries created by make_file(). */
1050 void unmake_file(struct file_struct *file)
1051 {
1052         int extra_cnt = flist_extra_cnt + LEN64_BUMP(file);
1053 #if EXTRA_ROUNDING > 0
1054         if (extra_cnt & EXTRA_ROUNDING)
1055                 extra_cnt = (extra_cnt | EXTRA_ROUNDING) + 1;
1056 #endif
1057         free(REQ_EXTRA(file, extra_cnt));
1058 }
1059
1060 static struct file_struct *send_file_name(int f, struct file_list *flist,
1061                                           char *fname, STRUCT_STAT *stp,
1062                                           unsigned short flags)
1063 {
1064         struct file_struct *file;
1065
1066         file = make_file(fname, flist, stp, flags,
1067                          f == -2 ? SERVER_FILTERS : ALL_FILTERS);
1068         if (!file)
1069                 return NULL;
1070
1071         if (chmod_modes && !S_ISLNK(file->mode))
1072                 file->mode = tweak_mode(file->mode, chmod_modes);
1073
1074         maybe_emit_filelist_progress(flist->count + flist_count_offset);
1075
1076         flist_expand(flist);
1077         flist->files[flist->count++] = file;
1078         if (f >= 0)
1079                 send_file_entry(file, f, flist->count - 1);
1080         return file;
1081 }
1082
1083 static void send_if_directory(int f, struct file_list *flist,
1084                               struct file_struct *file,
1085                               char *fbuf, unsigned int ol)
1086 {
1087         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1088
1089         if (S_ISDIR(file->mode)
1090             && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) {
1091                 void *save_filters;
1092                 unsigned int len = strlen(fbuf);
1093                 if (len > 1 && fbuf[len-1] == '/')
1094                         fbuf[--len] = '\0';
1095                 if (len >= MAXPATHLEN - 1) {
1096                         io_error |= IOERR_GENERAL;
1097                         rprintf(FERROR, "skipping long-named directory: %s\n",
1098                                 full_fname(fbuf));
1099                         return;
1100                 }
1101                 save_filters = push_local_filters(fbuf, len);
1102                 send_directory(f, flist, fbuf, len);
1103                 pop_local_filters(save_filters);
1104                 fbuf[ol] = '\0';
1105                 if (is_dot_dir)
1106                         fbuf[ol-1] = '.';
1107         }
1108 }
1109
1110 /* This function is normally called by the sender, but the receiving side also
1111  * calls it from get_dirlist() with f set to -1 so that we just construct the
1112  * file list in memory without sending it over the wire.  Also, get_dirlist()
1113  * might call this with f set to -2, which also indicates that local filter
1114  * rules should be ignored. */
1115 static void send_directory(int f, struct file_list *flist, char *fbuf, int len)
1116 {
1117         struct dirent *di;
1118         unsigned remainder;
1119         char *p;
1120         DIR *d;
1121         int start = flist->count;
1122
1123         if (!(d = opendir(fbuf))) {
1124                 io_error |= IOERR_GENERAL;
1125                 rsyserr(FERROR, errno, "opendir %s failed", full_fname(fbuf));
1126                 return;
1127         }
1128
1129         p = fbuf + len;
1130         if (len != 1 || *fbuf != '/')
1131                 *p++ = '/';
1132         *p = '\0';
1133         remainder = MAXPATHLEN - (p - fbuf);
1134
1135         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1136                 char *dname = d_name(di);
1137                 if (dname[0] == '.' && (dname[1] == '\0'
1138                     || (dname[1] == '.' && dname[2] == '\0')))
1139                         continue;
1140                 if (strlcpy(p, dname, remainder) >= remainder) {
1141                         io_error |= IOERR_GENERAL;
1142                         rprintf(FINFO,
1143                                 "cannot send long-named file %s\n",
1144                                 full_fname(fbuf));
1145                         continue;
1146                 }
1147
1148                 send_file_name(f, flist, fbuf, NULL, 0);
1149         }
1150
1151         fbuf[len] = '\0';
1152
1153         if (errno) {
1154                 io_error |= IOERR_GENERAL;
1155                 rsyserr(FERROR, errno, "readdir(%s)", full_fname(fbuf));
1156         }
1157
1158         closedir(d);
1159
1160         if (recurse) {
1161                 int i, end = flist->count - 1;
1162                 /* send_if_directory() bumps flist->count, so use "end". */
1163                 for (i = start; i <= end; i++)
1164                         send_if_directory(f, flist, flist->files[i], fbuf, len);
1165         }
1166 }
1167
1168 struct file_list *send_file_list(int f, int argc, char *argv[])
1169 {
1170         int len;
1171         STRUCT_STAT st;
1172         char *p, *dir, olddir[sizeof curr_dir];
1173         char lastpath[MAXPATHLEN] = "";
1174         struct file_list *flist;
1175         struct timeval start_tv, end_tv;
1176         int64 start_write;
1177         int use_ff_fd = 0;
1178
1179         rprintf(FLOG, "building file list\n");
1180         if (show_filelist_p())
1181                 start_filelist_progress("building file list");
1182
1183         start_write = stats.total_written;
1184         gettimeofday(&start_tv, NULL);
1185
1186 #ifdef SUPPORT_HARD_LINKS
1187         if (preserve_hard_links && protocol_version >= 30)
1188                 init_hard_links();
1189 #endif
1190
1191         flist = flist_new("send_file_list");
1192
1193         io_start_buffering_out();
1194         if (filesfrom_fd >= 0) {
1195                 if (argv[0] && !push_dir(argv[0], 0)) {
1196                         rsyserr(FERROR, errno, "push_dir %s failed",
1197                                 full_fname(argv[0]));
1198                         exit_cleanup(RERR_FILESELECT);
1199                 }
1200                 use_ff_fd = 1;
1201         }
1202
1203         while (1) {
1204                 char fbuf[MAXPATHLEN];
1205                 char *fn;
1206                 int is_dot_dir;
1207
1208                 if (use_ff_fd) {
1209                         if (read_filesfrom_line(filesfrom_fd, fbuf) == 0)
1210                                 break;
1211                         sanitize_path(fbuf, fbuf, "", 0, NULL);
1212                 } else {
1213                         if (argc-- == 0)
1214                                 break;
1215                         strlcpy(fbuf, *argv++, MAXPATHLEN);
1216                         if (sanitize_paths)
1217                                 sanitize_path(fbuf, fbuf, "", 0, NULL);
1218                 }
1219
1220                 len = strlen(fbuf);
1221                 if (relative_paths) {
1222                         /* We clean up fbuf below. */
1223                         is_dot_dir = 0;
1224                 } else if (!len || fbuf[len - 1] == '/') {
1225                         if (len == 2 && fbuf[0] == '.') {
1226                                 /* Turn "./" into just "." rather than "./." */
1227                                 fbuf[1] = '\0';
1228                         } else {
1229                                 if (len + 1 >= MAXPATHLEN)
1230                                         overflow_exit("send_file_list");
1231                                 fbuf[len++] = '.';
1232                                 fbuf[len] = '\0';
1233                         }
1234                         is_dot_dir = 1;
1235                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
1236                     && (len == 2 || fbuf[len-3] == '/')) {
1237                         if (len + 2 >= MAXPATHLEN)
1238                                 overflow_exit("send_file_list");
1239                         fbuf[len++] = '/';
1240                         fbuf[len++] = '.';
1241                         fbuf[len] = '\0';
1242                         is_dot_dir = 1;
1243                 } else {
1244                         is_dot_dir = fbuf[len-1] == '.'
1245                                    && (len == 1 || fbuf[len-2] == '/');
1246                 }
1247
1248                 if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1249                         io_error |= IOERR_GENERAL;
1250                         rsyserr(FERROR, errno, "link_stat %s failed",
1251                                 full_fname(fbuf));
1252                         continue;
1253                 }
1254
1255                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
1256                         rprintf(FINFO, "skipping directory %s\n", fbuf);
1257                         continue;
1258                 }
1259
1260                 dir = NULL;
1261                 olddir[0] = '\0';
1262
1263                 if (!relative_paths) {
1264                         p = strrchr(fbuf, '/');
1265                         if (p) {
1266                                 *p = '\0';
1267                                 if (p == fbuf)
1268                                         dir = "/";
1269                                 else
1270                                         dir = fbuf;
1271                                 len -= p - fbuf + 1;
1272                                 fn = p + 1;
1273                         } else
1274                                 fn = fbuf;
1275                 } else {
1276                         if ((p = strstr(fbuf, "/./")) != NULL) {
1277                                 *p = '\0';
1278                                 if (p == fbuf)
1279                                         dir = "/";
1280                                 else
1281                                         dir = fbuf;
1282                                 len -= p - fbuf + 3;
1283                                 fn = p + 3;
1284                         } else
1285                                 fn = fbuf;
1286                         /* Get rid of trailing "/" and "/.". */
1287                         while (len) {
1288                                 if (fn[len - 1] == '/') {
1289                                         is_dot_dir = 1;
1290                                         if (!--len && !dir) {
1291                                                 len++;
1292                                                 break;
1293                                         }
1294                                 }
1295                                 else if (len >= 2 && fn[len - 1] == '.'
1296                                                   && fn[len - 2] == '/') {
1297                                         is_dot_dir = 1;
1298                                         if (!(len -= 2) && !dir) {
1299                                                 len++;
1300                                                 break;
1301                                         }
1302                                 } else
1303                                         break;
1304                         }
1305                         if (len == 1 && fn[0] == '/')
1306                                 fn[len++] = '.';
1307                         fn[len] = '\0';
1308                         /* Reject a ".." dir in the active part of the path. */
1309                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
1310                                 if ((p[2] == '/' || p[2] == '\0')
1311                                  && (p == fn || p[-1] == '/')) {
1312                                         rprintf(FERROR,
1313                                             "found \"..\" dir in relative path: %s\n",
1314                                             fbuf);
1315                                         exit_cleanup(RERR_SYNTAX);
1316                                 }
1317                         }
1318                 }
1319
1320                 if (!*fn) {
1321                         len = 1;
1322                         fn = ".";
1323                 }
1324
1325                 if (dir && *dir) {
1326                         static const char *lastdir;
1327                         static int lastdir_len;
1328
1329                         strlcpy(olddir, curr_dir, sizeof olddir);
1330
1331                         if (!push_dir(dir, 0)) {
1332                                 io_error |= IOERR_GENERAL;
1333                                 rsyserr(FERROR, errno, "push_dir %s failed",
1334                                         full_fname(dir));
1335                                 continue;
1336                         }
1337
1338                         if (lastdir && strcmp(lastdir, dir) == 0) {
1339                                 flist_dir = lastdir;
1340                                 flist_dir_len = lastdir_len;
1341                         } else {
1342                                 flist_dir = lastdir = strdup(dir);
1343                                 flist_dir_len = lastdir_len = strlen(dir);
1344                         }
1345                 }
1346
1347                 if (fn != fbuf)
1348                         memmove(fbuf, fn, len + 1);
1349
1350                 if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
1351                         /* Send the implied directories at the start of the
1352                          * source spec, so we get their permissions right. */
1353                         char *lp = lastpath, *slash = fbuf;
1354                         *p = '\0';
1355                         /* Skip any initial directories in our path that we
1356                          * have in common with lastpath. */
1357                         for (fn = fbuf; *fn && *lp == *fn; lp++, fn++) {
1358                                 if (*fn == '/')
1359                                         slash = fn;
1360                         }
1361                         *p = '/';
1362                         if (fn != p || (*lp && *lp != '/')) {
1363                                 int save_copy_links = copy_links;
1364                                 int save_xfer_dirs = xfer_dirs;
1365                                 copy_links |= copy_unsafe_links;
1366                                 xfer_dirs = 1;
1367                                 while ((slash = strchr(slash+1, '/')) != 0) {
1368                                         *slash = '\0';
1369                                         send_file_name(f, flist, fbuf, NULL, 0);
1370                                         *slash = '/';
1371                                 }
1372                                 copy_links = save_copy_links;
1373                                 xfer_dirs = save_xfer_dirs;
1374                                 *p = '\0';
1375                                 strlcpy(lastpath, fbuf, sizeof lastpath);
1376                                 *p = '/';
1377                         }
1378                 }
1379
1380                 if (one_file_system)
1381                         filesystem_dev = st.st_dev;
1382
1383                 if (recurse || (xfer_dirs && is_dot_dir)) {
1384                         struct file_struct *file;
1385                         file = send_file_name(f, flist, fbuf, &st, FLAG_TOP_DIR);
1386                         if (file)
1387                                 send_if_directory(f, flist, file, fbuf, len);
1388                 } else
1389                         send_file_name(f, flist, fbuf, &st, 0);
1390
1391                 if (olddir[0]) {
1392                         flist_dir = NULL;
1393                         flist_dir_len = 0;
1394                         if (!pop_dir(olddir)) {
1395                                 rsyserr(FERROR, errno, "pop_dir %s failed",
1396                                         full_fname(olddir));
1397                                 exit_cleanup(RERR_FILESELECT);
1398                         }
1399                 }
1400         }
1401
1402         gettimeofday(&end_tv, NULL);
1403         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
1404                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
1405         if (stats.flist_buildtime == 0)
1406                 stats.flist_buildtime = 1;
1407         start_tv = end_tv;
1408
1409         write_byte(f, 0); /* Indicate end of file list */
1410
1411 #ifdef SUPPORT_HARD_LINKS
1412         if (preserve_hard_links && protocol_version >= 30)
1413                 idev_destroy();
1414 #endif
1415
1416         if (show_filelist_p())
1417                 finish_filelist_progress(flist);
1418
1419         gettimeofday(&end_tv, NULL);
1420         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
1421                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
1422
1423         /* Sort the list without removing any duplicates.  This allows the
1424          * receiving side to ask for any name they like, which gives us the
1425          * flexibility to change the way we unduplicate names in the future
1426          * without causing a compatibility problem with older versions. */
1427         clean_flist(flist, 0, 0);
1428
1429         if (!numeric_ids)
1430                 send_uid_list(f);
1431
1432         /* send the io_error flag */
1433         write_int(f, lp_ignore_errors(module_id) ? 0 : io_error);
1434
1435         io_end_buffering();
1436         stats.flist_size = stats.total_written - start_write;
1437         stats.num_files = flist->count;
1438
1439         if (verbose > 3)
1440                 output_flist(flist);
1441
1442         if (verbose > 2)
1443                 rprintf(FINFO, "send_file_list done\n");
1444
1445         return flist;
1446 }
1447
1448 struct file_list *recv_file_list(int f)
1449 {
1450         struct file_list *flist;
1451         unsigned short flags;
1452         int64 start_read;
1453
1454         rprintf(FLOG, "receiving file list\n");
1455         if (show_filelist_p())
1456                 start_filelist_progress("receiving file list");
1457
1458         start_read = stats.total_read;
1459
1460         flist = flist_new("recv_file_list");
1461
1462 #ifdef SUPPORT_HARD_LINKS
1463         if (preserve_hard_links && protocol_version < 30)
1464                 init_hard_links();
1465 #endif
1466
1467         while ((flags = read_byte(f)) != 0) {
1468                 struct file_struct *file;
1469
1470                 flist_expand(flist);
1471
1472                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
1473                         flags |= read_byte(f) << 8;
1474                 file = recv_file_entry(flist, flags, f);
1475
1476                 if (S_ISREG(file->mode) || S_ISLNK(file->mode))
1477                         stats.total_size += F_LENGTH(file);
1478
1479                 flist->files[flist->count++] = file;
1480
1481                 maybe_emit_filelist_progress(flist->count);
1482
1483                 if (verbose > 2) {
1484                         rprintf(FINFO, "recv_file_name(%s)\n",
1485                                 f_name(file, NULL));
1486                 }
1487         }
1488         recv_file_entry(NULL, 0, 0); /* Signal that we're done. */
1489
1490         if (verbose > 2)
1491                 rprintf(FINFO, "received %d names\n", flist->count);
1492
1493         if (show_filelist_p())
1494                 finish_filelist_progress(flist);
1495
1496         clean_flist(flist, relative_paths, 1);
1497
1498         if (f >= 0) {
1499                 recv_uid_list(f, flist);
1500
1501                 /* Recv the io_error flag */
1502                 if (lp_ignore_errors(module_id) || ignore_errors)
1503                         read_int(f);
1504                 else
1505                         io_error |= read_int(f);
1506         }
1507
1508         if (verbose > 3)
1509                 output_flist(flist);
1510
1511         if (list_only) {
1512                 int i;
1513                 for (i = 0; i < flist->count; i++)
1514                         list_file_entry(flist->files[i]);
1515         }
1516
1517         if (verbose > 2)
1518                 rprintf(FINFO, "recv_file_list done\n");
1519
1520         stats.flist_size = stats.total_read - start_read;
1521         stats.num_files = flist->count;
1522
1523         return flist;
1524 }
1525
1526 static int file_compare(struct file_struct **file1, struct file_struct **file2)
1527 {
1528         return f_name_cmp(*file1, *file2);
1529 }
1530
1531 /* Search for an identically-named item in the file list.  Note that the
1532  * items must agree in their directory-ness, or no match is returned. */
1533 int flist_find(struct file_list *flist, struct file_struct *f)
1534 {
1535         int low = flist->low, high = flist->high;
1536         int diff, mid, mid_up;
1537
1538         while (low <= high) {
1539                 mid = (low + high) / 2;
1540                 if (F_IS_ACTIVE(flist->files[mid]))
1541                         mid_up = mid;
1542                 else {
1543                         /* Scan for the next non-empty entry using the cached
1544                          * distance values.  If the value isn't fully up-to-
1545                          * date, update it. */
1546                         mid_up = mid + flist->files[mid]->dir.depth;
1547                         if (!F_IS_ACTIVE(flist->files[mid_up])) {
1548                                 do {
1549                                     mid_up += flist->files[mid_up]->dir.depth;
1550                                 } while (!F_IS_ACTIVE(flist->files[mid_up]));
1551                                 flist->files[mid]->dir.depth = mid_up - mid;
1552                         }
1553                         if (mid_up > high) {
1554                                 /* If there's nothing left above us, set high to
1555                                  * a non-empty entry below us and continue. */
1556                                 high = mid - (int)flist->files[mid]->len32;
1557                                 if (!F_IS_ACTIVE(flist->files[high])) {
1558                                         do {
1559                                             high -= (int)flist->files[high]->len32;
1560                                         } while (!F_IS_ACTIVE(flist->files[high]));
1561                                         flist->files[mid]->len32 = mid - high;
1562                                 }
1563                                 continue;
1564                         }
1565                 }
1566                 diff = f_name_cmp(flist->files[mid_up], f);
1567                 if (diff == 0) {
1568                         if (protocol_version < 29
1569                             && S_ISDIR(flist->files[mid_up]->mode)
1570                             != S_ISDIR(f->mode))
1571                                 return -1;
1572                         return mid_up;
1573                 }
1574                 if (diff < 0)
1575                         low = mid_up + 1;
1576                 else
1577                         high = mid - 1;
1578         }
1579         return -1;
1580 }
1581
1582 /*
1583  * Free up any resources a file_struct has allocated
1584  * and clear the file.
1585  */
1586 void clear_file(struct file_struct *file)
1587 {
1588         /* The +1 zeros out the first char of the basename. */
1589         memset(file, 0, FILE_STRUCT_LEN + 1);
1590         /* In an empty entry, dir.depth is an offset to the next non-empty
1591          * entry.  Likewise for len32 in the opposite direction.  We assume
1592          * that we're alone for now since flist_find() will adjust the counts
1593          * it runs into that aren't up-to-date. */
1594         file->len32 = file->dir.depth = 1;
1595 }
1596
1597 /* Allocate a new file list. */
1598 struct file_list *flist_new(char *msg)
1599 {
1600         struct file_list *flist;
1601
1602         flist = new(struct file_list);
1603         if (!flist)
1604                 out_of_memory(msg);
1605
1606         memset(flist, 0, sizeof flist[0]);
1607
1608         if (!(flist->file_pool = pool_create(FILE_EXTENT, 0, out_of_memory, POOL_INTERN)))
1609                 out_of_memory(msg);
1610
1611         return flist;
1612 }
1613
1614 /* Free up all elements in a flist. */
1615 void flist_free(struct file_list *flist)
1616 {
1617         pool_destroy(flist->file_pool);
1618         free(flist->files);
1619         free(flist);
1620 }
1621
1622 /*
1623  * This routine ensures we don't have any duplicate names in our file list.
1624  * duplicate names can cause corruption because of the pipelining
1625  */
1626 static void clean_flist(struct file_list *flist, int strip_root, int no_dups)
1627 {
1628         char fbuf[MAXPATHLEN];
1629         int i, prev_i = 0;
1630
1631         if (!flist)
1632                 return;
1633         if (flist->count == 0) {
1634                 flist->high = -1;
1635                 return;
1636         }
1637
1638         qsort(flist->files, flist->count,
1639             sizeof flist->files[0], (int (*)())file_compare);
1640
1641         for (i = no_dups? 0 : flist->count; i < flist->count; i++) {
1642                 if (F_IS_ACTIVE(flist->files[i])) {
1643                         prev_i = i;
1644                         break;
1645                 }
1646         }
1647         flist->low = prev_i;
1648         while (++i < flist->count) {
1649                 int j;
1650                 struct file_struct *file = flist->files[i];
1651
1652                 if (!F_IS_ACTIVE(file))
1653                         continue;
1654                 if (f_name_cmp(file, flist->files[prev_i]) == 0)
1655                         j = prev_i;
1656                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
1657                         int save_mode = file->mode;
1658                         /* Make sure that this directory doesn't duplicate a
1659                          * non-directory earlier in the list. */
1660                         flist->high = prev_i;
1661                         file->mode = S_IFREG;
1662                         j = flist_find(flist, file);
1663                         file->mode = save_mode;
1664                 } else
1665                         j = -1;
1666                 if (j >= 0) {
1667                         struct file_struct *fp = flist->files[j];
1668                         int keep, drop;
1669                         /* If one is a dir and the other is not, we want to
1670                          * keep the dir because it might have contents in the
1671                          * list. */
1672                         if (S_ISDIR(file->mode) != S_ISDIR(fp->mode)) {
1673                                 if (S_ISDIR(file->mode))
1674                                         keep = i, drop = j;
1675                                 else
1676                                         keep = j, drop = i;
1677                         } else
1678                                 keep = j, drop = i;
1679                         if (verbose > 1 && !am_server) {
1680                                 rprintf(FINFO,
1681                                         "removing duplicate name %s from file list (%d)\n",
1682                                         f_name(file, fbuf), drop);
1683                         }
1684                         /* Make sure we don't lose track of a user-specified
1685                          * top directory. */
1686                         flist->files[keep]->flags |= flist->files[drop]->flags
1687                                                    & (FLAG_TOP_DIR|FLAG_XFER_DIR);
1688
1689                         clear_file(flist->files[drop]);
1690
1691                         if (keep == i) {
1692                                 if (flist->low == drop) {
1693                                         for (j = drop + 1;
1694                                              j < i && !F_IS_ACTIVE(flist->files[j]);
1695                                              j++) {}
1696                                         flist->low = j;
1697                                 }
1698                                 prev_i = i;
1699                         }
1700                 } else
1701                         prev_i = i;
1702         }
1703         flist->high = no_dups ? prev_i : flist->count - 1;
1704
1705         if (strip_root) {
1706                 /* We need to strip off the leading slashes for relative
1707                  * paths, but this must be done _after_ the sorting phase. */
1708                 for (i = flist->low; i <= flist->high; i++) {
1709                         struct file_struct *file = flist->files[i];
1710
1711                         if (!file->dirname)
1712                                 continue;
1713                         while (*file->dirname == '/')
1714                                 file->dirname++;
1715                         if (!*file->dirname)
1716                                 file->dirname = NULL;
1717                 }
1718         }
1719
1720         if (prune_empty_dirs && no_dups) {
1721                 int j, prev_depth = 0;
1722
1723                 prev_i = 0; /* It's OK that this isn't really true. */
1724
1725                 for (i = flist->low; i <= flist->high; i++) {
1726                         struct file_struct *fp, *file = flist->files[i];
1727
1728                         /* This temporarily abuses the dir.depth value for a
1729                          * directory that is in a chain that might get pruned.
1730                          * We restore the old value if it gets a reprieve. */
1731                         if (S_ISDIR(file->mode) && file->dir.depth) {
1732                                 /* Dump empty dirs when coming back down. */
1733                                 for (j = prev_depth; j >= file->dir.depth; j--) {
1734                                         fp = flist->files[prev_i];
1735                                         if (fp->dir.depth >= 0)
1736                                                 break;
1737                                         prev_i = -fp->dir.depth-1;
1738                                         clear_file(fp);
1739                                 }
1740                                 prev_depth = file->dir.depth;
1741                                 if (is_excluded(f_name(file, fbuf), 1,
1742                                                        ALL_FILTERS)) {
1743                                         /* Keep dirs through this dir. */
1744                                         for (j = prev_depth-1; ; j--) {
1745                                                 fp = flist->files[prev_i];
1746                                                 if (fp->dir.depth >= 0)
1747                                                         break;
1748                                                 prev_i = -fp->dir.depth-1;
1749                                                 fp->dir.depth = j;
1750                                         }
1751                                 } else
1752                                         file->dir.depth = -prev_i-1;
1753                                 prev_i = i;
1754                         } else {
1755                                 /* Keep dirs through this non-dir. */
1756                                 for (j = prev_depth; ; j--) {
1757                                         fp = flist->files[prev_i];
1758                                         if (fp->dir.depth >= 0)
1759                                                 break;
1760                                         prev_i = -fp->dir.depth-1;
1761                                         fp->dir.depth = j;
1762                                 }
1763                         }
1764                 }
1765                 /* Dump empty all remaining empty dirs. */
1766                 while (1) {
1767                         struct file_struct *fp = flist->files[prev_i];
1768                         if (fp->dir.depth >= 0)
1769                                 break;
1770                         prev_i = -fp->dir.depth-1;
1771                         clear_file(fp);
1772                 }
1773
1774                 for (i = flist->low; i <= flist->high; i++) {
1775                         if (F_IS_ACTIVE(flist->files[i]))
1776                                 break;
1777                 }
1778                 flist->low = i;
1779                 for (i = flist->high; i >= flist->low; i--) {
1780                         if (F_IS_ACTIVE(flist->files[i]))
1781                                 break;
1782                 }
1783                 flist->high = i;
1784         }
1785 }
1786
1787 static void output_flist(struct file_list *flist)
1788 {
1789         char uidbuf[16], gidbuf[16], depthbuf[16];
1790         struct file_struct *file;
1791         const char *dir, *slash, *name, *trail;
1792         const char *who = who_am_i();
1793         int i;
1794
1795         for (i = 0; i < flist->count; i++) {
1796                 file = flist->files[i];
1797                 if ((am_root || am_sender) && preserve_uid) {
1798                         snprintf(uidbuf, sizeof uidbuf, " uid=%ld",
1799                                  (long)F_UID(file));
1800                 } else
1801                         *uidbuf = '\0';
1802                 if (preserve_gid && F_GID(file) != GID_NONE) {
1803                         snprintf(gidbuf, sizeof gidbuf, " gid=%ld",
1804                                  (long)F_GID(file));
1805                 } else
1806                         *gidbuf = '\0';
1807                 if (!am_sender)
1808                         snprintf(depthbuf, sizeof depthbuf, "%d", file->dir.depth);
1809                 if (F_IS_ACTIVE(file)) {
1810                         if ((dir = file->dirname) == NULL)
1811                                 dir = slash = "";
1812                         else
1813                                 slash = "/";
1814                         name = file->basename;
1815                         trail = S_ISDIR(file->mode) ? "/" : "";
1816                 } else
1817                         dir = slash = name = trail = "";
1818                 rprintf(FINFO, "[%s] i=%d %s %s%s%s%s mode=0%o len=%.0f%s%s flags=%x\n",
1819                         who, i, am_sender ? NS(file->dir.root) : depthbuf,
1820                         dir, slash, name, trail, (int)file->mode,
1821                         (double)F_LENGTH(file), uidbuf, gidbuf, file->flags);
1822         }
1823 }
1824
1825 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
1826 enum fnc_type { t_PATH, t_ITEM };
1827
1828 /* Compare the names of two file_struct entities, similar to how strcmp()
1829  * would do if it were operating on the joined strings.
1830  *
1831  * Some differences beginning with protocol_version 29: (1) directory names
1832  * are compared with an assumed trailing slash so that they compare in a
1833  * way that would cause them to sort immediately prior to any content they
1834  * may have; (2) a directory of any name compares after a non-directory of
1835  * any name at the same depth; (3) a directory with name "." compares prior
1836  * to anything else.  These changes mean that a directory and a non-dir
1837  * with the same name will not compare as equal (protocol_version >= 29).
1838  *
1839  * The dirname component can be an empty string, but the basename component
1840  * cannot (and never is in the current codebase).  The basename component
1841  * may be NULL (for a removed item), in which case it is considered to be
1842  * after any existing item. */
1843 int f_name_cmp(struct file_struct *f1, struct file_struct *f2)
1844 {
1845         int dif;
1846         const uchar *c1, *c2;
1847         enum fnc_state state1, state2;
1848         enum fnc_type type1, type2;
1849         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
1850
1851         if (!f1 || !F_IS_ACTIVE(f1)) {
1852                 if (!f2 || !F_IS_ACTIVE(f2))
1853                         return 0;
1854                 return -1;
1855         }
1856         if (!f2 || !F_IS_ACTIVE(f2))
1857                 return 1;
1858
1859         c1 = (uchar*)f1->dirname;
1860         c2 = (uchar*)f2->dirname;
1861         if (c1 == c2)
1862                 c1 = c2 = NULL;
1863         if (!c1) {
1864                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
1865                 c1 = (const uchar*)f1->basename;
1866                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
1867                         type1 = t_ITEM;
1868                         state1 = s_TRAILING;
1869                         c1 = (uchar*)"";
1870                 } else
1871                         state1 = s_BASE;
1872         } else {
1873                 type1 = t_path;
1874                 state1 = s_DIR;
1875         }
1876         if (!c2) {
1877                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
1878                 c2 = (const uchar*)f2->basename;
1879                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
1880                         type2 = t_ITEM;
1881                         state2 = s_TRAILING;
1882                         c2 = (uchar*)"";
1883                 } else
1884                         state2 = s_BASE;
1885         } else {
1886                 type2 = t_path;
1887                 state2 = s_DIR;
1888         }
1889
1890         if (type1 != type2)
1891                 return type1 == t_PATH ? 1 : -1;
1892
1893         do {
1894                 if (!*c1) {
1895                         switch (state1) {
1896                         case s_DIR:
1897                                 state1 = s_SLASH;
1898                                 c1 = (uchar*)"/";
1899                                 break;
1900                         case s_SLASH:
1901                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
1902                                 c1 = (const uchar*)f1->basename;
1903                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
1904                                         type1 = t_ITEM;
1905                                         state1 = s_TRAILING;
1906                                         c1 = (uchar*)"";
1907                                 } else
1908                                         state1 = s_BASE;
1909                                 break;
1910                         case s_BASE:
1911                                 state1 = s_TRAILING;
1912                                 if (type1 == t_PATH) {
1913                                         c1 = (uchar*)"/";
1914                                         break;
1915                                 }
1916                                 /* FALL THROUGH */
1917                         case s_TRAILING:
1918                                 type1 = t_ITEM;
1919                                 break;
1920                         }
1921                         if (*c2 && type1 != type2)
1922                                 return type1 == t_PATH ? 1 : -1;
1923                 }
1924                 if (!*c2) {
1925                         switch (state2) {
1926                         case s_DIR:
1927                                 state2 = s_SLASH;
1928                                 c2 = (uchar*)"/";
1929                                 break;
1930                         case s_SLASH:
1931                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
1932                                 c2 = (const uchar*)f2->basename;
1933                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
1934                                         type2 = t_ITEM;
1935                                         state2 = s_TRAILING;
1936                                         c2 = (uchar*)"";
1937                                 } else
1938                                         state2 = s_BASE;
1939                                 break;
1940                         case s_BASE:
1941                                 state2 = s_TRAILING;
1942                                 if (type2 == t_PATH) {
1943                                         c2 = (uchar*)"/";
1944                                         break;
1945                                 }
1946                                 /* FALL THROUGH */
1947                         case s_TRAILING:
1948                                 if (!*c1)
1949                                         return 0;
1950                                 type2 = t_ITEM;
1951                                 break;
1952                         }
1953                         if (type1 != type2)
1954                                 return type1 == t_PATH ? 1 : -1;
1955                 }
1956         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
1957
1958         return dif;
1959 }
1960
1961 char *f_name_buf(void)
1962 {
1963         static char names[5][MAXPATHLEN];
1964         static unsigned int n;
1965
1966         n = (n + 1) % (sizeof names / sizeof names[0]);
1967
1968         return names[n];
1969 }
1970
1971 /* Return a copy of the full filename of a flist entry, using the indicated
1972  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
1973  * done because we checked the size when creating the file_struct entry.
1974  */
1975 char *f_name(struct file_struct *f, char *fbuf)
1976 {
1977         if (!f || !F_IS_ACTIVE(f))
1978                 return NULL;
1979
1980         if (!fbuf)
1981                 fbuf = f_name_buf();
1982
1983         if (f->dirname) {
1984                 int len = strlen(f->dirname);
1985                 memcpy(fbuf, f->dirname, len);
1986                 fbuf[len] = '/';
1987                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
1988         } else
1989                 strlcpy(fbuf, f->basename, MAXPATHLEN);
1990
1991         return fbuf;
1992 }
1993
1994 /* Do a non-recursive scan of the named directory, possibly ignoring all
1995  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
1996  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
1997  * buffer (the functions we call will append names onto the end, but the old
1998  * dir value will be restored on exit). */
1999 struct file_list *get_dirlist(char *dirname, int dlen, int ignore_filter_rules)
2000 {
2001         struct file_list *dirlist;
2002         char dirbuf[MAXPATHLEN];
2003         int save_recurse = recurse;
2004         int save_xfer_dirs = xfer_dirs;
2005
2006         if (dlen < 0) {
2007                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
2008                 if (dlen >= MAXPATHLEN)
2009                         return NULL;
2010                 dirname = dirbuf;
2011         }
2012
2013         dirlist = flist_new("get_dirlist");
2014
2015         recurse = 0;
2016         xfer_dirs = 1;
2017         send_directory(ignore_filter_rules ? -2 : -1, dirlist, dirname, dlen);
2018         xfer_dirs = save_xfer_dirs;
2019         recurse = save_recurse;
2020         if (do_progress)
2021                 flist_count_offset += dirlist->count;
2022
2023         clean_flist(dirlist, 0, 0);
2024
2025         if (verbose > 3)
2026                 output_flist(dirlist);
2027
2028         return dirlist;
2029 }