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