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) 2002-2009 Wayne Davison
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 3 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, visit the http://fsf.org website.
  21  */
  22
  23 #include "rsync.h"
  24 #include "ifuncs.h"
  25 #include "rounding.h"
  26 #include "inums.h"
  27 #include "io.h"
  28
  29 extern int am_root;
  30 extern int am_server;
  31 extern int am_daemon;
  32 extern int am_sender;
  33 extern int am_generator;
  34 extern int inc_recurse;
  35 extern int always_checksum;
  36 extern int module_id;
  37 extern int ignore_errors;
  38 extern int numeric_ids;
  39 extern int recurse;
  40 extern int use_qsort;
  41 extern int xfer_dirs;
  42 extern int filesfrom_fd;
  43 extern int one_file_system;
  44 extern int copy_dirlinks;
  45 extern int keep_dirlinks;
  46 extern int preserve_uid;
  47 extern int preserve_gid;
  48 extern int preserve_acls;
  49 extern int preserve_xattrs;
  50 extern int preserve_links;
  51 extern int preserve_hard_links;
  52 extern int preserve_devices;
  53 extern int preserve_specials;
  54 extern int missing_args;
  55 extern int uid_ndx;
  56 extern int gid_ndx;
  57 extern int eol_nulls;
  58 extern int relative_paths;
  59 extern int implied_dirs;
  60 extern int file_extra_cnt;
  61 extern int ignore_perishable;
  62 extern int non_perishable_cnt;
  63 extern int prune_empty_dirs;
  64 extern int copy_links;
  65 extern int copy_unsafe_links;
  66 extern int protocol_version;
  67 extern int sanitize_paths;
  68 extern int munge_symlinks;
  69 extern int need_unsorted_flist;
  70 extern int sender_symlink_iconv;
  71 extern int output_needs_newline;
  72 extern int sender_keeps_checksum;
  73 extern int unsort_ndx;
  74 extern struct stats stats;
  75 extern char *filesfrom_host;
  76 extern char *usermap, *groupmap;
  77
  78 extern char curr_dir[MAXPATHLEN];
  79
  80 extern struct chmod_mode_struct *chmod_modes;
  81
  82 extern filter_rule_list filter_list;
  83 extern filter_rule_list daemon_filter_list;
  84
  85 #ifdef ICONV_OPTION
  86 extern int filesfrom_convert;
  87 extern iconv_t ic_send, ic_recv;
  88 #endif
  89
  90 #ifdef HAVE_UTIMENSAT
  91 #ifdef HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC
  92 #define ST_MTIME_NSEC st_mtim.tv_nsec
  93 #elif defined(HAVE_STRUCT_STAT_ST_MTIMENSEC)
  94 #define ST_MTIME_NSEC st_mtimensec
  95 #endif
  96 #endif
  97
  98 #define PTR_SIZE (sizeof (struct file_struct *))
  99
 100 int io_error;
 101 int checksum_len;
 102 dev_t filesystem_dev; /* used to implement -x */
 103
 104 struct file_list *cur_flist, *first_flist, *dir_flist;
 105 int send_dir_ndx = -1, send_dir_depth = -1;
 106 int flist_cnt = 0; /* how many (non-tmp) file list objects exist */
 107 int file_total = 0; /* total of all active items over all file-lists */
 108 int file_old_total = 0; /* total of active items that will soon be gone */
 109 int flist_eof = 0; /* all the file-lists are now known */
 110
 111 #define NORMAL_NAME 0
 112 #define SLASH_ENDING_NAME 1
 113 #define DOTDIR_NAME 2
 114
 115 /* Starting from protocol version 26, we always use 64-bit ino_t and dev_t
 116  * internally, even if this platform does not allow files to have 64-bit inums.
 117  * The only exception is if we're on a platform with no 64-bit type at all.
 118  *
 119  * Because we use read_longint() to get these off the wire, if you transfer
 120  * devices or (for protocols < 30) hardlinks with dev or inum > 2**32 to a
 121  * machine with no 64-bit types then you will get an overflow error.
 122  *
 123  * Note that if you transfer devices from a 64-bit-devt machine (say, Solaris)
 124  * to a 32-bit-devt machine (say, Linux-2.2/x86) then the device numbers will
 125  * be truncated.  But it's a kind of silly thing to do anyhow. */
 126
 127 /* The tmp_* vars are used as a cache area by make_file() to store data
 128  * that the sender doesn't need to remember in its file list.  The data
 129  * will survive just long enough to be used by send_file_entry(). */
 130 static dev_t tmp_rdev;
 131 #ifdef SUPPORT_HARD_LINKS
 132 static int64 tmp_dev, tmp_ino;
 133 #endif
 134 static char tmp_sum[MAX_DIGEST_LEN];
 135
 136 static char empty_sum[MAX_DIGEST_LEN];
 137 static int flist_count_offset; /* for --delete --progress */
 138
 139 static void flist_sort_and_clean(struct file_list *flist, int strip_root);
 140 static void output_flist(struct file_list *flist);
 141
 142 void init_flist(void)
 143 {
 144         if (DEBUG_GTE(FLIST, 4)) {
 145                 rprintf(FINFO, "FILE_STRUCT_LEN=%d, EXTRA_LEN=%d\n",
 146                         (int)FILE_STRUCT_LEN, (int)EXTRA_LEN);
 147         }
 148         checksum_len = protocol_version < 21 ? 2
 149                      : protocol_version < 30 ? MD4_DIGEST_LEN
 150                      : MD5_DIGEST_LEN;
 151 }
 152
 153 static int show_filelist_p(void)
 154 {
 155         return INFO_GTE(FLIST, 1) && xfer_dirs && !am_server && !inc_recurse;
 156 }
 157
 158 static void start_filelist_progress(char *kind)
 159 {
 160         rprintf(FCLIENT, "%s ... ", kind);
 161         output_needs_newline = 1;
 162         rflush(FINFO);
 163 }
 164
 165 static void emit_filelist_progress(int count)
 166 {
 167         rprintf(FCLIENT, " %d files...\r", count);
 168 }
 169
 170 static void maybe_emit_filelist_progress(int count)
 171 {
 172         if (INFO_GTE(FLIST, 2) && show_filelist_p() && (count % 100) == 0)
 173                 emit_filelist_progress(count);
 174 }
 175
 176 static void finish_filelist_progress(const struct file_list *flist)
 177 {
 178         if (INFO_GTE(FLIST, 2)) {
 179                 /* This overwrites the progress line */
 180                 rprintf(FINFO, "%d file%sto consider\n",
 181                         flist->used, flist->used == 1 ? " " : "s ");
 182         } else {
 183                 output_needs_newline = 0;
 184                 rprintf(FINFO, "done\n");
 185         }
 186 }
 187
 188 void show_flist_stats(void)
 189 {
 190         /* Nothing yet */
 191 }
 192
 193 /* Stat either a symlink or its referent, depending on the settings of
 194  * copy_links, copy_unsafe_links, etc.  Returns -1 on error, 0 on success.
 195  *
 196  * If path is the name of a symlink, then the linkbuf buffer (which must hold
 197  * MAXPATHLEN chars) will be set to the symlink's target string.
 198  *
 199  * The stat structure pointed to by stp will contain information about the
 200  * link or the referent as appropriate, if they exist. */
 201 static int readlink_stat(const char *path, STRUCT_STAT *stp, char *linkbuf)
 202 {
 203 #ifdef SUPPORT_LINKS
 204         if (link_stat(path, stp, copy_dirlinks) < 0)
 205                 return -1;
 206         if (S_ISLNK(stp->st_mode)) {
 207                 int llen = do_readlink(path, linkbuf, MAXPATHLEN - 1);
 208                 if (llen < 0)
 209                         return -1;
 210                 linkbuf[llen] = '\0';
 211                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 212                         if (INFO_GTE(SYMSAFE, 1)) {
 213                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 214                                         path, linkbuf);
 215                         }
 216                         return x_stat(path, stp, NULL);
 217                 }
 218                 if (munge_symlinks && am_sender && llen > SYMLINK_PREFIX_LEN
 219                  && strncmp(linkbuf, SYMLINK_PREFIX, SYMLINK_PREFIX_LEN) == 0) {
 220                         memmove(linkbuf, linkbuf + SYMLINK_PREFIX_LEN,
 221                                 llen - SYMLINK_PREFIX_LEN + 1);
 222                 }
 223         }
 224         return 0;
 225 #else
 226         return x_stat(path, stp, NULL);
 227 #endif
 228 }
 229
 230 int link_stat(const char *path, STRUCT_STAT *stp, int follow_dirlinks)
 231 {
 232 #ifdef SUPPORT_LINKS
 233         if (copy_links)
 234                 return x_stat(path, stp, NULL);
 235         if (x_lstat(path, stp, NULL) < 0)
 236                 return -1;
 237         if (follow_dirlinks && S_ISLNK(stp->st_mode)) {
 238                 STRUCT_STAT st;
 239                 if (x_stat(path, &st, NULL) == 0 && S_ISDIR(st.st_mode))
 240                         *stp = st;
 241         }
 242         return 0;
 243 #else
 244         return x_stat(path, stp, NULL);
 245 #endif
 246 }
 247
 248 static inline int is_daemon_excluded(const char *fname, int is_dir)
 249 {
 250         if (daemon_filter_list.head
 251          && check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
 252                 errno = ENOENT;
 253                 return 1;
 254         }
 255         return 0;
 256 }
 257
 258 static inline int path_is_daemon_excluded(char *path, int ignore_filename)
 259 {
 260         if (daemon_filter_list.head) {
 261                 char *slash = path;
 262
 263                 while ((slash = strchr(slash+1, '/')) != NULL) {
 264                         int ret;
 265                         *slash = '\0';
 266                         ret = check_filter(&daemon_filter_list, FLOG, path, 1);
 267                         *slash = '/';
 268                         if (ret < 0) {
 269                                 errno = ENOENT;
 270                                 return 1;
 271                         }
 272                 }
 273
 274                 if (!ignore_filename
 275                  && check_filter(&daemon_filter_list, FLOG, path, 1) < 0) {
 276                         errno = ENOENT;
 277                         return 1;
 278                 }
 279         }
 280
 281         return 0;
 282 }
 283
 284 /* This function is used to check if a file should be included/excluded
 285  * from the list of files based on its name and type etc.  The value of
 286  * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
 287 static int is_excluded(const char *fname, int is_dir, int filter_level)
 288 {
 289 #if 0 /* This currently never happens, so avoid a useless compare. */
 290         if (filter_level == NO_FILTERS)
 291                 return 0;
 292 #endif
 293         if (is_daemon_excluded(fname, is_dir))
 294                 return 1;
 295         if (filter_level != ALL_FILTERS)
 296                 return 0;
 297         if (filter_list.head
 298             && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
 299                 return 1;
 300         return 0;
 301 }
 302
 303 static void send_directory(int f, struct file_list *flist,
 304                            char *fbuf, int len, int flags);
 305
 306 static const char *pathname, *orig_dir;
 307 static int pathname_len;
 308
 309 /* Make sure flist can hold at least flist->used + extra entries. */
 310 static void flist_expand(struct file_list *flist, int extra)
 311 {
 312         struct file_struct **new_ptr;
 313
 314         if (flist->used + extra <= flist->malloced)
 315                 return;
 316
 317         if (flist->malloced < FLIST_START)
 318                 flist->malloced = FLIST_START;
 319         else if (flist->malloced >= FLIST_LINEAR)
 320                 flist->malloced += FLIST_LINEAR;
 321         else
 322                 flist->malloced *= 2;
 323
 324         /* In case count jumped or we are starting the list
 325          * with a known size just set it. */
 326         if (flist->malloced < flist->used + extra)
 327                 flist->malloced = flist->used + extra;
 328
 329         new_ptr = realloc_array(flist->files, struct file_struct *,
 330                                 flist->malloced);
 331
 332         if (DEBUG_GTE(FLIST, 1) && flist->malloced != FLIST_START) {
 333                 rprintf(FCLIENT, "[%s] expand file_list pointer array to %s bytes, did%s move\n",
 334                     who_am_i(),
 335                     big_num(sizeof flist->files[0] * flist->malloced),
 336                     (new_ptr == flist->files) ? " not" : "");
 337         }
 338
 339         flist->files = new_ptr;
 340
 341         if (!flist->files)
 342                 out_of_memory("flist_expand");
 343 }
 344
 345 static void flist_done_allocating(struct file_list *flist)
 346 {
 347         void *ptr = pool_boundary(flist->file_pool, 8*1024);
 348         if (flist->pool_boundary == ptr)
 349                 flist->pool_boundary = NULL; /* list didn't use any pool memory */
 350         else
 351                 flist->pool_boundary = ptr;
 352 }
 353
 354 /* Call this with EITHER (1) "file, NULL, 0" to chdir() to the file's
 355  * F_PATHNAME(), or (2) "NULL, dir, dirlen" to chdir() to the supplied dir,
 356  * with dir == NULL taken to be the starting directory, and dirlen < 0
 357  * indicating that strdup(dir) should be called and then the -dirlen length
 358  * value checked to ensure that it is not daemon-excluded. */
 359 int change_pathname(struct file_struct *file, const char *dir, int dirlen)
 360 {
 361         if (dirlen < 0) {
 362                 char *cpy = strdup(dir);
 363                 if (*cpy != '/')
 364                         change_dir(orig_dir, CD_SKIP_CHDIR);
 365                 if (path_is_daemon_excluded(cpy, 0))
 366                         goto chdir_error;
 367                 dir = cpy;
 368                 dirlen = -dirlen;
 369         } else {
 370                 if (file) {
 371                         if (pathname == F_PATHNAME(file))
 372                                 return 1;
 373                         dir = F_PATHNAME(file);
 374                         if (dir)
 375                                 dirlen = strlen(dir);
 376                 } else if (pathname == dir)
 377                         return 1;
 378                 if (dir && *dir != '/')
 379                         change_dir(orig_dir, CD_SKIP_CHDIR);
 380         }
 381
 382         pathname = dir;
 383         pathname_len = dirlen;
 384
 385         if (!dir)
 386                 dir = orig_dir;
 387
 388         if (!change_dir(dir, CD_NORMAL)) {
 389           chdir_error:
 390                 io_error |= IOERR_GENERAL;
 391                 rsyserr(FERROR_XFER, errno, "change_dir %s failed", full_fname(dir));
 392                 if (dir != orig_dir)
 393                         change_dir(orig_dir, CD_NORMAL);
 394                 pathname = NULL;
 395                 pathname_len = 0;
 396                 return 0;
 397         }
 398
 399         return 1;
 400 }
 401
 402 static void send_file_entry(int f, const char *fname, struct file_struct *file,
 403 #ifdef SUPPORT_LINKS
 404                             const char *symlink_name, int symlink_len,
 405 #endif
 406                             int ndx, int first_ndx)
 407 {
 408         static time_t modtime;
 409         static mode_t mode;
 410 #ifdef SUPPORT_HARD_LINKS
 411         static int64 dev;
 412 #endif
 413         static dev_t rdev;
 414         static uint32 rdev_major;
 415         static uid_t uid;
 416         static gid_t gid;
 417         static const char *user_name, *group_name;
 418         static char lastname[MAXPATHLEN];
 419 #ifdef SUPPORT_HARD_LINKS
 420         int first_hlink_ndx = -1;
 421 #endif
 422         int l1, l2;
 423         int xflags;
 424
 425         /* Initialize starting value of xflags and adjust counts. */
 426         if (S_ISREG(file->mode))
 427                 xflags = 0;
 428         else if (S_ISDIR(file->mode)) {
 429                 stats.num_dirs++;
 430                 if (protocol_version >= 30) {
 431                         if (file->flags & FLAG_CONTENT_DIR)
 432                                 xflags = file->flags & FLAG_TOP_DIR;
 433                         else if (file->flags & FLAG_IMPLIED_DIR)
 434                                 xflags = XMIT_TOP_DIR | XMIT_NO_CONTENT_DIR;
 435                         else
 436                                 xflags = XMIT_NO_CONTENT_DIR;
 437                 } else
 438                         xflags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */
 439         } else {
 440                 if (S_ISLNK(file->mode))
 441                         stats.num_symlinks++;
 442                 else if (IS_DEVICE(file->mode))
 443                         stats.num_devices++;
 444                 else if (IS_SPECIAL(file->mode))
 445                         stats.num_specials++;
 446                 xflags = 0;
 447         }
 448
 449         if (file->mode == mode)
 450                 xflags |= XMIT_SAME_MODE;
 451         else
 452                 mode = file->mode;
 453
 454         if (preserve_devices && IS_DEVICE(mode)) {
 455                 if (protocol_version < 28) {
 456                         if (tmp_rdev == rdev)
 457                                 xflags |= XMIT_SAME_RDEV_pre28;
 458                         else
 459                                 rdev = tmp_rdev;
 460                 } else {
 461                         rdev = tmp_rdev;
 462                         if ((uint32)major(rdev) == rdev_major)
 463                                 xflags |= XMIT_SAME_RDEV_MAJOR;
 464                         else
 465                                 rdev_major = major(rdev);
 466                         if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu)
 467                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
 468                 }
 469         } else if (preserve_specials && IS_SPECIAL(mode) && protocol_version < 31) {
 470                 /* Special files don't need an rdev number, so just make
 471                  * the historical transmission of the value efficient. */
 472                 if (protocol_version < 28)
 473                         xflags |= XMIT_SAME_RDEV_pre28;
 474                 else {
 475                         rdev = MAKEDEV(major(rdev), 0);
 476                         xflags |= XMIT_SAME_RDEV_MAJOR;
 477                         if (protocol_version < 30)
 478                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
 479                 }
 480         } else if (protocol_version < 28)
 481                 rdev = MAKEDEV(0, 0);
 482         if (!preserve_uid || ((uid_t)F_OWNER(file) == uid && *lastname))
 483                 xflags |= XMIT_SAME_UID;
 484         else {
 485                 uid = F_OWNER(file);
 486                 if (!numeric_ids) {
 487                         user_name = add_uid(uid);
 488                         if (inc_recurse && user_name)
 489                                 xflags |= XMIT_USER_NAME_FOLLOWS;
 490                 }
 491         }
 492         if (!preserve_gid || ((gid_t)F_GROUP(file) == gid && *lastname))
 493                 xflags |= XMIT_SAME_GID;
 494         else {
 495                 gid = F_GROUP(file);
 496                 if (!numeric_ids) {
 497                         group_name = add_gid(gid);
 498                         if (inc_recurse && group_name)
 499                                 xflags |= XMIT_GROUP_NAME_FOLLOWS;
 500                 }
 501         }
 502         if (file->modtime == modtime)
 503                 xflags |= XMIT_SAME_TIME;
 504         else
 505                 modtime = file->modtime;
 506         if (NSEC_BUMP(file) && protocol_version >= 31)
 507                 xflags |= XMIT_MOD_NSEC;
 508
 509 #ifdef SUPPORT_HARD_LINKS
 510         if (tmp_dev != 0) {
 511                 if (protocol_version >= 30) {
 512                         struct ht_int64_node *np = idev_find(tmp_dev, tmp_ino);
 513                         first_hlink_ndx = (int32)(long)np->data - 1;
 514                         if (first_hlink_ndx < 0) {
 515                                 np->data = (void*)(long)(first_ndx + ndx + 1);
 516                                 xflags |= XMIT_HLINK_FIRST;
 517                         }
 518                         if (DEBUG_GTE(HLINK, 1)) {
 519                                 if (first_hlink_ndx >= 0) {
 520                                         rprintf(FINFO, "[%s] #%d hard-links #%d (%sabbrev)\n",
 521                                                 who_am_i(), first_ndx + ndx, first_hlink_ndx,
 522                                                 first_hlink_ndx >= first_ndx ? "" : "un");
 523                                 } else if (DEBUG_GTE(HLINK, 3)) {
 524                                         rprintf(FINFO, "[%s] dev:inode for #%d is %s:%s\n",
 525                                                 who_am_i(), first_ndx + ndx,
 526                                                 big_num(tmp_dev), big_num(tmp_ino));
 527                                 }
 528                         }
 529                 } else {
 530                         if (tmp_dev == dev) {
 531                                 if (protocol_version >= 28)
 532                                         xflags |= XMIT_SAME_DEV_pre30;
 533                         } else
 534                                 dev = tmp_dev;
 535                 }
 536                 xflags |= XMIT_HLINKED;
 537         }
 538 #endif
 539
 540         for (l1 = 0;
 541             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 542             l1++) {}
 543         l2 = strlen(fname+l1);
 544
 545         if (l1 > 0)
 546                 xflags |= XMIT_SAME_NAME;
 547         if (l2 > 255)
 548                 xflags |= XMIT_LONG_NAME;
 549
 550         /* We must make sure we don't send a zero flag byte or the
 551          * other end will terminate the flist transfer.  Note that
 552          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 553          * it's harmless way to add a bit to the first flag byte. */
 554         if (protocol_version >= 28) {
 555                 if (!xflags && !S_ISDIR(mode))
 556                         xflags |= XMIT_TOP_DIR;
 557                 if ((xflags & 0xFF00) || !xflags) {
 558                         xflags |= XMIT_EXTENDED_FLAGS;
 559                         write_shortint(f, xflags);
 560                 } else
 561                         write_byte(f, xflags);
 562         } else {
 563                 if (!(xflags & 0xFF))
 564                         xflags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
 565                 write_byte(f, xflags);
 566         }
 567         if (xflags & XMIT_SAME_NAME)
 568                 write_byte(f, l1);
 569         if (xflags & XMIT_LONG_NAME)
 570                 write_varint30(f, l2);
 571         else
 572                 write_byte(f, l2);
 573         write_buf(f, fname + l1, l2);
 574
 575 #ifdef SUPPORT_HARD_LINKS
 576         if (first_hlink_ndx >= 0) {
 577                 write_varint(f, first_hlink_ndx);
 578                 if (first_hlink_ndx >= first_ndx)
 579                         goto the_end;
 580         }
 581 #endif
 582
 583         write_varlong30(f, F_LENGTH(file), 3);
 584         if (!(xflags & XMIT_SAME_TIME)) {
 585                 if (protocol_version >= 30)
 586                         write_varlong(f, modtime, 4);
 587                 else
 588                         write_int(f, modtime);
 589         }
 590         if (xflags & XMIT_MOD_NSEC)
 591                 write_varint(f, F_MOD_NSEC(file));
 592         if (!(xflags & XMIT_SAME_MODE))
 593                 write_int(f, to_wire_mode(mode));
 594         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
 595                 if (protocol_version < 30)
 596                         write_int(f, uid);
 597                 else {
 598                         write_varint(f, uid);
 599                         if (xflags & XMIT_USER_NAME_FOLLOWS) {
 600                                 int len = strlen(user_name);
 601                                 write_byte(f, len);
 602                                 write_buf(f, user_name, len);
 603                         }
 604                 }
 605         }
 606         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
 607                 if (protocol_version < 30)
 608                         write_int(f, gid);
 609                 else {
 610                         write_varint(f, gid);
 611                         if (xflags & XMIT_GROUP_NAME_FOLLOWS) {
 612                                 int len = strlen(group_name);
 613                                 write_byte(f, len);
 614                                 write_buf(f, group_name, len);
 615                         }
 616                 }
 617         }
 618         if ((preserve_devices && IS_DEVICE(mode))
 619          || (preserve_specials && IS_SPECIAL(mode) && protocol_version < 31)) {
 620                 if (protocol_version < 28) {
 621                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 622                                 write_int(f, (int)rdev);
 623                 } else {
 624                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 625                                 write_varint30(f, major(rdev));
 626                         if (protocol_version >= 30)
 627                                 write_varint(f, minor(rdev));
 628                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 629                                 write_byte(f, minor(rdev));
 630                         else
 631                                 write_int(f, minor(rdev));
 632                 }
 633         }
 634
 635 #ifdef SUPPORT_LINKS
 636         if (symlink_len) {
 637                 write_varint30(f, symlink_len);
 638                 write_buf(f, symlink_name, symlink_len);
 639         }
 640 #endif
 641
 642 #ifdef SUPPORT_HARD_LINKS
 643         if (tmp_dev != 0 && protocol_version < 30) {
 644                 if (protocol_version < 26) {
 645                         /* 32-bit dev_t and ino_t */
 646                         write_int(f, (int32)dev);
 647                         write_int(f, (int32)tmp_ino);
 648                 } else {
 649                         /* 64-bit dev_t and ino_t */
 650                         if (!(xflags & XMIT_SAME_DEV_pre30))
 651                                 write_longint(f, dev);
 652                         write_longint(f, tmp_ino);
 653                 }
 654         }
 655 #endif
 656
 657         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 658                 const char *sum;
 659                 if (S_ISREG(mode))
 660                         sum = tmp_sum;
 661                 else {
 662                         /* Prior to 28, we sent a useless set of nulls. */
 663                         sum = empty_sum;
 664                 }
 665                 write_buf(f, sum, checksum_len);
 666         }
 667
 668 #ifdef SUPPORT_HARD_LINKS
 669   the_end:
 670 #endif
 671         strlcpy(lastname, fname, MAXPATHLEN);
 672
 673         if (S_ISREG(mode) || S_ISLNK(mode))
 674                 stats.total_size += F_LENGTH(file);
 675 }
 676
 677 static struct file_struct *recv_file_entry(int f, struct file_list *flist, int xflags)
 678 {
 679         static int64 modtime;
 680         static mode_t mode;
 681 #ifdef SUPPORT_HARD_LINKS
 682         static int64 dev;
 683 #endif
 684         static dev_t rdev;
 685         static uint32 rdev_major;
 686         static uid_t uid;
 687         static gid_t gid;
 688         static uint16 gid_flags;
 689         static char lastname[MAXPATHLEN], *lastdir;
 690         static int lastdir_depth, lastdir_len = -1;
 691         static unsigned int del_hier_name_len = 0;
 692         static int in_del_hier = 0;
 693         char thisname[MAXPATHLEN];
 694         unsigned int l1 = 0, l2 = 0;
 695         int alloc_len, basename_len, linkname_len;
 696         int extra_len = file_extra_cnt * EXTRA_LEN;
 697         int first_hlink_ndx = -1;
 698         int64 file_length;
 699         uint32 modtime_nsec;
 700         const char *basename;
 701         struct file_struct *file;
 702         alloc_pool_t *pool;
 703         char *bp;
 704
 705         if (xflags & XMIT_SAME_NAME)
 706                 l1 = read_byte(f);
 707
 708         if (xflags & XMIT_LONG_NAME)
 709                 l2 = read_varint30(f);
 710         else
 711                 l2 = read_byte(f);
 712
 713         if (l2 >= MAXPATHLEN - l1) {
 714                 rprintf(FERROR,
 715                         "overflow: xflags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
 716                         xflags, l1, l2, lastname, who_am_i());
 717                 overflow_exit("recv_file_entry");
 718         }
 719
 720         strlcpy(thisname, lastname, l1 + 1);
 721         read_sbuf(f, &thisname[l1], l2);
 722         thisname[l1 + l2] = 0;
 723
 724         /* Abuse basename_len for a moment... */
 725         basename_len = strlcpy(lastname, thisname, MAXPATHLEN);
 726
 727 #ifdef ICONV_OPTION
 728         if (ic_recv != (iconv_t)-1) {
 729                 xbuf outbuf, inbuf;
 730
 731                 INIT_CONST_XBUF(outbuf, thisname);
 732                 INIT_XBUF(inbuf, lastname, basename_len, (size_t)-1);
 733
 734                 if (iconvbufs(ic_recv, &inbuf, &outbuf, 0) < 0) {
 735                         io_error |= IOERR_GENERAL;
 736                         rprintf(FERROR_UTF8,
 737                             "[%s] cannot convert filename: %s (%s)\n",
 738                             who_am_i(), lastname, strerror(errno));
 739                         outbuf.len = 0;
 740                 }
 741                 thisname[outbuf.len] = '\0';
 742         }
 743 #endif
 744
 745         if (*thisname)
 746                 clean_fname(thisname, 0);
 747
 748         if (sanitize_paths)
 749                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
 750
 751         if ((basename = strrchr(thisname, '/')) != NULL) {
 752                 int len = basename++ - thisname;
 753                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
 754                         lastdir = new_array(char, len + 1);
 755                         memcpy(lastdir, thisname, len);
 756                         lastdir[len] = '\0';
 757                         lastdir_len = len;
 758                         lastdir_depth = count_dir_elements(lastdir);
 759                 }
 760         } else
 761                 basename = thisname;
 762         basename_len = strlen(basename) + 1; /* count the '\0' */
 763
 764 #ifdef SUPPORT_HARD_LINKS
 765         if (protocol_version >= 30
 766          && BITS_SETnUNSET(xflags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
 767                 first_hlink_ndx = read_varint(f);
 768                 if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->ndx_start + flist->used) {
 769                         rprintf(FERROR,
 770                                 "hard-link reference out of range: %d (%d)\n",
 771                                 first_hlink_ndx, flist->ndx_start + flist->used);
 772                         exit_cleanup(RERR_PROTOCOL);
 773                 }
 774                 if (DEBUG_GTE(HLINK, 1)) {
 775                         rprintf(FINFO, "[%s] #%d hard-links #%d (%sabbrev)\n",
 776                                 who_am_i(), flist->used+flist->ndx_start, first_hlink_ndx,
 777                                 first_hlink_ndx >= flist->ndx_start ? "" : "un");
 778                 }
 779                 if (first_hlink_ndx >= flist->ndx_start) {
 780                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 781                         file_length = F_LENGTH(first);
 782                         modtime = first->modtime;
 783                         modtime_nsec = F_MOD_NSEC(first);
 784                         mode = first->mode;
 785                         if (preserve_uid)
 786                                 uid = F_OWNER(first);
 787                         if (preserve_gid)
 788                                 gid = F_GROUP(first);
 789                         if (preserve_devices && IS_DEVICE(mode)) {
 790                                 uint32 *devp = F_RDEV_P(first);
 791                                 rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
 792                                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 793                         }
 794                         if (preserve_links && S_ISLNK(mode))
 795                                 linkname_len = strlen(F_SYMLINK(first)) + 1;
 796                         else
 797                                 linkname_len = 0;
 798                         goto create_object;
 799                 }
 800         }
 801 #endif
 802
 803         file_length = read_varlong30(f, 3);
 804         if (!(xflags & XMIT_SAME_TIME)) {
 805                 if (protocol_version >= 30) {
 806                         modtime = read_varlong(f, 4);
 807 #if SIZEOF_TIME_T < SIZEOF_INT64
 808                         if (!am_generator && (int64)(time_t)modtime != modtime) {
 809                                 rprintf(FERROR_XFER,
 810                                     "Time value of %s truncated on receiver.\n",
 811                                     lastname);
 812                         }
 813 #endif
 814                 } else
 815                         modtime = read_int(f);
 816         }
 817         if (xflags & XMIT_MOD_NSEC)
 818                 modtime_nsec = read_varint(f);
 819         else
 820                 modtime_nsec = 0;
 821         if (!(xflags & XMIT_SAME_MODE))
 822                 mode = from_wire_mode(read_int(f));
 823
 824         if (chmod_modes && !S_ISLNK(mode) && mode)
 825                 mode = tweak_mode(mode, chmod_modes);
 826
 827         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
 828                 if (protocol_version < 30)
 829                         uid = (uid_t)read_int(f);
 830                 else {
 831                         uid = (uid_t)read_varint(f);
 832                         if (xflags & XMIT_USER_NAME_FOLLOWS)
 833                                 uid = recv_user_name(f, uid);
 834                         else if (inc_recurse && am_root && (!numeric_ids || usermap))
 835                                 uid = match_uid(uid);
 836                 }
 837         }
 838         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
 839                 if (protocol_version < 30)
 840                         gid = (gid_t)read_int(f);
 841                 else {
 842                         gid = (gid_t)read_varint(f);
 843                         gid_flags = 0;
 844                         if (xflags & XMIT_GROUP_NAME_FOLLOWS)
 845                                 gid = recv_group_name(f, gid, &gid_flags);
 846                         else if (inc_recurse && (!am_root || !numeric_ids || groupmap))
 847                                 gid = match_gid(gid, &gid_flags);
 848                 }
 849         }
 850
 851         if ((preserve_devices && IS_DEVICE(mode))
 852          || (preserve_specials && IS_SPECIAL(mode) && protocol_version < 31)) {
 853                 if (protocol_version < 28) {
 854                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 855                                 rdev = (dev_t)read_int(f);
 856                 } else {
 857                         uint32 rdev_minor;
 858                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 859                                 rdev_major = read_varint30(f);
 860                         if (protocol_version >= 30)
 861                                 rdev_minor = read_varint(f);
 862                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 863                                 rdev_minor = read_byte(f);
 864                         else
 865                                 rdev_minor = read_int(f);
 866                         rdev = MAKEDEV(rdev_major, rdev_minor);
 867                 }
 868                 if (IS_DEVICE(mode))
 869                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 870                 file_length = 0;
 871         } else if (protocol_version < 28)
 872                 rdev = MAKEDEV(0, 0);
 873
 874 #ifdef SUPPORT_LINKS
 875         if (preserve_links && S_ISLNK(mode)) {
 876                 linkname_len = read_varint30(f) + 1; /* count the '\0' */
 877                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 878                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 879                                 linkname_len - 1);
 880                         overflow_exit("recv_file_entry");
 881                 }
 882 #ifdef ICONV_OPTION
 883                 /* We don't know how much extra room we need to convert
 884                  * the as-yet-unread symlink data, so let's hope that a
 885                  * double-size buffer is plenty. */
 886                 if (sender_symlink_iconv)
 887                         linkname_len *= 2;
 888 #endif
 889                 if (munge_symlinks)
 890                         linkname_len += SYMLINK_PREFIX_LEN;
 891         }
 892         else
 893 #endif
 894                 linkname_len = 0;
 895
 896 #ifdef SUPPORT_HARD_LINKS
 897   create_object:
 898         if (preserve_hard_links) {
 899                 if (protocol_version < 28 && S_ISREG(mode))
 900                         xflags |= XMIT_HLINKED;
 901                 if (xflags & XMIT_HLINKED)
 902                         extra_len += (inc_recurse+1) * EXTRA_LEN;
 903         }
 904 #endif
 905
 906 #ifdef SUPPORT_ACLS
 907         /* Directories need an extra int32 for the default ACL. */
 908         if (preserve_acls && S_ISDIR(mode))
 909                 extra_len += EXTRA_LEN;
 910 #endif
 911
 912         if (always_checksum && S_ISREG(mode))
 913                 extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
 914
 915 #if SIZEOF_INT64 >= 8
 916         if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
 917                 extra_len += EXTRA_LEN;
 918 #endif
 919 #ifdef HAVE_UTIMENSAT
 920         if (modtime_nsec)
 921                 extra_len += EXTRA_LEN;
 922 #endif
 923         if (file_length < 0) {
 924                 rprintf(FERROR, "Offset underflow: file-length is negative\n");
 925                 exit_cleanup(RERR_UNSUPPORTED);
 926         }
 927
 928         if (inc_recurse && S_ISDIR(mode)) {
 929                 if (one_file_system) {
 930                         /* Room to save the dir's device for -x */
 931                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 932                 }
 933                 pool = dir_flist->file_pool;
 934         } else
 935                 pool = flist->file_pool;
 936
 937 #if EXTRA_ROUNDING > 0
 938         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
 939                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
 940 #endif
 941
 942         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
 943                   + linkname_len;
 944         bp = pool_alloc(pool, alloc_len, "recv_file_entry");
 945
 946         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
 947         bp += extra_len;
 948         file = (struct file_struct *)bp;
 949         bp += FILE_STRUCT_LEN;
 950
 951         memcpy(bp, basename, basename_len);
 952
 953 #ifdef SUPPORT_HARD_LINKS
 954         if (xflags & XMIT_HLINKED)
 955                 file->flags |= FLAG_HLINKED;
 956 #endif
 957         file->modtime = (time_t)modtime;
 958 #ifdef HAVE_UTIMENSAT
 959         if (modtime_nsec) {
 960                 file->flags |= FLAG_MOD_NSEC;
 961                 OPT_EXTRA(file, 0)->unum = modtime_nsec;
 962         }
 963 #endif
 964         file->len32 = (uint32)file_length;
 965 #if SIZEOF_INT64 >= 8
 966         if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
 967 #if SIZEOF_CAPITAL_OFF_T < 8
 968                 rprintf(FERROR, "Offset overflow: attempted 64-bit file-length\n");
 969                 exit_cleanup(RERR_UNSUPPORTED);
 970 #else
 971                 file->flags |= FLAG_LENGTH64;
 972                 OPT_EXTRA(file, NSEC_BUMP(file))->unum = (uint32)(file_length >> 32);
 973 #endif
 974         }
 975 #endif
 976         file->mode = mode;
 977         if (preserve_uid)
 978                 F_OWNER(file) = uid;
 979         if (preserve_gid) {
 980                 F_GROUP(file) = gid;
 981                 file->flags |= gid_flags;
 982         }
 983         if (unsort_ndx)
 984                 F_NDX(file) = flist->used + flist->ndx_start;
 985
 986         if (basename != thisname) {
 987                 file->dirname = lastdir;
 988                 F_DEPTH(file) = lastdir_depth + 1;
 989         } else
 990                 F_DEPTH(file) = 1;
 991
 992         if (S_ISDIR(mode)) {
 993                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
 994                         F_DEPTH(file)--;
 995                 if (protocol_version >= 30) {
 996                         if (!(xflags & XMIT_NO_CONTENT_DIR)) {
 997                                 if (xflags & XMIT_TOP_DIR)
 998                                         file->flags |= FLAG_TOP_DIR;
 999                                 file->flags |= FLAG_CONTENT_DIR;
1000                         } else if (xflags & XMIT_TOP_DIR)
1001                                 file->flags |= FLAG_IMPLIED_DIR;
1002                 } else if (xflags & XMIT_TOP_DIR) {
1003                         in_del_hier = recurse;
1004                         del_hier_name_len = F_DEPTH(file) == 0 ? 0 : l1 + l2;
1005                         if (relative_paths && del_hier_name_len > 2
1006                             && lastname[del_hier_name_len-1] == '.'
1007                             && lastname[del_hier_name_len-2] == '/')
1008                                 del_hier_name_len -= 2;
1009                         file->flags |= FLAG_TOP_DIR | FLAG_CONTENT_DIR;
1010                 } else if (in_del_hier) {
1011                         if (!relative_paths || !del_hier_name_len
1012                          || (l1 >= del_hier_name_len
1013                           && lastname[del_hier_name_len] == '/'))
1014                                 file->flags |= FLAG_CONTENT_DIR;
1015                         else
1016                                 in_del_hier = 0;
1017                 }
1018         }
1019
1020         if (preserve_devices && IS_DEVICE(mode)) {
1021                 uint32 *devp = F_RDEV_P(file);
1022                 DEV_MAJOR(devp) = major(rdev);
1023                 DEV_MINOR(devp) = minor(rdev);
1024         }
1025
1026 #ifdef SUPPORT_LINKS
1027         if (linkname_len) {
1028                 bp += basename_len;
1029                 if (first_hlink_ndx >= flist->ndx_start) {
1030                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
1031                         memcpy(bp, F_SYMLINK(first), linkname_len);
1032                 } else {
1033                         if (munge_symlinks) {
1034                                 strlcpy(bp, SYMLINK_PREFIX, linkname_len);
1035                                 bp += SYMLINK_PREFIX_LEN;
1036                                 linkname_len -= SYMLINK_PREFIX_LEN;
1037                         }
1038 #ifdef ICONV_OPTION
1039                         if (sender_symlink_iconv) {
1040                                 xbuf outbuf, inbuf;
1041
1042                                 alloc_len = linkname_len;
1043                                 linkname_len /= 2;
1044
1045                                 /* Read the symlink data into the end of our double-sized
1046                                  * buffer and then convert it into the right spot. */
1047                                 INIT_XBUF(inbuf, bp + alloc_len - linkname_len,
1048                                           linkname_len - 1, (size_t)-1);
1049                                 read_sbuf(f, inbuf.buf, inbuf.len);
1050                                 INIT_XBUF(outbuf, bp, 0, alloc_len);
1051
1052                                 if (iconvbufs(ic_recv, &inbuf, &outbuf, 0) < 0) {
1053                                         io_error |= IOERR_GENERAL;
1054                                         rprintf(FERROR_XFER,
1055                                             "[%s] cannot convert symlink data for: %s (%s)\n",
1056                                             who_am_i(), full_fname(thisname), strerror(errno));
1057                                         bp = (char*)file->basename;
1058                                         *bp++ = '\0';
1059                                         outbuf.len = 0;
1060                                 }
1061                                 bp[outbuf.len] = '\0';
1062                         } else
1063 #endif
1064                                 read_sbuf(f, bp, linkname_len - 1);
1065                         if (sanitize_paths && !munge_symlinks && *bp)
1066                                 sanitize_path(bp, bp, "", lastdir_depth, SP_DEFAULT);
1067                 }
1068         }
1069 #endif
1070
1071 #ifdef SUPPORT_HARD_LINKS
1072         if (preserve_hard_links && xflags & XMIT_HLINKED) {
1073                 if (protocol_version >= 30) {
1074                         if (xflags & XMIT_HLINK_FIRST) {
1075                                 F_HL_GNUM(file) = flist->ndx_start + flist->used;
1076                         } else
1077                                 F_HL_GNUM(file) = first_hlink_ndx;
1078                 } else {
1079                         static int32 cnt = 0;
1080                         struct ht_int64_node *np;
1081                         int64 ino;
1082                         int32 ndx;
1083                         if (protocol_version < 26) {
1084                                 dev = read_int(f);
1085                                 ino = read_int(f);
1086                         } else {
1087                                 if (!(xflags & XMIT_SAME_DEV_pre30))
1088                                         dev = read_longint(f);
1089                                 ino = read_longint(f);
1090                         }
1091                         np = idev_find(dev, ino);
1092                         ndx = (int32)(long)np->data - 1;
1093                         if (ndx < 0) {
1094                                 ndx = cnt++;
1095                                 np->data = (void*)(long)cnt;
1096                         }
1097                         F_HL_GNUM(file) = ndx;
1098                 }
1099         }
1100 #endif
1101
1102         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
1103                 if (S_ISREG(mode))
1104                         bp = F_SUM(file);
1105                 else {
1106                         /* Prior to 28, we get a useless set of nulls. */
1107                         bp = tmp_sum;
1108                 }
1109                 if (first_hlink_ndx >= flist->ndx_start) {
1110                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
1111                         memcpy(bp, F_SUM(first), checksum_len);
1112                 } else
1113                         read_buf(f, bp, checksum_len);
1114         }
1115
1116 #ifdef SUPPORT_ACLS
1117         if (preserve_acls && !S_ISLNK(mode))
1118                 receive_acl(f, file);
1119 #endif
1120 #ifdef SUPPORT_XATTRS
1121         if (preserve_xattrs)
1122                 receive_xattr(f, file);
1123 #endif
1124
1125         if (S_ISREG(mode) || S_ISLNK(mode))
1126                 stats.total_size += file_length;
1127
1128         return file;
1129 }
1130
1131 /* Create a file_struct for a named file by reading its stat() information
1132  * and performing extensive checks against global options.
1133  *
1134  * Returns a pointer to the new file struct, or NULL if there was an error
1135  * or this file should be excluded.
1136  *
1137  * Note: Any error (here or in send_file_name) that results in the omission of
1138  * an existent source file from the file list should set
1139  * "io_error |= IOERR_GENERAL" to avoid deletion of the file from the
1140  * destination if --delete is on. */
1141 struct file_struct *make_file(const char *fname, struct file_list *flist,
1142                               STRUCT_STAT *stp, int flags, int filter_level)
1143 {
1144         static char *lastdir;
1145         static int lastdir_len = -1;
1146         struct file_struct *file;
1147         char thisname[MAXPATHLEN];
1148         char linkname[MAXPATHLEN];
1149         int alloc_len, basename_len, linkname_len;
1150         int extra_len = file_extra_cnt * EXTRA_LEN;
1151         const char *basename;
1152         alloc_pool_t *pool;
1153         STRUCT_STAT st;
1154         char *bp;
1155
1156         if (strlcpy(thisname, fname, sizeof thisname) >= sizeof thisname) {
1157                 io_error |= IOERR_GENERAL;
1158                 rprintf(FERROR_XFER, "skipping overly long name: %s\n", fname);
1159                 return NULL;
1160         }
1161         clean_fname(thisname, 0);
1162         if (sanitize_paths)
1163                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
1164
1165         if (stp && (S_ISDIR(stp->st_mode) || stp->st_mode == 0)) {
1166                 /* This is needed to handle a "symlink/." with a --relative
1167                  * dir, or a request to delete a specific file. */
1168                 st = *stp;
1169                 *linkname = '\0'; /* make IBM code checker happy */
1170         } else if (readlink_stat(thisname, &st, linkname) != 0) {
1171                 int save_errno = errno;
1172                 /* See if file is excluded before reporting an error. */
1173                 if (filter_level != NO_FILTERS
1174                  && (is_excluded(thisname, 0, filter_level)
1175                   || is_excluded(thisname, 1, filter_level))) {
1176                         if (ignore_perishable && save_errno != ENOENT)
1177                                 non_perishable_cnt++;
1178                         return NULL;
1179                 }
1180                 if (save_errno == ENOENT) {
1181 #ifdef SUPPORT_LINKS
1182                         /* When our options tell us to follow a symlink that
1183                          * points nowhere, tell the user about the symlink
1184                          * instead of giving a "vanished" message.  We only
1185                          * dereference a symlink if one of the --copy*links
1186                          * options was specified, so there's no need for the
1187                          * extra lstat() if one of these options isn't on. */
1188                         if ((copy_links || copy_unsafe_links || copy_dirlinks)
1189                          && x_lstat(thisname, &st, NULL) == 0
1190                          && S_ISLNK(st.st_mode)) {
1191                                 io_error |= IOERR_GENERAL;
1192                                 rprintf(FERROR_XFER, "symlink has no referent: %s\n",
1193                                         full_fname(thisname));
1194                         } else
1195 #endif
1196                         {
1197                                 enum logcode c = am_daemon && protocol_version < 28
1198                                                ? FERROR : FWARNING;
1199                                 io_error |= IOERR_VANISHED;
1200                                 rprintf(c, "file has vanished: %s\n",
1201                                         full_fname(thisname));
1202                         }
1203                 } else {
1204                         io_error |= IOERR_GENERAL;
1205                         rsyserr(FERROR_XFER, save_errno, "readlink_stat(%s) failed",
1206                                 full_fname(thisname));
1207                 }
1208                 return NULL;
1209         } else if (st.st_mode == 0) {
1210                 io_error |= IOERR_GENERAL;
1211                 rprintf(FINFO, "skipping file with bogus (zero) st_mode: %s\n",
1212                         full_fname(thisname));
1213                 return NULL;
1214         }
1215
1216         if (filter_level == NO_FILTERS)
1217                 goto skip_filters;
1218
1219         if (S_ISDIR(st.st_mode)) {
1220                 if (!xfer_dirs) {
1221                         rprintf(FINFO, "skipping directory %s\n", thisname);
1222                         return NULL;
1223                 }
1224                 /* -x only affects dirs because we need to avoid recursing
1225                  * into a mount-point directory, not to avoid copying a
1226                  * symlinked file if -L (or similar) was specified. */
1227                 if (one_file_system && st.st_dev != filesystem_dev
1228                  && BITS_SETnUNSET(flags, FLAG_CONTENT_DIR, FLAG_TOP_DIR)) {
1229                         if (one_file_system > 1) {
1230                                 if (INFO_GTE(MOUNT, 1)) {
1231                                         rprintf(FINFO,
1232                                             "[%s] skipping mount-point dir %s\n",
1233                                             who_am_i(), thisname);
1234                                 }
1235                                 return NULL;
1236                         }
1237                         flags |= FLAG_MOUNT_DIR;
1238                         flags &= ~FLAG_CONTENT_DIR;
1239                 }
1240         } else
1241                 flags &= ~FLAG_CONTENT_DIR;
1242
1243         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level)) {
1244                 if (ignore_perishable)
1245                         non_perishable_cnt++;
1246                 return NULL;
1247         }
1248
1249         if (lp_ignore_nonreadable(module_id)) {
1250 #ifdef SUPPORT_LINKS
1251                 if (!S_ISLNK(st.st_mode))
1252 #endif
1253                         if (access(thisname, R_OK) != 0)
1254                                 return NULL;
1255         }
1256
1257   skip_filters:
1258
1259         /* Only divert a directory in the main transfer. */
1260         if (flist) {
1261                 if (flist->prev && S_ISDIR(st.st_mode)
1262                  && flags & FLAG_DIVERT_DIRS) {
1263                         /* Room for parent/sibling/next-child info. */
1264                         extra_len += DIRNODE_EXTRA_CNT * EXTRA_LEN;
1265                         if (relative_paths)
1266                                 extra_len += PTR_EXTRA_CNT * EXTRA_LEN;
1267                         pool = dir_flist->file_pool;
1268                 } else
1269                         pool = flist->file_pool;
1270         } else {
1271 #ifdef SUPPORT_ACLS
1272                 /* Directories need an extra int32 for the default ACL. */
1273                 if (preserve_acls && S_ISDIR(st.st_mode))
1274                         extra_len += EXTRA_LEN;
1275 #endif
1276                 pool = NULL;
1277         }
1278
1279         if (DEBUG_GTE(FLIST, 2)) {
1280                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
1281                         who_am_i(), thisname, filter_level);
1282         }
1283
1284         if ((basename = strrchr(thisname, '/')) != NULL) {
1285                 int len = basename++ - thisname;
1286                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
1287                         lastdir = new_array(char, len + 1);
1288                         memcpy(lastdir, thisname, len);
1289                         lastdir[len] = '\0';
1290                         lastdir_len = len;
1291                 }
1292         } else
1293                 basename = thisname;
1294         basename_len = strlen(basename) + 1; /* count the '\0' */
1295
1296 #ifdef SUPPORT_LINKS
1297         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
1298 #else
1299         linkname_len = 0;
1300 #endif
1301
1302 #ifdef ST_MTIME_NSEC
1303         if (st.ST_MTIME_NSEC && protocol_version >= 31)
1304                 extra_len += EXTRA_LEN;
1305 #endif
1306 #if SIZEOF_CAPITAL_OFF_T >= 8
1307         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
1308                 extra_len += EXTRA_LEN;
1309 #endif
1310
1311         if (always_checksum && am_sender && S_ISREG(st.st_mode)) {
1312                 file_checksum(thisname, tmp_sum, st.st_size);
1313                 if (sender_keeps_checksum)
1314                         extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
1315         }
1316
1317 #if EXTRA_ROUNDING > 0
1318         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
1319                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
1320 #endif
1321
1322         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
1323                   + linkname_len;
1324         if (pool)
1325                 bp = pool_alloc(pool, alloc_len, "make_file");
1326         else {
1327                 if (!(bp = new_array(char, alloc_len)))
1328                         out_of_memory("make_file");
1329         }
1330
1331         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
1332         bp += extra_len;
1333         file = (struct file_struct *)bp;
1334         bp += FILE_STRUCT_LEN;
1335
1336         memcpy(bp, basename, basename_len);
1337
1338 #ifdef SUPPORT_HARD_LINKS
1339         if (preserve_hard_links && flist && flist->prev) {
1340                 if (protocol_version >= 28
1341                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
1342                  : S_ISREG(st.st_mode)) {
1343                         tmp_dev = (int64)st.st_dev + 1;
1344                         tmp_ino = (int64)st.st_ino;
1345                 } else
1346                         tmp_dev = 0;
1347         }
1348 #endif
1349
1350 #ifdef HAVE_STRUCT_STAT_ST_RDEV
1351         if (IS_DEVICE(st.st_mode)) {
1352                 tmp_rdev = st.st_rdev;
1353                 st.st_size = 0;
1354         } else if (IS_SPECIAL(st.st_mode))
1355                 st.st_size = 0;
1356 #endif
1357
1358         file->flags = flags;
1359         file->modtime = st.st_mtime;
1360 #ifdef ST_MTIME_NSEC
1361         if (st.ST_MTIME_NSEC && protocol_version >= 31) {
1362                 file->flags |= FLAG_MOD_NSEC;
1363                 OPT_EXTRA(file, 0)->unum = st.ST_MTIME_NSEC;
1364         }
1365 #endif
1366         file->len32 = (uint32)st.st_size;
1367 #if SIZEOF_CAPITAL_OFF_T >= 8
1368         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
1369                 file->flags |= FLAG_LENGTH64;
1370                 OPT_EXTRA(file, NSEC_BUMP(file))->unum = (uint32)(st.st_size >> 32);
1371         }
1372 #endif
1373         file->mode = st.st_mode;
1374         if (uid_ndx) /* Check uid_ndx instead of preserve_uid for del support */
1375                 F_OWNER(file) = st.st_uid;
1376         if (gid_ndx) /* Check gid_ndx instead of preserve_gid for del support */
1377                 F_GROUP(file) = st.st_gid;
1378
1379         if (basename != thisname)
1380                 file->dirname = lastdir;
1381
1382 #ifdef SUPPORT_LINKS
1383         if (linkname_len)
1384                 memcpy(bp + basename_len, linkname, linkname_len);
1385 #endif
1386
1387         if (am_sender)
1388                 F_PATHNAME(file) = pathname;
1389         else if (!pool)
1390                 F_DEPTH(file) = extra_len / EXTRA_LEN;
1391
1392         if (basename_len == 0+1) {
1393                 if (!pool)
1394                         unmake_file(file);
1395                 return NULL;
1396         }
1397
1398         if (sender_keeps_checksum && S_ISREG(st.st_mode))
1399                 memcpy(F_SUM(file), tmp_sum, checksum_len);
1400
1401         if (unsort_ndx)
1402                 F_NDX(file) = stats.num_dirs;
1403
1404         return file;
1405 }
1406
1407 /* Only called for temporary file_struct entries created by make_file(). */
1408 void unmake_file(struct file_struct *file)
1409 {
1410         free(REQ_EXTRA(file, F_DEPTH(file)));
1411 }
1412
1413 static struct file_struct *send_file_name(int f, struct file_list *flist,
1414                                           const char *fname, STRUCT_STAT *stp,
1415                                           int flags, int filter_level)
1416 {
1417         struct file_struct *file;
1418
1419         file = make_file(fname, flist, stp, flags, filter_level);
1420         if (!file)
1421                 return NULL;
1422
1423         if (chmod_modes && !S_ISLNK(file->mode) && file->mode)
1424                 file->mode = tweak_mode(file->mode, chmod_modes);
1425
1426         if (f >= 0) {
1427                 char fbuf[MAXPATHLEN];
1428 #ifdef SUPPORT_LINKS
1429                 const char *symlink_name;
1430                 int symlink_len;
1431 #ifdef ICONV_OPTION
1432                 char symlink_buf[MAXPATHLEN];
1433 #endif
1434 #endif
1435 #if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
1436                 stat_x sx;
1437                 init_stat_x(&sx);
1438 #endif
1439
1440 #ifdef SUPPORT_LINKS
1441                 if (preserve_links && S_ISLNK(file->mode)) {
1442                         symlink_name = F_SYMLINK(file);
1443                         symlink_len = strlen(symlink_name);
1444                         if (symlink_len == 0) {
1445                                 io_error |= IOERR_GENERAL;
1446                                 f_name(file, fbuf);
1447                                 rprintf(FERROR_XFER,
1448                                     "skipping symlink with 0-length value: %s\n",
1449                                     full_fname(fbuf));
1450                                 return NULL;
1451                         }
1452                 } else {
1453                         symlink_name = NULL;
1454                         symlink_len = 0;
1455                 }
1456 #endif
1457
1458 #ifdef ICONV_OPTION
1459                 if (ic_send != (iconv_t)-1) {
1460                         xbuf outbuf, inbuf;
1461
1462                         INIT_CONST_XBUF(outbuf, fbuf);
1463
1464                         if (file->dirname) {
1465                                 INIT_XBUF_STRLEN(inbuf, (char*)file->dirname);
1466                                 outbuf.size -= 2; /* Reserve room for '/' & 1 more char. */
1467                                 if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0)
1468                                         goto convert_error;
1469                                 outbuf.size += 2;
1470                                 fbuf[outbuf.len++] = '/';
1471                         }
1472
1473                         INIT_XBUF_STRLEN(inbuf, (char*)file->basename);
1474                         if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0) {
1475                           convert_error:
1476                                 io_error |= IOERR_GENERAL;
1477                                 rprintf(FERROR_XFER,
1478                                     "[%s] cannot convert filename: %s (%s)\n",
1479                                     who_am_i(), f_name(file, fbuf), strerror(errno));
1480                                 return NULL;
1481                         }
1482                         fbuf[outbuf.len] = '\0';
1483
1484 #ifdef SUPPORT_LINKS
1485                         if (symlink_len && sender_symlink_iconv) {
1486                                 INIT_XBUF(inbuf, (char*)symlink_name, symlink_len, (size_t)-1);
1487                                 INIT_CONST_XBUF(outbuf, symlink_buf);
1488                                 if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0) {
1489                                         io_error |= IOERR_GENERAL;
1490                                         f_name(file, fbuf);
1491                                         rprintf(FERROR_XFER,
1492                                             "[%s] cannot convert symlink data for: %s (%s)\n",
1493                                             who_am_i(), full_fname(fbuf), strerror(errno));
1494                                         return NULL;
1495                                 }
1496                                 symlink_buf[outbuf.len] = '\0';
1497
1498                                 symlink_name = symlink_buf;
1499                                 symlink_len = outbuf.len;
1500                         }
1501 #endif
1502                 } else
1503 #endif
1504                         f_name(file, fbuf);
1505
1506 #ifdef SUPPORT_ACLS
1507                 if (preserve_acls && !S_ISLNK(file->mode)) {
1508                         sx.st.st_mode = file->mode;
1509                         if (get_acl(fname, &sx) < 0) {
1510                                 io_error |= IOERR_GENERAL;
1511                                 return NULL;
1512                         }
1513                 }
1514 #endif
1515 #ifdef SUPPORT_XATTRS
1516                 if (preserve_xattrs) {
1517                         sx.st.st_mode = file->mode;
1518                         if (get_xattr(fname, &sx) < 0) {
1519                                 io_error |= IOERR_GENERAL;
1520                                 return NULL;
1521                         }
1522                 }
1523 #endif
1524
1525                 send_file_entry(f, fbuf, file,
1526 #ifdef SUPPORT_LINKS
1527                                 symlink_name, symlink_len,
1528 #endif
1529                                 flist->used, flist->ndx_start);
1530
1531 #ifdef SUPPORT_ACLS
1532                 if (preserve_acls && !S_ISLNK(file->mode)) {
1533                         send_acl(f, &sx);
1534                         free_acl(&sx);
1535                 }
1536 #endif
1537 #ifdef SUPPORT_XATTRS
1538                 if (preserve_xattrs) {
1539                         F_XATTR(file) = send_xattr(f, &sx);
1540                         free_xattr(&sx);
1541                 }
1542 #endif
1543         }
1544
1545         maybe_emit_filelist_progress(flist->used + flist_count_offset);
1546
1547         flist_expand(flist, 1);
1548         flist->files[flist->used++] = file;
1549
1550         return file;
1551 }
1552
1553 static void send_if_directory(int f, struct file_list *flist,
1554                               struct file_struct *file,
1555                               char *fbuf, unsigned int ol,
1556                               int flags)
1557 {
1558         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1559
1560         if (S_ISDIR(file->mode)
1561             && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) {
1562                 void *save_filters;
1563                 unsigned int len = strlen(fbuf);
1564                 if (len > 1 && fbuf[len-1] == '/')
1565                         fbuf[--len] = '\0';
1566                 if (len >= MAXPATHLEN - 1) {
1567                         io_error |= IOERR_GENERAL;
1568                         rprintf(FERROR_XFER, "skipping long-named directory: %s\n",
1569                                 full_fname(fbuf));
1570                         return;
1571                 }
1572                 save_filters = push_local_filters(fbuf, len);
1573                 send_directory(f, flist, fbuf, len, flags);
1574                 pop_local_filters(save_filters);
1575                 fbuf[ol] = '\0';
1576                 if (is_dot_dir)
1577                         fbuf[ol-1] = '.';
1578         }
1579 }
1580
1581 static int file_compare(const void *file1, const void *file2)
1582 {
1583         return f_name_cmp(*(struct file_struct **)file1,
1584                           *(struct file_struct **)file2);
1585 }
1586
1587 /* The guts of a merge-sort algorithm.  This was derived from the glibc
1588  * version, but I (Wayne) changed the merge code to do less copying and
1589  * to require only half the amount of temporary memory. */
1590 static void fsort_tmp(struct file_struct **fp, size_t num,
1591                       struct file_struct **tmp)
1592 {
1593         struct file_struct **f1, **f2, **t;
1594         size_t n1, n2;
1595
1596         n1 = num / 2;
1597         n2 = num - n1;
1598         f1 = fp;
1599         f2 = fp + n1;
1600
1601         if (n1 > 1)
1602                 fsort_tmp(f1, n1, tmp);
1603         if (n2 > 1)
1604                 fsort_tmp(f2, n2, tmp);
1605
1606         while (f_name_cmp(*f1, *f2) <= 0) {
1607                 if (!--n1)
1608                         return;
1609                 f1++;
1610         }
1611
1612         t = tmp;
1613         memcpy(t, f1, n1 * PTR_SIZE);
1614
1615         *f1++ = *f2++, n2--;
1616
1617         while (n1 > 0 && n2 > 0) {
1618                 if (f_name_cmp(*t, *f2) <= 0)
1619                         *f1++ = *t++, n1--;
1620                 else
1621                         *f1++ = *f2++, n2--;
1622         }
1623
1624         if (n1 > 0)
1625                 memcpy(f1, t, n1 * PTR_SIZE);
1626 }
1627
1628 /* This file-struct sorting routine makes sure that any identical names in
1629  * the file list stay in the same order as they were in the original list.
1630  * This is particularly vital in inc_recurse mode where we expect a sort
1631  * on the flist to match the exact order of a sort on the dir_flist. */
1632 static void fsort(struct file_struct **fp, size_t num)
1633 {
1634         if (num <= 1)
1635                 return;
1636
1637         if (use_qsort)
1638                 qsort(fp, num, PTR_SIZE, file_compare);
1639         else {
1640                 struct file_struct **tmp = new_array(struct file_struct *,
1641                                                      (num+1) / 2);
1642                 fsort_tmp(fp, num, tmp);
1643                 free(tmp);
1644         }
1645 }
1646
1647 /* We take an entire set of sibling dirs from the sorted flist and link them
1648  * into the tree, setting the appropriate parent/child/sibling pointers. */
1649 static void add_dirs_to_tree(int parent_ndx, struct file_list *from_flist,
1650                              int dir_cnt)
1651 {
1652         int i;
1653         int32 *dp = NULL;
1654         int32 *parent_dp = parent_ndx < 0 ? NULL
1655                          : F_DIR_NODE_P(dir_flist->sorted[parent_ndx]);
1656
1657         flist_expand(dir_flist, dir_cnt);
1658         dir_flist->sorted = dir_flist->files;
1659
1660         for (i = 0; dir_cnt; i++) {
1661                 struct file_struct *file = from_flist->sorted[i];
1662
1663                 if (!S_ISDIR(file->mode))
1664                         continue;
1665
1666                 dir_flist->files[dir_flist->used++] = file;
1667                 dir_cnt--;
1668
1669                 if (file->basename[0] == '.' && file->basename[1] == '\0')
1670                         continue;
1671
1672                 if (dp)
1673                         DIR_NEXT_SIBLING(dp) = dir_flist->used - 1;
1674                 else if (parent_dp)
1675                         DIR_FIRST_CHILD(parent_dp) = dir_flist->used - 1;
1676                 else
1677                         send_dir_ndx = dir_flist->used - 1;
1678
1679                 dp = F_DIR_NODE_P(file);
1680                 DIR_PARENT(dp) = parent_ndx;
1681                 DIR_FIRST_CHILD(dp) = -1;
1682         }
1683         if (dp)
1684                 DIR_NEXT_SIBLING(dp) = -1;
1685 }
1686
1687 static void interpret_stat_error(const char *fname, int is_dir)
1688 {
1689         if (errno == ENOENT) {
1690                 io_error |= IOERR_VANISHED;
1691                 rprintf(FWARNING, "%s has vanished: %s\n",
1692                         is_dir ? "directory" : "file", full_fname(fname));
1693         } else {
1694                 io_error |= IOERR_GENERAL;
1695                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1696                         full_fname(fname));
1697         }
1698 }
1699
1700 /* This function is normally called by the sender, but the receiving side also
1701  * calls it from get_dirlist() with f set to -1 so that we just construct the
1702  * file list in memory without sending it over the wire.  Also, get_dirlist()
1703  * might call this with f set to -2, which also indicates that local filter
1704  * rules should be ignored. */
1705 static void send_directory(int f, struct file_list *flist, char *fbuf, int len,
1706                            int flags)
1707 {
1708         struct dirent *di;
1709         unsigned remainder;
1710         char *p;
1711         DIR *d;
1712         int divert_dirs = (flags & FLAG_DIVERT_DIRS) != 0;
1713         int start = flist->used;
1714         int filter_level = f == -2 ? SERVER_FILTERS : ALL_FILTERS;
1715
1716         assert(flist != NULL);
1717
1718         if (!(d = opendir(fbuf))) {
1719                 if (errno == ENOENT) {
1720                         if (am_sender) /* Can abuse this for vanished error w/ENOENT: */
1721                                 interpret_stat_error(fbuf, True);
1722                         return;
1723                 }
1724                 io_error |= IOERR_GENERAL;
1725                 rsyserr(FERROR_XFER, errno, "opendir %s failed", full_fname(fbuf));
1726                 return;
1727         }
1728
1729         p = fbuf + len;
1730         if (len != 1 || *fbuf != '/')
1731                 *p++ = '/';
1732         *p = '\0';
1733         remainder = MAXPATHLEN - (p - fbuf);
1734
1735         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1736                 char *dname = d_name(di);
1737                 if (dname[0] == '.' && (dname[1] == '\0'
1738                     || (dname[1] == '.' && dname[2] == '\0')))
1739                         continue;
1740                 if (strlcpy(p, dname, remainder) >= remainder) {
1741                         io_error |= IOERR_GENERAL;
1742                         rprintf(FERROR_XFER,
1743                                 "cannot send long-named file %s\n",
1744                                 full_fname(fbuf));
1745                         continue;
1746                 }
1747                 if (dname[0] == '\0') {
1748                         io_error |= IOERR_GENERAL;
1749                         rprintf(FERROR_XFER,
1750                                 "cannot send file with empty name in %s\n",
1751                                 full_fname(fbuf));
1752                         continue;
1753                 }
1754
1755                 send_file_name(f, flist, fbuf, NULL, flags, filter_level);
1756         }
1757
1758         fbuf[len] = '\0';
1759
1760         if (errno) {
1761                 io_error |= IOERR_GENERAL;
1762                 rsyserr(FERROR_XFER, errno, "readdir(%s)", full_fname(fbuf));
1763         }
1764
1765         closedir(d);
1766
1767         if (f >= 0 && recurse && !divert_dirs) {
1768                 int i, end = flist->used - 1;
1769                 /* send_if_directory() bumps flist->used, so use "end". */
1770                 for (i = start; i <= end; i++)
1771                         send_if_directory(f, flist, flist->files[i], fbuf, len, flags);
1772         }
1773 }
1774
1775 static void send_implied_dirs(int f, struct file_list *flist, char *fname,
1776                               char *start, char *limit, int flags, char name_type)
1777 {
1778         static char lastpath[MAXPATHLEN] = "";
1779         static int lastpath_len = 0;
1780         static struct file_struct *lastpath_struct = NULL;
1781         struct file_struct *file;
1782         item_list *relname_list;
1783         relnamecache **rnpp;
1784         int len, need_new_dir, depth = 0;
1785         filter_rule_list save_filter_list = filter_list;
1786
1787         flags = (flags | FLAG_IMPLIED_DIR) & ~(FLAG_TOP_DIR | FLAG_CONTENT_DIR);
1788         filter_list.head = filter_list.tail = NULL; /* Don't filter implied dirs. */
1789
1790         if (inc_recurse) {
1791                 if (lastpath_struct && F_PATHNAME(lastpath_struct) == pathname
1792                  && lastpath_len == limit - fname
1793                  && strncmp(lastpath, fname, lastpath_len) == 0)
1794                         need_new_dir = 0;
1795                 else
1796                         need_new_dir = 1;
1797         } else {
1798                 char *tp = fname, *lp = lastpath;
1799                 /* Skip any initial directories in our path that we
1800                  * have in common with lastpath. */
1801                 assert(start == fname);
1802                 for ( ; ; tp++, lp++) {
1803                         if (tp == limit) {
1804                                 if (*lp == '/' || *lp == '\0')
1805                                         goto done;
1806                                 break;
1807                         }
1808                         if (*lp != *tp)
1809                                 break;
1810                         if (*tp == '/') {
1811                                 start = tp;
1812                                 depth++;
1813                         }
1814                 }
1815                 need_new_dir = 1;
1816         }
1817
1818         if (need_new_dir) {
1819                 int save_copy_links = copy_links;
1820                 int save_xfer_dirs = xfer_dirs;
1821                 char *slash;
1822
1823                 copy_links = xfer_dirs = 1;
1824
1825                 *limit = '\0';
1826
1827                 for (slash = start; (slash = strchr(slash+1, '/')) != NULL; ) {
1828                         *slash = '\0';
1829                         file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1830                         depth++;
1831                         if (!inc_recurse && file && S_ISDIR(file->mode))
1832                                 change_local_filter_dir(fname, strlen(fname), depth);
1833                         *slash = '/';
1834                 }
1835
1836                 file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1837                 if (inc_recurse) {
1838                         if (file && !S_ISDIR(file->mode))
1839                                 file = NULL;
1840                         lastpath_struct = file;
1841                 } else if (file && S_ISDIR(file->mode))
1842                         change_local_filter_dir(fname, strlen(fname), ++depth);
1843
1844                 strlcpy(lastpath, fname, sizeof lastpath);
1845                 lastpath_len = limit - fname;
1846
1847                 *limit = '/';
1848
1849                 copy_links = save_copy_links;
1850                 xfer_dirs = save_xfer_dirs;
1851
1852                 if (!inc_recurse)
1853                         goto done;
1854         }
1855
1856         if (!lastpath_struct)
1857                 goto done; /* dir must have vanished */
1858
1859         len = strlen(limit+1);
1860         memcpy(&relname_list, F_DIR_RELNAMES_P(lastpath_struct), sizeof relname_list);
1861         if (!relname_list) {
1862                 if (!(relname_list = new0(item_list)))
1863                         out_of_memory("send_implied_dirs");
1864                 memcpy(F_DIR_RELNAMES_P(lastpath_struct), &relname_list, sizeof relname_list);
1865         }
1866         rnpp = EXPAND_ITEM_LIST(relname_list, relnamecache *, 32);
1867         if (!(*rnpp = (relnamecache*)new_array(char, sizeof (relnamecache) + len)))
1868                 out_of_memory("send_implied_dirs");
1869         (*rnpp)->name_type = name_type;
1870         strlcpy((*rnpp)->fname, limit+1, len + 1);
1871
1872 done:
1873         filter_list = save_filter_list;
1874 }
1875
1876 static void send1extra(int f, struct file_struct *file, struct file_list *flist)
1877 {
1878         char fbuf[MAXPATHLEN];
1879         item_list *relname_list;
1880         int len, dlen, flags = FLAG_DIVERT_DIRS | FLAG_CONTENT_DIR;
1881         size_t j;
1882
1883         f_name(file, fbuf);
1884         dlen = strlen(fbuf);
1885
1886         if (!change_pathname(file, NULL, 0))
1887                 exit_cleanup(RERR_FILESELECT);
1888
1889         change_local_filter_dir(fbuf, dlen, send_dir_depth);
1890
1891         if (file->flags & FLAG_CONTENT_DIR) {
1892                 if (one_file_system) {
1893                         STRUCT_STAT st;
1894                         if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1895                                 interpret_stat_error(fbuf, True);
1896                                 return;
1897                         }
1898                         filesystem_dev = st.st_dev;
1899                 }
1900                 send_directory(f, flist, fbuf, dlen, flags);
1901         }
1902
1903         if (!relative_paths)
1904                 return;
1905
1906         memcpy(&relname_list, F_DIR_RELNAMES_P(file), sizeof relname_list);
1907         if (!relname_list)
1908                 return;
1909
1910         for (j = 0; j < relname_list->count; j++) {
1911                 char *slash;
1912                 relnamecache *rnp = ((relnamecache**)relname_list->items)[j];
1913                 char name_type = rnp->name_type;
1914
1915                 fbuf[dlen] = '/';
1916                 len = strlcpy(fbuf + dlen + 1, rnp->fname, sizeof fbuf - dlen - 1);
1917                 free(rnp);
1918                 if (len >= (int)sizeof fbuf)
1919                         continue; /* Impossible... */
1920
1921                 slash = strchr(fbuf+dlen+1, '/');
1922                 if (slash) {
1923                         send_implied_dirs(f, flist, fbuf, fbuf+dlen+1, slash, flags, name_type);
1924                         continue;
1925                 }
1926
1927                 if (name_type != NORMAL_NAME) {
1928                         STRUCT_STAT st;
1929                         if (link_stat(fbuf, &st, 1) != 0) {
1930                                 interpret_stat_error(fbuf, True);
1931                                 continue;
1932                         }
1933                         send_file_name(f, flist, fbuf, &st, FLAG_TOP_DIR | flags, ALL_FILTERS);
1934                 } else
1935                         send_file_name(f, flist, fbuf, NULL, FLAG_TOP_DIR | flags, ALL_FILTERS);
1936         }
1937
1938         free(relname_list);
1939 }
1940
1941 void send_extra_file_list(int f, int at_least)
1942 {
1943         struct file_list *flist;
1944         int64 start_write;
1945         uint16 prev_flags;
1946         int save_io_error = io_error;
1947
1948         if (flist_eof)
1949                 return;
1950
1951         if (at_least < 0)
1952                 at_least = file_total - file_old_total + 1;
1953
1954         /* Keep sending data until we have the requested number of
1955          * files in the upcoming file-lists. */
1956         while (file_total - file_old_total < at_least) {
1957                 struct file_struct *file = dir_flist->sorted[send_dir_ndx];
1958                 int dir_ndx, dstart = stats.num_dirs;
1959                 const char *pathname = F_PATHNAME(file);
1960                 int32 *dp;
1961
1962                 flist = flist_new(0, "send_extra_file_list");
1963                 start_write = stats.total_written;
1964
1965                 if (unsort_ndx)
1966                         dir_ndx = F_NDX(file);
1967                 else
1968                         dir_ndx = send_dir_ndx;
1969                 write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
1970                 flist->parent_ndx = dir_ndx;
1971
1972                 send1extra(f, file, flist);
1973                 prev_flags = file->flags;
1974                 dp = F_DIR_NODE_P(file);
1975
1976                 /* If there are any duplicate directory names that follow, we
1977                  * send all the dirs together in one file-list.  The dir_flist
1978                  * tree links all the child subdirs onto the last dup dir. */
1979                 while ((dir_ndx = DIR_NEXT_SIBLING(dp)) >= 0
1980                     && dir_flist->sorted[dir_ndx]->flags & FLAG_DUPLICATE) {
1981                         send_dir_ndx = dir_ndx;
1982                         file = dir_flist->sorted[dir_ndx];
1983                         /* Try to avoid some duplicate scanning of identical dirs. */
1984                         if (F_PATHNAME(file) == pathname && prev_flags & FLAG_CONTENT_DIR)
1985                                 file->flags &= ~FLAG_CONTENT_DIR;
1986                         send1extra(f, file, flist);
1987                         prev_flags = file->flags;
1988                         dp = F_DIR_NODE_P(file);
1989                 }
1990
1991                 if (protocol_version < 31 || io_error == save_io_error || ignore_errors)
1992                         write_byte(f, 0);
1993                 else {
1994                         write_shortint(f, XMIT_EXTENDED_FLAGS|XMIT_IO_ERROR_ENDLIST);
1995                         write_varint(f, io_error);
1996                 }
1997
1998                 if (need_unsorted_flist) {
1999                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2000                                 out_of_memory("send_extra_file_list");
2001                         memcpy(flist->sorted, flist->files,
2002                                flist->used * sizeof (struct file_struct*));
2003                 } else
2004                         flist->sorted = flist->files;
2005
2006                 flist_sort_and_clean(flist, 0);
2007
2008                 add_dirs_to_tree(send_dir_ndx, flist, stats.num_dirs - dstart);
2009                 flist_done_allocating(flist);
2010
2011                 file_total += flist->used;
2012                 stats.flist_size += stats.total_written - start_write;
2013                 stats.num_files += flist->used;
2014                 if (DEBUG_GTE(FLIST, 3))
2015                         output_flist(flist);
2016
2017                 if (DIR_FIRST_CHILD(dp) >= 0) {
2018                         send_dir_ndx = DIR_FIRST_CHILD(dp);
2019                         send_dir_depth++;
2020                 } else {
2021                         while (DIR_NEXT_SIBLING(dp) < 0) {
2022                                 if ((send_dir_ndx = DIR_PARENT(dp)) < 0) {
2023                                         write_ndx(f, NDX_FLIST_EOF);
2024                                         flist_eof = 1;
2025                                         change_local_filter_dir(NULL, 0, 0);
2026                                         goto finish;
2027                                 }
2028                                 send_dir_depth--;
2029                                 file = dir_flist->sorted[send_dir_ndx];
2030                                 dp = F_DIR_NODE_P(file);
2031                         }
2032                         send_dir_ndx = DIR_NEXT_SIBLING(dp);
2033                 }
2034         }
2035
2036   finish:
2037         if (io_error != save_io_error && protocol_version == 30 && !ignore_errors)
2038                 send_msg_int(MSG_IO_ERROR, io_error);
2039 }
2040
2041 struct file_list *send_file_list(int f, int argc, char *argv[])
2042 {
2043         static const char *lastdir;
2044         static int lastdir_len = -1;
2045         int len, dirlen;
2046         STRUCT_STAT st;
2047         char *p, *dir;
2048         struct file_list *flist;
2049         struct timeval start_tv, end_tv;
2050         int64 start_write;
2051         int use_ff_fd = 0;
2052         int disable_buffering;
2053         int flags = recurse ? FLAG_CONTENT_DIR : 0;
2054         int reading_remotely = filesfrom_host != NULL;
2055         int rl_flags = (reading_remotely ? 0 : RL_DUMP_COMMENTS)
2056 #ifdef ICONV_OPTION
2057                      | (filesfrom_convert ? RL_CONVERT : 0)
2058 #endif
2059                      | (eol_nulls || reading_remotely ? RL_EOL_NULLS : 0);
2060         int implied_dot_dir = 0;
2061
2062         rprintf(FLOG, "building file list\n");
2063         if (show_filelist_p())
2064                 start_filelist_progress("building file list");
2065         else if (inc_recurse && INFO_GTE(FLIST, 1) && !am_server)
2066                 rprintf(FCLIENT, "sending incremental file list\n");
2067
2068         start_write = stats.total_written;
2069         gettimeofday(&start_tv, NULL);
2070
2071         if (relative_paths && protocol_version >= 30)
2072                 implied_dirs = 1; /* We send flagged implied dirs */
2073
2074 #ifdef SUPPORT_HARD_LINKS
2075         if (preserve_hard_links && protocol_version >= 30 && !cur_flist)
2076                 init_hard_links();
2077 #endif
2078
2079         flist = cur_flist = flist_new(0, "send_file_list");
2080         if (inc_recurse) {
2081                 dir_flist = flist_new(FLIST_TEMP, "send_file_list");
2082                 flags |= FLAG_DIVERT_DIRS;
2083         } else
2084                 dir_flist = cur_flist;
2085
2086         disable_buffering = io_start_buffering_out(f);
2087         if (filesfrom_fd >= 0) {
2088                 if (argv[0] && !change_dir(argv[0], CD_NORMAL)) {
2089                         rsyserr(FERROR_XFER, errno, "change_dir %s failed",
2090                                 full_fname(argv[0]));
2091                         exit_cleanup(RERR_FILESELECT);
2092                 }
2093                 use_ff_fd = 1;
2094         }
2095
2096         if (!orig_dir)
2097                 orig_dir = strdup(curr_dir);
2098
2099         while (1) {
2100                 char fbuf[MAXPATHLEN], *fn, name_type;
2101
2102                 if (use_ff_fd) {
2103                         if (read_line(filesfrom_fd, fbuf, sizeof fbuf, rl_flags) == 0)
2104                                 break;
2105                         sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
2106                 } else {
2107                         if (argc-- == 0)
2108                                 break;
2109                         strlcpy(fbuf, *argv++, MAXPATHLEN);
2110                         if (sanitize_paths)
2111                                 sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
2112                 }
2113
2114                 len = strlen(fbuf);
2115                 if (relative_paths) {
2116                         /* We clean up fbuf below. */
2117                         name_type = NORMAL_NAME;
2118                 } else if (!len || fbuf[len - 1] == '/') {
2119                         if (len == 2 && fbuf[0] == '.') {
2120                                 /* Turn "./" into just "." rather than "./." */
2121                                 fbuf[--len] = '\0';
2122                         } else {
2123                                 if (len + 1 >= MAXPATHLEN)
2124                                         overflow_exit("send_file_list");
2125                                 fbuf[len++] = '.';
2126                                 fbuf[len] = '\0';
2127                         }
2128                         name_type = DOTDIR_NAME;
2129                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
2130                     && (len == 2 || fbuf[len-3] == '/')) {
2131                         if (len + 2 >= MAXPATHLEN)
2132                                 overflow_exit("send_file_list");
2133                         fbuf[len++] = '/';
2134                         fbuf[len++] = '.';
2135                         fbuf[len] = '\0';
2136                         name_type = DOTDIR_NAME;
2137                 } else if (fbuf[len-1] == '.' && (len == 1 || fbuf[len-2] == '/'))
2138                         name_type = DOTDIR_NAME;
2139                 else
2140                         name_type = NORMAL_NAME;
2141
2142                 dir = NULL;
2143
2144                 if (!relative_paths) {
2145                         p = strrchr(fbuf, '/');
2146                         if (p) {
2147                                 *p = '\0';
2148                                 if (p == fbuf)
2149                                         dir = "/";
2150                                 else
2151                                         dir = fbuf;
2152                                 len -= p - fbuf + 1;
2153                                 fn = p + 1;
2154                         } else
2155                                 fn = fbuf;
2156                 } else {
2157                         if ((p = strstr(fbuf, "/./")) != NULL) {
2158                                 *p = '\0';
2159                                 if (p == fbuf)
2160                                         dir = "/";
2161                                 else {
2162                                         dir = fbuf;
2163                                         clean_fname(dir, 0);
2164                                 }
2165                                 fn = p + 3;
2166                                 while (*fn == '/')
2167                                         fn++;
2168                                 if (!*fn)
2169                                         *--fn = '\0'; /* ensure room for '.' */
2170                         } else
2171                                 fn = fbuf;
2172                         /* A leading ./ can be used in relative mode to affect
2173                          * the dest dir without its name being in the path. */
2174                         if (*fn == '.' && fn[1] == '/' && !implied_dot_dir) {
2175                                 send_file_name(f, flist, ".", NULL,
2176                                     (flags | FLAG_IMPLIED_DIR) & ~FLAG_CONTENT_DIR,
2177                                     ALL_FILTERS);
2178                                 implied_dot_dir = 1;
2179                         }
2180                         len = clean_fname(fn, CFN_KEEP_TRAILING_SLASH
2181                                             | CFN_DROP_TRAILING_DOT_DIR);
2182                         if (len == 1) {
2183                                 if (fn[0] == '/') {
2184                                         fn = "/.";
2185                                         len = 2;
2186                                         name_type = DOTDIR_NAME;
2187                                 } else if (fn[0] == '.')
2188                                         name_type = DOTDIR_NAME;
2189                         } else if (fn[len-1] == '/') {
2190                                 fn[--len] = '\0';
2191                                 if (len == 1 && *fn == '.')
2192                                         name_type = DOTDIR_NAME;
2193                                 else
2194                                         name_type = SLASH_ENDING_NAME;
2195                         }
2196                         /* Reject a ".." dir in the active part of the path. */
2197                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
2198                                 if ((p[2] == '/' || p[2] == '\0')
2199                                  && (p == fn || p[-1] == '/')) {
2200                                         rprintf(FERROR,
2201                                             "found \"..\" dir in relative path: %s\n",
2202                                             fn);
2203                                         exit_cleanup(RERR_SYNTAX);
2204                                 }
2205                         }
2206                 }
2207
2208                 if (!*fn) {
2209                         len = 1;
2210                         fn = ".";
2211                         name_type = DOTDIR_NAME;
2212                 }
2213
2214                 dirlen = dir ? strlen(dir) : 0;
2215                 if (dirlen != lastdir_len || memcmp(lastdir, dir, dirlen) != 0) {
2216                         if (!change_pathname(NULL, dir, -dirlen))
2217                                 continue;
2218                         lastdir = pathname;
2219                         lastdir_len = pathname_len;
2220                 } else if (!change_pathname(NULL, lastdir, lastdir_len))
2221                         continue;
2222
2223                 if (fn != fbuf)
2224                         memmove(fbuf, fn, len + 1);
2225
2226                 if (link_stat(fbuf, &st, copy_dirlinks || name_type != NORMAL_NAME) != 0
2227                  || (name_type != DOTDIR_NAME && is_daemon_excluded(fbuf, S_ISDIR(st.st_mode)))
2228                  || (relative_paths && path_is_daemon_excluded(fbuf, 1))) {
2229                         if (errno != ENOENT || missing_args == 0) {
2230                                 /* This is a transfer error, but inhibit deletion
2231                                  * only if we might be omitting an existing file. */
2232                                 if (errno != ENOENT)
2233                                         io_error |= IOERR_GENERAL;
2234                                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
2235                                         full_fname(fbuf));
2236                                 continue;
2237                         } else if (missing_args == 1) {
2238                                 /* Just ignore the arg. */
2239                                 continue;
2240                         } else /* (missing_args == 2) */ {
2241                                 /* Send the arg as a "missing" entry with
2242                                  * mode 0, which tells the generator to delete it. */
2243                                 memset(&st, 0, sizeof st);
2244                         }
2245                 }
2246
2247                 /* A dot-dir should not be excluded! */
2248                 if (name_type != DOTDIR_NAME && st.st_mode != 0
2249                  && is_excluded(fbuf, S_ISDIR(st.st_mode) != 0, ALL_FILTERS))
2250                         continue;
2251
2252                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
2253                         rprintf(FINFO, "skipping directory %s\n", fbuf);
2254                         continue;
2255                 }
2256
2257                 if (inc_recurse && relative_paths && *fbuf) {
2258                         if ((p = strchr(fbuf+1, '/')) != NULL) {
2259                                 if (p - fbuf == 1 && *fbuf == '.') {
2260                                         if ((fn = strchr(p+1, '/')) != NULL)
2261                                                 p = fn;
2262                                 } else
2263                                         fn = p;
2264                                 send_implied_dirs(f, flist, fbuf, fbuf, p, flags, name_type);
2265                                 if (fn == p)
2266                                         continue;
2267                         }
2268                 } else if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
2269                         /* Send the implied directories at the start of the
2270                          * source spec, so we get their permissions right. */
2271                         send_implied_dirs(f, flist, fbuf, fbuf, p, flags, 0);
2272                 }
2273
2274                 if (one_file_system)
2275                         filesystem_dev = st.st_dev;
2276
2277                 if (recurse || (xfer_dirs && name_type != NORMAL_NAME)) {
2278                         struct file_struct *file;
2279                         file = send_file_name(f, flist, fbuf, &st,
2280                                               FLAG_TOP_DIR | FLAG_CONTENT_DIR | flags,
2281                                               NO_FILTERS);
2282                         if (!file)
2283                                 continue;
2284                         if (inc_recurse) {
2285                                 if (name_type == DOTDIR_NAME) {
2286                                         if (send_dir_depth < 0) {
2287                                                 send_dir_depth = 0;
2288                                                 change_local_filter_dir(fbuf, len, send_dir_depth);
2289                                         }
2290                                         send_directory(f, flist, fbuf, len, flags);
2291                                 }
2292                         } else
2293                                 send_if_directory(f, flist, file, fbuf, len, flags);
2294                 } else
2295                         send_file_name(f, flist, fbuf, &st, flags, NO_FILTERS);
2296         }
2297
2298         gettimeofday(&end_tv, NULL);
2299         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2300                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2301         if (stats.flist_buildtime == 0)
2302                 stats.flist_buildtime = 1;
2303         start_tv = end_tv;
2304
2305         /* Indicate end of file list */
2306         if (protocol_version < 31 || io_error == 0 || ignore_errors)
2307                 write_byte(f, 0);
2308         else {
2309                 write_shortint(f, XMIT_EXTENDED_FLAGS|XMIT_IO_ERROR_ENDLIST);
2310                 write_varint(f, io_error);
2311         }
2312
2313 #ifdef SUPPORT_HARD_LINKS
2314         if (preserve_hard_links && protocol_version >= 30 && !inc_recurse)
2315                 idev_destroy();
2316 #endif
2317
2318         if (show_filelist_p())
2319                 finish_filelist_progress(flist);
2320
2321         gettimeofday(&end_tv, NULL);
2322         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2323                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2324
2325         /* When converting names, both sides keep an unsorted file-list array
2326          * because the names will differ on the sending and receiving sides
2327          * (both sides will use the unsorted index number for each item). */
2328
2329         /* Sort the list without removing any duplicates.  This allows the
2330          * receiving side to ask for whatever name it kept.  For incremental
2331          * recursion mode, the sender marks duplicate dirs so that it can
2332          * send them together in a single file-list. */
2333         if (need_unsorted_flist) {
2334                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2335                         out_of_memory("send_file_list");
2336                 memcpy(flist->sorted, flist->files,
2337                        flist->used * sizeof (struct file_struct*));
2338         } else
2339                 flist->sorted = flist->files;
2340         flist_sort_and_clean(flist, 0);
2341         file_total += flist->used;
2342
2343         if (numeric_ids <= 0 && !inc_recurse)
2344                 send_id_list(f);
2345
2346         set_msg_fd_in(-1);
2347
2348         /* send the io_error flag */
2349         if (protocol_version < 30)
2350                 write_int(f, ignore_errors ? 0 : io_error);
2351         else if (io_error && protocol_version == 30 && !ignore_errors)
2352                 send_msg_int(MSG_IO_ERROR, io_error);
2353
2354         if (disable_buffering)
2355                 io_end_buffering_out();
2356
2357         stats.flist_size = stats.total_written - start_write;
2358         stats.num_files = flist->used;
2359
2360         if (DEBUG_GTE(FLIST, 3))
2361                 output_flist(flist);
2362
2363         if (DEBUG_GTE(FLIST, 2))
2364                 rprintf(FINFO, "send_file_list done\n");
2365
2366         if (inc_recurse) {
2367                 send_dir_depth = 1;
2368                 add_dirs_to_tree(-1, flist, stats.num_dirs);
2369                 if (!file_total || strcmp(flist->sorted[flist->low]->basename, ".") != 0)
2370                         flist->parent_ndx = -1;
2371                 flist_done_allocating(flist);
2372                 if (send_dir_ndx < 0) {
2373                         write_ndx(f, NDX_FLIST_EOF);
2374                         flist_eof = 1;
2375                 }
2376                 else if (file_total == 1) {
2377                         /* If we're creating incremental file-lists and there
2378                          * was just 1 item in the first file-list, send 1 more
2379                          * file-list to check if this is a 1-file xfer. */
2380                         send_extra_file_list(f, 1);
2381                 }
2382         } else
2383                 flist_eof = 1;
2384
2385         return flist;
2386 }
2387
2388 struct file_list *recv_file_list(int f)
2389 {
2390         struct file_list *flist;
2391         int dstart, flags;
2392         int64 start_read;
2393
2394         if (!first_flist) {
2395                 if (show_filelist_p())
2396                         start_filelist_progress("receiving file list");
2397                 else if (inc_recurse && INFO_GTE(FLIST, 1) && !am_server)
2398                         rprintf(FCLIENT, "receiving incremental file list\n");
2399                 rprintf(FLOG, "receiving file list\n");
2400                 if (usermap)
2401                         parse_name_map(usermap, True);
2402                 if (groupmap)
2403                         parse_name_map(groupmap, False);
2404         }
2405
2406         start_read = stats.total_read;
2407
2408 #ifdef SUPPORT_HARD_LINKS
2409         if (preserve_hard_links && !first_flist)
2410                 init_hard_links();
2411 #endif
2412
2413         flist = flist_new(0, "recv_file_list");
2414
2415         if (inc_recurse) {
2416                 if (flist->ndx_start == 1)
2417                         dir_flist = flist_new(FLIST_TEMP, "recv_file_list");
2418                 dstart = dir_flist->used;
2419         } else {
2420                 dir_flist = flist;
2421                 dstart = 0;
2422         }
2423
2424         while ((flags = read_byte(f)) != 0) {
2425                 struct file_struct *file;
2426
2427                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
2428                         flags |= read_byte(f) << 8;
2429
2430                 if (flags == (XMIT_EXTENDED_FLAGS|XMIT_IO_ERROR_ENDLIST)) {
2431                         int err;
2432                         if (protocol_version < 31) {
2433                                 rprintf(FERROR, "Invalid flist flag: %x\n", flags);
2434                                 exit_cleanup(RERR_PROTOCOL);
2435                         }
2436                         err = read_varint(f);
2437                         if (!ignore_errors)
2438                                 io_error |= err;
2439                         break;
2440                 }
2441
2442                 flist_expand(flist, 1);
2443                 file = recv_file_entry(f, flist, flags);
2444
2445                 if (S_ISREG(file->mode)) {
2446                         /* Already counted */
2447                 } else if (S_ISDIR(file->mode)) {
2448                         if (inc_recurse) {
2449                                 flist_expand(dir_flist, 1);
2450                                 dir_flist->files[dir_flist->used++] = file;
2451                         }
2452                         stats.num_dirs++;
2453                 } else if (S_ISLNK(file->mode))
2454                         stats.num_symlinks++;
2455                 else if (IS_DEVICE(file->mode))
2456                         stats.num_symlinks++;
2457                 else
2458                         stats.num_specials++;
2459
2460                 flist->files[flist->used++] = file;
2461
2462                 maybe_emit_filelist_progress(flist->used);
2463
2464                 if (DEBUG_GTE(FLIST, 2)) {
2465                         char *name = f_name(file, NULL);
2466                         rprintf(FINFO, "recv_file_name(%s)\n", NS(name));
2467                 }
2468         }
2469         file_total += flist->used;
2470
2471         if (DEBUG_GTE(FLIST, 2))
2472                 rprintf(FINFO, "received %d names\n", flist->used);
2473
2474         if (show_filelist_p())
2475                 finish_filelist_progress(flist);
2476
2477         if (need_unsorted_flist) {
2478                 /* Create an extra array of index pointers that we can sort for
2479                  * the generator's use (for wading through the files in sorted
2480                  * order and for calling flist_find()).  We keep the "files"
2481                  * list unsorted for our exchange of index numbers with the
2482                  * other side (since their names may not sort the same). */
2483                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2484                         out_of_memory("recv_file_list");
2485                 memcpy(flist->sorted, flist->files,
2486                        flist->used * sizeof (struct file_struct*));
2487                 if (inc_recurse && dir_flist->used > dstart) {
2488                         static int dir_flist_malloced = 0;
2489                         if (dir_flist_malloced < dir_flist->malloced) {
2490                                 dir_flist->sorted = realloc_array(dir_flist->sorted,
2491                                                         struct file_struct *,
2492                                                         dir_flist->malloced);
2493                                 dir_flist_malloced = dir_flist->malloced;
2494                         }
2495                         memcpy(dir_flist->sorted + dstart, dir_flist->files + dstart,
2496                                (dir_flist->used - dstart) * sizeof (struct file_struct*));
2497                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2498                 }
2499         } else {
2500                 flist->sorted = flist->files;
2501                 if (inc_recurse && dir_flist->used > dstart) {
2502                         dir_flist->sorted = dir_flist->files;
2503                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2504                 }
2505         }
2506
2507         if (inc_recurse)
2508                 flist_done_allocating(flist);
2509         else if (f >= 0) {
2510                 recv_id_list(f, flist);
2511                 flist_eof = 1;
2512         }
2513
2514         flist_sort_and_clean(flist, relative_paths);
2515
2516         if (protocol_version < 30) {
2517                 /* Recv the io_error flag */
2518                 int err = read_int(f);
2519                 if (!ignore_errors)
2520                         io_error |= err;
2521         } else if (inc_recurse && flist->ndx_start == 1) {
2522                 if (!file_total || strcmp(flist->sorted[flist->low]->basename, ".") != 0)
2523                         flist->parent_ndx = -1;
2524         }
2525
2526         if (DEBUG_GTE(FLIST, 3))
2527                 output_flist(flist);
2528
2529         if (DEBUG_GTE(FLIST, 2))
2530                 rprintf(FINFO, "recv_file_list done\n");
2531
2532         stats.flist_size += stats.total_read - start_read;
2533         stats.num_files += flist->used;
2534
2535         return flist;
2536 }
2537
2538 /* This is only used once by the receiver if the very first file-list
2539  * has exactly one item in it. */
2540 void recv_additional_file_list(int f)
2541 {
2542         struct file_list *flist;
2543         int ndx = read_ndx(f);
2544         if (ndx == NDX_FLIST_EOF) {
2545                 flist_eof = 1;
2546                 change_local_filter_dir(NULL, 0, 0);
2547         } else {
2548                 ndx = NDX_FLIST_OFFSET - ndx;
2549                 if (ndx < 0 || ndx >= dir_flist->used) {
2550                         ndx = NDX_FLIST_OFFSET - ndx;
2551                         rprintf(FERROR,
2552                                 "[%s] Invalid dir index: %d (%d - %d)\n",
2553                                 who_am_i(), ndx, NDX_FLIST_OFFSET,
2554                                 NDX_FLIST_OFFSET - dir_flist->used + 1);
2555                         exit_cleanup(RERR_PROTOCOL);
2556                 }
2557                 if (DEBUG_GTE(FLIST, 3)) {
2558                         rprintf(FINFO, "[%s] receiving flist for dir %d\n",
2559                                 who_am_i(), ndx);
2560                 }
2561                 flist = recv_file_list(f);
2562                 flist->parent_ndx = ndx;
2563         }
2564 }
2565
2566 /* Search for an identically-named item in the file list.  Note that the
2567  * items must agree in their directory-ness, or no match is returned. */
2568 int flist_find(struct file_list *flist, struct file_struct *f)
2569 {
2570         int low = flist->low, high = flist->high;
2571         int diff, mid, mid_up;
2572
2573         while (low <= high) {
2574                 mid = (low + high) / 2;
2575                 if (F_IS_ACTIVE(flist->sorted[mid]))
2576                         mid_up = mid;
2577                 else {
2578                         /* Scan for the next non-empty entry using the cached
2579                          * distance values.  If the value isn't fully up-to-
2580                          * date, update it. */
2581                         mid_up = mid + F_DEPTH(flist->sorted[mid]);
2582                         if (!F_IS_ACTIVE(flist->sorted[mid_up])) {
2583                                 do {
2584                                     mid_up += F_DEPTH(flist->sorted[mid_up]);
2585                                 } while (!F_IS_ACTIVE(flist->sorted[mid_up]));
2586                                 F_DEPTH(flist->sorted[mid]) = mid_up - mid;
2587                         }
2588                         if (mid_up > high) {
2589                                 /* If there's nothing left above us, set high to
2590                                  * a non-empty entry below us and continue. */
2591                                 high = mid - (int)flist->sorted[mid]->len32;
2592                                 if (!F_IS_ACTIVE(flist->sorted[high])) {
2593                                         do {
2594                                             high -= (int)flist->sorted[high]->len32;
2595                                         } while (!F_IS_ACTIVE(flist->sorted[high]));
2596                                         flist->sorted[mid]->len32 = mid - high;
2597                                 }
2598                                 continue;
2599                         }
2600                 }
2601                 diff = f_name_cmp(flist->sorted[mid_up], f);
2602                 if (diff == 0) {
2603                         if (protocol_version < 29
2604                             && S_ISDIR(flist->sorted[mid_up]->mode)
2605                             != S_ISDIR(f->mode))
2606                                 return -1;
2607                         return mid_up;
2608                 }
2609                 if (diff < 0)
2610                         low = mid_up + 1;
2611                 else
2612                         high = mid - 1;
2613         }
2614         return -1;
2615 }
2616
2617 /* Search for an identically-named item in the file list.  Differs from
2618  * flist_find in that an item that agrees with "f" in directory-ness is
2619  * preferred but one that does not is still found. */
2620 int flist_find_ignore_dirness(struct file_list *flist, struct file_struct *f)
2621 {
2622         mode_t save_mode;
2623         int ndx;
2624
2625         /* First look for an item that agrees in directory-ness. */
2626         ndx = flist_find(flist, f);
2627         if (ndx >= 0)
2628                 return ndx;
2629
2630         /* Temporarily flip f->mode to look for an item of opposite
2631          * directory-ness. */
2632         save_mode = f->mode;
2633         f->mode = S_ISDIR(f->mode) ? S_IFREG : S_IFDIR;
2634         ndx = flist_find(flist, f);
2635         f->mode = save_mode;
2636         return ndx;
2637 }
2638
2639 /*
2640  * Free up any resources a file_struct has allocated
2641  * and clear the file.
2642  */
2643 void clear_file(struct file_struct *file)
2644 {
2645         /* The +1 zeros out the first char of the basename. */
2646         memset(file, 0, FILE_STRUCT_LEN + 1);
2647         /* In an empty entry, F_DEPTH() is an offset to the next non-empty
2648          * entry.  Likewise for len32 in the opposite direction.  We assume
2649          * that we're alone for now since flist_find() will adjust the counts
2650          * it runs into that aren't up-to-date. */
2651         file->len32 = F_DEPTH(file) = 1;
2652 }
2653
2654 /* Allocate a new file list. */
2655 struct file_list *flist_new(int flags, char *msg)
2656 {
2657         struct file_list *flist;
2658
2659         if (!(flist = new0(struct file_list)))
2660                 out_of_memory(msg);
2661
2662         if (flags & FLIST_TEMP) {
2663                 if (!(flist->file_pool = pool_create(SMALL_EXTENT, 0,
2664                                                      out_of_memory,
2665                                                      POOL_INTERN)))
2666                         out_of_memory(msg);
2667         } else {
2668                 /* This is a doubly linked list with prev looping back to
2669                  * the end of the list, but the last next pointer is NULL. */
2670                 if (!first_flist) {
2671                         flist->file_pool = pool_create(NORMAL_EXTENT, 0,
2672                                                        out_of_memory,
2673                                                        POOL_INTERN);
2674                         if (!flist->file_pool)
2675                                 out_of_memory(msg);
2676
2677                         flist->ndx_start = flist->flist_num = inc_recurse ? 1 : 0;
2678
2679                         first_flist = cur_flist = flist->prev = flist;
2680                 } else {
2681                         struct file_list *prev = first_flist->prev;
2682
2683                         flist->file_pool = first_flist->file_pool;
2684
2685                         flist->ndx_start = prev->ndx_start + prev->used + 1;
2686                         flist->flist_num = prev->flist_num + 1;
2687
2688                         flist->prev = prev;
2689                         prev->next = first_flist->prev = flist;
2690                 }
2691                 flist->pool_boundary = pool_boundary(flist->file_pool, 0);
2692                 flist_cnt++;
2693         }
2694
2695         return flist;
2696 }
2697
2698 /* Free up all elements in a flist. */
2699 void flist_free(struct file_list *flist)
2700 {
2701         if (!flist->prev) {
2702                 /* Was FLIST_TEMP dir-list. */
2703         } else if (flist == flist->prev) {
2704                 first_flist = cur_flist = NULL;
2705                 file_total = 0;
2706                 flist_cnt = 0;
2707         } else {
2708                 if (flist == cur_flist)
2709                         cur_flist = flist->next;
2710                 if (flist == first_flist)
2711                         first_flist = first_flist->next;
2712                 else {
2713                         flist->prev->next = flist->next;
2714                         if (!flist->next)
2715                                 flist->next = first_flist;
2716                 }
2717                 flist->next->prev = flist->prev;
2718                 file_total -= flist->used;
2719                 flist_cnt--;
2720         }
2721
2722         if (!flist->prev || !flist_cnt)
2723                 pool_destroy(flist->file_pool);
2724         else
2725                 pool_free_old(flist->file_pool, flist->pool_boundary);
2726
2727         if (flist->sorted && flist->sorted != flist->files)
2728                 free(flist->sorted);
2729         free(flist->files);
2730         free(flist);
2731 }
2732
2733 /* This routine ensures we don't have any duplicate names in our file list.
2734  * duplicate names can cause corruption because of the pipelining. */
2735 static void flist_sort_and_clean(struct file_list *flist, int strip_root)
2736 {
2737         char fbuf[MAXPATHLEN];
2738         int i, prev_i;
2739
2740         if (!flist)
2741                 return;
2742         if (flist->used == 0) {
2743                 flist->high = -1;
2744                 flist->low = 0;
2745                 return;
2746         }
2747
2748         fsort(flist->sorted, flist->used);
2749
2750         if (!am_sender || inc_recurse) {
2751                 for (i = prev_i = 0; i < flist->used; i++) {
2752                         if (F_IS_ACTIVE(flist->sorted[i])) {
2753                                 prev_i = i;
2754                                 break;
2755                         }
2756                 }
2757                 flist->low = prev_i;
2758         } else {
2759                 i = prev_i = flist->used - 1;
2760                 flist->low = 0;
2761         }
2762
2763         while (++i < flist->used) {
2764                 int j;
2765                 struct file_struct *file = flist->sorted[i];
2766
2767                 if (!F_IS_ACTIVE(file))
2768                         continue;
2769                 if (f_name_cmp(file, flist->sorted[prev_i]) == 0)
2770                         j = prev_i;
2771                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
2772                         int save_mode = file->mode;
2773                         /* Make sure that this directory doesn't duplicate a
2774                          * non-directory earlier in the list. */
2775                         flist->high = prev_i;
2776                         file->mode = S_IFREG;
2777                         j = flist_find(flist, file);
2778                         file->mode = save_mode;
2779                 } else
2780                         j = -1;
2781                 if (j >= 0) {
2782                         int keep, drop;
2783                         /* If one is a dir and the other is not, we want to
2784                          * keep the dir because it might have contents in the
2785                          * list.  Otherwise keep the first one. */
2786                         if (S_ISDIR(file->mode)) {
2787                                 struct file_struct *fp = flist->sorted[j];
2788                                 if (!S_ISDIR(fp->mode))
2789                                         keep = i, drop = j;
2790                                 else {
2791                                         if (am_sender)
2792                                                 file->flags |= FLAG_DUPLICATE;
2793                                         else { /* Make sure we merge our vital flags. */
2794                                                 fp->flags |= file->flags & (FLAG_TOP_DIR|FLAG_CONTENT_DIR);
2795                                                 fp->flags &= file->flags | ~FLAG_IMPLIED_DIR;
2796                                         }
2797                                         keep = j, drop = i;
2798                                 }
2799                         } else
2800                                 keep = j, drop = i;
2801
2802                         if (!am_sender) {
2803                                 if (DEBUG_GTE(DUP, 1)) {
2804                                         rprintf(FINFO,
2805                                             "removing duplicate name %s from file list (%d)\n",
2806                                             f_name(file, fbuf), drop + flist->ndx_start);
2807                                 }
2808                                 clear_file(flist->sorted[drop]);
2809                         }
2810
2811                         if (keep == i) {
2812                                 if (flist->low == drop) {
2813                                         for (j = drop + 1;
2814                                              j < i && !F_IS_ACTIVE(flist->sorted[j]);
2815                                              j++) {}
2816                                         flist->low = j;
2817                                 }
2818                                 prev_i = i;
2819                         }
2820                 } else
2821                         prev_i = i;
2822         }
2823         flist->high = prev_i;
2824
2825         if (strip_root) {
2826                 /* We need to strip off the leading slashes for relative
2827                  * paths, but this must be done _after_ the sorting phase. */
2828                 for (i = flist->low; i <= flist->high; i++) {
2829                         struct file_struct *file = flist->sorted[i];
2830
2831                         if (!file->dirname)
2832                                 continue;
2833                         while (*file->dirname == '/')
2834                                 file->dirname++;
2835                         if (!*file->dirname)
2836                                 file->dirname = NULL;
2837                 }
2838         }
2839
2840         if (prune_empty_dirs && !am_sender) {
2841                 int j, prev_depth = 0;
2842
2843                 prev_i = 0; /* It's OK that this isn't really true. */
2844
2845                 for (i = flist->low; i <= flist->high; i++) {
2846                         struct file_struct *fp, *file = flist->sorted[i];
2847
2848                         /* This temporarily abuses the F_DEPTH() value for a
2849                          * directory that is in a chain that might get pruned.
2850                          * We restore the old value if it gets a reprieve. */
2851                         if (S_ISDIR(file->mode) && F_DEPTH(file)) {
2852                                 /* Dump empty dirs when coming back down. */
2853                                 for (j = prev_depth; j >= F_DEPTH(file); j--) {
2854                                         fp = flist->sorted[prev_i];
2855                                         if (F_DEPTH(fp) >= 0)
2856                                                 break;
2857                                         prev_i = -F_DEPTH(fp)-1;
2858                                         clear_file(fp);
2859                                 }
2860                                 prev_depth = F_DEPTH(file);
2861                                 if (is_excluded(f_name(file, fbuf), 1,
2862                                                        ALL_FILTERS)) {
2863                                         /* Keep dirs through this dir. */
2864                                         for (j = prev_depth-1; ; j--) {
2865                                                 fp = flist->sorted[prev_i];
2866                                                 if (F_DEPTH(fp) >= 0)
2867                                                         break;
2868                                                 prev_i = -F_DEPTH(fp)-1;
2869                                                 F_DEPTH(fp) = j;
2870                                         }
2871                                 } else
2872                                         F_DEPTH(file) = -prev_i-1;
2873                                 prev_i = i;
2874                         } else {
2875                                 /* Keep dirs through this non-dir. */
2876                                 for (j = prev_depth; ; j--) {
2877                                         fp = flist->sorted[prev_i];
2878                                         if (F_DEPTH(fp) >= 0)
2879                                                 break;
2880                                         prev_i = -F_DEPTH(fp)-1;
2881                                         F_DEPTH(fp) = j;
2882                                 }
2883                         }
2884                 }
2885                 /* Dump all remaining empty dirs. */
2886                 while (1) {
2887                         struct file_struct *fp = flist->sorted[prev_i];
2888                         if (F_DEPTH(fp) >= 0)
2889                                 break;
2890                         prev_i = -F_DEPTH(fp)-1;
2891                         clear_file(fp);
2892                 }
2893
2894                 for (i = flist->low; i <= flist->high; i++) {
2895                         if (F_IS_ACTIVE(flist->sorted[i]))
2896                                 break;
2897                 }
2898                 flist->low = i;
2899                 for (i = flist->high; i >= flist->low; i--) {
2900                         if (F_IS_ACTIVE(flist->sorted[i]))
2901                                 break;
2902                 }
2903                 flist->high = i;
2904         }
2905 }
2906
2907 static void output_flist(struct file_list *flist)
2908 {
2909         char uidbuf[16], gidbuf[16], depthbuf[16];
2910         struct file_struct *file;
2911         const char *root, *dir, *slash, *name, *trail;
2912         const char *who = who_am_i();
2913         int i;
2914
2915         rprintf(FINFO, "[%s] flist start=%d, used=%d, low=%d, high=%d\n",
2916                 who, flist->ndx_start, flist->used, flist->low, flist->high);
2917         for (i = 0; i < flist->used; i++) {
2918                 file = flist->files[i];
2919                 if ((am_root || am_sender) && uid_ndx) {
2920                         snprintf(uidbuf, sizeof uidbuf, " uid=%u",
2921                                  F_OWNER(file));
2922                 } else
2923                         *uidbuf = '\0';
2924                 if (gid_ndx) {
2925                         static char parens[] = "(\0)\0\0\0";
2926                         char *pp = parens + (file->flags & FLAG_SKIP_GROUP ? 0 : 3);
2927                         snprintf(gidbuf, sizeof gidbuf, " gid=%s%u%s",
2928                                  pp, F_GROUP(file), pp + 2);
2929                 } else
2930                         *gidbuf = '\0';
2931                 if (!am_sender)
2932                         snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file));
2933                 if (F_IS_ACTIVE(file)) {
2934                         root = am_sender ? NS(F_PATHNAME(file)) : depthbuf;
2935                         if ((dir = file->dirname) == NULL)
2936                                 dir = slash = "";
2937                         else
2938                                 slash = "/";
2939                         name = file->basename;
2940                         trail = S_ISDIR(file->mode) ? "/" : "";
2941                 } else
2942                         root = dir = slash = name = trail = "";
2943                 rprintf(FINFO,
2944                         "[%s] i=%d %s %s%s%s%s mode=0%o len=%s%s%s flags=%x\n",
2945                         who, i + flist->ndx_start,
2946                         root, dir, slash, name, trail,
2947                         (int)file->mode, comma_num(F_LENGTH(file)),
2948                         uidbuf, gidbuf, file->flags);
2949         }
2950 }
2951
2952 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
2953 enum fnc_type { t_PATH, t_ITEM };
2954
2955 static int found_prefix;
2956
2957 /* Compare the names of two file_struct entities, similar to how strcmp()
2958  * would do if it were operating on the joined strings.
2959  *
2960  * Some differences beginning with protocol_version 29: (1) directory names
2961  * are compared with an assumed trailing slash so that they compare in a
2962  * way that would cause them to sort immediately prior to any content they
2963  * may have; (2) a directory of any name compares after a non-directory of
2964  * any name at the same depth; (3) a directory with name "." compares prior
2965  * to anything else.  These changes mean that a directory and a non-dir
2966  * with the same name will not compare as equal (protocol_version >= 29).
2967  *
2968  * The dirname component can be an empty string, but the basename component
2969  * cannot (and never is in the current codebase).  The basename component
2970  * may be NULL (for a removed item), in which case it is considered to be
2971  * after any existing item. */
2972 int f_name_cmp(const struct file_struct *f1, const struct file_struct *f2)
2973 {
2974         int dif;
2975         const uchar *c1, *c2;
2976         enum fnc_state state1, state2;
2977         enum fnc_type type1, type2;
2978         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
2979
2980         if (!f1 || !F_IS_ACTIVE(f1)) {
2981                 if (!f2 || !F_IS_ACTIVE(f2))
2982                         return 0;
2983                 return -1;
2984         }
2985         if (!f2 || !F_IS_ACTIVE(f2))
2986                 return 1;
2987
2988         c1 = (uchar*)f1->dirname;
2989         c2 = (uchar*)f2->dirname;
2990         if (c1 == c2)
2991                 c1 = c2 = NULL;
2992         if (!c1) {
2993                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2994                 c1 = (const uchar*)f1->basename;
2995                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2996                         type1 = t_ITEM;
2997                         state1 = s_TRAILING;
2998                         c1 = (uchar*)"";
2999                 } else
3000                         state1 = s_BASE;
3001         } else {
3002                 type1 = t_path;
3003                 state1 = s_DIR;
3004         }
3005         if (!c2) {
3006                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
3007                 c2 = (const uchar*)f2->basename;
3008                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
3009                         type2 = t_ITEM;
3010                         state2 = s_TRAILING;
3011                         c2 = (uchar*)"";
3012                 } else
3013                         state2 = s_BASE;
3014         } else {
3015                 type2 = t_path;
3016                 state2 = s_DIR;
3017         }
3018
3019         if (type1 != type2)
3020                 return type1 == t_PATH ? 1 : -1;
3021
3022         do {
3023                 if (!*c1) {
3024                         switch (state1) {
3025                         case s_DIR:
3026                                 state1 = s_SLASH;
3027                                 c1 = (uchar*)"/";
3028                                 break;
3029                         case s_SLASH:
3030                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
3031                                 c1 = (const uchar*)f1->basename;
3032                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
3033                                         type1 = t_ITEM;
3034                                         state1 = s_TRAILING;
3035                                         c1 = (uchar*)"";
3036                                 } else
3037                                         state1 = s_BASE;
3038                                 break;
3039                         case s_BASE:
3040                                 state1 = s_TRAILING;
3041                                 if (type1 == t_PATH) {
3042                                         c1 = (uchar*)"/";
3043                                         break;
3044                                 }
3045                                 /* FALL THROUGH */
3046                         case s_TRAILING:
3047                                 type1 = t_ITEM;
3048                                 break;
3049                         }
3050                         if (*c2 && type1 != type2)
3051                                 return type1 == t_PATH ? 1 : -1;
3052                 }
3053                 if (!*c2) {
3054                         switch (state2) {
3055                         case s_DIR:
3056                                 state2 = s_SLASH;
3057                                 c2 = (uchar*)"/";
3058                                 break;
3059                         case s_SLASH:
3060                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
3061                                 c2 = (const uchar*)f2->basename;
3062                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
3063                                         type2 = t_ITEM;
3064                                         state2 = s_TRAILING;
3065                                         c2 = (uchar*)"";
3066                                 } else
3067                                         state2 = s_BASE;
3068                                 break;
3069                         case s_BASE:
3070                                 state2 = s_TRAILING;
3071                                 if (type2 == t_PATH) {
3072                                         c2 = (uchar*)"/";
3073                                         break;
3074                                 }
3075                                 /* FALL THROUGH */
3076                         case s_TRAILING:
3077                                 found_prefix = 1;
3078                                 if (!*c1)
3079                                         return 0;
3080                                 type2 = t_ITEM;
3081                                 break;
3082                         }
3083                         if (type1 != type2)
3084                                 return type1 == t_PATH ? 1 : -1;
3085                 }
3086         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
3087
3088         return dif;
3089 }
3090
3091 /* Returns 1 if f1's filename has all of f2's filename as a prefix.  This does
3092  * not match if f2's basename is not an exact match of a path element in f1.
3093  * E.g. /path/foo is not a prefix of /path/foobar/baz, but /path/foobar is. */
3094 int f_name_has_prefix(const struct file_struct *f1, const struct file_struct *f2)
3095 {
3096         found_prefix = 0;
3097         f_name_cmp(f1, f2);
3098         return found_prefix;
3099 }
3100
3101 char *f_name_buf(void)
3102 {
3103         static char names[5][MAXPATHLEN];
3104         static unsigned int n;
3105
3106         n = (n + 1) % (sizeof names / sizeof names[0]);
3107
3108         return names[n];
3109 }
3110
3111 /* Return a copy of the full filename of a flist entry, using the indicated
3112  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
3113  * done because we checked the size when creating the file_struct entry.
3114  */
3115 char *f_name(const struct file_struct *f, char *fbuf)
3116 {
3117         if (!f || !F_IS_ACTIVE(f))
3118                 return NULL;
3119
3120         if (!fbuf)
3121                 fbuf = f_name_buf();
3122
3123         if (f->dirname) {
3124                 int len = strlen(f->dirname);
3125                 memcpy(fbuf, f->dirname, len);
3126                 fbuf[len] = '/';
3127                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
3128         } else
3129                 strlcpy(fbuf, f->basename, MAXPATHLEN);
3130
3131         return fbuf;
3132 }
3133
3134 /* Do a non-recursive scan of the named directory, possibly ignoring all
3135  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
3136  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
3137  * buffer (the functions we call will append names onto the end, but the old
3138  * dir value will be restored on exit). */
3139 struct file_list *get_dirlist(char *dirname, int dlen, int ignore_filter_rules)
3140 {
3141         struct file_list *dirlist;
3142         char dirbuf[MAXPATHLEN];
3143         int save_recurse = recurse;
3144         int save_xfer_dirs = xfer_dirs;
3145         int save_prune_empty_dirs = prune_empty_dirs;
3146
3147         if (dlen < 0) {
3148                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
3149                 if (dlen >= MAXPATHLEN)
3150                         return NULL;
3151                 dirname = dirbuf;
3152         }
3153
3154         dirlist = flist_new(FLIST_TEMP, "get_dirlist");
3155
3156         recurse = 0;
3157         xfer_dirs = 1;
3158         send_directory(ignore_filter_rules ? -2 : -1, dirlist, dirname, dlen, FLAG_CONTENT_DIR);
3159         xfer_dirs = save_xfer_dirs;
3160         recurse = save_recurse;
3161         if (INFO_GTE(PROGRESS, 1))
3162                 flist_count_offset += dirlist->used;
3163
3164         prune_empty_dirs = 0;
3165         dirlist->sorted = dirlist->files;
3166         flist_sort_and_clean(dirlist, 0);
3167         prune_empty_dirs = save_prune_empty_dirs;
3168
3169         if (DEBUG_GTE(FLIST, 3))
3170                 output_flist(dirlist);
3171
3172         return dirlist;
3173 }