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                          unsigned int *phys_depth_p)
 203 {
 204 #ifdef SUPPORT_LINKS
 205         if (link_stat(path, stp, copy_dirlinks) < 0)
 206                 return -1;
 207         if (S_ISLNK(stp->st_mode)) {
 208                 int llen = do_readlink(path, linkbuf, MAXPATHLEN - 1);
 209                 if (llen < 0)
 210                         return -1;
 211                 linkbuf[llen] = '\0';
 212                 if (copy_unsafe_links && unsafe_symlink(linkbuf, *phys_depth_p)) {
 213                         if (INFO_GTE(SYMSAFE, 1)) {
 214                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 215                                         path, linkbuf);
 216                         }
 217                         *phys_depth_p = 0;
 218                         return x_stat(path, stp, NULL);
 219                 }
 220                 if (munge_symlinks && am_sender && llen > SYMLINK_PREFIX_LEN
 221                  && strncmp(linkbuf, SYMLINK_PREFIX, SYMLINK_PREFIX_LEN) == 0) {
 222                         memmove(linkbuf, linkbuf + SYMLINK_PREFIX_LEN,
 223                                 llen - SYMLINK_PREFIX_LEN + 1);
 224                 }
 225         }
 226         if (copy_unsafe_links && S_ISDIR(stp->st_mode))
 227                 (*phys_depth_p)++;
 228         return 0;
 229 #else
 230         return x_stat(path, stp, NULL);
 231 #endif
 232 }
 233
 234 int link_stat(const char *path, STRUCT_STAT *stp, int follow_dirlinks)
 235 {
 236 #ifdef SUPPORT_LINKS
 237         if (copy_links)
 238                 return x_stat(path, stp, NULL);
 239         if (x_lstat(path, stp, NULL) < 0)
 240                 return -1;
 241         if (follow_dirlinks && S_ISLNK(stp->st_mode)) {
 242                 STRUCT_STAT st;
 243                 if (x_stat(path, &st, NULL) == 0 && S_ISDIR(st.st_mode))
 244                         *stp = st;
 245         }
 246         return 0;
 247 #else
 248         return x_stat(path, stp, NULL);
 249 #endif
 250 }
 251
 252 static inline int is_daemon_excluded(const char *fname, int is_dir)
 253 {
 254         if (daemon_filter_list.head
 255          && check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
 256                 errno = ENOENT;
 257                 return 1;
 258         }
 259         return 0;
 260 }
 261
 262 static inline int path_is_daemon_excluded(char *path, int ignore_filename)
 263 {
 264         if (daemon_filter_list.head) {
 265                 char *slash = path;
 266
 267                 while ((slash = strchr(slash+1, '/')) != NULL) {
 268                         int ret;
 269                         *slash = '\0';
 270                         ret = check_filter(&daemon_filter_list, FLOG, path, 1);
 271                         *slash = '/';
 272                         if (ret < 0) {
 273                                 errno = ENOENT;
 274                                 return 1;
 275                         }
 276                 }
 277
 278                 if (!ignore_filename
 279                  && check_filter(&daemon_filter_list, FLOG, path, 1) < 0) {
 280                         errno = ENOENT;
 281                         return 1;
 282                 }
 283         }
 284
 285         return 0;
 286 }
 287
 288 /* This function is used to check if a file should be included/excluded
 289  * from the list of files based on its name and type etc.  The value of
 290  * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
 291 static int is_excluded(const char *fname, int is_dir, int filter_level)
 292 {
 293 #if 0 /* This currently never happens, so avoid a useless compare. */
 294         if (filter_level == NO_FILTERS)
 295                 return 0;
 296 #endif
 297         if (is_daemon_excluded(fname, is_dir))
 298                 return 1;
 299         if (filter_level != ALL_FILTERS)
 300                 return 0;
 301         if (filter_list.head
 302             && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
 303                 return 1;
 304         return 0;
 305 }
 306
 307 static void send_directory(int f, struct file_list *flist,
 308                            char *fbuf, int len, int flags, unsigned int phys_depth);
 309
 310 static const char *pathname, *orig_dir;
 311 static int pathname_len;
 312
 313 /* Make sure flist can hold at least flist->used + extra entries. */
 314 static void flist_expand(struct file_list *flist, int extra)
 315 {
 316         struct file_struct **new_ptr;
 317
 318         if (flist->used + extra <= flist->malloced)
 319                 return;
 320
 321         if (flist->malloced < FLIST_START)
 322                 flist->malloced = FLIST_START;
 323         else if (flist->malloced >= FLIST_LINEAR)
 324                 flist->malloced += FLIST_LINEAR;
 325         else
 326                 flist->malloced *= 2;
 327
 328         /* In case count jumped or we are starting the list
 329          * with a known size just set it. */
 330         if (flist->malloced < flist->used + extra)
 331                 flist->malloced = flist->used + extra;
 332
 333         new_ptr = realloc_array(flist->files, struct file_struct *,
 334                                 flist->malloced);
 335
 336         if (DEBUG_GTE(FLIST, 1) && flist->malloced != FLIST_START) {
 337                 rprintf(FCLIENT, "[%s] expand file_list pointer array to %s bytes, did%s move\n",
 338                     who_am_i(),
 339                     big_num(sizeof flist->files[0] * flist->malloced),
 340                     (new_ptr == flist->files) ? " not" : "");
 341         }
 342
 343         flist->files = new_ptr;
 344
 345         if (!flist->files)
 346                 out_of_memory("flist_expand");
 347 }
 348
 349 static void flist_done_allocating(struct file_list *flist)
 350 {
 351         void *ptr = pool_boundary(flist->file_pool, 8*1024);
 352         if (flist->pool_boundary == ptr)
 353                 flist->pool_boundary = NULL; /* list didn't use any pool memory */
 354         else
 355                 flist->pool_boundary = ptr;
 356 }
 357
 358 /* Call this with EITHER (1) "file, NULL, 0" to chdir() to the file's
 359  * F_PATHNAME(), or (2) "NULL, dir, dirlen" to chdir() to the supplied dir,
 360  * with dir == NULL taken to be the starting directory, and dirlen < 0
 361  * indicating that strdup(dir) should be called and then the -dirlen length
 362  * value checked to ensure that it is not daemon-excluded. */
 363 int change_pathname(struct file_struct *file, const char *dir, int dirlen)
 364 {
 365         if (dirlen < 0) {
 366                 char *cpy = strdup(dir);
 367                 if (*cpy != '/')
 368                         change_dir(orig_dir, CD_SKIP_CHDIR);
 369                 if (path_is_daemon_excluded(cpy, 0))
 370                         goto chdir_error;
 371                 dir = cpy;
 372                 dirlen = -dirlen;
 373         } else {
 374                 if (file) {
 375                         if (pathname == F_PATHNAME(file))
 376                                 return 1;
 377                         dir = F_PATHNAME(file);
 378                         if (dir)
 379                                 dirlen = strlen(dir);
 380                 } else if (pathname == dir)
 381                         return 1;
 382                 if (dir && *dir != '/')
 383                         change_dir(orig_dir, CD_SKIP_CHDIR);
 384         }
 385
 386         pathname = dir;
 387         pathname_len = dirlen;
 388
 389         if (!dir)
 390                 dir = orig_dir;
 391
 392         if (!change_dir(dir, CD_NORMAL)) {
 393           chdir_error:
 394                 io_error |= IOERR_GENERAL;
 395                 rsyserr(FERROR_XFER, errno, "change_dir %s failed", full_fname(dir));
 396                 if (dir != orig_dir)
 397                         change_dir(orig_dir, CD_NORMAL);
 398                 pathname = NULL;
 399                 pathname_len = 0;
 400                 return 0;
 401         }
 402
 403         return 1;
 404 }
 405
 406 static void send_file_entry(int f, const char *fname, struct file_struct *file,
 407 #ifdef SUPPORT_LINKS
 408                             const char *symlink_name, int symlink_len,
 409 #endif
 410                             int ndx, int first_ndx)
 411 {
 412         static time_t modtime;
 413         static mode_t mode;
 414 #ifdef SUPPORT_HARD_LINKS
 415         static int64 dev;
 416 #endif
 417         static dev_t rdev;
 418         static uint32 rdev_major;
 419         static uid_t uid;
 420         static gid_t gid;
 421         static const char *user_name, *group_name;
 422         static char lastname[MAXPATHLEN];
 423 #ifdef SUPPORT_HARD_LINKS
 424         int first_hlink_ndx = -1;
 425 #endif
 426         int l1, l2;
 427         int xflags;
 428
 429         /* Initialize starting value of xflags and adjust counts. */
 430         if (S_ISREG(file->mode))
 431                 xflags = 0;
 432         else if (S_ISDIR(file->mode)) {
 433                 stats.num_dirs++;
 434                 if (protocol_version >= 30) {
 435                         if (file->flags & FLAG_CONTENT_DIR)
 436                                 xflags = file->flags & FLAG_TOP_DIR;
 437                         else if (file->flags & FLAG_IMPLIED_DIR)
 438                                 xflags = XMIT_TOP_DIR | XMIT_NO_CONTENT_DIR;
 439                         else
 440                                 xflags = XMIT_NO_CONTENT_DIR;
 441                 } else
 442                         xflags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */
 443         } else {
 444                 if (S_ISLNK(file->mode))
 445                         stats.num_symlinks++;
 446                 else if (IS_DEVICE(file->mode))
 447                         stats.num_devices++;
 448                 else if (IS_SPECIAL(file->mode))
 449                         stats.num_specials++;
 450                 xflags = 0;
 451         }
 452
 453         if (file->mode == mode)
 454                 xflags |= XMIT_SAME_MODE;
 455         else
 456                 mode = file->mode;
 457
 458         if (preserve_devices && IS_DEVICE(mode)) {
 459                 if (protocol_version < 28) {
 460                         if (tmp_rdev == rdev)
 461                                 xflags |= XMIT_SAME_RDEV_pre28;
 462                         else
 463                                 rdev = tmp_rdev;
 464                 } else {
 465                         rdev = tmp_rdev;
 466                         if ((uint32)major(rdev) == rdev_major)
 467                                 xflags |= XMIT_SAME_RDEV_MAJOR;
 468                         else
 469                                 rdev_major = major(rdev);
 470                         if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu)
 471                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
 472                 }
 473         } else if (preserve_specials && IS_SPECIAL(mode) && protocol_version < 31) {
 474                 /* Special files don't need an rdev number, so just make
 475                  * the historical transmission of the value efficient. */
 476                 if (protocol_version < 28)
 477                         xflags |= XMIT_SAME_RDEV_pre28;
 478                 else {
 479                         rdev = MAKEDEV(major(rdev), 0);
 480                         xflags |= XMIT_SAME_RDEV_MAJOR;
 481                         if (protocol_version < 30)
 482                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
 483                 }
 484         } else if (protocol_version < 28)
 485                 rdev = MAKEDEV(0, 0);
 486         if (!preserve_uid || ((uid_t)F_OWNER(file) == uid && *lastname))
 487                 xflags |= XMIT_SAME_UID;
 488         else {
 489                 uid = F_OWNER(file);
 490                 if (!numeric_ids) {
 491                         user_name = add_uid(uid);
 492                         if (inc_recurse && user_name)
 493                                 xflags |= XMIT_USER_NAME_FOLLOWS;
 494                 }
 495         }
 496         if (!preserve_gid || ((gid_t)F_GROUP(file) == gid && *lastname))
 497                 xflags |= XMIT_SAME_GID;
 498         else {
 499                 gid = F_GROUP(file);
 500                 if (!numeric_ids) {
 501                         group_name = add_gid(gid);
 502                         if (inc_recurse && group_name)
 503                                 xflags |= XMIT_GROUP_NAME_FOLLOWS;
 504                 }
 505         }
 506         if (file->modtime == modtime)
 507                 xflags |= XMIT_SAME_TIME;
 508         else
 509                 modtime = file->modtime;
 510         if (NSEC_BUMP(file) && protocol_version >= 31)
 511                 xflags |= XMIT_MOD_NSEC;
 512
 513 #ifdef SUPPORT_HARD_LINKS
 514         if (tmp_dev != 0) {
 515                 if (protocol_version >= 30) {
 516                         struct ht_int64_node *np = idev_find(tmp_dev, tmp_ino);
 517                         first_hlink_ndx = (int32)(long)np->data - 1;
 518                         if (first_hlink_ndx < 0) {
 519                                 np->data = (void*)(long)(first_ndx + ndx + 1);
 520                                 xflags |= XMIT_HLINK_FIRST;
 521                         }
 522                         if (DEBUG_GTE(HLINK, 1)) {
 523                                 if (first_hlink_ndx >= 0) {
 524                                         rprintf(FINFO, "[%s] #%d hard-links #%d (%sabbrev)\n",
 525                                                 who_am_i(), first_ndx + ndx, first_hlink_ndx,
 526                                                 first_hlink_ndx >= first_ndx ? "" : "un");
 527                                 } else if (DEBUG_GTE(HLINK, 3)) {
 528                                         rprintf(FINFO, "[%s] dev:inode for #%d is %s:%s\n",
 529                                                 who_am_i(), first_ndx + ndx,
 530                                                 big_num(tmp_dev), big_num(tmp_ino));
 531                                 }
 532                         }
 533                 } else {
 534                         if (tmp_dev == dev) {
 535                                 if (protocol_version >= 28)
 536                                         xflags |= XMIT_SAME_DEV_pre30;
 537                         } else
 538                                 dev = tmp_dev;
 539                 }
 540                 xflags |= XMIT_HLINKED;
 541         }
 542 #endif
 543
 544         for (l1 = 0;
 545             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 546             l1++) {}
 547         l2 = strlen(fname+l1);
 548
 549         if (l1 > 0)
 550                 xflags |= XMIT_SAME_NAME;
 551         if (l2 > 255)
 552                 xflags |= XMIT_LONG_NAME;
 553
 554         /* We must make sure we don't send a zero flag byte or the
 555          * other end will terminate the flist transfer.  Note that
 556          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 557          * it's harmless way to add a bit to the first flag byte. */
 558         if (protocol_version >= 28) {
 559                 if (!xflags && !S_ISDIR(mode))
 560                         xflags |= XMIT_TOP_DIR;
 561                 if ((xflags & 0xFF00) || !xflags) {
 562                         xflags |= XMIT_EXTENDED_FLAGS;
 563                         write_shortint(f, xflags);
 564                 } else
 565                         write_byte(f, xflags);
 566         } else {
 567                 if (!(xflags & 0xFF))
 568                         xflags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
 569                 write_byte(f, xflags);
 570         }
 571         if (xflags & XMIT_SAME_NAME)
 572                 write_byte(f, l1);
 573         if (xflags & XMIT_LONG_NAME)
 574                 write_varint30(f, l2);
 575         else
 576                 write_byte(f, l2);
 577         write_buf(f, fname + l1, l2);
 578
 579 #ifdef SUPPORT_HARD_LINKS
 580         if (first_hlink_ndx >= 0) {
 581                 write_varint(f, first_hlink_ndx);
 582                 if (first_hlink_ndx >= first_ndx)
 583                         goto the_end;
 584         }
 585 #endif
 586
 587         write_varlong30(f, F_LENGTH(file), 3);
 588         if (!(xflags & XMIT_SAME_TIME)) {
 589                 if (protocol_version >= 30)
 590                         write_varlong(f, modtime, 4);
 591                 else
 592                         write_int(f, modtime);
 593         }
 594         if (xflags & XMIT_MOD_NSEC)
 595                 write_varint(f, F_MOD_NSEC(file));
 596         if (!(xflags & XMIT_SAME_MODE))
 597                 write_int(f, to_wire_mode(mode));
 598         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
 599                 if (protocol_version < 30)
 600                         write_int(f, uid);
 601                 else {
 602                         write_varint(f, uid);
 603                         if (xflags & XMIT_USER_NAME_FOLLOWS) {
 604                                 int len = strlen(user_name);
 605                                 write_byte(f, len);
 606                                 write_buf(f, user_name, len);
 607                         }
 608                 }
 609         }
 610         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
 611                 if (protocol_version < 30)
 612                         write_int(f, gid);
 613                 else {
 614                         write_varint(f, gid);
 615                         if (xflags & XMIT_GROUP_NAME_FOLLOWS) {
 616                                 int len = strlen(group_name);
 617                                 write_byte(f, len);
 618                                 write_buf(f, group_name, len);
 619                         }
 620                 }
 621         }
 622         if ((preserve_devices && IS_DEVICE(mode))
 623          || (preserve_specials && IS_SPECIAL(mode) && protocol_version < 31)) {
 624                 if (protocol_version < 28) {
 625                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 626                                 write_int(f, (int)rdev);
 627                 } else {
 628                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 629                                 write_varint30(f, major(rdev));
 630                         if (protocol_version >= 30)
 631                                 write_varint(f, minor(rdev));
 632                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 633                                 write_byte(f, minor(rdev));
 634                         else
 635                                 write_int(f, minor(rdev));
 636                 }
 637         }
 638
 639 #ifdef SUPPORT_LINKS
 640         if (symlink_len) {
 641                 write_varint30(f, symlink_len);
 642                 write_buf(f, symlink_name, symlink_len);
 643         }
 644 #endif
 645
 646 #ifdef SUPPORT_HARD_LINKS
 647         if (tmp_dev != 0 && protocol_version < 30) {
 648                 if (protocol_version < 26) {
 649                         /* 32-bit dev_t and ino_t */
 650                         write_int(f, (int32)dev);
 651                         write_int(f, (int32)tmp_ino);
 652                 } else {
 653                         /* 64-bit dev_t and ino_t */
 654                         if (!(xflags & XMIT_SAME_DEV_pre30))
 655                                 write_longint(f, dev);
 656                         write_longint(f, tmp_ino);
 657                 }
 658         }
 659 #endif
 660
 661         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 662                 const char *sum;
 663                 if (S_ISREG(mode))
 664                         sum = tmp_sum;
 665                 else {
 666                         /* Prior to 28, we sent a useless set of nulls. */
 667                         sum = empty_sum;
 668                 }
 669                 write_buf(f, sum, checksum_len);
 670         }
 671
 672 #ifdef SUPPORT_HARD_LINKS
 673   the_end:
 674 #endif
 675         strlcpy(lastname, fname, MAXPATHLEN);
 676
 677         if (S_ISREG(mode) || S_ISLNK(mode))
 678                 stats.total_size += F_LENGTH(file);
 679 }
 680
 681 static struct file_struct *recv_file_entry(int f, struct file_list *flist, int xflags)
 682 {
 683         static int64 modtime;
 684         static mode_t mode;
 685 #ifdef SUPPORT_HARD_LINKS
 686         static int64 dev;
 687 #endif
 688         static dev_t rdev;
 689         static uint32 rdev_major;
 690         static uid_t uid;
 691         static gid_t gid;
 692         static uint16 gid_flags;
 693         static char lastname[MAXPATHLEN], *lastdir;
 694         static int lastdir_depth, lastdir_len = -1;
 695         static unsigned int del_hier_name_len = 0;
 696         static int in_del_hier = 0;
 697         char thisname[MAXPATHLEN];
 698         unsigned int l1 = 0, l2 = 0;
 699         int alloc_len, basename_len, linkname_len;
 700         int extra_len = file_extra_cnt * EXTRA_LEN;
 701         int first_hlink_ndx = -1;
 702         int64 file_length;
 703         uint32 modtime_nsec;
 704         const char *basename;
 705         struct file_struct *file;
 706         alloc_pool_t *pool;
 707         char *bp;
 708
 709         if (xflags & XMIT_SAME_NAME)
 710                 l1 = read_byte(f);
 711
 712         if (xflags & XMIT_LONG_NAME)
 713                 l2 = read_varint30(f);
 714         else
 715                 l2 = read_byte(f);
 716
 717         if (l2 >= MAXPATHLEN - l1) {
 718                 rprintf(FERROR,
 719                         "overflow: xflags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
 720                         xflags, l1, l2, lastname, who_am_i());
 721                 overflow_exit("recv_file_entry");
 722         }
 723
 724         strlcpy(thisname, lastname, l1 + 1);
 725         read_sbuf(f, &thisname[l1], l2);
 726         thisname[l1 + l2] = 0;
 727
 728         /* Abuse basename_len for a moment... */
 729         basename_len = strlcpy(lastname, thisname, MAXPATHLEN);
 730
 731 #ifdef ICONV_OPTION
 732         if (ic_recv != (iconv_t)-1) {
 733                 xbuf outbuf, inbuf;
 734
 735                 INIT_CONST_XBUF(outbuf, thisname);
 736                 INIT_XBUF(inbuf, lastname, basename_len, (size_t)-1);
 737
 738                 if (iconvbufs(ic_recv, &inbuf, &outbuf, 0) < 0) {
 739                         io_error |= IOERR_GENERAL;
 740                         rprintf(FERROR_UTF8,
 741                             "[%s] cannot convert filename: %s (%s)\n",
 742                             who_am_i(), lastname, strerror(errno));
 743                         outbuf.len = 0;
 744                 }
 745                 thisname[outbuf.len] = '\0';
 746         }
 747 #endif
 748
 749         if (*thisname)
 750                 clean_fname(thisname, 0);
 751
 752         if (sanitize_paths)
 753                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
 754
 755         if ((basename = strrchr(thisname, '/')) != NULL) {
 756                 int len = basename++ - thisname;
 757                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
 758                         lastdir = new_array(char, len + 1);
 759                         memcpy(lastdir, thisname, len);
 760                         lastdir[len] = '\0';
 761                         lastdir_len = len;
 762                         lastdir_depth = count_dir_elements(lastdir);
 763                 }
 764         } else
 765                 basename = thisname;
 766         basename_len = strlen(basename) + 1; /* count the '\0' */
 767
 768 #ifdef SUPPORT_HARD_LINKS
 769         if (protocol_version >= 30
 770          && BITS_SETnUNSET(xflags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
 771                 first_hlink_ndx = read_varint(f);
 772                 if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->ndx_start + flist->used) {
 773                         rprintf(FERROR,
 774                                 "hard-link reference out of range: %d (%d)\n",
 775                                 first_hlink_ndx, flist->ndx_start + flist->used);
 776                         exit_cleanup(RERR_PROTOCOL);
 777                 }
 778                 if (DEBUG_GTE(HLINK, 1)) {
 779                         rprintf(FINFO, "[%s] #%d hard-links #%d (%sabbrev)\n",
 780                                 who_am_i(), flist->used+flist->ndx_start, first_hlink_ndx,
 781                                 first_hlink_ndx >= flist->ndx_start ? "" : "un");
 782                 }
 783                 if (first_hlink_ndx >= flist->ndx_start) {
 784                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 785                         file_length = F_LENGTH(first);
 786                         modtime = first->modtime;
 787                         modtime_nsec = F_MOD_NSEC(first);
 788                         mode = first->mode;
 789                         if (preserve_uid)
 790                                 uid = F_OWNER(first);
 791                         if (preserve_gid)
 792                                 gid = F_GROUP(first);
 793                         if (preserve_devices && IS_DEVICE(mode)) {
 794                                 uint32 *devp = F_RDEV_P(first);
 795                                 rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
 796                                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 797                         }
 798                         if (preserve_links && S_ISLNK(mode))
 799                                 linkname_len = strlen(F_SYMLINK(first)) + 1;
 800                         else
 801                                 linkname_len = 0;
 802                         goto create_object;
 803                 }
 804         }
 805 #endif
 806
 807         file_length = read_varlong30(f, 3);
 808         if (!(xflags & XMIT_SAME_TIME)) {
 809                 if (protocol_version >= 30) {
 810                         modtime = read_varlong(f, 4);
 811 #if SIZEOF_TIME_T < SIZEOF_INT64
 812                         if (!am_generator && (int64)(time_t)modtime != modtime) {
 813                                 rprintf(FERROR_XFER,
 814                                     "Time value of %s truncated on receiver.\n",
 815                                     lastname);
 816                         }
 817 #endif
 818                 } else
 819                         modtime = read_int(f);
 820         }
 821         if (xflags & XMIT_MOD_NSEC)
 822                 modtime_nsec = read_varint(f);
 823         else
 824                 modtime_nsec = 0;
 825         if (!(xflags & XMIT_SAME_MODE))
 826                 mode = from_wire_mode(read_int(f));
 827
 828         if (chmod_modes && !S_ISLNK(mode) && mode)
 829                 mode = tweak_mode(mode, chmod_modes);
 830
 831         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
 832                 if (protocol_version < 30)
 833                         uid = (uid_t)read_int(f);
 834                 else {
 835                         uid = (uid_t)read_varint(f);
 836                         if (xflags & XMIT_USER_NAME_FOLLOWS)
 837                                 uid = recv_user_name(f, uid);
 838                         else if (inc_recurse && am_root && (!numeric_ids || usermap))
 839                                 uid = match_uid(uid);
 840                 }
 841         }
 842         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
 843                 if (protocol_version < 30)
 844                         gid = (gid_t)read_int(f);
 845                 else {
 846                         gid = (gid_t)read_varint(f);
 847                         gid_flags = 0;
 848                         if (xflags & XMIT_GROUP_NAME_FOLLOWS)
 849                                 gid = recv_group_name(f, gid, &gid_flags);
 850                         else if (inc_recurse && (!am_root || !numeric_ids || groupmap))
 851                                 gid = match_gid(gid, &gid_flags);
 852                 }
 853         }
 854
 855         if ((preserve_devices && IS_DEVICE(mode))
 856          || (preserve_specials && IS_SPECIAL(mode) && protocol_version < 31)) {
 857                 if (protocol_version < 28) {
 858                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 859                                 rdev = (dev_t)read_int(f);
 860                 } else {
 861                         uint32 rdev_minor;
 862                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 863                                 rdev_major = read_varint30(f);
 864                         if (protocol_version >= 30)
 865                                 rdev_minor = read_varint(f);
 866                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 867                                 rdev_minor = read_byte(f);
 868                         else
 869                                 rdev_minor = read_int(f);
 870                         rdev = MAKEDEV(rdev_major, rdev_minor);
 871                 }
 872                 if (IS_DEVICE(mode))
 873                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 874                 file_length = 0;
 875         } else if (protocol_version < 28)
 876                 rdev = MAKEDEV(0, 0);
 877
 878 #ifdef SUPPORT_LINKS
 879         if (preserve_links && S_ISLNK(mode)) {
 880                 linkname_len = read_varint30(f) + 1; /* count the '\0' */
 881                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 882                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 883                                 linkname_len - 1);
 884                         overflow_exit("recv_file_entry");
 885                 }
 886 #ifdef ICONV_OPTION
 887                 /* We don't know how much extra room we need to convert
 888                  * the as-yet-unread symlink data, so let's hope that a
 889                  * double-size buffer is plenty. */
 890                 if (sender_symlink_iconv)
 891                         linkname_len *= 2;
 892 #endif
 893                 if (munge_symlinks)
 894                         linkname_len += SYMLINK_PREFIX_LEN;
 895         }
 896         else
 897 #endif
 898                 linkname_len = 0;
 899
 900 #ifdef SUPPORT_HARD_LINKS
 901   create_object:
 902         if (preserve_hard_links) {
 903                 if (protocol_version < 28 && S_ISREG(mode))
 904                         xflags |= XMIT_HLINKED;
 905                 if (xflags & XMIT_HLINKED)
 906                         extra_len += (inc_recurse+1) * EXTRA_LEN;
 907         }
 908 #endif
 909
 910 #ifdef SUPPORT_ACLS
 911         /* Directories need an extra int32 for the default ACL. */
 912         if (preserve_acls && S_ISDIR(mode))
 913                 extra_len += EXTRA_LEN;
 914 #endif
 915
 916         if (always_checksum && S_ISREG(mode))
 917                 extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
 918
 919 #if SIZEOF_INT64 >= 8
 920         if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
 921                 extra_len += EXTRA_LEN;
 922 #endif
 923 #ifdef HAVE_UTIMENSAT
 924         if (modtime_nsec)
 925                 extra_len += EXTRA_LEN;
 926 #endif
 927         if (file_length < 0) {
 928                 rprintf(FERROR, "Offset underflow: file-length is negative\n");
 929                 exit_cleanup(RERR_UNSUPPORTED);
 930         }
 931
 932         if (inc_recurse && S_ISDIR(mode)) {
 933                 if (one_file_system) {
 934                         /* Room to save the dir's device for -x */
 935                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 936                 }
 937                 pool = dir_flist->file_pool;
 938         } else
 939                 pool = flist->file_pool;
 940
 941 #if EXTRA_ROUNDING > 0
 942         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
 943                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
 944 #endif
 945
 946         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
 947                   + linkname_len;
 948         bp = pool_alloc(pool, alloc_len, "recv_file_entry");
 949
 950         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
 951         bp += extra_len;
 952         file = (struct file_struct *)bp;
 953         bp += FILE_STRUCT_LEN;
 954
 955         memcpy(bp, basename, basename_len);
 956
 957 #ifdef SUPPORT_HARD_LINKS
 958         if (xflags & XMIT_HLINKED)
 959                 file->flags |= FLAG_HLINKED;
 960 #endif
 961         file->modtime = (time_t)modtime;
 962 #ifdef HAVE_UTIMENSAT
 963         if (modtime_nsec) {
 964                 file->flags |= FLAG_MOD_NSEC;
 965                 OPT_EXTRA(file, 0)->unum = modtime_nsec;
 966         }
 967 #endif
 968         file->len32 = (uint32)file_length;
 969 #if SIZEOF_INT64 >= 8
 970         if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
 971 #if SIZEOF_CAPITAL_OFF_T < 8
 972                 rprintf(FERROR, "Offset overflow: attempted 64-bit file-length\n");
 973                 exit_cleanup(RERR_UNSUPPORTED);
 974 #else
 975                 file->flags |= FLAG_LENGTH64;
 976                 OPT_EXTRA(file, NSEC_BUMP(file))->unum = (uint32)(file_length >> 32);
 977 #endif
 978         }
 979 #endif
 980         file->mode = mode;
 981         if (preserve_uid)
 982                 F_OWNER(file) = uid;
 983         if (preserve_gid) {
 984                 F_GROUP(file) = gid;
 985                 file->flags |= gid_flags;
 986         }
 987         if (unsort_ndx)
 988                 F_NDX(file) = flist->used + flist->ndx_start;
 989
 990         if (basename != thisname) {
 991                 file->dirname = lastdir;
 992                 F_DEPTH(file) = lastdir_depth + 1;
 993         } else
 994                 F_DEPTH(file) = 1;
 995
 996         if (S_ISDIR(mode)) {
 997                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
 998                         F_DEPTH(file)--;
 999                 if (protocol_version >= 30) {
1000                         if (!(xflags & XMIT_NO_CONTENT_DIR)) {
1001                                 if (xflags & XMIT_TOP_DIR)
1002                                         file->flags |= FLAG_TOP_DIR;
1003                                 file->flags |= FLAG_CONTENT_DIR;
1004                         } else if (xflags & XMIT_TOP_DIR)
1005                                 file->flags |= FLAG_IMPLIED_DIR;
1006                 } else if (xflags & XMIT_TOP_DIR) {
1007                         in_del_hier = recurse;
1008                         del_hier_name_len = F_DEPTH(file) == 0 ? 0 : l1 + l2;
1009                         if (relative_paths && del_hier_name_len > 2
1010                             && lastname[del_hier_name_len-1] == '.'
1011                             && lastname[del_hier_name_len-2] == '/')
1012                                 del_hier_name_len -= 2;
1013                         file->flags |= FLAG_TOP_DIR | FLAG_CONTENT_DIR;
1014                 } else if (in_del_hier) {
1015                         if (!relative_paths || !del_hier_name_len
1016                          || (l1 >= del_hier_name_len
1017                           && lastname[del_hier_name_len] == '/'))
1018                                 file->flags |= FLAG_CONTENT_DIR;
1019                         else
1020                                 in_del_hier = 0;
1021                 }
1022         }
1023
1024         if (preserve_devices && IS_DEVICE(mode)) {
1025                 uint32 *devp = F_RDEV_P(file);
1026                 DEV_MAJOR(devp) = major(rdev);
1027                 DEV_MINOR(devp) = minor(rdev);
1028         }
1029
1030 #ifdef SUPPORT_LINKS
1031         if (linkname_len) {
1032                 bp += basename_len;
1033                 if (first_hlink_ndx >= flist->ndx_start) {
1034                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
1035                         memcpy(bp, F_SYMLINK(first), linkname_len);
1036                 } else {
1037                         if (munge_symlinks) {
1038                                 strlcpy(bp, SYMLINK_PREFIX, linkname_len);
1039                                 bp += SYMLINK_PREFIX_LEN;
1040                                 linkname_len -= SYMLINK_PREFIX_LEN;
1041                         }
1042 #ifdef ICONV_OPTION
1043                         if (sender_symlink_iconv) {
1044                                 xbuf outbuf, inbuf;
1045
1046                                 alloc_len = linkname_len;
1047                                 linkname_len /= 2;
1048
1049                                 /* Read the symlink data into the end of our double-sized
1050                                  * buffer and then convert it into the right spot. */
1051                                 INIT_XBUF(inbuf, bp + alloc_len - linkname_len,
1052                                           linkname_len - 1, (size_t)-1);
1053                                 read_sbuf(f, inbuf.buf, inbuf.len);
1054                                 INIT_XBUF(outbuf, bp, 0, alloc_len);
1055
1056                                 if (iconvbufs(ic_recv, &inbuf, &outbuf, 0) < 0) {
1057                                         io_error |= IOERR_GENERAL;
1058                                         rprintf(FERROR_XFER,
1059                                             "[%s] cannot convert symlink data for: %s (%s)\n",
1060                                             who_am_i(), full_fname(thisname), strerror(errno));
1061                                         bp = (char*)file->basename;
1062                                         *bp++ = '\0';
1063                                         outbuf.len = 0;
1064                                 }
1065                                 bp[outbuf.len] = '\0';
1066                         } else
1067 #endif
1068                                 read_sbuf(f, bp, linkname_len - 1);
1069                         if (sanitize_paths && !munge_symlinks && *bp)
1070                                 sanitize_path(bp, bp, "", lastdir_depth, SP_DEFAULT);
1071                 }
1072         }
1073 #endif
1074
1075 #ifdef SUPPORT_HARD_LINKS
1076         if (preserve_hard_links && xflags & XMIT_HLINKED) {
1077                 if (protocol_version >= 30) {
1078                         if (xflags & XMIT_HLINK_FIRST) {
1079                                 F_HL_GNUM(file) = flist->ndx_start + flist->used;
1080                         } else
1081                                 F_HL_GNUM(file) = first_hlink_ndx;
1082                 } else {
1083                         static int32 cnt = 0;
1084                         struct ht_int64_node *np;
1085                         int64 ino;
1086                         int32 ndx;
1087                         if (protocol_version < 26) {
1088                                 dev = read_int(f);
1089                                 ino = read_int(f);
1090                         } else {
1091                                 if (!(xflags & XMIT_SAME_DEV_pre30))
1092                                         dev = read_longint(f);
1093                                 ino = read_longint(f);
1094                         }
1095                         np = idev_find(dev, ino);
1096                         ndx = (int32)(long)np->data - 1;
1097                         if (ndx < 0) {
1098                                 ndx = cnt++;
1099                                 np->data = (void*)(long)cnt;
1100                         }
1101                         F_HL_GNUM(file) = ndx;
1102                 }
1103         }
1104 #endif
1105
1106         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
1107                 if (S_ISREG(mode))
1108                         bp = F_SUM(file);
1109                 else {
1110                         /* Prior to 28, we get a useless set of nulls. */
1111                         bp = tmp_sum;
1112                 }
1113                 if (first_hlink_ndx >= flist->ndx_start) {
1114                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
1115                         memcpy(bp, F_SUM(first), checksum_len);
1116                 } else
1117                         read_buf(f, bp, checksum_len);
1118         }
1119
1120 #ifdef SUPPORT_ACLS
1121         if (preserve_acls && !S_ISLNK(mode))
1122                 receive_acl(f, file);
1123 #endif
1124 #ifdef SUPPORT_XATTRS
1125         if (preserve_xattrs)
1126                 receive_xattr(f, file);
1127 #endif
1128
1129         if (S_ISREG(mode) || S_ISLNK(mode))
1130                 stats.total_size += file_length;
1131
1132         return file;
1133 }
1134
1135 /* Create a file_struct for a named file by reading its stat() information
1136  * and performing extensive checks against global options.
1137  *
1138  * If we're the sender and --copy-unsafe-links is on, we want to consider a
1139  * symlink unsafe if it leaves the subtree established by another unsafe
1140  * symlink, but that can't be determined based on "fname".  So the depth of
1141  * real directories since the last unsafe symlink is passed as "phys_depth".
1142  * In other cases, "phys_depth" is ignored.
1143  *
1144  * Returns a pointer to the new file struct, or NULL if there was an error
1145  * or this file should be excluded.
1146  *
1147  * Note: Any error (here or in send_file_name) that results in the omission of
1148  * an existent source file from the file list should set
1149  * "io_error |= IOERR_GENERAL" to avoid deletion of the file from the
1150  * destination if --delete is on. */
1151 struct file_struct *make_file(const char *fname, struct file_list *flist,
1152                               STRUCT_STAT *stp, int flags, int filter_level,
1153                               unsigned int phys_depth)
1154 {
1155         static char *lastdir;
1156         static int lastdir_len = -1;
1157         struct file_struct *file;
1158         char thisname[MAXPATHLEN];
1159         char linkname[MAXPATHLEN];
1160         int alloc_len, basename_len, linkname_len;
1161         int extra_len = file_extra_cnt * EXTRA_LEN;
1162         const char *basename;
1163         alloc_pool_t *pool;
1164         STRUCT_STAT st;
1165         char *bp;
1166
1167         if (strlcpy(thisname, fname, sizeof thisname) >= sizeof thisname) {
1168                 io_error |= IOERR_GENERAL;
1169                 rprintf(FERROR_XFER, "skipping overly long name: %s\n", fname);
1170                 return NULL;
1171         }
1172         clean_fname(thisname, 0);
1173         if (sanitize_paths)
1174                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
1175
1176         if (stp && (S_ISDIR(stp->st_mode) || stp->st_mode == 0)) {
1177                 /* This is needed to handle a "symlink/." with a --relative
1178                  * dir, or a request to delete a specific file. */
1179                 st = *stp;
1180                 *linkname = '\0'; /* make IBM code checker happy */
1181         } else if (readlink_stat(thisname, &st, linkname, &phys_depth) != 0) {
1182                 int save_errno = errno;
1183                 /* See if file is excluded before reporting an error. */
1184                 if (filter_level != NO_FILTERS
1185                  && (is_excluded(thisname, 0, filter_level)
1186                   || is_excluded(thisname, 1, filter_level))) {
1187                         if (ignore_perishable && save_errno != ENOENT)
1188                                 non_perishable_cnt++;
1189                         return NULL;
1190                 }
1191                 if (save_errno == ENOENT) {
1192 #ifdef SUPPORT_LINKS
1193                         /* When our options tell us to follow a symlink that
1194                          * points nowhere, tell the user about the symlink
1195                          * instead of giving a "vanished" message.  We only
1196                          * dereference a symlink if one of the --copy*links
1197                          * options was specified, so there's no need for the
1198                          * extra lstat() if one of these options isn't on. */
1199                         if ((copy_links || copy_unsafe_links || copy_dirlinks)
1200                          && x_lstat(thisname, &st, NULL) == 0
1201                          && S_ISLNK(st.st_mode)) {
1202                                 io_error |= IOERR_GENERAL;
1203                                 rprintf(FERROR_XFER, "symlink has no referent: %s\n",
1204                                         full_fname(thisname));
1205                         } else
1206 #endif
1207                         {
1208                                 enum logcode c = am_daemon && protocol_version < 28
1209                                                ? FERROR : FWARNING;
1210                                 io_error |= IOERR_VANISHED;
1211                                 rprintf(c, "file has vanished: %s\n",
1212                                         full_fname(thisname));
1213                         }
1214                 } else {
1215                         io_error |= IOERR_GENERAL;
1216                         rsyserr(FERROR_XFER, save_errno, "readlink_stat(%s) failed",
1217                                 full_fname(thisname));
1218                 }
1219                 return NULL;
1220         } else if (st.st_mode == 0) {
1221                 io_error |= IOERR_GENERAL;
1222                 rprintf(FINFO, "skipping file with bogus (zero) st_mode: %s\n",
1223                         full_fname(thisname));
1224                 return NULL;
1225         }
1226
1227         if (filter_level == NO_FILTERS)
1228                 goto skip_filters;
1229
1230         if (S_ISDIR(st.st_mode)) {
1231                 if (!xfer_dirs) {
1232                         rprintf(FINFO, "skipping directory %s\n", thisname);
1233                         return NULL;
1234                 }
1235                 /* -x only affects dirs because we need to avoid recursing
1236                  * into a mount-point directory, not to avoid copying a
1237                  * symlinked file if -L (or similar) was specified. */
1238                 if (one_file_system && st.st_dev != filesystem_dev
1239                  && BITS_SETnUNSET(flags, FLAG_CONTENT_DIR, FLAG_TOP_DIR)) {
1240                         if (one_file_system > 1) {
1241                                 if (INFO_GTE(MOUNT, 1)) {
1242                                         rprintf(FINFO,
1243                                             "[%s] skipping mount-point dir %s\n",
1244                                             who_am_i(), thisname);
1245                                 }
1246                                 return NULL;
1247                         }
1248                         flags |= FLAG_MOUNT_DIR;
1249                         flags &= ~FLAG_CONTENT_DIR;
1250                 }
1251         } else
1252                 flags &= ~FLAG_CONTENT_DIR;
1253
1254         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level)) {
1255                 if (ignore_perishable)
1256                         non_perishable_cnt++;
1257                 return NULL;
1258         }
1259
1260         if (lp_ignore_nonreadable(module_id)) {
1261 #ifdef SUPPORT_LINKS
1262                 if (!S_ISLNK(st.st_mode))
1263 #endif
1264                         if (access(thisname, R_OK) != 0)
1265                                 return NULL;
1266         }
1267
1268   skip_filters:
1269
1270         /* Only divert a directory in the main transfer. */
1271         if (flist) {
1272                 if (flist->prev && S_ISDIR(st.st_mode)
1273                  && flags & FLAG_DIVERT_DIRS) {
1274                         /* Room for parent/sibling/next-child info. */
1275                         extra_len += DIRNODE_EXTRA_CNT * EXTRA_LEN;
1276                         if (relative_paths)
1277                                 extra_len += PTR_EXTRA_CNT * EXTRA_LEN;
1278                         pool = dir_flist->file_pool;
1279                 } else
1280                         pool = flist->file_pool;
1281         } else {
1282 #ifdef SUPPORT_ACLS
1283                 /* Directories need an extra int32 for the default ACL. */
1284                 if (preserve_acls && S_ISDIR(st.st_mode))
1285                         extra_len += EXTRA_LEN;
1286 #endif
1287                 pool = NULL;
1288         }
1289
1290         if (DEBUG_GTE(FLIST, 2)) {
1291                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
1292                         who_am_i(), thisname, filter_level);
1293         }
1294
1295         if ((basename = strrchr(thisname, '/')) != NULL) {
1296                 int len = basename++ - thisname;
1297                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
1298                         lastdir = new_array(char, len + 1);
1299                         memcpy(lastdir, thisname, len);
1300                         lastdir[len] = '\0';
1301                         lastdir_len = len;
1302                 }
1303         } else
1304                 basename = thisname;
1305         basename_len = strlen(basename) + 1; /* count the '\0' */
1306
1307 #ifdef SUPPORT_LINKS
1308         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
1309 #else
1310         linkname_len = 0;
1311 #endif
1312
1313 #ifdef ST_MTIME_NSEC
1314         if (st.ST_MTIME_NSEC && protocol_version >= 31)
1315                 extra_len += EXTRA_LEN;
1316 #endif
1317 #if SIZEOF_CAPITAL_OFF_T >= 8
1318         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
1319                 extra_len += EXTRA_LEN;
1320 #endif
1321
1322         if (always_checksum && am_sender && S_ISREG(st.st_mode)) {
1323                 file_checksum(thisname, tmp_sum, st.st_size);
1324                 if (sender_keeps_checksum)
1325                         extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
1326         }
1327
1328         if (copy_unsafe_links && S_ISDIR(st.st_mode))
1329                 extra_len += EXTRA_LEN; // F_DIR_PHYS_DEPTH
1330
1331 #if EXTRA_ROUNDING > 0
1332         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
1333                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
1334 #endif
1335
1336         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
1337                   + linkname_len;
1338         if (pool)
1339                 bp = pool_alloc(pool, alloc_len, "make_file");
1340         else {
1341                 if (!(bp = new_array(char, alloc_len)))
1342                         out_of_memory("make_file");
1343         }
1344
1345         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
1346         bp += extra_len;
1347         file = (struct file_struct *)bp;
1348         bp += FILE_STRUCT_LEN;
1349
1350         memcpy(bp, basename, basename_len);
1351
1352 #ifdef SUPPORT_HARD_LINKS
1353         if (preserve_hard_links && flist && flist->prev) {
1354                 if (protocol_version >= 28
1355                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
1356                  : S_ISREG(st.st_mode)) {
1357                         tmp_dev = (int64)st.st_dev + 1;
1358                         tmp_ino = (int64)st.st_ino;
1359                 } else
1360                         tmp_dev = 0;
1361         }
1362 #endif
1363
1364 #ifdef HAVE_STRUCT_STAT_ST_RDEV
1365         if (IS_DEVICE(st.st_mode)) {
1366                 tmp_rdev = st.st_rdev;
1367                 st.st_size = 0;
1368         } else if (IS_SPECIAL(st.st_mode))
1369                 st.st_size = 0;
1370 #endif
1371
1372         file->flags = flags;
1373         file->modtime = st.st_mtime;
1374 #ifdef ST_MTIME_NSEC
1375         if (st.ST_MTIME_NSEC && protocol_version >= 31) {
1376                 file->flags |= FLAG_MOD_NSEC;
1377                 OPT_EXTRA(file, 0)->unum = st.ST_MTIME_NSEC;
1378         }
1379 #endif
1380         file->len32 = (uint32)st.st_size;
1381 #if SIZEOF_CAPITAL_OFF_T >= 8
1382         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
1383                 file->flags |= FLAG_LENGTH64;
1384                 OPT_EXTRA(file, NSEC_BUMP(file))->unum = (uint32)(st.st_size >> 32);
1385         }
1386 #endif
1387         file->mode = st.st_mode;
1388         if (uid_ndx) /* Check uid_ndx instead of preserve_uid for del support */
1389                 F_OWNER(file) = st.st_uid;
1390         if (gid_ndx) /* Check gid_ndx instead of preserve_gid for del support */
1391                 F_GROUP(file) = st.st_gid;
1392
1393         if (basename != thisname)
1394                 file->dirname = lastdir;
1395
1396 #ifdef SUPPORT_LINKS
1397         if (linkname_len)
1398                 memcpy(bp + basename_len, linkname, linkname_len);
1399 #endif
1400
1401         if (am_sender)
1402                 F_PATHNAME(file) = pathname;
1403         else if (!pool)
1404                 F_DEPTH(file) = extra_len / EXTRA_LEN;
1405
1406         if (basename_len == 0+1) {
1407                 if (!pool)
1408                         unmake_file(file);
1409                 return NULL;
1410         }
1411
1412         if (sender_keeps_checksum && S_ISREG(st.st_mode))
1413                 memcpy(F_SUM(file), tmp_sum, checksum_len);
1414
1415         if (copy_unsafe_links && S_ISDIR(st.st_mode))
1416                 F_DIR_PHYS_DEPTH(file) = phys_depth; /* as adjusted by readlink_stat */
1417
1418         if (unsort_ndx)
1419                 F_NDX(file) = stats.num_dirs;
1420
1421         return file;
1422 }
1423
1424 /* Only called for temporary file_struct entries created by make_file(). */
1425 void unmake_file(struct file_struct *file)
1426 {
1427         free(REQ_EXTRA(file, F_DEPTH(file)));
1428 }
1429
1430 static struct file_struct *send_file_name(int f, struct file_list *flist,
1431                                           const char *fname, STRUCT_STAT *stp,
1432                                           int flags, int filter_level,
1433                                           unsigned int phys_depth)
1434 {
1435         struct file_struct *file;
1436
1437         file = make_file(fname, flist, stp, flags, filter_level, phys_depth);
1438         if (!file)
1439                 return NULL;
1440
1441         if (chmod_modes && !S_ISLNK(file->mode) && file->mode)
1442                 file->mode = tweak_mode(file->mode, chmod_modes);
1443
1444         if (f >= 0) {
1445                 char fbuf[MAXPATHLEN];
1446 #ifdef SUPPORT_LINKS
1447                 const char *symlink_name;
1448                 int symlink_len;
1449 #ifdef ICONV_OPTION
1450                 char symlink_buf[MAXPATHLEN];
1451 #endif
1452 #endif
1453 #if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
1454                 stat_x sx;
1455                 init_stat_x(&sx);
1456 #endif
1457
1458 #ifdef SUPPORT_LINKS
1459                 if (preserve_links && S_ISLNK(file->mode)) {
1460                         symlink_name = F_SYMLINK(file);
1461                         symlink_len = strlen(symlink_name);
1462                         if (symlink_len == 0) {
1463                                 io_error |= IOERR_GENERAL;
1464                                 f_name(file, fbuf);
1465                                 rprintf(FERROR_XFER,
1466                                     "skipping symlink with 0-length value: %s\n",
1467                                     full_fname(fbuf));
1468                                 return NULL;
1469                         }
1470                 } else {
1471                         symlink_name = NULL;
1472                         symlink_len = 0;
1473                 }
1474 #endif
1475
1476 #ifdef ICONV_OPTION
1477                 if (ic_send != (iconv_t)-1) {
1478                         xbuf outbuf, inbuf;
1479
1480                         INIT_CONST_XBUF(outbuf, fbuf);
1481
1482                         if (file->dirname) {
1483                                 INIT_XBUF_STRLEN(inbuf, (char*)file->dirname);
1484                                 outbuf.size -= 2; /* Reserve room for '/' & 1 more char. */
1485                                 if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0)
1486                                         goto convert_error;
1487                                 outbuf.size += 2;
1488                                 fbuf[outbuf.len++] = '/';
1489                         }
1490
1491                         INIT_XBUF_STRLEN(inbuf, (char*)file->basename);
1492                         if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0) {
1493                           convert_error:
1494                                 io_error |= IOERR_GENERAL;
1495                                 rprintf(FERROR_XFER,
1496                                     "[%s] cannot convert filename: %s (%s)\n",
1497                                     who_am_i(), f_name(file, fbuf), strerror(errno));
1498                                 return NULL;
1499                         }
1500                         fbuf[outbuf.len] = '\0';
1501
1502 #ifdef SUPPORT_LINKS
1503                         if (symlink_len && sender_symlink_iconv) {
1504                                 INIT_XBUF(inbuf, (char*)symlink_name, symlink_len, (size_t)-1);
1505                                 INIT_CONST_XBUF(outbuf, symlink_buf);
1506                                 if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0) {
1507                                         io_error |= IOERR_GENERAL;
1508                                         f_name(file, fbuf);
1509                                         rprintf(FERROR_XFER,
1510                                             "[%s] cannot convert symlink data for: %s (%s)\n",
1511                                             who_am_i(), full_fname(fbuf), strerror(errno));
1512                                         return NULL;
1513                                 }
1514                                 symlink_buf[outbuf.len] = '\0';
1515
1516                                 symlink_name = symlink_buf;
1517                                 symlink_len = outbuf.len;
1518                         }
1519 #endif
1520                 } else
1521 #endif
1522                         f_name(file, fbuf);
1523
1524 #ifdef SUPPORT_ACLS
1525                 if (preserve_acls && !S_ISLNK(file->mode)) {
1526                         sx.st.st_mode = file->mode;
1527                         if (get_acl(fname, &sx) < 0) {
1528                                 io_error |= IOERR_GENERAL;
1529                                 return NULL;
1530                         }
1531                 }
1532 #endif
1533 #ifdef SUPPORT_XATTRS
1534                 if (preserve_xattrs) {
1535                         sx.st.st_mode = file->mode;
1536                         if (get_xattr(fname, &sx) < 0) {
1537                                 io_error |= IOERR_GENERAL;
1538                                 return NULL;
1539                         }
1540                 }
1541 #endif
1542
1543                 send_file_entry(f, fbuf, file,
1544 #ifdef SUPPORT_LINKS
1545                                 symlink_name, symlink_len,
1546 #endif
1547                                 flist->used, flist->ndx_start);
1548
1549 #ifdef SUPPORT_ACLS
1550                 if (preserve_acls && !S_ISLNK(file->mode)) {
1551                         send_acl(f, &sx);
1552                         free_acl(&sx);
1553                 }
1554 #endif
1555 #ifdef SUPPORT_XATTRS
1556                 if (preserve_xattrs) {
1557                         F_XATTR(file) = send_xattr(f, &sx);
1558                         free_xattr(&sx);
1559                 }
1560 #endif
1561         }
1562
1563         maybe_emit_filelist_progress(flist->used + flist_count_offset);
1564
1565         flist_expand(flist, 1);
1566         flist->files[flist->used++] = file;
1567
1568         return file;
1569 }
1570
1571 static void send_if_directory(int f, struct file_list *flist,
1572                               struct file_struct *file,
1573                               char *fbuf, unsigned int ol,
1574                               int flags)
1575 {
1576         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1577
1578         if (S_ISDIR(file->mode)
1579             && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) {
1580                 void *save_filters;
1581                 unsigned int len = strlen(fbuf);
1582                 if (len > 1 && fbuf[len-1] == '/')
1583                         fbuf[--len] = '\0';
1584                 if (len >= MAXPATHLEN - 1) {
1585                         io_error |= IOERR_GENERAL;
1586                         rprintf(FERROR_XFER, "skipping long-named directory: %s\n",
1587                                 full_fname(fbuf));
1588                         return;
1589                 }
1590                 save_filters = push_local_filters(fbuf, len);
1591                 send_directory(f, flist, fbuf, len, flags, F_DIR_PHYS_DEPTH(file));
1592                 pop_local_filters(save_filters);
1593                 fbuf[ol] = '\0';
1594                 if (is_dot_dir)
1595                         fbuf[ol-1] = '.';
1596         }
1597 }
1598
1599 static int file_compare(const void *file1, const void *file2)
1600 {
1601         return f_name_cmp(*(struct file_struct **)file1,
1602                           *(struct file_struct **)file2);
1603 }
1604
1605 /* The guts of a merge-sort algorithm.  This was derived from the glibc
1606  * version, but I (Wayne) changed the merge code to do less copying and
1607  * to require only half the amount of temporary memory. */
1608 static void fsort_tmp(struct file_struct **fp, size_t num,
1609                       struct file_struct **tmp)
1610 {
1611         struct file_struct **f1, **f2, **t;
1612         size_t n1, n2;
1613
1614         n1 = num / 2;
1615         n2 = num - n1;
1616         f1 = fp;
1617         f2 = fp + n1;
1618
1619         if (n1 > 1)
1620                 fsort_tmp(f1, n1, tmp);
1621         if (n2 > 1)
1622                 fsort_tmp(f2, n2, tmp);
1623
1624         while (f_name_cmp(*f1, *f2) <= 0) {
1625                 if (!--n1)
1626                         return;
1627                 f1++;
1628         }
1629
1630         t = tmp;
1631         memcpy(t, f1, n1 * PTR_SIZE);
1632
1633         *f1++ = *f2++, n2--;
1634
1635         while (n1 > 0 && n2 > 0) {
1636                 if (f_name_cmp(*t, *f2) <= 0)
1637                         *f1++ = *t++, n1--;
1638                 else
1639                         *f1++ = *f2++, n2--;
1640         }
1641
1642         if (n1 > 0)
1643                 memcpy(f1, t, n1 * PTR_SIZE);
1644 }
1645
1646 /* This file-struct sorting routine makes sure that any identical names in
1647  * the file list stay in the same order as they were in the original list.
1648  * This is particularly vital in inc_recurse mode where we expect a sort
1649  * on the flist to match the exact order of a sort on the dir_flist. */
1650 static void fsort(struct file_struct **fp, size_t num)
1651 {
1652         if (num <= 1)
1653                 return;
1654
1655         if (use_qsort)
1656                 qsort(fp, num, PTR_SIZE, file_compare);
1657         else {
1658                 struct file_struct **tmp = new_array(struct file_struct *,
1659                                                      (num+1) / 2);
1660                 fsort_tmp(fp, num, tmp);
1661                 free(tmp);
1662         }
1663 }
1664
1665 /* We take an entire set of sibling dirs from the sorted flist and link them
1666  * into the tree, setting the appropriate parent/child/sibling pointers. */
1667 static void add_dirs_to_tree(int parent_ndx, struct file_list *from_flist,
1668                              int dir_cnt)
1669 {
1670         int i;
1671         int32 *dp = NULL;
1672         int32 *parent_dp = parent_ndx < 0 ? NULL
1673                          : F_DIR_NODE_P(dir_flist->sorted[parent_ndx]);
1674
1675         flist_expand(dir_flist, dir_cnt);
1676         dir_flist->sorted = dir_flist->files;
1677
1678         for (i = 0; dir_cnt; i++) {
1679                 struct file_struct *file = from_flist->sorted[i];
1680
1681                 if (!S_ISDIR(file->mode))
1682                         continue;
1683
1684                 dir_flist->files[dir_flist->used++] = file;
1685                 dir_cnt--;
1686
1687                 if (file->basename[0] == '.' && file->basename[1] == '\0')
1688                         continue;
1689
1690                 if (dp)
1691                         DIR_NEXT_SIBLING(dp) = dir_flist->used - 1;
1692                 else if (parent_dp)
1693                         DIR_FIRST_CHILD(parent_dp) = dir_flist->used - 1;
1694                 else
1695                         send_dir_ndx = dir_flist->used - 1;
1696
1697                 dp = F_DIR_NODE_P(file);
1698                 DIR_PARENT(dp) = parent_ndx;
1699                 DIR_FIRST_CHILD(dp) = -1;
1700         }
1701         if (dp)
1702                 DIR_NEXT_SIBLING(dp) = -1;
1703 }
1704
1705 static void interpret_stat_error(const char *fname, int is_dir)
1706 {
1707         if (errno == ENOENT) {
1708                 io_error |= IOERR_VANISHED;
1709                 rprintf(FWARNING, "%s has vanished: %s\n",
1710                         is_dir ? "directory" : "file", full_fname(fname));
1711         } else {
1712                 io_error |= IOERR_GENERAL;
1713                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1714                         full_fname(fname));
1715         }
1716 }
1717
1718 /* This function is normally called by the sender, but the receiving side also
1719  * calls it from get_dirlist() with f set to -1 so that we just construct the
1720  * file list in memory without sending it over the wire.  Also, get_dirlist()
1721  * might call this with f set to -2, which also indicates that local filter
1722  * rules should be ignored. */
1723 static void send_directory(int f, struct file_list *flist, char *fbuf, int len,
1724                            int flags, unsigned int phys_depth)
1725 {
1726         struct dirent *di;
1727         unsigned remainder;
1728         char *p;
1729         DIR *d;
1730         int divert_dirs = (flags & FLAG_DIVERT_DIRS) != 0;
1731         int start = flist->used;
1732         int filter_level = f == -2 ? SERVER_FILTERS : ALL_FILTERS;
1733
1734         assert(flist != NULL);
1735
1736         if (!(d = opendir(fbuf))) {
1737                 if (errno == ENOENT) {
1738                         if (am_sender) /* Can abuse this for vanished error w/ENOENT: */
1739                                 interpret_stat_error(fbuf, True);
1740                         return;
1741                 }
1742                 io_error |= IOERR_GENERAL;
1743                 rsyserr(FERROR_XFER, errno, "opendir %s failed", full_fname(fbuf));
1744                 return;
1745         }
1746
1747         p = fbuf + len;
1748         if (len != 1 || *fbuf != '/')
1749                 *p++ = '/';
1750         *p = '\0';
1751         remainder = MAXPATHLEN - (p - fbuf);
1752
1753         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1754                 char *dname = d_name(di);
1755                 if (dname[0] == '.' && (dname[1] == '\0'
1756                     || (dname[1] == '.' && dname[2] == '\0')))
1757                         continue;
1758                 if (strlcpy(p, dname, remainder) >= remainder) {
1759                         io_error |= IOERR_GENERAL;
1760                         rprintf(FERROR_XFER,
1761                                 "cannot send long-named file %s\n",
1762                                 full_fname(fbuf));
1763                         continue;
1764                 }
1765                 if (dname[0] == '\0') {
1766                         io_error |= IOERR_GENERAL;
1767                         rprintf(FERROR_XFER,
1768                                 "cannot send file with empty name in %s\n",
1769                                 full_fname(fbuf));
1770                         continue;
1771                 }
1772
1773                 send_file_name(f, flist, fbuf, NULL, flags, filter_level, phys_depth);
1774         }
1775
1776         fbuf[len] = '\0';
1777
1778         if (errno) {
1779                 io_error |= IOERR_GENERAL;
1780                 rsyserr(FERROR_XFER, errno, "readdir(%s)", full_fname(fbuf));
1781         }
1782
1783         closedir(d);
1784
1785         if (f >= 0 && recurse && !divert_dirs) {
1786                 int i, end = flist->used - 1;
1787                 /* send_if_directory() bumps flist->used, so use "end". */
1788                 for (i = start; i <= end; i++)
1789                         send_if_directory(f, flist, flist->files[i], fbuf, len, flags);
1790         }
1791 }
1792
1793 /* Used in a few places where we need to pass a phys_depth but can't easily
1794  * determine what it should be.  FIXME! */
1795 #define FIXME_path_depth path_depth
1796
1797 static void send_implied_dirs(int f, struct file_list *flist, char *fname,
1798                               char *start, char *limit, int flags, char name_type)
1799 {
1800         static char lastpath[MAXPATHLEN] = "";
1801         static int lastpath_len = 0;
1802         static struct file_struct *lastpath_struct = NULL;
1803         struct file_struct *file;
1804         item_list *relname_list;
1805         relnamecache **rnpp;
1806         int len, need_new_dir, depth = 0;
1807         filter_rule_list save_filter_list = filter_list;
1808
1809         flags = (flags | FLAG_IMPLIED_DIR) & ~(FLAG_TOP_DIR | FLAG_CONTENT_DIR);
1810         filter_list.head = filter_list.tail = NULL; /* Don't filter implied dirs. */
1811
1812         if (inc_recurse) {
1813                 if (lastpath_struct && F_PATHNAME(lastpath_struct) == pathname
1814                  && lastpath_len == limit - fname
1815                  && strncmp(lastpath, fname, lastpath_len) == 0)
1816                         need_new_dir = 0;
1817                 else
1818                         need_new_dir = 1;
1819         } else {
1820                 char *tp = fname, *lp = lastpath;
1821                 /* Skip any initial directories in our path that we
1822                  * have in common with lastpath. */
1823                 assert(start == fname);
1824                 for ( ; ; tp++, lp++) {
1825                         if (tp == limit) {
1826                                 if (*lp == '/' || *lp == '\0')
1827                                         goto done;
1828                                 break;
1829                         }
1830                         if (*lp != *tp)
1831                                 break;
1832                         if (*tp == '/') {
1833                                 start = tp;
1834                                 depth++;
1835                         }
1836                 }
1837                 need_new_dir = 1;
1838         }
1839
1840         if (need_new_dir) {
1841                 int save_copy_links = copy_links;
1842                 int save_xfer_dirs = xfer_dirs;
1843                 char *slash;
1844
1845                 copy_links = xfer_dirs = 1;
1846
1847                 *limit = '\0';
1848
1849                 for (slash = start; (slash = strchr(slash+1, '/')) != NULL; ) {
1850                         *slash = '\0';
1851                         file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS,
1852                                               FIXME_path_depth(fname));
1853                         depth++;
1854                         if (!inc_recurse && file && S_ISDIR(file->mode))
1855                                 change_local_filter_dir(fname, strlen(fname), depth);
1856                         *slash = '/';
1857                 }
1858
1859                 file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS,
1860                                       FIXME_path_depth(fname));
1861                 if (inc_recurse) {
1862                         if (file && !S_ISDIR(file->mode))
1863                                 file = NULL;
1864                         lastpath_struct = file;
1865                 } else if (file && S_ISDIR(file->mode))
1866                         change_local_filter_dir(fname, strlen(fname), ++depth);
1867
1868                 strlcpy(lastpath, fname, sizeof lastpath);
1869                 lastpath_len = limit - fname;
1870
1871                 *limit = '/';
1872
1873                 copy_links = save_copy_links;
1874                 xfer_dirs = save_xfer_dirs;
1875
1876                 if (!inc_recurse)
1877                         goto done;
1878         }
1879
1880         if (!lastpath_struct)
1881                 goto done; /* dir must have vanished */
1882
1883         len = strlen(limit+1);
1884         memcpy(&relname_list, F_DIR_RELNAMES_P(lastpath_struct), sizeof relname_list);
1885         if (!relname_list) {
1886                 if (!(relname_list = new0(item_list)))
1887                         out_of_memory("send_implied_dirs");
1888                 memcpy(F_DIR_RELNAMES_P(lastpath_struct), &relname_list, sizeof relname_list);
1889         }
1890         rnpp = EXPAND_ITEM_LIST(relname_list, relnamecache *, 32);
1891         if (!(*rnpp = (relnamecache*)new_array(char, sizeof (relnamecache) + len)))
1892                 out_of_memory("send_implied_dirs");
1893         (*rnpp)->name_type = name_type;
1894         strlcpy((*rnpp)->fname, limit+1, len + 1);
1895
1896 done:
1897         filter_list = save_filter_list;
1898 }
1899
1900 static void send1extra(int f, struct file_struct *file, struct file_list *flist)
1901 {
1902         char fbuf[MAXPATHLEN];
1903         item_list *relname_list;
1904         int len, dlen, flags = FLAG_DIVERT_DIRS | FLAG_CONTENT_DIR;
1905         size_t j;
1906
1907         f_name(file, fbuf);
1908         dlen = strlen(fbuf);
1909
1910         if (!change_pathname(file, NULL, 0))
1911                 exit_cleanup(RERR_FILESELECT);
1912
1913         change_local_filter_dir(fbuf, dlen, send_dir_depth);
1914
1915         if (file->flags & FLAG_CONTENT_DIR) {
1916                 if (one_file_system) {
1917                         STRUCT_STAT st;
1918                         if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1919                                 interpret_stat_error(fbuf, True);
1920                                 return;
1921                         }
1922                         filesystem_dev = st.st_dev;
1923                 }
1924                 send_directory(f, flist, fbuf, dlen, flags, F_DIR_PHYS_DEPTH(file));
1925         }
1926
1927         if (!relative_paths)
1928                 return;
1929
1930         memcpy(&relname_list, F_DIR_RELNAMES_P(file), sizeof relname_list);
1931         if (!relname_list)
1932                 return;
1933
1934         for (j = 0; j < relname_list->count; j++) {
1935                 char *slash;
1936                 relnamecache *rnp = ((relnamecache**)relname_list->items)[j];
1937                 char name_type = rnp->name_type;
1938
1939                 fbuf[dlen] = '/';
1940                 len = strlcpy(fbuf + dlen + 1, rnp->fname, sizeof fbuf - dlen - 1);
1941                 free(rnp);
1942                 if (len >= (int)sizeof fbuf)
1943                         continue; /* Impossible... */
1944
1945                 slash = strchr(fbuf+dlen+1, '/');
1946                 if (slash) {
1947                         send_implied_dirs(f, flist, fbuf, fbuf+dlen+1, slash, flags, name_type);
1948                         continue;
1949                 }
1950
1951                 if (name_type != NORMAL_NAME) {
1952                         STRUCT_STAT st;
1953                         if (link_stat(fbuf, &st, 1) != 0) {
1954                                 interpret_stat_error(fbuf, True);
1955                                 continue;
1956                         }
1957                         send_file_name(f, flist, fbuf, &st, FLAG_TOP_DIR | flags, ALL_FILTERS,
1958                                        FIXME_path_depth(fbuf));
1959                 } else
1960                         send_file_name(f, flist, fbuf, NULL, FLAG_TOP_DIR | flags, ALL_FILTERS,
1961                                        FIXME_path_depth(fbuf));
1962         }
1963
1964         free(relname_list);
1965 }
1966
1967 void send_extra_file_list(int f, int at_least)
1968 {
1969         struct file_list *flist;
1970         int64 start_write;
1971         uint16 prev_flags;
1972         int save_io_error = io_error;
1973
1974         if (flist_eof)
1975                 return;
1976
1977         if (at_least < 0)
1978                 at_least = file_total - file_old_total + 1;
1979
1980         /* Keep sending data until we have the requested number of
1981          * files in the upcoming file-lists. */
1982         while (file_total - file_old_total < at_least) {
1983                 struct file_struct *file = dir_flist->sorted[send_dir_ndx];
1984                 int dir_ndx, dstart = stats.num_dirs;
1985                 const char *pathname = F_PATHNAME(file);
1986                 int32 *dp;
1987
1988                 flist = flist_new(0, "send_extra_file_list");
1989                 start_write = stats.total_written;
1990
1991                 if (unsort_ndx)
1992                         dir_ndx = F_NDX(file);
1993                 else
1994                         dir_ndx = send_dir_ndx;
1995                 write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
1996                 flist->parent_ndx = dir_ndx;
1997
1998                 send1extra(f, file, flist);
1999                 prev_flags = file->flags;
2000                 dp = F_DIR_NODE_P(file);
2001
2002                 /* If there are any duplicate directory names that follow, we
2003                  * send all the dirs together in one file-list.  The dir_flist
2004                  * tree links all the child subdirs onto the last dup dir. */
2005                 while ((dir_ndx = DIR_NEXT_SIBLING(dp)) >= 0
2006                     && dir_flist->sorted[dir_ndx]->flags & FLAG_DUPLICATE) {
2007                         send_dir_ndx = dir_ndx;
2008                         file = dir_flist->sorted[dir_ndx];
2009                         /* Try to avoid some duplicate scanning of identical dirs. */
2010                         if (F_PATHNAME(file) == pathname && prev_flags & FLAG_CONTENT_DIR)
2011                                 file->flags &= ~FLAG_CONTENT_DIR;
2012                         send1extra(f, file, flist);
2013                         prev_flags = file->flags;
2014                         dp = F_DIR_NODE_P(file);
2015                 }
2016
2017                 if (protocol_version < 31 || io_error == save_io_error || ignore_errors)
2018                         write_byte(f, 0);
2019                 else {
2020                         write_shortint(f, XMIT_EXTENDED_FLAGS|XMIT_IO_ERROR_ENDLIST);
2021                         write_varint(f, io_error);
2022                 }
2023
2024                 if (need_unsorted_flist) {
2025                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2026                                 out_of_memory("send_extra_file_list");
2027                         memcpy(flist->sorted, flist->files,
2028                                flist->used * sizeof (struct file_struct*));
2029                 } else
2030                         flist->sorted = flist->files;
2031
2032                 flist_sort_and_clean(flist, 0);
2033
2034                 add_dirs_to_tree(send_dir_ndx, flist, stats.num_dirs - dstart);
2035                 flist_done_allocating(flist);
2036
2037                 file_total += flist->used;
2038                 stats.flist_size += stats.total_written - start_write;
2039                 stats.num_files += flist->used;
2040                 if (DEBUG_GTE(FLIST, 3))
2041                         output_flist(flist);
2042
2043                 if (DIR_FIRST_CHILD(dp) >= 0) {
2044                         send_dir_ndx = DIR_FIRST_CHILD(dp);
2045                         send_dir_depth++;
2046                 } else {
2047                         while (DIR_NEXT_SIBLING(dp) < 0) {
2048                                 if ((send_dir_ndx = DIR_PARENT(dp)) < 0) {
2049                                         write_ndx(f, NDX_FLIST_EOF);
2050                                         flist_eof = 1;
2051                                         change_local_filter_dir(NULL, 0, 0);
2052                                         goto finish;
2053                                 }
2054                                 send_dir_depth--;
2055                                 file = dir_flist->sorted[send_dir_ndx];
2056                                 dp = F_DIR_NODE_P(file);
2057                         }
2058                         send_dir_ndx = DIR_NEXT_SIBLING(dp);
2059                 }
2060         }
2061
2062   finish:
2063         if (io_error != save_io_error && protocol_version == 30 && !ignore_errors)
2064                 send_msg_int(MSG_IO_ERROR, io_error);
2065 }
2066
2067 struct file_list *send_file_list(int f, int argc, char *argv[])
2068 {
2069         static const char *lastdir;
2070         static int lastdir_len = -1;
2071         int len, dirlen;
2072         STRUCT_STAT st;
2073         char *p, *dir;
2074         struct file_list *flist;
2075         struct timeval start_tv, end_tv;
2076         int64 start_write;
2077         int use_ff_fd = 0;
2078         int disable_buffering;
2079         int flags = recurse ? FLAG_CONTENT_DIR : 0;
2080         int reading_remotely = filesfrom_host != NULL;
2081         int rl_flags = (reading_remotely ? 0 : RL_DUMP_COMMENTS)
2082 #ifdef ICONV_OPTION
2083                      | (filesfrom_convert ? RL_CONVERT : 0)
2084 #endif
2085                      | (eol_nulls || reading_remotely ? RL_EOL_NULLS : 0);
2086         int implied_dot_dir = 0;
2087
2088         rprintf(FLOG, "building file list\n");
2089         if (show_filelist_p())
2090                 start_filelist_progress("building file list");
2091         else if (inc_recurse && INFO_GTE(FLIST, 1) && !am_server)
2092                 rprintf(FCLIENT, "sending incremental file list\n");
2093
2094         start_write = stats.total_written;
2095         gettimeofday(&start_tv, NULL);
2096
2097         if (relative_paths && protocol_version >= 30)
2098                 implied_dirs = 1; /* We send flagged implied dirs */
2099
2100 #ifdef SUPPORT_HARD_LINKS
2101         if (preserve_hard_links && protocol_version >= 30 && !cur_flist)
2102                 init_hard_links();
2103 #endif
2104
2105         flist = cur_flist = flist_new(0, "send_file_list");
2106         if (inc_recurse) {
2107                 dir_flist = flist_new(FLIST_TEMP, "send_file_list");
2108                 flags |= FLAG_DIVERT_DIRS;
2109         } else
2110                 dir_flist = cur_flist;
2111
2112         disable_buffering = io_start_buffering_out(f);
2113         if (filesfrom_fd >= 0) {
2114                 if (argv[0] && !change_dir(argv[0], CD_NORMAL)) {
2115                         rsyserr(FERROR_XFER, errno, "change_dir %s failed",
2116                                 full_fname(argv[0]));
2117                         exit_cleanup(RERR_FILESELECT);
2118                 }
2119                 use_ff_fd = 1;
2120         }
2121
2122         if (!orig_dir)
2123                 orig_dir = strdup(curr_dir);
2124
2125         while (1) {
2126                 char fbuf[MAXPATHLEN], *fn, name_type;
2127
2128                 if (use_ff_fd) {
2129                         if (read_line(filesfrom_fd, fbuf, sizeof fbuf, rl_flags) == 0)
2130                                 break;
2131                         sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
2132                 } else {
2133                         if (argc-- == 0)
2134                                 break;
2135                         strlcpy(fbuf, *argv++, MAXPATHLEN);
2136                         if (sanitize_paths)
2137                                 sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
2138                 }
2139
2140                 len = strlen(fbuf);
2141                 if (relative_paths) {
2142                         /* We clean up fbuf below. */
2143                         name_type = NORMAL_NAME;
2144                 } else if (!len || fbuf[len - 1] == '/') {
2145                         if (len == 2 && fbuf[0] == '.') {
2146                                 /* Turn "./" into just "." rather than "./." */
2147                                 fbuf[--len] = '\0';
2148                         } else {
2149                                 if (len + 1 >= MAXPATHLEN)
2150                                         overflow_exit("send_file_list");
2151                                 fbuf[len++] = '.';
2152                                 fbuf[len] = '\0';
2153                         }
2154                         name_type = DOTDIR_NAME;
2155                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
2156                     && (len == 2 || fbuf[len-3] == '/')) {
2157                         if (len + 2 >= MAXPATHLEN)
2158                                 overflow_exit("send_file_list");
2159                         fbuf[len++] = '/';
2160                         fbuf[len++] = '.';
2161                         fbuf[len] = '\0';
2162                         name_type = DOTDIR_NAME;
2163                 } else if (fbuf[len-1] == '.' && (len == 1 || fbuf[len-2] == '/'))
2164                         name_type = DOTDIR_NAME;
2165                 else
2166                         name_type = NORMAL_NAME;
2167
2168                 dir = NULL;
2169
2170                 if (!relative_paths) {
2171                         p = strrchr(fbuf, '/');
2172                         if (p) {
2173                                 *p = '\0';
2174                                 if (p == fbuf)
2175                                         dir = "/";
2176                                 else
2177                                         dir = fbuf;
2178                                 len -= p - fbuf + 1;
2179                                 fn = p + 1;
2180                         } else
2181                                 fn = fbuf;
2182                 } else {
2183                         if ((p = strstr(fbuf, "/./")) != NULL) {
2184                                 *p = '\0';
2185                                 if (p == fbuf)
2186                                         dir = "/";
2187                                 else {
2188                                         dir = fbuf;
2189                                         clean_fname(dir, 0);
2190                                 }
2191                                 fn = p + 3;
2192                                 while (*fn == '/')
2193                                         fn++;
2194                                 if (!*fn)
2195                                         *--fn = '\0'; /* ensure room for '.' */
2196                         } else
2197                                 fn = fbuf;
2198                         /* A leading ./ can be used in relative mode to affect
2199                          * the dest dir without its name being in the path. */
2200                         if (*fn == '.' && fn[1] == '/' && !implied_dot_dir) {
2201                                 send_file_name(f, flist, ".", NULL,
2202                                     (flags | FLAG_IMPLIED_DIR) & ~FLAG_CONTENT_DIR,
2203                                     ALL_FILTERS, 0);
2204                                 implied_dot_dir = 1;
2205                         }
2206                         len = clean_fname(fn, CFN_KEEP_TRAILING_SLASH
2207                                             | CFN_DROP_TRAILING_DOT_DIR);
2208                         if (len == 1) {
2209                                 if (fn[0] == '/') {
2210                                         fn = "/.";
2211                                         len = 2;
2212                                         name_type = DOTDIR_NAME;
2213                                 } else if (fn[0] == '.')
2214                                         name_type = DOTDIR_NAME;
2215                         } else if (fn[len-1] == '/') {
2216                                 fn[--len] = '\0';
2217                                 if (len == 1 && *fn == '.')
2218                                         name_type = DOTDIR_NAME;
2219                                 else
2220                                         name_type = SLASH_ENDING_NAME;
2221                         }
2222                         /* Reject a ".." dir in the active part of the path. */
2223                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
2224                                 if ((p[2] == '/' || p[2] == '\0')
2225                                  && (p == fn || p[-1] == '/')) {
2226                                         rprintf(FERROR,
2227                                             "found \"..\" dir in relative path: %s\n",
2228                                             fn);
2229                                         exit_cleanup(RERR_SYNTAX);
2230                                 }
2231                         }
2232                 }
2233
2234                 if (!*fn) {
2235                         len = 1;
2236                         fn = ".";
2237                         name_type = DOTDIR_NAME;
2238                 }
2239
2240                 dirlen = dir ? strlen(dir) : 0;
2241                 if (dirlen != lastdir_len || memcmp(lastdir, dir, dirlen) != 0) {
2242                         if (!change_pathname(NULL, dir, -dirlen))
2243                                 continue;
2244                         lastdir = pathname;
2245                         lastdir_len = pathname_len;
2246                 } else if (!change_pathname(NULL, lastdir, lastdir_len))
2247                         continue;
2248
2249                 if (fn != fbuf)
2250                         memmove(fbuf, fn, len + 1);
2251
2252                 if (link_stat(fbuf, &st, copy_dirlinks || name_type != NORMAL_NAME) != 0
2253                  || (name_type != DOTDIR_NAME && is_daemon_excluded(fbuf, S_ISDIR(st.st_mode)))
2254                  || (relative_paths && path_is_daemon_excluded(fbuf, 1))) {
2255                         if (errno != ENOENT || missing_args == 0) {
2256                                 /* This is a transfer error, but inhibit deletion
2257                                  * only if we might be omitting an existing file. */
2258                                 if (errno != ENOENT)
2259                                         io_error |= IOERR_GENERAL;
2260                                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
2261                                         full_fname(fbuf));
2262                                 continue;
2263                         } else if (missing_args == 1) {
2264                                 /* Just ignore the arg. */
2265                                 continue;
2266                         } else /* (missing_args == 2) */ {
2267                                 /* Send the arg as a "missing" entry with
2268                                  * mode 0, which tells the generator to delete it. */
2269                                 memset(&st, 0, sizeof st);
2270                         }
2271                 }
2272
2273                 /* A dot-dir should not be excluded! */
2274                 if (name_type != DOTDIR_NAME && st.st_mode != 0
2275                  && is_excluded(fbuf, S_ISDIR(st.st_mode) != 0, ALL_FILTERS))
2276                         continue;
2277
2278                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
2279                         rprintf(FINFO, "skipping directory %s\n", fbuf);
2280                         continue;
2281                 }
2282
2283                 if (inc_recurse && relative_paths && *fbuf) {
2284                         if ((p = strchr(fbuf+1, '/')) != NULL) {
2285                                 if (p - fbuf == 1 && *fbuf == '.') {
2286                                         if ((fn = strchr(p+1, '/')) != NULL)
2287                                                 p = fn;
2288                                 } else
2289                                         fn = p;
2290                                 send_implied_dirs(f, flist, fbuf, fbuf, p, flags, name_type);
2291                                 if (fn == p)
2292                                         continue;
2293                         }
2294                 } else if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
2295                         /* Send the implied directories at the start of the
2296                          * source spec, so we get their permissions right. */
2297                         send_implied_dirs(f, flist, fbuf, fbuf, p, flags, 0);
2298                 }
2299
2300                 if (one_file_system)
2301                         filesystem_dev = st.st_dev;
2302
2303                 if (recurse || (xfer_dirs && name_type != NORMAL_NAME)) {
2304                         struct file_struct *file;
2305                         file = send_file_name(f, flist, fbuf, &st,
2306                                               FLAG_TOP_DIR | FLAG_CONTENT_DIR | flags,
2307                                               NO_FILTERS, FIXME_path_depth(fbuf));
2308                         if (!file)
2309                                 continue;
2310                         if (inc_recurse) {
2311                                 if (name_type == DOTDIR_NAME) {
2312                                         if (send_dir_depth < 0) {
2313                                                 send_dir_depth = 0;
2314                                                 change_local_filter_dir(fbuf, len, send_dir_depth);
2315                                         }
2316                                         send_directory(f, flist, fbuf, len, flags, F_DIR_PHYS_DEPTH(file));
2317                                 }
2318                         } else
2319                                 send_if_directory(f, flist, file, fbuf, len, flags);
2320                 } else
2321                         send_file_name(f, flist, fbuf, &st, flags, NO_FILTERS,
2322                                        FIXME_path_depth(fbuf));
2323         }
2324
2325         gettimeofday(&end_tv, NULL);
2326         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2327                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2328         if (stats.flist_buildtime == 0)
2329                 stats.flist_buildtime = 1;
2330         start_tv = end_tv;
2331
2332         /* Indicate end of file list */
2333         if (protocol_version < 31 || io_error == 0 || ignore_errors)
2334                 write_byte(f, 0);
2335         else {
2336                 write_shortint(f, XMIT_EXTENDED_FLAGS|XMIT_IO_ERROR_ENDLIST);
2337                 write_varint(f, io_error);
2338         }
2339
2340 #ifdef SUPPORT_HARD_LINKS
2341         if (preserve_hard_links && protocol_version >= 30 && !inc_recurse)
2342                 idev_destroy();
2343 #endif
2344
2345         if (show_filelist_p())
2346                 finish_filelist_progress(flist);
2347
2348         gettimeofday(&end_tv, NULL);
2349         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2350                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2351
2352         /* When converting names, both sides keep an unsorted file-list array
2353          * because the names will differ on the sending and receiving sides
2354          * (both sides will use the unsorted index number for each item). */
2355
2356         /* Sort the list without removing any duplicates.  This allows the
2357          * receiving side to ask for whatever name it kept.  For incremental
2358          * recursion mode, the sender marks duplicate dirs so that it can
2359          * send them together in a single file-list. */
2360         if (need_unsorted_flist) {
2361                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2362                         out_of_memory("send_file_list");
2363                 memcpy(flist->sorted, flist->files,
2364                        flist->used * sizeof (struct file_struct*));
2365         } else
2366                 flist->sorted = flist->files;
2367         flist_sort_and_clean(flist, 0);
2368         file_total += flist->used;
2369
2370         if (numeric_ids <= 0 && !inc_recurse)
2371                 send_id_list(f);
2372
2373         set_msg_fd_in(-1);
2374
2375         /* send the io_error flag */
2376         if (protocol_version < 30)
2377                 write_int(f, ignore_errors ? 0 : io_error);
2378         else if (io_error && protocol_version == 30 && !ignore_errors)
2379                 send_msg_int(MSG_IO_ERROR, io_error);
2380
2381         if (disable_buffering)
2382                 io_end_buffering_out();
2383
2384         stats.flist_size = stats.total_written - start_write;
2385         stats.num_files = flist->used;
2386
2387         if (DEBUG_GTE(FLIST, 3))
2388                 output_flist(flist);
2389
2390         if (DEBUG_GTE(FLIST, 2))
2391                 rprintf(FINFO, "send_file_list done\n");
2392
2393         if (inc_recurse) {
2394                 send_dir_depth = 1;
2395                 add_dirs_to_tree(-1, flist, stats.num_dirs);
2396                 if (!file_total || strcmp(flist->sorted[flist->low]->basename, ".") != 0)
2397                         flist->parent_ndx = -1;
2398                 flist_done_allocating(flist);
2399                 if (send_dir_ndx < 0) {
2400                         write_ndx(f, NDX_FLIST_EOF);
2401                         flist_eof = 1;
2402                 }
2403                 else if (file_total == 1) {
2404                         /* If we're creating incremental file-lists and there
2405                          * was just 1 item in the first file-list, send 1 more
2406                          * file-list to check if this is a 1-file xfer. */
2407                         send_extra_file_list(f, 1);
2408                 }
2409         } else
2410                 flist_eof = 1;
2411
2412         return flist;
2413 }
2414
2415 struct file_list *recv_file_list(int f)
2416 {
2417         struct file_list *flist;
2418         int dstart, flags;
2419         int64 start_read;
2420
2421         if (!first_flist) {
2422                 if (show_filelist_p())
2423                         start_filelist_progress("receiving file list");
2424                 else if (inc_recurse && INFO_GTE(FLIST, 1) && !am_server)
2425                         rprintf(FCLIENT, "receiving incremental file list\n");
2426                 rprintf(FLOG, "receiving file list\n");
2427                 if (usermap)
2428                         parse_name_map(usermap, True);
2429                 if (groupmap)
2430                         parse_name_map(groupmap, False);
2431         }
2432
2433         start_read = stats.total_read;
2434
2435 #ifdef SUPPORT_HARD_LINKS
2436         if (preserve_hard_links && !first_flist)
2437                 init_hard_links();
2438 #endif
2439
2440         flist = flist_new(0, "recv_file_list");
2441
2442         if (inc_recurse) {
2443                 if (flist->ndx_start == 1)
2444                         dir_flist = flist_new(FLIST_TEMP, "recv_file_list");
2445                 dstart = dir_flist->used;
2446         } else {
2447                 dir_flist = flist;
2448                 dstart = 0;
2449         }
2450
2451         while ((flags = read_byte(f)) != 0) {
2452                 struct file_struct *file;
2453
2454                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
2455                         flags |= read_byte(f) << 8;
2456
2457                 if (flags == (XMIT_EXTENDED_FLAGS|XMIT_IO_ERROR_ENDLIST)) {
2458                         int err;
2459                         if (protocol_version < 31) {
2460                                 rprintf(FERROR, "Invalid flist flag: %x\n", flags);
2461                                 exit_cleanup(RERR_PROTOCOL);
2462                         }
2463                         err = read_varint(f);
2464                         if (!ignore_errors)
2465                                 io_error |= err;
2466                         break;
2467                 }
2468
2469                 flist_expand(flist, 1);
2470                 file = recv_file_entry(f, flist, flags);
2471
2472                 if (S_ISREG(file->mode)) {
2473                         /* Already counted */
2474                 } else if (S_ISDIR(file->mode)) {
2475                         if (inc_recurse) {
2476                                 flist_expand(dir_flist, 1);
2477                                 dir_flist->files[dir_flist->used++] = file;
2478                         }
2479                         stats.num_dirs++;
2480                 } else if (S_ISLNK(file->mode))
2481                         stats.num_symlinks++;
2482                 else if (IS_DEVICE(file->mode))
2483                         stats.num_symlinks++;
2484                 else
2485                         stats.num_specials++;
2486
2487                 flist->files[flist->used++] = file;
2488
2489                 maybe_emit_filelist_progress(flist->used);
2490
2491                 if (DEBUG_GTE(FLIST, 2)) {
2492                         char *name = f_name(file, NULL);
2493                         rprintf(FINFO, "recv_file_name(%s)\n", NS(name));
2494                 }
2495         }
2496         file_total += flist->used;
2497
2498         if (DEBUG_GTE(FLIST, 2))
2499                 rprintf(FINFO, "received %d names\n", flist->used);
2500
2501         if (show_filelist_p())
2502                 finish_filelist_progress(flist);
2503
2504         if (need_unsorted_flist) {
2505                 /* Create an extra array of index pointers that we can sort for
2506                  * the generator's use (for wading through the files in sorted
2507                  * order and for calling flist_find()).  We keep the "files"
2508                  * list unsorted for our exchange of index numbers with the
2509                  * other side (since their names may not sort the same). */
2510                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2511                         out_of_memory("recv_file_list");
2512                 memcpy(flist->sorted, flist->files,
2513                        flist->used * sizeof (struct file_struct*));
2514                 if (inc_recurse && dir_flist->used > dstart) {
2515                         static int dir_flist_malloced = 0;
2516                         if (dir_flist_malloced < dir_flist->malloced) {
2517                                 dir_flist->sorted = realloc_array(dir_flist->sorted,
2518                                                         struct file_struct *,
2519                                                         dir_flist->malloced);
2520                                 dir_flist_malloced = dir_flist->malloced;
2521                         }
2522                         memcpy(dir_flist->sorted + dstart, dir_flist->files + dstart,
2523                                (dir_flist->used - dstart) * sizeof (struct file_struct*));
2524                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2525                 }
2526         } else {
2527                 flist->sorted = flist->files;
2528                 if (inc_recurse && dir_flist->used > dstart) {
2529                         dir_flist->sorted = dir_flist->files;
2530                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2531                 }
2532         }
2533
2534         if (inc_recurse)
2535                 flist_done_allocating(flist);
2536         else if (f >= 0) {
2537                 recv_id_list(f, flist);
2538                 flist_eof = 1;
2539         }
2540
2541         flist_sort_and_clean(flist, relative_paths);
2542
2543         if (protocol_version < 30) {
2544                 /* Recv the io_error flag */
2545                 int err = read_int(f);
2546                 if (!ignore_errors)
2547                         io_error |= err;
2548         } else if (inc_recurse && flist->ndx_start == 1) {
2549                 if (!file_total || strcmp(flist->sorted[flist->low]->basename, ".") != 0)
2550                         flist->parent_ndx = -1;
2551         }
2552
2553         if (DEBUG_GTE(FLIST, 3))
2554                 output_flist(flist);
2555
2556         if (DEBUG_GTE(FLIST, 2))
2557                 rprintf(FINFO, "recv_file_list done\n");
2558
2559         stats.flist_size += stats.total_read - start_read;
2560         stats.num_files += flist->used;
2561
2562         return flist;
2563 }
2564
2565 /* This is only used once by the receiver if the very first file-list
2566  * has exactly one item in it. */
2567 void recv_additional_file_list(int f)
2568 {
2569         struct file_list *flist;
2570         int ndx = read_ndx(f);
2571         if (ndx == NDX_FLIST_EOF) {
2572                 flist_eof = 1;
2573                 change_local_filter_dir(NULL, 0, 0);
2574         } else {
2575                 ndx = NDX_FLIST_OFFSET - ndx;
2576                 if (ndx < 0 || ndx >= dir_flist->used) {
2577                         ndx = NDX_FLIST_OFFSET - ndx;
2578                         rprintf(FERROR,
2579                                 "[%s] Invalid dir index: %d (%d - %d)\n",
2580                                 who_am_i(), ndx, NDX_FLIST_OFFSET,
2581                                 NDX_FLIST_OFFSET - dir_flist->used + 1);
2582                         exit_cleanup(RERR_PROTOCOL);
2583                 }
2584                 if (DEBUG_GTE(FLIST, 3)) {
2585                         rprintf(FINFO, "[%s] receiving flist for dir %d\n",
2586                                 who_am_i(), ndx);
2587                 }
2588                 flist = recv_file_list(f);
2589                 flist->parent_ndx = ndx;
2590         }
2591 }
2592
2593 /* Search for an identically-named item in the file list.  Note that the
2594  * items must agree in their directory-ness, or no match is returned. */
2595 int flist_find(struct file_list *flist, struct file_struct *f)
2596 {
2597         int low = flist->low, high = flist->high;
2598         int diff, mid, mid_up;
2599
2600         while (low <= high) {
2601                 mid = (low + high) / 2;
2602                 if (F_IS_ACTIVE(flist->sorted[mid]))
2603                         mid_up = mid;
2604                 else {
2605                         /* Scan for the next non-empty entry using the cached
2606                          * distance values.  If the value isn't fully up-to-
2607                          * date, update it. */
2608                         mid_up = mid + F_DEPTH(flist->sorted[mid]);
2609                         if (!F_IS_ACTIVE(flist->sorted[mid_up])) {
2610                                 do {
2611                                     mid_up += F_DEPTH(flist->sorted[mid_up]);
2612                                 } while (!F_IS_ACTIVE(flist->sorted[mid_up]));
2613                                 F_DEPTH(flist->sorted[mid]) = mid_up - mid;
2614                         }
2615                         if (mid_up > high) {
2616                                 /* If there's nothing left above us, set high to
2617                                  * a non-empty entry below us and continue. */
2618                                 high = mid - (int)flist->sorted[mid]->len32;
2619                                 if (!F_IS_ACTIVE(flist->sorted[high])) {
2620                                         do {
2621                                             high -= (int)flist->sorted[high]->len32;
2622                                         } while (!F_IS_ACTIVE(flist->sorted[high]));
2623                                         flist->sorted[mid]->len32 = mid - high;
2624                                 }
2625                                 continue;
2626                         }
2627                 }
2628                 diff = f_name_cmp(flist->sorted[mid_up], f);
2629                 if (diff == 0) {
2630                         if (protocol_version < 29
2631                             && S_ISDIR(flist->sorted[mid_up]->mode)
2632                             != S_ISDIR(f->mode))
2633                                 return -1;
2634                         return mid_up;
2635                 }
2636                 if (diff < 0)
2637                         low = mid_up + 1;
2638                 else
2639                         high = mid - 1;
2640         }
2641         return -1;
2642 }
2643
2644 /* Search for an identically-named item in the file list.  Differs from
2645  * flist_find in that an item that agrees with "f" in directory-ness is
2646  * preferred but one that does not is still found. */
2647 int flist_find_ignore_dirness(struct file_list *flist, struct file_struct *f)
2648 {
2649         mode_t save_mode;
2650         int ndx;
2651
2652         /* First look for an item that agrees in directory-ness. */
2653         ndx = flist_find(flist, f);
2654         if (ndx >= 0)
2655                 return ndx;
2656
2657         /* Temporarily flip f->mode to look for an item of opposite
2658          * directory-ness. */
2659         save_mode = f->mode;
2660         f->mode = S_ISDIR(f->mode) ? S_IFREG : S_IFDIR;
2661         ndx = flist_find(flist, f);
2662         f->mode = save_mode;
2663         return ndx;
2664 }
2665
2666 /*
2667  * Free up any resources a file_struct has allocated
2668  * and clear the file.
2669  */
2670 void clear_file(struct file_struct *file)
2671 {
2672         /* The +1 zeros out the first char of the basename. */
2673         memset(file, 0, FILE_STRUCT_LEN + 1);
2674         /* In an empty entry, F_DEPTH() is an offset to the next non-empty
2675          * entry.  Likewise for len32 in the opposite direction.  We assume
2676          * that we're alone for now since flist_find() will adjust the counts
2677          * it runs into that aren't up-to-date. */
2678         file->len32 = F_DEPTH(file) = 1;
2679 }
2680
2681 /* Allocate a new file list. */
2682 struct file_list *flist_new(int flags, char *msg)
2683 {
2684         struct file_list *flist;
2685
2686         if (!(flist = new0(struct file_list)))
2687                 out_of_memory(msg);
2688
2689         if (flags & FLIST_TEMP) {
2690                 if (!(flist->file_pool = pool_create(SMALL_EXTENT, 0,
2691                                                      out_of_memory,
2692                                                      POOL_INTERN)))
2693                         out_of_memory(msg);
2694         } else {
2695                 /* This is a doubly linked list with prev looping back to
2696                  * the end of the list, but the last next pointer is NULL. */
2697                 if (!first_flist) {
2698                         flist->file_pool = pool_create(NORMAL_EXTENT, 0,
2699                                                        out_of_memory,
2700                                                        POOL_INTERN);
2701                         if (!flist->file_pool)
2702                                 out_of_memory(msg);
2703
2704                         flist->ndx_start = flist->flist_num = inc_recurse ? 1 : 0;
2705
2706                         first_flist = cur_flist = flist->prev = flist;
2707                 } else {
2708                         struct file_list *prev = first_flist->prev;
2709
2710                         flist->file_pool = first_flist->file_pool;
2711
2712                         flist->ndx_start = prev->ndx_start + prev->used + 1;
2713                         flist->flist_num = prev->flist_num + 1;
2714
2715                         flist->prev = prev;
2716                         prev->next = first_flist->prev = flist;
2717                 }
2718                 flist->pool_boundary = pool_boundary(flist->file_pool, 0);
2719                 flist_cnt++;
2720         }
2721
2722         return flist;
2723 }
2724
2725 /* Free up all elements in a flist. */
2726 void flist_free(struct file_list *flist)
2727 {
2728         if (!flist->prev) {
2729                 /* Was FLIST_TEMP dir-list. */
2730         } else if (flist == flist->prev) {
2731                 first_flist = cur_flist = NULL;
2732                 file_total = 0;
2733                 flist_cnt = 0;
2734         } else {
2735                 if (flist == cur_flist)
2736                         cur_flist = flist->next;
2737                 if (flist == first_flist)
2738                         first_flist = first_flist->next;
2739                 else {
2740                         flist->prev->next = flist->next;
2741                         if (!flist->next)
2742                                 flist->next = first_flist;
2743                 }
2744                 flist->next->prev = flist->prev;
2745                 file_total -= flist->used;
2746                 flist_cnt--;
2747         }
2748
2749         if (!flist->prev || !flist_cnt)
2750                 pool_destroy(flist->file_pool);
2751         else
2752                 pool_free_old(flist->file_pool, flist->pool_boundary);
2753
2754         if (flist->sorted && flist->sorted != flist->files)
2755                 free(flist->sorted);
2756         free(flist->files);
2757         free(flist);
2758 }
2759
2760 /* This routine ensures we don't have any duplicate names in our file list.
2761  * duplicate names can cause corruption because of the pipelining. */
2762 static void flist_sort_and_clean(struct file_list *flist, int strip_root)
2763 {
2764         char fbuf[MAXPATHLEN];
2765         int i, prev_i;
2766
2767         if (!flist)
2768                 return;
2769         if (flist->used == 0) {
2770                 flist->high = -1;
2771                 flist->low = 0;
2772                 return;
2773         }
2774
2775         fsort(flist->sorted, flist->used);
2776
2777         if (!am_sender || inc_recurse) {
2778                 for (i = prev_i = 0; i < flist->used; i++) {
2779                         if (F_IS_ACTIVE(flist->sorted[i])) {
2780                                 prev_i = i;
2781                                 break;
2782                         }
2783                 }
2784                 flist->low = prev_i;
2785         } else {
2786                 i = prev_i = flist->used - 1;
2787                 flist->low = 0;
2788         }
2789
2790         while (++i < flist->used) {
2791                 int j;
2792                 struct file_struct *file = flist->sorted[i];
2793
2794                 if (!F_IS_ACTIVE(file))
2795                         continue;
2796                 if (f_name_cmp(file, flist->sorted[prev_i]) == 0)
2797                         j = prev_i;
2798                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
2799                         int save_mode = file->mode;
2800                         /* Make sure that this directory doesn't duplicate a
2801                          * non-directory earlier in the list. */
2802                         flist->high = prev_i;
2803                         file->mode = S_IFREG;
2804                         j = flist_find(flist, file);
2805                         file->mode = save_mode;
2806                 } else
2807                         j = -1;
2808                 if (j >= 0) {
2809                         int keep, drop;
2810                         /* If one is a dir and the other is not, we want to
2811                          * keep the dir because it might have contents in the
2812                          * list.  Otherwise keep the first one. */
2813                         if (S_ISDIR(file->mode)) {
2814                                 struct file_struct *fp = flist->sorted[j];
2815                                 if (!S_ISDIR(fp->mode))
2816                                         keep = i, drop = j;
2817                                 else {
2818                                         if (am_sender)
2819                                                 file->flags |= FLAG_DUPLICATE;
2820                                         else { /* Make sure we merge our vital flags. */
2821                                                 fp->flags |= file->flags & (FLAG_TOP_DIR|FLAG_CONTENT_DIR);
2822                                                 fp->flags &= file->flags | ~FLAG_IMPLIED_DIR;
2823                                         }
2824                                         keep = j, drop = i;
2825                                 }
2826                         } else
2827                                 keep = j, drop = i;
2828
2829                         if (!am_sender) {
2830                                 if (DEBUG_GTE(DUP, 1)) {
2831                                         rprintf(FINFO,
2832                                             "removing duplicate name %s from file list (%d)\n",
2833                                             f_name(file, fbuf), drop + flist->ndx_start);
2834                                 }
2835                                 clear_file(flist->sorted[drop]);
2836                         }
2837
2838                         if (keep == i) {
2839                                 if (flist->low == drop) {
2840                                         for (j = drop + 1;
2841                                              j < i && !F_IS_ACTIVE(flist->sorted[j]);
2842                                              j++) {}
2843                                         flist->low = j;
2844                                 }
2845                                 prev_i = i;
2846                         }
2847                 } else
2848                         prev_i = i;
2849         }
2850         flist->high = prev_i;
2851
2852         if (strip_root) {
2853                 /* We need to strip off the leading slashes for relative
2854                  * paths, but this must be done _after_ the sorting phase. */
2855                 for (i = flist->low; i <= flist->high; i++) {
2856                         struct file_struct *file = flist->sorted[i];
2857
2858                         if (!file->dirname)
2859                                 continue;
2860                         while (*file->dirname == '/')
2861                                 file->dirname++;
2862                         if (!*file->dirname)
2863                                 file->dirname = NULL;
2864                 }
2865         }
2866
2867         if (prune_empty_dirs && !am_sender) {
2868                 int j, prev_depth = 0;
2869
2870                 prev_i = 0; /* It's OK that this isn't really true. */
2871
2872                 for (i = flist->low; i <= flist->high; i++) {
2873                         struct file_struct *fp, *file = flist->sorted[i];
2874
2875                         /* This temporarily abuses the F_DEPTH() value for a
2876                          * directory that is in a chain that might get pruned.
2877                          * We restore the old value if it gets a reprieve. */
2878                         if (S_ISDIR(file->mode) && F_DEPTH(file)) {
2879                                 /* Dump empty dirs when coming back down. */
2880                                 for (j = prev_depth; j >= F_DEPTH(file); j--) {
2881                                         fp = flist->sorted[prev_i];
2882                                         if (F_DEPTH(fp) >= 0)
2883                                                 break;
2884                                         prev_i = -F_DEPTH(fp)-1;
2885                                         clear_file(fp);
2886                                 }
2887                                 prev_depth = F_DEPTH(file);
2888                                 if (is_excluded(f_name(file, fbuf), 1,
2889                                                        ALL_FILTERS)) {
2890                                         /* Keep dirs through this dir. */
2891                                         for (j = prev_depth-1; ; j--) {
2892                                                 fp = flist->sorted[prev_i];
2893                                                 if (F_DEPTH(fp) >= 0)
2894                                                         break;
2895                                                 prev_i = -F_DEPTH(fp)-1;
2896                                                 F_DEPTH(fp) = j;
2897                                         }
2898                                 } else
2899                                         F_DEPTH(file) = -prev_i-1;
2900                                 prev_i = i;
2901                         } else {
2902                                 /* Keep dirs through this non-dir. */
2903                                 for (j = prev_depth; ; j--) {
2904                                         fp = flist->sorted[prev_i];
2905                                         if (F_DEPTH(fp) >= 0)
2906                                                 break;
2907                                         prev_i = -F_DEPTH(fp)-1;
2908                                         F_DEPTH(fp) = j;
2909                                 }
2910                         }
2911                 }
2912                 /* Dump all remaining empty dirs. */
2913                 while (1) {
2914                         struct file_struct *fp = flist->sorted[prev_i];
2915                         if (F_DEPTH(fp) >= 0)
2916                                 break;
2917                         prev_i = -F_DEPTH(fp)-1;
2918                         clear_file(fp);
2919                 }
2920
2921                 for (i = flist->low; i <= flist->high; i++) {
2922                         if (F_IS_ACTIVE(flist->sorted[i]))
2923                                 break;
2924                 }
2925                 flist->low = i;
2926                 for (i = flist->high; i >= flist->low; i--) {
2927                         if (F_IS_ACTIVE(flist->sorted[i]))
2928                                 break;
2929                 }
2930                 flist->high = i;
2931         }
2932 }
2933
2934 static void output_flist(struct file_list *flist)
2935 {
2936         char uidbuf[16], gidbuf[16], depthbuf[16];
2937         struct file_struct *file;
2938         const char *root, *dir, *slash, *name, *trail;
2939         const char *who = who_am_i();
2940         int i;
2941
2942         rprintf(FINFO, "[%s] flist start=%d, used=%d, low=%d, high=%d\n",
2943                 who, flist->ndx_start, flist->used, flist->low, flist->high);
2944         for (i = 0; i < flist->used; i++) {
2945                 file = flist->files[i];
2946                 if ((am_root || am_sender) && uid_ndx) {
2947                         snprintf(uidbuf, sizeof uidbuf, " uid=%u",
2948                                  F_OWNER(file));
2949                 } else
2950                         *uidbuf = '\0';
2951                 if (gid_ndx) {
2952                         static char parens[] = "(\0)\0\0\0";
2953                         char *pp = parens + (file->flags & FLAG_SKIP_GROUP ? 0 : 3);
2954                         snprintf(gidbuf, sizeof gidbuf, " gid=%s%u%s",
2955                                  pp, F_GROUP(file), pp + 2);
2956                 } else
2957                         *gidbuf = '\0';
2958                 if (!am_sender)
2959                         snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file));
2960                 if (F_IS_ACTIVE(file)) {
2961                         root = am_sender ? NS(F_PATHNAME(file)) : depthbuf;
2962                         if ((dir = file->dirname) == NULL)
2963                                 dir = slash = "";
2964                         else
2965                                 slash = "/";
2966                         name = file->basename;
2967                         trail = S_ISDIR(file->mode) ? "/" : "";
2968                 } else
2969                         root = dir = slash = name = trail = "";
2970                 rprintf(FINFO,
2971                         "[%s] i=%d %s %s%s%s%s mode=0%o len=%s%s%s flags=%x\n",
2972                         who, i + flist->ndx_start,
2973                         root, dir, slash, name, trail,
2974                         (int)file->mode, comma_num(F_LENGTH(file)),
2975                         uidbuf, gidbuf, file->flags);
2976         }
2977 }
2978
2979 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
2980 enum fnc_type { t_PATH, t_ITEM };
2981
2982 static int found_prefix;
2983
2984 /* Compare the names of two file_struct entities, similar to how strcmp()
2985  * would do if it were operating on the joined strings.
2986  *
2987  * Some differences beginning with protocol_version 29: (1) directory names
2988  * are compared with an assumed trailing slash so that they compare in a
2989  * way that would cause them to sort immediately prior to any content they
2990  * may have; (2) a directory of any name compares after a non-directory of
2991  * any name at the same depth; (3) a directory with name "." compares prior
2992  * to anything else.  These changes mean that a directory and a non-dir
2993  * with the same name will not compare as equal (protocol_version >= 29).
2994  *
2995  * The dirname component can be an empty string, but the basename component
2996  * cannot (and never is in the current codebase).  The basename component
2997  * may be NULL (for a removed item), in which case it is considered to be
2998  * after any existing item. */
2999 int f_name_cmp(const struct file_struct *f1, const struct file_struct *f2)
3000 {
3001         int dif;
3002         const uchar *c1, *c2;
3003         enum fnc_state state1, state2;
3004         enum fnc_type type1, type2;
3005         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
3006
3007         if (!f1 || !F_IS_ACTIVE(f1)) {
3008                 if (!f2 || !F_IS_ACTIVE(f2))
3009                         return 0;
3010                 return -1;
3011         }
3012         if (!f2 || !F_IS_ACTIVE(f2))
3013                 return 1;
3014
3015         c1 = (uchar*)f1->dirname;
3016         c2 = (uchar*)f2->dirname;
3017         if (c1 == c2)
3018                 c1 = c2 = NULL;
3019         if (!c1) {
3020                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
3021                 c1 = (const uchar*)f1->basename;
3022                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
3023                         type1 = t_ITEM;
3024                         state1 = s_TRAILING;
3025                         c1 = (uchar*)"";
3026                 } else
3027                         state1 = s_BASE;
3028         } else {
3029                 type1 = t_path;
3030                 state1 = s_DIR;
3031         }
3032         if (!c2) {
3033                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
3034                 c2 = (const uchar*)f2->basename;
3035                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
3036                         type2 = t_ITEM;
3037                         state2 = s_TRAILING;
3038                         c2 = (uchar*)"";
3039                 } else
3040                         state2 = s_BASE;
3041         } else {
3042                 type2 = t_path;
3043                 state2 = s_DIR;
3044         }
3045
3046         if (type1 != type2)
3047                 return type1 == t_PATH ? 1 : -1;
3048
3049         do {
3050                 if (!*c1) {
3051                         switch (state1) {
3052                         case s_DIR:
3053                                 state1 = s_SLASH;
3054                                 c1 = (uchar*)"/";
3055                                 break;
3056                         case s_SLASH:
3057                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
3058                                 c1 = (const uchar*)f1->basename;
3059                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
3060                                         type1 = t_ITEM;
3061                                         state1 = s_TRAILING;
3062                                         c1 = (uchar*)"";
3063                                 } else
3064                                         state1 = s_BASE;
3065                                 break;
3066                         case s_BASE:
3067                                 state1 = s_TRAILING;
3068                                 if (type1 == t_PATH) {
3069                                         c1 = (uchar*)"/";
3070                                         break;
3071                                 }
3072                                 /* FALL THROUGH */
3073                         case s_TRAILING:
3074                                 type1 = t_ITEM;
3075                                 break;
3076                         }
3077                         if (*c2 && type1 != type2)
3078                                 return type1 == t_PATH ? 1 : -1;
3079                 }
3080                 if (!*c2) {
3081                         switch (state2) {
3082                         case s_DIR:
3083                                 state2 = s_SLASH;
3084                                 c2 = (uchar*)"/";
3085                                 break;
3086                         case s_SLASH:
3087                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
3088                                 c2 = (const uchar*)f2->basename;
3089                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
3090                                         type2 = t_ITEM;
3091                                         state2 = s_TRAILING;
3092                                         c2 = (uchar*)"";
3093                                 } else
3094                                         state2 = s_BASE;
3095                                 break;
3096                         case s_BASE:
3097                                 state2 = s_TRAILING;
3098                                 if (type2 == t_PATH) {
3099                                         c2 = (uchar*)"/";
3100                                         break;
3101                                 }
3102                                 /* FALL THROUGH */
3103                         case s_TRAILING:
3104                                 found_prefix = 1;
3105                                 if (!*c1)
3106                                         return 0;
3107                                 type2 = t_ITEM;
3108                                 break;
3109                         }
3110                         if (type1 != type2)
3111                                 return type1 == t_PATH ? 1 : -1;
3112                 }
3113         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
3114
3115         return dif;
3116 }
3117
3118 /* Returns 1 if f1's filename has all of f2's filename as a prefix.  This does
3119  * not match if f2's basename is not an exact match of a path element in f1.
3120  * E.g. /path/foo is not a prefix of /path/foobar/baz, but /path/foobar is. */
3121 int f_name_has_prefix(const struct file_struct *f1, const struct file_struct *f2)
3122 {
3123         found_prefix = 0;
3124         f_name_cmp(f1, f2);
3125         return found_prefix;
3126 }
3127
3128 char *f_name_buf(void)
3129 {
3130         static char names[5][MAXPATHLEN];
3131         static unsigned int n;
3132
3133         n = (n + 1) % (sizeof names / sizeof names[0]);
3134
3135         return names[n];
3136 }
3137
3138 /* Return a copy of the full filename of a flist entry, using the indicated
3139  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
3140  * done because we checked the size when creating the file_struct entry.
3141  */
3142 char *f_name(const struct file_struct *f, char *fbuf)
3143 {
3144         if (!f || !F_IS_ACTIVE(f))
3145                 return NULL;
3146
3147         if (!fbuf)
3148                 fbuf = f_name_buf();
3149
3150         if (f->dirname) {
3151                 int len = strlen(f->dirname);
3152                 memcpy(fbuf, f->dirname, len);
3153                 fbuf[len] = '/';
3154                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
3155         } else
3156                 strlcpy(fbuf, f->basename, MAXPATHLEN);
3157
3158         return fbuf;
3159 }
3160
3161 /* Do a non-recursive scan of the named directory, possibly ignoring all
3162  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
3163  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
3164  * buffer (the functions we call will append names onto the end, but the old
3165  * dir value will be restored on exit). */
3166 struct file_list *get_dirlist(char *dirname, int dlen, int ignore_filter_rules)
3167 {
3168         struct file_list *dirlist;
3169         char dirbuf[MAXPATHLEN];
3170         int save_recurse = recurse;
3171         int save_xfer_dirs = xfer_dirs;
3172         int save_prune_empty_dirs = prune_empty_dirs;
3173
3174         if (dlen < 0) {
3175                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
3176                 if (dlen >= MAXPATHLEN)
3177                         return NULL;
3178                 dirname = dirbuf;
3179         }
3180
3181         dirlist = flist_new(FLIST_TEMP, "get_dirlist");
3182
3183         recurse = 0;
3184         xfer_dirs = 1;
3185         send_directory(ignore_filter_rules ? -2 : -1, dirlist, dirname, dlen,
3186                        FLAG_CONTENT_DIR, PHYS_DEPTH_N_A);
3187         xfer_dirs = save_xfer_dirs;
3188         recurse = save_recurse;
3189         if (INFO_GTE(PROGRESS, 1))
3190                 flist_count_offset += dirlist->used;
3191
3192         prune_empty_dirs = 0;
3193         dirlist->sorted = dirlist->files;
3194         flist_sort_and_clean(dirlist, 0);
3195         prune_empty_dirs = save_prune_empty_dirs;
3196
3197         if (DEBUG_GTE(FLIST, 3))
3198                 output_flist(dirlist);
3199
3200         return dirlist;
3201 }