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) 2002-2008 Wayne Davison
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 3 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, visit the http://fsf.org website.
  21  */
  22
  23 #include "rsync.h"
  24 #include "ifuncs.h"
  25 #include "rounding.h"
  26 #include "io.h"
  27
  28 extern int verbose;
  29 extern int am_root;
  30 extern int am_server;
  31 extern int am_daemon;
  32 extern int am_sender;
  33 extern int am_generator;
  34 extern int inc_recurse;
  35 extern int do_progress;
  36 extern int always_checksum;
  37 extern int module_id;
  38 extern int ignore_errors;
  39 extern int numeric_ids;
  40 extern int recurse;
  41 extern int use_qsort;
  42 extern int xfer_dirs;
  43 extern int filesfrom_fd;
  44 extern int one_file_system;
  45 extern int copy_dirlinks;
  46 extern int keep_dirlinks;
  47 extern int preserve_uid;
  48 extern int preserve_gid;
  49 extern int preserve_acls;
  50 extern int preserve_xattrs;
  51 extern int preserve_links;
  52 extern int preserve_hard_links;
  53 extern int preserve_devices;
  54 extern int preserve_specials;
  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 unsort_ndx;
  71 extern struct stats stats;
  72 extern char *filesfrom_host;
  73
  74 extern char curr_dir[MAXPATHLEN];
  75
  76 extern struct chmod_mode_struct *chmod_modes;
  77
  78 extern struct filter_list_struct filter_list;
  79 extern struct filter_list_struct server_filter_list;
  80
  81 #ifdef ICONV_OPTION
  82 extern int filesfrom_convert;
  83 extern iconv_t ic_send, ic_recv;
  84 #endif
  85
  86 #define PTR_SIZE (sizeof (struct file_struct *))
  87
  88 int io_error;
  89 int checksum_len;
  90 dev_t filesystem_dev; /* used to implement -x */
  91
  92 struct file_list *cur_flist, *first_flist, *dir_flist;
  93 int send_dir_ndx = -1, send_dir_depth = -1;
  94 int flist_cnt = 0; /* how many (non-tmp) file list objects exist */
  95 int file_total = 0; /* total of all active items over all file-lists */
  96 int flist_eof = 0; /* all the file-lists are now known */
  97
  98 #define NORMAL_NAME 0
  99 #define SLASH_ENDING_NAME 1
 100 #define DOT_NAME 2
 101
 102 /* Starting from protocol version 26, we always use 64-bit ino_t and dev_t
 103  * internally, even if this platform does not allow files to have 64-bit inums.
 104  * The only exception is if we're on a platform with no 64-bit type at all.
 105  *
 106  * Because we use read_longint() to get these off the wire, if you transfer
 107  * devices or (for protocols < 30) hardlinks with dev or inum > 2**32 to a
 108  * machine with no 64-bit types then you will get an overflow error.
 109  *
 110  * Note that if you transfer devices from a 64-bit-devt machine (say, Solaris)
 111  * to a 32-bit-devt machine (say, Linux-2.2/x86) then the device numbers will
 112  * be truncated.  But it's a kind of silly thing to do anyhow. */
 113
 114 /* The tmp_* vars are used as a cache area by make_file() to store data
 115  * that the sender doesn't need to remember in its file list.  The data
 116  * will survive just long enough to be used by send_file_entry(). */
 117 static dev_t tmp_rdev;
 118 #ifdef SUPPORT_HARD_LINKS
 119 static int64 tmp_dev, tmp_ino;
 120 #endif
 121 static char tmp_sum[MAX_DIGEST_LEN];
 122
 123 static char empty_sum[MAX_DIGEST_LEN];
 124 static int flist_count_offset; /* for --delete --progress */
 125 static int dir_count = 0;
 126
 127 static void flist_sort_and_clean(struct file_list *flist, int strip_root);
 128 static void output_flist(struct file_list *flist);
 129
 130 void init_flist(void)
 131 {
 132         if (verbose > 4) {
 133                 rprintf(FINFO, "FILE_STRUCT_LEN=%d, EXTRA_LEN=%d\n",
 134                         (int)FILE_STRUCT_LEN, (int)EXTRA_LEN);
 135         }
 136         checksum_len = protocol_version < 21 ? 2
 137                      : protocol_version < 30 ? MD4_DIGEST_LEN
 138                      : MD5_DIGEST_LEN;
 139 }
 140
 141 static int show_filelist_p(void)
 142 {
 143         return verbose && xfer_dirs && !am_server && !inc_recurse;
 144 }
 145
 146 static void start_filelist_progress(char *kind)
 147 {
 148         rprintf(FCLIENT, "%s ... ", kind);
 149         if (verbose > 1 || do_progress)
 150                 rprintf(FCLIENT, "\n");
 151         rflush(FINFO);
 152 }
 153
 154 static void emit_filelist_progress(int count)
 155 {
 156         rprintf(FCLIENT, " %d files...\r", count);
 157 }
 158
 159 static void maybe_emit_filelist_progress(int count)
 160 {
 161         if (do_progress && show_filelist_p() && (count % 100) == 0)
 162                 emit_filelist_progress(count);
 163 }
 164
 165 static void finish_filelist_progress(const struct file_list *flist)
 166 {
 167         if (do_progress) {
 168                 /* This overwrites the progress line */
 169                 rprintf(FINFO, "%d file%sto consider\n",
 170                         flist->used, flist->used == 1 ? " " : "s ");
 171         } else
 172                 rprintf(FINFO, "done\n");
 173 }
 174
 175 void show_flist_stats(void)
 176 {
 177         /* Nothing yet */
 178 }
 179
 180 /* Stat either a symlink or its referent, depending on the settings of
 181  * copy_links, copy_unsafe_links, etc.  Returns -1 on error, 0 on success.
 182  *
 183  * If path is the name of a symlink, then the linkbuf buffer (which must hold
 184  * MAXPATHLEN chars) will be set to the symlink's target string.
 185  *
 186  * The stat structure pointed to by stp will contain information about the
 187  * link or the referent as appropriate, if they exist. */
 188 static int readlink_stat(const char *path, STRUCT_STAT *stp, char *linkbuf)
 189 {
 190 #ifdef SUPPORT_LINKS
 191         if (link_stat(path, stp, copy_dirlinks) < 0)
 192                 return -1;
 193         if (S_ISLNK(stp->st_mode)) {
 194                 int llen = readlink(path, linkbuf, MAXPATHLEN - 1);
 195                 if (llen < 0)
 196                         return -1;
 197                 linkbuf[llen] = '\0';
 198                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 199                         if (verbose > 1) {
 200                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 201                                         path, linkbuf);
 202                         }
 203                         return x_stat(path, stp, NULL);
 204                 }
 205                 if (munge_symlinks && am_sender && llen > SYMLINK_PREFIX_LEN
 206                  && strncmp(linkbuf, SYMLINK_PREFIX, SYMLINK_PREFIX_LEN) == 0) {
 207                         memmove(linkbuf, linkbuf + SYMLINK_PREFIX_LEN,
 208                                 llen - SYMLINK_PREFIX_LEN + 1);
 209                 }
 210         }
 211         return 0;
 212 #else
 213         return x_stat(path, stp, NULL);
 214 #endif
 215 }
 216
 217 int link_stat(const char *path, STRUCT_STAT *stp, int follow_dirlinks)
 218 {
 219 #ifdef SUPPORT_LINKS
 220         if (copy_links)
 221                 return x_stat(path, stp, NULL);
 222         if (x_lstat(path, stp, NULL) < 0)
 223                 return -1;
 224         if (follow_dirlinks && S_ISLNK(stp->st_mode)) {
 225                 STRUCT_STAT st;
 226                 if (x_stat(path, &st, NULL) == 0 && S_ISDIR(st.st_mode))
 227                         *stp = st;
 228         }
 229         return 0;
 230 #else
 231         return x_stat(path, stp, NULL);
 232 #endif
 233 }
 234
 235 /* This function is used to check if a file should be included/excluded
 236  * from the list of files based on its name and type etc.  The value of
 237  * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
 238 static int is_excluded(char *fname, int is_dir, int filter_level)
 239 {
 240 #if 0 /* This currently never happens, so avoid a useless compare. */
 241         if (filter_level == NO_FILTERS)
 242                 return 0;
 243 #endif
 244         if (fname) {
 245                 /* never exclude '.', even if somebody does --exclude '*' */
 246                 if (fname[0] == '.' && !fname[1])
 247                         return 0;
 248                 /* Handle the -R version of the '.' dir. */
 249                 if (fname[0] == '/') {
 250                         int len = strlen(fname);
 251                         if (fname[len-1] == '.' && fname[len-2] == '/')
 252                                 return 0;
 253                 }
 254         }
 255         if (server_filter_list.head
 256             && check_filter(&server_filter_list, fname, is_dir) < 0)
 257                 return 1;
 258         if (filter_level != ALL_FILTERS)
 259                 return 0;
 260         if (filter_list.head
 261             && check_filter(&filter_list, fname, is_dir) < 0)
 262                 return 1;
 263         return 0;
 264 }
 265
 266 static void send_directory(int f, struct file_list *flist,
 267                            char *fbuf, int len, int flags);
 268
 269 static const char *pathname, *orig_dir;
 270 static int pathname_len;
 271
 272
 273 /* Make sure flist can hold at least flist->used + extra entries. */
 274 static void flist_expand(struct file_list *flist, int extra)
 275 {
 276         struct file_struct **new_ptr;
 277
 278         if (flist->used + extra <= flist->malloced)
 279                 return;
 280
 281         if (flist->malloced < FLIST_START)
 282                 flist->malloced = FLIST_START;
 283         else if (flist->malloced >= FLIST_LINEAR)
 284                 flist->malloced += FLIST_LINEAR;
 285         else
 286                 flist->malloced *= 2;
 287
 288         /* In case count jumped or we are starting the list
 289          * with a known size just set it. */
 290         if (flist->malloced < flist->used + extra)
 291                 flist->malloced = flist->used + extra;
 292
 293         new_ptr = realloc_array(flist->files, struct file_struct *,
 294                                 flist->malloced);
 295
 296         if (verbose >= 2 && flist->malloced != FLIST_START) {
 297                 rprintf(FCLIENT, "[%s] expand file_list pointer array to %.0f bytes, did%s move\n",
 298                     who_am_i(),
 299                     (double)sizeof flist->files[0] * flist->malloced,
 300                     (new_ptr == flist->files) ? " not" : "");
 301         }
 302
 303         flist->files = new_ptr;
 304
 305         if (!flist->files)
 306                 out_of_memory("flist_expand");
 307 }
 308
 309 static void flist_done_allocating(struct file_list *flist)
 310 {
 311         void *ptr = pool_boundary(flist->file_pool, 8*1024);
 312         if (flist->pool_boundary == ptr)
 313                 flist->pool_boundary = NULL; /* list didn't use any pool memory */
 314         else
 315                 flist->pool_boundary = ptr;
 316 }
 317
 318 int push_pathname(const char *dir, int len)
 319 {
 320         if (dir == pathname)
 321                 return 1;
 322
 323         if (!orig_dir)
 324                 orig_dir = strdup(curr_dir);
 325
 326         if (pathname && !pop_dir(orig_dir)) {
 327                 rsyserr(FERROR, errno, "pop_dir %s failed",
 328                         full_fname(orig_dir));
 329                 exit_cleanup(RERR_FILESELECT);
 330         }
 331
 332         if (dir && !push_dir(dir, 0)) {
 333                 io_error |= IOERR_GENERAL;
 334                 rsyserr(FERROR, errno, "push_dir %s failed in %s",
 335                         full_fname(dir), curr_dir);
 336                 return 0;
 337         }
 338
 339         pathname = dir;
 340         pathname_len = len >= 0 ? len : dir ? (int)strlen(dir) : 0;
 341
 342         return 1;
 343 }
 344
 345 static void send_file_entry(int f, struct file_struct *file, int ndx, int first_ndx)
 346 {
 347         static time_t modtime;
 348         static mode_t mode;
 349 #ifdef SUPPORT_HARD_LINKS
 350         static int64 dev;
 351 #endif
 352         static dev_t rdev;
 353         static uint32 rdev_major;
 354         static uid_t uid;
 355         static gid_t gid;
 356         static const char *user_name, *group_name;
 357         static char lastname[MAXPATHLEN];
 358         char fname[MAXPATHLEN];
 359         int first_hlink_ndx = -1;
 360         int l1, l2;
 361         int xflags;
 362
 363 #ifdef ICONV_OPTION
 364         if (ic_send != (iconv_t)-1) {
 365                 xbuf outbuf, inbuf;
 366
 367                 INIT_CONST_XBUF(outbuf, fname);
 368
 369                 if (file->dirname) {
 370                         INIT_XBUF_STRLEN(inbuf, (char*)file->dirname);
 371                         outbuf.size -= 2; /* Reserve room for '/' & 1 more char. */
 372                         if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0)
 373                                 goto convert_error;
 374                         outbuf.size += 2;
 375                         outbuf.buf[outbuf.len++] = '/';
 376                 }
 377
 378                 INIT_XBUF_STRLEN(inbuf, (char*)file->basename);
 379                 if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0) {
 380                   convert_error:
 381                         io_error |= IOERR_GENERAL;
 382                         rprintf(FINFO,
 383                             "[%s] cannot convert filename: %s (%s)\n",
 384                             who_am_i(), f_name(file, fname), strerror(errno));
 385                         return;
 386                 }
 387                 outbuf.buf[outbuf.len] = '\0';
 388         } else
 389 #endif
 390                 f_name(file, fname);
 391
 392         /* Initialize starting value of xflags. */
 393         if (protocol_version >= 30 && S_ISDIR(file->mode)) {
 394                 dir_count++;
 395                 if (file->flags & FLAG_CONTENT_DIR)
 396                         xflags = file->flags & FLAG_TOP_DIR;
 397                 else if (file->flags & FLAG_IMPLIED_DIR)
 398                         xflags = XMIT_TOP_DIR | XMIT_NO_CONTENT_DIR;
 399                 else
 400                         xflags = XMIT_NO_CONTENT_DIR;
 401         } else
 402                 xflags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */
 403
 404         if (file->mode == mode)
 405                 xflags |= XMIT_SAME_MODE;
 406         else
 407                 mode = file->mode;
 408
 409         if ((preserve_devices && IS_DEVICE(mode))
 410          || (preserve_specials && IS_SPECIAL(mode))) {
 411                 if (protocol_version < 28) {
 412                         if (tmp_rdev == rdev)
 413                                 xflags |= XMIT_SAME_RDEV_pre28;
 414                         else
 415                                 rdev = tmp_rdev;
 416                 } else {
 417                         rdev = tmp_rdev;
 418                         if ((uint32)major(rdev) == rdev_major)
 419                                 xflags |= XMIT_SAME_RDEV_MAJOR;
 420                         else
 421                                 rdev_major = major(rdev);
 422                         if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu)
 423                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
 424                 }
 425         } else if (protocol_version < 28)
 426                 rdev = MAKEDEV(0, 0);
 427         if (preserve_uid) {
 428                 if ((uid_t)F_OWNER(file) == uid && *lastname)
 429                         xflags |= XMIT_SAME_UID;
 430                 else {
 431                         uid = F_OWNER(file);
 432                         if (!numeric_ids) {
 433                                 user_name = add_uid(uid);
 434                                 if (inc_recurse && user_name)
 435                                         xflags |= XMIT_USER_NAME_FOLLOWS;
 436                         }
 437                 }
 438         }
 439         if (preserve_gid) {
 440                 if ((gid_t)F_GROUP(file) == gid && *lastname)
 441                         xflags |= XMIT_SAME_GID;
 442                 else {
 443                         gid = F_GROUP(file);
 444                         if (!numeric_ids) {
 445                                 group_name = add_gid(gid);
 446                                 if (inc_recurse && group_name)
 447                                         xflags |= XMIT_GROUP_NAME_FOLLOWS;
 448                         }
 449                 }
 450         }
 451         if (file->modtime == modtime)
 452                 xflags |= XMIT_SAME_TIME;
 453         else
 454                 modtime = file->modtime;
 455
 456 #ifdef SUPPORT_HARD_LINKS
 457         if (tmp_dev != 0) {
 458                 if (protocol_version >= 30) {
 459                         struct ht_int64_node *np = idev_find(tmp_dev, tmp_ino);
 460                         first_hlink_ndx = (int32)(long)np->data - 1;
 461                         if (first_hlink_ndx < 0) {
 462                                 np->data = (void*)(long)(first_ndx + ndx + 1);
 463                                 xflags |= XMIT_HLINK_FIRST;
 464                         }
 465                         xflags |= XMIT_HLINKED;
 466                 } else {
 467                         if (tmp_dev == dev) {
 468                                 if (protocol_version >= 28)
 469                                         xflags |= XMIT_SAME_DEV_pre30;
 470                         } else
 471                                 dev = tmp_dev;
 472                         xflags |= XMIT_HLINKED;
 473                 }
 474         }
 475 #endif
 476
 477         for (l1 = 0;
 478             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 479             l1++) {}
 480         l2 = strlen(fname+l1);
 481
 482         if (l1 > 0)
 483                 xflags |= XMIT_SAME_NAME;
 484         if (l2 > 255)
 485                 xflags |= XMIT_LONG_NAME;
 486
 487         /* We must make sure we don't send a zero flag byte or the
 488          * other end will terminate the flist transfer.  Note that
 489          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 490          * it's harmless way to add a bit to the first flag byte. */
 491         if (protocol_version >= 28) {
 492                 if (!xflags && !S_ISDIR(mode))
 493                         xflags |= XMIT_TOP_DIR;
 494                 if ((xflags & 0xFF00) || !xflags) {
 495                         xflags |= XMIT_EXTENDED_FLAGS;
 496                         write_shortint(f, xflags);
 497                 } else
 498                         write_byte(f, xflags);
 499         } else {
 500                 if (!(xflags & 0xFF))
 501                         xflags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
 502                 write_byte(f, xflags);
 503         }
 504         if (xflags & XMIT_SAME_NAME)
 505                 write_byte(f, l1);
 506         if (xflags & XMIT_LONG_NAME)
 507                 write_varint30(f, l2);
 508         else
 509                 write_byte(f, l2);
 510         write_buf(f, fname + l1, l2);
 511
 512         if (first_hlink_ndx >= 0) {
 513                 write_varint(f, first_hlink_ndx);
 514                 if (first_hlink_ndx >= first_ndx)
 515                         goto the_end;
 516         }
 517
 518         write_varlong30(f, F_LENGTH(file), 3);
 519         if (!(xflags & XMIT_SAME_TIME)) {
 520                 if (protocol_version >= 30)
 521                         write_varlong(f, modtime, 4);
 522                 else
 523                         write_int(f, modtime);
 524         }
 525         if (!(xflags & XMIT_SAME_MODE))
 526                 write_int(f, to_wire_mode(mode));
 527         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
 528                 if (protocol_version < 30)
 529                         write_int(f, uid);
 530                 else {
 531                         write_varint(f, uid);
 532                         if (xflags & XMIT_USER_NAME_FOLLOWS) {
 533                                 int len = strlen(user_name);
 534                                 write_byte(f, len);
 535                                 write_buf(f, user_name, len);
 536                         }
 537                 }
 538         }
 539         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
 540                 if (protocol_version < 30)
 541                         write_int(f, gid);
 542                 else {
 543                         write_varint(f, gid);
 544                         if (xflags & XMIT_GROUP_NAME_FOLLOWS) {
 545                                 int len = strlen(group_name);
 546                                 write_byte(f, len);
 547                                 write_buf(f, group_name, len);
 548                         }
 549                 }
 550         }
 551         if ((preserve_devices && IS_DEVICE(mode))
 552          || (preserve_specials && IS_SPECIAL(mode))) {
 553                 if (protocol_version < 28) {
 554                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 555                                 write_int(f, (int)rdev);
 556                 } else {
 557                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 558                                 write_varint30(f, major(rdev));
 559                         if (protocol_version >= 30)
 560                                 write_varint(f, minor(rdev));
 561                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 562                                 write_byte(f, minor(rdev));
 563                         else
 564                                 write_int(f, minor(rdev));
 565                 }
 566         }
 567
 568 #ifdef SUPPORT_LINKS
 569         if (preserve_links && S_ISLNK(mode)) {
 570                 const char *sl = F_SYMLINK(file);
 571                 int len = strlen(sl);
 572                 write_varint30(f, len);
 573                 write_buf(f, sl, len);
 574         }
 575 #endif
 576
 577 #ifdef SUPPORT_HARD_LINKS
 578         if (tmp_dev != 0 && protocol_version < 30) {
 579                 if (protocol_version < 26) {
 580                         /* 32-bit dev_t and ino_t */
 581                         write_int(f, (int32)dev);
 582                         write_int(f, (int32)tmp_ino);
 583                 } else {
 584                         /* 64-bit dev_t and ino_t */
 585                         if (!(xflags & XMIT_SAME_DEV_pre30))
 586                                 write_longint(f, dev);
 587                         write_longint(f, tmp_ino);
 588                 }
 589         }
 590 #endif
 591
 592         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 593                 const char *sum;
 594                 if (S_ISREG(mode))
 595                         sum = tmp_sum;
 596                 else {
 597                         /* Prior to 28, we sent a useless set of nulls. */
 598                         sum = empty_sum;
 599                 }
 600                 write_buf(f, sum, checksum_len);
 601         }
 602
 603   the_end:
 604         strlcpy(lastname, fname, MAXPATHLEN);
 605
 606         if (S_ISREG(mode) || S_ISLNK(mode))
 607                 stats.total_size += F_LENGTH(file);
 608 }
 609
 610 static struct file_struct *recv_file_entry(struct file_list *flist,
 611                                            int xflags, int f)
 612 {
 613         static int64 modtime;
 614         static mode_t mode;
 615 #ifdef SUPPORT_HARD_LINKS
 616         static int64 dev;
 617 #endif
 618         static dev_t rdev;
 619         static uint32 rdev_major;
 620         static uid_t uid;
 621         static gid_t gid;
 622         static uint16 gid_flags;
 623         static char lastname[MAXPATHLEN], *lastdir;
 624         static int lastdir_depth, lastdir_len = -1;
 625         static unsigned int del_hier_name_len = 0;
 626         static int in_del_hier = 0;
 627         char thisname[MAXPATHLEN];
 628         unsigned int l1 = 0, l2 = 0;
 629         int alloc_len, basename_len, linkname_len;
 630         int extra_len = file_extra_cnt * EXTRA_LEN;
 631         int first_hlink_ndx = -1;
 632         OFF_T file_length;
 633         const char *basename;
 634         struct file_struct *file;
 635         alloc_pool_t *pool;
 636         char *bp;
 637
 638         if (xflags & XMIT_SAME_NAME)
 639                 l1 = read_byte(f);
 640
 641         if (xflags & XMIT_LONG_NAME)
 642                 l2 = read_varint30(f);
 643         else
 644                 l2 = read_byte(f);
 645
 646         if (l2 >= MAXPATHLEN - l1) {
 647                 rprintf(FERROR,
 648                         "overflow: xflags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
 649                         xflags, l1, l2, lastname, who_am_i());
 650                 overflow_exit("recv_file_entry");
 651         }
 652
 653         strlcpy(thisname, lastname, l1 + 1);
 654         read_sbuf(f, &thisname[l1], l2);
 655         thisname[l1 + l2] = 0;
 656
 657         /* Abuse basename_len for a moment... */
 658         basename_len = strlcpy(lastname, thisname, MAXPATHLEN);
 659
 660 #ifdef ICONV_OPTION
 661         if (ic_recv != (iconv_t)-1) {
 662                 xbuf outbuf, inbuf;
 663
 664                 INIT_CONST_XBUF(outbuf, thisname);
 665                 INIT_XBUF(inbuf, lastname, basename_len, -1);
 666
 667                 if (iconvbufs(ic_recv, &inbuf, &outbuf, 0) < 0) {
 668                         io_error |= IOERR_GENERAL;
 669                         rprintf(FINFO,
 670                             "[%s] cannot convert filename: %s (%s)\n",
 671                             who_am_i(), lastname, strerror(errno));
 672                         outbuf.len = 0;
 673                 }
 674                 outbuf.buf[outbuf.len] = '\0';
 675         }
 676 #endif
 677
 678         clean_fname(thisname, 0);
 679
 680         if (sanitize_paths)
 681                 sanitize_path(thisname, thisname, "", 0);
 682
 683         if ((basename = strrchr(thisname, '/')) != NULL) {
 684                 int len = basename++ - thisname;
 685                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
 686                         lastdir = new_array(char, len + 1);
 687                         memcpy(lastdir, thisname, len);
 688                         lastdir[len] = '\0';
 689                         lastdir_len = len;
 690                         lastdir_depth = count_dir_elements(lastdir);
 691                 }
 692         } else
 693                 basename = thisname;
 694         basename_len = strlen(basename) + 1; /* count the '\0' */
 695
 696 #ifdef SUPPORT_HARD_LINKS
 697         if (protocol_version >= 30
 698          && BITS_SETnUNSET(xflags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
 699                 first_hlink_ndx = read_varint(f);
 700                 if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->ndx_start + flist->used) {
 701                         rprintf(FERROR,
 702                                 "hard-link reference out of range: %d (%d)\n",
 703                                 first_hlink_ndx, flist->ndx_start + flist->used);
 704                         exit_cleanup(RERR_PROTOCOL);
 705                 }
 706                 if (first_hlink_ndx >= flist->ndx_start) {
 707                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 708                         file_length = F_LENGTH(first);
 709                         modtime = first->modtime;
 710                         mode = first->mode;
 711                         if (preserve_uid)
 712                                 uid = F_OWNER(first);
 713                         if (preserve_gid)
 714                                 gid = F_GROUP(first);
 715                         if ((preserve_devices && IS_DEVICE(mode))
 716                          || (preserve_specials && IS_SPECIAL(mode))) {
 717                                 uint32 *devp = F_RDEV_P(first);
 718                                 rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
 719                                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 720                         }
 721                         if (preserve_links && S_ISLNK(mode))
 722                                 linkname_len = strlen(F_SYMLINK(first)) + 1;
 723                         else
 724                                 linkname_len = 0;
 725                         goto create_object;
 726                 }
 727         }
 728 #endif
 729
 730         file_length = read_varlong30(f, 3);
 731         if (!(xflags & XMIT_SAME_TIME)) {
 732                 if (protocol_version >= 30) {
 733                         modtime = read_varlong(f, 4);
 734 #if SIZEOF_TIME_T < SIZEOF_INT64
 735                         if (!am_generator && (int64)(time_t)modtime != modtime) {
 736                                 rprintf(FERROR_XFER,
 737                                     "Time value of %s truncated on receiver.\n",
 738                                     lastname);
 739                         }
 740 #endif
 741                 } else
 742                         modtime = read_int(f);
 743         }
 744         if (!(xflags & XMIT_SAME_MODE))
 745                 mode = from_wire_mode(read_int(f));
 746
 747         if (chmod_modes && !S_ISLNK(mode))
 748                 mode = tweak_mode(mode, chmod_modes);
 749
 750         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
 751                 if (protocol_version < 30)
 752                         uid = (uid_t)read_int(f);
 753                 else {
 754                         uid = (uid_t)read_varint(f);
 755                         if (xflags & XMIT_USER_NAME_FOLLOWS)
 756                                 uid = recv_user_name(f, uid);
 757                         else if (inc_recurse && am_root && !numeric_ids)
 758                                 uid = match_uid(uid);
 759                 }
 760         }
 761         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
 762                 if (protocol_version < 30)
 763                         gid = (gid_t)read_int(f);
 764                 else {
 765                         gid = (gid_t)read_varint(f);
 766                         gid_flags = 0;
 767                         if (xflags & XMIT_GROUP_NAME_FOLLOWS)
 768                                 gid = recv_group_name(f, gid, &gid_flags);
 769                         else if (inc_recurse && (!am_root || !numeric_ids))
 770                                 gid = match_gid(gid, &gid_flags);
 771                 }
 772         }
 773
 774         if ((preserve_devices && IS_DEVICE(mode))
 775          || (preserve_specials && IS_SPECIAL(mode))) {
 776                 if (protocol_version < 28) {
 777                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 778                                 rdev = (dev_t)read_int(f);
 779                 } else {
 780                         uint32 rdev_minor;
 781                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 782                                 rdev_major = read_varint30(f);
 783                         if (protocol_version >= 30)
 784                                 rdev_minor = read_varint(f);
 785                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 786                                 rdev_minor = read_byte(f);
 787                         else
 788                                 rdev_minor = read_int(f);
 789                         rdev = MAKEDEV(rdev_major, rdev_minor);
 790                 }
 791                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 792                 file_length = 0;
 793         } else if (protocol_version < 28)
 794                 rdev = MAKEDEV(0, 0);
 795
 796 #ifdef SUPPORT_LINKS
 797         if (preserve_links && S_ISLNK(mode)) {
 798                 linkname_len = read_varint30(f) + 1; /* count the '\0' */
 799                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 800                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 801                                 linkname_len - 1);
 802                         overflow_exit("recv_file_entry");
 803                 }
 804                 if (munge_symlinks)
 805                         linkname_len += SYMLINK_PREFIX_LEN;
 806         }
 807         else
 808 #endif
 809                 linkname_len = 0;
 810
 811 #ifdef SUPPORT_HARD_LINKS
 812   create_object:
 813         if (preserve_hard_links) {
 814                 if (protocol_version < 28 && S_ISREG(mode))
 815                         xflags |= XMIT_HLINKED;
 816                 if (xflags & XMIT_HLINKED)
 817                         extra_len += (inc_recurse+1) * EXTRA_LEN;
 818         }
 819 #endif
 820
 821 #ifdef SUPPORT_ACLS
 822         /* Directories need an extra int32 for the default ACL. */
 823         if (preserve_acls && S_ISDIR(mode))
 824                 extra_len += EXTRA_LEN;
 825 #endif
 826
 827         if (always_checksum && S_ISREG(mode))
 828                 extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
 829
 830         if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
 831                 extra_len += EXTRA_LEN;
 832
 833         if (inc_recurse && S_ISDIR(mode)) {
 834                 if (one_file_system) {
 835                         /* Room to save the dir's device for -x */
 836                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 837                 }
 838                 pool = dir_flist->file_pool;
 839         } else
 840                 pool = flist->file_pool;
 841
 842 #if EXTRA_ROUNDING > 0
 843         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
 844                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
 845 #endif
 846
 847         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
 848                   + linkname_len;
 849         bp = pool_alloc(pool, alloc_len, "recv_file_entry");
 850
 851         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
 852         bp += extra_len;
 853         file = (struct file_struct *)bp;
 854         bp += FILE_STRUCT_LEN;
 855
 856         memcpy(bp, basename, basename_len);
 857         bp += basename_len;
 858
 859 #ifdef SUPPORT_HARD_LINKS
 860         if (xflags & XMIT_HLINKED)
 861                 file->flags |= FLAG_HLINKED;
 862 #endif
 863         file->modtime = (time_t)modtime;
 864         file->len32 = (uint32)file_length;
 865         if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
 866                 file->flags |= FLAG_LENGTH64;
 867                 OPT_EXTRA(file, 0)->unum = (uint32)(file_length >> 32);
 868         }
 869         file->mode = mode;
 870         if (preserve_uid)
 871                 F_OWNER(file) = uid;
 872         if (preserve_gid) {
 873                 F_GROUP(file) = gid;
 874                 file->flags |= gid_flags;
 875         }
 876         if (unsort_ndx)
 877                 F_NDX(file) = flist->used + flist->ndx_start;
 878
 879         if (basename != thisname) {
 880                 file->dirname = lastdir;
 881                 F_DEPTH(file) = lastdir_depth + 1;
 882         } else
 883                 F_DEPTH(file) = 1;
 884
 885         if (S_ISDIR(mode)) {
 886                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
 887                         F_DEPTH(file)--;
 888                 if (protocol_version >= 30) {
 889                         if (!(xflags & XMIT_NO_CONTENT_DIR)) {
 890                                 if (xflags & XMIT_TOP_DIR)
 891                                         file->flags |= FLAG_TOP_DIR;
 892                                 file->flags |= FLAG_CONTENT_DIR;
 893                         } else if (xflags & XMIT_TOP_DIR)
 894                                 file->flags |= FLAG_IMPLIED_DIR;
 895                 } else if (xflags & XMIT_TOP_DIR) {
 896                         in_del_hier = recurse;
 897                         del_hier_name_len = F_DEPTH(file) == 0 ? 0 : l1 + l2;
 898                         if (relative_paths && del_hier_name_len > 2
 899                             && lastname[del_hier_name_len-1] == '.'
 900                             && lastname[del_hier_name_len-2] == '/')
 901                                 del_hier_name_len -= 2;
 902                         file->flags |= FLAG_TOP_DIR | FLAG_CONTENT_DIR;
 903                 } else if (in_del_hier) {
 904                         if (!relative_paths || !del_hier_name_len
 905                          || (l1 >= del_hier_name_len
 906                           && lastname[del_hier_name_len] == '/'))
 907                                 file->flags |= FLAG_CONTENT_DIR;
 908                         else
 909                                 in_del_hier = 0;
 910                 }
 911         }
 912
 913         if ((preserve_devices && IS_DEVICE(mode))
 914          || (preserve_specials && IS_SPECIAL(mode))) {
 915                 uint32 *devp = F_RDEV_P(file);
 916                 DEV_MAJOR(devp) = major(rdev);
 917                 DEV_MINOR(devp) = minor(rdev);
 918         }
 919
 920 #ifdef SUPPORT_LINKS
 921         if (linkname_len) {
 922                 if (first_hlink_ndx >= flist->ndx_start) {
 923                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 924                         memcpy(bp, F_SYMLINK(first), linkname_len);
 925                 } else if (munge_symlinks) {
 926                         strlcpy(bp, SYMLINK_PREFIX, linkname_len);
 927                         bp += SYMLINK_PREFIX_LEN;
 928                         linkname_len -= SYMLINK_PREFIX_LEN;
 929                         read_sbuf(f, bp, linkname_len - 1);
 930                 } else {
 931                         read_sbuf(f, bp, linkname_len - 1);
 932                         if (sanitize_paths)
 933                                 sanitize_path(bp, bp, "", lastdir_depth);
 934                 }
 935         }
 936 #endif
 937
 938 #ifdef SUPPORT_HARD_LINKS
 939         if (preserve_hard_links && xflags & XMIT_HLINKED) {
 940                 if (protocol_version >= 30) {
 941                         if (xflags & XMIT_HLINK_FIRST) {
 942                                 F_HL_GNUM(file) = flist->ndx_start + flist->used;
 943                         } else
 944                                 F_HL_GNUM(file) = first_hlink_ndx;
 945                 } else {
 946                         static int32 cnt = 0;
 947                         struct ht_int64_node *np;
 948                         int64 ino;
 949                         int32 ndx;
 950                         if (protocol_version < 26) {
 951                                 dev = read_int(f);
 952                                 ino = read_int(f);
 953                         } else {
 954                                 if (!(xflags & XMIT_SAME_DEV_pre30))
 955                                         dev = read_longint(f);
 956                                 ino = read_longint(f);
 957                         }
 958                         np = idev_find(dev, ino);
 959                         ndx = (int32)(long)np->data - 1;
 960                         if (ndx < 0) {
 961                                 ndx = cnt++;
 962                                 np->data = (void*)(long)cnt;
 963                         }
 964                         F_HL_GNUM(file) = ndx;
 965                 }
 966         }
 967 #endif
 968
 969         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 970                 if (S_ISREG(mode))
 971                         bp = F_SUM(file);
 972                 else {
 973                         /* Prior to 28, we get a useless set of nulls. */
 974                         bp = tmp_sum;
 975                 }
 976                 if (first_hlink_ndx >= flist->ndx_start) {
 977                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 978                         memcpy(bp, F_SUM(first), checksum_len);
 979                 } else
 980                         read_buf(f, bp, checksum_len);
 981         }
 982
 983 #ifdef SUPPORT_ACLS
 984         if (preserve_acls && !S_ISLNK(mode))
 985                 receive_acl(file, f);
 986 #endif
 987 #ifdef SUPPORT_XATTRS
 988         if (preserve_xattrs)
 989                 receive_xattr(file, f );
 990 #endif
 991
 992         if (S_ISREG(mode) || S_ISLNK(mode))
 993                 stats.total_size += file_length;
 994
 995         return file;
 996 }
 997
 998 /* Create a file_struct for a named file by reading its stat() information
 999  * and performing extensive checks against global options.
1000  *
1001  * Returns a pointer to the new file struct, or NULL if there was an error
1002  * or this file should be excluded. */
1003 struct file_struct *make_file(const char *fname, struct file_list *flist,
1004                               STRUCT_STAT *stp, int flags, int filter_level)
1005 {
1006         static char *lastdir;
1007         static int lastdir_len = -1;
1008         struct file_struct *file;
1009         char thisname[MAXPATHLEN];
1010         char linkname[MAXPATHLEN];
1011         int alloc_len, basename_len, linkname_len;
1012         int extra_len = file_extra_cnt * EXTRA_LEN;
1013         const char *basename;
1014         alloc_pool_t *pool;
1015         STRUCT_STAT st;
1016         char *bp;
1017
1018         if (strlcpy(thisname, fname, sizeof thisname) >= sizeof thisname) {
1019                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
1020                 return NULL;
1021         }
1022         clean_fname(thisname, 0);
1023         if (sanitize_paths)
1024                 sanitize_path(thisname, thisname, "", 0);
1025
1026         if (stp && S_ISDIR(stp->st_mode)) {
1027                 st = *stp; /* Needed for "symlink/." with --relative. */
1028                 *linkname = '\0'; /* make IBM code checker happy */
1029         } else if (readlink_stat(thisname, &st, linkname) != 0) {
1030                 int save_errno = errno;
1031                 /* See if file is excluded before reporting an error. */
1032                 if (filter_level != NO_FILTERS
1033                  && (is_excluded(thisname, 0, filter_level)
1034                   || is_excluded(thisname, 1, filter_level))) {
1035                         if (ignore_perishable && save_errno != ENOENT)
1036                                 non_perishable_cnt++;
1037                         return NULL;
1038                 }
1039                 if (save_errno == ENOENT) {
1040 #ifdef SUPPORT_LINKS
1041                         /* When our options tell us to follow a symlink that
1042                          * points nowhere, tell the user about the symlink
1043                          * instead of giving a "vanished" message.  We only
1044                          * dereference a symlink if one of the --copy*links
1045                          * options was specified, so there's no need for the
1046                          * extra lstat() if one of these options isn't on. */
1047                         if ((copy_links || copy_unsafe_links || copy_dirlinks)
1048                          && x_lstat(thisname, &st, NULL) == 0
1049                          && S_ISLNK(st.st_mode)) {
1050                                 io_error |= IOERR_GENERAL;
1051                                 rprintf(FERROR_XFER, "symlink has no referent: %s\n",
1052                                         full_fname(thisname));
1053                         } else
1054 #endif
1055                         {
1056                                 enum logcode c = am_daemon && protocol_version < 28
1057                                                ? FERROR : FWARNING;
1058                                 io_error |= IOERR_VANISHED;
1059                                 rprintf(c, "file has vanished: %s\n",
1060                                         full_fname(thisname));
1061                         }
1062                 } else {
1063                         io_error |= IOERR_GENERAL;
1064                         rsyserr(FERROR_XFER, save_errno, "readlink %s failed",
1065                                 full_fname(thisname));
1066                 }
1067                 return NULL;
1068         }
1069
1070         /* backup.c calls us with filter_level set to NO_FILTERS. */
1071         if (filter_level == NO_FILTERS)
1072                 goto skip_filters;
1073
1074         if (S_ISDIR(st.st_mode)) {
1075                 if (!xfer_dirs) {
1076                         rprintf(FINFO, "skipping directory %s\n", thisname);
1077                         return NULL;
1078                 }
1079                 /* -x only affects dirs because we need to avoid recursing
1080                  * into a mount-point directory, not to avoid copying a
1081                  * symlinked file if -L (or similar) was specified. */
1082                 if (one_file_system && st.st_dev != filesystem_dev
1083                  && BITS_SETnUNSET(flags, FLAG_CONTENT_DIR, FLAG_TOP_DIR)) {
1084                         if (one_file_system > 1) {
1085                                 if (verbose > 1) {
1086                                         rprintf(FINFO,
1087                                             "[%s] skipping mount-point dir %s\n",
1088                                             who_am_i(), thisname);
1089                                 }
1090                                 return NULL;
1091                         }
1092                         flags |= FLAG_MOUNT_DIR;
1093                         flags &= ~FLAG_CONTENT_DIR;
1094                 }
1095         } else
1096                 flags &= ~FLAG_CONTENT_DIR;
1097
1098         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level)) {
1099                 if (ignore_perishable)
1100                         non_perishable_cnt++;
1101                 return NULL;
1102         }
1103
1104         if (lp_ignore_nonreadable(module_id)) {
1105 #ifdef SUPPORT_LINKS
1106                 if (!S_ISLNK(st.st_mode))
1107 #endif
1108                         if (access(thisname, R_OK) != 0)
1109                                 return NULL;
1110         }
1111
1112   skip_filters:
1113
1114         /* Only divert a directory in the main transfer. */
1115         if (flist) {
1116                 if (flist->prev && S_ISDIR(st.st_mode)
1117                  && flags & FLAG_DIVERT_DIRS) {
1118                         /* Room for parent/sibling/next-child info. */
1119                         extra_len += DIRNODE_EXTRA_CNT * EXTRA_LEN;
1120                         if (relative_paths)
1121                                 extra_len += PTR_EXTRA_CNT * EXTRA_LEN;
1122                         pool = dir_flist->file_pool;
1123                 } else
1124                         pool = flist->file_pool;
1125         } else {
1126 #ifdef SUPPORT_ACLS
1127                 /* Directories need an extra int32 for the default ACL. */
1128                 if (preserve_acls && S_ISDIR(st.st_mode))
1129                         extra_len += EXTRA_LEN;
1130 #endif
1131                 pool = NULL;
1132         }
1133
1134         if (verbose > 2) {
1135                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
1136                         who_am_i(), thisname, filter_level);
1137         }
1138
1139         if ((basename = strrchr(thisname, '/')) != NULL) {
1140                 int len = basename++ - thisname;
1141                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
1142                         lastdir = new_array(char, len + 1);
1143                         memcpy(lastdir, thisname, len);
1144                         lastdir[len] = '\0';
1145                         lastdir_len = len;
1146                 }
1147         } else
1148                 basename = thisname;
1149         basename_len = strlen(basename) + 1; /* count the '\0' */
1150
1151 #ifdef SUPPORT_LINKS
1152         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
1153 #else
1154         linkname_len = 0;
1155 #endif
1156
1157         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
1158                 extra_len += EXTRA_LEN;
1159
1160 #if EXTRA_ROUNDING > 0
1161         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
1162                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
1163 #endif
1164
1165         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
1166                   + linkname_len;
1167         if (pool)
1168                 bp = pool_alloc(pool, alloc_len, "make_file");
1169         else {
1170                 if (!(bp = new_array(char, alloc_len)))
1171                         out_of_memory("make_file");
1172         }
1173
1174         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
1175         bp += extra_len;
1176         file = (struct file_struct *)bp;
1177         bp += FILE_STRUCT_LEN;
1178
1179         memcpy(bp, basename, basename_len);
1180         bp += basename_len;
1181
1182 #ifdef SUPPORT_HARD_LINKS
1183         if (preserve_hard_links && flist && flist->prev) {
1184                 if (protocol_version >= 28
1185                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
1186                  : S_ISREG(st.st_mode)) {
1187                         tmp_dev = st.st_dev;
1188                         tmp_ino = st.st_ino;
1189                 } else
1190                         tmp_dev = 0;
1191         }
1192 #endif
1193
1194 #ifdef HAVE_STRUCT_STAT_ST_RDEV
1195         if (IS_DEVICE(st.st_mode) || IS_SPECIAL(st.st_mode)) {
1196                 tmp_rdev = st.st_rdev;
1197                 st.st_size = 0;
1198         }
1199 #endif
1200
1201         file->flags = flags;
1202         file->modtime = st.st_mtime;
1203         file->len32 = (uint32)st.st_size;
1204         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
1205                 file->flags |= FLAG_LENGTH64;
1206                 OPT_EXTRA(file, 0)->unum = (uint32)(st.st_size >> 32);
1207         }
1208         file->mode = st.st_mode;
1209         if (uid_ndx) /* Check uid_ndx instead of preserve_uid for del support */
1210                 F_OWNER(file) = st.st_uid;
1211         if (gid_ndx) /* Check gid_ndx instead of preserve_gid for del support */
1212                 F_GROUP(file) = st.st_gid;
1213
1214         if (basename != thisname)
1215                 file->dirname = lastdir;
1216
1217 #ifdef SUPPORT_LINKS
1218         if (linkname_len)
1219                 memcpy(bp, linkname, linkname_len);
1220 #endif
1221
1222         if (always_checksum && am_sender && S_ISREG(st.st_mode))
1223                 file_checksum(thisname, tmp_sum, st.st_size);
1224
1225         if (am_sender)
1226                 F_PATHNAME(file) = pathname;
1227         else if (!pool)
1228                 F_DEPTH(file) = extra_len / EXTRA_LEN;
1229
1230         /* This code is only used by the receiver when it is building
1231          * a list of files for a delete pass. */
1232         if (keep_dirlinks && linkname_len && flist) {
1233                 STRUCT_STAT st2;
1234                 int save_mode = file->mode;
1235                 file->mode = S_IFDIR; /* Find a directory with our name. */
1236                 if (flist_find(dir_flist, file) >= 0
1237                  && x_stat(thisname, &st2, NULL) == 0 && S_ISDIR(st2.st_mode)) {
1238                         file->modtime = st2.st_mtime;
1239                         file->len32 = 0;
1240                         file->mode = st2.st_mode;
1241                         if (uid_ndx)
1242                                 F_OWNER(file) = st2.st_uid;
1243                         if (gid_ndx)
1244                                 F_GROUP(file) = st2.st_gid;
1245                 } else
1246                         file->mode = save_mode;
1247         }
1248
1249         if (basename_len == 0+1) {
1250                 if (!pool)
1251                         unmake_file(file);
1252                 return NULL;
1253         }
1254
1255         if (unsort_ndx)
1256                 F_NDX(file) = dir_count;
1257
1258         return file;
1259 }
1260
1261 /* Only called for temporary file_struct entries created by make_file(). */
1262 void unmake_file(struct file_struct *file)
1263 {
1264         free(REQ_EXTRA(file, F_DEPTH(file)));
1265 }
1266
1267 static struct file_struct *send_file_name(int f, struct file_list *flist,
1268                                           char *fname, STRUCT_STAT *stp,
1269                                           int flags, int filter_level)
1270 {
1271         struct file_struct *file;
1272 #if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
1273         stat_x sx;
1274 #endif
1275
1276         file = make_file(fname, flist, stp, flags, filter_level);
1277         if (!file)
1278                 return NULL;
1279
1280         if (chmod_modes && !S_ISLNK(file->mode))
1281                 file->mode = tweak_mode(file->mode, chmod_modes);
1282
1283 #ifdef SUPPORT_ACLS
1284         if (preserve_acls && !S_ISLNK(file->mode) && f >= 0) {
1285                 sx.st.st_mode = file->mode;
1286                 sx.acc_acl = sx.def_acl = NULL;
1287                 if (get_acl(fname, &sx) < 0)
1288                         return NULL;
1289         }
1290 #endif
1291 #ifdef SUPPORT_XATTRS
1292         if (preserve_xattrs && f >= 0) {
1293                 sx.xattr = NULL;
1294                 if (get_xattr(fname, &sx) < 0)
1295                         return NULL;
1296         }
1297 #endif
1298
1299         maybe_emit_filelist_progress(flist->used + flist_count_offset);
1300
1301         flist_expand(flist, 1);
1302         flist->files[flist->used++] = file;
1303         if (f >= 0) {
1304                 send_file_entry(f, file, flist->used - 1, flist->ndx_start);
1305 #ifdef SUPPORT_ACLS
1306                 if (preserve_acls && !S_ISLNK(file->mode)) {
1307                         send_acl(&sx, f);
1308                         free_acl(&sx);
1309                 }
1310 #endif
1311 #ifdef SUPPORT_XATTRS
1312                 if (preserve_xattrs) {
1313                         F_XATTR(file) = send_xattr(&sx, f);
1314                         free_xattr(&sx);
1315                 }
1316 #endif
1317         }
1318         return file;
1319 }
1320
1321 static void send_if_directory(int f, struct file_list *flist,
1322                               struct file_struct *file,
1323                               char *fbuf, unsigned int ol,
1324                               int flags)
1325 {
1326         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1327
1328         if (S_ISDIR(file->mode)
1329             && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) {
1330                 void *save_filters;
1331                 unsigned int len = strlen(fbuf);
1332                 if (len > 1 && fbuf[len-1] == '/')
1333                         fbuf[--len] = '\0';
1334                 if (len >= MAXPATHLEN - 1) {
1335                         io_error |= IOERR_GENERAL;
1336                         rprintf(FERROR_XFER, "skipping long-named directory: %s\n",
1337                                 full_fname(fbuf));
1338                         return;
1339                 }
1340                 save_filters = push_local_filters(fbuf, len);
1341                 send_directory(f, flist, fbuf, len, flags);
1342                 pop_local_filters(save_filters);
1343                 fbuf[ol] = '\0';
1344                 if (is_dot_dir)
1345                         fbuf[ol-1] = '.';
1346         }
1347 }
1348
1349 static int file_compare(const void *file1, const void *file2)
1350 {
1351         return f_name_cmp(*(struct file_struct **)file1,
1352                           *(struct file_struct **)file2);
1353 }
1354
1355 /* The guts of a merge-sort algorithm.  This was derived from the glibc
1356  * version, but I (Wayne) changed the merge code to do less copying and
1357  * to require only half the amount of temporary memory. */
1358 static void fsort_tmp(struct file_struct **fp, size_t num,
1359                       struct file_struct **tmp)
1360 {
1361         struct file_struct **f1, **f2, **t;
1362         size_t n1, n2;
1363
1364         n1 = num / 2;
1365         n2 = num - n1;
1366         f1 = fp;
1367         f2 = fp + n1;
1368
1369         if (n1 > 1)
1370                 fsort_tmp(f1, n1, tmp);
1371         if (n2 > 1)
1372                 fsort_tmp(f2, n2, tmp);
1373
1374         while (f_name_cmp(*f1, *f2) <= 0) {
1375                 if (!--n1)
1376                         return;
1377                 f1++;
1378         }
1379
1380         t = tmp;
1381         memcpy(t, f1, n1 * PTR_SIZE);
1382
1383         *f1++ = *f2++, n2--;
1384
1385         while (n1 > 0 && n2 > 0) {
1386                 if (f_name_cmp(*t, *f2) <= 0)
1387                         *f1++ = *t++, n1--;
1388                 else
1389                         *f1++ = *f2++, n2--;
1390         }
1391
1392         if (n1 > 0)
1393                 memcpy(f1, t, n1 * PTR_SIZE);
1394 }
1395
1396 /* This file-struct sorting routine makes sure that any identical names in
1397  * the file list stay in the same order as they were in the original list.
1398  * This is particularly vital in inc_recurse mode where we expect a sort
1399  * on the flist to match the exact order of a sort on the dir_flist. */
1400 static void fsort(struct file_struct **fp, size_t num)
1401 {
1402         if (num <= 1)
1403                 return;
1404
1405         if (use_qsort)
1406                 qsort(fp, num, PTR_SIZE, file_compare);
1407         else {
1408                 struct file_struct **tmp = new_array(struct file_struct *,
1409                                                      (num+1) / 2);
1410                 fsort_tmp(fp, num, tmp);
1411                 free(tmp);
1412         }
1413 }
1414
1415 /* We take an entire set of sibling dirs from the sorted flist and link them
1416  * into the tree, setting the appropriate parent/child/sibling pointers. */
1417 static void add_dirs_to_tree(int parent_ndx, struct file_list *from_flist,
1418                              int dir_cnt)
1419 {
1420         int i;
1421         int32 *dp = NULL;
1422         int32 *parent_dp = parent_ndx < 0 ? NULL
1423                          : F_DIR_NODE_P(dir_flist->sorted[parent_ndx]);
1424
1425         flist_expand(dir_flist, dir_cnt);
1426         dir_flist->sorted = dir_flist->files;
1427
1428         for (i = 0; dir_cnt; i++) {
1429                 struct file_struct *file = from_flist->sorted[i];
1430
1431                 if (!S_ISDIR(file->mode))
1432                         continue;
1433
1434                 dir_flist->files[dir_flist->used++] = file;
1435                 dir_cnt--;
1436
1437                 if (file->basename[0] == '.' && file->basename[1] == '\0')
1438                         continue;
1439
1440                 if (dp)
1441                         DIR_NEXT_SIBLING(dp) = dir_flist->used - 1;
1442                 else if (parent_dp)
1443                         DIR_FIRST_CHILD(parent_dp) = dir_flist->used - 1;
1444                 else
1445                         send_dir_ndx = dir_flist->used - 1;
1446
1447                 dp = F_DIR_NODE_P(file);
1448                 DIR_PARENT(dp) = parent_ndx;
1449                 DIR_FIRST_CHILD(dp) = -1;
1450         }
1451         if (dp)
1452                 DIR_NEXT_SIBLING(dp) = -1;
1453 }
1454
1455 /* This function is normally called by the sender, but the receiving side also
1456  * calls it from get_dirlist() with f set to -1 so that we just construct the
1457  * file list in memory without sending it over the wire.  Also, get_dirlist()
1458  * might call this with f set to -2, which also indicates that local filter
1459  * rules should be ignored. */
1460 static void send_directory(int f, struct file_list *flist, char *fbuf, int len,
1461                            int flags)
1462 {
1463         struct dirent *di;
1464         unsigned remainder;
1465         char *p;
1466         DIR *d;
1467         int divert_dirs = (flags & FLAG_DIVERT_DIRS) != 0;
1468         int start = flist->used;
1469         int filter_level = f == -2 ? SERVER_FILTERS : ALL_FILTERS;
1470
1471         assert(flist != NULL);
1472
1473         if (!(d = opendir(fbuf))) {
1474                 io_error |= IOERR_GENERAL;
1475                 rsyserr(FERROR_XFER, errno, "opendir %s failed", full_fname(fbuf));
1476                 return;
1477         }
1478
1479         p = fbuf + len;
1480         if (len != 1 || *fbuf != '/')
1481                 *p++ = '/';
1482         *p = '\0';
1483         remainder = MAXPATHLEN - (p - fbuf);
1484
1485         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1486                 char *dname = d_name(di);
1487                 if (dname[0] == '.' && (dname[1] == '\0'
1488                     || (dname[1] == '.' && dname[2] == '\0')))
1489                         continue;
1490                 if (strlcpy(p, dname, remainder) >= remainder) {
1491                         io_error |= IOERR_GENERAL;
1492                         rprintf(FINFO,
1493                                 "cannot send long-named file %s\n",
1494                                 full_fname(fbuf));
1495                         continue;
1496                 }
1497                 if (dname[0] == '\0') {
1498                         io_error |= IOERR_GENERAL;
1499                         rprintf(FINFO,
1500                                 "cannot send file with empty name in %s\n",
1501                                 full_fname(fbuf));
1502                         continue;
1503                 }
1504
1505                 send_file_name(f, flist, fbuf, NULL, flags, filter_level);
1506         }
1507
1508         fbuf[len] = '\0';
1509
1510         if (errno) {
1511                 io_error |= IOERR_GENERAL;
1512                 rsyserr(FERROR_XFER, errno, "readdir(%s)", full_fname(fbuf));
1513         }
1514
1515         closedir(d);
1516
1517         if (f >= 0 && recurse && !divert_dirs) {
1518                 int i, end = flist->used - 1;
1519                 /* send_if_directory() bumps flist->used, so use "end". */
1520                 for (i = start; i <= end; i++)
1521                         send_if_directory(f, flist, flist->files[i], fbuf, len, flags);
1522         }
1523 }
1524
1525 static char lastpath[MAXPATHLEN] = "";
1526 static int lastpath_len = 0;
1527 static struct file_struct *lastpath_struct;
1528
1529 static void send_implied_dirs(int f, struct file_list *flist, char *fname,
1530                               char *start, char *limit, int flags, char name_type)
1531 {
1532         struct file_struct *file;
1533         item_list *relname_list;
1534         relnamecache **rnpp;
1535         char *slash;
1536         int len, need_new_dir;
1537         struct filter_list_struct save_filter_list = filter_list;
1538
1539         flags = (flags | FLAG_IMPLIED_DIR) & ~(FLAG_TOP_DIR | FLAG_CONTENT_DIR);
1540         filter_list.head = filter_list.tail = NULL; /* Don't filter implied dirs. */
1541
1542         if (inc_recurse) {
1543                 if (lastpath_struct && F_PATHNAME(lastpath_struct) == pathname
1544                  && lastpath_len == limit - fname
1545                  && strncmp(lastpath, fname, lastpath_len) == 0)
1546                         need_new_dir = 0;
1547                 else
1548                         need_new_dir = 1;
1549         } else
1550                 need_new_dir = 1;
1551
1552         if (need_new_dir) {
1553                 int save_copy_links = copy_links;
1554                 int save_xfer_dirs = xfer_dirs;
1555
1556                 copy_links = xfer_dirs = 1;
1557
1558                 *limit = '\0';
1559
1560                 for (slash = start; (slash = strchr(slash+1, '/')) != NULL; ) {
1561                         *slash = '\0';
1562                         send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1563                         *slash = '/';
1564                 }
1565
1566                 file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1567                 if (inc_recurse) {
1568                         if (file && !S_ISDIR(file->mode))
1569                                 file = NULL;
1570                         lastpath_struct = file;
1571                 }
1572
1573                 strlcpy(lastpath, fname, sizeof lastpath);
1574                 lastpath_len = limit - fname;
1575
1576                 *limit = '/';
1577
1578                 copy_links = save_copy_links;
1579                 xfer_dirs = save_xfer_dirs;
1580
1581                 if (!inc_recurse)
1582                         goto done;
1583         }
1584
1585         if (!lastpath_struct)
1586                 goto done; /* dir must have vanished */
1587
1588         len = strlen(limit+1);
1589         memcpy(&relname_list, F_DIR_RELNAMES_P(lastpath_struct), sizeof relname_list);
1590         if (!relname_list) {
1591                 if (!(relname_list = new0(item_list)))
1592                         out_of_memory("send_implied_dirs");
1593                 memcpy(F_DIR_RELNAMES_P(lastpath_struct), &relname_list, sizeof relname_list);
1594         }
1595         rnpp = EXPAND_ITEM_LIST(relname_list, relnamecache *, 32);
1596         if (!(*rnpp = (relnamecache*)new_array(char, sizeof (relnamecache) + len)))
1597                 out_of_memory("send_implied_dirs");
1598         (*rnpp)->name_type = name_type;
1599         strlcpy((*rnpp)->fname, limit+1, len + 1);
1600
1601 done:
1602         filter_list = save_filter_list;
1603 }
1604
1605 static void send1extra(int f, struct file_struct *file, struct file_list *flist)
1606 {
1607         char fbuf[MAXPATHLEN];
1608         item_list *relname_list;
1609         int len, dlen, flags = FLAG_DIVERT_DIRS | FLAG_CONTENT_DIR;
1610         size_t j;
1611
1612         f_name(file, fbuf);
1613         dlen = strlen(fbuf);
1614
1615         if (F_PATHNAME(file) != pathname) {
1616                 if (!push_pathname(F_PATHNAME(file), -1))
1617                         exit_cleanup(RERR_FILESELECT);
1618         }
1619
1620         change_local_filter_dir(fbuf, dlen, send_dir_depth);
1621
1622         if (file->flags & FLAG_CONTENT_DIR) {
1623                 if (one_file_system) {
1624                         STRUCT_STAT st;
1625                         if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1626                                 io_error |= IOERR_GENERAL;
1627                                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1628                                         full_fname(fbuf));
1629                                 return;
1630                         }
1631                         filesystem_dev = st.st_dev;
1632                 }
1633                 send_directory(f, flist, fbuf, dlen, flags);
1634         }
1635
1636         if (!relative_paths)
1637                 return;
1638
1639         memcpy(&relname_list, F_DIR_RELNAMES_P(file), sizeof relname_list);
1640         if (!relname_list)
1641                 return;
1642
1643         for (j = 0; j < relname_list->count; j++) {
1644                 char *slash;
1645                 relnamecache *rnp = ((relnamecache**)relname_list->items)[j];
1646                 char name_type = rnp->name_type;
1647
1648                 fbuf[dlen] = '/';
1649                 len = strlcpy(fbuf + dlen + 1, rnp->fname, sizeof fbuf - dlen - 1);
1650                 free(rnp);
1651                 if (len >= (int)sizeof fbuf)
1652                         continue; /* Impossible... */
1653
1654                 slash = strchr(fbuf+dlen+1, '/');
1655                 if (slash) {
1656                         send_implied_dirs(f, flist, fbuf, fbuf+dlen+1, slash, flags, name_type);
1657                         continue;
1658                 }
1659
1660                 if (name_type != NORMAL_NAME) {
1661                         STRUCT_STAT st;
1662                         if (link_stat(fbuf, &st, 1) != 0) {
1663                                 io_error |= IOERR_GENERAL;
1664                                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1665                                         full_fname(fbuf));
1666                                 continue;
1667                         }
1668                         send_file_name(f, flist, fbuf, &st, FLAG_TOP_DIR | flags, ALL_FILTERS);
1669                 } else
1670                         send_file_name(f, flist, fbuf, NULL, FLAG_TOP_DIR | flags, ALL_FILTERS);
1671         }
1672
1673         free(relname_list);
1674 }
1675
1676 void send_extra_file_list(int f, int at_least)
1677 {
1678         struct file_list *flist;
1679         int64 start_write;
1680         uint16 prev_flags;
1681         int old_cnt, save_io_error = io_error;
1682
1683         if (flist_eof)
1684                 return;
1685
1686         /* Keep sending data until we have the requested number of
1687          * files in the upcoming file-lists. */
1688         old_cnt = cur_flist->used;
1689         for (flist = first_flist; flist != cur_flist; flist = flist->next)
1690                 old_cnt += flist->used;
1691         while (file_total - old_cnt < at_least) {
1692                 struct file_struct *file = dir_flist->sorted[send_dir_ndx];
1693                 int dir_ndx, dstart = dir_count;
1694                 const char *pathname = F_PATHNAME(file);
1695                 int32 *dp;
1696
1697                 flist = flist_new(0, "send_extra_file_list");
1698                 start_write = stats.total_written;
1699
1700                 if (unsort_ndx)
1701                         dir_ndx = F_NDX(file);
1702                 else
1703                         dir_ndx = send_dir_ndx;
1704                 write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
1705                 flist->parent_ndx = dir_ndx;
1706
1707                 send1extra(f, file, flist);
1708                 prev_flags = file->flags;
1709                 dp = F_DIR_NODE_P(file);
1710
1711                 /* If there are any duplicate directory names that follow, we
1712                  * send all the dirs together in one file-list.  The dir_flist
1713                  * tree links all the child subdirs onto the last dup dir. */
1714                 while ((dir_ndx = DIR_NEXT_SIBLING(dp)) >= 0
1715                     && dir_flist->sorted[dir_ndx]->flags & FLAG_DUPLICATE) {
1716                         send_dir_ndx = dir_ndx;
1717                         file = dir_flist->sorted[dir_ndx];
1718                         /* Try to avoid some duplicate scanning of identical dirs. */
1719                         if (F_PATHNAME(file) == pathname && prev_flags & FLAG_CONTENT_DIR)
1720                                 file->flags &= ~FLAG_CONTENT_DIR;
1721                         send1extra(f, file, flist);
1722                         prev_flags = file->flags;
1723                         dp = F_DIR_NODE_P(file);
1724                 }
1725
1726                 write_byte(f, 0);
1727
1728                 if (need_unsorted_flist) {
1729                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
1730                                 out_of_memory("send_extra_file_list");
1731                         memcpy(flist->sorted, flist->files,
1732                                flist->used * sizeof (struct file_struct*));
1733                 } else
1734                         flist->sorted = flist->files;
1735
1736                 flist_sort_and_clean(flist, 0);
1737
1738                 add_dirs_to_tree(send_dir_ndx, flist, dir_count - dstart);
1739                 flist_done_allocating(flist);
1740
1741                 file_total += flist->used;
1742                 stats.flist_size += stats.total_written - start_write;
1743                 stats.num_files += flist->used;
1744                 if (verbose > 3)
1745                         output_flist(flist);
1746
1747                 if (DIR_FIRST_CHILD(dp) >= 0) {
1748                         send_dir_ndx = DIR_FIRST_CHILD(dp);
1749                         send_dir_depth++;
1750                 } else {
1751                         while (DIR_NEXT_SIBLING(dp) < 0) {
1752                                 if ((send_dir_ndx = DIR_PARENT(dp)) < 0) {
1753                                         write_ndx(f, NDX_FLIST_EOF);
1754                                         flist_eof = 1;
1755                                         change_local_filter_dir(NULL, 0, 0);
1756                                         goto finish;
1757                                 }
1758                                 send_dir_depth--;
1759                                 file = dir_flist->sorted[send_dir_ndx];
1760                                 dp = F_DIR_NODE_P(file);
1761                         }
1762                         send_dir_ndx = DIR_NEXT_SIBLING(dp);
1763                 }
1764         }
1765
1766   finish:
1767         if (io_error != save_io_error && !ignore_errors)
1768                 send_msg_int(MSG_IO_ERROR, io_error);
1769 }
1770
1771 struct file_list *send_file_list(int f, int argc, char *argv[])
1772 {
1773         static const char *lastdir;
1774         static int lastdir_len = -1;
1775         int len, dirlen;
1776         STRUCT_STAT st;
1777         char *p, *dir;
1778         struct file_list *flist;
1779         struct timeval start_tv, end_tv;
1780         int64 start_write;
1781         int use_ff_fd = 0;
1782         int disable_buffering;
1783         int flags = recurse ? FLAG_CONTENT_DIR : 0;
1784         int reading_remotely = filesfrom_host != NULL;
1785         int rl_flags = (reading_remotely ? 0 : RL_DUMP_COMMENTS)
1786 #ifdef ICONV_OPTION
1787                      | (filesfrom_convert ? RL_CONVERT : 0)
1788 #endif
1789                      | (eol_nulls || reading_remotely ? RL_EOL_NULLS : 0);
1790
1791         rprintf(FLOG, "building file list\n");
1792         if (show_filelist_p())
1793                 start_filelist_progress("building file list");
1794         else if (inc_recurse && verbose && !am_server)
1795                 rprintf(FCLIENT, "sending incremental file list\n");
1796
1797         start_write = stats.total_written;
1798         gettimeofday(&start_tv, NULL);
1799
1800         if (relative_paths && protocol_version >= 30)
1801                 implied_dirs = 1; /* We send flagged implied dirs */
1802
1803 #ifdef SUPPORT_HARD_LINKS
1804         if (preserve_hard_links && protocol_version >= 30 && !cur_flist)
1805                 init_hard_links();
1806 #endif
1807
1808         flist = cur_flist = flist_new(0, "send_file_list");
1809         if (inc_recurse) {
1810                 dir_flist = flist_new(FLIST_TEMP, "send_file_list");
1811                 flags |= FLAG_DIVERT_DIRS;
1812         } else
1813                 dir_flist = cur_flist;
1814
1815         disable_buffering = io_start_buffering_out(f);
1816         if (filesfrom_fd >= 0) {
1817                 if (argv[0] && !push_dir(argv[0], 0)) {
1818                         rsyserr(FERROR_XFER, errno, "push_dir %s failed in %s",
1819                                 full_fname(argv[0]), curr_dir);
1820                         exit_cleanup(RERR_FILESELECT);
1821                 }
1822                 use_ff_fd = 1;
1823         }
1824
1825         while (1) {
1826                 char fbuf[MAXPATHLEN], *fn, name_type;
1827
1828                 if (use_ff_fd) {
1829                         if (read_line(filesfrom_fd, fbuf, sizeof fbuf, rl_flags) == 0)
1830                                 break;
1831                         sanitize_path(fbuf, fbuf, "", 0);
1832                 } else {
1833                         if (argc-- == 0)
1834                                 break;
1835                         strlcpy(fbuf, *argv++, MAXPATHLEN);
1836                         if (sanitize_paths)
1837                                 sanitize_path(fbuf, fbuf, "", 0);
1838                 }
1839
1840                 len = strlen(fbuf);
1841                 if (relative_paths) {
1842                         /* We clean up fbuf below. */
1843                         name_type = NORMAL_NAME;
1844                 } else if (!len || fbuf[len - 1] == '/') {
1845                         if (len == 2 && fbuf[0] == '.') {
1846                                 /* Turn "./" into just "." rather than "./." */
1847                                 fbuf[--len] = '\0';
1848                         } else {
1849                                 if (len + 1 >= MAXPATHLEN)
1850                                         overflow_exit("send_file_list");
1851                                 fbuf[len++] = '.';
1852                                 fbuf[len] = '\0';
1853                         }
1854                         name_type = DOT_NAME;
1855                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
1856                     && (len == 2 || fbuf[len-3] == '/')) {
1857                         if (len + 2 >= MAXPATHLEN)
1858                                 overflow_exit("send_file_list");
1859                         fbuf[len++] = '/';
1860                         fbuf[len++] = '.';
1861                         fbuf[len] = '\0';
1862                         name_type = DOT_NAME;
1863                 } else if (fbuf[len-1] == '.' && (len == 1 || fbuf[len-2] == '/'))
1864                         name_type = DOT_NAME;
1865                 else
1866                         name_type = NORMAL_NAME;
1867
1868                 dir = NULL;
1869
1870                 if (!relative_paths) {
1871                         p = strrchr(fbuf, '/');
1872                         if (p) {
1873                                 *p = '\0';
1874                                 if (p == fbuf)
1875                                         dir = "/";
1876                                 else
1877                                         dir = fbuf;
1878                                 len -= p - fbuf + 1;
1879                                 fn = p + 1;
1880                         } else
1881                                 fn = fbuf;
1882                 } else {
1883                         if ((p = strstr(fbuf, "/./")) != NULL) {
1884                                 *p = '\0';
1885                                 if (p == fbuf)
1886                                         dir = "/";
1887                                 else
1888                                         dir = fbuf;
1889                                 fn = p + 3;
1890                                 while (*fn == '/')
1891                                         fn++;
1892                                 if (!*fn)
1893                                         *--fn = '\0'; /* ensure room for '.' */
1894                         } else
1895                                 fn = fbuf;
1896                         len = clean_fname(fn, CFN_KEEP_LEADING_DOT_DIR
1897                                             | CFN_KEEP_TRAILING_SLASH
1898                                             | CFN_DROP_TRAILING_DOT_DIR);
1899                         if (len == 1) {
1900                                 if (fn[0] == '/') {
1901                                         fn = "/.";
1902                                         len = 2;
1903                                         name_type = DOT_NAME;
1904                                 } else if (fn[0] == '.')
1905                                         name_type = DOT_NAME;
1906                         } else if (fn[len-1] == '/') {
1907                                 fn[--len] = '\0';
1908                                 if (len == 1 && *fn == '.')
1909                                         name_type = DOT_NAME;
1910                                 else
1911                                         name_type = SLASH_ENDING_NAME;
1912                         }
1913                         /* Reject a ".." dir in the active part of the path. */
1914                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
1915                                 if ((p[2] == '/' || p[2] == '\0')
1916                                  && (p == fn || p[-1] == '/')) {
1917                                         rprintf(FERROR,
1918                                             "found \"..\" dir in relative path: %s\n",
1919                                             fn);
1920                                         exit_cleanup(RERR_SYNTAX);
1921                                 }
1922                         }
1923                 }
1924
1925                 if (!*fn) {
1926                         len = 1;
1927                         fn = ".";
1928                         name_type = DOT_NAME;
1929                 }
1930
1931                 dirlen = dir ? strlen(dir) : 0;
1932                 if (dirlen != lastdir_len || memcmp(lastdir, dir, dirlen) != 0) {
1933                         if (!push_pathname(dir ? strdup(dir) : NULL, dirlen))
1934                                 continue;
1935                         lastdir = pathname;
1936                         lastdir_len = pathname_len;
1937                 } else if (!push_pathname(lastdir, lastdir_len))
1938                         continue;
1939
1940                 if (fn != fbuf)
1941                         memmove(fbuf, fn, len + 1);
1942
1943                 if (link_stat(fbuf, &st, copy_dirlinks || name_type != NORMAL_NAME) != 0) {
1944                         io_error |= IOERR_GENERAL;
1945                         rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1946                                 full_fname(fbuf));
1947                         continue;
1948                 }
1949
1950                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
1951                         rprintf(FINFO, "skipping directory %s\n", fbuf);
1952                         continue;
1953                 }
1954
1955                 if (inc_recurse && relative_paths && *fbuf) {
1956                         if ((p = strchr(fbuf+1, '/')) != NULL) {
1957                                 if (p - fbuf == 1 && *fbuf == '.') {
1958                                         if ((fn = strchr(p+1, '/')) != NULL)
1959                                                 p = fn;
1960                                 } else
1961                                         fn = p;
1962                                 send_implied_dirs(f, flist, fbuf, fbuf, p, flags, name_type);
1963                                 if (fn == p)
1964                                         continue;
1965                         }
1966                 } else if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
1967                         /* Send the implied directories at the start of the
1968                          * source spec, so we get their permissions right. */
1969                         char *lp = lastpath, *slash = fbuf;
1970                         *p = '\0';
1971                         /* Skip any initial directories in our path that we
1972                          * have in common with lastpath. */
1973                         for (fn = fbuf; *fn && *lp == *fn; lp++, fn++) {
1974                                 if (*fn == '/')
1975                                         slash = fn;
1976                         }
1977                         *p = '/';
1978                         if (fn != p || (*lp && *lp != '/'))
1979                                 send_implied_dirs(f, flist, fbuf, slash, p, flags, 0);
1980                 }
1981
1982                 if (one_file_system)
1983                         filesystem_dev = st.st_dev;
1984
1985                 if (recurse || (xfer_dirs && name_type != NORMAL_NAME)) {
1986                         struct file_struct *file;
1987                         int top_flags = FLAG_TOP_DIR | FLAG_CONTENT_DIR | flags;
1988                         file = send_file_name(f, flist, fbuf, &st,
1989                                               top_flags, ALL_FILTERS);
1990                         if (inc_recurse) {
1991                                 if (name_type == DOT_NAME && file) {
1992                                         if (send_dir_depth < 0) {
1993                                                 send_dir_depth = 0;
1994                                                 change_local_filter_dir(fbuf, len, send_dir_depth);
1995                                         }
1996                                         send_directory(f, flist, fbuf, len, flags);
1997                                 }
1998                         } else if (file)
1999                                 send_if_directory(f, flist, file, fbuf, len, flags);
2000                 } else
2001                         send_file_name(f, flist, fbuf, &st, flags, ALL_FILTERS);
2002         }
2003
2004         gettimeofday(&end_tv, NULL);
2005         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2006                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2007         if (stats.flist_buildtime == 0)
2008                 stats.flist_buildtime = 1;
2009         start_tv = end_tv;
2010
2011         write_byte(f, 0); /* Indicate end of file list */
2012
2013 #ifdef SUPPORT_HARD_LINKS
2014         if (preserve_hard_links && protocol_version >= 30 && !inc_recurse)
2015                 idev_destroy();
2016 #endif
2017
2018         if (show_filelist_p())
2019                 finish_filelist_progress(flist);
2020
2021         gettimeofday(&end_tv, NULL);
2022         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2023                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2024
2025         /* When converting names, both sides keep an unsorted file-list array
2026          * because the names will differ on the sending and receiving sides
2027          * (both sides will use the unsorted index number for each item). */
2028
2029         /* Sort the list without removing any duplicates.  This allows the
2030          * receiving side to ask for whatever name it kept.  For incremental
2031          * recursion mode, the sender marks duplicate dirs so that it can
2032          * send them together in a single file-list. */
2033         if (need_unsorted_flist) {
2034                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2035                         out_of_memory("send_file_list");
2036                 memcpy(flist->sorted, flist->files,
2037                        flist->used * sizeof (struct file_struct*));
2038         } else
2039                 flist->sorted = flist->files;
2040         flist_sort_and_clean(flist, 0);
2041         file_total += flist->used;
2042
2043         if (numeric_ids <= 0 && !inc_recurse)
2044                 send_id_list(f);
2045
2046         /* send the io_error flag */
2047         if (protocol_version < 30)
2048                 write_int(f, ignore_errors ? 0 : io_error);
2049         else if (io_error && !ignore_errors)
2050                 send_msg_int(MSG_IO_ERROR, io_error);
2051
2052         if (disable_buffering)
2053                 io_end_buffering_out();
2054
2055         stats.flist_size = stats.total_written - start_write;
2056         stats.num_files = flist->used;
2057
2058         if (verbose > 3)
2059                 output_flist(flist);
2060
2061         if (verbose > 2)
2062                 rprintf(FINFO, "send_file_list done\n");
2063
2064         if (inc_recurse) {
2065                 send_dir_depth = 1;
2066                 add_dirs_to_tree(-1, flist, dir_count);
2067                 if (!file_total || strcmp(flist->sorted[0]->basename, ".") != 0)
2068                         flist->parent_ndx = -1;
2069                 flist_done_allocating(flist);
2070                 if (send_dir_ndx < 0) {
2071                         write_ndx(f, NDX_FLIST_EOF);
2072                         flist_eof = 1;
2073                 }
2074                 else if (file_total == 1) {
2075                         /* If we're creating incremental file-lists and there
2076                          * was just 1 item in the first file-list, send 1 more
2077                          * file-list to check if this is a 1-file xfer. */
2078                         send_extra_file_list(f, 1);
2079                 }
2080         }
2081
2082         return flist;
2083 }
2084
2085 struct file_list *recv_file_list(int f)
2086 {
2087         struct file_list *flist;
2088         int dstart, flags;
2089         int64 start_read;
2090
2091         if (!first_flist)
2092                 rprintf(FLOG, "receiving file list\n");
2093         if (show_filelist_p())
2094                 start_filelist_progress("receiving file list");
2095         else if (inc_recurse && verbose && !am_server && !first_flist)
2096                 rprintf(FCLIENT, "receiving incremental file list\n");
2097
2098         start_read = stats.total_read;
2099
2100 #ifdef SUPPORT_HARD_LINKS
2101         if (preserve_hard_links && !first_flist)
2102                 init_hard_links();
2103 #endif
2104
2105         flist = flist_new(0, "recv_file_list");
2106
2107         if (inc_recurse) {
2108                 if (flist->ndx_start == 1)
2109                         dir_flist = flist_new(FLIST_TEMP, "recv_file_list");
2110                 dstart = dir_flist->used;
2111         } else {
2112                 dir_flist = flist;
2113                 dstart = 0;
2114         }
2115
2116         while ((flags = read_byte(f)) != 0) {
2117                 struct file_struct *file;
2118
2119                 flist_expand(flist, 1);
2120
2121                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
2122                         flags |= read_byte(f) << 8;
2123                 file = recv_file_entry(flist, flags, f);
2124
2125                 if (inc_recurse && S_ISDIR(file->mode)) {
2126                         flist_expand(dir_flist, 1);
2127                         dir_flist->files[dir_flist->used++] = file;
2128                 }
2129
2130                 flist->files[flist->used++] = file;
2131
2132                 maybe_emit_filelist_progress(flist->used);
2133
2134                 if (verbose > 2) {
2135                         rprintf(FINFO, "recv_file_name(%s)\n",
2136                                 f_name(file, NULL));
2137                 }
2138         }
2139         file_total += flist->used;
2140
2141         if (verbose > 2)
2142                 rprintf(FINFO, "received %d names\n", flist->used);
2143
2144         if (show_filelist_p())
2145                 finish_filelist_progress(flist);
2146
2147         if (need_unsorted_flist) {
2148                 /* Create an extra array of index pointers that we can sort for
2149                  * the generator's use (for wading through the files in sorted
2150                  * order and for calling flist_find()).  We keep the "files"
2151                  * list unsorted for our exchange of index numbers with the
2152                  * other side (since their names may not sort the same). */
2153                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2154                         out_of_memory("recv_file_list");
2155                 memcpy(flist->sorted, flist->files,
2156                        flist->used * sizeof (struct file_struct*));
2157                 if (inc_recurse && dir_flist->used > dstart) {
2158                         static int dir_flist_malloced = 0;
2159                         if (dir_flist_malloced < dir_flist->malloced) {
2160                                 dir_flist->sorted = realloc_array(dir_flist->sorted,
2161                                                         struct file_struct *,
2162                                                         dir_flist->malloced);
2163                                 dir_flist_malloced = dir_flist->malloced;
2164                         }
2165                         memcpy(dir_flist->sorted + dstart, dir_flist->files + dstart,
2166                                (dir_flist->used - dstart) * sizeof (struct file_struct*));
2167                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2168                 }
2169         } else {
2170                 flist->sorted = flist->files;
2171                 if (inc_recurse && dir_flist->used > dstart) {
2172                         dir_flist->sorted = dir_flist->files;
2173                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2174                 }
2175         }
2176
2177         if (inc_recurse)
2178                 flist_done_allocating(flist);
2179         else if (f >= 0)
2180                 recv_id_list(f, flist);
2181
2182         flist_sort_and_clean(flist, relative_paths);
2183
2184         if (protocol_version < 30) {
2185                 /* Recv the io_error flag */
2186                 if (ignore_errors)
2187                         read_int(f);
2188                 else
2189                         io_error |= read_int(f);
2190         } else if (inc_recurse && flist->ndx_start == 1) {
2191                 if (!file_total || strcmp(flist->sorted[0]->basename, ".") != 0)
2192                         flist->parent_ndx = -1;
2193         }
2194
2195         if (verbose > 3)
2196                 output_flist(flist);
2197
2198         if (verbose > 2)
2199                 rprintf(FINFO, "recv_file_list done\n");
2200
2201         stats.flist_size += stats.total_read - start_read;
2202         stats.num_files += flist->used;
2203
2204         return flist;
2205 }
2206
2207 /* This is only used once by the receiver if the very first file-list
2208  * has exactly one item in it. */
2209 void recv_additional_file_list(int f)
2210 {
2211         struct file_list *flist;
2212         int ndx = read_ndx(f);
2213         if (ndx == NDX_FLIST_EOF) {
2214                 flist_eof = 1;
2215                 change_local_filter_dir(NULL, 0, 0);
2216         } else {
2217                 ndx = NDX_FLIST_OFFSET - ndx;
2218                 if (ndx < 0 || ndx >= dir_flist->used) {
2219                         ndx = NDX_FLIST_OFFSET - ndx;
2220                         rprintf(FERROR,
2221                                 "[%s] Invalid dir index: %d (%d - %d)\n",
2222                                 who_am_i(), ndx, NDX_FLIST_OFFSET,
2223                                 NDX_FLIST_OFFSET - dir_flist->used + 1);
2224                         exit_cleanup(RERR_PROTOCOL);
2225                 }
2226                 if (verbose > 3) {
2227                         rprintf(FINFO, "[%s] receiving flist for dir %d\n",
2228                                 who_am_i(), ndx);
2229                 }
2230                 flist = recv_file_list(f);
2231                 flist->parent_ndx = ndx;
2232         }
2233 }
2234
2235 /* Search for an identically-named item in the file list.  Note that the
2236  * items must agree in their directory-ness, or no match is returned. */
2237 int flist_find(struct file_list *flist, struct file_struct *f)
2238 {
2239         int low = flist->low, high = flist->high;
2240         int diff, mid, mid_up;
2241
2242         while (low <= high) {
2243                 mid = (low + high) / 2;
2244                 if (F_IS_ACTIVE(flist->sorted[mid]))
2245                         mid_up = mid;
2246                 else {
2247                         /* Scan for the next non-empty entry using the cached
2248                          * distance values.  If the value isn't fully up-to-
2249                          * date, update it. */
2250                         mid_up = mid + F_DEPTH(flist->sorted[mid]);
2251                         if (!F_IS_ACTIVE(flist->sorted[mid_up])) {
2252                                 do {
2253                                     mid_up += F_DEPTH(flist->sorted[mid_up]);
2254                                 } while (!F_IS_ACTIVE(flist->sorted[mid_up]));
2255                                 F_DEPTH(flist->sorted[mid]) = mid_up - mid;
2256                         }
2257                         if (mid_up > high) {
2258                                 /* If there's nothing left above us, set high to
2259                                  * a non-empty entry below us and continue. */
2260                                 high = mid - (int)flist->sorted[mid]->len32;
2261                                 if (!F_IS_ACTIVE(flist->sorted[high])) {
2262                                         do {
2263                                             high -= (int)flist->sorted[high]->len32;
2264                                         } while (!F_IS_ACTIVE(flist->sorted[high]));
2265                                         flist->sorted[mid]->len32 = mid - high;
2266                                 }
2267                                 continue;
2268                         }
2269                 }
2270                 diff = f_name_cmp(flist->sorted[mid_up], f);
2271                 if (diff == 0) {
2272                         if (protocol_version < 29
2273                             && S_ISDIR(flist->sorted[mid_up]->mode)
2274                             != S_ISDIR(f->mode))
2275                                 return -1;
2276                         return mid_up;
2277                 }
2278                 if (diff < 0)
2279                         low = mid_up + 1;
2280                 else
2281                         high = mid - 1;
2282         }
2283         return -1;
2284 }
2285
2286 /*
2287  * Free up any resources a file_struct has allocated
2288  * and clear the file.
2289  */
2290 void clear_file(struct file_struct *file)
2291 {
2292         /* The +1 zeros out the first char of the basename. */
2293         memset(file, 0, FILE_STRUCT_LEN + 1);
2294         /* In an empty entry, F_DEPTH() is an offset to the next non-empty
2295          * entry.  Likewise for len32 in the opposite direction.  We assume
2296          * that we're alone for now since flist_find() will adjust the counts
2297          * it runs into that aren't up-to-date. */
2298         file->len32 = F_DEPTH(file) = 1;
2299 }
2300
2301 /* Allocate a new file list. */
2302 struct file_list *flist_new(int flags, char *msg)
2303 {
2304         struct file_list *flist;
2305
2306         if (!(flist = new0(struct file_list)))
2307                 out_of_memory(msg);
2308
2309         if (flags & FLIST_TEMP) {
2310                 if (!(flist->file_pool = pool_create(SMALL_EXTENT, 0,
2311                                                 out_of_memory, POOL_INTERN)))
2312                         out_of_memory(msg);
2313         } else {
2314                 /* This is a doubly linked list with prev looping back to
2315                  * the end of the list, but the last next pointer is NULL. */
2316                 if (!first_flist) {
2317                         flist->file_pool = pool_create(NORMAL_EXTENT, 0,
2318                                                 out_of_memory, POOL_INTERN);
2319                         if (!flist->file_pool)
2320                                 out_of_memory(msg);
2321
2322                         flist->ndx_start = flist->flist_num = inc_recurse ? 1 : 0;
2323
2324                         first_flist = cur_flist = flist->prev = flist;
2325                 } else {
2326                         struct file_list *prev = first_flist->prev;
2327
2328                         flist->file_pool = first_flist->file_pool;
2329
2330                         flist->ndx_start = prev->ndx_start + prev->used + 1;
2331                         flist->flist_num = prev->flist_num + 1;
2332
2333                         flist->prev = prev;
2334                         prev->next = first_flist->prev = flist;
2335                 }
2336                 flist->pool_boundary = pool_boundary(flist->file_pool, 0);
2337                 flist_cnt++;
2338         }
2339
2340         return flist;
2341 }
2342
2343 /* Free up all elements in a flist. */
2344 void flist_free(struct file_list *flist)
2345 {
2346         if (!flist->prev) {
2347                 /* Was FLIST_TEMP dir-list. */
2348         } else if (flist == flist->prev) {
2349                 first_flist = cur_flist = NULL;
2350                 file_total = 0;
2351                 flist_cnt = 0;
2352         } else {
2353                 if (flist == cur_flist)
2354                         cur_flist = flist->next;
2355                 if (flist == first_flist)
2356                         first_flist = first_flist->next;
2357                 else {
2358                         flist->prev->next = flist->next;
2359                         if (!flist->next)
2360                                 flist->next = first_flist;
2361                 }
2362                 flist->next->prev = flist->prev;
2363                 file_total -= flist->used;
2364                 flist_cnt--;
2365         }
2366
2367         if (!flist->prev || !flist_cnt)
2368                 pool_destroy(flist->file_pool);
2369         else
2370                 pool_free_old(flist->file_pool, flist->pool_boundary);
2371
2372         if (flist->sorted && flist->sorted != flist->files)
2373                 free(flist->sorted);
2374         free(flist->files);
2375         free(flist);
2376 }
2377
2378 /* This routine ensures we don't have any duplicate names in our file list.
2379  * duplicate names can cause corruption because of the pipelining. */
2380 static void flist_sort_and_clean(struct file_list *flist, int strip_root)
2381 {
2382         char fbuf[MAXPATHLEN];
2383         int i, prev_i;
2384
2385         if (!flist)
2386                 return;
2387         if (flist->used == 0) {
2388                 flist->high = -1;
2389                 flist->low = 0;
2390                 return;
2391         }
2392
2393         fsort(flist->sorted, flist->used);
2394
2395         if (!am_sender || inc_recurse) {
2396                 for (i = prev_i = 0; i < flist->used; i++) {
2397                         if (F_IS_ACTIVE(flist->sorted[i])) {
2398                                 prev_i = i;
2399                                 break;
2400                         }
2401                 }
2402                 flist->low = prev_i;
2403         } else {
2404                 i = prev_i = flist->used - 1;
2405                 flist->low = 0;
2406         }
2407
2408         while (++i < flist->used) {
2409                 int j;
2410                 struct file_struct *file = flist->sorted[i];
2411
2412                 if (!F_IS_ACTIVE(file))
2413                         continue;
2414                 if (f_name_cmp(file, flist->sorted[prev_i]) == 0)
2415                         j = prev_i;
2416                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
2417                         int save_mode = file->mode;
2418                         /* Make sure that this directory doesn't duplicate a
2419                          * non-directory earlier in the list. */
2420                         flist->high = prev_i;
2421                         file->mode = S_IFREG;
2422                         j = flist_find(flist, file);
2423                         file->mode = save_mode;
2424                 } else
2425                         j = -1;
2426                 if (j >= 0) {
2427                         int keep, drop;
2428                         /* If one is a dir and the other is not, we want to
2429                          * keep the dir because it might have contents in the
2430                          * list.  Otherwise keep the first one. */
2431                         if (S_ISDIR(file->mode)) {
2432                                 struct file_struct *fp = flist->sorted[j];
2433                                 if (!S_ISDIR(fp->mode))
2434                                         keep = i, drop = j;
2435                                 else {
2436                                         if (am_sender)
2437                                                 file->flags |= FLAG_DUPLICATE;
2438                                         else { /* Make sure we merge our vital flags. */
2439                                                 fp->flags |= file->flags & (FLAG_TOP_DIR|FLAG_CONTENT_DIR);
2440                                                 fp->flags &= file->flags | ~FLAG_IMPLIED_DIR;
2441                                         }
2442                                         keep = j, drop = i;
2443                                 }
2444                         } else
2445                                 keep = j, drop = i;
2446
2447                         if (!am_sender) {
2448                                 if (verbose > 1) {
2449                                         rprintf(FINFO,
2450                                             "removing duplicate name %s from file list (%d)\n",
2451                                             f_name(file, fbuf), drop + flist->ndx_start);
2452                                 }
2453                                 clear_file(flist->sorted[drop]);
2454                         }
2455
2456                         if (keep == i) {
2457                                 if (flist->low == drop) {
2458                                         for (j = drop + 1;
2459                                              j < i && !F_IS_ACTIVE(flist->sorted[j]);
2460                                              j++) {}
2461                                         flist->low = j;
2462                                 }
2463                                 prev_i = i;
2464                         }
2465                 } else
2466                         prev_i = i;
2467         }
2468         flist->high = prev_i;
2469
2470         if (strip_root) {
2471                 /* We need to strip off the leading slashes for relative
2472                  * paths, but this must be done _after_ the sorting phase. */
2473                 for (i = flist->low; i <= flist->high; i++) {
2474                         struct file_struct *file = flist->sorted[i];
2475
2476                         if (!file->dirname)
2477                                 continue;
2478                         while (*file->dirname == '/')
2479                                 file->dirname++;
2480                         if (!*file->dirname)
2481                                 file->dirname = NULL;
2482                 }
2483         }
2484
2485         if (prune_empty_dirs && !am_sender) {
2486                 int j, prev_depth = 0;
2487
2488                 prev_i = 0; /* It's OK that this isn't really true. */
2489
2490                 for (i = flist->low; i <= flist->high; i++) {
2491                         struct file_struct *fp, *file = flist->sorted[i];
2492
2493                         /* This temporarily abuses the F_DEPTH() value for a
2494                          * directory that is in a chain that might get pruned.
2495                          * We restore the old value if it gets a reprieve. */
2496                         if (S_ISDIR(file->mode) && F_DEPTH(file)) {
2497                                 /* Dump empty dirs when coming back down. */
2498                                 for (j = prev_depth; j >= F_DEPTH(file); j--) {
2499                                         fp = flist->sorted[prev_i];
2500                                         if (F_DEPTH(fp) >= 0)
2501                                                 break;
2502                                         prev_i = -F_DEPTH(fp)-1;
2503                                         clear_file(fp);
2504                                 }
2505                                 prev_depth = F_DEPTH(file);
2506                                 if (is_excluded(f_name(file, fbuf), 1,
2507                                                        ALL_FILTERS)) {
2508                                         /* Keep dirs through this dir. */
2509                                         for (j = prev_depth-1; ; j--) {
2510                                                 fp = flist->sorted[prev_i];
2511                                                 if (F_DEPTH(fp) >= 0)
2512                                                         break;
2513                                                 prev_i = -F_DEPTH(fp)-1;
2514                                                 F_DEPTH(fp) = j;
2515                                         }
2516                                 } else
2517                                         F_DEPTH(file) = -prev_i-1;
2518                                 prev_i = i;
2519                         } else {
2520                                 /* Keep dirs through this non-dir. */
2521                                 for (j = prev_depth; ; j--) {
2522                                         fp = flist->sorted[prev_i];
2523                                         if (F_DEPTH(fp) >= 0)
2524                                                 break;
2525                                         prev_i = -F_DEPTH(fp)-1;
2526                                         F_DEPTH(fp) = j;
2527                                 }
2528                         }
2529                 }
2530                 /* Dump all remaining empty dirs. */
2531                 while (1) {
2532                         struct file_struct *fp = flist->sorted[prev_i];
2533                         if (F_DEPTH(fp) >= 0)
2534                                 break;
2535                         prev_i = -F_DEPTH(fp)-1;
2536                         clear_file(fp);
2537                 }
2538
2539                 for (i = flist->low; i <= flist->high; i++) {
2540                         if (F_IS_ACTIVE(flist->sorted[i]))
2541                                 break;
2542                 }
2543                 flist->low = i;
2544                 for (i = flist->high; i >= flist->low; i--) {
2545                         if (F_IS_ACTIVE(flist->sorted[i]))
2546                                 break;
2547                 }
2548                 flist->high = i;
2549         }
2550 }
2551
2552 static void output_flist(struct file_list *flist)
2553 {
2554         char uidbuf[16], gidbuf[16], depthbuf[16];
2555         struct file_struct *file;
2556         const char *root, *dir, *slash, *name, *trail;
2557         const char *who = who_am_i();
2558         int i;
2559
2560         rprintf(FINFO, "[%s] flist start=%d, used=%d, low=%d, high=%d\n",
2561                 who, flist->ndx_start, flist->used, flist->low, flist->high);
2562         for (i = 0; i < flist->used; i++) {
2563                 file = flist->files[i];
2564                 if ((am_root || am_sender) && uid_ndx) {
2565                         snprintf(uidbuf, sizeof uidbuf, " uid=%u",
2566                                  F_OWNER(file));
2567                 } else
2568                         *uidbuf = '\0';
2569                 if (gid_ndx) {
2570                         static char parens[] = "(\0)\0\0\0";
2571                         char *pp = parens + (file->flags & FLAG_SKIP_GROUP ? 0 : 3);
2572                         snprintf(gidbuf, sizeof gidbuf, " gid=%s%u%s",
2573                                  pp, F_GROUP(file), pp + 2);
2574                 } else
2575                         *gidbuf = '\0';
2576                 if (!am_sender)
2577                         snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file));
2578                 if (F_IS_ACTIVE(file)) {
2579                         root = am_sender ? NS(F_PATHNAME(file)) : depthbuf;
2580                         if ((dir = file->dirname) == NULL)
2581                                 dir = slash = "";
2582                         else
2583                                 slash = "/";
2584                         name = file->basename;
2585                         trail = S_ISDIR(file->mode) ? "/" : "";
2586                 } else
2587                         root = dir = slash = name = trail = "";
2588                 rprintf(FINFO,
2589                         "[%s] i=%d %s %s%s%s%s mode=0%o len=%.0f%s%s flags=%x\n",
2590                         who, i + flist->ndx_start,
2591                         root, dir, slash, name, trail,
2592                         (int)file->mode, (double)F_LENGTH(file),
2593                         uidbuf, gidbuf, file->flags);
2594         }
2595 }
2596
2597 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
2598 enum fnc_type { t_PATH, t_ITEM };
2599
2600 static int found_prefix;
2601
2602 /* Compare the names of two file_struct entities, similar to how strcmp()
2603  * would do if it were operating on the joined strings.
2604  *
2605  * Some differences beginning with protocol_version 29: (1) directory names
2606  * are compared with an assumed trailing slash so that they compare in a
2607  * way that would cause them to sort immediately prior to any content they
2608  * may have; (2) a directory of any name compares after a non-directory of
2609  * any name at the same depth; (3) a directory with name "." compares prior
2610  * to anything else.  These changes mean that a directory and a non-dir
2611  * with the same name will not compare as equal (protocol_version >= 29).
2612  *
2613  * The dirname component can be an empty string, but the basename component
2614  * cannot (and never is in the current codebase).  The basename component
2615  * may be NULL (for a removed item), in which case it is considered to be
2616  * after any existing item. */
2617 int f_name_cmp(const struct file_struct *f1, const struct file_struct *f2)
2618 {
2619         int dif;
2620         const uchar *c1, *c2;
2621         enum fnc_state state1, state2;
2622         enum fnc_type type1, type2;
2623         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
2624
2625         if (!f1 || !F_IS_ACTIVE(f1)) {
2626                 if (!f2 || !F_IS_ACTIVE(f2))
2627                         return 0;
2628                 return -1;
2629         }
2630         if (!f2 || !F_IS_ACTIVE(f2))
2631                 return 1;
2632
2633         c1 = (uchar*)f1->dirname;
2634         c2 = (uchar*)f2->dirname;
2635         if (c1 == c2)
2636                 c1 = c2 = NULL;
2637         if (!c1) {
2638                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2639                 c1 = (const uchar*)f1->basename;
2640                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2641                         type1 = t_ITEM;
2642                         state1 = s_TRAILING;
2643                         c1 = (uchar*)"";
2644                 } else
2645                         state1 = s_BASE;
2646         } else {
2647                 type1 = t_path;
2648                 state1 = s_DIR;
2649         }
2650         if (!c2) {
2651                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2652                 c2 = (const uchar*)f2->basename;
2653                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2654                         type2 = t_ITEM;
2655                         state2 = s_TRAILING;
2656                         c2 = (uchar*)"";
2657                 } else
2658                         state2 = s_BASE;
2659         } else {
2660                 type2 = t_path;
2661                 state2 = s_DIR;
2662         }
2663
2664         if (type1 != type2)
2665                 return type1 == t_PATH ? 1 : -1;
2666
2667         do {
2668                 if (!*c1) {
2669                         switch (state1) {
2670                         case s_DIR:
2671                                 state1 = s_SLASH;
2672                                 c1 = (uchar*)"/";
2673                                 break;
2674                         case s_SLASH:
2675                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2676                                 c1 = (const uchar*)f1->basename;
2677                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2678                                         type1 = t_ITEM;
2679                                         state1 = s_TRAILING;
2680                                         c1 = (uchar*)"";
2681                                 } else
2682                                         state1 = s_BASE;
2683                                 break;
2684                         case s_BASE:
2685                                 state1 = s_TRAILING;
2686                                 if (type1 == t_PATH) {
2687                                         c1 = (uchar*)"/";
2688                                         break;
2689                                 }
2690                                 /* FALL THROUGH */
2691                         case s_TRAILING:
2692                                 type1 = t_ITEM;
2693                                 break;
2694                         }
2695                         if (*c2 && type1 != type2)
2696                                 return type1 == t_PATH ? 1 : -1;
2697                 }
2698                 if (!*c2) {
2699                         switch (state2) {
2700                         case s_DIR:
2701                                 state2 = s_SLASH;
2702                                 c2 = (uchar*)"/";
2703                                 break;
2704                         case s_SLASH:
2705                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2706                                 c2 = (const uchar*)f2->basename;
2707                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2708                                         type2 = t_ITEM;
2709                                         state2 = s_TRAILING;
2710                                         c2 = (uchar*)"";
2711                                 } else
2712                                         state2 = s_BASE;
2713                                 break;
2714                         case s_BASE:
2715                                 state2 = s_TRAILING;
2716                                 if (type2 == t_PATH) {
2717                                         c2 = (uchar*)"/";
2718                                         break;
2719                                 }
2720                                 /* FALL THROUGH */
2721                         case s_TRAILING:
2722                                 found_prefix = 1;
2723                                 if (!*c1)
2724                                         return 0;
2725                                 type2 = t_ITEM;
2726                                 break;
2727                         }
2728                         if (type1 != type2)
2729                                 return type1 == t_PATH ? 1 : -1;
2730                 }
2731         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
2732
2733         return dif;
2734 }
2735
2736 /* Returns 1 if f1's filename has all of f2's filename as a prefix.  This does
2737  * not match if f2's basename is not an exact match of a path element in f1.
2738  * E.g. /path/foo is not a prefix of /path/foobar/baz, but /path/foobar is. */
2739 int f_name_has_prefix(const struct file_struct *f1, const struct file_struct *f2)
2740 {
2741         found_prefix = 0;
2742         f_name_cmp(f1, f2);
2743         return found_prefix;
2744 }
2745
2746 char *f_name_buf(void)
2747 {
2748         static char names[5][MAXPATHLEN];
2749         static unsigned int n;
2750
2751         n = (n + 1) % (sizeof names / sizeof names[0]);
2752
2753         return names[n];
2754 }
2755
2756 /* Return a copy of the full filename of a flist entry, using the indicated
2757  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
2758  * done because we checked the size when creating the file_struct entry.
2759  */
2760 char *f_name(const struct file_struct *f, char *fbuf)
2761 {
2762         if (!f || !F_IS_ACTIVE(f))
2763                 return NULL;
2764
2765         if (!fbuf)
2766                 fbuf = f_name_buf();
2767
2768         if (f->dirname) {
2769                 int len = strlen(f->dirname);
2770                 memcpy(fbuf, f->dirname, len);
2771                 fbuf[len] = '/';
2772                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
2773         } else
2774                 strlcpy(fbuf, f->basename, MAXPATHLEN);
2775
2776         return fbuf;
2777 }
2778
2779 /* Do a non-recursive scan of the named directory, possibly ignoring all
2780  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
2781  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
2782  * buffer (the functions we call will append names onto the end, but the old
2783  * dir value will be restored on exit). */
2784 struct file_list *get_dirlist(char *dirname, int dlen, int ignore_filter_rules)
2785 {
2786         struct file_list *dirlist;
2787         char dirbuf[MAXPATHLEN];
2788         int save_recurse = recurse;
2789         int save_xfer_dirs = xfer_dirs;
2790         int save_prune_empty_dirs = prune_empty_dirs;
2791
2792         if (dlen < 0) {
2793                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
2794                 if (dlen >= MAXPATHLEN)
2795                         return NULL;
2796                 dirname = dirbuf;
2797         }
2798
2799         dirlist = flist_new(FLIST_TEMP, "get_dirlist");
2800
2801         recurse = 0;
2802         xfer_dirs = 1;
2803         send_directory(ignore_filter_rules ? -2 : -1, dirlist, dirname, dlen, 0);
2804         xfer_dirs = save_xfer_dirs;
2805         recurse = save_recurse;
2806         if (do_progress)
2807                 flist_count_offset += dirlist->used;
2808
2809         prune_empty_dirs = 0;
2810         dirlist->sorted = dirlist->files;
2811         flist_sort_and_clean(dirlist, 0);
2812         prune_empty_dirs = save_prune_empty_dirs;
2813
2814         if (verbose > 3)
2815                 output_flist(dirlist);
2816
2817         return dirlist;
2818 }