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) 2002-2007 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_acls;
  48 extern int preserve_xattrs;
  49 extern int preserve_links;
  50 extern int preserve_hard_links;
  51 extern int preserve_devices;
  52 extern int preserve_specials;
  53 extern int uid_ndx;
  54 extern int gid_ndx;
  55 extern int eol_nulls;
  56 extern int relative_paths;
  57 extern int implied_dirs;
  58 extern int file_extra_cnt;
  59 extern int ignore_perishable;
  60 extern int non_perishable_cnt;
  61 extern int prune_empty_dirs;
  62 extern int copy_links;
  63 extern int copy_unsafe_links;
  64 extern int protocol_version;
  65 extern int sanitize_paths;
  66 extern int munge_symlinks;
  67 extern int need_unsorted_flist;
  68 extern int unsort_ndx;
  69 extern struct stats stats;
  70 extern char *filesfrom_host;
  71
  72 extern char curr_dir[MAXPATHLEN];
  73
  74 extern struct chmod_mode_struct *chmod_modes;
  75
  76 extern struct filter_list_struct filter_list;
  77 extern struct filter_list_struct server_filter_list;
  78
  79 #ifdef ICONV_OPTION
  80 extern int filesfrom_convert;
  81 extern iconv_t ic_send, ic_recv;
  82 #endif
  83
  84 #define PTR_SIZE (sizeof (struct file_struct *))
  85
  86 int io_error;
  87 int checksum_len;
  88 dev_t filesystem_dev; /* used to implement -x */
  89
  90 struct file_list *cur_flist, *first_flist, *dir_flist;
  91 int send_dir_ndx = -1, send_dir_depth = -1;
  92 int flist_cnt = 0; /* how many (non-tmp) file list objects exist */
  93 int file_total = 0; /* total of all active items over all file-lists */
  94 int flist_eof = 0; /* all the file-lists are now known */
  95
  96 #define NORMAL_NAME 0
  97 #define SLASH_ENDING_NAME 1
  98 #define DOT_NAME 2
  99
 100 /* Starting from protocol version 26, we always use 64-bit ino_t and dev_t
 101  * internally, even if this platform does not allow files to have 64-bit inums.
 102  * The only exception is if we're on a platform with no 64-bit type at all.
 103  *
 104  * Because we use read_longint() to get these off the wire, if you transfer
 105  * devices or (for protocols < 30) hardlinks with dev or inum > 2**32 to a
 106  * machine with no 64-bit types then you will get an overflow error.
 107  *
 108  * Note that if you transfer devices from a 64-bit-devt machine (say, Solaris)
 109  * to a 32-bit-devt machine (say, Linux-2.2/x86) then the device numbers will
 110  * be truncated.  But it's a kind of silly thing to do anyhow. */
 111
 112 /* The tmp_* vars are used as a cache area by make_file() to store data
 113  * that the sender doesn't need to remember in its file list.  The data
 114  * will survive just long enough to be used by send_file_entry(). */
 115 static dev_t tmp_rdev;
 116 #ifdef SUPPORT_HARD_LINKS
 117 static int64 tmp_dev, tmp_ino;
 118 #endif
 119 static char tmp_sum[MAX_DIGEST_LEN];
 120
 121 static char empty_sum[MAX_DIGEST_LEN];
 122 static int flist_count_offset; /* for --delete --progress */
 123 static int dir_count = 0;
 124
 125 static void flist_sort_and_clean(struct file_list *flist, int strip_root);
 126 static void output_flist(struct file_list *flist);
 127
 128 void init_flist(void)
 129 {
 130         if (verbose > 4) {
 131                 rprintf(FINFO, "FILE_STRUCT_LEN=%d, EXTRA_LEN=%d\n",
 132                         (int)FILE_STRUCT_LEN, (int)EXTRA_LEN);
 133         }
 134         checksum_len = protocol_version < 21 ? 2
 135                      : protocol_version < 30 ? MD4_DIGEST_LEN
 136                      : MD5_DIGEST_LEN;
 137 }
 138
 139 static int show_filelist_p(void)
 140 {
 141         return verbose && xfer_dirs && !am_server && !inc_recurse;
 142 }
 143
 144 static void start_filelist_progress(char *kind)
 145 {
 146         rprintf(FCLIENT, "%s ... ", kind);
 147         if (verbose > 1 || do_progress)
 148                 rprintf(FCLIENT, "\n");
 149         rflush(FINFO);
 150 }
 151
 152 static void emit_filelist_progress(int count)
 153 {
 154         rprintf(FCLIENT, " %d files...\r", count);
 155 }
 156
 157 static void maybe_emit_filelist_progress(int count)
 158 {
 159         if (do_progress && show_filelist_p() && (count % 100) == 0)
 160                 emit_filelist_progress(count);
 161 }
 162
 163 static void finish_filelist_progress(const struct file_list *flist)
 164 {
 165         if (do_progress) {
 166                 /* This overwrites the progress line */
 167                 rprintf(FINFO, "%d file%sto consider\n",
 168                         flist->used, flist->used == 1 ? " " : "s ");
 169         } else
 170                 rprintf(FINFO, "done\n");
 171 }
 172
 173 void show_flist_stats(void)
 174 {
 175         /* Nothing yet */
 176 }
 177
 178 /* Stat either a symlink or its referent, depending on the settings of
 179  * copy_links, copy_unsafe_links, etc.  Returns -1 on error, 0 on success.
 180  *
 181  * If path is the name of a symlink, then the linkbuf buffer (which must hold
 182  * MAXPATHLEN chars) will be set to the symlink's target string.
 183  *
 184  * The stat structure pointed to by stp will contain information about the
 185  * link or the referent as appropriate, if they exist. */
 186 static int readlink_stat(const char *path, STRUCT_STAT *stp, char *linkbuf)
 187 {
 188 #ifdef SUPPORT_LINKS
 189         if (link_stat(path, stp, copy_dirlinks) < 0)
 190                 return -1;
 191         if (S_ISLNK(stp->st_mode)) {
 192                 int llen = readlink(path, linkbuf, MAXPATHLEN - 1);
 193                 if (llen < 0)
 194                         return -1;
 195                 linkbuf[llen] = '\0';
 196                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 197                         if (verbose > 1) {
 198                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 199                                         path, linkbuf);
 200                         }
 201                         return x_stat(path, stp, NULL);
 202                 }
 203                 if (munge_symlinks && am_sender && llen > SYMLINK_PREFIX_LEN
 204                  && strncmp(linkbuf, SYMLINK_PREFIX, SYMLINK_PREFIX_LEN) == 0) {
 205                         memmove(linkbuf, linkbuf + SYMLINK_PREFIX_LEN,
 206                                 llen - SYMLINK_PREFIX_LEN + 1);
 207                 }
 208         }
 209         return 0;
 210 #else
 211         return x_stat(path, stp, NULL);
 212 #endif
 213 }
 214
 215 int link_stat(const char *path, STRUCT_STAT *stp, int follow_dirlinks)
 216 {
 217 #ifdef SUPPORT_LINKS
 218         if (copy_links)
 219                 return x_stat(path, stp, NULL);
 220         if (x_lstat(path, stp, NULL) < 0)
 221                 return -1;
 222         if (follow_dirlinks && S_ISLNK(stp->st_mode)) {
 223                 STRUCT_STAT st;
 224                 if (x_stat(path, &st, NULL) == 0 && S_ISDIR(st.st_mode))
 225                         *stp = st;
 226         }
 227         return 0;
 228 #else
 229         return x_stat(path, stp, NULL);
 230 #endif
 231 }
 232
 233 /* This function is used to check if a file should be included/excluded
 234  * from the list of files based on its name and type etc.  The value of
 235  * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
 236 static int is_excluded(char *fname, int is_dir, int filter_level)
 237 {
 238 #if 0 /* This currently never happens, so avoid a useless compare. */
 239         if (filter_level == NO_FILTERS)
 240                 return 0;
 241 #endif
 242         if (fname) {
 243                 /* never exclude '.', even if somebody does --exclude '*' */
 244                 if (fname[0] == '.' && !fname[1])
 245                         return 0;
 246                 /* Handle the -R version of the '.' dir. */
 247                 if (fname[0] == '/') {
 248                         int len = strlen(fname);
 249                         if (fname[len-1] == '.' && fname[len-2] == '/')
 250                                 return 0;
 251                 }
 252         }
 253         if (server_filter_list.head
 254             && check_filter(&server_filter_list, fname, is_dir) < 0)
 255                 return 1;
 256         if (filter_level != ALL_FILTERS)
 257                 return 0;
 258         if (filter_list.head
 259             && check_filter(&filter_list, fname, is_dir) < 0)
 260                 return 1;
 261         return 0;
 262 }
 263
 264 static void send_directory(int f, struct file_list *flist,
 265                            char *fbuf, int len, int flags);
 266
 267 static const char *pathname, *orig_dir;
 268 static int pathname_len;
 269
 270
 271 /* Make sure flist can hold at least flist->used + extra entries. */
 272 static void flist_expand(struct file_list *flist, int extra)
 273 {
 274         struct file_struct **new_ptr;
 275
 276         if (flist->used + extra <= flist->malloced)
 277                 return;
 278
 279         if (flist->malloced < FLIST_START)
 280                 flist->malloced = FLIST_START;
 281         else if (flist->malloced >= FLIST_LINEAR)
 282                 flist->malloced += FLIST_LINEAR;
 283         else
 284                 flist->malloced *= 2;
 285
 286         /* In case count jumped or we are starting the list
 287          * with a known size just set it. */
 288         if (flist->malloced < flist->used + extra)
 289                 flist->malloced = flist->used + extra;
 290
 291         new_ptr = realloc_array(flist->files, struct file_struct *,
 292                                 flist->malloced);
 293
 294         if (verbose >= 2 && flist->malloced != FLIST_START) {
 295                 rprintf(FCLIENT, "[%s] expand file_list pointer array to %.0f bytes, did%s move\n",
 296                     who_am_i(),
 297                     (double)sizeof flist->files[0] * flist->malloced,
 298                     (new_ptr == flist->files) ? " not" : "");
 299         }
 300
 301         flist->files = new_ptr;
 302
 303         if (!flist->files)
 304                 out_of_memory("flist_expand");
 305 }
 306
 307 static void flist_done_allocating(struct file_list *flist)
 308 {
 309         void *ptr = pool_boundary(flist->file_pool, 8*1024);
 310         if (flist->pool_boundary == ptr)
 311                 flist->pool_boundary = NULL; /* list didn't use any pool memory */
 312         else
 313                 flist->pool_boundary = ptr;
 314 }
 315
 316 int push_pathname(const char *dir, int len)
 317 {
 318         if (dir == pathname)
 319                 return 1;
 320
 321         if (!orig_dir)
 322                 orig_dir = strdup(curr_dir);
 323
 324         if (pathname && !pop_dir(orig_dir)) {
 325                 rsyserr(FERROR, errno, "pop_dir %s failed",
 326                         full_fname(orig_dir));
 327                 exit_cleanup(RERR_FILESELECT);
 328         }
 329
 330         if (dir && !push_dir(dir, 0)) {
 331                 io_error |= IOERR_GENERAL;
 332                 rsyserr(FERROR, errno, "push_dir %s failed in %s",
 333                         full_fname(dir), curr_dir);
 334                 return 0;
 335         }
 336
 337         pathname = dir;
 338         pathname_len = len >= 0 ? len : dir ? (int)strlen(dir) : 0;
 339
 340         return 1;
 341 }
 342
 343 static void send_file_entry(int f, struct file_struct *file, int ndx, int first_ndx)
 344 {
 345         static time_t modtime;
 346         static mode_t mode;
 347 #ifdef SUPPORT_HARD_LINKS
 348         static int64 dev;
 349 #endif
 350         static dev_t rdev;
 351         static uint32 rdev_major;
 352         static uid_t uid;
 353         static gid_t gid;
 354         static char *user_name, *group_name;
 355         static char lastname[MAXPATHLEN];
 356         char fname[MAXPATHLEN];
 357         int first_hlink_ndx = -1;
 358         int l1, l2;
 359         int xflags;
 360
 361 #ifdef ICONV_OPTION
 362         if (ic_send != (iconv_t)-1) {
 363                 xbuf outbuf, inbuf;
 364
 365                 INIT_CONST_XBUF(outbuf, fname);
 366
 367                 if (file->dirname) {
 368                         INIT_XBUF_STRLEN(inbuf, (char*)file->dirname);
 369                         outbuf.size -= 2; /* Reserve room for '/' & 1 more char. */
 370                         if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0)
 371                                 goto convert_error;
 372                         outbuf.size += 2;
 373                         outbuf.buf[outbuf.len++] = '/';
 374                 }
 375
 376                 INIT_XBUF_STRLEN(inbuf, (char*)file->basename);
 377                 if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0) {
 378                   convert_error:
 379                         io_error |= IOERR_GENERAL;
 380                         rprintf(FINFO,
 381                             "[%s] cannot convert filename: %s (%s)\n",
 382                             who_am_i(), f_name(file, fname), strerror(errno));
 383                         return;
 384                 }
 385                 outbuf.buf[outbuf.len] = '\0';
 386         } else
 387 #endif
 388                 f_name(file, fname);
 389
 390         /* Initialize starting value of xflags. */
 391         if (protocol_version >= 30 && S_ISDIR(file->mode)) {
 392                 if (file->flags & FLAG_CONTENT_DIR)
 393                         xflags = file->flags & FLAG_TOP_DIR;
 394                 else if (file->flags & FLAG_IMPLIED_DIR)
 395                         xflags = XMIT_TOP_DIR | XMIT_NO_CONTENT_DIR;
 396                 else
 397                         xflags = XMIT_NO_CONTENT_DIR;
 398         } else
 399                 xflags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */
 400
 401         if (file->mode == mode)
 402                 xflags |= XMIT_SAME_MODE;
 403         else
 404                 mode = file->mode;
 405
 406         if ((preserve_devices && IS_DEVICE(mode))
 407          || (preserve_specials && IS_SPECIAL(mode))) {
 408                 if (protocol_version < 28) {
 409                         if (tmp_rdev == rdev)
 410                                 xflags |= XMIT_SAME_RDEV_pre28;
 411                         else
 412                                 rdev = tmp_rdev;
 413                 } else {
 414                         rdev = tmp_rdev;
 415                         if ((uint32)major(rdev) == rdev_major)
 416                                 xflags |= XMIT_SAME_RDEV_MAJOR;
 417                         else
 418                                 rdev_major = major(rdev);
 419                         if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu)
 420                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
 421                 }
 422         } else if (protocol_version < 28)
 423                 rdev = MAKEDEV(0, 0);
 424         if (uid_ndx) {
 425                 if ((uid_t)F_OWNER(file) == uid && *lastname)
 426                         xflags |= XMIT_SAME_UID;
 427                 else {
 428                         uid = F_OWNER(file);
 429                         if (uid_ndx && !numeric_ids) {
 430                                 user_name = add_uid(uid);
 431                                 if (inc_recurse && user_name)
 432                                         xflags |= XMIT_USER_NAME_FOLLOWS;
 433                         }
 434                 }
 435         }
 436         if (gid_ndx) {
 437                 if ((gid_t)F_GROUP(file) == gid && *lastname)
 438                         xflags |= XMIT_SAME_GID;
 439                 else {
 440                         gid = F_GROUP(file);
 441                         if (gid_ndx && !numeric_ids) {
 442                                 group_name = add_gid(gid);
 443                                 if (inc_recurse && group_name)
 444                                         xflags |= XMIT_GROUP_NAME_FOLLOWS;
 445                         }
 446                 }
 447         }
 448         if (file->modtime == modtime)
 449                 xflags |= XMIT_SAME_TIME;
 450         else
 451                 modtime = file->modtime;
 452
 453 #ifdef SUPPORT_HARD_LINKS
 454         if (tmp_dev != 0) {
 455                 if (protocol_version >= 30) {
 456                         struct ht_int64_node *np = idev_find(tmp_dev, tmp_ino);
 457                         first_hlink_ndx = (int32)(long)np->data - 1;
 458                         if (first_hlink_ndx < 0) {
 459                                 np->data = (void*)(long)(first_ndx + ndx + 1);
 460                                 xflags |= XMIT_HLINK_FIRST;
 461                         }
 462                         xflags |= XMIT_HLINKED;
 463                 } else {
 464                         if (tmp_dev == dev) {
 465                                 if (protocol_version >= 28)
 466                                         xflags |= XMIT_SAME_DEV_pre30;
 467                         } else
 468                                 dev = tmp_dev;
 469                         xflags |= XMIT_HLINKED;
 470                 }
 471         }
 472 #endif
 473
 474         for (l1 = 0;
 475             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 476             l1++) {}
 477         l2 = strlen(fname+l1);
 478
 479         if (l1 > 0)
 480                 xflags |= XMIT_SAME_NAME;
 481         if (l2 > 255)
 482                 xflags |= XMIT_LONG_NAME;
 483
 484         /* We must make sure we don't send a zero flag byte or the
 485          * other end will terminate the flist transfer.  Note that
 486          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 487          * it's harmless way to add a bit to the first flag byte. */
 488         if (protocol_version >= 28) {
 489                 if (!xflags && !S_ISDIR(mode))
 490                         xflags |= XMIT_TOP_DIR;
 491                 if ((xflags & 0xFF00) || !xflags) {
 492                         xflags |= XMIT_EXTENDED_FLAGS;
 493                         write_shortint(f, xflags);
 494                 } else
 495                         write_byte(f, xflags);
 496         } else {
 497                 if (!(xflags & 0xFF))
 498                         xflags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
 499                 write_byte(f, xflags);
 500         }
 501         if (xflags & XMIT_SAME_NAME)
 502                 write_byte(f, l1);
 503         if (xflags & XMIT_LONG_NAME)
 504                 write_varint30(f, l2);
 505         else
 506                 write_byte(f, l2);
 507         write_buf(f, fname + l1, l2);
 508
 509         if (first_hlink_ndx >= 0) {
 510                 write_varint(f, first_hlink_ndx);
 511                 if (first_hlink_ndx >= first_ndx)
 512                         goto the_end;
 513         }
 514
 515         write_varlong30(f, F_LENGTH(file), 3);
 516         if (!(xflags & XMIT_SAME_TIME)) {
 517                 if (protocol_version >= 30)
 518                         write_varlong(f, modtime, 4);
 519                 else
 520                         write_int(f, modtime);
 521         }
 522         if (!(xflags & XMIT_SAME_MODE))
 523                 write_int(f, to_wire_mode(mode));
 524         if (uid_ndx && !(xflags & XMIT_SAME_UID)) {
 525                 if (protocol_version < 30)
 526                         write_int(f, uid);
 527                 else {
 528                         write_varint(f, uid);
 529                         if (xflags & XMIT_USER_NAME_FOLLOWS) {
 530                                 int len = strlen(user_name);
 531                                 write_byte(f, len);
 532                                 write_buf(f, user_name, len);
 533                         }
 534                 }
 535         }
 536         if (gid_ndx && !(xflags & XMIT_SAME_GID)) {
 537                 if (protocol_version < 30)
 538                         write_int(f, gid);
 539                 else {
 540                         write_varint(f, gid);
 541                         if (xflags & XMIT_GROUP_NAME_FOLLOWS) {
 542                                 int len = strlen(group_name);
 543                                 write_byte(f, len);
 544                                 write_buf(f, group_name, len);
 545                         }
 546                 }
 547         }
 548         if ((preserve_devices && IS_DEVICE(mode))
 549          || (preserve_specials && IS_SPECIAL(mode))) {
 550                 if (protocol_version < 28) {
 551                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 552                                 write_int(f, (int)rdev);
 553                 } else {
 554                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 555                                 write_varint30(f, major(rdev));
 556                         if (protocol_version >= 30)
 557                                 write_varint(f, minor(rdev));
 558                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 559                                 write_byte(f, minor(rdev));
 560                         else
 561                                 write_int(f, minor(rdev));
 562                 }
 563         }
 564
 565 #ifdef SUPPORT_LINKS
 566         if (preserve_links && S_ISLNK(mode)) {
 567                 const char *sl = F_SYMLINK(file);
 568                 int len = strlen(sl);
 569                 write_varint30(f, len);
 570                 write_buf(f, sl, len);
 571         }
 572 #endif
 573
 574 #ifdef SUPPORT_HARD_LINKS
 575         if (tmp_dev != 0 && protocol_version < 30) {
 576                 if (protocol_version < 26) {
 577                         /* 32-bit dev_t and ino_t */
 578                         write_int(f, (int32)dev);
 579                         write_int(f, (int32)tmp_ino);
 580                 } else {
 581                         /* 64-bit dev_t and ino_t */
 582                         if (!(xflags & XMIT_SAME_DEV_pre30))
 583                                 write_longint(f, dev);
 584                         write_longint(f, tmp_ino);
 585                 }
 586         }
 587 #endif
 588
 589         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 590                 const char *sum;
 591                 if (S_ISREG(mode))
 592                         sum = tmp_sum;
 593                 else {
 594                         /* Prior to 28, we sent a useless set of nulls. */
 595                         sum = empty_sum;
 596                 }
 597                 write_buf(f, sum, checksum_len);
 598         }
 599
 600   the_end:
 601         strlcpy(lastname, fname, MAXPATHLEN);
 602
 603         if (S_ISREG(mode) || S_ISLNK(mode))
 604                 stats.total_size += F_LENGTH(file);
 605 }
 606
 607 static struct file_struct *recv_file_entry(struct file_list *flist,
 608                                            int xflags, int f)
 609 {
 610         static int64 modtime;
 611         static mode_t mode;
 612 #ifdef SUPPORT_HARD_LINKS
 613         static int64 dev;
 614 #endif
 615         static dev_t rdev;
 616         static uint32 rdev_major;
 617         static uid_t uid;
 618         static gid_t gid;
 619         static uint16 gid_flags;
 620         static char lastname[MAXPATHLEN], *lastdir;
 621         static int lastdir_depth, lastdir_len = -1;
 622         static unsigned int del_hier_name_len = 0;
 623         static int in_del_hier = 0;
 624         char thisname[MAXPATHLEN];
 625         unsigned int l1 = 0, l2 = 0;
 626         int alloc_len, basename_len, linkname_len;
 627         int extra_len = file_extra_cnt * EXTRA_LEN;
 628         int first_hlink_ndx = -1;
 629         OFF_T file_length;
 630         const char *basename;
 631         struct file_struct *file;
 632         alloc_pool_t *pool;
 633         char *bp;
 634
 635         if (xflags & XMIT_SAME_NAME)
 636                 l1 = read_byte(f);
 637
 638         if (xflags & XMIT_LONG_NAME)
 639                 l2 = read_varint30(f);
 640         else
 641                 l2 = read_byte(f);
 642
 643         if (l2 >= MAXPATHLEN - l1) {
 644                 rprintf(FERROR,
 645                         "overflow: xflags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
 646                         xflags, l1, l2, lastname, who_am_i());
 647                 overflow_exit("recv_file_entry");
 648         }
 649
 650         strlcpy(thisname, lastname, l1 + 1);
 651         read_sbuf(f, &thisname[l1], l2);
 652         thisname[l1 + l2] = 0;
 653
 654         /* Abuse basename_len for a moment... */
 655         basename_len = strlcpy(lastname, thisname, MAXPATHLEN);
 656
 657 #ifdef ICONV_OPTION
 658         if (ic_recv != (iconv_t)-1) {
 659                 xbuf outbuf, inbuf;
 660
 661                 INIT_CONST_XBUF(outbuf, thisname);
 662                 INIT_XBUF(inbuf, lastname, basename_len, -1);
 663
 664                 if (iconvbufs(ic_recv, &inbuf, &outbuf, 0) < 0) {
 665                         io_error |= IOERR_GENERAL;
 666                         rprintf(FINFO,
 667                             "[%s] cannot convert filename: %s (%s)\n",
 668                             who_am_i(), lastname, strerror(errno));
 669                         outbuf.len = 0;
 670                 }
 671                 outbuf.buf[outbuf.len] = '\0';
 672         }
 673 #endif
 674
 675         clean_fname(thisname, 0);
 676
 677         if (sanitize_paths)
 678                 sanitize_path(thisname, thisname, "", 0);
 679
 680         if ((basename = strrchr(thisname, '/')) != NULL) {
 681                 int len = basename++ - thisname;
 682                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
 683                         lastdir = new_array(char, len + 1);
 684                         memcpy(lastdir, thisname, len);
 685                         lastdir[len] = '\0';
 686                         lastdir_len = len;
 687                         lastdir_depth = count_dir_elements(lastdir);
 688                 }
 689         } else
 690                 basename = thisname;
 691         basename_len = strlen(basename) + 1; /* count the '\0' */
 692
 693 #ifdef SUPPORT_HARD_LINKS
 694         if (protocol_version >= 30
 695          && BITS_SETnUNSET(xflags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
 696                 first_hlink_ndx = read_varint(f);
 697                 if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->ndx_start + flist->used) {
 698                         rprintf(FERROR,
 699                                 "hard-link reference out of range: %d (%d)\n",
 700                                 first_hlink_ndx, flist->ndx_start + flist->used);
 701                         exit_cleanup(RERR_PROTOCOL);
 702                 }
 703                 if (first_hlink_ndx >= flist->ndx_start) {
 704                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 705                         file_length = F_LENGTH(first);
 706                         modtime = first->modtime;
 707                         mode = first->mode;
 708                         if (uid_ndx)
 709                                 uid = F_OWNER(first);
 710                         if (gid_ndx)
 711                                 gid = F_GROUP(first);
 712                         if ((preserve_devices && IS_DEVICE(mode))
 713                          || (preserve_specials && IS_SPECIAL(mode))) {
 714                                 uint32 *devp = F_RDEV_P(first);
 715                                 rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
 716                                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 717                         }
 718                         if (preserve_links && S_ISLNK(mode))
 719                                 linkname_len = strlen(F_SYMLINK(first)) + 1;
 720                         else
 721                                 linkname_len = 0;
 722                         goto create_object;
 723                 }
 724         }
 725 #endif
 726
 727         file_length = read_varlong30(f, 3);
 728         if (!(xflags & XMIT_SAME_TIME)) {
 729                 if (protocol_version >= 30) {
 730                         modtime = read_varlong(f, 4);
 731 #if SIZEOF_TIME_T < SIZEOF_INT64
 732                         if (!am_generator && (int64)(time_t)modtime != modtime) {
 733                                 rprintf(FERROR_XFER,
 734                                     "Time value of %s truncated on receiver.\n",
 735                                     lastname);
 736                         }
 737 #endif
 738                 } else
 739                         modtime = read_int(f);
 740         }
 741         if (!(xflags & XMIT_SAME_MODE))
 742                 mode = from_wire_mode(read_int(f));
 743
 744         if (chmod_modes && !S_ISLNK(mode))
 745                 mode = tweak_mode(mode, chmod_modes);
 746
 747         if (uid_ndx && !(xflags & XMIT_SAME_UID)) {
 748                 if (protocol_version < 30)
 749                         uid = (uid_t)read_int(f);
 750                 else {
 751                         uid = (uid_t)read_varint(f);
 752                         if (xflags & XMIT_USER_NAME_FOLLOWS)
 753                                 uid = recv_user_name(f, uid);
 754                         else if (inc_recurse && am_root && !numeric_ids)
 755                                 uid = match_uid(uid);
 756                 }
 757         }
 758         if (gid_ndx && !(xflags & XMIT_SAME_GID)) {
 759                 if (protocol_version < 30)
 760                         gid = (gid_t)read_int(f);
 761                 else {
 762                         gid = (gid_t)read_varint(f);
 763                         gid_flags = 0;
 764                         if (xflags & XMIT_GROUP_NAME_FOLLOWS)
 765                                 gid = recv_group_name(f, gid, &gid_flags);
 766                         else if (inc_recurse && (!am_root || !numeric_ids))
 767                                 gid = match_gid(gid, &gid_flags);
 768                 }
 769         }
 770
 771         if ((preserve_devices && IS_DEVICE(mode))
 772          || (preserve_specials && IS_SPECIAL(mode))) {
 773                 if (protocol_version < 28) {
 774                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 775                                 rdev = (dev_t)read_int(f);
 776                 } else {
 777                         uint32 rdev_minor;
 778                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 779                                 rdev_major = read_varint30(f);
 780                         if (protocol_version >= 30)
 781                                 rdev_minor = read_varint(f);
 782                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 783                                 rdev_minor = read_byte(f);
 784                         else
 785                                 rdev_minor = read_int(f);
 786                         rdev = MAKEDEV(rdev_major, rdev_minor);
 787                 }
 788                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 789                 file_length = 0;
 790         } else if (protocol_version < 28)
 791                 rdev = MAKEDEV(0, 0);
 792
 793 #ifdef SUPPORT_LINKS
 794         if (preserve_links && S_ISLNK(mode)) {
 795                 linkname_len = read_varint30(f) + 1; /* count the '\0' */
 796                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 797                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 798                                 linkname_len - 1);
 799                         overflow_exit("recv_file_entry");
 800                 }
 801                 if (munge_symlinks)
 802                         linkname_len += SYMLINK_PREFIX_LEN;
 803         }
 804         else
 805 #endif
 806                 linkname_len = 0;
 807
 808 #ifdef SUPPORT_HARD_LINKS
 809   create_object:
 810         if (preserve_hard_links) {
 811                 if (protocol_version < 28 && S_ISREG(mode))
 812                         xflags |= XMIT_HLINKED;
 813                 if (xflags & XMIT_HLINKED)
 814                         extra_len += (inc_recurse+1) * EXTRA_LEN;
 815         }
 816 #endif
 817
 818 #ifdef SUPPORT_ACLS
 819         /* We need one or two index int32s when we're preserving ACLs. */
 820         if (preserve_acls)
 821                 extra_len += (S_ISDIR(mode) ? 2 : 1) * EXTRA_LEN;
 822 #endif
 823
 824         if (always_checksum && S_ISREG(mode))
 825                 extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
 826
 827         if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
 828                 extra_len += EXTRA_LEN;
 829
 830         if (inc_recurse && S_ISDIR(mode)) {
 831                 if (one_file_system) {
 832                         /* Room to save the dir's device for -x */
 833                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 834                 }
 835                 pool = dir_flist->file_pool;
 836         } else
 837                 pool = flist->file_pool;
 838
 839 #if EXTRA_ROUNDING > 0
 840         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
 841                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
 842 #endif
 843
 844         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
 845                   + linkname_len;
 846         bp = pool_alloc(pool, alloc_len, "recv_file_entry");
 847
 848         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
 849         bp += extra_len;
 850         file = (struct file_struct *)bp;
 851         bp += FILE_STRUCT_LEN;
 852
 853         memcpy(bp, basename, basename_len);
 854         bp += basename_len + linkname_len; /* skip space for symlink too */
 855
 856 #ifdef SUPPORT_HARD_LINKS
 857         if (xflags & XMIT_HLINKED)
 858                 file->flags |= FLAG_HLINKED;
 859 #endif
 860         file->modtime = (time_t)modtime;
 861         file->len32 = (uint32)file_length;
 862         if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
 863                 file->flags |= FLAG_LENGTH64;
 864                 OPT_EXTRA(file, 0)->unum = (uint32)(file_length >> 32);
 865         }
 866         file->mode = mode;
 867         if (uid_ndx)
 868                 F_OWNER(file) = uid;
 869         if (gid_ndx) {
 870                 F_GROUP(file) = gid;
 871                 file->flags |= gid_flags;
 872         }
 873         if (unsort_ndx)
 874                 F_NDX(file) = flist->used + flist->ndx_start;
 875
 876         if (basename != thisname) {
 877                 file->dirname = lastdir;
 878                 F_DEPTH(file) = lastdir_depth + 1;
 879         } else
 880                 F_DEPTH(file) = 1;
 881
 882         if (S_ISDIR(mode)) {
 883                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
 884                         F_DEPTH(file)--;
 885                 if (protocol_version >= 30) {
 886                         if (!(xflags & XMIT_NO_CONTENT_DIR)) {
 887                                 if (xflags & XMIT_TOP_DIR)
 888                                         file->flags |= FLAG_TOP_DIR;
 889                                 file->flags |= FLAG_CONTENT_DIR;
 890                         } else if (xflags & XMIT_TOP_DIR)
 891                                 file->flags |= FLAG_IMPLIED_DIR;
 892                 } else if (xflags & XMIT_TOP_DIR) {
 893                         in_del_hier = recurse;
 894                         del_hier_name_len = F_DEPTH(file) == 0 ? 0 : l1 + l2;
 895                         if (relative_paths && del_hier_name_len > 2
 896                             && lastname[del_hier_name_len-1] == '.'
 897                             && lastname[del_hier_name_len-2] == '/')
 898                                 del_hier_name_len -= 2;
 899                         file->flags |= FLAG_TOP_DIR | FLAG_CONTENT_DIR;
 900                 } else if (in_del_hier) {
 901                         if (!relative_paths || !del_hier_name_len
 902                          || (l1 >= del_hier_name_len
 903                           && lastname[del_hier_name_len] == '/'))
 904                                 file->flags |= FLAG_CONTENT_DIR;
 905                         else
 906                                 in_del_hier = 0;
 907                 }
 908         }
 909
 910         if ((preserve_devices && IS_DEVICE(mode))
 911          || (preserve_specials && IS_SPECIAL(mode))) {
 912                 uint32 *devp = F_RDEV_P(file);
 913                 DEV_MAJOR(devp) = major(rdev);
 914                 DEV_MINOR(devp) = minor(rdev);
 915         }
 916
 917 #ifdef SUPPORT_LINKS
 918         if (linkname_len) {
 919                 bp = (char*)file->basename + basename_len;
 920                 if (first_hlink_ndx >= flist->ndx_start) {
 921                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 922                         memcpy(bp, F_SYMLINK(first), linkname_len);
 923                 } else if (munge_symlinks) {
 924                         strlcpy(bp, SYMLINK_PREFIX, linkname_len);
 925                         bp += SYMLINK_PREFIX_LEN;
 926                         linkname_len -= SYMLINK_PREFIX_LEN;
 927                         read_sbuf(f, bp, linkname_len - 1);
 928                 } else {
 929                         read_sbuf(f, bp, linkname_len - 1);
 930                         if (sanitize_paths)
 931                                 sanitize_path(bp, bp, "", lastdir_depth);
 932                 }
 933         }
 934 #endif
 935
 936 #ifdef SUPPORT_HARD_LINKS
 937         if (preserve_hard_links && xflags & XMIT_HLINKED) {
 938                 if (protocol_version >= 30) {
 939                         if (xflags & XMIT_HLINK_FIRST) {
 940                                 F_HL_GNUM(file) = flist->ndx_start + flist->used;
 941                         } else
 942                                 F_HL_GNUM(file) = first_hlink_ndx;
 943                 } else {
 944                         static int32 cnt = 0;
 945                         struct ht_int64_node *np;
 946                         int64 ino;
 947                         int32 ndx;
 948                         if (protocol_version < 26) {
 949                                 dev = read_int(f);
 950                                 ino = read_int(f);
 951                         } else {
 952                                 if (!(xflags & XMIT_SAME_DEV_pre30))
 953                                         dev = read_longint(f);
 954                                 ino = read_longint(f);
 955                         }
 956                         np = idev_find(dev, ino);
 957                         ndx = (int32)(long)np->data - 1;
 958                         if (ndx < 0) {
 959                                 ndx = cnt++;
 960                                 np->data = (void*)(long)cnt;
 961                         }
 962                         F_HL_GNUM(file) = ndx;
 963                 }
 964         }
 965 #endif
 966
 967         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 968                 if (S_ISREG(mode))
 969                         bp = F_SUM(file);
 970                 else {
 971                         /* Prior to 28, we get a useless set of nulls. */
 972                         bp = tmp_sum;
 973                 }
 974                 if (first_hlink_ndx >= flist->ndx_start) {
 975                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 976                         memcpy(bp, F_SUM(first), checksum_len);
 977                 } else
 978                         read_buf(f, bp, checksum_len);
 979         }
 980
 981 #ifdef SUPPORT_ACLS
 982         if (preserve_acls && !S_ISLNK(mode))
 983                 receive_acl(file, f);
 984 #endif
 985 #ifdef SUPPORT_XATTRS
 986         if (preserve_xattrs)
 987                 receive_xattr(file, f );
 988 #endif
 989
 990         if (S_ISREG(mode) || S_ISLNK(mode))
 991                 stats.total_size += file_length;
 992
 993         return file;
 994 }
 995
 996 /* Create a file_struct for a named file by reading its stat() information
 997  * and performing extensive checks against global options.
 998  *
 999  * Returns a pointer to the new file struct, or NULL if there was an error
1000  * or this file should be excluded. */
1001 struct file_struct *make_file(const char *fname, struct file_list *flist,
1002                               STRUCT_STAT *stp, int flags, int filter_level)
1003 {
1004         static char *lastdir;
1005         static int lastdir_len = -1;
1006         struct file_struct *file;
1007         char thisname[MAXPATHLEN];
1008         char linkname[MAXPATHLEN];
1009         int alloc_len, basename_len, linkname_len;
1010         int extra_len = file_extra_cnt * EXTRA_LEN;
1011         const char *basename;
1012         alloc_pool_t *pool;
1013         STRUCT_STAT st;
1014         char *bp;
1015
1016         if (strlcpy(thisname, fname, sizeof thisname) >= sizeof thisname) {
1017                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
1018                 return NULL;
1019         }
1020         clean_fname(thisname, 0);
1021         if (sanitize_paths)
1022                 sanitize_path(thisname, thisname, "", 0);
1023
1024         if (stp && S_ISDIR(stp->st_mode)) {
1025                 st = *stp; /* Needed for "symlink/." with --relative. */
1026                 *linkname = '\0'; /* make IBM code checker happy */
1027         } else if (readlink_stat(thisname, &st, linkname) != 0) {
1028                 int save_errno = errno;
1029                 /* See if file is excluded before reporting an error. */
1030                 if (filter_level != NO_FILTERS
1031                  && (is_excluded(thisname, 0, filter_level)
1032                   || is_excluded(thisname, 1, filter_level))) {
1033                         if (ignore_perishable && save_errno != ENOENT)
1034                                 non_perishable_cnt++;
1035                         return NULL;
1036                 }
1037                 if (save_errno == ENOENT) {
1038 #ifdef SUPPORT_LINKS
1039                         /* Avoid "vanished" error if symlink points nowhere. */
1040                         if (copy_links && x_lstat(thisname, &st, NULL) == 0
1041                             && S_ISLNK(st.st_mode)) {
1042                                 io_error |= IOERR_GENERAL;
1043                                 rprintf(FERROR_XFER, "symlink has no referent: %s\n",
1044                                         full_fname(thisname));
1045                         } else
1046 #endif
1047                         {
1048                                 enum logcode c = am_daemon && protocol_version < 28
1049                                                ? FERROR : FWARNING;
1050                                 io_error |= IOERR_VANISHED;
1051                                 rprintf(c, "file has vanished: %s\n",
1052                                         full_fname(thisname));
1053                         }
1054                 } else {
1055                         io_error |= IOERR_GENERAL;
1056                         rsyserr(FERROR_XFER, save_errno, "readlink %s failed",
1057                                 full_fname(thisname));
1058                 }
1059                 return NULL;
1060         }
1061
1062         /* backup.c calls us with filter_level set to NO_FILTERS. */
1063         if (filter_level == NO_FILTERS)
1064                 goto skip_filters;
1065
1066         if (S_ISDIR(st.st_mode)) {
1067                 if (!xfer_dirs) {
1068                         rprintf(FINFO, "skipping directory %s\n", thisname);
1069                         return NULL;
1070                 }
1071                 /* -x only affects dirs because we need to avoid recursing
1072                  * into a mount-point directory, not to avoid copying a
1073                  * symlinked file if -L (or similar) was specified. */
1074                 if (one_file_system && st.st_dev != filesystem_dev
1075                  && BITS_SETnUNSET(flags, FLAG_CONTENT_DIR, FLAG_TOP_DIR)) {
1076                         if (one_file_system > 1) {
1077                                 if (verbose > 1) {
1078                                         rprintf(FINFO,
1079                                             "[%s] skipping mount-point dir %s\n",
1080                                             who_am_i(), thisname);
1081                                 }
1082                                 return NULL;
1083                         }
1084                         flags |= FLAG_MOUNT_DIR;
1085                         flags &= ~FLAG_CONTENT_DIR;
1086                 }
1087         } else
1088                 flags &= ~FLAG_CONTENT_DIR;
1089
1090         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level)) {
1091                 if (ignore_perishable)
1092                         non_perishable_cnt++;
1093                 return NULL;
1094         }
1095
1096         if (lp_ignore_nonreadable(module_id)) {
1097 #ifdef SUPPORT_LINKS
1098                 if (!S_ISLNK(st.st_mode))
1099 #endif
1100                         if (access(thisname, R_OK) != 0)
1101                                 return NULL;
1102         }
1103
1104   skip_filters:
1105
1106         /* Only divert a directory in the main transfer. */
1107         if (flist) {
1108                 if (flist->prev && S_ISDIR(st.st_mode)
1109                  && flags & FLAG_DIVERT_DIRS) {
1110                         /* Room for parent/sibling/next-child info. */
1111                         extra_len += DIRNODE_EXTRA_CNT * EXTRA_LEN;
1112                         if (relative_paths)
1113                                 extra_len += PTR_EXTRA_CNT * EXTRA_LEN;
1114                         pool = dir_flist->file_pool;
1115                 } else
1116                         pool = flist->file_pool;
1117         } else
1118                 pool = NULL;
1119
1120         if (verbose > 2) {
1121                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
1122                         who_am_i(), thisname, filter_level);
1123         }
1124
1125         if ((basename = strrchr(thisname, '/')) != NULL) {
1126                 int len = basename++ - thisname;
1127                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
1128                         lastdir = new_array(char, len + 1);
1129                         memcpy(lastdir, thisname, len);
1130                         lastdir[len] = '\0';
1131                         lastdir_len = len;
1132                 }
1133         } else
1134                 basename = thisname;
1135         basename_len = strlen(basename) + 1; /* count the '\0' */
1136
1137 #ifdef SUPPORT_LINKS
1138         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
1139 #else
1140         linkname_len = 0;
1141 #endif
1142
1143         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
1144                 extra_len += EXTRA_LEN;
1145
1146 #if EXTRA_ROUNDING > 0
1147         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
1148                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
1149 #endif
1150
1151         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
1152                   + linkname_len;
1153         if (pool)
1154                 bp = pool_alloc(pool, alloc_len, "make_file");
1155         else {
1156                 if (!(bp = new_array(char, alloc_len)))
1157                         out_of_memory("make_file");
1158         }
1159
1160         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
1161         bp += extra_len;
1162         file = (struct file_struct *)bp;
1163         bp += FILE_STRUCT_LEN;
1164
1165         memcpy(bp, basename, basename_len);
1166         bp += basename_len + linkname_len; /* skip space for symlink too */
1167
1168 #ifdef SUPPORT_HARD_LINKS
1169         if (preserve_hard_links && flist && flist->prev) {
1170                 if (protocol_version >= 28
1171                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
1172                  : S_ISREG(st.st_mode)) {
1173                         tmp_dev = st.st_dev;
1174                         tmp_ino = st.st_ino;
1175                 } else
1176                         tmp_dev = 0;
1177         }
1178 #endif
1179
1180 #ifdef HAVE_STRUCT_STAT_ST_RDEV
1181         if (IS_DEVICE(st.st_mode) || IS_SPECIAL(st.st_mode)) {
1182                 tmp_rdev = st.st_rdev;
1183                 st.st_size = 0;
1184         }
1185 #endif
1186
1187         file->flags = flags;
1188         file->modtime = st.st_mtime;
1189         file->len32 = (uint32)st.st_size;
1190         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
1191                 file->flags |= FLAG_LENGTH64;
1192                 OPT_EXTRA(file, 0)->unum = (uint32)(st.st_size >> 32);
1193         }
1194         file->mode = st.st_mode;
1195         if (uid_ndx)
1196                 F_OWNER(file) = st.st_uid;
1197         if (gid_ndx)
1198                 F_GROUP(file) = st.st_gid;
1199
1200         if (basename != thisname)
1201                 file->dirname = lastdir;
1202
1203 #ifdef SUPPORT_LINKS
1204         if (linkname_len) {
1205                 bp = (char*)file->basename + basename_len;
1206                 memcpy(bp, linkname, linkname_len);
1207         }
1208 #endif
1209
1210         if (always_checksum && am_sender && S_ISREG(st.st_mode))
1211                 file_checksum(thisname, tmp_sum, st.st_size);
1212
1213         F_PATHNAME(file) = pathname;
1214
1215         /* This code is only used by the receiver when it is building
1216          * a list of files for a delete pass. */
1217         if (keep_dirlinks && linkname_len && flist) {
1218                 STRUCT_STAT st2;
1219                 int save_mode = file->mode;
1220                 file->mode = S_IFDIR; /* Find a directory with our name. */
1221                 if (flist_find(dir_flist, file) >= 0
1222                  && x_stat(thisname, &st2, NULL) == 0 && S_ISDIR(st2.st_mode)) {
1223                         file->modtime = st2.st_mtime;
1224                         file->len32 = 0;
1225                         file->mode = st2.st_mode;
1226                         if (uid_ndx)
1227                                 F_OWNER(file) = st2.st_uid;
1228                         if (gid_ndx)
1229                                 F_GROUP(file) = st2.st_gid;
1230                 } else
1231                         file->mode = save_mode;
1232         }
1233
1234         if (basename_len == 0+1)
1235                 return NULL;
1236
1237         if (unsort_ndx)
1238                 F_NDX(file) = dir_count;
1239
1240         return file;
1241 }
1242
1243 /* Only called for temporary file_struct entries created by make_file(). */
1244 void unmake_file(struct file_struct *file)
1245 {
1246         int extra_cnt = file_extra_cnt + LEN64_BUMP(file);
1247 #if EXTRA_ROUNDING > 0
1248         if (extra_cnt & EXTRA_ROUNDING)
1249                 extra_cnt = (extra_cnt | EXTRA_ROUNDING) + 1;
1250 #endif
1251         free(REQ_EXTRA(file, extra_cnt));
1252 }
1253
1254 static struct file_struct *send_file_name(int f, struct file_list *flist,
1255                                           char *fname, STRUCT_STAT *stp,
1256                                           int flags, int filter_level)
1257 {
1258         struct file_struct *file;
1259 #if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
1260         stat_x sx;
1261 #endif
1262
1263         file = make_file(fname, flist, stp, flags, filter_level);
1264         if (!file)
1265                 return NULL;
1266
1267         if (chmod_modes && !S_ISLNK(file->mode))
1268                 file->mode = tweak_mode(file->mode, chmod_modes);
1269
1270 #ifdef SUPPORT_ACLS
1271         if (preserve_acls && !S_ISLNK(file->mode) && f >= 0) {
1272                 sx.st.st_mode = file->mode;
1273                 sx.acc_acl = sx.def_acl = NULL;
1274                 if (get_acl(fname, &sx) < 0)
1275                         return NULL;
1276         }
1277 #endif
1278 #ifdef SUPPORT_XATTRS
1279         if (preserve_xattrs && f >= 0) {
1280                 sx.xattr = NULL;
1281                 if (get_xattr(fname, &sx) < 0)
1282                         return NULL;
1283         }
1284 #endif
1285
1286         maybe_emit_filelist_progress(flist->used + flist_count_offset);
1287
1288         flist_expand(flist, 1);
1289         flist->files[flist->used++] = file;
1290         if (f >= 0) {
1291                 if (S_ISDIR(file->mode))
1292                         dir_count++;
1293                 send_file_entry(f, file, flist->used - 1, flist->ndx_start);
1294 #ifdef SUPPORT_ACLS
1295                 if (preserve_acls && !S_ISLNK(file->mode)) {
1296                         send_acl(&sx, f);
1297                         free_acl(&sx);
1298                 }
1299 #endif
1300 #ifdef SUPPORT_XATTRS
1301                 if (preserve_xattrs) {
1302                         F_XATTR(file) = send_xattr(&sx, f);
1303                         free_xattr(&sx);
1304                 }
1305 #endif
1306         }
1307         return file;
1308 }
1309
1310 static void send_if_directory(int f, struct file_list *flist,
1311                               struct file_struct *file,
1312                               char *fbuf, unsigned int ol,
1313                               int flags)
1314 {
1315         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1316
1317         if (S_ISDIR(file->mode)
1318             && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) {
1319                 void *save_filters;
1320                 unsigned int len = strlen(fbuf);
1321                 if (len > 1 && fbuf[len-1] == '/')
1322                         fbuf[--len] = '\0';
1323                 if (len >= MAXPATHLEN - 1) {
1324                         io_error |= IOERR_GENERAL;
1325                         rprintf(FERROR_XFER, "skipping long-named directory: %s\n",
1326                                 full_fname(fbuf));
1327                         return;
1328                 }
1329                 save_filters = push_local_filters(fbuf, len);
1330                 send_directory(f, flist, fbuf, len, flags);
1331                 pop_local_filters(save_filters);
1332                 fbuf[ol] = '\0';
1333                 if (is_dot_dir)
1334                         fbuf[ol-1] = '.';
1335         }
1336 }
1337
1338 static int file_compare(const void *file1, const void *file2)
1339 {
1340         return f_name_cmp(*(struct file_struct **)file1,
1341                           *(struct file_struct **)file2);
1342 }
1343
1344 /* The guts of a merge-sort algorithm.  This was derived from the glibc
1345  * version, but I (Wayne) changed the merge code to do less copying and
1346  * to require only half the amount of temporary memory. */
1347 static void fsort_tmp(struct file_struct **fp, size_t num,
1348                       struct file_struct **tmp)
1349 {
1350         struct file_struct **f1, **f2, **t;
1351         size_t n1, n2;
1352
1353         n1 = num / 2;
1354         n2 = num - n1;
1355         f1 = fp;
1356         f2 = fp + n1;
1357
1358         if (n1 > 1)
1359                 fsort_tmp(f1, n1, tmp);
1360         if (n2 > 1)
1361                 fsort_tmp(f2, n2, tmp);
1362
1363         while (f_name_cmp(*f1, *f2) <= 0) {
1364                 if (!--n1)
1365                         return;
1366                 f1++;
1367         }
1368
1369         t = tmp;
1370         memcpy(t, f1, n1 * PTR_SIZE);
1371
1372         *f1++ = *f2++, n2--;
1373
1374         while (n1 > 0 && n2 > 0) {
1375                 if (f_name_cmp(*t, *f2) <= 0)
1376                         *f1++ = *t++, n1--;
1377                 else
1378                         *f1++ = *f2++, n2--;
1379         }
1380
1381         if (n1 > 0)
1382                 memcpy(f1, t, n1 * PTR_SIZE);
1383 }
1384
1385 /* This file-struct sorting routine makes sure that any identical names in
1386  * the file list stay in the same order as they were in the original list.
1387  * This is particularly vital in inc_recurse mode where we expect a sort
1388  * on the flist to match the exact order of a sort on the dir_flist. */
1389 static void fsort(struct file_struct **fp, size_t num)
1390 {
1391         if (num <= 1)
1392                 return;
1393
1394         if (use_qsort)
1395                 qsort(fp, num, PTR_SIZE, file_compare);
1396         else {
1397                 struct file_struct **tmp = new_array(struct file_struct *,
1398                                                      (num+1) / 2);
1399                 fsort_tmp(fp, num, tmp);
1400                 free(tmp);
1401         }
1402 }
1403
1404 /* We take an entire set of sibling dirs from the sorted flist and link them
1405  * into the tree, setting the appropriate parent/child/sibling pointers. */
1406 static void add_dirs_to_tree(int parent_ndx, struct file_list *from_flist,
1407                              int dir_cnt)
1408 {
1409         int i;
1410         int32 *dp = NULL;
1411         int32 *parent_dp = parent_ndx < 0 ? NULL
1412                          : F_DIR_NODE_P(dir_flist->sorted[parent_ndx]);
1413
1414         flist_expand(dir_flist, dir_cnt);
1415         dir_flist->sorted = dir_flist->files;
1416
1417         for (i = 0; dir_cnt; i++) {
1418                 struct file_struct *file = from_flist->sorted[i];
1419
1420                 if (!S_ISDIR(file->mode))
1421                         continue;
1422
1423                 dir_flist->files[dir_flist->used++] = file;
1424                 dir_cnt--;
1425
1426                 if (file->basename[0] == '.' && file->basename[1] == '\0')
1427                         continue;
1428
1429                 if (dp)
1430                         DIR_NEXT_SIBLING(dp) = dir_flist->used - 1;
1431                 else if (parent_dp)
1432                         DIR_FIRST_CHILD(parent_dp) = dir_flist->used - 1;
1433                 else
1434                         send_dir_ndx = dir_flist->used - 1;
1435
1436                 dp = F_DIR_NODE_P(file);
1437                 DIR_PARENT(dp) = parent_ndx;
1438                 DIR_FIRST_CHILD(dp) = -1;
1439         }
1440         if (dp)
1441                 DIR_NEXT_SIBLING(dp) = -1;
1442 }
1443
1444 /* This function is normally called by the sender, but the receiving side also
1445  * calls it from get_dirlist() with f set to -1 so that we just construct the
1446  * file list in memory without sending it over the wire.  Also, get_dirlist()
1447  * might call this with f set to -2, which also indicates that local filter
1448  * rules should be ignored. */
1449 static void send_directory(int f, struct file_list *flist, char *fbuf, int len,
1450                            int flags)
1451 {
1452         struct dirent *di;
1453         unsigned remainder;
1454         char *p;
1455         DIR *d;
1456         int divert_dirs = (flags & FLAG_DIVERT_DIRS) != 0;
1457         int start = flist->used;
1458         int filter_level = f == -2 ? SERVER_FILTERS : ALL_FILTERS;
1459
1460         assert(flist != NULL);
1461
1462         if (!(d = opendir(fbuf))) {
1463                 io_error |= IOERR_GENERAL;
1464                 rsyserr(FERROR_XFER, errno, "opendir %s failed", full_fname(fbuf));
1465                 return;
1466         }
1467
1468         p = fbuf + len;
1469         if (len != 1 || *fbuf != '/')
1470                 *p++ = '/';
1471         *p = '\0';
1472         remainder = MAXPATHLEN - (p - fbuf);
1473
1474         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1475                 char *dname = d_name(di);
1476                 if (dname[0] == '.' && (dname[1] == '\0'
1477                     || (dname[1] == '.' && dname[2] == '\0')))
1478                         continue;
1479                 if (strlcpy(p, dname, remainder) >= remainder) {
1480                         io_error |= IOERR_GENERAL;
1481                         rprintf(FINFO,
1482                                 "cannot send long-named file %s\n",
1483                                 full_fname(fbuf));
1484                         continue;
1485                 }
1486                 if (dname[0] == '\0') {
1487                         io_error |= IOERR_GENERAL;
1488                         rprintf(FINFO,
1489                                 "cannot send file with empty name in %s\n",
1490                                 full_fname(fbuf));
1491                         continue;
1492                 }
1493
1494                 send_file_name(f, flist, fbuf, NULL, flags, filter_level);
1495         }
1496
1497         fbuf[len] = '\0';
1498
1499         if (errno) {
1500                 io_error |= IOERR_GENERAL;
1501                 rsyserr(FERROR_XFER, errno, "readdir(%s)", full_fname(fbuf));
1502         }
1503
1504         closedir(d);
1505
1506         if (f >= 0 && recurse && !divert_dirs) {
1507                 int i, end = flist->used - 1;
1508                 /* send_if_directory() bumps flist->used, so use "end". */
1509                 for (i = start; i <= end; i++)
1510                         send_if_directory(f, flist, flist->files[i], fbuf, len, flags);
1511         }
1512 }
1513
1514 static char lastpath[MAXPATHLEN] = "";
1515 static int lastpath_len = 0;
1516 static struct file_struct *lastpath_struct;
1517
1518 static void send_implied_dirs(int f, struct file_list *flist, char *fname,
1519                               char *start, char *limit, int flags, char name_type)
1520 {
1521         struct file_struct *file;
1522         item_list *relname_list;
1523         relnamecache **rnpp;
1524         char *slash;
1525         int len, need_new_dir;
1526
1527         flags = (flags | FLAG_IMPLIED_DIR) & ~(FLAG_TOP_DIR | FLAG_CONTENT_DIR);
1528
1529         if (inc_recurse) {
1530                 if (lastpath_struct && F_PATHNAME(lastpath_struct) == pathname
1531                  && lastpath_len == limit - fname
1532                  && strncmp(lastpath, fname, lastpath_len) == 0)
1533                         need_new_dir = 0;
1534                 else
1535                         need_new_dir = 1;
1536         } else
1537                 need_new_dir = 1;
1538
1539         if (need_new_dir) {
1540                 int save_copy_links = copy_links;
1541                 int save_xfer_dirs = xfer_dirs;
1542
1543                 copy_links = xfer_dirs = 1;
1544
1545                 *limit = '\0';
1546
1547                 for (slash = start; (slash = strchr(slash+1, '/')) != NULL; ) {
1548                         *slash = '\0';
1549                         send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1550                         *slash = '/';
1551                 }
1552
1553                 file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1554                 if (inc_recurse) {
1555                         if (file && !S_ISDIR(file->mode))
1556                                 file = NULL;
1557                         lastpath_struct = file;
1558                 }
1559
1560                 strlcpy(lastpath, fname, sizeof lastpath);
1561                 lastpath_len = limit - fname;
1562
1563                 *limit = '/';
1564
1565                 copy_links = save_copy_links;
1566                 xfer_dirs = save_xfer_dirs;
1567
1568                 if (!inc_recurse)
1569                         return;
1570         }
1571
1572         if (!lastpath_struct)
1573                 return; /* dir must have vanished */
1574
1575         len = strlen(limit+1);
1576         memcpy(&relname_list, F_DIR_RELNAMES_P(lastpath_struct), sizeof relname_list);
1577         if (!relname_list) {
1578                 if (!(relname_list = new0(item_list)))
1579                         out_of_memory("send_implied_dirs");
1580                 memcpy(F_DIR_RELNAMES_P(lastpath_struct), &relname_list, sizeof relname_list);
1581         }
1582         rnpp = EXPAND_ITEM_LIST(relname_list, relnamecache *, 32);
1583         if (!(*rnpp = (relnamecache*)new_array(char, sizeof (relnamecache) + len)))
1584                 out_of_memory("send_implied_dirs");
1585         (*rnpp)->name_type = name_type;
1586         strlcpy((*rnpp)->fname, limit+1, len + 1);
1587 }
1588
1589 static void send1extra(int f, struct file_struct *file, struct file_list *flist)
1590 {
1591         char fbuf[MAXPATHLEN];
1592         item_list *relname_list;
1593         int len, dlen, flags = FLAG_DIVERT_DIRS | FLAG_CONTENT_DIR;
1594         size_t j;
1595
1596         f_name(file, fbuf);
1597         dlen = strlen(fbuf);
1598
1599         if (F_PATHNAME(file) != pathname) {
1600                 if (!push_pathname(F_PATHNAME(file), -1))
1601                         exit_cleanup(RERR_FILESELECT);
1602         }
1603
1604         change_local_filter_dir(fbuf, dlen, send_dir_depth);
1605
1606         if (file->flags & FLAG_CONTENT_DIR) {
1607                 if (one_file_system) {
1608                         STRUCT_STAT st;
1609                         if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1610                                 io_error |= IOERR_GENERAL;
1611                                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1612                                         full_fname(fbuf));
1613                                 return;
1614                         }
1615                         filesystem_dev = st.st_dev;
1616                 }
1617                 send_directory(f, flist, fbuf, dlen, flags);
1618         }
1619
1620         if (!relative_paths)
1621                 return;
1622
1623         memcpy(&relname_list, F_DIR_RELNAMES_P(file), sizeof relname_list);
1624         if (!relname_list)
1625                 return;
1626
1627         for (j = 0; j < relname_list->count; j++) {
1628                 char *slash;
1629                 relnamecache *rnp = ((relnamecache**)relname_list->items)[j];
1630                 char name_type = rnp->name_type;
1631
1632                 fbuf[dlen] = '/';
1633                 len = strlcpy(fbuf + dlen + 1, rnp->fname, sizeof fbuf - dlen - 1);
1634                 free(rnp);
1635                 if (len >= (int)sizeof fbuf)
1636                         continue; /* Impossible... */
1637
1638                 slash = strchr(fbuf+dlen+1, '/');
1639                 if (slash) {
1640                         send_implied_dirs(f, flist, fbuf, fbuf+dlen+1, slash, flags, name_type);
1641                         continue;
1642                 }
1643
1644                 if (name_type != NORMAL_NAME) {
1645                         STRUCT_STAT st;
1646                         if (link_stat(fbuf, &st, 1) != 0) {
1647                                 io_error |= IOERR_GENERAL;
1648                                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1649                                         full_fname(fbuf));
1650                                 continue;
1651                         }
1652                         send_file_name(f, flist, fbuf, &st, FLAG_TOP_DIR | flags, ALL_FILTERS);
1653                 } else
1654                         send_file_name(f, flist, fbuf, NULL, FLAG_TOP_DIR | flags, ALL_FILTERS);
1655         }
1656
1657         free(relname_list);
1658 }
1659
1660 void send_extra_file_list(int f, int at_least)
1661 {
1662         struct file_list *flist;
1663         int64 start_write;
1664         uint16 prev_flags;
1665         int old_cnt, save_io_error = io_error;
1666
1667         if (flist_eof)
1668                 return;
1669
1670         /* Keep sending data until we have the requested number of
1671          * files in the upcoming file-lists. */
1672         old_cnt = cur_flist->used;
1673         for (flist = first_flist; flist != cur_flist; flist = flist->next)
1674                 old_cnt += flist->used;
1675         while (file_total - old_cnt < at_least) {
1676                 struct file_struct *file = dir_flist->sorted[send_dir_ndx];
1677                 int dir_ndx, dstart = dir_count;
1678                 const char *pathname = F_PATHNAME(file);
1679                 int32 *dp;
1680
1681                 flist = flist_new(0, "send_extra_file_list");
1682                 start_write = stats.total_written;
1683
1684                 if (unsort_ndx)
1685                         dir_ndx = F_NDX(file);
1686                 else
1687                         dir_ndx = send_dir_ndx;
1688                 write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
1689                 flist->parent_ndx = dir_ndx;
1690
1691                 send1extra(f, file, flist);
1692                 prev_flags = file->flags;
1693                 dp = F_DIR_NODE_P(file);
1694
1695                 /* If there are any duplicate directory names that follow, we
1696                  * send all the dirs together in one file-list.  The dir_flist
1697                  * tree links all the child subdirs onto the last dup dir. */
1698                 while ((dir_ndx = DIR_NEXT_SIBLING(dp)) >= 0
1699                     && dir_flist->sorted[dir_ndx]->flags & FLAG_DUPLICATE) {
1700                         send_dir_ndx = dir_ndx;
1701                         file = dir_flist->sorted[dir_ndx];
1702                         /* Try to avoid some duplicate scanning of identical dirs. */
1703                         if (F_PATHNAME(file) == pathname && prev_flags & FLAG_CONTENT_DIR)
1704                                 file->flags &= ~FLAG_CONTENT_DIR;
1705                         send1extra(f, file, flist);
1706                         prev_flags = file->flags;
1707                         dp = F_DIR_NODE_P(file);
1708                 }
1709
1710                 write_byte(f, 0);
1711
1712                 if (need_unsorted_flist) {
1713                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
1714                                 out_of_memory("send_extra_file_list");
1715                         memcpy(flist->sorted, flist->files,
1716                                flist->used * sizeof (struct file_struct*));
1717                 } else
1718                         flist->sorted = flist->files;
1719
1720                 flist_sort_and_clean(flist, 0);
1721
1722                 add_dirs_to_tree(send_dir_ndx, flist, dir_count - dstart);
1723                 flist_done_allocating(flist);
1724
1725                 file_total += flist->used;
1726                 stats.flist_size += stats.total_written - start_write;
1727                 stats.num_files += flist->used;
1728                 if (verbose > 3)
1729                         output_flist(flist);
1730
1731                 if (DIR_FIRST_CHILD(dp) >= 0) {
1732                         send_dir_ndx = DIR_FIRST_CHILD(dp);
1733                         send_dir_depth++;
1734                 } else {
1735                         while (DIR_NEXT_SIBLING(dp) < 0) {
1736                                 if ((send_dir_ndx = DIR_PARENT(dp)) < 0) {
1737                                         write_ndx(f, NDX_FLIST_EOF);
1738                                         flist_eof = 1;
1739                                         change_local_filter_dir(NULL, 0, 0);
1740                                         goto finish;
1741                                 }
1742                                 send_dir_depth--;
1743                                 file = dir_flist->sorted[send_dir_ndx];
1744                                 dp = F_DIR_NODE_P(file);
1745                         }
1746                         send_dir_ndx = DIR_NEXT_SIBLING(dp);
1747                 }
1748         }
1749
1750   finish:
1751         if (io_error != save_io_error && !ignore_errors)
1752                 send_msg_int(MSG_IO_ERROR, io_error);
1753 }
1754
1755 struct file_list *send_file_list(int f, int argc, char *argv[])
1756 {
1757         static const char *lastdir;
1758         static int lastdir_len = -1;
1759         int len, dirlen;
1760         STRUCT_STAT st;
1761         char *p, *dir;
1762         struct file_list *flist;
1763         struct timeval start_tv, end_tv;
1764         int64 start_write;
1765         int use_ff_fd = 0;
1766         int disable_buffering;
1767         int flags = recurse ? FLAG_CONTENT_DIR : 0;
1768         int reading_remotely = filesfrom_host != NULL;
1769         int rl_flags = (reading_remotely ? 0 : RL_DUMP_COMMENTS)
1770 #ifdef ICONV_OPTION
1771                      | (filesfrom_convert ? RL_CONVERT : 0)
1772 #endif
1773                      | (eol_nulls || reading_remotely ? RL_EOL_NULLS : 0);
1774
1775         rprintf(FLOG, "building file list\n");
1776         if (show_filelist_p())
1777                 start_filelist_progress("building file list");
1778         else if (inc_recurse && verbose && !am_server)
1779                 rprintf(FCLIENT, "sending incremental file list\n");
1780
1781         start_write = stats.total_written;
1782         gettimeofday(&start_tv, NULL);
1783
1784         if (relative_paths && protocol_version >= 30)
1785                 implied_dirs = 1; /* We send flagged implied dirs */
1786
1787 #ifdef SUPPORT_HARD_LINKS
1788         if (preserve_hard_links && protocol_version >= 30 && !cur_flist)
1789                 init_hard_links();
1790 #endif
1791
1792         flist = cur_flist = flist_new(0, "send_file_list");
1793         if (inc_recurse) {
1794                 dir_flist = flist_new(FLIST_TEMP, "send_file_list");
1795                 flags |= FLAG_DIVERT_DIRS;
1796         } else
1797                 dir_flist = cur_flist;
1798
1799         disable_buffering = io_start_buffering_out(f);
1800         if (filesfrom_fd >= 0) {
1801                 if (argv[0] && !push_dir(argv[0], 0)) {
1802                         rsyserr(FERROR_XFER, errno, "push_dir %s failed in %s",
1803                                 full_fname(argv[0]), curr_dir);
1804                         exit_cleanup(RERR_FILESELECT);
1805                 }
1806                 use_ff_fd = 1;
1807         }
1808
1809         while (1) {
1810                 char fbuf[MAXPATHLEN], *fn, name_type;
1811
1812                 if (use_ff_fd) {
1813                         if (read_line(filesfrom_fd, fbuf, sizeof fbuf, rl_flags) == 0)
1814                                 break;
1815                         sanitize_path(fbuf, fbuf, "", 0);
1816                 } else {
1817                         if (argc-- == 0)
1818                                 break;
1819                         strlcpy(fbuf, *argv++, MAXPATHLEN);
1820                         if (sanitize_paths)
1821                                 sanitize_path(fbuf, fbuf, "", 0);
1822                 }
1823
1824                 len = strlen(fbuf);
1825                 if (relative_paths) {
1826                         /* We clean up fbuf below. */
1827                         name_type = NORMAL_NAME;
1828                 } else if (!len || fbuf[len - 1] == '/') {
1829                         if (len == 2 && fbuf[0] == '.') {
1830                                 /* Turn "./" into just "." rather than "./." */
1831                                 fbuf[1] = '\0';
1832                         } else {
1833                                 if (len + 1 >= MAXPATHLEN)
1834                                         overflow_exit("send_file_list");
1835                                 fbuf[len++] = '.';
1836                                 fbuf[len] = '\0';
1837                         }
1838                         name_type = DOT_NAME;
1839                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
1840                     && (len == 2 || fbuf[len-3] == '/')) {
1841                         if (len + 2 >= MAXPATHLEN)
1842                                 overflow_exit("send_file_list");
1843                         fbuf[len++] = '/';
1844                         fbuf[len++] = '.';
1845                         fbuf[len] = '\0';
1846                         name_type = DOT_NAME;
1847                 } else if (fbuf[len-1] == '.' && (len == 1 || fbuf[len-2] == '/'))
1848                         name_type = DOT_NAME;
1849                 else
1850                         name_type = NORMAL_NAME;
1851
1852                 dir = NULL;
1853
1854                 if (!relative_paths) {
1855                         p = strrchr(fbuf, '/');
1856                         if (p) {
1857                                 *p = '\0';
1858                                 if (p == fbuf)
1859                                         dir = "/";
1860                                 else
1861                                         dir = fbuf;
1862                                 len -= p - fbuf + 1;
1863                                 fn = p + 1;
1864                         } else
1865                                 fn = fbuf;
1866                 } else {
1867                         if ((p = strstr(fbuf, "/./")) != NULL) {
1868                                 *p = '\0';
1869                                 if (p == fbuf)
1870                                         dir = "/";
1871                                 else
1872                                         dir = fbuf;
1873                                 fn = p + 3;
1874                                 while (*fn == '/')
1875                                         fn++;
1876                                 if (!*fn)
1877                                         *--fn = '\0'; /* ensure room for '.' */
1878                         } else
1879                                 fn = fbuf;
1880                         len = clean_fname(fn, CFN_KEEP_LEADING_DOT_DIR
1881                                             | CFN_KEEP_TRAILING_SLASH
1882                                             | CFN_DROP_TRAILING_DOT_DIR);
1883                         if (len == 1) {
1884                                 if (fn[0] == '/') {
1885                                         fn = "/.";
1886                                         len = 2;
1887                                         name_type = DOT_NAME;
1888                                 } else if (fn[0] == '.')
1889                                         name_type = DOT_NAME;
1890                         } else if (fn[len-1] == '/') {
1891                                 fn[--len] = '\0';
1892                                 if (len == 1 && *fn == '.')
1893                                         name_type = DOT_NAME;
1894                                 else
1895                                         name_type = SLASH_ENDING_NAME;
1896                         }
1897                         /* Reject a ".." dir in the active part of the path. */
1898                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
1899                                 if ((p[2] == '/' || p[2] == '\0')
1900                                  && (p == fn || p[-1] == '/')) {
1901                                         rprintf(FERROR,
1902                                             "found \"..\" dir in relative path: %s\n",
1903                                             fn);
1904                                         exit_cleanup(RERR_SYNTAX);
1905                                 }
1906                         }
1907                 }
1908
1909                 if (!*fn) {
1910                         len = 1;
1911                         fn = ".";
1912                         name_type = DOT_NAME;
1913                 }
1914
1915                 dirlen = dir ? strlen(dir) : 0;
1916                 if (dirlen != lastdir_len || memcmp(lastdir, dir, dirlen) != 0) {
1917                         if (!push_pathname(dir ? strdup(dir) : NULL, dirlen))
1918                                 continue;
1919                         lastdir = pathname;
1920                         lastdir_len = pathname_len;
1921                 } else if (!push_pathname(lastdir, lastdir_len))
1922                         continue;
1923
1924                 if (fn != fbuf)
1925                         memmove(fbuf, fn, len + 1);
1926
1927                 if (link_stat(fbuf, &st, copy_dirlinks || name_type != NORMAL_NAME) != 0) {
1928                         io_error |= IOERR_GENERAL;
1929                         rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1930                                 full_fname(fbuf));
1931                         continue;
1932                 }
1933
1934                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
1935                         rprintf(FINFO, "skipping directory %s\n", fbuf);
1936                         continue;
1937                 }
1938
1939                 if (inc_recurse && relative_paths && *fbuf) {
1940                         if ((p = strchr(fbuf+1, '/')) != NULL) {
1941                                 if (p - fbuf == 1 && *fbuf == '.') {
1942                                         if ((fn = strchr(p+1, '/')) != NULL)
1943                                                 p = fn;
1944                                 } else
1945                                         fn = p;
1946                                 send_implied_dirs(f, flist, fbuf, fbuf, p, flags, name_type);
1947                                 if (fn == p)
1948                                         continue;
1949                         }
1950                 } else if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
1951                         /* Send the implied directories at the start of the
1952                          * source spec, so we get their permissions right. */
1953                         char *lp = lastpath, *slash = fbuf;
1954                         *p = '\0';
1955                         /* Skip any initial directories in our path that we
1956                          * have in common with lastpath. */
1957                         for (fn = fbuf; *fn && *lp == *fn; lp++, fn++) {
1958                                 if (*fn == '/')
1959                                         slash = fn;
1960                         }
1961                         *p = '/';
1962                         if (fn != p || (*lp && *lp != '/'))
1963                                 send_implied_dirs(f, flist, fbuf, slash, p, flags, 0);
1964                 }
1965
1966                 if (one_file_system)
1967                         filesystem_dev = st.st_dev;
1968
1969                 if (recurse || (xfer_dirs && name_type != NORMAL_NAME)) {
1970                         struct file_struct *file;
1971                         int top_flags = FLAG_TOP_DIR | FLAG_CONTENT_DIR | flags;
1972                         file = send_file_name(f, flist, fbuf, &st,
1973                                               top_flags, ALL_FILTERS);
1974                         if (inc_recurse) {
1975                                 if (name_type == DOT_NAME) {
1976                                         if (send_dir_depth < 0) {
1977                                                 send_dir_depth = 0;
1978                                                 change_local_filter_dir(fbuf, len, send_dir_depth);
1979                                         }
1980                                         send_directory(f, flist, fbuf, len, flags);
1981                                 }
1982                         } else if (file)
1983                                 send_if_directory(f, flist, file, fbuf, len, flags);
1984                 } else
1985                         send_file_name(f, flist, fbuf, &st, flags, ALL_FILTERS);
1986         }
1987
1988         gettimeofday(&end_tv, NULL);
1989         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
1990                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
1991         if (stats.flist_buildtime == 0)
1992                 stats.flist_buildtime = 1;
1993         start_tv = end_tv;
1994
1995         write_byte(f, 0); /* Indicate end of file list */
1996
1997 #ifdef SUPPORT_HARD_LINKS
1998         if (preserve_hard_links && protocol_version >= 30 && !inc_recurse)
1999                 idev_destroy();
2000 #endif
2001
2002         if (show_filelist_p())
2003                 finish_filelist_progress(flist);
2004
2005         gettimeofday(&end_tv, NULL);
2006         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2007                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2008
2009         /* When converting names, both sides keep an unsorted file-list array
2010          * because the names will differ on the sending and receiving sides
2011          * (both sides will use the unsorted index number for each item). */
2012
2013         /* Sort the list without removing any duplicates.  This allows the
2014          * receiving side to ask for whatever name it kept.  For incremental
2015          * recursion mode, the sender marks duplicate dirs so that it can
2016          * send them together in a single file-list. */
2017         if (need_unsorted_flist) {
2018                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2019                         out_of_memory("send_file_list");
2020                 memcpy(flist->sorted, flist->files,
2021                        flist->used * sizeof (struct file_struct*));
2022         } else
2023                 flist->sorted = flist->files;
2024         flist_sort_and_clean(flist, 0);
2025         file_total += flist->used;
2026
2027         if (!numeric_ids && !inc_recurse)
2028                 send_id_list(f);
2029
2030         /* send the io_error flag */
2031         if (protocol_version < 30)
2032                 write_int(f, ignore_errors ? 0 : io_error);
2033         else if (io_error && !ignore_errors)
2034                 send_msg_int(MSG_IO_ERROR, io_error);
2035
2036         if (disable_buffering)
2037                 io_end_buffering_out();
2038
2039         stats.flist_size = stats.total_written - start_write;
2040         stats.num_files = flist->used;
2041
2042         if (verbose > 3)
2043                 output_flist(flist);
2044
2045         if (verbose > 2)
2046                 rprintf(FINFO, "send_file_list done\n");
2047
2048         if (inc_recurse) {
2049                 send_dir_depth = 1;
2050                 add_dirs_to_tree(-1, flist, dir_count);
2051                 if (!file_total || strcmp(flist->sorted[0]->basename, ".") != 0)
2052                         flist->parent_ndx = -1;
2053                 flist_done_allocating(flist);
2054                 if (send_dir_ndx < 0) {
2055                         write_ndx(f, NDX_FLIST_EOF);
2056                         flist_eof = 1;
2057                 }
2058                 else if (file_total == 1) {
2059                         /* If we're creating incremental file-lists and there
2060                          * was just 1 item in the first file-list, send 1 more
2061                          * file-list to check if this is a 1-file xfer. */
2062                         send_extra_file_list(f, 1);
2063                 }
2064         }
2065
2066         return flist;
2067 }
2068
2069 struct file_list *recv_file_list(int f)
2070 {
2071         struct file_list *flist;
2072         int dstart, flags;
2073         int64 start_read;
2074
2075         if (!first_flist)
2076                 rprintf(FLOG, "receiving file list\n");
2077         if (show_filelist_p())
2078                 start_filelist_progress("receiving file list");
2079         else if (inc_recurse && verbose && !am_server && !first_flist)
2080                 rprintf(FCLIENT, "receiving incremental file list\n");
2081
2082         start_read = stats.total_read;
2083
2084 #ifdef SUPPORT_HARD_LINKS
2085         if (preserve_hard_links && !first_flist)
2086                 init_hard_links();
2087 #endif
2088
2089         flist = flist_new(0, "recv_file_list");
2090
2091         if (inc_recurse) {
2092                 if (flist->ndx_start == 1)
2093                         dir_flist = flist_new(FLIST_TEMP, "recv_file_list");
2094                 dstart = dir_flist->used;
2095         } else {
2096                 dir_flist = flist;
2097                 dstart = 0;
2098         }
2099
2100         while ((flags = read_byte(f)) != 0) {
2101                 struct file_struct *file;
2102
2103                 flist_expand(flist, 1);
2104
2105                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
2106                         flags |= read_byte(f) << 8;
2107                 file = recv_file_entry(flist, flags, f);
2108
2109                 if (inc_recurse && S_ISDIR(file->mode)) {
2110                         flist_expand(dir_flist, 1);
2111                         dir_flist->files[dir_flist->used++] = file;
2112                 }
2113
2114                 flist->files[flist->used++] = file;
2115
2116                 maybe_emit_filelist_progress(flist->used);
2117
2118                 if (verbose > 2) {
2119                         rprintf(FINFO, "recv_file_name(%s)\n",
2120                                 f_name(file, NULL));
2121                 }
2122         }
2123         file_total += flist->used;
2124
2125         if (verbose > 2)
2126                 rprintf(FINFO, "received %d names\n", flist->used);
2127
2128         if (show_filelist_p())
2129                 finish_filelist_progress(flist);
2130
2131         if (need_unsorted_flist) {
2132                 /* Create an extra array of index pointers that we can sort for
2133                  * the generator's use (for wading through the files in sorted
2134                  * order and for calling flist_find()).  We keep the "files"
2135                  * list unsorted for our exchange of index numbers with the
2136                  * other side (since their names may not sort the same). */
2137                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2138                         out_of_memory("recv_file_list");
2139                 memcpy(flist->sorted, flist->files,
2140                        flist->used * sizeof (struct file_struct*));
2141                 if (inc_recurse && dir_flist->used > dstart) {
2142                         static int dir_flist_malloced = 0;
2143                         if (dir_flist_malloced < dir_flist->malloced) {
2144                                 dir_flist->sorted = realloc_array(dir_flist->sorted,
2145                                                         struct file_struct *,
2146                                                         dir_flist->malloced);
2147                                 dir_flist_malloced = dir_flist->malloced;
2148                         }
2149                         memcpy(dir_flist->sorted + dstart, dir_flist->files + dstart,
2150                                (dir_flist->used - dstart) * sizeof (struct file_struct*));
2151                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2152                 }
2153         } else {
2154                 flist->sorted = flist->files;
2155                 if (inc_recurse && dir_flist->used > dstart) {
2156                         dir_flist->sorted = dir_flist->files;
2157                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2158                 }
2159         }
2160
2161         if (inc_recurse)
2162                 flist_done_allocating(flist);
2163         else if (f >= 0)
2164                 recv_id_list(f, flist);
2165
2166         flist_sort_and_clean(flist, relative_paths);
2167
2168         if (protocol_version < 30) {
2169                 /* Recv the io_error flag */
2170                 if (ignore_errors)
2171                         read_int(f);
2172                 else
2173                         io_error |= read_int(f);
2174         } else if (inc_recurse && flist->ndx_start == 1) {
2175                 if (!file_total || strcmp(flist->sorted[0]->basename, ".") != 0)
2176                         flist->parent_ndx = -1;
2177         }
2178
2179         if (verbose > 3)
2180                 output_flist(flist);
2181
2182         if (verbose > 2)
2183                 rprintf(FINFO, "recv_file_list done\n");
2184
2185         stats.flist_size += stats.total_read - start_read;
2186         stats.num_files += flist->used;
2187
2188         return flist;
2189 }
2190
2191 /* This is only used once by the receiver if the very first file-list
2192  * has exactly one item in it. */
2193 void recv_additional_file_list(int f)
2194 {
2195         struct file_list *flist;
2196         int ndx = read_ndx(f);
2197         if (ndx == NDX_FLIST_EOF) {
2198                 flist_eof = 1;
2199                 change_local_filter_dir(NULL, 0, 0);
2200         } else {
2201                 ndx = NDX_FLIST_OFFSET - ndx;
2202                 if (ndx < 0 || ndx >= dir_flist->used) {
2203                         ndx = NDX_FLIST_OFFSET - ndx;
2204                         rprintf(FERROR,
2205                                 "[%s] Invalid dir index: %d (%d - %d)\n",
2206                                 who_am_i(), ndx, NDX_FLIST_OFFSET,
2207                                 NDX_FLIST_OFFSET - dir_flist->used + 1);
2208                         exit_cleanup(RERR_PROTOCOL);
2209                 }
2210                 if (verbose > 3) {
2211                         rprintf(FINFO, "[%s] receiving flist for dir %d\n",
2212                                 who_am_i(), ndx);
2213                 }
2214                 flist = recv_file_list(f);
2215                 flist->parent_ndx = ndx;
2216         }
2217 }
2218
2219 /* Search for an identically-named item in the file list.  Note that the
2220  * items must agree in their directory-ness, or no match is returned. */
2221 int flist_find(struct file_list *flist, struct file_struct *f)
2222 {
2223         int low = flist->low, high = flist->high;
2224         int diff, mid, mid_up;
2225
2226         while (low <= high) {
2227                 mid = (low + high) / 2;
2228                 if (F_IS_ACTIVE(flist->sorted[mid]))
2229                         mid_up = mid;
2230                 else {
2231                         /* Scan for the next non-empty entry using the cached
2232                          * distance values.  If the value isn't fully up-to-
2233                          * date, update it. */
2234                         mid_up = mid + F_DEPTH(flist->sorted[mid]);
2235                         if (!F_IS_ACTIVE(flist->sorted[mid_up])) {
2236                                 do {
2237                                     mid_up += F_DEPTH(flist->sorted[mid_up]);
2238                                 } while (!F_IS_ACTIVE(flist->sorted[mid_up]));
2239                                 F_DEPTH(flist->sorted[mid]) = mid_up - mid;
2240                         }
2241                         if (mid_up > high) {
2242                                 /* If there's nothing left above us, set high to
2243                                  * a non-empty entry below us and continue. */
2244                                 high = mid - (int)flist->sorted[mid]->len32;
2245                                 if (!F_IS_ACTIVE(flist->sorted[high])) {
2246                                         do {
2247                                             high -= (int)flist->sorted[high]->len32;
2248                                         } while (!F_IS_ACTIVE(flist->sorted[high]));
2249                                         flist->sorted[mid]->len32 = mid - high;
2250                                 }
2251                                 continue;
2252                         }
2253                 }
2254                 diff = f_name_cmp(flist->sorted[mid_up], f);
2255                 if (diff == 0) {
2256                         if (protocol_version < 29
2257                             && S_ISDIR(flist->sorted[mid_up]->mode)
2258                             != S_ISDIR(f->mode))
2259                                 return -1;
2260                         return mid_up;
2261                 }
2262                 if (diff < 0)
2263                         low = mid_up + 1;
2264                 else
2265                         high = mid - 1;
2266         }
2267         return -1;
2268 }
2269
2270 /*
2271  * Free up any resources a file_struct has allocated
2272  * and clear the file.
2273  */
2274 void clear_file(struct file_struct *file)
2275 {
2276         /* The +1 zeros out the first char of the basename. */
2277         memset(file, 0, FILE_STRUCT_LEN + 1);
2278         /* In an empty entry, F_DEPTH() is an offset to the next non-empty
2279          * entry.  Likewise for len32 in the opposite direction.  We assume
2280          * that we're alone for now since flist_find() will adjust the counts
2281          * it runs into that aren't up-to-date. */
2282         file->len32 = F_DEPTH(file) = 1;
2283 }
2284
2285 /* Allocate a new file list. */
2286 struct file_list *flist_new(int flags, char *msg)
2287 {
2288         struct file_list *flist;
2289
2290         if (!(flist = new0(struct file_list)))
2291                 out_of_memory(msg);
2292
2293         if (flags & FLIST_TEMP) {
2294                 if (!(flist->file_pool = pool_create(SMALL_EXTENT, 0,
2295                                                 out_of_memory, POOL_INTERN)))
2296                         out_of_memory(msg);
2297         } else {
2298                 /* This is a doubly linked list with prev looping back to
2299                  * the end of the list, but the last next pointer is NULL. */
2300                 if (!first_flist) {
2301                         flist->file_pool = pool_create(NORMAL_EXTENT, 0,
2302                                                 out_of_memory, POOL_INTERN);
2303                         if (!flist->file_pool)
2304                                 out_of_memory(msg);
2305
2306                         flist->ndx_start = flist->flist_num = inc_recurse ? 1 : 0;
2307
2308                         first_flist = cur_flist = flist->prev = flist;
2309                 } else {
2310                         struct file_list *prev = first_flist->prev;
2311
2312                         flist->file_pool = first_flist->file_pool;
2313
2314                         flist->ndx_start = prev->ndx_start + prev->used + 1;
2315                         flist->flist_num = prev->flist_num + 1;
2316
2317                         flist->prev = prev;
2318                         prev->next = first_flist->prev = flist;
2319                 }
2320                 flist->pool_boundary = pool_boundary(flist->file_pool, 0);
2321                 flist_cnt++;
2322         }
2323
2324         return flist;
2325 }
2326
2327 /* Free up all elements in a flist. */
2328 void flist_free(struct file_list *flist)
2329 {
2330         if (!flist->prev) {
2331                 /* Was FLIST_TEMP dir-list. */
2332         } else if (flist == flist->prev) {
2333                 first_flist = cur_flist = NULL;
2334                 file_total = 0;
2335                 flist_cnt = 0;
2336         } else {
2337                 if (flist == cur_flist)
2338                         cur_flist = flist->next;
2339                 if (flist == first_flist)
2340                         first_flist = first_flist->next;
2341                 else {
2342                         flist->prev->next = flist->next;
2343                         if (!flist->next)
2344                                 flist->next = first_flist;
2345                 }
2346                 flist->next->prev = flist->prev;
2347                 file_total -= flist->used;
2348                 flist_cnt--;
2349         }
2350
2351         if (!flist->prev || !flist_cnt)
2352                 pool_destroy(flist->file_pool);
2353         else
2354                 pool_free_old(flist->file_pool, flist->pool_boundary);
2355
2356         if (flist->sorted && flist->sorted != flist->files)
2357                 free(flist->sorted);
2358         free(flist->files);
2359         free(flist);
2360 }
2361
2362 /* This routine ensures we don't have any duplicate names in our file list.
2363  * duplicate names can cause corruption because of the pipelining. */
2364 static void flist_sort_and_clean(struct file_list *flist, int strip_root)
2365 {
2366         char fbuf[MAXPATHLEN];
2367         int i, prev_i;
2368
2369         if (!flist)
2370                 return;
2371         if (flist->used == 0) {
2372                 flist->high = -1;
2373                 flist->low = 0;
2374                 return;
2375         }
2376
2377         fsort(flist->sorted, flist->used);
2378
2379         if (!am_sender || inc_recurse) {
2380                 for (i = prev_i = 0; i < flist->used; i++) {
2381                         if (F_IS_ACTIVE(flist->sorted[i])) {
2382                                 prev_i = i;
2383                                 break;
2384                         }
2385                 }
2386                 flist->low = prev_i;
2387         } else {
2388                 i = prev_i = flist->used - 1;
2389                 flist->low = 0;
2390         }
2391
2392         while (++i < flist->used) {
2393                 int j;
2394                 struct file_struct *file = flist->sorted[i];
2395
2396                 if (!F_IS_ACTIVE(file))
2397                         continue;
2398                 if (f_name_cmp(file, flist->sorted[prev_i]) == 0)
2399                         j = prev_i;
2400                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
2401                         int save_mode = file->mode;
2402                         /* Make sure that this directory doesn't duplicate a
2403                          * non-directory earlier in the list. */
2404                         flist->high = prev_i;
2405                         file->mode = S_IFREG;
2406                         j = flist_find(flist, file);
2407                         file->mode = save_mode;
2408                 } else
2409                         j = -1;
2410                 if (j >= 0) {
2411                         int keep, drop;
2412                         /* If one is a dir and the other is not, we want to
2413                          * keep the dir because it might have contents in the
2414                          * list.  Otherwise keep the first one. */
2415                         if (S_ISDIR(file->mode)) {
2416                                 struct file_struct *fp = flist->sorted[j];
2417                                 if (!S_ISDIR(fp->mode))
2418                                         keep = i, drop = j;
2419                                 else {
2420                                         if (am_sender)
2421                                                 file->flags |= FLAG_DUPLICATE;
2422                                         else { /* Make sure we merge our vital flags. */
2423                                                 fp->flags |= file->flags & (FLAG_TOP_DIR|FLAG_CONTENT_DIR);
2424                                                 fp->flags &= file->flags | ~FLAG_IMPLIED_DIR;
2425                                         }
2426                                         keep = j, drop = i;
2427                                 }
2428                         } else
2429                                 keep = j, drop = i;
2430
2431                         if (!am_sender) {
2432                                 if (verbose > 1) {
2433                                         rprintf(FINFO,
2434                                             "removing duplicate name %s from file list (%d)\n",
2435                                             f_name(file, fbuf), drop + flist->ndx_start);
2436                                 }
2437                                 clear_file(flist->sorted[drop]);
2438                         }
2439
2440                         if (keep == i) {
2441                                 if (flist->low == drop) {
2442                                         for (j = drop + 1;
2443                                              j < i && !F_IS_ACTIVE(flist->sorted[j]);
2444                                              j++) {}
2445                                         flist->low = j;
2446                                 }
2447                                 prev_i = i;
2448                         }
2449                 } else
2450                         prev_i = i;
2451         }
2452         flist->high = prev_i;
2453
2454         if (strip_root) {
2455                 /* We need to strip off the leading slashes for relative
2456                  * paths, but this must be done _after_ the sorting phase. */
2457                 for (i = flist->low; i <= flist->high; i++) {
2458                         struct file_struct *file = flist->sorted[i];
2459
2460                         if (!file->dirname)
2461                                 continue;
2462                         while (*file->dirname == '/')
2463                                 file->dirname++;
2464                         if (!*file->dirname)
2465                                 file->dirname = NULL;
2466                 }
2467         }
2468
2469         if (prune_empty_dirs && !am_sender) {
2470                 int j, prev_depth = 0;
2471
2472                 prev_i = 0; /* It's OK that this isn't really true. */
2473
2474                 for (i = flist->low; i <= flist->high; i++) {
2475                         struct file_struct *fp, *file = flist->sorted[i];
2476
2477                         /* This temporarily abuses the F_DEPTH() value for a
2478                          * directory that is in a chain that might get pruned.
2479                          * We restore the old value if it gets a reprieve. */
2480                         if (S_ISDIR(file->mode) && F_DEPTH(file)) {
2481                                 /* Dump empty dirs when coming back down. */
2482                                 for (j = prev_depth; j >= F_DEPTH(file); j--) {
2483                                         fp = flist->sorted[prev_i];
2484                                         if (F_DEPTH(fp) >= 0)
2485                                                 break;
2486                                         prev_i = -F_DEPTH(fp)-1;
2487                                         clear_file(fp);
2488                                 }
2489                                 prev_depth = F_DEPTH(file);
2490                                 if (is_excluded(f_name(file, fbuf), 1,
2491                                                        ALL_FILTERS)) {
2492                                         /* Keep dirs through this dir. */
2493                                         for (j = prev_depth-1; ; j--) {
2494                                                 fp = flist->sorted[prev_i];
2495                                                 if (F_DEPTH(fp) >= 0)
2496                                                         break;
2497                                                 prev_i = -F_DEPTH(fp)-1;
2498                                                 F_DEPTH(fp) = j;
2499                                         }
2500                                 } else
2501                                         F_DEPTH(file) = -prev_i-1;
2502                                 prev_i = i;
2503                         } else {
2504                                 /* Keep dirs through this non-dir. */
2505                                 for (j = prev_depth; ; j--) {
2506                                         fp = flist->sorted[prev_i];
2507                                         if (F_DEPTH(fp) >= 0)
2508                                                 break;
2509                                         prev_i = -F_DEPTH(fp)-1;
2510                                         F_DEPTH(fp) = j;
2511                                 }
2512                         }
2513                 }
2514                 /* Dump all remaining empty dirs. */
2515                 while (1) {
2516                         struct file_struct *fp = flist->sorted[prev_i];
2517                         if (F_DEPTH(fp) >= 0)
2518                                 break;
2519                         prev_i = -F_DEPTH(fp)-1;
2520                         clear_file(fp);
2521                 }
2522
2523                 for (i = flist->low; i <= flist->high; i++) {
2524                         if (F_IS_ACTIVE(flist->sorted[i]))
2525                                 break;
2526                 }
2527                 flist->low = i;
2528                 for (i = flist->high; i >= flist->low; i--) {
2529                         if (F_IS_ACTIVE(flist->sorted[i]))
2530                                 break;
2531                 }
2532                 flist->high = i;
2533         }
2534 }
2535
2536 static void output_flist(struct file_list *flist)
2537 {
2538         char uidbuf[16], gidbuf[16], depthbuf[16];
2539         struct file_struct *file;
2540         const char *root, *dir, *slash, *name, *trail;
2541         const char *who = who_am_i();
2542         int i;
2543
2544         rprintf(FINFO, "[%s] flist start=%d, used=%d, low=%d, high=%d\n",
2545                 who, flist->ndx_start, flist->used, flist->low, flist->high);
2546         for (i = 0; i < flist->used; i++) {
2547                 file = flist->files[i];
2548                 if ((am_root || am_sender) && uid_ndx) {
2549                         snprintf(uidbuf, sizeof uidbuf, " uid=%u",
2550                                  F_OWNER(file));
2551                 } else
2552                         *uidbuf = '\0';
2553                 if (gid_ndx) {
2554                         static char parens[] = "(\0)\0\0\0";
2555                         char *pp = parens + (file->flags & FLAG_SKIP_GROUP ? 0 : 3);
2556                         snprintf(gidbuf, sizeof gidbuf, " gid=%s%u%s",
2557                                  pp, F_GROUP(file), pp + 2);
2558                 } else
2559                         *gidbuf = '\0';
2560                 if (!am_sender)
2561                         snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file));
2562                 if (F_IS_ACTIVE(file)) {
2563                         root = am_sender ? NS(F_PATHNAME(file)) : depthbuf;
2564                         if ((dir = file->dirname) == NULL)
2565                                 dir = slash = "";
2566                         else
2567                                 slash = "/";
2568                         name = file->basename;
2569                         trail = S_ISDIR(file->mode) ? "/" : "";
2570                 } else
2571                         root = dir = slash = name = trail = "";
2572                 rprintf(FINFO,
2573                         "[%s] i=%d %s %s%s%s%s mode=0%o len=%.0f%s%s flags=%x\n",
2574                         who, i + flist->ndx_start,
2575                         root, dir, slash, name, trail,
2576                         (int)file->mode, (double)F_LENGTH(file),
2577                         uidbuf, gidbuf, file->flags);
2578         }
2579 }
2580
2581 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
2582 enum fnc_type { t_PATH, t_ITEM };
2583
2584 static int found_prefix;
2585
2586 /* Compare the names of two file_struct entities, similar to how strcmp()
2587  * would do if it were operating on the joined strings.
2588  *
2589  * Some differences beginning with protocol_version 29: (1) directory names
2590  * are compared with an assumed trailing slash so that they compare in a
2591  * way that would cause them to sort immediately prior to any content they
2592  * may have; (2) a directory of any name compares after a non-directory of
2593  * any name at the same depth; (3) a directory with name "." compares prior
2594  * to anything else.  These changes mean that a directory and a non-dir
2595  * with the same name will not compare as equal (protocol_version >= 29).
2596  *
2597  * The dirname component can be an empty string, but the basename component
2598  * cannot (and never is in the current codebase).  The basename component
2599  * may be NULL (for a removed item), in which case it is considered to be
2600  * after any existing item. */
2601 int f_name_cmp(const struct file_struct *f1, const struct file_struct *f2)
2602 {
2603         int dif;
2604         const uchar *c1, *c2;
2605         enum fnc_state state1, state2;
2606         enum fnc_type type1, type2;
2607         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
2608
2609         if (!f1 || !F_IS_ACTIVE(f1)) {
2610                 if (!f2 || !F_IS_ACTIVE(f2))
2611                         return 0;
2612                 return -1;
2613         }
2614         if (!f2 || !F_IS_ACTIVE(f2))
2615                 return 1;
2616
2617         c1 = (uchar*)f1->dirname;
2618         c2 = (uchar*)f2->dirname;
2619         if (c1 == c2)
2620                 c1 = c2 = NULL;
2621         if (!c1) {
2622                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2623                 c1 = (const uchar*)f1->basename;
2624                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2625                         type1 = t_ITEM;
2626                         state1 = s_TRAILING;
2627                         c1 = (uchar*)"";
2628                 } else
2629                         state1 = s_BASE;
2630         } else {
2631                 type1 = t_path;
2632                 state1 = s_DIR;
2633         }
2634         if (!c2) {
2635                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2636                 c2 = (const uchar*)f2->basename;
2637                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2638                         type2 = t_ITEM;
2639                         state2 = s_TRAILING;
2640                         c2 = (uchar*)"";
2641                 } else
2642                         state2 = s_BASE;
2643         } else {
2644                 type2 = t_path;
2645                 state2 = s_DIR;
2646         }
2647
2648         if (type1 != type2)
2649                 return type1 == t_PATH ? 1 : -1;
2650
2651         do {
2652                 if (!*c1) {
2653                         switch (state1) {
2654                         case s_DIR:
2655                                 state1 = s_SLASH;
2656                                 c1 = (uchar*)"/";
2657                                 break;
2658                         case s_SLASH:
2659                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2660                                 c1 = (const uchar*)f1->basename;
2661                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2662                                         type1 = t_ITEM;
2663                                         state1 = s_TRAILING;
2664                                         c1 = (uchar*)"";
2665                                 } else
2666                                         state1 = s_BASE;
2667                                 break;
2668                         case s_BASE:
2669                                 state1 = s_TRAILING;
2670                                 if (type1 == t_PATH) {
2671                                         c1 = (uchar*)"/";
2672                                         break;
2673                                 }
2674                                 /* FALL THROUGH */
2675                         case s_TRAILING:
2676                                 type1 = t_ITEM;
2677                                 break;
2678                         }
2679                         if (*c2 && type1 != type2)
2680                                 return type1 == t_PATH ? 1 : -1;
2681                 }
2682                 if (!*c2) {
2683                         switch (state2) {
2684                         case s_DIR:
2685                                 state2 = s_SLASH;
2686                                 c2 = (uchar*)"/";
2687                                 break;
2688                         case s_SLASH:
2689                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2690                                 c2 = (const uchar*)f2->basename;
2691                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2692                                         type2 = t_ITEM;
2693                                         state2 = s_TRAILING;
2694                                         c2 = (uchar*)"";
2695                                 } else
2696                                         state2 = s_BASE;
2697                                 break;
2698                         case s_BASE:
2699                                 state2 = s_TRAILING;
2700                                 if (type2 == t_PATH) {
2701                                         c2 = (uchar*)"/";
2702                                         break;
2703                                 }
2704                                 /* FALL THROUGH */
2705                         case s_TRAILING:
2706                                 found_prefix = 1;
2707                                 if (!*c1)
2708                                         return 0;
2709                                 type2 = t_ITEM;
2710                                 break;
2711                         }
2712                         if (type1 != type2)
2713                                 return type1 == t_PATH ? 1 : -1;
2714                 }
2715         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
2716
2717         return dif;
2718 }
2719
2720 /* Returns 1 if f1's filename has all of f2's filename as a prefix.  This does
2721  * not match if f2's basename is not an exact match of a path element in f1.
2722  * E.g. /path/foo is not a prefix of /path/foobar/baz, but /path/foobar is. */
2723 int f_name_has_prefix(const struct file_struct *f1, const struct file_struct *f2)
2724 {
2725         found_prefix = 0;
2726         f_name_cmp(f1, f2);
2727         return found_prefix;
2728 }
2729
2730 char *f_name_buf(void)
2731 {
2732         static char names[5][MAXPATHLEN];
2733         static unsigned int n;
2734
2735         n = (n + 1) % (sizeof names / sizeof names[0]);
2736
2737         return names[n];
2738 }
2739
2740 /* Return a copy of the full filename of a flist entry, using the indicated
2741  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
2742  * done because we checked the size when creating the file_struct entry.
2743  */
2744 char *f_name(const struct file_struct *f, char *fbuf)
2745 {
2746         if (!f || !F_IS_ACTIVE(f))
2747                 return NULL;
2748
2749         if (!fbuf)
2750                 fbuf = f_name_buf();
2751
2752         if (f->dirname) {
2753                 int len = strlen(f->dirname);
2754                 memcpy(fbuf, f->dirname, len);
2755                 fbuf[len] = '/';
2756                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
2757         } else
2758                 strlcpy(fbuf, f->basename, MAXPATHLEN);
2759
2760         return fbuf;
2761 }
2762
2763 /* Do a non-recursive scan of the named directory, possibly ignoring all
2764  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
2765  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
2766  * buffer (the functions we call will append names onto the end, but the old
2767  * dir value will be restored on exit). */
2768 struct file_list *get_dirlist(char *dirname, int dlen, int ignore_filter_rules)
2769 {
2770         struct file_list *dirlist;
2771         char dirbuf[MAXPATHLEN];
2772         int save_recurse = recurse;
2773         int save_xfer_dirs = xfer_dirs;
2774         int save_prune_empty_dirs = prune_empty_dirs;
2775
2776         if (dlen < 0) {
2777                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
2778                 if (dlen >= MAXPATHLEN)
2779                         return NULL;
2780                 dirname = dirbuf;
2781         }
2782
2783         dirlist = flist_new(FLIST_TEMP, "get_dirlist");
2784
2785         recurse = 0;
2786         xfer_dirs = 1;
2787         send_directory(ignore_filter_rules ? -2 : -1, dirlist, dirname, dlen, 0);
2788         xfer_dirs = save_xfer_dirs;
2789         recurse = save_recurse;
2790         if (do_progress)
2791                 flist_count_offset += dirlist->used;
2792
2793         prune_empty_dirs = 0;
2794         dirlist->sorted = dirlist->files;
2795         flist_sort_and_clean(dirlist, 0);
2796         prune_empty_dirs = save_prune_empty_dirs;
2797
2798         if (verbose > 3)
2799                 output_flist(dirlist);
2800
2801         return dirlist;
2802 }