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 "rounding.h"
  25 #include "io.h"
  26
  27 extern int verbose;
  28 extern int list_only;
  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 struct stats stats;
  67 extern char *filesfrom_host;
  68
  69 extern char curr_dir[MAXPATHLEN];
  70
  71 extern struct chmod_mode_struct *chmod_modes;
  72
  73 extern struct filter_list_struct filter_list;
  74 extern struct filter_list_struct server_filter_list;
  75
  76 #ifdef ICONV_OPTION
  77 extern int ic_ndx;
  78 extern int need_unsorted_flist;
  79 extern iconv_t ic_send, ic_recv;
  80 #endif
  81
  82 #define PTR_SIZE (sizeof (struct file_struct *))
  83
  84 int io_error;
  85 int checksum_len;
  86 dev_t filesystem_dev; /* used to implement -x */
  87
  88 struct file_list *cur_flist, *first_flist, *dir_flist;
  89 int send_dir_ndx = -1, send_dir_depth = 0;
  90 int flist_cnt = 0; /* how many (non-tmp) file list objects exist */
  91 int file_total = 0; /* total of all active items over all file-lists */
  92 int flist_eof = 0; /* all the file-lists are now known */
  93
  94 /* Starting from protocol version 26, we always use 64-bit ino_t and dev_t
  95  * internally, even if this platform does not allow files to have 64-bit inums.
  96  * The only exception is if we're on a platform with no 64-bit type at all.
  97  *
  98  * Because we use read_longint() to get these off the wire, if you transfer
  99  * devices or (for protocols < 30) hardlinks with dev or inum > 2**32 to a
 100  * machine with no 64-bit types then you will get an overflow error.
 101  *
 102  * Note that if you transfer devices from a 64-bit-devt machine (say, Solaris)
 103  * to a 32-bit-devt machine (say, Linux-2.2/x86) then the device numbers will
 104  * be truncated.  But it's a kind of silly thing to do anyhow. */
 105
 106 /* The tmp_* vars are used as a cache area by make_file() to store data
 107  * that the sender doesn't need to remember in its file list.  The data
 108  * will survive just long enough to be used by send_file_entry(). */
 109 static dev_t tmp_rdev;
 110 #ifdef SUPPORT_HARD_LINKS
 111 static int64 tmp_dev, tmp_ino;
 112 #endif
 113 static char tmp_sum[MAX_DIGEST_LEN];
 114
 115 static char empty_sum[MAX_DIGEST_LEN];
 116 static int flist_count_offset; /* for --delete --progress */
 117 static int dir_count = 0;
 118
 119 static void clean_flist(struct file_list *flist, int strip_root);
 120 static void output_flist(struct file_list *flist);
 121
 122 void init_flist(void)
 123 {
 124         if (verbose > 4) {
 125                 rprintf(FINFO, "FILE_STRUCT_LEN=%d, EXTRA_LEN=%d\n",
 126                         (int)FILE_STRUCT_LEN, (int)EXTRA_LEN);
 127         }
 128         checksum_len = protocol_version < 21 ? 2
 129                      : protocol_version < 30 ? MD4_DIGEST_LEN
 130                      : MD5_DIGEST_LEN;
 131 }
 132
 133 static int show_filelist_p(void)
 134 {
 135         return verbose && xfer_dirs && !am_server && !inc_recurse;
 136 }
 137
 138 static void start_filelist_progress(char *kind)
 139 {
 140         rprintf(FCLIENT, "%s ... ", kind);
 141         if (verbose > 1 || do_progress)
 142                 rprintf(FCLIENT, "\n");
 143         rflush(FINFO);
 144 }
 145
 146 static void emit_filelist_progress(int count)
 147 {
 148         rprintf(FCLIENT, " %d files...\r", count);
 149 }
 150
 151 static void maybe_emit_filelist_progress(int count)
 152 {
 153         if (do_progress && show_filelist_p() && (count % 100) == 0)
 154                 emit_filelist_progress(count);
 155 }
 156
 157 static void finish_filelist_progress(const struct file_list *flist)
 158 {
 159         if (do_progress) {
 160                 /* This overwrites the progress line */
 161                 rprintf(FINFO, "%d file%sto consider\n",
 162                         flist->used, flist->used == 1 ? " " : "s ");
 163         } else
 164                 rprintf(FINFO, "done\n");
 165 }
 166
 167 void show_flist_stats(void)
 168 {
 169         /* Nothing yet */
 170 }
 171
 172 static void list_file_entry(struct file_struct *f)
 173 {
 174         char permbuf[PERMSTRING_SIZE];
 175         double len;
 176
 177         if (!F_IS_ACTIVE(f)) {
 178                 /* this can happen if duplicate names were removed */
 179                 return;
 180         }
 181
 182         permstring(permbuf, f->mode);
 183         len = F_LENGTH(f);
 184
 185         /* TODO: indicate '+' if the entry has an ACL. */
 186
 187 #ifdef SUPPORT_LINKS
 188         if (preserve_links && S_ISLNK(f->mode)) {
 189                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
 190                         permbuf, len, timestring(f->modtime),
 191                         f_name(f, NULL), F_SYMLINK(f));
 192         } else
 193 #endif
 194         {
 195                 rprintf(FINFO, "%s %11.0f %s %s\n",
 196                         permbuf, len, timestring(f->modtime),
 197                         f_name(f, NULL));
 198         }
 199 }
 200
 201 /* Stat either a symlink or its referent, depending on the settings of
 202  * copy_links, copy_unsafe_links, etc.  Returns -1 on error, 0 on success.
 203  *
 204  * If path is the name of a symlink, then the linkbuf buffer (which must hold
 205  * MAXPATHLEN chars) will be set to the symlink's target string.
 206  *
 207  * The stat structure pointed to by stp will contain information about the
 208  * link or the referent as appropriate, if they exist. */
 209 static int readlink_stat(const char *path, STRUCT_STAT *stp, char *linkbuf)
 210 {
 211 #ifdef SUPPORT_LINKS
 212         if (link_stat(path, stp, copy_dirlinks) < 0)
 213                 return -1;
 214         if (S_ISLNK(stp->st_mode)) {
 215                 int llen = readlink(path, linkbuf, MAXPATHLEN - 1);
 216                 if (llen < 0)
 217                         return -1;
 218                 linkbuf[llen] = '\0';
 219                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 220                         if (verbose > 1) {
 221                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 222                                         path, linkbuf);
 223                         }
 224                         return x_stat(path, stp, NULL);
 225                 }
 226         }
 227         return 0;
 228 #else
 229         return x_stat(path, stp, NULL);
 230 #endif
 231 }
 232
 233 int link_stat(const char *path, STRUCT_STAT *stp, int follow_dirlinks)
 234 {
 235 #ifdef SUPPORT_LINKS
 236         if (copy_links)
 237                 return x_stat(path, stp, NULL);
 238         if (x_lstat(path, stp, NULL) < 0)
 239                 return -1;
 240         if (follow_dirlinks && S_ISLNK(stp->st_mode)) {
 241                 STRUCT_STAT st;
 242                 if (x_stat(path, &st, NULL) == 0 && S_ISDIR(st.st_mode))
 243                         *stp = st;
 244         }
 245         return 0;
 246 #else
 247         return x_stat(path, stp, NULL);
 248 #endif
 249 }
 250
 251 /* This function is used to check if a file should be included/excluded
 252  * from the list of files based on its name and type etc.  The value of
 253  * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
 254 static int is_excluded(char *fname, int is_dir, int filter_level)
 255 {
 256 #if 0 /* This currently never happens, so avoid a useless compare. */
 257         if (filter_level == NO_FILTERS)
 258                 return 0;
 259 #endif
 260         if (fname) {
 261                 /* never exclude '.', even if somebody does --exclude '*' */
 262                 if (fname[0] == '.' && !fname[1])
 263                         return 0;
 264                 /* Handle the -R version of the '.' dir. */
 265                 if (fname[0] == '/') {
 266                         int len = strlen(fname);
 267                         if (fname[len-1] == '.' && fname[len-2] == '/')
 268                                 return 0;
 269                 }
 270         }
 271         if (server_filter_list.head
 272             && check_filter(&server_filter_list, fname, is_dir) < 0)
 273                 return 1;
 274         if (filter_level != ALL_FILTERS)
 275                 return 0;
 276         if (filter_list.head
 277             && check_filter(&filter_list, fname, is_dir) < 0)
 278                 return 1;
 279         return 0;
 280 }
 281
 282 static void send_directory(int f, struct file_list *flist,
 283                            char *fbuf, int len, int flags);
 284
 285 static const char *pathname, *orig_dir;
 286 static int pathname_len;
 287
 288
 289 /* Make sure flist can hold at least flist->used + extra entries. */
 290 static void flist_expand(struct file_list *flist, int extra)
 291 {
 292         struct file_struct **new_ptr;
 293
 294         if (flist->used + extra <= flist->malloced)
 295                 return;
 296
 297         if (flist->malloced < FLIST_START)
 298                 flist->malloced = FLIST_START;
 299         else if (flist->malloced >= FLIST_LINEAR)
 300                 flist->malloced += FLIST_LINEAR;
 301         else
 302                 flist->malloced *= 2;
 303
 304         /* In case count jumped or we are starting the list
 305          * with a known size just set it. */
 306         if (flist->malloced < flist->used + extra)
 307                 flist->malloced = flist->used + extra;
 308
 309         new_ptr = realloc_array(flist->files, struct file_struct *,
 310                                 flist->malloced);
 311
 312         if (verbose >= 2 && flist->malloced != FLIST_START) {
 313                 rprintf(FCLIENT, "[%s] expand file_list pointer array to %.0f bytes, did%s move\n",
 314                     who_am_i(),
 315                     (double)sizeof flist->files[0] * flist->malloced,
 316                     (new_ptr == flist->files) ? " not" : "");
 317         }
 318
 319         flist->files = new_ptr;
 320
 321         if (!flist->files)
 322                 out_of_memory("flist_expand");
 323 }
 324
 325 static void flist_done_allocating(struct file_list *flist)
 326 {
 327         void *ptr = pool_boundary(flist->file_pool, 8*1024);
 328         if (flist->pool_boundary == ptr)
 329                 flist->pool_boundary = NULL; /* list didn't use any pool memory */
 330         else
 331                 flist->pool_boundary = ptr;
 332 }
 333
 334 int push_pathname(const char *dir, int len)
 335 {
 336         if (dir == pathname)
 337                 return 1;
 338
 339         if (!orig_dir)
 340                 orig_dir = strdup(curr_dir);
 341
 342         if (pathname && !pop_dir(orig_dir)) {
 343                 rsyserr(FERROR, errno, "pop_dir %s failed",
 344                         full_fname(orig_dir));
 345                 exit_cleanup(RERR_FILESELECT);
 346         }
 347
 348         if (dir && !push_dir(dir, 0)) {
 349                 io_error |= IOERR_GENERAL;
 350                 rsyserr(FERROR, errno, "push_dir %s failed in %s",
 351                         full_fname(dir), curr_dir);
 352                 return 0;
 353         }
 354
 355         pathname = dir;
 356         pathname_len = len >= 0 ? len : dir ? (int)strlen(dir) : 0;
 357
 358         return 1;
 359 }
 360
 361 static void send_file_entry(int f, struct file_struct *file, int ndx, int first_ndx)
 362 {
 363         static time_t modtime;
 364         static mode_t mode;
 365         static int64 dev;
 366         static dev_t rdev;
 367         static uint32 rdev_major;
 368         static uid_t uid;
 369         static gid_t gid;
 370         static char *user_name, *group_name;
 371         static char lastname[MAXPATHLEN];
 372         char fname[MAXPATHLEN];
 373         int first_hlink_ndx = -1;
 374         int l1, l2;
 375         int xflags;
 376
 377 #ifdef ICONV_OPTION
 378         if (ic_send != (iconv_t)-1) {
 379                 ICONV_CONST char *ibuf;
 380                 char *obuf = fname;
 381                 size_t ocnt = MAXPATHLEN, icnt;
 382
 383                 iconv(ic_send, NULL,0, NULL,0);
 384                 if ((ibuf = (ICONV_CONST char *)file->dirname) != NULL) {
 385                     icnt = strlen(ibuf);
 386                     ocnt--; /* pre-subtract the space for the '/' */
 387                     if (iconv(ic_send, &ibuf,&icnt, &obuf,&ocnt) == (size_t)-1)
 388                         goto convert_error;
 389                     *obuf++ = '/';
 390                 }
 391
 392                 ibuf = (ICONV_CONST char *)file->basename;
 393                 icnt = strlen(ibuf);
 394                 if (iconv(ic_send, &ibuf,&icnt, &obuf,&ocnt) == (size_t)-1) {
 395                   convert_error:
 396                         io_error |= IOERR_GENERAL;
 397                         rprintf(FINFO,
 398                             "[%s] cannot convert filename: %s (%s)\n",
 399                             who_am_i(), f_name(file, fname), strerror(errno));
 400                         return;
 401                 }
 402                 *obuf = '\0';
 403         } else
 404 #endif
 405                 f_name(file, fname);
 406
 407         xflags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */
 408
 409         if (file->mode == mode)
 410                 xflags |= XMIT_SAME_MODE;
 411         else
 412                 mode = file->mode;
 413
 414         if (protocol_version >= 30 && S_ISDIR(mode) && !(file->flags & FLAG_XFER_DIR))
 415                 xflags |= XMIT_NON_XFER_DIR;
 416
 417         if ((preserve_devices && IS_DEVICE(mode))
 418          || (preserve_specials && IS_SPECIAL(mode))) {
 419                 if (protocol_version < 28) {
 420                         if (tmp_rdev == rdev)
 421                                 xflags |= XMIT_SAME_RDEV_pre28;
 422                         else
 423                                 rdev = tmp_rdev;
 424                 } else {
 425                         rdev = tmp_rdev;
 426                         if ((uint32)major(rdev) == rdev_major)
 427                                 xflags |= XMIT_SAME_RDEV_MAJOR;
 428                         else
 429                                 rdev_major = major(rdev);
 430                         if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu)
 431                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
 432                 }
 433         } else if (protocol_version < 28)
 434                 rdev = MAKEDEV(0, 0);
 435         if (uid_ndx) {
 436                 if ((uid_t)F_OWNER(file) == uid && *lastname)
 437                         xflags |= XMIT_SAME_UID;
 438                 else {
 439                         uid = F_OWNER(file);
 440                         if (uid_ndx && !numeric_ids) {
 441                                 user_name = add_uid(uid);
 442                                 if (inc_recurse && user_name)
 443                                         xflags |= XMIT_USER_NAME_FOLLOWS;
 444                         }
 445                 }
 446         }
 447         if (gid_ndx) {
 448                 if ((gid_t)F_GROUP(file) == gid && *lastname)
 449                         xflags |= XMIT_SAME_GID;
 450                 else {
 451                         gid = F_GROUP(file);
 452                         if (gid_ndx && !numeric_ids) {
 453                                 group_name = add_gid(gid);
 454                                 if (inc_recurse && group_name)
 455                                         xflags |= XMIT_GROUP_NAME_FOLLOWS;
 456                         }
 457                 }
 458         }
 459         if (file->modtime == modtime)
 460                 xflags |= XMIT_SAME_TIME;
 461         else
 462                 modtime = file->modtime;
 463
 464 #ifdef SUPPORT_HARD_LINKS
 465         if (tmp_dev != 0) {
 466                 if (protocol_version >= 30) {
 467                         struct ht_int64_node *np = idev_find(tmp_dev, tmp_ino);
 468                         first_hlink_ndx = (int32)(long)np->data - 1;
 469                         if (first_hlink_ndx < 0) {
 470                                 np->data = (void*)(long)(ndx + first_ndx + 1);
 471                                 xflags |= XMIT_HLINK_FIRST;
 472                         }
 473                         xflags |= XMIT_HLINKED;
 474                 } else {
 475                         if (tmp_dev == dev) {
 476                                 if (protocol_version >= 28)
 477                                         xflags |= XMIT_SAME_DEV_pre30;
 478                         } else
 479                                 dev = tmp_dev;
 480                         xflags |= XMIT_HLINKED;
 481                 }
 482         }
 483 #endif
 484
 485         for (l1 = 0;
 486             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 487             l1++) {}
 488         l2 = strlen(fname+l1);
 489
 490         if (l1 > 0)
 491                 xflags |= XMIT_SAME_NAME;
 492         if (l2 > 255)
 493                 xflags |= XMIT_LONG_NAME;
 494
 495         /* We must make sure we don't send a zero flag byte or the
 496          * other end will terminate the flist transfer.  Note that
 497          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 498          * it's harmless way to add a bit to the first flag byte. */
 499         if (protocol_version >= 28) {
 500                 if (!xflags && !S_ISDIR(mode))
 501                         xflags |= XMIT_TOP_DIR;
 502                 if ((xflags & 0xFF00) || !xflags) {
 503                         xflags |= XMIT_EXTENDED_FLAGS;
 504                         write_shortint(f, xflags);
 505                 } else
 506                         write_byte(f, xflags);
 507         } else {
 508                 if (!(xflags & 0xFF))
 509                         xflags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
 510                 write_byte(f, xflags);
 511         }
 512         if (xflags & XMIT_SAME_NAME)
 513                 write_byte(f, l1);
 514         if (xflags & XMIT_LONG_NAME)
 515                 write_varint30(f, l2);
 516         else
 517                 write_byte(f, l2);
 518         write_buf(f, fname + l1, l2);
 519
 520         if (first_hlink_ndx >= 0) {
 521                 write_varint(f, first_hlink_ndx);
 522                 if (first_hlink_ndx >= first_ndx)
 523                         goto the_end;
 524         }
 525
 526         write_varlong30(f, F_LENGTH(file), 3);
 527         if (!(xflags & XMIT_SAME_TIME)) {
 528                 if (protocol_version >= 30)
 529                         write_varlong(f, modtime, 4);
 530                 else
 531                         write_int(f, modtime);
 532         }
 533         if (!(xflags & XMIT_SAME_MODE))
 534                 write_int(f, to_wire_mode(mode));
 535         if (uid_ndx && !(xflags & XMIT_SAME_UID)) {
 536                 if (protocol_version < 30)
 537                         write_int(f, uid);
 538                 else {
 539                         write_varint(f, uid);
 540                         if (xflags & XMIT_USER_NAME_FOLLOWS) {
 541                                 int len = strlen(user_name);
 542                                 write_byte(f, len);
 543                                 write_buf(f, user_name, len);
 544                         }
 545                 }
 546         }
 547         if (gid_ndx && !(xflags & XMIT_SAME_GID)) {
 548                 if (protocol_version < 30)
 549                         write_int(f, gid);
 550                 else {
 551                         write_varint(f, gid);
 552                         if (xflags & XMIT_GROUP_NAME_FOLLOWS) {
 553                                 int len = strlen(group_name);
 554                                 write_byte(f, len);
 555                                 write_buf(f, group_name, len);
 556                         }
 557                 }
 558         }
 559         if ((preserve_devices && IS_DEVICE(mode))
 560          || (preserve_specials && IS_SPECIAL(mode))) {
 561                 if (protocol_version < 28) {
 562                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 563                                 write_int(f, (int)rdev);
 564                 } else {
 565                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 566                                 write_varint30(f, major(rdev));
 567                         if (protocol_version >= 30)
 568                                 write_varint(f, minor(rdev));
 569                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 570                                 write_byte(f, minor(rdev));
 571                         else
 572                                 write_int(f, minor(rdev));
 573                 }
 574         }
 575
 576 #ifdef SUPPORT_LINKS
 577         if (preserve_links && S_ISLNK(mode)) {
 578                 const char *sl = F_SYMLINK(file);
 579                 int len = strlen(sl);
 580                 write_varint30(f, len);
 581                 write_buf(f, sl, len);
 582         }
 583 #endif
 584
 585 #ifdef SUPPORT_HARD_LINKS
 586         if (tmp_dev != 0 && protocol_version < 30) {
 587                 if (protocol_version < 26) {
 588                         /* 32-bit dev_t and ino_t */
 589                         write_int(f, (int32)dev);
 590                         write_int(f, (int32)tmp_ino);
 591                 } else {
 592                         /* 64-bit dev_t and ino_t */
 593                         if (!(xflags & XMIT_SAME_DEV_pre30))
 594                                 write_longint(f, dev);
 595                         write_longint(f, tmp_ino);
 596                 }
 597         }
 598 #endif
 599
 600         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 601                 const char *sum;
 602                 if (S_ISREG(mode))
 603                         sum = tmp_sum;
 604                 else {
 605                         /* Prior to 28, we sent a useless set of nulls. */
 606                         sum = empty_sum;
 607                 }
 608                 write_buf(f, sum, checksum_len);
 609         }
 610
 611   the_end:
 612         strlcpy(lastname, fname, MAXPATHLEN);
 613
 614         if (S_ISREG(mode) || S_ISLNK(mode))
 615                 stats.total_size += F_LENGTH(file);
 616 }
 617
 618 static struct file_struct *recv_file_entry(struct file_list *flist,
 619                                            int xflags, int f)
 620 {
 621         static int64 modtime;
 622         static mode_t mode;
 623         static int64 dev;
 624         static dev_t rdev;
 625         static uint32 rdev_major;
 626         static uid_t uid;
 627         static gid_t gid;
 628         static uint16 gid_flags;
 629         static char lastname[MAXPATHLEN], *lastdir;
 630         static int lastdir_depth, lastdir_len = -1;
 631         static unsigned int del_hier_name_len = 0;
 632         static int in_del_hier = 0;
 633         char thisname[MAXPATHLEN];
 634         unsigned int l1 = 0, l2 = 0;
 635         int alloc_len, basename_len, linkname_len;
 636         int extra_len = file_extra_cnt * EXTRA_LEN;
 637         int first_hlink_ndx = -1;
 638         OFF_T file_length;
 639         const char *basename;
 640         struct file_struct *file;
 641         alloc_pool_t *pool;
 642         char *bp;
 643
 644         if (xflags & XMIT_SAME_NAME)
 645                 l1 = read_byte(f);
 646
 647         if (xflags & XMIT_LONG_NAME)
 648                 l2 = read_varint30(f);
 649         else
 650                 l2 = read_byte(f);
 651
 652         if (l2 >= MAXPATHLEN - l1) {
 653                 rprintf(FERROR,
 654                         "overflow: xflags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
 655                         xflags, l1, l2, lastname, who_am_i());
 656                 overflow_exit("recv_file_entry");
 657         }
 658
 659         strlcpy(thisname, lastname, l1 + 1);
 660         read_sbuf(f, &thisname[l1], l2);
 661         thisname[l1 + l2] = 0;
 662
 663         /* Abuse basename_len for a moment... */
 664         basename_len = strlcpy(lastname, thisname, MAXPATHLEN);
 665
 666 #ifdef ICONV_OPTION
 667         if (ic_recv != (iconv_t)-1) {
 668                 char *obuf = thisname;
 669                 ICONV_CONST char *ibuf = (ICONV_CONST char *)lastname;
 670                 size_t ocnt = MAXPATHLEN, icnt = basename_len;
 671
 672                 if (icnt >= MAXPATHLEN) {
 673                         errno = E2BIG;
 674                         goto convert_error;
 675                 }
 676
 677                 iconv(ic_recv, NULL,0, NULL,0);
 678                 if (iconv(ic_recv, &ibuf,&icnt, &obuf,&ocnt) == (size_t)-1) {
 679                   convert_error:
 680                         io_error |= IOERR_GENERAL;
 681                         rprintf(FINFO,
 682                             "[%s] cannot convert filename: %s (%s)\n",
 683                             who_am_i(), lastname, strerror(errno));
 684                         obuf = thisname;
 685                 }
 686                 *obuf = '\0';
 687         }
 688 #endif
 689
 690         clean_fname(thisname, 0);
 691
 692         if (sanitize_paths)
 693                 sanitize_path(thisname, thisname, "", 0, NULL);
 694
 695         if ((basename = strrchr(thisname, '/')) != NULL) {
 696                 int len = basename++ - thisname;
 697                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
 698                         lastdir = new_array(char, len + 1);
 699                         memcpy(lastdir, thisname, len);
 700                         lastdir[len] = '\0';
 701                         lastdir_len = len;
 702                         lastdir_depth = count_dir_elements(lastdir);
 703                 }
 704         } else
 705                 basename = thisname;
 706         basename_len = strlen(basename) + 1; /* count the '\0' */
 707
 708 #ifdef SUPPORT_HARD_LINKS
 709         if (protocol_version >= 30
 710          && BITS_SETnUNSET(xflags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
 711                 first_hlink_ndx = read_varint(f);
 712                 if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->ndx_start + flist->used) {
 713                         rprintf(FERROR,
 714                                 "hard-link reference out of range: %d (%d)\n",
 715                                 first_hlink_ndx, flist->ndx_start + flist->used);
 716                         exit_cleanup(RERR_PROTOCOL);
 717                 }
 718                 if (first_hlink_ndx >= flist->ndx_start) {
 719                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 720                         file_length = F_LENGTH(first);
 721                         modtime = first->modtime;
 722                         mode = first->mode;
 723                         if (uid_ndx)
 724                                 uid = F_OWNER(first);
 725                         if (gid_ndx)
 726                                 gid = F_GROUP(first);
 727                         if ((preserve_devices && IS_DEVICE(mode))
 728                          || (preserve_specials && IS_SPECIAL(mode))) {
 729                                 uint32 *devp = F_RDEV_P(first);
 730                                 rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
 731                                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 732                         }
 733                         if (preserve_links && S_ISLNK(mode))
 734                                 linkname_len = strlen(F_SYMLINK(first)) + 1;
 735                         else
 736                                 linkname_len = 0;
 737                         goto create_object;
 738                 }
 739         }
 740 #endif
 741
 742         file_length = read_varlong30(f, 3);
 743         if (!(xflags & XMIT_SAME_TIME)) {
 744                 if (protocol_version >= 30) {
 745                         modtime = read_varlong(f, 4);
 746 #if SIZEOF_TIME_T < SIZEOF_INT64
 747                         if ((modtime > INT_MAX || modtime < INT_MIN) && !am_generator) {
 748                                 rprintf(FERROR,
 749                                     "Time value of %s truncated on receiver.\n",
 750                                     lastname);
 751                         }
 752 #endif
 753                 } else
 754                         modtime = read_int(f);
 755         }
 756         if (!(xflags & XMIT_SAME_MODE))
 757                 mode = from_wire_mode(read_int(f));
 758
 759         if (chmod_modes && !S_ISLNK(mode))
 760                 mode = tweak_mode(mode, chmod_modes);
 761
 762         if (uid_ndx && !(xflags & XMIT_SAME_UID)) {
 763                 if (protocol_version < 30)
 764                         uid = (uid_t)read_int(f);
 765                 else {
 766                         uid = (uid_t)read_varint(f);
 767                         if (xflags & XMIT_USER_NAME_FOLLOWS)
 768                                 uid = recv_user_name(f, uid);
 769                         else if (inc_recurse && am_root && !numeric_ids)
 770                                 uid = match_uid(uid);
 771                 }
 772         }
 773         if (gid_ndx && !(xflags & XMIT_SAME_GID)) {
 774                 if (protocol_version < 30)
 775                         gid = (gid_t)read_int(f);
 776                 else {
 777                         gid = (gid_t)read_varint(f);
 778                         gid_flags = 0;
 779                         if (xflags & XMIT_GROUP_NAME_FOLLOWS)
 780                                 gid = recv_group_name(f, gid, &gid_flags);
 781                         else if (inc_recurse && (!am_root || !numeric_ids))
 782                                 gid = match_gid(gid, &gid_flags);
 783                 }
 784         }
 785
 786         if ((preserve_devices && IS_DEVICE(mode))
 787          || (preserve_specials && IS_SPECIAL(mode))) {
 788                 if (protocol_version < 28) {
 789                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 790                                 rdev = (dev_t)read_int(f);
 791                 } else {
 792                         uint32 rdev_minor;
 793                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 794                                 rdev_major = read_varint30(f);
 795                         if (protocol_version >= 30)
 796                                 rdev_minor = read_varint(f);
 797                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 798                                 rdev_minor = read_byte(f);
 799                         else
 800                                 rdev_minor = read_int(f);
 801                         rdev = MAKEDEV(rdev_major, rdev_minor);
 802                 }
 803                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 804                 file_length = 0;
 805         } else if (protocol_version < 28)
 806                 rdev = MAKEDEV(0, 0);
 807
 808 #ifdef SUPPORT_LINKS
 809         if (preserve_links && S_ISLNK(mode)) {
 810                 linkname_len = read_varint30(f) + 1; /* count the '\0' */
 811                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 812                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 813                                 linkname_len - 1);
 814                         overflow_exit("recv_file_entry");
 815                 }
 816         }
 817         else
 818 #endif
 819                 linkname_len = 0;
 820
 821 #ifdef SUPPORT_HARD_LINKS
 822   create_object:
 823         if (preserve_hard_links) {
 824                 if (protocol_version < 28 && S_ISREG(mode))
 825                         xflags |= XMIT_HLINKED;
 826                 if (xflags & XMIT_HLINKED)
 827                         extra_len += (inc_recurse+1) * EXTRA_LEN;
 828         }
 829 #endif
 830
 831 #ifdef SUPPORT_ACLS
 832         /* We need one or two index int32s when we're preserving ACLs. */
 833         if (preserve_acls)
 834                 extra_len += (S_ISDIR(mode) ? 2 : 1) * EXTRA_LEN;
 835 #endif
 836
 837         if (always_checksum && S_ISREG(mode))
 838                 extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
 839
 840         if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
 841                 extra_len += EXTRA_LEN;
 842
 843 #if EXTRA_ROUNDING > 0
 844         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
 845                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
 846 #endif
 847
 848         if (inc_recurse && S_ISDIR(mode)) {
 849                 if (one_file_system) {
 850                         /* Room to save the dir's device for -x */
 851                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 852                 }
 853                 pool = dir_flist->file_pool;
 854         } else
 855                 pool = flist->file_pool;
 856
 857         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
 858                   + linkname_len;
 859         bp = pool_alloc(pool, alloc_len, "recv_file_entry");
 860
 861         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
 862         bp += extra_len;
 863         file = (struct file_struct *)bp;
 864         bp += FILE_STRUCT_LEN;
 865
 866         memcpy(bp, basename, basename_len);
 867         bp += basename_len + linkname_len; /* skip space for symlink too */
 868
 869 #ifdef SUPPORT_HARD_LINKS
 870         if (xflags & XMIT_HLINKED)
 871                 file->flags |= FLAG_HLINKED;
 872 #endif
 873         file->modtime = (time_t)modtime;
 874         file->len32 = (uint32)file_length;
 875         if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
 876                 file->flags |= FLAG_LENGTH64;
 877                 OPT_EXTRA(file, 0)->unum = (uint32)(file_length >> 32);
 878         }
 879         file->mode = mode;
 880         if (uid_ndx)
 881                 F_OWNER(file) = uid;
 882         if (gid_ndx) {
 883                 F_GROUP(file) = gid;
 884                 file->flags |= gid_flags;
 885         }
 886 #ifdef ICONV_OPTION
 887         if (ic_ndx)
 888                 F_NDX(file) = flist->used + flist->ndx_start;
 889 #endif
 890
 891         if (basename != thisname) {
 892                 file->dirname = lastdir;
 893                 F_DEPTH(file) = lastdir_depth + 1;
 894         } else
 895                 F_DEPTH(file) = 1;
 896
 897         if (S_ISDIR(mode)) {
 898                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
 899                         F_DEPTH(file)--;
 900                 if (xflags & XMIT_TOP_DIR) {
 901                         in_del_hier = recurse;
 902                         del_hier_name_len = F_DEPTH(file) == 0 ? 0 : l1 + l2;
 903                         if (relative_paths && del_hier_name_len > 2
 904                             && lastname[del_hier_name_len-1] == '.'
 905                             && lastname[del_hier_name_len-2] == '/')
 906                                 del_hier_name_len -= 2;
 907                         file->flags |= FLAG_TOP_DIR | FLAG_XFER_DIR;
 908                 } else if (protocol_version >= 30) {
 909                         if (!(xflags & XMIT_NON_XFER_DIR))
 910                                 file->flags |= FLAG_XFER_DIR;
 911                 } else if (in_del_hier) {
 912                         if (!relative_paths || !del_hier_name_len
 913                          || (l1 >= del_hier_name_len
 914                           && lastname[del_hier_name_len] == '/'))
 915                                 file->flags |= FLAG_XFER_DIR;
 916                         else
 917                                 in_del_hier = 0;
 918                 }
 919         }
 920
 921         if ((preserve_devices && IS_DEVICE(mode))
 922          || (preserve_specials && IS_SPECIAL(mode))) {
 923                 uint32 *devp = F_RDEV_P(file);
 924                 DEV_MAJOR(devp) = major(rdev);
 925                 DEV_MINOR(devp) = minor(rdev);
 926         }
 927
 928 #ifdef SUPPORT_LINKS
 929         if (linkname_len) {
 930                 bp = (char*)file->basename + basename_len;
 931                 if (first_hlink_ndx >= flist->ndx_start) {
 932                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 933                         memcpy(bp, F_SYMLINK(first), linkname_len);
 934                 } else
 935                         read_sbuf(f, bp, linkname_len - 1);
 936                 if (sanitize_paths)
 937                         sanitize_path(bp, bp, "", lastdir_depth, NULL);
 938         }
 939 #endif
 940
 941 #ifdef SUPPORT_HARD_LINKS
 942         if (preserve_hard_links && xflags & XMIT_HLINKED) {
 943                 if (protocol_version >= 30) {
 944                         F_HL_GNUM(file) = xflags & XMIT_HLINK_FIRST
 945                                         ? flist->ndx_start + flist->used
 946                                         : first_hlink_ndx;
 947                 } else {
 948                         static int32 cnt = 0;
 949                         struct ht_int64_node *np;
 950                         int64 ino;
 951                         int32 ndx;
 952                         if (protocol_version < 26) {
 953                                 dev = read_int(f);
 954                                 ino = read_int(f);
 955                         } else {
 956                                 if (!(xflags & XMIT_SAME_DEV_pre30))
 957                                         dev = read_longint(f);
 958                                 ino = read_longint(f);
 959                         }
 960                         np = idev_find(dev, ino);
 961                         ndx = (int32)(long)np->data - 1;
 962                         if (ndx < 0) {
 963                                 ndx = cnt++;
 964                                 np->data = (void*)(long)cnt;
 965                         }
 966                         F_HL_GNUM(file) = ndx;
 967                 }
 968         }
 969 #endif
 970
 971         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 972                 if (S_ISREG(mode))
 973                         bp = F_SUM(file);
 974                 else {
 975                         /* Prior to 28, we get a useless set of nulls. */
 976                         bp = tmp_sum;
 977                 }
 978                 if (first_hlink_ndx >= flist->ndx_start) {
 979                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 980                         memcpy(bp, F_SUM(first), checksum_len);
 981                 } else
 982                         read_buf(f, bp, checksum_len);
 983         }
 984
 985 #ifdef SUPPORT_ACLS
 986         if (preserve_acls && !S_ISLNK(mode))
 987                 receive_acl(file, f);
 988 #endif
 989 #ifdef SUPPORT_XATTRS
 990         if (preserve_xattrs)
 991                 receive_xattr(file, f );
 992 #endif
 993
 994         if (S_ISREG(mode) || S_ISLNK(mode))
 995                 stats.total_size += file_length;
 996
 997         return file;
 998 }
 999
1000 /* Create a file_struct for a named file by reading its stat() information
1001  * and performing extensive checks against global options.
1002  *
1003  * Returns a pointer to the new file struct, or NULL if there was an error
1004  * or this file should be excluded. */
1005 struct file_struct *make_file(const char *fname, struct file_list *flist,
1006                               STRUCT_STAT *stp, int flags, int filter_level)
1007 {
1008         static char *lastdir;
1009         static int lastdir_len = -1;
1010         struct file_struct *file;
1011         char thisname[MAXPATHLEN];
1012         char linkname[MAXPATHLEN];
1013         int alloc_len, basename_len, linkname_len;
1014         int extra_len = file_extra_cnt * EXTRA_LEN;
1015         const char *basename;
1016         alloc_pool_t *pool;
1017         STRUCT_STAT st;
1018         char *bp;
1019
1020         if (strlcpy(thisname, fname, sizeof thisname) >= sizeof thisname) {
1021                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
1022                 return NULL;
1023         }
1024         clean_fname(thisname, 0);
1025         if (sanitize_paths)
1026                 sanitize_path(thisname, thisname, "", 0, NULL);
1027
1028         if (stp && S_ISDIR(stp->st_mode)) {
1029                 st = *stp; /* Needed for "symlink/." with --relative. */
1030                 *linkname = '\0'; /* make IBM code checker happy */
1031         } else if (readlink_stat(thisname, &st, linkname) != 0) {
1032                 int save_errno = errno;
1033                 /* See if file is excluded before reporting an error. */
1034                 if (filter_level != NO_FILTERS
1035                  && (is_excluded(thisname, 0, filter_level)
1036                   || is_excluded(thisname, 1, filter_level))) {
1037                         if (ignore_perishable && save_errno != ENOENT)
1038                                 non_perishable_cnt++;
1039                         return NULL;
1040                 }
1041                 if (save_errno == ENOENT) {
1042 #ifdef SUPPORT_LINKS
1043                         /* Avoid "vanished" error if symlink points nowhere. */
1044                         if (copy_links && x_lstat(thisname, &st, NULL) == 0
1045                             && S_ISLNK(st.st_mode)) {
1046                                 io_error |= IOERR_GENERAL;
1047                                 rprintf(FERROR, "symlink has no referent: %s\n",
1048                                         full_fname(thisname));
1049                         } else
1050 #endif
1051                         {
1052                                 enum logcode c = am_daemon && protocol_version < 28
1053                                     ? FERROR : FINFO;
1054                                 io_error |= IOERR_VANISHED;
1055                                 rprintf(c, "file has vanished: %s\n",
1056                                         full_fname(thisname));
1057                         }
1058                 } else {
1059                         io_error |= IOERR_GENERAL;
1060                         rsyserr(FERROR, save_errno, "readlink %s failed",
1061                                 full_fname(thisname));
1062                 }
1063                 return NULL;
1064         }
1065
1066         /* backup.c calls us with filter_level set to NO_FILTERS. */
1067         if (filter_level == NO_FILTERS)
1068                 goto skip_filters;
1069
1070         if (S_ISDIR(st.st_mode)) {
1071                 if (!xfer_dirs) {
1072                         rprintf(FINFO, "skipping directory %s\n", thisname);
1073                         return NULL;
1074                 }
1075         } else
1076                 flags &= ~FLAG_XFER_DIR;
1077
1078         /* -x only affects directories because we need to avoid recursing
1079          * into a mount-point directory, not to avoid copying a symlinked
1080          * file if -L (or similar) was specified. */
1081         if (one_file_system && st.st_dev != filesystem_dev
1082          && S_ISDIR(st.st_mode)) {
1083                 if (one_file_system > 1) {
1084                         if (verbose > 2) {
1085                                 rprintf(FINFO, "skipping mount-point dir %s\n",
1086                                         thisname);
1087                         }
1088                         return NULL;
1089                 }
1090                 flags |= FLAG_MOUNT_DIR;
1091         }
1092
1093         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level)) {
1094                 if (ignore_perishable)
1095                         non_perishable_cnt++;
1096                 return NULL;
1097         }
1098
1099         if (lp_ignore_nonreadable(module_id)) {
1100 #ifdef SUPPORT_LINKS
1101                 if (!S_ISLNK(st.st_mode))
1102 #endif
1103                         if (access(thisname, R_OK) != 0)
1104                                 return NULL;
1105         }
1106
1107   skip_filters:
1108
1109         /* Only divert a directory in the main transfer. */
1110         if (flist) {
1111                 if (flist->prev && S_ISDIR(st.st_mode)
1112                  && flags & FLAG_DIVERT_DIRS) {
1113                         /* Room for parent/sibling/next-child info. */
1114                         extra_len += DIRNODE_EXTRA_CNT * EXTRA_LEN;
1115                         dir_count++;
1116                         pool = dir_flist->file_pool;
1117                 } else
1118                         pool = flist->file_pool;
1119         } else
1120                 pool = NULL;
1121
1122         if (verbose > 2) {
1123                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
1124                         who_am_i(), thisname, filter_level);
1125         }
1126
1127         if ((basename = strrchr(thisname, '/')) != NULL) {
1128                 int len = basename++ - thisname;
1129                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
1130                         lastdir = new_array(char, len + 1);
1131                         memcpy(lastdir, thisname, len);
1132                         lastdir[len] = '\0';
1133                         lastdir_len = len;
1134                 }
1135         } else
1136                 basename = thisname;
1137         basename_len = strlen(basename) + 1; /* count the '\0' */
1138
1139 #ifdef SUPPORT_LINKS
1140         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
1141 #else
1142         linkname_len = 0;
1143 #endif
1144
1145         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
1146                 extra_len += EXTRA_LEN;
1147
1148 #if EXTRA_ROUNDING > 0
1149         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
1150                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
1151 #endif
1152
1153         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
1154                   + linkname_len;
1155         if (pool)
1156                 bp = pool_alloc(pool, alloc_len, "make_file");
1157         else {
1158                 if (!(bp = new_array(char, alloc_len)))
1159                         out_of_memory("make_file");
1160         }
1161
1162         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
1163         bp += extra_len;
1164         file = (struct file_struct *)bp;
1165         bp += FILE_STRUCT_LEN;
1166
1167         memcpy(bp, basename, basename_len);
1168         bp += basename_len + linkname_len; /* skip space for symlink too */
1169
1170 #ifdef SUPPORT_HARD_LINKS
1171         if (preserve_hard_links && flist && flist->prev) {
1172                 if (protocol_version >= 28
1173                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
1174                  : S_ISREG(st.st_mode)) {
1175                         tmp_dev = st.st_dev;
1176                         tmp_ino = st.st_ino;
1177                 } else
1178                         tmp_dev = 0;
1179         }
1180 #endif
1181
1182 #ifdef HAVE_STRUCT_STAT_ST_RDEV
1183         if (IS_DEVICE(st.st_mode) || IS_SPECIAL(st.st_mode)) {
1184                 tmp_rdev = st.st_rdev;
1185                 st.st_size = 0;
1186         }
1187 #endif
1188
1189         file->flags = flags;
1190         file->modtime = st.st_mtime;
1191         file->len32 = (uint32)st.st_size;
1192         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
1193                 file->flags |= FLAG_LENGTH64;
1194                 OPT_EXTRA(file, 0)->unum = (uint32)(st.st_size >> 32);
1195         }
1196         file->mode = st.st_mode;
1197         if (uid_ndx)
1198                 F_OWNER(file) = st.st_uid;
1199         if (gid_ndx)
1200                 F_GROUP(file) = st.st_gid;
1201
1202         if (basename != thisname)
1203                 file->dirname = lastdir;
1204
1205 #ifdef SUPPORT_LINKS
1206         if (linkname_len) {
1207                 bp = (char*)file->basename + basename_len;
1208                 memcpy(bp, linkname, linkname_len);
1209         }
1210 #endif
1211
1212         if (always_checksum && am_sender && S_ISREG(st.st_mode))
1213                 file_checksum(thisname, tmp_sum, st.st_size);
1214
1215         F_PATHNAME(file) = pathname;
1216
1217         /* This code is only used by the receiver when it is building
1218          * a list of files for a delete pass. */
1219         if (keep_dirlinks && linkname_len && flist) {
1220                 STRUCT_STAT st2;
1221                 int save_mode = file->mode;
1222                 file->mode = S_IFDIR; /* Find a directory with our name. */
1223                 if (flist_find(dir_flist, file) >= 0
1224                  && x_stat(thisname, &st2, NULL) == 0 && S_ISDIR(st2.st_mode)) {
1225                         file->modtime = st2.st_mtime;
1226                         file->len32 = 0;
1227                         file->mode = st2.st_mode;
1228                         if (uid_ndx)
1229                                 F_OWNER(file) = st2.st_uid;
1230                         if (gid_ndx)
1231                                 F_GROUP(file) = st2.st_gid;
1232                 } else
1233                         file->mode = save_mode;
1234         }
1235
1236         if (basename_len == 0+1)
1237                 return NULL;
1238
1239 #ifdef ICONV_OPTION
1240         if (ic_ndx)
1241                 F_NDX(file) = dir_count - 1;
1242 #endif
1243
1244         return file;
1245 }
1246
1247 /* Only called for temporary file_struct entries created by make_file(). */
1248 void unmake_file(struct file_struct *file)
1249 {
1250         int extra_cnt = file_extra_cnt + LEN64_BUMP(file);
1251 #if EXTRA_ROUNDING > 0
1252         if (extra_cnt & EXTRA_ROUNDING)
1253                 extra_cnt = (extra_cnt | EXTRA_ROUNDING) + 1;
1254 #endif
1255         free(REQ_EXTRA(file, extra_cnt));
1256 }
1257
1258 static struct file_struct *send_file_name(int f, struct file_list *flist,
1259                                           char *fname, STRUCT_STAT *stp,
1260                                           int flags, int filter_level)
1261 {
1262         struct file_struct *file;
1263 #if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
1264         statx sx;
1265 #endif
1266
1267         file = make_file(fname, flist, stp, flags, filter_level);
1268         if (!file)
1269                 return NULL;
1270
1271         if (chmod_modes && !S_ISLNK(file->mode))
1272                 file->mode = tweak_mode(file->mode, chmod_modes);
1273
1274 #ifdef SUPPORT_ACLS
1275         if (preserve_acls && !S_ISLNK(file->mode) && f >= 0) {
1276                 sx.st.st_mode = file->mode;
1277                 sx.acc_acl = sx.def_acl = NULL;
1278                 if (get_acl(fname, &sx) < 0)
1279                         return NULL;
1280         }
1281 #endif
1282 #ifdef SUPPORT_XATTRS
1283         if (preserve_xattrs && f >= 0) {
1284                 sx.xattr = NULL;
1285                 if (get_xattr(fname, &sx) < 0)
1286                         return NULL;
1287         }
1288 #endif
1289
1290         maybe_emit_filelist_progress(flist->used + flist_count_offset);
1291
1292         flist_expand(flist, 1);
1293         flist->files[flist->used++] = file;
1294         if (f >= 0) {
1295                 send_file_entry(f, file, flist->used - 1, flist->ndx_start);
1296 #ifdef SUPPORT_ACLS
1297                 if (preserve_acls && !S_ISLNK(file->mode)) {
1298                         send_acl(&sx, f);
1299                         free_acl(&sx);
1300                 }
1301 #endif
1302 #ifdef SUPPORT_XATTRS
1303                 if (preserve_xattrs) {
1304                         F_XATTR(file) = send_xattr(&sx, f);
1305                         free_xattr(&sx);
1306                 }
1307 #endif
1308         }
1309         return file;
1310 }
1311
1312 static void send_if_directory(int f, struct file_list *flist,
1313                               struct file_struct *file,
1314                               char *fbuf, unsigned int ol,
1315                               int flags)
1316 {
1317         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1318
1319         if (S_ISDIR(file->mode)
1320             && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) {
1321                 void *save_filters;
1322                 unsigned int len = strlen(fbuf);
1323                 if (len > 1 && fbuf[len-1] == '/')
1324                         fbuf[--len] = '\0';
1325                 if (len >= MAXPATHLEN - 1) {
1326                         io_error |= IOERR_GENERAL;
1327                         rprintf(FERROR, "skipping long-named directory: %s\n",
1328                                 full_fname(fbuf));
1329                         return;
1330                 }
1331                 save_filters = push_local_filters(fbuf, len);
1332                 send_directory(f, flist, fbuf, len, flags);
1333                 pop_local_filters(save_filters);
1334                 fbuf[ol] = '\0';
1335                 if (is_dot_dir)
1336                         fbuf[ol-1] = '.';
1337         }
1338 }
1339
1340 static int file_compare(const void *file1, const void *file2)
1341 {
1342         return f_name_cmp(*(struct file_struct **)file1,
1343                           *(struct file_struct **)file2);
1344 }
1345
1346 /* The guts of a merge-sort algorithm.  This was derived from the glibc
1347  * version, but I (Wayne) changed the merge code to do less copying and
1348  * to require only half the amount of temporary memory. */
1349 static void fsort_tmp(struct file_struct **fp, size_t num,
1350                       struct file_struct **tmp)
1351 {
1352         struct file_struct **f1, **f2, **t;
1353         size_t n1, n2;
1354
1355         n1 = num / 2;
1356         n2 = num - n1;
1357         f1 = fp;
1358         f2 = fp + n1;
1359
1360         if (n1 > 1)
1361                 fsort_tmp(f1, n1, tmp);
1362         if (n2 > 1)
1363                 fsort_tmp(f2, n2, tmp);
1364
1365         while (f_name_cmp(*f1, *f2) <= 0) {
1366                 if (!--n1)
1367                         return;
1368                 f1++;
1369         }
1370
1371         t = tmp;
1372         memcpy(t, f1, n1 * PTR_SIZE);
1373
1374         *f1++ = *f2++, n2--;
1375
1376         while (n1 > 0 && n2 > 0) {
1377                 if (f_name_cmp(*t, *f2) <= 0)
1378                         *f1++ = *t++, n1--;
1379                 else
1380                         *f1++ = *f2++, n2--;
1381         }
1382
1383         if (n1 > 0)
1384                 memcpy(f1, t, n1 * PTR_SIZE);
1385 }
1386
1387 /* This file-struct sorting routine makes sure that any identical names in
1388  * the file list stay in the same order as they were in the original list.
1389  * This is particularly vital in inc_recurse mode where we expect a sort
1390  * on the flist to match the exact order of a sort on the dir_flist. */
1391 static void fsort(struct file_struct **fp, size_t num)
1392 {
1393         if (num <= 1)
1394                 return;
1395
1396         if (use_qsort)
1397                 qsort(fp, num, PTR_SIZE, file_compare);
1398         else {
1399                 struct file_struct **tmp = new_array(struct file_struct *,
1400                                                      (num+1) / 2);
1401                 fsort_tmp(fp, num, tmp);
1402                 free(tmp);
1403         }
1404 }
1405
1406 /* We take an entire set of sibling dirs from the sorted flist and link them
1407  * into the tree, setting the appropriate parent/child/sibling pointers. */
1408 static void add_dirs_to_tree(int parent_ndx, struct file_list *from_flist,
1409                              int dir_cnt)
1410 {
1411         int i;
1412         int32 *dp = NULL;
1413         int32 *parent_dp = parent_ndx < 0 ? NULL
1414                          : F_DIR_NODE_P(dir_flist->sorted[parent_ndx]);
1415
1416         flist_expand(dir_flist, dir_cnt);
1417         dir_flist->sorted = dir_flist->files;
1418
1419         for (i = 0; dir_cnt; i++) {
1420                 struct file_struct *file = from_flist->sorted[i];
1421
1422                 if (!S_ISDIR(file->mode))
1423                         continue;
1424
1425                 dir_flist->files[dir_flist->used++] = file;
1426                 dir_cnt--;
1427
1428                 if (!(file->flags & FLAG_XFER_DIR)
1429                  || file->flags & FLAG_MOUNT_DIR)
1430                         continue;
1431
1432                 if (dp)
1433                         DIR_NEXT_SIBLING(dp) = dir_flist->used - 1;
1434                 else if (parent_dp)
1435                         DIR_FIRST_CHILD(parent_dp) = dir_flist->used - 1;
1436                 else
1437                         send_dir_ndx = dir_flist->used - 1;
1438
1439                 dp = F_DIR_NODE_P(file);
1440                 DIR_PARENT(dp) = parent_ndx;
1441                 DIR_FIRST_CHILD(dp) = -1;
1442         }
1443         if (dp)
1444                 DIR_NEXT_SIBLING(dp) = -1;
1445 }
1446
1447 /* This function is normally called by the sender, but the receiving side also
1448  * calls it from get_dirlist() with f set to -1 so that we just construct the
1449  * file list in memory without sending it over the wire.  Also, get_dirlist()
1450  * might call this with f set to -2, which also indicates that local filter
1451  * rules should be ignored. */
1452 static void send_directory(int f, struct file_list *flist, char *fbuf, int len,
1453                            int flags)
1454 {
1455         struct dirent *di;
1456         unsigned remainder;
1457         char *p;
1458         DIR *d;
1459         int divert_dirs = (flags & FLAG_DIVERT_DIRS) != 0;
1460         int start = flist->used;
1461         int filter_level = f == -2 ? SERVER_FILTERS : ALL_FILTERS;
1462
1463         assert(flist != NULL);
1464
1465         if (!(d = opendir(fbuf))) {
1466                 io_error |= IOERR_GENERAL;
1467                 rsyserr(FERROR, errno, "opendir %s failed", full_fname(fbuf));
1468                 return;
1469         }
1470
1471         p = fbuf + len;
1472         if (len != 1 || *fbuf != '/')
1473                 *p++ = '/';
1474         *p = '\0';
1475         remainder = MAXPATHLEN - (p - fbuf);
1476
1477         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1478                 char *dname = d_name(di);
1479                 if (dname[0] == '.' && (dname[1] == '\0'
1480                     || (dname[1] == '.' && dname[2] == '\0')))
1481                         continue;
1482                 if (strlcpy(p, dname, remainder) >= remainder) {
1483                         io_error |= IOERR_GENERAL;
1484                         rprintf(FINFO,
1485                                 "cannot send long-named file %s\n",
1486                                 full_fname(fbuf));
1487                         continue;
1488                 }
1489                 if (dname[0] == '\0') {
1490                         io_error |= IOERR_GENERAL;
1491                         rprintf(FINFO,
1492                                 "cannot send file with empty name in %s\n",
1493                                 full_fname(fbuf));
1494                         continue;
1495                 }
1496
1497                 send_file_name(f, flist, fbuf, NULL, flags, filter_level);
1498         }
1499
1500         fbuf[len] = '\0';
1501
1502         if (errno) {
1503                 io_error |= IOERR_GENERAL;
1504                 rsyserr(FERROR, errno, "readdir(%s)", full_fname(fbuf));
1505         }
1506
1507         closedir(d);
1508
1509         if (f >= 0 && recurse && !divert_dirs) {
1510                 int i, end = flist->used - 1;
1511                 /* send_if_directory() bumps flist->used, so use "end". */
1512                 for (i = start; i <= end; i++)
1513                         send_if_directory(f, flist, flist->files[i], fbuf, len, flags);
1514         }
1515 }
1516
1517 static void send1extra(int f, struct file_struct *file, struct file_list *flist)
1518 {
1519         char fbuf[MAXPATHLEN];
1520         int dlen;
1521
1522         f_name(file, fbuf);
1523         dlen = strlen(fbuf);
1524
1525         if (F_PATHNAME(file) != pathname) {
1526                 if (!push_pathname(F_PATHNAME(file), -1))
1527                         exit_cleanup(RERR_FILESELECT);
1528         }
1529
1530         change_local_filter_dir(fbuf, dlen, send_dir_depth);
1531
1532         send_directory(f, flist, fbuf, dlen, FLAG_DIVERT_DIRS | FLAG_XFER_DIR);
1533 }
1534
1535 void send_extra_file_list(int f, int at_least)
1536 {
1537         struct file_list *flist;
1538         int64 start_write;
1539         int future_cnt, save_io_error = io_error;
1540
1541         if (flist_eof)
1542                 return;
1543
1544         /* Keep sending data until we have the requested number of
1545          * files in the upcoming file-lists. */
1546         if (cur_flist->next) {
1547                 flist = first_flist->prev; /* the newest flist */
1548                 future_cnt = flist->ndx_end - cur_flist->next->ndx_start + 1;
1549         } else
1550                 future_cnt = 0;
1551         while (future_cnt < at_least) {
1552                 struct file_struct *file = dir_flist->sorted[send_dir_ndx];
1553                 int dir_ndx, dstart = dir_count;
1554                 int32 *dp;
1555
1556                 flist = flist_new(0, "send_extra_file_list");
1557                 start_write = stats.total_written;
1558
1559 #ifdef ICONV_OPTION
1560                 if (ic_ndx)
1561                         dir_ndx = F_NDX(file);
1562                 else
1563 #endif
1564                         dir_ndx = send_dir_ndx;
1565                 write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
1566                 flist->parent_ndx = dir_ndx;
1567
1568                 send1extra(f, file, flist);
1569                 dp = F_DIR_NODE_P(file);
1570
1571                 /* If there are any duplicate directory names that follow, we
1572                  * send all the dirs together in one file-list.  The dir_flist
1573                  * tree links all the child subdirs onto the last dup dir. */
1574                 while ((dir_ndx = DIR_NEXT_SIBLING(dp)) >= 0
1575                     && dir_flist->sorted[dir_ndx]->flags & FLAG_DUPLICATE) {
1576                         send_dir_ndx = dir_ndx;
1577                         file = dir_flist->sorted[dir_ndx];
1578                         send1extra(f, file, flist);
1579                         dp = F_DIR_NODE_P(file);
1580                 }
1581
1582                 write_byte(f, 0);
1583
1584 #ifdef ICONV_OPTION
1585                 if (need_unsorted_flist) {
1586                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
1587                                 out_of_memory("send_extra_file_list");
1588                         memcpy(flist->sorted, flist->files,
1589                                flist->used * sizeof (struct file_struct*));
1590                 } else
1591 #endif
1592                         flist->sorted = flist->files;
1593
1594                 clean_flist(flist, 0);
1595
1596                 flist->ndx_end = flist->ndx_start + flist->used - 1
1597                                - (dir_count - dstart);
1598
1599                 add_dirs_to_tree(send_dir_ndx, flist, dir_count - dstart);
1600                 flist_done_allocating(flist);
1601
1602                 file_total += flist->used;
1603                 future_cnt += flist->used;
1604                 stats.flist_size += stats.total_written - start_write;
1605                 stats.num_files += flist->used;
1606                 if (verbose > 3)
1607                         output_flist(flist);
1608
1609                 if (DIR_FIRST_CHILD(dp) >= 0) {
1610                         send_dir_ndx = DIR_FIRST_CHILD(dp);
1611                         send_dir_depth++;
1612                 } else {
1613                         while (DIR_NEXT_SIBLING(dp) < 0) {
1614                                 if ((send_dir_ndx = DIR_PARENT(dp)) < 0) {
1615                                         write_ndx(f, NDX_FLIST_EOF);
1616                                         flist_eof = 1;
1617                                         change_local_filter_dir(NULL, 0, 0);
1618                                         goto finish;
1619                                 }
1620                                 send_dir_depth--;
1621                                 file = dir_flist->sorted[send_dir_ndx];
1622                                 dp = F_DIR_NODE_P(file);
1623                         }
1624                         send_dir_ndx = DIR_NEXT_SIBLING(dp);
1625                 }
1626         }
1627
1628   finish:
1629         if (io_error != save_io_error && !ignore_errors)
1630                 send_msg_int(MSG_IO_ERROR, io_error);
1631 }
1632
1633 struct file_list *send_file_list(int f, int argc, char *argv[])
1634 {
1635         static const char *lastdir;
1636         static int lastdir_len = -1;
1637         int len, dirlen;
1638         STRUCT_STAT st;
1639         char *p, *dir;
1640         char lastpath[MAXPATHLEN] = "";
1641         struct file_list *flist;
1642         struct timeval start_tv, end_tv;
1643         int64 start_write;
1644         int use_ff_fd = 0;
1645         int flags, disable_buffering;
1646         int reading_remotely = filesfrom_host != NULL;
1647         int rl_nulls = eol_nulls || reading_remotely;
1648
1649         rprintf(FLOG, "building file list\n");
1650         if (show_filelist_p())
1651                 start_filelist_progress("building file list");
1652         else if (inc_recurse && verbose && !am_server)
1653                 rprintf(FCLIENT, "sending incremental file list\n");
1654
1655         start_write = stats.total_written;
1656         gettimeofday(&start_tv, NULL);
1657
1658 #ifdef SUPPORT_HARD_LINKS
1659         if (preserve_hard_links && protocol_version >= 30 && !cur_flist)
1660                 init_hard_links();
1661 #endif
1662
1663         flist = cur_flist = flist_new(0, "send_file_list");
1664         if (inc_recurse) {
1665                 dir_flist = flist_new(FLIST_TEMP, "send_file_list");
1666                 flags = FLAG_DIVERT_DIRS | FLAG_XFER_DIR;
1667         } else {
1668                 dir_flist = cur_flist;
1669                 flags = FLAG_XFER_DIR;
1670         }
1671
1672         disable_buffering = io_start_buffering_out(f);
1673         if (filesfrom_fd >= 0) {
1674                 if (argv[0] && !push_dir(argv[0], 0)) {
1675                         rsyserr(FERROR, errno, "push_dir %s failed in %s",
1676                                 full_fname(argv[0]), curr_dir);
1677                         exit_cleanup(RERR_FILESELECT);
1678                 }
1679                 use_ff_fd = 1;
1680         }
1681
1682         while (1) {
1683                 char fbuf[MAXPATHLEN];
1684                 char *fn;
1685                 int is_dot_dir;
1686
1687                 if (use_ff_fd) {
1688                         if (read_line(filesfrom_fd, fbuf, sizeof fbuf, !reading_remotely, rl_nulls) == 0)
1689                                 break;
1690                         sanitize_path(fbuf, fbuf, "", 0, NULL);
1691                 } else {
1692                         if (argc-- == 0)
1693                                 break;
1694                         strlcpy(fbuf, *argv++, MAXPATHLEN);
1695                         if (sanitize_paths)
1696                                 sanitize_path(fbuf, fbuf, "", 0, NULL);
1697                 }
1698
1699                 len = strlen(fbuf);
1700                 if (relative_paths) {
1701                         /* We clean up fbuf below. */
1702                         is_dot_dir = 0;
1703                 } else if (!len || fbuf[len - 1] == '/') {
1704                         if (len == 2 && fbuf[0] == '.') {
1705                                 /* Turn "./" into just "." rather than "./." */
1706                                 fbuf[1] = '\0';
1707                         } else {
1708                                 if (len + 1 >= MAXPATHLEN)
1709                                         overflow_exit("send_file_list");
1710                                 fbuf[len++] = '.';
1711                                 fbuf[len] = '\0';
1712                         }
1713                         is_dot_dir = 1;
1714                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
1715                     && (len == 2 || fbuf[len-3] == '/')) {
1716                         if (len + 2 >= MAXPATHLEN)
1717                                 overflow_exit("send_file_list");
1718                         fbuf[len++] = '/';
1719                         fbuf[len++] = '.';
1720                         fbuf[len] = '\0';
1721                         is_dot_dir = 1;
1722                 } else {
1723                         is_dot_dir = fbuf[len-1] == '.'
1724                                    && (len == 1 || fbuf[len-2] == '/');
1725                 }
1726
1727                 dir = NULL;
1728
1729                 if (!relative_paths) {
1730                         p = strrchr(fbuf, '/');
1731                         if (p) {
1732                                 *p = '\0';
1733                                 if (p == fbuf)
1734                                         dir = "/";
1735                                 else
1736                                         dir = fbuf;
1737                                 len -= p - fbuf + 1;
1738                                 fn = p + 1;
1739                         } else
1740                                 fn = fbuf;
1741                 } else {
1742                         if ((p = strstr(fbuf, "/./")) != NULL) {
1743                                 *p = '\0';
1744                                 if (p == fbuf)
1745                                         dir = "/";
1746                                 else
1747                                         dir = fbuf;
1748                                 len -= p - fbuf + 3;
1749                                 fn = p + 3;
1750                         } else
1751                                 fn = fbuf;
1752                         /* Get rid of trailing "/" and "/.". */
1753                         while (len) {
1754                                 if (fn[len - 1] == '/') {
1755                                         is_dot_dir = 1;
1756                                         if (!--len && !dir) {
1757                                                 len++;
1758                                                 break;
1759                                         }
1760                                 }
1761                                 else if (len >= 2 && fn[len - 1] == '.'
1762                                                   && fn[len - 2] == '/') {
1763                                         is_dot_dir = 1;
1764                                         if (!(len -= 2) && !dir) {
1765                                                 len++;
1766                                                 break;
1767                                         }
1768                                 } else
1769                                         break;
1770                         }
1771                         if (len == 1 && fn[0] == '/')
1772                                 fn[len++] = '.';
1773                         fn[len] = '\0';
1774                         /* Reject a ".." dir in the active part of the path. */
1775                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
1776                                 if ((p[2] == '/' || p[2] == '\0')
1777                                  && (p == fn || p[-1] == '/')) {
1778                                         rprintf(FERROR,
1779                                             "found \"..\" dir in relative path: %s\n",
1780                                             fbuf);
1781                                         exit_cleanup(RERR_SYNTAX);
1782                                 }
1783                         }
1784                 }
1785
1786                 if (!*fn) {
1787                         len = 1;
1788                         fn = ".";
1789                 }
1790
1791                 dirlen = dir ? strlen(dir) : 0;
1792                 if (dirlen != lastdir_len || memcmp(lastdir, dir, dirlen) != 0) {
1793                         if (!push_pathname(dir ? strdup(dir) : NULL, dirlen))
1794                                 goto push_error;
1795                         lastdir = pathname;
1796                         lastdir_len = pathname_len;
1797                 } else if (!push_pathname(lastdir, lastdir_len)) {
1798                   push_error:
1799                         io_error |= IOERR_GENERAL;
1800                         rsyserr(FERROR, errno, "push_dir %s failed in %s",
1801                                 full_fname(dir), curr_dir);
1802                         continue;
1803                 }
1804
1805                 if (fn != fbuf)
1806                         memmove(fbuf, fn, len + 1);
1807
1808                 if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1809                         io_error |= IOERR_GENERAL;
1810                         rsyserr(FERROR, errno, "link_stat %s failed",
1811                                 full_fname(fbuf));
1812                         continue;
1813                 }
1814
1815                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
1816                         rprintf(FINFO, "skipping directory %s\n", fbuf);
1817                         continue;
1818                 }
1819
1820                 if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
1821                         /* Send the implied directories at the start of the
1822                          * source spec, so we get their permissions right. */
1823                         char *lp = lastpath, *slash = fbuf;
1824                         *p = '\0';
1825                         /* Skip any initial directories in our path that we
1826                          * have in common with lastpath. */
1827                         for (fn = fbuf; *fn && *lp == *fn; lp++, fn++) {
1828                                 if (*fn == '/')
1829                                         slash = fn;
1830                         }
1831                         *p = '/';
1832                         if (fn != p || (*lp && *lp != '/')) {
1833                                 int save_copy_links = copy_links;
1834                                 int save_xfer_dirs = xfer_dirs;
1835                                 int dir_flags = flags & ~FLAG_XFER_DIR;
1836                                 copy_links |= copy_unsafe_links;
1837                                 xfer_dirs = 1;
1838                                 while ((slash = strchr(slash+1, '/')) != 0) {
1839                                         *slash = '\0';
1840                                         send_file_name(f, flist, fbuf, NULL,
1841                                                        dir_flags, ALL_FILTERS);
1842                                         *slash = '/';
1843                                 }
1844                                 copy_links = save_copy_links;
1845                                 xfer_dirs = save_xfer_dirs;
1846                                 *p = '\0';
1847                                 strlcpy(lastpath, fbuf, sizeof lastpath);
1848                                 *p = '/';
1849                         }
1850                 }
1851
1852                 if (one_file_system)
1853                         filesystem_dev = st.st_dev;
1854
1855                 if (recurse || (xfer_dirs && is_dot_dir)) {
1856                         struct file_struct *file;
1857                         int top_flags = FLAG_TOP_DIR | flags;
1858                         file = send_file_name(f, flist, fbuf, &st,
1859                                               top_flags, ALL_FILTERS);
1860                         if (file && !inc_recurse)
1861                                 send_if_directory(f, flist, file, fbuf, len, flags);
1862                 } else
1863                         send_file_name(f, flist, fbuf, &st, flags, ALL_FILTERS);
1864         }
1865
1866         gettimeofday(&end_tv, NULL);
1867         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
1868                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
1869         if (stats.flist_buildtime == 0)
1870                 stats.flist_buildtime = 1;
1871         start_tv = end_tv;
1872
1873         write_byte(f, 0); /* Indicate end of file list */
1874
1875 #ifdef SUPPORT_HARD_LINKS
1876         if (preserve_hard_links && protocol_version >= 30 && !inc_recurse)
1877                 idev_destroy();
1878 #endif
1879
1880         if (show_filelist_p())
1881                 finish_filelist_progress(flist);
1882
1883         gettimeofday(&end_tv, NULL);
1884         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
1885                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
1886
1887         /* When converting names, both sides keep an unsorted file-list array
1888          * because the names will differ on the sending and receiving sides
1889          * (both sides will use the unsorted index number for each item). */
1890
1891         /* Sort the list without removing any duplicates.  This allows the
1892          * receiving side to ask for whatever name it kept.  For incremental
1893          * recursion mode, the sender marks duplicate dirs so that it can
1894          * send them together in a single file-list. */
1895 #ifdef ICONV_OPTION
1896         if (need_unsorted_flist) {
1897                 if (inc_recurse) {
1898                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
1899                                 out_of_memory("send_file_list");
1900                         memcpy(flist->sorted, flist->files,
1901                                flist->used * sizeof (struct file_struct*));
1902                         clean_flist(flist, 0);
1903                 } else {
1904                         flist->sorted = flist->files;
1905                         flist->low = 0;
1906                         flist->high = flist->used - 1;
1907                 }
1908         } else
1909 #endif
1910         {
1911                 flist->sorted = flist->files;
1912                 clean_flist(flist, 0);
1913         }
1914         file_total += flist->used;
1915
1916         /* We don't subtract dir_count for the first send since we
1917          * might have one or more dot dirs which need to get sent. */
1918         flist->ndx_end = flist->ndx_start + flist->used - 1;
1919
1920         if (!numeric_ids && !inc_recurse)
1921                 send_id_list(f);
1922
1923         /* send the io_error flag */
1924         if (protocol_version < 30)
1925                 write_int(f, ignore_errors ? 0 : io_error);
1926         else if (io_error && !ignore_errors)
1927                 send_msg_int(MSG_IO_ERROR, io_error);
1928
1929         if (disable_buffering)
1930                 io_end_buffering_out();
1931
1932         stats.flist_size = stats.total_written - start_write;
1933         stats.num_files = flist->used;
1934
1935         if (verbose > 3)
1936                 output_flist(flist);
1937
1938         if (verbose > 2)
1939                 rprintf(FINFO, "send_file_list done\n");
1940
1941         if (inc_recurse) {
1942                 add_dirs_to_tree(-1, flist, dir_count);
1943                 flist_done_allocating(flist);
1944                 if (send_dir_ndx < 0) {
1945                         write_ndx(f, NDX_FLIST_EOF);
1946                         flist_eof = 1;
1947                 }
1948                 else if (file_total == 1) {
1949                         /* If we're creating incremental file-lists and there
1950                          * was just 1 item in the first file-list, send 1 more
1951                          * file-list to check if this is a 1-file xfer. */
1952                         send_extra_file_list(f, 1);
1953                 }
1954         }
1955
1956         return flist;
1957 }
1958
1959 struct file_list *recv_file_list(int f)
1960 {
1961         struct file_list *flist;
1962         int dstart, flags;
1963         int64 start_read;
1964
1965         if (!first_flist)
1966                 rprintf(FLOG, "receiving file list\n");
1967         if (show_filelist_p())
1968                 start_filelist_progress("receiving file list");
1969         else if (inc_recurse && verbose && !am_server && !first_flist)
1970                 rprintf(FCLIENT, "receiving incremental file list\n");
1971
1972         start_read = stats.total_read;
1973
1974 #ifdef SUPPORT_HARD_LINKS
1975         if (preserve_hard_links && !first_flist)
1976                 init_hard_links();
1977 #endif
1978
1979         flist = flist_new(0, "recv_file_list");
1980
1981         if (inc_recurse) {
1982                 if (flist->ndx_start == 0)
1983                         dir_flist = flist_new(FLIST_TEMP, "recv_file_list");
1984                 dstart = dir_flist->used;
1985         } else {
1986                 dir_flist = flist;
1987                 dstart = 0;
1988         }
1989
1990         while ((flags = read_byte(f)) != 0) {
1991                 struct file_struct *file;
1992
1993                 flist_expand(flist, 1);
1994
1995                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
1996                         flags |= read_byte(f) << 8;
1997                 file = recv_file_entry(flist, flags, f);
1998
1999                 if (inc_recurse && S_ISDIR(file->mode)) {
2000                         flist_expand(dir_flist, 1);
2001                         dir_flist->files[dir_flist->used++] = file;
2002                 }
2003
2004                 flist->files[flist->used++] = file;
2005
2006                 maybe_emit_filelist_progress(flist->used);
2007
2008                 if (verbose > 2) {
2009                         rprintf(FINFO, "recv_file_name(%s)\n",
2010                                 f_name(file, NULL));
2011                 }
2012         }
2013         file_total += flist->used;
2014
2015         flist->ndx_end = flist->ndx_start + flist->used - 1;
2016         if (inc_recurse && flist->ndx_start)
2017                 flist->ndx_end -= dir_flist->used - dstart;
2018
2019         if (verbose > 2)
2020                 rprintf(FINFO, "received %d names\n", flist->used);
2021
2022         if (show_filelist_p())
2023                 finish_filelist_progress(flist);
2024
2025 #ifdef ICONV_OPTION
2026         if (need_unsorted_flist) {
2027                 /* Create an extra array of index pointers that we can sort for
2028                  * the generator's use (for wading through the files in sorted
2029                  * order and for calling flist_find()).  We keep the "files"
2030                  * list unsorted for our exchange of index numbers with the
2031                  * other side (since their names may not sort the same). */
2032                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2033                         out_of_memory("recv_file_list");
2034                 memcpy(flist->sorted, flist->files,
2035                        flist->used * sizeof (struct file_struct*));
2036                 if (inc_recurse && dir_flist->used > dstart) {
2037                         dir_flist->sorted = realloc_array(dir_flist->sorted,
2038                                                 struct file_struct *,
2039                                                 dir_flist->used);
2040                         memcpy(dir_flist->sorted + dstart, dir_flist->files + dstart,
2041                                (dir_flist->used - dstart) * sizeof (struct file_struct*));
2042                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2043                 }
2044         } else
2045 #endif
2046         {
2047                 flist->sorted = flist->files;
2048                 if (inc_recurse && dir_flist->used > dstart) {
2049                         dir_flist->sorted = dir_flist->files;
2050                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2051                 }
2052         }
2053
2054         if (inc_recurse)
2055                 flist_done_allocating(flist);
2056         else if (f >= 0)
2057                 recv_id_list(f, flist);
2058
2059         clean_flist(flist, relative_paths);
2060
2061         if (protocol_version < 30) {
2062                 /* Recv the io_error flag */
2063                 if (ignore_errors)
2064                         read_int(f);
2065                 else
2066                         io_error |= read_int(f);
2067         }
2068
2069         if (verbose > 3)
2070                 output_flist(flist);
2071
2072         if (list_only) {
2073                 int i;
2074                 for (i = flist->low; i <= flist->high; i++)
2075                         list_file_entry(flist->files[i]);
2076         }
2077
2078         if (verbose > 2)
2079                 rprintf(FINFO, "recv_file_list done\n");
2080
2081         stats.flist_size += stats.total_read - start_read;
2082         stats.num_files += flist->used;
2083
2084         return flist;
2085 }
2086
2087 /* This is only used once by the receiver if the very first file-list
2088  * has exactly one item in it. */
2089 void recv_additional_file_list(int f)
2090 {
2091         struct file_list *flist;
2092         int ndx = read_ndx(f);
2093         if (ndx == NDX_FLIST_EOF) {
2094                 flist_eof = 1;
2095                 change_local_filter_dir(NULL, 0, 0);
2096         } else {
2097                 ndx = NDX_FLIST_OFFSET - ndx;
2098                 if (ndx < 0 || ndx >= dir_flist->used) {
2099                         ndx = NDX_FLIST_OFFSET - ndx;
2100                         rprintf(FERROR,
2101                                 "[%s] Invalid dir index: %d (%d - %d)\n",
2102                                 who_am_i(), ndx, NDX_FLIST_OFFSET,
2103                                 NDX_FLIST_OFFSET - dir_flist->used + 1);
2104                         exit_cleanup(RERR_PROTOCOL);
2105                 }
2106                 if (verbose > 3) {
2107                         rprintf(FINFO, "[%s] receiving flist for dir %d\n",
2108                                 who_am_i(), ndx);
2109                 }
2110                 flist = recv_file_list(f);
2111                 flist->parent_ndx = ndx;
2112         }
2113 }
2114
2115 /* Search for an identically-named item in the file list.  Note that the
2116  * items must agree in their directory-ness, or no match is returned. */
2117 int flist_find(struct file_list *flist, struct file_struct *f)
2118 {
2119         int low = flist->low, high = flist->high;
2120         int diff, mid, mid_up;
2121
2122         while (low <= high) {
2123                 mid = (low + high) / 2;
2124                 if (F_IS_ACTIVE(flist->sorted[mid]))
2125                         mid_up = mid;
2126                 else {
2127                         /* Scan for the next non-empty entry using the cached
2128                          * distance values.  If the value isn't fully up-to-
2129                          * date, update it. */
2130                         mid_up = mid + F_DEPTH(flist->sorted[mid]);
2131                         if (!F_IS_ACTIVE(flist->sorted[mid_up])) {
2132                                 do {
2133                                     mid_up += F_DEPTH(flist->sorted[mid_up]);
2134                                 } while (!F_IS_ACTIVE(flist->sorted[mid_up]));
2135                                 F_DEPTH(flist->sorted[mid]) = mid_up - mid;
2136                         }
2137                         if (mid_up > high) {
2138                                 /* If there's nothing left above us, set high to
2139                                  * a non-empty entry below us and continue. */
2140                                 high = mid - (int)flist->sorted[mid]->len32;
2141                                 if (!F_IS_ACTIVE(flist->sorted[high])) {
2142                                         do {
2143                                             high -= (int)flist->sorted[high]->len32;
2144                                         } while (!F_IS_ACTIVE(flist->sorted[high]));
2145                                         flist->sorted[mid]->len32 = mid - high;
2146                                 }
2147                                 continue;
2148                         }
2149                 }
2150                 diff = f_name_cmp(flist->sorted[mid_up], f);
2151                 if (diff == 0) {
2152                         if (protocol_version < 29
2153                             && S_ISDIR(flist->sorted[mid_up]->mode)
2154                             != S_ISDIR(f->mode))
2155                                 return -1;
2156                         return mid_up;
2157                 }
2158                 if (diff < 0)
2159                         low = mid_up + 1;
2160                 else
2161                         high = mid - 1;
2162         }
2163         return -1;
2164 }
2165
2166 /*
2167  * Free up any resources a file_struct has allocated
2168  * and clear the file.
2169  */
2170 void clear_file(struct file_struct *file)
2171 {
2172         /* The +1 zeros out the first char of the basename. */
2173         memset(file, 0, FILE_STRUCT_LEN + 1);
2174         /* In an empty entry, F_DEPTH() is an offset to the next non-empty
2175          * entry.  Likewise for len32 in the opposite direction.  We assume
2176          * that we're alone for now since flist_find() will adjust the counts
2177          * it runs into that aren't up-to-date. */
2178         file->len32 = F_DEPTH(file) = 1;
2179 }
2180
2181 /* Allocate a new file list. */
2182 struct file_list *flist_new(int flags, char *msg)
2183 {
2184         struct file_list *flist;
2185
2186         flist = new0(struct file_list);
2187         if (!flist)
2188                 out_of_memory(msg);
2189
2190         if (flags & FLIST_TEMP) {
2191                 if (!(flist->file_pool = pool_create(SMALL_EXTENT, 0,
2192                                                 out_of_memory, POOL_INTERN)))
2193                         out_of_memory(msg);
2194         } else {
2195                 /* This is a doubly linked list with prev looping back to
2196                  * the end of the list, but the last next pointer is NULL. */
2197                 if (!first_flist) {
2198                         flist->file_pool = pool_create(NORMAL_EXTENT, 0,
2199                                                 out_of_memory, POOL_INTERN);
2200                         if (!flist->file_pool)
2201                                 out_of_memory(msg);
2202
2203                         first_flist = cur_flist = flist->prev = flist;
2204                 } else {
2205                         flist->file_pool = first_flist->file_pool;
2206
2207                         flist->ndx_start = first_flist->prev->ndx_end + 2;
2208
2209                         flist->prev = first_flist->prev;
2210                         flist->prev->next = first_flist->prev = flist;
2211                 }
2212                 flist->pool_boundary = pool_boundary(flist->file_pool, 0);
2213                 flist_cnt++;
2214         }
2215
2216         return flist;
2217 }
2218
2219 /* Free up all elements in a flist. */
2220 void flist_free(struct file_list *flist)
2221 {
2222         if (!flist->prev) {
2223                 /* Was FLIST_TEMP dir-list. */
2224         } else if (flist == flist->prev) {
2225                 first_flist = cur_flist = NULL;
2226                 file_total = 0;
2227                 flist_cnt = 0;
2228         } else {
2229                 if (flist == cur_flist)
2230                         cur_flist = flist->next;
2231                 if (flist == first_flist)
2232                         first_flist = first_flist->next;
2233                 else {
2234                         flist->prev->next = flist->next;
2235                         if (!flist->next)
2236                                 flist->next = first_flist;
2237                 }
2238                 flist->next->prev = flist->prev;
2239                 file_total -= flist->used;
2240                 flist_cnt--;
2241         }
2242
2243         if (!flist->prev || !flist_cnt)
2244                 pool_destroy(flist->file_pool);
2245         else
2246                 pool_free_old(flist->file_pool, flist->pool_boundary);
2247
2248         if (flist->sorted && flist->sorted != flist->files)
2249                 free(flist->sorted);
2250         free(flist->files);
2251         free(flist);
2252 }
2253
2254 /* This routine ensures we don't have any duplicate names in our file list.
2255  * duplicate names can cause corruption because of the pipelining. */
2256 static void clean_flist(struct file_list *flist, int strip_root)
2257 {
2258         char fbuf[MAXPATHLEN];
2259         int i, prev_i;
2260
2261         if (!flist)
2262                 return;
2263         if (flist->used == 0) {
2264                 flist->high = -1;
2265                 flist->low = 0;
2266                 return;
2267         }
2268
2269         fsort(flist->sorted, flist->used);
2270
2271         if (!am_sender || inc_recurse) {
2272                 for (i = prev_i = 0; i < flist->used; i++) {
2273                         if (F_IS_ACTIVE(flist->sorted[i])) {
2274                                 prev_i = i;
2275                                 break;
2276                         }
2277                 }
2278                 flist->low = prev_i;
2279         } else {
2280                 i = prev_i = flist->used - 1;
2281                 flist->low = 0;
2282         }
2283
2284         while (++i < flist->used) {
2285                 int j;
2286                 struct file_struct *file = flist->sorted[i];
2287
2288                 if (!F_IS_ACTIVE(file))
2289                         continue;
2290                 if (f_name_cmp(file, flist->sorted[prev_i]) == 0)
2291                         j = prev_i;
2292                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
2293                         int save_mode = file->mode;
2294                         /* Make sure that this directory doesn't duplicate a
2295                          * non-directory earlier in the list. */
2296                         flist->high = prev_i;
2297                         file->mode = S_IFREG;
2298                         j = flist_find(flist, file);
2299                         file->mode = save_mode;
2300                 } else
2301                         j = -1;
2302                 if (j >= 0) {
2303                         int keep, drop;
2304                         /* If one is a dir and the other is not, we want to
2305                          * keep the dir because it might have contents in the
2306                          * list. */
2307                         if (S_ISDIR(file->mode)) {
2308                                 struct file_struct *fp = flist->sorted[j];
2309                                 if (!S_ISDIR(fp->mode))
2310                                         keep = i, drop = j;
2311                                 else
2312                                         keep = j, drop = i;
2313                         } else
2314                                 keep = j, drop = i;
2315
2316                         if (am_sender)
2317                                 flist->sorted[drop]->flags |= FLAG_DUPLICATE;
2318                         else {
2319                                 if (verbose > 1) {
2320                                         rprintf(FINFO,
2321                                             "removing duplicate name %s from file list (%d)\n",
2322                                             f_name(file, fbuf), drop + flist->ndx_start);
2323                                 }
2324                                 /* Make sure we don't lose track of a user-specified
2325                                  * top directory. */
2326                                 flist->sorted[keep]->flags |= flist->sorted[drop]->flags
2327                                                            & (FLAG_TOP_DIR|FLAG_XFER_DIR);
2328
2329                                 clear_file(flist->sorted[drop]);
2330                         }
2331
2332                         if (keep == i) {
2333                                 if (flist->low == drop) {
2334                                         for (j = drop + 1;
2335                                              j < i && !F_IS_ACTIVE(flist->sorted[j]);
2336                                              j++) {}
2337                                         flist->low = j;
2338                                 }
2339                                 prev_i = i;
2340                         }
2341                 } else
2342                         prev_i = i;
2343         }
2344         flist->high = prev_i;
2345
2346         if (strip_root) {
2347                 /* We need to strip off the leading slashes for relative
2348                  * paths, but this must be done _after_ the sorting phase. */
2349                 for (i = flist->low; i <= flist->high; i++) {
2350                         struct file_struct *file = flist->sorted[i];
2351
2352                         if (!file->dirname)
2353                                 continue;
2354                         while (*file->dirname == '/')
2355                                 file->dirname++;
2356                         if (!*file->dirname)
2357                                 file->dirname = NULL;
2358                 }
2359         }
2360
2361         if (prune_empty_dirs && !am_sender) {
2362                 int j, prev_depth = 0;
2363
2364                 prev_i = 0; /* It's OK that this isn't really true. */
2365
2366                 for (i = flist->low; i <= flist->high; i++) {
2367                         struct file_struct *fp, *file = flist->sorted[i];
2368
2369                         /* This temporarily abuses the F_DEPTH() value for a
2370                          * directory that is in a chain that might get pruned.
2371                          * We restore the old value if it gets a reprieve. */
2372                         if (S_ISDIR(file->mode) && F_DEPTH(file)) {
2373                                 /* Dump empty dirs when coming back down. */
2374                                 for (j = prev_depth; j >= F_DEPTH(file); j--) {
2375                                         fp = flist->sorted[prev_i];
2376                                         if (F_DEPTH(fp) >= 0)
2377                                                 break;
2378                                         prev_i = -F_DEPTH(fp)-1;
2379                                         clear_file(fp);
2380                                 }
2381                                 prev_depth = F_DEPTH(file);
2382                                 if (is_excluded(f_name(file, fbuf), 1,
2383                                                        ALL_FILTERS)) {
2384                                         /* Keep dirs through this dir. */
2385                                         for (j = prev_depth-1; ; j--) {
2386                                                 fp = flist->sorted[prev_i];
2387                                                 if (F_DEPTH(fp) >= 0)
2388                                                         break;
2389                                                 prev_i = -F_DEPTH(fp)-1;
2390                                                 F_DEPTH(fp) = j;
2391                                         }
2392                                 } else
2393                                         F_DEPTH(file) = -prev_i-1;
2394                                 prev_i = i;
2395                         } else {
2396                                 /* Keep dirs through this non-dir. */
2397                                 for (j = prev_depth; ; j--) {
2398                                         fp = flist->sorted[prev_i];
2399                                         if (F_DEPTH(fp) >= 0)
2400                                                 break;
2401                                         prev_i = -F_DEPTH(fp)-1;
2402                                         F_DEPTH(fp) = j;
2403                                 }
2404                         }
2405                 }
2406                 /* Dump all remaining empty dirs. */
2407                 while (1) {
2408                         struct file_struct *fp = flist->sorted[prev_i];
2409                         if (F_DEPTH(fp) >= 0)
2410                                 break;
2411                         prev_i = -F_DEPTH(fp)-1;
2412                         clear_file(fp);
2413                 }
2414
2415                 for (i = flist->low; i <= flist->high; i++) {
2416                         if (F_IS_ACTIVE(flist->sorted[i]))
2417                                 break;
2418                 }
2419                 flist->low = i;
2420                 for (i = flist->high; i >= flist->low; i--) {
2421                         if (F_IS_ACTIVE(flist->sorted[i]))
2422                                 break;
2423                 }
2424                 flist->high = i;
2425         }
2426 }
2427
2428 static void output_flist(struct file_list *flist)
2429 {
2430         char uidbuf[16], gidbuf[16], depthbuf[16];
2431         struct file_struct *file;
2432         const char *root, *dir, *slash, *name, *trail;
2433         const char *who = who_am_i();
2434         int i;
2435
2436         rprintf(FINFO, "[%s] flist start=%d, end=%d, used=%d, low=%d, high=%d\n",
2437                 who, flist->ndx_start, flist->ndx_end, flist->used, flist->low, flist->high);
2438         for (i = 0; i < flist->used; i++) {
2439                 file = flist->sorted[i];
2440                 if ((am_root || am_sender) && uid_ndx) {
2441                         snprintf(uidbuf, sizeof uidbuf, " uid=%u",
2442                                  F_OWNER(file));
2443                 } else
2444                         *uidbuf = '\0';
2445                 if (gid_ndx) {
2446                         static char parens[] = "(\0)\0\0\0";
2447                         char *pp = parens + (file->flags & FLAG_SKIP_GROUP ? 0 : 3);
2448                         snprintf(gidbuf, sizeof gidbuf, " gid=%s%u%s",
2449                                  pp, F_GROUP(file), pp + 2);
2450                 } else
2451                         *gidbuf = '\0';
2452                 if (!am_sender)
2453                         snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file));
2454                 if (F_IS_ACTIVE(file)) {
2455                         root = am_sender ? NS(F_PATHNAME(file)) : depthbuf;
2456                         if ((dir = file->dirname) == NULL)
2457                                 dir = slash = "";
2458                         else
2459                                 slash = "/";
2460                         name = file->basename;
2461                         trail = S_ISDIR(file->mode) ? "/" : "";
2462                 } else
2463                         root = dir = slash = name = trail = "";
2464                 rprintf(FINFO,
2465                         "[%s] i=%d %s %s%s%s%s mode=0%o len=%.0f%s%s flags=%x\n",
2466                         who, i + flist->ndx_start,
2467                         root, dir, slash, name, trail,
2468                         (int)file->mode, (double)F_LENGTH(file),
2469                         uidbuf, gidbuf, file->flags);
2470         }
2471 }
2472
2473 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
2474 enum fnc_type { t_PATH, t_ITEM };
2475
2476 static int found_prefix;
2477
2478 /* Compare the names of two file_struct entities, similar to how strcmp()
2479  * would do if it were operating on the joined strings.
2480  *
2481  * Some differences beginning with protocol_version 29: (1) directory names
2482  * are compared with an assumed trailing slash so that they compare in a
2483  * way that would cause them to sort immediately prior to any content they
2484  * may have; (2) a directory of any name compares after a non-directory of
2485  * any name at the same depth; (3) a directory with name "." compares prior
2486  * to anything else.  These changes mean that a directory and a non-dir
2487  * with the same name will not compare as equal (protocol_version >= 29).
2488  *
2489  * The dirname component can be an empty string, but the basename component
2490  * cannot (and never is in the current codebase).  The basename component
2491  * may be NULL (for a removed item), in which case it is considered to be
2492  * after any existing item. */
2493 int f_name_cmp(const struct file_struct *f1, const struct file_struct *f2)
2494 {
2495         int dif;
2496         const uchar *c1, *c2;
2497         enum fnc_state state1, state2;
2498         enum fnc_type type1, type2;
2499         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
2500
2501         if (!f1 || !F_IS_ACTIVE(f1)) {
2502                 if (!f2 || !F_IS_ACTIVE(f2))
2503                         return 0;
2504                 return -1;
2505         }
2506         if (!f2 || !F_IS_ACTIVE(f2))
2507                 return 1;
2508
2509         c1 = (uchar*)f1->dirname;
2510         c2 = (uchar*)f2->dirname;
2511         if (c1 == c2)
2512                 c1 = c2 = NULL;
2513         if (!c1) {
2514                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2515                 c1 = (const uchar*)f1->basename;
2516                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2517                         type1 = t_ITEM;
2518                         state1 = s_TRAILING;
2519                         c1 = (uchar*)"";
2520                 } else
2521                         state1 = s_BASE;
2522         } else {
2523                 type1 = t_path;
2524                 state1 = s_DIR;
2525         }
2526         if (!c2) {
2527                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2528                 c2 = (const uchar*)f2->basename;
2529                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2530                         type2 = t_ITEM;
2531                         state2 = s_TRAILING;
2532                         c2 = (uchar*)"";
2533                 } else
2534                         state2 = s_BASE;
2535         } else {
2536                 type2 = t_path;
2537                 state2 = s_DIR;
2538         }
2539
2540         if (type1 != type2)
2541                 return type1 == t_PATH ? 1 : -1;
2542
2543         do {
2544                 if (!*c1) {
2545                         switch (state1) {
2546                         case s_DIR:
2547                                 state1 = s_SLASH;
2548                                 c1 = (uchar*)"/";
2549                                 break;
2550                         case s_SLASH:
2551                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2552                                 c1 = (const uchar*)f1->basename;
2553                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2554                                         type1 = t_ITEM;
2555                                         state1 = s_TRAILING;
2556                                         c1 = (uchar*)"";
2557                                 } else
2558                                         state1 = s_BASE;
2559                                 break;
2560                         case s_BASE:
2561                                 state1 = s_TRAILING;
2562                                 if (type1 == t_PATH) {
2563                                         c1 = (uchar*)"/";
2564                                         break;
2565                                 }
2566                                 /* FALL THROUGH */
2567                         case s_TRAILING:
2568                                 type1 = t_ITEM;
2569                                 break;
2570                         }
2571                         if (*c2 && type1 != type2)
2572                                 return type1 == t_PATH ? 1 : -1;
2573                 }
2574                 if (!*c2) {
2575                         switch (state2) {
2576                         case s_DIR:
2577                                 state2 = s_SLASH;
2578                                 c2 = (uchar*)"/";
2579                                 break;
2580                         case s_SLASH:
2581                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2582                                 c2 = (const uchar*)f2->basename;
2583                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2584                                         type2 = t_ITEM;
2585                                         state2 = s_TRAILING;
2586                                         c2 = (uchar*)"";
2587                                 } else
2588                                         state2 = s_BASE;
2589                                 break;
2590                         case s_BASE:
2591                                 state2 = s_TRAILING;
2592                                 if (type2 == t_PATH) {
2593                                         c2 = (uchar*)"/";
2594                                         break;
2595                                 }
2596                                 /* FALL THROUGH */
2597                         case s_TRAILING:
2598                                 found_prefix = 1;
2599                                 if (!*c1)
2600                                         return 0;
2601                                 type2 = t_ITEM;
2602                                 break;
2603                         }
2604                         if (type1 != type2)
2605                                 return type1 == t_PATH ? 1 : -1;
2606                 }
2607         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
2608
2609         return dif;
2610 }
2611
2612 /* Returns 1 if f1's filename has all of f2's filename as a prefix.  This does
2613  * not match if f2's basename is not an exact match of a path element in f1.
2614  * E.g. /path/foo is not a prefix of /path/foobar/baz, but /path/foobar is. */
2615 int f_name_has_prefix(const struct file_struct *f1, const struct file_struct *f2)
2616 {
2617         found_prefix = 0;
2618         f_name_cmp(f1, f2);
2619         return found_prefix;
2620 }
2621
2622 char *f_name_buf(void)
2623 {
2624         static char names[5][MAXPATHLEN];
2625         static unsigned int n;
2626
2627         n = (n + 1) % (sizeof names / sizeof names[0]);
2628
2629         return names[n];
2630 }
2631
2632 /* Return a copy of the full filename of a flist entry, using the indicated
2633  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
2634  * done because we checked the size when creating the file_struct entry.
2635  */
2636 char *f_name(const struct file_struct *f, char *fbuf)
2637 {
2638         if (!f || !F_IS_ACTIVE(f))
2639                 return NULL;
2640
2641         if (!fbuf)
2642                 fbuf = f_name_buf();
2643
2644         if (f->dirname) {
2645                 int len = strlen(f->dirname);
2646                 memcpy(fbuf, f->dirname, len);
2647                 fbuf[len] = '/';
2648                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
2649         } else
2650                 strlcpy(fbuf, f->basename, MAXPATHLEN);
2651
2652         return fbuf;
2653 }
2654
2655 /* Do a non-recursive scan of the named directory, possibly ignoring all
2656  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
2657  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
2658  * buffer (the functions we call will append names onto the end, but the old
2659  * dir value will be restored on exit). */
2660 struct file_list *get_dirlist(char *dirname, int dlen, int ignore_filter_rules)
2661 {
2662         struct file_list *dirlist;
2663         char dirbuf[MAXPATHLEN];
2664         int save_recurse = recurse;
2665         int save_xfer_dirs = xfer_dirs;
2666         int save_prune_empty_dirs = prune_empty_dirs;
2667
2668         if (dlen < 0) {
2669                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
2670                 if (dlen >= MAXPATHLEN)
2671                         return NULL;
2672                 dirname = dirbuf;
2673         }
2674
2675         dirlist = flist_new(FLIST_TEMP, "get_dirlist");
2676
2677         recurse = 0;
2678         xfer_dirs = 1;
2679         send_directory(ignore_filter_rules ? -2 : -1, dirlist, dirname, dlen, 0);
2680         xfer_dirs = save_xfer_dirs;
2681         recurse = save_recurse;
2682         if (do_progress)
2683                 flist_count_offset += dirlist->used;
2684
2685         prune_empty_dirs = 0;
2686         dirlist->sorted = dirlist->files;
2687         clean_flist(dirlist, 0);
2688         prune_empty_dirs = save_prune_empty_dirs;
2689
2690         if (verbose > 3)
2691                 output_flist(dirlist);
2692
2693         return dirlist;
2694 }