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 relative_paths;
  56 extern int implied_dirs;
  57 extern int file_extra_cnt;
  58 extern int ignore_perishable;
  59 extern int non_perishable_cnt;
  60 extern int prune_empty_dirs;
  61 extern int copy_links;
  62 extern int copy_unsafe_links;
  63 extern int protocol_version;
  64 extern int sanitize_paths;
  65 extern struct stats stats;
  66
  67 extern char curr_dir[MAXPATHLEN];
  68
  69 extern struct chmod_mode_struct *chmod_modes;
  70
  71 extern struct filter_list_struct filter_list;
  72 extern struct filter_list_struct server_filter_list;
  73
  74 #ifdef ICONV_OPTION
  75 extern int ic_ndx;
  76 extern int need_unsorted_flist;
  77 extern iconv_t ic_send, ic_recv;
  78 #endif
  79
  80 #define PTR_SIZE (sizeof (struct file_struct *))
  81
  82 int io_error;
  83 int checksum_len;
  84 dev_t filesystem_dev; /* used to implement -x */
  85
  86 struct file_list *cur_flist, *first_flist, *dir_flist;
  87 int send_dir_ndx = -1, send_dir_depth = 0;
  88 int flist_cnt = 0; /* how many (non-tmp) file list objects exist */
  89 int file_total = 0; /* total of all active items over all file-lists */
  90 int flist_eof = 0; /* all the file-lists are now known */
  91
  92 /* Starting from protocol version 26, we always use 64-bit ino_t and dev_t
  93  * internally, even if this platform does not allow files to have 64-bit inums.
  94  * The only exception is if we're on a platform with no 64-bit type at all.
  95  *
  96  * Because we use read_longint() to get these off the wire, if you transfer
  97  * devices or (for protocols < 30) hardlinks with dev or inum > 2**32 to a
  98  * machine with no 64-bit types then you will get an overflow error.
  99  *
 100  * Note that if you transfer devices from a 64-bit-devt machine (say, Solaris)
 101  * to a 32-bit-devt machine (say, Linux-2.2/x86) then the device numbers will
 102  * be truncated.  But it's a kind of silly thing to do anyhow. */
 103
 104 /* The tmp_* vars are used as a cache area by make_file() to store data
 105  * that the sender doesn't need to remember in its file list.  The data
 106  * will survive just long enough to be used by send_file_entry(). */
 107 static dev_t tmp_rdev;
 108 #ifdef SUPPORT_HARD_LINKS
 109 static int64 tmp_dev, tmp_ino;
 110 #endif
 111 static char tmp_sum[MAX_DIGEST_LEN];
 112
 113 static char empty_sum[MAX_DIGEST_LEN];
 114 static int flist_count_offset; /* for --delete --progress */
 115 static int dir_count = 0;
 116
 117 static void clean_flist(struct file_list *flist, int strip_root);
 118 static void output_flist(struct file_list *flist);
 119
 120 void init_flist(void)
 121 {
 122         if (verbose > 4) {
 123                 rprintf(FINFO, "FILE_STRUCT_LEN=%d, EXTRA_LEN=%d\n",
 124                         (int)FILE_STRUCT_LEN, (int)EXTRA_LEN);
 125         }
 126         checksum_len = protocol_version < 21 ? 2
 127                      : protocol_version < 30 ? MD4_DIGEST_LEN
 128                      : MD5_DIGEST_LEN;
 129 }
 130
 131 static int show_filelist_p(void)
 132 {
 133         return verbose && xfer_dirs && !am_server && !inc_recurse;
 134 }
 135
 136 static void start_filelist_progress(char *kind)
 137 {
 138         rprintf(FCLIENT, "%s ... ", kind);
 139         if (verbose > 1 || do_progress)
 140                 rprintf(FCLIENT, "\n");
 141         rflush(FINFO);
 142 }
 143
 144 static void emit_filelist_progress(int count)
 145 {
 146         rprintf(FCLIENT, " %d files...\r", count);
 147 }
 148
 149 static void maybe_emit_filelist_progress(int count)
 150 {
 151         if (do_progress && show_filelist_p() && (count % 100) == 0)
 152                 emit_filelist_progress(count);
 153 }
 154
 155 static void finish_filelist_progress(const struct file_list *flist)
 156 {
 157         if (do_progress) {
 158                 /* This overwrites the progress line */
 159                 rprintf(FINFO, "%d file%sto consider\n",
 160                         flist->used, flist->used == 1 ? " " : "s ");
 161         } else
 162                 rprintf(FINFO, "done\n");
 163 }
 164
 165 void show_flist_stats(void)
 166 {
 167         /* Nothing yet */
 168 }
 169
 170 static void list_file_entry(struct file_struct *f)
 171 {
 172         char permbuf[PERMSTRING_SIZE];
 173         double len;
 174
 175         if (!F_IS_ACTIVE(f)) {
 176                 /* this can happen if duplicate names were removed */
 177                 return;
 178         }
 179
 180         permstring(permbuf, f->mode);
 181         len = F_LENGTH(f);
 182
 183         /* TODO: indicate '+' if the entry has an ACL. */
 184
 185 #ifdef SUPPORT_LINKS
 186         if (preserve_links && S_ISLNK(f->mode)) {
 187                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
 188                         permbuf, len, timestring(f->modtime),
 189                         f_name(f, NULL), F_SYMLINK(f));
 190         } else
 191 #endif
 192         {
 193                 rprintf(FINFO, "%s %11.0f %s %s\n",
 194                         permbuf, len, timestring(f->modtime),
 195                         f_name(f, NULL));
 196         }
 197 }
 198
 199 /* Stat either a symlink or its referent, depending on the settings of
 200  * copy_links, copy_unsafe_links, etc.  Returns -1 on error, 0 on success.
 201  *
 202  * If path is the name of a symlink, then the linkbuf buffer (which must hold
 203  * MAXPATHLEN chars) will be set to the symlink's target string.
 204  *
 205  * The stat structure pointed to by stp will contain information about the
 206  * link or the referent as appropriate, if they exist. */
 207 static int readlink_stat(const char *path, STRUCT_STAT *stp, char *linkbuf)
 208 {
 209 #ifdef SUPPORT_LINKS
 210         if (link_stat(path, stp, copy_dirlinks) < 0)
 211                 return -1;
 212         if (S_ISLNK(stp->st_mode)) {
 213                 int llen = readlink(path, linkbuf, MAXPATHLEN - 1);
 214                 if (llen < 0)
 215                         return -1;
 216                 linkbuf[llen] = '\0';
 217                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 218                         if (verbose > 1) {
 219                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 220                                         path, linkbuf);
 221                         }
 222                         return x_stat(path, stp, NULL);
 223                 }
 224         }
 225         return 0;
 226 #else
 227         return x_stat(path, stp, NULL);
 228 #endif
 229 }
 230
 231 int link_stat(const char *path, STRUCT_STAT *stp, int follow_dirlinks)
 232 {
 233 #ifdef SUPPORT_LINKS
 234         if (copy_links)
 235                 return x_stat(path, stp, NULL);
 236         if (x_lstat(path, stp, NULL) < 0)
 237                 return -1;
 238         if (follow_dirlinks && S_ISLNK(stp->st_mode)) {
 239                 STRUCT_STAT st;
 240                 if (x_stat(path, &st, NULL) == 0 && S_ISDIR(st.st_mode))
 241                         *stp = st;
 242         }
 243         return 0;
 244 #else
 245         return x_stat(path, stp, NULL);
 246 #endif
 247 }
 248
 249 /* This function is used to check if a file should be included/excluded
 250  * from the list of files based on its name and type etc.  The value of
 251  * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
 252 static int is_excluded(char *fname, int is_dir, int filter_level)
 253 {
 254 #if 0 /* This currently never happens, so avoid a useless compare. */
 255         if (filter_level == NO_FILTERS)
 256                 return 0;
 257 #endif
 258         if (fname) {
 259                 /* never exclude '.', even if somebody does --exclude '*' */
 260                 if (fname[0] == '.' && !fname[1])
 261                         return 0;
 262                 /* Handle the -R version of the '.' dir. */
 263                 if (fname[0] == '/') {
 264                         int len = strlen(fname);
 265                         if (fname[len-1] == '.' && fname[len-2] == '/')
 266                                 return 0;
 267                 }
 268         }
 269         if (server_filter_list.head
 270             && check_filter(&server_filter_list, fname, is_dir) < 0)
 271                 return 1;
 272         if (filter_level != ALL_FILTERS)
 273                 return 0;
 274         if (filter_list.head
 275             && check_filter(&filter_list, fname, is_dir) < 0)
 276                 return 1;
 277         return 0;
 278 }
 279
 280 static void send_directory(int f, struct file_list *flist,
 281                            char *fbuf, int len, int flags);
 282
 283 static const char *pathname, *orig_dir;
 284 static int pathname_len;
 285
 286
 287 /* Make sure flist can hold at least flist->used + extra entries. */
 288 static void flist_expand(struct file_list *flist, int extra)
 289 {
 290         struct file_struct **new_ptr;
 291
 292         if (flist->used + extra <= flist->malloced)
 293                 return;
 294
 295         if (flist->malloced < FLIST_START)
 296                 flist->malloced = FLIST_START;
 297         else if (flist->malloced >= FLIST_LINEAR)
 298                 flist->malloced += FLIST_LINEAR;
 299         else
 300                 flist->malloced *= 2;
 301
 302         /* In case count jumped or we are starting the list
 303          * with a known size just set it. */
 304         if (flist->malloced < flist->used + extra)
 305                 flist->malloced = flist->used + extra;
 306
 307         new_ptr = realloc_array(flist->files, struct file_struct *,
 308                                 flist->malloced);
 309
 310         if (verbose >= 2 && flist->malloced != FLIST_START) {
 311                 rprintf(FCLIENT, "[%s] expand file_list pointer array to %.0f bytes, did%s move\n",
 312                     who_am_i(),
 313                     (double)sizeof flist->files[0] * flist->malloced,
 314                     (new_ptr == flist->files) ? " not" : "");
 315         }
 316
 317         flist->files = new_ptr;
 318
 319         if (!flist->files)
 320                 out_of_memory("flist_expand");
 321 }
 322
 323 static void flist_done_allocating(struct file_list *flist)
 324 {
 325         void *ptr = pool_boundary(flist->file_pool, 8*1024);
 326         if (flist->pool_boundary == ptr)
 327                 flist->pool_boundary = NULL; /* list didn't use any pool memory */
 328         else
 329                 flist->pool_boundary = ptr;
 330 }
 331
 332 int push_pathname(const char *dir, int len)
 333 {
 334         if (dir == pathname)
 335                 return 1;
 336
 337         if (!orig_dir)
 338                 orig_dir = strdup(curr_dir);
 339
 340         if (pathname && !pop_dir(orig_dir)) {
 341                 rsyserr(FERROR, errno, "pop_dir %s failed",
 342                         full_fname(orig_dir));
 343                 exit_cleanup(RERR_FILESELECT);
 344         }
 345
 346         if (dir && !push_dir(dir, 0)) {
 347                 io_error |= IOERR_GENERAL;
 348                 rsyserr(FERROR, errno, "push_dir %s failed in %s",
 349                         full_fname(dir), curr_dir);
 350                 return 0;
 351         }
 352
 353         pathname = dir;
 354         pathname_len = len >= 0 ? len : dir ? (int)strlen(dir) : 0;
 355
 356         return 1;
 357 }
 358
 359 static void send_file_entry(int f, struct file_struct *file, int ndx)
 360 {
 361         static time_t modtime;
 362         static mode_t mode;
 363         static int64 dev;
 364         static dev_t rdev;
 365         static uint32 rdev_major;
 366         static uid_t uid;
 367         static gid_t gid;
 368         static char *user_name, *group_name;
 369         static char lastname[MAXPATHLEN];
 370         char fname[MAXPATHLEN];
 371         int first_hlink_ndx = -1;
 372         int l1, l2;
 373         int xflags;
 374
 375 #ifdef ICONV_OPTION
 376         if (ic_send != (iconv_t)-1) {
 377                 ICONV_CONST char *ibuf;
 378                 char *obuf = fname;
 379                 size_t ocnt = MAXPATHLEN, icnt;
 380
 381                 iconv(ic_send, NULL,0, NULL,0);
 382                 if ((ibuf = (ICONV_CONST char *)file->dirname) != NULL) {
 383                     icnt = strlen(ibuf);
 384                     ocnt--; /* pre-subtract the space for the '/' */
 385                     if (iconv(ic_send, &ibuf,&icnt, &obuf,&ocnt) == (size_t)-1)
 386                         goto convert_error;
 387                     *obuf++ = '/';
 388                 }
 389
 390                 ibuf = (ICONV_CONST char *)file->basename;
 391                 icnt = strlen(ibuf);
 392                 if (iconv(ic_send, &ibuf,&icnt, &obuf,&ocnt) == (size_t)-1) {
 393                   convert_error:
 394                         io_error |= IOERR_GENERAL;
 395                         rprintf(FINFO,
 396                             "[%s] cannot convert filename: %s (%s)\n",
 397                             who_am_i(), f_name(file, fname), strerror(errno));
 398                         return;
 399                 }
 400                 *obuf = '\0';
 401         } else
 402 #endif
 403                 f_name(file, fname);
 404
 405         xflags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */
 406
 407         if (file->mode == mode)
 408                 xflags |= XMIT_SAME_MODE;
 409         else
 410                 mode = file->mode;
 411
 412         if (protocol_version >= 30 && S_ISDIR(mode) && !(file->flags & FLAG_XFER_DIR))
 413                 xflags |= XMIT_NON_XFER_DIR;
 414
 415         if ((preserve_devices && IS_DEVICE(mode))
 416          || (preserve_specials && IS_SPECIAL(mode))) {
 417                 if (protocol_version < 28) {
 418                         if (tmp_rdev == rdev)
 419                                 xflags |= XMIT_SAME_RDEV_pre28;
 420                         else
 421                                 rdev = tmp_rdev;
 422                 } else {
 423                         rdev = tmp_rdev;
 424                         if ((uint32)major(rdev) == rdev_major)
 425                                 xflags |= XMIT_SAME_RDEV_MAJOR;
 426                         else
 427                                 rdev_major = major(rdev);
 428                         if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu)
 429                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
 430                 }
 431         } else if (protocol_version < 28)
 432                 rdev = MAKEDEV(0, 0);
 433         if (uid_ndx) {
 434                 if ((uid_t)F_OWNER(file) == uid && *lastname)
 435                         xflags |= XMIT_SAME_UID;
 436                 else {
 437                         uid = F_OWNER(file);
 438                         if (uid_ndx && !numeric_ids) {
 439                                 user_name = add_uid(uid);
 440                                 if (inc_recurse && user_name)
 441                                         xflags |= XMIT_USER_NAME_FOLLOWS;
 442                         }
 443                 }
 444         }
 445         if (gid_ndx) {
 446                 if ((gid_t)F_GROUP(file) == gid && *lastname)
 447                         xflags |= XMIT_SAME_GID;
 448                 else {
 449                         gid = F_GROUP(file);
 450                         if (gid_ndx && !numeric_ids) {
 451                                 group_name = add_gid(gid);
 452                                 if (inc_recurse && group_name)
 453                                         xflags |= XMIT_GROUP_NAME_FOLLOWS;
 454                         }
 455                 }
 456         }
 457         if (file->modtime == modtime)
 458                 xflags |= XMIT_SAME_TIME;
 459         else
 460                 modtime = file->modtime;
 461
 462 #ifdef SUPPORT_HARD_LINKS
 463         if (tmp_dev != 0) {
 464                 if (protocol_version >= 30) {
 465                         struct ht_int64_node *np = idev_find(tmp_dev, tmp_ino);
 466                         first_hlink_ndx = (int32)(long)np->data - 1;
 467                         if (first_hlink_ndx < 0) {
 468                                 np->data = (void*)(long)(ndx + 1);
 469                                 xflags |= XMIT_HLINK_FIRST;
 470                         }
 471                         xflags |= XMIT_HLINKED;
 472                 } else {
 473                         if (tmp_dev == dev) {
 474                                 if (protocol_version >= 28)
 475                                         xflags |= XMIT_SAME_DEV_pre30;
 476                         } else
 477                                 dev = tmp_dev;
 478                         xflags |= XMIT_HLINKED;
 479                 }
 480         }
 481 #endif
 482
 483         for (l1 = 0;
 484             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 485             l1++) {}
 486         l2 = strlen(fname+l1);
 487
 488         if (l1 > 0)
 489                 xflags |= XMIT_SAME_NAME;
 490         if (l2 > 255)
 491                 xflags |= XMIT_LONG_NAME;
 492
 493         /* We must make sure we don't send a zero flag byte or the
 494          * other end will terminate the flist transfer.  Note that
 495          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 496          * it's harmless way to add a bit to the first flag byte. */
 497         if (protocol_version >= 28) {
 498                 if (!xflags && !S_ISDIR(mode))
 499                         xflags |= XMIT_TOP_DIR;
 500                 if ((xflags & 0xFF00) || !xflags) {
 501                         xflags |= XMIT_EXTENDED_FLAGS;
 502                         write_shortint(f, xflags);
 503                 } else
 504                         write_byte(f, xflags);
 505         } else {
 506                 if (!(xflags & 0xFF))
 507                         xflags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
 508                 write_byte(f, xflags);
 509         }
 510         if (xflags & XMIT_SAME_NAME)
 511                 write_byte(f, l1);
 512         if (xflags & XMIT_LONG_NAME)
 513                 write_varint30(f, l2);
 514         else
 515                 write_byte(f, l2);
 516         write_buf(f, fname + l1, l2);
 517
 518         if (first_hlink_ndx >= 0) {
 519                 write_varint(f, first_hlink_ndx);
 520                 goto the_end;
 521         }
 522
 523         write_varlong30(f, F_LENGTH(file), 3);
 524         if (!(xflags & XMIT_SAME_TIME)) {
 525                 if (protocol_version >= 30)
 526                         write_varlong(f, modtime, 4);
 527                 else
 528                         write_int(f, modtime);
 529         }
 530         if (!(xflags & XMIT_SAME_MODE))
 531                 write_int(f, to_wire_mode(mode));
 532         if (uid_ndx && !(xflags & XMIT_SAME_UID)) {
 533                 if (protocol_version < 30)
 534                         write_int(f, uid);
 535                 else {
 536                         write_varint(f, uid);
 537                         if (xflags & XMIT_USER_NAME_FOLLOWS) {
 538                                 int len = strlen(user_name);
 539                                 write_byte(f, len);
 540                                 write_buf(f, user_name, len);
 541                         }
 542                 }
 543         }
 544         if (gid_ndx && !(xflags & XMIT_SAME_GID)) {
 545                 if (protocol_version < 30)
 546                         write_int(f, gid);
 547                 else {
 548                         write_varint(f, gid);
 549                         if (xflags & XMIT_GROUP_NAME_FOLLOWS) {
 550                                 int len = strlen(group_name);
 551                                 write_byte(f, len);
 552                                 write_buf(f, group_name, len);
 553                         }
 554                 }
 555         }
 556         if ((preserve_devices && IS_DEVICE(mode))
 557          || (preserve_specials && IS_SPECIAL(mode))) {
 558                 if (protocol_version < 28) {
 559                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 560                                 write_int(f, (int)rdev);
 561                 } else {
 562                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 563                                 write_varint30(f, major(rdev));
 564                         if (protocol_version >= 30)
 565                                 write_varint(f, minor(rdev));
 566                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 567                                 write_byte(f, minor(rdev));
 568                         else
 569                                 write_int(f, minor(rdev));
 570                 }
 571         }
 572
 573 #ifdef SUPPORT_LINKS
 574         if (preserve_links && S_ISLNK(mode)) {
 575                 const char *sl = F_SYMLINK(file);
 576                 int len = strlen(sl);
 577                 write_varint30(f, len);
 578                 write_buf(f, sl, len);
 579         }
 580 #endif
 581
 582 #ifdef SUPPORT_HARD_LINKS
 583         if (tmp_dev != 0 && protocol_version < 30) {
 584                 if (protocol_version < 26) {
 585                         /* 32-bit dev_t and ino_t */
 586                         write_int(f, (int32)dev);
 587                         write_int(f, (int32)tmp_ino);
 588                 } else {
 589                         /* 64-bit dev_t and ino_t */
 590                         if (!(xflags & XMIT_SAME_DEV_pre30))
 591                                 write_longint(f, dev);
 592                         write_longint(f, tmp_ino);
 593                 }
 594         }
 595 #endif
 596
 597         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 598                 const char *sum;
 599                 if (S_ISREG(mode))
 600                         sum = tmp_sum;
 601                 else {
 602                         /* Prior to 28, we sent a useless set of nulls. */
 603                         sum = empty_sum;
 604                 }
 605                 write_buf(f, sum, checksum_len);
 606         }
 607
 608   the_end:
 609         strlcpy(lastname, fname, MAXPATHLEN);
 610
 611         if (S_ISREG(mode) || S_ISLNK(mode))
 612                 stats.total_size += F_LENGTH(file);
 613 }
 614
 615 static struct file_struct *recv_file_entry(struct file_list *flist,
 616                                            int xflags, int f)
 617 {
 618         static int64 modtime;
 619         static mode_t mode;
 620         static int64 dev;
 621         static dev_t rdev;
 622         static uint32 rdev_major;
 623         static uid_t uid;
 624         static gid_t gid;
 625         static uint16 gid_flags;
 626         static char lastname[MAXPATHLEN], *lastdir;
 627         static int lastdir_depth, lastdir_len = -1;
 628         static unsigned int del_hier_name_len = 0;
 629         static int in_del_hier = 0;
 630         char thisname[MAXPATHLEN];
 631         unsigned int l1 = 0, l2 = 0;
 632         int alloc_len, basename_len, linkname_len;
 633         int extra_len = file_extra_cnt * EXTRA_LEN;
 634         int first_hlink_ndx = -1;
 635         OFF_T file_length;
 636         const char *basename;
 637         struct file_struct *file;
 638         alloc_pool_t *pool;
 639         char *bp;
 640
 641         if (xflags & XMIT_SAME_NAME)
 642                 l1 = read_byte(f);
 643
 644         if (xflags & XMIT_LONG_NAME)
 645                 l2 = read_varint30(f);
 646         else
 647                 l2 = read_byte(f);
 648
 649         if (l2 >= MAXPATHLEN - l1) {
 650                 rprintf(FERROR,
 651                         "overflow: xflags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
 652                         xflags, l1, l2, lastname, who_am_i());
 653                 overflow_exit("recv_file_entry");
 654         }
 655
 656         strlcpy(thisname, lastname, l1 + 1);
 657         read_sbuf(f, &thisname[l1], l2);
 658         thisname[l1 + l2] = 0;
 659
 660         /* Abuse basename_len for a moment... */
 661         basename_len = strlcpy(lastname, thisname, MAXPATHLEN);
 662
 663 #ifdef ICONV_OPTION
 664         if (ic_recv != (iconv_t)-1) {
 665                 char *obuf = thisname;
 666                 ICONV_CONST char *ibuf = (ICONV_CONST char *)lastname;
 667                 size_t ocnt = MAXPATHLEN, icnt = basename_len;
 668
 669                 if (icnt >= MAXPATHLEN) {
 670                         errno = E2BIG;
 671                         goto convert_error;
 672                 }
 673
 674                 iconv(ic_recv, NULL,0, NULL,0);
 675                 if (iconv(ic_recv, &ibuf,&icnt, &obuf,&ocnt) == (size_t)-1) {
 676                   convert_error:
 677                         io_error |= IOERR_GENERAL;
 678                         rprintf(FINFO,
 679                             "[%s] cannot convert filename: %s (%s)\n",
 680                             who_am_i(), lastname, strerror(errno));
 681                         obuf = thisname;
 682                 }
 683                 *obuf = '\0';
 684         }
 685 #endif
 686
 687         clean_fname(thisname, 0);
 688
 689         if (sanitize_paths)
 690                 sanitize_path(thisname, thisname, "", 0, NULL);
 691
 692         if ((basename = strrchr(thisname, '/')) != NULL) {
 693                 int len = basename++ - thisname;
 694                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
 695                         lastdir = new_array(char, len + 1);
 696                         memcpy(lastdir, thisname, len);
 697                         lastdir[len] = '\0';
 698                         lastdir_len = len;
 699                         lastdir_depth = count_dir_elements(lastdir);
 700                 }
 701         } else
 702                 basename = thisname;
 703         basename_len = strlen(basename) + 1; /* count the '\0' */
 704
 705 #ifdef SUPPORT_HARD_LINKS
 706         if (protocol_version >= 30
 707          && BITS_SETnUNSET(xflags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
 708                 struct file_struct *first;
 709                 first_hlink_ndx = read_varint(f);
 710                 if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->used) {
 711                         rprintf(FERROR,
 712                                 "hard-link reference out of range: %d (%d)\n",
 713                                 first_hlink_ndx, flist->used);
 714                         exit_cleanup(RERR_PROTOCOL);
 715                 }
 716                 first = flist->files[first_hlink_ndx];
 717                 file_length = F_LENGTH(first);
 718                 modtime = first->modtime;
 719                 mode = first->mode;
 720                 if (uid_ndx)
 721                         uid = F_OWNER(first);
 722                 if (gid_ndx)
 723                         gid = F_GROUP(first);
 724                 if ((preserve_devices && IS_DEVICE(mode))
 725                  || (preserve_specials && IS_SPECIAL(mode))) {
 726                         uint32 *devp = F_RDEV_P(first);
 727                         rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
 728                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 729                 }
 730                 if (preserve_links && S_ISLNK(mode))
 731                         linkname_len = strlen(F_SYMLINK(first)) + 1;
 732                 else
 733                         linkname_len = 0;
 734                 goto create_object;
 735         }
 736 #endif
 737
 738         file_length = read_varlong30(f, 3);
 739         if (!(xflags & XMIT_SAME_TIME)) {
 740                 if (protocol_version >= 30) {
 741                         modtime = read_varlong(f, 4);
 742 #if SIZEOF_TIME_T < SIZEOF_INT64
 743                         if ((modtime > INT_MAX || modtime < INT_MIN) && !am_generator) {
 744                                 rprintf(FERROR,
 745                                     "Time value of %s truncated on receiver.\n",
 746                                     lastname);
 747                         }
 748 #endif
 749                 } else
 750                         modtime = read_int(f);
 751         }
 752         if (!(xflags & XMIT_SAME_MODE))
 753                 mode = from_wire_mode(read_int(f));
 754
 755         if (chmod_modes && !S_ISLNK(mode))
 756                 mode = tweak_mode(mode, chmod_modes);
 757
 758         if (uid_ndx && !(xflags & XMIT_SAME_UID)) {
 759                 if (protocol_version < 30)
 760                         uid = (uid_t)read_int(f);
 761                 else {
 762                         uid = (uid_t)read_varint(f);
 763                         if (xflags & XMIT_USER_NAME_FOLLOWS)
 764                                 uid = recv_user_name(f, uid);
 765                         else if (inc_recurse && am_root && !numeric_ids)
 766                                 uid = match_uid(uid);
 767                 }
 768         }
 769         if (gid_ndx && !(xflags & XMIT_SAME_GID)) {
 770                 if (protocol_version < 30)
 771                         gid = (gid_t)read_int(f);
 772                 else {
 773                         gid = (gid_t)read_varint(f);
 774                         gid_flags = 0;
 775                         if (xflags & XMIT_GROUP_NAME_FOLLOWS)
 776                                 gid = recv_group_name(f, gid, &gid_flags);
 777                         else if (inc_recurse && (!am_root || !numeric_ids))
 778                                 gid = match_gid(gid, &gid_flags);
 779                 }
 780         }
 781
 782         if ((preserve_devices && IS_DEVICE(mode))
 783          || (preserve_specials && IS_SPECIAL(mode))) {
 784                 if (protocol_version < 28) {
 785                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 786                                 rdev = (dev_t)read_int(f);
 787                 } else {
 788                         uint32 rdev_minor;
 789                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 790                                 rdev_major = read_varint30(f);
 791                         if (protocol_version >= 30)
 792                                 rdev_minor = read_varint(f);
 793                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 794                                 rdev_minor = read_byte(f);
 795                         else
 796                                 rdev_minor = read_int(f);
 797                         rdev = MAKEDEV(rdev_major, rdev_minor);
 798                 }
 799                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 800                 file_length = 0;
 801         } else if (protocol_version < 28)
 802                 rdev = MAKEDEV(0, 0);
 803
 804 #ifdef SUPPORT_LINKS
 805         if (preserve_links && S_ISLNK(mode)) {
 806                 linkname_len = read_varint30(f) + 1; /* count the '\0' */
 807                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 808                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 809                                 linkname_len - 1);
 810                         overflow_exit("recv_file_entry");
 811                 }
 812         }
 813         else
 814 #endif
 815                 linkname_len = 0;
 816
 817 #ifdef SUPPORT_HARD_LINKS
 818   create_object:
 819         if (preserve_hard_links) {
 820                 if (protocol_version < 28 && S_ISREG(mode))
 821                         xflags |= XMIT_HLINKED;
 822                 if (xflags & XMIT_HLINKED)
 823                         extra_len += EXTRA_LEN;
 824         }
 825 #endif
 826
 827 #ifdef SUPPORT_ACLS
 828         /* We need one or two index int32s when we're preserving ACLs. */
 829         if (preserve_acls)
 830                 extra_len += (S_ISDIR(mode) ? 2 : 1) * EXTRA_LEN;
 831 #endif
 832
 833         if (always_checksum && S_ISREG(mode))
 834                 extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
 835
 836         if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
 837                 extra_len += EXTRA_LEN;
 838
 839 #if EXTRA_ROUNDING > 0
 840         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
 841                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
 842 #endif
 843
 844         if (inc_recurse && S_ISDIR(mode)) {
 845                 if (one_file_system) {
 846                         /* Room to save the dir's device for -x */
 847                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 848                 }
 849                 pool = dir_flist->file_pool;
 850         } else
 851                 pool = flist->file_pool;
 852
 853         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
 854                   + linkname_len;
 855         bp = pool_alloc(pool, alloc_len, "recv_file_entry");
 856
 857         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
 858         bp += extra_len;
 859         file = (struct file_struct *)bp;
 860         bp += FILE_STRUCT_LEN;
 861
 862         memcpy(bp, basename, basename_len);
 863         bp += basename_len + linkname_len; /* skip space for symlink too */
 864
 865 #ifdef SUPPORT_HARD_LINKS
 866         if (xflags & XMIT_HLINKED)
 867                 file->flags |= FLAG_HLINKED;
 868 #endif
 869         file->modtime = (time_t)modtime;
 870         file->len32 = (uint32)file_length;
 871         if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
 872                 file->flags |= FLAG_LENGTH64;
 873                 OPT_EXTRA(file, 0)->unum = (uint32)(file_length >> 32);
 874         }
 875         file->mode = mode;
 876         if (uid_ndx)
 877                 F_OWNER(file) = uid;
 878         if (gid_ndx) {
 879                 F_GROUP(file) = gid;
 880                 file->flags |= gid_flags;
 881         }
 882 #ifdef ICONV_OPTION
 883         if (ic_ndx)
 884                 F_NDX(file) = flist->used + flist->ndx_start;
 885 #endif
 886
 887         if (basename != thisname) {
 888                 file->dirname = lastdir;
 889                 F_DEPTH(file) = lastdir_depth + 1;
 890         } else
 891                 F_DEPTH(file) = 1;
 892
 893         if (S_ISDIR(mode)) {
 894                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
 895                         F_DEPTH(file)--;
 896                 if (xflags & XMIT_TOP_DIR) {
 897                         in_del_hier = recurse;
 898                         del_hier_name_len = F_DEPTH(file) == 0 ? 0 : l1 + l2;
 899                         if (relative_paths && del_hier_name_len > 2
 900                             && lastname[del_hier_name_len-1] == '.'
 901                             && lastname[del_hier_name_len-2] == '/')
 902                                 del_hier_name_len -= 2;
 903                         file->flags |= FLAG_TOP_DIR | FLAG_XFER_DIR;
 904                 } else if (protocol_version >= 30) {
 905                         if (!(xflags & XMIT_NON_XFER_DIR))
 906                                 file->flags |= FLAG_XFER_DIR;
 907                 } else if (in_del_hier) {
 908                         if (!relative_paths || !del_hier_name_len
 909                          || (l1 >= del_hier_name_len
 910                           && lastname[del_hier_name_len] == '/'))
 911                                 file->flags |= FLAG_XFER_DIR;
 912                         else
 913                                 in_del_hier = 0;
 914                 }
 915         }
 916
 917         if ((preserve_devices && IS_DEVICE(mode))
 918          || (preserve_specials && IS_SPECIAL(mode))) {
 919                 uint32 *devp = F_RDEV_P(file);
 920                 DEV_MAJOR(devp) = major(rdev);
 921                 DEV_MINOR(devp) = minor(rdev);
 922         }
 923
 924 #ifdef SUPPORT_LINKS
 925         if (linkname_len) {
 926                 bp = (char*)file->basename + basename_len;
 927                 if (first_hlink_ndx >= 0) {
 928                         struct file_struct *first = flist->files[first_hlink_ndx];
 929                         memcpy(bp, F_SYMLINK(first), linkname_len);
 930                 } else
 931                         read_sbuf(f, bp, linkname_len - 1);
 932                 if (sanitize_paths)
 933                         sanitize_path(bp, bp, "", lastdir_depth, NULL);
 934         }
 935 #endif
 936
 937 #ifdef SUPPORT_HARD_LINKS
 938         if (preserve_hard_links && xflags & XMIT_HLINKED) {
 939                 if (protocol_version >= 30) {
 940                         F_HL_GNUM(file) = xflags & XMIT_HLINK_FIRST
 941                                         ? flist->used : first_hlink_ndx;
 942                 } else {
 943                         static int32 cnt = 0;
 944                         struct ht_int64_node *np;
 945                         int64 ino;
 946                         int32 ndx;
 947                         if (protocol_version < 26) {
 948                                 dev = read_int(f);
 949                                 ino = read_int(f);
 950                         } else {
 951                                 if (!(xflags & XMIT_SAME_DEV_pre30))
 952                                         dev = read_longint(f);
 953                                 ino = read_longint(f);
 954                         }
 955                         np = idev_find(dev, ino);
 956                         ndx = (int32)(long)np->data - 1;
 957                         if (ndx < 0) {
 958                                 ndx = cnt++;
 959                                 np->data = (void*)(long)cnt;
 960                         }
 961                         F_HL_GNUM(file) = ndx;
 962                 }
 963         }
 964 #endif
 965
 966         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 967                 if (S_ISREG(mode))
 968                         bp = F_SUM(file);
 969                 else {
 970                         /* Prior to 28, we get a useless set of nulls. */
 971                         bp = tmp_sum;
 972                 }
 973                 if (first_hlink_ndx >= 0) {
 974                         struct file_struct *first = flist->files[first_hlink_ndx];
 975                         memcpy(bp, F_SUM(first), checksum_len);
 976                 } else
 977                         read_buf(f, bp, checksum_len);
 978         }
 979
 980 #ifdef SUPPORT_ACLS
 981         if (preserve_acls && !S_ISLNK(mode))
 982                 receive_acl(file, f);
 983 #endif
 984 #ifdef SUPPORT_XATTRS
 985         if (preserve_xattrs)
 986                 receive_xattr(file, f );
 987 #endif
 988
 989         if (S_ISREG(mode) || S_ISLNK(mode))
 990                 stats.total_size += file_length;
 991
 992         return file;
 993 }
 994
 995 /* Create a file_struct for a named file by reading its stat() information
 996  * and performing extensive checks against global options.
 997  *
 998  * Returns a pointer to the new file struct, or NULL if there was an error
 999  * or this file should be excluded. */
1000 struct file_struct *make_file(const char *fname, struct file_list *flist,
1001                               STRUCT_STAT *stp, int flags, int filter_level)
1002 {
1003         static char *lastdir;
1004         static int lastdir_len = -1;
1005         struct file_struct *file;
1006         char thisname[MAXPATHLEN];
1007         char linkname[MAXPATHLEN];
1008         int alloc_len, basename_len, linkname_len;
1009         int extra_len = file_extra_cnt * EXTRA_LEN;
1010         const char *basename;
1011         alloc_pool_t *pool;
1012         STRUCT_STAT st;
1013         char *bp;
1014
1015         if (strlcpy(thisname, fname, sizeof thisname) >= sizeof thisname) {
1016                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
1017                 return NULL;
1018         }
1019         clean_fname(thisname, 0);
1020         if (sanitize_paths)
1021                 sanitize_path(thisname, thisname, "", 0, NULL);
1022
1023         if (stp && S_ISDIR(stp->st_mode)) {
1024                 st = *stp; /* Needed for "symlink/." with --relative. */
1025                 *linkname = '\0'; /* make IBM code checker happy */
1026         } else if (readlink_stat(thisname, &st, linkname) != 0) {
1027                 int save_errno = errno;
1028                 /* See if file is excluded before reporting an error. */
1029                 if (filter_level != NO_FILTERS
1030                  && (is_excluded(thisname, 0, filter_level)
1031                   || is_excluded(thisname, 1, filter_level))) {
1032                         if (ignore_perishable && save_errno != ENOENT)
1033                                 non_perishable_cnt++;
1034                         return NULL;
1035                 }
1036                 if (save_errno == ENOENT) {
1037 #ifdef SUPPORT_LINKS
1038                         /* Avoid "vanished" error if symlink points nowhere. */
1039                         if (copy_links && x_lstat(thisname, &st, NULL) == 0
1040                             && S_ISLNK(st.st_mode)) {
1041                                 io_error |= IOERR_GENERAL;
1042                                 rprintf(FERROR, "symlink has no referent: %s\n",
1043                                         full_fname(thisname));
1044                         } else
1045 #endif
1046                         {
1047                                 enum logcode c = am_daemon && protocol_version < 28
1048                                     ? FERROR : FINFO;
1049                                 io_error |= IOERR_VANISHED;
1050                                 rprintf(c, "file has vanished: %s\n",
1051                                         full_fname(thisname));
1052                         }
1053                 } else {
1054                         io_error |= IOERR_GENERAL;
1055                         rsyserr(FERROR, save_errno, "readlink %s failed",
1056                                 full_fname(thisname));
1057                 }
1058                 return NULL;
1059         }
1060
1061         /* backup.c calls us with filter_level set to NO_FILTERS. */
1062         if (filter_level == NO_FILTERS)
1063                 goto skip_filters;
1064
1065         if (S_ISDIR(st.st_mode)) {
1066                 if (!xfer_dirs) {
1067                         rprintf(FINFO, "skipping directory %s\n", thisname);
1068                         return NULL;
1069                 }
1070         } else
1071                 flags &= ~FLAG_XFER_DIR;
1072
1073         /* -x only affects directories because we need to avoid recursing
1074          * into a mount-point directory, not to avoid copying a symlinked
1075          * file if -L (or similar) was specified. */
1076         if (one_file_system && st.st_dev != filesystem_dev
1077          && S_ISDIR(st.st_mode)) {
1078                 if (one_file_system > 1) {
1079                         if (verbose > 2) {
1080                                 rprintf(FINFO, "skipping mount-point dir %s\n",
1081                                         thisname);
1082                         }
1083                         return NULL;
1084                 }
1085                 flags |= FLAG_MOUNT_DIR;
1086         }
1087
1088         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level)) {
1089                 if (ignore_perishable)
1090                         non_perishable_cnt++;
1091                 return NULL;
1092         }
1093
1094         if (lp_ignore_nonreadable(module_id)) {
1095 #ifdef SUPPORT_LINKS
1096                 if (!S_ISLNK(st.st_mode))
1097 #endif
1098                         if (access(thisname, R_OK) != 0)
1099                                 return NULL;
1100         }
1101
1102   skip_filters:
1103
1104         /* Only divert a directory in the main transfer. */
1105         if (flist) {
1106                 if (flist->prev && S_ISDIR(st.st_mode)
1107                  && flags & FLAG_DIVERT_DIRS) {
1108                         /* Room for parent/sibling/next-child info. */
1109                         extra_len += DIRNODE_EXTRA_CNT * EXTRA_LEN;
1110                         dir_count++;
1111                         pool = dir_flist->file_pool;
1112                 } else
1113                         pool = flist->file_pool;
1114         } else
1115                 pool = NULL;
1116
1117         if (verbose > 2) {
1118                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
1119                         who_am_i(), thisname, filter_level);
1120         }
1121
1122         if ((basename = strrchr(thisname, '/')) != NULL) {
1123                 int len = basename++ - thisname;
1124                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
1125                         lastdir = new_array(char, len + 1);
1126                         memcpy(lastdir, thisname, len);
1127                         lastdir[len] = '\0';
1128                         lastdir_len = len;
1129                 }
1130         } else
1131                 basename = thisname;
1132         basename_len = strlen(basename) + 1; /* count the '\0' */
1133
1134 #ifdef SUPPORT_LINKS
1135         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
1136 #else
1137         linkname_len = 0;
1138 #endif
1139
1140         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
1141                 extra_len += EXTRA_LEN;
1142
1143 #if EXTRA_ROUNDING > 0
1144         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
1145                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
1146 #endif
1147
1148         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
1149                   + linkname_len;
1150         if (pool)
1151                 bp = pool_alloc(pool, alloc_len, "make_file");
1152         else {
1153                 if (!(bp = new_array(char, alloc_len)))
1154                         out_of_memory("make_file");
1155         }
1156
1157         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
1158         bp += extra_len;
1159         file = (struct file_struct *)bp;
1160         bp += FILE_STRUCT_LEN;
1161
1162         memcpy(bp, basename, basename_len);
1163         bp += basename_len + linkname_len; /* skip space for symlink too */
1164
1165 #ifdef SUPPORT_HARD_LINKS
1166         if (preserve_hard_links && flist && flist->prev) {
1167                 if (protocol_version >= 28
1168                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
1169                  : S_ISREG(st.st_mode)) {
1170                         tmp_dev = st.st_dev;
1171                         tmp_ino = st.st_ino;
1172                 } else
1173                         tmp_dev = 0;
1174         }
1175 #endif
1176
1177 #ifdef HAVE_STRUCT_STAT_ST_RDEV
1178         if (IS_DEVICE(st.st_mode) || IS_SPECIAL(st.st_mode)) {
1179                 tmp_rdev = st.st_rdev;
1180                 st.st_size = 0;
1181         }
1182 #endif
1183
1184         file->flags = flags;
1185         file->modtime = st.st_mtime;
1186         file->len32 = (uint32)st.st_size;
1187         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
1188                 file->flags |= FLAG_LENGTH64;
1189                 OPT_EXTRA(file, 0)->unum = (uint32)(st.st_size >> 32);
1190         }
1191         file->mode = st.st_mode;
1192         if (uid_ndx)
1193                 F_OWNER(file) = st.st_uid;
1194         if (gid_ndx)
1195                 F_GROUP(file) = st.st_gid;
1196
1197         if (basename != thisname)
1198                 file->dirname = lastdir;
1199
1200 #ifdef SUPPORT_LINKS
1201         if (linkname_len) {
1202                 bp = (char*)file->basename + basename_len;
1203                 memcpy(bp, linkname, linkname_len);
1204         }
1205 #endif
1206
1207         if (always_checksum && am_sender && S_ISREG(st.st_mode))
1208                 file_checksum(thisname, tmp_sum, st.st_size);
1209
1210         F_PATHNAME(file) = pathname;
1211
1212         /* This code is only used by the receiver when it is building
1213          * a list of files for a delete pass. */
1214         if (keep_dirlinks && linkname_len && flist) {
1215                 STRUCT_STAT st2;
1216                 int save_mode = file->mode;
1217                 file->mode = S_IFDIR; /* Find a directory with our name. */
1218                 if (flist_find(dir_flist, file) >= 0
1219                  && x_stat(thisname, &st2, NULL) == 0 && S_ISDIR(st2.st_mode)) {
1220                         file->modtime = st2.st_mtime;
1221                         file->len32 = 0;
1222                         file->mode = st2.st_mode;
1223                         if (uid_ndx)
1224                                 F_OWNER(file) = st2.st_uid;
1225                         if (gid_ndx)
1226                                 F_GROUP(file) = st2.st_gid;
1227                 } else
1228                         file->mode = save_mode;
1229         }
1230
1231         if (basename_len == 0+1)
1232                 return NULL;
1233
1234 #ifdef ICONV_OPTION
1235         if (ic_ndx)
1236                 F_NDX(file) = dir_count - 1;
1237 #endif
1238
1239         return file;
1240 }
1241
1242 /* Only called for temporary file_struct entries created by make_file(). */
1243 void unmake_file(struct file_struct *file)
1244 {
1245         int extra_cnt = file_extra_cnt + LEN64_BUMP(file);
1246 #if EXTRA_ROUNDING > 0
1247         if (extra_cnt & EXTRA_ROUNDING)
1248                 extra_cnt = (extra_cnt | EXTRA_ROUNDING) + 1;
1249 #endif
1250         free(REQ_EXTRA(file, extra_cnt));
1251 }
1252
1253 static struct file_struct *send_file_name(int f, struct file_list *flist,
1254                                           char *fname, STRUCT_STAT *stp,
1255                                           int flags, int filter_level)
1256 {
1257         struct file_struct *file;
1258 #if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
1259         statx sx;
1260 #endif
1261
1262         file = make_file(fname, flist, stp, flags, filter_level);
1263         if (!file)
1264                 return NULL;
1265
1266         if (chmod_modes && !S_ISLNK(file->mode))
1267                 file->mode = tweak_mode(file->mode, chmod_modes);
1268
1269 #ifdef SUPPORT_ACLS
1270         if (preserve_acls && !S_ISLNK(file->mode) && f >= 0) {
1271                 sx.st.st_mode = file->mode;
1272                 sx.acc_acl = sx.def_acl = NULL;
1273                 if (get_acl(fname, &sx) < 0)
1274                         return NULL;
1275         }
1276 #endif
1277 #ifdef SUPPORT_XATTRS
1278         if (preserve_xattrs && f >= 0) {
1279                 sx.xattr = NULL;
1280                 if (get_xattr(fname, &sx) < 0)
1281                         return NULL;
1282         }
1283 #endif
1284
1285         maybe_emit_filelist_progress(flist->used + flist_count_offset);
1286
1287         flist_expand(flist, 1);
1288         flist->files[flist->used++] = file;
1289         if (f >= 0) {
1290                 send_file_entry(f, file, flist->used - 1);
1291 #ifdef SUPPORT_ACLS
1292                 if (preserve_acls && !S_ISLNK(file->mode)) {
1293                         send_acl(&sx, f);
1294                         free_acl(&sx);
1295                 }
1296 #endif
1297 #ifdef SUPPORT_XATTRS
1298                 if (preserve_xattrs) {
1299                         F_XATTR(file) = send_xattr(&sx, f);
1300                         free_xattr(&sx);
1301                 }
1302 #endif
1303         }
1304         return file;
1305 }
1306
1307 static void send_if_directory(int f, struct file_list *flist,
1308                               struct file_struct *file,
1309                               char *fbuf, unsigned int ol,
1310                               int flags)
1311 {
1312         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1313
1314         if (S_ISDIR(file->mode)
1315             && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) {
1316                 void *save_filters;
1317                 unsigned int len = strlen(fbuf);
1318                 if (len > 1 && fbuf[len-1] == '/')
1319                         fbuf[--len] = '\0';
1320                 if (len >= MAXPATHLEN - 1) {
1321                         io_error |= IOERR_GENERAL;
1322                         rprintf(FERROR, "skipping long-named directory: %s\n",
1323                                 full_fname(fbuf));
1324                         return;
1325                 }
1326                 save_filters = push_local_filters(fbuf, len);
1327                 send_directory(f, flist, fbuf, len, flags);
1328                 pop_local_filters(save_filters);
1329                 fbuf[ol] = '\0';
1330                 if (is_dot_dir)
1331                         fbuf[ol-1] = '.';
1332         }
1333 }
1334
1335 static int file_compare(const void *file1, const void *file2)
1336 {
1337         return f_name_cmp(*(struct file_struct **)file1,
1338                           *(struct file_struct **)file2);
1339 }
1340
1341 /* The guts of a merge-sort algorithm.  This was derived from the glibc
1342  * version, but I (Wayne) changed the merge code to do less copying and
1343  * to require only half the amount of temporary memory. */
1344 static void fsort_tmp(struct file_struct **fp, size_t num,
1345                       struct file_struct **tmp)
1346 {
1347         struct file_struct **f1, **f2, **t;
1348         size_t n1, n2;
1349
1350         n1 = num / 2;
1351         n2 = num - n1;
1352         f1 = fp;
1353         f2 = fp + n1;
1354
1355         if (n1 > 1)
1356                 fsort_tmp(f1, n1, tmp);
1357         if (n2 > 1)
1358                 fsort_tmp(f2, n2, tmp);
1359
1360         while (f_name_cmp(*f1, *f2) <= 0) {
1361                 if (!--n1)
1362                         return;
1363                 f1++;
1364         }
1365
1366         t = tmp;
1367         memcpy(t, f1, n1 * PTR_SIZE);
1368
1369         *f1++ = *f2++, n2--;
1370
1371         while (n1 > 0 && n2 > 0) {
1372                 if (f_name_cmp(*t, *f2) <= 0)
1373                         *f1++ = *t++, n1--;
1374                 else
1375                         *f1++ = *f2++, n2--;
1376         }
1377
1378         if (n1 > 0)
1379                 memcpy(f1, t, n1 * PTR_SIZE);
1380 }
1381
1382 /* This file-struct sorting routine makes sure that any identical names in
1383  * the file list stay in the same order as they were in the original list.
1384  * This is particularly vital in inc_recurse mode where we expect a sort
1385  * on the flist to match the exact order of a sort on the dir_flist. */
1386 static void fsort(struct file_struct **fp, size_t num)
1387 {
1388         if (num <= 1)
1389                 return;
1390
1391         if (use_qsort)
1392                 qsort(fp, num, PTR_SIZE, file_compare);
1393         else {
1394                 struct file_struct **tmp = new_array(struct file_struct *,
1395                                                      (num+1) / 2);
1396                 fsort_tmp(fp, num, tmp);
1397                 free(tmp);
1398         }
1399 }
1400
1401 /* We take an entire set of sibling dirs from the sorted flist and link them
1402  * into the tree, setting the appropriate parent/child/sibling pointers. */
1403 static void add_dirs_to_tree(int parent_ndx, struct file_list *from_flist,
1404                              int dir_cnt)
1405 {
1406         int i;
1407         int32 *dp = NULL;
1408         int32 *parent_dp = parent_ndx < 0 ? NULL
1409                          : F_DIR_NODE_P(dir_flist->sorted[parent_ndx]);
1410
1411         flist_expand(dir_flist, dir_cnt);
1412         dir_flist->sorted = dir_flist->files;
1413
1414         for (i = 0; dir_cnt; i++) {
1415                 struct file_struct *file = from_flist->sorted[i];
1416
1417                 if (!S_ISDIR(file->mode))
1418                         continue;
1419
1420                 dir_flist->files[dir_flist->used++] = file;
1421                 dir_cnt--;
1422
1423                 if (!(file->flags & FLAG_XFER_DIR)
1424                  || file->flags & FLAG_MOUNT_DIR)
1425                         continue;
1426
1427                 if (dp)
1428                         DIR_NEXT_SIBLING(dp) = dir_flist->used - 1;
1429                 else if (parent_dp)
1430                         DIR_FIRST_CHILD(parent_dp) = dir_flist->used - 1;
1431                 else
1432                         send_dir_ndx = dir_flist->used - 1;
1433
1434                 dp = F_DIR_NODE_P(file);
1435                 DIR_PARENT(dp) = parent_ndx;
1436                 DIR_FIRST_CHILD(dp) = -1;
1437         }
1438         if (dp)
1439                 DIR_NEXT_SIBLING(dp) = -1;
1440 }
1441
1442 /* This function is normally called by the sender, but the receiving side also
1443  * calls it from get_dirlist() with f set to -1 so that we just construct the
1444  * file list in memory without sending it over the wire.  Also, get_dirlist()
1445  * might call this with f set to -2, which also indicates that local filter
1446  * rules should be ignored. */
1447 static void send_directory(int f, struct file_list *flist, char *fbuf, int len,
1448                            int flags)
1449 {
1450         struct dirent *di;
1451         unsigned remainder;
1452         char *p;
1453         DIR *d;
1454         int divert_dirs = (flags & FLAG_DIVERT_DIRS) != 0;
1455         int start = flist->used;
1456         int filter_level = f == -2 ? SERVER_FILTERS : ALL_FILTERS;
1457
1458         assert(flist != NULL);
1459
1460         if (!(d = opendir(fbuf))) {
1461                 io_error |= IOERR_GENERAL;
1462                 rsyserr(FERROR, errno, "opendir %s failed", full_fname(fbuf));
1463                 return;
1464         }
1465
1466         p = fbuf + len;
1467         if (len != 1 || *fbuf != '/')
1468                 *p++ = '/';
1469         *p = '\0';
1470         remainder = MAXPATHLEN - (p - fbuf);
1471
1472         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1473                 char *dname = d_name(di);
1474                 if (dname[0] == '.' && (dname[1] == '\0'
1475                     || (dname[1] == '.' && dname[2] == '\0')))
1476                         continue;
1477                 if (strlcpy(p, dname, remainder) >= remainder) {
1478                         io_error |= IOERR_GENERAL;
1479                         rprintf(FINFO,
1480                                 "cannot send long-named file %s\n",
1481                                 full_fname(fbuf));
1482                         continue;
1483                 }
1484                 if (dname[0] == '\0') {
1485                         io_error |= IOERR_GENERAL;
1486                         rprintf(FINFO,
1487                                 "cannot send file with empty name in %s\n",
1488                                 full_fname(fbuf));
1489                         continue;
1490                 }
1491
1492                 send_file_name(f, flist, fbuf, NULL, flags, filter_level);
1493         }
1494
1495         fbuf[len] = '\0';
1496
1497         if (errno) {
1498                 io_error |= IOERR_GENERAL;
1499                 rsyserr(FERROR, errno, "readdir(%s)", full_fname(fbuf));
1500         }
1501
1502         closedir(d);
1503
1504         if (f >= 0 && recurse && !divert_dirs) {
1505                 int i, end = flist->used - 1;
1506                 /* send_if_directory() bumps flist->used, so use "end". */
1507                 for (i = start; i <= end; i++)
1508                         send_if_directory(f, flist, flist->files[i], fbuf, len, flags);
1509         }
1510 }
1511
1512 static void send1extra(int f, struct file_struct *file, struct file_list *flist)
1513 {
1514         char fbuf[MAXPATHLEN];
1515         int dlen;
1516
1517         f_name(file, fbuf);
1518         dlen = strlen(fbuf);
1519
1520         if (F_PATHNAME(file) != pathname) {
1521                 if (!push_pathname(F_PATHNAME(file), -1))
1522                         exit_cleanup(RERR_FILESELECT);
1523         }
1524
1525         change_local_filter_dir(fbuf, dlen, send_dir_depth);
1526
1527         send_directory(f, flist, fbuf, dlen, FLAG_DIVERT_DIRS | FLAG_XFER_DIR);
1528 }
1529
1530 void send_extra_file_list(int f, int at_least)
1531 {
1532         struct file_list *flist;
1533         int64 start_write;
1534         int future_cnt, save_io_error = io_error;
1535
1536         if (flist_eof)
1537                 return;
1538
1539         /* Keep sending data until we have the requested number of
1540          * files in the upcoming file-lists. */
1541         if (cur_flist->next) {
1542                 flist = first_flist->prev; /* the newest flist */
1543                 future_cnt = flist->ndx_end - cur_flist->next->ndx_start + 1;
1544         } else
1545                 future_cnt = 0;
1546         while (future_cnt < at_least) {
1547                 struct file_struct *file = dir_flist->sorted[send_dir_ndx];
1548                 int dir_ndx, dstart = dir_count;
1549                 int32 *dp;
1550
1551                 flist = flist_new(0, "send_extra_file_list");
1552                 start_write = stats.total_written;
1553
1554 #ifdef ICONV_OPTION
1555                 if (ic_ndx)
1556                         dir_ndx = F_NDX(file);
1557                 else
1558 #endif
1559                         dir_ndx = send_dir_ndx;
1560                 write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
1561                 flist->parent_ndx = dir_ndx;
1562
1563                 send1extra(f, file, flist);
1564                 dp = F_DIR_NODE_P(file);
1565
1566                 /* If there are any duplicate directory names that follow, we
1567                  * send all the dirs together in one file-list.  The dir_flist
1568                  * tree links all the child subdirs onto the last dup dir. */
1569                 while ((dir_ndx = DIR_NEXT_SIBLING(dp)) >= 0
1570                     && dir_flist->sorted[dir_ndx]->flags & FLAG_DUPLICATE) {
1571                         send_dir_ndx = dir_ndx;
1572                         file = dir_flist->sorted[dir_ndx];
1573                         send1extra(f, file, flist);
1574                         dp = F_DIR_NODE_P(file);
1575                 }
1576
1577                 write_byte(f, 0);
1578
1579 #ifdef ICONV_OPTION
1580                 if (need_unsorted_flist) {
1581                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
1582                                 out_of_memory("send_extra_file_list");
1583                         memcpy(flist->sorted, flist->files,
1584                                flist->used * sizeof (struct file_struct*));
1585                 } else
1586 #endif
1587                         flist->sorted = flist->files;
1588
1589                 clean_flist(flist, 0);
1590
1591                 flist->ndx_end = flist->ndx_start + flist->used - 1
1592                                - (dir_count - dstart);
1593
1594                 add_dirs_to_tree(send_dir_ndx, flist, dir_count - dstart);
1595                 flist_done_allocating(flist);
1596
1597                 file_total += flist->used;
1598                 future_cnt += flist->used;
1599                 stats.flist_size += stats.total_written - start_write;
1600                 stats.num_files += flist->used;
1601                 if (verbose > 3)
1602                         output_flist(flist);
1603
1604                 if (DIR_FIRST_CHILD(dp) >= 0) {
1605                         send_dir_ndx = DIR_FIRST_CHILD(dp);
1606                         send_dir_depth++;
1607                 } else {
1608                         while (DIR_NEXT_SIBLING(dp) < 0) {
1609                                 if ((send_dir_ndx = DIR_PARENT(dp)) < 0) {
1610                                         write_ndx(f, NDX_FLIST_EOF);
1611                                         flist_eof = 1;
1612                                         change_local_filter_dir(NULL, 0, 0);
1613                                         goto finish;
1614                                 }
1615                                 send_dir_depth--;
1616                                 file = dir_flist->sorted[send_dir_ndx];
1617                                 dp = F_DIR_NODE_P(file);
1618                         }
1619                         send_dir_ndx = DIR_NEXT_SIBLING(dp);
1620                 }
1621         }
1622
1623   finish:
1624         if (io_error != save_io_error && !ignore_errors)
1625                 send_msg_int(MSG_IO_ERROR, io_error);
1626 }
1627
1628 struct file_list *send_file_list(int f, int argc, char *argv[])
1629 {
1630         static const char *lastdir;
1631         static int lastdir_len = -1;
1632         int len, dirlen;
1633         STRUCT_STAT st;
1634         char *p, *dir;
1635         char lastpath[MAXPATHLEN] = "";
1636         struct file_list *flist;
1637         struct timeval start_tv, end_tv;
1638         int64 start_write;
1639         int use_ff_fd = 0;
1640         int flags, disable_buffering;
1641
1642         rprintf(FLOG, "building file list\n");
1643         if (show_filelist_p())
1644                 start_filelist_progress("building file list");
1645         else if (inc_recurse && verbose && !am_server)
1646                 rprintf(FCLIENT, "sending incremental file list\n");
1647
1648         start_write = stats.total_written;
1649         gettimeofday(&start_tv, NULL);
1650
1651 #ifdef SUPPORT_HARD_LINKS
1652         if (preserve_hard_links && protocol_version >= 30 && !cur_flist)
1653                 init_hard_links();
1654 #endif
1655
1656         flist = cur_flist = flist_new(0, "send_file_list");
1657         if (inc_recurse) {
1658                 dir_flist = flist_new(FLIST_TEMP, "send_file_list");
1659                 flags = FLAG_DIVERT_DIRS | FLAG_XFER_DIR;
1660         } else {
1661                 dir_flist = cur_flist;
1662                 flags = FLAG_XFER_DIR;
1663         }
1664
1665         disable_buffering = io_start_buffering_out(f);
1666         if (filesfrom_fd >= 0) {
1667                 if (argv[0] && !push_dir(argv[0], 0)) {
1668                         rsyserr(FERROR, errno, "push_dir %s failed in %s",
1669                                 full_fname(argv[0]), curr_dir);
1670                         exit_cleanup(RERR_FILESELECT);
1671                 }
1672                 use_ff_fd = 1;
1673         }
1674
1675         while (1) {
1676                 char fbuf[MAXPATHLEN];
1677                 char *fn;
1678                 int is_dot_dir;
1679
1680                 if (use_ff_fd) {
1681                         if (read_filesfrom_line(filesfrom_fd, fbuf) == 0)
1682                                 break;
1683                         sanitize_path(fbuf, fbuf, "", 0, NULL);
1684                 } else {
1685                         if (argc-- == 0)
1686                                 break;
1687                         strlcpy(fbuf, *argv++, MAXPATHLEN);
1688                         if (sanitize_paths)
1689                                 sanitize_path(fbuf, fbuf, "", 0, NULL);
1690                 }
1691
1692                 len = strlen(fbuf);
1693                 if (relative_paths) {
1694                         /* We clean up fbuf below. */
1695                         is_dot_dir = 0;
1696                 } else if (!len || fbuf[len - 1] == '/') {
1697                         if (len == 2 && fbuf[0] == '.') {
1698                                 /* Turn "./" into just "." rather than "./." */
1699                                 fbuf[1] = '\0';
1700                         } else {
1701                                 if (len + 1 >= MAXPATHLEN)
1702                                         overflow_exit("send_file_list");
1703                                 fbuf[len++] = '.';
1704                                 fbuf[len] = '\0';
1705                         }
1706                         is_dot_dir = 1;
1707                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
1708                     && (len == 2 || fbuf[len-3] == '/')) {
1709                         if (len + 2 >= MAXPATHLEN)
1710                                 overflow_exit("send_file_list");
1711                         fbuf[len++] = '/';
1712                         fbuf[len++] = '.';
1713                         fbuf[len] = '\0';
1714                         is_dot_dir = 1;
1715                 } else {
1716                         is_dot_dir = fbuf[len-1] == '.'
1717                                    && (len == 1 || fbuf[len-2] == '/');
1718                 }
1719
1720                 dir = NULL;
1721
1722                 if (!relative_paths) {
1723                         p = strrchr(fbuf, '/');
1724                         if (p) {
1725                                 *p = '\0';
1726                                 if (p == fbuf)
1727                                         dir = "/";
1728                                 else
1729                                         dir = fbuf;
1730                                 len -= p - fbuf + 1;
1731                                 fn = p + 1;
1732                         } else
1733                                 fn = fbuf;
1734                 } else {
1735                         if ((p = strstr(fbuf, "/./")) != NULL) {
1736                                 *p = '\0';
1737                                 if (p == fbuf)
1738                                         dir = "/";
1739                                 else
1740                                         dir = fbuf;
1741                                 len -= p - fbuf + 3;
1742                                 fn = p + 3;
1743                         } else
1744                                 fn = fbuf;
1745                         /* Get rid of trailing "/" and "/.". */
1746                         while (len) {
1747                                 if (fn[len - 1] == '/') {
1748                                         is_dot_dir = 1;
1749                                         if (!--len && !dir) {
1750                                                 len++;
1751                                                 break;
1752                                         }
1753                                 }
1754                                 else if (len >= 2 && fn[len - 1] == '.'
1755                                                   && fn[len - 2] == '/') {
1756                                         is_dot_dir = 1;
1757                                         if (!(len -= 2) && !dir) {
1758                                                 len++;
1759                                                 break;
1760                                         }
1761                                 } else
1762                                         break;
1763                         }
1764                         if (len == 1 && fn[0] == '/')
1765                                 fn[len++] = '.';
1766                         fn[len] = '\0';
1767                         /* Reject a ".." dir in the active part of the path. */
1768                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
1769                                 if ((p[2] == '/' || p[2] == '\0')
1770                                  && (p == fn || p[-1] == '/')) {
1771                                         rprintf(FERROR,
1772                                             "found \"..\" dir in relative path: %s\n",
1773                                             fbuf);
1774                                         exit_cleanup(RERR_SYNTAX);
1775                                 }
1776                         }
1777                 }
1778
1779                 if (!*fn) {
1780                         len = 1;
1781                         fn = ".";
1782                 }
1783
1784                 dirlen = dir ? strlen(dir) : 0;
1785                 if (dirlen != lastdir_len || memcmp(lastdir, dir, dirlen) != 0) {
1786                         if (!push_pathname(dir ? strdup(dir) : NULL, dirlen))
1787                                 goto push_error;
1788                         lastdir = pathname;
1789                         lastdir_len = pathname_len;
1790                 } else if (!push_pathname(lastdir, lastdir_len)) {
1791                   push_error:
1792                         io_error |= IOERR_GENERAL;
1793                         rsyserr(FERROR, errno, "push_dir %s failed in %s",
1794                                 full_fname(dir), curr_dir);
1795                         continue;
1796                 }
1797
1798                 if (fn != fbuf)
1799                         memmove(fbuf, fn, len + 1);
1800
1801                 if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1802                         io_error |= IOERR_GENERAL;
1803                         rsyserr(FERROR, errno, "link_stat %s failed",
1804                                 full_fname(fbuf));
1805                         continue;
1806                 }
1807
1808                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
1809                         rprintf(FINFO, "skipping directory %s\n", fbuf);
1810                         continue;
1811                 }
1812
1813                 if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
1814                         /* Send the implied directories at the start of the
1815                          * source spec, so we get their permissions right. */
1816                         char *lp = lastpath, *slash = fbuf;
1817                         *p = '\0';
1818                         /* Skip any initial directories in our path that we
1819                          * have in common with lastpath. */
1820                         for (fn = fbuf; *fn && *lp == *fn; lp++, fn++) {
1821                                 if (*fn == '/')
1822                                         slash = fn;
1823                         }
1824                         *p = '/';
1825                         if (fn != p || (*lp && *lp != '/')) {
1826                                 int save_copy_links = copy_links;
1827                                 int save_xfer_dirs = xfer_dirs;
1828                                 int dir_flags = flags & ~FLAG_XFER_DIR;
1829                                 copy_links |= copy_unsafe_links;
1830                                 xfer_dirs = 1;
1831                                 while ((slash = strchr(slash+1, '/')) != 0) {
1832                                         *slash = '\0';
1833                                         send_file_name(f, flist, fbuf, NULL,
1834                                                        dir_flags, ALL_FILTERS);
1835                                         *slash = '/';
1836                                 }
1837                                 copy_links = save_copy_links;
1838                                 xfer_dirs = save_xfer_dirs;
1839                                 *p = '\0';
1840                                 strlcpy(lastpath, fbuf, sizeof lastpath);
1841                                 *p = '/';
1842                         }
1843                 }
1844
1845                 if (one_file_system)
1846                         filesystem_dev = st.st_dev;
1847
1848                 if (recurse || (xfer_dirs && is_dot_dir)) {
1849                         struct file_struct *file;
1850                         int top_flags = FLAG_TOP_DIR | flags;
1851                         file = send_file_name(f, flist, fbuf, &st,
1852                                               top_flags, ALL_FILTERS);
1853                         if (file && !inc_recurse)
1854                                 send_if_directory(f, flist, file, fbuf, len, flags);
1855                 } else
1856                         send_file_name(f, flist, fbuf, &st, flags, ALL_FILTERS);
1857         }
1858
1859         gettimeofday(&end_tv, NULL);
1860         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
1861                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
1862         if (stats.flist_buildtime == 0)
1863                 stats.flist_buildtime = 1;
1864         start_tv = end_tv;
1865
1866         write_byte(f, 0); /* Indicate end of file list */
1867
1868 #ifdef SUPPORT_HARD_LINKS
1869         if (preserve_hard_links && protocol_version >= 30 && !inc_recurse)
1870                 idev_destroy();
1871 #endif
1872
1873         if (show_filelist_p())
1874                 finish_filelist_progress(flist);
1875
1876         gettimeofday(&end_tv, NULL);
1877         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
1878                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
1879
1880         /* When converting names, both sides keep an unsorted file-list array
1881          * because the names will differ on the sending and receiving sides
1882          * (both sides will use the unsorted index number for each item). */
1883
1884         /* Sort the list without removing any duplicates.  This allows the
1885          * receiving side to ask for whatever name it kept.  For incremental
1886          * recursion mode, the sender marks duplicate dirs so that it can
1887          * send them together in a single file-list. */
1888 #ifdef ICONV_OPTION
1889         if (need_unsorted_flist) {
1890                 if (inc_recurse) {
1891                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
1892                                 out_of_memory("send_file_list");
1893                         memcpy(flist->sorted, flist->files,
1894                                flist->used * sizeof (struct file_struct*));
1895                         clean_flist(flist, 0);
1896                 } else {
1897                         flist->sorted = flist->files;
1898                         flist->low = 0;
1899                         flist->high = flist->used - 1;
1900                 }
1901         } else
1902 #endif
1903         {
1904                 flist->sorted = flist->files;
1905                 clean_flist(flist, 0);
1906         }
1907         file_total += flist->used;
1908
1909         /* We don't subtract dir_count for the first send since we
1910          * might have one or more dot dirs which need to get sent. */
1911         flist->ndx_end = flist->ndx_start + flist->used - 1;
1912
1913         if (!numeric_ids && !inc_recurse)
1914                 send_id_list(f);
1915
1916         /* send the io_error flag */
1917         if (protocol_version < 30)
1918                 write_int(f, ignore_errors ? 0 : io_error);
1919         else if (io_error && !ignore_errors)
1920                 send_msg_int(MSG_IO_ERROR, io_error);
1921
1922         if (disable_buffering)
1923                 io_end_buffering_out();
1924
1925         stats.flist_size = stats.total_written - start_write;
1926         stats.num_files = flist->used;
1927
1928         if (verbose > 3)
1929                 output_flist(flist);
1930
1931         if (verbose > 2)
1932                 rprintf(FINFO, "send_file_list done\n");
1933
1934         if (inc_recurse) {
1935                 add_dirs_to_tree(-1, flist, dir_count);
1936                 flist_done_allocating(flist);
1937                 if (send_dir_ndx < 0) {
1938                         write_ndx(f, NDX_FLIST_EOF);
1939                         flist_eof = 1;
1940                 }
1941                 else if (file_total == 1) {
1942                         /* If we're creating incremental file-lists and there
1943                          * was just 1 item in the first file-list, send 1 more
1944                          * file-list to check if this is a 1-file xfer. */
1945                         send_extra_file_list(f, 1);
1946                 }
1947         }
1948
1949         return flist;
1950 }
1951
1952 struct file_list *recv_file_list(int f)
1953 {
1954         struct file_list *flist;
1955         int dstart, flags;
1956         int64 start_read;
1957
1958         if (!first_flist)
1959                 rprintf(FLOG, "receiving file list\n");
1960         if (show_filelist_p())
1961                 start_filelist_progress("receiving file list");
1962         else if (inc_recurse && verbose && !am_server && !first_flist)
1963                 rprintf(FCLIENT, "receiving incremental file list\n");
1964
1965         start_read = stats.total_read;
1966
1967 #ifdef SUPPORT_HARD_LINKS
1968         if (preserve_hard_links && protocol_version < 30)
1969                 init_hard_links();
1970 #endif
1971
1972         flist = flist_new(0, "recv_file_list");
1973
1974         if (inc_recurse) {
1975                 if (flist->ndx_start == 0)
1976                         dir_flist = flist_new(FLIST_TEMP, "recv_file_list");
1977                 dstart = dir_flist->used;
1978         } else {
1979                 dir_flist = flist;
1980                 dstart = 0;
1981         }
1982
1983         while ((flags = read_byte(f)) != 0) {
1984                 struct file_struct *file;
1985
1986                 flist_expand(flist, 1);
1987
1988                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
1989                         flags |= read_byte(f) << 8;
1990                 file = recv_file_entry(flist, flags, f);
1991
1992                 if (inc_recurse && S_ISDIR(file->mode)) {
1993                         flist_expand(dir_flist, 1);
1994                         dir_flist->files[dir_flist->used++] = file;
1995                 }
1996
1997                 flist->files[flist->used++] = file;
1998
1999                 maybe_emit_filelist_progress(flist->used);
2000
2001                 if (verbose > 2) {
2002                         rprintf(FINFO, "recv_file_name(%s)\n",
2003                                 f_name(file, NULL));
2004                 }
2005         }
2006         file_total += flist->used;
2007
2008         flist->ndx_end = flist->ndx_start + flist->used - 1;
2009         if (inc_recurse && flist->ndx_start)
2010                 flist->ndx_end -= dir_flist->used - dstart;
2011
2012         if (verbose > 2)
2013                 rprintf(FINFO, "received %d names\n", flist->used);
2014
2015         if (show_filelist_p())
2016                 finish_filelist_progress(flist);
2017
2018 #ifdef ICONV_OPTION
2019         if (need_unsorted_flist) {
2020                 /* Create an extra array of index pointers that we can sort for
2021                  * the generator's use (for wading through the files in sorted
2022                  * order and for calling flist_find()).  We keep the "files"
2023                  * list unsorted for our exchange of index numbers with the
2024                  * other side (since their names may not sort the same). */
2025                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2026                         out_of_memory("recv_file_list");
2027                 memcpy(flist->sorted, flist->files,
2028                        flist->used * sizeof (struct file_struct*));
2029                 if (inc_recurse && dir_flist->used > dstart) {
2030                         dir_flist->sorted = realloc_array(dir_flist->sorted,
2031                                                 struct file_struct *,
2032                                                 dir_flist->used);
2033                         memcpy(dir_flist->sorted + dstart, dir_flist->files + dstart,
2034                                (dir_flist->used - dstart) * sizeof (struct file_struct*));
2035                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2036                 }
2037         } else
2038 #endif
2039         {
2040                 flist->sorted = flist->files;
2041                 if (inc_recurse && dir_flist->used > dstart) {
2042                         dir_flist->sorted = dir_flist->files;
2043                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2044                 }
2045         }
2046
2047         if (inc_recurse)
2048                 flist_done_allocating(flist);
2049         else if (f >= 0)
2050                 recv_id_list(f, flist);
2051
2052         clean_flist(flist, relative_paths);
2053
2054         if (protocol_version < 30) {
2055                 /* Recv the io_error flag */
2056                 if (ignore_errors)
2057                         read_int(f);
2058                 else
2059                         io_error |= read_int(f);
2060         }
2061
2062         if (verbose > 3)
2063                 output_flist(flist);
2064
2065         if (list_only) {
2066                 int i;
2067                 for (i = flist->low; i <= flist->high; i++)
2068                         list_file_entry(flist->files[i]);
2069         }
2070
2071         if (verbose > 2)
2072                 rprintf(FINFO, "recv_file_list done\n");
2073
2074         stats.flist_size += stats.total_read - start_read;
2075         stats.num_files += flist->used;
2076
2077         return flist;
2078 }
2079
2080 /* This is only used once by the receiver if the very first file-list
2081  * has exactly one item in it. */
2082 void recv_additional_file_list(int f)
2083 {
2084         struct file_list *flist;
2085         int ndx = read_ndx(f);
2086         if (ndx == NDX_FLIST_EOF) {
2087                 flist_eof = 1;
2088                 change_local_filter_dir(NULL, 0, 0);
2089         } else {
2090                 ndx = NDX_FLIST_OFFSET - ndx;
2091                 if (ndx < 0 || ndx >= dir_flist->used) {
2092                         ndx = NDX_FLIST_OFFSET - ndx;
2093                         rprintf(FERROR,
2094                                 "[%s] Invalid dir index: %d (%d - %d)\n",
2095                                 who_am_i(), ndx, NDX_FLIST_OFFSET,
2096                                 NDX_FLIST_OFFSET - dir_flist->used + 1);
2097                         exit_cleanup(RERR_PROTOCOL);
2098                 }
2099                 if (verbose > 3) {
2100                         rprintf(FINFO, "[%s] receiving flist for dir %d\n",
2101                                 who_am_i(), ndx);
2102                 }
2103                 flist = recv_file_list(f);
2104                 flist->parent_ndx = ndx;
2105         }
2106 }
2107
2108 /* Search for an identically-named item in the file list.  Note that the
2109  * items must agree in their directory-ness, or no match is returned. */
2110 int flist_find(struct file_list *flist, struct file_struct *f)
2111 {
2112         int low = flist->low, high = flist->high;
2113         int diff, mid, mid_up;
2114
2115         while (low <= high) {
2116                 mid = (low + high) / 2;
2117                 if (F_IS_ACTIVE(flist->sorted[mid]))
2118                         mid_up = mid;
2119                 else {
2120                         /* Scan for the next non-empty entry using the cached
2121                          * distance values.  If the value isn't fully up-to-
2122                          * date, update it. */
2123                         mid_up = mid + F_DEPTH(flist->sorted[mid]);
2124                         if (!F_IS_ACTIVE(flist->sorted[mid_up])) {
2125                                 do {
2126                                     mid_up += F_DEPTH(flist->sorted[mid_up]);
2127                                 } while (!F_IS_ACTIVE(flist->sorted[mid_up]));
2128                                 F_DEPTH(flist->sorted[mid]) = mid_up - mid;
2129                         }
2130                         if (mid_up > high) {
2131                                 /* If there's nothing left above us, set high to
2132                                  * a non-empty entry below us and continue. */
2133                                 high = mid - (int)flist->sorted[mid]->len32;
2134                                 if (!F_IS_ACTIVE(flist->sorted[high])) {
2135                                         do {
2136                                             high -= (int)flist->sorted[high]->len32;
2137                                         } while (!F_IS_ACTIVE(flist->sorted[high]));
2138                                         flist->sorted[mid]->len32 = mid - high;
2139                                 }
2140                                 continue;
2141                         }
2142                 }
2143                 diff = f_name_cmp(flist->sorted[mid_up], f);
2144                 if (diff == 0) {
2145                         if (protocol_version < 29
2146                             && S_ISDIR(flist->sorted[mid_up]->mode)
2147                             != S_ISDIR(f->mode))
2148                                 return -1;
2149                         return mid_up;
2150                 }
2151                 if (diff < 0)
2152                         low = mid_up + 1;
2153                 else
2154                         high = mid - 1;
2155         }
2156         return -1;
2157 }
2158
2159 /*
2160  * Free up any resources a file_struct has allocated
2161  * and clear the file.
2162  */
2163 void clear_file(struct file_struct *file)
2164 {
2165         /* The +1 zeros out the first char of the basename. */
2166         memset(file, 0, FILE_STRUCT_LEN + 1);
2167         /* In an empty entry, F_DEPTH() is an offset to the next non-empty
2168          * entry.  Likewise for len32 in the opposite direction.  We assume
2169          * that we're alone for now since flist_find() will adjust the counts
2170          * it runs into that aren't up-to-date. */
2171         file->len32 = F_DEPTH(file) = 1;
2172 }
2173
2174 /* Allocate a new file list. */
2175 struct file_list *flist_new(int flags, char *msg)
2176 {
2177         struct file_list *flist;
2178
2179         flist = new0(struct file_list);
2180         if (!flist)
2181                 out_of_memory(msg);
2182
2183         if (flags & FLIST_TEMP) {
2184                 if (!(flist->file_pool = pool_create(SMALL_EXTENT, 0,
2185                                                 out_of_memory, POOL_INTERN)))
2186                         out_of_memory(msg);
2187         } else {
2188                 /* This is a doubly linked list with prev looping back to
2189                  * the end of the list, but the last next pointer is NULL. */
2190                 if (!first_flist) {
2191                         flist->file_pool = pool_create(NORMAL_EXTENT, 0,
2192                                                 out_of_memory, POOL_INTERN);
2193                         if (!flist->file_pool)
2194                                 out_of_memory(msg);
2195
2196                         first_flist = cur_flist = flist->prev = flist;
2197                 } else {
2198                         flist->file_pool = first_flist->file_pool;
2199
2200                         flist->ndx_start = first_flist->prev->ndx_end + 2;
2201
2202                         flist->prev = first_flist->prev;
2203                         flist->prev->next = first_flist->prev = flist;
2204                 }
2205                 flist->pool_boundary = pool_boundary(flist->file_pool, 0);
2206                 flist_cnt++;
2207         }
2208
2209         return flist;
2210 }
2211
2212 /* Free up all elements in a flist. */
2213 void flist_free(struct file_list *flist)
2214 {
2215         if (!flist->prev) {
2216                 /* Was FLIST_TEMP dir-list. */
2217         } else if (flist == flist->prev) {
2218                 first_flist = cur_flist = NULL;
2219                 file_total = 0;
2220                 flist_cnt = 0;
2221         } else {
2222                 if (flist == cur_flist)
2223                         cur_flist = flist->next;
2224                 if (flist == first_flist)
2225                         first_flist = first_flist->next;
2226                 else {
2227                         flist->prev->next = flist->next;
2228                         if (!flist->next)
2229                                 flist->next = first_flist;
2230                 }
2231                 flist->next->prev = flist->prev;
2232                 file_total -= flist->used;
2233                 flist_cnt--;
2234         }
2235
2236         if (!flist->prev || !flist_cnt)
2237                 pool_destroy(flist->file_pool);
2238         else
2239                 pool_free_old(flist->file_pool, flist->pool_boundary);
2240
2241         if (flist->sorted && flist->sorted != flist->files)
2242                 free(flist->sorted);
2243         free(flist->files);
2244         free(flist);
2245 }
2246
2247 /* This routine ensures we don't have any duplicate names in our file list.
2248  * duplicate names can cause corruption because of the pipelining. */
2249 static void clean_flist(struct file_list *flist, int strip_root)
2250 {
2251         char fbuf[MAXPATHLEN];
2252         int i, prev_i;
2253
2254         if (!flist)
2255                 return;
2256         if (flist->used == 0) {
2257                 flist->high = -1;
2258                 flist->low = 0;
2259                 return;
2260         }
2261
2262         fsort(flist->sorted, flist->used);
2263
2264         if (!am_sender || inc_recurse) {
2265                 for (i = prev_i = 0; i < flist->used; i++) {
2266                         if (F_IS_ACTIVE(flist->sorted[i])) {
2267                                 prev_i = i;
2268                                 break;
2269                         }
2270                 }
2271                 flist->low = prev_i;
2272         } else {
2273                 i = prev_i = flist->used - 1;
2274                 flist->low = 0;
2275         }
2276
2277         while (++i < flist->used) {
2278                 int j;
2279                 struct file_struct *file = flist->sorted[i];
2280
2281                 if (!F_IS_ACTIVE(file))
2282                         continue;
2283                 if (f_name_cmp(file, flist->sorted[prev_i]) == 0)
2284                         j = prev_i;
2285                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
2286                         int save_mode = file->mode;
2287                         /* Make sure that this directory doesn't duplicate a
2288                          * non-directory earlier in the list. */
2289                         flist->high = prev_i;
2290                         file->mode = S_IFREG;
2291                         j = flist_find(flist, file);
2292                         file->mode = save_mode;
2293                 } else
2294                         j = -1;
2295                 if (j >= 0) {
2296                         int keep, drop;
2297                         /* If one is a dir and the other is not, we want to
2298                          * keep the dir because it might have contents in the
2299                          * list. */
2300                         if (S_ISDIR(file->mode)) {
2301                                 struct file_struct *fp = flist->sorted[j];
2302                                 if (!S_ISDIR(fp->mode))
2303                                         keep = i, drop = j;
2304                                 else
2305                                         keep = j, drop = i;
2306                         } else
2307                                 keep = j, drop = i;
2308
2309                         if (am_sender)
2310                                 flist->sorted[drop]->flags |= FLAG_DUPLICATE;
2311                         else {
2312                                 if (verbose > 1) {
2313                                         rprintf(FINFO,
2314                                             "removing duplicate name %s from file list (%d)\n",
2315                                             f_name(file, fbuf), drop + flist->ndx_start);
2316                                 }
2317                                 /* Make sure we don't lose track of a user-specified
2318                                  * top directory. */
2319                                 flist->sorted[keep]->flags |= flist->sorted[drop]->flags
2320                                                            & (FLAG_TOP_DIR|FLAG_XFER_DIR);
2321
2322                                 clear_file(flist->sorted[drop]);
2323                         }
2324
2325                         if (keep == i) {
2326                                 if (flist->low == drop) {
2327                                         for (j = drop + 1;
2328                                              j < i && !F_IS_ACTIVE(flist->sorted[j]);
2329                                              j++) {}
2330                                         flist->low = j;
2331                                 }
2332                                 prev_i = i;
2333                         }
2334                 } else
2335                         prev_i = i;
2336         }
2337         flist->high = prev_i;
2338
2339         if (strip_root) {
2340                 /* We need to strip off the leading slashes for relative
2341                  * paths, but this must be done _after_ the sorting phase. */
2342                 for (i = flist->low; i <= flist->high; i++) {
2343                         struct file_struct *file = flist->sorted[i];
2344
2345                         if (!file->dirname)
2346                                 continue;
2347                         while (*file->dirname == '/')
2348                                 file->dirname++;
2349                         if (!*file->dirname)
2350                                 file->dirname = NULL;
2351                 }
2352         }
2353
2354         if (prune_empty_dirs && !am_sender) {
2355                 int j, prev_depth = 0;
2356
2357                 prev_i = 0; /* It's OK that this isn't really true. */
2358
2359                 for (i = flist->low; i <= flist->high; i++) {
2360                         struct file_struct *fp, *file = flist->sorted[i];
2361
2362                         /* This temporarily abuses the F_DEPTH() value for a
2363                          * directory that is in a chain that might get pruned.
2364                          * We restore the old value if it gets a reprieve. */
2365                         if (S_ISDIR(file->mode) && F_DEPTH(file)) {
2366                                 /* Dump empty dirs when coming back down. */
2367                                 for (j = prev_depth; j >= F_DEPTH(file); j--) {
2368                                         fp = flist->sorted[prev_i];
2369                                         if (F_DEPTH(fp) >= 0)
2370                                                 break;
2371                                         prev_i = -F_DEPTH(fp)-1;
2372                                         clear_file(fp);
2373                                 }
2374                                 prev_depth = F_DEPTH(file);
2375                                 if (is_excluded(f_name(file, fbuf), 1,
2376                                                        ALL_FILTERS)) {
2377                                         /* Keep dirs through this dir. */
2378                                         for (j = prev_depth-1; ; j--) {
2379                                                 fp = flist->sorted[prev_i];
2380                                                 if (F_DEPTH(fp) >= 0)
2381                                                         break;
2382                                                 prev_i = -F_DEPTH(fp)-1;
2383                                                 F_DEPTH(fp) = j;
2384                                         }
2385                                 } else
2386                                         F_DEPTH(file) = -prev_i-1;
2387                                 prev_i = i;
2388                         } else {
2389                                 /* Keep dirs through this non-dir. */
2390                                 for (j = prev_depth; ; j--) {
2391                                         fp = flist->sorted[prev_i];
2392                                         if (F_DEPTH(fp) >= 0)
2393                                                 break;
2394                                         prev_i = -F_DEPTH(fp)-1;
2395                                         F_DEPTH(fp) = j;
2396                                 }
2397                         }
2398                 }
2399                 /* Dump all remaining empty dirs. */
2400                 while (1) {
2401                         struct file_struct *fp = flist->sorted[prev_i];
2402                         if (F_DEPTH(fp) >= 0)
2403                                 break;
2404                         prev_i = -F_DEPTH(fp)-1;
2405                         clear_file(fp);
2406                 }
2407
2408                 for (i = flist->low; i <= flist->high; i++) {
2409                         if (F_IS_ACTIVE(flist->sorted[i]))
2410                                 break;
2411                 }
2412                 flist->low = i;
2413                 for (i = flist->high; i >= flist->low; i--) {
2414                         if (F_IS_ACTIVE(flist->sorted[i]))
2415                                 break;
2416                 }
2417                 flist->high = i;
2418         }
2419 }
2420
2421 static void output_flist(struct file_list *flist)
2422 {
2423         char uidbuf[16], gidbuf[16], depthbuf[16];
2424         struct file_struct *file;
2425         const char *root, *dir, *slash, *name, *trail;
2426         const char *who = who_am_i();
2427         int i;
2428
2429         rprintf(FINFO, "[%s] flist start=%d, end=%d, used=%d, low=%d, high=%d\n",
2430                 who, flist->ndx_start, flist->ndx_end, flist->used, flist->low, flist->high);
2431         for (i = 0; i < flist->used; i++) {
2432                 file = flist->sorted[i];
2433                 if ((am_root || am_sender) && uid_ndx) {
2434                         snprintf(uidbuf, sizeof uidbuf, " uid=%u",
2435                                  F_OWNER(file));
2436                 } else
2437                         *uidbuf = '\0';
2438                 if (gid_ndx) {
2439                         static char parens[] = "(\0)\0\0\0";
2440                         char *pp = parens + (file->flags & FLAG_SKIP_GROUP ? 0 : 3);
2441                         snprintf(gidbuf, sizeof gidbuf, " gid=%s%u%s",
2442                                  pp, F_GROUP(file), pp + 2);
2443                 } else
2444                         *gidbuf = '\0';
2445                 if (!am_sender)
2446                         snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file));
2447                 if (F_IS_ACTIVE(file)) {
2448                         root = am_sender ? NS(F_PATHNAME(file)) : depthbuf;
2449                         if ((dir = file->dirname) == NULL)
2450                                 dir = slash = "";
2451                         else
2452                                 slash = "/";
2453                         name = file->basename;
2454                         trail = S_ISDIR(file->mode) ? "/" : "";
2455                 } else
2456                         root = dir = slash = name = trail = "";
2457                 rprintf(FINFO,
2458                         "[%s] i=%d %s %s%s%s%s mode=0%o len=%.0f%s%s flags=%x\n",
2459                         who, i + flist->ndx_start,
2460                         root, dir, slash, name, trail,
2461                         (int)file->mode, (double)F_LENGTH(file),
2462                         uidbuf, gidbuf, file->flags);
2463         }
2464 }
2465
2466 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
2467 enum fnc_type { t_PATH, t_ITEM };
2468
2469 static int found_prefix;
2470
2471 /* Compare the names of two file_struct entities, similar to how strcmp()
2472  * would do if it were operating on the joined strings.
2473  *
2474  * Some differences beginning with protocol_version 29: (1) directory names
2475  * are compared with an assumed trailing slash so that they compare in a
2476  * way that would cause them to sort immediately prior to any content they
2477  * may have; (2) a directory of any name compares after a non-directory of
2478  * any name at the same depth; (3) a directory with name "." compares prior
2479  * to anything else.  These changes mean that a directory and a non-dir
2480  * with the same name will not compare as equal (protocol_version >= 29).
2481  *
2482  * The dirname component can be an empty string, but the basename component
2483  * cannot (and never is in the current codebase).  The basename component
2484  * may be NULL (for a removed item), in which case it is considered to be
2485  * after any existing item. */
2486 int f_name_cmp(const struct file_struct *f1, const struct file_struct *f2)
2487 {
2488         int dif;
2489         const uchar *c1, *c2;
2490         enum fnc_state state1, state2;
2491         enum fnc_type type1, type2;
2492         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
2493
2494         if (!f1 || !F_IS_ACTIVE(f1)) {
2495                 if (!f2 || !F_IS_ACTIVE(f2))
2496                         return 0;
2497                 return -1;
2498         }
2499         if (!f2 || !F_IS_ACTIVE(f2))
2500                 return 1;
2501
2502         c1 = (uchar*)f1->dirname;
2503         c2 = (uchar*)f2->dirname;
2504         if (c1 == c2)
2505                 c1 = c2 = NULL;
2506         if (!c1) {
2507                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2508                 c1 = (const uchar*)f1->basename;
2509                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2510                         type1 = t_ITEM;
2511                         state1 = s_TRAILING;
2512                         c1 = (uchar*)"";
2513                 } else
2514                         state1 = s_BASE;
2515         } else {
2516                 type1 = t_path;
2517                 state1 = s_DIR;
2518         }
2519         if (!c2) {
2520                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2521                 c2 = (const uchar*)f2->basename;
2522                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2523                         type2 = t_ITEM;
2524                         state2 = s_TRAILING;
2525                         c2 = (uchar*)"";
2526                 } else
2527                         state2 = s_BASE;
2528         } else {
2529                 type2 = t_path;
2530                 state2 = s_DIR;
2531         }
2532
2533         if (type1 != type2)
2534                 return type1 == t_PATH ? 1 : -1;
2535
2536         do {
2537                 if (!*c1) {
2538                         switch (state1) {
2539                         case s_DIR:
2540                                 state1 = s_SLASH;
2541                                 c1 = (uchar*)"/";
2542                                 break;
2543                         case s_SLASH:
2544                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2545                                 c1 = (const uchar*)f1->basename;
2546                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2547                                         type1 = t_ITEM;
2548                                         state1 = s_TRAILING;
2549                                         c1 = (uchar*)"";
2550                                 } else
2551                                         state1 = s_BASE;
2552                                 break;
2553                         case s_BASE:
2554                                 state1 = s_TRAILING;
2555                                 if (type1 == t_PATH) {
2556                                         c1 = (uchar*)"/";
2557                                         break;
2558                                 }
2559                                 /* FALL THROUGH */
2560                         case s_TRAILING:
2561                                 type1 = t_ITEM;
2562                                 break;
2563                         }
2564                         if (*c2 && type1 != type2)
2565                                 return type1 == t_PATH ? 1 : -1;
2566                 }
2567                 if (!*c2) {
2568                         switch (state2) {
2569                         case s_DIR:
2570                                 state2 = s_SLASH;
2571                                 c2 = (uchar*)"/";
2572                                 break;
2573                         case s_SLASH:
2574                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2575                                 c2 = (const uchar*)f2->basename;
2576                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2577                                         type2 = t_ITEM;
2578                                         state2 = s_TRAILING;
2579                                         c2 = (uchar*)"";
2580                                 } else
2581                                         state2 = s_BASE;
2582                                 break;
2583                         case s_BASE:
2584                                 state2 = s_TRAILING;
2585                                 if (type2 == t_PATH) {
2586                                         c2 = (uchar*)"/";
2587                                         break;
2588                                 }
2589                                 /* FALL THROUGH */
2590                         case s_TRAILING:
2591                                 found_prefix = 1;
2592                                 if (!*c1)
2593                                         return 0;
2594                                 type2 = t_ITEM;
2595                                 break;
2596                         }
2597                         if (type1 != type2)
2598                                 return type1 == t_PATH ? 1 : -1;
2599                 }
2600         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
2601
2602         return dif;
2603 }
2604
2605 /* Returns 1 if f1's filename has all of f2's filename as a prefix.  This does
2606  * not match if f2's basename is not an exact match of a path element in f1.
2607  * E.g. /path/foo is not a prefix of /path/foobar/baz, but /path/foobar is. */
2608 int f_name_has_prefix(const struct file_struct *f1, const struct file_struct *f2)
2609 {
2610         found_prefix = 0;
2611         f_name_cmp(f1, f2);
2612         return found_prefix;
2613 }
2614
2615 char *f_name_buf(void)
2616 {
2617         static char names[5][MAXPATHLEN];
2618         static unsigned int n;
2619
2620         n = (n + 1) % (sizeof names / sizeof names[0]);
2621
2622         return names[n];
2623 }
2624
2625 /* Return a copy of the full filename of a flist entry, using the indicated
2626  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
2627  * done because we checked the size when creating the file_struct entry.
2628  */
2629 char *f_name(const struct file_struct *f, char *fbuf)
2630 {
2631         if (!f || !F_IS_ACTIVE(f))
2632                 return NULL;
2633
2634         if (!fbuf)
2635                 fbuf = f_name_buf();
2636
2637         if (f->dirname) {
2638                 int len = strlen(f->dirname);
2639                 memcpy(fbuf, f->dirname, len);
2640                 fbuf[len] = '/';
2641                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
2642         } else
2643                 strlcpy(fbuf, f->basename, MAXPATHLEN);
2644
2645         return fbuf;
2646 }
2647
2648 /* Do a non-recursive scan of the named directory, possibly ignoring all
2649  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
2650  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
2651  * buffer (the functions we call will append names onto the end, but the old
2652  * dir value will be restored on exit). */
2653 struct file_list *get_dirlist(char *dirname, int dlen, int ignore_filter_rules)
2654 {
2655         struct file_list *dirlist;
2656         char dirbuf[MAXPATHLEN];
2657         int save_recurse = recurse;
2658         int save_xfer_dirs = xfer_dirs;
2659         int save_prune_empty_dirs = prune_empty_dirs;
2660
2661         if (dlen < 0) {
2662                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
2663                 if (dlen >= MAXPATHLEN)
2664                         return NULL;
2665                 dirname = dirbuf;
2666         }
2667
2668         dirlist = flist_new(FLIST_TEMP, "get_dirlist");
2669
2670         recurse = 0;
2671         xfer_dirs = 1;
2672         send_directory(ignore_filter_rules ? -2 : -1, dirlist, dirname, dlen, 0);
2673         xfer_dirs = save_xfer_dirs;
2674         recurse = save_recurse;
2675         if (do_progress)
2676                 flist_count_offset += dirlist->used;
2677
2678         prune_empty_dirs = 0;
2679         dirlist->sorted = dirlist->files;
2680         clean_flist(dirlist, 0);
2681         prune_empty_dirs = save_prune_empty_dirs;
2682
2683         if (verbose > 3)
2684                 output_flist(dirlist);
2685
2686         return dirlist;
2687 }