flist.c

   1 /*
   2  * Generate and receive file lists.
   3  *
   4  * Copyright (C) 1996 Andrew Tridgell
   5  * Copyright (C) 1996 Paul Mackerras
   6  * Copyright (C) 2001, 2002 Martin Pool <mbp@samba.org>
   7  * Copyright (C) 2002-2007 Wayne Davison
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 3 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, visit the http://fsf.org website.
  21  */
  22
  23 #include "rsync.h"
  24 #include "rounding.h"
  25 #include "io.h"
  26
  27 extern int verbose;
  28 extern int list_only;
  29 extern int am_root;
  30 extern int am_server;
  31 extern int am_daemon;
  32 extern int am_sender;
  33 extern int am_generator;
  34 extern int inc_recurse;
  35 extern int do_progress;
  36 extern int always_checksum;
  37 extern int module_id;
  38 extern int ignore_errors;
  39 extern int numeric_ids;
  40 extern int recurse;
  41 extern int use_qsort;
  42 extern int xfer_dirs;
  43 extern int filesfrom_fd;
  44 extern int one_file_system;
  45 extern int copy_dirlinks;
  46 extern int keep_dirlinks;
  47 extern int preserve_acls;
  48 extern int preserve_xattrs;
  49 extern int preserve_links;
  50 extern int preserve_hard_links;
  51 extern int preserve_devices;
  52 extern int preserve_specials;
  53 extern int uid_ndx;
  54 extern int gid_ndx;
  55 extern int eol_nulls;
  56 extern int relative_paths;
  57 extern int implied_dirs;
  58 extern int file_extra_cnt;
  59 extern int ignore_perishable;
  60 extern int non_perishable_cnt;
  61 extern int prune_empty_dirs;
  62 extern int copy_links;
  63 extern int copy_unsafe_links;
  64 extern int protocol_version;
  65 extern int sanitize_paths;
  66 extern struct stats stats;
  67 extern char *filesfrom_host;
  68
  69 extern char curr_dir[MAXPATHLEN];
  70
  71 extern struct chmod_mode_struct *chmod_modes;
  72
  73 extern struct filter_list_struct filter_list;
  74 extern struct filter_list_struct server_filter_list;
  75
  76 #ifdef ICONV_OPTION
  77 extern int ic_ndx;
  78 extern int need_unsorted_flist;
  79 extern iconv_t ic_send, ic_recv;
  80 #endif
  81
  82 #define PTR_SIZE (sizeof (struct file_struct *))
  83
  84 int io_error;
  85 int checksum_len;
  86 dev_t filesystem_dev; /* used to implement -x */
  87
  88 struct file_list *cur_flist, *first_flist, *dir_flist;
  89 int send_dir_ndx = -1, send_dir_depth = 0;
  90 int flist_cnt = 0; /* how many (non-tmp) file list objects exist */
  91 int file_total = 0; /* total of all active items over all file-lists */
  92 int flist_eof = 0; /* all the file-lists are now known */
  93
  94 /* Starting from protocol version 26, we always use 64-bit ino_t and dev_t
  95  * internally, even if this platform does not allow files to have 64-bit inums.
  96  * The only exception is if we're on a platform with no 64-bit type at all.
  97  *
  98  * Because we use read_longint() to get these off the wire, if you transfer
  99  * devices or (for protocols < 30) hardlinks with dev or inum > 2**32 to a
 100  * machine with no 64-bit types then you will get an overflow error.
 101  *
 102  * Note that if you transfer devices from a 64-bit-devt machine (say, Solaris)
 103  * to a 32-bit-devt machine (say, Linux-2.2/x86) then the device numbers will
 104  * be truncated.  But it's a kind of silly thing to do anyhow. */
 105
 106 /* The tmp_* vars are used as a cache area by make_file() to store data
 107  * that the sender doesn't need to remember in its file list.  The data
 108  * will survive just long enough to be used by send_file_entry(). */
 109 static dev_t tmp_rdev;
 110 #ifdef SUPPORT_HARD_LINKS
 111 static int64 tmp_dev, tmp_ino;
 112 #endif
 113 static char tmp_sum[MAX_DIGEST_LEN];
 114
 115 static char empty_sum[MAX_DIGEST_LEN];
 116 static int flist_count_offset; /* for --delete --progress */
 117 static int dir_count = 0;
 118 static int high_hlink_ndx;
 119
 120 static void clean_flist(struct file_list *flist, int strip_root);
 121 static void output_flist(struct file_list *flist);
 122
 123 void init_flist(void)
 124 {
 125         if (verbose > 4) {
 126                 rprintf(FINFO, "FILE_STRUCT_LEN=%d, EXTRA_LEN=%d\n",
 127                         (int)FILE_STRUCT_LEN, (int)EXTRA_LEN);
 128         }
 129         checksum_len = protocol_version < 21 ? 2
 130                      : protocol_version < 30 ? MD4_DIGEST_LEN
 131                      : MD5_DIGEST_LEN;
 132 }
 133
 134 static int show_filelist_p(void)
 135 {
 136         return verbose && xfer_dirs && !am_server && !inc_recurse;
 137 }
 138
 139 static void start_filelist_progress(char *kind)
 140 {
 141         rprintf(FCLIENT, "%s ... ", kind);
 142         if (verbose > 1 || do_progress)
 143                 rprintf(FCLIENT, "\n");
 144         rflush(FINFO);
 145 }
 146
 147 static void emit_filelist_progress(int count)
 148 {
 149         rprintf(FCLIENT, " %d files...\r", count);
 150 }
 151
 152 static void maybe_emit_filelist_progress(int count)
 153 {
 154         if (do_progress && show_filelist_p() && (count % 100) == 0)
 155                 emit_filelist_progress(count);
 156 }
 157
 158 static void finish_filelist_progress(const struct file_list *flist)
 159 {
 160         if (do_progress) {
 161                 /* This overwrites the progress line */
 162                 rprintf(FINFO, "%d file%sto consider\n",
 163                         flist->used, flist->used == 1 ? " " : "s ");
 164         } else
 165                 rprintf(FINFO, "done\n");
 166 }
 167
 168 void show_flist_stats(void)
 169 {
 170         /* Nothing yet */
 171 }
 172
 173 static void list_file_entry(struct file_struct *f)
 174 {
 175         char permbuf[PERMSTRING_SIZE];
 176         double len;
 177
 178         if (!F_IS_ACTIVE(f)) {
 179                 /* this can happen if duplicate names were removed */
 180                 return;
 181         }
 182
 183         permstring(permbuf, f->mode);
 184         len = F_LENGTH(f);
 185
 186         /* TODO: indicate '+' if the entry has an ACL. */
 187
 188 #ifdef SUPPORT_LINKS
 189         if (preserve_links && S_ISLNK(f->mode)) {
 190                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
 191                         permbuf, len, timestring(f->modtime),
 192                         f_name(f, NULL), F_SYMLINK(f));
 193         } else
 194 #endif
 195         {
 196                 rprintf(FINFO, "%s %11.0f %s %s\n",
 197                         permbuf, len, timestring(f->modtime),
 198                         f_name(f, NULL));
 199         }
 200 }
 201
 202 /* Stat either a symlink or its referent, depending on the settings of
 203  * copy_links, copy_unsafe_links, etc.  Returns -1 on error, 0 on success.
 204  *
 205  * If path is the name of a symlink, then the linkbuf buffer (which must hold
 206  * MAXPATHLEN chars) will be set to the symlink's target string.
 207  *
 208  * The stat structure pointed to by stp will contain information about the
 209  * link or the referent as appropriate, if they exist. */
 210 static int readlink_stat(const char *path, STRUCT_STAT *stp, char *linkbuf)
 211 {
 212 #ifdef SUPPORT_LINKS
 213         if (link_stat(path, stp, copy_dirlinks) < 0)
 214                 return -1;
 215         if (S_ISLNK(stp->st_mode)) {
 216                 int llen = readlink(path, linkbuf, MAXPATHLEN - 1);
 217                 if (llen < 0)
 218                         return -1;
 219                 linkbuf[llen] = '\0';
 220                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 221                         if (verbose > 1) {
 222                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 223                                         path, linkbuf);
 224                         }
 225                         return x_stat(path, stp, NULL);
 226                 }
 227         }
 228         return 0;
 229 #else
 230         return x_stat(path, stp, NULL);
 231 #endif
 232 }
 233
 234 int link_stat(const char *path, STRUCT_STAT *stp, int follow_dirlinks)
 235 {
 236 #ifdef SUPPORT_LINKS
 237         if (copy_links)
 238                 return x_stat(path, stp, NULL);
 239         if (x_lstat(path, stp, NULL) < 0)
 240                 return -1;
 241         if (follow_dirlinks && S_ISLNK(stp->st_mode)) {
 242                 STRUCT_STAT st;
 243                 if (x_stat(path, &st, NULL) == 0 && S_ISDIR(st.st_mode))
 244                         *stp = st;
 245         }
 246         return 0;
 247 #else
 248         return x_stat(path, stp, NULL);
 249 #endif
 250 }
 251
 252 /* This function is used to check if a file should be included/excluded
 253  * from the list of files based on its name and type etc.  The value of
 254  * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
 255 static int is_excluded(char *fname, int is_dir, int filter_level)
 256 {
 257 #if 0 /* This currently never happens, so avoid a useless compare. */
 258         if (filter_level == NO_FILTERS)
 259                 return 0;
 260 #endif
 261         if (fname) {
 262                 /* never exclude '.', even if somebody does --exclude '*' */
 263                 if (fname[0] == '.' && !fname[1])
 264                         return 0;
 265                 /* Handle the -R version of the '.' dir. */
 266                 if (fname[0] == '/') {
 267                         int len = strlen(fname);
 268                         if (fname[len-1] == '.' && fname[len-2] == '/')
 269                                 return 0;
 270                 }
 271         }
 272         if (server_filter_list.head
 273             && check_filter(&server_filter_list, fname, is_dir) < 0)
 274                 return 1;
 275         if (filter_level != ALL_FILTERS)
 276                 return 0;
 277         if (filter_list.head
 278             && check_filter(&filter_list, fname, is_dir) < 0)
 279                 return 1;
 280         return 0;
 281 }
 282
 283 static void send_directory(int f, struct file_list *flist,
 284                            char *fbuf, int len, int flags);
 285
 286 static const char *pathname, *orig_dir;
 287 static int pathname_len;
 288
 289
 290 /* Make sure flist can hold at least flist->used + extra entries. */
 291 static void flist_expand(struct file_list *flist, int extra)
 292 {
 293         struct file_struct **new_ptr;
 294
 295         if (flist->used + extra <= flist->malloced)
 296                 return;
 297
 298         if (flist->malloced < FLIST_START)
 299                 flist->malloced = FLIST_START;
 300         else if (flist->malloced >= FLIST_LINEAR)
 301                 flist->malloced += FLIST_LINEAR;
 302         else
 303                 flist->malloced *= 2;
 304
 305         /* In case count jumped or we are starting the list
 306          * with a known size just set it. */
 307         if (flist->malloced < flist->used + extra)
 308                 flist->malloced = flist->used + extra;
 309
 310         new_ptr = realloc_array(flist->files, struct file_struct *,
 311                                 flist->malloced);
 312
 313         if (verbose >= 2 && flist->malloced != FLIST_START) {
 314                 rprintf(FCLIENT, "[%s] expand file_list pointer array to %.0f bytes, did%s move\n",
 315                     who_am_i(),
 316                     (double)sizeof flist->files[0] * flist->malloced,
 317                     (new_ptr == flist->files) ? " not" : "");
 318         }
 319
 320         flist->files = new_ptr;
 321
 322         if (!flist->files)
 323                 out_of_memory("flist_expand");
 324 }
 325
 326 static void flist_done_allocating(struct file_list *flist)
 327 {
 328         void *ptr = pool_boundary(flist->file_pool, 8*1024);
 329         if (flist->pool_boundary == ptr)
 330                 flist->pool_boundary = NULL; /* list didn't use any pool memory */
 331         else
 332                 flist->pool_boundary = ptr;
 333 }
 334
 335 int push_pathname(const char *dir, int len)
 336 {
 337         if (dir == pathname)
 338                 return 1;
 339
 340         if (!orig_dir)
 341                 orig_dir = strdup(curr_dir);
 342
 343         if (pathname && !pop_dir(orig_dir)) {
 344                 rsyserr(FERROR, errno, "pop_dir %s failed",
 345                         full_fname(orig_dir));
 346                 exit_cleanup(RERR_FILESELECT);
 347         }
 348
 349         if (dir && !push_dir(dir, 0)) {
 350                 io_error |= IOERR_GENERAL;
 351                 rsyserr(FERROR, errno, "push_dir %s failed in %s",
 352                         full_fname(dir), curr_dir);
 353                 return 0;
 354         }
 355
 356         pathname = dir;
 357         pathname_len = len >= 0 ? len : dir ? (int)strlen(dir) : 0;
 358
 359         return 1;
 360 }
 361
 362 static void send_file_entry(int f, struct file_struct *file, int ndx, int first_ndx)
 363 {
 364         static time_t modtime;
 365         static mode_t mode;
 366         static int64 dev;
 367         static dev_t rdev;
 368         static uint32 rdev_major;
 369         static uid_t uid;
 370         static gid_t gid;
 371         static char *user_name, *group_name;
 372         static char lastname[MAXPATHLEN];
 373         char fname[MAXPATHLEN];
 374         int first_hlink_ndx = -1;
 375         int l1, l2;
 376         int xflags;
 377
 378 #ifdef ICONV_OPTION
 379         if (ic_send != (iconv_t)-1) {
 380                 ICONV_CONST char *ibuf;
 381                 char *obuf = fname;
 382                 size_t ocnt = MAXPATHLEN, icnt;
 383
 384                 iconv(ic_send, NULL,0, NULL,0);
 385                 if ((ibuf = (ICONV_CONST char *)file->dirname) != NULL) {
 386                     icnt = strlen(ibuf);
 387                     ocnt--; /* pre-subtract the space for the '/' */
 388                     if (iconv(ic_send, &ibuf,&icnt, &obuf,&ocnt) == (size_t)-1)
 389                         goto convert_error;
 390                     *obuf++ = '/';
 391                 }
 392
 393                 ibuf = (ICONV_CONST char *)file->basename;
 394                 icnt = strlen(ibuf);
 395                 if (iconv(ic_send, &ibuf,&icnt, &obuf,&ocnt) == (size_t)-1) {
 396                   convert_error:
 397                         io_error |= IOERR_GENERAL;
 398                         rprintf(FINFO,
 399                             "[%s] cannot convert filename: %s (%s)\n",
 400                             who_am_i(), f_name(file, fname), strerror(errno));
 401                         return;
 402                 }
 403                 *obuf = '\0';
 404         } else
 405 #endif
 406                 f_name(file, fname);
 407
 408         xflags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */
 409
 410         if (file->mode == mode)
 411                 xflags |= XMIT_SAME_MODE;
 412         else
 413                 mode = file->mode;
 414
 415         if (protocol_version >= 30 && S_ISDIR(mode) && !(file->flags & FLAG_XFER_DIR))
 416                 xflags |= XMIT_NON_XFER_DIR;
 417
 418         if ((preserve_devices && IS_DEVICE(mode))
 419          || (preserve_specials && IS_SPECIAL(mode))) {
 420                 if (protocol_version < 28) {
 421                         if (tmp_rdev == rdev)
 422                                 xflags |= XMIT_SAME_RDEV_pre28;
 423                         else
 424                                 rdev = tmp_rdev;
 425                 } else {
 426                         rdev = tmp_rdev;
 427                         if ((uint32)major(rdev) == rdev_major)
 428                                 xflags |= XMIT_SAME_RDEV_MAJOR;
 429                         else
 430                                 rdev_major = major(rdev);
 431                         if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu)
 432                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
 433                 }
 434         } else if (protocol_version < 28)
 435                 rdev = MAKEDEV(0, 0);
 436         if (uid_ndx) {
 437                 if ((uid_t)F_OWNER(file) == uid && *lastname)
 438                         xflags |= XMIT_SAME_UID;
 439                 else {
 440                         uid = F_OWNER(file);
 441                         if (uid_ndx && !numeric_ids) {
 442                                 user_name = add_uid(uid);
 443                                 if (inc_recurse && user_name)
 444                                         xflags |= XMIT_USER_NAME_FOLLOWS;
 445                         }
 446                 }
 447         }
 448         if (gid_ndx) {
 449                 if ((gid_t)F_GROUP(file) == gid && *lastname)
 450                         xflags |= XMIT_SAME_GID;
 451                 else {
 452                         gid = F_GROUP(file);
 453                         if (gid_ndx && !numeric_ids) {
 454                                 group_name = add_gid(gid);
 455                                 if (inc_recurse && group_name)
 456                                         xflags |= XMIT_GROUP_NAME_FOLLOWS;
 457                         }
 458                 }
 459         }
 460         if (file->modtime == modtime)
 461                 xflags |= XMIT_SAME_TIME;
 462         else
 463                 modtime = file->modtime;
 464
 465 #ifdef SUPPORT_HARD_LINKS
 466         if (tmp_dev != 0) {
 467                 if (protocol_version >= 30) {
 468                         struct ht_int64_node *np = idev_find(tmp_dev, tmp_ino);
 469                         first_hlink_ndx = (int32)(long)np->data - 1;
 470                         if (first_hlink_ndx < 0) {
 471                                 high_hlink_ndx = ndx + first_ndx;
 472                                 np->data = (void*)(long)(high_hlink_ndx + 1);
 473                                 xflags |= XMIT_HLINK_FIRST;
 474                         }
 475                         xflags |= XMIT_HLINKED;
 476                 } else {
 477                         if (tmp_dev == dev) {
 478                                 if (protocol_version >= 28)
 479                                         xflags |= XMIT_SAME_DEV_pre30;
 480                         } else
 481                                 dev = tmp_dev;
 482                         xflags |= XMIT_HLINKED;
 483                 }
 484         }
 485 #endif
 486
 487         for (l1 = 0;
 488             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 489             l1++) {}
 490         l2 = strlen(fname+l1);
 491
 492         if (l1 > 0)
 493                 xflags |= XMIT_SAME_NAME;
 494         if (l2 > 255)
 495                 xflags |= XMIT_LONG_NAME;
 496
 497         /* We must make sure we don't send a zero flag byte or the
 498          * other end will terminate the flist transfer.  Note that
 499          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 500          * it's harmless way to add a bit to the first flag byte. */
 501         if (protocol_version >= 28) {
 502                 if (!xflags && !S_ISDIR(mode))
 503                         xflags |= XMIT_TOP_DIR;
 504                 if ((xflags & 0xFF00) || !xflags) {
 505                         xflags |= XMIT_EXTENDED_FLAGS;
 506                         write_shortint(f, xflags);
 507                 } else
 508                         write_byte(f, xflags);
 509         } else {
 510                 if (!(xflags & 0xFF))
 511                         xflags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
 512                 write_byte(f, xflags);
 513         }
 514         if (xflags & XMIT_SAME_NAME)
 515                 write_byte(f, l1);
 516         if (xflags & XMIT_LONG_NAME)
 517                 write_varint30(f, l2);
 518         else
 519                 write_byte(f, l2);
 520         write_buf(f, fname + l1, l2);
 521
 522         if (first_hlink_ndx >= 0) {
 523                 write_varint(f, first_hlink_ndx);
 524                 if (first_hlink_ndx >= first_ndx)
 525                         goto the_end;
 526         }
 527
 528         write_varlong30(f, F_LENGTH(file), 3);
 529         if (!(xflags & XMIT_SAME_TIME)) {
 530                 if (protocol_version >= 30)
 531                         write_varlong(f, modtime, 4);
 532                 else
 533                         write_int(f, modtime);
 534         }
 535         if (!(xflags & XMIT_SAME_MODE))
 536                 write_int(f, to_wire_mode(mode));
 537         if (uid_ndx && !(xflags & XMIT_SAME_UID)) {
 538                 if (protocol_version < 30)
 539                         write_int(f, uid);
 540                 else {
 541                         write_varint(f, uid);
 542                         if (xflags & XMIT_USER_NAME_FOLLOWS) {
 543                                 int len = strlen(user_name);
 544                                 write_byte(f, len);
 545                                 write_buf(f, user_name, len);
 546                         }
 547                 }
 548         }
 549         if (gid_ndx && !(xflags & XMIT_SAME_GID)) {
 550                 if (protocol_version < 30)
 551                         write_int(f, gid);
 552                 else {
 553                         write_varint(f, gid);
 554                         if (xflags & XMIT_GROUP_NAME_FOLLOWS) {
 555                                 int len = strlen(group_name);
 556                                 write_byte(f, len);
 557                                 write_buf(f, group_name, len);
 558                         }
 559                 }
 560         }
 561         if ((preserve_devices && IS_DEVICE(mode))
 562          || (preserve_specials && IS_SPECIAL(mode))) {
 563                 if (protocol_version < 28) {
 564                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 565                                 write_int(f, (int)rdev);
 566                 } else {
 567                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 568                                 write_varint30(f, major(rdev));
 569                         if (protocol_version >= 30)
 570                                 write_varint(f, minor(rdev));
 571                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 572                                 write_byte(f, minor(rdev));
 573                         else
 574                                 write_int(f, minor(rdev));
 575                 }
 576         }
 577
 578 #ifdef SUPPORT_LINKS
 579         if (preserve_links && S_ISLNK(mode)) {
 580                 const char *sl = F_SYMLINK(file);
 581                 int len = strlen(sl);
 582                 write_varint30(f, len);
 583                 write_buf(f, sl, len);
 584         }
 585 #endif
 586
 587 #ifdef SUPPORT_HARD_LINKS
 588         if (tmp_dev != 0 && protocol_version < 30) {
 589                 if (protocol_version < 26) {
 590                         /* 32-bit dev_t and ino_t */
 591                         write_int(f, (int32)dev);
 592                         write_int(f, (int32)tmp_ino);
 593                 } else {
 594                         /* 64-bit dev_t and ino_t */
 595                         if (!(xflags & XMIT_SAME_DEV_pre30))
 596                                 write_longint(f, dev);
 597                         write_longint(f, tmp_ino);
 598                 }
 599         }
 600 #endif
 601
 602         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 603                 const char *sum;
 604                 if (S_ISREG(mode))
 605                         sum = tmp_sum;
 606                 else {
 607                         /* Prior to 28, we sent a useless set of nulls. */
 608                         sum = empty_sum;
 609                 }
 610                 write_buf(f, sum, checksum_len);
 611         }
 612
 613   the_end:
 614         strlcpy(lastname, fname, MAXPATHLEN);
 615
 616         if (S_ISREG(mode) || S_ISLNK(mode))
 617                 stats.total_size += F_LENGTH(file);
 618 }
 619
 620 static struct file_struct *recv_file_entry(struct file_list *flist,
 621                                            int xflags, int f)
 622 {
 623         static int64 modtime;
 624         static mode_t mode;
 625         static int64 dev;
 626         static dev_t rdev;
 627         static uint32 rdev_major;
 628         static uid_t uid;
 629         static gid_t gid;
 630         static uint16 gid_flags;
 631         static char lastname[MAXPATHLEN], *lastdir;
 632         static int lastdir_depth, lastdir_len = -1;
 633         static unsigned int del_hier_name_len = 0;
 634         static int in_del_hier = 0;
 635         char thisname[MAXPATHLEN];
 636         unsigned int l1 = 0, l2 = 0;
 637         int alloc_len, basename_len, linkname_len;
 638         int extra_len = file_extra_cnt * EXTRA_LEN;
 639         int first_hlink_ndx = -1;
 640         OFF_T file_length;
 641         const char *basename;
 642         struct file_struct *file;
 643         alloc_pool_t *pool;
 644         char *bp;
 645
 646         if (xflags & XMIT_SAME_NAME)
 647                 l1 = read_byte(f);
 648
 649         if (xflags & XMIT_LONG_NAME)
 650                 l2 = read_varint30(f);
 651         else
 652                 l2 = read_byte(f);
 653
 654         if (l2 >= MAXPATHLEN - l1) {
 655                 rprintf(FERROR,
 656                         "overflow: xflags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
 657                         xflags, l1, l2, lastname, who_am_i());
 658                 overflow_exit("recv_file_entry");
 659         }
 660
 661         strlcpy(thisname, lastname, l1 + 1);
 662         read_sbuf(f, &thisname[l1], l2);
 663         thisname[l1 + l2] = 0;
 664
 665         /* Abuse basename_len for a moment... */
 666         basename_len = strlcpy(lastname, thisname, MAXPATHLEN);
 667
 668 #ifdef ICONV_OPTION
 669         if (ic_recv != (iconv_t)-1) {
 670                 char *obuf = thisname;
 671                 ICONV_CONST char *ibuf = (ICONV_CONST char *)lastname;
 672                 size_t ocnt = MAXPATHLEN, icnt = basename_len;
 673
 674                 if (icnt >= MAXPATHLEN) {
 675                         errno = E2BIG;
 676                         goto convert_error;
 677                 }
 678
 679                 iconv(ic_recv, NULL,0, NULL,0);
 680                 if (iconv(ic_recv, &ibuf,&icnt, &obuf,&ocnt) == (size_t)-1) {
 681                   convert_error:
 682                         io_error |= IOERR_GENERAL;
 683                         rprintf(FINFO,
 684                             "[%s] cannot convert filename: %s (%s)\n",
 685                             who_am_i(), lastname, strerror(errno));
 686                         obuf = thisname;
 687                 }
 688                 *obuf = '\0';
 689         }
 690 #endif
 691
 692         clean_fname(thisname, 0);
 693
 694         if (sanitize_paths)
 695                 sanitize_path(thisname, thisname, "", 0, NULL);
 696
 697         if ((basename = strrchr(thisname, '/')) != NULL) {
 698                 int len = basename++ - thisname;
 699                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
 700                         lastdir = new_array(char, len + 1);
 701                         memcpy(lastdir, thisname, len);
 702                         lastdir[len] = '\0';
 703                         lastdir_len = len;
 704                         lastdir_depth = count_dir_elements(lastdir);
 705                 }
 706         } else
 707                 basename = thisname;
 708         basename_len = strlen(basename) + 1; /* count the '\0' */
 709
 710 #ifdef SUPPORT_HARD_LINKS
 711         if (protocol_version >= 30
 712          && BITS_SETnUNSET(xflags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
 713                 first_hlink_ndx = read_varint(f);
 714                 if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->ndx_start + flist->used) {
 715                         rprintf(FERROR,
 716                                 "hard-link reference out of range: %d (%d)\n",
 717                                 first_hlink_ndx, flist->ndx_start + flist->used);
 718                         exit_cleanup(RERR_PROTOCOL);
 719                 }
 720                 if (first_hlink_ndx >= flist->ndx_start) {
 721                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 722                         file_length = F_LENGTH(first);
 723                         modtime = first->modtime;
 724                         mode = first->mode;
 725                         if (uid_ndx)
 726                                 uid = F_OWNER(first);
 727                         if (gid_ndx)
 728                                 gid = F_GROUP(first);
 729                         if ((preserve_devices && IS_DEVICE(mode))
 730                          || (preserve_specials && IS_SPECIAL(mode))) {
 731                                 uint32 *devp = F_RDEV_P(first);
 732                                 rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
 733                                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 734                         }
 735                         if (preserve_links && S_ISLNK(mode))
 736                                 linkname_len = strlen(F_SYMLINK(first)) + 1;
 737                         else
 738                                 linkname_len = 0;
 739                         goto create_object;
 740                 }
 741         }
 742 #endif
 743
 744         file_length = read_varlong30(f, 3);
 745         if (!(xflags & XMIT_SAME_TIME)) {
 746                 if (protocol_version >= 30) {
 747                         modtime = read_varlong(f, 4);
 748 #if SIZEOF_TIME_T < SIZEOF_INT64
 749                         if ((modtime > INT_MAX || modtime < INT_MIN) && !am_generator) {
 750                                 rprintf(FERROR,
 751                                     "Time value of %s truncated on receiver.\n",
 752                                     lastname);
 753                         }
 754 #endif
 755                 } else
 756                         modtime = read_int(f);
 757         }
 758         if (!(xflags & XMIT_SAME_MODE))
 759                 mode = from_wire_mode(read_int(f));
 760
 761         if (chmod_modes && !S_ISLNK(mode))
 762                 mode = tweak_mode(mode, chmod_modes);
 763
 764         if (uid_ndx && !(xflags & XMIT_SAME_UID)) {
 765                 if (protocol_version < 30)
 766                         uid = (uid_t)read_int(f);
 767                 else {
 768                         uid = (uid_t)read_varint(f);
 769                         if (xflags & XMIT_USER_NAME_FOLLOWS)
 770                                 uid = recv_user_name(f, uid);
 771                         else if (inc_recurse && am_root && !numeric_ids)
 772                                 uid = match_uid(uid);
 773                 }
 774         }
 775         if (gid_ndx && !(xflags & XMIT_SAME_GID)) {
 776                 if (protocol_version < 30)
 777                         gid = (gid_t)read_int(f);
 778                 else {
 779                         gid = (gid_t)read_varint(f);
 780                         gid_flags = 0;
 781                         if (xflags & XMIT_GROUP_NAME_FOLLOWS)
 782                                 gid = recv_group_name(f, gid, &gid_flags);
 783                         else if (inc_recurse && (!am_root || !numeric_ids))
 784                                 gid = match_gid(gid, &gid_flags);
 785                 }
 786         }
 787
 788         if ((preserve_devices && IS_DEVICE(mode))
 789          || (preserve_specials && IS_SPECIAL(mode))) {
 790                 if (protocol_version < 28) {
 791                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 792                                 rdev = (dev_t)read_int(f);
 793                 } else {
 794                         uint32 rdev_minor;
 795                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 796                                 rdev_major = read_varint30(f);
 797                         if (protocol_version >= 30)
 798                                 rdev_minor = read_varint(f);
 799                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 800                                 rdev_minor = read_byte(f);
 801                         else
 802                                 rdev_minor = read_int(f);
 803                         rdev = MAKEDEV(rdev_major, rdev_minor);
 804                 }
 805                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 806                 file_length = 0;
 807         } else if (protocol_version < 28)
 808                 rdev = MAKEDEV(0, 0);
 809
 810 #ifdef SUPPORT_LINKS
 811         if (preserve_links && S_ISLNK(mode)) {
 812                 linkname_len = read_varint30(f) + 1; /* count the '\0' */
 813                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 814                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 815                                 linkname_len - 1);
 816                         overflow_exit("recv_file_entry");
 817                 }
 818         }
 819         else
 820 #endif
 821                 linkname_len = 0;
 822
 823 #ifdef SUPPORT_HARD_LINKS
 824   create_object:
 825         if (preserve_hard_links) {
 826                 if (protocol_version < 28 && S_ISREG(mode))
 827                         xflags |= XMIT_HLINKED;
 828                 if (xflags & XMIT_HLINKED)
 829                         extra_len += (inc_recurse+1) * EXTRA_LEN;
 830         }
 831 #endif
 832
 833 #ifdef SUPPORT_ACLS
 834         /* We need one or two index int32s when we're preserving ACLs. */
 835         if (preserve_acls)
 836                 extra_len += (S_ISDIR(mode) ? 2 : 1) * EXTRA_LEN;
 837 #endif
 838
 839         if (always_checksum && S_ISREG(mode))
 840                 extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
 841
 842         if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
 843                 extra_len += EXTRA_LEN;
 844
 845 #if EXTRA_ROUNDING > 0
 846         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
 847                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
 848 #endif
 849
 850         if (inc_recurse && S_ISDIR(mode)) {
 851                 if (one_file_system) {
 852                         /* Room to save the dir's device for -x */
 853                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 854                 }
 855                 pool = dir_flist->file_pool;
 856         } else
 857                 pool = flist->file_pool;
 858
 859         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
 860                   + linkname_len;
 861         bp = pool_alloc(pool, alloc_len, "recv_file_entry");
 862
 863         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
 864         bp += extra_len;
 865         file = (struct file_struct *)bp;
 866         bp += FILE_STRUCT_LEN;
 867
 868         memcpy(bp, basename, basename_len);
 869         bp += basename_len + linkname_len; /* skip space for symlink too */
 870
 871 #ifdef SUPPORT_HARD_LINKS
 872         if (xflags & XMIT_HLINKED)
 873                 file->flags |= FLAG_HLINKED;
 874 #endif
 875         file->modtime = (time_t)modtime;
 876         file->len32 = (uint32)file_length;
 877         if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
 878                 file->flags |= FLAG_LENGTH64;
 879                 OPT_EXTRA(file, 0)->unum = (uint32)(file_length >> 32);
 880         }
 881         file->mode = mode;
 882         if (uid_ndx)
 883                 F_OWNER(file) = uid;
 884         if (gid_ndx) {
 885                 F_GROUP(file) = gid;
 886                 file->flags |= gid_flags;
 887         }
 888 #ifdef ICONV_OPTION
 889         if (ic_ndx)
 890                 F_NDX(file) = flist->used + flist->ndx_start;
 891 #endif
 892
 893         if (basename != thisname) {
 894                 file->dirname = lastdir;
 895                 F_DEPTH(file) = lastdir_depth + 1;
 896         } else
 897                 F_DEPTH(file) = 1;
 898
 899         if (S_ISDIR(mode)) {
 900                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
 901                         F_DEPTH(file)--;
 902                 if (xflags & XMIT_TOP_DIR) {
 903                         in_del_hier = recurse;
 904                         del_hier_name_len = F_DEPTH(file) == 0 ? 0 : l1 + l2;
 905                         if (relative_paths && del_hier_name_len > 2
 906                             && lastname[del_hier_name_len-1] == '.'
 907                             && lastname[del_hier_name_len-2] == '/')
 908                                 del_hier_name_len -= 2;
 909                         file->flags |= FLAG_TOP_DIR | FLAG_XFER_DIR;
 910                 } else if (protocol_version >= 30) {
 911                         if (!(xflags & XMIT_NON_XFER_DIR))
 912                                 file->flags |= FLAG_XFER_DIR;
 913                 } else if (in_del_hier) {
 914                         if (!relative_paths || !del_hier_name_len
 915                          || (l1 >= del_hier_name_len
 916                           && lastname[del_hier_name_len] == '/'))
 917                                 file->flags |= FLAG_XFER_DIR;
 918                         else
 919                                 in_del_hier = 0;
 920                 }
 921         }
 922
 923         if ((preserve_devices && IS_DEVICE(mode))
 924          || (preserve_specials && IS_SPECIAL(mode))) {
 925                 uint32 *devp = F_RDEV_P(file);
 926                 DEV_MAJOR(devp) = major(rdev);
 927                 DEV_MINOR(devp) = minor(rdev);
 928         }
 929
 930 #ifdef SUPPORT_LINKS
 931         if (linkname_len) {
 932                 bp = (char*)file->basename + basename_len;
 933                 if (first_hlink_ndx >= flist->ndx_start) {
 934                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 935                         memcpy(bp, F_SYMLINK(first), linkname_len);
 936                 } else
 937                         read_sbuf(f, bp, linkname_len - 1);
 938                 if (sanitize_paths)
 939                         sanitize_path(bp, bp, "", lastdir_depth, NULL);
 940         }
 941 #endif
 942
 943 #ifdef SUPPORT_HARD_LINKS
 944         if (preserve_hard_links && xflags & XMIT_HLINKED) {
 945                 if (protocol_version >= 30) {
 946                         if (xflags & XMIT_HLINK_FIRST) {
 947                                 high_hlink_ndx = flist->ndx_start + flist->used;
 948                                 F_HL_GNUM(file) = high_hlink_ndx;
 949                         } else
 950                                 F_HL_GNUM(file) = first_hlink_ndx;
 951                 } else {
 952                         static int32 cnt = 0;
 953                         struct ht_int64_node *np;
 954                         int64 ino;
 955                         int32 ndx;
 956                         if (protocol_version < 26) {
 957                                 dev = read_int(f);
 958                                 ino = read_int(f);
 959                         } else {
 960                                 if (!(xflags & XMIT_SAME_DEV_pre30))
 961                                         dev = read_longint(f);
 962                                 ino = read_longint(f);
 963                         }
 964                         np = idev_find(dev, ino);
 965                         ndx = (int32)(long)np->data - 1;
 966                         if (ndx < 0) {
 967                                 ndx = cnt++;
 968                                 np->data = (void*)(long)cnt;
 969                         }
 970                         F_HL_GNUM(file) = ndx;
 971                 }
 972         }
 973 #endif
 974
 975         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 976                 if (S_ISREG(mode))
 977                         bp = F_SUM(file);
 978                 else {
 979                         /* Prior to 28, we get a useless set of nulls. */
 980                         bp = tmp_sum;
 981                 }
 982                 if (first_hlink_ndx >= flist->ndx_start) {
 983                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 984                         memcpy(bp, F_SUM(first), checksum_len);
 985                 } else
 986                         read_buf(f, bp, checksum_len);
 987         }
 988
 989 #ifdef SUPPORT_ACLS
 990         if (preserve_acls && !S_ISLNK(mode))
 991                 receive_acl(file, f);
 992 #endif
 993 #ifdef SUPPORT_XATTRS
 994         if (preserve_xattrs)
 995                 receive_xattr(file, f );
 996 #endif
 997
 998         if (S_ISREG(mode) || S_ISLNK(mode))
 999                 stats.total_size += file_length;
1000
1001         return file;
1002 }
1003
1004 /* Create a file_struct for a named file by reading its stat() information
1005  * and performing extensive checks against global options.
1006  *
1007  * Returns a pointer to the new file struct, or NULL if there was an error
1008  * or this file should be excluded. */
1009 struct file_struct *make_file(const char *fname, struct file_list *flist,
1010                               STRUCT_STAT *stp, int flags, int filter_level)
1011 {
1012         static char *lastdir;
1013         static int lastdir_len = -1;
1014         struct file_struct *file;
1015         char thisname[MAXPATHLEN];
1016         char linkname[MAXPATHLEN];
1017         int alloc_len, basename_len, linkname_len;
1018         int extra_len = file_extra_cnt * EXTRA_LEN;
1019         const char *basename;
1020         alloc_pool_t *pool;
1021         STRUCT_STAT st;
1022         char *bp;
1023
1024         if (strlcpy(thisname, fname, sizeof thisname) >= sizeof thisname) {
1025                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
1026                 return NULL;
1027         }
1028         clean_fname(thisname, 0);
1029         if (sanitize_paths)
1030                 sanitize_path(thisname, thisname, "", 0, NULL);
1031
1032         if (stp && S_ISDIR(stp->st_mode)) {
1033                 st = *stp; /* Needed for "symlink/." with --relative. */
1034                 *linkname = '\0'; /* make IBM code checker happy */
1035         } else if (readlink_stat(thisname, &st, linkname) != 0) {
1036                 int save_errno = errno;
1037                 /* See if file is excluded before reporting an error. */
1038                 if (filter_level != NO_FILTERS
1039                  && (is_excluded(thisname, 0, filter_level)
1040                   || is_excluded(thisname, 1, filter_level))) {
1041                         if (ignore_perishable && save_errno != ENOENT)
1042                                 non_perishable_cnt++;
1043                         return NULL;
1044                 }
1045                 if (save_errno == ENOENT) {
1046 #ifdef SUPPORT_LINKS
1047                         /* Avoid "vanished" error if symlink points nowhere. */
1048                         if (copy_links && x_lstat(thisname, &st, NULL) == 0
1049                             && S_ISLNK(st.st_mode)) {
1050                                 io_error |= IOERR_GENERAL;
1051                                 rprintf(FERROR, "symlink has no referent: %s\n",
1052                                         full_fname(thisname));
1053                         } else
1054 #endif
1055                         {
1056                                 enum logcode c = am_daemon && protocol_version < 28
1057                                     ? FERROR : FINFO;
1058                                 io_error |= IOERR_VANISHED;
1059                                 rprintf(c, "file has vanished: %s\n",
1060                                         full_fname(thisname));
1061                         }
1062                 } else {
1063                         io_error |= IOERR_GENERAL;
1064                         rsyserr(FERROR, save_errno, "readlink %s failed",
1065                                 full_fname(thisname));
1066                 }
1067                 return NULL;
1068         }
1069
1070         /* backup.c calls us with filter_level set to NO_FILTERS. */
1071         if (filter_level == NO_FILTERS)
1072                 goto skip_filters;
1073
1074         if (S_ISDIR(st.st_mode)) {
1075                 if (!xfer_dirs) {
1076                         rprintf(FINFO, "skipping directory %s\n", thisname);
1077                         return NULL;
1078                 }
1079         } else
1080                 flags &= ~FLAG_XFER_DIR;
1081
1082         /* -x only affects directories because we need to avoid recursing
1083          * into a mount-point directory, not to avoid copying a symlinked
1084          * file if -L (or similar) was specified. */
1085         if (one_file_system && st.st_dev != filesystem_dev
1086          && S_ISDIR(st.st_mode)) {
1087                 if (one_file_system > 1) {
1088                         if (verbose > 2) {
1089                                 rprintf(FINFO, "skipping mount-point dir %s\n",
1090                                         thisname);
1091                         }
1092                         return NULL;
1093                 }
1094                 flags |= FLAG_MOUNT_DIR;
1095         }
1096
1097         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level)) {
1098                 if (ignore_perishable)
1099                         non_perishable_cnt++;
1100                 return NULL;
1101         }
1102
1103         if (lp_ignore_nonreadable(module_id)) {
1104 #ifdef SUPPORT_LINKS
1105                 if (!S_ISLNK(st.st_mode))
1106 #endif
1107                         if (access(thisname, R_OK) != 0)
1108                                 return NULL;
1109         }
1110
1111   skip_filters:
1112
1113         /* Only divert a directory in the main transfer. */
1114         if (flist) {
1115                 if (flist->prev && S_ISDIR(st.st_mode)
1116                  && flags & FLAG_DIVERT_DIRS) {
1117                         /* Room for parent/sibling/next-child info. */
1118                         extra_len += DIRNODE_EXTRA_CNT * EXTRA_LEN;
1119                         dir_count++;
1120                         pool = dir_flist->file_pool;
1121                 } else
1122                         pool = flist->file_pool;
1123         } else
1124                 pool = NULL;
1125
1126         if (verbose > 2) {
1127                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
1128                         who_am_i(), thisname, filter_level);
1129         }
1130
1131         if ((basename = strrchr(thisname, '/')) != NULL) {
1132                 int len = basename++ - thisname;
1133                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
1134                         lastdir = new_array(char, len + 1);
1135                         memcpy(lastdir, thisname, len);
1136                         lastdir[len] = '\0';
1137                         lastdir_len = len;
1138                 }
1139         } else
1140                 basename = thisname;
1141         basename_len = strlen(basename) + 1; /* count the '\0' */
1142
1143 #ifdef SUPPORT_LINKS
1144         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
1145 #else
1146         linkname_len = 0;
1147 #endif
1148
1149         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
1150                 extra_len += EXTRA_LEN;
1151
1152 #if EXTRA_ROUNDING > 0
1153         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
1154                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
1155 #endif
1156
1157         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
1158                   + linkname_len;
1159         if (pool)
1160                 bp = pool_alloc(pool, alloc_len, "make_file");
1161         else {
1162                 if (!(bp = new_array(char, alloc_len)))
1163                         out_of_memory("make_file");
1164         }
1165
1166         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
1167         bp += extra_len;
1168         file = (struct file_struct *)bp;
1169         bp += FILE_STRUCT_LEN;
1170
1171         memcpy(bp, basename, basename_len);
1172         bp += basename_len + linkname_len; /* skip space for symlink too */
1173
1174 #ifdef SUPPORT_HARD_LINKS
1175         if (preserve_hard_links && flist && flist->prev) {
1176                 if (protocol_version >= 28
1177                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
1178                  : S_ISREG(st.st_mode)) {
1179                         tmp_dev = st.st_dev;
1180                         tmp_ino = st.st_ino;
1181                 } else
1182                         tmp_dev = 0;
1183         }
1184 #endif
1185
1186 #ifdef HAVE_STRUCT_STAT_ST_RDEV
1187         if (IS_DEVICE(st.st_mode) || IS_SPECIAL(st.st_mode)) {
1188                 tmp_rdev = st.st_rdev;
1189                 st.st_size = 0;
1190         }
1191 #endif
1192
1193         file->flags = flags;
1194         file->modtime = st.st_mtime;
1195         file->len32 = (uint32)st.st_size;
1196         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
1197                 file->flags |= FLAG_LENGTH64;
1198                 OPT_EXTRA(file, 0)->unum = (uint32)(st.st_size >> 32);
1199         }
1200         file->mode = st.st_mode;
1201         if (uid_ndx)
1202                 F_OWNER(file) = st.st_uid;
1203         if (gid_ndx)
1204                 F_GROUP(file) = st.st_gid;
1205
1206         if (basename != thisname)
1207                 file->dirname = lastdir;
1208
1209 #ifdef SUPPORT_LINKS
1210         if (linkname_len) {
1211                 bp = (char*)file->basename + basename_len;
1212                 memcpy(bp, linkname, linkname_len);
1213         }
1214 #endif
1215
1216         if (always_checksum && am_sender && S_ISREG(st.st_mode))
1217                 file_checksum(thisname, tmp_sum, st.st_size);
1218
1219         F_PATHNAME(file) = pathname;
1220
1221         /* This code is only used by the receiver when it is building
1222          * a list of files for a delete pass. */
1223         if (keep_dirlinks && linkname_len && flist) {
1224                 STRUCT_STAT st2;
1225                 int save_mode = file->mode;
1226                 file->mode = S_IFDIR; /* Find a directory with our name. */
1227                 if (flist_find(dir_flist, file) >= 0
1228                  && x_stat(thisname, &st2, NULL) == 0 && S_ISDIR(st2.st_mode)) {
1229                         file->modtime = st2.st_mtime;
1230                         file->len32 = 0;
1231                         file->mode = st2.st_mode;
1232                         if (uid_ndx)
1233                                 F_OWNER(file) = st2.st_uid;
1234                         if (gid_ndx)
1235                                 F_GROUP(file) = st2.st_gid;
1236                 } else
1237                         file->mode = save_mode;
1238         }
1239
1240         if (basename_len == 0+1)
1241                 return NULL;
1242
1243 #ifdef ICONV_OPTION
1244         if (ic_ndx)
1245                 F_NDX(file) = dir_count - 1;
1246 #endif
1247
1248         return file;
1249 }
1250
1251 /* Only called for temporary file_struct entries created by make_file(). */
1252 void unmake_file(struct file_struct *file)
1253 {
1254         int extra_cnt = file_extra_cnt + LEN64_BUMP(file);
1255 #if EXTRA_ROUNDING > 0
1256         if (extra_cnt & EXTRA_ROUNDING)
1257                 extra_cnt = (extra_cnt | EXTRA_ROUNDING) + 1;
1258 #endif
1259         free(REQ_EXTRA(file, extra_cnt));
1260 }
1261
1262 static struct file_struct *send_file_name(int f, struct file_list *flist,
1263                                           char *fname, STRUCT_STAT *stp,
1264                                           int flags, int filter_level)
1265 {
1266         struct file_struct *file;
1267 #if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
1268         statx sx;
1269 #endif
1270
1271         file = make_file(fname, flist, stp, flags, filter_level);
1272         if (!file)
1273                 return NULL;
1274
1275         if (chmod_modes && !S_ISLNK(file->mode))
1276                 file->mode = tweak_mode(file->mode, chmod_modes);
1277
1278 #ifdef SUPPORT_ACLS
1279         if (preserve_acls && !S_ISLNK(file->mode) && f >= 0) {
1280                 sx.st.st_mode = file->mode;
1281                 sx.acc_acl = sx.def_acl = NULL;
1282                 if (get_acl(fname, &sx) < 0)
1283                         return NULL;
1284         }
1285 #endif
1286 #ifdef SUPPORT_XATTRS
1287         if (preserve_xattrs && f >= 0) {
1288                 sx.xattr = NULL;
1289                 if (get_xattr(fname, &sx) < 0)
1290                         return NULL;
1291         }
1292 #endif
1293
1294         maybe_emit_filelist_progress(flist->used + flist_count_offset);
1295
1296         flist_expand(flist, 1);
1297         flist->files[flist->used++] = file;
1298         if (f >= 0) {
1299                 send_file_entry(f, file, flist->used - 1, flist->ndx_start);
1300 #ifdef SUPPORT_ACLS
1301                 if (preserve_acls && !S_ISLNK(file->mode)) {
1302                         send_acl(&sx, f);
1303                         free_acl(&sx);
1304                 }
1305 #endif
1306 #ifdef SUPPORT_XATTRS
1307                 if (preserve_xattrs) {
1308                         F_XATTR(file) = send_xattr(&sx, f);
1309                         free_xattr(&sx);
1310                 }
1311 #endif
1312         }
1313         return file;
1314 }
1315
1316 static void send_if_directory(int f, struct file_list *flist,
1317                               struct file_struct *file,
1318                               char *fbuf, unsigned int ol,
1319                               int flags)
1320 {
1321         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1322
1323         if (S_ISDIR(file->mode)
1324             && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) {
1325                 void *save_filters;
1326                 unsigned int len = strlen(fbuf);
1327                 if (len > 1 && fbuf[len-1] == '/')
1328                         fbuf[--len] = '\0';
1329                 if (len >= MAXPATHLEN - 1) {
1330                         io_error |= IOERR_GENERAL;
1331                         rprintf(FERROR, "skipping long-named directory: %s\n",
1332                                 full_fname(fbuf));
1333                         return;
1334                 }
1335                 save_filters = push_local_filters(fbuf, len);
1336                 send_directory(f, flist, fbuf, len, flags);
1337                 pop_local_filters(save_filters);
1338                 fbuf[ol] = '\0';
1339                 if (is_dot_dir)
1340                         fbuf[ol-1] = '.';
1341         }
1342 }
1343
1344 static int file_compare(const void *file1, const void *file2)
1345 {
1346         return f_name_cmp(*(struct file_struct **)file1,
1347                           *(struct file_struct **)file2);
1348 }
1349
1350 /* The guts of a merge-sort algorithm.  This was derived from the glibc
1351  * version, but I (Wayne) changed the merge code to do less copying and
1352  * to require only half the amount of temporary memory. */
1353 static void fsort_tmp(struct file_struct **fp, size_t num,
1354                       struct file_struct **tmp)
1355 {
1356         struct file_struct **f1, **f2, **t;
1357         size_t n1, n2;
1358
1359         n1 = num / 2;
1360         n2 = num - n1;
1361         f1 = fp;
1362         f2 = fp + n1;
1363
1364         if (n1 > 1)
1365                 fsort_tmp(f1, n1, tmp);
1366         if (n2 > 1)
1367                 fsort_tmp(f2, n2, tmp);
1368
1369         while (f_name_cmp(*f1, *f2) <= 0) {
1370                 if (!--n1)
1371                         return;
1372                 f1++;
1373         }
1374
1375         t = tmp;
1376         memcpy(t, f1, n1 * PTR_SIZE);
1377
1378         *f1++ = *f2++, n2--;
1379
1380         while (n1 > 0 && n2 > 0) {
1381                 if (f_name_cmp(*t, *f2) <= 0)
1382                         *f1++ = *t++, n1--;
1383                 else
1384                         *f1++ = *f2++, n2--;
1385         }
1386
1387         if (n1 > 0)
1388                 memcpy(f1, t, n1 * PTR_SIZE);
1389 }
1390
1391 /* This file-struct sorting routine makes sure that any identical names in
1392  * the file list stay in the same order as they were in the original list.
1393  * This is particularly vital in inc_recurse mode where we expect a sort
1394  * on the flist to match the exact order of a sort on the dir_flist. */
1395 static void fsort(struct file_struct **fp, size_t num)
1396 {
1397         if (num <= 1)
1398                 return;
1399
1400         if (use_qsort)
1401                 qsort(fp, num, PTR_SIZE, file_compare);
1402         else {
1403                 struct file_struct **tmp = new_array(struct file_struct *,
1404                                                      (num+1) / 2);
1405                 fsort_tmp(fp, num, tmp);
1406                 free(tmp);
1407         }
1408 }
1409
1410 /* We take an entire set of sibling dirs from the sorted flist and link them
1411  * into the tree, setting the appropriate parent/child/sibling pointers. */
1412 static void add_dirs_to_tree(int parent_ndx, struct file_list *from_flist,
1413                              int dir_cnt)
1414 {
1415         int i;
1416         int32 *dp = NULL;
1417         int32 *parent_dp = parent_ndx < 0 ? NULL
1418                          : F_DIR_NODE_P(dir_flist->sorted[parent_ndx]);
1419
1420         flist_expand(dir_flist, dir_cnt);
1421         dir_flist->sorted = dir_flist->files;
1422
1423         for (i = 0; dir_cnt; i++) {
1424                 struct file_struct *file = from_flist->sorted[i];
1425
1426                 if (!S_ISDIR(file->mode))
1427                         continue;
1428
1429                 dir_flist->files[dir_flist->used++] = file;
1430                 dir_cnt--;
1431
1432                 if (!(file->flags & FLAG_XFER_DIR)
1433                  || file->flags & FLAG_MOUNT_DIR)
1434                         continue;
1435
1436                 if (dp)
1437                         DIR_NEXT_SIBLING(dp) = dir_flist->used - 1;
1438                 else if (parent_dp)
1439                         DIR_FIRST_CHILD(parent_dp) = dir_flist->used - 1;
1440                 else
1441                         send_dir_ndx = dir_flist->used - 1;
1442
1443                 dp = F_DIR_NODE_P(file);
1444                 DIR_PARENT(dp) = parent_ndx;
1445                 DIR_FIRST_CHILD(dp) = -1;
1446         }
1447         if (dp)
1448                 DIR_NEXT_SIBLING(dp) = -1;
1449 }
1450
1451 /* This function is normally called by the sender, but the receiving side also
1452  * calls it from get_dirlist() with f set to -1 so that we just construct the
1453  * file list in memory without sending it over the wire.  Also, get_dirlist()
1454  * might call this with f set to -2, which also indicates that local filter
1455  * rules should be ignored. */
1456 static void send_directory(int f, struct file_list *flist, char *fbuf, int len,
1457                            int flags)
1458 {
1459         struct dirent *di;
1460         unsigned remainder;
1461         char *p;
1462         DIR *d;
1463         int divert_dirs = (flags & FLAG_DIVERT_DIRS) != 0;
1464         int start = flist->used;
1465         int filter_level = f == -2 ? SERVER_FILTERS : ALL_FILTERS;
1466
1467         assert(flist != NULL);
1468
1469         if (!(d = opendir(fbuf))) {
1470                 io_error |= IOERR_GENERAL;
1471                 rsyserr(FERROR, errno, "opendir %s failed", full_fname(fbuf));
1472                 return;
1473         }
1474
1475         p = fbuf + len;
1476         if (len != 1 || *fbuf != '/')
1477                 *p++ = '/';
1478         *p = '\0';
1479         remainder = MAXPATHLEN - (p - fbuf);
1480
1481         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1482                 char *dname = d_name(di);
1483                 if (dname[0] == '.' && (dname[1] == '\0'
1484                     || (dname[1] == '.' && dname[2] == '\0')))
1485                         continue;
1486                 if (strlcpy(p, dname, remainder) >= remainder) {
1487                         io_error |= IOERR_GENERAL;
1488                         rprintf(FINFO,
1489                                 "cannot send long-named file %s\n",
1490                                 full_fname(fbuf));
1491                         continue;
1492                 }
1493                 if (dname[0] == '\0') {
1494                         io_error |= IOERR_GENERAL;
1495                         rprintf(FINFO,
1496                                 "cannot send file with empty name in %s\n",
1497                                 full_fname(fbuf));
1498                         continue;
1499                 }
1500
1501                 send_file_name(f, flist, fbuf, NULL, flags, filter_level);
1502         }
1503
1504         fbuf[len] = '\0';
1505
1506         if (errno) {
1507                 io_error |= IOERR_GENERAL;
1508                 rsyserr(FERROR, errno, "readdir(%s)", full_fname(fbuf));
1509         }
1510
1511         closedir(d);
1512
1513         if (f >= 0 && recurse && !divert_dirs) {
1514                 int i, end = flist->used - 1;
1515                 /* send_if_directory() bumps flist->used, so use "end". */
1516                 for (i = start; i <= end; i++)
1517                         send_if_directory(f, flist, flist->files[i], fbuf, len, flags);
1518         }
1519 }
1520
1521 static void send1extra(int f, struct file_struct *file, struct file_list *flist)
1522 {
1523         char fbuf[MAXPATHLEN];
1524         int dlen;
1525
1526         f_name(file, fbuf);
1527         dlen = strlen(fbuf);
1528
1529         if (F_PATHNAME(file) != pathname) {
1530                 if (!push_pathname(F_PATHNAME(file), -1))
1531                         exit_cleanup(RERR_FILESELECT);
1532         }
1533
1534         change_local_filter_dir(fbuf, dlen, send_dir_depth);
1535
1536         send_directory(f, flist, fbuf, dlen, FLAG_DIVERT_DIRS | FLAG_XFER_DIR);
1537 }
1538
1539 void send_extra_file_list(int f, int at_least)
1540 {
1541         struct file_list *flist;
1542         int64 start_write;
1543         int future_cnt, save_io_error = io_error;
1544
1545         if (flist_eof)
1546                 return;
1547
1548         /* Keep sending data until we have the requested number of
1549          * files in the upcoming file-lists. */
1550         if (cur_flist->next) {
1551                 flist = first_flist->prev; /* the newest flist */
1552                 future_cnt = flist->ndx_end - cur_flist->next->ndx_start + 1;
1553         } else
1554                 future_cnt = 0;
1555         while (future_cnt < at_least) {
1556                 struct file_struct *file = dir_flist->sorted[send_dir_ndx];
1557                 int dir_ndx, dstart = dir_count;
1558                 const char *pathname = F_PATHNAME(file);
1559                 int32 *dp;
1560
1561                 flist = flist_new(0, "send_extra_file_list");
1562                 start_write = stats.total_written;
1563
1564 #ifdef ICONV_OPTION
1565                 if (ic_ndx)
1566                         dir_ndx = F_NDX(file);
1567                 else
1568 #endif
1569                         dir_ndx = send_dir_ndx;
1570                 write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
1571                 flist->parent_ndx = dir_ndx;
1572
1573                 send1extra(f, file, flist);
1574                 dp = F_DIR_NODE_P(file);
1575
1576                 /* If there are any duplicate directory names that follow, we
1577                  * send all the dirs together in one file-list.  The dir_flist
1578                  * tree links all the child subdirs onto the last dup dir. */
1579                 while ((dir_ndx = DIR_NEXT_SIBLING(dp)) >= 0
1580                     && dir_flist->sorted[dir_ndx]->flags & FLAG_DUPLICATE) {
1581                         send_dir_ndx = dir_ndx;
1582                         file = dir_flist->sorted[dir_ndx];
1583                         if (F_PATHNAME(file) != pathname)
1584                                 send1extra(f, file, flist);
1585                         dp = F_DIR_NODE_P(file);
1586                 }
1587
1588                 write_byte(f, 0);
1589
1590 #ifdef ICONV_OPTION
1591                 if (need_unsorted_flist) {
1592                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
1593                                 out_of_memory("send_extra_file_list");
1594                         memcpy(flist->sorted, flist->files,
1595                                flist->used * sizeof (struct file_struct*));
1596                 } else
1597 #endif
1598                         flist->sorted = flist->files;
1599
1600                 clean_flist(flist, 0);
1601
1602                 flist->ndx_end = flist->ndx_start + flist->used - 1
1603                                - (dir_count - dstart);
1604
1605                 add_dirs_to_tree(send_dir_ndx, flist, dir_count - dstart);
1606                 flist_done_allocating(flist);
1607
1608                 file_total += flist->used;
1609                 future_cnt += flist->used;
1610                 stats.flist_size += stats.total_written - start_write;
1611                 stats.num_files += flist->used;
1612                 if (verbose > 3)
1613                         output_flist(flist);
1614
1615                 if (DIR_FIRST_CHILD(dp) >= 0) {
1616                         send_dir_ndx = DIR_FIRST_CHILD(dp);
1617                         send_dir_depth++;
1618                 } else {
1619                         while (DIR_NEXT_SIBLING(dp) < 0) {
1620                                 if ((send_dir_ndx = DIR_PARENT(dp)) < 0) {
1621                                         write_ndx(f, NDX_FLIST_EOF);
1622                                         flist_eof = 1;
1623                                         change_local_filter_dir(NULL, 0, 0);
1624                                         goto finish;
1625                                 }
1626                                 send_dir_depth--;
1627                                 file = dir_flist->sorted[send_dir_ndx];
1628                                 dp = F_DIR_NODE_P(file);
1629                         }
1630                         send_dir_ndx = DIR_NEXT_SIBLING(dp);
1631                 }
1632         }
1633
1634   finish:
1635         if (io_error != save_io_error && !ignore_errors)
1636                 send_msg_int(MSG_IO_ERROR, io_error);
1637 }
1638
1639 struct file_list *send_file_list(int f, int argc, char *argv[])
1640 {
1641         static const char *lastdir;
1642         static int lastdir_len = -1;
1643         int len, dirlen;
1644         STRUCT_STAT st;
1645         char *p, *dir;
1646         char lastpath[MAXPATHLEN] = "";
1647         struct file_list *flist;
1648         struct timeval start_tv, end_tv;
1649         int64 start_write;
1650         int use_ff_fd = 0;
1651         int flags, disable_buffering;
1652         int reading_remotely = filesfrom_host != NULL;
1653         int rl_nulls = eol_nulls || reading_remotely;
1654
1655         rprintf(FLOG, "building file list\n");
1656         if (show_filelist_p())
1657                 start_filelist_progress("building file list");
1658         else if (inc_recurse && verbose && !am_server)
1659                 rprintf(FCLIENT, "sending incremental file list\n");
1660
1661         start_write = stats.total_written;
1662         gettimeofday(&start_tv, NULL);
1663
1664 #ifdef SUPPORT_HARD_LINKS
1665         if (preserve_hard_links && protocol_version >= 30 && !cur_flist)
1666                 init_hard_links();
1667 #endif
1668
1669         flist = cur_flist = flist_new(0, "send_file_list");
1670         if (inc_recurse) {
1671                 dir_flist = flist_new(FLIST_TEMP, "send_file_list");
1672                 flags = FLAG_DIVERT_DIRS | FLAG_XFER_DIR;
1673         } else {
1674                 dir_flist = cur_flist;
1675                 flags = FLAG_XFER_DIR;
1676         }
1677
1678         disable_buffering = io_start_buffering_out(f);
1679         if (filesfrom_fd >= 0) {
1680                 if (argv[0] && !push_dir(argv[0], 0)) {
1681                         rsyserr(FERROR, errno, "push_dir %s failed in %s",
1682                                 full_fname(argv[0]), curr_dir);
1683                         exit_cleanup(RERR_FILESELECT);
1684                 }
1685                 use_ff_fd = 1;
1686         }
1687
1688         while (1) {
1689                 char fbuf[MAXPATHLEN];
1690                 char *fn;
1691                 int is_dot_dir;
1692
1693                 if (use_ff_fd) {
1694                         if (read_line(filesfrom_fd, fbuf, sizeof fbuf, !reading_remotely, rl_nulls) == 0)
1695                                 break;
1696                         sanitize_path(fbuf, fbuf, "", 0, NULL);
1697                 } else {
1698                         if (argc-- == 0)
1699                                 break;
1700                         strlcpy(fbuf, *argv++, MAXPATHLEN);
1701                         if (sanitize_paths)
1702                                 sanitize_path(fbuf, fbuf, "", 0, NULL);
1703                 }
1704
1705                 len = strlen(fbuf);
1706                 if (relative_paths) {
1707                         /* We clean up fbuf below. */
1708                         is_dot_dir = 0;
1709                 } else if (!len || fbuf[len - 1] == '/') {
1710                         if (len == 2 && fbuf[0] == '.') {
1711                                 /* Turn "./" into just "." rather than "./." */
1712                                 fbuf[1] = '\0';
1713                         } else {
1714                                 if (len + 1 >= MAXPATHLEN)
1715                                         overflow_exit("send_file_list");
1716                                 fbuf[len++] = '.';
1717                                 fbuf[len] = '\0';
1718                         }
1719                         is_dot_dir = 1;
1720                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
1721                     && (len == 2 || fbuf[len-3] == '/')) {
1722                         if (len + 2 >= MAXPATHLEN)
1723                                 overflow_exit("send_file_list");
1724                         fbuf[len++] = '/';
1725                         fbuf[len++] = '.';
1726                         fbuf[len] = '\0';
1727                         is_dot_dir = 1;
1728                 } else {
1729                         is_dot_dir = fbuf[len-1] == '.'
1730                                    && (len == 1 || fbuf[len-2] == '/');
1731                 }
1732
1733                 dir = NULL;
1734
1735                 if (!relative_paths) {
1736                         p = strrchr(fbuf, '/');
1737                         if (p) {
1738                                 *p = '\0';
1739                                 if (p == fbuf)
1740                                         dir = "/";
1741                                 else
1742                                         dir = fbuf;
1743                                 len -= p - fbuf + 1;
1744                                 fn = p + 1;
1745                         } else
1746                                 fn = fbuf;
1747                 } else {
1748                         if ((p = strstr(fbuf, "/./")) != NULL) {
1749                                 *p = '\0';
1750                                 if (p == fbuf)
1751                                         dir = "/";
1752                                 else
1753                                         dir = fbuf;
1754                                 len -= p - fbuf + 3;
1755                                 fn = p + 3;
1756                         } else
1757                                 fn = fbuf;
1758                         /* Get rid of trailing "/" and "/.". */
1759                         while (len) {
1760                                 if (fn[len - 1] == '/') {
1761                                         is_dot_dir = 1;
1762                                         if (!--len && !dir) {
1763                                                 len++;
1764                                                 break;
1765                                         }
1766                                 }
1767                                 else if (len >= 2 && fn[len - 1] == '.'
1768                                                   && fn[len - 2] == '/') {
1769                                         is_dot_dir = 1;
1770                                         if (!(len -= 2) && !dir) {
1771                                                 len++;
1772                                                 break;
1773                                         }
1774                                 } else
1775                                         break;
1776                         }
1777                         if (len == 1 && fn[0] == '/')
1778                                 fn[len++] = '.';
1779                         fn[len] = '\0';
1780                         /* Reject a ".." dir in the active part of the path. */
1781                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
1782                                 if ((p[2] == '/' || p[2] == '\0')
1783                                  && (p == fn || p[-1] == '/')) {
1784                                         rprintf(FERROR,
1785                                             "found \"..\" dir in relative path: %s\n",
1786                                             fbuf);
1787                                         exit_cleanup(RERR_SYNTAX);
1788                                 }
1789                         }
1790                 }
1791
1792                 if (!*fn) {
1793                         len = 1;
1794                         fn = ".";
1795                 }
1796
1797                 dirlen = dir ? strlen(dir) : 0;
1798                 if (dirlen != lastdir_len || memcmp(lastdir, dir, dirlen) != 0) {
1799                         if (!push_pathname(dir ? strdup(dir) : NULL, dirlen))
1800                                 continue;
1801                         lastdir = pathname;
1802                         lastdir_len = pathname_len;
1803                 } else if (!push_pathname(lastdir, lastdir_len))
1804                         continue;
1805
1806                 if (fn != fbuf)
1807                         memmove(fbuf, fn, len + 1);
1808
1809                 if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1810                         io_error |= IOERR_GENERAL;
1811                         rsyserr(FERROR, errno, "link_stat %s failed",
1812                                 full_fname(fbuf));
1813                         continue;
1814                 }
1815
1816                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
1817                         rprintf(FINFO, "skipping directory %s\n", fbuf);
1818                         continue;
1819                 }
1820
1821                 if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
1822                         /* Send the implied directories at the start of the
1823                          * source spec, so we get their permissions right. */
1824                         char *lp = lastpath, *slash = fbuf;
1825                         *p = '\0';
1826                         /* Skip any initial directories in our path that we
1827                          * have in common with lastpath. */
1828                         for (fn = fbuf; *fn && *lp == *fn; lp++, fn++) {
1829                                 if (*fn == '/')
1830                                         slash = fn;
1831                         }
1832                         *p = '/';
1833                         if (fn != p || (*lp && *lp != '/')) {
1834                                 int save_copy_links = copy_links;
1835                                 int save_xfer_dirs = xfer_dirs;
1836                                 int dir_flags = flags & ~FLAG_XFER_DIR;
1837                                 copy_links |= copy_unsafe_links;
1838                                 xfer_dirs = 1;
1839                                 while ((slash = strchr(slash+1, '/')) != 0) {
1840                                         *slash = '\0';
1841                                         send_file_name(f, flist, fbuf, NULL,
1842                                                        dir_flags, ALL_FILTERS);
1843                                         *slash = '/';
1844                                 }
1845                                 copy_links = save_copy_links;
1846                                 xfer_dirs = save_xfer_dirs;
1847                                 *p = '\0';
1848                                 strlcpy(lastpath, fbuf, sizeof lastpath);
1849                                 *p = '/';
1850                         }
1851                 }
1852
1853                 if (one_file_system)
1854                         filesystem_dev = st.st_dev;
1855
1856                 if (recurse || (xfer_dirs && is_dot_dir)) {
1857                         struct file_struct *file;
1858                         int top_flags = FLAG_TOP_DIR | flags;
1859                         file = send_file_name(f, flist, fbuf, &st,
1860                                               top_flags, ALL_FILTERS);
1861                         if (file && !inc_recurse)
1862                                 send_if_directory(f, flist, file, fbuf, len, flags);
1863                 } else
1864                         send_file_name(f, flist, fbuf, &st, flags, ALL_FILTERS);
1865         }
1866
1867         gettimeofday(&end_tv, NULL);
1868         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
1869                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
1870         if (stats.flist_buildtime == 0)
1871                 stats.flist_buildtime = 1;
1872         start_tv = end_tv;
1873
1874         write_byte(f, 0); /* Indicate end of file list */
1875
1876 #ifdef SUPPORT_HARD_LINKS
1877         if (preserve_hard_links && protocol_version >= 30 && !inc_recurse)
1878                 idev_destroy();
1879 #endif
1880
1881         if (show_filelist_p())
1882                 finish_filelist_progress(flist);
1883
1884         gettimeofday(&end_tv, NULL);
1885         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
1886                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
1887
1888         /* When converting names, both sides keep an unsorted file-list array
1889          * because the names will differ on the sending and receiving sides
1890          * (both sides will use the unsorted index number for each item). */
1891
1892         /* Sort the list without removing any duplicates.  This allows the
1893          * receiving side to ask for whatever name it kept.  For incremental
1894          * recursion mode, the sender marks duplicate dirs so that it can
1895          * send them together in a single file-list. */
1896 #ifdef ICONV_OPTION
1897         if (need_unsorted_flist) {
1898                 if (inc_recurse) {
1899                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
1900                                 out_of_memory("send_file_list");
1901                         memcpy(flist->sorted, flist->files,
1902                                flist->used * sizeof (struct file_struct*));
1903                         clean_flist(flist, 0);
1904                 } else {
1905                         flist->sorted = flist->files;
1906                         flist->low = 0;
1907                         flist->high = flist->used - 1;
1908                 }
1909         } else
1910 #endif
1911         {
1912                 flist->sorted = flist->files;
1913                 clean_flist(flist, 0);
1914         }
1915         file_total += flist->used;
1916
1917         /* We don't subtract dir_count for the first send since we
1918          * might have one or more dot dirs which need to get sent. */
1919         flist->ndx_end = flist->ndx_start + flist->used - 1;
1920
1921         if (!numeric_ids && !inc_recurse)
1922                 send_id_list(f);
1923
1924         /* send the io_error flag */
1925         if (protocol_version < 30)
1926                 write_int(f, ignore_errors ? 0 : io_error);
1927         else if (io_error && !ignore_errors)
1928                 send_msg_int(MSG_IO_ERROR, io_error);
1929
1930         if (disable_buffering)
1931                 io_end_buffering_out();
1932
1933         stats.flist_size = stats.total_written - start_write;
1934         stats.num_files = flist->used;
1935
1936         if (verbose > 3)
1937                 output_flist(flist);
1938
1939         if (verbose > 2)
1940                 rprintf(FINFO, "send_file_list done\n");
1941
1942         if (inc_recurse) {
1943                 add_dirs_to_tree(-1, flist, dir_count);
1944                 flist_done_allocating(flist);
1945                 if (send_dir_ndx < 0) {
1946                         write_ndx(f, NDX_FLIST_EOF);
1947                         flist_eof = 1;
1948                 }
1949                 else if (file_total == 1) {
1950                         /* If we're creating incremental file-lists and there
1951                          * was just 1 item in the first file-list, send 1 more
1952                          * file-list to check if this is a 1-file xfer. */
1953                         send_extra_file_list(f, 1);
1954                 }
1955         }
1956
1957         return flist;
1958 }
1959
1960 struct file_list *recv_file_list(int f)
1961 {
1962         struct file_list *flist;
1963         int dstart, flags;
1964         int64 start_read;
1965
1966         if (!first_flist)
1967                 rprintf(FLOG, "receiving file list\n");
1968         if (show_filelist_p())
1969                 start_filelist_progress("receiving file list");
1970         else if (inc_recurse && verbose && !am_server && !first_flist)
1971                 rprintf(FCLIENT, "receiving incremental file list\n");
1972
1973         start_read = stats.total_read;
1974
1975 #ifdef SUPPORT_HARD_LINKS
1976         if (preserve_hard_links && !first_flist)
1977                 init_hard_links();
1978 #endif
1979
1980         flist = flist_new(0, "recv_file_list");
1981
1982         if (inc_recurse) {
1983                 if (flist->ndx_start == 0)
1984                         dir_flist = flist_new(FLIST_TEMP, "recv_file_list");
1985                 dstart = dir_flist->used;
1986         } else {
1987                 dir_flist = flist;
1988                 dstart = 0;
1989         }
1990
1991         while ((flags = read_byte(f)) != 0) {
1992                 struct file_struct *file;
1993
1994                 flist_expand(flist, 1);
1995
1996                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
1997                         flags |= read_byte(f) << 8;
1998                 file = recv_file_entry(flist, flags, f);
1999
2000                 if (inc_recurse && S_ISDIR(file->mode)) {
2001                         flist_expand(dir_flist, 1);
2002                         dir_flist->files[dir_flist->used++] = file;
2003                 }
2004
2005                 flist->files[flist->used++] = file;
2006
2007                 maybe_emit_filelist_progress(flist->used);
2008
2009                 if (verbose > 2) {
2010                         rprintf(FINFO, "recv_file_name(%s)\n",
2011                                 f_name(file, NULL));
2012                 }
2013         }
2014         file_total += flist->used;
2015
2016         flist->ndx_end = flist->ndx_start + flist->used - 1;
2017         if (inc_recurse && flist->ndx_start)
2018                 flist->ndx_end -= dir_flist->used - dstart;
2019
2020         if (verbose > 2)
2021                 rprintf(FINFO, "received %d names\n", flist->used);
2022
2023         if (show_filelist_p())
2024                 finish_filelist_progress(flist);
2025
2026 #ifdef ICONV_OPTION
2027         if (need_unsorted_flist) {
2028                 /* Create an extra array of index pointers that we can sort for
2029                  * the generator's use (for wading through the files in sorted
2030                  * order and for calling flist_find()).  We keep the "files"
2031                  * list unsorted for our exchange of index numbers with the
2032                  * other side (since their names may not sort the same). */
2033                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2034                         out_of_memory("recv_file_list");
2035                 memcpy(flist->sorted, flist->files,
2036                        flist->used * sizeof (struct file_struct*));
2037                 if (inc_recurse && dir_flist->used > dstart) {
2038                         dir_flist->sorted = realloc_array(dir_flist->sorted,
2039                                                 struct file_struct *,
2040                                                 dir_flist->used);
2041                         memcpy(dir_flist->sorted + dstart, dir_flist->files + dstart,
2042                                (dir_flist->used - dstart) * sizeof (struct file_struct*));
2043                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2044                 }
2045         } else
2046 #endif
2047         {
2048                 flist->sorted = flist->files;
2049                 if (inc_recurse && dir_flist->used > dstart) {
2050                         dir_flist->sorted = dir_flist->files;
2051                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2052                 }
2053         }
2054
2055         if (inc_recurse)
2056                 flist_done_allocating(flist);
2057         else if (f >= 0)
2058                 recv_id_list(f, flist);
2059
2060         clean_flist(flist, relative_paths);
2061
2062         if (protocol_version < 30) {
2063                 /* Recv the io_error flag */
2064                 if (ignore_errors)
2065                         read_int(f);
2066                 else
2067                         io_error |= read_int(f);
2068         }
2069
2070         if (verbose > 3)
2071                 output_flist(flist);
2072
2073         if (list_only) {
2074                 int i;
2075                 for (i = flist->low; i <= flist->high; i++)
2076                         list_file_entry(flist->files[i]);
2077         }
2078
2079         if (verbose > 2)
2080                 rprintf(FINFO, "recv_file_list done\n");
2081
2082         stats.flist_size += stats.total_read - start_read;
2083         stats.num_files += flist->used;
2084
2085         return flist;
2086 }
2087
2088 /* This is only used once by the receiver if the very first file-list
2089  * has exactly one item in it. */
2090 void recv_additional_file_list(int f)
2091 {
2092         struct file_list *flist;
2093         int ndx = read_ndx(f);
2094         if (ndx == NDX_FLIST_EOF) {
2095                 flist_eof = 1;
2096                 change_local_filter_dir(NULL, 0, 0);
2097         } else {
2098                 ndx = NDX_FLIST_OFFSET - ndx;
2099                 if (ndx < 0 || ndx >= dir_flist->used) {
2100                         ndx = NDX_FLIST_OFFSET - ndx;
2101                         rprintf(FERROR,
2102                                 "[%s] Invalid dir index: %d (%d - %d)\n",
2103                                 who_am_i(), ndx, NDX_FLIST_OFFSET,
2104                                 NDX_FLIST_OFFSET - dir_flist->used + 1);
2105                         exit_cleanup(RERR_PROTOCOL);
2106                 }
2107                 if (verbose > 3) {
2108                         rprintf(FINFO, "[%s] receiving flist for dir %d\n",
2109                                 who_am_i(), ndx);
2110                 }
2111                 flist = recv_file_list(f);
2112                 flist->parent_ndx = ndx;
2113         }
2114 }
2115
2116 /* Search for an identically-named item in the file list.  Note that the
2117  * items must agree in their directory-ness, or no match is returned. */
2118 int flist_find(struct file_list *flist, struct file_struct *f)
2119 {
2120         int low = flist->low, high = flist->high;
2121         int diff, mid, mid_up;
2122
2123         while (low <= high) {
2124                 mid = (low + high) / 2;
2125                 if (F_IS_ACTIVE(flist->sorted[mid]))
2126                         mid_up = mid;
2127                 else {
2128                         /* Scan for the next non-empty entry using the cached
2129                          * distance values.  If the value isn't fully up-to-
2130                          * date, update it. */
2131                         mid_up = mid + F_DEPTH(flist->sorted[mid]);
2132                         if (!F_IS_ACTIVE(flist->sorted[mid_up])) {
2133                                 do {
2134                                     mid_up += F_DEPTH(flist->sorted[mid_up]);
2135                                 } while (!F_IS_ACTIVE(flist->sorted[mid_up]));
2136                                 F_DEPTH(flist->sorted[mid]) = mid_up - mid;
2137                         }
2138                         if (mid_up > high) {
2139                                 /* If there's nothing left above us, set high to
2140                                  * a non-empty entry below us and continue. */
2141                                 high = mid - (int)flist->sorted[mid]->len32;
2142                                 if (!F_IS_ACTIVE(flist->sorted[high])) {
2143                                         do {
2144                                             high -= (int)flist->sorted[high]->len32;
2145                                         } while (!F_IS_ACTIVE(flist->sorted[high]));
2146                                         flist->sorted[mid]->len32 = mid - high;
2147                                 }
2148                                 continue;
2149                         }
2150                 }
2151                 diff = f_name_cmp(flist->sorted[mid_up], f);
2152                 if (diff == 0) {
2153                         if (protocol_version < 29
2154                             && S_ISDIR(flist->sorted[mid_up]->mode)
2155                             != S_ISDIR(f->mode))
2156                                 return -1;
2157                         return mid_up;
2158                 }
2159                 if (diff < 0)
2160                         low = mid_up + 1;
2161                 else
2162                         high = mid - 1;
2163         }
2164         return -1;
2165 }
2166
2167 /*
2168  * Free up any resources a file_struct has allocated
2169  * and clear the file.
2170  */
2171 void clear_file(struct file_struct *file)
2172 {
2173         /* The +1 zeros out the first char of the basename. */
2174         memset(file, 0, FILE_STRUCT_LEN + 1);
2175         /* In an empty entry, F_DEPTH() is an offset to the next non-empty
2176          * entry.  Likewise for len32 in the opposite direction.  We assume
2177          * that we're alone for now since flist_find() will adjust the counts
2178          * it runs into that aren't up-to-date. */
2179         file->len32 = F_DEPTH(file) = 1;
2180 }
2181
2182 /* Allocate a new file list. */
2183 struct file_list *flist_new(int flags, char *msg)
2184 {
2185         struct file_list *flist;
2186
2187         flist = new0(struct file_list);
2188         if (!flist)
2189                 out_of_memory(msg);
2190
2191         if (flags & FLIST_TEMP) {
2192                 if (!(flist->file_pool = pool_create(SMALL_EXTENT, 0,
2193                                                 out_of_memory, POOL_INTERN)))
2194                         out_of_memory(msg);
2195         } else {
2196                 /* This is a doubly linked list with prev looping back to
2197                  * the end of the list, but the last next pointer is NULL. */
2198                 if (!first_flist) {
2199                         flist->file_pool = pool_create(NORMAL_EXTENT, 0,
2200                                                 out_of_memory, POOL_INTERN);
2201                         if (!flist->file_pool)
2202                                 out_of_memory(msg);
2203
2204                         first_flist = cur_flist = flist->prev = flist;
2205                 } else {
2206                         flist->file_pool = first_flist->file_pool;
2207
2208                         flist->ndx_start = first_flist->prev->ndx_end + 2;
2209                         if (flist->ndx_start <= high_hlink_ndx)
2210                                 flist->ndx_start = high_hlink_ndx + 1;
2211
2212                         flist->prev = first_flist->prev;
2213                         flist->prev->next = first_flist->prev = flist;
2214                 }
2215                 flist->pool_boundary = pool_boundary(flist->file_pool, 0);
2216                 flist_cnt++;
2217         }
2218
2219         return flist;
2220 }
2221
2222 /* Free up all elements in a flist. */
2223 void flist_free(struct file_list *flist)
2224 {
2225         if (!flist->prev) {
2226                 /* Was FLIST_TEMP dir-list. */
2227         } else if (flist == flist->prev) {
2228                 first_flist = cur_flist = NULL;
2229                 file_total = 0;
2230                 flist_cnt = 0;
2231         } else {
2232                 if (flist == cur_flist)
2233                         cur_flist = flist->next;
2234                 if (flist == first_flist)
2235                         first_flist = first_flist->next;
2236                 else {
2237                         flist->prev->next = flist->next;
2238                         if (!flist->next)
2239                                 flist->next = first_flist;
2240                 }
2241                 flist->next->prev = flist->prev;
2242                 file_total -= flist->used;
2243                 flist_cnt--;
2244         }
2245
2246         if (!flist->prev || !flist_cnt)
2247                 pool_destroy(flist->file_pool);
2248         else
2249                 pool_free_old(flist->file_pool, flist->pool_boundary);
2250
2251         if (flist->sorted && flist->sorted != flist->files)
2252                 free(flist->sorted);
2253         free(flist->files);
2254         free(flist);
2255 }
2256
2257 /* This routine ensures we don't have any duplicate names in our file list.
2258  * duplicate names can cause corruption because of the pipelining. */
2259 static void clean_flist(struct file_list *flist, int strip_root)
2260 {
2261         char fbuf[MAXPATHLEN];
2262         int i, prev_i;
2263
2264         if (!flist)
2265                 return;
2266         if (flist->used == 0) {
2267                 flist->high = -1;
2268                 flist->low = 0;
2269                 return;
2270         }
2271
2272         fsort(flist->sorted, flist->used);
2273
2274         if (!am_sender || inc_recurse) {
2275                 for (i = prev_i = 0; i < flist->used; i++) {
2276                         if (F_IS_ACTIVE(flist->sorted[i])) {
2277                                 prev_i = i;
2278                                 break;
2279                         }
2280                 }
2281                 flist->low = prev_i;
2282         } else {
2283                 i = prev_i = flist->used - 1;
2284                 flist->low = 0;
2285         }
2286
2287         while (++i < flist->used) {
2288                 int j;
2289                 struct file_struct *file = flist->sorted[i];
2290
2291                 if (!F_IS_ACTIVE(file))
2292                         continue;
2293                 if (f_name_cmp(file, flist->sorted[prev_i]) == 0)
2294                         j = prev_i;
2295                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
2296                         int save_mode = file->mode;
2297                         /* Make sure that this directory doesn't duplicate a
2298                          * non-directory earlier in the list. */
2299                         flist->high = prev_i;
2300                         file->mode = S_IFREG;
2301                         j = flist_find(flist, file);
2302                         file->mode = save_mode;
2303                 } else
2304                         j = -1;
2305                 if (j >= 0) {
2306                         int keep, drop;
2307                         /* If one is a dir and the other is not, we want to
2308                          * keep the dir because it might have contents in the
2309                          * list.  Otherwise keep the first one. */
2310                         if (S_ISDIR(file->mode)) {
2311                                 struct file_struct *fp = flist->sorted[j];
2312                                 if (!S_ISDIR(fp->mode) || !(fp->flags & FLAG_XFER_DIR))
2313                                         keep = i, drop = j;
2314                                 else {
2315                                         if (am_sender)
2316                                                 file->flags |= FLAG_DUPLICATE;
2317                                         keep = j, drop = i;
2318                                 }
2319                         } else
2320                                 keep = j, drop = i;
2321
2322                         if (!am_sender) {
2323                                 if (verbose > 1) {
2324                                         rprintf(FINFO,
2325                                             "removing duplicate name %s from file list (%d)\n",
2326                                             f_name(file, fbuf), drop + flist->ndx_start);
2327                                 }
2328                                 /* Make sure we don't lose track of a user-specified
2329                                  * top directory. */
2330                                 flist->sorted[keep]->flags |= flist->sorted[drop]->flags
2331                                                            & (FLAG_TOP_DIR|FLAG_XFER_DIR);
2332
2333                                 clear_file(flist->sorted[drop]);
2334                         }
2335
2336                         if (keep == i) {
2337                                 if (flist->low == drop) {
2338                                         for (j = drop + 1;
2339                                              j < i && !F_IS_ACTIVE(flist->sorted[j]);
2340                                              j++) {}
2341                                         flist->low = j;
2342                                 }
2343                                 prev_i = i;
2344                         }
2345                 } else
2346                         prev_i = i;
2347         }
2348         flist->high = prev_i;
2349
2350         if (strip_root) {
2351                 /* We need to strip off the leading slashes for relative
2352                  * paths, but this must be done _after_ the sorting phase. */
2353                 for (i = flist->low; i <= flist->high; i++) {
2354                         struct file_struct *file = flist->sorted[i];
2355
2356                         if (!file->dirname)
2357                                 continue;
2358                         while (*file->dirname == '/')
2359                                 file->dirname++;
2360                         if (!*file->dirname)
2361                                 file->dirname = NULL;
2362                 }
2363         }
2364
2365         if (prune_empty_dirs && !am_sender) {
2366                 int j, prev_depth = 0;
2367
2368                 prev_i = 0; /* It's OK that this isn't really true. */
2369
2370                 for (i = flist->low; i <= flist->high; i++) {
2371                         struct file_struct *fp, *file = flist->sorted[i];
2372
2373                         /* This temporarily abuses the F_DEPTH() value for a
2374                          * directory that is in a chain that might get pruned.
2375                          * We restore the old value if it gets a reprieve. */
2376                         if (S_ISDIR(file->mode) && F_DEPTH(file)) {
2377                                 /* Dump empty dirs when coming back down. */
2378                                 for (j = prev_depth; j >= F_DEPTH(file); j--) {
2379                                         fp = flist->sorted[prev_i];
2380                                         if (F_DEPTH(fp) >= 0)
2381                                                 break;
2382                                         prev_i = -F_DEPTH(fp)-1;
2383                                         clear_file(fp);
2384                                 }
2385                                 prev_depth = F_DEPTH(file);
2386                                 if (is_excluded(f_name(file, fbuf), 1,
2387                                                        ALL_FILTERS)) {
2388                                         /* Keep dirs through this dir. */
2389                                         for (j = prev_depth-1; ; j--) {
2390                                                 fp = flist->sorted[prev_i];
2391                                                 if (F_DEPTH(fp) >= 0)
2392                                                         break;
2393                                                 prev_i = -F_DEPTH(fp)-1;
2394                                                 F_DEPTH(fp) = j;
2395                                         }
2396                                 } else
2397                                         F_DEPTH(file) = -prev_i-1;
2398                                 prev_i = i;
2399                         } else {
2400                                 /* Keep dirs through this non-dir. */
2401                                 for (j = prev_depth; ; j--) {
2402                                         fp = flist->sorted[prev_i];
2403                                         if (F_DEPTH(fp) >= 0)
2404                                                 break;
2405                                         prev_i = -F_DEPTH(fp)-1;
2406                                         F_DEPTH(fp) = j;
2407                                 }
2408                         }
2409                 }
2410                 /* Dump all remaining empty dirs. */
2411                 while (1) {
2412                         struct file_struct *fp = flist->sorted[prev_i];
2413                         if (F_DEPTH(fp) >= 0)
2414                                 break;
2415                         prev_i = -F_DEPTH(fp)-1;
2416                         clear_file(fp);
2417                 }
2418
2419                 for (i = flist->low; i <= flist->high; i++) {
2420                         if (F_IS_ACTIVE(flist->sorted[i]))
2421                                 break;
2422                 }
2423                 flist->low = i;
2424                 for (i = flist->high; i >= flist->low; i--) {
2425                         if (F_IS_ACTIVE(flist->sorted[i]))
2426                                 break;
2427                 }
2428                 flist->high = i;
2429         }
2430 }
2431
2432 static void output_flist(struct file_list *flist)
2433 {
2434         char uidbuf[16], gidbuf[16], depthbuf[16];
2435         struct file_struct *file;
2436         const char *root, *dir, *slash, *name, *trail;
2437         const char *who = who_am_i();
2438         int i;
2439
2440         rprintf(FINFO, "[%s] flist start=%d, end=%d, used=%d, low=%d, high=%d\n",
2441                 who, flist->ndx_start, flist->ndx_end, flist->used, flist->low, flist->high);
2442         for (i = 0; i < flist->used; i++) {
2443                 file = flist->sorted[i];
2444                 if ((am_root || am_sender) && uid_ndx) {
2445                         snprintf(uidbuf, sizeof uidbuf, " uid=%u",
2446                                  F_OWNER(file));
2447                 } else
2448                         *uidbuf = '\0';
2449                 if (gid_ndx) {
2450                         static char parens[] = "(\0)\0\0\0";
2451                         char *pp = parens + (file->flags & FLAG_SKIP_GROUP ? 0 : 3);
2452                         snprintf(gidbuf, sizeof gidbuf, " gid=%s%u%s",
2453                                  pp, F_GROUP(file), pp + 2);
2454                 } else
2455                         *gidbuf = '\0';
2456                 if (!am_sender)
2457                         snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file));
2458                 if (F_IS_ACTIVE(file)) {
2459                         root = am_sender ? NS(F_PATHNAME(file)) : depthbuf;
2460                         if ((dir = file->dirname) == NULL)
2461                                 dir = slash = "";
2462                         else
2463                                 slash = "/";
2464                         name = file->basename;
2465                         trail = S_ISDIR(file->mode) ? "/" : "";
2466                 } else
2467                         root = dir = slash = name = trail = "";
2468                 rprintf(FINFO,
2469                         "[%s] i=%d %s %s%s%s%s mode=0%o len=%.0f%s%s flags=%x\n",
2470                         who, i + flist->ndx_start,
2471                         root, dir, slash, name, trail,
2472                         (int)file->mode, (double)F_LENGTH(file),
2473                         uidbuf, gidbuf, file->flags);
2474         }
2475 }
2476
2477 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
2478 enum fnc_type { t_PATH, t_ITEM };
2479
2480 static int found_prefix;
2481
2482 /* Compare the names of two file_struct entities, similar to how strcmp()
2483  * would do if it were operating on the joined strings.
2484  *
2485  * Some differences beginning with protocol_version 29: (1) directory names
2486  * are compared with an assumed trailing slash so that they compare in a
2487  * way that would cause them to sort immediately prior to any content they
2488  * may have; (2) a directory of any name compares after a non-directory of
2489  * any name at the same depth; (3) a directory with name "." compares prior
2490  * to anything else.  These changes mean that a directory and a non-dir
2491  * with the same name will not compare as equal (protocol_version >= 29).
2492  *
2493  * The dirname component can be an empty string, but the basename component
2494  * cannot (and never is in the current codebase).  The basename component
2495  * may be NULL (for a removed item), in which case it is considered to be
2496  * after any existing item. */
2497 int f_name_cmp(const struct file_struct *f1, const struct file_struct *f2)
2498 {
2499         int dif;
2500         const uchar *c1, *c2;
2501         enum fnc_state state1, state2;
2502         enum fnc_type type1, type2;
2503         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
2504
2505         if (!f1 || !F_IS_ACTIVE(f1)) {
2506                 if (!f2 || !F_IS_ACTIVE(f2))
2507                         return 0;
2508                 return -1;
2509         }
2510         if (!f2 || !F_IS_ACTIVE(f2))
2511                 return 1;
2512
2513         c1 = (uchar*)f1->dirname;
2514         c2 = (uchar*)f2->dirname;
2515         if (c1 == c2)
2516                 c1 = c2 = NULL;
2517         if (!c1) {
2518                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2519                 c1 = (const uchar*)f1->basename;
2520                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2521                         type1 = t_ITEM;
2522                         state1 = s_TRAILING;
2523                         c1 = (uchar*)"";
2524                 } else
2525                         state1 = s_BASE;
2526         } else {
2527                 type1 = t_path;
2528                 state1 = s_DIR;
2529         }
2530         if (!c2) {
2531                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2532                 c2 = (const uchar*)f2->basename;
2533                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2534                         type2 = t_ITEM;
2535                         state2 = s_TRAILING;
2536                         c2 = (uchar*)"";
2537                 } else
2538                         state2 = s_BASE;
2539         } else {
2540                 type2 = t_path;
2541                 state2 = s_DIR;
2542         }
2543
2544         if (type1 != type2)
2545                 return type1 == t_PATH ? 1 : -1;
2546
2547         do {
2548                 if (!*c1) {
2549                         switch (state1) {
2550                         case s_DIR:
2551                                 state1 = s_SLASH;
2552                                 c1 = (uchar*)"/";
2553                                 break;
2554                         case s_SLASH:
2555                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2556                                 c1 = (const uchar*)f1->basename;
2557                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2558                                         type1 = t_ITEM;
2559                                         state1 = s_TRAILING;
2560                                         c1 = (uchar*)"";
2561                                 } else
2562                                         state1 = s_BASE;
2563                                 break;
2564                         case s_BASE:
2565                                 state1 = s_TRAILING;
2566                                 if (type1 == t_PATH) {
2567                                         c1 = (uchar*)"/";
2568                                         break;
2569                                 }
2570                                 /* FALL THROUGH */
2571                         case s_TRAILING:
2572                                 type1 = t_ITEM;
2573                                 break;
2574                         }
2575                         if (*c2 && type1 != type2)
2576                                 return type1 == t_PATH ? 1 : -1;
2577                 }
2578                 if (!*c2) {
2579                         switch (state2) {
2580                         case s_DIR:
2581                                 state2 = s_SLASH;
2582                                 c2 = (uchar*)"/";
2583                                 break;
2584                         case s_SLASH:
2585                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2586                                 c2 = (const uchar*)f2->basename;
2587                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2588                                         type2 = t_ITEM;
2589                                         state2 = s_TRAILING;
2590                                         c2 = (uchar*)"";
2591                                 } else
2592                                         state2 = s_BASE;
2593                                 break;
2594                         case s_BASE:
2595                                 state2 = s_TRAILING;
2596                                 if (type2 == t_PATH) {
2597                                         c2 = (uchar*)"/";
2598                                         break;
2599                                 }
2600                                 /* FALL THROUGH */
2601                         case s_TRAILING:
2602                                 found_prefix = 1;
2603                                 if (!*c1)
2604                                         return 0;
2605                                 type2 = t_ITEM;
2606                                 break;
2607                         }
2608                         if (type1 != type2)
2609                                 return type1 == t_PATH ? 1 : -1;
2610                 }
2611         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
2612
2613         return dif;
2614 }
2615
2616 /* Returns 1 if f1's filename has all of f2's filename as a prefix.  This does
2617  * not match if f2's basename is not an exact match of a path element in f1.
2618  * E.g. /path/foo is not a prefix of /path/foobar/baz, but /path/foobar is. */
2619 int f_name_has_prefix(const struct file_struct *f1, const struct file_struct *f2)
2620 {
2621         found_prefix = 0;
2622         f_name_cmp(f1, f2);
2623         return found_prefix;
2624 }
2625
2626 char *f_name_buf(void)
2627 {
2628         static char names[5][MAXPATHLEN];
2629         static unsigned int n;
2630
2631         n = (n + 1) % (sizeof names / sizeof names[0]);
2632
2633         return names[n];
2634 }
2635
2636 /* Return a copy of the full filename of a flist entry, using the indicated
2637  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
2638  * done because we checked the size when creating the file_struct entry.
2639  */
2640 char *f_name(const struct file_struct *f, char *fbuf)
2641 {
2642         if (!f || !F_IS_ACTIVE(f))
2643                 return NULL;
2644
2645         if (!fbuf)
2646                 fbuf = f_name_buf();
2647
2648         if (f->dirname) {
2649                 int len = strlen(f->dirname);
2650                 memcpy(fbuf, f->dirname, len);
2651                 fbuf[len] = '/';
2652                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
2653         } else
2654                 strlcpy(fbuf, f->basename, MAXPATHLEN);
2655
2656         return fbuf;
2657 }
2658
2659 /* Do a non-recursive scan of the named directory, possibly ignoring all
2660  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
2661  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
2662  * buffer (the functions we call will append names onto the end, but the old
2663  * dir value will be restored on exit). */
2664 struct file_list *get_dirlist(char *dirname, int dlen, int ignore_filter_rules)
2665 {
2666         struct file_list *dirlist;
2667         char dirbuf[MAXPATHLEN];
2668         int save_recurse = recurse;
2669         int save_xfer_dirs = xfer_dirs;
2670         int save_prune_empty_dirs = prune_empty_dirs;
2671
2672         if (dlen < 0) {
2673                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
2674                 if (dlen >= MAXPATHLEN)
2675                         return NULL;
2676                 dirname = dirbuf;
2677         }
2678
2679         dirlist = flist_new(FLIST_TEMP, "get_dirlist");
2680
2681         recurse = 0;
2682         xfer_dirs = 1;
2683         send_directory(ignore_filter_rules ? -2 : -1, dirlist, dirname, dlen, 0);
2684         xfer_dirs = save_xfer_dirs;
2685         recurse = save_recurse;
2686         if (do_progress)
2687                 flist_count_offset += dirlist->used;
2688
2689         prune_empty_dirs = 0;
2690         dirlist->sorted = dirlist->files;
2691         clean_flist(dirlist, 0);
2692         prune_empty_dirs = save_prune_empty_dirs;
2693
2694         if (verbose > 3)
2695                 output_flist(dirlist);
2696
2697         return dirlist;
2698 }