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