flist.c

   1 /*
   2  * Generate and receive file lists.
   3  *
   4  * Copyright (C) 1996 Andrew Tridgell
   5  * Copyright (C) 1996 Paul Mackerras
   6  * Copyright (C) 2001, 2002 Martin Pool <mbp@samba.org>
   7  * Copyright (C) 2002-2007 Wayne Davison
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 3 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, visit the http://fsf.org website.
  21  */
  22
  23 #include "rsync.h"
  24 #include "ifuncs.h"
  25 #include "rounding.h"
  26 #include "io.h"
  27
  28 extern int verbose;
  29 extern int am_root;
  30 extern int am_server;
  31 extern int am_daemon;
  32 extern int am_sender;
  33 extern int am_generator;
  34 extern int inc_recurse;
  35 extern int do_progress;
  36 extern int always_checksum;
  37 extern int module_id;
  38 extern int ignore_errors;
  39 extern int numeric_ids;
  40 extern int recurse;
  41 extern int use_qsort;
  42 extern int xfer_dirs;
  43 extern int filesfrom_fd;
  44 extern int one_file_system;
  45 extern int copy_dirlinks;
  46 extern int keep_dirlinks;
  47 extern int preserve_acls;
  48 extern int preserve_xattrs;
  49 extern int preserve_links;
  50 extern int preserve_hard_links;
  51 extern int preserve_devices;
  52 extern int preserve_specials;
  53 extern int uid_ndx;
  54 extern int gid_ndx;
  55 extern int eol_nulls;
  56 extern int relative_paths;
  57 extern int implied_dirs;
  58 extern int file_extra_cnt;
  59 extern int ignore_perishable;
  60 extern int non_perishable_cnt;
  61 extern int prune_empty_dirs;
  62 extern int copy_links;
  63 extern int copy_unsafe_links;
  64 extern int protocol_version;
  65 extern int sanitize_paths;
  66 extern int need_unsorted_flist;
  67 extern int unsort_ndx;
  68 extern struct stats stats;
  69 extern char *filesfrom_host;
  70
  71 extern char curr_dir[MAXPATHLEN];
  72
  73 extern struct chmod_mode_struct *chmod_modes;
  74
  75 extern struct filter_list_struct filter_list;
  76 extern struct filter_list_struct server_filter_list;
  77
  78 #ifdef ICONV_OPTION
  79 extern int filesfrom_convert;
  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 = -1;
  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 #define NORMAL_NAME 0
  96 #define SLASH_ENDING_NAME 1
  97 #define DOT_NAME 2
  98
  99 /* Starting from protocol version 26, we always use 64-bit ino_t and dev_t
 100  * internally, even if this platform does not allow files to have 64-bit inums.
 101  * The only exception is if we're on a platform with no 64-bit type at all.
 102  *
 103  * Because we use read_longint() to get these off the wire, if you transfer
 104  * devices or (for protocols < 30) hardlinks with dev or inum > 2**32 to a
 105  * machine with no 64-bit types then you will get an overflow error.
 106  *
 107  * Note that if you transfer devices from a 64-bit-devt machine (say, Solaris)
 108  * to a 32-bit-devt machine (say, Linux-2.2/x86) then the device numbers will
 109  * be truncated.  But it's a kind of silly thing to do anyhow. */
 110
 111 /* The tmp_* vars are used as a cache area by make_file() to store data
 112  * that the sender doesn't need to remember in its file list.  The data
 113  * will survive just long enough to be used by send_file_entry(). */
 114 static dev_t tmp_rdev;
 115 #ifdef SUPPORT_HARD_LINKS
 116 static int64 tmp_dev, tmp_ino;
 117 #endif
 118 static char tmp_sum[MAX_DIGEST_LEN];
 119
 120 static char empty_sum[MAX_DIGEST_LEN];
 121 static int flist_count_offset; /* for --delete --progress */
 122 static int dir_count = 0;
 123 static int high_hlink_ndx;
 124
 125 static void clean_flist(struct file_list *flist, int strip_root);
 126 static void output_flist(struct file_list *flist);
 127
 128 void init_flist(void)
 129 {
 130         if (verbose > 4) {
 131                 rprintf(FINFO, "FILE_STRUCT_LEN=%d, EXTRA_LEN=%d\n",
 132                         (int)FILE_STRUCT_LEN, (int)EXTRA_LEN);
 133         }
 134         checksum_len = protocol_version < 21 ? 2
 135                      : protocol_version < 30 ? MD4_DIGEST_LEN
 136                      : MD5_DIGEST_LEN;
 137 }
 138
 139 static int show_filelist_p(void)
 140 {
 141         return verbose && xfer_dirs && !am_server && !inc_recurse;
 142 }
 143
 144 static void start_filelist_progress(char *kind)
 145 {
 146         rprintf(FCLIENT, "%s ... ", kind);
 147         if (verbose > 1 || do_progress)
 148                 rprintf(FCLIENT, "\n");
 149         rflush(FINFO);
 150 }
 151
 152 static void emit_filelist_progress(int count)
 153 {
 154         rprintf(FCLIENT, " %d files...\r", count);
 155 }
 156
 157 static void maybe_emit_filelist_progress(int count)
 158 {
 159         if (do_progress && show_filelist_p() && (count % 100) == 0)
 160                 emit_filelist_progress(count);
 161 }
 162
 163 static void finish_filelist_progress(const struct file_list *flist)
 164 {
 165         if (do_progress) {
 166                 /* This overwrites the progress line */
 167                 rprintf(FINFO, "%d file%sto consider\n",
 168                         flist->used, flist->used == 1 ? " " : "s ");
 169         } else
 170                 rprintf(FINFO, "done\n");
 171 }
 172
 173 void show_flist_stats(void)
 174 {
 175         /* Nothing yet */
 176 }
 177
 178 /* Stat either a symlink or its referent, depending on the settings of
 179  * copy_links, copy_unsafe_links, etc.  Returns -1 on error, 0 on success.
 180  *
 181  * If path is the name of a symlink, then the linkbuf buffer (which must hold
 182  * MAXPATHLEN chars) will be set to the symlink's target string.
 183  *
 184  * The stat structure pointed to by stp will contain information about the
 185  * link or the referent as appropriate, if they exist. */
 186 static int readlink_stat(const char *path, STRUCT_STAT *stp, char *linkbuf)
 187 {
 188 #ifdef SUPPORT_LINKS
 189         if (link_stat(path, stp, copy_dirlinks) < 0)
 190                 return -1;
 191         if (S_ISLNK(stp->st_mode)) {
 192                 int llen = readlink(path, linkbuf, MAXPATHLEN - 1);
 193                 if (llen < 0)
 194                         return -1;
 195                 linkbuf[llen] = '\0';
 196                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 197                         if (verbose > 1) {
 198                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 199                                         path, linkbuf);
 200                         }
 201                         return x_stat(path, stp, NULL);
 202                 }
 203         }
 204         return 0;
 205 #else
 206         return x_stat(path, stp, NULL);
 207 #endif
 208 }
 209
 210 int link_stat(const char *path, STRUCT_STAT *stp, int follow_dirlinks)
 211 {
 212 #ifdef SUPPORT_LINKS
 213         if (copy_links)
 214                 return x_stat(path, stp, NULL);
 215         if (x_lstat(path, stp, NULL) < 0)
 216                 return -1;
 217         if (follow_dirlinks && S_ISLNK(stp->st_mode)) {
 218                 STRUCT_STAT st;
 219                 if (x_stat(path, &st, NULL) == 0 && S_ISDIR(st.st_mode))
 220                         *stp = st;
 221         }
 222         return 0;
 223 #else
 224         return x_stat(path, stp, NULL);
 225 #endif
 226 }
 227
 228 /* This function is used to check if a file should be included/excluded
 229  * from the list of files based on its name and type etc.  The value of
 230  * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
 231 static int is_excluded(char *fname, int is_dir, int filter_level)
 232 {
 233 #if 0 /* This currently never happens, so avoid a useless compare. */
 234         if (filter_level == NO_FILTERS)
 235                 return 0;
 236 #endif
 237         if (fname) {
 238                 /* never exclude '.', even if somebody does --exclude '*' */
 239                 if (fname[0] == '.' && !fname[1])
 240                         return 0;
 241                 /* Handle the -R version of the '.' dir. */
 242                 if (fname[0] == '/') {
 243                         int len = strlen(fname);
 244                         if (fname[len-1] == '.' && fname[len-2] == '/')
 245                                 return 0;
 246                 }
 247         }
 248         if (server_filter_list.head
 249             && check_filter(&server_filter_list, fname, is_dir) < 0)
 250                 return 1;
 251         if (filter_level != ALL_FILTERS)
 252                 return 0;
 253         if (filter_list.head
 254             && check_filter(&filter_list, fname, is_dir) < 0)
 255                 return 1;
 256         return 0;
 257 }
 258
 259 static void send_directory(int f, struct file_list *flist,
 260                            char *fbuf, int len, int flags);
 261
 262 static const char *pathname, *orig_dir;
 263 static int pathname_len;
 264
 265
 266 /* Make sure flist can hold at least flist->used + extra entries. */
 267 static void flist_expand(struct file_list *flist, int extra)
 268 {
 269         struct file_struct **new_ptr;
 270
 271         if (flist->used + extra <= flist->malloced)
 272                 return;
 273
 274         if (flist->malloced < FLIST_START)
 275                 flist->malloced = FLIST_START;
 276         else if (flist->malloced >= FLIST_LINEAR)
 277                 flist->malloced += FLIST_LINEAR;
 278         else
 279                 flist->malloced *= 2;
 280
 281         /* In case count jumped or we are starting the list
 282          * with a known size just set it. */
 283         if (flist->malloced < flist->used + extra)
 284                 flist->malloced = flist->used + extra;
 285
 286         new_ptr = realloc_array(flist->files, struct file_struct *,
 287                                 flist->malloced);
 288
 289         if (verbose >= 2 && flist->malloced != FLIST_START) {
 290                 rprintf(FCLIENT, "[%s] expand file_list pointer array to %.0f bytes, did%s move\n",
 291                     who_am_i(),
 292                     (double)sizeof flist->files[0] * flist->malloced,
 293                     (new_ptr == flist->files) ? " not" : "");
 294         }
 295
 296         flist->files = new_ptr;
 297
 298         if (!flist->files)
 299                 out_of_memory("flist_expand");
 300 }
 301
 302 static void flist_done_allocating(struct file_list *flist)
 303 {
 304         void *ptr = pool_boundary(flist->file_pool, 8*1024);
 305         if (flist->pool_boundary == ptr)
 306                 flist->pool_boundary = NULL; /* list didn't use any pool memory */
 307         else
 308                 flist->pool_boundary = ptr;
 309 }
 310
 311 int push_pathname(const char *dir, int len)
 312 {
 313         if (dir == pathname)
 314                 return 1;
 315
 316         if (!orig_dir)
 317                 orig_dir = strdup(curr_dir);
 318
 319         if (pathname && !pop_dir(orig_dir)) {
 320                 rsyserr(FERROR, errno, "pop_dir %s failed",
 321                         full_fname(orig_dir));
 322                 exit_cleanup(RERR_FILESELECT);
 323         }
 324
 325         if (dir && !push_dir(dir, 0)) {
 326                 io_error |= IOERR_GENERAL;
 327                 rsyserr(FERROR, errno, "push_dir %s failed in %s",
 328                         full_fname(dir), curr_dir);
 329                 return 0;
 330         }
 331
 332         pathname = dir;
 333         pathname_len = len >= 0 ? len : dir ? (int)strlen(dir) : 0;
 334
 335         return 1;
 336 }
 337
 338 static void send_file_entry(int f, struct file_struct *file, int ndx, int first_ndx)
 339 {
 340         static time_t modtime;
 341         static mode_t mode;
 342 #ifdef SUPPORT_HARD_LINKS
 343         static int64 dev;
 344 #endif
 345         static dev_t rdev;
 346         static uint32 rdev_major;
 347         static uid_t uid;
 348         static gid_t gid;
 349         static char *user_name, *group_name;
 350         static char lastname[MAXPATHLEN];
 351         char fname[MAXPATHLEN];
 352         int first_hlink_ndx = -1;
 353         int l1, l2;
 354         int xflags;
 355
 356 #ifdef ICONV_OPTION
 357         if (ic_send != (iconv_t)-1) {
 358                 xbuf outbuf, inbuf;
 359
 360                 INIT_CONST_XBUF(outbuf, fname);
 361
 362                 if (file->dirname) {
 363                         INIT_XBUF_STRLEN(inbuf, (char*)file->dirname);
 364                         outbuf.size -= 2; /* Reserve room for '/' & 1 more char. */
 365                         if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0)
 366                                 goto convert_error;
 367                         outbuf.size += 2;
 368                         outbuf.buf[outbuf.len++] = '/';
 369                 }
 370
 371                 INIT_XBUF_STRLEN(inbuf, (char*)file->basename);
 372                 if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0) {
 373                   convert_error:
 374                         io_error |= IOERR_GENERAL;
 375                         rprintf(FINFO,
 376                             "[%s] cannot convert filename: %s (%s)\n",
 377                             who_am_i(), f_name(file, fname), strerror(errno));
 378                         return;
 379                 }
 380                 outbuf.buf[outbuf.len] = '\0';
 381         } else
 382 #endif
 383                 f_name(file, fname);
 384
 385         /* Initialize starting value of xflags. */
 386         if (protocol_version >= 30 && S_ISDIR(file->mode)) {
 387                 if (file->flags & FLAG_CONTENT_DIR)
 388                         xflags = file->flags & FLAG_TOP_DIR;
 389                 else if (file->flags & FLAG_IMPLIED_DIR)
 390                         xflags = XMIT_TOP_DIR | XMIT_NO_CONTENT_DIR;
 391                 else
 392                         xflags = XMIT_NO_CONTENT_DIR;
 393         } else
 394                 xflags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */
 395
 396         if (file->mode == mode)
 397                 xflags |= XMIT_SAME_MODE;
 398         else
 399                 mode = file->mode;
 400
 401         if ((preserve_devices && IS_DEVICE(mode))
 402          || (preserve_specials && IS_SPECIAL(mode))) {
 403                 if (protocol_version < 28) {
 404                         if (tmp_rdev == rdev)
 405                                 xflags |= XMIT_SAME_RDEV_pre28;
 406                         else
 407                                 rdev = tmp_rdev;
 408                 } else {
 409                         rdev = tmp_rdev;
 410                         if ((uint32)major(rdev) == rdev_major)
 411                                 xflags |= XMIT_SAME_RDEV_MAJOR;
 412                         else
 413                                 rdev_major = major(rdev);
 414                         if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu)
 415                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
 416                 }
 417         } else if (protocol_version < 28)
 418                 rdev = MAKEDEV(0, 0);
 419         if (uid_ndx) {
 420                 if ((uid_t)F_OWNER(file) == uid && *lastname)
 421                         xflags |= XMIT_SAME_UID;
 422                 else {
 423                         uid = F_OWNER(file);
 424                         if (uid_ndx && !numeric_ids) {
 425                                 user_name = add_uid(uid);
 426                                 if (inc_recurse && user_name)
 427                                         xflags |= XMIT_USER_NAME_FOLLOWS;
 428                         }
 429                 }
 430         }
 431         if (gid_ndx) {
 432                 if ((gid_t)F_GROUP(file) == gid && *lastname)
 433                         xflags |= XMIT_SAME_GID;
 434                 else {
 435                         gid = F_GROUP(file);
 436                         if (gid_ndx && !numeric_ids) {
 437                                 group_name = add_gid(gid);
 438                                 if (inc_recurse && group_name)
 439                                         xflags |= XMIT_GROUP_NAME_FOLLOWS;
 440                         }
 441                 }
 442         }
 443         if (file->modtime == modtime)
 444                 xflags |= XMIT_SAME_TIME;
 445         else
 446                 modtime = file->modtime;
 447
 448 #ifdef SUPPORT_HARD_LINKS
 449         if (tmp_dev != 0) {
 450                 if (protocol_version >= 30) {
 451                         struct ht_int64_node *np = idev_find(tmp_dev, tmp_ino);
 452                         first_hlink_ndx = (int32)(long)np->data - 1;
 453                         if (first_hlink_ndx < 0) {
 454                                 high_hlink_ndx = ndx + first_ndx;
 455                                 np->data = (void*)(long)(high_hlink_ndx + 1);
 456                                 xflags |= XMIT_HLINK_FIRST;
 457                         }
 458                         xflags |= XMIT_HLINKED;
 459                 } else {
 460                         if (tmp_dev == dev) {
 461                                 if (protocol_version >= 28)
 462                                         xflags |= XMIT_SAME_DEV_pre30;
 463                         } else
 464                                 dev = tmp_dev;
 465                         xflags |= XMIT_HLINKED;
 466                 }
 467         }
 468 #endif
 469
 470         for (l1 = 0;
 471             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 472             l1++) {}
 473         l2 = strlen(fname+l1);
 474
 475         if (l1 > 0)
 476                 xflags |= XMIT_SAME_NAME;
 477         if (l2 > 255)
 478                 xflags |= XMIT_LONG_NAME;
 479
 480         /* We must make sure we don't send a zero flag byte or the
 481          * other end will terminate the flist transfer.  Note that
 482          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 483          * it's harmless way to add a bit to the first flag byte. */
 484         if (protocol_version >= 28) {
 485                 if (!xflags && !S_ISDIR(mode))
 486                         xflags |= XMIT_TOP_DIR;
 487                 if ((xflags & 0xFF00) || !xflags) {
 488                         xflags |= XMIT_EXTENDED_FLAGS;
 489                         write_shortint(f, xflags);
 490                 } else
 491                         write_byte(f, xflags);
 492         } else {
 493                 if (!(xflags & 0xFF))
 494                         xflags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
 495                 write_byte(f, xflags);
 496         }
 497         if (xflags & XMIT_SAME_NAME)
 498                 write_byte(f, l1);
 499         if (xflags & XMIT_LONG_NAME)
 500                 write_varint30(f, l2);
 501         else
 502                 write_byte(f, l2);
 503         write_buf(f, fname + l1, l2);
 504
 505         if (first_hlink_ndx >= 0) {
 506                 write_varint(f, first_hlink_ndx);
 507                 if (first_hlink_ndx >= first_ndx)
 508                         goto the_end;
 509         }
 510
 511         write_varlong30(f, F_LENGTH(file), 3);
 512         if (!(xflags & XMIT_SAME_TIME)) {
 513                 if (protocol_version >= 30)
 514                         write_varlong(f, modtime, 4);
 515                 else
 516                         write_int(f, modtime);
 517         }
 518         if (!(xflags & XMIT_SAME_MODE))
 519                 write_int(f, to_wire_mode(mode));
 520         if (uid_ndx && !(xflags & XMIT_SAME_UID)) {
 521                 if (protocol_version < 30)
 522                         write_int(f, uid);
 523                 else {
 524                         write_varint(f, uid);
 525                         if (xflags & XMIT_USER_NAME_FOLLOWS) {
 526                                 int len = strlen(user_name);
 527                                 write_byte(f, len);
 528                                 write_buf(f, user_name, len);
 529                         }
 530                 }
 531         }
 532         if (gid_ndx && !(xflags & XMIT_SAME_GID)) {
 533                 if (protocol_version < 30)
 534                         write_int(f, gid);
 535                 else {
 536                         write_varint(f, gid);
 537                         if (xflags & XMIT_GROUP_NAME_FOLLOWS) {
 538                                 int len = strlen(group_name);
 539                                 write_byte(f, len);
 540                                 write_buf(f, group_name, len);
 541                         }
 542                 }
 543         }
 544         if ((preserve_devices && IS_DEVICE(mode))
 545          || (preserve_specials && IS_SPECIAL(mode))) {
 546                 if (protocol_version < 28) {
 547                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 548                                 write_int(f, (int)rdev);
 549                 } else {
 550                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 551                                 write_varint30(f, major(rdev));
 552                         if (protocol_version >= 30)
 553                                 write_varint(f, minor(rdev));
 554                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 555                                 write_byte(f, minor(rdev));
 556                         else
 557                                 write_int(f, minor(rdev));
 558                 }
 559         }
 560
 561 #ifdef SUPPORT_LINKS
 562         if (preserve_links && S_ISLNK(mode)) {
 563                 const char *sl = F_SYMLINK(file);
 564                 int len = strlen(sl);
 565                 write_varint30(f, len);
 566                 write_buf(f, sl, len);
 567         }
 568 #endif
 569
 570 #ifdef SUPPORT_HARD_LINKS
 571         if (tmp_dev != 0 && protocol_version < 30) {
 572                 if (protocol_version < 26) {
 573                         /* 32-bit dev_t and ino_t */
 574                         write_int(f, (int32)dev);
 575                         write_int(f, (int32)tmp_ino);
 576                 } else {
 577                         /* 64-bit dev_t and ino_t */
 578                         if (!(xflags & XMIT_SAME_DEV_pre30))
 579                                 write_longint(f, dev);
 580                         write_longint(f, tmp_ino);
 581                 }
 582         }
 583 #endif
 584
 585         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 586                 const char *sum;
 587                 if (S_ISREG(mode))
 588                         sum = tmp_sum;
 589                 else {
 590                         /* Prior to 28, we sent a useless set of nulls. */
 591                         sum = empty_sum;
 592                 }
 593                 write_buf(f, sum, checksum_len);
 594         }
 595
 596   the_end:
 597         strlcpy(lastname, fname, MAXPATHLEN);
 598
 599         if (S_ISREG(mode) || S_ISLNK(mode))
 600                 stats.total_size += F_LENGTH(file);
 601 }
 602
 603 static struct file_struct *recv_file_entry(struct file_list *flist,
 604                                            int xflags, int f)
 605 {
 606         static int64 modtime;
 607         static mode_t mode;
 608 #ifdef SUPPORT_HARD_LINKS
 609         static int64 dev;
 610 #endif
 611         static dev_t rdev;
 612         static uint32 rdev_major;
 613         static uid_t uid;
 614         static gid_t gid;
 615         static uint16 gid_flags;
 616         static char lastname[MAXPATHLEN], *lastdir;
 617         static int lastdir_depth, lastdir_len = -1;
 618         static unsigned int del_hier_name_len = 0;
 619         static int in_del_hier = 0;
 620         char thisname[MAXPATHLEN];
 621         unsigned int l1 = 0, l2 = 0;
 622         int alloc_len, basename_len, linkname_len;
 623         int extra_len = file_extra_cnt * EXTRA_LEN;
 624         int first_hlink_ndx = -1;
 625         OFF_T file_length;
 626         const char *basename;
 627         struct file_struct *file;
 628         alloc_pool_t *pool;
 629         char *bp;
 630
 631         if (xflags & XMIT_SAME_NAME)
 632                 l1 = read_byte(f);
 633
 634         if (xflags & XMIT_LONG_NAME)
 635                 l2 = read_varint30(f);
 636         else
 637                 l2 = read_byte(f);
 638
 639         if (l2 >= MAXPATHLEN - l1) {
 640                 rprintf(FERROR,
 641                         "overflow: xflags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
 642                         xflags, l1, l2, lastname, who_am_i());
 643                 overflow_exit("recv_file_entry");
 644         }
 645
 646         strlcpy(thisname, lastname, l1 + 1);
 647         read_sbuf(f, &thisname[l1], l2);
 648         thisname[l1 + l2] = 0;
 649
 650         /* Abuse basename_len for a moment... */
 651         basename_len = strlcpy(lastname, thisname, MAXPATHLEN);
 652
 653 #ifdef ICONV_OPTION
 654         if (ic_recv != (iconv_t)-1) {
 655                 xbuf outbuf, inbuf;
 656
 657                 INIT_CONST_XBUF(outbuf, thisname);
 658                 INIT_XBUF(inbuf, lastname, basename_len, -1);
 659
 660                 if (iconvbufs(ic_recv, &inbuf, &outbuf, 0) < 0) {
 661                         io_error |= IOERR_GENERAL;
 662                         rprintf(FINFO,
 663                             "[%s] cannot convert filename: %s (%s)\n",
 664                             who_am_i(), lastname, strerror(errno));
 665                         outbuf.len = 0;
 666                 }
 667                 outbuf.buf[outbuf.len] = '\0';
 668         }
 669 #endif
 670
 671         clean_fname(thisname, 0);
 672
 673         if (sanitize_paths)
 674                 sanitize_path(thisname, thisname, "", 0, NULL);
 675
 676         if ((basename = strrchr(thisname, '/')) != NULL) {
 677                 int len = basename++ - thisname;
 678                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
 679                         lastdir = new_array(char, len + 1);
 680                         memcpy(lastdir, thisname, len);
 681                         lastdir[len] = '\0';
 682                         lastdir_len = len;
 683                         lastdir_depth = count_dir_elements(lastdir);
 684                 }
 685         } else
 686                 basename = thisname;
 687         basename_len = strlen(basename) + 1; /* count the '\0' */
 688
 689 #ifdef SUPPORT_HARD_LINKS
 690         if (protocol_version >= 30
 691          && BITS_SETnUNSET(xflags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
 692                 first_hlink_ndx = read_varint(f);
 693                 if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->ndx_start + flist->used) {
 694                         rprintf(FERROR,
 695                                 "hard-link reference out of range: %d (%d)\n",
 696                                 first_hlink_ndx, flist->ndx_start + flist->used);
 697                         exit_cleanup(RERR_PROTOCOL);
 698                 }
 699                 if (first_hlink_ndx >= flist->ndx_start) {
 700                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 701                         file_length = F_LENGTH(first);
 702                         modtime = first->modtime;
 703                         mode = first->mode;
 704                         if (uid_ndx)
 705                                 uid = F_OWNER(first);
 706                         if (gid_ndx)
 707                                 gid = F_GROUP(first);
 708                         if ((preserve_devices && IS_DEVICE(mode))
 709                          || (preserve_specials && IS_SPECIAL(mode))) {
 710                                 uint32 *devp = F_RDEV_P(first);
 711                                 rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
 712                                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 713                         }
 714                         if (preserve_links && S_ISLNK(mode))
 715                                 linkname_len = strlen(F_SYMLINK(first)) + 1;
 716                         else
 717                                 linkname_len = 0;
 718                         goto create_object;
 719                 }
 720         }
 721 #endif
 722
 723         file_length = read_varlong30(f, 3);
 724         if (!(xflags & XMIT_SAME_TIME)) {
 725                 if (protocol_version >= 30) {
 726                         modtime = read_varlong(f, 4);
 727 #if SIZEOF_TIME_T < SIZEOF_INT64
 728                         if ((modtime > INT_MAX || modtime < INT_MIN) && !am_generator) {
 729                                 rprintf(FERROR,
 730                                     "Time value of %s truncated on receiver.\n",
 731                                     lastname);
 732                         }
 733 #endif
 734                 } else
 735                         modtime = read_int(f);
 736         }
 737         if (!(xflags & XMIT_SAME_MODE))
 738                 mode = from_wire_mode(read_int(f));
 739
 740         if (chmod_modes && !S_ISLNK(mode))
 741                 mode = tweak_mode(mode, chmod_modes);
 742
 743         if (uid_ndx && !(xflags & XMIT_SAME_UID)) {
 744                 if (protocol_version < 30)
 745                         uid = (uid_t)read_int(f);
 746                 else {
 747                         uid = (uid_t)read_varint(f);
 748                         if (xflags & XMIT_USER_NAME_FOLLOWS)
 749                                 uid = recv_user_name(f, uid);
 750                         else if (inc_recurse && am_root && !numeric_ids)
 751                                 uid = match_uid(uid);
 752                 }
 753         }
 754         if (gid_ndx && !(xflags & XMIT_SAME_GID)) {
 755                 if (protocol_version < 30)
 756                         gid = (gid_t)read_int(f);
 757                 else {
 758                         gid = (gid_t)read_varint(f);
 759                         gid_flags = 0;
 760                         if (xflags & XMIT_GROUP_NAME_FOLLOWS)
 761                                 gid = recv_group_name(f, gid, &gid_flags);
 762                         else if (inc_recurse && (!am_root || !numeric_ids))
 763                                 gid = match_gid(gid, &gid_flags);
 764                 }
 765         }
 766
 767         if ((preserve_devices && IS_DEVICE(mode))
 768          || (preserve_specials && IS_SPECIAL(mode))) {
 769                 if (protocol_version < 28) {
 770                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 771                                 rdev = (dev_t)read_int(f);
 772                 } else {
 773                         uint32 rdev_minor;
 774                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 775                                 rdev_major = read_varint30(f);
 776                         if (protocol_version >= 30)
 777                                 rdev_minor = read_varint(f);
 778                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 779                                 rdev_minor = read_byte(f);
 780                         else
 781                                 rdev_minor = read_int(f);
 782                         rdev = MAKEDEV(rdev_major, rdev_minor);
 783                 }
 784                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 785                 file_length = 0;
 786         } else if (protocol_version < 28)
 787                 rdev = MAKEDEV(0, 0);
 788
 789 #ifdef SUPPORT_LINKS
 790         if (preserve_links && S_ISLNK(mode)) {
 791                 linkname_len = read_varint30(f) + 1; /* count the '\0' */
 792                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 793                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 794                                 linkname_len - 1);
 795                         overflow_exit("recv_file_entry");
 796                 }
 797         }
 798         else
 799 #endif
 800                 linkname_len = 0;
 801
 802 #ifdef SUPPORT_HARD_LINKS
 803   create_object:
 804         if (preserve_hard_links) {
 805                 if (protocol_version < 28 && S_ISREG(mode))
 806                         xflags |= XMIT_HLINKED;
 807                 if (xflags & XMIT_HLINKED)
 808                         extra_len += (inc_recurse+1) * EXTRA_LEN;
 809         }
 810 #endif
 811
 812 #ifdef SUPPORT_ACLS
 813         /* We need one or two index int32s when we're preserving ACLs. */
 814         if (preserve_acls)
 815                 extra_len += (S_ISDIR(mode) ? 2 : 1) * EXTRA_LEN;
 816 #endif
 817
 818         if (always_checksum && S_ISREG(mode))
 819                 extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
 820
 821         if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
 822                 extra_len += EXTRA_LEN;
 823
 824 #if EXTRA_ROUNDING > 0
 825         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
 826                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
 827 #endif
 828
 829         if (inc_recurse && S_ISDIR(mode)) {
 830                 if (one_file_system) {
 831                         /* Room to save the dir's device for -x */
 832                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 833                 }
 834                 pool = dir_flist->file_pool;
 835         } else
 836                 pool = flist->file_pool;
 837
 838         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
 839                   + linkname_len;
 840         bp = pool_alloc(pool, alloc_len, "recv_file_entry");
 841
 842         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
 843         bp += extra_len;
 844         file = (struct file_struct *)bp;
 845         bp += FILE_STRUCT_LEN;
 846
 847         memcpy(bp, basename, basename_len);
 848         bp += basename_len + linkname_len; /* skip space for symlink too */
 849
 850 #ifdef SUPPORT_HARD_LINKS
 851         if (xflags & XMIT_HLINKED)
 852                 file->flags |= FLAG_HLINKED;
 853 #endif
 854         file->modtime = (time_t)modtime;
 855         file->len32 = (uint32)file_length;
 856         if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
 857                 file->flags |= FLAG_LENGTH64;
 858                 OPT_EXTRA(file, 0)->unum = (uint32)(file_length >> 32);
 859         }
 860         file->mode = mode;
 861         if (uid_ndx)
 862                 F_OWNER(file) = uid;
 863         if (gid_ndx) {
 864                 F_GROUP(file) = gid;
 865                 file->flags |= gid_flags;
 866         }
 867         if (unsort_ndx)
 868                 F_NDX(file) = flist->used + flist->ndx_start;
 869
 870         if (basename != thisname) {
 871                 file->dirname = lastdir;
 872                 F_DEPTH(file) = lastdir_depth + 1;
 873         } else
 874                 F_DEPTH(file) = 1;
 875
 876         if (S_ISDIR(mode)) {
 877                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
 878                         F_DEPTH(file)--;
 879                 if (protocol_version >= 30) {
 880                         if (!(xflags & XMIT_NO_CONTENT_DIR)) {
 881                                 if (xflags & XMIT_TOP_DIR)
 882                                         file->flags |= FLAG_TOP_DIR;
 883                                 file->flags |= FLAG_CONTENT_DIR;
 884                         } else if (xflags & XMIT_TOP_DIR)
 885                                 file->flags |= FLAG_IMPLIED_DIR;
 886                 } else if (xflags & XMIT_TOP_DIR) {
 887                         in_del_hier = recurse;
 888                         del_hier_name_len = F_DEPTH(file) == 0 ? 0 : l1 + l2;
 889                         if (relative_paths && del_hier_name_len > 2
 890                             && lastname[del_hier_name_len-1] == '.'
 891                             && lastname[del_hier_name_len-2] == '/')
 892                                 del_hier_name_len -= 2;
 893                         file->flags |= FLAG_TOP_DIR | FLAG_CONTENT_DIR;
 894                 } else if (in_del_hier) {
 895                         if (!relative_paths || !del_hier_name_len
 896                          || (l1 >= del_hier_name_len
 897                           && lastname[del_hier_name_len] == '/'))
 898                                 file->flags |= FLAG_CONTENT_DIR;
 899                         else
 900                                 in_del_hier = 0;
 901                 }
 902         }
 903
 904         if ((preserve_devices && IS_DEVICE(mode))
 905          || (preserve_specials && IS_SPECIAL(mode))) {
 906                 uint32 *devp = F_RDEV_P(file);
 907                 DEV_MAJOR(devp) = major(rdev);
 908                 DEV_MINOR(devp) = minor(rdev);
 909         }
 910
 911 #ifdef SUPPORT_LINKS
 912         if (linkname_len) {
 913                 bp = (char*)file->basename + basename_len;
 914                 if (first_hlink_ndx >= flist->ndx_start) {
 915                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 916                         memcpy(bp, F_SYMLINK(first), linkname_len);
 917                 } else
 918                         read_sbuf(f, bp, linkname_len - 1);
 919                 if (sanitize_paths)
 920                         sanitize_path(bp, bp, "", lastdir_depth, NULL);
 921         }
 922 #endif
 923
 924 #ifdef SUPPORT_HARD_LINKS
 925         if (preserve_hard_links && xflags & XMIT_HLINKED) {
 926                 if (protocol_version >= 30) {
 927                         if (xflags & XMIT_HLINK_FIRST) {
 928                                 high_hlink_ndx = flist->ndx_start + flist->used;
 929                                 F_HL_GNUM(file) = high_hlink_ndx;
 930                         } else
 931                                 F_HL_GNUM(file) = first_hlink_ndx;
 932                 } else {
 933                         static int32 cnt = 0;
 934                         struct ht_int64_node *np;
 935                         int64 ino;
 936                         int32 ndx;
 937                         if (protocol_version < 26) {
 938                                 dev = read_int(f);
 939                                 ino = read_int(f);
 940                         } else {
 941                                 if (!(xflags & XMIT_SAME_DEV_pre30))
 942                                         dev = read_longint(f);
 943                                 ino = read_longint(f);
 944                         }
 945                         np = idev_find(dev, ino);
 946                         ndx = (int32)(long)np->data - 1;
 947                         if (ndx < 0) {
 948                                 ndx = cnt++;
 949                                 np->data = (void*)(long)cnt;
 950                         }
 951                         F_HL_GNUM(file) = ndx;
 952                 }
 953         }
 954 #endif
 955
 956         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 957                 if (S_ISREG(mode))
 958                         bp = F_SUM(file);
 959                 else {
 960                         /* Prior to 28, we get a useless set of nulls. */
 961                         bp = tmp_sum;
 962                 }
 963                 if (first_hlink_ndx >= flist->ndx_start) {
 964                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 965                         memcpy(bp, F_SUM(first), checksum_len);
 966                 } else
 967                         read_buf(f, bp, checksum_len);
 968         }
 969
 970 #ifdef SUPPORT_ACLS
 971         if (preserve_acls && !S_ISLNK(mode))
 972                 receive_acl(file, f);
 973 #endif
 974 #ifdef SUPPORT_XATTRS
 975         if (preserve_xattrs)
 976                 receive_xattr(file, f );
 977 #endif
 978
 979         if (S_ISREG(mode) || S_ISLNK(mode))
 980                 stats.total_size += file_length;
 981
 982         return file;
 983 }
 984
 985 /* Create a file_struct for a named file by reading its stat() information
 986  * and performing extensive checks against global options.
 987  *
 988  * Returns a pointer to the new file struct, or NULL if there was an error
 989  * or this file should be excluded. */
 990 struct file_struct *make_file(const char *fname, struct file_list *flist,
 991                               STRUCT_STAT *stp, int flags, int filter_level)
 992 {
 993         static char *lastdir;
 994         static int lastdir_len = -1;
 995         struct file_struct *file;
 996         char thisname[MAXPATHLEN];
 997         char linkname[MAXPATHLEN];
 998         int alloc_len, basename_len, linkname_len;
 999         int extra_len = file_extra_cnt * EXTRA_LEN;
1000         const char *basename;
1001         alloc_pool_t *pool;
1002         STRUCT_STAT st;
1003         char *bp;
1004
1005         if (strlcpy(thisname, fname, sizeof thisname) >= sizeof thisname) {
1006                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
1007                 return NULL;
1008         }
1009         clean_fname(thisname, 0);
1010         if (sanitize_paths)
1011                 sanitize_path(thisname, thisname, "", 0, NULL);
1012
1013         if (stp && S_ISDIR(stp->st_mode)) {
1014                 st = *stp; /* Needed for "symlink/." with --relative. */
1015                 *linkname = '\0'; /* make IBM code checker happy */
1016         } else if (readlink_stat(thisname, &st, linkname) != 0) {
1017                 int save_errno = errno;
1018                 /* See if file is excluded before reporting an error. */
1019                 if (filter_level != NO_FILTERS
1020                  && (is_excluded(thisname, 0, filter_level)
1021                   || is_excluded(thisname, 1, filter_level))) {
1022                         if (ignore_perishable && save_errno != ENOENT)
1023                                 non_perishable_cnt++;
1024                         return NULL;
1025                 }
1026                 if (save_errno == ENOENT) {
1027 #ifdef SUPPORT_LINKS
1028                         /* Avoid "vanished" error if symlink points nowhere. */
1029                         if (copy_links && x_lstat(thisname, &st, NULL) == 0
1030                             && S_ISLNK(st.st_mode)) {
1031                                 io_error |= IOERR_GENERAL;
1032                                 rprintf(FERROR, "symlink has no referent: %s\n",
1033                                         full_fname(thisname));
1034                         } else
1035 #endif
1036                         {
1037                                 enum logcode c = am_daemon && protocol_version < 28
1038                                     ? FERROR : FINFO;
1039                                 io_error |= IOERR_VANISHED;
1040                                 rprintf(c, "file has vanished: %s\n",
1041                                         full_fname(thisname));
1042                         }
1043                 } else {
1044                         io_error |= IOERR_GENERAL;
1045                         rsyserr(FERROR, save_errno, "readlink %s failed",
1046                                 full_fname(thisname));
1047                 }
1048                 return NULL;
1049         }
1050
1051         /* backup.c calls us with filter_level set to NO_FILTERS. */
1052         if (filter_level == NO_FILTERS)
1053                 goto skip_filters;
1054
1055         if (S_ISDIR(st.st_mode)) {
1056                 if (!xfer_dirs) {
1057                         rprintf(FINFO, "skipping directory %s\n", thisname);
1058                         return NULL;
1059                 }
1060                 /* -x only affects dirs because we need to avoid recursing
1061                  * into a mount-point directory, not to avoid copying a
1062                  * symlinked file if -L (or similar) was specified. */
1063                 if (one_file_system && st.st_dev != filesystem_dev
1064                  && BITS_SETnUNSET(flags, FLAG_CONTENT_DIR, FLAG_TOP_DIR)) {
1065                         if (one_file_system > 1) {
1066                                 if (verbose > 1) {
1067                                         rprintf(FINFO,
1068                                             "[%s] skipping mount-point dir %s\n",
1069                                             who_am_i(), thisname);
1070                                 }
1071                                 return NULL;
1072                         }
1073                         flags |= FLAG_MOUNT_DIR;
1074                         flags &= ~FLAG_CONTENT_DIR;
1075                 }
1076         } else
1077                 flags &= ~FLAG_CONTENT_DIR;
1078
1079         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level)) {
1080                 if (ignore_perishable)
1081                         non_perishable_cnt++;
1082                 return NULL;
1083         }
1084
1085         if (lp_ignore_nonreadable(module_id)) {
1086 #ifdef SUPPORT_LINKS
1087                 if (!S_ISLNK(st.st_mode))
1088 #endif
1089                         if (access(thisname, R_OK) != 0)
1090                                 return NULL;
1091         }
1092
1093   skip_filters:
1094
1095         /* Only divert a directory in the main transfer. */
1096         if (flist) {
1097                 if (flist->prev && S_ISDIR(st.st_mode)
1098                  && flags & FLAG_DIVERT_DIRS) {
1099                         /* Room for parent/sibling/next-child info. */
1100                         extra_len += DIRNODE_EXTRA_CNT * EXTRA_LEN;
1101                         if (relative_paths)
1102                                 extra_len += PTR_EXTRA_CNT * EXTRA_LEN;
1103                         dir_count++;
1104                         pool = dir_flist->file_pool;
1105                 } else
1106                         pool = flist->file_pool;
1107         } else
1108                 pool = NULL;
1109
1110         if (verbose > 2) {
1111                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
1112                         who_am_i(), thisname, filter_level);
1113         }
1114
1115         if ((basename = strrchr(thisname, '/')) != NULL) {
1116                 int len = basename++ - thisname;
1117                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
1118                         lastdir = new_array(char, len + 1);
1119                         memcpy(lastdir, thisname, len);
1120                         lastdir[len] = '\0';
1121                         lastdir_len = len;
1122                 }
1123         } else
1124                 basename = thisname;
1125         basename_len = strlen(basename) + 1; /* count the '\0' */
1126
1127 #ifdef SUPPORT_LINKS
1128         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
1129 #else
1130         linkname_len = 0;
1131 #endif
1132
1133         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
1134                 extra_len += EXTRA_LEN;
1135
1136 #if EXTRA_ROUNDING > 0
1137         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
1138                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
1139 #endif
1140
1141         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
1142                   + linkname_len;
1143         if (pool)
1144                 bp = pool_alloc(pool, alloc_len, "make_file");
1145         else {
1146                 if (!(bp = new_array(char, alloc_len)))
1147                         out_of_memory("make_file");
1148         }
1149
1150         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
1151         bp += extra_len;
1152         file = (struct file_struct *)bp;
1153         bp += FILE_STRUCT_LEN;
1154
1155         memcpy(bp, basename, basename_len);
1156         bp += basename_len + linkname_len; /* skip space for symlink too */
1157
1158 #ifdef SUPPORT_HARD_LINKS
1159         if (preserve_hard_links && flist && flist->prev) {
1160                 if (protocol_version >= 28
1161                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
1162                  : S_ISREG(st.st_mode)) {
1163                         tmp_dev = st.st_dev;
1164                         tmp_ino = st.st_ino;
1165                 } else
1166                         tmp_dev = 0;
1167         }
1168 #endif
1169
1170 #ifdef HAVE_STRUCT_STAT_ST_RDEV
1171         if (IS_DEVICE(st.st_mode) || IS_SPECIAL(st.st_mode)) {
1172                 tmp_rdev = st.st_rdev;
1173                 st.st_size = 0;
1174         }
1175 #endif
1176
1177         file->flags = flags;
1178         file->modtime = st.st_mtime;
1179         file->len32 = (uint32)st.st_size;
1180         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
1181                 file->flags |= FLAG_LENGTH64;
1182                 OPT_EXTRA(file, 0)->unum = (uint32)(st.st_size >> 32);
1183         }
1184         file->mode = st.st_mode;
1185         if (uid_ndx)
1186                 F_OWNER(file) = st.st_uid;
1187         if (gid_ndx)
1188                 F_GROUP(file) = st.st_gid;
1189
1190         if (basename != thisname)
1191                 file->dirname = lastdir;
1192
1193 #ifdef SUPPORT_LINKS
1194         if (linkname_len) {
1195                 bp = (char*)file->basename + basename_len;
1196                 memcpy(bp, linkname, linkname_len);
1197         }
1198 #endif
1199
1200         if (always_checksum && am_sender && S_ISREG(st.st_mode))
1201                 file_checksum(thisname, tmp_sum, st.st_size);
1202
1203         F_PATHNAME(file) = pathname;
1204
1205         /* This code is only used by the receiver when it is building
1206          * a list of files for a delete pass. */
1207         if (keep_dirlinks && linkname_len && flist) {
1208                 STRUCT_STAT st2;
1209                 int save_mode = file->mode;
1210                 file->mode = S_IFDIR; /* Find a directory with our name. */
1211                 if (flist_find(dir_flist, file) >= 0
1212                  && x_stat(thisname, &st2, NULL) == 0 && S_ISDIR(st2.st_mode)) {
1213                         file->modtime = st2.st_mtime;
1214                         file->len32 = 0;
1215                         file->mode = st2.st_mode;
1216                         if (uid_ndx)
1217                                 F_OWNER(file) = st2.st_uid;
1218                         if (gid_ndx)
1219                                 F_GROUP(file) = st2.st_gid;
1220                 } else
1221                         file->mode = save_mode;
1222         }
1223
1224         if (basename_len == 0+1)
1225                 return NULL;
1226
1227         if (unsort_ndx)
1228                 F_NDX(file) = dir_count - 1;
1229
1230         return file;
1231 }
1232
1233 /* Only called for temporary file_struct entries created by make_file(). */
1234 void unmake_file(struct file_struct *file)
1235 {
1236         int extra_cnt = file_extra_cnt + LEN64_BUMP(file);
1237 #if EXTRA_ROUNDING > 0
1238         if (extra_cnt & EXTRA_ROUNDING)
1239                 extra_cnt = (extra_cnt | EXTRA_ROUNDING) + 1;
1240 #endif
1241         free(REQ_EXTRA(file, extra_cnt));
1242 }
1243
1244 static struct file_struct *send_file_name(int f, struct file_list *flist,
1245                                           char *fname, STRUCT_STAT *stp,
1246                                           int flags, int filter_level)
1247 {
1248         struct file_struct *file;
1249 #if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
1250         stat_x sx;
1251 #endif
1252
1253         file = make_file(fname, flist, stp, flags, filter_level);
1254         if (!file)
1255                 return NULL;
1256
1257         if (chmod_modes && !S_ISLNK(file->mode))
1258                 file->mode = tweak_mode(file->mode, chmod_modes);
1259
1260 #ifdef SUPPORT_ACLS
1261         if (preserve_acls && !S_ISLNK(file->mode) && f >= 0) {
1262                 sx.st.st_mode = file->mode;
1263                 sx.acc_acl = sx.def_acl = NULL;
1264                 if (get_acl(fname, &sx) < 0)
1265                         return NULL;
1266         }
1267 #endif
1268 #ifdef SUPPORT_XATTRS
1269         if (preserve_xattrs && f >= 0) {
1270                 sx.xattr = NULL;
1271                 if (get_xattr(fname, &sx) < 0)
1272                         return NULL;
1273         }
1274 #endif
1275
1276         maybe_emit_filelist_progress(flist->used + flist_count_offset);
1277
1278         flist_expand(flist, 1);
1279         flist->files[flist->used++] = file;
1280         if (f >= 0) {
1281                 send_file_entry(f, file, flist->used - 1, flist->ndx_start);
1282 #ifdef SUPPORT_ACLS
1283                 if (preserve_acls && !S_ISLNK(file->mode)) {
1284                         send_acl(&sx, f);
1285                         free_acl(&sx);
1286                 }
1287 #endif
1288 #ifdef SUPPORT_XATTRS
1289                 if (preserve_xattrs) {
1290                         F_XATTR(file) = send_xattr(&sx, f);
1291                         free_xattr(&sx);
1292                 }
1293 #endif
1294         }
1295         return file;
1296 }
1297
1298 static void send_if_directory(int f, struct file_list *flist,
1299                               struct file_struct *file,
1300                               char *fbuf, unsigned int ol,
1301                               int flags)
1302 {
1303         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1304
1305         if (S_ISDIR(file->mode)
1306             && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) {
1307                 void *save_filters;
1308                 unsigned int len = strlen(fbuf);
1309                 if (len > 1 && fbuf[len-1] == '/')
1310                         fbuf[--len] = '\0';
1311                 if (len >= MAXPATHLEN - 1) {
1312                         io_error |= IOERR_GENERAL;
1313                         rprintf(FERROR, "skipping long-named directory: %s\n",
1314                                 full_fname(fbuf));
1315                         return;
1316                 }
1317                 save_filters = push_local_filters(fbuf, len);
1318                 send_directory(f, flist, fbuf, len, flags);
1319                 pop_local_filters(save_filters);
1320                 fbuf[ol] = '\0';
1321                 if (is_dot_dir)
1322                         fbuf[ol-1] = '.';
1323         }
1324 }
1325
1326 static int file_compare(const void *file1, const void *file2)
1327 {
1328         return f_name_cmp(*(struct file_struct **)file1,
1329                           *(struct file_struct **)file2);
1330 }
1331
1332 /* The guts of a merge-sort algorithm.  This was derived from the glibc
1333  * version, but I (Wayne) changed the merge code to do less copying and
1334  * to require only half the amount of temporary memory. */
1335 static void fsort_tmp(struct file_struct **fp, size_t num,
1336                       struct file_struct **tmp)
1337 {
1338         struct file_struct **f1, **f2, **t;
1339         size_t n1, n2;
1340
1341         n1 = num / 2;
1342         n2 = num - n1;
1343         f1 = fp;
1344         f2 = fp + n1;
1345
1346         if (n1 > 1)
1347                 fsort_tmp(f1, n1, tmp);
1348         if (n2 > 1)
1349                 fsort_tmp(f2, n2, tmp);
1350
1351         while (f_name_cmp(*f1, *f2) <= 0) {
1352                 if (!--n1)
1353                         return;
1354                 f1++;
1355         }
1356
1357         t = tmp;
1358         memcpy(t, f1, n1 * PTR_SIZE);
1359
1360         *f1++ = *f2++, n2--;
1361
1362         while (n1 > 0 && n2 > 0) {
1363                 if (f_name_cmp(*t, *f2) <= 0)
1364                         *f1++ = *t++, n1--;
1365                 else
1366                         *f1++ = *f2++, n2--;
1367         }
1368
1369         if (n1 > 0)
1370                 memcpy(f1, t, n1 * PTR_SIZE);
1371 }
1372
1373 /* This file-struct sorting routine makes sure that any identical names in
1374  * the file list stay in the same order as they were in the original list.
1375  * This is particularly vital in inc_recurse mode where we expect a sort
1376  * on the flist to match the exact order of a sort on the dir_flist. */
1377 static void fsort(struct file_struct **fp, size_t num)
1378 {
1379         if (num <= 1)
1380                 return;
1381
1382         if (use_qsort)
1383                 qsort(fp, num, PTR_SIZE, file_compare);
1384         else {
1385                 struct file_struct **tmp = new_array(struct file_struct *,
1386                                                      (num+1) / 2);
1387                 fsort_tmp(fp, num, tmp);
1388                 free(tmp);
1389         }
1390 }
1391
1392 /* We take an entire set of sibling dirs from the sorted flist and link them
1393  * into the tree, setting the appropriate parent/child/sibling pointers. */
1394 static void add_dirs_to_tree(int parent_ndx, struct file_list *from_flist,
1395                              int dir_cnt)
1396 {
1397         int i;
1398         int32 *dp = NULL;
1399         int32 *parent_dp = parent_ndx < 0 ? NULL
1400                          : F_DIR_NODE_P(dir_flist->sorted[parent_ndx]);
1401
1402         flist_expand(dir_flist, dir_cnt);
1403         dir_flist->sorted = dir_flist->files;
1404
1405         for (i = 0; dir_cnt; i++) {
1406                 struct file_struct *file = from_flist->sorted[i];
1407
1408                 if (!S_ISDIR(file->mode))
1409                         continue;
1410
1411                 dir_flist->files[dir_flist->used++] = file;
1412                 dir_cnt--;
1413
1414                 if (file->basename[0] == '.' && file->basename[1] == '\0')
1415                         continue;
1416
1417                 if (dp)
1418                         DIR_NEXT_SIBLING(dp) = dir_flist->used - 1;
1419                 else if (parent_dp)
1420                         DIR_FIRST_CHILD(parent_dp) = dir_flist->used - 1;
1421                 else
1422                         send_dir_ndx = dir_flist->used - 1;
1423
1424                 dp = F_DIR_NODE_P(file);
1425                 DIR_PARENT(dp) = parent_ndx;
1426                 DIR_FIRST_CHILD(dp) = -1;
1427         }
1428         if (dp)
1429                 DIR_NEXT_SIBLING(dp) = -1;
1430 }
1431
1432 /* This function is normally called by the sender, but the receiving side also
1433  * calls it from get_dirlist() with f set to -1 so that we just construct the
1434  * file list in memory without sending it over the wire.  Also, get_dirlist()
1435  * might call this with f set to -2, which also indicates that local filter
1436  * rules should be ignored. */
1437 static void send_directory(int f, struct file_list *flist, char *fbuf, int len,
1438                            int flags)
1439 {
1440         struct dirent *di;
1441         unsigned remainder;
1442         char *p;
1443         DIR *d;
1444         int divert_dirs = (flags & FLAG_DIVERT_DIRS) != 0;
1445         int start = flist->used;
1446         int filter_level = f == -2 ? SERVER_FILTERS : ALL_FILTERS;
1447
1448         assert(flist != NULL);
1449
1450         if (!(d = opendir(fbuf))) {
1451                 io_error |= IOERR_GENERAL;
1452                 rsyserr(FERROR, errno, "opendir %s failed", full_fname(fbuf));
1453                 return;
1454         }
1455
1456         p = fbuf + len;
1457         if (len != 1 || *fbuf != '/')
1458                 *p++ = '/';
1459         *p = '\0';
1460         remainder = MAXPATHLEN - (p - fbuf);
1461
1462         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1463                 char *dname = d_name(di);
1464                 if (dname[0] == '.' && (dname[1] == '\0'
1465                     || (dname[1] == '.' && dname[2] == '\0')))
1466                         continue;
1467                 if (strlcpy(p, dname, remainder) >= remainder) {
1468                         io_error |= IOERR_GENERAL;
1469                         rprintf(FINFO,
1470                                 "cannot send long-named file %s\n",
1471                                 full_fname(fbuf));
1472                         continue;
1473                 }
1474                 if (dname[0] == '\0') {
1475                         io_error |= IOERR_GENERAL;
1476                         rprintf(FINFO,
1477                                 "cannot send file with empty name in %s\n",
1478                                 full_fname(fbuf));
1479                         continue;
1480                 }
1481
1482                 send_file_name(f, flist, fbuf, NULL, flags, filter_level);
1483         }
1484
1485         fbuf[len] = '\0';
1486
1487         if (errno) {
1488                 io_error |= IOERR_GENERAL;
1489                 rsyserr(FERROR, errno, "readdir(%s)", full_fname(fbuf));
1490         }
1491
1492         closedir(d);
1493
1494         if (f >= 0 && recurse && !divert_dirs) {
1495                 int i, end = flist->used - 1;
1496                 /* send_if_directory() bumps flist->used, so use "end". */
1497                 for (i = start; i <= end; i++)
1498                         send_if_directory(f, flist, flist->files[i], fbuf, len, flags);
1499         }
1500 }
1501
1502 static char lastpath[MAXPATHLEN] = "";
1503 static int lastpath_len = 0;
1504 static struct file_struct *lastpath_struct;
1505
1506 static void send_implied_dirs(int f, struct file_list *flist, char *fname,
1507                               char *start, char *limit, int flags, char name_type)
1508 {
1509         struct file_struct *file;
1510         item_list *relname_list;
1511         relnamecache **rnpp;
1512         char *slash;
1513         int len, need_new_dir;
1514
1515         flags = (flags | FLAG_IMPLIED_DIR) & ~(FLAG_TOP_DIR | FLAG_CONTENT_DIR);
1516
1517         if (inc_recurse) {
1518                 if (lastpath_struct && F_PATHNAME(lastpath_struct) == pathname
1519                  && lastpath_len == limit - fname
1520                  && strncmp(lastpath, fname, lastpath_len) == 0)
1521                         need_new_dir = 0;
1522                 else
1523                         need_new_dir = 1;
1524         } else
1525                 need_new_dir = 1;
1526
1527         if (need_new_dir) {
1528                 int save_copy_links = copy_links;
1529                 int save_xfer_dirs = xfer_dirs;
1530
1531                 copy_links = xfer_dirs = 1;
1532
1533                 *limit = '\0';
1534
1535                 for (slash = start; (slash = strchr(slash+1, '/')) != NULL; ) {
1536                         *slash = '\0';
1537                         send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1538                         *slash = '/';
1539                 }
1540
1541                 file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1542                 if (inc_recurse) {
1543                         if (file && !S_ISDIR(file->mode))
1544                                 file = NULL;
1545                         lastpath_struct = file;
1546                 }
1547
1548                 strlcpy(lastpath, fname, sizeof lastpath);
1549                 lastpath_len = limit - fname;
1550
1551                 *limit = '/';
1552
1553                 copy_links = save_copy_links;
1554                 xfer_dirs = save_xfer_dirs;
1555
1556                 if (!inc_recurse)
1557                         return;
1558         }
1559
1560         if (!lastpath_struct)
1561                 return; /* dir must have vanished */
1562
1563         len = strlen(limit+1);
1564         memcpy(&relname_list, F_DIR_RELNAMES_P(lastpath_struct), sizeof relname_list);
1565         if (!relname_list) {
1566                 if (!(relname_list = new0(item_list)))
1567                         out_of_memory("send_implied_dirs");
1568                 memcpy(F_DIR_RELNAMES_P(lastpath_struct), &relname_list, sizeof relname_list);
1569         }
1570         rnpp = EXPAND_ITEM_LIST(relname_list, relnamecache *, 32);
1571         if (!(*rnpp = (relnamecache*)new_array(char, sizeof (relnamecache) + len)))
1572                 out_of_memory("send_implied_dirs");
1573         (*rnpp)->name_type = name_type;
1574         strlcpy((*rnpp)->fname, limit+1, len + 1);
1575 }
1576
1577 static void send1extra(int f, struct file_struct *file, struct file_list *flist)
1578 {
1579         char fbuf[MAXPATHLEN];
1580         item_list *relname_list;
1581         int len, dlen, flags = FLAG_DIVERT_DIRS | FLAG_CONTENT_DIR;
1582         size_t j;
1583
1584         f_name(file, fbuf);
1585         dlen = strlen(fbuf);
1586
1587         if (F_PATHNAME(file) != pathname) {
1588                 if (!push_pathname(F_PATHNAME(file), -1))
1589                         exit_cleanup(RERR_FILESELECT);
1590         }
1591
1592         change_local_filter_dir(fbuf, dlen, send_dir_depth);
1593
1594         if (file->flags & FLAG_CONTENT_DIR) {
1595                 if (one_file_system) {
1596                         STRUCT_STAT st;
1597                         if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1598                                 io_error |= IOERR_GENERAL;
1599                                 rsyserr(FERROR, errno, "link_stat %s failed",
1600                                         full_fname(fbuf));
1601                                 return;
1602                         }
1603                         filesystem_dev = st.st_dev;
1604                 }
1605                 send_directory(f, flist, fbuf, dlen, flags);
1606         }
1607
1608         if (!relative_paths)
1609                 return;
1610
1611         memcpy(&relname_list, F_DIR_RELNAMES_P(file), sizeof relname_list);
1612         if (!relname_list)
1613                 return;
1614
1615         for (j = 0; j < relname_list->count; j++) {
1616                 char *slash;
1617                 relnamecache *rnp = ((relnamecache**)relname_list->items)[j];
1618                 char name_type = rnp->name_type;
1619
1620                 fbuf[dlen] = '/';
1621                 len = strlcpy(fbuf + dlen + 1, rnp->fname, sizeof fbuf - dlen - 1);
1622                 free(rnp);
1623                 if (len >= (int)sizeof fbuf)
1624                         continue; /* Impossible... */
1625
1626                 slash = strchr(fbuf+dlen+1, '/');
1627                 if (slash) {
1628                         send_implied_dirs(f, flist, fbuf, fbuf+dlen+1, slash, flags, name_type);
1629                         continue;
1630                 }
1631
1632                 if (name_type != NORMAL_NAME) {
1633                         STRUCT_STAT st;
1634                         if (link_stat(fbuf, &st, 1) != 0) {
1635                                 io_error |= IOERR_GENERAL;
1636                                 rsyserr(FERROR, errno, "link_stat %s failed",
1637                                         full_fname(fbuf));
1638                                 continue;
1639                         }
1640                         send_file_name(f, flist, fbuf, &st, FLAG_TOP_DIR | flags, ALL_FILTERS);
1641                 } else
1642                         send_file_name(f, flist, fbuf, NULL, FLAG_TOP_DIR | flags, ALL_FILTERS);
1643         }
1644
1645         free(relname_list);
1646 }
1647
1648 void send_extra_file_list(int f, int at_least)
1649 {
1650         struct file_list *flist;
1651         int64 start_write;
1652         uint16 prev_flags;
1653         int old_cnt, save_io_error = io_error;
1654
1655         if (flist_eof)
1656                 return;
1657
1658         /* Keep sending data until we have the requested number of
1659          * files in the upcoming file-lists. */
1660         old_cnt = cur_flist->used;
1661         for (flist = first_flist; flist != cur_flist; flist = flist->next)
1662                 old_cnt += flist->used;
1663         while (file_total - old_cnt < at_least) {
1664                 struct file_struct *file = dir_flist->sorted[send_dir_ndx];
1665                 int dir_ndx, dstart = dir_count;
1666                 const char *pathname = F_PATHNAME(file);
1667                 int32 *dp;
1668
1669                 flist = flist_new(0, "send_extra_file_list");
1670                 start_write = stats.total_written;
1671
1672                 if (unsort_ndx)
1673                         dir_ndx = F_NDX(file);
1674                 else
1675                         dir_ndx = send_dir_ndx;
1676                 write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
1677                 flist->parent_ndx = dir_ndx;
1678
1679                 send1extra(f, file, flist);
1680                 prev_flags = file->flags;
1681                 dp = F_DIR_NODE_P(file);
1682
1683                 /* If there are any duplicate directory names that follow, we
1684                  * send all the dirs together in one file-list.  The dir_flist
1685                  * tree links all the child subdirs onto the last dup dir. */
1686                 while ((dir_ndx = DIR_NEXT_SIBLING(dp)) >= 0
1687                     && dir_flist->sorted[dir_ndx]->flags & FLAG_DUPLICATE) {
1688                         send_dir_ndx = dir_ndx;
1689                         file = dir_flist->sorted[dir_ndx];
1690                         /* Try to avoid some duplicate scanning of identical dirs. */
1691                         if (F_PATHNAME(file) == pathname && prev_flags & FLAG_CONTENT_DIR)
1692                                 file->flags &= ~FLAG_CONTENT_DIR;
1693                         send1extra(f, file, flist);
1694                         prev_flags = file->flags;
1695                         dp = F_DIR_NODE_P(file);
1696                 }
1697
1698                 write_byte(f, 0);
1699
1700                 if (need_unsorted_flist) {
1701                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
1702                                 out_of_memory("send_extra_file_list");
1703                         memcpy(flist->sorted, flist->files,
1704                                flist->used * sizeof (struct file_struct*));
1705                 } else
1706                         flist->sorted = flist->files;
1707
1708                 clean_flist(flist, 0);
1709
1710                 flist->ndx_end = flist->ndx_start + flist->used - 1;
1711                 if (!need_unsorted_flist)
1712                         flist->ndx_end -= (dir_count - dstart);
1713
1714                 add_dirs_to_tree(send_dir_ndx, flist, dir_count - dstart);
1715                 flist_done_allocating(flist);
1716
1717                 file_total += flist->used;
1718                 stats.flist_size += stats.total_written - start_write;
1719                 stats.num_files += flist->used;
1720                 if (verbose > 3)
1721                         output_flist(flist);
1722
1723                 if (DIR_FIRST_CHILD(dp) >= 0) {
1724                         send_dir_ndx = DIR_FIRST_CHILD(dp);
1725                         send_dir_depth++;
1726                 } else {
1727                         while (DIR_NEXT_SIBLING(dp) < 0) {
1728                                 if ((send_dir_ndx = DIR_PARENT(dp)) < 0) {
1729                                         write_ndx(f, NDX_FLIST_EOF);
1730                                         flist_eof = 1;
1731                                         change_local_filter_dir(NULL, 0, 0);
1732                                         goto finish;
1733                                 }
1734                                 send_dir_depth--;
1735                                 file = dir_flist->sorted[send_dir_ndx];
1736                                 dp = F_DIR_NODE_P(file);
1737                         }
1738                         send_dir_ndx = DIR_NEXT_SIBLING(dp);
1739                 }
1740         }
1741
1742   finish:
1743         if (io_error != save_io_error && !ignore_errors)
1744                 send_msg_int(MSG_IO_ERROR, io_error);
1745 }
1746
1747 struct file_list *send_file_list(int f, int argc, char *argv[])
1748 {
1749         static const char *lastdir;
1750         static int lastdir_len = -1;
1751         int len, dirlen;
1752         STRUCT_STAT st;
1753         char *p, *dir;
1754         struct file_list *flist;
1755         struct timeval start_tv, end_tv;
1756         int64 start_write;
1757         int use_ff_fd = 0;
1758         int disable_buffering;
1759         int flags = recurse ? FLAG_CONTENT_DIR : 0;
1760         int reading_remotely = filesfrom_host != NULL;
1761         int rl_flags = (reading_remotely ? 0 : RL_DUMP_COMMENTS)
1762 #ifdef ICONV_OPTION
1763                      | (filesfrom_convert ? RL_CONVERT : 0)
1764 #endif
1765                      | (eol_nulls || reading_remotely ? RL_EOL_NULLS : 0);
1766
1767         rprintf(FLOG, "building file list\n");
1768         if (show_filelist_p())
1769                 start_filelist_progress("building file list");
1770         else if (inc_recurse && verbose && !am_server)
1771                 rprintf(FCLIENT, "sending incremental file list\n");
1772
1773         start_write = stats.total_written;
1774         gettimeofday(&start_tv, NULL);
1775
1776         if (relative_paths && protocol_version >= 30)
1777                 implied_dirs = 1; /* We send flagged implied dirs */
1778
1779 #ifdef SUPPORT_HARD_LINKS
1780         if (preserve_hard_links && protocol_version >= 30 && !cur_flist)
1781                 init_hard_links();
1782 #endif
1783
1784         flist = cur_flist = flist_new(0, "send_file_list");
1785         if (inc_recurse) {
1786                 dir_flist = flist_new(FLIST_TEMP, "send_file_list");
1787                 flags |= FLAG_DIVERT_DIRS;
1788         } else
1789                 dir_flist = cur_flist;
1790
1791         disable_buffering = io_start_buffering_out(f);
1792         if (filesfrom_fd >= 0) {
1793                 if (argv[0] && !push_dir(argv[0], 0)) {
1794                         rsyserr(FERROR, errno, "push_dir %s failed in %s",
1795                                 full_fname(argv[0]), curr_dir);
1796                         exit_cleanup(RERR_FILESELECT);
1797                 }
1798                 use_ff_fd = 1;
1799         }
1800
1801         while (1) {
1802                 char fbuf[MAXPATHLEN], *fn, name_type;
1803
1804                 if (use_ff_fd) {
1805                         if (read_line(filesfrom_fd, fbuf, sizeof fbuf, rl_flags) == 0)
1806                                 break;
1807                         sanitize_path(fbuf, fbuf, "", 0, NULL);
1808                 } else {
1809                         if (argc-- == 0)
1810                                 break;
1811                         strlcpy(fbuf, *argv++, MAXPATHLEN);
1812                         if (sanitize_paths)
1813                                 sanitize_path(fbuf, fbuf, "", 0, NULL);
1814                 }
1815
1816                 len = strlen(fbuf);
1817                 if (relative_paths) {
1818                         /* We clean up fbuf below. */
1819                         name_type = NORMAL_NAME;
1820                 } else if (!len || fbuf[len - 1] == '/') {
1821                         if (len == 2 && fbuf[0] == '.') {
1822                                 /* Turn "./" into just "." rather than "./." */
1823                                 fbuf[1] = '\0';
1824                         } else {
1825                                 if (len + 1 >= MAXPATHLEN)
1826                                         overflow_exit("send_file_list");
1827                                 fbuf[len++] = '.';
1828                                 fbuf[len] = '\0';
1829                         }
1830                         name_type = DOT_NAME;
1831                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
1832                     && (len == 2 || fbuf[len-3] == '/')) {
1833                         if (len + 2 >= MAXPATHLEN)
1834                                 overflow_exit("send_file_list");
1835                         fbuf[len++] = '/';
1836                         fbuf[len++] = '.';
1837                         fbuf[len] = '\0';
1838                         name_type = DOT_NAME;
1839                 } else if (fbuf[len-1] == '.' && (len == 1 || fbuf[len-2] == '/'))
1840                         name_type = DOT_NAME;
1841                 else
1842                         name_type = NORMAL_NAME;
1843
1844                 dir = NULL;
1845
1846                 if (!relative_paths) {
1847                         p = strrchr(fbuf, '/');
1848                         if (p) {
1849                                 *p = '\0';
1850                                 if (p == fbuf)
1851                                         dir = "/";
1852                                 else
1853                                         dir = fbuf;
1854                                 len -= p - fbuf + 1;
1855                                 fn = p + 1;
1856                         } else
1857                                 fn = fbuf;
1858                 } else {
1859                         if ((p = strstr(fbuf, "/./")) != NULL) {
1860                                 *p = '\0';
1861                                 if (p == fbuf)
1862                                         dir = "/";
1863                                 else
1864                                         dir = fbuf;
1865                                 fn = p + 3;
1866                                 while (*fn == '/')
1867                                         fn++;
1868                                 if (!*fn)
1869                                         *--fn = '\0'; /* ensure room for '.' */
1870                         } else
1871                                 fn = fbuf;
1872                         len = clean_fname(fn, CFN_KEEP_LEADING_DOT_DIR
1873                                             | CFN_KEEP_TRAILING_SLASH
1874                                             | CFN_DROP_TRAILING_DOT_DIR);
1875                         if (len == 1) {
1876                                 if (fn[0] == '/') {
1877                                         fn = "/.";
1878                                         len = 2;
1879                                         name_type = DOT_NAME;
1880                                 } else if (fn[0] == '.')
1881                                         name_type = DOT_NAME;
1882                         } else if (fn[len-1] == '/') {
1883                                 fn[--len] = '\0';
1884                                 if (len == 1 && *fn == '.')
1885                                         name_type = DOT_NAME;
1886                                 else
1887                                         name_type = SLASH_ENDING_NAME;
1888                         }
1889                         /* Reject a ".." dir in the active part of the path. */
1890                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
1891                                 if ((p[2] == '/' || p[2] == '\0')
1892                                  && (p == fn || p[-1] == '/')) {
1893                                         rprintf(FERROR,
1894                                             "found \"..\" dir in relative path: %s\n",
1895                                             fn);
1896                                         exit_cleanup(RERR_SYNTAX);
1897                                 }
1898                         }
1899                 }
1900
1901                 if (!*fn) {
1902                         len = 1;
1903                         fn = ".";
1904                         name_type = DOT_NAME;
1905                 }
1906
1907                 dirlen = dir ? strlen(dir) : 0;
1908                 if (dirlen != lastdir_len || memcmp(lastdir, dir, dirlen) != 0) {
1909                         if (!push_pathname(dir ? strdup(dir) : NULL, dirlen))
1910                                 continue;
1911                         lastdir = pathname;
1912                         lastdir_len = pathname_len;
1913                 } else if (!push_pathname(lastdir, lastdir_len))
1914                         continue;
1915
1916                 if (fn != fbuf)
1917                         memmove(fbuf, fn, len + 1);
1918
1919                 if (link_stat(fbuf, &st, copy_dirlinks || name_type != NORMAL_NAME) != 0) {
1920                         io_error |= IOERR_GENERAL;
1921                         rsyserr(FERROR, errno, "link_stat %s failed",
1922                                 full_fname(fbuf));
1923                         continue;
1924                 }
1925
1926                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
1927                         rprintf(FINFO, "skipping directory %s\n", fbuf);
1928                         continue;
1929                 }
1930
1931                 if (inc_recurse && relative_paths && *fbuf) {
1932                         if ((p = strchr(fbuf+1, '/')) != NULL) {
1933                                 if (p - fbuf == 1 && *fbuf == '.') {
1934                                         if ((fn = strchr(p+1, '/')) != NULL)
1935                                                 p = fn;
1936                                 } else
1937                                         fn = p;
1938                                 send_implied_dirs(f, flist, fbuf, fbuf, p, flags, name_type);
1939                                 if (fn == p)
1940                                         continue;
1941                         }
1942                 } else if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
1943                         /* Send the implied directories at the start of the
1944                          * source spec, so we get their permissions right. */
1945                         char *lp = lastpath, *slash = fbuf;
1946                         *p = '\0';
1947                         /* Skip any initial directories in our path that we
1948                          * have in common with lastpath. */
1949                         for (fn = fbuf; *fn && *lp == *fn; lp++, fn++) {
1950                                 if (*fn == '/')
1951                                         slash = fn;
1952                         }
1953                         *p = '/';
1954                         if (fn != p || (*lp && *lp != '/'))
1955                                 send_implied_dirs(f, flist, fbuf, slash, p, flags, 0);
1956                 }
1957
1958                 if (one_file_system)
1959                         filesystem_dev = st.st_dev;
1960
1961                 if (recurse || (xfer_dirs && name_type != NORMAL_NAME)) {
1962                         struct file_struct *file;
1963                         int top_flags = FLAG_TOP_DIR | FLAG_CONTENT_DIR | flags;
1964                         file = send_file_name(f, flist, fbuf, &st,
1965                                               top_flags, ALL_FILTERS);
1966                         if (inc_recurse) {
1967                                 if (name_type == DOT_NAME) {
1968                                         if (send_dir_depth < 0) {
1969                                                 send_dir_depth = 0;
1970                                                 change_local_filter_dir(fbuf, len, send_dir_depth);
1971                                         }
1972                                         send_directory(f, flist, fbuf, len, flags);
1973                                 }
1974                         } else if (file)
1975                                 send_if_directory(f, flist, file, fbuf, len, flags);
1976                 } else
1977                         send_file_name(f, flist, fbuf, &st, flags, ALL_FILTERS);
1978         }
1979
1980         gettimeofday(&end_tv, NULL);
1981         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
1982                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
1983         if (stats.flist_buildtime == 0)
1984                 stats.flist_buildtime = 1;
1985         start_tv = end_tv;
1986
1987         write_byte(f, 0); /* Indicate end of file list */
1988
1989 #ifdef SUPPORT_HARD_LINKS
1990         if (preserve_hard_links && protocol_version >= 30 && !inc_recurse)
1991                 idev_destroy();
1992 #endif
1993
1994         if (show_filelist_p())
1995                 finish_filelist_progress(flist);
1996
1997         gettimeofday(&end_tv, NULL);
1998         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
1999                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2000
2001         /* When converting names, both sides keep an unsorted file-list array
2002          * because the names will differ on the sending and receiving sides
2003          * (both sides will use the unsorted index number for each item). */
2004
2005         /* Sort the list without removing any duplicates.  This allows the
2006          * receiving side to ask for whatever name it kept.  For incremental
2007          * recursion mode, the sender marks duplicate dirs so that it can
2008          * send them together in a single file-list. */
2009         if (need_unsorted_flist) {
2010                 if (inc_recurse) {
2011                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2012                                 out_of_memory("send_file_list");
2013                         memcpy(flist->sorted, flist->files,
2014                                flist->used * sizeof (struct file_struct*));
2015                         clean_flist(flist, 0);
2016                 } else {
2017                         flist->sorted = flist->files;
2018                         flist->low = 0;
2019                         flist->high = flist->used - 1;
2020                 }
2021         } else {
2022                 flist->sorted = flist->files;
2023                 clean_flist(flist, 0);
2024         }
2025         file_total += flist->used;
2026
2027         /* We don't subtract dir_count for the first send since we
2028          * might have one or more dot dirs which need to get sent. */
2029         flist->ndx_end = flist->ndx_start + flist->used - 1;
2030
2031         if (!numeric_ids && !inc_recurse)
2032                 send_id_list(f);
2033
2034         /* send the io_error flag */
2035         if (protocol_version < 30)
2036                 write_int(f, ignore_errors ? 0 : io_error);
2037         else if (io_error && !ignore_errors)
2038                 send_msg_int(MSG_IO_ERROR, io_error);
2039
2040         if (disable_buffering)
2041                 io_end_buffering_out();
2042
2043         stats.flist_size = stats.total_written - start_write;
2044         stats.num_files = flist->used;
2045
2046         if (verbose > 3)
2047                 output_flist(flist);
2048
2049         if (verbose > 2)
2050                 rprintf(FINFO, "send_file_list done\n");
2051
2052         if (inc_recurse) {
2053                 send_dir_depth = 1;
2054                 add_dirs_to_tree(-1, flist, dir_count);
2055                 if (!file_total || strcmp(flist->sorted[0]->basename, ".") != 0)
2056                         flist->parent_ndx = -1;
2057                 flist_done_allocating(flist);
2058                 if (send_dir_ndx < 0) {
2059                         write_ndx(f, NDX_FLIST_EOF);
2060                         flist_eof = 1;
2061                 }
2062                 else if (file_total == 1) {
2063                         /* If we're creating incremental file-lists and there
2064                          * was just 1 item in the first file-list, send 1 more
2065                          * file-list to check if this is a 1-file xfer. */
2066                         send_extra_file_list(f, 1);
2067                 }
2068         }
2069
2070         return flist;
2071 }
2072
2073 struct file_list *recv_file_list(int f)
2074 {
2075         struct file_list *flist;
2076         int dstart, flags;
2077         int64 start_read;
2078
2079         if (!first_flist)
2080                 rprintf(FLOG, "receiving file list\n");
2081         if (show_filelist_p())
2082                 start_filelist_progress("receiving file list");
2083         else if (inc_recurse && verbose && !am_server && !first_flist)
2084                 rprintf(FCLIENT, "receiving incremental file list\n");
2085
2086         start_read = stats.total_read;
2087
2088 #ifdef SUPPORT_HARD_LINKS
2089         if (preserve_hard_links && !first_flist)
2090                 init_hard_links();
2091 #endif
2092
2093         flist = flist_new(0, "recv_file_list");
2094
2095         if (inc_recurse) {
2096                 if (flist->ndx_start == 1)
2097                         dir_flist = flist_new(FLIST_TEMP, "recv_file_list");
2098                 dstart = dir_flist->used;
2099         } else {
2100                 dir_flist = flist;
2101                 dstart = 0;
2102         }
2103
2104         while ((flags = read_byte(f)) != 0) {
2105                 struct file_struct *file;
2106
2107                 flist_expand(flist, 1);
2108
2109                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
2110                         flags |= read_byte(f) << 8;
2111                 file = recv_file_entry(flist, flags, f);
2112
2113                 if (inc_recurse && S_ISDIR(file->mode)) {
2114                         flist_expand(dir_flist, 1);
2115                         dir_flist->files[dir_flist->used++] = file;
2116                 }
2117
2118                 flist->files[flist->used++] = file;
2119
2120                 maybe_emit_filelist_progress(flist->used);
2121
2122                 if (verbose > 2) {
2123                         rprintf(FINFO, "recv_file_name(%s)\n",
2124                                 f_name(file, NULL));
2125                 }
2126         }
2127         file_total += flist->used;
2128
2129         flist->ndx_end = flist->ndx_start + flist->used - 1;
2130         if (inc_recurse && !need_unsorted_flist && flist->ndx_start > 1)
2131                 flist->ndx_end -= dir_flist->used - dstart;
2132
2133         if (verbose > 2)
2134                 rprintf(FINFO, "received %d names\n", flist->used);
2135
2136         if (show_filelist_p())
2137                 finish_filelist_progress(flist);
2138
2139         if (need_unsorted_flist) {
2140                 /* Create an extra array of index pointers that we can sort for
2141                  * the generator's use (for wading through the files in sorted
2142                  * order and for calling flist_find()).  We keep the "files"
2143                  * list unsorted for our exchange of index numbers with the
2144                  * other side (since their names may not sort the same). */
2145                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2146                         out_of_memory("recv_file_list");
2147                 memcpy(flist->sorted, flist->files,
2148                        flist->used * sizeof (struct file_struct*));
2149                 if (inc_recurse && dir_flist->used > dstart) {
2150                         dir_flist->sorted = realloc_array(dir_flist->sorted,
2151                                                 struct file_struct *,
2152                                                 dir_flist->used);
2153                         memcpy(dir_flist->sorted + dstart, dir_flist->files + dstart,
2154                                (dir_flist->used - dstart) * sizeof (struct file_struct*));
2155                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2156                 }
2157         } else {
2158                 flist->sorted = flist->files;
2159                 if (inc_recurse && dir_flist->used > dstart) {
2160                         dir_flist->sorted = dir_flist->files;
2161                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2162                 }
2163         }
2164
2165         if (inc_recurse)
2166                 flist_done_allocating(flist);
2167         else if (f >= 0)
2168                 recv_id_list(f, flist);
2169
2170         clean_flist(flist, relative_paths);
2171
2172         if (protocol_version < 30) {
2173                 /* Recv the io_error flag */
2174                 if (ignore_errors)
2175                         read_int(f);
2176                 else
2177                         io_error |= read_int(f);
2178         } else if (inc_recurse && flist->ndx_start == 1) {
2179                 if (!file_total || strcmp(flist->sorted[0]->basename, ".") != 0)
2180                         flist->parent_ndx = -1;
2181         }
2182
2183         if (verbose > 3)
2184                 output_flist(flist);
2185
2186         if (verbose > 2)
2187                 rprintf(FINFO, "recv_file_list done\n");
2188
2189         stats.flist_size += stats.total_read - start_read;
2190         stats.num_files += flist->used;
2191
2192         return flist;
2193 }
2194
2195 /* This is only used once by the receiver if the very first file-list
2196  * has exactly one item in it. */
2197 void recv_additional_file_list(int f)
2198 {
2199         struct file_list *flist;
2200         int ndx = read_ndx(f);
2201         if (ndx == NDX_FLIST_EOF) {
2202                 flist_eof = 1;
2203                 change_local_filter_dir(NULL, 0, 0);
2204         } else {
2205                 ndx = NDX_FLIST_OFFSET - ndx;
2206                 if (ndx < 0 || ndx >= dir_flist->used) {
2207                         ndx = NDX_FLIST_OFFSET - ndx;
2208                         rprintf(FERROR,
2209                                 "[%s] Invalid dir index: %d (%d - %d)\n",
2210                                 who_am_i(), ndx, NDX_FLIST_OFFSET,
2211                                 NDX_FLIST_OFFSET - dir_flist->used + 1);
2212                         exit_cleanup(RERR_PROTOCOL);
2213                 }
2214                 if (verbose > 3) {
2215                         rprintf(FINFO, "[%s] receiving flist for dir %d\n",
2216                                 who_am_i(), ndx);
2217                 }
2218                 flist = recv_file_list(f);
2219                 flist->parent_ndx = ndx;
2220         }
2221 }
2222
2223 /* Search for an identically-named item in the file list.  Note that the
2224  * items must agree in their directory-ness, or no match is returned. */
2225 int flist_find(struct file_list *flist, struct file_struct *f)
2226 {
2227         int low = flist->low, high = flist->high;
2228         int diff, mid, mid_up;
2229
2230         while (low <= high) {
2231                 mid = (low + high) / 2;
2232                 if (F_IS_ACTIVE(flist->sorted[mid]))
2233                         mid_up = mid;
2234                 else {
2235                         /* Scan for the next non-empty entry using the cached
2236                          * distance values.  If the value isn't fully up-to-
2237                          * date, update it. */
2238                         mid_up = mid + F_DEPTH(flist->sorted[mid]);
2239                         if (!F_IS_ACTIVE(flist->sorted[mid_up])) {
2240                                 do {
2241                                     mid_up += F_DEPTH(flist->sorted[mid_up]);
2242                                 } while (!F_IS_ACTIVE(flist->sorted[mid_up]));
2243                                 F_DEPTH(flist->sorted[mid]) = mid_up - mid;
2244                         }
2245                         if (mid_up > high) {
2246                                 /* If there's nothing left above us, set high to
2247                                  * a non-empty entry below us and continue. */
2248                                 high = mid - (int)flist->sorted[mid]->len32;
2249                                 if (!F_IS_ACTIVE(flist->sorted[high])) {
2250                                         do {
2251                                             high -= (int)flist->sorted[high]->len32;
2252                                         } while (!F_IS_ACTIVE(flist->sorted[high]));
2253                                         flist->sorted[mid]->len32 = mid - high;
2254                                 }
2255                                 continue;
2256                         }
2257                 }
2258                 diff = f_name_cmp(flist->sorted[mid_up], f);
2259                 if (diff == 0) {
2260                         if (protocol_version < 29
2261                             && S_ISDIR(flist->sorted[mid_up]->mode)
2262                             != S_ISDIR(f->mode))
2263                                 return -1;
2264                         return mid_up;
2265                 }
2266                 if (diff < 0)
2267                         low = mid_up + 1;
2268                 else
2269                         high = mid - 1;
2270         }
2271         return -1;
2272 }
2273
2274 /*
2275  * Free up any resources a file_struct has allocated
2276  * and clear the file.
2277  */
2278 void clear_file(struct file_struct *file)
2279 {
2280         /* The +1 zeros out the first char of the basename. */
2281         memset(file, 0, FILE_STRUCT_LEN + 1);
2282         /* In an empty entry, F_DEPTH() is an offset to the next non-empty
2283          * entry.  Likewise for len32 in the opposite direction.  We assume
2284          * that we're alone for now since flist_find() will adjust the counts
2285          * it runs into that aren't up-to-date. */
2286         file->len32 = F_DEPTH(file) = 1;
2287 }
2288
2289 /* Allocate a new file list. */
2290 struct file_list *flist_new(int flags, char *msg)
2291 {
2292         struct file_list *flist;
2293
2294         if (!(flist = new0(struct file_list)))
2295                 out_of_memory(msg);
2296
2297         if (flags & FLIST_TEMP) {
2298                 if (!(flist->file_pool = pool_create(SMALL_EXTENT, 0,
2299                                                 out_of_memory, POOL_INTERN)))
2300                         out_of_memory(msg);
2301         } else {
2302                 /* This is a doubly linked list with prev looping back to
2303                  * the end of the list, but the last next pointer is NULL. */
2304                 if (!first_flist) {
2305                         flist->file_pool = pool_create(NORMAL_EXTENT, 0,
2306                                                 out_of_memory, POOL_INTERN);
2307                         if (!flist->file_pool)
2308                                 out_of_memory(msg);
2309
2310                         flist->ndx_start = inc_recurse ? 1 : 0;
2311
2312                         first_flist = cur_flist = flist->prev = flist;
2313                 } else {
2314                         flist->file_pool = first_flist->file_pool;
2315
2316                         flist->ndx_start = first_flist->prev->ndx_end + 2;
2317                         if (flist->ndx_start <= high_hlink_ndx)
2318                                 flist->ndx_start = high_hlink_ndx + 1;
2319
2320                         flist->prev = first_flist->prev;
2321                         flist->prev->next = first_flist->prev = flist;
2322                 }
2323                 flist->pool_boundary = pool_boundary(flist->file_pool, 0);
2324                 flist_cnt++;
2325         }
2326
2327         return flist;
2328 }
2329
2330 /* Free up all elements in a flist. */
2331 void flist_free(struct file_list *flist)
2332 {
2333         if (!flist->prev) {
2334                 /* Was FLIST_TEMP dir-list. */
2335         } else if (flist == flist->prev) {
2336                 first_flist = cur_flist = NULL;
2337                 file_total = 0;
2338                 flist_cnt = 0;
2339         } else {
2340                 if (flist == cur_flist)
2341                         cur_flist = flist->next;
2342                 if (flist == first_flist)
2343                         first_flist = first_flist->next;
2344                 else {
2345                         flist->prev->next = flist->next;
2346                         if (!flist->next)
2347                                 flist->next = first_flist;
2348                 }
2349                 flist->next->prev = flist->prev;
2350                 file_total -= flist->used;
2351                 flist_cnt--;
2352         }
2353
2354         if (!flist->prev || !flist_cnt)
2355                 pool_destroy(flist->file_pool);
2356         else
2357                 pool_free_old(flist->file_pool, flist->pool_boundary);
2358
2359         if (flist->sorted && flist->sorted != flist->files)
2360                 free(flist->sorted);
2361         free(flist->files);
2362         free(flist);
2363 }
2364
2365 /* This routine ensures we don't have any duplicate names in our file list.
2366  * duplicate names can cause corruption because of the pipelining. */
2367 static void clean_flist(struct file_list *flist, int strip_root)
2368 {
2369         char fbuf[MAXPATHLEN];
2370         int i, prev_i;
2371
2372         if (!flist)
2373                 return;
2374         if (flist->used == 0) {
2375                 flist->high = -1;
2376                 flist->low = 0;
2377                 return;
2378         }
2379
2380         fsort(flist->sorted, flist->used);
2381
2382         if (!am_sender || inc_recurse) {
2383                 for (i = prev_i = 0; i < flist->used; i++) {
2384                         if (F_IS_ACTIVE(flist->sorted[i])) {
2385                                 prev_i = i;
2386                                 break;
2387                         }
2388                 }
2389                 flist->low = prev_i;
2390         } else {
2391                 i = prev_i = flist->used - 1;
2392                 flist->low = 0;
2393         }
2394
2395         while (++i < flist->used) {
2396                 int j;
2397                 struct file_struct *file = flist->sorted[i];
2398
2399                 if (!F_IS_ACTIVE(file))
2400                         continue;
2401                 if (f_name_cmp(file, flist->sorted[prev_i]) == 0)
2402                         j = prev_i;
2403                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
2404                         int save_mode = file->mode;
2405                         /* Make sure that this directory doesn't duplicate a
2406                          * non-directory earlier in the list. */
2407                         flist->high = prev_i;
2408                         file->mode = S_IFREG;
2409                         j = flist_find(flist, file);
2410                         file->mode = save_mode;
2411                 } else
2412                         j = -1;
2413                 if (j >= 0) {
2414                         int keep, drop;
2415                         /* If one is a dir and the other is not, we want to
2416                          * keep the dir because it might have contents in the
2417                          * list.  Otherwise keep the first one. */
2418                         if (S_ISDIR(file->mode)) {
2419                                 struct file_struct *fp = flist->sorted[j];
2420                                 if (!S_ISDIR(fp->mode))
2421                                         keep = i, drop = j;
2422                                 else {
2423                                         if (am_sender)
2424                                                 file->flags |= FLAG_DUPLICATE;
2425                                         else { /* Make sure we merge our vital flags. */
2426                                                 fp->flags |= file->flags & (FLAG_TOP_DIR|FLAG_CONTENT_DIR);
2427                                                 fp->flags &= file->flags | ~FLAG_IMPLIED_DIR;
2428                                         }
2429                                         keep = j, drop = i;
2430                                 }
2431                         } else
2432                                 keep = j, drop = i;
2433
2434                         if (!am_sender) {
2435                                 if (verbose > 1) {
2436                                         rprintf(FINFO,
2437                                             "removing duplicate name %s from file list (%d)\n",
2438                                             f_name(file, fbuf), drop + flist->ndx_start);
2439                                 }
2440                                 clear_file(flist->sorted[drop]);
2441                         }
2442
2443                         if (keep == i) {
2444                                 if (flist->low == drop) {
2445                                         for (j = drop + 1;
2446                                              j < i && !F_IS_ACTIVE(flist->sorted[j]);
2447                                              j++) {}
2448                                         flist->low = j;
2449                                 }
2450                                 prev_i = i;
2451                         }
2452                 } else
2453                         prev_i = i;
2454         }
2455         flist->high = prev_i;
2456
2457         if (strip_root) {
2458                 /* We need to strip off the leading slashes for relative
2459                  * paths, but this must be done _after_ the sorting phase. */
2460                 for (i = flist->low; i <= flist->high; i++) {
2461                         struct file_struct *file = flist->sorted[i];
2462
2463                         if (!file->dirname)
2464                                 continue;
2465                         while (*file->dirname == '/')
2466                                 file->dirname++;
2467                         if (!*file->dirname)
2468                                 file->dirname = NULL;
2469                 }
2470         }
2471
2472         if (prune_empty_dirs && !am_sender) {
2473                 int j, prev_depth = 0;
2474
2475                 prev_i = 0; /* It's OK that this isn't really true. */
2476
2477                 for (i = flist->low; i <= flist->high; i++) {
2478                         struct file_struct *fp, *file = flist->sorted[i];
2479
2480                         /* This temporarily abuses the F_DEPTH() value for a
2481                          * directory that is in a chain that might get pruned.
2482                          * We restore the old value if it gets a reprieve. */
2483                         if (S_ISDIR(file->mode) && F_DEPTH(file)) {
2484                                 /* Dump empty dirs when coming back down. */
2485                                 for (j = prev_depth; j >= F_DEPTH(file); j--) {
2486                                         fp = flist->sorted[prev_i];
2487                                         if (F_DEPTH(fp) >= 0)
2488                                                 break;
2489                                         prev_i = -F_DEPTH(fp)-1;
2490                                         clear_file(fp);
2491                                 }
2492                                 prev_depth = F_DEPTH(file);
2493                                 if (is_excluded(f_name(file, fbuf), 1,
2494                                                        ALL_FILTERS)) {
2495                                         /* Keep dirs through this dir. */
2496                                         for (j = prev_depth-1; ; j--) {
2497                                                 fp = flist->sorted[prev_i];
2498                                                 if (F_DEPTH(fp) >= 0)
2499                                                         break;
2500                                                 prev_i = -F_DEPTH(fp)-1;
2501                                                 F_DEPTH(fp) = j;
2502                                         }
2503                                 } else
2504                                         F_DEPTH(file) = -prev_i-1;
2505                                 prev_i = i;
2506                         } else {
2507                                 /* Keep dirs through this non-dir. */
2508                                 for (j = prev_depth; ; j--) {
2509                                         fp = flist->sorted[prev_i];
2510                                         if (F_DEPTH(fp) >= 0)
2511                                                 break;
2512                                         prev_i = -F_DEPTH(fp)-1;
2513                                         F_DEPTH(fp) = j;
2514                                 }
2515                         }
2516                 }
2517                 /* Dump all remaining empty dirs. */
2518                 while (1) {
2519                         struct file_struct *fp = flist->sorted[prev_i];
2520                         if (F_DEPTH(fp) >= 0)
2521                                 break;
2522                         prev_i = -F_DEPTH(fp)-1;
2523                         clear_file(fp);
2524                 }
2525
2526                 for (i = flist->low; i <= flist->high; i++) {
2527                         if (F_IS_ACTIVE(flist->sorted[i]))
2528                                 break;
2529                 }
2530                 flist->low = i;
2531                 for (i = flist->high; i >= flist->low; i--) {
2532                         if (F_IS_ACTIVE(flist->sorted[i]))
2533                                 break;
2534                 }
2535                 flist->high = i;
2536         }
2537 }
2538
2539 static void output_flist(struct file_list *flist)
2540 {
2541         char uidbuf[16], gidbuf[16], depthbuf[16];
2542         struct file_struct *file;
2543         const char *root, *dir, *slash, *name, *trail;
2544         const char *who = who_am_i();
2545         int i;
2546
2547         rprintf(FINFO, "[%s] flist start=%d, end=%d, used=%d, low=%d, high=%d\n",
2548                 who, flist->ndx_start, flist->ndx_end, flist->used, flist->low, flist->high);
2549         for (i = 0; i < flist->used; i++) {
2550                 file = flist->files[i];
2551                 if ((am_root || am_sender) && uid_ndx) {
2552                         snprintf(uidbuf, sizeof uidbuf, " uid=%u",
2553                                  F_OWNER(file));
2554                 } else
2555                         *uidbuf = '\0';
2556                 if (gid_ndx) {
2557                         static char parens[] = "(\0)\0\0\0";
2558                         char *pp = parens + (file->flags & FLAG_SKIP_GROUP ? 0 : 3);
2559                         snprintf(gidbuf, sizeof gidbuf, " gid=%s%u%s",
2560                                  pp, F_GROUP(file), pp + 2);
2561                 } else
2562                         *gidbuf = '\0';
2563                 if (!am_sender)
2564                         snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file));
2565                 if (F_IS_ACTIVE(file)) {
2566                         root = am_sender ? NS(F_PATHNAME(file)) : depthbuf;
2567                         if ((dir = file->dirname) == NULL)
2568                                 dir = slash = "";
2569                         else
2570                                 slash = "/";
2571                         name = file->basename;
2572                         trail = S_ISDIR(file->mode) ? "/" : "";
2573                 } else
2574                         root = dir = slash = name = trail = "";
2575                 rprintf(FINFO,
2576                         "[%s] i=%d %s %s%s%s%s mode=0%o len=%.0f%s%s flags=%x\n",
2577                         who, i + flist->ndx_start,
2578                         root, dir, slash, name, trail,
2579                         (int)file->mode, (double)F_LENGTH(file),
2580                         uidbuf, gidbuf, file->flags);
2581         }
2582 }
2583
2584 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
2585 enum fnc_type { t_PATH, t_ITEM };
2586
2587 static int found_prefix;
2588
2589 /* Compare the names of two file_struct entities, similar to how strcmp()
2590  * would do if it were operating on the joined strings.
2591  *
2592  * Some differences beginning with protocol_version 29: (1) directory names
2593  * are compared with an assumed trailing slash so that they compare in a
2594  * way that would cause them to sort immediately prior to any content they
2595  * may have; (2) a directory of any name compares after a non-directory of
2596  * any name at the same depth; (3) a directory with name "." compares prior
2597  * to anything else.  These changes mean that a directory and a non-dir
2598  * with the same name will not compare as equal (protocol_version >= 29).
2599  *
2600  * The dirname component can be an empty string, but the basename component
2601  * cannot (and never is in the current codebase).  The basename component
2602  * may be NULL (for a removed item), in which case it is considered to be
2603  * after any existing item. */
2604 int f_name_cmp(const struct file_struct *f1, const struct file_struct *f2)
2605 {
2606         int dif;
2607         const uchar *c1, *c2;
2608         enum fnc_state state1, state2;
2609         enum fnc_type type1, type2;
2610         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
2611
2612         if (!f1 || !F_IS_ACTIVE(f1)) {
2613                 if (!f2 || !F_IS_ACTIVE(f2))
2614                         return 0;
2615                 return -1;
2616         }
2617         if (!f2 || !F_IS_ACTIVE(f2))
2618                 return 1;
2619
2620         c1 = (uchar*)f1->dirname;
2621         c2 = (uchar*)f2->dirname;
2622         if (c1 == c2)
2623                 c1 = c2 = NULL;
2624         if (!c1) {
2625                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2626                 c1 = (const uchar*)f1->basename;
2627                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2628                         type1 = t_ITEM;
2629                         state1 = s_TRAILING;
2630                         c1 = (uchar*)"";
2631                 } else
2632                         state1 = s_BASE;
2633         } else {
2634                 type1 = t_path;
2635                 state1 = s_DIR;
2636         }
2637         if (!c2) {
2638                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2639                 c2 = (const uchar*)f2->basename;
2640                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2641                         type2 = t_ITEM;
2642                         state2 = s_TRAILING;
2643                         c2 = (uchar*)"";
2644                 } else
2645                         state2 = s_BASE;
2646         } else {
2647                 type2 = t_path;
2648                 state2 = s_DIR;
2649         }
2650
2651         if (type1 != type2)
2652                 return type1 == t_PATH ? 1 : -1;
2653
2654         do {
2655                 if (!*c1) {
2656                         switch (state1) {
2657                         case s_DIR:
2658                                 state1 = s_SLASH;
2659                                 c1 = (uchar*)"/";
2660                                 break;
2661                         case s_SLASH:
2662                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2663                                 c1 = (const uchar*)f1->basename;
2664                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2665                                         type1 = t_ITEM;
2666                                         state1 = s_TRAILING;
2667                                         c1 = (uchar*)"";
2668                                 } else
2669                                         state1 = s_BASE;
2670                                 break;
2671                         case s_BASE:
2672                                 state1 = s_TRAILING;
2673                                 if (type1 == t_PATH) {
2674                                         c1 = (uchar*)"/";
2675                                         break;
2676                                 }
2677                                 /* FALL THROUGH */
2678                         case s_TRAILING:
2679                                 type1 = t_ITEM;
2680                                 break;
2681                         }
2682                         if (*c2 && type1 != type2)
2683                                 return type1 == t_PATH ? 1 : -1;
2684                 }
2685                 if (!*c2) {
2686                         switch (state2) {
2687                         case s_DIR:
2688                                 state2 = s_SLASH;
2689                                 c2 = (uchar*)"/";
2690                                 break;
2691                         case s_SLASH:
2692                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2693                                 c2 = (const uchar*)f2->basename;
2694                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2695                                         type2 = t_ITEM;
2696                                         state2 = s_TRAILING;
2697                                         c2 = (uchar*)"";
2698                                 } else
2699                                         state2 = s_BASE;
2700                                 break;
2701                         case s_BASE:
2702                                 state2 = s_TRAILING;
2703                                 if (type2 == t_PATH) {
2704                                         c2 = (uchar*)"/";
2705                                         break;
2706                                 }
2707                                 /* FALL THROUGH */
2708                         case s_TRAILING:
2709                                 found_prefix = 1;
2710                                 if (!*c1)
2711                                         return 0;
2712                                 type2 = t_ITEM;
2713                                 break;
2714                         }
2715                         if (type1 != type2)
2716                                 return type1 == t_PATH ? 1 : -1;
2717                 }
2718         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
2719
2720         return dif;
2721 }
2722
2723 /* Returns 1 if f1's filename has all of f2's filename as a prefix.  This does
2724  * not match if f2's basename is not an exact match of a path element in f1.
2725  * E.g. /path/foo is not a prefix of /path/foobar/baz, but /path/foobar is. */
2726 int f_name_has_prefix(const struct file_struct *f1, const struct file_struct *f2)
2727 {
2728         found_prefix = 0;
2729         f_name_cmp(f1, f2);
2730         return found_prefix;
2731 }
2732
2733 char *f_name_buf(void)
2734 {
2735         static char names[5][MAXPATHLEN];
2736         static unsigned int n;
2737
2738         n = (n + 1) % (sizeof names / sizeof names[0]);
2739
2740         return names[n];
2741 }
2742
2743 /* Return a copy of the full filename of a flist entry, using the indicated
2744  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
2745  * done because we checked the size when creating the file_struct entry.
2746  */
2747 char *f_name(const struct file_struct *f, char *fbuf)
2748 {
2749         if (!f || !F_IS_ACTIVE(f))
2750                 return NULL;
2751
2752         if (!fbuf)
2753                 fbuf = f_name_buf();
2754
2755         if (f->dirname) {
2756                 int len = strlen(f->dirname);
2757                 memcpy(fbuf, f->dirname, len);
2758                 fbuf[len] = '/';
2759                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
2760         } else
2761                 strlcpy(fbuf, f->basename, MAXPATHLEN);
2762
2763         return fbuf;
2764 }
2765
2766 /* Do a non-recursive scan of the named directory, possibly ignoring all
2767  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
2768  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
2769  * buffer (the functions we call will append names onto the end, but the old
2770  * dir value will be restored on exit). */
2771 struct file_list *get_dirlist(char *dirname, int dlen, int ignore_filter_rules)
2772 {
2773         struct file_list *dirlist;
2774         char dirbuf[MAXPATHLEN];
2775         int save_recurse = recurse;
2776         int save_xfer_dirs = xfer_dirs;
2777         int save_prune_empty_dirs = prune_empty_dirs;
2778
2779         if (dlen < 0) {
2780                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
2781                 if (dlen >= MAXPATHLEN)
2782                         return NULL;
2783                 dirname = dirbuf;
2784         }
2785
2786         dirlist = flist_new(FLIST_TEMP, "get_dirlist");
2787
2788         recurse = 0;
2789         xfer_dirs = 1;
2790         send_directory(ignore_filter_rules ? -2 : -1, dirlist, dirname, dlen, 0);
2791         xfer_dirs = save_xfer_dirs;
2792         recurse = save_recurse;
2793         if (do_progress)
2794                 flist_count_offset += dirlist->used;
2795
2796         prune_empty_dirs = 0;
2797         dirlist->sorted = dirlist->files;
2798         clean_flist(dirlist, 0);
2799         prune_empty_dirs = save_prune_empty_dirs;
2800
2801         if (verbose > 3)
2802                 output_flist(dirlist);
2803
2804         return dirlist;
2805 }