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 struct stats stats;
  67 extern char *filesfrom_host;
  68
  69 extern char curr_dir[MAXPATHLEN];
  70
  71 extern struct chmod_mode_struct *chmod_modes;
  72
  73 extern struct filter_list_struct filter_list;
  74 extern struct filter_list_struct server_filter_list;
  75
  76 #ifdef ICONV_OPTION
  77 extern int ic_ndx;
  78 extern int filesfrom_convert;
  79 extern int need_unsorted_flist;
  80 extern iconv_t ic_send, ic_recv;
  81 #endif
  82
  83 #define PTR_SIZE (sizeof (struct file_struct *))
  84
  85 int io_error;
  86 int checksum_len;
  87 dev_t filesystem_dev; /* used to implement -x */
  88
  89 struct file_list *cur_flist, *first_flist, *dir_flist;
  90 int send_dir_ndx = -1, send_dir_depth = 0;
  91 int flist_cnt = 0; /* how many (non-tmp) file list objects exist */
  92 int file_total = 0; /* total of all active items over all file-lists */
  93 int flist_eof = 0; /* all the file-lists are now known */
  94
  95 /* Starting from protocol version 26, we always use 64-bit ino_t and dev_t
  96  * internally, even if this platform does not allow files to have 64-bit inums.
  97  * The only exception is if we're on a platform with no 64-bit type at all.
  98  *
  99  * Because we use read_longint() to get these off the wire, if you transfer
 100  * devices or (for protocols < 30) hardlinks with dev or inum > 2**32 to a
 101  * machine with no 64-bit types then you will get an overflow error.
 102  *
 103  * Note that if you transfer devices from a 64-bit-devt machine (say, Solaris)
 104  * to a 32-bit-devt machine (say, Linux-2.2/x86) then the device numbers will
 105  * be truncated.  But it's a kind of silly thing to do anyhow. */
 106
 107 /* The tmp_* vars are used as a cache area by make_file() to store data
 108  * that the sender doesn't need to remember in its file list.  The data
 109  * will survive just long enough to be used by send_file_entry(). */
 110 static dev_t tmp_rdev;
 111 #ifdef SUPPORT_HARD_LINKS
 112 static int64 tmp_dev, tmp_ino;
 113 #endif
 114 static char tmp_sum[MAX_DIGEST_LEN];
 115
 116 static char empty_sum[MAX_DIGEST_LEN];
 117 static int flist_count_offset; /* for --delete --progress */
 118 static int dir_count = 0;
 119 static int high_hlink_ndx;
 120
 121 static void clean_flist(struct file_list *flist, int strip_root);
 122 static void output_flist(struct file_list *flist);
 123
 124 void init_flist(void)
 125 {
 126         if (verbose > 4) {
 127                 rprintf(FINFO, "FILE_STRUCT_LEN=%d, EXTRA_LEN=%d\n",
 128                         (int)FILE_STRUCT_LEN, (int)EXTRA_LEN);
 129         }
 130         checksum_len = protocol_version < 21 ? 2
 131                      : protocol_version < 30 ? MD4_DIGEST_LEN
 132                      : MD5_DIGEST_LEN;
 133 }
 134
 135 static int show_filelist_p(void)
 136 {
 137         return verbose && xfer_dirs && !am_server && !inc_recurse;
 138 }
 139
 140 static void start_filelist_progress(char *kind)
 141 {
 142         rprintf(FCLIENT, "%s ... ", kind);
 143         if (verbose > 1 || do_progress)
 144                 rprintf(FCLIENT, "\n");
 145         rflush(FINFO);
 146 }
 147
 148 static void emit_filelist_progress(int count)
 149 {
 150         rprintf(FCLIENT, " %d files...\r", count);
 151 }
 152
 153 static void maybe_emit_filelist_progress(int count)
 154 {
 155         if (do_progress && show_filelist_p() && (count % 100) == 0)
 156                 emit_filelist_progress(count);
 157 }
 158
 159 static void finish_filelist_progress(const struct file_list *flist)
 160 {
 161         if (do_progress) {
 162                 /* This overwrites the progress line */
 163                 rprintf(FINFO, "%d file%sto consider\n",
 164                         flist->used, flist->used == 1 ? " " : "s ");
 165         } else
 166                 rprintf(FINFO, "done\n");
 167 }
 168
 169 void show_flist_stats(void)
 170 {
 171         /* Nothing yet */
 172 }
 173
 174 /* Stat either a symlink or its referent, depending on the settings of
 175  * copy_links, copy_unsafe_links, etc.  Returns -1 on error, 0 on success.
 176  *
 177  * If path is the name of a symlink, then the linkbuf buffer (which must hold
 178  * MAXPATHLEN chars) will be set to the symlink's target string.
 179  *
 180  * The stat structure pointed to by stp will contain information about the
 181  * link or the referent as appropriate, if they exist. */
 182 static int readlink_stat(const char *path, STRUCT_STAT *stp, char *linkbuf)
 183 {
 184 #ifdef SUPPORT_LINKS
 185         if (link_stat(path, stp, copy_dirlinks) < 0)
 186                 return -1;
 187         if (S_ISLNK(stp->st_mode)) {
 188                 int llen = readlink(path, linkbuf, MAXPATHLEN - 1);
 189                 if (llen < 0)
 190                         return -1;
 191                 linkbuf[llen] = '\0';
 192                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 193                         if (verbose > 1) {
 194                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 195                                         path, linkbuf);
 196                         }
 197                         return x_stat(path, stp, NULL);
 198                 }
 199         }
 200         return 0;
 201 #else
 202         return x_stat(path, stp, NULL);
 203 #endif
 204 }
 205
 206 int link_stat(const char *path, STRUCT_STAT *stp, int follow_dirlinks)
 207 {
 208 #ifdef SUPPORT_LINKS
 209         if (copy_links)
 210                 return x_stat(path, stp, NULL);
 211         if (x_lstat(path, stp, NULL) < 0)
 212                 return -1;
 213         if (follow_dirlinks && S_ISLNK(stp->st_mode)) {
 214                 STRUCT_STAT st;
 215                 if (x_stat(path, &st, NULL) == 0 && S_ISDIR(st.st_mode))
 216                         *stp = st;
 217         }
 218         return 0;
 219 #else
 220         return x_stat(path, stp, NULL);
 221 #endif
 222 }
 223
 224 /* This function is used to check if a file should be included/excluded
 225  * from the list of files based on its name and type etc.  The value of
 226  * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
 227 static int is_excluded(char *fname, int is_dir, int filter_level)
 228 {
 229 #if 0 /* This currently never happens, so avoid a useless compare. */
 230         if (filter_level == NO_FILTERS)
 231                 return 0;
 232 #endif
 233         if (fname) {
 234                 /* never exclude '.', even if somebody does --exclude '*' */
 235                 if (fname[0] == '.' && !fname[1])
 236                         return 0;
 237                 /* Handle the -R version of the '.' dir. */
 238                 if (fname[0] == '/') {
 239                         int len = strlen(fname);
 240                         if (fname[len-1] == '.' && fname[len-2] == '/')
 241                                 return 0;
 242                 }
 243         }
 244         if (server_filter_list.head
 245             && check_filter(&server_filter_list, fname, is_dir) < 0)
 246                 return 1;
 247         if (filter_level != ALL_FILTERS)
 248                 return 0;
 249         if (filter_list.head
 250             && check_filter(&filter_list, fname, is_dir) < 0)
 251                 return 1;
 252         return 0;
 253 }
 254
 255 static void send_directory(int f, struct file_list *flist,
 256                            char *fbuf, int len, int flags);
 257
 258 static const char *pathname, *orig_dir;
 259 static int pathname_len;
 260
 261
 262 /* Make sure flist can hold at least flist->used + extra entries. */
 263 static void flist_expand(struct file_list *flist, int extra)
 264 {
 265         struct file_struct **new_ptr;
 266
 267         if (flist->used + extra <= flist->malloced)
 268                 return;
 269
 270         if (flist->malloced < FLIST_START)
 271                 flist->malloced = FLIST_START;
 272         else if (flist->malloced >= FLIST_LINEAR)
 273                 flist->malloced += FLIST_LINEAR;
 274         else
 275                 flist->malloced *= 2;
 276
 277         /* In case count jumped or we are starting the list
 278          * with a known size just set it. */
 279         if (flist->malloced < flist->used + extra)
 280                 flist->malloced = flist->used + extra;
 281
 282         new_ptr = realloc_array(flist->files, struct file_struct *,
 283                                 flist->malloced);
 284
 285         if (verbose >= 2 && flist->malloced != FLIST_START) {
 286                 rprintf(FCLIENT, "[%s] expand file_list pointer array to %.0f bytes, did%s move\n",
 287                     who_am_i(),
 288                     (double)sizeof flist->files[0] * flist->malloced,
 289                     (new_ptr == flist->files) ? " not" : "");
 290         }
 291
 292         flist->files = new_ptr;
 293
 294         if (!flist->files)
 295                 out_of_memory("flist_expand");
 296 }
 297
 298 static void flist_done_allocating(struct file_list *flist)
 299 {
 300         void *ptr = pool_boundary(flist->file_pool, 8*1024);
 301         if (flist->pool_boundary == ptr)
 302                 flist->pool_boundary = NULL; /* list didn't use any pool memory */
 303         else
 304                 flist->pool_boundary = ptr;
 305 }
 306
 307 int push_pathname(const char *dir, int len)
 308 {
 309         if (dir == pathname)
 310                 return 1;
 311
 312         if (!orig_dir)
 313                 orig_dir = strdup(curr_dir);
 314
 315         if (pathname && !pop_dir(orig_dir)) {
 316                 rsyserr(FERROR, errno, "pop_dir %s failed",
 317                         full_fname(orig_dir));
 318                 exit_cleanup(RERR_FILESELECT);
 319         }
 320
 321         if (dir && !push_dir(dir, 0)) {
 322                 io_error |= IOERR_GENERAL;
 323                 rsyserr(FERROR, errno, "push_dir %s failed in %s",
 324                         full_fname(dir), curr_dir);
 325                 return 0;
 326         }
 327
 328         pathname = dir;
 329         pathname_len = len >= 0 ? len : dir ? (int)strlen(dir) : 0;
 330
 331         return 1;
 332 }
 333
 334 static void send_file_entry(int f, struct file_struct *file, int ndx, int first_ndx)
 335 {
 336         static time_t modtime;
 337         static mode_t mode;
 338         static int64 dev;
 339         static dev_t rdev;
 340         static uint32 rdev_major;
 341         static uid_t uid;
 342         static gid_t gid;
 343         static char *user_name, *group_name;
 344         static char lastname[MAXPATHLEN];
 345         char fname[MAXPATHLEN];
 346         int first_hlink_ndx = -1;
 347         int l1, l2;
 348         int xflags;
 349
 350 #ifdef ICONV_OPTION
 351         if (ic_send != (iconv_t)-1) {
 352                 xbuf outbuf, inbuf;
 353
 354                 INIT_CONST_XBUF(outbuf, fname);
 355
 356                 if (file->dirname) {
 357                         INIT_XBUF_STRLEN(inbuf, (char*)file->dirname);
 358                         outbuf.size -= 2; /* Reserve room for '/' & 1 more char. */
 359                         if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0)
 360                                 goto convert_error;
 361                         outbuf.size += 2;
 362                         outbuf.buf[outbuf.len++] = '/';
 363                 }
 364
 365                 INIT_XBUF_STRLEN(inbuf, (char*)file->basename);
 366                 if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0) {
 367                   convert_error:
 368                         io_error |= IOERR_GENERAL;
 369                         rprintf(FINFO,
 370                             "[%s] cannot convert filename: %s (%s)\n",
 371                             who_am_i(), f_name(file, fname), strerror(errno));
 372                         return;
 373                 }
 374                 outbuf.buf[outbuf.len] = '\0';
 375         } else
 376 #endif
 377                 f_name(file, fname);
 378
 379         xflags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */
 380
 381         if (file->mode == mode)
 382                 xflags |= XMIT_SAME_MODE;
 383         else
 384                 mode = file->mode;
 385
 386         if (protocol_version >= 30 && S_ISDIR(mode) && !(file->flags & FLAG_XFER_DIR))
 387                 xflags |= XMIT_NON_XFER_DIR;
 388
 389         if ((preserve_devices && IS_DEVICE(mode))
 390          || (preserve_specials && IS_SPECIAL(mode))) {
 391                 if (protocol_version < 28) {
 392                         if (tmp_rdev == rdev)
 393                                 xflags |= XMIT_SAME_RDEV_pre28;
 394                         else
 395                                 rdev = tmp_rdev;
 396                 } else {
 397                         rdev = tmp_rdev;
 398                         if ((uint32)major(rdev) == rdev_major)
 399                                 xflags |= XMIT_SAME_RDEV_MAJOR;
 400                         else
 401                                 rdev_major = major(rdev);
 402                         if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu)
 403                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
 404                 }
 405         } else if (protocol_version < 28)
 406                 rdev = MAKEDEV(0, 0);
 407         if (uid_ndx) {
 408                 if ((uid_t)F_OWNER(file) == uid && *lastname)
 409                         xflags |= XMIT_SAME_UID;
 410                 else {
 411                         uid = F_OWNER(file);
 412                         if (uid_ndx && !numeric_ids) {
 413                                 user_name = add_uid(uid);
 414                                 if (inc_recurse && user_name)
 415                                         xflags |= XMIT_USER_NAME_FOLLOWS;
 416                         }
 417                 }
 418         }
 419         if (gid_ndx) {
 420                 if ((gid_t)F_GROUP(file) == gid && *lastname)
 421                         xflags |= XMIT_SAME_GID;
 422                 else {
 423                         gid = F_GROUP(file);
 424                         if (gid_ndx && !numeric_ids) {
 425                                 group_name = add_gid(gid);
 426                                 if (inc_recurse && group_name)
 427                                         xflags |= XMIT_GROUP_NAME_FOLLOWS;
 428                         }
 429                 }
 430         }
 431         if (file->modtime == modtime)
 432                 xflags |= XMIT_SAME_TIME;
 433         else
 434                 modtime = file->modtime;
 435
 436 #ifdef SUPPORT_HARD_LINKS
 437         if (tmp_dev != 0) {
 438                 if (protocol_version >= 30) {
 439                         struct ht_int64_node *np = idev_find(tmp_dev, tmp_ino);
 440                         first_hlink_ndx = (int32)(long)np->data - 1;
 441                         if (first_hlink_ndx < 0) {
 442                                 high_hlink_ndx = ndx + first_ndx;
 443                                 np->data = (void*)(long)(high_hlink_ndx + 1);
 444                                 xflags |= XMIT_HLINK_FIRST;
 445                         }
 446                         xflags |= XMIT_HLINKED;
 447                 } else {
 448                         if (tmp_dev == dev) {
 449                                 if (protocol_version >= 28)
 450                                         xflags |= XMIT_SAME_DEV_pre30;
 451                         } else
 452                                 dev = tmp_dev;
 453                         xflags |= XMIT_HLINKED;
 454                 }
 455         }
 456 #endif
 457
 458         for (l1 = 0;
 459             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 460             l1++) {}
 461         l2 = strlen(fname+l1);
 462
 463         if (l1 > 0)
 464                 xflags |= XMIT_SAME_NAME;
 465         if (l2 > 255)
 466                 xflags |= XMIT_LONG_NAME;
 467
 468         /* We must make sure we don't send a zero flag byte or the
 469          * other end will terminate the flist transfer.  Note that
 470          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 471          * it's harmless way to add a bit to the first flag byte. */
 472         if (protocol_version >= 28) {
 473                 if (!xflags && !S_ISDIR(mode))
 474                         xflags |= XMIT_TOP_DIR;
 475                 if ((xflags & 0xFF00) || !xflags) {
 476                         xflags |= XMIT_EXTENDED_FLAGS;
 477                         write_shortint(f, xflags);
 478                 } else
 479                         write_byte(f, xflags);
 480         } else {
 481                 if (!(xflags & 0xFF))
 482                         xflags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
 483                 write_byte(f, xflags);
 484         }
 485         if (xflags & XMIT_SAME_NAME)
 486                 write_byte(f, l1);
 487         if (xflags & XMIT_LONG_NAME)
 488                 write_varint30(f, l2);
 489         else
 490                 write_byte(f, l2);
 491         write_buf(f, fname + l1, l2);
 492
 493         if (first_hlink_ndx >= 0) {
 494                 write_varint(f, first_hlink_ndx);
 495                 if (first_hlink_ndx >= first_ndx)
 496                         goto the_end;
 497         }
 498
 499         write_varlong30(f, F_LENGTH(file), 3);
 500         if (!(xflags & XMIT_SAME_TIME)) {
 501                 if (protocol_version >= 30)
 502                         write_varlong(f, modtime, 4);
 503                 else
 504                         write_int(f, modtime);
 505         }
 506         if (!(xflags & XMIT_SAME_MODE))
 507                 write_int(f, to_wire_mode(mode));
 508         if (uid_ndx && !(xflags & XMIT_SAME_UID)) {
 509                 if (protocol_version < 30)
 510                         write_int(f, uid);
 511                 else {
 512                         write_varint(f, uid);
 513                         if (xflags & XMIT_USER_NAME_FOLLOWS) {
 514                                 int len = strlen(user_name);
 515                                 write_byte(f, len);
 516                                 write_buf(f, user_name, len);
 517                         }
 518                 }
 519         }
 520         if (gid_ndx && !(xflags & XMIT_SAME_GID)) {
 521                 if (protocol_version < 30)
 522                         write_int(f, gid);
 523                 else {
 524                         write_varint(f, gid);
 525                         if (xflags & XMIT_GROUP_NAME_FOLLOWS) {
 526                                 int len = strlen(group_name);
 527                                 write_byte(f, len);
 528                                 write_buf(f, group_name, len);
 529                         }
 530                 }
 531         }
 532         if ((preserve_devices && IS_DEVICE(mode))
 533          || (preserve_specials && IS_SPECIAL(mode))) {
 534                 if (protocol_version < 28) {
 535                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 536                                 write_int(f, (int)rdev);
 537                 } else {
 538                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 539                                 write_varint30(f, major(rdev));
 540                         if (protocol_version >= 30)
 541                                 write_varint(f, minor(rdev));
 542                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 543                                 write_byte(f, minor(rdev));
 544                         else
 545                                 write_int(f, minor(rdev));
 546                 }
 547         }
 548
 549 #ifdef SUPPORT_LINKS
 550         if (preserve_links && S_ISLNK(mode)) {
 551                 const char *sl = F_SYMLINK(file);
 552                 int len = strlen(sl);
 553                 write_varint30(f, len);
 554                 write_buf(f, sl, len);
 555         }
 556 #endif
 557
 558 #ifdef SUPPORT_HARD_LINKS
 559         if (tmp_dev != 0 && protocol_version < 30) {
 560                 if (protocol_version < 26) {
 561                         /* 32-bit dev_t and ino_t */
 562                         write_int(f, (int32)dev);
 563                         write_int(f, (int32)tmp_ino);
 564                 } else {
 565                         /* 64-bit dev_t and ino_t */
 566                         if (!(xflags & XMIT_SAME_DEV_pre30))
 567                                 write_longint(f, dev);
 568                         write_longint(f, tmp_ino);
 569                 }
 570         }
 571 #endif
 572
 573         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 574                 const char *sum;
 575                 if (S_ISREG(mode))
 576                         sum = tmp_sum;
 577                 else {
 578                         /* Prior to 28, we sent a useless set of nulls. */
 579                         sum = empty_sum;
 580                 }
 581                 write_buf(f, sum, checksum_len);
 582         }
 583
 584   the_end:
 585         strlcpy(lastname, fname, MAXPATHLEN);
 586
 587         if (S_ISREG(mode) || S_ISLNK(mode))
 588                 stats.total_size += F_LENGTH(file);
 589 }
 590
 591 static struct file_struct *recv_file_entry(struct file_list *flist,
 592                                            int xflags, int f)
 593 {
 594         static int64 modtime;
 595         static mode_t mode;
 596         static int64 dev;
 597         static dev_t rdev;
 598         static uint32 rdev_major;
 599         static uid_t uid;
 600         static gid_t gid;
 601         static uint16 gid_flags;
 602         static char lastname[MAXPATHLEN], *lastdir;
 603         static int lastdir_depth, lastdir_len = -1;
 604         static unsigned int del_hier_name_len = 0;
 605         static int in_del_hier = 0;
 606         char thisname[MAXPATHLEN];
 607         unsigned int l1 = 0, l2 = 0;
 608         int alloc_len, basename_len, linkname_len;
 609         int extra_len = file_extra_cnt * EXTRA_LEN;
 610         int first_hlink_ndx = -1;
 611         OFF_T file_length;
 612         const char *basename;
 613         struct file_struct *file;
 614         alloc_pool_t *pool;
 615         char *bp;
 616
 617         if (xflags & XMIT_SAME_NAME)
 618                 l1 = read_byte(f);
 619
 620         if (xflags & XMIT_LONG_NAME)
 621                 l2 = read_varint30(f);
 622         else
 623                 l2 = read_byte(f);
 624
 625         if (l2 >= MAXPATHLEN - l1) {
 626                 rprintf(FERROR,
 627                         "overflow: xflags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
 628                         xflags, l1, l2, lastname, who_am_i());
 629                 overflow_exit("recv_file_entry");
 630         }
 631
 632         strlcpy(thisname, lastname, l1 + 1);
 633         read_sbuf(f, &thisname[l1], l2);
 634         thisname[l1 + l2] = 0;
 635
 636         /* Abuse basename_len for a moment... */
 637         basename_len = strlcpy(lastname, thisname, MAXPATHLEN);
 638
 639 #ifdef ICONV_OPTION
 640         if (ic_recv != (iconv_t)-1) {
 641                 xbuf outbuf, inbuf;
 642
 643                 INIT_CONST_XBUF(outbuf, thisname);
 644                 INIT_XBUF(inbuf, lastname, basename_len, -1);
 645
 646                 if (iconvbufs(ic_recv, &inbuf, &outbuf, 0) < 0) {
 647                         io_error |= IOERR_GENERAL;
 648                         rprintf(FINFO,
 649                             "[%s] cannot convert filename: %s (%s)\n",
 650                             who_am_i(), lastname, strerror(errno));
 651                         outbuf.len = 0;
 652                 }
 653                 outbuf.buf[outbuf.len] = '\0';
 654         }
 655 #endif
 656
 657         clean_fname(thisname, 0);
 658
 659         if (sanitize_paths)
 660                 sanitize_path(thisname, thisname, "", 0, NULL);
 661
 662         if ((basename = strrchr(thisname, '/')) != NULL) {
 663                 int len = basename++ - thisname;
 664                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
 665                         lastdir = new_array(char, len + 1);
 666                         memcpy(lastdir, thisname, len);
 667                         lastdir[len] = '\0';
 668                         lastdir_len = len;
 669                         lastdir_depth = count_dir_elements(lastdir);
 670                 }
 671         } else
 672                 basename = thisname;
 673         basename_len = strlen(basename) + 1; /* count the '\0' */
 674
 675 #ifdef SUPPORT_HARD_LINKS
 676         if (protocol_version >= 30
 677          && BITS_SETnUNSET(xflags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
 678                 first_hlink_ndx = read_varint(f);
 679                 if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->ndx_start + flist->used) {
 680                         rprintf(FERROR,
 681                                 "hard-link reference out of range: %d (%d)\n",
 682                                 first_hlink_ndx, flist->ndx_start + flist->used);
 683                         exit_cleanup(RERR_PROTOCOL);
 684                 }
 685                 if (first_hlink_ndx >= flist->ndx_start) {
 686                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 687                         file_length = F_LENGTH(first);
 688                         modtime = first->modtime;
 689                         mode = first->mode;
 690                         if (uid_ndx)
 691                                 uid = F_OWNER(first);
 692                         if (gid_ndx)
 693                                 gid = F_GROUP(first);
 694                         if ((preserve_devices && IS_DEVICE(mode))
 695                          || (preserve_specials && IS_SPECIAL(mode))) {
 696                                 uint32 *devp = F_RDEV_P(first);
 697                                 rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
 698                                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 699                         }
 700                         if (preserve_links && S_ISLNK(mode))
 701                                 linkname_len = strlen(F_SYMLINK(first)) + 1;
 702                         else
 703                                 linkname_len = 0;
 704                         goto create_object;
 705                 }
 706         }
 707 #endif
 708
 709         file_length = read_varlong30(f, 3);
 710         if (!(xflags & XMIT_SAME_TIME)) {
 711                 if (protocol_version >= 30) {
 712                         modtime = read_varlong(f, 4);
 713 #if SIZEOF_TIME_T < SIZEOF_INT64
 714                         if ((modtime > INT_MAX || modtime < INT_MIN) && !am_generator) {
 715                                 rprintf(FERROR,
 716                                     "Time value of %s truncated on receiver.\n",
 717                                     lastname);
 718                         }
 719 #endif
 720                 } else
 721                         modtime = read_int(f);
 722         }
 723         if (!(xflags & XMIT_SAME_MODE))
 724                 mode = from_wire_mode(read_int(f));
 725
 726         if (chmod_modes && !S_ISLNK(mode))
 727                 mode = tweak_mode(mode, chmod_modes);
 728
 729         if (uid_ndx && !(xflags & XMIT_SAME_UID)) {
 730                 if (protocol_version < 30)
 731                         uid = (uid_t)read_int(f);
 732                 else {
 733                         uid = (uid_t)read_varint(f);
 734                         if (xflags & XMIT_USER_NAME_FOLLOWS)
 735                                 uid = recv_user_name(f, uid);
 736                         else if (inc_recurse && am_root && !numeric_ids)
 737                                 uid = match_uid(uid);
 738                 }
 739         }
 740         if (gid_ndx && !(xflags & XMIT_SAME_GID)) {
 741                 if (protocol_version < 30)
 742                         gid = (gid_t)read_int(f);
 743                 else {
 744                         gid = (gid_t)read_varint(f);
 745                         gid_flags = 0;
 746                         if (xflags & XMIT_GROUP_NAME_FOLLOWS)
 747                                 gid = recv_group_name(f, gid, &gid_flags);
 748                         else if (inc_recurse && (!am_root || !numeric_ids))
 749                                 gid = match_gid(gid, &gid_flags);
 750                 }
 751         }
 752
 753         if ((preserve_devices && IS_DEVICE(mode))
 754          || (preserve_specials && IS_SPECIAL(mode))) {
 755                 if (protocol_version < 28) {
 756                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 757                                 rdev = (dev_t)read_int(f);
 758                 } else {
 759                         uint32 rdev_minor;
 760                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 761                                 rdev_major = read_varint30(f);
 762                         if (protocol_version >= 30)
 763                                 rdev_minor = read_varint(f);
 764                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 765                                 rdev_minor = read_byte(f);
 766                         else
 767                                 rdev_minor = read_int(f);
 768                         rdev = MAKEDEV(rdev_major, rdev_minor);
 769                 }
 770                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 771                 file_length = 0;
 772         } else if (protocol_version < 28)
 773                 rdev = MAKEDEV(0, 0);
 774
 775 #ifdef SUPPORT_LINKS
 776         if (preserve_links && S_ISLNK(mode)) {
 777                 linkname_len = read_varint30(f) + 1; /* count the '\0' */
 778                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 779                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 780                                 linkname_len - 1);
 781                         overflow_exit("recv_file_entry");
 782                 }
 783         }
 784         else
 785 #endif
 786                 linkname_len = 0;
 787
 788 #ifdef SUPPORT_HARD_LINKS
 789   create_object:
 790         if (preserve_hard_links) {
 791                 if (protocol_version < 28 && S_ISREG(mode))
 792                         xflags |= XMIT_HLINKED;
 793                 if (xflags & XMIT_HLINKED)
 794                         extra_len += (inc_recurse+1) * EXTRA_LEN;
 795         }
 796 #endif
 797
 798 #ifdef SUPPORT_ACLS
 799         /* We need one or two index int32s when we're preserving ACLs. */
 800         if (preserve_acls)
 801                 extra_len += (S_ISDIR(mode) ? 2 : 1) * EXTRA_LEN;
 802 #endif
 803
 804         if (always_checksum && S_ISREG(mode))
 805                 extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
 806
 807         if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
 808                 extra_len += EXTRA_LEN;
 809
 810 #if EXTRA_ROUNDING > 0
 811         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
 812                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
 813 #endif
 814
 815         if (inc_recurse && S_ISDIR(mode)) {
 816                 if (one_file_system) {
 817                         /* Room to save the dir's device for -x */
 818                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 819                 }
 820                 pool = dir_flist->file_pool;
 821         } else
 822                 pool = flist->file_pool;
 823
 824         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
 825                   + linkname_len;
 826         bp = pool_alloc(pool, alloc_len, "recv_file_entry");
 827
 828         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
 829         bp += extra_len;
 830         file = (struct file_struct *)bp;
 831         bp += FILE_STRUCT_LEN;
 832
 833         memcpy(bp, basename, basename_len);
 834         bp += basename_len + linkname_len; /* skip space for symlink too */
 835
 836 #ifdef SUPPORT_HARD_LINKS
 837         if (xflags & XMIT_HLINKED)
 838                 file->flags |= FLAG_HLINKED;
 839 #endif
 840         file->modtime = (time_t)modtime;
 841         file->len32 = (uint32)file_length;
 842         if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
 843                 file->flags |= FLAG_LENGTH64;
 844                 OPT_EXTRA(file, 0)->unum = (uint32)(file_length >> 32);
 845         }
 846         file->mode = mode;
 847         if (uid_ndx)
 848                 F_OWNER(file) = uid;
 849         if (gid_ndx) {
 850                 F_GROUP(file) = gid;
 851                 file->flags |= gid_flags;
 852         }
 853 #ifdef ICONV_OPTION
 854         if (ic_ndx)
 855                 F_NDX(file) = flist->used + flist->ndx_start;
 856 #endif
 857
 858         if (basename != thisname) {
 859                 file->dirname = lastdir;
 860                 F_DEPTH(file) = lastdir_depth + 1;
 861         } else
 862                 F_DEPTH(file) = 1;
 863
 864         if (S_ISDIR(mode)) {
 865                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
 866                         F_DEPTH(file)--;
 867                 if (xflags & XMIT_TOP_DIR) {
 868                         in_del_hier = recurse;
 869                         del_hier_name_len = F_DEPTH(file) == 0 ? 0 : l1 + l2;
 870                         if (relative_paths && del_hier_name_len > 2
 871                             && lastname[del_hier_name_len-1] == '.'
 872                             && lastname[del_hier_name_len-2] == '/')
 873                                 del_hier_name_len -= 2;
 874                         file->flags |= FLAG_TOP_DIR | FLAG_XFER_DIR;
 875                 } else if (protocol_version >= 30) {
 876                         if (!(xflags & XMIT_NON_XFER_DIR))
 877                                 file->flags |= FLAG_XFER_DIR;
 878                 } else if (in_del_hier) {
 879                         if (!relative_paths || !del_hier_name_len
 880                          || (l1 >= del_hier_name_len
 881                           && lastname[del_hier_name_len] == '/'))
 882                                 file->flags |= FLAG_XFER_DIR;
 883                         else
 884                                 in_del_hier = 0;
 885                 }
 886         }
 887
 888         if ((preserve_devices && IS_DEVICE(mode))
 889          || (preserve_specials && IS_SPECIAL(mode))) {
 890                 uint32 *devp = F_RDEV_P(file);
 891                 DEV_MAJOR(devp) = major(rdev);
 892                 DEV_MINOR(devp) = minor(rdev);
 893         }
 894
 895 #ifdef SUPPORT_LINKS
 896         if (linkname_len) {
 897                 bp = (char*)file->basename + basename_len;
 898                 if (first_hlink_ndx >= flist->ndx_start) {
 899                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 900                         memcpy(bp, F_SYMLINK(first), linkname_len);
 901                 } else
 902                         read_sbuf(f, bp, linkname_len - 1);
 903                 if (sanitize_paths)
 904                         sanitize_path(bp, bp, "", lastdir_depth, NULL);
 905         }
 906 #endif
 907
 908 #ifdef SUPPORT_HARD_LINKS
 909         if (preserve_hard_links && xflags & XMIT_HLINKED) {
 910                 if (protocol_version >= 30) {
 911                         if (xflags & XMIT_HLINK_FIRST) {
 912                                 high_hlink_ndx = flist->ndx_start + flist->used;
 913                                 F_HL_GNUM(file) = high_hlink_ndx;
 914                         } else
 915                                 F_HL_GNUM(file) = first_hlink_ndx;
 916                 } else {
 917                         static int32 cnt = 0;
 918                         struct ht_int64_node *np;
 919                         int64 ino;
 920                         int32 ndx;
 921                         if (protocol_version < 26) {
 922                                 dev = read_int(f);
 923                                 ino = read_int(f);
 924                         } else {
 925                                 if (!(xflags & XMIT_SAME_DEV_pre30))
 926                                         dev = read_longint(f);
 927                                 ino = read_longint(f);
 928                         }
 929                         np = idev_find(dev, ino);
 930                         ndx = (int32)(long)np->data - 1;
 931                         if (ndx < 0) {
 932                                 ndx = cnt++;
 933                                 np->data = (void*)(long)cnt;
 934                         }
 935                         F_HL_GNUM(file) = ndx;
 936                 }
 937         }
 938 #endif
 939
 940         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 941                 if (S_ISREG(mode))
 942                         bp = F_SUM(file);
 943                 else {
 944                         /* Prior to 28, we get a useless set of nulls. */
 945                         bp = tmp_sum;
 946                 }
 947                 if (first_hlink_ndx >= flist->ndx_start) {
 948                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 949                         memcpy(bp, F_SUM(first), checksum_len);
 950                 } else
 951                         read_buf(f, bp, checksum_len);
 952         }
 953
 954 #ifdef SUPPORT_ACLS
 955         if (preserve_acls && !S_ISLNK(mode))
 956                 receive_acl(file, f);
 957 #endif
 958 #ifdef SUPPORT_XATTRS
 959         if (preserve_xattrs)
 960                 receive_xattr(file, f );
 961 #endif
 962
 963         if (S_ISREG(mode) || S_ISLNK(mode))
 964                 stats.total_size += file_length;
 965
 966         return file;
 967 }
 968
 969 /* Create a file_struct for a named file by reading its stat() information
 970  * and performing extensive checks against global options.
 971  *
 972  * Returns a pointer to the new file struct, or NULL if there was an error
 973  * or this file should be excluded. */
 974 struct file_struct *make_file(const char *fname, struct file_list *flist,
 975                               STRUCT_STAT *stp, int flags, int filter_level)
 976 {
 977         static char *lastdir;
 978         static int lastdir_len = -1;
 979         struct file_struct *file;
 980         char thisname[MAXPATHLEN];
 981         char linkname[MAXPATHLEN];
 982         int alloc_len, basename_len, linkname_len;
 983         int extra_len = file_extra_cnt * EXTRA_LEN;
 984         const char *basename;
 985         alloc_pool_t *pool;
 986         STRUCT_STAT st;
 987         char *bp;
 988
 989         if (strlcpy(thisname, fname, sizeof thisname) >= sizeof thisname) {
 990                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
 991                 return NULL;
 992         }
 993         clean_fname(thisname, 0);
 994         if (sanitize_paths)
 995                 sanitize_path(thisname, thisname, "", 0, NULL);
 996
 997         if (stp && S_ISDIR(stp->st_mode)) {
 998                 st = *stp; /* Needed for "symlink/." with --relative. */
 999                 *linkname = '\0'; /* make IBM code checker happy */
1000         } else if (readlink_stat(thisname, &st, linkname) != 0) {
1001                 int save_errno = errno;
1002                 /* See if file is excluded before reporting an error. */
1003                 if (filter_level != NO_FILTERS
1004                  && (is_excluded(thisname, 0, filter_level)
1005                   || is_excluded(thisname, 1, filter_level))) {
1006                         if (ignore_perishable && save_errno != ENOENT)
1007                                 non_perishable_cnt++;
1008                         return NULL;
1009                 }
1010                 if (save_errno == ENOENT) {
1011 #ifdef SUPPORT_LINKS
1012                         /* Avoid "vanished" error if symlink points nowhere. */
1013                         if (copy_links && x_lstat(thisname, &st, NULL) == 0
1014                             && S_ISLNK(st.st_mode)) {
1015                                 io_error |= IOERR_GENERAL;
1016                                 rprintf(FERROR, "symlink has no referent: %s\n",
1017                                         full_fname(thisname));
1018                         } else
1019 #endif
1020                         {
1021                                 enum logcode c = am_daemon && protocol_version < 28
1022                                     ? FERROR : FINFO;
1023                                 io_error |= IOERR_VANISHED;
1024                                 rprintf(c, "file has vanished: %s\n",
1025                                         full_fname(thisname));
1026                         }
1027                 } else {
1028                         io_error |= IOERR_GENERAL;
1029                         rsyserr(FERROR, save_errno, "readlink %s failed",
1030                                 full_fname(thisname));
1031                 }
1032                 return NULL;
1033         }
1034
1035         /* backup.c calls us with filter_level set to NO_FILTERS. */
1036         if (filter_level == NO_FILTERS)
1037                 goto skip_filters;
1038
1039         if (S_ISDIR(st.st_mode)) {
1040                 if (!xfer_dirs) {
1041                         rprintf(FINFO, "skipping directory %s\n", thisname);
1042                         return NULL;
1043                 }
1044         } else
1045                 flags &= ~FLAG_XFER_DIR;
1046
1047         /* -x only affects directories because we need to avoid recursing
1048          * into a mount-point directory, not to avoid copying a symlinked
1049          * file if -L (or similar) was specified. */
1050         if (one_file_system && S_ISDIR(st.st_mode)) {
1051                 if (flags & FLAG_TOP_DIR)
1052                         filesystem_dev = st.st_dev;
1053                 else if (st.st_dev != filesystem_dev) {
1054                         if (one_file_system > 1) {
1055                                 if (verbose > 2) {
1056                                         rprintf(FINFO, "skipping mount-point dir %s\n",
1057                                                 thisname);
1058                                 }
1059                                 return NULL;
1060                         }
1061                         flags |= FLAG_MOUNT_DIR;
1062                 }
1063         }
1064
1065         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level)) {
1066                 if (ignore_perishable)
1067                         non_perishable_cnt++;
1068                 return NULL;
1069         }
1070
1071         if (lp_ignore_nonreadable(module_id)) {
1072 #ifdef SUPPORT_LINKS
1073                 if (!S_ISLNK(st.st_mode))
1074 #endif
1075                         if (access(thisname, R_OK) != 0)
1076                                 return NULL;
1077         }
1078
1079   skip_filters:
1080
1081         /* Only divert a directory in the main transfer. */
1082         if (flist) {
1083                 if (flist->prev && S_ISDIR(st.st_mode)
1084                  && flags & FLAG_DIVERT_DIRS) {
1085                         /* Room for parent/sibling/next-child info. */
1086                         extra_len += DIRNODE_EXTRA_CNT * EXTRA_LEN;
1087                         if (relative_paths)
1088                                 extra_len += PTR_EXTRA_CNT * EXTRA_LEN;
1089                         dir_count++;
1090                         pool = dir_flist->file_pool;
1091                 } else
1092                         pool = flist->file_pool;
1093         } else
1094                 pool = NULL;
1095
1096         if (verbose > 2) {
1097                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
1098                         who_am_i(), thisname, filter_level);
1099         }
1100
1101         if ((basename = strrchr(thisname, '/')) != NULL) {
1102                 int len = basename++ - thisname;
1103                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
1104                         lastdir = new_array(char, len + 1);
1105                         memcpy(lastdir, thisname, len);
1106                         lastdir[len] = '\0';
1107                         lastdir_len = len;
1108                 }
1109         } else
1110                 basename = thisname;
1111         basename_len = strlen(basename) + 1; /* count the '\0' */
1112
1113 #ifdef SUPPORT_LINKS
1114         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
1115 #else
1116         linkname_len = 0;
1117 #endif
1118
1119         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
1120                 extra_len += EXTRA_LEN;
1121
1122 #if EXTRA_ROUNDING > 0
1123         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
1124                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
1125 #endif
1126
1127         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
1128                   + linkname_len;
1129         if (pool)
1130                 bp = pool_alloc(pool, alloc_len, "make_file");
1131         else {
1132                 if (!(bp = new_array(char, alloc_len)))
1133                         out_of_memory("make_file");
1134         }
1135
1136         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
1137         bp += extra_len;
1138         file = (struct file_struct *)bp;
1139         bp += FILE_STRUCT_LEN;
1140
1141         memcpy(bp, basename, basename_len);
1142         bp += basename_len + linkname_len; /* skip space for symlink too */
1143
1144 #ifdef SUPPORT_HARD_LINKS
1145         if (preserve_hard_links && flist && flist->prev) {
1146                 if (protocol_version >= 28
1147                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
1148                  : S_ISREG(st.st_mode)) {
1149                         tmp_dev = st.st_dev;
1150                         tmp_ino = st.st_ino;
1151                 } else
1152                         tmp_dev = 0;
1153         }
1154 #endif
1155
1156 #ifdef HAVE_STRUCT_STAT_ST_RDEV
1157         if (IS_DEVICE(st.st_mode) || IS_SPECIAL(st.st_mode)) {
1158                 tmp_rdev = st.st_rdev;
1159                 st.st_size = 0;
1160         }
1161 #endif
1162
1163         file->flags = flags;
1164         file->modtime = st.st_mtime;
1165         file->len32 = (uint32)st.st_size;
1166         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
1167                 file->flags |= FLAG_LENGTH64;
1168                 OPT_EXTRA(file, 0)->unum = (uint32)(st.st_size >> 32);
1169         }
1170         file->mode = st.st_mode;
1171         if (uid_ndx)
1172                 F_OWNER(file) = st.st_uid;
1173         if (gid_ndx)
1174                 F_GROUP(file) = st.st_gid;
1175
1176         if (basename != thisname)
1177                 file->dirname = lastdir;
1178
1179 #ifdef SUPPORT_LINKS
1180         if (linkname_len) {
1181                 bp = (char*)file->basename + basename_len;
1182                 memcpy(bp, linkname, linkname_len);
1183         }
1184 #endif
1185
1186         if (always_checksum && am_sender && S_ISREG(st.st_mode))
1187                 file_checksum(thisname, tmp_sum, st.st_size);
1188
1189         F_PATHNAME(file) = pathname;
1190
1191         /* This code is only used by the receiver when it is building
1192          * a list of files for a delete pass. */
1193         if (keep_dirlinks && linkname_len && flist) {
1194                 STRUCT_STAT st2;
1195                 int save_mode = file->mode;
1196                 file->mode = S_IFDIR; /* Find a directory with our name. */
1197                 if (flist_find(dir_flist, file) >= 0
1198                  && x_stat(thisname, &st2, NULL) == 0 && S_ISDIR(st2.st_mode)) {
1199                         file->modtime = st2.st_mtime;
1200                         file->len32 = 0;
1201                         file->mode = st2.st_mode;
1202                         if (uid_ndx)
1203                                 F_OWNER(file) = st2.st_uid;
1204                         if (gid_ndx)
1205                                 F_GROUP(file) = st2.st_gid;
1206                 } else
1207                         file->mode = save_mode;
1208         }
1209
1210         if (basename_len == 0+1)
1211                 return NULL;
1212
1213 #ifdef ICONV_OPTION
1214         if (ic_ndx)
1215                 F_NDX(file) = dir_count - 1;
1216 #endif
1217
1218         return file;
1219 }
1220
1221 /* Only called for temporary file_struct entries created by make_file(). */
1222 void unmake_file(struct file_struct *file)
1223 {
1224         int extra_cnt = file_extra_cnt + LEN64_BUMP(file);
1225 #if EXTRA_ROUNDING > 0
1226         if (extra_cnt & EXTRA_ROUNDING)
1227                 extra_cnt = (extra_cnt | EXTRA_ROUNDING) + 1;
1228 #endif
1229         free(REQ_EXTRA(file, extra_cnt));
1230 }
1231
1232 static struct file_struct *send_file_name(int f, struct file_list *flist,
1233                                           char *fname, STRUCT_STAT *stp,
1234                                           int flags, int filter_level)
1235 {
1236         struct file_struct *file;
1237 #if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
1238         statx sx;
1239 #endif
1240
1241         file = make_file(fname, flist, stp, flags, filter_level);
1242         if (!file)
1243                 return NULL;
1244
1245         if (chmod_modes && !S_ISLNK(file->mode))
1246                 file->mode = tweak_mode(file->mode, chmod_modes);
1247
1248 #ifdef SUPPORT_ACLS
1249         if (preserve_acls && !S_ISLNK(file->mode) && f >= 0) {
1250                 sx.st.st_mode = file->mode;
1251                 sx.acc_acl = sx.def_acl = NULL;
1252                 if (get_acl(fname, &sx) < 0)
1253                         return NULL;
1254         }
1255 #endif
1256 #ifdef SUPPORT_XATTRS
1257         if (preserve_xattrs && f >= 0) {
1258                 sx.xattr = NULL;
1259                 if (get_xattr(fname, &sx) < 0)
1260                         return NULL;
1261         }
1262 #endif
1263
1264         maybe_emit_filelist_progress(flist->used + flist_count_offset);
1265
1266         flist_expand(flist, 1);
1267         flist->files[flist->used++] = file;
1268         if (f >= 0) {
1269                 send_file_entry(f, file, flist->used - 1, flist->ndx_start);
1270 #ifdef SUPPORT_ACLS
1271                 if (preserve_acls && !S_ISLNK(file->mode)) {
1272                         send_acl(&sx, f);
1273                         free_acl(&sx);
1274                 }
1275 #endif
1276 #ifdef SUPPORT_XATTRS
1277                 if (preserve_xattrs) {
1278                         F_XATTR(file) = send_xattr(&sx, f);
1279                         free_xattr(&sx);
1280                 }
1281 #endif
1282         }
1283         return file;
1284 }
1285
1286 static void send_if_directory(int f, struct file_list *flist,
1287                               struct file_struct *file,
1288                               char *fbuf, unsigned int ol,
1289                               int flags)
1290 {
1291         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1292
1293         if (S_ISDIR(file->mode)
1294             && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) {
1295                 void *save_filters;
1296                 unsigned int len = strlen(fbuf);
1297                 if (len > 1 && fbuf[len-1] == '/')
1298                         fbuf[--len] = '\0';
1299                 if (len >= MAXPATHLEN - 1) {
1300                         io_error |= IOERR_GENERAL;
1301                         rprintf(FERROR, "skipping long-named directory: %s\n",
1302                                 full_fname(fbuf));
1303                         return;
1304                 }
1305                 save_filters = push_local_filters(fbuf, len);
1306                 send_directory(f, flist, fbuf, len, flags);
1307                 pop_local_filters(save_filters);
1308                 fbuf[ol] = '\0';
1309                 if (is_dot_dir)
1310                         fbuf[ol-1] = '.';
1311         }
1312 }
1313
1314 static int file_compare(const void *file1, const void *file2)
1315 {
1316         return f_name_cmp(*(struct file_struct **)file1,
1317                           *(struct file_struct **)file2);
1318 }
1319
1320 /* The guts of a merge-sort algorithm.  This was derived from the glibc
1321  * version, but I (Wayne) changed the merge code to do less copying and
1322  * to require only half the amount of temporary memory. */
1323 static void fsort_tmp(struct file_struct **fp, size_t num,
1324                       struct file_struct **tmp)
1325 {
1326         struct file_struct **f1, **f2, **t;
1327         size_t n1, n2;
1328
1329         n1 = num / 2;
1330         n2 = num - n1;
1331         f1 = fp;
1332         f2 = fp + n1;
1333
1334         if (n1 > 1)
1335                 fsort_tmp(f1, n1, tmp);
1336         if (n2 > 1)
1337                 fsort_tmp(f2, n2, tmp);
1338
1339         while (f_name_cmp(*f1, *f2) <= 0) {
1340                 if (!--n1)
1341                         return;
1342                 f1++;
1343         }
1344
1345         t = tmp;
1346         memcpy(t, f1, n1 * PTR_SIZE);
1347
1348         *f1++ = *f2++, n2--;
1349
1350         while (n1 > 0 && n2 > 0) {
1351                 if (f_name_cmp(*t, *f2) <= 0)
1352                         *f1++ = *t++, n1--;
1353                 else
1354                         *f1++ = *f2++, n2--;
1355         }
1356
1357         if (n1 > 0)
1358                 memcpy(f1, t, n1 * PTR_SIZE);
1359 }
1360
1361 /* This file-struct sorting routine makes sure that any identical names in
1362  * the file list stay in the same order as they were in the original list.
1363  * This is particularly vital in inc_recurse mode where we expect a sort
1364  * on the flist to match the exact order of a sort on the dir_flist. */
1365 static void fsort(struct file_struct **fp, size_t num)
1366 {
1367         if (num <= 1)
1368                 return;
1369
1370         if (use_qsort)
1371                 qsort(fp, num, PTR_SIZE, file_compare);
1372         else {
1373                 struct file_struct **tmp = new_array(struct file_struct *,
1374                                                      (num+1) / 2);
1375                 fsort_tmp(fp, num, tmp);
1376                 free(tmp);
1377         }
1378 }
1379
1380 /* We take an entire set of sibling dirs from the sorted flist and link them
1381  * into the tree, setting the appropriate parent/child/sibling pointers. */
1382 static void add_dirs_to_tree(int parent_ndx, struct file_list *from_flist,
1383                              int dir_cnt)
1384 {
1385         int i;
1386         int32 *dp = NULL;
1387         int32 *parent_dp = parent_ndx < 0 ? NULL
1388                          : F_DIR_NODE_P(dir_flist->sorted[parent_ndx]);
1389
1390         flist_expand(dir_flist, dir_cnt);
1391         dir_flist->sorted = dir_flist->files;
1392
1393         for (i = 0; dir_cnt; i++) {
1394                 struct file_struct *file = from_flist->sorted[i];
1395
1396                 if (!S_ISDIR(file->mode))
1397                         continue;
1398
1399                 dir_flist->files[dir_flist->used++] = file;
1400                 dir_cnt--;
1401
1402                 if (file->flags & FLAG_MOUNT_DIR)
1403                         continue;
1404
1405                 if (dp)
1406                         DIR_NEXT_SIBLING(dp) = dir_flist->used - 1;
1407                 else if (parent_dp)
1408                         DIR_FIRST_CHILD(parent_dp) = dir_flist->used - 1;
1409                 else
1410                         send_dir_ndx = dir_flist->used - 1;
1411
1412                 dp = F_DIR_NODE_P(file);
1413                 DIR_PARENT(dp) = parent_ndx;
1414                 DIR_FIRST_CHILD(dp) = -1;
1415         }
1416         if (dp)
1417                 DIR_NEXT_SIBLING(dp) = -1;
1418 }
1419
1420 /* This function is normally called by the sender, but the receiving side also
1421  * calls it from get_dirlist() with f set to -1 so that we just construct the
1422  * file list in memory without sending it over the wire.  Also, get_dirlist()
1423  * might call this with f set to -2, which also indicates that local filter
1424  * rules should be ignored. */
1425 static void send_directory(int f, struct file_list *flist, char *fbuf, int len,
1426                            int flags)
1427 {
1428         struct dirent *di;
1429         unsigned remainder;
1430         char *p;
1431         DIR *d;
1432         int divert_dirs = (flags & FLAG_DIVERT_DIRS) != 0;
1433         int start = flist->used;
1434         int filter_level = f == -2 ? SERVER_FILTERS : ALL_FILTERS;
1435
1436         assert(flist != NULL);
1437
1438         if (!(d = opendir(fbuf))) {
1439                 io_error |= IOERR_GENERAL;
1440                 rsyserr(FERROR, errno, "opendir %s failed", full_fname(fbuf));
1441                 return;
1442         }
1443
1444         p = fbuf + len;
1445         if (len != 1 || *fbuf != '/')
1446                 *p++ = '/';
1447         *p = '\0';
1448         remainder = MAXPATHLEN - (p - fbuf);
1449
1450         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1451                 char *dname = d_name(di);
1452                 if (dname[0] == '.' && (dname[1] == '\0'
1453                     || (dname[1] == '.' && dname[2] == '\0')))
1454                         continue;
1455                 if (strlcpy(p, dname, remainder) >= remainder) {
1456                         io_error |= IOERR_GENERAL;
1457                         rprintf(FINFO,
1458                                 "cannot send long-named file %s\n",
1459                                 full_fname(fbuf));
1460                         continue;
1461                 }
1462                 if (dname[0] == '\0') {
1463                         io_error |= IOERR_GENERAL;
1464                         rprintf(FINFO,
1465                                 "cannot send file with empty name in %s\n",
1466                                 full_fname(fbuf));
1467                         continue;
1468                 }
1469
1470                 send_file_name(f, flist, fbuf, NULL, flags, filter_level);
1471         }
1472
1473         fbuf[len] = '\0';
1474
1475         if (errno) {
1476                 io_error |= IOERR_GENERAL;
1477                 rsyserr(FERROR, errno, "readdir(%s)", full_fname(fbuf));
1478         }
1479
1480         closedir(d);
1481
1482         if (f >= 0 && recurse && !divert_dirs) {
1483                 int i, end = flist->used - 1;
1484                 /* send_if_directory() bumps flist->used, so use "end". */
1485                 for (i = start; i <= end; i++)
1486                         send_if_directory(f, flist, flist->files[i], fbuf, len, flags);
1487         }
1488 }
1489
1490 static char lastpath[MAXPATHLEN] = "";
1491 static int lastpath_len = 0;
1492 static struct file_struct *lastpath_struct;
1493
1494 static void send_implied_dirs(int f, struct file_list *flist, char *fname,
1495                               char *start, char *limit, int flags, int is_dot_dir)
1496 {
1497         struct file_struct *file;
1498         item_list *relname_list;
1499         relnamecache **rnpp;
1500         char *slash;
1501         int len, need_new_dir;
1502
1503         flags &= ~FLAG_XFER_DIR;
1504
1505         if (inc_recurse) {
1506                 if (lastpath_struct && F_PATHNAME(lastpath_struct) == pathname
1507                  && lastpath_len == limit - fname
1508                  && strncmp(lastpath, fname, lastpath_len) == 0)
1509                         need_new_dir = 0;
1510                 else
1511                         need_new_dir = 1;
1512         } else
1513                 need_new_dir = 1;
1514
1515         if (need_new_dir) {
1516                 int save_copy_links = copy_links;
1517                 int save_xfer_dirs = xfer_dirs;
1518
1519                 copy_links = xfer_dirs = 1;
1520
1521                 *limit = '\0';
1522
1523                 for (slash = start; (slash = strchr(slash+1, '/')) != NULL; ) {
1524                         *slash = '\0';
1525                         send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1526                         *slash = '/';
1527                 }
1528
1529                 file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1530                 if (inc_recurse) {
1531                         if (file && !S_ISDIR(file->mode))
1532                                 file = NULL;
1533                         lastpath_struct = file;
1534                 }
1535
1536                 strlcpy(lastpath, fname, sizeof lastpath);
1537                 lastpath_len = limit - fname;
1538
1539                 *limit = '/';
1540
1541                 copy_links = save_copy_links;
1542                 xfer_dirs = save_xfer_dirs;
1543
1544                 if (!inc_recurse)
1545                         return;
1546         }
1547
1548         if (!lastpath_struct)
1549                 return; /* dir must have vanished */
1550
1551         len = strlen(limit+1);
1552         memcpy(&relname_list, F_DIR_RELNAMES_P(lastpath_struct), sizeof relname_list);
1553         if (!relname_list) {
1554                 if (!(relname_list = new0(item_list)))
1555                         out_of_memory("send_implied_dirs");
1556                 memcpy(F_DIR_RELNAMES_P(lastpath_struct), &relname_list, sizeof relname_list);
1557         }
1558         rnpp = EXPAND_ITEM_LIST(relname_list, relnamecache *, 32);
1559         if (!(*rnpp = (relnamecache*)new_array(char, sizeof (relnamecache) + len)))
1560                 out_of_memory("send_implied_dirs");
1561         (*rnpp)->is_dot_dir = is_dot_dir;
1562         strlcpy((*rnpp)->fname, limit+1, len + 1);
1563 }
1564
1565 static void send1extra(int f, struct file_struct *file, struct file_list *flist)
1566 {
1567         char fbuf[MAXPATHLEN];
1568         item_list *relname_list;
1569         int len, dlen, flags = FLAG_DIVERT_DIRS | FLAG_XFER_DIR;
1570         size_t j;
1571
1572         f_name(file, fbuf);
1573         dlen = strlen(fbuf);
1574
1575         if (F_PATHNAME(file) != pathname) {
1576                 if (!push_pathname(F_PATHNAME(file), -1))
1577                         exit_cleanup(RERR_FILESELECT);
1578         }
1579
1580         change_local_filter_dir(fbuf, dlen, send_dir_depth);
1581
1582         if (file->flags & FLAG_XFER_DIR)
1583                 send_directory(f, flist, fbuf, dlen, flags);
1584
1585         if (!relative_paths)
1586                 return;
1587
1588         memcpy(&relname_list, F_DIR_RELNAMES_P(file), sizeof relname_list);
1589         if (!relname_list)
1590                 return;
1591
1592         for (j = 0; j < relname_list->count; j++) {
1593                 char *slash;
1594                 relnamecache *rnp = ((relnamecache**)relname_list->items)[j];
1595                 int is_dot_dir = rnp->is_dot_dir;
1596
1597                 fbuf[dlen] = '/';
1598                 len = strlcpy(fbuf + dlen + 1, rnp->fname, sizeof fbuf - dlen - 1);
1599                 free(rnp);
1600                 if (len >= (int)sizeof fbuf)
1601                         continue; /* Impossible... */
1602
1603                 slash = strchr(fbuf+dlen+1, '/');
1604                 if (slash) {
1605                         send_implied_dirs(f, flist, fbuf, fbuf+dlen+1, slash, flags, is_dot_dir);
1606                         continue;
1607                 }
1608
1609                 if (is_dot_dir) {
1610                         STRUCT_STAT st;
1611                         if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1612                                 io_error |= IOERR_GENERAL;
1613                                 rsyserr(FERROR, errno, "link_stat %s failed",
1614                                         full_fname(fbuf));
1615                                 continue;
1616                         }
1617                         send_file_name(f, flist, fbuf, &st,
1618                             recurse || xfer_dirs ? FLAG_TOP_DIR | flags : flags,
1619                             ALL_FILTERS);
1620                 } else {
1621                         send_file_name(f, flist, fbuf, NULL,
1622                             recurse ? FLAG_TOP_DIR | flags : flags,
1623                             ALL_FILTERS);
1624                 }
1625         }
1626
1627         free(relname_list);
1628 }
1629
1630 void send_extra_file_list(int f, int at_least)
1631 {
1632         struct file_list *flist;
1633         int64 start_write;
1634         int future_cnt, save_io_error = io_error;
1635
1636         if (flist_eof)
1637                 return;
1638
1639         /* Keep sending data until we have the requested number of
1640          * files in the upcoming file-lists. */
1641         if (cur_flist->next) {
1642                 flist = first_flist->prev; /* the newest flist */
1643                 future_cnt = flist->ndx_end - cur_flist->next->ndx_start + 1;
1644         } else
1645                 future_cnt = 0;
1646         while (future_cnt < at_least) {
1647                 struct file_struct *file = dir_flist->sorted[send_dir_ndx];
1648                 int dir_ndx, dstart = dir_count;
1649                 const char *pathname = F_PATHNAME(file);
1650                 int32 *dp;
1651
1652                 flist = flist_new(0, "send_extra_file_list");
1653                 start_write = stats.total_written;
1654
1655 #ifdef ICONV_OPTION
1656                 if (ic_ndx)
1657                         dir_ndx = F_NDX(file);
1658                 else
1659 #endif
1660                         dir_ndx = send_dir_ndx;
1661                 write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
1662                 flist->parent_ndx = dir_ndx;
1663
1664                 send1extra(f, file, flist);
1665                 dp = F_DIR_NODE_P(file);
1666
1667                 /* If there are any duplicate directory names that follow, we
1668                  * send all the dirs together in one file-list.  The dir_flist
1669                  * tree links all the child subdirs onto the last dup dir. */
1670                 while ((dir_ndx = DIR_NEXT_SIBLING(dp)) >= 0
1671                     && dir_flist->sorted[dir_ndx]->flags & FLAG_DUPLICATE) {
1672                         send_dir_ndx = dir_ndx;
1673                         file = dir_flist->sorted[dir_ndx];
1674                         if (F_PATHNAME(file) != pathname)
1675                                 send1extra(f, file, flist);
1676                         dp = F_DIR_NODE_P(file);
1677                 }
1678
1679                 write_byte(f, 0);
1680
1681 #ifdef ICONV_OPTION
1682                 if (need_unsorted_flist) {
1683                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
1684                                 out_of_memory("send_extra_file_list");
1685                         memcpy(flist->sorted, flist->files,
1686                                flist->used * sizeof (struct file_struct*));
1687                 } else
1688 #endif
1689                         flist->sorted = flist->files;
1690
1691                 clean_flist(flist, 0);
1692
1693                 flist->ndx_end = flist->ndx_start + flist->used - 1
1694                                - (dir_count - dstart);
1695
1696                 add_dirs_to_tree(send_dir_ndx, flist, dir_count - dstart);
1697                 flist_done_allocating(flist);
1698
1699                 file_total += flist->used;
1700                 future_cnt += flist->used;
1701                 stats.flist_size += stats.total_written - start_write;
1702                 stats.num_files += flist->used;
1703                 if (verbose > 3)
1704                         output_flist(flist);
1705
1706                 if (DIR_FIRST_CHILD(dp) >= 0) {
1707                         send_dir_ndx = DIR_FIRST_CHILD(dp);
1708                         send_dir_depth++;
1709                 } else {
1710                         while (DIR_NEXT_SIBLING(dp) < 0) {
1711                                 if ((send_dir_ndx = DIR_PARENT(dp)) < 0) {
1712                                         write_ndx(f, NDX_FLIST_EOF);
1713                                         flist_eof = 1;
1714                                         change_local_filter_dir(NULL, 0, 0);
1715                                         goto finish;
1716                                 }
1717                                 send_dir_depth--;
1718                                 file = dir_flist->sorted[send_dir_ndx];
1719                                 dp = F_DIR_NODE_P(file);
1720                         }
1721                         send_dir_ndx = DIR_NEXT_SIBLING(dp);
1722                 }
1723         }
1724
1725   finish:
1726         if (io_error != save_io_error && !ignore_errors)
1727                 send_msg_int(MSG_IO_ERROR, io_error);
1728 }
1729
1730 struct file_list *send_file_list(int f, int argc, char *argv[])
1731 {
1732         static const char *lastdir;
1733         static int lastdir_len = -1;
1734         int len, dirlen;
1735         STRUCT_STAT st;
1736         char *p, *dir;
1737         struct file_list *flist;
1738         struct timeval start_tv, end_tv;
1739         int64 start_write;
1740         int use_ff_fd = 0;
1741         int flags, disable_buffering;
1742         int reading_remotely = filesfrom_host != NULL;
1743         int rl_flags = (reading_remotely ? 0 : RL_DUMP_COMMENTS)
1744 #ifdef ICONV_OPTION
1745                      | (filesfrom_convert ? RL_CONVERT : 0)
1746 #endif
1747                      | (eol_nulls || reading_remotely ? RL_EOL_NULLS : 0);
1748
1749         rprintf(FLOG, "building file list\n");
1750         if (show_filelist_p())
1751                 start_filelist_progress("building file list");
1752         else if (inc_recurse && verbose && !am_server)
1753                 rprintf(FCLIENT, "sending incremental file list\n");
1754
1755         start_write = stats.total_written;
1756         gettimeofday(&start_tv, NULL);
1757
1758 #ifdef SUPPORT_HARD_LINKS
1759         if (preserve_hard_links && protocol_version >= 30 && !cur_flist)
1760                 init_hard_links();
1761 #endif
1762
1763         flist = cur_flist = flist_new(0, "send_file_list");
1764         if (inc_recurse) {
1765                 dir_flist = flist_new(FLIST_TEMP, "send_file_list");
1766                 flags = FLAG_DIVERT_DIRS | FLAG_XFER_DIR;
1767         } else {
1768                 dir_flist = cur_flist;
1769                 flags = FLAG_XFER_DIR;
1770         }
1771
1772         disable_buffering = io_start_buffering_out(f);
1773         if (filesfrom_fd >= 0) {
1774                 if (argv[0] && !push_dir(argv[0], 0)) {
1775                         rsyserr(FERROR, errno, "push_dir %s failed in %s",
1776                                 full_fname(argv[0]), curr_dir);
1777                         exit_cleanup(RERR_FILESELECT);
1778                 }
1779                 use_ff_fd = 1;
1780         }
1781
1782         while (1) {
1783                 char fbuf[MAXPATHLEN];
1784                 char *fn;
1785                 int is_dot_dir;
1786
1787                 if (use_ff_fd) {
1788                         if (read_line(filesfrom_fd, fbuf, sizeof fbuf, rl_flags) == 0)
1789                                 break;
1790                         sanitize_path(fbuf, fbuf, "", 0, NULL);
1791                 } else {
1792                         if (argc-- == 0)
1793                                 break;
1794                         strlcpy(fbuf, *argv++, MAXPATHLEN);
1795                         if (sanitize_paths)
1796                                 sanitize_path(fbuf, fbuf, "", 0, NULL);
1797                 }
1798
1799                 len = strlen(fbuf);
1800                 if (relative_paths) {
1801                         /* We clean up fbuf below. */
1802                         is_dot_dir = 0;
1803                 } else if (!len || fbuf[len - 1] == '/') {
1804                         if (len == 2 && fbuf[0] == '.') {
1805                                 /* Turn "./" into just "." rather than "./." */
1806                                 fbuf[1] = '\0';
1807                         } else {
1808                                 if (len + 1 >= MAXPATHLEN)
1809                                         overflow_exit("send_file_list");
1810                                 fbuf[len++] = '.';
1811                                 fbuf[len] = '\0';
1812                         }
1813                         is_dot_dir = 1;
1814                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
1815                     && (len == 2 || fbuf[len-3] == '/')) {
1816                         if (len + 2 >= MAXPATHLEN)
1817                                 overflow_exit("send_file_list");
1818                         fbuf[len++] = '/';
1819                         fbuf[len++] = '.';
1820                         fbuf[len] = '\0';
1821                         is_dot_dir = 1;
1822                 } else {
1823                         is_dot_dir = fbuf[len-1] == '.'
1824                                    && (len == 1 || fbuf[len-2] == '/');
1825                 }
1826
1827                 dir = NULL;
1828
1829                 if (!relative_paths) {
1830                         p = strrchr(fbuf, '/');
1831                         if (p) {
1832                                 *p = '\0';
1833                                 if (p == fbuf)
1834                                         dir = "/";
1835                                 else
1836                                         dir = fbuf;
1837                                 len -= p - fbuf + 1;
1838                                 fn = p + 1;
1839                         } else
1840                                 fn = fbuf;
1841                 } else {
1842                         if ((p = strstr(fbuf, "/./")) != NULL) {
1843                                 *p = '\0';
1844                                 if (p == fbuf)
1845                                         dir = "/";
1846                                 else
1847                                         dir = fbuf;
1848                                 len -= p - fbuf + 3;
1849                                 fn = p + 3;
1850                         } else
1851                                 fn = fbuf;
1852                         /* Get rid of trailing "/" and "/.". */
1853                         while (len) {
1854                                 if (fn[len - 1] == '/') {
1855                                         is_dot_dir = 1;
1856                                         if (!--len && !dir) {
1857                                                 len++;
1858                                                 break;
1859                                         }
1860                                 }
1861                                 else if (len >= 2 && fn[len - 1] == '.'
1862                                                   && fn[len - 2] == '/') {
1863                                         is_dot_dir = 1;
1864                                         if (!(len -= 2) && !dir) {
1865                                                 len++;
1866                                                 break;
1867                                         }
1868                                 } else
1869                                         break;
1870                         }
1871                         if (len == 1 && fn[0] == '/')
1872                                 fn[len++] = '.';
1873                         fn[len] = '\0';
1874                         /* Reject a ".." dir in the active part of the path. */
1875                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
1876                                 if ((p[2] == '/' || p[2] == '\0')
1877                                  && (p == fn || p[-1] == '/')) {
1878                                         rprintf(FERROR,
1879                                             "found \"..\" dir in relative path: %s\n",
1880                                             fbuf);
1881                                         exit_cleanup(RERR_SYNTAX);
1882                                 }
1883                         }
1884                 }
1885
1886                 if (!*fn) {
1887                         len = 1;
1888                         fn = ".";
1889                 }
1890
1891                 dirlen = dir ? strlen(dir) : 0;
1892                 if (dirlen != lastdir_len || memcmp(lastdir, dir, dirlen) != 0) {
1893                         if (!push_pathname(dir ? strdup(dir) : NULL, dirlen))
1894                                 continue;
1895                         lastdir = pathname;
1896                         lastdir_len = pathname_len;
1897                 } else if (!push_pathname(lastdir, lastdir_len))
1898                         continue;
1899
1900                 if (fn != fbuf)
1901                         memmove(fbuf, fn, len + 1);
1902
1903                 if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1904                         io_error |= IOERR_GENERAL;
1905                         rsyserr(FERROR, errno, "link_stat %s failed",
1906                                 full_fname(fbuf));
1907                         continue;
1908                 }
1909
1910                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
1911                         rprintf(FINFO, "skipping directory %s\n", fbuf);
1912                         continue;
1913                 }
1914
1915                 if (inc_recurse && relative_paths && *fbuf) {
1916                         if ((p = strchr(fbuf+1, '/')) != NULL) {
1917                                 send_implied_dirs(f, flist, fbuf, fbuf, p, flags, is_dot_dir);
1918                                 continue;
1919                         }
1920                 } else if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
1921                         /* Send the implied directories at the start of the
1922                          * source spec, so we get their permissions right. */
1923                         char *lp = lastpath, *slash = fbuf;
1924                         *p = '\0';
1925                         /* Skip any initial directories in our path that we
1926                          * have in common with lastpath. */
1927                         for (fn = fbuf; *fn && *lp == *fn; lp++, fn++) {
1928                                 if (*fn == '/')
1929                                         slash = fn;
1930                         }
1931                         *p = '/';
1932                         if (fn != p || (*lp && *lp != '/'))
1933                                 send_implied_dirs(f, flist, fbuf, slash, p, flags, 0);
1934                 }
1935
1936                 if (recurse || (xfer_dirs && is_dot_dir)) {
1937                         struct file_struct *file;
1938                         int top_flags = FLAG_TOP_DIR | flags;
1939                         file = send_file_name(f, flist, fbuf, &st,
1940                                               top_flags, ALL_FILTERS);
1941                         if (file && !inc_recurse)
1942                                 send_if_directory(f, flist, file, fbuf, len, flags);
1943                 } else
1944                         send_file_name(f, flist, fbuf, &st, flags, ALL_FILTERS);
1945         }
1946
1947         gettimeofday(&end_tv, NULL);
1948         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
1949                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
1950         if (stats.flist_buildtime == 0)
1951                 stats.flist_buildtime = 1;
1952         start_tv = end_tv;
1953
1954         write_byte(f, 0); /* Indicate end of file list */
1955
1956 #ifdef SUPPORT_HARD_LINKS
1957         if (preserve_hard_links && protocol_version >= 30 && !inc_recurse)
1958                 idev_destroy();
1959 #endif
1960
1961         if (show_filelist_p())
1962                 finish_filelist_progress(flist);
1963
1964         gettimeofday(&end_tv, NULL);
1965         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
1966                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
1967
1968         /* When converting names, both sides keep an unsorted file-list array
1969          * because the names will differ on the sending and receiving sides
1970          * (both sides will use the unsorted index number for each item). */
1971
1972         /* Sort the list without removing any duplicates.  This allows the
1973          * receiving side to ask for whatever name it kept.  For incremental
1974          * recursion mode, the sender marks duplicate dirs so that it can
1975          * send them together in a single file-list. */
1976 #ifdef ICONV_OPTION
1977         if (need_unsorted_flist) {
1978                 if (inc_recurse) {
1979                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
1980                                 out_of_memory("send_file_list");
1981                         memcpy(flist->sorted, flist->files,
1982                                flist->used * sizeof (struct file_struct*));
1983                         clean_flist(flist, 0);
1984                 } else {
1985                         flist->sorted = flist->files;
1986                         flist->low = 0;
1987                         flist->high = flist->used - 1;
1988                 }
1989         } else
1990 #endif
1991         {
1992                 flist->sorted = flist->files;
1993                 clean_flist(flist, 0);
1994         }
1995         file_total += flist->used;
1996
1997         /* We don't subtract dir_count for the first send since we
1998          * might have one or more dot dirs which need to get sent. */
1999         flist->ndx_end = flist->ndx_start + flist->used - 1;
2000
2001         if (!numeric_ids && !inc_recurse)
2002                 send_id_list(f);
2003
2004         /* send the io_error flag */
2005         if (protocol_version < 30)
2006                 write_int(f, ignore_errors ? 0 : io_error);
2007         else if (io_error && !ignore_errors)
2008                 send_msg_int(MSG_IO_ERROR, io_error);
2009
2010         if (disable_buffering)
2011                 io_end_buffering_out();
2012
2013         stats.flist_size = stats.total_written - start_write;
2014         stats.num_files = flist->used;
2015
2016         if (verbose > 3)
2017                 output_flist(flist);
2018
2019         if (verbose > 2)
2020                 rprintf(FINFO, "send_file_list done\n");
2021
2022         if (inc_recurse) {
2023                 add_dirs_to_tree(-1, flist, dir_count);
2024                 flist_done_allocating(flist);
2025                 if (send_dir_ndx < 0) {
2026                         write_ndx(f, NDX_FLIST_EOF);
2027                         flist_eof = 1;
2028                 }
2029                 else if (file_total == 1) {
2030                         /* If we're creating incremental file-lists and there
2031                          * was just 1 item in the first file-list, send 1 more
2032                          * file-list to check if this is a 1-file xfer. */
2033                         send_extra_file_list(f, 1);
2034                 }
2035         }
2036
2037         return flist;
2038 }
2039
2040 struct file_list *recv_file_list(int f)
2041 {
2042         struct file_list *flist;
2043         int dstart, flags;
2044         int64 start_read;
2045
2046         if (!first_flist)
2047                 rprintf(FLOG, "receiving file list\n");
2048         if (show_filelist_p())
2049                 start_filelist_progress("receiving file list");
2050         else if (inc_recurse && verbose && !am_server && !first_flist)
2051                 rprintf(FCLIENT, "receiving incremental file list\n");
2052
2053         start_read = stats.total_read;
2054
2055 #ifdef SUPPORT_HARD_LINKS
2056         if (preserve_hard_links && !first_flist)
2057                 init_hard_links();
2058 #endif
2059
2060         flist = flist_new(0, "recv_file_list");
2061
2062         if (inc_recurse) {
2063                 if (flist->ndx_start == 0)
2064                         dir_flist = flist_new(FLIST_TEMP, "recv_file_list");
2065                 dstart = dir_flist->used;
2066         } else {
2067                 dir_flist = flist;
2068                 dstart = 0;
2069         }
2070
2071         while ((flags = read_byte(f)) != 0) {
2072                 struct file_struct *file;
2073
2074                 flist_expand(flist, 1);
2075
2076                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
2077                         flags |= read_byte(f) << 8;
2078                 file = recv_file_entry(flist, flags, f);
2079
2080                 if (inc_recurse && S_ISDIR(file->mode)) {
2081                         flist_expand(dir_flist, 1);
2082                         dir_flist->files[dir_flist->used++] = file;
2083                 }
2084
2085                 flist->files[flist->used++] = file;
2086
2087                 maybe_emit_filelist_progress(flist->used);
2088
2089                 if (verbose > 2) {
2090                         rprintf(FINFO, "recv_file_name(%s)\n",
2091                                 f_name(file, NULL));
2092                 }
2093         }
2094         file_total += flist->used;
2095
2096         flist->ndx_end = flist->ndx_start + flist->used - 1;
2097         if (inc_recurse && flist->ndx_start)
2098                 flist->ndx_end -= dir_flist->used - dstart;
2099
2100         if (verbose > 2)
2101                 rprintf(FINFO, "received %d names\n", flist->used);
2102
2103         if (show_filelist_p())
2104                 finish_filelist_progress(flist);
2105
2106 #ifdef ICONV_OPTION
2107         if (need_unsorted_flist) {
2108                 /* Create an extra array of index pointers that we can sort for
2109                  * the generator's use (for wading through the files in sorted
2110                  * order and for calling flist_find()).  We keep the "files"
2111                  * list unsorted for our exchange of index numbers with the
2112                  * other side (since their names may not sort the same). */
2113                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2114                         out_of_memory("recv_file_list");
2115                 memcpy(flist->sorted, flist->files,
2116                        flist->used * sizeof (struct file_struct*));
2117                 if (inc_recurse && dir_flist->used > dstart) {
2118                         dir_flist->sorted = realloc_array(dir_flist->sorted,
2119                                                 struct file_struct *,
2120                                                 dir_flist->used);
2121                         memcpy(dir_flist->sorted + dstart, dir_flist->files + dstart,
2122                                (dir_flist->used - dstart) * sizeof (struct file_struct*));
2123                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2124                 }
2125         } else
2126 #endif
2127         {
2128                 flist->sorted = flist->files;
2129                 if (inc_recurse && dir_flist->used > dstart) {
2130                         dir_flist->sorted = dir_flist->files;
2131                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2132                 }
2133         }
2134
2135         if (inc_recurse)
2136                 flist_done_allocating(flist);
2137         else if (f >= 0)
2138                 recv_id_list(f, flist);
2139
2140         clean_flist(flist, relative_paths);
2141
2142         if (protocol_version < 30) {
2143                 /* Recv the io_error flag */
2144                 if (ignore_errors)
2145                         read_int(f);
2146                 else
2147                         io_error |= read_int(f);
2148         }
2149
2150         if (verbose > 3)
2151                 output_flist(flist);
2152
2153         if (verbose > 2)
2154                 rprintf(FINFO, "recv_file_list done\n");
2155
2156         stats.flist_size += stats.total_read - start_read;
2157         stats.num_files += flist->used;
2158
2159         return flist;
2160 }
2161
2162 /* This is only used once by the receiver if the very first file-list
2163  * has exactly one item in it. */
2164 void recv_additional_file_list(int f)
2165 {
2166         struct file_list *flist;
2167         int ndx = read_ndx(f);
2168         if (ndx == NDX_FLIST_EOF) {
2169                 flist_eof = 1;
2170                 change_local_filter_dir(NULL, 0, 0);
2171         } else {
2172                 ndx = NDX_FLIST_OFFSET - ndx;
2173                 if (ndx < 0 || ndx >= dir_flist->used) {
2174                         ndx = NDX_FLIST_OFFSET - ndx;
2175                         rprintf(FERROR,
2176                                 "[%s] Invalid dir index: %d (%d - %d)\n",
2177                                 who_am_i(), ndx, NDX_FLIST_OFFSET,
2178                                 NDX_FLIST_OFFSET - dir_flist->used + 1);
2179                         exit_cleanup(RERR_PROTOCOL);
2180                 }
2181                 if (verbose > 3) {
2182                         rprintf(FINFO, "[%s] receiving flist for dir %d\n",
2183                                 who_am_i(), ndx);
2184                 }
2185                 flist = recv_file_list(f);
2186                 flist->parent_ndx = ndx;
2187         }
2188 }
2189
2190 /* Search for an identically-named item in the file list.  Note that the
2191  * items must agree in their directory-ness, or no match is returned. */
2192 int flist_find(struct file_list *flist, struct file_struct *f)
2193 {
2194         int low = flist->low, high = flist->high;
2195         int diff, mid, mid_up;
2196
2197         while (low <= high) {
2198                 mid = (low + high) / 2;
2199                 if (F_IS_ACTIVE(flist->sorted[mid]))
2200                         mid_up = mid;
2201                 else {
2202                         /* Scan for the next non-empty entry using the cached
2203                          * distance values.  If the value isn't fully up-to-
2204                          * date, update it. */
2205                         mid_up = mid + F_DEPTH(flist->sorted[mid]);
2206                         if (!F_IS_ACTIVE(flist->sorted[mid_up])) {
2207                                 do {
2208                                     mid_up += F_DEPTH(flist->sorted[mid_up]);
2209                                 } while (!F_IS_ACTIVE(flist->sorted[mid_up]));
2210                                 F_DEPTH(flist->sorted[mid]) = mid_up - mid;
2211                         }
2212                         if (mid_up > high) {
2213                                 /* If there's nothing left above us, set high to
2214                                  * a non-empty entry below us and continue. */
2215                                 high = mid - (int)flist->sorted[mid]->len32;
2216                                 if (!F_IS_ACTIVE(flist->sorted[high])) {
2217                                         do {
2218                                             high -= (int)flist->sorted[high]->len32;
2219                                         } while (!F_IS_ACTIVE(flist->sorted[high]));
2220                                         flist->sorted[mid]->len32 = mid - high;
2221                                 }
2222                                 continue;
2223                         }
2224                 }
2225                 diff = f_name_cmp(flist->sorted[mid_up], f);
2226                 if (diff == 0) {
2227                         if (protocol_version < 29
2228                             && S_ISDIR(flist->sorted[mid_up]->mode)
2229                             != S_ISDIR(f->mode))
2230                                 return -1;
2231                         return mid_up;
2232                 }
2233                 if (diff < 0)
2234                         low = mid_up + 1;
2235                 else
2236                         high = mid - 1;
2237         }
2238         return -1;
2239 }
2240
2241 /*
2242  * Free up any resources a file_struct has allocated
2243  * and clear the file.
2244  */
2245 void clear_file(struct file_struct *file)
2246 {
2247         /* The +1 zeros out the first char of the basename. */
2248         memset(file, 0, FILE_STRUCT_LEN + 1);
2249         /* In an empty entry, F_DEPTH() is an offset to the next non-empty
2250          * entry.  Likewise for len32 in the opposite direction.  We assume
2251          * that we're alone for now since flist_find() will adjust the counts
2252          * it runs into that aren't up-to-date. */
2253         file->len32 = F_DEPTH(file) = 1;
2254 }
2255
2256 /* Allocate a new file list. */
2257 struct file_list *flist_new(int flags, char *msg)
2258 {
2259         struct file_list *flist;
2260
2261         if (!(flist = new0(struct file_list)))
2262                 out_of_memory(msg);
2263
2264         if (flags & FLIST_TEMP) {
2265                 if (!(flist->file_pool = pool_create(SMALL_EXTENT, 0,
2266                                                 out_of_memory, POOL_INTERN)))
2267                         out_of_memory(msg);
2268         } else {
2269                 /* This is a doubly linked list with prev looping back to
2270                  * the end of the list, but the last next pointer is NULL. */
2271                 if (!first_flist) {
2272                         flist->file_pool = pool_create(NORMAL_EXTENT, 0,
2273                                                 out_of_memory, POOL_INTERN);
2274                         if (!flist->file_pool)
2275                                 out_of_memory(msg);
2276
2277                         first_flist = cur_flist = flist->prev = flist;
2278                 } else {
2279                         flist->file_pool = first_flist->file_pool;
2280
2281                         flist->ndx_start = first_flist->prev->ndx_end + 2;
2282                         if (flist->ndx_start <= high_hlink_ndx)
2283                                 flist->ndx_start = high_hlink_ndx + 1;
2284
2285                         flist->prev = first_flist->prev;
2286                         flist->prev->next = first_flist->prev = flist;
2287                 }
2288                 flist->pool_boundary = pool_boundary(flist->file_pool, 0);
2289                 flist_cnt++;
2290         }
2291
2292         return flist;
2293 }
2294
2295 /* Free up all elements in a flist. */
2296 void flist_free(struct file_list *flist)
2297 {
2298         if (!flist->prev) {
2299                 /* Was FLIST_TEMP dir-list. */
2300         } else if (flist == flist->prev) {
2301                 first_flist = cur_flist = NULL;
2302                 file_total = 0;
2303                 flist_cnt = 0;
2304         } else {
2305                 if (flist == cur_flist)
2306                         cur_flist = flist->next;
2307                 if (flist == first_flist)
2308                         first_flist = first_flist->next;
2309                 else {
2310                         flist->prev->next = flist->next;
2311                         if (!flist->next)
2312                                 flist->next = first_flist;
2313                 }
2314                 flist->next->prev = flist->prev;
2315                 file_total -= flist->used;
2316                 flist_cnt--;
2317         }
2318
2319         if (!flist->prev || !flist_cnt)
2320                 pool_destroy(flist->file_pool);
2321         else
2322                 pool_free_old(flist->file_pool, flist->pool_boundary);
2323
2324         if (flist->sorted && flist->sorted != flist->files)
2325                 free(flist->sorted);
2326         free(flist->files);
2327         free(flist);
2328 }
2329
2330 /* This routine ensures we don't have any duplicate names in our file list.
2331  * duplicate names can cause corruption because of the pipelining. */
2332 static void clean_flist(struct file_list *flist, int strip_root)
2333 {
2334         char fbuf[MAXPATHLEN];
2335         int i, prev_i;
2336
2337         if (!flist)
2338                 return;
2339         if (flist->used == 0) {
2340                 flist->high = -1;
2341                 flist->low = 0;
2342                 return;
2343         }
2344
2345         fsort(flist->sorted, flist->used);
2346
2347         if (!am_sender || inc_recurse) {
2348                 for (i = prev_i = 0; i < flist->used; i++) {
2349                         if (F_IS_ACTIVE(flist->sorted[i])) {
2350                                 prev_i = i;
2351                                 break;
2352                         }
2353                 }
2354                 flist->low = prev_i;
2355         } else {
2356                 i = prev_i = flist->used - 1;
2357                 flist->low = 0;
2358         }
2359
2360         while (++i < flist->used) {
2361                 int j;
2362                 struct file_struct *file = flist->sorted[i];
2363
2364                 if (!F_IS_ACTIVE(file))
2365                         continue;
2366                 if (f_name_cmp(file, flist->sorted[prev_i]) == 0)
2367                         j = prev_i;
2368                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
2369                         int save_mode = file->mode;
2370                         /* Make sure that this directory doesn't duplicate a
2371                          * non-directory earlier in the list. */
2372                         flist->high = prev_i;
2373                         file->mode = S_IFREG;
2374                         j = flist_find(flist, file);
2375                         file->mode = save_mode;
2376                 } else
2377                         j = -1;
2378                 if (j >= 0) {
2379                         int keep, drop;
2380                         /* If one is a dir and the other is not, we want to
2381                          * keep the dir because it might have contents in the
2382                          * list.  Otherwise keep the first one. */
2383                         if (S_ISDIR(file->mode)) {
2384                                 struct file_struct *fp = flist->sorted[j];
2385                                 if (!S_ISDIR(fp->mode))
2386                                         keep = i, drop = j;
2387                                 else {
2388                                         if (am_sender)
2389                                                 file->flags |= FLAG_DUPLICATE;
2390                                         keep = j, drop = i;
2391                                 }
2392                         } else
2393                                 keep = j, drop = i;
2394
2395                         if (!am_sender) {
2396                                 if (verbose > 1) {
2397                                         rprintf(FINFO,
2398                                             "removing duplicate name %s from file list (%d)\n",
2399                                             f_name(file, fbuf), drop + flist->ndx_start);
2400                                 }
2401                                 /* Make sure we don't lose track of a user-specified
2402                                  * top directory. */
2403                                 flist->sorted[keep]->flags |= flist->sorted[drop]->flags
2404                                                            & (FLAG_TOP_DIR|FLAG_XFER_DIR);
2405
2406                                 clear_file(flist->sorted[drop]);
2407                         }
2408
2409                         if (keep == i) {
2410                                 if (flist->low == drop) {
2411                                         for (j = drop + 1;
2412                                              j < i && !F_IS_ACTIVE(flist->sorted[j]);
2413                                              j++) {}
2414                                         flist->low = j;
2415                                 }
2416                                 prev_i = i;
2417                         }
2418                 } else
2419                         prev_i = i;
2420         }
2421         flist->high = prev_i;
2422
2423         if (strip_root) {
2424                 /* We need to strip off the leading slashes for relative
2425                  * paths, but this must be done _after_ the sorting phase. */
2426                 for (i = flist->low; i <= flist->high; i++) {
2427                         struct file_struct *file = flist->sorted[i];
2428
2429                         if (!file->dirname)
2430                                 continue;
2431                         while (*file->dirname == '/')
2432                                 file->dirname++;
2433                         if (!*file->dirname)
2434                                 file->dirname = NULL;
2435                 }
2436         }
2437
2438         if (prune_empty_dirs && !am_sender) {
2439                 int j, prev_depth = 0;
2440
2441                 prev_i = 0; /* It's OK that this isn't really true. */
2442
2443                 for (i = flist->low; i <= flist->high; i++) {
2444                         struct file_struct *fp, *file = flist->sorted[i];
2445
2446                         /* This temporarily abuses the F_DEPTH() value for a
2447                          * directory that is in a chain that might get pruned.
2448                          * We restore the old value if it gets a reprieve. */
2449                         if (S_ISDIR(file->mode) && F_DEPTH(file)) {
2450                                 /* Dump empty dirs when coming back down. */
2451                                 for (j = prev_depth; j >= F_DEPTH(file); j--) {
2452                                         fp = flist->sorted[prev_i];
2453                                         if (F_DEPTH(fp) >= 0)
2454                                                 break;
2455                                         prev_i = -F_DEPTH(fp)-1;
2456                                         clear_file(fp);
2457                                 }
2458                                 prev_depth = F_DEPTH(file);
2459                                 if (is_excluded(f_name(file, fbuf), 1,
2460                                                        ALL_FILTERS)) {
2461                                         /* Keep dirs through this dir. */
2462                                         for (j = prev_depth-1; ; j--) {
2463                                                 fp = flist->sorted[prev_i];
2464                                                 if (F_DEPTH(fp) >= 0)
2465                                                         break;
2466                                                 prev_i = -F_DEPTH(fp)-1;
2467                                                 F_DEPTH(fp) = j;
2468                                         }
2469                                 } else
2470                                         F_DEPTH(file) = -prev_i-1;
2471                                 prev_i = i;
2472                         } else {
2473                                 /* Keep dirs through this non-dir. */
2474                                 for (j = prev_depth; ; j--) {
2475                                         fp = flist->sorted[prev_i];
2476                                         if (F_DEPTH(fp) >= 0)
2477                                                 break;
2478                                         prev_i = -F_DEPTH(fp)-1;
2479                                         F_DEPTH(fp) = j;
2480                                 }
2481                         }
2482                 }
2483                 /* Dump all remaining empty dirs. */
2484                 while (1) {
2485                         struct file_struct *fp = flist->sorted[prev_i];
2486                         if (F_DEPTH(fp) >= 0)
2487                                 break;
2488                         prev_i = -F_DEPTH(fp)-1;
2489                         clear_file(fp);
2490                 }
2491
2492                 for (i = flist->low; i <= flist->high; i++) {
2493                         if (F_IS_ACTIVE(flist->sorted[i]))
2494                                 break;
2495                 }
2496                 flist->low = i;
2497                 for (i = flist->high; i >= flist->low; i--) {
2498                         if (F_IS_ACTIVE(flist->sorted[i]))
2499                                 break;
2500                 }
2501                 flist->high = i;
2502         }
2503 }
2504
2505 static void output_flist(struct file_list *flist)
2506 {
2507         char uidbuf[16], gidbuf[16], depthbuf[16];
2508         struct file_struct *file;
2509         const char *root, *dir, *slash, *name, *trail;
2510         const char *who = who_am_i();
2511         int i;
2512
2513         rprintf(FINFO, "[%s] flist start=%d, end=%d, used=%d, low=%d, high=%d\n",
2514                 who, flist->ndx_start, flist->ndx_end, flist->used, flist->low, flist->high);
2515         for (i = 0; i < flist->used; i++) {
2516                 file = flist->sorted[i];
2517                 if ((am_root || am_sender) && uid_ndx) {
2518                         snprintf(uidbuf, sizeof uidbuf, " uid=%u",
2519                                  F_OWNER(file));
2520                 } else
2521                         *uidbuf = '\0';
2522                 if (gid_ndx) {
2523                         static char parens[] = "(\0)\0\0\0";
2524                         char *pp = parens + (file->flags & FLAG_SKIP_GROUP ? 0 : 3);
2525                         snprintf(gidbuf, sizeof gidbuf, " gid=%s%u%s",
2526                                  pp, F_GROUP(file), pp + 2);
2527                 } else
2528                         *gidbuf = '\0';
2529                 if (!am_sender)
2530                         snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file));
2531                 if (F_IS_ACTIVE(file)) {
2532                         root = am_sender ? NS(F_PATHNAME(file)) : depthbuf;
2533                         if ((dir = file->dirname) == NULL)
2534                                 dir = slash = "";
2535                         else
2536                                 slash = "/";
2537                         name = file->basename;
2538                         trail = S_ISDIR(file->mode) ? "/" : "";
2539                 } else
2540                         root = dir = slash = name = trail = "";
2541                 rprintf(FINFO,
2542                         "[%s] i=%d %s %s%s%s%s mode=0%o len=%.0f%s%s flags=%x\n",
2543                         who, i + flist->ndx_start,
2544                         root, dir, slash, name, trail,
2545                         (int)file->mode, (double)F_LENGTH(file),
2546                         uidbuf, gidbuf, file->flags);
2547         }
2548 }
2549
2550 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
2551 enum fnc_type { t_PATH, t_ITEM };
2552
2553 static int found_prefix;
2554
2555 /* Compare the names of two file_struct entities, similar to how strcmp()
2556  * would do if it were operating on the joined strings.
2557  *
2558  * Some differences beginning with protocol_version 29: (1) directory names
2559  * are compared with an assumed trailing slash so that they compare in a
2560  * way that would cause them to sort immediately prior to any content they
2561  * may have; (2) a directory of any name compares after a non-directory of
2562  * any name at the same depth; (3) a directory with name "." compares prior
2563  * to anything else.  These changes mean that a directory and a non-dir
2564  * with the same name will not compare as equal (protocol_version >= 29).
2565  *
2566  * The dirname component can be an empty string, but the basename component
2567  * cannot (and never is in the current codebase).  The basename component
2568  * may be NULL (for a removed item), in which case it is considered to be
2569  * after any existing item. */
2570 int f_name_cmp(const struct file_struct *f1, const struct file_struct *f2)
2571 {
2572         int dif;
2573         const uchar *c1, *c2;
2574         enum fnc_state state1, state2;
2575         enum fnc_type type1, type2;
2576         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
2577
2578         if (!f1 || !F_IS_ACTIVE(f1)) {
2579                 if (!f2 || !F_IS_ACTIVE(f2))
2580                         return 0;
2581                 return -1;
2582         }
2583         if (!f2 || !F_IS_ACTIVE(f2))
2584                 return 1;
2585
2586         c1 = (uchar*)f1->dirname;
2587         c2 = (uchar*)f2->dirname;
2588         if (c1 == c2)
2589                 c1 = c2 = NULL;
2590         if (!c1) {
2591                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2592                 c1 = (const uchar*)f1->basename;
2593                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2594                         type1 = t_ITEM;
2595                         state1 = s_TRAILING;
2596                         c1 = (uchar*)"";
2597                 } else
2598                         state1 = s_BASE;
2599         } else {
2600                 type1 = t_path;
2601                 state1 = s_DIR;
2602         }
2603         if (!c2) {
2604                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2605                 c2 = (const uchar*)f2->basename;
2606                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2607                         type2 = t_ITEM;
2608                         state2 = s_TRAILING;
2609                         c2 = (uchar*)"";
2610                 } else
2611                         state2 = s_BASE;
2612         } else {
2613                 type2 = t_path;
2614                 state2 = s_DIR;
2615         }
2616
2617         if (type1 != type2)
2618                 return type1 == t_PATH ? 1 : -1;
2619
2620         do {
2621                 if (!*c1) {
2622                         switch (state1) {
2623                         case s_DIR:
2624                                 state1 = s_SLASH;
2625                                 c1 = (uchar*)"/";
2626                                 break;
2627                         case s_SLASH:
2628                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2629                                 c1 = (const uchar*)f1->basename;
2630                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2631                                         type1 = t_ITEM;
2632                                         state1 = s_TRAILING;
2633                                         c1 = (uchar*)"";
2634                                 } else
2635                                         state1 = s_BASE;
2636                                 break;
2637                         case s_BASE:
2638                                 state1 = s_TRAILING;
2639                                 if (type1 == t_PATH) {
2640                                         c1 = (uchar*)"/";
2641                                         break;
2642                                 }
2643                                 /* FALL THROUGH */
2644                         case s_TRAILING:
2645                                 type1 = t_ITEM;
2646                                 break;
2647                         }
2648                         if (*c2 && type1 != type2)
2649                                 return type1 == t_PATH ? 1 : -1;
2650                 }
2651                 if (!*c2) {
2652                         switch (state2) {
2653                         case s_DIR:
2654                                 state2 = s_SLASH;
2655                                 c2 = (uchar*)"/";
2656                                 break;
2657                         case s_SLASH:
2658                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2659                                 c2 = (const uchar*)f2->basename;
2660                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2661                                         type2 = t_ITEM;
2662                                         state2 = s_TRAILING;
2663                                         c2 = (uchar*)"";
2664                                 } else
2665                                         state2 = s_BASE;
2666                                 break;
2667                         case s_BASE:
2668                                 state2 = s_TRAILING;
2669                                 if (type2 == t_PATH) {
2670                                         c2 = (uchar*)"/";
2671                                         break;
2672                                 }
2673                                 /* FALL THROUGH */
2674                         case s_TRAILING:
2675                                 found_prefix = 1;
2676                                 if (!*c1)
2677                                         return 0;
2678                                 type2 = t_ITEM;
2679                                 break;
2680                         }
2681                         if (type1 != type2)
2682                                 return type1 == t_PATH ? 1 : -1;
2683                 }
2684         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
2685
2686         return dif;
2687 }
2688
2689 /* Returns 1 if f1's filename has all of f2's filename as a prefix.  This does
2690  * not match if f2's basename is not an exact match of a path element in f1.
2691  * E.g. /path/foo is not a prefix of /path/foobar/baz, but /path/foobar is. */
2692 int f_name_has_prefix(const struct file_struct *f1, const struct file_struct *f2)
2693 {
2694         found_prefix = 0;
2695         f_name_cmp(f1, f2);
2696         return found_prefix;
2697 }
2698
2699 char *f_name_buf(void)
2700 {
2701         static char names[5][MAXPATHLEN];
2702         static unsigned int n;
2703
2704         n = (n + 1) % (sizeof names / sizeof names[0]);
2705
2706         return names[n];
2707 }
2708
2709 /* Return a copy of the full filename of a flist entry, using the indicated
2710  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
2711  * done because we checked the size when creating the file_struct entry.
2712  */
2713 char *f_name(const struct file_struct *f, char *fbuf)
2714 {
2715         if (!f || !F_IS_ACTIVE(f))
2716                 return NULL;
2717
2718         if (!fbuf)
2719                 fbuf = f_name_buf();
2720
2721         if (f->dirname) {
2722                 int len = strlen(f->dirname);
2723                 memcpy(fbuf, f->dirname, len);
2724                 fbuf[len] = '/';
2725                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
2726         } else
2727                 strlcpy(fbuf, f->basename, MAXPATHLEN);
2728
2729         return fbuf;
2730 }
2731
2732 /* Do a non-recursive scan of the named directory, possibly ignoring all
2733  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
2734  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
2735  * buffer (the functions we call will append names onto the end, but the old
2736  * dir value will be restored on exit). */
2737 struct file_list *get_dirlist(char *dirname, int dlen, int ignore_filter_rules)
2738 {
2739         struct file_list *dirlist;
2740         char dirbuf[MAXPATHLEN];
2741         int save_recurse = recurse;
2742         int save_xfer_dirs = xfer_dirs;
2743         int save_prune_empty_dirs = prune_empty_dirs;
2744
2745         if (dlen < 0) {
2746                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
2747                 if (dlen >= MAXPATHLEN)
2748                         return NULL;
2749                 dirname = dirbuf;
2750         }
2751
2752         dirlist = flist_new(FLIST_TEMP, "get_dirlist");
2753
2754         recurse = 0;
2755         xfer_dirs = 1;
2756         send_directory(ignore_filter_rules ? -2 : -1, dirlist, dirname, dlen, 0);
2757         xfer_dirs = save_xfer_dirs;
2758         recurse = save_recurse;
2759         if (do_progress)
2760                 flist_count_offset += dirlist->used;
2761
2762         prune_empty_dirs = 0;
2763         dirlist->sorted = dirlist->files;
2764         clean_flist(dirlist, 0);
2765         prune_empty_dirs = save_prune_empty_dirs;
2766
2767         if (verbose > 3)
2768                 output_flist(dirlist);
2769
2770         return dirlist;
2771 }