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