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