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 && st.st_dev != filesystem_dev
1062                  && BITS_SETnUNSET(flags, FLAG_CONTENT_DIR, FLAG_TOP_DIR)) {
1063                         if (one_file_system > 1) {
1064                                 if (verbose > 1) {
1065                                         rprintf(FINFO,
1066                                             "[%s] skipping mount-point dir %s\n",
1067                                             who_am_i(), thisname);
1068                                 }
1069                                 return NULL;
1070                         }
1071                         flags |= FLAG_MOUNT_DIR;
1072                         flags &= ~FLAG_CONTENT_DIR;
1073                 }
1074         } else
1075                 flags &= ~FLAG_CONTENT_DIR;
1076
1077         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level)) {
1078                 if (ignore_perishable)
1079                         non_perishable_cnt++;
1080                 return NULL;
1081         }
1082
1083         if (lp_ignore_nonreadable(module_id)) {
1084 #ifdef SUPPORT_LINKS
1085                 if (!S_ISLNK(st.st_mode))
1086 #endif
1087                         if (access(thisname, R_OK) != 0)
1088                                 return NULL;
1089         }
1090
1091   skip_filters:
1092
1093         /* Only divert a directory in the main transfer. */
1094         if (flist) {
1095                 if (flist->prev && S_ISDIR(st.st_mode)
1096                  && flags & FLAG_DIVERT_DIRS) {
1097                         /* Room for parent/sibling/next-child info. */
1098                         extra_len += DIRNODE_EXTRA_CNT * EXTRA_LEN;
1099                         if (relative_paths)
1100                                 extra_len += PTR_EXTRA_CNT * EXTRA_LEN;
1101                         dir_count++;
1102                         pool = dir_flist->file_pool;
1103                 } else
1104                         pool = flist->file_pool;
1105         } else
1106                 pool = NULL;
1107
1108         if (verbose > 2) {
1109                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
1110                         who_am_i(), thisname, filter_level);
1111         }
1112
1113         if ((basename = strrchr(thisname, '/')) != NULL) {
1114                 int len = basename++ - thisname;
1115                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
1116                         lastdir = new_array(char, len + 1);
1117                         memcpy(lastdir, thisname, len);
1118                         lastdir[len] = '\0';
1119                         lastdir_len = len;
1120                 }
1121         } else
1122                 basename = thisname;
1123         basename_len = strlen(basename) + 1; /* count the '\0' */
1124
1125 #ifdef SUPPORT_LINKS
1126         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
1127 #else
1128         linkname_len = 0;
1129 #endif
1130
1131         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
1132                 extra_len += EXTRA_LEN;
1133
1134 #if EXTRA_ROUNDING > 0
1135         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
1136                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
1137 #endif
1138
1139         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
1140                   + linkname_len;
1141         if (pool)
1142                 bp = pool_alloc(pool, alloc_len, "make_file");
1143         else {
1144                 if (!(bp = new_array(char, alloc_len)))
1145                         out_of_memory("make_file");
1146         }
1147
1148         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
1149         bp += extra_len;
1150         file = (struct file_struct *)bp;
1151         bp += FILE_STRUCT_LEN;
1152
1153         memcpy(bp, basename, basename_len);
1154         bp += basename_len + linkname_len; /* skip space for symlink too */
1155
1156 #ifdef SUPPORT_HARD_LINKS
1157         if (preserve_hard_links && flist && flist->prev) {
1158                 if (protocol_version >= 28
1159                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
1160                  : S_ISREG(st.st_mode)) {
1161                         tmp_dev = st.st_dev;
1162                         tmp_ino = st.st_ino;
1163                 } else
1164                         tmp_dev = 0;
1165         }
1166 #endif
1167
1168 #ifdef HAVE_STRUCT_STAT_ST_RDEV
1169         if (IS_DEVICE(st.st_mode) || IS_SPECIAL(st.st_mode)) {
1170                 tmp_rdev = st.st_rdev;
1171                 st.st_size = 0;
1172         }
1173 #endif
1174
1175         file->flags = flags;
1176         file->modtime = st.st_mtime;
1177         file->len32 = (uint32)st.st_size;
1178         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
1179                 file->flags |= FLAG_LENGTH64;
1180                 OPT_EXTRA(file, 0)->unum = (uint32)(st.st_size >> 32);
1181         }
1182         file->mode = st.st_mode;
1183         if (uid_ndx)
1184                 F_OWNER(file) = st.st_uid;
1185         if (gid_ndx)
1186                 F_GROUP(file) = st.st_gid;
1187
1188         if (basename != thisname)
1189                 file->dirname = lastdir;
1190
1191 #ifdef SUPPORT_LINKS
1192         if (linkname_len) {
1193                 bp = (char*)file->basename + basename_len;
1194                 memcpy(bp, linkname, linkname_len);
1195         }
1196 #endif
1197
1198         if (always_checksum && am_sender && S_ISREG(st.st_mode))
1199                 file_checksum(thisname, tmp_sum, st.st_size);
1200
1201         F_PATHNAME(file) = pathname;
1202
1203         /* This code is only used by the receiver when it is building
1204          * a list of files for a delete pass. */
1205         if (keep_dirlinks && linkname_len && flist) {
1206                 STRUCT_STAT st2;
1207                 int save_mode = file->mode;
1208                 file->mode = S_IFDIR; /* Find a directory with our name. */
1209                 if (flist_find(dir_flist, file) >= 0
1210                  && x_stat(thisname, &st2, NULL) == 0 && S_ISDIR(st2.st_mode)) {
1211                         file->modtime = st2.st_mtime;
1212                         file->len32 = 0;
1213                         file->mode = st2.st_mode;
1214                         if (uid_ndx)
1215                                 F_OWNER(file) = st2.st_uid;
1216                         if (gid_ndx)
1217                                 F_GROUP(file) = st2.st_gid;
1218                 } else
1219                         file->mode = save_mode;
1220         }
1221
1222         if (basename_len == 0+1)
1223                 return NULL;
1224
1225 #ifdef ICONV_OPTION
1226         if (ic_ndx)
1227                 F_NDX(file) = dir_count - 1;
1228 #endif
1229
1230         return file;
1231 }
1232
1233 /* Only called for temporary file_struct entries created by make_file(). */
1234 void unmake_file(struct file_struct *file)
1235 {
1236         int extra_cnt = file_extra_cnt + LEN64_BUMP(file);
1237 #if EXTRA_ROUNDING > 0
1238         if (extra_cnt & EXTRA_ROUNDING)
1239                 extra_cnt = (extra_cnt | EXTRA_ROUNDING) + 1;
1240 #endif
1241         free(REQ_EXTRA(file, extra_cnt));
1242 }
1243
1244 static struct file_struct *send_file_name(int f, struct file_list *flist,
1245                                           char *fname, STRUCT_STAT *stp,
1246                                           int flags, int filter_level)
1247 {
1248         struct file_struct *file;
1249 #if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
1250         stat_x sx;
1251 #endif
1252
1253         file = make_file(fname, flist, stp, flags, filter_level);
1254         if (!file)
1255                 return NULL;
1256
1257         if (chmod_modes && !S_ISLNK(file->mode))
1258                 file->mode = tweak_mode(file->mode, chmod_modes);
1259
1260 #ifdef SUPPORT_ACLS
1261         if (preserve_acls && !S_ISLNK(file->mode) && f >= 0) {
1262                 sx.st.st_mode = file->mode;
1263                 sx.acc_acl = sx.def_acl = NULL;
1264                 if (get_acl(fname, &sx) < 0)
1265                         return NULL;
1266         }
1267 #endif
1268 #ifdef SUPPORT_XATTRS
1269         if (preserve_xattrs && f >= 0) {
1270                 sx.xattr = NULL;
1271                 if (get_xattr(fname, &sx) < 0)
1272                         return NULL;
1273         }
1274 #endif
1275
1276         maybe_emit_filelist_progress(flist->used + flist_count_offset);
1277
1278         flist_expand(flist, 1);
1279         flist->files[flist->used++] = file;
1280         if (f >= 0) {
1281                 send_file_entry(f, file, flist->used - 1, flist->ndx_start);
1282 #ifdef SUPPORT_ACLS
1283                 if (preserve_acls && !S_ISLNK(file->mode)) {
1284                         send_acl(&sx, f);
1285                         free_acl(&sx);
1286                 }
1287 #endif
1288 #ifdef SUPPORT_XATTRS
1289                 if (preserve_xattrs) {
1290                         F_XATTR(file) = send_xattr(&sx, f);
1291                         free_xattr(&sx);
1292                 }
1293 #endif
1294         }
1295         return file;
1296 }
1297
1298 static void send_if_directory(int f, struct file_list *flist,
1299                               struct file_struct *file,
1300                               char *fbuf, unsigned int ol,
1301                               int flags)
1302 {
1303         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1304
1305         if (S_ISDIR(file->mode)
1306             && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) {
1307                 void *save_filters;
1308                 unsigned int len = strlen(fbuf);
1309                 if (len > 1 && fbuf[len-1] == '/')
1310                         fbuf[--len] = '\0';
1311                 if (len >= MAXPATHLEN - 1) {
1312                         io_error |= IOERR_GENERAL;
1313                         rprintf(FERROR, "skipping long-named directory: %s\n",
1314                                 full_fname(fbuf));
1315                         return;
1316                 }
1317                 save_filters = push_local_filters(fbuf, len);
1318                 send_directory(f, flist, fbuf, len, flags);
1319                 pop_local_filters(save_filters);
1320                 fbuf[ol] = '\0';
1321                 if (is_dot_dir)
1322                         fbuf[ol-1] = '.';
1323         }
1324 }
1325
1326 static int file_compare(const void *file1, const void *file2)
1327 {
1328         return f_name_cmp(*(struct file_struct **)file1,
1329                           *(struct file_struct **)file2);
1330 }
1331
1332 /* The guts of a merge-sort algorithm.  This was derived from the glibc
1333  * version, but I (Wayne) changed the merge code to do less copying and
1334  * to require only half the amount of temporary memory. */
1335 static void fsort_tmp(struct file_struct **fp, size_t num,
1336                       struct file_struct **tmp)
1337 {
1338         struct file_struct **f1, **f2, **t;
1339         size_t n1, n2;
1340
1341         n1 = num / 2;
1342         n2 = num - n1;
1343         f1 = fp;
1344         f2 = fp + n1;
1345
1346         if (n1 > 1)
1347                 fsort_tmp(f1, n1, tmp);
1348         if (n2 > 1)
1349                 fsort_tmp(f2, n2, tmp);
1350
1351         while (f_name_cmp(*f1, *f2) <= 0) {
1352                 if (!--n1)
1353                         return;
1354                 f1++;
1355         }
1356
1357         t = tmp;
1358         memcpy(t, f1, n1 * PTR_SIZE);
1359
1360         *f1++ = *f2++, n2--;
1361
1362         while (n1 > 0 && n2 > 0) {
1363                 if (f_name_cmp(*t, *f2) <= 0)
1364                         *f1++ = *t++, n1--;
1365                 else
1366                         *f1++ = *f2++, n2--;
1367         }
1368
1369         if (n1 > 0)
1370                 memcpy(f1, t, n1 * PTR_SIZE);
1371 }
1372
1373 /* This file-struct sorting routine makes sure that any identical names in
1374  * the file list stay in the same order as they were in the original list.
1375  * This is particularly vital in inc_recurse mode where we expect a sort
1376  * on the flist to match the exact order of a sort on the dir_flist. */
1377 static void fsort(struct file_struct **fp, size_t num)
1378 {
1379         if (num <= 1)
1380                 return;
1381
1382         if (use_qsort)
1383                 qsort(fp, num, PTR_SIZE, file_compare);
1384         else {
1385                 struct file_struct **tmp = new_array(struct file_struct *,
1386                                                      (num+1) / 2);
1387                 fsort_tmp(fp, num, tmp);
1388                 free(tmp);
1389         }
1390 }
1391
1392 /* We take an entire set of sibling dirs from the sorted flist and link them
1393  * into the tree, setting the appropriate parent/child/sibling pointers. */
1394 static void add_dirs_to_tree(int parent_ndx, struct file_list *from_flist,
1395                              int dir_cnt)
1396 {
1397         int i;
1398         int32 *dp = NULL;
1399         int32 *parent_dp = parent_ndx < 0 ? NULL
1400                          : F_DIR_NODE_P(dir_flist->sorted[parent_ndx]);
1401
1402         flist_expand(dir_flist, dir_cnt);
1403         dir_flist->sorted = dir_flist->files;
1404
1405         for (i = 0; dir_cnt; i++) {
1406                 struct file_struct *file = from_flist->sorted[i];
1407
1408                 if (!S_ISDIR(file->mode))
1409                         continue;
1410
1411                 dir_flist->files[dir_flist->used++] = file;
1412                 dir_cnt--;
1413
1414                 if (dp)
1415                         DIR_NEXT_SIBLING(dp) = dir_flist->used - 1;
1416                 else if (parent_dp)
1417                         DIR_FIRST_CHILD(parent_dp) = dir_flist->used - 1;
1418                 else
1419                         send_dir_ndx = dir_flist->used - 1;
1420
1421                 dp = F_DIR_NODE_P(file);
1422                 DIR_PARENT(dp) = parent_ndx;
1423                 DIR_FIRST_CHILD(dp) = -1;
1424         }
1425         if (dp)
1426                 DIR_NEXT_SIBLING(dp) = -1;
1427 }
1428
1429 /* This function is normally called by the sender, but the receiving side also
1430  * calls it from get_dirlist() with f set to -1 so that we just construct the
1431  * file list in memory without sending it over the wire.  Also, get_dirlist()
1432  * might call this with f set to -2, which also indicates that local filter
1433  * rules should be ignored. */
1434 static void send_directory(int f, struct file_list *flist, char *fbuf, int len,
1435                            int flags)
1436 {
1437         struct dirent *di;
1438         unsigned remainder;
1439         char *p;
1440         DIR *d;
1441         int divert_dirs = (flags & FLAG_DIVERT_DIRS) != 0;
1442         int start = flist->used;
1443         int filter_level = f == -2 ? SERVER_FILTERS : ALL_FILTERS;
1444
1445         assert(flist != NULL);
1446
1447         if (!(d = opendir(fbuf))) {
1448                 io_error |= IOERR_GENERAL;
1449                 rsyserr(FERROR, errno, "opendir %s failed", full_fname(fbuf));
1450                 return;
1451         }
1452
1453         p = fbuf + len;
1454         if (len != 1 || *fbuf != '/')
1455                 *p++ = '/';
1456         *p = '\0';
1457         remainder = MAXPATHLEN - (p - fbuf);
1458
1459         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1460                 char *dname = d_name(di);
1461                 if (dname[0] == '.' && (dname[1] == '\0'
1462                     || (dname[1] == '.' && dname[2] == '\0')))
1463                         continue;
1464                 if (strlcpy(p, dname, remainder) >= remainder) {
1465                         io_error |= IOERR_GENERAL;
1466                         rprintf(FINFO,
1467                                 "cannot send long-named file %s\n",
1468                                 full_fname(fbuf));
1469                         continue;
1470                 }
1471                 if (dname[0] == '\0') {
1472                         io_error |= IOERR_GENERAL;
1473                         rprintf(FINFO,
1474                                 "cannot send file with empty name in %s\n",
1475                                 full_fname(fbuf));
1476                         continue;
1477                 }
1478
1479                 send_file_name(f, flist, fbuf, NULL, flags, filter_level);
1480         }
1481
1482         fbuf[len] = '\0';
1483
1484         if (errno) {
1485                 io_error |= IOERR_GENERAL;
1486                 rsyserr(FERROR, errno, "readdir(%s)", full_fname(fbuf));
1487         }
1488
1489         closedir(d);
1490
1491         if (f >= 0 && recurse && !divert_dirs) {
1492                 int i, end = flist->used - 1;
1493                 /* send_if_directory() bumps flist->used, so use "end". */
1494                 for (i = start; i <= end; i++)
1495                         send_if_directory(f, flist, flist->files[i], fbuf, len, flags);
1496         }
1497 }
1498
1499 static char lastpath[MAXPATHLEN] = "";
1500 static int lastpath_len = 0;
1501 static struct file_struct *lastpath_struct;
1502
1503 static void send_implied_dirs(int f, struct file_list *flist, char *fname,
1504                               char *start, char *limit, int flags, int is_dot_dir)
1505 {
1506         struct file_struct *file;
1507         item_list *relname_list;
1508         relnamecache **rnpp;
1509         char *slash;
1510         int len, need_new_dir;
1511
1512         flags = (flags | FLAG_IMPLIED_DIR) & ~(FLAG_TOP_DIR | FLAG_CONTENT_DIR);
1513
1514         if (inc_recurse) {
1515                 if (lastpath_struct && F_PATHNAME(lastpath_struct) == pathname
1516                  && lastpath_len == limit - fname
1517                  && strncmp(lastpath, fname, lastpath_len) == 0)
1518                         need_new_dir = 0;
1519                 else
1520                         need_new_dir = 1;
1521         } else
1522                 need_new_dir = 1;
1523
1524         if (need_new_dir) {
1525                 int save_copy_links = copy_links;
1526                 int save_xfer_dirs = xfer_dirs;
1527
1528                 copy_links = xfer_dirs = 1;
1529
1530                 *limit = '\0';
1531
1532                 for (slash = start; (slash = strchr(slash+1, '/')) != NULL; ) {
1533                         *slash = '\0';
1534                         send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1535                         *slash = '/';
1536                 }
1537
1538                 file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1539                 if (inc_recurse) {
1540                         if (file && !S_ISDIR(file->mode))
1541                                 file = NULL;
1542                         lastpath_struct = file;
1543                 }
1544
1545                 strlcpy(lastpath, fname, sizeof lastpath);
1546                 lastpath_len = limit - fname;
1547
1548                 *limit = '/';
1549
1550                 copy_links = save_copy_links;
1551                 xfer_dirs = save_xfer_dirs;
1552
1553                 if (!inc_recurse)
1554                         return;
1555         }
1556
1557         if (!lastpath_struct)
1558                 return; /* dir must have vanished */
1559
1560         len = strlen(limit+1);
1561         memcpy(&relname_list, F_DIR_RELNAMES_P(lastpath_struct), sizeof relname_list);
1562         if (!relname_list) {
1563                 if (!(relname_list = new0(item_list)))
1564                         out_of_memory("send_implied_dirs");
1565                 memcpy(F_DIR_RELNAMES_P(lastpath_struct), &relname_list, sizeof relname_list);
1566         }
1567         rnpp = EXPAND_ITEM_LIST(relname_list, relnamecache *, 32);
1568         if (!(*rnpp = (relnamecache*)new_array(char, sizeof (relnamecache) + len)))
1569                 out_of_memory("send_implied_dirs");
1570         (*rnpp)->is_dot_dir = is_dot_dir;
1571         strlcpy((*rnpp)->fname, limit+1, len + 1);
1572 }
1573
1574 static void send1extra(int f, struct file_struct *file, struct file_list *flist)
1575 {
1576         char fbuf[MAXPATHLEN];
1577         item_list *relname_list;
1578         int len, dlen, flags = FLAG_DIVERT_DIRS | FLAG_CONTENT_DIR;
1579         size_t j;
1580
1581         f_name(file, fbuf);
1582         dlen = strlen(fbuf);
1583
1584         if (F_PATHNAME(file) != pathname) {
1585                 if (!push_pathname(F_PATHNAME(file), -1))
1586                         exit_cleanup(RERR_FILESELECT);
1587         }
1588
1589         change_local_filter_dir(fbuf, dlen, send_dir_depth);
1590
1591         if (file->flags & FLAG_CONTENT_DIR) {
1592                 if (one_file_system) {
1593                         STRUCT_STAT st;
1594                         if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1595                                 io_error |= IOERR_GENERAL;
1596                                 rsyserr(FERROR, errno, "link_stat %s failed",
1597                                         full_fname(fbuf));
1598                                 return;
1599                         }
1600                         filesystem_dev = st.st_dev;
1601                 }
1602                 send_directory(f, flist, fbuf, dlen, flags);
1603         }
1604
1605         if (!relative_paths)
1606                 return;
1607
1608         memcpy(&relname_list, F_DIR_RELNAMES_P(file), sizeof relname_list);
1609         if (!relname_list)
1610                 return;
1611
1612         for (j = 0; j < relname_list->count; j++) {
1613                 char *slash;
1614                 relnamecache *rnp = ((relnamecache**)relname_list->items)[j];
1615                 int is_dot_dir = rnp->is_dot_dir;
1616
1617                 fbuf[dlen] = '/';
1618                 len = strlcpy(fbuf + dlen + 1, rnp->fname, sizeof fbuf - dlen - 1);
1619                 free(rnp);
1620                 if (len >= (int)sizeof fbuf)
1621                         continue; /* Impossible... */
1622
1623                 slash = strchr(fbuf+dlen+1, '/');
1624                 if (slash) {
1625                         send_implied_dirs(f, flist, fbuf, fbuf+dlen+1, slash, flags, is_dot_dir);
1626                         continue;
1627                 }
1628
1629                 if (is_dot_dir) {
1630                         STRUCT_STAT st;
1631                         if (link_stat(fbuf, &st, 1) != 0) {
1632                                 io_error |= IOERR_GENERAL;
1633                                 rsyserr(FERROR, errno, "link_stat %s failed",
1634                                         full_fname(fbuf));
1635                                 continue;
1636                         }
1637                         send_file_name(f, flist, fbuf, &st, FLAG_TOP_DIR | flags, ALL_FILTERS);
1638                 } else
1639                         send_file_name(f, flist, fbuf, NULL, FLAG_TOP_DIR | flags, ALL_FILTERS);
1640         }
1641
1642         free(relname_list);
1643 }
1644
1645 void send_extra_file_list(int f, int at_least)
1646 {
1647         struct file_list *flist;
1648         int64 start_write;
1649         uint16 prev_flags;
1650         int future_cnt, save_io_error = io_error;
1651
1652         if (flist_eof)
1653                 return;
1654
1655         /* Keep sending data until we have the requested number of
1656          * files in the upcoming file-lists. */
1657         if (cur_flist->next) {
1658                 flist = first_flist->prev; /* the newest flist */
1659                 future_cnt = flist->ndx_end - cur_flist->next->ndx_start + 1;
1660         } else
1661                 future_cnt = 0;
1662         while (future_cnt < at_least) {
1663                 struct file_struct *file = dir_flist->sorted[send_dir_ndx];
1664                 int dir_ndx, dstart = dir_count;
1665                 const char *pathname = F_PATHNAME(file);
1666                 int32 *dp;
1667
1668                 flist = flist_new(0, "send_extra_file_list");
1669                 start_write = stats.total_written;
1670
1671 #ifdef ICONV_OPTION
1672                 if (ic_ndx)
1673                         dir_ndx = F_NDX(file);
1674                 else
1675 #endif
1676                         dir_ndx = send_dir_ndx;
1677                 write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
1678                 flist->parent_ndx = dir_ndx;
1679
1680                 send1extra(f, file, flist);
1681                 prev_flags = file->flags;
1682                 dp = F_DIR_NODE_P(file);
1683
1684                 /* If there are any duplicate directory names that follow, we
1685                  * send all the dirs together in one file-list.  The dir_flist
1686                  * tree links all the child subdirs onto the last dup dir. */
1687                 while ((dir_ndx = DIR_NEXT_SIBLING(dp)) >= 0
1688                     && dir_flist->sorted[dir_ndx]->flags & FLAG_DUPLICATE) {
1689                         send_dir_ndx = dir_ndx;
1690                         file = dir_flist->sorted[dir_ndx];
1691                         /* Try to avoid some duplicate scanning of identical dirs. */
1692                         if (F_PATHNAME(file) == pathname && prev_flags & FLAG_CONTENT_DIR)
1693                                 file->flags &= ~FLAG_CONTENT_DIR;
1694                         send1extra(f, file, flist);
1695                         prev_flags = file->flags;
1696                         dp = F_DIR_NODE_P(file);
1697                 }
1698
1699                 write_byte(f, 0);
1700
1701 #ifdef ICONV_OPTION
1702                 if (need_unsorted_flist) {
1703                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
1704                                 out_of_memory("send_extra_file_list");
1705                         memcpy(flist->sorted, flist->files,
1706                                flist->used * sizeof (struct file_struct*));
1707                 } else
1708 #endif
1709                         flist->sorted = flist->files;
1710
1711                 clean_flist(flist, 0);
1712
1713                 flist->ndx_end = flist->ndx_start + flist->used - 1
1714                                - (dir_count - dstart);
1715
1716                 add_dirs_to_tree(send_dir_ndx, flist, dir_count - dstart);
1717                 flist_done_allocating(flist);
1718
1719                 file_total += flist->used;
1720                 future_cnt += flist->used;
1721                 stats.flist_size += stats.total_written - start_write;
1722                 stats.num_files += flist->used;
1723                 if (verbose > 3)
1724                         output_flist(flist);
1725
1726                 if (DIR_FIRST_CHILD(dp) >= 0) {
1727                         send_dir_ndx = DIR_FIRST_CHILD(dp);
1728                         send_dir_depth++;
1729                 } else {
1730                         while (DIR_NEXT_SIBLING(dp) < 0) {
1731                                 if ((send_dir_ndx = DIR_PARENT(dp)) < 0) {
1732                                         write_ndx(f, NDX_FLIST_EOF);
1733                                         flist_eof = 1;
1734                                         change_local_filter_dir(NULL, 0, 0);
1735                                         goto finish;
1736                                 }
1737                                 send_dir_depth--;
1738                                 file = dir_flist->sorted[send_dir_ndx];
1739                                 dp = F_DIR_NODE_P(file);
1740                         }
1741                         send_dir_ndx = DIR_NEXT_SIBLING(dp);
1742                 }
1743         }
1744
1745   finish:
1746         if (io_error != save_io_error && !ignore_errors)
1747                 send_msg_int(MSG_IO_ERROR, io_error);
1748 }
1749
1750 struct file_list *send_file_list(int f, int argc, char *argv[])
1751 {
1752         static const char *lastdir;
1753         static int lastdir_len = -1;
1754         int len, dirlen;
1755         STRUCT_STAT st;
1756         char *p, *dir;
1757         struct file_list *flist;
1758         struct timeval start_tv, end_tv;
1759         int64 start_write;
1760         int use_ff_fd = 0;
1761         int disable_buffering;
1762         int flags = recurse ? FLAG_CONTENT_DIR : 0;
1763         int reading_remotely = filesfrom_host != NULL;
1764         int rl_flags = (reading_remotely ? 0 : RL_DUMP_COMMENTS)
1765 #ifdef ICONV_OPTION
1766                      | (filesfrom_convert ? RL_CONVERT : 0)
1767 #endif
1768                      | (eol_nulls || reading_remotely ? RL_EOL_NULLS : 0);
1769
1770         rprintf(FLOG, "building file list\n");
1771         if (show_filelist_p())
1772                 start_filelist_progress("building file list");
1773         else if (inc_recurse && verbose && !am_server)
1774                 rprintf(FCLIENT, "sending incremental file list\n");
1775
1776         start_write = stats.total_written;
1777         gettimeofday(&start_tv, NULL);
1778
1779         if (relative_paths && protocol_version >= 30)
1780                 implied_dirs = 1; /* We send flagged implied dirs */
1781
1782 #ifdef SUPPORT_HARD_LINKS
1783         if (preserve_hard_links && protocol_version >= 30 && !cur_flist)
1784                 init_hard_links();
1785 #endif
1786
1787         flist = cur_flist = flist_new(0, "send_file_list");
1788         if (inc_recurse) {
1789                 dir_flist = flist_new(FLIST_TEMP, "send_file_list");
1790                 flags |= FLAG_DIVERT_DIRS;
1791         } else
1792                 dir_flist = cur_flist;
1793
1794         disable_buffering = io_start_buffering_out(f);
1795         if (filesfrom_fd >= 0) {
1796                 if (argv[0] && !push_dir(argv[0], 0)) {
1797                         rsyserr(FERROR, errno, "push_dir %s failed in %s",
1798                                 full_fname(argv[0]), curr_dir);
1799                         exit_cleanup(RERR_FILESELECT);
1800                 }
1801                 use_ff_fd = 1;
1802         }
1803
1804         while (1) {
1805                 char fbuf[MAXPATHLEN];
1806                 char *fn;
1807                 int is_dot_dir;
1808
1809                 if (use_ff_fd) {
1810                         if (read_line(filesfrom_fd, fbuf, sizeof fbuf, rl_flags) == 0)
1811                                 break;
1812                         sanitize_path(fbuf, fbuf, "", 0, NULL);
1813                 } else {
1814                         if (argc-- == 0)
1815                                 break;
1816                         strlcpy(fbuf, *argv++, MAXPATHLEN);
1817                         if (sanitize_paths)
1818                                 sanitize_path(fbuf, fbuf, "", 0, NULL);
1819                 }
1820
1821                 len = strlen(fbuf);
1822                 if (relative_paths) {
1823                         /* We clean up fbuf below. */
1824                         is_dot_dir = 0;
1825                 } else if (!len || fbuf[len - 1] == '/') {
1826                         if (len == 2 && fbuf[0] == '.') {
1827                                 /* Turn "./" into just "." rather than "./." */
1828                                 fbuf[1] = '\0';
1829                         } else {
1830                                 if (len + 1 >= MAXPATHLEN)
1831                                         overflow_exit("send_file_list");
1832                                 fbuf[len++] = '.';
1833                                 fbuf[len] = '\0';
1834                         }
1835                         is_dot_dir = 1;
1836                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
1837                     && (len == 2 || fbuf[len-3] == '/')) {
1838                         if (len + 2 >= MAXPATHLEN)
1839                                 overflow_exit("send_file_list");
1840                         fbuf[len++] = '/';
1841                         fbuf[len++] = '.';
1842                         fbuf[len] = '\0';
1843                         is_dot_dir = 1;
1844                 } else {
1845                         is_dot_dir = fbuf[len-1] == '.'
1846                                    && (len == 1 || fbuf[len-2] == '/');
1847                 }
1848
1849                 dir = NULL;
1850
1851                 if (!relative_paths) {
1852                         p = strrchr(fbuf, '/');
1853                         if (p) {
1854                                 *p = '\0';
1855                                 if (p == fbuf)
1856                                         dir = "/";
1857                                 else
1858                                         dir = fbuf;
1859                                 len -= p - fbuf + 1;
1860                                 fn = p + 1;
1861                         } else
1862                                 fn = fbuf;
1863                 } else {
1864                         if ((p = strstr(fbuf, "/./")) != NULL) {
1865                                 *p = '\0';
1866                                 if (p == fbuf)
1867                                         dir = "/";
1868                                 else
1869                                         dir = fbuf;
1870                                 len -= p - fbuf + 3;
1871                                 fn = p + 3;
1872                         } else
1873                                 fn = fbuf;
1874                         /* Get rid of trailing "/" and "/.". */
1875                         while (len) {
1876                                 if (fn[len - 1] == '/') {
1877                                         is_dot_dir = 1;
1878                                         if (!--len && !dir) {
1879                                                 len++;
1880                                                 break;
1881                                         }
1882                                 }
1883                                 else if (len >= 2 && fn[len - 1] == '.'
1884                                                   && fn[len - 2] == '/') {
1885                                         is_dot_dir = 1;
1886                                         if (!(len -= 2) && !dir) {
1887                                                 len++;
1888                                                 break;
1889                                         }
1890                                 } else
1891                                         break;
1892                         }
1893                         fn[len] = '\0';
1894                         if (len == 1) {
1895                                 if (fn[0] == '/') {
1896                                         fn = "/.";
1897                                         len = 2;
1898                                 } else if (fn[0] == '.')
1899                                         is_dot_dir = 1;
1900                         }
1901                         /* Reject a ".." dir in the active part of the path. */
1902                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
1903                                 if ((p[2] == '/' || p[2] == '\0')
1904                                  && (p == fn || p[-1] == '/')) {
1905                                         rprintf(FERROR,
1906                                             "found \"..\" dir in relative path: %s\n",
1907                                             fbuf);
1908                                         exit_cleanup(RERR_SYNTAX);
1909                                 }
1910                         }
1911                 }
1912
1913                 if (!*fn) {
1914                         len = 1;
1915                         fn = ".";
1916                         is_dot_dir = 1;
1917                 }
1918
1919                 dirlen = dir ? strlen(dir) : 0;
1920                 if (dirlen != lastdir_len || memcmp(lastdir, dir, dirlen) != 0) {
1921                         if (!push_pathname(dir ? strdup(dir) : NULL, dirlen))
1922                                 continue;
1923                         lastdir = pathname;
1924                         lastdir_len = pathname_len;
1925                 } else if (!push_pathname(lastdir, lastdir_len))
1926                         continue;
1927
1928                 if (fn != fbuf)
1929                         memmove(fbuf, fn, len + 1);
1930
1931                 if (link_stat(fbuf, &st, copy_dirlinks || is_dot_dir) != 0) {
1932                         io_error |= IOERR_GENERAL;
1933                         rsyserr(FERROR, errno, "link_stat %s failed",
1934                                 full_fname(fbuf));
1935                         continue;
1936                 }
1937
1938                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
1939                         rprintf(FINFO, "skipping directory %s\n", fbuf);
1940                         continue;
1941                 }
1942
1943                 if (inc_recurse && relative_paths && *fbuf) {
1944                         if ((p = strchr(fbuf+1, '/')) != NULL) {
1945                                 send_implied_dirs(f, flist, fbuf, fbuf, p, flags, is_dot_dir);
1946                                 continue;
1947                         }
1948                 } else if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
1949                         /* Send the implied directories at the start of the
1950                          * source spec, so we get their permissions right. */
1951                         char *lp = lastpath, *slash = fbuf;
1952                         *p = '\0';
1953                         /* Skip any initial directories in our path that we
1954                          * have in common with lastpath. */
1955                         for (fn = fbuf; *fn && *lp == *fn; lp++, fn++) {
1956                                 if (*fn == '/')
1957                                         slash = fn;
1958                         }
1959                         *p = '/';
1960                         if (fn != p || (*lp && *lp != '/'))
1961                                 send_implied_dirs(f, flist, fbuf, slash, p, flags, 0);
1962                 }
1963
1964                 if (one_file_system)
1965                         filesystem_dev = st.st_dev;
1966
1967                 if (recurse || (xfer_dirs && is_dot_dir)) {
1968                         struct file_struct *file;
1969                         int top_flags = FLAG_TOP_DIR | FLAG_CONTENT_DIR | flags;
1970                         file = send_file_name(f, flist, fbuf, &st,
1971                                               top_flags, ALL_FILTERS);
1972                         if (file && !inc_recurse)
1973                                 send_if_directory(f, flist, file, fbuf, len, flags);
1974                 } else
1975                         send_file_name(f, flist, fbuf, &st, flags, ALL_FILTERS);
1976         }
1977
1978         gettimeofday(&end_tv, NULL);
1979         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
1980                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
1981         if (stats.flist_buildtime == 0)
1982                 stats.flist_buildtime = 1;
1983         start_tv = end_tv;
1984
1985         write_byte(f, 0); /* Indicate end of file list */
1986
1987 #ifdef SUPPORT_HARD_LINKS
1988         if (preserve_hard_links && protocol_version >= 30 && !inc_recurse)
1989                 idev_destroy();
1990 #endif
1991
1992         if (show_filelist_p())
1993                 finish_filelist_progress(flist);
1994
1995         gettimeofday(&end_tv, NULL);
1996         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
1997                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
1998
1999         /* When converting names, both sides keep an unsorted file-list array
2000          * because the names will differ on the sending and receiving sides
2001          * (both sides will use the unsorted index number for each item). */
2002
2003         /* Sort the list without removing any duplicates.  This allows the
2004          * receiving side to ask for whatever name it kept.  For incremental
2005          * recursion mode, the sender marks duplicate dirs so that it can
2006          * send them together in a single file-list. */
2007 #ifdef ICONV_OPTION
2008         if (need_unsorted_flist) {
2009                 if (inc_recurse) {
2010                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2011                                 out_of_memory("send_file_list");
2012                         memcpy(flist->sorted, flist->files,
2013                                flist->used * sizeof (struct file_struct*));
2014                         clean_flist(flist, 0);
2015                 } else {
2016                         flist->sorted = flist->files;
2017                         flist->low = 0;
2018                         flist->high = flist->used - 1;
2019                 }
2020         } else
2021 #endif
2022         {
2023                 flist->sorted = flist->files;
2024                 clean_flist(flist, 0);
2025         }
2026         file_total += flist->used;
2027
2028         /* We don't subtract dir_count for the first send since we
2029          * might have one or more dot dirs which need to get sent. */
2030         flist->ndx_end = flist->ndx_start + flist->used - 1;
2031
2032         if (!numeric_ids && !inc_recurse)
2033                 send_id_list(f);
2034
2035         /* send the io_error flag */
2036         if (protocol_version < 30)
2037                 write_int(f, ignore_errors ? 0 : io_error);
2038         else if (io_error && !ignore_errors)
2039                 send_msg_int(MSG_IO_ERROR, io_error);
2040
2041         if (disable_buffering)
2042                 io_end_buffering_out();
2043
2044         stats.flist_size = stats.total_written - start_write;
2045         stats.num_files = flist->used;
2046
2047         if (verbose > 3)
2048                 output_flist(flist);
2049
2050         if (verbose > 2)
2051                 rprintf(FINFO, "send_file_list done\n");
2052
2053         if (inc_recurse) {
2054                 add_dirs_to_tree(-1, flist, dir_count);
2055                 flist_done_allocating(flist);
2056                 if (send_dir_ndx < 0) {
2057                         write_ndx(f, NDX_FLIST_EOF);
2058                         flist_eof = 1;
2059                 }
2060                 else if (file_total == 1) {
2061                         /* If we're creating incremental file-lists and there
2062                          * was just 1 item in the first file-list, send 1 more
2063                          * file-list to check if this is a 1-file xfer. */
2064                         send_extra_file_list(f, 1);
2065                 }
2066         }
2067
2068         return flist;
2069 }
2070
2071 struct file_list *recv_file_list(int f)
2072 {
2073         struct file_list *flist;
2074         int dstart, flags;
2075         int64 start_read;
2076
2077         if (!first_flist)
2078                 rprintf(FLOG, "receiving file list\n");
2079         if (show_filelist_p())
2080                 start_filelist_progress("receiving file list");
2081         else if (inc_recurse && verbose && !am_server && !first_flist)
2082                 rprintf(FCLIENT, "receiving incremental file list\n");
2083
2084         start_read = stats.total_read;
2085
2086 #ifdef SUPPORT_HARD_LINKS
2087         if (preserve_hard_links && !first_flist)
2088                 init_hard_links();
2089 #endif
2090
2091         flist = flist_new(0, "recv_file_list");
2092
2093         if (inc_recurse) {
2094                 if (flist->ndx_start == 0)
2095                         dir_flist = flist_new(FLIST_TEMP, "recv_file_list");
2096                 dstart = dir_flist->used;
2097         } else {
2098                 dir_flist = flist;
2099                 dstart = 0;
2100         }
2101
2102         while ((flags = read_byte(f)) != 0) {
2103                 struct file_struct *file;
2104
2105                 flist_expand(flist, 1);
2106
2107                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
2108                         flags |= read_byte(f) << 8;
2109                 file = recv_file_entry(flist, flags, f);
2110
2111                 if (inc_recurse && S_ISDIR(file->mode)) {
2112                         flist_expand(dir_flist, 1);
2113                         dir_flist->files[dir_flist->used++] = file;
2114                 }
2115
2116                 flist->files[flist->used++] = file;
2117
2118                 maybe_emit_filelist_progress(flist->used);
2119
2120                 if (verbose > 2) {
2121                         rprintf(FINFO, "recv_file_name(%s)\n",
2122                                 f_name(file, NULL));
2123                 }
2124         }
2125         file_total += flist->used;
2126
2127         flist->ndx_end = flist->ndx_start + flist->used - 1;
2128         if (inc_recurse && flist->ndx_start)
2129                 flist->ndx_end -= dir_flist->used - dstart;
2130
2131         if (verbose > 2)
2132                 rprintf(FINFO, "received %d names\n", flist->used);
2133
2134         if (show_filelist_p())
2135                 finish_filelist_progress(flist);
2136
2137 #ifdef ICONV_OPTION
2138         if (need_unsorted_flist) {
2139                 /* Create an extra array of index pointers that we can sort for
2140                  * the generator's use (for wading through the files in sorted
2141                  * order and for calling flist_find()).  We keep the "files"
2142                  * list unsorted for our exchange of index numbers with the
2143                  * other side (since their names may not sort the same). */
2144                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2145                         out_of_memory("recv_file_list");
2146                 memcpy(flist->sorted, flist->files,
2147                        flist->used * sizeof (struct file_struct*));
2148                 if (inc_recurse && dir_flist->used > dstart) {
2149                         dir_flist->sorted = realloc_array(dir_flist->sorted,
2150                                                 struct file_struct *,
2151                                                 dir_flist->used);
2152                         memcpy(dir_flist->sorted + dstart, dir_flist->files + dstart,
2153                                (dir_flist->used - dstart) * sizeof (struct file_struct*));
2154                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2155                 }
2156         } else
2157 #endif
2158         {
2159                 flist->sorted = flist->files;
2160                 if (inc_recurse && dir_flist->used > dstart) {
2161                         dir_flist->sorted = dir_flist->files;
2162                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2163                 }
2164         }
2165
2166         if (inc_recurse)
2167                 flist_done_allocating(flist);
2168         else if (f >= 0)
2169                 recv_id_list(f, flist);
2170
2171         clean_flist(flist, relative_paths);
2172
2173         if (protocol_version < 30) {
2174                 /* Recv the io_error flag */
2175                 if (ignore_errors)
2176                         read_int(f);
2177                 else
2178                         io_error |= read_int(f);
2179         }
2180
2181         if (verbose > 3)
2182                 output_flist(flist);
2183
2184         if (verbose > 2)
2185                 rprintf(FINFO, "recv_file_list done\n");
2186
2187         stats.flist_size += stats.total_read - start_read;
2188         stats.num_files += flist->used;
2189
2190         return flist;
2191 }
2192
2193 /* This is only used once by the receiver if the very first file-list
2194  * has exactly one item in it. */
2195 void recv_additional_file_list(int f)
2196 {
2197         struct file_list *flist;
2198         int ndx = read_ndx(f);
2199         if (ndx == NDX_FLIST_EOF) {
2200                 flist_eof = 1;
2201                 change_local_filter_dir(NULL, 0, 0);
2202         } else {
2203                 ndx = NDX_FLIST_OFFSET - ndx;
2204                 if (ndx < 0 || ndx >= dir_flist->used) {
2205                         ndx = NDX_FLIST_OFFSET - ndx;
2206                         rprintf(FERROR,
2207                                 "[%s] Invalid dir index: %d (%d - %d)\n",
2208                                 who_am_i(), ndx, NDX_FLIST_OFFSET,
2209                                 NDX_FLIST_OFFSET - dir_flist->used + 1);
2210                         exit_cleanup(RERR_PROTOCOL);
2211                 }
2212                 if (verbose > 3) {
2213                         rprintf(FINFO, "[%s] receiving flist for dir %d\n",
2214                                 who_am_i(), ndx);
2215                 }
2216                 flist = recv_file_list(f);
2217                 flist->parent_ndx = ndx;
2218         }
2219 }
2220
2221 /* Search for an identically-named item in the file list.  Note that the
2222  * items must agree in their directory-ness, or no match is returned. */
2223 int flist_find(struct file_list *flist, struct file_struct *f)
2224 {
2225         int low = flist->low, high = flist->high;
2226         int diff, mid, mid_up;
2227
2228         while (low <= high) {
2229                 mid = (low + high) / 2;
2230                 if (F_IS_ACTIVE(flist->sorted[mid]))
2231                         mid_up = mid;
2232                 else {
2233                         /* Scan for the next non-empty entry using the cached
2234                          * distance values.  If the value isn't fully up-to-
2235                          * date, update it. */
2236                         mid_up = mid + F_DEPTH(flist->sorted[mid]);
2237                         if (!F_IS_ACTIVE(flist->sorted[mid_up])) {
2238                                 do {
2239                                     mid_up += F_DEPTH(flist->sorted[mid_up]);
2240                                 } while (!F_IS_ACTIVE(flist->sorted[mid_up]));
2241                                 F_DEPTH(flist->sorted[mid]) = mid_up - mid;
2242                         }
2243                         if (mid_up > high) {
2244                                 /* If there's nothing left above us, set high to
2245                                  * a non-empty entry below us and continue. */
2246                                 high = mid - (int)flist->sorted[mid]->len32;
2247                                 if (!F_IS_ACTIVE(flist->sorted[high])) {
2248                                         do {
2249                                             high -= (int)flist->sorted[high]->len32;
2250                                         } while (!F_IS_ACTIVE(flist->sorted[high]));
2251                                         flist->sorted[mid]->len32 = mid - high;
2252                                 }
2253                                 continue;
2254                         }
2255                 }
2256                 diff = f_name_cmp(flist->sorted[mid_up], f);
2257                 if (diff == 0) {
2258                         if (protocol_version < 29
2259                             && S_ISDIR(flist->sorted[mid_up]->mode)
2260                             != S_ISDIR(f->mode))
2261                                 return -1;
2262                         return mid_up;
2263                 }
2264                 if (diff < 0)
2265                         low = mid_up + 1;
2266                 else
2267                         high = mid - 1;
2268         }
2269         return -1;
2270 }
2271
2272 /*
2273  * Free up any resources a file_struct has allocated
2274  * and clear the file.
2275  */
2276 void clear_file(struct file_struct *file)
2277 {
2278         /* The +1 zeros out the first char of the basename. */
2279         memset(file, 0, FILE_STRUCT_LEN + 1);
2280         /* In an empty entry, F_DEPTH() is an offset to the next non-empty
2281          * entry.  Likewise for len32 in the opposite direction.  We assume
2282          * that we're alone for now since flist_find() will adjust the counts
2283          * it runs into that aren't up-to-date. */
2284         file->len32 = F_DEPTH(file) = 1;
2285 }
2286
2287 /* Allocate a new file list. */
2288 struct file_list *flist_new(int flags, char *msg)
2289 {
2290         struct file_list *flist;
2291
2292         if (!(flist = new0(struct file_list)))
2293                 out_of_memory(msg);
2294
2295         if (flags & FLIST_TEMP) {
2296                 if (!(flist->file_pool = pool_create(SMALL_EXTENT, 0,
2297                                                 out_of_memory, POOL_INTERN)))
2298                         out_of_memory(msg);
2299         } else {
2300                 /* This is a doubly linked list with prev looping back to
2301                  * the end of the list, but the last next pointer is NULL. */
2302                 if (!first_flist) {
2303                         flist->file_pool = pool_create(NORMAL_EXTENT, 0,
2304                                                 out_of_memory, POOL_INTERN);
2305                         if (!flist->file_pool)
2306                                 out_of_memory(msg);
2307
2308                         first_flist = cur_flist = flist->prev = flist;
2309                 } else {
2310                         flist->file_pool = first_flist->file_pool;
2311
2312                         flist->ndx_start = first_flist->prev->ndx_end + 2;
2313                         if (flist->ndx_start <= high_hlink_ndx)
2314                                 flist->ndx_start = high_hlink_ndx + 1;
2315
2316                         flist->prev = first_flist->prev;
2317                         flist->prev->next = first_flist->prev = flist;
2318                 }
2319                 flist->pool_boundary = pool_boundary(flist->file_pool, 0);
2320                 flist_cnt++;
2321         }
2322
2323         return flist;
2324 }
2325
2326 /* Free up all elements in a flist. */
2327 void flist_free(struct file_list *flist)
2328 {
2329         if (!flist->prev) {
2330                 /* Was FLIST_TEMP dir-list. */
2331         } else if (flist == flist->prev) {
2332                 first_flist = cur_flist = NULL;
2333                 file_total = 0;
2334                 flist_cnt = 0;
2335         } else {
2336                 if (flist == cur_flist)
2337                         cur_flist = flist->next;
2338                 if (flist == first_flist)
2339                         first_flist = first_flist->next;
2340                 else {
2341                         flist->prev->next = flist->next;
2342                         if (!flist->next)
2343                                 flist->next = first_flist;
2344                 }
2345                 flist->next->prev = flist->prev;
2346                 file_total -= flist->used;
2347                 flist_cnt--;
2348         }
2349
2350         if (!flist->prev || !flist_cnt)
2351                 pool_destroy(flist->file_pool);
2352         else
2353                 pool_free_old(flist->file_pool, flist->pool_boundary);
2354
2355         if (flist->sorted && flist->sorted != flist->files)
2356                 free(flist->sorted);
2357         free(flist->files);
2358         free(flist);
2359 }
2360
2361 /* This routine ensures we don't have any duplicate names in our file list.
2362  * duplicate names can cause corruption because of the pipelining. */
2363 static void clean_flist(struct file_list *flist, int strip_root)
2364 {
2365         char fbuf[MAXPATHLEN];
2366         int i, prev_i;
2367
2368         if (!flist)
2369                 return;
2370         if (flist->used == 0) {
2371                 flist->high = -1;
2372                 flist->low = 0;
2373                 return;
2374         }
2375
2376         fsort(flist->sorted, flist->used);
2377
2378         if (!am_sender || inc_recurse) {
2379                 for (i = prev_i = 0; i < flist->used; i++) {
2380                         if (F_IS_ACTIVE(flist->sorted[i])) {
2381                                 prev_i = i;
2382                                 break;
2383                         }
2384                 }
2385                 flist->low = prev_i;
2386         } else {
2387                 i = prev_i = flist->used - 1;
2388                 flist->low = 0;
2389         }
2390
2391         while (++i < flist->used) {
2392                 int j;
2393                 struct file_struct *file = flist->sorted[i];
2394
2395                 if (!F_IS_ACTIVE(file))
2396                         continue;
2397                 if (f_name_cmp(file, flist->sorted[prev_i]) == 0)
2398                         j = prev_i;
2399                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
2400                         int save_mode = file->mode;
2401                         /* Make sure that this directory doesn't duplicate a
2402                          * non-directory earlier in the list. */
2403                         flist->high = prev_i;
2404                         file->mode = S_IFREG;
2405                         j = flist_find(flist, file);
2406                         file->mode = save_mode;
2407                 } else
2408                         j = -1;
2409                 if (j >= 0) {
2410                         int keep, drop;
2411                         /* If one is a dir and the other is not, we want to
2412                          * keep the dir because it might have contents in the
2413                          * list.  Otherwise keep the first one. */
2414                         if (S_ISDIR(file->mode)) {
2415                                 struct file_struct *fp = flist->sorted[j];
2416                                 if (!S_ISDIR(fp->mode))
2417                                         keep = i, drop = j;
2418                                 else {
2419                                         if (am_sender)
2420                                                 file->flags |= FLAG_DUPLICATE;
2421                                         else { /* Make sure we merge our vital flags. */
2422                                                 fp->flags |= file->flags & (FLAG_TOP_DIR|FLAG_CONTENT_DIR);
2423                                                 fp->flags &= file->flags | ~FLAG_IMPLIED_DIR;
2424                                         }
2425                                         keep = j, drop = i;
2426                                 }
2427                         } else
2428                                 keep = j, drop = i;
2429
2430                         if (!am_sender) {
2431                                 if (verbose > 1) {
2432                                         rprintf(FINFO,
2433                                             "removing duplicate name %s from file list (%d)\n",
2434                                             f_name(file, fbuf), drop + flist->ndx_start);
2435                                 }
2436                                 clear_file(flist->sorted[drop]);
2437                         }
2438
2439                         if (keep == i) {
2440                                 if (flist->low == drop) {
2441                                         for (j = drop + 1;
2442                                              j < i && !F_IS_ACTIVE(flist->sorted[j]);
2443                                              j++) {}
2444                                         flist->low = j;
2445                                 }
2446                                 prev_i = i;
2447                         }
2448                 } else
2449                         prev_i = i;
2450         }
2451         flist->high = prev_i;
2452
2453         if (strip_root) {
2454                 /* We need to strip off the leading slashes for relative
2455                  * paths, but this must be done _after_ the sorting phase. */
2456                 for (i = flist->low; i <= flist->high; i++) {
2457                         struct file_struct *file = flist->sorted[i];
2458
2459                         if (!file->dirname)
2460                                 continue;
2461                         while (*file->dirname == '/')
2462                                 file->dirname++;
2463                         if (!*file->dirname)
2464                                 file->dirname = NULL;
2465                 }
2466         }
2467
2468         if (prune_empty_dirs && !am_sender) {
2469                 int j, prev_depth = 0;
2470
2471                 prev_i = 0; /* It's OK that this isn't really true. */
2472
2473                 for (i = flist->low; i <= flist->high; i++) {
2474                         struct file_struct *fp, *file = flist->sorted[i];
2475
2476                         /* This temporarily abuses the F_DEPTH() value for a
2477                          * directory that is in a chain that might get pruned.
2478                          * We restore the old value if it gets a reprieve. */
2479                         if (S_ISDIR(file->mode) && F_DEPTH(file)) {
2480                                 /* Dump empty dirs when coming back down. */
2481                                 for (j = prev_depth; j >= F_DEPTH(file); j--) {
2482                                         fp = flist->sorted[prev_i];
2483                                         if (F_DEPTH(fp) >= 0)
2484                                                 break;
2485                                         prev_i = -F_DEPTH(fp)-1;
2486                                         clear_file(fp);
2487                                 }
2488                                 prev_depth = F_DEPTH(file);
2489                                 if (is_excluded(f_name(file, fbuf), 1,
2490                                                        ALL_FILTERS)) {
2491                                         /* Keep dirs through this dir. */
2492                                         for (j = prev_depth-1; ; 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                                 } else
2500                                         F_DEPTH(file) = -prev_i-1;
2501                                 prev_i = i;
2502                         } else {
2503                                 /* Keep dirs through this non-dir. */
2504                                 for (j = prev_depth; ; j--) {
2505                                         fp = flist->sorted[prev_i];
2506                                         if (F_DEPTH(fp) >= 0)
2507                                                 break;
2508                                         prev_i = -F_DEPTH(fp)-1;
2509                                         F_DEPTH(fp) = j;
2510                                 }
2511                         }
2512                 }
2513                 /* Dump all remaining empty dirs. */
2514                 while (1) {
2515                         struct file_struct *fp = flist->sorted[prev_i];
2516                         if (F_DEPTH(fp) >= 0)
2517                                 break;
2518                         prev_i = -F_DEPTH(fp)-1;
2519                         clear_file(fp);
2520                 }
2521
2522                 for (i = flist->low; i <= flist->high; i++) {
2523                         if (F_IS_ACTIVE(flist->sorted[i]))
2524                                 break;
2525                 }
2526                 flist->low = i;
2527                 for (i = flist->high; i >= flist->low; i--) {
2528                         if (F_IS_ACTIVE(flist->sorted[i]))
2529                                 break;
2530                 }
2531                 flist->high = i;
2532         }
2533 }
2534
2535 static void output_flist(struct file_list *flist)
2536 {
2537         char uidbuf[16], gidbuf[16], depthbuf[16];
2538         struct file_struct *file;
2539         const char *root, *dir, *slash, *name, *trail;
2540         const char *who = who_am_i();
2541         int i;
2542
2543         rprintf(FINFO, "[%s] flist start=%d, end=%d, used=%d, low=%d, high=%d\n",
2544                 who, flist->ndx_start, flist->ndx_end, flist->used, flist->low, flist->high);
2545         for (i = 0; i < flist->used; i++) {
2546                 file = flist->sorted[i];
2547                 if ((am_root || am_sender) && uid_ndx) {
2548                         snprintf(uidbuf, sizeof uidbuf, " uid=%u",
2549                                  F_OWNER(file));
2550                 } else
2551                         *uidbuf = '\0';
2552                 if (gid_ndx) {
2553                         static char parens[] = "(\0)\0\0\0";
2554                         char *pp = parens + (file->flags & FLAG_SKIP_GROUP ? 0 : 3);
2555                         snprintf(gidbuf, sizeof gidbuf, " gid=%s%u%s",
2556                                  pp, F_GROUP(file), pp + 2);
2557                 } else
2558                         *gidbuf = '\0';
2559                 if (!am_sender)
2560                         snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file));
2561                 if (F_IS_ACTIVE(file)) {
2562                         root = am_sender ? NS(F_PATHNAME(file)) : depthbuf;
2563                         if ((dir = file->dirname) == NULL)
2564                                 dir = slash = "";
2565                         else
2566                                 slash = "/";
2567                         name = file->basename;
2568                         trail = S_ISDIR(file->mode) ? "/" : "";
2569                 } else
2570                         root = dir = slash = name = trail = "";
2571                 rprintf(FINFO,
2572                         "[%s] i=%d %s %s%s%s%s mode=0%o len=%.0f%s%s flags=%x\n",
2573                         who, i + flist->ndx_start,
2574                         root, dir, slash, name, trail,
2575                         (int)file->mode, (double)F_LENGTH(file),
2576                         uidbuf, gidbuf, file->flags);
2577         }
2578 }
2579
2580 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
2581 enum fnc_type { t_PATH, t_ITEM };
2582
2583 static int found_prefix;
2584
2585 /* Compare the names of two file_struct entities, similar to how strcmp()
2586  * would do if it were operating on the joined strings.
2587  *
2588  * Some differences beginning with protocol_version 29: (1) directory names
2589  * are compared with an assumed trailing slash so that they compare in a
2590  * way that would cause them to sort immediately prior to any content they
2591  * may have; (2) a directory of any name compares after a non-directory of
2592  * any name at the same depth; (3) a directory with name "." compares prior
2593  * to anything else.  These changes mean that a directory and a non-dir
2594  * with the same name will not compare as equal (protocol_version >= 29).
2595  *
2596  * The dirname component can be an empty string, but the basename component
2597  * cannot (and never is in the current codebase).  The basename component
2598  * may be NULL (for a removed item), in which case it is considered to be
2599  * after any existing item. */
2600 int f_name_cmp(const struct file_struct *f1, const struct file_struct *f2)
2601 {
2602         int dif;
2603         const uchar *c1, *c2;
2604         enum fnc_state state1, state2;
2605         enum fnc_type type1, type2;
2606         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
2607
2608         if (!f1 || !F_IS_ACTIVE(f1)) {
2609                 if (!f2 || !F_IS_ACTIVE(f2))
2610                         return 0;
2611                 return -1;
2612         }
2613         if (!f2 || !F_IS_ACTIVE(f2))
2614                 return 1;
2615
2616         c1 = (uchar*)f1->dirname;
2617         c2 = (uchar*)f2->dirname;
2618         if (c1 == c2)
2619                 c1 = c2 = NULL;
2620         if (!c1) {
2621                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2622                 c1 = (const uchar*)f1->basename;
2623                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2624                         type1 = t_ITEM;
2625                         state1 = s_TRAILING;
2626                         c1 = (uchar*)"";
2627                 } else
2628                         state1 = s_BASE;
2629         } else {
2630                 type1 = t_path;
2631                 state1 = s_DIR;
2632         }
2633         if (!c2) {
2634                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2635                 c2 = (const uchar*)f2->basename;
2636                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2637                         type2 = t_ITEM;
2638                         state2 = s_TRAILING;
2639                         c2 = (uchar*)"";
2640                 } else
2641                         state2 = s_BASE;
2642         } else {
2643                 type2 = t_path;
2644                 state2 = s_DIR;
2645         }
2646
2647         if (type1 != type2)
2648                 return type1 == t_PATH ? 1 : -1;
2649
2650         do {
2651                 if (!*c1) {
2652                         switch (state1) {
2653                         case s_DIR:
2654                                 state1 = s_SLASH;
2655                                 c1 = (uchar*)"/";
2656                                 break;
2657                         case s_SLASH:
2658                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2659                                 c1 = (const uchar*)f1->basename;
2660                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2661                                         type1 = t_ITEM;
2662                                         state1 = s_TRAILING;
2663                                         c1 = (uchar*)"";
2664                                 } else
2665                                         state1 = s_BASE;
2666                                 break;
2667                         case s_BASE:
2668                                 state1 = s_TRAILING;
2669                                 if (type1 == t_PATH) {
2670                                         c1 = (uchar*)"/";
2671                                         break;
2672                                 }
2673                                 /* FALL THROUGH */
2674                         case s_TRAILING:
2675                                 type1 = t_ITEM;
2676                                 break;
2677                         }
2678                         if (*c2 && type1 != type2)
2679                                 return type1 == t_PATH ? 1 : -1;
2680                 }
2681                 if (!*c2) {
2682                         switch (state2) {
2683                         case s_DIR:
2684                                 state2 = s_SLASH;
2685                                 c2 = (uchar*)"/";
2686                                 break;
2687                         case s_SLASH:
2688                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2689                                 c2 = (const uchar*)f2->basename;
2690                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2691                                         type2 = t_ITEM;
2692                                         state2 = s_TRAILING;
2693                                         c2 = (uchar*)"";
2694                                 } else
2695                                         state2 = s_BASE;
2696                                 break;
2697                         case s_BASE:
2698                                 state2 = s_TRAILING;
2699                                 if (type2 == t_PATH) {
2700                                         c2 = (uchar*)"/";
2701                                         break;
2702                                 }
2703                                 /* FALL THROUGH */
2704                         case s_TRAILING:
2705                                 found_prefix = 1;
2706                                 if (!*c1)
2707                                         return 0;
2708                                 type2 = t_ITEM;
2709                                 break;
2710                         }
2711                         if (type1 != type2)
2712                                 return type1 == t_PATH ? 1 : -1;
2713                 }
2714         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
2715
2716         return dif;
2717 }
2718
2719 /* Returns 1 if f1's filename has all of f2's filename as a prefix.  This does
2720  * not match if f2's basename is not an exact match of a path element in f1.
2721  * E.g. /path/foo is not a prefix of /path/foobar/baz, but /path/foobar is. */
2722 int f_name_has_prefix(const struct file_struct *f1, const struct file_struct *f2)
2723 {
2724         found_prefix = 0;
2725         f_name_cmp(f1, f2);
2726         return found_prefix;
2727 }
2728
2729 char *f_name_buf(void)
2730 {
2731         static char names[5][MAXPATHLEN];
2732         static unsigned int n;
2733
2734         n = (n + 1) % (sizeof names / sizeof names[0]);
2735
2736         return names[n];
2737 }
2738
2739 /* Return a copy of the full filename of a flist entry, using the indicated
2740  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
2741  * done because we checked the size when creating the file_struct entry.
2742  */
2743 char *f_name(const struct file_struct *f, char *fbuf)
2744 {
2745         if (!f || !F_IS_ACTIVE(f))
2746                 return NULL;
2747
2748         if (!fbuf)
2749                 fbuf = f_name_buf();
2750
2751         if (f->dirname) {
2752                 int len = strlen(f->dirname);
2753                 memcpy(fbuf, f->dirname, len);
2754                 fbuf[len] = '/';
2755                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
2756         } else
2757                 strlcpy(fbuf, f->basename, MAXPATHLEN);
2758
2759         return fbuf;
2760 }
2761
2762 /* Do a non-recursive scan of the named directory, possibly ignoring all
2763  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
2764  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
2765  * buffer (the functions we call will append names onto the end, but the old
2766  * dir value will be restored on exit). */
2767 struct file_list *get_dirlist(char *dirname, int dlen, int ignore_filter_rules)
2768 {
2769         struct file_list *dirlist;
2770         char dirbuf[MAXPATHLEN];
2771         int save_recurse = recurse;
2772         int save_xfer_dirs = xfer_dirs;
2773         int save_prune_empty_dirs = prune_empty_dirs;
2774
2775         if (dlen < 0) {
2776                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
2777                 if (dlen >= MAXPATHLEN)
2778                         return NULL;
2779                 dirname = dirbuf;
2780         }
2781
2782         dirlist = flist_new(FLIST_TEMP, "get_dirlist");
2783
2784         recurse = 0;
2785         xfer_dirs = 1;
2786         send_directory(ignore_filter_rules ? -2 : -1, dirlist, dirname, dlen, 0);
2787         xfer_dirs = save_xfer_dirs;
2788         recurse = save_recurse;
2789         if (do_progress)
2790                 flist_count_offset += dirlist->used;
2791
2792         prune_empty_dirs = 0;
2793         dirlist->sorted = dirlist->files;
2794         clean_flist(dirlist, 0);
2795         prune_empty_dirs = save_prune_empty_dirs;
2796
2797         if (verbose > 3)
2798                 output_flist(dirlist);
2799
2800         return dirlist;
2801 }