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 version 3 as
  11  * published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, visit the http://fsf.org website.
  20  */
  21
  22 #include "rsync.h"
  23 #include "rounding.h"
  24 #include "io.h"
  25
  26 extern int verbose;
  27 extern int list_only;
  28 extern int am_root;
  29 extern int am_server;
  30 extern int am_daemon;
  31 extern int am_sender;
  32 extern int am_generator;
  33 extern int inc_recurse;
  34 extern int do_progress;
  35 extern int always_checksum;
  36 extern int module_id;
  37 extern int ignore_errors;
  38 extern int numeric_ids;
  39 extern int recurse;
  40 extern int use_qsort;
  41 extern int xfer_dirs;
  42 extern int filesfrom_fd;
  43 extern int one_file_system;
  44 extern int copy_dirlinks;
  45 extern int keep_dirlinks;
  46 extern int preserve_acls;
  47 extern int preserve_xattrs;
  48 extern int preserve_links;
  49 extern int preserve_hard_links;
  50 extern int preserve_devices;
  51 extern int preserve_specials;
  52 extern int uid_ndx;
  53 extern int gid_ndx;
  54 extern int relative_paths;
  55 extern int implied_dirs;
  56 extern int file_extra_cnt;
  57 extern int ignore_perishable;
  58 extern int non_perishable_cnt;
  59 extern int prune_empty_dirs;
  60 extern int copy_links;
  61 extern int copy_unsafe_links;
  62 extern int protocol_version;
  63 extern int sanitize_paths;
  64 extern struct stats stats;
  65
  66 extern char curr_dir[MAXPATHLEN];
  67
  68 extern struct chmod_mode_struct *chmod_modes;
  69
  70 extern struct filter_list_struct filter_list;
  71 extern struct filter_list_struct server_filter_list;
  72
  73 #ifdef ICONV_OPTION
  74 extern int ic_ndx;
  75 extern int need_unsorted_flist;
  76 extern iconv_t ic_send, ic_recv;
  77 #endif
  78
  79 #define PTR_SIZE (sizeof (struct file_struct *))
  80
  81 int io_error;
  82 int checksum_len;
  83 dev_t filesystem_dev; /* used to implement -x */
  84
  85 struct file_list *cur_flist, *first_flist, *dir_flist;
  86 int send_dir_ndx = -1, send_dir_depth = 0;
  87 int flist_cnt = 0; /* how many (non-tmp) file list objects exist */
  88 int file_total = 0; /* total of all active items over all file-lists */
  89 int flist_eof = 0; /* all the file-lists are now known */
  90
  91 /* The tmp_* vars are used as a cache area by make_file() to store data
  92  * that the sender doesn't need to remember in its file list.  The data
  93  * will survive just long enough to be used by send_file_entry(). */
  94 static dev_t tmp_rdev;
  95 #ifdef SUPPORT_HARD_LINKS
  96 static int64 tmp_dev, tmp_ino;
  97 #endif
  98 static char tmp_sum[MAX_DIGEST_LEN];
  99
 100 static char empty_sum[MAX_DIGEST_LEN];
 101 static int flist_count_offset; /* for --delete --progress */
 102 static int dir_count = 0;
 103
 104 static void clean_flist(struct file_list *flist, int strip_root);
 105 static void output_flist(struct file_list *flist);
 106
 107 void init_flist(void)
 108 {
 109         if (verbose > 4) {
 110                 rprintf(FINFO, "FILE_STRUCT_LEN=%d, EXTRA_LEN=%d\n",
 111                         (int)FILE_STRUCT_LEN, (int)EXTRA_LEN);
 112         }
 113         checksum_len = protocol_version < 21 ? 2
 114                      : protocol_version < 30 ? MD4_DIGEST_LEN
 115                      : MD5_DIGEST_LEN;
 116 }
 117
 118 static int show_filelist_p(void)
 119 {
 120         return verbose && xfer_dirs && !am_server && !inc_recurse;
 121 }
 122
 123 static void start_filelist_progress(char *kind)
 124 {
 125         rprintf(FCLIENT, "%s ... ", kind);
 126         if (verbose > 1 || do_progress)
 127                 rprintf(FCLIENT, "\n");
 128         rflush(FINFO);
 129 }
 130
 131 static void emit_filelist_progress(int count)
 132 {
 133         rprintf(FCLIENT, " %d files...\r", count);
 134 }
 135
 136 static void maybe_emit_filelist_progress(int count)
 137 {
 138         if (do_progress && show_filelist_p() && (count % 100) == 0)
 139                 emit_filelist_progress(count);
 140 }
 141
 142 static void finish_filelist_progress(const struct file_list *flist)
 143 {
 144         if (do_progress) {
 145                 /* This overwrites the progress line */
 146                 rprintf(FINFO, "%d file%sto consider\n",
 147                         flist->used, flist->used == 1 ? " " : "s ");
 148         } else
 149                 rprintf(FINFO, "done\n");
 150 }
 151
 152 void show_flist_stats(void)
 153 {
 154         /* Nothing yet */
 155 }
 156
 157 static void list_file_entry(struct file_struct *f)
 158 {
 159         char permbuf[PERMSTRING_SIZE];
 160         double len;
 161
 162         if (!F_IS_ACTIVE(f)) {
 163                 /* this can happen if duplicate names were removed */
 164                 return;
 165         }
 166
 167         permstring(permbuf, f->mode);
 168         len = F_LENGTH(f);
 169
 170         /* TODO: indicate '+' if the entry has an ACL. */
 171
 172 #ifdef SUPPORT_LINKS
 173         if (preserve_links && S_ISLNK(f->mode)) {
 174                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
 175                         permbuf, len, timestring(f->modtime),
 176                         f_name(f, NULL), F_SYMLINK(f));
 177         } else
 178 #endif
 179         {
 180                 rprintf(FINFO, "%s %11.0f %s %s\n",
 181                         permbuf, len, timestring(f->modtime),
 182                         f_name(f, NULL));
 183         }
 184 }
 185
 186 /* Stat either a symlink or its referent, depending on the settings of
 187  * copy_links, copy_unsafe_links, etc.  Returns -1 on error, 0 on success.
 188  *
 189  * If path is the name of a symlink, then the linkbuf buffer (which must hold
 190  * MAXPATHLEN chars) will be set to the symlink's target string.
 191  *
 192  * The stat structure pointed to by stp will contain information about the
 193  * link or the referent as appropriate, if they exist. */
 194 static int readlink_stat(const char *path, STRUCT_STAT *stp, char *linkbuf)
 195 {
 196 #ifdef SUPPORT_LINKS
 197         if (link_stat(path, stp, copy_dirlinks) < 0)
 198                 return -1;
 199         if (S_ISLNK(stp->st_mode)) {
 200                 int llen = readlink(path, linkbuf, MAXPATHLEN - 1);
 201                 if (llen < 0)
 202                         return -1;
 203                 linkbuf[llen] = '\0';
 204                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 205                         if (verbose > 1) {
 206                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 207                                         path, linkbuf);
 208                         }
 209                         return x_stat(path, stp, NULL);
 210                 }
 211         }
 212         return 0;
 213 #else
 214         return x_stat(path, stp, NULL);
 215 #endif
 216 }
 217
 218 int link_stat(const char *path, STRUCT_STAT *stp, int follow_dirlinks)
 219 {
 220 #ifdef SUPPORT_LINKS
 221         if (copy_links)
 222                 return x_stat(path, stp, NULL);
 223         if (x_lstat(path, stp, NULL) < 0)
 224                 return -1;
 225         if (follow_dirlinks && S_ISLNK(stp->st_mode)) {
 226                 STRUCT_STAT st;
 227                 if (x_stat(path, &st, NULL) == 0 && S_ISDIR(st.st_mode))
 228                         *stp = st;
 229         }
 230         return 0;
 231 #else
 232         return x_stat(path, stp, NULL);
 233 #endif
 234 }
 235
 236 /* This function is used to check if a file should be included/excluded
 237  * from the list of files based on its name and type etc.  The value of
 238  * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
 239 static int is_excluded(char *fname, int is_dir, int filter_level)
 240 {
 241 #if 0 /* This currently never happens, so avoid a useless compare. */
 242         if (filter_level == NO_FILTERS)
 243                 return 0;
 244 #endif
 245         if (fname) {
 246                 /* never exclude '.', even if somebody does --exclude '*' */
 247                 if (fname[0] == '.' && !fname[1])
 248                         return 0;
 249                 /* Handle the -R version of the '.' dir. */
 250                 if (fname[0] == '/') {
 251                         int len = strlen(fname);
 252                         if (fname[len-1] == '.' && fname[len-2] == '/')
 253                                 return 0;
 254                 }
 255         }
 256         if (server_filter_list.head
 257             && check_filter(&server_filter_list, fname, is_dir) < 0)
 258                 return 1;
 259         if (filter_level != ALL_FILTERS)
 260                 return 0;
 261         if (filter_list.head
 262             && check_filter(&filter_list, fname, is_dir) < 0)
 263                 return 1;
 264         return 0;
 265 }
 266
 267 static void send_directory(int f, struct file_list *flist,
 268                            char *fbuf, int len, int flags);
 269
 270 static const char *pathname, *orig_dir;
 271 static int pathname_len;
 272
 273
 274 /* Make sure flist can hold at least flist->used + extra entries. */
 275 static void flist_expand(struct file_list *flist, int extra)
 276 {
 277         struct file_struct **new_ptr;
 278
 279         if (flist->used + extra <= flist->malloced)
 280                 return;
 281
 282         if (flist->malloced < FLIST_START)
 283                 flist->malloced = FLIST_START;
 284         else if (flist->malloced >= FLIST_LINEAR)
 285                 flist->malloced += FLIST_LINEAR;
 286         else
 287                 flist->malloced *= 2;
 288
 289         /* In case count jumped or we are starting the list
 290          * with a known size just set it. */
 291         if (flist->malloced < flist->used + extra)
 292                 flist->malloced = flist->used + extra;
 293
 294         new_ptr = realloc_array(flist->files, struct file_struct *,
 295                                 flist->malloced);
 296
 297         if (verbose >= 2 && flist->malloced != FLIST_START) {
 298                 rprintf(FCLIENT, "[%s] expand file_list to %.0f bytes, did%s move\n",
 299                     who_am_i(),
 300                     (double)sizeof flist->files[0] * flist->malloced,
 301                     (new_ptr == flist->files) ? " not" : "");
 302         }
 303
 304         flist->files = new_ptr;
 305
 306         if (!flist->files)
 307                 out_of_memory("flist_expand");
 308 }
 309
 310 static void flist_done_allocating(struct file_list *flist)
 311 {
 312         void *ptr = pool_boundary(flist->file_pool, 8*1024);
 313         if (flist->pool_boundary == ptr)
 314                 flist->pool_boundary = NULL; /* list didn't use any pool memory */
 315         else
 316                 flist->pool_boundary = ptr;
 317 }
 318
 319 int push_pathname(const char *dir, int len)
 320 {
 321         if (dir == pathname)
 322                 return 1;
 323
 324         if (!orig_dir)
 325                 orig_dir = strdup(curr_dir);
 326
 327         if (pathname && !pop_dir(orig_dir)) {
 328                 rsyserr(FERROR, errno, "pop_dir %s failed",
 329                         full_fname(orig_dir));
 330                 exit_cleanup(RERR_FILESELECT);
 331         }
 332
 333         if (dir && !push_dir(dir, 0)) {
 334                 io_error |= IOERR_GENERAL;
 335                 rsyserr(FERROR, errno, "push_dir %s failed in %s",
 336                         full_fname(dir), curr_dir);
 337                 return 0;
 338         }
 339
 340         pathname = dir;
 341         pathname_len = len >= 0 ? len : dir ? (int)strlen(dir) : 0;
 342
 343         return 1;
 344 }
 345
 346 static void send_file_entry(int f, struct file_struct *file, int ndx)
 347 {
 348         static time_t modtime;
 349         static mode_t mode;
 350         static int64 dev;
 351         static dev_t rdev;
 352         static uint32 rdev_major;
 353         static uid_t uid;
 354         static gid_t gid;
 355         static char *user_name, *group_name;
 356         static char lastname[MAXPATHLEN];
 357         char fname[MAXPATHLEN];
 358         int first_hlink_ndx = -1;
 359         int l1, l2;
 360         int flags;
 361
 362 #ifdef ICONV_OPTION
 363         if (ic_send != (iconv_t)-1) {
 364                 ICONV_CONST char *ibuf;
 365                 char *obuf = fname;
 366                 size_t ocnt = MAXPATHLEN, icnt;
 367
 368                 iconv(ic_send, NULL,0, NULL,0);
 369                 if ((ibuf = (ICONV_CONST char *)file->dirname) != NULL) {
 370                     icnt = strlen(ibuf);
 371                     ocnt--; /* pre-subtract the space for the '/' */
 372                     if (iconv(ic_send, &ibuf,&icnt, &obuf,&ocnt) == (size_t)-1)
 373                         goto convert_error;
 374                     *obuf++ = '/';
 375                 }
 376
 377                 ibuf = (ICONV_CONST char *)file->basename;
 378                 icnt = strlen(ibuf);
 379                 if (iconv(ic_send, &ibuf,&icnt, &obuf,&ocnt) == (size_t)-1) {
 380                   convert_error:
 381                         io_error |= IOERR_GENERAL;
 382                         rprintf(FINFO,
 383                             "[%s] cannot convert filename: %s (%s)\n",
 384                             who_am_i(), f_name(file, fname), strerror(errno));
 385                         return;
 386                 }
 387                 *obuf = '\0';
 388         } else
 389 #endif
 390                 f_name(file, fname);
 391
 392         flags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */
 393
 394         if (file->mode == mode)
 395                 flags |= XMIT_SAME_MODE;
 396         else
 397                 mode = file->mode;
 398         if ((preserve_devices && IS_DEVICE(mode))
 399          || (preserve_specials && IS_SPECIAL(mode))) {
 400                 if (protocol_version < 28) {
 401                         if (tmp_rdev == rdev)
 402                                 flags |= XMIT_SAME_RDEV_pre28;
 403                         else
 404                                 rdev = tmp_rdev;
 405                 } else {
 406                         rdev = tmp_rdev;
 407                         if ((uint32)major(rdev) == rdev_major)
 408                                 flags |= XMIT_SAME_RDEV_MAJOR;
 409                         else
 410                                 rdev_major = major(rdev);
 411                         if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu)
 412                                 flags |= XMIT_RDEV_MINOR_8_pre30;
 413                 }
 414         } else if (protocol_version < 28)
 415                 rdev = MAKEDEV(0, 0);
 416         if (uid_ndx) {
 417                 if ((uid_t)F_OWNER(file) == uid && *lastname)
 418                         flags |= XMIT_SAME_UID;
 419                 else {
 420                         uid = F_OWNER(file);
 421                         if (uid_ndx && !numeric_ids) {
 422                                 user_name = add_uid(uid);
 423                                 if (inc_recurse && user_name)
 424                                         flags |= XMIT_USER_NAME_FOLLOWS;
 425                         }
 426                 }
 427         }
 428         if (gid_ndx) {
 429                 if ((gid_t)F_GROUP(file) == gid && *lastname)
 430                         flags |= XMIT_SAME_GID;
 431                 else {
 432                         gid = F_GROUP(file);
 433                         if (gid_ndx && !numeric_ids) {
 434                                 group_name = add_gid(gid);
 435                                 if (inc_recurse && group_name)
 436                                         flags |= XMIT_GROUP_NAME_FOLLOWS;
 437                         }
 438                 }
 439         }
 440         if (file->modtime == modtime)
 441                 flags |= XMIT_SAME_TIME;
 442         else
 443                 modtime = file->modtime;
 444
 445 #ifdef SUPPORT_HARD_LINKS
 446         if (tmp_dev != 0) {
 447                 if (protocol_version >= 30) {
 448                         struct idev_node *np = idev_node(tmp_dev, tmp_ino);
 449                         first_hlink_ndx = (int32)(long)np->data - 1;
 450                         if (first_hlink_ndx < 0) {
 451                                 np->data = (void*)(long)(ndx + 1);
 452                                 flags |= XMIT_HLINK_FIRST;
 453                         }
 454                         flags |= XMIT_HLINKED;
 455                 } else {
 456                         if (tmp_dev == dev) {
 457                                 if (protocol_version >= 28)
 458                                         flags |= XMIT_SAME_DEV_pre30;
 459                         } else
 460                                 dev = tmp_dev;
 461                         flags |= 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                 flags |= XMIT_SAME_NAME;
 473         if (l2 > 255)
 474                 flags |= 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 (!flags && !S_ISDIR(mode))
 482                         flags |= XMIT_TOP_DIR;
 483                 if ((flags & 0xFF00) || !flags) {
 484                         flags |= XMIT_EXTENDED_FLAGS;
 485                         write_shortint(f, flags);
 486                 } else
 487                         write_byte(f, flags);
 488         } else {
 489                 if (!(flags & 0xFF))
 490                         flags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
 491                 write_byte(f, flags);
 492         }
 493         if (flags & XMIT_SAME_NAME)
 494                 write_byte(f, l1);
 495         if (flags & 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_varint30(f, first_hlink_ndx);
 503                 goto the_end;
 504         }
 505
 506         write_varlong30(f, F_LENGTH(file), 3);
 507         if (!(flags & XMIT_SAME_TIME)) {
 508                 if (protocol_version >= 30)
 509                         write_varlong(f, modtime, 4);
 510                 else
 511                         write_int(f, modtime);
 512         }
 513         if (!(flags & XMIT_SAME_MODE))
 514                 write_int(f, to_wire_mode(mode));
 515         if (uid_ndx && !(flags & XMIT_SAME_UID)) {
 516                 if (protocol_version < 30)
 517                         write_int(f, uid);
 518                 else {
 519                         write_varint(f, uid);
 520                         if (flags & XMIT_USER_NAME_FOLLOWS) {
 521                                 int len = strlen(user_name);
 522                                 write_byte(f, len);
 523                                 write_buf(f, user_name, len);
 524                         }
 525                 }
 526         }
 527         if (gid_ndx && !(flags & XMIT_SAME_GID)) {
 528                 if (protocol_version < 30)
 529                         write_int(f, gid);
 530                 else {
 531                         write_varint(f, gid);
 532                         if (flags & XMIT_GROUP_NAME_FOLLOWS) {
 533                                 int len = strlen(group_name);
 534                                 write_byte(f, len);
 535                                 write_buf(f, group_name, len);
 536                         }
 537                 }
 538         }
 539         if ((preserve_devices && IS_DEVICE(mode))
 540          || (preserve_specials && IS_SPECIAL(mode))) {
 541                 if (protocol_version < 28) {
 542                         if (!(flags & XMIT_SAME_RDEV_pre28))
 543                                 write_int(f, (int)rdev);
 544                 } else {
 545                         if (!(flags & XMIT_SAME_RDEV_MAJOR))
 546                                 write_varint30(f, major(rdev));
 547                         if (protocol_version >= 30)
 548                                 write_varint(f, minor(rdev));
 549                         else if (flags & XMIT_RDEV_MINOR_8_pre30)
 550                                 write_byte(f, minor(rdev));
 551                         else
 552                                 write_int(f, minor(rdev));
 553                 }
 554         }
 555
 556 #ifdef SUPPORT_LINKS
 557         if (preserve_links && S_ISLNK(mode)) {
 558                 const char *sl = F_SYMLINK(file);
 559                 int len = strlen(sl);
 560                 write_varint30(f, len);
 561                 write_buf(f, sl, len);
 562         }
 563 #endif
 564
 565 #ifdef SUPPORT_HARD_LINKS
 566         if (tmp_dev != 0 && protocol_version < 30) {
 567                 if (protocol_version < 26) {
 568                         /* 32-bit dev_t and ino_t */
 569                         write_int(f, (int32)dev);
 570                         write_int(f, (int32)tmp_ino);
 571                 } else {
 572                         /* 64-bit dev_t and ino_t */
 573                         if (!(flags & XMIT_SAME_DEV_pre30))
 574                                 write_longint(f, dev);
 575                         write_longint(f, tmp_ino);
 576                 }
 577         }
 578 #endif
 579
 580         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 581                 const char *sum;
 582                 if (S_ISREG(mode))
 583                         sum = tmp_sum;
 584                 else {
 585                         /* Prior to 28, we sent a useless set of nulls. */
 586                         sum = empty_sum;
 587                 }
 588                 write_buf(f, sum, checksum_len);
 589         }
 590
 591   the_end:
 592         strlcpy(lastname, fname, MAXPATHLEN);
 593
 594         if (S_ISREG(mode) || S_ISLNK(mode))
 595                 stats.total_size += F_LENGTH(file);
 596 }
 597
 598 static struct file_struct *recv_file_entry(struct file_list *flist,
 599                                            int xflags, int f)
 600 {
 601         static int64 modtime;
 602         static mode_t mode;
 603         static int64 dev;
 604         static dev_t rdev;
 605         static uint32 rdev_major;
 606         static uid_t uid;
 607         static gid_t gid;
 608         static uint16 gid_flags;
 609         static char lastname[MAXPATHLEN], *lastdir;
 610         static int lastdir_depth, lastdir_len = -1;
 611         static unsigned int del_hier_name_len = 0;
 612         static int in_del_hier = 0;
 613         char thisname[MAXPATHLEN];
 614         unsigned int l1 = 0, l2 = 0;
 615         int alloc_len, basename_len, linkname_len;
 616         int extra_len = file_extra_cnt * EXTRA_LEN;
 617         int first_hlink_ndx = -1;
 618         OFF_T file_length;
 619         const char *basename;
 620         struct file_struct *file;
 621         alloc_pool_t *pool;
 622         char *bp;
 623
 624         if (xflags & XMIT_SAME_NAME)
 625                 l1 = read_byte(f);
 626
 627         if (xflags & XMIT_LONG_NAME)
 628                 l2 = read_varint30(f);
 629         else
 630                 l2 = read_byte(f);
 631
 632         if (l2 >= MAXPATHLEN - l1) {
 633                 rprintf(FERROR,
 634                         "overflow: xflags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
 635                         xflags, l1, l2, lastname, who_am_i());
 636                 overflow_exit("recv_file_entry");
 637         }
 638
 639         strlcpy(thisname, lastname, l1 + 1);
 640         read_sbuf(f, &thisname[l1], l2);
 641         thisname[l1 + l2] = 0;
 642
 643         /* Abuse basename_len for a moment... */
 644         basename_len = strlcpy(lastname, thisname, MAXPATHLEN);
 645
 646 #ifdef ICONV_OPTION
 647         if (ic_recv != (iconv_t)-1) {
 648                 char *obuf = thisname;
 649                 ICONV_CONST char *ibuf = (ICONV_CONST char *)lastname;
 650                 size_t ocnt = MAXPATHLEN, icnt = basename_len;
 651
 652                 if (icnt >= MAXPATHLEN) {
 653                         errno = E2BIG;
 654                         goto convert_error;
 655                 }
 656
 657                 iconv(ic_recv, NULL,0, NULL,0);
 658                 if (iconv(ic_recv, &ibuf,&icnt, &obuf,&ocnt) == (size_t)-1) {
 659                   convert_error:
 660                         io_error |= IOERR_GENERAL;
 661                         rprintf(FINFO,
 662                             "[%s] cannot convert filename: %s (%s)\n",
 663                             who_am_i(), lastname, strerror(errno));
 664                         obuf = thisname;
 665                 }
 666                 *obuf = '\0';
 667         }
 668 #endif
 669
 670         clean_fname(thisname, 0);
 671
 672         if (sanitize_paths)
 673                 sanitize_path(thisname, thisname, "", 0, NULL);
 674
 675         if ((basename = strrchr(thisname, '/')) != NULL) {
 676                 int len = basename++ - thisname;
 677                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
 678                         lastdir = new_array(char, len + 1);
 679                         memcpy(lastdir, thisname, len);
 680                         lastdir[len] = '\0';
 681                         lastdir_len = len;
 682                         lastdir_depth = count_dir_elements(lastdir);
 683                 }
 684         } else
 685                 basename = thisname;
 686         basename_len = strlen(basename) + 1; /* count the '\0' */
 687
 688 #ifdef SUPPORT_HARD_LINKS
 689         if (protocol_version >= 30
 690          && BITS_SETnUNSET(xflags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
 691                 struct file_struct *first;
 692                 first_hlink_ndx = read_varint30(f);
 693                 if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->used) {
 694                         rprintf(FERROR,
 695                                 "hard-link reference out of range: %d (%d)\n",
 696                                 first_hlink_ndx, flist->used);
 697                         exit_cleanup(RERR_PROTOCOL);
 698                 }
 699                 first = flist->files[first_hlink_ndx];
 700                 file_length = F_LENGTH(first);
 701                 modtime = first->modtime;
 702                 mode = first->mode;
 703                 if (uid_ndx)
 704                         uid = F_OWNER(first);
 705                 if (gid_ndx)
 706                         gid = F_GROUP(first);
 707                 if ((preserve_devices && IS_DEVICE(mode))
 708                  || (preserve_specials && IS_SPECIAL(mode))) {
 709                         uint32 *devp = F_RDEV_P(first);
 710                         rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
 711                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 712                 }
 713                 if (preserve_links && S_ISLNK(mode))
 714                         linkname_len = strlen(F_SYMLINK(first)) + 1;
 715                 else
 716                         linkname_len = 0;
 717                 goto create_object;
 718         }
 719 #endif
 720
 721         file_length = read_varlong30(f, 3);
 722         if (!(xflags & XMIT_SAME_TIME)) {
 723                 if (protocol_version >= 30) {
 724                         modtime = read_varlong(f, 4);
 725 #if SIZEOF_TIME_T < SIZEOF_INT64
 726                         if ((modtime > INT_MAX || modtime < INT_MIN) && !am_generator) {
 727                                 rprintf(FERROR,
 728                                     "Time value of %s truncated on receiver.\n",
 729                                     lastname);
 730                         }
 731 #endif
 732                 } else
 733                         modtime = read_int(f);
 734         }
 735         if (!(xflags & XMIT_SAME_MODE))
 736                 mode = from_wire_mode(read_int(f));
 737
 738         if (chmod_modes && !S_ISLNK(mode))
 739                 mode = tweak_mode(mode, chmod_modes);
 740
 741         if (uid_ndx && !(xflags & XMIT_SAME_UID)) {
 742                 if (protocol_version < 30)
 743                         uid = (uid_t)read_int(f);
 744                 else {
 745                         uid = (uid_t)read_varint(f);
 746                         if (xflags & XMIT_USER_NAME_FOLLOWS)
 747                                 uid = recv_user_name(f, uid);
 748                         else if (inc_recurse && am_root && !numeric_ids)
 749                                 uid = match_uid(uid);
 750                 }
 751         }
 752         if (gid_ndx && !(xflags & XMIT_SAME_GID)) {
 753                 if (protocol_version < 30)
 754                         gid = (gid_t)read_int(f);
 755                 else {
 756                         gid = (gid_t)read_varint(f);
 757                         gid_flags = 0;
 758                         if (xflags & XMIT_GROUP_NAME_FOLLOWS)
 759                                 gid = recv_group_name(f, gid, &gid_flags);
 760                         else if (inc_recurse && (!am_root || !numeric_ids))
 761                                 gid = match_gid(gid, &gid_flags);
 762                 }
 763         }
 764
 765         if ((preserve_devices && IS_DEVICE(mode))
 766          || (preserve_specials && IS_SPECIAL(mode))) {
 767                 if (protocol_version < 28) {
 768                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 769                                 rdev = (dev_t)read_int(f);
 770                 } else {
 771                         uint32 rdev_minor;
 772                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 773                                 rdev_major = read_varint30(f);
 774                         if (protocol_version >= 30)
 775                                 rdev_minor = read_varint(f);
 776                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 777                                 rdev_minor = read_byte(f);
 778                         else
 779                                 rdev_minor = read_int(f);
 780                         rdev = MAKEDEV(rdev_major, rdev_minor);
 781                 }
 782                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 783                 file_length = 0;
 784         } else if (protocol_version < 28)
 785                 rdev = MAKEDEV(0, 0);
 786
 787 #ifdef SUPPORT_LINKS
 788         if (preserve_links && S_ISLNK(mode)) {
 789                 linkname_len = read_varint30(f) + 1; /* count the '\0' */
 790                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 791                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 792                                 linkname_len - 1);
 793                         overflow_exit("recv_file_entry");
 794                 }
 795         }
 796         else
 797 #endif
 798                 linkname_len = 0;
 799
 800 #ifdef SUPPORT_HARD_LINKS
 801   create_object:
 802         if (preserve_hard_links) {
 803                 if (protocol_version < 28 && S_ISREG(mode))
 804                         xflags |= XMIT_HLINKED;
 805                 if (xflags & XMIT_HLINKED)
 806                         extra_len += EXTRA_LEN;
 807         }
 808 #endif
 809
 810 #ifdef SUPPORT_ACLS
 811         /* We need one or two index int32s when we're preserving ACLs. */
 812         if (preserve_acls)
 813                 extra_len += (S_ISDIR(mode) ? 2 : 1) * EXTRA_LEN;
 814 #endif
 815
 816         if (always_checksum && S_ISREG(mode))
 817                 extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
 818
 819         if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
 820                 extra_len += EXTRA_LEN;
 821
 822 #if EXTRA_ROUNDING > 0
 823         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
 824                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
 825 #endif
 826
 827         if (inc_recurse && S_ISDIR(mode)) {
 828                 if (one_file_system) {
 829                         /* Room to save the dir's device for -x */
 830                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 831                 }
 832                 pool = dir_flist->file_pool;
 833         } else
 834                 pool = flist->file_pool;
 835
 836         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
 837                   + linkname_len;
 838         bp = pool_alloc(pool, alloc_len, "recv_file_entry");
 839
 840         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
 841         bp += extra_len;
 842         file = (struct file_struct *)bp;
 843         bp += FILE_STRUCT_LEN;
 844
 845         memcpy(bp, basename, basename_len);
 846         bp += basename_len + linkname_len; /* skip space for symlink too */
 847
 848 #ifdef SUPPORT_HARD_LINKS
 849         if (xflags & XMIT_HLINKED)
 850                 file->flags |= FLAG_HLINKED;
 851 #endif
 852         file->modtime = (time_t)modtime;
 853         file->len32 = (uint32)file_length;
 854         if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
 855                 file->flags |= FLAG_LENGTH64;
 856                 OPT_EXTRA(file, 0)->unum = (uint32)(file_length >> 32);
 857         }
 858         file->mode = mode;
 859         if (uid_ndx)
 860                 F_OWNER(file) = uid;
 861         if (gid_ndx) {
 862                 F_GROUP(file) = gid;
 863                 file->flags |= gid_flags;
 864         }
 865 #ifdef ICONV_OPTION
 866         if (ic_ndx)
 867                 F_NDX(file) = flist->used + flist->ndx_start;
 868 #endif
 869
 870         if (basename != thisname) {
 871                 file->dirname = lastdir;
 872                 F_DEPTH(file) = lastdir_depth + 1;
 873         } else
 874                 F_DEPTH(file) = 1;
 875
 876         if (S_ISDIR(mode)) {
 877                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
 878                         F_DEPTH(file)--;
 879                 if (xflags & XMIT_TOP_DIR) {
 880                         in_del_hier = recurse;
 881                         del_hier_name_len = F_DEPTH(file) == 0 ? 0 : l1 + l2;
 882                         if (relative_paths && del_hier_name_len > 2
 883                             && lastname[del_hier_name_len-1] == '.'
 884                             && lastname[del_hier_name_len-2] == '/')
 885                                 del_hier_name_len -= 2;
 886                         file->flags |= FLAG_TOP_DIR | FLAG_XFER_DIR;
 887                 } else if (in_del_hier) {
 888                         if (!relative_paths || !del_hier_name_len
 889                          || (l1 >= del_hier_name_len
 890                           && lastname[del_hier_name_len] == '/'))
 891                                 file->flags |= FLAG_XFER_DIR;
 892                         else
 893                                 in_del_hier = 0;
 894                 }
 895         }
 896
 897         if ((preserve_devices && IS_DEVICE(mode))
 898          || (preserve_specials && IS_SPECIAL(mode))) {
 899                 uint32 *devp = F_RDEV_P(file);
 900                 DEV_MAJOR(devp) = major(rdev);
 901                 DEV_MINOR(devp) = minor(rdev);
 902         }
 903
 904 #ifdef SUPPORT_LINKS
 905         if (linkname_len) {
 906                 bp = (char*)file->basename + basename_len;
 907                 if (first_hlink_ndx >= 0) {
 908                         struct file_struct *first = flist->files[first_hlink_ndx];
 909                         memcpy(bp, F_SYMLINK(first), linkname_len);
 910                 } else
 911                         read_sbuf(f, bp, linkname_len - 1);
 912                 if (sanitize_paths)
 913                         sanitize_path(bp, bp, "", lastdir_depth, NULL);
 914         }
 915 #endif
 916
 917 #ifdef SUPPORT_HARD_LINKS
 918         if (preserve_hard_links && xflags & XMIT_HLINKED) {
 919                 if (protocol_version >= 30) {
 920                         F_HL_GNUM(file) = xflags & XMIT_HLINK_FIRST
 921                                         ? flist->used : first_hlink_ndx;
 922                 } else {
 923                         static int32 cnt = 0;
 924                         struct idev_node *np;
 925                         int64 ino;
 926                         int32 ndx;
 927                         if (protocol_version < 26) {
 928                                 dev = read_int(f);
 929                                 ino = read_int(f);
 930                         } else {
 931                                 if (!(xflags & XMIT_SAME_DEV_pre30))
 932                                         dev = read_longint(f);
 933                                 ino = read_longint(f);
 934                         }
 935                         np = idev_node(dev, ino);
 936                         ndx = (int32)(long)np->data - 1;
 937                         if (ndx < 0) {
 938                                 ndx = cnt++;
 939                                 np->data = (void*)(long)cnt;
 940                         }
 941                         F_HL_GNUM(file) = ndx;
 942                 }
 943         }
 944 #endif
 945
 946         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 947                 if (S_ISREG(mode))
 948                         bp = F_SUM(file);
 949                 else {
 950                         /* Prior to 28, we get a useless set of nulls. */
 951                         bp = tmp_sum;
 952                 }
 953                 if (first_hlink_ndx >= 0) {
 954                         struct file_struct *first = flist->files[first_hlink_ndx];
 955                         memcpy(bp, F_SUM(first), checksum_len);
 956                 } else
 957                         read_buf(f, bp, checksum_len);
 958         }
 959
 960 #ifdef SUPPORT_ACLS
 961         if (preserve_acls && !S_ISLNK(mode))
 962                 receive_acl(file, f);
 963 #endif
 964 #ifdef SUPPORT_XATTRS
 965         if (preserve_xattrs)
 966                 receive_xattr(file, f );
 967 #endif
 968
 969         if (S_ISREG(mode) || S_ISLNK(mode))
 970                 stats.total_size += file_length;
 971
 972         return file;
 973 }
 974
 975 /**
 976  * Create a file_struct for a named file by reading its stat()
 977  * information and performing extensive checks against global
 978  * options.
 979  *
 980  * @return the new file, or NULL if there was an error or this file
 981  * should be excluded.
 982  *
 983  * @todo There is a small optimization opportunity here to avoid
 984  * stat()ing the file in some circumstances, which has a certain cost.
 985  * We are called immediately after doing readdir(), and so we may
 986  * already know the d_type of the file.  We could for example avoid
 987  * statting directories if we're not recursing, but this is not a very
 988  * important case.  Some systems may not have d_type.
 989  **/
 990 struct file_struct *make_file(const char *fname, struct file_list *flist,
 991                               STRUCT_STAT *stp, int flags, int filter_level)
 992 {
 993         static char *lastdir;
 994         static int lastdir_len = -1;
 995         struct file_struct *file;
 996         STRUCT_STAT st;
 997         char thisname[MAXPATHLEN];
 998         char linkname[MAXPATHLEN];
 999         int alloc_len, basename_len, linkname_len;
1000         int extra_len = file_extra_cnt * EXTRA_LEN;
1001         const char *basename;
1002         alloc_pool_t *pool;
1003         char *bp;
1004
1005         if (strlcpy(thisname, fname, sizeof thisname) >= sizeof thisname) {
1006                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
1007                 return NULL;
1008         }
1009         clean_fname(thisname, 0);
1010         if (sanitize_paths)
1011                 sanitize_path(thisname, thisname, "", 0, NULL);
1012
1013         if (stp && S_ISDIR(stp->st_mode)) {
1014                 st = *stp; /* Needed for "symlink/." with --relative. */
1015                 *linkname = '\0'; /* make IBM code checker happy */
1016         } else if (readlink_stat(thisname, &st, linkname) != 0) {
1017                 int save_errno = errno;
1018                 /* See if file is excluded before reporting an error. */
1019                 if (filter_level != NO_FILTERS
1020                  && (is_excluded(thisname, 0, filter_level)
1021                   || is_excluded(thisname, 1, filter_level))) {
1022                         if (ignore_perishable && save_errno != ENOENT)
1023                                 non_perishable_cnt++;
1024                         return NULL;
1025                 }
1026                 if (save_errno == ENOENT) {
1027 #ifdef SUPPORT_LINKS
1028                         /* Avoid "vanished" error if symlink points nowhere. */
1029                         if (copy_links && x_lstat(thisname, &st, NULL) == 0
1030                             && S_ISLNK(st.st_mode)) {
1031                                 io_error |= IOERR_GENERAL;
1032                                 rprintf(FERROR, "symlink has no referent: %s\n",
1033                                         full_fname(thisname));
1034                         } else
1035 #endif
1036                         {
1037                                 enum logcode c = am_daemon && protocol_version < 28
1038                                     ? FERROR : FINFO;
1039                                 io_error |= IOERR_VANISHED;
1040                                 rprintf(c, "file has vanished: %s\n",
1041                                         full_fname(thisname));
1042                         }
1043                 } else {
1044                         io_error |= IOERR_GENERAL;
1045                         rsyserr(FERROR, save_errno, "readlink %s failed",
1046                                 full_fname(thisname));
1047                 }
1048                 return NULL;
1049         }
1050
1051         /* backup.c calls us with filter_level set to NO_FILTERS. */
1052         if (filter_level == NO_FILTERS)
1053                 goto skip_filters;
1054
1055         if (S_ISDIR(st.st_mode) && !xfer_dirs) {
1056                 rprintf(FINFO, "skipping directory %s\n", thisname);
1057                 return NULL;
1058         }
1059
1060         /* -x only affects directories because we need to avoid recursing
1061          * into a mount-point directory, not to avoid copying a symlinked
1062          * file if -L (or similar) was specified. */
1063         if (one_file_system && st.st_dev != filesystem_dev
1064          && S_ISDIR(st.st_mode)) {
1065                 if (one_file_system > 1) {
1066                         if (verbose > 2) {
1067                                 rprintf(FINFO, "skipping mount-point dir %s\n",
1068                                         thisname);
1069                         }
1070                         return NULL;
1071                 }
1072                 flags |= FLAG_MOUNT_DIR;
1073         }
1074
1075         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level)) {
1076                 if (ignore_perishable)
1077                         non_perishable_cnt++;
1078                 return NULL;
1079         }
1080
1081         if (lp_ignore_nonreadable(module_id)) {
1082 #ifdef SUPPORT_LINKS
1083                 if (!S_ISLNK(st.st_mode))
1084 #endif
1085                         if (access(thisname, R_OK) != 0)
1086                                 return NULL;
1087         }
1088
1089   skip_filters:
1090
1091         /* Only divert a directory in the main transfer. */
1092         if (flist) {
1093                 if (flist->prev && S_ISDIR(st.st_mode)
1094                  && flags & FLAG_DIVERT_DIRS) {
1095                         /* Room for parent/sibling/next-child info. */
1096                         extra_len += DIRNODE_EXTRA_CNT * EXTRA_LEN;
1097                         dir_count++;
1098                         pool = dir_flist->file_pool;
1099                 } else
1100                         pool = flist->file_pool;
1101         } else
1102                 pool = NULL;
1103
1104         if (verbose > 2) {
1105                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
1106                         who_am_i(), thisname, filter_level);
1107         }
1108
1109         if ((basename = strrchr(thisname, '/')) != NULL) {
1110                 int len = basename++ - thisname;
1111                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
1112                         lastdir = new_array(char, len + 1);
1113                         memcpy(lastdir, thisname, len);
1114                         lastdir[len] = '\0';
1115                         lastdir_len = len;
1116                 }
1117         } else
1118                 basename = thisname;
1119         basename_len = strlen(basename) + 1; /* count the '\0' */
1120
1121 #ifdef SUPPORT_LINKS
1122         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
1123 #else
1124         linkname_len = 0;
1125 #endif
1126
1127         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
1128                 extra_len += EXTRA_LEN;
1129
1130 #if EXTRA_ROUNDING > 0
1131         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
1132                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
1133 #endif
1134
1135         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
1136                   + linkname_len;
1137         if (pool)
1138                 bp = pool_alloc(pool, alloc_len, "make_file");
1139         else {
1140                 if (!(bp = new_array(char, alloc_len)))
1141                         out_of_memory("make_file");
1142         }
1143
1144         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
1145         bp += extra_len;
1146         file = (struct file_struct *)bp;
1147         bp += FILE_STRUCT_LEN;
1148
1149         memcpy(bp, basename, basename_len);
1150         bp += basename_len + linkname_len; /* skip space for symlink too */
1151
1152 #ifdef SUPPORT_HARD_LINKS
1153         if (preserve_hard_links && flist && flist->prev) {
1154                 if (protocol_version >= 28
1155                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
1156                  : S_ISREG(st.st_mode)) {
1157                         tmp_dev = st.st_dev;
1158                         tmp_ino = st.st_ino;
1159                 } else
1160                         tmp_dev = 0;
1161         }
1162 #endif
1163
1164 #ifdef HAVE_STRUCT_STAT_ST_RDEV
1165         if (IS_DEVICE(st.st_mode) || IS_SPECIAL(st.st_mode)) {
1166                 tmp_rdev = st.st_rdev;
1167                 st.st_size = 0;
1168         }
1169 #endif
1170
1171         file->flags = flags;
1172         file->modtime = st.st_mtime;
1173         file->len32 = (uint32)st.st_size;
1174         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
1175                 file->flags |= FLAG_LENGTH64;
1176                 OPT_EXTRA(file, 0)->unum = (uint32)(st.st_size >> 32);
1177         }
1178         file->mode = st.st_mode;
1179         if (uid_ndx)
1180                 F_OWNER(file) = st.st_uid;
1181         if (gid_ndx)
1182                 F_GROUP(file) = st.st_gid;
1183
1184         if (basename != thisname)
1185                 file->dirname = lastdir;
1186
1187 #ifdef SUPPORT_LINKS
1188         if (linkname_len) {
1189                 bp = (char*)file->basename + basename_len;
1190                 memcpy(bp, linkname, linkname_len);
1191         }
1192 #endif
1193
1194         if (always_checksum && am_sender && S_ISREG(st.st_mode))
1195                 file_checksum(thisname, tmp_sum, st.st_size);
1196
1197         F_PATHNAME(file) = pathname;
1198
1199         /* This code is only used by the receiver when it is building
1200          * a list of files for a delete pass. */
1201         if (keep_dirlinks && linkname_len && flist) {
1202                 STRUCT_STAT st2;
1203                 int save_mode = file->mode;
1204                 file->mode = S_IFDIR; /* Find a directory with our name. */
1205                 if (flist_find(dir_flist, file) >= 0
1206                  && x_stat(thisname, &st2, NULL) == 0 && S_ISDIR(st2.st_mode)) {
1207                         file->modtime = st2.st_mtime;
1208                         file->len32 = 0;
1209                         file->mode = st2.st_mode;
1210                         if (uid_ndx)
1211                                 F_OWNER(file) = st2.st_uid;
1212                         if (gid_ndx)
1213                                 F_GROUP(file) = st2.st_gid;
1214                 } else
1215                         file->mode = save_mode;
1216         }
1217
1218         if (basename_len == 0+1)
1219                 return NULL;
1220
1221 #ifdef ICONV_OPTION
1222         if (ic_ndx)
1223                 F_NDX(file) = dir_count - 1;
1224 #endif
1225
1226         return file;
1227 }
1228
1229 /* Only called for temporary file_struct entries created by make_file(). */
1230 void unmake_file(struct file_struct *file)
1231 {
1232         int extra_cnt = file_extra_cnt + LEN64_BUMP(file);
1233 #if EXTRA_ROUNDING > 0
1234         if (extra_cnt & EXTRA_ROUNDING)
1235                 extra_cnt = (extra_cnt | EXTRA_ROUNDING) + 1;
1236 #endif
1237         free(REQ_EXTRA(file, extra_cnt));
1238 }
1239
1240 static struct file_struct *send_file_name(int f, struct file_list *flist,
1241                                           char *fname, STRUCT_STAT *stp,
1242                                           int flags, int filter_level)
1243 {
1244         struct file_struct *file;
1245 #if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
1246         statx sx;
1247 #endif
1248
1249         file = make_file(fname, flist, stp, flags, filter_level);
1250         if (!file)
1251                 return NULL;
1252
1253         if (chmod_modes && !S_ISLNK(file->mode))
1254                 file->mode = tweak_mode(file->mode, chmod_modes);
1255
1256 #ifdef SUPPORT_ACLS
1257         if (preserve_acls && !S_ISLNK(file->mode) && f >= 0) {
1258                 sx.st.st_mode = file->mode;
1259                 sx.acc_acl = sx.def_acl = NULL;
1260                 if (get_acl(fname, &sx) < 0)
1261                         return NULL;
1262         }
1263 #endif
1264 #ifdef SUPPORT_XATTRS
1265         if (preserve_xattrs && f >= 0) {
1266                 sx.xattr = NULL;
1267                 if (get_xattr(fname, &sx) < 0)
1268                         return NULL;
1269         }
1270 #endif
1271
1272         maybe_emit_filelist_progress(flist->used + flist_count_offset);
1273
1274         flist_expand(flist, 1);
1275         flist->files[flist->used++] = file;
1276         if (f >= 0) {
1277                 send_file_entry(f, file, flist->used - 1);
1278 #ifdef SUPPORT_ACLS
1279                 if (preserve_acls && !S_ISLNK(file->mode)) {
1280                         send_acl(&sx, f);
1281                         free_acl(&sx);
1282                 }
1283 #endif
1284 #ifdef SUPPORT_XATTRS
1285                 if (preserve_xattrs) {
1286                         F_XATTR(file) = send_xattr(&sx, f);
1287                         free_xattr(&sx);
1288                 }
1289 #endif
1290         }
1291         return file;
1292 }
1293
1294 static void send_if_directory(int f, struct file_list *flist,
1295                               struct file_struct *file,
1296                               char *fbuf, unsigned int ol,
1297                               int flags)
1298 {
1299         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1300
1301         if (S_ISDIR(file->mode)
1302             && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) {
1303                 void *save_filters;
1304                 unsigned int len = strlen(fbuf);
1305                 if (len > 1 && fbuf[len-1] == '/')
1306                         fbuf[--len] = '\0';
1307                 if (len >= MAXPATHLEN - 1) {
1308                         io_error |= IOERR_GENERAL;
1309                         rprintf(FERROR, "skipping long-named directory: %s\n",
1310                                 full_fname(fbuf));
1311                         return;
1312                 }
1313                 save_filters = push_local_filters(fbuf, len);
1314                 send_directory(f, flist, fbuf, len, flags);
1315                 pop_local_filters(save_filters);
1316                 fbuf[ol] = '\0';
1317                 if (is_dot_dir)
1318                         fbuf[ol-1] = '.';
1319         }
1320 }
1321
1322 static int file_compare(const void *file1, const void *file2)
1323 {
1324         return f_name_cmp(*(struct file_struct **)file1,
1325                           *(struct file_struct **)file2);
1326 }
1327
1328 /* The guts of a merge-sort algorithm.  This was derived from the glibc
1329  * version, but I (Wayne) changed the merge code to do less copying and
1330  * to require only half the amount of temporary memory. */
1331 static void fsort_tmp(struct file_struct **fp, size_t num,
1332                       struct file_struct **tmp)
1333 {
1334         struct file_struct **f1, **f2, **t;
1335         size_t n1, n2;
1336
1337         n1 = num / 2;
1338         n2 = num - n1;
1339         f1 = fp;
1340         f2 = fp + n1;
1341
1342         if (n1 > 1)
1343                 fsort_tmp(f1, n1, tmp);
1344         if (n2 > 1)
1345                 fsort_tmp(f2, n2, tmp);
1346
1347         while (f_name_cmp(*f1, *f2) <= 0) {
1348                 if (!--n1)
1349                         return;
1350                 f1++;
1351         }
1352
1353         t = tmp;
1354         memcpy(t, f1, n1 * PTR_SIZE);
1355
1356         *f1++ = *f2++, n2--;
1357
1358         while (n1 > 0 && n2 > 0) {
1359                 if (f_name_cmp(*t, *f2) <= 0)
1360                         *f1++ = *t++, n1--;
1361                 else
1362                         *f1++ = *f2++, n2--;
1363         }
1364
1365         if (n1 > 0)
1366                 memcpy(f1, t, n1 * PTR_SIZE);
1367 }
1368
1369 /* This file-struct sorting routine makes sure that any identical names in
1370  * the file list stay in the same order as they were in the original list.
1371  * This is particularly vital in inc_recurse mode where we expect a sort
1372  * on the flist to match the exact order of a sort on the dir_flist. */
1373 static void fsort(struct file_struct **fp, size_t num)
1374 {
1375         if (num <= 1)
1376                 return;
1377
1378         if (use_qsort)
1379                 qsort(fp, num, PTR_SIZE, file_compare);
1380         else {
1381                 struct file_struct **tmp = new_array(struct file_struct *,
1382                                                      (num+1) / 2);
1383                 fsort_tmp(fp, num, tmp);
1384                 free(tmp);
1385         }
1386 }
1387
1388 /* We take an entire set of sibling dirs from the sorted flist and link them
1389  * into the tree, setting the appropriate parent/child/sibling pointers. */
1390 static void add_dirs_to_tree(int parent_ndx, struct file_list *from_flist,
1391                              int dir_cnt)
1392 {
1393         int i;
1394         int32 *dp = NULL;
1395         int32 *parent_dp = parent_ndx < 0 ? NULL
1396                          : F_DIR_NODE_P(dir_flist->sorted[parent_ndx]);
1397
1398         flist_expand(dir_flist, dir_cnt);
1399         dir_flist->sorted = dir_flist->files;
1400
1401         for (i = 0; dir_cnt; i++) {
1402                 struct file_struct *file = from_flist->sorted[i];
1403
1404                 if (!S_ISDIR(file->mode))
1405                         continue;
1406
1407                 dir_flist->files[dir_flist->used++] = file;
1408                 dir_cnt--;
1409
1410                 if (!(file->flags & FLAG_XFER_DIR)
1411                  || file->flags & FLAG_MOUNT_DIR)
1412                         continue;
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
1472                 send_file_name(f, flist, fbuf, NULL, flags, filter_level);
1473         }
1474
1475         fbuf[len] = '\0';
1476
1477         if (errno) {
1478                 io_error |= IOERR_GENERAL;
1479                 rsyserr(FERROR, errno, "readdir(%s)", full_fname(fbuf));
1480         }
1481
1482         closedir(d);
1483
1484         if (f >= 0 && recurse && !divert_dirs) {
1485                 int i, end = flist->used - 1;
1486                 /* send_if_directory() bumps flist->used, so use "end". */
1487                 for (i = start; i <= end; i++)
1488                         send_if_directory(f, flist, flist->files[i], fbuf, len, flags);
1489         }
1490 }
1491
1492 static void send1extra(int f, struct file_struct *file, struct file_list *flist)
1493 {
1494         char fbuf[MAXPATHLEN];
1495         int dlen;
1496
1497         f_name(file, fbuf);
1498         dlen = strlen(fbuf);
1499
1500         if (F_PATHNAME(file) != pathname) {
1501                 if (!push_pathname(F_PATHNAME(file), -1))
1502                         exit_cleanup(RERR_FILESELECT);
1503         }
1504
1505         change_local_filter_dir(fbuf, dlen, send_dir_depth);
1506
1507         send_directory(f, flist, fbuf, dlen, FLAG_DIVERT_DIRS | FLAG_XFER_DIR);
1508 }
1509
1510 void send_extra_file_list(int f, int at_least)
1511 {
1512         struct file_list *flist;
1513         int64 start_write;
1514         int future_cnt, save_io_error = io_error;
1515
1516         if (flist_eof)
1517                 return;
1518
1519         /* Keep sending data until we have the requested number of
1520          * files in the upcoming file-lists. */
1521         if (cur_flist->next) {
1522                 flist = first_flist->prev; /* the newest flist */
1523                 future_cnt = flist->ndx_end - cur_flist->next->ndx_start + 1;
1524         } else
1525                 future_cnt = 0;
1526         while (future_cnt < at_least) {
1527                 struct file_struct *file = dir_flist->sorted[send_dir_ndx];
1528                 int dir_ndx, dstart = dir_count;
1529                 int32 *dp;
1530
1531                 flist = flist_new(0, "send_extra_file_list");
1532                 start_write = stats.total_written;
1533
1534 #ifdef ICONV_OPTION
1535                 if (ic_ndx)
1536                         dir_ndx = F_NDX(file);
1537                 else
1538 #endif
1539                         dir_ndx = send_dir_ndx;
1540                 write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
1541                 flist->parent_ndx = dir_ndx;
1542
1543                 send1extra(f, file, flist);
1544                 dp = F_DIR_NODE_P(file);
1545
1546                 /* If there are any duplicate directory names that follow, we
1547                  * send all the dirs together in one file-list.  The dir_flist
1548                  * tree links all the child subdirs onto the last dup dir. */
1549                 while ((dir_ndx = DIR_NEXT_SIBLING(dp)) >= 0
1550                     && dir_flist->sorted[dir_ndx]->flags & FLAG_DUPLICATE) {
1551                         send_dir_ndx = dir_ndx;
1552                         file = dir_flist->sorted[dir_ndx];
1553                         send1extra(f, file, flist);
1554                         dp = F_DIR_NODE_P(file);
1555                 }
1556
1557                 write_byte(f, 0);
1558
1559 #ifdef ICONV_OPTION
1560                 if (need_unsorted_flist) {
1561                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
1562                                 out_of_memory("send_extra_file_list");
1563                         memcpy(flist->sorted, flist->files,
1564                                flist->used * sizeof (struct file_struct*));
1565                 } else
1566 #endif
1567                         flist->sorted = flist->files;
1568
1569                 clean_flist(flist, 0);
1570
1571                 flist->ndx_end = flist->ndx_start + flist->used - 1
1572                                - (dir_count - dstart);
1573
1574                 add_dirs_to_tree(send_dir_ndx, flist, dir_count - dstart);
1575                 flist_done_allocating(flist);
1576
1577                 file_total += flist->used;
1578                 future_cnt += flist->used;
1579                 stats.flist_size += stats.total_written - start_write;
1580                 stats.num_files += flist->used;
1581                 if (verbose > 3)
1582                         output_flist(flist);
1583
1584                 if (DIR_FIRST_CHILD(dp) >= 0) {
1585                         send_dir_ndx = DIR_FIRST_CHILD(dp);
1586                         send_dir_depth++;
1587                 } else {
1588                         while (DIR_NEXT_SIBLING(dp) < 0) {
1589                                 if ((send_dir_ndx = DIR_PARENT(dp)) < 0) {
1590                                         write_ndx(f, NDX_FLIST_EOF);
1591                                         flist_eof = 1;
1592                                         change_local_filter_dir(NULL, 0, 0);
1593                                         goto finish;
1594                                 }
1595                                 send_dir_depth--;
1596                                 file = dir_flist->sorted[send_dir_ndx];
1597                                 dp = F_DIR_NODE_P(file);
1598                         }
1599                         send_dir_ndx = DIR_NEXT_SIBLING(dp);
1600                 }
1601         }
1602
1603   finish:
1604         if (io_error != save_io_error && !ignore_errors)
1605                 send_msg_int(MSG_IO_ERROR, io_error);
1606 }
1607
1608 struct file_list *send_file_list(int f, int argc, char *argv[])
1609 {
1610         static const char *lastdir;
1611         static int lastdir_len = -1;
1612         int len, dirlen;
1613         STRUCT_STAT st;
1614         char *p, *dir;
1615         char lastpath[MAXPATHLEN] = "";
1616         struct file_list *flist;
1617         struct timeval start_tv, end_tv;
1618         int64 start_write;
1619         int use_ff_fd = 0;
1620         int flags, disable_buffering;
1621
1622         rprintf(FLOG, "building file list\n");
1623         if (show_filelist_p())
1624                 start_filelist_progress("building file list");
1625         else if (inc_recurse && verbose && !am_server)
1626                 rprintf(FCLIENT, "sending incremental file list\n");
1627
1628         start_write = stats.total_written;
1629         gettimeofday(&start_tv, NULL);
1630
1631 #ifdef SUPPORT_HARD_LINKS
1632         if (preserve_hard_links && protocol_version >= 30 && !cur_flist)
1633                 init_hard_links();
1634 #endif
1635
1636         flist = cur_flist = flist_new(0, "send_file_list");
1637         if (inc_recurse) {
1638                 dir_flist = flist_new(FLIST_TEMP, "send_file_list");
1639                 flags = FLAG_DIVERT_DIRS;
1640         } else {
1641                 dir_flist = cur_flist;
1642                 flags = 0;
1643         }
1644
1645         disable_buffering = io_start_buffering_out(f);
1646         if (filesfrom_fd >= 0) {
1647                 if (argv[0] && !push_dir(argv[0], 0)) {
1648                         rsyserr(FERROR, errno, "push_dir %s failed in %s",
1649                                 full_fname(argv[0]), curr_dir);
1650                         exit_cleanup(RERR_FILESELECT);
1651                 }
1652                 use_ff_fd = 1;
1653         }
1654
1655         while (1) {
1656                 char fbuf[MAXPATHLEN];
1657                 char *fn;
1658                 int is_dot_dir;
1659
1660                 if (use_ff_fd) {
1661                         if (read_filesfrom_line(filesfrom_fd, fbuf) == 0)
1662                                 break;
1663                         sanitize_path(fbuf, fbuf, "", 0, NULL);
1664                 } else {
1665                         if (argc-- == 0)
1666                                 break;
1667                         strlcpy(fbuf, *argv++, MAXPATHLEN);
1668                         if (sanitize_paths)
1669                                 sanitize_path(fbuf, fbuf, "", 0, NULL);
1670                 }
1671
1672                 len = strlen(fbuf);
1673                 if (relative_paths) {
1674                         /* We clean up fbuf below. */
1675                         is_dot_dir = 0;
1676                 } else if (!len || fbuf[len - 1] == '/') {
1677                         if (len == 2 && fbuf[0] == '.') {
1678                                 /* Turn "./" into just "." rather than "./." */
1679                                 fbuf[1] = '\0';
1680                         } else {
1681                                 if (len + 1 >= MAXPATHLEN)
1682                                         overflow_exit("send_file_list");
1683                                 fbuf[len++] = '.';
1684                                 fbuf[len] = '\0';
1685                         }
1686                         is_dot_dir = 1;
1687                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
1688                     && (len == 2 || fbuf[len-3] == '/')) {
1689                         if (len + 2 >= MAXPATHLEN)
1690                                 overflow_exit("send_file_list");
1691                         fbuf[len++] = '/';
1692                         fbuf[len++] = '.';
1693                         fbuf[len] = '\0';
1694                         is_dot_dir = 1;
1695                 } else {
1696                         is_dot_dir = fbuf[len-1] == '.'
1697                                    && (len == 1 || fbuf[len-2] == '/');
1698                 }
1699
1700                 dir = NULL;
1701
1702                 if (!relative_paths) {
1703                         p = strrchr(fbuf, '/');
1704                         if (p) {
1705                                 *p = '\0';
1706                                 if (p == fbuf)
1707                                         dir = "/";
1708                                 else
1709                                         dir = fbuf;
1710                                 len -= p - fbuf + 1;
1711                                 fn = p + 1;
1712                         } else
1713                                 fn = fbuf;
1714                 } else {
1715                         if ((p = strstr(fbuf, "/./")) != NULL) {
1716                                 *p = '\0';
1717                                 if (p == fbuf)
1718                                         dir = "/";
1719                                 else
1720                                         dir = fbuf;
1721                                 len -= p - fbuf + 3;
1722                                 fn = p + 3;
1723                         } else
1724                                 fn = fbuf;
1725                         /* Get rid of trailing "/" and "/.". */
1726                         while (len) {
1727                                 if (fn[len - 1] == '/') {
1728                                         is_dot_dir = 1;
1729                                         if (!--len && !dir) {
1730                                                 len++;
1731                                                 break;
1732                                         }
1733                                 }
1734                                 else if (len >= 2 && fn[len - 1] == '.'
1735                                                   && fn[len - 2] == '/') {
1736                                         is_dot_dir = 1;
1737                                         if (!(len -= 2) && !dir) {
1738                                                 len++;
1739                                                 break;
1740                                         }
1741                                 } else
1742                                         break;
1743                         }
1744                         if (len == 1 && fn[0] == '/')
1745                                 fn[len++] = '.';
1746                         fn[len] = '\0';
1747                         /* Reject a ".." dir in the active part of the path. */
1748                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
1749                                 if ((p[2] == '/' || p[2] == '\0')
1750                                  && (p == fn || p[-1] == '/')) {
1751                                         rprintf(FERROR,
1752                                             "found \"..\" dir in relative path: %s\n",
1753                                             fbuf);
1754                                         exit_cleanup(RERR_SYNTAX);
1755                                 }
1756                         }
1757                 }
1758
1759                 if (!*fn) {
1760                         len = 1;
1761                         fn = ".";
1762                 }
1763
1764                 dirlen = dir ? strlen(dir) : 0;
1765                 if (dirlen != lastdir_len || memcmp(lastdir, dir, dirlen) != 0) {
1766                         if (!push_pathname(dir ? strdup(dir) : NULL, dirlen))
1767                                 goto push_error;
1768                         lastdir = pathname;
1769                         lastdir_len = pathname_len;
1770                 } else if (!push_pathname(lastdir, lastdir_len)) {
1771                   push_error:
1772                         io_error |= IOERR_GENERAL;
1773                         rsyserr(FERROR, errno, "push_dir %s failed in %s",
1774                                 full_fname(dir), curr_dir);
1775                         continue;
1776                 }
1777
1778                 if (fn != fbuf)
1779                         memmove(fbuf, fn, len + 1);
1780
1781                 if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1782                         io_error |= IOERR_GENERAL;
1783                         rsyserr(FERROR, errno, "link_stat %s failed",
1784                                 full_fname(fbuf));
1785                         continue;
1786                 }
1787
1788                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
1789                         rprintf(FINFO, "skipping directory %s\n", fbuf);
1790                         continue;
1791                 }
1792
1793                 if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
1794                         /* Send the implied directories at the start of the
1795                          * source spec, so we get their permissions right. */
1796                         char *lp = lastpath, *slash = fbuf;
1797                         *p = '\0';
1798                         /* Skip any initial directories in our path that we
1799                          * have in common with lastpath. */
1800                         for (fn = fbuf; *fn && *lp == *fn; lp++, fn++) {
1801                                 if (*fn == '/')
1802                                         slash = fn;
1803                         }
1804                         *p = '/';
1805                         if (fn != p || (*lp && *lp != '/')) {
1806                                 int save_copy_links = copy_links;
1807                                 int save_xfer_dirs = xfer_dirs;
1808                                 int dir_flags = inc_recurse ? FLAG_DIVERT_DIRS : 0;
1809                                 copy_links |= copy_unsafe_links;
1810                                 xfer_dirs = 1;
1811                                 while ((slash = strchr(slash+1, '/')) != 0) {
1812                                         *slash = '\0';
1813                                         send_file_name(f, flist, fbuf, NULL,
1814                                                        dir_flags, ALL_FILTERS);
1815                                         *slash = '/';
1816                                 }
1817                                 copy_links = save_copy_links;
1818                                 xfer_dirs = save_xfer_dirs;
1819                                 *p = '\0';
1820                                 strlcpy(lastpath, fbuf, sizeof lastpath);
1821                                 *p = '/';
1822                         }
1823                 }
1824
1825                 if (one_file_system)
1826                         filesystem_dev = st.st_dev;
1827
1828                 if (recurse || (xfer_dirs && is_dot_dir)) {
1829                         struct file_struct *file;
1830                         int top_flags = FLAG_TOP_DIR | FLAG_XFER_DIR | flags;
1831                         file = send_file_name(f, flist, fbuf, &st,
1832                                               top_flags, ALL_FILTERS);
1833                         if (file && !inc_recurse)
1834                                 send_if_directory(f, flist, file, fbuf, len, flags);
1835                 } else
1836                         send_file_name(f, flist, fbuf, &st, flags, ALL_FILTERS);
1837         }
1838
1839         gettimeofday(&end_tv, NULL);
1840         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
1841                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
1842         if (stats.flist_buildtime == 0)
1843                 stats.flist_buildtime = 1;
1844         start_tv = end_tv;
1845
1846         write_byte(f, 0); /* Indicate end of file list */
1847
1848 #ifdef SUPPORT_HARD_LINKS
1849         if (preserve_hard_links && protocol_version >= 30 && !inc_recurse)
1850                 idev_destroy();
1851 #endif
1852
1853         if (show_filelist_p())
1854                 finish_filelist_progress(flist);
1855
1856         gettimeofday(&end_tv, NULL);
1857         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
1858                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
1859
1860         /* When converting names, both sides keep an unsorted file-list array
1861          * because the names will differ on the sending and receiving sides
1862          * (both sides will use the unsorted index number for each item). */
1863
1864         /* Sort the list without removing any duplicates.  This allows the
1865          * receiving side to ask for whatever name it kept.  For incremental
1866          * recursion mode, the sender marks duplicate dirs so that it can
1867          * send them together in a single file-list. */
1868 #ifdef ICONV_OPTION
1869         if (need_unsorted_flist) {
1870                 if (inc_recurse) {
1871                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
1872                                 out_of_memory("send_file_list");
1873                         memcpy(flist->sorted, flist->files,
1874                                flist->used * sizeof (struct file_struct*));
1875                         clean_flist(flist, 0);
1876                 } else {
1877                         flist->sorted = flist->files;
1878                         flist->low = 0;
1879                         flist->high = flist->used - 1;
1880                 }
1881         } else
1882 #endif
1883         {
1884                 flist->sorted = flist->files;
1885                 clean_flist(flist, 0);
1886         }
1887         file_total += flist->used;
1888
1889         /* We don't subtract dir_count for the first send since we
1890          * might have one or more dot dirs which need to get sent. */
1891         flist->ndx_end = flist->ndx_start + flist->used - 1;
1892
1893         if (!numeric_ids && !inc_recurse)
1894                 send_id_list(f);
1895
1896         /* send the io_error flag */
1897         if (protocol_version < 30)
1898                 write_int(f, ignore_errors ? 0 : io_error);
1899         else if (io_error && !ignore_errors)
1900                 send_msg_int(MSG_IO_ERROR, io_error);
1901
1902         if (disable_buffering)
1903                 io_end_buffering_out();
1904
1905         stats.flist_size = stats.total_written - start_write;
1906         stats.num_files = flist->used;
1907
1908         if (verbose > 3)
1909                 output_flist(flist);
1910
1911         if (verbose > 2)
1912                 rprintf(FINFO, "send_file_list done\n");
1913
1914         if (inc_recurse) {
1915                 add_dirs_to_tree(-1, flist, dir_count);
1916                 flist_done_allocating(flist);
1917                 if (send_dir_ndx < 0) {
1918                         write_ndx(f, NDX_FLIST_EOF);
1919                         flist_eof = 1;
1920                 }
1921                 else if (file_total == 1) {
1922                         /* If we're creating incremental file-lists and there
1923                          * was just 1 item in the first file-list, send 1 more
1924                          * file-list to check if this is a 1-file xfer. */
1925                         send_extra_file_list(f, 1);
1926                 }
1927         }
1928
1929         return flist;
1930 }
1931
1932 struct file_list *recv_file_list(int f)
1933 {
1934         struct file_list *flist;
1935         int dstart, flags;
1936         int64 start_read;
1937
1938         if (!first_flist)
1939                 rprintf(FLOG, "receiving file list\n");
1940         if (show_filelist_p())
1941                 start_filelist_progress("receiving file list");
1942         else if (inc_recurse && verbose && !am_server && !first_flist)
1943                 rprintf(FCLIENT, "receiving incremental file list\n");
1944
1945         start_read = stats.total_read;
1946
1947         flist = flist_new(0, "recv_file_list");
1948
1949 #ifdef SUPPORT_HARD_LINKS
1950         if (preserve_hard_links && protocol_version < 30)
1951                 init_hard_links();
1952 #endif
1953
1954         if (inc_recurse) {
1955                 if (flist->ndx_start == 0)
1956                         dir_flist = flist_new(FLIST_TEMP, "recv_file_list");
1957                 dstart = dir_flist->used;
1958         } else {
1959                 dir_flist = flist;
1960                 dstart = 0;
1961         }
1962
1963         while ((flags = read_byte(f)) != 0) {
1964                 struct file_struct *file;
1965
1966                 flist_expand(flist, 1);
1967
1968                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
1969                         flags |= read_byte(f) << 8;
1970                 file = recv_file_entry(flist, flags, f);
1971
1972                 if (inc_recurse && S_ISDIR(file->mode)) {
1973                         flist_expand(dir_flist, 1);
1974                         dir_flist->files[dir_flist->used++] = file;
1975                 }
1976
1977                 flist->files[flist->used++] = file;
1978
1979                 maybe_emit_filelist_progress(flist->used);
1980
1981                 if (verbose > 2) {
1982                         rprintf(FINFO, "recv_file_name(%s)\n",
1983                                 f_name(file, NULL));
1984                 }
1985         }
1986         file_total += flist->used;
1987
1988         flist->ndx_end = flist->ndx_start + flist->used - 1;
1989         if (inc_recurse && flist->ndx_start)
1990                 flist->ndx_end -= dir_flist->used - dstart;
1991
1992         if (verbose > 2)
1993                 rprintf(FINFO, "received %d names\n", flist->used);
1994
1995         if (show_filelist_p())
1996                 finish_filelist_progress(flist);
1997
1998 #ifdef ICONV_OPTION
1999         if (need_unsorted_flist) {
2000                 /* Create an extra array of index pointers that we can sort for
2001                  * the generator's use (for wading through the files in sorted
2002                  * order and for calling flist_find()).  We keep the "files"
2003                  * list unsorted for our exchange of index numbers with the
2004                  * other side (since their names may not sort the same). */
2005                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2006                         out_of_memory("recv_file_list");
2007                 memcpy(flist->sorted, flist->files,
2008                        flist->used * sizeof (struct file_struct*));
2009                 if (inc_recurse && dir_flist->used > dstart) {
2010                         dir_flist->sorted = realloc_array(dir_flist->sorted,
2011                                                 struct file_struct *,
2012                                                 dir_flist->used);
2013                         memcpy(dir_flist->sorted + dstart, dir_flist->files + dstart,
2014                                (dir_flist->used - dstart) * sizeof (struct file_struct*));
2015                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2016                 }
2017         } else
2018 #endif
2019         {
2020                 flist->sorted = flist->files;
2021                 if (inc_recurse && dir_flist->used > dstart) {
2022                         dir_flist->sorted = dir_flist->files;
2023                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2024                 }
2025         }
2026
2027         if (inc_recurse)
2028                 flist_done_allocating(flist);
2029         else if (f >= 0)
2030                 recv_id_list(f, flist);
2031
2032         clean_flist(flist, relative_paths);
2033
2034         if (protocol_version < 30) {
2035                 /* Recv the io_error flag */
2036                 if (ignore_errors)
2037                         read_int(f);
2038                 else
2039                         io_error |= read_int(f);
2040         }
2041
2042         if (verbose > 3)
2043                 output_flist(flist);
2044
2045         if (list_only) {
2046                 int i;
2047                 for (i = flist->low; i <= flist->high; i++)
2048                         list_file_entry(flist->files[i]);
2049         }
2050
2051         if (verbose > 2)
2052                 rprintf(FINFO, "recv_file_list done\n");
2053
2054         stats.flist_size += stats.total_read - start_read;
2055         stats.num_files += flist->used;
2056
2057         return flist;
2058 }
2059
2060 /* This is only used once by the receiver if the very first file-list
2061  * has exactly one item in it. */
2062 void recv_additional_file_list(int f)
2063 {
2064         struct file_list *flist;
2065         int ndx = read_ndx(f);
2066         if (ndx == NDX_FLIST_EOF) {
2067                 flist_eof = 1;
2068                 change_local_filter_dir(NULL, 0, 0);
2069         } else {
2070                 ndx = NDX_FLIST_OFFSET - ndx;
2071                 if (ndx < 0 || ndx >= dir_flist->used) {
2072                         ndx = NDX_FLIST_OFFSET - ndx;
2073                         rprintf(FERROR,
2074                                 "[%s] Invalid dir index: %d (%d - %d)\n",
2075                                 who_am_i(), ndx, NDX_FLIST_OFFSET,
2076                                 NDX_FLIST_OFFSET - dir_flist->used + 1);
2077                         exit_cleanup(RERR_PROTOCOL);
2078                 }
2079                 if (verbose > 3) {
2080                         rprintf(FINFO, "[%s] receiving flist for dir %d\n",
2081                                 who_am_i(), ndx);
2082                 }
2083                 flist = recv_file_list(f);
2084                 flist->parent_ndx = ndx;
2085         }
2086 }
2087
2088 /* Search for an identically-named item in the file list.  Note that the
2089  * items must agree in their directory-ness, or no match is returned. */
2090 int flist_find(struct file_list *flist, struct file_struct *f)
2091 {
2092         int low = flist->low, high = flist->high;
2093         int diff, mid, mid_up;
2094
2095         while (low <= high) {
2096                 mid = (low + high) / 2;
2097                 if (F_IS_ACTIVE(flist->sorted[mid]))
2098                         mid_up = mid;
2099                 else {
2100                         /* Scan for the next non-empty entry using the cached
2101                          * distance values.  If the value isn't fully up-to-
2102                          * date, update it. */
2103                         mid_up = mid + F_DEPTH(flist->sorted[mid]);
2104                         if (!F_IS_ACTIVE(flist->sorted[mid_up])) {
2105                                 do {
2106                                     mid_up += F_DEPTH(flist->sorted[mid_up]);
2107                                 } while (!F_IS_ACTIVE(flist->sorted[mid_up]));
2108                                 F_DEPTH(flist->sorted[mid]) = mid_up - mid;
2109                         }
2110                         if (mid_up > high) {
2111                                 /* If there's nothing left above us, set high to
2112                                  * a non-empty entry below us and continue. */
2113                                 high = mid - (int)flist->sorted[mid]->len32;
2114                                 if (!F_IS_ACTIVE(flist->sorted[high])) {
2115                                         do {
2116                                             high -= (int)flist->sorted[high]->len32;
2117                                         } while (!F_IS_ACTIVE(flist->sorted[high]));
2118                                         flist->sorted[mid]->len32 = mid - high;
2119                                 }
2120                                 continue;
2121                         }
2122                 }
2123                 diff = f_name_cmp(flist->sorted[mid_up], f);
2124                 if (diff == 0) {
2125                         if (protocol_version < 29
2126                             && S_ISDIR(flist->sorted[mid_up]->mode)
2127                             != S_ISDIR(f->mode))
2128                                 return -1;
2129                         return mid_up;
2130                 }
2131                 if (diff < 0)
2132                         low = mid_up + 1;
2133                 else
2134                         high = mid - 1;
2135         }
2136         return -1;
2137 }
2138
2139 /*
2140  * Free up any resources a file_struct has allocated
2141  * and clear the file.
2142  */
2143 void clear_file(struct file_struct *file)
2144 {
2145         /* The +1 zeros out the first char of the basename. */
2146         memset(file, 0, FILE_STRUCT_LEN + 1);
2147         /* In an empty entry, F_DEPTH() is an offset to the next non-empty
2148          * entry.  Likewise for len32 in the opposite direction.  We assume
2149          * that we're alone for now since flist_find() will adjust the counts
2150          * it runs into that aren't up-to-date. */
2151         file->len32 = F_DEPTH(file) = 1;
2152 }
2153
2154 /* Allocate a new file list. */
2155 struct file_list *flist_new(int flags, char *msg)
2156 {
2157         struct file_list *flist;
2158
2159         flist = new(struct file_list);
2160         if (!flist)
2161                 out_of_memory(msg);
2162
2163         memset(flist, 0, sizeof flist[0]);
2164
2165         if (flags & FLIST_TEMP) {
2166                 if (!(flist->file_pool = pool_create(SMALL_EXTENT, 0,
2167                                                 out_of_memory, POOL_INTERN)))
2168                         out_of_memory(msg);
2169         } else {
2170                 /* This is a doubly linked list with prev looping back to
2171                  * the end of the list, but the last next pointer is NULL. */
2172                 if (!first_flist) {
2173                         flist->file_pool = pool_create(NORMAL_EXTENT, 0,
2174                                                 out_of_memory, POOL_INTERN);
2175                         if (!flist->file_pool)
2176                                 out_of_memory(msg);
2177
2178                         first_flist = cur_flist = flist->prev = flist;
2179                 } else {
2180                         flist->file_pool = first_flist->file_pool;
2181
2182                         flist->ndx_start = first_flist->prev->ndx_end + 2;
2183
2184                         flist->prev = first_flist->prev;
2185                         flist->prev->next = first_flist->prev = flist;
2186                 }
2187                 flist->pool_boundary = pool_boundary(flist->file_pool, 0);
2188                 flist_cnt++;
2189         }
2190
2191         return flist;
2192 }
2193
2194 /* Free up all elements in a flist. */
2195 void flist_free(struct file_list *flist)
2196 {
2197         if (!flist->prev) {
2198                 /* Was FLIST_TEMP dir-list. */
2199         } else if (flist == flist->prev) {
2200                 first_flist = cur_flist = NULL;
2201                 file_total = 0;
2202                 flist_cnt = 0;
2203         } else {
2204                 if (flist == cur_flist)
2205                         cur_flist = flist->next;
2206                 if (flist == first_flist)
2207                         first_flist = first_flist->next;
2208                 else {
2209                         flist->prev->next = flist->next;
2210                         if (!flist->next)
2211                                 flist->next = first_flist;
2212                 }
2213                 flist->next->prev = flist->prev;
2214                 file_total -= flist->used;
2215                 flist_cnt--;
2216         }
2217
2218         if (!flist->prev || !flist_cnt)
2219                 pool_destroy(flist->file_pool);
2220         else
2221                 pool_free_old(flist->file_pool, flist->pool_boundary);
2222
2223         if (flist->sorted && flist->sorted != flist->files)
2224                 free(flist->sorted);
2225         free(flist->files);
2226         free(flist);
2227 }
2228
2229 /* This routine ensures we don't have any duplicate names in our file list.
2230  * duplicate names can cause corruption because of the pipelining. */
2231 static void clean_flist(struct file_list *flist, int strip_root)
2232 {
2233         char fbuf[MAXPATHLEN];
2234         int i, prev_i;
2235
2236         if (!flist)
2237                 return;
2238         if (flist->used == 0) {
2239                 flist->high = -1;
2240                 flist->low = 0;
2241                 return;
2242         }
2243
2244         fsort(flist->sorted, flist->used);
2245
2246         if (!am_sender || inc_recurse) {
2247                 for (i = prev_i = 0; i < flist->used; i++) {
2248                         if (F_IS_ACTIVE(flist->sorted[i])) {
2249                                 prev_i = i;
2250                                 break;
2251                         }
2252                 }
2253                 flist->low = prev_i;
2254         } else {
2255                 i = prev_i = flist->used - 1;
2256                 flist->low = 0;
2257         }
2258
2259         while (++i < flist->used) {
2260                 int j;
2261                 struct file_struct *file = flist->sorted[i];
2262
2263                 if (!F_IS_ACTIVE(file))
2264                         continue;
2265                 if (f_name_cmp(file, flist->sorted[prev_i]) == 0)
2266                         j = prev_i;
2267                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
2268                         int save_mode = file->mode;
2269                         /* Make sure that this directory doesn't duplicate a
2270                          * non-directory earlier in the list. */
2271                         flist->high = prev_i;
2272                         file->mode = S_IFREG;
2273                         j = flist_find(flist, file);
2274                         file->mode = save_mode;
2275                 } else
2276                         j = -1;
2277                 if (j >= 0) {
2278                         int keep, drop;
2279                         /* If one is a dir and the other is not, we want to
2280                          * keep the dir because it might have contents in the
2281                          * list. */
2282                         if (S_ISDIR(file->mode)) {
2283                                 struct file_struct *fp = flist->sorted[j];
2284                                 if (!S_ISDIR(fp->mode))
2285                                         keep = i, drop = j;
2286                                 else
2287                                         keep = j, drop = i;
2288                         } else
2289                                 keep = j, drop = i;
2290
2291                         if (am_sender)
2292                                 flist->sorted[drop]->flags |= FLAG_DUPLICATE;
2293                         else {
2294                                 if (verbose > 1) {
2295                                         rprintf(FINFO,
2296                                             "removing duplicate name %s from file list (%d)\n",
2297                                             f_name(file, fbuf), drop + flist->ndx_start);
2298                                 }
2299                                 /* Make sure we don't lose track of a user-specified
2300                                  * top directory. */
2301                                 flist->sorted[keep]->flags |= flist->sorted[drop]->flags
2302                                                            & (FLAG_TOP_DIR|FLAG_XFER_DIR);
2303
2304                                 clear_file(flist->sorted[drop]);
2305                         }
2306
2307                         if (keep == i) {
2308                                 if (flist->low == drop) {
2309                                         for (j = drop + 1;
2310                                              j < i && !F_IS_ACTIVE(flist->sorted[j]);
2311                                              j++) {}
2312                                         flist->low = j;
2313                                 }
2314                                 prev_i = i;
2315                         }
2316                 } else
2317                         prev_i = i;
2318         }
2319         flist->high = prev_i;
2320
2321         if (strip_root) {
2322                 /* We need to strip off the leading slashes for relative
2323                  * paths, but this must be done _after_ the sorting phase. */
2324                 for (i = flist->low; i <= flist->high; i++) {
2325                         struct file_struct *file = flist->sorted[i];
2326
2327                         if (!file->dirname)
2328                                 continue;
2329                         while (*file->dirname == '/')
2330                                 file->dirname++;
2331                         if (!*file->dirname)
2332                                 file->dirname = NULL;
2333                 }
2334         }
2335
2336         if (prune_empty_dirs && !am_sender) {
2337                 int j, prev_depth = 0;
2338
2339                 prev_i = 0; /* It's OK that this isn't really true. */
2340
2341                 for (i = flist->low; i <= flist->high; i++) {
2342                         struct file_struct *fp, *file = flist->sorted[i];
2343
2344                         /* This temporarily abuses the F_DEPTH() value for a
2345                          * directory that is in a chain that might get pruned.
2346                          * We restore the old value if it gets a reprieve. */
2347                         if (S_ISDIR(file->mode) && F_DEPTH(file)) {
2348                                 /* Dump empty dirs when coming back down. */
2349                                 for (j = prev_depth; j >= F_DEPTH(file); j--) {
2350                                         fp = flist->sorted[prev_i];
2351                                         if (F_DEPTH(fp) >= 0)
2352                                                 break;
2353                                         prev_i = -F_DEPTH(fp)-1;
2354                                         clear_file(fp);
2355                                 }
2356                                 prev_depth = F_DEPTH(file);
2357                                 if (is_excluded(f_name(file, fbuf), 1,
2358                                                        ALL_FILTERS)) {
2359                                         /* Keep dirs through this dir. */
2360                                         for (j = prev_depth-1; ; j--) {
2361                                                 fp = flist->sorted[prev_i];
2362                                                 if (F_DEPTH(fp) >= 0)
2363                                                         break;
2364                                                 prev_i = -F_DEPTH(fp)-1;
2365                                                 F_DEPTH(fp) = j;
2366                                         }
2367                                 } else
2368                                         F_DEPTH(file) = -prev_i-1;
2369                                 prev_i = i;
2370                         } else {
2371                                 /* Keep dirs through this non-dir. */
2372                                 for (j = prev_depth; ; j--) {
2373                                         fp = flist->sorted[prev_i];
2374                                         if (F_DEPTH(fp) >= 0)
2375                                                 break;
2376                                         prev_i = -F_DEPTH(fp)-1;
2377                                         F_DEPTH(fp) = j;
2378                                 }
2379                         }
2380                 }
2381                 /* Dump all remaining empty dirs. */
2382                 while (1) {
2383                         struct file_struct *fp = flist->sorted[prev_i];
2384                         if (F_DEPTH(fp) >= 0)
2385                                 break;
2386                         prev_i = -F_DEPTH(fp)-1;
2387                         clear_file(fp);
2388                 }
2389
2390                 for (i = flist->low; i <= flist->high; i++) {
2391                         if (F_IS_ACTIVE(flist->sorted[i]))
2392                                 break;
2393                 }
2394                 flist->low = i;
2395                 for (i = flist->high; i >= flist->low; i--) {
2396                         if (F_IS_ACTIVE(flist->sorted[i]))
2397                                 break;
2398                 }
2399                 flist->high = i;
2400         }
2401 }
2402
2403 static void output_flist(struct file_list *flist)
2404 {
2405         char uidbuf[16], gidbuf[16], depthbuf[16];
2406         struct file_struct *file;
2407         const char *root, *dir, *slash, *name, *trail;
2408         const char *who = who_am_i();
2409         int i;
2410
2411         rprintf(FINFO, "[%s] flist start=%d, end=%d, used=%d, low=%d, high=%d\n",
2412                 who, flist->ndx_start, flist->ndx_end, flist->used, flist->low, flist->high);
2413         for (i = 0; i < flist->used; i++) {
2414                 file = flist->sorted[i];
2415                 if ((am_root || am_sender) && uid_ndx) {
2416                         snprintf(uidbuf, sizeof uidbuf, " uid=%u",
2417                                  F_OWNER(file));
2418                 } else
2419                         *uidbuf = '\0';
2420                 if (gid_ndx) {
2421                         static char parens[] = "(\0)\0\0\0";
2422                         char *pp = parens + (file->flags & FLAG_SKIP_GROUP ? 0 : 3);
2423                         snprintf(gidbuf, sizeof gidbuf, " gid=%s%u%s",
2424                                  pp, F_GROUP(file), pp + 2);
2425                 } else
2426                         *gidbuf = '\0';
2427                 if (!am_sender)
2428                         snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file));
2429                 if (F_IS_ACTIVE(file)) {
2430                         root = am_sender ? NS(F_PATHNAME(file)) : depthbuf;
2431                         if ((dir = file->dirname) == NULL)
2432                                 dir = slash = "";
2433                         else
2434                                 slash = "/";
2435                         name = file->basename;
2436                         trail = S_ISDIR(file->mode) ? "/" : "";
2437                 } else
2438                         root = dir = slash = name = trail = "";
2439                 rprintf(FINFO,
2440                         "[%s] i=%d %s %s%s%s%s mode=0%o len=%.0f%s%s flags=%x\n",
2441                         who, i + flist->ndx_start,
2442                         root, dir, slash, name, trail,
2443                         (int)file->mode, (double)F_LENGTH(file),
2444                         uidbuf, gidbuf, file->flags);
2445         }
2446 }
2447
2448 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
2449 enum fnc_type { t_PATH, t_ITEM };
2450
2451 /* Compare the names of two file_struct entities, similar to how strcmp()
2452  * would do if it were operating on the joined strings.
2453  *
2454  * Some differences beginning with protocol_version 29: (1) directory names
2455  * are compared with an assumed trailing slash so that they compare in a
2456  * way that would cause them to sort immediately prior to any content they
2457  * may have; (2) a directory of any name compares after a non-directory of
2458  * any name at the same depth; (3) a directory with name "." compares prior
2459  * to anything else.  These changes mean that a directory and a non-dir
2460  * with the same name will not compare as equal (protocol_version >= 29).
2461  *
2462  * The dirname component can be an empty string, but the basename component
2463  * cannot (and never is in the current codebase).  The basename component
2464  * may be NULL (for a removed item), in which case it is considered to be
2465  * after any existing item. */
2466 int f_name_cmp(struct file_struct *f1, struct file_struct *f2)
2467 {
2468         int dif;
2469         const uchar *c1, *c2;
2470         enum fnc_state state1, state2;
2471         enum fnc_type type1, type2;
2472         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
2473
2474         if (!f1 || !F_IS_ACTIVE(f1)) {
2475                 if (!f2 || !F_IS_ACTIVE(f2))
2476                         return 0;
2477                 return -1;
2478         }
2479         if (!f2 || !F_IS_ACTIVE(f2))
2480                 return 1;
2481
2482         c1 = (uchar*)f1->dirname;
2483         c2 = (uchar*)f2->dirname;
2484         if (c1 == c2)
2485                 c1 = c2 = NULL;
2486         if (!c1) {
2487                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2488                 c1 = (const uchar*)f1->basename;
2489                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2490                         type1 = t_ITEM;
2491                         state1 = s_TRAILING;
2492                         c1 = (uchar*)"";
2493                 } else
2494                         state1 = s_BASE;
2495         } else {
2496                 type1 = t_path;
2497                 state1 = s_DIR;
2498         }
2499         if (!c2) {
2500                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2501                 c2 = (const uchar*)f2->basename;
2502                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2503                         type2 = t_ITEM;
2504                         state2 = s_TRAILING;
2505                         c2 = (uchar*)"";
2506                 } else
2507                         state2 = s_BASE;
2508         } else {
2509                 type2 = t_path;
2510                 state2 = s_DIR;
2511         }
2512
2513         if (type1 != type2)
2514                 return type1 == t_PATH ? 1 : -1;
2515
2516         do {
2517                 if (!*c1) {
2518                         switch (state1) {
2519                         case s_DIR:
2520                                 state1 = s_SLASH;
2521                                 c1 = (uchar*)"/";
2522                                 break;
2523                         case s_SLASH:
2524                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2525                                 c1 = (const uchar*)f1->basename;
2526                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2527                                         type1 = t_ITEM;
2528                                         state1 = s_TRAILING;
2529                                         c1 = (uchar*)"";
2530                                 } else
2531                                         state1 = s_BASE;
2532                                 break;
2533                         case s_BASE:
2534                                 state1 = s_TRAILING;
2535                                 if (type1 == t_PATH) {
2536                                         c1 = (uchar*)"/";
2537                                         break;
2538                                 }
2539                                 /* FALL THROUGH */
2540                         case s_TRAILING:
2541                                 type1 = t_ITEM;
2542                                 break;
2543                         }
2544                         if (*c2 && type1 != type2)
2545                                 return type1 == t_PATH ? 1 : -1;
2546                 }
2547                 if (!*c2) {
2548                         switch (state2) {
2549                         case s_DIR:
2550                                 state2 = s_SLASH;
2551                                 c2 = (uchar*)"/";
2552                                 break;
2553                         case s_SLASH:
2554                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2555                                 c2 = (const uchar*)f2->basename;
2556                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2557                                         type2 = t_ITEM;
2558                                         state2 = s_TRAILING;
2559                                         c2 = (uchar*)"";
2560                                 } else
2561                                         state2 = s_BASE;
2562                                 break;
2563                         case s_BASE:
2564                                 state2 = s_TRAILING;
2565                                 if (type2 == t_PATH) {
2566                                         c2 = (uchar*)"/";
2567                                         break;
2568                                 }
2569                                 /* FALL THROUGH */
2570                         case s_TRAILING:
2571                                 if (!*c1)
2572                                         return 0;
2573                                 type2 = t_ITEM;
2574                                 break;
2575                         }
2576                         if (type1 != type2)
2577                                 return type1 == t_PATH ? 1 : -1;
2578                 }
2579         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
2580
2581         return dif;
2582 }
2583
2584 char *f_name_buf(void)
2585 {
2586         static char names[5][MAXPATHLEN];
2587         static unsigned int n;
2588
2589         n = (n + 1) % (sizeof names / sizeof names[0]);
2590
2591         return names[n];
2592 }
2593
2594 /* Return a copy of the full filename of a flist entry, using the indicated
2595  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
2596  * done because we checked the size when creating the file_struct entry.
2597  */
2598 char *f_name(struct file_struct *f, char *fbuf)
2599 {
2600         if (!f || !F_IS_ACTIVE(f))
2601                 return NULL;
2602
2603         if (!fbuf)
2604                 fbuf = f_name_buf();
2605
2606         if (f->dirname) {
2607                 int len = strlen(f->dirname);
2608                 memcpy(fbuf, f->dirname, len);
2609                 fbuf[len] = '/';
2610                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
2611         } else
2612                 strlcpy(fbuf, f->basename, MAXPATHLEN);
2613
2614         return fbuf;
2615 }
2616
2617 /* Do a non-recursive scan of the named directory, possibly ignoring all
2618  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
2619  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
2620  * buffer (the functions we call will append names onto the end, but the old
2621  * dir value will be restored on exit). */
2622 struct file_list *get_dirlist(char *dirname, int dlen, int ignore_filter_rules)
2623 {
2624         struct file_list *dirlist;
2625         char dirbuf[MAXPATHLEN];
2626         int save_recurse = recurse;
2627         int save_xfer_dirs = xfer_dirs;
2628         int save_prune_empty_dirs = prune_empty_dirs;
2629
2630         if (dlen < 0) {
2631                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
2632                 if (dlen >= MAXPATHLEN)
2633                         return NULL;
2634                 dirname = dirbuf;
2635         }
2636
2637         dirlist = flist_new(FLIST_TEMP, "get_dirlist");
2638
2639         recurse = 0;
2640         xfer_dirs = 1;
2641         send_directory(ignore_filter_rules ? -2 : -1, dirlist, dirname, dlen, 0);
2642         xfer_dirs = save_xfer_dirs;
2643         recurse = save_recurse;
2644         if (do_progress)
2645                 flist_count_offset += dirlist->used;
2646
2647         prune_empty_dirs = 0;
2648         dirlist->sorted = dirlist->files;
2649         clean_flist(dirlist, 0);
2650         prune_empty_dirs = save_prune_empty_dirs;
2651
2652         if (verbose > 3)
2653                 output_flist(dirlist);
2654
2655         return dirlist;
2656 }