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 2 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, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
  21  */
  22
  23 #include "rsync.h"
  24 #include "rounding.h"
  25 #include "io.h"
  26
  27 extern int verbose;
  28 extern int list_only;
  29 extern int am_root;
  30 extern int am_server;
  31 extern int am_daemon;
  32 extern int am_sender;
  33 extern int am_generator;
  34 extern int inc_recurse;
  35 extern int do_progress;
  36 extern int always_checksum;
  37 extern int module_id;
  38 extern int ignore_errors;
  39 extern int numeric_ids;
  40 extern int recurse;
  41 extern int 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 preserve_uid;
  53 extern int preserve_gid;
  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 int io_error;
  80 int checksum_len;
  81 dev_t filesystem_dev; /* used to implement -x */
  82
  83 struct file_list *cur_flist, *first_flist, *dir_flist;
  84 int send_dir_ndx = -1, send_dir_depth = 0;
  85 int flist_cnt = 0; /* how many (non-tmp) file list objects exist */
  86 int file_total = 0; /* total of all active items over all file-lists */
  87 int flist_eof = 0; /* all the file-lists are now known */
  88
  89 /* The tmp_* vars are used as a cache area by make_file() to store data
  90  * that the sender doesn't need to remember in its file list.  The data
  91  * will survive just long enough to be used by send_file_entry(). */
  92 static dev_t tmp_rdev;
  93 #ifdef SUPPORT_HARD_LINKS
  94 static int64 tmp_dev, tmp_ino;
  95 #endif
  96 static char tmp_sum[MAX_DIGEST_LEN];
  97
  98 static char empty_sum[MAX_DIGEST_LEN];
  99 static int flist_count_offset; /* for --delete --progress */
 100
 101 static void clean_flist(struct file_list *flist, int strip_root);
 102 static void output_flist(struct file_list *flist);
 103
 104 void init_flist(void)
 105 {
 106         if (verbose > 4) {
 107                 rprintf(FINFO, "FILE_STRUCT_LEN=%d, EXTRA_LEN=%d\n",
 108                         (int)FILE_STRUCT_LEN, (int)EXTRA_LEN);
 109         }
 110         checksum_len = protocol_version < 21 ? 2
 111                      : protocol_version < 30 ? MD4_DIGEST_LEN
 112                      : MD5_DIGEST_LEN;
 113 }
 114
 115 static int show_filelist_p(void)
 116 {
 117         return verbose && xfer_dirs && !am_server && !inc_recurse;
 118 }
 119
 120 static void start_filelist_progress(char *kind)
 121 {
 122         rprintf(FCLIENT, "%s ... ", kind);
 123         if (verbose > 1 || do_progress)
 124                 rprintf(FCLIENT, "\n");
 125         rflush(FINFO);
 126 }
 127
 128 static void emit_filelist_progress(int count)
 129 {
 130         rprintf(FCLIENT, " %d files...\r", count);
 131 }
 132
 133 static void maybe_emit_filelist_progress(int count)
 134 {
 135         if (do_progress && show_filelist_p() && (count % 100) == 0)
 136                 emit_filelist_progress(count);
 137 }
 138
 139 static void finish_filelist_progress(const struct file_list *flist)
 140 {
 141         if (do_progress) {
 142                 /* This overwrites the progress line */
 143                 rprintf(FINFO, "%d file%sto consider\n",
 144                         flist->count, flist->count == 1 ? " " : "s ");
 145         } else
 146                 rprintf(FINFO, "done\n");
 147 }
 148
 149 void show_flist_stats(void)
 150 {
 151         /* Nothing yet */
 152 }
 153
 154 static void list_file_entry(struct file_struct *f)
 155 {
 156         char permbuf[PERMSTRING_SIZE];
 157         double len;
 158
 159         if (!F_IS_ACTIVE(f)) {
 160                 /* this can happen if duplicate names were removed */
 161                 return;
 162         }
 163
 164         permstring(permbuf, f->mode);
 165         len = F_LENGTH(f);
 166
 167         /* TODO: indicate '+' if the entry has an ACL. */
 168
 169 #ifdef SUPPORT_LINKS
 170         if (preserve_links && S_ISLNK(f->mode)) {
 171                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
 172                         permbuf, len, timestring(f->modtime),
 173                         f_name(f, NULL), F_SYMLINK(f));
 174         } else
 175 #endif
 176         {
 177                 rprintf(FINFO, "%s %11.0f %s %s\n",
 178                         permbuf, len, timestring(f->modtime),
 179                         f_name(f, NULL));
 180         }
 181 }
 182
 183 /* Stat either a symlink or its referent, depending on the settings of
 184  * copy_links, copy_unsafe_links, etc.  Returns -1 on error, 0 on success.
 185  *
 186  * If path is the name of a symlink, then the linkbuf buffer (which must hold
 187  * MAXPATHLEN chars) will be set to the symlink's target string.
 188  *
 189  * The stat structure pointed to by stp will contain information about the
 190  * link or the referent as appropriate, if they exist. */
 191 static int readlink_stat(const char *path, STRUCT_STAT *stp, char *linkbuf)
 192 {
 193 #ifdef SUPPORT_LINKS
 194         if (link_stat(path, stp, copy_dirlinks) < 0)
 195                 return -1;
 196         if (S_ISLNK(stp->st_mode)) {
 197                 int llen = readlink(path, linkbuf, MAXPATHLEN - 1);
 198                 if (llen < 0)
 199                         return -1;
 200                 linkbuf[llen] = '\0';
 201                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 202                         if (verbose > 1) {
 203                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 204                                         path, linkbuf);
 205                         }
 206                         return x_stat(path, stp, NULL);
 207                 }
 208         }
 209         return 0;
 210 #else
 211         return x_stat(path, stp, NULL);
 212 #endif
 213 }
 214
 215 int link_stat(const char *path, STRUCT_STAT *stp, int follow_dirlinks)
 216 {
 217 #ifdef SUPPORT_LINKS
 218         if (copy_links)
 219                 return x_stat(path, stp, NULL);
 220         if (x_lstat(path, stp, NULL) < 0)
 221                 return -1;
 222         if (follow_dirlinks && S_ISLNK(stp->st_mode)) {
 223                 STRUCT_STAT st;
 224                 if (x_stat(path, &st, NULL) == 0 && S_ISDIR(st.st_mode))
 225                         *stp = st;
 226         }
 227         return 0;
 228 #else
 229         return x_stat(path, stp, NULL);
 230 #endif
 231 }
 232
 233 /* This function is used to check if a file should be included/excluded
 234  * from the list of files based on its name and type etc.  The value of
 235  * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
 236 static int is_excluded(char *fname, int is_dir, int filter_level)
 237 {
 238 #if 0 /* This currently never happens, so avoid a useless compare. */
 239         if (filter_level == NO_FILTERS)
 240                 return 0;
 241 #endif
 242         if (fname) {
 243                 /* never exclude '.', even if somebody does --exclude '*' */
 244                 if (fname[0] == '.' && !fname[1])
 245                         return 0;
 246                 /* Handle the -R version of the '.' dir. */
 247                 if (fname[0] == '/') {
 248                         int len = strlen(fname);
 249                         if (fname[len-1] == '.' && fname[len-2] == '/')
 250                                 return 0;
 251                 }
 252         }
 253         if (server_filter_list.head
 254             && check_filter(&server_filter_list, fname, is_dir) < 0)
 255                 return 1;
 256         if (filter_level != ALL_FILTERS)
 257                 return 0;
 258         if (filter_list.head
 259             && check_filter(&filter_list, fname, is_dir) < 0)
 260                 return 1;
 261         return 0;
 262 }
 263
 264 static void send_directory(int f, struct file_list *flist,
 265                            char *fbuf, int len, int flags);
 266
 267 static const char *pathname, *orig_dir;
 268 static int pathname_len;
 269
 270
 271 /**
 272  * Make sure @p flist is big enough to hold at least @p flist->count
 273  * entries.
 274  **/
 275 void flist_expand(struct file_list *flist)
 276 {
 277         struct file_struct **new_ptr;
 278
 279         if (flist->count < 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->count)
 292                 flist->malloced = flist->count;
 293
 294 #ifdef ICONV_OPTION
 295         if (inc_recurse && flist == dir_flist && need_unsorted_flist) {
 296                 flist->sorted = realloc_array(flist->sorted, struct file_struct *,
 297                                               flist->malloced);
 298         }
 299 #endif
 300
 301         new_ptr = realloc_array(flist->files, struct file_struct *,
 302                                 flist->malloced);
 303
 304         if (verbose >= 2 && flist->malloced != FLIST_START) {
 305                 rprintf(FCLIENT, "[%s] expand file_list to %.0f bytes, did%s move\n",
 306                     who_am_i(),
 307                     (double)sizeof flist->files[0] * flist->malloced,
 308                     (new_ptr == flist->files) ? " not" : "");
 309         }
 310
 311         flist->files = new_ptr;
 312
 313         if (!flist->files)
 314                 out_of_memory("flist_expand");
 315 }
 316
 317 int push_pathname(const char *dir, int len)
 318 {
 319         if (dir == pathname)
 320                 return 1;
 321
 322         if (!orig_dir)
 323                 orig_dir = strdup(curr_dir);
 324
 325         if (pathname && !pop_dir(orig_dir)) {
 326                 rsyserr(FERROR, errno, "pop_dir %s failed",
 327                         full_fname(orig_dir));
 328                 exit_cleanup(RERR_FILESELECT);
 329         }
 330
 331         if (dir && !push_dir(dir, 0)) {
 332                 io_error |= IOERR_GENERAL;
 333                 rsyserr(FERROR, errno, "push_dir %s failed in %s",
 334                         full_fname(dir), curr_dir);
 335                 return 0;
 336         }
 337
 338         pathname = dir;
 339         pathname_len = len >= 0 ? len : dir ? (int)strlen(dir) : 0;
 340
 341         return 1;
 342 }
 343
 344 static void send_file_entry(int f, struct file_struct *file, int ndx)
 345 {
 346         static time_t modtime;
 347         static mode_t mode;
 348         static int64 dev;
 349         static dev_t rdev;
 350         static uint32 rdev_major;
 351         static uid_t uid;
 352         static gid_t gid;
 353         static char *user_name, *group_name;
 354         static char lastname[MAXPATHLEN];
 355         char fname[MAXPATHLEN];
 356         int first_hlink_ndx = -1;
 357         int l1, l2;
 358         int flags;
 359
 360 #ifdef ICONV_OPTION
 361         if (ic_send != (iconv_t)-1) {
 362                 ICONV_CONST char *ibuf;
 363                 char *obuf = fname;
 364                 size_t ocnt = MAXPATHLEN, icnt;
 365
 366                 iconv(ic_send, NULL,0, NULL,0);
 367                 if ((ibuf = (ICONV_CONST char *)file->dirname) != NULL) {
 368                     icnt = strlen(ibuf);
 369                     ocnt--; /* pre-subtract the space for the '/' */
 370                     if (iconv(ic_send, &ibuf,&icnt, &obuf,&ocnt) == (size_t)-1)
 371                         goto convert_error;
 372                     *obuf++ = '/';
 373                 }
 374
 375                 ibuf = (ICONV_CONST char *)file->basename;
 376                 icnt = strlen(ibuf);
 377                 if (iconv(ic_send, &ibuf,&icnt, &obuf,&ocnt) == (size_t)-1) {
 378                   convert_error:
 379                         io_error |= IOERR_GENERAL;
 380                         rprintf(FINFO,
 381                             "[%s] cannot convert filename: %s (%s)\n",
 382                             who_am_i(), f_name(file, fname), strerror(errno));
 383                         return;
 384                 }
 385                 *obuf = '\0';
 386         } else
 387 #endif
 388                 f_name(file, fname);
 389
 390         flags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */
 391
 392         if (file->mode == mode)
 393                 flags |= XMIT_SAME_MODE;
 394         else
 395                 mode = file->mode;
 396         if ((preserve_devices && IS_DEVICE(mode))
 397          || (preserve_specials && IS_SPECIAL(mode))) {
 398                 if (protocol_version < 28) {
 399                         if (tmp_rdev == rdev)
 400                                 flags |= XMIT_SAME_RDEV_pre28;
 401                         else
 402                                 rdev = tmp_rdev;
 403                 } else {
 404                         rdev = tmp_rdev;
 405                         if ((uint32)major(rdev) == rdev_major)
 406                                 flags |= XMIT_SAME_RDEV_MAJOR;
 407                         else
 408                                 rdev_major = major(rdev);
 409                         if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu)
 410                                 flags |= XMIT_RDEV_MINOR_8_pre30;
 411                 }
 412         } else if (protocol_version < 28)
 413                 rdev = MAKEDEV(0, 0);
 414         if (preserve_uid) {
 415                 if ((uid_t)F_OWNER(file) == uid && *lastname)
 416                         flags |= XMIT_SAME_UID;
 417                 else {
 418                         uid = F_OWNER(file);
 419                         if (preserve_uid && !numeric_ids) {
 420                                 user_name = add_uid(uid);
 421                                 if (inc_recurse && user_name)
 422                                         flags |= XMIT_USER_NAME_FOLLOWS;
 423                         }
 424                 }
 425         }
 426         if (preserve_gid) {
 427                 if ((gid_t)F_GROUP(file) == gid && *lastname)
 428                         flags |= XMIT_SAME_GID;
 429                 else {
 430                         gid = F_GROUP(file);
 431                         if (preserve_gid && !numeric_ids) {
 432                                 group_name = add_gid(gid);
 433                                 if (inc_recurse && group_name)
 434                                         flags |= XMIT_GROUP_NAME_FOLLOWS;
 435                         }
 436                 }
 437         }
 438         if (file->modtime == modtime)
 439                 flags |= XMIT_SAME_TIME;
 440         else
 441                 modtime = file->modtime;
 442
 443 #ifdef SUPPORT_HARD_LINKS
 444         if (tmp_dev != 0) {
 445                 if (protocol_version >= 30) {
 446                         struct idev_node *np = idev_node(tmp_dev, tmp_ino);
 447                         first_hlink_ndx = (int32)(long)np->data - 1;
 448                         if (first_hlink_ndx < 0) {
 449                                 np->data = (void*)(long)(ndx + 1);
 450                                 flags |= XMIT_HLINK_FIRST;
 451                         }
 452                         flags |= XMIT_HLINKED;
 453                 } else {
 454                         if (tmp_dev == dev) {
 455                                 if (protocol_version >= 28)
 456                                         flags |= XMIT_SAME_DEV_pre30;
 457                         } else
 458                                 dev = tmp_dev;
 459                         flags |= XMIT_HLINKED;
 460                 }
 461         }
 462 #endif
 463
 464         for (l1 = 0;
 465             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 466             l1++) {}
 467         l2 = strlen(fname+l1);
 468
 469         if (l1 > 0)
 470                 flags |= XMIT_SAME_NAME;
 471         if (l2 > 255)
 472                 flags |= XMIT_LONG_NAME;
 473
 474         /* We must make sure we don't send a zero flag byte or the
 475          * other end will terminate the flist transfer.  Note that
 476          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 477          * it's harmless way to add a bit to the first flag byte. */
 478         if (protocol_version >= 28) {
 479                 if (!flags && !S_ISDIR(mode))
 480                         flags |= XMIT_TOP_DIR;
 481                 if ((flags & 0xFF00) || !flags) {
 482                         flags |= XMIT_EXTENDED_FLAGS;
 483                         write_shortint(f, flags);
 484                 } else
 485                         write_byte(f, flags);
 486         } else {
 487                 if (!(flags & 0xFF))
 488                         flags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
 489                 write_byte(f, flags);
 490         }
 491         if (flags & XMIT_SAME_NAME)
 492                 write_byte(f, l1);
 493         if (flags & XMIT_LONG_NAME)
 494                 write_varint30(f, l2);
 495         else
 496                 write_byte(f, l2);
 497         write_buf(f, fname + l1, l2);
 498
 499         if (first_hlink_ndx >= 0) {
 500                 write_varint30(f, first_hlink_ndx);
 501                 goto the_end;
 502         }
 503
 504         write_varlong30(f, F_LENGTH(file), 3);
 505         if (!(flags & XMIT_SAME_TIME)) {
 506                 if (protocol_version >= 30)
 507                         write_varlong(f, modtime, 4);
 508                 else
 509                         write_int(f, modtime);
 510         }
 511         if (!(flags & XMIT_SAME_MODE))
 512                 write_int(f, to_wire_mode(mode));
 513         if (preserve_uid && !(flags & XMIT_SAME_UID)) {
 514                 if (protocol_version < 30)
 515                         write_int(f, uid);
 516                 else {
 517                         write_varint(f, uid);
 518                         if (flags & XMIT_USER_NAME_FOLLOWS) {
 519                                 int len = strlen(user_name);
 520                                 write_byte(f, len);
 521                                 write_buf(f, user_name, len);
 522                         }
 523                 }
 524         }
 525         if (preserve_gid && !(flags & XMIT_SAME_GID)) {
 526                 if (protocol_version < 30)
 527                         write_int(f, gid);
 528                 else {
 529                         write_varint(f, gid);
 530                         if (flags & XMIT_GROUP_NAME_FOLLOWS) {
 531                                 int len = strlen(group_name);
 532                                 write_byte(f, len);
 533                                 write_buf(f, group_name, len);
 534                         }
 535                 }
 536         }
 537         if ((preserve_devices && IS_DEVICE(mode))
 538          || (preserve_specials && IS_SPECIAL(mode))) {
 539                 if (protocol_version < 28) {
 540                         if (!(flags & XMIT_SAME_RDEV_pre28))
 541                                 write_int(f, (int)rdev);
 542                 } else {
 543                         if (!(flags & XMIT_SAME_RDEV_MAJOR))
 544                                 write_varint30(f, major(rdev));
 545                         if (protocol_version >= 30)
 546                                 write_varint(f, minor(rdev));
 547                         else if (flags & XMIT_RDEV_MINOR_8_pre30)
 548                                 write_byte(f, minor(rdev));
 549                         else
 550                                 write_int(f, minor(rdev));
 551                 }
 552         }
 553
 554 #ifdef SUPPORT_LINKS
 555         if (preserve_links && S_ISLNK(mode)) {
 556                 const char *sl = F_SYMLINK(file);
 557                 int len = strlen(sl);
 558                 write_varint30(f, len);
 559                 write_buf(f, sl, len);
 560         }
 561 #endif
 562
 563 #ifdef SUPPORT_HARD_LINKS
 564         if (tmp_dev != 0 && protocol_version < 30) {
 565                 if (protocol_version < 26) {
 566                         /* 32-bit dev_t and ino_t */
 567                         write_int(f, (int32)dev);
 568                         write_int(f, (int32)tmp_ino);
 569                 } else {
 570                         /* 64-bit dev_t and ino_t */
 571                         if (!(flags & XMIT_SAME_DEV_pre30))
 572                                 write_longint(f, dev);
 573                         write_longint(f, tmp_ino);
 574                 }
 575         }
 576 #endif
 577
 578         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 579                 const char *sum;
 580                 if (S_ISREG(mode))
 581                         sum = tmp_sum;
 582                 else {
 583                         /* Prior to 28, we sent a useless set of nulls. */
 584                         sum = empty_sum;
 585                 }
 586                 write_buf(f, sum, checksum_len);
 587         }
 588
 589   the_end:
 590         strlcpy(lastname, fname, MAXPATHLEN);
 591
 592         if (S_ISREG(mode) || S_ISLNK(mode))
 593                 stats.total_size += F_LENGTH(file);
 594 }
 595
 596 static struct file_struct *recv_file_entry(struct file_list *flist,
 597                                            int xflags, int f)
 598 {
 599         static int64 modtime;
 600         static mode_t mode;
 601         static int64 dev;
 602         static dev_t rdev;
 603         static uint32 rdev_major;
 604         static uid_t uid;
 605         static gid_t gid;
 606         static uint16 gid_flags;
 607         static char lastname[MAXPATHLEN], *lastdir;
 608         static int lastdir_depth, lastdir_len = -1;
 609         static unsigned int del_hier_name_len = 0;
 610         static int in_del_hier = 0;
 611         char thisname[MAXPATHLEN];
 612         unsigned int l1 = 0, l2 = 0;
 613         int alloc_len, basename_len, linkname_len;
 614         int extra_len = file_extra_cnt * EXTRA_LEN;
 615         int first_hlink_ndx = -1;
 616         OFF_T file_length;
 617         const char *basename;
 618         struct file_struct *file;
 619         alloc_pool_t *pool;
 620         char *bp;
 621
 622         if (xflags & XMIT_SAME_NAME)
 623                 l1 = read_byte(f);
 624
 625         if (xflags & XMIT_LONG_NAME)
 626                 l2 = read_varint30(f);
 627         else
 628                 l2 = read_byte(f);
 629
 630         if (l2 >= MAXPATHLEN - l1) {
 631                 rprintf(FERROR,
 632                         "overflow: xflags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
 633                         xflags, l1, l2, lastname, who_am_i());
 634                 overflow_exit("recv_file_entry");
 635         }
 636
 637         strlcpy(thisname, lastname, l1 + 1);
 638         read_sbuf(f, &thisname[l1], l2);
 639         thisname[l1 + l2] = 0;
 640
 641         /* Abuse basename_len for a moment... */
 642         basename_len = strlcpy(lastname, thisname, MAXPATHLEN);
 643
 644 #ifdef ICONV_OPTION
 645         if (ic_recv != (iconv_t)-1) {
 646                 char *obuf = thisname;
 647                 ICONV_CONST char *ibuf = (ICONV_CONST char *)lastname;
 648                 size_t ocnt = MAXPATHLEN, icnt = basename_len;
 649
 650                 if (icnt >= MAXPATHLEN) {
 651                         errno = E2BIG;
 652                         goto convert_error;
 653                 }
 654
 655                 iconv(ic_recv, NULL,0, NULL,0);
 656                 if (iconv(ic_recv, &ibuf,&icnt, &obuf,&ocnt) == (size_t)-1) {
 657                   convert_error:
 658                         io_error |= IOERR_GENERAL;
 659                         rprintf(FINFO,
 660                             "[%s] cannot convert filename: %s (%s)\n",
 661                             who_am_i(), lastname, strerror(errno));
 662                         obuf = thisname;
 663                 }
 664                 *obuf = '\0';
 665         }
 666 #endif
 667
 668         clean_fname(thisname, 0);
 669
 670         if (sanitize_paths)
 671                 sanitize_path(thisname, thisname, "", 0, NULL);
 672
 673         if ((basename = strrchr(thisname, '/')) != NULL) {
 674                 int len = basename++ - thisname;
 675                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
 676                         lastdir = new_array(char, len + 1);
 677                         memcpy(lastdir, thisname, len);
 678                         lastdir[len] = '\0';
 679                         lastdir_len = len;
 680                         lastdir_depth = count_dir_elements(lastdir);
 681                 }
 682         } else
 683                 basename = thisname;
 684         basename_len = strlen(basename) + 1; /* count the '\0' */
 685
 686 #ifdef SUPPORT_HARD_LINKS
 687         if (protocol_version >= 30
 688          && BITS_SETnUNSET(xflags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
 689                 struct file_struct *first;
 690                 first_hlink_ndx = read_varint30(f);
 691                 if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->count) {
 692                         rprintf(FERROR,
 693                                 "hard-link reference out of range: %d (%d)\n",
 694                                 first_hlink_ndx, flist->count);
 695                         exit_cleanup(RERR_PROTOCOL);
 696                 }
 697                 first = flist->files[first_hlink_ndx];
 698                 file_length = F_LENGTH(first);
 699                 modtime = first->modtime;
 700                 mode = first->mode;
 701                 if (preserve_uid)
 702                         uid = F_OWNER(first);
 703                 if (preserve_gid)
 704                         gid = F_GROUP(first);
 705                 if ((preserve_devices && IS_DEVICE(mode))
 706                  || (preserve_specials && IS_SPECIAL(mode))) {
 707                         uint32 *devp = F_RDEV_P(first);
 708                         rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
 709                         extra_len += 2 * EXTRA_LEN;
 710                 }
 711                 if (preserve_links && S_ISLNK(mode))
 712                         linkname_len = strlen(F_SYMLINK(first)) + 1;
 713                 else
 714                         linkname_len = 0;
 715                 goto create_object;
 716         }
 717 #endif
 718
 719         file_length = read_varlong30(f, 3);
 720         if (!(xflags & XMIT_SAME_TIME)) {
 721                 if (protocol_version >= 30) {
 722                         modtime = read_varlong(f, 4);
 723 #if SIZEOF_TIME_T < SIZEOF_INT64
 724                         if ((modtime > INT_MAX || modtime < INT_MIN) && !am_generator) {
 725                                 rprintf(FERROR,
 726                                     "Time value of %s truncated on receiver.\n",
 727                                     lastname);
 728                         }
 729 #endif
 730                 } else
 731                         modtime = read_int(f);
 732         }
 733         if (!(xflags & XMIT_SAME_MODE))
 734                 mode = from_wire_mode(read_int(f));
 735
 736         if (chmod_modes && !S_ISLNK(mode))
 737                 mode = tweak_mode(mode, chmod_modes);
 738
 739         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
 740                 if (protocol_version < 30)
 741                         uid = (uid_t)read_int(f);
 742                 else {
 743                         uid = (uid_t)read_varint(f);
 744                         if (xflags & XMIT_USER_NAME_FOLLOWS)
 745                                 uid = recv_user_name(f, uid);
 746                         else if (inc_recurse && am_root && !numeric_ids)
 747                                 uid = match_uid(uid);
 748                 }
 749         }
 750         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
 751                 if (protocol_version < 30)
 752                         gid = (gid_t)read_int(f);
 753                 else {
 754                         gid = (gid_t)read_varint(f);
 755                         gid_flags = 0;
 756                         if (xflags & XMIT_GROUP_NAME_FOLLOWS)
 757                                 gid = recv_group_name(f, gid, &gid_flags);
 758                         else if (inc_recurse && (!am_root || !numeric_ids))
 759                                 gid = match_gid(gid, &gid_flags);
 760                 }
 761         }
 762
 763         if ((preserve_devices && IS_DEVICE(mode))
 764          || (preserve_specials && IS_SPECIAL(mode))) {
 765                 if (protocol_version < 28) {
 766                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 767                                 rdev = (dev_t)read_int(f);
 768                 } else {
 769                         uint32 rdev_minor;
 770                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 771                                 rdev_major = read_varint30(f);
 772                         if (protocol_version >= 30)
 773                                 rdev_minor = read_varint(f);
 774                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 775                                 rdev_minor = read_byte(f);
 776                         else
 777                                 rdev_minor = read_int(f);
 778                         rdev = MAKEDEV(rdev_major, rdev_minor);
 779                 }
 780                 extra_len += 2 * EXTRA_LEN;
 781                 file_length = 0;
 782         } else if (protocol_version < 28)
 783                 rdev = MAKEDEV(0, 0);
 784
 785 #ifdef SUPPORT_LINKS
 786         if (preserve_links && S_ISLNK(mode)) {
 787                 linkname_len = read_varint30(f) + 1; /* count the '\0' */
 788                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 789                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 790                                 linkname_len - 1);
 791                         overflow_exit("recv_file_entry");
 792                 }
 793         }
 794         else
 795 #endif
 796                 linkname_len = 0;
 797
 798 #ifdef SUPPORT_HARD_LINKS
 799   create_object:
 800         if (preserve_hard_links) {
 801                 if (protocol_version < 28 && S_ISREG(mode))
 802                         xflags |= XMIT_HLINKED;
 803                 if (xflags & XMIT_HLINKED)
 804                         extra_len += EXTRA_LEN;
 805         }
 806 #endif
 807
 808 #ifdef SUPPORT_ACLS
 809         /* We need one or two index int32s when we're preserving ACLs. */
 810         if (preserve_acls)
 811                 extra_len += (S_ISDIR(mode) ? 2 : 1) * EXTRA_LEN;
 812 #endif
 813
 814         if (always_checksum && S_ISREG(mode))
 815                 extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
 816
 817         if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
 818                 extra_len += EXTRA_LEN;
 819
 820 #if EXTRA_ROUNDING > 0
 821         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
 822                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
 823 #endif
 824
 825         if (inc_recurse && S_ISDIR(mode)) {
 826                 if (one_file_system) {
 827                         /* Room to save the dir's device for -x */
 828                         extra_len += 2 * EXTRA_LEN;
 829                 }
 830                 pool = dir_flist->file_pool;
 831         } else
 832                 pool = flist->file_pool;
 833
 834         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
 835                   + linkname_len;
 836         bp = pool_alloc(pool, alloc_len, "recv_file_entry");
 837
 838         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
 839         bp += extra_len;
 840         file = (struct file_struct *)bp;
 841         bp += FILE_STRUCT_LEN;
 842
 843         memcpy(bp, basename, basename_len);
 844         bp += basename_len + linkname_len; /* skip space for symlink too */
 845
 846 #ifdef SUPPORT_HARD_LINKS
 847         if (xflags & XMIT_HLINKED)
 848                 file->flags |= FLAG_HLINKED;
 849 #endif
 850         file->modtime = (time_t)modtime;
 851         file->len32 = (uint32)file_length;
 852         if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
 853                 file->flags |= FLAG_LENGTH64;
 854                 OPT_EXTRA(file, 0)->unum = (uint32)(file_length >> 32);
 855         }
 856         file->mode = mode;
 857         if (preserve_uid)
 858                 F_OWNER(file) = uid;
 859         if (preserve_gid) {
 860                 F_GROUP(file) = gid;
 861                 file->flags |= gid_flags;
 862         }
 863 #ifdef ICONV_OPTION
 864         if (ic_ndx)
 865                 F_NDX(file) = flist->count + flist->ndx_start;
 866 #endif
 867
 868         if (basename != thisname) {
 869                 file->dirname = lastdir;
 870                 F_DEPTH(file) = lastdir_depth + 1;
 871         } else
 872                 F_DEPTH(file) = 1;
 873
 874         if (S_ISDIR(mode)) {
 875                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
 876                         F_DEPTH(file)--;
 877                 if (xflags & XMIT_TOP_DIR) {
 878                         in_del_hier = recurse;
 879                         del_hier_name_len = F_DEPTH(file) == 0 ? 0 : l1 + l2;
 880                         if (relative_paths && del_hier_name_len > 2
 881                             && lastname[del_hier_name_len-1] == '.'
 882                             && lastname[del_hier_name_len-2] == '/')
 883                                 del_hier_name_len -= 2;
 884                         file->flags |= FLAG_TOP_DIR | FLAG_XFER_DIR;
 885                 } else if (in_del_hier) {
 886                         if (!relative_paths || !del_hier_name_len
 887                          || (l1 >= del_hier_name_len
 888                           && lastname[del_hier_name_len] == '/'))
 889                                 file->flags |= FLAG_XFER_DIR;
 890                         else
 891                                 in_del_hier = 0;
 892                 }
 893         }
 894
 895         if ((preserve_devices && IS_DEVICE(mode))
 896          || (preserve_specials && IS_SPECIAL(mode))) {
 897                 uint32 *devp = F_RDEV_P(file);
 898                 DEV_MAJOR(devp) = major(rdev);
 899                 DEV_MINOR(devp) = minor(rdev);
 900         }
 901
 902 #ifdef SUPPORT_LINKS
 903         if (linkname_len) {
 904                 bp = (char*)file->basename + basename_len;
 905                 if (first_hlink_ndx >= 0) {
 906                         struct file_struct *first = flist->files[first_hlink_ndx];
 907                         memcpy(bp, F_SYMLINK(first), linkname_len);
 908                 } else
 909                         read_sbuf(f, bp, linkname_len - 1);
 910                 if (sanitize_paths)
 911                         sanitize_path(bp, bp, "", lastdir_depth, NULL);
 912         }
 913 #endif
 914
 915 #ifdef SUPPORT_HARD_LINKS
 916         if (preserve_hard_links && xflags & XMIT_HLINKED) {
 917                 if (protocol_version >= 30) {
 918                         F_HL_GNUM(file) = xflags & XMIT_HLINK_FIRST
 919                                         ? flist->count : first_hlink_ndx;
 920                 } else {
 921                         static int32 cnt = 0;
 922                         struct idev_node *np;
 923                         int64 ino;
 924                         int32 ndx;
 925                         if (protocol_version < 26) {
 926                                 dev = read_int(f);
 927                                 ino = read_int(f);
 928                         } else {
 929                                 if (!(xflags & XMIT_SAME_DEV_pre30))
 930                                         dev = read_longint(f);
 931                                 ino = read_longint(f);
 932                         }
 933                         np = idev_node(dev, ino);
 934                         ndx = (int32)(long)np->data - 1;
 935                         if (ndx < 0) {
 936                                 ndx = cnt++;
 937                                 np->data = (void*)(long)cnt;
 938                         }
 939                         F_HL_GNUM(file) = ndx;
 940                 }
 941         }
 942 #endif
 943
 944         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 945                 if (S_ISREG(mode))
 946                         bp = (char*)F_SUM(file);
 947                 else {
 948                         /* Prior to 28, we get a useless set of nulls. */
 949                         bp = tmp_sum;
 950                 }
 951                 if (first_hlink_ndx >= 0) {
 952                         struct file_struct *first = flist->files[first_hlink_ndx];
 953                         memcpy(bp, F_SUM(first), checksum_len);
 954                 } else
 955                         read_buf(f, bp, checksum_len);
 956         }
 957
 958 #ifdef SUPPORT_ACLS
 959         if (preserve_acls && !S_ISLNK(mode))
 960                 receive_acl(file, f);
 961 #endif
 962 #ifdef SUPPORT_XATTRS
 963         if (preserve_xattrs)
 964                 receive_xattr(file, f );
 965 #endif
 966
 967         if (S_ISREG(mode) || S_ISLNK(mode))
 968                 stats.total_size += file_length;
 969
 970         return file;
 971 }
 972
 973 /**
 974  * Create a file_struct for a named file by reading its stat()
 975  * information and performing extensive checks against global
 976  * options.
 977  *
 978  * @return the new file, or NULL if there was an error or this file
 979  * should be excluded.
 980  *
 981  * @todo There is a small optimization opportunity here to avoid
 982  * stat()ing the file in some circumstances, which has a certain cost.
 983  * We are called immediately after doing readdir(), and so we may
 984  * already know the d_type of the file.  We could for example avoid
 985  * statting directories if we're not recursing, but this is not a very
 986  * important case.  Some systems may not have d_type.
 987  **/
 988 struct file_struct *make_file(const char *fname, struct file_list *flist,
 989                               STRUCT_STAT *stp, int flags, int filter_level)
 990 {
 991         static char *lastdir;
 992         static int lastdir_len = -1;
 993         struct file_struct *file;
 994         STRUCT_STAT st;
 995         char thisname[MAXPATHLEN];
 996         char linkname[MAXPATHLEN];
 997         int alloc_len, basename_len, linkname_len;
 998         int extra_len = file_extra_cnt * EXTRA_LEN;
 999         const char *basename;
1000         char *bp;
1001
1002         if (strlcpy(thisname, fname, sizeof thisname)
1003             >= sizeof thisname - pathname_len) {
1004                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
1005                 return NULL;
1006         }
1007         clean_fname(thisname, 0);
1008         if (sanitize_paths)
1009                 sanitize_path(thisname, thisname, "", 0, NULL);
1010
1011         if (stp && S_ISDIR(stp->st_mode)) {
1012                 st = *stp; /* Needed for "symlink/." with --relative. */
1013                 *linkname = '\0'; /* make IBM code checker happy */
1014         } else if (readlink_stat(thisname, &st, linkname) != 0) {
1015                 int save_errno = errno;
1016                 /* See if file is excluded before reporting an error. */
1017                 if (filter_level != NO_FILTERS
1018                  && (is_excluded(thisname, 0, filter_level)
1019                   || is_excluded(thisname, 1, filter_level))) {
1020                         if (ignore_perishable && save_errno != ENOENT)
1021                                 non_perishable_cnt++;
1022                         return NULL;
1023                 }
1024                 if (save_errno == ENOENT) {
1025 #ifdef SUPPORT_LINKS
1026                         /* Avoid "vanished" error if symlink points nowhere. */
1027                         if (copy_links && x_lstat(thisname, &st, NULL) == 0
1028                             && S_ISLNK(st.st_mode)) {
1029                                 io_error |= IOERR_GENERAL;
1030                                 rprintf(FERROR, "symlink has no referent: %s\n",
1031                                         full_fname(thisname));
1032                         } else
1033 #endif
1034                         {
1035                                 enum logcode c = am_daemon && protocol_version < 28
1036                                     ? FERROR : FINFO;
1037                                 io_error |= IOERR_VANISHED;
1038                                 rprintf(c, "file has vanished: %s\n",
1039                                         full_fname(thisname));
1040                         }
1041                 } else {
1042                         io_error |= IOERR_GENERAL;
1043                         rsyserr(FERROR, save_errno, "readlink %s failed",
1044                                 full_fname(thisname));
1045                 }
1046                 return NULL;
1047         }
1048
1049         /* backup.c calls us with filter_level set to NO_FILTERS. */
1050         if (filter_level == NO_FILTERS)
1051                 goto skip_filters;
1052
1053         if (S_ISDIR(st.st_mode) && !xfer_dirs) {
1054                 rprintf(FINFO, "skipping directory %s\n", thisname);
1055                 return NULL;
1056         }
1057
1058         /* -x only affects directories because we need to avoid recursing
1059          * into a mount-point directory, not to avoid copying a symlinked
1060          * file if -L (or similar) was specified. */
1061         if (one_file_system && st.st_dev != filesystem_dev
1062          && S_ISDIR(st.st_mode)) {
1063                 if (one_file_system > 1) {
1064                         if (verbose > 2) {
1065                                 rprintf(FINFO, "skipping mount-point dir %s\n",
1066                                         thisname);
1067                         }
1068                         return NULL;
1069                 }
1070                 flags |= FLAG_MOUNT_DIR;
1071         }
1072
1073         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level)) {
1074                 if (ignore_perishable)
1075                         non_perishable_cnt++;
1076                 return NULL;
1077         }
1078
1079         if (lp_ignore_nonreadable(module_id)) {
1080 #ifdef SUPPORT_LINKS
1081                 if (!S_ISLNK(st.st_mode))
1082 #endif
1083                         if (access(thisname, R_OK) != 0)
1084                                 return NULL;
1085         }
1086
1087   skip_filters:
1088
1089         /* Only divert a directory in the main transfer. */
1090         if (flist && flist->prev && S_ISDIR(st.st_mode)
1091          && flags & FLAG_DIVERT_DIRS) {
1092                 flist = dir_flist;
1093                 /* Room for parent/sibling/next-child info. */
1094                 extra_len += 3 * EXTRA_LEN;
1095         }
1096
1097         if (verbose > 2) {
1098                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
1099                         who_am_i(), thisname, filter_level);
1100         }
1101
1102         if ((basename = strrchr(thisname, '/')) != NULL) {
1103                 int len = basename++ - thisname;
1104                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
1105                         lastdir = new_array(char, len + 1);
1106                         memcpy(lastdir, thisname, len);
1107                         lastdir[len] = '\0';
1108                         lastdir_len = len;
1109                 }
1110         } else
1111                 basename = thisname;
1112         basename_len = strlen(basename) + 1; /* count the '\0' */
1113
1114 #ifdef SUPPORT_LINKS
1115         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
1116 #else
1117         linkname_len = 0;
1118 #endif
1119
1120         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
1121                 extra_len += EXTRA_LEN;
1122
1123 #if EXTRA_ROUNDING > 0
1124         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
1125                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
1126 #endif
1127
1128         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
1129                   + linkname_len;
1130         if (flist)
1131                 bp = pool_alloc(flist->file_pool, alloc_len, "make_file");
1132         else {
1133                 if (!(bp = new_array(char, alloc_len)))
1134                         out_of_memory("make_file");
1135         }
1136
1137         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
1138         bp += extra_len;
1139         file = (struct file_struct *)bp;
1140         bp += FILE_STRUCT_LEN;
1141
1142         memcpy(bp, basename, basename_len);
1143         bp += basename_len + linkname_len; /* skip space for symlink too */
1144
1145 #ifdef SUPPORT_HARD_LINKS
1146         if (preserve_hard_links && flist && flist->prev) {
1147                 if (protocol_version >= 28
1148                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
1149                  : S_ISREG(st.st_mode)) {
1150                         tmp_dev = st.st_dev;
1151                         tmp_ino = st.st_ino;
1152                 } else
1153                         tmp_dev = 0;
1154         }
1155 #endif
1156
1157 #ifdef HAVE_STRUCT_STAT_ST_RDEV
1158         if (IS_DEVICE(st.st_mode) || IS_SPECIAL(st.st_mode)) {
1159                 tmp_rdev = st.st_rdev;
1160                 st.st_size = 0;
1161         }
1162 #endif
1163
1164         file->flags = flags;
1165         file->modtime = st.st_mtime;
1166         file->len32 = (uint32)st.st_size;
1167         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
1168                 file->flags |= FLAG_LENGTH64;
1169                 OPT_EXTRA(file, 0)->unum = (uint32)(st.st_size >> 32);
1170         }
1171         file->mode = st.st_mode;
1172         if (preserve_uid)
1173                 F_OWNER(file) = st.st_uid;
1174         if (preserve_gid)
1175                 F_GROUP(file) = st.st_gid;
1176
1177         if (basename != thisname)
1178                 file->dirname = lastdir;
1179
1180 #ifdef SUPPORT_LINKS
1181         if (linkname_len) {
1182                 bp = (char*)file->basename + basename_len;
1183                 memcpy(bp, linkname, linkname_len);
1184         }
1185 #endif
1186
1187         if (always_checksum && am_sender && S_ISREG(st.st_mode))
1188                 file_checksum(thisname, tmp_sum, st.st_size);
1189
1190         F_PATHNAME(file) = pathname;
1191
1192         /* This code is only used by the receiver when it is building
1193          * a list of files for a delete pass. */
1194         if (keep_dirlinks && linkname_len && flist) {
1195                 STRUCT_STAT st2;
1196                 int save_mode = file->mode;
1197                 file->mode = S_IFDIR; /* Find a directory with our name. */
1198                 if (flist_find(dir_flist, file) >= 0
1199                     && x_stat(thisname, &st2, NULL) == 0 && S_ISDIR(st2.st_mode)) {
1200                         file->modtime = st2.st_mtime;
1201                         file->len32 = 0;
1202                         file->mode = st2.st_mode;
1203                         if (preserve_uid)
1204                                 F_OWNER(file) = st2.st_uid;
1205                         if (preserve_gid)
1206                                 F_GROUP(file) = st2.st_gid;
1207                 } else
1208                         file->mode = save_mode;
1209         }
1210
1211         if (basename_len == 0+1)
1212                 return NULL;
1213
1214         if (inc_recurse && flist == dir_flist) {
1215                 flist_expand(dir_flist);
1216 #ifdef ICONV_OPTION
1217                 if (ic_ndx)
1218                         F_NDX(file) = dir_flist->count;
1219                 if (need_unsorted_flist)
1220                         dir_flist->sorted[dir_flist->count] = file;
1221 #endif
1222                 dir_flist->files[dir_flist->count++] = file;
1223         }
1224
1225         return file;
1226 }
1227
1228 /* Only called for temporary file_struct entries created by make_file(). */
1229 void unmake_file(struct file_struct *file)
1230 {
1231         int extra_cnt = file_extra_cnt + LEN64_BUMP(file);
1232 #if EXTRA_ROUNDING > 0
1233         if (extra_cnt & EXTRA_ROUNDING)
1234                 extra_cnt = (extra_cnt | EXTRA_ROUNDING) + 1;
1235 #endif
1236         free(REQ_EXTRA(file, extra_cnt));
1237 }
1238
1239 static struct file_struct *send_file_name(int f, struct file_list *flist,
1240                                           char *fname, STRUCT_STAT *stp,
1241                                           int flags, int filter_flags)
1242 {
1243         struct file_struct *file;
1244 #if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
1245         statx sx;
1246 #endif
1247
1248         file = make_file(fname, flist, stp, flags, filter_flags);
1249         if (!file)
1250                 return NULL;
1251
1252         if (chmod_modes && !S_ISLNK(file->mode))
1253                 file->mode = tweak_mode(file->mode, chmod_modes);
1254
1255 #ifdef SUPPORT_ACLS
1256         if (preserve_acls && !S_ISLNK(file->mode) && f >= 0) {
1257                 sx.st.st_mode = file->mode;
1258                 sx.acc_acl = sx.def_acl = NULL;
1259                 if (get_acl(fname, &sx) < 0)
1260                         return NULL;
1261         }
1262 #endif
1263 #ifdef SUPPORT_XATTRS
1264         if (preserve_xattrs && f >= 0) {
1265                 sx.xattr = NULL;
1266                 if (get_xattr(fname, &sx) < 0)
1267                         return NULL;
1268         }
1269 #endif
1270
1271         maybe_emit_filelist_progress(flist->count + flist_count_offset);
1272
1273         flist_expand(flist);
1274         flist->files[flist->count++] = file;
1275         if (f >= 0) {
1276                 send_file_entry(f, file, flist->count - 1);
1277 #ifdef SUPPORT_ACLS
1278                 if (preserve_acls && !S_ISLNK(file->mode)) {
1279                         send_acl(&sx, f);
1280                         free_acl(&sx);
1281                 }
1282 #endif
1283 #ifdef SUPPORT_XATTRS
1284                 if (preserve_xattrs) {
1285                         F_XATTR(file) = send_xattr(&sx, f);
1286                         free_xattr(&sx);
1287                 }
1288 #endif
1289         }
1290         return file;
1291 }
1292
1293 static void send_if_directory(int f, struct file_list *flist,
1294                               struct file_struct *file,
1295                               char *fbuf, unsigned int ol,
1296                               int flags)
1297 {
1298         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1299
1300         if (S_ISDIR(file->mode)
1301             && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) {
1302                 void *save_filters;
1303                 unsigned int len = strlen(fbuf);
1304                 if (len > 1 && fbuf[len-1] == '/')
1305                         fbuf[--len] = '\0';
1306                 if (len >= MAXPATHLEN - 1) {
1307                         io_error |= IOERR_GENERAL;
1308                         rprintf(FERROR, "skipping long-named directory: %s\n",
1309                                 full_fname(fbuf));
1310                         return;
1311                 }
1312                 save_filters = push_local_filters(fbuf, len);
1313                 send_directory(f, flist, fbuf, len, flags);
1314                 pop_local_filters(save_filters);
1315                 fbuf[ol] = '\0';
1316                 if (is_dot_dir)
1317                         fbuf[ol-1] = '.';
1318         }
1319 }
1320
1321 static int file_compare(struct file_struct **file1, struct file_struct **file2)
1322 {
1323         return f_name_cmp(*file1, *file2);
1324 }
1325
1326 /* We take an entire set of sibling dirs from dir_flist (start <= ndx <= end),
1327  * sort them by name, and link them into the tree, setting the appropriate
1328  * parent/child/sibling pointers. */
1329 static void add_dirs_to_tree(int parent_ndx, int start, int end)
1330 {
1331         int i;
1332         int32 *dp = NULL;
1333         int32 *parent_dp = parent_ndx < 0 ? NULL
1334                          : F_DIRNODE_P(dir_flist->sorted[parent_ndx]);
1335
1336         qsort(dir_flist->sorted + start, end - start + 1,
1337               sizeof dir_flist->sorted[0], (int (*)())file_compare);
1338
1339         for (i = start; i <= end; i++) {
1340                 struct file_struct *file = dir_flist->sorted[i];
1341                 if (!(file->flags & FLAG_XFER_DIR)
1342                  || file->flags & FLAG_MOUNT_DIR)
1343                         continue;
1344                 if (dp)
1345                         DIR_NEXT_SIBLING(dp) = i;
1346                 else if (parent_dp)
1347                         DIR_FIRST_CHILD(parent_dp) = i;
1348                 else
1349                         send_dir_ndx = i;
1350                 dp = F_DIRNODE_P(file);
1351                 DIR_PARENT(dp) = parent_ndx;
1352                 DIR_FIRST_CHILD(dp) = -1;
1353         }
1354         if (dp)
1355                 DIR_NEXT_SIBLING(dp) = -1;
1356 }
1357
1358 /* This function is normally called by the sender, but the receiving side also
1359  * calls it from get_dirlist() with f set to -1 so that we just construct the
1360  * file list in memory without sending it over the wire.  Also, get_dirlist()
1361  * might call this with f set to -2, which also indicates that local filter
1362  * rules should be ignored. */
1363 static void send_directory(int f, struct file_list *flist, char *fbuf, int len,
1364                            int flags)
1365 {
1366         struct dirent *di;
1367         unsigned remainder;
1368         char *p;
1369         DIR *d;
1370         int divert_dirs = (flags & FLAG_DIVERT_DIRS) != 0;
1371         int start = flist->count;
1372         int filter_flags = f == -2 ? SERVER_FILTERS : ALL_FILTERS;
1373
1374         assert(flist != NULL);
1375
1376         if (!(d = opendir(fbuf))) {
1377                 io_error |= IOERR_GENERAL;
1378                 rsyserr(FERROR, errno, "opendir %s failed", full_fname(fbuf));
1379                 return;
1380         }
1381
1382         p = fbuf + len;
1383         if (len != 1 || *fbuf != '/')
1384                 *p++ = '/';
1385         *p = '\0';
1386         remainder = MAXPATHLEN - (p - fbuf);
1387
1388         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1389                 char *dname = d_name(di);
1390                 if (dname[0] == '.' && (dname[1] == '\0'
1391                     || (dname[1] == '.' && dname[2] == '\0')))
1392                         continue;
1393                 if (strlcpy(p, dname, remainder) >= remainder) {
1394                         io_error |= IOERR_GENERAL;
1395                         rprintf(FINFO,
1396                                 "cannot send long-named file %s\n",
1397                                 full_fname(fbuf));
1398                         continue;
1399                 }
1400
1401                 send_file_name(f, flist, fbuf, NULL, flags, filter_flags);
1402         }
1403
1404         fbuf[len] = '\0';
1405
1406         if (errno) {
1407                 io_error |= IOERR_GENERAL;
1408                 rsyserr(FERROR, errno, "readdir(%s)", full_fname(fbuf));
1409         }
1410
1411         closedir(d);
1412
1413         if (f >= 0 && recurse && !divert_dirs) {
1414                 int i, end = flist->count - 1;
1415                 /* send_if_directory() bumps flist->count, so use "end". */
1416                 for (i = start; i <= end; i++)
1417                         send_if_directory(f, flist, flist->files[i], fbuf, len, flags);
1418         }
1419 }
1420
1421 static void send1extra(int f, struct file_struct *file, struct file_list *flist)
1422 {
1423         char fbuf[MAXPATHLEN];
1424         int dlen;
1425
1426         f_name(file, fbuf);
1427         dlen = strlen(fbuf);
1428
1429         if (F_PATHNAME(file) != pathname) {
1430                 if (!push_pathname(F_PATHNAME(file), -1))
1431                         exit_cleanup(RERR_FILESELECT);
1432         }
1433
1434         change_local_filter_dir(fbuf, dlen, send_dir_depth);
1435
1436         send_directory(f, flist, fbuf, dlen, FLAG_DIVERT_DIRS | FLAG_XFER_DIR);
1437 }
1438
1439 void send_extra_file_list(int f, int at_least)
1440 {
1441         struct file_list *flist;
1442         int64 start_write;
1443         int future_cnt, save_io_error = io_error;
1444
1445         if (flist_eof)
1446                 return;
1447
1448         /* Keep sending data until we have the requested number of
1449          * files in the upcoming file-lists. */
1450         if (cur_flist->next) {
1451                 flist = first_flist->prev; /* the newest flist */
1452                 future_cnt = flist->count + flist->ndx_start
1453                            - cur_flist->next->ndx_start;
1454         } else
1455                 future_cnt = 0;
1456         while (future_cnt < at_least) {
1457                 struct file_struct *file = dir_flist->sorted[send_dir_ndx];
1458                 int start = dir_flist->count;
1459                 int32 *dp;
1460
1461                 flist = flist_new(0, "send_extra_file_list");
1462                 start_write = stats.total_written;
1463
1464                 /* If this is the first of a set of duplicate dirs, we must
1465                  * send all the dirs together in a single file-list.  We must
1466                  * also send the index of the last dir in the header. */
1467                 if (file->flags & FLAG_DUPLICATE) {
1468                         int dir_ndx, end_ndx = send_dir_ndx;
1469                         struct file_struct *fp = file;
1470
1471                         while (1) {
1472                                 dp = F_DIRNODE_P(fp);
1473                                 end_ndx = DIR_NEXT_SIBLING(dp);
1474                                 fp = dir_flist->sorted[end_ndx];
1475                                 if (!(fp->flags & FLAG_DUPLICATE))
1476                                         break;
1477                         }
1478
1479 #ifdef ICONV_OPTION
1480                         if (ic_ndx)
1481                                 dir_ndx = F_NDX(fp);
1482                         else
1483 #endif
1484                                 dir_ndx = end_ndx;
1485                         write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
1486
1487                         while (1) {
1488                                 send1extra(f, file, flist);
1489                                 if (send_dir_ndx == end_ndx)
1490                                         break;
1491                                 dp = F_DIRNODE_P(file);
1492                                 send_dir_ndx = DIR_NEXT_SIBLING(dp);
1493                                 file = dir_flist->sorted[send_dir_ndx];
1494                         }
1495                 } else {
1496                         int dir_ndx;
1497 #ifdef ICONV_OPTION
1498                         if (ic_ndx)
1499                                 dir_ndx = F_NDX(file);
1500                         else
1501 #endif
1502                                 dir_ndx = send_dir_ndx;
1503                         write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
1504
1505                         send1extra(f, file, flist);
1506                 }
1507                 write_byte(f, 0);
1508
1509 #ifdef ICONV_OPTION
1510                 if (!need_unsorted_flist)
1511 #endif
1512                         dir_flist->sorted = dir_flist->files;
1513                 add_dirs_to_tree(send_dir_ndx, start, dir_flist->count - 1);
1514
1515 #ifdef ICONV_OPTION
1516                 if (need_unsorted_flist) {
1517                         if (inc_recurse) {
1518                                 if (!(flist->sorted = new_array(struct file_struct *, flist->count)))
1519                                         out_of_memory("send_extra_file_list");
1520                                 memcpy(flist->sorted, flist->files,
1521                                        flist->count * sizeof (struct file_struct*));
1522                                 clean_flist(flist, 0);
1523                         } else
1524                                 flist->sorted = flist->files;
1525                 } else
1526 #endif
1527                 {
1528                         flist->sorted = flist->files;
1529                         clean_flist(flist, 0);
1530                 }
1531
1532                 file_total += flist->count;
1533                 future_cnt += flist->count;
1534                 stats.flist_size += stats.total_written - start_write;
1535                 stats.num_files += flist->count;
1536                 if (verbose > 3)
1537                         output_flist(flist);
1538
1539                 dp = F_DIRNODE_P(file);
1540                 if (DIR_FIRST_CHILD(dp) >= 0) {
1541                         send_dir_ndx = DIR_FIRST_CHILD(dp);
1542                         send_dir_depth++;
1543                 } else {
1544                         while (DIR_NEXT_SIBLING(dp) < 0) {
1545                                 if ((send_dir_ndx = DIR_PARENT(dp)) < 0) {
1546                                         write_ndx(f, NDX_FLIST_EOF);
1547                                         flist_eof = 1;
1548                                         change_local_filter_dir(NULL, 0, 0);
1549                                         goto finish;
1550                                 }
1551                                 send_dir_depth--;
1552                                 file = dir_flist->sorted[send_dir_ndx];
1553                                 dp = F_DIRNODE_P(file);
1554                         }
1555                         send_dir_ndx = DIR_NEXT_SIBLING(dp);
1556                 }
1557         }
1558
1559   finish:
1560         if (io_error != save_io_error && !ignore_errors)
1561                 send_msg_int(MSG_IO_ERROR, io_error);
1562 }
1563
1564 struct file_list *send_file_list(int f, int argc, char *argv[])
1565 {
1566         static const char *lastdir;
1567         static int lastdir_len = -1;
1568         int len, dirlen;
1569         STRUCT_STAT st;
1570         char *p, *dir;
1571         char lastpath[MAXPATHLEN] = "";
1572         struct file_list *flist;
1573         struct timeval start_tv, end_tv;
1574         int64 start_write;
1575         int use_ff_fd = 0;
1576         int flags, disable_buffering;
1577
1578         rprintf(FLOG, "building file list\n");
1579         if (show_filelist_p())
1580                 start_filelist_progress("building file list");
1581         else if (inc_recurse && verbose && !am_server)
1582                 rprintf(FCLIENT, "sending incremental file list\n");
1583
1584         start_write = stats.total_written;
1585         gettimeofday(&start_tv, NULL);
1586
1587 #ifdef SUPPORT_HARD_LINKS
1588         if (preserve_hard_links && protocol_version >= 30 && !cur_flist)
1589                 init_hard_links();
1590 #endif
1591
1592         flist = cur_flist = flist_new(0, "send_file_list");
1593         if (inc_recurse) {
1594                 dir_flist = flist_new(FLIST_TEMP, "send_file_list");
1595                 flags = FLAG_DIVERT_DIRS;
1596         } else {
1597                 dir_flist = cur_flist;
1598                 flags = 0;
1599         }
1600
1601         disable_buffering = io_start_buffering_out(f);
1602         if (filesfrom_fd >= 0) {
1603                 if (argv[0] && !push_dir(argv[0], 0)) {
1604                         rsyserr(FERROR, errno, "push_dir %s failed in %s",
1605                                 full_fname(argv[0]), curr_dir);
1606                         exit_cleanup(RERR_FILESELECT);
1607                 }
1608                 use_ff_fd = 1;
1609         }
1610
1611         while (1) {
1612                 char fbuf[MAXPATHLEN];
1613                 char *fn;
1614                 int is_dot_dir;
1615
1616                 if (use_ff_fd) {
1617                         if (read_filesfrom_line(filesfrom_fd, fbuf) == 0)
1618                                 break;
1619                         sanitize_path(fbuf, fbuf, "", 0, NULL);
1620                 } else {
1621                         if (argc-- == 0)
1622                                 break;
1623                         strlcpy(fbuf, *argv++, MAXPATHLEN);
1624                         if (sanitize_paths)
1625                                 sanitize_path(fbuf, fbuf, "", 0, NULL);
1626                 }
1627
1628                 len = strlen(fbuf);
1629                 if (relative_paths) {
1630                         /* We clean up fbuf below. */
1631                         is_dot_dir = 0;
1632                 } else if (!len || fbuf[len - 1] == '/') {
1633                         if (len == 2 && fbuf[0] == '.') {
1634                                 /* Turn "./" into just "." rather than "./." */
1635                                 fbuf[1] = '\0';
1636                         } else {
1637                                 if (len + 1 >= MAXPATHLEN)
1638                                         overflow_exit("send_file_list");
1639                                 fbuf[len++] = '.';
1640                                 fbuf[len] = '\0';
1641                         }
1642                         is_dot_dir = 1;
1643                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
1644                     && (len == 2 || fbuf[len-3] == '/')) {
1645                         if (len + 2 >= MAXPATHLEN)
1646                                 overflow_exit("send_file_list");
1647                         fbuf[len++] = '/';
1648                         fbuf[len++] = '.';
1649                         fbuf[len] = '\0';
1650                         is_dot_dir = 1;
1651                 } else {
1652                         is_dot_dir = fbuf[len-1] == '.'
1653                                    && (len == 1 || fbuf[len-2] == '/');
1654                 }
1655
1656                 dir = NULL;
1657
1658                 if (!relative_paths) {
1659                         p = strrchr(fbuf, '/');
1660                         if (p) {
1661                                 *p = '\0';
1662                                 if (p == fbuf)
1663                                         dir = "/";
1664                                 else
1665                                         dir = fbuf;
1666                                 len -= p - fbuf + 1;
1667                                 fn = p + 1;
1668                         } else
1669                                 fn = fbuf;
1670                 } else {
1671                         if ((p = strstr(fbuf, "/./")) != NULL) {
1672                                 *p = '\0';
1673                                 if (p == fbuf)
1674                                         dir = "/";
1675                                 else
1676                                         dir = fbuf;
1677                                 len -= p - fbuf + 3;
1678                                 fn = p + 3;
1679                         } else
1680                                 fn = fbuf;
1681                         /* Get rid of trailing "/" and "/.". */
1682                         while (len) {
1683                                 if (fn[len - 1] == '/') {
1684                                         is_dot_dir = 1;
1685                                         if (!--len && !dir) {
1686                                                 len++;
1687                                                 break;
1688                                         }
1689                                 }
1690                                 else if (len >= 2 && fn[len - 1] == '.'
1691                                                   && fn[len - 2] == '/') {
1692                                         is_dot_dir = 1;
1693                                         if (!(len -= 2) && !dir) {
1694                                                 len++;
1695                                                 break;
1696                                         }
1697                                 } else
1698                                         break;
1699                         }
1700                         if (len == 1 && fn[0] == '/')
1701                                 fn[len++] = '.';
1702                         fn[len] = '\0';
1703                         /* Reject a ".." dir in the active part of the path. */
1704                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
1705                                 if ((p[2] == '/' || p[2] == '\0')
1706                                  && (p == fn || p[-1] == '/')) {
1707                                         rprintf(FERROR,
1708                                             "found \"..\" dir in relative path: %s\n",
1709                                             fbuf);
1710                                         exit_cleanup(RERR_SYNTAX);
1711                                 }
1712                         }
1713                 }
1714
1715                 if (!*fn) {
1716                         len = 1;
1717                         fn = ".";
1718                 }
1719
1720                 dirlen = dir ? strlen(dir) : 0;
1721                 if (dirlen != lastdir_len || memcmp(lastdir, dir, dirlen) != 0) {
1722                         if (!push_pathname(dir ? strdup(dir) : NULL, dirlen))
1723                                 goto push_error;
1724                         lastdir = pathname;
1725                         lastdir_len = pathname_len;
1726                 } else if (!push_pathname(lastdir, lastdir_len)) {
1727                   push_error:
1728                         io_error |= IOERR_GENERAL;
1729                         rsyserr(FERROR, errno, "push_dir %s failed in %s",
1730                                 full_fname(dir), curr_dir);
1731                         continue;
1732                 }
1733
1734                 if (fn != fbuf)
1735                         memmove(fbuf, fn, len + 1);
1736
1737                 if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1738                         io_error |= IOERR_GENERAL;
1739                         rsyserr(FERROR, errno, "link_stat %s failed",
1740                                 full_fname(fbuf));
1741                         continue;
1742                 }
1743
1744                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
1745                         rprintf(FINFO, "skipping directory %s\n", fbuf);
1746                         continue;
1747                 }
1748
1749                 if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
1750                         /* Send the implied directories at the start of the
1751                          * source spec, so we get their permissions right. */
1752                         char *lp = lastpath, *slash = fbuf;
1753                         *p = '\0';
1754                         /* Skip any initial directories in our path that we
1755                          * have in common with lastpath. */
1756                         for (fn = fbuf; *fn && *lp == *fn; lp++, fn++) {
1757                                 if (*fn == '/')
1758                                         slash = fn;
1759                         }
1760                         *p = '/';
1761                         if (fn != p || (*lp && *lp != '/')) {
1762                                 int save_copy_links = copy_links;
1763                                 int save_xfer_dirs = xfer_dirs;
1764                                 int dir_flags = inc_recurse ? FLAG_DIVERT_DIRS : 0;
1765                                 copy_links |= copy_unsafe_links;
1766                                 xfer_dirs = 1;
1767                                 while ((slash = strchr(slash+1, '/')) != 0) {
1768                                         *slash = '\0';
1769                                         send_file_name(f, flist, fbuf, NULL,
1770                                                        dir_flags, ALL_FILTERS);
1771                                         *slash = '/';
1772                                 }
1773                                 copy_links = save_copy_links;
1774                                 xfer_dirs = save_xfer_dirs;
1775                                 *p = '\0';
1776                                 strlcpy(lastpath, fbuf, sizeof lastpath);
1777                                 *p = '/';
1778                         }
1779                 }
1780
1781                 if (one_file_system)
1782                         filesystem_dev = st.st_dev;
1783
1784                 if (recurse || (xfer_dirs && is_dot_dir)) {
1785                         struct file_struct *file;
1786                         int top_flags = FLAG_TOP_DIR | FLAG_XFER_DIR | flags;
1787                         file = send_file_name(f, flist, fbuf, &st,
1788                                               top_flags, ALL_FILTERS);
1789                         if (file && !inc_recurse)
1790                                 send_if_directory(f, flist, file, fbuf, len, flags);
1791                 } else
1792                         send_file_name(f, flist, fbuf, &st, flags, ALL_FILTERS);
1793         }
1794
1795         gettimeofday(&end_tv, NULL);
1796         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
1797                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
1798         if (stats.flist_buildtime == 0)
1799                 stats.flist_buildtime = 1;
1800         start_tv = end_tv;
1801
1802         write_byte(f, 0); /* Indicate end of file list */
1803
1804 #ifdef SUPPORT_HARD_LINKS
1805         if (preserve_hard_links && protocol_version >= 30 && !inc_recurse)
1806                 idev_destroy();
1807 #endif
1808
1809         if (show_filelist_p())
1810                 finish_filelist_progress(flist);
1811
1812         gettimeofday(&end_tv, NULL);
1813         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
1814                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
1815
1816         /* When converting names, both sides keep an unsorted file-list array
1817          * because the names will differ on the sending and receiving sides
1818          * (both sides will use the unsorted index number for each item). */
1819
1820         /* Sort the list without removing any duplicates.  This allows the
1821          * receiving side to ask for whatever name it kept.  For incremental
1822          * recursion mode, the sender marks duplicate dirs so that it can
1823          * send them together in a single file-list. */
1824 #ifdef ICONV_OPTION
1825         if (need_unsorted_flist) {
1826                 if (inc_recurse) {
1827                         if (!(flist->sorted = new_array(struct file_struct *, flist->count)))
1828                                 out_of_memory("send_file_list");
1829                         memcpy(flist->sorted, flist->files,
1830                                flist->count * sizeof (struct file_struct*));
1831                         clean_flist(flist, 0);
1832                 } else
1833                         flist->sorted = flist->files;
1834         } else
1835 #endif
1836         {
1837                 flist->sorted = flist->files;
1838                 clean_flist(flist, 0);
1839         }
1840         file_total += flist->count;
1841
1842         if (!numeric_ids && !inc_recurse)
1843                 send_id_list(f);
1844
1845         /* send the io_error flag */
1846         if (protocol_version < 30)
1847                 write_int(f, ignore_errors ? 0 : io_error);
1848         else if (io_error && !ignore_errors)
1849                 send_msg_int(MSG_IO_ERROR, io_error);
1850
1851         if (disable_buffering)
1852                 io_end_buffering_out();
1853
1854         stats.flist_size = stats.total_written - start_write;
1855         stats.num_files = flist->count;
1856
1857         if (verbose > 3)
1858                 output_flist(flist);
1859
1860         if (verbose > 2)
1861                 rprintf(FINFO, "send_file_list done\n");
1862
1863         if (inc_recurse) {
1864 #ifdef ICONV_OPTION
1865                 if (!need_unsorted_flist)
1866 #endif
1867                         dir_flist->sorted = dir_flist->files;
1868                 add_dirs_to_tree(-1, 0, dir_flist->count - 1);
1869                 if (send_dir_ndx < 0) {
1870                         write_ndx(f, NDX_FLIST_EOF);
1871                         flist_eof = 1;
1872                 }
1873                 else if (file_total == 1) {
1874                         /* If we're creating incremental file-lists and there
1875                          * was just 1 item in the first file-list, send 1 more
1876                          * file-list to check if this is a 1-file xfer. */
1877                         send_extra_file_list(f, 1);
1878                 }
1879         }
1880
1881         return flist;
1882 }
1883
1884 struct file_list *recv_file_list(int f)
1885 {
1886         struct file_list *flist;
1887         int dstart, flags;
1888         int64 start_read;
1889
1890         if (!first_flist)
1891                 rprintf(FLOG, "receiving file list\n");
1892         if (show_filelist_p())
1893                 start_filelist_progress("receiving file list");
1894         else if (inc_recurse && verbose && !am_server && !first_flist)
1895                 rprintf(FCLIENT, "receiving incremental file list\n");
1896
1897         start_read = stats.total_read;
1898
1899         flist = flist_new(0, "recv_file_list");
1900
1901 #ifdef SUPPORT_HARD_LINKS
1902         if (preserve_hard_links && protocol_version < 30)
1903                 init_hard_links();
1904 #endif
1905
1906         if (inc_recurse) {
1907                 if (flist->ndx_start == 0)
1908                         dir_flist = flist_new(FLIST_TEMP, "recv_file_list");
1909                 dstart = dir_flist->count;
1910         } else {
1911                 dir_flist = flist;
1912                 dstart = 0;
1913         }
1914
1915         while ((flags = read_byte(f)) != 0) {
1916                 struct file_struct *file;
1917
1918                 flist_expand(flist);
1919
1920                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
1921                         flags |= read_byte(f) << 8;
1922                 file = recv_file_entry(flist, flags, f);
1923
1924                 if (inc_recurse && S_ISDIR(file->mode)) {
1925                         flist_expand(dir_flist);
1926 #ifdef ICONV_OPTION
1927                         if (need_unsorted_flist)
1928                                 dir_flist->sorted[dir_flist->count] = file;
1929 #endif
1930                         dir_flist->files[dir_flist->count++] = file;
1931                 }
1932
1933                 flist->files[flist->count++] = file;
1934
1935                 maybe_emit_filelist_progress(flist->count);
1936
1937                 if (verbose > 2) {
1938                         rprintf(FINFO, "recv_file_name(%s)\n",
1939                                 f_name(file, NULL));
1940                 }
1941         }
1942         file_total += flist->count;
1943
1944         if (verbose > 2)
1945                 rprintf(FINFO, "received %d names\n", flist->count);
1946
1947         if (show_filelist_p())
1948                 finish_filelist_progress(flist);
1949
1950 #ifdef ICONV_OPTION
1951         if (need_unsorted_flist) {
1952                 /* Create an extra array of index pointers that we can sort for
1953                  * the generator's use (for wading through the files in sorted
1954                  * order and for calling flist_find()).  We keep the "files"
1955                  * list unsorted for our exchange of index numbers with the
1956                  * other side (since their names may not sort the same). */
1957                 if (!(flist->sorted = new_array(struct file_struct *, flist->count)))
1958                         out_of_memory("recv_file_list");
1959                 memcpy(flist->sorted, flist->files,
1960                        flist->count * sizeof (struct file_struct*));
1961                 if (inc_recurse) {
1962                         qsort(dir_flist->sorted + dstart, dir_flist->count - dstart,
1963                               sizeof (struct file_struct*), (int (*)())file_compare);
1964                 }
1965         } else
1966 #endif
1967         {
1968                 flist->sorted = flist->files;
1969                 if (inc_recurse) {
1970                         dir_flist->sorted = dir_flist->files;
1971                         qsort(dir_flist->sorted + dstart, dir_flist->count - dstart,
1972                               sizeof (struct file_struct*), (int (*)())file_compare);
1973                 }
1974         }
1975
1976         if (!inc_recurse && f >= 0)
1977                 recv_id_list(f, flist);
1978
1979         clean_flist(flist, relative_paths);
1980
1981         if (protocol_version < 30) {
1982                 /* Recv the io_error flag */
1983                 if (ignore_errors)
1984                         read_int(f);
1985                 else
1986                         io_error |= read_int(f);
1987         }
1988
1989         if (verbose > 3)
1990                 output_flist(flist);
1991
1992         if (list_only) {
1993                 int i;
1994                 for (i = 0; i < flist->count; i++)
1995                         list_file_entry(flist->files[i]);
1996         }
1997
1998         if (verbose > 2)
1999                 rprintf(FINFO, "recv_file_list done\n");
2000
2001         stats.flist_size += stats.total_read - start_read;
2002         stats.num_files += flist->count;
2003
2004         return flist;
2005 }
2006
2007 /* This is only used once by the receiver if the very first file-list
2008  * has exactly one item in it. */
2009 void recv_additional_file_list(int f)
2010 {
2011         struct file_list *flist;
2012         int ndx = read_ndx(f);
2013         if (ndx == NDX_FLIST_EOF) {
2014                 flist_eof = 1;
2015                 change_local_filter_dir(NULL, 0, 0);
2016         } else {
2017                 ndx = NDX_FLIST_OFFSET - ndx;
2018                 if (ndx < 0 || ndx >= dir_flist->count) {
2019                         ndx = NDX_FLIST_OFFSET - ndx;
2020                         rprintf(FERROR,
2021                                 "Invalid dir index: %d (%d - %d)\n",
2022                                 ndx, NDX_FLIST_OFFSET,
2023                                 NDX_FLIST_OFFSET - dir_flist->count);
2024                         exit_cleanup(RERR_PROTOCOL);
2025                 }
2026                 flist = recv_file_list(f);
2027                 flist->parent_ndx = ndx;
2028         }
2029 }
2030
2031 /* Search for an identically-named item in the file list.  Note that the
2032  * items must agree in their directory-ness, or no match is returned. */
2033 int flist_find(struct file_list *flist, struct file_struct *f)
2034 {
2035         int low = flist->low, high = flist->high;
2036         int diff, mid, mid_up;
2037
2038         while (low <= high) {
2039                 mid = (low + high) / 2;
2040                 if (F_IS_ACTIVE(flist->sorted[mid]))
2041                         mid_up = mid;
2042                 else {
2043                         /* Scan for the next non-empty entry using the cached
2044                          * distance values.  If the value isn't fully up-to-
2045                          * date, update it. */
2046                         mid_up = mid + F_DEPTH(flist->sorted[mid]);
2047                         if (!F_IS_ACTIVE(flist->sorted[mid_up])) {
2048                                 do {
2049                                     mid_up += F_DEPTH(flist->sorted[mid_up]);
2050                                 } while (!F_IS_ACTIVE(flist->sorted[mid_up]));
2051                                 F_DEPTH(flist->sorted[mid]) = mid_up - mid;
2052                         }
2053                         if (mid_up > high) {
2054                                 /* If there's nothing left above us, set high to
2055                                  * a non-empty entry below us and continue. */
2056                                 high = mid - (int)flist->sorted[mid]->len32;
2057                                 if (!F_IS_ACTIVE(flist->sorted[high])) {
2058                                         do {
2059                                             high -= (int)flist->sorted[high]->len32;
2060                                         } while (!F_IS_ACTIVE(flist->sorted[high]));
2061                                         flist->sorted[mid]->len32 = mid - high;
2062                                 }
2063                                 continue;
2064                         }
2065                 }
2066                 diff = f_name_cmp(flist->sorted[mid_up], f);
2067                 if (diff == 0) {
2068                         if (protocol_version < 29
2069                             && S_ISDIR(flist->sorted[mid_up]->mode)
2070                             != S_ISDIR(f->mode))
2071                                 return -1;
2072                         return mid_up;
2073                 }
2074                 if (diff < 0)
2075                         low = mid_up + 1;
2076                 else
2077                         high = mid - 1;
2078         }
2079         return -1;
2080 }
2081
2082 /*
2083  * Free up any resources a file_struct has allocated
2084  * and clear the file.
2085  */
2086 void clear_file(struct file_struct *file)
2087 {
2088         /* The +1 zeros out the first char of the basename. */
2089         memset(file, 0, FILE_STRUCT_LEN + 1);
2090         /* In an empty entry, F_DEPTH() is an offset to the next non-empty
2091          * entry.  Likewise for len32 in the opposite direction.  We assume
2092          * that we're alone for now since flist_find() will adjust the counts
2093          * it runs into that aren't up-to-date. */
2094         file->len32 = F_DEPTH(file) = 1;
2095 }
2096
2097 /* Allocate a new file list. */
2098 struct file_list *flist_new(int flags, char *msg)
2099 {
2100         struct file_list *flist;
2101
2102         flist = new(struct file_list);
2103         if (!flist)
2104                 out_of_memory(msg);
2105
2106         memset(flist, 0, sizeof flist[0]);
2107
2108         if (!(flags & FLIST_TEMP)) {
2109                 if (first_flist) {
2110                         flist->ndx_start = first_flist->prev->ndx_start
2111                                          + first_flist->prev->count;
2112                 }
2113                 /* This is a doubly linked list with prev looping back to
2114                  * the end of the list, but the last next pointer is NULL. */
2115                 if (!first_flist)
2116                         first_flist = cur_flist = flist->prev = flist;
2117                 else {
2118                         flist->prev = first_flist->prev;
2119                         flist->prev->next = first_flist->prev = flist;
2120                 }
2121                 flist_cnt++;
2122         }
2123
2124         if (!(flist->file_pool = pool_create(FILE_EXTENT, 0, out_of_memory, POOL_INTERN)))
2125                 out_of_memory(msg);
2126
2127         return flist;
2128 }
2129
2130 /* Free up all elements in a flist. */
2131 void flist_free(struct file_list *flist)
2132 {
2133         if (!flist->prev)
2134                 ; /* Was FLIST_TEMP dir-list. */
2135         else if (flist == flist->prev) {
2136                 first_flist = cur_flist = NULL;
2137                 file_total = 0;
2138                 flist_cnt = 0;
2139         } else {
2140                 if (flist == cur_flist)
2141                         cur_flist = flist->next;
2142                 if (flist == first_flist)
2143                         first_flist = first_flist->next;
2144                 else {
2145                         flist->prev->next = flist->next;
2146                         if (!flist->next)
2147                                 flist->next = first_flist;
2148                 }
2149                 flist->next->prev = flist->prev;
2150                 file_total -= flist->count;
2151                 flist_cnt--;
2152         }
2153
2154         pool_destroy(flist->file_pool);
2155         if (flist->sorted && flist->sorted != flist->files)
2156                 free(flist->sorted);
2157         free(flist->files);
2158         free(flist);
2159 }
2160
2161 /* This routine ensures we don't have any duplicate names in our file list.
2162  * duplicate names can cause corruption because of the pipelining. */
2163 static void clean_flist(struct file_list *flist, int strip_root)
2164 {
2165         char fbuf[MAXPATHLEN];
2166         int i, prev_i;
2167
2168         if (!flist)
2169                 return;
2170         if (flist->count == 0) {
2171                 flist->high = -1;
2172                 return;
2173         }
2174
2175         qsort(flist->sorted, flist->count,
2176             sizeof flist->sorted[0], (int (*)())file_compare);
2177
2178         if (!am_sender || inc_recurse) {
2179                 for (i = prev_i = 0; i < flist->count; i++) {
2180                         if (F_IS_ACTIVE(flist->sorted[i])) {
2181                                 prev_i = i;
2182                                 break;
2183                         }
2184                 }
2185                 flist->low = prev_i;
2186         } else {
2187                 i = prev_i = flist->count - 1;
2188                 flist->low = 0;
2189         }
2190
2191         while (++i < flist->count) {
2192                 int j;
2193                 struct file_struct *file = flist->sorted[i];
2194
2195                 if (!F_IS_ACTIVE(file))
2196                         continue;
2197                 if (f_name_cmp(file, flist->sorted[prev_i]) == 0)
2198                         j = prev_i;
2199                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
2200                         int save_mode = file->mode;
2201                         /* Make sure that this directory doesn't duplicate a
2202                          * non-directory earlier in the list. */
2203                         flist->high = prev_i;
2204                         file->mode = S_IFREG;
2205                         j = flist_find(flist, file);
2206                         file->mode = save_mode;
2207                 } else
2208                         j = -1;
2209                 if (j >= 0) {
2210                         struct file_struct *fp = flist->sorted[j];
2211                         int keep, drop;
2212                         /* If one is a dir and the other is not, we want to
2213                          * keep the dir because it might have contents in the
2214                          * list. */
2215                         if (S_ISDIR(file->mode) != S_ISDIR(fp->mode)) {
2216                                 if (S_ISDIR(file->mode))
2217                                         keep = i, drop = j;
2218                                 else
2219                                         keep = j, drop = i;
2220                         } else if (protocol_version < 27)
2221                                 keep = j, drop = i;
2222                         else
2223                                 keep = i, drop = j;
2224
2225                         if (am_sender)
2226                                 flist->sorted[drop]->flags |= FLAG_DUPLICATE;
2227                         else {
2228                                 if (verbose > 1) {
2229                                         rprintf(FINFO,
2230                                             "removing duplicate name %s from file list (%d)\n",
2231                                             f_name(file, fbuf), drop + flist->ndx_start);
2232                                 }
2233                                 /* Make sure we don't lose track of a user-specified
2234                                  * top directory. */
2235                                 flist->sorted[keep]->flags |= flist->sorted[drop]->flags
2236                                                            & (FLAG_TOP_DIR|FLAG_XFER_DIR);
2237
2238                                 clear_file(flist->sorted[drop]);
2239                         }
2240
2241                         if (keep == i) {
2242                                 if (flist->low == drop) {
2243                                         for (j = drop + 1;
2244                                              j < i && !F_IS_ACTIVE(flist->sorted[j]);
2245                                              j++) {}
2246                                         flist->low = j;
2247                                 }
2248                                 prev_i = i;
2249                         }
2250                 } else
2251                         prev_i = i;
2252         }
2253         flist->high = prev_i;
2254
2255         if (strip_root) {
2256                 /* We need to strip off the leading slashes for relative
2257                  * paths, but this must be done _after_ the sorting phase. */
2258                 for (i = flist->low; i <= flist->high; i++) {
2259                         struct file_struct *file = flist->sorted[i];
2260
2261                         if (!file->dirname)
2262                                 continue;
2263                         while (*file->dirname == '/')
2264                                 file->dirname++;
2265                         if (!*file->dirname)
2266                                 file->dirname = NULL;
2267                 }
2268         }
2269
2270         if (prune_empty_dirs && !am_sender) {
2271                 int j, prev_depth = 0;
2272
2273                 prev_i = 0; /* It's OK that this isn't really true. */
2274
2275                 for (i = flist->low; i <= flist->high; i++) {
2276                         struct file_struct *fp, *file = flist->sorted[i];
2277
2278                         /* This temporarily abuses the F_DEPTH() value for a
2279                          * directory that is in a chain that might get pruned.
2280                          * We restore the old value if it gets a reprieve. */
2281                         if (S_ISDIR(file->mode) && F_DEPTH(file)) {
2282                                 /* Dump empty dirs when coming back down. */
2283                                 for (j = prev_depth; j >= F_DEPTH(file); j--) {
2284                                         fp = flist->sorted[prev_i];
2285                                         if (F_DEPTH(fp) >= 0)
2286                                                 break;
2287                                         prev_i = -F_DEPTH(fp)-1;
2288                                         clear_file(fp);
2289                                 }
2290                                 prev_depth = F_DEPTH(file);
2291                                 if (is_excluded(f_name(file, fbuf), 1,
2292                                                        ALL_FILTERS)) {
2293                                         /* Keep dirs through this dir. */
2294                                         for (j = prev_depth-1; ; j--) {
2295                                                 fp = flist->sorted[prev_i];
2296                                                 if (F_DEPTH(fp) >= 0)
2297                                                         break;
2298                                                 prev_i = -F_DEPTH(fp)-1;
2299                                                 F_DEPTH(fp) = j;
2300                                         }
2301                                 } else
2302                                         F_DEPTH(file) = -prev_i-1;
2303                                 prev_i = i;
2304                         } else {
2305                                 /* Keep dirs through this non-dir. */
2306                                 for (j = prev_depth; ; j--) {
2307                                         fp = flist->sorted[prev_i];
2308                                         if (F_DEPTH(fp) >= 0)
2309                                                 break;
2310                                         prev_i = -F_DEPTH(fp)-1;
2311                                         F_DEPTH(fp) = j;
2312                                 }
2313                         }
2314                 }
2315                 /* Dump all remaining empty dirs. */
2316                 while (1) {
2317                         struct file_struct *fp = flist->sorted[prev_i];
2318                         if (F_DEPTH(fp) >= 0)
2319                                 break;
2320                         prev_i = -F_DEPTH(fp)-1;
2321                         clear_file(fp);
2322                 }
2323
2324                 for (i = flist->low; i <= flist->high; i++) {
2325                         if (F_IS_ACTIVE(flist->sorted[i]))
2326                                 break;
2327                 }
2328                 flist->low = i;
2329                 for (i = flist->high; i >= flist->low; i--) {
2330                         if (F_IS_ACTIVE(flist->sorted[i]))
2331                                 break;
2332                 }
2333                 flist->high = i;
2334         }
2335 }
2336
2337 static void output_flist(struct file_list *flist)
2338 {
2339         char uidbuf[16], gidbuf[16], depthbuf[16];
2340         struct file_struct *file;
2341         const char *root, *dir, *slash, *name, *trail;
2342         const char *who = who_am_i();
2343         int i;
2344
2345         rprintf(FINFO, "[%s] flist start=%d, count=%d, low=%d, high=%d\n",
2346                 who, flist->ndx_start, flist->count, flist->low, flist->high);
2347         for (i = 0; i < flist->count; i++) {
2348                 file = flist->sorted[i];
2349                 if ((am_root || am_sender) && preserve_uid) {
2350                         snprintf(uidbuf, sizeof uidbuf, " uid=%u",
2351                                  F_OWNER(file));
2352                 } else
2353                         *uidbuf = '\0';
2354                 if (preserve_gid) {
2355                         static char parens[] = "(\0)\0\0\0";
2356                         char *pp = parens + (file->flags & FLAG_SKIP_GROUP ? 0 : 3);
2357                         snprintf(gidbuf, sizeof gidbuf, " gid=%s%u%s",
2358                                  pp, F_GROUP(file), pp + 2);
2359                 } else
2360                         *gidbuf = '\0';
2361                 if (!am_sender)
2362                         snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file));
2363                 if (F_IS_ACTIVE(file)) {
2364                         root = am_sender ? NS(F_PATHNAME(file)) : depthbuf;
2365                         if ((dir = file->dirname) == NULL)
2366                                 dir = slash = "";
2367                         else
2368                                 slash = "/";
2369                         name = file->basename;
2370                         trail = S_ISDIR(file->mode) ? "/" : "";
2371                 } else
2372                         root = dir = slash = name = trail = "";
2373                 rprintf(FINFO,
2374                         "[%s] i=%d %s %s%s%s%s mode=0%o len=%.0f%s%s flags=%x\n",
2375                         who, i + flist->ndx_start,
2376                         root, dir, slash, name, trail,
2377                         (int)file->mode, (double)F_LENGTH(file),
2378                         uidbuf, gidbuf, file->flags);
2379         }
2380 }
2381
2382 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
2383 enum fnc_type { t_PATH, t_ITEM };
2384
2385 /* Compare the names of two file_struct entities, similar to how strcmp()
2386  * would do if it were operating on the joined strings.
2387  *
2388  * Some differences beginning with protocol_version 29: (1) directory names
2389  * are compared with an assumed trailing slash so that they compare in a
2390  * way that would cause them to sort immediately prior to any content they
2391  * may have; (2) a directory of any name compares after a non-directory of
2392  * any name at the same depth; (3) a directory with name "." compares prior
2393  * to anything else.  These changes mean that a directory and a non-dir
2394  * with the same name will not compare as equal (protocol_version >= 29).
2395  *
2396  * The dirname component can be an empty string, but the basename component
2397  * cannot (and never is in the current codebase).  The basename component
2398  * may be NULL (for a removed item), in which case it is considered to be
2399  * after any existing item. */
2400 int f_name_cmp(struct file_struct *f1, struct file_struct *f2)
2401 {
2402         int dif;
2403         const uchar *c1, *c2;
2404         enum fnc_state state1, state2;
2405         enum fnc_type type1, type2;
2406         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
2407
2408         if (!f1 || !F_IS_ACTIVE(f1)) {
2409                 if (!f2 || !F_IS_ACTIVE(f2))
2410                         return 0;
2411                 return -1;
2412         }
2413         if (!f2 || !F_IS_ACTIVE(f2))
2414                 return 1;
2415
2416         c1 = (uchar*)f1->dirname;
2417         c2 = (uchar*)f2->dirname;
2418         if (c1 == c2)
2419                 c1 = c2 = NULL;
2420         if (!c1) {
2421                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2422                 c1 = (const uchar*)f1->basename;
2423                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2424                         type1 = t_ITEM;
2425                         state1 = s_TRAILING;
2426                         c1 = (uchar*)"";
2427                 } else
2428                         state1 = s_BASE;
2429         } else {
2430                 type1 = t_path;
2431                 state1 = s_DIR;
2432         }
2433         if (!c2) {
2434                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2435                 c2 = (const uchar*)f2->basename;
2436                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2437                         type2 = t_ITEM;
2438                         state2 = s_TRAILING;
2439                         c2 = (uchar*)"";
2440                 } else
2441                         state2 = s_BASE;
2442         } else {
2443                 type2 = t_path;
2444                 state2 = s_DIR;
2445         }
2446
2447         if (type1 != type2)
2448                 return type1 == t_PATH ? 1 : -1;
2449
2450         do {
2451                 if (!*c1) {
2452                         switch (state1) {
2453                         case s_DIR:
2454                                 state1 = s_SLASH;
2455                                 c1 = (uchar*)"/";
2456                                 break;
2457                         case s_SLASH:
2458                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2459                                 c1 = (const uchar*)f1->basename;
2460                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2461                                         type1 = t_ITEM;
2462                                         state1 = s_TRAILING;
2463                                         c1 = (uchar*)"";
2464                                 } else
2465                                         state1 = s_BASE;
2466                                 break;
2467                         case s_BASE:
2468                                 state1 = s_TRAILING;
2469                                 if (type1 == t_PATH) {
2470                                         c1 = (uchar*)"/";
2471                                         break;
2472                                 }
2473                                 /* FALL THROUGH */
2474                         case s_TRAILING:
2475                                 type1 = t_ITEM;
2476                                 break;
2477                         }
2478                         if (*c2 && type1 != type2)
2479                                 return type1 == t_PATH ? 1 : -1;
2480                 }
2481                 if (!*c2) {
2482                         switch (state2) {
2483                         case s_DIR:
2484                                 state2 = s_SLASH;
2485                                 c2 = (uchar*)"/";
2486                                 break;
2487                         case s_SLASH:
2488                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2489                                 c2 = (const uchar*)f2->basename;
2490                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2491                                         type2 = t_ITEM;
2492                                         state2 = s_TRAILING;
2493                                         c2 = (uchar*)"";
2494                                 } else
2495                                         state2 = s_BASE;
2496                                 break;
2497                         case s_BASE:
2498                                 state2 = s_TRAILING;
2499                                 if (type2 == t_PATH) {
2500                                         c2 = (uchar*)"/";
2501                                         break;
2502                                 }
2503                                 /* FALL THROUGH */
2504                         case s_TRAILING:
2505                                 if (!*c1)
2506                                         return 0;
2507                                 type2 = t_ITEM;
2508                                 break;
2509                         }
2510                         if (type1 != type2)
2511                                 return type1 == t_PATH ? 1 : -1;
2512                 }
2513         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
2514
2515         return dif;
2516 }
2517
2518 char *f_name_buf(void)
2519 {
2520         static char names[5][MAXPATHLEN];
2521         static unsigned int n;
2522
2523         n = (n + 1) % (sizeof names / sizeof names[0]);
2524
2525         return names[n];
2526 }
2527
2528 /* Return a copy of the full filename of a flist entry, using the indicated
2529  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
2530  * done because we checked the size when creating the file_struct entry.
2531  */
2532 char *f_name(struct file_struct *f, char *fbuf)
2533 {
2534         if (!f || !F_IS_ACTIVE(f))
2535                 return NULL;
2536
2537         if (!fbuf)
2538                 fbuf = f_name_buf();
2539
2540         if (f->dirname) {
2541                 int len = strlen(f->dirname);
2542                 memcpy(fbuf, f->dirname, len);
2543                 fbuf[len] = '/';
2544                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
2545         } else
2546                 strlcpy(fbuf, f->basename, MAXPATHLEN);
2547
2548         return fbuf;
2549 }
2550
2551 /* Do a non-recursive scan of the named directory, possibly ignoring all
2552  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
2553  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
2554  * buffer (the functions we call will append names onto the end, but the old
2555  * dir value will be restored on exit). */
2556 struct file_list *get_dirlist(char *dirname, int dlen, int ignore_filter_rules)
2557 {
2558         struct file_list *dirlist;
2559         char dirbuf[MAXPATHLEN];
2560         int save_recurse = recurse;
2561         int save_xfer_dirs = xfer_dirs;
2562
2563         if (dlen < 0) {
2564                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
2565                 if (dlen >= MAXPATHLEN)
2566                         return NULL;
2567                 dirname = dirbuf;
2568         }
2569
2570         dirlist = flist_new(FLIST_TEMP, "get_dirlist");
2571
2572         recurse = 0;
2573         xfer_dirs = 1;
2574         send_directory(ignore_filter_rules ? -2 : -1, dirlist, dirname, dlen, 0);
2575         xfer_dirs = save_xfer_dirs;
2576         recurse = save_recurse;
2577         if (do_progress)
2578                 flist_count_offset += dirlist->count;
2579
2580         dirlist->sorted = dirlist->files;
2581         clean_flist(dirlist, 0);
2582
2583         if (verbose > 3)
2584                 output_flist(dirlist);
2585
2586         return dirlist;
2587 }