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