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 static int dir_count = 0;
 101
 102 static void clean_flist(struct file_list *flist, int strip_root);
 103 static void output_flist(struct file_list *flist);
 104
 105 void init_flist(void)
 106 {
 107         if (verbose > 4) {
 108                 rprintf(FINFO, "FILE_STRUCT_LEN=%d, EXTRA_LEN=%d\n",
 109                         (int)FILE_STRUCT_LEN, (int)EXTRA_LEN);
 110         }
 111         checksum_len = protocol_version < 21 ? 2
 112                      : protocol_version < 30 ? MD4_DIGEST_LEN
 113                      : MD5_DIGEST_LEN;
 114 }
 115
 116 static int show_filelist_p(void)
 117 {
 118         return verbose && xfer_dirs && !am_server && !inc_recurse;
 119 }
 120
 121 static void start_filelist_progress(char *kind)
 122 {
 123         rprintf(FCLIENT, "%s ... ", kind);
 124         if (verbose > 1 || do_progress)
 125                 rprintf(FCLIENT, "\n");
 126         rflush(FINFO);
 127 }
 128
 129 static void emit_filelist_progress(int count)
 130 {
 131         rprintf(FCLIENT, " %d files...\r", count);
 132 }
 133
 134 static void maybe_emit_filelist_progress(int count)
 135 {
 136         if (do_progress && show_filelist_p() && (count % 100) == 0)
 137                 emit_filelist_progress(count);
 138 }
 139
 140 static void finish_filelist_progress(const struct file_list *flist)
 141 {
 142         if (do_progress) {
 143                 /* This overwrites the progress line */
 144                 rprintf(FINFO, "%d file%sto consider\n",
 145                         flist->count, flist->count == 1 ? " " : "s ");
 146         } else
 147                 rprintf(FINFO, "done\n");
 148 }
 149
 150 void show_flist_stats(void)
 151 {
 152         /* Nothing yet */
 153 }
 154
 155 static void list_file_entry(struct file_struct *f)
 156 {
 157         char permbuf[PERMSTRING_SIZE];
 158         double len;
 159
 160         if (!F_IS_ACTIVE(f)) {
 161                 /* this can happen if duplicate names were removed */
 162                 return;
 163         }
 164
 165         permstring(permbuf, f->mode);
 166         len = F_LENGTH(f);
 167
 168         /* TODO: indicate '+' if the entry has an ACL. */
 169
 170 #ifdef SUPPORT_LINKS
 171         if (preserve_links && S_ISLNK(f->mode)) {
 172                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
 173                         permbuf, len, timestring(f->modtime),
 174                         f_name(f, NULL), F_SYMLINK(f));
 175         } else
 176 #endif
 177         {
 178                 rprintf(FINFO, "%s %11.0f %s %s\n",
 179                         permbuf, len, timestring(f->modtime),
 180                         f_name(f, NULL));
 181         }
 182 }
 183
 184 /* Stat either a symlink or its referent, depending on the settings of
 185  * copy_links, copy_unsafe_links, etc.  Returns -1 on error, 0 on success.
 186  *
 187  * If path is the name of a symlink, then the linkbuf buffer (which must hold
 188  * MAXPATHLEN chars) will be set to the symlink's target string.
 189  *
 190  * The stat structure pointed to by stp will contain information about the
 191  * link or the referent as appropriate, if they exist. */
 192 static int readlink_stat(const char *path, STRUCT_STAT *stp, char *linkbuf)
 193 {
 194 #ifdef SUPPORT_LINKS
 195         if (link_stat(path, stp, copy_dirlinks) < 0)
 196                 return -1;
 197         if (S_ISLNK(stp->st_mode)) {
 198                 int llen = readlink(path, linkbuf, MAXPATHLEN - 1);
 199                 if (llen < 0)
 200                         return -1;
 201                 linkbuf[llen] = '\0';
 202                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 203                         if (verbose > 1) {
 204                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 205                                         path, linkbuf);
 206                         }
 207                         return x_stat(path, stp, NULL);
 208                 }
 209         }
 210         return 0;
 211 #else
 212         return x_stat(path, stp, NULL);
 213 #endif
 214 }
 215
 216 int link_stat(const char *path, STRUCT_STAT *stp, int follow_dirlinks)
 217 {
 218 #ifdef SUPPORT_LINKS
 219         if (copy_links)
 220                 return x_stat(path, stp, NULL);
 221         if (x_lstat(path, stp, NULL) < 0)
 222                 return -1;
 223         if (follow_dirlinks && S_ISLNK(stp->st_mode)) {
 224                 STRUCT_STAT st;
 225                 if (x_stat(path, &st, NULL) == 0 && S_ISDIR(st.st_mode))
 226                         *stp = st;
 227         }
 228         return 0;
 229 #else
 230         return x_stat(path, stp, NULL);
 231 #endif
 232 }
 233
 234 /* This function is used to check if a file should be included/excluded
 235  * from the list of files based on its name and type etc.  The value of
 236  * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
 237 static int is_excluded(char *fname, int is_dir, int filter_level)
 238 {
 239 #if 0 /* This currently never happens, so avoid a useless compare. */
 240         if (filter_level == NO_FILTERS)
 241                 return 0;
 242 #endif
 243         if (fname) {
 244                 /* never exclude '.', even if somebody does --exclude '*' */
 245                 if (fname[0] == '.' && !fname[1])
 246                         return 0;
 247                 /* Handle the -R version of the '.' dir. */
 248                 if (fname[0] == '/') {
 249                         int len = strlen(fname);
 250                         if (fname[len-1] == '.' && fname[len-2] == '/')
 251                                 return 0;
 252                 }
 253         }
 254         if (server_filter_list.head
 255             && check_filter(&server_filter_list, fname, is_dir) < 0)
 256                 return 1;
 257         if (filter_level != ALL_FILTERS)
 258                 return 0;
 259         if (filter_list.head
 260             && check_filter(&filter_list, fname, is_dir) < 0)
 261                 return 1;
 262         return 0;
 263 }
 264
 265 static void send_directory(int f, struct file_list *flist,
 266                            char *fbuf, int len, int flags);
 267
 268 static const char *pathname, *orig_dir;
 269 static int pathname_len;
 270
 271
 272 /* Make sure flist can hold at least flist->count + extra entries. */
 273 static void flist_expand(struct file_list *flist, int extra)
 274 {
 275         struct file_struct **new_ptr;
 276
 277         if (flist->count + extra <= flist->malloced)
 278                 return;
 279
 280         if (flist->malloced < FLIST_START)
 281                 flist->malloced = FLIST_START;
 282         else if (flist->malloced >= FLIST_LINEAR)
 283                 flist->malloced += FLIST_LINEAR;
 284         else
 285                 flist->malloced *= 2;
 286
 287         /* In case count jumped or we are starting the list
 288          * with a known size just set it. */
 289         if (flist->malloced < flist->count + extra)
 290                 flist->malloced = flist->count + extra;
 291
 292         new_ptr = realloc_array(flist->files, struct file_struct *,
 293                                 flist->malloced);
 294
 295         if (verbose >= 2 && flist->malloced != FLIST_START) {
 296                 rprintf(FCLIENT, "[%s] expand file_list to %.0f bytes, did%s move\n",
 297                     who_am_i(),
 298                     (double)sizeof flist->files[0] * flist->malloced,
 299                     (new_ptr == flist->files) ? " not" : "");
 300         }
 301
 302         flist->files = new_ptr;
 303
 304         if (!flist->files)
 305                 out_of_memory("flist_expand");
 306 }
 307
 308 int push_pathname(const char *dir, int len)
 309 {
 310         if (dir == pathname)
 311                 return 1;
 312
 313         if (!orig_dir)
 314                 orig_dir = strdup(curr_dir);
 315
 316         if (pathname && !pop_dir(orig_dir)) {
 317                 rsyserr(FERROR, errno, "pop_dir %s failed",
 318                         full_fname(orig_dir));
 319                 exit_cleanup(RERR_FILESELECT);
 320         }
 321
 322         if (dir && !push_dir(dir, 0)) {
 323                 io_error |= IOERR_GENERAL;
 324                 rsyserr(FERROR, errno, "push_dir %s failed in %s",
 325                         full_fname(dir), curr_dir);
 326                 return 0;
 327         }
 328
 329         pathname = dir;
 330         pathname_len = len >= 0 ? len : dir ? (int)strlen(dir) : 0;
 331
 332         return 1;
 333 }
 334
 335 static void send_file_entry(int f, struct file_struct *file, int ndx)
 336 {
 337         static time_t modtime;
 338         static mode_t mode;
 339         static int64 dev;
 340         static dev_t rdev;
 341         static uint32 rdev_major;
 342         static uid_t uid;
 343         static gid_t gid;
 344         static char *user_name, *group_name;
 345         static char lastname[MAXPATHLEN];
 346         char fname[MAXPATHLEN];
 347         int first_hlink_ndx = -1;
 348         int l1, l2;
 349         int flags;
 350
 351 #ifdef ICONV_OPTION
 352         if (ic_send != (iconv_t)-1) {
 353                 ICONV_CONST char *ibuf;
 354                 char *obuf = fname;
 355                 size_t ocnt = MAXPATHLEN, icnt;
 356
 357                 iconv(ic_send, NULL,0, NULL,0);
 358                 if ((ibuf = (ICONV_CONST char *)file->dirname) != NULL) {
 359                     icnt = strlen(ibuf);
 360                     ocnt--; /* pre-subtract the space for the '/' */
 361                     if (iconv(ic_send, &ibuf,&icnt, &obuf,&ocnt) == (size_t)-1)
 362                         goto convert_error;
 363                     *obuf++ = '/';
 364                 }
 365
 366                 ibuf = (ICONV_CONST char *)file->basename;
 367                 icnt = strlen(ibuf);
 368                 if (iconv(ic_send, &ibuf,&icnt, &obuf,&ocnt) == (size_t)-1) {
 369                   convert_error:
 370                         io_error |= IOERR_GENERAL;
 371                         rprintf(FINFO,
 372                             "[%s] cannot convert filename: %s (%s)\n",
 373                             who_am_i(), f_name(file, fname), strerror(errno));
 374                         return;
 375                 }
 376                 *obuf = '\0';
 377         } else
 378 #endif
 379                 f_name(file, fname);
 380
 381         flags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */
 382
 383         if (file->mode == mode)
 384                 flags |= XMIT_SAME_MODE;
 385         else
 386                 mode = file->mode;
 387         if ((preserve_devices && IS_DEVICE(mode))
 388          || (preserve_specials && IS_SPECIAL(mode))) {
 389                 if (protocol_version < 28) {
 390                         if (tmp_rdev == rdev)
 391                                 flags |= XMIT_SAME_RDEV_pre28;
 392                         else
 393                                 rdev = tmp_rdev;
 394                 } else {
 395                         rdev = tmp_rdev;
 396                         if ((uint32)major(rdev) == rdev_major)
 397                                 flags |= XMIT_SAME_RDEV_MAJOR;
 398                         else
 399                                 rdev_major = major(rdev);
 400                         if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu)
 401                                 flags |= XMIT_RDEV_MINOR_8_pre30;
 402                 }
 403         } else if (protocol_version < 28)
 404                 rdev = MAKEDEV(0, 0);
 405         if (preserve_uid) {
 406                 if ((uid_t)F_OWNER(file) == uid && *lastname)
 407                         flags |= XMIT_SAME_UID;
 408                 else {
 409                         uid = F_OWNER(file);
 410                         if (preserve_uid && !numeric_ids) {
 411                                 user_name = add_uid(uid);
 412                                 if (inc_recurse && user_name)
 413                                         flags |= XMIT_USER_NAME_FOLLOWS;
 414                         }
 415                 }
 416         }
 417         if (preserve_gid) {
 418                 if ((gid_t)F_GROUP(file) == gid && *lastname)
 419                         flags |= XMIT_SAME_GID;
 420                 else {
 421                         gid = F_GROUP(file);
 422                         if (preserve_gid && !numeric_ids) {
 423                                 group_name = add_gid(gid);
 424                                 if (inc_recurse && group_name)
 425                                         flags |= XMIT_GROUP_NAME_FOLLOWS;
 426                         }
 427                 }
 428         }
 429         if (file->modtime == modtime)
 430                 flags |= XMIT_SAME_TIME;
 431         else
 432                 modtime = file->modtime;
 433
 434 #ifdef SUPPORT_HARD_LINKS
 435         if (tmp_dev != 0) {
 436                 if (protocol_version >= 30) {
 437                         struct idev_node *np = idev_node(tmp_dev, tmp_ino);
 438                         first_hlink_ndx = (int32)(long)np->data - 1;
 439                         if (first_hlink_ndx < 0) {
 440                                 np->data = (void*)(long)(ndx + 1);
 441                                 flags |= XMIT_HLINK_FIRST;
 442                         }
 443                         flags |= XMIT_HLINKED;
 444                 } else {
 445                         if (tmp_dev == dev) {
 446                                 if (protocol_version >= 28)
 447                                         flags |= XMIT_SAME_DEV_pre30;
 448                         } else
 449                                 dev = tmp_dev;
 450                         flags |= XMIT_HLINKED;
 451                 }
 452         }
 453 #endif
 454
 455         for (l1 = 0;
 456             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 457             l1++) {}
 458         l2 = strlen(fname+l1);
 459
 460         if (l1 > 0)
 461                 flags |= XMIT_SAME_NAME;
 462         if (l2 > 255)
 463                 flags |= XMIT_LONG_NAME;
 464
 465         /* We must make sure we don't send a zero flag byte or the
 466          * other end will terminate the flist transfer.  Note that
 467          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 468          * it's harmless way to add a bit to the first flag byte. */
 469         if (protocol_version >= 28) {
 470                 if (!flags && !S_ISDIR(mode))
 471                         flags |= XMIT_TOP_DIR;
 472                 if ((flags & 0xFF00) || !flags) {
 473                         flags |= XMIT_EXTENDED_FLAGS;
 474                         write_shortint(f, flags);
 475                 } else
 476                         write_byte(f, flags);
 477         } else {
 478                 if (!(flags & 0xFF))
 479                         flags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
 480                 write_byte(f, flags);
 481         }
 482         if (flags & XMIT_SAME_NAME)
 483                 write_byte(f, l1);
 484         if (flags & XMIT_LONG_NAME)
 485                 write_varint30(f, l2);
 486         else
 487                 write_byte(f, l2);
 488         write_buf(f, fname + l1, l2);
 489
 490         if (first_hlink_ndx >= 0) {
 491                 write_varint30(f, first_hlink_ndx);
 492                 goto the_end;
 493         }
 494
 495         write_varlong30(f, F_LENGTH(file), 3);
 496         if (!(flags & XMIT_SAME_TIME)) {
 497                 if (protocol_version >= 30)
 498                         write_varlong(f, modtime, 4);
 499                 else
 500                         write_int(f, modtime);
 501         }
 502         if (!(flags & XMIT_SAME_MODE))
 503                 write_int(f, to_wire_mode(mode));
 504         if (preserve_uid && !(flags & XMIT_SAME_UID)) {
 505                 if (protocol_version < 30)
 506                         write_int(f, uid);
 507                 else {
 508                         write_varint(f, uid);
 509                         if (flags & XMIT_USER_NAME_FOLLOWS) {
 510                                 int len = strlen(user_name);
 511                                 write_byte(f, len);
 512                                 write_buf(f, user_name, len);
 513                         }
 514                 }
 515         }
 516         if (preserve_gid && !(flags & XMIT_SAME_GID)) {
 517                 if (protocol_version < 30)
 518                         write_int(f, gid);
 519                 else {
 520                         write_varint(f, gid);
 521                         if (flags & XMIT_GROUP_NAME_FOLLOWS) {
 522                                 int len = strlen(group_name);
 523                                 write_byte(f, len);
 524                                 write_buf(f, group_name, len);
 525                         }
 526                 }
 527         }
 528         if ((preserve_devices && IS_DEVICE(mode))
 529          || (preserve_specials && IS_SPECIAL(mode))) {
 530                 if (protocol_version < 28) {
 531                         if (!(flags & XMIT_SAME_RDEV_pre28))
 532                                 write_int(f, (int)rdev);
 533                 } else {
 534                         if (!(flags & XMIT_SAME_RDEV_MAJOR))
 535                                 write_varint30(f, major(rdev));
 536                         if (protocol_version >= 30)
 537                                 write_varint(f, minor(rdev));
 538                         else if (flags & XMIT_RDEV_MINOR_8_pre30)
 539                                 write_byte(f, minor(rdev));
 540                         else
 541                                 write_int(f, minor(rdev));
 542                 }
 543         }
 544
 545 #ifdef SUPPORT_LINKS
 546         if (preserve_links && S_ISLNK(mode)) {
 547                 const char *sl = F_SYMLINK(file);
 548                 int len = strlen(sl);
 549                 write_varint30(f, len);
 550                 write_buf(f, sl, len);
 551         }
 552 #endif
 553
 554 #ifdef SUPPORT_HARD_LINKS
 555         if (tmp_dev != 0 && protocol_version < 30) {
 556                 if (protocol_version < 26) {
 557                         /* 32-bit dev_t and ino_t */
 558                         write_int(f, (int32)dev);
 559                         write_int(f, (int32)tmp_ino);
 560                 } else {
 561                         /* 64-bit dev_t and ino_t */
 562                         if (!(flags & XMIT_SAME_DEV_pre30))
 563                                 write_longint(f, dev);
 564                         write_longint(f, tmp_ino);
 565                 }
 566         }
 567 #endif
 568
 569         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 570                 const char *sum;
 571                 if (S_ISREG(mode))
 572                         sum = tmp_sum;
 573                 else {
 574                         /* Prior to 28, we sent a useless set of nulls. */
 575                         sum = empty_sum;
 576                 }
 577                 write_buf(f, sum, checksum_len);
 578         }
 579
 580   the_end:
 581         strlcpy(lastname, fname, MAXPATHLEN);
 582
 583         if (S_ISREG(mode) || S_ISLNK(mode))
 584                 stats.total_size += F_LENGTH(file);
 585 }
 586
 587 static struct file_struct *recv_file_entry(struct file_list *flist,
 588                                            int xflags, int f)
 589 {
 590         static int64 modtime;
 591         static mode_t mode;
 592         static int64 dev;
 593         static dev_t rdev;
 594         static uint32 rdev_major;
 595         static uid_t uid;
 596         static gid_t gid;
 597         static uint16 gid_flags;
 598         static char lastname[MAXPATHLEN], *lastdir;
 599         static int lastdir_depth, lastdir_len = -1;
 600         static unsigned int del_hier_name_len = 0;
 601         static int in_del_hier = 0;
 602         char thisname[MAXPATHLEN];
 603         unsigned int l1 = 0, l2 = 0;
 604         int alloc_len, basename_len, linkname_len;
 605         int extra_len = file_extra_cnt * EXTRA_LEN;
 606         int first_hlink_ndx = -1;
 607         OFF_T file_length;
 608         const char *basename;
 609         struct file_struct *file;
 610         alloc_pool_t *pool;
 611         char *bp;
 612
 613         if (xflags & XMIT_SAME_NAME)
 614                 l1 = read_byte(f);
 615
 616         if (xflags & XMIT_LONG_NAME)
 617                 l2 = read_varint30(f);
 618         else
 619                 l2 = read_byte(f);
 620
 621         if (l2 >= MAXPATHLEN - l1) {
 622                 rprintf(FERROR,
 623                         "overflow: xflags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
 624                         xflags, l1, l2, lastname, who_am_i());
 625                 overflow_exit("recv_file_entry");
 626         }
 627
 628         strlcpy(thisname, lastname, l1 + 1);
 629         read_sbuf(f, &thisname[l1], l2);
 630         thisname[l1 + l2] = 0;
 631
 632         /* Abuse basename_len for a moment... */
 633         basename_len = strlcpy(lastname, thisname, MAXPATHLEN);
 634
 635 #ifdef ICONV_OPTION
 636         if (ic_recv != (iconv_t)-1) {
 637                 char *obuf = thisname;
 638                 ICONV_CONST char *ibuf = (ICONV_CONST char *)lastname;
 639                 size_t ocnt = MAXPATHLEN, icnt = basename_len;
 640
 641                 if (icnt >= MAXPATHLEN) {
 642                         errno = E2BIG;
 643                         goto convert_error;
 644                 }
 645
 646                 iconv(ic_recv, NULL,0, NULL,0);
 647                 if (iconv(ic_recv, &ibuf,&icnt, &obuf,&ocnt) == (size_t)-1) {
 648                   convert_error:
 649                         io_error |= IOERR_GENERAL;
 650                         rprintf(FINFO,
 651                             "[%s] cannot convert filename: %s (%s)\n",
 652                             who_am_i(), lastname, strerror(errno));
 653                         obuf = thisname;
 654                 }
 655                 *obuf = '\0';
 656         }
 657 #endif
 658
 659         clean_fname(thisname, 0);
 660
 661         if (sanitize_paths)
 662                 sanitize_path(thisname, thisname, "", 0, NULL);
 663
 664         if ((basename = strrchr(thisname, '/')) != NULL) {
 665                 int len = basename++ - thisname;
 666                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
 667                         lastdir = new_array(char, len + 1);
 668                         memcpy(lastdir, thisname, len);
 669                         lastdir[len] = '\0';
 670                         lastdir_len = len;
 671                         lastdir_depth = count_dir_elements(lastdir);
 672                 }
 673         } else
 674                 basename = thisname;
 675         basename_len = strlen(basename) + 1; /* count the '\0' */
 676
 677 #ifdef SUPPORT_HARD_LINKS
 678         if (protocol_version >= 30
 679          && BITS_SETnUNSET(xflags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
 680                 struct file_struct *first;
 681                 first_hlink_ndx = read_varint30(f);
 682                 if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->count) {
 683                         rprintf(FERROR,
 684                                 "hard-link reference out of range: %d (%d)\n",
 685                                 first_hlink_ndx, flist->count);
 686                         exit_cleanup(RERR_PROTOCOL);
 687                 }
 688                 first = flist->files[first_hlink_ndx];
 689                 file_length = F_LENGTH(first);
 690                 modtime = first->modtime;
 691                 mode = first->mode;
 692                 if (preserve_uid)
 693                         uid = F_OWNER(first);
 694                 if (preserve_gid)
 695                         gid = F_GROUP(first);
 696                 if ((preserve_devices && IS_DEVICE(mode))
 697                  || (preserve_specials && IS_SPECIAL(mode))) {
 698                         uint32 *devp = F_RDEV_P(first);
 699                         rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
 700                         extra_len += 2 * EXTRA_LEN;
 701                 }
 702                 if (preserve_links && S_ISLNK(mode))
 703                         linkname_len = strlen(F_SYMLINK(first)) + 1;
 704                 else
 705                         linkname_len = 0;
 706                 goto create_object;
 707         }
 708 #endif
 709
 710         file_length = read_varlong30(f, 3);
 711         if (!(xflags & XMIT_SAME_TIME)) {
 712                 if (protocol_version >= 30) {
 713                         modtime = read_varlong(f, 4);
 714 #if SIZEOF_TIME_T < SIZEOF_INT64
 715                         if ((modtime > INT_MAX || modtime < INT_MIN) && !am_generator) {
 716                                 rprintf(FERROR,
 717                                     "Time value of %s truncated on receiver.\n",
 718                                     lastname);
 719                         }
 720 #endif
 721                 } else
 722                         modtime = read_int(f);
 723         }
 724         if (!(xflags & XMIT_SAME_MODE))
 725                 mode = from_wire_mode(read_int(f));
 726
 727         if (chmod_modes && !S_ISLNK(mode))
 728                 mode = tweak_mode(mode, chmod_modes);
 729
 730         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
 731                 if (protocol_version < 30)
 732                         uid = (uid_t)read_int(f);
 733                 else {
 734                         uid = (uid_t)read_varint(f);
 735                         if (xflags & XMIT_USER_NAME_FOLLOWS)
 736                                 uid = recv_user_name(f, uid);
 737                         else if (inc_recurse && am_root && !numeric_ids)
 738                                 uid = match_uid(uid);
 739                 }
 740         }
 741         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
 742                 if (protocol_version < 30)
 743                         gid = (gid_t)read_int(f);
 744                 else {
 745                         gid = (gid_t)read_varint(f);
 746                         gid_flags = 0;
 747                         if (xflags & XMIT_GROUP_NAME_FOLLOWS)
 748                                 gid = recv_group_name(f, gid, &gid_flags);
 749                         else if (inc_recurse && (!am_root || !numeric_ids))
 750                                 gid = match_gid(gid, &gid_flags);
 751                 }
 752         }
 753
 754         if ((preserve_devices && IS_DEVICE(mode))
 755          || (preserve_specials && IS_SPECIAL(mode))) {
 756                 if (protocol_version < 28) {
 757                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 758                                 rdev = (dev_t)read_int(f);
 759                 } else {
 760                         uint32 rdev_minor;
 761                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 762                                 rdev_major = read_varint30(f);
 763                         if (protocol_version >= 30)
 764                                 rdev_minor = read_varint(f);
 765                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 766                                 rdev_minor = read_byte(f);
 767                         else
 768                                 rdev_minor = read_int(f);
 769                         rdev = MAKEDEV(rdev_major, rdev_minor);
 770                 }
 771                 extra_len += 2 * EXTRA_LEN;
 772                 file_length = 0;
 773         } else if (protocol_version < 28)
 774                 rdev = MAKEDEV(0, 0);
 775
 776 #ifdef SUPPORT_LINKS
 777         if (preserve_links && S_ISLNK(mode)) {
 778                 linkname_len = read_varint30(f) + 1; /* count the '\0' */
 779                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 780                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 781                                 linkname_len - 1);
 782                         overflow_exit("recv_file_entry");
 783                 }
 784         }
 785         else
 786 #endif
 787                 linkname_len = 0;
 788
 789 #ifdef SUPPORT_HARD_LINKS
 790   create_object:
 791         if (preserve_hard_links) {
 792                 if (protocol_version < 28 && S_ISREG(mode))
 793                         xflags |= XMIT_HLINKED;
 794                 if (xflags & XMIT_HLINKED)
 795                         extra_len += EXTRA_LEN;
 796         }
 797 #endif
 798
 799 #ifdef SUPPORT_ACLS
 800         /* We need one or two index int32s when we're preserving ACLs. */
 801         if (preserve_acls)
 802                 extra_len += (S_ISDIR(mode) ? 2 : 1) * EXTRA_LEN;
 803 #endif
 804
 805         if (always_checksum && S_ISREG(mode))
 806                 extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
 807
 808         if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
 809                 extra_len += EXTRA_LEN;
 810
 811 #if EXTRA_ROUNDING > 0
 812         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
 813                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
 814 #endif
 815
 816         if (inc_recurse && S_ISDIR(mode)) {
 817                 if (one_file_system) {
 818                         /* Room to save the dir's device for -x */
 819                         extra_len += 2 * EXTRA_LEN;
 820                 }
 821                 pool = dir_flist->file_pool;
 822         } else
 823                 pool = flist->file_pool;
 824
 825         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
 826                   + linkname_len;
 827         bp = pool_alloc(pool, alloc_len, "recv_file_entry");
 828
 829         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
 830         bp += extra_len;
 831         file = (struct file_struct *)bp;
 832         bp += FILE_STRUCT_LEN;
 833
 834         memcpy(bp, basename, basename_len);
 835         bp += basename_len + linkname_len; /* skip space for symlink too */
 836
 837 #ifdef SUPPORT_HARD_LINKS
 838         if (xflags & XMIT_HLINKED)
 839                 file->flags |= FLAG_HLINKED;
 840 #endif
 841         file->modtime = (time_t)modtime;
 842         file->len32 = (uint32)file_length;
 843         if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
 844                 file->flags |= FLAG_LENGTH64;
 845                 OPT_EXTRA(file, 0)->unum = (uint32)(file_length >> 32);
 846         }
 847         file->mode = mode;
 848         if (preserve_uid)
 849                 F_OWNER(file) = uid;
 850         if (preserve_gid) {
 851                 F_GROUP(file) = gid;
 852                 file->flags |= gid_flags;
 853         }
 854 #ifdef ICONV_OPTION
 855         if (ic_ndx)
 856                 F_NDX(file) = flist->count + flist->ndx_start;
 857 #endif
 858
 859         if (basename != thisname) {
 860                 file->dirname = lastdir;
 861                 F_DEPTH(file) = lastdir_depth + 1;
 862         } else
 863                 F_DEPTH(file) = 1;
 864
 865         if (S_ISDIR(mode)) {
 866                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
 867                         F_DEPTH(file)--;
 868                 if (xflags & XMIT_TOP_DIR) {
 869                         in_del_hier = recurse;
 870                         del_hier_name_len = F_DEPTH(file) == 0 ? 0 : l1 + l2;
 871                         if (relative_paths && del_hier_name_len > 2
 872                             && lastname[del_hier_name_len-1] == '.'
 873                             && lastname[del_hier_name_len-2] == '/')
 874                                 del_hier_name_len -= 2;
 875                         file->flags |= FLAG_TOP_DIR | FLAG_XFER_DIR;
 876                 } else if (in_del_hier) {
 877                         if (!relative_paths || !del_hier_name_len
 878                          || (l1 >= del_hier_name_len
 879                           && lastname[del_hier_name_len] == '/'))
 880                                 file->flags |= FLAG_XFER_DIR;
 881                         else
 882                                 in_del_hier = 0;
 883                 }
 884         }
 885
 886         if ((preserve_devices && IS_DEVICE(mode))
 887          || (preserve_specials && IS_SPECIAL(mode))) {
 888                 uint32 *devp = F_RDEV_P(file);
 889                 DEV_MAJOR(devp) = major(rdev);
 890                 DEV_MINOR(devp) = minor(rdev);
 891         }
 892
 893 #ifdef SUPPORT_LINKS
 894         if (linkname_len) {
 895                 bp = (char*)file->basename + basename_len;
 896                 if (first_hlink_ndx >= 0) {
 897                         struct file_struct *first = flist->files[first_hlink_ndx];
 898                         memcpy(bp, F_SYMLINK(first), linkname_len);
 899                 } else
 900                         read_sbuf(f, bp, linkname_len - 1);
 901                 if (sanitize_paths)
 902                         sanitize_path(bp, bp, "", lastdir_depth, NULL);
 903         }
 904 #endif
 905
 906 #ifdef SUPPORT_HARD_LINKS
 907         if (preserve_hard_links && xflags & XMIT_HLINKED) {
 908                 if (protocol_version >= 30) {
 909                         F_HL_GNUM(file) = xflags & XMIT_HLINK_FIRST
 910                                         ? flist->count : first_hlink_ndx;
 911                 } else {
 912                         static int32 cnt = 0;
 913                         struct idev_node *np;
 914                         int64 ino;
 915                         int32 ndx;
 916                         if (protocol_version < 26) {
 917                                 dev = read_int(f);
 918                                 ino = read_int(f);
 919                         } else {
 920                                 if (!(xflags & XMIT_SAME_DEV_pre30))
 921                                         dev = read_longint(f);
 922                                 ino = read_longint(f);
 923                         }
 924                         np = idev_node(dev, ino);
 925                         ndx = (int32)(long)np->data - 1;
 926                         if (ndx < 0) {
 927                                 ndx = cnt++;
 928                                 np->data = (void*)(long)cnt;
 929                         }
 930                         F_HL_GNUM(file) = ndx;
 931                 }
 932         }
 933 #endif
 934
 935         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 936                 if (S_ISREG(mode))
 937                         bp = (char*)F_SUM(file);
 938                 else {
 939                         /* Prior to 28, we get a useless set of nulls. */
 940                         bp = tmp_sum;
 941                 }
 942                 if (first_hlink_ndx >= 0) {
 943                         struct file_struct *first = flist->files[first_hlink_ndx];
 944                         memcpy(bp, F_SUM(first), checksum_len);
 945                 } else
 946                         read_buf(f, bp, checksum_len);
 947         }
 948
 949 #ifdef SUPPORT_ACLS
 950         if (preserve_acls && !S_ISLNK(mode))
 951                 receive_acl(file, f);
 952 #endif
 953 #ifdef SUPPORT_XATTRS
 954         if (preserve_xattrs)
 955                 receive_xattr(file, f );
 956 #endif
 957
 958         if (S_ISREG(mode) || S_ISLNK(mode))
 959                 stats.total_size += file_length;
 960
 961         return file;
 962 }
 963
 964 /**
 965  * Create a file_struct for a named file by reading its stat()
 966  * information and performing extensive checks against global
 967  * options.
 968  *
 969  * @return the new file, or NULL if there was an error or this file
 970  * should be excluded.
 971  *
 972  * @todo There is a small optimization opportunity here to avoid
 973  * stat()ing the file in some circumstances, which has a certain cost.
 974  * We are called immediately after doing readdir(), and so we may
 975  * already know the d_type of the file.  We could for example avoid
 976  * statting directories if we're not recursing, but this is not a very
 977  * important case.  Some systems may not have d_type.
 978  **/
 979 struct file_struct *make_file(const char *fname, struct file_list *flist,
 980                               STRUCT_STAT *stp, int flags, int filter_level)
 981 {
 982         static char *lastdir;
 983         static int lastdir_len = -1;
 984         struct file_struct *file;
 985         STRUCT_STAT st;
 986         char thisname[MAXPATHLEN];
 987         char linkname[MAXPATHLEN];
 988         int alloc_len, basename_len, linkname_len;
 989         int extra_len = file_extra_cnt * EXTRA_LEN;
 990         const char *basename;
 991         alloc_pool_t *pool;
 992         char *bp;
 993
 994         if (strlcpy(thisname, fname, sizeof thisname)
 995             >= sizeof thisname - pathname_len) {
 996                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
 997                 return NULL;
 998         }
 999         clean_fname(thisname, 0);
1000         if (sanitize_paths)
1001                 sanitize_path(thisname, thisname, "", 0, NULL);
1002
1003         if (stp && S_ISDIR(stp->st_mode)) {
1004                 st = *stp; /* Needed for "symlink/." with --relative. */
1005                 *linkname = '\0'; /* make IBM code checker happy */
1006         } else if (readlink_stat(thisname, &st, linkname) != 0) {
1007                 int save_errno = errno;
1008                 /* See if file is excluded before reporting an error. */
1009                 if (filter_level != NO_FILTERS
1010                  && (is_excluded(thisname, 0, filter_level)
1011                   || is_excluded(thisname, 1, filter_level))) {
1012                         if (ignore_perishable && save_errno != ENOENT)
1013                                 non_perishable_cnt++;
1014                         return NULL;
1015                 }
1016                 if (save_errno == ENOENT) {
1017 #ifdef SUPPORT_LINKS
1018                         /* Avoid "vanished" error if symlink points nowhere. */
1019                         if (copy_links && x_lstat(thisname, &st, NULL) == 0
1020                             && S_ISLNK(st.st_mode)) {
1021                                 io_error |= IOERR_GENERAL;
1022                                 rprintf(FERROR, "symlink has no referent: %s\n",
1023                                         full_fname(thisname));
1024                         } else
1025 #endif
1026                         {
1027                                 enum logcode c = am_daemon && protocol_version < 28
1028                                     ? FERROR : FINFO;
1029                                 io_error |= IOERR_VANISHED;
1030                                 rprintf(c, "file has vanished: %s\n",
1031                                         full_fname(thisname));
1032                         }
1033                 } else {
1034                         io_error |= IOERR_GENERAL;
1035                         rsyserr(FERROR, save_errno, "readlink %s failed",
1036                                 full_fname(thisname));
1037                 }
1038                 return NULL;
1039         }
1040
1041         /* backup.c calls us with filter_level set to NO_FILTERS. */
1042         if (filter_level == NO_FILTERS)
1043                 goto skip_filters;
1044
1045         if (S_ISDIR(st.st_mode) && !xfer_dirs) {
1046                 rprintf(FINFO, "skipping directory %s\n", thisname);
1047                 return NULL;
1048         }
1049
1050         /* -x only affects directories because we need to avoid recursing
1051          * into a mount-point directory, not to avoid copying a symlinked
1052          * file if -L (or similar) was specified. */
1053         if (one_file_system && st.st_dev != filesystem_dev
1054          && S_ISDIR(st.st_mode)) {
1055                 if (one_file_system > 1) {
1056                         if (verbose > 2) {
1057                                 rprintf(FINFO, "skipping mount-point dir %s\n",
1058                                         thisname);
1059                         }
1060                         return NULL;
1061                 }
1062                 flags |= FLAG_MOUNT_DIR;
1063         }
1064
1065         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level)) {
1066                 if (ignore_perishable)
1067                         non_perishable_cnt++;
1068                 return NULL;
1069         }
1070
1071         if (lp_ignore_nonreadable(module_id)) {
1072 #ifdef SUPPORT_LINKS
1073                 if (!S_ISLNK(st.st_mode))
1074 #endif
1075                         if (access(thisname, R_OK) != 0)
1076                                 return NULL;
1077         }
1078
1079   skip_filters:
1080
1081         /* Only divert a directory in the main transfer. */
1082         if (flist) {
1083                 if (flist->prev && S_ISDIR(st.st_mode)
1084                  && flags & FLAG_DIVERT_DIRS) {
1085                         /* Room for parent/sibling/next-child info. */
1086                         extra_len += 3 * EXTRA_LEN;
1087                         dir_count++;
1088                         pool = dir_flist->file_pool;
1089                 } else
1090                         pool = flist->file_pool;
1091         } else
1092                 pool = NULL;
1093
1094         if (verbose > 2) {
1095                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
1096                         who_am_i(), thisname, filter_level);
1097         }
1098
1099         if ((basename = strrchr(thisname, '/')) != NULL) {
1100                 int len = basename++ - thisname;
1101                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
1102                         lastdir = new_array(char, len + 1);
1103                         memcpy(lastdir, thisname, len);
1104                         lastdir[len] = '\0';
1105                         lastdir_len = len;
1106                 }
1107         } else
1108                 basename = thisname;
1109         basename_len = strlen(basename) + 1; /* count the '\0' */
1110
1111 #ifdef SUPPORT_LINKS
1112         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
1113 #else
1114         linkname_len = 0;
1115 #endif
1116
1117         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
1118                 extra_len += EXTRA_LEN;
1119
1120 #if EXTRA_ROUNDING > 0
1121         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
1122                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
1123 #endif
1124
1125         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
1126                   + linkname_len;
1127         if (pool)
1128                 bp = pool_alloc(pool, alloc_len, "make_file");
1129         else {
1130                 if (!(bp = new_array(char, alloc_len)))
1131                         out_of_memory("make_file");
1132         }
1133
1134         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
1135         bp += extra_len;
1136         file = (struct file_struct *)bp;
1137         bp += FILE_STRUCT_LEN;
1138
1139         memcpy(bp, basename, basename_len);
1140         bp += basename_len + linkname_len; /* skip space for symlink too */
1141
1142 #ifdef SUPPORT_HARD_LINKS
1143         if (preserve_hard_links && flist && flist->prev) {
1144                 if (protocol_version >= 28
1145                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
1146                  : S_ISREG(st.st_mode)) {
1147                         tmp_dev = st.st_dev;
1148                         tmp_ino = st.st_ino;
1149                 } else
1150                         tmp_dev = 0;
1151         }
1152 #endif
1153
1154 #ifdef HAVE_STRUCT_STAT_ST_RDEV
1155         if (IS_DEVICE(st.st_mode) || IS_SPECIAL(st.st_mode)) {
1156                 tmp_rdev = st.st_rdev;
1157                 st.st_size = 0;
1158         }
1159 #endif
1160
1161         file->flags = flags;
1162         file->modtime = st.st_mtime;
1163         file->len32 = (uint32)st.st_size;
1164         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
1165                 file->flags |= FLAG_LENGTH64;
1166                 OPT_EXTRA(file, 0)->unum = (uint32)(st.st_size >> 32);
1167         }
1168         file->mode = st.st_mode;
1169         if (preserve_uid)
1170                 F_OWNER(file) = st.st_uid;
1171         if (preserve_gid)
1172                 F_GROUP(file) = st.st_gid;
1173
1174         if (basename != thisname)
1175                 file->dirname = lastdir;
1176
1177 #ifdef SUPPORT_LINKS
1178         if (linkname_len) {
1179                 bp = (char*)file->basename + basename_len;
1180                 memcpy(bp, linkname, linkname_len);
1181         }
1182 #endif
1183
1184         if (always_checksum && am_sender && S_ISREG(st.st_mode))
1185                 file_checksum(thisname, tmp_sum, st.st_size);
1186
1187         F_PATHNAME(file) = pathname;
1188
1189         /* This code is only used by the receiver when it is building
1190          * a list of files for a delete pass. */
1191         if (keep_dirlinks && linkname_len && flist) {
1192                 STRUCT_STAT st2;
1193                 int save_mode = file->mode;
1194                 file->mode = S_IFDIR; /* Find a directory with our name. */
1195                 if (flist_find(dir_flist, file) >= 0
1196                  && x_stat(thisname, &st2, NULL) == 0 && S_ISDIR(st2.st_mode)) {
1197                         file->modtime = st2.st_mtime;
1198                         file->len32 = 0;
1199                         file->mode = st2.st_mode;
1200                         if (preserve_uid)
1201                                 F_OWNER(file) = st2.st_uid;
1202                         if (preserve_gid)
1203                                 F_GROUP(file) = st2.st_gid;
1204                 } else
1205                         file->mode = save_mode;
1206         }
1207
1208         if (basename_len == 0+1)
1209                 return NULL;
1210
1211 #ifdef ICONV_OPTION
1212         if (ic_ndx)
1213                 F_NDX(file) = dir_count - 1;
1214 #endif
1215
1216         return file;
1217 }
1218
1219 /* Only called for temporary file_struct entries created by make_file(). */
1220 void unmake_file(struct file_struct *file)
1221 {
1222         int extra_cnt = file_extra_cnt + LEN64_BUMP(file);
1223 #if EXTRA_ROUNDING > 0
1224         if (extra_cnt & EXTRA_ROUNDING)
1225                 extra_cnt = (extra_cnt | EXTRA_ROUNDING) + 1;
1226 #endif
1227         free(REQ_EXTRA(file, extra_cnt));
1228 }
1229
1230 static struct file_struct *send_file_name(int f, struct file_list *flist,
1231                                           char *fname, STRUCT_STAT *stp,
1232                                           int flags, int filter_flags)
1233 {
1234         struct file_struct *file;
1235 #if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
1236         statx sx;
1237 #endif
1238
1239         file = make_file(fname, flist, stp, flags, filter_flags);
1240         if (!file)
1241                 return NULL;
1242
1243         if (chmod_modes && !S_ISLNK(file->mode))
1244                 file->mode = tweak_mode(file->mode, chmod_modes);
1245
1246 #ifdef SUPPORT_ACLS
1247         if (preserve_acls && !S_ISLNK(file->mode) && f >= 0) {
1248                 sx.st.st_mode = file->mode;
1249                 sx.acc_acl = sx.def_acl = NULL;
1250                 if (get_acl(fname, &sx) < 0)
1251                         return NULL;
1252         }
1253 #endif
1254 #ifdef SUPPORT_XATTRS
1255         if (preserve_xattrs && f >= 0) {
1256                 sx.xattr = NULL;
1257                 if (get_xattr(fname, &sx) < 0)
1258                         return NULL;
1259         }
1260 #endif
1261
1262         maybe_emit_filelist_progress(flist->count + flist_count_offset);
1263
1264         flist_expand(flist, 1);
1265         flist->files[flist->count++] = file;
1266         if (f >= 0) {
1267                 send_file_entry(f, file, flist->count - 1);
1268 #ifdef SUPPORT_ACLS
1269                 if (preserve_acls && !S_ISLNK(file->mode)) {
1270                         send_acl(&sx, f);
1271                         free_acl(&sx);
1272                 }
1273 #endif
1274 #ifdef SUPPORT_XATTRS
1275                 if (preserve_xattrs) {
1276                         F_XATTR(file) = send_xattr(&sx, f);
1277                         free_xattr(&sx);
1278                 }
1279 #endif
1280         }
1281         return file;
1282 }
1283
1284 static void send_if_directory(int f, struct file_list *flist,
1285                               struct file_struct *file,
1286                               char *fbuf, unsigned int ol,
1287                               int flags)
1288 {
1289         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1290
1291         if (S_ISDIR(file->mode)
1292             && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) {
1293                 void *save_filters;
1294                 unsigned int len = strlen(fbuf);
1295                 if (len > 1 && fbuf[len-1] == '/')
1296                         fbuf[--len] = '\0';
1297                 if (len >= MAXPATHLEN - 1) {
1298                         io_error |= IOERR_GENERAL;
1299                         rprintf(FERROR, "skipping long-named directory: %s\n",
1300                                 full_fname(fbuf));
1301                         return;
1302                 }
1303                 save_filters = push_local_filters(fbuf, len);
1304                 send_directory(f, flist, fbuf, len, flags);
1305                 pop_local_filters(save_filters);
1306                 fbuf[ol] = '\0';
1307                 if (is_dot_dir)
1308                         fbuf[ol-1] = '.';
1309         }
1310 }
1311
1312 static int file_compare(struct file_struct **file1, struct file_struct **file2)
1313 {
1314         return f_name_cmp(*file1, *file2);
1315 }
1316
1317 /* We take an entire set of sibling dirs from the sorted flist and link them
1318  * into the tree, setting the appropriate parent/child/sibling pointers. */
1319 static void add_dirs_to_tree(int parent_ndx, struct file_list *from_flist,
1320                              int dir_cnt)
1321 {
1322         int i;
1323         int32 *dp = NULL;
1324         int32 *parent_dp = parent_ndx < 0 ? NULL
1325                          : F_DIRNODE_P(dir_flist->sorted[parent_ndx]);
1326
1327         flist_expand(dir_flist, dir_cnt);
1328         dir_flist->sorted = dir_flist->files;
1329
1330         for (i = 0; dir_cnt; i++) {
1331                 struct file_struct *file = from_flist->sorted[i];
1332
1333                 if (!S_ISDIR(file->mode))
1334                         continue;
1335
1336                 dir_flist->files[dir_flist->count++] = file;
1337                 dir_cnt--;
1338
1339                 if (!(file->flags & FLAG_XFER_DIR)
1340                  || file->flags & FLAG_MOUNT_DIR)
1341                         continue;
1342
1343                 if (dp)
1344                         DIR_NEXT_SIBLING(dp) = dir_flist->count - 1;
1345                 else if (parent_dp)
1346                         DIR_FIRST_CHILD(parent_dp) = dir_flist->count - 1;
1347                 else
1348                         send_dir_ndx = dir_flist->count - 1;
1349
1350                 dp = F_DIRNODE_P(file);
1351                 DIR_PARENT(dp) = parent_ndx;
1352                 DIR_FIRST_CHILD(dp) = -1;
1353         }
1354         if (dp)
1355                 DIR_NEXT_SIBLING(dp) = -1;
1356 }
1357
1358 /* This function is normally called by the sender, but the receiving side also
1359  * calls it from get_dirlist() with f set to -1 so that we just construct the
1360  * file list in memory without sending it over the wire.  Also, get_dirlist()
1361  * might call this with f set to -2, which also indicates that local filter
1362  * rules should be ignored. */
1363 static void send_directory(int f, struct file_list *flist, char *fbuf, int len,
1364                            int flags)
1365 {
1366         struct dirent *di;
1367         unsigned remainder;
1368         char *p;
1369         DIR *d;
1370         int divert_dirs = (flags & FLAG_DIVERT_DIRS) != 0;
1371         int start = flist->count;
1372         int filter_flags = f == -2 ? SERVER_FILTERS : ALL_FILTERS;
1373
1374         assert(flist != NULL);
1375
1376         if (!(d = opendir(fbuf))) {
1377                 io_error |= IOERR_GENERAL;
1378                 rsyserr(FERROR, errno, "opendir %s failed", full_fname(fbuf));
1379                 return;
1380         }
1381
1382         p = fbuf + len;
1383         if (len != 1 || *fbuf != '/')
1384                 *p++ = '/';
1385         *p = '\0';
1386         remainder = MAXPATHLEN - (p - fbuf);
1387
1388         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1389                 char *dname = d_name(di);
1390                 if (dname[0] == '.' && (dname[1] == '\0'
1391                     || (dname[1] == '.' && dname[2] == '\0')))
1392                         continue;
1393                 if (strlcpy(p, dname, remainder) >= remainder) {
1394                         io_error |= IOERR_GENERAL;
1395                         rprintf(FINFO,
1396                                 "cannot send long-named file %s\n",
1397                                 full_fname(fbuf));
1398                         continue;
1399                 }
1400
1401                 send_file_name(f, flist, fbuf, NULL, flags, filter_flags);
1402         }
1403
1404         fbuf[len] = '\0';
1405
1406         if (errno) {
1407                 io_error |= IOERR_GENERAL;
1408                 rsyserr(FERROR, errno, "readdir(%s)", full_fname(fbuf));
1409         }
1410
1411         closedir(d);
1412
1413         if (f >= 0 && recurse && !divert_dirs) {
1414                 int i, end = flist->count - 1;
1415                 /* send_if_directory() bumps flist->count, so use "end". */
1416                 for (i = start; i <= end; i++)
1417                         send_if_directory(f, flist, flist->files[i], fbuf, len, flags);
1418         }
1419 }
1420
1421 static void send1extra(int f, struct file_struct *file, struct file_list *flist)
1422 {
1423         char fbuf[MAXPATHLEN];
1424         int dlen;
1425
1426         f_name(file, fbuf);
1427         dlen = strlen(fbuf);
1428
1429         if (F_PATHNAME(file) != pathname) {
1430                 if (!push_pathname(F_PATHNAME(file), -1))
1431                         exit_cleanup(RERR_FILESELECT);
1432         }
1433
1434         change_local_filter_dir(fbuf, dlen, send_dir_depth);
1435
1436         send_directory(f, flist, fbuf, dlen, FLAG_DIVERT_DIRS | FLAG_XFER_DIR);
1437 }
1438
1439 void send_extra_file_list(int f, int at_least)
1440 {
1441         struct file_list *flist;
1442         int64 start_write;
1443         int future_cnt, save_io_error = io_error;
1444
1445         if (flist_eof)
1446                 return;
1447
1448         /* Keep sending data until we have the requested number of
1449          * files in the upcoming file-lists. */
1450         if (cur_flist->next) {
1451                 flist = first_flist->prev; /* the newest flist */
1452                 future_cnt = flist->count + flist->ndx_start
1453                            - cur_flist->next->ndx_start;
1454         } else
1455                 future_cnt = 0;
1456         while (future_cnt < at_least) {
1457                 struct file_struct *file = dir_flist->sorted[send_dir_ndx];
1458                 int dstart = dir_count;
1459                 int32 *dp;
1460
1461                 flist = flist_new(0, "send_extra_file_list");
1462                 start_write = stats.total_written;
1463
1464                 /* If this is the first of a set of duplicate dirs, we must
1465                  * send all the dirs together in a single file-list.  We must
1466                  * also send the index of the last dir in the header. */
1467                 if (file->flags & FLAG_DUPLICATE) {
1468                         int dir_ndx, end_ndx = send_dir_ndx;
1469                         struct file_struct *fp = file;
1470
1471                         while (1) {
1472                                 dp = F_DIRNODE_P(fp);
1473                                 end_ndx = DIR_NEXT_SIBLING(dp);
1474                                 fp = dir_flist->sorted[end_ndx];
1475                                 if (!(fp->flags & FLAG_DUPLICATE))
1476                                         break;
1477                         }
1478
1479 #ifdef ICONV_OPTION
1480                         if (ic_ndx)
1481                                 dir_ndx = F_NDX(fp);
1482                         else
1483 #endif
1484                                 dir_ndx = end_ndx;
1485                         write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
1486
1487                         while (1) {
1488                                 send1extra(f, file, flist);
1489                                 if (send_dir_ndx == end_ndx)
1490                                         break;
1491                                 dp = F_DIRNODE_P(file);
1492                                 send_dir_ndx = DIR_NEXT_SIBLING(dp);
1493                                 file = dir_flist->sorted[send_dir_ndx];
1494                         }
1495                 } else {
1496                         int dir_ndx;
1497 #ifdef ICONV_OPTION
1498                         if (ic_ndx)
1499                                 dir_ndx = F_NDX(file);
1500                         else
1501 #endif
1502                                 dir_ndx = send_dir_ndx;
1503                         write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
1504
1505                         send1extra(f, file, flist);
1506                 }
1507                 write_byte(f, 0);
1508
1509 #ifdef ICONV_OPTION
1510                 if (need_unsorted_flist) {
1511                         if (!(flist->sorted = new_array(struct file_struct *, flist->count)))
1512                                 out_of_memory("send_extra_file_list");
1513                         memcpy(flist->sorted, flist->files,
1514                                flist->count * sizeof (struct file_struct*));
1515                 } else
1516 #endif
1517                         flist->sorted = flist->files;
1518
1519                 clean_flist(flist, 0);
1520
1521                 add_dirs_to_tree(send_dir_ndx, flist, dir_count - dstart);
1522
1523                 file_total += flist->count;
1524                 future_cnt += flist->count;
1525                 stats.flist_size += stats.total_written - start_write;
1526                 stats.num_files += flist->count;
1527                 if (verbose > 3)
1528                         output_flist(flist);
1529
1530                 dp = F_DIRNODE_P(file);
1531                 if (DIR_FIRST_CHILD(dp) >= 0) {
1532                         send_dir_ndx = DIR_FIRST_CHILD(dp);
1533                         send_dir_depth++;
1534                 } else {
1535                         while (DIR_NEXT_SIBLING(dp) < 0) {
1536                                 if ((send_dir_ndx = DIR_PARENT(dp)) < 0) {
1537                                         write_ndx(f, NDX_FLIST_EOF);
1538                                         flist_eof = 1;
1539                                         change_local_filter_dir(NULL, 0, 0);
1540                                         goto finish;
1541                                 }
1542                                 send_dir_depth--;
1543                                 file = dir_flist->sorted[send_dir_ndx];
1544                                 dp = F_DIRNODE_P(file);
1545                         }
1546                         send_dir_ndx = DIR_NEXT_SIBLING(dp);
1547                 }
1548         }
1549
1550   finish:
1551         if (io_error != save_io_error && !ignore_errors)
1552                 send_msg_int(MSG_IO_ERROR, io_error);
1553 }
1554
1555 struct file_list *send_file_list(int f, int argc, char *argv[])
1556 {
1557         static const char *lastdir;
1558         static int lastdir_len = -1;
1559         int len, dirlen;
1560         STRUCT_STAT st;
1561         char *p, *dir;
1562         char lastpath[MAXPATHLEN] = "";
1563         struct file_list *flist;
1564         struct timeval start_tv, end_tv;
1565         int64 start_write;
1566         int use_ff_fd = 0;
1567         int flags, disable_buffering;
1568
1569         rprintf(FLOG, "building file list\n");
1570         if (show_filelist_p())
1571                 start_filelist_progress("building file list");
1572         else if (inc_recurse && verbose && !am_server)
1573                 rprintf(FCLIENT, "sending incremental file list\n");
1574
1575         start_write = stats.total_written;
1576         gettimeofday(&start_tv, NULL);
1577
1578 #ifdef SUPPORT_HARD_LINKS
1579         if (preserve_hard_links && protocol_version >= 30 && !cur_flist)
1580                 init_hard_links();
1581 #endif
1582
1583         flist = cur_flist = flist_new(0, "send_file_list");
1584         if (inc_recurse) {
1585                 dir_flist = flist_new(FLIST_TEMP, "send_file_list");
1586                 flags = FLAG_DIVERT_DIRS;
1587         } else {
1588                 dir_flist = cur_flist;
1589                 flags = 0;
1590         }
1591
1592         disable_buffering = io_start_buffering_out(f);
1593         if (filesfrom_fd >= 0) {
1594                 if (argv[0] && !push_dir(argv[0], 0)) {
1595                         rsyserr(FERROR, errno, "push_dir %s failed in %s",
1596                                 full_fname(argv[0]), curr_dir);
1597                         exit_cleanup(RERR_FILESELECT);
1598                 }
1599                 use_ff_fd = 1;
1600         }
1601
1602         while (1) {
1603                 char fbuf[MAXPATHLEN];
1604                 char *fn;
1605                 int is_dot_dir;
1606
1607                 if (use_ff_fd) {
1608                         if (read_filesfrom_line(filesfrom_fd, fbuf) == 0)
1609                                 break;
1610                         sanitize_path(fbuf, fbuf, "", 0, NULL);
1611                 } else {
1612                         if (argc-- == 0)
1613                                 break;
1614                         strlcpy(fbuf, *argv++, MAXPATHLEN);
1615                         if (sanitize_paths)
1616                                 sanitize_path(fbuf, fbuf, "", 0, NULL);
1617                 }
1618
1619                 len = strlen(fbuf);
1620                 if (relative_paths) {
1621                         /* We clean up fbuf below. */
1622                         is_dot_dir = 0;
1623                 } else if (!len || fbuf[len - 1] == '/') {
1624                         if (len == 2 && fbuf[0] == '.') {
1625                                 /* Turn "./" into just "." rather than "./." */
1626                                 fbuf[1] = '\0';
1627                         } else {
1628                                 if (len + 1 >= MAXPATHLEN)
1629                                         overflow_exit("send_file_list");
1630                                 fbuf[len++] = '.';
1631                                 fbuf[len] = '\0';
1632                         }
1633                         is_dot_dir = 1;
1634                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
1635                     && (len == 2 || fbuf[len-3] == '/')) {
1636                         if (len + 2 >= MAXPATHLEN)
1637                                 overflow_exit("send_file_list");
1638                         fbuf[len++] = '/';
1639                         fbuf[len++] = '.';
1640                         fbuf[len] = '\0';
1641                         is_dot_dir = 1;
1642                 } else {
1643                         is_dot_dir = fbuf[len-1] == '.'
1644                                    && (len == 1 || fbuf[len-2] == '/');
1645                 }
1646
1647                 dir = NULL;
1648
1649                 if (!relative_paths) {
1650                         p = strrchr(fbuf, '/');
1651                         if (p) {
1652                                 *p = '\0';
1653                                 if (p == fbuf)
1654                                         dir = "/";
1655                                 else
1656                                         dir = fbuf;
1657                                 len -= p - fbuf + 1;
1658                                 fn = p + 1;
1659                         } else
1660                                 fn = fbuf;
1661                 } else {
1662                         if ((p = strstr(fbuf, "/./")) != NULL) {
1663                                 *p = '\0';
1664                                 if (p == fbuf)
1665                                         dir = "/";
1666                                 else
1667                                         dir = fbuf;
1668                                 len -= p - fbuf + 3;
1669                                 fn = p + 3;
1670                         } else
1671                                 fn = fbuf;
1672                         /* Get rid of trailing "/" and "/.". */
1673                         while (len) {
1674                                 if (fn[len - 1] == '/') {
1675                                         is_dot_dir = 1;
1676                                         if (!--len && !dir) {
1677                                                 len++;
1678                                                 break;
1679                                         }
1680                                 }
1681                                 else if (len >= 2 && fn[len - 1] == '.'
1682                                                   && fn[len - 2] == '/') {
1683                                         is_dot_dir = 1;
1684                                         if (!(len -= 2) && !dir) {
1685                                                 len++;
1686                                                 break;
1687                                         }
1688                                 } else
1689                                         break;
1690                         }
1691                         if (len == 1 && fn[0] == '/')
1692                                 fn[len++] = '.';
1693                         fn[len] = '\0';
1694                         /* Reject a ".." dir in the active part of the path. */
1695                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
1696                                 if ((p[2] == '/' || p[2] == '\0')
1697                                  && (p == fn || p[-1] == '/')) {
1698                                         rprintf(FERROR,
1699                                             "found \"..\" dir in relative path: %s\n",
1700                                             fbuf);
1701                                         exit_cleanup(RERR_SYNTAX);
1702                                 }
1703                         }
1704                 }
1705
1706                 if (!*fn) {
1707                         len = 1;
1708                         fn = ".";
1709                 }
1710
1711                 dirlen = dir ? strlen(dir) : 0;
1712                 if (dirlen != lastdir_len || memcmp(lastdir, dir, dirlen) != 0) {
1713                         if (!push_pathname(dir ? strdup(dir) : NULL, dirlen))
1714                                 goto push_error;
1715                         lastdir = pathname;
1716                         lastdir_len = pathname_len;
1717                 } else if (!push_pathname(lastdir, lastdir_len)) {
1718                   push_error:
1719                         io_error |= IOERR_GENERAL;
1720                         rsyserr(FERROR, errno, "push_dir %s failed in %s",
1721                                 full_fname(dir), curr_dir);
1722                         continue;
1723                 }
1724
1725                 if (fn != fbuf)
1726                         memmove(fbuf, fn, len + 1);
1727
1728                 if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1729                         io_error |= IOERR_GENERAL;
1730                         rsyserr(FERROR, errno, "link_stat %s failed",
1731                                 full_fname(fbuf));
1732                         continue;
1733                 }
1734
1735                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
1736                         rprintf(FINFO, "skipping directory %s\n", fbuf);
1737                         continue;
1738                 }
1739
1740                 if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
1741                         /* Send the implied directories at the start of the
1742                          * source spec, so we get their permissions right. */
1743                         char *lp = lastpath, *slash = fbuf;
1744                         *p = '\0';
1745                         /* Skip any initial directories in our path that we
1746                          * have in common with lastpath. */
1747                         for (fn = fbuf; *fn && *lp == *fn; lp++, fn++) {
1748                                 if (*fn == '/')
1749                                         slash = fn;
1750                         }
1751                         *p = '/';
1752                         if (fn != p || (*lp && *lp != '/')) {
1753                                 int save_copy_links = copy_links;
1754                                 int save_xfer_dirs = xfer_dirs;
1755                                 int dir_flags = inc_recurse ? FLAG_DIVERT_DIRS : 0;
1756                                 copy_links |= copy_unsafe_links;
1757                                 xfer_dirs = 1;
1758                                 while ((slash = strchr(slash+1, '/')) != 0) {
1759                                         *slash = '\0';
1760                                         send_file_name(f, flist, fbuf, NULL,
1761                                                        dir_flags, ALL_FILTERS);
1762                                         *slash = '/';
1763                                 }
1764                                 copy_links = save_copy_links;
1765                                 xfer_dirs = save_xfer_dirs;
1766                                 *p = '\0';
1767                                 strlcpy(lastpath, fbuf, sizeof lastpath);
1768                                 *p = '/';
1769                         }
1770                 }
1771
1772                 if (one_file_system)
1773                         filesystem_dev = st.st_dev;
1774
1775                 if (recurse || (xfer_dirs && is_dot_dir)) {
1776                         struct file_struct *file;
1777                         int top_flags = FLAG_TOP_DIR | FLAG_XFER_DIR | flags;
1778                         file = send_file_name(f, flist, fbuf, &st,
1779                                               top_flags, ALL_FILTERS);
1780                         if (file && !inc_recurse)
1781                                 send_if_directory(f, flist, file, fbuf, len, flags);
1782                 } else
1783                         send_file_name(f, flist, fbuf, &st, flags, ALL_FILTERS);
1784         }
1785
1786         gettimeofday(&end_tv, NULL);
1787         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
1788                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
1789         if (stats.flist_buildtime == 0)
1790                 stats.flist_buildtime = 1;
1791         start_tv = end_tv;
1792
1793         write_byte(f, 0); /* Indicate end of file list */
1794
1795 #ifdef SUPPORT_HARD_LINKS
1796         if (preserve_hard_links && protocol_version >= 30 && !inc_recurse)
1797                 idev_destroy();
1798 #endif
1799
1800         if (show_filelist_p())
1801                 finish_filelist_progress(flist);
1802
1803         gettimeofday(&end_tv, NULL);
1804         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
1805                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
1806
1807         /* When converting names, both sides keep an unsorted file-list array
1808          * because the names will differ on the sending and receiving sides
1809          * (both sides will use the unsorted index number for each item). */
1810
1811         /* Sort the list without removing any duplicates.  This allows the
1812          * receiving side to ask for whatever name it kept.  For incremental
1813          * recursion mode, the sender marks duplicate dirs so that it can
1814          * send them together in a single file-list. */
1815 #ifdef ICONV_OPTION
1816         if (need_unsorted_flist) {
1817                 if (inc_recurse) {
1818                         if (!(flist->sorted = new_array(struct file_struct *, flist->count)))
1819                                 out_of_memory("send_file_list");
1820                         memcpy(flist->sorted, flist->files,
1821                                flist->count * sizeof (struct file_struct*));
1822                         clean_flist(flist, 0);
1823                 } else
1824                         flist->sorted = flist->files;
1825         } else
1826 #endif
1827         {
1828                 flist->sorted = flist->files;
1829                 clean_flist(flist, 0);
1830         }
1831         file_total += flist->count;
1832
1833         if (!numeric_ids && !inc_recurse)
1834                 send_id_list(f);
1835
1836         /* send the io_error flag */
1837         if (protocol_version < 30)
1838                 write_int(f, ignore_errors ? 0 : io_error);
1839         else if (io_error && !ignore_errors)
1840                 send_msg_int(MSG_IO_ERROR, io_error);
1841
1842         if (disable_buffering)
1843                 io_end_buffering_out();
1844
1845         stats.flist_size = stats.total_written - start_write;
1846         stats.num_files = flist->count;
1847
1848         if (verbose > 3)
1849                 output_flist(flist);
1850
1851         if (verbose > 2)
1852                 rprintf(FINFO, "send_file_list done\n");
1853
1854         if (inc_recurse) {
1855                 add_dirs_to_tree(-1, flist, dir_count);
1856                 if (send_dir_ndx < 0) {
1857                         write_ndx(f, NDX_FLIST_EOF);
1858                         flist_eof = 1;
1859                 }
1860                 else if (file_total == 1) {
1861                         /* If we're creating incremental file-lists and there
1862                          * was just 1 item in the first file-list, send 1 more
1863                          * file-list to check if this is a 1-file xfer. */
1864                         send_extra_file_list(f, 1);
1865                 }
1866         }
1867
1868         return flist;
1869 }
1870
1871 struct file_list *recv_file_list(int f)
1872 {
1873         struct file_list *flist;
1874         int dstart, flags;
1875         int64 start_read;
1876
1877         if (!first_flist)
1878                 rprintf(FLOG, "receiving file list\n");
1879         if (show_filelist_p())
1880                 start_filelist_progress("receiving file list");
1881         else if (inc_recurse && verbose && !am_server && !first_flist)
1882                 rprintf(FCLIENT, "receiving incremental file list\n");
1883
1884         start_read = stats.total_read;
1885
1886         flist = flist_new(0, "recv_file_list");
1887
1888 #ifdef SUPPORT_HARD_LINKS
1889         if (preserve_hard_links && protocol_version < 30)
1890                 init_hard_links();
1891 #endif
1892
1893         if (inc_recurse) {
1894                 if (flist->ndx_start == 0)
1895                         dir_flist = flist_new(FLIST_TEMP, "recv_file_list");
1896                 dstart = dir_flist->count;
1897         } else {
1898                 dir_flist = flist;
1899                 dstart = 0;
1900         }
1901
1902         while ((flags = read_byte(f)) != 0) {
1903                 struct file_struct *file;
1904
1905                 flist_expand(flist, 1);
1906
1907                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
1908                         flags |= read_byte(f) << 8;
1909                 file = recv_file_entry(flist, flags, f);
1910
1911                 if (inc_recurse && S_ISDIR(file->mode)) {
1912                         flist_expand(dir_flist, 1);
1913                         dir_flist->files[dir_flist->count++] = file;
1914                 }
1915
1916                 flist->files[flist->count++] = file;
1917
1918                 maybe_emit_filelist_progress(flist->count);
1919
1920                 if (verbose > 2) {
1921                         rprintf(FINFO, "recv_file_name(%s)\n",
1922                                 f_name(file, NULL));
1923                 }
1924         }
1925         file_total += flist->count;
1926
1927         if (verbose > 2)
1928                 rprintf(FINFO, "received %d names\n", flist->count);
1929
1930         if (show_filelist_p())
1931                 finish_filelist_progress(flist);
1932
1933 #ifdef ICONV_OPTION
1934         if (need_unsorted_flist) {
1935                 /* Create an extra array of index pointers that we can sort for
1936                  * the generator's use (for wading through the files in sorted
1937                  * order and for calling flist_find()).  We keep the "files"
1938                  * list unsorted for our exchange of index numbers with the
1939                  * other side (since their names may not sort the same). */
1940                 if (!(flist->sorted = new_array(struct file_struct *, flist->count)))
1941                         out_of_memory("recv_file_list");
1942                 memcpy(flist->sorted, flist->files,
1943                        flist->count * sizeof (struct file_struct*));
1944                 if (inc_recurse && dir_flist->count > dstart) {
1945                         dir_flist->sorted = realloc_array(dir_flist->sorted,
1946                                                 struct file_struct *,
1947                                                 dir_flist->count);
1948                         memcpy(dir_flist->sorted + dstart, dir_flist->files + dstart,
1949                                (dir_flist->count - dstart) * sizeof (struct file_struct*));
1950                         qsort(dir_flist->sorted + dstart, dir_flist->count - dstart,
1951                               sizeof (struct file_struct*), (int (*)())file_compare);
1952                 }
1953         } else
1954 #endif
1955         {
1956                 flist->sorted = flist->files;
1957                 if (inc_recurse && dir_flist->count > dstart) {
1958                         dir_flist->sorted = dir_flist->files;
1959                         qsort(dir_flist->sorted + dstart, dir_flist->count - dstart,
1960                               sizeof (struct file_struct*), (int (*)())file_compare);
1961                 }
1962         }
1963
1964         if (!inc_recurse && f >= 0)
1965                 recv_id_list(f, flist);
1966
1967         clean_flist(flist, relative_paths);
1968
1969         if (protocol_version < 30) {
1970                 /* Recv the io_error flag */
1971                 if (ignore_errors)
1972                         read_int(f);
1973                 else
1974                         io_error |= read_int(f);
1975         }
1976
1977         if (verbose > 3)
1978                 output_flist(flist);
1979
1980         if (list_only) {
1981                 int i;
1982                 for (i = 0; i < flist->count; i++)
1983                         list_file_entry(flist->files[i]);
1984         }
1985
1986         if (verbose > 2)
1987                 rprintf(FINFO, "recv_file_list done\n");
1988
1989         stats.flist_size += stats.total_read - start_read;
1990         stats.num_files += flist->count;
1991
1992         return flist;
1993 }
1994
1995 /* This is only used once by the receiver if the very first file-list
1996  * has exactly one item in it. */
1997 void recv_additional_file_list(int f)
1998 {
1999         struct file_list *flist;
2000         int ndx = read_ndx(f);
2001         if (ndx == NDX_FLIST_EOF) {
2002                 flist_eof = 1;
2003                 change_local_filter_dir(NULL, 0, 0);
2004         } else {
2005                 ndx = NDX_FLIST_OFFSET - ndx;
2006                 if (ndx < 0 || ndx >= dir_flist->count) {
2007                         ndx = NDX_FLIST_OFFSET - ndx;
2008                         rprintf(FERROR,
2009                                 "[%s] Invalid dir index: %d (%d - %d)\n",
2010                                 who_am_i(), ndx, NDX_FLIST_OFFSET,
2011                                 NDX_FLIST_OFFSET - dir_flist->count + 1);
2012                         exit_cleanup(RERR_PROTOCOL);
2013                 }
2014                 if (verbose > 3) {
2015                         rprintf(FINFO, "[%s] receiving flist for dir %d\n",
2016                                 who_am_i(), ndx);
2017                 }
2018                 flist = recv_file_list(f);
2019                 flist->parent_ndx = ndx;
2020         }
2021 }
2022
2023 /* Search for an identically-named item in the file list.  Note that the
2024  * items must agree in their directory-ness, or no match is returned. */
2025 int flist_find(struct file_list *flist, struct file_struct *f)
2026 {
2027         int low = flist->low, high = flist->high;
2028         int diff, mid, mid_up;
2029
2030         while (low <= high) {
2031                 mid = (low + high) / 2;
2032                 if (F_IS_ACTIVE(flist->sorted[mid]))
2033                         mid_up = mid;
2034                 else {
2035                         /* Scan for the next non-empty entry using the cached
2036                          * distance values.  If the value isn't fully up-to-
2037                          * date, update it. */
2038                         mid_up = mid + F_DEPTH(flist->sorted[mid]);
2039                         if (!F_IS_ACTIVE(flist->sorted[mid_up])) {
2040                                 do {
2041                                     mid_up += F_DEPTH(flist->sorted[mid_up]);
2042                                 } while (!F_IS_ACTIVE(flist->sorted[mid_up]));
2043                                 F_DEPTH(flist->sorted[mid]) = mid_up - mid;
2044                         }
2045                         if (mid_up > high) {
2046                                 /* If there's nothing left above us, set high to
2047                                  * a non-empty entry below us and continue. */
2048                                 high = mid - (int)flist->sorted[mid]->len32;
2049                                 if (!F_IS_ACTIVE(flist->sorted[high])) {
2050                                         do {
2051                                             high -= (int)flist->sorted[high]->len32;
2052                                         } while (!F_IS_ACTIVE(flist->sorted[high]));
2053                                         flist->sorted[mid]->len32 = mid - high;
2054                                 }
2055                                 continue;
2056                         }
2057                 }
2058                 diff = f_name_cmp(flist->sorted[mid_up], f);
2059                 if (diff == 0) {
2060                         if (protocol_version < 29
2061                             && S_ISDIR(flist->sorted[mid_up]->mode)
2062                             != S_ISDIR(f->mode))
2063                                 return -1;
2064                         return mid_up;
2065                 }
2066                 if (diff < 0)
2067                         low = mid_up + 1;
2068                 else
2069                         high = mid - 1;
2070         }
2071         return -1;
2072 }
2073
2074 /*
2075  * Free up any resources a file_struct has allocated
2076  * and clear the file.
2077  */
2078 void clear_file(struct file_struct *file)
2079 {
2080         /* The +1 zeros out the first char of the basename. */
2081         memset(file, 0, FILE_STRUCT_LEN + 1);
2082         /* In an empty entry, F_DEPTH() is an offset to the next non-empty
2083          * entry.  Likewise for len32 in the opposite direction.  We assume
2084          * that we're alone for now since flist_find() will adjust the counts
2085          * it runs into that aren't up-to-date. */
2086         file->len32 = F_DEPTH(file) = 1;
2087 }
2088
2089 /* Allocate a new file list. */
2090 struct file_list *flist_new(int flags, char *msg)
2091 {
2092         struct file_list *flist;
2093
2094         flist = new(struct file_list);
2095         if (!flist)
2096                 out_of_memory(msg);
2097
2098         memset(flist, 0, sizeof flist[0]);
2099
2100         if (!(flags & FLIST_TEMP)) {
2101                 if (first_flist) {
2102                         flist->ndx_start = first_flist->prev->ndx_start
2103                                          + first_flist->prev->count;
2104                 }
2105                 /* This is a doubly linked list with prev looping back to
2106                  * the end of the list, but the last next pointer is NULL. */
2107                 if (!first_flist)
2108                         first_flist = cur_flist = flist->prev = flist;
2109                 else {
2110                         flist->prev = first_flist->prev;
2111                         flist->prev->next = first_flist->prev = flist;
2112                 }
2113                 flist_cnt++;
2114         }
2115
2116         if (!(flist->file_pool = pool_create(FILE_EXTENT, 0, out_of_memory, POOL_INTERN)))
2117                 out_of_memory(msg);
2118
2119         return flist;
2120 }
2121
2122 /* Free up all elements in a flist. */
2123 void flist_free(struct file_list *flist)
2124 {
2125         if (!flist->prev)
2126                 ; /* Was FLIST_TEMP dir-list. */
2127         else if (flist == flist->prev) {
2128                 first_flist = cur_flist = NULL;
2129                 file_total = 0;
2130                 flist_cnt = 0;
2131         } else {
2132                 if (flist == cur_flist)
2133                         cur_flist = flist->next;
2134                 if (flist == first_flist)
2135                         first_flist = first_flist->next;
2136                 else {
2137                         flist->prev->next = flist->next;
2138                         if (!flist->next)
2139                                 flist->next = first_flist;
2140                 }
2141                 flist->next->prev = flist->prev;
2142                 file_total -= flist->count;
2143                 flist_cnt--;
2144         }
2145
2146         pool_destroy(flist->file_pool);
2147         if (flist->sorted && flist->sorted != flist->files)
2148                 free(flist->sorted);
2149         free(flist->files);
2150         free(flist);
2151 }
2152
2153 /* This routine ensures we don't have any duplicate names in our file list.
2154  * duplicate names can cause corruption because of the pipelining. */
2155 static void clean_flist(struct file_list *flist, int strip_root)
2156 {
2157         char fbuf[MAXPATHLEN];
2158         int i, prev_i;
2159
2160         if (!flist)
2161                 return;
2162         if (flist->count == 0) {
2163                 flist->high = -1;
2164                 return;
2165         }
2166
2167         qsort(flist->sorted, flist->count,
2168             sizeof flist->sorted[0], (int (*)())file_compare);
2169
2170         if (!am_sender || inc_recurse) {
2171                 for (i = prev_i = 0; i < flist->count; i++) {
2172                         if (F_IS_ACTIVE(flist->sorted[i])) {
2173                                 prev_i = i;
2174                                 break;
2175                         }
2176                 }
2177                 flist->low = prev_i;
2178         } else {
2179                 i = prev_i = flist->count - 1;
2180                 flist->low = 0;
2181         }
2182
2183         while (++i < flist->count) {
2184                 int j;
2185                 struct file_struct *file = flist->sorted[i];
2186
2187                 if (!F_IS_ACTIVE(file))
2188                         continue;
2189                 if (f_name_cmp(file, flist->sorted[prev_i]) == 0)
2190                         j = prev_i;
2191                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
2192                         int save_mode = file->mode;
2193                         /* Make sure that this directory doesn't duplicate a
2194                          * non-directory earlier in the list. */
2195                         flist->high = prev_i;
2196                         file->mode = S_IFREG;
2197                         j = flist_find(flist, file);
2198                         file->mode = save_mode;
2199                 } else
2200                         j = -1;
2201                 if (j >= 0) {
2202                         struct file_struct *fp = flist->sorted[j];
2203                         int keep, drop;
2204                         /* If one is a dir and the other is not, we want to
2205                          * keep the dir because it might have contents in the
2206                          * list. */
2207                         if (S_ISDIR(file->mode) != S_ISDIR(fp->mode)) {
2208                                 if (S_ISDIR(file->mode))
2209                                         keep = i, drop = j;
2210                                 else
2211                                         keep = j, drop = i;
2212                         } else if (protocol_version < 27)
2213                                 keep = j, drop = i;
2214                         else
2215                                 keep = i, drop = j;
2216
2217                         if (am_sender)
2218                                 flist->sorted[drop]->flags |= FLAG_DUPLICATE;
2219                         else {
2220                                 if (verbose > 1) {
2221                                         rprintf(FINFO,
2222                                             "removing duplicate name %s from file list (%d)\n",
2223                                             f_name(file, fbuf), drop + flist->ndx_start);
2224                                 }
2225                                 /* Make sure we don't lose track of a user-specified
2226                                  * top directory. */
2227                                 flist->sorted[keep]->flags |= flist->sorted[drop]->flags
2228                                                            & (FLAG_TOP_DIR|FLAG_XFER_DIR);
2229
2230                                 clear_file(flist->sorted[drop]);
2231                         }
2232
2233                         if (keep == i) {
2234                                 if (flist->low == drop) {
2235                                         for (j = drop + 1;
2236                                              j < i && !F_IS_ACTIVE(flist->sorted[j]);
2237                                              j++) {}
2238                                         flist->low = j;
2239                                 }
2240                                 prev_i = i;
2241                         }
2242                 } else
2243                         prev_i = i;
2244         }
2245         flist->high = prev_i;
2246
2247         if (strip_root) {
2248                 /* We need to strip off the leading slashes for relative
2249                  * paths, but this must be done _after_ the sorting phase. */
2250                 for (i = flist->low; i <= flist->high; i++) {
2251                         struct file_struct *file = flist->sorted[i];
2252
2253                         if (!file->dirname)
2254                                 continue;
2255                         while (*file->dirname == '/')
2256                                 file->dirname++;
2257                         if (!*file->dirname)
2258                                 file->dirname = NULL;
2259                 }
2260         }
2261
2262         if (prune_empty_dirs && !am_sender) {
2263                 int j, prev_depth = 0;
2264
2265                 prev_i = 0; /* It's OK that this isn't really true. */
2266
2267                 for (i = flist->low; i <= flist->high; i++) {
2268                         struct file_struct *fp, *file = flist->sorted[i];
2269
2270                         /* This temporarily abuses the F_DEPTH() value for a
2271                          * directory that is in a chain that might get pruned.
2272                          * We restore the old value if it gets a reprieve. */
2273                         if (S_ISDIR(file->mode) && F_DEPTH(file)) {
2274                                 /* Dump empty dirs when coming back down. */
2275                                 for (j = prev_depth; j >= F_DEPTH(file); j--) {
2276                                         fp = flist->sorted[prev_i];
2277                                         if (F_DEPTH(fp) >= 0)
2278                                                 break;
2279                                         prev_i = -F_DEPTH(fp)-1;
2280                                         clear_file(fp);
2281                                 }
2282                                 prev_depth = F_DEPTH(file);
2283                                 if (is_excluded(f_name(file, fbuf), 1,
2284                                                        ALL_FILTERS)) {
2285                                         /* Keep dirs through this dir. */
2286                                         for (j = prev_depth-1; ; j--) {
2287                                                 fp = flist->sorted[prev_i];
2288                                                 if (F_DEPTH(fp) >= 0)
2289                                                         break;
2290                                                 prev_i = -F_DEPTH(fp)-1;
2291                                                 F_DEPTH(fp) = j;
2292                                         }
2293                                 } else
2294                                         F_DEPTH(file) = -prev_i-1;
2295                                 prev_i = i;
2296                         } else {
2297                                 /* Keep dirs through this non-dir. */
2298                                 for (j = prev_depth; ; j--) {
2299                                         fp = flist->sorted[prev_i];
2300                                         if (F_DEPTH(fp) >= 0)
2301                                                 break;
2302                                         prev_i = -F_DEPTH(fp)-1;
2303                                         F_DEPTH(fp) = j;
2304                                 }
2305                         }
2306                 }
2307                 /* Dump all remaining empty dirs. */
2308                 while (1) {
2309                         struct file_struct *fp = flist->sorted[prev_i];
2310                         if (F_DEPTH(fp) >= 0)
2311                                 break;
2312                         prev_i = -F_DEPTH(fp)-1;
2313                         clear_file(fp);
2314                 }
2315
2316                 for (i = flist->low; i <= flist->high; i++) {
2317                         if (F_IS_ACTIVE(flist->sorted[i]))
2318                                 break;
2319                 }
2320                 flist->low = i;
2321                 for (i = flist->high; i >= flist->low; i--) {
2322                         if (F_IS_ACTIVE(flist->sorted[i]))
2323                                 break;
2324                 }
2325                 flist->high = i;
2326         }
2327 }
2328
2329 static void output_flist(struct file_list *flist)
2330 {
2331         char uidbuf[16], gidbuf[16], depthbuf[16];
2332         struct file_struct *file;
2333         const char *root, *dir, *slash, *name, *trail;
2334         const char *who = who_am_i();
2335         int i;
2336
2337         rprintf(FINFO, "[%s] flist start=%d, count=%d, low=%d, high=%d\n",
2338                 who, flist->ndx_start, flist->count, flist->low, flist->high);
2339         for (i = 0; i < flist->count; i++) {
2340                 file = flist->sorted[i];
2341                 if ((am_root || am_sender) && preserve_uid) {
2342                         snprintf(uidbuf, sizeof uidbuf, " uid=%u",
2343                                  F_OWNER(file));
2344                 } else
2345                         *uidbuf = '\0';
2346                 if (preserve_gid) {
2347                         static char parens[] = "(\0)\0\0\0";
2348                         char *pp = parens + (file->flags & FLAG_SKIP_GROUP ? 0 : 3);
2349                         snprintf(gidbuf, sizeof gidbuf, " gid=%s%u%s",
2350                                  pp, F_GROUP(file), pp + 2);
2351                 } else
2352                         *gidbuf = '\0';
2353                 if (!am_sender)
2354                         snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file));
2355                 if (F_IS_ACTIVE(file)) {
2356                         root = am_sender ? NS(F_PATHNAME(file)) : depthbuf;
2357                         if ((dir = file->dirname) == NULL)
2358                                 dir = slash = "";
2359                         else
2360                                 slash = "/";
2361                         name = file->basename;
2362                         trail = S_ISDIR(file->mode) ? "/" : "";
2363                 } else
2364                         root = dir = slash = name = trail = "";
2365                 rprintf(FINFO,
2366                         "[%s] i=%d %s %s%s%s%s mode=0%o len=%.0f%s%s flags=%x\n",
2367                         who, i + flist->ndx_start,
2368                         root, dir, slash, name, trail,
2369                         (int)file->mode, (double)F_LENGTH(file),
2370                         uidbuf, gidbuf, file->flags);
2371         }
2372 }
2373
2374 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
2375 enum fnc_type { t_PATH, t_ITEM };
2376
2377 /* Compare the names of two file_struct entities, similar to how strcmp()
2378  * would do if it were operating on the joined strings.
2379  *
2380  * Some differences beginning with protocol_version 29: (1) directory names
2381  * are compared with an assumed trailing slash so that they compare in a
2382  * way that would cause them to sort immediately prior to any content they
2383  * may have; (2) a directory of any name compares after a non-directory of
2384  * any name at the same depth; (3) a directory with name "." compares prior
2385  * to anything else.  These changes mean that a directory and a non-dir
2386  * with the same name will not compare as equal (protocol_version >= 29).
2387  *
2388  * The dirname component can be an empty string, but the basename component
2389  * cannot (and never is in the current codebase).  The basename component
2390  * may be NULL (for a removed item), in which case it is considered to be
2391  * after any existing item. */
2392 int f_name_cmp(struct file_struct *f1, struct file_struct *f2)
2393 {
2394         int dif;
2395         const uchar *c1, *c2;
2396         enum fnc_state state1, state2;
2397         enum fnc_type type1, type2;
2398         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
2399
2400         if (!f1 || !F_IS_ACTIVE(f1)) {
2401                 if (!f2 || !F_IS_ACTIVE(f2))
2402                         return 0;
2403                 return -1;
2404         }
2405         if (!f2 || !F_IS_ACTIVE(f2))
2406                 return 1;
2407
2408         c1 = (uchar*)f1->dirname;
2409         c2 = (uchar*)f2->dirname;
2410         if (c1 == c2)
2411                 c1 = c2 = NULL;
2412         if (!c1) {
2413                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2414                 c1 = (const uchar*)f1->basename;
2415                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2416                         type1 = t_ITEM;
2417                         state1 = s_TRAILING;
2418                         c1 = (uchar*)"";
2419                 } else
2420                         state1 = s_BASE;
2421         } else {
2422                 type1 = t_path;
2423                 state1 = s_DIR;
2424         }
2425         if (!c2) {
2426                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2427                 c2 = (const uchar*)f2->basename;
2428                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2429                         type2 = t_ITEM;
2430                         state2 = s_TRAILING;
2431                         c2 = (uchar*)"";
2432                 } else
2433                         state2 = s_BASE;
2434         } else {
2435                 type2 = t_path;
2436                 state2 = s_DIR;
2437         }
2438
2439         if (type1 != type2)
2440                 return type1 == t_PATH ? 1 : -1;
2441
2442         do {
2443                 if (!*c1) {
2444                         switch (state1) {
2445                         case s_DIR:
2446                                 state1 = s_SLASH;
2447                                 c1 = (uchar*)"/";
2448                                 break;
2449                         case s_SLASH:
2450                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2451                                 c1 = (const uchar*)f1->basename;
2452                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2453                                         type1 = t_ITEM;
2454                                         state1 = s_TRAILING;
2455                                         c1 = (uchar*)"";
2456                                 } else
2457                                         state1 = s_BASE;
2458                                 break;
2459                         case s_BASE:
2460                                 state1 = s_TRAILING;
2461                                 if (type1 == t_PATH) {
2462                                         c1 = (uchar*)"/";
2463                                         break;
2464                                 }
2465                                 /* FALL THROUGH */
2466                         case s_TRAILING:
2467                                 type1 = t_ITEM;
2468                                 break;
2469                         }
2470                         if (*c2 && type1 != type2)
2471                                 return type1 == t_PATH ? 1 : -1;
2472                 }
2473                 if (!*c2) {
2474                         switch (state2) {
2475                         case s_DIR:
2476                                 state2 = s_SLASH;
2477                                 c2 = (uchar*)"/";
2478                                 break;
2479                         case s_SLASH:
2480                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2481                                 c2 = (const uchar*)f2->basename;
2482                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2483                                         type2 = t_ITEM;
2484                                         state2 = s_TRAILING;
2485                                         c2 = (uchar*)"";
2486                                 } else
2487                                         state2 = s_BASE;
2488                                 break;
2489                         case s_BASE:
2490                                 state2 = s_TRAILING;
2491                                 if (type2 == t_PATH) {
2492                                         c2 = (uchar*)"/";
2493                                         break;
2494                                 }
2495                                 /* FALL THROUGH */
2496                         case s_TRAILING:
2497                                 if (!*c1)
2498                                         return 0;
2499                                 type2 = t_ITEM;
2500                                 break;
2501                         }
2502                         if (type1 != type2)
2503                                 return type1 == t_PATH ? 1 : -1;
2504                 }
2505         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
2506
2507         return dif;
2508 }
2509
2510 char *f_name_buf(void)
2511 {
2512         static char names[5][MAXPATHLEN];
2513         static unsigned int n;
2514
2515         n = (n + 1) % (sizeof names / sizeof names[0]);
2516
2517         return names[n];
2518 }
2519
2520 /* Return a copy of the full filename of a flist entry, using the indicated
2521  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
2522  * done because we checked the size when creating the file_struct entry.
2523  */
2524 char *f_name(struct file_struct *f, char *fbuf)
2525 {
2526         if (!f || !F_IS_ACTIVE(f))
2527                 return NULL;
2528
2529         if (!fbuf)
2530                 fbuf = f_name_buf();
2531
2532         if (f->dirname) {
2533                 int len = strlen(f->dirname);
2534                 memcpy(fbuf, f->dirname, len);
2535                 fbuf[len] = '/';
2536                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
2537         } else
2538                 strlcpy(fbuf, f->basename, MAXPATHLEN);
2539
2540         return fbuf;
2541 }
2542
2543 /* Do a non-recursive scan of the named directory, possibly ignoring all
2544  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
2545  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
2546  * buffer (the functions we call will append names onto the end, but the old
2547  * dir value will be restored on exit). */
2548 struct file_list *get_dirlist(char *dirname, int dlen, int ignore_filter_rules)
2549 {
2550         struct file_list *dirlist;
2551         char dirbuf[MAXPATHLEN];
2552         int save_recurse = recurse;
2553         int save_xfer_dirs = xfer_dirs;
2554
2555         if (dlen < 0) {
2556                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
2557                 if (dlen >= MAXPATHLEN)
2558                         return NULL;
2559                 dirname = dirbuf;
2560         }
2561
2562         dirlist = flist_new(FLIST_TEMP, "get_dirlist");
2563
2564         recurse = 0;
2565         xfer_dirs = 1;
2566         send_directory(ignore_filter_rules ? -2 : -1, dirlist, dirname, dlen, 0);
2567         xfer_dirs = save_xfer_dirs;
2568         recurse = save_recurse;
2569         if (do_progress)
2570                 flist_count_offset += dirlist->count;
2571
2572         dirlist->sorted = dirlist->files;
2573         clean_flist(dirlist, 0);
2574
2575         if (verbose > 3)
2576                 output_flist(dirlist);
2577
2578         return dirlist;
2579 }