flist.c

   1 /*
   2  * Generate and receive file lists.
   3  *
   4  * Copyright (C) 1996 Andrew Tridgell
   5  * Copyright (C) 1996 Paul Mackerras
   6  * Copyright (C) 2001, 2002 Martin Pool <mbp@samba.org>
   7  * Copyright (C) 2002-2007 Wayne Davison
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 3 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, visit the http://fsf.org website.
  21  */
  22
  23 #include "rsync.h"
  24 #include "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 use_qsort;
  42 extern int xfer_dirs;
  43 extern int filesfrom_fd;
  44 extern int one_file_system;
  45 extern int copy_dirlinks;
  46 extern int keep_dirlinks;
  47 extern int preserve_acls;
  48 extern int preserve_xattrs;
  49 extern int preserve_links;
  50 extern int preserve_hard_links;
  51 extern int preserve_devices;
  52 extern int preserve_specials;
  53 extern int uid_ndx;
  54 extern int gid_ndx;
  55 extern int relative_paths;
  56 extern int implied_dirs;
  57 extern int file_extra_cnt;
  58 extern int ignore_perishable;
  59 extern int non_perishable_cnt;
  60 extern int prune_empty_dirs;
  61 extern int copy_links;
  62 extern int copy_unsafe_links;
  63 extern int protocol_version;
  64 extern int sanitize_paths;
  65 extern struct stats stats;
  66
  67 extern char curr_dir[MAXPATHLEN];
  68
  69 extern struct chmod_mode_struct *chmod_modes;
  70
  71 extern struct filter_list_struct filter_list;
  72 extern struct filter_list_struct server_filter_list;
  73
  74 #ifdef ICONV_OPTION
  75 extern int ic_ndx;
  76 extern int need_unsorted_flist;
  77 extern iconv_t ic_send, ic_recv;
  78 #endif
  79
  80 #define PTR_SIZE (sizeof (struct file_struct *))
  81
  82 int io_error;
  83 int checksum_len;
  84 dev_t filesystem_dev; /* used to implement -x */
  85
  86 struct file_list *cur_flist, *first_flist, *dir_flist;
  87 int send_dir_ndx = -1, send_dir_depth = 0;
  88 int flist_cnt = 0; /* how many (non-tmp) file list objects exist */
  89 int file_total = 0; /* total of all active items over all file-lists */
  90 int flist_eof = 0; /* all the file-lists are now known */
  91
  92 /* The tmp_* vars are used as a cache area by make_file() to store data
  93  * that the sender doesn't need to remember in its file list.  The data
  94  * will survive just long enough to be used by send_file_entry(). */
  95 static dev_t tmp_rdev;
  96 #ifdef SUPPORT_HARD_LINKS
  97 static int64 tmp_dev, tmp_ino;
  98 #endif
  99 static char tmp_sum[MAX_DIGEST_LEN];
 100
 101 static char empty_sum[MAX_DIGEST_LEN];
 102 static int flist_count_offset; /* for --delete --progress */
 103 static int dir_count = 0;
 104
 105 static void clean_flist(struct file_list *flist, int strip_root);
 106 static void output_flist(struct file_list *flist);
 107
 108 void init_flist(void)
 109 {
 110         if (verbose > 4) {
 111                 rprintf(FINFO, "FILE_STRUCT_LEN=%d, EXTRA_LEN=%d\n",
 112                         (int)FILE_STRUCT_LEN, (int)EXTRA_LEN);
 113         }
 114         checksum_len = protocol_version < 21 ? 2
 115                      : protocol_version < 30 ? MD4_DIGEST_LEN
 116                      : MD5_DIGEST_LEN;
 117 }
 118
 119 static int show_filelist_p(void)
 120 {
 121         return verbose && xfer_dirs && !am_server && !inc_recurse;
 122 }
 123
 124 static void start_filelist_progress(char *kind)
 125 {
 126         rprintf(FCLIENT, "%s ... ", kind);
 127         if (verbose > 1 || do_progress)
 128                 rprintf(FCLIENT, "\n");
 129         rflush(FINFO);
 130 }
 131
 132 static void emit_filelist_progress(int count)
 133 {
 134         rprintf(FCLIENT, " %d files...\r", count);
 135 }
 136
 137 static void maybe_emit_filelist_progress(int count)
 138 {
 139         if (do_progress && show_filelist_p() && (count % 100) == 0)
 140                 emit_filelist_progress(count);
 141 }
 142
 143 static void finish_filelist_progress(const struct file_list *flist)
 144 {
 145         if (do_progress) {
 146                 /* This overwrites the progress line */
 147                 rprintf(FINFO, "%d file%sto consider\n",
 148                         flist->used, flist->used == 1 ? " " : "s ");
 149         } else
 150                 rprintf(FINFO, "done\n");
 151 }
 152
 153 void show_flist_stats(void)
 154 {
 155         /* Nothing yet */
 156 }
 157
 158 static void list_file_entry(struct file_struct *f)
 159 {
 160         char permbuf[PERMSTRING_SIZE];
 161         double len;
 162
 163         if (!F_IS_ACTIVE(f)) {
 164                 /* this can happen if duplicate names were removed */
 165                 return;
 166         }
 167
 168         permstring(permbuf, f->mode);
 169         len = F_LENGTH(f);
 170
 171         /* TODO: indicate '+' if the entry has an ACL. */
 172
 173 #ifdef SUPPORT_LINKS
 174         if (preserve_links && S_ISLNK(f->mode)) {
 175                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
 176                         permbuf, len, timestring(f->modtime),
 177                         f_name(f, NULL), F_SYMLINK(f));
 178         } else
 179 #endif
 180         {
 181                 rprintf(FINFO, "%s %11.0f %s %s\n",
 182                         permbuf, len, timestring(f->modtime),
 183                         f_name(f, NULL));
 184         }
 185 }
 186
 187 /* Stat either a symlink or its referent, depending on the settings of
 188  * copy_links, copy_unsafe_links, etc.  Returns -1 on error, 0 on success.
 189  *
 190  * If path is the name of a symlink, then the linkbuf buffer (which must hold
 191  * MAXPATHLEN chars) will be set to the symlink's target string.
 192  *
 193  * The stat structure pointed to by stp will contain information about the
 194  * link or the referent as appropriate, if they exist. */
 195 static int readlink_stat(const char *path, STRUCT_STAT *stp, char *linkbuf)
 196 {
 197 #ifdef SUPPORT_LINKS
 198         if (link_stat(path, stp, copy_dirlinks) < 0)
 199                 return -1;
 200         if (S_ISLNK(stp->st_mode)) {
 201                 int llen = readlink(path, linkbuf, MAXPATHLEN - 1);
 202                 if (llen < 0)
 203                         return -1;
 204                 linkbuf[llen] = '\0';
 205                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 206                         if (verbose > 1) {
 207                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 208                                         path, linkbuf);
 209                         }
 210                         return x_stat(path, stp, NULL);
 211                 }
 212         }
 213         return 0;
 214 #else
 215         return x_stat(path, stp, NULL);
 216 #endif
 217 }
 218
 219 int link_stat(const char *path, STRUCT_STAT *stp, int follow_dirlinks)
 220 {
 221 #ifdef SUPPORT_LINKS
 222         if (copy_links)
 223                 return x_stat(path, stp, NULL);
 224         if (x_lstat(path, stp, NULL) < 0)
 225                 return -1;
 226         if (follow_dirlinks && S_ISLNK(stp->st_mode)) {
 227                 STRUCT_STAT st;
 228                 if (x_stat(path, &st, NULL) == 0 && S_ISDIR(st.st_mode))
 229                         *stp = st;
 230         }
 231         return 0;
 232 #else
 233         return x_stat(path, stp, NULL);
 234 #endif
 235 }
 236
 237 /* This function is used to check if a file should be included/excluded
 238  * from the list of files based on its name and type etc.  The value of
 239  * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
 240 static int is_excluded(char *fname, int is_dir, int filter_level)
 241 {
 242 #if 0 /* This currently never happens, so avoid a useless compare. */
 243         if (filter_level == NO_FILTERS)
 244                 return 0;
 245 #endif
 246         if (fname) {
 247                 /* never exclude '.', even if somebody does --exclude '*' */
 248                 if (fname[0] == '.' && !fname[1])
 249                         return 0;
 250                 /* Handle the -R version of the '.' dir. */
 251                 if (fname[0] == '/') {
 252                         int len = strlen(fname);
 253                         if (fname[len-1] == '.' && fname[len-2] == '/')
 254                                 return 0;
 255                 }
 256         }
 257         if (server_filter_list.head
 258             && check_filter(&server_filter_list, fname, is_dir) < 0)
 259                 return 1;
 260         if (filter_level != ALL_FILTERS)
 261                 return 0;
 262         if (filter_list.head
 263             && check_filter(&filter_list, fname, is_dir) < 0)
 264                 return 1;
 265         return 0;
 266 }
 267
 268 static void send_directory(int f, struct file_list *flist,
 269                            char *fbuf, int len, int flags);
 270
 271 static const char *pathname, *orig_dir;
 272 static int pathname_len;
 273
 274
 275 /* Make sure flist can hold at least flist->used + extra entries. */
 276 static void flist_expand(struct file_list *flist, int extra)
 277 {
 278         struct file_struct **new_ptr;
 279
 280         if (flist->used + extra <= flist->malloced)
 281                 return;
 282
 283         if (flist->malloced < FLIST_START)
 284                 flist->malloced = FLIST_START;
 285         else if (flist->malloced >= FLIST_LINEAR)
 286                 flist->malloced += FLIST_LINEAR;
 287         else
 288                 flist->malloced *= 2;
 289
 290         /* In case count jumped or we are starting the list
 291          * with a known size just set it. */
 292         if (flist->malloced < flist->used + extra)
 293                 flist->malloced = flist->used + extra;
 294
 295         new_ptr = realloc_array(flist->files, struct file_struct *,
 296                                 flist->malloced);
 297
 298         if (verbose >= 2 && flist->malloced != FLIST_START) {
 299                 rprintf(FCLIENT, "[%s] expand file_list pointer array to %.0f bytes, did%s move\n",
 300                     who_am_i(),
 301                     (double)sizeof flist->files[0] * flist->malloced,
 302                     (new_ptr == flist->files) ? " not" : "");
 303         }
 304
 305         flist->files = new_ptr;
 306
 307         if (!flist->files)
 308                 out_of_memory("flist_expand");
 309 }
 310
 311 static void flist_done_allocating(struct file_list *flist)
 312 {
 313         void *ptr = pool_boundary(flist->file_pool, 8*1024);
 314         if (flist->pool_boundary == ptr)
 315                 flist->pool_boundary = NULL; /* list didn't use any pool memory */
 316         else
 317                 flist->pool_boundary = ptr;
 318 }
 319
 320 int push_pathname(const char *dir, int len)
 321 {
 322         if (dir == pathname)
 323                 return 1;
 324
 325         if (!orig_dir)
 326                 orig_dir = strdup(curr_dir);
 327
 328         if (pathname && !pop_dir(orig_dir)) {
 329                 rsyserr(FERROR, errno, "pop_dir %s failed",
 330                         full_fname(orig_dir));
 331                 exit_cleanup(RERR_FILESELECT);
 332         }
 333
 334         if (dir && !push_dir(dir, 0)) {
 335                 io_error |= IOERR_GENERAL;
 336                 rsyserr(FERROR, errno, "push_dir %s failed in %s",
 337                         full_fname(dir), curr_dir);
 338                 return 0;
 339         }
 340
 341         pathname = dir;
 342         pathname_len = len >= 0 ? len : dir ? (int)strlen(dir) : 0;
 343
 344         return 1;
 345 }
 346
 347 static void send_file_entry(int f, struct file_struct *file, int ndx)
 348 {
 349         static time_t modtime;
 350         static mode_t mode;
 351         static int64 dev;
 352         static dev_t rdev;
 353         static uint32 rdev_major;
 354         static uid_t uid;
 355         static gid_t gid;
 356         static char *user_name, *group_name;
 357         static char lastname[MAXPATHLEN];
 358         char fname[MAXPATHLEN];
 359         int first_hlink_ndx = -1;
 360         int l1, l2;
 361         int xflags;
 362
 363 #ifdef ICONV_OPTION
 364         if (ic_send != (iconv_t)-1) {
 365                 ICONV_CONST char *ibuf;
 366                 char *obuf = fname;
 367                 size_t ocnt = MAXPATHLEN, icnt;
 368
 369                 iconv(ic_send, NULL,0, NULL,0);
 370                 if ((ibuf = (ICONV_CONST char *)file->dirname) != NULL) {
 371                     icnt = strlen(ibuf);
 372                     ocnt--; /* pre-subtract the space for the '/' */
 373                     if (iconv(ic_send, &ibuf,&icnt, &obuf,&ocnt) == (size_t)-1)
 374                         goto convert_error;
 375                     *obuf++ = '/';
 376                 }
 377
 378                 ibuf = (ICONV_CONST char *)file->basename;
 379                 icnt = strlen(ibuf);
 380                 if (iconv(ic_send, &ibuf,&icnt, &obuf,&ocnt) == (size_t)-1) {
 381                   convert_error:
 382                         io_error |= IOERR_GENERAL;
 383                         rprintf(FINFO,
 384                             "[%s] cannot convert filename: %s (%s)\n",
 385                             who_am_i(), f_name(file, fname), strerror(errno));
 386                         return;
 387                 }
 388                 *obuf = '\0';
 389         } else
 390 #endif
 391                 f_name(file, fname);
 392
 393         xflags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */
 394
 395         if (file->mode == mode)
 396                 xflags |= XMIT_SAME_MODE;
 397         else
 398                 mode = file->mode;
 399
 400         if (protocol_version >= 30 && S_ISDIR(mode) && !(file->flags & FLAG_XFER_DIR))
 401                 xflags |= XMIT_NON_XFER_DIR;
 402
 403         if ((preserve_devices && IS_DEVICE(mode))
 404          || (preserve_specials && IS_SPECIAL(mode))) {
 405                 if (protocol_version < 28) {
 406                         if (tmp_rdev == rdev)
 407                                 xflags |= XMIT_SAME_RDEV_pre28;
 408                         else
 409                                 rdev = tmp_rdev;
 410                 } else {
 411                         rdev = tmp_rdev;
 412                         if ((uint32)major(rdev) == rdev_major)
 413                                 xflags |= XMIT_SAME_RDEV_MAJOR;
 414                         else
 415                                 rdev_major = major(rdev);
 416                         if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu)
 417                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
 418                 }
 419         } else if (protocol_version < 28)
 420                 rdev = MAKEDEV(0, 0);
 421         if (uid_ndx) {
 422                 if ((uid_t)F_OWNER(file) == uid && *lastname)
 423                         xflags |= XMIT_SAME_UID;
 424                 else {
 425                         uid = F_OWNER(file);
 426                         if (uid_ndx && !numeric_ids) {
 427                                 user_name = add_uid(uid);
 428                                 if (inc_recurse && user_name)
 429                                         xflags |= XMIT_USER_NAME_FOLLOWS;
 430                         }
 431                 }
 432         }
 433         if (gid_ndx) {
 434                 if ((gid_t)F_GROUP(file) == gid && *lastname)
 435                         xflags |= XMIT_SAME_GID;
 436                 else {
 437                         gid = F_GROUP(file);
 438                         if (gid_ndx && !numeric_ids) {
 439                                 group_name = add_gid(gid);
 440                                 if (inc_recurse && group_name)
 441                                         xflags |= XMIT_GROUP_NAME_FOLLOWS;
 442                         }
 443                 }
 444         }
 445         if (file->modtime == modtime)
 446                 xflags |= XMIT_SAME_TIME;
 447         else
 448                 modtime = file->modtime;
 449
 450 #ifdef SUPPORT_HARD_LINKS
 451         if (tmp_dev != 0) {
 452                 if (protocol_version >= 30) {
 453                         struct idev_node *np = idev_node(tmp_dev, tmp_ino);
 454                         first_hlink_ndx = (int32)(long)np->data - 1;
 455                         if (first_hlink_ndx < 0) {
 456                                 np->data = (void*)(long)(ndx + 1);
 457                                 xflags |= XMIT_HLINK_FIRST;
 458                         }
 459                         xflags |= XMIT_HLINKED;
 460                 } else {
 461                         if (tmp_dev == dev) {
 462                                 if (protocol_version >= 28)
 463                                         xflags |= XMIT_SAME_DEV_pre30;
 464                         } else
 465                                 dev = tmp_dev;
 466                         xflags |= XMIT_HLINKED;
 467                 }
 468         }
 469 #endif
 470
 471         for (l1 = 0;
 472             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 473             l1++) {}
 474         l2 = strlen(fname+l1);
 475
 476         if (l1 > 0)
 477                 xflags |= XMIT_SAME_NAME;
 478         if (l2 > 255)
 479                 xflags |= XMIT_LONG_NAME;
 480
 481         /* We must make sure we don't send a zero flag byte or the
 482          * other end will terminate the flist transfer.  Note that
 483          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 484          * it's harmless way to add a bit to the first flag byte. */
 485         if (protocol_version >= 28) {
 486                 if (!xflags && !S_ISDIR(mode))
 487                         xflags |= XMIT_TOP_DIR;
 488                 if ((xflags & 0xFF00) || !xflags) {
 489                         xflags |= XMIT_EXTENDED_FLAGS;
 490                         write_shortint(f, xflags);
 491                 } else
 492                         write_byte(f, xflags);
 493         } else {
 494                 if (!(xflags & 0xFF))
 495                         xflags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
 496                 write_byte(f, xflags);
 497         }
 498         if (xflags & XMIT_SAME_NAME)
 499                 write_byte(f, l1);
 500         if (xflags & XMIT_LONG_NAME)
 501                 write_varint30(f, l2);
 502         else
 503                 write_byte(f, l2);
 504         write_buf(f, fname + l1, l2);
 505
 506         if (first_hlink_ndx >= 0) {
 507                 write_varint30(f, first_hlink_ndx);
 508                 goto the_end;
 509         }
 510
 511         write_varlong30(f, F_LENGTH(file), 3);
 512         if (!(xflags & XMIT_SAME_TIME)) {
 513                 if (protocol_version >= 30)
 514                         write_varlong(f, modtime, 4);
 515                 else
 516                         write_int(f, modtime);
 517         }
 518         if (!(xflags & XMIT_SAME_MODE))
 519                 write_int(f, to_wire_mode(mode));
 520         if (uid_ndx && !(xflags & XMIT_SAME_UID)) {
 521                 if (protocol_version < 30)
 522                         write_int(f, uid);
 523                 else {
 524                         write_varint(f, uid);
 525                         if (xflags & XMIT_USER_NAME_FOLLOWS) {
 526                                 int len = strlen(user_name);
 527                                 write_byte(f, len);
 528                                 write_buf(f, user_name, len);
 529                         }
 530                 }
 531         }
 532         if (gid_ndx && !(xflags & XMIT_SAME_GID)) {
 533                 if (protocol_version < 30)
 534                         write_int(f, gid);
 535                 else {
 536                         write_varint(f, gid);
 537                         if (xflags & XMIT_GROUP_NAME_FOLLOWS) {
 538                                 int len = strlen(group_name);
 539                                 write_byte(f, len);
 540                                 write_buf(f, group_name, len);
 541                         }
 542                 }
 543         }
 544         if ((preserve_devices && IS_DEVICE(mode))
 545          || (preserve_specials && IS_SPECIAL(mode))) {
 546                 if (protocol_version < 28) {
 547                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 548                                 write_int(f, (int)rdev);
 549                 } else {
 550                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 551                                 write_varint30(f, major(rdev));
 552                         if (protocol_version >= 30)
 553                                 write_varint(f, minor(rdev));
 554                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 555                                 write_byte(f, minor(rdev));
 556                         else
 557                                 write_int(f, minor(rdev));
 558                 }
 559         }
 560
 561 #ifdef SUPPORT_LINKS
 562         if (preserve_links && S_ISLNK(mode)) {
 563                 const char *sl = F_SYMLINK(file);
 564                 int len = strlen(sl);
 565                 write_varint30(f, len);
 566                 write_buf(f, sl, len);
 567         }
 568 #endif
 569
 570 #ifdef SUPPORT_HARD_LINKS
 571         if (tmp_dev != 0 && protocol_version < 30) {
 572                 if (protocol_version < 26) {
 573                         /* 32-bit dev_t and ino_t */
 574                         write_int(f, (int32)dev);
 575                         write_int(f, (int32)tmp_ino);
 576                 } else {
 577                         /* 64-bit dev_t and ino_t */
 578                         if (!(xflags & XMIT_SAME_DEV_pre30))
 579                                 write_longint(f, dev);
 580                         write_longint(f, tmp_ino);
 581                 }
 582         }
 583 #endif
 584
 585         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 586                 const char *sum;
 587                 if (S_ISREG(mode))
 588                         sum = tmp_sum;
 589                 else {
 590                         /* Prior to 28, we sent a useless set of nulls. */
 591                         sum = empty_sum;
 592                 }
 593                 write_buf(f, sum, checksum_len);
 594         }
 595
 596   the_end:
 597         strlcpy(lastname, fname, MAXPATHLEN);
 598
 599         if (S_ISREG(mode) || S_ISLNK(mode))
 600                 stats.total_size += F_LENGTH(file);
 601 }
 602
 603 static struct file_struct *recv_file_entry(struct file_list *flist,
 604                                            int xflags, int f)
 605 {
 606         static int64 modtime;
 607         static mode_t mode;
 608         static int64 dev;
 609         static dev_t rdev;
 610         static uint32 rdev_major;
 611         static uid_t uid;
 612         static gid_t gid;
 613         static uint16 gid_flags;
 614         static char lastname[MAXPATHLEN], *lastdir;
 615         static int lastdir_depth, lastdir_len = -1;
 616         static unsigned int del_hier_name_len = 0;
 617         static int in_del_hier = 0;
 618         char thisname[MAXPATHLEN];
 619         unsigned int l1 = 0, l2 = 0;
 620         int alloc_len, basename_len, linkname_len;
 621         int extra_len = file_extra_cnt * EXTRA_LEN;
 622         int first_hlink_ndx = -1;
 623         OFF_T file_length;
 624         const char *basename;
 625         struct file_struct *file;
 626         alloc_pool_t *pool;
 627         char *bp;
 628
 629         if (xflags & XMIT_SAME_NAME)
 630                 l1 = read_byte(f);
 631
 632         if (xflags & XMIT_LONG_NAME)
 633                 l2 = read_varint30(f);
 634         else
 635                 l2 = read_byte(f);
 636
 637         if (l2 >= MAXPATHLEN - l1) {
 638                 rprintf(FERROR,
 639                         "overflow: xflags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
 640                         xflags, l1, l2, lastname, who_am_i());
 641                 overflow_exit("recv_file_entry");
 642         }
 643
 644         strlcpy(thisname, lastname, l1 + 1);
 645         read_sbuf(f, &thisname[l1], l2);
 646         thisname[l1 + l2] = 0;
 647
 648         /* Abuse basename_len for a moment... */
 649         basename_len = strlcpy(lastname, thisname, MAXPATHLEN);
 650
 651 #ifdef ICONV_OPTION
 652         if (ic_recv != (iconv_t)-1) {
 653                 char *obuf = thisname;
 654                 ICONV_CONST char *ibuf = (ICONV_CONST char *)lastname;
 655                 size_t ocnt = MAXPATHLEN, icnt = basename_len;
 656
 657                 if (icnt >= MAXPATHLEN) {
 658                         errno = E2BIG;
 659                         goto convert_error;
 660                 }
 661
 662                 iconv(ic_recv, NULL,0, NULL,0);
 663                 if (iconv(ic_recv, &ibuf,&icnt, &obuf,&ocnt) == (size_t)-1) {
 664                   convert_error:
 665                         io_error |= IOERR_GENERAL;
 666                         rprintf(FINFO,
 667                             "[%s] cannot convert filename: %s (%s)\n",
 668                             who_am_i(), lastname, strerror(errno));
 669                         obuf = thisname;
 670                 }
 671                 *obuf = '\0';
 672         }
 673 #endif
 674
 675         clean_fname(thisname, 0);
 676
 677         if (sanitize_paths)
 678                 sanitize_path(thisname, thisname, "", 0, NULL);
 679
 680         if ((basename = strrchr(thisname, '/')) != NULL) {
 681                 int len = basename++ - thisname;
 682                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
 683                         lastdir = new_array(char, len + 1);
 684                         memcpy(lastdir, thisname, len);
 685                         lastdir[len] = '\0';
 686                         lastdir_len = len;
 687                         lastdir_depth = count_dir_elements(lastdir);
 688                 }
 689         } else
 690                 basename = thisname;
 691         basename_len = strlen(basename) + 1; /* count the '\0' */
 692
 693 #ifdef SUPPORT_HARD_LINKS
 694         if (protocol_version >= 30
 695          && BITS_SETnUNSET(xflags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
 696                 struct file_struct *first;
 697                 first_hlink_ndx = read_varint30(f);
 698                 if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->used) {
 699                         rprintf(FERROR,
 700                                 "hard-link reference out of range: %d (%d)\n",
 701                                 first_hlink_ndx, flist->used);
 702                         exit_cleanup(RERR_PROTOCOL);
 703                 }
 704                 first = flist->files[first_hlink_ndx];
 705                 file_length = F_LENGTH(first);
 706                 modtime = first->modtime;
 707                 mode = first->mode;
 708                 if (uid_ndx)
 709                         uid = F_OWNER(first);
 710                 if (gid_ndx)
 711                         gid = F_GROUP(first);
 712                 if ((preserve_devices && IS_DEVICE(mode))
 713                  || (preserve_specials && IS_SPECIAL(mode))) {
 714                         uint32 *devp = F_RDEV_P(first);
 715                         rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
 716                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 717                 }
 718                 if (preserve_links && S_ISLNK(mode))
 719                         linkname_len = strlen(F_SYMLINK(first)) + 1;
 720                 else
 721                         linkname_len = 0;
 722                 goto create_object;
 723         }
 724 #endif
 725
 726         file_length = read_varlong30(f, 3);
 727         if (!(xflags & XMIT_SAME_TIME)) {
 728                 if (protocol_version >= 30) {
 729                         modtime = read_varlong(f, 4);
 730 #if SIZEOF_TIME_T < SIZEOF_INT64
 731                         if ((modtime > INT_MAX || modtime < INT_MIN) && !am_generator) {
 732                                 rprintf(FERROR,
 733                                     "Time value of %s truncated on receiver.\n",
 734                                     lastname);
 735                         }
 736 #endif
 737                 } else
 738                         modtime = read_int(f);
 739         }
 740         if (!(xflags & XMIT_SAME_MODE))
 741                 mode = from_wire_mode(read_int(f));
 742
 743         if (chmod_modes && !S_ISLNK(mode))
 744                 mode = tweak_mode(mode, chmod_modes);
 745
 746         if (uid_ndx && !(xflags & XMIT_SAME_UID)) {
 747                 if (protocol_version < 30)
 748                         uid = (uid_t)read_int(f);
 749                 else {
 750                         uid = (uid_t)read_varint(f);
 751                         if (xflags & XMIT_USER_NAME_FOLLOWS)
 752                                 uid = recv_user_name(f, uid);
 753                         else if (inc_recurse && am_root && !numeric_ids)
 754                                 uid = match_uid(uid);
 755                 }
 756         }
 757         if (gid_ndx && !(xflags & XMIT_SAME_GID)) {
 758                 if (protocol_version < 30)
 759                         gid = (gid_t)read_int(f);
 760                 else {
 761                         gid = (gid_t)read_varint(f);
 762                         gid_flags = 0;
 763                         if (xflags & XMIT_GROUP_NAME_FOLLOWS)
 764                                 gid = recv_group_name(f, gid, &gid_flags);
 765                         else if (inc_recurse && (!am_root || !numeric_ids))
 766                                 gid = match_gid(gid, &gid_flags);
 767                 }
 768         }
 769
 770         if ((preserve_devices && IS_DEVICE(mode))
 771          || (preserve_specials && IS_SPECIAL(mode))) {
 772                 if (protocol_version < 28) {
 773                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 774                                 rdev = (dev_t)read_int(f);
 775                 } else {
 776                         uint32 rdev_minor;
 777                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 778                                 rdev_major = read_varint30(f);
 779                         if (protocol_version >= 30)
 780                                 rdev_minor = read_varint(f);
 781                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 782                                 rdev_minor = read_byte(f);
 783                         else
 784                                 rdev_minor = read_int(f);
 785                         rdev = MAKEDEV(rdev_major, rdev_minor);
 786                 }
 787                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 788                 file_length = 0;
 789         } else if (protocol_version < 28)
 790                 rdev = MAKEDEV(0, 0);
 791
 792 #ifdef SUPPORT_LINKS
 793         if (preserve_links && S_ISLNK(mode)) {
 794                 linkname_len = read_varint30(f) + 1; /* count the '\0' */
 795                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 796                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 797                                 linkname_len - 1);
 798                         overflow_exit("recv_file_entry");
 799                 }
 800         }
 801         else
 802 #endif
 803                 linkname_len = 0;
 804
 805 #ifdef SUPPORT_HARD_LINKS
 806   create_object:
 807         if (preserve_hard_links) {
 808                 if (protocol_version < 28 && S_ISREG(mode))
 809                         xflags |= XMIT_HLINKED;
 810                 if (xflags & XMIT_HLINKED)
 811                         extra_len += EXTRA_LEN;
 812         }
 813 #endif
 814
 815 #ifdef SUPPORT_ACLS
 816         /* We need one or two index int32s when we're preserving ACLs. */
 817         if (preserve_acls)
 818                 extra_len += (S_ISDIR(mode) ? 2 : 1) * EXTRA_LEN;
 819 #endif
 820
 821         if (always_checksum && S_ISREG(mode))
 822                 extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
 823
 824         if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
 825                 extra_len += EXTRA_LEN;
 826
 827 #if EXTRA_ROUNDING > 0
 828         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
 829                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
 830 #endif
 831
 832         if (inc_recurse && S_ISDIR(mode)) {
 833                 if (one_file_system) {
 834                         /* Room to save the dir's device for -x */
 835                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 836                 }
 837                 pool = dir_flist->file_pool;
 838         } else
 839                 pool = flist->file_pool;
 840
 841         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
 842                   + linkname_len;
 843         bp = pool_alloc(pool, alloc_len, "recv_file_entry");
 844
 845         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
 846         bp += extra_len;
 847         file = (struct file_struct *)bp;
 848         bp += FILE_STRUCT_LEN;
 849
 850         memcpy(bp, basename, basename_len);
 851         bp += basename_len + linkname_len; /* skip space for symlink too */
 852
 853 #ifdef SUPPORT_HARD_LINKS
 854         if (xflags & XMIT_HLINKED)
 855                 file->flags |= FLAG_HLINKED;
 856 #endif
 857         file->modtime = (time_t)modtime;
 858         file->len32 = (uint32)file_length;
 859         if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
 860                 file->flags |= FLAG_LENGTH64;
 861                 OPT_EXTRA(file, 0)->unum = (uint32)(file_length >> 32);
 862         }
 863         file->mode = mode;
 864         if (uid_ndx)
 865                 F_OWNER(file) = uid;
 866         if (gid_ndx) {
 867                 F_GROUP(file) = gid;
 868                 file->flags |= gid_flags;
 869         }
 870 #ifdef ICONV_OPTION
 871         if (ic_ndx)
 872                 F_NDX(file) = flist->used + flist->ndx_start;
 873 #endif
 874
 875         if (basename != thisname) {
 876                 file->dirname = lastdir;
 877                 F_DEPTH(file) = lastdir_depth + 1;
 878         } else
 879                 F_DEPTH(file) = 1;
 880
 881         if (S_ISDIR(mode)) {
 882                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
 883                         F_DEPTH(file)--;
 884                 if (xflags & XMIT_TOP_DIR) {
 885                         in_del_hier = recurse;
 886                         del_hier_name_len = F_DEPTH(file) == 0 ? 0 : l1 + l2;
 887                         if (relative_paths && del_hier_name_len > 2
 888                             && lastname[del_hier_name_len-1] == '.'
 889                             && lastname[del_hier_name_len-2] == '/')
 890                                 del_hier_name_len -= 2;
 891                         file->flags |= FLAG_TOP_DIR | FLAG_XFER_DIR;
 892                 } else if (protocol_version >= 30) {
 893                         if (!(xflags & XMIT_NON_XFER_DIR))
 894                                 file->flags |= FLAG_XFER_DIR;
 895                 } else if (in_del_hier) {
 896                         if (!relative_paths || !del_hier_name_len
 897                          || (l1 >= del_hier_name_len
 898                           && lastname[del_hier_name_len] == '/'))
 899                                 file->flags |= FLAG_XFER_DIR;
 900                         else
 901                                 in_del_hier = 0;
 902                 }
 903         }
 904
 905         if ((preserve_devices && IS_DEVICE(mode))
 906          || (preserve_specials && IS_SPECIAL(mode))) {
 907                 uint32 *devp = F_RDEV_P(file);
 908                 DEV_MAJOR(devp) = major(rdev);
 909                 DEV_MINOR(devp) = minor(rdev);
 910         }
 911
 912 #ifdef SUPPORT_LINKS
 913         if (linkname_len) {
 914                 bp = (char*)file->basename + basename_len;
 915                 if (first_hlink_ndx >= 0) {
 916                         struct file_struct *first = flist->files[first_hlink_ndx];
 917                         memcpy(bp, F_SYMLINK(first), linkname_len);
 918                 } else
 919                         read_sbuf(f, bp, linkname_len - 1);
 920                 if (sanitize_paths)
 921                         sanitize_path(bp, bp, "", lastdir_depth, NULL);
 922         }
 923 #endif
 924
 925 #ifdef SUPPORT_HARD_LINKS
 926         if (preserve_hard_links && xflags & XMIT_HLINKED) {
 927                 if (protocol_version >= 30) {
 928                         F_HL_GNUM(file) = xflags & XMIT_HLINK_FIRST
 929                                         ? flist->used : first_hlink_ndx;
 930                 } else {
 931                         static int32 cnt = 0;
 932                         struct idev_node *np;
 933                         int64 ino;
 934                         int32 ndx;
 935                         if (protocol_version < 26) {
 936                                 dev = read_int(f);
 937                                 ino = read_int(f);
 938                         } else {
 939                                 if (!(xflags & XMIT_SAME_DEV_pre30))
 940                                         dev = read_longint(f);
 941                                 ino = read_longint(f);
 942                         }
 943                         np = idev_node(dev, ino);
 944                         ndx = (int32)(long)np->data - 1;
 945                         if (ndx < 0) {
 946                                 ndx = cnt++;
 947                                 np->data = (void*)(long)cnt;
 948                         }
 949                         F_HL_GNUM(file) = ndx;
 950                 }
 951         }
 952 #endif
 953
 954         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 955                 if (S_ISREG(mode))
 956                         bp = F_SUM(file);
 957                 else {
 958                         /* Prior to 28, we get a useless set of nulls. */
 959                         bp = tmp_sum;
 960                 }
 961                 if (first_hlink_ndx >= 0) {
 962                         struct file_struct *first = flist->files[first_hlink_ndx];
 963                         memcpy(bp, F_SUM(first), checksum_len);
 964                 } else
 965                         read_buf(f, bp, checksum_len);
 966         }
 967
 968 #ifdef SUPPORT_ACLS
 969         if (preserve_acls && !S_ISLNK(mode))
 970                 receive_acl(file, f);
 971 #endif
 972 #ifdef SUPPORT_XATTRS
 973         if (preserve_xattrs)
 974                 receive_xattr(file, f );
 975 #endif
 976
 977         if (S_ISREG(mode) || S_ISLNK(mode))
 978                 stats.total_size += file_length;
 979
 980         return file;
 981 }
 982
 983 /**
 984  * Create a file_struct for a named file by reading its stat()
 985  * information and performing extensive checks against global
 986  * options.
 987  *
 988  * @return the new file, or NULL if there was an error or this file
 989  * should be excluded.
 990  *
 991  * @todo There is a small optimization opportunity here to avoid
 992  * stat()ing the file in some circumstances, which has a certain cost.
 993  * We are called immediately after doing readdir(), and so we may
 994  * already know the d_type of the file.  We could for example avoid
 995  * statting directories if we're not recursing, but this is not a very
 996  * important case.  Some systems may not have d_type.
 997  **/
 998 struct file_struct *make_file(const char *fname, struct file_list *flist,
 999                               STRUCT_STAT *stp, int flags, int filter_level)
1000 {
1001         static char *lastdir;
1002         static int lastdir_len = -1;
1003         struct file_struct *file;
1004         STRUCT_STAT st;
1005         char thisname[MAXPATHLEN];
1006         char linkname[MAXPATHLEN];
1007         int alloc_len, basename_len, linkname_len;
1008         int extra_len = file_extra_cnt * EXTRA_LEN;
1009         const char *basename;
1010         alloc_pool_t *pool;
1011         char *bp;
1012
1013         if (strlcpy(thisname, fname, sizeof thisname) >= sizeof thisname) {
1014                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
1015                 return NULL;
1016         }
1017         clean_fname(thisname, 0);
1018         if (sanitize_paths)
1019                 sanitize_path(thisname, thisname, "", 0, NULL);
1020
1021         if (stp && S_ISDIR(stp->st_mode)) {
1022                 st = *stp; /* Needed for "symlink/." with --relative. */
1023                 *linkname = '\0'; /* make IBM code checker happy */
1024         } else if (readlink_stat(thisname, &st, linkname) != 0) {
1025                 int save_errno = errno;
1026                 /* See if file is excluded before reporting an error. */
1027                 if (filter_level != NO_FILTERS
1028                  && (is_excluded(thisname, 0, filter_level)
1029                   || is_excluded(thisname, 1, filter_level))) {
1030                         if (ignore_perishable && save_errno != ENOENT)
1031                                 non_perishable_cnt++;
1032                         return NULL;
1033                 }
1034                 if (save_errno == ENOENT) {
1035 #ifdef SUPPORT_LINKS
1036                         /* Avoid "vanished" error if symlink points nowhere. */
1037                         if (copy_links && x_lstat(thisname, &st, NULL) == 0
1038                             && S_ISLNK(st.st_mode)) {
1039                                 io_error |= IOERR_GENERAL;
1040                                 rprintf(FERROR, "symlink has no referent: %s\n",
1041                                         full_fname(thisname));
1042                         } else
1043 #endif
1044                         {
1045                                 enum logcode c = am_daemon && protocol_version < 28
1046                                     ? FERROR : FINFO;
1047                                 io_error |= IOERR_VANISHED;
1048                                 rprintf(c, "file has vanished: %s\n",
1049                                         full_fname(thisname));
1050                         }
1051                 } else {
1052                         io_error |= IOERR_GENERAL;
1053                         rsyserr(FERROR, save_errno, "readlink %s failed",
1054                                 full_fname(thisname));
1055                 }
1056                 return NULL;
1057         }
1058
1059         /* backup.c calls us with filter_level set to NO_FILTERS. */
1060         if (filter_level == NO_FILTERS)
1061                 goto skip_filters;
1062
1063         if (S_ISDIR(st.st_mode)) {
1064                 if (!xfer_dirs) {
1065                         rprintf(FINFO, "skipping directory %s\n", thisname);
1066                         return NULL;
1067                 }
1068         } else
1069                 flags &= ~FLAG_XFER_DIR;
1070
1071         /* -x only affects directories because we need to avoid recursing
1072          * into a mount-point directory, not to avoid copying a symlinked
1073          * file if -L (or similar) was specified. */
1074         if (one_file_system && st.st_dev != filesystem_dev
1075          && S_ISDIR(st.st_mode)) {
1076                 if (one_file_system > 1) {
1077                         if (verbose > 2) {
1078                                 rprintf(FINFO, "skipping mount-point dir %s\n",
1079                                         thisname);
1080                         }
1081                         return NULL;
1082                 }
1083                 flags |= FLAG_MOUNT_DIR;
1084         }
1085
1086         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level)) {
1087                 if (ignore_perishable)
1088                         non_perishable_cnt++;
1089                 return NULL;
1090         }
1091
1092         if (lp_ignore_nonreadable(module_id)) {
1093 #ifdef SUPPORT_LINKS
1094                 if (!S_ISLNK(st.st_mode))
1095 #endif
1096                         if (access(thisname, R_OK) != 0)
1097                                 return NULL;
1098         }
1099
1100   skip_filters:
1101
1102         /* Only divert a directory in the main transfer. */
1103         if (flist) {
1104                 if (flist->prev && S_ISDIR(st.st_mode)
1105                  && flags & FLAG_DIVERT_DIRS) {
1106                         /* Room for parent/sibling/next-child info. */
1107                         extra_len += DIRNODE_EXTRA_CNT * EXTRA_LEN;
1108                         dir_count++;
1109                         pool = dir_flist->file_pool;
1110                 } else
1111                         pool = flist->file_pool;
1112         } else
1113                 pool = NULL;
1114
1115         if (verbose > 2) {
1116                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
1117                         who_am_i(), thisname, filter_level);
1118         }
1119
1120         if ((basename = strrchr(thisname, '/')) != NULL) {
1121                 int len = basename++ - thisname;
1122                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
1123                         lastdir = new_array(char, len + 1);
1124                         memcpy(lastdir, thisname, len);
1125                         lastdir[len] = '\0';
1126                         lastdir_len = len;
1127                 }
1128         } else
1129                 basename = thisname;
1130         basename_len = strlen(basename) + 1; /* count the '\0' */
1131
1132 #ifdef SUPPORT_LINKS
1133         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
1134 #else
1135         linkname_len = 0;
1136 #endif
1137
1138         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
1139                 extra_len += EXTRA_LEN;
1140
1141 #if EXTRA_ROUNDING > 0
1142         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
1143                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
1144 #endif
1145
1146         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
1147                   + linkname_len;
1148         if (pool)
1149                 bp = pool_alloc(pool, alloc_len, "make_file");
1150         else {
1151                 if (!(bp = new_array(char, alloc_len)))
1152                         out_of_memory("make_file");
1153         }
1154
1155         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
1156         bp += extra_len;
1157         file = (struct file_struct *)bp;
1158         bp += FILE_STRUCT_LEN;
1159
1160         memcpy(bp, basename, basename_len);
1161         bp += basename_len + linkname_len; /* skip space for symlink too */
1162
1163 #ifdef SUPPORT_HARD_LINKS
1164         if (preserve_hard_links && flist && flist->prev) {
1165                 if (protocol_version >= 28
1166                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
1167                  : S_ISREG(st.st_mode)) {
1168                         tmp_dev = st.st_dev;
1169                         tmp_ino = st.st_ino;
1170                 } else
1171                         tmp_dev = 0;
1172         }
1173 #endif
1174
1175 #ifdef HAVE_STRUCT_STAT_ST_RDEV
1176         if (IS_DEVICE(st.st_mode) || IS_SPECIAL(st.st_mode)) {
1177                 tmp_rdev = st.st_rdev;
1178                 st.st_size = 0;
1179         }
1180 #endif
1181
1182         file->flags = flags;
1183         file->modtime = st.st_mtime;
1184         file->len32 = (uint32)st.st_size;
1185         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
1186                 file->flags |= FLAG_LENGTH64;
1187                 OPT_EXTRA(file, 0)->unum = (uint32)(st.st_size >> 32);
1188         }
1189         file->mode = st.st_mode;
1190         if (uid_ndx)
1191                 F_OWNER(file) = st.st_uid;
1192         if (gid_ndx)
1193                 F_GROUP(file) = st.st_gid;
1194
1195         if (basename != thisname)
1196                 file->dirname = lastdir;
1197
1198 #ifdef SUPPORT_LINKS
1199         if (linkname_len) {
1200                 bp = (char*)file->basename + basename_len;
1201                 memcpy(bp, linkname, linkname_len);
1202         }
1203 #endif
1204
1205         if (always_checksum && am_sender && S_ISREG(st.st_mode))
1206                 file_checksum(thisname, tmp_sum, st.st_size);
1207
1208         F_PATHNAME(file) = pathname;
1209
1210         /* This code is only used by the receiver when it is building
1211          * a list of files for a delete pass. */
1212         if (keep_dirlinks && linkname_len && flist) {
1213                 STRUCT_STAT st2;
1214                 int save_mode = file->mode;
1215                 file->mode = S_IFDIR; /* Find a directory with our name. */
1216                 if (flist_find(dir_flist, file) >= 0
1217                  && x_stat(thisname, &st2, NULL) == 0 && S_ISDIR(st2.st_mode)) {
1218                         file->modtime = st2.st_mtime;
1219                         file->len32 = 0;
1220                         file->mode = st2.st_mode;
1221                         if (uid_ndx)
1222                                 F_OWNER(file) = st2.st_uid;
1223                         if (gid_ndx)
1224                                 F_GROUP(file) = st2.st_gid;
1225                 } else
1226                         file->mode = save_mode;
1227         }
1228
1229         if (basename_len == 0+1)
1230                 return NULL;
1231
1232 #ifdef ICONV_OPTION
1233         if (ic_ndx)
1234                 F_NDX(file) = dir_count - 1;
1235 #endif
1236
1237         return file;
1238 }
1239
1240 /* Only called for temporary file_struct entries created by make_file(). */
1241 void unmake_file(struct file_struct *file)
1242 {
1243         int extra_cnt = file_extra_cnt + LEN64_BUMP(file);
1244 #if EXTRA_ROUNDING > 0
1245         if (extra_cnt & EXTRA_ROUNDING)
1246                 extra_cnt = (extra_cnt | EXTRA_ROUNDING) + 1;
1247 #endif
1248         free(REQ_EXTRA(file, extra_cnt));
1249 }
1250
1251 static struct file_struct *send_file_name(int f, struct file_list *flist,
1252                                           char *fname, STRUCT_STAT *stp,
1253                                           int flags, int filter_level)
1254 {
1255         struct file_struct *file;
1256 #if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
1257         statx sx;
1258 #endif
1259
1260         file = make_file(fname, flist, stp, flags, filter_level);
1261         if (!file)
1262                 return NULL;
1263
1264         if (chmod_modes && !S_ISLNK(file->mode))
1265                 file->mode = tweak_mode(file->mode, chmod_modes);
1266
1267 #ifdef SUPPORT_ACLS
1268         if (preserve_acls && !S_ISLNK(file->mode) && f >= 0) {
1269                 sx.st.st_mode = file->mode;
1270                 sx.acc_acl = sx.def_acl = NULL;
1271                 if (get_acl(fname, &sx) < 0)
1272                         return NULL;
1273         }
1274 #endif
1275 #ifdef SUPPORT_XATTRS
1276         if (preserve_xattrs && f >= 0) {
1277                 sx.xattr = NULL;
1278                 if (get_xattr(fname, &sx) < 0)
1279                         return NULL;
1280         }
1281 #endif
1282
1283         maybe_emit_filelist_progress(flist->used + flist_count_offset);
1284
1285         flist_expand(flist, 1);
1286         flist->files[flist->used++] = file;
1287         if (f >= 0) {
1288                 send_file_entry(f, file, flist->used - 1);
1289 #ifdef SUPPORT_ACLS
1290                 if (preserve_acls && !S_ISLNK(file->mode)) {
1291                         send_acl(&sx, f);
1292                         free_acl(&sx);
1293                 }
1294 #endif
1295 #ifdef SUPPORT_XATTRS
1296                 if (preserve_xattrs) {
1297                         F_XATTR(file) = send_xattr(&sx, f);
1298                         free_xattr(&sx);
1299                 }
1300 #endif
1301         }
1302         return file;
1303 }
1304
1305 static void send_if_directory(int f, struct file_list *flist,
1306                               struct file_struct *file,
1307                               char *fbuf, unsigned int ol,
1308                               int flags)
1309 {
1310         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1311
1312         if (S_ISDIR(file->mode)
1313             && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) {
1314                 void *save_filters;
1315                 unsigned int len = strlen(fbuf);
1316                 if (len > 1 && fbuf[len-1] == '/')
1317                         fbuf[--len] = '\0';
1318                 if (len >= MAXPATHLEN - 1) {
1319                         io_error |= IOERR_GENERAL;
1320                         rprintf(FERROR, "skipping long-named directory: %s\n",
1321                                 full_fname(fbuf));
1322                         return;
1323                 }
1324                 save_filters = push_local_filters(fbuf, len);
1325                 send_directory(f, flist, fbuf, len, flags);
1326                 pop_local_filters(save_filters);
1327                 fbuf[ol] = '\0';
1328                 if (is_dot_dir)
1329                         fbuf[ol-1] = '.';
1330         }
1331 }
1332
1333 static int file_compare(const void *file1, const void *file2)
1334 {
1335         return f_name_cmp(*(struct file_struct **)file1,
1336                           *(struct file_struct **)file2);
1337 }
1338
1339 /* The guts of a merge-sort algorithm.  This was derived from the glibc
1340  * version, but I (Wayne) changed the merge code to do less copying and
1341  * to require only half the amount of temporary memory. */
1342 static void fsort_tmp(struct file_struct **fp, size_t num,
1343                       struct file_struct **tmp)
1344 {
1345         struct file_struct **f1, **f2, **t;
1346         size_t n1, n2;
1347
1348         n1 = num / 2;
1349         n2 = num - n1;
1350         f1 = fp;
1351         f2 = fp + n1;
1352
1353         if (n1 > 1)
1354                 fsort_tmp(f1, n1, tmp);
1355         if (n2 > 1)
1356                 fsort_tmp(f2, n2, tmp);
1357
1358         while (f_name_cmp(*f1, *f2) <= 0) {
1359                 if (!--n1)
1360                         return;
1361                 f1++;
1362         }
1363
1364         t = tmp;
1365         memcpy(t, f1, n1 * PTR_SIZE);
1366
1367         *f1++ = *f2++, n2--;
1368
1369         while (n1 > 0 && n2 > 0) {
1370                 if (f_name_cmp(*t, *f2) <= 0)
1371                         *f1++ = *t++, n1--;
1372                 else
1373                         *f1++ = *f2++, n2--;
1374         }
1375
1376         if (n1 > 0)
1377                 memcpy(f1, t, n1 * PTR_SIZE);
1378 }
1379
1380 /* This file-struct sorting routine makes sure that any identical names in
1381  * the file list stay in the same order as they were in the original list.
1382  * This is particularly vital in inc_recurse mode where we expect a sort
1383  * on the flist to match the exact order of a sort on the dir_flist. */
1384 static void fsort(struct file_struct **fp, size_t num)
1385 {
1386         if (num <= 1)
1387                 return;
1388
1389         if (use_qsort)
1390                 qsort(fp, num, PTR_SIZE, file_compare);
1391         else {
1392                 struct file_struct **tmp = new_array(struct file_struct *,
1393                                                      (num+1) / 2);
1394                 fsort_tmp(fp, num, tmp);
1395                 free(tmp);
1396         }
1397 }
1398
1399 /* We take an entire set of sibling dirs from the sorted flist and link them
1400  * into the tree, setting the appropriate parent/child/sibling pointers. */
1401 static void add_dirs_to_tree(int parent_ndx, struct file_list *from_flist,
1402                              int dir_cnt)
1403 {
1404         int i;
1405         int32 *dp = NULL;
1406         int32 *parent_dp = parent_ndx < 0 ? NULL
1407                          : F_DIR_NODE_P(dir_flist->sorted[parent_ndx]);
1408
1409         flist_expand(dir_flist, dir_cnt);
1410         dir_flist->sorted = dir_flist->files;
1411
1412         for (i = 0; dir_cnt; i++) {
1413                 struct file_struct *file = from_flist->sorted[i];
1414
1415                 if (!S_ISDIR(file->mode))
1416                         continue;
1417
1418                 dir_flist->files[dir_flist->used++] = file;
1419                 dir_cnt--;
1420
1421                 if (!(file->flags & FLAG_XFER_DIR)
1422                  || file->flags & FLAG_MOUNT_DIR)
1423                         continue;
1424
1425                 if (dp)
1426                         DIR_NEXT_SIBLING(dp) = dir_flist->used - 1;
1427                 else if (parent_dp)
1428                         DIR_FIRST_CHILD(parent_dp) = dir_flist->used - 1;
1429                 else
1430                         send_dir_ndx = dir_flist->used - 1;
1431
1432                 dp = F_DIR_NODE_P(file);
1433                 DIR_PARENT(dp) = parent_ndx;
1434                 DIR_FIRST_CHILD(dp) = -1;
1435         }
1436         if (dp)
1437                 DIR_NEXT_SIBLING(dp) = -1;
1438 }
1439
1440 /* This function is normally called by the sender, but the receiving side also
1441  * calls it from get_dirlist() with f set to -1 so that we just construct the
1442  * file list in memory without sending it over the wire.  Also, get_dirlist()
1443  * might call this with f set to -2, which also indicates that local filter
1444  * rules should be ignored. */
1445 static void send_directory(int f, struct file_list *flist, char *fbuf, int len,
1446                            int flags)
1447 {
1448         struct dirent *di;
1449         unsigned remainder;
1450         char *p;
1451         DIR *d;
1452         int divert_dirs = (flags & FLAG_DIVERT_DIRS) != 0;
1453         int start = flist->used;
1454         int filter_level = f == -2 ? SERVER_FILTERS : ALL_FILTERS;
1455
1456         assert(flist != NULL);
1457
1458         if (!(d = opendir(fbuf))) {
1459                 io_error |= IOERR_GENERAL;
1460                 rsyserr(FERROR, errno, "opendir %s failed", full_fname(fbuf));
1461                 return;
1462         }
1463
1464         p = fbuf + len;
1465         if (len != 1 || *fbuf != '/')
1466                 *p++ = '/';
1467         *p = '\0';
1468         remainder = MAXPATHLEN - (p - fbuf);
1469
1470         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1471                 char *dname = d_name(di);
1472                 if (dname[0] == '.' && (dname[1] == '\0'
1473                     || (dname[1] == '.' && dname[2] == '\0')))
1474                         continue;
1475                 if (strlcpy(p, dname, remainder) >= remainder) {
1476                         io_error |= IOERR_GENERAL;
1477                         rprintf(FINFO,
1478                                 "cannot send long-named file %s\n",
1479                                 full_fname(fbuf));
1480                         continue;
1481                 }
1482                 if (dname[0] == '\0') {
1483                         io_error |= IOERR_GENERAL;
1484                         rprintf(FINFO,
1485                                 "cannot send file with empty name in %s\n",
1486                                 full_fname(fbuf));
1487                         continue;
1488                 }
1489
1490                 send_file_name(f, flist, fbuf, NULL, flags, filter_level);
1491         }
1492
1493         fbuf[len] = '\0';
1494
1495         if (errno) {
1496                 io_error |= IOERR_GENERAL;
1497                 rsyserr(FERROR, errno, "readdir(%s)", full_fname(fbuf));
1498         }
1499
1500         closedir(d);
1501
1502         if (f >= 0 && recurse && !divert_dirs) {
1503                 int i, end = flist->used - 1;
1504                 /* send_if_directory() bumps flist->used, so use "end". */
1505                 for (i = start; i <= end; i++)
1506                         send_if_directory(f, flist, flist->files[i], fbuf, len, flags);
1507         }
1508 }
1509
1510 static void send1extra(int f, struct file_struct *file, struct file_list *flist)
1511 {
1512         char fbuf[MAXPATHLEN];
1513         int dlen;
1514
1515         f_name(file, fbuf);
1516         dlen = strlen(fbuf);
1517
1518         if (F_PATHNAME(file) != pathname) {
1519                 if (!push_pathname(F_PATHNAME(file), -1))
1520                         exit_cleanup(RERR_FILESELECT);
1521         }
1522
1523         change_local_filter_dir(fbuf, dlen, send_dir_depth);
1524
1525         send_directory(f, flist, fbuf, dlen, FLAG_DIVERT_DIRS | FLAG_XFER_DIR);
1526 }
1527
1528 void send_extra_file_list(int f, int at_least)
1529 {
1530         struct file_list *flist;
1531         int64 start_write;
1532         int future_cnt, save_io_error = io_error;
1533
1534         if (flist_eof)
1535                 return;
1536
1537         /* Keep sending data until we have the requested number of
1538          * files in the upcoming file-lists. */
1539         if (cur_flist->next) {
1540                 flist = first_flist->prev; /* the newest flist */
1541                 future_cnt = flist->ndx_end - cur_flist->next->ndx_start + 1;
1542         } else
1543                 future_cnt = 0;
1544         while (future_cnt < at_least) {
1545                 struct file_struct *file = dir_flist->sorted[send_dir_ndx];
1546                 int dir_ndx, dstart = dir_count;
1547                 int32 *dp;
1548
1549                 flist = flist_new(0, "send_extra_file_list");
1550                 start_write = stats.total_written;
1551
1552 #ifdef ICONV_OPTION
1553                 if (ic_ndx)
1554                         dir_ndx = F_NDX(file);
1555                 else
1556 #endif
1557                         dir_ndx = send_dir_ndx;
1558                 write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
1559                 flist->parent_ndx = dir_ndx;
1560
1561                 send1extra(f, file, flist);
1562                 dp = F_DIR_NODE_P(file);
1563
1564                 /* If there are any duplicate directory names that follow, we
1565                  * send all the dirs together in one file-list.  The dir_flist
1566                  * tree links all the child subdirs onto the last dup dir. */
1567                 while ((dir_ndx = DIR_NEXT_SIBLING(dp)) >= 0
1568                     && dir_flist->sorted[dir_ndx]->flags & FLAG_DUPLICATE) {
1569                         send_dir_ndx = dir_ndx;
1570                         file = dir_flist->sorted[dir_ndx];
1571                         send1extra(f, file, flist);
1572                         dp = F_DIR_NODE_P(file);
1573                 }
1574
1575                 write_byte(f, 0);
1576
1577 #ifdef ICONV_OPTION
1578                 if (need_unsorted_flist) {
1579                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
1580                                 out_of_memory("send_extra_file_list");
1581                         memcpy(flist->sorted, flist->files,
1582                                flist->used * sizeof (struct file_struct*));
1583                 } else
1584 #endif
1585                         flist->sorted = flist->files;
1586
1587                 clean_flist(flist, 0);
1588
1589                 flist->ndx_end = flist->ndx_start + flist->used - 1
1590                                - (dir_count - dstart);
1591
1592                 add_dirs_to_tree(send_dir_ndx, flist, dir_count - dstart);
1593                 flist_done_allocating(flist);
1594
1595                 file_total += flist->used;
1596                 future_cnt += flist->used;
1597                 stats.flist_size += stats.total_written - start_write;
1598                 stats.num_files += flist->used;
1599                 if (verbose > 3)
1600                         output_flist(flist);
1601
1602                 if (DIR_FIRST_CHILD(dp) >= 0) {
1603                         send_dir_ndx = DIR_FIRST_CHILD(dp);
1604                         send_dir_depth++;
1605                 } else {
1606                         while (DIR_NEXT_SIBLING(dp) < 0) {
1607                                 if ((send_dir_ndx = DIR_PARENT(dp)) < 0) {
1608                                         write_ndx(f, NDX_FLIST_EOF);
1609                                         flist_eof = 1;
1610                                         change_local_filter_dir(NULL, 0, 0);
1611                                         goto finish;
1612                                 }
1613                                 send_dir_depth--;
1614                                 file = dir_flist->sorted[send_dir_ndx];
1615                                 dp = F_DIR_NODE_P(file);
1616                         }
1617                         send_dir_ndx = DIR_NEXT_SIBLING(dp);
1618                 }
1619         }
1620
1621   finish:
1622         if (io_error != save_io_error && !ignore_errors)
1623                 send_msg_int(MSG_IO_ERROR, io_error);
1624 }
1625
1626 struct file_list *send_file_list(int f, int argc, char *argv[])
1627 {
1628         static const char *lastdir;
1629         static int lastdir_len = -1;
1630         int len, dirlen;
1631         STRUCT_STAT st;
1632         char *p, *dir;
1633         char lastpath[MAXPATHLEN] = "";
1634         struct file_list *flist;
1635         struct timeval start_tv, end_tv;
1636         int64 start_write;
1637         int use_ff_fd = 0;
1638         int flags, disable_buffering;
1639
1640         rprintf(FLOG, "building file list\n");
1641         if (show_filelist_p())
1642                 start_filelist_progress("building file list");
1643         else if (inc_recurse && verbose && !am_server)
1644                 rprintf(FCLIENT, "sending incremental file list\n");
1645
1646         start_write = stats.total_written;
1647         gettimeofday(&start_tv, NULL);
1648
1649 #ifdef SUPPORT_HARD_LINKS
1650         if (preserve_hard_links && protocol_version >= 30 && !cur_flist)
1651                 init_hard_links();
1652 #endif
1653
1654         flist = cur_flist = flist_new(0, "send_file_list");
1655         if (inc_recurse) {
1656                 dir_flist = flist_new(FLIST_TEMP, "send_file_list");
1657                 flags = FLAG_DIVERT_DIRS | FLAG_XFER_DIR;
1658         } else {
1659                 dir_flist = cur_flist;
1660                 flags = FLAG_XFER_DIR;
1661         }
1662
1663         disable_buffering = io_start_buffering_out(f);
1664         if (filesfrom_fd >= 0) {
1665                 if (argv[0] && !push_dir(argv[0], 0)) {
1666                         rsyserr(FERROR, errno, "push_dir %s failed in %s",
1667                                 full_fname(argv[0]), curr_dir);
1668                         exit_cleanup(RERR_FILESELECT);
1669                 }
1670                 use_ff_fd = 1;
1671         }
1672
1673         while (1) {
1674                 char fbuf[MAXPATHLEN];
1675                 char *fn;
1676                 int is_dot_dir;
1677
1678                 if (use_ff_fd) {
1679                         if (read_filesfrom_line(filesfrom_fd, fbuf) == 0)
1680                                 break;
1681                         sanitize_path(fbuf, fbuf, "", 0, NULL);
1682                 } else {
1683                         if (argc-- == 0)
1684                                 break;
1685                         strlcpy(fbuf, *argv++, MAXPATHLEN);
1686                         if (sanitize_paths)
1687                                 sanitize_path(fbuf, fbuf, "", 0, NULL);
1688                 }
1689
1690                 len = strlen(fbuf);
1691                 if (relative_paths) {
1692                         /* We clean up fbuf below. */
1693                         is_dot_dir = 0;
1694                 } else if (!len || fbuf[len - 1] == '/') {
1695                         if (len == 2 && fbuf[0] == '.') {
1696                                 /* Turn "./" into just "." rather than "./." */
1697                                 fbuf[1] = '\0';
1698                         } else {
1699                                 if (len + 1 >= MAXPATHLEN)
1700                                         overflow_exit("send_file_list");
1701                                 fbuf[len++] = '.';
1702                                 fbuf[len] = '\0';
1703                         }
1704                         is_dot_dir = 1;
1705                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
1706                     && (len == 2 || fbuf[len-3] == '/')) {
1707                         if (len + 2 >= MAXPATHLEN)
1708                                 overflow_exit("send_file_list");
1709                         fbuf[len++] = '/';
1710                         fbuf[len++] = '.';
1711                         fbuf[len] = '\0';
1712                         is_dot_dir = 1;
1713                 } else {
1714                         is_dot_dir = fbuf[len-1] == '.'
1715                                    && (len == 1 || fbuf[len-2] == '/');
1716                 }
1717
1718                 dir = NULL;
1719
1720                 if (!relative_paths) {
1721                         p = strrchr(fbuf, '/');
1722                         if (p) {
1723                                 *p = '\0';
1724                                 if (p == fbuf)
1725                                         dir = "/";
1726                                 else
1727                                         dir = fbuf;
1728                                 len -= p - fbuf + 1;
1729                                 fn = p + 1;
1730                         } else
1731                                 fn = fbuf;
1732                 } else {
1733                         if ((p = strstr(fbuf, "/./")) != NULL) {
1734                                 *p = '\0';
1735                                 if (p == fbuf)
1736                                         dir = "/";
1737                                 else
1738                                         dir = fbuf;
1739                                 len -= p - fbuf + 3;
1740                                 fn = p + 3;
1741                         } else
1742                                 fn = fbuf;
1743                         /* Get rid of trailing "/" and "/.". */
1744                         while (len) {
1745                                 if (fn[len - 1] == '/') {
1746                                         is_dot_dir = 1;
1747                                         if (!--len && !dir) {
1748                                                 len++;
1749                                                 break;
1750                                         }
1751                                 }
1752                                 else if (len >= 2 && fn[len - 1] == '.'
1753                                                   && fn[len - 2] == '/') {
1754                                         is_dot_dir = 1;
1755                                         if (!(len -= 2) && !dir) {
1756                                                 len++;
1757                                                 break;
1758                                         }
1759                                 } else
1760                                         break;
1761                         }
1762                         if (len == 1 && fn[0] == '/')
1763                                 fn[len++] = '.';
1764                         fn[len] = '\0';
1765                         /* Reject a ".." dir in the active part of the path. */
1766                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
1767                                 if ((p[2] == '/' || p[2] == '\0')
1768                                  && (p == fn || p[-1] == '/')) {
1769                                         rprintf(FERROR,
1770                                             "found \"..\" dir in relative path: %s\n",
1771                                             fbuf);
1772                                         exit_cleanup(RERR_SYNTAX);
1773                                 }
1774                         }
1775                 }
1776
1777                 if (!*fn) {
1778                         len = 1;
1779                         fn = ".";
1780                 }
1781
1782                 dirlen = dir ? strlen(dir) : 0;
1783                 if (dirlen != lastdir_len || memcmp(lastdir, dir, dirlen) != 0) {
1784                         if (!push_pathname(dir ? strdup(dir) : NULL, dirlen))
1785                                 goto push_error;
1786                         lastdir = pathname;
1787                         lastdir_len = pathname_len;
1788                 } else if (!push_pathname(lastdir, lastdir_len)) {
1789                   push_error:
1790                         io_error |= IOERR_GENERAL;
1791                         rsyserr(FERROR, errno, "push_dir %s failed in %s",
1792                                 full_fname(dir), curr_dir);
1793                         continue;
1794                 }
1795
1796                 if (fn != fbuf)
1797                         memmove(fbuf, fn, len + 1);
1798
1799                 if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1800                         io_error |= IOERR_GENERAL;
1801                         rsyserr(FERROR, errno, "link_stat %s failed",
1802                                 full_fname(fbuf));
1803                         continue;
1804                 }
1805
1806                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
1807                         rprintf(FINFO, "skipping directory %s\n", fbuf);
1808                         continue;
1809                 }
1810
1811                 if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
1812                         /* Send the implied directories at the start of the
1813                          * source spec, so we get their permissions right. */
1814                         char *lp = lastpath, *slash = fbuf;
1815                         *p = '\0';
1816                         /* Skip any initial directories in our path that we
1817                          * have in common with lastpath. */
1818                         for (fn = fbuf; *fn && *lp == *fn; lp++, fn++) {
1819                                 if (*fn == '/')
1820                                         slash = fn;
1821                         }
1822                         *p = '/';
1823                         if (fn != p || (*lp && *lp != '/')) {
1824                                 int save_copy_links = copy_links;
1825                                 int save_xfer_dirs = xfer_dirs;
1826                                 int dir_flags = flags & ~FLAG_XFER_DIR;
1827                                 copy_links |= copy_unsafe_links;
1828                                 xfer_dirs = 1;
1829                                 while ((slash = strchr(slash+1, '/')) != 0) {
1830                                         *slash = '\0';
1831                                         send_file_name(f, flist, fbuf, NULL,
1832                                                        dir_flags, ALL_FILTERS);
1833                                         *slash = '/';
1834                                 }
1835                                 copy_links = save_copy_links;
1836                                 xfer_dirs = save_xfer_dirs;
1837                                 *p = '\0';
1838                                 strlcpy(lastpath, fbuf, sizeof lastpath);
1839                                 *p = '/';
1840                         }
1841                 }
1842
1843                 if (one_file_system)
1844                         filesystem_dev = st.st_dev;
1845
1846                 if (recurse || (xfer_dirs && is_dot_dir)) {
1847                         struct file_struct *file;
1848                         int top_flags = FLAG_TOP_DIR | flags;
1849                         file = send_file_name(f, flist, fbuf, &st,
1850                                               top_flags, ALL_FILTERS);
1851                         if (file && !inc_recurse)
1852                                 send_if_directory(f, flist, file, fbuf, len, flags);
1853                 } else
1854                         send_file_name(f, flist, fbuf, &st, flags, ALL_FILTERS);
1855         }
1856
1857         gettimeofday(&end_tv, NULL);
1858         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
1859                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
1860         if (stats.flist_buildtime == 0)
1861                 stats.flist_buildtime = 1;
1862         start_tv = end_tv;
1863
1864         write_byte(f, 0); /* Indicate end of file list */
1865
1866 #ifdef SUPPORT_HARD_LINKS
1867         if (preserve_hard_links && protocol_version >= 30 && !inc_recurse)
1868                 idev_destroy();
1869 #endif
1870
1871         if (show_filelist_p())
1872                 finish_filelist_progress(flist);
1873
1874         gettimeofday(&end_tv, NULL);
1875         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
1876                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
1877
1878         /* When converting names, both sides keep an unsorted file-list array
1879          * because the names will differ on the sending and receiving sides
1880          * (both sides will use the unsorted index number for each item). */
1881
1882         /* Sort the list without removing any duplicates.  This allows the
1883          * receiving side to ask for whatever name it kept.  For incremental
1884          * recursion mode, the sender marks duplicate dirs so that it can
1885          * send them together in a single file-list. */
1886 #ifdef ICONV_OPTION
1887         if (need_unsorted_flist) {
1888                 if (inc_recurse) {
1889                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
1890                                 out_of_memory("send_file_list");
1891                         memcpy(flist->sorted, flist->files,
1892                                flist->used * sizeof (struct file_struct*));
1893                         clean_flist(flist, 0);
1894                 } else {
1895                         flist->sorted = flist->files;
1896                         flist->low = 0;
1897                         flist->high = flist->used - 1;
1898                 }
1899         } else
1900 #endif
1901         {
1902                 flist->sorted = flist->files;
1903                 clean_flist(flist, 0);
1904         }
1905         file_total += flist->used;
1906
1907         /* We don't subtract dir_count for the first send since we
1908          * might have one or more dot dirs which need to get sent. */
1909         flist->ndx_end = flist->ndx_start + flist->used - 1;
1910
1911         if (!numeric_ids && !inc_recurse)
1912                 send_id_list(f);
1913
1914         /* send the io_error flag */
1915         if (protocol_version < 30)
1916                 write_int(f, ignore_errors ? 0 : io_error);
1917         else if (io_error && !ignore_errors)
1918                 send_msg_int(MSG_IO_ERROR, io_error);
1919
1920         if (disable_buffering)
1921                 io_end_buffering_out();
1922
1923         stats.flist_size = stats.total_written - start_write;
1924         stats.num_files = flist->used;
1925
1926         if (verbose > 3)
1927                 output_flist(flist);
1928
1929         if (verbose > 2)
1930                 rprintf(FINFO, "send_file_list done\n");
1931
1932         if (inc_recurse) {
1933                 add_dirs_to_tree(-1, flist, dir_count);
1934                 flist_done_allocating(flist);
1935                 if (send_dir_ndx < 0) {
1936                         write_ndx(f, NDX_FLIST_EOF);
1937                         flist_eof = 1;
1938                 }
1939                 else if (file_total == 1) {
1940                         /* If we're creating incremental file-lists and there
1941                          * was just 1 item in the first file-list, send 1 more
1942                          * file-list to check if this is a 1-file xfer. */
1943                         send_extra_file_list(f, 1);
1944                 }
1945         }
1946
1947         return flist;
1948 }
1949
1950 struct file_list *recv_file_list(int f)
1951 {
1952         struct file_list *flist;
1953         int dstart, flags;
1954         int64 start_read;
1955
1956         if (!first_flist)
1957                 rprintf(FLOG, "receiving file list\n");
1958         if (show_filelist_p())
1959                 start_filelist_progress("receiving file list");
1960         else if (inc_recurse && verbose && !am_server && !first_flist)
1961                 rprintf(FCLIENT, "receiving incremental file list\n");
1962
1963         start_read = stats.total_read;
1964
1965         flist = flist_new(0, "recv_file_list");
1966
1967 #ifdef SUPPORT_HARD_LINKS
1968         if (preserve_hard_links && protocol_version < 30)
1969                 init_hard_links();
1970 #endif
1971
1972         if (inc_recurse) {
1973                 if (flist->ndx_start == 0)
1974                         dir_flist = flist_new(FLIST_TEMP, "recv_file_list");
1975                 dstart = dir_flist->used;
1976         } else {
1977                 dir_flist = flist;
1978                 dstart = 0;
1979         }
1980
1981         while ((flags = read_byte(f)) != 0) {
1982                 struct file_struct *file;
1983
1984                 flist_expand(flist, 1);
1985
1986                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
1987                         flags |= read_byte(f) << 8;
1988                 file = recv_file_entry(flist, flags, f);
1989
1990                 if (inc_recurse && S_ISDIR(file->mode)) {
1991                         flist_expand(dir_flist, 1);
1992                         dir_flist->files[dir_flist->used++] = file;
1993                 }
1994
1995                 flist->files[flist->used++] = file;
1996
1997                 maybe_emit_filelist_progress(flist->used);
1998
1999                 if (verbose > 2) {
2000                         rprintf(FINFO, "recv_file_name(%s)\n",
2001                                 f_name(file, NULL));
2002                 }
2003         }
2004         file_total += flist->used;
2005
2006         flist->ndx_end = flist->ndx_start + flist->used - 1;
2007         if (inc_recurse && flist->ndx_start)
2008                 flist->ndx_end -= dir_flist->used - dstart;
2009
2010         if (verbose > 2)
2011                 rprintf(FINFO, "received %d names\n", flist->used);
2012
2013         if (show_filelist_p())
2014                 finish_filelist_progress(flist);
2015
2016 #ifdef ICONV_OPTION
2017         if (need_unsorted_flist) {
2018                 /* Create an extra array of index pointers that we can sort for
2019                  * the generator's use (for wading through the files in sorted
2020                  * order and for calling flist_find()).  We keep the "files"
2021                  * list unsorted for our exchange of index numbers with the
2022                  * other side (since their names may not sort the same). */
2023                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2024                         out_of_memory("recv_file_list");
2025                 memcpy(flist->sorted, flist->files,
2026                        flist->used * sizeof (struct file_struct*));
2027                 if (inc_recurse && dir_flist->used > dstart) {
2028                         dir_flist->sorted = realloc_array(dir_flist->sorted,
2029                                                 struct file_struct *,
2030                                                 dir_flist->used);
2031                         memcpy(dir_flist->sorted + dstart, dir_flist->files + dstart,
2032                                (dir_flist->used - dstart) * sizeof (struct file_struct*));
2033                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2034                 }
2035         } else
2036 #endif
2037         {
2038                 flist->sorted = flist->files;
2039                 if (inc_recurse && dir_flist->used > dstart) {
2040                         dir_flist->sorted = dir_flist->files;
2041                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2042                 }
2043         }
2044
2045         if (inc_recurse)
2046                 flist_done_allocating(flist);
2047         else if (f >= 0)
2048                 recv_id_list(f, flist);
2049
2050         clean_flist(flist, relative_paths);
2051
2052         if (protocol_version < 30) {
2053                 /* Recv the io_error flag */
2054                 if (ignore_errors)
2055                         read_int(f);
2056                 else
2057                         io_error |= read_int(f);
2058         }
2059
2060         if (verbose > 3)
2061                 output_flist(flist);
2062
2063         if (list_only) {
2064                 int i;
2065                 for (i = flist->low; i <= flist->high; i++)
2066                         list_file_entry(flist->files[i]);
2067         }
2068
2069         if (verbose > 2)
2070                 rprintf(FINFO, "recv_file_list done\n");
2071
2072         stats.flist_size += stats.total_read - start_read;
2073         stats.num_files += flist->used;
2074
2075         return flist;
2076 }
2077
2078 /* This is only used once by the receiver if the very first file-list
2079  * has exactly one item in it. */
2080 void recv_additional_file_list(int f)
2081 {
2082         struct file_list *flist;
2083         int ndx = read_ndx(f);
2084         if (ndx == NDX_FLIST_EOF) {
2085                 flist_eof = 1;
2086                 change_local_filter_dir(NULL, 0, 0);
2087         } else {
2088                 ndx = NDX_FLIST_OFFSET - ndx;
2089                 if (ndx < 0 || ndx >= dir_flist->used) {
2090                         ndx = NDX_FLIST_OFFSET - ndx;
2091                         rprintf(FERROR,
2092                                 "[%s] Invalid dir index: %d (%d - %d)\n",
2093                                 who_am_i(), ndx, NDX_FLIST_OFFSET,
2094                                 NDX_FLIST_OFFSET - dir_flist->used + 1);
2095                         exit_cleanup(RERR_PROTOCOL);
2096                 }
2097                 if (verbose > 3) {
2098                         rprintf(FINFO, "[%s] receiving flist for dir %d\n",
2099                                 who_am_i(), ndx);
2100                 }
2101                 flist = recv_file_list(f);
2102                 flist->parent_ndx = ndx;
2103         }
2104 }
2105
2106 /* Search for an identically-named item in the file list.  Note that the
2107  * items must agree in their directory-ness, or no match is returned. */
2108 int flist_find(struct file_list *flist, struct file_struct *f)
2109 {
2110         int low = flist->low, high = flist->high;
2111         int diff, mid, mid_up;
2112
2113         while (low <= high) {
2114                 mid = (low + high) / 2;
2115                 if (F_IS_ACTIVE(flist->sorted[mid]))
2116                         mid_up = mid;
2117                 else {
2118                         /* Scan for the next non-empty entry using the cached
2119                          * distance values.  If the value isn't fully up-to-
2120                          * date, update it. */
2121                         mid_up = mid + F_DEPTH(flist->sorted[mid]);
2122                         if (!F_IS_ACTIVE(flist->sorted[mid_up])) {
2123                                 do {
2124                                     mid_up += F_DEPTH(flist->sorted[mid_up]);
2125                                 } while (!F_IS_ACTIVE(flist->sorted[mid_up]));
2126                                 F_DEPTH(flist->sorted[mid]) = mid_up - mid;
2127                         }
2128                         if (mid_up > high) {
2129                                 /* If there's nothing left above us, set high to
2130                                  * a non-empty entry below us and continue. */
2131                                 high = mid - (int)flist->sorted[mid]->len32;
2132                                 if (!F_IS_ACTIVE(flist->sorted[high])) {
2133                                         do {
2134                                             high -= (int)flist->sorted[high]->len32;
2135                                         } while (!F_IS_ACTIVE(flist->sorted[high]));
2136                                         flist->sorted[mid]->len32 = mid - high;
2137                                 }
2138                                 continue;
2139                         }
2140                 }
2141                 diff = f_name_cmp(flist->sorted[mid_up], f);
2142                 if (diff == 0) {
2143                         if (protocol_version < 29
2144                             && S_ISDIR(flist->sorted[mid_up]->mode)
2145                             != S_ISDIR(f->mode))
2146                                 return -1;
2147                         return mid_up;
2148                 }
2149                 if (diff < 0)
2150                         low = mid_up + 1;
2151                 else
2152                         high = mid - 1;
2153         }
2154         return -1;
2155 }
2156
2157 /*
2158  * Free up any resources a file_struct has allocated
2159  * and clear the file.
2160  */
2161 void clear_file(struct file_struct *file)
2162 {
2163         /* The +1 zeros out the first char of the basename. */
2164         memset(file, 0, FILE_STRUCT_LEN + 1);
2165         /* In an empty entry, F_DEPTH() is an offset to the next non-empty
2166          * entry.  Likewise for len32 in the opposite direction.  We assume
2167          * that we're alone for now since flist_find() will adjust the counts
2168          * it runs into that aren't up-to-date. */
2169         file->len32 = F_DEPTH(file) = 1;
2170 }
2171
2172 /* Allocate a new file list. */
2173 struct file_list *flist_new(int flags, char *msg)
2174 {
2175         struct file_list *flist;
2176
2177         flist = new(struct file_list);
2178         if (!flist)
2179                 out_of_memory(msg);
2180
2181         memset(flist, 0, sizeof flist[0]);
2182
2183         if (flags & FLIST_TEMP) {
2184                 if (!(flist->file_pool = pool_create(SMALL_EXTENT, 0,
2185                                                 out_of_memory, POOL_INTERN)))
2186                         out_of_memory(msg);
2187         } else {
2188                 /* This is a doubly linked list with prev looping back to
2189                  * the end of the list, but the last next pointer is NULL. */
2190                 if (!first_flist) {
2191                         flist->file_pool = pool_create(NORMAL_EXTENT, 0,
2192                                                 out_of_memory, POOL_INTERN);
2193                         if (!flist->file_pool)
2194                                 out_of_memory(msg);
2195
2196                         first_flist = cur_flist = flist->prev = flist;
2197                 } else {
2198                         flist->file_pool = first_flist->file_pool;
2199
2200                         flist->ndx_start = first_flist->prev->ndx_end + 2;
2201
2202                         flist->prev = first_flist->prev;
2203                         flist->prev->next = first_flist->prev = flist;
2204                 }
2205                 flist->pool_boundary = pool_boundary(flist->file_pool, 0);
2206                 flist_cnt++;
2207         }
2208
2209         return flist;
2210 }
2211
2212 /* Free up all elements in a flist. */
2213 void flist_free(struct file_list *flist)
2214 {
2215         if (!flist->prev) {
2216                 /* Was FLIST_TEMP dir-list. */
2217         } else if (flist == flist->prev) {
2218                 first_flist = cur_flist = NULL;
2219                 file_total = 0;
2220                 flist_cnt = 0;
2221         } else {
2222                 if (flist == cur_flist)
2223                         cur_flist = flist->next;
2224                 if (flist == first_flist)
2225                         first_flist = first_flist->next;
2226                 else {
2227                         flist->prev->next = flist->next;
2228                         if (!flist->next)
2229                                 flist->next = first_flist;
2230                 }
2231                 flist->next->prev = flist->prev;
2232                 file_total -= flist->used;
2233                 flist_cnt--;
2234         }
2235
2236         if (!flist->prev || !flist_cnt)
2237                 pool_destroy(flist->file_pool);
2238         else
2239                 pool_free_old(flist->file_pool, flist->pool_boundary);
2240
2241         if (flist->sorted && flist->sorted != flist->files)
2242                 free(flist->sorted);
2243         free(flist->files);
2244         free(flist);
2245 }
2246
2247 /* This routine ensures we don't have any duplicate names in our file list.
2248  * duplicate names can cause corruption because of the pipelining. */
2249 static void clean_flist(struct file_list *flist, int strip_root)
2250 {
2251         char fbuf[MAXPATHLEN];
2252         int i, prev_i;
2253
2254         if (!flist)
2255                 return;
2256         if (flist->used == 0) {
2257                 flist->high = -1;
2258                 flist->low = 0;
2259                 return;
2260         }
2261
2262         fsort(flist->sorted, flist->used);
2263
2264         if (!am_sender || inc_recurse) {
2265                 for (i = prev_i = 0; i < flist->used; i++) {
2266                         if (F_IS_ACTIVE(flist->sorted[i])) {
2267                                 prev_i = i;
2268                                 break;
2269                         }
2270                 }
2271                 flist->low = prev_i;
2272         } else {
2273                 i = prev_i = flist->used - 1;
2274                 flist->low = 0;
2275         }
2276
2277         while (++i < flist->used) {
2278                 int j;
2279                 struct file_struct *file = flist->sorted[i];
2280
2281                 if (!F_IS_ACTIVE(file))
2282                         continue;
2283                 if (f_name_cmp(file, flist->sorted[prev_i]) == 0)
2284                         j = prev_i;
2285                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
2286                         int save_mode = file->mode;
2287                         /* Make sure that this directory doesn't duplicate a
2288                          * non-directory earlier in the list. */
2289                         flist->high = prev_i;
2290                         file->mode = S_IFREG;
2291                         j = flist_find(flist, file);
2292                         file->mode = save_mode;
2293                 } else
2294                         j = -1;
2295                 if (j >= 0) {
2296                         int keep, drop;
2297                         /* If one is a dir and the other is not, we want to
2298                          * keep the dir because it might have contents in the
2299                          * list. */
2300                         if (S_ISDIR(file->mode)) {
2301                                 struct file_struct *fp = flist->sorted[j];
2302                                 if (!S_ISDIR(fp->mode))
2303                                         keep = i, drop = j;
2304                                 else
2305                                         keep = j, drop = i;
2306                         } else
2307                                 keep = j, drop = i;
2308
2309                         if (am_sender)
2310                                 flist->sorted[drop]->flags |= FLAG_DUPLICATE;
2311                         else {
2312                                 if (verbose > 1) {
2313                                         rprintf(FINFO,
2314                                             "removing duplicate name %s from file list (%d)\n",
2315                                             f_name(file, fbuf), drop + flist->ndx_start);
2316                                 }
2317                                 /* Make sure we don't lose track of a user-specified
2318                                  * top directory. */
2319                                 flist->sorted[keep]->flags |= flist->sorted[drop]->flags
2320                                                            & (FLAG_TOP_DIR|FLAG_XFER_DIR);
2321
2322                                 clear_file(flist->sorted[drop]);
2323                         }
2324
2325                         if (keep == i) {
2326                                 if (flist->low == drop) {
2327                                         for (j = drop + 1;
2328                                              j < i && !F_IS_ACTIVE(flist->sorted[j]);
2329                                              j++) {}
2330                                         flist->low = j;
2331                                 }
2332                                 prev_i = i;
2333                         }
2334                 } else
2335                         prev_i = i;
2336         }
2337         flist->high = prev_i;
2338
2339         if (strip_root) {
2340                 /* We need to strip off the leading slashes for relative
2341                  * paths, but this must be done _after_ the sorting phase. */
2342                 for (i = flist->low; i <= flist->high; i++) {
2343                         struct file_struct *file = flist->sorted[i];
2344
2345                         if (!file->dirname)
2346                                 continue;
2347                         while (*file->dirname == '/')
2348                                 file->dirname++;
2349                         if (!*file->dirname)
2350                                 file->dirname = NULL;
2351                 }
2352         }
2353
2354         if (prune_empty_dirs && !am_sender) {
2355                 int j, prev_depth = 0;
2356
2357                 prev_i = 0; /* It's OK that this isn't really true. */
2358
2359                 for (i = flist->low; i <= flist->high; i++) {
2360                         struct file_struct *fp, *file = flist->sorted[i];
2361
2362                         /* This temporarily abuses the F_DEPTH() value for a
2363                          * directory that is in a chain that might get pruned.
2364                          * We restore the old value if it gets a reprieve. */
2365                         if (S_ISDIR(file->mode) && F_DEPTH(file)) {
2366                                 /* Dump empty dirs when coming back down. */
2367                                 for (j = prev_depth; j >= F_DEPTH(file); j--) {
2368                                         fp = flist->sorted[prev_i];
2369                                         if (F_DEPTH(fp) >= 0)
2370                                                 break;
2371                                         prev_i = -F_DEPTH(fp)-1;
2372                                         clear_file(fp);
2373                                 }
2374                                 prev_depth = F_DEPTH(file);
2375                                 if (is_excluded(f_name(file, fbuf), 1,
2376                                                        ALL_FILTERS)) {
2377                                         /* Keep dirs through this dir. */
2378                                         for (j = prev_depth-1; ; j--) {
2379                                                 fp = flist->sorted[prev_i];
2380                                                 if (F_DEPTH(fp) >= 0)
2381                                                         break;
2382                                                 prev_i = -F_DEPTH(fp)-1;
2383                                                 F_DEPTH(fp) = j;
2384                                         }
2385                                 } else
2386                                         F_DEPTH(file) = -prev_i-1;
2387                                 prev_i = i;
2388                         } else {
2389                                 /* Keep dirs through this non-dir. */
2390                                 for (j = prev_depth; ; j--) {
2391                                         fp = flist->sorted[prev_i];
2392                                         if (F_DEPTH(fp) >= 0)
2393                                                 break;
2394                                         prev_i = -F_DEPTH(fp)-1;
2395                                         F_DEPTH(fp) = j;
2396                                 }
2397                         }
2398                 }
2399                 /* Dump all remaining empty dirs. */
2400                 while (1) {
2401                         struct file_struct *fp = flist->sorted[prev_i];
2402                         if (F_DEPTH(fp) >= 0)
2403                                 break;
2404                         prev_i = -F_DEPTH(fp)-1;
2405                         clear_file(fp);
2406                 }
2407
2408                 for (i = flist->low; i <= flist->high; i++) {
2409                         if (F_IS_ACTIVE(flist->sorted[i]))
2410                                 break;
2411                 }
2412                 flist->low = i;
2413                 for (i = flist->high; i >= flist->low; i--) {
2414                         if (F_IS_ACTIVE(flist->sorted[i]))
2415                                 break;
2416                 }
2417                 flist->high = i;
2418         }
2419 }
2420
2421 static void output_flist(struct file_list *flist)
2422 {
2423         char uidbuf[16], gidbuf[16], depthbuf[16];
2424         struct file_struct *file;
2425         const char *root, *dir, *slash, *name, *trail;
2426         const char *who = who_am_i();
2427         int i;
2428
2429         rprintf(FINFO, "[%s] flist start=%d, end=%d, used=%d, low=%d, high=%d\n",
2430                 who, flist->ndx_start, flist->ndx_end, flist->used, flist->low, flist->high);
2431         for (i = 0; i < flist->used; i++) {
2432                 file = flist->sorted[i];
2433                 if ((am_root || am_sender) && uid_ndx) {
2434                         snprintf(uidbuf, sizeof uidbuf, " uid=%u",
2435                                  F_OWNER(file));
2436                 } else
2437                         *uidbuf = '\0';
2438                 if (gid_ndx) {
2439                         static char parens[] = "(\0)\0\0\0";
2440                         char *pp = parens + (file->flags & FLAG_SKIP_GROUP ? 0 : 3);
2441                         snprintf(gidbuf, sizeof gidbuf, " gid=%s%u%s",
2442                                  pp, F_GROUP(file), pp + 2);
2443                 } else
2444                         *gidbuf = '\0';
2445                 if (!am_sender)
2446                         snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file));
2447                 if (F_IS_ACTIVE(file)) {
2448                         root = am_sender ? NS(F_PATHNAME(file)) : depthbuf;
2449                         if ((dir = file->dirname) == NULL)
2450                                 dir = slash = "";
2451                         else
2452                                 slash = "/";
2453                         name = file->basename;
2454                         trail = S_ISDIR(file->mode) ? "/" : "";
2455                 } else
2456                         root = dir = slash = name = trail = "";
2457                 rprintf(FINFO,
2458                         "[%s] i=%d %s %s%s%s%s mode=0%o len=%.0f%s%s flags=%x\n",
2459                         who, i + flist->ndx_start,
2460                         root, dir, slash, name, trail,
2461                         (int)file->mode, (double)F_LENGTH(file),
2462                         uidbuf, gidbuf, file->flags);
2463         }
2464 }
2465
2466 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
2467 enum fnc_type { t_PATH, t_ITEM };
2468
2469 static int found_prefix;
2470
2471 /* Compare the names of two file_struct entities, similar to how strcmp()
2472  * would do if it were operating on the joined strings.
2473  *
2474  * Some differences beginning with protocol_version 29: (1) directory names
2475  * are compared with an assumed trailing slash so that they compare in a
2476  * way that would cause them to sort immediately prior to any content they
2477  * may have; (2) a directory of any name compares after a non-directory of
2478  * any name at the same depth; (3) a directory with name "." compares prior
2479  * to anything else.  These changes mean that a directory and a non-dir
2480  * with the same name will not compare as equal (protocol_version >= 29).
2481  *
2482  * The dirname component can be an empty string, but the basename component
2483  * cannot (and never is in the current codebase).  The basename component
2484  * may be NULL (for a removed item), in which case it is considered to be
2485  * after any existing item. */
2486 int f_name_cmp(const struct file_struct *f1, const struct file_struct *f2)
2487 {
2488         int dif;
2489         const uchar *c1, *c2;
2490         enum fnc_state state1, state2;
2491         enum fnc_type type1, type2;
2492         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
2493
2494         if (!f1 || !F_IS_ACTIVE(f1)) {
2495                 if (!f2 || !F_IS_ACTIVE(f2))
2496                         return 0;
2497                 return -1;
2498         }
2499         if (!f2 || !F_IS_ACTIVE(f2))
2500                 return 1;
2501
2502         c1 = (uchar*)f1->dirname;
2503         c2 = (uchar*)f2->dirname;
2504         if (c1 == c2)
2505                 c1 = c2 = NULL;
2506         if (!c1) {
2507                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2508                 c1 = (const uchar*)f1->basename;
2509                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2510                         type1 = t_ITEM;
2511                         state1 = s_TRAILING;
2512                         c1 = (uchar*)"";
2513                 } else
2514                         state1 = s_BASE;
2515         } else {
2516                 type1 = t_path;
2517                 state1 = s_DIR;
2518         }
2519         if (!c2) {
2520                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2521                 c2 = (const uchar*)f2->basename;
2522                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2523                         type2 = t_ITEM;
2524                         state2 = s_TRAILING;
2525                         c2 = (uchar*)"";
2526                 } else
2527                         state2 = s_BASE;
2528         } else {
2529                 type2 = t_path;
2530                 state2 = s_DIR;
2531         }
2532
2533         if (type1 != type2)
2534                 return type1 == t_PATH ? 1 : -1;
2535
2536         do {
2537                 if (!*c1) {
2538                         switch (state1) {
2539                         case s_DIR:
2540                                 state1 = s_SLASH;
2541                                 c1 = (uchar*)"/";
2542                                 break;
2543                         case s_SLASH:
2544                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2545                                 c1 = (const uchar*)f1->basename;
2546                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2547                                         type1 = t_ITEM;
2548                                         state1 = s_TRAILING;
2549                                         c1 = (uchar*)"";
2550                                 } else
2551                                         state1 = s_BASE;
2552                                 break;
2553                         case s_BASE:
2554                                 state1 = s_TRAILING;
2555                                 if (type1 == t_PATH) {
2556                                         c1 = (uchar*)"/";
2557                                         break;
2558                                 }
2559                                 /* FALL THROUGH */
2560                         case s_TRAILING:
2561                                 type1 = t_ITEM;
2562                                 break;
2563                         }
2564                         if (*c2 && type1 != type2)
2565                                 return type1 == t_PATH ? 1 : -1;
2566                 }
2567                 if (!*c2) {
2568                         switch (state2) {
2569                         case s_DIR:
2570                                 state2 = s_SLASH;
2571                                 c2 = (uchar*)"/";
2572                                 break;
2573                         case s_SLASH:
2574                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2575                                 c2 = (const uchar*)f2->basename;
2576                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2577                                         type2 = t_ITEM;
2578                                         state2 = s_TRAILING;
2579                                         c2 = (uchar*)"";
2580                                 } else
2581                                         state2 = s_BASE;
2582                                 break;
2583                         case s_BASE:
2584                                 state2 = s_TRAILING;
2585                                 if (type2 == t_PATH) {
2586                                         c2 = (uchar*)"/";
2587                                         break;
2588                                 }
2589                                 /* FALL THROUGH */
2590                         case s_TRAILING:
2591                                 found_prefix = 1;
2592                                 if (!*c1)
2593                                         return 0;
2594                                 type2 = t_ITEM;
2595                                 break;
2596                         }
2597                         if (type1 != type2)
2598                                 return type1 == t_PATH ? 1 : -1;
2599                 }
2600         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
2601
2602         return dif;
2603 }
2604
2605 /* Returns 1 if f1's filename has all of f2's filename as a prefix.  This does
2606  * not match if f2's basename is not an exact match of a path element in f1.
2607  * E.g. /path/foo is not a prefix of /path/foobar/baz, but /path/foobar is. */
2608 int f_name_has_prefix(const struct file_struct *f1, const struct file_struct *f2)
2609 {
2610         found_prefix = 0;
2611         f_name_cmp(f1, f2);
2612         return found_prefix;
2613 }
2614
2615 char *f_name_buf(void)
2616 {
2617         static char names[5][MAXPATHLEN];
2618         static unsigned int n;
2619
2620         n = (n + 1) % (sizeof names / sizeof names[0]);
2621
2622         return names[n];
2623 }
2624
2625 /* Return a copy of the full filename of a flist entry, using the indicated
2626  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
2627  * done because we checked the size when creating the file_struct entry.
2628  */
2629 char *f_name(const struct file_struct *f, char *fbuf)
2630 {
2631         if (!f || !F_IS_ACTIVE(f))
2632                 return NULL;
2633
2634         if (!fbuf)
2635                 fbuf = f_name_buf();
2636
2637         if (f->dirname) {
2638                 int len = strlen(f->dirname);
2639                 memcpy(fbuf, f->dirname, len);
2640                 fbuf[len] = '/';
2641                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
2642         } else
2643                 strlcpy(fbuf, f->basename, MAXPATHLEN);
2644
2645         return fbuf;
2646 }
2647
2648 /* Do a non-recursive scan of the named directory, possibly ignoring all
2649  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
2650  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
2651  * buffer (the functions we call will append names onto the end, but the old
2652  * dir value will be restored on exit). */
2653 struct file_list *get_dirlist(char *dirname, int dlen, int ignore_filter_rules)
2654 {
2655         struct file_list *dirlist;
2656         char dirbuf[MAXPATHLEN];
2657         int save_recurse = recurse;
2658         int save_xfer_dirs = xfer_dirs;
2659         int save_prune_empty_dirs = prune_empty_dirs;
2660
2661         if (dlen < 0) {
2662                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
2663                 if (dlen >= MAXPATHLEN)
2664                         return NULL;
2665                 dirname = dirbuf;
2666         }
2667
2668         dirlist = flist_new(FLIST_TEMP, "get_dirlist");
2669
2670         recurse = 0;
2671         xfer_dirs = 1;
2672         send_directory(ignore_filter_rules ? -2 : -1, dirlist, dirname, dlen, 0);
2673         xfer_dirs = save_xfer_dirs;
2674         recurse = save_recurse;
2675         if (do_progress)
2676                 flist_count_offset += dirlist->used;
2677
2678         prune_empty_dirs = 0;
2679         dirlist->sorted = dirlist->files;
2680         clean_flist(dirlist, 0);
2681         prune_empty_dirs = save_prune_empty_dirs;
2682
2683         if (verbose > 3)
2684                 output_flist(dirlist);
2685
2686         return dirlist;
2687 }