flist.c

   1 /*
   2    Copyright (C) Andrew Tridgell 1996
   3    Copyright (C) Paul Mackerras 1996
   4    Copyright (C) 2001, 2002 by Martin Pool <mbp@samba.org>
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19 */
  20
  21 /** @file flist.c
  22  * Generate and receive file lists
  23  *
  24  * @sa http://lists.samba.org/pipermail/rsync/2000-June/002351.html
  25  *
  26  **/
  27
  28 #include "rsync.h"
  29
  30 extern struct stats stats;
  31
  32 extern int verbose;
  33 extern int do_progress;
  34 extern int am_root;
  35 extern int am_server;
  36 extern int am_daemon;
  37 extern int am_sender;
  38 extern int delete_during;
  39 extern int always_checksum;
  40 extern int module_id;
  41 extern int ignore_errors;
  42 extern int numeric_ids;
  43
  44 extern int recurse;
  45 extern int xfer_dirs;
  46 extern char curr_dir[MAXPATHLEN];
  47 extern unsigned int curr_dir_len;
  48 extern char *backup_dir;
  49 extern char *backup_suffix;
  50 extern int filesfrom_fd;
  51
  52 extern int one_file_system;
  53 extern int keep_dirlinks;
  54 extern int preserve_links;
  55 extern int preserve_hard_links;
  56 extern int preserve_perms;
  57 extern int preserve_devices;
  58 extern int preserve_uid;
  59 extern int preserve_gid;
  60 extern int relative_paths;
  61 extern int implied_dirs;
  62 extern int make_backups;
  63 extern int backup_suffix_len;
  64 extern int copy_links;
  65 extern int copy_unsafe_links;
  66 extern int protocol_version;
  67 extern int sanitize_paths;
  68 extern int delete_excluded;
  69 extern int max_delete;
  70 extern int orig_umask;
  71 extern int list_only;
  72
  73 extern struct exclude_list_struct exclude_list;
  74 extern struct exclude_list_struct server_exclude_list;
  75
  76 int io_error;
  77
  78 static char empty_sum[MD4_SUM_LENGTH];
  79 static unsigned int file_struct_len;
  80 static struct file_list *received_flist;
  81
  82 static void clean_flist(struct file_list *flist, int strip_root, int no_dups);
  83 static void output_flist(struct file_list *flist, const char *whose_list);
  84
  85 void init_flist(void)
  86 {
  87         struct file_struct f;
  88
  89         /* Figure out how big the file_struct is without trailing padding */
  90         file_struct_len = offsetof(struct file_struct, flags) + sizeof f.flags;
  91 }
  92
  93
  94 static int show_filelist_p(void)
  95 {
  96         return verbose && xfer_dirs && !am_server;
  97 }
  98
  99 static void start_filelist_progress(char *kind)
 100 {
 101         rprintf(FINFO, "%s ... ", kind);
 102         if (verbose > 1 || do_progress)
 103                 rprintf(FINFO, "\n");
 104         rflush(FINFO);
 105 }
 106
 107
 108 static void emit_filelist_progress(const struct file_list *flist)
 109 {
 110         rprintf(FINFO, " %d files...\r", flist->count);
 111 }
 112
 113
 114 static void maybe_emit_filelist_progress(const struct file_list *flist)
 115 {
 116         if (do_progress && show_filelist_p() && (flist->count % 100) == 0)
 117                 emit_filelist_progress(flist);
 118 }
 119
 120
 121 static void finish_filelist_progress(const struct file_list *flist)
 122 {
 123         if (do_progress) {
 124                 /* This overwrites the progress line */
 125                 rprintf(FINFO, "%d file%sto consider\n",
 126                         flist->count, flist->count == 1 ? " " : "s ");
 127         } else
 128                 rprintf(FINFO, "done\n");
 129 }
 130
 131 void show_flist_stats(void)
 132 {
 133         /* Nothing yet */
 134 }
 135
 136
 137 static void list_file_entry(struct file_struct *f)
 138 {
 139         char perms[11];
 140
 141         if (!f->basename) {
 142                 /* this can happen if duplicate names were removed */
 143                 return;
 144         }
 145
 146         permstring(perms, f->mode);
 147
 148 #if SUPPORT_LINKS
 149         if (preserve_links && S_ISLNK(f->mode)) {
 150                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
 151                         perms,
 152                         (double)f->length, timestring(f->modtime),
 153                         f_name(f), f->u.link);
 154         } else
 155 #endif
 156         {
 157                 rprintf(FINFO, "%s %11.0f %s %s\n",
 158                         perms,
 159                         (double)f->length, timestring(f->modtime),
 160                         f_name(f));
 161         }
 162 }
 163
 164
 165 /**
 166  * Stat either a symlink or its referent, depending on the settings of
 167  * copy_links, copy_unsafe_links, etc.
 168  *
 169  * @retval -1 on error
 170  *
 171  * @retval 0 for success
 172  *
 173  * @post If @p path is a symlink, then @p linkbuf (of size @c
 174  * MAXPATHLEN) contains the symlink target.
 175  *
 176  * @post @p buffer contains information about the link or the
 177  * referrent as appropriate, if they exist.
 178  **/
 179 static int readlink_stat(const char *path, STRUCT_STAT *buffer, char *linkbuf)
 180 {
 181 #if SUPPORT_LINKS
 182         if (copy_links)
 183                 return do_stat(path, buffer);
 184         if (link_stat(path, buffer, 0) < 0)
 185                 return -1;
 186         if (S_ISLNK(buffer->st_mode)) {
 187                 int l = readlink((char *)path, linkbuf, MAXPATHLEN - 1);
 188                 if (l == -1)
 189                         return -1;
 190                 linkbuf[l] = 0;
 191                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 192                         if (verbose > 1) {
 193                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 194                                         path, linkbuf);
 195                         }
 196                         return do_stat(path, buffer);
 197                 }
 198         }
 199         return 0;
 200 #else
 201         return do_stat(path, buffer);
 202 #endif
 203 }
 204
 205 int link_stat(const char *path, STRUCT_STAT *buffer, int follow_dirlinks)
 206 {
 207 #if SUPPORT_LINKS
 208         if (copy_links)
 209                 return do_stat(path, buffer);
 210         if (do_lstat(path, buffer) < 0)
 211                 return -1;
 212         if (follow_dirlinks && S_ISLNK(buffer->st_mode)) {
 213                 STRUCT_STAT st;
 214                 if (do_stat(path, &st) == 0 && S_ISDIR(st.st_mode))
 215                         *buffer = st;
 216         }
 217         return 0;
 218 #else
 219         return do_stat(path, buffer);
 220 #endif
 221 }
 222
 223 /*
 224  * This function is used to check if a file should be included/excluded
 225  * from the list of files based on its name and type etc.  The value of
 226  * exclude_level is set to either SERVER_EXCLUDES or ALL_EXCLUDES.
 227  */
 228 static int check_exclude_file(char *fname, int is_dir, int exclude_level)
 229 {
 230 #if 0 /* This currently never happens, so avoid a useless compare. */
 231         if (exclude_level == NO_EXCLUDES)
 232                 return 0;
 233 #endif
 234         if (fname) {
 235                 /* never exclude '.', even if somebody does --exclude '*' */
 236                 if (fname[0] == '.' && !fname[1])
 237                         return 0;
 238                 /* Handle the -R version of the '.' dir. */
 239                 if (fname[0] == '/') {
 240                         int len = strlen(fname);
 241                         if (fname[len-1] == '.' && fname[len-2] == '/')
 242                                 return 0;
 243                 }
 244         }
 245         if (server_exclude_list.head
 246             && check_exclude(&server_exclude_list, fname, is_dir) < 0)
 247                 return 1;
 248         if (exclude_level != ALL_EXCLUDES)
 249                 return 0;
 250         if (exclude_list.head
 251             && check_exclude(&exclude_list, fname, is_dir) < 0)
 252                 return 1;
 253         return 0;
 254 }
 255
 256 /* used by the one_file_system code */
 257 static dev_t filesystem_dev;
 258
 259 static void set_filesystem(char *fname)
 260 {
 261         STRUCT_STAT st;
 262         if (do_stat(fname, &st) != 0)
 263                 return;
 264         filesystem_dev = st.st_dev;
 265 }
 266
 267
 268 static int to_wire_mode(mode_t mode)
 269 {
 270 #if SUPPORT_LINKS
 271         if (S_ISLNK(mode) && (_S_IFLNK != 0120000))
 272                 return (mode & ~(_S_IFMT)) | 0120000;
 273 #endif
 274         return (int)mode;
 275 }
 276
 277 static mode_t from_wire_mode(int mode)
 278 {
 279         if ((mode & (_S_IFMT)) == 0120000 && (_S_IFLNK != 0120000))
 280                 return (mode & ~(_S_IFMT)) | _S_IFLNK;
 281         return (mode_t)mode;
 282 }
 283
 284
 285 static void send_directory(int f, struct file_list *flist, char *dir);
 286
 287 static char *flist_dir;
 288 static int flist_dir_len;
 289
 290
 291 /**
 292  * Make sure @p flist is big enough to hold at least @p flist->count
 293  * entries.
 294  **/
 295 void flist_expand(struct file_list *flist)
 296 {
 297         struct file_struct **new_ptr;
 298
 299         if (flist->count < flist->malloced)
 300                 return;
 301
 302         if (flist->malloced < FLIST_START)
 303                 flist->malloced = FLIST_START;
 304         else if (flist->malloced >= FLIST_LINEAR)
 305                 flist->malloced += FLIST_LINEAR;
 306         else
 307                 flist->malloced *= 2;
 308
 309         /*
 310          * In case count jumped or we are starting the list
 311          * with a known size just set it.
 312          */
 313         if (flist->malloced < flist->count)
 314                 flist->malloced = flist->count;
 315
 316         new_ptr = realloc_array(flist->files, struct file_struct *,
 317                                 flist->malloced);
 318
 319         if (verbose >= 2 && flist->malloced != FLIST_START) {
 320                 rprintf(FINFO, "[%s] expand file_list to %.0f bytes, did%s move\n",
 321                     who_am_i(),
 322                     (double)sizeof flist->files[0] * flist->malloced,
 323                     (new_ptr == flist->files) ? " not" : "");
 324         }
 325
 326         flist->files = new_ptr;
 327
 328         if (!flist->files)
 329                 out_of_memory("flist_expand");
 330 }
 331
 332 void send_file_entry(struct file_struct *file, int f, unsigned short base_flags)
 333 {
 334         unsigned short flags;
 335         static time_t modtime;
 336         static mode_t mode;
 337         static int64 dev;
 338         static dev_t rdev;
 339         static uint32 rdev_major;
 340         static uid_t uid;
 341         static gid_t gid;
 342         static char lastname[MAXPATHLEN];
 343         char fname[MAXPATHLEN];
 344         int l1, l2;
 345
 346         if (f == -1)
 347                 return;
 348
 349         if (!file) {
 350                 write_byte(f, 0);
 351                 modtime = 0, mode = 0;
 352                 dev = 0, rdev = makedev(0, 0);
 353                 rdev_major = 0;
 354                 uid = 0, gid = 0;
 355                 *lastname = '\0';
 356                 return;
 357         }
 358
 359         io_write_phase = "send_file_entry";
 360
 361         f_name_to(file, fname);
 362
 363         flags = base_flags;
 364
 365         if (file->mode == mode)
 366                 flags |= XMIT_SAME_MODE;
 367         else
 368                 mode = file->mode;
 369         if (preserve_devices) {
 370                 if (protocol_version < 28) {
 371                         if (IS_DEVICE(mode)) {
 372                                 if (file->u.rdev == rdev)
 373                                         flags |= XMIT_SAME_RDEV_pre28;
 374                                 else
 375                                         rdev = file->u.rdev;
 376                         } else
 377                                 rdev = makedev(0, 0);
 378                 } else if (IS_DEVICE(mode)) {
 379                         rdev = file->u.rdev;
 380                         if ((uint32)major(rdev) == rdev_major)
 381                                 flags |= XMIT_SAME_RDEV_MAJOR;
 382                         else
 383                                 rdev_major = major(rdev);
 384                         if ((uint32)minor(rdev) <= 0xFFu)
 385                                 flags |= XMIT_RDEV_MINOR_IS_SMALL;
 386                 }
 387         }
 388         if (file->uid == uid)
 389                 flags |= XMIT_SAME_UID;
 390         else
 391                 uid = file->uid;
 392         if (file->gid == gid)
 393                 flags |= XMIT_SAME_GID;
 394         else
 395                 gid = file->gid;
 396         if (file->modtime == modtime)
 397                 flags |= XMIT_SAME_TIME;
 398         else
 399                 modtime = file->modtime;
 400
 401 #if SUPPORT_HARD_LINKS
 402         if (file->link_u.idev) {
 403                 if (file->F_DEV == dev) {
 404                         if (protocol_version >= 28)
 405                                 flags |= XMIT_SAME_DEV;
 406                 } else
 407                         dev = file->F_DEV;
 408                 flags |= XMIT_HAS_IDEV_DATA;
 409         }
 410 #endif
 411
 412         for (l1 = 0;
 413             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 414             l1++) {}
 415         l2 = strlen(fname+l1);
 416
 417         if (l1 > 0)
 418                 flags |= XMIT_SAME_NAME;
 419         if (l2 > 255)
 420                 flags |= XMIT_LONG_NAME;
 421
 422         /* We must make sure we don't send a zero flag byte or the
 423          * other end will terminate the flist transfer.  Note that
 424          * the use of XMIT_DEL_START on a non-dir has no meaning, so
 425          * it's harmless way to add a bit to the first flag byte. */
 426         if (protocol_version >= 28) {
 427                 if (!flags && !S_ISDIR(mode))
 428                         flags |= XMIT_DEL_START;
 429                 if ((flags & 0xFF00) || !flags) {
 430                         flags |= XMIT_EXTENDED_FLAGS;
 431                         write_byte(f, flags);
 432                         write_byte(f, flags >> 8);
 433                 } else
 434                         write_byte(f, flags);
 435         } else {
 436                 if (!(flags & 0xFF) && !S_ISDIR(mode))
 437                         flags |= XMIT_DEL_START;
 438                 if (!(flags & 0xFF))
 439                         flags |= XMIT_LONG_NAME;
 440                 write_byte(f, flags);
 441         }
 442         if (flags & XMIT_SAME_NAME)
 443                 write_byte(f, l1);
 444         if (flags & XMIT_LONG_NAME)
 445                 write_int(f, l2);
 446         else
 447                 write_byte(f, l2);
 448         write_buf(f, fname + l1, l2);
 449
 450         write_longint(f, file->length);
 451         if (!(flags & XMIT_SAME_TIME))
 452                 write_int(f, modtime);
 453         if (!(flags & XMIT_SAME_MODE))
 454                 write_int(f, to_wire_mode(mode));
 455         if (preserve_uid && !(flags & XMIT_SAME_UID)) {
 456                 if (!numeric_ids)
 457                         add_uid(uid);
 458                 write_int(f, uid);
 459         }
 460         if (preserve_gid && !(flags & XMIT_SAME_GID)) {
 461                 if (!numeric_ids)
 462                         add_gid(gid);
 463                 write_int(f, gid);
 464         }
 465         if (preserve_devices && IS_DEVICE(mode)) {
 466                 if (protocol_version < 28) {
 467                         if (!(flags & XMIT_SAME_RDEV_pre28))
 468                                 write_int(f, (int)rdev);
 469                 } else {
 470                         if (!(flags & XMIT_SAME_RDEV_MAJOR))
 471                                 write_int(f, major(rdev));
 472                         if (flags & XMIT_RDEV_MINOR_IS_SMALL)
 473                                 write_byte(f, minor(rdev));
 474                         else
 475                                 write_int(f, minor(rdev));
 476                 }
 477         }
 478
 479 #if SUPPORT_LINKS
 480         if (preserve_links && S_ISLNK(mode)) {
 481                 int len = strlen(file->u.link);
 482                 write_int(f, len);
 483                 write_buf(f, file->u.link, len);
 484         }
 485 #endif
 486
 487 #if SUPPORT_HARD_LINKS
 488         if (flags & XMIT_HAS_IDEV_DATA) {
 489                 if (protocol_version < 26) {
 490                         /* 32-bit dev_t and ino_t */
 491                         write_int(f, dev);
 492                         write_int(f, file->F_INODE);
 493                 } else {
 494                         /* 64-bit dev_t and ino_t */
 495                         if (!(flags & XMIT_SAME_DEV))
 496                                 write_longint(f, dev);
 497                         write_longint(f, file->F_INODE);
 498                 }
 499         }
 500 #endif
 501
 502         if (always_checksum) {
 503                 char *sum;
 504                 if (S_ISREG(mode))
 505                         sum = file->u.sum;
 506                 else if (protocol_version < 28) {
 507                         /* Prior to 28, we sent a useless set of nulls. */
 508                         sum = empty_sum;
 509                 } else
 510                         sum = NULL;
 511                 if (sum) {
 512                         write_buf(f, sum,
 513                             protocol_version < 21 ? 2 : MD4_SUM_LENGTH);
 514                 }
 515         }
 516
 517         strlcpy(lastname, fname, MAXPATHLEN);
 518
 519         io_write_phase = "unknown";
 520 }
 521
 522
 523
 524 void receive_file_entry(struct file_struct **fptr, unsigned short flags,
 525                         struct file_list *flist, int f)
 526 {
 527         static time_t modtime;
 528         static mode_t mode;
 529         static int64 dev;
 530         static dev_t rdev;
 531         static uint32 rdev_major;
 532         static uid_t uid;
 533         static gid_t gid;
 534         static char lastname[MAXPATHLEN], *lastdir;
 535         static int lastdir_depth, lastdir_len = -1;
 536         static unsigned int del_heir_name_len = -1;
 537         static int in_del_hier = 0;
 538         char thisname[MAXPATHLEN];
 539         unsigned int l1 = 0, l2 = 0;
 540         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
 541         OFF_T file_length;
 542         char *basename, *dirname, *bp;
 543         struct file_struct *file;
 544
 545         if (!fptr) {
 546                 modtime = 0, mode = 0;
 547                 dev = 0, rdev = makedev(0, 0);
 548                 rdev_major = 0;
 549                 uid = 0, gid = 0;
 550                 *lastname = '\0';
 551                 del_heir_name_len = lastdir_len = -1;
 552                 in_del_hier = 0;
 553                 return;
 554         }
 555
 556         if (flags & XMIT_SAME_NAME)
 557                 l1 = read_byte(f);
 558
 559         if (flags & XMIT_LONG_NAME)
 560                 l2 = read_int(f);
 561         else
 562                 l2 = read_byte(f);
 563
 564         if (l2 >= MAXPATHLEN - l1) {
 565                 rprintf(FERROR,
 566                         "overflow: flags=0x%x l1=%d l2=%d lastname=%s\n",
 567                         flags, l1, l2, lastname);
 568                 overflow("receive_file_entry");
 569         }
 570
 571         strlcpy(thisname, lastname, l1 + 1);
 572         read_sbuf(f, &thisname[l1], l2);
 573         thisname[l1 + l2] = 0;
 574
 575         strlcpy(lastname, thisname, MAXPATHLEN);
 576
 577         clean_fname(thisname, 0);
 578
 579         if (sanitize_paths)
 580                 sanitize_path(thisname, thisname, "", 0);
 581
 582         if ((basename = strrchr(thisname, '/')) != NULL) {
 583                 dirname_len = ++basename - thisname; /* counts future '\0' */
 584                 if (lastdir_len == dirname_len - 1
 585                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
 586                         dirname = lastdir;
 587                         dirname_len = 0; /* indicates no copy is needed */
 588                 } else
 589                         dirname = thisname;
 590         } else {
 591                 basename = thisname;
 592                 dirname = NULL;
 593                 dirname_len = 0;
 594         }
 595         basename_len = strlen(basename) + 1; /* count the '\0' */
 596
 597         file_length = read_longint(f);
 598         if (!(flags & XMIT_SAME_TIME))
 599                 modtime = (time_t)read_int(f);
 600         if (!(flags & XMIT_SAME_MODE))
 601                 mode = from_wire_mode(read_int(f));
 602
 603         if (preserve_uid && !(flags & XMIT_SAME_UID))
 604                 uid = (uid_t)read_int(f);
 605         if (preserve_gid && !(flags & XMIT_SAME_GID))
 606                 gid = (gid_t)read_int(f);
 607
 608         if (preserve_devices) {
 609                 if (protocol_version < 28) {
 610                         if (IS_DEVICE(mode)) {
 611                                 if (!(flags & XMIT_SAME_RDEV_pre28))
 612                                         rdev = (dev_t)read_int(f);
 613                         } else
 614                                 rdev = makedev(0, 0);
 615                 } else if (IS_DEVICE(mode)) {
 616                         uint32 rdev_minor;
 617                         if (!(flags & XMIT_SAME_RDEV_MAJOR))
 618                                 rdev_major = read_int(f);
 619                         if (flags & XMIT_RDEV_MINOR_IS_SMALL)
 620                                 rdev_minor = read_byte(f);
 621                         else
 622                                 rdev_minor = read_int(f);
 623                         rdev = makedev(rdev_major, rdev_minor);
 624                 }
 625         }
 626
 627 #if SUPPORT_LINKS
 628         if (preserve_links && S_ISLNK(mode)) {
 629                 linkname_len = read_int(f) + 1; /* count the '\0' */
 630                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 631                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 632                                 linkname_len - 1);
 633                         overflow("receive_file_entry");
 634                 }
 635         }
 636         else
 637 #endif
 638                 linkname_len = 0;
 639
 640         sum_len = always_checksum && S_ISREG(mode) ? MD4_SUM_LENGTH : 0;
 641
 642         alloc_len = file_struct_len + dirname_len + basename_len
 643                   + linkname_len + sum_len;
 644         bp = pool_alloc(flist->file_pool, alloc_len, "receive_file_entry");
 645
 646         file = *fptr = (struct file_struct *)bp;
 647         memset(bp, 0, file_struct_len);
 648         bp += file_struct_len;
 649
 650         file->flags = 0;
 651         file->modtime = modtime;
 652         file->length = file_length;
 653         file->mode = mode;
 654         file->uid = uid;
 655         file->gid = gid;
 656
 657         if (S_ISDIR(mode)) {
 658                 if (flags & XMIT_DEL_START) {
 659                         in_del_hier = 1;
 660                         del_heir_name_len = l1 + l2;
 661                         file->flags |= FLAG_DEL_START;
 662                 } else if (delete_during && in_del_hier) {
 663                         if (!relative_paths || (l1 >= del_heir_name_len
 664                             && thisname[del_heir_name_len] == '/'))
 665                                 file->flags |= FLAG_DEL_START;
 666                         else
 667                                 in_del_hier = 0;
 668                 }
 669         }
 670
 671         if (dirname_len) {
 672                 file->dirname = lastdir = bp;
 673                 lastdir_len = dirname_len - 1;
 674                 memcpy(bp, dirname, dirname_len - 1);
 675                 bp += dirname_len;
 676                 bp[-1] = '\0';
 677                 if (sanitize_paths)
 678                         lastdir_depth = count_dir_elements(lastdir);
 679         } else if (dirname)
 680                 file->dirname = dirname;
 681
 682         file->basename = bp;
 683         memcpy(bp, basename, basename_len);
 684         bp += basename_len;
 685
 686         if (preserve_devices && IS_DEVICE(mode))
 687                 file->u.rdev = rdev;
 688
 689 #if SUPPORT_LINKS
 690         if (linkname_len) {
 691                 file->u.link = bp;
 692                 read_sbuf(f, bp, linkname_len - 1);
 693                 if (sanitize_paths)
 694                         sanitize_path(bp, bp, "", lastdir_depth);
 695                 bp += linkname_len;
 696         }
 697 #endif
 698
 699 #if SUPPORT_HARD_LINKS
 700         if (preserve_hard_links && protocol_version < 28 && S_ISREG(mode))
 701                 flags |= XMIT_HAS_IDEV_DATA;
 702         if (flags & XMIT_HAS_IDEV_DATA) {
 703                 int64 inode;
 704                 if (protocol_version < 26) {
 705                         dev = read_int(f);
 706                         inode = read_int(f);
 707                 } else {
 708                         if (!(flags & XMIT_SAME_DEV))
 709                                 dev = read_longint(f);
 710                         inode = read_longint(f);
 711                 }
 712                 if (flist->hlink_pool) {
 713                         file->link_u.idev = pool_talloc(flist->hlink_pool,
 714                             struct idev, 1, "inode_table");
 715                         file->F_INODE = inode;
 716                         file->F_DEV = dev;
 717                 }
 718         }
 719 #endif
 720
 721         if (always_checksum) {
 722                 char *sum;
 723                 if (sum_len) {
 724                         file->u.sum = sum = bp;
 725                         /*bp += sum_len;*/
 726                 } else if (protocol_version < 28) {
 727                         /* Prior to 28, we get a useless set of nulls. */
 728                         sum = empty_sum;
 729                 } else
 730                         sum = NULL;
 731                 if (sum) {
 732                         read_buf(f, sum,
 733                             protocol_version < 21 ? 2 : MD4_SUM_LENGTH);
 734                 }
 735         }
 736
 737         if (!preserve_perms) {
 738                 /* set an appropriate set of permissions based on original
 739                  * permissions and umask. This emulates what GNU cp does */
 740                 file->mode &= ~orig_umask;
 741         }
 742 }
 743
 744
 745 /**
 746  * Create a file_struct for a named file by reading its stat()
 747  * information and performing extensive checks against global
 748  * options.
 749  *
 750  * @return the new file, or NULL if there was an error or this file
 751  * should be excluded.
 752  *
 753  * @todo There is a small optimization opportunity here to avoid
 754  * stat()ing the file in some circumstances, which has a certain cost.
 755  * We are called immediately after doing readdir(), and so we may
 756  * already know the d_type of the file.  We could for example avoid
 757  * statting directories if we're not recursing, but this is not a very
 758  * important case.  Some systems may not have d_type.
 759  **/
 760 struct file_struct *make_file(char *fname, struct file_list *flist,
 761                               int exclude_level)
 762 {
 763         static char *lastdir;
 764         static int lastdir_len = -1;
 765         struct file_struct *file;
 766         STRUCT_STAT st;
 767         char sum[SUM_LENGTH];
 768         char thisname[MAXPATHLEN];
 769         char linkname[MAXPATHLEN];
 770         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
 771         char *basename, *dirname, *bp;
 772         unsigned short flags = 0;
 773
 774         if (!flist || !flist->count)    /* Ignore lastdir when invalid. */
 775                 lastdir_len = -1;
 776
 777         if (strlcpy(thisname, fname, sizeof thisname)
 778             >= sizeof thisname - flist_dir_len) {
 779                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
 780                 return NULL;
 781         }
 782         clean_fname(thisname, 0);
 783         if (sanitize_paths)
 784                 sanitize_path(thisname, thisname, "", 0);
 785
 786         memset(sum, 0, SUM_LENGTH);
 787
 788         if (readlink_stat(thisname, &st, linkname) != 0) {
 789                 int save_errno = errno;
 790                 /* See if file is excluded before reporting an error. */
 791                 if (exclude_level != NO_EXCLUDES
 792                     && check_exclude_file(thisname, 0, exclude_level))
 793                         return NULL;
 794                 if (save_errno == ENOENT) {
 795 #if SUPPORT_LINKS
 796                         /* Avoid "vanished" error if symlink points nowhere. */
 797                         if (copy_links && do_lstat(thisname, &st) == 0
 798                             && S_ISLNK(st.st_mode)) {
 799                                 io_error |= IOERR_GENERAL;
 800                                 rprintf(FERROR, "symlink has no referent: %s\n",
 801                                         full_fname(thisname));
 802                         } else
 803 #endif
 804                         {
 805                                 enum logcode c = am_daemon && protocol_version < 28
 806                                     ? FERROR : FINFO;
 807                                 io_error |= IOERR_VANISHED;
 808                                 rprintf(c, "file has vanished: %s\n",
 809                                         full_fname(thisname));
 810                         }
 811                 } else {
 812                         io_error |= IOERR_GENERAL;
 813                         rsyserr(FERROR, save_errno, "readlink %s failed",
 814                                 full_fname(thisname));
 815                 }
 816                 return NULL;
 817         }
 818
 819         /* backup.c calls us with exclude_level set to NO_EXCLUDES. */
 820         if (exclude_level == NO_EXCLUDES)
 821                 goto skip_excludes;
 822
 823         if (S_ISDIR(st.st_mode) && !xfer_dirs) {
 824                 rprintf(FINFO, "skipping directory %s\n", thisname);
 825                 return NULL;
 826         }
 827
 828         /* We only care about directories because we need to avoid recursing
 829          * into a mount-point directory, not to avoid copying a symlinked
 830          * file if -L (or similar) was specified. */
 831         if (one_file_system && st.st_dev != filesystem_dev
 832             && S_ISDIR(st.st_mode))
 833                 flags |= FLAG_MOUNT_POINT;
 834
 835         if (check_exclude_file(thisname, S_ISDIR(st.st_mode) != 0, exclude_level))
 836                 return NULL;
 837
 838         if (lp_ignore_nonreadable(module_id)) {
 839 #if SUPPORT_LINKS
 840                 if (!S_ISLNK(st.st_mode))
 841 #endif
 842                         if (access(thisname, R_OK) != 0)
 843                                 return NULL;
 844         }
 845
 846 skip_excludes:
 847
 848         if (verbose > 2) {
 849                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
 850                         who_am_i(), thisname, exclude_level);
 851         }
 852
 853         if ((basename = strrchr(thisname, '/')) != NULL) {
 854                 dirname_len = ++basename - thisname; /* counts future '\0' */
 855                 if (lastdir_len == dirname_len - 1
 856                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
 857                         dirname = lastdir;
 858                         dirname_len = 0; /* indicates no copy is needed */
 859                 } else
 860                         dirname = thisname;
 861         } else {
 862                 basename = thisname;
 863                 dirname = NULL;
 864                 dirname_len = 0;
 865         }
 866         basename_len = strlen(basename) + 1; /* count the '\0' */
 867
 868 #if SUPPORT_LINKS
 869         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
 870 #else
 871         linkname_len = 0;
 872 #endif
 873
 874         sum_len = always_checksum && S_ISREG(st.st_mode) ? MD4_SUM_LENGTH : 0;
 875
 876         alloc_len = file_struct_len + dirname_len + basename_len
 877             + linkname_len + sum_len;
 878         if (flist) {
 879                 bp = pool_alloc(flist->file_pool, alloc_len,
 880                     "receive_file_entry");
 881         } else {
 882                 if (!(bp = new_array(char, alloc_len)))
 883                         out_of_memory("receive_file_entry");
 884         }
 885
 886         file = (struct file_struct *)bp;
 887         memset(bp, 0, file_struct_len);
 888         bp += file_struct_len;
 889
 890         file->flags = flags;
 891         file->modtime = st.st_mtime;
 892         file->length = st.st_size;
 893         file->mode = st.st_mode;
 894         file->uid = st.st_uid;
 895         file->gid = st.st_gid;
 896
 897 #if SUPPORT_HARD_LINKS
 898         if (flist && flist->hlink_pool) {
 899                 if (protocol_version < 28) {
 900                         if (S_ISREG(st.st_mode))
 901                                 file->link_u.idev = pool_talloc(
 902                                     flist->hlink_pool, struct idev, 1,
 903                                     "inode_table");
 904                 } else {
 905                         if (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
 906                                 file->link_u.idev = pool_talloc(
 907                                     flist->hlink_pool, struct idev, 1,
 908                                     "inode_table");
 909                 }
 910         }
 911         if (file->link_u.idev) {
 912                 file->F_DEV = st.st_dev;
 913                 file->F_INODE = st.st_ino;
 914         }
 915 #endif
 916
 917         if (dirname_len) {
 918                 file->dirname = lastdir = bp;
 919                 lastdir_len = dirname_len - 1;
 920                 memcpy(bp, dirname, dirname_len - 1);
 921                 bp += dirname_len;
 922                 bp[-1] = '\0';
 923         } else if (dirname)
 924                 file->dirname = dirname;
 925
 926         file->basename = bp;
 927         memcpy(bp, basename, basename_len);
 928         bp += basename_len;
 929
 930 #ifdef HAVE_STRUCT_STAT_ST_RDEV
 931         if (preserve_devices && IS_DEVICE(st.st_mode))
 932                 file->u.rdev = st.st_rdev;
 933 #endif
 934
 935 #if SUPPORT_LINKS
 936         if (linkname_len) {
 937                 file->u.link = bp;
 938                 memcpy(bp, linkname, linkname_len);
 939                 bp += linkname_len;
 940         }
 941 #endif
 942
 943         if (sum_len) {
 944                 file->u.sum = bp;
 945                 file_checksum(thisname, bp, st.st_size);
 946                 /*bp += sum_len;*/
 947         }
 948
 949         file->basedir = flist_dir;
 950
 951         /* This code is only used by the receiver when it is building
 952          * a list of files for a delete pass. */
 953         if (keep_dirlinks && linkname_len && flist) {
 954                 STRUCT_STAT st2;
 955                 int i = flist_find(received_flist, file);
 956                 if (i >= 0 && S_ISDIR(received_flist->files[i]->mode)
 957                     && do_stat(thisname, &st2) == 0 && S_ISDIR(st2.st_mode)) {
 958                         file->modtime = st2.st_mtime;
 959                         file->length = st2.st_size;
 960                         file->mode = st2.st_mode;
 961                         file->uid = st2.st_uid;
 962                         file->gid = st2.st_gid;
 963                         file->u.link = NULL;
 964                         if (file->link_u.idev) {
 965                                 pool_free(flist->hlink_pool, 0, file->link_u.idev);
 966                                 file->link_u.idev = NULL;
 967                         }
 968                 }
 969         }
 970
 971         if (!S_ISDIR(st.st_mode))
 972                 stats.total_size += st.st_size;
 973
 974         return file;
 975 }
 976
 977
 978 void send_file_name(int f, struct file_list *flist, char *fname,
 979                     int recursive, unsigned short base_flags)
 980 {
 981         struct file_struct *file;
 982         char fbuf[MAXPATHLEN];
 983
 984         /* f is set to -1 when calculating deletion file list */
 985         file = make_file(fname, flist,
 986             f == -1 && delete_excluded? SERVER_EXCLUDES : ALL_EXCLUDES);
 987
 988         if (!file)
 989                 return;
 990
 991         maybe_emit_filelist_progress(flist);
 992
 993         flist_expand(flist);
 994
 995         if (file->basename[0]) {
 996                 flist->files[flist->count++] = file;
 997                 send_file_entry(file, f, base_flags);
 998         }
 999
1000         if (recursive && S_ISDIR(file->mode)
1001             && !(file->flags & FLAG_MOUNT_POINT)) {
1002                 send_directory(f, flist, f_name_to(file, fbuf));
1003         }
1004 }
1005
1006
1007 /* Note that the "recurse" value either contains -1, for infinite recursion,
1008  * or a number >= 0 indicating how many levels of recursion we will allow. */
1009 static void send_directory(int f, struct file_list *flist, char *dir)
1010 {
1011         DIR *d;
1012         struct dirent *di;
1013         char fname[MAXPATHLEN];
1014         unsigned int offset;
1015         void *save_excludes;
1016         char *p;
1017
1018         d = opendir(dir);
1019         if (!d) {
1020                 io_error |= IOERR_GENERAL;
1021                 rsyserr(FERROR, errno, "opendir %s failed", full_fname(dir));
1022                 return;
1023         }
1024
1025         offset = strlcpy(fname, dir, MAXPATHLEN);
1026         p = fname + offset;
1027         if (offset >= MAXPATHLEN || p[-1] != '/') {
1028                 if (offset >= MAXPATHLEN - 1) {
1029                         io_error |= IOERR_GENERAL;
1030                         rprintf(FERROR, "skipping long-named directory: %s\n",
1031                                 full_fname(fname));
1032                         closedir(d);
1033                         return;
1034                 }
1035                 *p++ = '/';
1036                 offset++;
1037         }
1038
1039         save_excludes = push_local_excludes(fname, offset);
1040
1041         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1042                 char *dname = d_name(di);
1043                 if (dname[0] == '.' && (dname[1] == '\0'
1044                     || (dname[1] == '.' && dname[2] == '\0')))
1045                         continue;
1046                 if (strlcpy(p, dname, MAXPATHLEN - offset) < MAXPATHLEN - offset) {
1047                         int do_subdirs = recurse >= 1 ? recurse-- : recurse;
1048                         send_file_name(f, flist, fname, do_subdirs, 0);
1049                 } else {
1050                         io_error |= IOERR_GENERAL;
1051                         rprintf(FINFO,
1052                                 "cannot send long-named file %s\n",
1053                                 full_fname(fname));
1054                 }
1055         }
1056         if (errno) {
1057                 io_error |= IOERR_GENERAL;
1058                 rsyserr(FERROR, errno, "readdir(%s)", dir);
1059         }
1060
1061         pop_local_excludes(save_excludes);
1062
1063         closedir(d);
1064 }
1065
1066
1067 /* This function is normally called by the sender, but the receiving side
1068  * also uses it to construct one or more file lists if one of the --delete
1069  * options have been specified.  The delete_in_dir() function sets f to -1
1070  * so that we just construct the file list in memory without sending it
1071  * over the wire.  It also has the side-effect of ignoring user-excludes if
1072  * delete_excluded is set (so that the delete list includes user-excluded
1073  * files) and it avoids some per-arg init code for limited recursion (since
1074  * delete_in_dir() sets recurse before calling this function). */
1075 struct file_list *send_file_list(int f, int argc, char *argv[])
1076 {
1077         int l;
1078         STRUCT_STAT st;
1079         char *p, *dir, olddir[sizeof curr_dir];
1080         char lastpath[MAXPATHLEN] = "";
1081         struct file_list *flist;
1082         BOOL need_first_push = True;
1083         int64 start_write;
1084         int use_ff_fd = 0;
1085
1086         if (show_filelist_p() && f != -1)
1087                 start_filelist_progress("building file list");
1088
1089         start_write = stats.total_written;
1090
1091         flist = flist_new(f == -1 ? WITHOUT_HLINK : WITH_HLINK,
1092                           "send_file_list");
1093
1094         if (f != -1) {
1095                 io_start_buffering_out();
1096                 if (filesfrom_fd >= 0) {
1097                         if (argv[0] && !push_dir(argv[0])) {
1098                                 rsyserr(FERROR, errno, "push_dir %s failed",
1099                                         full_fname(argv[0]));
1100                                 exit_cleanup(RERR_FILESELECT);
1101                         }
1102                         use_ff_fd = 1;
1103                         if (curr_dir_len < MAXPATHLEN - 1) {
1104                                 push_local_excludes(curr_dir, curr_dir_len);
1105                                 need_first_push = False;
1106                         }
1107                 }
1108         }
1109
1110         while (1) {
1111                 char fname2[MAXPATHLEN];
1112                 char *fname = fname2;
1113                 int do_subdirs;
1114
1115                 if (use_ff_fd) {
1116                         if (read_filesfrom_line(filesfrom_fd, fname) == 0)
1117                                 break;
1118                         sanitize_path(fname, fname, "", 0);
1119                 } else {
1120                         if (argc-- == 0)
1121                                 break;
1122                         strlcpy(fname, *argv++, MAXPATHLEN);
1123                         if (sanitize_paths)
1124                                 sanitize_path(fname, fname, "", 0);
1125                 }
1126
1127                 l = strlen(fname);
1128                 if (!l || fname[l - 1] == '/') {
1129                         if (l == 2 && fname[0] == '.') {
1130                                 /* Turn "./" into just "." rather than "./." */
1131                                 fname[1] = '\0';
1132                         } else if (l < MAXPATHLEN) {
1133                                 fname[l++] = '.';
1134                                 fname[l] = '\0';
1135                         }
1136                 }
1137                 if (f == -1)
1138                         ; /* recurse is pre-set */
1139                 else if (fname[l-1] == '.' && (l == 1 || fname[l-2] == '/')) {
1140                         if (!recurse && xfer_dirs)
1141                                 recurse = 1; /* allow one level */
1142                 } else if (recurse > 0)
1143                         recurse = 0;
1144
1145                 if (need_first_push) {
1146                         if ((p = strrchr(fname, '/')) != NULL) {
1147                                 if (*++p && strcmp(p, ".") != 0)
1148                                         push_local_excludes(fname, p - fname);
1149                         } else if (strcmp(fname, ".") != 0)
1150                                 push_local_excludes(fname, 0);
1151                         need_first_push = False;
1152                 }
1153
1154                 if (link_stat(fname, &st, keep_dirlinks) != 0) {
1155                         if (f != -1) {
1156                                 io_error |= IOERR_GENERAL;
1157                                 rsyserr(FERROR, errno, "link_stat %s failed",
1158                                         full_fname(fname));
1159                         }
1160                         continue;
1161                 }
1162
1163                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
1164                         rprintf(FINFO, "skipping directory %s\n", fname);
1165                         continue;
1166                 }
1167
1168                 dir = NULL;
1169                 olddir[0] = '\0';
1170
1171                 if (!relative_paths) {
1172                         p = strrchr(fname, '/');
1173                         if (p) {
1174                                 *p = 0;
1175                                 if (p == fname)
1176                                         dir = "/";
1177                                 else
1178                                         dir = fname;
1179                                 fname = p + 1;
1180                         }
1181                 } else if (f != -1 && implied_dirs && (p=strrchr(fname,'/')) && p != fname) {
1182                         /* this ensures we send the intermediate directories,
1183                            thus getting their permissions right */
1184                         char *lp = lastpath, *fn = fname, *slash = fname;
1185                         *p = 0;
1186                         /* Skip any initial directories in our path that we
1187                          * have in common with lastpath. */
1188                         while (*fn && *lp == *fn) {
1189                                 if (*fn == '/')
1190                                         slash = fn;
1191                                 lp++, fn++;
1192                         }
1193                         *p = '/';
1194                         if (fn != p || (*lp && *lp != '/')) {
1195                                 int save_copy_links = copy_links;
1196                                 int save_xfer_dirs = xfer_dirs;
1197                                 copy_links = copy_unsafe_links;
1198                                 xfer_dirs = 1;
1199                                 while ((slash = strchr(slash+1, '/')) != 0) {
1200                                         *slash = 0;
1201                                         send_file_name(f, flist, fname, 0, 0);
1202                                         *slash = '/';
1203                                 }
1204                                 copy_links = save_copy_links;
1205                                 xfer_dirs = save_xfer_dirs;
1206                                 *p = 0;
1207                                 strlcpy(lastpath, fname, sizeof lastpath);
1208                                 *p = '/';
1209                         }
1210                 }
1211
1212                 if (!*fname)
1213                         fname = ".";
1214
1215                 if (dir && *dir) {
1216                         static char *lastdir;
1217                         static int lastdir_len;
1218
1219                         strcpy(olddir, curr_dir); /* can't overflow */
1220
1221                         if (!push_dir(dir)) {
1222                                 io_error |= IOERR_GENERAL;
1223                                 rsyserr(FERROR, errno, "push_dir %s failed",
1224                                         full_fname(dir));
1225                                 continue;
1226                         }
1227
1228                         if (lastdir && strcmp(lastdir, dir) == 0) {
1229                                 flist_dir = lastdir;
1230                                 flist_dir_len = lastdir_len;
1231                         } else {
1232                                 flist_dir = lastdir = strdup(dir);
1233                                 flist_dir_len = lastdir_len = strlen(dir);
1234                         }
1235                 }
1236
1237                 if (one_file_system)
1238                         set_filesystem(fname);
1239
1240                 do_subdirs = recurse >= 1 ? recurse-- : recurse;
1241                 send_file_name(f, flist, fname, do_subdirs, XMIT_DEL_START);
1242
1243                 if (olddir[0]) {
1244                         flist_dir = NULL;
1245                         flist_dir_len = 0;
1246                         if (!pop_dir(olddir)) {
1247                                 rsyserr(FERROR, errno, "pop_dir %s failed",
1248                                         full_fname(dir));
1249                                 exit_cleanup(RERR_FILESELECT);
1250                         }
1251                 }
1252         }
1253
1254         if (f != -1) {
1255                 send_file_entry(NULL, f, 0);
1256
1257                 if (show_filelist_p())
1258                         finish_filelist_progress(flist);
1259         }
1260
1261         if (flist->hlink_pool) {
1262                 pool_destroy(flist->hlink_pool);
1263                 flist->hlink_pool = NULL;
1264         }
1265
1266         clean_flist(flist, 0, 0);
1267
1268         if (f != -1) {
1269                 /* Now send the uid/gid list. This was introduced in
1270                  * protocol version 15 */
1271                 send_uid_list(f);
1272
1273                 /* send the io_error flag */
1274                 write_int(f, lp_ignore_errors(module_id) ? 0 : io_error);
1275
1276                 io_end_buffering();
1277                 stats.flist_size = stats.total_written - start_write;
1278                 stats.num_files = flist->count;
1279         }
1280
1281         if (verbose > 3)
1282                 output_flist(flist, f < 0 ? "delete" : who_am_i());
1283
1284         if (verbose > 2)
1285                 rprintf(FINFO, "send_file_list done\n");
1286
1287         return flist;
1288 }
1289
1290
1291 struct file_list *recv_file_list(int f)
1292 {
1293         struct file_list *flist;
1294         unsigned short flags;
1295         int64 start_read;
1296
1297         if (show_filelist_p())
1298                 start_filelist_progress("receiving file list");
1299
1300         start_read = stats.total_read;
1301
1302         flist = flist_new(WITH_HLINK, "recv_file_list");
1303         received_flist = flist;
1304
1305         flist->count = 0;
1306         flist->malloced = 1000;
1307         flist->files = new_array(struct file_struct *, flist->malloced);
1308         if (!flist->files)
1309                 goto oom;
1310
1311
1312         while ((flags = read_byte(f)) != 0) {
1313                 int i = flist->count;
1314
1315                 flist_expand(flist);
1316
1317                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
1318                         flags |= read_byte(f) << 8;
1319                 receive_file_entry(&flist->files[i], flags, flist, f);
1320
1321                 if (S_ISREG(flist->files[i]->mode))
1322                         stats.total_size += flist->files[i]->length;
1323
1324                 flist->count++;
1325
1326                 maybe_emit_filelist_progress(flist);
1327
1328                 if (verbose > 2) {
1329                         rprintf(FINFO, "recv_file_name(%s)\n",
1330                                 f_name(flist->files[i]));
1331                 }
1332         }
1333         receive_file_entry(NULL, 0, NULL, 0); /* Signal that we're done. */
1334
1335         if (verbose > 2)
1336                 rprintf(FINFO, "received %d names\n", flist->count);
1337
1338         if (show_filelist_p())
1339                 finish_filelist_progress(flist);
1340
1341         clean_flist(flist, relative_paths, 1);
1342
1343         if (f != -1) {
1344                 /* Now send the uid/gid list. This was introduced in
1345                  * protocol version 15 */
1346                 recv_uid_list(f, flist);
1347
1348                 /* Recv the io_error flag */
1349                 if (lp_ignore_errors(module_id) || ignore_errors)
1350                         read_int(f);
1351                 else
1352                         io_error |= read_int(f);
1353         }
1354
1355         if (verbose > 3)
1356                 output_flist(flist, who_am_i());
1357
1358         if (list_only) {
1359                 int i;
1360                 for (i = 0; i < flist->count; i++)
1361                         list_file_entry(flist->files[i]);
1362         }
1363
1364         if (verbose > 2)
1365                 rprintf(FINFO, "recv_file_list done\n");
1366
1367         stats.flist_size = stats.total_read - start_read;
1368         stats.num_files = flist->count;
1369
1370         return flist;
1371
1372 oom:
1373         out_of_memory("recv_file_list");
1374         return NULL;            /* not reached */
1375 }
1376
1377
1378 int file_compare(struct file_struct **file1, struct file_struct **file2)
1379 {
1380         struct file_struct *f1 = *file1;
1381         struct file_struct *f2 = *file2;
1382
1383         if (!f1->basename && !f2->basename)
1384                 return 0;
1385         if (!f1->basename)
1386                 return -1;
1387         if (!f2->basename)
1388                 return 1;
1389         if (f1->dirname == f2->dirname)
1390                 return u_strcmp(f1->basename, f2->basename);
1391         return f_name_cmp(f1, f2);
1392 }
1393
1394
1395 int flist_find(struct file_list *flist, struct file_struct *f)
1396 {
1397         int low = 0, high = flist->count - 1;
1398
1399         while (high >= 0 && !flist->files[high]->basename) high--;
1400
1401         if (high < 0)
1402                 return -1;
1403
1404         while (low != high) {
1405                 int mid = (low + high) / 2;
1406                 int ret = file_compare(&flist->files[flist_up(flist, mid)],&f);
1407                 if (ret == 0)
1408                         return flist_up(flist, mid);
1409                 if (ret > 0)
1410                         high = mid;
1411                 else
1412                         low = mid + 1;
1413         }
1414
1415         if (file_compare(&flist->files[flist_up(flist, low)], &f) == 0)
1416                 return flist_up(flist, low);
1417         return -1;
1418 }
1419
1420 /*
1421  * Free up any resources a file_struct has allocated
1422  * and clear the file.
1423  */
1424 void clear_file(int i, struct file_list *flist)
1425 {
1426         if (flist->hlink_pool && flist->files[i]->link_u.idev)
1427                 pool_free(flist->hlink_pool, 0, flist->files[i]->link_u.idev);
1428         memset(flist->files[i], 0, file_struct_len);
1429 }
1430
1431
1432 /*
1433  * allocate a new file list
1434  */
1435 struct file_list *flist_new(int with_hlink, char *msg)
1436 {
1437         struct file_list *flist;
1438
1439         flist = new(struct file_list);
1440         if (!flist)
1441                 out_of_memory(msg);
1442
1443         memset(flist, 0, sizeof (struct file_list));
1444
1445         if (!(flist->file_pool = pool_create(FILE_EXTENT, 0,
1446             out_of_memory, POOL_INTERN)))
1447                 out_of_memory(msg);
1448
1449 #if SUPPORT_HARD_LINKS
1450         if (with_hlink && preserve_hard_links) {
1451                 if (!(flist->hlink_pool = pool_create(HLINK_EXTENT,
1452                     sizeof (struct idev), out_of_memory, POOL_INTERN)))
1453                         out_of_memory(msg);
1454         }
1455 #endif
1456
1457         return flist;
1458 }
1459
1460 /*
1461  * free up all elements in a flist
1462  */
1463 void flist_free(struct file_list *flist)
1464 {
1465         pool_destroy(flist->file_pool);
1466         pool_destroy(flist->hlink_pool);
1467         free(flist->files);
1468         free(flist);
1469 }
1470
1471
1472 /*
1473  * This routine ensures we don't have any duplicate names in our file list.
1474  * duplicate names can cause corruption because of the pipelining
1475  */
1476 static void clean_flist(struct file_list *flist, int strip_root, int no_dups)
1477 {
1478         int i, prev_i = 0;
1479
1480         if (!flist || flist->count == 0)
1481                 return;
1482
1483         qsort(flist->files, flist->count,
1484             sizeof flist->files[0], (int (*)())file_compare);
1485
1486         for (i = no_dups? 0 : flist->count; i < flist->count; i++) {
1487                 if (flist->files[i]->basename) {
1488                         prev_i = i;
1489                         break;
1490                 }
1491         }
1492         while (++i < flist->count) {
1493                 if (!flist->files[i]->basename)
1494                         continue;
1495                 if (f_name_cmp(flist->files[i], flist->files[prev_i]) == 0) {
1496                         if (verbose > 1 && !am_server) {
1497                                 rprintf(FINFO,
1498                                         "removing duplicate name %s from file list %d\n",
1499                                         f_name(flist->files[i]), i);
1500                         }
1501                         /* Make sure that if we unduplicate '.', that we don't
1502                          * lose track of a user-specified starting point (or
1503                          * else deletions will mysteriously fail with -R). */
1504                         if (flist->files[i]->flags & FLAG_DEL_START)
1505                                 flist->files[prev_i]->flags |= FLAG_DEL_START;
1506
1507                         clear_file(i, flist);
1508                 } else
1509                         prev_i = i;
1510         }
1511
1512         if (strip_root) {
1513                 /* we need to strip off the root directory in the case
1514                    of relative paths, but this must be done _after_
1515                    the sorting phase */
1516                 for (i = 0; i < flist->count; i++) {
1517                         if (flist->files[i]->dirname &&
1518                             flist->files[i]->dirname[0] == '/') {
1519                                 memmove(&flist->files[i]->dirname[0],
1520                                         &flist->files[i]->dirname[1],
1521                                         strlen(flist->files[i]->dirname));
1522                         }
1523
1524                         if (flist->files[i]->dirname &&
1525                             !flist->files[i]->dirname[0]) {
1526                                 flist->files[i]->dirname = NULL;
1527                         }
1528                 }
1529         }
1530 }
1531
1532 static void output_flist(struct file_list *flist, const char *whose_list)
1533 {
1534         char uidbuf[16], gidbuf[16];
1535         struct file_struct *file;
1536         int i;
1537
1538         for (i = 0; i < flist->count; i++) {
1539                 file = flist->files[i];
1540                 if ((am_root || am_sender) && preserve_uid)
1541                         sprintf(uidbuf, " uid=%ld", (long)file->uid);
1542                 else
1543                         *uidbuf = '\0';
1544                 if (preserve_gid && file->gid != GID_NONE)
1545                         sprintf(gidbuf, " gid=%ld", (long)file->gid);
1546                 else
1547                         *gidbuf = '\0';
1548                 rprintf(FINFO, "[%s] i=%d %s %s %s mode=0%o len=%.0f%s%s\n",
1549                         whose_list, i, NS(file->basedir), NS(file->dirname),
1550                         NS(file->basename), (int)file->mode,
1551                         (double)file->length, uidbuf, gidbuf);
1552         }
1553 }
1554
1555
1556 enum fnc_state { fnc_DIR, fnc_SLASH, fnc_BASE };
1557
1558 /* Compare the names of two file_struct entities, just like strcmp()
1559  * would do if it were operating on the joined strings.  We assume
1560  * that there are no 0-length strings.
1561  */
1562 int f_name_cmp(struct file_struct *f1, struct file_struct *f2)
1563 {
1564         int dif;
1565         const uchar *c1, *c2;
1566         enum fnc_state state1, state2;
1567
1568         if (!f1 || !f1->basename) {
1569                 if (!f2 || !f2->basename)
1570                         return 0;
1571                 return -1;
1572         }
1573         if (!f2 || !f2->basename)
1574                 return 1;
1575
1576         if (!(c1 = (uchar*)f1->dirname)) {
1577                 state1 = fnc_BASE;
1578                 c1 = (uchar*)f1->basename;
1579         } else if (!*c1) {
1580                 state1 = fnc_SLASH;
1581                 c1 = (uchar*)"/";
1582         } else
1583                 state1 = fnc_DIR;
1584         if (!(c2 = (uchar*)f2->dirname)) {
1585                 state2 = fnc_BASE;
1586                 c2 = (uchar*)f2->basename;
1587         } else if (!*c2) {
1588                 state2 = fnc_SLASH;
1589                 c2 = (uchar*)"/";
1590         } else
1591                 state2 = fnc_DIR;
1592
1593         while (1) {
1594                 if ((dif = (int)*c1 - (int)*c2) != 0)
1595                         break;
1596                 if (!*++c1) {
1597                         switch (state1) {
1598                         case fnc_DIR:
1599                                 state1 = fnc_SLASH;
1600                                 c1 = (uchar*)"/";
1601                                 break;
1602                         case fnc_SLASH:
1603                                 state1 = fnc_BASE;
1604                                 c1 = (uchar*)f1->basename;
1605                                 break;
1606                         case fnc_BASE:
1607                                 break;
1608                         }
1609                 }
1610                 if (!*++c2) {
1611                         switch (state2) {
1612                         case fnc_DIR:
1613                                 state2 = fnc_SLASH;
1614                                 c2 = (uchar*)"/";
1615                                 break;
1616                         case fnc_SLASH:
1617                                 state2 = fnc_BASE;
1618                                 c2 = (uchar*)f2->basename;
1619                                 break;
1620                         case fnc_BASE:
1621                                 if (!*c1)
1622                                         return 0;
1623                                 break;
1624                         }
1625                 }
1626         }
1627
1628         return dif;
1629 }
1630
1631
1632 /* Return a copy of the full filename of a flist entry, using the indicated
1633  * buffer.  No size-checking is done because we checked the size when creating
1634  * the file_struct entry.
1635  */
1636 char *f_name_to(struct file_struct *f, char *fbuf)
1637 {
1638         if (!f || !f->basename)
1639                 return NULL;
1640
1641         if (f->dirname) {
1642                 int len = strlen(f->dirname);
1643                 memcpy(fbuf, f->dirname, len);
1644                 fbuf[len] = '/';
1645                 strcpy(fbuf + len + 1, f->basename);
1646         } else
1647                 strcpy(fbuf, f->basename);
1648         return fbuf;
1649 }
1650
1651
1652 /* Like f_name_to(), but we rotate through 5 static buffers of our own.
1653  */
1654 char *f_name(struct file_struct *f)
1655 {
1656         static char names[5][MAXPATHLEN];
1657         static unsigned int n;
1658
1659         n = (n + 1) % (sizeof names / sizeof names[0]);
1660
1661         return f_name_to(f, names[n]);
1662 }
1663
1664 static int is_backup_file(char *fn)
1665 {
1666         int k = strlen(fn) - backup_suffix_len;
1667         return k > 0 && strcmp(fn+k, backup_suffix) == 0;
1668 }
1669
1670 void delete_in_dir(struct file_list *flist, char *fname)
1671 {
1672         static int deletion_count = 0;
1673         struct file_list *del_flist;
1674         int save_recurse = recurse;
1675         int save_xfer_dirs = xfer_dirs;
1676         int save_implied_dirs = implied_dirs;
1677         int save_relative_paths = relative_paths;
1678         char *argv[1];
1679         int i, j, mode;
1680
1681         if (max_delete && deletion_count >= max_delete)
1682                 return;
1683
1684         if (io_error && !(lp_ignore_errors(module_id) || ignore_errors)) {
1685                 rprintf(FINFO, "IO error encountered - skipping file deletion\n");
1686                 max_delete = -1; /* avoid duplicating the above warning */
1687                 return;
1688         }
1689
1690         if (delete_during) {
1691                 recurse = 1; /* allow one level only */
1692                 xfer_dirs = 1;
1693                 implied_dirs = 0;
1694                 relative_paths = 1;
1695         }
1696
1697         argv[0] = fname;
1698         del_flist = send_file_list(-1, 1, argv);
1699
1700         relative_paths = save_relative_paths;
1701         implied_dirs = save_implied_dirs;
1702         xfer_dirs = save_xfer_dirs;
1703         recurse = save_recurse;
1704
1705         if (!del_flist)
1706                 return;
1707
1708         if (verbose > 1)
1709                 rprintf(FINFO, "deleting in %s\n", safe_fname(fname));
1710
1711         for (i = del_flist->count-1; i >= 0; i--) {
1712                 if (max_delete && deletion_count >= max_delete)
1713                         break;
1714                 if (!del_flist->files[i]->basename)
1715                         continue;
1716                 mode = del_flist->files[i]->mode;
1717                 if ((j = flist_find(flist, del_flist->files[i])) < 0
1718                     || (delete_during && S_ISDIR(mode)
1719                      && !S_ISDIR(flist->files[j]->mode))) {
1720                         char *f = f_name(del_flist->files[i]);
1721                         if (make_backups && (backup_dir || !is_backup_file(f))
1722                           && !S_ISDIR(mode)) {
1723                                 make_backup(f);
1724                                 if (verbose) {
1725                                         rprintf(FINFO, "deleting %s\n",
1726                                                 safe_fname(f));
1727                                 }
1728                         } else {
1729                                 delete_file(f, S_ISDIR(mode)
1730                                                 ? DEL_DIR | DEL_RECURSE : 0);
1731                         }
1732                         deletion_count++;
1733                 }
1734         }
1735         flist_free(del_flist);
1736 }