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 always_checksum;
  38 extern int module_id;
  39 extern int ignore_errors;
  40 extern int numeric_ids;
  41
  42 extern int cvs_exclude;
  43
  44 extern int recurse;
  45 extern char curr_dir[MAXPATHLEN];
  46 extern char *files_from;
  47 extern int filesfrom_fd;
  48
  49 extern int one_file_system;
  50 extern int preserve_links;
  51 extern int preserve_hard_links;
  52 extern int preserve_perms;
  53 extern int preserve_devices;
  54 extern int preserve_uid;
  55 extern int preserve_gid;
  56 extern int preserve_times;
  57 extern int relative_paths;
  58 extern int implied_dirs;
  59 extern int copy_links;
  60 extern int copy_unsafe_links;
  61 extern int protocol_version;
  62 extern int sanitize_paths;
  63
  64 extern int read_batch;
  65 extern int write_batch;
  66
  67 extern struct exclude_list_struct exclude_list;
  68 extern struct exclude_list_struct server_exclude_list;
  69 extern struct exclude_list_struct local_exclude_list;
  70
  71 int io_error;
  72
  73 static char empty_sum[MD4_SUM_LENGTH];
  74 static unsigned int file_struct_len;
  75
  76 static void clean_flist(struct file_list *flist, int strip_root, int no_dups);
  77 static void output_flist(struct file_list *flist);
  78
  79 void init_flist(void)
  80 {
  81         struct file_struct f;
  82
  83         /* Figure out how big the file_struct is without trailing padding */
  84         file_struct_len = offsetof(struct file_struct, flags) + sizeof f.flags;
  85 }
  86
  87
  88 static int show_filelist_p(void)
  89 {
  90         return verbose && (recurse || files_from) && !am_server;
  91 }
  92
  93 static void start_filelist_progress(char *kind)
  94 {
  95         rprintf(FINFO, "%s ... ", kind);
  96         if ((verbose > 1) || do_progress)
  97                 rprintf(FINFO, "\n");
  98         rflush(FINFO);
  99 }
 100
 101
 102 static void emit_filelist_progress(const struct file_list *flist)
 103 {
 104         rprintf(FINFO, " %d files...\r", flist->count);
 105 }
 106
 107
 108 static void maybe_emit_filelist_progress(const struct file_list *flist)
 109 {
 110         if (do_progress && show_filelist_p() && ((flist->count % 100) == 0))
 111                 emit_filelist_progress(flist);
 112 }
 113
 114
 115 static void finish_filelist_progress(const struct file_list *flist)
 116 {
 117         if (do_progress) {
 118                 /* This overwrites the progress line */
 119                 rprintf(FINFO, "%d file%sto consider\n",
 120                         flist->count, flist->count == 1 ? " " : "s ");
 121         } else
 122                 rprintf(FINFO, "done\n");
 123 }
 124
 125 void show_flist_stats(void)
 126 {
 127         /* Nothing yet */
 128 }
 129
 130
 131 static void list_file_entry(struct file_struct *f)
 132 {
 133         char perms[11];
 134
 135         if (!f->basename)
 136                 /* this can happen if duplicate names were removed */
 137                 return;
 138
 139         permstring(perms, f->mode);
 140
 141 #if SUPPORT_LINKS
 142         if (preserve_links && S_ISLNK(f->mode)) {
 143                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
 144                         perms,
 145                         (double) f->length, timestring(f->modtime),
 146                         f_name(f), f->u.link);
 147         } else
 148 #endif
 149                 rprintf(FINFO, "%s %11.0f %s %s\n",
 150                         perms,
 151                         (double) f->length, timestring(f->modtime),
 152                         f_name(f));
 153 }
 154
 155
 156 /**
 157  * Stat either a symlink or its referent, depending on the settings of
 158  * copy_links, copy_unsafe_links, etc.
 159  *
 160  * @retval -1 on error
 161  *
 162  * @retval 0 for success
 163  *
 164  * @post If @p path is a symlink, then @p linkbuf (of size @c
 165  * MAXPATHLEN) contains the symlink target.
 166  *
 167  * @post @p buffer contains information about the link or the
 168  * referrent as appropriate, if they exist.
 169  **/
 170 int readlink_stat(const char *path, STRUCT_STAT *buffer, char *linkbuf)
 171 {
 172 #if SUPPORT_LINKS
 173         if (copy_links)
 174                 return do_stat(path, buffer);
 175         if (do_lstat(path, buffer) == -1)
 176                 return -1;
 177         if (S_ISLNK(buffer->st_mode)) {
 178                 int l = readlink((char *) path, linkbuf, MAXPATHLEN - 1);
 179                 if (l == -1)
 180                         return -1;
 181                 linkbuf[l] = 0;
 182                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 183                         if (verbose > 1) {
 184                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 185                                         path, linkbuf);
 186                         }
 187                         return do_stat(path, buffer);
 188                 }
 189         }
 190         return 0;
 191 #else
 192         return do_stat(path, buffer);
 193 #endif
 194 }
 195
 196 int link_stat(const char *path, STRUCT_STAT * buffer)
 197 {
 198 #if SUPPORT_LINKS
 199         if (copy_links)
 200                 return do_stat(path, buffer);
 201         return do_lstat(path, buffer);
 202 #else
 203         return do_stat(path, buffer);
 204 #endif
 205 }
 206
 207 /*
 208  * This function is used to check if a file should be included/excluded
 209  * from the list of files based on its name and type etc.  The value of
 210  * exclude_level is set to either SERVER_EXCLUDES or ALL_EXCLUDES.
 211  */
 212 static int check_exclude_file(char *fname, int is_dir, int exclude_level)
 213 {
 214         int rc;
 215
 216 #if 0 /* This currently never happens, so avoid a useless compare. */
 217         if (exclude_level == NO_EXCLUDES)
 218                 return 0;
 219 #endif
 220         if (fname) {
 221                 /* never exclude '.', even if somebody does --exclude '*' */
 222                 if (fname[0] == '.' && !fname[1])
 223                         return 0;
 224                 /* Handle the -R version of the '.' dir. */
 225                 if (fname[0] == '/') {
 226                         int len = strlen(fname);
 227                         if (fname[len-1] == '.' && fname[len-2] == '/')
 228                                 return 0;
 229                 }
 230         }
 231         if (server_exclude_list.head
 232             && check_exclude(&server_exclude_list, fname, is_dir) < 0)
 233                 return 1;
 234         if (exclude_level != ALL_EXCLUDES)
 235                 return 0;
 236         if (exclude_list.head
 237             && (rc = check_exclude(&exclude_list, fname, is_dir)) != 0)
 238                 return rc < 0;
 239         if (local_exclude_list.head
 240             && check_exclude(&local_exclude_list, fname, is_dir) < 0)
 241                 return 1;
 242         return 0;
 243 }
 244
 245 /* used by the one_file_system code */
 246 static dev_t filesystem_dev;
 247
 248 static void set_filesystem(char *fname)
 249 {
 250         STRUCT_STAT st;
 251         if (link_stat(fname, &st) != 0)
 252                 return;
 253         filesystem_dev = st.st_dev;
 254 }
 255
 256
 257 static int to_wire_mode(mode_t mode)
 258 {
 259 #if SUPPORT_LINKS
 260         if (S_ISLNK(mode) && (_S_IFLNK != 0120000))
 261                 return (mode & ~(_S_IFMT)) | 0120000;
 262 #endif
 263         return (int) mode;
 264 }
 265
 266 static mode_t from_wire_mode(int mode)
 267 {
 268         if ((mode & (_S_IFMT)) == 0120000 && (_S_IFLNK != 0120000))
 269                 return (mode & ~(_S_IFMT)) | _S_IFLNK;
 270         return (mode_t) mode;
 271 }
 272
 273
 274 static void send_directory(int f, struct file_list *flist, char *dir);
 275
 276 static char *flist_dir;
 277 static int flist_dir_len;
 278
 279
 280 /**
 281  * Make sure @p flist is big enough to hold at least @p flist->count
 282  * entries.
 283  **/
 284 void flist_expand(struct file_list *flist)
 285 {
 286         void *new_ptr;
 287
 288         if (flist->count < flist->malloced)
 289                 return;
 290
 291         if (flist->malloced < FLIST_START)
 292                 flist->malloced = FLIST_START;
 293         else if (flist->malloced >= FLIST_LINEAR)
 294                 flist->malloced += FLIST_LINEAR;
 295         else
 296                 flist->malloced *= 2;
 297
 298         /*
 299          * In case count jumped or we are starting the list
 300          * with a known size just set it.
 301          */
 302         if (flist->malloced < flist->count)
 303                 flist->malloced = flist->count;
 304
 305         if (flist->files) {
 306                 new_ptr = realloc_array(flist->files,
 307                     struct file_struct *, flist->malloced);
 308         } else {
 309                 new_ptr = new_array(struct file_struct *, flist->malloced);
 310         }
 311
 312         if (verbose >= 2) {
 313                 rprintf(FINFO, "[%s] expand file_list to %.0f bytes, did%s move\n",
 314                     who_am_i(),
 315                     (double) sizeof flist->files[0] * flist->malloced,
 316                     (new_ptr == flist->files) ? " not" : "");
 317         }
 318
 319         flist->files = (struct file_struct **) new_ptr;
 320
 321         if (!flist->files)
 322                 out_of_memory("flist_expand");
 323 }
 324
 325 void send_file_entry(struct file_struct *file, int f, unsigned short base_flags)
 326 {
 327         unsigned short flags;
 328         static time_t modtime;
 329         static mode_t mode;
 330         static uint64 dev;
 331         static dev_t rdev;
 332         static uint32 rdev_major;
 333         static uid_t uid;
 334         static gid_t gid;
 335         static char lastname[MAXPATHLEN];
 336         char *fname, fbuf[MAXPATHLEN];
 337         int l1, l2;
 338
 339         if (f == -1)
 340                 return;
 341
 342         if (!file) {
 343                 write_byte(f, 0);
 344                 modtime = 0, mode = 0;
 345                 dev = 0, rdev = makedev(0, 0);
 346                 rdev_major = 0;
 347                 uid = 0, gid = 0;
 348                 *lastname = '\0';
 349                 return;
 350         }
 351
 352         io_write_phase = "send_file_entry";
 353
 354         fname = f_name_to(file, fbuf);
 355
 356         flags = base_flags;
 357
 358         if (file->mode == mode)
 359                 flags |= XMIT_SAME_MODE;
 360         else
 361                 mode = file->mode;
 362         if (preserve_devices) {
 363                 if (protocol_version < 28) {
 364                         if (IS_DEVICE(mode)) {
 365                                 if (file->u.rdev == rdev)
 366                                         flags |= XMIT_SAME_RDEV_pre28;
 367                                 else
 368                                         rdev = file->u.rdev;
 369                         } else
 370                                 rdev = makedev(0, 0);
 371                 } else if (IS_DEVICE(mode)) {
 372                         rdev = file->u.rdev;
 373                         if ((uint32)major(rdev) == rdev_major)
 374                                 flags |= XMIT_SAME_RDEV_MAJOR;
 375                         else
 376                                 rdev_major = major(rdev);
 377                         if ((uint32)minor(rdev) <= 0xFFu)
 378                                 flags |= XMIT_RDEV_MINOR_IS_SMALL;
 379                 }
 380         }
 381         if (file->uid == uid)
 382                 flags |= XMIT_SAME_UID;
 383         else
 384                 uid = file->uid;
 385         if (file->gid == gid)
 386                 flags |= XMIT_SAME_GID;
 387         else
 388                 gid = file->gid;
 389         if (file->modtime == modtime)
 390                 flags |= XMIT_SAME_TIME;
 391         else
 392                 modtime = file->modtime;
 393
 394 #if SUPPORT_HARD_LINKS
 395         if (file->link_u.idev) {
 396                 if (file->F_DEV == dev) {
 397                         if (protocol_version >= 28)
 398                                 flags |= XMIT_SAME_DEV;
 399                 } else
 400                         dev = file->F_DEV;
 401                 flags |= XMIT_HAS_IDEV_DATA;
 402         }
 403 #endif
 404
 405         for (l1 = 0;
 406             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 407             l1++) {}
 408         l2 = strlen(fname+l1);
 409
 410         if (l1 > 0)
 411                 flags |= XMIT_SAME_NAME;
 412         if (l2 > 255)
 413                 flags |= XMIT_LONG_NAME;
 414
 415         /* We must make sure we don't send a zero flag byte or the
 416          * other end will terminate the flist transfer.  Note that
 417          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 418          * it's harmless way to add a bit to the first flag byte. */
 419         if (protocol_version >= 28) {
 420                 if (!flags && !S_ISDIR(mode))
 421                         flags |= XMIT_TOP_DIR;
 422                 if ((flags & 0xFF00) || !flags) {
 423                         flags |= XMIT_EXTENDED_FLAGS;
 424                         write_byte(f, flags);
 425                         write_byte(f, flags >> 8);
 426                 } else
 427                         write_byte(f, flags);
 428         } else {
 429                 if (!(flags & 0xFF) && !S_ISDIR(mode))
 430                         flags |= XMIT_TOP_DIR;
 431                 if (!(flags & 0xFF))
 432                         flags |= XMIT_LONG_NAME;
 433                 write_byte(f, flags);
 434         }
 435         if (flags & XMIT_SAME_NAME)
 436                 write_byte(f, l1);
 437         if (flags & XMIT_LONG_NAME)
 438                 write_int(f, l2);
 439         else
 440                 write_byte(f, l2);
 441         write_buf(f, fname + l1, l2);
 442
 443         write_longint(f, file->length);
 444         if (!(flags & XMIT_SAME_TIME))
 445                 write_int(f, modtime);
 446         if (!(flags & XMIT_SAME_MODE))
 447                 write_int(f, to_wire_mode(mode));
 448         if (preserve_uid && !(flags & XMIT_SAME_UID)) {
 449                 if (!numeric_ids)
 450                         add_uid(uid);
 451                 write_int(f, uid);
 452         }
 453         if (preserve_gid && !(flags & XMIT_SAME_GID)) {
 454                 if (!numeric_ids)
 455                         add_gid(gid);
 456                 write_int(f, gid);
 457         }
 458         if (preserve_devices && IS_DEVICE(mode)) {
 459                 if (protocol_version < 28) {
 460                         if (!(flags & XMIT_SAME_RDEV_pre28))
 461                                 write_int(f, (int)rdev);
 462                 } else {
 463                         if (!(flags & XMIT_SAME_RDEV_MAJOR))
 464                                 write_int(f, major(rdev));
 465                         if (flags & XMIT_RDEV_MINOR_IS_SMALL)
 466                                 write_byte(f, minor(rdev));
 467                         else
 468                                 write_int(f, minor(rdev));
 469                 }
 470         }
 471
 472 #if SUPPORT_LINKS
 473         if (preserve_links && S_ISLNK(mode)) {
 474                 int len = strlen(file->u.link);
 475                 write_int(f, len);
 476                 write_buf(f, file->u.link, len);
 477         }
 478 #endif
 479
 480 #if SUPPORT_HARD_LINKS
 481         if (flags & XMIT_HAS_IDEV_DATA) {
 482                 if (protocol_version < 26) {
 483                         /* 32-bit dev_t and ino_t */
 484                         write_int(f, dev);
 485                         write_int(f, file->F_INODE);
 486                 } else {
 487                         /* 64-bit dev_t and ino_t */
 488                         if (!(flags & XMIT_SAME_DEV))
 489                                 write_longint(f, dev);
 490                         write_longint(f, file->F_INODE);
 491                 }
 492         }
 493 #endif
 494
 495         if (always_checksum) {
 496                 char *sum;
 497                 if (S_ISREG(mode))
 498                         sum = file->u.sum;
 499                 else if (protocol_version < 28) {
 500                         /* Prior to 28, we sent a useless set of nulls. */
 501                         sum = empty_sum;
 502                 } else
 503                         sum = NULL;
 504                 if (sum) {
 505                         write_buf(f, sum,
 506                             protocol_version < 21 ? 2 : MD4_SUM_LENGTH);
 507                 }
 508         }
 509
 510         strlcpy(lastname, fname, MAXPATHLEN);
 511
 512         io_write_phase = "unknown";
 513 }
 514
 515
 516
 517 void receive_file_entry(struct file_struct **fptr, unsigned short flags,
 518     struct file_list *flist, int f)
 519 {
 520         static time_t modtime;
 521         static mode_t mode;
 522         static uint64 dev;
 523         static dev_t rdev;
 524         static uint32 rdev_major;
 525         static uid_t uid;
 526         static gid_t gid;
 527         static char lastname[MAXPATHLEN], *lastdir;
 528         static int lastdir_len = -1;
 529         char thisname[MAXPATHLEN];
 530         unsigned int l1 = 0, l2 = 0;
 531         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
 532         OFF_T file_length;
 533         char *basename, *dirname, *bp;
 534         struct file_struct *file;
 535
 536         if (!fptr) {
 537                 modtime = 0, mode = 0;
 538                 dev = 0, rdev = makedev(0, 0);
 539                 rdev_major = 0;
 540                 uid = 0, gid = 0;
 541                 *lastname = '\0';
 542                 return;
 543         }
 544
 545         if (!flist || !flist->count)    /* Ignore lastdir when invalid. */
 546                 lastdir_len = -1;
 547
 548         if (flags & XMIT_SAME_NAME)
 549                 l1 = read_byte(f);
 550
 551         if (flags & XMIT_LONG_NAME)
 552                 l2 = read_int(f);
 553         else
 554                 l2 = read_byte(f);
 555
 556         if (l2 >= MAXPATHLEN - l1) {
 557                 rprintf(FERROR,
 558                         "overflow: flags=0x%x l1=%d l2=%d lastname=%s\n",
 559                         flags, l1, l2, lastname);
 560                 overflow("receive_file_entry");
 561         }
 562
 563         strlcpy(thisname, lastname, l1 + 1);
 564         read_sbuf(f, &thisname[l1], l2);
 565         thisname[l1 + l2] = 0;
 566
 567         strlcpy(lastname, thisname, MAXPATHLEN);
 568
 569         clean_fname(thisname);
 570
 571         if (sanitize_paths)
 572                 sanitize_path(thisname, NULL);
 573
 574         if ((basename = strrchr(thisname, '/')) != NULL) {
 575                 dirname_len = ++basename - thisname; /* counts future '\0' */
 576                 if (lastdir_len == dirname_len - 1
 577                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
 578                         dirname = lastdir;
 579                         dirname_len = 0; /* indicates no copy is needed */
 580                 } else
 581                         dirname = thisname;
 582         } else {
 583                 basename = thisname;
 584                 dirname = NULL;
 585                 dirname_len = 0;
 586         }
 587         basename_len = strlen(basename) + 1; /* count the '\0' */
 588
 589         file_length = read_longint(f);
 590         if (!(flags & XMIT_SAME_TIME))
 591                 modtime = (time_t)read_int(f);
 592         if (!(flags & XMIT_SAME_MODE))
 593                 mode = from_wire_mode(read_int(f));
 594
 595         if (preserve_uid && !(flags & XMIT_SAME_UID))
 596                 uid = (uid_t)read_int(f);
 597         if (preserve_gid && !(flags & XMIT_SAME_GID))
 598                 gid = (gid_t)read_int(f);
 599
 600         if (preserve_devices) {
 601                 if (protocol_version < 28) {
 602                         if (IS_DEVICE(mode)) {
 603                                 if (!(flags & XMIT_SAME_RDEV_pre28))
 604                                         rdev = (dev_t)read_int(f);
 605                         } else
 606                                 rdev = makedev(0, 0);
 607                 } else if (IS_DEVICE(mode)) {
 608                         uint32 rdev_minor;
 609                         if (!(flags & XMIT_SAME_RDEV_MAJOR))
 610                                 rdev_major = read_int(f);
 611                         if (flags & XMIT_RDEV_MINOR_IS_SMALL)
 612                                 rdev_minor = read_byte(f);
 613                         else
 614                                 rdev_minor = read_int(f);
 615                         rdev = makedev(rdev_major, rdev_minor);
 616                 }
 617         }
 618
 619 #if SUPPORT_LINKS
 620         if (preserve_links && S_ISLNK(mode)) {
 621                 linkname_len = read_int(f) + 1; /* count the '\0' */
 622                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 623                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 624                                 linkname_len - 1);
 625                         overflow("receive_file_entry");
 626                 }
 627         }
 628         else
 629 #endif
 630                 linkname_len = 0;
 631
 632         sum_len = always_checksum && S_ISREG(mode) ? MD4_SUM_LENGTH : 0;
 633
 634         alloc_len = file_struct_len + dirname_len + basename_len
 635                   + linkname_len + sum_len;
 636         bp = pool_alloc(flist->file_pool, alloc_len, "receive_file_entry");
 637
 638         file = *fptr = (struct file_struct *)bp;
 639         memset(bp, 0, file_struct_len);
 640         bp += file_struct_len;
 641
 642         file->flags = flags & XMIT_TOP_DIR ? FLAG_TOP_DIR : 0;
 643         file->modtime = modtime;
 644         file->length = file_length;
 645         file->mode = mode;
 646         file->uid = uid;
 647         file->gid = gid;
 648
 649         if (dirname_len) {
 650                 file->dirname = lastdir = bp;
 651                 lastdir_len = dirname_len - 1;
 652                 memcpy(bp, dirname, dirname_len - 1);
 653                 bp += dirname_len;
 654                 bp[-1] = '\0';
 655         } else if (dirname)
 656                 file->dirname = dirname;
 657
 658         file->basename = bp;
 659         memcpy(bp, basename, basename_len);
 660         bp += basename_len;
 661
 662         if (preserve_devices && IS_DEVICE(mode))
 663                 file->u.rdev = rdev;
 664
 665 #if SUPPORT_LINKS
 666         if (linkname_len) {
 667                 file->u.link = bp;
 668                 read_sbuf(f, bp, linkname_len - 1);
 669                 if (sanitize_paths)
 670                         sanitize_path(bp, lastdir);
 671                 bp += linkname_len;
 672         }
 673 #endif
 674
 675 #if SUPPORT_HARD_LINKS
 676         if (preserve_hard_links && protocol_version < 28 && S_ISREG(mode))
 677                 flags |= XMIT_HAS_IDEV_DATA;
 678         if (flags & XMIT_HAS_IDEV_DATA) {
 679                 uint64 inode;
 680                 if (protocol_version < 26) {
 681                         dev = read_int(f);
 682                         inode = read_int(f);
 683                 } else {
 684                         if (!(flags & XMIT_SAME_DEV))
 685                                 dev = read_longint(f);
 686                         inode = read_longint(f);
 687                 }
 688                 if (flist->hlink_pool) {
 689                         file->link_u.idev = pool_talloc(flist->hlink_pool,
 690                             struct idev, 1, "inode_table");
 691                         file->F_INODE = inode;
 692                         file->F_DEV = dev;
 693                 }
 694         }
 695 #endif
 696
 697         if (always_checksum) {
 698                 char *sum;
 699                 if (sum_len) {
 700                         file->u.sum = sum = bp;
 701                         /*bp += sum_len;*/
 702                 } else if (protocol_version < 28) {
 703                         /* Prior to 28, we get a useless set of nulls. */
 704                         sum = empty_sum;
 705                 } else
 706                         sum = NULL;
 707                 if (sum) {
 708                         read_buf(f, sum,
 709                             protocol_version < 21 ? 2 : MD4_SUM_LENGTH);
 710                 }
 711         }
 712
 713         if (!preserve_perms) {
 714                 extern int orig_umask;
 715                 /* set an appropriate set of permissions based on original
 716                  * permissions and umask. This emulates what GNU cp does */
 717                 file->mode &= ~orig_umask;
 718         }
 719 }
 720
 721
 722 /**
 723  * Create a file_struct for a named file by reading its stat()
 724  * information and performing extensive checks against global
 725  * options.
 726  *
 727  * @return the new file, or NULL if there was an error or this file
 728  * should be excluded.
 729  *
 730  * @todo There is a small optimization opportunity here to avoid
 731  * stat()ing the file in some circumstances, which has a certain cost.
 732  * We are called immediately after doing readdir(), and so we may
 733  * already know the d_type of the file.  We could for example avoid
 734  * statting directories if we're not recursing, but this is not a very
 735  * important case.  Some systems may not have d_type.
 736  **/
 737 struct file_struct *make_file(char *fname,
 738     struct file_list *flist, int exclude_level)
 739 {
 740         static char *lastdir;
 741         static int lastdir_len = -1;
 742         struct file_struct *file;
 743         STRUCT_STAT st;
 744         char sum[SUM_LENGTH];
 745         char thisname[MAXPATHLEN];
 746         char linkname[MAXPATHLEN];
 747         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
 748         char *basename, *dirname, *bp;
 749         unsigned short flags = 0;
 750
 751         if (!flist || !flist->count)    /* Ignore lastdir when invalid. */
 752                 lastdir_len = -1;
 753
 754         if (strlcpy(thisname, fname, sizeof thisname)
 755             >= sizeof thisname - flist_dir_len) {
 756                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
 757                 return NULL;
 758         }
 759         clean_fname(thisname);
 760         if (sanitize_paths)
 761                 sanitize_path(thisname, NULL);
 762
 763         memset(sum, 0, SUM_LENGTH);
 764
 765         if (readlink_stat(thisname, &st, linkname) != 0) {
 766                 int save_errno = errno;
 767                 if (errno == ENOENT) {
 768                         enum logcode c = am_daemon && protocol_version < 28
 769                             ? FERROR : FINFO;
 770                         /* either symlink pointing nowhere or file that
 771                          * was removed during rsync run; see if excluded
 772                          * before reporting an error */
 773                         if (exclude_level != NO_EXCLUDES
 774                             && check_exclude_file(thisname, 0, exclude_level)) {
 775                                 /* file is excluded anyway, ignore silently */
 776                                 return NULL;
 777                         }
 778                         io_error |= IOERR_VANISHED;
 779                         rprintf(c, "file has vanished: %s\n",
 780                             full_fname(thisname));
 781                 }
 782                 else {
 783                         io_error |= IOERR_GENERAL;
 784                         rprintf(FERROR, "readlink %s failed: %s\n",
 785                             full_fname(thisname), strerror(save_errno));
 786                 }
 787                 return NULL;
 788         }
 789
 790         /* backup.c calls us with exclude_level set to NO_EXCLUDES. */
 791         if (exclude_level == NO_EXCLUDES)
 792                 goto skip_excludes;
 793
 794         if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
 795                 rprintf(FINFO, "skipping directory %s\n", thisname);
 796                 return NULL;
 797         }
 798
 799         /* We only care about directories because we need to avoid recursing
 800          * into a mount-point directory, not to avoid copying a symlinked
 801          * file if -L (or similar) was specified. */
 802         if (one_file_system && st.st_dev != filesystem_dev
 803             && S_ISDIR(st.st_mode))
 804                 flags |= FLAG_MOUNT_POINT;
 805
 806         if (check_exclude_file(thisname, S_ISDIR(st.st_mode) != 0, exclude_level))
 807                 return NULL;
 808
 809         if (lp_ignore_nonreadable(module_id) && access(thisname, R_OK) != 0)
 810                 return NULL;
 811
 812 skip_excludes:
 813
 814         if (verbose > 2) {
 815                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
 816                         who_am_i(), thisname, exclude_level);
 817         }
 818
 819         if ((basename = strrchr(thisname, '/')) != NULL) {
 820                 dirname_len = ++basename - thisname; /* counts future '\0' */
 821                 if (lastdir_len == dirname_len - 1
 822                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
 823                         dirname = lastdir;
 824                         dirname_len = 0; /* indicates no copy is needed */
 825                 } else
 826                         dirname = thisname;
 827         } else {
 828                 basename = thisname;
 829                 dirname = NULL;
 830                 dirname_len = 0;
 831         }
 832         basename_len = strlen(basename) + 1; /* count the '\0' */
 833
 834 #if SUPPORT_LINKS
 835         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
 836 #else
 837         linkname_len = 0;
 838 #endif
 839
 840         sum_len = always_checksum && S_ISREG(st.st_mode) ? MD4_SUM_LENGTH : 0;
 841
 842         alloc_len = file_struct_len + dirname_len + basename_len
 843             + linkname_len + sum_len;
 844         if (flist) {
 845                 bp = pool_alloc(flist->file_pool, alloc_len,
 846                     "receive_file_entry");
 847         } else {
 848                 if (!(bp = new_array(char, alloc_len)))
 849                         out_of_memory("receive_file_entry");
 850         }
 851
 852         file = (struct file_struct *)bp;
 853         memset(bp, 0, file_struct_len);
 854         bp += file_struct_len;
 855
 856         file->flags = flags;
 857         file->modtime = st.st_mtime;
 858         file->length = st.st_size;
 859         file->mode = st.st_mode;
 860         file->uid = st.st_uid;
 861         file->gid = st.st_gid;
 862
 863 #if SUPPORT_HARD_LINKS
 864         if (flist && flist->hlink_pool) {
 865                 if (protocol_version < 28) {
 866                         if (S_ISREG(st.st_mode))
 867                                 file->link_u.idev = pool_talloc(
 868                                     flist->hlink_pool, struct idev, 1,
 869                                     "inode_table");
 870                 } else {
 871                         if (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
 872                                 file->link_u.idev = pool_talloc(
 873                                     flist->hlink_pool, struct idev, 1,
 874                                     "inode_table");
 875                 }
 876         }
 877         if (file->link_u.idev) {
 878                 file->F_DEV = st.st_dev;
 879                 file->F_INODE = st.st_ino;
 880         }
 881 #endif
 882
 883         if (dirname_len) {
 884                 file->dirname = lastdir = bp;
 885                 lastdir_len = dirname_len - 1;
 886                 memcpy(bp, dirname, dirname_len - 1);
 887                 bp += dirname_len;
 888                 bp[-1] = '\0';
 889         } else if (dirname)
 890                 file->dirname = dirname;
 891
 892         file->basename = bp;
 893         memcpy(bp, basename, basename_len);
 894         bp += basename_len;
 895
 896 #ifdef HAVE_STRUCT_STAT_ST_RDEV
 897         if (preserve_devices && IS_DEVICE(st.st_mode))
 898                 file->u.rdev = st.st_rdev;
 899 #endif
 900
 901 #if SUPPORT_LINKS
 902         if (linkname_len) {
 903                 file->u.link = bp;
 904                 memcpy(bp, linkname, linkname_len);
 905                 bp += linkname_len;
 906         }
 907 #endif
 908
 909         if (sum_len) {
 910                 file->u.sum = bp;
 911                 file_checksum(thisname, bp, st.st_size);
 912                 /*bp += sum_len;*/
 913         }
 914
 915         file->basedir = flist_dir;
 916
 917         if (!S_ISDIR(st.st_mode))
 918                 stats.total_size += st.st_size;
 919
 920         return file;
 921 }
 922
 923
 924 void send_file_name(int f, struct file_list *flist, char *fname,
 925                     int recursive, unsigned short base_flags)
 926 {
 927         struct file_struct *file;
 928         char fbuf[MAXPATHLEN];
 929         extern int delete_excluded;
 930
 931         /* f is set to -1 when calculating deletion file list */
 932         file = make_file(fname, flist,
 933             f == -1 && delete_excluded? SERVER_EXCLUDES : ALL_EXCLUDES);
 934
 935         if (!file)
 936                 return;
 937
 938         maybe_emit_filelist_progress(flist);
 939
 940         flist_expand(flist);
 941
 942         if (write_batch)
 943                 file->flags |= FLAG_TOP_DIR;
 944
 945         if (file->basename[0]) {
 946                 flist->files[flist->count++] = file;
 947                 send_file_entry(file, f, base_flags);
 948         }
 949
 950         if (recursive && S_ISDIR(file->mode)
 951             && !(file->flags & FLAG_MOUNT_POINT)) {
 952                 struct exclude_list_struct last_list = local_exclude_list;
 953                 local_exclude_list.head = local_exclude_list.tail = NULL;
 954                 send_directory(f, flist, f_name_to(file, fbuf));
 955                 free_exclude_list(&local_exclude_list);
 956                 local_exclude_list = last_list;
 957         }
 958 }
 959
 960
 961 static void send_directory(int f, struct file_list *flist, char *dir)
 962 {
 963         DIR *d;
 964         struct dirent *di;
 965         char fname[MAXPATHLEN];
 966         unsigned int offset;
 967         char *p;
 968
 969         d = opendir(dir);
 970         if (!d) {
 971                 io_error |= IOERR_GENERAL;
 972                 rprintf(FERROR, "opendir %s failed: %s\n",
 973                         full_fname(dir), strerror(errno));
 974                 return;
 975         }
 976
 977         offset = strlcpy(fname, dir, MAXPATHLEN);
 978         p = fname + offset;
 979         if (offset >= MAXPATHLEN || p[-1] != '/') {
 980                 if (offset >= MAXPATHLEN - 1) {
 981                         io_error |= IOERR_GENERAL;
 982                         rprintf(FERROR, "skipping long-named directory: %s\n",
 983                                 full_fname(fname));
 984                         closedir(d);
 985                         return;
 986                 }
 987                 *p++ = '/';
 988                 offset++;
 989         }
 990
 991         if (cvs_exclude) {
 992                 if (strlcpy(p, ".cvsignore", MAXPATHLEN - offset)
 993                     < MAXPATHLEN - offset) {
 994                         add_exclude_file(&local_exclude_list, fname,
 995                                          XFLG_WORD_SPLIT | XFLG_WORDS_ONLY);
 996                 } else {
 997                         io_error |= IOERR_GENERAL;
 998                         rprintf(FINFO,
 999                                 "cannot cvs-exclude in long-named directory %s\n",
1000                                 full_fname(fname));
1001                 }
1002         }
1003
1004         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1005                 char *dname = d_name(di);
1006                 if (dname[0] == '.' && (dname[1] == '\0'
1007                     || (dname[1] == '.' && dname[2] == '\0')))
1008                         continue;
1009                 if (strlcpy(p, dname, MAXPATHLEN - offset) < MAXPATHLEN - offset)
1010                         send_file_name(f, flist, fname, recurse, 0);
1011                 else {
1012                         io_error |= IOERR_GENERAL;
1013                         rprintf(FINFO,
1014                                 "cannot send long-named file %s\n",
1015                                 full_fname(fname));
1016                 }
1017         }
1018         if (errno) {
1019                 io_error |= IOERR_GENERAL;
1020                 rprintf(FERROR, "readdir(%s): (%d) %s\n",
1021                         dir, errno, strerror(errno));
1022         }
1023
1024         closedir(d);
1025 }
1026
1027
1028 /**
1029  * The delete_files() function in receiver.c sets f to -1 so that we just
1030  * construct the file list in memory without sending it over the wire.  It
1031  * also has the side-effect of ignoring user-excludes if delete_excluded
1032  * is set (so that the delete list includes user-excluded files).
1033  **/
1034 struct file_list *send_file_list(int f, int argc, char *argv[])
1035 {
1036         int l;
1037         STRUCT_STAT st;
1038         char *p, *dir, olddir[sizeof curr_dir];
1039         char lastpath[MAXPATHLEN] = "";
1040         struct file_list *flist;
1041         int64 start_write;
1042         int use_ff_fd = 0;
1043
1044         if (show_filelist_p() && f != -1)
1045                 start_filelist_progress("building file list");
1046
1047         start_write = stats.total_written;
1048
1049         flist = flist_new(f == -1 ? WITHOUT_HLINK : WITH_HLINK,
1050             "send_file_list");
1051
1052         if (f != -1) {
1053                 io_start_buffering_out(f);
1054                 if (filesfrom_fd >= 0) {
1055                         if (argv[0] && !push_dir(argv[0])) {
1056                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1057                                         full_fname(argv[0]), strerror(errno));
1058                                 exit_cleanup(RERR_FILESELECT);
1059                         }
1060                         use_ff_fd = 1;
1061                 }
1062         }
1063
1064         while (1) {
1065                 char fname2[MAXPATHLEN];
1066                 char *fname = fname2;
1067
1068                 if (use_ff_fd) {
1069                         if (read_filesfrom_line(filesfrom_fd, fname) == 0)
1070                                 break;
1071                         sanitize_path(fname, NULL);
1072                 } else {
1073                         if (argc-- == 0)
1074                                 break;
1075                         strlcpy(fname, *argv++, MAXPATHLEN);
1076                         if (sanitize_paths)
1077                                 sanitize_path(fname, NULL);
1078                 }
1079
1080                 l = strlen(fname);
1081                 if (fname[l - 1] == '/') {
1082                         if (l == 2 && fname[0] == '.') {
1083                                 /* Turn "./" into just "." rather than "./." */
1084                                 fname[1] = '\0';
1085                         } else if (l < MAXPATHLEN) {
1086                                 fname[l++] = '.';
1087                                 fname[l] = '\0';
1088                         }
1089                 }
1090
1091                 if (link_stat(fname, &st) != 0) {
1092                         if (f != -1) {
1093                                 io_error |= IOERR_GENERAL;
1094                                 rprintf(FERROR, "link_stat %s failed: %s\n",
1095                                         full_fname(fname), strerror(errno));
1096                         }
1097                         continue;
1098                 }
1099
1100                 if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
1101                         rprintf(FINFO, "skipping directory %s\n", fname);
1102                         continue;
1103                 }
1104
1105                 dir = NULL;
1106                 olddir[0] = '\0';
1107
1108                 if (!relative_paths) {
1109                         p = strrchr(fname, '/');
1110                         if (p) {
1111                                 *p = 0;
1112                                 if (p == fname)
1113                                         dir = "/";
1114                                 else
1115                                         dir = fname;
1116                                 fname = p + 1;
1117                         }
1118                 } else if (f != -1 && implied_dirs && (p=strrchr(fname,'/')) && p != fname) {
1119                         /* this ensures we send the intermediate directories,
1120                            thus getting their permissions right */
1121                         char *lp = lastpath, *fn = fname, *slash = fname;
1122                         *p = 0;
1123                         /* Skip any initial directories in our path that we
1124                          * have in common with lastpath. */
1125                         while (*fn && *lp == *fn) {
1126                                 if (*fn == '/')
1127                                         slash = fn;
1128                                 lp++, fn++;
1129                         }
1130                         *p = '/';
1131                         if (fn != p || (*lp && *lp != '/')) {
1132                                 int copy_links_saved = copy_links;
1133                                 int recurse_saved = recurse;
1134                                 copy_links = copy_unsafe_links;
1135                                 /* set recurse to 1 to prevent make_file
1136                                  * from ignoring directory, but still
1137                                  * turn off the recursive parameter to
1138                                  * send_file_name */
1139                                 recurse = 1;
1140                                 while ((slash = strchr(slash+1, '/')) != 0) {
1141                                         *slash = 0;
1142                                         send_file_name(f, flist, fname, 0, 0);
1143                                         *slash = '/';
1144                                 }
1145                                 copy_links = copy_links_saved;
1146                                 recurse = recurse_saved;
1147                                 *p = 0;
1148                                 strlcpy(lastpath, fname, sizeof lastpath);
1149                                 *p = '/';
1150                         }
1151                 }
1152
1153                 if (!*fname)
1154                         fname = ".";
1155
1156                 if (dir && *dir) {
1157                         static char *lastdir;
1158                         static int lastdir_len;
1159
1160                         strcpy(olddir, curr_dir); /* can't overflow */
1161
1162                         if (!push_dir(dir)) {
1163                                 io_error |= IOERR_GENERAL;
1164                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1165                                         full_fname(dir), strerror(errno));
1166                                 continue;
1167                         }
1168
1169                         if (lastdir && strcmp(lastdir, dir) == 0) {
1170                                 flist_dir = lastdir;
1171                                 flist_dir_len = lastdir_len;
1172                         } else {
1173                                 flist_dir = lastdir = strdup(dir);
1174                                 flist_dir_len = lastdir_len = strlen(dir);
1175                         }
1176                 }
1177
1178                 if (one_file_system)
1179                         set_filesystem(fname);
1180
1181                 send_file_name(f, flist, fname, recurse, XMIT_TOP_DIR);
1182
1183                 if (olddir[0]) {
1184                         flist_dir = NULL;
1185                         flist_dir_len = 0;
1186                         if (!pop_dir(olddir)) {
1187                                 rprintf(FERROR, "pop_dir %s failed: %s\n",
1188                                         full_fname(dir), strerror(errno));
1189                                 exit_cleanup(RERR_FILESELECT);
1190                         }
1191                 }
1192         }
1193
1194         if (f != -1) {
1195                 send_file_entry(NULL, f, 0);
1196
1197                 if (show_filelist_p())
1198                         finish_filelist_progress(flist);
1199         }
1200
1201         if (flist->hlink_pool) {
1202                 pool_destroy(flist->hlink_pool);
1203                 flist->hlink_pool = NULL;
1204         }
1205
1206         clean_flist(flist, 0, 0);
1207
1208         if (f != -1) {
1209                 /* Now send the uid/gid list. This was introduced in
1210                  * protocol version 15 */
1211                 send_uid_list(f);
1212
1213                 /* send the io_error flag */
1214                 write_int(f, lp_ignore_errors(module_id) ? 0 : io_error);
1215
1216                 io_end_buffering();
1217                 stats.flist_size = stats.total_written - start_write;
1218                 stats.num_files = flist->count;
1219                 if (write_batch)
1220                         write_batch_flist_info(flist->count, flist->files);
1221         }
1222
1223         if (verbose > 3)
1224                 output_flist(flist);
1225
1226         if (verbose > 2)
1227                 rprintf(FINFO, "send_file_list done\n");
1228
1229         return flist;
1230 }
1231
1232
1233 struct file_list *recv_file_list(int f)
1234 {
1235         struct file_list *flist;
1236         unsigned short flags;
1237         int64 start_read;
1238         extern int list_only;
1239
1240         if (show_filelist_p())
1241                 start_filelist_progress("receiving file list");
1242
1243         start_read = stats.total_read;
1244
1245         flist = flist_new(WITH_HLINK, "recv_file_list");
1246
1247         flist->count = 0;
1248         flist->malloced = 1000;
1249         flist->files = new_array(struct file_struct *, flist->malloced);
1250         if (!flist->files)
1251                 goto oom;
1252
1253
1254         while ((flags = read_byte(f)) != 0) {
1255                 int i = flist->count;
1256
1257                 flist_expand(flist);
1258
1259                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
1260                         flags |= read_byte(f) << 8;
1261                 receive_file_entry(&flist->files[i], flags, flist, f);
1262
1263                 if (S_ISREG(flist->files[i]->mode))
1264                         stats.total_size += flist->files[i]->length;
1265
1266                 flist->count++;
1267
1268                 maybe_emit_filelist_progress(flist);
1269
1270                 if (verbose > 2) {
1271                         rprintf(FINFO, "recv_file_name(%s)\n",
1272                                 f_name(flist->files[i]));
1273                 }
1274         }
1275         receive_file_entry(NULL, 0, NULL, 0); /* Signal that we're done. */
1276
1277         if (verbose > 2)
1278                 rprintf(FINFO, "received %d names\n", flist->count);
1279
1280         if (show_filelist_p())
1281                 finish_filelist_progress(flist);
1282
1283         clean_flist(flist, relative_paths, 1);
1284
1285         if (f != -1) {
1286                 /* Now send the uid/gid list. This was introduced in
1287                  * protocol version 15 */
1288                 recv_uid_list(f, flist);
1289
1290                 if (!read_batch) {
1291                         /* Recv the io_error flag */
1292                         if (lp_ignore_errors(module_id) || ignore_errors)
1293                                 read_int(f);
1294                         else
1295                                 io_error |= read_int(f);
1296                 }
1297         }
1298
1299         if (verbose > 3)
1300                 output_flist(flist);
1301
1302         if (list_only) {
1303                 int i;
1304                 for (i = 0; i < flist->count; i++)
1305                         list_file_entry(flist->files[i]);
1306         }
1307
1308         if (verbose > 2)
1309                 rprintf(FINFO, "recv_file_list done\n");
1310
1311         stats.flist_size = stats.total_read - start_read;
1312         stats.num_files = flist->count;
1313
1314         return flist;
1315
1316 oom:
1317         out_of_memory("recv_file_list");
1318         return NULL;            /* not reached */
1319 }
1320
1321
1322 int file_compare(struct file_struct **file1, struct file_struct **file2)
1323 {
1324         struct file_struct *f1 = *file1;
1325         struct file_struct *f2 = *file2;
1326
1327         if (!f1->basename && !f2->basename)
1328                 return 0;
1329         if (!f1->basename)
1330                 return -1;
1331         if (!f2->basename)
1332                 return 1;
1333         if (f1->dirname == f2->dirname)
1334                 return u_strcmp(f1->basename, f2->basename);
1335         return f_name_cmp(f1, f2);
1336 }
1337
1338
1339 int flist_find(struct file_list *flist, struct file_struct *f)
1340 {
1341         int low = 0, high = flist->count - 1;
1342
1343         while (high >= 0 && !flist->files[high]->basename) high--;
1344
1345         if (high < 0)
1346                 return -1;
1347
1348         while (low != high) {
1349                 int mid = (low + high) / 2;
1350                 int ret = file_compare(&flist->files[flist_up(flist, mid)],&f);
1351                 if (ret == 0)
1352                         return flist_up(flist, mid);
1353                 if (ret > 0)
1354                         high = mid;
1355                 else
1356                         low = mid + 1;
1357         }
1358
1359         if (file_compare(&flist->files[flist_up(flist, low)], &f) == 0)
1360                 return flist_up(flist, low);
1361         return -1;
1362 }
1363
1364 /*
1365  * Free up any resources a file_struct has allocated
1366  * and clear the file.
1367  */
1368 void clear_file(int i, struct file_list *flist)
1369 {
1370         if (flist->hlink_pool && flist->files[i]->link_u.idev)
1371                 pool_free(flist->hlink_pool, 0, flist->files[i]->link_u.idev);
1372         memset(flist->files[i], 0, file_struct_len);
1373 }
1374
1375
1376 /*
1377  * allocate a new file list
1378  */
1379 struct file_list *flist_new(int with_hlink, char *msg)
1380 {
1381         struct file_list *flist;
1382
1383         flist = new(struct file_list);
1384         if (!flist)
1385                 out_of_memory(msg);
1386
1387         memset(flist, 0, sizeof (struct file_list));
1388
1389         if (!(flist->file_pool = pool_create(FILE_EXTENT, 0,
1390             out_of_memory, POOL_INTERN)))
1391                 out_of_memory(msg);
1392
1393 #if SUPPORT_HARD_LINKS
1394         if (with_hlink && preserve_hard_links) {
1395                 if (!(flist->hlink_pool = pool_create(HLINK_EXTENT,
1396                     sizeof (struct idev), out_of_memory, POOL_INTERN)))
1397                         out_of_memory(msg);
1398         }
1399 #endif
1400
1401         return flist;
1402 }
1403
1404 /*
1405  * free up all elements in a flist
1406  */
1407 void flist_free(struct file_list *flist)
1408 {
1409         pool_destroy(flist->file_pool);
1410         pool_destroy(flist->hlink_pool);
1411         free(flist->files);
1412         free(flist);
1413 }
1414
1415
1416 /*
1417  * This routine ensures we don't have any duplicate names in our file list.
1418  * duplicate names can cause corruption because of the pipelining
1419  */
1420 static void clean_flist(struct file_list *flist, int strip_root, int no_dups)
1421 {
1422         int i, prev_i = 0;
1423
1424         if (!flist || flist->count == 0)
1425                 return;
1426
1427         qsort(flist->files, flist->count,
1428             sizeof flist->files[0], (int (*)()) file_compare);
1429
1430         for (i = no_dups? 0 : flist->count; i < flist->count; i++) {
1431                 if (flist->files[i]->basename) {
1432                         prev_i = i;
1433                         break;
1434                 }
1435         }
1436         while (++i < flist->count) {
1437                 if (!flist->files[i]->basename)
1438                         continue;
1439                 if (f_name_cmp(flist->files[i], flist->files[prev_i]) == 0) {
1440                         if (verbose > 1 && !am_server) {
1441                                 rprintf(FINFO,
1442                                         "removing duplicate name %s from file list %d\n",
1443                                         f_name(flist->files[i]), i);
1444                         }
1445                         /* Make sure that if we unduplicate '.', that we don't
1446                          * lose track of a user-specified starting point (or
1447                          * else deletions will mysteriously fail with -R). */
1448                         if (flist->files[i]->flags & FLAG_TOP_DIR)
1449                                 flist->files[prev_i]->flags |= FLAG_TOP_DIR;
1450
1451                         clear_file(i, flist);
1452                 } else
1453                         prev_i = i;
1454         }
1455
1456         if (strip_root) {
1457                 /* we need to strip off the root directory in the case
1458                    of relative paths, but this must be done _after_
1459                    the sorting phase */
1460                 for (i = 0; i < flist->count; i++) {
1461                         if (flist->files[i]->dirname &&
1462                             flist->files[i]->dirname[0] == '/') {
1463                                 memmove(&flist->files[i]->dirname[0],
1464                                         &flist->files[i]->dirname[1],
1465                                         strlen(flist->files[i]->dirname));
1466                         }
1467
1468                         if (flist->files[i]->dirname &&
1469                             !flist->files[i]->dirname[0]) {
1470                                 flist->files[i]->dirname = NULL;
1471                         }
1472                 }
1473         }
1474 }
1475
1476 static void output_flist(struct file_list *flist)
1477 {
1478         char uidbuf[16], gidbuf[16];
1479         struct file_struct *file;
1480         int i;
1481
1482         for (i = 0; i < flist->count; i++) {
1483                 file = flist->files[i];
1484                 if (am_root && preserve_uid)
1485                         sprintf(uidbuf, " uid=%ld", (long)file->uid);
1486                 else
1487                         *uidbuf = '\0';
1488                 if (preserve_gid && file->gid != GID_NONE)
1489                         sprintf(gidbuf, " gid=%ld", (long)file->gid);
1490                 else
1491                         *gidbuf = '\0';
1492                 rprintf(FINFO, "[%s] i=%d %s %s %s mode=0%o len=%.0f%s%s\n",
1493                         who_am_i(), i, NS(file->basedir), NS(file->dirname),
1494                         NS(file->basename), (int) file->mode,
1495                         (double) file->length, uidbuf, gidbuf);
1496         }
1497 }
1498
1499
1500 enum fnc_state { fnc_DIR, fnc_SLASH, fnc_BASE };
1501
1502 /* Compare the names of two file_struct entities, just like strcmp()
1503  * would do if it were operating on the joined strings.  We assume
1504  * that there are no 0-length strings.
1505  */
1506 int f_name_cmp(struct file_struct *f1, struct file_struct *f2)
1507 {
1508         int dif;
1509         const uchar *c1, *c2;
1510         enum fnc_state state1, state2;
1511
1512         if (!f1 || !f1->basename) {
1513                 if (!f2 || !f2->basename)
1514                         return 0;
1515                 return -1;
1516         }
1517         if (!f2 || !f2->basename)
1518                 return 1;
1519
1520         if (!(c1 = (uchar*)f1->dirname)) {
1521                 state1 = fnc_BASE;
1522                 c1 = (uchar*)f1->basename;
1523         } else if (!*c1) {
1524                 state1 = fnc_SLASH;
1525                 c1 = (uchar*)"/";
1526         } else
1527                 state1 = fnc_DIR;
1528         if (!(c2 = (uchar*)f2->dirname)) {
1529                 state2 = fnc_BASE;
1530                 c2 = (uchar*)f2->basename;
1531         } else if (!*c2) {
1532                 state2 = fnc_SLASH;
1533                 c2 = (uchar*)"/";
1534         } else
1535                 state2 = fnc_DIR;
1536
1537         while (1) {
1538                 if ((dif = (int)*c1 - (int)*c2) != 0)
1539                         break;
1540                 if (!*++c1) {
1541                         switch (state1) {
1542                         case fnc_DIR:
1543                                 state1 = fnc_SLASH;
1544                                 c1 = (uchar*)"/";
1545                                 break;
1546                         case fnc_SLASH:
1547                                 state1 = fnc_BASE;
1548                                 c1 = (uchar*)f1->basename;
1549                                 break;
1550                         case fnc_BASE:
1551                                 break;
1552                         }
1553                 }
1554                 if (!*++c2) {
1555                         switch (state2) {
1556                         case fnc_DIR:
1557                                 state2 = fnc_SLASH;
1558                                 c2 = (uchar*)"/";
1559                                 break;
1560                         case fnc_SLASH:
1561                                 state2 = fnc_BASE;
1562                                 c2 = (uchar*)f2->basename;
1563                                 break;
1564                         case fnc_BASE:
1565                                 if (!*c1)
1566                                         return 0;
1567                                 break;
1568                         }
1569                 }
1570         }
1571
1572         return dif;
1573 }
1574
1575
1576 /* Return a copy of the full filename of a flist entry, using the indicated
1577  * buffer.  No size-checking is done because we checked the size when creating
1578  * the file_struct entry.
1579  */
1580 char *f_name_to(struct file_struct *f, char *fbuf)
1581 {
1582         if (!f || !f->basename)
1583                 return NULL;
1584
1585         if (f->dirname) {
1586                 int len = strlen(f->dirname);
1587                 memcpy(fbuf, f->dirname, len);
1588                 fbuf[len] = '/';
1589                 strcpy(fbuf + len + 1, f->basename);
1590         } else
1591                 strcpy(fbuf, f->basename);
1592         return fbuf;
1593 }
1594
1595
1596 /* Like f_name_to(), but we rotate through 5 static buffers of our own.
1597  */
1598 char *f_name(struct file_struct *f)
1599 {
1600         static char names[5][MAXPATHLEN];
1601         static unsigned int n;
1602
1603         n = (n + 1) % (sizeof names / sizeof names[0]);
1604
1605         return f_name_to(f, names[n]);
1606 }