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_server;
  35 extern int always_checksum;
  36 extern int module_id;
  37 extern int ignore_errors;
  38
  39 extern int cvs_exclude;
  40
  41 extern int recurse;
  42 extern char curr_dir[MAXPATHLEN];
  43 extern char *files_from;
  44 extern int filesfrom_fd;
  45
  46 extern int one_file_system;
  47 extern int make_backups;
  48 extern int preserve_links;
  49 extern int preserve_hard_links;
  50 extern int preserve_perms;
  51 extern int preserve_devices;
  52 extern int preserve_uid;
  53 extern int preserve_gid;
  54 extern int preserve_times;
  55 extern int relative_paths;
  56 extern int implied_dirs;
  57 extern int copy_links;
  58 extern int copy_unsafe_links;
  59 extern int protocol_version;
  60 extern int sanitize_paths;
  61
  62 extern int read_batch;
  63 extern int write_batch;
  64
  65 extern struct exclude_struct **exclude_list;
  66 extern struct exclude_struct **server_exclude_list;
  67 extern struct exclude_struct **local_exclude_list;
  68
  69 int io_error;
  70
  71 static char empty_sum[MD4_SUM_LENGTH];
  72
  73 static void clean_flist(struct file_list *flist, int strip_root, int no_dups);
  74
  75
  76 static int show_filelist_p(void)
  77 {
  78         return verbose && (recurse || files_from) && !am_server;
  79 }
  80
  81 static void start_filelist_progress(char *kind)
  82 {
  83         rprintf(FINFO, "%s ... ", kind);
  84         if ((verbose > 1) || do_progress)
  85                 rprintf(FINFO, "\n");
  86         rflush(FINFO);
  87 }
  88
  89
  90 static void emit_filelist_progress(const struct file_list *flist)
  91 {
  92         rprintf(FINFO, " %d files...\r", flist->count);
  93 }
  94
  95
  96 static void maybe_emit_filelist_progress(const struct file_list *flist)
  97 {
  98         if (do_progress && show_filelist_p() && ((flist->count % 100) == 0))
  99                 emit_filelist_progress(flist);
 100 }
 101
 102
 103 static void finish_filelist_progress(const struct file_list *flist)
 104 {
 105         if (do_progress) {
 106                 /* This overwrites the progress line */
 107                 rprintf(FINFO, "%d file%sto consider\n",
 108                         flist->count, flist->count == 1 ? " " : "s ");
 109         } else
 110                 rprintf(FINFO, "done\n");
 111 }
 112
 113 void show_flist_stats(void)
 114 {
 115         /* Nothing yet */
 116 }
 117
 118
 119 static void list_file_entry(struct file_struct *f)
 120 {
 121         char perms[11];
 122
 123         if (!f->basename)
 124                 /* this can happen if duplicate names were removed */
 125                 return;
 126
 127         permstring(perms, f->mode);
 128
 129 #if SUPPORT_LINKS
 130         if (preserve_links && S_ISLNK(f->mode)) {
 131                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
 132                         perms,
 133                         (double) f->length, timestring(f->modtime),
 134                         f_name(f), f->u.link);
 135         } else
 136 #endif
 137                 rprintf(FINFO, "%s %11.0f %s %s\n",
 138                         perms,
 139                         (double) f->length, timestring(f->modtime),
 140                         f_name(f));
 141 }
 142
 143
 144 /**
 145  * Stat either a symlink or its referent, depending on the settings of
 146  * copy_links, copy_unsafe_links, etc.
 147  *
 148  * @retval -1 on error
 149  *
 150  * @retval 0 for success
 151  *
 152  * @post If @p path is a symlink, then @p linkbuf (of size @c
 153  * MAXPATHLEN) contains the symlink target.
 154  *
 155  * @post @p buffer contains information about the link or the
 156  * referrent as appropriate, if they exist.
 157  **/
 158 int readlink_stat(const char *path, STRUCT_STAT *buffer, char *linkbuf)
 159 {
 160 #if SUPPORT_LINKS
 161         if (copy_links)
 162                 return do_stat(path, buffer);
 163         if (do_lstat(path, buffer) == -1)
 164                 return -1;
 165         if (S_ISLNK(buffer->st_mode)) {
 166                 int l = readlink((char *) path, linkbuf, MAXPATHLEN - 1);
 167                 if (l == -1)
 168                         return -1;
 169                 linkbuf[l] = 0;
 170                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 171                         if (verbose > 1) {
 172                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 173                                         path, linkbuf);
 174                         }
 175                         return do_stat(path, buffer);
 176                 }
 177         }
 178         return 0;
 179 #else
 180         return do_stat(path, buffer);
 181 #endif
 182 }
 183
 184 int link_stat(const char *path, STRUCT_STAT * buffer)
 185 {
 186 #if SUPPORT_LINKS
 187         if (copy_links)
 188                 return do_stat(path, buffer);
 189         return do_lstat(path, buffer);
 190 #else
 191         return do_stat(path, buffer);
 192 #endif
 193 }
 194
 195 /*
 196  * This function is used to check if a file should be included/excluded
 197  * from the list of files based on its name and type etc.  The value of
 198  * exclude_level is set to either SERVER_EXCLUDES or ALL_EXCLUDES.
 199  */
 200 static int check_exclude_file(char *fname, int is_dir, int exclude_level)
 201 {
 202 #if 0 /* This currently never happens, so avoid a useless compare. */
 203         if (exclude_level == NO_EXCLUDES)
 204                 return 0;
 205 #endif
 206         if (fname) {
 207                 /* never exclude '.', even if somebody does --exclude '*' */
 208                 if (fname[0] == '.' && !fname[1])
 209                         return 0;
 210                 /* Handle the -R version of the '.' dir. */
 211                 if (fname[0] == '/') {
 212                         int len = strlen(fname);
 213                         if (fname[len-1] == '.' && fname[len-2] == '/')
 214                                 return 0;
 215                 }
 216         }
 217         if (server_exclude_list
 218          && check_exclude(server_exclude_list, fname, is_dir))
 219                 return 1;
 220         if (exclude_level != ALL_EXCLUDES)
 221                 return 0;
 222         if (exclude_list && check_exclude(exclude_list, fname, is_dir))
 223                 return 1;
 224         if (local_exclude_list
 225          && check_exclude(local_exclude_list, fname, is_dir))
 226                 return 1;
 227         return 0;
 228 }
 229
 230 /* used by the one_file_system code */
 231 static dev_t filesystem_dev;
 232
 233 static void set_filesystem(char *fname)
 234 {
 235         STRUCT_STAT st;
 236         if (link_stat(fname, &st) != 0)
 237                 return;
 238         filesystem_dev = st.st_dev;
 239 }
 240
 241
 242 static int to_wire_mode(mode_t mode)
 243 {
 244 #if SUPPORT_LINKS
 245         if (S_ISLNK(mode) && (_S_IFLNK != 0120000))
 246                 return (mode & ~(_S_IFMT)) | 0120000;
 247 #endif
 248         return (int) mode;
 249 }
 250
 251 static mode_t from_wire_mode(int mode)
 252 {
 253         if ((mode & (_S_IFMT)) == 0120000 && (_S_IFLNK != 0120000))
 254                 return (mode & ~(_S_IFMT)) | _S_IFLNK;
 255         return (mode_t) mode;
 256 }
 257
 258
 259 static void send_directory(int f, struct file_list *flist, char *dir);
 260
 261 static char *flist_dir;
 262 static int flist_dir_len;
 263
 264
 265 /**
 266  * Make sure @p flist is big enough to hold at least @p flist->count
 267  * entries.
 268  **/
 269 static void flist_expand(struct file_list *flist)
 270 {
 271         if (flist->count >= flist->malloced) {
 272                 void *new_ptr;
 273
 274                 if (flist->malloced < 1000)
 275                         flist->malloced += 1000;
 276                 else
 277                         flist->malloced *= 2;
 278
 279                 if (flist->files) {
 280                         new_ptr = realloc_array(flist->files,
 281                                                 struct file_struct *,
 282                                                 flist->malloced);
 283                 } else {
 284                         new_ptr = new_array(struct file_struct *,
 285                                             flist->malloced);
 286                 }
 287
 288                 if (verbose >= 2) {
 289                         rprintf(FINFO, "[%s] expand file_list to %.0f bytes, did%s move\n",
 290                                 who_am_i(),
 291                                 (double)sizeof(flist->files[0])
 292                                 * flist->malloced,
 293                                 (new_ptr == flist->files) ? " not" : "");
 294                 }
 295
 296                 flist->files = (struct file_struct **) new_ptr;
 297
 298                 if (!flist->files)
 299                         out_of_memory("flist_expand");
 300         }
 301 }
 302
 303 void send_file_entry(struct file_struct *file, int f, unsigned short base_flags)
 304 {
 305         unsigned short flags;
 306         static time_t modtime;
 307         static mode_t mode;
 308         static DEV64_T rdev, rdev_high;
 309         static DEV64_T dev;
 310         static uid_t uid;
 311         static gid_t gid;
 312         static char lastname[MAXPATHLEN];
 313         char *fname, fbuf[MAXPATHLEN];
 314         int l1, l2;
 315
 316         if (f == -1)
 317                 return;
 318
 319         if (!file) {
 320                 write_byte(f, 0);
 321                 modtime = 0, mode = 0;
 322                 rdev = 0, rdev_high = 0, dev = 0;
 323                 uid = 0, gid = 0;
 324                 *lastname = '\0';
 325                 return;
 326         }
 327
 328         io_write_phase = "send_file_entry";
 329
 330         fname = f_name_to(file, fbuf);
 331
 332         flags = base_flags;
 333
 334         if (file->mode == mode)
 335                 flags |= XMIT_SAME_MODE;
 336         else
 337                 mode = file->mode;
 338         if (preserve_devices) {
 339                 if (protocol_version < 28) {
 340                         if (IS_DEVICE(mode)) {
 341                                 if (file->u.rdev == rdev) {
 342                                         /* Set both flags to simplify the test
 343                                          * when writing the data. */
 344                                         flags |= XMIT_SAME_RDEV_pre28
 345                                                | XMIT_SAME_HIGH_RDEV;
 346                                 } else
 347                                         rdev = file->u.rdev;
 348                         } else
 349                                 rdev = 0;
 350                 } else if (IS_DEVICE(mode)) {
 351                         if ((file->u.rdev & ~0xFF) == rdev_high)
 352                                 flags |= XMIT_SAME_HIGH_RDEV;
 353                         else {
 354                                 rdev = file->u.rdev;
 355                                 rdev_high = rdev & ~0xFF;
 356                         }
 357                 }
 358         }
 359         if (file->uid == uid)
 360                 flags |= XMIT_SAME_UID;
 361         else
 362                 uid = file->uid;
 363         if (file->gid == gid)
 364                 flags |= XMIT_SAME_GID;
 365         else
 366                 gid = file->gid;
 367         if (file->modtime == modtime)
 368                 flags |= XMIT_SAME_TIME;
 369         else
 370                 modtime = file->modtime;
 371
 372 #if SUPPORT_HARD_LINKS
 373         if (file->link_u.idev) {
 374                 if (file->F_DEV == dev) {
 375                         if (protocol_version >= 28)
 376                                 flags |= XMIT_SAME_DEV;
 377                 } else
 378                         dev = file->F_DEV;
 379                 flags |= XMIT_HAS_IDEV_DATA;
 380         }
 381 #endif
 382
 383         for (l1 = 0;
 384              lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 385              l1++) {}
 386         l2 = strlen(fname+l1);
 387
 388         if (l1 > 0)
 389                 flags |= XMIT_SAME_NAME;
 390         if (l2 > 255)
 391                 flags |= XMIT_LONG_NAME;
 392
 393         /* We must make sure we don't send a zero flag byte or the
 394          * other end will terminate the flist transfer.  Note that
 395          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 396          * it's harmless way to add a bit to the first flag byte. */
 397         if (protocol_version >= 28) {
 398                 if (!flags && !S_ISDIR(mode))
 399                         flags |= XMIT_TOP_DIR;
 400                 if ((flags & 0xFF00) || !flags) {
 401                         flags |= XMIT_EXTENDED_FLAGS;
 402                         write_byte(f, flags);
 403                         write_byte(f, flags >> 8);
 404                 } else
 405                         write_byte(f, flags);
 406         } else {
 407                 if (!(flags & 0xFF) && !S_ISDIR(mode))
 408                         flags |= XMIT_TOP_DIR;
 409                 if (!(flags & 0xFF))
 410                         flags |= XMIT_LONG_NAME;
 411                 write_byte(f, flags);
 412         }
 413         if (flags & XMIT_SAME_NAME)
 414                 write_byte(f, l1);
 415         if (flags & XMIT_LONG_NAME)
 416                 write_int(f, l2);
 417         else
 418                 write_byte(f, l2);
 419         write_buf(f, fname + l1, l2);
 420
 421         write_longint(f, file->length);
 422         if (!(flags & XMIT_SAME_TIME))
 423                 write_int(f, modtime);
 424         if (!(flags & XMIT_SAME_MODE))
 425                 write_int(f, to_wire_mode(mode));
 426         if (preserve_uid && !(flags & XMIT_SAME_UID)) {
 427                 add_uid(uid);
 428                 write_int(f, uid);
 429         }
 430         if (preserve_gid && !(flags & XMIT_SAME_GID)) {
 431                 add_gid(gid);
 432                 write_int(f, gid);
 433         }
 434         if (preserve_devices && IS_DEVICE(mode)) {
 435                 /* If XMIT_SAME_HIGH_RDEV is off, XMIT_SAME_RDEV_pre28 is
 436                  * also off. */
 437                 if (!(flags & XMIT_SAME_HIGH_RDEV))
 438                         write_int(f, rdev);
 439                 else if (protocol_version >= 28)
 440                         write_byte(f, rdev);
 441         }
 442
 443 #if SUPPORT_LINKS
 444         if (preserve_links && S_ISLNK(mode)) {
 445                 int len = strlen(file->u.link);
 446                 write_int(f, len);
 447                 write_buf(f, file->u.link, len);
 448         }
 449 #endif
 450
 451 #if SUPPORT_HARD_LINKS
 452         if (flags & XMIT_HAS_IDEV_DATA) {
 453                 if (protocol_version < 26) {
 454                         /* 32-bit dev_t and ino_t */
 455                         write_int(f, dev);
 456                         write_int(f, file->F_INODE);
 457                 } else {
 458                         /* 64-bit dev_t and ino_t */
 459                         if (!(flags & XMIT_SAME_DEV))
 460                                 write_longint(f, dev);
 461                         write_longint(f, file->F_INODE);
 462                 }
 463         }
 464 #endif
 465
 466         if (always_checksum) {
 467                 char *sum;
 468                 if (S_ISREG(mode))
 469                         sum = file->u.sum;
 470                 else if (protocol_version < 28) {
 471                         /* Prior to 28, we sent a useless set of nulls. */
 472                         sum = empty_sum;
 473                 } else
 474                         sum = NULL;
 475                 if (sum) {
 476                         write_buf(f, sum, protocol_version < 21? 2
 477                                                         : MD4_SUM_LENGTH);
 478                 }
 479         }
 480
 481         strlcpy(lastname, fname, MAXPATHLEN);
 482
 483         io_write_phase = "unknown";
 484 }
 485
 486
 487
 488 void receive_file_entry(struct file_struct **fptr, unsigned short flags, int f)
 489 {
 490         static time_t modtime;
 491         static mode_t mode;
 492         static DEV64_T rdev, rdev_high;
 493         static DEV64_T dev;
 494         static uid_t uid;
 495         static gid_t gid;
 496         static char lastname[MAXPATHLEN], *lastdir;
 497         static int lastdir_len = -1;
 498         char thisname[MAXPATHLEN];
 499         unsigned int l1 = 0, l2 = 0;
 500         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
 501         int idev_len, idev_pad;
 502         OFF_T file_length;
 503         char *basename, *dirname, *bp;
 504         struct file_struct *file;
 505
 506         if (!fptr) {
 507                 modtime = 0, mode = 0;
 508                 rdev = 0, rdev_high = 0, dev = 0;
 509                 uid = 0, gid = 0;
 510                 *lastname = '\0';
 511                 return;
 512         }
 513
 514         if (flags & XMIT_SAME_NAME)
 515                 l1 = read_byte(f);
 516
 517         if (flags & XMIT_LONG_NAME)
 518                 l2 = read_int(f);
 519         else
 520                 l2 = read_byte(f);
 521
 522         if (l2 >= MAXPATHLEN - l1) {
 523                 rprintf(FERROR,
 524                         "overflow: flags=0x%x l1=%d l2=%d lastname=%s\n",
 525                         flags, l1, l2, lastname);
 526                 overflow("receive_file_entry");
 527         }
 528
 529         strlcpy(thisname, lastname, l1 + 1);
 530         read_sbuf(f, &thisname[l1], l2);
 531         thisname[l1 + l2] = 0;
 532
 533         strlcpy(lastname, thisname, MAXPATHLEN);
 534
 535         clean_fname(thisname);
 536
 537         if (sanitize_paths)
 538                 sanitize_path(thisname, NULL);
 539
 540         if ((basename = strrchr(thisname, '/')) != NULL) {
 541                 dirname_len = ++basename - thisname; /* counts future '\0' */
 542                 if (lastdir_len == dirname_len - 1
 543                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
 544                         dirname = lastdir;
 545                         dirname_len = 0; /* indicates no copy is needed */
 546                 } else
 547                         dirname = thisname;
 548         } else {
 549                 basename = thisname;
 550                 dirname = NULL;
 551                 dirname_len = 0;
 552         }
 553         basename_len = strlen(basename) + 1; /* count the '\0' */
 554
 555         file_length = read_longint(f);
 556         if (!(flags & XMIT_SAME_TIME))
 557                 modtime = (time_t)read_int(f);
 558         if (!(flags & XMIT_SAME_MODE))
 559                 mode = from_wire_mode(read_int(f));
 560
 561         if (preserve_uid && !(flags & XMIT_SAME_UID))
 562                 uid = (uid_t)read_int(f);
 563         if (preserve_gid && !(flags & XMIT_SAME_GID))
 564                 gid = (gid_t)read_int(f);
 565
 566         if (preserve_devices) {
 567                 if (protocol_version < 28) {
 568                         if (IS_DEVICE(mode)) {
 569                                 if (!(flags & XMIT_SAME_RDEV_pre28))
 570                                         rdev = (DEV64_T)read_int(f);
 571                         } else
 572                                 rdev = 0;
 573                 } else if (IS_DEVICE(mode)) {
 574                         if (!(flags & XMIT_SAME_HIGH_RDEV)) {
 575                                 rdev = (DEV64_T)read_int(f);
 576                                 rdev_high = rdev & ~0xFF;
 577                         } else
 578                                 rdev = rdev_high | (DEV64_T)read_byte(f);
 579                 }
 580         }
 581
 582 #if SUPPORT_LINKS
 583         if (preserve_links && S_ISLNK(mode)) {
 584                 linkname_len = read_int(f) + 1; /* count the '\0' */
 585                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 586                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 587                                 linkname_len - 1);
 588                         overflow("receive_file_entry");
 589                 }
 590         }
 591         else
 592 #endif
 593                 linkname_len = 0;
 594
 595 #if SUPPORT_HARD_LINKS
 596         if (preserve_hard_links && protocol_version < 28 && S_ISREG(mode))
 597                 flags |= XMIT_HAS_IDEV_DATA;
 598         if (flags & XMIT_HAS_IDEV_DATA)
 599                 idev_len = sizeof (struct idev);
 600         else
 601 #endif
 602                 idev_len = 0;
 603
 604         sum_len = always_checksum && S_ISREG(mode) ? MD4_SUM_LENGTH : 0;
 605
 606         alloc_len = sizeof file[0] + dirname_len + basename_len
 607                   + linkname_len + sum_len;
 608         if (idev_len) {
 609                 idev_pad = (4 - (alloc_len % 4)) % 4;
 610                 alloc_len += idev_pad + idev_len;
 611         } else
 612                 idev_pad = 0;
 613         if (!(bp = new_array(char, alloc_len)))
 614                 out_of_memory("receive_file_entry");
 615         file = *fptr = (struct file_struct *)bp;
 616         memset(bp, 0, sizeof file[0]);
 617         bp += sizeof file[0];
 618
 619         file->flags = flags & XMIT_TOP_DIR ? FLAG_TOP_DIR : 0;
 620         file->modtime = modtime;
 621         file->length = file_length;
 622         file->mode = mode;
 623         file->uid = uid;
 624         file->gid = gid;
 625
 626         if (dirname_len) {
 627                 file->dirname = lastdir = bp;
 628                 lastdir_len = dirname_len - 1;
 629                 memcpy(bp, dirname, dirname_len - 1);
 630                 bp += dirname_len;
 631                 bp[-1] = '\0';
 632         } else if (dirname)
 633                 file->dirname = dirname;
 634
 635         file->basename = bp;
 636         memcpy(bp, basename, basename_len);
 637         bp += basename_len;
 638
 639         if (preserve_devices && IS_DEVICE(mode))
 640                 file->u.rdev = rdev;
 641
 642 #if SUPPORT_LINKS
 643         if (linkname_len) {
 644                 file->u.link = bp;
 645                 read_sbuf(f, bp, linkname_len - 1);
 646                 if (sanitize_paths)
 647                         sanitize_path(bp, lastdir);
 648                 bp += linkname_len;
 649         }
 650 #endif
 651
 652 #if SUPPORT_HARD_LINKS
 653         if (idev_len) {
 654                 file->link_u.idev = (struct idev *)(bp + idev_pad);
 655                 bp += idev_pad + idev_len;
 656                 if (protocol_version < 26) {
 657                         dev = read_int(f);
 658                         file->F_INODE = read_int(f);
 659                 } else {
 660                         if (!(flags & XMIT_SAME_DEV))
 661                                 dev = read_longint(f);
 662                         file->F_INODE = read_longint(f);
 663                 }
 664                 file->F_DEV = dev;
 665         }
 666 #endif
 667
 668         if (always_checksum) {
 669                 char *sum;
 670                 if (sum_len) {
 671                         file->u.sum = sum = bp;
 672                         /*bp += sum_len;*/
 673                 } else if (protocol_version < 28) {
 674                         /* Prior to 28, we get a useless set of nulls. */
 675                         sum = empty_sum;
 676                 } else
 677                         sum = NULL;
 678                 if (sum) {
 679                         read_buf(f, sum, protocol_version < 21? 2
 680                                                 : MD4_SUM_LENGTH);
 681                 }
 682         }
 683
 684         if (!preserve_perms) {
 685                 extern int orig_umask;
 686                 /* set an appropriate set of permissions based on original
 687                  * permissions and umask. This emulates what GNU cp does */
 688                 file->mode &= ~orig_umask;
 689         }
 690 }
 691
 692
 693 /**
 694  * Create a file_struct for a named file by reading its stat()
 695  * information and performing extensive checks against global
 696  * options.
 697  *
 698  * @return the new file, or NULL if there was an error or this file
 699  * should be excluded.
 700  *
 701  * @todo There is a small optimization opportunity here to avoid
 702  * stat()ing the file in some circumstances, which has a certain cost.
 703  * We are called immediately after doing readdir(), and so we may
 704  * already know the d_type of the file.  We could for example avoid
 705  * statting directories if we're not recursing, but this is not a very
 706  * important case.  Some systems may not have d_type.
 707  **/
 708 struct file_struct *make_file(char *fname, int exclude_level)
 709 {
 710         static char *lastdir;
 711         static int lastdir_len = -1;
 712         struct file_struct *file;
 713         STRUCT_STAT st;
 714         char sum[SUM_LENGTH];
 715         char thisname[MAXPATHLEN];
 716         char linkname[MAXPATHLEN];
 717         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
 718         int idev_len, idev_pad;
 719         char *basename, *dirname, *bp;
 720         unsigned short flags = 0;
 721
 722         if (strlcpy(thisname, fname, sizeof thisname)
 723             >= sizeof thisname - flist_dir_len) {
 724                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
 725                 return NULL;
 726         }
 727         clean_fname(thisname);
 728         if (sanitize_paths)
 729                 sanitize_path(thisname, NULL);
 730
 731         memset(sum, 0, SUM_LENGTH);
 732
 733         if (readlink_stat(thisname, &st, linkname) != 0) {
 734                 int save_errno = errno;
 735                 if (errno == ENOENT && exclude_level != NO_EXCLUDES) {
 736                         /* either symlink pointing nowhere or file that
 737                          * was removed during rsync run; see if excluded
 738                          * before reporting an error */
 739                         if (check_exclude_file(thisname, 0, exclude_level)) {
 740                                 /* file is excluded anyway, ignore silently */
 741                                 return NULL;
 742                         }
 743                 }
 744                 io_error |= IOERR_GENERAL;
 745                 rprintf(FERROR, "readlink %s failed: %s\n",
 746                         full_fname(thisname), strerror(save_errno));
 747                 return NULL;
 748         }
 749
 750         /* backup.c calls us with exclude_level set to NO_EXCLUDES. */
 751         if (exclude_level == NO_EXCLUDES)
 752                 goto skip_excludes;
 753
 754         if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
 755                 rprintf(FINFO, "skipping directory %s\n", thisname);
 756                 return NULL;
 757         }
 758
 759         if (one_file_system && st.st_dev != filesystem_dev) {
 760                 /* We allow a directory though to preserve the mount point.
 761                  * However, flag it so that we don't recurse. */
 762                 if (!S_ISDIR(st.st_mode))
 763                         return NULL;
 764                 flags |= FLAG_MOUNT_POINT;
 765         }
 766
 767         if (check_exclude_file(thisname, S_ISDIR(st.st_mode) != 0, exclude_level))
 768                 return NULL;
 769
 770         if (lp_ignore_nonreadable(module_id) && access(thisname, R_OK) != 0)
 771                 return NULL;
 772
 773       skip_excludes:
 774
 775         if (verbose > 2) {
 776                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
 777                         who_am_i(), thisname, exclude_level);
 778         }
 779
 780         if ((basename = strrchr(thisname, '/')) != NULL) {
 781                 dirname_len = ++basename - thisname; /* counts future '\0' */
 782                 if (lastdir_len == dirname_len - 1
 783                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
 784                         dirname = lastdir;
 785                         dirname_len = 0; /* indicates no copy is needed */
 786                 } else
 787                         dirname = thisname;
 788         } else {
 789                 basename = thisname;
 790                 dirname = NULL;
 791                 dirname_len = 0;
 792         }
 793         basename_len = strlen(basename) + 1; /* count the '\0' */
 794
 795 #if SUPPORT_LINKS
 796         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
 797 #else
 798         linkname_len = 0;
 799 #endif
 800
 801 #if SUPPORT_HARD_LINKS
 802         if (preserve_hard_links) {
 803                 idev_len = (protocol_version < 28 ? S_ISREG(st.st_mode)
 804                           : !S_ISDIR(st.st_mode) && st.st_nlink > 1)
 805                          ? sizeof (struct idev) : 0;
 806         } else
 807 #endif
 808                 idev_len = 0;
 809
 810         sum_len = always_checksum && S_ISREG(st.st_mode) ? MD4_SUM_LENGTH : 0;
 811
 812         alloc_len = sizeof file[0] + dirname_len + basename_len
 813                   + linkname_len + sum_len;
 814         if (idev_len) {
 815                 idev_pad = (4 - (alloc_len % 4)) % 4;
 816                 alloc_len += idev_pad + idev_len;
 817         } else
 818                 idev_pad = 0;
 819         if (!(bp = new_array(char, alloc_len)))
 820                 out_of_memory("receive_file_entry");
 821         file = (struct file_struct *)bp;
 822         memset(bp, 0, sizeof file[0]);
 823         bp += sizeof file[0];
 824
 825         file->flags = flags;
 826         file->modtime = st.st_mtime;
 827         file->length = st.st_size;
 828         file->mode = st.st_mode;
 829         file->uid = st.st_uid;
 830         file->gid = st.st_gid;
 831
 832         if (dirname_len) {
 833                 file->dirname = lastdir = bp;
 834                 lastdir_len = dirname_len - 1;
 835                 memcpy(bp, dirname, dirname_len - 1);
 836                 bp += dirname_len;
 837                 bp[-1] = '\0';
 838         } else if (dirname)
 839                 file->dirname = dirname;
 840
 841         file->basename = bp;
 842         memcpy(bp, basename, basename_len);
 843         bp += basename_len;
 844
 845 #ifdef HAVE_STRUCT_STAT_ST_RDEV
 846         if (preserve_devices && IS_DEVICE(st.st_mode))
 847                 file->u.rdev = st.st_rdev;
 848 #endif
 849
 850 #if SUPPORT_LINKS
 851         if (linkname_len) {
 852                 file->u.link = bp;
 853                 memcpy(bp, linkname, linkname_len);
 854                 bp += linkname_len;
 855         }
 856 #endif
 857
 858 #if SUPPORT_HARD_LINKS
 859         if (idev_len) {
 860                 file->link_u.idev = (struct idev *)(bp + idev_pad);
 861                 bp += idev_pad + idev_len;
 862                 file->F_DEV = st.st_dev;
 863                 file->F_INODE = st.st_ino;
 864         }
 865 #endif
 866
 867         if (sum_len) {
 868                 file->u.sum = bp;
 869                 file_checksum(thisname, bp, st.st_size);
 870                 /*bp += sum_len;*/
 871         }
 872
 873         file->basedir = flist_dir;
 874
 875         if (!S_ISDIR(st.st_mode))
 876                 stats.total_size += st.st_size;
 877
 878         return file;
 879 }
 880
 881
 882 void send_file_name(int f, struct file_list *flist, char *fname,
 883                     int recursive, unsigned short base_flags)
 884 {
 885         struct file_struct *file;
 886         char fbuf[MAXPATHLEN];
 887         extern int delete_excluded;
 888
 889         /* f is set to -1 when calculating deletion file list */
 890         file = make_file(fname,
 891                          f == -1 && delete_excluded? SERVER_EXCLUDES
 892                                                    : ALL_EXCLUDES);
 893
 894         if (!file)
 895                 return;
 896
 897         maybe_emit_filelist_progress(flist);
 898
 899         flist_expand(flist);
 900
 901         if (write_batch)
 902                 file->flags |= FLAG_TOP_DIR;
 903
 904         if (file->basename[0]) {
 905                 flist->files[flist->count++] = file;
 906                 send_file_entry(file, f, base_flags);
 907         }
 908
 909         if (recursive && S_ISDIR(file->mode)
 910             && !(file->flags & FLAG_MOUNT_POINT)) {
 911                 struct exclude_struct **last_exclude_list = local_exclude_list;
 912                 send_directory(f, flist, f_name_to(file, fbuf));
 913                 local_exclude_list = last_exclude_list;
 914                 return;
 915         }
 916 }
 917
 918
 919 static void send_directory(int f, struct file_list *flist, char *dir)
 920 {
 921         DIR *d;
 922         struct dirent *di;
 923         char fname[MAXPATHLEN];
 924         unsigned int offset;
 925         char *p;
 926
 927         d = opendir(dir);
 928         if (!d) {
 929                 io_error |= IOERR_GENERAL;
 930                 rprintf(FERROR, "opendir %s failed: %s\n",
 931                         full_fname(dir), strerror(errno));
 932                 return;
 933         }
 934
 935         offset = strlcpy(fname, dir, MAXPATHLEN);
 936         p = fname + offset;
 937         if (offset >= MAXPATHLEN || p[-1] != '/') {
 938                 if (offset >= MAXPATHLEN - 1) {
 939                         io_error |= IOERR_GENERAL;
 940                         rprintf(FERROR, "skipping long-named directory: %s\n",
 941                                 full_fname(fname));
 942                         closedir(d);
 943                         return;
 944                 }
 945                 *p++ = '/';
 946                 offset++;
 947         }
 948
 949         local_exclude_list = NULL;
 950
 951         if (cvs_exclude) {
 952                 if (strlcpy(p, ".cvsignore", MAXPATHLEN - offset)
 953                     < MAXPATHLEN - offset)
 954                         add_exclude_file(&local_exclude_list,fname,MISSING_OK,ADD_EXCLUDE);
 955                 else {
 956                         io_error |= IOERR_GENERAL;
 957                         rprintf(FINFO,
 958                                 "cannot cvs-exclude in long-named directory %s\n",
 959                                 full_fname(fname));
 960                 }
 961         }
 962
 963         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
 964                 char *dname = d_name(di);
 965                 if (dname[0] == '.' && (dname[1] == '\0'
 966                     || (dname[1] == '.' && dname[2] == '\0')))
 967                         continue;
 968                 if (strlcpy(p, dname, MAXPATHLEN - offset) < MAXPATHLEN - offset)
 969                         send_file_name(f, flist, fname, recurse, 0);
 970                 else {
 971                         io_error |= IOERR_GENERAL;
 972                         rprintf(FINFO,
 973                                 "cannot send long-named file %s\n",
 974                                 full_fname(fname));
 975                 }
 976         }
 977         if (errno) {
 978                 io_error |= IOERR_GENERAL;
 979                 rprintf(FERROR, "readdir(%s): (%d) %s\n",
 980                         dir, errno, strerror(errno));
 981         }
 982
 983         if (local_exclude_list)
 984                 free_exclude_list(&local_exclude_list); /* Zeros pointer too */
 985
 986         closedir(d);
 987 }
 988
 989
 990 /**
 991  * The delete_files() function in receiver.c sets f to -1 so that we just
 992  * construct the file list in memory without sending it over the wire.  It
 993  * also has the side-effect of ignoring user-excludes if delete_excluded
 994  * is set (so that the delete list includes user-excluded files).
 995  **/
 996 struct file_list *send_file_list(int f, int argc, char *argv[])
 997 {
 998         int l;
 999         STRUCT_STAT st;
1000         char *p, *dir, olddir[sizeof curr_dir];
1001         char lastpath[MAXPATHLEN] = "";
1002         struct file_list *flist;
1003         int64 start_write;
1004         int use_ff_fd = 0;
1005
1006         if (show_filelist_p() && f != -1)
1007                 start_filelist_progress("building file list");
1008
1009         start_write = stats.total_written;
1010
1011         flist = flist_new();
1012
1013         if (f != -1) {
1014                 io_start_buffering_out(f);
1015                 if (filesfrom_fd >= 0) {
1016                         if (argv[0] && !push_dir(argv[0])) {
1017                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1018                                         full_fname(argv[0]), strerror(errno));
1019                                 exit_cleanup(RERR_FILESELECT);
1020                         }
1021                         use_ff_fd = 1;
1022                 }
1023         }
1024
1025         while (1) {
1026                 char fname2[MAXPATHLEN];
1027                 char *fname = fname2;
1028
1029                 if (use_ff_fd) {
1030                         if (read_filesfrom_line(filesfrom_fd, fname) == 0)
1031                                 break;
1032                         sanitize_path(fname, NULL);
1033                 } else {
1034                         if (argc-- == 0)
1035                                 break;
1036                         strlcpy(fname, *argv++, MAXPATHLEN);
1037                         if (sanitize_paths)
1038                                 sanitize_path(fname, NULL);
1039                 }
1040
1041                 l = strlen(fname);
1042                 if (fname[l - 1] == '/') {
1043                         if (l == 2 && fname[0] == '.') {
1044                                 /* Turn "./" into just "." rather than "./." */
1045                                 fname[1] = '\0';
1046                         } else if (l < MAXPATHLEN) {
1047                                 fname[l++] = '.';
1048                                 fname[l] = '\0';
1049                         }
1050                 }
1051
1052                 if (link_stat(fname, &st) != 0) {
1053                         if (f != -1) {
1054                                 io_error |= IOERR_GENERAL;
1055                                 rprintf(FERROR, "link_stat %s failed: %s\n",
1056                                         full_fname(fname), strerror(errno));
1057                         }
1058                         continue;
1059                 }
1060
1061                 if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
1062                         rprintf(FINFO, "skipping directory %s\n", fname);
1063                         continue;
1064                 }
1065
1066                 dir = NULL;
1067                 olddir[0] = '\0';
1068
1069                 if (!relative_paths) {
1070                         p = strrchr(fname, '/');
1071                         if (p) {
1072                                 *p = 0;
1073                                 if (p == fname)
1074                                         dir = "/";
1075                                 else
1076                                         dir = fname;
1077                                 fname = p + 1;
1078                         }
1079                 } else if (f != -1 && implied_dirs && (p=strrchr(fname,'/')) && p != fname) {
1080                         /* this ensures we send the intermediate directories,
1081                            thus getting their permissions right */
1082                         char *lp = lastpath, *fn = fname, *slash = fname;
1083                         *p = 0;
1084                         /* Skip any initial directories in our path that we
1085                          * have in common with lastpath. */
1086                         while (*fn && *lp == *fn) {
1087                                 if (*fn == '/')
1088                                         slash = fn;
1089                                 lp++, fn++;
1090                         }
1091                         *p = '/';
1092                         if (fn != p || (*lp && *lp != '/')) {
1093                                 int copy_links_saved = copy_links;
1094                                 int recurse_saved = recurse;
1095                                 copy_links = copy_unsafe_links;
1096                                 /* set recurse to 1 to prevent make_file
1097                                  * from ignoring directory, but still
1098                                  * turn off the recursive parameter to
1099                                  * send_file_name */
1100                                 recurse = 1;
1101                                 while ((slash = strchr(slash+1, '/')) != 0) {
1102                                         *slash = 0;
1103                                         send_file_name(f, flist, fname, 0, 0);
1104                                         *slash = '/';
1105                                 }
1106                                 copy_links = copy_links_saved;
1107                                 recurse = recurse_saved;
1108                                 *p = 0;
1109                                 strlcpy(lastpath, fname, sizeof lastpath);
1110                                 *p = '/';
1111                         }
1112                 }
1113
1114                 if (!*fname)
1115                         fname = ".";
1116
1117                 if (dir && *dir) {
1118                         static char *lastdir;
1119                         static int lastdir_len;
1120
1121                         strcpy(olddir, curr_dir); /* can't overflow */
1122
1123                         if (!push_dir(dir)) {
1124                                 io_error |= IOERR_GENERAL;
1125                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1126                                         full_fname(dir), strerror(errno));
1127                                 continue;
1128                         }
1129
1130                         if (lastdir && strcmp(lastdir, dir) == 0) {
1131                                 flist_dir = lastdir;
1132                                 flist_dir_len = lastdir_len;
1133                         } else {
1134                                 flist_dir = lastdir = strdup(dir);
1135                                 flist_dir_len = lastdir_len = strlen(dir);
1136                         }
1137                 }
1138
1139                 if (one_file_system)
1140                         set_filesystem(fname);
1141
1142                 send_file_name(f, flist, fname, recurse, XMIT_TOP_DIR);
1143
1144                 if (olddir[0]) {
1145                         flist_dir = NULL;
1146                         flist_dir_len = 0;
1147                         if (!pop_dir(olddir)) {
1148                                 rprintf(FERROR, "pop_dir %s failed: %s\n",
1149                                         full_fname(dir), strerror(errno));
1150                                 exit_cleanup(RERR_FILESELECT);
1151                         }
1152                 }
1153         }
1154
1155         if (f != -1) {
1156                 send_file_entry(NULL, f, 0);
1157
1158                 if (show_filelist_p())
1159                         finish_filelist_progress(flist);
1160         }
1161
1162         clean_flist(flist, 0, 0);
1163
1164         if (f != -1) {
1165                 /* Now send the uid/gid list. This was introduced in
1166                  * protocol version 15 */
1167                 send_uid_list(f);
1168
1169                 /* send the io_error flag */
1170                 write_int(f, lp_ignore_errors(module_id) ? 0 : io_error);
1171
1172                 io_end_buffering();
1173                 stats.flist_size = stats.total_written - start_write;
1174                 stats.num_files = flist->count;
1175                 if (write_batch)
1176                         write_batch_flist_info(flist->count, flist->files);
1177         }
1178
1179         if (verbose > 2)
1180                 rprintf(FINFO, "send_file_list done\n");
1181
1182         return flist;
1183 }
1184
1185
1186 struct file_list *recv_file_list(int f)
1187 {
1188         struct file_list *flist;
1189         unsigned short flags;
1190         int64 start_read;
1191         extern int list_only;
1192
1193         if (show_filelist_p())
1194                 start_filelist_progress("receiving file list");
1195
1196         start_read = stats.total_read;
1197
1198         flist = new(struct file_list);
1199         if (!flist)
1200                 goto oom;
1201
1202         flist->count = 0;
1203         flist->malloced = 1000;
1204         flist->files = new_array(struct file_struct *, flist->malloced);
1205         if (!flist->files)
1206                 goto oom;
1207
1208
1209         while ((flags = read_byte(f)) != 0) {
1210                 int i = flist->count;
1211
1212                 flist_expand(flist);
1213
1214                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
1215                         flags |= read_byte(f) << 8;
1216                 receive_file_entry(&flist->files[i], flags, f);
1217
1218                 if (S_ISREG(flist->files[i]->mode))
1219                         stats.total_size += flist->files[i]->length;
1220
1221                 flist->count++;
1222
1223                 maybe_emit_filelist_progress(flist);
1224
1225                 if (verbose > 2) {
1226                         rprintf(FINFO, "recv_file_name(%s)\n",
1227                                 f_name(flist->files[i]));
1228                 }
1229         }
1230         receive_file_entry(NULL, 0, 0); /* Signal that we're done. */
1231
1232         if (verbose > 2)
1233                 rprintf(FINFO, "received %d names\n", flist->count);
1234
1235         if (show_filelist_p())
1236                 finish_filelist_progress(flist);
1237
1238         clean_flist(flist, relative_paths, 1);
1239
1240         if (f != -1) {
1241                 /* Now send the uid/gid list. This was introduced in
1242                  * protocol version 15 */
1243                 recv_uid_list(f, flist);
1244
1245                 if (!read_batch) {
1246                         /* Recv the io_error flag */
1247                         if (lp_ignore_errors(module_id) || ignore_errors)
1248                                 read_int(f);
1249                         else
1250                                 io_error |= read_int(f);
1251                 }
1252         }
1253
1254         if (list_only) {
1255                 int i;
1256                 for (i = 0; i < flist->count; i++)
1257                         list_file_entry(flist->files[i]);
1258         }
1259
1260         if (verbose > 2)
1261                 rprintf(FINFO, "recv_file_list done\n");
1262
1263         stats.flist_size = stats.total_read - start_read;
1264         stats.num_files = flist->count;
1265
1266         return flist;
1267
1268       oom:
1269         out_of_memory("recv_file_list");
1270         return NULL;            /* not reached */
1271 }
1272
1273
1274 int file_compare(struct file_struct **file1, struct file_struct **file2)
1275 {
1276         struct file_struct *f1 = *file1;
1277         struct file_struct *f2 = *file2;
1278
1279         if (!f1->basename && !f2->basename)
1280                 return 0;
1281         if (!f1->basename)
1282                 return -1;
1283         if (!f2->basename)
1284                 return 1;
1285         if (f1->dirname == f2->dirname)
1286                 return u_strcmp(f1->basename, f2->basename);
1287         return f_name_cmp(f1, f2);
1288 }
1289
1290
1291 int flist_find(struct file_list *flist, struct file_struct *f)
1292 {
1293         int low = 0, high = flist->count - 1;
1294
1295         while (high >= 0 && !flist->files[high]->basename) high--;
1296
1297         if (high < 0)
1298                 return -1;
1299
1300         while (low != high) {
1301                 int mid = (low + high) / 2;
1302                 int ret = file_compare(&flist->files[flist_up(flist, mid)],&f);
1303                 if (ret == 0)
1304                         return flist_up(flist, mid);
1305                 if (ret > 0)
1306                         high = mid;
1307                 else
1308                         low = mid + 1;
1309         }
1310
1311         if (file_compare(&flist->files[flist_up(flist, low)], &f) == 0)
1312                 return flist_up(flist, low);
1313         return -1;
1314 }
1315
1316
1317 /*
1318  * Free up any resources a file_struct has allocated, and optionally free
1319  * it up as well.
1320  */
1321 void free_file(struct file_struct *file, int free_the_struct)
1322 {
1323         if (free_the_struct)
1324                 free(file);
1325         else
1326                 memset(file, 0, sizeof file[0]);
1327 }
1328
1329
1330 /*
1331  * allocate a new file list
1332  */
1333 struct file_list *flist_new(void)
1334 {
1335         struct file_list *flist;
1336
1337         flist = new(struct file_list);
1338         if (!flist)
1339                 out_of_memory("send_file_list");
1340
1341         flist->count = 0;
1342         flist->malloced = 0;
1343         flist->files = NULL;
1344
1345         return flist;
1346 }
1347
1348 /*
1349  * free up all elements in a flist
1350  */
1351 void flist_free(struct file_list *flist)
1352 {
1353         int i;
1354         for (i = 1; i < flist->count; i++)
1355                 free_file(flist->files[i], FREE_STRUCT);
1356         free(flist->files);
1357         free(flist);
1358 }
1359
1360
1361 /*
1362  * This routine ensures we don't have any duplicate names in our file list.
1363  * duplicate names can cause corruption because of the pipelining
1364  */
1365 static void clean_flist(struct file_list *flist, int strip_root, int no_dups)
1366 {
1367         int i, prev_i = 0;
1368
1369         if (!flist || flist->count == 0)
1370                 return;
1371
1372         qsort(flist->files, flist->count,
1373               sizeof(flist->files[0]), (int (*)()) file_compare);
1374
1375         for (i = no_dups? 0 : flist->count; i < flist->count; i++) {
1376                 if (flist->files[i]->basename) {
1377                         prev_i = i;
1378                         break;
1379                 }
1380         }
1381         while (++i < flist->count) {
1382                 if (!flist->files[i]->basename)
1383                         continue;
1384                 if (f_name_cmp(flist->files[i], flist->files[prev_i]) == 0) {
1385                         if (verbose > 1 && !am_server) {
1386                                 rprintf(FINFO,
1387                                         "removing duplicate name %s from file list %d\n",
1388                                         f_name(flist->files[i]), i);
1389                         }
1390                         /* Make sure that if we unduplicate '.', that we don't
1391                          * lose track of a user-specified starting point (or
1392                          * else deletions will mysteriously fail with -R). */
1393                         if (flist->files[i]->flags & FLAG_TOP_DIR)
1394                                 flist->files[prev_i]->flags |= FLAG_TOP_DIR;
1395                         free_file(flist->files[i], CLEAR_STRUCT);
1396                 } else
1397                         prev_i = i;
1398         }
1399
1400         if (strip_root) {
1401                 /* we need to strip off the root directory in the case
1402                    of relative paths, but this must be done _after_
1403                    the sorting phase */
1404                 for (i = 0; i < flist->count; i++) {
1405                         if (flist->files[i]->dirname &&
1406                             flist->files[i]->dirname[0] == '/') {
1407                                 memmove(&flist->files[i]->dirname[0],
1408                                         &flist->files[i]->dirname[1],
1409                                         strlen(flist->files[i]->dirname));
1410                         }
1411
1412                         if (flist->files[i]->dirname &&
1413                             !flist->files[i]->dirname[0]) {
1414                                 flist->files[i]->dirname = NULL;
1415                         }
1416                 }
1417         }
1418
1419         if (verbose <= 3)
1420                 return;
1421
1422         for (i = 0; i < flist->count; i++) {
1423                 rprintf(FINFO, "[%s] i=%d %s %s %s mode=0%o len=%.0f\n",
1424                         who_am_i(), i,
1425                         NS(flist->files[i]->basedir),
1426                         NS(flist->files[i]->dirname),
1427                         NS(flist->files[i]->basename),
1428                         (int) flist->files[i]->mode,
1429                         (double) flist->files[i]->length);
1430         }
1431 }
1432
1433
1434 enum fnc_state { fnc_DIR, fnc_SLASH, fnc_BASE };
1435
1436 /* Compare the names of two file_struct entities, just like strcmp()
1437  * would do if it were operating on the joined strings.  We assume
1438  * that there are no 0-length strings.
1439  */
1440 int f_name_cmp(struct file_struct *f1, struct file_struct *f2)
1441 {
1442         int dif;
1443         const uchar *c1, *c2;
1444         enum fnc_state state1, state2;
1445
1446         if (!f1 || !f1->basename) {
1447                 if (!f2 || !f2->basename)
1448                         return 0;
1449                 return -1;
1450         }
1451         if (!f2 || !f2->basename)
1452                 return 1;
1453
1454         if (!(c1 = (uchar*)f1->dirname)) {
1455                 state1 = fnc_BASE;
1456                 c1 = (uchar*)f1->basename;
1457         } else
1458                 state1 = fnc_DIR;
1459         if (!(c2 = (uchar*)f2->dirname)) {
1460                 state2 = fnc_BASE;
1461                 c2 = (uchar*)f2->basename;
1462         } else
1463                 state2 = fnc_DIR;
1464
1465         while (1) {
1466                 if ((dif = (int)*c1 - (int)*c2) != 0)
1467                         break;
1468                 if (!*++c1) {
1469                         switch (state1) {
1470                         case fnc_DIR:
1471                                 state1 = fnc_SLASH;
1472                                 c1 = (uchar*)"/";
1473                                 break;
1474                         case fnc_SLASH:
1475                                 state1 = fnc_BASE;
1476                                 c1 = (uchar*)f1->basename;
1477                                 break;
1478                         case fnc_BASE:
1479                                 break;
1480                         }
1481                 }
1482                 if (!*++c2) {
1483                         switch (state2) {
1484                         case fnc_DIR:
1485                                 state2 = fnc_SLASH;
1486                                 c2 = (uchar*)"/";
1487                                 break;
1488                         case fnc_SLASH:
1489                                 state2 = fnc_BASE;
1490                                 c2 = (uchar*)f2->basename;
1491                                 break;
1492                         case fnc_BASE:
1493                                 if (!*c1)
1494                                         return 0;
1495                                 break;
1496                         }
1497                 }
1498         }
1499
1500         return dif;
1501 }
1502
1503
1504 /* Return a copy of the full filename of a flist entry, using the indicated
1505  * buffer.  No size-checking is done because we checked the size when creating
1506  * the file_struct entry.
1507  */
1508 char *f_name_to(struct file_struct *f, char *fbuf)
1509 {
1510         if (!f || !f->basename)
1511                 return NULL;
1512
1513         if (f->dirname) {
1514                 int len = strlen(f->dirname);
1515                 memcpy(fbuf, f->dirname, len);
1516                 fbuf[len] = '/';
1517                 strcpy(fbuf + len + 1, f->basename);
1518         } else
1519                 strcpy(fbuf, f->basename);
1520         return fbuf;
1521 }
1522
1523
1524 /* Like f_name_to(), but we rotate through 5 static buffers of our own.
1525  */
1526 char *f_name(struct file_struct *f)
1527 {
1528         static char names[5][MAXPATHLEN];
1529         static unsigned int n;
1530
1531         n = (n + 1) % (sizeof names / sizeof names[0]);
1532
1533         return f_name_to(f, names[n]);
1534 }