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  * @todo Get rid of the string_area optimization.  Efficiently
  25  * allocating blocks is the responsibility of the system's malloc
  26  * library, not of rsync.
  27  *
  28  * @sa http://lists.samba.org/pipermail/rsync/2000-June/002351.html
  29  *
  30  **/
  31
  32 #include "rsync.h"
  33
  34 extern struct stats stats;
  35
  36 extern int verbose;
  37 extern int do_progress;
  38 extern int am_server;
  39 extern int always_checksum;
  40 extern int module_id;
  41 extern int ignore_errors;
  42
  43 extern int cvs_exclude;
  44
  45 extern int recurse;
  46 extern char curr_dir[MAXPATHLEN];
  47 extern char *files_from;
  48 extern int filesfrom_fd;
  49
  50 extern int one_file_system;
  51 extern int make_backups;
  52 extern int preserve_links;
  53 extern int preserve_hard_links;
  54 extern int preserve_perms;
  55 extern int preserve_devices;
  56 extern int preserve_uid;
  57 extern int preserve_gid;
  58 extern int preserve_times;
  59 extern int relative_paths;
  60 extern int implied_dirs;
  61 extern int copy_links;
  62 extern int copy_unsafe_links;
  63 extern int protocol_version;
  64 extern int sanitize_paths;
  65
  66 extern int read_batch;
  67 extern int write_batch;
  68
  69 extern struct exclude_struct **exclude_list;
  70 extern struct exclude_struct **server_exclude_list;
  71 extern struct exclude_struct **local_exclude_list;
  72
  73 int io_error;
  74
  75 static struct file_struct null_file;
  76 static char empty_sum[MD4_SUM_LENGTH];
  77
  78 static void clean_flist(struct file_list *flist, int strip_root, int no_dups);
  79
  80
  81 static int show_filelist_p(void)
  82 {
  83         return verbose && (recurse || files_from) && !am_server;
  84 }
  85
  86 static void start_filelist_progress(char *kind)
  87 {
  88         rprintf(FINFO, "%s ... ", kind);
  89         if ((verbose > 1) || do_progress)
  90                 rprintf(FINFO, "\n");
  91         rflush(FINFO);
  92 }
  93
  94
  95 static void emit_filelist_progress(const struct file_list *flist)
  96 {
  97         rprintf(FINFO, " %d files...\r", flist->count);
  98 }
  99
 100
 101 static void maybe_emit_filelist_progress(const struct file_list *flist)
 102 {
 103         if (do_progress && show_filelist_p() && ((flist->count % 100) == 0))
 104                 emit_filelist_progress(flist);
 105 }
 106
 107
 108 static void finish_filelist_progress(const struct file_list *flist)
 109 {
 110         if (do_progress) {
 111                 /* This overwrites the progress line */
 112                 rprintf(FINFO, "%d file%sto consider\n",
 113                         flist->count, flist->count == 1 ? " " : "s ");
 114         } else
 115                 rprintf(FINFO, "done\n");
 116 }
 117
 118 void show_flist_stats(void)
 119 {
 120         /* Nothing yet */
 121 }
 122
 123
 124 static struct string_area *string_area_new(int size)
 125 {
 126         struct string_area *a;
 127
 128         if (size <= 0)
 129                 size = ARENA_SIZE;
 130         a = new(struct string_area);
 131         if (!a)
 132                 out_of_memory("string_area_new");
 133         a->current = a->base = new_array(char, size);
 134         if (!a->current)
 135                 out_of_memory("string_area_new buffer");
 136         a->end = a->base + size;
 137         a->next = NULL;
 138
 139         return a;
 140 }
 141
 142 static void string_area_free(struct string_area *a)
 143 {
 144         struct string_area *next;
 145
 146         for (; a; a = next) {
 147                 next = a->next;
 148                 free(a->base);
 149         }
 150 }
 151
 152 static char *string_area_malloc(struct string_area **ap, int size)
 153 {
 154         char *p;
 155         struct string_area *a;
 156
 157         /* does the request fit into the current space? */
 158         a = *ap;
 159         if (a->current + size >= a->end) {
 160                 /* no; get space, move new string_area to front of the list */
 161                 a = string_area_new(size > ARENA_SIZE ? size : ARENA_SIZE);
 162                 a->next = *ap;
 163                 *ap = a;
 164         }
 165
 166         /* have space; do the "allocation." */
 167         p = a->current;
 168         a->current += size;
 169         return p;
 170 }
 171
 172 static char *string_area_strdup(struct string_area **ap, const char *src)
 173 {
 174         char *dest = string_area_malloc(ap, strlen(src) + 1);
 175         return strcpy(dest, src);
 176 }
 177
 178 static void list_file_entry(struct file_struct *f)
 179 {
 180         char perms[11];
 181
 182         if (!f->basename)
 183                 /* this can happen if duplicate names were removed */
 184                 return;
 185
 186         permstring(perms, f->mode);
 187
 188         if (preserve_links && S_ISLNK(f->mode)) {
 189                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
 190                         perms,
 191                         (double) f->length, timestring(f->modtime),
 192                         f_name(f), f->u.link);
 193         } else {
 194                 rprintf(FINFO, "%s %11.0f %s %s\n",
 195                         perms,
 196                         (double) f->length, timestring(f->modtime),
 197                         f_name(f));
 198         }
 199 }
 200
 201
 202 /**
 203  * Stat either a symlink or its referent, depending on the settings of
 204  * copy_links, copy_unsafe_links, etc.
 205  *
 206  * @retval -1 on error
 207  *
 208  * @retval 0 for success
 209  *
 210  * @post If @p path is a symlink, then @p linkbuf (of size @c
 211  * MAXPATHLEN) contains the symlink target.
 212  *
 213  * @post @p buffer contains information about the link or the
 214  * referrent as appropriate, if they exist.
 215  **/
 216 int readlink_stat(const char *path, STRUCT_STAT *buffer, char *linkbuf)
 217 {
 218 #if SUPPORT_LINKS
 219         if (copy_links)
 220                 return do_stat(path, buffer);
 221         if (do_lstat(path, buffer) == -1)
 222                 return -1;
 223         if (S_ISLNK(buffer->st_mode)) {
 224                 int l = readlink((char *) path, linkbuf, MAXPATHLEN - 1);
 225                 if (l == -1)
 226                         return -1;
 227                 linkbuf[l] = 0;
 228                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 229                         if (verbose > 1) {
 230                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 231                                         path, linkbuf);
 232                         }
 233                         return do_stat(path, buffer);
 234                 }
 235         }
 236         return 0;
 237 #else
 238         return do_stat(path, buffer);
 239 #endif
 240 }
 241
 242 int link_stat(const char *path, STRUCT_STAT * buffer)
 243 {
 244 #if SUPPORT_LINKS
 245         if (copy_links)
 246                 return do_stat(path, buffer);
 247         return do_lstat(path, buffer);
 248 #else
 249         return do_stat(path, buffer);
 250 #endif
 251 }
 252
 253 /*
 254  * This function is used to check if a file should be included/excluded
 255  * from the list of files based on its name and type etc.  The value of
 256  * exclude_level is set to either SERVER_EXCLUDES or ALL_EXCLUDES.
 257  */
 258 static int check_exclude_file(char *fname, int is_dir, int exclude_level)
 259 {
 260 #if 0 /* This currently never happens, so avoid a useless compare. */
 261         if (exclude_level == NO_EXCLUDES)
 262                 return 0;
 263 #endif
 264         if (fname) {
 265                 /* never exclude '.', even if somebody does --exclude '*' */
 266                 if (fname[0] == '.' && !fname[1])
 267                         return 0;
 268                 /* Handle the -R version of the '.' dir. */
 269                 if (fname[0] == '/') {
 270                         int len = strlen(fname);
 271                         if (fname[len-1] == '.' && fname[len-2] == '/')
 272                                 return 0;
 273                 }
 274         }
 275         if (server_exclude_list
 276          && check_exclude(server_exclude_list, fname, is_dir))
 277                 return 1;
 278         if (exclude_level != ALL_EXCLUDES)
 279                 return 0;
 280         if (exclude_list && check_exclude(exclude_list, fname, is_dir))
 281                 return 1;
 282         if (local_exclude_list
 283          && check_exclude(local_exclude_list, fname, is_dir))
 284                 return 1;
 285         return 0;
 286 }
 287
 288 /* used by the one_file_system code */
 289 static dev_t filesystem_dev;
 290
 291 static void set_filesystem(char *fname)
 292 {
 293         STRUCT_STAT st;
 294         if (link_stat(fname, &st) != 0)
 295                 return;
 296         filesystem_dev = st.st_dev;
 297 }
 298
 299
 300 static int to_wire_mode(mode_t mode)
 301 {
 302         if (S_ISLNK(mode) && (_S_IFLNK != 0120000))
 303                 return (mode & ~(_S_IFMT)) | 0120000;
 304         return (int) mode;
 305 }
 306
 307 static mode_t from_wire_mode(int mode)
 308 {
 309         if ((mode & (_S_IFMT)) == 0120000 && (_S_IFLNK != 0120000))
 310                 return (mode & ~(_S_IFMT)) | _S_IFLNK;
 311         return (mode_t) mode;
 312 }
 313
 314
 315 static void send_directory(int f, struct file_list *flist, char *dir);
 316
 317 static char *flist_dir;
 318 static int flist_dir_len;
 319
 320
 321 /**
 322  * Make sure @p flist is big enough to hold at least @p flist->count
 323  * entries.
 324  **/
 325 static void flist_expand(struct file_list *flist)
 326 {
 327         if (flist->count >= flist->malloced) {
 328                 void *new_ptr;
 329
 330                 if (flist->malloced < 1000)
 331                         flist->malloced += 1000;
 332                 else
 333                         flist->malloced *= 2;
 334
 335                 if (flist->files) {
 336                         new_ptr = realloc_array(flist->files,
 337                                                 struct file_struct *,
 338                                                 flist->malloced);
 339                 } else {
 340                         new_ptr = new_array(struct file_struct *,
 341                                             flist->malloced);
 342                 }
 343
 344                 if (verbose >= 2) {
 345                         rprintf(FINFO, "expand file_list to %.0f bytes, did%s move\n",
 346                                 (double)sizeof(flist->files[0])
 347                                 * flist->malloced,
 348                                 (new_ptr == flist->files) ? " not" : "");
 349                 }
 350
 351                 flist->files = (struct file_struct **) new_ptr;
 352
 353                 if (!flist->files)
 354                         out_of_memory("flist_expand");
 355         }
 356 }
 357
 358 void send_file_entry(struct file_struct *file, int f, unsigned short base_flags)
 359 {
 360         unsigned short flags;
 361         static time_t modtime;
 362         static mode_t mode;
 363         static DEV64_T rdev;    /* just high bytes in p28 onward */
 364         static DEV64_T dev;
 365         static uid_t uid;
 366         static gid_t gid;
 367         static char lastname[MAXPATHLEN];
 368         char *fname, fbuf[MAXPATHLEN];
 369         int l1, l2;
 370
 371         if (f == -1)
 372                 return;
 373
 374         if (!file) {
 375                 write_byte(f, 0);
 376                 modtime = 0, mode = 0;
 377                 rdev = 0, dev = 0;
 378                 uid = 0, gid = 0;
 379                 *lastname = '\0';
 380                 return;
 381         }
 382
 383         io_write_phase = "send_file_entry";
 384
 385         fname = f_name_to(file, fbuf);
 386
 387         flags = base_flags;
 388
 389         if (file->mode == mode)
 390                 flags |= XMIT_SAME_MODE;
 391         else
 392                 mode = file->mode;
 393         if (preserve_devices) {
 394                 if (protocol_version < 28) {
 395                         if (IS_DEVICE(mode)) {
 396                                 if (file->u.rdev == rdev) {
 397                                         /* Set both flags to simplify the test
 398                                          * when writing the data. */
 399                                         flags |= XMIT_SAME_RDEV_pre28
 400                                                | XMIT_SAME_HIGH_RDEV;
 401                                 } else
 402                                         rdev = file->u.rdev;
 403                         } else
 404                                 rdev = 0;
 405                 } else if (IS_DEVICE(mode)) {
 406                         if ((file->u.rdev & ~0xFF) == rdev)
 407                                 flags |= XMIT_SAME_HIGH_RDEV;
 408                         else
 409                                 rdev = file->u.rdev & ~0xFF;
 410                 }
 411         }
 412         if (file->uid == uid)
 413                 flags |= XMIT_SAME_UID;
 414         else
 415                 uid = file->uid;
 416         if (file->gid == gid)
 417                 flags |= XMIT_SAME_GID;
 418         else
 419                 gid = file->gid;
 420         if (file->modtime == modtime)
 421                 flags |= XMIT_SAME_TIME;
 422         else
 423                 modtime = file->modtime;
 424         if (file->link_u.idev) {
 425                 if (file->F_DEV == dev) {
 426                         if (protocol_version >= 28)
 427                                 flags |= XMIT_SAME_DEV;
 428                 } else
 429                         dev = file->F_DEV;
 430                 flags |= XMIT_HAS_IDEV_DATA;
 431         }
 432
 433         for (l1 = 0;
 434              lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 435              l1++) {}
 436         l2 = strlen(fname+l1);
 437
 438         if (l1 > 0)
 439                 flags |= XMIT_SAME_NAME;
 440         if (l2 > 255)
 441                 flags |= XMIT_LONG_NAME;
 442
 443         /* We must make sure we don't send a zero flags byte or
 444          * the other end will terminate the flist transfer. */
 445         if (flags == 0 && !S_ISDIR(mode))
 446                 flags |= XMIT_TOP_DIR; /* NOTE: no meaning for non-dir */
 447         if (protocol_version >= 28) {
 448                 if ((flags & 0xFF00) || flags == 0) {
 449                         flags |= XMIT_EXTENDED_FLAGS;
 450                         write_byte(f, flags);
 451                         write_byte(f, flags >> 8);
 452                 } else
 453                         write_byte(f, flags);
 454         } else {
 455                 if (flags == 0)
 456                         flags |= XMIT_LONG_NAME;
 457                 write_byte(f, flags);
 458         }
 459         if (flags & XMIT_SAME_NAME)
 460                 write_byte(f, l1);
 461         if (flags & XMIT_LONG_NAME)
 462                 write_int(f, l2);
 463         else
 464                 write_byte(f, l2);
 465         write_buf(f, fname + l1, l2);
 466
 467         write_longint(f, file->length);
 468         if (!(flags & XMIT_SAME_TIME))
 469                 write_int(f, modtime);
 470         if (!(flags & XMIT_SAME_MODE))
 471                 write_int(f, to_wire_mode(mode));
 472         if (preserve_uid && !(flags & XMIT_SAME_UID)) {
 473                 add_uid(uid);
 474                 write_int(f, uid);
 475         }
 476         if (preserve_gid && !(flags & XMIT_SAME_GID)) {
 477                 add_gid(gid);
 478                 write_int(f, gid);
 479         }
 480         if (preserve_devices && IS_DEVICE(mode)) {
 481                 /* If XMIT_SAME_HIGH_RDEV is off, XMIT_SAME_RDEV_pre28 is
 482                  * also off.  Also, avoid using "rdev" because it may be
 483                  * incomplete. */
 484                 if (!(flags & XMIT_SAME_HIGH_RDEV))
 485                         write_int(f, file->u.rdev);
 486                 else if (protocol_version >= 28)
 487                         write_byte(f, file->u.rdev);
 488         }
 489
 490 #if SUPPORT_LINKS
 491         if (preserve_links && S_ISLNK(mode)) {
 492                 write_int(f, strlen(file->u.link));
 493                 write_buf(f, file->u.link, strlen(file->u.link));
 494         }
 495 #endif
 496
 497 #if SUPPORT_HARD_LINKS
 498         if (flags & XMIT_HAS_IDEV_DATA) {
 499                 if (protocol_version < 26) {
 500                         /* 32-bit dev_t and ino_t */
 501                         write_int(f, dev);
 502                         write_int(f, file->F_INODE);
 503                 } else {
 504                         /* 64-bit dev_t and ino_t */
 505                         if (!(flags & XMIT_SAME_DEV))
 506                                 write_longint(f, dev);
 507                         write_longint(f, file->F_INODE);
 508                 }
 509         }
 510 #endif
 511
 512         if (always_checksum) {
 513                 char *sum;
 514                 if (S_ISREG(mode))
 515                         sum = file->u.sum;
 516                 else if (protocol_version < 28) {
 517                         /* Prior to 28, we sent a useless set of nulls. */
 518                         sum = empty_sum;
 519                 } else
 520                         sum = NULL;
 521                 if (sum) {
 522                         write_buf(f, sum, protocol_version < 21? 2
 523                                                         : MD4_SUM_LENGTH);
 524                 }
 525         }
 526
 527         strlcpy(lastname, fname, MAXPATHLEN);
 528
 529         io_write_phase = "unknown";
 530 }
 531
 532
 533
 534 void receive_file_entry(struct file_struct **fptr, unsigned short flags, int f)
 535 {
 536         static time_t modtime;
 537         static mode_t mode;
 538         static DEV64_T rdev;    /* just high bytes in p28 onward */
 539         static DEV64_T dev;
 540         static uid_t uid;
 541         static gid_t gid;
 542         static char lastname[MAXPATHLEN];
 543         char thisname[MAXPATHLEN];
 544         unsigned int l1 = 0, l2 = 0;
 545         char *p;
 546         struct file_struct *file;
 547
 548         if (!fptr) {
 549                 modtime = 0, mode = 0;
 550                 rdev = 0, dev = 0;
 551                 uid = 0, gid = 0;
 552                 *lastname = '\0';
 553                 return;
 554         }
 555
 556         if (flags & XMIT_SAME_NAME)
 557                 l1 = read_byte(f);
 558
 559         if (flags & XMIT_LONG_NAME)
 560                 l2 = read_int(f);
 561         else
 562                 l2 = read_byte(f);
 563
 564         file = new(struct file_struct);
 565         if (!file)
 566                 out_of_memory("receive_file_entry");
 567         memset((char *) file, 0, sizeof(*file));
 568         (*fptr) = file;
 569
 570         if (l2 >= MAXPATHLEN - l1) {
 571                 rprintf(FERROR,
 572                         "overflow: flags=0x%x l1=%d l2=%d lastname=%s\n",
 573                         flags, l1, l2, lastname);
 574                 overflow("receive_file_entry");
 575         }
 576
 577         strlcpy(thisname, lastname, l1 + 1);
 578         read_sbuf(f, &thisname[l1], l2);
 579         thisname[l1 + l2] = 0;
 580
 581         strlcpy(lastname, thisname, MAXPATHLEN);
 582         lastname[MAXPATHLEN - 1] = 0;
 583
 584         clean_fname(thisname);
 585
 586         if (sanitize_paths) {
 587                 sanitize_path(thisname, NULL);
 588         }
 589
 590         if ((p = strrchr(thisname, '/'))) {
 591                 static char *lastdir;
 592                 *p = 0;
 593                 if (lastdir && strcmp(thisname, lastdir) == 0)
 594                         file->dirname = lastdir;
 595                 else {
 596                         file->dirname = strdup(thisname);
 597                         lastdir = file->dirname;
 598                 }
 599                 file->basename = strdup(p + 1);
 600         } else {
 601                 file->dirname = NULL;
 602                 file->basename = strdup(thisname);
 603         }
 604
 605         if (!file->basename)
 606                 out_of_memory("receive_file_entry 1");
 607
 608         file->flags = flags & XMIT_TOP_DIR ? FLAG_TOP_DIR : 0;
 609         file->length = read_longint(f);
 610         if (!(flags & XMIT_SAME_TIME))
 611                 modtime = (time_t)read_int(f);
 612         file->modtime = modtime;
 613         if (!(flags & XMIT_SAME_MODE))
 614                 mode = from_wire_mode(read_int(f));
 615         file->mode = mode;
 616
 617         if (preserve_uid) {
 618                 if (!(flags & XMIT_SAME_UID))
 619                         uid = (uid_t)read_int(f);
 620                 file->uid = uid;
 621         }
 622         if (preserve_gid) {
 623                 if (!(flags & XMIT_SAME_GID))
 624                         gid = (gid_t)read_int(f);
 625                 file->gid = gid;
 626         }
 627         if (preserve_devices) {
 628                 if (protocol_version < 28) {
 629                         if (IS_DEVICE(mode)) {
 630                                 if (!(flags & XMIT_SAME_RDEV_pre28))
 631                                         rdev = (DEV64_T)read_int(f);
 632                                 file->u.rdev = rdev;
 633                         } else
 634                                 rdev = 0;
 635                 } else if (IS_DEVICE(mode)) {
 636                         if (!(flags & XMIT_SAME_HIGH_RDEV)) {
 637                                 file->u.rdev = (DEV64_T)read_int(f);
 638                                 rdev = file->u.rdev & ~0xFF;
 639                         } else
 640                                 file->u.rdev = rdev | (DEV64_T)read_byte(f);
 641                 }
 642         }
 643
 644         if (preserve_links && S_ISLNK(mode)) {
 645                 int l = read_int(f);
 646                 if (l < 0) {
 647                         rprintf(FERROR, "overflow: l=%d\n", l);
 648                         overflow("receive_file_entry");
 649                 }
 650                 if (!(file->u.link = new_array(char, l + 1)))
 651                         out_of_memory("receive_file_entry 2");
 652                 read_sbuf(f, file->u.link, l);
 653                 if (sanitize_paths)
 654                         sanitize_path(file->u.link, file->dirname);
 655         }
 656 #if SUPPORT_HARD_LINKS
 657         if (preserve_hard_links && protocol_version < 28 && S_ISREG(mode))
 658                 flags |= XMIT_HAS_IDEV_DATA;
 659         if (flags & XMIT_HAS_IDEV_DATA) {
 660                 if (!(file->link_u.idev = new(struct idev)))
 661                         out_of_memory("file inode data");
 662                 if (protocol_version < 26) {
 663                         dev = read_int(f);
 664                         file->F_INODE = read_int(f);
 665                 } else {
 666                         if (!(flags & XMIT_SAME_DEV))
 667                                 dev = read_longint(f);
 668                         file->F_INODE = read_longint(f);
 669                 }
 670                 file->F_DEV = dev;
 671         }
 672 #endif
 673
 674         if (always_checksum) {
 675                 char *sum;
 676                 if (S_ISREG(mode)) {
 677                         sum = file->u.sum = new_array(char, MD4_SUM_LENGTH);
 678                         if (!sum)
 679                                 out_of_memory("md4 sum");
 680                 } else if (protocol_version < 28) {
 681                         /* Prior to 28, we get a useless set of nulls. */
 682                         sum = empty_sum;
 683                 } else
 684                         sum = NULL;
 685                 if (sum) {
 686                         read_buf(f, sum, protocol_version < 21? 2
 687                                                 : MD4_SUM_LENGTH);
 688                 }
 689         }
 690
 691         if (!preserve_perms) {
 692                 extern int orig_umask;
 693                 /* set an appropriate set of permissions based on original
 694                  * permissions and umask. This emulates what GNU cp does */
 695                 file->mode &= ~orig_umask;
 696         }
 697 }
 698
 699
 700 #define STRDUP(ap, p)   (ap ? string_area_strdup(ap, p) : strdup(p))
 701 /* IRIX cc cares that the operands to the ternary have the same type. */
 702 #define MALLOC(ap, i)   (ap ? (void*) string_area_malloc(ap, i) : malloc(i))
 703
 704 /**
 705  * Create a file_struct for a named file by reading its stat()
 706  * information and performing extensive checks against global
 707  * options.
 708  *
 709  * @return the new file, or NULL if there was an error or this file
 710  * should be excluded.
 711  *
 712  * @todo There is a small optimization opportunity here to avoid
 713  * stat()ing the file in some circumstances, which has a certain cost.
 714  * We are called immediately after doing readdir(), and so we may
 715  * already know the d_type of the file.  We could for example avoid
 716  * statting directories if we're not recursing, but this is not a very
 717  * important case.  Some systems may not have d_type.
 718  **/
 719 struct file_struct *make_file(char *fname, struct string_area **ap,
 720                               int exclude_level)
 721 {
 722         struct file_struct *file;
 723         STRUCT_STAT st;
 724         char sum[SUM_LENGTH];
 725         char *p;
 726         char cleaned_name[MAXPATHLEN];
 727         char linkbuf[MAXPATHLEN];
 728         unsigned short flags = 0;
 729
 730         if (strlcpy(cleaned_name, fname, sizeof cleaned_name)
 731             >= sizeof cleaned_name - flist_dir_len) {
 732                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
 733                 return NULL;
 734         }
 735         clean_fname(cleaned_name);
 736         if (sanitize_paths)
 737                 sanitize_path(cleaned_name, NULL);
 738         fname = cleaned_name;
 739
 740         memset(sum, 0, SUM_LENGTH);
 741
 742         if (readlink_stat(fname, &st, linkbuf) != 0) {
 743                 int save_errno = errno;
 744                 if (errno == ENOENT && exclude_level != NO_EXCLUDES) {
 745                         /* either symlink pointing nowhere or file that
 746                          * was removed during rsync run; see if excluded
 747                          * before reporting an error */
 748                         if (check_exclude_file(fname, 0, exclude_level)) {
 749                                 /* file is excluded anyway, ignore silently */
 750                                 return NULL;
 751                         }
 752                 }
 753                 io_error |= IOERR_GENERAL;
 754                 rprintf(FERROR, "readlink %s failed: %s\n",
 755                         full_fname(fname), strerror(save_errno));
 756                 return NULL;
 757         }
 758
 759         /* backup.c calls us with exclude_level set to NO_EXCLUDES. */
 760         if (exclude_level == NO_EXCLUDES)
 761                 goto skip_excludes;
 762
 763         if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
 764                 rprintf(FINFO, "skipping directory %s\n", fname);
 765                 return NULL;
 766         }
 767
 768         if (one_file_system && st.st_dev != filesystem_dev) {
 769                 /* We allow a directory though to preserve the mount point.
 770                  * However, flag it so that we don't recurse. */
 771                 if (!S_ISDIR(st.st_mode))
 772                         return NULL;
 773                 flags |= FLAG_MOUNT_POINT;
 774         }
 775
 776         if (check_exclude_file(fname, S_ISDIR(st.st_mode) != 0, exclude_level))
 777                 return NULL;
 778
 779         if (lp_ignore_nonreadable(module_id) && access(fname, R_OK) != 0)
 780                 return NULL;
 781
 782       skip_excludes:
 783
 784         if (verbose > 2)
 785                 rprintf(FINFO, "make_file(%s,*,%d)\n", fname, exclude_level);
 786
 787         file = new(struct file_struct);
 788         if (!file)
 789                 out_of_memory("make_file");
 790         memset((char *) file, 0, sizeof(*file));
 791         file->flags = flags;
 792
 793         if ((p = strrchr(fname, '/'))) {
 794                 static char *lastdir;
 795                 *p = 0;
 796                 if (lastdir && strcmp(fname, lastdir) == 0)
 797                         file->dirname = lastdir;
 798                 else {
 799                         file->dirname = strdup(fname);
 800                         lastdir = file->dirname;
 801                 }
 802                 file->basename = STRDUP(ap, p + 1);
 803                 *p = '/';
 804         } else {
 805                 file->dirname = NULL;
 806                 file->basename = STRDUP(ap, fname);
 807         }
 808
 809         file->modtime = st.st_mtime;
 810         file->length = st.st_size;
 811         file->mode = st.st_mode;
 812         file->uid = st.st_uid;
 813         file->gid = st.st_gid;
 814         if (preserve_hard_links) {
 815                 if (protocol_version < 28 ? S_ISREG(st.st_mode)
 816                     : !S_ISDIR(st.st_mode) && st.st_nlink > 1) {
 817                         if (!(file->link_u.idev = new(struct idev)))
 818                                 out_of_memory("file inode data");
 819                         file->F_DEV = st.st_dev;
 820                         file->F_INODE = st.st_ino;
 821                 }
 822         }
 823 #ifdef HAVE_STRUCT_STAT_ST_RDEV
 824         if (IS_DEVICE(st.st_mode))
 825                 file->u.rdev = st.st_rdev;
 826 #endif
 827
 828 #if SUPPORT_LINKS
 829         if (S_ISLNK(st.st_mode))
 830                 file->u.link = STRDUP(ap, linkbuf);
 831 #endif
 832
 833         if (always_checksum && S_ISREG(st.st_mode)) {
 834                 if (!(file->u.sum = (char*)MALLOC(ap, MD4_SUM_LENGTH)))
 835                         out_of_memory("md4 sum");
 836                 file_checksum(fname, file->u.sum, st.st_size);
 837         }
 838
 839         file->basedir = flist_dir;
 840
 841         if (!S_ISDIR(st.st_mode))
 842                 stats.total_size += st.st_size;
 843
 844         return file;
 845 }
 846
 847
 848 void send_file_name(int f, struct file_list *flist, char *fname,
 849                     int recursive, unsigned short base_flags)
 850 {
 851         struct file_struct *file;
 852         char fbuf[MAXPATHLEN];
 853         extern int delete_excluded;
 854
 855         /* f is set to -1 when calculating deletion file list */
 856         file = make_file(fname, &flist->string_area,
 857                          f == -1 && delete_excluded? SERVER_EXCLUDES
 858                                                    : ALL_EXCLUDES);
 859
 860         if (!file)
 861                 return;
 862
 863         maybe_emit_filelist_progress(flist);
 864
 865         flist_expand(flist);
 866
 867         if (write_batch)
 868                 file->flags |= FLAG_TOP_DIR;
 869
 870         if (file->basename[0]) {
 871                 flist->files[flist->count++] = file;
 872                 send_file_entry(file, f, base_flags);
 873         }
 874
 875         if (recursive && S_ISDIR(file->mode)
 876             && !(file->flags & FLAG_MOUNT_POINT)) {
 877                 struct exclude_struct **last_exclude_list = local_exclude_list;
 878                 send_directory(f, flist, f_name_to(file, fbuf));
 879                 local_exclude_list = last_exclude_list;
 880                 return;
 881         }
 882 }
 883
 884
 885 static void send_directory(int f, struct file_list *flist, char *dir)
 886 {
 887         DIR *d;
 888         struct dirent *di;
 889         char fname[MAXPATHLEN];
 890         unsigned int offset;
 891         char *p;
 892
 893         d = opendir(dir);
 894         if (!d) {
 895                 io_error |= IOERR_GENERAL;
 896                 rprintf(FERROR, "opendir %s failed: %s\n",
 897                         full_fname(dir), strerror(errno));
 898                 return;
 899         }
 900
 901         offset = strlcpy(fname, dir, MAXPATHLEN);
 902         p = fname + offset;
 903         if (offset >= MAXPATHLEN || p[-1] != '/') {
 904                 if (offset >= MAXPATHLEN - 1) {
 905                         io_error |= IOERR_GENERAL;
 906                         rprintf(FERROR, "skipping long-named directory: %s\n",
 907                                 full_fname(fname));
 908                         closedir(d);
 909                         return;
 910                 }
 911                 *p++ = '/';
 912                 offset++;
 913         }
 914
 915         local_exclude_list = NULL;
 916
 917         if (cvs_exclude) {
 918                 if (strlcpy(p, ".cvsignore", MAXPATHLEN - offset)
 919                     < MAXPATHLEN - offset)
 920                         add_exclude_file(&local_exclude_list,fname,MISSING_OK,ADD_EXCLUDE);
 921                 else {
 922                         io_error |= IOERR_GENERAL;
 923                         rprintf(FINFO,
 924                                 "cannot cvs-exclude in long-named directory %s\n",
 925                                 full_fname(fname));
 926                 }
 927         }
 928
 929         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
 930                 char *dname = d_name(di);
 931                 if (dname[0] == '.' && (dname[1] == '\0'
 932                     || (dname[1] == '.' && dname[2] == '\0')))
 933                         continue;
 934                 if (strlcpy(p, dname, MAXPATHLEN - offset) < MAXPATHLEN - offset)
 935                         send_file_name(f, flist, fname, recurse, 0);
 936                 else {
 937                         io_error |= IOERR_GENERAL;
 938                         rprintf(FINFO,
 939                                 "cannot send long-named file %s\n",
 940                                 full_fname(fname));
 941                 }
 942         }
 943         if (errno) {
 944                 io_error |= IOERR_GENERAL;
 945                 rprintf(FERROR, "readdir(%s): (%d) %s\n",
 946                         dir, errno, strerror(errno));
 947         }
 948
 949         if (local_exclude_list)
 950                 free_exclude_list(&local_exclude_list); /* Zeros pointer too */
 951
 952         closedir(d);
 953 }
 954
 955
 956 /**
 957  * The delete_files() function in receiver.c sets f to -1 so that we just
 958  * construct the file list in memory without sending it over the wire.  It
 959  * also has the side-effect of ignoring user-excludes if delete_excluded
 960  * is set (so that the delete list includes user-excluded files).
 961  **/
 962 struct file_list *send_file_list(int f, int argc, char *argv[])
 963 {
 964         int l;
 965         STRUCT_STAT st;
 966         char *p, *dir, olddir[sizeof curr_dir];
 967         char lastpath[MAXPATHLEN] = "";
 968         struct file_list *flist;
 969         int64 start_write;
 970         int use_ff_fd = 0;
 971
 972         if (show_filelist_p() && f != -1)
 973                 start_filelist_progress("building file list");
 974
 975         start_write = stats.total_written;
 976
 977         flist = flist_new();
 978
 979         if (f != -1) {
 980                 io_start_buffering_out(f);
 981                 if (filesfrom_fd >= 0) {
 982                         if (argv[0] && !push_dir(argv[0])) {
 983                                 rprintf(FERROR, "push_dir %s failed: %s\n",
 984                                         full_fname(argv[0]), strerror(errno));
 985                                 exit_cleanup(RERR_FILESELECT);
 986                         }
 987                         use_ff_fd = 1;
 988                 }
 989         }
 990
 991         while (1) {
 992                 char fname2[MAXPATHLEN];
 993                 char *fname = fname2;
 994
 995                 if (use_ff_fd) {
 996                         if (read_filesfrom_line(filesfrom_fd, fname) == 0)
 997                                 break;
 998                         sanitize_path(fname, NULL);
 999                 } else {
1000                         if (argc-- == 0)
1001                                 break;
1002                         strlcpy(fname, *argv++, MAXPATHLEN);
1003                         if (sanitize_paths)
1004                                 sanitize_path(fname, NULL);
1005                 }
1006
1007                 l = strlen(fname);
1008                 if (fname[l - 1] == '/') {
1009                         if (l == 2 && fname[0] == '.') {
1010                                 /* Turn "./" into just "." rather than "./." */
1011                                 fname[1] = '\0';
1012                         } else if (l < MAXPATHLEN) {
1013                                 fname[l++] = '.';
1014                                 fname[l] = '\0';
1015                         }
1016                 }
1017
1018                 if (link_stat(fname, &st) != 0) {
1019                         if (f != -1) {
1020                                 io_error |= IOERR_GENERAL;
1021                                 rprintf(FERROR, "link_stat %s failed: %s\n",
1022                                         full_fname(fname), strerror(errno));
1023                         }
1024                         continue;
1025                 }
1026
1027                 if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
1028                         rprintf(FINFO, "skipping directory %s\n", fname);
1029                         continue;
1030                 }
1031
1032                 dir = NULL;
1033                 olddir[0] = '\0';
1034
1035                 if (!relative_paths) {
1036                         p = strrchr(fname, '/');
1037                         if (p) {
1038                                 *p = 0;
1039                                 if (p == fname)
1040                                         dir = "/";
1041                                 else
1042                                         dir = fname;
1043                                 fname = p + 1;
1044                         }
1045                 } else if (f != -1 && implied_dirs && (p=strrchr(fname,'/')) && p != fname) {
1046                         /* this ensures we send the intermediate directories,
1047                            thus getting their permissions right */
1048                         char *lp = lastpath, *fn = fname, *slash = fname;
1049                         *p = 0;
1050                         /* Skip any initial directories in our path that we
1051                          * have in common with lastpath. */
1052                         while (*fn && *lp == *fn) {
1053                                 if (*fn == '/')
1054                                         slash = fn;
1055                                 lp++, fn++;
1056                         }
1057                         *p = '/';
1058                         if (fn != p || (*lp && *lp != '/')) {
1059                                 int copy_links_saved = copy_links;
1060                                 int recurse_saved = recurse;
1061                                 copy_links = copy_unsafe_links;
1062                                 /* set recurse to 1 to prevent make_file
1063                                  * from ignoring directory, but still
1064                                  * turn off the recursive parameter to
1065                                  * send_file_name */
1066                                 recurse = 1;
1067                                 while ((slash = strchr(slash+1, '/')) != 0) {
1068                                         *slash = 0;
1069                                         send_file_name(f, flist, fname, 0, 0);
1070                                         *slash = '/';
1071                                 }
1072                                 copy_links = copy_links_saved;
1073                                 recurse = recurse_saved;
1074                                 *p = 0;
1075                                 strlcpy(lastpath, fname, sizeof lastpath);
1076                                 *p = '/';
1077                         }
1078                 }
1079
1080                 if (!*fname)
1081                         fname = ".";
1082
1083                 if (dir && *dir) {
1084                         static char *lastdir;
1085                         static int lastdir_len;
1086
1087                         strcpy(olddir, curr_dir); /* can't overflow */
1088
1089                         if (!push_dir(dir)) {
1090                                 io_error |= IOERR_GENERAL;
1091                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1092                                         full_fname(dir), strerror(errno));
1093                                 continue;
1094                         }
1095
1096                         if (lastdir && strcmp(lastdir, dir) == 0) {
1097                                 flist_dir = lastdir;
1098                                 flist_dir_len = lastdir_len;
1099                         } else {
1100                                 flist_dir = lastdir = strdup(dir);
1101                                 flist_dir_len = lastdir_len = strlen(dir);
1102                         }
1103                 }
1104
1105                 if (one_file_system)
1106                         set_filesystem(fname);
1107
1108                 send_file_name(f, flist, fname, recurse, XMIT_TOP_DIR);
1109
1110                 if (olddir[0]) {
1111                         flist_dir = NULL;
1112                         flist_dir_len = 0;
1113                         if (!pop_dir(olddir)) {
1114                                 rprintf(FERROR, "pop_dir %s failed: %s\n",
1115                                         full_fname(dir), strerror(errno));
1116                                 exit_cleanup(RERR_FILESELECT);
1117                         }
1118                 }
1119         }
1120
1121         if (f != -1) {
1122                 send_file_entry(NULL, f, 0);
1123
1124                 if (show_filelist_p())
1125                         finish_filelist_progress(flist);
1126         }
1127
1128         clean_flist(flist, 0, 0);
1129
1130         if (f != -1) {
1131                 /* Now send the uid/gid list. This was introduced in
1132                  * protocol version 15 */
1133                 send_uid_list(f);
1134
1135                 /* send the io_error flag */
1136                 write_int(f, lp_ignore_errors(module_id) ? 0 : io_error);
1137
1138                 io_end_buffering();
1139                 stats.flist_size = stats.total_written - start_write;
1140                 stats.num_files = flist->count;
1141                 if (write_batch)
1142                         write_batch_flist_info(flist->count, flist->files);
1143         }
1144
1145         if (verbose > 2)
1146                 rprintf(FINFO, "send_file_list done\n");
1147
1148         return flist;
1149 }
1150
1151
1152 struct file_list *recv_file_list(int f)
1153 {
1154         struct file_list *flist;
1155         unsigned short flags;
1156         int64 start_read;
1157         extern int list_only;
1158
1159         if (show_filelist_p())
1160                 start_filelist_progress("receiving file list");
1161
1162         start_read = stats.total_read;
1163
1164         flist = new(struct file_list);
1165         if (!flist)
1166                 goto oom;
1167
1168         flist->count = 0;
1169         flist->malloced = 1000;
1170         flist->files = new_array(struct file_struct *, flist->malloced);
1171         if (!flist->files)
1172                 goto oom;
1173
1174
1175         while ((flags = read_byte(f)) != 0) {
1176                 int i = flist->count;
1177
1178                 flist_expand(flist);
1179
1180                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
1181                         flags |= read_byte(f) << 8;
1182                 receive_file_entry(&flist->files[i], flags, f);
1183
1184                 if (S_ISREG(flist->files[i]->mode))
1185                         stats.total_size += flist->files[i]->length;
1186
1187                 flist->count++;
1188
1189                 maybe_emit_filelist_progress(flist);
1190
1191                 if (verbose > 2) {
1192                         rprintf(FINFO, "recv_file_name(%s)\n",
1193                                 f_name(flist->files[i]));
1194                 }
1195         }
1196         receive_file_entry(NULL, 0, 0); /* Signal that we're done. */
1197
1198         if (verbose > 2)
1199                 rprintf(FINFO, "received %d names\n", flist->count);
1200
1201         if (show_filelist_p())
1202                 finish_filelist_progress(flist);
1203
1204         clean_flist(flist, relative_paths, 1);
1205
1206         if (f != -1) {
1207                 /* Now send the uid/gid list. This was introduced in
1208                  * protocol version 15 */
1209                 recv_uid_list(f, flist);
1210
1211                 if (!read_batch) {
1212                         /* Recv the io_error flag */
1213                         if (lp_ignore_errors(module_id) || ignore_errors)
1214                                 read_int(f);
1215                         else
1216                                 io_error |= read_int(f);
1217                 }
1218         }
1219
1220         if (list_only) {
1221                 int i;
1222                 for (i = 0; i < flist->count; i++)
1223                         list_file_entry(flist->files[i]);
1224         }
1225
1226         if (verbose > 2)
1227                 rprintf(FINFO, "recv_file_list done\n");
1228
1229         stats.flist_size = stats.total_read - start_read;
1230         stats.num_files = flist->count;
1231
1232         return flist;
1233
1234       oom:
1235         out_of_memory("recv_file_list");
1236         return NULL;            /* not reached */
1237 }
1238
1239
1240 int file_compare(struct file_struct **file1, struct file_struct **file2)
1241 {
1242         struct file_struct *f1 = *file1;
1243         struct file_struct *f2 = *file2;
1244
1245         if (!f1->basename && !f2->basename)
1246                 return 0;
1247         if (!f1->basename)
1248                 return -1;
1249         if (!f2->basename)
1250                 return 1;
1251         if (f1->dirname == f2->dirname)
1252                 return u_strcmp(f1->basename, f2->basename);
1253         return f_name_cmp(f1, f2);
1254 }
1255
1256
1257 int flist_find(struct file_list *flist, struct file_struct *f)
1258 {
1259         int low = 0, high = flist->count - 1;
1260
1261         while (high >= 0 && !flist->files[high]->basename) high--;
1262
1263         if (high < 0)
1264                 return -1;
1265
1266         while (low != high) {
1267                 int mid = (low + high) / 2;
1268                 int ret = file_compare(&flist->files[flist_up(flist, mid)],&f);
1269                 if (ret == 0)
1270                         return flist_up(flist, mid);
1271                 if (ret > 0)
1272                         high = mid;
1273                 else
1274                         low = mid + 1;
1275         }
1276
1277         if (file_compare(&flist->files[flist_up(flist, low)], &f) == 0)
1278                 return flist_up(flist, low);
1279         return -1;
1280 }
1281
1282
1283 /*
1284  * free up one file
1285  */
1286 void free_file(struct file_struct *file)
1287 {
1288         if (!file)
1289                 return;
1290         if (file->basename)
1291                 free(file->basename);
1292         if (!IS_DEVICE(file->mode) && file->u.link)
1293                 free(file->u.link); /* Handles u.sum too. */
1294         if (file->link_u.idev)
1295                 free((char*)file->link_u.idev); /* Handles link_u.links too. */
1296         *file = null_file;
1297 }
1298
1299
1300 /*
1301  * allocate a new file list
1302  */
1303 struct file_list *flist_new(void)
1304 {
1305         struct file_list *flist;
1306
1307         flist = new(struct file_list);
1308         if (!flist)
1309                 out_of_memory("send_file_list");
1310
1311         flist->count = 0;
1312         flist->malloced = 0;
1313         flist->files = NULL;
1314
1315 #if ARENA_SIZE > 0
1316         flist->string_area = string_area_new(0);
1317 #else
1318         flist->string_area = NULL;
1319 #endif
1320         return flist;
1321 }
1322
1323 /*
1324  * free up all elements in a flist
1325  */
1326 void flist_free(struct file_list *flist)
1327 {
1328         int i;
1329         for (i = 1; i < flist->count; i++) {
1330                 if (!flist->string_area)
1331                         free_file(flist->files[i]);
1332                 free(flist->files[i]);
1333         }
1334         /* FIXME: I don't think we generally need to blank the flist
1335          * since it's about to be freed.  This will just cause more
1336          * memory traffic.  If you want a freed-memory debugger, you
1337          * know where to get it. */
1338         memset((char *) flist->files, 0,
1339                sizeof(flist->files[0]) * flist->count);
1340         free(flist->files);
1341         if (flist->string_area)
1342                 string_area_free(flist->string_area);
1343         memset((char *) flist, 0, sizeof(*flist));
1344         free(flist);
1345 }
1346
1347
1348 /*
1349  * This routine ensures we don't have any duplicate names in our file list.
1350  * duplicate names can cause corruption because of the pipelining
1351  */
1352 static void clean_flist(struct file_list *flist, int strip_root, int no_dups)
1353 {
1354         int i, prev_i = 0;
1355
1356         if (!flist || flist->count == 0)
1357                 return;
1358
1359         qsort(flist->files, flist->count,
1360               sizeof(flist->files[0]), (int (*)()) file_compare);
1361
1362         for (i = no_dups? 0 : flist->count; i < flist->count; i++) {
1363                 if (flist->files[i]->basename) {
1364                         prev_i = i;
1365                         break;
1366                 }
1367         }
1368         while (++i < flist->count) {
1369                 if (!flist->files[i]->basename)
1370                         continue;
1371                 if (f_name_cmp(flist->files[i], flist->files[prev_i]) == 0) {
1372                         if (verbose > 1 && !am_server) {
1373                                 rprintf(FINFO,
1374                                         "removing duplicate name %s from file list %d\n",
1375                                         f_name(flist->files[i]), i);
1376                         }
1377                         /* Make sure that if we unduplicate '.', that we don't
1378                          * lose track of a user-specified starting point (or
1379                          * else deletions will mysteriously fail with -R). */
1380                         if (flist->files[i]->flags & FLAG_TOP_DIR)
1381                                 flist->files[prev_i]->flags |= FLAG_TOP_DIR;
1382                         /* it's not great that the flist knows the semantics of
1383                          * the file memory usage, but i'd rather not add a flag
1384                          * byte to that struct.
1385                          * XXX can i use a bit in the flags field? */
1386                         if (flist->string_area)
1387                                 flist->files[i][0] = null_file;
1388                         else
1389                                 free_file(flist->files[i]);
1390                 } else
1391                         prev_i = i;
1392         }
1393
1394         if (strip_root) {
1395                 /* we need to strip off the root directory in the case
1396                    of relative paths, but this must be done _after_
1397                    the sorting phase */
1398                 for (i = 0; i < flist->count; i++) {
1399                         if (flist->files[i]->dirname &&
1400                             flist->files[i]->dirname[0] == '/') {
1401                                 memmove(&flist->files[i]->dirname[0],
1402                                         &flist->files[i]->dirname[1],
1403                                         strlen(flist->files[i]->dirname));
1404                         }
1405
1406                         if (flist->files[i]->dirname &&
1407                             !flist->files[i]->dirname[0]) {
1408                                 flist->files[i]->dirname = NULL;
1409                         }
1410                 }
1411         }
1412
1413         if (verbose <= 3)
1414                 return;
1415
1416         for (i = 0; i < flist->count; i++) {
1417                 rprintf(FINFO, "[%ld] i=%d %s %s %s mode=0%o len=%.0f\n",
1418                         (long) getpid(), i,
1419                         NS(flist->files[i]->basedir),
1420                         NS(flist->files[i]->dirname),
1421                         NS(flist->files[i]->basename),
1422                         (int) flist->files[i]->mode,
1423                         (double) flist->files[i]->length);
1424         }
1425 }
1426
1427
1428 enum fnc_state { fnc_DIR, fnc_SLASH, fnc_BASE };
1429
1430 /* Compare the names of two file_struct entities, just like strcmp()
1431  * would do if it were operating on the joined strings.  We assume
1432  * that there are no 0-length strings.
1433  */
1434 int f_name_cmp(struct file_struct *f1, struct file_struct *f2)
1435 {
1436         int dif;
1437         const uchar *c1, *c2;
1438         enum fnc_state state1, state2;
1439
1440         if (!f1 || !f1->basename) {
1441                 if (!f2 || !f2->basename)
1442                         return 0;
1443                 return -1;
1444         }
1445         if (!f2 || !f2->basename)
1446                 return 1;
1447
1448         if (!(c1 = (uchar*)f1->dirname)) {
1449                 state1 = fnc_BASE;
1450                 c1 = (uchar*)f1->basename;
1451         } else
1452                 state1 = fnc_DIR;
1453         if (!(c2 = (uchar*)f2->dirname)) {
1454                 state2 = fnc_BASE;
1455                 c2 = (uchar*)f2->basename;
1456         } else
1457                 state2 = fnc_DIR;
1458
1459         while (1) {
1460                 if ((dif = (int)*c1 - (int)*c2) != 0)
1461                         break;
1462                 if (!*++c1) {
1463                         switch (state1) {
1464                         case fnc_DIR:
1465                                 state1 = fnc_SLASH;
1466                                 c1 = (uchar*)"/";
1467                                 break;
1468                         case fnc_SLASH:
1469                                 state1 = fnc_BASE;
1470                                 c1 = (uchar*)f1->basename;
1471                                 break;
1472                         case fnc_BASE:
1473                                 break;
1474                         }
1475                 }
1476                 if (!*++c2) {
1477                         switch (state2) {
1478                         case fnc_DIR:
1479                                 state2 = fnc_SLASH;
1480                                 c2 = (uchar*)"/";
1481                                 break;
1482                         case fnc_SLASH:
1483                                 state2 = fnc_BASE;
1484                                 c2 = (uchar*)f2->basename;
1485                                 break;
1486                         case fnc_BASE:
1487                                 if (!*c1)
1488                                         return 0;
1489                                 break;
1490                         }
1491                 }
1492         }
1493
1494         return dif;
1495 }
1496
1497
1498 /* Return a copy of the full filename of a flist entry, using the indicated
1499  * buffer.  No size-checking is done because we checked the size when creating
1500  * the file_struct entry.
1501  */
1502 char *f_name_to(struct file_struct *f, char *fbuf)
1503 {
1504         if (!f || !f->basename)
1505                 return NULL;
1506
1507         if (f->dirname) {
1508                 int len = strlen(f->dirname);
1509                 memcpy(fbuf, f->dirname, len);
1510                 fbuf[len] = '/';
1511                 strcpy(fbuf + len + 1, f->basename);
1512         } else
1513                 strcpy(fbuf, f->basename);
1514         return fbuf;
1515 }
1516
1517
1518 /* Like f_name_to(), but we rotate through 5 static buffers of our own.
1519  */
1520 char *f_name(struct file_struct *f)
1521 {
1522         static char names[5][MAXPATHLEN];
1523         static unsigned int n;
1524
1525         n = (n + 1) % (sizeof names / sizeof names[0]);
1526
1527         return f_name_to(f, names[n]);
1528 }